Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Common Flash Interface support: | |
3 | * ST Advanced Architecture Command Set (ID 0x0020) | |
4 | * | |
5 | * (C) 2000 Red Hat. GPL'd | |
6 | * | |
2f82af08 | 7 | * 10/10/2000 Nicolas Pitre <nico@fluxnic.net> |
1da177e4 LT |
8 | * - completely revamped method functions so they are aware and |
9 | * independent of the flash geometry (buswidth, interleave, etc.) | |
10 | * - scalability vs code size is completely set at compile-time | |
11 | * (see include/linux/mtd/cfi.h for selection) | |
12 | * - optimized write buffer method | |
13 | * 06/21/2002 Joern Engel <joern@wh.fh-wedel.de> and others | |
14 | * - modified Intel Command Set 0x0001 to support ST Advanced Architecture | |
15 | * (command set 0x0020) | |
16 | * - added a writev function | |
6a8b4d31 JE |
17 | * 07/13/2005 Joern Engel <joern@wh.fh-wedel.de> |
18 | * - Plugged memory leak in cfi_staa_writev(). | |
1da177e4 LT |
19 | */ |
20 | ||
1da177e4 LT |
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/map.h> | |
34 | #include <linux/mtd/cfi.h> | |
35 | #include <linux/mtd/mtd.h> | |
1da177e4 LT |
36 | |
37 | ||
38 | static int cfi_staa_read(struct mtd_info *, loff_t, size_t, size_t *, u_char *); | |
39 | static int cfi_staa_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); | |
40 | static int cfi_staa_writev(struct mtd_info *mtd, const struct kvec *vecs, | |
41 | unsigned long count, loff_t to, size_t *retlen); | |
42 | static int cfi_staa_erase_varsize(struct mtd_info *, struct erase_info *); | |
43 | static void cfi_staa_sync (struct mtd_info *); | |
69423d99 AH |
44 | static int cfi_staa_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len); |
45 | static int cfi_staa_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len); | |
1da177e4 LT |
46 | static int cfi_staa_suspend (struct mtd_info *); |
47 | static void cfi_staa_resume (struct mtd_info *); | |
48 | ||
49 | static void cfi_staa_destroy(struct mtd_info *); | |
50 | ||
51 | struct mtd_info *cfi_cmdset_0020(struct map_info *, int); | |
52 | ||
53 | static struct mtd_info *cfi_staa_setup (struct map_info *); | |
54 | ||
55 | static struct mtd_chip_driver cfi_staa_chipdrv = { | |
56 | .probe = NULL, /* Not usable directly */ | |
57 | .destroy = cfi_staa_destroy, | |
58 | .name = "cfi_cmdset_0020", | |
59 | .module = THIS_MODULE | |
60 | }; | |
61 | ||
62 | /* #define DEBUG_LOCK_BITS */ | |
63 | //#define DEBUG_CFI_FEATURES | |
64 | ||
65 | #ifdef DEBUG_CFI_FEATURES | |
66 | static void cfi_tell_features(struct cfi_pri_intelext *extp) | |
67 | { | |
68 | int i; | |
69 | printk(" Feature/Command Support: %4.4X\n", extp->FeatureSupport); | |
70 | printk(" - Chip Erase: %s\n", extp->FeatureSupport&1?"supported":"unsupported"); | |
71 | printk(" - Suspend Erase: %s\n", extp->FeatureSupport&2?"supported":"unsupported"); | |
72 | printk(" - Suspend Program: %s\n", extp->FeatureSupport&4?"supported":"unsupported"); | |
73 | printk(" - Legacy Lock/Unlock: %s\n", extp->FeatureSupport&8?"supported":"unsupported"); | |
74 | printk(" - Queued Erase: %s\n", extp->FeatureSupport&16?"supported":"unsupported"); | |
75 | printk(" - Instant block lock: %s\n", extp->FeatureSupport&32?"supported":"unsupported"); | |
76 | printk(" - Protection Bits: %s\n", extp->FeatureSupport&64?"supported":"unsupported"); | |
77 | printk(" - Page-mode read: %s\n", extp->FeatureSupport&128?"supported":"unsupported"); | |
78 | printk(" - Synchronous read: %s\n", extp->FeatureSupport&256?"supported":"unsupported"); | |
79 | for (i=9; i<32; i++) { | |
1f948b43 | 80 | if (extp->FeatureSupport & (1<<i)) |
1da177e4 LT |
81 | printk(" - Unknown Bit %X: supported\n", i); |
82 | } | |
1f948b43 | 83 | |
1da177e4 LT |
84 | printk(" Supported functions after Suspend: %2.2X\n", extp->SuspendCmdSupport); |
85 | printk(" - Program after Erase Suspend: %s\n", extp->SuspendCmdSupport&1?"supported":"unsupported"); | |
86 | for (i=1; i<8; i++) { | |
87 | if (extp->SuspendCmdSupport & (1<<i)) | |
88 | printk(" - Unknown Bit %X: supported\n", i); | |
89 | } | |
1f948b43 | 90 | |
1da177e4 LT |
91 | printk(" Block Status Register Mask: %4.4X\n", extp->BlkStatusRegMask); |
92 | printk(" - Lock Bit Active: %s\n", extp->BlkStatusRegMask&1?"yes":"no"); | |
93 | printk(" - Valid Bit Active: %s\n", extp->BlkStatusRegMask&2?"yes":"no"); | |
94 | for (i=2; i<16; i++) { | |
95 | if (extp->BlkStatusRegMask & (1<<i)) | |
96 | printk(" - Unknown Bit %X Active: yes\n",i); | |
97 | } | |
1f948b43 TG |
98 | |
99 | printk(" Vcc Logic Supply Optimum Program/Erase Voltage: %d.%d V\n", | |
1da177e4 LT |
100 | extp->VccOptimal >> 8, extp->VccOptimal & 0xf); |
101 | if (extp->VppOptimal) | |
1f948b43 | 102 | printk(" Vpp Programming Supply Optimum Program/Erase Voltage: %d.%d V\n", |
1da177e4 LT |
103 | extp->VppOptimal >> 8, extp->VppOptimal & 0xf); |
104 | } | |
105 | #endif | |
106 | ||
107 | /* This routine is made available to other mtd code via | |
108 | * inter_module_register. It must only be accessed through | |
109 | * inter_module_get which will bump the use count of this module. The | |
110 | * addresses passed back in cfi are valid as long as the use count of | |
111 | * this module is non-zero, i.e. between inter_module_get and | |
112 | * inter_module_put. Keith Owens <kaos@ocs.com.au> 29 Oct 2000. | |
113 | */ | |
114 | struct mtd_info *cfi_cmdset_0020(struct map_info *map, int primary) | |
115 | { | |
116 | struct cfi_private *cfi = map->fldrv_priv; | |
117 | int i; | |
118 | ||
119 | if (cfi->cfi_mode) { | |
1f948b43 | 120 | /* |
1da177e4 LT |
121 | * It's a real CFI chip, not one for which the probe |
122 | * routine faked a CFI structure. So we read the feature | |
123 | * table from it. | |
124 | */ | |
125 | __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR; | |
126 | struct cfi_pri_intelext *extp; | |
127 | ||
128 | extp = (struct cfi_pri_intelext*)cfi_read_pri(map, adr, sizeof(*extp), "ST Microelectronics"); | |
129 | if (!extp) | |
130 | return NULL; | |
131 | ||
d88f977b TP |
132 | if (extp->MajorVersion != '1' || |
133 | (extp->MinorVersion < '0' || extp->MinorVersion > '3')) { | |
134 | printk(KERN_ERR " Unknown ST Microelectronics" | |
135 | " Extended Query version %c.%c.\n", | |
136 | extp->MajorVersion, extp->MinorVersion); | |
137 | kfree(extp); | |
138 | return NULL; | |
139 | } | |
140 | ||
1da177e4 | 141 | /* Do some byteswapping if necessary */ |
8e987465 AS |
142 | extp->FeatureSupport = cfi32_to_cpu(map, extp->FeatureSupport); |
143 | extp->BlkStatusRegMask = cfi32_to_cpu(map, | |
144 | extp->BlkStatusRegMask); | |
1f948b43 | 145 | |
1da177e4 LT |
146 | #ifdef DEBUG_CFI_FEATURES |
147 | /* Tell the user about it in lots of lovely detail */ | |
148 | cfi_tell_features(extp); | |
1f948b43 | 149 | #endif |
1da177e4 LT |
150 | |
151 | /* Install our own private info structure */ | |
152 | cfi->cmdset_priv = extp; | |
1f948b43 | 153 | } |
1da177e4 LT |
154 | |
155 | for (i=0; i< cfi->numchips; i++) { | |
156 | cfi->chips[i].word_write_time = 128; | |
157 | cfi->chips[i].buffer_write_time = 128; | |
158 | cfi->chips[i].erase_time = 1024; | |
83d48091 VS |
159 | cfi->chips[i].ref_point_counter = 0; |
160 | init_waitqueue_head(&(cfi->chips[i].wq)); | |
1f948b43 | 161 | } |
1da177e4 LT |
162 | |
163 | return cfi_staa_setup(map); | |
164 | } | |
83ea4ef2 | 165 | EXPORT_SYMBOL_GPL(cfi_cmdset_0020); |
1da177e4 LT |
166 | |
167 | static struct mtd_info *cfi_staa_setup(struct map_info *map) | |
168 | { | |
169 | struct cfi_private *cfi = map->fldrv_priv; | |
170 | struct mtd_info *mtd; | |
171 | unsigned long offset = 0; | |
172 | int i,j; | |
173 | unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave; | |
174 | ||
95b93a0c | 175 | mtd = kzalloc(sizeof(*mtd), GFP_KERNEL); |
1da177e4 LT |
176 | //printk(KERN_DEBUG "number of CFI chips: %d\n", cfi->numchips); |
177 | ||
178 | if (!mtd) { | |
179 | printk(KERN_ERR "Failed to allocate memory for MTD device\n"); | |
180 | kfree(cfi->cmdset_priv); | |
181 | return NULL; | |
182 | } | |
183 | ||
1da177e4 LT |
184 | mtd->priv = map; |
185 | mtd->type = MTD_NORFLASH; | |
186 | mtd->size = devsize * cfi->numchips; | |
187 | ||
188 | mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips; | |
1f948b43 | 189 | mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) |
1da177e4 | 190 | * mtd->numeraseregions, GFP_KERNEL); |
1f948b43 | 191 | if (!mtd->eraseregions) { |
1da177e4 LT |
192 | printk(KERN_ERR "Failed to allocate memory for MTD erase region info\n"); |
193 | kfree(cfi->cmdset_priv); | |
194 | kfree(mtd); | |
195 | return NULL; | |
196 | } | |
1f948b43 | 197 | |
1da177e4 LT |
198 | for (i=0; i<cfi->cfiq->NumEraseRegions; i++) { |
199 | unsigned long ernum, ersize; | |
200 | ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave; | |
201 | ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1; | |
202 | ||
203 | if (mtd->erasesize < ersize) { | |
204 | mtd->erasesize = ersize; | |
205 | } | |
206 | for (j=0; j<cfi->numchips; j++) { | |
207 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset; | |
208 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize; | |
209 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum; | |
210 | } | |
211 | offset += (ersize * ernum); | |
212 | } | |
213 | ||
214 | if (offset != devsize) { | |
215 | /* Argh */ | |
216 | printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize); | |
217 | kfree(mtd->eraseregions); | |
218 | kfree(cfi->cmdset_priv); | |
219 | kfree(mtd); | |
220 | return NULL; | |
221 | } | |
222 | ||
223 | for (i=0; i<mtd->numeraseregions;i++){ | |
69423d99 AH |
224 | printk(KERN_DEBUG "%d: offset=0x%llx,size=0x%x,blocks=%d\n", |
225 | i, (unsigned long long)mtd->eraseregions[i].offset, | |
1da177e4 LT |
226 | mtd->eraseregions[i].erasesize, |
227 | mtd->eraseregions[i].numblocks); | |
228 | } | |
229 | ||
1f948b43 | 230 | /* Also select the correct geometry setup too */ |
1da177e4 LT |
231 | mtd->erase = cfi_staa_erase_varsize; |
232 | mtd->read = cfi_staa_read; | |
233 | mtd->write = cfi_staa_write_buffers; | |
234 | mtd->writev = cfi_staa_writev; | |
235 | mtd->sync = cfi_staa_sync; | |
236 | mtd->lock = cfi_staa_lock; | |
237 | mtd->unlock = cfi_staa_unlock; | |
238 | mtd->suspend = cfi_staa_suspend; | |
239 | mtd->resume = cfi_staa_resume; | |
5fa43394 | 240 | mtd->flags = MTD_CAP_NORFLASH & ~MTD_BIT_WRITEABLE; |
c8b229de | 241 | mtd->writesize = 8; /* FIXME: Should be 0 for STMicro flashes w/out ECC */ |
13ce77f4 | 242 | mtd->writebufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; |
1da177e4 LT |
243 | map->fldrv = &cfi_staa_chipdrv; |
244 | __module_get(THIS_MODULE); | |
245 | mtd->name = map->name; | |
246 | return mtd; | |
247 | } | |
248 | ||
249 | ||
250 | static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) | |
251 | { | |
252 | map_word status, status_OK; | |
253 | unsigned long timeo; | |
254 | DECLARE_WAITQUEUE(wait, current); | |
255 | int suspended = 0; | |
256 | unsigned long cmd_addr; | |
257 | struct cfi_private *cfi = map->fldrv_priv; | |
258 | ||
259 | adr += chip->start; | |
260 | ||
1f948b43 TG |
261 | /* Ensure cmd read/writes are aligned. */ |
262 | cmd_addr = adr & ~(map_bankwidth(map)-1); | |
1da177e4 LT |
263 | |
264 | /* Let's determine this according to the interleave only once */ | |
265 | status_OK = CMD(0x80); | |
266 | ||
267 | timeo = jiffies + HZ; | |
268 | retry: | |
c4e77376 | 269 | mutex_lock(&chip->mutex); |
1da177e4 LT |
270 | |
271 | /* Check that the chip's ready to talk to us. | |
272 | * If it's in FL_ERASING state, suspend it and make it talk now. | |
273 | */ | |
274 | switch (chip->state) { | |
275 | case FL_ERASING: | |
276 | if (!(((struct cfi_pri_intelext *)cfi->cmdset_priv)->FeatureSupport & 2)) | |
277 | goto sleep; /* We don't support erase suspend */ | |
1f948b43 | 278 | |
1da177e4 LT |
279 | map_write (map, CMD(0xb0), cmd_addr); |
280 | /* If the flash has finished erasing, then 'erase suspend' | |
281 | * appears to make some (28F320) flash devices switch to | |
282 | * 'read' mode. Make sure that we switch to 'read status' | |
283 | * mode so we get the right data. --rmk | |
284 | */ | |
285 | map_write(map, CMD(0x70), cmd_addr); | |
286 | chip->oldstate = FL_ERASING; | |
287 | chip->state = FL_ERASE_SUSPENDING; | |
288 | // printk("Erase suspending at 0x%lx\n", cmd_addr); | |
289 | for (;;) { | |
290 | status = map_read(map, cmd_addr); | |
291 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
292 | break; | |
1f948b43 | 293 | |
1da177e4 LT |
294 | if (time_after(jiffies, timeo)) { |
295 | /* Urgh */ | |
296 | map_write(map, CMD(0xd0), cmd_addr); | |
297 | /* make sure we're in 'read status' mode */ | |
298 | map_write(map, CMD(0x70), cmd_addr); | |
299 | chip->state = FL_ERASING; | |
100f2341 | 300 | wake_up(&chip->wq); |
c4e77376 | 301 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
302 | printk(KERN_ERR "Chip not ready after erase " |
303 | "suspended: status = 0x%lx\n", status.x[0]); | |
304 | return -EIO; | |
305 | } | |
1f948b43 | 306 | |
c4e77376 | 307 | mutex_unlock(&chip->mutex); |
1da177e4 | 308 | cfi_udelay(1); |
c4e77376 | 309 | mutex_lock(&chip->mutex); |
1da177e4 | 310 | } |
1f948b43 | 311 | |
1da177e4 LT |
312 | suspended = 1; |
313 | map_write(map, CMD(0xff), cmd_addr); | |
314 | chip->state = FL_READY; | |
315 | break; | |
1f948b43 | 316 | |
1da177e4 LT |
317 | #if 0 |
318 | case FL_WRITING: | |
319 | /* Not quite yet */ | |
320 | #endif | |
321 | ||
322 | case FL_READY: | |
323 | break; | |
324 | ||
325 | case FL_CFI_QUERY: | |
326 | case FL_JEDEC_QUERY: | |
327 | map_write(map, CMD(0x70), cmd_addr); | |
328 | chip->state = FL_STATUS; | |
329 | ||
330 | case FL_STATUS: | |
331 | status = map_read(map, cmd_addr); | |
332 | if (map_word_andequal(map, status, status_OK, status_OK)) { | |
333 | map_write(map, CMD(0xff), cmd_addr); | |
334 | chip->state = FL_READY; | |
335 | break; | |
336 | } | |
1f948b43 | 337 | |
1da177e4 LT |
338 | /* Urgh. Chip not yet ready to talk to us. */ |
339 | if (time_after(jiffies, timeo)) { | |
c4e77376 | 340 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
341 | printk(KERN_ERR "waiting for chip to be ready timed out in read. WSM status = %lx\n", status.x[0]); |
342 | return -EIO; | |
343 | } | |
344 | ||
345 | /* Latency issues. Drop the lock, wait a while and retry */ | |
c4e77376 | 346 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
347 | cfi_udelay(1); |
348 | goto retry; | |
349 | ||
350 | default: | |
351 | sleep: | |
352 | /* Stick ourselves on a wait queue to be woken when | |
353 | someone changes the status */ | |
354 | set_current_state(TASK_UNINTERRUPTIBLE); | |
355 | add_wait_queue(&chip->wq, &wait); | |
c4e77376 | 356 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
357 | schedule(); |
358 | remove_wait_queue(&chip->wq, &wait); | |
359 | timeo = jiffies + HZ; | |
360 | goto retry; | |
361 | } | |
362 | ||
363 | map_copy_from(map, buf, adr, len); | |
364 | ||
365 | if (suspended) { | |
366 | chip->state = chip->oldstate; | |
1f948b43 | 367 | /* What if one interleaved chip has finished and the |
1da177e4 | 368 | other hasn't? The old code would leave the finished |
1f948b43 | 369 | one in READY mode. That's bad, and caused -EROFS |
1da177e4 LT |
370 | errors to be returned from do_erase_oneblock because |
371 | that's the only bit it checked for at the time. | |
1f948b43 | 372 | As the state machine appears to explicitly allow |
1da177e4 | 373 | sending the 0x70 (Read Status) command to an erasing |
1f948b43 | 374 | chip and expecting it to be ignored, that's what we |
1da177e4 LT |
375 | do. */ |
376 | map_write(map, CMD(0xd0), cmd_addr); | |
1f948b43 | 377 | map_write(map, CMD(0x70), cmd_addr); |
1da177e4 LT |
378 | } |
379 | ||
380 | wake_up(&chip->wq); | |
c4e77376 | 381 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
382 | return 0; |
383 | } | |
384 | ||
385 | static int cfi_staa_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) | |
386 | { | |
387 | struct map_info *map = mtd->priv; | |
388 | struct cfi_private *cfi = map->fldrv_priv; | |
389 | unsigned long ofs; | |
390 | int chipnum; | |
391 | int ret = 0; | |
392 | ||
393 | /* ofs: offset within the first chip that the first read should start */ | |
394 | chipnum = (from >> cfi->chipshift); | |
395 | ofs = from - (chipnum << cfi->chipshift); | |
396 | ||
397 | *retlen = 0; | |
398 | ||
399 | while (len) { | |
400 | unsigned long thislen; | |
401 | ||
402 | if (chipnum >= cfi->numchips) | |
403 | break; | |
404 | ||
405 | if ((len + ofs -1) >> cfi->chipshift) | |
406 | thislen = (1<<cfi->chipshift) - ofs; | |
407 | else | |
408 | thislen = len; | |
409 | ||
410 | ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); | |
411 | if (ret) | |
412 | break; | |
413 | ||
414 | *retlen += thislen; | |
415 | len -= thislen; | |
416 | buf += thislen; | |
1f948b43 | 417 | |
1da177e4 LT |
418 | ofs = 0; |
419 | chipnum++; | |
420 | } | |
421 | return ret; | |
422 | } | |
423 | ||
1f948b43 | 424 | static inline int do_write_buffer(struct map_info *map, struct flchip *chip, |
1da177e4 LT |
425 | unsigned long adr, const u_char *buf, int len) |
426 | { | |
427 | struct cfi_private *cfi = map->fldrv_priv; | |
428 | map_word status, status_OK; | |
429 | unsigned long cmd_adr, timeo; | |
430 | DECLARE_WAITQUEUE(wait, current); | |
431 | int wbufsize, z; | |
1f948b43 | 432 | |
1da177e4 LT |
433 | /* M58LW064A requires bus alignment for buffer wriets -- saw */ |
434 | if (adr & (map_bankwidth(map)-1)) | |
435 | return -EINVAL; | |
436 | ||
437 | wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; | |
438 | adr += chip->start; | |
439 | cmd_adr = adr & ~(wbufsize-1); | |
1f948b43 | 440 | |
1da177e4 LT |
441 | /* Let's determine this according to the interleave only once */ |
442 | status_OK = CMD(0x80); | |
1f948b43 | 443 | |
1da177e4 LT |
444 | timeo = jiffies + HZ; |
445 | retry: | |
446 | ||
447 | #ifdef DEBUG_CFI_FEATURES | |
cb53b3b9 | 448 | printk("%s: chip->state[%d]\n", __func__, chip->state); |
1da177e4 | 449 | #endif |
c4e77376 | 450 | mutex_lock(&chip->mutex); |
1f948b43 | 451 | |
1da177e4 LT |
452 | /* Check that the chip's ready to talk to us. |
453 | * Later, we can actually think about interrupting it | |
454 | * if it's in FL_ERASING state. | |
455 | * Not just yet, though. | |
456 | */ | |
457 | switch (chip->state) { | |
458 | case FL_READY: | |
459 | break; | |
1f948b43 | 460 | |
1da177e4 LT |
461 | case FL_CFI_QUERY: |
462 | case FL_JEDEC_QUERY: | |
463 | map_write(map, CMD(0x70), cmd_adr); | |
464 | chip->state = FL_STATUS; | |
465 | #ifdef DEBUG_CFI_FEATURES | |
cb53b3b9 | 466 | printk("%s: 1 status[%x]\n", __func__, map_read(map, cmd_adr)); |
1da177e4 LT |
467 | #endif |
468 | ||
469 | case FL_STATUS: | |
470 | status = map_read(map, cmd_adr); | |
471 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
472 | break; | |
473 | /* Urgh. Chip not yet ready to talk to us. */ | |
474 | if (time_after(jiffies, timeo)) { | |
c4e77376 | 475 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
476 | printk(KERN_ERR "waiting for chip to be ready timed out in buffer write Xstatus = %lx, status = %lx\n", |
477 | status.x[0], map_read(map, cmd_adr).x[0]); | |
478 | return -EIO; | |
479 | } | |
480 | ||
481 | /* Latency issues. Drop the lock, wait a while and retry */ | |
c4e77376 | 482 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
483 | cfi_udelay(1); |
484 | goto retry; | |
485 | ||
486 | default: | |
487 | /* Stick ourselves on a wait queue to be woken when | |
488 | someone changes the status */ | |
489 | set_current_state(TASK_UNINTERRUPTIBLE); | |
490 | add_wait_queue(&chip->wq, &wait); | |
c4e77376 | 491 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
492 | schedule(); |
493 | remove_wait_queue(&chip->wq, &wait); | |
494 | timeo = jiffies + HZ; | |
495 | goto retry; | |
496 | } | |
497 | ||
498 | ENABLE_VPP(map); | |
499 | map_write(map, CMD(0xe8), cmd_adr); | |
500 | chip->state = FL_WRITING_TO_BUFFER; | |
501 | ||
502 | z = 0; | |
503 | for (;;) { | |
504 | status = map_read(map, cmd_adr); | |
505 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
506 | break; | |
507 | ||
c4e77376 | 508 | mutex_unlock(&chip->mutex); |
1da177e4 | 509 | cfi_udelay(1); |
c4e77376 | 510 | mutex_lock(&chip->mutex); |
1da177e4 LT |
511 | |
512 | if (++z > 100) { | |
513 | /* Argh. Not ready for write to buffer */ | |
514 | DISABLE_VPP(map); | |
515 | map_write(map, CMD(0x70), cmd_adr); | |
516 | chip->state = FL_STATUS; | |
c4e77376 | 517 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
518 | printk(KERN_ERR "Chip not ready for buffer write. Xstatus = %lx\n", status.x[0]); |
519 | return -EIO; | |
520 | } | |
521 | } | |
522 | ||
523 | /* Write length of data to come */ | |
524 | map_write(map, CMD(len/map_bankwidth(map)-1), cmd_adr ); | |
1f948b43 | 525 | |
1da177e4 LT |
526 | /* Write data */ |
527 | for (z = 0; z < len; | |
528 | z += map_bankwidth(map), buf += map_bankwidth(map)) { | |
529 | map_word d; | |
530 | d = map_word_load(map, buf); | |
531 | map_write(map, d, adr+z); | |
532 | } | |
533 | /* GO GO GO */ | |
534 | map_write(map, CMD(0xd0), cmd_adr); | |
535 | chip->state = FL_WRITING; | |
536 | ||
c4e77376 | 537 | mutex_unlock(&chip->mutex); |
1da177e4 | 538 | cfi_udelay(chip->buffer_write_time); |
c4e77376 | 539 | mutex_lock(&chip->mutex); |
1da177e4 LT |
540 | |
541 | timeo = jiffies + (HZ/2); | |
542 | z = 0; | |
543 | for (;;) { | |
544 | if (chip->state != FL_WRITING) { | |
545 | /* Someone's suspended the write. Sleep */ | |
546 | set_current_state(TASK_UNINTERRUPTIBLE); | |
547 | add_wait_queue(&chip->wq, &wait); | |
c4e77376 | 548 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
549 | schedule(); |
550 | remove_wait_queue(&chip->wq, &wait); | |
551 | timeo = jiffies + (HZ / 2); /* FIXME */ | |
c4e77376 | 552 | mutex_lock(&chip->mutex); |
1da177e4 LT |
553 | continue; |
554 | } | |
555 | ||
556 | status = map_read(map, cmd_adr); | |
557 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
558 | break; | |
559 | ||
560 | /* OK Still waiting */ | |
561 | if (time_after(jiffies, timeo)) { | |
562 | /* clear status */ | |
563 | map_write(map, CMD(0x50), cmd_adr); | |
564 | /* put back into read status register mode */ | |
565 | map_write(map, CMD(0x70), adr); | |
566 | chip->state = FL_STATUS; | |
567 | DISABLE_VPP(map); | |
c4e77376 | 568 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
569 | printk(KERN_ERR "waiting for chip to be ready timed out in bufwrite\n"); |
570 | return -EIO; | |
571 | } | |
1f948b43 | 572 | |
1da177e4 | 573 | /* Latency issues. Drop the lock, wait a while and retry */ |
c4e77376 | 574 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
575 | cfi_udelay(1); |
576 | z++; | |
c4e77376 | 577 | mutex_lock(&chip->mutex); |
1da177e4 LT |
578 | } |
579 | if (!z) { | |
580 | chip->buffer_write_time--; | |
581 | if (!chip->buffer_write_time) | |
582 | chip->buffer_write_time++; | |
583 | } | |
1f948b43 | 584 | if (z > 1) |
1da177e4 | 585 | chip->buffer_write_time++; |
1f948b43 | 586 | |
1da177e4 LT |
587 | /* Done and happy. */ |
588 | DISABLE_VPP(map); | |
589 | chip->state = FL_STATUS; | |
590 | ||
591 | /* check for errors: 'lock bit', 'VPP', 'dead cell'/'unerased cell' or 'incorrect cmd' -- saw */ | |
592 | if (map_word_bitsset(map, status, CMD(0x3a))) { | |
593 | #ifdef DEBUG_CFI_FEATURES | |
cb53b3b9 | 594 | printk("%s: 2 status[%lx]\n", __func__, status.x[0]); |
1da177e4 LT |
595 | #endif |
596 | /* clear status */ | |
597 | map_write(map, CMD(0x50), cmd_adr); | |
598 | /* put back into read status register mode */ | |
599 | map_write(map, CMD(0x70), adr); | |
600 | wake_up(&chip->wq); | |
c4e77376 | 601 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
602 | return map_word_bitsset(map, status, CMD(0x02)) ? -EROFS : -EIO; |
603 | } | |
604 | wake_up(&chip->wq); | |
c4e77376 | 605 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
606 | |
607 | return 0; | |
608 | } | |
609 | ||
1f948b43 | 610 | static int cfi_staa_write_buffers (struct mtd_info *mtd, loff_t to, |
1da177e4 LT |
611 | size_t len, size_t *retlen, const u_char *buf) |
612 | { | |
613 | struct map_info *map = mtd->priv; | |
614 | struct cfi_private *cfi = map->fldrv_priv; | |
615 | int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; | |
616 | int ret = 0; | |
617 | int chipnum; | |
618 | unsigned long ofs; | |
619 | ||
620 | *retlen = 0; | |
621 | if (!len) | |
622 | return 0; | |
623 | ||
624 | chipnum = to >> cfi->chipshift; | |
625 | ofs = to - (chipnum << cfi->chipshift); | |
626 | ||
627 | #ifdef DEBUG_CFI_FEATURES | |
cb53b3b9 HH |
628 | printk("%s: map_bankwidth(map)[%x]\n", __func__, map_bankwidth(map)); |
629 | printk("%s: chipnum[%x] wbufsize[%x]\n", __func__, chipnum, wbufsize); | |
630 | printk("%s: ofs[%x] len[%x]\n", __func__, ofs, len); | |
1da177e4 | 631 | #endif |
1f948b43 | 632 | |
1da177e4 LT |
633 | /* Write buffer is worth it only if more than one word to write... */ |
634 | while (len > 0) { | |
635 | /* We must not cross write block boundaries */ | |
636 | int size = wbufsize - (ofs & (wbufsize-1)); | |
637 | ||
638 | if (size > len) | |
639 | size = len; | |
640 | ||
1f948b43 | 641 | ret = do_write_buffer(map, &cfi->chips[chipnum], |
1da177e4 LT |
642 | ofs, buf, size); |
643 | if (ret) | |
644 | return ret; | |
645 | ||
646 | ofs += size; | |
647 | buf += size; | |
648 | (*retlen) += size; | |
649 | len -= size; | |
650 | ||
651 | if (ofs >> cfi->chipshift) { | |
1f948b43 | 652 | chipnum ++; |
1da177e4 LT |
653 | ofs = 0; |
654 | if (chipnum == cfi->numchips) | |
655 | return 0; | |
656 | } | |
657 | } | |
1f948b43 | 658 | |
1da177e4 LT |
659 | return 0; |
660 | } | |
661 | ||
662 | /* | |
663 | * Writev for ECC-Flashes is a little more complicated. We need to maintain | |
664 | * a small buffer for this. | |
665 | * XXX: If the buffer size is not a multiple of 2, this will break | |
666 | */ | |
992c9d24 | 667 | #define ECCBUF_SIZE (mtd->writesize) |
1da177e4 LT |
668 | #define ECCBUF_DIV(x) ((x) & ~(ECCBUF_SIZE - 1)) |
669 | #define ECCBUF_MOD(x) ((x) & (ECCBUF_SIZE - 1)) | |
670 | static int | |
671 | cfi_staa_writev(struct mtd_info *mtd, const struct kvec *vecs, | |
672 | unsigned long count, loff_t to, size_t *retlen) | |
673 | { | |
674 | unsigned long i; | |
675 | size_t totlen = 0, thislen; | |
676 | int ret = 0; | |
677 | size_t buflen = 0; | |
678 | static char *buffer; | |
679 | ||
680 | if (!ECCBUF_SIZE) { | |
681 | /* We should fall back to a general writev implementation. | |
682 | * Until that is written, just break. | |
683 | */ | |
684 | return -EIO; | |
685 | } | |
686 | buffer = kmalloc(ECCBUF_SIZE, GFP_KERNEL); | |
687 | if (!buffer) | |
688 | return -ENOMEM; | |
689 | ||
690 | for (i=0; i<count; i++) { | |
691 | size_t elem_len = vecs[i].iov_len; | |
692 | void *elem_base = vecs[i].iov_base; | |
693 | if (!elem_len) /* FIXME: Might be unnecessary. Check that */ | |
694 | continue; | |
695 | if (buflen) { /* cut off head */ | |
696 | if (buflen + elem_len < ECCBUF_SIZE) { /* just accumulate */ | |
697 | memcpy(buffer+buflen, elem_base, elem_len); | |
698 | buflen += elem_len; | |
699 | continue; | |
700 | } | |
701 | memcpy(buffer+buflen, elem_base, ECCBUF_SIZE-buflen); | |
eda95cbf AB |
702 | ret = mtd_write(mtd, to, ECCBUF_SIZE, &thislen, |
703 | buffer); | |
1da177e4 LT |
704 | totlen += thislen; |
705 | if (ret || thislen != ECCBUF_SIZE) | |
706 | goto write_error; | |
707 | elem_len -= thislen-buflen; | |
708 | elem_base += thislen-buflen; | |
709 | to += ECCBUF_SIZE; | |
710 | } | |
711 | if (ECCBUF_DIV(elem_len)) { /* write clean aligned data */ | |
eda95cbf AB |
712 | ret = mtd_write(mtd, to, ECCBUF_DIV(elem_len), |
713 | &thislen, elem_base); | |
1da177e4 LT |
714 | totlen += thislen; |
715 | if (ret || thislen != ECCBUF_DIV(elem_len)) | |
716 | goto write_error; | |
717 | to += thislen; | |
718 | } | |
719 | buflen = ECCBUF_MOD(elem_len); /* cut off tail */ | |
720 | if (buflen) { | |
721 | memset(buffer, 0xff, ECCBUF_SIZE); | |
722 | memcpy(buffer, elem_base + thislen, buflen); | |
723 | } | |
724 | } | |
725 | if (buflen) { /* flush last page, even if not full */ | |
726 | /* This is sometimes intended behaviour, really */ | |
eda95cbf | 727 | ret = mtd_write(mtd, to, buflen, &thislen, buffer); |
1da177e4 LT |
728 | totlen += thislen; |
729 | if (ret || thislen != ECCBUF_SIZE) | |
730 | goto write_error; | |
731 | } | |
732 | write_error: | |
733 | if (retlen) | |
734 | *retlen = totlen; | |
6a8b4d31 | 735 | kfree(buffer); |
1da177e4 LT |
736 | return ret; |
737 | } | |
738 | ||
739 | ||
740 | static inline int do_erase_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr) | |
741 | { | |
742 | struct cfi_private *cfi = map->fldrv_priv; | |
743 | map_word status, status_OK; | |
744 | unsigned long timeo; | |
745 | int retries = 3; | |
746 | DECLARE_WAITQUEUE(wait, current); | |
747 | int ret = 0; | |
748 | ||
749 | adr += chip->start; | |
750 | ||
751 | /* Let's determine this according to the interleave only once */ | |
752 | status_OK = CMD(0x80); | |
753 | ||
754 | timeo = jiffies + HZ; | |
755 | retry: | |
c4e77376 | 756 | mutex_lock(&chip->mutex); |
1da177e4 LT |
757 | |
758 | /* Check that the chip's ready to talk to us. */ | |
759 | switch (chip->state) { | |
760 | case FL_CFI_QUERY: | |
761 | case FL_JEDEC_QUERY: | |
762 | case FL_READY: | |
763 | map_write(map, CMD(0x70), adr); | |
764 | chip->state = FL_STATUS; | |
765 | ||
766 | case FL_STATUS: | |
767 | status = map_read(map, adr); | |
768 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
769 | break; | |
1f948b43 | 770 | |
1da177e4 LT |
771 | /* Urgh. Chip not yet ready to talk to us. */ |
772 | if (time_after(jiffies, timeo)) { | |
c4e77376 | 773 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
774 | printk(KERN_ERR "waiting for chip to be ready timed out in erase\n"); |
775 | return -EIO; | |
776 | } | |
777 | ||
778 | /* Latency issues. Drop the lock, wait a while and retry */ | |
c4e77376 | 779 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
780 | cfi_udelay(1); |
781 | goto retry; | |
782 | ||
783 | default: | |
784 | /* Stick ourselves on a wait queue to be woken when | |
785 | someone changes the status */ | |
786 | set_current_state(TASK_UNINTERRUPTIBLE); | |
787 | add_wait_queue(&chip->wq, &wait); | |
c4e77376 | 788 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
789 | schedule(); |
790 | remove_wait_queue(&chip->wq, &wait); | |
791 | timeo = jiffies + HZ; | |
792 | goto retry; | |
793 | } | |
794 | ||
795 | ENABLE_VPP(map); | |
796 | /* Clear the status register first */ | |
797 | map_write(map, CMD(0x50), adr); | |
798 | ||
799 | /* Now erase */ | |
800 | map_write(map, CMD(0x20), adr); | |
801 | map_write(map, CMD(0xD0), adr); | |
802 | chip->state = FL_ERASING; | |
1f948b43 | 803 | |
c4e77376 | 804 | mutex_unlock(&chip->mutex); |
1da177e4 | 805 | msleep(1000); |
c4e77376 | 806 | mutex_lock(&chip->mutex); |
1da177e4 LT |
807 | |
808 | /* FIXME. Use a timer to check this, and return immediately. */ | |
809 | /* Once the state machine's known to be working I'll do that */ | |
810 | ||
811 | timeo = jiffies + (HZ*20); | |
812 | for (;;) { | |
813 | if (chip->state != FL_ERASING) { | |
814 | /* Someone's suspended the erase. Sleep */ | |
815 | set_current_state(TASK_UNINTERRUPTIBLE); | |
816 | add_wait_queue(&chip->wq, &wait); | |
c4e77376 | 817 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
818 | schedule(); |
819 | remove_wait_queue(&chip->wq, &wait); | |
820 | timeo = jiffies + (HZ*20); /* FIXME */ | |
c4e77376 | 821 | mutex_lock(&chip->mutex); |
1da177e4 LT |
822 | continue; |
823 | } | |
824 | ||
825 | status = map_read(map, adr); | |
826 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
827 | break; | |
1f948b43 | 828 | |
1da177e4 LT |
829 | /* OK Still waiting */ |
830 | if (time_after(jiffies, timeo)) { | |
831 | map_write(map, CMD(0x70), adr); | |
832 | chip->state = FL_STATUS; | |
833 | printk(KERN_ERR "waiting for erase to complete timed out. Xstatus = %lx, status = %lx.\n", status.x[0], map_read(map, adr).x[0]); | |
834 | DISABLE_VPP(map); | |
c4e77376 | 835 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
836 | return -EIO; |
837 | } | |
1f948b43 | 838 | |
1da177e4 | 839 | /* Latency issues. Drop the lock, wait a while and retry */ |
c4e77376 | 840 | mutex_unlock(&chip->mutex); |
1da177e4 | 841 | cfi_udelay(1); |
c4e77376 | 842 | mutex_lock(&chip->mutex); |
1da177e4 | 843 | } |
1f948b43 | 844 | |
1da177e4 LT |
845 | DISABLE_VPP(map); |
846 | ret = 0; | |
847 | ||
848 | /* We've broken this before. It doesn't hurt to be safe */ | |
849 | map_write(map, CMD(0x70), adr); | |
850 | chip->state = FL_STATUS; | |
851 | status = map_read(map, adr); | |
852 | ||
853 | /* check for lock bit */ | |
854 | if (map_word_bitsset(map, status, CMD(0x3a))) { | |
855 | unsigned char chipstatus = status.x[0]; | |
856 | if (!map_word_equal(map, status, CMD(chipstatus))) { | |
857 | int i, w; | |
858 | for (w=0; w<map_words(map); w++) { | |
859 | for (i = 0; i<cfi_interleave(cfi); i++) { | |
860 | chipstatus |= status.x[w] >> (cfi->device_type * 8); | |
861 | } | |
862 | } | |
863 | printk(KERN_WARNING "Status is not identical for all chips: 0x%lx. Merging to give 0x%02x\n", | |
864 | status.x[0], chipstatus); | |
865 | } | |
866 | /* Reset the error bits */ | |
867 | map_write(map, CMD(0x50), adr); | |
868 | map_write(map, CMD(0x70), adr); | |
1f948b43 | 869 | |
1da177e4 LT |
870 | if ((chipstatus & 0x30) == 0x30) { |
871 | printk(KERN_NOTICE "Chip reports improper command sequence: status 0x%x\n", chipstatus); | |
872 | ret = -EIO; | |
873 | } else if (chipstatus & 0x02) { | |
874 | /* Protection bit set */ | |
875 | ret = -EROFS; | |
876 | } else if (chipstatus & 0x8) { | |
877 | /* Voltage */ | |
878 | printk(KERN_WARNING "Chip reports voltage low on erase: status 0x%x\n", chipstatus); | |
879 | ret = -EIO; | |
880 | } else if (chipstatus & 0x20) { | |
881 | if (retries--) { | |
882 | printk(KERN_DEBUG "Chip erase failed at 0x%08lx: status 0x%x. Retrying...\n", adr, chipstatus); | |
883 | timeo = jiffies + HZ; | |
884 | chip->state = FL_STATUS; | |
c4e77376 | 885 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
886 | goto retry; |
887 | } | |
888 | printk(KERN_DEBUG "Chip erase failed at 0x%08lx: status 0x%x\n", adr, chipstatus); | |
889 | ret = -EIO; | |
890 | } | |
891 | } | |
892 | ||
893 | wake_up(&chip->wq); | |
c4e77376 | 894 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
895 | return ret; |
896 | } | |
897 | ||
eb8e3183 AB |
898 | static int cfi_staa_erase_varsize(struct mtd_info *mtd, |
899 | struct erase_info *instr) | |
1da177e4 LT |
900 | { struct map_info *map = mtd->priv; |
901 | struct cfi_private *cfi = map->fldrv_priv; | |
902 | unsigned long adr, len; | |
903 | int chipnum, ret = 0; | |
904 | int i, first; | |
905 | struct mtd_erase_region_info *regions = mtd->eraseregions; | |
906 | ||
907 | if (instr->addr > mtd->size) | |
908 | return -EINVAL; | |
909 | ||
910 | if ((instr->len + instr->addr) > mtd->size) | |
911 | return -EINVAL; | |
912 | ||
913 | /* Check that both start and end of the requested erase are | |
914 | * aligned with the erasesize at the appropriate addresses. | |
915 | */ | |
916 | ||
917 | i = 0; | |
918 | ||
1f948b43 | 919 | /* Skip all erase regions which are ended before the start of |
1da177e4 LT |
920 | the requested erase. Actually, to save on the calculations, |
921 | we skip to the first erase region which starts after the | |
922 | start of the requested erase, and then go back one. | |
923 | */ | |
1f948b43 | 924 | |
1da177e4 LT |
925 | while (i < mtd->numeraseregions && instr->addr >= regions[i].offset) |
926 | i++; | |
927 | i--; | |
928 | ||
1f948b43 | 929 | /* OK, now i is pointing at the erase region in which this |
1da177e4 LT |
930 | erase request starts. Check the start of the requested |
931 | erase range is aligned with the erase size which is in | |
932 | effect here. | |
933 | */ | |
934 | ||
935 | if (instr->addr & (regions[i].erasesize-1)) | |
936 | return -EINVAL; | |
937 | ||
938 | /* Remember the erase region we start on */ | |
939 | first = i; | |
940 | ||
941 | /* Next, check that the end of the requested erase is aligned | |
942 | * with the erase region at that address. | |
943 | */ | |
944 | ||
945 | while (i<mtd->numeraseregions && (instr->addr + instr->len) >= regions[i].offset) | |
946 | i++; | |
947 | ||
948 | /* As before, drop back one to point at the region in which | |
949 | the address actually falls | |
950 | */ | |
951 | i--; | |
1f948b43 | 952 | |
1da177e4 LT |
953 | if ((instr->addr + instr->len) & (regions[i].erasesize-1)) |
954 | return -EINVAL; | |
955 | ||
956 | chipnum = instr->addr >> cfi->chipshift; | |
957 | adr = instr->addr - (chipnum << cfi->chipshift); | |
958 | len = instr->len; | |
959 | ||
960 | i=first; | |
961 | ||
962 | while(len) { | |
963 | ret = do_erase_oneblock(map, &cfi->chips[chipnum], adr); | |
1f948b43 | 964 | |
1da177e4 LT |
965 | if (ret) |
966 | return ret; | |
967 | ||
968 | adr += regions[i].erasesize; | |
969 | len -= regions[i].erasesize; | |
970 | ||
69423d99 | 971 | if (adr % (1<< cfi->chipshift) == (((unsigned long)regions[i].offset + (regions[i].erasesize * regions[i].numblocks)) %( 1<< cfi->chipshift))) |
1da177e4 LT |
972 | i++; |
973 | ||
974 | if (adr >> cfi->chipshift) { | |
975 | adr = 0; | |
976 | chipnum++; | |
1f948b43 | 977 | |
1da177e4 LT |
978 | if (chipnum >= cfi->numchips) |
979 | break; | |
980 | } | |
981 | } | |
1f948b43 | 982 | |
1da177e4 LT |
983 | instr->state = MTD_ERASE_DONE; |
984 | mtd_erase_callback(instr); | |
1f948b43 | 985 | |
1da177e4 LT |
986 | return 0; |
987 | } | |
988 | ||
989 | static void cfi_staa_sync (struct mtd_info *mtd) | |
990 | { | |
991 | struct map_info *map = mtd->priv; | |
992 | struct cfi_private *cfi = map->fldrv_priv; | |
993 | int i; | |
994 | struct flchip *chip; | |
995 | int ret = 0; | |
996 | DECLARE_WAITQUEUE(wait, current); | |
997 | ||
998 | for (i=0; !ret && i<cfi->numchips; i++) { | |
999 | chip = &cfi->chips[i]; | |
1000 | ||
1001 | retry: | |
c4e77376 | 1002 | mutex_lock(&chip->mutex); |
1da177e4 LT |
1003 | |
1004 | switch(chip->state) { | |
1005 | case FL_READY: | |
1006 | case FL_STATUS: | |
1007 | case FL_CFI_QUERY: | |
1008 | case FL_JEDEC_QUERY: | |
1009 | chip->oldstate = chip->state; | |
1010 | chip->state = FL_SYNCING; | |
1f948b43 | 1011 | /* No need to wake_up() on this state change - |
1da177e4 LT |
1012 | * as the whole point is that nobody can do anything |
1013 | * with the chip now anyway. | |
1014 | */ | |
1015 | case FL_SYNCING: | |
c4e77376 | 1016 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1017 | break; |
1018 | ||
1019 | default: | |
1020 | /* Not an idle state */ | |
f8e30e44 | 1021 | set_current_state(TASK_UNINTERRUPTIBLE); |
1da177e4 | 1022 | add_wait_queue(&chip->wq, &wait); |
1f948b43 | 1023 | |
c4e77376 | 1024 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1025 | schedule(); |
1026 | remove_wait_queue(&chip->wq, &wait); | |
1f948b43 | 1027 | |
1da177e4 LT |
1028 | goto retry; |
1029 | } | |
1030 | } | |
1031 | ||
1032 | /* Unlock the chips again */ | |
1033 | ||
1034 | for (i--; i >=0; i--) { | |
1035 | chip = &cfi->chips[i]; | |
1036 | ||
c4e77376 | 1037 | mutex_lock(&chip->mutex); |
1f948b43 | 1038 | |
1da177e4 LT |
1039 | if (chip->state == FL_SYNCING) { |
1040 | chip->state = chip->oldstate; | |
1041 | wake_up(&chip->wq); | |
1042 | } | |
c4e77376 | 1043 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1044 | } |
1045 | } | |
1046 | ||
1047 | static inline int do_lock_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr) | |
1048 | { | |
1049 | struct cfi_private *cfi = map->fldrv_priv; | |
1050 | map_word status, status_OK; | |
1051 | unsigned long timeo = jiffies + HZ; | |
1052 | DECLARE_WAITQUEUE(wait, current); | |
1053 | ||
1054 | adr += chip->start; | |
1055 | ||
1056 | /* Let's determine this according to the interleave only once */ | |
1057 | status_OK = CMD(0x80); | |
1058 | ||
1059 | timeo = jiffies + HZ; | |
1060 | retry: | |
c4e77376 | 1061 | mutex_lock(&chip->mutex); |
1da177e4 LT |
1062 | |
1063 | /* Check that the chip's ready to talk to us. */ | |
1064 | switch (chip->state) { | |
1065 | case FL_CFI_QUERY: | |
1066 | case FL_JEDEC_QUERY: | |
1067 | case FL_READY: | |
1068 | map_write(map, CMD(0x70), adr); | |
1069 | chip->state = FL_STATUS; | |
1070 | ||
1071 | case FL_STATUS: | |
1072 | status = map_read(map, adr); | |
1f948b43 | 1073 | if (map_word_andequal(map, status, status_OK, status_OK)) |
1da177e4 | 1074 | break; |
1f948b43 | 1075 | |
1da177e4 LT |
1076 | /* Urgh. Chip not yet ready to talk to us. */ |
1077 | if (time_after(jiffies, timeo)) { | |
c4e77376 | 1078 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1079 | printk(KERN_ERR "waiting for chip to be ready timed out in lock\n"); |
1080 | return -EIO; | |
1081 | } | |
1082 | ||
1083 | /* Latency issues. Drop the lock, wait a while and retry */ | |
c4e77376 | 1084 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1085 | cfi_udelay(1); |
1086 | goto retry; | |
1087 | ||
1088 | default: | |
1089 | /* Stick ourselves on a wait queue to be woken when | |
1090 | someone changes the status */ | |
1091 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1092 | add_wait_queue(&chip->wq, &wait); | |
c4e77376 | 1093 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1094 | schedule(); |
1095 | remove_wait_queue(&chip->wq, &wait); | |
1096 | timeo = jiffies + HZ; | |
1097 | goto retry; | |
1098 | } | |
1099 | ||
1100 | ENABLE_VPP(map); | |
1101 | map_write(map, CMD(0x60), adr); | |
1102 | map_write(map, CMD(0x01), adr); | |
1103 | chip->state = FL_LOCKING; | |
1f948b43 | 1104 | |
c4e77376 | 1105 | mutex_unlock(&chip->mutex); |
1da177e4 | 1106 | msleep(1000); |
c4e77376 | 1107 | mutex_lock(&chip->mutex); |
1da177e4 LT |
1108 | |
1109 | /* FIXME. Use a timer to check this, and return immediately. */ | |
1110 | /* Once the state machine's known to be working I'll do that */ | |
1111 | ||
1112 | timeo = jiffies + (HZ*2); | |
1113 | for (;;) { | |
1114 | ||
1115 | status = map_read(map, adr); | |
1116 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
1117 | break; | |
1f948b43 | 1118 | |
1da177e4 LT |
1119 | /* OK Still waiting */ |
1120 | if (time_after(jiffies, timeo)) { | |
1121 | map_write(map, CMD(0x70), adr); | |
1122 | chip->state = FL_STATUS; | |
1123 | printk(KERN_ERR "waiting for lock to complete timed out. Xstatus = %lx, status = %lx.\n", status.x[0], map_read(map, adr).x[0]); | |
1124 | DISABLE_VPP(map); | |
c4e77376 | 1125 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1126 | return -EIO; |
1127 | } | |
1f948b43 | 1128 | |
1da177e4 | 1129 | /* Latency issues. Drop the lock, wait a while and retry */ |
c4e77376 | 1130 | mutex_unlock(&chip->mutex); |
1da177e4 | 1131 | cfi_udelay(1); |
c4e77376 | 1132 | mutex_lock(&chip->mutex); |
1da177e4 | 1133 | } |
1f948b43 | 1134 | |
1da177e4 LT |
1135 | /* Done and happy. */ |
1136 | chip->state = FL_STATUS; | |
1137 | DISABLE_VPP(map); | |
1138 | wake_up(&chip->wq); | |
c4e77376 | 1139 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1140 | return 0; |
1141 | } | |
69423d99 | 1142 | static int cfi_staa_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) |
1da177e4 LT |
1143 | { |
1144 | struct map_info *map = mtd->priv; | |
1145 | struct cfi_private *cfi = map->fldrv_priv; | |
1146 | unsigned long adr; | |
1147 | int chipnum, ret = 0; | |
1148 | #ifdef DEBUG_LOCK_BITS | |
1149 | int ofs_factor = cfi->interleave * cfi->device_type; | |
1150 | #endif | |
1151 | ||
1152 | if (ofs & (mtd->erasesize - 1)) | |
1153 | return -EINVAL; | |
1154 | ||
1155 | if (len & (mtd->erasesize -1)) | |
1156 | return -EINVAL; | |
1157 | ||
1158 | if ((len + ofs) > mtd->size) | |
1159 | return -EINVAL; | |
1160 | ||
1161 | chipnum = ofs >> cfi->chipshift; | |
1162 | adr = ofs - (chipnum << cfi->chipshift); | |
1163 | ||
1164 | while(len) { | |
1165 | ||
1166 | #ifdef DEBUG_LOCK_BITS | |
1167 | cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL); | |
1168 | printk("before lock: block status register is %x\n",cfi_read_query(map, adr+(2*ofs_factor))); | |
1169 | cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL); | |
1170 | #endif | |
1171 | ||
1172 | ret = do_lock_oneblock(map, &cfi->chips[chipnum], adr); | |
1173 | ||
1174 | #ifdef DEBUG_LOCK_BITS | |
1175 | cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL); | |
1176 | printk("after lock: block status register is %x\n",cfi_read_query(map, adr+(2*ofs_factor))); | |
1177 | cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL); | |
1f948b43 TG |
1178 | #endif |
1179 | ||
1da177e4 LT |
1180 | if (ret) |
1181 | return ret; | |
1182 | ||
1183 | adr += mtd->erasesize; | |
1184 | len -= mtd->erasesize; | |
1185 | ||
1186 | if (adr >> cfi->chipshift) { | |
1187 | adr = 0; | |
1188 | chipnum++; | |
1f948b43 | 1189 | |
1da177e4 LT |
1190 | if (chipnum >= cfi->numchips) |
1191 | break; | |
1192 | } | |
1193 | } | |
1194 | return 0; | |
1195 | } | |
1196 | static inline int do_unlock_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr) | |
1197 | { | |
1198 | struct cfi_private *cfi = map->fldrv_priv; | |
1199 | map_word status, status_OK; | |
1200 | unsigned long timeo = jiffies + HZ; | |
1201 | DECLARE_WAITQUEUE(wait, current); | |
1202 | ||
1203 | adr += chip->start; | |
1204 | ||
1205 | /* Let's determine this according to the interleave only once */ | |
1206 | status_OK = CMD(0x80); | |
1207 | ||
1208 | timeo = jiffies + HZ; | |
1209 | retry: | |
c4e77376 | 1210 | mutex_lock(&chip->mutex); |
1da177e4 LT |
1211 | |
1212 | /* Check that the chip's ready to talk to us. */ | |
1213 | switch (chip->state) { | |
1214 | case FL_CFI_QUERY: | |
1215 | case FL_JEDEC_QUERY: | |
1216 | case FL_READY: | |
1217 | map_write(map, CMD(0x70), adr); | |
1218 | chip->state = FL_STATUS; | |
1219 | ||
1220 | case FL_STATUS: | |
1221 | status = map_read(map, adr); | |
1222 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
1223 | break; | |
1f948b43 | 1224 | |
1da177e4 LT |
1225 | /* Urgh. Chip not yet ready to talk to us. */ |
1226 | if (time_after(jiffies, timeo)) { | |
c4e77376 | 1227 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1228 | printk(KERN_ERR "waiting for chip to be ready timed out in unlock\n"); |
1229 | return -EIO; | |
1230 | } | |
1231 | ||
1232 | /* Latency issues. Drop the lock, wait a while and retry */ | |
c4e77376 | 1233 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1234 | cfi_udelay(1); |
1235 | goto retry; | |
1236 | ||
1237 | default: | |
1238 | /* Stick ourselves on a wait queue to be woken when | |
1239 | someone changes the status */ | |
1240 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1241 | add_wait_queue(&chip->wq, &wait); | |
c4e77376 | 1242 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1243 | schedule(); |
1244 | remove_wait_queue(&chip->wq, &wait); | |
1245 | timeo = jiffies + HZ; | |
1246 | goto retry; | |
1247 | } | |
1248 | ||
1249 | ENABLE_VPP(map); | |
1250 | map_write(map, CMD(0x60), adr); | |
1251 | map_write(map, CMD(0xD0), adr); | |
1252 | chip->state = FL_UNLOCKING; | |
1f948b43 | 1253 | |
c4e77376 | 1254 | mutex_unlock(&chip->mutex); |
1da177e4 | 1255 | msleep(1000); |
c4e77376 | 1256 | mutex_lock(&chip->mutex); |
1da177e4 LT |
1257 | |
1258 | /* FIXME. Use a timer to check this, and return immediately. */ | |
1259 | /* Once the state machine's known to be working I'll do that */ | |
1260 | ||
1261 | timeo = jiffies + (HZ*2); | |
1262 | for (;;) { | |
1263 | ||
1264 | status = map_read(map, adr); | |
1265 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
1266 | break; | |
1f948b43 | 1267 | |
1da177e4 LT |
1268 | /* OK Still waiting */ |
1269 | if (time_after(jiffies, timeo)) { | |
1270 | map_write(map, CMD(0x70), adr); | |
1271 | chip->state = FL_STATUS; | |
1272 | printk(KERN_ERR "waiting for unlock to complete timed out. Xstatus = %lx, status = %lx.\n", status.x[0], map_read(map, adr).x[0]); | |
1273 | DISABLE_VPP(map); | |
c4e77376 | 1274 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1275 | return -EIO; |
1276 | } | |
1f948b43 | 1277 | |
1da177e4 | 1278 | /* Latency issues. Drop the unlock, wait a while and retry */ |
c4e77376 | 1279 | mutex_unlock(&chip->mutex); |
1da177e4 | 1280 | cfi_udelay(1); |
c4e77376 | 1281 | mutex_lock(&chip->mutex); |
1da177e4 | 1282 | } |
1f948b43 | 1283 | |
1da177e4 LT |
1284 | /* Done and happy. */ |
1285 | chip->state = FL_STATUS; | |
1286 | DISABLE_VPP(map); | |
1287 | wake_up(&chip->wq); | |
c4e77376 | 1288 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1289 | return 0; |
1290 | } | |
69423d99 | 1291 | static int cfi_staa_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) |
1da177e4 LT |
1292 | { |
1293 | struct map_info *map = mtd->priv; | |
1294 | struct cfi_private *cfi = map->fldrv_priv; | |
1295 | unsigned long adr; | |
1296 | int chipnum, ret = 0; | |
1297 | #ifdef DEBUG_LOCK_BITS | |
1298 | int ofs_factor = cfi->interleave * cfi->device_type; | |
1299 | #endif | |
1300 | ||
1301 | chipnum = ofs >> cfi->chipshift; | |
1302 | adr = ofs - (chipnum << cfi->chipshift); | |
1303 | ||
1304 | #ifdef DEBUG_LOCK_BITS | |
1305 | { | |
1306 | unsigned long temp_adr = adr; | |
1307 | unsigned long temp_len = len; | |
1f948b43 | 1308 | |
1da177e4 LT |
1309 | cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL); |
1310 | while (temp_len) { | |
1311 | printk("before unlock %x: block status register is %x\n",temp_adr,cfi_read_query(map, temp_adr+(2*ofs_factor))); | |
1312 | temp_adr += mtd->erasesize; | |
1313 | temp_len -= mtd->erasesize; | |
1314 | } | |
1315 | cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL); | |
1316 | } | |
1317 | #endif | |
1318 | ||
1319 | ret = do_unlock_oneblock(map, &cfi->chips[chipnum], adr); | |
1320 | ||
1321 | #ifdef DEBUG_LOCK_BITS | |
1322 | cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL); | |
1323 | printk("after unlock: block status register is %x\n",cfi_read_query(map, adr+(2*ofs_factor))); | |
1324 | cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL); | |
1325 | #endif | |
1f948b43 | 1326 | |
1da177e4 LT |
1327 | return ret; |
1328 | } | |
1329 | ||
1330 | static int cfi_staa_suspend(struct mtd_info *mtd) | |
1331 | { | |
1332 | struct map_info *map = mtd->priv; | |
1333 | struct cfi_private *cfi = map->fldrv_priv; | |
1334 | int i; | |
1335 | struct flchip *chip; | |
1336 | int ret = 0; | |
1337 | ||
1338 | for (i=0; !ret && i<cfi->numchips; i++) { | |
1339 | chip = &cfi->chips[i]; | |
1340 | ||
c4e77376 | 1341 | mutex_lock(&chip->mutex); |
1da177e4 LT |
1342 | |
1343 | switch(chip->state) { | |
1344 | case FL_READY: | |
1345 | case FL_STATUS: | |
1346 | case FL_CFI_QUERY: | |
1347 | case FL_JEDEC_QUERY: | |
1348 | chip->oldstate = chip->state; | |
1349 | chip->state = FL_PM_SUSPENDED; | |
1f948b43 | 1350 | /* No need to wake_up() on this state change - |
1da177e4 LT |
1351 | * as the whole point is that nobody can do anything |
1352 | * with the chip now anyway. | |
1353 | */ | |
1354 | case FL_PM_SUSPENDED: | |
1355 | break; | |
1356 | ||
1357 | default: | |
1358 | ret = -EAGAIN; | |
1359 | break; | |
1360 | } | |
c4e77376 | 1361 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1362 | } |
1363 | ||
1364 | /* Unlock the chips again */ | |
1365 | ||
1366 | if (ret) { | |
1367 | for (i--; i >=0; i--) { | |
1368 | chip = &cfi->chips[i]; | |
1f948b43 | 1369 | |
c4e77376 | 1370 | mutex_lock(&chip->mutex); |
1f948b43 | 1371 | |
1da177e4 LT |
1372 | if (chip->state == FL_PM_SUSPENDED) { |
1373 | /* No need to force it into a known state here, | |
1374 | because we're returning failure, and it didn't | |
1375 | get power cycled */ | |
1376 | chip->state = chip->oldstate; | |
1377 | wake_up(&chip->wq); | |
1378 | } | |
c4e77376 | 1379 | mutex_unlock(&chip->mutex); |
1da177e4 | 1380 | } |
1f948b43 TG |
1381 | } |
1382 | ||
1da177e4 LT |
1383 | return ret; |
1384 | } | |
1385 | ||
1386 | static void cfi_staa_resume(struct mtd_info *mtd) | |
1387 | { | |
1388 | struct map_info *map = mtd->priv; | |
1389 | struct cfi_private *cfi = map->fldrv_priv; | |
1390 | int i; | |
1391 | struct flchip *chip; | |
1392 | ||
1393 | for (i=0; i<cfi->numchips; i++) { | |
1f948b43 | 1394 | |
1da177e4 LT |
1395 | chip = &cfi->chips[i]; |
1396 | ||
c4e77376 | 1397 | mutex_lock(&chip->mutex); |
1f948b43 | 1398 | |
1da177e4 LT |
1399 | /* Go to known state. Chip may have been power cycled */ |
1400 | if (chip->state == FL_PM_SUSPENDED) { | |
1401 | map_write(map, CMD(0xFF), 0); | |
1402 | chip->state = FL_READY; | |
1403 | wake_up(&chip->wq); | |
1404 | } | |
1405 | ||
c4e77376 | 1406 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1407 | } |
1408 | } | |
1409 | ||
1410 | static void cfi_staa_destroy(struct mtd_info *mtd) | |
1411 | { | |
1412 | struct map_info *map = mtd->priv; | |
1413 | struct cfi_private *cfi = map->fldrv_priv; | |
1414 | kfree(cfi->cmdset_priv); | |
1415 | kfree(cfi); | |
1416 | } | |
1417 | ||
1da177e4 | 1418 | MODULE_LICENSE("GPL"); |