Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/drivers/isdn/hisax/hfc_usb.c

  1 /*
  2  * hfc_usb.c
  3  *
  4  * $Id: hfc_usb.c,v 2.3.2.24 2007/10/14 08:40:29 mbachem 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 (m.bachem@gmx.de, 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/init.h>
 36 #include <linux/module.h>
 37 #include <linux/kernel_stat.h>
 38 #include <linux/usb.h>
 39 #include <linux/kernel.h>
 40 #include <linux/sched.h>
 41 #include <linux/moduleparam.h>
 42 #include <linux/slab.h>
 43 #include "hisax.h"
 44 #include "hisax_if.h"
 45 #include "hfc_usb.h"
 46 
 47 static const char *hfcusb_revision =
 48         "$Revision: 2.3.2.24 $ $Date: 2007/10/14 08:40:29 $ ";
 49 
 50 /* Hisax debug support
 51  *  debug flags defined in hfc_usb.h as HFCUSB_DBG_[*]
 52  */
 53 #define __debug_variable hfc_debug
 54 #include "hisax_debug.h"
 55 static u_int debug;
 56 module_param(debug, uint, 0);
 57 static int hfc_debug;
 58 
 59 
 60 /* private vendor specific data */
 61 typedef struct {
 62         __u8 led_scheme;        // led display scheme
 63         signed short led_bits[8];       // array of 8 possible LED bitmask settings
 64         char *vend_name;        // device name
 65 } hfcsusb_vdata;
 66 
 67 /* VID/PID device list */
 68 static struct usb_device_id hfcusb_idtab[] = {
 69         {
 70                 USB_DEVICE(0x0959, 0x2bd0),
 71                 .driver_info = (unsigned long) &((hfcsusb_vdata)
 72                         {LED_OFF, {4, 0, 2, 1},
 73                                         "ISDN USB TA (Cologne Chip HFC-S USB based)"}),
 74         },
 75         {
 76                 USB_DEVICE(0x0675, 0x1688),
 77                 .driver_info = (unsigned long) &((hfcsusb_vdata)
 78                         {LED_SCHEME1, {1, 2, 0, 0},
 79                                         "DrayTek miniVigor 128 USB ISDN TA"}),
 80         },
 81         {
 82                 USB_DEVICE(0x07b0, 0x0007),
 83                 .driver_info = (unsigned long) &((hfcsusb_vdata)
 84                         {LED_SCHEME1, {0x80, -64, -32, -16},
 85                                         "Billion tiny USB ISDN TA 128"}),
 86         },
 87         {
 88                 USB_DEVICE(0x0742, 0x2008),
 89                 .driver_info = (unsigned long) &((hfcsusb_vdata)
 90                         {LED_SCHEME1, {4, 0, 2, 1},
 91                                         "Stollmann USB TA"}),
 92         },
 93         {
 94                 USB_DEVICE(0x0742, 0x2009),
 95                 .driver_info = (unsigned long) &((hfcsusb_vdata)
 96                         {LED_SCHEME1, {4, 0, 2, 1},
 97                                         "Aceex USB ISDN TA"}),
 98         },
 99         {
100                 USB_DEVICE(0x0742, 0x200A),
101                 .driver_info = (unsigned long) &((hfcsusb_vdata)
102                         {LED_SCHEME1, {4, 0, 2, 1},
103                                         "OEM USB ISDN TA"}),
104         },
105         {
106                 USB_DEVICE(0x08e3, 0x0301),
107                 .driver_info = (unsigned long) &((hfcsusb_vdata)
108                         {LED_SCHEME1, {2, 0, 1, 4},
109                                         "Olitec USB RNIS"}),
110         },
111         {
112                 USB_DEVICE(0x07fa, 0x0846),
113                 .driver_info = (unsigned long) &((hfcsusb_vdata)
114                         {LED_SCHEME1, {0x80, -64, -32, -16},
115                                         "Bewan Modem RNIS USB"}),
116         },
117         {
118                 USB_DEVICE(0x07fa, 0x0847),
119                 .driver_info = (unsigned long) &((hfcsusb_vdata)
120                         {LED_SCHEME1, {0x80, -64, -32, -16},
121                                         "Djinn Numeris USB"}),
122         },
123         {
124                 USB_DEVICE(0x07b0, 0x0006),
125                 .driver_info = (unsigned long) &((hfcsusb_vdata)
126                         {LED_SCHEME1, {0x80, -64, -32, -16},
127                                         "Twister ISDN TA"}),
128         },
129         {
130                 USB_DEVICE(0x071d, 0x1005),
131                 .driver_info = (unsigned long) &((hfcsusb_vdata)
132                         {LED_SCHEME1, {0x02, 0, 0x01, 0x04},
133                                         "Eicon DIVA USB 4.0"}),
134         },
135         { }
136 };
137 
138 /* structure defining input+output fifos (interrupt/bulk mode) */
139 struct usb_fifo;                /* forward definition */
140 typedef struct iso_urb_struct {
141         struct urb *purb;
142         __u8 buffer[ISO_BUFFER_SIZE];   /* buffer incoming/outgoing data */
143         struct usb_fifo *owner_fifo;    /* pointer to owner fifo */
144 } iso_urb_struct;
145 
146 struct hfcusb_data;             /* forward definition */
147 
148 typedef struct usb_fifo {
149         int fifonum;            /* fifo index attached to this structure */
150         int active;             /* fifo is currently active */
151         struct hfcusb_data *hfc;        /* pointer to main structure */
152         int pipe;               /* address of endpoint */
153         __u8 usb_packet_maxlen; /* maximum length for usb transfer */
154         unsigned int max_size;  /* maximum size of receive/send packet */
155         __u8 intervall;         /* interrupt interval */
156         struct sk_buff *skbuff; /* actual used buffer */
157         struct urb *urb;        /* transfer structure for usb routines */
158         __u8 buffer[128];       /* buffer incoming/outgoing data */
159         int bit_line;           /* how much bits are in the fifo? */
160 
161         volatile __u8 usb_transfer_mode;        /* switched between ISO and INT */
162         iso_urb_struct iso[2];  /* need two urbs to have one always for pending */
163         struct hisax_if *hif;   /* hisax interface */
164         int delete_flg;         /* only delete skbuff once */
165         int last_urblen;        /* remember length of last packet */
166 } usb_fifo;
167 
168 /* structure holding all data for one device */
169 typedef struct hfcusb_data {
170         /* HiSax Interface for loadable Layer1 drivers */
171         struct hisax_d_if d_if;         /* see hisax_if.h */
172         struct hisax_b_if b_if[2];      /* see hisax_if.h */
173         int protocol;
174 
175         struct usb_device *dev; /* our device */
176         int if_used;            /* used interface number */
177         int alt_used;           /* used alternate config */
178         int ctrl_paksize;       /* control pipe packet size */
179         int ctrl_in_pipe,       /* handles for control pipe */
180                 ctrl_out_pipe;
181         int cfg_used;           /* configuration index used */
182         int vend_idx;           /* vendor found */
183         int b_mode[2];          /* B-channel mode */
184         int l1_activated;       /* layer 1 activated */
185         int disc_flag;          /* TRUE if device was disonnected to avoid some USB actions */
186         int packet_size, iso_packet_size;
187 
188         /* control pipe background handling */
189         ctrl_buft ctrl_buff[HFC_CTRL_BUFSIZE];  /* buffer holding queued data */
190         volatile int ctrl_in_idx, ctrl_out_idx, ctrl_cnt;       /* input/output pointer + count */
191         struct urb *ctrl_urb;   /* transfer structure for control channel */
192 
193         struct usb_ctrlrequest ctrl_write;      /* buffer for control write request */
194         struct usb_ctrlrequest ctrl_read;       /* same for read request */
195 
196         __u8 old_led_state, led_state;
197 
198         volatile __u8 threshold_mask;   /* threshold actually reported */
199         volatile __u8 bch_enables;      /* or mask for sctrl_r and sctrl register values */
200 
201         usb_fifo fifos[HFCUSB_NUM_FIFOS];       /* structure holding all fifo data */
202 
203         volatile __u8 l1_state; /* actual l1 state */
204         struct timer_list t3_timer;     /* timer 3 for activation/deactivation */
205         struct timer_list t4_timer;     /* timer 4 for activation/deactivation */
206 } hfcusb_data;
207 
208 
209 static void collect_rx_frame(usb_fifo *fifo, __u8 *data, int len,
210                              int finish);
211 
212 static inline const char *
213 symbolic(struct hfcusb_symbolic_list list[], const int num)
214 {
215         int i;
216         for (i = 0; list[i].name != NULL; i++)
217                 if (list[i].num == num)
218                         return (list[i].name);
219         return "<unknown ERROR>";
220 }
221 
222 static void
223 ctrl_start_transfer(hfcusb_data *hfc)
224 {
225         if (hfc->ctrl_cnt) {
226                 hfc->ctrl_urb->pipe = hfc->ctrl_out_pipe;
227                 hfc->ctrl_urb->setup_packet = (u_char *)&hfc->ctrl_write;
228                 hfc->ctrl_urb->transfer_buffer = NULL;
229                 hfc->ctrl_urb->transfer_buffer_length = 0;
230                 hfc->ctrl_write.wIndex =
231                         cpu_to_le16(hfc->ctrl_buff[hfc->ctrl_out_idx].hfc_reg);
232                 hfc->ctrl_write.wValue =
233                         cpu_to_le16(hfc->ctrl_buff[hfc->ctrl_out_idx].reg_val);
234 
235                 usb_submit_urb(hfc->ctrl_urb, GFP_ATOMIC);      /* start transfer */
236         }
237 }                               /* ctrl_start_transfer */
238 
239 static int
240 queue_control_request(hfcusb_data *hfc, __u8 reg, __u8 val, int action)
241 {
242         ctrl_buft *buf;
243 
244         if (hfc->ctrl_cnt >= HFC_CTRL_BUFSIZE)
245                 return (1);     /* no space left */
246         buf = &hfc->ctrl_buff[hfc->ctrl_in_idx];        /* pointer to new index */
247         buf->hfc_reg = reg;
248         buf->reg_val = val;
249         buf->action = action;
250         if (++hfc->ctrl_in_idx >= HFC_CTRL_BUFSIZE)
251                 hfc->ctrl_in_idx = 0;   /* pointer wrap */
252         if (++hfc->ctrl_cnt == 1)
253                 ctrl_start_transfer(hfc);
254         return (0);
255 }
256 
257 static void
258 ctrl_complete(struct urb *urb)
259 {
260         hfcusb_data *hfc = (hfcusb_data *) urb->context;
261 
262         urb->dev = hfc->dev;
263         if (hfc->ctrl_cnt) {
264                 hfc->ctrl_cnt--;        /* decrement actual count */
265                 if (++hfc->ctrl_out_idx >= HFC_CTRL_BUFSIZE)
266                         hfc->ctrl_out_idx = 0;  /* pointer wrap */
267 
268                 ctrl_start_transfer(hfc);       /* start next transfer */
269         }
270 }
271 
272 /* write led data to auxport & invert if necessary */
273 static void
274 write_led(hfcusb_data *hfc, __u8 led_state)
275 {
276         if (led_state != hfc->old_led_state) {
277                 hfc->old_led_state = led_state;
278                 queue_control_request(hfc, HFCUSB_P_DATA, led_state, 1);
279         }
280 }
281 
282 static void
283 set_led_bit(hfcusb_data *hfc, signed short led_bits, int on)
284 {
285         if (on) {
286                 if (led_bits < 0)
287                         hfc->led_state &= ~abs(led_bits);
288                 else
289                         hfc->led_state |= led_bits;
290         } else {
291                 if (led_bits < 0)
292                         hfc->led_state |= abs(led_bits);
293                 else
294                         hfc->led_state &= ~led_bits;
295         }
296 }
297 
298 /* handle LED requests */
299 static void
300 handle_led(hfcusb_data *hfc, int event)
301 {
302         hfcsusb_vdata *driver_info =
303                 (hfcsusb_vdata *) hfcusb_idtab[hfc->vend_idx].driver_info;
304 
305         /* if no scheme -> no LED action */
306         if (driver_info->led_scheme == LED_OFF)
307                 return;
308 
309         switch (event) {
310         case LED_POWER_ON:
311                 set_led_bit(hfc, driver_info->led_bits[0], 1);
312                 set_led_bit(hfc, driver_info->led_bits[1], 0);
313                 set_led_bit(hfc, driver_info->led_bits[2], 0);
314                 set_led_bit(hfc, driver_info->led_bits[3], 0);
315                 break;
316         case LED_POWER_OFF:
317                 set_led_bit(hfc, driver_info->led_bits[0], 0);
318                 set_led_bit(hfc, driver_info->led_bits[1], 0);
319                 set_led_bit(hfc, driver_info->led_bits[2], 0);
320                 set_led_bit(hfc, driver_info->led_bits[3], 0);
321                 break;
322         case LED_S0_ON:
323                 set_led_bit(hfc, driver_info->led_bits[1], 1);
324                 break;
325         case LED_S0_OFF:
326                 set_led_bit(hfc, driver_info->led_bits[1], 0);
327                 break;
328         case LED_B1_ON:
329                 set_led_bit(hfc, driver_info->led_bits[2], 1);
330                 break;
331         case LED_B1_OFF:
332                 set_led_bit(hfc, driver_info->led_bits[2], 0);
333                 break;
334         case LED_B2_ON:
335                 set_led_bit(hfc, driver_info->led_bits[3], 1);
336                 break;
337         case LED_B2_OFF:
338                 set_led_bit(hfc, driver_info->led_bits[3], 0);
339                 break;
340         }
341         write_led(hfc, hfc->led_state);
342 }
343 
344 /* ISDN l1 timer T3 expires */
345 static void
346 l1_timer_expire_t3(hfcusb_data *hfc)
347 {
348         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
349                            NULL);
350 
351         DBG(HFCUSB_DBG_STATES,
352             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T3 expire)");
353 
354         hfc->l1_activated = 0;
355         handle_led(hfc, LED_S0_OFF);
356         /* deactivate : */
357         queue_control_request(hfc, HFCUSB_STATES, 0x10, 1);
358         queue_control_request(hfc, HFCUSB_STATES, 3, 1);
359 }
360 
361 /* ISDN l1 timer T4 expires */
362 static void
363 l1_timer_expire_t4(hfcusb_data *hfc)
364 {
365         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
366                            NULL);
367 
368         DBG(HFCUSB_DBG_STATES,
369             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T4 expire)");
370 
371         hfc->l1_activated = 0;
372         handle_led(hfc, LED_S0_OFF);
373 }
374 
375 /* S0 state changed */
376 static void
377 s0_state_handler(hfcusb_data *hfc, __u8 state)
378 {
379         __u8 old_state;
380 
381         old_state = hfc->l1_state;
382         if (state == old_state || state < 1 || state > 8)
383                 return;
384 
385         DBG(HFCUSB_DBG_STATES, "HFC-S USB: S0 statechange(%d -> %d)",
386             old_state, state);
387 
388         if (state < 4 || state == 7 || state == 8) {
389                 if (timer_pending(&hfc->t3_timer))
390                         del_timer(&hfc->t3_timer);
391                 DBG(HFCUSB_DBG_STATES, "HFC-S USB: T3 deactivated");
392         }
393         if (state >= 7) {
394                 if (timer_pending(&hfc->t4_timer))
395                         del_timer(&hfc->t4_timer);
396                 DBG(HFCUSB_DBG_STATES, "HFC-S USB: T4 deactivated");
397         }
398 
399         if (state == 7 && !hfc->l1_activated) {
400                 hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
401                                    PH_ACTIVATE | INDICATION, NULL);
402                 DBG(HFCUSB_DBG_STATES, "HFC-S USB: PH_ACTIVATE | INDICATION sent");
403                 hfc->l1_activated = 1;
404                 handle_led(hfc, LED_S0_ON);
405         } else if (state <= 3 /* && activated */) {
406                 if (old_state == 7 || old_state == 8) {
407                         DBG(HFCUSB_DBG_STATES, "HFC-S USB: T4 activated");
408                         if (!timer_pending(&hfc->t4_timer)) {
409                                 hfc->t4_timer.expires =
410                                         jiffies + (HFC_TIMER_T4 * HZ) / 1000;
411                                 add_timer(&hfc->t4_timer);
412                         }
413                 } else {
414                         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
415                                            PH_DEACTIVATE | INDICATION,
416                                            NULL);
417                         DBG(HFCUSB_DBG_STATES,
418                             "HFC-S USB: PH_DEACTIVATE | INDICATION sent");
419                         hfc->l1_activated = 0;
420                         handle_led(hfc, LED_S0_OFF);
421                 }
422         }
423         hfc->l1_state = state;
424 }
425 
426 static void
427 fill_isoc_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe,
428               void *buf, int num_packets, int packet_size, int interval,
429               usb_complete_t complete, void *context)
430 {
431         int k;
432 
433         urb->dev = dev;
434         urb->pipe = pipe;
435         urb->complete = complete;
436         urb->number_of_packets = num_packets;
437         urb->transfer_buffer_length = packet_size * num_packets;
438         urb->context = context;
439         urb->transfer_buffer = buf;
440         urb->transfer_flags = URB_ISO_ASAP;
441         urb->actual_length = 0;
442         urb->interval = interval;
443         for (k = 0; k < num_packets; k++) {
444                 urb->iso_frame_desc[k].offset = packet_size * k;
445                 urb->iso_frame_desc[k].length = packet_size;
446                 urb->iso_frame_desc[k].actual_length = 0;
447         }
448 }
449 
450 /* allocs urbs and start isoc transfer with two pending urbs to avoid
451  * gaps in the transfer chain
452  */
453 static int
454 start_isoc_chain(usb_fifo *fifo, int num_packets_per_urb,
455                  usb_complete_t complete, int packet_size)
456 {
457         int i, k, errcode;
458 
459         DBG(HFCUSB_DBG_INIT, "HFC-S USB: starting ISO-URBs for fifo:%d\n",
460             fifo->fifonum);
461 
462         /* allocate Memory for Iso out Urbs */
463         for (i = 0; i < 2; i++) {
464                 if (!(fifo->iso[i].purb)) {
465                         fifo->iso[i].purb =
466                                 usb_alloc_urb(num_packets_per_urb, GFP_KERNEL);
467                         if (!(fifo->iso[i].purb)) {
468                                 printk(KERN_INFO
469                                        "alloc urb for fifo %i failed!!!",
470                                        fifo->fifonum);
471                         }
472                         fifo->iso[i].owner_fifo = (struct usb_fifo *) fifo;
473 
474                         /* Init the first iso */
475                         if (ISO_BUFFER_SIZE >=
476                             (fifo->usb_packet_maxlen *
477                              num_packets_per_urb)) {
478                                 fill_isoc_urb(fifo->iso[i].purb,
479                                               fifo->hfc->dev, fifo->pipe,
480                                               fifo->iso[i].buffer,
481                                               num_packets_per_urb,
482                                               fifo->usb_packet_maxlen,
483                                               fifo->intervall, complete,
484                                               &fifo->iso[i]);
485                                 memset(fifo->iso[i].buffer, 0,
486                                        sizeof(fifo->iso[i].buffer));
487                                 /* defining packet delimeters in fifo->buffer */
488                                 for (k = 0; k < num_packets_per_urb; k++) {
489                                         fifo->iso[i].purb->
490                                                 iso_frame_desc[k].offset =
491                                                 k * packet_size;
492                                         fifo->iso[i].purb->
493                                                 iso_frame_desc[k].length =
494                                                 packet_size;
495                                 }
496                         } else {
497                                 printk(KERN_INFO
498                                        "HFC-S USB: ISO Buffer size to small!\n");
499                         }
500                 }
501                 fifo->bit_line = BITLINE_INF;
502 
503                 errcode = usb_submit_urb(fifo->iso[i].purb, GFP_KERNEL);
504                 fifo->active = (errcode >= 0) ? 1 : 0;
505                 if (errcode < 0)
506                         printk(KERN_INFO "HFC-S USB: usb_submit_urb URB nr:%d, error(%i): '%s'\n",
507                                i, errcode, symbolic(urb_errlist, errcode));
508         }
509         return (fifo->active);
510 }
511 
512 /* stops running iso chain and frees their pending urbs */
513 static void
514 stop_isoc_chain(usb_fifo *fifo)
515 {
516         int i;
517 
518         for (i = 0; i < 2; i++) {
519                 if (fifo->iso[i].purb) {
520                         DBG(HFCUSB_DBG_INIT,
521                             "HFC-S USB: Stopping iso chain for fifo %i.%i",
522                             fifo->fifonum, i);
523                         usb_kill_urb(fifo->iso[i].purb);
524                         usb_free_urb(fifo->iso[i].purb);
525                         fifo->iso[i].purb = NULL;
526                 }
527         }
528 
529         usb_kill_urb(fifo->urb);
530         usb_free_urb(fifo->urb);
531         fifo->urb = NULL;
532         fifo->active = 0;
533 }
534 
535 /* defines how much ISO packets are handled in one URB */
536 static int iso_packets[8] =
537 { ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B,
538   ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D
539 };
540 
541 static void
542 tx_iso_complete(struct urb *urb)
543 {
544         iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
545         usb_fifo *fifo = context_iso_urb->owner_fifo;
546         hfcusb_data *hfc = fifo->hfc;
547         int k, tx_offset, num_isoc_packets, sink, len, current_len,
548                 errcode;
549         int frame_complete, transp_mode, fifon, status;
550         __u8 threshbit;
551 
552         fifon = fifo->fifonum;
553         status = urb->status;
554 
555         tx_offset = 0;
556 
557         /* ISO transfer only partially completed,
558            look at individual frame status for details */
559         if (status == -EXDEV) {
560                 DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: tx_iso_complete with -EXDEV"
561                     ", urb->status %d, fifonum %d\n",
562                     status, fifon);
563 
564                 for (k = 0; k < iso_packets[fifon]; ++k) {
565                         errcode = urb->iso_frame_desc[k].status;
566                         if (errcode)
567                                 DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: tx_iso_complete "
568                                     "packet %i, status: %i\n",
569                                     k, errcode);
570                 }
571 
572                 // clear status, so go on with ISO transfers
573                 status = 0;
574         }
575 
576         if (fifo->active && !status) {
577                 transp_mode = 0;
578                 if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
579                         transp_mode = 1;
580 
581                 /* is FifoFull-threshold set for our channel? */
582                 threshbit = (hfc->threshold_mask & (1 << fifon));
583                 num_isoc_packets = iso_packets[fifon];
584 
585                 /* predict dataflow to avoid fifo overflow */
586                 if (fifon >= HFCUSB_D_TX) {
587                         sink = (threshbit) ? SINK_DMIN : SINK_DMAX;
588                 } else {
589                         sink = (threshbit) ? SINK_MIN : SINK_MAX;
590                 }
591                 fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
592                               context_iso_urb->buffer, num_isoc_packets,
593                               fifo->usb_packet_maxlen, fifo->intervall,
594                               tx_iso_complete, urb->context);
595                 memset(context_iso_urb->buffer, 0,
596                        sizeof(context_iso_urb->buffer));
597                 frame_complete = 0;
598 
599                 /* Generate next ISO Packets */
600                 for (k = 0; k < num_isoc_packets; ++k) {
601                         if (fifo->skbuff) {
602                                 len = fifo->skbuff->len;
603                                 /* we lower data margin every msec */
604                                 fifo->bit_line -= sink;
605                                 current_len = (0 - fifo->bit_line) / 8;
606                                 /* maximum 15 byte for every ISO packet makes our life easier */
607                                 if (current_len > 14)
608                                         current_len = 14;
609                                 current_len =
610                                         (len <=
611                                          current_len) ? len : current_len;
612                                 /* how much bit do we put on the line? */
613                                 fifo->bit_line += current_len * 8;
614 
615                                 context_iso_urb->buffer[tx_offset] = 0;
616                                 if (current_len == len) {
617                                         if (!transp_mode) {
618                                                 /* here frame completion */
619                                                 context_iso_urb->
620                                                         buffer[tx_offset] = 1;
621                                                 /* add 2 byte flags and 16bit CRC at end of ISDN frame */
622                                                 fifo->bit_line += 32;
623                                         }
624                                         frame_complete = 1;
625                                 }
626 
627                                 memcpy(context_iso_urb->buffer +
628                                        tx_offset + 1, fifo->skbuff->data,
629                                        current_len);
630                                 skb_pull(fifo->skbuff, current_len);
631 
632                                 /* define packet delimeters within the URB buffer */
633                                 urb->iso_frame_desc[k].offset = tx_offset;
634                                 urb->iso_frame_desc[k].length =
635                                         current_len + 1;
636 
637                                 tx_offset += (current_len + 1);
638                         } else {
639                                 urb->iso_frame_desc[k].offset =
640                                         tx_offset++;
641 
642                                 urb->iso_frame_desc[k].length = 1;
643                                 fifo->bit_line -= sink; /* we lower data margin every msec */
644 
645                                 if (fifo->bit_line < BITLINE_INF) {
646                                         fifo->bit_line = BITLINE_INF;
647                                 }
648                         }
649 
650                         if (frame_complete) {
651                                 fifo->delete_flg = 1;
652                                 fifo->hif->l1l2(fifo->hif,
653                                                 PH_DATA | CONFIRM,
654                                                 (void *) (unsigned long) fifo->skbuff->
655                                                 truesize);
656                                 if (fifo->skbuff && fifo->delete_flg) {
657                                         dev_kfree_skb_any(fifo->skbuff);
658                                         fifo->skbuff = NULL;
659                                         fifo->delete_flg = 0;
660                                 }
661                                 frame_complete = 0;
662                         }
663                 }
664                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
665                 if (errcode < 0) {
666                         printk(KERN_INFO
667                                "HFC-S USB: error submitting ISO URB: %d\n",
668                                errcode);
669                 }
670         } else {
671                 if (status && !hfc->disc_flag) {
672                         printk(KERN_INFO
673                                "HFC-S USB: tx_iso_complete: error(%i): '%s', fifonum=%d\n",
674                                status, symbolic(urb_errlist, status), fifon);
675                 }
676         }
677 }
678 
679 static void
680 rx_iso_complete(struct urb *urb)
681 {
682         iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
683         usb_fifo *fifo = context_iso_urb->owner_fifo;
684         hfcusb_data *hfc = fifo->hfc;
685         int k, len, errcode, offset, num_isoc_packets, fifon, maxlen,
686                 status;
687         unsigned int iso_status;
688         __u8 *buf;
689         static __u8 eof[8];
690 
691         fifon = fifo->fifonum;
692         status = urb->status;
693 
694         if (urb->status == -EOVERFLOW) {
695                 DBG(HFCUSB_DBG_VERBOSE_USB,
696                     "HFC-USB: ignoring USB DATAOVERRUN fifo(%i)", fifon);
697                 status = 0;
698         }
699 
700         /* ISO transfer only partially completed,
701            look at individual frame status for details */
702         if (status == -EXDEV) {
703                 DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: rx_iso_complete with -EXDEV "
704                     "urb->status %d, fifonum %d\n",
705                     status, fifon);
706                 status = 0;
707         }
708 
709         if (fifo->active && !status) {
710                 num_isoc_packets = iso_packets[fifon];
711                 maxlen = fifo->usb_packet_maxlen;
712                 for (k = 0; k < num_isoc_packets; ++k) {
713                         len = urb->iso_frame_desc[k].actual_length;
714                         offset = urb->iso_frame_desc[k].offset;
715                         buf = context_iso_urb->buffer + offset;
716                         iso_status = urb->iso_frame_desc[k].status;
717 
718                         if (iso_status && !hfc->disc_flag)
719                                 DBG(HFCUSB_DBG_VERBOSE_USB,
720                                     "HFC-S USB: rx_iso_complete "
721                                     "ISO packet %i, status: %i\n",
722                                     k, iso_status);
723 
724                         if (fifon == HFCUSB_D_RX) {
725                                 DBG(HFCUSB_DBG_VERBOSE_USB,
726                                     "HFC-S USB: ISO-D-RX lst_urblen:%2d "
727                                     "act_urblen:%2d max-urblen:%2d EOF:0x%0x",
728                                     fifo->last_urblen, len, maxlen,
729                                     eof[5]);
730 
731                                 DBG_PACKET(HFCUSB_DBG_VERBOSE_USB, buf, len);
732                         }
733 
734                         if (fifo->last_urblen != maxlen) {
735                                 /* the threshold mask is in the 2nd status byte */
736                                 hfc->threshold_mask = buf[1];
737                                 /* care for L1 state only for D-Channel
738                                    to avoid overlapped iso completions */
739                                 if (fifon == HFCUSB_D_RX) {
740                                         /* the S0 state is in the upper half
741                                            of the 1st status byte */
742                                         s0_state_handler(hfc, buf[0] >> 4);
743                                 }
744                                 eof[fifon] = buf[0] & 1;
745                                 if (len > 2)
746                                         collect_rx_frame(fifo, buf + 2,
747                                                          len - 2,
748                                                          (len < maxlen) ?
749                                                          eof[fifon] : 0);
750                         } else {
751                                 collect_rx_frame(fifo, buf, len,
752                                                  (len <
753                                                   maxlen) ? eof[fifon] :
754                                                  0);
755                         }
756                         fifo->last_urblen = len;
757                 }
758 
759                 fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
760                               context_iso_urb->buffer, num_isoc_packets,
761                               fifo->usb_packet_maxlen, fifo->intervall,
762                               rx_iso_complete, urb->context);
763                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
764                 if (errcode < 0) {
765                         printk(KERN_ERR
766                                "HFC-S USB: error submitting ISO URB: %d\n",
767                                errcode);
768                 }
769         } else {
770                 if (status && !hfc->disc_flag) {
771                         printk(KERN_ERR
772                                "HFC-S USB: rx_iso_complete : "
773                                "urb->status %d, fifonum %d\n",
774                                status, fifon);
775                 }
776         }
777 }
778 
779 /* collect rx data from INT- and ISO-URBs  */
780 static void
781 collect_rx_frame(usb_fifo *fifo, __u8 *data, int len, int finish)
782 {
783         hfcusb_data *hfc = fifo->hfc;
784         int transp_mode, fifon;
785 
786         fifon = fifo->fifonum;
787         transp_mode = 0;
788         if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
789                 transp_mode = 1;
790 
791         if (!fifo->skbuff) {
792                 fifo->skbuff = dev_alloc_skb(fifo->max_size + 3);
793                 if (!fifo->skbuff) {
794                         printk(KERN_ERR
795                                "HFC-S USB: cannot allocate buffer for fifo(%d)\n",
796                                fifon);
797                         return;
798                 }
799         }
800         if (len) {
801                 if (fifo->skbuff->len + len < fifo->max_size) {
802                         memcpy(skb_put(fifo->skbuff, len), data, len);
803                 } else {
804                         DBG(HFCUSB_DBG_FIFO_ERR,
805                             "HCF-USB: got frame exceeded fifo->max_size(%d) fifo(%d)",
806                             fifo->max_size, fifon);
807                         DBG_SKB(HFCUSB_DBG_VERBOSE_USB, fifo->skbuff);
808                         skb_trim(fifo->skbuff, 0);
809                 }
810         }
811         if (transp_mode && fifo->skbuff->len >= 128) {
812                 fifo->hif->l1l2(fifo->hif, PH_DATA | INDICATION,
813                                 fifo->skbuff);
814                 fifo->skbuff = NULL;
815                 return;
816         }
817         /* we have a complete hdlc packet */
818         if (finish) {
819                 if (fifo->skbuff->len > 3 &&
820                     !fifo->skbuff->data[fifo->skbuff->len - 1]) {
821 
822                         if (fifon == HFCUSB_D_RX) {
823                                 DBG(HFCUSB_DBG_DCHANNEL,
824                                     "HFC-S USB: D-RX len(%d)", fifo->skbuff->len);
825                                 DBG_SKB(HFCUSB_DBG_DCHANNEL, fifo->skbuff);
826                         }
827 
828                         /* remove CRC & status */
829                         skb_trim(fifo->skbuff, fifo->skbuff->len - 3);
830                         if (fifon == HFCUSB_PCM_RX) {
831                                 fifo->hif->l1l2(fifo->hif,
832                                                 PH_DATA_E | INDICATION,
833                                                 fifo->skbuff);
834                         } else
835                                 fifo->hif->l1l2(fifo->hif,
836                                                 PH_DATA | INDICATION,
837                                                 fifo->skbuff);
838                         fifo->skbuff = NULL;    /* buffer was freed from upper layer */
839                 } else {
840                         DBG(HFCUSB_DBG_FIFO_ERR,
841                             "HFC-S USB: ERROR frame len(%d) fifo(%d)",
842                             fifo->skbuff->len, fifon);
843                         DBG_SKB(HFCUSB_DBG_VERBOSE_USB, fifo->skbuff);
844                         skb_trim(fifo->skbuff, 0);
845                 }
846         }
847 }
848 
849 static void
850 rx_int_complete(struct urb *urb)
851 {
852         int len;
853         int status;
854         __u8 *buf, maxlen, fifon;
855         usb_fifo *fifo = (usb_fifo *) urb->context;
856         hfcusb_data *hfc = fifo->hfc;
857         static __u8 eof[8];
858 
859         urb->dev = hfc->dev;    /* security init */
860 
861         fifon = fifo->fifonum;
862         if ((!fifo->active) || (urb->status)) {
863                 DBG(HFCUSB_DBG_INIT, "HFC-S USB: RX-Fifo %i is going down (%i)",
864                     fifon, urb->status);
865 
866                 fifo->urb->interval = 0;        /* cancel automatic rescheduling */
867                 if (fifo->skbuff) {
868                         dev_kfree_skb_any(fifo->skbuff);
869                         fifo->skbuff = NULL;
870                 }
871                 return;
872         }
873         len = urb->actual_length;
874         buf = fifo->buffer;
875         maxlen = fifo->usb_packet_maxlen;
876 
877         if (fifon == HFCUSB_D_RX) {
878                 DBG(HFCUSB_DBG_VERBOSE_USB,
879                     "HFC-S USB: INT-D-RX lst_urblen:%2d "
880                     "act_urblen:%2d max-urblen:%2d EOF:0x%0x",
881                     fifo->last_urblen, len, maxlen,
882                     eof[5]);
883                 DBG_PACKET(HFCUSB_DBG_VERBOSE_USB, buf, len);
884         }
885 
886         if (fifo->last_urblen != fifo->usb_packet_maxlen) {
887                 /* the threshold mask is in the 2nd status byte */
888                 hfc->threshold_mask = buf[1];
889                 /* the S0 state is in the upper half of the 1st status byte */
890                 s0_state_handler(hfc, buf[0] >> 4);
891                 eof[fifon] = buf[0] & 1;
892                 /* if we have more than the 2 status bytes -> collect data */
893                 if (len > 2)
894                         collect_rx_frame(fifo, buf + 2,
895                                          urb->actual_length - 2,
896                                          (len < maxlen) ? eof[fifon] : 0);
897         } else {
898                 collect_rx_frame(fifo, buf, urb->actual_length,
899                                  (len < maxlen) ? eof[fifon] : 0);
900         }
901         fifo->last_urblen = urb->actual_length;
902         status = usb_submit_urb(urb, GFP_ATOMIC);
903         if (status) {
904                 printk(KERN_INFO
905                        "HFC-S USB: %s error resubmitting URB fifo(%d)\n",
906                        __func__, fifon);
907         }
908 }
909 
910 /* start initial INT-URB for certain fifo */
911 static void
912 start_int_fifo(usb_fifo *fifo)
913 {
914         int errcode;
915 
916         DBG(HFCUSB_DBG_INIT, "HFC-S USB: starting RX INT-URB for fifo:%d\n",
917             fifo->fifonum);
918 
919         if (!fifo->urb) {
920                 fifo->urb = usb_alloc_urb(0, GFP_KERNEL);
921                 if (!fifo->urb)
922                         return;
923         }
924         usb_fill_int_urb(fifo->urb, fifo->hfc->dev, fifo->pipe,
925                          fifo->buffer, fifo->usb_packet_maxlen,
926                          rx_int_complete, fifo, fifo->intervall);
927         fifo->active = 1;       /* must be marked active */
928         errcode = usb_submit_urb(fifo->urb, GFP_KERNEL);
929         if (errcode) {
930                 printk(KERN_ERR
931                        "HFC-S USB: submit URB error(start_int_info): status:%i\n",
932                        errcode);
933                 fifo->active = 0;
934                 fifo->skbuff = NULL;
935         }
936 }
937 
938 static void
939 setup_bchannel(hfcusb_data *hfc, int channel, int mode)
940 {
941         __u8 val, idx_table[2] = { 0, 2 };
942 
943         if (hfc->disc_flag) {
944                 return;
945         }
946         DBG(HFCUSB_DBG_STATES, "HFC-S USB: setting channel %d to mode %d",
947             channel, mode);
948         hfc->b_mode[channel] = mode;
949 
950         /* setup CON_HDLC */
951         val = 0;
952         if (mode != L1_MODE_NULL)
953                 val = 8;        /* enable fifo? */
954         if (mode == L1_MODE_TRANS)
955                 val |= 2;       /* set transparent bit */
956 
957         /* set FIFO to transmit register */
958         queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel], 1);
959         queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
960         /* reset fifo */
961         queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
962         /* set FIFO to receive register */
963         queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel] + 1, 1);
964         queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
965         /* reset fifo */
966         queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
967 
968         val = 0x40;
969         if (hfc->b_mode[0])
970                 val |= 1;
971         if (hfc->b_mode[1])
972                 val |= 2;
973         queue_control_request(hfc, HFCUSB_SCTRL, val, 1);
974 
975         val = 0;
976         if (hfc->b_mode[0])
977                 val |= 1;
978         if (hfc->b_mode[1])
979                 val |= 2;
980         queue_control_request(hfc, HFCUSB_SCTRL_R, val, 1);
981 
982         if (mode == L1_MODE_NULL) {
983                 if (channel)
984                         handle_led(hfc, LED_B2_OFF);
985                 else
986                         handle_led(hfc, LED_B1_OFF);
987         } else {
988                 if (channel)
989                         handle_led(hfc, LED_B2_ON);
990                 else
991                         handle_led(hfc, LED_B1_ON);
992         }
993 }
994 
995 static void
996 hfc_usb_l2l1(struct hisax_if *my_hisax_if, int pr, void *arg)
997 {
998         usb_fifo *fifo = my_hisax_if->priv;
999         hfcusb_data *hfc = fifo->hfc;
1000 
1001         switch (pr) {
1002         case PH_ACTIVATE | REQUEST:
1003                 if (fifo->fifonum == HFCUSB_D_TX) {
1004                         DBG(HFCUSB_DBG_STATES,
1005                             "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_ACTIVATE | REQUEST");
1006 
1007                         if (hfc->l1_state != 3
1008                             && hfc->l1_state != 7) {
1009                                 hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
1010                                                    PH_DEACTIVATE |
1011                                                    INDICATION,
1012                                                    NULL);
1013                                 DBG(HFCUSB_DBG_STATES,
1014                                     "HFC-S USB: PH_DEACTIVATE | INDICATION sent (not state 3 or 7)");
1015                         } else {
1016                                 if (hfc->l1_state == 7) {       /* l1 already active */
1017                                         hfc->d_if.ifc.l1l2(&hfc->
1018                                                            d_if.
1019                                                            ifc,
1020                                                            PH_ACTIVATE
1021                                                            |
1022                                                            INDICATION,
1023                                                            NULL);
1024                                         DBG(HFCUSB_DBG_STATES,
1025                                             "HFC-S USB: PH_ACTIVATE | INDICATION sent again ;)");
1026                                 } else {
1027                                         /* force sending sending INFO1 */
1028                                         queue_control_request(hfc,
1029                                                               HFCUSB_STATES,
1030                                                               0x14,
1031                                                               1);
1032                                         mdelay(1);
1033                                         /* start l1 activation */
1034                                         queue_control_request(hfc,
1035                                                               HFCUSB_STATES,
1036                                                               0x04,
1037                                                               1);
1038                                         if (!timer_pending
1039                                             (&hfc->t3_timer)) {
1040                                                 hfc->t3_timer.
1041                                                         expires =
1042                                                         jiffies +
1043                                                         (HFC_TIMER_T3 *
1044                                                          HZ) / 1000;
1045                                                 add_timer(&hfc->
1046                                                           t3_timer);
1047                                         }
1048                                 }
1049                         }
1050                 } else {
1051                         DBG(HFCUSB_DBG_STATES,
1052                             "HFC_USB: hfc_usb_d_l2l1 B-chan: PH_ACTIVATE | REQUEST");
1053                         setup_bchannel(hfc,
1054                                        (fifo->fifonum ==
1055                                         HFCUSB_B1_TX) ? 0 : 1,
1056                                        (long) arg);
1057                         fifo->hif->l1l2(fifo->hif,
1058                                         PH_ACTIVATE | INDICATION,
1059                                         NULL);
1060                 }
1061                 break;
1062         case PH_DEACTIVATE | REQUEST:
1063                 if (fifo->fifonum == HFCUSB_D_TX) {
1064                         DBG(HFCUSB_DBG_STATES,
1065                             "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_DEACTIVATE | REQUEST");
1066                 } else {
1067                         DBG(HFCUSB_DBG_STATES,
1068                             "HFC_USB: hfc_usb_d_l2l1 Bx-chan: PH_DEACTIVATE | REQUEST");
1069                         setup_bchannel(hfc,
1070                                        (fifo->fifonum ==
1071                                         HFCUSB_B1_TX) ? 0 : 1,
1072                                        (int) L1_MODE_NULL);
1073                         fifo->hif->l1l2(fifo->hif,
1074                                         PH_DEACTIVATE | INDICATION,
1075                                         NULL);
1076                 }
1077                 break;
1078         case PH_DATA | REQUEST:
1079                 if (fifo->skbuff && fifo->delete_flg) {
1080                         dev_kfree_skb_any(fifo->skbuff);
1081                         fifo->skbuff = NULL;
1082                         fifo->delete_flg = 0;
1083                 }
1084                 fifo->skbuff = arg;     /* we have a new buffer */
1085                 break;
1086         default:
1087                 DBG(HFCUSB_DBG_STATES,
1088                     "HFC_USB: hfc_usb_d_l2l1: unknown state : %#x", pr);
1089                 break;
1090         }
1091 }
1092 
1093 /* initial init HFC-S USB chip registers, HiSax interface, USB URBs */
1094 static int
1095 hfc_usb_init(hfcusb_data *hfc)
1096 {
1097         usb_fifo *fifo;
1098         int i;
1099         u_char b;
1100         struct hisax_b_if *p_b_if[2];
1101 
1102         /* check the chip id */
1103         if (read_usb(hfc, HFCUSB_CHIP_ID, &b) != 1) {
1104                 printk(KERN_INFO "HFC-USB: cannot read chip id\n");
1105                 return (1);
1106         }
1107         if (b != HFCUSB_CHIPID) {
1108                 printk(KERN_INFO "HFC-S USB: Invalid chip id 0x%02x\n", b);
1109                 return (1);
1110         }
1111 
1112         /* first set the needed config, interface and alternate */
1113         usb_set_interface(hfc->dev, hfc->if_used, hfc->alt_used);
1114 
1115         /* do Chip reset */
1116         write_usb(hfc, HFCUSB_CIRM, 8);
1117         /* aux = output, reset off */
1118         write_usb(hfc, HFCUSB_CIRM, 0x10);
1119 
1120         /* set USB_SIZE to match wMaxPacketSize for INT or BULK transfers */
1121         write_usb(hfc, HFCUSB_USB_SIZE,
1122                   (hfc->packet_size / 8) | ((hfc->packet_size / 8) << 4));
1123 
1124         /* set USB_SIZE_I to match wMaxPacketSize for ISO transfers */
1125         write_usb(hfc, HFCUSB_USB_SIZE_I, hfc->iso_packet_size);
1126 
1127         /* enable PCM/GCI master mode */
1128         write_usb(hfc, HFCUSB_MST_MODE1, 0);    /* set default values */
1129         write_usb(hfc, HFCUSB_MST_MODE0, 1);    /* enable master mode */
1130 
1131         /* init the fifos */
1132         write_usb(hfc, HFCUSB_F_THRES,
1133                   (HFCUSB_TX_THRESHOLD /
1134                    8) | ((HFCUSB_RX_THRESHOLD / 8) << 4));
1135 
1136         fifo = hfc->fifos;
1137         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1138                 write_usb(hfc, HFCUSB_FIFO, i); /* select the desired fifo */
1139                 fifo[i].skbuff = NULL;  /* init buffer pointer */
1140                 fifo[i].max_size =
1141                         (i <= HFCUSB_B2_RX) ? MAX_BCH_SIZE : MAX_DFRAME_LEN;
1142                 fifo[i].last_urblen = 0;
1143                 /* set 2 bit for D- & E-channel */
1144                 write_usb(hfc, HFCUSB_HDLC_PAR,
1145                           ((i <= HFCUSB_B2_RX) ? 0 : 2));
1146                 /* rx hdlc, enable IFF for D-channel */
1147                 write_usb(hfc, HFCUSB_CON_HDLC,
1148                           ((i == HFCUSB_D_TX) ? 0x09 : 0x08));
1149                 write_usb(hfc, HFCUSB_INC_RES_F, 2);    /* reset the fifo */
1150         }
1151 
1152         write_usb(hfc, HFCUSB_CLKDEL, 0x0f);    /* clock delay value */
1153         write_usb(hfc, HFCUSB_STATES, 3 | 0x10);        /* set deactivated mode */
1154         write_usb(hfc, HFCUSB_STATES, 3);       /* enable state machine */
1155 
1156         write_usb(hfc, HFCUSB_SCTRL_R, 0);      /* disable both B receivers */
1157         write_usb(hfc, HFCUSB_SCTRL, 0x40);     /* disable B transmitters + capacitive mode */
1158 
1159         /* set both B-channel to not connected */
1160         hfc->b_mode[0] = L1_MODE_NULL;
1161         hfc->b_mode[1] = L1_MODE_NULL;
1162 
1163         hfc->l1_activated = 0;
1164         hfc->disc_flag = 0;
1165         hfc->led_state = 0;
1166         hfc->old_led_state = 0;
1167 
1168         /* init the t3 timer */
1169         init_timer(&hfc->t3_timer);
1170         hfc->t3_timer.data = (long) hfc;
1171         hfc->t3_timer.function = (void *) l1_timer_expire_t3;
1172 
1173         /* init the t4 timer */
1174         init_timer(&hfc->t4_timer);
1175         hfc->t4_timer.data = (long) hfc;
1176         hfc->t4_timer.function = (void *) l1_timer_expire_t4;
1177 
1178         /* init the background machinery for control requests */
1179         hfc->ctrl_read.bRequestType = 0xc0;
1180         hfc->ctrl_read.bRequest = 1;
1181         hfc->ctrl_read.wLength = cpu_to_le16(1);
1182         hfc->ctrl_write.bRequestType = 0x40;
1183         hfc->ctrl_write.bRequest = 0;
1184         hfc->ctrl_write.wLength = 0;
1185         usb_fill_control_urb(hfc->ctrl_urb,
1186                              hfc->dev,
1187                              hfc->ctrl_out_pipe,
1188                              (u_char *)&hfc->ctrl_write,
1189                              NULL, 0, ctrl_complete, hfc);
1190         /* Init All Fifos */
1191         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1192                 hfc->fifos[i].iso[0].purb = NULL;
1193                 hfc->fifos[i].iso[1].purb = NULL;
1194                 hfc->fifos[i].active = 0;
1195         }
1196         /* register Modul to upper Hisax Layers */
1197         hfc->d_if.owner = THIS_MODULE;
1198         hfc->d_if.ifc.priv = &hfc->fifos[HFCUSB_D_TX];
1199         hfc->d_if.ifc.l2l1 = hfc_usb_l2l1;
1200         for (i = 0; i < 2; i++) {
1201                 hfc->b_if[i].ifc.priv = &hfc->fifos[HFCUSB_B1_TX + i * 2];
1202                 hfc->b_if[i].ifc.l2l1 = hfc_usb_l2l1;
1203                 p_b_if[i] = &hfc->b_if[i];
1204         }
1205         /* default Prot: EURO ISDN, should be a module_param */
1206         hfc->protocol = 2;
1207         i = hisax_register(&hfc->d_if, p_b_if, "hfc_usb", hfc->protocol);
1208         if (i) {
1209                 printk(KERN_INFO "HFC-S USB: hisax_register -> %d\n", i);
1210                 return i;
1211         }
1212 
1213 #ifdef CONFIG_HISAX_DEBUG
1214         hfc_debug = debug;
1215 #endif
1216 
1217         for (i = 0; i < 4; i++)
1218                 hfc->fifos[i].hif = &p_b_if[i / 2]->ifc;
1219         for (i = 4; i < 8; i++)
1220                 hfc->fifos[i].hif = &hfc->d_if.ifc;
1221 
1222         /* 3 (+1) INT IN + 3 ISO OUT */
1223         if (hfc->cfg_used == CNF_3INT3ISO || hfc->cfg_used == CNF_4INT3ISO) {
1224                 start_int_fifo(hfc->fifos + HFCUSB_D_RX);
1225                 if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1226                         start_int_fifo(hfc->fifos + HFCUSB_PCM_RX);
1227                 start_int_fifo(hfc->fifos + HFCUSB_B1_RX);
1228                 start_int_fifo(hfc->fifos + HFCUSB_B2_RX);
1229         }
1230         /* 3 (+1) ISO IN + 3 ISO OUT */
1231         if (hfc->cfg_used == CNF_3ISO3ISO || hfc->cfg_used == CNF_4ISO3ISO) {
1232                 start_isoc_chain(hfc->fifos + HFCUSB_D_RX, ISOC_PACKETS_D,
1233                                  rx_iso_complete, 16);
1234                 if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1235                         start_isoc_chain(hfc->fifos + HFCUSB_PCM_RX,
1236                                          ISOC_PACKETS_D, rx_iso_complete,
1237                                          16);
1238                 start_isoc_chain(hfc->fifos + HFCUSB_B1_RX, ISOC_PACKETS_B,
1239                                  rx_iso_complete, 16);
1240                 start_isoc_chain(hfc->fifos + HFCUSB_B2_RX, ISOC_PACKETS_B,
1241                                  rx_iso_complete, 16);
1242         }
1243 
1244         start_isoc_chain(hfc->fifos + HFCUSB_D_TX, ISOC_PACKETS_D,
1245                          tx_iso_complete, 1);
1246         start_isoc_chain(hfc->fifos + HFCUSB_B1_TX, ISOC_PACKETS_B,
1247                          tx_iso_complete, 1);
1248         start_isoc_chain(hfc->fifos + HFCUSB_B2_TX, ISOC_PACKETS_B,
1249                          tx_iso_complete, 1);
1250 
1251         handle_led(hfc, LED_POWER_ON);
1252 
1253         return (0);
1254 }
1255 
1256 /* initial callback for each plugged USB device */
1257 static int
1258 hfc_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1259 {
1260         struct usb_device *dev = interface_to_usbdev(intf);
1261         hfcusb_data *context;
1262         struct usb_host_interface *iface = intf->cur_altsetting;
1263         struct usb_host_interface *iface_used = NULL;
1264         struct usb_host_endpoint *ep;
1265         int ifnum = iface->desc.bInterfaceNumber;
1266         int i, idx, alt_idx, probe_alt_setting, vend_idx, cfg_used, *vcf,
1267                 attr, cfg_found, cidx, ep_addr;
1268         int cmptbl[16], small_match, iso_packet_size, packet_size,
1269                 alt_used = 0;
1270         hfcsusb_vdata *driver_info;
1271 
1272         vend_idx = 0xffff;
1273         for (i = 0; hfcusb_idtab[i].idVendor; i++) {
1274                 if ((le16_to_cpu(dev->descriptor.idVendor) == hfcusb_idtab[i].idVendor)
1275                     && (le16_to_cpu(dev->descriptor.idProduct) == hfcusb_idtab[i].idProduct)) {
1276                         vend_idx = i;
1277                         continue;
1278                 }
1279         }
1280 
1281         printk(KERN_INFO
1282                "HFC-S USB: probing interface(%d) actalt(%d) minor(%d)\n",
1283                ifnum, iface->desc.bAlternateSetting, intf->minor);
1284 
1285         if (vend_idx != 0xffff) {
1286                 /* if vendor and product ID is OK, start probing alternate settings */
1287                 alt_idx = 0;
1288                 small_match = 0xffff;
1289 
1290                 /* default settings */
1291                 iso_packet_size = 16;
1292                 packet_size = 64;
1293 
1294                 while (alt_idx < intf->num_altsetting) {
1295                         iface = intf->altsetting + alt_idx;
1296                         probe_alt_setting = iface->desc.bAlternateSetting;
1297                         cfg_used = 0;
1298 
1299                         /* check for config EOL element */
1300                         while (validconf[cfg_used][0]) {
1301                                 cfg_found = 1;
1302                                 vcf = validconf[cfg_used];
1303                                 /* first endpoint descriptor */
1304                                 ep = iface->endpoint;
1305 
1306                                 memcpy(cmptbl, vcf, 16 * sizeof(int));
1307 
1308                                 /* check for all endpoints in this alternate setting */
1309                                 for (i = 0; i < iface->desc.bNumEndpoints;
1310                                      i++) {
1311                                         ep_addr =
1312                                                 ep->desc.bEndpointAddress;
1313                                         /* get endpoint base */
1314                                         idx = ((ep_addr & 0x7f) - 1) * 2;
1315                                         if (ep_addr & 0x80)
1316                                                 idx++;
1317                                         attr = ep->desc.bmAttributes;
1318                                         if (cmptbl[idx] == EP_NUL) {
1319                                                 cfg_found = 0;
1320                                         }
1321                                         if (attr == USB_ENDPOINT_XFER_INT
1322                                             && cmptbl[idx] == EP_INT)
1323                                                 cmptbl[idx] = EP_NUL;
1324                                         if (attr == USB_ENDPOINT_XFER_BULK
1325                                             && cmptbl[idx] == EP_BLK)
1326                                                 cmptbl[idx] = EP_NUL;
1327                                         if (attr == USB_ENDPOINT_XFER_ISOC
1328                                             && cmptbl[idx] == EP_ISO)
1329                                                 cmptbl[idx] = EP_NUL;
1330 
1331                                         /* check if all INT endpoints match minimum interval */
1332                                         if ((attr == USB_ENDPOINT_XFER_INT)
1333                                             && (ep->desc.bInterval < vcf[17])) {
1334                                                 cfg_found = 0;
1335                                         }
1336                                         ep++;
1337                                 }
1338                                 for (i = 0; i < 16; i++) {
1339                                         /* all entries must be EP_NOP or EP_NUL for a valid config */
1340                                         if (cmptbl[i] != EP_NOP
1341                                             && cmptbl[i] != EP_NUL)
1342                                                 cfg_found = 0;
1343                                 }
1344                                 if (cfg_found) {
1345                                         if (cfg_used < small_match) {
1346                                                 small_match = cfg_used;
1347                                                 alt_used =
1348                                                         probe_alt_setting;
1349                                                 iface_used = iface;
1350                                         }
1351                                 }
1352                                 cfg_used++;
1353                         }
1354                         alt_idx++;
1355                 } /* (alt_idx < intf->num_altsetting) */
1356 
1357                 /* found a valid USB Ta Endpint config */
1358                 if (small_match != 0xffff) {
1359                         iface = iface_used;
1360                         if (!(context = kzalloc(sizeof(hfcusb_data), GFP_KERNEL)))
1361                                 return (-ENOMEM);       /* got no mem */
1362 
1363                         ep = iface->endpoint;
1364                         vcf = validconf[small_match];
1365 
1366                         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1367                                 ep_addr = ep->desc.bEndpointAddress;
1368                                 /* get endpoint base */
1369                                 idx = ((ep_addr & 0x7f) - 1) * 2;
1370                                 if (ep_addr & 0x80)
1371                                         idx++;
1372                                 cidx = idx & 7;
1373                                 attr = ep->desc.bmAttributes;
1374 
1375                                 /* init Endpoints */
1376                                 if (vcf[idx] != EP_NOP
1377                                     && vcf[idx] != EP_NUL) {
1378                                         switch (attr) {
1379                                         case USB_ENDPOINT_XFER_INT:
1380                                                 context->
1381                                                         fifos[cidx].
1382                                                         pipe =
1383                                                         usb_rcvintpipe
1384                                                         (dev,
1385                                                          ep->desc.
1386                                                          bEndpointAddress);
1387                                                 context->
1388                                                         fifos[cidx].
1389                                                         usb_transfer_mode
1390                                                         = USB_INT;
1391                                                 packet_size =
1392                                                         le16_to_cpu(ep->desc.wMaxPacketSize);
1393                                                 break;
1394                                         case USB_ENDPOINT_XFER_BULK:
1395                                                 if (ep_addr & 0x80)
1396                                                         context->
1397                                                                 fifos
1398                                                                 [cidx].
1399                                                                 pipe =
1400                                                                 usb_rcvbulkpipe
1401                                                                 (dev,
1402                                                                  ep->
1403                                                                  desc.
1404                                                                  bEndpointAddress);
1405                                                 else
1406                                                         context->
1407                                                                 fifos
1408                                                                 [cidx].
1409                                                                 pipe =
1410                                                                 usb_sndbulkpipe
1411                                                                 (dev,
1412                                                                  ep->
1413                                                                  desc.
1414                                                                  bEndpointAddress);
1415                                                 context->
1416                                                         fifos[cidx].
1417                                                         usb_transfer_mode
1418                                                         = USB_BULK;
1419                                                 packet_size =
1420                                                         le16_to_cpu(ep->desc.wMaxPacketSize);
1421                                                 break;
1422                                         case USB_ENDPOINT_XFER_ISOC:
1423                                                 if (ep_addr & 0x80)
1424                                                         context->
1425                                                                 fifos
1426                                                                 [cidx].
1427                                                                 pipe =
1428                                                                 usb_rcvisocpipe
1429                                                                 (dev,
1430                                                                  ep->
1431                                                                  desc.
1432                                                                  bEndpointAddress);
1433                                                 else
1434                                                         context->
1435                                                                 fifos
1436                                                                 [cidx].
1437                                                                 pipe =
1438                                                                 usb_sndisocpipe
1439                                                                 (dev,
1440                                                                  ep->
1441                                                                  desc.
1442                                                                  bEndpointAddress);
1443                                                 context->
1444                                                         fifos[cidx].
1445                                                         usb_transfer_mode
1446                                                         = USB_ISOC;
1447                                                 iso_packet_size =
1448                                                         le16_to_cpu(ep->desc.wMaxPacketSize);
1449                                                 break;
1450                                         default:
1451                                                 context->
1452                                                         fifos[cidx].
1453                                                         pipe = 0;
1454                                         }       /* switch attribute */
1455 
1456                                         if (context->fifos[cidx].pipe) {
1457                                                 context->fifos[cidx].
1458                                                         fifonum = cidx;
1459                                                 context->fifos[cidx].hfc =
1460                                                         context;
1461                                                 context->fifos[cidx].usb_packet_maxlen =
1462                                                         le16_to_cpu(ep->desc.wMaxPacketSize);
1463                                                 context->fifos[cidx].
1464                                                         intervall =
1465                                                         ep->desc.bInterval;
1466                                                 context->fifos[cidx].
1467                                                         skbuff = NULL;
1468                                         }
1469                                 }
1470                                 ep++;
1471                         }
1472                         context->dev = dev;     /* save device */
1473                         context->if_used = ifnum;       /* save used interface */
1474                         context->alt_used = alt_used;   /* and alternate config */
1475                         context->ctrl_paksize = dev->descriptor.bMaxPacketSize0;        /* control size */
1476                         context->cfg_used = vcf[16];    /* store used config */
1477                         context->vend_idx = vend_idx;   /* store found vendor */
1478                         context->packet_size = packet_size;
1479                         context->iso_packet_size = iso_packet_size;
1480 
1481                         /* create the control pipes needed for register access */
1482                         context->ctrl_in_pipe =
1483                                 usb_rcvctrlpipe(context->dev, 0);
1484                         context->ctrl_out_pipe =
1485                                 usb_sndctrlpipe(context->dev, 0);
1486 
1487                         driver_info = (hfcsusb_vdata *)
1488                                       hfcusb_idtab[vend_idx].driver_info;
1489 
1490                         context->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
1491 
1492                         if (!context->ctrl_urb) {
1493                                 pr_warn("%s: No memory for control urb\n",
1494                                         driver_info->vend_name);
1495                                 kfree(context);
1496                                 return -ENOMEM;
1497                         }
1498 
1499                         pr_info("HFC-S USB: detected \"%s\"\n",
1500                                 driver_info->vend_name);
1501 
1502                         DBG(HFCUSB_DBG_INIT,
1503                             "HFC-S USB: Endpoint-Config: %s (if=%d alt=%d), E-Channel(%d)",
1504                             conf_str[small_match], context->if_used,
1505                             context->alt_used,
1506                             validconf[small_match][18]);
1507 
1508                         /* init the chip and register the driver */
1509                         if (hfc_usb_init(context)) {
1510                                 usb_kill_urb(context->ctrl_urb);
1511                                 usb_free_urb(context->ctrl_urb);
1512                                 context->ctrl_urb = NULL;
1513                                 kfree(context);
1514                                 return (-EIO);
1515                         }
1516                         usb_set_intfdata(intf, context);
1517                         return (0);
1518                 }
1519         } else {
1520                 printk(KERN_INFO
1521                        "HFC-S USB: no valid vendor found in USB descriptor\n");
1522         }
1523         return (-EIO);
1524 }
1525 
1526 /* callback for unplugged USB device */
1527 static void
1528 hfc_usb_disconnect(struct usb_interface *intf)
1529 {
1530         hfcusb_data *context = usb_get_intfdata(intf);
1531         int i;
1532 
1533         handle_led(context, LED_POWER_OFF);
1534         schedule_timeout(HZ / 100);
1535 
1536         printk(KERN_INFO "HFC-S USB: device disconnect\n");
1537         context->disc_flag = 1;
1538         usb_set_intfdata(intf, NULL);
1539 
1540         if (timer_pending(&context->t3_timer))
1541                 del_timer(&context->t3_timer);
1542         if (timer_pending(&context->t4_timer))
1543                 del_timer(&context->t4_timer);
1544 
1545         /* tell all fifos to terminate */
1546         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1547                 if (context->fifos[i].usb_transfer_mode == USB_ISOC) {
1548                         if (context->fifos[i].active > 0) {
1549                                 stop_isoc_chain(&context->fifos[i]);
1550                                 DBG(HFCUSB_DBG_INIT,
1551                                     "HFC-S USB: %s stopping ISOC chain Fifo(%i)",
1552                                     __func__, i);
1553                         }
1554                 } else {
1555                         if (context->fifos[i].active > 0) {
1556                                 context->fifos[i].active = 0;
1557                                 DBG(HFCUSB_DBG_INIT,
1558                                     "HFC-S USB: %s unlinking URB for Fifo(%i)",
1559                                     __func__, i);
1560                         }
1561                         usb_kill_urb(context->fifos[i].urb);
1562                         usb_free_urb(context->fifos[i].urb);
1563                         context->fifos[i].urb = NULL;
1564                 }
1565                 context->fifos[i].active = 0;
1566         }
1567         usb_kill_urb(context->ctrl_urb);
1568         usb_free_urb(context->ctrl_urb);
1569         context->ctrl_urb = NULL;
1570         hisax_unregister(&context->d_if);
1571         kfree(context);         /* free our structure again */
1572 }
1573 
1574 static struct usb_driver hfc_drv = {
1575         .name  = "hfc_usb",
1576         .id_table = hfcusb_idtab,
1577         .probe = hfc_usb_probe,
1578         .disconnect = hfc_usb_disconnect,
1579         .disable_hub_initiated_lpm = 1,
1580 };
1581 
1582 static void __exit
1583 hfc_usb_mod_exit(void)
1584 {
1585         usb_deregister(&hfc_drv); /* release our driver */
1586         printk(KERN_INFO "HFC-S USB: module removed\n");
1587 }
1588 
1589 static int __init
1590 hfc_usb_mod_init(void)
1591 {
1592         char revstr[30], datestr[30], dummy[30];
1593 #ifndef CONFIG_HISAX_DEBUG
1594         hfc_debug = debug;
1595 #endif
1596         sscanf(hfcusb_revision,
1597                "%s %s $ %s %s %s $ ", dummy, revstr,
1598                dummy, datestr, dummy);
1599         printk(KERN_INFO
1600                "HFC-S USB: driver module revision %s date %s loaded, (debug=%i)\n",
1601                revstr, datestr, debug);
1602         if (usb_register(&hfc_drv)) {
1603                 printk(KERN_INFO
1604                        "HFC-S USB: Unable to register HFC-S USB module at usb stack\n");
1605                 return (-1);    /* unable to register */
1606         }
1607         return (0);
1608 }
1609 
1610 module_init(hfc_usb_mod_init);
1611 module_exit(hfc_usb_mod_exit);
1612 MODULE_AUTHOR(DRIVER_AUTHOR);
1613 MODULE_DESCRIPTION(DRIVER_DESC);
1614 MODULE_LICENSE("GPL");
1615 MODULE_DEVICE_TABLE(usb, hfcusb_idtab);
1616 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us