1 // SPDX-License-Identifier: GPL-2.0+
2 /******************************************************************************
3 * cxacru.c - driver for USB ADSL modems based on
4 * Conexant AccessRunner chipset
5 *
6 * Copyright (C) 2004 David Woodhouse, Duncan Sands, Roman Kagan
7 * Copyright (C) 2005 Duncan Sands, Roman Kagan (rkagan % mail ! ru)
8 * Copyright (C) 2007 Simon Arlott
9 * Copyright (C) 2009 Simon Arlott
10 ******************************************************************************/
11
12 /*
13 * Credit is due for Josep Comas, who created the original patch to speedtch.c
14 * to support the different padding used by the AccessRunner (now generalized
15 * into usbatm), and the userspace firmware loading utility.
16 */
17
18 #include <linux/module.h>
19 #include <linux/moduleparam.h>
20 #include <linux/kernel.h>
21 #include <linux/timer.h>
22 #include <linux/errno.h>
23 #include <linux/slab.h>
24 #include <linux/device.h>
25 #include <linux/firmware.h>
26 #include <linux/mutex.h>
27 #include <linux/unaligned.h>
28
29 #include "usbatm.h"
30
31 #define DRIVER_AUTHOR "Roman Kagan, David Woodhouse, Duncan Sands, Simon Arlott"
32 #define DRIVER_DESC "Conexant AccessRunner ADSL USB modem driver"
33
34 static const char cxacru_driver_name[] = "cxacru";
35
36 #define CXACRU_EP_CMD 0x01 /* Bulk/interrupt in/out */
37 #define CXACRU_EP_DATA 0x02 /* Bulk in/out */
38
39 #define CMD_PACKET_SIZE 64 /* Should be maxpacket(ep)? */
40 #define CMD_MAX_CONFIG ((CMD_PACKET_SIZE / 4 - 1) / 2)
41
42 /* Addresses */
43 #define PLLFCLK_ADDR 0x00350068
44 #define PLLBCLK_ADDR 0x0035006c
45 #define SDRAMEN_ADDR 0x00350010
46 #define FW_ADDR 0x00801000
47 #define BR_ADDR 0x00180600
48 #define SIG_ADDR 0x00180500
49 #define BR_STACK_ADDR 0x00187f10
50
51 /* Values */
52 #define SDRAM_ENA 0x1
53
54 #define CMD_TIMEOUT 2000 /* msecs */
55 #define POLL_INTERVAL 1 /* secs */
56
57 /* commands for interaction with the modem through the control channel before
58 * firmware is loaded */
59 enum cxacru_fw_request {
60 FW_CMD_ERR,
61 FW_GET_VER,
62 FW_READ_MEM,
63 FW_WRITE_MEM,
64 FW_RMW_MEM,
65 FW_CHECKSUM_MEM,
66 FW_GOTO_MEM,
67 };
68
69 /* commands for interaction with the modem through the control channel once
70 * firmware is loaded */
71 enum cxacru_cm_request {
72 CM_REQUEST_UNDEFINED = 0x80,
73 CM_REQUEST_TEST,
74 CM_REQUEST_CHIP_GET_MAC_ADDRESS,
75 CM_REQUEST_CHIP_GET_DP_VERSIONS,
76 CM_REQUEST_CHIP_ADSL_LINE_START,
77 CM_REQUEST_CHIP_ADSL_LINE_STOP,
78 CM_REQUEST_CHIP_ADSL_LINE_GET_STATUS,
79 CM_REQUEST_CHIP_ADSL_LINE_GET_SPEED,
80 CM_REQUEST_CARD_INFO_GET,
81 CM_REQUEST_CARD_DATA_GET,
82 CM_REQUEST_CARD_DATA_SET,
83 CM_REQUEST_COMMAND_HW_IO,
84 CM_REQUEST_INTERFACE_HW_IO,
85 CM_REQUEST_CARD_SERIAL_DATA_PATH_GET,
86 CM_REQUEST_CARD_SERIAL_DATA_PATH_SET,
87 CM_REQUEST_CARD_CONTROLLER_VERSION_GET,
88 CM_REQUEST_CARD_GET_STATUS,
89 CM_REQUEST_CARD_GET_MAC_ADDRESS,
90 CM_REQUEST_CARD_GET_DATA_LINK_STATUS,
91 CM_REQUEST_MAX,
92 };
93
94 /* commands for interaction with the flash memory
95 *
96 * read: response is the contents of the first 60 bytes of flash memory
97 * write: request contains the 60 bytes of data to write to flash memory
98 * response is the contents of the first 60 bytes of flash memory
99 *
100 * layout: PP PP VV VV MM MM MM MM MM MM ?? ?? SS SS SS SS SS SS SS SS
101 * SS SS SS SS SS SS SS SS 00 00 00 00 00 00 00 00 00 00 00 00
102 * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
103 *
104 * P: le16 USB Product ID
105 * V: le16 USB Vendor ID
106 * M: be48 MAC Address
107 * S: le16 ASCII Serial Number
108 */
109 enum cxacru_cm_flash {
110 CM_FLASH_READ = 0xa1,
111 CM_FLASH_WRITE = 0xa2
112 };
113
114 /* reply codes to the commands above */
115 enum cxacru_cm_status {
116 CM_STATUS_UNDEFINED,
117 CM_STATUS_SUCCESS,
118 CM_STATUS_ERROR,
119 CM_STATUS_UNSUPPORTED,
120 CM_STATUS_UNIMPLEMENTED,
121 CM_STATUS_PARAMETER_ERROR,
122 CM_STATUS_DBG_LOOPBACK,
123 CM_STATUS_MAX,
124 };
125
126 /* indices into CARD_INFO_GET return array */
127 enum cxacru_info_idx {
128 CXINF_DOWNSTREAM_RATE,
129 CXINF_UPSTREAM_RATE,
130 CXINF_LINK_STATUS,
131 CXINF_LINE_STATUS,
132 CXINF_MAC_ADDRESS_HIGH,
133 CXINF_MAC_ADDRESS_LOW,
134 CXINF_UPSTREAM_SNR_MARGIN,
135 CXINF_DOWNSTREAM_SNR_MARGIN,
136 CXINF_UPSTREAM_ATTENUATION,
137 CXINF_DOWNSTREAM_ATTENUATION,
138 CXINF_TRANSMITTER_POWER,
139 CXINF_UPSTREAM_BITS_PER_FRAME,
140 CXINF_DOWNSTREAM_BITS_PER_FRAME,
141 CXINF_STARTUP_ATTEMPTS,
142 CXINF_UPSTREAM_CRC_ERRORS,
143 CXINF_DOWNSTREAM_CRC_ERRORS,
144 CXINF_UPSTREAM_FEC_ERRORS,
145 CXINF_DOWNSTREAM_FEC_ERRORS,
146 CXINF_UPSTREAM_HEC_ERRORS,
147 CXINF_DOWNSTREAM_HEC_ERRORS,
148 CXINF_LINE_STARTABLE,
149 CXINF_MODULATION,
150 CXINF_ADSL_HEADEND,
151 CXINF_ADSL_HEADEND_ENVIRONMENT,
152 CXINF_CONTROLLER_VERSION,
153 /* dunno what the missing two mean */
154 CXINF_MAX = 0x1c,
155 };
156
157 enum cxacru_poll_state {
158 CXPOLL_STOPPING,
159 CXPOLL_STOPPED,
160 CXPOLL_POLLING,
161 CXPOLL_SHUTDOWN
162 };
163
164 struct cxacru_modem_type {
165 u32 pll_f_clk;
166 u32 pll_b_clk;
167 int boot_rom_patch;
168 };
169
170 struct cxacru_data {
171 struct usbatm_data *usbatm;
172
173 const struct cxacru_modem_type *modem_type;
174
175 int line_status;
176 struct mutex adsl_state_serialize;
177 int adsl_status;
178 struct delayed_work poll_work;
179 u32 card_info[CXINF_MAX];
180 struct mutex poll_state_serialize;
181 enum cxacru_poll_state poll_state;
182
183 /* control handles */
184 struct mutex cm_serialize;
185 u8 *rcv_buf;
186 u8 *snd_buf;
187 struct urb *rcv_urb;
188 struct urb *snd_urb;
189 struct completion rcv_done;
190 struct completion snd_done;
191 };
192
193 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
194 u8 *wdata, int wsize, u8 *rdata, int rsize);
195 static void cxacru_poll_status(struct work_struct *work);
196
197 /* Card info exported through sysfs */
198 #define CXACRU__ATTR_INIT(_name) \
199 static DEVICE_ATTR_RO(_name)
200
201 #define CXACRU_CMD_INIT(_name) \
202 static DEVICE_ATTR_RW(_name)
203
204 #define CXACRU_SET_INIT(_name) \
205 static DEVICE_ATTR_WO(_name)
206
207 #define CXACRU_ATTR_INIT(_value, _type, _name) \
208 static ssize_t _name##_show(struct device *dev, \
209 struct device_attribute *attr, char *buf) \
210 { \
211 struct cxacru_data *instance = to_usbatm_driver_data(\
212 to_usb_interface(dev)); \
213 \
214 if (instance == NULL) \
215 return -ENODEV; \
216 \
217 return cxacru_sysfs_showattr_##_type(instance->card_info[_value], buf); \
218 } \
219 CXACRU__ATTR_INIT(_name)
220
221 #define CXACRU_ATTR_CREATE(_v, _t, _name) CXACRU_DEVICE_CREATE_FILE(_name)
222 #define CXACRU_CMD_CREATE(_name) CXACRU_DEVICE_CREATE_FILE(_name)
223 #define CXACRU_SET_CREATE(_name) CXACRU_DEVICE_CREATE_FILE(_name)
224 #define CXACRU__ATTR_CREATE(_name) CXACRU_DEVICE_CREATE_FILE(_name)
225
226 #define CXACRU_ATTR_REMOVE(_v, _t, _name) CXACRU_DEVICE_REMOVE_FILE(_name)
227 #define CXACRU_CMD_REMOVE(_name) CXACRU_DEVICE_REMOVE_FILE(_name)
228 #define CXACRU_SET_REMOVE(_name) CXACRU_DEVICE_REMOVE_FILE(_name)
229 #define CXACRU__ATTR_REMOVE(_name) CXACRU_DEVICE_REMOVE_FILE(_name)
230
cxacru_sysfs_showattr_u32(u32 value,char * buf)231 static ssize_t cxacru_sysfs_showattr_u32(u32 value, char *buf)
232 {
233 return sprintf(buf, "%u\n", value);
234 }
235
cxacru_sysfs_showattr_s8(s8 value,char * buf)236 static ssize_t cxacru_sysfs_showattr_s8(s8 value, char *buf)
237 {
238 return sprintf(buf, "%d\n", value);
239 }
240
cxacru_sysfs_showattr_dB(s16 value,char * buf)241 static ssize_t cxacru_sysfs_showattr_dB(s16 value, char *buf)
242 {
243 if (likely(value >= 0)) {
244 return snprintf(buf, PAGE_SIZE, "%u.%02u\n",
245 value / 100, value % 100);
246 } else {
247 value = -value;
248 return snprintf(buf, PAGE_SIZE, "-%u.%02u\n",
249 value / 100, value % 100);
250 }
251 }
252
cxacru_sysfs_showattr_bool(u32 value,char * buf)253 static ssize_t cxacru_sysfs_showattr_bool(u32 value, char *buf)
254 {
255 static char *str[] = { "no", "yes" };
256
257 if (unlikely(value >= ARRAY_SIZE(str)))
258 return sprintf(buf, "%u\n", value);
259 return sprintf(buf, "%s\n", str[value]);
260 }
261
cxacru_sysfs_showattr_LINK(u32 value,char * buf)262 static ssize_t cxacru_sysfs_showattr_LINK(u32 value, char *buf)
263 {
264 static char *str[] = { NULL, "not connected", "connected", "lost" };
265
266 if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL))
267 return sprintf(buf, "%u\n", value);
268 return sprintf(buf, "%s\n", str[value]);
269 }
270
cxacru_sysfs_showattr_LINE(u32 value,char * buf)271 static ssize_t cxacru_sysfs_showattr_LINE(u32 value, char *buf)
272 {
273 static char *str[] = { "down", "attempting to activate",
274 "training", "channel analysis", "exchange", "up",
275 "waiting", "initialising"
276 };
277 if (unlikely(value >= ARRAY_SIZE(str)))
278 return sprintf(buf, "%u\n", value);
279 return sprintf(buf, "%s\n", str[value]);
280 }
281
cxacru_sysfs_showattr_MODU(u32 value,char * buf)282 static ssize_t cxacru_sysfs_showattr_MODU(u32 value, char *buf)
283 {
284 static char *str[] = {
285 "",
286 "ANSI T1.413",
287 "ITU-T G.992.1 (G.DMT)",
288 "ITU-T G.992.2 (G.LITE)"
289 };
290 if (unlikely(value >= ARRAY_SIZE(str)))
291 return sprintf(buf, "%u\n", value);
292 return sprintf(buf, "%s\n", str[value]);
293 }
294
295 /*
296 * This could use MAC_ADDRESS_HIGH and MAC_ADDRESS_LOW, but since
297 * this data is already in atm_dev there's no point.
298 *
299 * MAC_ADDRESS_HIGH = 0x????5544
300 * MAC_ADDRESS_LOW = 0x33221100
301 * Where 00-55 are bytes 0-5 of the MAC.
302 */
mac_address_show(struct device * dev,struct device_attribute * attr,char * buf)303 static ssize_t mac_address_show(struct device *dev,
304 struct device_attribute *attr, char *buf)
305 {
306 struct cxacru_data *instance = to_usbatm_driver_data(
307 to_usb_interface(dev));
308
309 if (instance == NULL || instance->usbatm->atm_dev == NULL)
310 return -ENODEV;
311
312 return sprintf(buf, "%pM\n", instance->usbatm->atm_dev->esi);
313 }
314
adsl_state_show(struct device * dev,struct device_attribute * attr,char * buf)315 static ssize_t adsl_state_show(struct device *dev,
316 struct device_attribute *attr, char *buf)
317 {
318 static char *str[] = { "running", "stopped" };
319 struct cxacru_data *instance = to_usbatm_driver_data(
320 to_usb_interface(dev));
321 u32 value;
322
323 if (instance == NULL)
324 return -ENODEV;
325
326 value = instance->card_info[CXINF_LINE_STARTABLE];
327 if (unlikely(value >= ARRAY_SIZE(str)))
328 return sprintf(buf, "%u\n", value);
329 return sprintf(buf, "%s\n", str[value]);
330 }
331
adsl_state_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)332 static ssize_t adsl_state_store(struct device *dev,
333 struct device_attribute *attr, const char *buf, size_t count)
334 {
335 struct cxacru_data *instance = to_usbatm_driver_data(
336 to_usb_interface(dev));
337 int ret;
338 int poll = -1;
339 char str_cmd[8];
340 int len = strlen(buf);
341
342 if (!capable(CAP_NET_ADMIN))
343 return -EACCES;
344
345 ret = sscanf(buf, "%7s", str_cmd);
346 if (ret != 1)
347 return -EINVAL;
348 ret = 0;
349
350 if (instance == NULL)
351 return -ENODEV;
352
353 if (mutex_lock_interruptible(&instance->adsl_state_serialize))
354 return -ERESTARTSYS;
355
356 if (!strcmp(str_cmd, "stop") || !strcmp(str_cmd, "restart")) {
357 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_STOP, NULL, 0, NULL, 0);
358 if (ret < 0) {
359 atm_err(instance->usbatm, "change adsl state:"
360 " CHIP_ADSL_LINE_STOP returned %d\n", ret);
361
362 ret = -EIO;
363 } else {
364 ret = len;
365 poll = CXPOLL_STOPPED;
366 }
367 }
368
369 /* Line status is only updated every second
370 * and the device appears to only react to
371 * START/STOP every second too. Wait 1.5s to
372 * be sure that restart will have an effect. */
373 if (!strcmp(str_cmd, "restart"))
374 msleep(1500);
375
376 if (!strcmp(str_cmd, "start") || !strcmp(str_cmd, "restart")) {
377 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
378 if (ret < 0) {
379 atm_err(instance->usbatm, "change adsl state:"
380 " CHIP_ADSL_LINE_START returned %d\n", ret);
381
382 ret = -EIO;
383 } else {
384 ret = len;
385 poll = CXPOLL_POLLING;
386 }
387 }
388
389 if (!strcmp(str_cmd, "poll")) {
390 ret = len;
391 poll = CXPOLL_POLLING;
392 }
393
394 if (ret == 0) {
395 ret = -EINVAL;
396 poll = -1;
397 }
398
399 if (poll == CXPOLL_POLLING) {
400 mutex_lock(&instance->poll_state_serialize);
401 switch (instance->poll_state) {
402 case CXPOLL_STOPPED:
403 /* start polling */
404 instance->poll_state = CXPOLL_POLLING;
405 break;
406
407 case CXPOLL_STOPPING:
408 /* abort stop request */
409 instance->poll_state = CXPOLL_POLLING;
410 fallthrough;
411 case CXPOLL_POLLING:
412 case CXPOLL_SHUTDOWN:
413 /* don't start polling */
414 poll = -1;
415 }
416 mutex_unlock(&instance->poll_state_serialize);
417 } else if (poll == CXPOLL_STOPPED) {
418 mutex_lock(&instance->poll_state_serialize);
419 /* request stop */
420 if (instance->poll_state == CXPOLL_POLLING)
421 instance->poll_state = CXPOLL_STOPPING;
422 mutex_unlock(&instance->poll_state_serialize);
423 }
424
425 mutex_unlock(&instance->adsl_state_serialize);
426
427 if (poll == CXPOLL_POLLING)
428 cxacru_poll_status(&instance->poll_work.work);
429
430 return ret;
431 }
432
433 /* CM_REQUEST_CARD_DATA_GET times out, so no show attribute */
434
adsl_config_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)435 static ssize_t adsl_config_store(struct device *dev,
436 struct device_attribute *attr, const char *buf, size_t count)
437 {
438 struct cxacru_data *instance = to_usbatm_driver_data(
439 to_usb_interface(dev));
440 int len = strlen(buf);
441 int ret, pos, num;
442 __le32 data[CMD_PACKET_SIZE / 4];
443
444 if (!capable(CAP_NET_ADMIN))
445 return -EACCES;
446
447 if (instance == NULL)
448 return -ENODEV;
449
450 pos = 0;
451 num = 0;
452 while (pos < len) {
453 int tmp;
454 u32 index;
455 u32 value;
456
457 ret = sscanf(buf + pos, "%x=%x%n", &index, &value, &tmp);
458 if (ret < 2)
459 return -EINVAL;
460 if (index > 0x7f)
461 return -EINVAL;
462 if (tmp < 0 || tmp > len - pos)
463 return -EINVAL;
464 pos += tmp;
465
466 /* skip trailing newline */
467 if (buf[pos] == '\n' && pos == len-1)
468 pos++;
469
470 data[num * 2 + 1] = cpu_to_le32(index);
471 data[num * 2 + 2] = cpu_to_le32(value);
472 num++;
473
474 /* send config values when data buffer is full
475 * or no more data
476 */
477 if (pos >= len || num >= CMD_MAX_CONFIG) {
478 char log[CMD_MAX_CONFIG * 12 + 1]; /* %02x=%08x */
479
480 data[0] = cpu_to_le32(num);
481 ret = cxacru_cm(instance, CM_REQUEST_CARD_DATA_SET,
482 (u8 *) data, 4 + num * 8, NULL, 0);
483 if (ret < 0) {
484 atm_err(instance->usbatm,
485 "set card data returned %d\n", ret);
486 return -EIO;
487 }
488
489 for (tmp = 0; tmp < num; tmp++)
490 snprintf(log + tmp*12, 13, " %02x=%08x",
491 le32_to_cpu(data[tmp * 2 + 1]),
492 le32_to_cpu(data[tmp * 2 + 2]));
493 atm_info(instance->usbatm, "config%s\n", log);
494 num = 0;
495 }
496 }
497
498 return len;
499 }
500
501 /*
502 * All device attributes are included in CXACRU_ALL_FILES
503 * so that the same list can be used multiple times:
504 * INIT (define the device attributes)
505 * CREATE (create all the device files)
506 * REMOVE (remove all the device files)
507 *
508 * With the last two being defined as needed in the functions
509 * they are used in before calling CXACRU_ALL_FILES()
510 */
511 #define CXACRU_ALL_FILES(_action) \
512 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_RATE, u32, downstream_rate); \
513 CXACRU_ATTR_##_action(CXINF_UPSTREAM_RATE, u32, upstream_rate); \
514 CXACRU_ATTR_##_action(CXINF_LINK_STATUS, LINK, link_status); \
515 CXACRU_ATTR_##_action(CXINF_LINE_STATUS, LINE, line_status); \
516 CXACRU__ATTR_##_action( mac_address); \
517 CXACRU_ATTR_##_action(CXINF_UPSTREAM_SNR_MARGIN, dB, upstream_snr_margin); \
518 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_SNR_MARGIN, dB, downstream_snr_margin); \
519 CXACRU_ATTR_##_action(CXINF_UPSTREAM_ATTENUATION, dB, upstream_attenuation); \
520 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_ATTENUATION, dB, downstream_attenuation); \
521 CXACRU_ATTR_##_action(CXINF_TRANSMITTER_POWER, s8, transmitter_power); \
522 CXACRU_ATTR_##_action(CXINF_UPSTREAM_BITS_PER_FRAME, u32, upstream_bits_per_frame); \
523 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_BITS_PER_FRAME, u32, downstream_bits_per_frame); \
524 CXACRU_ATTR_##_action(CXINF_STARTUP_ATTEMPTS, u32, startup_attempts); \
525 CXACRU_ATTR_##_action(CXINF_UPSTREAM_CRC_ERRORS, u32, upstream_crc_errors); \
526 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_CRC_ERRORS, u32, downstream_crc_errors); \
527 CXACRU_ATTR_##_action(CXINF_UPSTREAM_FEC_ERRORS, u32, upstream_fec_errors); \
528 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_FEC_ERRORS, u32, downstream_fec_errors); \
529 CXACRU_ATTR_##_action(CXINF_UPSTREAM_HEC_ERRORS, u32, upstream_hec_errors); \
530 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_HEC_ERRORS, u32, downstream_hec_errors); \
531 CXACRU_ATTR_##_action(CXINF_LINE_STARTABLE, bool, line_startable); \
532 CXACRU_ATTR_##_action(CXINF_MODULATION, MODU, modulation); \
533 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND, u32, adsl_headend); \
534 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND_ENVIRONMENT, u32, adsl_headend_environment); \
535 CXACRU_ATTR_##_action(CXINF_CONTROLLER_VERSION, u32, adsl_controller_version); \
536 CXACRU_CMD_##_action( adsl_state); \
537 CXACRU_SET_##_action( adsl_config);
538
539 CXACRU_ALL_FILES(INIT);
540
541 static struct attribute *cxacru_attrs[] = {
542 &dev_attr_adsl_config.attr,
543 &dev_attr_adsl_state.attr,
544 &dev_attr_adsl_controller_version.attr,
545 &dev_attr_adsl_headend_environment.attr,
546 &dev_attr_adsl_headend.attr,
547 &dev_attr_modulation.attr,
548 &dev_attr_line_startable.attr,
549 &dev_attr_downstream_hec_errors.attr,
550 &dev_attr_upstream_hec_errors.attr,
551 &dev_attr_downstream_fec_errors.attr,
552 &dev_attr_upstream_fec_errors.attr,
553 &dev_attr_downstream_crc_errors.attr,
554 &dev_attr_upstream_crc_errors.attr,
555 &dev_attr_startup_attempts.attr,
556 &dev_attr_downstream_bits_per_frame.attr,
557 &dev_attr_upstream_bits_per_frame.attr,
558 &dev_attr_transmitter_power.attr,
559 &dev_attr_downstream_attenuation.attr,
560 &dev_attr_upstream_attenuation.attr,
561 &dev_attr_downstream_snr_margin.attr,
562 &dev_attr_upstream_snr_margin.attr,
563 &dev_attr_mac_address.attr,
564 &dev_attr_line_status.attr,
565 &dev_attr_link_status.attr,
566 &dev_attr_upstream_rate.attr,
567 &dev_attr_downstream_rate.attr,
568 NULL,
569 };
570 ATTRIBUTE_GROUPS(cxacru);
571
572 /* the following three functions are stolen from drivers/usb/core/message.c */
cxacru_blocking_completion(struct urb * urb)573 static void cxacru_blocking_completion(struct urb *urb)
574 {
575 complete(urb->context);
576 }
577
578 struct cxacru_timer {
579 struct timer_list timer;
580 struct urb *urb;
581 };
582
cxacru_timeout_kill(struct timer_list * t)583 static void cxacru_timeout_kill(struct timer_list *t)
584 {
585 struct cxacru_timer *timer = timer_container_of(timer, t, timer);
586
587 usb_unlink_urb(timer->urb);
588 }
589
cxacru_start_wait_urb(struct urb * urb,struct completion * done,int * actual_length)590 static int cxacru_start_wait_urb(struct urb *urb, struct completion *done,
591 int *actual_length)
592 {
593 struct cxacru_timer timer = {
594 .urb = urb,
595 };
596
597 timer_setup_on_stack(&timer.timer, cxacru_timeout_kill, 0);
598 mod_timer(&timer.timer, jiffies + msecs_to_jiffies(CMD_TIMEOUT));
599 wait_for_completion(done);
600 timer_delete_sync(&timer.timer);
601 timer_destroy_on_stack(&timer.timer);
602
603 if (actual_length)
604 *actual_length = urb->actual_length;
605 return urb->status; /* must read status after completion */
606 }
607
cxacru_cm(struct cxacru_data * instance,enum cxacru_cm_request cm,u8 * wdata,int wsize,u8 * rdata,int rsize)608 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
609 u8 *wdata, int wsize, u8 *rdata, int rsize)
610 {
611 int ret, actlen;
612 int offb, offd;
613 const int stride = CMD_PACKET_SIZE - 4;
614 u8 *wbuf = instance->snd_buf;
615 u8 *rbuf = instance->rcv_buf;
616 int wbuflen = ((wsize - 1) / stride + 1) * CMD_PACKET_SIZE;
617 int rbuflen = ((rsize - 1) / stride + 1) * CMD_PACKET_SIZE;
618
619 if (wbuflen > PAGE_SIZE || rbuflen > PAGE_SIZE) {
620 if (printk_ratelimit())
621 usb_err(instance->usbatm, "requested transfer size too large (%d, %d)\n",
622 wbuflen, rbuflen);
623 ret = -ENOMEM;
624 goto err;
625 }
626
627 mutex_lock(&instance->cm_serialize);
628
629 /* submit reading urb before the writing one */
630 init_completion(&instance->rcv_done);
631 ret = usb_submit_urb(instance->rcv_urb, GFP_KERNEL);
632 if (ret < 0) {
633 if (printk_ratelimit())
634 usb_err(instance->usbatm, "submit of read urb for cm %#x failed (%d)\n",
635 cm, ret);
636 goto fail;
637 }
638
639 memset(wbuf, 0, wbuflen);
640 /* handle wsize == 0 */
641 wbuf[0] = cm;
642 for (offb = offd = 0; offd < wsize; offd += stride, offb += CMD_PACKET_SIZE) {
643 wbuf[offb] = cm;
644 memcpy(wbuf + offb + 4, wdata + offd, min_t(int, stride, wsize - offd));
645 }
646
647 instance->snd_urb->transfer_buffer_length = wbuflen;
648 init_completion(&instance->snd_done);
649 ret = usb_submit_urb(instance->snd_urb, GFP_KERNEL);
650 if (ret < 0) {
651 if (printk_ratelimit())
652 usb_err(instance->usbatm, "submit of write urb for cm %#x failed (%d)\n",
653 cm, ret);
654 goto fail;
655 }
656
657 ret = cxacru_start_wait_urb(instance->snd_urb, &instance->snd_done, NULL);
658 if (ret < 0) {
659 if (printk_ratelimit())
660 usb_err(instance->usbatm, "send of cm %#x failed (%d)\n", cm, ret);
661 goto fail;
662 }
663
664 ret = cxacru_start_wait_urb(instance->rcv_urb, &instance->rcv_done, &actlen);
665 if (ret < 0) {
666 if (printk_ratelimit())
667 usb_err(instance->usbatm, "receive of cm %#x failed (%d)\n", cm, ret);
668 goto fail;
669 }
670 if (actlen % CMD_PACKET_SIZE || !actlen) {
671 if (printk_ratelimit())
672 usb_err(instance->usbatm, "invalid response length to cm %#x: %d\n",
673 cm, actlen);
674 ret = -EIO;
675 goto fail;
676 }
677
678 /* check the return status and copy the data to the output buffer, if needed */
679 for (offb = offd = 0; offd < rsize && offb < actlen; offb += CMD_PACKET_SIZE) {
680 if (rbuf[offb] != cm) {
681 if (printk_ratelimit())
682 usb_err(instance->usbatm, "wrong cm %#x in response to cm %#x\n",
683 rbuf[offb], cm);
684 ret = -EIO;
685 goto fail;
686 }
687 if (rbuf[offb + 1] != CM_STATUS_SUCCESS) {
688 if (printk_ratelimit())
689 usb_err(instance->usbatm, "response to cm %#x failed: %#x\n",
690 cm, rbuf[offb + 1]);
691 ret = -EIO;
692 goto fail;
693 }
694 if (offd >= rsize)
695 break;
696 memcpy(rdata + offd, rbuf + offb + 4, min_t(int, stride, rsize - offd));
697 offd += stride;
698 }
699
700 ret = offd;
701 usb_dbg(instance->usbatm, "cm %#x\n", cm);
702 fail:
703 if (ret < 0)
704 usb_kill_urb(instance->rcv_urb);
705 mutex_unlock(&instance->cm_serialize);
706 err:
707 return ret;
708 }
709
cxacru_cm_get_array(struct cxacru_data * instance,enum cxacru_cm_request cm,u32 * data,int size)710 static int cxacru_cm_get_array(struct cxacru_data *instance, enum cxacru_cm_request cm,
711 u32 *data, int size)
712 {
713 int ret, len;
714 __le32 *buf;
715 int offb;
716 unsigned int offd;
717 const int stride = CMD_PACKET_SIZE / (4 * 2) - 1;
718 int buflen = ((size - 1) / stride + 1 + size * 2) * 4;
719
720 buf = kmalloc(buflen, GFP_KERNEL);
721 if (!buf)
722 return -ENOMEM;
723
724 ret = cxacru_cm(instance, cm, NULL, 0, (u8 *) buf, buflen);
725 if (ret < 0)
726 goto cleanup;
727
728 /* len > 0 && len % 4 == 0 guaranteed by cxacru_cm() */
729 len = ret / 4;
730 for (offb = 0; offb < len; ) {
731 int l = le32_to_cpu(buf[offb++]);
732
733 if (l < 0 || l > stride || l > (len - offb) / 2) {
734 if (printk_ratelimit())
735 usb_err(instance->usbatm, "invalid data length from cm %#x: %d\n",
736 cm, l);
737 ret = -EIO;
738 goto cleanup;
739 }
740 while (l--) {
741 offd = le32_to_cpu(buf[offb++]);
742 if (offd >= size) {
743 if (printk_ratelimit())
744 usb_err(instance->usbatm, "wrong index %#x in response to cm %#x\n",
745 offd, cm);
746 ret = -EIO;
747 goto cleanup;
748 }
749 data[offd] = le32_to_cpu(buf[offb++]);
750 }
751 }
752
753 ret = 0;
754
755 cleanup:
756 kfree(buf);
757 return ret;
758 }
759
cxacru_card_status(struct cxacru_data * instance)760 static int cxacru_card_status(struct cxacru_data *instance)
761 {
762 int ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
763
764 if (ret < 0) { /* firmware not loaded */
765 usb_dbg(instance->usbatm, "cxacru_adsl_start: CARD_GET_STATUS returned %d\n", ret);
766 return ret;
767 }
768 return 0;
769 }
770
cxacru_atm_start(struct usbatm_data * usbatm_instance,struct atm_dev * atm_dev)771 static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
772 struct atm_dev *atm_dev)
773 {
774 struct cxacru_data *instance = usbatm_instance->driver_data;
775 struct usb_interface *intf = usbatm_instance->usb_intf;
776 int ret;
777 int start_polling = 1;
778
779 dev_dbg(&intf->dev, "%s\n", __func__);
780
781 /* Read MAC address */
782 ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_MAC_ADDRESS, NULL, 0,
783 atm_dev->esi, sizeof(atm_dev->esi));
784 if (ret < 0) {
785 atm_err(usbatm_instance, "cxacru_atm_start: CARD_GET_MAC_ADDRESS returned %d\n", ret);
786 return ret;
787 }
788
789 /* start ADSL */
790 mutex_lock(&instance->adsl_state_serialize);
791 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
792 if (ret < 0)
793 atm_err(usbatm_instance, "cxacru_atm_start: CHIP_ADSL_LINE_START returned %d\n", ret);
794
795 /* Start status polling */
796 mutex_lock(&instance->poll_state_serialize);
797 switch (instance->poll_state) {
798 case CXPOLL_STOPPED:
799 /* start polling */
800 instance->poll_state = CXPOLL_POLLING;
801 break;
802
803 case CXPOLL_STOPPING:
804 /* abort stop request */
805 instance->poll_state = CXPOLL_POLLING;
806 fallthrough;
807 case CXPOLL_POLLING:
808 case CXPOLL_SHUTDOWN:
809 /* don't start polling */
810 start_polling = 0;
811 }
812 mutex_unlock(&instance->poll_state_serialize);
813 mutex_unlock(&instance->adsl_state_serialize);
814
815 if (start_polling)
816 cxacru_poll_status(&instance->poll_work.work);
817 return 0;
818 }
819
cxacru_poll_status(struct work_struct * work)820 static void cxacru_poll_status(struct work_struct *work)
821 {
822 struct cxacru_data *instance =
823 container_of(work, struct cxacru_data, poll_work.work);
824 u32 buf[CXINF_MAX] = {};
825 struct usbatm_data *usbatm = instance->usbatm;
826 struct atm_dev *atm_dev = usbatm->atm_dev;
827 int keep_polling = 1;
828 int ret;
829
830 ret = cxacru_cm_get_array(instance, CM_REQUEST_CARD_INFO_GET, buf, CXINF_MAX);
831 if (ret < 0) {
832 if (ret != -ESHUTDOWN)
833 atm_warn(usbatm, "poll status: error %d\n", ret);
834
835 mutex_lock(&instance->poll_state_serialize);
836 if (instance->poll_state != CXPOLL_SHUTDOWN) {
837 instance->poll_state = CXPOLL_STOPPED;
838
839 if (ret != -ESHUTDOWN)
840 atm_warn(usbatm, "polling disabled, set adsl_state"
841 " to 'start' or 'poll' to resume\n");
842 }
843 mutex_unlock(&instance->poll_state_serialize);
844 goto reschedule;
845 }
846
847 memcpy(instance->card_info, buf, sizeof(instance->card_info));
848
849 if (instance->adsl_status != buf[CXINF_LINE_STARTABLE]) {
850 instance->adsl_status = buf[CXINF_LINE_STARTABLE];
851
852 switch (instance->adsl_status) {
853 case 0:
854 atm_info(usbatm, "ADSL state: running\n");
855 break;
856
857 case 1:
858 atm_info(usbatm, "ADSL state: stopped\n");
859 break;
860
861 default:
862 atm_info(usbatm, "Unknown adsl status %02x\n", instance->adsl_status);
863 break;
864 }
865 }
866
867 if (instance->line_status == buf[CXINF_LINE_STATUS])
868 goto reschedule;
869
870 instance->line_status = buf[CXINF_LINE_STATUS];
871 switch (instance->line_status) {
872 case 0:
873 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
874 atm_info(usbatm, "ADSL line: down\n");
875 break;
876
877 case 1:
878 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
879 atm_info(usbatm, "ADSL line: attempting to activate\n");
880 break;
881
882 case 2:
883 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
884 atm_info(usbatm, "ADSL line: training\n");
885 break;
886
887 case 3:
888 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
889 atm_info(usbatm, "ADSL line: channel analysis\n");
890 break;
891
892 case 4:
893 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
894 atm_info(usbatm, "ADSL line: exchange\n");
895 break;
896
897 case 5:
898 atm_dev->link_rate = buf[CXINF_DOWNSTREAM_RATE] * 1000 / 424;
899 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_FOUND);
900
901 atm_info(usbatm, "ADSL line: up (%d kb/s down | %d kb/s up)\n",
902 buf[CXINF_DOWNSTREAM_RATE], buf[CXINF_UPSTREAM_RATE]);
903 break;
904
905 case 6:
906 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
907 atm_info(usbatm, "ADSL line: waiting\n");
908 break;
909
910 case 7:
911 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
912 atm_info(usbatm, "ADSL line: initializing\n");
913 break;
914
915 default:
916 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_UNKNOWN);
917 atm_info(usbatm, "Unknown line state %02x\n", instance->line_status);
918 break;
919 }
920 reschedule:
921
922 mutex_lock(&instance->poll_state_serialize);
923 if (instance->poll_state == CXPOLL_STOPPING &&
924 instance->adsl_status == 1 && /* stopped */
925 instance->line_status == 0) /* down */
926 instance->poll_state = CXPOLL_STOPPED;
927
928 if (instance->poll_state == CXPOLL_STOPPED)
929 keep_polling = 0;
930 mutex_unlock(&instance->poll_state_serialize);
931
932 if (keep_polling)
933 schedule_delayed_work(&instance->poll_work,
934 round_jiffies_relative(POLL_INTERVAL*HZ));
935 }
936
cxacru_fw(struct usb_device * usb_dev,enum cxacru_fw_request fw,u8 code1,u8 code2,u32 addr,const u8 * data,int size)937 static int cxacru_fw(struct usb_device *usb_dev, enum cxacru_fw_request fw,
938 u8 code1, u8 code2, u32 addr, const u8 *data, int size)
939 {
940 int ret;
941 u8 *buf;
942 int offd, offb;
943 const int stride = CMD_PACKET_SIZE - 8;
944
945 buf = (u8 *) __get_free_page(GFP_KERNEL);
946 if (!buf)
947 return -ENOMEM;
948
949 offb = offd = 0;
950 do {
951 int l = min_t(int, stride, size - offd);
952
953 buf[offb++] = fw;
954 buf[offb++] = l;
955 buf[offb++] = code1;
956 buf[offb++] = code2;
957 put_unaligned(cpu_to_le32(addr), (__le32 *)(buf + offb));
958 offb += 4;
959 addr += l;
960 if (l)
961 memcpy(buf + offb, data + offd, l);
962 if (l < stride)
963 memset(buf + offb + l, 0, stride - l);
964 offb += stride;
965 offd += stride;
966 if ((offb >= PAGE_SIZE) || (offd >= size)) {
967 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
968 buf, offb, NULL, CMD_TIMEOUT);
969 if (ret < 0) {
970 dev_dbg(&usb_dev->dev, "sending fw %#x failed\n", fw);
971 goto cleanup;
972 }
973 offb = 0;
974 }
975 } while (offd < size);
976 dev_dbg(&usb_dev->dev, "sent fw %#x\n", fw);
977
978 ret = 0;
979
980 cleanup:
981 free_page((unsigned long) buf);
982 return ret;
983 }
984
985
cxacru_find_firmware(struct cxacru_data * instance,char * phase,const struct firmware ** fw_p)986 static int cxacru_find_firmware(struct cxacru_data *instance,
987 char *phase, const struct firmware **fw_p)
988 {
989 struct usbatm_data *usbatm = instance->usbatm;
990 struct device *dev = &usbatm->usb_intf->dev;
991 char buf[16];
992
993 sprintf(buf, "cxacru-%s.bin", phase);
994 usb_dbg(usbatm, "cxacru_find_firmware: looking for %s\n", buf);
995
996 if (request_firmware(fw_p, buf, dev)) {
997 usb_dbg(usbatm, "no stage %s firmware found\n", phase);
998 return -ENOENT;
999 }
1000
1001 usb_info(usbatm, "found firmware %s\n", buf);
1002
1003 return 0;
1004 }
1005
cxacru_heavy_init(struct usbatm_data * usbatm_instance,struct usb_interface * usb_intf)1006 static int cxacru_heavy_init(struct usbatm_data *usbatm_instance,
1007 struct usb_interface *usb_intf)
1008 {
1009 const struct firmware *fw, *bp;
1010 struct cxacru_data *instance = usbatm_instance->driver_data;
1011 struct usbatm_data *usbatm = instance->usbatm;
1012 struct usb_device *usb_dev = usbatm->usb_dev;
1013 __le16 signature[] = { usb_dev->descriptor.idVendor,
1014 usb_dev->descriptor.idProduct };
1015 __le32 val;
1016 int ret;
1017
1018 ret = cxacru_find_firmware(instance, "fw", &fw);
1019 if (ret) {
1020 usb_warn(usbatm_instance, "firmware (cxacru-fw.bin) unavailable (system misconfigured?)\n");
1021 return ret;
1022 }
1023
1024 if (instance->modem_type->boot_rom_patch) {
1025 ret = cxacru_find_firmware(instance, "bp", &bp);
1026 if (ret) {
1027 usb_warn(usbatm_instance, "boot ROM patch (cxacru-bp.bin) unavailable (system misconfigured?)\n");
1028 release_firmware(fw);
1029 return ret;
1030 }
1031 }
1032
1033 /* FirmwarePllFClkValue */
1034 val = cpu_to_le32(instance->modem_type->pll_f_clk);
1035 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLFCLK_ADDR, (u8 *) &val, 4);
1036 if (ret) {
1037 usb_err(usbatm, "FirmwarePllFClkValue failed: %d\n", ret);
1038 goto done;
1039 }
1040
1041 /* FirmwarePllBClkValue */
1042 val = cpu_to_le32(instance->modem_type->pll_b_clk);
1043 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLBCLK_ADDR, (u8 *) &val, 4);
1044 if (ret) {
1045 usb_err(usbatm, "FirmwarePllBClkValue failed: %d\n", ret);
1046 goto done;
1047 }
1048
1049 /* Enable SDRAM */
1050 val = cpu_to_le32(SDRAM_ENA);
1051 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SDRAMEN_ADDR, (u8 *) &val, 4);
1052 if (ret) {
1053 usb_err(usbatm, "Enable SDRAM failed: %d\n", ret);
1054 goto done;
1055 }
1056
1057 /* Firmware */
1058 usb_info(usbatm, "loading firmware\n");
1059 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, FW_ADDR, fw->data, fw->size);
1060 if (ret) {
1061 usb_err(usbatm, "Firmware upload failed: %d\n", ret);
1062 goto done;
1063 }
1064
1065 /* Boot ROM patch */
1066 if (instance->modem_type->boot_rom_patch) {
1067 usb_info(usbatm, "loading boot ROM patch\n");
1068 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_ADDR, bp->data, bp->size);
1069 if (ret) {
1070 usb_err(usbatm, "Boot ROM patching failed: %d\n", ret);
1071 goto done;
1072 }
1073 }
1074
1075 /* Signature */
1076 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SIG_ADDR, (u8 *) signature, 4);
1077 if (ret) {
1078 usb_err(usbatm, "Signature storing failed: %d\n", ret);
1079 goto done;
1080 }
1081
1082 usb_info(usbatm, "starting device\n");
1083 if (instance->modem_type->boot_rom_patch) {
1084 val = cpu_to_le32(BR_ADDR);
1085 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_STACK_ADDR, (u8 *) &val, 4);
1086 } else {
1087 ret = cxacru_fw(usb_dev, FW_GOTO_MEM, 0x0, 0x0, FW_ADDR, NULL, 0);
1088 }
1089 if (ret) {
1090 usb_err(usbatm, "Passing control to firmware failed: %d\n", ret);
1091 goto done;
1092 }
1093
1094 /* Delay to allow firmware to start up. */
1095 msleep_interruptible(1000);
1096
1097 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD));
1098 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD));
1099 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_DATA));
1100 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_DATA));
1101
1102 ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
1103 if (ret < 0) {
1104 usb_err(usbatm, "modem failed to initialize: %d\n", ret);
1105 goto done;
1106 }
1107
1108 done:
1109 if (instance->modem_type->boot_rom_patch)
1110 release_firmware(bp);
1111 release_firmware(fw);
1112
1113 ret = cxacru_card_status(instance);
1114 if (ret)
1115 usb_dbg(usbatm_instance, "modem initialisation failed\n");
1116 else
1117 usb_dbg(usbatm_instance, "done setting up the modem\n");
1118
1119 return ret;
1120 }
1121
cxacru_bind(struct usbatm_data * usbatm_instance,struct usb_interface * intf,const struct usb_device_id * id)1122 static int cxacru_bind(struct usbatm_data *usbatm_instance,
1123 struct usb_interface *intf, const struct usb_device_id *id)
1124 {
1125 struct cxacru_data *instance;
1126 struct usb_device *usb_dev = interface_to_usbdev(intf);
1127 struct usb_host_endpoint *cmd_ep = usb_dev->ep_in[CXACRU_EP_CMD];
1128 static const u8 ep_addrs[] = {
1129 CXACRU_EP_CMD + USB_DIR_IN,
1130 CXACRU_EP_CMD + USB_DIR_OUT,
1131 0};
1132 int ret;
1133
1134 /* instance init */
1135 instance = kzalloc_obj(*instance);
1136 if (!instance)
1137 return -ENOMEM;
1138
1139 instance->usbatm = usbatm_instance;
1140 instance->modem_type = (struct cxacru_modem_type *) id->driver_info;
1141
1142 mutex_init(&instance->poll_state_serialize);
1143 instance->poll_state = CXPOLL_STOPPED;
1144 instance->line_status = -1;
1145 instance->adsl_status = -1;
1146
1147 mutex_init(&instance->adsl_state_serialize);
1148
1149 instance->rcv_buf = (u8 *) __get_free_page(GFP_KERNEL);
1150 if (!instance->rcv_buf) {
1151 usb_dbg(usbatm_instance, "cxacru_bind: no memory for rcv_buf\n");
1152 ret = -ENOMEM;
1153 goto fail;
1154 }
1155 instance->snd_buf = (u8 *) __get_free_page(GFP_KERNEL);
1156 if (!instance->snd_buf) {
1157 usb_dbg(usbatm_instance, "cxacru_bind: no memory for snd_buf\n");
1158 ret = -ENOMEM;
1159 goto fail;
1160 }
1161 instance->rcv_urb = usb_alloc_urb(0, GFP_KERNEL);
1162 if (!instance->rcv_urb) {
1163 ret = -ENOMEM;
1164 goto fail;
1165 }
1166 instance->snd_urb = usb_alloc_urb(0, GFP_KERNEL);
1167 if (!instance->snd_urb) {
1168 ret = -ENOMEM;
1169 goto fail;
1170 }
1171
1172 if (!cmd_ep) {
1173 usb_dbg(usbatm_instance, "cxacru_bind: no command endpoint\n");
1174 ret = -ENODEV;
1175 goto fail;
1176 }
1177
1178 if (usb_endpoint_xfer_int(&cmd_ep->desc))
1179 ret = usb_check_int_endpoints(intf, ep_addrs);
1180 else
1181 ret = usb_check_bulk_endpoints(intf, ep_addrs);
1182
1183 if (!ret) {
1184 usb_err(usbatm_instance, "cxacru_bind: interface has incorrect endpoints\n");
1185 ret = -ENODEV;
1186 goto fail;
1187 }
1188
1189 if ((cmd_ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1190 == USB_ENDPOINT_XFER_INT) {
1191 usb_fill_int_urb(instance->rcv_urb,
1192 usb_dev, usb_rcvintpipe(usb_dev, CXACRU_EP_CMD),
1193 instance->rcv_buf, PAGE_SIZE,
1194 cxacru_blocking_completion, &instance->rcv_done, 1);
1195
1196 usb_fill_int_urb(instance->snd_urb,
1197 usb_dev, usb_sndintpipe(usb_dev, CXACRU_EP_CMD),
1198 instance->snd_buf, PAGE_SIZE,
1199 cxacru_blocking_completion, &instance->snd_done, 4);
1200 } else {
1201 usb_fill_bulk_urb(instance->rcv_urb,
1202 usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD),
1203 instance->rcv_buf, PAGE_SIZE,
1204 cxacru_blocking_completion, &instance->rcv_done);
1205
1206 usb_fill_bulk_urb(instance->snd_urb,
1207 usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
1208 instance->snd_buf, PAGE_SIZE,
1209 cxacru_blocking_completion, &instance->snd_done);
1210 }
1211
1212 mutex_init(&instance->cm_serialize);
1213
1214 INIT_DELAYED_WORK(&instance->poll_work, cxacru_poll_status);
1215
1216 usbatm_instance->driver_data = instance;
1217
1218 usbatm_instance->flags = (cxacru_card_status(instance) ? 0 : UDSL_SKIP_HEAVY_INIT);
1219
1220 return 0;
1221
1222 fail:
1223 free_page((unsigned long) instance->snd_buf);
1224 free_page((unsigned long) instance->rcv_buf);
1225 usb_free_urb(instance->snd_urb);
1226 usb_free_urb(instance->rcv_urb);
1227 kfree(instance);
1228
1229 return ret;
1230 }
1231
cxacru_unbind(struct usbatm_data * usbatm_instance,struct usb_interface * intf)1232 static void cxacru_unbind(struct usbatm_data *usbatm_instance,
1233 struct usb_interface *intf)
1234 {
1235 struct cxacru_data *instance = usbatm_instance->driver_data;
1236 usb_dbg(usbatm_instance, "cxacru_unbind entered\n");
1237
1238 if (!instance) {
1239 usb_dbg(usbatm_instance, "cxacru_unbind: NULL instance!\n");
1240 return;
1241 }
1242
1243 mutex_lock(&instance->poll_state_serialize);
1244 BUG_ON(instance->poll_state == CXPOLL_SHUTDOWN);
1245
1246 /* stop polling from being stopped or started */
1247 instance->poll_state = CXPOLL_SHUTDOWN;
1248 mutex_unlock(&instance->poll_state_serialize);
1249
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
1265 static const struct cxacru_modem_type cxacru_cafe = {
1266 .pll_f_clk = 0x02d874df,
1267 .pll_b_clk = 0x0196a51a,
1268 .boot_rom_patch = 1,
1269 };
1270
1271 static const struct cxacru_modem_type cxacru_cb00 = {
1272 .pll_f_clk = 0x5,
1273 .pll_b_clk = 0x3,
1274 .boot_rom_patch = 0,
1275 };
1276
1277 static 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
1332 MODULE_DEVICE_TABLE(usb, cxacru_usb_ids);
1333
1334 static 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 .bulk_in = CXACRU_EP_DATA,
1341 .bulk_out = CXACRU_EP_DATA,
1342 .rx_padding = 3,
1343 .tx_padding = 11,
1344 };
1345
cxacru_usb_probe(struct usb_interface * intf,const struct usb_device_id * id)1346 static int cxacru_usb_probe(struct usb_interface *intf,
1347 const struct usb_device_id *id)
1348 {
1349 struct usb_device *usb_dev = interface_to_usbdev(intf);
1350 char buf[15];
1351
1352 /* Avoid ADSL routers (cx82310_eth).
1353 * Abort if bDeviceClass is 0xff and iProduct is "USB NET CARD".
1354 */
1355 if (usb_dev->descriptor.bDeviceClass == USB_CLASS_VENDOR_SPEC
1356 && usb_string(usb_dev, usb_dev->descriptor.iProduct,
1357 buf, sizeof(buf)) > 0) {
1358 if (!strcmp(buf, "USB NET CARD")) {
1359 dev_info(&intf->dev, "ignoring cx82310_eth device\n");
1360 return -ENODEV;
1361 }
1362 }
1363
1364 return usbatm_usb_probe(intf, id, &cxacru_driver);
1365 }
1366
1367 static struct usb_driver cxacru_usb_driver = {
1368 .name = cxacru_driver_name,
1369 .probe = cxacru_usb_probe,
1370 .disconnect = usbatm_usb_disconnect,
1371 .id_table = cxacru_usb_ids,
1372 .dev_groups = cxacru_groups,
1373 };
1374
1375 module_usb_driver(cxacru_usb_driver);
1376
1377 MODULE_AUTHOR(DRIVER_AUTHOR);
1378 MODULE_DESCRIPTION(DRIVER_DESC);
1379 MODULE_LICENSE("GPL");
1380