5198 lines
132 KiB
C
5198 lines
132 KiB
C
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/*****************************************************************************/
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/*
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* stallion.c -- stallion multiport serial driver.
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*
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* Copyright (C) 1996-1999 Stallion Technologies
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* Copyright (C) 1994-1996 Greg Ungerer.
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*
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* This code is loosely based on the Linux serial driver, written by
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* Linus Torvalds, Theodore T'so and others.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*****************************************************************************/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/serial.h>
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#include <linux/cd1400.h>
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#include <linux/sc26198.h>
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#include <linux/comstats.h>
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#include <linux/stallion.h>
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#include <linux/ioport.h>
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#include <linux/init.h>
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#include <linux/smp_lock.h>
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#include <linux/devfs_fs_kernel.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#ifdef CONFIG_PCI
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#include <linux/pci.h>
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#endif
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/*****************************************************************************/
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/*
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* Define different board types. Use the standard Stallion "assigned"
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* board numbers. Boards supported in this driver are abbreviated as
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* EIO = EasyIO and ECH = EasyConnection 8/32.
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*/
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#define BRD_EASYIO 20
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#define BRD_ECH 21
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#define BRD_ECHMC 22
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#define BRD_ECHPCI 26
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#define BRD_ECH64PCI 27
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#define BRD_EASYIOPCI 28
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/*
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* Define a configuration structure to hold the board configuration.
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* Need to set this up in the code (for now) with the boards that are
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* to be configured into the system. This is what needs to be modified
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* when adding/removing/modifying boards. Each line entry in the
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* stl_brdconf[] array is a board. Each line contains io/irq/memory
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* ranges for that board (as well as what type of board it is).
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* Some examples:
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* { BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },
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* This line would configure an EasyIO board (4 or 8, no difference),
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* at io address 2a0 and irq 10.
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* Another example:
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* { BRD_ECH, 0x2a8, 0x280, 0, 12, 0 },
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* This line will configure an EasyConnection 8/32 board at primary io
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* address 2a8, secondary io address 280 and irq 12.
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* Enter as many lines into this array as you want (only the first 4
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* will actually be used!). Any combination of EasyIO and EasyConnection
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* boards can be specified. EasyConnection 8/32 boards can share their
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* secondary io addresses between each other.
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*
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* NOTE: there is no need to put any entries in this table for PCI
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* boards. They will be found automatically by the driver - provided
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* PCI BIOS32 support is compiled into the kernel.
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*/
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typedef struct {
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int brdtype;
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int ioaddr1;
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int ioaddr2;
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unsigned long memaddr;
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int irq;
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int irqtype;
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} stlconf_t;
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static stlconf_t stl_brdconf[] = {
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/*{ BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },*/
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};
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static int stl_nrbrds = sizeof(stl_brdconf) / sizeof(stlconf_t);
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/*****************************************************************************/
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/*
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* Define some important driver characteristics. Device major numbers
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* allocated as per Linux Device Registry.
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*/
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#ifndef STL_SIOMEMMAJOR
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#define STL_SIOMEMMAJOR 28
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#endif
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#ifndef STL_SERIALMAJOR
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#define STL_SERIALMAJOR 24
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#endif
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#ifndef STL_CALLOUTMAJOR
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#define STL_CALLOUTMAJOR 25
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#endif
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/*
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* Set the TX buffer size. Bigger is better, but we don't want
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* to chew too much memory with buffers!
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*/
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#define STL_TXBUFLOW 512
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#define STL_TXBUFSIZE 4096
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/*****************************************************************************/
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/*
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* Define our local driver identity first. Set up stuff to deal with
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* all the local structures required by a serial tty driver.
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*/
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static char *stl_drvtitle = "Stallion Multiport Serial Driver";
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static char *stl_drvname = "stallion";
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static char *stl_drvversion = "5.6.0";
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static struct tty_driver *stl_serial;
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/*
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* We will need to allocate a temporary write buffer for chars that
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* come direct from user space. The problem is that a copy from user
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* space might cause a page fault (typically on a system that is
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* swapping!). All ports will share one buffer - since if the system
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* is already swapping a shared buffer won't make things any worse.
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*/
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static char *stl_tmpwritebuf;
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static DECLARE_MUTEX(stl_tmpwritesem);
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/*
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* Define a local default termios struct. All ports will be created
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* with this termios initially. Basically all it defines is a raw port
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* at 9600, 8 data bits, 1 stop bit.
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*/
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static struct termios stl_deftermios = {
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.c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
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.c_cc = INIT_C_CC,
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};
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/*
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* Define global stats structures. Not used often, and can be
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* re-used for each stats call.
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*/
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static comstats_t stl_comstats;
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static combrd_t stl_brdstats;
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static stlbrd_t stl_dummybrd;
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static stlport_t stl_dummyport;
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/*
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* Define global place to put buffer overflow characters.
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*/
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static char stl_unwanted[SC26198_RXFIFOSIZE];
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/*****************************************************************************/
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static stlbrd_t *stl_brds[STL_MAXBRDS];
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/*
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* Per board state flags. Used with the state field of the board struct.
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* Not really much here!
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*/
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#define BRD_FOUND 0x1
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/*
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* Define the port structure istate flags. These set of flags are
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* modified at interrupt time - so setting and reseting them needs
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* to be atomic. Use the bit clear/setting routines for this.
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*/
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#define ASYI_TXBUSY 1
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#define ASYI_TXLOW 2
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#define ASYI_DCDCHANGE 3
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#define ASYI_TXFLOWED 4
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/*
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* Define an array of board names as printable strings. Handy for
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* referencing boards when printing trace and stuff.
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*/
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static char *stl_brdnames[] = {
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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"EasyIO",
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"EC8/32-AT",
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"EC8/32-MC",
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(char *) NULL,
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(char *) NULL,
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(char *) NULL,
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"EC8/32-PCI",
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"EC8/64-PCI",
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"EasyIO-PCI",
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};
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/*****************************************************************************/
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/*
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* Define some string labels for arguments passed from the module
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* load line. These allow for easy board definitions, and easy
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* modification of the io, memory and irq resoucres.
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*/
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static int stl_nargs = 0;
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static char *board0[4];
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static char *board1[4];
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static char *board2[4];
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static char *board3[4];
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static char **stl_brdsp[] = {
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(char **) &board0,
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(char **) &board1,
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(char **) &board2,
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(char **) &board3
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};
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/*
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* Define a set of common board names, and types. This is used to
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* parse any module arguments.
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*/
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typedef struct stlbrdtype {
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char *name;
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int type;
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} stlbrdtype_t;
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static stlbrdtype_t stl_brdstr[] = {
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{ "easyio", BRD_EASYIO },
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{ "eio", BRD_EASYIO },
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{ "20", BRD_EASYIO },
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{ "ec8/32", BRD_ECH },
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{ "ec8/32-at", BRD_ECH },
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{ "ec8/32-isa", BRD_ECH },
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{ "ech", BRD_ECH },
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{ "echat", BRD_ECH },
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{ "21", BRD_ECH },
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{ "ec8/32-mc", BRD_ECHMC },
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{ "ec8/32-mca", BRD_ECHMC },
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{ "echmc", BRD_ECHMC },
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{ "echmca", BRD_ECHMC },
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{ "22", BRD_ECHMC },
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{ "ec8/32-pc", BRD_ECHPCI },
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{ "ec8/32-pci", BRD_ECHPCI },
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{ "26", BRD_ECHPCI },
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{ "ec8/64-pc", BRD_ECH64PCI },
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{ "ec8/64-pci", BRD_ECH64PCI },
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{ "ech-pci", BRD_ECH64PCI },
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{ "echpci", BRD_ECH64PCI },
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{ "echpc", BRD_ECH64PCI },
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{ "27", BRD_ECH64PCI },
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{ "easyio-pc", BRD_EASYIOPCI },
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{ "easyio-pci", BRD_EASYIOPCI },
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{ "eio-pci", BRD_EASYIOPCI },
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{ "eiopci", BRD_EASYIOPCI },
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{ "28", BRD_EASYIOPCI },
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};
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/*
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* Define the module agruments.
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*/
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MODULE_AUTHOR("Greg Ungerer");
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MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
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MODULE_LICENSE("GPL");
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module_param_array(board0, charp, &stl_nargs, 0);
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MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
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module_param_array(board1, charp, &stl_nargs, 0);
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MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
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module_param_array(board2, charp, &stl_nargs, 0);
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MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
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module_param_array(board3, charp, &stl_nargs, 0);
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MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
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/*****************************************************************************/
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/*
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* Hardware ID bits for the EasyIO and ECH boards. These defines apply
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* to the directly accessible io ports of these boards (not the uarts -
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* they are in cd1400.h and sc26198.h).
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*/
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#define EIO_8PORTRS 0x04
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#define EIO_4PORTRS 0x05
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#define EIO_8PORTDI 0x00
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#define EIO_8PORTM 0x06
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#define EIO_MK3 0x03
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#define EIO_IDBITMASK 0x07
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#define EIO_BRDMASK 0xf0
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#define ID_BRD4 0x10
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#define ID_BRD8 0x20
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#define ID_BRD16 0x30
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#define EIO_INTRPEND 0x08
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#define EIO_INTEDGE 0x00
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#define EIO_INTLEVEL 0x08
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#define EIO_0WS 0x10
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#define ECH_ID 0xa0
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#define ECH_IDBITMASK 0xe0
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#define ECH_BRDENABLE 0x08
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#define ECH_BRDDISABLE 0x00
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#define ECH_INTENABLE 0x01
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#define ECH_INTDISABLE 0x00
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#define ECH_INTLEVEL 0x02
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#define ECH_INTEDGE 0x00
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#define ECH_INTRPEND 0x01
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#define ECH_BRDRESET 0x01
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#define ECHMC_INTENABLE 0x01
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#define ECHMC_BRDRESET 0x02
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#define ECH_PNLSTATUS 2
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#define ECH_PNL16PORT 0x20
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#define ECH_PNLIDMASK 0x07
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#define ECH_PNLXPID 0x40
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#define ECH_PNLINTRPEND 0x80
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#define ECH_ADDR2MASK 0x1e0
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/*
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* Define the vector mapping bits for the programmable interrupt board
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* hardware. These bits encode the interrupt for the board to use - it
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* is software selectable (except the EIO-8M).
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*/
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static unsigned char stl_vecmap[] = {
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0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
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0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
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};
|
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|
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/*
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* Set up enable and disable macros for the ECH boards. They require
|
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* the secondary io address space to be activated and deactivated.
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* This way all ECH boards can share their secondary io region.
|
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* If this is an ECH-PCI board then also need to set the page pointer
|
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* to point to the correct page.
|
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*/
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#define BRDENABLE(brdnr,pagenr) \
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if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
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outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
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stl_brds[(brdnr)]->ioctrl); \
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else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
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outb((pagenr), stl_brds[(brdnr)]->ioctrl);
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|
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#define BRDDISABLE(brdnr) \
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if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
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outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
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stl_brds[(brdnr)]->ioctrl);
|
||
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|
||
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#define STL_CD1400MAXBAUD 230400
|
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#define STL_SC26198MAXBAUD 460800
|
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|
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#define STL_BAUDBASE 115200
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#define STL_CLOSEDELAY (5 * HZ / 10)
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|
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/*****************************************************************************/
|
||
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|
||
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#ifdef CONFIG_PCI
|
||
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|
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/*
|
||
|
* Define the Stallion PCI vendor and device IDs.
|
||
|
*/
|
||
|
#ifndef PCI_VENDOR_ID_STALLION
|
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#define PCI_VENDOR_ID_STALLION 0x124d
|
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#endif
|
||
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#ifndef PCI_DEVICE_ID_ECHPCI832
|
||
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#define PCI_DEVICE_ID_ECHPCI832 0x0000
|
||
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#endif
|
||
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#ifndef PCI_DEVICE_ID_ECHPCI864
|
||
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#define PCI_DEVICE_ID_ECHPCI864 0x0002
|
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#endif
|
||
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#ifndef PCI_DEVICE_ID_EIOPCI
|
||
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#define PCI_DEVICE_ID_EIOPCI 0x0003
|
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#endif
|
||
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|
||
|
/*
|
||
|
* Define structure to hold all Stallion PCI boards.
|
||
|
*/
|
||
|
typedef struct stlpcibrd {
|
||
|
unsigned short vendid;
|
||
|
unsigned short devid;
|
||
|
int brdtype;
|
||
|
} stlpcibrd_t;
|
||
|
|
||
|
static stlpcibrd_t stl_pcibrds[] = {
|
||
|
{ PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864, BRD_ECH64PCI },
|
||
|
{ PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI, BRD_EASYIOPCI },
|
||
|
{ PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832, BRD_ECHPCI },
|
||
|
{ PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410, BRD_ECHPCI },
|
||
|
};
|
||
|
|
||
|
static int stl_nrpcibrds = sizeof(stl_pcibrds) / sizeof(stlpcibrd_t);
|
||
|
|
||
|
#endif
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Define macros to extract a brd/port number from a minor number.
|
||
|
*/
|
||
|
#define MINOR2BRD(min) (((min) & 0xc0) >> 6)
|
||
|
#define MINOR2PORT(min) ((min) & 0x3f)
|
||
|
|
||
|
/*
|
||
|
* Define a baud rate table that converts termios baud rate selector
|
||
|
* into the actual baud rate value. All baud rate calculations are
|
||
|
* based on the actual baud rate required.
|
||
|
*/
|
||
|
static unsigned int stl_baudrates[] = {
|
||
|
0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
|
||
|
9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
|
||
|
};
|
||
|
|
||
|
/*
|
||
|
* Define some handy local macros...
|
||
|
*/
|
||
|
#undef MIN
|
||
|
#define MIN(a,b) (((a) <= (b)) ? (a) : (b))
|
||
|
|
||
|
#undef TOLOWER
|
||
|
#define TOLOWER(x) ((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x))
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Declare all those functions in this driver!
|
||
|
*/
|
||
|
|
||
|
static void stl_argbrds(void);
|
||
|
static int stl_parsebrd(stlconf_t *confp, char **argp);
|
||
|
|
||
|
static unsigned long stl_atol(char *str);
|
||
|
|
||
|
int stl_init(void);
|
||
|
static int stl_open(struct tty_struct *tty, struct file *filp);
|
||
|
static void stl_close(struct tty_struct *tty, struct file *filp);
|
||
|
static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count);
|
||
|
static void stl_putchar(struct tty_struct *tty, unsigned char ch);
|
||
|
static void stl_flushchars(struct tty_struct *tty);
|
||
|
static int stl_writeroom(struct tty_struct *tty);
|
||
|
static int stl_charsinbuffer(struct tty_struct *tty);
|
||
|
static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
|
||
|
static void stl_settermios(struct tty_struct *tty, struct termios *old);
|
||
|
static void stl_throttle(struct tty_struct *tty);
|
||
|
static void stl_unthrottle(struct tty_struct *tty);
|
||
|
static void stl_stop(struct tty_struct *tty);
|
||
|
static void stl_start(struct tty_struct *tty);
|
||
|
static void stl_flushbuffer(struct tty_struct *tty);
|
||
|
static void stl_breakctl(struct tty_struct *tty, int state);
|
||
|
static void stl_waituntilsent(struct tty_struct *tty, int timeout);
|
||
|
static void stl_sendxchar(struct tty_struct *tty, char ch);
|
||
|
static void stl_hangup(struct tty_struct *tty);
|
||
|
static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
|
||
|
static int stl_portinfo(stlport_t *portp, int portnr, char *pos);
|
||
|
static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data);
|
||
|
|
||
|
static int stl_brdinit(stlbrd_t *brdp);
|
||
|
static int stl_initports(stlbrd_t *brdp, stlpanel_t *panelp);
|
||
|
static int stl_getserial(stlport_t *portp, struct serial_struct __user *sp);
|
||
|
static int stl_setserial(stlport_t *portp, struct serial_struct __user *sp);
|
||
|
static int stl_getbrdstats(combrd_t __user *bp);
|
||
|
static int stl_getportstats(stlport_t *portp, comstats_t __user *cp);
|
||
|
static int stl_clrportstats(stlport_t *portp, comstats_t __user *cp);
|
||
|
static int stl_getportstruct(stlport_t __user *arg);
|
||
|
static int stl_getbrdstruct(stlbrd_t __user *arg);
|
||
|
static int stl_waitcarrier(stlport_t *portp, struct file *filp);
|
||
|
static int stl_eiointr(stlbrd_t *brdp);
|
||
|
static int stl_echatintr(stlbrd_t *brdp);
|
||
|
static int stl_echmcaintr(stlbrd_t *brdp);
|
||
|
static int stl_echpciintr(stlbrd_t *brdp);
|
||
|
static int stl_echpci64intr(stlbrd_t *brdp);
|
||
|
static void stl_offintr(void *private);
|
||
|
static void *stl_memalloc(int len);
|
||
|
static stlbrd_t *stl_allocbrd(void);
|
||
|
static stlport_t *stl_getport(int brdnr, int panelnr, int portnr);
|
||
|
|
||
|
static inline int stl_initbrds(void);
|
||
|
static inline int stl_initeio(stlbrd_t *brdp);
|
||
|
static inline int stl_initech(stlbrd_t *brdp);
|
||
|
static inline int stl_getbrdnr(void);
|
||
|
|
||
|
#ifdef CONFIG_PCI
|
||
|
static inline int stl_findpcibrds(void);
|
||
|
static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp);
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* CD1400 uart specific handling functions.
|
||
|
*/
|
||
|
static void stl_cd1400setreg(stlport_t *portp, int regnr, int value);
|
||
|
static int stl_cd1400getreg(stlport_t *portp, int regnr);
|
||
|
static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value);
|
||
|
static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp);
|
||
|
static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp);
|
||
|
static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp);
|
||
|
static int stl_cd1400getsignals(stlport_t *portp);
|
||
|
static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts);
|
||
|
static void stl_cd1400ccrwait(stlport_t *portp);
|
||
|
static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx);
|
||
|
static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx);
|
||
|
static void stl_cd1400disableintrs(stlport_t *portp);
|
||
|
static void stl_cd1400sendbreak(stlport_t *portp, int len);
|
||
|
static void stl_cd1400flowctrl(stlport_t *portp, int state);
|
||
|
static void stl_cd1400sendflow(stlport_t *portp, int state);
|
||
|
static void stl_cd1400flush(stlport_t *portp);
|
||
|
static int stl_cd1400datastate(stlport_t *portp);
|
||
|
static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase);
|
||
|
static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase);
|
||
|
static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr);
|
||
|
static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr);
|
||
|
static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr);
|
||
|
|
||
|
static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr);
|
||
|
|
||
|
/*
|
||
|
* SC26198 uart specific handling functions.
|
||
|
*/
|
||
|
static void stl_sc26198setreg(stlport_t *portp, int regnr, int value);
|
||
|
static int stl_sc26198getreg(stlport_t *portp, int regnr);
|
||
|
static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value);
|
||
|
static int stl_sc26198getglobreg(stlport_t *portp, int regnr);
|
||
|
static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp);
|
||
|
static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp);
|
||
|
static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp);
|
||
|
static int stl_sc26198getsignals(stlport_t *portp);
|
||
|
static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts);
|
||
|
static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx);
|
||
|
static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx);
|
||
|
static void stl_sc26198disableintrs(stlport_t *portp);
|
||
|
static void stl_sc26198sendbreak(stlport_t *portp, int len);
|
||
|
static void stl_sc26198flowctrl(stlport_t *portp, int state);
|
||
|
static void stl_sc26198sendflow(stlport_t *portp, int state);
|
||
|
static void stl_sc26198flush(stlport_t *portp);
|
||
|
static int stl_sc26198datastate(stlport_t *portp);
|
||
|
static void stl_sc26198wait(stlport_t *portp);
|
||
|
static void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty);
|
||
|
static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase);
|
||
|
static void stl_sc26198txisr(stlport_t *port);
|
||
|
static void stl_sc26198rxisr(stlport_t *port, unsigned int iack);
|
||
|
static void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch);
|
||
|
static void stl_sc26198rxbadchars(stlport_t *portp);
|
||
|
static void stl_sc26198otherisr(stlport_t *port, unsigned int iack);
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Generic UART support structure.
|
||
|
*/
|
||
|
typedef struct uart {
|
||
|
int (*panelinit)(stlbrd_t *brdp, stlpanel_t *panelp);
|
||
|
void (*portinit)(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp);
|
||
|
void (*setport)(stlport_t *portp, struct termios *tiosp);
|
||
|
int (*getsignals)(stlport_t *portp);
|
||
|
void (*setsignals)(stlport_t *portp, int dtr, int rts);
|
||
|
void (*enablerxtx)(stlport_t *portp, int rx, int tx);
|
||
|
void (*startrxtx)(stlport_t *portp, int rx, int tx);
|
||
|
void (*disableintrs)(stlport_t *portp);
|
||
|
void (*sendbreak)(stlport_t *portp, int len);
|
||
|
void (*flowctrl)(stlport_t *portp, int state);
|
||
|
void (*sendflow)(stlport_t *portp, int state);
|
||
|
void (*flush)(stlport_t *portp);
|
||
|
int (*datastate)(stlport_t *portp);
|
||
|
void (*intr)(stlpanel_t *panelp, unsigned int iobase);
|
||
|
} uart_t;
|
||
|
|
||
|
/*
|
||
|
* Define some macros to make calling these functions nice and clean.
|
||
|
*/
|
||
|
#define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
|
||
|
#define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
|
||
|
#define stl_setport (* ((uart_t *) portp->uartp)->setport)
|
||
|
#define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
|
||
|
#define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
|
||
|
#define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
|
||
|
#define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
|
||
|
#define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
|
||
|
#define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
|
||
|
#define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
|
||
|
#define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
|
||
|
#define stl_flush (* ((uart_t *) portp->uartp)->flush)
|
||
|
#define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* CD1400 UART specific data initialization.
|
||
|
*/
|
||
|
static uart_t stl_cd1400uart = {
|
||
|
stl_cd1400panelinit,
|
||
|
stl_cd1400portinit,
|
||
|
stl_cd1400setport,
|
||
|
stl_cd1400getsignals,
|
||
|
stl_cd1400setsignals,
|
||
|
stl_cd1400enablerxtx,
|
||
|
stl_cd1400startrxtx,
|
||
|
stl_cd1400disableintrs,
|
||
|
stl_cd1400sendbreak,
|
||
|
stl_cd1400flowctrl,
|
||
|
stl_cd1400sendflow,
|
||
|
stl_cd1400flush,
|
||
|
stl_cd1400datastate,
|
||
|
stl_cd1400eiointr
|
||
|
};
|
||
|
|
||
|
/*
|
||
|
* Define the offsets within the register bank of a cd1400 based panel.
|
||
|
* These io address offsets are common to the EasyIO board as well.
|
||
|
*/
|
||
|
#define EREG_ADDR 0
|
||
|
#define EREG_DATA 4
|
||
|
#define EREG_RXACK 5
|
||
|
#define EREG_TXACK 6
|
||
|
#define EREG_MDACK 7
|
||
|
|
||
|
#define EREG_BANKSIZE 8
|
||
|
|
||
|
#define CD1400_CLK 25000000
|
||
|
#define CD1400_CLK8M 20000000
|
||
|
|
||
|
/*
|
||
|
* Define the cd1400 baud rate clocks. These are used when calculating
|
||
|
* what clock and divisor to use for the required baud rate. Also
|
||
|
* define the maximum baud rate allowed, and the default base baud.
|
||
|
*/
|
||
|
static int stl_cd1400clkdivs[] = {
|
||
|
CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
|
||
|
};
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* SC26198 UART specific data initization.
|
||
|
*/
|
||
|
static uart_t stl_sc26198uart = {
|
||
|
stl_sc26198panelinit,
|
||
|
stl_sc26198portinit,
|
||
|
stl_sc26198setport,
|
||
|
stl_sc26198getsignals,
|
||
|
stl_sc26198setsignals,
|
||
|
stl_sc26198enablerxtx,
|
||
|
stl_sc26198startrxtx,
|
||
|
stl_sc26198disableintrs,
|
||
|
stl_sc26198sendbreak,
|
||
|
stl_sc26198flowctrl,
|
||
|
stl_sc26198sendflow,
|
||
|
stl_sc26198flush,
|
||
|
stl_sc26198datastate,
|
||
|
stl_sc26198intr
|
||
|
};
|
||
|
|
||
|
/*
|
||
|
* Define the offsets within the register bank of a sc26198 based panel.
|
||
|
*/
|
||
|
#define XP_DATA 0
|
||
|
#define XP_ADDR 1
|
||
|
#define XP_MODID 2
|
||
|
#define XP_STATUS 2
|
||
|
#define XP_IACK 3
|
||
|
|
||
|
#define XP_BANKSIZE 4
|
||
|
|
||
|
/*
|
||
|
* Define the sc26198 baud rate table. Offsets within the table
|
||
|
* represent the actual baud rate selector of sc26198 registers.
|
||
|
*/
|
||
|
static unsigned int sc26198_baudtable[] = {
|
||
|
50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
|
||
|
4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
|
||
|
230400, 460800, 921600
|
||
|
};
|
||
|
|
||
|
#define SC26198_NRBAUDS (sizeof(sc26198_baudtable) / sizeof(unsigned int))
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Define the driver info for a user level control device. Used mainly
|
||
|
* to get at port stats - only not using the port device itself.
|
||
|
*/
|
||
|
static struct file_operations stl_fsiomem = {
|
||
|
.owner = THIS_MODULE,
|
||
|
.ioctl = stl_memioctl,
|
||
|
};
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
static struct class_simple *stallion_class;
|
||
|
|
||
|
/*
|
||
|
* Loadable module initialization stuff.
|
||
|
*/
|
||
|
|
||
|
static int __init stallion_module_init(void)
|
||
|
{
|
||
|
unsigned long flags;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("init_module()\n");
|
||
|
#endif
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
stl_init();
|
||
|
restore_flags(flags);
|
||
|
|
||
|
return(0);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
static void __exit stallion_module_exit(void)
|
||
|
{
|
||
|
stlbrd_t *brdp;
|
||
|
stlpanel_t *panelp;
|
||
|
stlport_t *portp;
|
||
|
unsigned long flags;
|
||
|
int i, j, k;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("cleanup_module()\n");
|
||
|
#endif
|
||
|
|
||
|
printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
|
||
|
stl_drvversion);
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
|
||
|
/*
|
||
|
* Free up all allocated resources used by the ports. This includes
|
||
|
* memory and interrupts. As part of this process we will also do
|
||
|
* a hangup on every open port - to try to flush out any processes
|
||
|
* hanging onto ports.
|
||
|
*/
|
||
|
i = tty_unregister_driver(stl_serial);
|
||
|
put_tty_driver(stl_serial);
|
||
|
if (i) {
|
||
|
printk("STALLION: failed to un-register tty driver, "
|
||
|
"errno=%d\n", -i);
|
||
|
restore_flags(flags);
|
||
|
return;
|
||
|
}
|
||
|
for (i = 0; i < 4; i++) {
|
||
|
devfs_remove("staliomem/%d", i);
|
||
|
class_simple_device_remove(MKDEV(STL_SIOMEMMAJOR, i));
|
||
|
}
|
||
|
devfs_remove("staliomem");
|
||
|
if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
|
||
|
printk("STALLION: failed to un-register serial memory device, "
|
||
|
"errno=%d\n", -i);
|
||
|
class_simple_destroy(stallion_class);
|
||
|
|
||
|
if (stl_tmpwritebuf != (char *) NULL)
|
||
|
kfree(stl_tmpwritebuf);
|
||
|
|
||
|
for (i = 0; (i < stl_nrbrds); i++) {
|
||
|
if ((brdp = stl_brds[i]) == (stlbrd_t *) NULL)
|
||
|
continue;
|
||
|
|
||
|
free_irq(brdp->irq, brdp);
|
||
|
|
||
|
for (j = 0; (j < STL_MAXPANELS); j++) {
|
||
|
panelp = brdp->panels[j];
|
||
|
if (panelp == (stlpanel_t *) NULL)
|
||
|
continue;
|
||
|
for (k = 0; (k < STL_PORTSPERPANEL); k++) {
|
||
|
portp = panelp->ports[k];
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
continue;
|
||
|
if (portp->tty != (struct tty_struct *) NULL)
|
||
|
stl_hangup(portp->tty);
|
||
|
if (portp->tx.buf != (char *) NULL)
|
||
|
kfree(portp->tx.buf);
|
||
|
kfree(portp);
|
||
|
}
|
||
|
kfree(panelp);
|
||
|
}
|
||
|
|
||
|
release_region(brdp->ioaddr1, brdp->iosize1);
|
||
|
if (brdp->iosize2 > 0)
|
||
|
release_region(brdp->ioaddr2, brdp->iosize2);
|
||
|
|
||
|
kfree(brdp);
|
||
|
stl_brds[i] = (stlbrd_t *) NULL;
|
||
|
}
|
||
|
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
module_init(stallion_module_init);
|
||
|
module_exit(stallion_module_exit);
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Check for any arguments passed in on the module load command line.
|
||
|
*/
|
||
|
|
||
|
static void stl_argbrds(void)
|
||
|
{
|
||
|
stlconf_t conf;
|
||
|
stlbrd_t *brdp;
|
||
|
int i;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_argbrds()\n");
|
||
|
#endif
|
||
|
|
||
|
for (i = stl_nrbrds; (i < stl_nargs); i++) {
|
||
|
memset(&conf, 0, sizeof(conf));
|
||
|
if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
|
||
|
continue;
|
||
|
if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL)
|
||
|
continue;
|
||
|
stl_nrbrds = i + 1;
|
||
|
brdp->brdnr = i;
|
||
|
brdp->brdtype = conf.brdtype;
|
||
|
brdp->ioaddr1 = conf.ioaddr1;
|
||
|
brdp->ioaddr2 = conf.ioaddr2;
|
||
|
brdp->irq = conf.irq;
|
||
|
brdp->irqtype = conf.irqtype;
|
||
|
stl_brdinit(brdp);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Convert an ascii string number into an unsigned long.
|
||
|
*/
|
||
|
|
||
|
static unsigned long stl_atol(char *str)
|
||
|
{
|
||
|
unsigned long val;
|
||
|
int base, c;
|
||
|
char *sp;
|
||
|
|
||
|
val = 0;
|
||
|
sp = str;
|
||
|
if ((*sp == '0') && (*(sp+1) == 'x')) {
|
||
|
base = 16;
|
||
|
sp += 2;
|
||
|
} else if (*sp == '0') {
|
||
|
base = 8;
|
||
|
sp++;
|
||
|
} else {
|
||
|
base = 10;
|
||
|
}
|
||
|
|
||
|
for (; (*sp != 0); sp++) {
|
||
|
c = (*sp > '9') ? (TOLOWER(*sp) - 'a' + 10) : (*sp - '0');
|
||
|
if ((c < 0) || (c >= base)) {
|
||
|
printk("STALLION: invalid argument %s\n", str);
|
||
|
val = 0;
|
||
|
break;
|
||
|
}
|
||
|
val = (val * base) + c;
|
||
|
}
|
||
|
return(val);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Parse the supplied argument string, into the board conf struct.
|
||
|
*/
|
||
|
|
||
|
static int stl_parsebrd(stlconf_t *confp, char **argp)
|
||
|
{
|
||
|
char *sp;
|
||
|
int nrbrdnames, i;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_parsebrd(confp=%x,argp=%x)\n", (int) confp, (int) argp);
|
||
|
#endif
|
||
|
|
||
|
if ((argp[0] == (char *) NULL) || (*argp[0] == 0))
|
||
|
return(0);
|
||
|
|
||
|
for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++)
|
||
|
*sp = TOLOWER(*sp);
|
||
|
|
||
|
nrbrdnames = sizeof(stl_brdstr) / sizeof(stlbrdtype_t);
|
||
|
for (i = 0; (i < nrbrdnames); i++) {
|
||
|
if (strcmp(stl_brdstr[i].name, argp[0]) == 0)
|
||
|
break;
|
||
|
}
|
||
|
if (i >= nrbrdnames) {
|
||
|
printk("STALLION: unknown board name, %s?\n", argp[0]);
|
||
|
return(0);
|
||
|
}
|
||
|
|
||
|
confp->brdtype = stl_brdstr[i].type;
|
||
|
|
||
|
i = 1;
|
||
|
if ((argp[i] != (char *) NULL) && (*argp[i] != 0))
|
||
|
confp->ioaddr1 = stl_atol(argp[i]);
|
||
|
i++;
|
||
|
if (confp->brdtype == BRD_ECH) {
|
||
|
if ((argp[i] != (char *) NULL) && (*argp[i] != 0))
|
||
|
confp->ioaddr2 = stl_atol(argp[i]);
|
||
|
i++;
|
||
|
}
|
||
|
if ((argp[i] != (char *) NULL) && (*argp[i] != 0))
|
||
|
confp->irq = stl_atol(argp[i]);
|
||
|
return(1);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Local driver kernel memory allocation routine.
|
||
|
*/
|
||
|
|
||
|
static void *stl_memalloc(int len)
|
||
|
{
|
||
|
return((void *) kmalloc(len, GFP_KERNEL));
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Allocate a new board structure. Fill out the basic info in it.
|
||
|
*/
|
||
|
|
||
|
static stlbrd_t *stl_allocbrd(void)
|
||
|
{
|
||
|
stlbrd_t *brdp;
|
||
|
|
||
|
brdp = (stlbrd_t *) stl_memalloc(sizeof(stlbrd_t));
|
||
|
if (brdp == (stlbrd_t *) NULL) {
|
||
|
printk("STALLION: failed to allocate memory (size=%d)\n",
|
||
|
sizeof(stlbrd_t));
|
||
|
return((stlbrd_t *) NULL);
|
||
|
}
|
||
|
|
||
|
memset(brdp, 0, sizeof(stlbrd_t));
|
||
|
brdp->magic = STL_BOARDMAGIC;
|
||
|
return(brdp);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
static int stl_open(struct tty_struct *tty, struct file *filp)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
stlbrd_t *brdp;
|
||
|
unsigned int minordev;
|
||
|
int brdnr, panelnr, portnr, rc;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_open(tty=%x,filp=%x): device=%s\n", (int) tty,
|
||
|
(int) filp, tty->name);
|
||
|
#endif
|
||
|
|
||
|
minordev = tty->index;
|
||
|
brdnr = MINOR2BRD(minordev);
|
||
|
if (brdnr >= stl_nrbrds)
|
||
|
return(-ENODEV);
|
||
|
brdp = stl_brds[brdnr];
|
||
|
if (brdp == (stlbrd_t *) NULL)
|
||
|
return(-ENODEV);
|
||
|
minordev = MINOR2PORT(minordev);
|
||
|
for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) {
|
||
|
if (brdp->panels[panelnr] == (stlpanel_t *) NULL)
|
||
|
break;
|
||
|
if (minordev < brdp->panels[panelnr]->nrports) {
|
||
|
portnr = minordev;
|
||
|
break;
|
||
|
}
|
||
|
minordev -= brdp->panels[panelnr]->nrports;
|
||
|
}
|
||
|
if (portnr < 0)
|
||
|
return(-ENODEV);
|
||
|
|
||
|
portp = brdp->panels[panelnr]->ports[portnr];
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return(-ENODEV);
|
||
|
|
||
|
/*
|
||
|
* On the first open of the device setup the port hardware, and
|
||
|
* initialize the per port data structure.
|
||
|
*/
|
||
|
portp->tty = tty;
|
||
|
tty->driver_data = portp;
|
||
|
portp->refcount++;
|
||
|
|
||
|
if ((portp->flags & ASYNC_INITIALIZED) == 0) {
|
||
|
if (portp->tx.buf == (char *) NULL) {
|
||
|
portp->tx.buf = (char *) stl_memalloc(STL_TXBUFSIZE);
|
||
|
if (portp->tx.buf == (char *) NULL)
|
||
|
return(-ENOMEM);
|
||
|
portp->tx.head = portp->tx.buf;
|
||
|
portp->tx.tail = portp->tx.buf;
|
||
|
}
|
||
|
stl_setport(portp, tty->termios);
|
||
|
portp->sigs = stl_getsignals(portp);
|
||
|
stl_setsignals(portp, 1, 1);
|
||
|
stl_enablerxtx(portp, 1, 1);
|
||
|
stl_startrxtx(portp, 1, 0);
|
||
|
clear_bit(TTY_IO_ERROR, &tty->flags);
|
||
|
portp->flags |= ASYNC_INITIALIZED;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Check if this port is in the middle of closing. If so then wait
|
||
|
* until it is closed then return error status, based on flag settings.
|
||
|
* The sleep here does not need interrupt protection since the wakeup
|
||
|
* for it is done with the same context.
|
||
|
*/
|
||
|
if (portp->flags & ASYNC_CLOSING) {
|
||
|
interruptible_sleep_on(&portp->close_wait);
|
||
|
if (portp->flags & ASYNC_HUP_NOTIFY)
|
||
|
return(-EAGAIN);
|
||
|
return(-ERESTARTSYS);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Based on type of open being done check if it can overlap with any
|
||
|
* previous opens still in effect. If we are a normal serial device
|
||
|
* then also we might have to wait for carrier.
|
||
|
*/
|
||
|
if (!(filp->f_flags & O_NONBLOCK)) {
|
||
|
if ((rc = stl_waitcarrier(portp, filp)) != 0)
|
||
|
return(rc);
|
||
|
}
|
||
|
portp->flags |= ASYNC_NORMAL_ACTIVE;
|
||
|
|
||
|
return(0);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Possibly need to wait for carrier (DCD signal) to come high. Say
|
||
|
* maybe because if we are clocal then we don't need to wait...
|
||
|
*/
|
||
|
|
||
|
static int stl_waitcarrier(stlport_t *portp, struct file *filp)
|
||
|
{
|
||
|
unsigned long flags;
|
||
|
int rc, doclocal;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_waitcarrier(portp=%x,filp=%x)\n", (int) portp, (int) filp);
|
||
|
#endif
|
||
|
|
||
|
rc = 0;
|
||
|
doclocal = 0;
|
||
|
|
||
|
if (portp->tty->termios->c_cflag & CLOCAL)
|
||
|
doclocal++;
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
portp->openwaitcnt++;
|
||
|
if (! tty_hung_up_p(filp))
|
||
|
portp->refcount--;
|
||
|
|
||
|
for (;;) {
|
||
|
stl_setsignals(portp, 1, 1);
|
||
|
if (tty_hung_up_p(filp) ||
|
||
|
((portp->flags & ASYNC_INITIALIZED) == 0)) {
|
||
|
if (portp->flags & ASYNC_HUP_NOTIFY)
|
||
|
rc = -EBUSY;
|
||
|
else
|
||
|
rc = -ERESTARTSYS;
|
||
|
break;
|
||
|
}
|
||
|
if (((portp->flags & ASYNC_CLOSING) == 0) &&
|
||
|
(doclocal || (portp->sigs & TIOCM_CD))) {
|
||
|
break;
|
||
|
}
|
||
|
if (signal_pending(current)) {
|
||
|
rc = -ERESTARTSYS;
|
||
|
break;
|
||
|
}
|
||
|
interruptible_sleep_on(&portp->open_wait);
|
||
|
}
|
||
|
|
||
|
if (! tty_hung_up_p(filp))
|
||
|
portp->refcount++;
|
||
|
portp->openwaitcnt--;
|
||
|
restore_flags(flags);
|
||
|
|
||
|
return(rc);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
static void stl_close(struct tty_struct *tty, struct file *filp)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
unsigned long flags;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_close(tty=%x,filp=%x)\n", (int) tty, (int) filp);
|
||
|
#endif
|
||
|
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
if (tty_hung_up_p(filp)) {
|
||
|
restore_flags(flags);
|
||
|
return;
|
||
|
}
|
||
|
if ((tty->count == 1) && (portp->refcount != 1))
|
||
|
portp->refcount = 1;
|
||
|
if (portp->refcount-- > 1) {
|
||
|
restore_flags(flags);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
portp->refcount = 0;
|
||
|
portp->flags |= ASYNC_CLOSING;
|
||
|
|
||
|
/*
|
||
|
* May want to wait for any data to drain before closing. The BUSY
|
||
|
* flag keeps track of whether we are still sending or not - it is
|
||
|
* very accurate for the cd1400, not quite so for the sc26198.
|
||
|
* (The sc26198 has no "end-of-data" interrupt only empty FIFO)
|
||
|
*/
|
||
|
tty->closing = 1;
|
||
|
if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
|
||
|
tty_wait_until_sent(tty, portp->closing_wait);
|
||
|
stl_waituntilsent(tty, (HZ / 2));
|
||
|
|
||
|
portp->flags &= ~ASYNC_INITIALIZED;
|
||
|
stl_disableintrs(portp);
|
||
|
if (tty->termios->c_cflag & HUPCL)
|
||
|
stl_setsignals(portp, 0, 0);
|
||
|
stl_enablerxtx(portp, 0, 0);
|
||
|
stl_flushbuffer(tty);
|
||
|
portp->istate = 0;
|
||
|
if (portp->tx.buf != (char *) NULL) {
|
||
|
kfree(portp->tx.buf);
|
||
|
portp->tx.buf = (char *) NULL;
|
||
|
portp->tx.head = (char *) NULL;
|
||
|
portp->tx.tail = (char *) NULL;
|
||
|
}
|
||
|
set_bit(TTY_IO_ERROR, &tty->flags);
|
||
|
tty_ldisc_flush(tty);
|
||
|
|
||
|
tty->closing = 0;
|
||
|
portp->tty = (struct tty_struct *) NULL;
|
||
|
|
||
|
if (portp->openwaitcnt) {
|
||
|
if (portp->close_delay)
|
||
|
msleep_interruptible(jiffies_to_msecs(portp->close_delay));
|
||
|
wake_up_interruptible(&portp->open_wait);
|
||
|
}
|
||
|
|
||
|
portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
|
||
|
wake_up_interruptible(&portp->close_wait);
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Write routine. Take data and stuff it in to the TX ring queue.
|
||
|
* If transmit interrupts are not running then start them.
|
||
|
*/
|
||
|
|
||
|
static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
unsigned int len, stlen;
|
||
|
unsigned char *chbuf;
|
||
|
char *head, *tail;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_write(tty=%x,buf=%x,count=%d)\n",
|
||
|
(int) tty, (int) buf, count);
|
||
|
#endif
|
||
|
|
||
|
if ((tty == (struct tty_struct *) NULL) ||
|
||
|
(stl_tmpwritebuf == (char *) NULL))
|
||
|
return(0);
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return(0);
|
||
|
if (portp->tx.buf == (char *) NULL)
|
||
|
return(0);
|
||
|
|
||
|
/*
|
||
|
* If copying direct from user space we must cater for page faults,
|
||
|
* causing us to "sleep" here for a while. To handle this copy in all
|
||
|
* the data we need now, into a local buffer. Then when we got it all
|
||
|
* copy it into the TX buffer.
|
||
|
*/
|
||
|
chbuf = (unsigned char *) buf;
|
||
|
|
||
|
head = portp->tx.head;
|
||
|
tail = portp->tx.tail;
|
||
|
if (head >= tail) {
|
||
|
len = STL_TXBUFSIZE - (head - tail) - 1;
|
||
|
stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
|
||
|
} else {
|
||
|
len = tail - head - 1;
|
||
|
stlen = len;
|
||
|
}
|
||
|
|
||
|
len = MIN(len, count);
|
||
|
count = 0;
|
||
|
while (len > 0) {
|
||
|
stlen = MIN(len, stlen);
|
||
|
memcpy(head, chbuf, stlen);
|
||
|
len -= stlen;
|
||
|
chbuf += stlen;
|
||
|
count += stlen;
|
||
|
head += stlen;
|
||
|
if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
|
||
|
head = portp->tx.buf;
|
||
|
stlen = tail - head;
|
||
|
}
|
||
|
}
|
||
|
portp->tx.head = head;
|
||
|
|
||
|
clear_bit(ASYI_TXLOW, &portp->istate);
|
||
|
stl_startrxtx(portp, -1, 1);
|
||
|
|
||
|
return(count);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
static void stl_putchar(struct tty_struct *tty, unsigned char ch)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
unsigned int len;
|
||
|
char *head, *tail;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_putchar(tty=%x,ch=%x)\n", (int) tty, (int) ch);
|
||
|
#endif
|
||
|
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return;
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
if (portp->tx.buf == (char *) NULL)
|
||
|
return;
|
||
|
|
||
|
head = portp->tx.head;
|
||
|
tail = portp->tx.tail;
|
||
|
|
||
|
len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
|
||
|
len--;
|
||
|
|
||
|
if (len > 0) {
|
||
|
*head++ = ch;
|
||
|
if (head >= (portp->tx.buf + STL_TXBUFSIZE))
|
||
|
head = portp->tx.buf;
|
||
|
}
|
||
|
portp->tx.head = head;
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* If there are any characters in the buffer then make sure that TX
|
||
|
* interrupts are on and get'em out. Normally used after the putchar
|
||
|
* routine has been called.
|
||
|
*/
|
||
|
|
||
|
static void stl_flushchars(struct tty_struct *tty)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_flushchars(tty=%x)\n", (int) tty);
|
||
|
#endif
|
||
|
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return;
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
if (portp->tx.buf == (char *) NULL)
|
||
|
return;
|
||
|
|
||
|
#if 0
|
||
|
if (tty->stopped || tty->hw_stopped ||
|
||
|
(portp->tx.head == portp->tx.tail))
|
||
|
return;
|
||
|
#endif
|
||
|
stl_startrxtx(portp, -1, 1);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
static int stl_writeroom(struct tty_struct *tty)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
char *head, *tail;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_writeroom(tty=%x)\n", (int) tty);
|
||
|
#endif
|
||
|
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return(0);
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return(0);
|
||
|
if (portp->tx.buf == (char *) NULL)
|
||
|
return(0);
|
||
|
|
||
|
head = portp->tx.head;
|
||
|
tail = portp->tx.tail;
|
||
|
return((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1));
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Return number of chars in the TX buffer. Normally we would just
|
||
|
* calculate the number of chars in the buffer and return that, but if
|
||
|
* the buffer is empty and TX interrupts are still on then we return
|
||
|
* that the buffer still has 1 char in it. This way whoever called us
|
||
|
* will not think that ALL chars have drained - since the UART still
|
||
|
* must have some chars in it (we are busy after all).
|
||
|
*/
|
||
|
|
||
|
static int stl_charsinbuffer(struct tty_struct *tty)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
unsigned int size;
|
||
|
char *head, *tail;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_charsinbuffer(tty=%x)\n", (int) tty);
|
||
|
#endif
|
||
|
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return(0);
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return(0);
|
||
|
if (portp->tx.buf == (char *) NULL)
|
||
|
return(0);
|
||
|
|
||
|
head = portp->tx.head;
|
||
|
tail = portp->tx.tail;
|
||
|
size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
|
||
|
if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
|
||
|
size = 1;
|
||
|
return(size);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Generate the serial struct info.
|
||
|
*/
|
||
|
|
||
|
static int stl_getserial(stlport_t *portp, struct serial_struct __user *sp)
|
||
|
{
|
||
|
struct serial_struct sio;
|
||
|
stlbrd_t *brdp;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_getserial(portp=%x,sp=%x)\n", (int) portp, (int) sp);
|
||
|
#endif
|
||
|
|
||
|
memset(&sio, 0, sizeof(struct serial_struct));
|
||
|
sio.line = portp->portnr;
|
||
|
sio.port = portp->ioaddr;
|
||
|
sio.flags = portp->flags;
|
||
|
sio.baud_base = portp->baud_base;
|
||
|
sio.close_delay = portp->close_delay;
|
||
|
sio.closing_wait = portp->closing_wait;
|
||
|
sio.custom_divisor = portp->custom_divisor;
|
||
|
sio.hub6 = 0;
|
||
|
if (portp->uartp == &stl_cd1400uart) {
|
||
|
sio.type = PORT_CIRRUS;
|
||
|
sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
|
||
|
} else {
|
||
|
sio.type = PORT_UNKNOWN;
|
||
|
sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
|
||
|
}
|
||
|
|
||
|
brdp = stl_brds[portp->brdnr];
|
||
|
if (brdp != (stlbrd_t *) NULL)
|
||
|
sio.irq = brdp->irq;
|
||
|
|
||
|
return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0;
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Set port according to the serial struct info.
|
||
|
* At this point we do not do any auto-configure stuff, so we will
|
||
|
* just quietly ignore any requests to change irq, etc.
|
||
|
*/
|
||
|
|
||
|
static int stl_setserial(stlport_t *portp, struct serial_struct __user *sp)
|
||
|
{
|
||
|
struct serial_struct sio;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_setserial(portp=%x,sp=%x)\n", (int) portp, (int) sp);
|
||
|
#endif
|
||
|
|
||
|
if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
|
||
|
return -EFAULT;
|
||
|
if (!capable(CAP_SYS_ADMIN)) {
|
||
|
if ((sio.baud_base != portp->baud_base) ||
|
||
|
(sio.close_delay != portp->close_delay) ||
|
||
|
((sio.flags & ~ASYNC_USR_MASK) !=
|
||
|
(portp->flags & ~ASYNC_USR_MASK)))
|
||
|
return(-EPERM);
|
||
|
}
|
||
|
|
||
|
portp->flags = (portp->flags & ~ASYNC_USR_MASK) |
|
||
|
(sio.flags & ASYNC_USR_MASK);
|
||
|
portp->baud_base = sio.baud_base;
|
||
|
portp->close_delay = sio.close_delay;
|
||
|
portp->closing_wait = sio.closing_wait;
|
||
|
portp->custom_divisor = sio.custom_divisor;
|
||
|
stl_setport(portp, portp->tty->termios);
|
||
|
return(0);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
static int stl_tiocmget(struct tty_struct *tty, struct file *file)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return(-ENODEV);
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return(-ENODEV);
|
||
|
if (tty->flags & (1 << TTY_IO_ERROR))
|
||
|
return(-EIO);
|
||
|
|
||
|
return stl_getsignals(portp);
|
||
|
}
|
||
|
|
||
|
static int stl_tiocmset(struct tty_struct *tty, struct file *file,
|
||
|
unsigned int set, unsigned int clear)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
int rts = -1, dtr = -1;
|
||
|
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return(-ENODEV);
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return(-ENODEV);
|
||
|
if (tty->flags & (1 << TTY_IO_ERROR))
|
||
|
return(-EIO);
|
||
|
|
||
|
if (set & TIOCM_RTS)
|
||
|
rts = 1;
|
||
|
if (set & TIOCM_DTR)
|
||
|
dtr = 1;
|
||
|
if (clear & TIOCM_RTS)
|
||
|
rts = 0;
|
||
|
if (clear & TIOCM_DTR)
|
||
|
dtr = 0;
|
||
|
|
||
|
stl_setsignals(portp, dtr, rts);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
unsigned int ival;
|
||
|
int rc;
|
||
|
void __user *argp = (void __user *)arg;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_ioctl(tty=%x,file=%x,cmd=%x,arg=%x)\n",
|
||
|
(int) tty, (int) file, cmd, (int) arg);
|
||
|
#endif
|
||
|
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return(-ENODEV);
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return(-ENODEV);
|
||
|
|
||
|
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
|
||
|
(cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) {
|
||
|
if (tty->flags & (1 << TTY_IO_ERROR))
|
||
|
return(-EIO);
|
||
|
}
|
||
|
|
||
|
rc = 0;
|
||
|
|
||
|
switch (cmd) {
|
||
|
case TIOCGSOFTCAR:
|
||
|
rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
|
||
|
(unsigned __user *) argp);
|
||
|
break;
|
||
|
case TIOCSSOFTCAR:
|
||
|
if (get_user(ival, (unsigned int __user *) arg))
|
||
|
return -EFAULT;
|
||
|
tty->termios->c_cflag =
|
||
|
(tty->termios->c_cflag & ~CLOCAL) |
|
||
|
(ival ? CLOCAL : 0);
|
||
|
break;
|
||
|
case TIOCGSERIAL:
|
||
|
rc = stl_getserial(portp, argp);
|
||
|
break;
|
||
|
case TIOCSSERIAL:
|
||
|
rc = stl_setserial(portp, argp);
|
||
|
break;
|
||
|
case COM_GETPORTSTATS:
|
||
|
rc = stl_getportstats(portp, argp);
|
||
|
break;
|
||
|
case COM_CLRPORTSTATS:
|
||
|
rc = stl_clrportstats(portp, argp);
|
||
|
break;
|
||
|
case TIOCSERCONFIG:
|
||
|
case TIOCSERGWILD:
|
||
|
case TIOCSERSWILD:
|
||
|
case TIOCSERGETLSR:
|
||
|
case TIOCSERGSTRUCT:
|
||
|
case TIOCSERGETMULTI:
|
||
|
case TIOCSERSETMULTI:
|
||
|
default:
|
||
|
rc = -ENOIOCTLCMD;
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
return(rc);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
static void stl_settermios(struct tty_struct *tty, struct termios *old)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
struct termios *tiosp;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_settermios(tty=%x,old=%x)\n", (int) tty, (int) old);
|
||
|
#endif
|
||
|
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return;
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
|
||
|
tiosp = tty->termios;
|
||
|
if ((tiosp->c_cflag == old->c_cflag) &&
|
||
|
(tiosp->c_iflag == old->c_iflag))
|
||
|
return;
|
||
|
|
||
|
stl_setport(portp, tiosp);
|
||
|
stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
|
||
|
-1);
|
||
|
if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
|
||
|
tty->hw_stopped = 0;
|
||
|
stl_start(tty);
|
||
|
}
|
||
|
if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
|
||
|
wake_up_interruptible(&portp->open_wait);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Attempt to flow control who ever is sending us data. Based on termios
|
||
|
* settings use software or/and hardware flow control.
|
||
|
*/
|
||
|
|
||
|
static void stl_throttle(struct tty_struct *tty)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_throttle(tty=%x)\n", (int) tty);
|
||
|
#endif
|
||
|
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return;
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
stl_flowctrl(portp, 0);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Unflow control the device sending us data...
|
||
|
*/
|
||
|
|
||
|
static void stl_unthrottle(struct tty_struct *tty)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_unthrottle(tty=%x)\n", (int) tty);
|
||
|
#endif
|
||
|
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return;
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
stl_flowctrl(portp, 1);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Stop the transmitter. Basically to do this we will just turn TX
|
||
|
* interrupts off.
|
||
|
*/
|
||
|
|
||
|
static void stl_stop(struct tty_struct *tty)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_stop(tty=%x)\n", (int) tty);
|
||
|
#endif
|
||
|
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return;
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
stl_startrxtx(portp, -1, 0);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Start the transmitter again. Just turn TX interrupts back on.
|
||
|
*/
|
||
|
|
||
|
static void stl_start(struct tty_struct *tty)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_start(tty=%x)\n", (int) tty);
|
||
|
#endif
|
||
|
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return;
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
stl_startrxtx(portp, -1, 1);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Hangup this port. This is pretty much like closing the port, only
|
||
|
* a little more brutal. No waiting for data to drain. Shutdown the
|
||
|
* port and maybe drop signals.
|
||
|
*/
|
||
|
|
||
|
static void stl_hangup(struct tty_struct *tty)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_hangup(tty=%x)\n", (int) tty);
|
||
|
#endif
|
||
|
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return;
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
|
||
|
portp->flags &= ~ASYNC_INITIALIZED;
|
||
|
stl_disableintrs(portp);
|
||
|
if (tty->termios->c_cflag & HUPCL)
|
||
|
stl_setsignals(portp, 0, 0);
|
||
|
stl_enablerxtx(portp, 0, 0);
|
||
|
stl_flushbuffer(tty);
|
||
|
portp->istate = 0;
|
||
|
set_bit(TTY_IO_ERROR, &tty->flags);
|
||
|
if (portp->tx.buf != (char *) NULL) {
|
||
|
kfree(portp->tx.buf);
|
||
|
portp->tx.buf = (char *) NULL;
|
||
|
portp->tx.head = (char *) NULL;
|
||
|
portp->tx.tail = (char *) NULL;
|
||
|
}
|
||
|
portp->tty = (struct tty_struct *) NULL;
|
||
|
portp->flags &= ~ASYNC_NORMAL_ACTIVE;
|
||
|
portp->refcount = 0;
|
||
|
wake_up_interruptible(&portp->open_wait);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
static void stl_flushbuffer(struct tty_struct *tty)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_flushbuffer(tty=%x)\n", (int) tty);
|
||
|
#endif
|
||
|
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return;
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
|
||
|
stl_flush(portp);
|
||
|
tty_wakeup(tty);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
static void stl_breakctl(struct tty_struct *tty, int state)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_breakctl(tty=%x,state=%d)\n", (int) tty, state);
|
||
|
#endif
|
||
|
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return;
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
|
||
|
stl_sendbreak(portp, ((state == -1) ? 1 : 2));
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
static void stl_waituntilsent(struct tty_struct *tty, int timeout)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
unsigned long tend;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_waituntilsent(tty=%x,timeout=%d)\n", (int) tty, timeout);
|
||
|
#endif
|
||
|
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return;
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
|
||
|
if (timeout == 0)
|
||
|
timeout = HZ;
|
||
|
tend = jiffies + timeout;
|
||
|
|
||
|
while (stl_datastate(portp)) {
|
||
|
if (signal_pending(current))
|
||
|
break;
|
||
|
msleep_interruptible(20);
|
||
|
if (time_after_eq(jiffies, tend))
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
static void stl_sendxchar(struct tty_struct *tty, char ch)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_sendxchar(tty=%x,ch=%x)\n", (int) tty, ch);
|
||
|
#endif
|
||
|
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return;
|
||
|
portp = tty->driver_data;
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
|
||
|
if (ch == STOP_CHAR(tty))
|
||
|
stl_sendflow(portp, 0);
|
||
|
else if (ch == START_CHAR(tty))
|
||
|
stl_sendflow(portp, 1);
|
||
|
else
|
||
|
stl_putchar(tty, ch);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
#define MAXLINE 80
|
||
|
|
||
|
/*
|
||
|
* Format info for a specified port. The line is deliberately limited
|
||
|
* to 80 characters. (If it is too long it will be truncated, if too
|
||
|
* short then padded with spaces).
|
||
|
*/
|
||
|
|
||
|
static int stl_portinfo(stlport_t *portp, int portnr, char *pos)
|
||
|
{
|
||
|
char *sp;
|
||
|
int sigs, cnt;
|
||
|
|
||
|
sp = pos;
|
||
|
sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d",
|
||
|
portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
|
||
|
(int) portp->stats.txtotal, (int) portp->stats.rxtotal);
|
||
|
|
||
|
if (portp->stats.rxframing)
|
||
|
sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing);
|
||
|
if (portp->stats.rxparity)
|
||
|
sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity);
|
||
|
if (portp->stats.rxbreaks)
|
||
|
sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks);
|
||
|
if (portp->stats.rxoverrun)
|
||
|
sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun);
|
||
|
|
||
|
sigs = stl_getsignals(portp);
|
||
|
cnt = sprintf(sp, "%s%s%s%s%s ",
|
||
|
(sigs & TIOCM_RTS) ? "|RTS" : "",
|
||
|
(sigs & TIOCM_CTS) ? "|CTS" : "",
|
||
|
(sigs & TIOCM_DTR) ? "|DTR" : "",
|
||
|
(sigs & TIOCM_CD) ? "|DCD" : "",
|
||
|
(sigs & TIOCM_DSR) ? "|DSR" : "");
|
||
|
*sp = ' ';
|
||
|
sp += cnt;
|
||
|
|
||
|
for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++)
|
||
|
*sp++ = ' ';
|
||
|
if (cnt >= MAXLINE)
|
||
|
pos[(MAXLINE - 2)] = '+';
|
||
|
pos[(MAXLINE - 1)] = '\n';
|
||
|
|
||
|
return(MAXLINE);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Port info, read from the /proc file system.
|
||
|
*/
|
||
|
|
||
|
static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
|
||
|
{
|
||
|
stlbrd_t *brdp;
|
||
|
stlpanel_t *panelp;
|
||
|
stlport_t *portp;
|
||
|
int brdnr, panelnr, portnr, totalport;
|
||
|
int curoff, maxoff;
|
||
|
char *pos;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_readproc(page=%x,start=%x,off=%x,count=%d,eof=%x,"
|
||
|
"data=%x\n", (int) page, (int) start, (int) off, count,
|
||
|
(int) eof, (int) data);
|
||
|
#endif
|
||
|
|
||
|
pos = page;
|
||
|
totalport = 0;
|
||
|
curoff = 0;
|
||
|
|
||
|
if (off == 0) {
|
||
|
pos += sprintf(pos, "%s: version %s", stl_drvtitle,
|
||
|
stl_drvversion);
|
||
|
while (pos < (page + MAXLINE - 1))
|
||
|
*pos++ = ' ';
|
||
|
*pos++ = '\n';
|
||
|
}
|
||
|
curoff = MAXLINE;
|
||
|
|
||
|
/*
|
||
|
* We scan through for each board, panel and port. The offset is
|
||
|
* calculated on the fly, and irrelevant ports are skipped.
|
||
|
*/
|
||
|
for (brdnr = 0; (brdnr < stl_nrbrds); brdnr++) {
|
||
|
brdp = stl_brds[brdnr];
|
||
|
if (brdp == (stlbrd_t *) NULL)
|
||
|
continue;
|
||
|
if (brdp->state == 0)
|
||
|
continue;
|
||
|
|
||
|
maxoff = curoff + (brdp->nrports * MAXLINE);
|
||
|
if (off >= maxoff) {
|
||
|
curoff = maxoff;
|
||
|
continue;
|
||
|
}
|
||
|
|
||
|
totalport = brdnr * STL_MAXPORTS;
|
||
|
for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) {
|
||
|
panelp = brdp->panels[panelnr];
|
||
|
if (panelp == (stlpanel_t *) NULL)
|
||
|
continue;
|
||
|
|
||
|
maxoff = curoff + (panelp->nrports * MAXLINE);
|
||
|
if (off >= maxoff) {
|
||
|
curoff = maxoff;
|
||
|
totalport += panelp->nrports;
|
||
|
continue;
|
||
|
}
|
||
|
|
||
|
for (portnr = 0; (portnr < panelp->nrports); portnr++,
|
||
|
totalport++) {
|
||
|
portp = panelp->ports[portnr];
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
continue;
|
||
|
if (off >= (curoff += MAXLINE))
|
||
|
continue;
|
||
|
if ((pos - page + MAXLINE) > count)
|
||
|
goto stl_readdone;
|
||
|
pos += stl_portinfo(portp, totalport, pos);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
*eof = 1;
|
||
|
|
||
|
stl_readdone:
|
||
|
*start = page;
|
||
|
return(pos - page);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* All board interrupts are vectored through here first. This code then
|
||
|
* calls off to the approrpriate board interrupt handlers.
|
||
|
*/
|
||
|
|
||
|
static irqreturn_t stl_intr(int irq, void *dev_id, struct pt_regs *regs)
|
||
|
{
|
||
|
stlbrd_t *brdp = (stlbrd_t *) dev_id;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_intr(brdp=%x,irq=%d,regs=%x)\n", (int) brdp, irq,
|
||
|
(int) regs);
|
||
|
#endif
|
||
|
|
||
|
return IRQ_RETVAL((* brdp->isr)(brdp));
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Interrupt service routine for EasyIO board types.
|
||
|
*/
|
||
|
|
||
|
static int stl_eiointr(stlbrd_t *brdp)
|
||
|
{
|
||
|
stlpanel_t *panelp;
|
||
|
unsigned int iobase;
|
||
|
int handled = 0;
|
||
|
|
||
|
panelp = brdp->panels[0];
|
||
|
iobase = panelp->iobase;
|
||
|
while (inb(brdp->iostatus) & EIO_INTRPEND) {
|
||
|
handled = 1;
|
||
|
(* panelp->isr)(panelp, iobase);
|
||
|
}
|
||
|
return handled;
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Interrupt service routine for ECH-AT board types.
|
||
|
*/
|
||
|
|
||
|
static int stl_echatintr(stlbrd_t *brdp)
|
||
|
{
|
||
|
stlpanel_t *panelp;
|
||
|
unsigned int ioaddr;
|
||
|
int bnknr;
|
||
|
int handled = 0;
|
||
|
|
||
|
outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
|
||
|
|
||
|
while (inb(brdp->iostatus) & ECH_INTRPEND) {
|
||
|
handled = 1;
|
||
|
for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
|
||
|
ioaddr = brdp->bnkstataddr[bnknr];
|
||
|
if (inb(ioaddr) & ECH_PNLINTRPEND) {
|
||
|
panelp = brdp->bnk2panel[bnknr];
|
||
|
(* panelp->isr)(panelp, (ioaddr & 0xfffc));
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
|
||
|
|
||
|
return handled;
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Interrupt service routine for ECH-MCA board types.
|
||
|
*/
|
||
|
|
||
|
static int stl_echmcaintr(stlbrd_t *brdp)
|
||
|
{
|
||
|
stlpanel_t *panelp;
|
||
|
unsigned int ioaddr;
|
||
|
int bnknr;
|
||
|
int handled = 0;
|
||
|
|
||
|
while (inb(brdp->iostatus) & ECH_INTRPEND) {
|
||
|
handled = 1;
|
||
|
for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
|
||
|
ioaddr = brdp->bnkstataddr[bnknr];
|
||
|
if (inb(ioaddr) & ECH_PNLINTRPEND) {
|
||
|
panelp = brdp->bnk2panel[bnknr];
|
||
|
(* panelp->isr)(panelp, (ioaddr & 0xfffc));
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
return handled;
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Interrupt service routine for ECH-PCI board types.
|
||
|
*/
|
||
|
|
||
|
static int stl_echpciintr(stlbrd_t *brdp)
|
||
|
{
|
||
|
stlpanel_t *panelp;
|
||
|
unsigned int ioaddr;
|
||
|
int bnknr, recheck;
|
||
|
int handled = 0;
|
||
|
|
||
|
while (1) {
|
||
|
recheck = 0;
|
||
|
for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
|
||
|
outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
|
||
|
ioaddr = brdp->bnkstataddr[bnknr];
|
||
|
if (inb(ioaddr) & ECH_PNLINTRPEND) {
|
||
|
panelp = brdp->bnk2panel[bnknr];
|
||
|
(* panelp->isr)(panelp, (ioaddr & 0xfffc));
|
||
|
recheck++;
|
||
|
handled = 1;
|
||
|
}
|
||
|
}
|
||
|
if (! recheck)
|
||
|
break;
|
||
|
}
|
||
|
return handled;
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Interrupt service routine for ECH-8/64-PCI board types.
|
||
|
*/
|
||
|
|
||
|
static int stl_echpci64intr(stlbrd_t *brdp)
|
||
|
{
|
||
|
stlpanel_t *panelp;
|
||
|
unsigned int ioaddr;
|
||
|
int bnknr;
|
||
|
int handled = 0;
|
||
|
|
||
|
while (inb(brdp->ioctrl) & 0x1) {
|
||
|
handled = 1;
|
||
|
for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
|
||
|
ioaddr = brdp->bnkstataddr[bnknr];
|
||
|
if (inb(ioaddr) & ECH_PNLINTRPEND) {
|
||
|
panelp = brdp->bnk2panel[bnknr];
|
||
|
(* panelp->isr)(panelp, (ioaddr & 0xfffc));
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return handled;
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Service an off-level request for some channel.
|
||
|
*/
|
||
|
static void stl_offintr(void *private)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
struct tty_struct *tty;
|
||
|
unsigned int oldsigs;
|
||
|
|
||
|
portp = private;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_offintr(portp=%x)\n", (int) portp);
|
||
|
#endif
|
||
|
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
|
||
|
tty = portp->tty;
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return;
|
||
|
|
||
|
lock_kernel();
|
||
|
if (test_bit(ASYI_TXLOW, &portp->istate)) {
|
||
|
tty_wakeup(tty);
|
||
|
}
|
||
|
if (test_bit(ASYI_DCDCHANGE, &portp->istate)) {
|
||
|
clear_bit(ASYI_DCDCHANGE, &portp->istate);
|
||
|
oldsigs = portp->sigs;
|
||
|
portp->sigs = stl_getsignals(portp);
|
||
|
if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
|
||
|
wake_up_interruptible(&portp->open_wait);
|
||
|
if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) {
|
||
|
if (portp->flags & ASYNC_CHECK_CD)
|
||
|
tty_hangup(tty); /* FIXME: module removal race here - AKPM */
|
||
|
}
|
||
|
}
|
||
|
unlock_kernel();
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Initialize all the ports on a panel.
|
||
|
*/
|
||
|
|
||
|
static int __init stl_initports(stlbrd_t *brdp, stlpanel_t *panelp)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
int chipmask, i;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_initports(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp);
|
||
|
#endif
|
||
|
|
||
|
chipmask = stl_panelinit(brdp, panelp);
|
||
|
|
||
|
/*
|
||
|
* All UART's are initialized (if found!). Now go through and setup
|
||
|
* each ports data structures.
|
||
|
*/
|
||
|
for (i = 0; (i < panelp->nrports); i++) {
|
||
|
portp = (stlport_t *) stl_memalloc(sizeof(stlport_t));
|
||
|
if (portp == (stlport_t *) NULL) {
|
||
|
printk("STALLION: failed to allocate memory "
|
||
|
"(size=%d)\n", sizeof(stlport_t));
|
||
|
break;
|
||
|
}
|
||
|
memset(portp, 0, sizeof(stlport_t));
|
||
|
|
||
|
portp->magic = STL_PORTMAGIC;
|
||
|
portp->portnr = i;
|
||
|
portp->brdnr = panelp->brdnr;
|
||
|
portp->panelnr = panelp->panelnr;
|
||
|
portp->uartp = panelp->uartp;
|
||
|
portp->clk = brdp->clk;
|
||
|
portp->baud_base = STL_BAUDBASE;
|
||
|
portp->close_delay = STL_CLOSEDELAY;
|
||
|
portp->closing_wait = 30 * HZ;
|
||
|
INIT_WORK(&portp->tqueue, stl_offintr, portp);
|
||
|
init_waitqueue_head(&portp->open_wait);
|
||
|
init_waitqueue_head(&portp->close_wait);
|
||
|
portp->stats.brd = portp->brdnr;
|
||
|
portp->stats.panel = portp->panelnr;
|
||
|
portp->stats.port = portp->portnr;
|
||
|
panelp->ports[i] = portp;
|
||
|
stl_portinit(brdp, panelp, portp);
|
||
|
}
|
||
|
|
||
|
return(0);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Try to find and initialize an EasyIO board.
|
||
|
*/
|
||
|
|
||
|
static inline int stl_initeio(stlbrd_t *brdp)
|
||
|
{
|
||
|
stlpanel_t *panelp;
|
||
|
unsigned int status;
|
||
|
char *name;
|
||
|
int rc;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_initeio(brdp=%x)\n", (int) brdp);
|
||
|
#endif
|
||
|
|
||
|
brdp->ioctrl = brdp->ioaddr1 + 1;
|
||
|
brdp->iostatus = brdp->ioaddr1 + 2;
|
||
|
|
||
|
status = inb(brdp->iostatus);
|
||
|
if ((status & EIO_IDBITMASK) == EIO_MK3)
|
||
|
brdp->ioctrl++;
|
||
|
|
||
|
/*
|
||
|
* Handle board specific stuff now. The real difference is PCI
|
||
|
* or not PCI.
|
||
|
*/
|
||
|
if (brdp->brdtype == BRD_EASYIOPCI) {
|
||
|
brdp->iosize1 = 0x80;
|
||
|
brdp->iosize2 = 0x80;
|
||
|
name = "serial(EIO-PCI)";
|
||
|
outb(0x41, (brdp->ioaddr2 + 0x4c));
|
||
|
} else {
|
||
|
brdp->iosize1 = 8;
|
||
|
name = "serial(EIO)";
|
||
|
if ((brdp->irq < 0) || (brdp->irq > 15) ||
|
||
|
(stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
|
||
|
printk("STALLION: invalid irq=%d for brd=%d\n",
|
||
|
brdp->irq, brdp->brdnr);
|
||
|
return(-EINVAL);
|
||
|
}
|
||
|
outb((stl_vecmap[brdp->irq] | EIO_0WS |
|
||
|
((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
|
||
|
brdp->ioctrl);
|
||
|
}
|
||
|
|
||
|
if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
|
||
|
printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
|
||
|
"%x conflicts with another device\n", brdp->brdnr,
|
||
|
brdp->ioaddr1);
|
||
|
return(-EBUSY);
|
||
|
}
|
||
|
|
||
|
if (brdp->iosize2 > 0)
|
||
|
if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
|
||
|
printk(KERN_WARNING "STALLION: Warning, board %d I/O "
|
||
|
"address %x conflicts with another device\n",
|
||
|
brdp->brdnr, brdp->ioaddr2);
|
||
|
printk(KERN_WARNING "STALLION: Warning, also "
|
||
|
"releasing board %d I/O address %x \n",
|
||
|
brdp->brdnr, brdp->ioaddr1);
|
||
|
release_region(brdp->ioaddr1, brdp->iosize1);
|
||
|
return(-EBUSY);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Everything looks OK, so let's go ahead and probe for the hardware.
|
||
|
*/
|
||
|
brdp->clk = CD1400_CLK;
|
||
|
brdp->isr = stl_eiointr;
|
||
|
|
||
|
switch (status & EIO_IDBITMASK) {
|
||
|
case EIO_8PORTM:
|
||
|
brdp->clk = CD1400_CLK8M;
|
||
|
/* fall thru */
|
||
|
case EIO_8PORTRS:
|
||
|
case EIO_8PORTDI:
|
||
|
brdp->nrports = 8;
|
||
|
break;
|
||
|
case EIO_4PORTRS:
|
||
|
brdp->nrports = 4;
|
||
|
break;
|
||
|
case EIO_MK3:
|
||
|
switch (status & EIO_BRDMASK) {
|
||
|
case ID_BRD4:
|
||
|
brdp->nrports = 4;
|
||
|
break;
|
||
|
case ID_BRD8:
|
||
|
brdp->nrports = 8;
|
||
|
break;
|
||
|
case ID_BRD16:
|
||
|
brdp->nrports = 16;
|
||
|
break;
|
||
|
default:
|
||
|
return(-ENODEV);
|
||
|
}
|
||
|
break;
|
||
|
default:
|
||
|
return(-ENODEV);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* We have verified that the board is actually present, so now we
|
||
|
* can complete the setup.
|
||
|
*/
|
||
|
|
||
|
panelp = (stlpanel_t *) stl_memalloc(sizeof(stlpanel_t));
|
||
|
if (panelp == (stlpanel_t *) NULL) {
|
||
|
printk(KERN_WARNING "STALLION: failed to allocate memory "
|
||
|
"(size=%d)\n", sizeof(stlpanel_t));
|
||
|
return(-ENOMEM);
|
||
|
}
|
||
|
memset(panelp, 0, sizeof(stlpanel_t));
|
||
|
|
||
|
panelp->magic = STL_PANELMAGIC;
|
||
|
panelp->brdnr = brdp->brdnr;
|
||
|
panelp->panelnr = 0;
|
||
|
panelp->nrports = brdp->nrports;
|
||
|
panelp->iobase = brdp->ioaddr1;
|
||
|
panelp->hwid = status;
|
||
|
if ((status & EIO_IDBITMASK) == EIO_MK3) {
|
||
|
panelp->uartp = (void *) &stl_sc26198uart;
|
||
|
panelp->isr = stl_sc26198intr;
|
||
|
} else {
|
||
|
panelp->uartp = (void *) &stl_cd1400uart;
|
||
|
panelp->isr = stl_cd1400eiointr;
|
||
|
}
|
||
|
|
||
|
brdp->panels[0] = panelp;
|
||
|
brdp->nrpanels = 1;
|
||
|
brdp->state |= BRD_FOUND;
|
||
|
brdp->hwid = status;
|
||
|
if (request_irq(brdp->irq, stl_intr, SA_SHIRQ, name, brdp) != 0) {
|
||
|
printk("STALLION: failed to register interrupt "
|
||
|
"routine for %s irq=%d\n", name, brdp->irq);
|
||
|
rc = -ENODEV;
|
||
|
} else {
|
||
|
rc = 0;
|
||
|
}
|
||
|
return(rc);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Try to find an ECH board and initialize it. This code is capable of
|
||
|
* dealing with all types of ECH board.
|
||
|
*/
|
||
|
|
||
|
static inline int stl_initech(stlbrd_t *brdp)
|
||
|
{
|
||
|
stlpanel_t *panelp;
|
||
|
unsigned int status, nxtid, ioaddr, conflict;
|
||
|
int panelnr, banknr, i;
|
||
|
char *name;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_initech(brdp=%x)\n", (int) brdp);
|
||
|
#endif
|
||
|
|
||
|
status = 0;
|
||
|
conflict = 0;
|
||
|
|
||
|
/*
|
||
|
* Set up the initial board register contents for boards. This varies a
|
||
|
* bit between the different board types. So we need to handle each
|
||
|
* separately. Also do a check that the supplied IRQ is good.
|
||
|
*/
|
||
|
switch (brdp->brdtype) {
|
||
|
|
||
|
case BRD_ECH:
|
||
|
brdp->isr = stl_echatintr;
|
||
|
brdp->ioctrl = brdp->ioaddr1 + 1;
|
||
|
brdp->iostatus = brdp->ioaddr1 + 1;
|
||
|
status = inb(brdp->iostatus);
|
||
|
if ((status & ECH_IDBITMASK) != ECH_ID)
|
||
|
return(-ENODEV);
|
||
|
if ((brdp->irq < 0) || (brdp->irq > 15) ||
|
||
|
(stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
|
||
|
printk("STALLION: invalid irq=%d for brd=%d\n",
|
||
|
brdp->irq, brdp->brdnr);
|
||
|
return(-EINVAL);
|
||
|
}
|
||
|
status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
|
||
|
status |= (stl_vecmap[brdp->irq] << 1);
|
||
|
outb((status | ECH_BRDRESET), brdp->ioaddr1);
|
||
|
brdp->ioctrlval = ECH_INTENABLE |
|
||
|
((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
|
||
|
for (i = 0; (i < 10); i++)
|
||
|
outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
|
||
|
brdp->iosize1 = 2;
|
||
|
brdp->iosize2 = 32;
|
||
|
name = "serial(EC8/32)";
|
||
|
outb(status, brdp->ioaddr1);
|
||
|
break;
|
||
|
|
||
|
case BRD_ECHMC:
|
||
|
brdp->isr = stl_echmcaintr;
|
||
|
brdp->ioctrl = brdp->ioaddr1 + 0x20;
|
||
|
brdp->iostatus = brdp->ioctrl;
|
||
|
status = inb(brdp->iostatus);
|
||
|
if ((status & ECH_IDBITMASK) != ECH_ID)
|
||
|
return(-ENODEV);
|
||
|
if ((brdp->irq < 0) || (brdp->irq > 15) ||
|
||
|
(stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
|
||
|
printk("STALLION: invalid irq=%d for brd=%d\n",
|
||
|
brdp->irq, brdp->brdnr);
|
||
|
return(-EINVAL);
|
||
|
}
|
||
|
outb(ECHMC_BRDRESET, brdp->ioctrl);
|
||
|
outb(ECHMC_INTENABLE, brdp->ioctrl);
|
||
|
brdp->iosize1 = 64;
|
||
|
name = "serial(EC8/32-MC)";
|
||
|
break;
|
||
|
|
||
|
case BRD_ECHPCI:
|
||
|
brdp->isr = stl_echpciintr;
|
||
|
brdp->ioctrl = brdp->ioaddr1 + 2;
|
||
|
brdp->iosize1 = 4;
|
||
|
brdp->iosize2 = 8;
|
||
|
name = "serial(EC8/32-PCI)";
|
||
|
break;
|
||
|
|
||
|
case BRD_ECH64PCI:
|
||
|
brdp->isr = stl_echpci64intr;
|
||
|
brdp->ioctrl = brdp->ioaddr2 + 0x40;
|
||
|
outb(0x43, (brdp->ioaddr1 + 0x4c));
|
||
|
brdp->iosize1 = 0x80;
|
||
|
brdp->iosize2 = 0x80;
|
||
|
name = "serial(EC8/64-PCI)";
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
printk("STALLION: unknown board type=%d\n", brdp->brdtype);
|
||
|
return(-EINVAL);
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Check boards for possible IO address conflicts and return fail status
|
||
|
* if an IO conflict found.
|
||
|
*/
|
||
|
if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
|
||
|
printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
|
||
|
"%x conflicts with another device\n", brdp->brdnr,
|
||
|
brdp->ioaddr1);
|
||
|
return(-EBUSY);
|
||
|
}
|
||
|
|
||
|
if (brdp->iosize2 > 0)
|
||
|
if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
|
||
|
printk(KERN_WARNING "STALLION: Warning, board %d I/O "
|
||
|
"address %x conflicts with another device\n",
|
||
|
brdp->brdnr, brdp->ioaddr2);
|
||
|
printk(KERN_WARNING "STALLION: Warning, also "
|
||
|
"releasing board %d I/O address %x \n",
|
||
|
brdp->brdnr, brdp->ioaddr1);
|
||
|
release_region(brdp->ioaddr1, brdp->iosize1);
|
||
|
return(-EBUSY);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Scan through the secondary io address space looking for panels.
|
||
|
* As we find'em allocate and initialize panel structures for each.
|
||
|
*/
|
||
|
brdp->clk = CD1400_CLK;
|
||
|
brdp->hwid = status;
|
||
|
|
||
|
ioaddr = brdp->ioaddr2;
|
||
|
banknr = 0;
|
||
|
panelnr = 0;
|
||
|
nxtid = 0;
|
||
|
|
||
|
for (i = 0; (i < STL_MAXPANELS); i++) {
|
||
|
if (brdp->brdtype == BRD_ECHPCI) {
|
||
|
outb(nxtid, brdp->ioctrl);
|
||
|
ioaddr = brdp->ioaddr2;
|
||
|
}
|
||
|
status = inb(ioaddr + ECH_PNLSTATUS);
|
||
|
if ((status & ECH_PNLIDMASK) != nxtid)
|
||
|
break;
|
||
|
panelp = (stlpanel_t *) stl_memalloc(sizeof(stlpanel_t));
|
||
|
if (panelp == (stlpanel_t *) NULL) {
|
||
|
printk("STALLION: failed to allocate memory "
|
||
|
"(size=%d)\n", sizeof(stlpanel_t));
|
||
|
break;
|
||
|
}
|
||
|
memset(panelp, 0, sizeof(stlpanel_t));
|
||
|
panelp->magic = STL_PANELMAGIC;
|
||
|
panelp->brdnr = brdp->brdnr;
|
||
|
panelp->panelnr = panelnr;
|
||
|
panelp->iobase = ioaddr;
|
||
|
panelp->pagenr = nxtid;
|
||
|
panelp->hwid = status;
|
||
|
brdp->bnk2panel[banknr] = panelp;
|
||
|
brdp->bnkpageaddr[banknr] = nxtid;
|
||
|
brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
|
||
|
|
||
|
if (status & ECH_PNLXPID) {
|
||
|
panelp->uartp = (void *) &stl_sc26198uart;
|
||
|
panelp->isr = stl_sc26198intr;
|
||
|
if (status & ECH_PNL16PORT) {
|
||
|
panelp->nrports = 16;
|
||
|
brdp->bnk2panel[banknr] = panelp;
|
||
|
brdp->bnkpageaddr[banknr] = nxtid;
|
||
|
brdp->bnkstataddr[banknr++] = ioaddr + 4 +
|
||
|
ECH_PNLSTATUS;
|
||
|
} else {
|
||
|
panelp->nrports = 8;
|
||
|
}
|
||
|
} else {
|
||
|
panelp->uartp = (void *) &stl_cd1400uart;
|
||
|
panelp->isr = stl_cd1400echintr;
|
||
|
if (status & ECH_PNL16PORT) {
|
||
|
panelp->nrports = 16;
|
||
|
panelp->ackmask = 0x80;
|
||
|
if (brdp->brdtype != BRD_ECHPCI)
|
||
|
ioaddr += EREG_BANKSIZE;
|
||
|
brdp->bnk2panel[banknr] = panelp;
|
||
|
brdp->bnkpageaddr[banknr] = ++nxtid;
|
||
|
brdp->bnkstataddr[banknr++] = ioaddr +
|
||
|
ECH_PNLSTATUS;
|
||
|
} else {
|
||
|
panelp->nrports = 8;
|
||
|
panelp->ackmask = 0xc0;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
nxtid++;
|
||
|
ioaddr += EREG_BANKSIZE;
|
||
|
brdp->nrports += panelp->nrports;
|
||
|
brdp->panels[panelnr++] = panelp;
|
||
|
if ((brdp->brdtype != BRD_ECHPCI) &&
|
||
|
(ioaddr >= (brdp->ioaddr2 + brdp->iosize2)))
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
brdp->nrpanels = panelnr;
|
||
|
brdp->nrbnks = banknr;
|
||
|
if (brdp->brdtype == BRD_ECH)
|
||
|
outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
|
||
|
|
||
|
brdp->state |= BRD_FOUND;
|
||
|
if (request_irq(brdp->irq, stl_intr, SA_SHIRQ, name, brdp) != 0) {
|
||
|
printk("STALLION: failed to register interrupt "
|
||
|
"routine for %s irq=%d\n", name, brdp->irq);
|
||
|
i = -ENODEV;
|
||
|
} else {
|
||
|
i = 0;
|
||
|
}
|
||
|
|
||
|
return(i);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Initialize and configure the specified board.
|
||
|
* Scan through all the boards in the configuration and see what we
|
||
|
* can find. Handle EIO and the ECH boards a little differently here
|
||
|
* since the initial search and setup is very different.
|
||
|
*/
|
||
|
|
||
|
static int __init stl_brdinit(stlbrd_t *brdp)
|
||
|
{
|
||
|
int i;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_brdinit(brdp=%x)\n", (int) brdp);
|
||
|
#endif
|
||
|
|
||
|
switch (brdp->brdtype) {
|
||
|
case BRD_EASYIO:
|
||
|
case BRD_EASYIOPCI:
|
||
|
stl_initeio(brdp);
|
||
|
break;
|
||
|
case BRD_ECH:
|
||
|
case BRD_ECHMC:
|
||
|
case BRD_ECHPCI:
|
||
|
case BRD_ECH64PCI:
|
||
|
stl_initech(brdp);
|
||
|
break;
|
||
|
default:
|
||
|
printk("STALLION: board=%d is unknown board type=%d\n",
|
||
|
brdp->brdnr, brdp->brdtype);
|
||
|
return(ENODEV);
|
||
|
}
|
||
|
|
||
|
stl_brds[brdp->brdnr] = brdp;
|
||
|
if ((brdp->state & BRD_FOUND) == 0) {
|
||
|
printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
|
||
|
stl_brdnames[brdp->brdtype], brdp->brdnr,
|
||
|
brdp->ioaddr1, brdp->irq);
|
||
|
return(ENODEV);
|
||
|
}
|
||
|
|
||
|
for (i = 0; (i < STL_MAXPANELS); i++)
|
||
|
if (brdp->panels[i] != (stlpanel_t *) NULL)
|
||
|
stl_initports(brdp, brdp->panels[i]);
|
||
|
|
||
|
printk("STALLION: %s found, board=%d io=%x irq=%d "
|
||
|
"nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype],
|
||
|
brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels,
|
||
|
brdp->nrports);
|
||
|
return(0);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Find the next available board number that is free.
|
||
|
*/
|
||
|
|
||
|
static inline int stl_getbrdnr(void)
|
||
|
{
|
||
|
int i;
|
||
|
|
||
|
for (i = 0; (i < STL_MAXBRDS); i++) {
|
||
|
if (stl_brds[i] == (stlbrd_t *) NULL) {
|
||
|
if (i >= stl_nrbrds)
|
||
|
stl_nrbrds = i + 1;
|
||
|
return(i);
|
||
|
}
|
||
|
}
|
||
|
return(-1);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
#ifdef CONFIG_PCI
|
||
|
|
||
|
/*
|
||
|
* We have a Stallion board. Allocate a board structure and
|
||
|
* initialize it. Read its IO and IRQ resources from PCI
|
||
|
* configuration space.
|
||
|
*/
|
||
|
|
||
|
static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp)
|
||
|
{
|
||
|
stlbrd_t *brdp;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_initpcibrd(brdtype=%d,busnr=%x,devnr=%x)\n", brdtype,
|
||
|
devp->bus->number, devp->devfn);
|
||
|
#endif
|
||
|
|
||
|
if (pci_enable_device(devp))
|
||
|
return(-EIO);
|
||
|
if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL)
|
||
|
return(-ENOMEM);
|
||
|
if ((brdp->brdnr = stl_getbrdnr()) < 0) {
|
||
|
printk("STALLION: too many boards found, "
|
||
|
"maximum supported %d\n", STL_MAXBRDS);
|
||
|
return(0);
|
||
|
}
|
||
|
brdp->brdtype = brdtype;
|
||
|
|
||
|
/*
|
||
|
* Different Stallion boards use the BAR registers in different ways,
|
||
|
* so set up io addresses based on board type.
|
||
|
*/
|
||
|
#ifdef DEBUG
|
||
|
printk("%s(%d): BAR[]=%x,%x,%x,%x IRQ=%x\n", __FILE__, __LINE__,
|
||
|
pci_resource_start(devp, 0), pci_resource_start(devp, 1),
|
||
|
pci_resource_start(devp, 2), pci_resource_start(devp, 3), devp->irq);
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* We have all resources from the board, so let's setup the actual
|
||
|
* board structure now.
|
||
|
*/
|
||
|
switch (brdtype) {
|
||
|
case BRD_ECHPCI:
|
||
|
brdp->ioaddr2 = pci_resource_start(devp, 0);
|
||
|
brdp->ioaddr1 = pci_resource_start(devp, 1);
|
||
|
break;
|
||
|
case BRD_ECH64PCI:
|
||
|
brdp->ioaddr2 = pci_resource_start(devp, 2);
|
||
|
brdp->ioaddr1 = pci_resource_start(devp, 1);
|
||
|
break;
|
||
|
case BRD_EASYIOPCI:
|
||
|
brdp->ioaddr1 = pci_resource_start(devp, 2);
|
||
|
brdp->ioaddr2 = pci_resource_start(devp, 1);
|
||
|
break;
|
||
|
default:
|
||
|
printk("STALLION: unknown PCI board type=%d\n", brdtype);
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
brdp->irq = devp->irq;
|
||
|
stl_brdinit(brdp);
|
||
|
|
||
|
return(0);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Find all Stallion PCI boards that might be installed. Initialize each
|
||
|
* one as it is found.
|
||
|
*/
|
||
|
|
||
|
|
||
|
static inline int stl_findpcibrds(void)
|
||
|
{
|
||
|
struct pci_dev *dev = NULL;
|
||
|
int i, rc;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_findpcibrds()\n");
|
||
|
#endif
|
||
|
|
||
|
for (i = 0; (i < stl_nrpcibrds); i++)
|
||
|
while ((dev = pci_find_device(stl_pcibrds[i].vendid,
|
||
|
stl_pcibrds[i].devid, dev))) {
|
||
|
|
||
|
/*
|
||
|
* Found a device on the PCI bus that has our vendor and
|
||
|
* device ID. Need to check now that it is really us.
|
||
|
*/
|
||
|
if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
|
||
|
continue;
|
||
|
|
||
|
rc = stl_initpcibrd(stl_pcibrds[i].brdtype, dev);
|
||
|
if (rc)
|
||
|
return(rc);
|
||
|
}
|
||
|
|
||
|
return(0);
|
||
|
}
|
||
|
|
||
|
#endif
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Scan through all the boards in the configuration and see what we
|
||
|
* can find. Handle EIO and the ECH boards a little differently here
|
||
|
* since the initial search and setup is too different.
|
||
|
*/
|
||
|
|
||
|
static inline int stl_initbrds(void)
|
||
|
{
|
||
|
stlbrd_t *brdp;
|
||
|
stlconf_t *confp;
|
||
|
int i;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_initbrds()\n");
|
||
|
#endif
|
||
|
|
||
|
if (stl_nrbrds > STL_MAXBRDS) {
|
||
|
printk("STALLION: too many boards in configuration table, "
|
||
|
"truncating to %d\n", STL_MAXBRDS);
|
||
|
stl_nrbrds = STL_MAXBRDS;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Firstly scan the list of static boards configured. Allocate
|
||
|
* resources and initialize the boards as found.
|
||
|
*/
|
||
|
for (i = 0; (i < stl_nrbrds); i++) {
|
||
|
confp = &stl_brdconf[i];
|
||
|
stl_parsebrd(confp, stl_brdsp[i]);
|
||
|
if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL)
|
||
|
return(-ENOMEM);
|
||
|
brdp->brdnr = i;
|
||
|
brdp->brdtype = confp->brdtype;
|
||
|
brdp->ioaddr1 = confp->ioaddr1;
|
||
|
brdp->ioaddr2 = confp->ioaddr2;
|
||
|
brdp->irq = confp->irq;
|
||
|
brdp->irqtype = confp->irqtype;
|
||
|
stl_brdinit(brdp);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Find any dynamically supported boards. That is via module load
|
||
|
* line options or auto-detected on the PCI bus.
|
||
|
*/
|
||
|
stl_argbrds();
|
||
|
#ifdef CONFIG_PCI
|
||
|
stl_findpcibrds();
|
||
|
#endif
|
||
|
|
||
|
return(0);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Return the board stats structure to user app.
|
||
|
*/
|
||
|
|
||
|
static int stl_getbrdstats(combrd_t __user *bp)
|
||
|
{
|
||
|
stlbrd_t *brdp;
|
||
|
stlpanel_t *panelp;
|
||
|
int i;
|
||
|
|
||
|
if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t)))
|
||
|
return -EFAULT;
|
||
|
if (stl_brdstats.brd >= STL_MAXBRDS)
|
||
|
return(-ENODEV);
|
||
|
brdp = stl_brds[stl_brdstats.brd];
|
||
|
if (brdp == (stlbrd_t *) NULL)
|
||
|
return(-ENODEV);
|
||
|
|
||
|
memset(&stl_brdstats, 0, sizeof(combrd_t));
|
||
|
stl_brdstats.brd = brdp->brdnr;
|
||
|
stl_brdstats.type = brdp->brdtype;
|
||
|
stl_brdstats.hwid = brdp->hwid;
|
||
|
stl_brdstats.state = brdp->state;
|
||
|
stl_brdstats.ioaddr = brdp->ioaddr1;
|
||
|
stl_brdstats.ioaddr2 = brdp->ioaddr2;
|
||
|
stl_brdstats.irq = brdp->irq;
|
||
|
stl_brdstats.nrpanels = brdp->nrpanels;
|
||
|
stl_brdstats.nrports = brdp->nrports;
|
||
|
for (i = 0; (i < brdp->nrpanels); i++) {
|
||
|
panelp = brdp->panels[i];
|
||
|
stl_brdstats.panels[i].panel = i;
|
||
|
stl_brdstats.panels[i].hwid = panelp->hwid;
|
||
|
stl_brdstats.panels[i].nrports = panelp->nrports;
|
||
|
}
|
||
|
|
||
|
return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0;
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Resolve the referenced port number into a port struct pointer.
|
||
|
*/
|
||
|
|
||
|
static stlport_t *stl_getport(int brdnr, int panelnr, int portnr)
|
||
|
{
|
||
|
stlbrd_t *brdp;
|
||
|
stlpanel_t *panelp;
|
||
|
|
||
|
if ((brdnr < 0) || (brdnr >= STL_MAXBRDS))
|
||
|
return((stlport_t *) NULL);
|
||
|
brdp = stl_brds[brdnr];
|
||
|
if (brdp == (stlbrd_t *) NULL)
|
||
|
return((stlport_t *) NULL);
|
||
|
if ((panelnr < 0) || (panelnr >= brdp->nrpanels))
|
||
|
return((stlport_t *) NULL);
|
||
|
panelp = brdp->panels[panelnr];
|
||
|
if (panelp == (stlpanel_t *) NULL)
|
||
|
return((stlport_t *) NULL);
|
||
|
if ((portnr < 0) || (portnr >= panelp->nrports))
|
||
|
return((stlport_t *) NULL);
|
||
|
return(panelp->ports[portnr]);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Return the port stats structure to user app. A NULL port struct
|
||
|
* pointer passed in means that we need to find out from the app
|
||
|
* what port to get stats for (used through board control device).
|
||
|
*/
|
||
|
|
||
|
static int stl_getportstats(stlport_t *portp, comstats_t __user *cp)
|
||
|
{
|
||
|
unsigned char *head, *tail;
|
||
|
unsigned long flags;
|
||
|
|
||
|
if (!portp) {
|
||
|
if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
|
||
|
return -EFAULT;
|
||
|
portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
|
||
|
stl_comstats.port);
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return(-ENODEV);
|
||
|
}
|
||
|
|
||
|
portp->stats.state = portp->istate;
|
||
|
portp->stats.flags = portp->flags;
|
||
|
portp->stats.hwid = portp->hwid;
|
||
|
|
||
|
portp->stats.ttystate = 0;
|
||
|
portp->stats.cflags = 0;
|
||
|
portp->stats.iflags = 0;
|
||
|
portp->stats.oflags = 0;
|
||
|
portp->stats.lflags = 0;
|
||
|
portp->stats.rxbuffered = 0;
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
if (portp->tty != (struct tty_struct *) NULL) {
|
||
|
if (portp->tty->driver_data == portp) {
|
||
|
portp->stats.ttystate = portp->tty->flags;
|
||
|
portp->stats.rxbuffered = portp->tty->flip.count;
|
||
|
if (portp->tty->termios != (struct termios *) NULL) {
|
||
|
portp->stats.cflags = portp->tty->termios->c_cflag;
|
||
|
portp->stats.iflags = portp->tty->termios->c_iflag;
|
||
|
portp->stats.oflags = portp->tty->termios->c_oflag;
|
||
|
portp->stats.lflags = portp->tty->termios->c_lflag;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
restore_flags(flags);
|
||
|
|
||
|
head = portp->tx.head;
|
||
|
tail = portp->tx.tail;
|
||
|
portp->stats.txbuffered = ((head >= tail) ? (head - tail) :
|
||
|
(STL_TXBUFSIZE - (tail - head)));
|
||
|
|
||
|
portp->stats.signals = (unsigned long) stl_getsignals(portp);
|
||
|
|
||
|
return copy_to_user(cp, &portp->stats,
|
||
|
sizeof(comstats_t)) ? -EFAULT : 0;
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Clear the port stats structure. We also return it zeroed out...
|
||
|
*/
|
||
|
|
||
|
static int stl_clrportstats(stlport_t *portp, comstats_t __user *cp)
|
||
|
{
|
||
|
if (!portp) {
|
||
|
if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
|
||
|
return -EFAULT;
|
||
|
portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
|
||
|
stl_comstats.port);
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return(-ENODEV);
|
||
|
}
|
||
|
|
||
|
memset(&portp->stats, 0, sizeof(comstats_t));
|
||
|
portp->stats.brd = portp->brdnr;
|
||
|
portp->stats.panel = portp->panelnr;
|
||
|
portp->stats.port = portp->portnr;
|
||
|
return copy_to_user(cp, &portp->stats,
|
||
|
sizeof(comstats_t)) ? -EFAULT : 0;
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Return the entire driver ports structure to a user app.
|
||
|
*/
|
||
|
|
||
|
static int stl_getportstruct(stlport_t __user *arg)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
|
||
|
if (copy_from_user(&stl_dummyport, arg, sizeof(stlport_t)))
|
||
|
return -EFAULT;
|
||
|
portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
|
||
|
stl_dummyport.portnr);
|
||
|
if (!portp)
|
||
|
return -ENODEV;
|
||
|
return copy_to_user(arg, portp, sizeof(stlport_t)) ? -EFAULT : 0;
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Return the entire driver board structure to a user app.
|
||
|
*/
|
||
|
|
||
|
static int stl_getbrdstruct(stlbrd_t __user *arg)
|
||
|
{
|
||
|
stlbrd_t *brdp;
|
||
|
|
||
|
if (copy_from_user(&stl_dummybrd, arg, sizeof(stlbrd_t)))
|
||
|
return -EFAULT;
|
||
|
if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS))
|
||
|
return -ENODEV;
|
||
|
brdp = stl_brds[stl_dummybrd.brdnr];
|
||
|
if (!brdp)
|
||
|
return(-ENODEV);
|
||
|
return copy_to_user(arg, brdp, sizeof(stlbrd_t)) ? -EFAULT : 0;
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* The "staliomem" device is also required to do some special operations
|
||
|
* on the board and/or ports. In this driver it is mostly used for stats
|
||
|
* collection.
|
||
|
*/
|
||
|
|
||
|
static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
|
||
|
{
|
||
|
int brdnr, rc;
|
||
|
void __user *argp = (void __user *)arg;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_memioctl(ip=%x,fp=%x,cmd=%x,arg=%x)\n", (int) ip,
|
||
|
(int) fp, cmd, (int) arg);
|
||
|
#endif
|
||
|
|
||
|
brdnr = iminor(ip);
|
||
|
if (brdnr >= STL_MAXBRDS)
|
||
|
return(-ENODEV);
|
||
|
rc = 0;
|
||
|
|
||
|
switch (cmd) {
|
||
|
case COM_GETPORTSTATS:
|
||
|
rc = stl_getportstats(NULL, argp);
|
||
|
break;
|
||
|
case COM_CLRPORTSTATS:
|
||
|
rc = stl_clrportstats(NULL, argp);
|
||
|
break;
|
||
|
case COM_GETBRDSTATS:
|
||
|
rc = stl_getbrdstats(argp);
|
||
|
break;
|
||
|
case COM_READPORT:
|
||
|
rc = stl_getportstruct(argp);
|
||
|
break;
|
||
|
case COM_READBOARD:
|
||
|
rc = stl_getbrdstruct(argp);
|
||
|
break;
|
||
|
default:
|
||
|
rc = -ENOIOCTLCMD;
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
return(rc);
|
||
|
}
|
||
|
|
||
|
static struct tty_operations stl_ops = {
|
||
|
.open = stl_open,
|
||
|
.close = stl_close,
|
||
|
.write = stl_write,
|
||
|
.put_char = stl_putchar,
|
||
|
.flush_chars = stl_flushchars,
|
||
|
.write_room = stl_writeroom,
|
||
|
.chars_in_buffer = stl_charsinbuffer,
|
||
|
.ioctl = stl_ioctl,
|
||
|
.set_termios = stl_settermios,
|
||
|
.throttle = stl_throttle,
|
||
|
.unthrottle = stl_unthrottle,
|
||
|
.stop = stl_stop,
|
||
|
.start = stl_start,
|
||
|
.hangup = stl_hangup,
|
||
|
.flush_buffer = stl_flushbuffer,
|
||
|
.break_ctl = stl_breakctl,
|
||
|
.wait_until_sent = stl_waituntilsent,
|
||
|
.send_xchar = stl_sendxchar,
|
||
|
.read_proc = stl_readproc,
|
||
|
.tiocmget = stl_tiocmget,
|
||
|
.tiocmset = stl_tiocmset,
|
||
|
};
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
int __init stl_init(void)
|
||
|
{
|
||
|
int i;
|
||
|
printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
|
||
|
|
||
|
stl_initbrds();
|
||
|
|
||
|
stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
|
||
|
if (!stl_serial)
|
||
|
return -1;
|
||
|
|
||
|
/*
|
||
|
* Allocate a temporary write buffer.
|
||
|
*/
|
||
|
stl_tmpwritebuf = (char *) stl_memalloc(STL_TXBUFSIZE);
|
||
|
if (stl_tmpwritebuf == (char *) NULL)
|
||
|
printk("STALLION: failed to allocate memory (size=%d)\n",
|
||
|
STL_TXBUFSIZE);
|
||
|
|
||
|
/*
|
||
|
* Set up a character driver for per board stuff. This is mainly used
|
||
|
* to do stats ioctls on the ports.
|
||
|
*/
|
||
|
if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
|
||
|
printk("STALLION: failed to register serial board device\n");
|
||
|
devfs_mk_dir("staliomem");
|
||
|
|
||
|
stallion_class = class_simple_create(THIS_MODULE, "staliomem");
|
||
|
for (i = 0; i < 4; i++) {
|
||
|
devfs_mk_cdev(MKDEV(STL_SIOMEMMAJOR, i),
|
||
|
S_IFCHR|S_IRUSR|S_IWUSR,
|
||
|
"staliomem/%d", i);
|
||
|
class_simple_device_add(stallion_class, MKDEV(STL_SIOMEMMAJOR, i), NULL, "staliomem%d", i);
|
||
|
}
|
||
|
|
||
|
stl_serial->owner = THIS_MODULE;
|
||
|
stl_serial->driver_name = stl_drvname;
|
||
|
stl_serial->name = "ttyE";
|
||
|
stl_serial->devfs_name = "tts/E";
|
||
|
stl_serial->major = STL_SERIALMAJOR;
|
||
|
stl_serial->minor_start = 0;
|
||
|
stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
|
||
|
stl_serial->subtype = SERIAL_TYPE_NORMAL;
|
||
|
stl_serial->init_termios = stl_deftermios;
|
||
|
stl_serial->flags = TTY_DRIVER_REAL_RAW;
|
||
|
tty_set_operations(stl_serial, &stl_ops);
|
||
|
|
||
|
if (tty_register_driver(stl_serial)) {
|
||
|
put_tty_driver(stl_serial);
|
||
|
printk("STALLION: failed to register serial driver\n");
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
return(0);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
/* CD1400 HARDWARE FUNCTIONS */
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* These functions get/set/update the registers of the cd1400 UARTs.
|
||
|
* Access to the cd1400 registers is via an address/data io port pair.
|
||
|
* (Maybe should make this inline...)
|
||
|
*/
|
||
|
|
||
|
static int stl_cd1400getreg(stlport_t *portp, int regnr)
|
||
|
{
|
||
|
outb((regnr + portp->uartaddr), portp->ioaddr);
|
||
|
return(inb(portp->ioaddr + EREG_DATA));
|
||
|
}
|
||
|
|
||
|
static void stl_cd1400setreg(stlport_t *portp, int regnr, int value)
|
||
|
{
|
||
|
outb((regnr + portp->uartaddr), portp->ioaddr);
|
||
|
outb(value, portp->ioaddr + EREG_DATA);
|
||
|
}
|
||
|
|
||
|
static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value)
|
||
|
{
|
||
|
outb((regnr + portp->uartaddr), portp->ioaddr);
|
||
|
if (inb(portp->ioaddr + EREG_DATA) != value) {
|
||
|
outb(value, portp->ioaddr + EREG_DATA);
|
||
|
return(1);
|
||
|
}
|
||
|
return(0);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Inbitialize the UARTs in a panel. We don't care what sort of board
|
||
|
* these ports are on - since the port io registers are almost
|
||
|
* identical when dealing with ports.
|
||
|
*/
|
||
|
|
||
|
static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp)
|
||
|
{
|
||
|
unsigned int gfrcr;
|
||
|
int chipmask, i, j;
|
||
|
int nrchips, uartaddr, ioaddr;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_panelinit(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp);
|
||
|
#endif
|
||
|
|
||
|
BRDENABLE(panelp->brdnr, panelp->pagenr);
|
||
|
|
||
|
/*
|
||
|
* Check that each chip is present and started up OK.
|
||
|
*/
|
||
|
chipmask = 0;
|
||
|
nrchips = panelp->nrports / CD1400_PORTS;
|
||
|
for (i = 0; (i < nrchips); i++) {
|
||
|
if (brdp->brdtype == BRD_ECHPCI) {
|
||
|
outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
|
||
|
ioaddr = panelp->iobase;
|
||
|
} else {
|
||
|
ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
|
||
|
}
|
||
|
uartaddr = (i & 0x01) ? 0x080 : 0;
|
||
|
outb((GFRCR + uartaddr), ioaddr);
|
||
|
outb(0, (ioaddr + EREG_DATA));
|
||
|
outb((CCR + uartaddr), ioaddr);
|
||
|
outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
|
||
|
outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
|
||
|
outb((GFRCR + uartaddr), ioaddr);
|
||
|
for (j = 0; (j < CCR_MAXWAIT); j++) {
|
||
|
if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
|
||
|
break;
|
||
|
}
|
||
|
if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
|
||
|
printk("STALLION: cd1400 not responding, "
|
||
|
"brd=%d panel=%d chip=%d\n",
|
||
|
panelp->brdnr, panelp->panelnr, i);
|
||
|
continue;
|
||
|
}
|
||
|
chipmask |= (0x1 << i);
|
||
|
outb((PPR + uartaddr), ioaddr);
|
||
|
outb(PPR_SCALAR, (ioaddr + EREG_DATA));
|
||
|
}
|
||
|
|
||
|
BRDDISABLE(panelp->brdnr);
|
||
|
return(chipmask);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Initialize hardware specific port registers.
|
||
|
*/
|
||
|
|
||
|
static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp)
|
||
|
{
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_cd1400portinit(brdp=%x,panelp=%x,portp=%x)\n",
|
||
|
(int) brdp, (int) panelp, (int) portp);
|
||
|
#endif
|
||
|
|
||
|
if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) ||
|
||
|
(portp == (stlport_t *) NULL))
|
||
|
return;
|
||
|
|
||
|
portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
|
||
|
(portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
|
||
|
portp->uartaddr = (portp->portnr & 0x04) << 5;
|
||
|
portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
|
||
|
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
|
||
|
stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
|
||
|
portp->hwid = stl_cd1400getreg(portp, GFRCR);
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Wait for the command register to be ready. We will poll this,
|
||
|
* since it won't usually take too long to be ready.
|
||
|
*/
|
||
|
|
||
|
static void stl_cd1400ccrwait(stlport_t *portp)
|
||
|
{
|
||
|
int i;
|
||
|
|
||
|
for (i = 0; (i < CCR_MAXWAIT); i++) {
|
||
|
if (stl_cd1400getreg(portp, CCR) == 0) {
|
||
|
return;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
|
||
|
portp->portnr, portp->panelnr, portp->brdnr);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Set up the cd1400 registers for a port based on the termios port
|
||
|
* settings.
|
||
|
*/
|
||
|
|
||
|
static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp)
|
||
|
{
|
||
|
stlbrd_t *brdp;
|
||
|
unsigned long flags;
|
||
|
unsigned int clkdiv, baudrate;
|
||
|
unsigned char cor1, cor2, cor3;
|
||
|
unsigned char cor4, cor5, ccr;
|
||
|
unsigned char srer, sreron, sreroff;
|
||
|
unsigned char mcor1, mcor2, rtpr;
|
||
|
unsigned char clk, div;
|
||
|
|
||
|
cor1 = 0;
|
||
|
cor2 = 0;
|
||
|
cor3 = 0;
|
||
|
cor4 = 0;
|
||
|
cor5 = 0;
|
||
|
ccr = 0;
|
||
|
rtpr = 0;
|
||
|
clk = 0;
|
||
|
div = 0;
|
||
|
mcor1 = 0;
|
||
|
mcor2 = 0;
|
||
|
sreron = 0;
|
||
|
sreroff = 0;
|
||
|
|
||
|
brdp = stl_brds[portp->brdnr];
|
||
|
if (brdp == (stlbrd_t *) NULL)
|
||
|
return;
|
||
|
|
||
|
/*
|
||
|
* Set up the RX char ignore mask with those RX error types we
|
||
|
* can ignore. We can get the cd1400 to help us out a little here,
|
||
|
* it will ignore parity errors and breaks for us.
|
||
|
*/
|
||
|
portp->rxignoremsk = 0;
|
||
|
if (tiosp->c_iflag & IGNPAR) {
|
||
|
portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
|
||
|
cor1 |= COR1_PARIGNORE;
|
||
|
}
|
||
|
if (tiosp->c_iflag & IGNBRK) {
|
||
|
portp->rxignoremsk |= ST_BREAK;
|
||
|
cor4 |= COR4_IGNBRK;
|
||
|
}
|
||
|
|
||
|
portp->rxmarkmsk = ST_OVERRUN;
|
||
|
if (tiosp->c_iflag & (INPCK | PARMRK))
|
||
|
portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
|
||
|
if (tiosp->c_iflag & BRKINT)
|
||
|
portp->rxmarkmsk |= ST_BREAK;
|
||
|
|
||
|
/*
|
||
|
* Go through the char size, parity and stop bits and set all the
|
||
|
* option register appropriately.
|
||
|
*/
|
||
|
switch (tiosp->c_cflag & CSIZE) {
|
||
|
case CS5:
|
||
|
cor1 |= COR1_CHL5;
|
||
|
break;
|
||
|
case CS6:
|
||
|
cor1 |= COR1_CHL6;
|
||
|
break;
|
||
|
case CS7:
|
||
|
cor1 |= COR1_CHL7;
|
||
|
break;
|
||
|
default:
|
||
|
cor1 |= COR1_CHL8;
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
if (tiosp->c_cflag & CSTOPB)
|
||
|
cor1 |= COR1_STOP2;
|
||
|
else
|
||
|
cor1 |= COR1_STOP1;
|
||
|
|
||
|
if (tiosp->c_cflag & PARENB) {
|
||
|
if (tiosp->c_cflag & PARODD)
|
||
|
cor1 |= (COR1_PARENB | COR1_PARODD);
|
||
|
else
|
||
|
cor1 |= (COR1_PARENB | COR1_PAREVEN);
|
||
|
} else {
|
||
|
cor1 |= COR1_PARNONE;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
|
||
|
* space for hardware flow control and the like. This should be set to
|
||
|
* VMIN. Also here we will set the RX data timeout to 10ms - this should
|
||
|
* really be based on VTIME.
|
||
|
*/
|
||
|
cor3 |= FIFO_RXTHRESHOLD;
|
||
|
rtpr = 2;
|
||
|
|
||
|
/*
|
||
|
* Calculate the baud rate timers. For now we will just assume that
|
||
|
* the input and output baud are the same. Could have used a baud
|
||
|
* table here, but this way we can generate virtually any baud rate
|
||
|
* we like!
|
||
|
*/
|
||
|
baudrate = tiosp->c_cflag & CBAUD;
|
||
|
if (baudrate & CBAUDEX) {
|
||
|
baudrate &= ~CBAUDEX;
|
||
|
if ((baudrate < 1) || (baudrate > 4))
|
||
|
tiosp->c_cflag &= ~CBAUDEX;
|
||
|
else
|
||
|
baudrate += 15;
|
||
|
}
|
||
|
baudrate = stl_baudrates[baudrate];
|
||
|
if ((tiosp->c_cflag & CBAUD) == B38400) {
|
||
|
if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
|
||
|
baudrate = 57600;
|
||
|
else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
|
||
|
baudrate = 115200;
|
||
|
else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
|
||
|
baudrate = 230400;
|
||
|
else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
|
||
|
baudrate = 460800;
|
||
|
else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
|
||
|
baudrate = (portp->baud_base / portp->custom_divisor);
|
||
|
}
|
||
|
if (baudrate > STL_CD1400MAXBAUD)
|
||
|
baudrate = STL_CD1400MAXBAUD;
|
||
|
|
||
|
if (baudrate > 0) {
|
||
|
for (clk = 0; (clk < CD1400_NUMCLKS); clk++) {
|
||
|
clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate);
|
||
|
if (clkdiv < 0x100)
|
||
|
break;
|
||
|
}
|
||
|
div = (unsigned char) clkdiv;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Check what form of modem signaling is required and set it up.
|
||
|
*/
|
||
|
if ((tiosp->c_cflag & CLOCAL) == 0) {
|
||
|
mcor1 |= MCOR1_DCD;
|
||
|
mcor2 |= MCOR2_DCD;
|
||
|
sreron |= SRER_MODEM;
|
||
|
portp->flags |= ASYNC_CHECK_CD;
|
||
|
} else {
|
||
|
portp->flags &= ~ASYNC_CHECK_CD;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Setup cd1400 enhanced modes if we can. In particular we want to
|
||
|
* handle as much of the flow control as possible automatically. As
|
||
|
* well as saving a few CPU cycles it will also greatly improve flow
|
||
|
* control reliability.
|
||
|
*/
|
||
|
if (tiosp->c_iflag & IXON) {
|
||
|
cor2 |= COR2_TXIBE;
|
||
|
cor3 |= COR3_SCD12;
|
||
|
if (tiosp->c_iflag & IXANY)
|
||
|
cor2 |= COR2_IXM;
|
||
|
}
|
||
|
|
||
|
if (tiosp->c_cflag & CRTSCTS) {
|
||
|
cor2 |= COR2_CTSAE;
|
||
|
mcor1 |= FIFO_RTSTHRESHOLD;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* All cd1400 register values calculated so go through and set
|
||
|
* them all up.
|
||
|
*/
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
|
||
|
portp->portnr, portp->panelnr, portp->brdnr);
|
||
|
printk(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
|
||
|
cor1, cor2, cor3, cor4, cor5);
|
||
|
printk(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
|
||
|
mcor1, mcor2, rtpr, sreron, sreroff);
|
||
|
printk(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
|
||
|
printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
|
||
|
tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
|
||
|
tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
|
||
|
#endif
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
|
||
|
srer = stl_cd1400getreg(portp, SRER);
|
||
|
stl_cd1400setreg(portp, SRER, 0);
|
||
|
if (stl_cd1400updatereg(portp, COR1, cor1))
|
||
|
ccr = 1;
|
||
|
if (stl_cd1400updatereg(portp, COR2, cor2))
|
||
|
ccr = 1;
|
||
|
if (stl_cd1400updatereg(portp, COR3, cor3))
|
||
|
ccr = 1;
|
||
|
if (ccr) {
|
||
|
stl_cd1400ccrwait(portp);
|
||
|
stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
|
||
|
}
|
||
|
stl_cd1400setreg(portp, COR4, cor4);
|
||
|
stl_cd1400setreg(portp, COR5, cor5);
|
||
|
stl_cd1400setreg(portp, MCOR1, mcor1);
|
||
|
stl_cd1400setreg(portp, MCOR2, mcor2);
|
||
|
if (baudrate > 0) {
|
||
|
stl_cd1400setreg(portp, TCOR, clk);
|
||
|
stl_cd1400setreg(portp, TBPR, div);
|
||
|
stl_cd1400setreg(portp, RCOR, clk);
|
||
|
stl_cd1400setreg(portp, RBPR, div);
|
||
|
}
|
||
|
stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
|
||
|
stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
|
||
|
stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
|
||
|
stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
|
||
|
stl_cd1400setreg(portp, RTPR, rtpr);
|
||
|
mcor1 = stl_cd1400getreg(portp, MSVR1);
|
||
|
if (mcor1 & MSVR1_DCD)
|
||
|
portp->sigs |= TIOCM_CD;
|
||
|
else
|
||
|
portp->sigs &= ~TIOCM_CD;
|
||
|
stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Set the state of the DTR and RTS signals.
|
||
|
*/
|
||
|
|
||
|
static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts)
|
||
|
{
|
||
|
unsigned char msvr1, msvr2;
|
||
|
unsigned long flags;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_cd1400setsignals(portp=%x,dtr=%d,rts=%d)\n",
|
||
|
(int) portp, dtr, rts);
|
||
|
#endif
|
||
|
|
||
|
msvr1 = 0;
|
||
|
msvr2 = 0;
|
||
|
if (dtr > 0)
|
||
|
msvr1 = MSVR1_DTR;
|
||
|
if (rts > 0)
|
||
|
msvr2 = MSVR2_RTS;
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
|
||
|
if (rts >= 0)
|
||
|
stl_cd1400setreg(portp, MSVR2, msvr2);
|
||
|
if (dtr >= 0)
|
||
|
stl_cd1400setreg(portp, MSVR1, msvr1);
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Return the state of the signals.
|
||
|
*/
|
||
|
|
||
|
static int stl_cd1400getsignals(stlport_t *portp)
|
||
|
{
|
||
|
unsigned char msvr1, msvr2;
|
||
|
unsigned long flags;
|
||
|
int sigs;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_cd1400getsignals(portp=%x)\n", (int) portp);
|
||
|
#endif
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
|
||
|
msvr1 = stl_cd1400getreg(portp, MSVR1);
|
||
|
msvr2 = stl_cd1400getreg(portp, MSVR2);
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
restore_flags(flags);
|
||
|
|
||
|
sigs = 0;
|
||
|
sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
|
||
|
sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
|
||
|
sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
|
||
|
sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
|
||
|
#if 0
|
||
|
sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
|
||
|
sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
|
||
|
#else
|
||
|
sigs |= TIOCM_DSR;
|
||
|
#endif
|
||
|
return(sigs);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Enable/Disable the Transmitter and/or Receiver.
|
||
|
*/
|
||
|
|
||
|
static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx)
|
||
|
{
|
||
|
unsigned char ccr;
|
||
|
unsigned long flags;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_cd1400enablerxtx(portp=%x,rx=%d,tx=%d)\n",
|
||
|
(int) portp, rx, tx);
|
||
|
#endif
|
||
|
ccr = 0;
|
||
|
|
||
|
if (tx == 0)
|
||
|
ccr |= CCR_TXDISABLE;
|
||
|
else if (tx > 0)
|
||
|
ccr |= CCR_TXENABLE;
|
||
|
if (rx == 0)
|
||
|
ccr |= CCR_RXDISABLE;
|
||
|
else if (rx > 0)
|
||
|
ccr |= CCR_RXENABLE;
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
|
||
|
stl_cd1400ccrwait(portp);
|
||
|
stl_cd1400setreg(portp, CCR, ccr);
|
||
|
stl_cd1400ccrwait(portp);
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Start/stop the Transmitter and/or Receiver.
|
||
|
*/
|
||
|
|
||
|
static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx)
|
||
|
{
|
||
|
unsigned char sreron, sreroff;
|
||
|
unsigned long flags;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_cd1400startrxtx(portp=%x,rx=%d,tx=%d)\n",
|
||
|
(int) portp, rx, tx);
|
||
|
#endif
|
||
|
|
||
|
sreron = 0;
|
||
|
sreroff = 0;
|
||
|
if (tx == 0)
|
||
|
sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
|
||
|
else if (tx == 1)
|
||
|
sreron |= SRER_TXDATA;
|
||
|
else if (tx >= 2)
|
||
|
sreron |= SRER_TXEMPTY;
|
||
|
if (rx == 0)
|
||
|
sreroff |= SRER_RXDATA;
|
||
|
else if (rx > 0)
|
||
|
sreron |= SRER_RXDATA;
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
|
||
|
stl_cd1400setreg(portp, SRER,
|
||
|
((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
if (tx > 0)
|
||
|
set_bit(ASYI_TXBUSY, &portp->istate);
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Disable all interrupts from this port.
|
||
|
*/
|
||
|
|
||
|
static void stl_cd1400disableintrs(stlport_t *portp)
|
||
|
{
|
||
|
unsigned long flags;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_cd1400disableintrs(portp=%x)\n", (int) portp);
|
||
|
#endif
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
|
||
|
stl_cd1400setreg(portp, SRER, 0);
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
static void stl_cd1400sendbreak(stlport_t *portp, int len)
|
||
|
{
|
||
|
unsigned long flags;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_cd1400sendbreak(portp=%x,len=%d)\n", (int) portp, len);
|
||
|
#endif
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
|
||
|
stl_cd1400setreg(portp, SRER,
|
||
|
((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
|
||
|
SRER_TXEMPTY));
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
portp->brklen = len;
|
||
|
if (len == 1)
|
||
|
portp->stats.txbreaks++;
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Take flow control actions...
|
||
|
*/
|
||
|
|
||
|
static void stl_cd1400flowctrl(stlport_t *portp, int state)
|
||
|
{
|
||
|
struct tty_struct *tty;
|
||
|
unsigned long flags;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_cd1400flowctrl(portp=%x,state=%x)\n", (int) portp, state);
|
||
|
#endif
|
||
|
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
tty = portp->tty;
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return;
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
|
||
|
|
||
|
if (state) {
|
||
|
if (tty->termios->c_iflag & IXOFF) {
|
||
|
stl_cd1400ccrwait(portp);
|
||
|
stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
|
||
|
portp->stats.rxxon++;
|
||
|
stl_cd1400ccrwait(portp);
|
||
|
}
|
||
|
/*
|
||
|
* Question: should we return RTS to what it was before? It may
|
||
|
* have been set by an ioctl... Suppose not, since if you have
|
||
|
* hardware flow control set then it is pretty silly to go and
|
||
|
* set the RTS line by hand.
|
||
|
*/
|
||
|
if (tty->termios->c_cflag & CRTSCTS) {
|
||
|
stl_cd1400setreg(portp, MCOR1,
|
||
|
(stl_cd1400getreg(portp, MCOR1) |
|
||
|
FIFO_RTSTHRESHOLD));
|
||
|
stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
|
||
|
portp->stats.rxrtson++;
|
||
|
}
|
||
|
} else {
|
||
|
if (tty->termios->c_iflag & IXOFF) {
|
||
|
stl_cd1400ccrwait(portp);
|
||
|
stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
|
||
|
portp->stats.rxxoff++;
|
||
|
stl_cd1400ccrwait(portp);
|
||
|
}
|
||
|
if (tty->termios->c_cflag & CRTSCTS) {
|
||
|
stl_cd1400setreg(portp, MCOR1,
|
||
|
(stl_cd1400getreg(portp, MCOR1) & 0xf0));
|
||
|
stl_cd1400setreg(portp, MSVR2, 0);
|
||
|
portp->stats.rxrtsoff++;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Send a flow control character...
|
||
|
*/
|
||
|
|
||
|
static void stl_cd1400sendflow(stlport_t *portp, int state)
|
||
|
{
|
||
|
struct tty_struct *tty;
|
||
|
unsigned long flags;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_cd1400sendflow(portp=%x,state=%x)\n", (int) portp, state);
|
||
|
#endif
|
||
|
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
tty = portp->tty;
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return;
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
|
||
|
if (state) {
|
||
|
stl_cd1400ccrwait(portp);
|
||
|
stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
|
||
|
portp->stats.rxxon++;
|
||
|
stl_cd1400ccrwait(portp);
|
||
|
} else {
|
||
|
stl_cd1400ccrwait(portp);
|
||
|
stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
|
||
|
portp->stats.rxxoff++;
|
||
|
stl_cd1400ccrwait(portp);
|
||
|
}
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
static void stl_cd1400flush(stlport_t *portp)
|
||
|
{
|
||
|
unsigned long flags;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_cd1400flush(portp=%x)\n", (int) portp);
|
||
|
#endif
|
||
|
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
|
||
|
stl_cd1400ccrwait(portp);
|
||
|
stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
|
||
|
stl_cd1400ccrwait(portp);
|
||
|
portp->tx.tail = portp->tx.head;
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Return the current state of data flow on this port. This is only
|
||
|
* really interresting when determining if data has fully completed
|
||
|
* transmission or not... This is easy for the cd1400, it accurately
|
||
|
* maintains the busy port flag.
|
||
|
*/
|
||
|
|
||
|
static int stl_cd1400datastate(stlport_t *portp)
|
||
|
{
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_cd1400datastate(portp=%x)\n", (int) portp);
|
||
|
#endif
|
||
|
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return(0);
|
||
|
|
||
|
return(test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Interrupt service routine for cd1400 EasyIO boards.
|
||
|
*/
|
||
|
|
||
|
static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase)
|
||
|
{
|
||
|
unsigned char svrtype;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_cd1400eiointr(panelp=%x,iobase=%x)\n",
|
||
|
(int) panelp, iobase);
|
||
|
#endif
|
||
|
|
||
|
outb(SVRR, iobase);
|
||
|
svrtype = inb(iobase + EREG_DATA);
|
||
|
if (panelp->nrports > 4) {
|
||
|
outb((SVRR + 0x80), iobase);
|
||
|
svrtype |= inb(iobase + EREG_DATA);
|
||
|
}
|
||
|
|
||
|
if (svrtype & SVRR_RX)
|
||
|
stl_cd1400rxisr(panelp, iobase);
|
||
|
else if (svrtype & SVRR_TX)
|
||
|
stl_cd1400txisr(panelp, iobase);
|
||
|
else if (svrtype & SVRR_MDM)
|
||
|
stl_cd1400mdmisr(panelp, iobase);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Interrupt service routine for cd1400 panels.
|
||
|
*/
|
||
|
|
||
|
static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase)
|
||
|
{
|
||
|
unsigned char svrtype;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_cd1400echintr(panelp=%x,iobase=%x)\n", (int) panelp,
|
||
|
iobase);
|
||
|
#endif
|
||
|
|
||
|
outb(SVRR, iobase);
|
||
|
svrtype = inb(iobase + EREG_DATA);
|
||
|
outb((SVRR + 0x80), iobase);
|
||
|
svrtype |= inb(iobase + EREG_DATA);
|
||
|
if (svrtype & SVRR_RX)
|
||
|
stl_cd1400rxisr(panelp, iobase);
|
||
|
else if (svrtype & SVRR_TX)
|
||
|
stl_cd1400txisr(panelp, iobase);
|
||
|
else if (svrtype & SVRR_MDM)
|
||
|
stl_cd1400mdmisr(panelp, iobase);
|
||
|
}
|
||
|
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Unfortunately we need to handle breaks in the TX data stream, since
|
||
|
* this is the only way to generate them on the cd1400.
|
||
|
*/
|
||
|
|
||
|
static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr)
|
||
|
{
|
||
|
if (portp->brklen == 1) {
|
||
|
outb((COR2 + portp->uartaddr), ioaddr);
|
||
|
outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
|
||
|
(ioaddr + EREG_DATA));
|
||
|
outb((TDR + portp->uartaddr), ioaddr);
|
||
|
outb(ETC_CMD, (ioaddr + EREG_DATA));
|
||
|
outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
|
||
|
outb((SRER + portp->uartaddr), ioaddr);
|
||
|
outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
|
||
|
(ioaddr + EREG_DATA));
|
||
|
return(1);
|
||
|
} else if (portp->brklen > 1) {
|
||
|
outb((TDR + portp->uartaddr), ioaddr);
|
||
|
outb(ETC_CMD, (ioaddr + EREG_DATA));
|
||
|
outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
|
||
|
portp->brklen = -1;
|
||
|
return(1);
|
||
|
} else {
|
||
|
outb((COR2 + portp->uartaddr), ioaddr);
|
||
|
outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
|
||
|
(ioaddr + EREG_DATA));
|
||
|
portp->brklen = 0;
|
||
|
}
|
||
|
return(0);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Transmit interrupt handler. This has gotta be fast! Handling TX
|
||
|
* chars is pretty simple, stuff as many as possible from the TX buffer
|
||
|
* into the cd1400 FIFO. Must also handle TX breaks here, since they
|
||
|
* are embedded as commands in the data stream. Oh no, had to use a goto!
|
||
|
* This could be optimized more, will do when I get time...
|
||
|
* In practice it is possible that interrupts are enabled but that the
|
||
|
* port has been hung up. Need to handle not having any TX buffer here,
|
||
|
* this is done by using the side effect that head and tail will also
|
||
|
* be NULL if the buffer has been freed.
|
||
|
*/
|
||
|
|
||
|
static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
int len, stlen;
|
||
|
char *head, *tail;
|
||
|
unsigned char ioack, srer;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_cd1400txisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr);
|
||
|
#endif
|
||
|
|
||
|
ioack = inb(ioaddr + EREG_TXACK);
|
||
|
if (((ioack & panelp->ackmask) != 0) ||
|
||
|
((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
|
||
|
printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
|
||
|
return;
|
||
|
}
|
||
|
portp = panelp->ports[(ioack >> 3)];
|
||
|
|
||
|
/*
|
||
|
* Unfortunately we need to handle breaks in the data stream, since
|
||
|
* this is the only way to generate them on the cd1400. Do it now if
|
||
|
* a break is to be sent.
|
||
|
*/
|
||
|
if (portp->brklen != 0)
|
||
|
if (stl_cd1400breakisr(portp, ioaddr))
|
||
|
goto stl_txalldone;
|
||
|
|
||
|
head = portp->tx.head;
|
||
|
tail = portp->tx.tail;
|
||
|
len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
|
||
|
if ((len == 0) || ((len < STL_TXBUFLOW) &&
|
||
|
(test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
|
||
|
set_bit(ASYI_TXLOW, &portp->istate);
|
||
|
schedule_work(&portp->tqueue);
|
||
|
}
|
||
|
|
||
|
if (len == 0) {
|
||
|
outb((SRER + portp->uartaddr), ioaddr);
|
||
|
srer = inb(ioaddr + EREG_DATA);
|
||
|
if (srer & SRER_TXDATA) {
|
||
|
srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
|
||
|
} else {
|
||
|
srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
|
||
|
clear_bit(ASYI_TXBUSY, &portp->istate);
|
||
|
}
|
||
|
outb(srer, (ioaddr + EREG_DATA));
|
||
|
} else {
|
||
|
len = MIN(len, CD1400_TXFIFOSIZE);
|
||
|
portp->stats.txtotal += len;
|
||
|
stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
|
||
|
outb((TDR + portp->uartaddr), ioaddr);
|
||
|
outsb((ioaddr + EREG_DATA), tail, stlen);
|
||
|
len -= stlen;
|
||
|
tail += stlen;
|
||
|
if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
|
||
|
tail = portp->tx.buf;
|
||
|
if (len > 0) {
|
||
|
outsb((ioaddr + EREG_DATA), tail, len);
|
||
|
tail += len;
|
||
|
}
|
||
|
portp->tx.tail = tail;
|
||
|
}
|
||
|
|
||
|
stl_txalldone:
|
||
|
outb((EOSRR + portp->uartaddr), ioaddr);
|
||
|
outb(0, (ioaddr + EREG_DATA));
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Receive character interrupt handler. Determine if we have good chars
|
||
|
* or bad chars and then process appropriately. Good chars are easy
|
||
|
* just shove the lot into the RX buffer and set all status byte to 0.
|
||
|
* If a bad RX char then process as required. This routine needs to be
|
||
|
* fast! In practice it is possible that we get an interrupt on a port
|
||
|
* that is closed. This can happen on hangups - since they completely
|
||
|
* shutdown a port not in user context. Need to handle this case.
|
||
|
*/
|
||
|
|
||
|
static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
struct tty_struct *tty;
|
||
|
unsigned int ioack, len, buflen;
|
||
|
unsigned char status;
|
||
|
char ch;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_cd1400rxisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr);
|
||
|
#endif
|
||
|
|
||
|
ioack = inb(ioaddr + EREG_RXACK);
|
||
|
if ((ioack & panelp->ackmask) != 0) {
|
||
|
printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
|
||
|
return;
|
||
|
}
|
||
|
portp = panelp->ports[(ioack >> 3)];
|
||
|
tty = portp->tty;
|
||
|
|
||
|
if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
|
||
|
outb((RDCR + portp->uartaddr), ioaddr);
|
||
|
len = inb(ioaddr + EREG_DATA);
|
||
|
if ((tty == (struct tty_struct *) NULL) ||
|
||
|
(tty->flip.char_buf_ptr == (char *) NULL) ||
|
||
|
((buflen = TTY_FLIPBUF_SIZE - tty->flip.count) == 0)) {
|
||
|
len = MIN(len, sizeof(stl_unwanted));
|
||
|
outb((RDSR + portp->uartaddr), ioaddr);
|
||
|
insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
|
||
|
portp->stats.rxlost += len;
|
||
|
portp->stats.rxtotal += len;
|
||
|
} else {
|
||
|
len = MIN(len, buflen);
|
||
|
if (len > 0) {
|
||
|
outb((RDSR + portp->uartaddr), ioaddr);
|
||
|
insb((ioaddr + EREG_DATA), tty->flip.char_buf_ptr, len);
|
||
|
memset(tty->flip.flag_buf_ptr, 0, len);
|
||
|
tty->flip.flag_buf_ptr += len;
|
||
|
tty->flip.char_buf_ptr += len;
|
||
|
tty->flip.count += len;
|
||
|
tty_schedule_flip(tty);
|
||
|
portp->stats.rxtotal += len;
|
||
|
}
|
||
|
}
|
||
|
} else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
|
||
|
outb((RDSR + portp->uartaddr), ioaddr);
|
||
|
status = inb(ioaddr + EREG_DATA);
|
||
|
ch = inb(ioaddr + EREG_DATA);
|
||
|
if (status & ST_PARITY)
|
||
|
portp->stats.rxparity++;
|
||
|
if (status & ST_FRAMING)
|
||
|
portp->stats.rxframing++;
|
||
|
if (status & ST_OVERRUN)
|
||
|
portp->stats.rxoverrun++;
|
||
|
if (status & ST_BREAK)
|
||
|
portp->stats.rxbreaks++;
|
||
|
if (status & ST_SCHARMASK) {
|
||
|
if ((status & ST_SCHARMASK) == ST_SCHAR1)
|
||
|
portp->stats.txxon++;
|
||
|
if ((status & ST_SCHARMASK) == ST_SCHAR2)
|
||
|
portp->stats.txxoff++;
|
||
|
goto stl_rxalldone;
|
||
|
}
|
||
|
if ((tty != (struct tty_struct *) NULL) &&
|
||
|
((portp->rxignoremsk & status) == 0)) {
|
||
|
if (portp->rxmarkmsk & status) {
|
||
|
if (status & ST_BREAK) {
|
||
|
status = TTY_BREAK;
|
||
|
if (portp->flags & ASYNC_SAK) {
|
||
|
do_SAK(tty);
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
}
|
||
|
} else if (status & ST_PARITY) {
|
||
|
status = TTY_PARITY;
|
||
|
} else if (status & ST_FRAMING) {
|
||
|
status = TTY_FRAME;
|
||
|
} else if(status & ST_OVERRUN) {
|
||
|
status = TTY_OVERRUN;
|
||
|
} else {
|
||
|
status = 0;
|
||
|
}
|
||
|
} else {
|
||
|
status = 0;
|
||
|
}
|
||
|
if (tty->flip.char_buf_ptr != (char *) NULL) {
|
||
|
if (tty->flip.count < TTY_FLIPBUF_SIZE) {
|
||
|
*tty->flip.flag_buf_ptr++ = status;
|
||
|
*tty->flip.char_buf_ptr++ = ch;
|
||
|
tty->flip.count++;
|
||
|
}
|
||
|
tty_schedule_flip(tty);
|
||
|
}
|
||
|
}
|
||
|
} else {
|
||
|
printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
stl_rxalldone:
|
||
|
outb((EOSRR + portp->uartaddr), ioaddr);
|
||
|
outb(0, (ioaddr + EREG_DATA));
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Modem interrupt handler. The is called when the modem signal line
|
||
|
* (DCD) has changed state. Leave most of the work to the off-level
|
||
|
* processing routine.
|
||
|
*/
|
||
|
|
||
|
static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
unsigned int ioack;
|
||
|
unsigned char misr;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_cd1400mdmisr(panelp=%x)\n", (int) panelp);
|
||
|
#endif
|
||
|
|
||
|
ioack = inb(ioaddr + EREG_MDACK);
|
||
|
if (((ioack & panelp->ackmask) != 0) ||
|
||
|
((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
|
||
|
printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
|
||
|
return;
|
||
|
}
|
||
|
portp = panelp->ports[(ioack >> 3)];
|
||
|
|
||
|
outb((MISR + portp->uartaddr), ioaddr);
|
||
|
misr = inb(ioaddr + EREG_DATA);
|
||
|
if (misr & MISR_DCD) {
|
||
|
set_bit(ASYI_DCDCHANGE, &portp->istate);
|
||
|
schedule_work(&portp->tqueue);
|
||
|
portp->stats.modem++;
|
||
|
}
|
||
|
|
||
|
outb((EOSRR + portp->uartaddr), ioaddr);
|
||
|
outb(0, (ioaddr + EREG_DATA));
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
/* SC26198 HARDWARE FUNCTIONS */
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* These functions get/set/update the registers of the sc26198 UARTs.
|
||
|
* Access to the sc26198 registers is via an address/data io port pair.
|
||
|
* (Maybe should make this inline...)
|
||
|
*/
|
||
|
|
||
|
static int stl_sc26198getreg(stlport_t *portp, int regnr)
|
||
|
{
|
||
|
outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
|
||
|
return(inb(portp->ioaddr + XP_DATA));
|
||
|
}
|
||
|
|
||
|
static void stl_sc26198setreg(stlport_t *portp, int regnr, int value)
|
||
|
{
|
||
|
outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
|
||
|
outb(value, (portp->ioaddr + XP_DATA));
|
||
|
}
|
||
|
|
||
|
static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value)
|
||
|
{
|
||
|
outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
|
||
|
if (inb(portp->ioaddr + XP_DATA) != value) {
|
||
|
outb(value, (portp->ioaddr + XP_DATA));
|
||
|
return(1);
|
||
|
}
|
||
|
return(0);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Functions to get and set the sc26198 global registers.
|
||
|
*/
|
||
|
|
||
|
static int stl_sc26198getglobreg(stlport_t *portp, int regnr)
|
||
|
{
|
||
|
outb(regnr, (portp->ioaddr + XP_ADDR));
|
||
|
return(inb(portp->ioaddr + XP_DATA));
|
||
|
}
|
||
|
|
||
|
#if 0
|
||
|
static void stl_sc26198setglobreg(stlport_t *portp, int regnr, int value)
|
||
|
{
|
||
|
outb(regnr, (portp->ioaddr + XP_ADDR));
|
||
|
outb(value, (portp->ioaddr + XP_DATA));
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Inbitialize the UARTs in a panel. We don't care what sort of board
|
||
|
* these ports are on - since the port io registers are almost
|
||
|
* identical when dealing with ports.
|
||
|
*/
|
||
|
|
||
|
static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp)
|
||
|
{
|
||
|
int chipmask, i;
|
||
|
int nrchips, ioaddr;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_sc26198panelinit(brdp=%x,panelp=%x)\n",
|
||
|
(int) brdp, (int) panelp);
|
||
|
#endif
|
||
|
|
||
|
BRDENABLE(panelp->brdnr, panelp->pagenr);
|
||
|
|
||
|
/*
|
||
|
* Check that each chip is present and started up OK.
|
||
|
*/
|
||
|
chipmask = 0;
|
||
|
nrchips = (panelp->nrports + 4) / SC26198_PORTS;
|
||
|
if (brdp->brdtype == BRD_ECHPCI)
|
||
|
outb(panelp->pagenr, brdp->ioctrl);
|
||
|
|
||
|
for (i = 0; (i < nrchips); i++) {
|
||
|
ioaddr = panelp->iobase + (i * 4);
|
||
|
outb(SCCR, (ioaddr + XP_ADDR));
|
||
|
outb(CR_RESETALL, (ioaddr + XP_DATA));
|
||
|
outb(TSTR, (ioaddr + XP_ADDR));
|
||
|
if (inb(ioaddr + XP_DATA) != 0) {
|
||
|
printk("STALLION: sc26198 not responding, "
|
||
|
"brd=%d panel=%d chip=%d\n",
|
||
|
panelp->brdnr, panelp->panelnr, i);
|
||
|
continue;
|
||
|
}
|
||
|
chipmask |= (0x1 << i);
|
||
|
outb(GCCR, (ioaddr + XP_ADDR));
|
||
|
outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
|
||
|
outb(WDTRCR, (ioaddr + XP_ADDR));
|
||
|
outb(0xff, (ioaddr + XP_DATA));
|
||
|
}
|
||
|
|
||
|
BRDDISABLE(panelp->brdnr);
|
||
|
return(chipmask);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Initialize hardware specific port registers.
|
||
|
*/
|
||
|
|
||
|
static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp)
|
||
|
{
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_sc26198portinit(brdp=%x,panelp=%x,portp=%x)\n",
|
||
|
(int) brdp, (int) panelp, (int) portp);
|
||
|
#endif
|
||
|
|
||
|
if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) ||
|
||
|
(portp == (stlport_t *) NULL))
|
||
|
return;
|
||
|
|
||
|
portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
|
||
|
portp->uartaddr = (portp->portnr & 0x07) << 4;
|
||
|
portp->pagenr = panelp->pagenr;
|
||
|
portp->hwid = 0x1;
|
||
|
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Set up the sc26198 registers for a port based on the termios port
|
||
|
* settings.
|
||
|
*/
|
||
|
|
||
|
static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp)
|
||
|
{
|
||
|
stlbrd_t *brdp;
|
||
|
unsigned long flags;
|
||
|
unsigned int baudrate;
|
||
|
unsigned char mr0, mr1, mr2, clk;
|
||
|
unsigned char imron, imroff, iopr, ipr;
|
||
|
|
||
|
mr0 = 0;
|
||
|
mr1 = 0;
|
||
|
mr2 = 0;
|
||
|
clk = 0;
|
||
|
iopr = 0;
|
||
|
imron = 0;
|
||
|
imroff = 0;
|
||
|
|
||
|
brdp = stl_brds[portp->brdnr];
|
||
|
if (brdp == (stlbrd_t *) NULL)
|
||
|
return;
|
||
|
|
||
|
/*
|
||
|
* Set up the RX char ignore mask with those RX error types we
|
||
|
* can ignore.
|
||
|
*/
|
||
|
portp->rxignoremsk = 0;
|
||
|
if (tiosp->c_iflag & IGNPAR)
|
||
|
portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
|
||
|
SR_RXOVERRUN);
|
||
|
if (tiosp->c_iflag & IGNBRK)
|
||
|
portp->rxignoremsk |= SR_RXBREAK;
|
||
|
|
||
|
portp->rxmarkmsk = SR_RXOVERRUN;
|
||
|
if (tiosp->c_iflag & (INPCK | PARMRK))
|
||
|
portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
|
||
|
if (tiosp->c_iflag & BRKINT)
|
||
|
portp->rxmarkmsk |= SR_RXBREAK;
|
||
|
|
||
|
/*
|
||
|
* Go through the char size, parity and stop bits and set all the
|
||
|
* option register appropriately.
|
||
|
*/
|
||
|
switch (tiosp->c_cflag & CSIZE) {
|
||
|
case CS5:
|
||
|
mr1 |= MR1_CS5;
|
||
|
break;
|
||
|
case CS6:
|
||
|
mr1 |= MR1_CS6;
|
||
|
break;
|
||
|
case CS7:
|
||
|
mr1 |= MR1_CS7;
|
||
|
break;
|
||
|
default:
|
||
|
mr1 |= MR1_CS8;
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
if (tiosp->c_cflag & CSTOPB)
|
||
|
mr2 |= MR2_STOP2;
|
||
|
else
|
||
|
mr2 |= MR2_STOP1;
|
||
|
|
||
|
if (tiosp->c_cflag & PARENB) {
|
||
|
if (tiosp->c_cflag & PARODD)
|
||
|
mr1 |= (MR1_PARENB | MR1_PARODD);
|
||
|
else
|
||
|
mr1 |= (MR1_PARENB | MR1_PAREVEN);
|
||
|
} else {
|
||
|
mr1 |= MR1_PARNONE;
|
||
|
}
|
||
|
|
||
|
mr1 |= MR1_ERRBLOCK;
|
||
|
|
||
|
/*
|
||
|
* Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
|
||
|
* space for hardware flow control and the like. This should be set to
|
||
|
* VMIN.
|
||
|
*/
|
||
|
mr2 |= MR2_RXFIFOHALF;
|
||
|
|
||
|
/*
|
||
|
* Calculate the baud rate timers. For now we will just assume that
|
||
|
* the input and output baud are the same. The sc26198 has a fixed
|
||
|
* baud rate table, so only discrete baud rates possible.
|
||
|
*/
|
||
|
baudrate = tiosp->c_cflag & CBAUD;
|
||
|
if (baudrate & CBAUDEX) {
|
||
|
baudrate &= ~CBAUDEX;
|
||
|
if ((baudrate < 1) || (baudrate > 4))
|
||
|
tiosp->c_cflag &= ~CBAUDEX;
|
||
|
else
|
||
|
baudrate += 15;
|
||
|
}
|
||
|
baudrate = stl_baudrates[baudrate];
|
||
|
if ((tiosp->c_cflag & CBAUD) == B38400) {
|
||
|
if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
|
||
|
baudrate = 57600;
|
||
|
else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
|
||
|
baudrate = 115200;
|
||
|
else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
|
||
|
baudrate = 230400;
|
||
|
else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
|
||
|
baudrate = 460800;
|
||
|
else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
|
||
|
baudrate = (portp->baud_base / portp->custom_divisor);
|
||
|
}
|
||
|
if (baudrate > STL_SC26198MAXBAUD)
|
||
|
baudrate = STL_SC26198MAXBAUD;
|
||
|
|
||
|
if (baudrate > 0) {
|
||
|
for (clk = 0; (clk < SC26198_NRBAUDS); clk++) {
|
||
|
if (baudrate <= sc26198_baudtable[clk])
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Check what form of modem signaling is required and set it up.
|
||
|
*/
|
||
|
if (tiosp->c_cflag & CLOCAL) {
|
||
|
portp->flags &= ~ASYNC_CHECK_CD;
|
||
|
} else {
|
||
|
iopr |= IOPR_DCDCOS;
|
||
|
imron |= IR_IOPORT;
|
||
|
portp->flags |= ASYNC_CHECK_CD;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Setup sc26198 enhanced modes if we can. In particular we want to
|
||
|
* handle as much of the flow control as possible automatically. As
|
||
|
* well as saving a few CPU cycles it will also greatly improve flow
|
||
|
* control reliability.
|
||
|
*/
|
||
|
if (tiosp->c_iflag & IXON) {
|
||
|
mr0 |= MR0_SWFTX | MR0_SWFT;
|
||
|
imron |= IR_XONXOFF;
|
||
|
} else {
|
||
|
imroff |= IR_XONXOFF;
|
||
|
}
|
||
|
if (tiosp->c_iflag & IXOFF)
|
||
|
mr0 |= MR0_SWFRX;
|
||
|
|
||
|
if (tiosp->c_cflag & CRTSCTS) {
|
||
|
mr2 |= MR2_AUTOCTS;
|
||
|
mr1 |= MR1_AUTORTS;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* All sc26198 register values calculated so go through and set
|
||
|
* them all up.
|
||
|
*/
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
|
||
|
portp->portnr, portp->panelnr, portp->brdnr);
|
||
|
printk(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
|
||
|
printk(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
|
||
|
printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
|
||
|
tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
|
||
|
tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
|
||
|
#endif
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
stl_sc26198setreg(portp, IMR, 0);
|
||
|
stl_sc26198updatereg(portp, MR0, mr0);
|
||
|
stl_sc26198updatereg(portp, MR1, mr1);
|
||
|
stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
|
||
|
stl_sc26198updatereg(portp, MR2, mr2);
|
||
|
stl_sc26198updatereg(portp, IOPIOR,
|
||
|
((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
|
||
|
|
||
|
if (baudrate > 0) {
|
||
|
stl_sc26198setreg(portp, TXCSR, clk);
|
||
|
stl_sc26198setreg(portp, RXCSR, clk);
|
||
|
}
|
||
|
|
||
|
stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
|
||
|
stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
|
||
|
|
||
|
ipr = stl_sc26198getreg(portp, IPR);
|
||
|
if (ipr & IPR_DCD)
|
||
|
portp->sigs &= ~TIOCM_CD;
|
||
|
else
|
||
|
portp->sigs |= TIOCM_CD;
|
||
|
|
||
|
portp->imr = (portp->imr & ~imroff) | imron;
|
||
|
stl_sc26198setreg(portp, IMR, portp->imr);
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Set the state of the DTR and RTS signals.
|
||
|
*/
|
||
|
|
||
|
static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts)
|
||
|
{
|
||
|
unsigned char iopioron, iopioroff;
|
||
|
unsigned long flags;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_sc26198setsignals(portp=%x,dtr=%d,rts=%d)\n",
|
||
|
(int) portp, dtr, rts);
|
||
|
#endif
|
||
|
|
||
|
iopioron = 0;
|
||
|
iopioroff = 0;
|
||
|
if (dtr == 0)
|
||
|
iopioroff |= IPR_DTR;
|
||
|
else if (dtr > 0)
|
||
|
iopioron |= IPR_DTR;
|
||
|
if (rts == 0)
|
||
|
iopioroff |= IPR_RTS;
|
||
|
else if (rts > 0)
|
||
|
iopioron |= IPR_RTS;
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
stl_sc26198setreg(portp, IOPIOR,
|
||
|
((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Return the state of the signals.
|
||
|
*/
|
||
|
|
||
|
static int stl_sc26198getsignals(stlport_t *portp)
|
||
|
{
|
||
|
unsigned char ipr;
|
||
|
unsigned long flags;
|
||
|
int sigs;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_sc26198getsignals(portp=%x)\n", (int) portp);
|
||
|
#endif
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
ipr = stl_sc26198getreg(portp, IPR);
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
restore_flags(flags);
|
||
|
|
||
|
sigs = 0;
|
||
|
sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
|
||
|
sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
|
||
|
sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
|
||
|
sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
|
||
|
sigs |= TIOCM_DSR;
|
||
|
return(sigs);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Enable/Disable the Transmitter and/or Receiver.
|
||
|
*/
|
||
|
|
||
|
static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx)
|
||
|
{
|
||
|
unsigned char ccr;
|
||
|
unsigned long flags;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_sc26198enablerxtx(portp=%x,rx=%d,tx=%d)\n",
|
||
|
(int) portp, rx, tx);
|
||
|
#endif
|
||
|
|
||
|
ccr = portp->crenable;
|
||
|
if (tx == 0)
|
||
|
ccr &= ~CR_TXENABLE;
|
||
|
else if (tx > 0)
|
||
|
ccr |= CR_TXENABLE;
|
||
|
if (rx == 0)
|
||
|
ccr &= ~CR_RXENABLE;
|
||
|
else if (rx > 0)
|
||
|
ccr |= CR_RXENABLE;
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
stl_sc26198setreg(portp, SCCR, ccr);
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
portp->crenable = ccr;
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Start/stop the Transmitter and/or Receiver.
|
||
|
*/
|
||
|
|
||
|
static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx)
|
||
|
{
|
||
|
unsigned char imr;
|
||
|
unsigned long flags;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_sc26198startrxtx(portp=%x,rx=%d,tx=%d)\n",
|
||
|
(int) portp, rx, tx);
|
||
|
#endif
|
||
|
|
||
|
imr = portp->imr;
|
||
|
if (tx == 0)
|
||
|
imr &= ~IR_TXRDY;
|
||
|
else if (tx == 1)
|
||
|
imr |= IR_TXRDY;
|
||
|
if (rx == 0)
|
||
|
imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
|
||
|
else if (rx > 0)
|
||
|
imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
stl_sc26198setreg(portp, IMR, imr);
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
portp->imr = imr;
|
||
|
if (tx > 0)
|
||
|
set_bit(ASYI_TXBUSY, &portp->istate);
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Disable all interrupts from this port.
|
||
|
*/
|
||
|
|
||
|
static void stl_sc26198disableintrs(stlport_t *portp)
|
||
|
{
|
||
|
unsigned long flags;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_sc26198disableintrs(portp=%x)\n", (int) portp);
|
||
|
#endif
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
portp->imr = 0;
|
||
|
stl_sc26198setreg(portp, IMR, 0);
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
static void stl_sc26198sendbreak(stlport_t *portp, int len)
|
||
|
{
|
||
|
unsigned long flags;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_sc26198sendbreak(portp=%x,len=%d)\n", (int) portp, len);
|
||
|
#endif
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
if (len == 1) {
|
||
|
stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
|
||
|
portp->stats.txbreaks++;
|
||
|
} else {
|
||
|
stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
|
||
|
}
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Take flow control actions...
|
||
|
*/
|
||
|
|
||
|
static void stl_sc26198flowctrl(stlport_t *portp, int state)
|
||
|
{
|
||
|
struct tty_struct *tty;
|
||
|
unsigned long flags;
|
||
|
unsigned char mr0;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_sc26198flowctrl(portp=%x,state=%x)\n", (int) portp, state);
|
||
|
#endif
|
||
|
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
tty = portp->tty;
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return;
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
|
||
|
if (state) {
|
||
|
if (tty->termios->c_iflag & IXOFF) {
|
||
|
mr0 = stl_sc26198getreg(portp, MR0);
|
||
|
stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
|
||
|
stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
|
||
|
mr0 |= MR0_SWFRX;
|
||
|
portp->stats.rxxon++;
|
||
|
stl_sc26198wait(portp);
|
||
|
stl_sc26198setreg(portp, MR0, mr0);
|
||
|
}
|
||
|
/*
|
||
|
* Question: should we return RTS to what it was before? It may
|
||
|
* have been set by an ioctl... Suppose not, since if you have
|
||
|
* hardware flow control set then it is pretty silly to go and
|
||
|
* set the RTS line by hand.
|
||
|
*/
|
||
|
if (tty->termios->c_cflag & CRTSCTS) {
|
||
|
stl_sc26198setreg(portp, MR1,
|
||
|
(stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
|
||
|
stl_sc26198setreg(portp, IOPIOR,
|
||
|
(stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
|
||
|
portp->stats.rxrtson++;
|
||
|
}
|
||
|
} else {
|
||
|
if (tty->termios->c_iflag & IXOFF) {
|
||
|
mr0 = stl_sc26198getreg(portp, MR0);
|
||
|
stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
|
||
|
stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
|
||
|
mr0 &= ~MR0_SWFRX;
|
||
|
portp->stats.rxxoff++;
|
||
|
stl_sc26198wait(portp);
|
||
|
stl_sc26198setreg(portp, MR0, mr0);
|
||
|
}
|
||
|
if (tty->termios->c_cflag & CRTSCTS) {
|
||
|
stl_sc26198setreg(portp, MR1,
|
||
|
(stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
|
||
|
stl_sc26198setreg(portp, IOPIOR,
|
||
|
(stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
|
||
|
portp->stats.rxrtsoff++;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Send a flow control character.
|
||
|
*/
|
||
|
|
||
|
static void stl_sc26198sendflow(stlport_t *portp, int state)
|
||
|
{
|
||
|
struct tty_struct *tty;
|
||
|
unsigned long flags;
|
||
|
unsigned char mr0;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_sc26198sendflow(portp=%x,state=%x)\n", (int) portp, state);
|
||
|
#endif
|
||
|
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
tty = portp->tty;
|
||
|
if (tty == (struct tty_struct *) NULL)
|
||
|
return;
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
if (state) {
|
||
|
mr0 = stl_sc26198getreg(portp, MR0);
|
||
|
stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
|
||
|
stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
|
||
|
mr0 |= MR0_SWFRX;
|
||
|
portp->stats.rxxon++;
|
||
|
stl_sc26198wait(portp);
|
||
|
stl_sc26198setreg(portp, MR0, mr0);
|
||
|
} else {
|
||
|
mr0 = stl_sc26198getreg(portp, MR0);
|
||
|
stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
|
||
|
stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
|
||
|
mr0 &= ~MR0_SWFRX;
|
||
|
portp->stats.rxxoff++;
|
||
|
stl_sc26198wait(portp);
|
||
|
stl_sc26198setreg(portp, MR0, mr0);
|
||
|
}
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
static void stl_sc26198flush(stlport_t *portp)
|
||
|
{
|
||
|
unsigned long flags;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_sc26198flush(portp=%x)\n", (int) portp);
|
||
|
#endif
|
||
|
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
stl_sc26198setreg(portp, SCCR, CR_TXRESET);
|
||
|
stl_sc26198setreg(portp, SCCR, portp->crenable);
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
portp->tx.tail = portp->tx.head;
|
||
|
restore_flags(flags);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Return the current state of data flow on this port. This is only
|
||
|
* really interresting when determining if data has fully completed
|
||
|
* transmission or not... The sc26198 interrupt scheme cannot
|
||
|
* determine when all data has actually drained, so we need to
|
||
|
* check the port statusy register to be sure.
|
||
|
*/
|
||
|
|
||
|
static int stl_sc26198datastate(stlport_t *portp)
|
||
|
{
|
||
|
unsigned long flags;
|
||
|
unsigned char sr;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_sc26198datastate(portp=%x)\n", (int) portp);
|
||
|
#endif
|
||
|
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return(0);
|
||
|
if (test_bit(ASYI_TXBUSY, &portp->istate))
|
||
|
return(1);
|
||
|
|
||
|
save_flags(flags);
|
||
|
cli();
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
sr = stl_sc26198getreg(portp, SR);
|
||
|
BRDDISABLE(portp->brdnr);
|
||
|
restore_flags(flags);
|
||
|
|
||
|
return((sr & SR_TXEMPTY) ? 0 : 1);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Delay for a small amount of time, to give the sc26198 a chance
|
||
|
* to process a command...
|
||
|
*/
|
||
|
|
||
|
static void stl_sc26198wait(stlport_t *portp)
|
||
|
{
|
||
|
int i;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_sc26198wait(portp=%x)\n", (int) portp);
|
||
|
#endif
|
||
|
|
||
|
if (portp == (stlport_t *) NULL)
|
||
|
return;
|
||
|
|
||
|
for (i = 0; (i < 20); i++)
|
||
|
stl_sc26198getglobreg(portp, TSTR);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* If we are TX flow controlled and in IXANY mode then we may
|
||
|
* need to unflow control here. We gotta do this because of the
|
||
|
* automatic flow control modes of the sc26198.
|
||
|
*/
|
||
|
|
||
|
static inline void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty)
|
||
|
{
|
||
|
unsigned char mr0;
|
||
|
|
||
|
mr0 = stl_sc26198getreg(portp, MR0);
|
||
|
stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
|
||
|
stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
|
||
|
stl_sc26198wait(portp);
|
||
|
stl_sc26198setreg(portp, MR0, mr0);
|
||
|
clear_bit(ASYI_TXFLOWED, &portp->istate);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Interrupt service routine for sc26198 panels.
|
||
|
*/
|
||
|
|
||
|
static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase)
|
||
|
{
|
||
|
stlport_t *portp;
|
||
|
unsigned int iack;
|
||
|
|
||
|
/*
|
||
|
* Work around bug in sc26198 chip... Cannot have A6 address
|
||
|
* line of UART high, else iack will be returned as 0.
|
||
|
*/
|
||
|
outb(0, (iobase + 1));
|
||
|
|
||
|
iack = inb(iobase + XP_IACK);
|
||
|
portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
|
||
|
|
||
|
if (iack & IVR_RXDATA)
|
||
|
stl_sc26198rxisr(portp, iack);
|
||
|
else if (iack & IVR_TXDATA)
|
||
|
stl_sc26198txisr(portp);
|
||
|
else
|
||
|
stl_sc26198otherisr(portp, iack);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Transmit interrupt handler. This has gotta be fast! Handling TX
|
||
|
* chars is pretty simple, stuff as many as possible from the TX buffer
|
||
|
* into the sc26198 FIFO.
|
||
|
* In practice it is possible that interrupts are enabled but that the
|
||
|
* port has been hung up. Need to handle not having any TX buffer here,
|
||
|
* this is done by using the side effect that head and tail will also
|
||
|
* be NULL if the buffer has been freed.
|
||
|
*/
|
||
|
|
||
|
static void stl_sc26198txisr(stlport_t *portp)
|
||
|
{
|
||
|
unsigned int ioaddr;
|
||
|
unsigned char mr0;
|
||
|
int len, stlen;
|
||
|
char *head, *tail;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_sc26198txisr(portp=%x)\n", (int) portp);
|
||
|
#endif
|
||
|
|
||
|
ioaddr = portp->ioaddr;
|
||
|
head = portp->tx.head;
|
||
|
tail = portp->tx.tail;
|
||
|
len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
|
||
|
if ((len == 0) || ((len < STL_TXBUFLOW) &&
|
||
|
(test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
|
||
|
set_bit(ASYI_TXLOW, &portp->istate);
|
||
|
schedule_work(&portp->tqueue);
|
||
|
}
|
||
|
|
||
|
if (len == 0) {
|
||
|
outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
|
||
|
mr0 = inb(ioaddr + XP_DATA);
|
||
|
if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
|
||
|
portp->imr &= ~IR_TXRDY;
|
||
|
outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
|
||
|
outb(portp->imr, (ioaddr + XP_DATA));
|
||
|
clear_bit(ASYI_TXBUSY, &portp->istate);
|
||
|
} else {
|
||
|
mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
|
||
|
outb(mr0, (ioaddr + XP_DATA));
|
||
|
}
|
||
|
} else {
|
||
|
len = MIN(len, SC26198_TXFIFOSIZE);
|
||
|
portp->stats.txtotal += len;
|
||
|
stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
|
||
|
outb(GTXFIFO, (ioaddr + XP_ADDR));
|
||
|
outsb((ioaddr + XP_DATA), tail, stlen);
|
||
|
len -= stlen;
|
||
|
tail += stlen;
|
||
|
if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
|
||
|
tail = portp->tx.buf;
|
||
|
if (len > 0) {
|
||
|
outsb((ioaddr + XP_DATA), tail, len);
|
||
|
tail += len;
|
||
|
}
|
||
|
portp->tx.tail = tail;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Receive character interrupt handler. Determine if we have good chars
|
||
|
* or bad chars and then process appropriately. Good chars are easy
|
||
|
* just shove the lot into the RX buffer and set all status byte to 0.
|
||
|
* If a bad RX char then process as required. This routine needs to be
|
||
|
* fast! In practice it is possible that we get an interrupt on a port
|
||
|
* that is closed. This can happen on hangups - since they completely
|
||
|
* shutdown a port not in user context. Need to handle this case.
|
||
|
*/
|
||
|
|
||
|
static void stl_sc26198rxisr(stlport_t *portp, unsigned int iack)
|
||
|
{
|
||
|
struct tty_struct *tty;
|
||
|
unsigned int len, buflen, ioaddr;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_sc26198rxisr(portp=%x,iack=%x)\n", (int) portp, iack);
|
||
|
#endif
|
||
|
|
||
|
tty = portp->tty;
|
||
|
ioaddr = portp->ioaddr;
|
||
|
outb(GIBCR, (ioaddr + XP_ADDR));
|
||
|
len = inb(ioaddr + XP_DATA) + 1;
|
||
|
|
||
|
if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
|
||
|
if ((tty == (struct tty_struct *) NULL) ||
|
||
|
(tty->flip.char_buf_ptr == (char *) NULL) ||
|
||
|
((buflen = TTY_FLIPBUF_SIZE - tty->flip.count) == 0)) {
|
||
|
len = MIN(len, sizeof(stl_unwanted));
|
||
|
outb(GRXFIFO, (ioaddr + XP_ADDR));
|
||
|
insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
|
||
|
portp->stats.rxlost += len;
|
||
|
portp->stats.rxtotal += len;
|
||
|
} else {
|
||
|
len = MIN(len, buflen);
|
||
|
if (len > 0) {
|
||
|
outb(GRXFIFO, (ioaddr + XP_ADDR));
|
||
|
insb((ioaddr + XP_DATA), tty->flip.char_buf_ptr, len);
|
||
|
memset(tty->flip.flag_buf_ptr, 0, len);
|
||
|
tty->flip.flag_buf_ptr += len;
|
||
|
tty->flip.char_buf_ptr += len;
|
||
|
tty->flip.count += len;
|
||
|
tty_schedule_flip(tty);
|
||
|
portp->stats.rxtotal += len;
|
||
|
}
|
||
|
}
|
||
|
} else {
|
||
|
stl_sc26198rxbadchars(portp);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* If we are TX flow controlled and in IXANY mode then we may need
|
||
|
* to unflow control here. We gotta do this because of the automatic
|
||
|
* flow control modes of the sc26198.
|
||
|
*/
|
||
|
if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
|
||
|
if ((tty != (struct tty_struct *) NULL) &&
|
||
|
(tty->termios != (struct termios *) NULL) &&
|
||
|
(tty->termios->c_iflag & IXANY)) {
|
||
|
stl_sc26198txunflow(portp, tty);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Process an RX bad character.
|
||
|
*/
|
||
|
|
||
|
static inline void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch)
|
||
|
{
|
||
|
struct tty_struct *tty;
|
||
|
unsigned int ioaddr;
|
||
|
|
||
|
tty = portp->tty;
|
||
|
ioaddr = portp->ioaddr;
|
||
|
|
||
|
if (status & SR_RXPARITY)
|
||
|
portp->stats.rxparity++;
|
||
|
if (status & SR_RXFRAMING)
|
||
|
portp->stats.rxframing++;
|
||
|
if (status & SR_RXOVERRUN)
|
||
|
portp->stats.rxoverrun++;
|
||
|
if (status & SR_RXBREAK)
|
||
|
portp->stats.rxbreaks++;
|
||
|
|
||
|
if ((tty != (struct tty_struct *) NULL) &&
|
||
|
((portp->rxignoremsk & status) == 0)) {
|
||
|
if (portp->rxmarkmsk & status) {
|
||
|
if (status & SR_RXBREAK) {
|
||
|
status = TTY_BREAK;
|
||
|
if (portp->flags & ASYNC_SAK) {
|
||
|
do_SAK(tty);
|
||
|
BRDENABLE(portp->brdnr, portp->pagenr);
|
||
|
}
|
||
|
} else if (status & SR_RXPARITY) {
|
||
|
status = TTY_PARITY;
|
||
|
} else if (status & SR_RXFRAMING) {
|
||
|
status = TTY_FRAME;
|
||
|
} else if(status & SR_RXOVERRUN) {
|
||
|
status = TTY_OVERRUN;
|
||
|
} else {
|
||
|
status = 0;
|
||
|
}
|
||
|
} else {
|
||
|
status = 0;
|
||
|
}
|
||
|
|
||
|
if (tty->flip.char_buf_ptr != (char *) NULL) {
|
||
|
if (tty->flip.count < TTY_FLIPBUF_SIZE) {
|
||
|
*tty->flip.flag_buf_ptr++ = status;
|
||
|
*tty->flip.char_buf_ptr++ = ch;
|
||
|
tty->flip.count++;
|
||
|
}
|
||
|
tty_schedule_flip(tty);
|
||
|
}
|
||
|
|
||
|
if (status == 0)
|
||
|
portp->stats.rxtotal++;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Process all characters in the RX FIFO of the UART. Check all char
|
||
|
* status bytes as well, and process as required. We need to check
|
||
|
* all bytes in the FIFO, in case some more enter the FIFO while we
|
||
|
* are here. To get the exact character error type we need to switch
|
||
|
* into CHAR error mode (that is why we need to make sure we empty
|
||
|
* the FIFO).
|
||
|
*/
|
||
|
|
||
|
static void stl_sc26198rxbadchars(stlport_t *portp)
|
||
|
{
|
||
|
unsigned char status, mr1;
|
||
|
char ch;
|
||
|
|
||
|
/*
|
||
|
* To get the precise error type for each character we must switch
|
||
|
* back into CHAR error mode.
|
||
|
*/
|
||
|
mr1 = stl_sc26198getreg(portp, MR1);
|
||
|
stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
|
||
|
|
||
|
while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
|
||
|
stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
|
||
|
ch = stl_sc26198getreg(portp, RXFIFO);
|
||
|
stl_sc26198rxbadch(portp, status, ch);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* To get correct interrupt class we must switch back into BLOCK
|
||
|
* error mode.
|
||
|
*/
|
||
|
stl_sc26198setreg(portp, MR1, mr1);
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|
||
|
|
||
|
/*
|
||
|
* Other interrupt handler. This includes modem signals, flow
|
||
|
* control actions, etc. Most stuff is left to off-level interrupt
|
||
|
* processing time.
|
||
|
*/
|
||
|
|
||
|
static void stl_sc26198otherisr(stlport_t *portp, unsigned int iack)
|
||
|
{
|
||
|
unsigned char cir, ipr, xisr;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
printk("stl_sc26198otherisr(portp=%x,iack=%x)\n", (int) portp, iack);
|
||
|
#endif
|
||
|
|
||
|
cir = stl_sc26198getglobreg(portp, CIR);
|
||
|
|
||
|
switch (cir & CIR_SUBTYPEMASK) {
|
||
|
case CIR_SUBCOS:
|
||
|
ipr = stl_sc26198getreg(portp, IPR);
|
||
|
if (ipr & IPR_DCDCHANGE) {
|
||
|
set_bit(ASYI_DCDCHANGE, &portp->istate);
|
||
|
schedule_work(&portp->tqueue);
|
||
|
portp->stats.modem++;
|
||
|
}
|
||
|
break;
|
||
|
case CIR_SUBXONXOFF:
|
||
|
xisr = stl_sc26198getreg(portp, XISR);
|
||
|
if (xisr & XISR_RXXONGOT) {
|
||
|
set_bit(ASYI_TXFLOWED, &portp->istate);
|
||
|
portp->stats.txxoff++;
|
||
|
}
|
||
|
if (xisr & XISR_RXXOFFGOT) {
|
||
|
clear_bit(ASYI_TXFLOWED, &portp->istate);
|
||
|
portp->stats.txxon++;
|
||
|
}
|
||
|
break;
|
||
|
case CIR_SUBBREAK:
|
||
|
stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
|
||
|
stl_sc26198rxbadchars(portp);
|
||
|
break;
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************/
|