Loading...
1/******************************************************************************
2 * cxacru.c - driver for USB ADSL modems based on
3 * Conexant AccessRunner chipset
4 *
5 * Copyright (C) 2004 David Woodhouse, Duncan Sands, Roman Kagan
6 * Copyright (C) 2005 Duncan Sands, Roman Kagan (rkagan % mail ! ru)
7 * Copyright (C) 2007 Simon Arlott
8 * Copyright (C) 2009 Simon Arlott
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the Free
12 * Software Foundation; either version 2 of the License, or (at your option)
13 * any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
18 * more details.
19 *
20 * You should have received a copy of the GNU General Public License along with
21 * this program; if not, write to the Free Software Foundation, Inc., 59
22 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 *
24 ******************************************************************************/
25
26/*
27 * Credit is due for Josep Comas, who created the original patch to speedtch.c
28 * to support the different padding used by the AccessRunner (now generalized
29 * into usbatm), and the userspace firmware loading utility.
30 */
31
32#include <linux/module.h>
33#include <linux/moduleparam.h>
34#include <linux/kernel.h>
35#include <linux/timer.h>
36#include <linux/errno.h>
37#include <linux/slab.h>
38#include <linux/init.h>
39#include <linux/device.h>
40#include <linux/firmware.h>
41#include <linux/mutex.h>
42#include <asm/unaligned.h>
43
44#include "usbatm.h"
45
46#define DRIVER_AUTHOR "Roman Kagan, David Woodhouse, Duncan Sands, Simon Arlott"
47#define DRIVER_VERSION "0.4"
48#define DRIVER_DESC "Conexant AccessRunner ADSL USB modem driver"
49
50static const char cxacru_driver_name[] = "cxacru";
51
52#define CXACRU_EP_CMD 0x01 /* Bulk/interrupt in/out */
53#define CXACRU_EP_DATA 0x02 /* Bulk in/out */
54
55#define CMD_PACKET_SIZE 64 /* Should be maxpacket(ep)? */
56#define CMD_MAX_CONFIG ((CMD_PACKET_SIZE / 4 - 1) / 2)
57
58/* Addresses */
59#define PLLFCLK_ADDR 0x00350068
60#define PLLBCLK_ADDR 0x0035006c
61#define SDRAMEN_ADDR 0x00350010
62#define FW_ADDR 0x00801000
63#define BR_ADDR 0x00180600
64#define SIG_ADDR 0x00180500
65#define BR_STACK_ADDR 0x00187f10
66
67/* Values */
68#define SDRAM_ENA 0x1
69
70#define CMD_TIMEOUT 2000 /* msecs */
71#define POLL_INTERVAL 1 /* secs */
72
73/* commands for interaction with the modem through the control channel before
74 * firmware is loaded */
75enum cxacru_fw_request {
76 FW_CMD_ERR,
77 FW_GET_VER,
78 FW_READ_MEM,
79 FW_WRITE_MEM,
80 FW_RMW_MEM,
81 FW_CHECKSUM_MEM,
82 FW_GOTO_MEM,
83};
84
85/* commands for interaction with the modem through the control channel once
86 * firmware is loaded */
87enum cxacru_cm_request {
88 CM_REQUEST_UNDEFINED = 0x80,
89 CM_REQUEST_TEST,
90 CM_REQUEST_CHIP_GET_MAC_ADDRESS,
91 CM_REQUEST_CHIP_GET_DP_VERSIONS,
92 CM_REQUEST_CHIP_ADSL_LINE_START,
93 CM_REQUEST_CHIP_ADSL_LINE_STOP,
94 CM_REQUEST_CHIP_ADSL_LINE_GET_STATUS,
95 CM_REQUEST_CHIP_ADSL_LINE_GET_SPEED,
96 CM_REQUEST_CARD_INFO_GET,
97 CM_REQUEST_CARD_DATA_GET,
98 CM_REQUEST_CARD_DATA_SET,
99 CM_REQUEST_COMMAND_HW_IO,
100 CM_REQUEST_INTERFACE_HW_IO,
101 CM_REQUEST_CARD_SERIAL_DATA_PATH_GET,
102 CM_REQUEST_CARD_SERIAL_DATA_PATH_SET,
103 CM_REQUEST_CARD_CONTROLLER_VERSION_GET,
104 CM_REQUEST_CARD_GET_STATUS,
105 CM_REQUEST_CARD_GET_MAC_ADDRESS,
106 CM_REQUEST_CARD_GET_DATA_LINK_STATUS,
107 CM_REQUEST_MAX,
108};
109
110/* commands for interaction with the flash memory
111 *
112 * read: response is the contents of the first 60 bytes of flash memory
113 * write: request contains the 60 bytes of data to write to flash memory
114 * response is the contents of the first 60 bytes of flash memory
115 *
116 * layout: PP PP VV VV MM MM MM MM MM MM ?? ?? SS SS SS SS SS SS SS SS
117 * SS SS SS SS SS SS SS SS 00 00 00 00 00 00 00 00 00 00 00 00
118 * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
119 *
120 * P: le16 USB Product ID
121 * V: le16 USB Vendor ID
122 * M: be48 MAC Address
123 * S: le16 ASCII Serial Number
124 */
125enum cxacru_cm_flash {
126 CM_FLASH_READ = 0xa1,
127 CM_FLASH_WRITE = 0xa2
128};
129
130/* reply codes to the commands above */
131enum cxacru_cm_status {
132 CM_STATUS_UNDEFINED,
133 CM_STATUS_SUCCESS,
134 CM_STATUS_ERROR,
135 CM_STATUS_UNSUPPORTED,
136 CM_STATUS_UNIMPLEMENTED,
137 CM_STATUS_PARAMETER_ERROR,
138 CM_STATUS_DBG_LOOPBACK,
139 CM_STATUS_MAX,
140};
141
142/* indices into CARD_INFO_GET return array */
143enum cxacru_info_idx {
144 CXINF_DOWNSTREAM_RATE,
145 CXINF_UPSTREAM_RATE,
146 CXINF_LINK_STATUS,
147 CXINF_LINE_STATUS,
148 CXINF_MAC_ADDRESS_HIGH,
149 CXINF_MAC_ADDRESS_LOW,
150 CXINF_UPSTREAM_SNR_MARGIN,
151 CXINF_DOWNSTREAM_SNR_MARGIN,
152 CXINF_UPSTREAM_ATTENUATION,
153 CXINF_DOWNSTREAM_ATTENUATION,
154 CXINF_TRANSMITTER_POWER,
155 CXINF_UPSTREAM_BITS_PER_FRAME,
156 CXINF_DOWNSTREAM_BITS_PER_FRAME,
157 CXINF_STARTUP_ATTEMPTS,
158 CXINF_UPSTREAM_CRC_ERRORS,
159 CXINF_DOWNSTREAM_CRC_ERRORS,
160 CXINF_UPSTREAM_FEC_ERRORS,
161 CXINF_DOWNSTREAM_FEC_ERRORS,
162 CXINF_UPSTREAM_HEC_ERRORS,
163 CXINF_DOWNSTREAM_HEC_ERRORS,
164 CXINF_LINE_STARTABLE,
165 CXINF_MODULATION,
166 CXINF_ADSL_HEADEND,
167 CXINF_ADSL_HEADEND_ENVIRONMENT,
168 CXINF_CONTROLLER_VERSION,
169 /* dunno what the missing two mean */
170 CXINF_MAX = 0x1c,
171};
172
173enum cxacru_poll_state {
174 CXPOLL_STOPPING,
175 CXPOLL_STOPPED,
176 CXPOLL_POLLING,
177 CXPOLL_SHUTDOWN
178};
179
180struct cxacru_modem_type {
181 u32 pll_f_clk;
182 u32 pll_b_clk;
183 int boot_rom_patch;
184};
185
186struct cxacru_data {
187 struct usbatm_data *usbatm;
188
189 const struct cxacru_modem_type *modem_type;
190
191 int line_status;
192 struct mutex adsl_state_serialize;
193 int adsl_status;
194 struct delayed_work poll_work;
195 u32 card_info[CXINF_MAX];
196 struct mutex poll_state_serialize;
197 enum cxacru_poll_state poll_state;
198
199 /* contol handles */
200 struct mutex cm_serialize;
201 u8 *rcv_buf;
202 u8 *snd_buf;
203 struct urb *rcv_urb;
204 struct urb *snd_urb;
205 struct completion rcv_done;
206 struct completion snd_done;
207};
208
209static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
210 u8 *wdata, int wsize, u8 *rdata, int rsize);
211static void cxacru_poll_status(struct work_struct *work);
212
213/* Card info exported through sysfs */
214#define CXACRU__ATTR_INIT(_name) \
215static DEVICE_ATTR(_name, S_IRUGO, cxacru_sysfs_show_##_name, NULL)
216
217#define CXACRU_CMD_INIT(_name) \
218static DEVICE_ATTR(_name, S_IWUSR | S_IRUGO, \
219 cxacru_sysfs_show_##_name, cxacru_sysfs_store_##_name)
220
221#define CXACRU_SET_INIT(_name) \
222static DEVICE_ATTR(_name, S_IWUSR, \
223 NULL, cxacru_sysfs_store_##_name)
224
225#define CXACRU_ATTR_INIT(_value, _type, _name) \
226static ssize_t cxacru_sysfs_show_##_name(struct device *dev, \
227 struct device_attribute *attr, char *buf) \
228{ \
229 struct cxacru_data *instance = to_usbatm_driver_data(\
230 to_usb_interface(dev)); \
231\
232 if (instance == NULL) \
233 return -ENODEV; \
234\
235 return cxacru_sysfs_showattr_##_type(instance->card_info[_value], buf); \
236} \
237CXACRU__ATTR_INIT(_name)
238
239#define CXACRU_ATTR_CREATE(_v, _t, _name) CXACRU_DEVICE_CREATE_FILE(_name)
240#define CXACRU_CMD_CREATE(_name) CXACRU_DEVICE_CREATE_FILE(_name)
241#define CXACRU_SET_CREATE(_name) CXACRU_DEVICE_CREATE_FILE(_name)
242#define CXACRU__ATTR_CREATE(_name) CXACRU_DEVICE_CREATE_FILE(_name)
243
244#define CXACRU_ATTR_REMOVE(_v, _t, _name) CXACRU_DEVICE_REMOVE_FILE(_name)
245#define CXACRU_CMD_REMOVE(_name) CXACRU_DEVICE_REMOVE_FILE(_name)
246#define CXACRU_SET_REMOVE(_name) CXACRU_DEVICE_REMOVE_FILE(_name)
247#define CXACRU__ATTR_REMOVE(_name) CXACRU_DEVICE_REMOVE_FILE(_name)
248
249static ssize_t cxacru_sysfs_showattr_u32(u32 value, char *buf)
250{
251 return snprintf(buf, PAGE_SIZE, "%u\n", value);
252}
253
254static ssize_t cxacru_sysfs_showattr_s8(s8 value, char *buf)
255{
256 return snprintf(buf, PAGE_SIZE, "%d\n", value);
257}
258
259static ssize_t cxacru_sysfs_showattr_dB(s16 value, char *buf)
260{
261 if (likely(value >= 0)) {
262 return snprintf(buf, PAGE_SIZE, "%u.%02u\n",
263 value / 100, value % 100);
264 } else {
265 value = -value;
266 return snprintf(buf, PAGE_SIZE, "-%u.%02u\n",
267 value / 100, value % 100);
268 }
269}
270
271static ssize_t cxacru_sysfs_showattr_bool(u32 value, char *buf)
272{
273 static char *str[] = { "no", "yes" };
274 if (unlikely(value >= ARRAY_SIZE(str)))
275 return snprintf(buf, PAGE_SIZE, "%u\n", value);
276 return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
277}
278
279static ssize_t cxacru_sysfs_showattr_LINK(u32 value, char *buf)
280{
281 static char *str[] = { NULL, "not connected", "connected", "lost" };
282 if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL))
283 return snprintf(buf, PAGE_SIZE, "%u\n", value);
284 return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
285}
286
287static ssize_t cxacru_sysfs_showattr_LINE(u32 value, char *buf)
288{
289 static char *str[] = { "down", "attempting to activate",
290 "training", "channel analysis", "exchange", "up",
291 "waiting", "initialising"
292 };
293 if (unlikely(value >= ARRAY_SIZE(str)))
294 return snprintf(buf, PAGE_SIZE, "%u\n", value);
295 return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
296}
297
298static ssize_t cxacru_sysfs_showattr_MODU(u32 value, char *buf)
299{
300 static char *str[] = {
301 "",
302 "ANSI T1.413",
303 "ITU-T G.992.1 (G.DMT)",
304 "ITU-T G.992.2 (G.LITE)"
305 };
306 if (unlikely(value >= ARRAY_SIZE(str)))
307 return snprintf(buf, PAGE_SIZE, "%u\n", value);
308 return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
309}
310
311/*
312 * This could use MAC_ADDRESS_HIGH and MAC_ADDRESS_LOW, but since
313 * this data is already in atm_dev there's no point.
314 *
315 * MAC_ADDRESS_HIGH = 0x????5544
316 * MAC_ADDRESS_LOW = 0x33221100
317 * Where 00-55 are bytes 0-5 of the MAC.
318 */
319static ssize_t cxacru_sysfs_show_mac_address(struct device *dev,
320 struct device_attribute *attr, char *buf)
321{
322 struct cxacru_data *instance = to_usbatm_driver_data(
323 to_usb_interface(dev));
324
325 if (instance == NULL || instance->usbatm->atm_dev == NULL)
326 return -ENODEV;
327
328 return snprintf(buf, PAGE_SIZE, "%pM\n",
329 instance->usbatm->atm_dev->esi);
330}
331
332static ssize_t cxacru_sysfs_show_adsl_state(struct device *dev,
333 struct device_attribute *attr, char *buf)
334{
335 static char *str[] = { "running", "stopped" };
336 struct cxacru_data *instance = to_usbatm_driver_data(
337 to_usb_interface(dev));
338 u32 value;
339
340 if (instance == NULL)
341 return -ENODEV;
342
343 value = instance->card_info[CXINF_LINE_STARTABLE];
344 if (unlikely(value >= ARRAY_SIZE(str)))
345 return snprintf(buf, PAGE_SIZE, "%u\n", value);
346 return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
347}
348
349static ssize_t cxacru_sysfs_store_adsl_state(struct device *dev,
350 struct device_attribute *attr, const char *buf, size_t count)
351{
352 struct cxacru_data *instance = to_usbatm_driver_data(
353 to_usb_interface(dev));
354 int ret;
355 int poll = -1;
356 char str_cmd[8];
357 int len = strlen(buf);
358
359 if (!capable(CAP_NET_ADMIN))
360 return -EACCES;
361
362 ret = sscanf(buf, "%7s", str_cmd);
363 if (ret != 1)
364 return -EINVAL;
365 ret = 0;
366
367 if (instance == NULL)
368 return -ENODEV;
369
370 if (mutex_lock_interruptible(&instance->adsl_state_serialize))
371 return -ERESTARTSYS;
372
373 if (!strcmp(str_cmd, "stop") || !strcmp(str_cmd, "restart")) {
374 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_STOP, NULL, 0, NULL, 0);
375 if (ret < 0) {
376 atm_err(instance->usbatm, "change adsl state:"
377 " CHIP_ADSL_LINE_STOP returned %d\n", ret);
378
379 ret = -EIO;
380 } else {
381 ret = len;
382 poll = CXPOLL_STOPPED;
383 }
384 }
385
386 /* Line status is only updated every second
387 * and the device appears to only react to
388 * START/STOP every second too. Wait 1.5s to
389 * be sure that restart will have an effect. */
390 if (!strcmp(str_cmd, "restart"))
391 msleep(1500);
392
393 if (!strcmp(str_cmd, "start") || !strcmp(str_cmd, "restart")) {
394 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
395 if (ret < 0) {
396 atm_err(instance->usbatm, "change adsl state:"
397 " CHIP_ADSL_LINE_START returned %d\n", ret);
398
399 ret = -EIO;
400 } else {
401 ret = len;
402 poll = CXPOLL_POLLING;
403 }
404 }
405
406 if (!strcmp(str_cmd, "poll")) {
407 ret = len;
408 poll = CXPOLL_POLLING;
409 }
410
411 if (ret == 0) {
412 ret = -EINVAL;
413 poll = -1;
414 }
415
416 if (poll == CXPOLL_POLLING) {
417 mutex_lock(&instance->poll_state_serialize);
418 switch (instance->poll_state) {
419 case CXPOLL_STOPPED:
420 /* start polling */
421 instance->poll_state = CXPOLL_POLLING;
422 break;
423
424 case CXPOLL_STOPPING:
425 /* abort stop request */
426 instance->poll_state = CXPOLL_POLLING;
427 case CXPOLL_POLLING:
428 case CXPOLL_SHUTDOWN:
429 /* don't start polling */
430 poll = -1;
431 }
432 mutex_unlock(&instance->poll_state_serialize);
433 } else if (poll == CXPOLL_STOPPED) {
434 mutex_lock(&instance->poll_state_serialize);
435 /* request stop */
436 if (instance->poll_state == CXPOLL_POLLING)
437 instance->poll_state = CXPOLL_STOPPING;
438 mutex_unlock(&instance->poll_state_serialize);
439 }
440
441 mutex_unlock(&instance->adsl_state_serialize);
442
443 if (poll == CXPOLL_POLLING)
444 cxacru_poll_status(&instance->poll_work.work);
445
446 return ret;
447}
448
449/* CM_REQUEST_CARD_DATA_GET times out, so no show attribute */
450
451static ssize_t cxacru_sysfs_store_adsl_config(struct device *dev,
452 struct device_attribute *attr, const char *buf, size_t count)
453{
454 struct cxacru_data *instance = to_usbatm_driver_data(
455 to_usb_interface(dev));
456 int len = strlen(buf);
457 int ret, pos, num;
458 __le32 data[CMD_PACKET_SIZE / 4];
459
460 if (!capable(CAP_NET_ADMIN))
461 return -EACCES;
462
463 if (instance == NULL)
464 return -ENODEV;
465
466 pos = 0;
467 num = 0;
468 while (pos < len) {
469 int tmp;
470 u32 index;
471 u32 value;
472
473 ret = sscanf(buf + pos, "%x=%x%n", &index, &value, &tmp);
474 if (ret < 2)
475 return -EINVAL;
476 if (index < 0 || index > 0x7f)
477 return -EINVAL;
478 pos += tmp;
479
480 /* skip trailing newline */
481 if (buf[pos] == '\n' && pos == len-1)
482 pos++;
483
484 data[num * 2 + 1] = cpu_to_le32(index);
485 data[num * 2 + 2] = cpu_to_le32(value);
486 num++;
487
488 /* send config values when data buffer is full
489 * or no more data
490 */
491 if (pos >= len || num >= CMD_MAX_CONFIG) {
492 char log[CMD_MAX_CONFIG * 12 + 1]; /* %02x=%08x */
493
494 data[0] = cpu_to_le32(num);
495 ret = cxacru_cm(instance, CM_REQUEST_CARD_DATA_SET,
496 (u8 *) data, 4 + num * 8, NULL, 0);
497 if (ret < 0) {
498 atm_err(instance->usbatm,
499 "set card data returned %d\n", ret);
500 return -EIO;
501 }
502
503 for (tmp = 0; tmp < num; tmp++)
504 snprintf(log + tmp*12, 13, " %02x=%08x",
505 le32_to_cpu(data[tmp * 2 + 1]),
506 le32_to_cpu(data[tmp * 2 + 2]));
507 atm_info(instance->usbatm, "config%s\n", log);
508 num = 0;
509 }
510 }
511
512 return len;
513}
514
515/*
516 * All device attributes are included in CXACRU_ALL_FILES
517 * so that the same list can be used multiple times:
518 * INIT (define the device attributes)
519 * CREATE (create all the device files)
520 * REMOVE (remove all the device files)
521 *
522 * With the last two being defined as needed in the functions
523 * they are used in before calling CXACRU_ALL_FILES()
524 */
525#define CXACRU_ALL_FILES(_action) \
526CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_RATE, u32, downstream_rate); \
527CXACRU_ATTR_##_action(CXINF_UPSTREAM_RATE, u32, upstream_rate); \
528CXACRU_ATTR_##_action(CXINF_LINK_STATUS, LINK, link_status); \
529CXACRU_ATTR_##_action(CXINF_LINE_STATUS, LINE, line_status); \
530CXACRU__ATTR_##_action( mac_address); \
531CXACRU_ATTR_##_action(CXINF_UPSTREAM_SNR_MARGIN, dB, upstream_snr_margin); \
532CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_SNR_MARGIN, dB, downstream_snr_margin); \
533CXACRU_ATTR_##_action(CXINF_UPSTREAM_ATTENUATION, dB, upstream_attenuation); \
534CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_ATTENUATION, dB, downstream_attenuation); \
535CXACRU_ATTR_##_action(CXINF_TRANSMITTER_POWER, s8, transmitter_power); \
536CXACRU_ATTR_##_action(CXINF_UPSTREAM_BITS_PER_FRAME, u32, upstream_bits_per_frame); \
537CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_BITS_PER_FRAME, u32, downstream_bits_per_frame); \
538CXACRU_ATTR_##_action(CXINF_STARTUP_ATTEMPTS, u32, startup_attempts); \
539CXACRU_ATTR_##_action(CXINF_UPSTREAM_CRC_ERRORS, u32, upstream_crc_errors); \
540CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_CRC_ERRORS, u32, downstream_crc_errors); \
541CXACRU_ATTR_##_action(CXINF_UPSTREAM_FEC_ERRORS, u32, upstream_fec_errors); \
542CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_FEC_ERRORS, u32, downstream_fec_errors); \
543CXACRU_ATTR_##_action(CXINF_UPSTREAM_HEC_ERRORS, u32, upstream_hec_errors); \
544CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_HEC_ERRORS, u32, downstream_hec_errors); \
545CXACRU_ATTR_##_action(CXINF_LINE_STARTABLE, bool, line_startable); \
546CXACRU_ATTR_##_action(CXINF_MODULATION, MODU, modulation); \
547CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND, u32, adsl_headend); \
548CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND_ENVIRONMENT, u32, adsl_headend_environment); \
549CXACRU_ATTR_##_action(CXINF_CONTROLLER_VERSION, u32, adsl_controller_version); \
550CXACRU_CMD_##_action( adsl_state); \
551CXACRU_SET_##_action( adsl_config);
552
553CXACRU_ALL_FILES(INIT);
554
555/* the following three functions are stolen from drivers/usb/core/message.c */
556static void cxacru_blocking_completion(struct urb *urb)
557{
558 complete(urb->context);
559}
560
561static void cxacru_timeout_kill(unsigned long data)
562{
563 usb_unlink_urb((struct urb *) data);
564}
565
566static int cxacru_start_wait_urb(struct urb *urb, struct completion *done,
567 int *actual_length)
568{
569 struct timer_list timer;
570
571 init_timer(&timer);
572 timer.expires = jiffies + msecs_to_jiffies(CMD_TIMEOUT);
573 timer.data = (unsigned long) urb;
574 timer.function = cxacru_timeout_kill;
575 add_timer(&timer);
576 wait_for_completion(done);
577 del_timer_sync(&timer);
578
579 if (actual_length)
580 *actual_length = urb->actual_length;
581 return urb->status; /* must read status after completion */
582}
583
584static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
585 u8 *wdata, int wsize, u8 *rdata, int rsize)
586{
587 int ret, actlen;
588 int offb, offd;
589 const int stride = CMD_PACKET_SIZE - 4;
590 u8 *wbuf = instance->snd_buf;
591 u8 *rbuf = instance->rcv_buf;
592 int wbuflen = ((wsize - 1) / stride + 1) * CMD_PACKET_SIZE;
593 int rbuflen = ((rsize - 1) / stride + 1) * CMD_PACKET_SIZE;
594
595 if (wbuflen > PAGE_SIZE || rbuflen > PAGE_SIZE) {
596 if (printk_ratelimit())
597 usb_err(instance->usbatm, "requested transfer size too large (%d, %d)\n",
598 wbuflen, rbuflen);
599 ret = -ENOMEM;
600 goto err;
601 }
602
603 mutex_lock(&instance->cm_serialize);
604
605 /* submit reading urb before the writing one */
606 init_completion(&instance->rcv_done);
607 ret = usb_submit_urb(instance->rcv_urb, GFP_KERNEL);
608 if (ret < 0) {
609 if (printk_ratelimit())
610 usb_err(instance->usbatm, "submit of read urb for cm %#x failed (%d)\n",
611 cm, ret);
612 goto fail;
613 }
614
615 memset(wbuf, 0, wbuflen);
616 /* handle wsize == 0 */
617 wbuf[0] = cm;
618 for (offb = offd = 0; offd < wsize; offd += stride, offb += CMD_PACKET_SIZE) {
619 wbuf[offb] = cm;
620 memcpy(wbuf + offb + 4, wdata + offd, min_t(int, stride, wsize - offd));
621 }
622
623 instance->snd_urb->transfer_buffer_length = wbuflen;
624 init_completion(&instance->snd_done);
625 ret = usb_submit_urb(instance->snd_urb, GFP_KERNEL);
626 if (ret < 0) {
627 if (printk_ratelimit())
628 usb_err(instance->usbatm, "submit of write urb for cm %#x failed (%d)\n",
629 cm, ret);
630 goto fail;
631 }
632
633 ret = cxacru_start_wait_urb(instance->snd_urb, &instance->snd_done, NULL);
634 if (ret < 0) {
635 if (printk_ratelimit())
636 usb_err(instance->usbatm, "send of cm %#x failed (%d)\n", cm, ret);
637 goto fail;
638 }
639
640 ret = cxacru_start_wait_urb(instance->rcv_urb, &instance->rcv_done, &actlen);
641 if (ret < 0) {
642 if (printk_ratelimit())
643 usb_err(instance->usbatm, "receive of cm %#x failed (%d)\n", cm, ret);
644 goto fail;
645 }
646 if (actlen % CMD_PACKET_SIZE || !actlen) {
647 if (printk_ratelimit())
648 usb_err(instance->usbatm, "invalid response length to cm %#x: %d\n",
649 cm, actlen);
650 ret = -EIO;
651 goto fail;
652 }
653
654 /* check the return status and copy the data to the output buffer, if needed */
655 for (offb = offd = 0; offd < rsize && offb < actlen; offb += CMD_PACKET_SIZE) {
656 if (rbuf[offb] != cm) {
657 if (printk_ratelimit())
658 usb_err(instance->usbatm, "wrong cm %#x in response to cm %#x\n",
659 rbuf[offb], cm);
660 ret = -EIO;
661 goto fail;
662 }
663 if (rbuf[offb + 1] != CM_STATUS_SUCCESS) {
664 if (printk_ratelimit())
665 usb_err(instance->usbatm, "response to cm %#x failed: %#x\n",
666 cm, rbuf[offb + 1]);
667 ret = -EIO;
668 goto fail;
669 }
670 if (offd >= rsize)
671 break;
672 memcpy(rdata + offd, rbuf + offb + 4, min_t(int, stride, rsize - offd));
673 offd += stride;
674 }
675
676 ret = offd;
677 dbg("cm %#x", cm);
678fail:
679 mutex_unlock(&instance->cm_serialize);
680err:
681 return ret;
682}
683
684static int cxacru_cm_get_array(struct cxacru_data *instance, enum cxacru_cm_request cm,
685 u32 *data, int size)
686{
687 int ret, len;
688 __le32 *buf;
689 int offb, offd;
690 const int stride = CMD_PACKET_SIZE / (4 * 2) - 1;
691 int buflen = ((size - 1) / stride + 1 + size * 2) * 4;
692
693 buf = kmalloc(buflen, GFP_KERNEL);
694 if (!buf)
695 return -ENOMEM;
696
697 ret = cxacru_cm(instance, cm, NULL, 0, (u8 *) buf, buflen);
698 if (ret < 0)
699 goto cleanup;
700
701 /* len > 0 && len % 4 == 0 guaranteed by cxacru_cm() */
702 len = ret / 4;
703 for (offb = 0; offb < len; ) {
704 int l = le32_to_cpu(buf[offb++]);
705 if (l < 0 || l > stride || l > (len - offb) / 2) {
706 if (printk_ratelimit())
707 usb_err(instance->usbatm, "invalid data length from cm %#x: %d\n",
708 cm, l);
709 ret = -EIO;
710 goto cleanup;
711 }
712 while (l--) {
713 offd = le32_to_cpu(buf[offb++]);
714 if (offd >= size) {
715 if (printk_ratelimit())
716 usb_err(instance->usbatm, "wrong index %#x in response to cm %#x\n",
717 offd, cm);
718 ret = -EIO;
719 goto cleanup;
720 }
721 data[offd] = le32_to_cpu(buf[offb++]);
722 }
723 }
724
725 ret = 0;
726
727cleanup:
728 kfree(buf);
729 return ret;
730}
731
732static int cxacru_card_status(struct cxacru_data *instance)
733{
734 int ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
735 if (ret < 0) { /* firmware not loaded */
736 dbg("cxacru_adsl_start: CARD_GET_STATUS returned %d", ret);
737 return ret;
738 }
739 return 0;
740}
741
742static void cxacru_remove_device_files(struct usbatm_data *usbatm_instance,
743 struct atm_dev *atm_dev)
744{
745 struct usb_interface *intf = usbatm_instance->usb_intf;
746
747 #define CXACRU_DEVICE_REMOVE_FILE(_name) \
748 device_remove_file(&intf->dev, &dev_attr_##_name);
749 CXACRU_ALL_FILES(REMOVE);
750 #undef CXACRU_DEVICE_REMOVE_FILE
751}
752
753static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
754 struct atm_dev *atm_dev)
755{
756 struct cxacru_data *instance = usbatm_instance->driver_data;
757 struct usb_interface *intf = usbatm_instance->usb_intf;
758 int ret;
759 int start_polling = 1;
760
761 dbg("cxacru_atm_start");
762
763 /* Read MAC address */
764 ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_MAC_ADDRESS, NULL, 0,
765 atm_dev->esi, sizeof(atm_dev->esi));
766 if (ret < 0) {
767 atm_err(usbatm_instance, "cxacru_atm_start: CARD_GET_MAC_ADDRESS returned %d\n", ret);
768 return ret;
769 }
770
771 #define CXACRU_DEVICE_CREATE_FILE(_name) \
772 ret = device_create_file(&intf->dev, &dev_attr_##_name); \
773 if (unlikely(ret)) \
774 goto fail_sysfs;
775 CXACRU_ALL_FILES(CREATE);
776 #undef CXACRU_DEVICE_CREATE_FILE
777
778 /* start ADSL */
779 mutex_lock(&instance->adsl_state_serialize);
780 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
781 if (ret < 0)
782 atm_err(usbatm_instance, "cxacru_atm_start: CHIP_ADSL_LINE_START returned %d\n", ret);
783
784 /* Start status polling */
785 mutex_lock(&instance->poll_state_serialize);
786 switch (instance->poll_state) {
787 case CXPOLL_STOPPED:
788 /* start polling */
789 instance->poll_state = CXPOLL_POLLING;
790 break;
791
792 case CXPOLL_STOPPING:
793 /* abort stop request */
794 instance->poll_state = CXPOLL_POLLING;
795 case CXPOLL_POLLING:
796 case CXPOLL_SHUTDOWN:
797 /* don't start polling */
798 start_polling = 0;
799 }
800 mutex_unlock(&instance->poll_state_serialize);
801 mutex_unlock(&instance->adsl_state_serialize);
802
803 printk(KERN_INFO "%s%d: %s %pM\n", atm_dev->type, atm_dev->number,
804 usbatm_instance->description, atm_dev->esi);
805
806 if (start_polling)
807 cxacru_poll_status(&instance->poll_work.work);
808 return 0;
809
810fail_sysfs:
811 usb_err(usbatm_instance, "cxacru_atm_start: device_create_file failed (%d)\n", ret);
812 cxacru_remove_device_files(usbatm_instance, atm_dev);
813 return ret;
814}
815
816static void cxacru_poll_status(struct work_struct *work)
817{
818 struct cxacru_data *instance =
819 container_of(work, struct cxacru_data, poll_work.work);
820 u32 buf[CXINF_MAX] = {};
821 struct usbatm_data *usbatm = instance->usbatm;
822 struct atm_dev *atm_dev = usbatm->atm_dev;
823 int keep_polling = 1;
824 int ret;
825
826 ret = cxacru_cm_get_array(instance, CM_REQUEST_CARD_INFO_GET, buf, CXINF_MAX);
827 if (ret < 0) {
828 if (ret != -ESHUTDOWN)
829 atm_warn(usbatm, "poll status: error %d\n", ret);
830
831 mutex_lock(&instance->poll_state_serialize);
832 if (instance->poll_state != CXPOLL_SHUTDOWN) {
833 instance->poll_state = CXPOLL_STOPPED;
834
835 if (ret != -ESHUTDOWN)
836 atm_warn(usbatm, "polling disabled, set adsl_state"
837 " to 'start' or 'poll' to resume\n");
838 }
839 mutex_unlock(&instance->poll_state_serialize);
840 goto reschedule;
841 }
842
843 memcpy(instance->card_info, buf, sizeof(instance->card_info));
844
845 if (instance->adsl_status != buf[CXINF_LINE_STARTABLE]) {
846 instance->adsl_status = buf[CXINF_LINE_STARTABLE];
847
848 switch (instance->adsl_status) {
849 case 0:
850 atm_printk(KERN_INFO, usbatm, "ADSL state: running\n");
851 break;
852
853 case 1:
854 atm_printk(KERN_INFO, usbatm, "ADSL state: stopped\n");
855 break;
856
857 default:
858 atm_printk(KERN_INFO, usbatm, "Unknown adsl status %02x\n", instance->adsl_status);
859 break;
860 }
861 }
862
863 if (instance->line_status == buf[CXINF_LINE_STATUS])
864 goto reschedule;
865
866 instance->line_status = buf[CXINF_LINE_STATUS];
867 switch (instance->line_status) {
868 case 0:
869 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
870 atm_info(usbatm, "ADSL line: down\n");
871 break;
872
873 case 1:
874 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
875 atm_info(usbatm, "ADSL line: attempting to activate\n");
876 break;
877
878 case 2:
879 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
880 atm_info(usbatm, "ADSL line: training\n");
881 break;
882
883 case 3:
884 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
885 atm_info(usbatm, "ADSL line: channel analysis\n");
886 break;
887
888 case 4:
889 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
890 atm_info(usbatm, "ADSL line: exchange\n");
891 break;
892
893 case 5:
894 atm_dev->link_rate = buf[CXINF_DOWNSTREAM_RATE] * 1000 / 424;
895 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_FOUND);
896
897 atm_info(usbatm, "ADSL line: up (%d kb/s down | %d kb/s up)\n",
898 buf[CXINF_DOWNSTREAM_RATE], buf[CXINF_UPSTREAM_RATE]);
899 break;
900
901 case 6:
902 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
903 atm_info(usbatm, "ADSL line: waiting\n");
904 break;
905
906 case 7:
907 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
908 atm_info(usbatm, "ADSL line: initializing\n");
909 break;
910
911 default:
912 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_UNKNOWN);
913 atm_info(usbatm, "Unknown line state %02x\n", instance->line_status);
914 break;
915 }
916reschedule:
917
918 mutex_lock(&instance->poll_state_serialize);
919 if (instance->poll_state == CXPOLL_STOPPING &&
920 instance->adsl_status == 1 && /* stopped */
921 instance->line_status == 0) /* down */
922 instance->poll_state = CXPOLL_STOPPED;
923
924 if (instance->poll_state == CXPOLL_STOPPED)
925 keep_polling = 0;
926 mutex_unlock(&instance->poll_state_serialize);
927
928 if (keep_polling)
929 schedule_delayed_work(&instance->poll_work,
930 round_jiffies_relative(POLL_INTERVAL*HZ));
931}
932
933static int cxacru_fw(struct usb_device *usb_dev, enum cxacru_fw_request fw,
934 u8 code1, u8 code2, u32 addr, const u8 *data, int size)
935{
936 int ret;
937 u8 *buf;
938 int offd, offb;
939 const int stride = CMD_PACKET_SIZE - 8;
940
941 buf = (u8 *) __get_free_page(GFP_KERNEL);
942 if (!buf)
943 return -ENOMEM;
944
945 offb = offd = 0;
946 do {
947 int l = min_t(int, stride, size - offd);
948 buf[offb++] = fw;
949 buf[offb++] = l;
950 buf[offb++] = code1;
951 buf[offb++] = code2;
952 put_unaligned(cpu_to_le32(addr), (__le32 *)(buf + offb));
953 offb += 4;
954 addr += l;
955 if (l)
956 memcpy(buf + offb, data + offd, l);
957 if (l < stride)
958 memset(buf + offb + l, 0, stride - l);
959 offb += stride;
960 offd += stride;
961 if ((offb >= PAGE_SIZE) || (offd >= size)) {
962 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
963 buf, offb, NULL, CMD_TIMEOUT);
964 if (ret < 0) {
965 dbg("sending fw %#x failed", fw);
966 goto cleanup;
967 }
968 offb = 0;
969 }
970 } while (offd < size);
971 dbg("sent fw %#x", fw);
972
973 ret = 0;
974
975cleanup:
976 free_page((unsigned long) buf);
977 return ret;
978}
979
980static void cxacru_upload_firmware(struct cxacru_data *instance,
981 const struct firmware *fw,
982 const struct firmware *bp)
983{
984 int ret;
985 struct usbatm_data *usbatm = instance->usbatm;
986 struct usb_device *usb_dev = usbatm->usb_dev;
987 __le16 signature[] = { usb_dev->descriptor.idVendor,
988 usb_dev->descriptor.idProduct };
989 __le32 val;
990
991 dbg("cxacru_upload_firmware");
992
993 /* FirmwarePllFClkValue */
994 val = cpu_to_le32(instance->modem_type->pll_f_clk);
995 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLFCLK_ADDR, (u8 *) &val, 4);
996 if (ret) {
997 usb_err(usbatm, "FirmwarePllFClkValue failed: %d\n", ret);
998 return;
999 }
1000
1001 /* FirmwarePllBClkValue */
1002 val = cpu_to_le32(instance->modem_type->pll_b_clk);
1003 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLBCLK_ADDR, (u8 *) &val, 4);
1004 if (ret) {
1005 usb_err(usbatm, "FirmwarePllBClkValue failed: %d\n", ret);
1006 return;
1007 }
1008
1009 /* Enable SDRAM */
1010 val = cpu_to_le32(SDRAM_ENA);
1011 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SDRAMEN_ADDR, (u8 *) &val, 4);
1012 if (ret) {
1013 usb_err(usbatm, "Enable SDRAM failed: %d\n", ret);
1014 return;
1015 }
1016
1017 /* Firmware */
1018 usb_info(usbatm, "loading firmware\n");
1019 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, FW_ADDR, fw->data, fw->size);
1020 if (ret) {
1021 usb_err(usbatm, "Firmware upload failed: %d\n", ret);
1022 return;
1023 }
1024
1025 /* Boot ROM patch */
1026 if (instance->modem_type->boot_rom_patch) {
1027 usb_info(usbatm, "loading boot ROM patch\n");
1028 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_ADDR, bp->data, bp->size);
1029 if (ret) {
1030 usb_err(usbatm, "Boot ROM patching failed: %d\n", ret);
1031 return;
1032 }
1033 }
1034
1035 /* Signature */
1036 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SIG_ADDR, (u8 *) signature, 4);
1037 if (ret) {
1038 usb_err(usbatm, "Signature storing failed: %d\n", ret);
1039 return;
1040 }
1041
1042 usb_info(usbatm, "starting device\n");
1043 if (instance->modem_type->boot_rom_patch) {
1044 val = cpu_to_le32(BR_ADDR);
1045 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_STACK_ADDR, (u8 *) &val, 4);
1046 } else {
1047 ret = cxacru_fw(usb_dev, FW_GOTO_MEM, 0x0, 0x0, FW_ADDR, NULL, 0);
1048 }
1049 if (ret) {
1050 usb_err(usbatm, "Passing control to firmware failed: %d\n", ret);
1051 return;
1052 }
1053
1054 /* Delay to allow firmware to start up. */
1055 msleep_interruptible(1000);
1056
1057 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD));
1058 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD));
1059 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_DATA));
1060 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_DATA));
1061
1062 ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
1063 if (ret < 0) {
1064 usb_err(usbatm, "modem failed to initialize: %d\n", ret);
1065 return;
1066 }
1067}
1068
1069static int cxacru_find_firmware(struct cxacru_data *instance,
1070 char *phase, const struct firmware **fw_p)
1071{
1072 struct usbatm_data *usbatm = instance->usbatm;
1073 struct device *dev = &usbatm->usb_intf->dev;
1074 char buf[16];
1075
1076 sprintf(buf, "cxacru-%s.bin", phase);
1077 dbg("cxacru_find_firmware: looking for %s", buf);
1078
1079 if (request_firmware(fw_p, buf, dev)) {
1080 usb_dbg(usbatm, "no stage %s firmware found\n", phase);
1081 return -ENOENT;
1082 }
1083
1084 usb_info(usbatm, "found firmware %s\n", buf);
1085
1086 return 0;
1087}
1088
1089static int cxacru_heavy_init(struct usbatm_data *usbatm_instance,
1090 struct usb_interface *usb_intf)
1091{
1092 const struct firmware *fw, *bp;
1093 struct cxacru_data *instance = usbatm_instance->driver_data;
1094
1095 int ret = cxacru_find_firmware(instance, "fw", &fw);
1096 if (ret) {
1097 usb_warn(usbatm_instance, "firmware (cxacru-fw.bin) unavailable (system misconfigured?)\n");
1098 return ret;
1099 }
1100
1101 if (instance->modem_type->boot_rom_patch) {
1102 ret = cxacru_find_firmware(instance, "bp", &bp);
1103 if (ret) {
1104 usb_warn(usbatm_instance, "boot ROM patch (cxacru-bp.bin) unavailable (system misconfigured?)\n");
1105 release_firmware(fw);
1106 return ret;
1107 }
1108 }
1109
1110 cxacru_upload_firmware(instance, fw, bp);
1111
1112 if (instance->modem_type->boot_rom_patch)
1113 release_firmware(bp);
1114 release_firmware(fw);
1115
1116 ret = cxacru_card_status(instance);
1117 if (ret)
1118 dbg("modem initialisation failed");
1119 else
1120 dbg("done setting up the modem");
1121
1122 return ret;
1123}
1124
1125static int cxacru_bind(struct usbatm_data *usbatm_instance,
1126 struct usb_interface *intf, const struct usb_device_id *id)
1127{
1128 struct cxacru_data *instance;
1129 struct usb_device *usb_dev = interface_to_usbdev(intf);
1130 struct usb_host_endpoint *cmd_ep = usb_dev->ep_in[CXACRU_EP_CMD];
1131 int ret;
1132
1133 /* instance init */
1134 instance = kzalloc(sizeof(*instance), GFP_KERNEL);
1135 if (!instance) {
1136 dbg("cxacru_bind: no memory for instance data");
1137 return -ENOMEM;
1138 }
1139
1140 instance->usbatm = usbatm_instance;
1141 instance->modem_type = (struct cxacru_modem_type *) id->driver_info;
1142
1143 mutex_init(&instance->poll_state_serialize);
1144 instance->poll_state = CXPOLL_STOPPED;
1145 instance->line_status = -1;
1146 instance->adsl_status = -1;
1147
1148 mutex_init(&instance->adsl_state_serialize);
1149
1150 instance->rcv_buf = (u8 *) __get_free_page(GFP_KERNEL);
1151 if (!instance->rcv_buf) {
1152 dbg("cxacru_bind: no memory for rcv_buf");
1153 ret = -ENOMEM;
1154 goto fail;
1155 }
1156 instance->snd_buf = (u8 *) __get_free_page(GFP_KERNEL);
1157 if (!instance->snd_buf) {
1158 dbg("cxacru_bind: no memory for snd_buf");
1159 ret = -ENOMEM;
1160 goto fail;
1161 }
1162 instance->rcv_urb = usb_alloc_urb(0, GFP_KERNEL);
1163 if (!instance->rcv_urb) {
1164 dbg("cxacru_bind: no memory for rcv_urb");
1165 ret = -ENOMEM;
1166 goto fail;
1167 }
1168 instance->snd_urb = usb_alloc_urb(0, GFP_KERNEL);
1169 if (!instance->snd_urb) {
1170 dbg("cxacru_bind: no memory for snd_urb");
1171 ret = -ENOMEM;
1172 goto fail;
1173 }
1174
1175 if (!cmd_ep) {
1176 dbg("cxacru_bind: no command endpoint");
1177 ret = -ENODEV;
1178 goto fail;
1179 }
1180
1181 if ((cmd_ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1182 == USB_ENDPOINT_XFER_INT) {
1183 usb_fill_int_urb(instance->rcv_urb,
1184 usb_dev, usb_rcvintpipe(usb_dev, CXACRU_EP_CMD),
1185 instance->rcv_buf, PAGE_SIZE,
1186 cxacru_blocking_completion, &instance->rcv_done, 1);
1187
1188 usb_fill_int_urb(instance->snd_urb,
1189 usb_dev, usb_sndintpipe(usb_dev, CXACRU_EP_CMD),
1190 instance->snd_buf, PAGE_SIZE,
1191 cxacru_blocking_completion, &instance->snd_done, 4);
1192 } else {
1193 usb_fill_bulk_urb(instance->rcv_urb,
1194 usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD),
1195 instance->rcv_buf, PAGE_SIZE,
1196 cxacru_blocking_completion, &instance->rcv_done);
1197
1198 usb_fill_bulk_urb(instance->snd_urb,
1199 usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
1200 instance->snd_buf, PAGE_SIZE,
1201 cxacru_blocking_completion, &instance->snd_done);
1202 }
1203
1204 mutex_init(&instance->cm_serialize);
1205
1206 INIT_DELAYED_WORK(&instance->poll_work, cxacru_poll_status);
1207
1208 usbatm_instance->driver_data = instance;
1209
1210 usbatm_instance->flags = (cxacru_card_status(instance) ? 0 : UDSL_SKIP_HEAVY_INIT);
1211
1212 return 0;
1213
1214 fail:
1215 free_page((unsigned long) instance->snd_buf);
1216 free_page((unsigned long) instance->rcv_buf);
1217 usb_free_urb(instance->snd_urb);
1218 usb_free_urb(instance->rcv_urb);
1219 kfree(instance);
1220
1221 return ret;
1222}
1223
1224static void cxacru_unbind(struct usbatm_data *usbatm_instance,
1225 struct usb_interface *intf)
1226{
1227 struct cxacru_data *instance = usbatm_instance->driver_data;
1228 int is_polling = 1;
1229
1230 dbg("cxacru_unbind entered");
1231
1232 if (!instance) {
1233 dbg("cxacru_unbind: NULL instance!");
1234 return;
1235 }
1236
1237 mutex_lock(&instance->poll_state_serialize);
1238 BUG_ON(instance->poll_state == CXPOLL_SHUTDOWN);
1239
1240 /* ensure that status polling continues unless
1241 * it has already stopped */
1242 if (instance->poll_state == CXPOLL_STOPPED)
1243 is_polling = 0;
1244
1245 /* stop polling from being stopped or started */
1246 instance->poll_state = CXPOLL_SHUTDOWN;
1247 mutex_unlock(&instance->poll_state_serialize);
1248
1249 if (is_polling)
1250 cancel_delayed_work_sync(&instance->poll_work);
1251
1252 usb_kill_urb(instance->snd_urb);
1253 usb_kill_urb(instance->rcv_urb);
1254 usb_free_urb(instance->snd_urb);
1255 usb_free_urb(instance->rcv_urb);
1256
1257 free_page((unsigned long) instance->snd_buf);
1258 free_page((unsigned long) instance->rcv_buf);
1259
1260 kfree(instance);
1261
1262 usbatm_instance->driver_data = NULL;
1263}
1264
1265static const struct cxacru_modem_type cxacru_cafe = {
1266 .pll_f_clk = 0x02d874df,
1267 .pll_b_clk = 0x0196a51a,
1268 .boot_rom_patch = 1,
1269};
1270
1271static const struct cxacru_modem_type cxacru_cb00 = {
1272 .pll_f_clk = 0x5,
1273 .pll_b_clk = 0x3,
1274 .boot_rom_patch = 0,
1275};
1276
1277static const struct usb_device_id cxacru_usb_ids[] = {
1278 { /* V = Conexant P = ADSL modem (Euphrates project) */
1279 USB_DEVICE(0x0572, 0xcafe), .driver_info = (unsigned long) &cxacru_cafe
1280 },
1281 { /* V = Conexant P = ADSL modem (Hasbani project) */
1282 USB_DEVICE(0x0572, 0xcb00), .driver_info = (unsigned long) &cxacru_cb00
1283 },
1284 { /* V = Conexant P = ADSL modem */
1285 USB_DEVICE(0x0572, 0xcb01), .driver_info = (unsigned long) &cxacru_cb00
1286 },
1287 { /* V = Conexant P = ADSL modem (Well PTI-800) */
1288 USB_DEVICE(0x0572, 0xcb02), .driver_info = (unsigned long) &cxacru_cb00
1289 },
1290 { /* V = Conexant P = ADSL modem */
1291 USB_DEVICE(0x0572, 0xcb06), .driver_info = (unsigned long) &cxacru_cb00
1292 },
1293 { /* V = Conexant P = ADSL modem (ZTE ZXDSL 852) */
1294 USB_DEVICE(0x0572, 0xcb07), .driver_info = (unsigned long) &cxacru_cb00
1295 },
1296 { /* V = Olitec P = ADSL modem version 2 */
1297 USB_DEVICE(0x08e3, 0x0100), .driver_info = (unsigned long) &cxacru_cafe
1298 },
1299 { /* V = Olitec P = ADSL modem version 3 */
1300 USB_DEVICE(0x08e3, 0x0102), .driver_info = (unsigned long) &cxacru_cb00
1301 },
1302 { /* V = Trust/Amigo Technology Co. P = AMX-CA86U */
1303 USB_DEVICE(0x0eb0, 0x3457), .driver_info = (unsigned long) &cxacru_cafe
1304 },
1305 { /* V = Zoom P = 5510 */
1306 USB_DEVICE(0x1803, 0x5510), .driver_info = (unsigned long) &cxacru_cb00
1307 },
1308 { /* V = Draytek P = Vigor 318 */
1309 USB_DEVICE(0x0675, 0x0200), .driver_info = (unsigned long) &cxacru_cb00
1310 },
1311 { /* V = Zyxel P = 630-C1 aka OMNI ADSL USB (Annex A) */
1312 USB_DEVICE(0x0586, 0x330a), .driver_info = (unsigned long) &cxacru_cb00
1313 },
1314 { /* V = Zyxel P = 630-C3 aka OMNI ADSL USB (Annex B) */
1315 USB_DEVICE(0x0586, 0x330b), .driver_info = (unsigned long) &cxacru_cb00
1316 },
1317 { /* V = Aethra P = Starmodem UM1020 */
1318 USB_DEVICE(0x0659, 0x0020), .driver_info = (unsigned long) &cxacru_cb00
1319 },
1320 { /* V = Aztech Systems P = ? AKA Pirelli AUA-010 */
1321 USB_DEVICE(0x0509, 0x0812), .driver_info = (unsigned long) &cxacru_cb00
1322 },
1323 { /* V = Netopia P = Cayman 3341(Annex A)/3351(Annex B) */
1324 USB_DEVICE(0x100d, 0xcb01), .driver_info = (unsigned long) &cxacru_cb00
1325 },
1326 { /* V = Netopia P = Cayman 3342(Annex A)/3352(Annex B) */
1327 USB_DEVICE(0x100d, 0x3342), .driver_info = (unsigned long) &cxacru_cb00
1328 },
1329 {}
1330};
1331
1332MODULE_DEVICE_TABLE(usb, cxacru_usb_ids);
1333
1334static struct usbatm_driver cxacru_driver = {
1335 .driver_name = cxacru_driver_name,
1336 .bind = cxacru_bind,
1337 .heavy_init = cxacru_heavy_init,
1338 .unbind = cxacru_unbind,
1339 .atm_start = cxacru_atm_start,
1340 .atm_stop = cxacru_remove_device_files,
1341 .bulk_in = CXACRU_EP_DATA,
1342 .bulk_out = CXACRU_EP_DATA,
1343 .rx_padding = 3,
1344 .tx_padding = 11,
1345};
1346
1347static int cxacru_usb_probe(struct usb_interface *intf,
1348 const struct usb_device_id *id)
1349{
1350 struct usb_device *usb_dev = interface_to_usbdev(intf);
1351 char buf[15];
1352
1353 /* Avoid ADSL routers (cx82310_eth).
1354 * Abort if bDeviceClass is 0xff and iProduct is "USB NET CARD".
1355 */
1356 if (usb_dev->descriptor.bDeviceClass == USB_CLASS_VENDOR_SPEC
1357 && usb_string(usb_dev, usb_dev->descriptor.iProduct,
1358 buf, sizeof(buf)) > 0) {
1359 if (!strcmp(buf, "USB NET CARD")) {
1360 dev_info(&intf->dev, "ignoring cx82310_eth device\n");
1361 return -ENODEV;
1362 }
1363 }
1364
1365 return usbatm_usb_probe(intf, id, &cxacru_driver);
1366}
1367
1368static struct usb_driver cxacru_usb_driver = {
1369 .name = cxacru_driver_name,
1370 .probe = cxacru_usb_probe,
1371 .disconnect = usbatm_usb_disconnect,
1372 .id_table = cxacru_usb_ids
1373};
1374
1375static int __init cxacru_init(void)
1376{
1377 return usb_register(&cxacru_usb_driver);
1378}
1379
1380static void __exit cxacru_cleanup(void)
1381{
1382 usb_deregister(&cxacru_usb_driver);
1383}
1384
1385module_init(cxacru_init);
1386module_exit(cxacru_cleanup);
1387
1388MODULE_AUTHOR(DRIVER_AUTHOR);
1389MODULE_DESCRIPTION(DRIVER_DESC);
1390MODULE_LICENSE("GPL");
1391MODULE_VERSION(DRIVER_VERSION);
1/******************************************************************************
2 * cxacru.c - driver for USB ADSL modems based on
3 * Conexant AccessRunner chipset
4 *
5 * Copyright (C) 2004 David Woodhouse, Duncan Sands, Roman Kagan
6 * Copyright (C) 2005 Duncan Sands, Roman Kagan (rkagan % mail ! ru)
7 * Copyright (C) 2007 Simon Arlott
8 * Copyright (C) 2009 Simon Arlott
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the Free
12 * Software Foundation; either version 2 of the License, or (at your option)
13 * any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
18 * more details.
19 *
20 * You should have received a copy of the GNU General Public License along with
21 * this program; if not, write to the Free Software Foundation, Inc., 59
22 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 *
24 ******************************************************************************/
25
26/*
27 * Credit is due for Josep Comas, who created the original patch to speedtch.c
28 * to support the different padding used by the AccessRunner (now generalized
29 * into usbatm), and the userspace firmware loading utility.
30 */
31
32#include <linux/module.h>
33#include <linux/moduleparam.h>
34#include <linux/kernel.h>
35#include <linux/timer.h>
36#include <linux/errno.h>
37#include <linux/slab.h>
38#include <linux/device.h>
39#include <linux/firmware.h>
40#include <linux/mutex.h>
41#include <asm/unaligned.h>
42
43#include "usbatm.h"
44
45#define DRIVER_AUTHOR "Roman Kagan, David Woodhouse, Duncan Sands, Simon Arlott"
46#define DRIVER_VERSION "0.4"
47#define DRIVER_DESC "Conexant AccessRunner ADSL USB modem driver"
48
49static const char cxacru_driver_name[] = "cxacru";
50
51#define CXACRU_EP_CMD 0x01 /* Bulk/interrupt in/out */
52#define CXACRU_EP_DATA 0x02 /* Bulk in/out */
53
54#define CMD_PACKET_SIZE 64 /* Should be maxpacket(ep)? */
55#define CMD_MAX_CONFIG ((CMD_PACKET_SIZE / 4 - 1) / 2)
56
57/* Addresses */
58#define PLLFCLK_ADDR 0x00350068
59#define PLLBCLK_ADDR 0x0035006c
60#define SDRAMEN_ADDR 0x00350010
61#define FW_ADDR 0x00801000
62#define BR_ADDR 0x00180600
63#define SIG_ADDR 0x00180500
64#define BR_STACK_ADDR 0x00187f10
65
66/* Values */
67#define SDRAM_ENA 0x1
68
69#define CMD_TIMEOUT 2000 /* msecs */
70#define POLL_INTERVAL 1 /* secs */
71
72/* commands for interaction with the modem through the control channel before
73 * firmware is loaded */
74enum cxacru_fw_request {
75 FW_CMD_ERR,
76 FW_GET_VER,
77 FW_READ_MEM,
78 FW_WRITE_MEM,
79 FW_RMW_MEM,
80 FW_CHECKSUM_MEM,
81 FW_GOTO_MEM,
82};
83
84/* commands for interaction with the modem through the control channel once
85 * firmware is loaded */
86enum cxacru_cm_request {
87 CM_REQUEST_UNDEFINED = 0x80,
88 CM_REQUEST_TEST,
89 CM_REQUEST_CHIP_GET_MAC_ADDRESS,
90 CM_REQUEST_CHIP_GET_DP_VERSIONS,
91 CM_REQUEST_CHIP_ADSL_LINE_START,
92 CM_REQUEST_CHIP_ADSL_LINE_STOP,
93 CM_REQUEST_CHIP_ADSL_LINE_GET_STATUS,
94 CM_REQUEST_CHIP_ADSL_LINE_GET_SPEED,
95 CM_REQUEST_CARD_INFO_GET,
96 CM_REQUEST_CARD_DATA_GET,
97 CM_REQUEST_CARD_DATA_SET,
98 CM_REQUEST_COMMAND_HW_IO,
99 CM_REQUEST_INTERFACE_HW_IO,
100 CM_REQUEST_CARD_SERIAL_DATA_PATH_GET,
101 CM_REQUEST_CARD_SERIAL_DATA_PATH_SET,
102 CM_REQUEST_CARD_CONTROLLER_VERSION_GET,
103 CM_REQUEST_CARD_GET_STATUS,
104 CM_REQUEST_CARD_GET_MAC_ADDRESS,
105 CM_REQUEST_CARD_GET_DATA_LINK_STATUS,
106 CM_REQUEST_MAX,
107};
108
109/* commands for interaction with the flash memory
110 *
111 * read: response is the contents of the first 60 bytes of flash memory
112 * write: request contains the 60 bytes of data to write to flash memory
113 * response is the contents of the first 60 bytes of flash memory
114 *
115 * layout: PP PP VV VV MM MM MM MM MM MM ?? ?? SS SS SS SS SS SS SS SS
116 * SS SS SS SS SS SS SS SS 00 00 00 00 00 00 00 00 00 00 00 00
117 * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
118 *
119 * P: le16 USB Product ID
120 * V: le16 USB Vendor ID
121 * M: be48 MAC Address
122 * S: le16 ASCII Serial Number
123 */
124enum cxacru_cm_flash {
125 CM_FLASH_READ = 0xa1,
126 CM_FLASH_WRITE = 0xa2
127};
128
129/* reply codes to the commands above */
130enum cxacru_cm_status {
131 CM_STATUS_UNDEFINED,
132 CM_STATUS_SUCCESS,
133 CM_STATUS_ERROR,
134 CM_STATUS_UNSUPPORTED,
135 CM_STATUS_UNIMPLEMENTED,
136 CM_STATUS_PARAMETER_ERROR,
137 CM_STATUS_DBG_LOOPBACK,
138 CM_STATUS_MAX,
139};
140
141/* indices into CARD_INFO_GET return array */
142enum cxacru_info_idx {
143 CXINF_DOWNSTREAM_RATE,
144 CXINF_UPSTREAM_RATE,
145 CXINF_LINK_STATUS,
146 CXINF_LINE_STATUS,
147 CXINF_MAC_ADDRESS_HIGH,
148 CXINF_MAC_ADDRESS_LOW,
149 CXINF_UPSTREAM_SNR_MARGIN,
150 CXINF_DOWNSTREAM_SNR_MARGIN,
151 CXINF_UPSTREAM_ATTENUATION,
152 CXINF_DOWNSTREAM_ATTENUATION,
153 CXINF_TRANSMITTER_POWER,
154 CXINF_UPSTREAM_BITS_PER_FRAME,
155 CXINF_DOWNSTREAM_BITS_PER_FRAME,
156 CXINF_STARTUP_ATTEMPTS,
157 CXINF_UPSTREAM_CRC_ERRORS,
158 CXINF_DOWNSTREAM_CRC_ERRORS,
159 CXINF_UPSTREAM_FEC_ERRORS,
160 CXINF_DOWNSTREAM_FEC_ERRORS,
161 CXINF_UPSTREAM_HEC_ERRORS,
162 CXINF_DOWNSTREAM_HEC_ERRORS,
163 CXINF_LINE_STARTABLE,
164 CXINF_MODULATION,
165 CXINF_ADSL_HEADEND,
166 CXINF_ADSL_HEADEND_ENVIRONMENT,
167 CXINF_CONTROLLER_VERSION,
168 /* dunno what the missing two mean */
169 CXINF_MAX = 0x1c,
170};
171
172enum cxacru_poll_state {
173 CXPOLL_STOPPING,
174 CXPOLL_STOPPED,
175 CXPOLL_POLLING,
176 CXPOLL_SHUTDOWN
177};
178
179struct cxacru_modem_type {
180 u32 pll_f_clk;
181 u32 pll_b_clk;
182 int boot_rom_patch;
183};
184
185struct cxacru_data {
186 struct usbatm_data *usbatm;
187
188 const struct cxacru_modem_type *modem_type;
189
190 int line_status;
191 struct mutex adsl_state_serialize;
192 int adsl_status;
193 struct delayed_work poll_work;
194 u32 card_info[CXINF_MAX];
195 struct mutex poll_state_serialize;
196 enum cxacru_poll_state poll_state;
197
198 /* contol handles */
199 struct mutex cm_serialize;
200 u8 *rcv_buf;
201 u8 *snd_buf;
202 struct urb *rcv_urb;
203 struct urb *snd_urb;
204 struct completion rcv_done;
205 struct completion snd_done;
206};
207
208static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
209 u8 *wdata, int wsize, u8 *rdata, int rsize);
210static void cxacru_poll_status(struct work_struct *work);
211
212/* Card info exported through sysfs */
213#define CXACRU__ATTR_INIT(_name) \
214static DEVICE_ATTR(_name, S_IRUGO, cxacru_sysfs_show_##_name, NULL)
215
216#define CXACRU_CMD_INIT(_name) \
217static DEVICE_ATTR(_name, S_IWUSR | S_IRUGO, \
218 cxacru_sysfs_show_##_name, cxacru_sysfs_store_##_name)
219
220#define CXACRU_SET_INIT(_name) \
221static DEVICE_ATTR(_name, S_IWUSR, \
222 NULL, cxacru_sysfs_store_##_name)
223
224#define CXACRU_ATTR_INIT(_value, _type, _name) \
225static ssize_t cxacru_sysfs_show_##_name(struct device *dev, \
226 struct device_attribute *attr, char *buf) \
227{ \
228 struct cxacru_data *instance = to_usbatm_driver_data(\
229 to_usb_interface(dev)); \
230\
231 if (instance == NULL) \
232 return -ENODEV; \
233\
234 return cxacru_sysfs_showattr_##_type(instance->card_info[_value], buf); \
235} \
236CXACRU__ATTR_INIT(_name)
237
238#define CXACRU_ATTR_CREATE(_v, _t, _name) CXACRU_DEVICE_CREATE_FILE(_name)
239#define CXACRU_CMD_CREATE(_name) CXACRU_DEVICE_CREATE_FILE(_name)
240#define CXACRU_SET_CREATE(_name) CXACRU_DEVICE_CREATE_FILE(_name)
241#define CXACRU__ATTR_CREATE(_name) CXACRU_DEVICE_CREATE_FILE(_name)
242
243#define CXACRU_ATTR_REMOVE(_v, _t, _name) CXACRU_DEVICE_REMOVE_FILE(_name)
244#define CXACRU_CMD_REMOVE(_name) CXACRU_DEVICE_REMOVE_FILE(_name)
245#define CXACRU_SET_REMOVE(_name) CXACRU_DEVICE_REMOVE_FILE(_name)
246#define CXACRU__ATTR_REMOVE(_name) CXACRU_DEVICE_REMOVE_FILE(_name)
247
248static ssize_t cxacru_sysfs_showattr_u32(u32 value, char *buf)
249{
250 return snprintf(buf, PAGE_SIZE, "%u\n", value);
251}
252
253static ssize_t cxacru_sysfs_showattr_s8(s8 value, char *buf)
254{
255 return snprintf(buf, PAGE_SIZE, "%d\n", value);
256}
257
258static ssize_t cxacru_sysfs_showattr_dB(s16 value, char *buf)
259{
260 if (likely(value >= 0)) {
261 return snprintf(buf, PAGE_SIZE, "%u.%02u\n",
262 value / 100, value % 100);
263 } else {
264 value = -value;
265 return snprintf(buf, PAGE_SIZE, "-%u.%02u\n",
266 value / 100, value % 100);
267 }
268}
269
270static ssize_t cxacru_sysfs_showattr_bool(u32 value, char *buf)
271{
272 static char *str[] = { "no", "yes" };
273 if (unlikely(value >= ARRAY_SIZE(str)))
274 return snprintf(buf, PAGE_SIZE, "%u\n", value);
275 return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
276}
277
278static ssize_t cxacru_sysfs_showattr_LINK(u32 value, char *buf)
279{
280 static char *str[] = { NULL, "not connected", "connected", "lost" };
281 if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL))
282 return snprintf(buf, PAGE_SIZE, "%u\n", value);
283 return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
284}
285
286static ssize_t cxacru_sysfs_showattr_LINE(u32 value, char *buf)
287{
288 static char *str[] = { "down", "attempting to activate",
289 "training", "channel analysis", "exchange", "up",
290 "waiting", "initialising"
291 };
292 if (unlikely(value >= ARRAY_SIZE(str)))
293 return snprintf(buf, PAGE_SIZE, "%u\n", value);
294 return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
295}
296
297static ssize_t cxacru_sysfs_showattr_MODU(u32 value, char *buf)
298{
299 static char *str[] = {
300 "",
301 "ANSI T1.413",
302 "ITU-T G.992.1 (G.DMT)",
303 "ITU-T G.992.2 (G.LITE)"
304 };
305 if (unlikely(value >= ARRAY_SIZE(str)))
306 return snprintf(buf, PAGE_SIZE, "%u\n", value);
307 return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
308}
309
310/*
311 * This could use MAC_ADDRESS_HIGH and MAC_ADDRESS_LOW, but since
312 * this data is already in atm_dev there's no point.
313 *
314 * MAC_ADDRESS_HIGH = 0x????5544
315 * MAC_ADDRESS_LOW = 0x33221100
316 * Where 00-55 are bytes 0-5 of the MAC.
317 */
318static ssize_t cxacru_sysfs_show_mac_address(struct device *dev,
319 struct device_attribute *attr, char *buf)
320{
321 struct cxacru_data *instance = to_usbatm_driver_data(
322 to_usb_interface(dev));
323
324 if (instance == NULL || instance->usbatm->atm_dev == NULL)
325 return -ENODEV;
326
327 return snprintf(buf, PAGE_SIZE, "%pM\n",
328 instance->usbatm->atm_dev->esi);
329}
330
331static ssize_t cxacru_sysfs_show_adsl_state(struct device *dev,
332 struct device_attribute *attr, char *buf)
333{
334 static char *str[] = { "running", "stopped" };
335 struct cxacru_data *instance = to_usbatm_driver_data(
336 to_usb_interface(dev));
337 u32 value;
338
339 if (instance == NULL)
340 return -ENODEV;
341
342 value = instance->card_info[CXINF_LINE_STARTABLE];
343 if (unlikely(value >= ARRAY_SIZE(str)))
344 return snprintf(buf, PAGE_SIZE, "%u\n", value);
345 return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
346}
347
348static ssize_t cxacru_sysfs_store_adsl_state(struct device *dev,
349 struct device_attribute *attr, const char *buf, size_t count)
350{
351 struct cxacru_data *instance = to_usbatm_driver_data(
352 to_usb_interface(dev));
353 int ret;
354 int poll = -1;
355 char str_cmd[8];
356 int len = strlen(buf);
357
358 if (!capable(CAP_NET_ADMIN))
359 return -EACCES;
360
361 ret = sscanf(buf, "%7s", str_cmd);
362 if (ret != 1)
363 return -EINVAL;
364 ret = 0;
365
366 if (instance == NULL)
367 return -ENODEV;
368
369 if (mutex_lock_interruptible(&instance->adsl_state_serialize))
370 return -ERESTARTSYS;
371
372 if (!strcmp(str_cmd, "stop") || !strcmp(str_cmd, "restart")) {
373 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_STOP, NULL, 0, NULL, 0);
374 if (ret < 0) {
375 atm_err(instance->usbatm, "change adsl state:"
376 " CHIP_ADSL_LINE_STOP returned %d\n", ret);
377
378 ret = -EIO;
379 } else {
380 ret = len;
381 poll = CXPOLL_STOPPED;
382 }
383 }
384
385 /* Line status is only updated every second
386 * and the device appears to only react to
387 * START/STOP every second too. Wait 1.5s to
388 * be sure that restart will have an effect. */
389 if (!strcmp(str_cmd, "restart"))
390 msleep(1500);
391
392 if (!strcmp(str_cmd, "start") || !strcmp(str_cmd, "restart")) {
393 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
394 if (ret < 0) {
395 atm_err(instance->usbatm, "change adsl state:"
396 " CHIP_ADSL_LINE_START returned %d\n", ret);
397
398 ret = -EIO;
399 } else {
400 ret = len;
401 poll = CXPOLL_POLLING;
402 }
403 }
404
405 if (!strcmp(str_cmd, "poll")) {
406 ret = len;
407 poll = CXPOLL_POLLING;
408 }
409
410 if (ret == 0) {
411 ret = -EINVAL;
412 poll = -1;
413 }
414
415 if (poll == CXPOLL_POLLING) {
416 mutex_lock(&instance->poll_state_serialize);
417 switch (instance->poll_state) {
418 case CXPOLL_STOPPED:
419 /* start polling */
420 instance->poll_state = CXPOLL_POLLING;
421 break;
422
423 case CXPOLL_STOPPING:
424 /* abort stop request */
425 instance->poll_state = CXPOLL_POLLING;
426 case CXPOLL_POLLING:
427 case CXPOLL_SHUTDOWN:
428 /* don't start polling */
429 poll = -1;
430 }
431 mutex_unlock(&instance->poll_state_serialize);
432 } else if (poll == CXPOLL_STOPPED) {
433 mutex_lock(&instance->poll_state_serialize);
434 /* request stop */
435 if (instance->poll_state == CXPOLL_POLLING)
436 instance->poll_state = CXPOLL_STOPPING;
437 mutex_unlock(&instance->poll_state_serialize);
438 }
439
440 mutex_unlock(&instance->adsl_state_serialize);
441
442 if (poll == CXPOLL_POLLING)
443 cxacru_poll_status(&instance->poll_work.work);
444
445 return ret;
446}
447
448/* CM_REQUEST_CARD_DATA_GET times out, so no show attribute */
449
450static ssize_t cxacru_sysfs_store_adsl_config(struct device *dev,
451 struct device_attribute *attr, const char *buf, size_t count)
452{
453 struct cxacru_data *instance = to_usbatm_driver_data(
454 to_usb_interface(dev));
455 int len = strlen(buf);
456 int ret, pos, num;
457 __le32 data[CMD_PACKET_SIZE / 4];
458
459 if (!capable(CAP_NET_ADMIN))
460 return -EACCES;
461
462 if (instance == NULL)
463 return -ENODEV;
464
465 pos = 0;
466 num = 0;
467 while (pos < len) {
468 int tmp;
469 u32 index;
470 u32 value;
471
472 ret = sscanf(buf + pos, "%x=%x%n", &index, &value, &tmp);
473 if (ret < 2)
474 return -EINVAL;
475 if (index < 0 || index > 0x7f)
476 return -EINVAL;
477 pos += tmp;
478
479 /* skip trailing newline */
480 if (buf[pos] == '\n' && pos == len-1)
481 pos++;
482
483 data[num * 2 + 1] = cpu_to_le32(index);
484 data[num * 2 + 2] = cpu_to_le32(value);
485 num++;
486
487 /* send config values when data buffer is full
488 * or no more data
489 */
490 if (pos >= len || num >= CMD_MAX_CONFIG) {
491 char log[CMD_MAX_CONFIG * 12 + 1]; /* %02x=%08x */
492
493 data[0] = cpu_to_le32(num);
494 ret = cxacru_cm(instance, CM_REQUEST_CARD_DATA_SET,
495 (u8 *) data, 4 + num * 8, NULL, 0);
496 if (ret < 0) {
497 atm_err(instance->usbatm,
498 "set card data returned %d\n", ret);
499 return -EIO;
500 }
501
502 for (tmp = 0; tmp < num; tmp++)
503 snprintf(log + tmp*12, 13, " %02x=%08x",
504 le32_to_cpu(data[tmp * 2 + 1]),
505 le32_to_cpu(data[tmp * 2 + 2]));
506 atm_info(instance->usbatm, "config%s\n", log);
507 num = 0;
508 }
509 }
510
511 return len;
512}
513
514/*
515 * All device attributes are included in CXACRU_ALL_FILES
516 * so that the same list can be used multiple times:
517 * INIT (define the device attributes)
518 * CREATE (create all the device files)
519 * REMOVE (remove all the device files)
520 *
521 * With the last two being defined as needed in the functions
522 * they are used in before calling CXACRU_ALL_FILES()
523 */
524#define CXACRU_ALL_FILES(_action) \
525CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_RATE, u32, downstream_rate); \
526CXACRU_ATTR_##_action(CXINF_UPSTREAM_RATE, u32, upstream_rate); \
527CXACRU_ATTR_##_action(CXINF_LINK_STATUS, LINK, link_status); \
528CXACRU_ATTR_##_action(CXINF_LINE_STATUS, LINE, line_status); \
529CXACRU__ATTR_##_action( mac_address); \
530CXACRU_ATTR_##_action(CXINF_UPSTREAM_SNR_MARGIN, dB, upstream_snr_margin); \
531CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_SNR_MARGIN, dB, downstream_snr_margin); \
532CXACRU_ATTR_##_action(CXINF_UPSTREAM_ATTENUATION, dB, upstream_attenuation); \
533CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_ATTENUATION, dB, downstream_attenuation); \
534CXACRU_ATTR_##_action(CXINF_TRANSMITTER_POWER, s8, transmitter_power); \
535CXACRU_ATTR_##_action(CXINF_UPSTREAM_BITS_PER_FRAME, u32, upstream_bits_per_frame); \
536CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_BITS_PER_FRAME, u32, downstream_bits_per_frame); \
537CXACRU_ATTR_##_action(CXINF_STARTUP_ATTEMPTS, u32, startup_attempts); \
538CXACRU_ATTR_##_action(CXINF_UPSTREAM_CRC_ERRORS, u32, upstream_crc_errors); \
539CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_CRC_ERRORS, u32, downstream_crc_errors); \
540CXACRU_ATTR_##_action(CXINF_UPSTREAM_FEC_ERRORS, u32, upstream_fec_errors); \
541CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_FEC_ERRORS, u32, downstream_fec_errors); \
542CXACRU_ATTR_##_action(CXINF_UPSTREAM_HEC_ERRORS, u32, upstream_hec_errors); \
543CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_HEC_ERRORS, u32, downstream_hec_errors); \
544CXACRU_ATTR_##_action(CXINF_LINE_STARTABLE, bool, line_startable); \
545CXACRU_ATTR_##_action(CXINF_MODULATION, MODU, modulation); \
546CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND, u32, adsl_headend); \
547CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND_ENVIRONMENT, u32, adsl_headend_environment); \
548CXACRU_ATTR_##_action(CXINF_CONTROLLER_VERSION, u32, adsl_controller_version); \
549CXACRU_CMD_##_action( adsl_state); \
550CXACRU_SET_##_action( adsl_config);
551
552CXACRU_ALL_FILES(INIT);
553
554/* the following three functions are stolen from drivers/usb/core/message.c */
555static void cxacru_blocking_completion(struct urb *urb)
556{
557 complete(urb->context);
558}
559
560static void cxacru_timeout_kill(unsigned long data)
561{
562 usb_unlink_urb((struct urb *) data);
563}
564
565static int cxacru_start_wait_urb(struct urb *urb, struct completion *done,
566 int *actual_length)
567{
568 struct timer_list timer;
569
570 init_timer(&timer);
571 timer.expires = jiffies + msecs_to_jiffies(CMD_TIMEOUT);
572 timer.data = (unsigned long) urb;
573 timer.function = cxacru_timeout_kill;
574 add_timer(&timer);
575 wait_for_completion(done);
576 del_timer_sync(&timer);
577
578 if (actual_length)
579 *actual_length = urb->actual_length;
580 return urb->status; /* must read status after completion */
581}
582
583static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
584 u8 *wdata, int wsize, u8 *rdata, int rsize)
585{
586 int ret, actlen;
587 int offb, offd;
588 const int stride = CMD_PACKET_SIZE - 4;
589 u8 *wbuf = instance->snd_buf;
590 u8 *rbuf = instance->rcv_buf;
591 int wbuflen = ((wsize - 1) / stride + 1) * CMD_PACKET_SIZE;
592 int rbuflen = ((rsize - 1) / stride + 1) * CMD_PACKET_SIZE;
593
594 if (wbuflen > PAGE_SIZE || rbuflen > PAGE_SIZE) {
595 if (printk_ratelimit())
596 usb_err(instance->usbatm, "requested transfer size too large (%d, %d)\n",
597 wbuflen, rbuflen);
598 ret = -ENOMEM;
599 goto err;
600 }
601
602 mutex_lock(&instance->cm_serialize);
603
604 /* submit reading urb before the writing one */
605 init_completion(&instance->rcv_done);
606 ret = usb_submit_urb(instance->rcv_urb, GFP_KERNEL);
607 if (ret < 0) {
608 if (printk_ratelimit())
609 usb_err(instance->usbatm, "submit of read urb for cm %#x failed (%d)\n",
610 cm, ret);
611 goto fail;
612 }
613
614 memset(wbuf, 0, wbuflen);
615 /* handle wsize == 0 */
616 wbuf[0] = cm;
617 for (offb = offd = 0; offd < wsize; offd += stride, offb += CMD_PACKET_SIZE) {
618 wbuf[offb] = cm;
619 memcpy(wbuf + offb + 4, wdata + offd, min_t(int, stride, wsize - offd));
620 }
621
622 instance->snd_urb->transfer_buffer_length = wbuflen;
623 init_completion(&instance->snd_done);
624 ret = usb_submit_urb(instance->snd_urb, GFP_KERNEL);
625 if (ret < 0) {
626 if (printk_ratelimit())
627 usb_err(instance->usbatm, "submit of write urb for cm %#x failed (%d)\n",
628 cm, ret);
629 goto fail;
630 }
631
632 ret = cxacru_start_wait_urb(instance->snd_urb, &instance->snd_done, NULL);
633 if (ret < 0) {
634 if (printk_ratelimit())
635 usb_err(instance->usbatm, "send of cm %#x failed (%d)\n", cm, ret);
636 goto fail;
637 }
638
639 ret = cxacru_start_wait_urb(instance->rcv_urb, &instance->rcv_done, &actlen);
640 if (ret < 0) {
641 if (printk_ratelimit())
642 usb_err(instance->usbatm, "receive of cm %#x failed (%d)\n", cm, ret);
643 goto fail;
644 }
645 if (actlen % CMD_PACKET_SIZE || !actlen) {
646 if (printk_ratelimit())
647 usb_err(instance->usbatm, "invalid response length to cm %#x: %d\n",
648 cm, actlen);
649 ret = -EIO;
650 goto fail;
651 }
652
653 /* check the return status and copy the data to the output buffer, if needed */
654 for (offb = offd = 0; offd < rsize && offb < actlen; offb += CMD_PACKET_SIZE) {
655 if (rbuf[offb] != cm) {
656 if (printk_ratelimit())
657 usb_err(instance->usbatm, "wrong cm %#x in response to cm %#x\n",
658 rbuf[offb], cm);
659 ret = -EIO;
660 goto fail;
661 }
662 if (rbuf[offb + 1] != CM_STATUS_SUCCESS) {
663 if (printk_ratelimit())
664 usb_err(instance->usbatm, "response to cm %#x failed: %#x\n",
665 cm, rbuf[offb + 1]);
666 ret = -EIO;
667 goto fail;
668 }
669 if (offd >= rsize)
670 break;
671 memcpy(rdata + offd, rbuf + offb + 4, min_t(int, stride, rsize - offd));
672 offd += stride;
673 }
674
675 ret = offd;
676 usb_dbg(instance->usbatm, "cm %#x\n", cm);
677fail:
678 mutex_unlock(&instance->cm_serialize);
679err:
680 return ret;
681}
682
683static int cxacru_cm_get_array(struct cxacru_data *instance, enum cxacru_cm_request cm,
684 u32 *data, int size)
685{
686 int ret, len;
687 __le32 *buf;
688 int offb;
689 unsigned int offd;
690 const int stride = CMD_PACKET_SIZE / (4 * 2) - 1;
691 int buflen = ((size - 1) / stride + 1 + size * 2) * 4;
692
693 buf = kmalloc(buflen, GFP_KERNEL);
694 if (!buf)
695 return -ENOMEM;
696
697 ret = cxacru_cm(instance, cm, NULL, 0, (u8 *) buf, buflen);
698 if (ret < 0)
699 goto cleanup;
700
701 /* len > 0 && len % 4 == 0 guaranteed by cxacru_cm() */
702 len = ret / 4;
703 for (offb = 0; offb < len; ) {
704 int l = le32_to_cpu(buf[offb++]);
705 if (l < 0 || l > stride || l > (len - offb) / 2) {
706 if (printk_ratelimit())
707 usb_err(instance->usbatm, "invalid data length from cm %#x: %d\n",
708 cm, l);
709 ret = -EIO;
710 goto cleanup;
711 }
712 while (l--) {
713 offd = le32_to_cpu(buf[offb++]);
714 if (offd >= size) {
715 if (printk_ratelimit())
716 usb_err(instance->usbatm, "wrong index %#x in response to cm %#x\n",
717 offd, cm);
718 ret = -EIO;
719 goto cleanup;
720 }
721 data[offd] = le32_to_cpu(buf[offb++]);
722 }
723 }
724
725 ret = 0;
726
727cleanup:
728 kfree(buf);
729 return ret;
730}
731
732static int cxacru_card_status(struct cxacru_data *instance)
733{
734 int ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
735 if (ret < 0) { /* firmware not loaded */
736 usb_dbg(instance->usbatm, "cxacru_adsl_start: CARD_GET_STATUS returned %d\n", ret);
737 return ret;
738 }
739 return 0;
740}
741
742static void cxacru_remove_device_files(struct usbatm_data *usbatm_instance,
743 struct atm_dev *atm_dev)
744{
745 struct usb_interface *intf = usbatm_instance->usb_intf;
746
747 #define CXACRU_DEVICE_REMOVE_FILE(_name) \
748 device_remove_file(&intf->dev, &dev_attr_##_name);
749 CXACRU_ALL_FILES(REMOVE);
750 #undef CXACRU_DEVICE_REMOVE_FILE
751}
752
753static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
754 struct atm_dev *atm_dev)
755{
756 struct cxacru_data *instance = usbatm_instance->driver_data;
757 struct usb_interface *intf = usbatm_instance->usb_intf;
758 int ret;
759 int start_polling = 1;
760
761 dev_dbg(&intf->dev, "%s\n", __func__);
762
763 /* Read MAC address */
764 ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_MAC_ADDRESS, NULL, 0,
765 atm_dev->esi, sizeof(atm_dev->esi));
766 if (ret < 0) {
767 atm_err(usbatm_instance, "cxacru_atm_start: CARD_GET_MAC_ADDRESS returned %d\n", ret);
768 return ret;
769 }
770
771 #define CXACRU_DEVICE_CREATE_FILE(_name) \
772 ret = device_create_file(&intf->dev, &dev_attr_##_name); \
773 if (unlikely(ret)) \
774 goto fail_sysfs;
775 CXACRU_ALL_FILES(CREATE);
776 #undef CXACRU_DEVICE_CREATE_FILE
777
778 /* start ADSL */
779 mutex_lock(&instance->adsl_state_serialize);
780 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
781 if (ret < 0)
782 atm_err(usbatm_instance, "cxacru_atm_start: CHIP_ADSL_LINE_START returned %d\n", ret);
783
784 /* Start status polling */
785 mutex_lock(&instance->poll_state_serialize);
786 switch (instance->poll_state) {
787 case CXPOLL_STOPPED:
788 /* start polling */
789 instance->poll_state = CXPOLL_POLLING;
790 break;
791
792 case CXPOLL_STOPPING:
793 /* abort stop request */
794 instance->poll_state = CXPOLL_POLLING;
795 case CXPOLL_POLLING:
796 case CXPOLL_SHUTDOWN:
797 /* don't start polling */
798 start_polling = 0;
799 }
800 mutex_unlock(&instance->poll_state_serialize);
801 mutex_unlock(&instance->adsl_state_serialize);
802
803 printk(KERN_INFO "%s%d: %s %pM\n", atm_dev->type, atm_dev->number,
804 usbatm_instance->description, atm_dev->esi);
805
806 if (start_polling)
807 cxacru_poll_status(&instance->poll_work.work);
808 return 0;
809
810fail_sysfs:
811 usb_err(usbatm_instance, "cxacru_atm_start: device_create_file failed (%d)\n", ret);
812 cxacru_remove_device_files(usbatm_instance, atm_dev);
813 return ret;
814}
815
816static void cxacru_poll_status(struct work_struct *work)
817{
818 struct cxacru_data *instance =
819 container_of(work, struct cxacru_data, poll_work.work);
820 u32 buf[CXINF_MAX] = {};
821 struct usbatm_data *usbatm = instance->usbatm;
822 struct atm_dev *atm_dev = usbatm->atm_dev;
823 int keep_polling = 1;
824 int ret;
825
826 ret = cxacru_cm_get_array(instance, CM_REQUEST_CARD_INFO_GET, buf, CXINF_MAX);
827 if (ret < 0) {
828 if (ret != -ESHUTDOWN)
829 atm_warn(usbatm, "poll status: error %d\n", ret);
830
831 mutex_lock(&instance->poll_state_serialize);
832 if (instance->poll_state != CXPOLL_SHUTDOWN) {
833 instance->poll_state = CXPOLL_STOPPED;
834
835 if (ret != -ESHUTDOWN)
836 atm_warn(usbatm, "polling disabled, set adsl_state"
837 " to 'start' or 'poll' to resume\n");
838 }
839 mutex_unlock(&instance->poll_state_serialize);
840 goto reschedule;
841 }
842
843 memcpy(instance->card_info, buf, sizeof(instance->card_info));
844
845 if (instance->adsl_status != buf[CXINF_LINE_STARTABLE]) {
846 instance->adsl_status = buf[CXINF_LINE_STARTABLE];
847
848 switch (instance->adsl_status) {
849 case 0:
850 atm_printk(KERN_INFO, usbatm, "ADSL state: running\n");
851 break;
852
853 case 1:
854 atm_printk(KERN_INFO, usbatm, "ADSL state: stopped\n");
855 break;
856
857 default:
858 atm_printk(KERN_INFO, usbatm, "Unknown adsl status %02x\n", instance->adsl_status);
859 break;
860 }
861 }
862
863 if (instance->line_status == buf[CXINF_LINE_STATUS])
864 goto reschedule;
865
866 instance->line_status = buf[CXINF_LINE_STATUS];
867 switch (instance->line_status) {
868 case 0:
869 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
870 atm_info(usbatm, "ADSL line: down\n");
871 break;
872
873 case 1:
874 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
875 atm_info(usbatm, "ADSL line: attempting to activate\n");
876 break;
877
878 case 2:
879 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
880 atm_info(usbatm, "ADSL line: training\n");
881 break;
882
883 case 3:
884 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
885 atm_info(usbatm, "ADSL line: channel analysis\n");
886 break;
887
888 case 4:
889 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
890 atm_info(usbatm, "ADSL line: exchange\n");
891 break;
892
893 case 5:
894 atm_dev->link_rate = buf[CXINF_DOWNSTREAM_RATE] * 1000 / 424;
895 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_FOUND);
896
897 atm_info(usbatm, "ADSL line: up (%d kb/s down | %d kb/s up)\n",
898 buf[CXINF_DOWNSTREAM_RATE], buf[CXINF_UPSTREAM_RATE]);
899 break;
900
901 case 6:
902 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
903 atm_info(usbatm, "ADSL line: waiting\n");
904 break;
905
906 case 7:
907 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
908 atm_info(usbatm, "ADSL line: initializing\n");
909 break;
910
911 default:
912 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_UNKNOWN);
913 atm_info(usbatm, "Unknown line state %02x\n", instance->line_status);
914 break;
915 }
916reschedule:
917
918 mutex_lock(&instance->poll_state_serialize);
919 if (instance->poll_state == CXPOLL_STOPPING &&
920 instance->adsl_status == 1 && /* stopped */
921 instance->line_status == 0) /* down */
922 instance->poll_state = CXPOLL_STOPPED;
923
924 if (instance->poll_state == CXPOLL_STOPPED)
925 keep_polling = 0;
926 mutex_unlock(&instance->poll_state_serialize);
927
928 if (keep_polling)
929 schedule_delayed_work(&instance->poll_work,
930 round_jiffies_relative(POLL_INTERVAL*HZ));
931}
932
933static int cxacru_fw(struct usb_device *usb_dev, enum cxacru_fw_request fw,
934 u8 code1, u8 code2, u32 addr, const u8 *data, int size)
935{
936 int ret;
937 u8 *buf;
938 int offd, offb;
939 const int stride = CMD_PACKET_SIZE - 8;
940
941 buf = (u8 *) __get_free_page(GFP_KERNEL);
942 if (!buf)
943 return -ENOMEM;
944
945 offb = offd = 0;
946 do {
947 int l = min_t(int, stride, size - offd);
948 buf[offb++] = fw;
949 buf[offb++] = l;
950 buf[offb++] = code1;
951 buf[offb++] = code2;
952 put_unaligned(cpu_to_le32(addr), (__le32 *)(buf + offb));
953 offb += 4;
954 addr += l;
955 if (l)
956 memcpy(buf + offb, data + offd, l);
957 if (l < stride)
958 memset(buf + offb + l, 0, stride - l);
959 offb += stride;
960 offd += stride;
961 if ((offb >= PAGE_SIZE) || (offd >= size)) {
962 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
963 buf, offb, NULL, CMD_TIMEOUT);
964 if (ret < 0) {
965 dev_dbg(&usb_dev->dev, "sending fw %#x failed\n", fw);
966 goto cleanup;
967 }
968 offb = 0;
969 }
970 } while (offd < size);
971 dev_dbg(&usb_dev->dev, "sent fw %#x\n", fw);
972
973 ret = 0;
974
975cleanup:
976 free_page((unsigned long) buf);
977 return ret;
978}
979
980static void cxacru_upload_firmware(struct cxacru_data *instance,
981 const struct firmware *fw,
982 const struct firmware *bp)
983{
984 int ret;
985 struct usbatm_data *usbatm = instance->usbatm;
986 struct usb_device *usb_dev = usbatm->usb_dev;
987 __le16 signature[] = { usb_dev->descriptor.idVendor,
988 usb_dev->descriptor.idProduct };
989 __le32 val;
990
991 usb_dbg(usbatm, "%s\n", __func__);
992
993 /* FirmwarePllFClkValue */
994 val = cpu_to_le32(instance->modem_type->pll_f_clk);
995 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLFCLK_ADDR, (u8 *) &val, 4);
996 if (ret) {
997 usb_err(usbatm, "FirmwarePllFClkValue failed: %d\n", ret);
998 return;
999 }
1000
1001 /* FirmwarePllBClkValue */
1002 val = cpu_to_le32(instance->modem_type->pll_b_clk);
1003 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLBCLK_ADDR, (u8 *) &val, 4);
1004 if (ret) {
1005 usb_err(usbatm, "FirmwarePllBClkValue failed: %d\n", ret);
1006 return;
1007 }
1008
1009 /* Enable SDRAM */
1010 val = cpu_to_le32(SDRAM_ENA);
1011 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SDRAMEN_ADDR, (u8 *) &val, 4);
1012 if (ret) {
1013 usb_err(usbatm, "Enable SDRAM failed: %d\n", ret);
1014 return;
1015 }
1016
1017 /* Firmware */
1018 usb_info(usbatm, "loading firmware\n");
1019 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, FW_ADDR, fw->data, fw->size);
1020 if (ret) {
1021 usb_err(usbatm, "Firmware upload failed: %d\n", ret);
1022 return;
1023 }
1024
1025 /* Boot ROM patch */
1026 if (instance->modem_type->boot_rom_patch) {
1027 usb_info(usbatm, "loading boot ROM patch\n");
1028 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_ADDR, bp->data, bp->size);
1029 if (ret) {
1030 usb_err(usbatm, "Boot ROM patching failed: %d\n", ret);
1031 return;
1032 }
1033 }
1034
1035 /* Signature */
1036 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SIG_ADDR, (u8 *) signature, 4);
1037 if (ret) {
1038 usb_err(usbatm, "Signature storing failed: %d\n", ret);
1039 return;
1040 }
1041
1042 usb_info(usbatm, "starting device\n");
1043 if (instance->modem_type->boot_rom_patch) {
1044 val = cpu_to_le32(BR_ADDR);
1045 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_STACK_ADDR, (u8 *) &val, 4);
1046 } else {
1047 ret = cxacru_fw(usb_dev, FW_GOTO_MEM, 0x0, 0x0, FW_ADDR, NULL, 0);
1048 }
1049 if (ret) {
1050 usb_err(usbatm, "Passing control to firmware failed: %d\n", ret);
1051 return;
1052 }
1053
1054 /* Delay to allow firmware to start up. */
1055 msleep_interruptible(1000);
1056
1057 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD));
1058 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD));
1059 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_DATA));
1060 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_DATA));
1061
1062 ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
1063 if (ret < 0) {
1064 usb_err(usbatm, "modem failed to initialize: %d\n", ret);
1065 return;
1066 }
1067}
1068
1069static int cxacru_find_firmware(struct cxacru_data *instance,
1070 char *phase, const struct firmware **fw_p)
1071{
1072 struct usbatm_data *usbatm = instance->usbatm;
1073 struct device *dev = &usbatm->usb_intf->dev;
1074 char buf[16];
1075
1076 sprintf(buf, "cxacru-%s.bin", phase);
1077 usb_dbg(usbatm, "cxacru_find_firmware: looking for %s\n", buf);
1078
1079 if (request_firmware(fw_p, buf, dev)) {
1080 usb_dbg(usbatm, "no stage %s firmware found\n", phase);
1081 return -ENOENT;
1082 }
1083
1084 usb_info(usbatm, "found firmware %s\n", buf);
1085
1086 return 0;
1087}
1088
1089static int cxacru_heavy_init(struct usbatm_data *usbatm_instance,
1090 struct usb_interface *usb_intf)
1091{
1092 const struct firmware *fw, *bp;
1093 struct cxacru_data *instance = usbatm_instance->driver_data;
1094
1095 int ret = cxacru_find_firmware(instance, "fw", &fw);
1096 if (ret) {
1097 usb_warn(usbatm_instance, "firmware (cxacru-fw.bin) unavailable (system misconfigured?)\n");
1098 return ret;
1099 }
1100
1101 if (instance->modem_type->boot_rom_patch) {
1102 ret = cxacru_find_firmware(instance, "bp", &bp);
1103 if (ret) {
1104 usb_warn(usbatm_instance, "boot ROM patch (cxacru-bp.bin) unavailable (system misconfigured?)\n");
1105 release_firmware(fw);
1106 return ret;
1107 }
1108 }
1109
1110 cxacru_upload_firmware(instance, fw, bp);
1111
1112 if (instance->modem_type->boot_rom_patch)
1113 release_firmware(bp);
1114 release_firmware(fw);
1115
1116 ret = cxacru_card_status(instance);
1117 if (ret)
1118 usb_dbg(usbatm_instance, "modem initialisation failed\n");
1119 else
1120 usb_dbg(usbatm_instance, "done setting up the modem\n");
1121
1122 return ret;
1123}
1124
1125static int cxacru_bind(struct usbatm_data *usbatm_instance,
1126 struct usb_interface *intf, const struct usb_device_id *id)
1127{
1128 struct cxacru_data *instance;
1129 struct usb_device *usb_dev = interface_to_usbdev(intf);
1130 struct usb_host_endpoint *cmd_ep = usb_dev->ep_in[CXACRU_EP_CMD];
1131 int ret;
1132
1133 /* instance init */
1134 instance = kzalloc(sizeof(*instance), GFP_KERNEL);
1135 if (!instance) {
1136 usb_dbg(usbatm_instance, "cxacru_bind: no memory for instance data\n");
1137 return -ENOMEM;
1138 }
1139
1140 instance->usbatm = usbatm_instance;
1141 instance->modem_type = (struct cxacru_modem_type *) id->driver_info;
1142
1143 mutex_init(&instance->poll_state_serialize);
1144 instance->poll_state = CXPOLL_STOPPED;
1145 instance->line_status = -1;
1146 instance->adsl_status = -1;
1147
1148 mutex_init(&instance->adsl_state_serialize);
1149
1150 instance->rcv_buf = (u8 *) __get_free_page(GFP_KERNEL);
1151 if (!instance->rcv_buf) {
1152 usb_dbg(usbatm_instance, "cxacru_bind: no memory for rcv_buf\n");
1153 ret = -ENOMEM;
1154 goto fail;
1155 }
1156 instance->snd_buf = (u8 *) __get_free_page(GFP_KERNEL);
1157 if (!instance->snd_buf) {
1158 usb_dbg(usbatm_instance, "cxacru_bind: no memory for snd_buf\n");
1159 ret = -ENOMEM;
1160 goto fail;
1161 }
1162 instance->rcv_urb = usb_alloc_urb(0, GFP_KERNEL);
1163 if (!instance->rcv_urb) {
1164 usb_dbg(usbatm_instance, "cxacru_bind: no memory for rcv_urb\n");
1165 ret = -ENOMEM;
1166 goto fail;
1167 }
1168 instance->snd_urb = usb_alloc_urb(0, GFP_KERNEL);
1169 if (!instance->snd_urb) {
1170 usb_dbg(usbatm_instance, "cxacru_bind: no memory for snd_urb\n");
1171 ret = -ENOMEM;
1172 goto fail;
1173 }
1174
1175 if (!cmd_ep) {
1176 usb_dbg(usbatm_instance, "cxacru_bind: no command endpoint\n");
1177 ret = -ENODEV;
1178 goto fail;
1179 }
1180
1181 if ((cmd_ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1182 == USB_ENDPOINT_XFER_INT) {
1183 usb_fill_int_urb(instance->rcv_urb,
1184 usb_dev, usb_rcvintpipe(usb_dev, CXACRU_EP_CMD),
1185 instance->rcv_buf, PAGE_SIZE,
1186 cxacru_blocking_completion, &instance->rcv_done, 1);
1187
1188 usb_fill_int_urb(instance->snd_urb,
1189 usb_dev, usb_sndintpipe(usb_dev, CXACRU_EP_CMD),
1190 instance->snd_buf, PAGE_SIZE,
1191 cxacru_blocking_completion, &instance->snd_done, 4);
1192 } else {
1193 usb_fill_bulk_urb(instance->rcv_urb,
1194 usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD),
1195 instance->rcv_buf, PAGE_SIZE,
1196 cxacru_blocking_completion, &instance->rcv_done);
1197
1198 usb_fill_bulk_urb(instance->snd_urb,
1199 usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
1200 instance->snd_buf, PAGE_SIZE,
1201 cxacru_blocking_completion, &instance->snd_done);
1202 }
1203
1204 mutex_init(&instance->cm_serialize);
1205
1206 INIT_DELAYED_WORK(&instance->poll_work, cxacru_poll_status);
1207
1208 usbatm_instance->driver_data = instance;
1209
1210 usbatm_instance->flags = (cxacru_card_status(instance) ? 0 : UDSL_SKIP_HEAVY_INIT);
1211
1212 return 0;
1213
1214 fail:
1215 free_page((unsigned long) instance->snd_buf);
1216 free_page((unsigned long) instance->rcv_buf);
1217 usb_free_urb(instance->snd_urb);
1218 usb_free_urb(instance->rcv_urb);
1219 kfree(instance);
1220
1221 return ret;
1222}
1223
1224static void cxacru_unbind(struct usbatm_data *usbatm_instance,
1225 struct usb_interface *intf)
1226{
1227 struct cxacru_data *instance = usbatm_instance->driver_data;
1228 int is_polling = 1;
1229
1230 usb_dbg(usbatm_instance, "cxacru_unbind entered\n");
1231
1232 if (!instance) {
1233 usb_dbg(usbatm_instance, "cxacru_unbind: NULL instance!\n");
1234 return;
1235 }
1236
1237 mutex_lock(&instance->poll_state_serialize);
1238 BUG_ON(instance->poll_state == CXPOLL_SHUTDOWN);
1239
1240 /* ensure that status polling continues unless
1241 * it has already stopped */
1242 if (instance->poll_state == CXPOLL_STOPPED)
1243 is_polling = 0;
1244
1245 /* stop polling from being stopped or started */
1246 instance->poll_state = CXPOLL_SHUTDOWN;
1247 mutex_unlock(&instance->poll_state_serialize);
1248
1249 if (is_polling)
1250 cancel_delayed_work_sync(&instance->poll_work);
1251
1252 usb_kill_urb(instance->snd_urb);
1253 usb_kill_urb(instance->rcv_urb);
1254 usb_free_urb(instance->snd_urb);
1255 usb_free_urb(instance->rcv_urb);
1256
1257 free_page((unsigned long) instance->snd_buf);
1258 free_page((unsigned long) instance->rcv_buf);
1259
1260 kfree(instance);
1261
1262 usbatm_instance->driver_data = NULL;
1263}
1264
1265static const struct cxacru_modem_type cxacru_cafe = {
1266 .pll_f_clk = 0x02d874df,
1267 .pll_b_clk = 0x0196a51a,
1268 .boot_rom_patch = 1,
1269};
1270
1271static const struct cxacru_modem_type cxacru_cb00 = {
1272 .pll_f_clk = 0x5,
1273 .pll_b_clk = 0x3,
1274 .boot_rom_patch = 0,
1275};
1276
1277static const struct usb_device_id cxacru_usb_ids[] = {
1278 { /* V = Conexant P = ADSL modem (Euphrates project) */
1279 USB_DEVICE(0x0572, 0xcafe), .driver_info = (unsigned long) &cxacru_cafe
1280 },
1281 { /* V = Conexant P = ADSL modem (Hasbani project) */
1282 USB_DEVICE(0x0572, 0xcb00), .driver_info = (unsigned long) &cxacru_cb00
1283 },
1284 { /* V = Conexant P = ADSL modem */
1285 USB_DEVICE(0x0572, 0xcb01), .driver_info = (unsigned long) &cxacru_cb00
1286 },
1287 { /* V = Conexant P = ADSL modem (Well PTI-800) */
1288 USB_DEVICE(0x0572, 0xcb02), .driver_info = (unsigned long) &cxacru_cb00
1289 },
1290 { /* V = Conexant P = ADSL modem */
1291 USB_DEVICE(0x0572, 0xcb06), .driver_info = (unsigned long) &cxacru_cb00
1292 },
1293 { /* V = Conexant P = ADSL modem (ZTE ZXDSL 852) */
1294 USB_DEVICE(0x0572, 0xcb07), .driver_info = (unsigned long) &cxacru_cb00
1295 },
1296 { /* V = Olitec P = ADSL modem version 2 */
1297 USB_DEVICE(0x08e3, 0x0100), .driver_info = (unsigned long) &cxacru_cafe
1298 },
1299 { /* V = Olitec P = ADSL modem version 3 */
1300 USB_DEVICE(0x08e3, 0x0102), .driver_info = (unsigned long) &cxacru_cb00
1301 },
1302 { /* V = Trust/Amigo Technology Co. P = AMX-CA86U */
1303 USB_DEVICE(0x0eb0, 0x3457), .driver_info = (unsigned long) &cxacru_cafe
1304 },
1305 { /* V = Zoom P = 5510 */
1306 USB_DEVICE(0x1803, 0x5510), .driver_info = (unsigned long) &cxacru_cb00
1307 },
1308 { /* V = Draytek P = Vigor 318 */
1309 USB_DEVICE(0x0675, 0x0200), .driver_info = (unsigned long) &cxacru_cb00
1310 },
1311 { /* V = Zyxel P = 630-C1 aka OMNI ADSL USB (Annex A) */
1312 USB_DEVICE(0x0586, 0x330a), .driver_info = (unsigned long) &cxacru_cb00
1313 },
1314 { /* V = Zyxel P = 630-C3 aka OMNI ADSL USB (Annex B) */
1315 USB_DEVICE(0x0586, 0x330b), .driver_info = (unsigned long) &cxacru_cb00
1316 },
1317 { /* V = Aethra P = Starmodem UM1020 */
1318 USB_DEVICE(0x0659, 0x0020), .driver_info = (unsigned long) &cxacru_cb00
1319 },
1320 { /* V = Aztech Systems P = ? AKA Pirelli AUA-010 */
1321 USB_DEVICE(0x0509, 0x0812), .driver_info = (unsigned long) &cxacru_cb00
1322 },
1323 { /* V = Netopia P = Cayman 3341(Annex A)/3351(Annex B) */
1324 USB_DEVICE(0x100d, 0xcb01), .driver_info = (unsigned long) &cxacru_cb00
1325 },
1326 { /* V = Netopia P = Cayman 3342(Annex A)/3352(Annex B) */
1327 USB_DEVICE(0x100d, 0x3342), .driver_info = (unsigned long) &cxacru_cb00
1328 },
1329 {}
1330};
1331
1332MODULE_DEVICE_TABLE(usb, cxacru_usb_ids);
1333
1334static struct usbatm_driver cxacru_driver = {
1335 .driver_name = cxacru_driver_name,
1336 .bind = cxacru_bind,
1337 .heavy_init = cxacru_heavy_init,
1338 .unbind = cxacru_unbind,
1339 .atm_start = cxacru_atm_start,
1340 .atm_stop = cxacru_remove_device_files,
1341 .bulk_in = CXACRU_EP_DATA,
1342 .bulk_out = CXACRU_EP_DATA,
1343 .rx_padding = 3,
1344 .tx_padding = 11,
1345};
1346
1347static int cxacru_usb_probe(struct usb_interface *intf,
1348 const struct usb_device_id *id)
1349{
1350 struct usb_device *usb_dev = interface_to_usbdev(intf);
1351 char buf[15];
1352
1353 /* Avoid ADSL routers (cx82310_eth).
1354 * Abort if bDeviceClass is 0xff and iProduct is "USB NET CARD".
1355 */
1356 if (usb_dev->descriptor.bDeviceClass == USB_CLASS_VENDOR_SPEC
1357 && usb_string(usb_dev, usb_dev->descriptor.iProduct,
1358 buf, sizeof(buf)) > 0) {
1359 if (!strcmp(buf, "USB NET CARD")) {
1360 dev_info(&intf->dev, "ignoring cx82310_eth device\n");
1361 return -ENODEV;
1362 }
1363 }
1364
1365 return usbatm_usb_probe(intf, id, &cxacru_driver);
1366}
1367
1368static struct usb_driver cxacru_usb_driver = {
1369 .name = cxacru_driver_name,
1370 .probe = cxacru_usb_probe,
1371 .disconnect = usbatm_usb_disconnect,
1372 .id_table = cxacru_usb_ids
1373};
1374
1375module_usb_driver(cxacru_usb_driver);
1376
1377MODULE_AUTHOR(DRIVER_AUTHOR);
1378MODULE_DESCRIPTION(DRIVER_DESC);
1379MODULE_LICENSE("GPL");
1380MODULE_VERSION(DRIVER_VERSION);