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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 
cxacru_sysfs_showattr_u32(u32 value,char * buf)248 static ssize_t cxacru_sysfs_showattr_u32(u32 value, char *buf)
249 {
250 	return snprintf(buf, PAGE_SIZE, "%u\n", value);
251 }
252 
cxacru_sysfs_showattr_s8(s8 value,char * buf)253 static ssize_t cxacru_sysfs_showattr_s8(s8 value, char *buf)
254 {
255 	return snprintf(buf, PAGE_SIZE, "%d\n", value);
256 }
257 
cxacru_sysfs_showattr_dB(s16 value,char * buf)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 
cxacru_sysfs_showattr_bool(u32 value,char * buf)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 
cxacru_sysfs_showattr_LINK(u32 value,char * buf)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 
cxacru_sysfs_showattr_LINE(u32 value,char * buf)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 
cxacru_sysfs_showattr_MODU(u32 value,char * buf)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  */
cxacru_sysfs_show_mac_address(struct device * dev,struct device_attribute * attr,char * buf)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 
cxacru_sysfs_show_adsl_state(struct device * dev,struct device_attribute * attr,char * buf)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 
cxacru_sysfs_store_adsl_state(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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 
cxacru_sysfs_store_adsl_config(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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 		if (tmp < 0 || tmp > len - pos)
480 			return -EINVAL;
481 		pos += tmp;
482 
483 		/* skip trailing newline */
484 		if (buf[pos] == '\n' && pos == len-1)
485 			pos++;
486 
487 		data[num * 2 + 1] = cpu_to_le32(index);
488 		data[num * 2 + 2] = cpu_to_le32(value);
489 		num++;
490 
491 		/* send config values when data buffer is full
492 		 * or no more data
493 		 */
494 		if (pos >= len || num >= CMD_MAX_CONFIG) {
495 			char log[CMD_MAX_CONFIG * 12 + 1]; /* %02x=%08x */
496 
497 			data[0] = cpu_to_le32(num);
498 			ret = cxacru_cm(instance, CM_REQUEST_CARD_DATA_SET,
499 				(u8 *) data, 4 + num * 8, NULL, 0);
500 			if (ret < 0) {
501 				atm_err(instance->usbatm,
502 					"set card data returned %d\n", ret);
503 				return -EIO;
504 			}
505 
506 			for (tmp = 0; tmp < num; tmp++)
507 				snprintf(log + tmp*12, 13, " %02x=%08x",
508 					le32_to_cpu(data[tmp * 2 + 1]),
509 					le32_to_cpu(data[tmp * 2 + 2]));
510 			atm_info(instance->usbatm, "config%s\n", log);
511 			num = 0;
512 		}
513 	}
514 
515 	return len;
516 }
517 
518 /*
519  * All device attributes are included in CXACRU_ALL_FILES
520  * so that the same list can be used multiple times:
521  *     INIT   (define the device attributes)
522  *     CREATE (create all the device files)
523  *     REMOVE (remove all the device files)
524  *
525  * With the last two being defined as needed in the functions
526  * they are used in before calling CXACRU_ALL_FILES()
527  */
528 #define CXACRU_ALL_FILES(_action) \
529 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_RATE,           u32,  downstream_rate); \
530 CXACRU_ATTR_##_action(CXINF_UPSTREAM_RATE,             u32,  upstream_rate); \
531 CXACRU_ATTR_##_action(CXINF_LINK_STATUS,               LINK, link_status); \
532 CXACRU_ATTR_##_action(CXINF_LINE_STATUS,               LINE, line_status); \
533 CXACRU__ATTR_##_action(                                      mac_address); \
534 CXACRU_ATTR_##_action(CXINF_UPSTREAM_SNR_MARGIN,       dB,   upstream_snr_margin); \
535 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_SNR_MARGIN,     dB,   downstream_snr_margin); \
536 CXACRU_ATTR_##_action(CXINF_UPSTREAM_ATTENUATION,      dB,   upstream_attenuation); \
537 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_ATTENUATION,    dB,   downstream_attenuation); \
538 CXACRU_ATTR_##_action(CXINF_TRANSMITTER_POWER,         s8,   transmitter_power); \
539 CXACRU_ATTR_##_action(CXINF_UPSTREAM_BITS_PER_FRAME,   u32,  upstream_bits_per_frame); \
540 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_BITS_PER_FRAME, u32,  downstream_bits_per_frame); \
541 CXACRU_ATTR_##_action(CXINF_STARTUP_ATTEMPTS,          u32,  startup_attempts); \
542 CXACRU_ATTR_##_action(CXINF_UPSTREAM_CRC_ERRORS,       u32,  upstream_crc_errors); \
543 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_CRC_ERRORS,     u32,  downstream_crc_errors); \
544 CXACRU_ATTR_##_action(CXINF_UPSTREAM_FEC_ERRORS,       u32,  upstream_fec_errors); \
545 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_FEC_ERRORS,     u32,  downstream_fec_errors); \
546 CXACRU_ATTR_##_action(CXINF_UPSTREAM_HEC_ERRORS,       u32,  upstream_hec_errors); \
547 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_HEC_ERRORS,     u32,  downstream_hec_errors); \
548 CXACRU_ATTR_##_action(CXINF_LINE_STARTABLE,            bool, line_startable); \
549 CXACRU_ATTR_##_action(CXINF_MODULATION,                MODU, modulation); \
550 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND,              u32,  adsl_headend); \
551 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND_ENVIRONMENT,  u32,  adsl_headend_environment); \
552 CXACRU_ATTR_##_action(CXINF_CONTROLLER_VERSION,        u32,  adsl_controller_version); \
553 CXACRU_CMD_##_action(                                        adsl_state); \
554 CXACRU_SET_##_action(                                        adsl_config);
555 
556 CXACRU_ALL_FILES(INIT);
557 
558 /* the following three functions are stolen from drivers/usb/core/message.c */
cxacru_blocking_completion(struct urb * urb)559 static void cxacru_blocking_completion(struct urb *urb)
560 {
561 	complete(urb->context);
562 }
563 
cxacru_timeout_kill(unsigned long data)564 static void cxacru_timeout_kill(unsigned long data)
565 {
566 	usb_unlink_urb((struct urb *) data);
567 }
568 
cxacru_start_wait_urb(struct urb * urb,struct completion * done,int * actual_length)569 static int cxacru_start_wait_urb(struct urb *urb, struct completion *done,
570 				 int *actual_length)
571 {
572 	struct timer_list timer;
573 
574 	init_timer(&timer);
575 	timer.expires = jiffies + msecs_to_jiffies(CMD_TIMEOUT);
576 	timer.data = (unsigned long) urb;
577 	timer.function = cxacru_timeout_kill;
578 	add_timer(&timer);
579 	wait_for_completion(done);
580 	del_timer_sync(&timer);
581 
582 	if (actual_length)
583 		*actual_length = urb->actual_length;
584 	return urb->status; /* must read status after completion */
585 }
586 
cxacru_cm(struct cxacru_data * instance,enum cxacru_cm_request cm,u8 * wdata,int wsize,u8 * rdata,int rsize)587 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
588 		     u8 *wdata, int wsize, u8 *rdata, int rsize)
589 {
590 	int ret, actlen;
591 	int offb, offd;
592 	const int stride = CMD_PACKET_SIZE - 4;
593 	u8 *wbuf = instance->snd_buf;
594 	u8 *rbuf = instance->rcv_buf;
595 	int wbuflen = ((wsize - 1) / stride + 1) * CMD_PACKET_SIZE;
596 	int rbuflen = ((rsize - 1) / stride + 1) * CMD_PACKET_SIZE;
597 
598 	if (wbuflen > PAGE_SIZE || rbuflen > PAGE_SIZE) {
599 		if (printk_ratelimit())
600 			usb_err(instance->usbatm, "requested transfer size too large (%d, %d)\n",
601 				wbuflen, rbuflen);
602 		ret = -ENOMEM;
603 		goto err;
604 	}
605 
606 	mutex_lock(&instance->cm_serialize);
607 
608 	/* submit reading urb before the writing one */
609 	init_completion(&instance->rcv_done);
610 	ret = usb_submit_urb(instance->rcv_urb, GFP_KERNEL);
611 	if (ret < 0) {
612 		if (printk_ratelimit())
613 			usb_err(instance->usbatm, "submit of read urb for cm %#x failed (%d)\n",
614 				cm, ret);
615 		goto fail;
616 	}
617 
618 	memset(wbuf, 0, wbuflen);
619 	/* handle wsize == 0 */
620 	wbuf[0] = cm;
621 	for (offb = offd = 0; offd < wsize; offd += stride, offb += CMD_PACKET_SIZE) {
622 		wbuf[offb] = cm;
623 		memcpy(wbuf + offb + 4, wdata + offd, min_t(int, stride, wsize - offd));
624 	}
625 
626 	instance->snd_urb->transfer_buffer_length = wbuflen;
627 	init_completion(&instance->snd_done);
628 	ret = usb_submit_urb(instance->snd_urb, GFP_KERNEL);
629 	if (ret < 0) {
630 		if (printk_ratelimit())
631 			usb_err(instance->usbatm, "submit of write urb for cm %#x failed (%d)\n",
632 				cm, ret);
633 		goto fail;
634 	}
635 
636 	ret = cxacru_start_wait_urb(instance->snd_urb, &instance->snd_done, NULL);
637 	if (ret < 0) {
638 		if (printk_ratelimit())
639 			usb_err(instance->usbatm, "send of cm %#x failed (%d)\n", cm, ret);
640 		goto fail;
641 	}
642 
643 	ret = cxacru_start_wait_urb(instance->rcv_urb, &instance->rcv_done, &actlen);
644 	if (ret < 0) {
645 		if (printk_ratelimit())
646 			usb_err(instance->usbatm, "receive of cm %#x failed (%d)\n", cm, ret);
647 		goto fail;
648 	}
649 	if (actlen % CMD_PACKET_SIZE || !actlen) {
650 		if (printk_ratelimit())
651 			usb_err(instance->usbatm, "invalid response length to cm %#x: %d\n",
652 				cm, actlen);
653 		ret = -EIO;
654 		goto fail;
655 	}
656 
657 	/* check the return status and copy the data to the output buffer, if needed */
658 	for (offb = offd = 0; offd < rsize && offb < actlen; offb += CMD_PACKET_SIZE) {
659 		if (rbuf[offb] != cm) {
660 			if (printk_ratelimit())
661 				usb_err(instance->usbatm, "wrong cm %#x in response to cm %#x\n",
662 					rbuf[offb], cm);
663 			ret = -EIO;
664 			goto fail;
665 		}
666 		if (rbuf[offb + 1] != CM_STATUS_SUCCESS) {
667 			if (printk_ratelimit())
668 				usb_err(instance->usbatm, "response to cm %#x failed: %#x\n",
669 					cm, rbuf[offb + 1]);
670 			ret = -EIO;
671 			goto fail;
672 		}
673 		if (offd >= rsize)
674 			break;
675 		memcpy(rdata + offd, rbuf + offb + 4, min_t(int, stride, rsize - offd));
676 		offd += stride;
677 	}
678 
679 	ret = offd;
680 	usb_dbg(instance->usbatm, "cm %#x\n", cm);
681 fail:
682 	mutex_unlock(&instance->cm_serialize);
683 err:
684 	return ret;
685 }
686 
cxacru_cm_get_array(struct cxacru_data * instance,enum cxacru_cm_request cm,u32 * data,int size)687 static int cxacru_cm_get_array(struct cxacru_data *instance, enum cxacru_cm_request cm,
688 			       u32 *data, int size)
689 {
690 	int ret, len;
691 	__le32 *buf;
692 	int offb;
693 	unsigned int offd;
694 	const int stride = CMD_PACKET_SIZE / (4 * 2) - 1;
695 	int buflen =  ((size - 1) / stride + 1 + size * 2) * 4;
696 
697 	buf = kmalloc(buflen, GFP_KERNEL);
698 	if (!buf)
699 		return -ENOMEM;
700 
701 	ret = cxacru_cm(instance, cm, NULL, 0, (u8 *) buf, buflen);
702 	if (ret < 0)
703 		goto cleanup;
704 
705 	/* len > 0 && len % 4 == 0 guaranteed by cxacru_cm() */
706 	len = ret / 4;
707 	for (offb = 0; offb < len; ) {
708 		int l = le32_to_cpu(buf[offb++]);
709 
710 		if (l < 0 || l > stride || l > (len - offb) / 2) {
711 			if (printk_ratelimit())
712 				usb_err(instance->usbatm, "invalid data length from cm %#x: %d\n",
713 					cm, l);
714 			ret = -EIO;
715 			goto cleanup;
716 		}
717 		while (l--) {
718 			offd = le32_to_cpu(buf[offb++]);
719 			if (offd >= size) {
720 				if (printk_ratelimit())
721 					usb_err(instance->usbatm, "wrong index %#x in response to cm %#x\n",
722 						offd, cm);
723 				ret = -EIO;
724 				goto cleanup;
725 			}
726 			data[offd] = le32_to_cpu(buf[offb++]);
727 		}
728 	}
729 
730 	ret = 0;
731 
732 cleanup:
733 	kfree(buf);
734 	return ret;
735 }
736 
cxacru_card_status(struct cxacru_data * instance)737 static int cxacru_card_status(struct cxacru_data *instance)
738 {
739 	int ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
740 
741 	if (ret < 0) {		/* firmware not loaded */
742 		usb_dbg(instance->usbatm, "cxacru_adsl_start: CARD_GET_STATUS returned %d\n", ret);
743 		return ret;
744 	}
745 	return 0;
746 }
747 
cxacru_remove_device_files(struct usbatm_data * usbatm_instance,struct atm_dev * atm_dev)748 static void cxacru_remove_device_files(struct usbatm_data *usbatm_instance,
749 		struct atm_dev *atm_dev)
750 {
751 	struct usb_interface *intf = usbatm_instance->usb_intf;
752 
753 	#define CXACRU_DEVICE_REMOVE_FILE(_name) \
754 		device_remove_file(&intf->dev, &dev_attr_##_name);
755 	CXACRU_ALL_FILES(REMOVE);
756 	#undef CXACRU_DEVICE_REMOVE_FILE
757 }
758 
cxacru_atm_start(struct usbatm_data * usbatm_instance,struct atm_dev * atm_dev)759 static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
760 		struct atm_dev *atm_dev)
761 {
762 	struct cxacru_data *instance = usbatm_instance->driver_data;
763 	struct usb_interface *intf = usbatm_instance->usb_intf;
764 	int ret;
765 	int start_polling = 1;
766 
767 	dev_dbg(&intf->dev, "%s\n", __func__);
768 
769 	/* Read MAC address */
770 	ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_MAC_ADDRESS, NULL, 0,
771 			atm_dev->esi, sizeof(atm_dev->esi));
772 	if (ret < 0) {
773 		atm_err(usbatm_instance, "cxacru_atm_start: CARD_GET_MAC_ADDRESS returned %d\n", ret);
774 		return ret;
775 	}
776 
777 	#define CXACRU_DEVICE_CREATE_FILE(_name) \
778 		ret = device_create_file(&intf->dev, &dev_attr_##_name); \
779 		if (unlikely(ret)) \
780 			goto fail_sysfs;
781 	CXACRU_ALL_FILES(CREATE);
782 	#undef CXACRU_DEVICE_CREATE_FILE
783 
784 	/* start ADSL */
785 	mutex_lock(&instance->adsl_state_serialize);
786 	ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
787 	if (ret < 0)
788 		atm_err(usbatm_instance, "cxacru_atm_start: CHIP_ADSL_LINE_START returned %d\n", ret);
789 
790 	/* Start status polling */
791 	mutex_lock(&instance->poll_state_serialize);
792 	switch (instance->poll_state) {
793 	case CXPOLL_STOPPED:
794 		/* start polling */
795 		instance->poll_state = CXPOLL_POLLING;
796 		break;
797 
798 	case CXPOLL_STOPPING:
799 		/* abort stop request */
800 		instance->poll_state = CXPOLL_POLLING;
801 	case CXPOLL_POLLING:
802 	case CXPOLL_SHUTDOWN:
803 		/* don't start polling */
804 		start_polling = 0;
805 	}
806 	mutex_unlock(&instance->poll_state_serialize);
807 	mutex_unlock(&instance->adsl_state_serialize);
808 
809 	printk(KERN_INFO "%s%d: %s %pM\n", atm_dev->type, atm_dev->number,
810 			usbatm_instance->description, atm_dev->esi);
811 
812 	if (start_polling)
813 		cxacru_poll_status(&instance->poll_work.work);
814 	return 0;
815 
816 fail_sysfs:
817 	usb_err(usbatm_instance, "cxacru_atm_start: device_create_file failed (%d)\n", ret);
818 	cxacru_remove_device_files(usbatm_instance, atm_dev);
819 	return ret;
820 }
821 
cxacru_poll_status(struct work_struct * work)822 static void cxacru_poll_status(struct work_struct *work)
823 {
824 	struct cxacru_data *instance =
825 		container_of(work, struct cxacru_data, poll_work.work);
826 	u32 buf[CXINF_MAX] = {};
827 	struct usbatm_data *usbatm = instance->usbatm;
828 	struct atm_dev *atm_dev = usbatm->atm_dev;
829 	int keep_polling = 1;
830 	int ret;
831 
832 	ret = cxacru_cm_get_array(instance, CM_REQUEST_CARD_INFO_GET, buf, CXINF_MAX);
833 	if (ret < 0) {
834 		if (ret != -ESHUTDOWN)
835 			atm_warn(usbatm, "poll status: error %d\n", ret);
836 
837 		mutex_lock(&instance->poll_state_serialize);
838 		if (instance->poll_state != CXPOLL_SHUTDOWN) {
839 			instance->poll_state = CXPOLL_STOPPED;
840 
841 			if (ret != -ESHUTDOWN)
842 				atm_warn(usbatm, "polling disabled, set adsl_state"
843 						" to 'start' or 'poll' to resume\n");
844 		}
845 		mutex_unlock(&instance->poll_state_serialize);
846 		goto reschedule;
847 	}
848 
849 	memcpy(instance->card_info, buf, sizeof(instance->card_info));
850 
851 	if (instance->adsl_status != buf[CXINF_LINE_STARTABLE]) {
852 		instance->adsl_status = buf[CXINF_LINE_STARTABLE];
853 
854 		switch (instance->adsl_status) {
855 		case 0:
856 			atm_printk(KERN_INFO, usbatm, "ADSL state: running\n");
857 			break;
858 
859 		case 1:
860 			atm_printk(KERN_INFO, usbatm, "ADSL state: stopped\n");
861 			break;
862 
863 		default:
864 			atm_printk(KERN_INFO, usbatm, "Unknown adsl status %02x\n", instance->adsl_status);
865 			break;
866 		}
867 	}
868 
869 	if (instance->line_status == buf[CXINF_LINE_STATUS])
870 		goto reschedule;
871 
872 	instance->line_status = buf[CXINF_LINE_STATUS];
873 	switch (instance->line_status) {
874 	case 0:
875 		atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
876 		atm_info(usbatm, "ADSL line: down\n");
877 		break;
878 
879 	case 1:
880 		atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
881 		atm_info(usbatm, "ADSL line: attempting to activate\n");
882 		break;
883 
884 	case 2:
885 		atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
886 		atm_info(usbatm, "ADSL line: training\n");
887 		break;
888 
889 	case 3:
890 		atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
891 		atm_info(usbatm, "ADSL line: channel analysis\n");
892 		break;
893 
894 	case 4:
895 		atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
896 		atm_info(usbatm, "ADSL line: exchange\n");
897 		break;
898 
899 	case 5:
900 		atm_dev->link_rate = buf[CXINF_DOWNSTREAM_RATE] * 1000 / 424;
901 		atm_dev_signal_change(atm_dev, ATM_PHY_SIG_FOUND);
902 
903 		atm_info(usbatm, "ADSL line: up (%d kb/s down | %d kb/s up)\n",
904 		     buf[CXINF_DOWNSTREAM_RATE], buf[CXINF_UPSTREAM_RATE]);
905 		break;
906 
907 	case 6:
908 		atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
909 		atm_info(usbatm, "ADSL line: waiting\n");
910 		break;
911 
912 	case 7:
913 		atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
914 		atm_info(usbatm, "ADSL line: initializing\n");
915 		break;
916 
917 	default:
918 		atm_dev_signal_change(atm_dev, ATM_PHY_SIG_UNKNOWN);
919 		atm_info(usbatm, "Unknown line state %02x\n", instance->line_status);
920 		break;
921 	}
922 reschedule:
923 
924 	mutex_lock(&instance->poll_state_serialize);
925 	if (instance->poll_state == CXPOLL_STOPPING &&
926 				instance->adsl_status == 1 && /* stopped */
927 				instance->line_status == 0) /* down */
928 		instance->poll_state = CXPOLL_STOPPED;
929 
930 	if (instance->poll_state == CXPOLL_STOPPED)
931 		keep_polling = 0;
932 	mutex_unlock(&instance->poll_state_serialize);
933 
934 	if (keep_polling)
935 		schedule_delayed_work(&instance->poll_work,
936 				round_jiffies_relative(POLL_INTERVAL*HZ));
937 }
938 
cxacru_fw(struct usb_device * usb_dev,enum cxacru_fw_request fw,u8 code1,u8 code2,u32 addr,const u8 * data,int size)939 static int cxacru_fw(struct usb_device *usb_dev, enum cxacru_fw_request fw,
940 		     u8 code1, u8 code2, u32 addr, const u8 *data, int size)
941 {
942 	int ret;
943 	u8 *buf;
944 	int offd, offb;
945 	const int stride = CMD_PACKET_SIZE - 8;
946 
947 	buf = (u8 *) __get_free_page(GFP_KERNEL);
948 	if (!buf)
949 		return -ENOMEM;
950 
951 	offb = offd = 0;
952 	do {
953 		int l = min_t(int, stride, size - offd);
954 
955 		buf[offb++] = fw;
956 		buf[offb++] = l;
957 		buf[offb++] = code1;
958 		buf[offb++] = code2;
959 		put_unaligned(cpu_to_le32(addr), (__le32 *)(buf + offb));
960 		offb += 4;
961 		addr += l;
962 		if (l)
963 			memcpy(buf + offb, data + offd, l);
964 		if (l < stride)
965 			memset(buf + offb + l, 0, stride - l);
966 		offb += stride;
967 		offd += stride;
968 		if ((offb >= PAGE_SIZE) || (offd >= size)) {
969 			ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
970 					   buf, offb, NULL, CMD_TIMEOUT);
971 			if (ret < 0) {
972 				dev_dbg(&usb_dev->dev, "sending fw %#x failed\n", fw);
973 				goto cleanup;
974 			}
975 			offb = 0;
976 		}
977 	} while (offd < size);
978 	dev_dbg(&usb_dev->dev, "sent fw %#x\n", fw);
979 
980 	ret = 0;
981 
982 cleanup:
983 	free_page((unsigned long) buf);
984 	return ret;
985 }
986 
cxacru_upload_firmware(struct cxacru_data * instance,const struct firmware * fw,const struct firmware * bp)987 static void cxacru_upload_firmware(struct cxacru_data *instance,
988 				   const struct firmware *fw,
989 				   const struct firmware *bp)
990 {
991 	int ret;
992 	struct usbatm_data *usbatm = instance->usbatm;
993 	struct usb_device *usb_dev = usbatm->usb_dev;
994 	__le16 signature[] = { usb_dev->descriptor.idVendor,
995 			       usb_dev->descriptor.idProduct };
996 	__le32 val;
997 
998 	usb_dbg(usbatm, "%s\n", __func__);
999 
1000 	/* FirmwarePllFClkValue */
1001 	val = cpu_to_le32(instance->modem_type->pll_f_clk);
1002 	ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLFCLK_ADDR, (u8 *) &val, 4);
1003 	if (ret) {
1004 		usb_err(usbatm, "FirmwarePllFClkValue failed: %d\n", ret);
1005 		return;
1006 	}
1007 
1008 	/* FirmwarePllBClkValue */
1009 	val = cpu_to_le32(instance->modem_type->pll_b_clk);
1010 	ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLBCLK_ADDR, (u8 *) &val, 4);
1011 	if (ret) {
1012 		usb_err(usbatm, "FirmwarePllBClkValue failed: %d\n", ret);
1013 		return;
1014 	}
1015 
1016 	/* Enable SDRAM */
1017 	val = cpu_to_le32(SDRAM_ENA);
1018 	ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SDRAMEN_ADDR, (u8 *) &val, 4);
1019 	if (ret) {
1020 		usb_err(usbatm, "Enable SDRAM failed: %d\n", ret);
1021 		return;
1022 	}
1023 
1024 	/* Firmware */
1025 	usb_info(usbatm, "loading firmware\n");
1026 	ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, FW_ADDR, fw->data, fw->size);
1027 	if (ret) {
1028 		usb_err(usbatm, "Firmware upload failed: %d\n", ret);
1029 		return;
1030 	}
1031 
1032 	/* Boot ROM patch */
1033 	if (instance->modem_type->boot_rom_patch) {
1034 		usb_info(usbatm, "loading boot ROM patch\n");
1035 		ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_ADDR, bp->data, bp->size);
1036 		if (ret) {
1037 			usb_err(usbatm, "Boot ROM patching failed: %d\n", ret);
1038 			return;
1039 		}
1040 	}
1041 
1042 	/* Signature */
1043 	ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SIG_ADDR, (u8 *) signature, 4);
1044 	if (ret) {
1045 		usb_err(usbatm, "Signature storing failed: %d\n", ret);
1046 		return;
1047 	}
1048 
1049 	usb_info(usbatm, "starting device\n");
1050 	if (instance->modem_type->boot_rom_patch) {
1051 		val = cpu_to_le32(BR_ADDR);
1052 		ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_STACK_ADDR, (u8 *) &val, 4);
1053 	} else {
1054 		ret = cxacru_fw(usb_dev, FW_GOTO_MEM, 0x0, 0x0, FW_ADDR, NULL, 0);
1055 	}
1056 	if (ret) {
1057 		usb_err(usbatm, "Passing control to firmware failed: %d\n", ret);
1058 		return;
1059 	}
1060 
1061 	/* Delay to allow firmware to start up. */
1062 	msleep_interruptible(1000);
1063 
1064 	usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD));
1065 	usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD));
1066 	usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_DATA));
1067 	usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_DATA));
1068 
1069 	ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
1070 	if (ret < 0) {
1071 		usb_err(usbatm, "modem failed to initialize: %d\n", ret);
1072 		return;
1073 	}
1074 }
1075 
cxacru_find_firmware(struct cxacru_data * instance,char * phase,const struct firmware ** fw_p)1076 static int cxacru_find_firmware(struct cxacru_data *instance,
1077 				char *phase, const struct firmware **fw_p)
1078 {
1079 	struct usbatm_data *usbatm = instance->usbatm;
1080 	struct device *dev = &usbatm->usb_intf->dev;
1081 	char buf[16];
1082 
1083 	sprintf(buf, "cxacru-%s.bin", phase);
1084 	usb_dbg(usbatm, "cxacru_find_firmware: looking for %s\n", buf);
1085 
1086 	if (request_firmware(fw_p, buf, dev)) {
1087 		usb_dbg(usbatm, "no stage %s firmware found\n", phase);
1088 		return -ENOENT;
1089 	}
1090 
1091 	usb_info(usbatm, "found firmware %s\n", buf);
1092 
1093 	return 0;
1094 }
1095 
cxacru_heavy_init(struct usbatm_data * usbatm_instance,struct usb_interface * usb_intf)1096 static int cxacru_heavy_init(struct usbatm_data *usbatm_instance,
1097 			     struct usb_interface *usb_intf)
1098 {
1099 	const struct firmware *fw, *bp;
1100 	struct cxacru_data *instance = usbatm_instance->driver_data;
1101 	int ret = cxacru_find_firmware(instance, "fw", &fw);
1102 
1103 	if (ret) {
1104 		usb_warn(usbatm_instance, "firmware (cxacru-fw.bin) unavailable (system misconfigured?)\n");
1105 		return ret;
1106 	}
1107 
1108 	if (instance->modem_type->boot_rom_patch) {
1109 		ret = cxacru_find_firmware(instance, "bp", &bp);
1110 		if (ret) {
1111 			usb_warn(usbatm_instance, "boot ROM patch (cxacru-bp.bin) unavailable (system misconfigured?)\n");
1112 			release_firmware(fw);
1113 			return ret;
1114 		}
1115 	}
1116 
1117 	cxacru_upload_firmware(instance, fw, bp);
1118 
1119 	if (instance->modem_type->boot_rom_patch)
1120 		release_firmware(bp);
1121 	release_firmware(fw);
1122 
1123 	ret = cxacru_card_status(instance);
1124 	if (ret)
1125 		usb_dbg(usbatm_instance, "modem initialisation failed\n");
1126 	else
1127 		usb_dbg(usbatm_instance, "done setting up the modem\n");
1128 
1129 	return ret;
1130 }
1131 
cxacru_bind(struct usbatm_data * usbatm_instance,struct usb_interface * intf,const struct usb_device_id * id)1132 static int cxacru_bind(struct usbatm_data *usbatm_instance,
1133 		       struct usb_interface *intf, const struct usb_device_id *id)
1134 {
1135 	struct cxacru_data *instance;
1136 	struct usb_device *usb_dev = interface_to_usbdev(intf);
1137 	struct usb_host_endpoint *cmd_ep = usb_dev->ep_in[CXACRU_EP_CMD];
1138 	int ret;
1139 
1140 	/* instance init */
1141 	instance = kzalloc(sizeof(*instance), GFP_KERNEL);
1142 	if (!instance)
1143 		return -ENOMEM;
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 		ret = -ENOMEM;
1170 		goto fail;
1171 	}
1172 	instance->snd_urb = usb_alloc_urb(0, GFP_KERNEL);
1173 	if (!instance->snd_urb) {
1174 		ret = -ENOMEM;
1175 		goto fail;
1176 	}
1177 
1178 	if (!cmd_ep) {
1179 		usb_dbg(usbatm_instance, "cxacru_bind: no command endpoint\n");
1180 		ret = -ENODEV;
1181 		goto fail;
1182 	}
1183 
1184 	if ((cmd_ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1185 			== USB_ENDPOINT_XFER_INT) {
1186 		usb_fill_int_urb(instance->rcv_urb,
1187 			usb_dev, usb_rcvintpipe(usb_dev, CXACRU_EP_CMD),
1188 			instance->rcv_buf, PAGE_SIZE,
1189 			cxacru_blocking_completion, &instance->rcv_done, 1);
1190 
1191 		usb_fill_int_urb(instance->snd_urb,
1192 			usb_dev, usb_sndintpipe(usb_dev, CXACRU_EP_CMD),
1193 			instance->snd_buf, PAGE_SIZE,
1194 			cxacru_blocking_completion, &instance->snd_done, 4);
1195 	} else {
1196 		usb_fill_bulk_urb(instance->rcv_urb,
1197 			usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD),
1198 			instance->rcv_buf, PAGE_SIZE,
1199 			cxacru_blocking_completion, &instance->rcv_done);
1200 
1201 		usb_fill_bulk_urb(instance->snd_urb,
1202 			usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
1203 			instance->snd_buf, PAGE_SIZE,
1204 			cxacru_blocking_completion, &instance->snd_done);
1205 	}
1206 
1207 	mutex_init(&instance->cm_serialize);
1208 
1209 	INIT_DELAYED_WORK(&instance->poll_work, cxacru_poll_status);
1210 
1211 	usbatm_instance->driver_data = instance;
1212 
1213 	usbatm_instance->flags = (cxacru_card_status(instance) ? 0 : UDSL_SKIP_HEAVY_INIT);
1214 
1215 	return 0;
1216 
1217  fail:
1218 	free_page((unsigned long) instance->snd_buf);
1219 	free_page((unsigned long) instance->rcv_buf);
1220 	usb_free_urb(instance->snd_urb);
1221 	usb_free_urb(instance->rcv_urb);
1222 	kfree(instance);
1223 
1224 	return ret;
1225 }
1226 
cxacru_unbind(struct usbatm_data * usbatm_instance,struct usb_interface * intf)1227 static void cxacru_unbind(struct usbatm_data *usbatm_instance,
1228 		struct usb_interface *intf)
1229 {
1230 	struct cxacru_data *instance = usbatm_instance->driver_data;
1231 	int is_polling = 1;
1232 
1233 	usb_dbg(usbatm_instance, "cxacru_unbind entered\n");
1234 
1235 	if (!instance) {
1236 		usb_dbg(usbatm_instance, "cxacru_unbind: NULL instance!\n");
1237 		return;
1238 	}
1239 
1240 	mutex_lock(&instance->poll_state_serialize);
1241 	BUG_ON(instance->poll_state == CXPOLL_SHUTDOWN);
1242 
1243 	/* ensure that status polling continues unless
1244 	 * it has already stopped */
1245 	if (instance->poll_state == CXPOLL_STOPPED)
1246 		is_polling = 0;
1247 
1248 	/* stop polling from being stopped or started */
1249 	instance->poll_state = CXPOLL_SHUTDOWN;
1250 	mutex_unlock(&instance->poll_state_serialize);
1251 
1252 	if (is_polling)
1253 		cancel_delayed_work_sync(&instance->poll_work);
1254 
1255 	usb_kill_urb(instance->snd_urb);
1256 	usb_kill_urb(instance->rcv_urb);
1257 	usb_free_urb(instance->snd_urb);
1258 	usb_free_urb(instance->rcv_urb);
1259 
1260 	free_page((unsigned long) instance->snd_buf);
1261 	free_page((unsigned long) instance->rcv_buf);
1262 
1263 	kfree(instance);
1264 
1265 	usbatm_instance->driver_data = NULL;
1266 }
1267 
1268 static const struct cxacru_modem_type cxacru_cafe = {
1269 	.pll_f_clk = 0x02d874df,
1270 	.pll_b_clk = 0x0196a51a,
1271 	.boot_rom_patch = 1,
1272 };
1273 
1274 static const struct cxacru_modem_type cxacru_cb00 = {
1275 	.pll_f_clk = 0x5,
1276 	.pll_b_clk = 0x3,
1277 	.boot_rom_patch = 0,
1278 };
1279 
1280 static const struct usb_device_id cxacru_usb_ids[] = {
1281 	{ /* V = Conexant			P = ADSL modem (Euphrates project)	*/
1282 		USB_DEVICE(0x0572, 0xcafe),	.driver_info = (unsigned long) &cxacru_cafe
1283 	},
1284 	{ /* V = Conexant			P = ADSL modem (Hasbani project)	*/
1285 		USB_DEVICE(0x0572, 0xcb00),	.driver_info = (unsigned long) &cxacru_cb00
1286 	},
1287 	{ /* V = Conexant			P = ADSL modem				*/
1288 		USB_DEVICE(0x0572, 0xcb01),	.driver_info = (unsigned long) &cxacru_cb00
1289 	},
1290 	{ /* V = Conexant			P = ADSL modem (Well PTI-800) */
1291 		USB_DEVICE(0x0572, 0xcb02),	.driver_info = (unsigned long) &cxacru_cb00
1292 	},
1293 	{ /* V = Conexant			P = ADSL modem				*/
1294 		USB_DEVICE(0x0572, 0xcb06),	.driver_info = (unsigned long) &cxacru_cb00
1295 	},
1296 	{ /* V = Conexant			P = ADSL modem (ZTE ZXDSL 852)		*/
1297 		USB_DEVICE(0x0572, 0xcb07),	.driver_info = (unsigned long) &cxacru_cb00
1298 	},
1299 	{ /* V = Olitec				P = ADSL modem version 2		*/
1300 		USB_DEVICE(0x08e3, 0x0100),	.driver_info = (unsigned long) &cxacru_cafe
1301 	},
1302 	{ /* V = Olitec				P = ADSL modem version 3		*/
1303 		USB_DEVICE(0x08e3, 0x0102),	.driver_info = (unsigned long) &cxacru_cb00
1304 	},
1305 	{ /* V = Trust/Amigo Technology Co.	P = AMX-CA86U				*/
1306 		USB_DEVICE(0x0eb0, 0x3457),	.driver_info = (unsigned long) &cxacru_cafe
1307 	},
1308 	{ /* V = Zoom				P = 5510				*/
1309 		USB_DEVICE(0x1803, 0x5510),	.driver_info = (unsigned long) &cxacru_cb00
1310 	},
1311 	{ /* V = Draytek			P = Vigor 318				*/
1312 		USB_DEVICE(0x0675, 0x0200),	.driver_info = (unsigned long) &cxacru_cb00
1313 	},
1314 	{ /* V = Zyxel				P = 630-C1 aka OMNI ADSL USB (Annex A)	*/
1315 		USB_DEVICE(0x0586, 0x330a),	.driver_info = (unsigned long) &cxacru_cb00
1316 	},
1317 	{ /* V = Zyxel				P = 630-C3 aka OMNI ADSL USB (Annex B)	*/
1318 		USB_DEVICE(0x0586, 0x330b),	.driver_info = (unsigned long) &cxacru_cb00
1319 	},
1320 	{ /* V = Aethra				P = Starmodem UM1020			*/
1321 		USB_DEVICE(0x0659, 0x0020),	.driver_info = (unsigned long) &cxacru_cb00
1322 	},
1323 	{ /* V = Aztech Systems			P = ? AKA Pirelli AUA-010		*/
1324 		USB_DEVICE(0x0509, 0x0812),	.driver_info = (unsigned long) &cxacru_cb00
1325 	},
1326 	{ /* V = Netopia			P = Cayman 3341(Annex A)/3351(Annex B)	*/
1327 		USB_DEVICE(0x100d, 0xcb01),	.driver_info = (unsigned long) &cxacru_cb00
1328 	},
1329 	{ /* V = Netopia			P = Cayman 3342(Annex A)/3352(Annex B)	*/
1330 		USB_DEVICE(0x100d, 0x3342),	.driver_info = (unsigned long) &cxacru_cb00
1331 	},
1332 	{}
1333 };
1334 
1335 MODULE_DEVICE_TABLE(usb, cxacru_usb_ids);
1336 
1337 static struct usbatm_driver cxacru_driver = {
1338 	.driver_name	= cxacru_driver_name,
1339 	.bind		= cxacru_bind,
1340 	.heavy_init	= cxacru_heavy_init,
1341 	.unbind		= cxacru_unbind,
1342 	.atm_start	= cxacru_atm_start,
1343 	.atm_stop	= cxacru_remove_device_files,
1344 	.bulk_in	= CXACRU_EP_DATA,
1345 	.bulk_out	= CXACRU_EP_DATA,
1346 	.rx_padding	= 3,
1347 	.tx_padding	= 11,
1348 };
1349 
cxacru_usb_probe(struct usb_interface * intf,const struct usb_device_id * id)1350 static int cxacru_usb_probe(struct usb_interface *intf,
1351 		const struct usb_device_id *id)
1352 {
1353 	struct usb_device *usb_dev = interface_to_usbdev(intf);
1354 	char buf[15];
1355 
1356 	/* Avoid ADSL routers (cx82310_eth).
1357 	 * Abort if bDeviceClass is 0xff and iProduct is "USB NET CARD".
1358 	 */
1359 	if (usb_dev->descriptor.bDeviceClass == USB_CLASS_VENDOR_SPEC
1360 			&& usb_string(usb_dev, usb_dev->descriptor.iProduct,
1361 				buf, sizeof(buf)) > 0) {
1362 		if (!strcmp(buf, "USB NET CARD")) {
1363 			dev_info(&intf->dev, "ignoring cx82310_eth device\n");
1364 			return -ENODEV;
1365 		}
1366 	}
1367 
1368 	return usbatm_usb_probe(intf, id, &cxacru_driver);
1369 }
1370 
1371 static struct usb_driver cxacru_usb_driver = {
1372 	.name		= cxacru_driver_name,
1373 	.probe		= cxacru_usb_probe,
1374 	.disconnect	= usbatm_usb_disconnect,
1375 	.id_table	= cxacru_usb_ids
1376 };
1377 
1378 module_usb_driver(cxacru_usb_driver);
1379 
1380 MODULE_AUTHOR(DRIVER_AUTHOR);
1381 MODULE_DESCRIPTION(DRIVER_DESC);
1382 MODULE_LICENSE("GPL");
1383 MODULE_VERSION(DRIVER_VERSION);
1384