![Tilman Schmidt](/assets/img/avatar_default.png)
Commit 5a0e3ad
causes slab.h to be included twice in many of the
Gigaset driver's source files, first via the common include file
gigaset.h and then a second time directly. Drop the spares, and
use the opportunity to clean up a few more similar cases.
Impact: cleanup, no functional change
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
CC: Tejun Heo <tj@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2612 lines
69 KiB
C
2612 lines
69 KiB
C
/*
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* USB driver for Gigaset 307x base via direct USB connection.
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*
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* Copyright (c) 2001 by Hansjoerg Lipp <hjlipp@web.de>,
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* Tilman Schmidt <tilman@imap.cc>,
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* Stefan Eilers.
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*
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* =====================================================================
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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* =====================================================================
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*/
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#include "gigaset.h"
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#include <linux/usb.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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/* Version Information */
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#define DRIVER_AUTHOR "Tilman Schmidt <tilman@imap.cc>, Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers"
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#define DRIVER_DESC "USB Driver for Gigaset 307x"
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/* Module parameters */
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static int startmode = SM_ISDN;
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static int cidmode = 1;
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module_param(startmode, int, S_IRUGO);
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module_param(cidmode, int, S_IRUGO);
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MODULE_PARM_DESC(startmode, "start in isdn4linux mode");
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MODULE_PARM_DESC(cidmode, "Call-ID mode");
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#define GIGASET_MINORS 1
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#define GIGASET_MINOR 16
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#define GIGASET_MODULENAME "bas_gigaset"
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#define GIGASET_DEVNAME "ttyGB"
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/* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */
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#define IF_WRITEBUF 264
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/* interrupt pipe message size according to ibid. ch. 2.2 */
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#define IP_MSGSIZE 3
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/* Values for the Gigaset 307x */
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#define USB_GIGA_VENDOR_ID 0x0681
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#define USB_3070_PRODUCT_ID 0x0001
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#define USB_3075_PRODUCT_ID 0x0002
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#define USB_SX303_PRODUCT_ID 0x0021
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#define USB_SX353_PRODUCT_ID 0x0022
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/* table of devices that work with this driver */
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static const struct usb_device_id gigaset_table[] = {
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{ USB_DEVICE(USB_GIGA_VENDOR_ID, USB_3070_PRODUCT_ID) },
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{ USB_DEVICE(USB_GIGA_VENDOR_ID, USB_3075_PRODUCT_ID) },
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{ USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX303_PRODUCT_ID) },
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{ USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX353_PRODUCT_ID) },
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, gigaset_table);
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/*======================= local function prototypes ==========================*/
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/* function called if a new device belonging to this driver is connected */
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static int gigaset_probe(struct usb_interface *interface,
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const struct usb_device_id *id);
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/* Function will be called if the device is unplugged */
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static void gigaset_disconnect(struct usb_interface *interface);
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/* functions called before/after suspend */
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static int gigaset_suspend(struct usb_interface *intf, pm_message_t message);
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static int gigaset_resume(struct usb_interface *intf);
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/* functions called before/after device reset */
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static int gigaset_pre_reset(struct usb_interface *intf);
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static int gigaset_post_reset(struct usb_interface *intf);
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static int atread_submit(struct cardstate *, int);
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static void stopurbs(struct bas_bc_state *);
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static int req_submit(struct bc_state *, int, int, int);
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static int atwrite_submit(struct cardstate *, unsigned char *, int);
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static int start_cbsend(struct cardstate *);
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/*============================================================================*/
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struct bas_cardstate {
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struct usb_device *udev; /* USB device pointer */
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struct usb_interface *interface; /* interface for this device */
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unsigned char minor; /* starting minor number */
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struct urb *urb_ctrl; /* control pipe default URB */
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struct usb_ctrlrequest dr_ctrl;
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struct timer_list timer_ctrl; /* control request timeout */
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int retry_ctrl;
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struct timer_list timer_atrdy; /* AT command ready timeout */
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struct urb *urb_cmd_out; /* for sending AT commands */
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struct usb_ctrlrequest dr_cmd_out;
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int retry_cmd_out;
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struct urb *urb_cmd_in; /* for receiving AT replies */
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struct usb_ctrlrequest dr_cmd_in;
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struct timer_list timer_cmd_in; /* receive request timeout */
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unsigned char *rcvbuf; /* AT reply receive buffer */
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struct urb *urb_int_in; /* URB for interrupt pipe */
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unsigned char *int_in_buf;
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spinlock_t lock; /* locks all following */
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int basstate; /* bitmap (BS_*) */
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int pending; /* uncompleted base request */
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wait_queue_head_t waitqueue;
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int rcvbuf_size; /* size of AT receive buffer */
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/* 0: no receive in progress */
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int retry_cmd_in; /* receive req retry count */
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};
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/* status of direct USB connection to 307x base (bits in basstate) */
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#define BS_ATOPEN 0x001 /* AT channel open */
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#define BS_B1OPEN 0x002 /* B channel 1 open */
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#define BS_B2OPEN 0x004 /* B channel 2 open */
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#define BS_ATREADY 0x008 /* base ready for AT command */
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#define BS_INIT 0x010 /* base has signalled INIT_OK */
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#define BS_ATTIMER 0x020 /* waiting for HD_READY_SEND_ATDATA */
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#define BS_ATRDPEND 0x040 /* urb_cmd_in in use */
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#define BS_ATWRPEND 0x080 /* urb_cmd_out in use */
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#define BS_SUSPEND 0x100 /* USB port suspended */
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#define BS_RESETTING 0x200 /* waiting for HD_RESET_INTERRUPT_PIPE_ACK */
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static struct gigaset_driver *driver;
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/* usb specific object needed to register this driver with the usb subsystem */
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static struct usb_driver gigaset_usb_driver = {
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.name = GIGASET_MODULENAME,
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.probe = gigaset_probe,
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.disconnect = gigaset_disconnect,
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.id_table = gigaset_table,
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.suspend = gigaset_suspend,
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.resume = gigaset_resume,
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.reset_resume = gigaset_post_reset,
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.pre_reset = gigaset_pre_reset,
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.post_reset = gigaset_post_reset,
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};
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/* get message text for usb_submit_urb return code
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*/
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static char *get_usb_rcmsg(int rc)
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{
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static char unkmsg[28];
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switch (rc) {
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case 0:
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return "success";
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case -ENOMEM:
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return "out of memory";
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case -ENODEV:
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return "device not present";
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case -ENOENT:
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return "endpoint not present";
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case -ENXIO:
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return "URB type not supported";
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case -EINVAL:
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return "invalid argument";
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case -EAGAIN:
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return "start frame too early or too much scheduled";
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case -EFBIG:
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return "too many isochronous frames requested";
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case -EPIPE:
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return "endpoint stalled";
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case -EMSGSIZE:
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return "invalid packet size";
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case -ENOSPC:
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return "would overcommit USB bandwidth";
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case -ESHUTDOWN:
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return "device shut down";
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case -EPERM:
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return "reject flag set";
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case -EHOSTUNREACH:
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return "device suspended";
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default:
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snprintf(unkmsg, sizeof(unkmsg), "unknown error %d", rc);
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return unkmsg;
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}
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}
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/* get message text for USB status code
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*/
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static char *get_usb_statmsg(int status)
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{
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static char unkmsg[28];
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switch (status) {
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case 0:
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return "success";
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case -ENOENT:
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return "unlinked (sync)";
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case -EINPROGRESS:
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return "pending";
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case -EPROTO:
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return "bit stuffing error, timeout, or unknown USB error";
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case -EILSEQ:
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return "CRC mismatch, timeout, or unknown USB error";
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case -ETIME:
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return "timed out";
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case -EPIPE:
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return "endpoint stalled";
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case -ECOMM:
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return "IN buffer overrun";
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case -ENOSR:
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return "OUT buffer underrun";
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case -EOVERFLOW:
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return "too much data";
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case -EREMOTEIO:
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return "short packet detected";
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case -ENODEV:
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return "device removed";
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case -EXDEV:
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return "partial isochronous transfer";
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case -EINVAL:
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return "invalid argument";
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case -ECONNRESET:
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return "unlinked (async)";
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case -ESHUTDOWN:
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return "device shut down";
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default:
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snprintf(unkmsg, sizeof(unkmsg), "unknown status %d", status);
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return unkmsg;
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}
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}
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/* usb_pipetype_str
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* retrieve string representation of USB pipe type
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*/
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static inline char *usb_pipetype_str(int pipe)
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{
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if (usb_pipeisoc(pipe))
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return "Isoc";
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if (usb_pipeint(pipe))
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return "Int";
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if (usb_pipecontrol(pipe))
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return "Ctrl";
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if (usb_pipebulk(pipe))
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return "Bulk";
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return "?";
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}
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/* dump_urb
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* write content of URB to syslog for debugging
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*/
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static inline void dump_urb(enum debuglevel level, const char *tag,
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struct urb *urb)
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{
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#ifdef CONFIG_GIGASET_DEBUG
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int i;
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gig_dbg(level, "%s urb(0x%08lx)->{", tag, (unsigned long) urb);
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if (urb) {
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gig_dbg(level,
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" dev=0x%08lx, pipe=%s:EP%d/DV%d:%s, "
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"hcpriv=0x%08lx, transfer_flags=0x%x,",
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(unsigned long) urb->dev,
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usb_pipetype_str(urb->pipe),
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usb_pipeendpoint(urb->pipe), usb_pipedevice(urb->pipe),
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usb_pipein(urb->pipe) ? "in" : "out",
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(unsigned long) urb->hcpriv,
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urb->transfer_flags);
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gig_dbg(level,
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" transfer_buffer=0x%08lx[%d], actual_length=%d, "
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"setup_packet=0x%08lx,",
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(unsigned long) urb->transfer_buffer,
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urb->transfer_buffer_length, urb->actual_length,
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(unsigned long) urb->setup_packet);
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gig_dbg(level,
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" start_frame=%d, number_of_packets=%d, interval=%d, "
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"error_count=%d,",
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urb->start_frame, urb->number_of_packets, urb->interval,
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urb->error_count);
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gig_dbg(level,
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" context=0x%08lx, complete=0x%08lx, "
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"iso_frame_desc[]={",
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(unsigned long) urb->context,
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(unsigned long) urb->complete);
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for (i = 0; i < urb->number_of_packets; i++) {
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struct usb_iso_packet_descriptor *pifd
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= &urb->iso_frame_desc[i];
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gig_dbg(level,
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" {offset=%u, length=%u, actual_length=%u, "
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"status=%u}",
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pifd->offset, pifd->length, pifd->actual_length,
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pifd->status);
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}
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}
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gig_dbg(level, "}}");
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#endif
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}
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/* read/set modem control bits etc. (m10x only) */
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static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
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unsigned new_state)
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{
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return -EINVAL;
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}
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static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
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{
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return -EINVAL;
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}
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static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
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{
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return -EINVAL;
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}
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/* set/clear bits in base connection state, return previous state
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*/
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static inline int update_basstate(struct bas_cardstate *ucs,
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int set, int clear)
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{
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unsigned long flags;
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int state;
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spin_lock_irqsave(&ucs->lock, flags);
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state = ucs->basstate;
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ucs->basstate = (state & ~clear) | set;
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spin_unlock_irqrestore(&ucs->lock, flags);
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return state;
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}
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/* error_hangup
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* hang up any existing connection because of an unrecoverable error
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* This function may be called from any context and takes care of scheduling
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* the necessary actions for execution outside of interrupt context.
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* cs->lock must not be held.
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* argument:
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* B channel control structure
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*/
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static inline void error_hangup(struct bc_state *bcs)
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{
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struct cardstate *cs = bcs->cs;
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gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL);
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gigaset_schedule_event(cs);
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}
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/* error_reset
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* reset Gigaset device because of an unrecoverable error
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* This function may be called from any context, and takes care of
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* scheduling the necessary actions for execution outside of interrupt context.
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* cs->lock must not be held.
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* argument:
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* controller state structure
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*/
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static inline void error_reset(struct cardstate *cs)
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{
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/* reset interrupt pipe to recover (ignore errors) */
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update_basstate(cs->hw.bas, BS_RESETTING, 0);
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req_submit(cs->bcs, HD_RESET_INTERRUPT_PIPE, 0, BAS_TIMEOUT);
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}
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/* check_pending
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* check for completion of pending control request
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* parameter:
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* ucs hardware specific controller state structure
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*/
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static void check_pending(struct bas_cardstate *ucs)
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{
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unsigned long flags;
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spin_lock_irqsave(&ucs->lock, flags);
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switch (ucs->pending) {
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case 0:
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break;
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case HD_OPEN_ATCHANNEL:
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if (ucs->basstate & BS_ATOPEN)
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ucs->pending = 0;
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break;
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case HD_OPEN_B1CHANNEL:
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if (ucs->basstate & BS_B1OPEN)
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ucs->pending = 0;
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break;
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case HD_OPEN_B2CHANNEL:
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if (ucs->basstate & BS_B2OPEN)
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ucs->pending = 0;
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break;
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case HD_CLOSE_ATCHANNEL:
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if (!(ucs->basstate & BS_ATOPEN))
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ucs->pending = 0;
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break;
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case HD_CLOSE_B1CHANNEL:
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if (!(ucs->basstate & BS_B1OPEN))
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ucs->pending = 0;
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break;
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case HD_CLOSE_B2CHANNEL:
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if (!(ucs->basstate & BS_B2OPEN))
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ucs->pending = 0;
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break;
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case HD_DEVICE_INIT_ACK: /* no reply expected */
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ucs->pending = 0;
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break;
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case HD_RESET_INTERRUPT_PIPE:
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if (!(ucs->basstate & BS_RESETTING))
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ucs->pending = 0;
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break;
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/*
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* HD_READ_ATMESSAGE and HD_WRITE_ATMESSAGE are handled separately
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* and should never end up here
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*/
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default:
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dev_warn(&ucs->interface->dev,
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"unknown pending request 0x%02x cleared\n",
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ucs->pending);
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ucs->pending = 0;
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}
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if (!ucs->pending)
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del_timer(&ucs->timer_ctrl);
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spin_unlock_irqrestore(&ucs->lock, flags);
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}
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/* cmd_in_timeout
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* timeout routine for command input request
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* argument:
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* controller state structure
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*/
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static void cmd_in_timeout(unsigned long data)
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{
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struct cardstate *cs = (struct cardstate *) data;
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struct bas_cardstate *ucs = cs->hw.bas;
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int rc;
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if (!ucs->rcvbuf_size) {
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gig_dbg(DEBUG_USBREQ, "%s: no receive in progress", __func__);
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return;
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}
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if (ucs->retry_cmd_in++ < BAS_RETRY) {
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dev_notice(cs->dev, "control read: timeout, retry %d\n",
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ucs->retry_cmd_in);
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rc = atread_submit(cs, BAS_TIMEOUT);
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if (rc >= 0 || rc == -ENODEV)
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/* resubmitted or disconnected */
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/* - bypass regular exit block */
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return;
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} else {
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dev_err(cs->dev,
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"control read: timeout, giving up after %d tries\n",
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ucs->retry_cmd_in);
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}
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kfree(ucs->rcvbuf);
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ucs->rcvbuf = NULL;
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ucs->rcvbuf_size = 0;
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error_reset(cs);
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}
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/* read_ctrl_callback
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* USB completion handler for control pipe input
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* called by the USB subsystem in interrupt context
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* parameter:
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* urb USB request block
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* urb->context = inbuf structure for controller state
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*/
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static void read_ctrl_callback(struct urb *urb)
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{
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struct inbuf_t *inbuf = urb->context;
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struct cardstate *cs = inbuf->cs;
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struct bas_cardstate *ucs = cs->hw.bas;
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int status = urb->status;
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int have_data = 0;
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unsigned numbytes;
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int rc;
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update_basstate(ucs, 0, BS_ATRDPEND);
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wake_up(&ucs->waitqueue);
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if (!ucs->rcvbuf_size) {
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dev_warn(cs->dev, "%s: no receive in progress\n", __func__);
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return;
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}
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del_timer(&ucs->timer_cmd_in);
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switch (status) {
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case 0: /* normal completion */
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numbytes = urb->actual_length;
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if (unlikely(numbytes != ucs->rcvbuf_size)) {
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dev_warn(cs->dev,
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"control read: received %d chars, expected %d\n",
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numbytes, ucs->rcvbuf_size);
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if (numbytes > ucs->rcvbuf_size)
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numbytes = ucs->rcvbuf_size;
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}
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/* copy received bytes to inbuf */
|
|
have_data = gigaset_fill_inbuf(inbuf, ucs->rcvbuf, numbytes);
|
|
|
|
if (unlikely(numbytes < ucs->rcvbuf_size)) {
|
|
/* incomplete - resubmit for remaining bytes */
|
|
ucs->rcvbuf_size -= numbytes;
|
|
ucs->retry_cmd_in = 0;
|
|
rc = atread_submit(cs, BAS_TIMEOUT);
|
|
if (rc >= 0 || rc == -ENODEV)
|
|
/* resubmitted or disconnected */
|
|
/* - bypass regular exit block */
|
|
return;
|
|
error_reset(cs);
|
|
}
|
|
break;
|
|
|
|
case -ENOENT: /* cancelled */
|
|
case -ECONNRESET: /* cancelled (async) */
|
|
case -EINPROGRESS: /* pending */
|
|
case -ENODEV: /* device removed */
|
|
case -ESHUTDOWN: /* device shut down */
|
|
/* no action necessary */
|
|
gig_dbg(DEBUG_USBREQ, "%s: %s",
|
|
__func__, get_usb_statmsg(status));
|
|
break;
|
|
|
|
default: /* severe trouble */
|
|
dev_warn(cs->dev, "control read: %s\n",
|
|
get_usb_statmsg(status));
|
|
if (ucs->retry_cmd_in++ < BAS_RETRY) {
|
|
dev_notice(cs->dev, "control read: retry %d\n",
|
|
ucs->retry_cmd_in);
|
|
rc = atread_submit(cs, BAS_TIMEOUT);
|
|
if (rc >= 0 || rc == -ENODEV)
|
|
/* resubmitted or disconnected */
|
|
/* - bypass regular exit block */
|
|
return;
|
|
} else {
|
|
dev_err(cs->dev,
|
|
"control read: giving up after %d tries\n",
|
|
ucs->retry_cmd_in);
|
|
}
|
|
error_reset(cs);
|
|
}
|
|
|
|
kfree(ucs->rcvbuf);
|
|
ucs->rcvbuf = NULL;
|
|
ucs->rcvbuf_size = 0;
|
|
if (have_data) {
|
|
gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
|
|
gigaset_schedule_event(cs);
|
|
}
|
|
}
|
|
|
|
/* atread_submit
|
|
* submit an HD_READ_ATMESSAGE command URB and optionally start a timeout
|
|
* parameters:
|
|
* cs controller state structure
|
|
* timeout timeout in 1/10 sec., 0: none
|
|
* return value:
|
|
* 0 on success
|
|
* -EBUSY if another request is pending
|
|
* any URB submission error code
|
|
*/
|
|
static int atread_submit(struct cardstate *cs, int timeout)
|
|
{
|
|
struct bas_cardstate *ucs = cs->hw.bas;
|
|
int basstate;
|
|
int ret;
|
|
|
|
gig_dbg(DEBUG_USBREQ, "-------> HD_READ_ATMESSAGE (%d)",
|
|
ucs->rcvbuf_size);
|
|
|
|
basstate = update_basstate(ucs, BS_ATRDPEND, 0);
|
|
if (basstate & BS_ATRDPEND) {
|
|
dev_err(cs->dev,
|
|
"could not submit HD_READ_ATMESSAGE: URB busy\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (basstate & BS_SUSPEND) {
|
|
dev_notice(cs->dev,
|
|
"HD_READ_ATMESSAGE not submitted, "
|
|
"suspend in progress\n");
|
|
update_basstate(ucs, 0, BS_ATRDPEND);
|
|
/* treat like disconnect */
|
|
return -ENODEV;
|
|
}
|
|
|
|
ucs->dr_cmd_in.bRequestType = IN_VENDOR_REQ;
|
|
ucs->dr_cmd_in.bRequest = HD_READ_ATMESSAGE;
|
|
ucs->dr_cmd_in.wValue = 0;
|
|
ucs->dr_cmd_in.wIndex = 0;
|
|
ucs->dr_cmd_in.wLength = cpu_to_le16(ucs->rcvbuf_size);
|
|
usb_fill_control_urb(ucs->urb_cmd_in, ucs->udev,
|
|
usb_rcvctrlpipe(ucs->udev, 0),
|
|
(unsigned char *) &ucs->dr_cmd_in,
|
|
ucs->rcvbuf, ucs->rcvbuf_size,
|
|
read_ctrl_callback, cs->inbuf);
|
|
|
|
ret = usb_submit_urb(ucs->urb_cmd_in, GFP_ATOMIC);
|
|
if (ret != 0) {
|
|
update_basstate(ucs, 0, BS_ATRDPEND);
|
|
dev_err(cs->dev, "could not submit HD_READ_ATMESSAGE: %s\n",
|
|
get_usb_rcmsg(ret));
|
|
return ret;
|
|
}
|
|
|
|
if (timeout > 0) {
|
|
gig_dbg(DEBUG_USBREQ, "setting timeout of %d/10 secs", timeout);
|
|
ucs->timer_cmd_in.expires = jiffies + timeout * HZ / 10;
|
|
ucs->timer_cmd_in.data = (unsigned long) cs;
|
|
ucs->timer_cmd_in.function = cmd_in_timeout;
|
|
add_timer(&ucs->timer_cmd_in);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* read_int_callback
|
|
* USB completion handler for interrupt pipe input
|
|
* called by the USB subsystem in interrupt context
|
|
* parameter:
|
|
* urb USB request block
|
|
* urb->context = controller state structure
|
|
*/
|
|
static void read_int_callback(struct urb *urb)
|
|
{
|
|
struct cardstate *cs = urb->context;
|
|
struct bas_cardstate *ucs = cs->hw.bas;
|
|
struct bc_state *bcs;
|
|
int status = urb->status;
|
|
unsigned long flags;
|
|
int rc;
|
|
unsigned l;
|
|
int channel;
|
|
|
|
switch (status) {
|
|
case 0: /* success */
|
|
break;
|
|
case -ENOENT: /* cancelled */
|
|
case -ECONNRESET: /* cancelled (async) */
|
|
case -EINPROGRESS: /* pending */
|
|
/* ignore silently */
|
|
gig_dbg(DEBUG_USBREQ, "%s: %s",
|
|
__func__, get_usb_statmsg(status));
|
|
return;
|
|
case -ENODEV: /* device removed */
|
|
case -ESHUTDOWN: /* device shut down */
|
|
gig_dbg(DEBUG_USBREQ, "%s: device disconnected", __func__);
|
|
return;
|
|
default: /* severe trouble */
|
|
dev_warn(cs->dev, "interrupt read: %s\n",
|
|
get_usb_statmsg(status));
|
|
goto resubmit;
|
|
}
|
|
|
|
/* drop incomplete packets even if the missing bytes wouldn't matter */
|
|
if (unlikely(urb->actual_length < IP_MSGSIZE)) {
|
|
dev_warn(cs->dev, "incomplete interrupt packet (%d bytes)\n",
|
|
urb->actual_length);
|
|
goto resubmit;
|
|
}
|
|
|
|
l = (unsigned) ucs->int_in_buf[1] +
|
|
(((unsigned) ucs->int_in_buf[2]) << 8);
|
|
|
|
gig_dbg(DEBUG_USBREQ, "<-------%d: 0x%02x (%u [0x%02x 0x%02x])",
|
|
urb->actual_length, (int)ucs->int_in_buf[0], l,
|
|
(int)ucs->int_in_buf[1], (int)ucs->int_in_buf[2]);
|
|
|
|
channel = 0;
|
|
|
|
switch (ucs->int_in_buf[0]) {
|
|
case HD_DEVICE_INIT_OK:
|
|
update_basstate(ucs, BS_INIT, 0);
|
|
break;
|
|
|
|
case HD_READY_SEND_ATDATA:
|
|
del_timer(&ucs->timer_atrdy);
|
|
update_basstate(ucs, BS_ATREADY, BS_ATTIMER);
|
|
start_cbsend(cs);
|
|
break;
|
|
|
|
case HD_OPEN_B2CHANNEL_ACK:
|
|
++channel;
|
|
case HD_OPEN_B1CHANNEL_ACK:
|
|
bcs = cs->bcs + channel;
|
|
update_basstate(ucs, BS_B1OPEN << channel, 0);
|
|
gigaset_bchannel_up(bcs);
|
|
break;
|
|
|
|
case HD_OPEN_ATCHANNEL_ACK:
|
|
update_basstate(ucs, BS_ATOPEN, 0);
|
|
start_cbsend(cs);
|
|
break;
|
|
|
|
case HD_CLOSE_B2CHANNEL_ACK:
|
|
++channel;
|
|
case HD_CLOSE_B1CHANNEL_ACK:
|
|
bcs = cs->bcs + channel;
|
|
update_basstate(ucs, 0, BS_B1OPEN << channel);
|
|
stopurbs(bcs->hw.bas);
|
|
gigaset_bchannel_down(bcs);
|
|
break;
|
|
|
|
case HD_CLOSE_ATCHANNEL_ACK:
|
|
update_basstate(ucs, 0, BS_ATOPEN);
|
|
break;
|
|
|
|
case HD_B2_FLOW_CONTROL:
|
|
++channel;
|
|
case HD_B1_FLOW_CONTROL:
|
|
bcs = cs->bcs + channel;
|
|
atomic_add((l - BAS_NORMFRAME) * BAS_CORRFRAMES,
|
|
&bcs->hw.bas->corrbytes);
|
|
gig_dbg(DEBUG_ISO,
|
|
"Flow control (channel %d, sub %d): 0x%02x => %d",
|
|
channel, bcs->hw.bas->numsub, l,
|
|
atomic_read(&bcs->hw.bas->corrbytes));
|
|
break;
|
|
|
|
case HD_RECEIVEATDATA_ACK: /* AT response ready to be received */
|
|
if (!l) {
|
|
dev_warn(cs->dev,
|
|
"HD_RECEIVEATDATA_ACK with length 0 ignored\n");
|
|
break;
|
|
}
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
if (ucs->rcvbuf_size) {
|
|
/* throw away previous buffer - we have no queue */
|
|
dev_err(cs->dev,
|
|
"receive AT data overrun, %d bytes lost\n",
|
|
ucs->rcvbuf_size);
|
|
kfree(ucs->rcvbuf);
|
|
ucs->rcvbuf_size = 0;
|
|
}
|
|
ucs->rcvbuf = kmalloc(l, GFP_ATOMIC);
|
|
if (ucs->rcvbuf == NULL) {
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
dev_err(cs->dev, "out of memory receiving AT data\n");
|
|
error_reset(cs);
|
|
break;
|
|
}
|
|
ucs->rcvbuf_size = l;
|
|
ucs->retry_cmd_in = 0;
|
|
rc = atread_submit(cs, BAS_TIMEOUT);
|
|
if (rc < 0) {
|
|
kfree(ucs->rcvbuf);
|
|
ucs->rcvbuf = NULL;
|
|
ucs->rcvbuf_size = 0;
|
|
if (rc != -ENODEV) {
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
error_reset(cs);
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
break;
|
|
|
|
case HD_RESET_INTERRUPT_PIPE_ACK:
|
|
update_basstate(ucs, 0, BS_RESETTING);
|
|
dev_notice(cs->dev, "interrupt pipe reset\n");
|
|
break;
|
|
|
|
case HD_SUSPEND_END:
|
|
gig_dbg(DEBUG_USBREQ, "HD_SUSPEND_END");
|
|
break;
|
|
|
|
default:
|
|
dev_warn(cs->dev,
|
|
"unknown Gigaset signal 0x%02x (%u) ignored\n",
|
|
(int) ucs->int_in_buf[0], l);
|
|
}
|
|
|
|
check_pending(ucs);
|
|
wake_up(&ucs->waitqueue);
|
|
|
|
resubmit:
|
|
rc = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (unlikely(rc != 0 && rc != -ENODEV)) {
|
|
dev_err(cs->dev, "could not resubmit interrupt URB: %s\n",
|
|
get_usb_rcmsg(rc));
|
|
error_reset(cs);
|
|
}
|
|
}
|
|
|
|
/* read_iso_callback
|
|
* USB completion handler for B channel isochronous input
|
|
* called by the USB subsystem in interrupt context
|
|
* parameter:
|
|
* urb USB request block of completed request
|
|
* urb->context = bc_state structure
|
|
*/
|
|
static void read_iso_callback(struct urb *urb)
|
|
{
|
|
struct bc_state *bcs;
|
|
struct bas_bc_state *ubc;
|
|
int status = urb->status;
|
|
unsigned long flags;
|
|
int i, rc;
|
|
|
|
/* status codes not worth bothering the tasklet with */
|
|
if (unlikely(status == -ENOENT ||
|
|
status == -ECONNRESET ||
|
|
status == -EINPROGRESS ||
|
|
status == -ENODEV ||
|
|
status == -ESHUTDOWN)) {
|
|
gig_dbg(DEBUG_ISO, "%s: %s",
|
|
__func__, get_usb_statmsg(status));
|
|
return;
|
|
}
|
|
|
|
bcs = urb->context;
|
|
ubc = bcs->hw.bas;
|
|
|
|
spin_lock_irqsave(&ubc->isoinlock, flags);
|
|
if (likely(ubc->isoindone == NULL)) {
|
|
/* pass URB to tasklet */
|
|
ubc->isoindone = urb;
|
|
ubc->isoinstatus = status;
|
|
tasklet_hi_schedule(&ubc->rcvd_tasklet);
|
|
} else {
|
|
/* tasklet still busy, drop data and resubmit URB */
|
|
ubc->loststatus = status;
|
|
for (i = 0; i < BAS_NUMFRAMES; i++) {
|
|
ubc->isoinlost += urb->iso_frame_desc[i].actual_length;
|
|
if (unlikely(urb->iso_frame_desc[i].status != 0 &&
|
|
urb->iso_frame_desc[i].status !=
|
|
-EINPROGRESS))
|
|
ubc->loststatus = urb->iso_frame_desc[i].status;
|
|
urb->iso_frame_desc[i].status = 0;
|
|
urb->iso_frame_desc[i].actual_length = 0;
|
|
}
|
|
if (likely(ubc->running)) {
|
|
/* urb->dev is clobbered by USB subsystem */
|
|
urb->dev = bcs->cs->hw.bas->udev;
|
|
urb->transfer_flags = URB_ISO_ASAP;
|
|
urb->number_of_packets = BAS_NUMFRAMES;
|
|
gig_dbg(DEBUG_ISO, "%s: isoc read overrun/resubmit",
|
|
__func__);
|
|
rc = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (unlikely(rc != 0 && rc != -ENODEV)) {
|
|
dev_err(bcs->cs->dev,
|
|
"could not resubmit isochronous read "
|
|
"URB: %s\n", get_usb_rcmsg(rc));
|
|
dump_urb(DEBUG_ISO, "isoc read", urb);
|
|
error_hangup(bcs);
|
|
}
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&ubc->isoinlock, flags);
|
|
}
|
|
|
|
/* write_iso_callback
|
|
* USB completion handler for B channel isochronous output
|
|
* called by the USB subsystem in interrupt context
|
|
* parameter:
|
|
* urb USB request block of completed request
|
|
* urb->context = isow_urbctx_t structure
|
|
*/
|
|
static void write_iso_callback(struct urb *urb)
|
|
{
|
|
struct isow_urbctx_t *ucx;
|
|
struct bas_bc_state *ubc;
|
|
int status = urb->status;
|
|
unsigned long flags;
|
|
|
|
/* status codes not worth bothering the tasklet with */
|
|
if (unlikely(status == -ENOENT ||
|
|
status == -ECONNRESET ||
|
|
status == -EINPROGRESS ||
|
|
status == -ENODEV ||
|
|
status == -ESHUTDOWN)) {
|
|
gig_dbg(DEBUG_ISO, "%s: %s",
|
|
__func__, get_usb_statmsg(status));
|
|
return;
|
|
}
|
|
|
|
/* pass URB context to tasklet */
|
|
ucx = urb->context;
|
|
ubc = ucx->bcs->hw.bas;
|
|
ucx->status = status;
|
|
|
|
spin_lock_irqsave(&ubc->isooutlock, flags);
|
|
ubc->isooutovfl = ubc->isooutdone;
|
|
ubc->isooutdone = ucx;
|
|
spin_unlock_irqrestore(&ubc->isooutlock, flags);
|
|
tasklet_hi_schedule(&ubc->sent_tasklet);
|
|
}
|
|
|
|
/* starturbs
|
|
* prepare and submit USB request blocks for isochronous input and output
|
|
* argument:
|
|
* B channel control structure
|
|
* return value:
|
|
* 0 on success
|
|
* < 0 on error (no URBs submitted)
|
|
*/
|
|
static int starturbs(struct bc_state *bcs)
|
|
{
|
|
struct bas_bc_state *ubc = bcs->hw.bas;
|
|
struct urb *urb;
|
|
int j, k;
|
|
int rc;
|
|
|
|
/* initialize L2 reception */
|
|
if (bcs->proto2 == L2_HDLC)
|
|
bcs->inputstate |= INS_flag_hunt;
|
|
|
|
/* submit all isochronous input URBs */
|
|
ubc->running = 1;
|
|
for (k = 0; k < BAS_INURBS; k++) {
|
|
urb = ubc->isoinurbs[k];
|
|
if (!urb) {
|
|
rc = -EFAULT;
|
|
goto error;
|
|
}
|
|
|
|
urb->dev = bcs->cs->hw.bas->udev;
|
|
urb->pipe = usb_rcvisocpipe(urb->dev, 3 + 2 * bcs->channel);
|
|
urb->transfer_flags = URB_ISO_ASAP;
|
|
urb->transfer_buffer = ubc->isoinbuf + k * BAS_INBUFSIZE;
|
|
urb->transfer_buffer_length = BAS_INBUFSIZE;
|
|
urb->number_of_packets = BAS_NUMFRAMES;
|
|
urb->interval = BAS_FRAMETIME;
|
|
urb->complete = read_iso_callback;
|
|
urb->context = bcs;
|
|
for (j = 0; j < BAS_NUMFRAMES; j++) {
|
|
urb->iso_frame_desc[j].offset = j * BAS_MAXFRAME;
|
|
urb->iso_frame_desc[j].length = BAS_MAXFRAME;
|
|
urb->iso_frame_desc[j].status = 0;
|
|
urb->iso_frame_desc[j].actual_length = 0;
|
|
}
|
|
|
|
dump_urb(DEBUG_ISO, "Initial isoc read", urb);
|
|
rc = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (rc != 0)
|
|
goto error;
|
|
}
|
|
|
|
/* initialize L2 transmission */
|
|
gigaset_isowbuf_init(ubc->isooutbuf, PPP_FLAG);
|
|
|
|
/* set up isochronous output URBs for flag idling */
|
|
for (k = 0; k < BAS_OUTURBS; ++k) {
|
|
urb = ubc->isoouturbs[k].urb;
|
|
if (!urb) {
|
|
rc = -EFAULT;
|
|
goto error;
|
|
}
|
|
urb->dev = bcs->cs->hw.bas->udev;
|
|
urb->pipe = usb_sndisocpipe(urb->dev, 4 + 2 * bcs->channel);
|
|
urb->transfer_flags = URB_ISO_ASAP;
|
|
urb->transfer_buffer = ubc->isooutbuf->data;
|
|
urb->transfer_buffer_length = sizeof(ubc->isooutbuf->data);
|
|
urb->number_of_packets = BAS_NUMFRAMES;
|
|
urb->interval = BAS_FRAMETIME;
|
|
urb->complete = write_iso_callback;
|
|
urb->context = &ubc->isoouturbs[k];
|
|
for (j = 0; j < BAS_NUMFRAMES; ++j) {
|
|
urb->iso_frame_desc[j].offset = BAS_OUTBUFSIZE;
|
|
urb->iso_frame_desc[j].length = BAS_NORMFRAME;
|
|
urb->iso_frame_desc[j].status = 0;
|
|
urb->iso_frame_desc[j].actual_length = 0;
|
|
}
|
|
ubc->isoouturbs[k].limit = -1;
|
|
}
|
|
|
|
/* keep one URB free, submit the others */
|
|
for (k = 0; k < BAS_OUTURBS-1; ++k) {
|
|
dump_urb(DEBUG_ISO, "Initial isoc write", urb);
|
|
rc = usb_submit_urb(ubc->isoouturbs[k].urb, GFP_ATOMIC);
|
|
if (rc != 0)
|
|
goto error;
|
|
}
|
|
dump_urb(DEBUG_ISO, "Initial isoc write (free)", urb);
|
|
ubc->isooutfree = &ubc->isoouturbs[BAS_OUTURBS-1];
|
|
ubc->isooutdone = ubc->isooutovfl = NULL;
|
|
return 0;
|
|
error:
|
|
stopurbs(ubc);
|
|
return rc;
|
|
}
|
|
|
|
/* stopurbs
|
|
* cancel the USB request blocks for isochronous input and output
|
|
* errors are silently ignored
|
|
* argument:
|
|
* B channel control structure
|
|
*/
|
|
static void stopurbs(struct bas_bc_state *ubc)
|
|
{
|
|
int k, rc;
|
|
|
|
ubc->running = 0;
|
|
|
|
for (k = 0; k < BAS_INURBS; ++k) {
|
|
rc = usb_unlink_urb(ubc->isoinurbs[k]);
|
|
gig_dbg(DEBUG_ISO,
|
|
"%s: isoc input URB %d unlinked, result = %s",
|
|
__func__, k, get_usb_rcmsg(rc));
|
|
}
|
|
|
|
for (k = 0; k < BAS_OUTURBS; ++k) {
|
|
rc = usb_unlink_urb(ubc->isoouturbs[k].urb);
|
|
gig_dbg(DEBUG_ISO,
|
|
"%s: isoc output URB %d unlinked, result = %s",
|
|
__func__, k, get_usb_rcmsg(rc));
|
|
}
|
|
}
|
|
|
|
/* Isochronous Write - Bottom Half */
|
|
/* =============================== */
|
|
|
|
/* submit_iso_write_urb
|
|
* fill and submit the next isochronous write URB
|
|
* parameters:
|
|
* ucx context structure containing URB
|
|
* return value:
|
|
* number of frames submitted in URB
|
|
* 0 if URB not submitted because no data available (isooutbuf busy)
|
|
* error code < 0 on error
|
|
*/
|
|
static int submit_iso_write_urb(struct isow_urbctx_t *ucx)
|
|
{
|
|
struct urb *urb = ucx->urb;
|
|
struct bas_bc_state *ubc = ucx->bcs->hw.bas;
|
|
struct usb_iso_packet_descriptor *ifd;
|
|
int corrbytes, nframe, rc;
|
|
|
|
/* urb->dev is clobbered by USB subsystem */
|
|
urb->dev = ucx->bcs->cs->hw.bas->udev;
|
|
urb->transfer_flags = URB_ISO_ASAP;
|
|
urb->transfer_buffer = ubc->isooutbuf->data;
|
|
urb->transfer_buffer_length = sizeof(ubc->isooutbuf->data);
|
|
|
|
for (nframe = 0; nframe < BAS_NUMFRAMES; nframe++) {
|
|
ifd = &urb->iso_frame_desc[nframe];
|
|
|
|
/* compute frame length according to flow control */
|
|
ifd->length = BAS_NORMFRAME;
|
|
corrbytes = atomic_read(&ubc->corrbytes);
|
|
if (corrbytes != 0) {
|
|
gig_dbg(DEBUG_ISO, "%s: corrbytes=%d",
|
|
__func__, corrbytes);
|
|
if (corrbytes > BAS_HIGHFRAME - BAS_NORMFRAME)
|
|
corrbytes = BAS_HIGHFRAME - BAS_NORMFRAME;
|
|
else if (corrbytes < BAS_LOWFRAME - BAS_NORMFRAME)
|
|
corrbytes = BAS_LOWFRAME - BAS_NORMFRAME;
|
|
ifd->length += corrbytes;
|
|
atomic_add(-corrbytes, &ubc->corrbytes);
|
|
}
|
|
|
|
/* retrieve block of data to send */
|
|
rc = gigaset_isowbuf_getbytes(ubc->isooutbuf, ifd->length);
|
|
if (rc < 0) {
|
|
if (rc == -EBUSY) {
|
|
gig_dbg(DEBUG_ISO,
|
|
"%s: buffer busy at frame %d",
|
|
__func__, nframe);
|
|
/* tasklet will be restarted from
|
|
gigaset_isoc_send_skb() */
|
|
} else {
|
|
dev_err(ucx->bcs->cs->dev,
|
|
"%s: buffer error %d at frame %d\n",
|
|
__func__, rc, nframe);
|
|
return rc;
|
|
}
|
|
break;
|
|
}
|
|
ifd->offset = rc;
|
|
ucx->limit = ubc->isooutbuf->nextread;
|
|
ifd->status = 0;
|
|
ifd->actual_length = 0;
|
|
}
|
|
if (unlikely(nframe == 0))
|
|
return 0; /* no data to send */
|
|
urb->number_of_packets = nframe;
|
|
|
|
rc = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (unlikely(rc)) {
|
|
if (rc == -ENODEV)
|
|
/* device removed - give up silently */
|
|
gig_dbg(DEBUG_ISO, "%s: disconnected", __func__);
|
|
else
|
|
dev_err(ucx->bcs->cs->dev,
|
|
"could not submit isochronous write URB: %s\n",
|
|
get_usb_rcmsg(rc));
|
|
return rc;
|
|
}
|
|
++ubc->numsub;
|
|
return nframe;
|
|
}
|
|
|
|
/* write_iso_tasklet
|
|
* tasklet scheduled when an isochronous output URB from the Gigaset device
|
|
* has completed
|
|
* parameter:
|
|
* data B channel state structure
|
|
*/
|
|
static void write_iso_tasklet(unsigned long data)
|
|
{
|
|
struct bc_state *bcs = (struct bc_state *) data;
|
|
struct bas_bc_state *ubc = bcs->hw.bas;
|
|
struct cardstate *cs = bcs->cs;
|
|
struct isow_urbctx_t *done, *next, *ovfl;
|
|
struct urb *urb;
|
|
int status;
|
|
struct usb_iso_packet_descriptor *ifd;
|
|
int offset;
|
|
unsigned long flags;
|
|
int i;
|
|
struct sk_buff *skb;
|
|
int len;
|
|
int rc;
|
|
|
|
/* loop while completed URBs arrive in time */
|
|
for (;;) {
|
|
if (unlikely(!(ubc->running))) {
|
|
gig_dbg(DEBUG_ISO, "%s: not running", __func__);
|
|
return;
|
|
}
|
|
|
|
/* retrieve completed URBs */
|
|
spin_lock_irqsave(&ubc->isooutlock, flags);
|
|
done = ubc->isooutdone;
|
|
ubc->isooutdone = NULL;
|
|
ovfl = ubc->isooutovfl;
|
|
ubc->isooutovfl = NULL;
|
|
spin_unlock_irqrestore(&ubc->isooutlock, flags);
|
|
if (ovfl) {
|
|
dev_err(cs->dev, "isochronous write buffer underrun\n");
|
|
error_hangup(bcs);
|
|
break;
|
|
}
|
|
if (!done)
|
|
break;
|
|
|
|
/* submit free URB if available */
|
|
spin_lock_irqsave(&ubc->isooutlock, flags);
|
|
next = ubc->isooutfree;
|
|
ubc->isooutfree = NULL;
|
|
spin_unlock_irqrestore(&ubc->isooutlock, flags);
|
|
if (next) {
|
|
rc = submit_iso_write_urb(next);
|
|
if (unlikely(rc <= 0 && rc != -ENODEV)) {
|
|
/* could not submit URB, put it back */
|
|
spin_lock_irqsave(&ubc->isooutlock, flags);
|
|
if (ubc->isooutfree == NULL) {
|
|
ubc->isooutfree = next;
|
|
next = NULL;
|
|
}
|
|
spin_unlock_irqrestore(&ubc->isooutlock, flags);
|
|
if (next) {
|
|
/* couldn't put it back */
|
|
dev_err(cs->dev,
|
|
"losing isochronous write URB\n");
|
|
error_hangup(bcs);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* process completed URB */
|
|
urb = done->urb;
|
|
status = done->status;
|
|
switch (status) {
|
|
case -EXDEV: /* partial completion */
|
|
gig_dbg(DEBUG_ISO, "%s: URB partially completed",
|
|
__func__);
|
|
/* fall through - what's the difference anyway? */
|
|
case 0: /* normal completion */
|
|
/* inspect individual frames
|
|
* assumptions (for lack of documentation):
|
|
* - actual_length bytes of first frame in error are
|
|
* successfully sent
|
|
* - all following frames are not sent at all
|
|
*/
|
|
offset = done->limit; /* default (no error) */
|
|
for (i = 0; i < BAS_NUMFRAMES; i++) {
|
|
ifd = &urb->iso_frame_desc[i];
|
|
if (ifd->status ||
|
|
ifd->actual_length != ifd->length) {
|
|
dev_warn(cs->dev,
|
|
"isochronous write: frame %d: %s, "
|
|
"only %d of %d bytes sent\n",
|
|
i, get_usb_statmsg(ifd->status),
|
|
ifd->actual_length, ifd->length);
|
|
offset = (ifd->offset +
|
|
ifd->actual_length)
|
|
% BAS_OUTBUFSIZE;
|
|
break;
|
|
}
|
|
}
|
|
#ifdef CONFIG_GIGASET_DEBUG
|
|
/* check assumption on remaining frames */
|
|
for (; i < BAS_NUMFRAMES; i++) {
|
|
ifd = &urb->iso_frame_desc[i];
|
|
if (ifd->status != -EINPROGRESS
|
|
|| ifd->actual_length != 0) {
|
|
dev_warn(cs->dev,
|
|
"isochronous write: frame %d: %s, "
|
|
"%d of %d bytes sent\n",
|
|
i, get_usb_statmsg(ifd->status),
|
|
ifd->actual_length, ifd->length);
|
|
offset = (ifd->offset +
|
|
ifd->actual_length)
|
|
% BAS_OUTBUFSIZE;
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
break;
|
|
case -EPIPE: /* stall - probably underrun */
|
|
dev_err(cs->dev, "isochronous write stalled\n");
|
|
error_hangup(bcs);
|
|
break;
|
|
default: /* severe trouble */
|
|
dev_warn(cs->dev, "isochronous write: %s\n",
|
|
get_usb_statmsg(status));
|
|
}
|
|
|
|
/* mark the write buffer area covered by this URB as free */
|
|
if (done->limit >= 0)
|
|
ubc->isooutbuf->read = done->limit;
|
|
|
|
/* mark URB as free */
|
|
spin_lock_irqsave(&ubc->isooutlock, flags);
|
|
next = ubc->isooutfree;
|
|
ubc->isooutfree = done;
|
|
spin_unlock_irqrestore(&ubc->isooutlock, flags);
|
|
if (next) {
|
|
/* only one URB still active - resubmit one */
|
|
rc = submit_iso_write_urb(next);
|
|
if (unlikely(rc <= 0 && rc != -ENODEV)) {
|
|
/* couldn't submit */
|
|
error_hangup(bcs);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* process queued SKBs */
|
|
while ((skb = skb_dequeue(&bcs->squeue))) {
|
|
/* copy to output buffer, doing L2 encapsulation */
|
|
len = skb->len;
|
|
if (gigaset_isoc_buildframe(bcs, skb->data, len) == -EAGAIN) {
|
|
/* insufficient buffer space, push back onto queue */
|
|
skb_queue_head(&bcs->squeue, skb);
|
|
gig_dbg(DEBUG_ISO, "%s: skb requeued, qlen=%d",
|
|
__func__, skb_queue_len(&bcs->squeue));
|
|
break;
|
|
}
|
|
skb_pull(skb, len);
|
|
gigaset_skb_sent(bcs, skb);
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
}
|
|
|
|
/* Isochronous Read - Bottom Half */
|
|
/* ============================== */
|
|
|
|
/* read_iso_tasklet
|
|
* tasklet scheduled when an isochronous input URB from the Gigaset device
|
|
* has completed
|
|
* parameter:
|
|
* data B channel state structure
|
|
*/
|
|
static void read_iso_tasklet(unsigned long data)
|
|
{
|
|
struct bc_state *bcs = (struct bc_state *) data;
|
|
struct bas_bc_state *ubc = bcs->hw.bas;
|
|
struct cardstate *cs = bcs->cs;
|
|
struct urb *urb;
|
|
int status;
|
|
char *rcvbuf;
|
|
unsigned long flags;
|
|
int totleft, numbytes, offset, frame, rc;
|
|
|
|
/* loop while more completed URBs arrive in the meantime */
|
|
for (;;) {
|
|
/* retrieve URB */
|
|
spin_lock_irqsave(&ubc->isoinlock, flags);
|
|
urb = ubc->isoindone;
|
|
if (!urb) {
|
|
spin_unlock_irqrestore(&ubc->isoinlock, flags);
|
|
return;
|
|
}
|
|
status = ubc->isoinstatus;
|
|
ubc->isoindone = NULL;
|
|
if (unlikely(ubc->loststatus != -EINPROGRESS)) {
|
|
dev_warn(cs->dev,
|
|
"isochronous read overrun, "
|
|
"dropped URB with status: %s, %d bytes lost\n",
|
|
get_usb_statmsg(ubc->loststatus),
|
|
ubc->isoinlost);
|
|
ubc->loststatus = -EINPROGRESS;
|
|
}
|
|
spin_unlock_irqrestore(&ubc->isoinlock, flags);
|
|
|
|
if (unlikely(!(ubc->running))) {
|
|
gig_dbg(DEBUG_ISO,
|
|
"%s: channel not running, "
|
|
"dropped URB with status: %s",
|
|
__func__, get_usb_statmsg(status));
|
|
return;
|
|
}
|
|
|
|
switch (status) {
|
|
case 0: /* normal completion */
|
|
break;
|
|
case -EXDEV: /* inspect individual frames
|
|
(we do that anyway) */
|
|
gig_dbg(DEBUG_ISO, "%s: URB partially completed",
|
|
__func__);
|
|
break;
|
|
case -ENOENT:
|
|
case -ECONNRESET:
|
|
case -EINPROGRESS:
|
|
gig_dbg(DEBUG_ISO, "%s: %s",
|
|
__func__, get_usb_statmsg(status));
|
|
continue; /* -> skip */
|
|
case -EPIPE:
|
|
dev_err(cs->dev, "isochronous read stalled\n");
|
|
error_hangup(bcs);
|
|
continue; /* -> skip */
|
|
default: /* severe trouble */
|
|
dev_warn(cs->dev, "isochronous read: %s\n",
|
|
get_usb_statmsg(status));
|
|
goto error;
|
|
}
|
|
|
|
rcvbuf = urb->transfer_buffer;
|
|
totleft = urb->actual_length;
|
|
for (frame = 0; totleft > 0 && frame < BAS_NUMFRAMES; frame++) {
|
|
numbytes = urb->iso_frame_desc[frame].actual_length;
|
|
if (unlikely(urb->iso_frame_desc[frame].status))
|
|
dev_warn(cs->dev,
|
|
"isochronous read: frame %d[%d]: %s\n",
|
|
frame, numbytes,
|
|
get_usb_statmsg(
|
|
urb->iso_frame_desc[frame].status));
|
|
if (unlikely(numbytes > BAS_MAXFRAME))
|
|
dev_warn(cs->dev,
|
|
"isochronous read: frame %d: "
|
|
"numbytes (%d) > BAS_MAXFRAME\n",
|
|
frame, numbytes);
|
|
if (unlikely(numbytes > totleft)) {
|
|
dev_warn(cs->dev,
|
|
"isochronous read: frame %d: "
|
|
"numbytes (%d) > totleft (%d)\n",
|
|
frame, numbytes, totleft);
|
|
numbytes = totleft;
|
|
}
|
|
offset = urb->iso_frame_desc[frame].offset;
|
|
if (unlikely(offset + numbytes > BAS_INBUFSIZE)) {
|
|
dev_warn(cs->dev,
|
|
"isochronous read: frame %d: "
|
|
"offset (%d) + numbytes (%d) "
|
|
"> BAS_INBUFSIZE\n",
|
|
frame, offset, numbytes);
|
|
numbytes = BAS_INBUFSIZE - offset;
|
|
}
|
|
gigaset_isoc_receive(rcvbuf + offset, numbytes, bcs);
|
|
totleft -= numbytes;
|
|
}
|
|
if (unlikely(totleft > 0))
|
|
dev_warn(cs->dev,
|
|
"isochronous read: %d data bytes missing\n",
|
|
totleft);
|
|
|
|
error:
|
|
/* URB processed, resubmit */
|
|
for (frame = 0; frame < BAS_NUMFRAMES; frame++) {
|
|
urb->iso_frame_desc[frame].status = 0;
|
|
urb->iso_frame_desc[frame].actual_length = 0;
|
|
}
|
|
/* urb->dev is clobbered by USB subsystem */
|
|
urb->dev = bcs->cs->hw.bas->udev;
|
|
urb->transfer_flags = URB_ISO_ASAP;
|
|
urb->number_of_packets = BAS_NUMFRAMES;
|
|
rc = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (unlikely(rc != 0 && rc != -ENODEV)) {
|
|
dev_err(cs->dev,
|
|
"could not resubmit isochronous read URB: %s\n",
|
|
get_usb_rcmsg(rc));
|
|
dump_urb(DEBUG_ISO, "resubmit iso read", urb);
|
|
error_hangup(bcs);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Channel Operations */
|
|
/* ================== */
|
|
|
|
/* req_timeout
|
|
* timeout routine for control output request
|
|
* argument:
|
|
* B channel control structure
|
|
*/
|
|
static void req_timeout(unsigned long data)
|
|
{
|
|
struct bc_state *bcs = (struct bc_state *) data;
|
|
struct bas_cardstate *ucs = bcs->cs->hw.bas;
|
|
int pending;
|
|
unsigned long flags;
|
|
|
|
check_pending(ucs);
|
|
|
|
spin_lock_irqsave(&ucs->lock, flags);
|
|
pending = ucs->pending;
|
|
ucs->pending = 0;
|
|
spin_unlock_irqrestore(&ucs->lock, flags);
|
|
|
|
switch (pending) {
|
|
case 0: /* no pending request */
|
|
gig_dbg(DEBUG_USBREQ, "%s: no request pending", __func__);
|
|
break;
|
|
|
|
case HD_OPEN_ATCHANNEL:
|
|
dev_err(bcs->cs->dev, "timeout opening AT channel\n");
|
|
error_reset(bcs->cs);
|
|
break;
|
|
|
|
case HD_OPEN_B2CHANNEL:
|
|
case HD_OPEN_B1CHANNEL:
|
|
dev_err(bcs->cs->dev, "timeout opening channel %d\n",
|
|
bcs->channel + 1);
|
|
error_hangup(bcs);
|
|
break;
|
|
|
|
case HD_CLOSE_ATCHANNEL:
|
|
dev_err(bcs->cs->dev, "timeout closing AT channel\n");
|
|
error_reset(bcs->cs);
|
|
break;
|
|
|
|
case HD_CLOSE_B2CHANNEL:
|
|
case HD_CLOSE_B1CHANNEL:
|
|
dev_err(bcs->cs->dev, "timeout closing channel %d\n",
|
|
bcs->channel + 1);
|
|
error_reset(bcs->cs);
|
|
break;
|
|
|
|
case HD_RESET_INTERRUPT_PIPE:
|
|
/* error recovery escalation */
|
|
dev_err(bcs->cs->dev,
|
|
"reset interrupt pipe timeout, attempting USB reset\n");
|
|
usb_queue_reset_device(bcs->cs->hw.bas->interface);
|
|
break;
|
|
|
|
default:
|
|
dev_warn(bcs->cs->dev, "request 0x%02x timed out, clearing\n",
|
|
pending);
|
|
}
|
|
|
|
wake_up(&ucs->waitqueue);
|
|
}
|
|
|
|
/* write_ctrl_callback
|
|
* USB completion handler for control pipe output
|
|
* called by the USB subsystem in interrupt context
|
|
* parameter:
|
|
* urb USB request block of completed request
|
|
* urb->context = hardware specific controller state structure
|
|
*/
|
|
static void write_ctrl_callback(struct urb *urb)
|
|
{
|
|
struct bas_cardstate *ucs = urb->context;
|
|
int status = urb->status;
|
|
int rc;
|
|
unsigned long flags;
|
|
|
|
/* check status */
|
|
switch (status) {
|
|
case 0: /* normal completion */
|
|
spin_lock_irqsave(&ucs->lock, flags);
|
|
switch (ucs->pending) {
|
|
case HD_DEVICE_INIT_ACK: /* no reply expected */
|
|
del_timer(&ucs->timer_ctrl);
|
|
ucs->pending = 0;
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&ucs->lock, flags);
|
|
return;
|
|
|
|
case -ENOENT: /* cancelled */
|
|
case -ECONNRESET: /* cancelled (async) */
|
|
case -EINPROGRESS: /* pending */
|
|
case -ENODEV: /* device removed */
|
|
case -ESHUTDOWN: /* device shut down */
|
|
/* ignore silently */
|
|
gig_dbg(DEBUG_USBREQ, "%s: %s",
|
|
__func__, get_usb_statmsg(status));
|
|
break;
|
|
|
|
default: /* any failure */
|
|
/* don't retry if suspend requested */
|
|
if (++ucs->retry_ctrl > BAS_RETRY ||
|
|
(ucs->basstate & BS_SUSPEND)) {
|
|
dev_err(&ucs->interface->dev,
|
|
"control request 0x%02x failed: %s\n",
|
|
ucs->dr_ctrl.bRequest,
|
|
get_usb_statmsg(status));
|
|
break; /* give up */
|
|
}
|
|
dev_notice(&ucs->interface->dev,
|
|
"control request 0x%02x: %s, retry %d\n",
|
|
ucs->dr_ctrl.bRequest, get_usb_statmsg(status),
|
|
ucs->retry_ctrl);
|
|
/* urb->dev is clobbered by USB subsystem */
|
|
urb->dev = ucs->udev;
|
|
rc = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (unlikely(rc)) {
|
|
dev_err(&ucs->interface->dev,
|
|
"could not resubmit request 0x%02x: %s\n",
|
|
ucs->dr_ctrl.bRequest, get_usb_rcmsg(rc));
|
|
break;
|
|
}
|
|
/* resubmitted */
|
|
return;
|
|
}
|
|
|
|
/* failed, clear pending request */
|
|
spin_lock_irqsave(&ucs->lock, flags);
|
|
del_timer(&ucs->timer_ctrl);
|
|
ucs->pending = 0;
|
|
spin_unlock_irqrestore(&ucs->lock, flags);
|
|
wake_up(&ucs->waitqueue);
|
|
}
|
|
|
|
/* req_submit
|
|
* submit a control output request without message buffer to the Gigaset base
|
|
* and optionally start a timeout
|
|
* parameters:
|
|
* bcs B channel control structure
|
|
* req control request code (HD_*)
|
|
* val control request parameter value (set to 0 if unused)
|
|
* timeout timeout in seconds (0: no timeout)
|
|
* return value:
|
|
* 0 on success
|
|
* -EBUSY if another request is pending
|
|
* any URB submission error code
|
|
*/
|
|
static int req_submit(struct bc_state *bcs, int req, int val, int timeout)
|
|
{
|
|
struct bas_cardstate *ucs = bcs->cs->hw.bas;
|
|
int ret;
|
|
unsigned long flags;
|
|
|
|
gig_dbg(DEBUG_USBREQ, "-------> 0x%02x (%d)", req, val);
|
|
|
|
spin_lock_irqsave(&ucs->lock, flags);
|
|
if (ucs->pending) {
|
|
spin_unlock_irqrestore(&ucs->lock, flags);
|
|
dev_err(bcs->cs->dev,
|
|
"submission of request 0x%02x failed: "
|
|
"request 0x%02x still pending\n",
|
|
req, ucs->pending);
|
|
return -EBUSY;
|
|
}
|
|
|
|
ucs->dr_ctrl.bRequestType = OUT_VENDOR_REQ;
|
|
ucs->dr_ctrl.bRequest = req;
|
|
ucs->dr_ctrl.wValue = cpu_to_le16(val);
|
|
ucs->dr_ctrl.wIndex = 0;
|
|
ucs->dr_ctrl.wLength = 0;
|
|
usb_fill_control_urb(ucs->urb_ctrl, ucs->udev,
|
|
usb_sndctrlpipe(ucs->udev, 0),
|
|
(unsigned char *) &ucs->dr_ctrl, NULL, 0,
|
|
write_ctrl_callback, ucs);
|
|
ucs->retry_ctrl = 0;
|
|
ret = usb_submit_urb(ucs->urb_ctrl, GFP_ATOMIC);
|
|
if (unlikely(ret)) {
|
|
dev_err(bcs->cs->dev, "could not submit request 0x%02x: %s\n",
|
|
req, get_usb_rcmsg(ret));
|
|
spin_unlock_irqrestore(&ucs->lock, flags);
|
|
return ret;
|
|
}
|
|
ucs->pending = req;
|
|
|
|
if (timeout > 0) {
|
|
gig_dbg(DEBUG_USBREQ, "setting timeout of %d/10 secs", timeout);
|
|
ucs->timer_ctrl.expires = jiffies + timeout * HZ / 10;
|
|
ucs->timer_ctrl.data = (unsigned long) bcs;
|
|
ucs->timer_ctrl.function = req_timeout;
|
|
add_timer(&ucs->timer_ctrl);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&ucs->lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
/* gigaset_init_bchannel
|
|
* called by common.c to connect a B channel
|
|
* initialize isochronous I/O and tell the Gigaset base to open the channel
|
|
* argument:
|
|
* B channel control structure
|
|
* return value:
|
|
* 0 on success, error code < 0 on error
|
|
*/
|
|
static int gigaset_init_bchannel(struct bc_state *bcs)
|
|
{
|
|
struct cardstate *cs = bcs->cs;
|
|
int req, ret;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
if (unlikely(!cs->connected)) {
|
|
gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__);
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (cs->hw.bas->basstate & BS_SUSPEND) {
|
|
dev_notice(cs->dev,
|
|
"not starting isochronous I/O, "
|
|
"suspend in progress\n");
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
return -EHOSTUNREACH;
|
|
}
|
|
|
|
ret = starturbs(bcs);
|
|
if (ret < 0) {
|
|
dev_err(cs->dev,
|
|
"could not start isochronous I/O for channel B%d: %s\n",
|
|
bcs->channel + 1,
|
|
ret == -EFAULT ? "null URB" : get_usb_rcmsg(ret));
|
|
if (ret != -ENODEV)
|
|
error_hangup(bcs);
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
req = bcs->channel ? HD_OPEN_B2CHANNEL : HD_OPEN_B1CHANNEL;
|
|
ret = req_submit(bcs, req, 0, BAS_TIMEOUT);
|
|
if (ret < 0) {
|
|
dev_err(cs->dev, "could not open channel B%d\n",
|
|
bcs->channel + 1);
|
|
stopurbs(bcs->hw.bas);
|
|
if (ret != -ENODEV)
|
|
error_hangup(bcs);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
/* gigaset_close_bchannel
|
|
* called by common.c to disconnect a B channel
|
|
* tell the Gigaset base to close the channel
|
|
* stopping isochronous I/O and LL notification will be done when the
|
|
* acknowledgement for the close arrives
|
|
* argument:
|
|
* B channel control structure
|
|
* return value:
|
|
* 0 on success, error code < 0 on error
|
|
*/
|
|
static int gigaset_close_bchannel(struct bc_state *bcs)
|
|
{
|
|
struct cardstate *cs = bcs->cs;
|
|
int req, ret;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
if (unlikely(!cs->connected)) {
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!(cs->hw.bas->basstate & (bcs->channel ? BS_B2OPEN : BS_B1OPEN))) {
|
|
/* channel not running: just signal common.c */
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
gigaset_bchannel_down(bcs);
|
|
return 0;
|
|
}
|
|
|
|
/* channel running: tell device to close it */
|
|
req = bcs->channel ? HD_CLOSE_B2CHANNEL : HD_CLOSE_B1CHANNEL;
|
|
ret = req_submit(bcs, req, 0, BAS_TIMEOUT);
|
|
if (ret < 0)
|
|
dev_err(cs->dev, "closing channel B%d failed\n",
|
|
bcs->channel + 1);
|
|
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
/* Device Operations */
|
|
/* ================= */
|
|
|
|
/* complete_cb
|
|
* unqueue first command buffer from queue, waking any sleepers
|
|
* must be called with cs->cmdlock held
|
|
* parameter:
|
|
* cs controller state structure
|
|
*/
|
|
static void complete_cb(struct cardstate *cs)
|
|
{
|
|
struct cmdbuf_t *cb = cs->cmdbuf;
|
|
|
|
/* unqueue completed buffer */
|
|
cs->cmdbytes -= cs->curlen;
|
|
gig_dbg(DEBUG_OUTPUT, "write_command: sent %u bytes, %u left",
|
|
cs->curlen, cs->cmdbytes);
|
|
if (cb->next != NULL) {
|
|
cs->cmdbuf = cb->next;
|
|
cs->cmdbuf->prev = NULL;
|
|
cs->curlen = cs->cmdbuf->len;
|
|
} else {
|
|
cs->cmdbuf = NULL;
|
|
cs->lastcmdbuf = NULL;
|
|
cs->curlen = 0;
|
|
}
|
|
|
|
if (cb->wake_tasklet)
|
|
tasklet_schedule(cb->wake_tasklet);
|
|
|
|
kfree(cb);
|
|
}
|
|
|
|
/* write_command_callback
|
|
* USB completion handler for AT command transmission
|
|
* called by the USB subsystem in interrupt context
|
|
* parameter:
|
|
* urb USB request block of completed request
|
|
* urb->context = controller state structure
|
|
*/
|
|
static void write_command_callback(struct urb *urb)
|
|
{
|
|
struct cardstate *cs = urb->context;
|
|
struct bas_cardstate *ucs = cs->hw.bas;
|
|
int status = urb->status;
|
|
unsigned long flags;
|
|
|
|
update_basstate(ucs, 0, BS_ATWRPEND);
|
|
wake_up(&ucs->waitqueue);
|
|
|
|
/* check status */
|
|
switch (status) {
|
|
case 0: /* normal completion */
|
|
break;
|
|
case -ENOENT: /* cancelled */
|
|
case -ECONNRESET: /* cancelled (async) */
|
|
case -EINPROGRESS: /* pending */
|
|
case -ENODEV: /* device removed */
|
|
case -ESHUTDOWN: /* device shut down */
|
|
/* ignore silently */
|
|
gig_dbg(DEBUG_USBREQ, "%s: %s",
|
|
__func__, get_usb_statmsg(status));
|
|
return;
|
|
default: /* any failure */
|
|
if (++ucs->retry_cmd_out > BAS_RETRY) {
|
|
dev_warn(cs->dev,
|
|
"command write: %s, "
|
|
"giving up after %d retries\n",
|
|
get_usb_statmsg(status),
|
|
ucs->retry_cmd_out);
|
|
break;
|
|
}
|
|
if (ucs->basstate & BS_SUSPEND) {
|
|
dev_warn(cs->dev,
|
|
"command write: %s, "
|
|
"won't retry - suspend requested\n",
|
|
get_usb_statmsg(status));
|
|
break;
|
|
}
|
|
if (cs->cmdbuf == NULL) {
|
|
dev_warn(cs->dev,
|
|
"command write: %s, "
|
|
"cannot retry - cmdbuf gone\n",
|
|
get_usb_statmsg(status));
|
|
break;
|
|
}
|
|
dev_notice(cs->dev, "command write: %s, retry %d\n",
|
|
get_usb_statmsg(status), ucs->retry_cmd_out);
|
|
if (atwrite_submit(cs, cs->cmdbuf->buf, cs->cmdbuf->len) >= 0)
|
|
/* resubmitted - bypass regular exit block */
|
|
return;
|
|
/* command send failed, assume base still waiting */
|
|
update_basstate(ucs, BS_ATREADY, 0);
|
|
}
|
|
|
|
spin_lock_irqsave(&cs->cmdlock, flags);
|
|
if (cs->cmdbuf != NULL)
|
|
complete_cb(cs);
|
|
spin_unlock_irqrestore(&cs->cmdlock, flags);
|
|
}
|
|
|
|
/* atrdy_timeout
|
|
* timeout routine for AT command transmission
|
|
* argument:
|
|
* controller state structure
|
|
*/
|
|
static void atrdy_timeout(unsigned long data)
|
|
{
|
|
struct cardstate *cs = (struct cardstate *) data;
|
|
struct bas_cardstate *ucs = cs->hw.bas;
|
|
|
|
dev_warn(cs->dev, "timeout waiting for HD_READY_SEND_ATDATA\n");
|
|
|
|
/* fake the missing signal - what else can I do? */
|
|
update_basstate(ucs, BS_ATREADY, BS_ATTIMER);
|
|
start_cbsend(cs);
|
|
}
|
|
|
|
/* atwrite_submit
|
|
* submit an HD_WRITE_ATMESSAGE command URB
|
|
* parameters:
|
|
* cs controller state structure
|
|
* buf buffer containing command to send
|
|
* len length of command to send
|
|
* return value:
|
|
* 0 on success
|
|
* -EBUSY if another request is pending
|
|
* any URB submission error code
|
|
*/
|
|
static int atwrite_submit(struct cardstate *cs, unsigned char *buf, int len)
|
|
{
|
|
struct bas_cardstate *ucs = cs->hw.bas;
|
|
int rc;
|
|
|
|
gig_dbg(DEBUG_USBREQ, "-------> HD_WRITE_ATMESSAGE (%d)", len);
|
|
|
|
if (update_basstate(ucs, BS_ATWRPEND, 0) & BS_ATWRPEND) {
|
|
dev_err(cs->dev,
|
|
"could not submit HD_WRITE_ATMESSAGE: URB busy\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
ucs->dr_cmd_out.bRequestType = OUT_VENDOR_REQ;
|
|
ucs->dr_cmd_out.bRequest = HD_WRITE_ATMESSAGE;
|
|
ucs->dr_cmd_out.wValue = 0;
|
|
ucs->dr_cmd_out.wIndex = 0;
|
|
ucs->dr_cmd_out.wLength = cpu_to_le16(len);
|
|
usb_fill_control_urb(ucs->urb_cmd_out, ucs->udev,
|
|
usb_sndctrlpipe(ucs->udev, 0),
|
|
(unsigned char *) &ucs->dr_cmd_out, buf, len,
|
|
write_command_callback, cs);
|
|
rc = usb_submit_urb(ucs->urb_cmd_out, GFP_ATOMIC);
|
|
if (unlikely(rc)) {
|
|
update_basstate(ucs, 0, BS_ATWRPEND);
|
|
dev_err(cs->dev, "could not submit HD_WRITE_ATMESSAGE: %s\n",
|
|
get_usb_rcmsg(rc));
|
|
return rc;
|
|
}
|
|
|
|
/* submitted successfully, start timeout if necessary */
|
|
if (!(update_basstate(ucs, BS_ATTIMER, BS_ATREADY) & BS_ATTIMER)) {
|
|
gig_dbg(DEBUG_OUTPUT, "setting ATREADY timeout of %d/10 secs",
|
|
ATRDY_TIMEOUT);
|
|
ucs->timer_atrdy.expires = jiffies + ATRDY_TIMEOUT * HZ / 10;
|
|
ucs->timer_atrdy.data = (unsigned long) cs;
|
|
ucs->timer_atrdy.function = atrdy_timeout;
|
|
add_timer(&ucs->timer_atrdy);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* start_cbsend
|
|
* start transmission of AT command queue if necessary
|
|
* parameter:
|
|
* cs controller state structure
|
|
* return value:
|
|
* 0 on success
|
|
* error code < 0 on error
|
|
*/
|
|
static int start_cbsend(struct cardstate *cs)
|
|
{
|
|
struct cmdbuf_t *cb;
|
|
struct bas_cardstate *ucs = cs->hw.bas;
|
|
unsigned long flags;
|
|
int rc;
|
|
int retval = 0;
|
|
|
|
/* check if suspend requested */
|
|
if (ucs->basstate & BS_SUSPEND) {
|
|
gig_dbg(DEBUG_OUTPUT, "suspending");
|
|
return -EHOSTUNREACH;
|
|
}
|
|
|
|
/* check if AT channel is open */
|
|
if (!(ucs->basstate & BS_ATOPEN)) {
|
|
gig_dbg(DEBUG_OUTPUT, "AT channel not open");
|
|
rc = req_submit(cs->bcs, HD_OPEN_ATCHANNEL, 0, BAS_TIMEOUT);
|
|
if (rc < 0) {
|
|
/* flush command queue */
|
|
spin_lock_irqsave(&cs->cmdlock, flags);
|
|
while (cs->cmdbuf != NULL)
|
|
complete_cb(cs);
|
|
spin_unlock_irqrestore(&cs->cmdlock, flags);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
/* try to send first command in queue */
|
|
spin_lock_irqsave(&cs->cmdlock, flags);
|
|
|
|
while ((cb = cs->cmdbuf) != NULL && (ucs->basstate & BS_ATREADY)) {
|
|
ucs->retry_cmd_out = 0;
|
|
rc = atwrite_submit(cs, cb->buf, cb->len);
|
|
if (unlikely(rc)) {
|
|
retval = rc;
|
|
complete_cb(cs);
|
|
}
|
|
}
|
|
|
|
spin_unlock_irqrestore(&cs->cmdlock, flags);
|
|
return retval;
|
|
}
|
|
|
|
/* gigaset_write_cmd
|
|
* This function is called by the device independent part of the driver
|
|
* to transmit an AT command string to the Gigaset device.
|
|
* It encapsulates the device specific method for transmission over the
|
|
* direct USB connection to the base.
|
|
* The command string is added to the queue of commands to send, and
|
|
* USB transmission is started if necessary.
|
|
* parameters:
|
|
* cs controller state structure
|
|
* buf command string to send
|
|
* len number of bytes to send (max. IF_WRITEBUF)
|
|
* wake_tasklet tasklet to run when transmission is completed
|
|
* (NULL if none)
|
|
* return value:
|
|
* number of bytes queued on success
|
|
* error code < 0 on error
|
|
*/
|
|
static int gigaset_write_cmd(struct cardstate *cs,
|
|
const unsigned char *buf, int len,
|
|
struct tasklet_struct *wake_tasklet)
|
|
{
|
|
struct cmdbuf_t *cb;
|
|
unsigned long flags;
|
|
int rc;
|
|
|
|
gigaset_dbg_buffer(cs->mstate != MS_LOCKED ?
|
|
DEBUG_TRANSCMD : DEBUG_LOCKCMD,
|
|
"CMD Transmit", len, buf);
|
|
|
|
if (len <= 0) {
|
|
/* nothing to do */
|
|
rc = 0;
|
|
goto notqueued;
|
|
}
|
|
|
|
/* translate "+++" escape sequence sent as a single separate command
|
|
* into "close AT channel" command for error recovery
|
|
* The next command will reopen the AT channel automatically.
|
|
*/
|
|
if (len == 3 && !memcmp(buf, "+++", 3)) {
|
|
rc = req_submit(cs->bcs, HD_CLOSE_ATCHANNEL, 0, BAS_TIMEOUT);
|
|
goto notqueued;
|
|
}
|
|
|
|
if (len > IF_WRITEBUF)
|
|
len = IF_WRITEBUF;
|
|
cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC);
|
|
if (!cb) {
|
|
dev_err(cs->dev, "%s: out of memory\n", __func__);
|
|
rc = -ENOMEM;
|
|
goto notqueued;
|
|
}
|
|
|
|
memcpy(cb->buf, buf, len);
|
|
cb->len = len;
|
|
cb->offset = 0;
|
|
cb->next = NULL;
|
|
cb->wake_tasklet = wake_tasklet;
|
|
|
|
spin_lock_irqsave(&cs->cmdlock, flags);
|
|
cb->prev = cs->lastcmdbuf;
|
|
if (cs->lastcmdbuf)
|
|
cs->lastcmdbuf->next = cb;
|
|
else {
|
|
cs->cmdbuf = cb;
|
|
cs->curlen = len;
|
|
}
|
|
cs->cmdbytes += len;
|
|
cs->lastcmdbuf = cb;
|
|
spin_unlock_irqrestore(&cs->cmdlock, flags);
|
|
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
if (unlikely(!cs->connected)) {
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__);
|
|
/* flush command queue */
|
|
spin_lock_irqsave(&cs->cmdlock, flags);
|
|
while (cs->cmdbuf != NULL)
|
|
complete_cb(cs);
|
|
spin_unlock_irqrestore(&cs->cmdlock, flags);
|
|
return -ENODEV;
|
|
}
|
|
rc = start_cbsend(cs);
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
return rc < 0 ? rc : len;
|
|
|
|
notqueued: /* request handled without queuing */
|
|
if (wake_tasklet)
|
|
tasklet_schedule(wake_tasklet);
|
|
return rc;
|
|
}
|
|
|
|
/* gigaset_write_room
|
|
* tty_driver.write_room interface routine
|
|
* return number of characters the driver will accept to be written via
|
|
* gigaset_write_cmd
|
|
* parameter:
|
|
* controller state structure
|
|
* return value:
|
|
* number of characters
|
|
*/
|
|
static int gigaset_write_room(struct cardstate *cs)
|
|
{
|
|
return IF_WRITEBUF;
|
|
}
|
|
|
|
/* gigaset_chars_in_buffer
|
|
* tty_driver.chars_in_buffer interface routine
|
|
* return number of characters waiting to be sent
|
|
* parameter:
|
|
* controller state structure
|
|
* return value:
|
|
* number of characters
|
|
*/
|
|
static int gigaset_chars_in_buffer(struct cardstate *cs)
|
|
{
|
|
return cs->cmdbytes;
|
|
}
|
|
|
|
/* gigaset_brkchars
|
|
* implementation of ioctl(GIGASET_BRKCHARS)
|
|
* parameter:
|
|
* controller state structure
|
|
* return value:
|
|
* -EINVAL (unimplemented function)
|
|
*/
|
|
static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
|
|
/* Device Initialization/Shutdown */
|
|
/* ============================== */
|
|
|
|
/* Free hardware dependent part of the B channel structure
|
|
* parameter:
|
|
* bcs B channel structure
|
|
* return value:
|
|
* !=0 on success
|
|
*/
|
|
static int gigaset_freebcshw(struct bc_state *bcs)
|
|
{
|
|
struct bas_bc_state *ubc = bcs->hw.bas;
|
|
int i;
|
|
|
|
if (!ubc)
|
|
return 0;
|
|
|
|
/* kill URBs and tasklets before freeing - better safe than sorry */
|
|
ubc->running = 0;
|
|
gig_dbg(DEBUG_INIT, "%s: killing iso URBs", __func__);
|
|
for (i = 0; i < BAS_OUTURBS; ++i) {
|
|
usb_kill_urb(ubc->isoouturbs[i].urb);
|
|
usb_free_urb(ubc->isoouturbs[i].urb);
|
|
}
|
|
for (i = 0; i < BAS_INURBS; ++i) {
|
|
usb_kill_urb(ubc->isoinurbs[i]);
|
|
usb_free_urb(ubc->isoinurbs[i]);
|
|
}
|
|
tasklet_kill(&ubc->sent_tasklet);
|
|
tasklet_kill(&ubc->rcvd_tasklet);
|
|
kfree(ubc->isooutbuf);
|
|
kfree(ubc);
|
|
bcs->hw.bas = NULL;
|
|
return 1;
|
|
}
|
|
|
|
/* Initialize hardware dependent part of the B channel structure
|
|
* parameter:
|
|
* bcs B channel structure
|
|
* return value:
|
|
* !=0 on success
|
|
*/
|
|
static int gigaset_initbcshw(struct bc_state *bcs)
|
|
{
|
|
int i;
|
|
struct bas_bc_state *ubc;
|
|
|
|
bcs->hw.bas = ubc = kmalloc(sizeof(struct bas_bc_state), GFP_KERNEL);
|
|
if (!ubc) {
|
|
pr_err("out of memory\n");
|
|
return 0;
|
|
}
|
|
|
|
ubc->running = 0;
|
|
atomic_set(&ubc->corrbytes, 0);
|
|
spin_lock_init(&ubc->isooutlock);
|
|
for (i = 0; i < BAS_OUTURBS; ++i) {
|
|
ubc->isoouturbs[i].urb = NULL;
|
|
ubc->isoouturbs[i].bcs = bcs;
|
|
}
|
|
ubc->isooutdone = ubc->isooutfree = ubc->isooutovfl = NULL;
|
|
ubc->numsub = 0;
|
|
ubc->isooutbuf = kmalloc(sizeof(struct isowbuf_t), GFP_KERNEL);
|
|
if (!ubc->isooutbuf) {
|
|
pr_err("out of memory\n");
|
|
kfree(ubc);
|
|
bcs->hw.bas = NULL;
|
|
return 0;
|
|
}
|
|
tasklet_init(&ubc->sent_tasklet,
|
|
write_iso_tasklet, (unsigned long) bcs);
|
|
|
|
spin_lock_init(&ubc->isoinlock);
|
|
for (i = 0; i < BAS_INURBS; ++i)
|
|
ubc->isoinurbs[i] = NULL;
|
|
ubc->isoindone = NULL;
|
|
ubc->loststatus = -EINPROGRESS;
|
|
ubc->isoinlost = 0;
|
|
ubc->seqlen = 0;
|
|
ubc->inbyte = 0;
|
|
ubc->inbits = 0;
|
|
ubc->goodbytes = 0;
|
|
ubc->alignerrs = 0;
|
|
ubc->fcserrs = 0;
|
|
ubc->frameerrs = 0;
|
|
ubc->giants = 0;
|
|
ubc->runts = 0;
|
|
ubc->aborts = 0;
|
|
ubc->shared0s = 0;
|
|
ubc->stolen0s = 0;
|
|
tasklet_init(&ubc->rcvd_tasklet,
|
|
read_iso_tasklet, (unsigned long) bcs);
|
|
return 1;
|
|
}
|
|
|
|
static void gigaset_reinitbcshw(struct bc_state *bcs)
|
|
{
|
|
struct bas_bc_state *ubc = bcs->hw.bas;
|
|
|
|
bcs->hw.bas->running = 0;
|
|
atomic_set(&bcs->hw.bas->corrbytes, 0);
|
|
bcs->hw.bas->numsub = 0;
|
|
spin_lock_init(&ubc->isooutlock);
|
|
spin_lock_init(&ubc->isoinlock);
|
|
ubc->loststatus = -EINPROGRESS;
|
|
}
|
|
|
|
static void gigaset_freecshw(struct cardstate *cs)
|
|
{
|
|
/* timers, URBs and rcvbuf are disposed of in disconnect */
|
|
kfree(cs->hw.bas->int_in_buf);
|
|
kfree(cs->hw.bas);
|
|
cs->hw.bas = NULL;
|
|
}
|
|
|
|
static int gigaset_initcshw(struct cardstate *cs)
|
|
{
|
|
struct bas_cardstate *ucs;
|
|
|
|
cs->hw.bas = ucs = kmalloc(sizeof *ucs, GFP_KERNEL);
|
|
if (!ucs) {
|
|
pr_err("out of memory\n");
|
|
return 0;
|
|
}
|
|
ucs->int_in_buf = kmalloc(IP_MSGSIZE, GFP_KERNEL);
|
|
if (!ucs->int_in_buf) {
|
|
kfree(ucs);
|
|
pr_err("out of memory\n");
|
|
return 0;
|
|
}
|
|
|
|
ucs->urb_cmd_in = NULL;
|
|
ucs->urb_cmd_out = NULL;
|
|
ucs->rcvbuf = NULL;
|
|
ucs->rcvbuf_size = 0;
|
|
|
|
spin_lock_init(&ucs->lock);
|
|
ucs->pending = 0;
|
|
|
|
ucs->basstate = 0;
|
|
init_timer(&ucs->timer_ctrl);
|
|
init_timer(&ucs->timer_atrdy);
|
|
init_timer(&ucs->timer_cmd_in);
|
|
init_waitqueue_head(&ucs->waitqueue);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* freeurbs
|
|
* unlink and deallocate all URBs unconditionally
|
|
* caller must make sure that no commands are still in progress
|
|
* parameter:
|
|
* cs controller state structure
|
|
*/
|
|
static void freeurbs(struct cardstate *cs)
|
|
{
|
|
struct bas_cardstate *ucs = cs->hw.bas;
|
|
struct bas_bc_state *ubc;
|
|
int i, j;
|
|
|
|
gig_dbg(DEBUG_INIT, "%s: killing URBs", __func__);
|
|
for (j = 0; j < BAS_CHANNELS; ++j) {
|
|
ubc = cs->bcs[j].hw.bas;
|
|
for (i = 0; i < BAS_OUTURBS; ++i) {
|
|
usb_kill_urb(ubc->isoouturbs[i].urb);
|
|
usb_free_urb(ubc->isoouturbs[i].urb);
|
|
ubc->isoouturbs[i].urb = NULL;
|
|
}
|
|
for (i = 0; i < BAS_INURBS; ++i) {
|
|
usb_kill_urb(ubc->isoinurbs[i]);
|
|
usb_free_urb(ubc->isoinurbs[i]);
|
|
ubc->isoinurbs[i] = NULL;
|
|
}
|
|
}
|
|
usb_kill_urb(ucs->urb_int_in);
|
|
usb_free_urb(ucs->urb_int_in);
|
|
ucs->urb_int_in = NULL;
|
|
usb_kill_urb(ucs->urb_cmd_out);
|
|
usb_free_urb(ucs->urb_cmd_out);
|
|
ucs->urb_cmd_out = NULL;
|
|
usb_kill_urb(ucs->urb_cmd_in);
|
|
usb_free_urb(ucs->urb_cmd_in);
|
|
ucs->urb_cmd_in = NULL;
|
|
usb_kill_urb(ucs->urb_ctrl);
|
|
usb_free_urb(ucs->urb_ctrl);
|
|
ucs->urb_ctrl = NULL;
|
|
}
|
|
|
|
/* gigaset_probe
|
|
* This function is called when a new USB device is connected.
|
|
* It checks whether the new device is handled by this driver.
|
|
*/
|
|
static int gigaset_probe(struct usb_interface *interface,
|
|
const struct usb_device_id *id)
|
|
{
|
|
struct usb_host_interface *hostif;
|
|
struct usb_device *udev = interface_to_usbdev(interface);
|
|
struct cardstate *cs = NULL;
|
|
struct bas_cardstate *ucs = NULL;
|
|
struct bas_bc_state *ubc;
|
|
struct usb_endpoint_descriptor *endpoint;
|
|
int i, j;
|
|
int rc;
|
|
|
|
gig_dbg(DEBUG_INIT,
|
|
"%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)",
|
|
__func__, le16_to_cpu(udev->descriptor.idVendor),
|
|
le16_to_cpu(udev->descriptor.idProduct));
|
|
|
|
/* set required alternate setting */
|
|
hostif = interface->cur_altsetting;
|
|
if (hostif->desc.bAlternateSetting != 3) {
|
|
gig_dbg(DEBUG_INIT,
|
|
"%s: wrong alternate setting %d - trying to switch",
|
|
__func__, hostif->desc.bAlternateSetting);
|
|
if (usb_set_interface(udev, hostif->desc.bInterfaceNumber, 3)
|
|
< 0) {
|
|
dev_warn(&udev->dev, "usb_set_interface failed, "
|
|
"device %d interface %d altsetting %d\n",
|
|
udev->devnum, hostif->desc.bInterfaceNumber,
|
|
hostif->desc.bAlternateSetting);
|
|
return -ENODEV;
|
|
}
|
|
hostif = interface->cur_altsetting;
|
|
}
|
|
|
|
/* Reject application specific interfaces
|
|
*/
|
|
if (hostif->desc.bInterfaceClass != 255) {
|
|
dev_warn(&udev->dev, "%s: bInterfaceClass == %d\n",
|
|
__func__, hostif->desc.bInterfaceClass);
|
|
return -ENODEV;
|
|
}
|
|
|
|
dev_info(&udev->dev,
|
|
"%s: Device matched (Vendor: 0x%x, Product: 0x%x)\n",
|
|
__func__, le16_to_cpu(udev->descriptor.idVendor),
|
|
le16_to_cpu(udev->descriptor.idProduct));
|
|
|
|
/* allocate memory for our device state and intialize it */
|
|
cs = gigaset_initcs(driver, BAS_CHANNELS, 0, 0, cidmode,
|
|
GIGASET_MODULENAME);
|
|
if (!cs)
|
|
return -ENODEV;
|
|
ucs = cs->hw.bas;
|
|
|
|
/* save off device structure ptrs for later use */
|
|
usb_get_dev(udev);
|
|
ucs->udev = udev;
|
|
ucs->interface = interface;
|
|
cs->dev = &interface->dev;
|
|
|
|
/* allocate URBs:
|
|
* - one for the interrupt pipe
|
|
* - three for the different uses of the default control pipe
|
|
* - three for each isochronous pipe
|
|
*/
|
|
if (!(ucs->urb_int_in = usb_alloc_urb(0, GFP_KERNEL)) ||
|
|
!(ucs->urb_cmd_in = usb_alloc_urb(0, GFP_KERNEL)) ||
|
|
!(ucs->urb_cmd_out = usb_alloc_urb(0, GFP_KERNEL)) ||
|
|
!(ucs->urb_ctrl = usb_alloc_urb(0, GFP_KERNEL)))
|
|
goto allocerr;
|
|
|
|
for (j = 0; j < BAS_CHANNELS; ++j) {
|
|
ubc = cs->bcs[j].hw.bas;
|
|
for (i = 0; i < BAS_OUTURBS; ++i)
|
|
if (!(ubc->isoouturbs[i].urb =
|
|
usb_alloc_urb(BAS_NUMFRAMES, GFP_KERNEL)))
|
|
goto allocerr;
|
|
for (i = 0; i < BAS_INURBS; ++i)
|
|
if (!(ubc->isoinurbs[i] =
|
|
usb_alloc_urb(BAS_NUMFRAMES, GFP_KERNEL)))
|
|
goto allocerr;
|
|
}
|
|
|
|
ucs->rcvbuf = NULL;
|
|
ucs->rcvbuf_size = 0;
|
|
|
|
/* Fill the interrupt urb and send it to the core */
|
|
endpoint = &hostif->endpoint[0].desc;
|
|
usb_fill_int_urb(ucs->urb_int_in, udev,
|
|
usb_rcvintpipe(udev,
|
|
(endpoint->bEndpointAddress) & 0x0f),
|
|
ucs->int_in_buf, IP_MSGSIZE, read_int_callback, cs,
|
|
endpoint->bInterval);
|
|
rc = usb_submit_urb(ucs->urb_int_in, GFP_KERNEL);
|
|
if (rc != 0) {
|
|
dev_err(cs->dev, "could not submit interrupt URB: %s\n",
|
|
get_usb_rcmsg(rc));
|
|
goto error;
|
|
}
|
|
|
|
/* tell the device that the driver is ready */
|
|
rc = req_submit(cs->bcs, HD_DEVICE_INIT_ACK, 0, 0);
|
|
if (rc != 0)
|
|
goto error;
|
|
|
|
/* tell common part that the device is ready */
|
|
if (startmode == SM_LOCKED)
|
|
cs->mstate = MS_LOCKED;
|
|
|
|
/* save address of controller structure */
|
|
usb_set_intfdata(interface, cs);
|
|
|
|
if (!gigaset_start(cs))
|
|
goto error;
|
|
|
|
return 0;
|
|
|
|
allocerr:
|
|
dev_err(cs->dev, "could not allocate URBs\n");
|
|
error:
|
|
freeurbs(cs);
|
|
usb_set_intfdata(interface, NULL);
|
|
gigaset_freecs(cs);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* gigaset_disconnect
|
|
* This function is called when the Gigaset base is unplugged.
|
|
*/
|
|
static void gigaset_disconnect(struct usb_interface *interface)
|
|
{
|
|
struct cardstate *cs;
|
|
struct bas_cardstate *ucs;
|
|
int j;
|
|
|
|
cs = usb_get_intfdata(interface);
|
|
|
|
ucs = cs->hw.bas;
|
|
|
|
dev_info(cs->dev, "disconnecting Gigaset base\n");
|
|
|
|
/* mark base as not ready, all channels disconnected */
|
|
ucs->basstate = 0;
|
|
|
|
/* tell LL all channels are down */
|
|
for (j = 0; j < BAS_CHANNELS; ++j)
|
|
gigaset_bchannel_down(cs->bcs + j);
|
|
|
|
/* stop driver (common part) */
|
|
gigaset_stop(cs);
|
|
|
|
/* stop timers and URBs, free ressources */
|
|
del_timer_sync(&ucs->timer_ctrl);
|
|
del_timer_sync(&ucs->timer_atrdy);
|
|
del_timer_sync(&ucs->timer_cmd_in);
|
|
freeurbs(cs);
|
|
usb_set_intfdata(interface, NULL);
|
|
kfree(ucs->rcvbuf);
|
|
ucs->rcvbuf = NULL;
|
|
ucs->rcvbuf_size = 0;
|
|
usb_put_dev(ucs->udev);
|
|
ucs->interface = NULL;
|
|
ucs->udev = NULL;
|
|
cs->dev = NULL;
|
|
gigaset_freecs(cs);
|
|
}
|
|
|
|
/* gigaset_suspend
|
|
* This function is called before the USB connection is suspended.
|
|
*/
|
|
static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
|
|
{
|
|
struct cardstate *cs = usb_get_intfdata(intf);
|
|
struct bas_cardstate *ucs = cs->hw.bas;
|
|
int rc;
|
|
|
|
/* set suspend flag; this stops AT command/response traffic */
|
|
if (update_basstate(ucs, BS_SUSPEND, 0) & BS_SUSPEND) {
|
|
gig_dbg(DEBUG_SUSPEND, "already suspended");
|
|
return 0;
|
|
}
|
|
|
|
/* wait a bit for blocking conditions to go away */
|
|
rc = wait_event_timeout(ucs->waitqueue,
|
|
!(ucs->basstate &
|
|
(BS_B1OPEN|BS_B2OPEN|BS_ATRDPEND|BS_ATWRPEND)),
|
|
BAS_TIMEOUT*HZ/10);
|
|
gig_dbg(DEBUG_SUSPEND, "wait_event_timeout() -> %d", rc);
|
|
|
|
/* check for conditions preventing suspend */
|
|
if (ucs->basstate & (BS_B1OPEN|BS_B2OPEN|BS_ATRDPEND|BS_ATWRPEND)) {
|
|
dev_warn(cs->dev, "cannot suspend:\n");
|
|
if (ucs->basstate & BS_B1OPEN)
|
|
dev_warn(cs->dev, " B channel 1 open\n");
|
|
if (ucs->basstate & BS_B2OPEN)
|
|
dev_warn(cs->dev, " B channel 2 open\n");
|
|
if (ucs->basstate & BS_ATRDPEND)
|
|
dev_warn(cs->dev, " receiving AT reply\n");
|
|
if (ucs->basstate & BS_ATWRPEND)
|
|
dev_warn(cs->dev, " sending AT command\n");
|
|
update_basstate(ucs, 0, BS_SUSPEND);
|
|
return -EBUSY;
|
|
}
|
|
|
|
/* close AT channel if open */
|
|
if (ucs->basstate & BS_ATOPEN) {
|
|
gig_dbg(DEBUG_SUSPEND, "closing AT channel");
|
|
rc = req_submit(cs->bcs, HD_CLOSE_ATCHANNEL, 0, 0);
|
|
if (rc) {
|
|
update_basstate(ucs, 0, BS_SUSPEND);
|
|
return rc;
|
|
}
|
|
wait_event_timeout(ucs->waitqueue, !ucs->pending,
|
|
BAS_TIMEOUT*HZ/10);
|
|
/* in case of timeout, proceed anyway */
|
|
}
|
|
|
|
/* kill all URBs and timers that might still be pending */
|
|
usb_kill_urb(ucs->urb_ctrl);
|
|
usb_kill_urb(ucs->urb_int_in);
|
|
del_timer_sync(&ucs->timer_ctrl);
|
|
|
|
gig_dbg(DEBUG_SUSPEND, "suspend complete");
|
|
return 0;
|
|
}
|
|
|
|
/* gigaset_resume
|
|
* This function is called after the USB connection has been resumed.
|
|
*/
|
|
static int gigaset_resume(struct usb_interface *intf)
|
|
{
|
|
struct cardstate *cs = usb_get_intfdata(intf);
|
|
struct bas_cardstate *ucs = cs->hw.bas;
|
|
int rc;
|
|
|
|
/* resubmit interrupt URB for spontaneous messages from base */
|
|
rc = usb_submit_urb(ucs->urb_int_in, GFP_KERNEL);
|
|
if (rc) {
|
|
dev_err(cs->dev, "could not resubmit interrupt URB: %s\n",
|
|
get_usb_rcmsg(rc));
|
|
return rc;
|
|
}
|
|
|
|
/* clear suspend flag to reallow activity */
|
|
update_basstate(ucs, 0, BS_SUSPEND);
|
|
|
|
gig_dbg(DEBUG_SUSPEND, "resume complete");
|
|
return 0;
|
|
}
|
|
|
|
/* gigaset_pre_reset
|
|
* This function is called before the USB connection is reset.
|
|
*/
|
|
static int gigaset_pre_reset(struct usb_interface *intf)
|
|
{
|
|
/* handle just like suspend */
|
|
return gigaset_suspend(intf, PMSG_ON);
|
|
}
|
|
|
|
/* gigaset_post_reset
|
|
* This function is called after the USB connection has been reset.
|
|
*/
|
|
static int gigaset_post_reset(struct usb_interface *intf)
|
|
{
|
|
/* FIXME: send HD_DEVICE_INIT_ACK? */
|
|
|
|
/* resume operations */
|
|
return gigaset_resume(intf);
|
|
}
|
|
|
|
|
|
static const struct gigaset_ops gigops = {
|
|
gigaset_write_cmd,
|
|
gigaset_write_room,
|
|
gigaset_chars_in_buffer,
|
|
gigaset_brkchars,
|
|
gigaset_init_bchannel,
|
|
gigaset_close_bchannel,
|
|
gigaset_initbcshw,
|
|
gigaset_freebcshw,
|
|
gigaset_reinitbcshw,
|
|
gigaset_initcshw,
|
|
gigaset_freecshw,
|
|
gigaset_set_modem_ctrl,
|
|
gigaset_baud_rate,
|
|
gigaset_set_line_ctrl,
|
|
gigaset_isoc_send_skb,
|
|
gigaset_isoc_input,
|
|
};
|
|
|
|
/* bas_gigaset_init
|
|
* This function is called after the kernel module is loaded.
|
|
*/
|
|
static int __init bas_gigaset_init(void)
|
|
{
|
|
int result;
|
|
|
|
/* allocate memory for our driver state and intialize it */
|
|
driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
|
|
GIGASET_MODULENAME, GIGASET_DEVNAME,
|
|
&gigops, THIS_MODULE);
|
|
if (driver == NULL)
|
|
goto error;
|
|
|
|
/* register this driver with the USB subsystem */
|
|
result = usb_register(&gigaset_usb_driver);
|
|
if (result < 0) {
|
|
pr_err("error %d registering USB driver\n", -result);
|
|
goto error;
|
|
}
|
|
|
|
pr_info(DRIVER_DESC "\n");
|
|
return 0;
|
|
|
|
error:
|
|
if (driver)
|
|
gigaset_freedriver(driver);
|
|
driver = NULL;
|
|
return -1;
|
|
}
|
|
|
|
/* bas_gigaset_exit
|
|
* This function is called before the kernel module is unloaded.
|
|
*/
|
|
static void __exit bas_gigaset_exit(void)
|
|
{
|
|
struct bas_cardstate *ucs;
|
|
int i;
|
|
|
|
gigaset_blockdriver(driver); /* => probe will fail
|
|
* => no gigaset_start any more
|
|
*/
|
|
|
|
/* stop all connected devices */
|
|
for (i = 0; i < driver->minors; i++) {
|
|
if (gigaset_shutdown(driver->cs + i) < 0)
|
|
continue; /* no device */
|
|
/* from now on, no isdn callback should be possible */
|
|
|
|
/* close all still open channels */
|
|
ucs = driver->cs[i].hw.bas;
|
|
if (ucs->basstate & BS_B1OPEN) {
|
|
gig_dbg(DEBUG_INIT, "closing B1 channel");
|
|
usb_control_msg(ucs->udev,
|
|
usb_sndctrlpipe(ucs->udev, 0),
|
|
HD_CLOSE_B1CHANNEL, OUT_VENDOR_REQ,
|
|
0, 0, NULL, 0, BAS_TIMEOUT);
|
|
}
|
|
if (ucs->basstate & BS_B2OPEN) {
|
|
gig_dbg(DEBUG_INIT, "closing B2 channel");
|
|
usb_control_msg(ucs->udev,
|
|
usb_sndctrlpipe(ucs->udev, 0),
|
|
HD_CLOSE_B2CHANNEL, OUT_VENDOR_REQ,
|
|
0, 0, NULL, 0, BAS_TIMEOUT);
|
|
}
|
|
if (ucs->basstate & BS_ATOPEN) {
|
|
gig_dbg(DEBUG_INIT, "closing AT channel");
|
|
usb_control_msg(ucs->udev,
|
|
usb_sndctrlpipe(ucs->udev, 0),
|
|
HD_CLOSE_ATCHANNEL, OUT_VENDOR_REQ,
|
|
0, 0, NULL, 0, BAS_TIMEOUT);
|
|
}
|
|
ucs->basstate = 0;
|
|
}
|
|
|
|
/* deregister this driver with the USB subsystem */
|
|
usb_deregister(&gigaset_usb_driver);
|
|
/* this will call the disconnect-callback */
|
|
/* from now on, no disconnect/probe callback should be running */
|
|
|
|
gigaset_freedriver(driver);
|
|
driver = NULL;
|
|
}
|
|
|
|
|
|
module_init(bas_gigaset_init);
|
|
module_exit(bas_gigaset_exit);
|
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|