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