Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

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         if (unlikely(value >= ARRAY_SIZE(str)))
274                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
275         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
276 }
277 
278 static ssize_t cxacru_sysfs_showattr_LINK(u32 value, char *buf)
279 {
280         static char *str[] = { NULL, "not connected", "connected", "lost" };
281         if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL))
282                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
283         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
284 }
285 
286 static ssize_t cxacru_sysfs_showattr_LINE(u32 value, char *buf)
287 {
288         static char *str[] = { "down", "attempting to activate",
289                 "training", "channel analysis", "exchange", "up",
290                 "waiting", "initialising"
291         };
292         if (unlikely(value >= ARRAY_SIZE(str)))
293                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
294         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
295 }
296 
297 static ssize_t cxacru_sysfs_showattr_MODU(u32 value, char *buf)
298 {
299         static char *str[] = {
300                         "",
301                         "ANSI T1.413",
302                         "ITU-T G.992.1 (G.DMT)",
303                         "ITU-T G.992.2 (G.LITE)"
304         };
305         if (unlikely(value >= ARRAY_SIZE(str)))
306                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
307         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
308 }
309 
310 /*
311  * This could use MAC_ADDRESS_HIGH and MAC_ADDRESS_LOW, but since
312  * this data is already in atm_dev there's no point.
313  *
314  * MAC_ADDRESS_HIGH = 0x????5544
315  * MAC_ADDRESS_LOW  = 0x33221100
316  * Where 00-55 are bytes 0-5 of the MAC.
317  */
318 static ssize_t cxacru_sysfs_show_mac_address(struct device *dev,
319         struct device_attribute *attr, char *buf)
320 {
321         struct cxacru_data *instance = to_usbatm_driver_data(
322                         to_usb_interface(dev));
323 
324         if (instance == NULL || instance->usbatm->atm_dev == NULL)
325                 return -ENODEV;
326 
327         return snprintf(buf, PAGE_SIZE, "%pM\n",
328                 instance->usbatm->atm_dev->esi);
329 }
330 
331 static ssize_t cxacru_sysfs_show_adsl_state(struct device *dev,
332         struct device_attribute *attr, char *buf)
333 {
334         static char *str[] = { "running", "stopped" };
335         struct cxacru_data *instance = to_usbatm_driver_data(
336                         to_usb_interface(dev));
337         u32 value;
338 
339         if (instance == NULL)
340                 return -ENODEV;
341 
342         value = instance->card_info[CXINF_LINE_STARTABLE];
343         if (unlikely(value >= ARRAY_SIZE(str)))
344                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
345         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
346 }
347 
348 static ssize_t cxacru_sysfs_store_adsl_state(struct device *dev,
349         struct device_attribute *attr, const char *buf, size_t count)
350 {
351         struct cxacru_data *instance = to_usbatm_driver_data(
352                         to_usb_interface(dev));
353         int ret;
354         int poll = -1;
355         char str_cmd[8];
356         int len = strlen(buf);
357 
358         if (!capable(CAP_NET_ADMIN))
359                 return -EACCES;
360 
361         ret = sscanf(buf, "%7s", str_cmd);
362         if (ret != 1)
363                 return -EINVAL;
364         ret = 0;
365 
366         if (instance == NULL)
367                 return -ENODEV;
368 
369         if (mutex_lock_interruptible(&instance->adsl_state_serialize))
370                 return -ERESTARTSYS;
371 
372         if (!strcmp(str_cmd, "stop") || !strcmp(str_cmd, "restart")) {
373                 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_STOP, NULL, 0, NULL, 0);
374                 if (ret < 0) {
375                         atm_err(instance->usbatm, "change adsl state:"
376                                 " CHIP_ADSL_LINE_STOP returned %d\n", ret);
377 
378                         ret = -EIO;
379                 } else {
380                         ret = len;
381                         poll = CXPOLL_STOPPED;
382                 }
383         }
384 
385         /* Line status is only updated every second
386          * and the device appears to only react to
387          * START/STOP every second too. Wait 1.5s to
388          * be sure that restart will have an effect. */
389         if (!strcmp(str_cmd, "restart"))
390                 msleep(1500);
391 
392         if (!strcmp(str_cmd, "start") || !strcmp(str_cmd, "restart")) {
393                 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
394                 if (ret < 0) {
395                         atm_err(instance->usbatm, "change adsl state:"
396                                 " CHIP_ADSL_LINE_START returned %d\n", ret);
397 
398                         ret = -EIO;
399                 } else {
400                         ret = len;
401                         poll = CXPOLL_POLLING;
402                 }
403         }
404 
405         if (!strcmp(str_cmd, "poll")) {
406                 ret = len;
407                 poll = CXPOLL_POLLING;
408         }
409 
410         if (ret == 0) {
411                 ret = -EINVAL;
412                 poll = -1;
413         }
414 
415         if (poll == CXPOLL_POLLING) {
416                 mutex_lock(&instance->poll_state_serialize);
417                 switch (instance->poll_state) {
418                 case CXPOLL_STOPPED:
419                         /* start polling */
420                         instance->poll_state = CXPOLL_POLLING;
421                         break;
422 
423                 case CXPOLL_STOPPING:
424                         /* abort stop request */
425                         instance->poll_state = CXPOLL_POLLING;
426                 case CXPOLL_POLLING:
427                 case CXPOLL_SHUTDOWN:
428                         /* don't start polling */
429                         poll = -1;
430                 }
431                 mutex_unlock(&instance->poll_state_serialize);
432         } else if (poll == CXPOLL_STOPPED) {
433                 mutex_lock(&instance->poll_state_serialize);
434                 /* request stop */
435                 if (instance->poll_state == CXPOLL_POLLING)
436                         instance->poll_state = CXPOLL_STOPPING;
437                 mutex_unlock(&instance->poll_state_serialize);
438         }
439 
440         mutex_unlock(&instance->adsl_state_serialize);
441 
442         if (poll == CXPOLL_POLLING)
443                 cxacru_poll_status(&instance->poll_work.work);
444 
445         return ret;
446 }
447 
448 /* CM_REQUEST_CARD_DATA_GET times out, so no show attribute */
449 
450 static ssize_t cxacru_sysfs_store_adsl_config(struct device *dev,
451         struct device_attribute *attr, const char *buf, size_t count)
452 {
453         struct cxacru_data *instance = to_usbatm_driver_data(
454                         to_usb_interface(dev));
455         int len = strlen(buf);
456         int ret, pos, num;
457         __le32 data[CMD_PACKET_SIZE / 4];
458 
459         if (!capable(CAP_NET_ADMIN))
460                 return -EACCES;
461 
462         if (instance == NULL)
463                 return -ENODEV;
464 
465         pos = 0;
466         num = 0;
467         while (pos < len) {
468                 int tmp;
469                 u32 index;
470                 u32 value;
471 
472                 ret = sscanf(buf + pos, "%x=%x%n", &index, &value, &tmp);
473                 if (ret < 2)
474                         return -EINVAL;
475                 if (index < 0 || index > 0x7f)
476                         return -EINVAL;
477                 pos += tmp;
478 
479                 /* skip trailing newline */
480                 if (buf[pos] == '\n' && pos == len-1)
481                         pos++;
482 
483                 data[num * 2 + 1] = cpu_to_le32(index);
484                 data[num * 2 + 2] = cpu_to_le32(value);
485                 num++;
486 
487                 /* send config values when data buffer is full
488                  * or no more data
489                  */
490                 if (pos >= len || num >= CMD_MAX_CONFIG) {
491                         char log[CMD_MAX_CONFIG * 12 + 1]; /* %02x=%08x */
492 
493                         data[0] = cpu_to_le32(num);
494                         ret = cxacru_cm(instance, CM_REQUEST_CARD_DATA_SET,
495                                 (u8 *) data, 4 + num * 8, NULL, 0);
496                         if (ret < 0) {
497                                 atm_err(instance->usbatm,
498                                         "set card data returned %d\n", ret);
499                                 return -EIO;
500                         }
501 
502                         for (tmp = 0; tmp < num; tmp++)
503                                 snprintf(log + tmp*12, 13, " %02x=%08x",
504                                         le32_to_cpu(data[tmp * 2 + 1]),
505                                         le32_to_cpu(data[tmp * 2 + 2]));
506                         atm_info(instance->usbatm, "config%s\n", log);
507                         num = 0;
508                 }
509         }
510 
511         return len;
512 }
513 
514 /*
515  * All device attributes are included in CXACRU_ALL_FILES
516  * so that the same list can be used multiple times:
517  *     INIT   (define the device attributes)
518  *     CREATE (create all the device files)
519  *     REMOVE (remove all the device files)
520  *
521  * With the last two being defined as needed in the functions
522  * they are used in before calling CXACRU_ALL_FILES()
523  */
524 #define CXACRU_ALL_FILES(_action) \
525 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_RATE,           u32,  downstream_rate); \
526 CXACRU_ATTR_##_action(CXINF_UPSTREAM_RATE,             u32,  upstream_rate); \
527 CXACRU_ATTR_##_action(CXINF_LINK_STATUS,               LINK, link_status); \
528 CXACRU_ATTR_##_action(CXINF_LINE_STATUS,               LINE, line_status); \
529 CXACRU__ATTR_##_action(                                      mac_address); \
530 CXACRU_ATTR_##_action(CXINF_UPSTREAM_SNR_MARGIN,       dB,   upstream_snr_margin); \
531 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_SNR_MARGIN,     dB,   downstream_snr_margin); \
532 CXACRU_ATTR_##_action(CXINF_UPSTREAM_ATTENUATION,      dB,   upstream_attenuation); \
533 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_ATTENUATION,    dB,   downstream_attenuation); \
534 CXACRU_ATTR_##_action(CXINF_TRANSMITTER_POWER,         s8,   transmitter_power); \
535 CXACRU_ATTR_##_action(CXINF_UPSTREAM_BITS_PER_FRAME,   u32,  upstream_bits_per_frame); \
536 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_BITS_PER_FRAME, u32,  downstream_bits_per_frame); \
537 CXACRU_ATTR_##_action(CXINF_STARTUP_ATTEMPTS,          u32,  startup_attempts); \
538 CXACRU_ATTR_##_action(CXINF_UPSTREAM_CRC_ERRORS,       u32,  upstream_crc_errors); \
539 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_CRC_ERRORS,     u32,  downstream_crc_errors); \
540 CXACRU_ATTR_##_action(CXINF_UPSTREAM_FEC_ERRORS,       u32,  upstream_fec_errors); \
541 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_FEC_ERRORS,     u32,  downstream_fec_errors); \
542 CXACRU_ATTR_##_action(CXINF_UPSTREAM_HEC_ERRORS,       u32,  upstream_hec_errors); \
543 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_HEC_ERRORS,     u32,  downstream_hec_errors); \
544 CXACRU_ATTR_##_action(CXINF_LINE_STARTABLE,            bool, line_startable); \
545 CXACRU_ATTR_##_action(CXINF_MODULATION,                MODU, modulation); \
546 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND,              u32,  adsl_headend); \
547 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND_ENVIRONMENT,  u32,  adsl_headend_environment); \
548 CXACRU_ATTR_##_action(CXINF_CONTROLLER_VERSION,        u32,  adsl_controller_version); \
549 CXACRU_CMD_##_action(                                        adsl_state); \
550 CXACRU_SET_##_action(                                        adsl_config);
551 
552 CXACRU_ALL_FILES(INIT);
553 
554 /* the following three functions are stolen from drivers/usb/core/message.c */
555 static void cxacru_blocking_completion(struct urb *urb)
556 {
557         complete(urb->context);
558 }
559 
560 static void cxacru_timeout_kill(unsigned long data)
561 {
562         usb_unlink_urb((struct urb *) data);
563 }
564 
565 static int cxacru_start_wait_urb(struct urb *urb, struct completion *done,
566                                  int *actual_length)
567 {
568         struct timer_list timer;
569 
570         init_timer(&timer);
571         timer.expires = jiffies + msecs_to_jiffies(CMD_TIMEOUT);
572         timer.data = (unsigned long) urb;
573         timer.function = cxacru_timeout_kill;
574         add_timer(&timer);
575         wait_for_completion(done);
576         del_timer_sync(&timer);
577 
578         if (actual_length)
579                 *actual_length = urb->actual_length;
580         return urb->status; /* must read status after completion */
581 }
582 
583 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
584                      u8 *wdata, int wsize, u8 *rdata, int rsize)
585 {
586         int ret, actlen;
587         int offb, offd;
588         const int stride = CMD_PACKET_SIZE - 4;
589         u8 *wbuf = instance->snd_buf;
590         u8 *rbuf = instance->rcv_buf;
591         int wbuflen = ((wsize - 1) / stride + 1) * CMD_PACKET_SIZE;
592         int rbuflen = ((rsize - 1) / stride + 1) * CMD_PACKET_SIZE;
593 
594         if (wbuflen > PAGE_SIZE || rbuflen > PAGE_SIZE) {
595                 if (printk_ratelimit())
596                         usb_err(instance->usbatm, "requested transfer size too large (%d, %d)\n",
597                                 wbuflen, rbuflen);
598                 ret = -ENOMEM;
599                 goto err;
600         }
601 
602         mutex_lock(&instance->cm_serialize);
603 
604         /* submit reading urb before the writing one */
605         init_completion(&instance->rcv_done);
606         ret = usb_submit_urb(instance->rcv_urb, GFP_KERNEL);
607         if (ret < 0) {
608                 if (printk_ratelimit())
609                         usb_err(instance->usbatm, "submit of read urb for cm %#x failed (%d)\n",
610                                 cm, ret);
611                 goto fail;
612         }
613 
614         memset(wbuf, 0, wbuflen);
615         /* handle wsize == 0 */
616         wbuf[0] = cm;
617         for (offb = offd = 0; offd < wsize; offd += stride, offb += CMD_PACKET_SIZE) {
618                 wbuf[offb] = cm;
619                 memcpy(wbuf + offb + 4, wdata + offd, min_t(int, stride, wsize - offd));
620         }
621 
622         instance->snd_urb->transfer_buffer_length = wbuflen;
623         init_completion(&instance->snd_done);
624         ret = usb_submit_urb(instance->snd_urb, GFP_KERNEL);
625         if (ret < 0) {
626                 if (printk_ratelimit())
627                         usb_err(instance->usbatm, "submit of write urb for cm %#x failed (%d)\n",
628                                 cm, ret);
629                 goto fail;
630         }
631 
632         ret = cxacru_start_wait_urb(instance->snd_urb, &instance->snd_done, NULL);
633         if (ret < 0) {
634                 if (printk_ratelimit())
635                         usb_err(instance->usbatm, "send of cm %#x failed (%d)\n", cm, ret);
636                 goto fail;
637         }
638 
639         ret = cxacru_start_wait_urb(instance->rcv_urb, &instance->rcv_done, &actlen);
640         if (ret < 0) {
641                 if (printk_ratelimit())
642                         usb_err(instance->usbatm, "receive of cm %#x failed (%d)\n", cm, ret);
643                 goto fail;
644         }
645         if (actlen % CMD_PACKET_SIZE || !actlen) {
646                 if (printk_ratelimit())
647                         usb_err(instance->usbatm, "invalid response length to cm %#x: %d\n",
648                                 cm, actlen);
649                 ret = -EIO;
650                 goto fail;
651         }
652 
653         /* check the return status and copy the data to the output buffer, if needed */
654         for (offb = offd = 0; offd < rsize && offb < actlen; offb += CMD_PACKET_SIZE) {
655                 if (rbuf[offb] != cm) {
656                         if (printk_ratelimit())
657                                 usb_err(instance->usbatm, "wrong cm %#x in response to cm %#x\n",
658                                         rbuf[offb], cm);
659                         ret = -EIO;
660                         goto fail;
661                 }
662                 if (rbuf[offb + 1] != CM_STATUS_SUCCESS) {
663                         if (printk_ratelimit())
664                                 usb_err(instance->usbatm, "response to cm %#x failed: %#x\n",
665                                         cm, rbuf[offb + 1]);
666                         ret = -EIO;
667                         goto fail;
668                 }
669                 if (offd >= rsize)
670                         break;
671                 memcpy(rdata + offd, rbuf + offb + 4, min_t(int, stride, rsize - offd));
672                 offd += stride;
673         }
674 
675         ret = offd;
676         usb_dbg(instance->usbatm, "cm %#x\n", cm);
677 fail:
678         mutex_unlock(&instance->cm_serialize);
679 err:
680         return ret;
681 }
682 
683 static int cxacru_cm_get_array(struct cxacru_data *instance, enum cxacru_cm_request cm,
684                                u32 *data, int size)
685 {
686         int ret, len;
687         __le32 *buf;
688         int offb;
689         unsigned int offd;
690         const int stride = CMD_PACKET_SIZE / (4 * 2) - 1;
691         int buflen =  ((size - 1) / stride + 1 + size * 2) * 4;
692 
693         buf = kmalloc(buflen, GFP_KERNEL);
694         if (!buf)
695                 return -ENOMEM;
696 
697         ret = cxacru_cm(instance, cm, NULL, 0, (u8 *) buf, buflen);
698         if (ret < 0)
699                 goto cleanup;
700 
701         /* len > 0 && len % 4 == 0 guaranteed by cxacru_cm() */
702         len = ret / 4;
703         for (offb = 0; offb < len; ) {
704                 int l = le32_to_cpu(buf[offb++]);
705                 if (l < 0 || l > stride || l > (len - offb) / 2) {
706                         if (printk_ratelimit())
707                                 usb_err(instance->usbatm, "invalid data length from cm %#x: %d\n",
708                                         cm, l);
709                         ret = -EIO;
710                         goto cleanup;
711                 }
712                 while (l--) {
713                         offd = le32_to_cpu(buf[offb++]);
714                         if (offd >= size) {
715                                 if (printk_ratelimit())
716                                         usb_err(instance->usbatm, "wrong index %#x in response to cm %#x\n",
717                                                 offd, cm);
718                                 ret = -EIO;
719                                 goto cleanup;
720                         }
721                         data[offd] = le32_to_cpu(buf[offb++]);
722                 }
723         }
724 
725         ret = 0;
726 
727 cleanup:
728         kfree(buf);
729         return ret;
730 }
731 
732 static int cxacru_card_status(struct cxacru_data *instance)
733 {
734         int ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
735         if (ret < 0) {          /* firmware not loaded */
736                 usb_dbg(instance->usbatm, "cxacru_adsl_start: CARD_GET_STATUS returned %d\n", ret);
737                 return ret;
738         }
739         return 0;
740 }
741 
742 static void cxacru_remove_device_files(struct usbatm_data *usbatm_instance,
743                 struct atm_dev *atm_dev)
744 {
745         struct usb_interface *intf = usbatm_instance->usb_intf;
746 
747         #define CXACRU_DEVICE_REMOVE_FILE(_name) \
748                 device_remove_file(&intf->dev, &dev_attr_##_name);
749         CXACRU_ALL_FILES(REMOVE);
750         #undef CXACRU_DEVICE_REMOVE_FILE
751 }
752 
753 static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
754                 struct atm_dev *atm_dev)
755 {
756         struct cxacru_data *instance = usbatm_instance->driver_data;
757         struct usb_interface *intf = usbatm_instance->usb_intf;
758         int ret;
759         int start_polling = 1;
760 
761         dev_dbg(&intf->dev, "%s\n", __func__);
762 
763         /* Read MAC address */
764         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_MAC_ADDRESS, NULL, 0,
765                         atm_dev->esi, sizeof(atm_dev->esi));
766         if (ret < 0) {
767                 atm_err(usbatm_instance, "cxacru_atm_start: CARD_GET_MAC_ADDRESS returned %d\n", ret);
768                 return ret;
769         }
770 
771         #define CXACRU_DEVICE_CREATE_FILE(_name) \
772                 ret = device_create_file(&intf->dev, &dev_attr_##_name); \
773                 if (unlikely(ret)) \
774                         goto fail_sysfs;
775         CXACRU_ALL_FILES(CREATE);
776         #undef CXACRU_DEVICE_CREATE_FILE
777 
778         /* start ADSL */
779         mutex_lock(&instance->adsl_state_serialize);
780         ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
781         if (ret < 0)
782                 atm_err(usbatm_instance, "cxacru_atm_start: CHIP_ADSL_LINE_START returned %d\n", ret);
783 
784         /* Start status polling */
785         mutex_lock(&instance->poll_state_serialize);
786         switch (instance->poll_state) {
787         case CXPOLL_STOPPED:
788                 /* start polling */
789                 instance->poll_state = CXPOLL_POLLING;
790                 break;
791 
792         case CXPOLL_STOPPING:
793                 /* abort stop request */
794                 instance->poll_state = CXPOLL_POLLING;
795         case CXPOLL_POLLING:
796         case CXPOLL_SHUTDOWN:
797                 /* don't start polling */
798                 start_polling = 0;
799         }
800         mutex_unlock(&instance->poll_state_serialize);
801         mutex_unlock(&instance->adsl_state_serialize);
802 
803         printk(KERN_INFO "%s%d: %s %pM\n", atm_dev->type, atm_dev->number,
804                         usbatm_instance->description, atm_dev->esi);
805 
806         if (start_polling)
807                 cxacru_poll_status(&instance->poll_work.work);
808         return 0;
809 
810 fail_sysfs:
811         usb_err(usbatm_instance, "cxacru_atm_start: device_create_file failed (%d)\n", ret);
812         cxacru_remove_device_files(usbatm_instance, atm_dev);
813         return ret;
814 }
815 
816 static void cxacru_poll_status(struct work_struct *work)
817 {
818         struct cxacru_data *instance =
819                 container_of(work, struct cxacru_data, poll_work.work);
820         u32 buf[CXINF_MAX] = {};
821         struct usbatm_data *usbatm = instance->usbatm;
822         struct atm_dev *atm_dev = usbatm->atm_dev;
823         int keep_polling = 1;
824         int ret;
825 
826         ret = cxacru_cm_get_array(instance, CM_REQUEST_CARD_INFO_GET, buf, CXINF_MAX);
827         if (ret < 0) {
828                 if (ret != -ESHUTDOWN)
829                         atm_warn(usbatm, "poll status: error %d\n", ret);
830 
831                 mutex_lock(&instance->poll_state_serialize);
832                 if (instance->poll_state != CXPOLL_SHUTDOWN) {
833                         instance->poll_state = CXPOLL_STOPPED;
834 
835                         if (ret != -ESHUTDOWN)
836                                 atm_warn(usbatm, "polling disabled, set adsl_state"
837                                                 " to 'start' or 'poll' to resume\n");
838                 }
839                 mutex_unlock(&instance->poll_state_serialize);
840                 goto reschedule;
841         }
842 
843         memcpy(instance->card_info, buf, sizeof(instance->card_info));
844 
845         if (instance->adsl_status != buf[CXINF_LINE_STARTABLE]) {
846                 instance->adsl_status = buf[CXINF_LINE_STARTABLE];
847 
848                 switch (instance->adsl_status) {
849                 case 0:
850                         atm_printk(KERN_INFO, usbatm, "ADSL state: running\n");
851                         break;
852 
853                 case 1:
854                         atm_printk(KERN_INFO, usbatm, "ADSL state: stopped\n");
855                         break;
856 
857                 default:
858                         atm_printk(KERN_INFO, usbatm, "Unknown adsl status %02x\n", instance->adsl_status);
859                         break;
860                 }
861         }
862 
863         if (instance->line_status == buf[CXINF_LINE_STATUS])
864                 goto reschedule;
865 
866         instance->line_status = buf[CXINF_LINE_STATUS];
867         switch (instance->line_status) {
868         case 0:
869                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
870                 atm_info(usbatm, "ADSL line: down\n");
871                 break;
872 
873         case 1:
874                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
875                 atm_info(usbatm, "ADSL line: attempting to activate\n");
876                 break;
877 
878         case 2:
879                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
880                 atm_info(usbatm, "ADSL line: training\n");
881                 break;
882 
883         case 3:
884                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
885                 atm_info(usbatm, "ADSL line: channel analysis\n");
886                 break;
887 
888         case 4:
889                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
890                 atm_info(usbatm, "ADSL line: exchange\n");
891                 break;
892 
893         case 5:
894                 atm_dev->link_rate = buf[CXINF_DOWNSTREAM_RATE] * 1000 / 424;
895                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_FOUND);
896 
897                 atm_info(usbatm, "ADSL line: up (%d kb/s down | %d kb/s up)\n",
898                      buf[CXINF_DOWNSTREAM_RATE], buf[CXINF_UPSTREAM_RATE]);
899                 break;
900 
901         case 6:
902                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
903                 atm_info(usbatm, "ADSL line: waiting\n");
904                 break;
905 
906         case 7:
907                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
908                 atm_info(usbatm, "ADSL line: initializing\n");
909                 break;
910 
911         default:
912                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_UNKNOWN);
913                 atm_info(usbatm, "Unknown line state %02x\n", instance->line_status);
914                 break;
915         }
916 reschedule:
917 
918         mutex_lock(&instance->poll_state_serialize);
919         if (instance->poll_state == CXPOLL_STOPPING &&
920                                 instance->adsl_status == 1 && /* stopped */
921                                 instance->line_status == 0) /* down */
922                 instance->poll_state = CXPOLL_STOPPED;
923 
924         if (instance->poll_state == CXPOLL_STOPPED)
925                 keep_polling = 0;
926         mutex_unlock(&instance->poll_state_serialize);
927 
928         if (keep_polling)
929                 schedule_delayed_work(&instance->poll_work,
930                                 round_jiffies_relative(POLL_INTERVAL*HZ));
931 }
932 
933 static int cxacru_fw(struct usb_device *usb_dev, enum cxacru_fw_request fw,
934                      u8 code1, u8 code2, u32 addr, const u8 *data, int size)
935 {
936         int ret;
937         u8 *buf;
938         int offd, offb;
939         const int stride = CMD_PACKET_SIZE - 8;
940 
941         buf = (u8 *) __get_free_page(GFP_KERNEL);
942         if (!buf)
943                 return -ENOMEM;
944 
945         offb = offd = 0;
946         do {
947                 int l = min_t(int, stride, size - offd);
948                 buf[offb++] = fw;
949                 buf[offb++] = l;
950                 buf[offb++] = code1;
951                 buf[offb++] = code2;
952                 put_unaligned(cpu_to_le32(addr), (__le32 *)(buf + offb));
953                 offb += 4;
954                 addr += l;
955                 if (l)
956                         memcpy(buf + offb, data + offd, l);
957                 if (l < stride)
958                         memset(buf + offb + l, 0, stride - l);
959                 offb += stride;
960                 offd += stride;
961                 if ((offb >= PAGE_SIZE) || (offd >= size)) {
962                         ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
963                                            buf, offb, NULL, CMD_TIMEOUT);
964                         if (ret < 0) {
965                                 dev_dbg(&usb_dev->dev, "sending fw %#x failed\n", fw);
966                                 goto cleanup;
967                         }
968                         offb = 0;
969                 }
970         } while (offd < size);
971         dev_dbg(&usb_dev->dev, "sent fw %#x\n", fw);
972 
973         ret = 0;
974 
975 cleanup:
976         free_page((unsigned long) buf);
977         return ret;
978 }
979 
980 static void cxacru_upload_firmware(struct cxacru_data *instance,
981                                    const struct firmware *fw,
982                                    const struct firmware *bp)
983 {
984         int ret;
985         struct usbatm_data *usbatm = instance->usbatm;
986         struct usb_device *usb_dev = usbatm->usb_dev;
987         __le16 signature[] = { usb_dev->descriptor.idVendor,
988                                usb_dev->descriptor.idProduct };
989         __le32 val;
990 
991         usb_dbg(usbatm, "%s\n", __func__);
992 
993         /* FirmwarePllFClkValue */
994         val = cpu_to_le32(instance->modem_type->pll_f_clk);
995         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLFCLK_ADDR, (u8 *) &val, 4);
996         if (ret) {
997                 usb_err(usbatm, "FirmwarePllFClkValue failed: %d\n", ret);
998                 return;
999         }
1000 
1001         /* FirmwarePllBClkValue */
1002         val = cpu_to_le32(instance->modem_type->pll_b_clk);
1003         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLBCLK_ADDR, (u8 *) &val, 4);
1004         if (ret) {
1005                 usb_err(usbatm, "FirmwarePllBClkValue failed: %d\n", ret);
1006                 return;
1007         }
1008 
1009         /* Enable SDRAM */
1010         val = cpu_to_le32(SDRAM_ENA);
1011         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SDRAMEN_ADDR, (u8 *) &val, 4);
1012         if (ret) {
1013                 usb_err(usbatm, "Enable SDRAM failed: %d\n", ret);
1014                 return;
1015         }
1016 
1017         /* Firmware */
1018         usb_info(usbatm, "loading firmware\n");
1019         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, FW_ADDR, fw->data, fw->size);
1020         if (ret) {
1021                 usb_err(usbatm, "Firmware upload failed: %d\n", ret);
1022                 return;
1023         }
1024 
1025         /* Boot ROM patch */
1026         if (instance->modem_type->boot_rom_patch) {
1027                 usb_info(usbatm, "loading boot ROM patch\n");
1028                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_ADDR, bp->data, bp->size);
1029                 if (ret) {
1030                         usb_err(usbatm, "Boot ROM patching failed: %d\n", ret);
1031                         return;
1032                 }
1033         }
1034 
1035         /* Signature */
1036         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SIG_ADDR, (u8 *) signature, 4);
1037         if (ret) {
1038                 usb_err(usbatm, "Signature storing failed: %d\n", ret);
1039                 return;
1040         }
1041 
1042         usb_info(usbatm, "starting device\n");
1043         if (instance->modem_type->boot_rom_patch) {
1044                 val = cpu_to_le32(BR_ADDR);
1045                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_STACK_ADDR, (u8 *) &val, 4);
1046         } else {
1047                 ret = cxacru_fw(usb_dev, FW_GOTO_MEM, 0x0, 0x0, FW_ADDR, NULL, 0);
1048         }
1049         if (ret) {
1050                 usb_err(usbatm, "Passing control to firmware failed: %d\n", ret);
1051                 return;
1052         }
1053 
1054         /* Delay to allow firmware to start up. */
1055         msleep_interruptible(1000);
1056 
1057         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD));
1058         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD));
1059         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_DATA));
1060         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_DATA));
1061 
1062         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
1063         if (ret < 0) {
1064                 usb_err(usbatm, "modem failed to initialize: %d\n", ret);
1065                 return;
1066         }
1067 }
1068 
1069 static int cxacru_find_firmware(struct cxacru_data *instance,
1070                                 char *phase, const struct firmware **fw_p)
1071 {
1072         struct usbatm_data *usbatm = instance->usbatm;
1073         struct device *dev = &usbatm->usb_intf->dev;
1074         char buf[16];
1075 
1076         sprintf(buf, "cxacru-%s.bin", phase);
1077         usb_dbg(usbatm, "cxacru_find_firmware: looking for %s\n", buf);
1078 
1079         if (request_firmware(fw_p, buf, dev)) {
1080                 usb_dbg(usbatm, "no stage %s firmware found\n", phase);
1081                 return -ENOENT;
1082         }
1083 
1084         usb_info(usbatm, "found firmware %s\n", buf);
1085 
1086         return 0;
1087 }
1088 
1089 static int cxacru_heavy_init(struct usbatm_data *usbatm_instance,
1090                              struct usb_interface *usb_intf)
1091 {
1092         const struct firmware *fw, *bp;
1093         struct cxacru_data *instance = usbatm_instance->driver_data;
1094 
1095         int ret = cxacru_find_firmware(instance, "fw", &fw);
1096         if (ret) {
1097                 usb_warn(usbatm_instance, "firmware (cxacru-fw.bin) unavailable (system misconfigured?)\n");
1098                 return ret;
1099         }
1100 
1101         if (instance->modem_type->boot_rom_patch) {
1102                 ret = cxacru_find_firmware(instance, "bp", &bp);
1103                 if (ret) {
1104                         usb_warn(usbatm_instance, "boot ROM patch (cxacru-bp.bin) unavailable (system misconfigured?)\n");
1105                         release_firmware(fw);
1106                         return ret;
1107                 }
1108         }
1109 
1110         cxacru_upload_firmware(instance, fw, bp);
1111 
1112         if (instance->modem_type->boot_rom_patch)
1113                 release_firmware(bp);
1114         release_firmware(fw);
1115 
1116         ret = cxacru_card_status(instance);
1117         if (ret)
1118                 usb_dbg(usbatm_instance, "modem initialisation failed\n");
1119         else
1120                 usb_dbg(usbatm_instance, "done setting up the modem\n");
1121 
1122         return ret;
1123 }
1124 
1125 static int cxacru_bind(struct usbatm_data *usbatm_instance,
1126                        struct usb_interface *intf, const struct usb_device_id *id)
1127 {
1128         struct cxacru_data *instance;
1129         struct usb_device *usb_dev = interface_to_usbdev(intf);
1130         struct usb_host_endpoint *cmd_ep = usb_dev->ep_in[CXACRU_EP_CMD];
1131         int ret;
1132 
1133         /* instance init */
1134         instance = kzalloc(sizeof(*instance), GFP_KERNEL);
1135         if (!instance) {
1136                 usb_dbg(usbatm_instance, "cxacru_bind: no memory for instance data\n");
1137                 return -ENOMEM;
1138         }
1139 
1140         instance->usbatm = usbatm_instance;
1141         instance->modem_type = (struct cxacru_modem_type *) id->driver_info;
1142 
1143         mutex_init(&instance->poll_state_serialize);
1144         instance->poll_state = CXPOLL_STOPPED;
1145         instance->line_status = -1;
1146         instance->adsl_status = -1;
1147 
1148         mutex_init(&instance->adsl_state_serialize);
1149 
1150         instance->rcv_buf = (u8 *) __get_free_page(GFP_KERNEL);
1151         if (!instance->rcv_buf) {
1152                 usb_dbg(usbatm_instance, "cxacru_bind: no memory for rcv_buf\n");
1153                 ret = -ENOMEM;
1154                 goto fail;
1155         }
1156         instance->snd_buf = (u8 *) __get_free_page(GFP_KERNEL);
1157         if (!instance->snd_buf) {
1158                 usb_dbg(usbatm_instance, "cxacru_bind: no memory for snd_buf\n");
1159                 ret = -ENOMEM;
1160                 goto fail;
1161         }
1162         instance->rcv_urb = usb_alloc_urb(0, GFP_KERNEL);
1163         if (!instance->rcv_urb) {
1164                 usb_dbg(usbatm_instance, "cxacru_bind: no memory for rcv_urb\n");
1165                 ret = -ENOMEM;
1166                 goto fail;
1167         }
1168         instance->snd_urb = usb_alloc_urb(0, GFP_KERNEL);
1169         if (!instance->snd_urb) {
1170                 usb_dbg(usbatm_instance, "cxacru_bind: no memory for snd_urb\n");
1171                 ret = -ENOMEM;
1172                 goto fail;
1173         }
1174 
1175         if (!cmd_ep) {
1176                 usb_dbg(usbatm_instance, "cxacru_bind: no command endpoint\n");
1177                 ret = -ENODEV;
1178                 goto fail;
1179         }
1180 
1181         if ((cmd_ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1182                         == USB_ENDPOINT_XFER_INT) {
1183                 usb_fill_int_urb(instance->rcv_urb,
1184                         usb_dev, usb_rcvintpipe(usb_dev, CXACRU_EP_CMD),
1185                         instance->rcv_buf, PAGE_SIZE,
1186                         cxacru_blocking_completion, &instance->rcv_done, 1);
1187 
1188                 usb_fill_int_urb(instance->snd_urb,
1189                         usb_dev, usb_sndintpipe(usb_dev, CXACRU_EP_CMD),
1190                         instance->snd_buf, PAGE_SIZE,
1191                         cxacru_blocking_completion, &instance->snd_done, 4);
1192         } else {
1193                 usb_fill_bulk_urb(instance->rcv_urb,
1194                         usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD),
1195                         instance->rcv_buf, PAGE_SIZE,
1196                         cxacru_blocking_completion, &instance->rcv_done);
1197 
1198                 usb_fill_bulk_urb(instance->snd_urb,
1199                         usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
1200                         instance->snd_buf, PAGE_SIZE,
1201                         cxacru_blocking_completion, &instance->snd_done);
1202         }
1203 
1204         mutex_init(&instance->cm_serialize);
1205 
1206         INIT_DELAYED_WORK(&instance->poll_work, cxacru_poll_status);
1207 
1208         usbatm_instance->driver_data = instance;
1209 
1210         usbatm_instance->flags = (cxacru_card_status(instance) ? 0 : UDSL_SKIP_HEAVY_INIT);
1211 
1212         return 0;
1213 
1214  fail:
1215         free_page((unsigned long) instance->snd_buf);
1216         free_page((unsigned long) instance->rcv_buf);
1217         usb_free_urb(instance->snd_urb);
1218         usb_free_urb(instance->rcv_urb);
1219         kfree(instance);
1220 
1221         return ret;
1222 }
1223 
1224 static void cxacru_unbind(struct usbatm_data *usbatm_instance,
1225                 struct usb_interface *intf)
1226 {
1227         struct cxacru_data *instance = usbatm_instance->driver_data;
1228         int is_polling = 1;
1229 
1230         usb_dbg(usbatm_instance, "cxacru_unbind entered\n");
1231 
1232         if (!instance) {
1233                 usb_dbg(usbatm_instance, "cxacru_unbind: NULL instance!\n");
1234                 return;
1235         }
1236 
1237         mutex_lock(&instance->poll_state_serialize);
1238         BUG_ON(instance->poll_state == CXPOLL_SHUTDOWN);
1239 
1240         /* ensure that status polling continues unless
1241          * it has already stopped */
1242         if (instance->poll_state == CXPOLL_STOPPED)
1243                 is_polling = 0;
1244 
1245         /* stop polling from being stopped or started */
1246         instance->poll_state = CXPOLL_SHUTDOWN;
1247         mutex_unlock(&instance->poll_state_serialize);
1248 
1249         if (is_polling)
1250                 cancel_delayed_work_sync(&instance->poll_work);
1251 
1252         usb_kill_urb(instance->snd_urb);
1253         usb_kill_urb(instance->rcv_urb);
1254         usb_free_urb(instance->snd_urb);
1255         usb_free_urb(instance->rcv_urb);
1256 
1257         free_page((unsigned long) instance->snd_buf);
1258         free_page((unsigned long) instance->rcv_buf);
1259 
1260         kfree(instance);
1261 
1262         usbatm_instance->driver_data = NULL;
1263 }
1264 
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         .atm_stop       = cxacru_remove_device_files,
1341         .bulk_in        = CXACRU_EP_DATA,
1342         .bulk_out       = CXACRU_EP_DATA,
1343         .rx_padding     = 3,
1344         .tx_padding     = 11,
1345 };
1346 
1347 static int cxacru_usb_probe(struct usb_interface *intf,
1348                 const struct usb_device_id *id)
1349 {
1350         struct usb_device *usb_dev = interface_to_usbdev(intf);
1351         char buf[15];
1352 
1353         /* Avoid ADSL routers (cx82310_eth).
1354          * Abort if bDeviceClass is 0xff and iProduct is "USB NET CARD".
1355          */
1356         if (usb_dev->descriptor.bDeviceClass == USB_CLASS_VENDOR_SPEC
1357                         && usb_string(usb_dev, usb_dev->descriptor.iProduct,
1358                                 buf, sizeof(buf)) > 0) {
1359                 if (!strcmp(buf, "USB NET CARD")) {
1360                         dev_info(&intf->dev, "ignoring cx82310_eth device\n");
1361                         return -ENODEV;
1362                 }
1363         }
1364 
1365         return usbatm_usb_probe(intf, id, &cxacru_driver);
1366 }
1367 
1368 static struct usb_driver cxacru_usb_driver = {
1369         .name           = cxacru_driver_name,
1370         .probe          = cxacru_usb_probe,
1371         .disconnect     = usbatm_usb_disconnect,
1372         .id_table       = cxacru_usb_ids
1373 };
1374 
1375 module_usb_driver(cxacru_usb_driver);
1376 
1377 MODULE_AUTHOR(DRIVER_AUTHOR);
1378 MODULE_DESCRIPTION(DRIVER_DESC);
1379 MODULE_LICENSE("GPL");
1380 MODULE_VERSION(DRIVER_VERSION);
1381 

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