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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> | |
475be4d8 | 7 | * |
1da177e4 LT |
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> | |
5a0e3ad6 | 14 | #include <linux/gfp.h> |
1da177e4 | 15 | #include <linux/usb.h> |
1da177e4 LT |
16 | #include <linux/netdevice.h> |
17 | #include "st5481.h" | |
18 | ||
19 | static void ph_connect(struct st5481_adapter *adapter); | |
20 | static void ph_disconnect(struct st5481_adapter *adapter); | |
21 | ||
22 | static struct Fsm l1fsm; | |
23 | ||
24 | static char *strL1State[] = | |
25 | { | |
26 | "ST_L1_F3", | |
27 | "ST_L1_F4", | |
28 | "ST_L1_F6", | |
29 | "ST_L1_F7", | |
30 | "ST_L1_F8", | |
31 | }; | |
32 | ||
33 | static char *strL1Event[] = | |
34 | { | |
475be4d8 JP |
35 | "EV_IND_DP", |
36 | "EV_IND_1", | |
37 | "EV_IND_2", | |
38 | "EV_IND_3", | |
39 | "EV_IND_RSY", | |
40 | "EV_IND_5", | |
41 | "EV_IND_6", | |
42 | "EV_IND_7", | |
43 | "EV_IND_AP", | |
44 | "EV_IND_9", | |
45 | "EV_IND_10", | |
46 | "EV_IND_11", | |
1da177e4 LT |
47 | "EV_IND_AI8", |
48 | "EV_IND_AI10", | |
49 | "EV_IND_AIL", | |
475be4d8 | 50 | "EV_IND_DI", |
1da177e4 LT |
51 | "EV_PH_ACTIVATE_REQ", |
52 | "EV_PH_DEACTIVATE_REQ", | |
53 | "EV_TIMER3", | |
54 | }; | |
55 | ||
56 | static inline void D_L1L2(struct st5481_adapter *adapter, int pr, void *arg) | |
57 | { | |
58 | struct hisax_if *ifc = (struct hisax_if *) &adapter->hisax_d_if; | |
59 | ||
60 | ifc->l1l2(ifc, pr, arg); | |
61 | } | |
62 | ||
63 | static void | |
64 | l1_go_f3(struct FsmInst *fi, int event, void *arg) | |
65 | { | |
66 | struct st5481_adapter *adapter = fi->userdata; | |
67 | ||
68 | if (fi->state == ST_L1_F7) | |
69 | ph_disconnect(adapter); | |
475be4d8 | 70 | |
1da177e4 LT |
71 | FsmChangeState(fi, ST_L1_F3); |
72 | D_L1L2(adapter, PH_DEACTIVATE | INDICATION, NULL); | |
73 | } | |
74 | ||
75 | static void | |
76 | l1_go_f6(struct FsmInst *fi, int event, void *arg) | |
77 | { | |
78 | struct st5481_adapter *adapter = fi->userdata; | |
79 | ||
80 | if (fi->state == ST_L1_F7) | |
81 | ph_disconnect(adapter); | |
82 | ||
83 | FsmChangeState(fi, ST_L1_F6); | |
84 | } | |
85 | ||
86 | static void | |
87 | l1_go_f7(struct FsmInst *fi, int event, void *arg) | |
88 | { | |
89 | struct st5481_adapter *adapter = fi->userdata; | |
90 | ||
91 | FsmDelTimer(&adapter->timer, 0); | |
92 | ph_connect(adapter); | |
93 | FsmChangeState(fi, ST_L1_F7); | |
94 | D_L1L2(adapter, PH_ACTIVATE | INDICATION, NULL); | |
95 | } | |
96 | ||
97 | static void | |
98 | l1_go_f8(struct FsmInst *fi, int event, void *arg) | |
99 | { | |
100 | struct st5481_adapter *adapter = fi->userdata; | |
101 | ||
102 | if (fi->state == ST_L1_F7) | |
103 | ph_disconnect(adapter); | |
104 | ||
105 | FsmChangeState(fi, ST_L1_F8); | |
106 | } | |
107 | ||
108 | static void | |
109 | l1_timer3(struct FsmInst *fi, int event, void *arg) | |
110 | { | |
111 | struct st5481_adapter *adapter = fi->userdata; | |
112 | ||
113 | st5481_ph_command(adapter, ST5481_CMD_DR); | |
114 | FsmChangeState(fi, ST_L1_F3); | |
115 | D_L1L2(adapter, PH_DEACTIVATE | INDICATION, NULL); | |
116 | } | |
117 | ||
118 | static void | |
119 | l1_ignore(struct FsmInst *fi, int event, void *arg) | |
120 | { | |
121 | } | |
122 | ||
123 | static void | |
124 | l1_activate(struct FsmInst *fi, int event, void *arg) | |
125 | { | |
126 | struct st5481_adapter *adapter = fi->userdata; | |
127 | ||
128 | st5481_ph_command(adapter, ST5481_CMD_DR); | |
129 | st5481_ph_command(adapter, ST5481_CMD_PUP); | |
130 | FsmRestartTimer(&adapter->timer, TIMER3_VALUE, EV_TIMER3, NULL, 2); | |
131 | st5481_ph_command(adapter, ST5481_CMD_AR8); | |
132 | FsmChangeState(fi, ST_L1_F4); | |
133 | } | |
134 | ||
135 | static struct FsmNode L1FnList[] __initdata = | |
136 | { | |
137 | {ST_L1_F3, EV_IND_DP, l1_ignore}, | |
138 | {ST_L1_F3, EV_IND_AP, l1_go_f6}, | |
139 | {ST_L1_F3, EV_IND_AI8, l1_go_f7}, | |
140 | {ST_L1_F3, EV_IND_AI10, l1_go_f7}, | |
141 | {ST_L1_F3, EV_PH_ACTIVATE_REQ, l1_activate}, | |
142 | ||
143 | {ST_L1_F4, EV_TIMER3, l1_timer3}, | |
144 | {ST_L1_F4, EV_IND_DP, l1_go_f3}, | |
145 | {ST_L1_F4, EV_IND_AP, l1_go_f6}, | |
146 | {ST_L1_F4, EV_IND_AI8, l1_go_f7}, | |
147 | {ST_L1_F4, EV_IND_AI10, l1_go_f7}, | |
148 | ||
149 | {ST_L1_F6, EV_TIMER3, l1_timer3}, | |
150 | {ST_L1_F6, EV_IND_DP, l1_go_f3}, | |
151 | {ST_L1_F6, EV_IND_AP, l1_ignore}, | |
152 | {ST_L1_F6, EV_IND_AI8, l1_go_f7}, | |
153 | {ST_L1_F6, EV_IND_AI10, l1_go_f7}, | |
154 | {ST_L1_F7, EV_IND_RSY, l1_go_f8}, | |
155 | ||
156 | {ST_L1_F7, EV_IND_DP, l1_go_f3}, | |
157 | {ST_L1_F7, EV_IND_AP, l1_go_f6}, | |
158 | {ST_L1_F7, EV_IND_AI8, l1_ignore}, | |
159 | {ST_L1_F7, EV_IND_AI10, l1_ignore}, | |
160 | {ST_L1_F7, EV_IND_RSY, l1_go_f8}, | |
161 | ||
162 | {ST_L1_F8, EV_TIMER3, l1_timer3}, | |
163 | {ST_L1_F8, EV_IND_DP, l1_go_f3}, | |
164 | {ST_L1_F8, EV_IND_AP, l1_go_f6}, | |
165 | {ST_L1_F8, EV_IND_AI8, l1_go_f8}, | |
166 | {ST_L1_F8, EV_IND_AI10, l1_go_f8}, | |
167 | {ST_L1_F8, EV_IND_RSY, l1_ignore}, | |
168 | }; | |
169 | ||
b9075fa9 | 170 | static __printf(2, 3) |
475be4d8 | 171 | void l1m_debug(struct FsmInst *fi, char *fmt, ...) |
1da177e4 LT |
172 | { |
173 | va_list args; | |
174 | char buf[256]; | |
475be4d8 | 175 | |
1da177e4 | 176 | va_start(args, fmt); |
0b2dd130 | 177 | vsnprintf(buf, sizeof(buf), fmt, args); |
1da177e4 LT |
178 | DBG(8, "%s", buf); |
179 | va_end(args); | |
180 | } | |
181 | ||
182 | /* ====================================================================== | |
183 | * D-Channel out | |
184 | */ | |
185 | ||
186 | /* | |
187 | D OUT state machine: | |
188 | ==================== | |
189 | ||
190 | Transmit short frame (< 16 bytes of encoded data): | |
191 | ||
192 | L1 FRAME D_OUT_STATE USB D CHANNEL | |
193 | -------- ----------- --- --------- | |
475be4d8 JP |
194 | |
195 | FIXME | |
196 | ||
197 | -> [xx..xx] SHORT_INIT -> [7Exx..xxC1C27EFF] | |
198 | SHORT_WAIT_DEN <> OUT_D_COUNTER=16 | |
199 | ||
200 | END_OF_SHORT <- DEN_EVENT -> 7Exx | |
201 | xxxx | |
202 | xxxx | |
203 | xxxx | |
204 | xxxx | |
205 | xxxx | |
206 | C1C1 | |
207 | 7EFF | |
208 | WAIT_FOR_RESET_IDLE <- D_UNDERRUN <- (8ms) | |
209 | IDLE <> Reset pipe | |
210 | ||
211 | ||
1da177e4 LT |
212 | |
213 | Transmit long frame (>= 16 bytes of encoded data): | |
214 | ||
215 | L1 FRAME D_OUT_STATE USB D CHANNEL | |
216 | -------- ----------- --- --------- | |
217 | ||
475be4d8 JP |
218 | -> [xx...xx] IDLE |
219 | WAIT_FOR_STOP <> OUT_D_COUNTER=0 | |
220 | WAIT_FOR_RESET <> Reset pipe | |
221 | STOP | |
222 | INIT_LONG_FRAME -> [7Exx..xx] | |
223 | WAIT_DEN <> OUT_D_COUNTER=16 | |
224 | OUT_NORMAL <- DEN_EVENT -> 7Exx | |
225 | END_OF_FRAME_BUSY -> [xxxx] xxxx | |
226 | END_OF_FRAME_NOT_BUSY -> [xxxx] xxxx | |
227 | -> [xxxx] xxxx | |
228 | -> [C1C2] xxxx | |
229 | -> [7EFF] xxxx | |
230 | xxxx | |
231 | xxxx | |
232 | .... | |
233 | xxxx | |
234 | C1C2 | |
235 | 7EFF | |
236 | <- D_UNDERRUN <- (> 8ms) | |
237 | WAIT_FOR_STOP <> OUT_D_COUNTER=0 | |
238 | WAIT_FOR_RESET <> Reset pipe | |
239 | STOP | |
240 | ||
241 | */ | |
1da177e4 LT |
242 | |
243 | static struct Fsm dout_fsm; | |
244 | ||
245 | static char *strDoutState[] = | |
246 | { | |
247 | "ST_DOUT_NONE", | |
248 | ||
249 | "ST_DOUT_SHORT_INIT", | |
250 | "ST_DOUT_SHORT_WAIT_DEN", | |
251 | ||
252 | "ST_DOUT_LONG_INIT", | |
253 | "ST_DOUT_LONG_WAIT_DEN", | |
254 | "ST_DOUT_NORMAL", | |
255 | ||
256 | "ST_DOUT_WAIT_FOR_UNDERRUN", | |
475be4d8 | 257 | "ST_DOUT_WAIT_FOR_NOT_BUSY", |
1da177e4 LT |
258 | "ST_DOUT_WAIT_FOR_STOP", |
259 | "ST_DOUT_WAIT_FOR_RESET", | |
260 | }; | |
261 | ||
262 | static char *strDoutEvent[] = | |
263 | { | |
264 | "EV_DOUT_START_XMIT", | |
265 | "EV_DOUT_COMPLETE", | |
266 | "EV_DOUT_DEN", | |
267 | "EV_DOUT_RESETED", | |
268 | "EV_DOUT_STOPPED", | |
269 | "EV_DOUT_COLL", | |
270 | "EV_DOUT_UNDERRUN", | |
271 | }; | |
272 | ||
b9075fa9 | 273 | static __printf(2, 3) |
475be4d8 | 274 | void dout_debug(struct FsmInst *fi, char *fmt, ...) |
1da177e4 LT |
275 | { |
276 | va_list args; | |
277 | char buf[256]; | |
475be4d8 | 278 | |
1da177e4 | 279 | va_start(args, fmt); |
0b2dd130 | 280 | vsnprintf(buf, sizeof(buf), fmt, args); |
1da177e4 LT |
281 | DBG(0x2, "%s", buf); |
282 | va_end(args); | |
283 | } | |
284 | ||
285 | static void dout_stop_event(void *context) | |
286 | { | |
287 | struct st5481_adapter *adapter = context; | |
288 | ||
289 | FsmEvent(&adapter->d_out.fsm, EV_DOUT_STOPPED, NULL); | |
290 | } | |
291 | ||
292 | /* | |
293 | * Start the transfer of a D channel frame. | |
294 | */ | |
295 | static void usb_d_out(struct st5481_adapter *adapter, int buf_nr) | |
296 | { | |
297 | struct st5481_d_out *d_out = &adapter->d_out; | |
298 | struct urb *urb; | |
299 | unsigned int num_packets, packet_offset; | |
300 | int len, buf_size, bytes_sent; | |
301 | struct sk_buff *skb; | |
302 | struct usb_iso_packet_descriptor *desc; | |
303 | ||
304 | if (d_out->fsm.state != ST_DOUT_NORMAL) | |
305 | return; | |
306 | ||
307 | if (test_and_set_bit(buf_nr, &d_out->busy)) { | |
308 | DBG(2, "ep %d urb %d busy %#lx", EP_D_OUT, buf_nr, d_out->busy); | |
309 | return; | |
310 | } | |
311 | urb = d_out->urb[buf_nr]; | |
312 | ||
313 | skb = d_out->tx_skb; | |
314 | ||
315 | buf_size = NUM_ISO_PACKETS_D * SIZE_ISO_PACKETS_D_OUT; | |
475be4d8 | 316 | |
1da177e4 LT |
317 | if (skb) { |
318 | len = isdnhdlc_encode(&d_out->hdlc_state, | |
319 | skb->data, skb->len, &bytes_sent, | |
320 | urb->transfer_buffer, buf_size); | |
475be4d8 | 321 | skb_pull(skb, bytes_sent); |
1da177e4 LT |
322 | } else { |
323 | // Send flags or idle | |
324 | len = isdnhdlc_encode(&d_out->hdlc_state, | |
325 | NULL, 0, &bytes_sent, | |
326 | urb->transfer_buffer, buf_size); | |
327 | } | |
475be4d8 | 328 | |
1da177e4 LT |
329 | if (len < buf_size) { |
330 | FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_UNDERRUN); | |
331 | } | |
332 | if (skb && !skb->len) { | |
333 | d_out->tx_skb = NULL; | |
334 | D_L1L2(adapter, PH_DATA | CONFIRM, NULL); | |
335 | dev_kfree_skb_any(skb); | |
336 | } | |
337 | ||
338 | // Prepare the URB | |
339 | urb->transfer_buffer_length = len; | |
340 | num_packets = 0; | |
341 | packet_offset = 0; | |
342 | while (packet_offset < len) { | |
343 | desc = &urb->iso_frame_desc[num_packets]; | |
344 | desc->offset = packet_offset; | |
345 | desc->length = SIZE_ISO_PACKETS_D_OUT; | |
346 | if (len - packet_offset < desc->length) | |
347 | desc->length = len - packet_offset; | |
348 | num_packets++; | |
349 | packet_offset += desc->length; | |
350 | } | |
351 | urb->number_of_packets = num_packets; | |
352 | ||
353 | // Prepare the URB | |
354 | urb->dev = adapter->usb_dev; | |
355 | // Need to transmit the next buffer 2ms after the DEN_EVENT | |
356 | urb->transfer_flags = 0; | |
475be4d8 | 357 | urb->start_frame = usb_get_current_frame_number(adapter->usb_dev) + 2; |
1da177e4 | 358 | |
475be4d8 | 359 | DBG_ISO_PACKET(0x20, urb); |
1da177e4 LT |
360 | |
361 | if (usb_submit_urb(urb, GFP_KERNEL) < 0) { | |
362 | // There is another URB queued up | |
363 | urb->transfer_flags = URB_ISO_ASAP; | |
364 | SUBMIT_URB(urb, GFP_KERNEL); | |
475be4d8 | 365 | } |
1da177e4 LT |
366 | } |
367 | ||
368 | static void fifo_reseted(void *context) | |
369 | { | |
370 | struct st5481_adapter *adapter = context; | |
371 | ||
372 | FsmEvent(&adapter->d_out.fsm, EV_DOUT_RESETED, NULL); | |
373 | } | |
374 | ||
7d12e780 | 375 | static void usb_d_out_complete(struct urb *urb) |
1da177e4 LT |
376 | { |
377 | struct st5481_adapter *adapter = urb->context; | |
378 | struct st5481_d_out *d_out = &adapter->d_out; | |
17a4506d | 379 | long buf_nr; |
475be4d8 | 380 | |
1da177e4 LT |
381 | DBG(2, ""); |
382 | ||
383 | buf_nr = get_buf_nr(d_out->urb, urb); | |
384 | test_and_clear_bit(buf_nr, &d_out->busy); | |
385 | ||
386 | if (unlikely(urb->status < 0)) { | |
61ffcafa | 387 | switch (urb->status) { |
475be4d8 JP |
388 | case -ENOENT: |
389 | case -ESHUTDOWN: | |
390 | case -ECONNRESET: | |
391 | DBG(1, "urb killed status %d", urb->status); | |
392 | break; | |
393 | default: | |
394 | WARNING("urb status %d", urb->status); | |
395 | if (d_out->busy == 0) { | |
396 | st5481_usb_pipe_reset(adapter, EP_D_OUT | USB_DIR_OUT, fifo_reseted, adapter); | |
397 | } | |
398 | break; | |
1da177e4 | 399 | } |
61ffcafa | 400 | return; // Give up |
1da177e4 LT |
401 | } |
402 | ||
403 | FsmEvent(&adapter->d_out.fsm, EV_DOUT_COMPLETE, (void *) buf_nr); | |
404 | } | |
405 | ||
406 | /* ====================================================================== */ | |
407 | ||
408 | static void dout_start_xmit(struct FsmInst *fsm, int event, void *arg) | |
409 | { | |
410 | // FIXME unify? | |
411 | struct st5481_adapter *adapter = fsm->userdata; | |
412 | struct st5481_d_out *d_out = &adapter->d_out; | |
413 | struct urb *urb; | |
414 | int len, bytes_sent; | |
415 | struct sk_buff *skb; | |
416 | int buf_nr = 0; | |
417 | ||
418 | skb = d_out->tx_skb; | |
419 | ||
475be4d8 | 420 | DBG(2, "len=%d", skb->len); |
1da177e4 | 421 | |
c38fc3bc | 422 | isdnhdlc_out_init(&d_out->hdlc_state, HDLC_DCHANNEL | HDLC_BITREVERSE); |
1da177e4 LT |
423 | |
424 | if (test_and_set_bit(buf_nr, &d_out->busy)) { | |
b6c63937 | 425 | WARNING("ep %d urb %d busy %#lx", EP_D_OUT, buf_nr, d_out->busy); |
1da177e4 LT |
426 | return; |
427 | } | |
428 | urb = d_out->urb[buf_nr]; | |
429 | ||
430 | DBG_SKB(0x10, skb); | |
431 | len = isdnhdlc_encode(&d_out->hdlc_state, | |
432 | skb->data, skb->len, &bytes_sent, | |
433 | urb->transfer_buffer, 16); | |
434 | skb_pull(skb, bytes_sent); | |
435 | ||
475be4d8 | 436 | if (len < 16) |
1da177e4 LT |
437 | FsmChangeState(&d_out->fsm, ST_DOUT_SHORT_INIT); |
438 | else | |
439 | FsmChangeState(&d_out->fsm, ST_DOUT_LONG_INIT); | |
440 | ||
441 | if (skb->len == 0) { | |
442 | d_out->tx_skb = NULL; | |
443 | D_L1L2(adapter, PH_DATA | CONFIRM, NULL); | |
444 | dev_kfree_skb_any(skb); | |
445 | } | |
446 | ||
447 | // Prepare the URB | |
448 | urb->transfer_buffer_length = len; | |
449 | ||
450 | urb->iso_frame_desc[0].offset = 0; | |
451 | urb->iso_frame_desc[0].length = len; | |
452 | urb->number_of_packets = 1; | |
453 | ||
454 | // Prepare the URB | |
455 | urb->dev = adapter->usb_dev; | |
456 | urb->transfer_flags = URB_ISO_ASAP; | |
457 | ||
475be4d8 | 458 | DBG_ISO_PACKET(0x20, urb); |
1da177e4 LT |
459 | SUBMIT_URB(urb, GFP_KERNEL); |
460 | } | |
461 | ||
462 | static void dout_short_fifo(struct FsmInst *fsm, int event, void *arg) | |
463 | { | |
464 | struct st5481_adapter *adapter = fsm->userdata; | |
465 | struct st5481_d_out *d_out = &adapter->d_out; | |
466 | ||
467 | FsmChangeState(&d_out->fsm, ST_DOUT_SHORT_WAIT_DEN); | |
468 | st5481_usb_device_ctrl_msg(adapter, OUT_D_COUNTER, 16, NULL, NULL); | |
469 | } | |
470 | ||
471 | static void dout_end_short_frame(struct FsmInst *fsm, int event, void *arg) | |
472 | { | |
473 | struct st5481_adapter *adapter = fsm->userdata; | |
474 | struct st5481_d_out *d_out = &adapter->d_out; | |
475 | ||
476 | FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_UNDERRUN); | |
477 | } | |
478 | ||
479 | static void dout_long_enable_fifo(struct FsmInst *fsm, int event, void *arg) | |
480 | { | |
481 | struct st5481_adapter *adapter = fsm->userdata; | |
482 | struct st5481_d_out *d_out = &adapter->d_out; | |
475be4d8 | 483 | |
1da177e4 LT |
484 | st5481_usb_device_ctrl_msg(adapter, OUT_D_COUNTER, 16, NULL, NULL); |
485 | FsmChangeState(&d_out->fsm, ST_DOUT_LONG_WAIT_DEN); | |
486 | } | |
487 | ||
488 | static void dout_long_den(struct FsmInst *fsm, int event, void *arg) | |
489 | { | |
490 | struct st5481_adapter *adapter = fsm->userdata; | |
491 | struct st5481_d_out *d_out = &adapter->d_out; | |
492 | ||
493 | FsmChangeState(&d_out->fsm, ST_DOUT_NORMAL); | |
494 | usb_d_out(adapter, 0); | |
495 | usb_d_out(adapter, 1); | |
496 | } | |
497 | ||
498 | static void dout_reset(struct FsmInst *fsm, int event, void *arg) | |
499 | { | |
500 | struct st5481_adapter *adapter = fsm->userdata; | |
501 | struct st5481_d_out *d_out = &adapter->d_out; | |
502 | ||
503 | FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_RESET); | |
504 | st5481_usb_pipe_reset(adapter, EP_D_OUT | USB_DIR_OUT, fifo_reseted, adapter); | |
505 | } | |
506 | ||
507 | static void dout_stop(struct FsmInst *fsm, int event, void *arg) | |
508 | { | |
509 | struct st5481_adapter *adapter = fsm->userdata; | |
510 | struct st5481_d_out *d_out = &adapter->d_out; | |
511 | ||
512 | FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_STOP); | |
513 | st5481_usb_device_ctrl_msg(adapter, OUT_D_COUNTER, 0, dout_stop_event, adapter); | |
514 | } | |
515 | ||
516 | static void dout_underrun(struct FsmInst *fsm, int event, void *arg) | |
517 | { | |
518 | struct st5481_adapter *adapter = fsm->userdata; | |
519 | struct st5481_d_out *d_out = &adapter->d_out; | |
520 | ||
521 | if (test_bit(0, &d_out->busy) || test_bit(1, &d_out->busy)) { | |
522 | FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_NOT_BUSY); | |
523 | } else { | |
524 | dout_stop(fsm, event, arg); | |
525 | } | |
526 | } | |
527 | ||
528 | static void dout_check_busy(struct FsmInst *fsm, int event, void *arg) | |
529 | { | |
530 | struct st5481_adapter *adapter = fsm->userdata; | |
531 | struct st5481_d_out *d_out = &adapter->d_out; | |
532 | ||
533 | if (!test_bit(0, &d_out->busy) && !test_bit(1, &d_out->busy)) | |
534 | dout_stop(fsm, event, arg); | |
535 | } | |
536 | ||
537 | static void dout_reseted(struct FsmInst *fsm, int event, void *arg) | |
538 | { | |
539 | struct st5481_adapter *adapter = fsm->userdata; | |
540 | struct st5481_d_out *d_out = &adapter->d_out; | |
541 | ||
542 | FsmChangeState(&d_out->fsm, ST_DOUT_NONE); | |
543 | // FIXME locking | |
544 | if (d_out->tx_skb) | |
545 | FsmEvent(&d_out->fsm, EV_DOUT_START_XMIT, NULL); | |
546 | } | |
547 | ||
548 | static void dout_complete(struct FsmInst *fsm, int event, void *arg) | |
549 | { | |
550 | struct st5481_adapter *adapter = fsm->userdata; | |
17a4506d | 551 | long buf_nr = (long) arg; |
1da177e4 LT |
552 | |
553 | usb_d_out(adapter, buf_nr); | |
554 | } | |
555 | ||
556 | static void dout_ignore(struct FsmInst *fsm, int event, void *arg) | |
557 | { | |
558 | } | |
559 | ||
560 | static struct FsmNode DoutFnList[] __initdata = | |
561 | { | |
562 | {ST_DOUT_NONE, EV_DOUT_START_XMIT, dout_start_xmit}, | |
563 | ||
564 | {ST_DOUT_SHORT_INIT, EV_DOUT_COMPLETE, dout_short_fifo}, | |
565 | ||
566 | {ST_DOUT_SHORT_WAIT_DEN, EV_DOUT_DEN, dout_end_short_frame}, | |
567 | {ST_DOUT_SHORT_WAIT_DEN, EV_DOUT_UNDERRUN, dout_underrun}, | |
568 | ||
569 | {ST_DOUT_LONG_INIT, EV_DOUT_COMPLETE, dout_long_enable_fifo}, | |
570 | ||
571 | {ST_DOUT_LONG_WAIT_DEN, EV_DOUT_DEN, dout_long_den}, | |
572 | {ST_DOUT_LONG_WAIT_DEN, EV_DOUT_UNDERRUN, dout_underrun}, | |
573 | ||
574 | {ST_DOUT_NORMAL, EV_DOUT_UNDERRUN, dout_underrun}, | |
575 | {ST_DOUT_NORMAL, EV_DOUT_COMPLETE, dout_complete}, | |
576 | ||
577 | {ST_DOUT_WAIT_FOR_UNDERRUN, EV_DOUT_UNDERRUN, dout_underrun}, | |
578 | {ST_DOUT_WAIT_FOR_UNDERRUN, EV_DOUT_COMPLETE, dout_ignore}, | |
579 | ||
580 | {ST_DOUT_WAIT_FOR_NOT_BUSY, EV_DOUT_COMPLETE, dout_check_busy}, | |
581 | ||
582 | {ST_DOUT_WAIT_FOR_STOP, EV_DOUT_STOPPED, dout_reset}, | |
583 | ||
584 | {ST_DOUT_WAIT_FOR_RESET, EV_DOUT_RESETED, dout_reseted}, | |
585 | }; | |
586 | ||
587 | void st5481_d_l2l1(struct hisax_if *hisax_d_if, int pr, void *arg) | |
588 | { | |
589 | struct st5481_adapter *adapter = hisax_d_if->priv; | |
590 | struct sk_buff *skb = arg; | |
591 | ||
592 | switch (pr) { | |
593 | case PH_ACTIVATE | REQUEST: | |
594 | FsmEvent(&adapter->l1m, EV_PH_ACTIVATE_REQ, NULL); | |
595 | break; | |
596 | case PH_DEACTIVATE | REQUEST: | |
597 | FsmEvent(&adapter->l1m, EV_PH_DEACTIVATE_REQ, NULL); | |
598 | break; | |
599 | case PH_DATA | REQUEST: | |
600 | DBG(2, "PH_DATA REQUEST len %d", skb->len); | |
6dd44a74 | 601 | BUG_ON(adapter->d_out.tx_skb); |
1da177e4 LT |
602 | adapter->d_out.tx_skb = skb; |
603 | FsmEvent(&adapter->d_out.fsm, EV_DOUT_START_XMIT, NULL); | |
604 | break; | |
605 | default: | |
b6c63937 | 606 | WARNING("pr %#x\n", pr); |
1da177e4 LT |
607 | break; |
608 | } | |
609 | } | |
610 | ||
611 | /* ====================================================================== | |
612 | */ | |
613 | ||
614 | /* | |
615 | * Start receiving on the D channel since entered state F7. | |
616 | */ | |
617 | static void ph_connect(struct st5481_adapter *adapter) | |
618 | { | |
619 | struct st5481_d_out *d_out = &adapter->d_out; | |
620 | struct st5481_in *d_in = &adapter->d_in; | |
621 | ||
475be4d8 JP |
622 | DBG(8, ""); |
623 | ||
1da177e4 LT |
624 | FsmChangeState(&d_out->fsm, ST_DOUT_NONE); |
625 | ||
626 | // st5481_usb_device_ctrl_msg(adapter, FFMSK_D, OUT_UNDERRUN, NULL, NULL); | |
627 | st5481_usb_device_ctrl_msg(adapter, FFMSK_D, 0xfc, NULL, NULL); | |
628 | st5481_in_mode(d_in, L1_MODE_HDLC); | |
629 | ||
630 | #ifdef LOOPBACK | |
631 | // Turn loopback on (data sent on B and D looped back) | |
632 | st5481_usb_device_ctrl_msg(cs, LBB, 0x04, NULL, NULL); | |
633 | #endif | |
634 | ||
635 | st5481_usb_pipe_reset(adapter, EP_D_OUT | USB_DIR_OUT, NULL, NULL); | |
636 | ||
637 | // Turn on the green LED to tell that we are in state F7 | |
638 | adapter->leds |= GREEN_LED; | |
639 | st5481_usb_device_ctrl_msg(adapter, GPIO_OUT, adapter->leds, NULL, NULL); | |
640 | } | |
641 | ||
642 | /* | |
643 | * Stop receiving on the D channel since not in state F7. | |
644 | */ | |
645 | static void ph_disconnect(struct st5481_adapter *adapter) | |
646 | { | |
475be4d8 | 647 | DBG(8, ""); |
1da177e4 LT |
648 | |
649 | st5481_in_mode(&adapter->d_in, L1_MODE_NULL); | |
650 | ||
651 | // Turn off the green LED to tell that we left state F7 | |
652 | adapter->leds &= ~GREEN_LED; | |
653 | st5481_usb_device_ctrl_msg(adapter, GPIO_OUT, adapter->leds, NULL, NULL); | |
654 | } | |
655 | ||
656 | static int st5481_setup_d_out(struct st5481_adapter *adapter) | |
657 | { | |
658 | struct usb_device *dev = adapter->usb_dev; | |
659 | struct usb_interface *intf; | |
660 | struct usb_host_interface *altsetting = NULL; | |
661 | struct usb_host_endpoint *endpoint; | |
662 | struct st5481_d_out *d_out = &adapter->d_out; | |
663 | ||
475be4d8 | 664 | DBG(2, ""); |
1da177e4 LT |
665 | |
666 | intf = usb_ifnum_to_if(dev, 0); | |
667 | if (intf) | |
668 | altsetting = usb_altnum_to_altsetting(intf, 3); | |
669 | if (!altsetting) | |
670 | return -ENXIO; | |
671 | ||
672 | // Allocate URBs and buffers for the D channel out | |
673 | endpoint = &altsetting->endpoint[EP_D_OUT-1]; | |
674 | ||
475be4d8 | 675 | DBG(2, "endpoint address=%02x,packet size=%d", |
1da177e4 LT |
676 | endpoint->desc.bEndpointAddress, le16_to_cpu(endpoint->desc.wMaxPacketSize)); |
677 | ||
475be4d8 | 678 | return st5481_setup_isocpipes(d_out->urb, dev, |
1da177e4 LT |
679 | usb_sndisocpipe(dev, endpoint->desc.bEndpointAddress), |
680 | NUM_ISO_PACKETS_D, SIZE_ISO_PACKETS_D_OUT, | |
681 | NUM_ISO_PACKETS_D * SIZE_ISO_PACKETS_D_OUT, | |
682 | usb_d_out_complete, adapter); | |
683 | } | |
684 | ||
685 | static void st5481_release_d_out(struct st5481_adapter *adapter) | |
686 | { | |
687 | struct st5481_d_out *d_out = &adapter->d_out; | |
688 | ||
475be4d8 | 689 | DBG(2, ""); |
1da177e4 LT |
690 | |
691 | st5481_release_isocpipes(d_out->urb); | |
692 | } | |
693 | ||
694 | int st5481_setup_d(struct st5481_adapter *adapter) | |
695 | { | |
696 | int retval; | |
697 | ||
475be4d8 | 698 | DBG(2, ""); |
1da177e4 LT |
699 | |
700 | retval = st5481_setup_d_out(adapter); | |
701 | if (retval) | |
702 | goto err; | |
703 | adapter->d_in.bufsize = MAX_DFRAME_LEN_L1; | |
704 | adapter->d_in.num_packets = NUM_ISO_PACKETS_D; | |
705 | adapter->d_in.packet_size = SIZE_ISO_PACKETS_D_IN; | |
706 | adapter->d_in.ep = EP_D_IN | USB_DIR_IN; | |
707 | adapter->d_in.counter = IN_D_COUNTER; | |
708 | adapter->d_in.adapter = adapter; | |
709 | adapter->d_in.hisax_if = &adapter->hisax_d_if.ifc; | |
710 | retval = st5481_setup_in(&adapter->d_in); | |
711 | if (retval) | |
712 | goto err_d_out; | |
713 | ||
714 | adapter->l1m.fsm = &l1fsm; | |
715 | adapter->l1m.state = ST_L1_F3; | |
61ffcafa | 716 | adapter->l1m.debug = st5481_debug & 0x100; |
1da177e4 LT |
717 | adapter->l1m.userdata = adapter; |
718 | adapter->l1m.printdebug = l1m_debug; | |
719 | FsmInitTimer(&adapter->l1m, &adapter->timer); | |
720 | ||
721 | adapter->d_out.fsm.fsm = &dout_fsm; | |
722 | adapter->d_out.fsm.state = ST_DOUT_NONE; | |
61ffcafa | 723 | adapter->d_out.fsm.debug = st5481_debug & 0x100; |
1da177e4 LT |
724 | adapter->d_out.fsm.userdata = adapter; |
725 | adapter->d_out.fsm.printdebug = dout_debug; | |
726 | ||
727 | return 0; | |
728 | ||
475be4d8 | 729 | err_d_out: |
1da177e4 | 730 | st5481_release_d_out(adapter); |
475be4d8 | 731 | err: |
1da177e4 LT |
732 | return retval; |
733 | } | |
734 | ||
735 | void st5481_release_d(struct st5481_adapter *adapter) | |
736 | { | |
475be4d8 | 737 | DBG(2, ""); |
1da177e4 LT |
738 | |
739 | st5481_release_in(&adapter->d_in); | |
740 | st5481_release_d_out(adapter); | |
741 | } | |
742 | ||
743 | /* ====================================================================== | |
744 | * init / exit | |
745 | */ | |
746 | ||
747 | int __init st5481_d_init(void) | |
748 | { | |
749 | int retval; | |
750 | ||
751 | l1fsm.state_count = L1_STATE_COUNT; | |
752 | l1fsm.event_count = L1_EVENT_COUNT; | |
753 | l1fsm.strEvent = strL1Event; | |
754 | l1fsm.strState = strL1State; | |
755 | retval = FsmNew(&l1fsm, L1FnList, ARRAY_SIZE(L1FnList)); | |
756 | if (retval) | |
757 | goto err; | |
758 | ||
759 | dout_fsm.state_count = DOUT_STATE_COUNT; | |
760 | dout_fsm.event_count = DOUT_EVENT_COUNT; | |
761 | dout_fsm.strEvent = strDoutEvent; | |
762 | dout_fsm.strState = strDoutState; | |
763 | retval = FsmNew(&dout_fsm, DoutFnList, ARRAY_SIZE(DoutFnList)); | |
764 | if (retval) | |
765 | goto err_l1; | |
766 | ||
767 | return 0; | |
768 | ||
475be4d8 | 769 | err_l1: |
1da177e4 | 770 | FsmFree(&l1fsm); |
475be4d8 | 771 | err: |
1da177e4 LT |
772 | return retval; |
773 | } | |
774 | ||
775 | // can't be __exit | |
776 | void st5481_d_exit(void) | |
777 | { | |
778 | FsmFree(&l1fsm); | |
779 | FsmFree(&dout_fsm); | |
780 | } |