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hermes_dld.c
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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 <[email protected]>
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
96 dblock_addr(const struct dblock *blk)
97 {
98  return le32_to_cpu(blk->addr);
99 }
100 
101 static inline u32
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
110 pdr_id(const struct pdr *pdr)
111 {
112  return le32_to_cpu(pdr->id);
113 }
114 
115 static inline u32
116 pdr_addr(const struct pdr *pdr)
117 {
118  return le32_to_cpu(pdr->addr);
119 }
120 
121 static inline u32
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
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
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 *
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 *
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
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  */
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
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 */
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  */
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 }