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> | |
1da177e4 LT |
25 | #include <asm/io.h> |
26 | #include <asm/byteorder.h> | |
27 | ||
28 | #include <linux/errno.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/interrupt.h> | |
32 | #include <linux/mtd/map.h> | |
33 | #include <linux/mtd/cfi.h> | |
34 | #include <linux/mtd/mtd.h> | |
1da177e4 LT |
35 | |
36 | ||
37 | static int cfi_staa_read(struct mtd_info *, loff_t, size_t, size_t *, u_char *); | |
38 | static int cfi_staa_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); | |
39 | static int cfi_staa_writev(struct mtd_info *mtd, const struct kvec *vecs, | |
40 | unsigned long count, loff_t to, size_t *retlen); | |
41 | static int cfi_staa_erase_varsize(struct mtd_info *, struct erase_info *); | |
42 | static void cfi_staa_sync (struct mtd_info *); | |
69423d99 AH |
43 | static int cfi_staa_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len); |
44 | static int cfi_staa_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len); | |
1da177e4 LT |
45 | static int cfi_staa_suspend (struct mtd_info *); |
46 | static void cfi_staa_resume (struct mtd_info *); | |
47 | ||
48 | static void cfi_staa_destroy(struct mtd_info *); | |
49 | ||
50 | struct mtd_info *cfi_cmdset_0020(struct map_info *, int); | |
51 | ||
52 | static struct mtd_info *cfi_staa_setup (struct map_info *); | |
53 | ||
54 | static struct mtd_chip_driver cfi_staa_chipdrv = { | |
55 | .probe = NULL, /* Not usable directly */ | |
56 | .destroy = cfi_staa_destroy, | |
57 | .name = "cfi_cmdset_0020", | |
58 | .module = THIS_MODULE | |
59 | }; | |
60 | ||
61 | /* #define DEBUG_LOCK_BITS */ | |
62 | //#define DEBUG_CFI_FEATURES | |
63 | ||
64 | #ifdef DEBUG_CFI_FEATURES | |
65 | static void cfi_tell_features(struct cfi_pri_intelext *extp) | |
66 | { | |
67 | int i; | |
68 | printk(" Feature/Command Support: %4.4X\n", extp->FeatureSupport); | |
69 | printk(" - Chip Erase: %s\n", extp->FeatureSupport&1?"supported":"unsupported"); | |
70 | printk(" - Suspend Erase: %s\n", extp->FeatureSupport&2?"supported":"unsupported"); | |
71 | printk(" - Suspend Program: %s\n", extp->FeatureSupport&4?"supported":"unsupported"); | |
72 | printk(" - Legacy Lock/Unlock: %s\n", extp->FeatureSupport&8?"supported":"unsupported"); | |
73 | printk(" - Queued Erase: %s\n", extp->FeatureSupport&16?"supported":"unsupported"); | |
74 | printk(" - Instant block lock: %s\n", extp->FeatureSupport&32?"supported":"unsupported"); | |
75 | printk(" - Protection Bits: %s\n", extp->FeatureSupport&64?"supported":"unsupported"); | |
76 | printk(" - Page-mode read: %s\n", extp->FeatureSupport&128?"supported":"unsupported"); | |
77 | printk(" - Synchronous read: %s\n", extp->FeatureSupport&256?"supported":"unsupported"); | |
78 | for (i=9; i<32; i++) { | |
1f948b43 | 79 | if (extp->FeatureSupport & (1<<i)) |
1da177e4 LT |
80 | printk(" - Unknown Bit %X: supported\n", i); |
81 | } | |
1f948b43 | 82 | |
1da177e4 LT |
83 | printk(" Supported functions after Suspend: %2.2X\n", extp->SuspendCmdSupport); |
84 | printk(" - Program after Erase Suspend: %s\n", extp->SuspendCmdSupport&1?"supported":"unsupported"); | |
85 | for (i=1; i<8; i++) { | |
86 | if (extp->SuspendCmdSupport & (1<<i)) | |
87 | printk(" - Unknown Bit %X: supported\n", i); | |
88 | } | |
1f948b43 | 89 | |
1da177e4 LT |
90 | printk(" Block Status Register Mask: %4.4X\n", extp->BlkStatusRegMask); |
91 | printk(" - Lock Bit Active: %s\n", extp->BlkStatusRegMask&1?"yes":"no"); | |
92 | printk(" - Valid Bit Active: %s\n", extp->BlkStatusRegMask&2?"yes":"no"); | |
93 | for (i=2; i<16; i++) { | |
94 | if (extp->BlkStatusRegMask & (1<<i)) | |
95 | printk(" - Unknown Bit %X Active: yes\n",i); | |
96 | } | |
1f948b43 TG |
97 | |
98 | printk(" Vcc Logic Supply Optimum Program/Erase Voltage: %d.%d V\n", | |
1da177e4 LT |
99 | extp->VccOptimal >> 8, extp->VccOptimal & 0xf); |
100 | if (extp->VppOptimal) | |
1f948b43 | 101 | printk(" Vpp Programming Supply Optimum Program/Erase Voltage: %d.%d V\n", |
1da177e4 LT |
102 | extp->VppOptimal >> 8, extp->VppOptimal & 0xf); |
103 | } | |
104 | #endif | |
105 | ||
106 | /* This routine is made available to other mtd code via | |
107 | * inter_module_register. It must only be accessed through | |
108 | * inter_module_get which will bump the use count of this module. The | |
109 | * addresses passed back in cfi are valid as long as the use count of | |
110 | * this module is non-zero, i.e. between inter_module_get and | |
111 | * inter_module_put. Keith Owens <kaos@ocs.com.au> 29 Oct 2000. | |
112 | */ | |
113 | struct mtd_info *cfi_cmdset_0020(struct map_info *map, int primary) | |
114 | { | |
115 | struct cfi_private *cfi = map->fldrv_priv; | |
116 | int i; | |
117 | ||
118 | if (cfi->cfi_mode) { | |
1f948b43 | 119 | /* |
1da177e4 LT |
120 | * It's a real CFI chip, not one for which the probe |
121 | * routine faked a CFI structure. So we read the feature | |
122 | * table from it. | |
123 | */ | |
124 | __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR; | |
125 | struct cfi_pri_intelext *extp; | |
126 | ||
127 | extp = (struct cfi_pri_intelext*)cfi_read_pri(map, adr, sizeof(*extp), "ST Microelectronics"); | |
128 | if (!extp) | |
129 | return NULL; | |
130 | ||
d88f977b TP |
131 | if (extp->MajorVersion != '1' || |
132 | (extp->MinorVersion < '0' || extp->MinorVersion > '3')) { | |
133 | printk(KERN_ERR " Unknown ST Microelectronics" | |
134 | " Extended Query version %c.%c.\n", | |
135 | extp->MajorVersion, extp->MinorVersion); | |
136 | kfree(extp); | |
137 | return NULL; | |
138 | } | |
139 | ||
1da177e4 | 140 | /* Do some byteswapping if necessary */ |
8e987465 AS |
141 | extp->FeatureSupport = cfi32_to_cpu(map, extp->FeatureSupport); |
142 | extp->BlkStatusRegMask = cfi32_to_cpu(map, | |
143 | 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) { | |
1da177e4 LT |
178 | kfree(cfi->cmdset_priv); |
179 | return NULL; | |
180 | } | |
181 | ||
1da177e4 LT |
182 | mtd->priv = map; |
183 | mtd->type = MTD_NORFLASH; | |
184 | mtd->size = devsize * cfi->numchips; | |
185 | ||
186 | mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips; | |
1f948b43 | 187 | mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) |
1da177e4 | 188 | * mtd->numeraseregions, GFP_KERNEL); |
1f948b43 | 189 | if (!mtd->eraseregions) { |
1da177e4 LT |
190 | kfree(cfi->cmdset_priv); |
191 | kfree(mtd); | |
192 | return NULL; | |
193 | } | |
1f948b43 | 194 | |
1da177e4 LT |
195 | for (i=0; i<cfi->cfiq->NumEraseRegions; i++) { |
196 | unsigned long ernum, ersize; | |
197 | ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave; | |
198 | ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1; | |
199 | ||
200 | if (mtd->erasesize < ersize) { | |
201 | mtd->erasesize = ersize; | |
202 | } | |
203 | for (j=0; j<cfi->numchips; j++) { | |
204 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset; | |
205 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize; | |
206 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum; | |
207 | } | |
208 | offset += (ersize * ernum); | |
35cc3337 | 209 | } |
1da177e4 | 210 | |
35cc3337 DC |
211 | if (offset != devsize) { |
212 | /* Argh */ | |
213 | printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize); | |
214 | kfree(mtd->eraseregions); | |
215 | kfree(cfi->cmdset_priv); | |
216 | kfree(mtd); | |
217 | return NULL; | |
218 | } | |
1da177e4 | 219 | |
35cc3337 DC |
220 | for (i=0; i<mtd->numeraseregions;i++){ |
221 | printk(KERN_DEBUG "%d: offset=0x%llx,size=0x%x,blocks=%d\n", | |
222 | i, (unsigned long long)mtd->eraseregions[i].offset, | |
223 | mtd->eraseregions[i].erasesize, | |
224 | mtd->eraseregions[i].numblocks); | |
225 | } | |
1da177e4 | 226 | |
1f948b43 | 227 | /* Also select the correct geometry setup too */ |
3c3c10bb AB |
228 | mtd->_erase = cfi_staa_erase_varsize; |
229 | mtd->_read = cfi_staa_read; | |
230 | mtd->_write = cfi_staa_write_buffers; | |
231 | mtd->_writev = cfi_staa_writev; | |
232 | mtd->_sync = cfi_staa_sync; | |
233 | mtd->_lock = cfi_staa_lock; | |
234 | mtd->_unlock = cfi_staa_unlock; | |
235 | mtd->_suspend = cfi_staa_suspend; | |
236 | mtd->_resume = cfi_staa_resume; | |
5fa43394 | 237 | mtd->flags = MTD_CAP_NORFLASH & ~MTD_BIT_WRITEABLE; |
c8b229de | 238 | mtd->writesize = 8; /* FIXME: Should be 0 for STMicro flashes w/out ECC */ |
13ce77f4 | 239 | mtd->writebufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; |
1da177e4 LT |
240 | map->fldrv = &cfi_staa_chipdrv; |
241 | __module_get(THIS_MODULE); | |
242 | mtd->name = map->name; | |
243 | return mtd; | |
244 | } | |
245 | ||
246 | ||
247 | static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) | |
248 | { | |
249 | map_word status, status_OK; | |
250 | unsigned long timeo; | |
251 | DECLARE_WAITQUEUE(wait, current); | |
252 | int suspended = 0; | |
253 | unsigned long cmd_addr; | |
254 | struct cfi_private *cfi = map->fldrv_priv; | |
255 | ||
256 | adr += chip->start; | |
257 | ||
1f948b43 TG |
258 | /* Ensure cmd read/writes are aligned. */ |
259 | cmd_addr = adr & ~(map_bankwidth(map)-1); | |
1da177e4 LT |
260 | |
261 | /* Let's determine this according to the interleave only once */ | |
262 | status_OK = CMD(0x80); | |
263 | ||
264 | timeo = jiffies + HZ; | |
265 | retry: | |
c4e77376 | 266 | mutex_lock(&chip->mutex); |
1da177e4 LT |
267 | |
268 | /* Check that the chip's ready to talk to us. | |
269 | * If it's in FL_ERASING state, suspend it and make it talk now. | |
270 | */ | |
271 | switch (chip->state) { | |
272 | case FL_ERASING: | |
273 | if (!(((struct cfi_pri_intelext *)cfi->cmdset_priv)->FeatureSupport & 2)) | |
274 | goto sleep; /* We don't support erase suspend */ | |
1f948b43 | 275 | |
1da177e4 LT |
276 | map_write (map, CMD(0xb0), cmd_addr); |
277 | /* If the flash has finished erasing, then 'erase suspend' | |
278 | * appears to make some (28F320) flash devices switch to | |
279 | * 'read' mode. Make sure that we switch to 'read status' | |
280 | * mode so we get the right data. --rmk | |
281 | */ | |
282 | map_write(map, CMD(0x70), cmd_addr); | |
283 | chip->oldstate = FL_ERASING; | |
284 | chip->state = FL_ERASE_SUSPENDING; | |
285 | // printk("Erase suspending at 0x%lx\n", cmd_addr); | |
286 | for (;;) { | |
287 | status = map_read(map, cmd_addr); | |
288 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
289 | break; | |
1f948b43 | 290 | |
1da177e4 LT |
291 | if (time_after(jiffies, timeo)) { |
292 | /* Urgh */ | |
293 | map_write(map, CMD(0xd0), cmd_addr); | |
294 | /* make sure we're in 'read status' mode */ | |
295 | map_write(map, CMD(0x70), cmd_addr); | |
296 | chip->state = FL_ERASING; | |
100f2341 | 297 | wake_up(&chip->wq); |
c4e77376 | 298 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
299 | printk(KERN_ERR "Chip not ready after erase " |
300 | "suspended: status = 0x%lx\n", status.x[0]); | |
301 | return -EIO; | |
302 | } | |
1f948b43 | 303 | |
c4e77376 | 304 | mutex_unlock(&chip->mutex); |
1da177e4 | 305 | cfi_udelay(1); |
c4e77376 | 306 | mutex_lock(&chip->mutex); |
1da177e4 | 307 | } |
1f948b43 | 308 | |
1da177e4 LT |
309 | suspended = 1; |
310 | map_write(map, CMD(0xff), cmd_addr); | |
311 | chip->state = FL_READY; | |
312 | break; | |
1f948b43 | 313 | |
1da177e4 LT |
314 | #if 0 |
315 | case FL_WRITING: | |
316 | /* Not quite yet */ | |
317 | #endif | |
318 | ||
319 | case FL_READY: | |
320 | break; | |
321 | ||
322 | case FL_CFI_QUERY: | |
323 | case FL_JEDEC_QUERY: | |
324 | map_write(map, CMD(0x70), cmd_addr); | |
325 | chip->state = FL_STATUS; | |
326 | ||
327 | case FL_STATUS: | |
328 | status = map_read(map, cmd_addr); | |
329 | if (map_word_andequal(map, status, status_OK, status_OK)) { | |
330 | map_write(map, CMD(0xff), cmd_addr); | |
331 | chip->state = FL_READY; | |
332 | break; | |
333 | } | |
1f948b43 | 334 | |
1da177e4 LT |
335 | /* Urgh. Chip not yet ready to talk to us. */ |
336 | if (time_after(jiffies, timeo)) { | |
c4e77376 | 337 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
338 | printk(KERN_ERR "waiting for chip to be ready timed out in read. WSM status = %lx\n", status.x[0]); |
339 | return -EIO; | |
340 | } | |
341 | ||
342 | /* Latency issues. Drop the lock, wait a while and retry */ | |
c4e77376 | 343 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
344 | cfi_udelay(1); |
345 | goto retry; | |
346 | ||
347 | default: | |
348 | sleep: | |
349 | /* Stick ourselves on a wait queue to be woken when | |
350 | someone changes the status */ | |
351 | set_current_state(TASK_UNINTERRUPTIBLE); | |
352 | add_wait_queue(&chip->wq, &wait); | |
c4e77376 | 353 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
354 | schedule(); |
355 | remove_wait_queue(&chip->wq, &wait); | |
356 | timeo = jiffies + HZ; | |
357 | goto retry; | |
358 | } | |
359 | ||
360 | map_copy_from(map, buf, adr, len); | |
361 | ||
362 | if (suspended) { | |
363 | chip->state = chip->oldstate; | |
1f948b43 | 364 | /* What if one interleaved chip has finished and the |
1da177e4 | 365 | other hasn't? The old code would leave the finished |
1f948b43 | 366 | one in READY mode. That's bad, and caused -EROFS |
1da177e4 LT |
367 | errors to be returned from do_erase_oneblock because |
368 | that's the only bit it checked for at the time. | |
1f948b43 | 369 | As the state machine appears to explicitly allow |
1da177e4 | 370 | sending the 0x70 (Read Status) command to an erasing |
1f948b43 | 371 | chip and expecting it to be ignored, that's what we |
1da177e4 LT |
372 | do. */ |
373 | map_write(map, CMD(0xd0), cmd_addr); | |
1f948b43 | 374 | map_write(map, CMD(0x70), cmd_addr); |
1da177e4 LT |
375 | } |
376 | ||
377 | wake_up(&chip->wq); | |
c4e77376 | 378 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
379 | return 0; |
380 | } | |
381 | ||
382 | static int cfi_staa_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) | |
383 | { | |
384 | struct map_info *map = mtd->priv; | |
385 | struct cfi_private *cfi = map->fldrv_priv; | |
386 | unsigned long ofs; | |
387 | int chipnum; | |
388 | int ret = 0; | |
389 | ||
390 | /* ofs: offset within the first chip that the first read should start */ | |
391 | chipnum = (from >> cfi->chipshift); | |
392 | ofs = from - (chipnum << cfi->chipshift); | |
393 | ||
1da177e4 LT |
394 | while (len) { |
395 | unsigned long thislen; | |
396 | ||
397 | if (chipnum >= cfi->numchips) | |
398 | break; | |
399 | ||
400 | if ((len + ofs -1) >> cfi->chipshift) | |
401 | thislen = (1<<cfi->chipshift) - ofs; | |
402 | else | |
403 | thislen = len; | |
404 | ||
405 | ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); | |
406 | if (ret) | |
407 | break; | |
408 | ||
409 | *retlen += thislen; | |
410 | len -= thislen; | |
411 | buf += thislen; | |
1f948b43 | 412 | |
1da177e4 LT |
413 | ofs = 0; |
414 | chipnum++; | |
415 | } | |
416 | return ret; | |
417 | } | |
418 | ||
21a190b9 | 419 | static int do_write_buffer(struct map_info *map, struct flchip *chip, |
1da177e4 LT |
420 | unsigned long adr, const u_char *buf, int len) |
421 | { | |
422 | struct cfi_private *cfi = map->fldrv_priv; | |
423 | map_word status, status_OK; | |
424 | unsigned long cmd_adr, timeo; | |
425 | DECLARE_WAITQUEUE(wait, current); | |
426 | int wbufsize, z; | |
1f948b43 | 427 | |
1da177e4 LT |
428 | /* M58LW064A requires bus alignment for buffer wriets -- saw */ |
429 | if (adr & (map_bankwidth(map)-1)) | |
430 | return -EINVAL; | |
431 | ||
432 | wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; | |
433 | adr += chip->start; | |
434 | cmd_adr = adr & ~(wbufsize-1); | |
1f948b43 | 435 | |
1da177e4 LT |
436 | /* Let's determine this according to the interleave only once */ |
437 | status_OK = CMD(0x80); | |
1f948b43 | 438 | |
1da177e4 LT |
439 | timeo = jiffies + HZ; |
440 | retry: | |
441 | ||
442 | #ifdef DEBUG_CFI_FEATURES | |
cb53b3b9 | 443 | printk("%s: chip->state[%d]\n", __func__, chip->state); |
1da177e4 | 444 | #endif |
c4e77376 | 445 | mutex_lock(&chip->mutex); |
1f948b43 | 446 | |
1da177e4 LT |
447 | /* Check that the chip's ready to talk to us. |
448 | * Later, we can actually think about interrupting it | |
449 | * if it's in FL_ERASING state. | |
450 | * Not just yet, though. | |
451 | */ | |
452 | switch (chip->state) { | |
453 | case FL_READY: | |
454 | break; | |
1f948b43 | 455 | |
1da177e4 LT |
456 | case FL_CFI_QUERY: |
457 | case FL_JEDEC_QUERY: | |
458 | map_write(map, CMD(0x70), cmd_adr); | |
459 | chip->state = FL_STATUS; | |
460 | #ifdef DEBUG_CFI_FEATURES | |
cb53b3b9 | 461 | printk("%s: 1 status[%x]\n", __func__, map_read(map, cmd_adr)); |
1da177e4 LT |
462 | #endif |
463 | ||
464 | case FL_STATUS: | |
465 | status = map_read(map, cmd_adr); | |
466 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
467 | break; | |
468 | /* Urgh. Chip not yet ready to talk to us. */ | |
469 | if (time_after(jiffies, timeo)) { | |
c4e77376 | 470 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
471 | printk(KERN_ERR "waiting for chip to be ready timed out in buffer write Xstatus = %lx, status = %lx\n", |
472 | status.x[0], map_read(map, cmd_adr).x[0]); | |
473 | return -EIO; | |
474 | } | |
475 | ||
476 | /* Latency issues. Drop the lock, wait a while and retry */ | |
c4e77376 | 477 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
478 | cfi_udelay(1); |
479 | goto retry; | |
480 | ||
481 | default: | |
482 | /* Stick ourselves on a wait queue to be woken when | |
483 | someone changes the status */ | |
484 | set_current_state(TASK_UNINTERRUPTIBLE); | |
485 | add_wait_queue(&chip->wq, &wait); | |
c4e77376 | 486 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
487 | schedule(); |
488 | remove_wait_queue(&chip->wq, &wait); | |
489 | timeo = jiffies + HZ; | |
490 | goto retry; | |
491 | } | |
492 | ||
493 | ENABLE_VPP(map); | |
494 | map_write(map, CMD(0xe8), cmd_adr); | |
495 | chip->state = FL_WRITING_TO_BUFFER; | |
496 | ||
497 | z = 0; | |
498 | for (;;) { | |
499 | status = map_read(map, cmd_adr); | |
500 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
501 | break; | |
502 | ||
c4e77376 | 503 | mutex_unlock(&chip->mutex); |
1da177e4 | 504 | cfi_udelay(1); |
c4e77376 | 505 | mutex_lock(&chip->mutex); |
1da177e4 LT |
506 | |
507 | if (++z > 100) { | |
508 | /* Argh. Not ready for write to buffer */ | |
509 | DISABLE_VPP(map); | |
510 | map_write(map, CMD(0x70), cmd_adr); | |
511 | chip->state = FL_STATUS; | |
c4e77376 | 512 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
513 | printk(KERN_ERR "Chip not ready for buffer write. Xstatus = %lx\n", status.x[0]); |
514 | return -EIO; | |
515 | } | |
516 | } | |
517 | ||
518 | /* Write length of data to come */ | |
519 | map_write(map, CMD(len/map_bankwidth(map)-1), cmd_adr ); | |
1f948b43 | 520 | |
1da177e4 LT |
521 | /* Write data */ |
522 | for (z = 0; z < len; | |
523 | z += map_bankwidth(map), buf += map_bankwidth(map)) { | |
524 | map_word d; | |
525 | d = map_word_load(map, buf); | |
526 | map_write(map, d, adr+z); | |
527 | } | |
528 | /* GO GO GO */ | |
529 | map_write(map, CMD(0xd0), cmd_adr); | |
530 | chip->state = FL_WRITING; | |
531 | ||
c4e77376 | 532 | mutex_unlock(&chip->mutex); |
1da177e4 | 533 | cfi_udelay(chip->buffer_write_time); |
c4e77376 | 534 | mutex_lock(&chip->mutex); |
1da177e4 LT |
535 | |
536 | timeo = jiffies + (HZ/2); | |
537 | z = 0; | |
538 | for (;;) { | |
539 | if (chip->state != FL_WRITING) { | |
540 | /* Someone's suspended the write. Sleep */ | |
541 | set_current_state(TASK_UNINTERRUPTIBLE); | |
542 | add_wait_queue(&chip->wq, &wait); | |
c4e77376 | 543 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
544 | schedule(); |
545 | remove_wait_queue(&chip->wq, &wait); | |
546 | timeo = jiffies + (HZ / 2); /* FIXME */ | |
c4e77376 | 547 | mutex_lock(&chip->mutex); |
1da177e4 LT |
548 | continue; |
549 | } | |
550 | ||
551 | status = map_read(map, cmd_adr); | |
552 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
553 | break; | |
554 | ||
555 | /* OK Still waiting */ | |
556 | if (time_after(jiffies, timeo)) { | |
557 | /* clear status */ | |
558 | map_write(map, CMD(0x50), cmd_adr); | |
559 | /* put back into read status register mode */ | |
560 | map_write(map, CMD(0x70), adr); | |
561 | chip->state = FL_STATUS; | |
562 | DISABLE_VPP(map); | |
c4e77376 | 563 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
564 | printk(KERN_ERR "waiting for chip to be ready timed out in bufwrite\n"); |
565 | return -EIO; | |
566 | } | |
1f948b43 | 567 | |
1da177e4 | 568 | /* Latency issues. Drop the lock, wait a while and retry */ |
c4e77376 | 569 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
570 | cfi_udelay(1); |
571 | z++; | |
c4e77376 | 572 | mutex_lock(&chip->mutex); |
1da177e4 LT |
573 | } |
574 | if (!z) { | |
575 | chip->buffer_write_time--; | |
576 | if (!chip->buffer_write_time) | |
577 | chip->buffer_write_time++; | |
578 | } | |
1f948b43 | 579 | if (z > 1) |
1da177e4 | 580 | chip->buffer_write_time++; |
1f948b43 | 581 | |
1da177e4 LT |
582 | /* Done and happy. */ |
583 | DISABLE_VPP(map); | |
584 | chip->state = FL_STATUS; | |
585 | ||
586 | /* check for errors: 'lock bit', 'VPP', 'dead cell'/'unerased cell' or 'incorrect cmd' -- saw */ | |
587 | if (map_word_bitsset(map, status, CMD(0x3a))) { | |
588 | #ifdef DEBUG_CFI_FEATURES | |
cb53b3b9 | 589 | printk("%s: 2 status[%lx]\n", __func__, status.x[0]); |
1da177e4 LT |
590 | #endif |
591 | /* clear status */ | |
592 | map_write(map, CMD(0x50), cmd_adr); | |
593 | /* put back into read status register mode */ | |
594 | map_write(map, CMD(0x70), adr); | |
595 | wake_up(&chip->wq); | |
c4e77376 | 596 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
597 | return map_word_bitsset(map, status, CMD(0x02)) ? -EROFS : -EIO; |
598 | } | |
599 | wake_up(&chip->wq); | |
c4e77376 | 600 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
601 | |
602 | return 0; | |
603 | } | |
604 | ||
1f948b43 | 605 | static int cfi_staa_write_buffers (struct mtd_info *mtd, loff_t to, |
1da177e4 LT |
606 | size_t len, size_t *retlen, const u_char *buf) |
607 | { | |
608 | struct map_info *map = mtd->priv; | |
609 | struct cfi_private *cfi = map->fldrv_priv; | |
610 | int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; | |
611 | int ret = 0; | |
612 | int chipnum; | |
613 | unsigned long ofs; | |
614 | ||
1da177e4 LT |
615 | chipnum = to >> cfi->chipshift; |
616 | ofs = to - (chipnum << cfi->chipshift); | |
617 | ||
618 | #ifdef DEBUG_CFI_FEATURES | |
cb53b3b9 HH |
619 | printk("%s: map_bankwidth(map)[%x]\n", __func__, map_bankwidth(map)); |
620 | printk("%s: chipnum[%x] wbufsize[%x]\n", __func__, chipnum, wbufsize); | |
621 | printk("%s: ofs[%x] len[%x]\n", __func__, ofs, len); | |
1da177e4 | 622 | #endif |
1f948b43 | 623 | |
1da177e4 LT |
624 | /* Write buffer is worth it only if more than one word to write... */ |
625 | while (len > 0) { | |
626 | /* We must not cross write block boundaries */ | |
627 | int size = wbufsize - (ofs & (wbufsize-1)); | |
628 | ||
629 | if (size > len) | |
630 | size = len; | |
631 | ||
1f948b43 | 632 | ret = do_write_buffer(map, &cfi->chips[chipnum], |
1da177e4 LT |
633 | ofs, buf, size); |
634 | if (ret) | |
635 | return ret; | |
636 | ||
637 | ofs += size; | |
638 | buf += size; | |
639 | (*retlen) += size; | |
640 | len -= size; | |
641 | ||
642 | if (ofs >> cfi->chipshift) { | |
1f948b43 | 643 | chipnum ++; |
1da177e4 LT |
644 | ofs = 0; |
645 | if (chipnum == cfi->numchips) | |
646 | return 0; | |
647 | } | |
648 | } | |
1f948b43 | 649 | |
1da177e4 LT |
650 | return 0; |
651 | } | |
652 | ||
653 | /* | |
654 | * Writev for ECC-Flashes is a little more complicated. We need to maintain | |
655 | * a small buffer for this. | |
656 | * XXX: If the buffer size is not a multiple of 2, this will break | |
657 | */ | |
992c9d24 | 658 | #define ECCBUF_SIZE (mtd->writesize) |
1da177e4 LT |
659 | #define ECCBUF_DIV(x) ((x) & ~(ECCBUF_SIZE - 1)) |
660 | #define ECCBUF_MOD(x) ((x) & (ECCBUF_SIZE - 1)) | |
661 | static int | |
662 | cfi_staa_writev(struct mtd_info *mtd, const struct kvec *vecs, | |
663 | unsigned long count, loff_t to, size_t *retlen) | |
664 | { | |
665 | unsigned long i; | |
666 | size_t totlen = 0, thislen; | |
667 | int ret = 0; | |
668 | size_t buflen = 0; | |
669 | static char *buffer; | |
670 | ||
671 | if (!ECCBUF_SIZE) { | |
672 | /* We should fall back to a general writev implementation. | |
673 | * Until that is written, just break. | |
674 | */ | |
675 | return -EIO; | |
676 | } | |
677 | buffer = kmalloc(ECCBUF_SIZE, GFP_KERNEL); | |
678 | if (!buffer) | |
679 | return -ENOMEM; | |
680 | ||
681 | for (i=0; i<count; i++) { | |
682 | size_t elem_len = vecs[i].iov_len; | |
683 | void *elem_base = vecs[i].iov_base; | |
684 | if (!elem_len) /* FIXME: Might be unnecessary. Check that */ | |
685 | continue; | |
686 | if (buflen) { /* cut off head */ | |
687 | if (buflen + elem_len < ECCBUF_SIZE) { /* just accumulate */ | |
688 | memcpy(buffer+buflen, elem_base, elem_len); | |
689 | buflen += elem_len; | |
690 | continue; | |
691 | } | |
692 | memcpy(buffer+buflen, elem_base, ECCBUF_SIZE-buflen); | |
eda95cbf AB |
693 | ret = mtd_write(mtd, to, ECCBUF_SIZE, &thislen, |
694 | buffer); | |
1da177e4 LT |
695 | totlen += thislen; |
696 | if (ret || thislen != ECCBUF_SIZE) | |
697 | goto write_error; | |
698 | elem_len -= thislen-buflen; | |
699 | elem_base += thislen-buflen; | |
700 | to += ECCBUF_SIZE; | |
701 | } | |
702 | if (ECCBUF_DIV(elem_len)) { /* write clean aligned data */ | |
eda95cbf AB |
703 | ret = mtd_write(mtd, to, ECCBUF_DIV(elem_len), |
704 | &thislen, elem_base); | |
1da177e4 LT |
705 | totlen += thislen; |
706 | if (ret || thislen != ECCBUF_DIV(elem_len)) | |
707 | goto write_error; | |
708 | to += thislen; | |
709 | } | |
710 | buflen = ECCBUF_MOD(elem_len); /* cut off tail */ | |
711 | if (buflen) { | |
712 | memset(buffer, 0xff, ECCBUF_SIZE); | |
713 | memcpy(buffer, elem_base + thislen, buflen); | |
714 | } | |
715 | } | |
716 | if (buflen) { /* flush last page, even if not full */ | |
717 | /* This is sometimes intended behaviour, really */ | |
eda95cbf | 718 | ret = mtd_write(mtd, to, buflen, &thislen, buffer); |
1da177e4 LT |
719 | totlen += thislen; |
720 | if (ret || thislen != ECCBUF_SIZE) | |
721 | goto write_error; | |
722 | } | |
723 | write_error: | |
724 | if (retlen) | |
725 | *retlen = totlen; | |
6a8b4d31 | 726 | kfree(buffer); |
1da177e4 LT |
727 | return ret; |
728 | } | |
729 | ||
730 | ||
731 | static inline int do_erase_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr) | |
732 | { | |
733 | struct cfi_private *cfi = map->fldrv_priv; | |
734 | map_word status, status_OK; | |
735 | unsigned long timeo; | |
736 | int retries = 3; | |
737 | DECLARE_WAITQUEUE(wait, current); | |
738 | int ret = 0; | |
739 | ||
740 | adr += chip->start; | |
741 | ||
742 | /* Let's determine this according to the interleave only once */ | |
743 | status_OK = CMD(0x80); | |
744 | ||
745 | timeo = jiffies + HZ; | |
746 | retry: | |
c4e77376 | 747 | mutex_lock(&chip->mutex); |
1da177e4 LT |
748 | |
749 | /* Check that the chip's ready to talk to us. */ | |
750 | switch (chip->state) { | |
751 | case FL_CFI_QUERY: | |
752 | case FL_JEDEC_QUERY: | |
753 | case FL_READY: | |
754 | map_write(map, CMD(0x70), adr); | |
755 | chip->state = FL_STATUS; | |
756 | ||
757 | case FL_STATUS: | |
758 | status = map_read(map, adr); | |
759 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
760 | break; | |
1f948b43 | 761 | |
1da177e4 LT |
762 | /* Urgh. Chip not yet ready to talk to us. */ |
763 | if (time_after(jiffies, timeo)) { | |
c4e77376 | 764 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
765 | printk(KERN_ERR "waiting for chip to be ready timed out in erase\n"); |
766 | return -EIO; | |
767 | } | |
768 | ||
769 | /* Latency issues. Drop the lock, wait a while and retry */ | |
c4e77376 | 770 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
771 | cfi_udelay(1); |
772 | goto retry; | |
773 | ||
774 | default: | |
775 | /* Stick ourselves on a wait queue to be woken when | |
776 | someone changes the status */ | |
777 | set_current_state(TASK_UNINTERRUPTIBLE); | |
778 | add_wait_queue(&chip->wq, &wait); | |
c4e77376 | 779 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
780 | schedule(); |
781 | remove_wait_queue(&chip->wq, &wait); | |
782 | timeo = jiffies + HZ; | |
783 | goto retry; | |
784 | } | |
785 | ||
786 | ENABLE_VPP(map); | |
787 | /* Clear the status register first */ | |
788 | map_write(map, CMD(0x50), adr); | |
789 | ||
790 | /* Now erase */ | |
791 | map_write(map, CMD(0x20), adr); | |
792 | map_write(map, CMD(0xD0), adr); | |
793 | chip->state = FL_ERASING; | |
1f948b43 | 794 | |
c4e77376 | 795 | mutex_unlock(&chip->mutex); |
1da177e4 | 796 | msleep(1000); |
c4e77376 | 797 | mutex_lock(&chip->mutex); |
1da177e4 LT |
798 | |
799 | /* FIXME. Use a timer to check this, and return immediately. */ | |
800 | /* Once the state machine's known to be working I'll do that */ | |
801 | ||
802 | timeo = jiffies + (HZ*20); | |
803 | for (;;) { | |
804 | if (chip->state != FL_ERASING) { | |
805 | /* Someone's suspended the erase. Sleep */ | |
806 | set_current_state(TASK_UNINTERRUPTIBLE); | |
807 | add_wait_queue(&chip->wq, &wait); | |
c4e77376 | 808 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
809 | schedule(); |
810 | remove_wait_queue(&chip->wq, &wait); | |
811 | timeo = jiffies + (HZ*20); /* FIXME */ | |
c4e77376 | 812 | mutex_lock(&chip->mutex); |
1da177e4 LT |
813 | continue; |
814 | } | |
815 | ||
816 | status = map_read(map, adr); | |
817 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
818 | break; | |
1f948b43 | 819 | |
1da177e4 LT |
820 | /* OK Still waiting */ |
821 | if (time_after(jiffies, timeo)) { | |
822 | map_write(map, CMD(0x70), adr); | |
823 | chip->state = FL_STATUS; | |
824 | printk(KERN_ERR "waiting for erase to complete timed out. Xstatus = %lx, status = %lx.\n", status.x[0], map_read(map, adr).x[0]); | |
825 | DISABLE_VPP(map); | |
c4e77376 | 826 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
827 | return -EIO; |
828 | } | |
1f948b43 | 829 | |
1da177e4 | 830 | /* Latency issues. Drop the lock, wait a while and retry */ |
c4e77376 | 831 | mutex_unlock(&chip->mutex); |
1da177e4 | 832 | cfi_udelay(1); |
c4e77376 | 833 | mutex_lock(&chip->mutex); |
1da177e4 | 834 | } |
1f948b43 | 835 | |
1da177e4 LT |
836 | DISABLE_VPP(map); |
837 | ret = 0; | |
838 | ||
839 | /* We've broken this before. It doesn't hurt to be safe */ | |
840 | map_write(map, CMD(0x70), adr); | |
841 | chip->state = FL_STATUS; | |
842 | status = map_read(map, adr); | |
843 | ||
844 | /* check for lock bit */ | |
845 | if (map_word_bitsset(map, status, CMD(0x3a))) { | |
846 | unsigned char chipstatus = status.x[0]; | |
847 | if (!map_word_equal(map, status, CMD(chipstatus))) { | |
848 | int i, w; | |
849 | for (w=0; w<map_words(map); w++) { | |
850 | for (i = 0; i<cfi_interleave(cfi); i++) { | |
851 | chipstatus |= status.x[w] >> (cfi->device_type * 8); | |
852 | } | |
853 | } | |
854 | printk(KERN_WARNING "Status is not identical for all chips: 0x%lx. Merging to give 0x%02x\n", | |
855 | status.x[0], chipstatus); | |
856 | } | |
857 | /* Reset the error bits */ | |
858 | map_write(map, CMD(0x50), adr); | |
859 | map_write(map, CMD(0x70), adr); | |
1f948b43 | 860 | |
1da177e4 LT |
861 | if ((chipstatus & 0x30) == 0x30) { |
862 | printk(KERN_NOTICE "Chip reports improper command sequence: status 0x%x\n", chipstatus); | |
863 | ret = -EIO; | |
864 | } else if (chipstatus & 0x02) { | |
865 | /* Protection bit set */ | |
866 | ret = -EROFS; | |
867 | } else if (chipstatus & 0x8) { | |
868 | /* Voltage */ | |
869 | printk(KERN_WARNING "Chip reports voltage low on erase: status 0x%x\n", chipstatus); | |
870 | ret = -EIO; | |
871 | } else if (chipstatus & 0x20) { | |
872 | if (retries--) { | |
873 | printk(KERN_DEBUG "Chip erase failed at 0x%08lx: status 0x%x. Retrying...\n", adr, chipstatus); | |
874 | timeo = jiffies + HZ; | |
875 | chip->state = FL_STATUS; | |
c4e77376 | 876 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
877 | goto retry; |
878 | } | |
879 | printk(KERN_DEBUG "Chip erase failed at 0x%08lx: status 0x%x\n", adr, chipstatus); | |
880 | ret = -EIO; | |
881 | } | |
882 | } | |
883 | ||
884 | wake_up(&chip->wq); | |
c4e77376 | 885 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
886 | return ret; |
887 | } | |
888 | ||
eb8e3183 AB |
889 | static int cfi_staa_erase_varsize(struct mtd_info *mtd, |
890 | struct erase_info *instr) | |
1da177e4 LT |
891 | { struct map_info *map = mtd->priv; |
892 | struct cfi_private *cfi = map->fldrv_priv; | |
893 | unsigned long adr, len; | |
894 | int chipnum, ret = 0; | |
895 | int i, first; | |
896 | struct mtd_erase_region_info *regions = mtd->eraseregions; | |
897 | ||
1da177e4 LT |
898 | /* Check that both start and end of the requested erase are |
899 | * aligned with the erasesize at the appropriate addresses. | |
900 | */ | |
901 | ||
902 | i = 0; | |
903 | ||
1f948b43 | 904 | /* Skip all erase regions which are ended before the start of |
1da177e4 LT |
905 | the requested erase. Actually, to save on the calculations, |
906 | we skip to the first erase region which starts after the | |
907 | start of the requested erase, and then go back one. | |
908 | */ | |
1f948b43 | 909 | |
1da177e4 LT |
910 | while (i < mtd->numeraseregions && instr->addr >= regions[i].offset) |
911 | i++; | |
912 | i--; | |
913 | ||
1f948b43 | 914 | /* OK, now i is pointing at the erase region in which this |
1da177e4 LT |
915 | erase request starts. Check the start of the requested |
916 | erase range is aligned with the erase size which is in | |
917 | effect here. | |
918 | */ | |
919 | ||
920 | if (instr->addr & (regions[i].erasesize-1)) | |
921 | return -EINVAL; | |
922 | ||
923 | /* Remember the erase region we start on */ | |
924 | first = i; | |
925 | ||
926 | /* Next, check that the end of the requested erase is aligned | |
927 | * with the erase region at that address. | |
928 | */ | |
929 | ||
930 | while (i<mtd->numeraseregions && (instr->addr + instr->len) >= regions[i].offset) | |
931 | i++; | |
932 | ||
933 | /* As before, drop back one to point at the region in which | |
934 | the address actually falls | |
935 | */ | |
936 | i--; | |
1f948b43 | 937 | |
1da177e4 LT |
938 | if ((instr->addr + instr->len) & (regions[i].erasesize-1)) |
939 | return -EINVAL; | |
940 | ||
941 | chipnum = instr->addr >> cfi->chipshift; | |
942 | adr = instr->addr - (chipnum << cfi->chipshift); | |
943 | len = instr->len; | |
944 | ||
945 | i=first; | |
946 | ||
947 | while(len) { | |
948 | ret = do_erase_oneblock(map, &cfi->chips[chipnum], adr); | |
1f948b43 | 949 | |
1da177e4 LT |
950 | if (ret) |
951 | return ret; | |
952 | ||
953 | adr += regions[i].erasesize; | |
954 | len -= regions[i].erasesize; | |
955 | ||
69423d99 | 956 | if (adr % (1<< cfi->chipshift) == (((unsigned long)regions[i].offset + (regions[i].erasesize * regions[i].numblocks)) %( 1<< cfi->chipshift))) |
1da177e4 LT |
957 | i++; |
958 | ||
959 | if (adr >> cfi->chipshift) { | |
960 | adr = 0; | |
961 | chipnum++; | |
1f948b43 | 962 | |
1da177e4 | 963 | if (chipnum >= cfi->numchips) |
555b8d12 | 964 | break; |
1da177e4 LT |
965 | } |
966 | } | |
1f948b43 | 967 | |
1da177e4 LT |
968 | instr->state = MTD_ERASE_DONE; |
969 | mtd_erase_callback(instr); | |
1f948b43 | 970 | |
1da177e4 LT |
971 | return 0; |
972 | } | |
973 | ||
974 | static void cfi_staa_sync (struct mtd_info *mtd) | |
975 | { | |
976 | struct map_info *map = mtd->priv; | |
977 | struct cfi_private *cfi = map->fldrv_priv; | |
978 | int i; | |
979 | struct flchip *chip; | |
980 | int ret = 0; | |
981 | DECLARE_WAITQUEUE(wait, current); | |
982 | ||
983 | for (i=0; !ret && i<cfi->numchips; i++) { | |
984 | chip = &cfi->chips[i]; | |
985 | ||
986 | retry: | |
c4e77376 | 987 | mutex_lock(&chip->mutex); |
1da177e4 LT |
988 | |
989 | switch(chip->state) { | |
990 | case FL_READY: | |
991 | case FL_STATUS: | |
992 | case FL_CFI_QUERY: | |
993 | case FL_JEDEC_QUERY: | |
994 | chip->oldstate = chip->state; | |
995 | chip->state = FL_SYNCING; | |
1f948b43 | 996 | /* No need to wake_up() on this state change - |
1da177e4 LT |
997 | * as the whole point is that nobody can do anything |
998 | * with the chip now anyway. | |
999 | */ | |
1000 | case FL_SYNCING: | |
c4e77376 | 1001 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1002 | break; |
1003 | ||
1004 | default: | |
1005 | /* Not an idle state */ | |
f8e30e44 | 1006 | set_current_state(TASK_UNINTERRUPTIBLE); |
1da177e4 | 1007 | add_wait_queue(&chip->wq, &wait); |
1f948b43 | 1008 | |
c4e77376 | 1009 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1010 | schedule(); |
1011 | remove_wait_queue(&chip->wq, &wait); | |
1f948b43 | 1012 | |
1da177e4 LT |
1013 | goto retry; |
1014 | } | |
1015 | } | |
1016 | ||
1017 | /* Unlock the chips again */ | |
1018 | ||
1019 | for (i--; i >=0; i--) { | |
1020 | chip = &cfi->chips[i]; | |
1021 | ||
c4e77376 | 1022 | mutex_lock(&chip->mutex); |
1f948b43 | 1023 | |
1da177e4 LT |
1024 | if (chip->state == FL_SYNCING) { |
1025 | chip->state = chip->oldstate; | |
1026 | wake_up(&chip->wq); | |
1027 | } | |
c4e77376 | 1028 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1029 | } |
1030 | } | |
1031 | ||
1032 | static inline int do_lock_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr) | |
1033 | { | |
1034 | struct cfi_private *cfi = map->fldrv_priv; | |
1035 | map_word status, status_OK; | |
1036 | unsigned long timeo = jiffies + HZ; | |
1037 | DECLARE_WAITQUEUE(wait, current); | |
1038 | ||
1039 | adr += chip->start; | |
1040 | ||
1041 | /* Let's determine this according to the interleave only once */ | |
1042 | status_OK = CMD(0x80); | |
1043 | ||
1044 | timeo = jiffies + HZ; | |
1045 | retry: | |
c4e77376 | 1046 | mutex_lock(&chip->mutex); |
1da177e4 LT |
1047 | |
1048 | /* Check that the chip's ready to talk to us. */ | |
1049 | switch (chip->state) { | |
1050 | case FL_CFI_QUERY: | |
1051 | case FL_JEDEC_QUERY: | |
1052 | case FL_READY: | |
1053 | map_write(map, CMD(0x70), adr); | |
1054 | chip->state = FL_STATUS; | |
1055 | ||
1056 | case FL_STATUS: | |
1057 | status = map_read(map, adr); | |
1f948b43 | 1058 | if (map_word_andequal(map, status, status_OK, status_OK)) |
1da177e4 | 1059 | break; |
1f948b43 | 1060 | |
1da177e4 LT |
1061 | /* Urgh. Chip not yet ready to talk to us. */ |
1062 | if (time_after(jiffies, timeo)) { | |
c4e77376 | 1063 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1064 | printk(KERN_ERR "waiting for chip to be ready timed out in lock\n"); |
1065 | return -EIO; | |
1066 | } | |
1067 | ||
1068 | /* Latency issues. Drop the lock, wait a while and retry */ | |
c4e77376 | 1069 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1070 | cfi_udelay(1); |
1071 | goto retry; | |
1072 | ||
1073 | default: | |
1074 | /* Stick ourselves on a wait queue to be woken when | |
1075 | someone changes the status */ | |
1076 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1077 | add_wait_queue(&chip->wq, &wait); | |
c4e77376 | 1078 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1079 | schedule(); |
1080 | remove_wait_queue(&chip->wq, &wait); | |
1081 | timeo = jiffies + HZ; | |
1082 | goto retry; | |
1083 | } | |
1084 | ||
1085 | ENABLE_VPP(map); | |
1086 | map_write(map, CMD(0x60), adr); | |
1087 | map_write(map, CMD(0x01), adr); | |
1088 | chip->state = FL_LOCKING; | |
1f948b43 | 1089 | |
c4e77376 | 1090 | mutex_unlock(&chip->mutex); |
1da177e4 | 1091 | msleep(1000); |
c4e77376 | 1092 | mutex_lock(&chip->mutex); |
1da177e4 LT |
1093 | |
1094 | /* FIXME. Use a timer to check this, and return immediately. */ | |
1095 | /* Once the state machine's known to be working I'll do that */ | |
1096 | ||
1097 | timeo = jiffies + (HZ*2); | |
1098 | for (;;) { | |
1099 | ||
1100 | status = map_read(map, adr); | |
1101 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
1102 | break; | |
1f948b43 | 1103 | |
1da177e4 LT |
1104 | /* OK Still waiting */ |
1105 | if (time_after(jiffies, timeo)) { | |
1106 | map_write(map, CMD(0x70), adr); | |
1107 | chip->state = FL_STATUS; | |
1108 | printk(KERN_ERR "waiting for lock to complete timed out. Xstatus = %lx, status = %lx.\n", status.x[0], map_read(map, adr).x[0]); | |
1109 | DISABLE_VPP(map); | |
c4e77376 | 1110 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1111 | return -EIO; |
1112 | } | |
1f948b43 | 1113 | |
1da177e4 | 1114 | /* Latency issues. Drop the lock, wait a while and retry */ |
c4e77376 | 1115 | mutex_unlock(&chip->mutex); |
1da177e4 | 1116 | cfi_udelay(1); |
c4e77376 | 1117 | mutex_lock(&chip->mutex); |
1da177e4 | 1118 | } |
1f948b43 | 1119 | |
1da177e4 LT |
1120 | /* Done and happy. */ |
1121 | chip->state = FL_STATUS; | |
1122 | DISABLE_VPP(map); | |
1123 | wake_up(&chip->wq); | |
c4e77376 | 1124 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1125 | return 0; |
1126 | } | |
69423d99 | 1127 | static int cfi_staa_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) |
1da177e4 LT |
1128 | { |
1129 | struct map_info *map = mtd->priv; | |
1130 | struct cfi_private *cfi = map->fldrv_priv; | |
1131 | unsigned long adr; | |
1132 | int chipnum, ret = 0; | |
1133 | #ifdef DEBUG_LOCK_BITS | |
1134 | int ofs_factor = cfi->interleave * cfi->device_type; | |
1135 | #endif | |
1136 | ||
1137 | if (ofs & (mtd->erasesize - 1)) | |
1138 | return -EINVAL; | |
1139 | ||
1140 | if (len & (mtd->erasesize -1)) | |
1141 | return -EINVAL; | |
1142 | ||
1da177e4 LT |
1143 | chipnum = ofs >> cfi->chipshift; |
1144 | adr = ofs - (chipnum << cfi->chipshift); | |
1145 | ||
1146 | while(len) { | |
1147 | ||
1148 | #ifdef DEBUG_LOCK_BITS | |
1149 | cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL); | |
1150 | printk("before lock: block status register is %x\n",cfi_read_query(map, adr+(2*ofs_factor))); | |
1151 | cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL); | |
1152 | #endif | |
1153 | ||
1154 | ret = do_lock_oneblock(map, &cfi->chips[chipnum], adr); | |
1155 | ||
1156 | #ifdef DEBUG_LOCK_BITS | |
1157 | cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL); | |
1158 | printk("after lock: block status register is %x\n",cfi_read_query(map, adr+(2*ofs_factor))); | |
1159 | cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL); | |
1f948b43 TG |
1160 | #endif |
1161 | ||
1da177e4 LT |
1162 | if (ret) |
1163 | return ret; | |
1164 | ||
1165 | adr += mtd->erasesize; | |
1166 | len -= mtd->erasesize; | |
1167 | ||
1168 | if (adr >> cfi->chipshift) { | |
1169 | adr = 0; | |
1170 | chipnum++; | |
1f948b43 | 1171 | |
1da177e4 | 1172 | if (chipnum >= cfi->numchips) |
555b8d12 | 1173 | break; |
1da177e4 LT |
1174 | } |
1175 | } | |
1176 | return 0; | |
1177 | } | |
1178 | static inline int do_unlock_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr) | |
1179 | { | |
1180 | struct cfi_private *cfi = map->fldrv_priv; | |
1181 | map_word status, status_OK; | |
1182 | unsigned long timeo = jiffies + HZ; | |
1183 | DECLARE_WAITQUEUE(wait, current); | |
1184 | ||
1185 | adr += chip->start; | |
1186 | ||
1187 | /* Let's determine this according to the interleave only once */ | |
1188 | status_OK = CMD(0x80); | |
1189 | ||
1190 | timeo = jiffies + HZ; | |
1191 | retry: | |
c4e77376 | 1192 | mutex_lock(&chip->mutex); |
1da177e4 LT |
1193 | |
1194 | /* Check that the chip's ready to talk to us. */ | |
1195 | switch (chip->state) { | |
1196 | case FL_CFI_QUERY: | |
1197 | case FL_JEDEC_QUERY: | |
1198 | case FL_READY: | |
1199 | map_write(map, CMD(0x70), adr); | |
1200 | chip->state = FL_STATUS; | |
1201 | ||
1202 | case FL_STATUS: | |
1203 | status = map_read(map, adr); | |
1204 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
1205 | break; | |
1f948b43 | 1206 | |
1da177e4 LT |
1207 | /* Urgh. Chip not yet ready to talk to us. */ |
1208 | if (time_after(jiffies, timeo)) { | |
c4e77376 | 1209 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1210 | printk(KERN_ERR "waiting for chip to be ready timed out in unlock\n"); |
1211 | return -EIO; | |
1212 | } | |
1213 | ||
1214 | /* Latency issues. Drop the lock, wait a while and retry */ | |
c4e77376 | 1215 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1216 | cfi_udelay(1); |
1217 | goto retry; | |
1218 | ||
1219 | default: | |
1220 | /* Stick ourselves on a wait queue to be woken when | |
1221 | someone changes the status */ | |
1222 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1223 | add_wait_queue(&chip->wq, &wait); | |
c4e77376 | 1224 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1225 | schedule(); |
1226 | remove_wait_queue(&chip->wq, &wait); | |
1227 | timeo = jiffies + HZ; | |
1228 | goto retry; | |
1229 | } | |
1230 | ||
1231 | ENABLE_VPP(map); | |
1232 | map_write(map, CMD(0x60), adr); | |
1233 | map_write(map, CMD(0xD0), adr); | |
1234 | chip->state = FL_UNLOCKING; | |
1f948b43 | 1235 | |
c4e77376 | 1236 | mutex_unlock(&chip->mutex); |
1da177e4 | 1237 | msleep(1000); |
c4e77376 | 1238 | mutex_lock(&chip->mutex); |
1da177e4 LT |
1239 | |
1240 | /* FIXME. Use a timer to check this, and return immediately. */ | |
1241 | /* Once the state machine's known to be working I'll do that */ | |
1242 | ||
1243 | timeo = jiffies + (HZ*2); | |
1244 | for (;;) { | |
1245 | ||
1246 | status = map_read(map, adr); | |
1247 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
1248 | break; | |
1f948b43 | 1249 | |
1da177e4 LT |
1250 | /* OK Still waiting */ |
1251 | if (time_after(jiffies, timeo)) { | |
1252 | map_write(map, CMD(0x70), adr); | |
1253 | chip->state = FL_STATUS; | |
1254 | printk(KERN_ERR "waiting for unlock to complete timed out. Xstatus = %lx, status = %lx.\n", status.x[0], map_read(map, adr).x[0]); | |
1255 | DISABLE_VPP(map); | |
c4e77376 | 1256 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1257 | return -EIO; |
1258 | } | |
1f948b43 | 1259 | |
1da177e4 | 1260 | /* Latency issues. Drop the unlock, wait a while and retry */ |
c4e77376 | 1261 | mutex_unlock(&chip->mutex); |
1da177e4 | 1262 | cfi_udelay(1); |
c4e77376 | 1263 | mutex_lock(&chip->mutex); |
1da177e4 | 1264 | } |
1f948b43 | 1265 | |
1da177e4 LT |
1266 | /* Done and happy. */ |
1267 | chip->state = FL_STATUS; | |
1268 | DISABLE_VPP(map); | |
1269 | wake_up(&chip->wq); | |
c4e77376 | 1270 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1271 | return 0; |
1272 | } | |
69423d99 | 1273 | static int cfi_staa_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) |
1da177e4 LT |
1274 | { |
1275 | struct map_info *map = mtd->priv; | |
1276 | struct cfi_private *cfi = map->fldrv_priv; | |
1277 | unsigned long adr; | |
1278 | int chipnum, ret = 0; | |
1279 | #ifdef DEBUG_LOCK_BITS | |
1280 | int ofs_factor = cfi->interleave * cfi->device_type; | |
1281 | #endif | |
1282 | ||
1283 | chipnum = ofs >> cfi->chipshift; | |
1284 | adr = ofs - (chipnum << cfi->chipshift); | |
1285 | ||
1286 | #ifdef DEBUG_LOCK_BITS | |
1287 | { | |
1288 | unsigned long temp_adr = adr; | |
1289 | unsigned long temp_len = len; | |
1f948b43 | 1290 | |
1da177e4 LT |
1291 | cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL); |
1292 | while (temp_len) { | |
1293 | printk("before unlock %x: block status register is %x\n",temp_adr,cfi_read_query(map, temp_adr+(2*ofs_factor))); | |
1294 | temp_adr += mtd->erasesize; | |
1295 | temp_len -= mtd->erasesize; | |
1296 | } | |
1297 | cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL); | |
1298 | } | |
1299 | #endif | |
1300 | ||
1301 | ret = do_unlock_oneblock(map, &cfi->chips[chipnum], adr); | |
1302 | ||
1303 | #ifdef DEBUG_LOCK_BITS | |
1304 | cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL); | |
1305 | printk("after unlock: block status register is %x\n",cfi_read_query(map, adr+(2*ofs_factor))); | |
1306 | cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL); | |
1307 | #endif | |
1f948b43 | 1308 | |
1da177e4 LT |
1309 | return ret; |
1310 | } | |
1311 | ||
1312 | static int cfi_staa_suspend(struct mtd_info *mtd) | |
1313 | { | |
1314 | struct map_info *map = mtd->priv; | |
1315 | struct cfi_private *cfi = map->fldrv_priv; | |
1316 | int i; | |
1317 | struct flchip *chip; | |
1318 | int ret = 0; | |
1319 | ||
1320 | for (i=0; !ret && i<cfi->numchips; i++) { | |
1321 | chip = &cfi->chips[i]; | |
1322 | ||
c4e77376 | 1323 | mutex_lock(&chip->mutex); |
1da177e4 LT |
1324 | |
1325 | switch(chip->state) { | |
1326 | case FL_READY: | |
1327 | case FL_STATUS: | |
1328 | case FL_CFI_QUERY: | |
1329 | case FL_JEDEC_QUERY: | |
1330 | chip->oldstate = chip->state; | |
1331 | chip->state = FL_PM_SUSPENDED; | |
1f948b43 | 1332 | /* No need to wake_up() on this state change - |
1da177e4 LT |
1333 | * as the whole point is that nobody can do anything |
1334 | * with the chip now anyway. | |
1335 | */ | |
1336 | case FL_PM_SUSPENDED: | |
1337 | break; | |
1338 | ||
1339 | default: | |
1340 | ret = -EAGAIN; | |
1341 | break; | |
1342 | } | |
c4e77376 | 1343 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1344 | } |
1345 | ||
1346 | /* Unlock the chips again */ | |
1347 | ||
1348 | if (ret) { | |
1349 | for (i--; i >=0; i--) { | |
1350 | chip = &cfi->chips[i]; | |
1f948b43 | 1351 | |
c4e77376 | 1352 | mutex_lock(&chip->mutex); |
1f948b43 | 1353 | |
1da177e4 LT |
1354 | if (chip->state == FL_PM_SUSPENDED) { |
1355 | /* No need to force it into a known state here, | |
1356 | because we're returning failure, and it didn't | |
1357 | get power cycled */ | |
1358 | chip->state = chip->oldstate; | |
1359 | wake_up(&chip->wq); | |
1360 | } | |
c4e77376 | 1361 | mutex_unlock(&chip->mutex); |
1da177e4 | 1362 | } |
1f948b43 TG |
1363 | } |
1364 | ||
1da177e4 LT |
1365 | return ret; |
1366 | } | |
1367 | ||
1368 | static void cfi_staa_resume(struct mtd_info *mtd) | |
1369 | { | |
1370 | struct map_info *map = mtd->priv; | |
1371 | struct cfi_private *cfi = map->fldrv_priv; | |
1372 | int i; | |
1373 | struct flchip *chip; | |
1374 | ||
1375 | for (i=0; i<cfi->numchips; i++) { | |
1f948b43 | 1376 | |
1da177e4 LT |
1377 | chip = &cfi->chips[i]; |
1378 | ||
c4e77376 | 1379 | mutex_lock(&chip->mutex); |
1f948b43 | 1380 | |
1da177e4 LT |
1381 | /* Go to known state. Chip may have been power cycled */ |
1382 | if (chip->state == FL_PM_SUSPENDED) { | |
1383 | map_write(map, CMD(0xFF), 0); | |
1384 | chip->state = FL_READY; | |
1385 | wake_up(&chip->wq); | |
1386 | } | |
1387 | ||
c4e77376 | 1388 | mutex_unlock(&chip->mutex); |
1da177e4 LT |
1389 | } |
1390 | } | |
1391 | ||
1392 | static void cfi_staa_destroy(struct mtd_info *mtd) | |
1393 | { | |
1394 | struct map_info *map = mtd->priv; | |
1395 | struct cfi_private *cfi = map->fldrv_priv; | |
1396 | kfree(cfi->cmdset_priv); | |
1397 | kfree(cfi); | |
1398 | } | |
1399 | ||
1da177e4 | 1400 | MODULE_LICENSE("GPL"); |