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cf7776dc HL |
1 | /* |
2 | * USB driver for Gigaset 307x base via direct USB connection. | |
3 | * | |
4 | * Copyright (c) 2001 by Hansjoerg Lipp <hjlipp@web.de>, | |
5 | * Tilman Schmidt <tilman@imap.cc>, | |
70440cf2 | 6 | * Stefan Eilers. |
cf7776dc | 7 | * |
cf7776dc HL |
8 | * ===================================================================== |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License as | |
11 | * published by the Free Software Foundation; either version 2 of | |
12 | * the License, or (at your option) any later version. | |
13 | * ===================================================================== | |
cf7776dc HL |
14 | */ |
15 | ||
16 | #include "gigaset.h" | |
17 | ||
18 | #include <linux/errno.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/timer.h> | |
22 | #include <linux/usb.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/moduleparam.h> | |
25 | ||
26 | /* Version Information */ | |
70440cf2 | 27 | #define DRIVER_AUTHOR "Tilman Schmidt <tilman@imap.cc>, Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers" |
cf7776dc HL |
28 | #define DRIVER_DESC "USB Driver for Gigaset 307x" |
29 | ||
30 | ||
31 | /* Module parameters */ | |
32 | ||
33 | static int startmode = SM_ISDN; | |
34 | static int cidmode = 1; | |
35 | ||
36 | module_param(startmode, int, S_IRUGO); | |
37 | module_param(cidmode, int, S_IRUGO); | |
38 | MODULE_PARM_DESC(startmode, "start in isdn4linux mode"); | |
39 | MODULE_PARM_DESC(cidmode, "Call-ID mode"); | |
40 | ||
41 | #define GIGASET_MINORS 1 | |
42 | #define GIGASET_MINOR 16 | |
43 | #define GIGASET_MODULENAME "bas_gigaset" | |
44 | #define GIGASET_DEVFSNAME "gig/bas/" | |
45 | #define GIGASET_DEVNAME "ttyGB" | |
46 | ||
73a88814 TS |
47 | /* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */ |
48 | #define IF_WRITEBUF 264 | |
cf7776dc HL |
49 | |
50 | /* Values for the Gigaset 307x */ | |
51 | #define USB_GIGA_VENDOR_ID 0x0681 | |
73a88814 TS |
52 | #define USB_3070_PRODUCT_ID 0x0001 |
53 | #define USB_3075_PRODUCT_ID 0x0002 | |
cf7776dc HL |
54 | #define USB_SX303_PRODUCT_ID 0x0021 |
55 | #define USB_SX353_PRODUCT_ID 0x0022 | |
56 | ||
57 | /* table of devices that work with this driver */ | |
58 | static struct usb_device_id gigaset_table [] = { | |
73a88814 TS |
59 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_3070_PRODUCT_ID) }, |
60 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_3075_PRODUCT_ID) }, | |
cf7776dc HL |
61 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX303_PRODUCT_ID) }, |
62 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX353_PRODUCT_ID) }, | |
63 | { } /* Terminating entry */ | |
64 | }; | |
65 | ||
66 | MODULE_DEVICE_TABLE(usb, gigaset_table); | |
67 | ||
06163f86 | 68 | /*======================= local function prototypes ==========================*/ |
cf7776dc | 69 | |
06163f86 | 70 | /* function called if a new device belonging to this driver is connected */ |
cf7776dc HL |
71 | static int gigaset_probe(struct usb_interface *interface, |
72 | const struct usb_device_id *id); | |
73 | ||
74 | /* Function will be called if the device is unplugged */ | |
75 | static void gigaset_disconnect(struct usb_interface *interface); | |
76 | ||
06163f86 | 77 | static int atread_submit(struct cardstate *, int); |
73a88814 | 78 | static void stopurbs(struct bas_bc_state *); |
06163f86 | 79 | static int req_submit(struct bc_state *, int, int, int); |
73a88814 TS |
80 | static int atwrite_submit(struct cardstate *, unsigned char *, int); |
81 | static int start_cbsend(struct cardstate *); | |
cf7776dc | 82 | |
06163f86 | 83 | /*============================================================================*/ |
cf7776dc HL |
84 | |
85 | struct bas_cardstate { | |
784d5858 TS |
86 | struct usb_device *udev; /* USB device pointer */ |
87 | struct usb_interface *interface; /* interface for this device */ | |
cf7776dc HL |
88 | unsigned char minor; /* starting minor number */ |
89 | ||
784d5858 | 90 | struct urb *urb_ctrl; /* control pipe default URB */ |
cf7776dc HL |
91 | struct usb_ctrlrequest dr_ctrl; |
92 | struct timer_list timer_ctrl; /* control request timeout */ | |
06163f86 | 93 | int retry_ctrl; |
cf7776dc HL |
94 | |
95 | struct timer_list timer_atrdy; /* AT command ready timeout */ | |
784d5858 | 96 | struct urb *urb_cmd_out; /* for sending AT commands */ |
cf7776dc HL |
97 | struct usb_ctrlrequest dr_cmd_out; |
98 | int retry_cmd_out; | |
99 | ||
784d5858 | 100 | struct urb *urb_cmd_in; /* for receiving AT replies */ |
cf7776dc HL |
101 | struct usb_ctrlrequest dr_cmd_in; |
102 | struct timer_list timer_cmd_in; /* receive request timeout */ | |
784d5858 | 103 | unsigned char *rcvbuf; /* AT reply receive buffer */ |
cf7776dc | 104 | |
784d5858 | 105 | struct urb *urb_int_in; /* URB for interrupt pipe */ |
cf7776dc HL |
106 | unsigned char int_in_buf[3]; |
107 | ||
108 | spinlock_t lock; /* locks all following */ | |
109 | atomic_t basstate; /* bitmap (BS_*) */ | |
110 | int pending; /* uncompleted base request */ | |
111 | int rcvbuf_size; /* size of AT receive buffer */ | |
112 | /* 0: no receive in progress */ | |
113 | int retry_cmd_in; /* receive req retry count */ | |
114 | }; | |
115 | ||
116 | /* status of direct USB connection to 307x base (bits in basstate) */ | |
73a88814 TS |
117 | #define BS_ATOPEN 0x001 /* AT channel open */ |
118 | #define BS_B1OPEN 0x002 /* B channel 1 open */ | |
119 | #define BS_B2OPEN 0x004 /* B channel 2 open */ | |
120 | #define BS_ATREADY 0x008 /* base ready for AT command */ | |
121 | #define BS_INIT 0x010 /* base has signalled INIT_OK */ | |
122 | #define BS_ATTIMER 0x020 /* waiting for HD_READY_SEND_ATDATA */ | |
123 | #define BS_ATRDPEND 0x040 /* urb_cmd_in in use */ | |
124 | #define BS_ATWRPEND 0x080 /* urb_cmd_out in use */ | |
cf7776dc HL |
125 | |
126 | ||
127 | static struct gigaset_driver *driver = NULL; | |
128 | static struct cardstate *cardstate = NULL; | |
129 | ||
130 | /* usb specific object needed to register this driver with the usb subsystem */ | |
131 | static struct usb_driver gigaset_usb_driver = { | |
132 | .name = GIGASET_MODULENAME, | |
133 | .probe = gigaset_probe, | |
134 | .disconnect = gigaset_disconnect, | |
135 | .id_table = gigaset_table, | |
136 | }; | |
137 | ||
73a88814 TS |
138 | /* get message text for usb_submit_urb return code |
139 | */ | |
140 | static char *get_usb_rcmsg(int rc) | |
141 | { | |
142 | static char unkmsg[28]; | |
143 | ||
144 | switch (rc) { | |
145 | case 0: | |
146 | return "success"; | |
147 | case -ENOMEM: | |
148 | return "out of memory"; | |
149 | case -ENODEV: | |
150 | return "device not present"; | |
151 | case -ENOENT: | |
152 | return "endpoint not present"; | |
153 | case -ENXIO: | |
154 | return "URB type not supported"; | |
155 | case -EINVAL: | |
156 | return "invalid argument"; | |
157 | case -EAGAIN: | |
158 | return "start frame too early or too much scheduled"; | |
159 | case -EFBIG: | |
160 | return "too many isochronous frames requested"; | |
161 | case -EPIPE: | |
162 | return "endpoint stalled"; | |
163 | case -EMSGSIZE: | |
164 | return "invalid packet size"; | |
165 | case -ENOSPC: | |
166 | return "would overcommit USB bandwidth"; | |
167 | case -ESHUTDOWN: | |
168 | return "device shut down"; | |
169 | case -EPERM: | |
170 | return "reject flag set"; | |
171 | case -EHOSTUNREACH: | |
172 | return "device suspended"; | |
173 | default: | |
174 | snprintf(unkmsg, sizeof(unkmsg), "unknown error %d", rc); | |
175 | return unkmsg; | |
176 | } | |
177 | } | |
178 | ||
cf7776dc HL |
179 | /* get message text for USB status code |
180 | */ | |
181 | static char *get_usb_statmsg(int status) | |
182 | { | |
183 | static char unkmsg[28]; | |
184 | ||
185 | switch (status) { | |
186 | case 0: | |
187 | return "success"; | |
188 | case -ENOENT: | |
73a88814 | 189 | return "unlinked (sync)"; |
cf7776dc HL |
190 | case -EINPROGRESS: |
191 | return "pending"; | |
192 | case -EPROTO: | |
73a88814 | 193 | return "bit stuffing error, timeout, or unknown USB error"; |
cf7776dc | 194 | case -EILSEQ: |
73a88814 | 195 | return "CRC mismatch, timeout, or unknown USB error"; |
cf7776dc HL |
196 | case -ETIMEDOUT: |
197 | return "timed out"; | |
73a88814 TS |
198 | case -EPIPE: |
199 | return "endpoint stalled"; | |
200 | case -ECOMM: | |
201 | return "IN buffer overrun"; | |
202 | case -ENOSR: | |
203 | return "OUT buffer underrun"; | |
204 | case -EOVERFLOW: | |
205 | return "too much data"; | |
cf7776dc HL |
206 | case -EREMOTEIO: |
207 | return "short packet detected"; | |
73a88814 TS |
208 | case -ENODEV: |
209 | return "device removed"; | |
cf7776dc HL |
210 | case -EXDEV: |
211 | return "partial isochronous transfer"; | |
212 | case -EINVAL: | |
213 | return "invalid argument"; | |
73a88814 TS |
214 | case -ECONNRESET: |
215 | return "unlinked (async)"; | |
cf7776dc | 216 | case -ESHUTDOWN: |
73a88814 | 217 | return "device shut down"; |
cf7776dc | 218 | default: |
73a88814 | 219 | snprintf(unkmsg, sizeof(unkmsg), "unknown status %d", status); |
cf7776dc HL |
220 | return unkmsg; |
221 | } | |
222 | } | |
223 | ||
224 | /* usb_pipetype_str | |
225 | * retrieve string representation of USB pipe type | |
226 | */ | |
227 | static inline char *usb_pipetype_str(int pipe) | |
228 | { | |
229 | if (usb_pipeisoc(pipe)) | |
230 | return "Isoc"; | |
231 | if (usb_pipeint(pipe)) | |
232 | return "Int"; | |
233 | if (usb_pipecontrol(pipe)) | |
234 | return "Ctrl"; | |
235 | if (usb_pipebulk(pipe)) | |
236 | return "Bulk"; | |
237 | return "?"; | |
238 | } | |
239 | ||
240 | /* dump_urb | |
241 | * write content of URB to syslog for debugging | |
242 | */ | |
243 | static inline void dump_urb(enum debuglevel level, const char *tag, | |
784d5858 | 244 | struct urb *urb) |
cf7776dc HL |
245 | { |
246 | #ifdef CONFIG_GIGASET_DEBUG | |
247 | int i; | |
784d5858 | 248 | gig_dbg(level, "%s urb(0x%08lx)->{", tag, (unsigned long) urb); |
cf7776dc | 249 | if (urb) { |
784d5858 TS |
250 | gig_dbg(level, |
251 | " dev=0x%08lx, pipe=%s:EP%d/DV%d:%s, " | |
252 | "status=%d, hcpriv=0x%08lx, transfer_flags=0x%x,", | |
253 | (unsigned long) urb->dev, | |
254 | usb_pipetype_str(urb->pipe), | |
255 | usb_pipeendpoint(urb->pipe), usb_pipedevice(urb->pipe), | |
256 | usb_pipein(urb->pipe) ? "in" : "out", | |
257 | urb->status, (unsigned long) urb->hcpriv, | |
258 | urb->transfer_flags); | |
259 | gig_dbg(level, | |
260 | " transfer_buffer=0x%08lx[%d], actual_length=%d, " | |
261 | "bandwidth=%d, setup_packet=0x%08lx,", | |
262 | (unsigned long) urb->transfer_buffer, | |
263 | urb->transfer_buffer_length, urb->actual_length, | |
264 | urb->bandwidth, (unsigned long) urb->setup_packet); | |
265 | gig_dbg(level, | |
266 | " start_frame=%d, number_of_packets=%d, interval=%d, " | |
267 | "error_count=%d,", | |
268 | urb->start_frame, urb->number_of_packets, urb->interval, | |
269 | urb->error_count); | |
270 | gig_dbg(level, | |
271 | " context=0x%08lx, complete=0x%08lx, " | |
272 | "iso_frame_desc[]={", | |
273 | (unsigned long) urb->context, | |
274 | (unsigned long) urb->complete); | |
cf7776dc | 275 | for (i = 0; i < urb->number_of_packets; i++) { |
917f5085 TS |
276 | struct usb_iso_packet_descriptor *pifd |
277 | = &urb->iso_frame_desc[i]; | |
784d5858 TS |
278 | gig_dbg(level, |
279 | " {offset=%u, length=%u, actual_length=%u, " | |
280 | "status=%u}", | |
281 | pifd->offset, pifd->length, pifd->actual_length, | |
282 | pifd->status); | |
cf7776dc HL |
283 | } |
284 | } | |
784d5858 | 285 | gig_dbg(level, "}}"); |
cf7776dc HL |
286 | #endif |
287 | } | |
288 | ||
289 | /* read/set modem control bits etc. (m10x only) */ | |
290 | static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state, | |
784d5858 | 291 | unsigned new_state) |
cf7776dc HL |
292 | { |
293 | return -EINVAL; | |
294 | } | |
295 | ||
296 | static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag) | |
297 | { | |
298 | return -EINVAL; | |
299 | } | |
300 | ||
301 | static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag) | |
302 | { | |
303 | return -EINVAL; | |
304 | } | |
305 | ||
306 | /* error_hangup | |
307 | * hang up any existing connection because of an unrecoverable error | |
308 | * This function may be called from any context and takes care of scheduling | |
309 | * the necessary actions for execution outside of interrupt context. | |
06163f86 | 310 | * cs->lock must not be held. |
cf7776dc HL |
311 | * argument: |
312 | * B channel control structure | |
313 | */ | |
314 | static inline void error_hangup(struct bc_state *bcs) | |
315 | { | |
316 | struct cardstate *cs = bcs->cs; | |
317 | ||
784d5858 TS |
318 | gig_dbg(DEBUG_ANY, "%s: scheduling HUP for channel %d", |
319 | __func__, bcs->channel); | |
cf7776dc | 320 | |
73a88814 TS |
321 | if (!gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL)) |
322 | dev_err(cs->dev, "event queue full\n"); | |
cf7776dc HL |
323 | |
324 | gigaset_schedule_event(cs); | |
325 | } | |
326 | ||
327 | /* error_reset | |
328 | * reset Gigaset device because of an unrecoverable error | |
06163f86 | 329 | * This function may be called from any context, and takes care of |
73a88814 | 330 | * scheduling the necessary actions for execution outside of interrupt context. |
06163f86 | 331 | * cs->lock must not be held. |
cf7776dc HL |
332 | * argument: |
333 | * controller state structure | |
334 | */ | |
335 | static inline void error_reset(struct cardstate *cs) | |
336 | { | |
06163f86 TS |
337 | /* close AT command channel to recover (ignore errors) */ |
338 | req_submit(cs->bcs, HD_CLOSE_ATCHANNEL, 0, BAS_TIMEOUT); | |
339 | ||
cf7776dc | 340 | //FIXME try to recover without bothering the user |
784d5858 TS |
341 | dev_err(cs->dev, |
342 | "unrecoverable error - please disconnect Gigaset base to reset\n"); | |
cf7776dc HL |
343 | } |
344 | ||
345 | /* check_pending | |
346 | * check for completion of pending control request | |
347 | * parameter: | |
784d5858 | 348 | * ucs hardware specific controller state structure |
cf7776dc HL |
349 | */ |
350 | static void check_pending(struct bas_cardstate *ucs) | |
351 | { | |
352 | unsigned long flags; | |
353 | ||
cf7776dc HL |
354 | spin_lock_irqsave(&ucs->lock, flags); |
355 | switch (ucs->pending) { | |
356 | case 0: | |
357 | break; | |
358 | case HD_OPEN_ATCHANNEL: | |
359 | if (atomic_read(&ucs->basstate) & BS_ATOPEN) | |
360 | ucs->pending = 0; | |
361 | break; | |
362 | case HD_OPEN_B1CHANNEL: | |
363 | if (atomic_read(&ucs->basstate) & BS_B1OPEN) | |
364 | ucs->pending = 0; | |
365 | break; | |
366 | case HD_OPEN_B2CHANNEL: | |
367 | if (atomic_read(&ucs->basstate) & BS_B2OPEN) | |
368 | ucs->pending = 0; | |
369 | break; | |
370 | case HD_CLOSE_ATCHANNEL: | |
371 | if (!(atomic_read(&ucs->basstate) & BS_ATOPEN)) | |
372 | ucs->pending = 0; | |
cf7776dc HL |
373 | break; |
374 | case HD_CLOSE_B1CHANNEL: | |
375 | if (!(atomic_read(&ucs->basstate) & BS_B1OPEN)) | |
376 | ucs->pending = 0; | |
377 | break; | |
378 | case HD_CLOSE_B2CHANNEL: | |
379 | if (!(atomic_read(&ucs->basstate) & BS_B2OPEN)) | |
380 | ucs->pending = 0; | |
381 | break; | |
382 | case HD_DEVICE_INIT_ACK: /* no reply expected */ | |
383 | ucs->pending = 0; | |
384 | break; | |
385 | /* HD_READ_ATMESSAGE, HD_WRITE_ATMESSAGE, HD_RESET_INTERRUPTPIPE | |
386 | * are handled separately and should never end up here | |
387 | */ | |
388 | default: | |
784d5858 TS |
389 | dev_warn(&ucs->interface->dev, |
390 | "unknown pending request 0x%02x cleared\n", | |
391 | ucs->pending); | |
cf7776dc HL |
392 | ucs->pending = 0; |
393 | } | |
394 | ||
395 | if (!ucs->pending) | |
396 | del_timer(&ucs->timer_ctrl); | |
397 | ||
398 | spin_unlock_irqrestore(&ucs->lock, flags); | |
399 | } | |
400 | ||
401 | /* cmd_in_timeout | |
402 | * timeout routine for command input request | |
403 | * argument: | |
404 | * controller state structure | |
405 | */ | |
406 | static void cmd_in_timeout(unsigned long data) | |
407 | { | |
408 | struct cardstate *cs = (struct cardstate *) data; | |
d48c7784 | 409 | struct bas_cardstate *ucs = cs->hw.bas; |
06163f86 | 410 | int rc; |
cf7776dc | 411 | |
cf7776dc | 412 | if (!ucs->rcvbuf_size) { |
784d5858 | 413 | gig_dbg(DEBUG_USBREQ, "%s: no receive in progress", __func__); |
cf7776dc HL |
414 | return; |
415 | } | |
cf7776dc | 416 | |
06163f86 TS |
417 | if (ucs->retry_cmd_in++ < BAS_RETRY) { |
418 | dev_notice(cs->dev, "control read: timeout, retry %d\n", | |
419 | ucs->retry_cmd_in); | |
420 | rc = atread_submit(cs, BAS_TIMEOUT); | |
421 | if (rc >= 0 || rc == -ENODEV) | |
422 | /* resubmitted or disconnected */ | |
423 | /* - bypass regular exit block */ | |
424 | return; | |
425 | } else { | |
426 | dev_err(cs->dev, | |
427 | "control read: timeout, giving up after %d tries\n", | |
428 | ucs->retry_cmd_in); | |
429 | } | |
430 | kfree(ucs->rcvbuf); | |
431 | ucs->rcvbuf = NULL; | |
432 | ucs->rcvbuf_size = 0; | |
433 | error_reset(cs); | |
cf7776dc HL |
434 | } |
435 | ||
73a88814 TS |
436 | /* set/clear bits in base connection state, return previous state |
437 | */ | |
438 | inline static int update_basstate(struct bas_cardstate *ucs, | |
439 | int set, int clear) | |
440 | { | |
441 | unsigned long flags; | |
442 | int state; | |
cf7776dc | 443 | |
73a88814 TS |
444 | spin_lock_irqsave(&ucs->lock, flags); |
445 | state = atomic_read(&ucs->basstate); | |
446 | atomic_set(&ucs->basstate, (state & ~clear) | set); | |
447 | spin_unlock_irqrestore(&ucs->lock, flags); | |
448 | return state; | |
449 | } | |
cf7776dc | 450 | |
06163f86 TS |
451 | /* read_ctrl_callback |
452 | * USB completion handler for control pipe input | |
453 | * called by the USB subsystem in interrupt context | |
454 | * parameter: | |
455 | * urb USB request block | |
456 | * urb->context = inbuf structure for controller state | |
457 | */ | |
458 | static void read_ctrl_callback(struct urb *urb, struct pt_regs *regs) | |
459 | { | |
460 | struct inbuf_t *inbuf = urb->context; | |
461 | struct cardstate *cs = inbuf->cs; | |
462 | struct bas_cardstate *ucs = cs->hw.bas; | |
463 | int have_data = 0; | |
464 | unsigned numbytes; | |
465 | int rc; | |
466 | ||
467 | update_basstate(ucs, 0, BS_ATRDPEND); | |
468 | ||
469 | if (!ucs->rcvbuf_size) { | |
470 | dev_warn(cs->dev, "%s: no receive in progress\n", __func__); | |
471 | return; | |
472 | } | |
473 | ||
474 | del_timer(&ucs->timer_cmd_in); | |
475 | ||
476 | switch (urb->status) { | |
477 | case 0: /* normal completion */ | |
478 | numbytes = urb->actual_length; | |
479 | if (unlikely(numbytes != ucs->rcvbuf_size)) { | |
480 | dev_warn(cs->dev, | |
481 | "control read: received %d chars, expected %d\n", | |
482 | numbytes, ucs->rcvbuf_size); | |
483 | if (numbytes > ucs->rcvbuf_size) | |
484 | numbytes = ucs->rcvbuf_size; | |
485 | } | |
486 | ||
487 | /* copy received bytes to inbuf */ | |
488 | have_data = gigaset_fill_inbuf(inbuf, ucs->rcvbuf, numbytes); | |
489 | ||
490 | if (unlikely(numbytes < ucs->rcvbuf_size)) { | |
491 | /* incomplete - resubmit for remaining bytes */ | |
492 | ucs->rcvbuf_size -= numbytes; | |
493 | ucs->retry_cmd_in = 0; | |
494 | rc = atread_submit(cs, BAS_TIMEOUT); | |
495 | if (rc >= 0 || rc == -ENODEV) | |
496 | /* resubmitted or disconnected */ | |
497 | /* - bypass regular exit block */ | |
498 | return; | |
499 | error_reset(cs); | |
500 | } | |
501 | break; | |
502 | ||
503 | case -ENOENT: /* cancelled */ | |
504 | case -ECONNRESET: /* cancelled (async) */ | |
505 | case -EINPROGRESS: /* pending */ | |
506 | case -ENODEV: /* device removed */ | |
507 | case -ESHUTDOWN: /* device shut down */ | |
508 | /* no action necessary */ | |
509 | gig_dbg(DEBUG_USBREQ, "%s: %s", | |
510 | __func__, get_usb_statmsg(urb->status)); | |
511 | break; | |
512 | ||
513 | default: /* severe trouble */ | |
514 | dev_warn(cs->dev, "control read: %s\n", | |
515 | get_usb_statmsg(urb->status)); | |
516 | if (ucs->retry_cmd_in++ < BAS_RETRY) { | |
517 | dev_notice(cs->dev, "control read: retry %d\n", | |
518 | ucs->retry_cmd_in); | |
519 | rc = atread_submit(cs, BAS_TIMEOUT); | |
520 | if (rc >= 0 || rc == -ENODEV) | |
521 | /* resubmitted or disconnected */ | |
522 | /* - bypass regular exit block */ | |
523 | return; | |
524 | } else { | |
525 | dev_err(cs->dev, | |
526 | "control read: giving up after %d tries\n", | |
527 | ucs->retry_cmd_in); | |
528 | } | |
529 | error_reset(cs); | |
530 | } | |
531 | ||
532 | kfree(ucs->rcvbuf); | |
533 | ucs->rcvbuf = NULL; | |
534 | ucs->rcvbuf_size = 0; | |
535 | if (have_data) { | |
536 | gig_dbg(DEBUG_INTR, "%s-->BH", __func__); | |
537 | gigaset_schedule_event(cs); | |
538 | } | |
539 | } | |
540 | ||
cf7776dc | 541 | /* atread_submit |
73a88814 | 542 | * submit an HD_READ_ATMESSAGE command URB and optionally start a timeout |
cf7776dc HL |
543 | * parameters: |
544 | * cs controller state structure | |
545 | * timeout timeout in 1/10 sec., 0: none | |
546 | * return value: | |
547 | * 0 on success | |
cf7776dc HL |
548 | * -EBUSY if another request is pending |
549 | * any URB submission error code | |
550 | */ | |
551 | static int atread_submit(struct cardstate *cs, int timeout) | |
552 | { | |
d48c7784 | 553 | struct bas_cardstate *ucs = cs->hw.bas; |
cf7776dc HL |
554 | int ret; |
555 | ||
784d5858 TS |
556 | gig_dbg(DEBUG_USBREQ, "-------> HD_READ_ATMESSAGE (%d)", |
557 | ucs->rcvbuf_size); | |
cf7776dc | 558 | |
73a88814 | 559 | if (update_basstate(ucs, BS_ATRDPEND, 0) & BS_ATRDPEND) { |
784d5858 TS |
560 | dev_err(cs->dev, |
561 | "could not submit HD_READ_ATMESSAGE: URB busy\n"); | |
cf7776dc HL |
562 | return -EBUSY; |
563 | } | |
564 | ||
565 | ucs->dr_cmd_in.bRequestType = IN_VENDOR_REQ; | |
566 | ucs->dr_cmd_in.bRequest = HD_READ_ATMESSAGE; | |
567 | ucs->dr_cmd_in.wValue = 0; | |
568 | ucs->dr_cmd_in.wIndex = 0; | |
569 | ucs->dr_cmd_in.wLength = cpu_to_le16(ucs->rcvbuf_size); | |
570 | usb_fill_control_urb(ucs->urb_cmd_in, ucs->udev, | |
784d5858 TS |
571 | usb_rcvctrlpipe(ucs->udev, 0), |
572 | (unsigned char*) & ucs->dr_cmd_in, | |
573 | ucs->rcvbuf, ucs->rcvbuf_size, | |
574 | read_ctrl_callback, cs->inbuf); | |
cf7776dc HL |
575 | |
576 | if ((ret = usb_submit_urb(ucs->urb_cmd_in, SLAB_ATOMIC)) != 0) { | |
73a88814 | 577 | update_basstate(ucs, 0, BS_ATRDPEND); |
784d5858 | 578 | dev_err(cs->dev, "could not submit HD_READ_ATMESSAGE: %s\n", |
06163f86 | 579 | get_usb_rcmsg(ret)); |
cf7776dc HL |
580 | return ret; |
581 | } | |
582 | ||
583 | if (timeout > 0) { | |
784d5858 | 584 | gig_dbg(DEBUG_USBREQ, "setting timeout of %d/10 secs", timeout); |
cf7776dc HL |
585 | ucs->timer_cmd_in.expires = jiffies + timeout * HZ / 10; |
586 | ucs->timer_cmd_in.data = (unsigned long) cs; | |
587 | ucs->timer_cmd_in.function = cmd_in_timeout; | |
588 | add_timer(&ucs->timer_cmd_in); | |
589 | } | |
590 | return 0; | |
591 | } | |
592 | ||
cf7776dc HL |
593 | /* read_int_callback |
594 | * USB completion handler for interrupt pipe input | |
595 | * called by the USB subsystem in interrupt context | |
596 | * parameter: | |
597 | * urb USB request block | |
598 | * urb->context = controller state structure | |
599 | */ | |
600 | static void read_int_callback(struct urb *urb, struct pt_regs *regs) | |
601 | { | |
d48c7784 TS |
602 | struct cardstate *cs = urb->context; |
603 | struct bas_cardstate *ucs = cs->hw.bas; | |
cf7776dc HL |
604 | struct bc_state *bcs; |
605 | unsigned long flags; | |
73a88814 | 606 | int rc; |
cf7776dc HL |
607 | unsigned l; |
608 | int channel; | |
609 | ||
cf7776dc HL |
610 | switch (urb->status) { |
611 | case 0: /* success */ | |
612 | break; | |
73a88814 TS |
613 | case -ENOENT: /* cancelled */ |
614 | case -ECONNRESET: /* cancelled (async) */ | |
cf7776dc HL |
615 | case -EINPROGRESS: /* pending */ |
616 | /* ignore silently */ | |
784d5858 TS |
617 | gig_dbg(DEBUG_USBREQ, "%s: %s", |
618 | __func__, get_usb_statmsg(urb->status)); | |
cf7776dc | 619 | return; |
73a88814 TS |
620 | case -ENODEV: /* device removed */ |
621 | case -ESHUTDOWN: /* device shut down */ | |
622 | //FIXME use this as disconnect indicator? | |
623 | gig_dbg(DEBUG_USBREQ, "%s: device disconnected", __func__); | |
624 | return; | |
cf7776dc | 625 | default: /* severe trouble */ |
784d5858 TS |
626 | dev_warn(cs->dev, "interrupt read: %s\n", |
627 | get_usb_statmsg(urb->status)); | |
cf7776dc HL |
628 | //FIXME corrective action? resubmission always ok? |
629 | goto resubmit; | |
630 | } | |
631 | ||
73a88814 TS |
632 | /* drop incomplete packets even if the missing bytes wouldn't matter */ |
633 | if (unlikely(urb->actual_length < 3)) { | |
634 | dev_warn(cs->dev, "incomplete interrupt packet (%d bytes)\n", | |
635 | urb->actual_length); | |
636 | goto resubmit; | |
637 | } | |
638 | ||
cf7776dc HL |
639 | l = (unsigned) ucs->int_in_buf[1] + |
640 | (((unsigned) ucs->int_in_buf[2]) << 8); | |
641 | ||
784d5858 TS |
642 | gig_dbg(DEBUG_USBREQ, "<-------%d: 0x%02x (%u [0x%02x 0x%02x])", |
643 | urb->actual_length, (int)ucs->int_in_buf[0], l, | |
644 | (int)ucs->int_in_buf[1], (int)ucs->int_in_buf[2]); | |
cf7776dc HL |
645 | |
646 | channel = 0; | |
647 | ||
648 | switch (ucs->int_in_buf[0]) { | |
649 | case HD_DEVICE_INIT_OK: | |
650 | update_basstate(ucs, BS_INIT, 0); | |
651 | break; | |
652 | ||
653 | case HD_READY_SEND_ATDATA: | |
654 | del_timer(&ucs->timer_atrdy); | |
655 | update_basstate(ucs, BS_ATREADY, BS_ATTIMER); | |
656 | start_cbsend(cs); | |
657 | break; | |
658 | ||
659 | case HD_OPEN_B2CHANNEL_ACK: | |
660 | ++channel; | |
661 | case HD_OPEN_B1CHANNEL_ACK: | |
662 | bcs = cs->bcs + channel; | |
663 | update_basstate(ucs, BS_B1OPEN << channel, 0); | |
664 | gigaset_bchannel_up(bcs); | |
665 | break; | |
666 | ||
667 | case HD_OPEN_ATCHANNEL_ACK: | |
668 | update_basstate(ucs, BS_ATOPEN, 0); | |
669 | start_cbsend(cs); | |
670 | break; | |
671 | ||
672 | case HD_CLOSE_B2CHANNEL_ACK: | |
673 | ++channel; | |
674 | case HD_CLOSE_B1CHANNEL_ACK: | |
675 | bcs = cs->bcs + channel; | |
676 | update_basstate(ucs, 0, BS_B1OPEN << channel); | |
677 | stopurbs(bcs->hw.bas); | |
678 | gigaset_bchannel_down(bcs); | |
679 | break; | |
680 | ||
681 | case HD_CLOSE_ATCHANNEL_ACK: | |
682 | update_basstate(ucs, 0, BS_ATOPEN); | |
683 | break; | |
684 | ||
685 | case HD_B2_FLOW_CONTROL: | |
686 | ++channel; | |
687 | case HD_B1_FLOW_CONTROL: | |
688 | bcs = cs->bcs + channel; | |
689 | atomic_add((l - BAS_NORMFRAME) * BAS_CORRFRAMES, | |
784d5858 TS |
690 | &bcs->hw.bas->corrbytes); |
691 | gig_dbg(DEBUG_ISO, | |
692 | "Flow control (channel %d, sub %d): 0x%02x => %d", | |
693 | channel, bcs->hw.bas->numsub, l, | |
694 | atomic_read(&bcs->hw.bas->corrbytes)); | |
cf7776dc HL |
695 | break; |
696 | ||
697 | case HD_RECEIVEATDATA_ACK: /* AT response ready to be received */ | |
698 | if (!l) { | |
784d5858 TS |
699 | dev_warn(cs->dev, |
700 | "HD_RECEIVEATDATA_ACK with length 0 ignored\n"); | |
cf7776dc HL |
701 | break; |
702 | } | |
703 | spin_lock_irqsave(&cs->lock, flags); | |
704 | if (ucs->rcvbuf_size) { | |
73a88814 | 705 | /* throw away previous buffer - we have no queue */ |
784d5858 | 706 | dev_err(cs->dev, |
73a88814 TS |
707 | "receive AT data overrun, %d bytes lost\n", |
708 | ucs->rcvbuf_size); | |
709 | kfree(ucs->rcvbuf); | |
710 | ucs->rcvbuf_size = 0; | |
cf7776dc HL |
711 | } |
712 | if ((ucs->rcvbuf = kmalloc(l, GFP_ATOMIC)) == NULL) { | |
713 | spin_unlock_irqrestore(&cs->lock, flags); | |
73a88814 TS |
714 | dev_err(cs->dev, "out of memory receiving AT data\n"); |
715 | error_reset(cs); | |
cf7776dc HL |
716 | break; |
717 | } | |
718 | ucs->rcvbuf_size = l; | |
719 | ucs->retry_cmd_in = 0; | |
73a88814 | 720 | if ((rc = atread_submit(cs, BAS_TIMEOUT)) < 0) { |
cf7776dc HL |
721 | kfree(ucs->rcvbuf); |
722 | ucs->rcvbuf = NULL; | |
723 | ucs->rcvbuf_size = 0; | |
06163f86 | 724 | if (rc != -ENODEV) { |
73a88814 | 725 | //FIXME corrective action? |
06163f86 | 726 | spin_unlock_irqrestore(&cs->lock, flags); |
73a88814 | 727 | error_reset(cs); |
06163f86 TS |
728 | break; |
729 | } | |
cf7776dc HL |
730 | } |
731 | spin_unlock_irqrestore(&cs->lock, flags); | |
732 | break; | |
733 | ||
734 | case HD_RESET_INTERRUPT_PIPE_ACK: | |
784d5858 | 735 | gig_dbg(DEBUG_USBREQ, "HD_RESET_INTERRUPT_PIPE_ACK"); |
cf7776dc HL |
736 | break; |
737 | ||
738 | case HD_SUSPEND_END: | |
784d5858 | 739 | gig_dbg(DEBUG_USBREQ, "HD_SUSPEND_END"); |
cf7776dc HL |
740 | break; |
741 | ||
742 | default: | |
784d5858 TS |
743 | dev_warn(cs->dev, |
744 | "unknown Gigaset signal 0x%02x (%u) ignored\n", | |
745 | (int) ucs->int_in_buf[0], l); | |
cf7776dc HL |
746 | } |
747 | ||
748 | check_pending(ucs); | |
749 | ||
750 | resubmit: | |
73a88814 TS |
751 | rc = usb_submit_urb(urb, SLAB_ATOMIC); |
752 | if (unlikely(rc != 0 && rc != -ENODEV)) { | |
784d5858 | 753 | dev_err(cs->dev, "could not resubmit interrupt URB: %s\n", |
73a88814 | 754 | get_usb_rcmsg(rc)); |
cf7776dc HL |
755 | error_reset(cs); |
756 | } | |
757 | } | |
758 | ||
cf7776dc HL |
759 | /* read_iso_callback |
760 | * USB completion handler for B channel isochronous input | |
761 | * called by the USB subsystem in interrupt context | |
762 | * parameter: | |
763 | * urb USB request block of completed request | |
764 | * urb->context = bc_state structure | |
765 | */ | |
766 | static void read_iso_callback(struct urb *urb, struct pt_regs *regs) | |
767 | { | |
768 | struct bc_state *bcs; | |
769 | struct bas_bc_state *ubc; | |
770 | unsigned long flags; | |
771 | int i, rc; | |
772 | ||
cf7776dc | 773 | /* status codes not worth bothering the tasklet with */ |
73a88814 TS |
774 | if (unlikely(urb->status == -ENOENT || |
775 | urb->status == -ECONNRESET || | |
776 | urb->status == -EINPROGRESS || | |
777 | urb->status == -ENODEV || | |
778 | urb->status == -ESHUTDOWN)) { | |
784d5858 TS |
779 | gig_dbg(DEBUG_ISO, "%s: %s", |
780 | __func__, get_usb_statmsg(urb->status)); | |
cf7776dc HL |
781 | return; |
782 | } | |
783 | ||
d48c7784 | 784 | bcs = urb->context; |
cf7776dc | 785 | ubc = bcs->hw.bas; |
cf7776dc HL |
786 | |
787 | spin_lock_irqsave(&ubc->isoinlock, flags); | |
788 | if (likely(ubc->isoindone == NULL)) { | |
789 | /* pass URB to tasklet */ | |
790 | ubc->isoindone = urb; | |
791 | tasklet_schedule(&ubc->rcvd_tasklet); | |
792 | } else { | |
793 | /* tasklet still busy, drop data and resubmit URB */ | |
794 | ubc->loststatus = urb->status; | |
795 | for (i = 0; i < BAS_NUMFRAMES; i++) { | |
796 | ubc->isoinlost += urb->iso_frame_desc[i].actual_length; | |
797 | if (unlikely(urb->iso_frame_desc[i].status != 0 && | |
73a88814 TS |
798 | urb->iso_frame_desc[i].status != |
799 | -EINPROGRESS)) | |
cf7776dc | 800 | ubc->loststatus = urb->iso_frame_desc[i].status; |
cf7776dc HL |
801 | urb->iso_frame_desc[i].status = 0; |
802 | urb->iso_frame_desc[i].actual_length = 0; | |
803 | } | |
804 | if (likely(atomic_read(&ubc->running))) { | |
784d5858 TS |
805 | /* urb->dev is clobbered by USB subsystem */ |
806 | urb->dev = bcs->cs->hw.bas->udev; | |
cf7776dc HL |
807 | urb->transfer_flags = URB_ISO_ASAP; |
808 | urb->number_of_packets = BAS_NUMFRAMES; | |
784d5858 TS |
809 | gig_dbg(DEBUG_ISO, "%s: isoc read overrun/resubmit", |
810 | __func__); | |
cf7776dc | 811 | rc = usb_submit_urb(urb, SLAB_ATOMIC); |
73a88814 | 812 | if (unlikely(rc != 0 && rc != -ENODEV)) { |
784d5858 TS |
813 | dev_err(bcs->cs->dev, |
814 | "could not resubmit isochronous read " | |
73a88814 | 815 | "URB: %s\n", get_usb_rcmsg(rc)); |
cf7776dc HL |
816 | dump_urb(DEBUG_ISO, "isoc read", urb); |
817 | error_hangup(bcs); | |
818 | } | |
819 | } | |
820 | } | |
821 | spin_unlock_irqrestore(&ubc->isoinlock, flags); | |
822 | } | |
823 | ||
824 | /* write_iso_callback | |
825 | * USB completion handler for B channel isochronous output | |
826 | * called by the USB subsystem in interrupt context | |
827 | * parameter: | |
828 | * urb USB request block of completed request | |
829 | * urb->context = isow_urbctx_t structure | |
830 | */ | |
831 | static void write_iso_callback(struct urb *urb, struct pt_regs *regs) | |
832 | { | |
833 | struct isow_urbctx_t *ucx; | |
834 | struct bas_bc_state *ubc; | |
835 | unsigned long flags; | |
836 | ||
cf7776dc | 837 | /* status codes not worth bothering the tasklet with */ |
73a88814 TS |
838 | if (unlikely(urb->status == -ENOENT || |
839 | urb->status == -ECONNRESET || | |
840 | urb->status == -EINPROGRESS || | |
841 | urb->status == -ENODEV || | |
842 | urb->status == -ESHUTDOWN)) { | |
784d5858 TS |
843 | gig_dbg(DEBUG_ISO, "%s: %s", |
844 | __func__, get_usb_statmsg(urb->status)); | |
cf7776dc HL |
845 | return; |
846 | } | |
847 | ||
848 | /* pass URB context to tasklet */ | |
d48c7784 | 849 | ucx = urb->context; |
cf7776dc | 850 | ubc = ucx->bcs->hw.bas; |
cf7776dc HL |
851 | |
852 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
853 | ubc->isooutovfl = ubc->isooutdone; | |
854 | ubc->isooutdone = ucx; | |
855 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
856 | tasklet_schedule(&ubc->sent_tasklet); | |
857 | } | |
858 | ||
859 | /* starturbs | |
860 | * prepare and submit USB request blocks for isochronous input and output | |
861 | * argument: | |
862 | * B channel control structure | |
863 | * return value: | |
864 | * 0 on success | |
865 | * < 0 on error (no URBs submitted) | |
866 | */ | |
867 | static int starturbs(struct bc_state *bcs) | |
868 | { | |
d48c7784 | 869 | struct bas_bc_state *ubc = bcs->hw.bas; |
cf7776dc | 870 | struct urb *urb; |
cf7776dc HL |
871 | int j, k; |
872 | int rc; | |
873 | ||
cf7776dc HL |
874 | /* initialize L2 reception */ |
875 | if (bcs->proto2 == ISDN_PROTO_L2_HDLC) | |
876 | bcs->inputstate |= INS_flag_hunt; | |
877 | ||
878 | /* submit all isochronous input URBs */ | |
879 | atomic_set(&ubc->running, 1); | |
880 | for (k = 0; k < BAS_INURBS; k++) { | |
881 | urb = ubc->isoinurbs[k]; | |
882 | if (!urb) { | |
cf7776dc HL |
883 | rc = -EFAULT; |
884 | goto error; | |
885 | } | |
886 | ||
887 | urb->dev = bcs->cs->hw.bas->udev; | |
888 | urb->pipe = usb_rcvisocpipe(urb->dev, 3 + 2 * bcs->channel); | |
889 | urb->transfer_flags = URB_ISO_ASAP; | |
890 | urb->transfer_buffer = ubc->isoinbuf + k * BAS_INBUFSIZE; | |
891 | urb->transfer_buffer_length = BAS_INBUFSIZE; | |
892 | urb->number_of_packets = BAS_NUMFRAMES; | |
893 | urb->interval = BAS_FRAMETIME; | |
894 | urb->complete = read_iso_callback; | |
895 | urb->context = bcs; | |
896 | for (j = 0; j < BAS_NUMFRAMES; j++) { | |
897 | urb->iso_frame_desc[j].offset = j * BAS_MAXFRAME; | |
898 | urb->iso_frame_desc[j].length = BAS_MAXFRAME; | |
899 | urb->iso_frame_desc[j].status = 0; | |
900 | urb->iso_frame_desc[j].actual_length = 0; | |
901 | } | |
902 | ||
903 | dump_urb(DEBUG_ISO, "Initial isoc read", urb); | |
73a88814 | 904 | if ((rc = usb_submit_urb(urb, SLAB_ATOMIC)) != 0) |
cf7776dc | 905 | goto error; |
cf7776dc HL |
906 | } |
907 | ||
908 | /* initialize L2 transmission */ | |
909 | gigaset_isowbuf_init(ubc->isooutbuf, PPP_FLAG); | |
910 | ||
911 | /* set up isochronous output URBs for flag idling */ | |
912 | for (k = 0; k < BAS_OUTURBS; ++k) { | |
913 | urb = ubc->isoouturbs[k].urb; | |
914 | if (!urb) { | |
cf7776dc HL |
915 | rc = -EFAULT; |
916 | goto error; | |
917 | } | |
918 | urb->dev = bcs->cs->hw.bas->udev; | |
919 | urb->pipe = usb_sndisocpipe(urb->dev, 4 + 2 * bcs->channel); | |
920 | urb->transfer_flags = URB_ISO_ASAP; | |
921 | urb->transfer_buffer = ubc->isooutbuf->data; | |
922 | urb->transfer_buffer_length = sizeof(ubc->isooutbuf->data); | |
923 | urb->number_of_packets = BAS_NUMFRAMES; | |
924 | urb->interval = BAS_FRAMETIME; | |
925 | urb->complete = write_iso_callback; | |
926 | urb->context = &ubc->isoouturbs[k]; | |
927 | for (j = 0; j < BAS_NUMFRAMES; ++j) { | |
928 | urb->iso_frame_desc[j].offset = BAS_OUTBUFSIZE; | |
929 | urb->iso_frame_desc[j].length = BAS_NORMFRAME; | |
930 | urb->iso_frame_desc[j].status = 0; | |
931 | urb->iso_frame_desc[j].actual_length = 0; | |
932 | } | |
933 | ubc->isoouturbs[k].limit = -1; | |
934 | } | |
935 | ||
936 | /* submit two URBs, keep third one */ | |
937 | for (k = 0; k < 2; ++k) { | |
938 | dump_urb(DEBUG_ISO, "Initial isoc write", urb); | |
939 | rc = usb_submit_urb(ubc->isoouturbs[k].urb, SLAB_ATOMIC); | |
73a88814 | 940 | if (rc != 0) |
cf7776dc | 941 | goto error; |
cf7776dc HL |
942 | } |
943 | dump_urb(DEBUG_ISO, "Initial isoc write (free)", urb); | |
944 | ubc->isooutfree = &ubc->isoouturbs[2]; | |
945 | ubc->isooutdone = ubc->isooutovfl = NULL; | |
946 | return 0; | |
947 | error: | |
948 | stopurbs(ubc); | |
949 | return rc; | |
950 | } | |
951 | ||
952 | /* stopurbs | |
953 | * cancel the USB request blocks for isochronous input and output | |
954 | * errors are silently ignored | |
955 | * argument: | |
956 | * B channel control structure | |
957 | */ | |
958 | static void stopurbs(struct bas_bc_state *ubc) | |
959 | { | |
960 | int k, rc; | |
961 | ||
cf7776dc HL |
962 | atomic_set(&ubc->running, 0); |
963 | ||
964 | for (k = 0; k < BAS_INURBS; ++k) { | |
965 | rc = usb_unlink_urb(ubc->isoinurbs[k]); | |
784d5858 | 966 | gig_dbg(DEBUG_ISO, |
73a88814 TS |
967 | "%s: isoc input URB %d unlinked, result = %s", |
968 | __func__, k, get_usb_rcmsg(rc)); | |
cf7776dc HL |
969 | } |
970 | ||
971 | for (k = 0; k < BAS_OUTURBS; ++k) { | |
972 | rc = usb_unlink_urb(ubc->isoouturbs[k].urb); | |
784d5858 | 973 | gig_dbg(DEBUG_ISO, |
73a88814 TS |
974 | "%s: isoc output URB %d unlinked, result = %s", |
975 | __func__, k, get_usb_rcmsg(rc)); | |
cf7776dc HL |
976 | } |
977 | } | |
978 | ||
979 | /* Isochronous Write - Bottom Half */ | |
980 | /* =============================== */ | |
981 | ||
982 | /* submit_iso_write_urb | |
983 | * fill and submit the next isochronous write URB | |
984 | * parameters: | |
73a88814 | 985 | * ucx context structure containing URB |
cf7776dc HL |
986 | * return value: |
987 | * number of frames submitted in URB | |
988 | * 0 if URB not submitted because no data available (isooutbuf busy) | |
989 | * error code < 0 on error | |
990 | */ | |
991 | static int submit_iso_write_urb(struct isow_urbctx_t *ucx) | |
992 | { | |
d48c7784 TS |
993 | struct urb *urb = ucx->urb; |
994 | struct bas_bc_state *ubc = ucx->bcs->hw.bas; | |
cf7776dc HL |
995 | struct usb_iso_packet_descriptor *ifd; |
996 | int corrbytes, nframe, rc; | |
997 | ||
784d5858 TS |
998 | /* urb->dev is clobbered by USB subsystem */ |
999 | urb->dev = ucx->bcs->cs->hw.bas->udev; | |
cf7776dc HL |
1000 | urb->transfer_flags = URB_ISO_ASAP; |
1001 | urb->transfer_buffer = ubc->isooutbuf->data; | |
1002 | urb->transfer_buffer_length = sizeof(ubc->isooutbuf->data); | |
1003 | ||
1004 | for (nframe = 0; nframe < BAS_NUMFRAMES; nframe++) { | |
1005 | ifd = &urb->iso_frame_desc[nframe]; | |
1006 | ||
1007 | /* compute frame length according to flow control */ | |
1008 | ifd->length = BAS_NORMFRAME; | |
1009 | if ((corrbytes = atomic_read(&ubc->corrbytes)) != 0) { | |
784d5858 TS |
1010 | gig_dbg(DEBUG_ISO, "%s: corrbytes=%d", |
1011 | __func__, corrbytes); | |
cf7776dc HL |
1012 | if (corrbytes > BAS_HIGHFRAME - BAS_NORMFRAME) |
1013 | corrbytes = BAS_HIGHFRAME - BAS_NORMFRAME; | |
1014 | else if (corrbytes < BAS_LOWFRAME - BAS_NORMFRAME) | |
1015 | corrbytes = BAS_LOWFRAME - BAS_NORMFRAME; | |
1016 | ifd->length += corrbytes; | |
1017 | atomic_add(-corrbytes, &ubc->corrbytes); | |
1018 | } | |
cf7776dc HL |
1019 | |
1020 | /* retrieve block of data to send */ | |
917f5085 TS |
1021 | ifd->offset = gigaset_isowbuf_getbytes(ubc->isooutbuf, |
1022 | ifd->length); | |
cf7776dc HL |
1023 | if (ifd->offset < 0) { |
1024 | if (ifd->offset == -EBUSY) { | |
784d5858 TS |
1025 | gig_dbg(DEBUG_ISO, |
1026 | "%s: buffer busy at frame %d", | |
1027 | __func__, nframe); | |
1028 | /* tasklet will be restarted from | |
1029 | gigaset_send_skb() */ | |
cf7776dc | 1030 | } else { |
784d5858 TS |
1031 | dev_err(ucx->bcs->cs->dev, |
1032 | "%s: buffer error %d at frame %d\n", | |
1033 | __func__, ifd->offset, nframe); | |
cf7776dc HL |
1034 | return ifd->offset; |
1035 | } | |
1036 | break; | |
1037 | } | |
1038 | ucx->limit = atomic_read(&ubc->isooutbuf->nextread); | |
1039 | ifd->status = 0; | |
1040 | ifd->actual_length = 0; | |
1041 | } | |
73a88814 TS |
1042 | if (unlikely(nframe == 0)) |
1043 | return 0; /* no data to send */ | |
1044 | urb->number_of_packets = nframe; | |
69049cc8 | 1045 | |
73a88814 TS |
1046 | rc = usb_submit_urb(urb, SLAB_ATOMIC); |
1047 | if (unlikely(rc)) { | |
1048 | if (rc == -ENODEV) | |
1049 | /* device removed - give up silently */ | |
1050 | gig_dbg(DEBUG_ISO, "%s: disconnected", __func__); | |
1051 | else | |
784d5858 TS |
1052 | dev_err(ucx->bcs->cs->dev, |
1053 | "could not submit isochronous write URB: %s\n", | |
73a88814 TS |
1054 | get_usb_rcmsg(rc)); |
1055 | return rc; | |
cf7776dc | 1056 | } |
73a88814 | 1057 | ++ubc->numsub; |
cf7776dc HL |
1058 | return nframe; |
1059 | } | |
1060 | ||
1061 | /* write_iso_tasklet | |
1062 | * tasklet scheduled when an isochronous output URB from the Gigaset device | |
1063 | * has completed | |
1064 | * parameter: | |
1065 | * data B channel state structure | |
1066 | */ | |
1067 | static void write_iso_tasklet(unsigned long data) | |
1068 | { | |
d48c7784 TS |
1069 | struct bc_state *bcs = (struct bc_state *) data; |
1070 | struct bas_bc_state *ubc = bcs->hw.bas; | |
1071 | struct cardstate *cs = bcs->cs; | |
cf7776dc HL |
1072 | struct isow_urbctx_t *done, *next, *ovfl; |
1073 | struct urb *urb; | |
1074 | struct usb_iso_packet_descriptor *ifd; | |
1075 | int offset; | |
1076 | unsigned long flags; | |
1077 | int i; | |
1078 | struct sk_buff *skb; | |
1079 | int len; | |
73a88814 | 1080 | int rc; |
cf7776dc | 1081 | |
cf7776dc HL |
1082 | /* loop while completed URBs arrive in time */ |
1083 | for (;;) { | |
cf7776dc | 1084 | if (unlikely(!(atomic_read(&ubc->running)))) { |
784d5858 | 1085 | gig_dbg(DEBUG_ISO, "%s: not running", __func__); |
cf7776dc HL |
1086 | return; |
1087 | } | |
1088 | ||
1089 | /* retrieve completed URBs */ | |
1090 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
1091 | done = ubc->isooutdone; | |
1092 | ubc->isooutdone = NULL; | |
1093 | ovfl = ubc->isooutovfl; | |
1094 | ubc->isooutovfl = NULL; | |
1095 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
1096 | if (ovfl) { | |
784d5858 | 1097 | dev_err(cs->dev, "isochronous write buffer underrun\n"); |
cf7776dc HL |
1098 | error_hangup(bcs); |
1099 | break; | |
1100 | } | |
1101 | if (!done) | |
1102 | break; | |
1103 | ||
1104 | /* submit free URB if available */ | |
1105 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
1106 | next = ubc->isooutfree; | |
1107 | ubc->isooutfree = NULL; | |
1108 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
1109 | if (next) { | |
73a88814 TS |
1110 | rc = submit_iso_write_urb(next); |
1111 | if (unlikely(rc <= 0 && rc != -ENODEV)) { | |
cf7776dc HL |
1112 | /* could not submit URB, put it back */ |
1113 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
1114 | if (ubc->isooutfree == NULL) { | |
1115 | ubc->isooutfree = next; | |
1116 | next = NULL; | |
1117 | } | |
1118 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
1119 | if (next) { | |
1120 | /* couldn't put it back */ | |
784d5858 TS |
1121 | dev_err(cs->dev, |
1122 | "losing isochronous write URB\n"); | |
cf7776dc HL |
1123 | error_hangup(bcs); |
1124 | } | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | /* process completed URB */ | |
1129 | urb = done->urb; | |
1130 | switch (urb->status) { | |
73a88814 TS |
1131 | case -EXDEV: /* partial completion */ |
1132 | gig_dbg(DEBUG_ISO, "%s: URB partially completed", | |
1133 | __func__); | |
1134 | /* fall through - what's the difference anyway? */ | |
cf7776dc | 1135 | case 0: /* normal completion */ |
73a88814 TS |
1136 | /* inspect individual frames |
1137 | * assumptions (for lack of documentation): | |
1138 | * - actual_length bytes of first frame in error are | |
917f5085 | 1139 | * successfully sent |
cf7776dc HL |
1140 | * - all following frames are not sent at all |
1141 | */ | |
73a88814 | 1142 | offset = done->limit; /* default (no error) */ |
cf7776dc HL |
1143 | for (i = 0; i < BAS_NUMFRAMES; i++) { |
1144 | ifd = &urb->iso_frame_desc[i]; | |
1145 | if (ifd->status || | |
1146 | ifd->actual_length != ifd->length) { | |
784d5858 TS |
1147 | dev_warn(cs->dev, |
1148 | "isochronous write: frame %d: %s, " | |
1149 | "only %d of %d bytes sent\n", | |
cf7776dc HL |
1150 | i, get_usb_statmsg(ifd->status), |
1151 | ifd->actual_length, ifd->length); | |
1152 | offset = (ifd->offset + | |
784d5858 TS |
1153 | ifd->actual_length) |
1154 | % BAS_OUTBUFSIZE; | |
cf7776dc HL |
1155 | break; |
1156 | } | |
1157 | } | |
1158 | #ifdef CONFIG_GIGASET_DEBUG | |
1159 | /* check assumption on remaining frames */ | |
1160 | for (; i < BAS_NUMFRAMES; i++) { | |
1161 | ifd = &urb->iso_frame_desc[i]; | |
1162 | if (ifd->status != -EINPROGRESS | |
1163 | || ifd->actual_length != 0) { | |
784d5858 TS |
1164 | dev_warn(cs->dev, |
1165 | "isochronous write: frame %d: %s, " | |
1166 | "%d of %d bytes sent\n", | |
cf7776dc HL |
1167 | i, get_usb_statmsg(ifd->status), |
1168 | ifd->actual_length, ifd->length); | |
1169 | offset = (ifd->offset + | |
784d5858 TS |
1170 | ifd->actual_length) |
1171 | % BAS_OUTBUFSIZE; | |
cf7776dc HL |
1172 | break; |
1173 | } | |
1174 | } | |
1175 | #endif | |
1176 | break; | |
73a88814 | 1177 | case -EPIPE: /* stall - probably underrun */ |
784d5858 | 1178 | dev_err(cs->dev, "isochronous write stalled\n"); |
cf7776dc HL |
1179 | error_hangup(bcs); |
1180 | break; | |
1181 | default: /* severe trouble */ | |
784d5858 TS |
1182 | dev_warn(cs->dev, "isochronous write: %s\n", |
1183 | get_usb_statmsg(urb->status)); | |
cf7776dc HL |
1184 | } |
1185 | ||
1186 | /* mark the write buffer area covered by this URB as free */ | |
1187 | if (done->limit >= 0) | |
1188 | atomic_set(&ubc->isooutbuf->read, done->limit); | |
1189 | ||
1190 | /* mark URB as free */ | |
1191 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
1192 | next = ubc->isooutfree; | |
1193 | ubc->isooutfree = done; | |
1194 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
1195 | if (next) { | |
1196 | /* only one URB still active - resubmit one */ | |
73a88814 TS |
1197 | rc = submit_iso_write_urb(next); |
1198 | if (unlikely(rc <= 0 && rc != -ENODEV)) { | |
cf7776dc HL |
1199 | /* couldn't submit */ |
1200 | error_hangup(bcs); | |
1201 | } | |
1202 | } | |
1203 | } | |
1204 | ||
1205 | /* process queued SKBs */ | |
1206 | while ((skb = skb_dequeue(&bcs->squeue))) { | |
1207 | /* copy to output buffer, doing L2 encapsulation */ | |
1208 | len = skb->len; | |
1209 | if (gigaset_isoc_buildframe(bcs, skb->data, len) == -EAGAIN) { | |
1210 | /* insufficient buffer space, push back onto queue */ | |
1211 | skb_queue_head(&bcs->squeue, skb); | |
784d5858 TS |
1212 | gig_dbg(DEBUG_ISO, "%s: skb requeued, qlen=%d", |
1213 | __func__, skb_queue_len(&bcs->squeue)); | |
cf7776dc HL |
1214 | break; |
1215 | } | |
1216 | skb_pull(skb, len); | |
1217 | gigaset_skb_sent(bcs, skb); | |
1218 | dev_kfree_skb_any(skb); | |
1219 | } | |
1220 | } | |
1221 | ||
1222 | /* Isochronous Read - Bottom Half */ | |
1223 | /* ============================== */ | |
1224 | ||
1225 | /* read_iso_tasklet | |
1226 | * tasklet scheduled when an isochronous input URB from the Gigaset device | |
1227 | * has completed | |
1228 | * parameter: | |
1229 | * data B channel state structure | |
1230 | */ | |
1231 | static void read_iso_tasklet(unsigned long data) | |
1232 | { | |
d48c7784 TS |
1233 | struct bc_state *bcs = (struct bc_state *) data; |
1234 | struct bas_bc_state *ubc = bcs->hw.bas; | |
1235 | struct cardstate *cs = bcs->cs; | |
cf7776dc HL |
1236 | struct urb *urb; |
1237 | char *rcvbuf; | |
1238 | unsigned long flags; | |
1239 | int totleft, numbytes, offset, frame, rc; | |
1240 | ||
cf7776dc HL |
1241 | /* loop while more completed URBs arrive in the meantime */ |
1242 | for (;;) { | |
cf7776dc HL |
1243 | /* retrieve URB */ |
1244 | spin_lock_irqsave(&ubc->isoinlock, flags); | |
1245 | if (!(urb = ubc->isoindone)) { | |
1246 | spin_unlock_irqrestore(&ubc->isoinlock, flags); | |
1247 | return; | |
1248 | } | |
1249 | ubc->isoindone = NULL; | |
1250 | if (unlikely(ubc->loststatus != -EINPROGRESS)) { | |
784d5858 TS |
1251 | dev_warn(cs->dev, |
1252 | "isochronous read overrun, " | |
1253 | "dropped URB with status: %s, %d bytes lost\n", | |
1254 | get_usb_statmsg(ubc->loststatus), | |
1255 | ubc->isoinlost); | |
cf7776dc HL |
1256 | ubc->loststatus = -EINPROGRESS; |
1257 | } | |
1258 | spin_unlock_irqrestore(&ubc->isoinlock, flags); | |
1259 | ||
1260 | if (unlikely(!(atomic_read(&ubc->running)))) { | |
784d5858 TS |
1261 | gig_dbg(DEBUG_ISO, |
1262 | "%s: channel not running, " | |
1263 | "dropped URB with status: %s", | |
1264 | __func__, get_usb_statmsg(urb->status)); | |
cf7776dc HL |
1265 | return; |
1266 | } | |
1267 | ||
1268 | switch (urb->status) { | |
1269 | case 0: /* normal completion */ | |
1270 | break; | |
917f5085 TS |
1271 | case -EXDEV: /* inspect individual frames |
1272 | (we do that anyway) */ | |
784d5858 TS |
1273 | gig_dbg(DEBUG_ISO, "%s: URB partially completed", |
1274 | __func__); | |
cf7776dc HL |
1275 | break; |
1276 | case -ENOENT: | |
1277 | case -ECONNRESET: | |
73a88814 TS |
1278 | case -EINPROGRESS: |
1279 | gig_dbg(DEBUG_ISO, "%s: %s", | |
1280 | __func__, get_usb_statmsg(urb->status)); | |
cf7776dc HL |
1281 | continue; /* -> skip */ |
1282 | case -EPIPE: | |
784d5858 | 1283 | dev_err(cs->dev, "isochronous read stalled\n"); |
cf7776dc HL |
1284 | error_hangup(bcs); |
1285 | continue; /* -> skip */ | |
1286 | default: /* severe trouble */ | |
784d5858 TS |
1287 | dev_warn(cs->dev, "isochronous read: %s\n", |
1288 | get_usb_statmsg(urb->status)); | |
cf7776dc HL |
1289 | goto error; |
1290 | } | |
1291 | ||
1292 | rcvbuf = urb->transfer_buffer; | |
1293 | totleft = urb->actual_length; | |
1294 | for (frame = 0; totleft > 0 && frame < BAS_NUMFRAMES; frame++) { | |
1295 | if (unlikely(urb->iso_frame_desc[frame].status)) { | |
784d5858 TS |
1296 | dev_warn(cs->dev, |
1297 | "isochronous read: frame %d: %s\n", | |
1298 | frame, | |
1299 | get_usb_statmsg( | |
1300 | urb->iso_frame_desc[frame].status)); | |
cf7776dc HL |
1301 | break; |
1302 | } | |
1303 | numbytes = urb->iso_frame_desc[frame].actual_length; | |
1304 | if (unlikely(numbytes > BAS_MAXFRAME)) { | |
784d5858 TS |
1305 | dev_warn(cs->dev, |
1306 | "isochronous read: frame %d: " | |
1307 | "numbytes (%d) > BAS_MAXFRAME\n", | |
1308 | frame, numbytes); | |
cf7776dc HL |
1309 | break; |
1310 | } | |
1311 | if (unlikely(numbytes > totleft)) { | |
784d5858 TS |
1312 | dev_warn(cs->dev, |
1313 | "isochronous read: frame %d: " | |
1314 | "numbytes (%d) > totleft (%d)\n", | |
1315 | frame, numbytes, totleft); | |
cf7776dc HL |
1316 | break; |
1317 | } | |
1318 | offset = urb->iso_frame_desc[frame].offset; | |
1319 | if (unlikely(offset + numbytes > BAS_INBUFSIZE)) { | |
784d5858 TS |
1320 | dev_warn(cs->dev, |
1321 | "isochronous read: frame %d: " | |
1322 | "offset (%d) + numbytes (%d) " | |
1323 | "> BAS_INBUFSIZE\n", | |
1324 | frame, offset, numbytes); | |
cf7776dc HL |
1325 | break; |
1326 | } | |
1327 | gigaset_isoc_receive(rcvbuf + offset, numbytes, bcs); | |
1328 | totleft -= numbytes; | |
1329 | } | |
1330 | if (unlikely(totleft > 0)) | |
784d5858 TS |
1331 | dev_warn(cs->dev, |
1332 | "isochronous read: %d data bytes missing\n", | |
1333 | totleft); | |
cf7776dc HL |
1334 | |
1335 | error: | |
1336 | /* URB processed, resubmit */ | |
1337 | for (frame = 0; frame < BAS_NUMFRAMES; frame++) { | |
1338 | urb->iso_frame_desc[frame].status = 0; | |
1339 | urb->iso_frame_desc[frame].actual_length = 0; | |
1340 | } | |
784d5858 TS |
1341 | /* urb->dev is clobbered by USB subsystem */ |
1342 | urb->dev = bcs->cs->hw.bas->udev; | |
cf7776dc HL |
1343 | urb->transfer_flags = URB_ISO_ASAP; |
1344 | urb->number_of_packets = BAS_NUMFRAMES; | |
73a88814 TS |
1345 | rc = usb_submit_urb(urb, SLAB_ATOMIC); |
1346 | if (unlikely(rc != 0 && rc != -ENODEV)) { | |
784d5858 TS |
1347 | dev_err(cs->dev, |
1348 | "could not resubmit isochronous read URB: %s\n", | |
73a88814 | 1349 | get_usb_rcmsg(rc)); |
cf7776dc HL |
1350 | dump_urb(DEBUG_ISO, "resubmit iso read", urb); |
1351 | error_hangup(bcs); | |
1352 | } | |
1353 | } | |
1354 | } | |
1355 | ||
1356 | /* Channel Operations */ | |
1357 | /* ================== */ | |
1358 | ||
1359 | /* req_timeout | |
1360 | * timeout routine for control output request | |
1361 | * argument: | |
1362 | * B channel control structure | |
1363 | */ | |
1364 | static void req_timeout(unsigned long data) | |
1365 | { | |
1366 | struct bc_state *bcs = (struct bc_state *) data; | |
d48c7784 | 1367 | struct bas_cardstate *ucs = bcs->cs->hw.bas; |
cf7776dc HL |
1368 | int pending; |
1369 | unsigned long flags; | |
1370 | ||
cf7776dc HL |
1371 | check_pending(ucs); |
1372 | ||
1373 | spin_lock_irqsave(&ucs->lock, flags); | |
1374 | pending = ucs->pending; | |
1375 | ucs->pending = 0; | |
1376 | spin_unlock_irqrestore(&ucs->lock, flags); | |
1377 | ||
1378 | switch (pending) { | |
1379 | case 0: /* no pending request */ | |
784d5858 | 1380 | gig_dbg(DEBUG_USBREQ, "%s: no request pending", __func__); |
cf7776dc HL |
1381 | break; |
1382 | ||
1383 | case HD_OPEN_ATCHANNEL: | |
784d5858 | 1384 | dev_err(bcs->cs->dev, "timeout opening AT channel\n"); |
cf7776dc HL |
1385 | error_reset(bcs->cs); |
1386 | break; | |
1387 | ||
1388 | case HD_OPEN_B2CHANNEL: | |
1389 | case HD_OPEN_B1CHANNEL: | |
784d5858 TS |
1390 | dev_err(bcs->cs->dev, "timeout opening channel %d\n", |
1391 | bcs->channel + 1); | |
cf7776dc HL |
1392 | error_hangup(bcs); |
1393 | break; | |
1394 | ||
1395 | case HD_CLOSE_ATCHANNEL: | |
784d5858 | 1396 | dev_err(bcs->cs->dev, "timeout closing AT channel\n"); |
cf7776dc HL |
1397 | break; |
1398 | ||
1399 | case HD_CLOSE_B2CHANNEL: | |
1400 | case HD_CLOSE_B1CHANNEL: | |
784d5858 TS |
1401 | dev_err(bcs->cs->dev, "timeout closing channel %d\n", |
1402 | bcs->channel + 1); | |
06163f86 | 1403 | error_reset(bcs->cs); |
cf7776dc HL |
1404 | break; |
1405 | ||
1406 | default: | |
784d5858 TS |
1407 | dev_warn(bcs->cs->dev, "request 0x%02x timed out, clearing\n", |
1408 | pending); | |
cf7776dc HL |
1409 | } |
1410 | } | |
1411 | ||
1412 | /* write_ctrl_callback | |
1413 | * USB completion handler for control pipe output | |
1414 | * called by the USB subsystem in interrupt context | |
1415 | * parameter: | |
1416 | * urb USB request block of completed request | |
1417 | * urb->context = hardware specific controller state structure | |
1418 | */ | |
1419 | static void write_ctrl_callback(struct urb *urb, struct pt_regs *regs) | |
1420 | { | |
d48c7784 | 1421 | struct bas_cardstate *ucs = urb->context; |
06163f86 | 1422 | int rc; |
cf7776dc HL |
1423 | unsigned long flags; |
1424 | ||
06163f86 TS |
1425 | /* check status */ |
1426 | switch (urb->status) { | |
1427 | case 0: /* normal completion */ | |
1428 | spin_lock_irqsave(&ucs->lock, flags); | |
1429 | switch (ucs->pending) { | |
1430 | case HD_DEVICE_INIT_ACK: /* no reply expected */ | |
1431 | del_timer(&ucs->timer_ctrl); | |
1432 | ucs->pending = 0; | |
1433 | break; | |
1434 | } | |
1435 | spin_unlock_irqrestore(&ucs->lock, flags); | |
1436 | return; | |
1437 | ||
1438 | case -ENOENT: /* cancelled */ | |
1439 | case -ECONNRESET: /* cancelled (async) */ | |
1440 | case -EINPROGRESS: /* pending */ | |
1441 | case -ENODEV: /* device removed */ | |
1442 | case -ESHUTDOWN: /* device shut down */ | |
1443 | /* ignore silently */ | |
1444 | gig_dbg(DEBUG_USBREQ, "%s: %s", | |
1445 | __func__, get_usb_statmsg(urb->status)); | |
cf7776dc | 1446 | break; |
06163f86 TS |
1447 | |
1448 | default: /* any failure */ | |
1449 | if (++ucs->retry_ctrl > BAS_RETRY) { | |
1450 | dev_err(&ucs->interface->dev, | |
1451 | "control request 0x%02x failed: %s\n", | |
1452 | ucs->dr_ctrl.bRequest, | |
1453 | get_usb_statmsg(urb->status)); | |
1454 | break; /* give up */ | |
1455 | } | |
1456 | dev_notice(&ucs->interface->dev, | |
1457 | "control request 0x%02x: %s, retry %d\n", | |
1458 | ucs->dr_ctrl.bRequest, get_usb_statmsg(urb->status), | |
1459 | ucs->retry_ctrl); | |
1460 | /* urb->dev is clobbered by USB subsystem */ | |
1461 | urb->dev = ucs->udev; | |
1462 | rc = usb_submit_urb(urb, SLAB_ATOMIC); | |
1463 | if (unlikely(rc)) { | |
1464 | dev_err(&ucs->interface->dev, | |
1465 | "could not resubmit request 0x%02x: %s\n", | |
1466 | ucs->dr_ctrl.bRequest, get_usb_rcmsg(rc)); | |
1467 | break; | |
1468 | } | |
1469 | /* resubmitted */ | |
1470 | return; | |
cf7776dc | 1471 | } |
06163f86 TS |
1472 | |
1473 | /* failed, clear pending request */ | |
1474 | spin_lock_irqsave(&ucs->lock, flags); | |
1475 | del_timer(&ucs->timer_ctrl); | |
1476 | ucs->pending = 0; | |
cf7776dc HL |
1477 | spin_unlock_irqrestore(&ucs->lock, flags); |
1478 | } | |
1479 | ||
1480 | /* req_submit | |
1481 | * submit a control output request without message buffer to the Gigaset base | |
1482 | * and optionally start a timeout | |
1483 | * parameters: | |
1484 | * bcs B channel control structure | |
1485 | * req control request code (HD_*) | |
1486 | * val control request parameter value (set to 0 if unused) | |
1487 | * timeout timeout in seconds (0: no timeout) | |
1488 | * return value: | |
1489 | * 0 on success | |
cf7776dc HL |
1490 | * -EBUSY if another request is pending |
1491 | * any URB submission error code | |
1492 | */ | |
1493 | static int req_submit(struct bc_state *bcs, int req, int val, int timeout) | |
1494 | { | |
d48c7784 | 1495 | struct bas_cardstate *ucs = bcs->cs->hw.bas; |
cf7776dc HL |
1496 | int ret; |
1497 | unsigned long flags; | |
1498 | ||
784d5858 | 1499 | gig_dbg(DEBUG_USBREQ, "-------> 0x%02x (%d)", req, val); |
cf7776dc HL |
1500 | |
1501 | spin_lock_irqsave(&ucs->lock, flags); | |
1502 | if (ucs->pending) { | |
1503 | spin_unlock_irqrestore(&ucs->lock, flags); | |
784d5858 TS |
1504 | dev_err(bcs->cs->dev, |
1505 | "submission of request 0x%02x failed: " | |
1506 | "request 0x%02x still pending\n", | |
1507 | req, ucs->pending); | |
cf7776dc HL |
1508 | return -EBUSY; |
1509 | } | |
cf7776dc HL |
1510 | |
1511 | ucs->dr_ctrl.bRequestType = OUT_VENDOR_REQ; | |
1512 | ucs->dr_ctrl.bRequest = req; | |
1513 | ucs->dr_ctrl.wValue = cpu_to_le16(val); | |
1514 | ucs->dr_ctrl.wIndex = 0; | |
1515 | ucs->dr_ctrl.wLength = 0; | |
1516 | usb_fill_control_urb(ucs->urb_ctrl, ucs->udev, | |
784d5858 TS |
1517 | usb_sndctrlpipe(ucs->udev, 0), |
1518 | (unsigned char*) &ucs->dr_ctrl, NULL, 0, | |
1519 | write_ctrl_callback, ucs); | |
06163f86 TS |
1520 | ucs->retry_ctrl = 0; |
1521 | ret = usb_submit_urb(ucs->urb_ctrl, SLAB_ATOMIC); | |
1522 | if (unlikely(ret)) { | |
784d5858 | 1523 | dev_err(bcs->cs->dev, "could not submit request 0x%02x: %s\n", |
06163f86 | 1524 | req, get_usb_rcmsg(ret)); |
cf7776dc HL |
1525 | spin_unlock_irqrestore(&ucs->lock, flags); |
1526 | return ret; | |
1527 | } | |
1528 | ucs->pending = req; | |
1529 | ||
1530 | if (timeout > 0) { | |
784d5858 | 1531 | gig_dbg(DEBUG_USBREQ, "setting timeout of %d/10 secs", timeout); |
cf7776dc HL |
1532 | ucs->timer_ctrl.expires = jiffies + timeout * HZ / 10; |
1533 | ucs->timer_ctrl.data = (unsigned long) bcs; | |
1534 | ucs->timer_ctrl.function = req_timeout; | |
1535 | add_timer(&ucs->timer_ctrl); | |
1536 | } | |
1537 | ||
1538 | spin_unlock_irqrestore(&ucs->lock, flags); | |
1539 | return 0; | |
1540 | } | |
1541 | ||
1542 | /* gigaset_init_bchannel | |
1543 | * called by common.c to connect a B channel | |
1544 | * initialize isochronous I/O and tell the Gigaset base to open the channel | |
1545 | * argument: | |
1546 | * B channel control structure | |
1547 | * return value: | |
1548 | * 0 on success, error code < 0 on error | |
1549 | */ | |
1550 | static int gigaset_init_bchannel(struct bc_state *bcs) | |
1551 | { | |
1552 | int req, ret; | |
73a88814 TS |
1553 | unsigned long flags; |
1554 | ||
1555 | spin_lock_irqsave(&bcs->cs->lock, flags); | |
1556 | if (unlikely(!bcs->cs->connected)) { | |
1557 | gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__); | |
1558 | spin_unlock_irqrestore(&bcs->cs->lock, flags); | |
1559 | return -ENODEV; | |
1560 | } | |
cf7776dc | 1561 | |
cf7776dc | 1562 | if ((ret = starturbs(bcs)) < 0) { |
784d5858 | 1563 | dev_err(bcs->cs->dev, |
73a88814 TS |
1564 | "could not start isochronous I/O for channel B%d: %s\n", |
1565 | bcs->channel + 1, | |
1566 | ret == -EFAULT ? "null URB" : get_usb_rcmsg(ret)); | |
1567 | if (ret != -ENODEV) | |
1568 | error_hangup(bcs); | |
1569 | spin_unlock_irqrestore(&bcs->cs->lock, flags); | |
cf7776dc HL |
1570 | return ret; |
1571 | } | |
1572 | ||
1573 | req = bcs->channel ? HD_OPEN_B2CHANNEL : HD_OPEN_B1CHANNEL; | |
1574 | if ((ret = req_submit(bcs, req, 0, BAS_TIMEOUT)) < 0) { | |
73a88814 TS |
1575 | dev_err(bcs->cs->dev, "could not open channel B%d\n", |
1576 | bcs->channel + 1); | |
cf7776dc | 1577 | stopurbs(bcs->hw.bas); |
73a88814 TS |
1578 | if (ret != -ENODEV) |
1579 | error_hangup(bcs); | |
cf7776dc | 1580 | } |
73a88814 TS |
1581 | |
1582 | spin_unlock_irqrestore(&bcs->cs->lock, flags); | |
cf7776dc HL |
1583 | return ret; |
1584 | } | |
1585 | ||
1586 | /* gigaset_close_bchannel | |
1587 | * called by common.c to disconnect a B channel | |
1588 | * tell the Gigaset base to close the channel | |
1589 | * stopping isochronous I/O and LL notification will be done when the | |
1590 | * acknowledgement for the close arrives | |
1591 | * argument: | |
1592 | * B channel control structure | |
1593 | * return value: | |
1594 | * 0 on success, error code < 0 on error | |
1595 | */ | |
1596 | static int gigaset_close_bchannel(struct bc_state *bcs) | |
1597 | { | |
1598 | int req, ret; | |
73a88814 TS |
1599 | unsigned long flags; |
1600 | ||
1601 | spin_lock_irqsave(&bcs->cs->lock, flags); | |
1602 | if (unlikely(!bcs->cs->connected)) { | |
1603 | spin_unlock_irqrestore(&bcs->cs->lock, flags); | |
1604 | gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__); | |
1605 | return -ENODEV; | |
1606 | } | |
cf7776dc | 1607 | |
cf7776dc HL |
1608 | if (!(atomic_read(&bcs->cs->hw.bas->basstate) & |
1609 | (bcs->channel ? BS_B2OPEN : BS_B1OPEN))) { | |
1610 | /* channel not running: just signal common.c */ | |
73a88814 | 1611 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
cf7776dc HL |
1612 | gigaset_bchannel_down(bcs); |
1613 | return 0; | |
1614 | } | |
1615 | ||
73a88814 | 1616 | /* channel running: tell device to close it */ |
cf7776dc HL |
1617 | req = bcs->channel ? HD_CLOSE_B2CHANNEL : HD_CLOSE_B1CHANNEL; |
1618 | if ((ret = req_submit(bcs, req, 0, BAS_TIMEOUT)) < 0) | |
73a88814 TS |
1619 | dev_err(bcs->cs->dev, "closing channel B%d failed\n", |
1620 | bcs->channel + 1); | |
1621 | ||
1622 | spin_unlock_irqrestore(&bcs->cs->lock, flags); | |
cf7776dc HL |
1623 | return ret; |
1624 | } | |
1625 | ||
1626 | /* Device Operations */ | |
1627 | /* ================= */ | |
1628 | ||
1629 | /* complete_cb | |
1630 | * unqueue first command buffer from queue, waking any sleepers | |
1631 | * must be called with cs->cmdlock held | |
1632 | * parameter: | |
1633 | * cs controller state structure | |
1634 | */ | |
1635 | static void complete_cb(struct cardstate *cs) | |
1636 | { | |
d48c7784 | 1637 | struct cmdbuf_t *cb = cs->cmdbuf; |
cf7776dc HL |
1638 | |
1639 | /* unqueue completed buffer */ | |
1640 | cs->cmdbytes -= cs->curlen; | |
784d5858 TS |
1641 | gig_dbg(DEBUG_TRANSCMD|DEBUG_LOCKCMD, |
1642 | "write_command: sent %u bytes, %u left", | |
1643 | cs->curlen, cs->cmdbytes); | |
cf7776dc HL |
1644 | if ((cs->cmdbuf = cb->next) != NULL) { |
1645 | cs->cmdbuf->prev = NULL; | |
1646 | cs->curlen = cs->cmdbuf->len; | |
1647 | } else { | |
1648 | cs->lastcmdbuf = NULL; | |
1649 | cs->curlen = 0; | |
1650 | } | |
1651 | ||
1652 | if (cb->wake_tasklet) | |
1653 | tasklet_schedule(cb->wake_tasklet); | |
1654 | ||
1655 | kfree(cb); | |
1656 | } | |
1657 | ||
cf7776dc HL |
1658 | /* write_command_callback |
1659 | * USB completion handler for AT command transmission | |
1660 | * called by the USB subsystem in interrupt context | |
1661 | * parameter: | |
1662 | * urb USB request block of completed request | |
1663 | * urb->context = controller state structure | |
1664 | */ | |
1665 | static void write_command_callback(struct urb *urb, struct pt_regs *regs) | |
1666 | { | |
d48c7784 TS |
1667 | struct cardstate *cs = urb->context; |
1668 | struct bas_cardstate *ucs = cs->hw.bas; | |
cf7776dc | 1669 | unsigned long flags; |
cf7776dc | 1670 | |
73a88814 TS |
1671 | update_basstate(ucs, 0, BS_ATWRPEND); |
1672 | ||
cf7776dc HL |
1673 | /* check status */ |
1674 | switch (urb->status) { | |
1675 | case 0: /* normal completion */ | |
1676 | break; | |
73a88814 TS |
1677 | case -ENOENT: /* cancelled */ |
1678 | case -ECONNRESET: /* cancelled (async) */ | |
cf7776dc | 1679 | case -EINPROGRESS: /* pending */ |
73a88814 TS |
1680 | case -ENODEV: /* device removed */ |
1681 | case -ESHUTDOWN: /* device shut down */ | |
cf7776dc | 1682 | /* ignore silently */ |
784d5858 TS |
1683 | gig_dbg(DEBUG_USBREQ, "%s: %s", |
1684 | __func__, get_usb_statmsg(urb->status)); | |
cf7776dc HL |
1685 | return; |
1686 | default: /* any failure */ | |
1687 | if (++ucs->retry_cmd_out > BAS_RETRY) { | |
784d5858 TS |
1688 | dev_warn(cs->dev, |
1689 | "command write: %s, " | |
1690 | "giving up after %d retries\n", | |
1691 | get_usb_statmsg(urb->status), | |
1692 | ucs->retry_cmd_out); | |
cf7776dc HL |
1693 | break; |
1694 | } | |
1695 | if (cs->cmdbuf == NULL) { | |
784d5858 TS |
1696 | dev_warn(cs->dev, |
1697 | "command write: %s, " | |
1698 | "cannot retry - cmdbuf gone\n", | |
1699 | get_usb_statmsg(urb->status)); | |
cf7776dc HL |
1700 | break; |
1701 | } | |
784d5858 TS |
1702 | dev_notice(cs->dev, "command write: %s, retry %d\n", |
1703 | get_usb_statmsg(urb->status), ucs->retry_cmd_out); | |
cf7776dc HL |
1704 | if (atwrite_submit(cs, cs->cmdbuf->buf, cs->cmdbuf->len) >= 0) |
1705 | /* resubmitted - bypass regular exit block */ | |
1706 | return; | |
1707 | /* command send failed, assume base still waiting */ | |
1708 | update_basstate(ucs, BS_ATREADY, 0); | |
1709 | } | |
1710 | ||
1711 | spin_lock_irqsave(&cs->cmdlock, flags); | |
1712 | if (cs->cmdbuf != NULL) | |
1713 | complete_cb(cs); | |
1714 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
1715 | } | |
1716 | ||
1717 | /* atrdy_timeout | |
1718 | * timeout routine for AT command transmission | |
1719 | * argument: | |
1720 | * controller state structure | |
1721 | */ | |
1722 | static void atrdy_timeout(unsigned long data) | |
1723 | { | |
1724 | struct cardstate *cs = (struct cardstate *) data; | |
d48c7784 | 1725 | struct bas_cardstate *ucs = cs->hw.bas; |
cf7776dc | 1726 | |
784d5858 | 1727 | dev_warn(cs->dev, "timeout waiting for HD_READY_SEND_ATDATA\n"); |
cf7776dc HL |
1728 | |
1729 | /* fake the missing signal - what else can I do? */ | |
1730 | update_basstate(ucs, BS_ATREADY, BS_ATTIMER); | |
1731 | start_cbsend(cs); | |
1732 | } | |
1733 | ||
1734 | /* atwrite_submit | |
1735 | * submit an HD_WRITE_ATMESSAGE command URB | |
1736 | * parameters: | |
1737 | * cs controller state structure | |
1738 | * buf buffer containing command to send | |
1739 | * len length of command to send | |
1740 | * return value: | |
1741 | * 0 on success | |
cf7776dc HL |
1742 | * -EBUSY if another request is pending |
1743 | * any URB submission error code | |
1744 | */ | |
1745 | static int atwrite_submit(struct cardstate *cs, unsigned char *buf, int len) | |
1746 | { | |
d48c7784 | 1747 | struct bas_cardstate *ucs = cs->hw.bas; |
73a88814 | 1748 | int rc; |
cf7776dc | 1749 | |
784d5858 | 1750 | gig_dbg(DEBUG_USBREQ, "-------> HD_WRITE_ATMESSAGE (%d)", len); |
cf7776dc | 1751 | |
73a88814 | 1752 | if (update_basstate(ucs, BS_ATWRPEND, 0) & BS_ATWRPEND) { |
784d5858 TS |
1753 | dev_err(cs->dev, |
1754 | "could not submit HD_WRITE_ATMESSAGE: URB busy\n"); | |
cf7776dc HL |
1755 | return -EBUSY; |
1756 | } | |
1757 | ||
1758 | ucs->dr_cmd_out.bRequestType = OUT_VENDOR_REQ; | |
1759 | ucs->dr_cmd_out.bRequest = HD_WRITE_ATMESSAGE; | |
1760 | ucs->dr_cmd_out.wValue = 0; | |
1761 | ucs->dr_cmd_out.wIndex = 0; | |
1762 | ucs->dr_cmd_out.wLength = cpu_to_le16(len); | |
1763 | usb_fill_control_urb(ucs->urb_cmd_out, ucs->udev, | |
1764 | usb_sndctrlpipe(ucs->udev, 0), | |
1765 | (unsigned char*) &ucs->dr_cmd_out, buf, len, | |
1766 | write_command_callback, cs); | |
73a88814 TS |
1767 | rc = usb_submit_urb(ucs->urb_cmd_out, SLAB_ATOMIC); |
1768 | if (unlikely(rc)) { | |
1769 | update_basstate(ucs, 0, BS_ATWRPEND); | |
784d5858 | 1770 | dev_err(cs->dev, "could not submit HD_WRITE_ATMESSAGE: %s\n", |
73a88814 TS |
1771 | get_usb_rcmsg(rc)); |
1772 | return rc; | |
cf7776dc HL |
1773 | } |
1774 | ||
73a88814 TS |
1775 | /* submitted successfully, start timeout if necessary */ |
1776 | if (!(update_basstate(ucs, BS_ATTIMER, BS_ATREADY) & BS_ATTIMER)) { | |
784d5858 TS |
1777 | gig_dbg(DEBUG_OUTPUT, "setting ATREADY timeout of %d/10 secs", |
1778 | ATRDY_TIMEOUT); | |
cf7776dc HL |
1779 | ucs->timer_atrdy.expires = jiffies + ATRDY_TIMEOUT * HZ / 10; |
1780 | ucs->timer_atrdy.data = (unsigned long) cs; | |
1781 | ucs->timer_atrdy.function = atrdy_timeout; | |
1782 | add_timer(&ucs->timer_atrdy); | |
cf7776dc HL |
1783 | } |
1784 | return 0; | |
1785 | } | |
1786 | ||
1787 | /* start_cbsend | |
1788 | * start transmission of AT command queue if necessary | |
1789 | * parameter: | |
1790 | * cs controller state structure | |
1791 | * return value: | |
1792 | * 0 on success | |
1793 | * error code < 0 on error | |
1794 | */ | |
1795 | static int start_cbsend(struct cardstate *cs) | |
1796 | { | |
1797 | struct cmdbuf_t *cb; | |
d48c7784 | 1798 | struct bas_cardstate *ucs = cs->hw.bas; |
cf7776dc HL |
1799 | unsigned long flags; |
1800 | int rc; | |
1801 | int retval = 0; | |
1802 | ||
cf7776dc HL |
1803 | /* check if AT channel is open */ |
1804 | if (!(atomic_read(&ucs->basstate) & BS_ATOPEN)) { | |
784d5858 | 1805 | gig_dbg(DEBUG_TRANSCMD|DEBUG_LOCKCMD, "AT channel not open"); |
cf7776dc HL |
1806 | rc = req_submit(cs->bcs, HD_OPEN_ATCHANNEL, 0, BAS_TIMEOUT); |
1807 | if (rc < 0) { | |
cf7776dc HL |
1808 | /* flush command queue */ |
1809 | spin_lock_irqsave(&cs->cmdlock, flags); | |
1810 | while (cs->cmdbuf != NULL) | |
1811 | complete_cb(cs); | |
1812 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
1813 | } | |
1814 | return rc; | |
1815 | } | |
1816 | ||
1817 | /* try to send first command in queue */ | |
1818 | spin_lock_irqsave(&cs->cmdlock, flags); | |
1819 | ||
1820 | while ((cb = cs->cmdbuf) != NULL && | |
1821 | atomic_read(&ucs->basstate) & BS_ATREADY) { | |
1822 | ucs->retry_cmd_out = 0; | |
1823 | rc = atwrite_submit(cs, cb->buf, cb->len); | |
1824 | if (unlikely(rc)) { | |
1825 | retval = rc; | |
1826 | complete_cb(cs); | |
1827 | } | |
1828 | } | |
1829 | ||
1830 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
1831 | return retval; | |
1832 | } | |
1833 | ||
1834 | /* gigaset_write_cmd | |
1835 | * This function is called by the device independent part of the driver | |
1836 | * to transmit an AT command string to the Gigaset device. | |
1837 | * It encapsulates the device specific method for transmission over the | |
1838 | * direct USB connection to the base. | |
1839 | * The command string is added to the queue of commands to send, and | |
1840 | * USB transmission is started if necessary. | |
1841 | * parameters: | |
1842 | * cs controller state structure | |
1843 | * buf command string to send | |
1844 | * len number of bytes to send (max. IF_WRITEBUF) | |
917f5085 TS |
1845 | * wake_tasklet tasklet to run when transmission is completed |
1846 | * (NULL if none) | |
cf7776dc HL |
1847 | * return value: |
1848 | * number of bytes queued on success | |
1849 | * error code < 0 on error | |
1850 | */ | |
1851 | static int gigaset_write_cmd(struct cardstate *cs, | |
784d5858 TS |
1852 | const unsigned char *buf, int len, |
1853 | struct tasklet_struct *wake_tasklet) | |
cf7776dc HL |
1854 | { |
1855 | struct cmdbuf_t *cb; | |
1856 | unsigned long flags; | |
1857 | int status; | |
1858 | ||
1859 | gigaset_dbg_buffer(atomic_read(&cs->mstate) != MS_LOCKED ? | |
784d5858 | 1860 | DEBUG_TRANSCMD : DEBUG_LOCKCMD, |
01371500 | 1861 | "CMD Transmit", len, buf); |
cf7776dc | 1862 | |
cf7776dc HL |
1863 | if (len <= 0) |
1864 | return 0; /* nothing to do */ | |
1865 | ||
1866 | if (len > IF_WRITEBUF) | |
1867 | len = IF_WRITEBUF; | |
1868 | if (!(cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC))) { | |
784d5858 | 1869 | dev_err(cs->dev, "%s: out of memory\n", __func__); |
cf7776dc HL |
1870 | return -ENOMEM; |
1871 | } | |
1872 | ||
1873 | memcpy(cb->buf, buf, len); | |
1874 | cb->len = len; | |
1875 | cb->offset = 0; | |
1876 | cb->next = NULL; | |
1877 | cb->wake_tasklet = wake_tasklet; | |
1878 | ||
1879 | spin_lock_irqsave(&cs->cmdlock, flags); | |
1880 | cb->prev = cs->lastcmdbuf; | |
1881 | if (cs->lastcmdbuf) | |
1882 | cs->lastcmdbuf->next = cb; | |
1883 | else { | |
1884 | cs->cmdbuf = cb; | |
1885 | cs->curlen = len; | |
1886 | } | |
1887 | cs->cmdbytes += len; | |
1888 | cs->lastcmdbuf = cb; | |
1889 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
1890 | ||
73a88814 TS |
1891 | spin_lock_irqsave(&cs->lock, flags); |
1892 | if (unlikely(!cs->connected)) { | |
1893 | spin_unlock_irqrestore(&cs->lock, flags); | |
1894 | gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__); | |
1895 | return -ENODEV; | |
1896 | } | |
cf7776dc | 1897 | status = start_cbsend(cs); |
73a88814 | 1898 | spin_unlock_irqrestore(&cs->lock, flags); |
cf7776dc HL |
1899 | return status < 0 ? status : len; |
1900 | } | |
1901 | ||
1902 | /* gigaset_write_room | |
1903 | * tty_driver.write_room interface routine | |
917f5085 TS |
1904 | * return number of characters the driver will accept to be written via |
1905 | * gigaset_write_cmd | |
cf7776dc HL |
1906 | * parameter: |
1907 | * controller state structure | |
1908 | * return value: | |
1909 | * number of characters | |
1910 | */ | |
1911 | static int gigaset_write_room(struct cardstate *cs) | |
1912 | { | |
1913 | return IF_WRITEBUF; | |
1914 | } | |
1915 | ||
1916 | /* gigaset_chars_in_buffer | |
1917 | * tty_driver.chars_in_buffer interface routine | |
1918 | * return number of characters waiting to be sent | |
1919 | * parameter: | |
1920 | * controller state structure | |
1921 | * return value: | |
1922 | * number of characters | |
1923 | */ | |
1924 | static int gigaset_chars_in_buffer(struct cardstate *cs) | |
1925 | { | |
1926 | unsigned long flags; | |
1927 | unsigned bytes; | |
1928 | ||
1929 | spin_lock_irqsave(&cs->cmdlock, flags); | |
1930 | bytes = cs->cmdbytes; | |
1931 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
1932 | ||
1933 | return bytes; | |
1934 | } | |
1935 | ||
1936 | /* gigaset_brkchars | |
1937 | * implementation of ioctl(GIGASET_BRKCHARS) | |
1938 | * parameter: | |
1939 | * controller state structure | |
1940 | * return value: | |
1941 | * -EINVAL (unimplemented function) | |
1942 | */ | |
1943 | static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6]) | |
1944 | { | |
1945 | return -EINVAL; | |
1946 | } | |
1947 | ||
1948 | ||
1949 | /* Device Initialization/Shutdown */ | |
1950 | /* ============================== */ | |
1951 | ||
1952 | /* Free hardware dependent part of the B channel structure | |
1953 | * parameter: | |
1954 | * bcs B channel structure | |
1955 | * return value: | |
1956 | * !=0 on success | |
1957 | */ | |
1958 | static int gigaset_freebcshw(struct bc_state *bcs) | |
1959 | { | |
73a88814 TS |
1960 | struct bas_bc_state *ubc = bcs->hw.bas; |
1961 | int i; | |
1962 | ||
1963 | if (!ubc) | |
cf7776dc HL |
1964 | return 0; |
1965 | ||
73a88814 TS |
1966 | /* kill URBs and tasklets before freeing - better safe than sorry */ |
1967 | atomic_set(&ubc->running, 0); | |
1968 | for (i = 0; i < BAS_OUTURBS; ++i) | |
1969 | if (ubc->isoouturbs[i].urb) { | |
1970 | gig_dbg(DEBUG_INIT, "%s: killing iso out URB %d", | |
1971 | __func__, i); | |
1972 | usb_kill_urb(ubc->isoouturbs[i].urb); | |
1973 | usb_free_urb(ubc->isoouturbs[i].urb); | |
1974 | } | |
1975 | for (i = 0; i < BAS_INURBS; ++i) | |
1976 | if (ubc->isoinurbs[i]) { | |
1977 | gig_dbg(DEBUG_INIT, "%s: killing iso in URB %d", | |
1978 | __func__, i); | |
1979 | usb_kill_urb(ubc->isoinurbs[i]); | |
1980 | usb_free_urb(ubc->isoinurbs[i]); | |
1981 | } | |
1982 | tasklet_kill(&ubc->sent_tasklet); | |
1983 | tasklet_kill(&ubc->rcvd_tasklet); | |
1984 | kfree(ubc->isooutbuf); | |
1985 | kfree(ubc); | |
cf7776dc HL |
1986 | bcs->hw.bas = NULL; |
1987 | return 1; | |
1988 | } | |
1989 | ||
1990 | /* Initialize hardware dependent part of the B channel structure | |
1991 | * parameter: | |
1992 | * bcs B channel structure | |
1993 | * return value: | |
1994 | * !=0 on success | |
1995 | */ | |
1996 | static int gigaset_initbcshw(struct bc_state *bcs) | |
1997 | { | |
1998 | int i; | |
1999 | struct bas_bc_state *ubc; | |
2000 | ||
2001 | bcs->hw.bas = ubc = kmalloc(sizeof(struct bas_bc_state), GFP_KERNEL); | |
2002 | if (!ubc) { | |
2003 | err("could not allocate bas_bc_state"); | |
2004 | return 0; | |
2005 | } | |
2006 | ||
2007 | atomic_set(&ubc->running, 0); | |
2008 | atomic_set(&ubc->corrbytes, 0); | |
2009 | spin_lock_init(&ubc->isooutlock); | |
2010 | for (i = 0; i < BAS_OUTURBS; ++i) { | |
2011 | ubc->isoouturbs[i].urb = NULL; | |
2012 | ubc->isoouturbs[i].bcs = bcs; | |
2013 | } | |
2014 | ubc->isooutdone = ubc->isooutfree = ubc->isooutovfl = NULL; | |
2015 | ubc->numsub = 0; | |
2016 | if (!(ubc->isooutbuf = kmalloc(sizeof(struct isowbuf_t), GFP_KERNEL))) { | |
2017 | err("could not allocate isochronous output buffer"); | |
2018 | kfree(ubc); | |
2019 | bcs->hw.bas = NULL; | |
2020 | return 0; | |
2021 | } | |
2022 | tasklet_init(&ubc->sent_tasklet, | |
784d5858 | 2023 | &write_iso_tasklet, (unsigned long) bcs); |
cf7776dc HL |
2024 | |
2025 | spin_lock_init(&ubc->isoinlock); | |
2026 | for (i = 0; i < BAS_INURBS; ++i) | |
2027 | ubc->isoinurbs[i] = NULL; | |
2028 | ubc->isoindone = NULL; | |
2029 | ubc->loststatus = -EINPROGRESS; | |
2030 | ubc->isoinlost = 0; | |
2031 | ubc->seqlen = 0; | |
2032 | ubc->inbyte = 0; | |
2033 | ubc->inbits = 0; | |
2034 | ubc->goodbytes = 0; | |
2035 | ubc->alignerrs = 0; | |
2036 | ubc->fcserrs = 0; | |
2037 | ubc->frameerrs = 0; | |
2038 | ubc->giants = 0; | |
2039 | ubc->runts = 0; | |
2040 | ubc->aborts = 0; | |
2041 | ubc->shared0s = 0; | |
2042 | ubc->stolen0s = 0; | |
2043 | tasklet_init(&ubc->rcvd_tasklet, | |
784d5858 | 2044 | &read_iso_tasklet, (unsigned long) bcs); |
cf7776dc HL |
2045 | return 1; |
2046 | } | |
2047 | ||
2048 | static void gigaset_reinitbcshw(struct bc_state *bcs) | |
2049 | { | |
2050 | struct bas_bc_state *ubc = bcs->hw.bas; | |
2051 | ||
2052 | atomic_set(&bcs->hw.bas->running, 0); | |
2053 | atomic_set(&bcs->hw.bas->corrbytes, 0); | |
2054 | bcs->hw.bas->numsub = 0; | |
2055 | spin_lock_init(&ubc->isooutlock); | |
2056 | spin_lock_init(&ubc->isoinlock); | |
2057 | ubc->loststatus = -EINPROGRESS; | |
2058 | } | |
2059 | ||
2060 | static void gigaset_freecshw(struct cardstate *cs) | |
2061 | { | |
73a88814 | 2062 | /* timers, URBs and rcvbuf are disposed of in disconnect */ |
cf7776dc | 2063 | kfree(cs->hw.bas); |
73a88814 | 2064 | cs->hw.bas = NULL; |
cf7776dc HL |
2065 | } |
2066 | ||
2067 | static int gigaset_initcshw(struct cardstate *cs) | |
2068 | { | |
2069 | struct bas_cardstate *ucs; | |
2070 | ||
2071 | cs->hw.bas = ucs = kmalloc(sizeof *ucs, GFP_KERNEL); | |
2072 | if (!ucs) | |
2073 | return 0; | |
2074 | ||
2075 | ucs->urb_cmd_in = NULL; | |
2076 | ucs->urb_cmd_out = NULL; | |
2077 | ucs->rcvbuf = NULL; | |
2078 | ucs->rcvbuf_size = 0; | |
2079 | ||
2080 | spin_lock_init(&ucs->lock); | |
2081 | ucs->pending = 0; | |
2082 | ||
2083 | atomic_set(&ucs->basstate, 0); | |
2084 | init_timer(&ucs->timer_ctrl); | |
2085 | init_timer(&ucs->timer_atrdy); | |
2086 | init_timer(&ucs->timer_cmd_in); | |
2087 | ||
2088 | return 1; | |
2089 | } | |
2090 | ||
2091 | /* freeurbs | |
2092 | * unlink and deallocate all URBs unconditionally | |
2093 | * caller must make sure that no commands are still in progress | |
2094 | * parameter: | |
2095 | * cs controller state structure | |
2096 | */ | |
2097 | static void freeurbs(struct cardstate *cs) | |
2098 | { | |
d48c7784 | 2099 | struct bas_cardstate *ucs = cs->hw.bas; |
cf7776dc HL |
2100 | struct bas_bc_state *ubc; |
2101 | int i, j; | |
2102 | ||
cf7776dc HL |
2103 | for (j = 0; j < 2; ++j) { |
2104 | ubc = cs->bcs[j].hw.bas; | |
cf7776dc HL |
2105 | for (i = 0; i < BAS_OUTURBS; ++i) |
2106 | if (ubc->isoouturbs[i].urb) { | |
2107 | usb_kill_urb(ubc->isoouturbs[i].urb); | |
784d5858 TS |
2108 | gig_dbg(DEBUG_INIT, |
2109 | "%s: isoc output URB %d/%d unlinked", | |
2110 | __func__, j, i); | |
cf7776dc HL |
2111 | usb_free_urb(ubc->isoouturbs[i].urb); |
2112 | ubc->isoouturbs[i].urb = NULL; | |
2113 | } | |
2114 | for (i = 0; i < BAS_INURBS; ++i) | |
2115 | if (ubc->isoinurbs[i]) { | |
2116 | usb_kill_urb(ubc->isoinurbs[i]); | |
784d5858 TS |
2117 | gig_dbg(DEBUG_INIT, |
2118 | "%s: isoc input URB %d/%d unlinked", | |
2119 | __func__, j, i); | |
cf7776dc HL |
2120 | usb_free_urb(ubc->isoinurbs[i]); |
2121 | ubc->isoinurbs[i] = NULL; | |
2122 | } | |
2123 | } | |
2124 | if (ucs->urb_int_in) { | |
2125 | usb_kill_urb(ucs->urb_int_in); | |
784d5858 TS |
2126 | gig_dbg(DEBUG_INIT, "%s: interrupt input URB unlinked", |
2127 | __func__); | |
cf7776dc HL |
2128 | usb_free_urb(ucs->urb_int_in); |
2129 | ucs->urb_int_in = NULL; | |
2130 | } | |
2131 | if (ucs->urb_cmd_out) { | |
2132 | usb_kill_urb(ucs->urb_cmd_out); | |
784d5858 TS |
2133 | gig_dbg(DEBUG_INIT, "%s: command output URB unlinked", |
2134 | __func__); | |
cf7776dc HL |
2135 | usb_free_urb(ucs->urb_cmd_out); |
2136 | ucs->urb_cmd_out = NULL; | |
2137 | } | |
2138 | if (ucs->urb_cmd_in) { | |
2139 | usb_kill_urb(ucs->urb_cmd_in); | |
784d5858 TS |
2140 | gig_dbg(DEBUG_INIT, "%s: command input URB unlinked", |
2141 | __func__); | |
cf7776dc HL |
2142 | usb_free_urb(ucs->urb_cmd_in); |
2143 | ucs->urb_cmd_in = NULL; | |
2144 | } | |
2145 | if (ucs->urb_ctrl) { | |
2146 | usb_kill_urb(ucs->urb_ctrl); | |
784d5858 TS |
2147 | gig_dbg(DEBUG_INIT, "%s: control output URB unlinked", |
2148 | __func__); | |
cf7776dc HL |
2149 | usb_free_urb(ucs->urb_ctrl); |
2150 | ucs->urb_ctrl = NULL; | |
2151 | } | |
2152 | } | |
2153 | ||
2154 | /* gigaset_probe | |
2155 | * This function is called when a new USB device is connected. | |
2156 | * It checks whether the new device is handled by this driver. | |
2157 | */ | |
2158 | static int gigaset_probe(struct usb_interface *interface, | |
2159 | const struct usb_device_id *id) | |
2160 | { | |
2161 | struct usb_host_interface *hostif; | |
2162 | struct usb_device *udev = interface_to_usbdev(interface); | |
2163 | struct cardstate *cs = NULL; | |
2164 | struct bas_cardstate *ucs = NULL; | |
2165 | struct bas_bc_state *ubc; | |
2166 | struct usb_endpoint_descriptor *endpoint; | |
2167 | int i, j; | |
73a88814 | 2168 | int rc; |
cf7776dc | 2169 | |
784d5858 TS |
2170 | gig_dbg(DEBUG_ANY, |
2171 | "%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)", | |
2172 | __func__, le16_to_cpu(udev->descriptor.idVendor), | |
2173 | le16_to_cpu(udev->descriptor.idProduct)); | |
cf7776dc | 2174 | |
cf7776dc HL |
2175 | /* set required alternate setting */ |
2176 | hostif = interface->cur_altsetting; | |
2177 | if (hostif->desc.bAlternateSetting != 3) { | |
784d5858 TS |
2178 | gig_dbg(DEBUG_ANY, |
2179 | "%s: wrong alternate setting %d - trying to switch", | |
2180 | __func__, hostif->desc.bAlternateSetting); | |
cf7776dc | 2181 | if (usb_set_interface(udev, hostif->desc.bInterfaceNumber, 3) < 0) { |
784d5858 TS |
2182 | dev_warn(&udev->dev, "usb_set_interface failed, " |
2183 | "device %d interface %d altsetting %d\n", | |
2184 | udev->devnum, hostif->desc.bInterfaceNumber, | |
2185 | hostif->desc.bAlternateSetting); | |
cf7776dc HL |
2186 | return -ENODEV; |
2187 | } | |
2188 | hostif = interface->cur_altsetting; | |
2189 | } | |
2190 | ||
2191 | /* Reject application specific interfaces | |
2192 | */ | |
2193 | if (hostif->desc.bInterfaceClass != 255) { | |
784d5858 TS |
2194 | dev_warn(&udev->dev, "%s: bInterfaceClass == %d\n", |
2195 | __func__, hostif->desc.bInterfaceClass); | |
cf7776dc HL |
2196 | return -ENODEV; |
2197 | } | |
2198 | ||
784d5858 TS |
2199 | dev_info(&udev->dev, |
2200 | "%s: Device matched (Vendor: 0x%x, Product: 0x%x)\n", | |
2201 | __func__, le16_to_cpu(udev->descriptor.idVendor), | |
2202 | le16_to_cpu(udev->descriptor.idProduct)); | |
cf7776dc HL |
2203 | |
2204 | cs = gigaset_getunassignedcs(driver); | |
2205 | if (!cs) { | |
784d5858 | 2206 | dev_err(&udev->dev, "no free cardstate\n"); |
cf7776dc HL |
2207 | return -ENODEV; |
2208 | } | |
2209 | ucs = cs->hw.bas; | |
784d5858 TS |
2210 | |
2211 | /* save off device structure ptrs for later use */ | |
2212 | usb_get_dev(udev); | |
cf7776dc HL |
2213 | ucs->udev = udev; |
2214 | ucs->interface = interface; | |
b1d47464 | 2215 | cs->dev = &interface->dev; |
cf7776dc HL |
2216 | |
2217 | /* allocate URBs: | |
2218 | * - one for the interrupt pipe | |
2219 | * - three for the different uses of the default control pipe | |
2220 | * - three for each isochronous pipe | |
2221 | */ | |
73a88814 TS |
2222 | if (!(ucs->urb_int_in = usb_alloc_urb(0, SLAB_KERNEL)) || |
2223 | !(ucs->urb_cmd_in = usb_alloc_urb(0, SLAB_KERNEL)) || | |
2224 | !(ucs->urb_cmd_out = usb_alloc_urb(0, SLAB_KERNEL)) || | |
2225 | !(ucs->urb_ctrl = usb_alloc_urb(0, SLAB_KERNEL))) | |
2226 | goto allocerr; | |
cf7776dc HL |
2227 | |
2228 | for (j = 0; j < 2; ++j) { | |
2229 | ubc = cs->bcs[j].hw.bas; | |
73a88814 TS |
2230 | for (i = 0; i < BAS_OUTURBS; ++i) |
2231 | if (!(ubc->isoouturbs[i].urb = | |
2232 | usb_alloc_urb(BAS_NUMFRAMES, SLAB_KERNEL))) | |
2233 | goto allocerr; | |
2234 | for (i = 0; i < BAS_INURBS; ++i) | |
2235 | if (!(ubc->isoinurbs[i] = | |
2236 | usb_alloc_urb(BAS_NUMFRAMES, SLAB_KERNEL))) | |
2237 | goto allocerr; | |
cf7776dc HL |
2238 | } |
2239 | ||
2240 | ucs->rcvbuf = NULL; | |
2241 | ucs->rcvbuf_size = 0; | |
2242 | ||
2243 | /* Fill the interrupt urb and send it to the core */ | |
2244 | endpoint = &hostif->endpoint[0].desc; | |
2245 | usb_fill_int_urb(ucs->urb_int_in, udev, | |
784d5858 TS |
2246 | usb_rcvintpipe(udev, |
2247 | (endpoint->bEndpointAddress) & 0x0f), | |
2248 | ucs->int_in_buf, 3, read_int_callback, cs, | |
2249 | endpoint->bInterval); | |
73a88814 | 2250 | if ((rc = usb_submit_urb(ucs->urb_int_in, SLAB_KERNEL)) != 0) { |
784d5858 | 2251 | dev_err(cs->dev, "could not submit interrupt URB: %s\n", |
73a88814 | 2252 | get_usb_rcmsg(rc)); |
cf7776dc HL |
2253 | goto error; |
2254 | } | |
2255 | ||
2256 | /* tell the device that the driver is ready */ | |
73a88814 | 2257 | if ((rc = req_submit(cs->bcs, HD_DEVICE_INIT_ACK, 0, 0)) != 0) |
cf7776dc HL |
2258 | goto error; |
2259 | ||
2260 | /* tell common part that the device is ready */ | |
2261 | if (startmode == SM_LOCKED) | |
2262 | atomic_set(&cs->mstate, MS_LOCKED); | |
cf7776dc HL |
2263 | |
2264 | /* save address of controller structure */ | |
2265 | usb_set_intfdata(interface, cs); | |
2266 | ||
b1d47464 TS |
2267 | if (!gigaset_start(cs)) |
2268 | goto error; | |
2269 | ||
cf7776dc HL |
2270 | return 0; |
2271 | ||
73a88814 TS |
2272 | allocerr: |
2273 | dev_err(cs->dev, "could not allocate URBs\n"); | |
cf7776dc HL |
2274 | error: |
2275 | freeurbs(cs); | |
69049cc8 | 2276 | usb_set_intfdata(interface, NULL); |
cf7776dc HL |
2277 | gigaset_unassign(cs); |
2278 | return -ENODEV; | |
2279 | } | |
2280 | ||
2281 | /* gigaset_disconnect | |
2282 | * This function is called when the Gigaset base is unplugged. | |
2283 | */ | |
2284 | static void gigaset_disconnect(struct usb_interface *interface) | |
2285 | { | |
2286 | struct cardstate *cs; | |
2287 | struct bas_cardstate *ucs; | |
73a88814 | 2288 | int j; |
cf7776dc | 2289 | |
cf7776dc | 2290 | cs = usb_get_intfdata(interface); |
cf7776dc | 2291 | |
cf7776dc | 2292 | ucs = cs->hw.bas; |
cf7776dc | 2293 | |
b1d47464 | 2294 | dev_info(cs->dev, "disconnecting Gigaset base\n"); |
73a88814 TS |
2295 | |
2296 | /* mark base as not ready, all channels disconnected */ | |
2297 | atomic_set(&ucs->basstate, 0); | |
2298 | ||
2299 | /* tell LL all channels are down */ | |
2300 | //FIXME shouldn't gigaset_stop() do this? | |
2301 | for (j = 0; j < 2; ++j) | |
2302 | gigaset_bchannel_down(cs->bcs + j); | |
2303 | ||
2304 | /* stop driver (common part) */ | |
cf7776dc | 2305 | gigaset_stop(cs); |
73a88814 TS |
2306 | |
2307 | /* stop timers and URBs, free ressources */ | |
2308 | del_timer_sync(&ucs->timer_ctrl); | |
2309 | del_timer_sync(&ucs->timer_atrdy); | |
2310 | del_timer_sync(&ucs->timer_cmd_in); | |
cf7776dc | 2311 | freeurbs(cs); |
b1d47464 | 2312 | usb_set_intfdata(interface, NULL); |
cf7776dc HL |
2313 | kfree(ucs->rcvbuf); |
2314 | ucs->rcvbuf = NULL; | |
2315 | ucs->rcvbuf_size = 0; | |
b1d47464 TS |
2316 | usb_put_dev(ucs->udev); |
2317 | ucs->interface = NULL; | |
2318 | ucs->udev = NULL; | |
2319 | cs->dev = NULL; | |
cf7776dc HL |
2320 | gigaset_unassign(cs); |
2321 | } | |
2322 | ||
2323 | static struct gigaset_ops gigops = { | |
2324 | gigaset_write_cmd, | |
2325 | gigaset_write_room, | |
2326 | gigaset_chars_in_buffer, | |
2327 | gigaset_brkchars, | |
2328 | gigaset_init_bchannel, | |
2329 | gigaset_close_bchannel, | |
2330 | gigaset_initbcshw, | |
2331 | gigaset_freebcshw, | |
2332 | gigaset_reinitbcshw, | |
2333 | gigaset_initcshw, | |
2334 | gigaset_freecshw, | |
2335 | gigaset_set_modem_ctrl, | |
2336 | gigaset_baud_rate, | |
2337 | gigaset_set_line_ctrl, | |
2338 | gigaset_isoc_send_skb, | |
2339 | gigaset_isoc_input, | |
2340 | }; | |
2341 | ||
2342 | /* bas_gigaset_init | |
2343 | * This function is called after the kernel module is loaded. | |
2344 | */ | |
2345 | static int __init bas_gigaset_init(void) | |
2346 | { | |
2347 | int result; | |
2348 | ||
2349 | /* allocate memory for our driver state and intialize it */ | |
2350 | if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS, | |
784d5858 TS |
2351 | GIGASET_MODULENAME, GIGASET_DEVNAME, |
2352 | GIGASET_DEVFSNAME, &gigops, | |
2353 | THIS_MODULE)) == NULL) | |
cf7776dc HL |
2354 | goto error; |
2355 | ||
2356 | /* allocate memory for our device state and intialize it */ | |
917f5085 TS |
2357 | cardstate = gigaset_initcs(driver, 2, 0, 0, cidmode, |
2358 | GIGASET_MODULENAME); | |
cf7776dc HL |
2359 | if (!cardstate) |
2360 | goto error; | |
2361 | ||
2362 | /* register this driver with the USB subsystem */ | |
2363 | result = usb_register(&gigaset_usb_driver); | |
2364 | if (result < 0) { | |
2365 | err("usb_register failed (error %d)", -result); | |
2366 | goto error; | |
2367 | } | |
2368 | ||
2369 | info(DRIVER_AUTHOR); | |
2370 | info(DRIVER_DESC); | |
2371 | return 0; | |
2372 | ||
2373 | error: if (cardstate) | |
2374 | gigaset_freecs(cardstate); | |
2375 | cardstate = NULL; | |
2376 | if (driver) | |
2377 | gigaset_freedriver(driver); | |
2378 | driver = NULL; | |
2379 | return -1; | |
2380 | } | |
2381 | ||
2382 | /* bas_gigaset_exit | |
2383 | * This function is called before the kernel module is unloaded. | |
2384 | */ | |
2385 | static void __exit bas_gigaset_exit(void) | |
2386 | { | |
73a88814 TS |
2387 | struct bas_cardstate *ucs = cardstate->hw.bas; |
2388 | ||
cf7776dc | 2389 | gigaset_blockdriver(driver); /* => probe will fail |
784d5858 TS |
2390 | * => no gigaset_start any more |
2391 | */ | |
cf7776dc HL |
2392 | |
2393 | gigaset_shutdown(cardstate); | |
2394 | /* from now on, no isdn callback should be possible */ | |
2395 | ||
73a88814 TS |
2396 | /* close all still open channels */ |
2397 | if (atomic_read(&ucs->basstate) & BS_B1OPEN) { | |
2398 | gig_dbg(DEBUG_INIT, "closing B1 channel"); | |
2399 | usb_control_msg(ucs->udev, usb_sndctrlpipe(ucs->udev, 0), | |
2400 | HD_CLOSE_B1CHANNEL, OUT_VENDOR_REQ, 0, 0, | |
2401 | NULL, 0, BAS_TIMEOUT); | |
2402 | } | |
2403 | if (atomic_read(&ucs->basstate) & BS_B2OPEN) { | |
2404 | gig_dbg(DEBUG_INIT, "closing B2 channel"); | |
2405 | usb_control_msg(ucs->udev, usb_sndctrlpipe(ucs->udev, 0), | |
2406 | HD_CLOSE_B2CHANNEL, OUT_VENDOR_REQ, 0, 0, | |
2407 | NULL, 0, BAS_TIMEOUT); | |
2408 | } | |
2409 | if (atomic_read(&ucs->basstate) & BS_ATOPEN) { | |
2410 | gig_dbg(DEBUG_INIT, "closing AT channel"); | |
2411 | usb_control_msg(ucs->udev, usb_sndctrlpipe(ucs->udev, 0), | |
2412 | HD_CLOSE_ATCHANNEL, OUT_VENDOR_REQ, 0, 0, | |
2413 | NULL, 0, BAS_TIMEOUT); | |
cf7776dc | 2414 | } |
73a88814 | 2415 | atomic_set(&ucs->basstate, 0); |
cf7776dc HL |
2416 | |
2417 | /* deregister this driver with the USB subsystem */ | |
2418 | usb_deregister(&gigaset_usb_driver); | |
2419 | /* this will call the disconnect-callback */ | |
2420 | /* from now on, no disconnect/probe callback should be running */ | |
2421 | ||
2422 | gigaset_freecs(cardstate); | |
2423 | cardstate = NULL; | |
2424 | gigaset_freedriver(driver); | |
2425 | driver = NULL; | |
2426 | } | |
2427 | ||
2428 | ||
2429 | module_init(bas_gigaset_init); | |
2430 | module_exit(bas_gigaset_exit); | |
2431 | ||
2432 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
2433 | MODULE_DESCRIPTION(DRIVER_DESC); | |
2434 | MODULE_LICENSE("GPL"); |