429 lines
11 KiB
C
429 lines
11 KiB
C
/*
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comedi/drivers/ni_daq_dio24.c
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Driver for National Instruments PCMCIA DAQ-Card DIO-24
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Copyright (C) 2002 Daniel Vecino Castel <dvecino@able.es>
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PCMCIA crap at end of file is adapted from dummy_cs.c 1.31 2001/08/24 12:13:13
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from the pcmcia package.
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The initial developer of the pcmcia dummy_cs.c code is David A. Hinds
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<dahinds@users.sourceforge.net>. Portions created by David A. Hinds
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are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
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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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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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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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/*
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Driver: ni_daq_dio24
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Description: National Instruments PCMCIA DAQ-Card DIO-24
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Author: Daniel Vecino Castel <dvecino@able.es>
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Devices: [National Instruments] PCMCIA DAQ-Card DIO-24 (ni_daq_dio24)
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Status: ?
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Updated: Thu, 07 Nov 2002 21:53:06 -0800
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This is just a wrapper around the 8255.o driver to properly handle
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the PCMCIA interface.
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*/
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/* #define LABPC_DEBUG *//* enable debugging messages */
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#undef LABPC_DEBUG
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#include <linux/interrupt.h>
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#include <linux/slab.h>
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#include "../comedidev.h"
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#include <linux/ioport.h>
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#include "8255.h"
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#include <pcmcia/cistpl.h>
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#include <pcmcia/cisreg.h>
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#include <pcmcia/ds.h>
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static struct pcmcia_device *pcmcia_cur_dev = NULL;
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#define DIO24_SIZE 4 /* size of io region used by board */
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static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it);
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static int dio24_detach(struct comedi_device *dev);
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enum dio24_bustype { pcmcia_bustype };
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struct dio24_board_struct {
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const char *name;
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int device_id; /* device id for pcmcia board */
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enum dio24_bustype bustype; /* PCMCIA */
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int have_dio; /* have 8255 chip */
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/* function pointers so we can use inb/outb or readb/writeb as appropriate */
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unsigned int (*read_byte) (unsigned int address);
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void (*write_byte) (unsigned int byte, unsigned int address);
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};
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static const struct dio24_board_struct dio24_boards[] = {
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{
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.name = "daqcard-dio24",
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.device_id = 0x475c, /* 0x10b is manufacturer id, 0x475c is device id */
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.bustype = pcmcia_bustype,
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.have_dio = 1,
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},
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{
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.name = "ni_daq_dio24",
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.device_id = 0x475c, /* 0x10b is manufacturer id, 0x475c is device id */
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.bustype = pcmcia_bustype,
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.have_dio = 1,
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},
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};
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/*
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* Useful for shorthand access to the particular board structure
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*/
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#define thisboard ((const struct dio24_board_struct *)dev->board_ptr)
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struct dio24_private {
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int data; /* number of data points left to be taken */
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};
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#define devpriv ((struct dio24_private *)dev->private)
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static struct comedi_driver driver_dio24 = {
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.driver_name = "ni_daq_dio24",
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.module = THIS_MODULE,
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.attach = dio24_attach,
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.detach = dio24_detach,
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.num_names = ARRAY_SIZE(dio24_boards),
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.board_name = &dio24_boards[0].name,
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.offset = sizeof(struct dio24_board_struct),
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};
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static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it)
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{
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struct comedi_subdevice *s;
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unsigned long iobase = 0;
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#ifdef incomplete
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unsigned int irq = 0;
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#endif
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struct pcmcia_device *link;
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/* allocate and initialize dev->private */
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if (alloc_private(dev, sizeof(struct dio24_private)) < 0)
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return -ENOMEM;
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/* get base address, irq etc. based on bustype */
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switch (thisboard->bustype) {
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case pcmcia_bustype:
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link = pcmcia_cur_dev; /* XXX hack */
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if (!link)
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return -EIO;
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iobase = link->resource[0]->start;
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#ifdef incomplete
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irq = link->irq;
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#endif
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break;
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default:
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printk("bug! couldn't determine board type\n");
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return -EINVAL;
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break;
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}
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printk("comedi%d: ni_daq_dio24: %s, io 0x%lx", dev->minor,
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thisboard->name, iobase);
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#ifdef incomplete
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if (irq) {
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printk(", irq %u", irq);
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}
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#endif
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printk("\n");
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if (iobase == 0) {
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printk("io base address is zero!\n");
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return -EINVAL;
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}
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dev->iobase = iobase;
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#ifdef incomplete
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/* grab our IRQ */
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dev->irq = irq;
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#endif
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dev->board_name = thisboard->name;
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if (alloc_subdevices(dev, 1) < 0)
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return -ENOMEM;
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/* 8255 dio */
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s = dev->subdevices + 0;
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subdev_8255_init(dev, s, NULL, dev->iobase);
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return 0;
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};
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static int dio24_detach(struct comedi_device *dev)
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{
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printk("comedi%d: ni_daq_dio24: remove\n", dev->minor);
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if (dev->subdevices)
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subdev_8255_cleanup(dev, dev->subdevices + 0);
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if (thisboard->bustype != pcmcia_bustype && dev->iobase)
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release_region(dev->iobase, DIO24_SIZE);
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if (dev->irq)
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free_irq(dev->irq, dev);
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return 0;
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};
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/* PCMCIA crap -- watch your words! */
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static void dio24_config(struct pcmcia_device *link);
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static void dio24_release(struct pcmcia_device *link);
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static int dio24_cs_suspend(struct pcmcia_device *p_dev);
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static int dio24_cs_resume(struct pcmcia_device *p_dev);
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/*
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The attach() and detach() entry points are used to create and destroy
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"instances" of the driver, where each instance represents everything
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needed to manage one actual PCMCIA card.
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*/
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static int dio24_cs_attach(struct pcmcia_device *);
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static void dio24_cs_detach(struct pcmcia_device *);
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/*
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You'll also need to prototype all the functions that will actually
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be used to talk to your device. See 'memory_cs' for a good example
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of a fully self-sufficient driver; the other drivers rely more or
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less on other parts of the kernel.
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*/
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struct local_info_t {
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struct pcmcia_device *link;
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int stop;
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struct bus_operations *bus;
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};
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/*======================================================================
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dio24_cs_attach() creates an "instance" of the driver, allocating
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local data structures for one device. The device is registered
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with Card Services.
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The dev_link structure is initialized, but we don't actually
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configure the card at this point -- we wait until we receive a
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card insertion event.
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======================================================================*/
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static int dio24_cs_attach(struct pcmcia_device *link)
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{
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struct local_info_t *local;
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printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - CS-attach!\n");
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dev_dbg(&link->dev, "dio24_cs_attach()\n");
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/* Allocate space for private device-specific data */
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local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
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if (!local)
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return -ENOMEM;
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local->link = link;
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link->priv = local;
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pcmcia_cur_dev = link;
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dio24_config(link);
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return 0;
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} /* dio24_cs_attach */
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/*======================================================================
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This deletes a driver "instance". The device is de-registered
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with Card Services. If it has been released, all local data
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structures are freed. Otherwise, the structures will be freed
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when the device is released.
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======================================================================*/
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static void dio24_cs_detach(struct pcmcia_device *link)
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{
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printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - cs-detach!\n");
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dev_dbg(&link->dev, "dio24_cs_detach\n");
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((struct local_info_t *)link->priv)->stop = 1;
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dio24_release(link);
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/* This points to the parent local_info_t struct */
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kfree(link->priv);
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} /* dio24_cs_detach */
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/*======================================================================
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dio24_config() is scheduled to run after a CARD_INSERTION event
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is received, to configure the PCMCIA socket, and to make the
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device available to the system.
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======================================================================*/
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static int dio24_pcmcia_config_loop(struct pcmcia_device *p_dev,
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void *priv_data)
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{
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if (p_dev->config_index == 0)
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return -EINVAL;
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return pcmcia_request_io(p_dev);
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}
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static void dio24_config(struct pcmcia_device *link)
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{
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int ret;
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printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO! - config\n");
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dev_dbg(&link->dev, "dio24_config\n");
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link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_AUDIO |
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CONF_AUTO_SET_IO;
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ret = pcmcia_loop_config(link, dio24_pcmcia_config_loop, NULL);
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if (ret) {
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dev_warn(&link->dev, "no configuration found\n");
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goto failed;
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}
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if (!link->irq)
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goto failed;
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/*
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This actually configures the PCMCIA socket -- setting up
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the I/O windows and the interrupt mapping, and putting the
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card and host interface into "Memory and IO" mode.
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*/
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ret = pcmcia_enable_device(link);
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if (ret)
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goto failed;
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/* Finally, report what we've done */
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dev_info(&link->dev, "index 0x%02x", link->config_index);
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printk(", irq %d", link->irq);
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if (link->resource[0])
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printk(" & %pR", link->resource[0]);
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if (link->resource[1])
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printk(" & %pR", link->resource[1]);
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printk("\n");
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return;
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failed:
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printk(KERN_INFO "Fallo");
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dio24_release(link);
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} /* dio24_config */
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static void dio24_release(struct pcmcia_device *link)
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{
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dev_dbg(&link->dev, "dio24_release\n");
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pcmcia_disable_device(link);
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} /* dio24_release */
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/*======================================================================
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The card status event handler. Mostly, this schedules other
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stuff to run after an event is received.
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When a CARD_REMOVAL event is received, we immediately set a
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private flag to block future accesses to this device. All the
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functions that actually access the device should check this flag
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to make sure the card is still present.
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======================================================================*/
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static int dio24_cs_suspend(struct pcmcia_device *link)
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{
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struct local_info_t *local = link->priv;
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/* Mark the device as stopped, to block IO until later */
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local->stop = 1;
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return 0;
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} /* dio24_cs_suspend */
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static int dio24_cs_resume(struct pcmcia_device *link)
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{
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struct local_info_t *local = link->priv;
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local->stop = 0;
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return 0;
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} /* dio24_cs_resume */
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/*====================================================================*/
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static struct pcmcia_device_id dio24_cs_ids[] = {
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/* N.B. These IDs should match those in dio24_boards */
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PCMCIA_DEVICE_MANF_CARD(0x010b, 0x475c), /* daqcard-dio24 */
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PCMCIA_DEVICE_NULL
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};
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MODULE_DEVICE_TABLE(pcmcia, dio24_cs_ids);
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MODULE_AUTHOR("Daniel Vecino Castel <dvecino@able.es>");
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MODULE_DESCRIPTION("Comedi driver for National Instruments "
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"PCMCIA DAQ-Card DIO-24");
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MODULE_LICENSE("GPL");
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struct pcmcia_driver dio24_cs_driver = {
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.probe = dio24_cs_attach,
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.remove = dio24_cs_detach,
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.suspend = dio24_cs_suspend,
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.resume = dio24_cs_resume,
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.id_table = dio24_cs_ids,
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.owner = THIS_MODULE,
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.drv = {
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.name = "ni_daq_dio24",
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},
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};
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static int __init init_dio24_cs(void)
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{
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printk("ni_daq_dio24: HOLA SOY YO!\n");
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pcmcia_register_driver(&dio24_cs_driver);
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return 0;
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}
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static void __exit exit_dio24_cs(void)
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{
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pcmcia_unregister_driver(&dio24_cs_driver);
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}
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int __init init_module(void)
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{
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int ret;
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ret = init_dio24_cs();
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if (ret < 0)
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return ret;
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return comedi_driver_register(&driver_dio24);
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}
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void __exit cleanup_module(void)
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{
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exit_dio24_cs();
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comedi_driver_unregister(&driver_dio24);
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}
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