summaryrefslogtreecommitdiff
path: root/drivers/isdn/gigaset/bas-gigaset.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/isdn/gigaset/bas-gigaset.c')
-rw-r--r--drivers/isdn/gigaset/bas-gigaset.c2675
1 files changed, 0 insertions, 2675 deletions
diff --git a/drivers/isdn/gigaset/bas-gigaset.c b/drivers/isdn/gigaset/bas-gigaset.c
deleted file mode 100644
index 149b1aca52a2..000000000000
--- a/drivers/isdn/gigaset/bas-gigaset.c
+++ /dev/null
@@ -1,2675 +0,0 @@
-/*
- * USB driver for Gigaset 307x base via direct USB connection.
- *
- * Copyright (c) 2001 by Hansjoerg Lipp <hjlipp@web.de>,
- * Tilman Schmidt <tilman@imap.cc>,
- * Stefan Eilers.
- *
- * =====================================================================
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- * =====================================================================
- */
-
-#include "gigaset.h"
-#include <linux/usb.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-
-/* Version Information */
-#define DRIVER_AUTHOR "Tilman Schmidt <tilman@imap.cc>, Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers"
-#define DRIVER_DESC "USB Driver for Gigaset 307x"
-
-
-/* Module parameters */
-
-static int startmode = SM_ISDN;
-static int cidmode = 1;
-
-module_param(startmode, int, S_IRUGO);
-module_param(cidmode, int, S_IRUGO);
-MODULE_PARM_DESC(startmode, "start in isdn4linux mode");
-MODULE_PARM_DESC(cidmode, "Call-ID mode");
-
-#define GIGASET_MINORS 1
-#define GIGASET_MINOR 16
-#define GIGASET_MODULENAME "bas_gigaset"
-#define GIGASET_DEVNAME "ttyGB"
-
-/* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */
-#define IF_WRITEBUF 264
-
-/* interrupt pipe message size according to ibid. ch. 2.2 */
-#define IP_MSGSIZE 3
-
-/* Values for the Gigaset 307x */
-#define USB_GIGA_VENDOR_ID 0x0681
-#define USB_3070_PRODUCT_ID 0x0001
-#define USB_3075_PRODUCT_ID 0x0002
-#define USB_SX303_PRODUCT_ID 0x0021
-#define USB_SX353_PRODUCT_ID 0x0022
-
-/* table of devices that work with this driver */
-static const struct usb_device_id gigaset_table[] = {
- { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_3070_PRODUCT_ID) },
- { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_3075_PRODUCT_ID) },
- { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX303_PRODUCT_ID) },
- { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX353_PRODUCT_ID) },
- { } /* Terminating entry */
-};
-
-MODULE_DEVICE_TABLE(usb, gigaset_table);
-
-/*======================= local function prototypes ==========================*/
-
-/* function called if a new device belonging to this driver is connected */
-static int gigaset_probe(struct usb_interface *interface,
- const struct usb_device_id *id);
-
-/* Function will be called if the device is unplugged */
-static void gigaset_disconnect(struct usb_interface *interface);
-
-/* functions called before/after suspend */
-static int gigaset_suspend(struct usb_interface *intf, pm_message_t message);
-static int gigaset_resume(struct usb_interface *intf);
-
-/* functions called before/after device reset */
-static int gigaset_pre_reset(struct usb_interface *intf);
-static int gigaset_post_reset(struct usb_interface *intf);
-
-static int atread_submit(struct cardstate *, int);
-static void stopurbs(struct bas_bc_state *);
-static int req_submit(struct bc_state *, int, int, int);
-static int atwrite_submit(struct cardstate *, unsigned char *, int);
-static int start_cbsend(struct cardstate *);
-
-/*============================================================================*/
-
-struct bas_cardstate {
- struct usb_device *udev; /* USB device pointer */
- struct cardstate *cs;
- struct usb_interface *interface; /* interface for this device */
- unsigned char minor; /* starting minor number */
-
- struct urb *urb_ctrl; /* control pipe default URB */
- struct usb_ctrlrequest dr_ctrl;
- struct timer_list timer_ctrl; /* control request timeout */
- int retry_ctrl;
-
- struct timer_list timer_atrdy; /* AT command ready timeout */
- struct urb *urb_cmd_out; /* for sending AT commands */
- struct usb_ctrlrequest dr_cmd_out;
- int retry_cmd_out;
-
- struct urb *urb_cmd_in; /* for receiving AT replies */
- struct usb_ctrlrequest dr_cmd_in;
- struct timer_list timer_cmd_in; /* receive request timeout */
- unsigned char *rcvbuf; /* AT reply receive buffer */
-
- struct urb *urb_int_in; /* URB for interrupt pipe */
- unsigned char *int_in_buf;
- struct work_struct int_in_wq; /* for usb_clear_halt() */
- struct timer_list timer_int_in; /* int read retry delay */
- int retry_int_in;
-
- spinlock_t lock; /* locks all following */
- int basstate; /* bitmap (BS_*) */
- int pending; /* uncompleted base request */
- wait_queue_head_t waitqueue;
- int rcvbuf_size; /* size of AT receive buffer */
- /* 0: no receive in progress */
- int retry_cmd_in; /* receive req retry count */
-};
-
-/* status of direct USB connection to 307x base (bits in basstate) */
-#define BS_ATOPEN 0x001 /* AT channel open */
-#define BS_B1OPEN 0x002 /* B channel 1 open */
-#define BS_B2OPEN 0x004 /* B channel 2 open */
-#define BS_ATREADY 0x008 /* base ready for AT command */
-#define BS_INIT 0x010 /* base has signalled INIT_OK */
-#define BS_ATTIMER 0x020 /* waiting for HD_READY_SEND_ATDATA */
-#define BS_ATRDPEND 0x040 /* urb_cmd_in in use */
-#define BS_ATWRPEND 0x080 /* urb_cmd_out in use */
-#define BS_SUSPEND 0x100 /* USB port suspended */
-#define BS_RESETTING 0x200 /* waiting for HD_RESET_INTERRUPT_PIPE_ACK */
-
-
-static struct gigaset_driver *driver;
-
-/* usb specific object needed to register this driver with the usb subsystem */
-static struct usb_driver gigaset_usb_driver = {
- .name = GIGASET_MODULENAME,
- .probe = gigaset_probe,
- .disconnect = gigaset_disconnect,
- .id_table = gigaset_table,
- .suspend = gigaset_suspend,
- .resume = gigaset_resume,
- .reset_resume = gigaset_post_reset,
- .pre_reset = gigaset_pre_reset,
- .post_reset = gigaset_post_reset,
- .disable_hub_initiated_lpm = 1,
-};
-
-/* get message text for usb_submit_urb return code
- */
-static char *get_usb_rcmsg(int rc)
-{
- static char unkmsg[28];
-
- switch (rc) {
- case 0:
- return "success";
- case -ENOMEM:
- return "out of memory";
- case -ENODEV:
- return "device not present";
- case -ENOENT:
- return "endpoint not present";
- case -ENXIO:
- return "URB type not supported";
- case -EINVAL:
- return "invalid argument";
- case -EAGAIN:
- return "start frame too early or too much scheduled";
- case -EFBIG:
- return "too many isoc frames requested";
- case -EPIPE:
- return "endpoint stalled";
- case -EMSGSIZE:
- return "invalid packet size";
- case -ENOSPC:
- return "would overcommit USB bandwidth";
- case -ESHUTDOWN:
- return "device shut down";
- case -EPERM:
- return "reject flag set";
- case -EHOSTUNREACH:
- return "device suspended";
- default:
- snprintf(unkmsg, sizeof(unkmsg), "unknown error %d", rc);
- return unkmsg;
- }
-}
-
-/* get message text for USB status code
- */
-static char *get_usb_statmsg(int status)
-{
- static char unkmsg[28];
-
- switch (status) {
- case 0:
- return "success";
- case -ENOENT:
- return "unlinked (sync)";
- case -EINPROGRESS:
- return "URB still pending";
- case -EPROTO:
- return "bitstuff error, timeout, or unknown USB error";
- case -EILSEQ:
- return "CRC mismatch, timeout, or unknown USB error";
- case -ETIME:
- return "USB response timeout";
- case -EPIPE:
- return "endpoint stalled";
- case -ECOMM:
- return "IN buffer overrun";
- case -ENOSR:
- return "OUT buffer underrun";
- case -EOVERFLOW:
- return "endpoint babble";
- case -EREMOTEIO:
- return "short packet";
- case -ENODEV:
- return "device removed";
- case -EXDEV:
- return "partial isoc transfer";
- case -EINVAL:
- return "ISO madness";
- case -ECONNRESET:
- return "unlinked (async)";
- case -ESHUTDOWN:
- return "device shut down";
- default:
- snprintf(unkmsg, sizeof(unkmsg), "unknown status %d", status);
- return unkmsg;
- }
-}
-
-/* usb_pipetype_str
- * retrieve string representation of USB pipe type
- */
-static inline char *usb_pipetype_str(int pipe)
-{
- if (usb_pipeisoc(pipe))
- return "Isoc";
- if (usb_pipeint(pipe))
- return "Int";
- if (usb_pipecontrol(pipe))
- return "Ctrl";
- if (usb_pipebulk(pipe))
- return "Bulk";
- return "?";
-}
-
-/* dump_urb
- * write content of URB to syslog for debugging
- */
-static inline void dump_urb(enum debuglevel level, const char *tag,
- struct urb *urb)
-{
-#ifdef CONFIG_GIGASET_DEBUG
- int i;
- gig_dbg(level, "%s urb(0x%08lx)->{", tag, (unsigned long) urb);
- if (urb) {
- gig_dbg(level,
- " dev=0x%08lx, pipe=%s:EP%d/DV%d:%s, "
- "hcpriv=0x%08lx, transfer_flags=0x%x,",
- (unsigned long) urb->dev,
- usb_pipetype_str(urb->pipe),
- usb_pipeendpoint(urb->pipe), usb_pipedevice(urb->pipe),
- usb_pipein(urb->pipe) ? "in" : "out",
- (unsigned long) urb->hcpriv,
- urb->transfer_flags);
- gig_dbg(level,
- " transfer_buffer=0x%08lx[%d], actual_length=%d, "
- "setup_packet=0x%08lx,",
- (unsigned long) urb->transfer_buffer,
- urb->transfer_buffer_length, urb->actual_length,
- (unsigned long) urb->setup_packet);
- gig_dbg(level,
- " start_frame=%d, number_of_packets=%d, interval=%d, "
- "error_count=%d,",
- urb->start_frame, urb->number_of_packets, urb->interval,
- urb->error_count);
- gig_dbg(level,
- " context=0x%08lx, complete=0x%08lx, "
- "iso_frame_desc[]={",
- (unsigned long) urb->context,
- (unsigned long) urb->complete);
- for (i = 0; i < urb->number_of_packets; i++) {
- struct usb_iso_packet_descriptor *pifd
- = &urb->iso_frame_desc[i];
- gig_dbg(level,
- " {offset=%u, length=%u, actual_length=%u, "
- "status=%u}",
- pifd->offset, pifd->length, pifd->actual_length,
- pifd->status);
- }
- }
- gig_dbg(level, "}}");
-#endif
-}
-
-/* read/set modem control bits etc. (m10x only) */
-static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
- unsigned new_state)
-{
- return -EINVAL;
-}
-
-static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
-{
- return -EINVAL;
-}
-
-static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
-{
- return -EINVAL;
-}
-
-/* set/clear bits in base connection state, return previous state
- */
-static inline int update_basstate(struct bas_cardstate *ucs,
- int set, int clear)
-{
- unsigned long flags;
- int state;
-
- spin_lock_irqsave(&ucs->lock, flags);
- state = ucs->basstate;
- ucs->basstate = (state & ~clear) | set;
- spin_unlock_irqrestore(&ucs->lock, flags);
- return state;
-}
-
-/* error_hangup
- * hang up any existing connection because of an unrecoverable error
- * This function may be called from any context and takes care of scheduling
- * the necessary actions for execution outside of interrupt context.
- * cs->lock must not be held.
- * argument:
- * B channel control structure
- */
-static inline void error_hangup(struct bc_state *bcs)
-{
- struct cardstate *cs = bcs->cs;
-
- gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL);
- gigaset_schedule_event(cs);
-}
-
-/* error_reset
- * reset Gigaset device because of an unrecoverable error
- * This function may be called from any context, and takes care of
- * scheduling the necessary actions for execution outside of interrupt context.
- * cs->hw.bas->lock must not be held.
- * argument:
- * controller state structure
- */
-static inline void error_reset(struct cardstate *cs)
-{
- /* reset interrupt pipe to recover (ignore errors) */
- update_basstate(cs->hw.bas, BS_RESETTING, 0);
- if (req_submit(cs->bcs, HD_RESET_INTERRUPT_PIPE, 0, BAS_TIMEOUT))
- /* submission failed, escalate to USB port reset */
- usb_queue_reset_device(cs->hw.bas->interface);
-}
-
-/* check_pending
- * check for completion of pending control request
- * parameter:
- * ucs hardware specific controller state structure
- */
-static void check_pending(struct bas_cardstate *ucs)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&ucs->lock, flags);
- switch (ucs->pending) {
- case 0:
- break;
- case HD_OPEN_ATCHANNEL:
- if (ucs->basstate & BS_ATOPEN)
- ucs->pending = 0;
- break;
- case HD_OPEN_B1CHANNEL:
- if (ucs->basstate & BS_B1OPEN)
- ucs->pending = 0;
- break;
- case HD_OPEN_B2CHANNEL:
- if (ucs->basstate & BS_B2OPEN)
- ucs->pending = 0;
- break;
- case HD_CLOSE_ATCHANNEL:
- if (!(ucs->basstate & BS_ATOPEN))
- ucs->pending = 0;
- break;
- case HD_CLOSE_B1CHANNEL:
- if (!(ucs->basstate & BS_B1OPEN))
- ucs->pending = 0;
- break;
- case HD_CLOSE_B2CHANNEL:
- if (!(ucs->basstate & BS_B2OPEN))
- ucs->pending = 0;
- break;
- case HD_DEVICE_INIT_ACK: /* no reply expected */
- ucs->pending = 0;
- break;
- case HD_RESET_INTERRUPT_PIPE:
- if (!(ucs->basstate & BS_RESETTING))
- ucs->pending = 0;
- break;
- /*
- * HD_READ_ATMESSAGE and HD_WRITE_ATMESSAGE are handled separately
- * and should never end up here
- */
- default:
- dev_warn(&ucs->interface->dev,
- "unknown pending request 0x%02x cleared\n",
- ucs->pending);
- ucs->pending = 0;
- }
-
- if (!ucs->pending)
- del_timer(&ucs->timer_ctrl);
-
- spin_unlock_irqrestore(&ucs->lock, flags);
-}
-
-/* cmd_in_timeout
- * timeout routine for command input request
- * argument:
- * controller state structure
- */
-static void cmd_in_timeout(struct timer_list *t)
-{
- struct bas_cardstate *ucs = from_timer(ucs, t, timer_cmd_in);
- struct cardstate *cs = ucs->cs;
- int rc;
-
- if (!ucs->rcvbuf_size) {
- gig_dbg(DEBUG_USBREQ, "%s: no receive in progress", __func__);
- return;
- }
-
- if (ucs->retry_cmd_in++ >= BAS_RETRY) {
- dev_err(cs->dev,
- "control read: timeout, giving up after %d tries\n",
- ucs->retry_cmd_in);
- kfree(ucs->rcvbuf);
- ucs->rcvbuf = NULL;
- ucs->rcvbuf_size = 0;
- error_reset(cs);
- return;
- }
-
- gig_dbg(DEBUG_USBREQ, "%s: timeout, retry %d",
- __func__, ucs->retry_cmd_in);
- rc = atread_submit(cs, BAS_TIMEOUT);
- if (rc < 0) {
- kfree(ucs->rcvbuf);
- ucs->rcvbuf = NULL;
- ucs->rcvbuf_size = 0;
- if (rc != -ENODEV)
- error_reset(cs);
- }
-}
-
-/* read_ctrl_callback
- * USB completion handler for control pipe input
- * called by the USB subsystem in interrupt context
- * parameter:
- * urb USB request block
- * urb->context = inbuf structure for controller state
- */
-static void read_ctrl_callback(struct urb *urb)
-{
- struct inbuf_t *inbuf = urb->context;
- struct cardstate *cs = inbuf->cs;
- struct bas_cardstate *ucs = cs->hw.bas;
- int status = urb->status;
- unsigned numbytes;
- int rc;
-
- update_basstate(ucs, 0, BS_ATRDPEND);
- wake_up(&ucs->waitqueue);
- del_timer(&ucs->timer_cmd_in);
-
- switch (status) {
- case 0: /* normal completion */
- numbytes = urb->actual_length;
- if (unlikely(numbytes != ucs->rcvbuf_size)) {
- dev_warn(cs->dev,
- "control read: received %d chars, expected %d\n",
- numbytes, ucs->rcvbuf_size);
- if (numbytes > ucs->rcvbuf_size)
- numbytes = ucs->rcvbuf_size;
- }
-
- /* copy received bytes to inbuf, notify event layer */
- if (gigaset_fill_inbuf(inbuf, ucs->rcvbuf, numbytes)) {
- gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
- gigaset_schedule_event(cs);
- }
- break;
-
- case -ENOENT: /* cancelled */
- case -ECONNRESET: /* cancelled (async) */
- case -EINPROGRESS: /* pending */
- case -ENODEV: /* device removed */
- case -ESHUTDOWN: /* device shut down */
- /* no further action necessary */
- gig_dbg(DEBUG_USBREQ, "%s: %s",
- __func__, get_usb_statmsg(status));
- break;
-
- default: /* other errors: retry */
- if (ucs->retry_cmd_in++ < BAS_RETRY) {
- gig_dbg(DEBUG_USBREQ, "%s: %s, retry %d", __func__,
- get_usb_statmsg(status), ucs->retry_cmd_in);
- rc = atread_submit(cs, BAS_TIMEOUT);
- if (rc >= 0)
- /* successfully resubmitted, skip freeing */
- return;
- if (rc == -ENODEV)
- /* disconnect, no further action necessary */
- break;
- }
- dev_err(cs->dev, "control read: %s, giving up after %d tries\n",
- get_usb_statmsg(status), ucs->retry_cmd_in);
- error_reset(cs);
- }
-
- /* read finished, free buffer */
- kfree(ucs->rcvbuf);
- ucs->rcvbuf = NULL;
- ucs->rcvbuf_size = 0;
-}
-
-/* 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);
- mod_timer(&ucs->timer_cmd_in, jiffies + timeout * HZ / 10);
- }
- return 0;
-}
-
-/* int_in_work
- * workqueue routine to clear halt on interrupt in endpoint
- */
-
-static void int_in_work(struct work_struct *work)
-{
- struct bas_cardstate *ucs =
- container_of(work, struct bas_cardstate, int_in_wq);
- struct urb *urb = ucs->urb_int_in;
- struct cardstate *cs = urb->context;
- int rc;
-
- /* clear halt condition */
- rc = usb_clear_halt(ucs->udev, urb->pipe);
- gig_dbg(DEBUG_USBREQ, "clear_halt: %s", get_usb_rcmsg(rc));
- if (rc == 0)
- /* success, resubmit interrupt read URB */
- rc = usb_submit_urb(urb, GFP_ATOMIC);
-
- switch (rc) {
- case 0: /* success */
- case -ENODEV: /* device gone */
- case -EINVAL: /* URB already resubmitted, or terminal badness */
- break;
- default: /* failure: try to recover by resetting the device */
- dev_err(cs->dev, "clear halt failed: %s\n", get_usb_rcmsg(rc));
- rc = usb_lock_device_for_reset(ucs->udev, ucs->interface);
- if (rc == 0) {
- rc = usb_reset_device(ucs->udev);
- usb_unlock_device(ucs->udev);
- }
- }
- ucs->retry_int_in = 0;
-}
-
-/* int_in_resubmit
- * timer routine for interrupt read delayed resubmit
- * argument:
- * controller state structure
- */
-static void int_in_resubmit(struct timer_list *t)
-{
- struct bas_cardstate *ucs = from_timer(ucs, t, timer_int_in);
- struct cardstate *cs = ucs->cs;
- int rc;
-
- if (ucs->retry_int_in++ >= BAS_RETRY) {
- dev_err(cs->dev, "interrupt read: giving up after %d tries\n",
- ucs->retry_int_in);
- usb_queue_reset_device(ucs->interface);
- return;
- }
-
- gig_dbg(DEBUG_USBREQ, "%s: retry %d", __func__, ucs->retry_int_in);
- rc = usb_submit_urb(ucs->urb_int_in, GFP_ATOMIC);
- if (rc != 0 && rc != -ENODEV) {
- dev_err(cs->dev, "could not resubmit interrupt URB: %s\n",
- get_usb_rcmsg(rc));
- usb_queue_reset_device(ucs->interface);
- }
-}
-
-/* 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 */
- ucs->retry_int_in = 0;
- break;
- case -EPIPE: /* endpoint stalled */
- schedule_work(&ucs->int_in_wq);
- /* fall through */
- case -ENOENT: /* cancelled */
- case -ECONNRESET: /* cancelled (async) */
- case -EINPROGRESS: /* pending */
- case -ENODEV: /* device removed */
- case -ESHUTDOWN: /* device shut down */
- /* no further action necessary */
- gig_dbg(DEBUG_USBREQ, "%s: %s",
- __func__, get_usb_statmsg(status));
- return;
- case -EPROTO: /* protocol error or unplug */
- case -EILSEQ:
- case -ETIME:
- /* resubmit after delay */
- gig_dbg(DEBUG_USBREQ, "%s: %s",
- __func__, get_usb_statmsg(status));
- mod_timer(&ucs->timer_int_in, jiffies + HZ / 10);
- return;
- default: /* other errors: just resubmit */
- 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;
- /* fall through */
- 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;
- /* fall through */
- 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;
- /* fall through */
- 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->basstate & BS_ATRDPEND) {
- spin_unlock_irqrestore(&cs->lock, flags);
- dev_warn(cs->dev,
- "HD_RECEIVEATDATA_ACK(%d) during HD_READ_ATMESSAGE(%d) ignored\n",
- l, ucs->rcvbuf_size);
- break;
- }
- 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");
- 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;
- }
- spin_unlock_irqrestore(&cs->lock, flags);
- if (rc < 0 && rc != -ENODEV)
- error_reset(cs);
- 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 */
- gig_dbg(DEBUG_ISO, "%s: overrun", __func__);
- 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;
- rc = usb_submit_urb(urb, GFP_ATOMIC);
- if (unlikely(rc != 0 && rc != -ENODEV)) {
- dev_err(bcs->cs->dev,
- "could not resubmit isoc 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 usb_device *udev = bcs->cs->hw.bas->udev;
- 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;
- }
- usb_fill_int_urb(urb, udev,
- usb_rcvisocpipe(udev, 3 + 2 * bcs->channel),
- ubc->isoinbuf + k * BAS_INBUFSIZE,
- BAS_INBUFSIZE, read_iso_callback, bcs,
- BAS_FRAMETIME);
-
- urb->transfer_flags = URB_ISO_ASAP;
- urb->number_of_packets = BAS_NUMFRAMES;
- 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;
- }
- usb_fill_int_urb(urb, udev,
- usb_sndisocpipe(udev, 4 + 2 * bcs->channel),
- ubc->isooutbuf->data,
- sizeof(ubc->isooutbuf->data),
- write_iso_callback, &ubc->isoouturbs[k],
- BAS_FRAMETIME);
-
- urb->transfer_flags = URB_ISO_ASAP;
- urb->number_of_packets = BAS_NUMFRAMES;
- 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 isoc 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;
- 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, "isoc write 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 isoc 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
- */
- 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,
- "isoc write: frame %d[%d/%d]: %s\n",
- i, ifd->actual_length,
- ifd->length,
- get_usb_statmsg(ifd->status));
- break;
- }
- }
- break;
- case -EPIPE: /* stall - probably underrun */
- dev_err(cs->dev, "isoc write: stalled\n");
- error_hangup(bcs);
- break;
- default: /* other errors */
- dev_warn(cs->dev, "isoc 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;
- struct usb_iso_packet_descriptor *ifd;
- 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,
- "isoc read overrun, URB dropped (status: %s, %d bytes)\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, "isoc read: stalled\n");
- error_hangup(bcs);
- continue; /* -> skip */
- default: /* other error */
- dev_warn(cs->dev, "isoc 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++) {
- ifd = &urb->iso_frame_desc[frame];
- numbytes = ifd->actual_length;
- switch (ifd->status) {
- case 0: /* success */
- break;
- case -EPROTO: /* protocol error or unplug */
- case -EILSEQ:
- case -ETIME:
- /* probably just disconnected, ignore */
- gig_dbg(DEBUG_ISO,
- "isoc read: frame %d[%d]: %s\n",
- frame, numbytes,
- get_usb_statmsg(ifd->status));
- break;
- default: /* other error */
- /* report, assume transferred bytes are ok */
- dev_warn(cs->dev,
- "isoc read: frame %d[%d]: %s\n",
- frame, numbytes,
- get_usb_statmsg(ifd->status));
- }
- if (unlikely(numbytes > BAS_MAXFRAME))
- dev_warn(cs->dev,
- "isoc read: frame %d[%d]: %s\n",
- frame, numbytes,
- "exceeds max frame size");
- if (unlikely(numbytes > totleft)) {
- dev_warn(cs->dev,
- "isoc read: frame %d[%d]: %s\n",
- frame, numbytes,
- "exceeds total transfer length");
- numbytes = totleft;
- }
- offset = ifd->offset;
- if (unlikely(offset + numbytes > BAS_INBUFSIZE)) {
- dev_warn(cs->dev,
- "isoc read: frame %d[%d]: %s\n",
- frame, numbytes,
- "exceeds end of buffer");
- numbytes = BAS_INBUFSIZE - offset;
- }
- gigaset_isoc_receive(rcvbuf + offset, numbytes, bcs);
- totleft -= numbytes;
- }
- if (unlikely(totleft > 0))
- dev_warn(cs->dev, "isoc 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 isoc read URB: %s\n",
- get_usb_rcmsg(rc));
- dump_urb(DEBUG_ISO, "resubmit isoc read", urb);
- error_hangup(bcs);
- }
- }
-}
-
-/* Channel Operations */
-/* ================== */
-
-/* req_timeout
- * timeout routine for control output request
- * argument:
- * controller state structure
- */
-static void req_timeout(struct timer_list *t)
-{
- struct bas_cardstate *ucs = from_timer(ucs, t, timer_ctrl);
- struct cardstate *cs = ucs->cs;
- 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(cs->dev, "timeout opening AT channel\n");
- error_reset(cs);
- break;
-
- case HD_OPEN_B1CHANNEL:
- dev_err(cs->dev, "timeout opening channel 1\n");
- error_hangup(&cs->bcs[0]);
- break;
-
- case HD_OPEN_B2CHANNEL:
- dev_err(cs->dev, "timeout opening channel 2\n");
- error_hangup(&cs->bcs[1]);
- break;
-
- case HD_CLOSE_ATCHANNEL:
- dev_err(cs->dev, "timeout closing AT channel\n");
- error_reset(cs);
- break;
-
- case HD_CLOSE_B1CHANNEL:
- dev_err(cs->dev, "timeout closing channel 1\n");
- error_reset(cs);
- break;
-
- case HD_CLOSE_B2CHANNEL:
- dev_err(cs->dev, "timeout closing channel 2\n");
- error_reset(cs);
- break;
-
- case HD_RESET_INTERRUPT_PIPE:
- /* error recovery escalation */
- dev_err(cs->dev,
- "reset interrupt pipe timeout, attempting USB reset\n");
- usb_queue_reset_device(ucs->interface);
- break;
-
- default:
- dev_warn(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);
- mod_timer(&ucs->timer_ctrl, jiffies + timeout * HZ / 10);
- }
-
- 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 isoc I/O, suspend in progress\n");
- spin_unlock_irqrestore(&cs->lock, flags);
- return -EHOSTUNREACH;
- }
-
- ret = starturbs(bcs);
- if (ret < 0) {
- spin_unlock_irqrestore(&cs->lock, flags);
- dev_err(cs->dev,
- "could not start isoc 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);
- 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);
- }
-
- spin_unlock_irqrestore(&cs->lock, flags);
- if (ret < 0 && ret != -ENODEV)
- error_hangup(bcs);
- 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(struct timer_list *t)
-{
- struct bas_cardstate *ucs = from_timer(ucs, t, timer_atrdy);
- struct cardstate *cs = ucs->cs;
-
- 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);
- mod_timer(&ucs->timer_atrdy, jiffies + ATRDY_TIMEOUT * HZ / 10);
- }
- 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
- * cb command buffer structure
- * return value:
- * number of bytes queued on success
- * error code < 0 on error
- */
-static int gigaset_write_cmd(struct cardstate *cs, struct cmdbuf_t *cb)
-{
- unsigned long flags;
- int rc;
-
- gigaset_dbg_buffer(cs->mstate != MS_LOCKED ?
- DEBUG_TRANSCMD : DEBUG_LOCKCMD,
- "CMD Transmit", cb->len, cb->buf);
-
- /* 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 (cb->len == 3 && !memcmp(cb->buf, "+++", 3)) {
- /* If an HD_RECEIVEATDATA_ACK message remains unhandled
- * because of an error, the base never sends another one.
- * The response channel is thus effectively blocked.
- * Closing and reopening the AT channel does *not* clear
- * this condition.
- * As a stopgap measure, submit a zero-length AT read
- * before closing the AT channel. This has the undocumented
- * effect of triggering a new HD_RECEIVEATDATA_ACK message
- * from the base if necessary.
- * The subsequent AT channel close then discards any pending
- * messages.
- */
- spin_lock_irqsave(&cs->lock, flags);
- if (!(cs->hw.bas->basstate & BS_ATRDPEND)) {
- kfree(cs->hw.bas->rcvbuf);
- cs->hw.bas->rcvbuf = NULL;
- cs->hw.bas->rcvbuf_size = 0;
- cs->hw.bas->retry_cmd_in = 0;
- atread_submit(cs, 0);
- }
- spin_unlock_irqrestore(&cs->lock, flags);
-
- rc = req_submit(cs->bcs, HD_CLOSE_ATCHANNEL, 0, BAS_TIMEOUT);
- if (cb->wake_tasklet)
- tasklet_schedule(cb->wake_tasklet);
- if (!rc)
- rc = cb->len;
- kfree(cb);
- return rc;
- }
-
- spin_lock_irqsave(&cs->cmdlock, flags);
- cb->prev = cs->lastcmdbuf;
- if (cs->lastcmdbuf)
- cs->lastcmdbuf->next = cb;
- else {
- cs->cmdbuf = cb;
- cs->curlen = cb->len;
- }
- cs->cmdbytes += cb->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 : cb->len;
-}
-
-/* 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
- */
-static void gigaset_freebcshw(struct bc_state *bcs)
-{
- struct bas_bc_state *ubc = bcs->hw.bas;
- int i;
-
- if (!ubc)
- return;
-
- /* kill URBs and tasklets before freeing - better safe than sorry */
- ubc->running = 0;
- gig_dbg(DEBUG_INIT, "%s: killing isoc 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;
-}
-
-/* Initialize hardware dependent part of the B channel structure
- * parameter:
- * bcs B channel structure
- * return value:
- * 0 on success, error code < 0 on failure
- */
-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 -ENOMEM;
- }
-
- 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 -ENOMEM;
- }
- 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 0;
-}
-
-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;
-}
-
-/* Initialize hardware dependent part of the cardstate structure
- * parameter:
- * cs cardstate structure
- * return value:
- * 0 on success, error code < 0 on failure
- */
-static int gigaset_initcshw(struct cardstate *cs)
-{
- struct bas_cardstate *ucs;
-
- cs->hw.bas = ucs = kzalloc(sizeof(*ucs), GFP_KERNEL);
- if (!ucs) {
- pr_err("out of memory\n");
- return -ENOMEM;
- }
- ucs->int_in_buf = kmalloc(IP_MSGSIZE, GFP_KERNEL);
- if (!ucs->int_in_buf) {
- kfree(ucs);
- pr_err("out of memory\n");
- return -ENOMEM;
- }
-
- spin_lock_init(&ucs->lock);
- ucs->cs = cs;
- timer_setup(&ucs->timer_ctrl, req_timeout, 0);
- timer_setup(&ucs->timer_atrdy, atrdy_timeout, 0);
- timer_setup(&ucs->timer_cmd_in, cmd_in_timeout, 0);
- timer_setup(&ucs->timer_int_in, int_in_resubmit, 0);
- init_waitqueue_head(&ucs->waitqueue);
- INIT_WORK(&ucs->int_in_wq, int_in_work);
-
- return 0;
-}
-
-/* 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;
- }
-
- if (hostif->desc.bNumEndpoints < 1)
- 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 initialize 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,
- usb_endpoint_num(endpoint)),
- 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;
- }
- ucs->retry_int_in = 0;
-
- /* 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);
-
- rc = gigaset_start(cs);
- if (rc < 0)
- goto error;
-
- return 0;
-
-allocerr:
- dev_err(cs->dev, "could not allocate URBs\n");
- rc = -ENOMEM;
-error:
- freeurbs(cs);
- usb_set_intfdata(interface, NULL);
- usb_put_dev(udev);
- gigaset_freecs(cs);
- return rc;
-}
-
-/* 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 delayed work and URBs, free ressources */
- del_timer_sync(&ucs->timer_ctrl);
- del_timer_sync(&ucs->timer_atrdy);
- del_timer_sync(&ucs->timer_cmd_in);
- del_timer_sync(&ucs->timer_int_in);
- cancel_work_sync(&ucs->int_in_wq);
- 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
- * or before the USB device is reset.
- * In the latter case, message == PMSG_ON.
- */
-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 delayed work that might still be pending */
- usb_kill_urb(ucs->urb_ctrl);
- usb_kill_urb(ucs->urb_int_in);
- del_timer_sync(&ucs->timer_ctrl);
- del_timer_sync(&ucs->timer_atrdy);
- del_timer_sync(&ucs->timer_cmd_in);
- del_timer_sync(&ucs->timer_int_in);
-
- /* don't try to cancel int_in_wq from within reset as it
- * might be the one requesting the reset
- */
- if (message.event != PM_EVENT_ON)
- cancel_work_sync(&ucs->int_in_wq);
-
- 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;
- }
- ucs->retry_int_in = 0;
-
- /* 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 = {
- .write_cmd = gigaset_write_cmd,
- .write_room = gigaset_write_room,
- .chars_in_buffer = gigaset_chars_in_buffer,
- .brkchars = gigaset_brkchars,
- .init_bchannel = gigaset_init_bchannel,
- .close_bchannel = gigaset_close_bchannel,
- .initbcshw = gigaset_initbcshw,
- .freebcshw = gigaset_freebcshw,
- .reinitbcshw = gigaset_reinitbcshw,
- .initcshw = gigaset_initcshw,
- .freecshw = gigaset_freecshw,
- .set_modem_ctrl = gigaset_set_modem_ctrl,
- .baud_rate = gigaset_baud_rate,
- .set_line_ctrl = gigaset_set_line_ctrl,
- .send_skb = gigaset_isoc_send_skb,
- .handle_input = 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 initialize 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");