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[linux-block.git] / drivers / isdn / hardware / mISDN / hfcsusb.c
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de6cc651 1// SPDX-License-Identifier: GPL-2.0-or-later
69f52adb
KK		 2/* hfcsusb.c
3 * mISDN driver for Colognechip HFC-S USB chip
4 *
5 * Copyright 2001 by Peter Sprenger (sprenger@moving-bytes.de)
6 * Copyright 2008 by Martin Bachem (info@bachem-it.com)
7 *
69f52adb
KK		 8 * module params
9 * debug=<n>, default=0, with n=0xHHHHGGGG
10 * H - l1 driver flags described in hfcsusb.h
11 * G - common mISDN debug flags described at mISDNhw.h
12 *
13 * poll=<n>, default 128
14 * n : burst size of PH_DATA_IND at transparent rx data
15 *
670d6089 16 * Revision: 0.3.3 (socket), 2008-11-05
69f52adb
KK		 17 */
18
19#include <linux/module.h>
20#include <linux/delay.h>
21#include <linux/usb.h>
22#include <linux/mISDNhw.h>
5a0e3ad6 23#include <linux/slab.h>
69f52adb
KK		 24#include "hfcsusb.h"
25
69f52adb
KK		 26static unsigned int debug;
27static int poll = DEFAULT_TRANSP_BURST_SZ;
28
29static LIST_HEAD(HFClist);
30static DEFINE_RWLOCK(HFClock);
31
32
33MODULE_AUTHOR("Martin Bachem");
34MODULE_LICENSE("GPL");
35module_param(debug, uint, S_IRUGO | S_IWUSR);
36module_param(poll, int, 0);
37
38static int hfcsusb_cnt;
39
40/* some function prototypes */
41static void hfcsusb_ph_command(struct hfcsusb *hw, u_char command);
42static void release_hw(struct hfcsusb *hw);
43static void reset_hfcsusb(struct hfcsusb *hw);
44static void setPortMode(struct hfcsusb *hw);
45static void hfcsusb_start_endpoint(struct hfcsusb *hw, int channel);
46static void hfcsusb_stop_endpoint(struct hfcsusb *hw, int channel);
47static int hfcsusb_setup_bch(struct bchannel *bch, int protocol);
48static void deactivate_bchannel(struct bchannel *bch);
5265db2c 49static int hfcsusb_ph_info(struct hfcsusb *hw);
69f52adb
KK		 50
51/* start next background transfer for control channel */
52static void
53ctrl_start_transfer(struct hfcsusb *hw)
54{
55 if (debug & DBG_HFC_CALL_TRACE)
56 printk(KERN_DEBUG "%s: %s\n", hw->name, __func__);
57
58 if (hw->ctrl_cnt) {
59 hw->ctrl_urb->pipe = hw->ctrl_out_pipe;
60 hw->ctrl_urb->setup_packet = (u_char *)&hw->ctrl_write;
61 hw->ctrl_urb->transfer_buffer = NULL;
62 hw->ctrl_urb->transfer_buffer_length = 0;
63 hw->ctrl_write.wIndex =
475be4d8 64 cpu_to_le16(hw->ctrl_buff[hw->ctrl_out_idx].hfcs_reg);
69f52adb 65 hw->ctrl_write.wValue =
475be4d8 66 cpu_to_le16(hw->ctrl_buff[hw->ctrl_out_idx].reg_val);
69f52adb
KK		 67
68 usb_submit_urb(hw->ctrl_urb, GFP_ATOMIC);
69 }
70}
71
72/*
73 * queue a control transfer request to write HFC-S USB
74 * chip register using CTRL resuest queue
75 */
76static int write_reg(struct hfcsusb *hw, __u8 reg, __u8 val)
77{
78 struct ctrl_buf *buf;
79
80 if (debug & DBG_HFC_CALL_TRACE)
81 printk(KERN_DEBUG "%s: %s reg(0x%02x) val(0x%02x)\n",
475be4d8 82 hw->name, __func__, reg, val);
69f52adb
KK		 83
84 spin_lock(&hw->ctrl_lock);
e72e9f38
JL		 85 if (hw->ctrl_cnt >= HFC_CTRL_BUFSIZE) {
86 spin_unlock(&hw->ctrl_lock);
69f52adb 87 return 1;
e72e9f38 88 }
69f52adb
KK		 89 buf = &hw->ctrl_buff[hw->ctrl_in_idx];
90 buf->hfcs_reg = reg;
91 buf->reg_val = val;
92 if (++hw->ctrl_in_idx >= HFC_CTRL_BUFSIZE)
93 hw->ctrl_in_idx = 0;
94 if (++hw->ctrl_cnt == 1)
95 ctrl_start_transfer(hw);
96 spin_unlock(&hw->ctrl_lock);
97
98 return 0;
99}
100
101/* control completion routine handling background control cmds */
102static void
103ctrl_complete(struct urb *urb)
104{
105 struct hfcsusb *hw = (struct hfcsusb *) urb->context;
69f52adb
KK		 106
107 if (debug & DBG_HFC_CALL_TRACE)
108 printk(KERN_DEBUG "%s: %s\n", hw->name, __func__);
109
110 urb->dev = hw->dev;
111 if (hw->ctrl_cnt) {
69f52adb
KK		 112 hw->ctrl_cnt--; /* decrement actual count */
113 if (++hw->ctrl_out_idx >= HFC_CTRL_BUFSIZE)
114 hw->ctrl_out_idx = 0; /* pointer wrap */
115
116 ctrl_start_transfer(hw); /* start next transfer */
117 }
118}
119
120/* handle LED bits */
121static void
122set_led_bit(struct hfcsusb *hw, signed short led_bits, int set_on)
123{
124 if (set_on) {
125 if (led_bits < 0)
126 hw->led_state &= ~abs(led_bits);
127 else
128 hw->led_state |= led_bits;
129 } else {
130 if (led_bits < 0)
131 hw->led_state |= abs(led_bits);
132 else
133 hw->led_state &= ~led_bits;
134 }
135}
136
137/* handle LED requests */
138static void
139handle_led(struct hfcsusb *hw, int event)
140{
141 struct hfcsusb_vdata *driver_info = (struct hfcsusb_vdata *)
142 hfcsusb_idtab[hw->vend_idx].driver_info;
143 __u8 tmpled;
144
145 if (driver_info->led_scheme == LED_OFF)
146 return;
147 tmpled = hw->led_state;
148
149 switch (event) {
150 case LED_POWER_ON:
151 set_led_bit(hw, driver_info->led_bits[0], 1);
152 set_led_bit(hw, driver_info->led_bits[1], 0);
153 set_led_bit(hw, driver_info->led_bits[2], 0);
154 set_led_bit(hw, driver_info->led_bits[3], 0);
155 break;
156 case LED_POWER_OFF:
157 set_led_bit(hw, driver_info->led_bits[0], 0);
158 set_led_bit(hw, driver_info->led_bits[1], 0);
159 set_led_bit(hw, driver_info->led_bits[2], 0);
160 set_led_bit(hw, driver_info->led_bits[3], 0);
161 break;
162 case LED_S0_ON:
163 set_led_bit(hw, driver_info->led_bits[1], 1);
164 break;
165 case LED_S0_OFF:
166 set_led_bit(hw, driver_info->led_bits[1], 0);
167 break;
168 case LED_B1_ON:
169 set_led_bit(hw, driver_info->led_bits[2], 1);
170 break;
171 case LED_B1_OFF:
172 set_led_bit(hw, driver_info->led_bits[2], 0);
173 break;
174 case LED_B2_ON:
175 set_led_bit(hw, driver_info->led_bits[3], 1);
176 break;
177 case LED_B2_OFF:
178 set_led_bit(hw, driver_info->led_bits[3], 0);
179 break;
180 }
181
182 if (hw->led_state != tmpled) {
183 if (debug & DBG_HFC_CALL_TRACE)
184 printk(KERN_DEBUG "%s: %s reg(0x%02x) val(x%02x)\n",
475be4d8
JP		 185 hw->name, __func__,
186 HFCUSB_P_DATA, hw->led_state);
69f52adb
KK		 187
188 write_reg(hw, HFCUSB_P_DATA, hw->led_state);
189 }
190}
191
192/*
193 * Layer2 -> Layer 1 Bchannel data
194 */
195static int
196hfcusb_l2l1B(struct mISDNchannel *ch, struct sk_buff *skb)
197{
198 struct bchannel *bch = container_of(ch, struct bchannel, ch);
199 struct hfcsusb *hw = bch->hw;
200 int ret = -EINVAL;
201 struct mISDNhead *hh = mISDN_HEAD_P(skb);
202 u_long flags;
203
204 if (debug & DBG_HFC_CALL_TRACE)
205 printk(KERN_DEBUG "%s: %s\n", hw->name, __func__);
206
207 switch (hh->prim) {
208 case PH_DATA_REQ:
209 spin_lock_irqsave(&hw->lock, flags);
210 ret = bchannel_senddata(bch, skb);
211 spin_unlock_irqrestore(&hw->lock, flags);
212 if (debug & DBG_HFC_CALL_TRACE)
213 printk(KERN_DEBUG "%s: %s PH_DATA_REQ ret(%i)\n",
475be4d8 214 hw->name, __func__, ret);
8bfddfbe 215 if (ret > 0)
69f52adb 216 ret = 0;
69f52adb
KK		 217 return ret;
218 case PH_ACTIVATE_REQ:
219 if (!test_and_set_bit(FLG_ACTIVE, &bch->Flags)) {
37952cfa 220 hfcsusb_start_endpoint(hw, bch->nr - 1);
69f52adb
KK		 221 ret = hfcsusb_setup_bch(bch, ch->protocol);
222 } else
223 ret = 0;
224 if (!ret)
225 _queue_data(ch, PH_ACTIVATE_IND, MISDN_ID_ANY,
475be4d8 226 0, NULL, GFP_KERNEL);
69f52adb
KK		 227 break;
228 case PH_DEACTIVATE_REQ:
229 deactivate_bchannel(bch);
230 _queue_data(ch, PH_DEACTIVATE_IND, MISDN_ID_ANY,
475be4d8 231 0, NULL, GFP_KERNEL);
69f52adb
KK		 232 ret = 0;
233 break;
234 }
235 if (!ret)
236 dev_kfree_skb(skb);
237 return ret;
238}
239
240/*
241 * send full D/B channel status information
242 * as MPH_INFORMATION_IND
243 */
5265db2c 244static int
69f52adb
KK		 245hfcsusb_ph_info(struct hfcsusb *hw)
246{
247 struct ph_info *phi;
248 struct dchannel *dch = &hw->dch;
249 int i;
250
8d008e64 251 phi = kzalloc(struct_size(phi, bch, dch->dev.nrbchan), GFP_ATOMIC);
5265db2c
PP		 252 if (!phi)
253 return -ENOMEM;
254
69f52adb
KK		 255 phi->dch.ch.protocol = hw->protocol;
256 phi->dch.ch.Flags = dch->Flags;
257 phi->dch.state = dch->state;
258 phi->dch.num_bch = dch->dev.nrbchan;
259 for (i = 0; i < dch->dev.nrbchan; i++) {
260 phi->bch[i].protocol = hw->bch[i].ch.protocol;
261 phi->bch[i].Flags = hw->bch[i].Flags;
262 }
263 _queue_data(&dch->dev.D, MPH_INFORMATION_IND, MISDN_ID_ANY,
9f66a455 264 struct_size(phi, bch, dch->dev.nrbchan), phi, GFP_ATOMIC);
84860c72 265 kfree(phi);
5265db2c
PP		 266
267 return 0;
69f52adb
KK		 268}
269
270/*
271 * Layer2 -> Layer 1 Dchannel data
272 */
273static int
274hfcusb_l2l1D(struct mISDNchannel *ch, struct sk_buff *skb)
275{
276 struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D);
277 struct dchannel *dch = container_of(dev, struct dchannel, dev);
278 struct mISDNhead *hh = mISDN_HEAD_P(skb);
279 struct hfcsusb *hw = dch->hw;
280 int ret = -EINVAL;
281 u_long flags;
282
283 switch (hh->prim) {
284 case PH_DATA_REQ:
285 if (debug & DBG_HFC_CALL_TRACE)
286 printk(KERN_DEBUG "%s: %s: PH_DATA_REQ\n",
475be4d8 287 hw->name, __func__);
69f52adb
KK		 288
289 spin_lock_irqsave(&hw->lock, flags);
290 ret = dchannel_senddata(dch, skb);
291 spin_unlock_irqrestore(&hw->lock, flags);
292 if (ret > 0) {
293 ret = 0;
294 queue_ch_frame(ch, PH_DATA_CNF, hh->id, NULL);
295 }
296 break;
297
298 case PH_ACTIVATE_REQ:
299 if (debug & DBG_HFC_CALL_TRACE)
300 printk(KERN_DEBUG "%s: %s: PH_ACTIVATE_REQ %s\n",
475be4d8
JP		 301 hw->name, __func__,
302 (hw->protocol == ISDN_P_NT_S0) ? "NT" : "TE");
69f52adb
KK		 303
304 if (hw->protocol == ISDN_P_NT_S0) {
305 ret = 0;
306 if (test_bit(FLG_ACTIVE, &dch->Flags)) {
307 _queue_data(&dch->dev.D,
475be4d8
JP		 308 PH_ACTIVATE_IND, MISDN_ID_ANY, 0,
309 NULL, GFP_ATOMIC);
69f52adb
KK		 310 } else {
311 hfcsusb_ph_command(hw,
475be4d8 312 HFC_L1_ACTIVATE_NT);
69f52adb 313 test_and_set_bit(FLG_L2_ACTIVATED,
475be4d8 314 &dch->Flags);
69f52adb
KK		 315 }
316 } else {
317 hfcsusb_ph_command(hw, HFC_L1_ACTIVATE_TE);
318 ret = l1_event(dch->l1, hh->prim);
319 }
320 break;
321
322 case PH_DEACTIVATE_REQ:
323 if (debug & DBG_HFC_CALL_TRACE)
324 printk(KERN_DEBUG "%s: %s: PH_DEACTIVATE_REQ\n",
475be4d8 325 hw->name, __func__);
69f52adb
KK		 326 test_and_clear_bit(FLG_L2_ACTIVATED, &dch->Flags);
327
328 if (hw->protocol == ISDN_P_NT_S0) {
329 hfcsusb_ph_command(hw, HFC_L1_DEACTIVATE_NT);
330 spin_lock_irqsave(&hw->lock, flags);
331 skb_queue_purge(&dch->squeue);
332 if (dch->tx_skb) {
333 dev_kfree_skb(dch->tx_skb);
334 dch->tx_skb = NULL;
335 }
336 dch->tx_idx = 0;
337 if (dch->rx_skb) {
338 dev_kfree_skb(dch->rx_skb);
339 dch->rx_skb = NULL;
340 }
341 test_and_clear_bit(FLG_TX_BUSY, &dch->Flags);
342 spin_unlock_irqrestore(&hw->lock, flags);
343#ifdef FIXME
344 if (test_and_clear_bit(FLG_L1_BUSY, &dch->Flags))
345 dchannel_sched_event(&hc->dch, D_CLEARBUSY);
346#endif
347 ret = 0;
348 } else
349 ret = l1_event(dch->l1, hh->prim);
350 break;
351 case MPH_INFORMATION_REQ:
5265db2c 352 ret = hfcsusb_ph_info(hw);
69f52adb
KK		 353 break;
354 }
355
356 return ret;
357}
358
359/*
360 * Layer 1 callback function
361 */
362static int
363hfc_l1callback(struct dchannel *dch, u_int cmd)
364{
365 struct hfcsusb *hw = dch->hw;
366
367 if (debug & DBG_HFC_CALL_TRACE)
368 printk(KERN_DEBUG "%s: %s cmd 0x%x\n",
475be4d8 369 hw->name, __func__, cmd);
69f52adb
KK		 370
371 switch (cmd) {
372 case INFO3_P8:
373 case INFO3_P10:
374 case HW_RESET_REQ:
375 case HW_POWERUP_REQ:
376 break;
377
378 case HW_DEACT_REQ:
379 skb_queue_purge(&dch->squeue);
380 if (dch->tx_skb) {
381 dev_kfree_skb(dch->tx_skb);
382 dch->tx_skb = NULL;
383 }
384 dch->tx_idx = 0;
385 if (dch->rx_skb) {
386 dev_kfree_skb(dch->rx_skb);
387 dch->rx_skb = NULL;
388 }
389 test_and_clear_bit(FLG_TX_BUSY, &dch->Flags);
390 break;
391 case PH_ACTIVATE_IND:
392 test_and_set_bit(FLG_ACTIVE, &dch->Flags);
393 _queue_data(&dch->dev.D, cmd, MISDN_ID_ANY, 0, NULL,
475be4d8 394 GFP_ATOMIC);
69f52adb
KK		 395 break;
396 case PH_DEACTIVATE_IND:
397 test_and_clear_bit(FLG_ACTIVE, &dch->Flags);
398 _queue_data(&dch->dev.D, cmd, MISDN_ID_ANY, 0, NULL,
475be4d8 399 GFP_ATOMIC);
69f52adb
KK		 400 break;
401 default:
402 if (dch->debug & DEBUG_HW)
403 printk(KERN_DEBUG "%s: %s: unknown cmd %x\n",
475be4d8 404 hw->name, __func__, cmd);
69f52adb
KK		 405 return -1;
406 }
5265db2c 407 return hfcsusb_ph_info(hw);
69f52adb
KK		 408}
409
410static int
411open_dchannel(struct hfcsusb *hw, struct mISDNchannel *ch,
475be4d8 412 struct channel_req *rq)
69f52adb
KK		 413{
414 int err = 0;
415
416 if (debug & DEBUG_HW_OPEN)
417 printk(KERN_DEBUG "%s: %s: dev(%d) open addr(%i) from %p\n",
475be4d8
JP		 418 hw->name, __func__, hw->dch.dev.id, rq->adr.channel,
419 __builtin_return_address(0));
69f52adb
KK		 420 if (rq->protocol == ISDN_P_NONE)
421 return -EINVAL;
422
423 test_and_clear_bit(FLG_ACTIVE, &hw->dch.Flags);
424 test_and_clear_bit(FLG_ACTIVE, &hw->ech.Flags);
425 hfcsusb_start_endpoint(hw, HFC_CHAN_D);
426
427 /* E-Channel logging */
428 if (rq->adr.channel == 1) {
429 if (hw->fifos[HFCUSB_PCM_RX].pipe) {
430 hfcsusb_start_endpoint(hw, HFC_CHAN_E);
431 set_bit(FLG_ACTIVE, &hw->ech.Flags);
432 _queue_data(&hw->ech.dev.D, PH_ACTIVATE_IND,
475be4d8 433 MISDN_ID_ANY, 0, NULL, GFP_ATOMIC);
69f52adb
KK		 434 } else
435 return -EINVAL;
436 }
437
438 if (!hw->initdone) {
439 hw->protocol = rq->protocol;
440 if (rq->protocol == ISDN_P_TE_S0) {
441 err = create_l1(&hw->dch, hfc_l1callback);
442 if (err)
443 return err;
444 }
445 setPortMode(hw);
446 ch->protocol = rq->protocol;
447 hw->initdone = 1;
448 } else {
449 if (rq->protocol != ch->protocol)
450 return -EPROTONOSUPPORT;
451 }
452
453 if (((ch->protocol == ISDN_P_NT_S0) && (hw->dch.state == 3)) ||
454 ((ch->protocol == ISDN_P_TE_S0) && (hw->dch.state == 7)))
455 _queue_data(ch, PH_ACTIVATE_IND, MISDN_ID_ANY,
475be4d8 456 0, NULL, GFP_KERNEL);
69f52adb
KK		 457 rq->ch = ch;
458 if (!try_module_get(THIS_MODULE))
459 printk(KERN_WARNING "%s: %s: cannot get module\n",
475be4d8 460 hw->name, __func__);
69f52adb
KK		 461 return 0;
462}
463
464static int
465open_bchannel(struct hfcsusb *hw, struct channel_req *rq)
466{
467 struct bchannel *bch;
468
819a1008 469 if (rq->adr.channel == 0 || rq->adr.channel > 2)
69f52adb
KK		 470 return -EINVAL;
471 if (rq->protocol == ISDN_P_NONE)
472 return -EINVAL;
473
474 if (debug & DBG_HFC_CALL_TRACE)
475 printk(KERN_DEBUG "%s: %s B%i\n",
475be4d8 476 hw->name, __func__, rq->adr.channel);
69f52adb
KK		 477
478 bch = &hw->bch[rq->adr.channel - 1];
479 if (test_and_set_bit(FLG_OPEN, &bch->Flags))
480 return -EBUSY; /* b-channel can be only open once */
69f52adb
KK		 481 bch->ch.protocol = rq->protocol;
482 rq->ch = &bch->ch;
483
69f52adb
KK		 484 if (!try_module_get(THIS_MODULE))
485 printk(KERN_WARNING "%s: %s:cannot get module\n",
475be4d8 486 hw->name, __func__);
69f52adb
KK		 487 return 0;
488}
489
490static int
491channel_ctrl(struct hfcsusb *hw, struct mISDN_ctrl_req *cq)
492{
493 int ret = 0;
494
495 if (debug & DBG_HFC_CALL_TRACE)
496 printk(KERN_DEBUG "%s: %s op(0x%x) channel(0x%x)\n",
475be4d8 497 hw->name, __func__, (cq->op), (cq->channel));
69f52adb
KK		 498
499 switch (cq->op) {
500 case MISDN_CTRL_GETOP:
501 cq->op = MISDN_CTRL_LOOP | MISDN_CTRL_CONNECT |
475be4d8 502 MISDN_CTRL_DISCONNECT;
69f52adb
KK		 503 break;
504 default:
505 printk(KERN_WARNING "%s: %s: unknown Op %x\n",
475be4d8 506 hw->name, __func__, cq->op);
69f52adb
KK		 507 ret = -EINVAL;
508 break;
509 }
510 return ret;
511}
512
513/*
514 * device control function
515 */
516static int
517hfc_dctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
518{
519 struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D);
520 struct dchannel *dch = container_of(dev, struct dchannel, dev);
521 struct hfcsusb *hw = dch->hw;
522 struct channel_req *rq;
523 int err = 0;
524
525 if (dch->debug & DEBUG_HW)
526 printk(KERN_DEBUG "%s: %s: cmd:%x %p\n",
475be4d8 527 hw->name, __func__, cmd, arg);
69f52adb
KK		 528 switch (cmd) {
529 case OPEN_CHANNEL:
530 rq = arg;
531 if ((rq->protocol == ISDN_P_TE_S0) ||
532 (rq->protocol == ISDN_P_NT_S0))
533 err = open_dchannel(hw, ch, rq);
534 else
535 err = open_bchannel(hw, rq);
536 if (!err)
537 hw->open++;
538 break;
539 case CLOSE_CHANNEL:
540 hw->open--;
541 if (debug & DEBUG_HW_OPEN)
542 printk(KERN_DEBUG
475be4d8
JP		 543 "%s: %s: dev(%d) close from %p (open %d)\n",
544 hw->name, __func__, hw->dch.dev.id,
545 __builtin_return_address(0), hw->open);
69f52adb
KK		 546 if (!hw->open) {
547 hfcsusb_stop_endpoint(hw, HFC_CHAN_D);
548 if (hw->fifos[HFCUSB_PCM_RX].pipe)
549 hfcsusb_stop_endpoint(hw, HFC_CHAN_E);
550 handle_led(hw, LED_POWER_ON);
551 }
552 module_put(THIS_MODULE);
553 break;
554 case CONTROL_CHANNEL:
555 err = channel_ctrl(hw, arg);
556 break;
557 default:
558 if (dch->debug & DEBUG_HW)
559 printk(KERN_DEBUG "%s: %s: unknown command %x\n",
475be4d8 560 hw->name, __func__, cmd);
69f52adb
KK		 561 return -EINVAL;
562 }
563 return err;
564}
565
566/*
567 * S0 TE state change event handler
568 */
569static void
570ph_state_te(struct dchannel *dch)
571{
572 struct hfcsusb *hw = dch->hw;
573
574 if (debug & DEBUG_HW) {
575 if (dch->state <= HFC_MAX_TE_LAYER1_STATE)
576 printk(KERN_DEBUG "%s: %s: %s\n", hw->name, __func__,
475be4d8 577 HFC_TE_LAYER1_STATES[dch->state]);
69f52adb
KK		 578 else
579 printk(KERN_DEBUG "%s: %s: TE F%d\n",
475be4d8 580 hw->name, __func__, dch->state);
69f52adb
KK		 581 }
582
583 switch (dch->state) {
584 case 0:
585 l1_event(dch->l1, HW_RESET_IND);
586 break;
587 case 3:
588 l1_event(dch->l1, HW_DEACT_IND);
589 break;
590 case 5:
591 case 8:
592 l1_event(dch->l1, ANYSIGNAL);
593 break;
594 case 6:
595 l1_event(dch->l1, INFO2);
596 break;
597 case 7:
598 l1_event(dch->l1, INFO4_P8);
599 break;
600 }
601 if (dch->state == 7)
602 handle_led(hw, LED_S0_ON);
603 else
604 handle_led(hw, LED_S0_OFF);
605}
606
607/*
608 * S0 NT state change event handler
609 */
610static void
611ph_state_nt(struct dchannel *dch)
612{
613 struct hfcsusb *hw = dch->hw;
614
615 if (debug & DEBUG_HW) {
616 if (dch->state <= HFC_MAX_NT_LAYER1_STATE)
617 printk(KERN_DEBUG "%s: %s: %s\n",
475be4d8
JP		 618 hw->name, __func__,
619 HFC_NT_LAYER1_STATES[dch->state]);
69f52adb
KK		 620
621 else
622 printk(KERN_INFO DRIVER_NAME "%s: %s: NT G%d\n",
475be4d8 623 hw->name, __func__, dch->state);
69f52adb
KK		 624 }
625
626 switch (dch->state) {
627 case (1):
628 test_and_clear_bit(FLG_ACTIVE, &dch->Flags);
629 test_and_clear_bit(FLG_L2_ACTIVATED, &dch->Flags);
630 hw->nt_timer = 0;
631 hw->timers &= ~NT_ACTIVATION_TIMER;
632 handle_led(hw, LED_S0_OFF);
633 break;
634
635 case (2):
636 if (hw->nt_timer < 0) {
637 hw->nt_timer = 0;
638 hw->timers &= ~NT_ACTIVATION_TIMER;
639 hfcsusb_ph_command(dch->hw, HFC_L1_DEACTIVATE_NT);
640 } else {
641 hw->timers |= NT_ACTIVATION_TIMER;
642 hw->nt_timer = NT_T1_COUNT;
643 /* allow G2 -> G3 transition */
644 write_reg(hw, HFCUSB_STATES, 2 | HFCUSB_NT_G2_G3);
645 }
646 break;
647 case (3):
648 hw->nt_timer = 0;
649 hw->timers &= ~NT_ACTIVATION_TIMER;
650 test_and_set_bit(FLG_ACTIVE, &dch->Flags);
651 _queue_data(&dch->dev.D, PH_ACTIVATE_IND,
475be4d8 652 MISDN_ID_ANY, 0, NULL, GFP_ATOMIC);
69f52adb
KK		 653 handle_led(hw, LED_S0_ON);
654 break;
655 case (4):
656 hw->nt_timer = 0;
657 hw->timers &= ~NT_ACTIVATION_TIMER;
658 break;
659 default:
660 break;
661 }
662 hfcsusb_ph_info(hw);
663}
664
665static void
666ph_state(struct dchannel *dch)
667{
668 struct hfcsusb *hw = dch->hw;
669
670 if (hw->protocol == ISDN_P_NT_S0)
671 ph_state_nt(dch);
672 else if (hw->protocol == ISDN_P_TE_S0)
673 ph_state_te(dch);
674}
675
676/*
677 * disable/enable BChannel for desired protocoll
678 */
679static int
680hfcsusb_setup_bch(struct bchannel *bch, int protocol)
681{
682 struct hfcsusb *hw = bch->hw;
683 __u8 conhdlc, sctrl, sctrl_r;
684
685 if (debug & DEBUG_HW)
686 printk(KERN_DEBUG "%s: %s: protocol %x-->%x B%d\n",
475be4d8
JP		 687 hw->name, __func__, bch->state, protocol,
688 bch->nr);
69f52adb
KK		 689
690 /* setup val for CON_HDLC */
691 conhdlc = 0;
692 if (protocol > ISDN_P_NONE)
693 conhdlc = 8; /* enable FIFO */
694
695 switch (protocol) {
696 case (-1): /* used for init */
697 bch->state = -1;
df561f66 698 fallthrough;
69f52adb
KK		 699 case (ISDN_P_NONE):
700 if (bch->state == ISDN_P_NONE)
701 return 0; /* already in idle state */
702 bch->state = ISDN_P_NONE;
703 clear_bit(FLG_HDLC, &bch->Flags);
704 clear_bit(FLG_TRANSPARENT, &bch->Flags);
705 break;
706 case (ISDN_P_B_RAW):
707 conhdlc |= 2;
708 bch->state = protocol;
709 set_bit(FLG_TRANSPARENT, &bch->Flags);
710 break;
711 case (ISDN_P_B_HDLC):
712 bch->state = protocol;
713 set_bit(FLG_HDLC, &bch->Flags);
714 break;
715 default:
716 if (debug & DEBUG_HW)
717 printk(KERN_DEBUG "%s: %s: prot not known %x\n",
475be4d8 718 hw->name, __func__, protocol);
69f52adb
KK		 719 return -ENOPROTOOPT;
720 }
721
722 if (protocol >= ISDN_P_NONE) {
723 write_reg(hw, HFCUSB_FIFO, (bch->nr == 1) ? 0 : 2);
724 write_reg(hw, HFCUSB_CON_HDLC, conhdlc);
725 write_reg(hw, HFCUSB_INC_RES_F, 2);
726 write_reg(hw, HFCUSB_FIFO, (bch->nr == 1) ? 1 : 3);
727 write_reg(hw, HFCUSB_CON_HDLC, conhdlc);
728 write_reg(hw, HFCUSB_INC_RES_F, 2);
729
730 sctrl = 0x40 + ((hw->protocol == ISDN_P_TE_S0) ? 0x00 : 0x04);
731 sctrl_r = 0x0;
732 if (test_bit(FLG_ACTIVE, &hw->bch[0].Flags)) {
733 sctrl |= 1;
734 sctrl_r |= 1;
735 }
736 if (test_bit(FLG_ACTIVE, &hw->bch[1].Flags)) {
737 sctrl |= 2;
738 sctrl_r |= 2;
739 }
740 write_reg(hw, HFCUSB_SCTRL, sctrl);
741 write_reg(hw, HFCUSB_SCTRL_R, sctrl_r);
742
743 if (protocol > ISDN_P_NONE)
744 handle_led(hw, (bch->nr == 1) ? LED_B1_ON : LED_B2_ON);
745 else
746 handle_led(hw, (bch->nr == 1) ? LED_B1_OFF :
475be4d8 747 LED_B2_OFF);
69f52adb 748 }
5265db2c 749 return hfcsusb_ph_info(hw);
69f52adb
KK		 750}
751
752static void
753hfcsusb_ph_command(struct hfcsusb *hw, u_char command)
754{
755 if (debug & DEBUG_HW)
756 printk(KERN_DEBUG "%s: %s: %x\n",
475be4d8 757 hw->name, __func__, command);
69f52adb
KK		 758
759 switch (command) {
760 case HFC_L1_ACTIVATE_TE:
761 /* force sending sending INFO1 */
762 write_reg(hw, HFCUSB_STATES, 0x14);
763 /* start l1 activation */
764 write_reg(hw, HFCUSB_STATES, 0x04);
765 break;
766
767 case HFC_L1_FORCE_DEACTIVATE_TE:
768 write_reg(hw, HFCUSB_STATES, 0x10);
769 write_reg(hw, HFCUSB_STATES, 0x03);
770 break;
771
772 case HFC_L1_ACTIVATE_NT:
773 if (hw->dch.state == 3)
774 _queue_data(&hw->dch.dev.D, PH_ACTIVATE_IND,
475be4d8 775 MISDN_ID_ANY, 0, NULL, GFP_ATOMIC);
69f52adb
KK		 776 else
777 write_reg(hw, HFCUSB_STATES, HFCUSB_ACTIVATE |
475be4d8 778 HFCUSB_DO_ACTION | HFCUSB_NT_G2_G3);
69f52adb
KK		 779 break;
780
781 case HFC_L1_DEACTIVATE_NT:
782 write_reg(hw, HFCUSB_STATES,
475be4d8 783 HFCUSB_DO_ACTION);
69f52adb
KK		 784 break;
785 }
786}
787
788/*
789 * Layer 1 B-channel hardware access
790 */
791static int
792channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
793{
6d1ee48f 794 return mISDN_ctrl_bchannel(bch, cq);
69f52adb
KK		 795}
796
797/* collect data from incoming interrupt or isochron USB data */
798static void
799hfcsusb_rx_frame(struct usb_fifo *fifo, __u8 *data, unsigned int len,
475be4d8 800 int finish)
69f52adb
KK		 801{
802 struct hfcsusb *hw = fifo->hw;
803 struct sk_buff *rx_skb = NULL;
804 int maxlen = 0;
805 int fifon = fifo->fifonum;
806 int i;
807 int hdlc = 0;
16630f54 808 unsigned long flags;
69f52adb
KK		 809
810 if (debug & DBG_HFC_CALL_TRACE)
811 printk(KERN_DEBUG "%s: %s: fifo(%i) len(%i) "
475be4d8
JP		 812 "dch(%p) bch(%p) ech(%p)\n",
813 hw->name, __func__, fifon, len,
814 fifo->dch, fifo->bch, fifo->ech);
69f52adb
KK		 815
816 if (!len)
817 return;
818
819 if ((!!fifo->dch + !!fifo->bch + !!fifo->ech) != 1) {
820 printk(KERN_DEBUG "%s: %s: undefined channel\n",
821 hw->name, __func__);
822 return;
823 }
824
16630f54 825 spin_lock_irqsave(&hw->lock, flags);
69f52adb
KK		 826 if (fifo->dch) {
827 rx_skb = fifo->dch->rx_skb;
828 maxlen = fifo->dch->maxlen;
829 hdlc = 1;
830 }
831 if (fifo->bch) {
c27b46e7
KK		 832 if (test_bit(FLG_RX_OFF, &fifo->bch->Flags)) {
833 fifo->bch->dropcnt += len;
16630f54 834 spin_unlock_irqrestore(&hw->lock, flags);
c27b46e7
KK		 835 return;
836 }
7206e659 837 maxlen = bchannel_get_rxbuf(fifo->bch, len);
69f52adb 838 rx_skb = fifo->bch->rx_skb;
7206e659
KK		 839 if (maxlen < 0) {
840 if (rx_skb)
841 skb_trim(rx_skb, 0);
257daba4
KW		 842 pr_warn("%s.B%d: No bufferspace for %d bytes\n",
843 hw->name, fifo->bch->nr, len);
16630f54 844 spin_unlock_irqrestore(&hw->lock, flags);
7206e659
KK		 845 return;
846 }
69f52adb
KK		 847 maxlen = fifo->bch->maxlen;
848 hdlc = test_bit(FLG_HDLC, &fifo->bch->Flags);
849 }
850 if (fifo->ech) {
851 rx_skb = fifo->ech->rx_skb;
852 maxlen = fifo->ech->maxlen;
853 hdlc = 1;
854 }
855
69f52adb 856 if (fifo->dch || fifo->ech) {
7206e659
KK		 857 if (!rx_skb) {
858 rx_skb = mI_alloc_skb(maxlen, GFP_ATOMIC);
859 if (rx_skb) {
860 if (fifo->dch)
861 fifo->dch->rx_skb = rx_skb;
862 if (fifo->ech)
863 fifo->ech->rx_skb = rx_skb;
864 skb_trim(rx_skb, 0);
865 } else {
866 printk(KERN_DEBUG "%s: %s: No mem for rx_skb\n",
867 hw->name, __func__);
16630f54 868 spin_unlock_irqrestore(&hw->lock, flags);
7206e659
KK		 869 return;
870 }
871 }
69f52adb
KK		 872 /* D/E-Channel SKB range check */
873 if ((rx_skb->len + len) >= MAX_DFRAME_LEN_L1) {
874 printk(KERN_DEBUG "%s: %s: sbk mem exceeded "
475be4d8
JP		 875 "for fifo(%d) HFCUSB_D_RX\n",
876 hw->name, __func__, fifon);
69f52adb 877 skb_trim(rx_skb, 0);
16630f54 878 spin_unlock_irqrestore(&hw->lock, flags);
69f52adb
KK		 879 return;
880 }
69f52adb
KK		 881 }
882
59ae1d12 883 skb_put_data(rx_skb, data, len);
69f52adb
KK		 884
885 if (hdlc) {
886 /* we have a complete hdlc packet */
887 if (finish) {
888 if ((rx_skb->len > 3) &&
475be4d8 889 (!(rx_skb->data[rx_skb->len - 1]))) {
69f52adb
KK		 890 if (debug & DBG_HFC_FIFO_VERBOSE) {
891 printk(KERN_DEBUG "%s: %s: fifon(%i)"
475be4d8
JP		 892 " new RX len(%i): ",
893 hw->name, __func__, fifon,
894 rx_skb->len);
69f52adb
KK		 895 i = 0;
896 while (i < rx_skb->len)
897 printk("%02x ",
475be4d8 898 rx_skb->data[i++]);
69f52adb
KK		 899 printk("\n");
900 }
901
902 /* remove CRC & status */
903 skb_trim(rx_skb, rx_skb->len - 3);
904
905 if (fifo->dch)
906 recv_Dchannel(fifo->dch);
907 if (fifo->bch)
034005a0
KK		 908 recv_Bchannel(fifo->bch, MISDN_ID_ANY,
909 0);
69f52adb
KK		 910 if (fifo->ech)
911 recv_Echannel(fifo->ech,
475be4d8 912 &hw->dch);
69f52adb
KK		 913 } else {
914 if (debug & DBG_HFC_FIFO_VERBOSE) {
915 printk(KERN_DEBUG
475be4d8
JP		 916 "%s: CRC or minlen ERROR fifon(%i) "
917 "RX len(%i): ",
918 hw->name, fifon, rx_skb->len);
69f52adb
KK		 919 i = 0;
920 while (i < rx_skb->len)
921 printk("%02x ",
475be4d8 922 rx_skb->data[i++]);
69f52adb
KK		 923 printk("\n");
924 }
925 skb_trim(rx_skb, 0);
926 }
927 }
928 } else {
929 /* deliver transparent data to layer2 */
034005a0 930 recv_Bchannel(fifo->bch, MISDN_ID_ANY, false);
69f52adb 931 }
16630f54 932 spin_unlock_irqrestore(&hw->lock, flags);
69f52adb
KK		 933}
934
6c2959aa 935static void
69f52adb
KK		 936fill_isoc_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe,
937 void *buf, int num_packets, int packet_size, int interval,
938 usb_complete_t complete, void *context)
939{
940 int k;
941
942 usb_fill_bulk_urb(urb, dev, pipe, buf, packet_size * num_packets,
475be4d8 943 complete, context);
69f52adb
KK		 944
945 urb->number_of_packets = num_packets;
946 urb->transfer_flags = URB_ISO_ASAP;
947 urb->actual_length = 0;
948 urb->interval = interval;
949
950 for (k = 0; k < num_packets; k++) {
951 urb->iso_frame_desc[k].offset = packet_size * k;
952 urb->iso_frame_desc[k].length = packet_size;
953 urb->iso_frame_desc[k].actual_length = 0;
954 }
955}
956
957/* receive completion routine for all ISO tx fifos */
958static void
959rx_iso_complete(struct urb *urb)
960{
961 struct iso_urb *context_iso_urb = (struct iso_urb *) urb->context;
962 struct usb_fifo *fifo = context_iso_urb->owner_fifo;
963 struct hfcsusb *hw = fifo->hw;
964 int k, len, errcode, offset, num_isoc_packets, fifon, maxlen,
475be4d8 965 status, iso_status, i;
69f52adb
KK		 966 __u8 *buf;
967 static __u8 eof[8];
968 __u8 s0_state;
16630f54 969 unsigned long flags;
69f52adb
KK		 970
971 fifon = fifo->fifonum;
972 status = urb->status;
973
16630f54 974 spin_lock_irqsave(&hw->lock, flags);
69f52adb
KK		 975 if (fifo->stop_gracefull) {
976 fifo->stop_gracefull = 0;
977 fifo->active = 0;
16630f54 978 spin_unlock_irqrestore(&hw->lock, flags);
69f52adb
KK		 979 return;
980 }
16630f54 981 spin_unlock_irqrestore(&hw->lock, flags);
69f52adb
KK		 982
983 /*
984 * ISO transfer only partially completed,
985 * look at individual frame status for details
986 */
987 if (status == -EXDEV) {
988 if (debug & DEBUG_HW)
989 printk(KERN_DEBUG "%s: %s: with -EXDEV "
475be4d8
JP		 990 "urb->status %d, fifonum %d\n",
991 hw->name, __func__, status, fifon);
69f52adb
KK		 992
993 /* clear status, so go on with ISO transfers */
994 status = 0;
995 }
996
997 s0_state = 0;
998 if (fifo->active && !status) {
999 num_isoc_packets = iso_packets[fifon];
1000 maxlen = fifo->usb_packet_maxlen;
1001
1002 for (k = 0; k < num_isoc_packets; ++k) {
1003 len = urb->iso_frame_desc[k].actual_length;
1004 offset = urb->iso_frame_desc[k].offset;
1005 buf = context_iso_urb->buffer + offset;
1006 iso_status = urb->iso_frame_desc[k].status;
1007
1008 if (iso_status && (debug & DBG_HFC_FIFO_VERBOSE)) {
1009 printk(KERN_DEBUG "%s: %s: "
475be4d8
JP		 1010 "ISO packet %i, status: %i\n",
1011 hw->name, __func__, k, iso_status);
69f52adb
KK		 1012 }
1013
1014 /* USB data log for every D ISO in */
1015 if ((fifon == HFCUSB_D_RX) &&
1016 (debug & DBG_HFC_USB_VERBOSE)) {
1017 printk(KERN_DEBUG
475be4d8
JP		 1018 "%s: %s: %d (%d/%d) len(%d) ",
1019 hw->name, __func__, urb->start_frame,
1020 k, num_isoc_packets - 1,
1021 len);
69f52adb
KK		 1022 for (i = 0; i < len; i++)
1023 printk("%x ", buf[i]);
1024 printk("\n");
1025 }
1026
1027 if (!iso_status) {
1028 if (fifo->last_urblen != maxlen) {
1029 /*
1030 * save fifo fill-level threshold bits
1031 * to use them later in TX ISO URB
1032 * completions
1033 */
1034 hw->threshold_mask = buf[1];
1035
1036 if (fifon == HFCUSB_D_RX)
1037 s0_state = (buf[0] >> 4);
1038
1039 eof[fifon] = buf[0] & 1;
1040 if (len > 2)
1041 hfcsusb_rx_frame(fifo, buf + 2,
475be4d8
JP		 1042 len - 2, (len < maxlen)
1043 ? eof[fifon] : 0);
69f52adb
KK		 1044 } else
1045 hfcsusb_rx_frame(fifo, buf, len,
475be4d8
JP		 1046 (len < maxlen) ?
1047 eof[fifon] : 0);
69f52adb
KK		 1048 fifo->last_urblen = len;
1049 }
1050 }
1051
1052 /* signal S0 layer1 state change */
1053 if ((s0_state) && (hw->initdone) &&
1054 (s0_state != hw->dch.state)) {
1055 hw->dch.state = s0_state;
1056 schedule_event(&hw->dch, FLG_PHCHANGE);
1057 }
1058
1059 fill_isoc_urb(urb, fifo->hw->dev, fifo->pipe,
1060 context_iso_urb->buffer, num_isoc_packets,
1061 fifo->usb_packet_maxlen, fifo->intervall,
1062 (usb_complete_t)rx_iso_complete, urb->context);
1063 errcode = usb_submit_urb(urb, GFP_ATOMIC);
1064 if (errcode < 0) {
1065 if (debug & DEBUG_HW)
1066 printk(KERN_DEBUG "%s: %s: error submitting "
475be4d8
JP		 1067 "ISO URB: %d\n",
1068 hw->name, __func__, errcode);
69f52adb
KK		 1069 }
1070 } else {
1071 if (status && (debug & DBG_HFC_URB_INFO))
1072 printk(KERN_DEBUG "%s: %s: rx_iso_complete : "
475be4d8
JP		 1073 "urb->status %d, fifonum %d\n",
1074 hw->name, __func__, status, fifon);
69f52adb
KK		 1075 }
1076}
1077
1078/* receive completion routine for all interrupt rx fifos */
1079static void
1080rx_int_complete(struct urb *urb)
1081{
1082 int len, status, i;
1083 __u8 *buf, maxlen, fifon;
1084 struct usb_fifo *fifo = (struct usb_fifo *) urb->context;
1085 struct hfcsusb *hw = fifo->hw;
1086 static __u8 eof[8];
16630f54 1087 unsigned long flags;
69f52adb 1088
16630f54 1089 spin_lock_irqsave(&hw->lock, flags);
69f52adb
KK		 1090 if (fifo->stop_gracefull) {
1091 fifo->stop_gracefull = 0;
1092 fifo->active = 0;
16630f54 1093 spin_unlock_irqrestore(&hw->lock, flags);
69f52adb
KK		 1094 return;
1095 }
16630f54 1096 spin_unlock_irqrestore(&hw->lock, flags);
69f52adb
KK		 1097
1098 fifon = fifo->fifonum;
1099 if ((!fifo->active) || (urb->status)) {
1100 if (debug & DBG_HFC_URB_ERROR)
1101 printk(KERN_DEBUG
475be4d8
JP		 1102 "%s: %s: RX-Fifo %i is going down (%i)\n",
1103 hw->name, __func__, fifon, urb->status);
69f52adb
KK		 1104
1105 fifo->urb->interval = 0; /* cancel automatic rescheduling */
1106 return;
1107 }
1108 len = urb->actual_length;
1109 buf = fifo->buffer;
1110 maxlen = fifo->usb_packet_maxlen;
1111
1112 /* USB data log for every D INT in */
1113 if ((fifon == HFCUSB_D_RX) && (debug & DBG_HFC_USB_VERBOSE)) {
1114 printk(KERN_DEBUG "%s: %s: D RX INT len(%d) ",
475be4d8 1115 hw->name, __func__, len);
69f52adb
KK		 1116 for (i = 0; i < len; i++)
1117 printk("%02x ", buf[i]);
1118 printk("\n");
1119 }
1120
1121 if (fifo->last_urblen != fifo->usb_packet_maxlen) {
1122 /* the threshold mask is in the 2nd status byte */
1123 hw->threshold_mask = buf[1];
1124
1125 /* signal S0 layer1 state change */
1126 if (hw->initdone && ((buf[0] >> 4) != hw->dch.state)) {
1127 hw->dch.state = (buf[0] >> 4);
1128 schedule_event(&hw->dch, FLG_PHCHANGE);
1129 }
1130
1131 eof[fifon] = buf[0] & 1;
1132 /* if we have more than the 2 status bytes -> collect data */
1133 if (len > 2)
1134 hfcsusb_rx_frame(fifo, buf + 2,
475be4d8
JP		 1135 urb->actual_length - 2,
1136 (len < maxlen) ? eof[fifon] : 0);
69f52adb
KK		 1137 } else {
1138 hfcsusb_rx_frame(fifo, buf, urb->actual_length,
1139 (len < maxlen) ? eof[fifon] : 0);
1140 }
1141 fifo->last_urblen = urb->actual_length;
1142
1143 status = usb_submit_urb(urb, GFP_ATOMIC);
1144 if (status) {
1145 if (debug & DEBUG_HW)
1146 printk(KERN_DEBUG "%s: %s: error resubmitting USB\n",
475be4d8 1147 hw->name, __func__);
69f52adb
KK		 1148 }
1149}
1150
1151/* transmit completion routine for all ISO tx fifos */
1152static void
1153tx_iso_complete(struct urb *urb)
1154{
1155 struct iso_urb *context_iso_urb = (struct iso_urb *) urb->context;
1156 struct usb_fifo *fifo = context_iso_urb->owner_fifo;
1157 struct hfcsusb *hw = fifo->hw;
1158 struct sk_buff *tx_skb;
1159 int k, tx_offset, num_isoc_packets, sink, remain, current_len,
475be4d8 1160 errcode, hdlc, i;
69f52adb 1161 int *tx_idx;
6d1ee48f
KK		 1162 int frame_complete, fifon, status, fillempty = 0;
1163 __u8 threshbit, *p;
16630f54 1164 unsigned long flags;
69f52adb 1165
16630f54 1166 spin_lock_irqsave(&hw->lock, flags);
69f52adb
KK		 1167 if (fifo->stop_gracefull) {
1168 fifo->stop_gracefull = 0;
1169 fifo->active = 0;
16630f54 1170 spin_unlock_irqrestore(&hw->lock, flags);
69f52adb
KK		 1171 return;
1172 }
1173
1174 if (fifo->dch) {
1175 tx_skb = fifo->dch->tx_skb;
1176 tx_idx = &fifo->dch->tx_idx;
1177 hdlc = 1;
1178 } else if (fifo->bch) {
1179 tx_skb = fifo->bch->tx_skb;
1180 tx_idx = &fifo->bch->tx_idx;
1181 hdlc = test_bit(FLG_HDLC, &fifo->bch->Flags);
6d1ee48f
KK		 1182 if (!tx_skb && !hdlc &&
1183 test_bit(FLG_FILLEMPTY, &fifo->bch->Flags))
1184 fillempty = 1;
69f52adb
KK		 1185 } else {
1186 printk(KERN_DEBUG "%s: %s: neither BCH nor DCH\n",
475be4d8 1187 hw->name, __func__);
16630f54 1188 spin_unlock_irqrestore(&hw->lock, flags);
69f52adb
KK		 1189 return;
1190 }
1191
1192 fifon = fifo->fifonum;
1193 status = urb->status;
1194
1195 tx_offset = 0;
1196
1197 /*
1198 * ISO transfer only partially completed,
1199 * look at individual frame status for details
1200 */
1201 if (status == -EXDEV) {
1202 if (debug & DBG_HFC_URB_ERROR)
1203 printk(KERN_DEBUG "%s: %s: "
475be4d8
JP		 1204 "-EXDEV (%i) fifon (%d)\n",
1205 hw->name, __func__, status, fifon);
69f52adb
KK		 1206
1207 /* clear status, so go on with ISO transfers */
1208 status = 0;
1209 }
1210
1211 if (fifo->active && !status) {
1212 /* is FifoFull-threshold set for our channel? */
1213 threshbit = (hw->threshold_mask & (1 << fifon));
1214 num_isoc_packets = iso_packets[fifon];
1215
1216 /* predict dataflow to avoid fifo overflow */
1217 if (fifon >= HFCUSB_D_TX)
1218 sink = (threshbit) ? SINK_DMIN : SINK_DMAX;
1219 else
1220 sink = (threshbit) ? SINK_MIN : SINK_MAX;
1221 fill_isoc_urb(urb, fifo->hw->dev, fifo->pipe,
1222 context_iso_urb->buffer, num_isoc_packets,
1223 fifo->usb_packet_maxlen, fifo->intervall,
1224 (usb_complete_t)tx_iso_complete, urb->context);
1225 memset(context_iso_urb->buffer, 0,
1226 sizeof(context_iso_urb->buffer));
1227 frame_complete = 0;
1228
1229 for (k = 0; k < num_isoc_packets; ++k) {
1230 /* analyze tx success of previous ISO packets */
1231 if (debug & DBG_HFC_URB_ERROR) {
1232 errcode = urb->iso_frame_desc[k].status;
1233 if (errcode) {
1234 printk(KERN_DEBUG "%s: %s: "
475be4d8
JP		 1235 "ISO packet %i, status: %i\n",
1236 hw->name, __func__, k, errcode);
69f52adb
KK		 1237 }
1238 }
1239
1240 /* Generate next ISO Packets */
1241 if (tx_skb)
1242 remain = tx_skb->len - *tx_idx;
6d1ee48f
KK		 1243 else if (fillempty)
1244 remain = 15; /* > not complete */
69f52adb
KK		 1245 else
1246 remain = 0;
1247
1248 if (remain > 0) {
1249 fifo->bit_line -= sink;
1250 current_len = (0 - fifo->bit_line) / 8;
1251 if (current_len > 14)
1252 current_len = 14;
1253 if (current_len < 0)
1254 current_len = 0;
1255 if (remain < current_len)
1256 current_len = remain;
1257
1258 /* how much bit do we put on the line? */
1259 fifo->bit_line += current_len * 8;
1260
1261 context_iso_urb->buffer[tx_offset] = 0;
1262 if (current_len == remain) {
1263 if (hdlc) {
1264 /* signal frame completion */
1265 context_iso_urb->
475be4d8 1266 buffer[tx_offset] = 1;
69f52adb
KK		 1267 /* add 2 byte flags and 16bit
1268 * CRC at end of ISDN frame */
1269 fifo->bit_line += 32;
1270 }
1271 frame_complete = 1;
1272 }
1273
1274 /* copy tx data to iso-urb buffer */
6d1ee48f
KK		 1275 p = context_iso_urb->buffer + tx_offset + 1;
1276 if (fillempty) {
1277 memset(p, fifo->bch->fill[0],
1278 current_len);
1279 } else {
1280 memcpy(p, (tx_skb->data + *tx_idx),
1281 current_len);
1282 *tx_idx += current_len;
1283 }
69f52adb
KK		 1284 urb->iso_frame_desc[k].offset = tx_offset;
1285 urb->iso_frame_desc[k].length = current_len + 1;
1286
1287 /* USB data log for every D ISO out */
6d1ee48f 1288 if ((fifon == HFCUSB_D_RX) && !fillempty &&
69f52adb
KK		 1289 (debug & DBG_HFC_USB_VERBOSE)) {
1290 printk(KERN_DEBUG
475be4d8
JP		 1291 "%s: %s (%d/%d) offs(%d) len(%d) ",
1292 hw->name, __func__,
1293 k, num_isoc_packets - 1,
1294 urb->iso_frame_desc[k].offset,
1295 urb->iso_frame_desc[k].length);
69f52adb
KK		 1296
1297 for (i = urb->iso_frame_desc[k].offset;
1298 i < (urb->iso_frame_desc[k].offset
475be4d8 1299 + urb->iso_frame_desc[k].length);
69f52adb
KK		 1300 i++)
1301 printk("%x ",
475be4d8 1302 context_iso_urb->buffer[i]);
69f52adb
KK		 1303
1304 printk(" skb->len(%i) tx-idx(%d)\n",
475be4d8 1305 tx_skb->len, *tx_idx);
69f52adb
KK		 1306 }
1307
1308 tx_offset += (current_len + 1);
1309 } else {
1310 urb->iso_frame_desc[k].offset = tx_offset++;
1311 urb->iso_frame_desc[k].length = 1;
1312 /* we lower data margin every msec */
1313 fifo->bit_line -= sink;
1314 if (fifo->bit_line < BITLINE_INF)
1315 fifo->bit_line = BITLINE_INF;
1316 }
1317
1318 if (frame_complete) {
1319 frame_complete = 0;
1320
1321 if (debug & DBG_HFC_FIFO_VERBOSE) {
1322 printk(KERN_DEBUG "%s: %s: "
475be4d8
JP		 1323 "fifon(%i) new TX len(%i): ",
1324 hw->name, __func__,
1325 fifon, tx_skb->len);
69f52adb
KK		 1326 i = 0;
1327 while (i < tx_skb->len)
1328 printk("%02x ",
475be4d8 1329 tx_skb->data[i++]);
69f52adb
KK		 1330 printk("\n");
1331 }
1332
1333 dev_kfree_skb(tx_skb);
1334 tx_skb = NULL;
1335 if (fifo->dch && get_next_dframe(fifo->dch))
1336 tx_skb = fifo->dch->tx_skb;
1337 else if (fifo->bch &&
8bfddfbe 1338 get_next_bframe(fifo->bch))
69f52adb 1339 tx_skb = fifo->bch->tx_skb;
69f52adb
KK		 1340 }
1341 }
1342 errcode = usb_submit_urb(urb, GFP_ATOMIC);
1343 if (errcode < 0) {
1344 if (debug & DEBUG_HW)
1345 printk(KERN_DEBUG
475be4d8
JP		 1346 "%s: %s: error submitting ISO URB: %d \n",
1347 hw->name, __func__, errcode);
69f52adb
KK		 1348 }
1349
1350 /*
1351 * abuse DChannel tx iso completion to trigger NT mode state
1352 * changes tx_iso_complete is assumed to be called every
1353 * fifo->intervall (ms)
1354 */
1355 if ((fifon == HFCUSB_D_TX) && (hw->protocol == ISDN_P_NT_S0)
1356 && (hw->timers & NT_ACTIVATION_TIMER)) {
1357 if ((--hw->nt_timer) < 0)
1358 schedule_event(&hw->dch, FLG_PHCHANGE);
1359 }
1360
1361 } else {
1362 if (status && (debug & DBG_HFC_URB_ERROR))
1363 printk(KERN_DEBUG "%s: %s: urb->status %s (%i)"
475be4d8
JP		 1364 "fifonum=%d\n",
1365 hw->name, __func__,
1366 symbolic(urb_errlist, status), status, fifon);
69f52adb 1367 }
16630f54 1368 spin_unlock_irqrestore(&hw->lock, flags);
69f52adb
KK		 1369}
1370
1371/*
1372 * allocs urbs and start isoc transfer with two pending urbs to avoid
1373 * gaps in the transfer chain
1374 */
1375static int
1376start_isoc_chain(struct usb_fifo *fifo, int num_packets_per_urb,
1377 usb_complete_t complete, int packet_size)
1378{
1379 struct hfcsusb *hw = fifo->hw;
1380 int i, k, errcode;
1381
1382 if (debug)
1383 printk(KERN_DEBUG "%s: %s: fifo %i\n",
475be4d8 1384 hw->name, __func__, fifo->fifonum);
69f52adb
KK		 1385
1386 /* allocate Memory for Iso out Urbs */
1387 for (i = 0; i < 2; i++) {
1388 if (!(fifo->iso[i].urb)) {
1389 fifo->iso[i].urb =
475be4d8 1390 usb_alloc_urb(num_packets_per_urb, GFP_KERNEL);
69f52adb
KK		 1391 if (!(fifo->iso[i].urb)) {
1392 printk(KERN_DEBUG
475be4d8
JP		 1393 "%s: %s: alloc urb for fifo %i failed",
1394 hw->name, __func__, fifo->fifonum);
a0d57a55 1395 continue;
69f52adb
KK		 1396 }
1397 fifo->iso[i].owner_fifo = (struct usb_fifo *) fifo;
1398 fifo->iso[i].indx = i;
1399
1400 /* Init the first iso */
1401 if (ISO_BUFFER_SIZE >=
1402 (fifo->usb_packet_maxlen *
1403 num_packets_per_urb)) {
1404 fill_isoc_urb(fifo->iso[i].urb,
475be4d8
JP		 1405 fifo->hw->dev, fifo->pipe,
1406 fifo->iso[i].buffer,
1407 num_packets_per_urb,
1408 fifo->usb_packet_maxlen,
1409 fifo->intervall, complete,
1410 &fifo->iso[i]);
69f52adb
KK		 1411 memset(fifo->iso[i].buffer, 0,
1412 sizeof(fifo->iso[i].buffer));
1413
1414 for (k = 0; k < num_packets_per_urb; k++) {
1415 fifo->iso[i].urb->
475be4d8
JP		 1416 iso_frame_desc[k].offset =
1417 k * packet_size;
69f52adb 1418 fifo->iso[i].urb->
475be4d8
JP		 1419 iso_frame_desc[k].length =
1420 packet_size;
69f52adb
KK		 1421 }
1422 } else {
1423 printk(KERN_DEBUG
475be4d8
JP		 1424 "%s: %s: ISO Buffer size to small!\n",
1425 hw->name, __func__);
69f52adb
KK		 1426 }
1427 }
1428 fifo->bit_line = BITLINE_INF;
1429
1430 errcode = usb_submit_urb(fifo->iso[i].urb, GFP_KERNEL);
1431 fifo->active = (errcode >= 0) ? 1 : 0;
1432 fifo->stop_gracefull = 0;
1433 if (errcode < 0) {
1434 printk(KERN_DEBUG "%s: %s: %s URB nr:%d\n",
475be4d8
JP		 1435 hw->name, __func__,
1436 symbolic(urb_errlist, errcode), i);
69f52adb
KK		 1437 }
1438 }
1439 return fifo->active;
1440}
1441
1442static void
1443stop_iso_gracefull(struct usb_fifo *fifo)
1444{
1445 struct hfcsusb *hw = fifo->hw;
1446 int i, timeout;
1447 u_long flags;
1448
1449 for (i = 0; i < 2; i++) {
1450 spin_lock_irqsave(&hw->lock, flags);
1451 if (debug)
1452 printk(KERN_DEBUG "%s: %s for fifo %i.%i\n",
1453 hw->name, __func__, fifo->fifonum, i);
1454 fifo->stop_gracefull = 1;
1455 spin_unlock_irqrestore(&hw->lock, flags);
1456 }
1457
1458 for (i = 0; i < 2; i++) {
1459 timeout = 3;
1460 while (fifo->stop_gracefull && timeout--)
475be4d8 1461 schedule_timeout_interruptible((HZ / 1000) * 16);
69f52adb
KK		 1462 if (debug && fifo->stop_gracefull)
1463 printk(KERN_DEBUG "%s: ERROR %s for fifo %i.%i\n",
475be4d8 1464 hw->name, __func__, fifo->fifonum, i);
69f52adb
KK		 1465 }
1466}
1467
1468static void
1469stop_int_gracefull(struct usb_fifo *fifo)
1470{
1471 struct hfcsusb *hw = fifo->hw;
1472 int timeout;
1473 u_long flags;
1474
1475 spin_lock_irqsave(&hw->lock, flags);
1476 if (debug)
1477 printk(KERN_DEBUG "%s: %s for fifo %i\n",
1478 hw->name, __func__, fifo->fifonum);
1479 fifo->stop_gracefull = 1;
1480 spin_unlock_irqrestore(&hw->lock, flags);
1481
1482 timeout = 3;
1483 while (fifo->stop_gracefull && timeout--)
475be4d8 1484 schedule_timeout_interruptible((HZ / 1000) * 3);
69f52adb
KK		 1485 if (debug && fifo->stop_gracefull)
1486 printk(KERN_DEBUG "%s: ERROR %s for fifo %i\n",
1487 hw->name, __func__, fifo->fifonum);
1488}
1489
1490/* start the interrupt transfer for the given fifo */
1491static void
1492start_int_fifo(struct usb_fifo *fifo)
1493{
1494 struct hfcsusb *hw = fifo->hw;
1495 int errcode;
1496
1497 if (debug)
1498 printk(KERN_DEBUG "%s: %s: INT IN fifo:%d\n",
475be4d8 1499 hw->name, __func__, fifo->fifonum);
69f52adb
KK		 1500
1501 if (!fifo->urb) {
1502 fifo->urb = usb_alloc_urb(0, GFP_KERNEL);
1503 if (!fifo->urb)
1504 return;
1505 }
1506 usb_fill_int_urb(fifo->urb, fifo->hw->dev, fifo->pipe,
475be4d8
JP		 1507 fifo->buffer, fifo->usb_packet_maxlen,
1508 (usb_complete_t)rx_int_complete, fifo, fifo->intervall);
69f52adb
KK		 1509 fifo->active = 1;
1510 fifo->stop_gracefull = 0;
1511 errcode = usb_submit_urb(fifo->urb, GFP_KERNEL);
1512 if (errcode) {
1513 printk(KERN_DEBUG "%s: %s: submit URB: status:%i\n",
475be4d8 1514 hw->name, __func__, errcode);
69f52adb
KK		 1515 fifo->active = 0;
1516 }
1517}
1518
1519static void
1520setPortMode(struct hfcsusb *hw)
1521{
1522 if (debug & DEBUG_HW)
1523 printk(KERN_DEBUG "%s: %s %s\n", hw->name, __func__,
475be4d8 1524 (hw->protocol == ISDN_P_TE_S0) ? "TE" : "NT");
69f52adb
KK		 1525
1526 if (hw->protocol == ISDN_P_TE_S0) {
1527 write_reg(hw, HFCUSB_SCTRL, 0x40);
1528 write_reg(hw, HFCUSB_SCTRL_E, 0x00);
1529 write_reg(hw, HFCUSB_CLKDEL, CLKDEL_TE);
1530 write_reg(hw, HFCUSB_STATES, 3 | 0x10);
1531 write_reg(hw, HFCUSB_STATES, 3);
1532 } else {
1533 write_reg(hw, HFCUSB_SCTRL, 0x44);
1534 write_reg(hw, HFCUSB_SCTRL_E, 0x09);
1535 write_reg(hw, HFCUSB_CLKDEL, CLKDEL_NT);
1536 write_reg(hw, HFCUSB_STATES, 1 | 0x10);
1537 write_reg(hw, HFCUSB_STATES, 1);
1538 }
1539}
1540
1541static void
1542reset_hfcsusb(struct hfcsusb *hw)
1543{
1544 struct usb_fifo *fifo;
1545 int i;
1546
1547 if (debug & DEBUG_HW)
1548 printk(KERN_DEBUG "%s: %s\n", hw->name, __func__);
1549
1550 /* do Chip reset */
1551 write_reg(hw, HFCUSB_CIRM, 8);
1552
1553 /* aux = output, reset off */
1554 write_reg(hw, HFCUSB_CIRM, 0x10);
1555
1556 /* set USB_SIZE to match the wMaxPacketSize for INT or BULK transfers */
1557 write_reg(hw, HFCUSB_USB_SIZE, (hw->packet_size / 8) |
475be4d8 1558 ((hw->packet_size / 8) << 4));
69f52adb
KK		 1559
1560 /* set USB_SIZE_I to match the the wMaxPacketSize for ISO transfers */
1561 write_reg(hw, HFCUSB_USB_SIZE_I, hw->iso_packet_size);
1562
1563 /* enable PCM/GCI master mode */
1564 write_reg(hw, HFCUSB_MST_MODE1, 0); /* set default values */
1565 write_reg(hw, HFCUSB_MST_MODE0, 1); /* enable master mode */
1566
1567 /* init the fifos */
1568 write_reg(hw, HFCUSB_F_THRES,
475be4d8 1569 (HFCUSB_TX_THRESHOLD / 8) | ((HFCUSB_RX_THRESHOLD / 8) << 4));
69f52adb
KK		 1570
1571 fifo = hw->fifos;
1572 for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1573 write_reg(hw, HFCUSB_FIFO, i); /* select the desired fifo */
1574 fifo[i].max_size =
475be4d8 1575 (i <= HFCUSB_B2_RX) ? MAX_BCH_SIZE : MAX_DFRAME_LEN;
69f52adb
KK		 1576 fifo[i].last_urblen = 0;
1577
1578 /* set 2 bit for D- & E-channel */
1579 write_reg(hw, HFCUSB_HDLC_PAR, ((i <= HFCUSB_B2_RX) ? 0 : 2));
1580
1581 /* enable all fifos */
1582 if (i == HFCUSB_D_TX)
1583 write_reg(hw, HFCUSB_CON_HDLC,
475be4d8 1584 (hw->protocol == ISDN_P_NT_S0) ? 0x08 : 0x09);
69f52adb
KK		 1585 else
1586 write_reg(hw, HFCUSB_CON_HDLC, 0x08);
1587 write_reg(hw, HFCUSB_INC_RES_F, 2); /* reset the fifo */
1588 }
1589
1590 write_reg(hw, HFCUSB_SCTRL_R, 0); /* disable both B receivers */
1591 handle_led(hw, LED_POWER_ON);
1592}
1593
1594/* start USB data pipes dependand on device's endpoint configuration */
1595static void
1596hfcsusb_start_endpoint(struct hfcsusb *hw, int channel)
1597{
1598 /* quick check if endpoint already running */
1599 if ((channel == HFC_CHAN_D) && (hw->fifos[HFCUSB_D_RX].active))
1600 return;
1601 if ((channel == HFC_CHAN_B1) && (hw->fifos[HFCUSB_B1_RX].active))
1602 return;
1603 if ((channel == HFC_CHAN_B2) && (hw->fifos[HFCUSB_B2_RX].active))
1604 return;
1605 if ((channel == HFC_CHAN_E) && (hw->fifos[HFCUSB_PCM_RX].active))
1606 return;
1607
1608 /* start rx endpoints using USB INT IN method */
1609 if (hw->cfg_used == CNF_3INT3ISO || hw->cfg_used == CNF_4INT3ISO)
475be4d8 1610 start_int_fifo(hw->fifos + channel * 2 + 1);
69f52adb
KK		 1611
1612 /* start rx endpoints using USB ISO IN method */
1613 if (hw->cfg_used == CNF_3ISO3ISO || hw->cfg_used == CNF_4ISO3ISO) {
1614 switch (channel) {
1615 case HFC_CHAN_D:
1616 start_isoc_chain(hw->fifos + HFCUSB_D_RX,
475be4d8
JP		 1617 ISOC_PACKETS_D,
1618 (usb_complete_t)rx_iso_complete,
1619 16);
69f52adb
KK		 1620 break;
1621 case HFC_CHAN_E:
1622 start_isoc_chain(hw->fifos + HFCUSB_PCM_RX,
475be4d8
JP		 1623 ISOC_PACKETS_D,
1624 (usb_complete_t)rx_iso_complete,
1625 16);
69f52adb
KK		 1626 break;
1627 case HFC_CHAN_B1:
1628 start_isoc_chain(hw->fifos + HFCUSB_B1_RX,
475be4d8
JP		 1629 ISOC_PACKETS_B,
1630 (usb_complete_t)rx_iso_complete,
1631 16);
69f52adb
KK		 1632 break;
1633 case HFC_CHAN_B2:
1634 start_isoc_chain(hw->fifos + HFCUSB_B2_RX,
475be4d8
JP		 1635 ISOC_PACKETS_B,
1636 (usb_complete_t)rx_iso_complete,
1637 16);
69f52adb
KK		 1638 break;
1639 }
1640 }
1641
1642 /* start tx endpoints using USB ISO OUT method */
1643 switch (channel) {
1644 case HFC_CHAN_D:
1645 start_isoc_chain(hw->fifos + HFCUSB_D_TX,
475be4d8
JP		 1646 ISOC_PACKETS_B,
1647 (usb_complete_t)tx_iso_complete, 1);
69f52adb
KK		 1648 break;
1649 case HFC_CHAN_B1:
1650 start_isoc_chain(hw->fifos + HFCUSB_B1_TX,
475be4d8
JP		 1651 ISOC_PACKETS_D,
1652 (usb_complete_t)tx_iso_complete, 1);
69f52adb
KK		 1653 break;
1654 case HFC_CHAN_B2:
1655 start_isoc_chain(hw->fifos + HFCUSB_B2_TX,
475be4d8
JP		 1656 ISOC_PACKETS_B,
1657 (usb_complete_t)tx_iso_complete, 1);
69f52adb
KK		 1658 break;
1659 }
1660}
1661
1662/* stop USB data pipes dependand on device's endpoint configuration */
1663static void
1664hfcsusb_stop_endpoint(struct hfcsusb *hw, int channel)
1665{
1666 /* quick check if endpoint currently running */
1667 if ((channel == HFC_CHAN_D) && (!hw->fifos[HFCUSB_D_RX].active))
1668 return;
1669 if ((channel == HFC_CHAN_B1) && (!hw->fifos[HFCUSB_B1_RX].active))
1670 return;
1671 if ((channel == HFC_CHAN_B2) && (!hw->fifos[HFCUSB_B2_RX].active))
1672 return;
1673 if ((channel == HFC_CHAN_E) && (!hw->fifos[HFCUSB_PCM_RX].active))
1674 return;
1675
1676 /* rx endpoints using USB INT IN method */
1677 if (hw->cfg_used == CNF_3INT3ISO || hw->cfg_used == CNF_4INT3ISO)
475be4d8 1678 stop_int_gracefull(hw->fifos + channel * 2 + 1);
69f52adb
KK		 1679
1680 /* rx endpoints using USB ISO IN method */
1681 if (hw->cfg_used == CNF_3ISO3ISO || hw->cfg_used == CNF_4ISO3ISO)
475be4d8 1682 stop_iso_gracefull(hw->fifos + channel * 2 + 1);
69f52adb
KK		 1683
1684 /* tx endpoints using USB ISO OUT method */
1685 if (channel != HFC_CHAN_E)
475be4d8 1686 stop_iso_gracefull(hw->fifos + channel * 2);
69f52adb
KK		 1687}
1688
1689
1690/* Hardware Initialization */
6c2959aa 1691static int
69f52adb
KK		 1692setup_hfcsusb(struct hfcsusb *hw)
1693{
d8a1de3d 1694 void *dmabuf = kmalloc(sizeof(u_char), GFP_KERNEL);
69f52adb 1695 u_char b;
d8a1de3d 1696 int ret;
69f52adb
KK		 1697
1698 if (debug & DBG_HFC_CALL_TRACE)
1699 printk(KERN_DEBUG "%s: %s\n", hw->name, __func__);
1700
d8a1de3d
JR		 1701 if (!dmabuf)
1702 return -ENOMEM;
1703
1704 ret = read_reg_atomic(hw, HFCUSB_CHIP_ID, dmabuf);
1705
1706 memcpy(&b, dmabuf, sizeof(u_char));
1707 kfree(dmabuf);
1708
69f52adb 1709 /* check the chip id */
d8a1de3d 1710 if (ret != 1) {
69f52adb 1711 printk(KERN_DEBUG "%s: %s: cannot read chip id\n",
475be4d8 1712 hw->name, __func__);
69f52adb
KK		 1713 return 1;
1714 }
1715 if (b != HFCUSB_CHIPID) {
1716 printk(KERN_DEBUG "%s: %s: Invalid chip id 0x%02x\n",
475be4d8 1717 hw->name, __func__, b);
69f52adb
KK		 1718 return 1;
1719 }
1720
1721 /* first set the needed config, interface and alternate */
3c76c58f 1722 (void) usb_set_interface(hw->dev, hw->if_used, hw->alt_used);
69f52adb
KK		 1723
1724 hw->led_state = 0;
1725
1726 /* init the background machinery for control requests */
1727 hw->ctrl_read.bRequestType = 0xc0;
1728 hw->ctrl_read.bRequest = 1;
1729 hw->ctrl_read.wLength = cpu_to_le16(1);
1730 hw->ctrl_write.bRequestType = 0x40;
1731 hw->ctrl_write.bRequest = 0;
1732 hw->ctrl_write.wLength = 0;
1733 usb_fill_control_urb(hw->ctrl_urb, hw->dev, hw->ctrl_out_pipe,
475be4d8
JP		 1734 (u_char *)&hw->ctrl_write, NULL, 0,
1735 (usb_complete_t)ctrl_complete, hw);
69f52adb
KK		 1736
1737 reset_hfcsusb(hw);
1738 return 0;
1739}
1740
1741static void
1742release_hw(struct hfcsusb *hw)
1743{
1744 if (debug & DBG_HFC_CALL_TRACE)
1745 printk(KERN_DEBUG "%s: %s\n", hw->name, __func__);
1746
1747 /*
1748 * stop all endpoints gracefully
1749 * TODO: mISDN_core should generate CLOSE_CHANNEL
1750 * signals after calling mISDN_unregister_device()
1751 */
1752 hfcsusb_stop_endpoint(hw, HFC_CHAN_D);
1753 hfcsusb_stop_endpoint(hw, HFC_CHAN_B1);
1754 hfcsusb_stop_endpoint(hw, HFC_CHAN_B2);
1755 if (hw->fifos[HFCUSB_PCM_RX].pipe)
1756 hfcsusb_stop_endpoint(hw, HFC_CHAN_E);
1757 if (hw->protocol == ISDN_P_TE_S0)
1758 l1_event(hw->dch.l1, CLOSE_CHANNEL);
1759
1760 mISDN_unregister_device(&hw->dch.dev);
1761 mISDN_freebchannel(&hw->bch[1]);
1762 mISDN_freebchannel(&hw->bch[0]);
1763 mISDN_freedchannel(&hw->dch);
1764
1765 if (hw->ctrl_urb) {
1766 usb_kill_urb(hw->ctrl_urb);
1767 usb_free_urb(hw->ctrl_urb);
1768 hw->ctrl_urb = NULL;
1769 }
1770
1771 if (hw->intf)
1772 usb_set_intfdata(hw->intf, NULL);
1773 list_del(&hw->list);
1774 kfree(hw);
1775 hw = NULL;
1776}
1777
1778static void
1779deactivate_bchannel(struct bchannel *bch)
1780{
1781 struct hfcsusb *hw = bch->hw;
1782 u_long flags;
1783
1784 if (bch->debug & DEBUG_HW)
1785 printk(KERN_DEBUG "%s: %s: bch->nr(%i)\n",
475be4d8 1786 hw->name, __func__, bch->nr);
69f52adb
KK		 1787
1788 spin_lock_irqsave(&hw->lock, flags);
fb286f04 1789 mISDN_clear_bchannel(bch);
69f52adb
KK		 1790 spin_unlock_irqrestore(&hw->lock, flags);
1791 hfcsusb_setup_bch(bch, ISDN_P_NONE);
37952cfa 1792 hfcsusb_stop_endpoint(hw, bch->nr - 1);
69f52adb
KK		 1793}
1794
1795/*
1796 * Layer 1 B-channel hardware access
1797 */
1798static int
1799hfc_bctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
1800{
1801 struct bchannel *bch = container_of(ch, struct bchannel, ch);
1802 int ret = -EINVAL;
1803
1804 if (bch->debug & DEBUG_HW)
1805 printk(KERN_DEBUG "%s: cmd:%x %p\n", __func__, cmd, arg);
1806
1807 switch (cmd) {
1808 case HW_TESTRX_RAW:
1809 case HW_TESTRX_HDLC:
1810 case HW_TESTRX_OFF:
1811 ret = -EINVAL;
1812 break;
1813
1814 case CLOSE_CHANNEL:
1815 test_and_clear_bit(FLG_OPEN, &bch->Flags);
1368112c 1816 deactivate_bchannel(bch);
69f52adb
KK		 1817 ch->protocol = ISDN_P_NONE;
1818 ch->peer = NULL;
1819 module_put(THIS_MODULE);
1820 ret = 0;
1821 break;
1822 case CONTROL_CHANNEL:
1823 ret = channel_bctrl(bch, arg);
1824 break;
1825 default:
1826 printk(KERN_WARNING "%s: unknown prim(%x)\n",
475be4d8 1827 __func__, cmd);
69f52adb
KK		 1828 }
1829 return ret;
1830}
1831
1832static int
1833setup_instance(struct hfcsusb *hw, struct device *parent)
1834{
1835 u_long flags;
1836 int err, i;
1837
1838 if (debug & DBG_HFC_CALL_TRACE)
1839 printk(KERN_DEBUG "%s: %s\n", hw->name, __func__);
1840
1841 spin_lock_init(&hw->ctrl_lock);
1842 spin_lock_init(&hw->lock);
1843
1844 mISDN_initdchannel(&hw->dch, MAX_DFRAME_LEN_L1, ph_state);
1845 hw->dch.debug = debug & 0xFFFF;
1846 hw->dch.hw = hw;
1847 hw->dch.dev.Dprotocols = (1 << ISDN_P_TE_S0) | (1 << ISDN_P_NT_S0);
1848 hw->dch.dev.D.send = hfcusb_l2l1D;
1849 hw->dch.dev.D.ctrl = hfc_dctrl;
1850
1851 /* enable E-Channel logging */
1852 if (hw->fifos[HFCUSB_PCM_RX].pipe)
1853 mISDN_initdchannel(&hw->ech, MAX_DFRAME_LEN_L1, NULL);
1854
1855 hw->dch.dev.Bprotocols = (1 << (ISDN_P_B_RAW & ISDN_P_B_MASK)) |
475be4d8 1856 (1 << (ISDN_P_B_HDLC & ISDN_P_B_MASK));
69f52adb
KK		 1857 hw->dch.dev.nrbchan = 2;
1858 for (i = 0; i < 2; i++) {
1859 hw->bch[i].nr = i + 1;
1860 set_channelmap(i + 1, hw->dch.dev.channelmap);
1861 hw->bch[i].debug = debug;
034005a0 1862 mISDN_initbchannel(&hw->bch[i], MAX_DATA_MEM, poll >> 1);
69f52adb
KK		 1863 hw->bch[i].hw = hw;
1864 hw->bch[i].ch.send = hfcusb_l2l1B;
1865 hw->bch[i].ch.ctrl = hfc_bctrl;
1866 hw->bch[i].ch.nr = i + 1;
1867 list_add(&hw->bch[i].ch.list, &hw->dch.dev.bchannels);
1868 }
1869
1870 hw->fifos[HFCUSB_B1_TX].bch = &hw->bch[0];
1871 hw->fifos[HFCUSB_B1_RX].bch = &hw->bch[0];
1872 hw->fifos[HFCUSB_B2_TX].bch = &hw->bch[1];
1873 hw->fifos[HFCUSB_B2_RX].bch = &hw->bch[1];
1874 hw->fifos[HFCUSB_D_TX].dch = &hw->dch;
1875 hw->fifos[HFCUSB_D_RX].dch = &hw->dch;
1876 hw->fifos[HFCUSB_PCM_RX].ech = &hw->ech;
1877 hw->fifos[HFCUSB_PCM_TX].ech = &hw->ech;
1878
1879 err = setup_hfcsusb(hw);
1880 if (err)
1881 goto out;
1882
1883 snprintf(hw->name, MISDN_MAX_IDLEN - 1, "%s.%d", DRIVER_NAME,
475be4d8 1884 hfcsusb_cnt + 1);
69f52adb 1885 printk(KERN_INFO "%s: registered as '%s'\n",
475be4d8 1886 DRIVER_NAME, hw->name);
69f52adb
KK		 1887
1888 err = mISDN_register_device(&hw->dch.dev, parent, hw->name);
1889 if (err)
1890 goto out;
1891
1892 hfcsusb_cnt++;
1893 write_lock_irqsave(&HFClock, flags);
1894 list_add_tail(&hw->list, &HFClist);
1895 write_unlock_irqrestore(&HFClock, flags);
1896 return 0;
1897
1898out:
1899 mISDN_freebchannel(&hw->bch[1]);
1900 mISDN_freebchannel(&hw->bch[0]);
1901 mISDN_freedchannel(&hw->dch);
1902 kfree(hw);
1903 return err;
1904}
1905
1906static int
1907hfcsusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1908{
1909 struct hfcsusb *hw;
1910 struct usb_device *dev = interface_to_usbdev(intf);
1911 struct usb_host_interface *iface = intf->cur_altsetting;
1912 struct usb_host_interface *iface_used = NULL;
1913 struct usb_host_endpoint *ep;
1914 struct hfcsusb_vdata *driver_info;
1915 int ifnum = iface->desc.bInterfaceNumber, i, idx, alt_idx,
475be4d8
JP		 1916 probe_alt_setting, vend_idx, cfg_used, *vcf, attr, cfg_found,
1917 ep_addr, cmptbl[16], small_match, iso_packet_size, packet_size,
1918 alt_used = 0;
69f52adb
KK		 1919
1920 vend_idx = 0xffff;
1921 for (i = 0; hfcsusb_idtab[i].idVendor; i++) {
1922 if ((le16_to_cpu(dev->descriptor.idVendor)
475be4d8 1923 == hfcsusb_idtab[i].idVendor) &&
69f52adb 1924 (le16_to_cpu(dev->descriptor.idProduct)
475be4d8 1925 == hfcsusb_idtab[i].idProduct)) {
69f52adb
KK		 1926 vend_idx = i;
1927 continue;
1928 }
1929 }
1930
1931 printk(KERN_DEBUG
475be4d8
JP		 1932 "%s: interface(%d) actalt(%d) minor(%d) vend_idx(%d)\n",
1933 __func__, ifnum, iface->desc.bAlternateSetting,
1934 intf->minor, vend_idx);
69f52adb
KK		 1935
1936 if (vend_idx == 0xffff) {
1937 printk(KERN_WARNING
475be4d8
JP		 1938 "%s: no valid vendor found in USB descriptor\n",
1939 __func__);
69f52adb
KK		 1940 return -EIO;
1941 }
1942 /* if vendor and product ID is OK, start probing alternate settings */
1943 alt_idx = 0;
1944 small_match = -1;
1945
1946 /* default settings */
1947 iso_packet_size = 16;
1948 packet_size = 64;
1949
1950 while (alt_idx < intf->num_altsetting) {
1951 iface = intf->altsetting + alt_idx;
1952 probe_alt_setting = iface->desc.bAlternateSetting;
1953 cfg_used = 0;
1954
1955 while (validconf[cfg_used][0]) {
1956 cfg_found = 1;
1957 vcf = validconf[cfg_used];
1958 ep = iface->endpoint;
1959 memcpy(cmptbl, vcf, 16 * sizeof(int));
1960
1961 /* check for all endpoints in this alternate setting */
1962 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1963 ep_addr = ep->desc.bEndpointAddress;
1964
1965 /* get endpoint base */
1966 idx = ((ep_addr & 0x7f) - 1) * 2;
f384e62a
PT		 1967 if (idx > 15)
1968 return -EIO;
1969
69f52adb
KK		 1970 if (ep_addr & 0x80)
1971 idx++;
1972 attr = ep->desc.bmAttributes;
1973
1974 if (cmptbl[idx] != EP_NOP) {
1975 if (cmptbl[idx] == EP_NUL)
1976 cfg_found = 0;
1977 if (attr == USB_ENDPOINT_XFER_INT
475be4d8 1978 && cmptbl[idx] == EP_INT)
69f52adb
KK		 1979 cmptbl[idx] = EP_NUL;
1980 if (attr == USB_ENDPOINT_XFER_BULK
475be4d8 1981 && cmptbl[idx] == EP_BLK)
69f52adb
KK		 1982 cmptbl[idx] = EP_NUL;
1983 if (attr == USB_ENDPOINT_XFER_ISOC
475be4d8 1984 && cmptbl[idx] == EP_ISO)
69f52adb
KK		 1985 cmptbl[idx] = EP_NUL;
1986
1987 if (attr == USB_ENDPOINT_XFER_INT &&
475be4d8 1988 ep->desc.bInterval < vcf[17]) {
69f52adb
KK		 1989 cfg_found = 0;
1990 }
1991 }
1992 ep++;
1993 }
1994
1995 for (i = 0; i < 16; i++)
1996 if (cmptbl[i] != EP_NOP && cmptbl[i] != EP_NUL)
1997 cfg_found = 0;
1998
1999 if (cfg_found) {
2000 if (small_match < cfg_used) {
2001 small_match = cfg_used;
2002 alt_used = probe_alt_setting;
2003 iface_used = iface;
2004 }
2005 }
2006 cfg_used++;
2007 }
2008 alt_idx++;
2009 } /* (alt_idx < intf->num_altsetting) */
2010
2011 /* not found a valid USB Ta Endpoint config */
2012 if (small_match == -1)
2013 return -EIO;
2014
2015 iface = iface_used;
2016 hw = kzalloc(sizeof(struct hfcsusb), GFP_KERNEL);
2017 if (!hw)
2018 return -ENOMEM; /* got no mem */
2019 snprintf(hw->name, MISDN_MAX_IDLEN - 1, "%s", DRIVER_NAME);
2020
2021 ep = iface->endpoint;
2022 vcf = validconf[small_match];
2023
2024 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
2025 struct usb_fifo *f;
2026
2027 ep_addr = ep->desc.bEndpointAddress;
2028 /* get endpoint base */
2029 idx = ((ep_addr & 0x7f) - 1) * 2;
2030 if (ep_addr & 0x80)
2031 idx++;
2032 f = &hw->fifos[idx & 7];
2033
2034 /* init Endpoints */
2035 if (vcf[idx] == EP_NOP || vcf[idx] == EP_NUL) {
2036 ep++;
2037 continue;
2038 }
2039 switch (ep->desc.bmAttributes) {
2040 case USB_ENDPOINT_XFER_INT:
2041 f->pipe = usb_rcvintpipe(dev,
475be4d8 2042 ep->desc.bEndpointAddress);
69f52adb
KK		 2043 f->usb_transfer_mode = USB_INT;
2044 packet_size = le16_to_cpu(ep->desc.wMaxPacketSize);
2045 break;
2046 case USB_ENDPOINT_XFER_BULK:
2047 if (ep_addr & 0x80)
2048 f->pipe = usb_rcvbulkpipe(dev,
475be4d8 2049 ep->desc.bEndpointAddress);
69f52adb
KK		 2050 else
2051 f->pipe = usb_sndbulkpipe(dev,
475be4d8 2052 ep->desc.bEndpointAddress);
69f52adb
KK		 2053 f->usb_transfer_mode = USB_BULK;
2054 packet_size = le16_to_cpu(ep->desc.wMaxPacketSize);
2055 break;
2056 case USB_ENDPOINT_XFER_ISOC:
2057 if (ep_addr & 0x80)
2058 f->pipe = usb_rcvisocpipe(dev,
475be4d8 2059 ep->desc.bEndpointAddress);
69f52adb
KK		 2060 else
2061 f->pipe = usb_sndisocpipe(dev,
475be4d8 2062 ep->desc.bEndpointAddress);
69f52adb
KK		 2063 f->usb_transfer_mode = USB_ISOC;
2064 iso_packet_size = le16_to_cpu(ep->desc.wMaxPacketSize);
2065 break;
2066 default:
2067 f->pipe = 0;
2068 }
2069
2070 if (f->pipe) {
2071 f->fifonum = idx & 7;
2072 f->hw = hw;
2073 f->usb_packet_maxlen =
475be4d8 2074 le16_to_cpu(ep->desc.wMaxPacketSize);
69f52adb
KK		 2075 f->intervall = ep->desc.bInterval;
2076 }
2077 ep++;
2078 }
2079 hw->dev = dev; /* save device */
2080 hw->if_used = ifnum; /* save used interface */
2081 hw->alt_used = alt_used; /* and alternate config */
2082 hw->ctrl_paksize = dev->descriptor.bMaxPacketSize0; /* control size */
2083 hw->cfg_used = vcf[16]; /* store used config */
2084 hw->vend_idx = vend_idx; /* store found vendor */
2085 hw->packet_size = packet_size;
2086 hw->iso_packet_size = iso_packet_size;
2087
2088 /* create the control pipes needed for register access */
2089 hw->ctrl_in_pipe = usb_rcvctrlpipe(hw->dev, 0);
2090 hw->ctrl_out_pipe = usb_sndctrlpipe(hw->dev, 0);
2ae4605d
KK		 2091
2092 driver_info = (struct hfcsusb_vdata *)
2093 hfcsusb_idtab[vend_idx].driver_info;
2094
69f52adb 2095 hw->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
2ae4605d
KK		 2096 if (!hw->ctrl_urb) {
2097 pr_warn("%s: No memory for control urb\n",
2098 driver_info->vend_name);
2099 kfree(hw);
2100 return -ENOMEM;
2101 }
69f52adb 2102
2ae4605d
KK		 2103 pr_info("%s: %s: detected \"%s\" (%s, if=%d alt=%d)\n",
2104 hw->name, __func__, driver_info->vend_name,
2105 conf_str[small_match], ifnum, alt_used);
69f52adb
KK		 2106
2107 if (setup_instance(hw, dev->dev.parent))
2108 return -EIO;
2109
2110 hw->intf = intf;
2111 usb_set_intfdata(hw->intf, hw);
2112 return 0;
2113}
2114
2115/* function called when an active device is removed */
2116static void
2117hfcsusb_disconnect(struct usb_interface *intf)
2118{
2119 struct hfcsusb *hw = usb_get_intfdata(intf);
2120 struct hfcsusb *next;
2121 int cnt = 0;
2122
2123 printk(KERN_INFO "%s: device disconnected\n", hw->name);
2124
2125 handle_led(hw, LED_POWER_OFF);
2126 release_hw(hw);
2127
2128 list_for_each_entry_safe(hw, next, &HFClist, list)
2129 cnt++;
2130 if (!cnt)
2131 hfcsusb_cnt = 0;
2132
2133 usb_set_intfdata(intf, NULL);
2134}
2135
2136static struct usb_driver hfcsusb_drv = {
2137 .name = DRIVER_NAME,
2138 .id_table = hfcsusb_idtab,
2139 .probe = hfcsusb_probe,
2140 .disconnect = hfcsusb_disconnect,
e1f12eb6 2141 .disable_hub_initiated_lpm = 1,
69f52adb
KK		 2142};
2143
fe748483 2144module_usb_driver(hfcsusb_drv);
Linux 6.x block layer and io_uring tree(s)