1 /*
2 * Hermes download helper.
3 *
4 * This helper:
5 * - is capable of writing to the volatile area of the hermes device
6 * - is currently not capable of writing to non-volatile areas
7 * - provide helpers to identify and update plugin data
8 * - is not capable of interpreting a fw image directly. That is up to
9 * the main card driver.
10 * - deals with Hermes I devices. It can probably be modified to deal
11 * with Hermes II devices
12 *
13 * Copyright (C) 2007, David Kilroy
14 *
15 * Plug data code slightly modified from spectrum_cs driver
16 * Copyright (C) 2002-2005 Pavel Roskin <proski@gnu.org>
17 * Portions based on information in wl_lkm_718 Agere driver
18 * COPYRIGHT (C) 2001-2004 by Agere Systems Inc. All Rights Reserved
19 *
20 * The contents of this file are subject to the Mozilla Public License
21 * Version 1.1 (the "License"); you may not use this file except in
22 * compliance with the License. You may obtain a copy of the License
23 * at http://www.mozilla.org/MPL/
24 *
25 * Software distributed under the License is distributed on an "AS IS"
26 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
27 * the License for the specific language governing rights and
28 * limitations under the License.
29 *
30 * Alternatively, the contents of this file may be used under the
31 * terms of the GNU General Public License version 2 (the "GPL"), in
32 * which case the provisions of the GPL are applicable instead of the
33 * above. If you wish to allow the use of your version of this file
34 * only under the terms of the GPL and not to allow others to use your
35 * version of this file under the MPL, indicate your decision by
36 * deleting the provisions above and replace them with the notice and
37 * other provisions required by the GPL. If you do not delete the
38 * provisions above, a recipient may use your version of this file
39 * under either the MPL or the GPL.
40 */
41
42 #include <linux/module.h>
43 #include <linux/delay.h>
44 #include "hermes.h"
45 #include "hermes_dld.h"
46
47 #define PFX "hermes_dld: "
48
49 /* End markers used in dblocks */
50 #define PDI_END 0x00000000 /* End of PDA */
51 #define BLOCK_END 0xFFFFFFFF /* Last image block */
52 #define TEXT_END 0x1A /* End of text header */
53
54 /*
55 * The following structures have little-endian fields denoted by
56 * the leading underscore. Don't access them directly - use inline
57 * functions defined below.
58 */
59
60 /*
61 * The binary image to be downloaded consists of series of data blocks.
62 * Each block has the following structure.
63 */
64 struct dblock {
65 __le32 addr; /* adapter address where to write the block */
66 __le16 len; /* length of the data only, in bytes */
67 char data[0]; /* data to be written */
68 } __packed;
69
70 /*
71 * Plug Data References are located in the image after the last data
72 * block. They refer to areas in the adapter memory where the plug data
73 * items with matching ID should be written.
74 */
75 struct pdr {
76 __le32 id; /* record ID */
77 __le32 addr; /* adapter address where to write the data */
78 __le32 len; /* expected length of the data, in bytes */
79 char next[0]; /* next PDR starts here */
80 } __packed;
81
82 /*
83 * Plug Data Items are located in the EEPROM read from the adapter by
84 * primary firmware. They refer to the device-specific data that should
85 * be plugged into the secondary firmware.
86 */
87 struct pdi {
88 __le16 len; /* length of ID and data, in words */
89 __le16 id; /* record ID */
90 char data[0]; /* plug data */
91 } __packed;
92
93 /*** FW data block access functions ***/
94
95 static inline u32
dblock_addr(const struct dblock * blk)96 dblock_addr(const struct dblock *blk)
97 {
98 return le32_to_cpu(blk->addr);
99 }
100
101 static inline u32
dblock_len(const struct dblock * blk)102 dblock_len(const struct dblock *blk)
103 {
104 return le16_to_cpu(blk->len);
105 }
106
107 /*** PDR Access functions ***/
108
109 static inline u32
pdr_id(const struct pdr * pdr)110 pdr_id(const struct pdr *pdr)
111 {
112 return le32_to_cpu(pdr->id);
113 }
114
115 static inline u32
pdr_addr(const struct pdr * pdr)116 pdr_addr(const struct pdr *pdr)
117 {
118 return le32_to_cpu(pdr->addr);
119 }
120
121 static inline u32
pdr_len(const struct pdr * pdr)122 pdr_len(const struct pdr *pdr)
123 {
124 return le32_to_cpu(pdr->len);
125 }
126
127 /*** PDI Access functions ***/
128
129 static inline u32
pdi_id(const struct pdi * pdi)130 pdi_id(const struct pdi *pdi)
131 {
132 return le16_to_cpu(pdi->id);
133 }
134
135 /* Return length of the data only, in bytes */
136 static inline u32
pdi_len(const struct pdi * pdi)137 pdi_len(const struct pdi *pdi)
138 {
139 return 2 * (le16_to_cpu(pdi->len) - 1);
140 }
141
142 /*** Plug Data Functions ***/
143
144 /*
145 * Scan PDR for the record with the specified RECORD_ID.
146 * If it's not found, return NULL.
147 */
148 static const struct pdr *
hermes_find_pdr(const struct pdr * first_pdr,u32 record_id,const void * end)149 hermes_find_pdr(const struct pdr *first_pdr, u32 record_id, const void *end)
150 {
151 const struct pdr *pdr = first_pdr;
152
153 end -= sizeof(struct pdr);
154
155 while (((void *) pdr <= end) &&
156 (pdr_id(pdr) != PDI_END)) {
157 /*
158 * PDR area is currently not terminated by PDI_END.
159 * It's followed by CRC records, which have the type
160 * field where PDR has length. The type can be 0 or 1.
161 */
162 if (pdr_len(pdr) < 2)
163 return NULL;
164
165 /* If the record ID matches, we are done */
166 if (pdr_id(pdr) == record_id)
167 return pdr;
168
169 pdr = (struct pdr *) pdr->next;
170 }
171 return NULL;
172 }
173
174 /* Scan production data items for a particular entry */
175 static const struct pdi *
hermes_find_pdi(const struct pdi * first_pdi,u32 record_id,const void * end)176 hermes_find_pdi(const struct pdi *first_pdi, u32 record_id, const void *end)
177 {
178 const struct pdi *pdi = first_pdi;
179
180 end -= sizeof(struct pdi);
181
182 while (((void *) pdi <= end) &&
183 (pdi_id(pdi) != PDI_END)) {
184
185 /* If the record ID matches, we are done */
186 if (pdi_id(pdi) == record_id)
187 return pdi;
188
189 pdi = (struct pdi *) &pdi->data[pdi_len(pdi)];
190 }
191 return NULL;
192 }
193
194 /* Process one Plug Data Item - find corresponding PDR and plug it */
195 static int
hermes_plug_pdi(struct hermes * hw,const struct pdr * first_pdr,const struct pdi * pdi,const void * pdr_end)196 hermes_plug_pdi(struct hermes *hw, const struct pdr *first_pdr,
197 const struct pdi *pdi, const void *pdr_end)
198 {
199 const struct pdr *pdr;
200
201 /* Find the PDR corresponding to this PDI */
202 pdr = hermes_find_pdr(first_pdr, pdi_id(pdi), pdr_end);
203
204 /* No match is found, safe to ignore */
205 if (!pdr)
206 return 0;
207
208 /* Lengths of the data in PDI and PDR must match */
209 if (pdi_len(pdi) != pdr_len(pdr))
210 return -EINVAL;
211
212 /* do the actual plugging */
213 hw->ops->program(hw, pdi->data, pdr_addr(pdr), pdi_len(pdi));
214
215 return 0;
216 }
217
218 /* Parse PDA and write the records into the adapter
219 *
220 * Attempt to write every records that is in the specified pda
221 * which also has a valid production data record for the firmware.
222 */
hermes_apply_pda(struct hermes * hw,const char * first_pdr,const void * pdr_end,const __le16 * pda,const void * pda_end)223 int hermes_apply_pda(struct hermes *hw,
224 const char *first_pdr,
225 const void *pdr_end,
226 const __le16 *pda,
227 const void *pda_end)
228 {
229 int ret;
230 const struct pdi *pdi;
231 const struct pdr *pdr;
232
233 pdr = (const struct pdr *) first_pdr;
234 pda_end -= sizeof(struct pdi);
235
236 /* Go through every PDI and plug them into the adapter */
237 pdi = (const struct pdi *) (pda + 2);
238 while (((void *) pdi <= pda_end) &&
239 (pdi_id(pdi) != PDI_END)) {
240 ret = hermes_plug_pdi(hw, pdr, pdi, pdr_end);
241 if (ret)
242 return ret;
243
244 /* Increment to the next PDI */
245 pdi = (const struct pdi *) &pdi->data[pdi_len(pdi)];
246 }
247 return 0;
248 }
249
250 /* Identify the total number of bytes in all blocks
251 * including the header data.
252 */
253 size_t
hermes_blocks_length(const char * first_block,const void * end)254 hermes_blocks_length(const char *first_block, const void *end)
255 {
256 const struct dblock *blk = (const struct dblock *) first_block;
257 int total_len = 0;
258 int len;
259
260 end -= sizeof(*blk);
261
262 /* Skip all blocks to locate Plug Data References
263 * (Spectrum CS) */
264 while (((void *) blk <= end) &&
265 (dblock_addr(blk) != BLOCK_END)) {
266 len = dblock_len(blk);
267 total_len += sizeof(*blk) + len;
268 blk = (struct dblock *) &blk->data[len];
269 }
270
271 return total_len;
272 }
273
274 /*** Hermes programming ***/
275
276 /* Program the data blocks */
hermes_program(struct hermes * hw,const char * first_block,const void * end)277 int hermes_program(struct hermes *hw, const char *first_block, const void *end)
278 {
279 const struct dblock *blk;
280 u32 blkaddr;
281 u32 blklen;
282 int err = 0;
283
284 blk = (const struct dblock *) first_block;
285
286 if ((void *) blk > (end - sizeof(*blk)))
287 return -EIO;
288
289 blkaddr = dblock_addr(blk);
290 blklen = dblock_len(blk);
291
292 while ((blkaddr != BLOCK_END) &&
293 (((void *) blk + blklen) <= end)) {
294 pr_debug(PFX "Programming block of length %d "
295 "to address 0x%08x\n", blklen, blkaddr);
296
297 err = hw->ops->program(hw, blk->data, blkaddr, blklen);
298 if (err)
299 break;
300
301 blk = (const struct dblock *) &blk->data[blklen];
302
303 if ((void *) blk > (end - sizeof(*blk)))
304 return -EIO;
305
306 blkaddr = dblock_addr(blk);
307 blklen = dblock_len(blk);
308 }
309 return err;
310 }
311
312 /*** Default plugging data for Hermes I ***/
313 /* Values from wl_lkm_718/hcf/dhf.c */
314
315 #define DEFINE_DEFAULT_PDR(pid, length, data) \
316 static const struct { \
317 __le16 len; \
318 __le16 id; \
319 u8 val[length]; \
320 } __packed default_pdr_data_##pid = { \
321 cpu_to_le16((sizeof(default_pdr_data_##pid)/ \
322 sizeof(__le16)) - 1), \
323 cpu_to_le16(pid), \
324 data \
325 }
326
327 #define DEFAULT_PDR(pid) default_pdr_data_##pid
328
329 /* HWIF Compatibility */
330 DEFINE_DEFAULT_PDR(0x0005, 10, "\x00\x00\x06\x00\x01\x00\x01\x00\x01\x00");
331
332 /* PPPPSign */
333 DEFINE_DEFAULT_PDR(0x0108, 4, "\x00\x00\x00\x00");
334
335 /* PPPPProf */
336 DEFINE_DEFAULT_PDR(0x0109, 10, "\x00\x00\x00\x00\x03\x00\x00\x00\x00\x00");
337
338 /* Antenna diversity */
339 DEFINE_DEFAULT_PDR(0x0150, 2, "\x00\x3F");
340
341 /* Modem VCO band Set-up */
342 DEFINE_DEFAULT_PDR(0x0160, 28,
343 "\x00\x00\x00\x00\x00\x00\x00\x00"
344 "\x00\x00\x00\x00\x00\x00\x00\x00"
345 "\x00\x00\x00\x00\x00\x00\x00\x00"
346 "\x00\x00\x00\x00");
347
348 /* Modem Rx Gain Table Values */
349 DEFINE_DEFAULT_PDR(0x0161, 256,
350 "\x3F\x01\x3F\01\x3F\x01\x3F\x01"
351 "\x3F\x01\x3F\01\x3F\x01\x3F\x01"
352 "\x3F\x01\x3F\01\x3F\x01\x3F\x01"
353 "\x3F\x01\x3F\01\x3F\x01\x3F\x01"
354 "\x3F\x01\x3E\01\x3E\x01\x3D\x01"
355 "\x3D\x01\x3C\01\x3C\x01\x3B\x01"
356 "\x3B\x01\x3A\01\x3A\x01\x39\x01"
357 "\x39\x01\x38\01\x38\x01\x37\x01"
358 "\x37\x01\x36\01\x36\x01\x35\x01"
359 "\x35\x01\x34\01\x34\x01\x33\x01"
360 "\x33\x01\x32\x01\x32\x01\x31\x01"
361 "\x31\x01\x30\x01\x30\x01\x7B\x01"
362 "\x7B\x01\x7A\x01\x7A\x01\x79\x01"
363 "\x79\x01\x78\x01\x78\x01\x77\x01"
364 "\x77\x01\x76\x01\x76\x01\x75\x01"
365 "\x75\x01\x74\x01\x74\x01\x73\x01"
366 "\x73\x01\x72\x01\x72\x01\x71\x01"
367 "\x71\x01\x70\x01\x70\x01\x68\x01"
368 "\x68\x01\x67\x01\x67\x01\x66\x01"
369 "\x66\x01\x65\x01\x65\x01\x57\x01"
370 "\x57\x01\x56\x01\x56\x01\x55\x01"
371 "\x55\x01\x54\x01\x54\x01\x53\x01"
372 "\x53\x01\x52\x01\x52\x01\x51\x01"
373 "\x51\x01\x50\x01\x50\x01\x48\x01"
374 "\x48\x01\x47\x01\x47\x01\x46\x01"
375 "\x46\x01\x45\x01\x45\x01\x44\x01"
376 "\x44\x01\x43\x01\x43\x01\x42\x01"
377 "\x42\x01\x41\x01\x41\x01\x40\x01"
378 "\x40\x01\x40\x01\x40\x01\x40\x01"
379 "\x40\x01\x40\x01\x40\x01\x40\x01"
380 "\x40\x01\x40\x01\x40\x01\x40\x01"
381 "\x40\x01\x40\x01\x40\x01\x40\x01");
382
383 /* Write PDA according to certain rules.
384 *
385 * For every production data record, look for a previous setting in
386 * the pda, and use that.
387 *
388 * For certain records, use defaults if they are not found in pda.
389 */
hermes_apply_pda_with_defaults(struct hermes * hw,const char * first_pdr,const void * pdr_end,const __le16 * pda,const void * pda_end)390 int hermes_apply_pda_with_defaults(struct hermes *hw,
391 const char *first_pdr,
392 const void *pdr_end,
393 const __le16 *pda,
394 const void *pda_end)
395 {
396 const struct pdr *pdr = (const struct pdr *) first_pdr;
397 const struct pdi *first_pdi = (const struct pdi *) &pda[2];
398 const struct pdi *pdi;
399 const struct pdi *default_pdi = NULL;
400 const struct pdi *outdoor_pdi;
401 int record_id;
402
403 pdr_end -= sizeof(struct pdr);
404
405 while (((void *) pdr <= pdr_end) &&
406 (pdr_id(pdr) != PDI_END)) {
407 /*
408 * For spectrum_cs firmwares,
409 * PDR area is currently not terminated by PDI_END.
410 * It's followed by CRC records, which have the type
411 * field where PDR has length. The type can be 0 or 1.
412 */
413 if (pdr_len(pdr) < 2)
414 break;
415 record_id = pdr_id(pdr);
416
417 pdi = hermes_find_pdi(first_pdi, record_id, pda_end);
418 if (pdi)
419 pr_debug(PFX "Found record 0x%04x at %p\n",
420 record_id, pdi);
421
422 switch (record_id) {
423 case 0x110: /* Modem REFDAC values */
424 case 0x120: /* Modem VGDAC values */
425 outdoor_pdi = hermes_find_pdi(first_pdi, record_id + 1,
426 pda_end);
427 default_pdi = NULL;
428 if (outdoor_pdi) {
429 pdi = outdoor_pdi;
430 pr_debug(PFX
431 "Using outdoor record 0x%04x at %p\n",
432 record_id + 1, pdi);
433 }
434 break;
435 case 0x5: /* HWIF Compatibility */
436 default_pdi = (struct pdi *) &DEFAULT_PDR(0x0005);
437 break;
438 case 0x108: /* PPPPSign */
439 default_pdi = (struct pdi *) &DEFAULT_PDR(0x0108);
440 break;
441 case 0x109: /* PPPPProf */
442 default_pdi = (struct pdi *) &DEFAULT_PDR(0x0109);
443 break;
444 case 0x150: /* Antenna diversity */
445 default_pdi = (struct pdi *) &DEFAULT_PDR(0x0150);
446 break;
447 case 0x160: /* Modem VCO band Set-up */
448 default_pdi = (struct pdi *) &DEFAULT_PDR(0x0160);
449 break;
450 case 0x161: /* Modem Rx Gain Table Values */
451 default_pdi = (struct pdi *) &DEFAULT_PDR(0x0161);
452 break;
453 default:
454 default_pdi = NULL;
455 break;
456 }
457 if (!pdi && default_pdi) {
458 /* Use default */
459 pdi = default_pdi;
460 pr_debug(PFX "Using default record 0x%04x at %p\n",
461 record_id, pdi);
462 }
463
464 if (pdi) {
465 /* Lengths of the data in PDI and PDR must match */
466 if ((pdi_len(pdi) == pdr_len(pdr)) &&
467 ((void *) pdi->data + pdi_len(pdi) < pda_end)) {
468 /* do the actual plugging */
469 hw->ops->program(hw, pdi->data, pdr_addr(pdr),
470 pdi_len(pdi));
471 }
472 }
473
474 pdr++;
475 }
476 return 0;
477 }
478
