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467cc396 IPG |
1 | /* |
2 | * Intel Wireless WiMAX Connection 2400m | |
3 | * Firmware uploader | |
4 | * | |
5 | * | |
6 | * Copyright (C) 2007-2008 Intel Corporation. All rights reserved. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * * Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * * Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in | |
16 | * the documentation and/or other materials provided with the | |
17 | * distribution. | |
18 | * * Neither the name of Intel Corporation nor the names of its | |
19 | * contributors may be used to endorse or promote products derived | |
20 | * from this software without specific prior written permission. | |
21 | * | |
22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
23 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
24 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
25 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
26 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
27 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
28 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
29 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
30 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
31 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
32 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
33 | * | |
34 | * | |
35 | * Intel Corporation <linux-wimax@intel.com> | |
36 | * Yanir Lubetkin <yanirx.lubetkin@intel.com> | |
37 | * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> | |
38 | * - Initial implementation | |
39 | * | |
40 | * | |
41 | * THE PROCEDURE | |
42 | * | |
aba3792a IPG |
43 | * The 2400m and derived devices work in two modes: boot-mode or |
44 | * normal mode. In boot mode we can execute only a handful of commands | |
45 | * targeted at uploading the firmware and launching it. | |
467cc396 IPG |
46 | * |
47 | * The 2400m enters boot mode when it is first connected to the | |
48 | * system, when it crashes and when you ask it to reboot. There are | |
49 | * two submodes of the boot mode: signed and non-signed. Signed takes | |
50 | * firmwares signed with a certain private key, non-signed takes any | |
51 | * firmware. Normal hardware takes only signed firmware. | |
52 | * | |
aba3792a IPG |
53 | * On boot mode, in USB, we write to the device using the bulk out |
54 | * endpoint and read from it in the notification endpoint. In SDIO we | |
55 | * talk to it via the write address and read from the read address. | |
56 | * | |
57 | * Upon entrance to boot mode, the device sends (preceeded with a few | |
58 | * zero length packets (ZLPs) on the notification endpoint in USB) a | |
59 | * reboot barker (4 le32 words with the same value). We ack it by | |
60 | * sending the same barker to the device. The device acks with a | |
61 | * reboot ack barker (4 le32 words with value I2400M_ACK_BARKER) and | |
62 | * then is fully booted. At this point we can upload the firmware. | |
63 | * | |
64 | * Note that different iterations of the device and EEPROM | |
65 | * configurations will send different [re]boot barkers; these are | |
66 | * collected in i2400m_barker_db along with the firmware | |
67 | * characteristics they require. | |
467cc396 IPG |
68 | * |
69 | * This process is accomplished by the i2400m_bootrom_init() | |
70 | * function. All the device interaction happens through the | |
71 | * i2400m_bm_cmd() [boot mode command]. Special return values will | |
aba3792a | 72 | * indicate if the device did reset during the process. |
467cc396 IPG |
73 | * |
74 | * After this, we read the MAC address and then (if needed) | |
75 | * reinitialize the device. We need to read it ahead of time because | |
76 | * in the future, we might not upload the firmware until userspace | |
77 | * 'ifconfig up's the device. | |
78 | * | |
79 | * We can then upload the firmware file. The file is composed of a BCF | |
80 | * header (basic data, keys and signatures) and a list of write | |
81 | * commands and payloads. We first upload the header | |
82 | * [i2400m_dnload_init()] and then pass the commands and payloads | |
83 | * verbatim to the i2400m_bm_cmd() function | |
84 | * [i2400m_dnload_bcf()]. Then we tell the device to jump to the new | |
85 | * firmware [i2400m_dnload_finalize()]. | |
86 | * | |
87 | * Once firmware is uploaded, we are good to go :) | |
88 | * | |
89 | * When we don't know in which mode we are, we first try by sending a | |
90 | * warm reset request that will take us to boot-mode. If we time out | |
91 | * waiting for a reboot barker, that means maybe we are already in | |
92 | * boot mode, so we send a reboot barker. | |
93 | * | |
94 | * COMMAND EXECUTION | |
95 | * | |
96 | * This code (and process) is single threaded; for executing commands, | |
97 | * we post a URB to the notification endpoint, post the command, wait | |
98 | * for data on the notification buffer. We don't need to worry about | |
99 | * others as we know we are the only ones in there. | |
100 | * | |
101 | * BACKEND IMPLEMENTATION | |
102 | * | |
103 | * This code is bus-generic; the bus-specific driver provides back end | |
104 | * implementations to send a boot mode command to the device and to | |
105 | * read an acknolwedgement from it (or an asynchronous notification) | |
106 | * from it. | |
107 | * | |
108 | * ROADMAP | |
109 | * | |
aba3792a IPG |
110 | * i2400m_barker_db_init Called by i2400m_driver_init() |
111 | * i2400m_barker_db_add | |
112 | * | |
113 | * i2400m_barker_db_exit Called by i2400m_driver_exit() | |
114 | * | |
467cc396 IPG |
115 | * i2400m_dev_bootstrap Called by __i2400m_dev_start() |
116 | * request_firmware | |
117 | * i2400m_fw_check | |
118 | * i2400m_fw_dnload | |
119 | * release_firmware | |
120 | * | |
121 | * i2400m_fw_dnload | |
122 | * i2400m_bootrom_init | |
123 | * i2400m_bm_cmd | |
124 | * i2400m->bus_reset | |
125 | * i2400m_dnload_init | |
126 | * i2400m_dnload_init_signed | |
127 | * i2400m_dnload_init_nonsigned | |
128 | * i2400m_download_chunk | |
129 | * i2400m_bm_cmd | |
130 | * i2400m_dnload_bcf | |
131 | * i2400m_bm_cmd | |
132 | * i2400m_dnload_finalize | |
133 | * i2400m_bm_cmd | |
134 | * | |
135 | * i2400m_bm_cmd | |
136 | * i2400m->bus_bm_cmd_send() | |
137 | * i2400m->bus_bm_wait_for_ack | |
138 | * __i2400m_bm_ack_verify | |
aba3792a | 139 | * i2400m_is_boot_barker |
467cc396 IPG |
140 | * |
141 | * i2400m_bm_cmd_prepare Used by bus-drivers to prep | |
142 | * commands before sending | |
143 | */ | |
144 | #include <linux/firmware.h> | |
145 | #include <linux/sched.h> | |
146 | #include <linux/usb.h> | |
147 | #include "i2400m.h" | |
148 | ||
149 | ||
150 | #define D_SUBMODULE fw | |
151 | #include "debug-levels.h" | |
152 | ||
153 | ||
154 | static const __le32 i2400m_ACK_BARKER[4] = { | |
ee437770 HH |
155 | cpu_to_le32(I2400M_ACK_BARKER), |
156 | cpu_to_le32(I2400M_ACK_BARKER), | |
157 | cpu_to_le32(I2400M_ACK_BARKER), | |
158 | cpu_to_le32(I2400M_ACK_BARKER) | |
467cc396 IPG |
159 | }; |
160 | ||
161 | ||
162 | /** | |
163 | * Prepare a boot-mode command for delivery | |
164 | * | |
165 | * @cmd: pointer to bootrom header to prepare | |
166 | * | |
167 | * Computes checksum if so needed. After calling this function, DO NOT | |
168 | * modify the command or header as the checksum won't work anymore. | |
169 | * | |
170 | * We do it from here because some times we cannot do it in the | |
171 | * original context the command was sent (it is a const), so when we | |
172 | * copy it to our staging buffer, we add the checksum there. | |
173 | */ | |
174 | void i2400m_bm_cmd_prepare(struct i2400m_bootrom_header *cmd) | |
175 | { | |
176 | if (i2400m_brh_get_use_checksum(cmd)) { | |
177 | int i; | |
178 | u32 checksum = 0; | |
179 | const u32 *checksum_ptr = (void *) cmd->payload; | |
180 | for (i = 0; i < cmd->data_size / 4; i++) | |
181 | checksum += cpu_to_le32(*checksum_ptr++); | |
182 | checksum += cmd->command + cmd->target_addr + cmd->data_size; | |
183 | cmd->block_checksum = cpu_to_le32(checksum); | |
184 | } | |
185 | } | |
186 | EXPORT_SYMBOL_GPL(i2400m_bm_cmd_prepare); | |
187 | ||
188 | ||
aba3792a IPG |
189 | /* |
190 | * Database of known barkers. | |
191 | * | |
192 | * A barker is what the device sends indicating he is ready to be | |
193 | * bootloaded. Different versions of the device will send different | |
194 | * barkers. Depending on the barker, it might mean the device wants | |
195 | * some kind of firmware or the other. | |
196 | */ | |
197 | static struct i2400m_barker_db { | |
198 | __le32 data[4]; | |
199 | } *i2400m_barker_db; | |
200 | static size_t i2400m_barker_db_used, i2400m_barker_db_size; | |
201 | ||
202 | ||
203 | static | |
204 | int i2400m_zrealloc_2x(void **ptr, size_t *_count, size_t el_size, | |
205 | gfp_t gfp_flags) | |
206 | { | |
207 | size_t old_count = *_count, | |
208 | new_count = old_count ? 2 * old_count : 2, | |
209 | old_size = el_size * old_count, | |
210 | new_size = el_size * new_count; | |
211 | void *nptr = krealloc(*ptr, new_size, gfp_flags); | |
212 | if (nptr) { | |
213 | /* zero the other half or the whole thing if old_count | |
214 | * was zero */ | |
215 | if (old_size == 0) | |
216 | memset(nptr, 0, new_size); | |
217 | else | |
218 | memset(nptr + old_size, 0, old_size); | |
219 | *_count = new_count; | |
220 | *ptr = nptr; | |
221 | return 0; | |
222 | } else | |
223 | return -ENOMEM; | |
224 | } | |
225 | ||
226 | ||
227 | /* | |
228 | * Add a barker to the database | |
229 | * | |
230 | * This cannot used outside of this module and only at at module_init | |
231 | * time. This is to avoid the need to do locking. | |
232 | */ | |
233 | static | |
234 | int i2400m_barker_db_add(u32 barker_id) | |
235 | { | |
236 | int result; | |
237 | ||
238 | struct i2400m_barker_db *barker; | |
239 | if (i2400m_barker_db_used >= i2400m_barker_db_size) { | |
240 | result = i2400m_zrealloc_2x( | |
241 | (void **) &i2400m_barker_db, &i2400m_barker_db_size, | |
242 | sizeof(i2400m_barker_db[0]), GFP_KERNEL); | |
243 | if (result < 0) | |
244 | return result; | |
245 | } | |
246 | barker = i2400m_barker_db + i2400m_barker_db_used++; | |
247 | barker->data[0] = le32_to_cpu(barker_id); | |
248 | barker->data[1] = le32_to_cpu(barker_id); | |
249 | barker->data[2] = le32_to_cpu(barker_id); | |
250 | barker->data[3] = le32_to_cpu(barker_id); | |
251 | return 0; | |
252 | } | |
253 | ||
254 | ||
255 | void i2400m_barker_db_exit(void) | |
256 | { | |
257 | kfree(i2400m_barker_db); | |
258 | i2400m_barker_db = NULL; | |
259 | i2400m_barker_db_size = 0; | |
260 | i2400m_barker_db_used = 0; | |
261 | } | |
262 | ||
263 | ||
264 | /* | |
265 | * Helper function to add all the known stable barkers to the barker | |
266 | * database. | |
267 | */ | |
268 | static | |
269 | int i2400m_barker_db_known_barkers(void) | |
270 | { | |
271 | int result; | |
272 | ||
273 | result = i2400m_barker_db_add(I2400M_NBOOT_BARKER); | |
274 | if (result < 0) | |
275 | goto error_add; | |
276 | result = i2400m_barker_db_add(I2400M_SBOOT_BARKER); | |
277 | if (result < 0) | |
278 | goto error_add; | |
279 | error_add: | |
280 | return result; | |
281 | } | |
282 | ||
283 | ||
284 | /* | |
285 | * Initialize the barker database | |
286 | * | |
287 | * This can only be used from the module_init function for this | |
288 | * module; this is to avoid the need to do locking. | |
289 | * | |
290 | * @options: command line argument with extra barkers to | |
291 | * recognize. This is a comma-separated list of 32-bit hex | |
292 | * numbers. They are appended to the existing list. Setting 0 | |
293 | * cleans the existing list and starts a new one. | |
294 | */ | |
295 | int i2400m_barker_db_init(const char *_options) | |
296 | { | |
297 | int result; | |
298 | char *options = NULL, *options_orig, *token; | |
299 | ||
300 | i2400m_barker_db = NULL; | |
301 | i2400m_barker_db_size = 0; | |
302 | i2400m_barker_db_used = 0; | |
303 | ||
304 | result = i2400m_barker_db_known_barkers(); | |
305 | if (result < 0) | |
306 | goto error_add; | |
307 | /* parse command line options from i2400m.barkers */ | |
308 | if (_options != NULL) { | |
309 | unsigned barker; | |
310 | ||
311 | options_orig = kstrdup(_options, GFP_KERNEL); | |
312 | if (options_orig == NULL) | |
313 | goto error_parse; | |
314 | options = options_orig; | |
315 | ||
316 | while ((token = strsep(&options, ",")) != NULL) { | |
317 | if (*token == '\0') /* eat joint commas */ | |
318 | continue; | |
319 | if (sscanf(token, "%x", &barker) != 1 | |
320 | || barker > 0xffffffff) { | |
321 | printk(KERN_ERR "%s: can't recognize " | |
322 | "i2400m.barkers value '%s' as " | |
323 | "a 32-bit number\n", | |
324 | __func__, token); | |
325 | result = -EINVAL; | |
326 | goto error_parse; | |
327 | } | |
328 | if (barker == 0) { | |
329 | /* clean list and start new */ | |
330 | i2400m_barker_db_exit(); | |
331 | continue; | |
332 | } | |
333 | result = i2400m_barker_db_add(barker); | |
334 | if (result < 0) | |
335 | goto error_add; | |
336 | } | |
337 | kfree(options_orig); | |
338 | } | |
339 | return 0; | |
340 | ||
341 | error_parse: | |
342 | error_add: | |
343 | kfree(i2400m_barker_db); | |
344 | return result; | |
345 | } | |
346 | ||
347 | ||
348 | /* | |
349 | * Recognize a boot barker | |
350 | * | |
351 | * @buf: buffer where the boot barker. | |
352 | * @buf_size: size of the buffer (has to be 16 bytes). It is passed | |
353 | * here so the function can check it for the caller. | |
354 | * | |
355 | * Note that as a side effect, upon identifying the obtained boot | |
356 | * barker, this function will set i2400m->barker to point to the right | |
357 | * barker database entry. Subsequent calls to the function will result | |
358 | * in verifying that the same type of boot barker is returned when the | |
359 | * device [re]boots (as long as the same device instance is used). | |
360 | * | |
361 | * Return: 0 if @buf matches a known boot barker. -ENOENT if the | |
362 | * buffer in @buf doesn't match any boot barker in the database or | |
363 | * -EILSEQ if the buffer doesn't have the right size. | |
364 | */ | |
365 | int i2400m_is_boot_barker(struct i2400m *i2400m, | |
366 | const void *buf, size_t buf_size) | |
367 | { | |
368 | int result; | |
369 | struct device *dev = i2400m_dev(i2400m); | |
370 | struct i2400m_barker_db *barker; | |
371 | int i; | |
372 | ||
373 | result = -ENOENT; | |
374 | if (buf_size != sizeof(i2400m_barker_db[i].data)) | |
375 | return result; | |
376 | ||
377 | /* Short circuit if we have already discovered the barker | |
378 | * associated with the device. */ | |
379 | if (i2400m->barker | |
380 | && !memcmp(buf, i2400m->barker, sizeof(i2400m->barker->data))) { | |
381 | unsigned index = (i2400m->barker - i2400m_barker_db) | |
382 | / sizeof(*i2400m->barker); | |
383 | d_printf(2, dev, "boot barker cache-confirmed #%u/%08x\n", | |
384 | index, le32_to_cpu(i2400m->barker->data[0])); | |
385 | return 0; | |
386 | } | |
387 | ||
388 | for (i = 0; i < i2400m_barker_db_used; i++) { | |
389 | barker = &i2400m_barker_db[i]; | |
390 | BUILD_BUG_ON(sizeof(barker->data) != 16); | |
391 | if (memcmp(buf, barker->data, sizeof(barker->data))) | |
392 | continue; | |
393 | ||
394 | if (i2400m->barker == NULL) { | |
395 | i2400m->barker = barker; | |
396 | d_printf(1, dev, "boot barker set to #%u/%08x\n", | |
397 | i, le32_to_cpu(barker->data[0])); | |
398 | if (barker->data[0] == le32_to_cpu(I2400M_NBOOT_BARKER)) | |
399 | i2400m->sboot = 0; | |
400 | else | |
401 | i2400m->sboot = 1; | |
402 | } else if (i2400m->barker != barker) { | |
403 | dev_err(dev, "HW inconsistency: device " | |
404 | "reports a different boot barker " | |
405 | "than set (from %08x to %08x)\n", | |
406 | le32_to_cpu(i2400m->barker->data[0]), | |
407 | le32_to_cpu(barker->data[0])); | |
408 | result = -EIO; | |
409 | } else | |
410 | d_printf(2, dev, "boot barker confirmed #%u/%08x\n", | |
411 | i, le32_to_cpu(barker->data[0])); | |
412 | result = 0; | |
413 | break; | |
414 | } | |
415 | return result; | |
416 | } | |
417 | EXPORT_SYMBOL_GPL(i2400m_is_boot_barker); | |
418 | ||
419 | ||
467cc396 IPG |
420 | /* |
421 | * Verify the ack data received | |
422 | * | |
423 | * Given a reply to a boot mode command, chew it and verify everything | |
424 | * is ok. | |
425 | * | |
426 | * @opcode: opcode which generated this ack. For error messages. | |
427 | * @ack: pointer to ack data we received | |
428 | * @ack_size: size of that data buffer | |
429 | * @flags: I2400M_BM_CMD_* flags we called the command with. | |
430 | * | |
431 | * Way too long function -- maybe it should be further split | |
432 | */ | |
433 | static | |
434 | ssize_t __i2400m_bm_ack_verify(struct i2400m *i2400m, int opcode, | |
435 | struct i2400m_bootrom_header *ack, | |
436 | size_t ack_size, int flags) | |
437 | { | |
438 | ssize_t result = -ENOMEM; | |
439 | struct device *dev = i2400m_dev(i2400m); | |
440 | ||
441 | d_fnstart(8, dev, "(i2400m %p opcode %d ack %p size %zu)\n", | |
442 | i2400m, opcode, ack, ack_size); | |
443 | if (ack_size < sizeof(*ack)) { | |
444 | result = -EIO; | |
445 | dev_err(dev, "boot-mode cmd %d: HW BUG? notification didn't " | |
446 | "return enough data (%zu bytes vs %zu expected)\n", | |
447 | opcode, ack_size, sizeof(*ack)); | |
448 | goto error_ack_short; | |
449 | } | |
aba3792a IPG |
450 | result = i2400m_is_boot_barker(i2400m, ack, ack_size); |
451 | if (result >= 0) { | |
467cc396 | 452 | result = -ERESTARTSYS; |
aba3792a | 453 | d_printf(6, dev, "boot-mode cmd %d: HW boot barker\n", opcode); |
467cc396 IPG |
454 | goto error_reboot; |
455 | } | |
456 | if (ack_size == sizeof(i2400m_ACK_BARKER) | |
457 | && memcmp(ack, i2400m_ACK_BARKER, sizeof(*ack)) == 0) { | |
458 | result = -EISCONN; | |
459 | d_printf(3, dev, "boot-mode cmd %d: HW reboot ack barker\n", | |
460 | opcode); | |
461 | goto error_reboot_ack; | |
462 | } | |
463 | result = 0; | |
464 | if (flags & I2400M_BM_CMD_RAW) | |
465 | goto out_raw; | |
466 | ack->data_size = le32_to_cpu(ack->data_size); | |
467 | ack->target_addr = le32_to_cpu(ack->target_addr); | |
468 | ack->block_checksum = le32_to_cpu(ack->block_checksum); | |
469 | d_printf(5, dev, "boot-mode cmd %d: notification for opcode %u " | |
470 | "response %u csum %u rr %u da %u\n", | |
471 | opcode, i2400m_brh_get_opcode(ack), | |
472 | i2400m_brh_get_response(ack), | |
473 | i2400m_brh_get_use_checksum(ack), | |
474 | i2400m_brh_get_response_required(ack), | |
475 | i2400m_brh_get_direct_access(ack)); | |
476 | result = -EIO; | |
477 | if (i2400m_brh_get_signature(ack) != 0xcbbc) { | |
478 | dev_err(dev, "boot-mode cmd %d: HW BUG? wrong signature " | |
479 | "0x%04x\n", opcode, i2400m_brh_get_signature(ack)); | |
480 | goto error_ack_signature; | |
481 | } | |
482 | if (opcode != -1 && opcode != i2400m_brh_get_opcode(ack)) { | |
483 | dev_err(dev, "boot-mode cmd %d: HW BUG? " | |
484 | "received response for opcode %u, expected %u\n", | |
485 | opcode, i2400m_brh_get_opcode(ack), opcode); | |
486 | goto error_ack_opcode; | |
487 | } | |
488 | if (i2400m_brh_get_response(ack) != 0) { /* failed? */ | |
489 | dev_err(dev, "boot-mode cmd %d: error; hw response %u\n", | |
490 | opcode, i2400m_brh_get_response(ack)); | |
491 | goto error_ack_failed; | |
492 | } | |
493 | if (ack_size < ack->data_size + sizeof(*ack)) { | |
494 | dev_err(dev, "boot-mode cmd %d: SW BUG " | |
495 | "driver provided only %zu bytes for %zu bytes " | |
496 | "of data\n", opcode, ack_size, | |
497 | (size_t) le32_to_cpu(ack->data_size) + sizeof(*ack)); | |
498 | goto error_ack_short_buffer; | |
499 | } | |
500 | result = ack_size; | |
501 | /* Don't you love this stack of empty targets? Well, I don't | |
502 | * either, but it helps track exactly who comes in here and | |
503 | * why :) */ | |
504 | error_ack_short_buffer: | |
505 | error_ack_failed: | |
506 | error_ack_opcode: | |
507 | error_ack_signature: | |
508 | out_raw: | |
509 | error_reboot_ack: | |
510 | error_reboot: | |
511 | error_ack_short: | |
512 | d_fnend(8, dev, "(i2400m %p opcode %d ack %p size %zu) = %d\n", | |
513 | i2400m, opcode, ack, ack_size, (int) result); | |
514 | return result; | |
515 | } | |
516 | ||
517 | ||
518 | /** | |
519 | * i2400m_bm_cmd - Execute a boot mode command | |
520 | * | |
521 | * @cmd: buffer containing the command data (pointing at the header). | |
522 | * This data can be ANYWHERE (for USB, we will copy it to an | |
523 | * specific buffer). Make sure everything is in proper little | |
524 | * endian. | |
525 | * | |
526 | * A raw buffer can be also sent, just cast it and set flags to | |
527 | * I2400M_BM_CMD_RAW. | |
528 | * | |
529 | * This function will generate a checksum for you if the | |
530 | * checksum bit in the command is set (unless I2400M_BM_CMD_RAW | |
531 | * is set). | |
532 | * | |
533 | * You can use the i2400m->bm_cmd_buf to stage your commands and | |
534 | * send them. | |
535 | * | |
536 | * If NULL, no command is sent (we just wait for an ack). | |
537 | * | |
538 | * @cmd_size: size of the command. Will be auto padded to the | |
539 | * bus-specific drivers padding requirements. | |
540 | * | |
541 | * @ack: buffer where to place the acknowledgement. If it is a regular | |
542 | * command response, all fields will be returned with the right, | |
543 | * native endianess. | |
544 | * | |
545 | * You *cannot* use i2400m->bm_ack_buf for this buffer. | |
546 | * | |
547 | * @ack_size: size of @ack, 16 aligned; you need to provide at least | |
548 | * sizeof(*ack) bytes and then enough to contain the return data | |
549 | * from the command | |
550 | * | |
551 | * @flags: see I2400M_BM_CMD_* above. | |
552 | * | |
553 | * @returns: bytes received by the notification; if < 0, an errno code | |
554 | * denoting an error or: | |
555 | * | |
556 | * -ERESTARTSYS The device has rebooted | |
557 | * | |
558 | * Executes a boot-mode command and waits for a response, doing basic | |
559 | * validation on it; if a zero length response is received, it retries | |
560 | * waiting for a response until a non-zero one is received (timing out | |
561 | * after %I2400M_BOOT_RETRIES retries). | |
562 | */ | |
563 | static | |
564 | ssize_t i2400m_bm_cmd(struct i2400m *i2400m, | |
565 | const struct i2400m_bootrom_header *cmd, size_t cmd_size, | |
566 | struct i2400m_bootrom_header *ack, size_t ack_size, | |
567 | int flags) | |
568 | { | |
569 | ssize_t result = -ENOMEM, rx_bytes; | |
570 | struct device *dev = i2400m_dev(i2400m); | |
571 | int opcode = cmd == NULL ? -1 : i2400m_brh_get_opcode(cmd); | |
572 | ||
573 | d_fnstart(6, dev, "(i2400m %p cmd %p size %zu ack %p size %zu)\n", | |
574 | i2400m, cmd, cmd_size, ack, ack_size); | |
575 | BUG_ON(ack_size < sizeof(*ack)); | |
576 | BUG_ON(i2400m->boot_mode == 0); | |
577 | ||
578 | if (cmd != NULL) { /* send the command */ | |
467cc396 IPG |
579 | result = i2400m->bus_bm_cmd_send(i2400m, cmd, cmd_size, flags); |
580 | if (result < 0) | |
581 | goto error_cmd_send; | |
582 | if ((flags & I2400M_BM_CMD_RAW) == 0) | |
583 | d_printf(5, dev, | |
584 | "boot-mode cmd %d csum %u rr %u da %u: " | |
585 | "addr 0x%04x size %u block csum 0x%04x\n", | |
586 | opcode, i2400m_brh_get_use_checksum(cmd), | |
587 | i2400m_brh_get_response_required(cmd), | |
588 | i2400m_brh_get_direct_access(cmd), | |
589 | cmd->target_addr, cmd->data_size, | |
590 | cmd->block_checksum); | |
591 | } | |
592 | result = i2400m->bus_bm_wait_for_ack(i2400m, ack, ack_size); | |
593 | if (result < 0) { | |
594 | dev_err(dev, "boot-mode cmd %d: error waiting for an ack: %d\n", | |
595 | opcode, (int) result); /* bah, %zd doesn't work */ | |
596 | goto error_wait_for_ack; | |
597 | } | |
598 | rx_bytes = result; | |
599 | /* verify the ack and read more if neccessary [result is the | |
600 | * final amount of bytes we get in the ack] */ | |
601 | result = __i2400m_bm_ack_verify(i2400m, opcode, ack, ack_size, flags); | |
602 | if (result < 0) | |
603 | goto error_bad_ack; | |
604 | /* Don't you love this stack of empty targets? Well, I don't | |
605 | * either, but it helps track exactly who comes in here and | |
606 | * why :) */ | |
607 | result = rx_bytes; | |
608 | error_bad_ack: | |
609 | error_wait_for_ack: | |
610 | error_cmd_send: | |
611 | d_fnend(6, dev, "(i2400m %p cmd %p size %zu ack %p size %zu) = %d\n", | |
612 | i2400m, cmd, cmd_size, ack, ack_size, (int) result); | |
613 | return result; | |
614 | } | |
615 | ||
616 | ||
617 | /** | |
618 | * i2400m_download_chunk - write a single chunk of data to the device's memory | |
619 | * | |
620 | * @i2400m: device descriptor | |
621 | * @buf: the buffer to write | |
622 | * @buf_len: length of the buffer to write | |
623 | * @addr: address in the device memory space | |
624 | * @direct: bootrom write mode | |
625 | * @do_csum: should a checksum validation be performed | |
626 | */ | |
627 | static int i2400m_download_chunk(struct i2400m *i2400m, const void *chunk, | |
628 | size_t __chunk_len, unsigned long addr, | |
629 | unsigned int direct, unsigned int do_csum) | |
630 | { | |
631 | int ret; | |
8593a196 | 632 | size_t chunk_len = ALIGN(__chunk_len, I2400M_PL_ALIGN); |
467cc396 IPG |
633 | struct device *dev = i2400m_dev(i2400m); |
634 | struct { | |
635 | struct i2400m_bootrom_header cmd; | |
636 | u8 cmd_payload[chunk_len]; | |
637 | } __attribute__((packed)) *buf; | |
638 | struct i2400m_bootrom_header ack; | |
639 | ||
640 | d_fnstart(5, dev, "(i2400m %p chunk %p __chunk_len %zu addr 0x%08lx " | |
641 | "direct %u do_csum %u)\n", i2400m, chunk, __chunk_len, | |
642 | addr, direct, do_csum); | |
643 | buf = i2400m->bm_cmd_buf; | |
644 | memcpy(buf->cmd_payload, chunk, __chunk_len); | |
645 | memset(buf->cmd_payload + __chunk_len, 0xad, chunk_len - __chunk_len); | |
646 | ||
647 | buf->cmd.command = i2400m_brh_command(I2400M_BRH_WRITE, | |
648 | __chunk_len & 0x3 ? 0 : do_csum, | |
649 | __chunk_len & 0xf ? 0 : direct); | |
650 | buf->cmd.target_addr = cpu_to_le32(addr); | |
651 | buf->cmd.data_size = cpu_to_le32(__chunk_len); | |
652 | ret = i2400m_bm_cmd(i2400m, &buf->cmd, sizeof(buf->cmd) + chunk_len, | |
653 | &ack, sizeof(ack), 0); | |
654 | if (ret >= 0) | |
655 | ret = 0; | |
656 | d_fnend(5, dev, "(i2400m %p chunk %p __chunk_len %zu addr 0x%08lx " | |
657 | "direct %u do_csum %u) = %d\n", i2400m, chunk, __chunk_len, | |
658 | addr, direct, do_csum, ret); | |
659 | return ret; | |
660 | } | |
661 | ||
662 | ||
663 | /* | |
664 | * Download a BCF file's sections to the device | |
665 | * | |
666 | * @i2400m: device descriptor | |
667 | * @bcf: pointer to firmware data (followed by the payloads). Assumed | |
668 | * verified and consistent. | |
669 | * @bcf_len: length (in bytes) of the @bcf buffer. | |
670 | * | |
671 | * Returns: < 0 errno code on error or the offset to the jump instruction. | |
672 | * | |
673 | * Given a BCF file, downloads each section (a command and a payload) | |
674 | * to the device's address space. Actually, it just executes each | |
675 | * command i the BCF file. | |
676 | * | |
677 | * The section size has to be aligned to 4 bytes AND the padding has | |
678 | * to be taken from the firmware file, as the signature takes it into | |
679 | * account. | |
680 | */ | |
681 | static | |
682 | ssize_t i2400m_dnload_bcf(struct i2400m *i2400m, | |
683 | const struct i2400m_bcf_hdr *bcf, size_t bcf_len) | |
684 | { | |
685 | ssize_t ret; | |
686 | struct device *dev = i2400m_dev(i2400m); | |
687 | size_t offset, /* iterator offset */ | |
688 | data_size, /* Size of the data payload */ | |
689 | section_size, /* Size of the whole section (cmd + payload) */ | |
690 | section = 1; | |
691 | const struct i2400m_bootrom_header *bh; | |
692 | struct i2400m_bootrom_header ack; | |
693 | ||
694 | d_fnstart(3, dev, "(i2400m %p bcf %p bcf_len %zu)\n", | |
695 | i2400m, bcf, bcf_len); | |
696 | /* Iterate over the command blocks in the BCF file that start | |
697 | * after the header */ | |
698 | offset = le32_to_cpu(bcf->header_len) * sizeof(u32); | |
699 | while (1) { /* start sending the file */ | |
700 | bh = (void *) bcf + offset; | |
701 | data_size = le32_to_cpu(bh->data_size); | |
702 | section_size = ALIGN(sizeof(*bh) + data_size, 4); | |
703 | d_printf(7, dev, | |
704 | "downloading section #%zu (@%zu %zu B) to 0x%08x\n", | |
705 | section, offset, sizeof(*bh) + data_size, | |
706 | le32_to_cpu(bh->target_addr)); | |
707 | if (i2400m_brh_get_opcode(bh) == I2400M_BRH_SIGNED_JUMP) { | |
708 | /* Secure boot needs to stop here */ | |
709 | d_printf(5, dev, "signed jump found @%zu\n", offset); | |
710 | break; | |
711 | } | |
712 | if (offset + section_size == bcf_len) | |
713 | /* Non-secure boot stops here */ | |
714 | break; | |
715 | if (offset + section_size > bcf_len) { | |
716 | dev_err(dev, "fw %s: bad section #%zu, " | |
717 | "end (@%zu) beyond EOF (@%zu)\n", | |
1039abbc | 718 | i2400m->fw_name, section, |
467cc396 IPG |
719 | offset + section_size, bcf_len); |
720 | ret = -EINVAL; | |
721 | goto error_section_beyond_eof; | |
722 | } | |
723 | __i2400m_msleep(20); | |
724 | ret = i2400m_bm_cmd(i2400m, bh, section_size, | |
725 | &ack, sizeof(ack), I2400M_BM_CMD_RAW); | |
726 | if (ret < 0) { | |
727 | dev_err(dev, "fw %s: section #%zu (@%zu %zu B) " | |
1039abbc | 728 | "failed %d\n", i2400m->fw_name, section, |
467cc396 IPG |
729 | offset, sizeof(*bh) + data_size, (int) ret); |
730 | goto error_send; | |
731 | } | |
732 | offset += section_size; | |
733 | section++; | |
734 | } | |
735 | ret = offset; | |
736 | error_section_beyond_eof: | |
737 | error_send: | |
738 | d_fnend(3, dev, "(i2400m %p bcf %p bcf_len %zu) = %d\n", | |
739 | i2400m, bcf, bcf_len, (int) ret); | |
740 | return ret; | |
741 | } | |
742 | ||
743 | ||
32742e61 IPG |
744 | /* |
745 | * Indicate if the device emitted a reboot barker that indicates | |
746 | * "signed boot" | |
747 | */ | |
748 | static | |
749 | unsigned i2400m_boot_is_signed(struct i2400m *i2400m) | |
750 | { | |
751 | return likely(i2400m->sboot); | |
752 | } | |
753 | ||
754 | ||
467cc396 IPG |
755 | /* |
756 | * Do the final steps of uploading firmware | |
757 | * | |
758 | * Depending on the boot mode (signed vs non-signed), different | |
759 | * actions need to be taken. | |
760 | */ | |
761 | static | |
762 | int i2400m_dnload_finalize(struct i2400m *i2400m, | |
763 | const struct i2400m_bcf_hdr *bcf, size_t offset) | |
764 | { | |
765 | int ret = 0; | |
766 | struct device *dev = i2400m_dev(i2400m); | |
767 | struct i2400m_bootrom_header *cmd, ack; | |
768 | struct { | |
769 | struct i2400m_bootrom_header cmd; | |
770 | u8 cmd_pl[0]; | |
771 | } __attribute__((packed)) *cmd_buf; | |
772 | size_t signature_block_offset, signature_block_size; | |
773 | ||
774 | d_fnstart(3, dev, "offset %zu\n", offset); | |
775 | cmd = (void *) bcf + offset; | |
32742e61 | 776 | if (i2400m_boot_is_signed(i2400m) == 0) { |
467cc396 | 777 | struct i2400m_bootrom_header jump_ack; |
ead68239 | 778 | d_printf(1, dev, "unsecure boot, jumping to 0x%08x\n", |
467cc396 | 779 | le32_to_cpu(cmd->target_addr)); |
8d8fe198 CK |
780 | cmd_buf = i2400m->bm_cmd_buf; |
781 | memcpy(&cmd_buf->cmd, cmd, sizeof(*cmd)); | |
782 | cmd = &cmd_buf->cmd; | |
783 | /* now cmd points to the actual bootrom_header in cmd_buf */ | |
467cc396 IPG |
784 | i2400m_brh_set_opcode(cmd, I2400M_BRH_JUMP); |
785 | cmd->data_size = 0; | |
786 | ret = i2400m_bm_cmd(i2400m, cmd, sizeof(*cmd), | |
787 | &jump_ack, sizeof(jump_ack), 0); | |
788 | } else { | |
ead68239 | 789 | d_printf(1, dev, "secure boot, jumping to 0x%08x\n", |
467cc396 IPG |
790 | le32_to_cpu(cmd->target_addr)); |
791 | cmd_buf = i2400m->bm_cmd_buf; | |
792 | memcpy(&cmd_buf->cmd, cmd, sizeof(*cmd)); | |
793 | signature_block_offset = | |
794 | sizeof(*bcf) | |
795 | + le32_to_cpu(bcf->key_size) * sizeof(u32) | |
796 | + le32_to_cpu(bcf->exponent_size) * sizeof(u32); | |
797 | signature_block_size = | |
798 | le32_to_cpu(bcf->modulus_size) * sizeof(u32); | |
799 | memcpy(cmd_buf->cmd_pl, (void *) bcf + signature_block_offset, | |
800 | signature_block_size); | |
801 | ret = i2400m_bm_cmd(i2400m, &cmd_buf->cmd, | |
802 | sizeof(cmd_buf->cmd) + signature_block_size, | |
803 | &ack, sizeof(ack), I2400M_BM_CMD_RAW); | |
804 | } | |
805 | d_fnend(3, dev, "returning %d\n", ret); | |
806 | return ret; | |
807 | } | |
808 | ||
809 | ||
810 | /** | |
811 | * i2400m_bootrom_init - Reboots a powered device into boot mode | |
812 | * | |
813 | * @i2400m: device descriptor | |
814 | * @flags: | |
815 | * I2400M_BRI_SOFT: a reboot notification has been seen | |
816 | * already, so don't wait for it. | |
817 | * | |
818 | * I2400M_BRI_NO_REBOOT: Don't send a reboot command, but wait | |
819 | * for a reboot barker notification. This is a one shot; if | |
820 | * the state machine needs to send a reboot command it will. | |
821 | * | |
822 | * Returns: | |
823 | * | |
824 | * < 0 errno code on error, 0 if ok. | |
825 | * | |
467cc396 IPG |
826 | * Description: |
827 | * | |
828 | * Tries hard enough to put the device in boot-mode. There are two | |
829 | * main phases to this: | |
830 | * | |
831 | * a. (1) send a reboot command and (2) get a reboot barker | |
832 | * b. (1) ack the reboot sending a reboot barker and (2) getting an | |
833 | * ack barker in return | |
834 | * | |
835 | * We want to skip (a) in some cases [soft]. The state machine is | |
836 | * horrible, but it is basically: on each phase, send what has to be | |
837 | * sent (if any), wait for the answer and act on the answer. We might | |
838 | * have to backtrack and retry, so we keep a max tries counter for | |
839 | * that. | |
840 | * | |
841 | * If we get a timeout after sending a warm reset, we do it again. | |
842 | */ | |
843 | int i2400m_bootrom_init(struct i2400m *i2400m, enum i2400m_bri flags) | |
844 | { | |
845 | int result; | |
846 | struct device *dev = i2400m_dev(i2400m); | |
847 | struct i2400m_bootrom_header *cmd; | |
848 | struct i2400m_bootrom_header ack; | |
c3083658 | 849 | int count = i2400m->bus_bm_retries; |
467cc396 IPG |
850 | int ack_timeout_cnt = 1; |
851 | ||
aba3792a | 852 | BUILD_BUG_ON(sizeof(*cmd) != sizeof(i2400m_barker_db[0].data)); |
467cc396 IPG |
853 | BUILD_BUG_ON(sizeof(ack) != sizeof(i2400m_ACK_BARKER)); |
854 | ||
855 | d_fnstart(4, dev, "(i2400m %p flags 0x%08x)\n", i2400m, flags); | |
856 | result = -ENOMEM; | |
857 | cmd = i2400m->bm_cmd_buf; | |
858 | if (flags & I2400M_BRI_SOFT) | |
859 | goto do_reboot_ack; | |
860 | do_reboot: | |
861 | if (--count < 0) | |
862 | goto error_timeout; | |
863 | d_printf(4, dev, "device reboot: reboot command [%d # left]\n", | |
864 | count); | |
865 | if ((flags & I2400M_BRI_NO_REBOOT) == 0) | |
866 | i2400m->bus_reset(i2400m, I2400M_RT_WARM); | |
867 | result = i2400m_bm_cmd(i2400m, NULL, 0, &ack, sizeof(ack), | |
868 | I2400M_BM_CMD_RAW); | |
869 | flags &= ~I2400M_BRI_NO_REBOOT; | |
870 | switch (result) { | |
871 | case -ERESTARTSYS: | |
872 | d_printf(4, dev, "device reboot: got reboot barker\n"); | |
873 | break; | |
874 | case -EISCONN: /* we don't know how it got here...but we follow it */ | |
875 | d_printf(4, dev, "device reboot: got ack barker - whatever\n"); | |
876 | goto do_reboot; | |
877 | case -ETIMEDOUT: /* device has timed out, we might be in boot | |
878 | * mode already and expecting an ack, let's try | |
879 | * that */ | |
aba3792a IPG |
880 | if (i2400m->barker == NULL) { |
881 | dev_info(dev, "warm reset timed out, unknown barker " | |
882 | "type, rebooting\n"); | |
883 | goto do_reboot; | |
884 | } else { | |
885 | dev_info(dev, "warm reset timed out, trying an ack\n"); | |
886 | goto do_reboot_ack; | |
887 | } | |
467cc396 IPG |
888 | case -EPROTO: |
889 | case -ESHUTDOWN: /* dev is gone */ | |
890 | case -EINTR: /* user cancelled */ | |
891 | goto error_dev_gone; | |
892 | default: | |
893 | dev_err(dev, "device reboot: error %d while waiting " | |
894 | "for reboot barker - rebooting\n", result); | |
895 | goto do_reboot; | |
896 | } | |
897 | /* At this point we ack back with 4 REBOOT barkers and expect | |
898 | * 4 ACK barkers. This is ugly, as we send a raw command -- | |
899 | * hence the cast. _bm_cmd() will catch the reboot ack | |
900 | * notification and report it as -EISCONN. */ | |
901 | do_reboot_ack: | |
902 | d_printf(4, dev, "device reboot ack: sending ack [%d # left]\n", count); | |
aba3792a | 903 | memcpy(cmd, i2400m->barker->data, sizeof(i2400m->barker->data)); |
467cc396 IPG |
904 | result = i2400m_bm_cmd(i2400m, cmd, sizeof(*cmd), |
905 | &ack, sizeof(ack), I2400M_BM_CMD_RAW); | |
906 | switch (result) { | |
907 | case -ERESTARTSYS: | |
908 | d_printf(4, dev, "reboot ack: got reboot barker - retrying\n"); | |
909 | if (--count < 0) | |
910 | goto error_timeout; | |
911 | goto do_reboot_ack; | |
912 | case -EISCONN: | |
913 | d_printf(4, dev, "reboot ack: got ack barker - good\n"); | |
914 | break; | |
915 | case -ETIMEDOUT: /* no response, maybe it is the other type? */ | |
aba3792a IPG |
916 | if (ack_timeout_cnt-- < 0) { |
917 | d_printf(4, dev, "reboot ack timedout: retrying\n"); | |
467cc396 IPG |
918 | goto do_reboot_ack; |
919 | } else { | |
920 | dev_err(dev, "reboot ack timedout too long: " | |
921 | "trying reboot\n"); | |
922 | goto do_reboot; | |
923 | } | |
924 | break; | |
925 | case -EPROTO: | |
926 | case -ESHUTDOWN: /* dev is gone */ | |
927 | goto error_dev_gone; | |
928 | default: | |
929 | dev_err(dev, "device reboot ack: error %d while waiting for " | |
930 | "reboot ack barker - rebooting\n", result); | |
931 | goto do_reboot; | |
932 | } | |
933 | d_printf(2, dev, "device reboot ack: got ack barker - boot done\n"); | |
934 | result = 0; | |
935 | exit_timeout: | |
936 | error_dev_gone: | |
937 | d_fnend(4, dev, "(i2400m %p flags 0x%08x) = %d\n", | |
938 | i2400m, flags, result); | |
939 | return result; | |
940 | ||
941 | error_timeout: | |
6e053d6c | 942 | dev_err(dev, "Timed out waiting for reboot ack\n"); |
467cc396 IPG |
943 | result = -ETIMEDOUT; |
944 | goto exit_timeout; | |
945 | } | |
946 | ||
947 | ||
948 | /* | |
949 | * Read the MAC addr | |
950 | * | |
951 | * The position this function reads is fixed in device memory and | |
952 | * always available, even without firmware. | |
953 | * | |
954 | * Note we specify we want to read only six bytes, but provide space | |
955 | * for 16, as we always get it rounded up. | |
956 | */ | |
957 | int i2400m_read_mac_addr(struct i2400m *i2400m) | |
958 | { | |
959 | int result; | |
960 | struct device *dev = i2400m_dev(i2400m); | |
961 | struct net_device *net_dev = i2400m->wimax_dev.net_dev; | |
962 | struct i2400m_bootrom_header *cmd; | |
963 | struct { | |
964 | struct i2400m_bootrom_header ack; | |
965 | u8 ack_pl[16]; | |
966 | } __attribute__((packed)) ack_buf; | |
967 | ||
968 | d_fnstart(5, dev, "(i2400m %p)\n", i2400m); | |
969 | cmd = i2400m->bm_cmd_buf; | |
970 | cmd->command = i2400m_brh_command(I2400M_BRH_READ, 0, 1); | |
971 | cmd->target_addr = cpu_to_le32(0x00203fe8); | |
972 | cmd->data_size = cpu_to_le32(6); | |
973 | result = i2400m_bm_cmd(i2400m, cmd, sizeof(*cmd), | |
974 | &ack_buf.ack, sizeof(ack_buf), 0); | |
975 | if (result < 0) { | |
976 | dev_err(dev, "BM: read mac addr failed: %d\n", result); | |
977 | goto error_read_mac; | |
978 | } | |
979 | d_printf(2, dev, | |
980 | "mac addr is %02x:%02x:%02x:%02x:%02x:%02x\n", | |
981 | ack_buf.ack_pl[0], ack_buf.ack_pl[1], | |
982 | ack_buf.ack_pl[2], ack_buf.ack_pl[3], | |
983 | ack_buf.ack_pl[4], ack_buf.ack_pl[5]); | |
984 | if (i2400m->bus_bm_mac_addr_impaired == 1) { | |
985 | ack_buf.ack_pl[0] = 0x00; | |
986 | ack_buf.ack_pl[1] = 0x16; | |
987 | ack_buf.ack_pl[2] = 0xd3; | |
988 | get_random_bytes(&ack_buf.ack_pl[3], 3); | |
989 | dev_err(dev, "BM is MAC addr impaired, faking MAC addr to " | |
990 | "mac addr is %02x:%02x:%02x:%02x:%02x:%02x\n", | |
991 | ack_buf.ack_pl[0], ack_buf.ack_pl[1], | |
992 | ack_buf.ack_pl[2], ack_buf.ack_pl[3], | |
993 | ack_buf.ack_pl[4], ack_buf.ack_pl[5]); | |
994 | result = 0; | |
995 | } | |
996 | net_dev->addr_len = ETH_ALEN; | |
997 | memcpy(net_dev->perm_addr, ack_buf.ack_pl, ETH_ALEN); | |
998 | memcpy(net_dev->dev_addr, ack_buf.ack_pl, ETH_ALEN); | |
999 | error_read_mac: | |
1000 | d_fnend(5, dev, "(i2400m %p) = %d\n", i2400m, result); | |
1001 | return result; | |
1002 | } | |
1003 | ||
1004 | ||
1005 | /* | |
1006 | * Initialize a non signed boot | |
1007 | * | |
1008 | * This implies sending some magic values to the device's memory. Note | |
1009 | * we convert the values to little endian in the same array | |
1010 | * declaration. | |
1011 | */ | |
1012 | static | |
1013 | int i2400m_dnload_init_nonsigned(struct i2400m *i2400m) | |
1014 | { | |
7308a0c2 DB |
1015 | unsigned i = 0; |
1016 | int ret = 0; | |
467cc396 | 1017 | struct device *dev = i2400m_dev(i2400m); |
467cc396 | 1018 | d_fnstart(5, dev, "(i2400m %p)\n", i2400m); |
7308a0c2 DB |
1019 | if (i2400m->bus_bm_pokes_table) { |
1020 | while (i2400m->bus_bm_pokes_table[i].address) { | |
1021 | ret = i2400m_download_chunk( | |
1022 | i2400m, | |
1023 | &i2400m->bus_bm_pokes_table[i].data, | |
1024 | sizeof(i2400m->bus_bm_pokes_table[i].data), | |
1025 | i2400m->bus_bm_pokes_table[i].address, 1, 1); | |
1026 | if (ret < 0) | |
1027 | break; | |
1028 | i++; | |
1029 | } | |
467cc396 IPG |
1030 | } |
1031 | d_fnend(5, dev, "(i2400m %p) = %d\n", i2400m, ret); | |
1032 | return ret; | |
1033 | } | |
1034 | ||
1035 | ||
1036 | /* | |
1037 | * Initialize the signed boot process | |
1038 | * | |
1039 | * @i2400m: device descriptor | |
1040 | * | |
1041 | * @bcf_hdr: pointer to the firmware header; assumes it is fully in | |
1042 | * memory (it has gone through basic validation). | |
1043 | * | |
1044 | * Returns: 0 if ok, < 0 errno code on error, -ERESTARTSYS if the hw | |
1045 | * rebooted. | |
1046 | * | |
1047 | * This writes the firmware BCF header to the device using the | |
1048 | * HASH_PAYLOAD_ONLY command. | |
1049 | */ | |
1050 | static | |
1051 | int i2400m_dnload_init_signed(struct i2400m *i2400m, | |
1052 | const struct i2400m_bcf_hdr *bcf_hdr) | |
1053 | { | |
1054 | int ret; | |
1055 | struct device *dev = i2400m_dev(i2400m); | |
1056 | struct { | |
1057 | struct i2400m_bootrom_header cmd; | |
1058 | struct i2400m_bcf_hdr cmd_pl; | |
1059 | } __attribute__((packed)) *cmd_buf; | |
1060 | struct i2400m_bootrom_header ack; | |
1061 | ||
1062 | d_fnstart(5, dev, "(i2400m %p bcf_hdr %p)\n", i2400m, bcf_hdr); | |
1063 | cmd_buf = i2400m->bm_cmd_buf; | |
1064 | cmd_buf->cmd.command = | |
1065 | i2400m_brh_command(I2400M_BRH_HASH_PAYLOAD_ONLY, 0, 0); | |
1066 | cmd_buf->cmd.target_addr = 0; | |
1067 | cmd_buf->cmd.data_size = cpu_to_le32(sizeof(cmd_buf->cmd_pl)); | |
1068 | memcpy(&cmd_buf->cmd_pl, bcf_hdr, sizeof(*bcf_hdr)); | |
1069 | ret = i2400m_bm_cmd(i2400m, &cmd_buf->cmd, sizeof(*cmd_buf), | |
1070 | &ack, sizeof(ack), 0); | |
1071 | if (ret >= 0) | |
1072 | ret = 0; | |
1073 | d_fnend(5, dev, "(i2400m %p bcf_hdr %p) = %d\n", i2400m, bcf_hdr, ret); | |
1074 | return ret; | |
1075 | } | |
1076 | ||
1077 | ||
1078 | /* | |
1079 | * Initialize the firmware download at the device size | |
1080 | * | |
1081 | * Multiplex to the one that matters based on the device's mode | |
1082 | * (signed or non-signed). | |
1083 | */ | |
1084 | static | |
1085 | int i2400m_dnload_init(struct i2400m *i2400m, const struct i2400m_bcf_hdr *bcf) | |
1086 | { | |
1087 | int result; | |
1088 | struct device *dev = i2400m_dev(i2400m); | |
467cc396 | 1089 | |
32742e61 IPG |
1090 | if (i2400m_boot_is_signed(i2400m)) { |
1091 | d_printf(1, dev, "signed boot\n"); | |
1092 | result = i2400m_dnload_init_signed(i2400m, bcf); | |
467cc396 IPG |
1093 | if (result == -ERESTARTSYS) |
1094 | return result; | |
1095 | if (result < 0) | |
32742e61 | 1096 | dev_err(dev, "firmware %s: signed boot download " |
467cc396 | 1097 | "initialization failed: %d\n", |
1039abbc | 1098 | i2400m->fw_name, result); |
32742e61 IPG |
1099 | } else { |
1100 | /* non-signed boot process without pokes */ | |
1101 | d_printf(1, dev, "non-signed boot\n"); | |
1102 | result = i2400m_dnload_init_nonsigned(i2400m); | |
467cc396 IPG |
1103 | if (result == -ERESTARTSYS) |
1104 | return result; | |
1105 | if (result < 0) | |
32742e61 | 1106 | dev_err(dev, "firmware %s: non-signed download " |
467cc396 | 1107 | "initialization failed: %d\n", |
1039abbc | 1108 | i2400m->fw_name, result); |
467cc396 IPG |
1109 | } |
1110 | return result; | |
1111 | } | |
1112 | ||
1113 | ||
1114 | /* | |
1115 | * Run quick consistency tests on the firmware file | |
1116 | * | |
1117 | * Check for the firmware being made for the i2400m device, | |
1118 | * etc...These checks are mostly informative, as the device will make | |
1119 | * them too; but the driver's response is more informative on what | |
1120 | * went wrong. | |
1121 | */ | |
1122 | static | |
1123 | int i2400m_fw_check(struct i2400m *i2400m, | |
1124 | const struct i2400m_bcf_hdr *bcf, | |
1125 | size_t bcf_size) | |
1126 | { | |
1127 | int result; | |
1128 | struct device *dev = i2400m_dev(i2400m); | |
1129 | unsigned module_type, header_len, major_version, minor_version, | |
1130 | module_id, module_vendor, date, size; | |
1131 | ||
1132 | /* Check hard errors */ | |
1133 | result = -EINVAL; | |
1134 | if (bcf_size < sizeof(*bcf)) { /* big enough header? */ | |
1135 | dev_err(dev, "firmware %s too short: " | |
1136 | "%zu B vs %zu (at least) expected\n", | |
1039abbc | 1137 | i2400m->fw_name, bcf_size, sizeof(*bcf)); |
467cc396 IPG |
1138 | goto error; |
1139 | } | |
1140 | ||
1141 | module_type = bcf->module_type; | |
1142 | header_len = sizeof(u32) * le32_to_cpu(bcf->header_len); | |
1143 | major_version = le32_to_cpu(bcf->header_version) & 0xffff0000 >> 16; | |
1144 | minor_version = le32_to_cpu(bcf->header_version) & 0x0000ffff; | |
1145 | module_id = le32_to_cpu(bcf->module_id); | |
1146 | module_vendor = le32_to_cpu(bcf->module_vendor); | |
1147 | date = le32_to_cpu(bcf->date); | |
1148 | size = sizeof(u32) * le32_to_cpu(bcf->size); | |
1149 | ||
1150 | if (bcf_size != size) { /* annoyingly paranoid */ | |
1151 | dev_err(dev, "firmware %s: bad size, got " | |
1152 | "%zu B vs %u expected\n", | |
1039abbc | 1153 | i2400m->fw_name, bcf_size, size); |
467cc396 IPG |
1154 | goto error; |
1155 | } | |
1156 | ||
1157 | d_printf(2, dev, "type 0x%x id 0x%x vendor 0x%x; header v%u.%u (%zu B) " | |
1158 | "date %08x (%zu B)\n", | |
1159 | module_type, module_id, module_vendor, | |
1160 | major_version, minor_version, (size_t) header_len, | |
1161 | date, (size_t) size); | |
1162 | ||
1163 | if (module_type != 6) { /* built for the right hardware? */ | |
1164 | dev_err(dev, "bad fw %s: unexpected module type 0x%x; " | |
1039abbc | 1165 | "aborting\n", i2400m->fw_name, module_type); |
467cc396 IPG |
1166 | goto error; |
1167 | } | |
1168 | ||
1169 | /* Check soft-er errors */ | |
1170 | result = 0; | |
1171 | if (module_vendor != 0x8086) | |
1172 | dev_err(dev, "bad fw %s? unexpected vendor 0x%04x\n", | |
1039abbc | 1173 | i2400m->fw_name, module_vendor); |
467cc396 IPG |
1174 | if (date < 0x20080300) |
1175 | dev_err(dev, "bad fw %s? build date too old %08x\n", | |
1039abbc | 1176 | i2400m->fw_name, date); |
467cc396 IPG |
1177 | error: |
1178 | return result; | |
1179 | } | |
1180 | ||
1181 | ||
1182 | /* | |
1183 | * Download the firmware to the device | |
1184 | * | |
1185 | * @i2400m: device descriptor | |
1186 | * @bcf: pointer to loaded (and minimally verified for consistency) | |
1187 | * firmware | |
1188 | * @bcf_size: size of the @bcf buffer (header plus payloads) | |
1189 | * | |
1190 | * The process for doing this is described in this file's header. | |
1191 | * | |
1192 | * Note we only reinitialize boot-mode if the flags say so. Some hw | |
1193 | * iterations need it, some don't. In any case, if we loop, we always | |
1194 | * need to reinitialize the boot room, hence the flags modification. | |
1195 | */ | |
1196 | static | |
1197 | int i2400m_fw_dnload(struct i2400m *i2400m, const struct i2400m_bcf_hdr *bcf, | |
1198 | size_t bcf_size, enum i2400m_bri flags) | |
1199 | { | |
1200 | int ret = 0; | |
1201 | struct device *dev = i2400m_dev(i2400m); | |
ecddfd5e | 1202 | int count = i2400m->bus_bm_retries; |
467cc396 IPG |
1203 | |
1204 | d_fnstart(5, dev, "(i2400m %p bcf %p size %zu)\n", | |
1205 | i2400m, bcf, bcf_size); | |
1206 | i2400m->boot_mode = 1; | |
b4013f91 | 1207 | wmb(); /* Make sure other readers see it */ |
467cc396 IPG |
1208 | hw_reboot: |
1209 | if (count-- == 0) { | |
1210 | ret = -ERESTARTSYS; | |
1211 | dev_err(dev, "device rebooted too many times, aborting\n"); | |
1212 | goto error_too_many_reboots; | |
1213 | } | |
1214 | if (flags & I2400M_BRI_MAC_REINIT) { | |
1215 | ret = i2400m_bootrom_init(i2400m, flags); | |
1216 | if (ret < 0) { | |
1217 | dev_err(dev, "bootrom init failed: %d\n", ret); | |
1218 | goto error_bootrom_init; | |
1219 | } | |
1220 | } | |
1221 | flags |= I2400M_BRI_MAC_REINIT; | |
1222 | ||
1223 | /* | |
1224 | * Initialize the download, push the bytes to the device and | |
1225 | * then jump to the new firmware. Note @ret is passed with the | |
1226 | * offset of the jump instruction to _dnload_finalize() | |
1227 | */ | |
1228 | ret = i2400m_dnload_init(i2400m, bcf); /* Init device's dnload */ | |
1229 | if (ret == -ERESTARTSYS) | |
1230 | goto error_dev_rebooted; | |
1231 | if (ret < 0) | |
1232 | goto error_dnload_init; | |
1233 | ||
1234 | ret = i2400m_dnload_bcf(i2400m, bcf, bcf_size); | |
1235 | if (ret == -ERESTARTSYS) | |
1236 | goto error_dev_rebooted; | |
1237 | if (ret < 0) { | |
1238 | dev_err(dev, "fw %s: download failed: %d\n", | |
1039abbc | 1239 | i2400m->fw_name, ret); |
467cc396 IPG |
1240 | goto error_dnload_bcf; |
1241 | } | |
1242 | ||
1243 | ret = i2400m_dnload_finalize(i2400m, bcf, ret); | |
1244 | if (ret == -ERESTARTSYS) | |
1245 | goto error_dev_rebooted; | |
1246 | if (ret < 0) { | |
1247 | dev_err(dev, "fw %s: " | |
1248 | "download finalization failed: %d\n", | |
1039abbc | 1249 | i2400m->fw_name, ret); |
467cc396 IPG |
1250 | goto error_dnload_finalize; |
1251 | } | |
1252 | ||
1253 | d_printf(2, dev, "fw %s successfully uploaded\n", | |
1039abbc | 1254 | i2400m->fw_name); |
467cc396 | 1255 | i2400m->boot_mode = 0; |
b4013f91 | 1256 | wmb(); /* Make sure i2400m_msg_to_dev() sees boot_mode */ |
467cc396 IPG |
1257 | error_dnload_finalize: |
1258 | error_dnload_bcf: | |
1259 | error_dnload_init: | |
1260 | error_bootrom_init: | |
1261 | error_too_many_reboots: | |
1262 | d_fnend(5, dev, "(i2400m %p bcf %p size %zu) = %d\n", | |
1263 | i2400m, bcf, bcf_size, ret); | |
1264 | return ret; | |
1265 | ||
1266 | error_dev_rebooted: | |
1267 | dev_err(dev, "device rebooted, %d tries left\n", count); | |
1268 | /* we got the notification already, no need to wait for it again */ | |
1269 | flags |= I2400M_BRI_SOFT; | |
1270 | goto hw_reboot; | |
1271 | } | |
1272 | ||
1273 | ||
1274 | /** | |
1275 | * i2400m_dev_bootstrap - Bring the device to a known state and upload firmware | |
1276 | * | |
1277 | * @i2400m: device descriptor | |
1278 | * | |
1279 | * Returns: >= 0 if ok, < 0 errno code on error. | |
1280 | * | |
1281 | * This sets up the firmware upload environment, loads the firmware | |
1282 | * file from disk, verifies and then calls the firmware upload process | |
1283 | * per se. | |
1284 | * | |
1285 | * Can be called either from probe, or after a warm reset. Can not be | |
1286 | * called from within an interrupt. All the flow in this code is | |
1287 | * single-threade; all I/Os are synchronous. | |
1288 | */ | |
1289 | int i2400m_dev_bootstrap(struct i2400m *i2400m, enum i2400m_bri flags) | |
1290 | { | |
ebc5f62b | 1291 | int ret, itr; |
467cc396 IPG |
1292 | struct device *dev = i2400m_dev(i2400m); |
1293 | const struct firmware *fw; | |
1294 | const struct i2400m_bcf_hdr *bcf; /* Firmware data */ | |
1039abbc | 1295 | const char *fw_name; |
467cc396 IPG |
1296 | |
1297 | d_fnstart(5, dev, "(i2400m %p)\n", i2400m); | |
1039abbc | 1298 | |
467cc396 | 1299 | /* Load firmware files to memory. */ |
ebc5f62b | 1300 | for (itr = 0, bcf = NULL, ret = -ENOENT; ; itr++) { |
1039abbc IPG |
1301 | fw_name = i2400m->bus_fw_names[itr]; |
1302 | if (fw_name == NULL) { | |
1303 | dev_err(dev, "Could not find a usable firmware image\n"); | |
1304 | ret = -ENOENT; | |
ebc5f62b | 1305 | break; |
1039abbc | 1306 | } |
ebc5f62b | 1307 | d_printf(1, dev, "trying firmware %s (%d)\n", fw_name, itr); |
1039abbc | 1308 | ret = request_firmware(&fw, fw_name, dev); |
ebc5f62b | 1309 | if (ret < 0) { |
1039abbc IPG |
1310 | dev_err(dev, "fw %s: cannot load file: %d\n", |
1311 | fw_name, ret); | |
ebc5f62b IPG |
1312 | continue; |
1313 | } | |
1314 | bcf = (void *) fw->data; | |
1315 | i2400m->fw_name = fw_name; | |
1316 | ret = i2400m_fw_check(i2400m, bcf, fw->size); | |
1317 | if (ret >= 0) { | |
1318 | ret = i2400m_fw_dnload(i2400m, bcf, fw->size, flags); | |
1319 | if (ret >= 0) | |
1320 | break; | |
1321 | } else | |
1322 | dev_err(dev, "%s: cannot use, skipping\n", fw_name); | |
1323 | release_firmware(fw); | |
467cc396 | 1324 | } |
467cc396 IPG |
1325 | d_fnend(5, dev, "(i2400m %p) = %d\n", i2400m, ret); |
1326 | return ret; | |
1327 | } | |
1328 | EXPORT_SYMBOL_GPL(i2400m_dev_bootstrap); |