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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" | |
cf7776dc HL |
17 | #include <linux/usb.h> |
18 | #include <linux/module.h> | |
19 | #include <linux/moduleparam.h> | |
20 | ||
21 | /* Version Information */ | |
70440cf2 | 22 | #define DRIVER_AUTHOR "Tilman Schmidt <tilman@imap.cc>, Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers" |
cf7776dc HL |
23 | #define DRIVER_DESC "USB Driver for Gigaset 307x" |
24 | ||
25 | ||
26 | /* Module parameters */ | |
27 | ||
28 | static int startmode = SM_ISDN; | |
29 | static int cidmode = 1; | |
30 | ||
31 | module_param(startmode, int, S_IRUGO); | |
32 | module_param(cidmode, int, S_IRUGO); | |
33 | MODULE_PARM_DESC(startmode, "start in isdn4linux mode"); | |
34 | MODULE_PARM_DESC(cidmode, "Call-ID mode"); | |
35 | ||
36 | #define GIGASET_MINORS 1 | |
37 | #define GIGASET_MINOR 16 | |
38 | #define GIGASET_MODULENAME "bas_gigaset" | |
cf7776dc HL |
39 | #define GIGASET_DEVNAME "ttyGB" |
40 | ||
73a88814 TS |
41 | /* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */ |
42 | #define IF_WRITEBUF 264 | |
cf7776dc | 43 | |
170ebf85 TS |
44 | /* interrupt pipe message size according to ibid. ch. 2.2 */ |
45 | #define IP_MSGSIZE 3 | |
46 | ||
cf7776dc HL |
47 | /* Values for the Gigaset 307x */ |
48 | #define USB_GIGA_VENDOR_ID 0x0681 | |
73a88814 TS |
49 | #define USB_3070_PRODUCT_ID 0x0001 |
50 | #define USB_3075_PRODUCT_ID 0x0002 | |
cf7776dc HL |
51 | #define USB_SX303_PRODUCT_ID 0x0021 |
52 | #define USB_SX353_PRODUCT_ID 0x0022 | |
53 | ||
54 | /* table of devices that work with this driver */ | |
7891adf1 | 55 | static const struct usb_device_id gigaset_table[] = { |
73a88814 TS |
56 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_3070_PRODUCT_ID) }, |
57 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_3075_PRODUCT_ID) }, | |
cf7776dc HL |
58 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX303_PRODUCT_ID) }, |
59 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX353_PRODUCT_ID) }, | |
60 | { } /* Terminating entry */ | |
61 | }; | |
62 | ||
63 | MODULE_DEVICE_TABLE(usb, gigaset_table); | |
64 | ||
06163f86 | 65 | /*======================= local function prototypes ==========================*/ |
cf7776dc | 66 | |
06163f86 | 67 | /* function called if a new device belonging to this driver is connected */ |
cf7776dc HL |
68 | static int gigaset_probe(struct usb_interface *interface, |
69 | const struct usb_device_id *id); | |
70 | ||
71 | /* Function will be called if the device is unplugged */ | |
72 | static void gigaset_disconnect(struct usb_interface *interface); | |
73 | ||
024fd299 TS |
74 | /* functions called before/after suspend */ |
75 | static int gigaset_suspend(struct usb_interface *intf, pm_message_t message); | |
76 | static int gigaset_resume(struct usb_interface *intf); | |
77 | ||
78 | /* functions called before/after device reset */ | |
79 | static int gigaset_pre_reset(struct usb_interface *intf); | |
80 | static int gigaset_post_reset(struct usb_interface *intf); | |
81 | ||
06163f86 | 82 | static int atread_submit(struct cardstate *, int); |
73a88814 | 83 | static void stopurbs(struct bas_bc_state *); |
06163f86 | 84 | static int req_submit(struct bc_state *, int, int, int); |
73a88814 TS |
85 | static int atwrite_submit(struct cardstate *, unsigned char *, int); |
86 | static int start_cbsend(struct cardstate *); | |
cf7776dc | 87 | |
06163f86 | 88 | /*============================================================================*/ |
cf7776dc HL |
89 | |
90 | struct bas_cardstate { | |
784d5858 TS |
91 | struct usb_device *udev; /* USB device pointer */ |
92 | struct usb_interface *interface; /* interface for this device */ | |
cf7776dc HL |
93 | unsigned char minor; /* starting minor number */ |
94 | ||
784d5858 | 95 | struct urb *urb_ctrl; /* control pipe default URB */ |
cf7776dc HL |
96 | struct usb_ctrlrequest dr_ctrl; |
97 | struct timer_list timer_ctrl; /* control request timeout */ | |
06163f86 | 98 | int retry_ctrl; |
cf7776dc HL |
99 | |
100 | struct timer_list timer_atrdy; /* AT command ready timeout */ | |
784d5858 | 101 | struct urb *urb_cmd_out; /* for sending AT commands */ |
cf7776dc HL |
102 | struct usb_ctrlrequest dr_cmd_out; |
103 | int retry_cmd_out; | |
104 | ||
784d5858 | 105 | struct urb *urb_cmd_in; /* for receiving AT replies */ |
cf7776dc HL |
106 | struct usb_ctrlrequest dr_cmd_in; |
107 | struct timer_list timer_cmd_in; /* receive request timeout */ | |
784d5858 | 108 | unsigned char *rcvbuf; /* AT reply receive buffer */ |
cf7776dc | 109 | |
784d5858 | 110 | struct urb *urb_int_in; /* URB for interrupt pipe */ |
170ebf85 | 111 | unsigned char *int_in_buf; |
c9c0c304 TS |
112 | struct work_struct int_in_wq; /* for usb_clear_halt() */ |
113 | struct timer_list timer_int_in; /* int read retry delay */ | |
114 | int retry_int_in; | |
cf7776dc HL |
115 | |
116 | spinlock_t lock; /* locks all following */ | |
9d4bee2b | 117 | int basstate; /* bitmap (BS_*) */ |
cf7776dc | 118 | int pending; /* uncompleted base request */ |
024fd299 | 119 | wait_queue_head_t waitqueue; |
cf7776dc HL |
120 | int rcvbuf_size; /* size of AT receive buffer */ |
121 | /* 0: no receive in progress */ | |
122 | int retry_cmd_in; /* receive req retry count */ | |
123 | }; | |
124 | ||
125 | /* status of direct USB connection to 307x base (bits in basstate) */ | |
73a88814 TS |
126 | #define BS_ATOPEN 0x001 /* AT channel open */ |
127 | #define BS_B1OPEN 0x002 /* B channel 1 open */ | |
128 | #define BS_B2OPEN 0x004 /* B channel 2 open */ | |
129 | #define BS_ATREADY 0x008 /* base ready for AT command */ | |
130 | #define BS_INIT 0x010 /* base has signalled INIT_OK */ | |
131 | #define BS_ATTIMER 0x020 /* waiting for HD_READY_SEND_ATDATA */ | |
132 | #define BS_ATRDPEND 0x040 /* urb_cmd_in in use */ | |
133 | #define BS_ATWRPEND 0x080 /* urb_cmd_out in use */ | |
024fd299 | 134 | #define BS_SUSPEND 0x100 /* USB port suspended */ |
b5f581d5 | 135 | #define BS_RESETTING 0x200 /* waiting for HD_RESET_INTERRUPT_PIPE_ACK */ |
cf7776dc HL |
136 | |
137 | ||
7891adf1 | 138 | static struct gigaset_driver *driver; |
cf7776dc HL |
139 | |
140 | /* usb specific object needed to register this driver with the usb subsystem */ | |
141 | static struct usb_driver gigaset_usb_driver = { | |
142 | .name = GIGASET_MODULENAME, | |
143 | .probe = gigaset_probe, | |
144 | .disconnect = gigaset_disconnect, | |
145 | .id_table = gigaset_table, | |
024fd299 TS |
146 | .suspend = gigaset_suspend, |
147 | .resume = gigaset_resume, | |
148 | .reset_resume = gigaset_post_reset, | |
149 | .pre_reset = gigaset_pre_reset, | |
150 | .post_reset = gigaset_post_reset, | |
cf7776dc HL |
151 | }; |
152 | ||
73a88814 TS |
153 | /* get message text for usb_submit_urb return code |
154 | */ | |
155 | static char *get_usb_rcmsg(int rc) | |
156 | { | |
157 | static char unkmsg[28]; | |
158 | ||
159 | switch (rc) { | |
160 | case 0: | |
161 | return "success"; | |
162 | case -ENOMEM: | |
163 | return "out of memory"; | |
164 | case -ENODEV: | |
165 | return "device not present"; | |
166 | case -ENOENT: | |
167 | return "endpoint not present"; | |
168 | case -ENXIO: | |
169 | return "URB type not supported"; | |
170 | case -EINVAL: | |
171 | return "invalid argument"; | |
172 | case -EAGAIN: | |
173 | return "start frame too early or too much scheduled"; | |
174 | case -EFBIG: | |
bb7196d2 | 175 | return "too many isoc frames requested"; |
73a88814 TS |
176 | case -EPIPE: |
177 | return "endpoint stalled"; | |
178 | case -EMSGSIZE: | |
179 | return "invalid packet size"; | |
180 | case -ENOSPC: | |
181 | return "would overcommit USB bandwidth"; | |
182 | case -ESHUTDOWN: | |
183 | return "device shut down"; | |
184 | case -EPERM: | |
185 | return "reject flag set"; | |
186 | case -EHOSTUNREACH: | |
187 | return "device suspended"; | |
188 | default: | |
189 | snprintf(unkmsg, sizeof(unkmsg), "unknown error %d", rc); | |
190 | return unkmsg; | |
191 | } | |
192 | } | |
193 | ||
cf7776dc HL |
194 | /* get message text for USB status code |
195 | */ | |
196 | static char *get_usb_statmsg(int status) | |
197 | { | |
198 | static char unkmsg[28]; | |
199 | ||
200 | switch (status) { | |
201 | case 0: | |
202 | return "success"; | |
203 | case -ENOENT: | |
73a88814 | 204 | return "unlinked (sync)"; |
cf7776dc | 205 | case -EINPROGRESS: |
bb7196d2 | 206 | return "URB still pending"; |
cf7776dc | 207 | case -EPROTO: |
bb7196d2 | 208 | return "bitstuff error, timeout, or unknown USB error"; |
cf7776dc | 209 | case -EILSEQ: |
73a88814 | 210 | return "CRC mismatch, timeout, or unknown USB error"; |
38e2bfc9 | 211 | case -ETIME: |
bb7196d2 | 212 | return "USB response timeout"; |
73a88814 TS |
213 | case -EPIPE: |
214 | return "endpoint stalled"; | |
215 | case -ECOMM: | |
216 | return "IN buffer overrun"; | |
217 | case -ENOSR: | |
218 | return "OUT buffer underrun"; | |
219 | case -EOVERFLOW: | |
bb7196d2 | 220 | return "endpoint babble"; |
cf7776dc | 221 | case -EREMOTEIO: |
bb7196d2 | 222 | return "short packet"; |
73a88814 TS |
223 | case -ENODEV: |
224 | return "device removed"; | |
cf7776dc | 225 | case -EXDEV: |
bb7196d2 | 226 | return "partial isoc transfer"; |
cf7776dc | 227 | case -EINVAL: |
bb7196d2 | 228 | return "ISO madness"; |
73a88814 TS |
229 | case -ECONNRESET: |
230 | return "unlinked (async)"; | |
cf7776dc | 231 | case -ESHUTDOWN: |
73a88814 | 232 | return "device shut down"; |
cf7776dc | 233 | default: |
73a88814 | 234 | snprintf(unkmsg, sizeof(unkmsg), "unknown status %d", status); |
cf7776dc HL |
235 | return unkmsg; |
236 | } | |
237 | } | |
238 | ||
239 | /* usb_pipetype_str | |
240 | * retrieve string representation of USB pipe type | |
241 | */ | |
242 | static inline char *usb_pipetype_str(int pipe) | |
243 | { | |
244 | if (usb_pipeisoc(pipe)) | |
245 | return "Isoc"; | |
246 | if (usb_pipeint(pipe)) | |
247 | return "Int"; | |
248 | if (usb_pipecontrol(pipe)) | |
249 | return "Ctrl"; | |
250 | if (usb_pipebulk(pipe)) | |
251 | return "Bulk"; | |
252 | return "?"; | |
253 | } | |
254 | ||
255 | /* dump_urb | |
256 | * write content of URB to syslog for debugging | |
257 | */ | |
258 | static inline void dump_urb(enum debuglevel level, const char *tag, | |
784d5858 | 259 | struct urb *urb) |
cf7776dc HL |
260 | { |
261 | #ifdef CONFIG_GIGASET_DEBUG | |
262 | int i; | |
784d5858 | 263 | gig_dbg(level, "%s urb(0x%08lx)->{", tag, (unsigned long) urb); |
cf7776dc | 264 | if (urb) { |
784d5858 TS |
265 | gig_dbg(level, |
266 | " dev=0x%08lx, pipe=%s:EP%d/DV%d:%s, " | |
dbd98231 | 267 | "hcpriv=0x%08lx, transfer_flags=0x%x,", |
784d5858 TS |
268 | (unsigned long) urb->dev, |
269 | usb_pipetype_str(urb->pipe), | |
270 | usb_pipeendpoint(urb->pipe), usb_pipedevice(urb->pipe), | |
271 | usb_pipein(urb->pipe) ? "in" : "out", | |
dbd98231 | 272 | (unsigned long) urb->hcpriv, |
784d5858 TS |
273 | urb->transfer_flags); |
274 | gig_dbg(level, | |
275 | " transfer_buffer=0x%08lx[%d], actual_length=%d, " | |
249b061a | 276 | "setup_packet=0x%08lx,", |
784d5858 TS |
277 | (unsigned long) urb->transfer_buffer, |
278 | urb->transfer_buffer_length, urb->actual_length, | |
249b061a | 279 | (unsigned long) urb->setup_packet); |
784d5858 TS |
280 | gig_dbg(level, |
281 | " start_frame=%d, number_of_packets=%d, interval=%d, " | |
282 | "error_count=%d,", | |
283 | urb->start_frame, urb->number_of_packets, urb->interval, | |
284 | urb->error_count); | |
285 | gig_dbg(level, | |
286 | " context=0x%08lx, complete=0x%08lx, " | |
287 | "iso_frame_desc[]={", | |
288 | (unsigned long) urb->context, | |
289 | (unsigned long) urb->complete); | |
cf7776dc | 290 | for (i = 0; i < urb->number_of_packets; i++) { |
917f5085 TS |
291 | struct usb_iso_packet_descriptor *pifd |
292 | = &urb->iso_frame_desc[i]; | |
784d5858 TS |
293 | gig_dbg(level, |
294 | " {offset=%u, length=%u, actual_length=%u, " | |
295 | "status=%u}", | |
296 | pifd->offset, pifd->length, pifd->actual_length, | |
297 | pifd->status); | |
cf7776dc HL |
298 | } |
299 | } | |
784d5858 | 300 | gig_dbg(level, "}}"); |
cf7776dc HL |
301 | #endif |
302 | } | |
303 | ||
304 | /* read/set modem control bits etc. (m10x only) */ | |
305 | static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state, | |
784d5858 | 306 | unsigned new_state) |
cf7776dc HL |
307 | { |
308 | return -EINVAL; | |
309 | } | |
310 | ||
311 | static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag) | |
312 | { | |
313 | return -EINVAL; | |
314 | } | |
315 | ||
316 | static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag) | |
317 | { | |
318 | return -EINVAL; | |
319 | } | |
320 | ||
b5f581d5 TS |
321 | /* set/clear bits in base connection state, return previous state |
322 | */ | |
323 | static inline int update_basstate(struct bas_cardstate *ucs, | |
324 | int set, int clear) | |
325 | { | |
326 | unsigned long flags; | |
327 | int state; | |
328 | ||
329 | spin_lock_irqsave(&ucs->lock, flags); | |
330 | state = ucs->basstate; | |
331 | ucs->basstate = (state & ~clear) | set; | |
332 | spin_unlock_irqrestore(&ucs->lock, flags); | |
333 | return state; | |
334 | } | |
335 | ||
cf7776dc HL |
336 | /* error_hangup |
337 | * hang up any existing connection because of an unrecoverable error | |
338 | * This function may be called from any context and takes care of scheduling | |
339 | * the necessary actions for execution outside of interrupt context. | |
06163f86 | 340 | * cs->lock must not be held. |
cf7776dc HL |
341 | * argument: |
342 | * B channel control structure | |
343 | */ | |
344 | static inline void error_hangup(struct bc_state *bcs) | |
345 | { | |
346 | struct cardstate *cs = bcs->cs; | |
347 | ||
1528b18f | 348 | gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL); |
cf7776dc HL |
349 | gigaset_schedule_event(cs); |
350 | } | |
351 | ||
352 | /* error_reset | |
353 | * reset Gigaset device because of an unrecoverable error | |
06163f86 | 354 | * This function may be called from any context, and takes care of |
73a88814 | 355 | * scheduling the necessary actions for execution outside of interrupt context. |
60798c68 | 356 | * cs->hw.bas->lock must not be held. |
cf7776dc HL |
357 | * argument: |
358 | * controller state structure | |
359 | */ | |
360 | static inline void error_reset(struct cardstate *cs) | |
361 | { | |
b5f581d5 TS |
362 | /* reset interrupt pipe to recover (ignore errors) */ |
363 | update_basstate(cs->hw.bas, BS_RESETTING, 0); | |
60798c68 TS |
364 | if (req_submit(cs->bcs, HD_RESET_INTERRUPT_PIPE, 0, BAS_TIMEOUT)) |
365 | /* submission failed, escalate to USB port reset */ | |
366 | usb_queue_reset_device(cs->hw.bas->interface); | |
cf7776dc HL |
367 | } |
368 | ||
369 | /* check_pending | |
370 | * check for completion of pending control request | |
371 | * parameter: | |
784d5858 | 372 | * ucs hardware specific controller state structure |
cf7776dc HL |
373 | */ |
374 | static void check_pending(struct bas_cardstate *ucs) | |
375 | { | |
376 | unsigned long flags; | |
377 | ||
cf7776dc HL |
378 | spin_lock_irqsave(&ucs->lock, flags); |
379 | switch (ucs->pending) { | |
380 | case 0: | |
381 | break; | |
382 | case HD_OPEN_ATCHANNEL: | |
9d4bee2b | 383 | if (ucs->basstate & BS_ATOPEN) |
cf7776dc HL |
384 | ucs->pending = 0; |
385 | break; | |
386 | case HD_OPEN_B1CHANNEL: | |
9d4bee2b | 387 | if (ucs->basstate & BS_B1OPEN) |
cf7776dc HL |
388 | ucs->pending = 0; |
389 | break; | |
390 | case HD_OPEN_B2CHANNEL: | |
9d4bee2b | 391 | if (ucs->basstate & BS_B2OPEN) |
cf7776dc HL |
392 | ucs->pending = 0; |
393 | break; | |
394 | case HD_CLOSE_ATCHANNEL: | |
9d4bee2b | 395 | if (!(ucs->basstate & BS_ATOPEN)) |
cf7776dc | 396 | ucs->pending = 0; |
cf7776dc HL |
397 | break; |
398 | case HD_CLOSE_B1CHANNEL: | |
9d4bee2b | 399 | if (!(ucs->basstate & BS_B1OPEN)) |
cf7776dc HL |
400 | ucs->pending = 0; |
401 | break; | |
402 | case HD_CLOSE_B2CHANNEL: | |
9d4bee2b | 403 | if (!(ucs->basstate & BS_B2OPEN)) |
cf7776dc HL |
404 | ucs->pending = 0; |
405 | break; | |
406 | case HD_DEVICE_INIT_ACK: /* no reply expected */ | |
407 | ucs->pending = 0; | |
408 | break; | |
b5f581d5 TS |
409 | case HD_RESET_INTERRUPT_PIPE: |
410 | if (!(ucs->basstate & BS_RESETTING)) | |
411 | ucs->pending = 0; | |
412 | break; | |
413 | /* | |
414 | * HD_READ_ATMESSAGE and HD_WRITE_ATMESSAGE are handled separately | |
415 | * and should never end up here | |
cf7776dc HL |
416 | */ |
417 | default: | |
784d5858 TS |
418 | dev_warn(&ucs->interface->dev, |
419 | "unknown pending request 0x%02x cleared\n", | |
420 | ucs->pending); | |
cf7776dc HL |
421 | ucs->pending = 0; |
422 | } | |
423 | ||
424 | if (!ucs->pending) | |
425 | del_timer(&ucs->timer_ctrl); | |
426 | ||
427 | spin_unlock_irqrestore(&ucs->lock, flags); | |
428 | } | |
429 | ||
430 | /* cmd_in_timeout | |
431 | * timeout routine for command input request | |
432 | * argument: | |
433 | * controller state structure | |
434 | */ | |
435 | static void cmd_in_timeout(unsigned long data) | |
436 | { | |
437 | struct cardstate *cs = (struct cardstate *) data; | |
d48c7784 | 438 | struct bas_cardstate *ucs = cs->hw.bas; |
06163f86 | 439 | int rc; |
cf7776dc | 440 | |
cf7776dc | 441 | if (!ucs->rcvbuf_size) { |
784d5858 | 442 | gig_dbg(DEBUG_USBREQ, "%s: no receive in progress", __func__); |
cf7776dc HL |
443 | return; |
444 | } | |
cf7776dc | 445 | |
c8701a08 | 446 | if (ucs->retry_cmd_in++ >= BAS_RETRY) { |
06163f86 TS |
447 | dev_err(cs->dev, |
448 | "control read: timeout, giving up after %d tries\n", | |
449 | ucs->retry_cmd_in); | |
c8701a08 TS |
450 | kfree(ucs->rcvbuf); |
451 | ucs->rcvbuf = NULL; | |
452 | ucs->rcvbuf_size = 0; | |
453 | error_reset(cs); | |
454 | return; | |
455 | } | |
456 | ||
457 | gig_dbg(DEBUG_USBREQ, "%s: timeout, retry %d", | |
458 | __func__, ucs->retry_cmd_in); | |
459 | rc = atread_submit(cs, BAS_TIMEOUT); | |
460 | if (rc < 0) { | |
461 | kfree(ucs->rcvbuf); | |
462 | ucs->rcvbuf = NULL; | |
463 | ucs->rcvbuf_size = 0; | |
464 | if (rc != -ENODEV) | |
465 | error_reset(cs); | |
06163f86 | 466 | } |
cf7776dc HL |
467 | } |
468 | ||
06163f86 TS |
469 | /* read_ctrl_callback |
470 | * USB completion handler for control pipe input | |
471 | * called by the USB subsystem in interrupt context | |
472 | * parameter: | |
473 | * urb USB request block | |
474 | * urb->context = inbuf structure for controller state | |
475 | */ | |
7d12e780 | 476 | static void read_ctrl_callback(struct urb *urb) |
06163f86 TS |
477 | { |
478 | struct inbuf_t *inbuf = urb->context; | |
479 | struct cardstate *cs = inbuf->cs; | |
480 | struct bas_cardstate *ucs = cs->hw.bas; | |
dbd98231 | 481 | int status = urb->status; |
06163f86 TS |
482 | unsigned numbytes; |
483 | int rc; | |
484 | ||
485 | update_basstate(ucs, 0, BS_ATRDPEND); | |
024fd299 | 486 | wake_up(&ucs->waitqueue); |
06163f86 TS |
487 | del_timer(&ucs->timer_cmd_in); |
488 | ||
dbd98231 | 489 | switch (status) { |
06163f86 TS |
490 | case 0: /* normal completion */ |
491 | numbytes = urb->actual_length; | |
492 | if (unlikely(numbytes != ucs->rcvbuf_size)) { | |
493 | dev_warn(cs->dev, | |
494 | "control read: received %d chars, expected %d\n", | |
495 | numbytes, ucs->rcvbuf_size); | |
496 | if (numbytes > ucs->rcvbuf_size) | |
497 | numbytes = ucs->rcvbuf_size; | |
498 | } | |
499 | ||
c8701a08 TS |
500 | /* copy received bytes to inbuf, notify event layer */ |
501 | if (gigaset_fill_inbuf(inbuf, ucs->rcvbuf, numbytes)) { | |
502 | gig_dbg(DEBUG_INTR, "%s-->BH", __func__); | |
503 | gigaset_schedule_event(cs); | |
06163f86 TS |
504 | } |
505 | break; | |
506 | ||
507 | case -ENOENT: /* cancelled */ | |
508 | case -ECONNRESET: /* cancelled (async) */ | |
509 | case -EINPROGRESS: /* pending */ | |
510 | case -ENODEV: /* device removed */ | |
511 | case -ESHUTDOWN: /* device shut down */ | |
c8701a08 | 512 | /* no further action necessary */ |
06163f86 | 513 | gig_dbg(DEBUG_USBREQ, "%s: %s", |
dbd98231 | 514 | __func__, get_usb_statmsg(status)); |
06163f86 TS |
515 | break; |
516 | ||
c8701a08 | 517 | default: /* other errors: retry */ |
06163f86 | 518 | if (ucs->retry_cmd_in++ < BAS_RETRY) { |
c8701a08 TS |
519 | gig_dbg(DEBUG_USBREQ, "%s: %s, retry %d", __func__, |
520 | get_usb_statmsg(status), ucs->retry_cmd_in); | |
06163f86 | 521 | rc = atread_submit(cs, BAS_TIMEOUT); |
c8701a08 TS |
522 | if (rc >= 0) |
523 | /* successfully resubmitted, skip freeing */ | |
06163f86 | 524 | return; |
c8701a08 TS |
525 | if (rc == -ENODEV) |
526 | /* disconnect, no further action necessary */ | |
527 | break; | |
06163f86 | 528 | } |
c8701a08 TS |
529 | dev_err(cs->dev, "control read: %s, giving up after %d tries\n", |
530 | get_usb_statmsg(status), ucs->retry_cmd_in); | |
06163f86 TS |
531 | error_reset(cs); |
532 | } | |
533 | ||
c8701a08 | 534 | /* read finished, free buffer */ |
06163f86 TS |
535 | kfree(ucs->rcvbuf); |
536 | ucs->rcvbuf = NULL; | |
537 | ucs->rcvbuf_size = 0; | |
06163f86 TS |
538 | } |
539 | ||
cf7776dc | 540 | /* atread_submit |
73a88814 | 541 | * submit an HD_READ_ATMESSAGE command URB and optionally start a timeout |
cf7776dc HL |
542 | * parameters: |
543 | * cs controller state structure | |
544 | * timeout timeout in 1/10 sec., 0: none | |
545 | * return value: | |
546 | * 0 on success | |
cf7776dc HL |
547 | * -EBUSY if another request is pending |
548 | * any URB submission error code | |
549 | */ | |
550 | static int atread_submit(struct cardstate *cs, int timeout) | |
551 | { | |
d48c7784 | 552 | struct bas_cardstate *ucs = cs->hw.bas; |
024fd299 | 553 | int basstate; |
cf7776dc HL |
554 | int ret; |
555 | ||
784d5858 TS |
556 | gig_dbg(DEBUG_USBREQ, "-------> HD_READ_ATMESSAGE (%d)", |
557 | ucs->rcvbuf_size); | |
cf7776dc | 558 | |
024fd299 TS |
559 | basstate = update_basstate(ucs, BS_ATRDPEND, 0); |
560 | if (basstate & BS_ATRDPEND) { | |
784d5858 TS |
561 | dev_err(cs->dev, |
562 | "could not submit HD_READ_ATMESSAGE: URB busy\n"); | |
cf7776dc HL |
563 | return -EBUSY; |
564 | } | |
565 | ||
024fd299 TS |
566 | if (basstate & BS_SUSPEND) { |
567 | dev_notice(cs->dev, | |
568 | "HD_READ_ATMESSAGE not submitted, " | |
569 | "suspend in progress\n"); | |
570 | update_basstate(ucs, 0, BS_ATRDPEND); | |
571 | /* treat like disconnect */ | |
572 | return -ENODEV; | |
573 | } | |
574 | ||
cf7776dc HL |
575 | ucs->dr_cmd_in.bRequestType = IN_VENDOR_REQ; |
576 | ucs->dr_cmd_in.bRequest = HD_READ_ATMESSAGE; | |
577 | ucs->dr_cmd_in.wValue = 0; | |
578 | ucs->dr_cmd_in.wIndex = 0; | |
579 | ucs->dr_cmd_in.wLength = cpu_to_le16(ucs->rcvbuf_size); | |
580 | usb_fill_control_urb(ucs->urb_cmd_in, ucs->udev, | |
784d5858 | 581 | usb_rcvctrlpipe(ucs->udev, 0), |
7891adf1 | 582 | (unsigned char *) &ucs->dr_cmd_in, |
784d5858 TS |
583 | ucs->rcvbuf, ucs->rcvbuf_size, |
584 | read_ctrl_callback, cs->inbuf); | |
cf7776dc | 585 | |
7891adf1 TS |
586 | ret = usb_submit_urb(ucs->urb_cmd_in, GFP_ATOMIC); |
587 | if (ret != 0) { | |
73a88814 | 588 | update_basstate(ucs, 0, BS_ATRDPEND); |
784d5858 | 589 | dev_err(cs->dev, "could not submit HD_READ_ATMESSAGE: %s\n", |
06163f86 | 590 | get_usb_rcmsg(ret)); |
cf7776dc HL |
591 | return ret; |
592 | } | |
593 | ||
594 | if (timeout > 0) { | |
784d5858 | 595 | gig_dbg(DEBUG_USBREQ, "setting timeout of %d/10 secs", timeout); |
1d5a9edc | 596 | mod_timer(&ucs->timer_cmd_in, jiffies + timeout * HZ / 10); |
cf7776dc HL |
597 | } |
598 | return 0; | |
599 | } | |
600 | ||
c9c0c304 TS |
601 | /* int_in_work |
602 | * workqueue routine to clear halt on interrupt in endpoint | |
603 | */ | |
604 | ||
605 | static void int_in_work(struct work_struct *work) | |
606 | { | |
607 | struct bas_cardstate *ucs = | |
608 | container_of(work, struct bas_cardstate, int_in_wq); | |
609 | struct urb *urb = ucs->urb_int_in; | |
610 | struct cardstate *cs = urb->context; | |
611 | int rc; | |
612 | ||
613 | /* clear halt condition */ | |
614 | rc = usb_clear_halt(ucs->udev, urb->pipe); | |
615 | gig_dbg(DEBUG_USBREQ, "clear_halt: %s", get_usb_rcmsg(rc)); | |
616 | if (rc == 0) | |
617 | /* success, resubmit interrupt read URB */ | |
618 | rc = usb_submit_urb(urb, GFP_ATOMIC); | |
619 | if (rc != 0 && rc != -ENODEV) { | |
620 | dev_err(cs->dev, "clear halt failed: %s\n", get_usb_rcmsg(rc)); | |
621 | rc = usb_lock_device_for_reset(ucs->udev, ucs->interface); | |
622 | if (rc == 0) { | |
623 | rc = usb_reset_device(ucs->udev); | |
624 | usb_unlock_device(ucs->udev); | |
625 | } | |
626 | } | |
627 | ucs->retry_int_in = 0; | |
628 | } | |
629 | ||
630 | /* int_in_resubmit | |
631 | * timer routine for interrupt read delayed resubmit | |
632 | * argument: | |
633 | * controller state structure | |
634 | */ | |
635 | static void int_in_resubmit(unsigned long data) | |
636 | { | |
637 | struct cardstate *cs = (struct cardstate *) data; | |
638 | struct bas_cardstate *ucs = cs->hw.bas; | |
639 | int rc; | |
640 | ||
641 | if (ucs->retry_int_in++ >= BAS_RETRY) { | |
642 | dev_err(cs->dev, "interrupt read: giving up after %d tries\n", | |
643 | ucs->retry_int_in); | |
644 | usb_queue_reset_device(ucs->interface); | |
645 | return; | |
646 | } | |
647 | ||
648 | gig_dbg(DEBUG_USBREQ, "%s: retry %d", __func__, ucs->retry_int_in); | |
649 | rc = usb_submit_urb(ucs->urb_int_in, GFP_ATOMIC); | |
650 | if (rc != 0 && rc != -ENODEV) { | |
651 | dev_err(cs->dev, "could not resubmit interrupt URB: %s\n", | |
652 | get_usb_rcmsg(rc)); | |
653 | usb_queue_reset_device(ucs->interface); | |
654 | } | |
655 | } | |
656 | ||
cf7776dc HL |
657 | /* read_int_callback |
658 | * USB completion handler for interrupt pipe input | |
659 | * called by the USB subsystem in interrupt context | |
660 | * parameter: | |
661 | * urb USB request block | |
662 | * urb->context = controller state structure | |
663 | */ | |
7d12e780 | 664 | static void read_int_callback(struct urb *urb) |
cf7776dc | 665 | { |
d48c7784 TS |
666 | struct cardstate *cs = urb->context; |
667 | struct bas_cardstate *ucs = cs->hw.bas; | |
cf7776dc | 668 | struct bc_state *bcs; |
dbd98231 | 669 | int status = urb->status; |
cf7776dc | 670 | unsigned long flags; |
73a88814 | 671 | int rc; |
cf7776dc HL |
672 | unsigned l; |
673 | int channel; | |
674 | ||
dbd98231 | 675 | switch (status) { |
cf7776dc | 676 | case 0: /* success */ |
c9c0c304 | 677 | ucs->retry_int_in = 0; |
cf7776dc | 678 | break; |
c9c0c304 TS |
679 | case -EPIPE: /* endpoint stalled */ |
680 | schedule_work(&ucs->int_in_wq); | |
681 | /* fall through */ | |
73a88814 TS |
682 | case -ENOENT: /* cancelled */ |
683 | case -ECONNRESET: /* cancelled (async) */ | |
cf7776dc | 684 | case -EINPROGRESS: /* pending */ |
c9c0c304 TS |
685 | case -ENODEV: /* device removed */ |
686 | case -ESHUTDOWN: /* device shut down */ | |
687 | /* no further action necessary */ | |
784d5858 | 688 | gig_dbg(DEBUG_USBREQ, "%s: %s", |
dbd98231 | 689 | __func__, get_usb_statmsg(status)); |
cf7776dc | 690 | return; |
c9c0c304 TS |
691 | case -EPROTO: /* protocol error or unplug */ |
692 | case -EILSEQ: | |
693 | case -ETIME: | |
694 | /* resubmit after delay */ | |
695 | gig_dbg(DEBUG_USBREQ, "%s: %s", | |
696 | __func__, get_usb_statmsg(status)); | |
697 | mod_timer(&ucs->timer_int_in, jiffies + HZ / 10); | |
73a88814 | 698 | return; |
c9c0c304 | 699 | default: /* other errors: just resubmit */ |
784d5858 | 700 | dev_warn(cs->dev, "interrupt read: %s\n", |
dbd98231 | 701 | get_usb_statmsg(status)); |
cf7776dc HL |
702 | goto resubmit; |
703 | } | |
704 | ||
73a88814 | 705 | /* drop incomplete packets even if the missing bytes wouldn't matter */ |
170ebf85 | 706 | if (unlikely(urb->actual_length < IP_MSGSIZE)) { |
73a88814 TS |
707 | dev_warn(cs->dev, "incomplete interrupt packet (%d bytes)\n", |
708 | urb->actual_length); | |
709 | goto resubmit; | |
710 | } | |
711 | ||
cf7776dc HL |
712 | l = (unsigned) ucs->int_in_buf[1] + |
713 | (((unsigned) ucs->int_in_buf[2]) << 8); | |
714 | ||
784d5858 TS |
715 | gig_dbg(DEBUG_USBREQ, "<-------%d: 0x%02x (%u [0x%02x 0x%02x])", |
716 | urb->actual_length, (int)ucs->int_in_buf[0], l, | |
717 | (int)ucs->int_in_buf[1], (int)ucs->int_in_buf[2]); | |
cf7776dc HL |
718 | |
719 | channel = 0; | |
720 | ||
721 | switch (ucs->int_in_buf[0]) { | |
722 | case HD_DEVICE_INIT_OK: | |
723 | update_basstate(ucs, BS_INIT, 0); | |
724 | break; | |
725 | ||
726 | case HD_READY_SEND_ATDATA: | |
727 | del_timer(&ucs->timer_atrdy); | |
728 | update_basstate(ucs, BS_ATREADY, BS_ATTIMER); | |
729 | start_cbsend(cs); | |
730 | break; | |
731 | ||
732 | case HD_OPEN_B2CHANNEL_ACK: | |
733 | ++channel; | |
734 | case HD_OPEN_B1CHANNEL_ACK: | |
735 | bcs = cs->bcs + channel; | |
736 | update_basstate(ucs, BS_B1OPEN << channel, 0); | |
737 | gigaset_bchannel_up(bcs); | |
738 | break; | |
739 | ||
740 | case HD_OPEN_ATCHANNEL_ACK: | |
741 | update_basstate(ucs, BS_ATOPEN, 0); | |
742 | start_cbsend(cs); | |
743 | break; | |
744 | ||
745 | case HD_CLOSE_B2CHANNEL_ACK: | |
746 | ++channel; | |
747 | case HD_CLOSE_B1CHANNEL_ACK: | |
748 | bcs = cs->bcs + channel; | |
749 | update_basstate(ucs, 0, BS_B1OPEN << channel); | |
750 | stopurbs(bcs->hw.bas); | |
751 | gigaset_bchannel_down(bcs); | |
752 | break; | |
753 | ||
754 | case HD_CLOSE_ATCHANNEL_ACK: | |
755 | update_basstate(ucs, 0, BS_ATOPEN); | |
756 | break; | |
757 | ||
758 | case HD_B2_FLOW_CONTROL: | |
759 | ++channel; | |
760 | case HD_B1_FLOW_CONTROL: | |
761 | bcs = cs->bcs + channel; | |
762 | atomic_add((l - BAS_NORMFRAME) * BAS_CORRFRAMES, | |
784d5858 TS |
763 | &bcs->hw.bas->corrbytes); |
764 | gig_dbg(DEBUG_ISO, | |
765 | "Flow control (channel %d, sub %d): 0x%02x => %d", | |
766 | channel, bcs->hw.bas->numsub, l, | |
767 | atomic_read(&bcs->hw.bas->corrbytes)); | |
cf7776dc HL |
768 | break; |
769 | ||
770 | case HD_RECEIVEATDATA_ACK: /* AT response ready to be received */ | |
771 | if (!l) { | |
784d5858 TS |
772 | dev_warn(cs->dev, |
773 | "HD_RECEIVEATDATA_ACK with length 0 ignored\n"); | |
cf7776dc HL |
774 | break; |
775 | } | |
776 | spin_lock_irqsave(&cs->lock, flags); | |
c9c0c304 TS |
777 | if (ucs->basstate & BS_ATRDPEND) { |
778 | spin_unlock_irqrestore(&cs->lock, flags); | |
779 | dev_warn(cs->dev, | |
780 | "HD_RECEIVEATDATA_ACK(%d) during HD_READ_ATMESSAGE(%d) ignored\n", | |
781 | l, ucs->rcvbuf_size); | |
782 | break; | |
783 | } | |
cf7776dc | 784 | if (ucs->rcvbuf_size) { |
73a88814 | 785 | /* throw away previous buffer - we have no queue */ |
784d5858 | 786 | dev_err(cs->dev, |
73a88814 TS |
787 | "receive AT data overrun, %d bytes lost\n", |
788 | ucs->rcvbuf_size); | |
789 | kfree(ucs->rcvbuf); | |
790 | ucs->rcvbuf_size = 0; | |
cf7776dc | 791 | } |
7891adf1 TS |
792 | ucs->rcvbuf = kmalloc(l, GFP_ATOMIC); |
793 | if (ucs->rcvbuf == NULL) { | |
cf7776dc | 794 | spin_unlock_irqrestore(&cs->lock, flags); |
73a88814 | 795 | dev_err(cs->dev, "out of memory receiving AT data\n"); |
cf7776dc HL |
796 | break; |
797 | } | |
798 | ucs->rcvbuf_size = l; | |
799 | ucs->retry_cmd_in = 0; | |
7891adf1 TS |
800 | rc = atread_submit(cs, BAS_TIMEOUT); |
801 | if (rc < 0) { | |
cf7776dc HL |
802 | kfree(ucs->rcvbuf); |
803 | ucs->rcvbuf = NULL; | |
804 | ucs->rcvbuf_size = 0; | |
cf7776dc HL |
805 | } |
806 | spin_unlock_irqrestore(&cs->lock, flags); | |
c9c0c304 TS |
807 | if (rc < 0 && rc != -ENODEV) |
808 | error_reset(cs); | |
cf7776dc HL |
809 | break; |
810 | ||
811 | case HD_RESET_INTERRUPT_PIPE_ACK: | |
b5f581d5 TS |
812 | update_basstate(ucs, 0, BS_RESETTING); |
813 | dev_notice(cs->dev, "interrupt pipe reset\n"); | |
cf7776dc HL |
814 | break; |
815 | ||
816 | case HD_SUSPEND_END: | |
784d5858 | 817 | gig_dbg(DEBUG_USBREQ, "HD_SUSPEND_END"); |
cf7776dc HL |
818 | break; |
819 | ||
820 | default: | |
784d5858 TS |
821 | dev_warn(cs->dev, |
822 | "unknown Gigaset signal 0x%02x (%u) ignored\n", | |
823 | (int) ucs->int_in_buf[0], l); | |
cf7776dc HL |
824 | } |
825 | ||
826 | check_pending(ucs); | |
024fd299 | 827 | wake_up(&ucs->waitqueue); |
cf7776dc HL |
828 | |
829 | resubmit: | |
54e6ecb2 | 830 | rc = usb_submit_urb(urb, GFP_ATOMIC); |
73a88814 | 831 | if (unlikely(rc != 0 && rc != -ENODEV)) { |
784d5858 | 832 | dev_err(cs->dev, "could not resubmit interrupt URB: %s\n", |
73a88814 | 833 | get_usb_rcmsg(rc)); |
cf7776dc HL |
834 | error_reset(cs); |
835 | } | |
836 | } | |
837 | ||
cf7776dc HL |
838 | /* read_iso_callback |
839 | * USB completion handler for B channel isochronous input | |
840 | * called by the USB subsystem in interrupt context | |
841 | * parameter: | |
842 | * urb USB request block of completed request | |
843 | * urb->context = bc_state structure | |
844 | */ | |
7d12e780 | 845 | static void read_iso_callback(struct urb *urb) |
cf7776dc HL |
846 | { |
847 | struct bc_state *bcs; | |
848 | struct bas_bc_state *ubc; | |
dbd98231 | 849 | int status = urb->status; |
cf7776dc HL |
850 | unsigned long flags; |
851 | int i, rc; | |
852 | ||
cf7776dc | 853 | /* status codes not worth bothering the tasklet with */ |
dbd98231 TS |
854 | if (unlikely(status == -ENOENT || |
855 | status == -ECONNRESET || | |
856 | status == -EINPROGRESS || | |
857 | status == -ENODEV || | |
858 | status == -ESHUTDOWN)) { | |
784d5858 | 859 | gig_dbg(DEBUG_ISO, "%s: %s", |
dbd98231 | 860 | __func__, get_usb_statmsg(status)); |
cf7776dc HL |
861 | return; |
862 | } | |
863 | ||
d48c7784 | 864 | bcs = urb->context; |
cf7776dc | 865 | ubc = bcs->hw.bas; |
cf7776dc HL |
866 | |
867 | spin_lock_irqsave(&ubc->isoinlock, flags); | |
868 | if (likely(ubc->isoindone == NULL)) { | |
869 | /* pass URB to tasklet */ | |
870 | ubc->isoindone = urb; | |
dbd98231 | 871 | ubc->isoinstatus = status; |
368fd81d | 872 | tasklet_hi_schedule(&ubc->rcvd_tasklet); |
cf7776dc HL |
873 | } else { |
874 | /* tasklet still busy, drop data and resubmit URB */ | |
bb7196d2 | 875 | gig_dbg(DEBUG_ISO, "%s: overrun", __func__); |
dbd98231 | 876 | ubc->loststatus = status; |
cf7776dc HL |
877 | for (i = 0; i < BAS_NUMFRAMES; i++) { |
878 | ubc->isoinlost += urb->iso_frame_desc[i].actual_length; | |
879 | if (unlikely(urb->iso_frame_desc[i].status != 0 && | |
73a88814 TS |
880 | urb->iso_frame_desc[i].status != |
881 | -EINPROGRESS)) | |
cf7776dc | 882 | ubc->loststatus = urb->iso_frame_desc[i].status; |
cf7776dc HL |
883 | urb->iso_frame_desc[i].status = 0; |
884 | urb->iso_frame_desc[i].actual_length = 0; | |
885 | } | |
9d4bee2b | 886 | if (likely(ubc->running)) { |
784d5858 TS |
887 | /* urb->dev is clobbered by USB subsystem */ |
888 | urb->dev = bcs->cs->hw.bas->udev; | |
cf7776dc HL |
889 | urb->transfer_flags = URB_ISO_ASAP; |
890 | urb->number_of_packets = BAS_NUMFRAMES; | |
54e6ecb2 | 891 | rc = usb_submit_urb(urb, GFP_ATOMIC); |
73a88814 | 892 | if (unlikely(rc != 0 && rc != -ENODEV)) { |
784d5858 | 893 | dev_err(bcs->cs->dev, |
bb7196d2 TS |
894 | "could not resubmit isoc read URB: %s\n", |
895 | get_usb_rcmsg(rc)); | |
cf7776dc HL |
896 | dump_urb(DEBUG_ISO, "isoc read", urb); |
897 | error_hangup(bcs); | |
898 | } | |
899 | } | |
900 | } | |
901 | spin_unlock_irqrestore(&ubc->isoinlock, flags); | |
902 | } | |
903 | ||
904 | /* write_iso_callback | |
905 | * USB completion handler for B channel isochronous output | |
906 | * called by the USB subsystem in interrupt context | |
907 | * parameter: | |
908 | * urb USB request block of completed request | |
909 | * urb->context = isow_urbctx_t structure | |
910 | */ | |
7d12e780 | 911 | static void write_iso_callback(struct urb *urb) |
cf7776dc HL |
912 | { |
913 | struct isow_urbctx_t *ucx; | |
914 | struct bas_bc_state *ubc; | |
dbd98231 | 915 | int status = urb->status; |
cf7776dc HL |
916 | unsigned long flags; |
917 | ||
cf7776dc | 918 | /* status codes not worth bothering the tasklet with */ |
dbd98231 TS |
919 | if (unlikely(status == -ENOENT || |
920 | status == -ECONNRESET || | |
921 | status == -EINPROGRESS || | |
922 | status == -ENODEV || | |
923 | status == -ESHUTDOWN)) { | |
784d5858 | 924 | gig_dbg(DEBUG_ISO, "%s: %s", |
dbd98231 | 925 | __func__, get_usb_statmsg(status)); |
cf7776dc HL |
926 | return; |
927 | } | |
928 | ||
929 | /* pass URB context to tasklet */ | |
d48c7784 | 930 | ucx = urb->context; |
cf7776dc | 931 | ubc = ucx->bcs->hw.bas; |
dbd98231 | 932 | ucx->status = status; |
cf7776dc HL |
933 | |
934 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
935 | ubc->isooutovfl = ubc->isooutdone; | |
936 | ubc->isooutdone = ucx; | |
937 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
368fd81d | 938 | tasklet_hi_schedule(&ubc->sent_tasklet); |
cf7776dc HL |
939 | } |
940 | ||
941 | /* starturbs | |
942 | * prepare and submit USB request blocks for isochronous input and output | |
943 | * argument: | |
944 | * B channel control structure | |
945 | * return value: | |
946 | * 0 on success | |
947 | * < 0 on error (no URBs submitted) | |
948 | */ | |
949 | static int starturbs(struct bc_state *bcs) | |
950 | { | |
d48c7784 | 951 | struct bas_bc_state *ubc = bcs->hw.bas; |
cf7776dc | 952 | struct urb *urb; |
cf7776dc HL |
953 | int j, k; |
954 | int rc; | |
955 | ||
cf7776dc | 956 | /* initialize L2 reception */ |
088ec0cc | 957 | if (bcs->proto2 == L2_HDLC) |
cf7776dc HL |
958 | bcs->inputstate |= INS_flag_hunt; |
959 | ||
960 | /* submit all isochronous input URBs */ | |
9d4bee2b | 961 | ubc->running = 1; |
cf7776dc HL |
962 | for (k = 0; k < BAS_INURBS; k++) { |
963 | urb = ubc->isoinurbs[k]; | |
964 | if (!urb) { | |
cf7776dc HL |
965 | rc = -EFAULT; |
966 | goto error; | |
967 | } | |
968 | ||
969 | urb->dev = bcs->cs->hw.bas->udev; | |
970 | urb->pipe = usb_rcvisocpipe(urb->dev, 3 + 2 * bcs->channel); | |
971 | urb->transfer_flags = URB_ISO_ASAP; | |
972 | urb->transfer_buffer = ubc->isoinbuf + k * BAS_INBUFSIZE; | |
973 | urb->transfer_buffer_length = BAS_INBUFSIZE; | |
974 | urb->number_of_packets = BAS_NUMFRAMES; | |
975 | urb->interval = BAS_FRAMETIME; | |
976 | urb->complete = read_iso_callback; | |
977 | urb->context = bcs; | |
978 | for (j = 0; j < BAS_NUMFRAMES; j++) { | |
979 | urb->iso_frame_desc[j].offset = j * BAS_MAXFRAME; | |
980 | urb->iso_frame_desc[j].length = BAS_MAXFRAME; | |
981 | urb->iso_frame_desc[j].status = 0; | |
982 | urb->iso_frame_desc[j].actual_length = 0; | |
983 | } | |
984 | ||
985 | dump_urb(DEBUG_ISO, "Initial isoc read", urb); | |
7891adf1 TS |
986 | rc = usb_submit_urb(urb, GFP_ATOMIC); |
987 | if (rc != 0) | |
cf7776dc | 988 | goto error; |
cf7776dc HL |
989 | } |
990 | ||
991 | /* initialize L2 transmission */ | |
992 | gigaset_isowbuf_init(ubc->isooutbuf, PPP_FLAG); | |
993 | ||
994 | /* set up isochronous output URBs for flag idling */ | |
995 | for (k = 0; k < BAS_OUTURBS; ++k) { | |
996 | urb = ubc->isoouturbs[k].urb; | |
997 | if (!urb) { | |
cf7776dc HL |
998 | rc = -EFAULT; |
999 | goto error; | |
1000 | } | |
1001 | urb->dev = bcs->cs->hw.bas->udev; | |
1002 | urb->pipe = usb_sndisocpipe(urb->dev, 4 + 2 * bcs->channel); | |
1003 | urb->transfer_flags = URB_ISO_ASAP; | |
1004 | urb->transfer_buffer = ubc->isooutbuf->data; | |
1005 | urb->transfer_buffer_length = sizeof(ubc->isooutbuf->data); | |
1006 | urb->number_of_packets = BAS_NUMFRAMES; | |
1007 | urb->interval = BAS_FRAMETIME; | |
1008 | urb->complete = write_iso_callback; | |
1009 | urb->context = &ubc->isoouturbs[k]; | |
1010 | for (j = 0; j < BAS_NUMFRAMES; ++j) { | |
1011 | urb->iso_frame_desc[j].offset = BAS_OUTBUFSIZE; | |
1012 | urb->iso_frame_desc[j].length = BAS_NORMFRAME; | |
1013 | urb->iso_frame_desc[j].status = 0; | |
1014 | urb->iso_frame_desc[j].actual_length = 0; | |
1015 | } | |
1016 | ubc->isoouturbs[k].limit = -1; | |
1017 | } | |
1018 | ||
c652cbd8 TS |
1019 | /* keep one URB free, submit the others */ |
1020 | for (k = 0; k < BAS_OUTURBS-1; ++k) { | |
cf7776dc | 1021 | dump_urb(DEBUG_ISO, "Initial isoc write", urb); |
54e6ecb2 | 1022 | rc = usb_submit_urb(ubc->isoouturbs[k].urb, GFP_ATOMIC); |
73a88814 | 1023 | if (rc != 0) |
cf7776dc | 1024 | goto error; |
cf7776dc HL |
1025 | } |
1026 | dump_urb(DEBUG_ISO, "Initial isoc write (free)", urb); | |
c652cbd8 | 1027 | ubc->isooutfree = &ubc->isoouturbs[BAS_OUTURBS-1]; |
cf7776dc HL |
1028 | ubc->isooutdone = ubc->isooutovfl = NULL; |
1029 | return 0; | |
1030 | error: | |
1031 | stopurbs(ubc); | |
1032 | return rc; | |
1033 | } | |
1034 | ||
1035 | /* stopurbs | |
1036 | * cancel the USB request blocks for isochronous input and output | |
1037 | * errors are silently ignored | |
1038 | * argument: | |
1039 | * B channel control structure | |
1040 | */ | |
1041 | static void stopurbs(struct bas_bc_state *ubc) | |
1042 | { | |
1043 | int k, rc; | |
1044 | ||
9d4bee2b | 1045 | ubc->running = 0; |
cf7776dc HL |
1046 | |
1047 | for (k = 0; k < BAS_INURBS; ++k) { | |
1048 | rc = usb_unlink_urb(ubc->isoinurbs[k]); | |
784d5858 | 1049 | gig_dbg(DEBUG_ISO, |
73a88814 TS |
1050 | "%s: isoc input URB %d unlinked, result = %s", |
1051 | __func__, k, get_usb_rcmsg(rc)); | |
cf7776dc HL |
1052 | } |
1053 | ||
1054 | for (k = 0; k < BAS_OUTURBS; ++k) { | |
1055 | rc = usb_unlink_urb(ubc->isoouturbs[k].urb); | |
784d5858 | 1056 | gig_dbg(DEBUG_ISO, |
73a88814 TS |
1057 | "%s: isoc output URB %d unlinked, result = %s", |
1058 | __func__, k, get_usb_rcmsg(rc)); | |
cf7776dc HL |
1059 | } |
1060 | } | |
1061 | ||
1062 | /* Isochronous Write - Bottom Half */ | |
1063 | /* =============================== */ | |
1064 | ||
1065 | /* submit_iso_write_urb | |
1066 | * fill and submit the next isochronous write URB | |
1067 | * parameters: | |
73a88814 | 1068 | * ucx context structure containing URB |
cf7776dc HL |
1069 | * return value: |
1070 | * number of frames submitted in URB | |
1071 | * 0 if URB not submitted because no data available (isooutbuf busy) | |
1072 | * error code < 0 on error | |
1073 | */ | |
1074 | static int submit_iso_write_urb(struct isow_urbctx_t *ucx) | |
1075 | { | |
d48c7784 TS |
1076 | struct urb *urb = ucx->urb; |
1077 | struct bas_bc_state *ubc = ucx->bcs->hw.bas; | |
cf7776dc HL |
1078 | struct usb_iso_packet_descriptor *ifd; |
1079 | int corrbytes, nframe, rc; | |
1080 | ||
784d5858 TS |
1081 | /* urb->dev is clobbered by USB subsystem */ |
1082 | urb->dev = ucx->bcs->cs->hw.bas->udev; | |
cf7776dc HL |
1083 | urb->transfer_flags = URB_ISO_ASAP; |
1084 | urb->transfer_buffer = ubc->isooutbuf->data; | |
1085 | urb->transfer_buffer_length = sizeof(ubc->isooutbuf->data); | |
1086 | ||
1087 | for (nframe = 0; nframe < BAS_NUMFRAMES; nframe++) { | |
1088 | ifd = &urb->iso_frame_desc[nframe]; | |
1089 | ||
1090 | /* compute frame length according to flow control */ | |
1091 | ifd->length = BAS_NORMFRAME; | |
7891adf1 TS |
1092 | corrbytes = atomic_read(&ubc->corrbytes); |
1093 | if (corrbytes != 0) { | |
784d5858 TS |
1094 | gig_dbg(DEBUG_ISO, "%s: corrbytes=%d", |
1095 | __func__, corrbytes); | |
cf7776dc HL |
1096 | if (corrbytes > BAS_HIGHFRAME - BAS_NORMFRAME) |
1097 | corrbytes = BAS_HIGHFRAME - BAS_NORMFRAME; | |
1098 | else if (corrbytes < BAS_LOWFRAME - BAS_NORMFRAME) | |
1099 | corrbytes = BAS_LOWFRAME - BAS_NORMFRAME; | |
1100 | ifd->length += corrbytes; | |
1101 | atomic_add(-corrbytes, &ubc->corrbytes); | |
1102 | } | |
cf7776dc HL |
1103 | |
1104 | /* retrieve block of data to send */ | |
5f09c4c7 TS |
1105 | rc = gigaset_isowbuf_getbytes(ubc->isooutbuf, ifd->length); |
1106 | if (rc < 0) { | |
1107 | if (rc == -EBUSY) { | |
784d5858 TS |
1108 | gig_dbg(DEBUG_ISO, |
1109 | "%s: buffer busy at frame %d", | |
1110 | __func__, nframe); | |
1111 | /* tasklet will be restarted from | |
088ec0cc | 1112 | gigaset_isoc_send_skb() */ |
cf7776dc | 1113 | } else { |
784d5858 TS |
1114 | dev_err(ucx->bcs->cs->dev, |
1115 | "%s: buffer error %d at frame %d\n", | |
5f09c4c7 TS |
1116 | __func__, rc, nframe); |
1117 | return rc; | |
cf7776dc HL |
1118 | } |
1119 | break; | |
1120 | } | |
5f09c4c7 | 1121 | ifd->offset = rc; |
9d4bee2b | 1122 | ucx->limit = ubc->isooutbuf->nextread; |
cf7776dc HL |
1123 | ifd->status = 0; |
1124 | ifd->actual_length = 0; | |
1125 | } | |
73a88814 TS |
1126 | if (unlikely(nframe == 0)) |
1127 | return 0; /* no data to send */ | |
1128 | urb->number_of_packets = nframe; | |
69049cc8 | 1129 | |
54e6ecb2 | 1130 | rc = usb_submit_urb(urb, GFP_ATOMIC); |
73a88814 TS |
1131 | if (unlikely(rc)) { |
1132 | if (rc == -ENODEV) | |
1133 | /* device removed - give up silently */ | |
1134 | gig_dbg(DEBUG_ISO, "%s: disconnected", __func__); | |
1135 | else | |
784d5858 | 1136 | dev_err(ucx->bcs->cs->dev, |
bb7196d2 | 1137 | "could not submit isoc write URB: %s\n", |
73a88814 TS |
1138 | get_usb_rcmsg(rc)); |
1139 | return rc; | |
cf7776dc | 1140 | } |
73a88814 | 1141 | ++ubc->numsub; |
cf7776dc HL |
1142 | return nframe; |
1143 | } | |
1144 | ||
1145 | /* write_iso_tasklet | |
1146 | * tasklet scheduled when an isochronous output URB from the Gigaset device | |
1147 | * has completed | |
1148 | * parameter: | |
1149 | * data B channel state structure | |
1150 | */ | |
1151 | static void write_iso_tasklet(unsigned long data) | |
1152 | { | |
d48c7784 TS |
1153 | struct bc_state *bcs = (struct bc_state *) data; |
1154 | struct bas_bc_state *ubc = bcs->hw.bas; | |
1155 | struct cardstate *cs = bcs->cs; | |
cf7776dc HL |
1156 | struct isow_urbctx_t *done, *next, *ovfl; |
1157 | struct urb *urb; | |
dbd98231 | 1158 | int status; |
cf7776dc HL |
1159 | struct usb_iso_packet_descriptor *ifd; |
1160 | int offset; | |
1161 | unsigned long flags; | |
1162 | int i; | |
1163 | struct sk_buff *skb; | |
1164 | int len; | |
73a88814 | 1165 | int rc; |
cf7776dc | 1166 | |
cf7776dc HL |
1167 | /* loop while completed URBs arrive in time */ |
1168 | for (;;) { | |
9d4bee2b | 1169 | if (unlikely(!(ubc->running))) { |
784d5858 | 1170 | gig_dbg(DEBUG_ISO, "%s: not running", __func__); |
cf7776dc HL |
1171 | return; |
1172 | } | |
1173 | ||
1174 | /* retrieve completed URBs */ | |
1175 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
1176 | done = ubc->isooutdone; | |
1177 | ubc->isooutdone = NULL; | |
1178 | ovfl = ubc->isooutovfl; | |
1179 | ubc->isooutovfl = NULL; | |
1180 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
1181 | if (ovfl) { | |
bb7196d2 | 1182 | dev_err(cs->dev, "isoc write underrun\n"); |
cf7776dc HL |
1183 | error_hangup(bcs); |
1184 | break; | |
1185 | } | |
1186 | if (!done) | |
1187 | break; | |
1188 | ||
1189 | /* submit free URB if available */ | |
1190 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
1191 | next = ubc->isooutfree; | |
1192 | ubc->isooutfree = NULL; | |
1193 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
1194 | if (next) { | |
73a88814 TS |
1195 | rc = submit_iso_write_urb(next); |
1196 | if (unlikely(rc <= 0 && rc != -ENODEV)) { | |
cf7776dc HL |
1197 | /* could not submit URB, put it back */ |
1198 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
1199 | if (ubc->isooutfree == NULL) { | |
1200 | ubc->isooutfree = next; | |
1201 | next = NULL; | |
1202 | } | |
1203 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
1204 | if (next) { | |
1205 | /* couldn't put it back */ | |
784d5858 | 1206 | dev_err(cs->dev, |
bb7196d2 | 1207 | "losing isoc write URB\n"); |
cf7776dc HL |
1208 | error_hangup(bcs); |
1209 | } | |
1210 | } | |
1211 | } | |
1212 | ||
1213 | /* process completed URB */ | |
1214 | urb = done->urb; | |
dbd98231 TS |
1215 | status = done->status; |
1216 | switch (status) { | |
73a88814 TS |
1217 | case -EXDEV: /* partial completion */ |
1218 | gig_dbg(DEBUG_ISO, "%s: URB partially completed", | |
1219 | __func__); | |
1220 | /* fall through - what's the difference anyway? */ | |
cf7776dc | 1221 | case 0: /* normal completion */ |
73a88814 TS |
1222 | /* inspect individual frames |
1223 | * assumptions (for lack of documentation): | |
1224 | * - actual_length bytes of first frame in error are | |
917f5085 | 1225 | * successfully sent |
cf7776dc HL |
1226 | * - all following frames are not sent at all |
1227 | */ | |
73a88814 | 1228 | offset = done->limit; /* default (no error) */ |
cf7776dc HL |
1229 | for (i = 0; i < BAS_NUMFRAMES; i++) { |
1230 | ifd = &urb->iso_frame_desc[i]; | |
1231 | if (ifd->status || | |
1232 | ifd->actual_length != ifd->length) { | |
784d5858 | 1233 | dev_warn(cs->dev, |
bb7196d2 TS |
1234 | "isoc write: frame %d[%d/%d]: %s\n", |
1235 | i, ifd->actual_length, | |
1236 | ifd->length, | |
1237 | get_usb_statmsg(ifd->status)); | |
cf7776dc | 1238 | offset = (ifd->offset + |
784d5858 TS |
1239 | ifd->actual_length) |
1240 | % BAS_OUTBUFSIZE; | |
cf7776dc HL |
1241 | break; |
1242 | } | |
1243 | } | |
cf7776dc | 1244 | break; |
73a88814 | 1245 | case -EPIPE: /* stall - probably underrun */ |
bb7196d2 | 1246 | dev_err(cs->dev, "isoc write: stalled\n"); |
cf7776dc HL |
1247 | error_hangup(bcs); |
1248 | break; | |
bb7196d2 TS |
1249 | default: /* other errors */ |
1250 | dev_warn(cs->dev, "isoc write: %s\n", | |
dbd98231 | 1251 | get_usb_statmsg(status)); |
cf7776dc HL |
1252 | } |
1253 | ||
1254 | /* mark the write buffer area covered by this URB as free */ | |
1255 | if (done->limit >= 0) | |
9d4bee2b | 1256 | ubc->isooutbuf->read = done->limit; |
cf7776dc HL |
1257 | |
1258 | /* mark URB as free */ | |
1259 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
1260 | next = ubc->isooutfree; | |
1261 | ubc->isooutfree = done; | |
1262 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
1263 | if (next) { | |
1264 | /* only one URB still active - resubmit one */ | |
73a88814 TS |
1265 | rc = submit_iso_write_urb(next); |
1266 | if (unlikely(rc <= 0 && rc != -ENODEV)) { | |
cf7776dc HL |
1267 | /* couldn't submit */ |
1268 | error_hangup(bcs); | |
1269 | } | |
1270 | } | |
1271 | } | |
1272 | ||
1273 | /* process queued SKBs */ | |
1274 | while ((skb = skb_dequeue(&bcs->squeue))) { | |
1275 | /* copy to output buffer, doing L2 encapsulation */ | |
1276 | len = skb->len; | |
1277 | if (gigaset_isoc_buildframe(bcs, skb->data, len) == -EAGAIN) { | |
1278 | /* insufficient buffer space, push back onto queue */ | |
1279 | skb_queue_head(&bcs->squeue, skb); | |
784d5858 TS |
1280 | gig_dbg(DEBUG_ISO, "%s: skb requeued, qlen=%d", |
1281 | __func__, skb_queue_len(&bcs->squeue)); | |
cf7776dc HL |
1282 | break; |
1283 | } | |
1284 | skb_pull(skb, len); | |
1285 | gigaset_skb_sent(bcs, skb); | |
1286 | dev_kfree_skb_any(skb); | |
1287 | } | |
1288 | } | |
1289 | ||
1290 | /* Isochronous Read - Bottom Half */ | |
1291 | /* ============================== */ | |
1292 | ||
1293 | /* read_iso_tasklet | |
1294 | * tasklet scheduled when an isochronous input URB from the Gigaset device | |
1295 | * has completed | |
1296 | * parameter: | |
1297 | * data B channel state structure | |
1298 | */ | |
1299 | static void read_iso_tasklet(unsigned long data) | |
1300 | { | |
d48c7784 TS |
1301 | struct bc_state *bcs = (struct bc_state *) data; |
1302 | struct bas_bc_state *ubc = bcs->hw.bas; | |
1303 | struct cardstate *cs = bcs->cs; | |
cf7776dc | 1304 | struct urb *urb; |
dbd98231 | 1305 | int status; |
bb7196d2 | 1306 | struct usb_iso_packet_descriptor *ifd; |
cf7776dc HL |
1307 | char *rcvbuf; |
1308 | unsigned long flags; | |
1309 | int totleft, numbytes, offset, frame, rc; | |
1310 | ||
cf7776dc HL |
1311 | /* loop while more completed URBs arrive in the meantime */ |
1312 | for (;;) { | |
cf7776dc HL |
1313 | /* retrieve URB */ |
1314 | spin_lock_irqsave(&ubc->isoinlock, flags); | |
7891adf1 TS |
1315 | urb = ubc->isoindone; |
1316 | if (!urb) { | |
cf7776dc HL |
1317 | spin_unlock_irqrestore(&ubc->isoinlock, flags); |
1318 | return; | |
1319 | } | |
dbd98231 | 1320 | status = ubc->isoinstatus; |
cf7776dc HL |
1321 | ubc->isoindone = NULL; |
1322 | if (unlikely(ubc->loststatus != -EINPROGRESS)) { | |
784d5858 | 1323 | dev_warn(cs->dev, |
bb7196d2 | 1324 | "isoc read overrun, URB dropped (status: %s, %d bytes)\n", |
784d5858 TS |
1325 | get_usb_statmsg(ubc->loststatus), |
1326 | ubc->isoinlost); | |
cf7776dc HL |
1327 | ubc->loststatus = -EINPROGRESS; |
1328 | } | |
1329 | spin_unlock_irqrestore(&ubc->isoinlock, flags); | |
1330 | ||
9d4bee2b | 1331 | if (unlikely(!(ubc->running))) { |
784d5858 TS |
1332 | gig_dbg(DEBUG_ISO, |
1333 | "%s: channel not running, " | |
1334 | "dropped URB with status: %s", | |
dbd98231 | 1335 | __func__, get_usb_statmsg(status)); |
cf7776dc HL |
1336 | return; |
1337 | } | |
1338 | ||
dbd98231 | 1339 | switch (status) { |
cf7776dc HL |
1340 | case 0: /* normal completion */ |
1341 | break; | |
917f5085 TS |
1342 | case -EXDEV: /* inspect individual frames |
1343 | (we do that anyway) */ | |
784d5858 TS |
1344 | gig_dbg(DEBUG_ISO, "%s: URB partially completed", |
1345 | __func__); | |
cf7776dc HL |
1346 | break; |
1347 | case -ENOENT: | |
1348 | case -ECONNRESET: | |
73a88814 TS |
1349 | case -EINPROGRESS: |
1350 | gig_dbg(DEBUG_ISO, "%s: %s", | |
dbd98231 | 1351 | __func__, get_usb_statmsg(status)); |
cf7776dc HL |
1352 | continue; /* -> skip */ |
1353 | case -EPIPE: | |
bb7196d2 | 1354 | dev_err(cs->dev, "isoc read: stalled\n"); |
cf7776dc HL |
1355 | error_hangup(bcs); |
1356 | continue; /* -> skip */ | |
bb7196d2 TS |
1357 | default: /* other error */ |
1358 | dev_warn(cs->dev, "isoc read: %s\n", | |
dbd98231 | 1359 | get_usb_statmsg(status)); |
cf7776dc HL |
1360 | goto error; |
1361 | } | |
1362 | ||
1363 | rcvbuf = urb->transfer_buffer; | |
1364 | totleft = urb->actual_length; | |
1365 | for (frame = 0; totleft > 0 && frame < BAS_NUMFRAMES; frame++) { | |
bb7196d2 TS |
1366 | ifd = &urb->iso_frame_desc[frame]; |
1367 | numbytes = ifd->actual_length; | |
1368 | switch (ifd->status) { | |
1369 | case 0: /* success */ | |
1370 | break; | |
1371 | case -EPROTO: /* protocol error or unplug */ | |
1372 | case -EILSEQ: | |
1373 | case -ETIME: | |
1374 | /* probably just disconnected, ignore */ | |
1375 | gig_dbg(DEBUG_ISO, | |
1376 | "isoc read: frame %d[%d]: %s\n", | |
1377 | frame, numbytes, | |
1378 | get_usb_statmsg(ifd->status)); | |
1379 | break; | |
1380 | default: /* other error */ | |
1381 | /* report, assume transferred bytes are ok */ | |
784d5858 | 1382 | dev_warn(cs->dev, |
bb7196d2 | 1383 | "isoc read: frame %d[%d]: %s\n", |
eb4459ff | 1384 | frame, numbytes, |
bb7196d2 TS |
1385 | get_usb_statmsg(ifd->status)); |
1386 | } | |
eb4459ff | 1387 | if (unlikely(numbytes > BAS_MAXFRAME)) |
784d5858 | 1388 | dev_warn(cs->dev, |
bb7196d2 TS |
1389 | "isoc read: frame %d[%d]: %s\n", |
1390 | frame, numbytes, | |
1391 | "exceeds max frame size"); | |
cf7776dc | 1392 | if (unlikely(numbytes > totleft)) { |
784d5858 | 1393 | dev_warn(cs->dev, |
bb7196d2 TS |
1394 | "isoc read: frame %d[%d]: %s\n", |
1395 | frame, numbytes, | |
1396 | "exceeds total transfer length"); | |
eb4459ff | 1397 | numbytes = totleft; |
cf7776dc | 1398 | } |
bb7196d2 | 1399 | offset = ifd->offset; |
cf7776dc | 1400 | if (unlikely(offset + numbytes > BAS_INBUFSIZE)) { |
784d5858 | 1401 | dev_warn(cs->dev, |
bb7196d2 TS |
1402 | "isoc read: frame %d[%d]: %s\n", |
1403 | frame, numbytes, | |
1404 | "exceeds end of buffer"); | |
eb4459ff | 1405 | numbytes = BAS_INBUFSIZE - offset; |
cf7776dc HL |
1406 | } |
1407 | gigaset_isoc_receive(rcvbuf + offset, numbytes, bcs); | |
1408 | totleft -= numbytes; | |
1409 | } | |
1410 | if (unlikely(totleft > 0)) | |
bb7196d2 | 1411 | dev_warn(cs->dev, "isoc read: %d data bytes missing\n", |
784d5858 | 1412 | totleft); |
cf7776dc | 1413 | |
7891adf1 | 1414 | error: |
cf7776dc HL |
1415 | /* URB processed, resubmit */ |
1416 | for (frame = 0; frame < BAS_NUMFRAMES; frame++) { | |
1417 | urb->iso_frame_desc[frame].status = 0; | |
1418 | urb->iso_frame_desc[frame].actual_length = 0; | |
1419 | } | |
784d5858 TS |
1420 | /* urb->dev is clobbered by USB subsystem */ |
1421 | urb->dev = bcs->cs->hw.bas->udev; | |
cf7776dc HL |
1422 | urb->transfer_flags = URB_ISO_ASAP; |
1423 | urb->number_of_packets = BAS_NUMFRAMES; | |
54e6ecb2 | 1424 | rc = usb_submit_urb(urb, GFP_ATOMIC); |
73a88814 | 1425 | if (unlikely(rc != 0 && rc != -ENODEV)) { |
784d5858 | 1426 | dev_err(cs->dev, |
bb7196d2 | 1427 | "could not resubmit isoc read URB: %s\n", |
73a88814 | 1428 | get_usb_rcmsg(rc)); |
bb7196d2 | 1429 | dump_urb(DEBUG_ISO, "resubmit isoc read", urb); |
cf7776dc HL |
1430 | error_hangup(bcs); |
1431 | } | |
1432 | } | |
1433 | } | |
1434 | ||
1435 | /* Channel Operations */ | |
1436 | /* ================== */ | |
1437 | ||
1438 | /* req_timeout | |
1439 | * timeout routine for control output request | |
1440 | * argument: | |
1d5a9edc | 1441 | * controller state structure |
cf7776dc HL |
1442 | */ |
1443 | static void req_timeout(unsigned long data) | |
1444 | { | |
1d5a9edc TS |
1445 | struct cardstate *cs = (struct cardstate *) data; |
1446 | struct bas_cardstate *ucs = cs->hw.bas; | |
cf7776dc HL |
1447 | int pending; |
1448 | unsigned long flags; | |
1449 | ||
cf7776dc HL |
1450 | check_pending(ucs); |
1451 | ||
1452 | spin_lock_irqsave(&ucs->lock, flags); | |
1453 | pending = ucs->pending; | |
1454 | ucs->pending = 0; | |
1455 | spin_unlock_irqrestore(&ucs->lock, flags); | |
1456 | ||
1457 | switch (pending) { | |
1458 | case 0: /* no pending request */ | |
784d5858 | 1459 | gig_dbg(DEBUG_USBREQ, "%s: no request pending", __func__); |
cf7776dc HL |
1460 | break; |
1461 | ||
1462 | case HD_OPEN_ATCHANNEL: | |
1d5a9edc TS |
1463 | dev_err(cs->dev, "timeout opening AT channel\n"); |
1464 | error_reset(cs); | |
cf7776dc HL |
1465 | break; |
1466 | ||
cf7776dc | 1467 | case HD_OPEN_B1CHANNEL: |
1d5a9edc TS |
1468 | dev_err(cs->dev, "timeout opening channel 1\n"); |
1469 | error_hangup(&cs->bcs[0]); | |
1470 | break; | |
1471 | ||
1472 | case HD_OPEN_B2CHANNEL: | |
1473 | dev_err(cs->dev, "timeout opening channel 2\n"); | |
1474 | error_hangup(&cs->bcs[1]); | |
cf7776dc HL |
1475 | break; |
1476 | ||
1477 | case HD_CLOSE_ATCHANNEL: | |
1d5a9edc TS |
1478 | dev_err(cs->dev, "timeout closing AT channel\n"); |
1479 | error_reset(cs); | |
cf7776dc HL |
1480 | break; |
1481 | ||
cf7776dc | 1482 | case HD_CLOSE_B1CHANNEL: |
1d5a9edc TS |
1483 | dev_err(cs->dev, "timeout closing channel 1\n"); |
1484 | error_reset(cs); | |
1485 | break; | |
1486 | ||
1487 | case HD_CLOSE_B2CHANNEL: | |
1488 | dev_err(cs->dev, "timeout closing channel 2\n"); | |
1489 | error_reset(cs); | |
cf7776dc HL |
1490 | break; |
1491 | ||
b5f581d5 TS |
1492 | case HD_RESET_INTERRUPT_PIPE: |
1493 | /* error recovery escalation */ | |
1d5a9edc | 1494 | dev_err(cs->dev, |
b5f581d5 | 1495 | "reset interrupt pipe timeout, attempting USB reset\n"); |
1d5a9edc | 1496 | usb_queue_reset_device(ucs->interface); |
b5f581d5 TS |
1497 | break; |
1498 | ||
cf7776dc | 1499 | default: |
1d5a9edc | 1500 | dev_warn(cs->dev, "request 0x%02x timed out, clearing\n", |
784d5858 | 1501 | pending); |
cf7776dc | 1502 | } |
024fd299 TS |
1503 | |
1504 | wake_up(&ucs->waitqueue); | |
cf7776dc HL |
1505 | } |
1506 | ||
1507 | /* write_ctrl_callback | |
1508 | * USB completion handler for control pipe output | |
1509 | * called by the USB subsystem in interrupt context | |
1510 | * parameter: | |
1511 | * urb USB request block of completed request | |
1512 | * urb->context = hardware specific controller state structure | |
1513 | */ | |
7d12e780 | 1514 | static void write_ctrl_callback(struct urb *urb) |
cf7776dc | 1515 | { |
d48c7784 | 1516 | struct bas_cardstate *ucs = urb->context; |
dbd98231 | 1517 | int status = urb->status; |
06163f86 | 1518 | int rc; |
cf7776dc HL |
1519 | unsigned long flags; |
1520 | ||
06163f86 | 1521 | /* check status */ |
dbd98231 | 1522 | switch (status) { |
06163f86 TS |
1523 | case 0: /* normal completion */ |
1524 | spin_lock_irqsave(&ucs->lock, flags); | |
1525 | switch (ucs->pending) { | |
1526 | case HD_DEVICE_INIT_ACK: /* no reply expected */ | |
1527 | del_timer(&ucs->timer_ctrl); | |
1528 | ucs->pending = 0; | |
1529 | break; | |
1530 | } | |
1531 | spin_unlock_irqrestore(&ucs->lock, flags); | |
1532 | return; | |
1533 | ||
1534 | case -ENOENT: /* cancelled */ | |
1535 | case -ECONNRESET: /* cancelled (async) */ | |
1536 | case -EINPROGRESS: /* pending */ | |
1537 | case -ENODEV: /* device removed */ | |
1538 | case -ESHUTDOWN: /* device shut down */ | |
1539 | /* ignore silently */ | |
1540 | gig_dbg(DEBUG_USBREQ, "%s: %s", | |
dbd98231 | 1541 | __func__, get_usb_statmsg(status)); |
cf7776dc | 1542 | break; |
06163f86 TS |
1543 | |
1544 | default: /* any failure */ | |
024fd299 TS |
1545 | /* don't retry if suspend requested */ |
1546 | if (++ucs->retry_ctrl > BAS_RETRY || | |
9d4bee2b | 1547 | (ucs->basstate & BS_SUSPEND)) { |
06163f86 TS |
1548 | dev_err(&ucs->interface->dev, |
1549 | "control request 0x%02x failed: %s\n", | |
1550 | ucs->dr_ctrl.bRequest, | |
dbd98231 | 1551 | get_usb_statmsg(status)); |
06163f86 TS |
1552 | break; /* give up */ |
1553 | } | |
1554 | dev_notice(&ucs->interface->dev, | |
1555 | "control request 0x%02x: %s, retry %d\n", | |
dbd98231 | 1556 | ucs->dr_ctrl.bRequest, get_usb_statmsg(status), |
06163f86 TS |
1557 | ucs->retry_ctrl); |
1558 | /* urb->dev is clobbered by USB subsystem */ | |
1559 | urb->dev = ucs->udev; | |
54e6ecb2 | 1560 | rc = usb_submit_urb(urb, GFP_ATOMIC); |
06163f86 TS |
1561 | if (unlikely(rc)) { |
1562 | dev_err(&ucs->interface->dev, | |
1563 | "could not resubmit request 0x%02x: %s\n", | |
1564 | ucs->dr_ctrl.bRequest, get_usb_rcmsg(rc)); | |
1565 | break; | |
1566 | } | |
1567 | /* resubmitted */ | |
1568 | return; | |
cf7776dc | 1569 | } |
06163f86 TS |
1570 | |
1571 | /* failed, clear pending request */ | |
1572 | spin_lock_irqsave(&ucs->lock, flags); | |
1573 | del_timer(&ucs->timer_ctrl); | |
1574 | ucs->pending = 0; | |
cf7776dc | 1575 | spin_unlock_irqrestore(&ucs->lock, flags); |
024fd299 | 1576 | wake_up(&ucs->waitqueue); |
cf7776dc HL |
1577 | } |
1578 | ||
1579 | /* req_submit | |
1580 | * submit a control output request without message buffer to the Gigaset base | |
1581 | * and optionally start a timeout | |
1582 | * parameters: | |
1583 | * bcs B channel control structure | |
1584 | * req control request code (HD_*) | |
1585 | * val control request parameter value (set to 0 if unused) | |
1586 | * timeout timeout in seconds (0: no timeout) | |
1587 | * return value: | |
1588 | * 0 on success | |
cf7776dc HL |
1589 | * -EBUSY if another request is pending |
1590 | * any URB submission error code | |
1591 | */ | |
1592 | static int req_submit(struct bc_state *bcs, int req, int val, int timeout) | |
1593 | { | |
d48c7784 | 1594 | struct bas_cardstate *ucs = bcs->cs->hw.bas; |
cf7776dc HL |
1595 | int ret; |
1596 | unsigned long flags; | |
1597 | ||
784d5858 | 1598 | gig_dbg(DEBUG_USBREQ, "-------> 0x%02x (%d)", req, val); |
cf7776dc HL |
1599 | |
1600 | spin_lock_irqsave(&ucs->lock, flags); | |
1601 | if (ucs->pending) { | |
1602 | spin_unlock_irqrestore(&ucs->lock, flags); | |
784d5858 TS |
1603 | dev_err(bcs->cs->dev, |
1604 | "submission of request 0x%02x failed: " | |
1605 | "request 0x%02x still pending\n", | |
1606 | req, ucs->pending); | |
cf7776dc HL |
1607 | return -EBUSY; |
1608 | } | |
cf7776dc HL |
1609 | |
1610 | ucs->dr_ctrl.bRequestType = OUT_VENDOR_REQ; | |
1611 | ucs->dr_ctrl.bRequest = req; | |
1612 | ucs->dr_ctrl.wValue = cpu_to_le16(val); | |
1613 | ucs->dr_ctrl.wIndex = 0; | |
1614 | ucs->dr_ctrl.wLength = 0; | |
1615 | usb_fill_control_urb(ucs->urb_ctrl, ucs->udev, | |
784d5858 | 1616 | usb_sndctrlpipe(ucs->udev, 0), |
7891adf1 | 1617 | (unsigned char *) &ucs->dr_ctrl, NULL, 0, |
784d5858 | 1618 | write_ctrl_callback, ucs); |
06163f86 | 1619 | ucs->retry_ctrl = 0; |
54e6ecb2 | 1620 | ret = usb_submit_urb(ucs->urb_ctrl, GFP_ATOMIC); |
06163f86 | 1621 | if (unlikely(ret)) { |
784d5858 | 1622 | dev_err(bcs->cs->dev, "could not submit request 0x%02x: %s\n", |
06163f86 | 1623 | req, get_usb_rcmsg(ret)); |
cf7776dc HL |
1624 | spin_unlock_irqrestore(&ucs->lock, flags); |
1625 | return ret; | |
1626 | } | |
1627 | ucs->pending = req; | |
1628 | ||
1629 | if (timeout > 0) { | |
784d5858 | 1630 | gig_dbg(DEBUG_USBREQ, "setting timeout of %d/10 secs", timeout); |
1d5a9edc | 1631 | mod_timer(&ucs->timer_ctrl, jiffies + timeout * HZ / 10); |
cf7776dc HL |
1632 | } |
1633 | ||
1634 | spin_unlock_irqrestore(&ucs->lock, flags); | |
1635 | return 0; | |
1636 | } | |
1637 | ||
1638 | /* gigaset_init_bchannel | |
1639 | * called by common.c to connect a B channel | |
1640 | * initialize isochronous I/O and tell the Gigaset base to open the channel | |
1641 | * argument: | |
1642 | * B channel control structure | |
1643 | * return value: | |
1644 | * 0 on success, error code < 0 on error | |
1645 | */ | |
1646 | static int gigaset_init_bchannel(struct bc_state *bcs) | |
1647 | { | |
c652cbd8 | 1648 | struct cardstate *cs = bcs->cs; |
cf7776dc | 1649 | int req, ret; |
73a88814 TS |
1650 | unsigned long flags; |
1651 | ||
c652cbd8 TS |
1652 | spin_lock_irqsave(&cs->lock, flags); |
1653 | if (unlikely(!cs->connected)) { | |
73a88814 | 1654 | gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__); |
c652cbd8 | 1655 | spin_unlock_irqrestore(&cs->lock, flags); |
73a88814 TS |
1656 | return -ENODEV; |
1657 | } | |
cf7776dc | 1658 | |
9d4bee2b | 1659 | if (cs->hw.bas->basstate & BS_SUSPEND) { |
024fd299 | 1660 | dev_notice(cs->dev, |
bb7196d2 | 1661 | "not starting isoc I/O, suspend in progress\n"); |
024fd299 TS |
1662 | spin_unlock_irqrestore(&cs->lock, flags); |
1663 | return -EHOSTUNREACH; | |
1664 | } | |
1665 | ||
7891adf1 TS |
1666 | ret = starturbs(bcs); |
1667 | if (ret < 0) { | |
b33ffa5c | 1668 | spin_unlock_irqrestore(&cs->lock, flags); |
c652cbd8 | 1669 | dev_err(cs->dev, |
bb7196d2 | 1670 | "could not start isoc I/O for channel B%d: %s\n", |
73a88814 TS |
1671 | bcs->channel + 1, |
1672 | ret == -EFAULT ? "null URB" : get_usb_rcmsg(ret)); | |
1673 | if (ret != -ENODEV) | |
1674 | error_hangup(bcs); | |
cf7776dc HL |
1675 | return ret; |
1676 | } | |
1677 | ||
1678 | req = bcs->channel ? HD_OPEN_B2CHANNEL : HD_OPEN_B1CHANNEL; | |
7891adf1 TS |
1679 | ret = req_submit(bcs, req, 0, BAS_TIMEOUT); |
1680 | if (ret < 0) { | |
c652cbd8 | 1681 | dev_err(cs->dev, "could not open channel B%d\n", |
73a88814 | 1682 | bcs->channel + 1); |
cf7776dc | 1683 | stopurbs(bcs->hw.bas); |
cf7776dc | 1684 | } |
73a88814 | 1685 | |
c652cbd8 | 1686 | spin_unlock_irqrestore(&cs->lock, flags); |
b33ffa5c TS |
1687 | if (ret < 0 && ret != -ENODEV) |
1688 | error_hangup(bcs); | |
cf7776dc HL |
1689 | return ret; |
1690 | } | |
1691 | ||
1692 | /* gigaset_close_bchannel | |
1693 | * called by common.c to disconnect a B channel | |
1694 | * tell the Gigaset base to close the channel | |
1695 | * stopping isochronous I/O and LL notification will be done when the | |
1696 | * acknowledgement for the close arrives | |
1697 | * argument: | |
1698 | * B channel control structure | |
1699 | * return value: | |
1700 | * 0 on success, error code < 0 on error | |
1701 | */ | |
1702 | static int gigaset_close_bchannel(struct bc_state *bcs) | |
1703 | { | |
c652cbd8 | 1704 | struct cardstate *cs = bcs->cs; |
cf7776dc | 1705 | int req, ret; |
73a88814 TS |
1706 | unsigned long flags; |
1707 | ||
c652cbd8 TS |
1708 | spin_lock_irqsave(&cs->lock, flags); |
1709 | if (unlikely(!cs->connected)) { | |
1710 | spin_unlock_irqrestore(&cs->lock, flags); | |
73a88814 TS |
1711 | gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__); |
1712 | return -ENODEV; | |
1713 | } | |
cf7776dc | 1714 | |
9d4bee2b | 1715 | if (!(cs->hw.bas->basstate & (bcs->channel ? BS_B2OPEN : BS_B1OPEN))) { |
cf7776dc | 1716 | /* channel not running: just signal common.c */ |
c652cbd8 | 1717 | spin_unlock_irqrestore(&cs->lock, flags); |
cf7776dc HL |
1718 | gigaset_bchannel_down(bcs); |
1719 | return 0; | |
1720 | } | |
1721 | ||
73a88814 | 1722 | /* channel running: tell device to close it */ |
cf7776dc | 1723 | req = bcs->channel ? HD_CLOSE_B2CHANNEL : HD_CLOSE_B1CHANNEL; |
7891adf1 TS |
1724 | ret = req_submit(bcs, req, 0, BAS_TIMEOUT); |
1725 | if (ret < 0) | |
c652cbd8 | 1726 | dev_err(cs->dev, "closing channel B%d failed\n", |
73a88814 TS |
1727 | bcs->channel + 1); |
1728 | ||
c652cbd8 | 1729 | spin_unlock_irqrestore(&cs->lock, flags); |
cf7776dc HL |
1730 | return ret; |
1731 | } | |
1732 | ||
1733 | /* Device Operations */ | |
1734 | /* ================= */ | |
1735 | ||
1736 | /* complete_cb | |
1737 | * unqueue first command buffer from queue, waking any sleepers | |
1738 | * must be called with cs->cmdlock held | |
1739 | * parameter: | |
1740 | * cs controller state structure | |
1741 | */ | |
1742 | static void complete_cb(struct cardstate *cs) | |
1743 | { | |
d48c7784 | 1744 | struct cmdbuf_t *cb = cs->cmdbuf; |
cf7776dc HL |
1745 | |
1746 | /* unqueue completed buffer */ | |
1747 | cs->cmdbytes -= cs->curlen; | |
1528b18f | 1748 | gig_dbg(DEBUG_OUTPUT, "write_command: sent %u bytes, %u left", |
784d5858 | 1749 | cs->curlen, cs->cmdbytes); |
7891adf1 TS |
1750 | if (cb->next != NULL) { |
1751 | cs->cmdbuf = cb->next; | |
cf7776dc HL |
1752 | cs->cmdbuf->prev = NULL; |
1753 | cs->curlen = cs->cmdbuf->len; | |
1754 | } else { | |
7891adf1 | 1755 | cs->cmdbuf = NULL; |
cf7776dc HL |
1756 | cs->lastcmdbuf = NULL; |
1757 | cs->curlen = 0; | |
1758 | } | |
1759 | ||
1760 | if (cb->wake_tasklet) | |
1761 | tasklet_schedule(cb->wake_tasklet); | |
1762 | ||
1763 | kfree(cb); | |
1764 | } | |
1765 | ||
cf7776dc HL |
1766 | /* write_command_callback |
1767 | * USB completion handler for AT command transmission | |
1768 | * called by the USB subsystem in interrupt context | |
1769 | * parameter: | |
1770 | * urb USB request block of completed request | |
1771 | * urb->context = controller state structure | |
1772 | */ | |
7d12e780 | 1773 | static void write_command_callback(struct urb *urb) |
cf7776dc | 1774 | { |
d48c7784 TS |
1775 | struct cardstate *cs = urb->context; |
1776 | struct bas_cardstate *ucs = cs->hw.bas; | |
dbd98231 | 1777 | int status = urb->status; |
cf7776dc | 1778 | unsigned long flags; |
cf7776dc | 1779 | |
73a88814 | 1780 | update_basstate(ucs, 0, BS_ATWRPEND); |
024fd299 | 1781 | wake_up(&ucs->waitqueue); |
73a88814 | 1782 | |
cf7776dc | 1783 | /* check status */ |
dbd98231 | 1784 | switch (status) { |
cf7776dc HL |
1785 | case 0: /* normal completion */ |
1786 | break; | |
73a88814 TS |
1787 | case -ENOENT: /* cancelled */ |
1788 | case -ECONNRESET: /* cancelled (async) */ | |
cf7776dc | 1789 | case -EINPROGRESS: /* pending */ |
73a88814 TS |
1790 | case -ENODEV: /* device removed */ |
1791 | case -ESHUTDOWN: /* device shut down */ | |
cf7776dc | 1792 | /* ignore silently */ |
784d5858 | 1793 | gig_dbg(DEBUG_USBREQ, "%s: %s", |
dbd98231 | 1794 | __func__, get_usb_statmsg(status)); |
cf7776dc HL |
1795 | return; |
1796 | default: /* any failure */ | |
1797 | if (++ucs->retry_cmd_out > BAS_RETRY) { | |
784d5858 TS |
1798 | dev_warn(cs->dev, |
1799 | "command write: %s, " | |
1800 | "giving up after %d retries\n", | |
dbd98231 | 1801 | get_usb_statmsg(status), |
784d5858 | 1802 | ucs->retry_cmd_out); |
cf7776dc HL |
1803 | break; |
1804 | } | |
9d4bee2b | 1805 | if (ucs->basstate & BS_SUSPEND) { |
024fd299 TS |
1806 | dev_warn(cs->dev, |
1807 | "command write: %s, " | |
1808 | "won't retry - suspend requested\n", | |
1809 | get_usb_statmsg(status)); | |
1810 | break; | |
1811 | } | |
cf7776dc | 1812 | if (cs->cmdbuf == NULL) { |
784d5858 TS |
1813 | dev_warn(cs->dev, |
1814 | "command write: %s, " | |
1815 | "cannot retry - cmdbuf gone\n", | |
dbd98231 | 1816 | get_usb_statmsg(status)); |
cf7776dc HL |
1817 | break; |
1818 | } | |
784d5858 | 1819 | dev_notice(cs->dev, "command write: %s, retry %d\n", |
dbd98231 | 1820 | get_usb_statmsg(status), ucs->retry_cmd_out); |
cf7776dc HL |
1821 | if (atwrite_submit(cs, cs->cmdbuf->buf, cs->cmdbuf->len) >= 0) |
1822 | /* resubmitted - bypass regular exit block */ | |
1823 | return; | |
1824 | /* command send failed, assume base still waiting */ | |
1825 | update_basstate(ucs, BS_ATREADY, 0); | |
1826 | } | |
1827 | ||
1828 | spin_lock_irqsave(&cs->cmdlock, flags); | |
1829 | if (cs->cmdbuf != NULL) | |
1830 | complete_cb(cs); | |
1831 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
1832 | } | |
1833 | ||
1834 | /* atrdy_timeout | |
1835 | * timeout routine for AT command transmission | |
1836 | * argument: | |
1837 | * controller state structure | |
1838 | */ | |
1839 | static void atrdy_timeout(unsigned long data) | |
1840 | { | |
1841 | struct cardstate *cs = (struct cardstate *) data; | |
d48c7784 | 1842 | struct bas_cardstate *ucs = cs->hw.bas; |
cf7776dc | 1843 | |
784d5858 | 1844 | dev_warn(cs->dev, "timeout waiting for HD_READY_SEND_ATDATA\n"); |
cf7776dc HL |
1845 | |
1846 | /* fake the missing signal - what else can I do? */ | |
1847 | update_basstate(ucs, BS_ATREADY, BS_ATTIMER); | |
1848 | start_cbsend(cs); | |
1849 | } | |
1850 | ||
1851 | /* atwrite_submit | |
1852 | * submit an HD_WRITE_ATMESSAGE command URB | |
1853 | * parameters: | |
1854 | * cs controller state structure | |
1855 | * buf buffer containing command to send | |
1856 | * len length of command to send | |
1857 | * return value: | |
1858 | * 0 on success | |
cf7776dc HL |
1859 | * -EBUSY if another request is pending |
1860 | * any URB submission error code | |
1861 | */ | |
1862 | static int atwrite_submit(struct cardstate *cs, unsigned char *buf, int len) | |
1863 | { | |
d48c7784 | 1864 | struct bas_cardstate *ucs = cs->hw.bas; |
73a88814 | 1865 | int rc; |
cf7776dc | 1866 | |
784d5858 | 1867 | gig_dbg(DEBUG_USBREQ, "-------> HD_WRITE_ATMESSAGE (%d)", len); |
cf7776dc | 1868 | |
73a88814 | 1869 | if (update_basstate(ucs, BS_ATWRPEND, 0) & BS_ATWRPEND) { |
784d5858 TS |
1870 | dev_err(cs->dev, |
1871 | "could not submit HD_WRITE_ATMESSAGE: URB busy\n"); | |
cf7776dc HL |
1872 | return -EBUSY; |
1873 | } | |
1874 | ||
1875 | ucs->dr_cmd_out.bRequestType = OUT_VENDOR_REQ; | |
1876 | ucs->dr_cmd_out.bRequest = HD_WRITE_ATMESSAGE; | |
1877 | ucs->dr_cmd_out.wValue = 0; | |
1878 | ucs->dr_cmd_out.wIndex = 0; | |
1879 | ucs->dr_cmd_out.wLength = cpu_to_le16(len); | |
1880 | usb_fill_control_urb(ucs->urb_cmd_out, ucs->udev, | |
1881 | usb_sndctrlpipe(ucs->udev, 0), | |
7891adf1 | 1882 | (unsigned char *) &ucs->dr_cmd_out, buf, len, |
cf7776dc | 1883 | write_command_callback, cs); |
54e6ecb2 | 1884 | rc = usb_submit_urb(ucs->urb_cmd_out, GFP_ATOMIC); |
73a88814 TS |
1885 | if (unlikely(rc)) { |
1886 | update_basstate(ucs, 0, BS_ATWRPEND); | |
784d5858 | 1887 | dev_err(cs->dev, "could not submit HD_WRITE_ATMESSAGE: %s\n", |
73a88814 TS |
1888 | get_usb_rcmsg(rc)); |
1889 | return rc; | |
cf7776dc HL |
1890 | } |
1891 | ||
73a88814 TS |
1892 | /* submitted successfully, start timeout if necessary */ |
1893 | if (!(update_basstate(ucs, BS_ATTIMER, BS_ATREADY) & BS_ATTIMER)) { | |
784d5858 TS |
1894 | gig_dbg(DEBUG_OUTPUT, "setting ATREADY timeout of %d/10 secs", |
1895 | ATRDY_TIMEOUT); | |
1d5a9edc | 1896 | mod_timer(&ucs->timer_atrdy, jiffies + ATRDY_TIMEOUT * HZ / 10); |
cf7776dc HL |
1897 | } |
1898 | return 0; | |
1899 | } | |
1900 | ||
1901 | /* start_cbsend | |
1902 | * start transmission of AT command queue if necessary | |
1903 | * parameter: | |
1904 | * cs controller state structure | |
1905 | * return value: | |
1906 | * 0 on success | |
1907 | * error code < 0 on error | |
1908 | */ | |
1909 | static int start_cbsend(struct cardstate *cs) | |
1910 | { | |
1911 | struct cmdbuf_t *cb; | |
d48c7784 | 1912 | struct bas_cardstate *ucs = cs->hw.bas; |
cf7776dc HL |
1913 | unsigned long flags; |
1914 | int rc; | |
1915 | int retval = 0; | |
1916 | ||
024fd299 | 1917 | /* check if suspend requested */ |
9d4bee2b | 1918 | if (ucs->basstate & BS_SUSPEND) { |
1528b18f | 1919 | gig_dbg(DEBUG_OUTPUT, "suspending"); |
024fd299 TS |
1920 | return -EHOSTUNREACH; |
1921 | } | |
1922 | ||
cf7776dc | 1923 | /* check if AT channel is open */ |
9d4bee2b | 1924 | if (!(ucs->basstate & BS_ATOPEN)) { |
1528b18f | 1925 | gig_dbg(DEBUG_OUTPUT, "AT channel not open"); |
cf7776dc HL |
1926 | rc = req_submit(cs->bcs, HD_OPEN_ATCHANNEL, 0, BAS_TIMEOUT); |
1927 | if (rc < 0) { | |
cf7776dc HL |
1928 | /* flush command queue */ |
1929 | spin_lock_irqsave(&cs->cmdlock, flags); | |
1930 | while (cs->cmdbuf != NULL) | |
1931 | complete_cb(cs); | |
1932 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
1933 | } | |
1934 | return rc; | |
1935 | } | |
1936 | ||
1937 | /* try to send first command in queue */ | |
1938 | spin_lock_irqsave(&cs->cmdlock, flags); | |
1939 | ||
9d4bee2b | 1940 | while ((cb = cs->cmdbuf) != NULL && (ucs->basstate & BS_ATREADY)) { |
cf7776dc HL |
1941 | ucs->retry_cmd_out = 0; |
1942 | rc = atwrite_submit(cs, cb->buf, cb->len); | |
1943 | if (unlikely(rc)) { | |
1944 | retval = rc; | |
1945 | complete_cb(cs); | |
1946 | } | |
1947 | } | |
1948 | ||
1949 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
1950 | return retval; | |
1951 | } | |
1952 | ||
1953 | /* gigaset_write_cmd | |
1954 | * This function is called by the device independent part of the driver | |
1955 | * to transmit an AT command string to the Gigaset device. | |
1956 | * It encapsulates the device specific method for transmission over the | |
1957 | * direct USB connection to the base. | |
1958 | * The command string is added to the queue of commands to send, and | |
1959 | * USB transmission is started if necessary. | |
1960 | * parameters: | |
1961 | * cs controller state structure | |
e3628dd1 | 1962 | * cb command buffer structure |
cf7776dc HL |
1963 | * return value: |
1964 | * number of bytes queued on success | |
1965 | * error code < 0 on error | |
1966 | */ | |
e3628dd1 | 1967 | static int gigaset_write_cmd(struct cardstate *cs, struct cmdbuf_t *cb) |
cf7776dc | 1968 | { |
cf7776dc | 1969 | unsigned long flags; |
39f07223 | 1970 | int rc; |
cf7776dc | 1971 | |
9d4bee2b | 1972 | gigaset_dbg_buffer(cs->mstate != MS_LOCKED ? |
784d5858 | 1973 | DEBUG_TRANSCMD : DEBUG_LOCKCMD, |
e3628dd1 | 1974 | "CMD Transmit", cb->len, cb->buf); |
cf7776dc | 1975 | |
b5f581d5 TS |
1976 | /* translate "+++" escape sequence sent as a single separate command |
1977 | * into "close AT channel" command for error recovery | |
1978 | * The next command will reopen the AT channel automatically. | |
1979 | */ | |
e3628dd1 | 1980 | if (cb->len == 3 && !memcmp(cb->buf, "+++", 3)) { |
4cb5e42f TS |
1981 | /* If an HD_RECEIVEATDATA_ACK message remains unhandled |
1982 | * because of an error, the base never sends another one. | |
1983 | * The response channel is thus effectively blocked. | |
1984 | * Closing and reopening the AT channel does *not* clear | |
1985 | * this condition. | |
1986 | * As a stopgap measure, submit a zero-length AT read | |
1987 | * before closing the AT channel. This has the undocumented | |
1988 | * effect of triggering a new HD_RECEIVEATDATA_ACK message | |
1989 | * from the base if necessary. | |
1990 | * The subsequent AT channel close then discards any pending | |
1991 | * messages. | |
1992 | */ | |
1993 | spin_lock_irqsave(&cs->lock, flags); | |
1994 | if (!(cs->hw.bas->basstate & BS_ATRDPEND)) { | |
1995 | kfree(cs->hw.bas->rcvbuf); | |
1996 | cs->hw.bas->rcvbuf = NULL; | |
1997 | cs->hw.bas->rcvbuf_size = 0; | |
1998 | cs->hw.bas->retry_cmd_in = 0; | |
1999 | atread_submit(cs, 0); | |
2000 | } | |
2001 | spin_unlock_irqrestore(&cs->lock, flags); | |
2002 | ||
b5f581d5 | 2003 | rc = req_submit(cs->bcs, HD_CLOSE_ATCHANNEL, 0, BAS_TIMEOUT); |
e3628dd1 TS |
2004 | if (cb->wake_tasklet) |
2005 | tasklet_schedule(cb->wake_tasklet); | |
8bcfbd0a DC |
2006 | if (!rc) |
2007 | rc = cb->len; | |
2008 | kfree(cb); | |
2009 | return rc; | |
cf7776dc HL |
2010 | } |
2011 | ||
cf7776dc HL |
2012 | spin_lock_irqsave(&cs->cmdlock, flags); |
2013 | cb->prev = cs->lastcmdbuf; | |
2014 | if (cs->lastcmdbuf) | |
2015 | cs->lastcmdbuf->next = cb; | |
2016 | else { | |
2017 | cs->cmdbuf = cb; | |
e3628dd1 | 2018 | cs->curlen = cb->len; |
cf7776dc | 2019 | } |
e3628dd1 | 2020 | cs->cmdbytes += cb->len; |
cf7776dc HL |
2021 | cs->lastcmdbuf = cb; |
2022 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
2023 | ||
73a88814 TS |
2024 | spin_lock_irqsave(&cs->lock, flags); |
2025 | if (unlikely(!cs->connected)) { | |
2026 | spin_unlock_irqrestore(&cs->lock, flags); | |
2027 | gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__); | |
39f07223 TS |
2028 | /* flush command queue */ |
2029 | spin_lock_irqsave(&cs->cmdlock, flags); | |
2030 | while (cs->cmdbuf != NULL) | |
2031 | complete_cb(cs); | |
2032 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
73a88814 TS |
2033 | return -ENODEV; |
2034 | } | |
39f07223 | 2035 | rc = start_cbsend(cs); |
73a88814 | 2036 | spin_unlock_irqrestore(&cs->lock, flags); |
e3628dd1 | 2037 | return rc < 0 ? rc : cb->len; |
cf7776dc HL |
2038 | } |
2039 | ||
2040 | /* gigaset_write_room | |
2041 | * tty_driver.write_room interface routine | |
917f5085 TS |
2042 | * return number of characters the driver will accept to be written via |
2043 | * gigaset_write_cmd | |
cf7776dc HL |
2044 | * parameter: |
2045 | * controller state structure | |
2046 | * return value: | |
2047 | * number of characters | |
2048 | */ | |
2049 | static int gigaset_write_room(struct cardstate *cs) | |
2050 | { | |
2051 | return IF_WRITEBUF; | |
2052 | } | |
2053 | ||
2054 | /* gigaset_chars_in_buffer | |
2055 | * tty_driver.chars_in_buffer interface routine | |
2056 | * return number of characters waiting to be sent | |
2057 | * parameter: | |
2058 | * controller state structure | |
2059 | * return value: | |
2060 | * number of characters | |
2061 | */ | |
2062 | static int gigaset_chars_in_buffer(struct cardstate *cs) | |
2063 | { | |
4d1ff582 | 2064 | return cs->cmdbytes; |
cf7776dc HL |
2065 | } |
2066 | ||
2067 | /* gigaset_brkchars | |
2068 | * implementation of ioctl(GIGASET_BRKCHARS) | |
2069 | * parameter: | |
2070 | * controller state structure | |
2071 | * return value: | |
2072 | * -EINVAL (unimplemented function) | |
2073 | */ | |
2074 | static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6]) | |
2075 | { | |
2076 | return -EINVAL; | |
2077 | } | |
2078 | ||
2079 | ||
2080 | /* Device Initialization/Shutdown */ | |
2081 | /* ============================== */ | |
2082 | ||
2083 | /* Free hardware dependent part of the B channel structure | |
2084 | * parameter: | |
2085 | * bcs B channel structure | |
2086 | * return value: | |
2087 | * !=0 on success | |
2088 | */ | |
2089 | static int gigaset_freebcshw(struct bc_state *bcs) | |
2090 | { | |
73a88814 TS |
2091 | struct bas_bc_state *ubc = bcs->hw.bas; |
2092 | int i; | |
2093 | ||
2094 | if (!ubc) | |
cf7776dc HL |
2095 | return 0; |
2096 | ||
73a88814 | 2097 | /* kill URBs and tasklets before freeing - better safe than sorry */ |
9d4bee2b | 2098 | ubc->running = 0; |
bb7196d2 | 2099 | gig_dbg(DEBUG_INIT, "%s: killing isoc URBs", __func__); |
39f07223 TS |
2100 | for (i = 0; i < BAS_OUTURBS; ++i) { |
2101 | usb_kill_urb(ubc->isoouturbs[i].urb); | |
2102 | usb_free_urb(ubc->isoouturbs[i].urb); | |
2103 | } | |
2104 | for (i = 0; i < BAS_INURBS; ++i) { | |
2105 | usb_kill_urb(ubc->isoinurbs[i]); | |
2106 | usb_free_urb(ubc->isoinurbs[i]); | |
2107 | } | |
73a88814 TS |
2108 | tasklet_kill(&ubc->sent_tasklet); |
2109 | tasklet_kill(&ubc->rcvd_tasklet); | |
2110 | kfree(ubc->isooutbuf); | |
2111 | kfree(ubc); | |
cf7776dc HL |
2112 | bcs->hw.bas = NULL; |
2113 | return 1; | |
2114 | } | |
2115 | ||
2116 | /* Initialize hardware dependent part of the B channel structure | |
2117 | * parameter: | |
2118 | * bcs B channel structure | |
2119 | * return value: | |
2120 | * !=0 on success | |
2121 | */ | |
2122 | static int gigaset_initbcshw(struct bc_state *bcs) | |
2123 | { | |
2124 | int i; | |
2125 | struct bas_bc_state *ubc; | |
2126 | ||
2127 | bcs->hw.bas = ubc = kmalloc(sizeof(struct bas_bc_state), GFP_KERNEL); | |
2128 | if (!ubc) { | |
c8770dca | 2129 | pr_err("out of memory\n"); |
cf7776dc HL |
2130 | return 0; |
2131 | } | |
2132 | ||
9d4bee2b | 2133 | ubc->running = 0; |
cf7776dc HL |
2134 | atomic_set(&ubc->corrbytes, 0); |
2135 | spin_lock_init(&ubc->isooutlock); | |
2136 | for (i = 0; i < BAS_OUTURBS; ++i) { | |
2137 | ubc->isoouturbs[i].urb = NULL; | |
2138 | ubc->isoouturbs[i].bcs = bcs; | |
2139 | } | |
2140 | ubc->isooutdone = ubc->isooutfree = ubc->isooutovfl = NULL; | |
2141 | ubc->numsub = 0; | |
7891adf1 TS |
2142 | ubc->isooutbuf = kmalloc(sizeof(struct isowbuf_t), GFP_KERNEL); |
2143 | if (!ubc->isooutbuf) { | |
c8770dca | 2144 | pr_err("out of memory\n"); |
cf7776dc HL |
2145 | kfree(ubc); |
2146 | bcs->hw.bas = NULL; | |
2147 | return 0; | |
2148 | } | |
2149 | tasklet_init(&ubc->sent_tasklet, | |
5452fee2 | 2150 | write_iso_tasklet, (unsigned long) bcs); |
cf7776dc HL |
2151 | |
2152 | spin_lock_init(&ubc->isoinlock); | |
2153 | for (i = 0; i < BAS_INURBS; ++i) | |
2154 | ubc->isoinurbs[i] = NULL; | |
2155 | ubc->isoindone = NULL; | |
2156 | ubc->loststatus = -EINPROGRESS; | |
2157 | ubc->isoinlost = 0; | |
2158 | ubc->seqlen = 0; | |
2159 | ubc->inbyte = 0; | |
2160 | ubc->inbits = 0; | |
2161 | ubc->goodbytes = 0; | |
2162 | ubc->alignerrs = 0; | |
2163 | ubc->fcserrs = 0; | |
2164 | ubc->frameerrs = 0; | |
2165 | ubc->giants = 0; | |
2166 | ubc->runts = 0; | |
2167 | ubc->aborts = 0; | |
2168 | ubc->shared0s = 0; | |
2169 | ubc->stolen0s = 0; | |
2170 | tasklet_init(&ubc->rcvd_tasklet, | |
5452fee2 | 2171 | read_iso_tasklet, (unsigned long) bcs); |
cf7776dc HL |
2172 | return 1; |
2173 | } | |
2174 | ||
2175 | static void gigaset_reinitbcshw(struct bc_state *bcs) | |
2176 | { | |
2177 | struct bas_bc_state *ubc = bcs->hw.bas; | |
2178 | ||
9d4bee2b | 2179 | bcs->hw.bas->running = 0; |
cf7776dc HL |
2180 | atomic_set(&bcs->hw.bas->corrbytes, 0); |
2181 | bcs->hw.bas->numsub = 0; | |
2182 | spin_lock_init(&ubc->isooutlock); | |
2183 | spin_lock_init(&ubc->isoinlock); | |
2184 | ubc->loststatus = -EINPROGRESS; | |
2185 | } | |
2186 | ||
2187 | static void gigaset_freecshw(struct cardstate *cs) | |
2188 | { | |
73a88814 | 2189 | /* timers, URBs and rcvbuf are disposed of in disconnect */ |
170ebf85 | 2190 | kfree(cs->hw.bas->int_in_buf); |
cf7776dc | 2191 | kfree(cs->hw.bas); |
73a88814 | 2192 | cs->hw.bas = NULL; |
cf7776dc HL |
2193 | } |
2194 | ||
2195 | static int gigaset_initcshw(struct cardstate *cs) | |
2196 | { | |
2197 | struct bas_cardstate *ucs; | |
2198 | ||
2199 | cs->hw.bas = ucs = kmalloc(sizeof *ucs, GFP_KERNEL); | |
c8770dca TS |
2200 | if (!ucs) { |
2201 | pr_err("out of memory\n"); | |
cf7776dc | 2202 | return 0; |
c8770dca | 2203 | } |
170ebf85 TS |
2204 | ucs->int_in_buf = kmalloc(IP_MSGSIZE, GFP_KERNEL); |
2205 | if (!ucs->int_in_buf) { | |
2206 | kfree(ucs); | |
2207 | pr_err("out of memory\n"); | |
2208 | return 0; | |
2209 | } | |
cf7776dc HL |
2210 | |
2211 | ucs->urb_cmd_in = NULL; | |
2212 | ucs->urb_cmd_out = NULL; | |
2213 | ucs->rcvbuf = NULL; | |
2214 | ucs->rcvbuf_size = 0; | |
2215 | ||
2216 | spin_lock_init(&ucs->lock); | |
2217 | ucs->pending = 0; | |
2218 | ||
9d4bee2b | 2219 | ucs->basstate = 0; |
1d5a9edc TS |
2220 | setup_timer(&ucs->timer_ctrl, req_timeout, (unsigned long) cs); |
2221 | setup_timer(&ucs->timer_atrdy, atrdy_timeout, (unsigned long) cs); | |
2222 | setup_timer(&ucs->timer_cmd_in, cmd_in_timeout, (unsigned long) cs); | |
c9c0c304 | 2223 | setup_timer(&ucs->timer_int_in, int_in_resubmit, (unsigned long) cs); |
024fd299 | 2224 | init_waitqueue_head(&ucs->waitqueue); |
c9c0c304 | 2225 | INIT_WORK(&ucs->int_in_wq, int_in_work); |
cf7776dc HL |
2226 | |
2227 | return 1; | |
2228 | } | |
2229 | ||
2230 | /* freeurbs | |
2231 | * unlink and deallocate all URBs unconditionally | |
2232 | * caller must make sure that no commands are still in progress | |
2233 | * parameter: | |
2234 | * cs controller state structure | |
2235 | */ | |
2236 | static void freeurbs(struct cardstate *cs) | |
2237 | { | |
d48c7784 | 2238 | struct bas_cardstate *ucs = cs->hw.bas; |
cf7776dc HL |
2239 | struct bas_bc_state *ubc; |
2240 | int i, j; | |
2241 | ||
39f07223 | 2242 | gig_dbg(DEBUG_INIT, "%s: killing URBs", __func__); |
c652cbd8 | 2243 | for (j = 0; j < BAS_CHANNELS; ++j) { |
cf7776dc | 2244 | ubc = cs->bcs[j].hw.bas; |
39f07223 TS |
2245 | for (i = 0; i < BAS_OUTURBS; ++i) { |
2246 | usb_kill_urb(ubc->isoouturbs[i].urb); | |
2247 | usb_free_urb(ubc->isoouturbs[i].urb); | |
2248 | ubc->isoouturbs[i].urb = NULL; | |
2249 | } | |
2250 | for (i = 0; i < BAS_INURBS; ++i) { | |
2251 | usb_kill_urb(ubc->isoinurbs[i]); | |
2252 | usb_free_urb(ubc->isoinurbs[i]); | |
2253 | ubc->isoinurbs[i] = NULL; | |
2254 | } | |
cf7776dc | 2255 | } |
39f07223 TS |
2256 | usb_kill_urb(ucs->urb_int_in); |
2257 | usb_free_urb(ucs->urb_int_in); | |
2258 | ucs->urb_int_in = NULL; | |
2259 | usb_kill_urb(ucs->urb_cmd_out); | |
2260 | usb_free_urb(ucs->urb_cmd_out); | |
2261 | ucs->urb_cmd_out = NULL; | |
2262 | usb_kill_urb(ucs->urb_cmd_in); | |
2263 | usb_free_urb(ucs->urb_cmd_in); | |
2264 | ucs->urb_cmd_in = NULL; | |
2265 | usb_kill_urb(ucs->urb_ctrl); | |
2266 | usb_free_urb(ucs->urb_ctrl); | |
2267 | ucs->urb_ctrl = NULL; | |
cf7776dc HL |
2268 | } |
2269 | ||
2270 | /* gigaset_probe | |
2271 | * This function is called when a new USB device is connected. | |
2272 | * It checks whether the new device is handled by this driver. | |
2273 | */ | |
2274 | static int gigaset_probe(struct usb_interface *interface, | |
2275 | const struct usb_device_id *id) | |
2276 | { | |
2277 | struct usb_host_interface *hostif; | |
2278 | struct usb_device *udev = interface_to_usbdev(interface); | |
2279 | struct cardstate *cs = NULL; | |
2280 | struct bas_cardstate *ucs = NULL; | |
2281 | struct bas_bc_state *ubc; | |
2282 | struct usb_endpoint_descriptor *endpoint; | |
2283 | int i, j; | |
73a88814 | 2284 | int rc; |
cf7776dc | 2285 | |
1528b18f | 2286 | gig_dbg(DEBUG_INIT, |
784d5858 TS |
2287 | "%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)", |
2288 | __func__, le16_to_cpu(udev->descriptor.idVendor), | |
2289 | le16_to_cpu(udev->descriptor.idProduct)); | |
cf7776dc | 2290 | |
cf7776dc HL |
2291 | /* set required alternate setting */ |
2292 | hostif = interface->cur_altsetting; | |
2293 | if (hostif->desc.bAlternateSetting != 3) { | |
1528b18f | 2294 | gig_dbg(DEBUG_INIT, |
784d5858 TS |
2295 | "%s: wrong alternate setting %d - trying to switch", |
2296 | __func__, hostif->desc.bAlternateSetting); | |
7891adf1 TS |
2297 | if (usb_set_interface(udev, hostif->desc.bInterfaceNumber, 3) |
2298 | < 0) { | |
784d5858 TS |
2299 | dev_warn(&udev->dev, "usb_set_interface failed, " |
2300 | "device %d interface %d altsetting %d\n", | |
2301 | udev->devnum, hostif->desc.bInterfaceNumber, | |
2302 | hostif->desc.bAlternateSetting); | |
cf7776dc HL |
2303 | return -ENODEV; |
2304 | } | |
2305 | hostif = interface->cur_altsetting; | |
2306 | } | |
2307 | ||
2308 | /* Reject application specific interfaces | |
2309 | */ | |
2310 | if (hostif->desc.bInterfaceClass != 255) { | |
784d5858 TS |
2311 | dev_warn(&udev->dev, "%s: bInterfaceClass == %d\n", |
2312 | __func__, hostif->desc.bInterfaceClass); | |
cf7776dc HL |
2313 | return -ENODEV; |
2314 | } | |
2315 | ||
784d5858 TS |
2316 | dev_info(&udev->dev, |
2317 | "%s: Device matched (Vendor: 0x%x, Product: 0x%x)\n", | |
2318 | __func__, le16_to_cpu(udev->descriptor.idVendor), | |
2319 | le16_to_cpu(udev->descriptor.idProduct)); | |
cf7776dc | 2320 | |
e468c048 TS |
2321 | /* allocate memory for our device state and intialize it */ |
2322 | cs = gigaset_initcs(driver, BAS_CHANNELS, 0, 0, cidmode, | |
2323 | GIGASET_MODULENAME); | |
2324 | if (!cs) | |
cf7776dc | 2325 | return -ENODEV; |
cf7776dc | 2326 | ucs = cs->hw.bas; |
784d5858 TS |
2327 | |
2328 | /* save off device structure ptrs for later use */ | |
2329 | usb_get_dev(udev); | |
cf7776dc HL |
2330 | ucs->udev = udev; |
2331 | ucs->interface = interface; | |
b1d47464 | 2332 | cs->dev = &interface->dev; |
cf7776dc HL |
2333 | |
2334 | /* allocate URBs: | |
2335 | * - one for the interrupt pipe | |
2336 | * - three for the different uses of the default control pipe | |
2337 | * - three for each isochronous pipe | |
2338 | */ | |
e94b1766 CL |
2339 | if (!(ucs->urb_int_in = usb_alloc_urb(0, GFP_KERNEL)) || |
2340 | !(ucs->urb_cmd_in = usb_alloc_urb(0, GFP_KERNEL)) || | |
2341 | !(ucs->urb_cmd_out = usb_alloc_urb(0, GFP_KERNEL)) || | |
2342 | !(ucs->urb_ctrl = usb_alloc_urb(0, GFP_KERNEL))) | |
73a88814 | 2343 | goto allocerr; |
cf7776dc | 2344 | |
c652cbd8 | 2345 | for (j = 0; j < BAS_CHANNELS; ++j) { |
cf7776dc | 2346 | ubc = cs->bcs[j].hw.bas; |
73a88814 TS |
2347 | for (i = 0; i < BAS_OUTURBS; ++i) |
2348 | if (!(ubc->isoouturbs[i].urb = | |
e94b1766 | 2349 | usb_alloc_urb(BAS_NUMFRAMES, GFP_KERNEL))) |
73a88814 TS |
2350 | goto allocerr; |
2351 | for (i = 0; i < BAS_INURBS; ++i) | |
2352 | if (!(ubc->isoinurbs[i] = | |
e94b1766 | 2353 | usb_alloc_urb(BAS_NUMFRAMES, GFP_KERNEL))) |
73a88814 | 2354 | goto allocerr; |
cf7776dc HL |
2355 | } |
2356 | ||
2357 | ucs->rcvbuf = NULL; | |
2358 | ucs->rcvbuf_size = 0; | |
2359 | ||
2360 | /* Fill the interrupt urb and send it to the core */ | |
2361 | endpoint = &hostif->endpoint[0].desc; | |
2362 | usb_fill_int_urb(ucs->urb_int_in, udev, | |
784d5858 TS |
2363 | usb_rcvintpipe(udev, |
2364 | (endpoint->bEndpointAddress) & 0x0f), | |
170ebf85 | 2365 | ucs->int_in_buf, IP_MSGSIZE, read_int_callback, cs, |
784d5858 | 2366 | endpoint->bInterval); |
7891adf1 TS |
2367 | rc = usb_submit_urb(ucs->urb_int_in, GFP_KERNEL); |
2368 | if (rc != 0) { | |
784d5858 | 2369 | dev_err(cs->dev, "could not submit interrupt URB: %s\n", |
73a88814 | 2370 | get_usb_rcmsg(rc)); |
cf7776dc HL |
2371 | goto error; |
2372 | } | |
c9c0c304 | 2373 | ucs->retry_int_in = 0; |
cf7776dc HL |
2374 | |
2375 | /* tell the device that the driver is ready */ | |
7891adf1 TS |
2376 | rc = req_submit(cs->bcs, HD_DEVICE_INIT_ACK, 0, 0); |
2377 | if (rc != 0) | |
cf7776dc HL |
2378 | goto error; |
2379 | ||
2380 | /* tell common part that the device is ready */ | |
2381 | if (startmode == SM_LOCKED) | |
9d4bee2b | 2382 | cs->mstate = MS_LOCKED; |
cf7776dc HL |
2383 | |
2384 | /* save address of controller structure */ | |
2385 | usb_set_intfdata(interface, cs); | |
2386 | ||
b1d47464 TS |
2387 | if (!gigaset_start(cs)) |
2388 | goto error; | |
2389 | ||
cf7776dc HL |
2390 | return 0; |
2391 | ||
73a88814 TS |
2392 | allocerr: |
2393 | dev_err(cs->dev, "could not allocate URBs\n"); | |
cf7776dc HL |
2394 | error: |
2395 | freeurbs(cs); | |
69049cc8 | 2396 | usb_set_intfdata(interface, NULL); |
e468c048 | 2397 | gigaset_freecs(cs); |
cf7776dc HL |
2398 | return -ENODEV; |
2399 | } | |
2400 | ||
2401 | /* gigaset_disconnect | |
2402 | * This function is called when the Gigaset base is unplugged. | |
2403 | */ | |
2404 | static void gigaset_disconnect(struct usb_interface *interface) | |
2405 | { | |
2406 | struct cardstate *cs; | |
2407 | struct bas_cardstate *ucs; | |
73a88814 | 2408 | int j; |
cf7776dc | 2409 | |
cf7776dc | 2410 | cs = usb_get_intfdata(interface); |
cf7776dc | 2411 | |
cf7776dc | 2412 | ucs = cs->hw.bas; |
cf7776dc | 2413 | |
b1d47464 | 2414 | dev_info(cs->dev, "disconnecting Gigaset base\n"); |
73a88814 TS |
2415 | |
2416 | /* mark base as not ready, all channels disconnected */ | |
9d4bee2b | 2417 | ucs->basstate = 0; |
73a88814 TS |
2418 | |
2419 | /* tell LL all channels are down */ | |
c652cbd8 | 2420 | for (j = 0; j < BAS_CHANNELS; ++j) |
73a88814 TS |
2421 | gigaset_bchannel_down(cs->bcs + j); |
2422 | ||
2423 | /* stop driver (common part) */ | |
cf7776dc | 2424 | gigaset_stop(cs); |
73a88814 | 2425 | |
c9c0c304 | 2426 | /* stop delayed work and URBs, free ressources */ |
73a88814 TS |
2427 | del_timer_sync(&ucs->timer_ctrl); |
2428 | del_timer_sync(&ucs->timer_atrdy); | |
2429 | del_timer_sync(&ucs->timer_cmd_in); | |
c9c0c304 TS |
2430 | del_timer_sync(&ucs->timer_int_in); |
2431 | cancel_work_sync(&ucs->int_in_wq); | |
cf7776dc | 2432 | freeurbs(cs); |
b1d47464 | 2433 | usb_set_intfdata(interface, NULL); |
cf7776dc HL |
2434 | kfree(ucs->rcvbuf); |
2435 | ucs->rcvbuf = NULL; | |
2436 | ucs->rcvbuf_size = 0; | |
b1d47464 TS |
2437 | usb_put_dev(ucs->udev); |
2438 | ucs->interface = NULL; | |
2439 | ucs->udev = NULL; | |
2440 | cs->dev = NULL; | |
e468c048 | 2441 | gigaset_freecs(cs); |
cf7776dc HL |
2442 | } |
2443 | ||
024fd299 TS |
2444 | /* gigaset_suspend |
2445 | * This function is called before the USB connection is suspended. | |
2446 | */ | |
2447 | static int gigaset_suspend(struct usb_interface *intf, pm_message_t message) | |
2448 | { | |
2449 | struct cardstate *cs = usb_get_intfdata(intf); | |
2450 | struct bas_cardstate *ucs = cs->hw.bas; | |
024fd299 TS |
2451 | int rc; |
2452 | ||
2453 | /* set suspend flag; this stops AT command/response traffic */ | |
2454 | if (update_basstate(ucs, BS_SUSPEND, 0) & BS_SUSPEND) { | |
2455 | gig_dbg(DEBUG_SUSPEND, "already suspended"); | |
2456 | return 0; | |
2457 | } | |
2458 | ||
2459 | /* wait a bit for blocking conditions to go away */ | |
2460 | rc = wait_event_timeout(ucs->waitqueue, | |
9d4bee2b | 2461 | !(ucs->basstate & |
024fd299 TS |
2462 | (BS_B1OPEN|BS_B2OPEN|BS_ATRDPEND|BS_ATWRPEND)), |
2463 | BAS_TIMEOUT*HZ/10); | |
2464 | gig_dbg(DEBUG_SUSPEND, "wait_event_timeout() -> %d", rc); | |
2465 | ||
2466 | /* check for conditions preventing suspend */ | |
9d4bee2b | 2467 | if (ucs->basstate & (BS_B1OPEN|BS_B2OPEN|BS_ATRDPEND|BS_ATWRPEND)) { |
024fd299 | 2468 | dev_warn(cs->dev, "cannot suspend:\n"); |
9d4bee2b | 2469 | if (ucs->basstate & BS_B1OPEN) |
024fd299 | 2470 | dev_warn(cs->dev, " B channel 1 open\n"); |
9d4bee2b | 2471 | if (ucs->basstate & BS_B2OPEN) |
024fd299 | 2472 | dev_warn(cs->dev, " B channel 2 open\n"); |
9d4bee2b | 2473 | if (ucs->basstate & BS_ATRDPEND) |
024fd299 | 2474 | dev_warn(cs->dev, " receiving AT reply\n"); |
9d4bee2b | 2475 | if (ucs->basstate & BS_ATWRPEND) |
024fd299 TS |
2476 | dev_warn(cs->dev, " sending AT command\n"); |
2477 | update_basstate(ucs, 0, BS_SUSPEND); | |
2478 | return -EBUSY; | |
2479 | } | |
2480 | ||
2481 | /* close AT channel if open */ | |
9d4bee2b | 2482 | if (ucs->basstate & BS_ATOPEN) { |
024fd299 TS |
2483 | gig_dbg(DEBUG_SUSPEND, "closing AT channel"); |
2484 | rc = req_submit(cs->bcs, HD_CLOSE_ATCHANNEL, 0, 0); | |
2485 | if (rc) { | |
2486 | update_basstate(ucs, 0, BS_SUSPEND); | |
2487 | return rc; | |
2488 | } | |
2489 | wait_event_timeout(ucs->waitqueue, !ucs->pending, | |
2490 | BAS_TIMEOUT*HZ/10); | |
2491 | /* in case of timeout, proceed anyway */ | |
2492 | } | |
2493 | ||
c9c0c304 | 2494 | /* kill all URBs and delayed work that might still be pending */ |
024fd299 TS |
2495 | usb_kill_urb(ucs->urb_ctrl); |
2496 | usb_kill_urb(ucs->urb_int_in); | |
2497 | del_timer_sync(&ucs->timer_ctrl); | |
1d5a9edc TS |
2498 | del_timer_sync(&ucs->timer_atrdy); |
2499 | del_timer_sync(&ucs->timer_cmd_in); | |
c9c0c304 TS |
2500 | del_timer_sync(&ucs->timer_int_in); |
2501 | cancel_work_sync(&ucs->int_in_wq); | |
024fd299 TS |
2502 | |
2503 | gig_dbg(DEBUG_SUSPEND, "suspend complete"); | |
2504 | return 0; | |
2505 | } | |
2506 | ||
2507 | /* gigaset_resume | |
2508 | * This function is called after the USB connection has been resumed. | |
2509 | */ | |
2510 | static int gigaset_resume(struct usb_interface *intf) | |
2511 | { | |
2512 | struct cardstate *cs = usb_get_intfdata(intf); | |
2513 | struct bas_cardstate *ucs = cs->hw.bas; | |
2514 | int rc; | |
2515 | ||
2516 | /* resubmit interrupt URB for spontaneous messages from base */ | |
2517 | rc = usb_submit_urb(ucs->urb_int_in, GFP_KERNEL); | |
2518 | if (rc) { | |
2519 | dev_err(cs->dev, "could not resubmit interrupt URB: %s\n", | |
2520 | get_usb_rcmsg(rc)); | |
2521 | return rc; | |
2522 | } | |
c9c0c304 | 2523 | ucs->retry_int_in = 0; |
024fd299 TS |
2524 | |
2525 | /* clear suspend flag to reallow activity */ | |
2526 | update_basstate(ucs, 0, BS_SUSPEND); | |
2527 | ||
2528 | gig_dbg(DEBUG_SUSPEND, "resume complete"); | |
2529 | return 0; | |
2530 | } | |
2531 | ||
2532 | /* gigaset_pre_reset | |
2533 | * This function is called before the USB connection is reset. | |
2534 | */ | |
2535 | static int gigaset_pre_reset(struct usb_interface *intf) | |
2536 | { | |
2537 | /* handle just like suspend */ | |
2538 | return gigaset_suspend(intf, PMSG_ON); | |
2539 | } | |
2540 | ||
2541 | /* gigaset_post_reset | |
2542 | * This function is called after the USB connection has been reset. | |
2543 | */ | |
2544 | static int gigaset_post_reset(struct usb_interface *intf) | |
2545 | { | |
2546 | /* FIXME: send HD_DEVICE_INIT_ACK? */ | |
2547 | ||
2548 | /* resume operations */ | |
2549 | return gigaset_resume(intf); | |
2550 | } | |
2551 | ||
2552 | ||
35dc8457 | 2553 | static const struct gigaset_ops gigops = { |
cf7776dc HL |
2554 | gigaset_write_cmd, |
2555 | gigaset_write_room, | |
2556 | gigaset_chars_in_buffer, | |
2557 | gigaset_brkchars, | |
2558 | gigaset_init_bchannel, | |
2559 | gigaset_close_bchannel, | |
2560 | gigaset_initbcshw, | |
2561 | gigaset_freebcshw, | |
2562 | gigaset_reinitbcshw, | |
2563 | gigaset_initcshw, | |
2564 | gigaset_freecshw, | |
2565 | gigaset_set_modem_ctrl, | |
2566 | gigaset_baud_rate, | |
2567 | gigaset_set_line_ctrl, | |
2568 | gigaset_isoc_send_skb, | |
2569 | gigaset_isoc_input, | |
2570 | }; | |
2571 | ||
2572 | /* bas_gigaset_init | |
2573 | * This function is called after the kernel module is loaded. | |
2574 | */ | |
2575 | static int __init bas_gigaset_init(void) | |
2576 | { | |
2577 | int result; | |
2578 | ||
2579 | /* allocate memory for our driver state and intialize it */ | |
7891adf1 TS |
2580 | driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS, |
2581 | GIGASET_MODULENAME, GIGASET_DEVNAME, | |
2582 | &gigops, THIS_MODULE); | |
2583 | if (driver == NULL) | |
cf7776dc HL |
2584 | goto error; |
2585 | ||
cf7776dc HL |
2586 | /* register this driver with the USB subsystem */ |
2587 | result = usb_register(&gigaset_usb_driver); | |
2588 | if (result < 0) { | |
c8770dca | 2589 | pr_err("error %d registering USB driver\n", -result); |
cf7776dc HL |
2590 | goto error; |
2591 | } | |
2592 | ||
c8770dca | 2593 | pr_info(DRIVER_DESC "\n"); |
cf7776dc HL |
2594 | return 0; |
2595 | ||
e468c048 | 2596 | error: |
cf7776dc HL |
2597 | if (driver) |
2598 | gigaset_freedriver(driver); | |
2599 | driver = NULL; | |
2600 | return -1; | |
2601 | } | |
2602 | ||
2603 | /* bas_gigaset_exit | |
2604 | * This function is called before the kernel module is unloaded. | |
2605 | */ | |
2606 | static void __exit bas_gigaset_exit(void) | |
2607 | { | |
e468c048 TS |
2608 | struct bas_cardstate *ucs; |
2609 | int i; | |
73a88814 | 2610 | |
cf7776dc | 2611 | gigaset_blockdriver(driver); /* => probe will fail |
784d5858 TS |
2612 | * => no gigaset_start any more |
2613 | */ | |
cf7776dc | 2614 | |
e468c048 TS |
2615 | /* stop all connected devices */ |
2616 | for (i = 0; i < driver->minors; i++) { | |
2617 | if (gigaset_shutdown(driver->cs + i) < 0) | |
2618 | continue; /* no device */ | |
2619 | /* from now on, no isdn callback should be possible */ | |
2620 | ||
2621 | /* close all still open channels */ | |
2622 | ucs = driver->cs[i].hw.bas; | |
2623 | if (ucs->basstate & BS_B1OPEN) { | |
2624 | gig_dbg(DEBUG_INIT, "closing B1 channel"); | |
2625 | usb_control_msg(ucs->udev, | |
2626 | usb_sndctrlpipe(ucs->udev, 0), | |
2627 | HD_CLOSE_B1CHANNEL, OUT_VENDOR_REQ, | |
2628 | 0, 0, NULL, 0, BAS_TIMEOUT); | |
2629 | } | |
2630 | if (ucs->basstate & BS_B2OPEN) { | |
2631 | gig_dbg(DEBUG_INIT, "closing B2 channel"); | |
2632 | usb_control_msg(ucs->udev, | |
2633 | usb_sndctrlpipe(ucs->udev, 0), | |
2634 | HD_CLOSE_B2CHANNEL, OUT_VENDOR_REQ, | |
2635 | 0, 0, NULL, 0, BAS_TIMEOUT); | |
2636 | } | |
2637 | if (ucs->basstate & BS_ATOPEN) { | |
2638 | gig_dbg(DEBUG_INIT, "closing AT channel"); | |
2639 | usb_control_msg(ucs->udev, | |
2640 | usb_sndctrlpipe(ucs->udev, 0), | |
2641 | HD_CLOSE_ATCHANNEL, OUT_VENDOR_REQ, | |
2642 | 0, 0, NULL, 0, BAS_TIMEOUT); | |
2643 | } | |
2644 | ucs->basstate = 0; | |
cf7776dc HL |
2645 | } |
2646 | ||
2647 | /* deregister this driver with the USB subsystem */ | |
2648 | usb_deregister(&gigaset_usb_driver); | |
2649 | /* this will call the disconnect-callback */ | |
2650 | /* from now on, no disconnect/probe callback should be running */ | |
2651 | ||
cf7776dc HL |
2652 | gigaset_freedriver(driver); |
2653 | driver = NULL; | |
2654 | } | |
2655 | ||
2656 | ||
2657 | module_init(bas_gigaset_init); | |
2658 | module_exit(bas_gigaset_exit); | |
2659 | ||
2660 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
2661 | MODULE_DESCRIPTION(DRIVER_DESC); | |
2662 | MODULE_LICENSE("GPL"); |