1 /******************************************************************************
2 * speedtouch.c - Alcatel SpeedTouch USB xDSL modem driver
4 * Copyright (C) 2001, Alcatel
5 * Copyright (C) 2003, Duncan Sands
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc., 59
19 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 ******************************************************************************/
24 * Written by Johan Verrept, maintained by Duncan Sands (duncan.sands@free.fr)
26 * 1.7+: - See the check-in logs
28 * 1.6: - No longer opens a connection if the firmware is not loaded
29 * - Added support for the speedtouch 330
30 * - Removed the limit on the number of devices
31 * - Module now autoloads on device plugin
32 * - Merged relevant parts of sarlib
33 * - Replaced the kernel thread with a tasklet
34 * - New packet transmission code
35 * - Changed proc file contents
36 * - Fixed all known SMP races
37 * - Many fixes and cleanups
38 * - Various fixes by Oliver Neukum (oliver@neukum.name)
40 * 1.5A: - Version for inclusion in 2.5 series kernel
41 * - Modifications by Richard Purdie (rpurdie@rpsys.net)
42 * - made compatible with kernel 2.5.6 onwards by changing
43 * udsl_usb_send_data_context->urb to a pointer and adding code
44 * to alloc and free it
45 * - remove_wait_queue() added to udsl_atm_processqueue_thread()
47 * 1.5: - fixed memory leak when atmsar_decode_aal5 returned NULL.
48 * (reported by stephen.robinson@zen.co.uk)
50 * 1.4: - changed the spin_lock() under interrupt to spin_lock_irqsave()
51 * - unlink all active send urbs of a vcc that is being closed.
53 * 1.3.1: - added the version number
55 * 1.3: - Added multiple send urb support
56 * - fixed memory leak and vcc->tx_inuse starvation bug
57 * when not enough memory left in vcc.
59 * 1.2: - Fixed race condition in udsl_usb_send_data()
60 * 1.1: - Turned off packet debugging
64 #include <asm/semaphore.h>
65 #include <linux/module.h>
66 #include <linux/moduleparam.h>
67 #include <linux/kernel.h>
68 #include <linux/sched.h>
69 #include <linux/timer.h>
70 #include <linux/errno.h>
71 #include <linux/proc_fs.h>
72 #include <linux/slab.h>
73 #include <linux/list.h>
74 #include <asm/uaccess.h>
75 #include <linux/smp_lock.h>
76 #include <linux/interrupt.h>
77 #include <linux/atm.h>
78 #include <linux/atmdev.h>
79 #include <linux/crc32.h>
80 #include <linux/init.h>
87 #include <linux/usb.h>
90 #define DEBUG_ON(x) BUG_ON(x)
92 #define DEBUG_ON(x) do { if (x); } while (0)
96 static int udsl_print_packet (const unsigned char *data, int len);
97 #define PACKETDEBUG(arg...) udsl_print_packet (arg)
98 #define vdbg(arg...) dbg (arg)
100 #define PACKETDEBUG(arg...)
104 #define DRIVER_AUTHOR "Johan Verrept, Duncan Sands <duncan.sands@free.fr>"
105 #define DRIVER_DESC "Alcatel SpeedTouch USB driver"
106 #define DRIVER_VERSION "1.7"
108 static const char udsl_driver_name [] = "speedtch";
110 #define SPEEDTOUCH_VENDORID 0x06b9
111 #define SPEEDTOUCH_PRODUCTID 0x4061
113 #define UDSL_MAX_RCV_URBS 4
114 #define UDSL_MAX_SND_URBS 4
115 #define UDSL_MAX_RCV_BUFS 8
116 #define UDSL_MAX_SND_BUFS 8
117 #define UDSL_MAX_RCV_BUF_SIZE 1024 /* ATM cells */
118 #define UDSL_MAX_SND_BUF_SIZE 1024 /* ATM cells */
119 #define UDSL_DEFAULT_RCV_URBS 2
120 #define UDSL_DEFAULT_SND_URBS 2
121 #define UDSL_DEFAULT_RCV_BUFS 4
122 #define UDSL_DEFAULT_SND_BUFS 4
123 #define UDSL_DEFAULT_RCV_BUF_SIZE 64 /* ATM cells */
124 #define UDSL_DEFAULT_SND_BUF_SIZE 64 /* ATM cells */
126 static unsigned int num_rcv_urbs = UDSL_DEFAULT_RCV_URBS;
127 static unsigned int num_snd_urbs = UDSL_DEFAULT_SND_URBS;
128 static unsigned int num_rcv_bufs = UDSL_DEFAULT_RCV_BUFS;
129 static unsigned int num_snd_bufs = UDSL_DEFAULT_SND_BUFS;
130 static unsigned int rcv_buf_size = UDSL_DEFAULT_RCV_BUF_SIZE;
131 static unsigned int snd_buf_size = UDSL_DEFAULT_SND_BUF_SIZE;
133 module_param (num_rcv_urbs, uint, 0444);
134 MODULE_PARM_DESC (num_rcv_urbs, "Number of urbs used for reception (range: 0-" __MODULE_STRING (UDSL_MAX_RCV_URBS) ", default: " __MODULE_STRING (UDSL_DEFAULT_RCV_URBS) ")");
136 module_param (num_snd_urbs, uint, 0444);
137 MODULE_PARM_DESC (num_snd_urbs, "Number of urbs used for transmission (range: 0-" __MODULE_STRING (UDSL_MAX_SND_URBS) ", default: " __MODULE_STRING (UDSL_DEFAULT_SND_URBS) ")");
139 module_param (num_rcv_bufs, uint, 0444);
140 MODULE_PARM_DESC (num_rcv_bufs, "Number of buffers used for reception (range: 0-" __MODULE_STRING (UDSL_MAX_RCV_BUFS) ", default: " __MODULE_STRING (UDSL_DEFAULT_RCV_BUFS) ")");
142 module_param (num_snd_bufs, uint, 0444);
143 MODULE_PARM_DESC (num_snd_bufs, "Number of buffers used for transmission (range: 0-" __MODULE_STRING (UDSL_MAX_SND_BUFS) ", default: " __MODULE_STRING (UDSL_DEFAULT_SND_BUFS) ")");
145 module_param (rcv_buf_size, uint, 0444);
146 MODULE_PARM_DESC (rcv_buf_size, "Size of the buffers used for reception (range: 0-" __MODULE_STRING (UDSL_MAX_RCV_BUF_SIZE) ", default: " __MODULE_STRING (UDSL_DEFAULT_RCV_BUF_SIZE) ")");
148 module_param (snd_buf_size, uint, 0444);
149 MODULE_PARM_DESC (snd_buf_size, "Size of the buffers used for transmission (range: 0-" __MODULE_STRING (UDSL_MAX_SND_BUF_SIZE) ", default: " __MODULE_STRING (UDSL_DEFAULT_SND_BUF_SIZE) ")");
151 #define UDSL_IOCTL_LINE_UP 1
152 #define UDSL_IOCTL_LINE_DOWN 2
154 #define UDSL_ENDPOINT_DATA_OUT 0x07
155 #define UDSL_ENDPOINT_DATA_IN 0x87
157 #define ATM_CELL_HEADER (ATM_CELL_SIZE - ATM_CELL_PAYLOAD)
158 #define UDSL_NUM_CELLS(x) (((x) + ATM_AAL5_TRAILER + ATM_CELL_PAYLOAD - 1) / ATM_CELL_PAYLOAD)
160 #define hex2int(c) ( (c >= '0') && (c <= '9') ? (c - '0') : ((c & 0xf) + 9) )
162 static struct usb_device_id udsl_usb_ids [] = {
163 { USB_DEVICE (SPEEDTOUCH_VENDORID, SPEEDTOUCH_PRODUCTID) },
167 MODULE_DEVICE_TABLE (usb, udsl_usb_ids);
171 struct udsl_receive_buffer {
172 struct list_head list;
174 unsigned int filled_cells;
177 struct udsl_receiver {
178 struct list_head list;
179 struct udsl_receive_buffer *buffer;
181 struct udsl_instance_data *instance;
184 struct udsl_vcc_data {
186 struct list_head list;
191 /* raw cell reassembly */
192 struct sk_buff *sarb;
197 struct udsl_send_buffer {
198 struct list_head list;
200 unsigned char *free_start;
201 unsigned int free_cells;
205 struct list_head list;
206 struct udsl_send_buffer *buffer;
208 struct udsl_instance_data *instance;
211 struct udsl_control {
212 struct atm_skb_data atm_data;
213 unsigned int num_cells;
214 unsigned int num_entire;
215 unsigned int pdu_padding;
216 unsigned char cell_header [ATM_CELL_HEADER];
217 unsigned char aal5_trailer [ATM_AAL5_TRAILER];
220 #define UDSL_SKB(x) ((struct udsl_control *)(x)->cb)
222 /* main driver data */
224 struct udsl_instance_data {
225 struct semaphore serialize;
227 /* USB device part */
228 struct usb_device *usb_dev;
229 char description [64];
232 /* ATM device part */
233 struct atm_dev *atm_dev;
234 struct list_head vcc_list;
237 struct udsl_receiver receivers [UDSL_MAX_RCV_URBS];
238 struct udsl_receive_buffer receive_buffers [UDSL_MAX_RCV_BUFS];
240 spinlock_t receive_lock;
241 struct list_head spare_receivers;
242 struct list_head filled_receive_buffers;
244 struct tasklet_struct receive_tasklet;
245 struct list_head spare_receive_buffers;
248 struct udsl_sender senders [UDSL_MAX_SND_URBS];
249 struct udsl_send_buffer send_buffers [UDSL_MAX_SND_BUFS];
251 struct sk_buff_head sndqueue;
253 spinlock_t send_lock;
254 struct list_head spare_senders;
255 struct list_head spare_send_buffers;
257 struct tasklet_struct send_tasklet;
258 struct sk_buff *current_skb; /* being emptied */
259 struct udsl_send_buffer *current_buffer; /* being filled */
260 struct list_head filled_send_buffers;
265 static void udsl_atm_dev_close (struct atm_dev *dev);
266 static int udsl_atm_open (struct atm_vcc *vcc);
267 static void udsl_atm_close (struct atm_vcc *vcc);
268 static int udsl_atm_ioctl (struct atm_dev *dev, unsigned int cmd, void *arg);
269 static int udsl_atm_send (struct atm_vcc *vcc, struct sk_buff *skb);
270 static int udsl_atm_proc_read (struct atm_dev *atm_dev, loff_t *pos, char *page);
272 static struct atmdev_ops udsl_atm_devops = {
273 .dev_close = udsl_atm_dev_close,
274 .open = udsl_atm_open,
275 .close = udsl_atm_close,
276 .ioctl = udsl_atm_ioctl,
277 .send = udsl_atm_send,
278 .proc_read = udsl_atm_proc_read,
279 .owner = THIS_MODULE,
284 static int udsl_usb_probe (struct usb_interface *intf, const struct usb_device_id *id);
285 static void udsl_usb_disconnect (struct usb_interface *intf);
286 static int udsl_usb_ioctl (struct usb_interface *intf, unsigned int code, void *user_data);
288 static struct usb_driver udsl_usb_driver = {
289 .owner = THIS_MODULE,
290 .name = udsl_driver_name,
291 .probe = udsl_usb_probe,
292 .disconnect = udsl_usb_disconnect,
293 .ioctl = udsl_usb_ioctl,
294 .id_table = udsl_usb_ids,
302 static inline struct udsl_vcc_data *udsl_find_vcc (struct udsl_instance_data *instance, short vpi, int vci)
304 struct udsl_vcc_data *vcc;
306 list_for_each_entry (vcc, &instance->vcc_list, list)
307 if ((vcc->vci == vci) && (vcc->vpi == vpi))
312 static void udsl_extract_cells (struct udsl_instance_data *instance, unsigned char *source, unsigned int howmany)
314 struct udsl_vcc_data *cached_vcc = NULL;
316 struct sk_buff *sarb;
317 struct udsl_vcc_data *vcc_data;
322 short cached_vpi = 0;
325 for (i = 0; i < howmany; i++, source += ATM_CELL_SIZE) {
326 vpi = ((source [0] & 0x0f) << 4) | (source [1] >> 4);
327 vci = ((source [1] & 0x0f) << 12) | (source [2] << 4) | (source [3] >> 4);
328 pti = (source [3] & 0x2) != 0;
330 vdbg ("udsl_extract_cells: vpi %hd, vci %d, pti %d", vpi, vci, pti);
332 if (cached_vcc && (vci == cached_vci) && (vpi == cached_vpi))
333 vcc_data = cached_vcc;
334 else if ((vcc_data = udsl_find_vcc (instance, vpi, vci))) {
335 cached_vcc = vcc_data;
339 dbg ("udsl_extract_cells: unknown vpi/vci (%hd/%d)!", vpi, vci);
344 sarb = vcc_data->sarb;
346 if (sarb->tail + ATM_CELL_PAYLOAD > sarb->end) {
347 dbg ("udsl_extract_cells: buffer overrun (sarb->len %u, vcc: 0x%p)!", sarb->len, vcc);
348 /* discard cells already received */
352 memcpy (sarb->tail, source + ATM_CELL_HEADER, ATM_CELL_PAYLOAD);
353 __skb_put (sarb, ATM_CELL_PAYLOAD);
358 unsigned int pdu_length;
360 length = (source [ATM_CELL_SIZE - 6] << 8) + source [ATM_CELL_SIZE - 5];
362 /* guard against overflow */
363 if (length > ATM_MAX_AAL5_PDU) {
364 dbg ("udsl_extract_cells: bogus length %u (vcc: 0x%p)!", length, vcc);
365 atomic_inc (&vcc->stats->rx_err);
369 pdu_length = UDSL_NUM_CELLS (length) * ATM_CELL_PAYLOAD;
371 if (sarb->len < pdu_length) {
372 dbg ("udsl_extract_cells: bogus pdu_length %u (sarb->len: %u, vcc: 0x%p)!", pdu_length, sarb->len, vcc);
373 atomic_inc (&vcc->stats->rx_err);
377 if (crc32_be (~0, sarb->tail - pdu_length, pdu_length) != 0xc704dd7b) {
378 dbg ("udsl_extract_cells: packet failed crc check (vcc: 0x%p)!", vcc);
379 atomic_inc (&vcc->stats->rx_err);
383 vdbg ("udsl_extract_cells: got packet (length: %u, pdu_length: %u, vcc: 0x%p)", length, pdu_length, vcc);
385 if (!(skb = dev_alloc_skb (length))) {
386 dbg ("udsl_extract_cells: no memory for skb (length: %u)!", length);
387 atomic_inc (&vcc->stats->rx_drop);
391 vdbg ("udsl_extract_cells: allocated new sk_buff (skb: 0x%p, skb->truesize: %u)", skb, skb->truesize);
393 if (!atm_charge (vcc, skb->truesize)) {
394 dbg ("udsl_extract_cells: failed atm_charge (skb->truesize: %u)!", skb->truesize);
396 goto out; /* atm_charge increments rx_drop */
399 memcpy (skb->data, sarb->tail - pdu_length, length);
400 __skb_put (skb, length);
402 vdbg ("udsl_extract_cells: sending skb 0x%p, skb->len %u, skb->truesize %u", skb, skb->len, skb->truesize);
404 PACKETDEBUG (skb->data, skb->len);
406 vcc->push (vcc, skb);
408 atomic_inc (&vcc->stats->rx);
420 static const unsigned char zeros [ATM_CELL_PAYLOAD];
422 static void udsl_groom_skb (struct atm_vcc *vcc, struct sk_buff *skb)
424 struct udsl_control *ctrl = UDSL_SKB (skb);
425 unsigned int zero_padding;
428 ctrl->atm_data.vcc = vcc;
429 ctrl->cell_header [0] = vcc->vpi >> 4;
430 ctrl->cell_header [1] = (vcc->vpi << 4) | (vcc->vci >> 12);
431 ctrl->cell_header [2] = vcc->vci >> 4;
432 ctrl->cell_header [3] = vcc->vci << 4;
433 ctrl->cell_header [4] = 0xec;
435 ctrl->num_cells = UDSL_NUM_CELLS (skb->len);
436 ctrl->num_entire = skb->len / ATM_CELL_PAYLOAD;
438 zero_padding = ctrl->num_cells * ATM_CELL_PAYLOAD - skb->len - ATM_AAL5_TRAILER;
440 if (ctrl->num_entire + 1 < ctrl->num_cells)
441 ctrl->pdu_padding = zero_padding - (ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER);
443 ctrl->pdu_padding = zero_padding;
445 ctrl->aal5_trailer [0] = 0; /* UU = 0 */
446 ctrl->aal5_trailer [1] = 0; /* CPI = 0 */
447 ctrl->aal5_trailer [2] = skb->len >> 8;
448 ctrl->aal5_trailer [3] = skb->len;
450 crc = crc32_be (~0, skb->data, skb->len);
451 crc = crc32_be (crc, zeros, zero_padding);
452 crc = crc32_be (crc, ctrl->aal5_trailer, 4);
455 ctrl->aal5_trailer [4] = crc >> 24;
456 ctrl->aal5_trailer [5] = crc >> 16;
457 ctrl->aal5_trailer [6] = crc >> 8;
458 ctrl->aal5_trailer [7] = crc;
461 static unsigned int udsl_write_cells (unsigned int howmany, struct sk_buff *skb, unsigned char **target_p)
463 struct udsl_control *ctrl = UDSL_SKB (skb);
464 unsigned char *target = *target_p;
465 unsigned int nc, ne, i;
467 vdbg ("udsl_write_cells: howmany=%u, skb->len=%d, num_cells=%u, num_entire=%u, pdu_padding=%u", howmany, skb->len, ctrl->num_cells, ctrl->num_entire, ctrl->pdu_padding);
469 nc = ctrl->num_cells;
470 ne = min (howmany, ctrl->num_entire);
472 for (i = 0; i < ne; i++) {
473 memcpy (target, ctrl->cell_header, ATM_CELL_HEADER);
474 target += ATM_CELL_HEADER;
475 memcpy (target, skb->data, ATM_CELL_PAYLOAD);
476 target += ATM_CELL_PAYLOAD;
477 __skb_pull (skb, ATM_CELL_PAYLOAD);
480 ctrl->num_entire -= ne;
482 if (!(ctrl->num_cells -= ne) || !(howmany -= ne))
485 memcpy (target, ctrl->cell_header, ATM_CELL_HEADER);
486 target += ATM_CELL_HEADER;
487 memcpy (target, skb->data, skb->len);
489 __skb_pull (skb, skb->len);
490 memset (target, 0, ctrl->pdu_padding);
491 target += ctrl->pdu_padding;
493 if (--ctrl->num_cells) {
495 ctrl->pdu_padding = ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER;
499 memcpy (target, ctrl->cell_header, ATM_CELL_HEADER);
500 target += ATM_CELL_HEADER;
501 memset (target, 0, ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER);
502 target += ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER;
504 DEBUG_ON (--ctrl->num_cells);
507 memcpy (target, ctrl->aal5_trailer, ATM_AAL5_TRAILER);
508 target += ATM_AAL5_TRAILER;
509 /* set pti bit in last cell */
510 *(target + 3 - ATM_CELL_SIZE) |= 0x2;
514 return nc - ctrl->num_cells;
522 static void udsl_complete_receive (struct urb *urb, struct pt_regs *regs)
524 struct udsl_receive_buffer *buf;
525 struct udsl_instance_data *instance;
526 struct udsl_receiver *rcv;
529 if (!urb || !(rcv = urb->context)) {
530 dbg ("udsl_complete_receive: bad urb!");
534 instance = rcv->instance;
537 buf->filled_cells = urb->actual_length / ATM_CELL_SIZE;
539 vdbg ("udsl_complete_receive: urb 0x%p, status %d, actual_length %d, filled_cells %u, rcv 0x%p, buf 0x%p", urb, urb->status, urb->actual_length, buf->filled_cells, rcv, buf);
541 DEBUG_ON (buf->filled_cells > rcv_buf_size);
543 /* may not be in_interrupt() */
544 spin_lock_irqsave (&instance->receive_lock, flags);
545 list_add (&rcv->list, &instance->spare_receivers);
546 list_add_tail (&buf->list, &instance->filled_receive_buffers);
547 if (likely (!urb->status))
548 tasklet_schedule (&instance->receive_tasklet);
549 spin_unlock_irqrestore (&instance->receive_lock, flags);
552 static void udsl_process_receive (unsigned long data)
554 struct udsl_receive_buffer *buf;
555 struct udsl_instance_data *instance = (struct udsl_instance_data *) data;
556 struct udsl_receiver *rcv;
560 while (!list_empty (&instance->spare_receive_buffers)) {
561 spin_lock_irq (&instance->receive_lock);
562 if (list_empty (&instance->spare_receivers)) {
563 spin_unlock_irq (&instance->receive_lock);
566 rcv = list_entry (instance->spare_receivers.next, struct udsl_receiver, list);
567 list_del (&rcv->list);
568 spin_unlock_irq (&instance->receive_lock);
570 buf = list_entry (instance->spare_receive_buffers.next, struct udsl_receive_buffer, list);
571 list_del (&buf->list);
575 usb_fill_bulk_urb (rcv->urb,
577 usb_rcvbulkpipe (instance->usb_dev, UDSL_ENDPOINT_DATA_IN),
579 rcv_buf_size * ATM_CELL_SIZE,
580 udsl_complete_receive,
583 vdbg ("udsl_process_receive: sending urb 0x%p, rcv 0x%p, buf 0x%p", rcv->urb, rcv, buf);
585 if ((err = usb_submit_urb(rcv->urb, GFP_ATOMIC)) < 0) {
586 dbg ("udsl_process_receive: urb submission failed (%d)!", err);
587 list_add (&buf->list, &instance->spare_receive_buffers);
588 spin_lock_irq (&instance->receive_lock);
589 list_add (&rcv->list, &instance->spare_receivers);
590 spin_unlock_irq (&instance->receive_lock);
595 spin_lock_irq (&instance->receive_lock);
596 if (list_empty (&instance->filled_receive_buffers)) {
597 spin_unlock_irq (&instance->receive_lock);
598 return; /* done - no more buffers */
600 buf = list_entry (instance->filled_receive_buffers.next, struct udsl_receive_buffer, list);
601 list_del (&buf->list);
602 spin_unlock_irq (&instance->receive_lock);
603 vdbg ("udsl_process_receive: processing buf 0x%p", buf);
604 udsl_extract_cells (instance, buf->base, buf->filled_cells);
605 list_add (&buf->list, &instance->spare_receive_buffers);
614 static void udsl_complete_send (struct urb *urb, struct pt_regs *regs)
616 struct udsl_instance_data *instance;
617 struct udsl_sender *snd;
620 if (!urb || !(snd = urb->context) || !(instance = snd->instance)) {
621 dbg ("udsl_complete_send: bad urb!");
625 vdbg ("udsl_complete_send: urb 0x%p, status %d, snd 0x%p, buf 0x%p", urb, urb->status, snd, snd->buffer);
627 /* may not be in_interrupt() */
628 spin_lock_irqsave (&instance->send_lock, flags);
629 list_add (&snd->list, &instance->spare_senders);
630 list_add (&snd->buffer->list, &instance->spare_send_buffers);
631 tasklet_schedule (&instance->send_tasklet);
632 spin_unlock_irqrestore (&instance->send_lock, flags);
635 static void udsl_process_send (unsigned long data)
637 struct udsl_send_buffer *buf;
638 struct udsl_instance_data *instance = (struct udsl_instance_data *) data;
640 struct udsl_sender *snd;
642 unsigned int num_written;
645 spin_lock_irq (&instance->send_lock);
646 while (!list_empty (&instance->spare_senders)) {
647 if (!list_empty (&instance->filled_send_buffers)) {
648 buf = list_entry (instance->filled_send_buffers.next, struct udsl_send_buffer, list);
649 list_del (&buf->list);
650 } else if ((buf = instance->current_buffer)) {
651 instance->current_buffer = NULL;
652 } else /* all buffers empty */
655 snd = list_entry (instance->spare_senders.next, struct udsl_sender, list);
656 list_del (&snd->list);
657 spin_unlock_irq (&instance->send_lock);
660 usb_fill_bulk_urb (snd->urb,
662 usb_sndbulkpipe (instance->usb_dev, UDSL_ENDPOINT_DATA_OUT),
664 (snd_buf_size - buf->free_cells) * ATM_CELL_SIZE,
668 vdbg ("udsl_process_send: submitting urb 0x%p (%d cells), snd 0x%p, buf 0x%p", snd->urb, snd_buf_size - buf->free_cells, snd, buf);
670 if ((err = usb_submit_urb(snd->urb, GFP_ATOMIC)) < 0) {
671 dbg ("udsl_process_send: urb submission failed (%d)!", err);
672 spin_lock_irq (&instance->send_lock);
673 list_add (&snd->list, &instance->spare_senders);
674 spin_unlock_irq (&instance->send_lock);
675 list_add (&buf->list, &instance->filled_send_buffers);
676 return; /* bail out */
679 spin_lock_irq (&instance->send_lock);
681 spin_unlock_irq (&instance->send_lock);
683 if (!instance->current_skb && !(instance->current_skb = skb_dequeue (&instance->sndqueue)))
684 return; /* done - no more skbs */
686 skb = instance->current_skb;
688 if (!(buf = instance->current_buffer)) {
689 spin_lock_irq (&instance->send_lock);
690 if (list_empty (&instance->spare_send_buffers)) {
691 instance->current_buffer = NULL;
692 spin_unlock_irq (&instance->send_lock);
693 return; /* done - no more buffers */
695 buf = list_entry (instance->spare_send_buffers.next, struct udsl_send_buffer, list);
696 list_del (&buf->list);
697 spin_unlock_irq (&instance->send_lock);
699 buf->free_start = buf->base;
700 buf->free_cells = snd_buf_size;
702 instance->current_buffer = buf;
705 num_written = udsl_write_cells (buf->free_cells, skb, &buf->free_start);
707 vdbg ("udsl_process_send: wrote %u cells from skb 0x%p to buffer 0x%p", num_written, skb, buf);
709 if (!(buf->free_cells -= num_written)) {
710 list_add_tail (&buf->list, &instance->filled_send_buffers);
711 instance->current_buffer = NULL;
714 vdbg ("udsl_process_send: buffer contains %d cells, %d left", snd_buf_size - buf->free_cells, buf->free_cells);
716 if (!UDSL_SKB (skb)->num_cells) {
717 struct atm_vcc *vcc = UDSL_SKB (skb)->atm_data.vcc;
723 instance->current_skb = NULL;
725 atomic_inc (&vcc->stats->tx);
731 static void udsl_cancel_send (struct udsl_instance_data *instance, struct atm_vcc *vcc)
733 struct sk_buff *skb, *n;
735 dbg ("udsl_cancel_send entered");
736 spin_lock_irq (&instance->sndqueue.lock);
737 for (skb = instance->sndqueue.next, n = skb->next; skb != (struct sk_buff *)&instance->sndqueue; skb = n, n = skb->next)
738 if (UDSL_SKB (skb)->atm_data.vcc == vcc) {
739 dbg ("udsl_cancel_send: popping skb 0x%p", skb);
740 __skb_unlink (skb, &instance->sndqueue);
746 spin_unlock_irq (&instance->sndqueue.lock);
748 tasklet_disable (&instance->send_tasklet);
749 if ((skb = instance->current_skb) && (UDSL_SKB (skb)->atm_data.vcc == vcc)) {
750 dbg ("udsl_cancel_send: popping current skb (0x%p)", skb);
751 instance->current_skb = NULL;
757 tasklet_enable (&instance->send_tasklet);
758 dbg ("udsl_cancel_send done");
761 static int udsl_atm_send (struct atm_vcc *vcc, struct sk_buff *skb)
763 struct udsl_instance_data *instance = vcc->dev->dev_data;
765 vdbg ("udsl_atm_send called (skb 0x%p, len %u)", skb, skb->len);
767 if (!instance || !instance->usb_dev) {
768 dbg ("udsl_atm_send: NULL data!");
772 if (vcc->qos.aal != ATM_AAL5) {
773 dbg ("udsl_atm_send: unsupported ATM type %d!", vcc->qos.aal);
777 if (skb->len > ATM_MAX_AAL5_PDU) {
778 dbg ("udsl_atm_send: packet too long (%d vs %d)!", skb->len, ATM_MAX_AAL5_PDU);
782 PACKETDEBUG (skb->data, skb->len);
784 udsl_groom_skb (vcc, skb);
785 skb_queue_tail (&instance->sndqueue, skb);
786 tasklet_schedule (&instance->send_tasklet);
796 static void udsl_atm_dev_close (struct atm_dev *dev)
798 struct udsl_instance_data *instance = dev->dev_data;
801 dbg ("udsl_atm_dev_close: NULL instance!");
805 dbg ("udsl_atm_dev_close: queue has %u elements", instance->sndqueue.qlen);
807 tasklet_kill (&instance->receive_tasklet);
808 tasklet_kill (&instance->send_tasklet);
810 dev->dev_data = NULL;
813 static int udsl_atm_proc_read (struct atm_dev *atm_dev, loff_t *pos, char *page)
815 struct udsl_instance_data *instance = atm_dev->dev_data;
819 dbg ("udsl_atm_proc_read: NULL instance!");
824 return sprintf (page, "%s\n", instance->description);
827 return sprintf (page, "MAC: %02x:%02x:%02x:%02x:%02x:%02x\n",
828 atm_dev->esi [0], atm_dev->esi [1], atm_dev->esi [2],
829 atm_dev->esi [3], atm_dev->esi [4], atm_dev->esi [5]);
832 return sprintf (page, "AAL5: tx %d ( %d err ), rx %d ( %d err, %d drop )\n",
833 atomic_read (&atm_dev->stats.aal5.tx),
834 atomic_read (&atm_dev->stats.aal5.tx_err),
835 atomic_read (&atm_dev->stats.aal5.rx),
836 atomic_read (&atm_dev->stats.aal5.rx_err),
837 atomic_read (&atm_dev->stats.aal5.rx_drop));
840 switch (atm_dev->signal) {
841 case ATM_PHY_SIG_FOUND:
842 sprintf (page, "Line up");
844 case ATM_PHY_SIG_LOST:
845 sprintf (page, "Line down");
848 sprintf (page, "Line state unknown");
852 if (instance->usb_dev) {
853 if (!instance->firmware_loaded)
854 strcat (page, ", no firmware\n");
856 strcat (page, ", firmware loaded\n");
858 strcat (page, ", disconnected\n");
860 return strlen (page);
866 static int udsl_atm_open (struct atm_vcc *vcc)
868 struct udsl_instance_data *instance = vcc->dev->dev_data;
869 struct udsl_vcc_data *new;
870 unsigned int max_pdu;
872 short vpi = vcc->vpi;
874 dbg ("udsl_atm_open: vpi %hd, vci %d", vpi, vci);
876 if (!instance || !instance->usb_dev) {
877 dbg ("udsl_atm_open: NULL data!");
881 /* only support AAL5 */
882 if ((vcc->qos.aal != ATM_AAL5) || (vcc->qos.rxtp.max_sdu < 0) || (vcc->qos.rxtp.max_sdu > ATM_MAX_AAL5_PDU)) {
883 dbg ("udsl_atm_open: unsupported ATM type %d!", vcc->qos.aal);
887 if (!instance->firmware_loaded) {
888 dbg ("udsl_atm_open: firmware not loaded!");
892 down (&instance->serialize); /* vs self, udsl_atm_close */
894 if (udsl_find_vcc (instance, vpi, vci)) {
895 dbg ("udsl_atm_open: %hd/%d already in use!", vpi, vci);
896 up (&instance->serialize);
900 if (!(new = kmalloc (sizeof (struct udsl_vcc_data), GFP_KERNEL))) {
901 dbg ("udsl_atm_open: no memory for vcc_data!");
902 up (&instance->serialize);
906 memset (new, 0, sizeof (struct udsl_vcc_data));
911 /* udsl_extract_cells requires at least one cell */
912 max_pdu = max (1, UDSL_NUM_CELLS (vcc->qos.rxtp.max_sdu)) * ATM_CELL_PAYLOAD;
913 if (!(new->sarb = alloc_skb (max_pdu, GFP_KERNEL))) {
914 dbg ("udsl_atm_open: no memory for SAR buffer!");
916 up (&instance->serialize);
922 tasklet_disable (&instance->receive_tasklet);
923 list_add (&new->list, &instance->vcc_list);
924 tasklet_enable (&instance->receive_tasklet);
926 set_bit (ATM_VF_ADDR, &vcc->flags);
927 set_bit (ATM_VF_PARTIAL, &vcc->flags);
928 set_bit (ATM_VF_READY, &vcc->flags);
930 up (&instance->serialize);
932 tasklet_schedule (&instance->receive_tasklet);
934 dbg ("udsl_atm_open: allocated vcc data 0x%p (max_pdu: %u)", new, max_pdu);
939 static void udsl_atm_close (struct atm_vcc *vcc)
941 struct udsl_instance_data *instance = vcc->dev->dev_data;
942 struct udsl_vcc_data *vcc_data = vcc->dev_data;
944 dbg ("udsl_atm_close called");
946 if (!instance || !vcc_data) {
947 dbg ("udsl_atm_close: NULL data!");
951 dbg ("udsl_atm_close: deallocating vcc 0x%p with vpi %d vci %d", vcc_data, vcc_data->vpi, vcc_data->vci);
953 udsl_cancel_send (instance, vcc);
955 down (&instance->serialize); /* vs self, udsl_atm_open */
957 tasklet_disable (&instance->receive_tasklet);
958 list_del (&vcc_data->list);
959 tasklet_enable (&instance->receive_tasklet);
961 kfree_skb (vcc_data->sarb);
962 vcc_data->sarb = NULL;
965 vcc->dev_data = NULL;
967 vcc->vpi = ATM_VPI_UNSPEC;
968 vcc->vci = ATM_VCI_UNSPEC;
969 clear_bit (ATM_VF_READY, &vcc->flags);
970 clear_bit (ATM_VF_PARTIAL, &vcc->flags);
971 clear_bit (ATM_VF_ADDR, &vcc->flags);
973 up (&instance->serialize);
975 dbg ("udsl_atm_close successful");
978 static int udsl_atm_ioctl (struct atm_dev *dev, unsigned int cmd, void *arg)
982 return put_user (ATM_LM_NONE, (int *) arg) ? -EFAULT : 0;
993 static int udsl_set_alternate (struct udsl_instance_data *instance)
995 down (&instance->serialize); /* vs self */
996 if (!instance->firmware_loaded) {
999 if ((ret = usb_set_interface (instance->usb_dev, 1, 1)) < 0) {
1000 dbg ("udsl_set_alternate: usb_set_interface returned %d!", ret);
1001 up (&instance->serialize);
1004 instance->firmware_loaded = 1;
1006 up (&instance->serialize);
1008 tasklet_schedule (&instance->receive_tasklet);
1013 static int udsl_usb_ioctl (struct usb_interface *intf, unsigned int code, void *user_data)
1015 struct udsl_instance_data *instance = usb_get_intfdata (intf);
1017 dbg ("udsl_usb_ioctl entered");
1020 dbg ("udsl_usb_ioctl: NULL instance!");
1025 case UDSL_IOCTL_LINE_UP:
1026 instance->atm_dev->signal = ATM_PHY_SIG_FOUND;
1027 return udsl_set_alternate (instance);
1028 case UDSL_IOCTL_LINE_DOWN:
1029 instance->atm_dev->signal = ATM_PHY_SIG_LOST;
1036 static int udsl_usb_probe (struct usb_interface *intf, const struct usb_device_id *id)
1038 struct usb_device *dev = interface_to_usbdev(intf);
1039 int ifnum = intf->altsetting->desc.bInterfaceNumber;
1040 struct udsl_instance_data *instance;
1041 unsigned char mac_str [13];
1045 dbg ("udsl_usb_probe: trying device with vendor=0x%x, product=0x%x, ifnum %d",
1046 dev->descriptor.idVendor, dev->descriptor.idProduct, ifnum);
1048 if ((dev->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) ||
1049 (dev->descriptor.idVendor != SPEEDTOUCH_VENDORID) ||
1050 (dev->descriptor.idProduct != SPEEDTOUCH_PRODUCTID) || (ifnum != 1))
1053 dbg ("udsl_usb_probe: device accepted");
1056 if (!(instance = kmalloc (sizeof (struct udsl_instance_data), GFP_KERNEL))) {
1057 dbg ("udsl_usb_probe: no memory for instance data!");
1061 memset (instance, 0, sizeof (struct udsl_instance_data));
1063 init_MUTEX (&instance->serialize);
1065 instance->usb_dev = dev;
1067 INIT_LIST_HEAD (&instance->vcc_list);
1069 spin_lock_init (&instance->receive_lock);
1070 INIT_LIST_HEAD (&instance->spare_receivers);
1071 INIT_LIST_HEAD (&instance->filled_receive_buffers);
1073 tasklet_init (&instance->receive_tasklet, udsl_process_receive, (unsigned long) instance);
1074 INIT_LIST_HEAD (&instance->spare_receive_buffers);
1076 skb_queue_head_init (&instance->sndqueue);
1078 spin_lock_init (&instance->send_lock);
1079 INIT_LIST_HEAD (&instance->spare_senders);
1080 INIT_LIST_HEAD (&instance->spare_send_buffers);
1082 tasklet_init (&instance->send_tasklet, udsl_process_send, (unsigned long) instance);
1083 INIT_LIST_HEAD (&instance->filled_send_buffers);
1086 for (i = 0; i < num_rcv_urbs; i++) {
1087 struct udsl_receiver *rcv = &(instance->receivers [i]);
1089 if (!(rcv->urb = usb_alloc_urb (0, GFP_KERNEL))) {
1090 dbg ("udsl_usb_probe: no memory for receive urb %d!", i);
1094 rcv->instance = instance;
1096 list_add (&rcv->list, &instance->spare_receivers);
1099 for (i = 0; i < num_rcv_bufs; i++) {
1100 struct udsl_receive_buffer *buf = &(instance->receive_buffers [i]);
1102 if (!(buf->base = kmalloc (rcv_buf_size * ATM_CELL_SIZE, GFP_KERNEL))) {
1103 dbg ("udsl_usb_probe: no memory for receive buffer %d!", i);
1107 list_add (&buf->list, &instance->spare_receive_buffers);
1111 for (i = 0; i < num_snd_urbs; i++) {
1112 struct udsl_sender *snd = &(instance->senders [i]);
1114 if (!(snd->urb = usb_alloc_urb (0, GFP_KERNEL))) {
1115 dbg ("udsl_usb_probe: no memory for send urb %d!", i);
1119 snd->instance = instance;
1121 list_add (&snd->list, &instance->spare_senders);
1124 for (i = 0; i < num_snd_bufs; i++) {
1125 struct udsl_send_buffer *buf = &(instance->send_buffers [i]);
1127 if (!(buf->base = kmalloc (snd_buf_size * ATM_CELL_SIZE, GFP_KERNEL))) {
1128 dbg ("udsl_usb_probe: no memory for send buffer %d!", i);
1132 list_add (&buf->list, &instance->spare_send_buffers);
1136 if (!(instance->atm_dev = atm_dev_register (udsl_driver_name, &udsl_atm_devops, -1, 0))) {
1137 dbg ("udsl_usb_probe: failed to register ATM device!");
1141 instance->atm_dev->ci_range.vpi_bits = ATM_CI_MAX;
1142 instance->atm_dev->ci_range.vci_bits = ATM_CI_MAX;
1143 instance->atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
1145 /* temp init ATM device, set to 128kbit */
1146 instance->atm_dev->link_rate = 128 * 1000 / 424;
1148 /* set MAC address, it is stored in the serial number */
1149 memset (instance->atm_dev->esi, 0, sizeof (instance->atm_dev->esi));
1150 if (usb_string (dev, dev->descriptor.iSerialNumber, mac_str, sizeof (mac_str)) == 12)
1151 for (i = 0; i < 6; i++)
1152 instance->atm_dev->esi [i] = (hex2int (mac_str [i * 2]) * 16) + (hex2int (mac_str [i * 2 + 1]));
1154 /* device description */
1155 buf = instance->description;
1156 length = sizeof (instance->description);
1158 if ((i = usb_string (dev, dev->descriptor.iProduct, buf, length)) < 0)
1164 i = scnprintf (buf, length, " (");
1168 if (length <= 0 || (i = usb_make_path (dev, buf, length)) < 0)
1174 snprintf (buf, length, ")");
1177 /* ready for ATM callbacks */
1179 instance->atm_dev->dev_data = instance;
1181 usb_set_intfdata (intf, instance);
1186 for (i = 0; i < num_snd_bufs; i++)
1187 kfree (instance->send_buffers [i].base);
1189 for (i = 0; i < num_snd_urbs; i++)
1190 usb_free_urb (instance->senders [i].urb);
1192 for (i = 0; i < num_rcv_bufs; i++)
1193 kfree (instance->receive_buffers [i].base);
1195 for (i = 0; i < num_rcv_urbs; i++)
1196 usb_free_urb (instance->receivers [i].urb);
1203 static void udsl_usb_disconnect (struct usb_interface *intf)
1205 struct udsl_instance_data *instance = usb_get_intfdata (intf);
1206 struct list_head *pos;
1210 dbg ("udsl_usb_disconnect entered");
1212 usb_set_intfdata (intf, NULL);
1215 dbg ("udsl_usb_disconnect: NULL instance!");
1219 /* receive finalize */
1220 tasklet_disable (&instance->receive_tasklet);
1222 for (i = 0; i < num_rcv_urbs; i++)
1223 if ((result = usb_unlink_urb (instance->receivers [i].urb)) < 0)
1224 dbg ("udsl_usb_disconnect: usb_unlink_urb on receive urb %d returned %d!", i, result);
1226 /* wait for completion handlers to finish */
1229 spin_lock_irq (&instance->receive_lock);
1230 list_for_each (pos, &instance->spare_receivers)
1231 DEBUG_ON (++count > num_rcv_urbs);
1232 spin_unlock_irq (&instance->receive_lock);
1234 dbg ("udsl_usb_disconnect: found %u spare receivers", count);
1236 if (count == num_rcv_urbs)
1239 set_current_state (TASK_RUNNING);
1243 /* no need to take the spinlock */
1244 INIT_LIST_HEAD (&instance->filled_receive_buffers);
1245 INIT_LIST_HEAD (&instance->spare_receive_buffers);
1247 tasklet_enable (&instance->receive_tasklet);
1249 for (i = 0; i < num_rcv_urbs; i++)
1250 usb_free_urb (instance->receivers [i].urb);
1252 for (i = 0; i < num_rcv_bufs; i++)
1253 kfree (instance->receive_buffers [i].base);
1256 tasklet_disable (&instance->send_tasklet);
1258 for (i = 0; i < num_snd_urbs; i++)
1259 if ((result = usb_unlink_urb (instance->senders [i].urb)) < 0)
1260 dbg ("udsl_usb_disconnect: usb_unlink_urb on send urb %d returned %d!", i, result);
1262 /* wait for completion handlers to finish */
1265 spin_lock_irq (&instance->send_lock);
1266 list_for_each (pos, &instance->spare_senders)
1267 DEBUG_ON (++count > num_snd_urbs);
1268 spin_unlock_irq (&instance->send_lock);
1270 dbg ("udsl_usb_disconnect: found %u spare senders", count);
1272 if (count == num_snd_urbs)
1275 set_current_state (TASK_RUNNING);
1279 /* no need to take the spinlock */
1280 INIT_LIST_HEAD (&instance->spare_senders);
1281 INIT_LIST_HEAD (&instance->spare_send_buffers);
1282 instance->current_buffer = NULL;
1284 tasklet_enable (&instance->send_tasklet);
1286 for (i = 0; i < num_snd_urbs; i++)
1287 usb_free_urb (instance->senders [i].urb);
1289 for (i = 0; i < num_snd_bufs; i++)
1290 kfree (instance->send_buffers [i].base);
1293 instance->usb_dev = NULL;
1296 shutdown_atm_dev (instance->atm_dev); /* frees instance, kills tasklets */
1304 static int __init udsl_usb_init (void)
1306 dbg ("udsl_usb_init: driver version " DRIVER_VERSION);
1308 if (sizeof (struct udsl_control) > sizeof (((struct sk_buff *)0)->cb)) {
1309 printk (KERN_ERR __FILE__ ": unusable with this kernel!\n");
1313 if ((num_rcv_urbs > UDSL_MAX_RCV_URBS) || (num_snd_urbs > UDSL_MAX_SND_URBS) ||
1314 (num_rcv_bufs > UDSL_MAX_RCV_BUFS) || (num_snd_bufs > UDSL_MAX_SND_BUFS) ||
1315 (rcv_buf_size > UDSL_MAX_RCV_BUF_SIZE) || (snd_buf_size > UDSL_MAX_SND_BUF_SIZE))
1318 return usb_register (&udsl_usb_driver);
1321 static void __exit udsl_usb_cleanup (void)
1323 dbg ("udsl_usb_cleanup entered");
1325 usb_deregister (&udsl_usb_driver);
1328 module_init (udsl_usb_init);
1329 module_exit (udsl_usb_cleanup);
1331 MODULE_AUTHOR (DRIVER_AUTHOR);
1332 MODULE_DESCRIPTION (DRIVER_DESC);
1333 MODULE_LICENSE ("GPL");
1340 #ifdef VERBOSE_DEBUG
1341 static int udsl_print_packet (const unsigned char *data, int len)
1343 unsigned char buffer [256];
1346 for (i = 0; i < len;) {
1348 sprintf (buffer, "%.3d :", i);
1349 for (j = 0; (j < 16) && (i < len); j++, i++) {
1350 sprintf (buffer, "%s %2.2x", buffer, data [i]);