Version:  2.0.40 2.2.26 2.4.37 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4

Linux/drivers/usb/atm/cxacru.c

  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 
 49 static 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  */
 74 enum 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  */
 86 enum 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  */
124 enum cxacru_cm_flash {
125         CM_FLASH_READ = 0xa1,
126         CM_FLASH_WRITE = 0xa2
127 };
128 
129 /* reply codes to the commands above */
130 enum 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 */
142 enum 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 
172 enum cxacru_poll_state {
173         CXPOLL_STOPPING,
174         CXPOLL_STOPPED,
175         CXPOLL_POLLING,
176         CXPOLL_SHUTDOWN
177 };
178 
179 struct cxacru_modem_type {
180         u32 pll_f_clk;
181         u32 pll_b_clk;
182         int boot_rom_patch;
183 };
184 
185 struct 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 
208 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
209         u8 *wdata, int wsize, u8 *rdata, int rsize);
210 static void cxacru_poll_status(struct work_struct *work);
211 
212 /* Card info exported through sysfs */
213 #define CXACRU__ATTR_INIT(_name) \
214 static DEVICE_ATTR(_name, S_IRUGO, cxacru_sysfs_show_##_name, NULL)
215 
216 #define CXACRU_CMD_INIT(_name) \
217 static DEVICE_ATTR(_name, S_IWUSR | S_IRUGO, \
218         cxacru_sysfs_show_##_name, cxacru_sysfs_store_##_name)
219 
220 #define CXACRU_SET_INIT(_name) \
221 static DEVICE_ATTR(_name, S_IWUSR, \
222         NULL, cxacru_sysfs_store_##_name)
223 
224 #define CXACRU_ATTR_INIT(_value, _type, _name) \
225 static 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 } \
236 CXACRU__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 
248 static ssize_t cxacru_sysfs_showattr_u32(u32 value, char *buf)
249 {
250         return snprintf(buf, PAGE_SIZE, "%u\n", value);
251 }
252 
253 static ssize_t cxacru_sysfs_showattr_s8(s8 value, char *buf)
254 {
255         return snprintf(buf, PAGE_SIZE, "%d\n", value);
256 }
257 
258 static 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 
270 static ssize_t cxacru_sysfs_showattr_bool(u32 value, char *buf)
271 {
272         static char *str[] = { "no", "yes" };
273 
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 
279 static ssize_t cxacru_sysfs_showattr_LINK(u32 value, char *buf)
280 {
281         static char *str[] = { NULL, "not connected", "connected", "lost" };
282 
283         if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL))
284                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
285         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
286 }
287 
288 static ssize_t cxacru_sysfs_showattr_LINE(u32 value, char *buf)
289 {
290         static char *str[] = { "down", "attempting to activate",
291                 "training", "channel analysis", "exchange", "up",
292                 "waiting", "initialising"
293         };
294         if (unlikely(value >= ARRAY_SIZE(str)))
295                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
296         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
297 }
298 
299 static ssize_t cxacru_sysfs_showattr_MODU(u32 value, char *buf)
300 {
301         static char *str[] = {
302                         "",
303                         "ANSI T1.413",
304                         "ITU-T G.992.1 (G.DMT)",
305                         "ITU-T G.992.2 (G.LITE)"
306         };
307         if (unlikely(value >= ARRAY_SIZE(str)))
308                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
309         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
310 }
311 
312 /*
313  * This could use MAC_ADDRESS_HIGH and MAC_ADDRESS_LOW, but since
314  * this data is already in atm_dev there's no point.
315  *
316  * MAC_ADDRESS_HIGH = 0x????5544
317  * MAC_ADDRESS_LOW  = 0x33221100
318  * Where 00-55 are bytes 0-5 of the MAC.
319  */
320 static ssize_t cxacru_sysfs_show_mac_address(struct device *dev,
321         struct device_attribute *attr, char *buf)
322 {
323         struct cxacru_data *instance = to_usbatm_driver_data(
324                         to_usb_interface(dev));
325 
326         if (instance == NULL || instance->usbatm->atm_dev == NULL)
327                 return -ENODEV;
328 
329         return snprintf(buf, PAGE_SIZE, "%pM\n",
330                 instance->usbatm->atm_dev->esi);
331 }
332 
333 static ssize_t cxacru_sysfs_show_adsl_state(struct device *dev,
334         struct device_attribute *attr, char *buf)
335 {
336         static char *str[] = { "running", "stopped" };
337         struct cxacru_data *instance = to_usbatm_driver_data(
338                         to_usb_interface(dev));
339         u32 value;
340 
341         if (instance == NULL)
342                 return -ENODEV;
343 
344         value = instance->card_info[CXINF_LINE_STARTABLE];
345         if (unlikely(value >= ARRAY_SIZE(str)))
346                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
347         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
348 }
349 
350 static ssize_t cxacru_sysfs_store_adsl_state(struct device *dev,
351         struct device_attribute *attr, const char *buf, size_t count)
352 {
353         struct cxacru_data *instance = to_usbatm_driver_data(
354                         to_usb_interface(dev));
355         int ret;
356         int poll = -1;
357         char str_cmd[8];
358         int len = strlen(buf);
359 
360         if (!capable(CAP_NET_ADMIN))
361                 return -EACCES;
362 
363         ret = sscanf(buf, "%7s", str_cmd);
364         if (ret != 1)
365                 return -EINVAL;
366         ret = 0;
367 
368         if (instance == NULL)
369                 return -ENODEV;
370 
371         if (mutex_lock_interruptible(&instance->adsl_state_serialize))
372                 return -ERESTARTSYS;
373 
374         if (!strcmp(str_cmd, "stop") || !strcmp(str_cmd, "restart")) {
375                 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_STOP, NULL, 0, NULL, 0);
376                 if (ret < 0) {
377                         atm_err(instance->usbatm, "change adsl state:"
378                                 " CHIP_ADSL_LINE_STOP returned %d\n", ret);
379 
380                         ret = -EIO;
381                 } else {
382                         ret = len;
383                         poll = CXPOLL_STOPPED;
384                 }
385         }
386 
387         /* Line status is only updated every second
388          * and the device appears to only react to
389          * START/STOP every second too. Wait 1.5s to
390          * be sure that restart will have an effect. */
391         if (!strcmp(str_cmd, "restart"))
392                 msleep(1500);
393 
394         if (!strcmp(str_cmd, "start") || !strcmp(str_cmd, "restart")) {
395                 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
396                 if (ret < 0) {
397                         atm_err(instance->usbatm, "change adsl state:"
398                                 " CHIP_ADSL_LINE_START returned %d\n", ret);
399 
400                         ret = -EIO;
401                 } else {
402                         ret = len;
403                         poll = CXPOLL_POLLING;
404                 }
405         }
406 
407         if (!strcmp(str_cmd, "poll")) {
408                 ret = len;
409                 poll = CXPOLL_POLLING;
410         }
411 
412         if (ret == 0) {
413                 ret = -EINVAL;
414                 poll = -1;
415         }
416 
417         if (poll == CXPOLL_POLLING) {
418                 mutex_lock(&instance->poll_state_serialize);
419                 switch (instance->poll_state) {
420                 case CXPOLL_STOPPED:
421                         /* start polling */
422                         instance->poll_state = CXPOLL_POLLING;
423                         break;
424 
425                 case CXPOLL_STOPPING:
426                         /* abort stop request */
427                         instance->poll_state = CXPOLL_POLLING;
428                 case CXPOLL_POLLING:
429                 case CXPOLL_SHUTDOWN:
430                         /* don't start polling */
431                         poll = -1;
432                 }
433                 mutex_unlock(&instance->poll_state_serialize);
434         } else if (poll == CXPOLL_STOPPED) {
435                 mutex_lock(&instance->poll_state_serialize);
436                 /* request stop */
437                 if (instance->poll_state == CXPOLL_POLLING)
438                         instance->poll_state = CXPOLL_STOPPING;
439                 mutex_unlock(&instance->poll_state_serialize);
440         }
441 
442         mutex_unlock(&instance->adsl_state_serialize);
443 
444         if (poll == CXPOLL_POLLING)
445                 cxacru_poll_status(&instance->poll_work.work);
446 
447         return ret;
448 }
449 
450 /* CM_REQUEST_CARD_DATA_GET times out, so no show attribute */
451 
452 static ssize_t cxacru_sysfs_store_adsl_config(struct device *dev,
453         struct device_attribute *attr, const char *buf, size_t count)
454 {
455         struct cxacru_data *instance = to_usbatm_driver_data(
456                         to_usb_interface(dev));
457         int len = strlen(buf);
458         int ret, pos, num;
459         __le32 data[CMD_PACKET_SIZE / 4];
460 
461         if (!capable(CAP_NET_ADMIN))
462                 return -EACCES;
463 
464         if (instance == NULL)
465                 return -ENODEV;
466 
467         pos = 0;
468         num = 0;
469         while (pos < len) {
470                 int tmp;
471                 u32 index;
472                 u32 value;
473 
474                 ret = sscanf(buf + pos, "%x=%x%n", &index, &value, &tmp);
475                 if (ret < 2)
476                         return -EINVAL;
477                 if (index < 0 || index > 0x7f)
478                         return -EINVAL;
479                 pos += tmp;
480 
481                 /* skip trailing newline */
482                 if (buf[pos] == '\n' && pos == len-1)
483                         pos++;
484 
485                 data[num * 2 + 1] = cpu_to_le32(index);
486                 data[num * 2 + 2] = cpu_to_le32(value);
487                 num++;
488 
489                 /* send config values when data buffer is full
490                  * or no more data
491                  */
492                 if (pos >= len || num >= CMD_MAX_CONFIG) {
493                         char log[CMD_MAX_CONFIG * 12 + 1]; /* %02x=%08x */
494 
495                         data[0] = cpu_to_le32(num);
496                         ret = cxacru_cm(instance, CM_REQUEST_CARD_DATA_SET,
497                                 (u8 *) data, 4 + num * 8, NULL, 0);
498                         if (ret < 0) {
499                                 atm_err(instance->usbatm,
500                                         "set card data returned %d\n", ret);
501                                 return -EIO;
502                         }
503 
504                         for (tmp = 0; tmp < num; tmp++)
505                                 snprintf(log + tmp*12, 13, " %02x=%08x",
506                                         le32_to_cpu(data[tmp * 2 + 1]),
507                                         le32_to_cpu(data[tmp * 2 + 2]));
508                         atm_info(instance->usbatm, "config%s\n", log);
509                         num = 0;
510                 }
511         }
512 
513         return len;
514 }
515 
516 /*
517  * All device attributes are included in CXACRU_ALL_FILES
518  * so that the same list can be used multiple times:
519  *     INIT   (define the device attributes)
520  *     CREATE (create all the device files)
521  *     REMOVE (remove all the device files)
522  *
523  * With the last two being defined as needed in the functions
524  * they are used in before calling CXACRU_ALL_FILES()
525  */
526 #define CXACRU_ALL_FILES(_action) \
527 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_RATE,           u32,  downstream_rate); \
528 CXACRU_ATTR_##_action(CXINF_UPSTREAM_RATE,             u32,  upstream_rate); \
529 CXACRU_ATTR_##_action(CXINF_LINK_STATUS,               LINK, link_status); \
530 CXACRU_ATTR_##_action(CXINF_LINE_STATUS,               LINE, line_status); \
531 CXACRU__ATTR_##_action(                                      mac_address); \
532 CXACRU_ATTR_##_action(CXINF_UPSTREAM_SNR_MARGIN,       dB,   upstream_snr_margin); \
533 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_SNR_MARGIN,     dB,   downstream_snr_margin); \
534 CXACRU_ATTR_##_action(CXINF_UPSTREAM_ATTENUATION,      dB,   upstream_attenuation); \
535 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_ATTENUATION,    dB,   downstream_attenuation); \
536 CXACRU_ATTR_##_action(CXINF_TRANSMITTER_POWER,         s8,   transmitter_power); \
537 CXACRU_ATTR_##_action(CXINF_UPSTREAM_BITS_PER_FRAME,   u32,  upstream_bits_per_frame); \
538 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_BITS_PER_FRAME, u32,  downstream_bits_per_frame); \
539 CXACRU_ATTR_##_action(CXINF_STARTUP_ATTEMPTS,          u32,  startup_attempts); \
540 CXACRU_ATTR_##_action(CXINF_UPSTREAM_CRC_ERRORS,       u32,  upstream_crc_errors); \
541 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_CRC_ERRORS,     u32,  downstream_crc_errors); \
542 CXACRU_ATTR_##_action(CXINF_UPSTREAM_FEC_ERRORS,       u32,  upstream_fec_errors); \
543 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_FEC_ERRORS,     u32,  downstream_fec_errors); \
544 CXACRU_ATTR_##_action(CXINF_UPSTREAM_HEC_ERRORS,       u32,  upstream_hec_errors); \
545 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_HEC_ERRORS,     u32,  downstream_hec_errors); \
546 CXACRU_ATTR_##_action(CXINF_LINE_STARTABLE,            bool, line_startable); \
547 CXACRU_ATTR_##_action(CXINF_MODULATION,                MODU, modulation); \
548 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND,              u32,  adsl_headend); \
549 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND_ENVIRONMENT,  u32,  adsl_headend_environment); \
550 CXACRU_ATTR_##_action(CXINF_CONTROLLER_VERSION,        u32,  adsl_controller_version); \
551 CXACRU_CMD_##_action(                                        adsl_state); \
552 CXACRU_SET_##_action(                                        adsl_config);
553 
554 CXACRU_ALL_FILES(INIT);
555 
556 /* the following three functions are stolen from drivers/usb/core/message.c */
557 static void cxacru_blocking_completion(struct urb *urb)
558 {
559         complete(urb->context);
560 }
561 
562 static void cxacru_timeout_kill(unsigned long data)
563 {
564         usb_unlink_urb((struct urb *) data);
565 }
566 
567 static int cxacru_start_wait_urb(struct urb *urb, struct completion *done,
568                                  int *actual_length)
569 {
570         struct timer_list timer;
571 
572         init_timer(&timer);
573         timer.expires = jiffies + msecs_to_jiffies(CMD_TIMEOUT);
574         timer.data = (unsigned long) urb;
575         timer.function = cxacru_timeout_kill;
576         add_timer(&timer);
577         wait_for_completion(done);
578         del_timer_sync(&timer);
579 
580         if (actual_length)
581                 *actual_length = urb->actual_length;
582         return urb->status; /* must read status after completion */
583 }
584 
585 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
586                      u8 *wdata, int wsize, u8 *rdata, int rsize)
587 {
588         int ret, actlen;
589         int offb, offd;
590         const int stride = CMD_PACKET_SIZE - 4;
591         u8 *wbuf = instance->snd_buf;
592         u8 *rbuf = instance->rcv_buf;
593         int wbuflen = ((wsize - 1) / stride + 1) * CMD_PACKET_SIZE;
594         int rbuflen = ((rsize - 1) / stride + 1) * CMD_PACKET_SIZE;
595 
596         if (wbuflen > PAGE_SIZE || rbuflen > PAGE_SIZE) {
597                 if (printk_ratelimit())
598                         usb_err(instance->usbatm, "requested transfer size too large (%d, %d)\n",
599                                 wbuflen, rbuflen);
600                 ret = -ENOMEM;
601                 goto err;
602         }
603 
604         mutex_lock(&instance->cm_serialize);
605 
606         /* submit reading urb before the writing one */
607         init_completion(&instance->rcv_done);
608         ret = usb_submit_urb(instance->rcv_urb, GFP_KERNEL);
609         if (ret < 0) {
610                 if (printk_ratelimit())
611                         usb_err(instance->usbatm, "submit of read urb for cm %#x failed (%d)\n",
612                                 cm, ret);
613                 goto fail;
614         }
615 
616         memset(wbuf, 0, wbuflen);
617         /* handle wsize == 0 */
618         wbuf[0] = cm;
619         for (offb = offd = 0; offd < wsize; offd += stride, offb += CMD_PACKET_SIZE) {
620                 wbuf[offb] = cm;
621                 memcpy(wbuf + offb + 4, wdata + offd, min_t(int, stride, wsize - offd));
622         }
623 
624         instance->snd_urb->transfer_buffer_length = wbuflen;
625         init_completion(&instance->snd_done);
626         ret = usb_submit_urb(instance->snd_urb, GFP_KERNEL);
627         if (ret < 0) {
628                 if (printk_ratelimit())
629                         usb_err(instance->usbatm, "submit of write urb for cm %#x failed (%d)\n",
630                                 cm, ret);
631                 goto fail;
632         }
633 
634         ret = cxacru_start_wait_urb(instance->snd_urb, &instance->snd_done, NULL);
635         if (ret < 0) {
636                 if (printk_ratelimit())
637                         usb_err(instance->usbatm, "send of cm %#x failed (%d)\n", cm, ret);
638                 goto fail;
639         }
640 
641         ret = cxacru_start_wait_urb(instance->rcv_urb, &instance->rcv_done, &actlen);
642         if (ret < 0) {
643                 if (printk_ratelimit())
644                         usb_err(instance->usbatm, "receive of cm %#x failed (%d)\n", cm, ret);
645                 goto fail;
646         }
647         if (actlen % CMD_PACKET_SIZE || !actlen) {
648                 if (printk_ratelimit())
649                         usb_err(instance->usbatm, "invalid response length to cm %#x: %d\n",
650                                 cm, actlen);
651                 ret = -EIO;
652                 goto fail;
653         }
654 
655         /* check the return status and copy the data to the output buffer, if needed */
656         for (offb = offd = 0; offd < rsize && offb < actlen; offb += CMD_PACKET_SIZE) {
657                 if (rbuf[offb] != cm) {
658                         if (printk_ratelimit())
659                                 usb_err(instance->usbatm, "wrong cm %#x in response to cm %#x\n",
660                                         rbuf[offb], cm);
661                         ret = -EIO;
662                         goto fail;
663                 }
664                 if (rbuf[offb + 1] != CM_STATUS_SUCCESS) {
665                         if (printk_ratelimit())
666                                 usb_err(instance->usbatm, "response to cm %#x failed: %#x\n",
667                                         cm, rbuf[offb + 1]);
668                         ret = -EIO;
669                         goto fail;
670                 }
671                 if (offd >= rsize)
672                         break;
673                 memcpy(rdata + offd, rbuf + offb + 4, min_t(int, stride, rsize - offd));
674                 offd += stride;
675         }
676 
677         ret = offd;
678         usb_dbg(instance->usbatm, "cm %#x\n", cm);
679 fail:
680         mutex_unlock(&instance->cm_serialize);
681 err:
682         return ret;
683 }
684 
685 static int cxacru_cm_get_array(struct cxacru_data *instance, enum cxacru_cm_request cm,
686                                u32 *data, int size)
687 {
688         int ret, len;
689         __le32 *buf;
690         int offb;
691         unsigned int offd;
692         const int stride = CMD_PACKET_SIZE / (4 * 2) - 1;
693         int buflen =  ((size - 1) / stride + 1 + size * 2) * 4;
694 
695         buf = kmalloc(buflen, GFP_KERNEL);
696         if (!buf)
697                 return -ENOMEM;
698 
699         ret = cxacru_cm(instance, cm, NULL, 0, (u8 *) buf, buflen);
700         if (ret < 0)
701                 goto cleanup;
702 
703         /* len > 0 && len % 4 == 0 guaranteed by cxacru_cm() */
704         len = ret / 4;
705         for (offb = 0; offb < len; ) {
706                 int l = le32_to_cpu(buf[offb++]);
707 
708                 if (l < 0 || l > stride || l > (len - offb) / 2) {
709                         if (printk_ratelimit())
710                                 usb_err(instance->usbatm, "invalid data length from cm %#x: %d\n",
711                                         cm, l);
712                         ret = -EIO;
713                         goto cleanup;
714                 }
715                 while (l--) {
716                         offd = le32_to_cpu(buf[offb++]);
717                         if (offd >= size) {
718                                 if (printk_ratelimit())
719                                         usb_err(instance->usbatm, "wrong index %#x in response to cm %#x\n",
720                                                 offd, cm);
721                                 ret = -EIO;
722                                 goto cleanup;
723                         }
724                         data[offd] = le32_to_cpu(buf[offb++]);
725                 }
726         }
727 
728         ret = 0;
729 
730 cleanup:
731         kfree(buf);
732         return ret;
733 }
734 
735 static int cxacru_card_status(struct cxacru_data *instance)
736 {
737         int ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
738 
739         if (ret < 0) {          /* firmware not loaded */
740                 usb_dbg(instance->usbatm, "cxacru_adsl_start: CARD_GET_STATUS returned %d\n", ret);
741                 return ret;
742         }
743         return 0;
744 }
745 
746 static void cxacru_remove_device_files(struct usbatm_data *usbatm_instance,
747                 struct atm_dev *atm_dev)
748 {
749         struct usb_interface *intf = usbatm_instance->usb_intf;
750 
751         #define CXACRU_DEVICE_REMOVE_FILE(_name) \
752                 device_remove_file(&intf->dev, &dev_attr_##_name);
753         CXACRU_ALL_FILES(REMOVE);
754         #undef CXACRU_DEVICE_REMOVE_FILE
755 }
756 
757 static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
758                 struct atm_dev *atm_dev)
759 {
760         struct cxacru_data *instance = usbatm_instance->driver_data;
761         struct usb_interface *intf = usbatm_instance->usb_intf;
762         int ret;
763         int start_polling = 1;
764 
765         dev_dbg(&intf->dev, "%s\n", __func__);
766 
767         /* Read MAC address */
768         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_MAC_ADDRESS, NULL, 0,
769                         atm_dev->esi, sizeof(atm_dev->esi));
770         if (ret < 0) {
771                 atm_err(usbatm_instance, "cxacru_atm_start: CARD_GET_MAC_ADDRESS returned %d\n", ret);
772                 return ret;
773         }
774 
775         #define CXACRU_DEVICE_CREATE_FILE(_name) \
776                 ret = device_create_file(&intf->dev, &dev_attr_##_name); \
777                 if (unlikely(ret)) \
778                         goto fail_sysfs;
779         CXACRU_ALL_FILES(CREATE);
780         #undef CXACRU_DEVICE_CREATE_FILE
781 
782         /* start ADSL */
783         mutex_lock(&instance->adsl_state_serialize);
784         ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
785         if (ret < 0)
786                 atm_err(usbatm_instance, "cxacru_atm_start: CHIP_ADSL_LINE_START returned %d\n", ret);
787 
788         /* Start status polling */
789         mutex_lock(&instance->poll_state_serialize);
790         switch (instance->poll_state) {
791         case CXPOLL_STOPPED:
792                 /* start polling */
793                 instance->poll_state = CXPOLL_POLLING;
794                 break;
795 
796         case CXPOLL_STOPPING:
797                 /* abort stop request */
798                 instance->poll_state = CXPOLL_POLLING;
799         case CXPOLL_POLLING:
800         case CXPOLL_SHUTDOWN:
801                 /* don't start polling */
802                 start_polling = 0;
803         }
804         mutex_unlock(&instance->poll_state_serialize);
805         mutex_unlock(&instance->adsl_state_serialize);
806 
807         printk(KERN_INFO "%s%d: %s %pM\n", atm_dev->type, atm_dev->number,
808                         usbatm_instance->description, atm_dev->esi);
809 
810         if (start_polling)
811                 cxacru_poll_status(&instance->poll_work.work);
812         return 0;
813 
814 fail_sysfs:
815         usb_err(usbatm_instance, "cxacru_atm_start: device_create_file failed (%d)\n", ret);
816         cxacru_remove_device_files(usbatm_instance, atm_dev);
817         return ret;
818 }
819 
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_printk(KERN_INFO, usbatm, "ADSL state: running\n");
855                         break;
856 
857                 case 1:
858                         atm_printk(KERN_INFO, usbatm, "ADSL state: stopped\n");
859                         break;
860 
861                 default:
862                         atm_printk(KERN_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 
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 static void cxacru_upload_firmware(struct cxacru_data *instance,
986                                    const struct firmware *fw,
987                                    const struct firmware *bp)
988 {
989         int ret;
990         struct usbatm_data *usbatm = instance->usbatm;
991         struct usb_device *usb_dev = usbatm->usb_dev;
992         __le16 signature[] = { usb_dev->descriptor.idVendor,
993                                usb_dev->descriptor.idProduct };
994         __le32 val;
995 
996         usb_dbg(usbatm, "%s\n", __func__);
997 
998         /* FirmwarePllFClkValue */
999         val = cpu_to_le32(instance->modem_type->pll_f_clk);
1000         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLFCLK_ADDR, (u8 *) &val, 4);
1001         if (ret) {
1002                 usb_err(usbatm, "FirmwarePllFClkValue failed: %d\n", ret);
1003                 return;
1004         }
1005 
1006         /* FirmwarePllBClkValue */
1007         val = cpu_to_le32(instance->modem_type->pll_b_clk);
1008         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLBCLK_ADDR, (u8 *) &val, 4);
1009         if (ret) {
1010                 usb_err(usbatm, "FirmwarePllBClkValue failed: %d\n", ret);
1011                 return;
1012         }
1013 
1014         /* Enable SDRAM */
1015         val = cpu_to_le32(SDRAM_ENA);
1016         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SDRAMEN_ADDR, (u8 *) &val, 4);
1017         if (ret) {
1018                 usb_err(usbatm, "Enable SDRAM failed: %d\n", ret);
1019                 return;
1020         }
1021 
1022         /* Firmware */
1023         usb_info(usbatm, "loading firmware\n");
1024         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, FW_ADDR, fw->data, fw->size);
1025         if (ret) {
1026                 usb_err(usbatm, "Firmware upload failed: %d\n", ret);
1027                 return;
1028         }
1029 
1030         /* Boot ROM patch */
1031         if (instance->modem_type->boot_rom_patch) {
1032                 usb_info(usbatm, "loading boot ROM patch\n");
1033                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_ADDR, bp->data, bp->size);
1034                 if (ret) {
1035                         usb_err(usbatm, "Boot ROM patching failed: %d\n", ret);
1036                         return;
1037                 }
1038         }
1039 
1040         /* Signature */
1041         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SIG_ADDR, (u8 *) signature, 4);
1042         if (ret) {
1043                 usb_err(usbatm, "Signature storing failed: %d\n", ret);
1044                 return;
1045         }
1046 
1047         usb_info(usbatm, "starting device\n");
1048         if (instance->modem_type->boot_rom_patch) {
1049                 val = cpu_to_le32(BR_ADDR);
1050                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_STACK_ADDR, (u8 *) &val, 4);
1051         } else {
1052                 ret = cxacru_fw(usb_dev, FW_GOTO_MEM, 0x0, 0x0, FW_ADDR, NULL, 0);
1053         }
1054         if (ret) {
1055                 usb_err(usbatm, "Passing control to firmware failed: %d\n", ret);
1056                 return;
1057         }
1058 
1059         /* Delay to allow firmware to start up. */
1060         msleep_interruptible(1000);
1061 
1062         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD));
1063         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD));
1064         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_DATA));
1065         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_DATA));
1066 
1067         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
1068         if (ret < 0) {
1069                 usb_err(usbatm, "modem failed to initialize: %d\n", ret);
1070                 return;
1071         }
1072 }
1073 
1074 static int cxacru_find_firmware(struct cxacru_data *instance,
1075                                 char *phase, const struct firmware **fw_p)
1076 {
1077         struct usbatm_data *usbatm = instance->usbatm;
1078         struct device *dev = &usbatm->usb_intf->dev;
1079         char buf[16];
1080 
1081         sprintf(buf, "cxacru-%s.bin", phase);
1082         usb_dbg(usbatm, "cxacru_find_firmware: looking for %s\n", buf);
1083 
1084         if (request_firmware(fw_p, buf, dev)) {
1085                 usb_dbg(usbatm, "no stage %s firmware found\n", phase);
1086                 return -ENOENT;
1087         }
1088 
1089         usb_info(usbatm, "found firmware %s\n", buf);
1090 
1091         return 0;
1092 }
1093 
1094 static int cxacru_heavy_init(struct usbatm_data *usbatm_instance,
1095                              struct usb_interface *usb_intf)
1096 {
1097         const struct firmware *fw, *bp;
1098         struct cxacru_data *instance = usbatm_instance->driver_data;
1099         int ret = cxacru_find_firmware(instance, "fw", &fw);
1100 
1101         if (ret) {
1102                 usb_warn(usbatm_instance, "firmware (cxacru-fw.bin) unavailable (system misconfigured?)\n");
1103                 return ret;
1104         }
1105 
1106         if (instance->modem_type->boot_rom_patch) {
1107                 ret = cxacru_find_firmware(instance, "bp", &bp);
1108                 if (ret) {
1109                         usb_warn(usbatm_instance, "boot ROM patch (cxacru-bp.bin) unavailable (system misconfigured?)\n");
1110                         release_firmware(fw);
1111                         return ret;
1112                 }
1113         }
1114 
1115         cxacru_upload_firmware(instance, fw, bp);
1116 
1117         if (instance->modem_type->boot_rom_patch)
1118                 release_firmware(bp);
1119         release_firmware(fw);
1120 
1121         ret = cxacru_card_status(instance);
1122         if (ret)
1123                 usb_dbg(usbatm_instance, "modem initialisation failed\n");
1124         else
1125                 usb_dbg(usbatm_instance, "done setting up the modem\n");
1126 
1127         return ret;
1128 }
1129 
1130 static int cxacru_bind(struct usbatm_data *usbatm_instance,
1131                        struct usb_interface *intf, const struct usb_device_id *id)
1132 {
1133         struct cxacru_data *instance;
1134         struct usb_device *usb_dev = interface_to_usbdev(intf);
1135         struct usb_host_endpoint *cmd_ep = usb_dev->ep_in[CXACRU_EP_CMD];
1136         int ret;
1137 
1138         /* instance init */
1139         instance = kzalloc(sizeof(*instance), GFP_KERNEL);
1140         if (!instance) {
1141                 usb_dbg(usbatm_instance, "cxacru_bind: no memory for instance data\n");
1142                 return -ENOMEM;
1143         }
1144 
1145         instance->usbatm = usbatm_instance;
1146         instance->modem_type = (struct cxacru_modem_type *) id->driver_info;
1147 
1148         mutex_init(&instance->poll_state_serialize);
1149         instance->poll_state = CXPOLL_STOPPED;
1150         instance->line_status = -1;
1151         instance->adsl_status = -1;
1152 
1153         mutex_init(&instance->adsl_state_serialize);
1154 
1155         instance->rcv_buf = (u8 *) __get_free_page(GFP_KERNEL);
1156         if (!instance->rcv_buf) {
1157                 usb_dbg(usbatm_instance, "cxacru_bind: no memory for rcv_buf\n");
1158                 ret = -ENOMEM;
1159                 goto fail;
1160         }
1161         instance->snd_buf = (u8 *) __get_free_page(GFP_KERNEL);
1162         if (!instance->snd_buf) {
1163                 usb_dbg(usbatm_instance, "cxacru_bind: no memory for snd_buf\n");
1164                 ret = -ENOMEM;
1165                 goto fail;
1166         }
1167         instance->rcv_urb = usb_alloc_urb(0, GFP_KERNEL);
1168         if (!instance->rcv_urb) {
1169                 usb_dbg(usbatm_instance, "cxacru_bind: no memory for rcv_urb\n");
1170                 ret = -ENOMEM;
1171                 goto fail;
1172         }
1173         instance->snd_urb = usb_alloc_urb(0, GFP_KERNEL);
1174         if (!instance->snd_urb) {
1175                 usb_dbg(usbatm_instance, "cxacru_bind: no memory for snd_urb\n");
1176                 ret = -ENOMEM;
1177                 goto fail;
1178         }
1179 
1180         if (!cmd_ep) {
1181                 usb_dbg(usbatm_instance, "cxacru_bind: no command endpoint\n");
1182                 ret = -ENODEV;
1183                 goto fail;
1184         }
1185 
1186         if ((cmd_ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1187                         == USB_ENDPOINT_XFER_INT) {
1188                 usb_fill_int_urb(instance->rcv_urb,
1189                         usb_dev, usb_rcvintpipe(usb_dev, CXACRU_EP_CMD),
1190                         instance->rcv_buf, PAGE_SIZE,
1191                         cxacru_blocking_completion, &instance->rcv_done, 1);
1192 
1193                 usb_fill_int_urb(instance->snd_urb,
1194                         usb_dev, usb_sndintpipe(usb_dev, CXACRU_EP_CMD),
1195                         instance->snd_buf, PAGE_SIZE,
1196                         cxacru_blocking_completion, &instance->snd_done, 4);
1197         } else {
1198                 usb_fill_bulk_urb(instance->rcv_urb,
1199                         usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD),
1200                         instance->rcv_buf, PAGE_SIZE,
1201                         cxacru_blocking_completion, &instance->rcv_done);
1202 
1203                 usb_fill_bulk_urb(instance->snd_urb,
1204                         usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
1205                         instance->snd_buf, PAGE_SIZE,
1206                         cxacru_blocking_completion, &instance->snd_done);
1207         }
1208 
1209         mutex_init(&instance->cm_serialize);
1210 
1211         INIT_DELAYED_WORK(&instance->poll_work, cxacru_poll_status);
1212 
1213         usbatm_instance->driver_data = instance;
1214 
1215         usbatm_instance->flags = (cxacru_card_status(instance) ? 0 : UDSL_SKIP_HEAVY_INIT);
1216 
1217         return 0;
1218 
1219  fail:
1220         free_page((unsigned long) instance->snd_buf);
1221         free_page((unsigned long) instance->rcv_buf);
1222         usb_free_urb(instance->snd_urb);
1223         usb_free_urb(instance->rcv_urb);
1224         kfree(instance);
1225 
1226         return ret;
1227 }
1228 
1229 static void cxacru_unbind(struct usbatm_data *usbatm_instance,
1230                 struct usb_interface *intf)
1231 {
1232         struct cxacru_data *instance = usbatm_instance->driver_data;
1233         int is_polling = 1;
1234 
1235         usb_dbg(usbatm_instance, "cxacru_unbind entered\n");
1236 
1237         if (!instance) {
1238                 usb_dbg(usbatm_instance, "cxacru_unbind: NULL instance!\n");
1239                 return;
1240         }
1241 
1242         mutex_lock(&instance->poll_state_serialize);
1243         BUG_ON(instance->poll_state == CXPOLL_SHUTDOWN);
1244 
1245         /* ensure that status polling continues unless
1246          * it has already stopped */
1247         if (instance->poll_state == CXPOLL_STOPPED)
1248                 is_polling = 0;
1249 
1250         /* stop polling from being stopped or started */
1251         instance->poll_state = CXPOLL_SHUTDOWN;
1252         mutex_unlock(&instance->poll_state_serialize);
1253 
1254         if (is_polling)
1255                 cancel_delayed_work_sync(&instance->poll_work);
1256 
1257         usb_kill_urb(instance->snd_urb);
1258         usb_kill_urb(instance->rcv_urb);
1259         usb_free_urb(instance->snd_urb);
1260         usb_free_urb(instance->rcv_urb);
1261 
1262         free_page((unsigned long) instance->snd_buf);
1263         free_page((unsigned long) instance->rcv_buf);
1264 
1265         kfree(instance);
1266 
1267         usbatm_instance->driver_data = NULL;
1268 }
1269 
1270 static const struct cxacru_modem_type cxacru_cafe = {
1271         .pll_f_clk = 0x02d874df,
1272         .pll_b_clk = 0x0196a51a,
1273         .boot_rom_patch = 1,
1274 };
1275 
1276 static const struct cxacru_modem_type cxacru_cb00 = {
1277         .pll_f_clk = 0x5,
1278         .pll_b_clk = 0x3,
1279         .boot_rom_patch = 0,
1280 };
1281 
1282 static const struct usb_device_id cxacru_usb_ids[] = {
1283         { /* V = Conexant                       P = ADSL modem (Euphrates project)      */
1284                 USB_DEVICE(0x0572, 0xcafe),     .driver_info = (unsigned long) &cxacru_cafe
1285         },
1286         { /* V = Conexant                       P = ADSL modem (Hasbani project)        */
1287                 USB_DEVICE(0x0572, 0xcb00),     .driver_info = (unsigned long) &cxacru_cb00
1288         },
1289         { /* V = Conexant                       P = ADSL modem                          */
1290                 USB_DEVICE(0x0572, 0xcb01),     .driver_info = (unsigned long) &cxacru_cb00
1291         },
1292         { /* V = Conexant                       P = ADSL modem (Well PTI-800) */
1293                 USB_DEVICE(0x0572, 0xcb02),     .driver_info = (unsigned long) &cxacru_cb00
1294         },
1295         { /* V = Conexant                       P = ADSL modem                          */
1296                 USB_DEVICE(0x0572, 0xcb06),     .driver_info = (unsigned long) &cxacru_cb00
1297         },
1298         { /* V = Conexant                       P = ADSL modem (ZTE ZXDSL 852)          */
1299                 USB_DEVICE(0x0572, 0xcb07),     .driver_info = (unsigned long) &cxacru_cb00
1300         },
1301         { /* V = Olitec                         P = ADSL modem version 2                */
1302                 USB_DEVICE(0x08e3, 0x0100),     .driver_info = (unsigned long) &cxacru_cafe
1303         },
1304         { /* V = Olitec                         P = ADSL modem version 3                */
1305                 USB_DEVICE(0x08e3, 0x0102),     .driver_info = (unsigned long) &cxacru_cb00
1306         },
1307         { /* V = Trust/Amigo Technology Co.     P = AMX-CA86U                           */
1308                 USB_DEVICE(0x0eb0, 0x3457),     .driver_info = (unsigned long) &cxacru_cafe
1309         },
1310         { /* V = Zoom                           P = 5510                                */
1311                 USB_DEVICE(0x1803, 0x5510),     .driver_info = (unsigned long) &cxacru_cb00
1312         },
1313         { /* V = Draytek                        P = Vigor 318                           */
1314                 USB_DEVICE(0x0675, 0x0200),     .driver_info = (unsigned long) &cxacru_cb00
1315         },
1316         { /* V = Zyxel                          P = 630-C1 aka OMNI ADSL USB (Annex A)  */
1317                 USB_DEVICE(0x0586, 0x330a),     .driver_info = (unsigned long) &cxacru_cb00
1318         },
1319         { /* V = Zyxel                          P = 630-C3 aka OMNI ADSL USB (Annex B)  */
1320                 USB_DEVICE(0x0586, 0x330b),     .driver_info = (unsigned long) &cxacru_cb00
1321         },
1322         { /* V = Aethra                         P = Starmodem UM1020                    */
1323                 USB_DEVICE(0x0659, 0x0020),     .driver_info = (unsigned long) &cxacru_cb00
1324         },
1325         { /* V = Aztech Systems                 P = ? AKA Pirelli AUA-010               */
1326                 USB_DEVICE(0x0509, 0x0812),     .driver_info = (unsigned long) &cxacru_cb00
1327         },
1328         { /* V = Netopia                        P = Cayman 3341(Annex A)/3351(Annex B)  */
1329                 USB_DEVICE(0x100d, 0xcb01),     .driver_info = (unsigned long) &cxacru_cb00
1330         },
1331         { /* V = Netopia                        P = Cayman 3342(Annex A)/3352(Annex B)  */
1332                 USB_DEVICE(0x100d, 0x3342),     .driver_info = (unsigned long) &cxacru_cb00
1333         },
1334         {}
1335 };
1336 
1337 MODULE_DEVICE_TABLE(usb, cxacru_usb_ids);
1338 
1339 static struct usbatm_driver cxacru_driver = {
1340         .driver_name    = cxacru_driver_name,
1341         .bind           = cxacru_bind,
1342         .heavy_init     = cxacru_heavy_init,
1343         .unbind         = cxacru_unbind,
1344         .atm_start      = cxacru_atm_start,
1345         .atm_stop       = cxacru_remove_device_files,
1346         .bulk_in        = CXACRU_EP_DATA,
1347         .bulk_out       = CXACRU_EP_DATA,
1348         .rx_padding     = 3,
1349         .tx_padding     = 11,
1350 };
1351 
1352 static int cxacru_usb_probe(struct usb_interface *intf,
1353                 const struct usb_device_id *id)
1354 {
1355         struct usb_device *usb_dev = interface_to_usbdev(intf);
1356         char buf[15];
1357 
1358         /* Avoid ADSL routers (cx82310_eth).
1359          * Abort if bDeviceClass is 0xff and iProduct is "USB NET CARD".
1360          */
1361         if (usb_dev->descriptor.bDeviceClass == USB_CLASS_VENDOR_SPEC
1362                         && usb_string(usb_dev, usb_dev->descriptor.iProduct,
1363                                 buf, sizeof(buf)) > 0) {
1364                 if (!strcmp(buf, "USB NET CARD")) {
1365                         dev_info(&intf->dev, "ignoring cx82310_eth device\n");
1366                         return -ENODEV;
1367                 }
1368         }
1369 
1370         return usbatm_usb_probe(intf, id, &cxacru_driver);
1371 }
1372 
1373 static struct usb_driver cxacru_usb_driver = {
1374         .name           = cxacru_driver_name,
1375         .probe          = cxacru_usb_probe,
1376         .disconnect     = usbatm_usb_disconnect,
1377         .id_table       = cxacru_usb_ids
1378 };
1379 
1380 module_usb_driver(cxacru_usb_driver);
1381 
1382 MODULE_AUTHOR(DRIVER_AUTHOR);
1383 MODULE_DESCRIPTION(DRIVER_DESC);
1384 MODULE_LICENSE("GPL");
1385 MODULE_VERSION(DRIVER_VERSION);
1386 

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