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