/home/lenb/src/to-linus-stable branch 'acpi-2.6.12'
[linux-2.6] / drivers / isdn / hisax / hfc_usb.c
1 /*
2  * hfc_usb.c
3  *
4  * $Id: hfc_usb.c,v 4.34 2005/01/26 17:25:53 martinb1 Exp $
5  *
6  * modular HiSax ISDN driver for Colognechip HFC-S USB chip
7  *
8  * Authors : Peter Sprenger  (sprenger@moving-bytes.de)
9  *           Martin Bachem   (info@colognechip.com)
10  *
11  *           based on the first hfc_usb driver of
12  *           Werner Cornelius (werner@isdn-development.de)
13  *
14  * This program is free software; you can redistribute it and/or modify
15  * it under the terms of the GNU General Public License as published by
16  * the Free Software Foundation; either version 2, or (at your option)
17  * any later version.
18  *
19  * This program is distributed in the hope that it will be useful,
20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22  * GNU General Public License for more details.
23  *
24  * You should have received a copy of the GNU General Public License
25  * along with this program; if not, write to the Free Software
26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27  *
28  * See Version Histroy at the bottom of this file
29  *
30 */
31
32 #include <linux/types.h>
33 #include <linux/stddef.h>
34 #include <linux/timer.h>
35 #include <linux/config.h>
36 #include <linux/init.h>
37 #include <linux/module.h>
38 #include <linux/kernel_stat.h>
39 #include <linux/usb.h>
40 #include <linux/kernel.h>
41 #include <linux/smp_lock.h>
42 #include <linux/sched.h>
43 #include "hisax.h"
44 #include "hisax_if.h"
45 #include "hfc_usb.h"
46
47 /*
48 * Version Information
49 * (do not modify the CVS Makros $Revision: 4.34 $ and $Date: 2005/01/26 17:25:53 $ !)
50 */
51 static const char *hfcusb_revision =
52     "Revision: 4.34 $ Date: 2005/01/26 17:25:53 $ ";
53
54 /* Hisax debug support
55 * use "modprobe debug=x" where x is bitfield of USB_DBG & ISDN_DBG
56 */
57 #ifdef CONFIG_HISAX_DEBUG
58 #include <linux/moduleparam.h>
59 #define __debug_variable hfc_debug
60 #include "hisax_debug.h"
61 static u_int debug;
62 module_param(debug, uint, 0);
63 static int hfc_debug;
64 #endif
65
66
67 /****************************************/
68 /* data defining the devices to be used */
69 /****************************************/
70 static struct usb_device_id hfc_usb_idtab[] = {
71         {USB_DEVICE(0x0959, 0x2bd0)},   /* Colognechip USB eval TA */
72         {USB_DEVICE(0x0675, 0x1688)},   /* DrayTek miniVigor 128 USB ISDN TA */
73         {USB_DEVICE(0x07b0, 0x0007)},   /* Billion USB TA 2 */
74         {USB_DEVICE(0x0742, 0x2008)},   /* Stollmann USB TA */
75         {USB_DEVICE(0x0742, 0x2009)},   /* Aceex USB ISDN TA */
76         {USB_DEVICE(0x0742, 0x200A)},   /* OEM USB ISDN TA */
77         {USB_DEVICE(0x08e3, 0x0301)},   /* OliTec ISDN USB */
78         {USB_DEVICE(0x07fa, 0x0846)},   /* Bewan ISDN USB TA */
79         {USB_DEVICE(0x07fa, 0x0847)},   /* Djinn Numeris USB */
80         {USB_DEVICE(0x07b0, 0x0006)},   /* Twister ISDN USB TA */
81         {}                      /* end with an all-zeroes entry */
82 };
83
84 /* driver internal device specific data:
85 *   VendorID, ProductID, Devicename, LED_SCHEME,
86 *   LED's BitMask in HFCUSB_P_DATA Register : LED_USB, LED_S0, LED_B1, LED_B2
87 */
88 static vendor_data vdata[] = {
89         /* CologneChip Eval TA */
90         {0x0959, 0x2bd0, "ISDN USB TA (Cologne Chip HFC-S USB based)",
91          LED_OFF, {4, 0, 2, 1}
92          }
93         ,
94         /* DrayTek miniVigor 128 USB ISDN TA */
95         {0x0675, 0x1688, "DrayTek miniVigor 128 USB ISDN TA",
96          LED_SCHEME1, {1, 2, 0, 0}
97          }
98         ,
99         /* Billion TA */
100         {0x07b0, 0x0007, "Billion tiny USB ISDN TA 128",
101          LED_SCHEME1, {0x80, -64, -32, -16}
102          }
103         ,
104         /* Stollmann TA */
105         {0x0742, 0x2008, "Stollmann USB TA",
106          LED_SCHEME1, {4, 0, 2, 1}
107          }
108         ,
109         /* Aceex USB ISDN TA */
110         {0x0742, 0x2009, "Aceex USB ISDN TA",
111          LED_SCHEME1, {4, 0, 2, 1}
112          }
113         ,
114         /* OEM USB ISDN TA */
115         {0x0742, 0x200A, "OEM USB ISDN TA",
116          LED_SCHEME1, {4, 0, 2, 1}
117          }
118         ,
119         /* Olitec TA  */
120         {0x08e3, 0x0301, "Olitec USB RNIS",
121          LED_SCHEME1, {2, 0, 1, 4}
122          }
123         ,
124         /* Bewan TA   */
125         {0x07fa, 0x0846, "Bewan Modem RNIS USB",
126          LED_SCHEME1, {0x80, -64, -32, -16}
127          }
128         ,
129         /* Bewan TA   */
130         {0x07fa, 0x0847, "Djinn Numeris USB",
131          LED_SCHEME1, {0x80, -64, -32, -16}
132          }
133         ,
134         /* Twister ISDN TA   */
135         {0x07b0, 0x0006, "Twister ISDN TA",
136          LED_SCHEME1, {0x80, -64, -32, -16}
137          }
138         ,
139         {0, 0, 0}               /* EOL element */
140 };
141
142 /***************************************************************/
143 /* structure defining input+output fifos (interrupt/bulk mode) */
144 /***************************************************************/
145 struct usb_fifo;                /* forward definition */
146 typedef struct iso_urb_struct {
147         struct urb *purb;
148         __u8 buffer[ISO_BUFFER_SIZE];   /* buffer incoming/outgoing data */
149         struct usb_fifo *owner_fifo;    /* pointer to owner fifo */
150 } iso_urb_struct;
151
152
153 struct hfcusb_data;             /* forward definition */
154 typedef struct usb_fifo {
155         int fifonum;            /* fifo index attached to this structure */
156         int active;             /* fifo is currently active */
157         struct hfcusb_data *hfc;        /* pointer to main structure */
158         int pipe;               /* address of endpoint */
159         __u8 usb_packet_maxlen; /* maximum length for usb transfer */
160         unsigned int max_size;  /* maximum size of receive/send packet */
161         __u8 intervall;         /* interrupt interval */
162         struct sk_buff *skbuff; /* actual used buffer */
163         struct urb *urb;        /* transfer structure for usb routines */
164         __u8 buffer[128];       /* buffer incoming/outgoing data */
165         int bit_line;           /* how much bits are in the fifo? */
166
167         volatile __u8 usb_transfer_mode;        /* switched between ISO and INT */
168         iso_urb_struct iso[2];  /* need two urbs to have one always for pending */
169         struct hisax_if *hif;   /* hisax interface */
170         int delete_flg;         /* only delete skbuff once */
171         int last_urblen;        /* remember length of last packet */
172
173 } usb_fifo;
174
175 /*********************************************/
176 /* structure holding all data for one device */
177 /*********************************************/
178 typedef struct hfcusb_data {
179         /* HiSax Interface for loadable Layer1 drivers */
180         struct hisax_d_if d_if; /* see hisax_if.h */
181         struct hisax_b_if b_if[2];      /* see hisax_if.h */
182         int protocol;
183
184         struct usb_device *dev; /* our device */
185         int if_used;            /* used interface number */
186         int alt_used;           /* used alternate config */
187         int ctrl_paksize;       /* control pipe packet size */
188         int ctrl_in_pipe, ctrl_out_pipe;        /* handles for control pipe */
189         int cfg_used;           /* configuration index used */
190         int vend_idx;           /* vendor found */
191         int b_mode[2];          /* B-channel mode */
192         int l1_activated;       /* layer 1 activated */
193         int disc_flag;          /* TRUE if device was disonnected to avoid some USB actions */
194         int packet_size, iso_packet_size;
195
196         /* control pipe background handling */
197         ctrl_buft ctrl_buff[HFC_CTRL_BUFSIZE];  /* buffer holding queued data */
198         volatile int ctrl_in_idx, ctrl_out_idx, ctrl_cnt;       /* input/output pointer + count */
199         struct urb *ctrl_urb;   /* transfer structure for control channel */
200
201         struct usb_ctrlrequest ctrl_write;      /* buffer for control write request */
202         struct usb_ctrlrequest ctrl_read;       /* same for read request */
203
204         __u8 old_led_state, led_state, led_new_data, led_b_active;
205
206         volatile __u8 threshold_mask;   /* threshold actually reported */
207         volatile __u8 bch_enables;      /* or mask for sctrl_r and sctrl register values */
208
209         usb_fifo fifos[HFCUSB_NUM_FIFOS];       /* structure holding all fifo data */
210
211         volatile __u8 l1_state; /* actual l1 state */
212         struct timer_list t3_timer;     /* timer 3 for activation/deactivation */
213         struct timer_list t4_timer;     /* timer 4 for activation/deactivation */
214         struct timer_list led_timer;    /* timer flashing leds */
215
216 } hfcusb_data;
217
218
219 static void collect_rx_frame(usb_fifo * fifo, __u8 * data, int len,
220                              int finish);
221
222
223 static inline const char *
224 symbolic(struct hfcusb_symbolic_list list[], const int num)
225 {
226         int i;
227         for (i = 0; list[i].name != NULL; i++)
228                 if (list[i].num == num)
229                         return (list[i].name);
230         return "<unkown>";
231 }
232
233
234 /******************************************************/
235 /* start next background transfer for control channel */
236 /******************************************************/
237 static void
238 ctrl_start_transfer(hfcusb_data * hfc)
239 {
240         if (hfc->ctrl_cnt) {
241                 hfc->ctrl_urb->pipe = hfc->ctrl_out_pipe;
242                 hfc->ctrl_urb->setup_packet = (u_char *) & hfc->ctrl_write;
243                 hfc->ctrl_urb->transfer_buffer = NULL;
244                 hfc->ctrl_urb->transfer_buffer_length = 0;
245                 hfc->ctrl_write.wIndex =
246                     hfc->ctrl_buff[hfc->ctrl_out_idx].hfc_reg;
247                 hfc->ctrl_write.wValue =
248                     hfc->ctrl_buff[hfc->ctrl_out_idx].reg_val;
249
250                 usb_submit_urb(hfc->ctrl_urb, GFP_ATOMIC);      /* start transfer */
251         }
252 }                               /* ctrl_start_transfer */
253
254 /************************************/
255 /* queue a control transfer request */
256 /* return 0 on success.             */
257 /************************************/
258 static int
259 queue_control_request(hfcusb_data * hfc, __u8 reg, __u8 val, int action)
260 {
261         ctrl_buft *buf;
262
263         if (hfc->ctrl_cnt >= HFC_CTRL_BUFSIZE)
264                 return (1);     /* no space left */
265         buf = &hfc->ctrl_buff[hfc->ctrl_in_idx];        /* pointer to new index */
266         buf->hfc_reg = reg;
267         buf->reg_val = val;
268         buf->action = action;
269         if (++hfc->ctrl_in_idx >= HFC_CTRL_BUFSIZE)
270                 hfc->ctrl_in_idx = 0;   /* pointer wrap */
271         if (++hfc->ctrl_cnt == 1)
272                 ctrl_start_transfer(hfc);
273         return (0);
274 }                               /* queue_control_request */
275
276 static int
277 control_action_handler(hfcusb_data * hfc, int reg, int val, int action)
278 {
279         if (!action)
280                 return (1);     /* no action defined */
281         return (0);
282 }
283
284 /***************************************************************/
285 /* control completion routine handling background control cmds */
286 /***************************************************************/
287 static void
288 ctrl_complete(struct urb *urb, struct pt_regs *regs)
289 {
290         hfcusb_data *hfc = (hfcusb_data *) urb->context;
291         ctrl_buft *buf;
292
293         urb->dev = hfc->dev;
294         if (hfc->ctrl_cnt) {
295                 buf = &hfc->ctrl_buff[hfc->ctrl_out_idx];
296                 control_action_handler(hfc, buf->hfc_reg, buf->reg_val,
297                                        buf->action);
298
299                 hfc->ctrl_cnt--;        /* decrement actual count */
300                 if (++hfc->ctrl_out_idx >= HFC_CTRL_BUFSIZE)
301                         hfc->ctrl_out_idx = 0;  /* pointer wrap */
302
303                 ctrl_start_transfer(hfc);       /* start next transfer */
304         }
305 }                               /* ctrl_complete */
306
307 /***************************************************/
308 /* write led data to auxport & invert if necessary */
309 /***************************************************/
310 static void
311 write_led(hfcusb_data * hfc, __u8 led_state)
312 {
313         if (led_state != hfc->old_led_state) {
314                 hfc->old_led_state = led_state;
315                 queue_control_request(hfc, HFCUSB_P_DATA, led_state, 1);
316         }
317 }
318
319 /**************************/
320 /* handle LED bits        */
321 /**************************/
322 static void
323 set_led_bit(hfcusb_data * hfc, signed short led_bits, int unset)
324 {
325         if (unset) {
326                 if (led_bits < 0)
327                         hfc->led_state |= abs(led_bits);
328                 else
329                         hfc->led_state &= ~led_bits;
330         } else {
331                 if (led_bits < 0)
332                         hfc->led_state &= ~abs(led_bits);
333                 else
334                         hfc->led_state |= led_bits;
335         }
336 }
337
338 /******************************************/
339 /* invert B-channel LEDs if data is sent  */
340 /******************************************/
341 static void
342 led_timer(hfcusb_data * hfc)
343 {
344         static int cnt = 0;
345
346         if (cnt) {
347                 if (hfc->led_b_active & 1)
348                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[2],
349                                     0);
350                 if (hfc->led_b_active & 2)
351                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[3],
352                                     0);
353         } else {
354                 if (!(hfc->led_b_active & 1) || hfc->led_new_data & 1)
355                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[2],
356                                     1);
357                 if (!(hfc->led_b_active & 2) || hfc->led_new_data & 2)
358                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[3],
359                                     1);
360         }
361
362         write_led(hfc, hfc->led_state);
363         hfc->led_new_data = 0;
364
365         cnt = !cnt;
366
367         /* restart 4 hz timer */
368         if (!timer_pending(&hfc->led_timer)) {
369                 add_timer(&hfc->led_timer);
370                 hfc->led_timer.expires = jiffies + (LED_TIME * HZ) / 1000;
371         }
372 }
373
374 /**************************/
375 /* handle LED requests    */
376 /**************************/
377 static void
378 handle_led(hfcusb_data * hfc, int event)
379 {
380         /* if no scheme -> no LED action */
381         if (vdata[hfc->vend_idx].led_scheme == LED_OFF)
382                 return;
383
384         switch (event) {
385                 case LED_POWER_ON:
386                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[0],
387                                     0);
388                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[1],
389                                     1);
390                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[2],
391                                     1);
392                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[3],
393                                     1);
394                         break;
395                 case LED_POWER_OFF:     /* no Power off handling */
396                         break;
397                 case LED_S0_ON:
398                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[1],
399                                     0);
400                         break;
401                 case LED_S0_OFF:
402                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[1],
403                                     1);
404                         break;
405                 case LED_B1_ON:
406                         hfc->led_b_active |= 1;
407                         break;
408                 case LED_B1_OFF:
409                         hfc->led_b_active &= ~1;
410                         break;
411                 case LED_B1_DATA:
412                         hfc->led_new_data |= 1;
413                         break;
414                 case LED_B2_ON:
415                         hfc->led_b_active |= 2;
416                         break;
417                 case LED_B2_OFF:
418                         hfc->led_b_active &= ~2;
419                         break;
420                 case LED_B2_DATA:
421                         hfc->led_new_data |= 2;
422                         break;
423         }
424
425         write_led(hfc, hfc->led_state);
426 }
427
428 /********************************/
429 /* called when timer t3 expires */
430 /********************************/
431 static void
432 l1_timer_expire_t3(hfcusb_data * hfc)
433 {
434         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
435                            NULL);
436 #ifdef CONFIG_HISAX_DEBUG
437         DBG(ISDN_DBG,
438             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T3 expire)");
439 #endif
440         hfc->l1_activated = FALSE;
441         handle_led(hfc, LED_S0_OFF);
442         /* deactivate : */
443         queue_control_request(hfc, HFCUSB_STATES, 0x10, 1);
444         queue_control_request(hfc, HFCUSB_STATES, 3, 1);
445 }
446
447 /********************************/
448 /* called when timer t4 expires */
449 /********************************/
450 static void
451 l1_timer_expire_t4(hfcusb_data * hfc)
452 {
453         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
454                            NULL);
455 #ifdef CONFIG_HISAX_DEBUG
456         DBG(ISDN_DBG,
457             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T4 expire)");
458 #endif
459         hfc->l1_activated = FALSE;
460         handle_led(hfc, LED_S0_OFF);
461 }
462
463 /*****************************/
464 /* handle S0 state changes   */
465 /*****************************/
466 static void
467 state_handler(hfcusb_data * hfc, __u8 state)
468 {
469         __u8 old_state;
470
471         old_state = hfc->l1_state;
472         if (state == old_state || state < 1 || state > 8)
473                 return;
474
475 #ifdef CONFIG_HISAX_DEBUG
476         DBG(ISDN_DBG, "HFC-S USB: new S0 state:%d old_state:%d", state,
477             old_state);
478 #endif
479         if (state < 4 || state == 7 || state == 8) {
480                 if (timer_pending(&hfc->t3_timer))
481                         del_timer(&hfc->t3_timer);
482 #ifdef CONFIG_HISAX_DEBUG
483                 DBG(ISDN_DBG, "HFC-S USB: T3 deactivated");
484 #endif
485         }
486         if (state >= 7) {
487                 if (timer_pending(&hfc->t4_timer))
488                         del_timer(&hfc->t4_timer);
489 #ifdef CONFIG_HISAX_DEBUG
490                 DBG(ISDN_DBG, "HFC-S USB: T4 deactivated");
491 #endif
492         }
493
494         if (state == 7 && !hfc->l1_activated) {
495                 hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
496                                    PH_ACTIVATE | INDICATION, NULL);
497 #ifdef CONFIG_HISAX_DEBUG
498                 DBG(ISDN_DBG, "HFC-S USB: PH_ACTIVATE | INDICATION sent");
499 #endif
500                 hfc->l1_activated = TRUE;
501                 handle_led(hfc, LED_S0_ON);
502         } else if (state <= 3 /* && activated */ ) {
503                 if (old_state == 7 || old_state == 8) {
504 #ifdef CONFIG_HISAX_DEBUG
505                         DBG(ISDN_DBG, "HFC-S USB: T4 activated");
506 #endif
507                         if (!timer_pending(&hfc->t4_timer)) {
508                                 hfc->t4_timer.expires =
509                                     jiffies + (HFC_TIMER_T4 * HZ) / 1000;
510                                 add_timer(&hfc->t4_timer);
511                         }
512                 } else {
513                         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
514                                            PH_DEACTIVATE | INDICATION,
515                                            NULL);
516 #ifdef CONFIG_HISAX_DEBUG
517                         DBG(ISDN_DBG,
518                             "HFC-S USB: PH_DEACTIVATE | INDICATION sent");
519 #endif
520                         hfc->l1_activated = FALSE;
521                         handle_led(hfc, LED_S0_OFF);
522                 }
523         }
524         hfc->l1_state = state;
525 }
526
527 /* prepare iso urb */
528 static void
529 fill_isoc_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe,
530               void *buf, int num_packets, int packet_size, int interval,
531               usb_complete_t complete, void *context)
532 {
533         int k;
534
535         spin_lock_init(&urb->lock);
536         urb->dev = dev;
537         urb->pipe = pipe;
538         urb->complete = complete;
539         urb->number_of_packets = num_packets;
540         urb->transfer_buffer_length = packet_size * num_packets;
541         urb->context = context;
542         urb->transfer_buffer = buf;
543         urb->transfer_flags = URB_ISO_ASAP;
544         urb->actual_length = 0;
545         urb->interval = interval;
546         for (k = 0; k < num_packets; k++) {
547                 urb->iso_frame_desc[k].offset = packet_size * k;
548                 urb->iso_frame_desc[k].length = packet_size;
549                 urb->iso_frame_desc[k].actual_length = 0;
550         }
551 }
552
553 /* allocs urbs and start isoc transfer with two pending urbs to avoid
554    gaps in the transfer chain */
555 static int
556 start_isoc_chain(usb_fifo * fifo, int num_packets_per_urb,
557                  usb_complete_t complete, int packet_size)
558 {
559         int i, k, errcode;
560
561         printk(KERN_INFO "HFC-S USB: starting ISO-chain for Fifo %i\n",
562                fifo->fifonum);
563
564         /* allocate Memory for Iso out Urbs */
565         for (i = 0; i < 2; i++) {
566                 if (!(fifo->iso[i].purb)) {
567                         fifo->iso[i].purb =
568                             usb_alloc_urb(num_packets_per_urb, GFP_KERNEL);
569                         if (!(fifo->iso[i].purb)) {
570                                 printk(KERN_INFO
571                                        "alloc urb for fifo %i failed!!!",
572                                        fifo->fifonum);
573                         }
574                         fifo->iso[i].owner_fifo = (struct usb_fifo *) fifo;
575
576                         /* Init the first iso */
577                         if (ISO_BUFFER_SIZE >=
578                             (fifo->usb_packet_maxlen *
579                              num_packets_per_urb)) {
580                                 fill_isoc_urb(fifo->iso[i].purb,
581                                               fifo->hfc->dev, fifo->pipe,
582                                               fifo->iso[i].buffer,
583                                               num_packets_per_urb,
584                                               fifo->usb_packet_maxlen,
585                                               fifo->intervall, complete,
586                                               &fifo->iso[i]);
587                                 memset(fifo->iso[i].buffer, 0,
588                                        sizeof(fifo->iso[i].buffer));
589                                 /* defining packet delimeters in fifo->buffer */
590                                 for (k = 0; k < num_packets_per_urb; k++) {
591                                         fifo->iso[i].purb->
592                                             iso_frame_desc[k].offset =
593                                             k * packet_size;
594                                         fifo->iso[i].purb->
595                                             iso_frame_desc[k].length =
596                                             packet_size;
597                                 }
598                         } else {
599                                 printk(KERN_INFO
600                                        "HFC-S USB: ISO Buffer size to small!\n");
601                         }
602                 }
603                 fifo->bit_line = BITLINE_INF;
604
605                 errcode = usb_submit_urb(fifo->iso[i].purb, GFP_KERNEL);
606                 fifo->active = (errcode >= 0) ? 1 : 0;
607                 if (errcode < 0) {
608                         printk(KERN_INFO "HFC-S USB: %s  URB nr:%d\n",
609                                symbolic(urb_errlist, errcode), i);
610                 };
611         }
612         return (fifo->active);
613 }
614
615 /* stops running iso chain and frees their pending urbs */
616 static void
617 stop_isoc_chain(usb_fifo * fifo)
618 {
619         int i;
620
621         for (i = 0; i < 2; i++) {
622                 if (fifo->iso[i].purb) {
623 #ifdef CONFIG_HISAX_DEBUG
624                         DBG(USB_DBG,
625                             "HFC-S USB: Stopping iso chain for fifo %i.%i",
626                             fifo->fifonum, i);
627 #endif
628                         usb_unlink_urb(fifo->iso[i].purb);
629                         usb_free_urb(fifo->iso[i].purb);
630                         fifo->iso[i].purb = NULL;
631                 }
632         }
633         if (fifo->urb) {
634                 usb_unlink_urb(fifo->urb);
635                 usb_free_urb(fifo->urb);
636                 fifo->urb = NULL;
637         }
638         fifo->active = 0;
639 }
640
641 /* defines how much ISO packets are handled in one URB */
642 static int iso_packets[8] =
643     { ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B,
644         ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D
645 };
646
647 /*****************************************************/
648 /* transmit completion routine for all ISO tx fifos */
649 /*****************************************************/
650 static void
651 tx_iso_complete(struct urb *urb, struct pt_regs *regs)
652 {
653         iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
654         usb_fifo *fifo = context_iso_urb->owner_fifo;
655         hfcusb_data *hfc = fifo->hfc;
656         int k, tx_offset, num_isoc_packets, sink, len, current_len,
657             errcode;
658         int frame_complete, transp_mode, fifon, status;
659         __u8 threshbit;
660         __u8 threshtable[8] = { 1, 2, 4, 8, 0x10, 0x20, 0x40, 0x80 };
661
662         fifon = fifo->fifonum;
663         status = urb->status;
664
665         tx_offset = 0;
666
667         if (fifo->active && !status) {
668                 transp_mode = 0;
669                 if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
670                         transp_mode = TRUE;
671
672                 /* is FifoFull-threshold set for our channel? */
673                 threshbit = threshtable[fifon] & hfc->threshold_mask;
674                 num_isoc_packets = iso_packets[fifon];
675
676                 /* predict dataflow to avoid fifo overflow */
677                 if (fifon >= HFCUSB_D_TX) {
678                         sink = (threshbit) ? SINK_DMIN : SINK_DMAX;
679                 } else {
680                         sink = (threshbit) ? SINK_MIN : SINK_MAX;
681                 }
682                 fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
683                               context_iso_urb->buffer, num_isoc_packets,
684                               fifo->usb_packet_maxlen, fifo->intervall,
685                               tx_iso_complete, urb->context);
686                 memset(context_iso_urb->buffer, 0,
687                        sizeof(context_iso_urb->buffer));
688                 frame_complete = FALSE;
689                 /* Generate next Iso Packets */
690                 for (k = 0; k < num_isoc_packets; ++k) {
691                         if (fifo->skbuff) {
692                                 len = fifo->skbuff->len;
693                                 /* we lower data margin every msec */
694                                 fifo->bit_line -= sink;
695                                 current_len = (0 - fifo->bit_line) / 8;
696                                 /* maximum 15 byte for every ISO packet makes our life easier */
697                                 if (current_len > 14)
698                                         current_len = 14;
699                                 current_len =
700                                     (len <=
701                                      current_len) ? len : current_len;
702                                 /* how much bit do we put on the line? */
703                                 fifo->bit_line += current_len * 8;
704
705                                 context_iso_urb->buffer[tx_offset] = 0;
706                                 if (current_len == len) {
707                                         if (!transp_mode) {
708                                                 /* here frame completion */
709                                                 context_iso_urb->
710                                                     buffer[tx_offset] = 1;
711                                                 /* add 2 byte flags and 16bit CRC at end of ISDN frame */
712                                                 fifo->bit_line += 32;
713                                         }
714                                         frame_complete = TRUE;
715                                 }
716
717                                 memcpy(context_iso_urb->buffer +
718                                        tx_offset + 1, fifo->skbuff->data,
719                                        current_len);
720                                 skb_pull(fifo->skbuff, current_len);
721
722                                 /* define packet delimeters within the URB buffer */
723                                 urb->iso_frame_desc[k].offset = tx_offset;
724                                 urb->iso_frame_desc[k].length =
725                                     current_len + 1;
726
727                                 tx_offset += (current_len + 1);
728                                 if (!transp_mode) {
729                                         if (fifon == HFCUSB_B1_TX)
730                                                 handle_led(hfc,
731                                                            LED_B1_DATA);
732                                         if (fifon == HFCUSB_B2_TX)
733                                                 handle_led(hfc,
734                                                            LED_B2_DATA);
735                                 }
736                         } else {
737                                 urb->iso_frame_desc[k].offset =
738                                     tx_offset++;
739
740                                 urb->iso_frame_desc[k].length = 1;
741                                 fifo->bit_line -= sink; /* we lower data margin every msec */
742
743                                 if (fifo->bit_line < BITLINE_INF) {
744                                         fifo->bit_line = BITLINE_INF;
745                                 }
746                         }
747
748                         if (frame_complete) {
749                                 fifo->delete_flg = TRUE;
750                                 fifo->hif->l1l2(fifo->hif,
751                                                 PH_DATA | CONFIRM,
752                                                 (void *) fifo->skbuff->
753                                                 truesize);
754                                 if (fifo->skbuff && fifo->delete_flg) {
755                                         dev_kfree_skb_any(fifo->skbuff);
756                                         fifo->skbuff = NULL;
757                                         fifo->delete_flg = FALSE;
758                                 }
759                                 frame_complete = FALSE;
760                         }
761                 }
762                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
763                 if (errcode < 0) {
764                         printk(KERN_INFO
765                                "HFC-S USB: error submitting ISO URB: %d \n",
766                                errcode);
767                 }
768         } else {
769                 if (status && !hfc->disc_flag) {
770                         printk(KERN_INFO
771                                "HFC-S USB: tx_iso_complete : urb->status %s (%i), fifonum=%d\n",
772                                symbolic(urb_errlist, status), status,
773                                fifon);
774                 }
775         }
776 }                               /* tx_iso_complete */
777
778 /*****************************************************/
779 /* receive completion routine for all ISO tx fifos   */
780 /*****************************************************/
781 static void
782 rx_iso_complete(struct urb *urb, struct pt_regs *regs)
783 {
784         iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
785         usb_fifo *fifo = context_iso_urb->owner_fifo;
786         hfcusb_data *hfc = fifo->hfc;
787         int k, len, errcode, offset, num_isoc_packets, fifon, maxlen,
788             status;
789         unsigned int iso_status;
790         __u8 *buf;
791         static __u8 eof[8];
792 #ifdef CONFIG_HISAX_DEBUG
793         __u8 i;
794 #endif
795
796         fifon = fifo->fifonum;
797         status = urb->status;
798
799         if (urb->status == -EOVERFLOW) {
800 #ifdef CONFIG_HISAX_DEBUG
801                 DBG(USB_DBG,
802                     "HFC-USB: ignoring USB DATAOVERRUN  for fifo  %i \n",
803                     fifon);
804 #endif
805                 status = 0;
806         }
807         if (fifo->active && !status) {
808                 num_isoc_packets = iso_packets[fifon];
809                 maxlen = fifo->usb_packet_maxlen;
810                 for (k = 0; k < num_isoc_packets; ++k) {
811                         len = urb->iso_frame_desc[k].actual_length;
812                         offset = urb->iso_frame_desc[k].offset;
813                         buf = context_iso_urb->buffer + offset;
814                         iso_status = urb->iso_frame_desc[k].status;
815 #ifdef CONFIG_HISAX_DEBUG
816                         if (iso_status && !hfc->disc_flag)
817                                 DBG(USB_DBG,
818                                     "HFC-S USB: ISO packet failure - status:%x",
819                                     iso_status);
820
821                         if ((fifon == 5) && (debug > 1)) {
822                                 printk(KERN_INFO
823                                        "HFC-S USB: ISO-D-RX lst_urblen:%2d "
824                                        "act_urblen:%2d max-urblen:%2d "
825                                        "EOF:0x%0x DATA: ",
826                                        fifo->last_urblen, len, maxlen,
827                                        eof[5]);
828                                 for (i = 0; i < len; i++)
829                                         printk("%.2x ", buf[i]);
830                                 printk("\n");
831                         }
832 #endif
833                         if (fifo->last_urblen != maxlen) {
834                                 /* the threshold mask is in the 2nd status byte */
835                                 hfc->threshold_mask = buf[1];
836                                 /* care for L1 state only for D-Channel
837                                    to avoid overlapped iso completions */
838                                 if (fifon == 5) {
839                                         /* the S0 state is in the upper half
840                                            of the 1st status byte */
841                                         state_handler(hfc, buf[0] >> 4);
842                                 }
843                                 eof[fifon] = buf[0] & 1;
844                                 if (len > 2)
845                                         collect_rx_frame(fifo, buf + 2,
846                                                          len - 2,
847                                                          (len <
848                                                           maxlen) ?
849                                                          eof[fifon] : 0);
850                         } else {
851                                 collect_rx_frame(fifo, buf, len,
852                                                  (len <
853                                                   maxlen) ? eof[fifon] :
854                                                  0);
855                         }
856                         fifo->last_urblen = len;
857                 }
858
859                 fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
860                               context_iso_urb->buffer, num_isoc_packets,
861                               fifo->usb_packet_maxlen, fifo->intervall,
862                               rx_iso_complete, urb->context);
863                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
864                 if (errcode < 0) {
865                         printk(KERN_INFO
866                                "HFC-S USB: error submitting ISO URB: %d \n",
867                                errcode);
868                 }
869         } else {
870                 if (status && !hfc->disc_flag) {
871                         printk(KERN_INFO
872                                "HFC-S USB: rx_iso_complete : "
873                                "urb->status %d, fifonum %d\n",
874                                status, fifon);
875                 }
876         }
877 }                               /* rx_iso_complete */
878
879 /*****************************************************/
880 /* collect data from interrupt or isochron in        */
881 /*****************************************************/
882 static void
883 collect_rx_frame(usb_fifo * fifo, __u8 * data, int len, int finish)
884 {
885         hfcusb_data *hfc = fifo->hfc;
886         int transp_mode, fifon;
887 #ifdef CONFIG_HISAX_DEBUG
888         int i;
889 #endif
890         fifon = fifo->fifonum;
891         transp_mode = 0;
892         if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
893                 transp_mode = TRUE;
894
895         if (!fifo->skbuff) {
896                 fifo->skbuff = dev_alloc_skb(fifo->max_size + 3);
897                 if (!fifo->skbuff) {
898                         printk(KERN_INFO
899                                "HFC-S USB: cannot allocate buffer (dev_alloc_skb) fifo:%d\n",
900                                fifon);
901                         return;
902                 }
903         }
904         if (len) {
905                 if (fifo->skbuff->len + len < fifo->max_size) {
906                         memcpy(skb_put(fifo->skbuff, len), data, len);
907                 } else {
908 #ifdef CONFIG_HISAX_DEBUG
909                         printk(KERN_INFO "HFC-S USB: ");
910                         for (i = 0; i < 15; i++)
911                                 printk("%.2x ",
912                                        fifo->skbuff->data[fifo->skbuff->
913                                                           len - 15 + i]);
914                         printk("\n");
915 #endif
916                         printk(KERN_INFO
917                                "HCF-USB: got frame exceeded fifo->max_size:%d on fifo:%d\n",
918                                fifo->max_size, fifon);
919                 }
920         }
921         if (transp_mode && fifo->skbuff->len >= 128) {
922                 fifo->hif->l1l2(fifo->hif, PH_DATA | INDICATION,
923                                 fifo->skbuff);
924                 fifo->skbuff = NULL;
925                 return;
926         }
927         /* we have a complete hdlc packet */
928         if (finish) {
929                 if ((!fifo->skbuff->data[fifo->skbuff->len - 1])
930                     && (fifo->skbuff->len > 3)) {
931                         /* remove CRC & status */
932                         skb_trim(fifo->skbuff, fifo->skbuff->len - 3);
933                         if (fifon == HFCUSB_PCM_RX) {
934                                 fifo->hif->l1l2(fifo->hif,
935                                                 PH_DATA_E | INDICATION,
936                                                 fifo->skbuff);
937                         } else
938                                 fifo->hif->l1l2(fifo->hif,
939                                                 PH_DATA | INDICATION,
940                                                 fifo->skbuff);
941                         fifo->skbuff = NULL;    /* buffer was freed from upper layer */
942                 } else {
943                         if (fifo->skbuff->len > 3) {
944                                 printk(KERN_INFO
945                                        "HFC-S USB: got frame %d bytes but CRC ERROR on fifo:%d!!!\n",
946                                        fifo->skbuff->len, fifon);
947 #ifdef CONFIG_HISAX_DEBUG
948                                 if (debug > 1) {
949                                         printk(KERN_INFO "HFC-S USB: ");
950                                         for (i = 0; i < 15; i++)
951                                                 printk("%.2x ",
952                                                        fifo->skbuff->
953                                                        data[fifo->skbuff->
954                                                             len - 15 + i]);
955                                         printk("\n");
956                                 }
957 #endif
958                         }
959 #ifdef CONFIG_HISAX_DEBUG
960                         else {
961                                 printk(KERN_INFO
962                                        "HFC-S USB: frame to small (%d bytes)!!!\n",
963                                        fifo->skbuff->len);
964                         }
965 #endif
966                         skb_trim(fifo->skbuff, 0);
967                 }
968         }
969
970         /* LED flashing only in HDLC mode */
971         if (!transp_mode) {
972                 if (fifon == HFCUSB_B1_RX)
973                         handle_led(hfc, LED_B1_DATA);
974                 if (fifon == HFCUSB_B2_RX)
975                         handle_led(hfc, LED_B2_DATA);
976         }
977 }
978
979 /***********************************************/
980 /* receive completion routine for all rx fifos */
981 /***********************************************/
982 static void
983 rx_complete(struct urb *urb, struct pt_regs *regs)
984 {
985         int len;
986         int status;
987         __u8 *buf, maxlen, fifon;
988         usb_fifo *fifo = (usb_fifo *) urb->context;
989         hfcusb_data *hfc = fifo->hfc;
990         static __u8 eof[8];
991 #ifdef CONFIG_HISAX_DEBUG
992         __u8 i;
993 #endif
994
995         urb->dev = hfc->dev;    /* security init */
996
997         fifon = fifo->fifonum;
998         if ((!fifo->active) || (urb->status)) {
999 #ifdef CONFIG_HISAX_DEBUG
1000                 DBG(USB_DBG, "HFC-S USB: RX-Fifo %i is going down (%i)",
1001                     fifon, urb->status);
1002 #endif
1003                 fifo->urb->interval = 0;        /* cancel automatic rescheduling */
1004                 if (fifo->skbuff) {
1005                         dev_kfree_skb_any(fifo->skbuff);
1006                         fifo->skbuff = NULL;
1007                 }
1008                 return;
1009         }
1010         len = urb->actual_length;
1011         buf = fifo->buffer;
1012         maxlen = fifo->usb_packet_maxlen;
1013
1014 #ifdef CONFIG_HISAX_DEBUG
1015         if ((fifon == 5) && (debug > 1)) {
1016                 printk(KERN_INFO
1017                        "HFC-S USB: INT-D-RX lst_urblen:%2d act_urblen:%2d max-urblen:%2d EOF:0x%0x DATA: ",
1018                        fifo->last_urblen, len, maxlen, eof[5]);
1019                 for (i = 0; i < len; i++)
1020                         printk("%.2x ", buf[i]);
1021                 printk("\n");
1022         }
1023 #endif
1024
1025         if (fifo->last_urblen != fifo->usb_packet_maxlen) {
1026                 /* the threshold mask is in the 2nd status byte */
1027                 hfc->threshold_mask = buf[1];
1028                 /* the S0 state is in the upper half of the 1st status byte */
1029                 state_handler(hfc, buf[0] >> 4);
1030                 eof[fifon] = buf[0] & 1;
1031                 /* if we have more than the 2 status bytes -> collect data */
1032                 if (len > 2)
1033                         collect_rx_frame(fifo, buf + 2,
1034                                          urb->actual_length - 2,
1035                                          (len < maxlen) ? eof[fifon] : 0);
1036         } else {
1037                 collect_rx_frame(fifo, buf, urb->actual_length,
1038                                  (len < maxlen) ? eof[fifon] : 0);
1039         }
1040         fifo->last_urblen = urb->actual_length;
1041         status = usb_submit_urb(urb, GFP_ATOMIC);
1042         if (status) {
1043                 printk(KERN_INFO
1044                        "HFC-S USB: error resubmitting URN at rx_complete...\n");
1045         }
1046 }                               /* rx_complete */
1047
1048 /***************************************************/
1049 /* start the interrupt transfer for the given fifo */
1050 /***************************************************/
1051 static void
1052 start_int_fifo(usb_fifo * fifo)
1053 {
1054         int errcode;
1055
1056         printk(KERN_INFO "HFC-S USB: starting intr IN fifo:%d\n",
1057                fifo->fifonum);
1058
1059         if (!fifo->urb) {
1060                 fifo->urb = usb_alloc_urb(0, GFP_KERNEL);
1061                 if (!fifo->urb)
1062                         return;
1063         }
1064         usb_fill_int_urb(fifo->urb, fifo->hfc->dev, fifo->pipe,
1065                          fifo->buffer, fifo->usb_packet_maxlen,
1066                          rx_complete, fifo, fifo->intervall);
1067         fifo->active = 1;       /* must be marked active */
1068         errcode = usb_submit_urb(fifo->urb, GFP_KERNEL);
1069         if (errcode) {
1070                 printk(KERN_INFO
1071                        "HFC-S USB: submit URB error(start_int_info): status:%i\n",
1072                        errcode);
1073                 fifo->active = 0;
1074                 fifo->skbuff = NULL;
1075         }
1076 }                               /* start_int_fifo */
1077
1078 /*****************************/
1079 /* set the B-channel mode    */
1080 /*****************************/
1081 static void
1082 set_hfcmode(hfcusb_data * hfc, int channel, int mode)
1083 {
1084         __u8 val, idx_table[2] = { 0, 2 };
1085
1086         if (hfc->disc_flag) {
1087                 return;
1088         }
1089 #ifdef CONFIG_HISAX_DEBUG
1090         DBG(ISDN_DBG, "HFC-S USB: setting channel %d to mode %d", channel,
1091             mode);
1092 #endif
1093         hfc->b_mode[channel] = mode;
1094
1095         /* setup CON_HDLC */
1096         val = 0;
1097         if (mode != L1_MODE_NULL)
1098                 val = 8;        /* enable fifo? */
1099         if (mode == L1_MODE_TRANS)
1100                 val |= 2;       /* set transparent bit */
1101
1102         /* set FIFO to transmit register */
1103         queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel], 1);
1104         queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
1105         /* reset fifo */
1106         queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
1107         /* set FIFO to receive register */
1108         queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel] + 1, 1);
1109         queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
1110         /* reset fifo */
1111         queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
1112
1113         val = 0x40;
1114         if (hfc->b_mode[0])
1115                 val |= 1;
1116         if (hfc->b_mode[1])
1117                 val |= 2;
1118         queue_control_request(hfc, HFCUSB_SCTRL, val, 1);
1119
1120         val = 0;
1121         if (hfc->b_mode[0])
1122                 val |= 1;
1123         if (hfc->b_mode[1])
1124                 val |= 2;
1125         queue_control_request(hfc, HFCUSB_SCTRL_R, val, 1);
1126
1127         if (mode == L1_MODE_NULL) {
1128                 if (channel)
1129                         handle_led(hfc, LED_B2_OFF);
1130                 else
1131                         handle_led(hfc, LED_B1_OFF);
1132         } else {
1133                 if (channel)
1134                         handle_led(hfc, LED_B2_ON);
1135                 else
1136                         handle_led(hfc, LED_B1_ON);
1137         }
1138 }
1139
1140 static void
1141 hfc_usb_l2l1(struct hisax_if *my_hisax_if, int pr, void *arg)
1142 {
1143         usb_fifo *fifo = my_hisax_if->priv;
1144         hfcusb_data *hfc = fifo->hfc;
1145
1146         switch (pr) {
1147                 case PH_ACTIVATE | REQUEST:
1148                         if (fifo->fifonum == HFCUSB_D_TX) {
1149 #ifdef CONFIG_HISAX_DEBUG
1150                                 DBG(ISDN_DBG,
1151                                     "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_ACTIVATE | REQUEST");
1152 #endif
1153                                 if (hfc->l1_state != 3
1154                                     && hfc->l1_state != 7) {
1155                                         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
1156                                                            PH_DEACTIVATE |
1157                                                            INDICATION,
1158                                                            NULL);
1159 #ifdef CONFIG_HISAX_DEBUG
1160                                         DBG(ISDN_DBG,
1161                                             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (not state 3 or 7)");
1162 #endif
1163                                 } else {
1164                                         if (hfc->l1_state == 7) {       /* l1 already active */
1165                                                 hfc->d_if.ifc.l1l2(&hfc->
1166                                                                    d_if.
1167                                                                    ifc,
1168                                                                    PH_ACTIVATE
1169                                                                    |
1170                                                                    INDICATION,
1171                                                                    NULL);
1172 #ifdef CONFIG_HISAX_DEBUG
1173                                                 DBG(ISDN_DBG,
1174                                                     "HFC-S USB: PH_ACTIVATE | INDICATION sent again ;)");
1175 #endif
1176                                         } else {
1177                                                 /* force sending sending INFO1 */
1178                                                 queue_control_request(hfc,
1179                                                                       HFCUSB_STATES,
1180                                                                       0x14,
1181                                                                       1);
1182                                                 mdelay(1);
1183                                                 /* start l1 activation */
1184                                                 queue_control_request(hfc,
1185                                                                       HFCUSB_STATES,
1186                                                                       0x04,
1187                                                                       1);
1188                                                 if (!timer_pending
1189                                                     (&hfc->t3_timer)) {
1190                                                         hfc->t3_timer.
1191                                                             expires =
1192                                                             jiffies +
1193                                                             (HFC_TIMER_T3 *
1194                                                              HZ) / 1000;
1195                                                         add_timer(&hfc->
1196                                                                   t3_timer);
1197                                                 }
1198                                         }
1199                                 }
1200                         } else {
1201 #ifdef CONFIG_HISAX_DEBUG
1202                                 DBG(ISDN_DBG,
1203                                     "HFC_USB: hfc_usb_d_l2l1 Bx-chan: PH_ACTIVATE | REQUEST");
1204 #endif
1205                                 set_hfcmode(hfc,
1206                                             (fifo->fifonum ==
1207                                              HFCUSB_B1_TX) ? 0 : 1,
1208                                             (int) arg);
1209                                 fifo->hif->l1l2(fifo->hif,
1210                                                 PH_ACTIVATE | INDICATION,
1211                                                 NULL);
1212                         }
1213                         break;
1214                 case PH_DEACTIVATE | REQUEST:
1215                         if (fifo->fifonum == HFCUSB_D_TX) {
1216 #ifdef CONFIG_HISAX_DEBUG
1217                                 DBG(ISDN_DBG,
1218                                     "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_DEACTIVATE | REQUEST");
1219 #endif
1220                                 printk(KERN_INFO
1221                                        "HFC-S USB: ISDN TE device should not deativate...\n");
1222                         } else {
1223 #ifdef CONFIG_HISAX_DEBUG
1224                                 DBG(ISDN_DBG,
1225                                     "HFC_USB: hfc_usb_d_l2l1 Bx-chan: PH_DEACTIVATE | REQUEST");
1226 #endif
1227                                 set_hfcmode(hfc,
1228                                             (fifo->fifonum ==
1229                                              HFCUSB_B1_TX) ? 0 : 1,
1230                                             (int) L1_MODE_NULL);
1231                                 fifo->hif->l1l2(fifo->hif,
1232                                                 PH_DEACTIVATE | INDICATION,
1233                                                 NULL);
1234                         }
1235                         break;
1236                 case PH_DATA | REQUEST:
1237                         if (fifo->skbuff && fifo->delete_flg) {
1238                                 dev_kfree_skb_any(fifo->skbuff);
1239                                 fifo->skbuff = NULL;
1240                                 fifo->delete_flg = FALSE;
1241                         }
1242                         fifo->skbuff = arg;     /* we have a new buffer */
1243                         break;
1244                 default:
1245                         printk(KERN_INFO
1246                                "HFC_USB: hfc_usb_d_l2l1: unkown state : %#x\n",
1247                                pr);
1248                         break;
1249         }
1250 }
1251
1252 /***************************************************************************/
1253 /* usb_init is called once when a new matching device is detected to setup */
1254 /* main parameters. It registers the driver at the main hisax module.      */
1255 /* on success 0 is returned.                                               */
1256 /***************************************************************************/
1257 static int
1258 usb_init(hfcusb_data * hfc)
1259 {
1260         usb_fifo *fifo;
1261         int i, err;
1262         u_char b;
1263         struct hisax_b_if *p_b_if[2];
1264
1265         /* check the chip id */
1266         if (read_usb(hfc, HFCUSB_CHIP_ID, &b) != 1) {
1267                 printk(KERN_INFO "HFC-USB: cannot read chip id\n");
1268                 return (1);
1269         }
1270         if (b != HFCUSB_CHIPID) {
1271                 printk(KERN_INFO "HFC-S USB: Invalid chip id 0x%02x\n", b);
1272                 return (1);
1273         }
1274
1275         /* first set the needed config, interface and alternate */
1276         err = usb_set_interface(hfc->dev, hfc->if_used, hfc->alt_used);
1277
1278         /* do Chip reset */
1279         write_usb(hfc, HFCUSB_CIRM, 8);
1280         /* aux = output, reset off */
1281         write_usb(hfc, HFCUSB_CIRM, 0x10);
1282
1283         /* set USB_SIZE to match the the wMaxPacketSize for INT or BULK transfers */
1284         write_usb(hfc, HFCUSB_USB_SIZE,
1285                   (hfc->packet_size / 8) | ((hfc->packet_size / 8) << 4));
1286
1287         /* set USB_SIZE_I to match the the wMaxPacketSize for ISO transfers */
1288         write_usb(hfc, HFCUSB_USB_SIZE_I, hfc->iso_packet_size);
1289
1290         /* enable PCM/GCI master mode */
1291         write_usb(hfc, HFCUSB_MST_MODE1, 0);    /* set default values */
1292         write_usb(hfc, HFCUSB_MST_MODE0, 1);    /* enable master mode */
1293
1294         /* init the fifos */
1295         write_usb(hfc, HFCUSB_F_THRES,
1296                   (HFCUSB_TX_THRESHOLD /
1297                    8) | ((HFCUSB_RX_THRESHOLD / 8) << 4));
1298
1299         fifo = hfc->fifos;
1300         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1301                 write_usb(hfc, HFCUSB_FIFO, i); /* select the desired fifo */
1302                 fifo[i].skbuff = NULL;  /* init buffer pointer */
1303                 fifo[i].max_size =
1304                     (i <= HFCUSB_B2_RX) ? MAX_BCH_SIZE : MAX_DFRAME_LEN;
1305                 fifo[i].last_urblen = 0;
1306                 /* set 2 bit for D- & E-channel */
1307                 write_usb(hfc, HFCUSB_HDLC_PAR,
1308                           ((i <= HFCUSB_B2_RX) ? 0 : 2));
1309                 /* rx hdlc, enable IFF for D-channel */
1310                 write_usb(hfc, HFCUSB_CON_HDLC,
1311                           ((i == HFCUSB_D_TX) ? 0x09 : 0x08));
1312                 write_usb(hfc, HFCUSB_INC_RES_F, 2);    /* reset the fifo */
1313         }
1314
1315         write_usb(hfc, HFCUSB_CLKDEL, 0x0f);    /* clock delay value */
1316         write_usb(hfc, HFCUSB_STATES, 3 | 0x10);        /* set deactivated mode */
1317         write_usb(hfc, HFCUSB_STATES, 3);       /* enable state machine */
1318
1319         write_usb(hfc, HFCUSB_SCTRL_R, 0);      /* disable both B receivers */
1320         write_usb(hfc, HFCUSB_SCTRL, 0x40);     /* disable B transmitters + capacitive mode */
1321
1322         /* set both B-channel to not connected */
1323         hfc->b_mode[0] = L1_MODE_NULL;
1324         hfc->b_mode[1] = L1_MODE_NULL;
1325
1326         hfc->l1_activated = FALSE;
1327         hfc->disc_flag = FALSE;
1328         hfc->led_state = 0;
1329         hfc->led_new_data = 0;
1330         hfc->old_led_state = 0;
1331
1332         /* init the t3 timer */
1333         init_timer(&hfc->t3_timer);
1334         hfc->t3_timer.data = (long) hfc;
1335         hfc->t3_timer.function = (void *) l1_timer_expire_t3;
1336
1337         /* init the t4 timer */
1338         init_timer(&hfc->t4_timer);
1339         hfc->t4_timer.data = (long) hfc;
1340         hfc->t4_timer.function = (void *) l1_timer_expire_t4;
1341
1342         /* init the led timer */
1343         init_timer(&hfc->led_timer);
1344         hfc->led_timer.data = (long) hfc;
1345         hfc->led_timer.function = (void *) led_timer;
1346
1347         /* trigger 4 hz led timer */
1348         if (!timer_pending(&hfc->led_timer)) {
1349                 hfc->led_timer.expires = jiffies + (LED_TIME * HZ) / 1000;
1350                 add_timer(&hfc->led_timer);
1351         }
1352
1353         /* init the background machinery for control requests */
1354         hfc->ctrl_read.bRequestType = 0xc0;
1355         hfc->ctrl_read.bRequest = 1;
1356         hfc->ctrl_read.wLength = 1;
1357         hfc->ctrl_write.bRequestType = 0x40;
1358         hfc->ctrl_write.bRequest = 0;
1359         hfc->ctrl_write.wLength = 0;
1360         usb_fill_control_urb(hfc->ctrl_urb,
1361                              hfc->dev,
1362                              hfc->ctrl_out_pipe,
1363                              (u_char *) & hfc->ctrl_write,
1364                              NULL, 0, ctrl_complete, hfc);
1365         /* Init All Fifos */
1366         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1367                 hfc->fifos[i].iso[0].purb = NULL;
1368                 hfc->fifos[i].iso[1].purb = NULL;
1369                 hfc->fifos[i].active = 0;
1370         }
1371         /* register Modul to upper Hisax Layers */
1372         hfc->d_if.owner = THIS_MODULE;
1373         hfc->d_if.ifc.priv = &hfc->fifos[HFCUSB_D_TX];
1374         hfc->d_if.ifc.l2l1 = hfc_usb_l2l1;
1375         for (i = 0; i < 2; i++) {
1376                 hfc->b_if[i].ifc.priv = &hfc->fifos[HFCUSB_B1_TX + i * 2];
1377                 hfc->b_if[i].ifc.l2l1 = hfc_usb_l2l1;
1378                 p_b_if[i] = &hfc->b_if[i];
1379         }
1380         /* default Prot: EURO ISDN, should be a module_param */
1381         hfc->protocol = 2;
1382         hisax_register(&hfc->d_if, p_b_if, "hfc_usb", hfc->protocol);
1383
1384 #ifdef CONFIG_HISAX_DEBUG
1385         hfc_debug = debug;
1386 #endif
1387
1388         for (i = 0; i < 4; i++)
1389                 hfc->fifos[i].hif = &p_b_if[i / 2]->ifc;
1390         for (i = 4; i < 8; i++)
1391                 hfc->fifos[i].hif = &hfc->d_if.ifc;
1392
1393         /* 3 (+1) INT IN + 3 ISO OUT */
1394         if (hfc->cfg_used == CNF_3INT3ISO || hfc->cfg_used == CNF_4INT3ISO) {
1395                 start_int_fifo(hfc->fifos + HFCUSB_D_RX);
1396                 if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1397                         start_int_fifo(hfc->fifos + HFCUSB_PCM_RX);
1398                 start_int_fifo(hfc->fifos + HFCUSB_B1_RX);
1399                 start_int_fifo(hfc->fifos + HFCUSB_B2_RX);
1400         }
1401         /* 3 (+1) ISO IN + 3 ISO OUT */
1402         if (hfc->cfg_used == CNF_3ISO3ISO || hfc->cfg_used == CNF_4ISO3ISO) {
1403                 start_isoc_chain(hfc->fifos + HFCUSB_D_RX, ISOC_PACKETS_D,
1404                                  rx_iso_complete, 16);
1405                 if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1406                         start_isoc_chain(hfc->fifos + HFCUSB_PCM_RX,
1407                                          ISOC_PACKETS_D, rx_iso_complete,
1408                                          16);
1409                 start_isoc_chain(hfc->fifos + HFCUSB_B1_RX, ISOC_PACKETS_B,
1410                                  rx_iso_complete, 16);
1411                 start_isoc_chain(hfc->fifos + HFCUSB_B2_RX, ISOC_PACKETS_B,
1412                                  rx_iso_complete, 16);
1413         }
1414
1415         start_isoc_chain(hfc->fifos + HFCUSB_D_TX, ISOC_PACKETS_D,
1416                          tx_iso_complete, 1);
1417         start_isoc_chain(hfc->fifos + HFCUSB_B1_TX, ISOC_PACKETS_B,
1418                          tx_iso_complete, 1);
1419         start_isoc_chain(hfc->fifos + HFCUSB_B2_TX, ISOC_PACKETS_B,
1420                          tx_iso_complete, 1);
1421
1422         handle_led(hfc, LED_POWER_ON);
1423
1424         return (0);
1425 }                               /* usb_init */
1426
1427 /*************************************************/
1428 /* function called to probe a new plugged device */
1429 /*************************************************/
1430 static int
1431 hfc_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1432 {
1433         struct usb_device *dev = interface_to_usbdev(intf);
1434         hfcusb_data *context;
1435         struct usb_host_interface *iface = intf->cur_altsetting;
1436         struct usb_host_interface *iface_used = NULL;
1437         struct usb_host_endpoint *ep;
1438         int ifnum = iface->desc.bInterfaceNumber;
1439         int i, idx, alt_idx, probe_alt_setting, vend_idx, cfg_used, *vcf,
1440             attr, cfg_found, cidx, ep_addr;
1441         int cmptbl[16], small_match, iso_packet_size, packet_size,
1442             alt_used = 0;
1443
1444         vend_idx = 0xffff;
1445         for (i = 0; vdata[i].vendor; i++) {
1446                 if (dev->descriptor.idVendor == vdata[i].vendor
1447                     && dev->descriptor.idProduct == vdata[i].prod_id)
1448                         vend_idx = i;
1449         }
1450 #ifdef CONFIG_HISAX_DEBUG
1451         DBG(USB_DBG,
1452             "HFC-USB: probing interface(%d) actalt(%d) minor(%d)\n", ifnum,
1453             iface->desc.bAlternateSetting, intf->minor);
1454 #endif
1455         printk(KERN_INFO
1456                "HFC-S USB: probing interface(%d) actalt(%d) minor(%d)\n",
1457                ifnum, iface->desc.bAlternateSetting, intf->minor);
1458
1459         if (vend_idx != 0xffff) {
1460 #ifdef CONFIG_HISAX_DEBUG
1461                 DBG(USB_DBG, "HFC-S USB: found vendor idx:%d  name:%s",
1462                     vend_idx, vdata[vend_idx].vend_name);
1463 #endif
1464                 /* if vendor and product ID is OK, start probing alternate settings */
1465                 alt_idx = 0;
1466                 small_match = 0xffff;
1467
1468                 /* default settings */
1469                 iso_packet_size = 16;
1470                 packet_size = 64;
1471
1472                 while (alt_idx < intf->num_altsetting) {
1473                         iface = intf->altsetting + alt_idx;
1474                         probe_alt_setting = iface->desc.bAlternateSetting;
1475                         cfg_used = 0;
1476
1477                         /* check for config EOL element */
1478                         while (validconf[cfg_used][0]) {
1479                                 cfg_found = TRUE;
1480                                 vcf = validconf[cfg_used];
1481                                 /* first endpoint descriptor */
1482                                 ep = iface->endpoint;
1483 #ifdef CONFIG_HISAX_DEBUG
1484                                 DBG(USB_DBG,
1485                                     "HFC-S USB: (if=%d alt=%d cfg_used=%d)\n",
1486                                     ifnum, probe_alt_setting, cfg_used);
1487 #endif
1488                                 memcpy(cmptbl, vcf, 16 * sizeof(int));
1489
1490                                 /* check for all endpoints in this alternate setting */
1491                                 for (i = 0; i < iface->desc.bNumEndpoints;
1492                                      i++) {
1493                                         ep_addr =
1494                                             ep->desc.bEndpointAddress;
1495                                         /* get endpoint base */
1496                                         idx = ((ep_addr & 0x7f) - 1) * 2;
1497                                         if (ep_addr & 0x80)
1498                                                 idx++;
1499                                         attr = ep->desc.bmAttributes;
1500                                         if (cmptbl[idx] == EP_NUL) {
1501                                                 cfg_found = FALSE;
1502                                         }
1503                                         if (attr == USB_ENDPOINT_XFER_INT
1504                                             && cmptbl[idx] == EP_INT)
1505                                                 cmptbl[idx] = EP_NUL;
1506                                         if (attr == USB_ENDPOINT_XFER_BULK
1507                                             && cmptbl[idx] == EP_BLK)
1508                                                 cmptbl[idx] = EP_NUL;
1509                                         if (attr == USB_ENDPOINT_XFER_ISOC
1510                                             && cmptbl[idx] == EP_ISO)
1511                                                 cmptbl[idx] = EP_NUL;
1512
1513                                         /* check if all INT endpoints match minimum interval */
1514                                         if (attr == USB_ENDPOINT_XFER_INT
1515                                             && ep->desc.bInterval <
1516                                             vcf[17]) {
1517 #ifdef CONFIG_HISAX_DEBUG
1518                                                 if (cfg_found)
1519                                                         DBG(USB_DBG,
1520                                                             "HFC-S USB: Interrupt Endpoint interval < %d found - skipping config",
1521                                                             vcf[17]);
1522 #endif
1523                                                 cfg_found = FALSE;
1524                                         }
1525                                         ep++;
1526                                 }
1527                                 for (i = 0; i < 16; i++) {
1528                                         /* all entries must be EP_NOP or EP_NUL for a valid config */
1529                                         if (cmptbl[i] != EP_NOP
1530                                             && cmptbl[i] != EP_NUL)
1531                                                 cfg_found = FALSE;
1532                                 }
1533                                 if (cfg_found) {
1534                                         if (cfg_used < small_match) {
1535                                                 small_match = cfg_used;
1536                                                 alt_used =
1537                                                     probe_alt_setting;
1538                                                 iface_used = iface;
1539                                         }
1540 #ifdef CONFIG_HISAX_DEBUG
1541                                         DBG(USB_DBG,
1542                                             "HFC-USB: small_match=%x %x\n",
1543                                             small_match, alt_used);
1544 #endif
1545                                 }
1546                                 cfg_used++;
1547                         }
1548                         alt_idx++;
1549                 }               /* (alt_idx < intf->num_altsetting) */
1550
1551                 /* found a valid USB Ta Endpint config */
1552                 if (small_match != 0xffff) {
1553                         iface = iface_used;
1554                         if (!
1555                             (context =
1556                              kmalloc(sizeof(hfcusb_data), GFP_KERNEL)))
1557                                 return (-ENOMEM);       /* got no mem */
1558                         memset(context, 0, sizeof(hfcusb_data));
1559
1560                         ep = iface->endpoint;
1561                         vcf = validconf[small_match];
1562
1563                         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1564                                 ep_addr = ep->desc.bEndpointAddress;
1565                                 /* get endpoint base */
1566                                 idx = ((ep_addr & 0x7f) - 1) * 2;
1567                                 if (ep_addr & 0x80)
1568                                         idx++;
1569                                 cidx = idx & 7;
1570                                 attr = ep->desc.bmAttributes;
1571
1572                                 /* init Endpoints */
1573                                 if (vcf[idx] != EP_NOP
1574                                     && vcf[idx] != EP_NUL) {
1575                                         switch (attr) {
1576                                                 case USB_ENDPOINT_XFER_INT:
1577                                                         context->
1578                                                             fifos[cidx].
1579                                                             pipe =
1580                                                             usb_rcvintpipe
1581                                                             (dev,
1582                                                              ep->desc.
1583                                                              bEndpointAddress);
1584                                                         context->
1585                                                             fifos[cidx].
1586                                                             usb_transfer_mode
1587                                                             = USB_INT;
1588                                                         packet_size =
1589                                                             ep->desc.
1590                                                             wMaxPacketSize;
1591                                                         break;
1592                                                 case USB_ENDPOINT_XFER_BULK:
1593                                                         if (ep_addr & 0x80)
1594                                                                 context->
1595                                                                     fifos
1596                                                                     [cidx].
1597                                                                     pipe =
1598                                                                     usb_rcvbulkpipe
1599                                                                     (dev,
1600                                                                      ep->
1601                                                                      desc.
1602                                                                      bEndpointAddress);
1603                                                         else
1604                                                                 context->
1605                                                                     fifos
1606                                                                     [cidx].
1607                                                                     pipe =
1608                                                                     usb_sndbulkpipe
1609                                                                     (dev,
1610                                                                      ep->
1611                                                                      desc.
1612                                                                      bEndpointAddress);
1613                                                         context->
1614                                                             fifos[cidx].
1615                                                             usb_transfer_mode
1616                                                             = USB_BULK;
1617                                                         packet_size =
1618                                                             ep->desc.
1619                                                             wMaxPacketSize;
1620                                                         break;
1621                                                 case USB_ENDPOINT_XFER_ISOC:
1622                                                         if (ep_addr & 0x80)
1623                                                                 context->
1624                                                                     fifos
1625                                                                     [cidx].
1626                                                                     pipe =
1627                                                                     usb_rcvisocpipe
1628                                                                     (dev,
1629                                                                      ep->
1630                                                                      desc.
1631                                                                      bEndpointAddress);
1632                                                         else
1633                                                                 context->
1634                                                                     fifos
1635                                                                     [cidx].
1636                                                                     pipe =
1637                                                                     usb_sndisocpipe
1638                                                                     (dev,
1639                                                                      ep->
1640                                                                      desc.
1641                                                                      bEndpointAddress);
1642                                                         context->
1643                                                             fifos[cidx].
1644                                                             usb_transfer_mode
1645                                                             = USB_ISOC;
1646                                                         iso_packet_size =
1647                                                             ep->desc.
1648                                                             wMaxPacketSize;
1649                                                         break;
1650                                                 default:
1651                                                         context->
1652                                                             fifos[cidx].
1653                                                             pipe = 0;
1654                                         }       /* switch attribute */
1655
1656                                         if (context->fifos[cidx].pipe) {
1657                                                 context->fifos[cidx].
1658                                                     fifonum = cidx;
1659                                                 context->fifos[cidx].hfc =
1660                                                     context;
1661                                                 context->fifos[cidx].
1662                                                     usb_packet_maxlen =
1663                                                     ep->desc.
1664                                                     wMaxPacketSize;
1665                                                 context->fifos[cidx].
1666                                                     intervall =
1667                                                     ep->desc.bInterval;
1668                                                 context->fifos[cidx].
1669                                                     skbuff = NULL;
1670                                         }
1671                                 }
1672                                 ep++;
1673                         }
1674                         context->dev = dev;     /* save device */
1675                         context->if_used = ifnum;       /* save used interface */
1676                         context->alt_used = alt_used;   /* and alternate config */
1677                         context->ctrl_paksize = dev->descriptor.bMaxPacketSize0;        /* control size */
1678                         context->cfg_used = vcf[16];    /* store used config */
1679                         context->vend_idx = vend_idx;   /* store found vendor */
1680                         context->packet_size = packet_size;
1681                         context->iso_packet_size = iso_packet_size;
1682
1683                         /* create the control pipes needed for register access */
1684                         context->ctrl_in_pipe =
1685                             usb_rcvctrlpipe(context->dev, 0);
1686                         context->ctrl_out_pipe =
1687                             usb_sndctrlpipe(context->dev, 0);
1688                         context->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
1689
1690                         printk(KERN_INFO
1691                                "HFC-S USB: detected \"%s\"\n",
1692                                vdata[vend_idx].vend_name);
1693 #ifdef CONFIG_HISAX_DEBUG
1694                         DBG(USB_DBG,
1695                             "HFC-S USB: Endpoint-Config: %s (if=%d alt=%d)\n",
1696                             conf_str[small_match], context->if_used,
1697                             context->alt_used);
1698                         printk(KERN_INFO
1699                                "HFC-S USB: E-channel (\"ECHO:\") logging ");
1700                         if (validconf[small_match][18])
1701                                 printk(" possible\n");
1702                         else
1703                                 printk("NOT possible\n");
1704 #endif
1705                         /* init the chip and register the driver */
1706                         if (usb_init(context)) {
1707                                 if (context->ctrl_urb) {
1708                                         usb_unlink_urb(context->ctrl_urb);
1709                                         usb_free_urb(context->ctrl_urb);
1710                                         context->ctrl_urb = NULL;
1711                                 }
1712                                 kfree(context);
1713                                 return (-EIO);
1714                         }
1715                         usb_set_intfdata(intf, context);
1716                         return (0);
1717                 }
1718         } else {
1719                 printk(KERN_INFO
1720                        "HFC-S USB: no valid vendor found in USB descriptor\n");
1721         }
1722         return (-EIO);
1723 }
1724
1725 /****************************************************/
1726 /* function called when an active device is removed */
1727 /****************************************************/
1728 static void
1729 hfc_usb_disconnect(struct usb_interface
1730                    *intf)
1731 {
1732         hfcusb_data *context = usb_get_intfdata(intf);
1733         int i;
1734         printk(KERN_INFO "HFC-S USB: device disconnect\n");
1735         context->disc_flag = TRUE;
1736         usb_set_intfdata(intf, NULL);
1737         if (!context)
1738                 return;
1739         if (timer_pending(&context->t3_timer))
1740                 del_timer(&context->t3_timer);
1741         if (timer_pending(&context->t4_timer))
1742                 del_timer(&context->t4_timer);
1743         if (timer_pending(&context->led_timer))
1744                 del_timer(&context->led_timer);
1745         /* tell all fifos to terminate */
1746         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1747                 if (context->fifos[i].usb_transfer_mode == USB_ISOC) {
1748                         if (context->fifos[i].active > 0) {
1749                                 stop_isoc_chain(&context->fifos[i]);
1750 #ifdef CONFIG_HISAX_DEBUG
1751                                 DBG(USB_DBG,
1752                                     "HFC-S USB: hfc_usb_disconnect: stopping ISOC chain Fifo no %i",
1753                                     i);
1754 #endif
1755                         }
1756                 } else {
1757                         if (context->fifos[i].active > 0) {
1758                                 context->fifos[i].active = 0;
1759 #ifdef CONFIG_HISAX_DEBUG
1760                                 DBG(USB_DBG,
1761                                     "HFC-S USB: hfc_usb_disconnect: unlinking URB for Fifo no %i",
1762                                     i);
1763 #endif
1764                         }
1765                         if (context->fifos[i].urb) {
1766                                 usb_unlink_urb(context->fifos[i].urb);
1767                                 usb_free_urb(context->fifos[i].urb);
1768                                 context->fifos[i].urb = NULL;
1769                         }
1770                 }
1771                 context->fifos[i].active = 0;
1772         }
1773         /* wait for all URBS to terminate */
1774         mdelay(10);
1775         if (context->ctrl_urb) {
1776                 usb_unlink_urb(context->ctrl_urb);
1777                 usb_free_urb(context->ctrl_urb);
1778                 context->ctrl_urb = NULL;
1779         }
1780         hisax_unregister(&context->d_if);
1781         kfree(context);         /* free our structure again */
1782 }                               /* hfc_usb_disconnect */
1783
1784 /************************************/
1785 /* our driver information structure */
1786 /************************************/
1787 static struct usb_driver hfc_drv = {
1788         .owner = THIS_MODULE,.name =
1789             "hfc_usb",.id_table = hfc_usb_idtab,.probe =
1790             hfc_usb_probe,.disconnect = hfc_usb_disconnect,
1791 };
1792 static void __exit
1793 hfc_usb_exit(void)
1794 {
1795 #ifdef CONFIG_HISAX_DEBUG
1796         DBG(USB_DBG, "HFC-S USB: calling \"hfc_usb_exit\" ...");
1797 #endif
1798         usb_deregister(&hfc_drv);       /* release our driver */
1799         printk(KERN_INFO "HFC-S USB: module removed\n");
1800 }
1801
1802 static int __init
1803 hfc_usb_init(void)
1804 {
1805 #ifndef CONFIG_HISAX_DEBUG
1806         unsigned int debug = -1;
1807 #endif
1808         char revstr[30], datestr[30], dummy[30];
1809         sscanf(hfcusb_revision,
1810                "%s %s $ %s %s %s $ ", dummy, revstr,
1811                dummy, datestr, dummy);
1812         printk(KERN_INFO
1813                "HFC-S USB: driver module revision %s date %s loaded, (debug=%i)\n",
1814                revstr, datestr, debug);
1815         if (usb_register(&hfc_drv)) {
1816                 printk(KERN_INFO
1817                        "HFC-S USB: Unable to register HFC-S USB module at usb stack\n");
1818                 return (-1);    /* unable to register */
1819         }
1820         return (0);
1821 }
1822
1823 module_init(hfc_usb_init);
1824 module_exit(hfc_usb_exit);
1825 MODULE_AUTHOR(DRIVER_AUTHOR);
1826 MODULE_DESCRIPTION(DRIVER_DESC);
1827 MODULE_LICENSE("GPL");
1828 MODULE_DEVICE_TABLE(usb, hfc_usb_idtab);