| /* |
| * 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 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(unsigned long data) |
| { |
| struct cardstate *cs = (struct cardstate *) data; |
| struct bas_cardstate *ucs = cs->hw.bas; |
| 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); |
| if (rc != 0 && rc != -ENODEV) { |
| 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(unsigned long data) |
| { |
| struct cardstate *cs = (struct cardstate *) data; |
| struct bas_cardstate *ucs = cs->hw.bas; |
| 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; |
| case HD_OPEN_B1CHANNEL_ACK: |
| bcs = cs->bcs + channel; |
| update_basstate(ucs, BS_B1OPEN << channel, 0); |
| gigaset_bchannel_up(bcs); |
| break; |
| |
| case HD_OPEN_ATCHANNEL_ACK: |
| update_basstate(ucs, BS_ATOPEN, 0); |
| start_cbsend(cs); |
| break; |
| |
| case HD_CLOSE_B2CHANNEL_ACK: |
| ++channel; |
| case HD_CLOSE_B1CHANNEL_ACK: |
| bcs = cs->bcs + channel; |
| update_basstate(ucs, 0, BS_B1OPEN << channel); |
| stopurbs(bcs->hw.bas); |
| gigaset_bchannel_down(bcs); |
| break; |
| |
| case HD_CLOSE_ATCHANNEL_ACK: |
| update_basstate(ucs, 0, BS_ATOPEN); |
| break; |
| |
| case HD_B2_FLOW_CONTROL: |
| ++channel; |
| case HD_B1_FLOW_CONTROL: |
| bcs = cs->bcs + channel; |
| atomic_add((l - BAS_NORMFRAME) * BAS_CORRFRAMES, |
| &bcs->hw.bas->corrbytes); |
| gig_dbg(DEBUG_ISO, |
| "Flow control (channel %d, sub %d): 0x%02x => %d", |
| channel, bcs->hw.bas->numsub, l, |
| atomic_read(&bcs->hw.bas->corrbytes)); |
| break; |
| |
| case HD_RECEIVEATDATA_ACK: /* AT response ready to be received */ |
| if (!l) { |
| dev_warn(cs->dev, |
| "HD_RECEIVEATDATA_ACK with length 0 ignored\n"); |
| break; |
| } |
| spin_lock_irqsave(&cs->lock, flags); |
| if (ucs->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 bas_bc_state *ubc = bcs->hw.bas; |
| struct urb *urb; |
| int j, k; |
| int rc; |
| |
| /* initialize L2 reception */ |
| if (bcs->proto2 == L2_HDLC) |
| bcs->inputstate |= INS_flag_hunt; |
| |
| /* submit all isochronous input URBs */ |
| ubc->running = 1; |
| for (k = 0; k < BAS_INURBS; k++) { |
| urb = ubc->isoinurbs[k]; |
| if (!urb) { |
| rc = -EFAULT; |
| goto error; |
| } |
| |
| urb->dev = bcs->cs->hw.bas->udev; |
| urb->pipe = usb_rcvisocpipe(urb->dev, 3 + 2 * bcs->channel); |
| urb->transfer_flags = URB_ISO_ASAP; |
| urb->transfer_buffer = ubc->isoinbuf + k * BAS_INBUFSIZE; |
| urb->transfer_buffer_length = BAS_INBUFSIZE; |
| urb->number_of_packets = BAS_NUMFRAMES; |
| urb->interval = BAS_FRAMETIME; |
| urb->complete = read_iso_callback; |
| urb->context = bcs; |
| for (j = 0; j < BAS_NUMFRAMES; j++) { |
| urb->iso_frame_desc[j].offset = j * BAS_MAXFRAME; |
| urb->iso_frame_desc[j].length = BAS_MAXFRAME; |
| urb->iso_frame_desc[j].status = 0; |
| urb->iso_frame_desc[j].actual_length = 0; |
| } |
| |
| dump_urb(DEBUG_ISO, "Initial isoc read", urb); |
| rc = usb_submit_urb(urb, GFP_ATOMIC); |
| if (rc != 0) |
| goto error; |
| } |
| |
| /* initialize L2 transmission */ |
| gigaset_isowbuf_init(ubc->isooutbuf, PPP_FLAG); |
| |
| /* set up isochronous output URBs for flag idling */ |
| for (k = 0; k < BAS_OUTURBS; ++k) { |
| urb = ubc->isoouturbs[k].urb; |
| if (!urb) { |
| rc = -EFAULT; |
| goto error; |
| } |
| urb->dev = bcs->cs->hw.bas->udev; |
| urb->pipe = usb_sndisocpipe(urb->dev, 4 + 2 * bcs->channel); |
| urb->transfer_flags = URB_ISO_ASAP; |
| urb->transfer_buffer = ubc->isooutbuf->data; |
| urb->transfer_buffer_length = sizeof(ubc->isooutbuf->data); |
| urb->number_of_packets = BAS_NUMFRAMES; |
| urb->interval = BAS_FRAMETIME; |
| urb->complete = write_iso_callback; |
| urb->context = &ubc->isoouturbs[k]; |
| for (j = 0; j < BAS_NUMFRAMES; ++j) { |
| urb->iso_frame_desc[j].offset = BAS_OUTBUFSIZE; |
| urb->iso_frame_desc[j].length = BAS_NORMFRAME; |
| urb->iso_frame_desc[j].status = 0; |
| urb->iso_frame_desc[j].actual_length = 0; |
| } |
| ubc->isoouturbs[k].limit = -1; |
| } |
| |
| /* keep one URB free, submit the others */ |
| for (k = 0; k < BAS_OUTURBS - 1; ++k) { |
| dump_urb(DEBUG_ISO, "Initial isoc write", urb); |
| rc = usb_submit_urb(ubc->isoouturbs[k].urb, GFP_ATOMIC); |
| if (rc != 0) |
| goto error; |
| } |
| dump_urb(DEBUG_ISO, "Initial isoc write (free)", urb); |
| ubc->isooutfree = &ubc->isoouturbs[BAS_OUTURBS - 1]; |
| ubc->isooutdone = ubc->isooutovfl = NULL; |
| return 0; |
| error: |
| stopurbs(ubc); |
| return rc; |
| } |
| |
| /* stopurbs |
| * cancel the USB request blocks for isochronous input and output |
| * errors are silently ignored |
| * argument: |
| * B channel control structure |
| */ |
| static void stopurbs(struct bas_bc_state *ubc) |
| { |
| int k, rc; |
| |
| ubc->running = 0; |
| |
| for (k = 0; k < BAS_INURBS; ++k) { |
| rc = usb_unlink_urb(ubc->isoinurbs[k]); |
| gig_dbg(DEBUG_ISO, |
| "%s: isoc input URB %d unlinked, result = %s", |
| __func__, k, get_usb_rcmsg(rc)); |
| } |
| |
| for (k = 0; k < BAS_OUTURBS; ++k) { |
| rc = usb_unlink_urb(ubc->isoouturbs[k].urb); |
| gig_dbg(DEBUG_ISO, |
| "%s: isoc output URB %d unlinked, result = %s", |
| __func__, k, get_usb_rcmsg(rc)); |
| } |
| } |
| |
| /* Isochronous Write - Bottom Half */ |
| /* =============================== */ |
| |
| /* submit_iso_write_urb |
| * fill and submit the next isochronous write URB |
| * parameters: |
| * ucx context structure containing URB |
| * return value: |
| * number of frames submitted in URB |
| * 0 if URB not submitted because no data available (isooutbuf busy) |
| * error code < 0 on error |
| */ |
| static int submit_iso_write_urb(struct isow_urbctx_t *ucx) |
| { |
| struct urb *urb = ucx->urb; |
| struct bas_bc_state *ubc = ucx->bcs->hw.bas; |
| struct usb_iso_packet_descriptor *ifd; |
| int corrbytes, nframe, rc; |
| |
| /* urb->dev is clobbered by USB subsystem */ |
| urb->dev = ucx->bcs->cs->hw.bas->udev; |
| urb->transfer_flags = URB_ISO_ASAP; |
| urb->transfer_buffer = ubc->isooutbuf->data; |
| urb->transfer_buffer_length = sizeof(ubc->isooutbuf->data); |
| |
| for (nframe = 0; nframe < BAS_NUMFRAMES; nframe++) { |
| ifd = &urb->iso_frame_desc[nframe]; |
| |
| /* compute frame length according to flow control */ |
| ifd->length = BAS_NORMFRAME; |
| corrbytes = atomic_read(&ubc->corrbytes); |
| if (corrbytes != 0) { |
| gig_dbg(DEBUG_ISO, "%s: corrbytes=%d", |
| __func__, corrbytes); |
| if (corrbytes > BAS_HIGHFRAME - BAS_NORMFRAME) |
| corrbytes = BAS_HIGHFRAME - BAS_NORMFRAME; |
| else if (corrbytes < BAS_LOWFRAME - BAS_NORMFRAME) |
| corrbytes = BAS_LOWFRAME - BAS_NORMFRAME; |
| ifd->length += corrbytes; |
| atomic_add(-corrbytes, &ubc->corrbytes); |
| } |
| |
| /* retrieve block of data to send */ |
| rc = gigaset_isowbuf_getbytes(ubc->isooutbuf, ifd->length); |
| if (rc < 0) { |
| if (rc == -EBUSY) { |
| gig_dbg(DEBUG_ISO, |
| "%s: buffer busy at frame %d", |
| __func__, nframe); |
| /* tasklet will be restarted from |
| gigaset_isoc_send_skb() */ |
| } else { |
| dev_err(ucx->bcs->cs->dev, |
| "%s: buffer error %d at frame %d\n", |
| __func__, rc, nframe); |
| return rc; |
| } |
| break; |
| } |
| ifd->offset = rc; |
| ucx->limit = ubc->isooutbuf->nextread; |
| ifd->status = 0; |
| ifd->actual_length = 0; |
| } |
| if (unlikely(nframe == 0)) |
| return 0; /* no data to send */ |
| urb->number_of_packets = nframe; |
| |
| rc = usb_submit_urb(urb, GFP_ATOMIC); |
| if (unlikely(rc)) { |
| if (rc == -ENODEV) |
| /* device removed - give up silently */ |
| gig_dbg(DEBUG_ISO, "%s: disconnected", __func__); |
| else |
| dev_err(ucx->bcs->cs->dev, |
| "could not submit 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(unsigned long data) |
| { |
| struct cardstate *cs = (struct cardstate *) data; |
| struct bas_cardstate *ucs = cs->hw.bas; |
| int pending; |
| unsigned long flags; |
| |
| check_pending(ucs); |
| |
| spin_lock_irqsave(&ucs->lock, flags); |
| pending = ucs->pending; |
| ucs->pending = 0; |
| spin_unlock_irqrestore(&ucs->lock, flags); |
| |
| switch (pending) { |
| case 0: /* no pending request */ |
| gig_dbg(DEBUG_USBREQ, "%s: no request pending", __func__); |
| break; |
| |
| case HD_OPEN_ATCHANNEL: |
| dev_err(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(unsigned long data) |
| { |
| struct cardstate *cs = (struct cardstate *) data; |
| struct bas_cardstate *ucs = cs->hw.bas; |
| |
| dev_warn(cs->dev, "timeout waiting for HD_READY_SEND_ATDATA\n"); |
| |
| /* fake the missing signal - what else can I do? */ |
| update_basstate(ucs, BS_ATREADY, BS_ATTIMER); |
| start_cbsend(cs); |
| } |
| |
| /* atwrite_submit |
| * submit an HD_WRITE_ATMESSAGE command URB |
| * parameters: |
| * cs controller state structure |
| * buf buffer containing command to send |
| * len length of command to send |
| * return value: |
| * 0 on success |
| * -EBUSY if another request is pending |
| * any URB submission error code |
| */ |
| static int atwrite_submit(struct cardstate *cs, unsigned char *buf, int len) |
| { |
| struct bas_cardstate *ucs = cs->hw.bas; |
| int rc; |
| |
| gig_dbg(DEBUG_USBREQ, "-------> HD_WRITE_ATMESSAGE (%d)", len); |
| |
| if (update_basstate(ucs, BS_ATWRPEND, 0) & BS_ATWRPEND) { |
| dev_err(cs->dev, |
| "could not submit HD_WRITE_ATMESSAGE: URB busy\n"); |
| return -EBUSY; |
| } |
| |
| ucs->dr_cmd_out.bRequestType = OUT_VENDOR_REQ; |
| ucs->dr_cmd_out.bRequest = HD_WRITE_ATMESSAGE; |
| ucs->dr_cmd_out.wValue = 0; |
| ucs->dr_cmd_out.wIndex = 0; |
| ucs->dr_cmd_out.wLength = cpu_to_le16(len); |
| usb_fill_control_urb(ucs->urb_cmd_out, ucs->udev, |
| usb_sndctrlpipe(ucs->udev, 0), |
| (unsigned char *) &ucs->dr_cmd_out, buf, len, |
| write_command_callback, cs); |
| rc = usb_submit_urb(ucs->urb_cmd_out, GFP_ATOMIC); |
| if (unlikely(rc)) { |
| update_basstate(ucs, 0, BS_ATWRPEND); |
| dev_err(cs->dev, "could not submit HD_WRITE_ATMESSAGE: %s\n", |
| get_usb_rcmsg(rc)); |
| return rc; |
| } |
| |
| /* submitted successfully, start timeout if necessary */ |
| if (!(update_basstate(ucs, BS_ATTIMER, BS_ATREADY) & BS_ATTIMER)) { |
| gig_dbg(DEBUG_OUTPUT, "setting ATREADY timeout of %d/10 secs", |
| ATRDY_TIMEOUT); |
| 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 |
| * return value: |
| * !=0 on success |
| */ |
| static int gigaset_freebcshw(struct bc_state *bcs) |
| { |
| struct bas_bc_state *ubc = bcs->hw.bas; |
| int i; |
| |
| if (!ubc) |
| return 0; |
| |
| /* kill URBs and tasklets before freeing - better safe than sorry */ |
| ubc->running = 0; |
| gig_dbg(DEBUG_INIT, "%s: killing 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; |
| return 1; |
| } |
| |
| /* Initialize hardware dependent part of the B channel structure |
| * parameter: |
| * bcs B channel structure |
| * return value: |
| * !=0 on success |
| */ |
| static int gigaset_initbcshw(struct bc_state *bcs) |
| { |
| int i; |
| struct bas_bc_state *ubc; |
| |
| bcs->hw.bas = ubc = kmalloc(sizeof(struct bas_bc_state), GFP_KERNEL); |
| if (!ubc) { |
| pr_err("out of memory\n"); |
| return 0; |
| } |
| |
| ubc->running = 0; |
| atomic_set(&ubc->corrbytes, 0); |
| spin_lock_init(&ubc->isooutlock); |
| for (i = 0; i < BAS_OUTURBS; ++i) { |
| ubc->isoouturbs[i].urb = NULL; |
| ubc->isoouturbs[i].bcs = bcs; |
| } |
| ubc->isooutdone = ubc->isooutfree = ubc->isooutovfl = NULL; |
| ubc->numsub = 0; |
| ubc->isooutbuf = kmalloc(sizeof(struct isowbuf_t), GFP_KERNEL); |
| if (!ubc->isooutbuf) { |
| pr_err("out of memory\n"); |
| kfree(ubc); |
| bcs->hw.bas = NULL; |
| return 0; |
| } |
| tasklet_init(&ubc->sent_tasklet, |
| write_iso_tasklet, (unsigned long) bcs); |
| |
| spin_lock_init(&ubc->isoinlock); |
| for (i = 0; i < BAS_INURBS; ++i) |
| ubc->isoinurbs[i] = NULL; |
| ubc->isoindone = NULL; |
| ubc->loststatus = -EINPROGRESS; |
| ubc->isoinlost = 0; |
| ubc->seqlen = 0; |
| ubc->inbyte = 0; |
| ubc->inbits = 0; |
| ubc->goodbytes = 0; |
| ubc->alignerrs = 0; |
| ubc->fcserrs = 0; |
| ubc->frameerrs = 0; |
| ubc->giants = 0; |
| ubc->runts = 0; |
| ubc->aborts = 0; |
| ubc->shared0s = 0; |
| ubc->stolen0s = 0; |
| tasklet_init(&ubc->rcvd_tasklet, |
| read_iso_tasklet, (unsigned long) bcs); |
| return 1; |
| } |
| |
| static void gigaset_reinitbcshw(struct bc_state *bcs) |
| { |
| struct bas_bc_state *ubc = bcs->hw.bas; |
| |
| bcs->hw.bas->running = 0; |
| atomic_set(&bcs->hw.bas->corrbytes, 0); |
| bcs->hw.bas->numsub = 0; |
| spin_lock_init(&ubc->isooutlock); |
| spin_lock_init(&ubc->isoinlock); |
| ubc->loststatus = -EINPROGRESS; |
| } |
| |
| static void gigaset_freecshw(struct cardstate *cs) |
| { |
| /* timers, URBs and rcvbuf are disposed of in disconnect */ |
| kfree(cs->hw.bas->int_in_buf); |
| kfree(cs->hw.bas); |
| cs->hw.bas = NULL; |
| } |
| |
| static int gigaset_initcshw(struct cardstate *cs) |
| { |
| struct bas_cardstate *ucs; |
| |
| cs->hw.bas = ucs = kmalloc(sizeof *ucs, GFP_KERNEL); |
| if (!ucs) { |
| pr_err("out of memory\n"); |
| return 0; |
| } |
| ucs->int_in_buf = kmalloc(IP_MSGSIZE, GFP_KERNEL); |
| if (!ucs->int_in_buf) { |
| kfree(ucs); |
| pr_err("out of memory\n"); |
| return 0; |
| } |
| |
| ucs->urb_cmd_in = NULL; |
| ucs->urb_cmd_out = NULL; |
| ucs->rcvbuf = NULL; |
| ucs->rcvbuf_size = 0; |
| |
| spin_lock_init(&ucs->lock); |
| ucs->pending = 0; |
| |
| ucs->basstate = 0; |
| setup_timer(&ucs->timer_ctrl, req_timeout, (unsigned long) cs); |
| setup_timer(&ucs->timer_atrdy, atrdy_timeout, (unsigned long) cs); |
| setup_timer(&ucs->timer_cmd_in, cmd_in_timeout, (unsigned long) cs); |
| setup_timer(&ucs->timer_int_in, int_in_resubmit, (unsigned long) cs); |
| init_waitqueue_head(&ucs->waitqueue); |
| INIT_WORK(&ucs->int_in_wq, int_in_work); |
| |
| return 1; |
| } |
| |
| /* freeurbs |
| * unlink and deallocate all URBs unconditionally |
| * caller must make sure that no commands are still in progress |
| * parameter: |
| * cs controller state structure |
| */ |
| static void freeurbs(struct cardstate *cs) |
| { |
| struct bas_cardstate *ucs = cs->hw.bas; |
| struct bas_bc_state *ubc; |
| int i, j; |
| |
| gig_dbg(DEBUG_INIT, "%s: killing URBs", __func__); |
| for (j = 0; j < BAS_CHANNELS; ++j) { |
| ubc = cs->bcs[j].hw.bas; |
| for (i = 0; i < BAS_OUTURBS; ++i) { |
| usb_kill_urb(ubc->isoouturbs[i].urb); |
| usb_free_urb(ubc->isoouturbs[i].urb); |
| ubc->isoouturbs[i].urb = NULL; |
| } |
| for (i = 0; i < BAS_INURBS; ++i) { |
| usb_kill_urb(ubc->isoinurbs[i]); |
| usb_free_urb(ubc->isoinurbs[i]); |
| ubc->isoinurbs[i] = NULL; |
| } |
| } |
| usb_kill_urb(ucs->urb_int_in); |
| usb_free_urb(ucs->urb_int_in); |
| ucs->urb_int_in = NULL; |
| usb_kill_urb(ucs->urb_cmd_out); |
| usb_free_urb(ucs->urb_cmd_out); |
| ucs->urb_cmd_out = NULL; |
| usb_kill_urb(ucs->urb_cmd_in); |
| usb_free_urb(ucs->urb_cmd_in); |
| ucs->urb_cmd_in = NULL; |
| usb_kill_urb(ucs->urb_ctrl); |
| usb_free_urb(ucs->urb_ctrl); |
| ucs->urb_ctrl = NULL; |
| } |
| |
| /* gigaset_probe |
| * This function is called when a new USB device is connected. |
| * It checks whether the new device is handled by this driver. |
| */ |
| static int gigaset_probe(struct usb_interface *interface, |
| const struct usb_device_id *id) |
| { |
| struct usb_host_interface *hostif; |
| struct usb_device *udev = interface_to_usbdev(interface); |
| struct cardstate *cs = NULL; |
| struct bas_cardstate *ucs = NULL; |
| struct bas_bc_state *ubc; |
| struct usb_endpoint_descriptor *endpoint; |
| int i, j; |
| int rc; |
| |
| gig_dbg(DEBUG_INIT, |
| "%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)", |
| __func__, le16_to_cpu(udev->descriptor.idVendor), |
| le16_to_cpu(udev->descriptor.idProduct)); |
| |
| /* set required alternate setting */ |
| hostif = interface->cur_altsetting; |
| if (hostif->desc.bAlternateSetting != 3) { |
| gig_dbg(DEBUG_INIT, |
| "%s: wrong alternate setting %d - trying to switch", |
| __func__, hostif->desc.bAlternateSetting); |
| if (usb_set_interface(udev, hostif->desc.bInterfaceNumber, 3) |
| < 0) { |
| dev_warn(&udev->dev, "usb_set_interface failed, " |
| "device %d interface %d altsetting %d\n", |
| udev->devnum, hostif->desc.bInterfaceNumber, |
| hostif->desc.bAlternateSetting); |
| return -ENODEV; |
| } |
| hostif = interface->cur_altsetting; |
| } |
| |
| /* Reject application specific interfaces |
| */ |
| if (hostif->desc.bInterfaceClass != 255) { |
| dev_warn(&udev->dev, "%s: bInterfaceClass == %d\n", |
| __func__, hostif->desc.bInterfaceClass); |
| return -ENODEV; |
| } |
| |
| dev_info(&udev->dev, |
| "%s: Device matched (Vendor: 0x%x, Product: 0x%x)\n", |
| __func__, le16_to_cpu(udev->descriptor.idVendor), |
| le16_to_cpu(udev->descriptor.idProduct)); |
| |
| /* allocate memory for our device state and 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, |
| (endpoint->bEndpointAddress) & 0x0f), |
| ucs->int_in_buf, IP_MSGSIZE, read_int_callback, cs, |
| endpoint->bInterval); |
| rc = usb_submit_urb(ucs->urb_int_in, GFP_KERNEL); |
| if (rc != 0) { |
| dev_err(cs->dev, "could not submit interrupt URB: %s\n", |
| get_usb_rcmsg(rc)); |
| goto error; |
| } |
| 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); |
| |
| if (!gigaset_start(cs)) |
| goto error; |
| |
| return 0; |
| |
| allocerr: |
| dev_err(cs->dev, "could not allocate URBs\n"); |
| error: |
| freeurbs(cs); |
| usb_set_intfdata(interface, NULL); |
| gigaset_freecs(cs); |
| return -ENODEV; |
| } |
| |
| /* gigaset_disconnect |
| * This function is called when the Gigaset base is unplugged. |
| */ |
| static void gigaset_disconnect(struct usb_interface *interface) |
| { |
| struct cardstate *cs; |
| struct bas_cardstate *ucs; |
| int j; |
| |
| cs = usb_get_intfdata(interface); |
| |
| ucs = cs->hw.bas; |
| |
| dev_info(cs->dev, "disconnecting Gigaset base\n"); |
| |
| /* mark base as not ready, all channels disconnected */ |
| ucs->basstate = 0; |
| |
| /* tell LL all channels are down */ |
| for (j = 0; j < BAS_CHANNELS; ++j) |
| gigaset_bchannel_down(cs->bcs + j); |
| |
| /* stop driver (common part) */ |
| gigaset_stop(cs); |
| |
| /* stop 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. |
| */ |
| 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); |
| 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 = { |
| gigaset_write_cmd, |
| gigaset_write_room, |
| gigaset_chars_in_buffer, |
| gigaset_brkchars, |
| gigaset_init_bchannel, |
| gigaset_close_bchannel, |
| gigaset_initbcshw, |
| gigaset_freebcshw, |
| gigaset_reinitbcshw, |
| gigaset_initcshw, |
| gigaset_freecshw, |
| gigaset_set_modem_ctrl, |
| gigaset_baud_rate, |
| gigaset_set_line_ctrl, |
| gigaset_isoc_send_skb, |
| gigaset_isoc_input, |
| }; |
| |
| /* bas_gigaset_init |
| * This function is called after the kernel module is loaded. |
| */ |
| static int __init bas_gigaset_init(void) |
| { |
| int result; |
| |
| /* allocate memory for our driver state and 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"); |