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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Driver for ST5481 USB ISDN modem | |
3 | * | |
4 | * Author Frode Isaksen | |
5 | * Copyright 2001 by Frode Isaksen <fisaksen@bewan.com> | |
6 | * 2001 by Kai Germaschewski <kai.germaschewski@gmx.de> | |
7 | * | |
8 | * This software may be used and distributed according to the terms | |
9 | * of the GNU General Public License, incorporated herein by reference. | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <linux/init.h> | |
14 | #include <linux/usb.h> | |
15 | #include <linux/slab.h> | |
16 | #include "st5481.h" | |
17 | ||
672c3fd9 AB |
18 | static int st5481_isoc_flatten(struct urb *urb); |
19 | ||
1da177e4 LT |
20 | /* ====================================================================== |
21 | * control pipe | |
22 | */ | |
23 | ||
24 | /* | |
25 | * Send the next endpoint 0 request stored in the FIFO. | |
26 | * Called either by the completion or by usb_ctrl_msg. | |
27 | */ | |
28 | static void usb_next_ctrl_msg(struct urb *urb, | |
29 | struct st5481_adapter *adapter) | |
30 | { | |
31 | struct st5481_ctrl *ctrl = &adapter->ctrl; | |
32 | int r_index; | |
33 | ||
34 | if (test_and_set_bit(0, &ctrl->busy)) { | |
35 | return; | |
36 | } | |
37 | ||
38 | if ((r_index = fifo_remove(&ctrl->msg_fifo.f)) < 0) { | |
39 | test_and_clear_bit(0,&ctrl->busy); | |
40 | return; | |
41 | } | |
42 | urb->setup_packet = | |
43 | (unsigned char *)&ctrl->msg_fifo.data[r_index]; | |
44 | ||
45 | DBG(1,"request=0x%02x,value=0x%04x,index=%x", | |
46 | ((struct ctrl_msg *)urb->setup_packet)->dr.bRequest, | |
47 | ((struct ctrl_msg *)urb->setup_packet)->dr.wValue, | |
48 | ((struct ctrl_msg *)urb->setup_packet)->dr.wIndex); | |
49 | ||
50 | // Prepare the URB | |
51 | urb->dev = adapter->usb_dev; | |
52 | ||
53 | SUBMIT_URB(urb, GFP_ATOMIC); | |
54 | } | |
55 | ||
56 | /* | |
57 | * Asynchronous endpoint 0 request (async version of usb_control_msg). | |
58 | * The request will be queued up in a FIFO if the endpoint is busy. | |
59 | */ | |
672c3fd9 AB |
60 | static void usb_ctrl_msg(struct st5481_adapter *adapter, |
61 | u8 request, u8 requesttype, u16 value, u16 index, | |
62 | ctrl_complete_t complete, void *context) | |
1da177e4 LT |
63 | { |
64 | struct st5481_ctrl *ctrl = &adapter->ctrl; | |
65 | int w_index; | |
66 | struct ctrl_msg *ctrl_msg; | |
67 | ||
68 | if ((w_index = fifo_add(&ctrl->msg_fifo.f)) < 0) { | |
b6c63937 | 69 | WARNING("control msg FIFO full"); |
1da177e4 LT |
70 | return; |
71 | } | |
72 | ctrl_msg = &ctrl->msg_fifo.data[w_index]; | |
73 | ||
74 | ctrl_msg->dr.bRequestType = requesttype; | |
75 | ctrl_msg->dr.bRequest = request; | |
76 | ctrl_msg->dr.wValue = cpu_to_le16p(&value); | |
77 | ctrl_msg->dr.wIndex = cpu_to_le16p(&index); | |
78 | ctrl_msg->dr.wLength = 0; | |
79 | ctrl_msg->complete = complete; | |
80 | ctrl_msg->context = context; | |
81 | ||
82 | usb_next_ctrl_msg(ctrl->urb, adapter); | |
83 | } | |
84 | ||
85 | /* | |
86 | * Asynchronous endpoint 0 device request. | |
87 | */ | |
88 | void st5481_usb_device_ctrl_msg(struct st5481_adapter *adapter, | |
89 | u8 request, u16 value, | |
90 | ctrl_complete_t complete, void *context) | |
91 | { | |
92 | usb_ctrl_msg(adapter, request, | |
93 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
94 | value, 0, complete, context); | |
95 | } | |
96 | ||
97 | /* | |
98 | * Asynchronous pipe reset (async version of usb_clear_halt). | |
99 | */ | |
100 | void st5481_usb_pipe_reset(struct st5481_adapter *adapter, | |
101 | u_char pipe, | |
102 | ctrl_complete_t complete, void *context) | |
103 | { | |
104 | DBG(1,"pipe=%02x",pipe); | |
105 | ||
106 | usb_ctrl_msg(adapter, | |
107 | USB_REQ_CLEAR_FEATURE, USB_DIR_OUT | USB_RECIP_ENDPOINT, | |
108 | 0, pipe, complete, context); | |
109 | } | |
110 | ||
111 | ||
112 | /* | |
113 | Physical level functions | |
114 | */ | |
115 | ||
116 | void st5481_ph_command(struct st5481_adapter *adapter, unsigned int command) | |
117 | { | |
118 | DBG(8,"command=%s", ST5481_CMD_string(command)); | |
119 | ||
120 | st5481_usb_device_ctrl_msg(adapter, TXCI, command, NULL, NULL); | |
121 | } | |
122 | ||
123 | /* | |
124 | * The request on endpoint 0 has completed. | |
125 | * Call the user provided completion routine and try | |
126 | * to send the next request. | |
127 | */ | |
7d12e780 | 128 | static void usb_ctrl_complete(struct urb *urb) |
1da177e4 LT |
129 | { |
130 | struct st5481_adapter *adapter = urb->context; | |
131 | struct st5481_ctrl *ctrl = &adapter->ctrl; | |
132 | struct ctrl_msg *ctrl_msg; | |
133 | ||
134 | if (unlikely(urb->status < 0)) { | |
61ffcafa KK |
135 | switch (urb->status) { |
136 | case -ENOENT: | |
137 | case -ESHUTDOWN: | |
138 | case -ECONNRESET: | |
139 | DBG(1,"urb killed status %d", urb->status); | |
140 | return; // Give up | |
141 | default: | |
b6c63937 | 142 | WARNING("urb status %d",urb->status); |
61ffcafa | 143 | break; |
1da177e4 LT |
144 | } |
145 | } | |
146 | ||
147 | ctrl_msg = (struct ctrl_msg *)urb->setup_packet; | |
148 | ||
149 | if (ctrl_msg->dr.bRequest == USB_REQ_CLEAR_FEATURE) { | |
150 | /* Special case handling for pipe reset */ | |
151 | le16_to_cpus(&ctrl_msg->dr.wIndex); | |
3444b26a | 152 | usb_reset_endpoint(adapter->usb_dev, ctrl_msg->dr.wIndex); |
1da177e4 LT |
153 | } |
154 | ||
155 | if (ctrl_msg->complete) | |
156 | ctrl_msg->complete(ctrl_msg->context); | |
157 | ||
158 | clear_bit(0, &ctrl->busy); | |
159 | ||
160 | // Try to send next control message | |
161 | usb_next_ctrl_msg(urb, adapter); | |
162 | return; | |
163 | } | |
164 | ||
165 | /* ====================================================================== | |
166 | * interrupt pipe | |
167 | */ | |
168 | ||
169 | /* | |
170 | * The interrupt endpoint will be called when any | |
171 | * of the 6 registers changes state (depending on masks). | |
172 | * Decode the register values and schedule a private event. | |
173 | * Called at interrupt. | |
174 | */ | |
7d12e780 | 175 | static void usb_int_complete(struct urb *urb) |
1da177e4 LT |
176 | { |
177 | u8 *data = urb->transfer_buffer; | |
178 | u8 irqbyte; | |
179 | struct st5481_adapter *adapter = urb->context; | |
180 | int j; | |
181 | int status; | |
182 | ||
183 | switch (urb->status) { | |
61ffcafa KK |
184 | case 0: |
185 | /* success */ | |
186 | break; | |
187 | case -ECONNRESET: | |
188 | case -ENOENT: | |
189 | case -ESHUTDOWN: | |
190 | /* this urb is terminated, clean up */ | |
191 | DBG(2, "urb shutting down with status: %d", urb->status); | |
192 | return; | |
193 | default: | |
b6c63937 | 194 | WARNING("nonzero urb status received: %d", urb->status); |
61ffcafa | 195 | goto exit; |
1da177e4 LT |
196 | } |
197 | ||
198 | ||
61ffcafa | 199 | DBG_PACKET(2, data, INT_PKT_SIZE); |
1da177e4 LT |
200 | |
201 | if (urb->actual_length == 0) { | |
202 | goto exit; | |
203 | } | |
204 | ||
205 | irqbyte = data[MPINT]; | |
206 | if (irqbyte & DEN_INT) | |
207 | FsmEvent(&adapter->d_out.fsm, EV_DOUT_DEN, NULL); | |
208 | ||
209 | if (irqbyte & DCOLL_INT) | |
210 | FsmEvent(&adapter->d_out.fsm, EV_DOUT_COLL, NULL); | |
211 | ||
212 | irqbyte = data[FFINT_D]; | |
213 | if (irqbyte & OUT_UNDERRUN) | |
214 | FsmEvent(&adapter->d_out.fsm, EV_DOUT_UNDERRUN, NULL); | |
215 | ||
216 | if (irqbyte & OUT_DOWN) | |
217 | ;// printk("OUT_DOWN\n"); | |
218 | ||
219 | irqbyte = data[MPINT]; | |
220 | if (irqbyte & RXCI_INT) | |
221 | FsmEvent(&adapter->l1m, data[CCIST] & 0x0f, NULL); | |
222 | ||
223 | for (j = 0; j < 2; j++) | |
224 | adapter->bcs[j].b_out.flow_event |= data[FFINT_B1 + j]; | |
225 | ||
226 | urb->actual_length = 0; | |
227 | ||
228 | exit: | |
229 | status = usb_submit_urb (urb, GFP_ATOMIC); | |
230 | if (status) | |
b6c63937 | 231 | WARNING("usb_submit_urb failed with result %d", status); |
1da177e4 LT |
232 | } |
233 | ||
234 | /* ====================================================================== | |
235 | * initialization | |
236 | */ | |
237 | ||
238 | int st5481_setup_usb(struct st5481_adapter *adapter) | |
239 | { | |
240 | struct usb_device *dev = adapter->usb_dev; | |
241 | struct st5481_ctrl *ctrl = &adapter->ctrl; | |
242 | struct st5481_intr *intr = &adapter->intr; | |
243 | struct usb_interface *intf; | |
244 | struct usb_host_interface *altsetting = NULL; | |
245 | struct usb_host_endpoint *endpoint; | |
246 | int status; | |
247 | struct urb *urb; | |
248 | u8 *buf; | |
249 | ||
61ffcafa | 250 | DBG(2,""); |
1da177e4 LT |
251 | |
252 | if ((status = usb_reset_configuration (dev)) < 0) { | |
b6c63937 | 253 | WARNING("reset_configuration failed,status=%d",status); |
1da177e4 LT |
254 | return status; |
255 | } | |
256 | ||
257 | intf = usb_ifnum_to_if(dev, 0); | |
258 | if (intf) | |
259 | altsetting = usb_altnum_to_altsetting(intf, 3); | |
260 | if (!altsetting) | |
261 | return -ENXIO; | |
262 | ||
263 | // Check if the config is sane | |
264 | if ( altsetting->desc.bNumEndpoints != 7 ) { | |
b6c63937 | 265 | WARNING("expecting 7 got %d endpoints!", altsetting->desc.bNumEndpoints); |
1da177e4 LT |
266 | return -EINVAL; |
267 | } | |
268 | ||
269 | // The descriptor is wrong for some early samples of the ST5481 chip | |
270 | altsetting->endpoint[3].desc.wMaxPacketSize = __constant_cpu_to_le16(32); | |
271 | altsetting->endpoint[4].desc.wMaxPacketSize = __constant_cpu_to_le16(32); | |
272 | ||
273 | // Use alternative setting 3 on interface 0 to have 2B+D | |
274 | if ((status = usb_set_interface (dev, 0, 3)) < 0) { | |
b6c63937 | 275 | WARNING("usb_set_interface failed,status=%d",status); |
1da177e4 LT |
276 | return status; |
277 | } | |
278 | ||
279 | // Allocate URB for control endpoint | |
280 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
281 | if (!urb) { | |
282 | return -ENOMEM; | |
283 | } | |
284 | ctrl->urb = urb; | |
285 | ||
286 | // Fill the control URB | |
287 | usb_fill_control_urb (urb, dev, | |
288 | usb_sndctrlpipe(dev, 0), | |
289 | NULL, NULL, 0, usb_ctrl_complete, adapter); | |
290 | ||
291 | ||
292 | fifo_init(&ctrl->msg_fifo.f, ARRAY_SIZE(ctrl->msg_fifo.data)); | |
293 | ||
294 | // Allocate URBs and buffers for interrupt endpoint | |
295 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
296 | if (!urb) { | |
297 | return -ENOMEM; | |
298 | } | |
299 | intr->urb = urb; | |
300 | ||
301 | buf = kmalloc(INT_PKT_SIZE, GFP_KERNEL); | |
302 | if (!buf) { | |
303 | return -ENOMEM; | |
304 | } | |
305 | ||
306 | endpoint = &altsetting->endpoint[EP_INT-1]; | |
307 | ||
308 | // Fill the interrupt URB | |
309 | usb_fill_int_urb(urb, dev, | |
310 | usb_rcvintpipe(dev, endpoint->desc.bEndpointAddress), | |
311 | buf, INT_PKT_SIZE, | |
312 | usb_int_complete, adapter, | |
313 | endpoint->desc.bInterval); | |
314 | ||
315 | return 0; | |
316 | } | |
317 | ||
318 | /* | |
319 | * Release buffers and URBs for the interrupt and control | |
320 | * endpoint. | |
321 | */ | |
322 | void st5481_release_usb(struct st5481_adapter *adapter) | |
323 | { | |
324 | struct st5481_intr *intr = &adapter->intr; | |
325 | struct st5481_ctrl *ctrl = &adapter->ctrl; | |
326 | ||
327 | DBG(1,""); | |
328 | ||
329 | // Stop and free Control and Interrupt URBs | |
61ffcafa | 330 | usb_kill_urb(ctrl->urb); |
3c7208f2 | 331 | kfree(ctrl->urb->transfer_buffer); |
1da177e4 | 332 | usb_free_urb(ctrl->urb); |
61ffcafa | 333 | ctrl->urb = NULL; |
1da177e4 | 334 | |
61ffcafa | 335 | usb_kill_urb(intr->urb); |
3c7208f2 | 336 | kfree(intr->urb->transfer_buffer); |
1da177e4 | 337 | usb_free_urb(intr->urb); |
f3429545 | 338 | intr->urb = NULL; |
1da177e4 LT |
339 | } |
340 | ||
341 | /* | |
342 | * Initialize the adapter. | |
343 | */ | |
344 | void st5481_start(struct st5481_adapter *adapter) | |
345 | { | |
346 | static const u8 init_cmd_table[]={ | |
347 | SET_DEFAULT,0, | |
348 | STT,0, | |
349 | SDA_MIN,0x0d, | |
350 | SDA_MAX,0x29, | |
351 | SDELAY_VALUE,0x14, | |
352 | GPIO_DIR,0x01, | |
353 | GPIO_OUT,RED_LED, | |
354 | // FFCTRL_OUT_D,4, | |
355 | // FFCTRH_OUT_D,12, | |
356 | FFCTRL_OUT_B1,6, | |
357 | FFCTRH_OUT_B1,20, | |
358 | FFCTRL_OUT_B2,6, | |
359 | FFCTRH_OUT_B2,20, | |
360 | MPMSK,RXCI_INT+DEN_INT+DCOLL_INT, | |
361 | 0 | |
362 | }; | |
363 | struct st5481_intr *intr = &adapter->intr; | |
364 | int i = 0; | |
365 | u8 request,value; | |
366 | ||
367 | DBG(8,""); | |
368 | ||
369 | adapter->leds = RED_LED; | |
370 | ||
371 | // Start receiving on the interrupt endpoint | |
372 | SUBMIT_URB(intr->urb, GFP_KERNEL); | |
373 | ||
374 | while ((request = init_cmd_table[i++])) { | |
375 | value = init_cmd_table[i++]; | |
376 | st5481_usb_device_ctrl_msg(adapter, request, value, NULL, NULL); | |
377 | } | |
378 | st5481_ph_command(adapter, ST5481_CMD_PUP); | |
379 | } | |
380 | ||
381 | /* | |
382 | * Reset the adapter to default values. | |
383 | */ | |
384 | void st5481_stop(struct st5481_adapter *adapter) | |
385 | { | |
386 | DBG(8,""); | |
387 | ||
388 | st5481_usb_device_ctrl_msg(adapter, SET_DEFAULT, 0, NULL, NULL); | |
389 | } | |
390 | ||
391 | /* ====================================================================== | |
392 | * isochronous USB helpers | |
393 | */ | |
394 | ||
395 | static void | |
396 | fill_isoc_urb(struct urb *urb, struct usb_device *dev, | |
397 | unsigned int pipe, void *buf, int num_packets, | |
398 | int packet_size, usb_complete_t complete, | |
399 | void *context) | |
400 | { | |
401 | int k; | |
402 | ||
1da177e4 LT |
403 | urb->dev=dev; |
404 | urb->pipe=pipe; | |
61ffcafa | 405 | urb->interval = 1; |
1da177e4 LT |
406 | urb->transfer_buffer=buf; |
407 | urb->number_of_packets = num_packets; | |
408 | urb->transfer_buffer_length=num_packets*packet_size; | |
409 | urb->actual_length = 0; | |
410 | urb->complete=complete; | |
411 | urb->context=context; | |
412 | urb->transfer_flags=URB_ISO_ASAP; | |
413 | for (k = 0; k < num_packets; k++) { | |
414 | urb->iso_frame_desc[k].offset = packet_size * k; | |
415 | urb->iso_frame_desc[k].length = packet_size; | |
416 | urb->iso_frame_desc[k].actual_length = 0; | |
417 | } | |
418 | } | |
419 | ||
420 | int | |
421 | st5481_setup_isocpipes(struct urb* urb[2], struct usb_device *dev, | |
422 | unsigned int pipe, int num_packets, | |
423 | int packet_size, int buf_size, | |
424 | usb_complete_t complete, void *context) | |
425 | { | |
426 | int j, retval; | |
427 | unsigned char *buf; | |
428 | ||
429 | for (j = 0; j < 2; j++) { | |
430 | retval = -ENOMEM; | |
431 | urb[j] = usb_alloc_urb(num_packets, GFP_KERNEL); | |
432 | if (!urb[j]) | |
433 | goto err; | |
434 | ||
435 | // Allocate memory for 2000bytes/sec (16Kb/s) | |
436 | buf = kmalloc(buf_size, GFP_KERNEL); | |
437 | if (!buf) | |
438 | goto err; | |
439 | ||
440 | // Fill the isochronous URB | |
441 | fill_isoc_urb(urb[j], dev, pipe, buf, | |
442 | num_packets, packet_size, complete, | |
443 | context); | |
444 | } | |
445 | return 0; | |
446 | ||
447 | err: | |
448 | for (j = 0; j < 2; j++) { | |
449 | if (urb[j]) { | |
3c7208f2 | 450 | kfree(urb[j]->transfer_buffer); |
61ffcafa | 451 | urb[j]->transfer_buffer = NULL; |
1da177e4 | 452 | usb_free_urb(urb[j]); |
61ffcafa | 453 | urb[j] = NULL; |
1da177e4 LT |
454 | } |
455 | } | |
456 | return retval; | |
457 | } | |
458 | ||
459 | void st5481_release_isocpipes(struct urb* urb[2]) | |
460 | { | |
461 | int j; | |
462 | ||
463 | for (j = 0; j < 2; j++) { | |
61ffcafa | 464 | usb_kill_urb(urb[j]); |
3c7208f2 | 465 | kfree(urb[j]->transfer_buffer); |
1da177e4 | 466 | usb_free_urb(urb[j]); |
61ffcafa | 467 | urb[j] = NULL; |
1da177e4 LT |
468 | } |
469 | } | |
470 | ||
471 | /* | |
472 | * Decode frames received on the B/D channel. | |
473 | * Note that this function will be called continously | |
474 | * with 64Kbit/s / 16Kbit/s of data and hence it will be | |
475 | * called 50 times per second with 20 ISOC descriptors. | |
476 | * Called at interrupt. | |
477 | */ | |
7d12e780 | 478 | static void usb_in_complete(struct urb *urb) |
1da177e4 LT |
479 | { |
480 | struct st5481_in *in = urb->context; | |
481 | unsigned char *ptr; | |
482 | struct sk_buff *skb; | |
483 | int len, count, status; | |
484 | ||
485 | if (unlikely(urb->status < 0)) { | |
61ffcafa KK |
486 | switch (urb->status) { |
487 | case -ENOENT: | |
488 | case -ESHUTDOWN: | |
489 | case -ECONNRESET: | |
490 | DBG(1,"urb killed status %d", urb->status); | |
491 | return; // Give up | |
492 | default: | |
b6c63937 | 493 | WARNING("urb status %d",urb->status); |
61ffcafa | 494 | break; |
1da177e4 LT |
495 | } |
496 | } | |
497 | ||
498 | DBG_ISO_PACKET(0x80,urb); | |
499 | ||
500 | len = st5481_isoc_flatten(urb); | |
501 | ptr = urb->transfer_buffer; | |
502 | while (len > 0) { | |
503 | if (in->mode == L1_MODE_TRANS) { | |
504 | memcpy(in->rcvbuf, ptr, len); | |
505 | status = len; | |
506 | len = 0; | |
507 | } else { | |
508 | status = isdnhdlc_decode(&in->hdlc_state, ptr, len, &count, | |
509 | in->rcvbuf, in->bufsize); | |
510 | ptr += count; | |
511 | len -= count; | |
512 | } | |
513 | ||
514 | if (status > 0) { | |
515 | // Good frame received | |
516 | DBG(4,"count=%d",status); | |
517 | DBG_PACKET(0x400, in->rcvbuf, status); | |
518 | if (!(skb = dev_alloc_skb(status))) { | |
b6c63937 | 519 | WARNING("receive out of memory\n"); |
1da177e4 LT |
520 | break; |
521 | } | |
522 | memcpy(skb_put(skb, status), in->rcvbuf, status); | |
523 | in->hisax_if->l1l2(in->hisax_if, PH_DATA | INDICATION, skb); | |
524 | } else if (status == -HDLC_CRC_ERROR) { | |
525 | INFO("CRC error"); | |
526 | } else if (status == -HDLC_FRAMING_ERROR) { | |
527 | INFO("framing error"); | |
528 | } else if (status == -HDLC_LENGTH_ERROR) { | |
529 | INFO("length error"); | |
530 | } | |
531 | } | |
532 | ||
533 | // Prepare URB for next transfer | |
534 | urb->dev = in->adapter->usb_dev; | |
535 | urb->actual_length = 0; | |
536 | ||
537 | SUBMIT_URB(urb, GFP_ATOMIC); | |
538 | } | |
539 | ||
540 | int st5481_setup_in(struct st5481_in *in) | |
541 | { | |
542 | struct usb_device *dev = in->adapter->usb_dev; | |
543 | int retval; | |
544 | ||
545 | DBG(4,""); | |
546 | ||
547 | in->rcvbuf = kmalloc(in->bufsize, GFP_KERNEL); | |
548 | retval = -ENOMEM; | |
549 | if (!in->rcvbuf) | |
550 | goto err; | |
551 | ||
552 | retval = st5481_setup_isocpipes(in->urb, dev, | |
553 | usb_rcvisocpipe(dev, in->ep), | |
554 | in->num_packets, in->packet_size, | |
555 | in->num_packets * in->packet_size, | |
556 | usb_in_complete, in); | |
557 | if (retval) | |
558 | goto err_free; | |
559 | return 0; | |
560 | ||
561 | err_free: | |
562 | kfree(in->rcvbuf); | |
563 | err: | |
564 | return retval; | |
565 | } | |
566 | ||
567 | void st5481_release_in(struct st5481_in *in) | |
568 | { | |
569 | DBG(2,""); | |
570 | ||
571 | st5481_release_isocpipes(in->urb); | |
572 | } | |
573 | ||
574 | /* | |
575 | * Make the transfer_buffer contiguous by | |
576 | * copying from the iso descriptors if necessary. | |
577 | */ | |
672c3fd9 | 578 | static int st5481_isoc_flatten(struct urb *urb) |
1da177e4 LT |
579 | { |
580 | struct usb_iso_packet_descriptor *pipd,*pend; | |
581 | unsigned char *src,*dst; | |
582 | unsigned int len; | |
583 | ||
584 | if (urb->status < 0) { | |
585 | return urb->status; | |
586 | } | |
587 | for (pipd = &urb->iso_frame_desc[0], | |
588 | pend = &urb->iso_frame_desc[urb->number_of_packets], | |
589 | dst = urb->transfer_buffer; | |
590 | pipd < pend; | |
591 | pipd++) { | |
592 | ||
593 | if (pipd->status < 0) { | |
594 | return (pipd->status); | |
595 | } | |
596 | ||
597 | len = pipd->actual_length; | |
598 | pipd->actual_length = 0; | |
599 | src = urb->transfer_buffer+pipd->offset; | |
600 | ||
601 | if (src != dst) { | |
602 | // Need to copy since isoc buffers not full | |
603 | while (len--) { | |
604 | *dst++ = *src++; | |
605 | } | |
606 | } else { | |
607 | // No need to copy, just update destination buffer | |
608 | dst += len; | |
609 | } | |
610 | } | |
611 | // Return size of flattened buffer | |
612 | return (dst - (unsigned char *)urb->transfer_buffer); | |
613 | } | |
614 | ||
615 | static void st5481_start_rcv(void *context) | |
616 | { | |
617 | struct st5481_in *in = context; | |
618 | struct st5481_adapter *adapter = in->adapter; | |
619 | ||
620 | DBG(4,""); | |
621 | ||
622 | in->urb[0]->dev = adapter->usb_dev; | |
623 | SUBMIT_URB(in->urb[0], GFP_KERNEL); | |
624 | ||
625 | in->urb[1]->dev = adapter->usb_dev; | |
626 | SUBMIT_URB(in->urb[1], GFP_KERNEL); | |
627 | } | |
628 | ||
629 | void st5481_in_mode(struct st5481_in *in, int mode) | |
630 | { | |
631 | if (in->mode == mode) | |
632 | return; | |
633 | ||
634 | in->mode = mode; | |
635 | ||
636 | usb_unlink_urb(in->urb[0]); | |
637 | usb_unlink_urb(in->urb[1]); | |
638 | ||
639 | if (in->mode != L1_MODE_NULL) { | |
640 | if (in->mode != L1_MODE_TRANS) | |
641 | isdnhdlc_rcv_init(&in->hdlc_state, | |
642 | in->mode == L1_MODE_HDLC_56K); | |
643 | ||
644 | st5481_usb_pipe_reset(in->adapter, in->ep, NULL, NULL); | |
645 | st5481_usb_device_ctrl_msg(in->adapter, in->counter, | |
646 | in->packet_size, | |
647 | NULL, NULL); | |
648 | st5481_start_rcv(in); | |
649 | } else { | |
650 | st5481_usb_device_ctrl_msg(in->adapter, in->counter, | |
651 | 0, NULL, NULL); | |
652 | } | |
653 | } | |
654 |