diff options
Diffstat (limited to 'drivers/isdn/gigaset/bas-gigaset.c')
| -rw-r--r-- | drivers/isdn/gigaset/bas-gigaset.c | 2675 |
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"); |