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1da177e4 LT |
1 | /* |
2 | * Common Flash Interface support: | |
3 | * AMD & Fujitsu Standard Vendor Command Set (ID 0x0002) | |
4 | * | |
5 | * Copyright (C) 2000 Crossnet Co. <info@crossnet.co.jp> | |
6 | * Copyright (C) 2004 Arcom Control Systems Ltd <linux@arcom.com> | |
7 | * | |
8 | * 2_by_8 routines added by Simon Munton | |
9 | * | |
10 | * 4_by_16 work by Carolyn J. Smith | |
11 | * | |
12 | * Occasionally maintained by Thayne Harbaugh tharbaugh at lnxi dot com | |
13 | * | |
14 | * This code is GPL | |
15 | * | |
16 | * $Id: cfi_cmdset_0002.c,v 1.114 2004/12/11 15:43:53 dedekind Exp $ | |
17 | * | |
18 | */ | |
19 | ||
20 | #include <linux/config.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/types.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/sched.h> | |
25 | #include <linux/init.h> | |
26 | #include <asm/io.h> | |
27 | #include <asm/byteorder.h> | |
28 | ||
29 | #include <linux/errno.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/interrupt.h> | |
33 | #include <linux/mtd/compatmac.h> | |
34 | #include <linux/mtd/map.h> | |
35 | #include <linux/mtd/mtd.h> | |
36 | #include <linux/mtd/cfi.h> | |
37 | ||
38 | #define AMD_BOOTLOC_BUG | |
39 | #define FORCE_WORD_WRITE 0 | |
40 | ||
41 | #define MAX_WORD_RETRIES 3 | |
42 | ||
43 | #define MANUFACTURER_AMD 0x0001 | |
44 | #define MANUFACTURER_SST 0x00BF | |
45 | #define SST49LF004B 0x0060 | |
46 | ||
47 | static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); | |
48 | static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); | |
49 | static int cfi_amdstd_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); | |
50 | static int cfi_amdstd_erase_chip(struct mtd_info *, struct erase_info *); | |
51 | static int cfi_amdstd_erase_varsize(struct mtd_info *, struct erase_info *); | |
52 | static void cfi_amdstd_sync (struct mtd_info *); | |
53 | static int cfi_amdstd_suspend (struct mtd_info *); | |
54 | static void cfi_amdstd_resume (struct mtd_info *); | |
55 | static int cfi_amdstd_secsi_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); | |
56 | ||
57 | static void cfi_amdstd_destroy(struct mtd_info *); | |
58 | ||
59 | struct mtd_info *cfi_cmdset_0002(struct map_info *, int); | |
60 | static struct mtd_info *cfi_amdstd_setup (struct mtd_info *); | |
61 | ||
62 | static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode); | |
63 | static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr); | |
64 | #include "fwh_lock.h" | |
65 | ||
66 | static struct mtd_chip_driver cfi_amdstd_chipdrv = { | |
67 | .probe = NULL, /* Not usable directly */ | |
68 | .destroy = cfi_amdstd_destroy, | |
69 | .name = "cfi_cmdset_0002", | |
70 | .module = THIS_MODULE | |
71 | }; | |
72 | ||
73 | ||
74 | /* #define DEBUG_CFI_FEATURES */ | |
75 | ||
76 | ||
77 | #ifdef DEBUG_CFI_FEATURES | |
78 | static void cfi_tell_features(struct cfi_pri_amdstd *extp) | |
79 | { | |
80 | const char* erase_suspend[3] = { | |
81 | "Not supported", "Read only", "Read/write" | |
82 | }; | |
83 | const char* top_bottom[6] = { | |
84 | "No WP", "8x8KiB sectors at top & bottom, no WP", | |
85 | "Bottom boot", "Top boot", | |
86 | "Uniform, Bottom WP", "Uniform, Top WP" | |
87 | }; | |
88 | ||
89 | printk(" Silicon revision: %d\n", extp->SiliconRevision >> 1); | |
90 | printk(" Address sensitive unlock: %s\n", | |
91 | (extp->SiliconRevision & 1) ? "Not required" : "Required"); | |
92 | ||
93 | if (extp->EraseSuspend < ARRAY_SIZE(erase_suspend)) | |
94 | printk(" Erase Suspend: %s\n", erase_suspend[extp->EraseSuspend]); | |
95 | else | |
96 | printk(" Erase Suspend: Unknown value %d\n", extp->EraseSuspend); | |
97 | ||
98 | if (extp->BlkProt == 0) | |
99 | printk(" Block protection: Not supported\n"); | |
100 | else | |
101 | printk(" Block protection: %d sectors per group\n", extp->BlkProt); | |
102 | ||
103 | ||
104 | printk(" Temporary block unprotect: %s\n", | |
105 | extp->TmpBlkUnprotect ? "Supported" : "Not supported"); | |
106 | printk(" Block protect/unprotect scheme: %d\n", extp->BlkProtUnprot); | |
107 | printk(" Number of simultaneous operations: %d\n", extp->SimultaneousOps); | |
108 | printk(" Burst mode: %s\n", | |
109 | extp->BurstMode ? "Supported" : "Not supported"); | |
110 | if (extp->PageMode == 0) | |
111 | printk(" Page mode: Not supported\n"); | |
112 | else | |
113 | printk(" Page mode: %d word page\n", extp->PageMode << 2); | |
114 | ||
115 | printk(" Vpp Supply Minimum Program/Erase Voltage: %d.%d V\n", | |
116 | extp->VppMin >> 4, extp->VppMin & 0xf); | |
117 | printk(" Vpp Supply Maximum Program/Erase Voltage: %d.%d V\n", | |
118 | extp->VppMax >> 4, extp->VppMax & 0xf); | |
119 | ||
120 | if (extp->TopBottom < ARRAY_SIZE(top_bottom)) | |
121 | printk(" Top/Bottom Boot Block: %s\n", top_bottom[extp->TopBottom]); | |
122 | else | |
123 | printk(" Top/Bottom Boot Block: Unknown value %d\n", extp->TopBottom); | |
124 | } | |
125 | #endif | |
126 | ||
127 | #ifdef AMD_BOOTLOC_BUG | |
128 | /* Wheee. Bring me the head of someone at AMD. */ | |
129 | static void fixup_amd_bootblock(struct mtd_info *mtd, void* param) | |
130 | { | |
131 | struct map_info *map = mtd->priv; | |
132 | struct cfi_private *cfi = map->fldrv_priv; | |
133 | struct cfi_pri_amdstd *extp = cfi->cmdset_priv; | |
134 | __u8 major = extp->MajorVersion; | |
135 | __u8 minor = extp->MinorVersion; | |
136 | ||
137 | if (((major << 8) | minor) < 0x3131) { | |
138 | /* CFI version 1.0 => don't trust bootloc */ | |
139 | if (cfi->id & 0x80) { | |
140 | printk(KERN_WARNING "%s: JEDEC Device ID is 0x%02X. Assuming broken CFI table.\n", map->name, cfi->id); | |
141 | extp->TopBottom = 3; /* top boot */ | |
142 | } else { | |
143 | extp->TopBottom = 2; /* bottom boot */ | |
144 | } | |
145 | } | |
146 | } | |
147 | #endif | |
148 | ||
149 | static void fixup_use_write_buffers(struct mtd_info *mtd, void *param) | |
150 | { | |
151 | struct map_info *map = mtd->priv; | |
152 | struct cfi_private *cfi = map->fldrv_priv; | |
153 | if (cfi->cfiq->BufWriteTimeoutTyp) { | |
154 | DEBUG(MTD_DEBUG_LEVEL1, "Using buffer write method\n" ); | |
155 | mtd->write = cfi_amdstd_write_buffers; | |
156 | } | |
157 | } | |
158 | ||
159 | static void fixup_use_secsi(struct mtd_info *mtd, void *param) | |
160 | { | |
161 | /* Setup for chips with a secsi area */ | |
162 | mtd->read_user_prot_reg = cfi_amdstd_secsi_read; | |
163 | mtd->read_fact_prot_reg = cfi_amdstd_secsi_read; | |
164 | } | |
165 | ||
166 | static void fixup_use_erase_chip(struct mtd_info *mtd, void *param) | |
167 | { | |
168 | struct map_info *map = mtd->priv; | |
169 | struct cfi_private *cfi = map->fldrv_priv; | |
170 | if ((cfi->cfiq->NumEraseRegions == 1) && | |
171 | ((cfi->cfiq->EraseRegionInfo[0] & 0xffff) == 0)) { | |
172 | mtd->erase = cfi_amdstd_erase_chip; | |
173 | } | |
174 | ||
175 | } | |
176 | ||
177 | static struct cfi_fixup cfi_fixup_table[] = { | |
178 | #ifdef AMD_BOOTLOC_BUG | |
179 | { CFI_MFR_AMD, CFI_ID_ANY, fixup_amd_bootblock, NULL }, | |
180 | #endif | |
181 | { CFI_MFR_AMD, 0x0050, fixup_use_secsi, NULL, }, | |
182 | { CFI_MFR_AMD, 0x0053, fixup_use_secsi, NULL, }, | |
183 | { CFI_MFR_AMD, 0x0055, fixup_use_secsi, NULL, }, | |
184 | { CFI_MFR_AMD, 0x0056, fixup_use_secsi, NULL, }, | |
185 | { CFI_MFR_AMD, 0x005C, fixup_use_secsi, NULL, }, | |
186 | { CFI_MFR_AMD, 0x005F, fixup_use_secsi, NULL, }, | |
187 | #if !FORCE_WORD_WRITE | |
188 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL, }, | |
189 | #endif | |
190 | { 0, 0, NULL, NULL } | |
191 | }; | |
192 | static struct cfi_fixup jedec_fixup_table[] = { | |
193 | { MANUFACTURER_SST, SST49LF004B, fixup_use_fwh_lock, NULL, }, | |
194 | { 0, 0, NULL, NULL } | |
195 | }; | |
196 | ||
197 | static struct cfi_fixup fixup_table[] = { | |
198 | /* The CFI vendor ids and the JEDEC vendor IDs appear | |
199 | * to be common. It is like the devices id's are as | |
200 | * well. This table is to pick all cases where | |
201 | * we know that is the case. | |
202 | */ | |
203 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_erase_chip, NULL }, | |
204 | { 0, 0, NULL, NULL } | |
205 | }; | |
206 | ||
207 | ||
208 | struct mtd_info *cfi_cmdset_0002(struct map_info *map, int primary) | |
209 | { | |
210 | struct cfi_private *cfi = map->fldrv_priv; | |
211 | struct mtd_info *mtd; | |
212 | int i; | |
213 | ||
214 | mtd = kmalloc(sizeof(*mtd), GFP_KERNEL); | |
215 | if (!mtd) { | |
216 | printk(KERN_WARNING "Failed to allocate memory for MTD device\n"); | |
217 | return NULL; | |
218 | } | |
219 | memset(mtd, 0, sizeof(*mtd)); | |
220 | mtd->priv = map; | |
221 | mtd->type = MTD_NORFLASH; | |
222 | ||
223 | /* Fill in the default mtd operations */ | |
224 | mtd->erase = cfi_amdstd_erase_varsize; | |
225 | mtd->write = cfi_amdstd_write_words; | |
226 | mtd->read = cfi_amdstd_read; | |
227 | mtd->sync = cfi_amdstd_sync; | |
228 | mtd->suspend = cfi_amdstd_suspend; | |
229 | mtd->resume = cfi_amdstd_resume; | |
230 | mtd->flags = MTD_CAP_NORFLASH; | |
231 | mtd->name = map->name; | |
232 | ||
233 | if (cfi->cfi_mode==CFI_MODE_CFI){ | |
234 | unsigned char bootloc; | |
235 | /* | |
236 | * It's a real CFI chip, not one for which the probe | |
237 | * routine faked a CFI structure. So we read the feature | |
238 | * table from it. | |
239 | */ | |
240 | __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR; | |
241 | struct cfi_pri_amdstd *extp; | |
242 | ||
243 | extp = (struct cfi_pri_amdstd*)cfi_read_pri(map, adr, sizeof(*extp), "Amd/Fujitsu"); | |
244 | if (!extp) { | |
245 | kfree(mtd); | |
246 | return NULL; | |
247 | } | |
248 | ||
249 | /* Install our own private info structure */ | |
250 | cfi->cmdset_priv = extp; | |
251 | ||
252 | /* Apply cfi device specific fixups */ | |
253 | cfi_fixup(mtd, cfi_fixup_table); | |
254 | ||
255 | #ifdef DEBUG_CFI_FEATURES | |
256 | /* Tell the user about it in lots of lovely detail */ | |
257 | cfi_tell_features(extp); | |
258 | #endif | |
259 | ||
260 | bootloc = extp->TopBottom; | |
261 | if ((bootloc != 2) && (bootloc != 3)) { | |
262 | printk(KERN_WARNING "%s: CFI does not contain boot " | |
263 | "bank location. Assuming top.\n", map->name); | |
264 | bootloc = 2; | |
265 | } | |
266 | ||
267 | if (bootloc == 3 && cfi->cfiq->NumEraseRegions > 1) { | |
268 | printk(KERN_WARNING "%s: Swapping erase regions for broken CFI table.\n", map->name); | |
269 | ||
270 | for (i=0; i<cfi->cfiq->NumEraseRegions / 2; i++) { | |
271 | int j = (cfi->cfiq->NumEraseRegions-1)-i; | |
272 | __u32 swap; | |
273 | ||
274 | swap = cfi->cfiq->EraseRegionInfo[i]; | |
275 | cfi->cfiq->EraseRegionInfo[i] = cfi->cfiq->EraseRegionInfo[j]; | |
276 | cfi->cfiq->EraseRegionInfo[j] = swap; | |
277 | } | |
278 | } | |
279 | /* Set the default CFI lock/unlock addresses */ | |
280 | cfi->addr_unlock1 = 0x555; | |
281 | cfi->addr_unlock2 = 0x2aa; | |
282 | /* Modify the unlock address if we are in compatibility mode */ | |
283 | if ( /* x16 in x8 mode */ | |
284 | ((cfi->device_type == CFI_DEVICETYPE_X8) && | |
285 | (cfi->cfiq->InterfaceDesc == 2)) || | |
286 | /* x32 in x16 mode */ | |
287 | ((cfi->device_type == CFI_DEVICETYPE_X16) && | |
288 | (cfi->cfiq->InterfaceDesc == 4))) | |
289 | { | |
290 | cfi->addr_unlock1 = 0xaaa; | |
291 | cfi->addr_unlock2 = 0x555; | |
292 | } | |
293 | ||
294 | } /* CFI mode */ | |
295 | else if (cfi->cfi_mode == CFI_MODE_JEDEC) { | |
296 | /* Apply jedec specific fixups */ | |
297 | cfi_fixup(mtd, jedec_fixup_table); | |
298 | } | |
299 | /* Apply generic fixups */ | |
300 | cfi_fixup(mtd, fixup_table); | |
301 | ||
302 | for (i=0; i< cfi->numchips; i++) { | |
303 | cfi->chips[i].word_write_time = 1<<cfi->cfiq->WordWriteTimeoutTyp; | |
304 | cfi->chips[i].buffer_write_time = 1<<cfi->cfiq->BufWriteTimeoutTyp; | |
305 | cfi->chips[i].erase_time = 1<<cfi->cfiq->BlockEraseTimeoutTyp; | |
306 | } | |
307 | ||
308 | map->fldrv = &cfi_amdstd_chipdrv; | |
309 | ||
310 | return cfi_amdstd_setup(mtd); | |
311 | } | |
312 | ||
313 | ||
314 | static struct mtd_info *cfi_amdstd_setup(struct mtd_info *mtd) | |
315 | { | |
316 | struct map_info *map = mtd->priv; | |
317 | struct cfi_private *cfi = map->fldrv_priv; | |
318 | unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave; | |
319 | unsigned long offset = 0; | |
320 | int i,j; | |
321 | ||
322 | printk(KERN_NOTICE "number of %s chips: %d\n", | |
323 | (cfi->cfi_mode == CFI_MODE_CFI)?"CFI":"JEDEC",cfi->numchips); | |
324 | /* Select the correct geometry setup */ | |
325 | mtd->size = devsize * cfi->numchips; | |
326 | ||
327 | mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips; | |
328 | mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) | |
329 | * mtd->numeraseregions, GFP_KERNEL); | |
330 | if (!mtd->eraseregions) { | |
331 | printk(KERN_WARNING "Failed to allocate memory for MTD erase region info\n"); | |
332 | goto setup_err; | |
333 | } | |
334 | ||
335 | for (i=0; i<cfi->cfiq->NumEraseRegions; i++) { | |
336 | unsigned long ernum, ersize; | |
337 | ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave; | |
338 | ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1; | |
339 | ||
340 | if (mtd->erasesize < ersize) { | |
341 | mtd->erasesize = ersize; | |
342 | } | |
343 | for (j=0; j<cfi->numchips; j++) { | |
344 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset; | |
345 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize; | |
346 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum; | |
347 | } | |
348 | offset += (ersize * ernum); | |
349 | } | |
350 | if (offset != devsize) { | |
351 | /* Argh */ | |
352 | printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize); | |
353 | goto setup_err; | |
354 | } | |
355 | #if 0 | |
356 | // debug | |
357 | for (i=0; i<mtd->numeraseregions;i++){ | |
358 | printk("%d: offset=0x%x,size=0x%x,blocks=%d\n", | |
359 | i,mtd->eraseregions[i].offset, | |
360 | mtd->eraseregions[i].erasesize, | |
361 | mtd->eraseregions[i].numblocks); | |
362 | } | |
363 | #endif | |
364 | ||
365 | /* FIXME: erase-suspend-program is broken. See | |
366 | http://lists.infradead.org/pipermail/linux-mtd/2003-December/009001.html */ | |
367 | printk(KERN_NOTICE "cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.\n"); | |
368 | ||
369 | __module_get(THIS_MODULE); | |
370 | return mtd; | |
371 | ||
372 | setup_err: | |
373 | if(mtd) { | |
374 | if(mtd->eraseregions) | |
375 | kfree(mtd->eraseregions); | |
376 | kfree(mtd); | |
377 | } | |
378 | kfree(cfi->cmdset_priv); | |
379 | kfree(cfi->cfiq); | |
380 | return NULL; | |
381 | } | |
382 | ||
383 | /* | |
384 | * Return true if the chip is ready. | |
385 | * | |
386 | * Ready is one of: read mode, query mode, erase-suspend-read mode (in any | |
387 | * non-suspended sector) and is indicated by no toggle bits toggling. | |
388 | * | |
389 | * Note that anything more complicated than checking if no bits are toggling | |
390 | * (including checking DQ5 for an error status) is tricky to get working | |
391 | * correctly and is therefore not done (particulary with interleaved chips | |
392 | * as each chip must be checked independantly of the others). | |
393 | */ | |
394 | static int chip_ready(struct map_info *map, unsigned long addr) | |
395 | { | |
396 | map_word d, t; | |
397 | ||
398 | d = map_read(map, addr); | |
399 | t = map_read(map, addr); | |
400 | ||
401 | return map_word_equal(map, d, t); | |
402 | } | |
403 | ||
404 | static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode) | |
405 | { | |
406 | DECLARE_WAITQUEUE(wait, current); | |
407 | struct cfi_private *cfi = map->fldrv_priv; | |
408 | unsigned long timeo; | |
409 | struct cfi_pri_amdstd *cfip = (struct cfi_pri_amdstd *)cfi->cmdset_priv; | |
410 | ||
411 | resettime: | |
412 | timeo = jiffies + HZ; | |
413 | retry: | |
414 | switch (chip->state) { | |
415 | ||
416 | case FL_STATUS: | |
417 | for (;;) { | |
418 | if (chip_ready(map, adr)) | |
419 | break; | |
420 | ||
421 | if (time_after(jiffies, timeo)) { | |
422 | printk(KERN_ERR "Waiting for chip to be ready timed out.\n"); | |
423 | cfi_spin_unlock(chip->mutex); | |
424 | return -EIO; | |
425 | } | |
426 | cfi_spin_unlock(chip->mutex); | |
427 | cfi_udelay(1); | |
428 | cfi_spin_lock(chip->mutex); | |
429 | /* Someone else might have been playing with it. */ | |
430 | goto retry; | |
431 | } | |
432 | ||
433 | case FL_READY: | |
434 | case FL_CFI_QUERY: | |
435 | case FL_JEDEC_QUERY: | |
436 | return 0; | |
437 | ||
438 | case FL_ERASING: | |
439 | if (mode == FL_WRITING) /* FIXME: Erase-suspend-program appears broken. */ | |
440 | goto sleep; | |
441 | ||
442 | if (!(mode == FL_READY || mode == FL_POINT | |
443 | || !cfip | |
444 | || (mode == FL_WRITING && (cfip->EraseSuspend & 0x2)) | |
445 | || (mode == FL_WRITING && (cfip->EraseSuspend & 0x1)))) | |
446 | goto sleep; | |
447 | ||
448 | /* We could check to see if we're trying to access the sector | |
449 | * that is currently being erased. However, no user will try | |
450 | * anything like that so we just wait for the timeout. */ | |
451 | ||
452 | /* Erase suspend */ | |
453 | /* It's harmless to issue the Erase-Suspend and Erase-Resume | |
454 | * commands when the erase algorithm isn't in progress. */ | |
455 | map_write(map, CMD(0xB0), chip->in_progress_block_addr); | |
456 | chip->oldstate = FL_ERASING; | |
457 | chip->state = FL_ERASE_SUSPENDING; | |
458 | chip->erase_suspended = 1; | |
459 | for (;;) { | |
460 | if (chip_ready(map, adr)) | |
461 | break; | |
462 | ||
463 | if (time_after(jiffies, timeo)) { | |
464 | /* Should have suspended the erase by now. | |
465 | * Send an Erase-Resume command as either | |
466 | * there was an error (so leave the erase | |
467 | * routine to recover from it) or we trying to | |
468 | * use the erase-in-progress sector. */ | |
469 | map_write(map, CMD(0x30), chip->in_progress_block_addr); | |
470 | chip->state = FL_ERASING; | |
471 | chip->oldstate = FL_READY; | |
472 | printk(KERN_ERR "MTD %s(): chip not ready after erase suspend\n", __func__); | |
473 | return -EIO; | |
474 | } | |
475 | ||
476 | cfi_spin_unlock(chip->mutex); | |
477 | cfi_udelay(1); | |
478 | cfi_spin_lock(chip->mutex); | |
479 | /* Nobody will touch it while it's in state FL_ERASE_SUSPENDING. | |
480 | So we can just loop here. */ | |
481 | } | |
482 | chip->state = FL_READY; | |
483 | return 0; | |
484 | ||
485 | case FL_POINT: | |
486 | /* Only if there's no operation suspended... */ | |
487 | if (mode == FL_READY && chip->oldstate == FL_READY) | |
488 | return 0; | |
489 | ||
490 | default: | |
491 | sleep: | |
492 | set_current_state(TASK_UNINTERRUPTIBLE); | |
493 | add_wait_queue(&chip->wq, &wait); | |
494 | cfi_spin_unlock(chip->mutex); | |
495 | schedule(); | |
496 | remove_wait_queue(&chip->wq, &wait); | |
497 | cfi_spin_lock(chip->mutex); | |
498 | goto resettime; | |
499 | } | |
500 | } | |
501 | ||
502 | ||
503 | static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr) | |
504 | { | |
505 | struct cfi_private *cfi = map->fldrv_priv; | |
506 | ||
507 | switch(chip->oldstate) { | |
508 | case FL_ERASING: | |
509 | chip->state = chip->oldstate; | |
510 | map_write(map, CMD(0x30), chip->in_progress_block_addr); | |
511 | chip->oldstate = FL_READY; | |
512 | chip->state = FL_ERASING; | |
513 | break; | |
514 | ||
515 | case FL_READY: | |
516 | case FL_STATUS: | |
517 | /* We should really make set_vpp() count, rather than doing this */ | |
518 | DISABLE_VPP(map); | |
519 | break; | |
520 | default: | |
521 | printk(KERN_ERR "MTD: put_chip() called with oldstate %d!!\n", chip->oldstate); | |
522 | } | |
523 | wake_up(&chip->wq); | |
524 | } | |
525 | ||
526 | ||
527 | static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) | |
528 | { | |
529 | unsigned long cmd_addr; | |
530 | struct cfi_private *cfi = map->fldrv_priv; | |
531 | int ret; | |
532 | ||
533 | adr += chip->start; | |
534 | ||
535 | /* Ensure cmd read/writes are aligned. */ | |
536 | cmd_addr = adr & ~(map_bankwidth(map)-1); | |
537 | ||
538 | cfi_spin_lock(chip->mutex); | |
539 | ret = get_chip(map, chip, cmd_addr, FL_READY); | |
540 | if (ret) { | |
541 | cfi_spin_unlock(chip->mutex); | |
542 | return ret; | |
543 | } | |
544 | ||
545 | if (chip->state != FL_POINT && chip->state != FL_READY) { | |
546 | map_write(map, CMD(0xf0), cmd_addr); | |
547 | chip->state = FL_READY; | |
548 | } | |
549 | ||
550 | map_copy_from(map, buf, adr, len); | |
551 | ||
552 | put_chip(map, chip, cmd_addr); | |
553 | ||
554 | cfi_spin_unlock(chip->mutex); | |
555 | return 0; | |
556 | } | |
557 | ||
558 | ||
559 | static int cfi_amdstd_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) | |
560 | { | |
561 | struct map_info *map = mtd->priv; | |
562 | struct cfi_private *cfi = map->fldrv_priv; | |
563 | unsigned long ofs; | |
564 | int chipnum; | |
565 | int ret = 0; | |
566 | ||
567 | /* ofs: offset within the first chip that the first read should start */ | |
568 | ||
569 | chipnum = (from >> cfi->chipshift); | |
570 | ofs = from - (chipnum << cfi->chipshift); | |
571 | ||
572 | ||
573 | *retlen = 0; | |
574 | ||
575 | while (len) { | |
576 | unsigned long thislen; | |
577 | ||
578 | if (chipnum >= cfi->numchips) | |
579 | break; | |
580 | ||
581 | if ((len + ofs -1) >> cfi->chipshift) | |
582 | thislen = (1<<cfi->chipshift) - ofs; | |
583 | else | |
584 | thislen = len; | |
585 | ||
586 | ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); | |
587 | if (ret) | |
588 | break; | |
589 | ||
590 | *retlen += thislen; | |
591 | len -= thislen; | |
592 | buf += thislen; | |
593 | ||
594 | ofs = 0; | |
595 | chipnum++; | |
596 | } | |
597 | return ret; | |
598 | } | |
599 | ||
600 | ||
601 | static inline int do_read_secsi_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) | |
602 | { | |
603 | DECLARE_WAITQUEUE(wait, current); | |
604 | unsigned long timeo = jiffies + HZ; | |
605 | struct cfi_private *cfi = map->fldrv_priv; | |
606 | ||
607 | retry: | |
608 | cfi_spin_lock(chip->mutex); | |
609 | ||
610 | if (chip->state != FL_READY){ | |
611 | #if 0 | |
612 | printk(KERN_DEBUG "Waiting for chip to read, status = %d\n", chip->state); | |
613 | #endif | |
614 | set_current_state(TASK_UNINTERRUPTIBLE); | |
615 | add_wait_queue(&chip->wq, &wait); | |
616 | ||
617 | cfi_spin_unlock(chip->mutex); | |
618 | ||
619 | schedule(); | |
620 | remove_wait_queue(&chip->wq, &wait); | |
621 | #if 0 | |
622 | if(signal_pending(current)) | |
623 | return -EINTR; | |
624 | #endif | |
625 | timeo = jiffies + HZ; | |
626 | ||
627 | goto retry; | |
628 | } | |
629 | ||
630 | adr += chip->start; | |
631 | ||
632 | chip->state = FL_READY; | |
633 | ||
634 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); | |
635 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); | |
636 | cfi_send_gen_cmd(0x88, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); | |
637 | ||
638 | map_copy_from(map, buf, adr, len); | |
639 | ||
640 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); | |
641 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); | |
642 | cfi_send_gen_cmd(0x90, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); | |
643 | cfi_send_gen_cmd(0x00, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); | |
644 | ||
645 | wake_up(&chip->wq); | |
646 | cfi_spin_unlock(chip->mutex); | |
647 | ||
648 | return 0; | |
649 | } | |
650 | ||
651 | static int cfi_amdstd_secsi_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) | |
652 | { | |
653 | struct map_info *map = mtd->priv; | |
654 | struct cfi_private *cfi = map->fldrv_priv; | |
655 | unsigned long ofs; | |
656 | int chipnum; | |
657 | int ret = 0; | |
658 | ||
659 | ||
660 | /* ofs: offset within the first chip that the first read should start */ | |
661 | ||
662 | /* 8 secsi bytes per chip */ | |
663 | chipnum=from>>3; | |
664 | ofs=from & 7; | |
665 | ||
666 | ||
667 | *retlen = 0; | |
668 | ||
669 | while (len) { | |
670 | unsigned long thislen; | |
671 | ||
672 | if (chipnum >= cfi->numchips) | |
673 | break; | |
674 | ||
675 | if ((len + ofs -1) >> 3) | |
676 | thislen = (1<<3) - ofs; | |
677 | else | |
678 | thislen = len; | |
679 | ||
680 | ret = do_read_secsi_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); | |
681 | if (ret) | |
682 | break; | |
683 | ||
684 | *retlen += thislen; | |
685 | len -= thislen; | |
686 | buf += thislen; | |
687 | ||
688 | ofs = 0; | |
689 | chipnum++; | |
690 | } | |
691 | return ret; | |
692 | } | |
693 | ||
694 | ||
695 | static int do_write_oneword(struct map_info *map, struct flchip *chip, unsigned long adr, map_word datum) | |
696 | { | |
697 | struct cfi_private *cfi = map->fldrv_priv; | |
698 | unsigned long timeo = jiffies + HZ; | |
699 | /* | |
700 | * We use a 1ms + 1 jiffies generic timeout for writes (most devices | |
701 | * have a max write time of a few hundreds usec). However, we should | |
702 | * use the maximum timeout value given by the chip at probe time | |
703 | * instead. Unfortunately, struct flchip does have a field for | |
704 | * maximum timeout, only for typical which can be far too short | |
705 | * depending of the conditions. The ' + 1' is to avoid having a | |
706 | * timeout of 0 jiffies if HZ is smaller than 1000. | |
707 | */ | |
708 | unsigned long uWriteTimeout = ( HZ / 1000 ) + 1; | |
709 | int ret = 0; | |
710 | map_word oldd; | |
711 | int retry_cnt = 0; | |
712 | ||
713 | adr += chip->start; | |
714 | ||
715 | cfi_spin_lock(chip->mutex); | |
716 | ret = get_chip(map, chip, adr, FL_WRITING); | |
717 | if (ret) { | |
718 | cfi_spin_unlock(chip->mutex); | |
719 | return ret; | |
720 | } | |
721 | ||
722 | DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n", | |
723 | __func__, adr, datum.x[0] ); | |
724 | ||
725 | /* | |
726 | * Check for a NOP for the case when the datum to write is already | |
727 | * present - it saves time and works around buggy chips that corrupt | |
728 | * data at other locations when 0xff is written to a location that | |
729 | * already contains 0xff. | |
730 | */ | |
731 | oldd = map_read(map, adr); | |
732 | if (map_word_equal(map, oldd, datum)) { | |
733 | DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): NOP\n", | |
734 | __func__); | |
735 | goto op_done; | |
736 | } | |
737 | ||
738 | ENABLE_VPP(map); | |
739 | retry: | |
740 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); | |
741 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); | |
742 | cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); | |
743 | map_write(map, datum, adr); | |
744 | chip->state = FL_WRITING; | |
745 | ||
746 | cfi_spin_unlock(chip->mutex); | |
747 | cfi_udelay(chip->word_write_time); | |
748 | cfi_spin_lock(chip->mutex); | |
749 | ||
750 | /* See comment above for timeout value. */ | |
751 | timeo = jiffies + uWriteTimeout; | |
752 | for (;;) { | |
753 | if (chip->state != FL_WRITING) { | |
754 | /* Someone's suspended the write. Sleep */ | |
755 | DECLARE_WAITQUEUE(wait, current); | |
756 | ||
757 | set_current_state(TASK_UNINTERRUPTIBLE); | |
758 | add_wait_queue(&chip->wq, &wait); | |
759 | cfi_spin_unlock(chip->mutex); | |
760 | schedule(); | |
761 | remove_wait_queue(&chip->wq, &wait); | |
762 | timeo = jiffies + (HZ / 2); /* FIXME */ | |
763 | cfi_spin_lock(chip->mutex); | |
764 | continue; | |
765 | } | |
766 | ||
767 | if (chip_ready(map, adr)) | |
768 | goto op_done; | |
769 | ||
770 | if (time_after(jiffies, timeo)) | |
771 | break; | |
772 | ||
773 | /* Latency issues. Drop the lock, wait a while and retry */ | |
774 | cfi_spin_unlock(chip->mutex); | |
775 | cfi_udelay(1); | |
776 | cfi_spin_lock(chip->mutex); | |
777 | } | |
778 | ||
779 | printk(KERN_WARNING "MTD %s(): software timeout\n", __func__); | |
780 | ||
781 | /* reset on all failures. */ | |
782 | map_write( map, CMD(0xF0), chip->start ); | |
783 | /* FIXME - should have reset delay before continuing */ | |
784 | if (++retry_cnt <= MAX_WORD_RETRIES) | |
785 | goto retry; | |
786 | ||
787 | ret = -EIO; | |
788 | op_done: | |
789 | chip->state = FL_READY; | |
790 | put_chip(map, chip, adr); | |
791 | cfi_spin_unlock(chip->mutex); | |
792 | ||
793 | return ret; | |
794 | } | |
795 | ||
796 | ||
797 | static int cfi_amdstd_write_words(struct mtd_info *mtd, loff_t to, size_t len, | |
798 | size_t *retlen, const u_char *buf) | |
799 | { | |
800 | struct map_info *map = mtd->priv; | |
801 | struct cfi_private *cfi = map->fldrv_priv; | |
802 | int ret = 0; | |
803 | int chipnum; | |
804 | unsigned long ofs, chipstart; | |
805 | DECLARE_WAITQUEUE(wait, current); | |
806 | ||
807 | *retlen = 0; | |
808 | if (!len) | |
809 | return 0; | |
810 | ||
811 | chipnum = to >> cfi->chipshift; | |
812 | ofs = to - (chipnum << cfi->chipshift); | |
813 | chipstart = cfi->chips[chipnum].start; | |
814 | ||
815 | /* If it's not bus-aligned, do the first byte write */ | |
816 | if (ofs & (map_bankwidth(map)-1)) { | |
817 | unsigned long bus_ofs = ofs & ~(map_bankwidth(map)-1); | |
818 | int i = ofs - bus_ofs; | |
819 | int n = 0; | |
820 | map_word tmp_buf; | |
821 | ||
822 | retry: | |
823 | cfi_spin_lock(cfi->chips[chipnum].mutex); | |
824 | ||
825 | if (cfi->chips[chipnum].state != FL_READY) { | |
826 | #if 0 | |
827 | printk(KERN_DEBUG "Waiting for chip to write, status = %d\n", cfi->chips[chipnum].state); | |
828 | #endif | |
829 | set_current_state(TASK_UNINTERRUPTIBLE); | |
830 | add_wait_queue(&cfi->chips[chipnum].wq, &wait); | |
831 | ||
832 | cfi_spin_unlock(cfi->chips[chipnum].mutex); | |
833 | ||
834 | schedule(); | |
835 | remove_wait_queue(&cfi->chips[chipnum].wq, &wait); | |
836 | #if 0 | |
837 | if(signal_pending(current)) | |
838 | return -EINTR; | |
839 | #endif | |
840 | goto retry; | |
841 | } | |
842 | ||
843 | /* Load 'tmp_buf' with old contents of flash */ | |
844 | tmp_buf = map_read(map, bus_ofs+chipstart); | |
845 | ||
846 | cfi_spin_unlock(cfi->chips[chipnum].mutex); | |
847 | ||
848 | /* Number of bytes to copy from buffer */ | |
849 | n = min_t(int, len, map_bankwidth(map)-i); | |
850 | ||
851 | tmp_buf = map_word_load_partial(map, tmp_buf, buf, i, n); | |
852 | ||
853 | ret = do_write_oneword(map, &cfi->chips[chipnum], | |
854 | bus_ofs, tmp_buf); | |
855 | if (ret) | |
856 | return ret; | |
857 | ||
858 | ofs += n; | |
859 | buf += n; | |
860 | (*retlen) += n; | |
861 | len -= n; | |
862 | ||
863 | if (ofs >> cfi->chipshift) { | |
864 | chipnum ++; | |
865 | ofs = 0; | |
866 | if (chipnum == cfi->numchips) | |
867 | return 0; | |
868 | } | |
869 | } | |
870 | ||
871 | /* We are now aligned, write as much as possible */ | |
872 | while(len >= map_bankwidth(map)) { | |
873 | map_word datum; | |
874 | ||
875 | datum = map_word_load(map, buf); | |
876 | ||
877 | ret = do_write_oneword(map, &cfi->chips[chipnum], | |
878 | ofs, datum); | |
879 | if (ret) | |
880 | return ret; | |
881 | ||
882 | ofs += map_bankwidth(map); | |
883 | buf += map_bankwidth(map); | |
884 | (*retlen) += map_bankwidth(map); | |
885 | len -= map_bankwidth(map); | |
886 | ||
887 | if (ofs >> cfi->chipshift) { | |
888 | chipnum ++; | |
889 | ofs = 0; | |
890 | if (chipnum == cfi->numchips) | |
891 | return 0; | |
892 | chipstart = cfi->chips[chipnum].start; | |
893 | } | |
894 | } | |
895 | ||
896 | /* Write the trailing bytes if any */ | |
897 | if (len & (map_bankwidth(map)-1)) { | |
898 | map_word tmp_buf; | |
899 | ||
900 | retry1: | |
901 | cfi_spin_lock(cfi->chips[chipnum].mutex); | |
902 | ||
903 | if (cfi->chips[chipnum].state != FL_READY) { | |
904 | #if 0 | |
905 | printk(KERN_DEBUG "Waiting for chip to write, status = %d\n", cfi->chips[chipnum].state); | |
906 | #endif | |
907 | set_current_state(TASK_UNINTERRUPTIBLE); | |
908 | add_wait_queue(&cfi->chips[chipnum].wq, &wait); | |
909 | ||
910 | cfi_spin_unlock(cfi->chips[chipnum].mutex); | |
911 | ||
912 | schedule(); | |
913 | remove_wait_queue(&cfi->chips[chipnum].wq, &wait); | |
914 | #if 0 | |
915 | if(signal_pending(current)) | |
916 | return -EINTR; | |
917 | #endif | |
918 | goto retry1; | |
919 | } | |
920 | ||
921 | tmp_buf = map_read(map, ofs + chipstart); | |
922 | ||
923 | cfi_spin_unlock(cfi->chips[chipnum].mutex); | |
924 | ||
925 | tmp_buf = map_word_load_partial(map, tmp_buf, buf, 0, len); | |
926 | ||
927 | ret = do_write_oneword(map, &cfi->chips[chipnum], | |
928 | ofs, tmp_buf); | |
929 | if (ret) | |
930 | return ret; | |
931 | ||
932 | (*retlen) += len; | |
933 | } | |
934 | ||
935 | return 0; | |
936 | } | |
937 | ||
938 | ||
939 | /* | |
940 | * FIXME: interleaved mode not tested, and probably not supported! | |
941 | */ | |
942 | static inline int do_write_buffer(struct map_info *map, struct flchip *chip, | |
943 | unsigned long adr, const u_char *buf, int len) | |
944 | { | |
945 | struct cfi_private *cfi = map->fldrv_priv; | |
946 | unsigned long timeo = jiffies + HZ; | |
947 | /* see comments in do_write_oneword() regarding uWriteTimeo. */ | |
948 | unsigned long uWriteTimeout = ( HZ / 1000 ) + 1; | |
949 | int ret = -EIO; | |
950 | unsigned long cmd_adr; | |
951 | int z, words; | |
952 | map_word datum; | |
953 | ||
954 | adr += chip->start; | |
955 | cmd_adr = adr; | |
956 | ||
957 | cfi_spin_lock(chip->mutex); | |
958 | ret = get_chip(map, chip, adr, FL_WRITING); | |
959 | if (ret) { | |
960 | cfi_spin_unlock(chip->mutex); | |
961 | return ret; | |
962 | } | |
963 | ||
964 | datum = map_word_load(map, buf); | |
965 | ||
966 | DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n", | |
967 | __func__, adr, datum.x[0] ); | |
968 | ||
969 | ENABLE_VPP(map); | |
970 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); | |
971 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); | |
972 | //cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); | |
973 | ||
974 | /* Write Buffer Load */ | |
975 | map_write(map, CMD(0x25), cmd_adr); | |
976 | ||
977 | chip->state = FL_WRITING_TO_BUFFER; | |
978 | ||
979 | /* Write length of data to come */ | |
980 | words = len / map_bankwidth(map); | |
981 | map_write(map, CMD(words - 1), cmd_adr); | |
982 | /* Write data */ | |
983 | z = 0; | |
984 | while(z < words * map_bankwidth(map)) { | |
985 | datum = map_word_load(map, buf); | |
986 | map_write(map, datum, adr + z); | |
987 | ||
988 | z += map_bankwidth(map); | |
989 | buf += map_bankwidth(map); | |
990 | } | |
991 | z -= map_bankwidth(map); | |
992 | ||
993 | adr += z; | |
994 | ||
995 | /* Write Buffer Program Confirm: GO GO GO */ | |
996 | map_write(map, CMD(0x29), cmd_adr); | |
997 | chip->state = FL_WRITING; | |
998 | ||
999 | cfi_spin_unlock(chip->mutex); | |
1000 | cfi_udelay(chip->buffer_write_time); | |
1001 | cfi_spin_lock(chip->mutex); | |
1002 | ||
1003 | timeo = jiffies + uWriteTimeout; | |
1004 | ||
1005 | for (;;) { | |
1006 | if (chip->state != FL_WRITING) { | |
1007 | /* Someone's suspended the write. Sleep */ | |
1008 | DECLARE_WAITQUEUE(wait, current); | |
1009 | ||
1010 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1011 | add_wait_queue(&chip->wq, &wait); | |
1012 | cfi_spin_unlock(chip->mutex); | |
1013 | schedule(); | |
1014 | remove_wait_queue(&chip->wq, &wait); | |
1015 | timeo = jiffies + (HZ / 2); /* FIXME */ | |
1016 | cfi_spin_lock(chip->mutex); | |
1017 | continue; | |
1018 | } | |
1019 | ||
1020 | if (chip_ready(map, adr)) | |
1021 | goto op_done; | |
1022 | ||
1023 | if( time_after(jiffies, timeo)) | |
1024 | break; | |
1025 | ||
1026 | /* Latency issues. Drop the lock, wait a while and retry */ | |
1027 | cfi_spin_unlock(chip->mutex); | |
1028 | cfi_udelay(1); | |
1029 | cfi_spin_lock(chip->mutex); | |
1030 | } | |
1031 | ||
1032 | printk(KERN_WARNING "MTD %s(): software timeout\n", | |
1033 | __func__ ); | |
1034 | ||
1035 | /* reset on all failures. */ | |
1036 | map_write( map, CMD(0xF0), chip->start ); | |
1037 | /* FIXME - should have reset delay before continuing */ | |
1038 | ||
1039 | ret = -EIO; | |
1040 | op_done: | |
1041 | chip->state = FL_READY; | |
1042 | put_chip(map, chip, adr); | |
1043 | cfi_spin_unlock(chip->mutex); | |
1044 | ||
1045 | return ret; | |
1046 | } | |
1047 | ||
1048 | ||
1049 | static int cfi_amdstd_write_buffers(struct mtd_info *mtd, loff_t to, size_t len, | |
1050 | size_t *retlen, const u_char *buf) | |
1051 | { | |
1052 | struct map_info *map = mtd->priv; | |
1053 | struct cfi_private *cfi = map->fldrv_priv; | |
1054 | int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; | |
1055 | int ret = 0; | |
1056 | int chipnum; | |
1057 | unsigned long ofs; | |
1058 | ||
1059 | *retlen = 0; | |
1060 | if (!len) | |
1061 | return 0; | |
1062 | ||
1063 | chipnum = to >> cfi->chipshift; | |
1064 | ofs = to - (chipnum << cfi->chipshift); | |
1065 | ||
1066 | /* If it's not bus-aligned, do the first word write */ | |
1067 | if (ofs & (map_bankwidth(map)-1)) { | |
1068 | size_t local_len = (-ofs)&(map_bankwidth(map)-1); | |
1069 | if (local_len > len) | |
1070 | local_len = len; | |
1071 | ret = cfi_amdstd_write_words(mtd, ofs + (chipnum<<cfi->chipshift), | |
1072 | local_len, retlen, buf); | |
1073 | if (ret) | |
1074 | return ret; | |
1075 | ofs += local_len; | |
1076 | buf += local_len; | |
1077 | len -= local_len; | |
1078 | ||
1079 | if (ofs >> cfi->chipshift) { | |
1080 | chipnum ++; | |
1081 | ofs = 0; | |
1082 | if (chipnum == cfi->numchips) | |
1083 | return 0; | |
1084 | } | |
1085 | } | |
1086 | ||
1087 | /* Write buffer is worth it only if more than one word to write... */ | |
1088 | while (len >= map_bankwidth(map) * 2) { | |
1089 | /* We must not cross write block boundaries */ | |
1090 | int size = wbufsize - (ofs & (wbufsize-1)); | |
1091 | ||
1092 | if (size > len) | |
1093 | size = len; | |
1094 | if (size % map_bankwidth(map)) | |
1095 | size -= size % map_bankwidth(map); | |
1096 | ||
1097 | ret = do_write_buffer(map, &cfi->chips[chipnum], | |
1098 | ofs, buf, size); | |
1099 | if (ret) | |
1100 | return ret; | |
1101 | ||
1102 | ofs += size; | |
1103 | buf += size; | |
1104 | (*retlen) += size; | |
1105 | len -= size; | |
1106 | ||
1107 | if (ofs >> cfi->chipshift) { | |
1108 | chipnum ++; | |
1109 | ofs = 0; | |
1110 | if (chipnum == cfi->numchips) | |
1111 | return 0; | |
1112 | } | |
1113 | } | |
1114 | ||
1115 | if (len) { | |
1116 | size_t retlen_dregs = 0; | |
1117 | ||
1118 | ret = cfi_amdstd_write_words(mtd, ofs + (chipnum<<cfi->chipshift), | |
1119 | len, &retlen_dregs, buf); | |
1120 | ||
1121 | *retlen += retlen_dregs; | |
1122 | return ret; | |
1123 | } | |
1124 | ||
1125 | return 0; | |
1126 | } | |
1127 | ||
1128 | ||
1129 | /* | |
1130 | * Handle devices with one erase region, that only implement | |
1131 | * the chip erase command. | |
1132 | */ | |
1133 | static inline int do_erase_chip(struct map_info *map, struct flchip *chip) | |
1134 | { | |
1135 | struct cfi_private *cfi = map->fldrv_priv; | |
1136 | unsigned long timeo = jiffies + HZ; | |
1137 | unsigned long int adr; | |
1138 | DECLARE_WAITQUEUE(wait, current); | |
1139 | int ret = 0; | |
1140 | ||
1141 | adr = cfi->addr_unlock1; | |
1142 | ||
1143 | cfi_spin_lock(chip->mutex); | |
1144 | ret = get_chip(map, chip, adr, FL_WRITING); | |
1145 | if (ret) { | |
1146 | cfi_spin_unlock(chip->mutex); | |
1147 | return ret; | |
1148 | } | |
1149 | ||
1150 | DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): ERASE 0x%.8lx\n", | |
1151 | __func__, chip->start ); | |
1152 | ||
1153 | ENABLE_VPP(map); | |
1154 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); | |
1155 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); | |
1156 | cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); | |
1157 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); | |
1158 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); | |
1159 | cfi_send_gen_cmd(0x10, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); | |
1160 | ||
1161 | chip->state = FL_ERASING; | |
1162 | chip->erase_suspended = 0; | |
1163 | chip->in_progress_block_addr = adr; | |
1164 | ||
1165 | cfi_spin_unlock(chip->mutex); | |
1166 | msleep(chip->erase_time/2); | |
1167 | cfi_spin_lock(chip->mutex); | |
1168 | ||
1169 | timeo = jiffies + (HZ*20); | |
1170 | ||
1171 | for (;;) { | |
1172 | if (chip->state != FL_ERASING) { | |
1173 | /* Someone's suspended the erase. Sleep */ | |
1174 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1175 | add_wait_queue(&chip->wq, &wait); | |
1176 | cfi_spin_unlock(chip->mutex); | |
1177 | schedule(); | |
1178 | remove_wait_queue(&chip->wq, &wait); | |
1179 | cfi_spin_lock(chip->mutex); | |
1180 | continue; | |
1181 | } | |
1182 | if (chip->erase_suspended) { | |
1183 | /* This erase was suspended and resumed. | |
1184 | Adjust the timeout */ | |
1185 | timeo = jiffies + (HZ*20); /* FIXME */ | |
1186 | chip->erase_suspended = 0; | |
1187 | } | |
1188 | ||
1189 | if (chip_ready(map, adr)) | |
1190 | goto op_done; | |
1191 | ||
1192 | if (time_after(jiffies, timeo)) | |
1193 | break; | |
1194 | ||
1195 | /* Latency issues. Drop the lock, wait a while and retry */ | |
1196 | cfi_spin_unlock(chip->mutex); | |
1197 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1198 | schedule_timeout(1); | |
1199 | cfi_spin_lock(chip->mutex); | |
1200 | } | |
1201 | ||
1202 | printk(KERN_WARNING "MTD %s(): software timeout\n", | |
1203 | __func__ ); | |
1204 | ||
1205 | /* reset on all failures. */ | |
1206 | map_write( map, CMD(0xF0), chip->start ); | |
1207 | /* FIXME - should have reset delay before continuing */ | |
1208 | ||
1209 | ret = -EIO; | |
1210 | op_done: | |
1211 | chip->state = FL_READY; | |
1212 | put_chip(map, chip, adr); | |
1213 | cfi_spin_unlock(chip->mutex); | |
1214 | ||
1215 | return ret; | |
1216 | } | |
1217 | ||
1218 | ||
1219 | static inline int do_erase_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr, int len, void *thunk) | |
1220 | { | |
1221 | struct cfi_private *cfi = map->fldrv_priv; | |
1222 | unsigned long timeo = jiffies + HZ; | |
1223 | DECLARE_WAITQUEUE(wait, current); | |
1224 | int ret = 0; | |
1225 | ||
1226 | adr += chip->start; | |
1227 | ||
1228 | cfi_spin_lock(chip->mutex); | |
1229 | ret = get_chip(map, chip, adr, FL_ERASING); | |
1230 | if (ret) { | |
1231 | cfi_spin_unlock(chip->mutex); | |
1232 | return ret; | |
1233 | } | |
1234 | ||
1235 | DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): ERASE 0x%.8lx\n", | |
1236 | __func__, adr ); | |
1237 | ||
1238 | ENABLE_VPP(map); | |
1239 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); | |
1240 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); | |
1241 | cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); | |
1242 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); | |
1243 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); | |
1244 | map_write(map, CMD(0x30), adr); | |
1245 | ||
1246 | chip->state = FL_ERASING; | |
1247 | chip->erase_suspended = 0; | |
1248 | chip->in_progress_block_addr = adr; | |
1249 | ||
1250 | cfi_spin_unlock(chip->mutex); | |
1251 | msleep(chip->erase_time/2); | |
1252 | cfi_spin_lock(chip->mutex); | |
1253 | ||
1254 | timeo = jiffies + (HZ*20); | |
1255 | ||
1256 | for (;;) { | |
1257 | if (chip->state != FL_ERASING) { | |
1258 | /* Someone's suspended the erase. Sleep */ | |
1259 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1260 | add_wait_queue(&chip->wq, &wait); | |
1261 | cfi_spin_unlock(chip->mutex); | |
1262 | schedule(); | |
1263 | remove_wait_queue(&chip->wq, &wait); | |
1264 | cfi_spin_lock(chip->mutex); | |
1265 | continue; | |
1266 | } | |
1267 | if (chip->erase_suspended) { | |
1268 | /* This erase was suspended and resumed. | |
1269 | Adjust the timeout */ | |
1270 | timeo = jiffies + (HZ*20); /* FIXME */ | |
1271 | chip->erase_suspended = 0; | |
1272 | } | |
1273 | ||
1274 | if (chip_ready(map, adr)) | |
1275 | goto op_done; | |
1276 | ||
1277 | if (time_after(jiffies, timeo)) | |
1278 | break; | |
1279 | ||
1280 | /* Latency issues. Drop the lock, wait a while and retry */ | |
1281 | cfi_spin_unlock(chip->mutex); | |
1282 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1283 | schedule_timeout(1); | |
1284 | cfi_spin_lock(chip->mutex); | |
1285 | } | |
1286 | ||
1287 | printk(KERN_WARNING "MTD %s(): software timeout\n", | |
1288 | __func__ ); | |
1289 | ||
1290 | /* reset on all failures. */ | |
1291 | map_write( map, CMD(0xF0), chip->start ); | |
1292 | /* FIXME - should have reset delay before continuing */ | |
1293 | ||
1294 | ret = -EIO; | |
1295 | op_done: | |
1296 | chip->state = FL_READY; | |
1297 | put_chip(map, chip, adr); | |
1298 | cfi_spin_unlock(chip->mutex); | |
1299 | return ret; | |
1300 | } | |
1301 | ||
1302 | ||
1303 | int cfi_amdstd_erase_varsize(struct mtd_info *mtd, struct erase_info *instr) | |
1304 | { | |
1305 | unsigned long ofs, len; | |
1306 | int ret; | |
1307 | ||
1308 | ofs = instr->addr; | |
1309 | len = instr->len; | |
1310 | ||
1311 | ret = cfi_varsize_frob(mtd, do_erase_oneblock, ofs, len, NULL); | |
1312 | if (ret) | |
1313 | return ret; | |
1314 | ||
1315 | instr->state = MTD_ERASE_DONE; | |
1316 | mtd_erase_callback(instr); | |
1317 | ||
1318 | return 0; | |
1319 | } | |
1320 | ||
1321 | ||
1322 | static int cfi_amdstd_erase_chip(struct mtd_info *mtd, struct erase_info *instr) | |
1323 | { | |
1324 | struct map_info *map = mtd->priv; | |
1325 | struct cfi_private *cfi = map->fldrv_priv; | |
1326 | int ret = 0; | |
1327 | ||
1328 | if (instr->addr != 0) | |
1329 | return -EINVAL; | |
1330 | ||
1331 | if (instr->len != mtd->size) | |
1332 | return -EINVAL; | |
1333 | ||
1334 | ret = do_erase_chip(map, &cfi->chips[0]); | |
1335 | if (ret) | |
1336 | return ret; | |
1337 | ||
1338 | instr->state = MTD_ERASE_DONE; | |
1339 | mtd_erase_callback(instr); | |
1340 | ||
1341 | return 0; | |
1342 | } | |
1343 | ||
1344 | ||
1345 | static void cfi_amdstd_sync (struct mtd_info *mtd) | |
1346 | { | |
1347 | struct map_info *map = mtd->priv; | |
1348 | struct cfi_private *cfi = map->fldrv_priv; | |
1349 | int i; | |
1350 | struct flchip *chip; | |
1351 | int ret = 0; | |
1352 | DECLARE_WAITQUEUE(wait, current); | |
1353 | ||
1354 | for (i=0; !ret && i<cfi->numchips; i++) { | |
1355 | chip = &cfi->chips[i]; | |
1356 | ||
1357 | retry: | |
1358 | cfi_spin_lock(chip->mutex); | |
1359 | ||
1360 | switch(chip->state) { | |
1361 | case FL_READY: | |
1362 | case FL_STATUS: | |
1363 | case FL_CFI_QUERY: | |
1364 | case FL_JEDEC_QUERY: | |
1365 | chip->oldstate = chip->state; | |
1366 | chip->state = FL_SYNCING; | |
1367 | /* No need to wake_up() on this state change - | |
1368 | * as the whole point is that nobody can do anything | |
1369 | * with the chip now anyway. | |
1370 | */ | |
1371 | case FL_SYNCING: | |
1372 | cfi_spin_unlock(chip->mutex); | |
1373 | break; | |
1374 | ||
1375 | default: | |
1376 | /* Not an idle state */ | |
1377 | add_wait_queue(&chip->wq, &wait); | |
1378 | ||
1379 | cfi_spin_unlock(chip->mutex); | |
1380 | ||
1381 | schedule(); | |
1382 | ||
1383 | remove_wait_queue(&chip->wq, &wait); | |
1384 | ||
1385 | goto retry; | |
1386 | } | |
1387 | } | |
1388 | ||
1389 | /* Unlock the chips again */ | |
1390 | ||
1391 | for (i--; i >=0; i--) { | |
1392 | chip = &cfi->chips[i]; | |
1393 | ||
1394 | cfi_spin_lock(chip->mutex); | |
1395 | ||
1396 | if (chip->state == FL_SYNCING) { | |
1397 | chip->state = chip->oldstate; | |
1398 | wake_up(&chip->wq); | |
1399 | } | |
1400 | cfi_spin_unlock(chip->mutex); | |
1401 | } | |
1402 | } | |
1403 | ||
1404 | ||
1405 | static int cfi_amdstd_suspend(struct mtd_info *mtd) | |
1406 | { | |
1407 | struct map_info *map = mtd->priv; | |
1408 | struct cfi_private *cfi = map->fldrv_priv; | |
1409 | int i; | |
1410 | struct flchip *chip; | |
1411 | int ret = 0; | |
1412 | ||
1413 | for (i=0; !ret && i<cfi->numchips; i++) { | |
1414 | chip = &cfi->chips[i]; | |
1415 | ||
1416 | cfi_spin_lock(chip->mutex); | |
1417 | ||
1418 | switch(chip->state) { | |
1419 | case FL_READY: | |
1420 | case FL_STATUS: | |
1421 | case FL_CFI_QUERY: | |
1422 | case FL_JEDEC_QUERY: | |
1423 | chip->oldstate = chip->state; | |
1424 | chip->state = FL_PM_SUSPENDED; | |
1425 | /* No need to wake_up() on this state change - | |
1426 | * as the whole point is that nobody can do anything | |
1427 | * with the chip now anyway. | |
1428 | */ | |
1429 | case FL_PM_SUSPENDED: | |
1430 | break; | |
1431 | ||
1432 | default: | |
1433 | ret = -EAGAIN; | |
1434 | break; | |
1435 | } | |
1436 | cfi_spin_unlock(chip->mutex); | |
1437 | } | |
1438 | ||
1439 | /* Unlock the chips again */ | |
1440 | ||
1441 | if (ret) { | |
1442 | for (i--; i >=0; i--) { | |
1443 | chip = &cfi->chips[i]; | |
1444 | ||
1445 | cfi_spin_lock(chip->mutex); | |
1446 | ||
1447 | if (chip->state == FL_PM_SUSPENDED) { | |
1448 | chip->state = chip->oldstate; | |
1449 | wake_up(&chip->wq); | |
1450 | } | |
1451 | cfi_spin_unlock(chip->mutex); | |
1452 | } | |
1453 | } | |
1454 | ||
1455 | return ret; | |
1456 | } | |
1457 | ||
1458 | ||
1459 | static void cfi_amdstd_resume(struct mtd_info *mtd) | |
1460 | { | |
1461 | struct map_info *map = mtd->priv; | |
1462 | struct cfi_private *cfi = map->fldrv_priv; | |
1463 | int i; | |
1464 | struct flchip *chip; | |
1465 | ||
1466 | for (i=0; i<cfi->numchips; i++) { | |
1467 | ||
1468 | chip = &cfi->chips[i]; | |
1469 | ||
1470 | cfi_spin_lock(chip->mutex); | |
1471 | ||
1472 | if (chip->state == FL_PM_SUSPENDED) { | |
1473 | chip->state = FL_READY; | |
1474 | map_write(map, CMD(0xF0), chip->start); | |
1475 | wake_up(&chip->wq); | |
1476 | } | |
1477 | else | |
1478 | printk(KERN_ERR "Argh. Chip not in PM_SUSPENDED state upon resume()\n"); | |
1479 | ||
1480 | cfi_spin_unlock(chip->mutex); | |
1481 | } | |
1482 | } | |
1483 | ||
1484 | static void cfi_amdstd_destroy(struct mtd_info *mtd) | |
1485 | { | |
1486 | struct map_info *map = mtd->priv; | |
1487 | struct cfi_private *cfi = map->fldrv_priv; | |
1488 | kfree(cfi->cmdset_priv); | |
1489 | kfree(cfi->cfiq); | |
1490 | kfree(cfi); | |
1491 | kfree(mtd->eraseregions); | |
1492 | } | |
1493 | ||
1494 | static char im_name[]="cfi_cmdset_0002"; | |
1495 | ||
1496 | ||
1497 | static int __init cfi_amdstd_init(void) | |
1498 | { | |
1499 | inter_module_register(im_name, THIS_MODULE, &cfi_cmdset_0002); | |
1500 | return 0; | |
1501 | } | |
1502 | ||
1503 | ||
1504 | static void __exit cfi_amdstd_exit(void) | |
1505 | { | |
1506 | inter_module_unregister(im_name); | |
1507 | } | |
1508 | ||
1509 | ||
1510 | module_init(cfi_amdstd_init); | |
1511 | module_exit(cfi_amdstd_exit); | |
1512 | ||
1513 | MODULE_LICENSE("GPL"); | |
1514 | MODULE_AUTHOR("Crossnet Co. <info@crossnet.co.jp> et al."); | |
1515 | MODULE_DESCRIPTION("MTD chip driver for AMD/Fujitsu flash chips"); |