Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Common Flash Interface support: | |
3 | * Intel Extended Vendor Command Set (ID 0x0001) | |
4 | * | |
5 | * (C) 2000 Red Hat. GPL'd | |
6 | * | |
8bc3b380 | 7 | * $Id: cfi_cmdset_0001.c,v 1.186 2005/11/23 22:07:52 nico Exp $ |
1f948b43 | 8 | * |
1da177e4 | 9 | * |
1da177e4 LT |
10 | * 10/10/2000 Nicolas Pitre <nico@cam.org> |
11 | * - completely revamped method functions so they are aware and | |
12 | * independent of the flash geometry (buswidth, interleave, etc.) | |
13 | * - scalability vs code size is completely set at compile-time | |
14 | * (see include/linux/mtd/cfi.h for selection) | |
15 | * - optimized write buffer method | |
16 | * 02/05/2002 Christopher Hoover <ch@hpl.hp.com>/<ch@murgatroid.com> | |
17 | * - reworked lock/unlock/erase support for var size flash | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
21 | #include <linux/types.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/sched.h> | |
24 | #include <linux/init.h> | |
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> | |
963a6fb0 | 32 | #include <linux/reboot.h> |
1da177e4 LT |
33 | #include <linux/mtd/xip.h> |
34 | #include <linux/mtd/map.h> | |
35 | #include <linux/mtd/mtd.h> | |
36 | #include <linux/mtd/compatmac.h> | |
37 | #include <linux/mtd/cfi.h> | |
38 | ||
39 | /* #define CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE */ | |
40 | /* #define CMDSET0001_DISABLE_WRITE_SUSPEND */ | |
41 | ||
42 | // debugging, turns off buffer write mode if set to 1 | |
43 | #define FORCE_WORD_WRITE 0 | |
44 | ||
45 | #define MANUFACTURER_INTEL 0x0089 | |
46 | #define I82802AB 0x00ad | |
47 | #define I82802AC 0x00ac | |
48 | #define MANUFACTURER_ST 0x0020 | |
49 | #define M50LPW080 0x002F | |
50 | ||
51 | static int cfi_intelext_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); | |
1da177e4 LT |
52 | static int cfi_intelext_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); |
53 | static int cfi_intelext_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); | |
e102d54a | 54 | static int cfi_intelext_writev(struct mtd_info *, const struct kvec *, unsigned long, loff_t, size_t *); |
1da177e4 LT |
55 | static int cfi_intelext_erase_varsize(struct mtd_info *, struct erase_info *); |
56 | static void cfi_intelext_sync (struct mtd_info *); | |
57 | static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, size_t len); | |
58 | static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, size_t len); | |
8048d2fc | 59 | #ifdef CONFIG_MTD_OTP |
f77814dd NP |
60 | static int cfi_intelext_read_fact_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *); |
61 | static int cfi_intelext_read_user_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *); | |
62 | static int cfi_intelext_write_user_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *); | |
63 | static int cfi_intelext_lock_user_prot_reg (struct mtd_info *, loff_t, size_t); | |
64 | static int cfi_intelext_get_fact_prot_info (struct mtd_info *, | |
65 | struct otp_info *, size_t); | |
66 | static int cfi_intelext_get_user_prot_info (struct mtd_info *, | |
67 | struct otp_info *, size_t); | |
8048d2fc | 68 | #endif |
1da177e4 LT |
69 | static int cfi_intelext_suspend (struct mtd_info *); |
70 | static void cfi_intelext_resume (struct mtd_info *); | |
963a6fb0 | 71 | static int cfi_intelext_reboot (struct notifier_block *, unsigned long, void *); |
1da177e4 LT |
72 | |
73 | static void cfi_intelext_destroy(struct mtd_info *); | |
74 | ||
75 | struct mtd_info *cfi_cmdset_0001(struct map_info *, int); | |
76 | ||
77 | static struct mtd_info *cfi_intelext_setup (struct mtd_info *); | |
78 | static int cfi_intelext_partition_fixup(struct mtd_info *, struct cfi_private **); | |
79 | ||
80 | static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, | |
81 | size_t *retlen, u_char **mtdbuf); | |
82 | static void cfi_intelext_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, | |
83 | size_t len); | |
84 | ||
85 | static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode); | |
86 | static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr); | |
87 | #include "fwh_lock.h" | |
88 | ||
89 | ||
90 | ||
91 | /* | |
92 | * *********** SETUP AND PROBE BITS *********** | |
93 | */ | |
94 | ||
95 | static struct mtd_chip_driver cfi_intelext_chipdrv = { | |
96 | .probe = NULL, /* Not usable directly */ | |
97 | .destroy = cfi_intelext_destroy, | |
98 | .name = "cfi_cmdset_0001", | |
99 | .module = THIS_MODULE | |
100 | }; | |
101 | ||
102 | /* #define DEBUG_LOCK_BITS */ | |
103 | /* #define DEBUG_CFI_FEATURES */ | |
104 | ||
105 | #ifdef DEBUG_CFI_FEATURES | |
106 | static void cfi_tell_features(struct cfi_pri_intelext *extp) | |
107 | { | |
108 | int i; | |
638d9838 | 109 | printk(" Extended Query version %c.%c\n", extp->MajorVersion, extp->MinorVersion); |
1da177e4 LT |
110 | printk(" Feature/Command Support: %4.4X\n", extp->FeatureSupport); |
111 | printk(" - Chip Erase: %s\n", extp->FeatureSupport&1?"supported":"unsupported"); | |
112 | printk(" - Suspend Erase: %s\n", extp->FeatureSupport&2?"supported":"unsupported"); | |
113 | printk(" - Suspend Program: %s\n", extp->FeatureSupport&4?"supported":"unsupported"); | |
114 | printk(" - Legacy Lock/Unlock: %s\n", extp->FeatureSupport&8?"supported":"unsupported"); | |
115 | printk(" - Queued Erase: %s\n", extp->FeatureSupport&16?"supported":"unsupported"); | |
116 | printk(" - Instant block lock: %s\n", extp->FeatureSupport&32?"supported":"unsupported"); | |
117 | printk(" - Protection Bits: %s\n", extp->FeatureSupport&64?"supported":"unsupported"); | |
118 | printk(" - Page-mode read: %s\n", extp->FeatureSupport&128?"supported":"unsupported"); | |
119 | printk(" - Synchronous read: %s\n", extp->FeatureSupport&256?"supported":"unsupported"); | |
120 | printk(" - Simultaneous operations: %s\n", extp->FeatureSupport&512?"supported":"unsupported"); | |
638d9838 NP |
121 | printk(" - Extended Flash Array: %s\n", extp->FeatureSupport&1024?"supported":"unsupported"); |
122 | for (i=11; i<32; i++) { | |
1f948b43 | 123 | if (extp->FeatureSupport & (1<<i)) |
1da177e4 LT |
124 | printk(" - Unknown Bit %X: supported\n", i); |
125 | } | |
1f948b43 | 126 | |
1da177e4 LT |
127 | printk(" Supported functions after Suspend: %2.2X\n", extp->SuspendCmdSupport); |
128 | printk(" - Program after Erase Suspend: %s\n", extp->SuspendCmdSupport&1?"supported":"unsupported"); | |
129 | for (i=1; i<8; i++) { | |
130 | if (extp->SuspendCmdSupport & (1<<i)) | |
131 | printk(" - Unknown Bit %X: supported\n", i); | |
132 | } | |
1f948b43 | 133 | |
1da177e4 LT |
134 | printk(" Block Status Register Mask: %4.4X\n", extp->BlkStatusRegMask); |
135 | printk(" - Lock Bit Active: %s\n", extp->BlkStatusRegMask&1?"yes":"no"); | |
638d9838 NP |
136 | printk(" - Lock-Down Bit Active: %s\n", extp->BlkStatusRegMask&2?"yes":"no"); |
137 | for (i=2; i<3; i++) { | |
1da177e4 LT |
138 | if (extp->BlkStatusRegMask & (1<<i)) |
139 | printk(" - Unknown Bit %X Active: yes\n",i); | |
140 | } | |
638d9838 NP |
141 | printk(" - EFA Lock Bit: %s\n", extp->BlkStatusRegMask&16?"yes":"no"); |
142 | printk(" - EFA Lock-Down Bit: %s\n", extp->BlkStatusRegMask&32?"yes":"no"); | |
143 | for (i=6; i<16; i++) { | |
144 | if (extp->BlkStatusRegMask & (1<<i)) | |
145 | printk(" - Unknown Bit %X Active: yes\n",i); | |
146 | } | |
147 | ||
1f948b43 | 148 | printk(" Vcc Logic Supply Optimum Program/Erase Voltage: %d.%d V\n", |
1da177e4 LT |
149 | extp->VccOptimal >> 4, extp->VccOptimal & 0xf); |
150 | if (extp->VppOptimal) | |
1f948b43 | 151 | printk(" Vpp Programming Supply Optimum Program/Erase Voltage: %d.%d V\n", |
1da177e4 LT |
152 | extp->VppOptimal >> 4, extp->VppOptimal & 0xf); |
153 | } | |
154 | #endif | |
155 | ||
156 | #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE | |
1f948b43 | 157 | /* Some Intel Strata Flash prior to FPO revision C has bugs in this area */ |
1da177e4 LT |
158 | static void fixup_intel_strataflash(struct mtd_info *mtd, void* param) |
159 | { | |
160 | struct map_info *map = mtd->priv; | |
161 | struct cfi_private *cfi = map->fldrv_priv; | |
162 | struct cfi_pri_amdstd *extp = cfi->cmdset_priv; | |
163 | ||
164 | printk(KERN_WARNING "cfi_cmdset_0001: Suspend " | |
165 | "erase on write disabled.\n"); | |
166 | extp->SuspendCmdSupport &= ~1; | |
167 | } | |
168 | #endif | |
169 | ||
170 | #ifdef CMDSET0001_DISABLE_WRITE_SUSPEND | |
171 | static void fixup_no_write_suspend(struct mtd_info *mtd, void* param) | |
172 | { | |
173 | struct map_info *map = mtd->priv; | |
174 | struct cfi_private *cfi = map->fldrv_priv; | |
175 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; | |
176 | ||
177 | if (cfip && (cfip->FeatureSupport&4)) { | |
178 | cfip->FeatureSupport &= ~4; | |
179 | printk(KERN_WARNING "cfi_cmdset_0001: write suspend disabled\n"); | |
180 | } | |
181 | } | |
182 | #endif | |
183 | ||
184 | static void fixup_st_m28w320ct(struct mtd_info *mtd, void* param) | |
185 | { | |
186 | struct map_info *map = mtd->priv; | |
187 | struct cfi_private *cfi = map->fldrv_priv; | |
1f948b43 | 188 | |
1da177e4 LT |
189 | cfi->cfiq->BufWriteTimeoutTyp = 0; /* Not supported */ |
190 | cfi->cfiq->BufWriteTimeoutMax = 0; /* Not supported */ | |
191 | } | |
192 | ||
193 | static void fixup_st_m28w320cb(struct mtd_info *mtd, void* param) | |
194 | { | |
195 | struct map_info *map = mtd->priv; | |
196 | struct cfi_private *cfi = map->fldrv_priv; | |
1f948b43 | 197 | |
1da177e4 LT |
198 | /* Note this is done after the region info is endian swapped */ |
199 | cfi->cfiq->EraseRegionInfo[1] = | |
200 | (cfi->cfiq->EraseRegionInfo[1] & 0xffff0000) | 0x3e; | |
201 | }; | |
202 | ||
203 | static void fixup_use_point(struct mtd_info *mtd, void *param) | |
204 | { | |
205 | struct map_info *map = mtd->priv; | |
206 | if (!mtd->point && map_is_linear(map)) { | |
207 | mtd->point = cfi_intelext_point; | |
208 | mtd->unpoint = cfi_intelext_unpoint; | |
209 | } | |
210 | } | |
211 | ||
212 | static void fixup_use_write_buffers(struct mtd_info *mtd, void *param) | |
213 | { | |
214 | struct map_info *map = mtd->priv; | |
215 | struct cfi_private *cfi = map->fldrv_priv; | |
216 | if (cfi->cfiq->BufWriteTimeoutTyp) { | |
217 | printk(KERN_INFO "Using buffer write method\n" ); | |
218 | mtd->write = cfi_intelext_write_buffers; | |
e102d54a | 219 | mtd->writev = cfi_intelext_writev; |
1da177e4 LT |
220 | } |
221 | } | |
222 | ||
223 | static struct cfi_fixup cfi_fixup_table[] = { | |
224 | #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE | |
1f948b43 | 225 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_intel_strataflash, NULL }, |
1da177e4 LT |
226 | #endif |
227 | #ifdef CMDSET0001_DISABLE_WRITE_SUSPEND | |
228 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_no_write_suspend, NULL }, | |
229 | #endif | |
230 | #if !FORCE_WORD_WRITE | |
231 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL }, | |
232 | #endif | |
233 | { CFI_MFR_ST, 0x00ba, /* M28W320CT */ fixup_st_m28w320ct, NULL }, | |
234 | { CFI_MFR_ST, 0x00bb, /* M28W320CB */ fixup_st_m28w320cb, NULL }, | |
235 | { 0, 0, NULL, NULL } | |
236 | }; | |
237 | ||
238 | static struct cfi_fixup jedec_fixup_table[] = { | |
239 | { MANUFACTURER_INTEL, I82802AB, fixup_use_fwh_lock, NULL, }, | |
240 | { MANUFACTURER_INTEL, I82802AC, fixup_use_fwh_lock, NULL, }, | |
241 | { MANUFACTURER_ST, M50LPW080, fixup_use_fwh_lock, NULL, }, | |
242 | { 0, 0, NULL, NULL } | |
243 | }; | |
244 | static struct cfi_fixup fixup_table[] = { | |
245 | /* The CFI vendor ids and the JEDEC vendor IDs appear | |
246 | * to be common. It is like the devices id's are as | |
247 | * well. This table is to pick all cases where | |
248 | * we know that is the case. | |
249 | */ | |
250 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_point, NULL }, | |
251 | { 0, 0, NULL, NULL } | |
252 | }; | |
253 | ||
254 | static inline struct cfi_pri_intelext * | |
255 | read_pri_intelext(struct map_info *map, __u16 adr) | |
256 | { | |
257 | struct cfi_pri_intelext *extp; | |
258 | unsigned int extp_size = sizeof(*extp); | |
259 | ||
260 | again: | |
261 | extp = (struct cfi_pri_intelext *)cfi_read_pri(map, adr, extp_size, "Intel/Sharp"); | |
262 | if (!extp) | |
263 | return NULL; | |
264 | ||
d88f977b | 265 | if (extp->MajorVersion != '1' || |
638d9838 | 266 | (extp->MinorVersion < '0' || extp->MinorVersion > '4')) { |
d88f977b TP |
267 | printk(KERN_ERR " Unknown Intel/Sharp Extended Query " |
268 | "version %c.%c.\n", extp->MajorVersion, | |
269 | extp->MinorVersion); | |
270 | kfree(extp); | |
271 | return NULL; | |
272 | } | |
273 | ||
1da177e4 LT |
274 | /* Do some byteswapping if necessary */ |
275 | extp->FeatureSupport = le32_to_cpu(extp->FeatureSupport); | |
276 | extp->BlkStatusRegMask = le16_to_cpu(extp->BlkStatusRegMask); | |
277 | extp->ProtRegAddr = le16_to_cpu(extp->ProtRegAddr); | |
278 | ||
638d9838 | 279 | if (extp->MajorVersion == '1' && extp->MinorVersion >= '3') { |
1da177e4 LT |
280 | unsigned int extra_size = 0; |
281 | int nb_parts, i; | |
282 | ||
283 | /* Protection Register info */ | |
72b56a2d NP |
284 | extra_size += (extp->NumProtectionFields - 1) * |
285 | sizeof(struct cfi_intelext_otpinfo); | |
1da177e4 LT |
286 | |
287 | /* Burst Read info */ | |
6f6ed056 NP |
288 | extra_size += 2; |
289 | if (extp_size < sizeof(*extp) + extra_size) | |
290 | goto need_more; | |
291 | extra_size += extp->extra[extra_size-1]; | |
1da177e4 LT |
292 | |
293 | /* Number of hardware-partitions */ | |
294 | extra_size += 1; | |
295 | if (extp_size < sizeof(*extp) + extra_size) | |
296 | goto need_more; | |
297 | nb_parts = extp->extra[extra_size - 1]; | |
298 | ||
638d9838 NP |
299 | /* skip the sizeof(partregion) field in CFI 1.4 */ |
300 | if (extp->MinorVersion >= '4') | |
301 | extra_size += 2; | |
302 | ||
1da177e4 LT |
303 | for (i = 0; i < nb_parts; i++) { |
304 | struct cfi_intelext_regioninfo *rinfo; | |
305 | rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[extra_size]; | |
306 | extra_size += sizeof(*rinfo); | |
307 | if (extp_size < sizeof(*extp) + extra_size) | |
308 | goto need_more; | |
309 | rinfo->NumIdentPartitions=le16_to_cpu(rinfo->NumIdentPartitions); | |
310 | extra_size += (rinfo->NumBlockTypes - 1) | |
311 | * sizeof(struct cfi_intelext_blockinfo); | |
312 | } | |
313 | ||
638d9838 NP |
314 | if (extp->MinorVersion >= '4') |
315 | extra_size += sizeof(struct cfi_intelext_programming_regioninfo); | |
316 | ||
1da177e4 LT |
317 | if (extp_size < sizeof(*extp) + extra_size) { |
318 | need_more: | |
319 | extp_size = sizeof(*extp) + extra_size; | |
320 | kfree(extp); | |
321 | if (extp_size > 4096) { | |
322 | printk(KERN_ERR | |
323 | "%s: cfi_pri_intelext is too fat\n", | |
324 | __FUNCTION__); | |
325 | return NULL; | |
326 | } | |
327 | goto again; | |
328 | } | |
329 | } | |
1f948b43 | 330 | |
1da177e4 LT |
331 | return extp; |
332 | } | |
333 | ||
1da177e4 LT |
334 | struct mtd_info *cfi_cmdset_0001(struct map_info *map, int primary) |
335 | { | |
336 | struct cfi_private *cfi = map->fldrv_priv; | |
337 | struct mtd_info *mtd; | |
338 | int i; | |
339 | ||
340 | mtd = kmalloc(sizeof(*mtd), GFP_KERNEL); | |
341 | if (!mtd) { | |
342 | printk(KERN_ERR "Failed to allocate memory for MTD device\n"); | |
343 | return NULL; | |
344 | } | |
345 | memset(mtd, 0, sizeof(*mtd)); | |
346 | mtd->priv = map; | |
347 | mtd->type = MTD_NORFLASH; | |
348 | ||
349 | /* Fill in the default mtd operations */ | |
350 | mtd->erase = cfi_intelext_erase_varsize; | |
351 | mtd->read = cfi_intelext_read; | |
352 | mtd->write = cfi_intelext_write_words; | |
353 | mtd->sync = cfi_intelext_sync; | |
354 | mtd->lock = cfi_intelext_lock; | |
355 | mtd->unlock = cfi_intelext_unlock; | |
356 | mtd->suspend = cfi_intelext_suspend; | |
357 | mtd->resume = cfi_intelext_resume; | |
358 | mtd->flags = MTD_CAP_NORFLASH; | |
359 | mtd->name = map->name; | |
963a6fb0 NP |
360 | |
361 | mtd->reboot_notifier.notifier_call = cfi_intelext_reboot; | |
362 | ||
1da177e4 | 363 | if (cfi->cfi_mode == CFI_MODE_CFI) { |
1f948b43 | 364 | /* |
1da177e4 LT |
365 | * It's a real CFI chip, not one for which the probe |
366 | * routine faked a CFI structure. So we read the feature | |
367 | * table from it. | |
368 | */ | |
369 | __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR; | |
370 | struct cfi_pri_intelext *extp; | |
371 | ||
372 | extp = read_pri_intelext(map, adr); | |
373 | if (!extp) { | |
374 | kfree(mtd); | |
375 | return NULL; | |
376 | } | |
377 | ||
378 | /* Install our own private info structure */ | |
1f948b43 | 379 | cfi->cmdset_priv = extp; |
1da177e4 LT |
380 | |
381 | cfi_fixup(mtd, cfi_fixup_table); | |
382 | ||
383 | #ifdef DEBUG_CFI_FEATURES | |
384 | /* Tell the user about it in lots of lovely detail */ | |
385 | cfi_tell_features(extp); | |
1f948b43 | 386 | #endif |
1da177e4 LT |
387 | |
388 | if(extp->SuspendCmdSupport & 1) { | |
389 | printk(KERN_NOTICE "cfi_cmdset_0001: Erase suspend on write enabled\n"); | |
390 | } | |
391 | } | |
392 | else if (cfi->cfi_mode == CFI_MODE_JEDEC) { | |
393 | /* Apply jedec specific fixups */ | |
394 | cfi_fixup(mtd, jedec_fixup_table); | |
395 | } | |
396 | /* Apply generic fixups */ | |
397 | cfi_fixup(mtd, fixup_table); | |
398 | ||
399 | for (i=0; i< cfi->numchips; i++) { | |
400 | cfi->chips[i].word_write_time = 1<<cfi->cfiq->WordWriteTimeoutTyp; | |
401 | cfi->chips[i].buffer_write_time = 1<<cfi->cfiq->BufWriteTimeoutTyp; | |
c172471b | 402 | cfi->chips[i].erase_time = 1000<<cfi->cfiq->BlockEraseTimeoutTyp; |
1da177e4 | 403 | cfi->chips[i].ref_point_counter = 0; |
c314b6f1 | 404 | init_waitqueue_head(&(cfi->chips[i].wq)); |
1f948b43 | 405 | } |
1da177e4 LT |
406 | |
407 | map->fldrv = &cfi_intelext_chipdrv; | |
1f948b43 | 408 | |
1da177e4 LT |
409 | return cfi_intelext_setup(mtd); |
410 | } | |
a15bdeef DW |
411 | struct mtd_info *cfi_cmdset_0003(struct map_info *map, int primary) __attribute__((alias("cfi_cmdset_0001"))); |
412 | struct mtd_info *cfi_cmdset_0200(struct map_info *map, int primary) __attribute__((alias("cfi_cmdset_0001"))); | |
413 | EXPORT_SYMBOL_GPL(cfi_cmdset_0001); | |
414 | EXPORT_SYMBOL_GPL(cfi_cmdset_0003); | |
415 | EXPORT_SYMBOL_GPL(cfi_cmdset_0200); | |
1da177e4 LT |
416 | |
417 | static struct mtd_info *cfi_intelext_setup(struct mtd_info *mtd) | |
418 | { | |
419 | struct map_info *map = mtd->priv; | |
420 | struct cfi_private *cfi = map->fldrv_priv; | |
421 | unsigned long offset = 0; | |
422 | int i,j; | |
423 | unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave; | |
424 | ||
425 | //printk(KERN_DEBUG "number of CFI chips: %d\n", cfi->numchips); | |
426 | ||
427 | mtd->size = devsize * cfi->numchips; | |
428 | ||
429 | mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips; | |
1f948b43 | 430 | mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) |
1da177e4 | 431 | * mtd->numeraseregions, GFP_KERNEL); |
1f948b43 | 432 | if (!mtd->eraseregions) { |
1da177e4 LT |
433 | printk(KERN_ERR "Failed to allocate memory for MTD erase region info\n"); |
434 | goto setup_err; | |
435 | } | |
1f948b43 | 436 | |
1da177e4 LT |
437 | for (i=0; i<cfi->cfiq->NumEraseRegions; i++) { |
438 | unsigned long ernum, ersize; | |
439 | ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave; | |
440 | ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1; | |
441 | ||
442 | if (mtd->erasesize < ersize) { | |
443 | mtd->erasesize = ersize; | |
444 | } | |
445 | for (j=0; j<cfi->numchips; j++) { | |
446 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset; | |
447 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize; | |
448 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum; | |
449 | } | |
450 | offset += (ersize * ernum); | |
451 | } | |
452 | ||
453 | if (offset != devsize) { | |
454 | /* Argh */ | |
455 | printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize); | |
456 | goto setup_err; | |
457 | } | |
458 | ||
459 | for (i=0; i<mtd->numeraseregions;i++){ | |
4843653c | 460 | printk(KERN_DEBUG "erase region %d: offset=0x%x,size=0x%x,blocks=%d\n", |
1da177e4 LT |
461 | i,mtd->eraseregions[i].offset, |
462 | mtd->eraseregions[i].erasesize, | |
463 | mtd->eraseregions[i].numblocks); | |
464 | } | |
465 | ||
f77814dd | 466 | #ifdef CONFIG_MTD_OTP |
1da177e4 | 467 | mtd->read_fact_prot_reg = cfi_intelext_read_fact_prot_reg; |
f77814dd NP |
468 | mtd->read_user_prot_reg = cfi_intelext_read_user_prot_reg; |
469 | mtd->write_user_prot_reg = cfi_intelext_write_user_prot_reg; | |
470 | mtd->lock_user_prot_reg = cfi_intelext_lock_user_prot_reg; | |
471 | mtd->get_fact_prot_info = cfi_intelext_get_fact_prot_info; | |
472 | mtd->get_user_prot_info = cfi_intelext_get_user_prot_info; | |
1da177e4 LT |
473 | #endif |
474 | ||
475 | /* This function has the potential to distort the reality | |
476 | a bit and therefore should be called last. */ | |
477 | if (cfi_intelext_partition_fixup(mtd, &cfi) != 0) | |
478 | goto setup_err; | |
479 | ||
480 | __module_get(THIS_MODULE); | |
963a6fb0 | 481 | register_reboot_notifier(&mtd->reboot_notifier); |
1da177e4 LT |
482 | return mtd; |
483 | ||
484 | setup_err: | |
485 | if(mtd) { | |
fa671646 | 486 | kfree(mtd->eraseregions); |
1da177e4 LT |
487 | kfree(mtd); |
488 | } | |
489 | kfree(cfi->cmdset_priv); | |
490 | return NULL; | |
491 | } | |
492 | ||
493 | static int cfi_intelext_partition_fixup(struct mtd_info *mtd, | |
494 | struct cfi_private **pcfi) | |
495 | { | |
496 | struct map_info *map = mtd->priv; | |
497 | struct cfi_private *cfi = *pcfi; | |
498 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; | |
499 | ||
500 | /* | |
501 | * Probing of multi-partition flash ships. | |
502 | * | |
503 | * To support multiple partitions when available, we simply arrange | |
504 | * for each of them to have their own flchip structure even if they | |
505 | * are on the same physical chip. This means completely recreating | |
506 | * a new cfi_private structure right here which is a blatent code | |
507 | * layering violation, but this is still the least intrusive | |
508 | * arrangement at this point. This can be rearranged in the future | |
509 | * if someone feels motivated enough. --nico | |
510 | */ | |
638d9838 | 511 | if (extp && extp->MajorVersion == '1' && extp->MinorVersion >= '3' |
1da177e4 LT |
512 | && extp->FeatureSupport & (1 << 9)) { |
513 | struct cfi_private *newcfi; | |
514 | struct flchip *chip; | |
515 | struct flchip_shared *shared; | |
516 | int offs, numregions, numparts, partshift, numvirtchips, i, j; | |
517 | ||
518 | /* Protection Register info */ | |
72b56a2d NP |
519 | offs = (extp->NumProtectionFields - 1) * |
520 | sizeof(struct cfi_intelext_otpinfo); | |
1da177e4 LT |
521 | |
522 | /* Burst Read info */ | |
6f6ed056 | 523 | offs += extp->extra[offs+1]+2; |
1da177e4 LT |
524 | |
525 | /* Number of partition regions */ | |
526 | numregions = extp->extra[offs]; | |
527 | offs += 1; | |
528 | ||
638d9838 NP |
529 | /* skip the sizeof(partregion) field in CFI 1.4 */ |
530 | if (extp->MinorVersion >= '4') | |
531 | offs += 2; | |
532 | ||
1da177e4 LT |
533 | /* Number of hardware partitions */ |
534 | numparts = 0; | |
535 | for (i = 0; i < numregions; i++) { | |
536 | struct cfi_intelext_regioninfo *rinfo; | |
537 | rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[offs]; | |
538 | numparts += rinfo->NumIdentPartitions; | |
539 | offs += sizeof(*rinfo) | |
540 | + (rinfo->NumBlockTypes - 1) * | |
541 | sizeof(struct cfi_intelext_blockinfo); | |
542 | } | |
543 | ||
638d9838 NP |
544 | /* Programming Region info */ |
545 | if (extp->MinorVersion >= '4') { | |
546 | struct cfi_intelext_programming_regioninfo *prinfo; | |
547 | prinfo = (struct cfi_intelext_programming_regioninfo *)&extp->extra[offs]; | |
548 | MTD_PROGREGION_SIZE(mtd) = cfi->interleave << prinfo->ProgRegShift; | |
549 | MTD_PROGREGION_CTRLMODE_VALID(mtd) = cfi->interleave * prinfo->ControlValid; | |
550 | MTD_PROGREGION_CTRLMODE_INVALID(mtd) = cfi->interleave * prinfo->ControlInvalid; | |
551 | mtd->flags |= MTD_PROGRAM_REGIONS; | |
552 | printk(KERN_DEBUG "%s: program region size/ctrl_valid/ctrl_inval = %d/%d/%d\n", | |
553 | map->name, MTD_PROGREGION_SIZE(mtd), | |
554 | MTD_PROGREGION_CTRLMODE_VALID(mtd), | |
555 | MTD_PROGREGION_CTRLMODE_INVALID(mtd)); | |
556 | } | |
557 | ||
1da177e4 LT |
558 | /* |
559 | * All functions below currently rely on all chips having | |
560 | * the same geometry so we'll just assume that all hardware | |
561 | * partitions are of the same size too. | |
562 | */ | |
563 | partshift = cfi->chipshift - __ffs(numparts); | |
564 | ||
565 | if ((1 << partshift) < mtd->erasesize) { | |
566 | printk( KERN_ERR | |
567 | "%s: bad number of hw partitions (%d)\n", | |
568 | __FUNCTION__, numparts); | |
569 | return -EINVAL; | |
570 | } | |
571 | ||
572 | numvirtchips = cfi->numchips * numparts; | |
573 | newcfi = kmalloc(sizeof(struct cfi_private) + numvirtchips * sizeof(struct flchip), GFP_KERNEL); | |
574 | if (!newcfi) | |
575 | return -ENOMEM; | |
576 | shared = kmalloc(sizeof(struct flchip_shared) * cfi->numchips, GFP_KERNEL); | |
577 | if (!shared) { | |
578 | kfree(newcfi); | |
579 | return -ENOMEM; | |
580 | } | |
581 | memcpy(newcfi, cfi, sizeof(struct cfi_private)); | |
582 | newcfi->numchips = numvirtchips; | |
583 | newcfi->chipshift = partshift; | |
584 | ||
585 | chip = &newcfi->chips[0]; | |
586 | for (i = 0; i < cfi->numchips; i++) { | |
587 | shared[i].writing = shared[i].erasing = NULL; | |
588 | spin_lock_init(&shared[i].lock); | |
589 | for (j = 0; j < numparts; j++) { | |
590 | *chip = cfi->chips[i]; | |
591 | chip->start += j << partshift; | |
592 | chip->priv = &shared[i]; | |
593 | /* those should be reset too since | |
594 | they create memory references. */ | |
595 | init_waitqueue_head(&chip->wq); | |
596 | spin_lock_init(&chip->_spinlock); | |
597 | chip->mutex = &chip->_spinlock; | |
598 | chip++; | |
599 | } | |
600 | } | |
601 | ||
602 | printk(KERN_DEBUG "%s: %d set(s) of %d interleaved chips " | |
603 | "--> %d partitions of %d KiB\n", | |
604 | map->name, cfi->numchips, cfi->interleave, | |
605 | newcfi->numchips, 1<<(newcfi->chipshift-10)); | |
606 | ||
607 | map->fldrv_priv = newcfi; | |
608 | *pcfi = newcfi; | |
609 | kfree(cfi); | |
610 | } | |
611 | ||
612 | return 0; | |
613 | } | |
614 | ||
615 | /* | |
616 | * *********** CHIP ACCESS FUNCTIONS *********** | |
617 | */ | |
618 | ||
619 | static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode) | |
620 | { | |
621 | DECLARE_WAITQUEUE(wait, current); | |
622 | struct cfi_private *cfi = map->fldrv_priv; | |
623 | map_word status, status_OK = CMD(0x80), status_PWS = CMD(0x01); | |
624 | unsigned long timeo; | |
625 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; | |
626 | ||
627 | resettime: | |
628 | timeo = jiffies + HZ; | |
629 | retry: | |
f77814dd | 630 | if (chip->priv && (mode == FL_WRITING || mode == FL_ERASING || mode == FL_OTP_WRITE)) { |
1da177e4 LT |
631 | /* |
632 | * OK. We have possibility for contension on the write/erase | |
633 | * operations which are global to the real chip and not per | |
634 | * partition. So let's fight it over in the partition which | |
635 | * currently has authority on the operation. | |
636 | * | |
637 | * The rules are as follows: | |
638 | * | |
639 | * - any write operation must own shared->writing. | |
640 | * | |
641 | * - any erase operation must own _both_ shared->writing and | |
642 | * shared->erasing. | |
643 | * | |
644 | * - contension arbitration is handled in the owner's context. | |
645 | * | |
8bc3b380 NP |
646 | * The 'shared' struct can be read and/or written only when |
647 | * its lock is taken. | |
1da177e4 LT |
648 | */ |
649 | struct flchip_shared *shared = chip->priv; | |
650 | struct flchip *contender; | |
651 | spin_lock(&shared->lock); | |
652 | contender = shared->writing; | |
653 | if (contender && contender != chip) { | |
654 | /* | |
655 | * The engine to perform desired operation on this | |
656 | * partition is already in use by someone else. | |
657 | * Let's fight over it in the context of the chip | |
658 | * currently using it. If it is possible to suspend, | |
659 | * that other partition will do just that, otherwise | |
660 | * it'll happily send us to sleep. In any case, when | |
661 | * get_chip returns success we're clear to go ahead. | |
662 | */ | |
663 | int ret = spin_trylock(contender->mutex); | |
664 | spin_unlock(&shared->lock); | |
665 | if (!ret) | |
666 | goto retry; | |
667 | spin_unlock(chip->mutex); | |
668 | ret = get_chip(map, contender, contender->start, mode); | |
669 | spin_lock(chip->mutex); | |
670 | if (ret) { | |
671 | spin_unlock(contender->mutex); | |
672 | return ret; | |
673 | } | |
674 | timeo = jiffies + HZ; | |
675 | spin_lock(&shared->lock); | |
8bc3b380 | 676 | spin_unlock(contender->mutex); |
1da177e4 LT |
677 | } |
678 | ||
679 | /* We now own it */ | |
680 | shared->writing = chip; | |
681 | if (mode == FL_ERASING) | |
682 | shared->erasing = chip; | |
1da177e4 LT |
683 | spin_unlock(&shared->lock); |
684 | } | |
685 | ||
686 | switch (chip->state) { | |
687 | ||
688 | case FL_STATUS: | |
689 | for (;;) { | |
690 | status = map_read(map, adr); | |
691 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
692 | break; | |
693 | ||
694 | /* At this point we're fine with write operations | |
695 | in other partitions as they don't conflict. */ | |
696 | if (chip->priv && map_word_andequal(map, status, status_PWS, status_PWS)) | |
697 | break; | |
698 | ||
699 | if (time_after(jiffies, timeo)) { | |
1f948b43 | 700 | printk(KERN_ERR "%s: Waiting for chip to be ready timed out. Status %lx\n", |
4843653c | 701 | map->name, status.x[0]); |
1da177e4 LT |
702 | return -EIO; |
703 | } | |
704 | spin_unlock(chip->mutex); | |
705 | cfi_udelay(1); | |
706 | spin_lock(chip->mutex); | |
707 | /* Someone else might have been playing with it. */ | |
708 | goto retry; | |
709 | } | |
1f948b43 | 710 | |
1da177e4 LT |
711 | case FL_READY: |
712 | case FL_CFI_QUERY: | |
713 | case FL_JEDEC_QUERY: | |
714 | return 0; | |
715 | ||
716 | case FL_ERASING: | |
717 | if (!cfip || | |
718 | !(cfip->FeatureSupport & 2) || | |
719 | !(mode == FL_READY || mode == FL_POINT || | |
720 | (mode == FL_WRITING && (cfip->SuspendCmdSupport & 1)))) | |
721 | goto sleep; | |
722 | ||
723 | ||
724 | /* Erase suspend */ | |
725 | map_write(map, CMD(0xB0), adr); | |
726 | ||
727 | /* If the flash has finished erasing, then 'erase suspend' | |
728 | * appears to make some (28F320) flash devices switch to | |
729 | * 'read' mode. Make sure that we switch to 'read status' | |
730 | * mode so we get the right data. --rmk | |
731 | */ | |
732 | map_write(map, CMD(0x70), adr); | |
733 | chip->oldstate = FL_ERASING; | |
734 | chip->state = FL_ERASE_SUSPENDING; | |
735 | chip->erase_suspended = 1; | |
736 | for (;;) { | |
737 | status = map_read(map, adr); | |
738 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
739 | break; | |
740 | ||
741 | if (time_after(jiffies, timeo)) { | |
742 | /* Urgh. Resume and pretend we weren't here. */ | |
743 | map_write(map, CMD(0xd0), adr); | |
744 | /* Make sure we're in 'read status' mode if it had finished */ | |
745 | map_write(map, CMD(0x70), adr); | |
746 | chip->state = FL_ERASING; | |
747 | chip->oldstate = FL_READY; | |
4843653c NP |
748 | printk(KERN_ERR "%s: Chip not ready after erase " |
749 | "suspended: status = 0x%lx\n", map->name, status.x[0]); | |
1da177e4 LT |
750 | return -EIO; |
751 | } | |
752 | ||
753 | spin_unlock(chip->mutex); | |
754 | cfi_udelay(1); | |
755 | spin_lock(chip->mutex); | |
756 | /* Nobody will touch it while it's in state FL_ERASE_SUSPENDING. | |
757 | So we can just loop here. */ | |
758 | } | |
759 | chip->state = FL_STATUS; | |
760 | return 0; | |
761 | ||
762 | case FL_XIP_WHILE_ERASING: | |
763 | if (mode != FL_READY && mode != FL_POINT && | |
764 | (mode != FL_WRITING || !cfip || !(cfip->SuspendCmdSupport&1))) | |
765 | goto sleep; | |
766 | chip->oldstate = chip->state; | |
767 | chip->state = FL_READY; | |
768 | return 0; | |
769 | ||
770 | case FL_POINT: | |
771 | /* Only if there's no operation suspended... */ | |
772 | if (mode == FL_READY && chip->oldstate == FL_READY) | |
773 | return 0; | |
774 | ||
775 | default: | |
776 | sleep: | |
777 | set_current_state(TASK_UNINTERRUPTIBLE); | |
778 | add_wait_queue(&chip->wq, &wait); | |
779 | spin_unlock(chip->mutex); | |
780 | schedule(); | |
781 | remove_wait_queue(&chip->wq, &wait); | |
782 | spin_lock(chip->mutex); | |
783 | goto resettime; | |
784 | } | |
785 | } | |
786 | ||
787 | static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr) | |
788 | { | |
789 | struct cfi_private *cfi = map->fldrv_priv; | |
790 | ||
791 | if (chip->priv) { | |
792 | struct flchip_shared *shared = chip->priv; | |
793 | spin_lock(&shared->lock); | |
794 | if (shared->writing == chip && chip->oldstate == FL_READY) { | |
795 | /* We own the ability to write, but we're done */ | |
796 | shared->writing = shared->erasing; | |
797 | if (shared->writing && shared->writing != chip) { | |
798 | /* give back ownership to who we loaned it from */ | |
799 | struct flchip *loaner = shared->writing; | |
800 | spin_lock(loaner->mutex); | |
801 | spin_unlock(&shared->lock); | |
802 | spin_unlock(chip->mutex); | |
803 | put_chip(map, loaner, loaner->start); | |
804 | spin_lock(chip->mutex); | |
805 | spin_unlock(loaner->mutex); | |
806 | wake_up(&chip->wq); | |
807 | return; | |
808 | } | |
809 | shared->erasing = NULL; | |
810 | shared->writing = NULL; | |
811 | } else if (shared->erasing == chip && shared->writing != chip) { | |
812 | /* | |
813 | * We own the ability to erase without the ability | |
814 | * to write, which means the erase was suspended | |
815 | * and some other partition is currently writing. | |
816 | * Don't let the switch below mess things up since | |
817 | * we don't have ownership to resume anything. | |
818 | */ | |
819 | spin_unlock(&shared->lock); | |
820 | wake_up(&chip->wq); | |
821 | return; | |
822 | } | |
823 | spin_unlock(&shared->lock); | |
824 | } | |
825 | ||
826 | switch(chip->oldstate) { | |
827 | case FL_ERASING: | |
828 | chip->state = chip->oldstate; | |
1f948b43 | 829 | /* What if one interleaved chip has finished and the |
1da177e4 | 830 | other hasn't? The old code would leave the finished |
1f948b43 | 831 | one in READY mode. That's bad, and caused -EROFS |
1da177e4 LT |
832 | errors to be returned from do_erase_oneblock because |
833 | that's the only bit it checked for at the time. | |
1f948b43 | 834 | As the state machine appears to explicitly allow |
1da177e4 | 835 | sending the 0x70 (Read Status) command to an erasing |
1f948b43 | 836 | chip and expecting it to be ignored, that's what we |
1da177e4 LT |
837 | do. */ |
838 | map_write(map, CMD(0xd0), adr); | |
839 | map_write(map, CMD(0x70), adr); | |
840 | chip->oldstate = FL_READY; | |
841 | chip->state = FL_ERASING; | |
842 | break; | |
843 | ||
844 | case FL_XIP_WHILE_ERASING: | |
845 | chip->state = chip->oldstate; | |
846 | chip->oldstate = FL_READY; | |
847 | break; | |
848 | ||
849 | case FL_READY: | |
850 | case FL_STATUS: | |
851 | case FL_JEDEC_QUERY: | |
852 | /* We should really make set_vpp() count, rather than doing this */ | |
853 | DISABLE_VPP(map); | |
854 | break; | |
855 | default: | |
4843653c | 856 | printk(KERN_ERR "%s: put_chip() called with oldstate %d!!\n", map->name, chip->oldstate); |
1da177e4 LT |
857 | } |
858 | wake_up(&chip->wq); | |
859 | } | |
860 | ||
861 | #ifdef CONFIG_MTD_XIP | |
862 | ||
863 | /* | |
864 | * No interrupt what so ever can be serviced while the flash isn't in array | |
865 | * mode. This is ensured by the xip_disable() and xip_enable() functions | |
866 | * enclosing any code path where the flash is known not to be in array mode. | |
867 | * And within a XIP disabled code path, only functions marked with __xipram | |
868 | * may be called and nothing else (it's a good thing to inspect generated | |
869 | * assembly to make sure inline functions were actually inlined and that gcc | |
870 | * didn't emit calls to its own support functions). Also configuring MTD CFI | |
871 | * support to a single buswidth and a single interleave is also recommended. | |
1da177e4 LT |
872 | */ |
873 | ||
874 | static void xip_disable(struct map_info *map, struct flchip *chip, | |
875 | unsigned long adr) | |
876 | { | |
877 | /* TODO: chips with no XIP use should ignore and return */ | |
878 | (void) map_read(map, adr); /* ensure mmu mapping is up to date */ | |
1da177e4 LT |
879 | local_irq_disable(); |
880 | } | |
881 | ||
882 | static void __xipram xip_enable(struct map_info *map, struct flchip *chip, | |
883 | unsigned long adr) | |
884 | { | |
885 | struct cfi_private *cfi = map->fldrv_priv; | |
886 | if (chip->state != FL_POINT && chip->state != FL_READY) { | |
887 | map_write(map, CMD(0xff), adr); | |
888 | chip->state = FL_READY; | |
889 | } | |
890 | (void) map_read(map, adr); | |
97f927a4 | 891 | xip_iprefetch(); |
1da177e4 | 892 | local_irq_enable(); |
1da177e4 LT |
893 | } |
894 | ||
895 | /* | |
896 | * When a delay is required for the flash operation to complete, the | |
c172471b NP |
897 | * xip_wait_for_operation() function is polling for both the given timeout |
898 | * and pending (but still masked) hardware interrupts. Whenever there is an | |
899 | * interrupt pending then the flash erase or write operation is suspended, | |
900 | * array mode restored and interrupts unmasked. Task scheduling might also | |
901 | * happen at that point. The CPU eventually returns from the interrupt or | |
902 | * the call to schedule() and the suspended flash operation is resumed for | |
903 | * the remaining of the delay period. | |
1da177e4 LT |
904 | * |
905 | * Warning: this function _will_ fool interrupt latency tracing tools. | |
906 | */ | |
907 | ||
c172471b NP |
908 | static int __xipram xip_wait_for_operation( |
909 | struct map_info *map, struct flchip *chip, | |
910 | unsigned long adr, int *chip_op_time ) | |
1da177e4 LT |
911 | { |
912 | struct cfi_private *cfi = map->fldrv_priv; | |
913 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; | |
914 | map_word status, OK = CMD(0x80); | |
c172471b | 915 | unsigned long usec, suspended, start, done; |
1da177e4 LT |
916 | flstate_t oldstate, newstate; |
917 | ||
c172471b NP |
918 | start = xip_currtime(); |
919 | usec = *chip_op_time * 8; | |
920 | if (usec == 0) | |
921 | usec = 500000; | |
922 | done = 0; | |
923 | ||
1da177e4 LT |
924 | do { |
925 | cpu_relax(); | |
926 | if (xip_irqpending() && cfip && | |
927 | ((chip->state == FL_ERASING && (cfip->FeatureSupport&2)) || | |
928 | (chip->state == FL_WRITING && (cfip->FeatureSupport&4))) && | |
929 | (cfi_interleave_is_1(cfi) || chip->oldstate == FL_READY)) { | |
930 | /* | |
931 | * Let's suspend the erase or write operation when | |
932 | * supported. Note that we currently don't try to | |
933 | * suspend interleaved chips if there is already | |
934 | * another operation suspended (imagine what happens | |
935 | * when one chip was already done with the current | |
936 | * operation while another chip suspended it, then | |
937 | * we resume the whole thing at once). Yes, it | |
938 | * can happen! | |
939 | */ | |
c172471b | 940 | usec -= done; |
1da177e4 LT |
941 | map_write(map, CMD(0xb0), adr); |
942 | map_write(map, CMD(0x70), adr); | |
1da177e4 LT |
943 | suspended = xip_currtime(); |
944 | do { | |
945 | if (xip_elapsed_since(suspended) > 100000) { | |
946 | /* | |
947 | * The chip doesn't want to suspend | |
948 | * after waiting for 100 msecs. | |
949 | * This is a critical error but there | |
950 | * is not much we can do here. | |
951 | */ | |
c172471b | 952 | return -EIO; |
1da177e4 LT |
953 | } |
954 | status = map_read(map, adr); | |
955 | } while (!map_word_andequal(map, status, OK, OK)); | |
956 | ||
957 | /* Suspend succeeded */ | |
958 | oldstate = chip->state; | |
959 | if (oldstate == FL_ERASING) { | |
960 | if (!map_word_bitsset(map, status, CMD(0x40))) | |
961 | break; | |
962 | newstate = FL_XIP_WHILE_ERASING; | |
963 | chip->erase_suspended = 1; | |
964 | } else { | |
965 | if (!map_word_bitsset(map, status, CMD(0x04))) | |
966 | break; | |
967 | newstate = FL_XIP_WHILE_WRITING; | |
968 | chip->write_suspended = 1; | |
969 | } | |
970 | chip->state = newstate; | |
971 | map_write(map, CMD(0xff), adr); | |
972 | (void) map_read(map, adr); | |
973 | asm volatile (".rep 8; nop; .endr"); | |
974 | local_irq_enable(); | |
6da70124 | 975 | spin_unlock(chip->mutex); |
1da177e4 LT |
976 | asm volatile (".rep 8; nop; .endr"); |
977 | cond_resched(); | |
978 | ||
979 | /* | |
980 | * We're back. However someone else might have | |
981 | * decided to go write to the chip if we are in | |
982 | * a suspended erase state. If so let's wait | |
983 | * until it's done. | |
984 | */ | |
6da70124 | 985 | spin_lock(chip->mutex); |
1da177e4 LT |
986 | while (chip->state != newstate) { |
987 | DECLARE_WAITQUEUE(wait, current); | |
988 | set_current_state(TASK_UNINTERRUPTIBLE); | |
989 | add_wait_queue(&chip->wq, &wait); | |
6da70124 | 990 | spin_unlock(chip->mutex); |
1da177e4 LT |
991 | schedule(); |
992 | remove_wait_queue(&chip->wq, &wait); | |
6da70124 | 993 | spin_lock(chip->mutex); |
1da177e4 LT |
994 | } |
995 | /* Disallow XIP again */ | |
996 | local_irq_disable(); | |
997 | ||
998 | /* Resume the write or erase operation */ | |
999 | map_write(map, CMD(0xd0), adr); | |
1000 | map_write(map, CMD(0x70), adr); | |
1001 | chip->state = oldstate; | |
1002 | start = xip_currtime(); | |
1003 | } else if (usec >= 1000000/HZ) { | |
1004 | /* | |
1005 | * Try to save on CPU power when waiting delay | |
1006 | * is at least a system timer tick period. | |
1007 | * No need to be extremely accurate here. | |
1008 | */ | |
1009 | xip_cpu_idle(); | |
1010 | } | |
1011 | status = map_read(map, adr); | |
c172471b | 1012 | done = xip_elapsed_since(start); |
1da177e4 | 1013 | } while (!map_word_andequal(map, status, OK, OK) |
c172471b | 1014 | && done < usec); |
1da177e4 | 1015 | |
c172471b NP |
1016 | return (done >= usec) ? -ETIME : 0; |
1017 | } | |
1da177e4 LT |
1018 | |
1019 | /* | |
1020 | * The INVALIDATE_CACHED_RANGE() macro is normally used in parallel while | |
1021 | * the flash is actively programming or erasing since we have to poll for | |
1022 | * the operation to complete anyway. We can't do that in a generic way with | |
6da70124 | 1023 | * a XIP setup so do it before the actual flash operation in this case |
c172471b | 1024 | * and stub it out from INVAL_CACHE_AND_WAIT. |
1da177e4 | 1025 | */ |
6da70124 NP |
1026 | #define XIP_INVAL_CACHED_RANGE(map, from, size) \ |
1027 | INVALIDATE_CACHED_RANGE(map, from, size) | |
1028 | ||
c172471b NP |
1029 | #define INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, inval_adr, inval_len, p_usec) \ |
1030 | xip_wait_for_operation(map, chip, cmd_adr, p_usec) | |
1da177e4 LT |
1031 | |
1032 | #else | |
1033 | ||
1034 | #define xip_disable(map, chip, adr) | |
1035 | #define xip_enable(map, chip, adr) | |
1da177e4 | 1036 | #define XIP_INVAL_CACHED_RANGE(x...) |
c172471b NP |
1037 | #define INVAL_CACHE_AND_WAIT inval_cache_and_wait_for_operation |
1038 | ||
1039 | static int inval_cache_and_wait_for_operation( | |
1040 | struct map_info *map, struct flchip *chip, | |
1041 | unsigned long cmd_adr, unsigned long inval_adr, int inval_len, | |
1042 | int *chip_op_time ) | |
1043 | { | |
1044 | struct cfi_private *cfi = map->fldrv_priv; | |
1045 | map_word status, status_OK = CMD(0x80); | |
1046 | int z, chip_state = chip->state; | |
1047 | unsigned long timeo; | |
1048 | ||
1049 | spin_unlock(chip->mutex); | |
1050 | if (inval_len) | |
1051 | INVALIDATE_CACHED_RANGE(map, inval_adr, inval_len); | |
1052 | if (*chip_op_time) | |
1053 | cfi_udelay(*chip_op_time); | |
1054 | spin_lock(chip->mutex); | |
1055 | ||
1056 | timeo = *chip_op_time * 8 * HZ / 1000000; | |
1057 | if (timeo < HZ/2) | |
1058 | timeo = HZ/2; | |
1059 | timeo += jiffies; | |
1060 | ||
1061 | z = 0; | |
1062 | for (;;) { | |
1063 | if (chip->state != chip_state) { | |
1064 | /* Someone's suspended the operation: sleep */ | |
1065 | DECLARE_WAITQUEUE(wait, current); | |
1066 | ||
1067 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1068 | add_wait_queue(&chip->wq, &wait); | |
1069 | spin_unlock(chip->mutex); | |
1070 | schedule(); | |
1071 | remove_wait_queue(&chip->wq, &wait); | |
1072 | timeo = jiffies + (HZ / 2); /* FIXME */ | |
1073 | spin_lock(chip->mutex); | |
1074 | continue; | |
1075 | } | |
1076 | ||
1077 | status = map_read(map, cmd_adr); | |
1078 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
1079 | break; | |
1da177e4 | 1080 | |
c172471b NP |
1081 | /* OK Still waiting */ |
1082 | if (time_after(jiffies, timeo)) { | |
1083 | map_write(map, CMD(0x70), cmd_adr); | |
1084 | chip->state = FL_STATUS; | |
1085 | return -ETIME; | |
1086 | } | |
1087 | ||
1088 | /* Latency issues. Drop the lock, wait a while and retry */ | |
1089 | z++; | |
1090 | spin_unlock(chip->mutex); | |
1091 | cfi_udelay(1); | |
1092 | spin_lock(chip->mutex); | |
1093 | } | |
1094 | ||
1095 | if (!z) { | |
1096 | if (!--(*chip_op_time)) | |
1097 | *chip_op_time = 1; | |
1098 | } else if (z > 1) | |
1099 | ++(*chip_op_time); | |
1100 | ||
1101 | /* Done and happy. */ | |
1102 | chip->state = FL_STATUS; | |
1103 | return 0; | |
1104 | } | |
6da70124 | 1105 | |
1da177e4 LT |
1106 | #endif |
1107 | ||
c172471b NP |
1108 | #define WAIT_TIMEOUT(map, chip, adr, udelay) \ |
1109 | ({ int __udelay = (udelay); \ | |
1110 | INVAL_CACHE_AND_WAIT(map, chip, adr, 0, 0, &__udelay); }) | |
1111 | ||
1112 | ||
1da177e4 LT |
1113 | static int do_point_onechip (struct map_info *map, struct flchip *chip, loff_t adr, size_t len) |
1114 | { | |
1115 | unsigned long cmd_addr; | |
1116 | struct cfi_private *cfi = map->fldrv_priv; | |
1117 | int ret = 0; | |
1118 | ||
1119 | adr += chip->start; | |
1120 | ||
1f948b43 TG |
1121 | /* Ensure cmd read/writes are aligned. */ |
1122 | cmd_addr = adr & ~(map_bankwidth(map)-1); | |
1da177e4 LT |
1123 | |
1124 | spin_lock(chip->mutex); | |
1125 | ||
1126 | ret = get_chip(map, chip, cmd_addr, FL_POINT); | |
1127 | ||
1128 | if (!ret) { | |
1129 | if (chip->state != FL_POINT && chip->state != FL_READY) | |
1130 | map_write(map, CMD(0xff), cmd_addr); | |
1131 | ||
1132 | chip->state = FL_POINT; | |
1133 | chip->ref_point_counter++; | |
1134 | } | |
1135 | spin_unlock(chip->mutex); | |
1136 | ||
1137 | return ret; | |
1138 | } | |
1139 | ||
1140 | static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf) | |
1141 | { | |
1142 | struct map_info *map = mtd->priv; | |
1143 | struct cfi_private *cfi = map->fldrv_priv; | |
1144 | unsigned long ofs; | |
1145 | int chipnum; | |
1146 | int ret = 0; | |
1147 | ||
1148 | if (!map->virt || (from + len > mtd->size)) | |
1149 | return -EINVAL; | |
1f948b43 | 1150 | |
1da177e4 LT |
1151 | *mtdbuf = (void *)map->virt + from; |
1152 | *retlen = 0; | |
1153 | ||
1154 | /* Now lock the chip(s) to POINT state */ | |
1155 | ||
1156 | /* ofs: offset within the first chip that the first read should start */ | |
1157 | chipnum = (from >> cfi->chipshift); | |
1158 | ofs = from - (chipnum << cfi->chipshift); | |
1159 | ||
1160 | while (len) { | |
1161 | unsigned long thislen; | |
1162 | ||
1163 | if (chipnum >= cfi->numchips) | |
1164 | break; | |
1165 | ||
1166 | if ((len + ofs -1) >> cfi->chipshift) | |
1167 | thislen = (1<<cfi->chipshift) - ofs; | |
1168 | else | |
1169 | thislen = len; | |
1170 | ||
1171 | ret = do_point_onechip(map, &cfi->chips[chipnum], ofs, thislen); | |
1172 | if (ret) | |
1173 | break; | |
1174 | ||
1175 | *retlen += thislen; | |
1176 | len -= thislen; | |
1f948b43 | 1177 | |
1da177e4 LT |
1178 | ofs = 0; |
1179 | chipnum++; | |
1180 | } | |
1181 | return 0; | |
1182 | } | |
1183 | ||
1184 | static void cfi_intelext_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, size_t len) | |
1185 | { | |
1186 | struct map_info *map = mtd->priv; | |
1187 | struct cfi_private *cfi = map->fldrv_priv; | |
1188 | unsigned long ofs; | |
1189 | int chipnum; | |
1190 | ||
1191 | /* Now unlock the chip(s) POINT state */ | |
1192 | ||
1193 | /* ofs: offset within the first chip that the first read should start */ | |
1194 | chipnum = (from >> cfi->chipshift); | |
1195 | ofs = from - (chipnum << cfi->chipshift); | |
1196 | ||
1197 | while (len) { | |
1198 | unsigned long thislen; | |
1199 | struct flchip *chip; | |
1200 | ||
1201 | chip = &cfi->chips[chipnum]; | |
1202 | if (chipnum >= cfi->numchips) | |
1203 | break; | |
1204 | ||
1205 | if ((len + ofs -1) >> cfi->chipshift) | |
1206 | thislen = (1<<cfi->chipshift) - ofs; | |
1207 | else | |
1208 | thislen = len; | |
1209 | ||
1210 | spin_lock(chip->mutex); | |
1211 | if (chip->state == FL_POINT) { | |
1212 | chip->ref_point_counter--; | |
1213 | if(chip->ref_point_counter == 0) | |
1214 | chip->state = FL_READY; | |
1215 | } else | |
4843653c | 1216 | printk(KERN_ERR "%s: Warning: unpoint called on non pointed region\n", map->name); /* Should this give an error? */ |
1da177e4 LT |
1217 | |
1218 | put_chip(map, chip, chip->start); | |
1219 | spin_unlock(chip->mutex); | |
1220 | ||
1221 | len -= thislen; | |
1222 | ofs = 0; | |
1223 | chipnum++; | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) | |
1228 | { | |
1229 | unsigned long cmd_addr; | |
1230 | struct cfi_private *cfi = map->fldrv_priv; | |
1231 | int ret; | |
1232 | ||
1233 | adr += chip->start; | |
1234 | ||
1f948b43 TG |
1235 | /* Ensure cmd read/writes are aligned. */ |
1236 | cmd_addr = adr & ~(map_bankwidth(map)-1); | |
1da177e4 LT |
1237 | |
1238 | spin_lock(chip->mutex); | |
1239 | ret = get_chip(map, chip, cmd_addr, FL_READY); | |
1240 | if (ret) { | |
1241 | spin_unlock(chip->mutex); | |
1242 | return ret; | |
1243 | } | |
1244 | ||
1245 | if (chip->state != FL_POINT && chip->state != FL_READY) { | |
1246 | map_write(map, CMD(0xff), cmd_addr); | |
1247 | ||
1248 | chip->state = FL_READY; | |
1249 | } | |
1250 | ||
1251 | map_copy_from(map, buf, adr, len); | |
1252 | ||
1253 | put_chip(map, chip, cmd_addr); | |
1254 | ||
1255 | spin_unlock(chip->mutex); | |
1256 | return 0; | |
1257 | } | |
1258 | ||
1259 | static int cfi_intelext_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) | |
1260 | { | |
1261 | struct map_info *map = mtd->priv; | |
1262 | struct cfi_private *cfi = map->fldrv_priv; | |
1263 | unsigned long ofs; | |
1264 | int chipnum; | |
1265 | int ret = 0; | |
1266 | ||
1267 | /* ofs: offset within the first chip that the first read should start */ | |
1268 | chipnum = (from >> cfi->chipshift); | |
1269 | ofs = from - (chipnum << cfi->chipshift); | |
1270 | ||
1271 | *retlen = 0; | |
1272 | ||
1273 | while (len) { | |
1274 | unsigned long thislen; | |
1275 | ||
1276 | if (chipnum >= cfi->numchips) | |
1277 | break; | |
1278 | ||
1279 | if ((len + ofs -1) >> cfi->chipshift) | |
1280 | thislen = (1<<cfi->chipshift) - ofs; | |
1281 | else | |
1282 | thislen = len; | |
1283 | ||
1284 | ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); | |
1285 | if (ret) | |
1286 | break; | |
1287 | ||
1288 | *retlen += thislen; | |
1289 | len -= thislen; | |
1290 | buf += thislen; | |
1f948b43 | 1291 | |
1da177e4 LT |
1292 | ofs = 0; |
1293 | chipnum++; | |
1294 | } | |
1295 | return ret; | |
1296 | } | |
1297 | ||
1da177e4 | 1298 | static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, |
f77814dd | 1299 | unsigned long adr, map_word datum, int mode) |
1da177e4 LT |
1300 | { |
1301 | struct cfi_private *cfi = map->fldrv_priv; | |
c172471b NP |
1302 | map_word status, write_cmd; |
1303 | int ret=0; | |
1da177e4 LT |
1304 | |
1305 | adr += chip->start; | |
1306 | ||
f77814dd | 1307 | switch (mode) { |
638d9838 NP |
1308 | case FL_WRITING: |
1309 | write_cmd = (cfi->cfiq->P_ID != 0x0200) ? CMD(0x40) : CMD(0x41); | |
1310 | break; | |
1311 | case FL_OTP_WRITE: | |
1312 | write_cmd = CMD(0xc0); | |
1313 | break; | |
1314 | default: | |
1315 | return -EINVAL; | |
f77814dd | 1316 | } |
1da177e4 LT |
1317 | |
1318 | spin_lock(chip->mutex); | |
f77814dd | 1319 | ret = get_chip(map, chip, adr, mode); |
1da177e4 LT |
1320 | if (ret) { |
1321 | spin_unlock(chip->mutex); | |
1322 | return ret; | |
1323 | } | |
1324 | ||
1325 | XIP_INVAL_CACHED_RANGE(map, adr, map_bankwidth(map)); | |
1326 | ENABLE_VPP(map); | |
1327 | xip_disable(map, chip, adr); | |
f77814dd | 1328 | map_write(map, write_cmd, adr); |
1da177e4 | 1329 | map_write(map, datum, adr); |
f77814dd | 1330 | chip->state = mode; |
1da177e4 | 1331 | |
c172471b NP |
1332 | ret = INVAL_CACHE_AND_WAIT(map, chip, adr, |
1333 | adr, map_bankwidth(map), | |
1334 | &chip->word_write_time); | |
1335 | if (ret) { | |
1336 | xip_enable(map, chip, adr); | |
1337 | printk(KERN_ERR "%s: word write error (status timeout)\n", map->name); | |
1338 | goto out; | |
1da177e4 | 1339 | } |
1da177e4 | 1340 | |
4843653c | 1341 | /* check for errors */ |
c172471b | 1342 | status = map_read(map, adr); |
4843653c NP |
1343 | if (map_word_bitsset(map, status, CMD(0x1a))) { |
1344 | unsigned long chipstatus = MERGESTATUS(status); | |
1345 | ||
1346 | /* reset status */ | |
1da177e4 | 1347 | map_write(map, CMD(0x50), adr); |
1da177e4 | 1348 | map_write(map, CMD(0x70), adr); |
4843653c NP |
1349 | xip_enable(map, chip, adr); |
1350 | ||
1351 | if (chipstatus & 0x02) { | |
1352 | ret = -EROFS; | |
1353 | } else if (chipstatus & 0x08) { | |
1354 | printk(KERN_ERR "%s: word write error (bad VPP)\n", map->name); | |
1355 | ret = -EIO; | |
1356 | } else { | |
1357 | printk(KERN_ERR "%s: word write error (status 0x%lx)\n", map->name, chipstatus); | |
1358 | ret = -EINVAL; | |
1359 | } | |
1360 | ||
1361 | goto out; | |
1da177e4 LT |
1362 | } |
1363 | ||
1364 | xip_enable(map, chip, adr); | |
1365 | out: put_chip(map, chip, adr); | |
1366 | spin_unlock(chip->mutex); | |
1da177e4 LT |
1367 | return ret; |
1368 | } | |
1369 | ||
1370 | ||
1371 | static int cfi_intelext_write_words (struct mtd_info *mtd, loff_t to , size_t len, size_t *retlen, const u_char *buf) | |
1372 | { | |
1373 | struct map_info *map = mtd->priv; | |
1374 | struct cfi_private *cfi = map->fldrv_priv; | |
1375 | int ret = 0; | |
1376 | int chipnum; | |
1377 | unsigned long ofs; | |
1378 | ||
1379 | *retlen = 0; | |
1380 | if (!len) | |
1381 | return 0; | |
1382 | ||
1383 | chipnum = to >> cfi->chipshift; | |
1384 | ofs = to - (chipnum << cfi->chipshift); | |
1385 | ||
1386 | /* If it's not bus-aligned, do the first byte write */ | |
1387 | if (ofs & (map_bankwidth(map)-1)) { | |
1388 | unsigned long bus_ofs = ofs & ~(map_bankwidth(map)-1); | |
1389 | int gap = ofs - bus_ofs; | |
1390 | int n; | |
1391 | map_word datum; | |
1392 | ||
1393 | n = min_t(int, len, map_bankwidth(map)-gap); | |
1394 | datum = map_word_ff(map); | |
1395 | datum = map_word_load_partial(map, datum, buf, gap, n); | |
1396 | ||
1397 | ret = do_write_oneword(map, &cfi->chips[chipnum], | |
f77814dd | 1398 | bus_ofs, datum, FL_WRITING); |
1f948b43 | 1399 | if (ret) |
1da177e4 LT |
1400 | return ret; |
1401 | ||
1402 | len -= n; | |
1403 | ofs += n; | |
1404 | buf += n; | |
1405 | (*retlen) += n; | |
1406 | ||
1407 | if (ofs >> cfi->chipshift) { | |
1f948b43 | 1408 | chipnum ++; |
1da177e4 LT |
1409 | ofs = 0; |
1410 | if (chipnum == cfi->numchips) | |
1411 | return 0; | |
1412 | } | |
1413 | } | |
1f948b43 | 1414 | |
1da177e4 LT |
1415 | while(len >= map_bankwidth(map)) { |
1416 | map_word datum = map_word_load(map, buf); | |
1417 | ||
1418 | ret = do_write_oneword(map, &cfi->chips[chipnum], | |
f77814dd | 1419 | ofs, datum, FL_WRITING); |
1da177e4 LT |
1420 | if (ret) |
1421 | return ret; | |
1422 | ||
1423 | ofs += map_bankwidth(map); | |
1424 | buf += map_bankwidth(map); | |
1425 | (*retlen) += map_bankwidth(map); | |
1426 | len -= map_bankwidth(map); | |
1427 | ||
1428 | if (ofs >> cfi->chipshift) { | |
1f948b43 | 1429 | chipnum ++; |
1da177e4 LT |
1430 | ofs = 0; |
1431 | if (chipnum == cfi->numchips) | |
1432 | return 0; | |
1433 | } | |
1434 | } | |
1435 | ||
1436 | if (len & (map_bankwidth(map)-1)) { | |
1437 | map_word datum; | |
1438 | ||
1439 | datum = map_word_ff(map); | |
1440 | datum = map_word_load_partial(map, datum, buf, 0, len); | |
1441 | ||
1442 | ret = do_write_oneword(map, &cfi->chips[chipnum], | |
f77814dd | 1443 | ofs, datum, FL_WRITING); |
1f948b43 | 1444 | if (ret) |
1da177e4 | 1445 | return ret; |
1f948b43 | 1446 | |
1da177e4 LT |
1447 | (*retlen) += len; |
1448 | } | |
1449 | ||
1450 | return 0; | |
1451 | } | |
1452 | ||
1453 | ||
1f948b43 | 1454 | static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, |
e102d54a NP |
1455 | unsigned long adr, const struct kvec **pvec, |
1456 | unsigned long *pvec_seek, int len) | |
1da177e4 LT |
1457 | { |
1458 | struct cfi_private *cfi = map->fldrv_priv; | |
c172471b NP |
1459 | map_word status, write_cmd, datum; |
1460 | unsigned long cmd_adr; | |
1461 | int ret, wbufsize, word_gap, words; | |
e102d54a NP |
1462 | const struct kvec *vec; |
1463 | unsigned long vec_seek; | |
1da177e4 LT |
1464 | |
1465 | wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; | |
1466 | adr += chip->start; | |
1467 | cmd_adr = adr & ~(wbufsize-1); | |
638d9838 | 1468 | |
1da177e4 | 1469 | /* Let's determine this according to the interleave only once */ |
638d9838 | 1470 | write_cmd = (cfi->cfiq->P_ID != 0x0200) ? CMD(0xe8) : CMD(0xe9); |
1da177e4 LT |
1471 | |
1472 | spin_lock(chip->mutex); | |
1473 | ret = get_chip(map, chip, cmd_adr, FL_WRITING); | |
1474 | if (ret) { | |
1475 | spin_unlock(chip->mutex); | |
1476 | return ret; | |
1477 | } | |
1478 | ||
1479 | XIP_INVAL_CACHED_RANGE(map, adr, len); | |
1480 | ENABLE_VPP(map); | |
1481 | xip_disable(map, chip, cmd_adr); | |
1482 | ||
151e7659 | 1483 | /* §4.8 of the 28FxxxJ3A datasheet says "Any time SR.4 and/or SR.5 is set |
1f948b43 | 1484 | [...], the device will not accept any more Write to Buffer commands". |
1da177e4 LT |
1485 | So we must check here and reset those bits if they're set. Otherwise |
1486 | we're just pissing in the wind */ | |
6e7a6809 | 1487 | if (chip->state != FL_STATUS) { |
1da177e4 | 1488 | map_write(map, CMD(0x70), cmd_adr); |
6e7a6809 NP |
1489 | chip->state = FL_STATUS; |
1490 | } | |
1da177e4 LT |
1491 | status = map_read(map, cmd_adr); |
1492 | if (map_word_bitsset(map, status, CMD(0x30))) { | |
1493 | xip_enable(map, chip, cmd_adr); | |
1494 | printk(KERN_WARNING "SR.4 or SR.5 bits set in buffer write (status %lx). Clearing.\n", status.x[0]); | |
1495 | xip_disable(map, chip, cmd_adr); | |
1496 | map_write(map, CMD(0x50), cmd_adr); | |
1497 | map_write(map, CMD(0x70), cmd_adr); | |
1498 | } | |
1499 | ||
1500 | chip->state = FL_WRITING_TO_BUFFER; | |
c172471b NP |
1501 | map_write(map, write_cmd, cmd_adr); |
1502 | ret = WAIT_TIMEOUT(map, chip, cmd_adr, 0); | |
1503 | if (ret) { | |
1504 | /* Argh. Not ready for write to buffer */ | |
1505 | map_word Xstatus = map_read(map, cmd_adr); | |
1506 | map_write(map, CMD(0x70), cmd_adr); | |
1507 | chip->state = FL_STATUS; | |
1da177e4 | 1508 | status = map_read(map, cmd_adr); |
c172471b NP |
1509 | map_write(map, CMD(0x50), cmd_adr); |
1510 | map_write(map, CMD(0x70), cmd_adr); | |
1511 | xip_enable(map, chip, cmd_adr); | |
1512 | printk(KERN_ERR "%s: Chip not ready for buffer write. Xstatus = %lx, status = %lx\n", | |
1513 | map->name, Xstatus.x[0], status.x[0]); | |
1514 | goto out; | |
1da177e4 LT |
1515 | } |
1516 | ||
e102d54a NP |
1517 | /* Figure out the number of words to write */ |
1518 | word_gap = (-adr & (map_bankwidth(map)-1)); | |
1519 | words = (len - word_gap + map_bankwidth(map) - 1) / map_bankwidth(map); | |
1520 | if (!word_gap) { | |
1521 | words--; | |
1522 | } else { | |
1523 | word_gap = map_bankwidth(map) - word_gap; | |
1524 | adr -= word_gap; | |
1525 | datum = map_word_ff(map); | |
1526 | } | |
1527 | ||
1da177e4 | 1528 | /* Write length of data to come */ |
e102d54a | 1529 | map_write(map, CMD(words), cmd_adr ); |
1da177e4 LT |
1530 | |
1531 | /* Write data */ | |
e102d54a NP |
1532 | vec = *pvec; |
1533 | vec_seek = *pvec_seek; | |
1534 | do { | |
1535 | int n = map_bankwidth(map) - word_gap; | |
1536 | if (n > vec->iov_len - vec_seek) | |
1537 | n = vec->iov_len - vec_seek; | |
1538 | if (n > len) | |
1539 | n = len; | |
1da177e4 | 1540 | |
e102d54a NP |
1541 | if (!word_gap && len < map_bankwidth(map)) |
1542 | datum = map_word_ff(map); | |
1da177e4 | 1543 | |
e102d54a | 1544 | datum = map_word_load_partial(map, datum, |
1f948b43 | 1545 | vec->iov_base + vec_seek, |
e102d54a | 1546 | word_gap, n); |
1da177e4 | 1547 | |
e102d54a NP |
1548 | len -= n; |
1549 | word_gap += n; | |
1550 | if (!len || word_gap == map_bankwidth(map)) { | |
1551 | map_write(map, datum, adr); | |
1552 | adr += map_bankwidth(map); | |
1553 | word_gap = 0; | |
1554 | } | |
1da177e4 | 1555 | |
e102d54a NP |
1556 | vec_seek += n; |
1557 | if (vec_seek == vec->iov_len) { | |
1558 | vec++; | |
1559 | vec_seek = 0; | |
1560 | } | |
1561 | } while (len); | |
1562 | *pvec = vec; | |
1563 | *pvec_seek = vec_seek; | |
1da177e4 LT |
1564 | |
1565 | /* GO GO GO */ | |
1566 | map_write(map, CMD(0xd0), cmd_adr); | |
1567 | chip->state = FL_WRITING; | |
1568 | ||
c172471b NP |
1569 | ret = INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, |
1570 | adr, len, | |
1571 | &chip->buffer_write_time); | |
1572 | if (ret) { | |
1573 | map_write(map, CMD(0x70), cmd_adr); | |
1574 | chip->state = FL_STATUS; | |
1575 | xip_enable(map, chip, cmd_adr); | |
1576 | printk(KERN_ERR "%s: buffer write error (status timeout)\n", map->name); | |
1577 | goto out; | |
1da177e4 | 1578 | } |
1da177e4 | 1579 | |
4843653c | 1580 | /* check for errors */ |
c172471b | 1581 | status = map_read(map, cmd_adr); |
4843653c NP |
1582 | if (map_word_bitsset(map, status, CMD(0x1a))) { |
1583 | unsigned long chipstatus = MERGESTATUS(status); | |
1584 | ||
1585 | /* reset status */ | |
1da177e4 | 1586 | map_write(map, CMD(0x50), cmd_adr); |
4843653c NP |
1587 | map_write(map, CMD(0x70), cmd_adr); |
1588 | xip_enable(map, chip, cmd_adr); | |
1589 | ||
1590 | if (chipstatus & 0x02) { | |
1591 | ret = -EROFS; | |
1592 | } else if (chipstatus & 0x08) { | |
1593 | printk(KERN_ERR "%s: buffer write error (bad VPP)\n", map->name); | |
1594 | ret = -EIO; | |
1595 | } else { | |
1596 | printk(KERN_ERR "%s: buffer write error (status 0x%lx)\n", map->name, chipstatus); | |
1597 | ret = -EINVAL; | |
1598 | } | |
1599 | ||
1600 | goto out; | |
1da177e4 LT |
1601 | } |
1602 | ||
1603 | xip_enable(map, chip, cmd_adr); | |
1604 | out: put_chip(map, chip, cmd_adr); | |
1605 | spin_unlock(chip->mutex); | |
1606 | return ret; | |
1607 | } | |
1608 | ||
e102d54a NP |
1609 | static int cfi_intelext_writev (struct mtd_info *mtd, const struct kvec *vecs, |
1610 | unsigned long count, loff_t to, size_t *retlen) | |
1da177e4 LT |
1611 | { |
1612 | struct map_info *map = mtd->priv; | |
1613 | struct cfi_private *cfi = map->fldrv_priv; | |
1614 | int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; | |
1615 | int ret = 0; | |
1616 | int chipnum; | |
e102d54a NP |
1617 | unsigned long ofs, vec_seek, i; |
1618 | size_t len = 0; | |
1619 | ||
1620 | for (i = 0; i < count; i++) | |
1621 | len += vecs[i].iov_len; | |
1da177e4 LT |
1622 | |
1623 | *retlen = 0; | |
1624 | if (!len) | |
1625 | return 0; | |
1626 | ||
1627 | chipnum = to >> cfi->chipshift; | |
e102d54a NP |
1628 | ofs = to - (chipnum << cfi->chipshift); |
1629 | vec_seek = 0; | |
1da177e4 | 1630 | |
e102d54a | 1631 | do { |
1da177e4 LT |
1632 | /* We must not cross write block boundaries */ |
1633 | int size = wbufsize - (ofs & (wbufsize-1)); | |
1634 | ||
1635 | if (size > len) | |
1636 | size = len; | |
1f948b43 | 1637 | ret = do_write_buffer(map, &cfi->chips[chipnum], |
e102d54a | 1638 | ofs, &vecs, &vec_seek, size); |
1da177e4 LT |
1639 | if (ret) |
1640 | return ret; | |
1641 | ||
1642 | ofs += size; | |
1da177e4 LT |
1643 | (*retlen) += size; |
1644 | len -= size; | |
1645 | ||
1646 | if (ofs >> cfi->chipshift) { | |
1f948b43 | 1647 | chipnum ++; |
1da177e4 LT |
1648 | ofs = 0; |
1649 | if (chipnum == cfi->numchips) | |
1650 | return 0; | |
1651 | } | |
df54b52c JB |
1652 | |
1653 | /* Be nice and reschedule with the chip in a usable state for other | |
1654 | processes. */ | |
1655 | cond_resched(); | |
1656 | ||
e102d54a NP |
1657 | } while (len); |
1658 | ||
1da177e4 LT |
1659 | return 0; |
1660 | } | |
1661 | ||
e102d54a NP |
1662 | static int cfi_intelext_write_buffers (struct mtd_info *mtd, loff_t to, |
1663 | size_t len, size_t *retlen, const u_char *buf) | |
1664 | { | |
1665 | struct kvec vec; | |
1666 | ||
1667 | vec.iov_base = (void *) buf; | |
1668 | vec.iov_len = len; | |
1669 | ||
1670 | return cfi_intelext_writev(mtd, &vec, 1, to, retlen); | |
1671 | } | |
1672 | ||
1da177e4 LT |
1673 | static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, |
1674 | unsigned long adr, int len, void *thunk) | |
1675 | { | |
1676 | struct cfi_private *cfi = map->fldrv_priv; | |
c172471b | 1677 | map_word status; |
1da177e4 | 1678 | int retries = 3; |
c172471b | 1679 | int ret; |
1da177e4 LT |
1680 | |
1681 | adr += chip->start; | |
1682 | ||
1da177e4 LT |
1683 | retry: |
1684 | spin_lock(chip->mutex); | |
1685 | ret = get_chip(map, chip, adr, FL_ERASING); | |
1686 | if (ret) { | |
1687 | spin_unlock(chip->mutex); | |
1688 | return ret; | |
1689 | } | |
1690 | ||
1691 | XIP_INVAL_CACHED_RANGE(map, adr, len); | |
1692 | ENABLE_VPP(map); | |
1693 | xip_disable(map, chip, adr); | |
1694 | ||
1695 | /* Clear the status register first */ | |
1696 | map_write(map, CMD(0x50), adr); | |
1697 | ||
1698 | /* Now erase */ | |
1699 | map_write(map, CMD(0x20), adr); | |
1700 | map_write(map, CMD(0xD0), adr); | |
1701 | chip->state = FL_ERASING; | |
1702 | chip->erase_suspended = 0; | |
1703 | ||
c172471b NP |
1704 | ret = INVAL_CACHE_AND_WAIT(map, chip, adr, |
1705 | adr, len, | |
1706 | &chip->erase_time); | |
1707 | if (ret) { | |
1708 | map_write(map, CMD(0x70), adr); | |
1709 | chip->state = FL_STATUS; | |
1710 | xip_enable(map, chip, adr); | |
1711 | printk(KERN_ERR "%s: block erase error: (status timeout)\n", map->name); | |
1712 | goto out; | |
1da177e4 LT |
1713 | } |
1714 | ||
1715 | /* We've broken this before. It doesn't hurt to be safe */ | |
1716 | map_write(map, CMD(0x70), adr); | |
1717 | chip->state = FL_STATUS; | |
1718 | status = map_read(map, adr); | |
1719 | ||
4843653c | 1720 | /* check for errors */ |
1da177e4 | 1721 | if (map_word_bitsset(map, status, CMD(0x3a))) { |
4843653c | 1722 | unsigned long chipstatus = MERGESTATUS(status); |
1da177e4 LT |
1723 | |
1724 | /* Reset the error bits */ | |
1725 | map_write(map, CMD(0x50), adr); | |
1726 | map_write(map, CMD(0x70), adr); | |
1727 | xip_enable(map, chip, adr); | |
1728 | ||
1da177e4 | 1729 | if ((chipstatus & 0x30) == 0x30) { |
4843653c NP |
1730 | printk(KERN_ERR "%s: block erase error: (bad command sequence, status 0x%lx)\n", map->name, chipstatus); |
1731 | ret = -EINVAL; | |
1da177e4 LT |
1732 | } else if (chipstatus & 0x02) { |
1733 | /* Protection bit set */ | |
1734 | ret = -EROFS; | |
1735 | } else if (chipstatus & 0x8) { | |
1736 | /* Voltage */ | |
4843653c | 1737 | printk(KERN_ERR "%s: block erase error: (bad VPP)\n", map->name); |
1da177e4 | 1738 | ret = -EIO; |
4843653c NP |
1739 | } else if (chipstatus & 0x20 && retries--) { |
1740 | printk(KERN_DEBUG "block erase failed at 0x%08lx: status 0x%lx. Retrying...\n", adr, chipstatus); | |
4843653c NP |
1741 | put_chip(map, chip, adr); |
1742 | spin_unlock(chip->mutex); | |
1743 | goto retry; | |
1744 | } else { | |
1745 | printk(KERN_ERR "%s: block erase failed at 0x%08lx (status 0x%lx)\n", map->name, adr, chipstatus); | |
1da177e4 LT |
1746 | ret = -EIO; |
1747 | } | |
4843653c NP |
1748 | |
1749 | goto out; | |
1da177e4 LT |
1750 | } |
1751 | ||
4843653c | 1752 | xip_enable(map, chip, adr); |
1da177e4 LT |
1753 | out: put_chip(map, chip, adr); |
1754 | spin_unlock(chip->mutex); | |
1755 | return ret; | |
1756 | } | |
1757 | ||
1758 | int cfi_intelext_erase_varsize(struct mtd_info *mtd, struct erase_info *instr) | |
1759 | { | |
1760 | unsigned long ofs, len; | |
1761 | int ret; | |
1762 | ||
1763 | ofs = instr->addr; | |
1764 | len = instr->len; | |
1765 | ||
1766 | ret = cfi_varsize_frob(mtd, do_erase_oneblock, ofs, len, NULL); | |
1767 | if (ret) | |
1768 | return ret; | |
1769 | ||
1770 | instr->state = MTD_ERASE_DONE; | |
1771 | mtd_erase_callback(instr); | |
1f948b43 | 1772 | |
1da177e4 LT |
1773 | return 0; |
1774 | } | |
1775 | ||
1776 | static void cfi_intelext_sync (struct mtd_info *mtd) | |
1777 | { | |
1778 | struct map_info *map = mtd->priv; | |
1779 | struct cfi_private *cfi = map->fldrv_priv; | |
1780 | int i; | |
1781 | struct flchip *chip; | |
1782 | int ret = 0; | |
1783 | ||
1784 | for (i=0; !ret && i<cfi->numchips; i++) { | |
1785 | chip = &cfi->chips[i]; | |
1786 | ||
1787 | spin_lock(chip->mutex); | |
1788 | ret = get_chip(map, chip, chip->start, FL_SYNCING); | |
1789 | ||
1790 | if (!ret) { | |
1791 | chip->oldstate = chip->state; | |
1792 | chip->state = FL_SYNCING; | |
1f948b43 | 1793 | /* No need to wake_up() on this state change - |
1da177e4 LT |
1794 | * as the whole point is that nobody can do anything |
1795 | * with the chip now anyway. | |
1796 | */ | |
1797 | } | |
1798 | spin_unlock(chip->mutex); | |
1799 | } | |
1800 | ||
1801 | /* Unlock the chips again */ | |
1802 | ||
1803 | for (i--; i >=0; i--) { | |
1804 | chip = &cfi->chips[i]; | |
1805 | ||
1806 | spin_lock(chip->mutex); | |
1f948b43 | 1807 | |
1da177e4 LT |
1808 | if (chip->state == FL_SYNCING) { |
1809 | chip->state = chip->oldstate; | |
09c79335 | 1810 | chip->oldstate = FL_READY; |
1da177e4 LT |
1811 | wake_up(&chip->wq); |
1812 | } | |
1813 | spin_unlock(chip->mutex); | |
1814 | } | |
1815 | } | |
1816 | ||
1817 | #ifdef DEBUG_LOCK_BITS | |
1818 | static int __xipram do_printlockstatus_oneblock(struct map_info *map, | |
1819 | struct flchip *chip, | |
1820 | unsigned long adr, | |
1821 | int len, void *thunk) | |
1822 | { | |
1823 | struct cfi_private *cfi = map->fldrv_priv; | |
1824 | int status, ofs_factor = cfi->interleave * cfi->device_type; | |
1825 | ||
c25bb1f5 | 1826 | adr += chip->start; |
1da177e4 | 1827 | xip_disable(map, chip, adr+(2*ofs_factor)); |
c25bb1f5 | 1828 | map_write(map, CMD(0x90), adr+(2*ofs_factor)); |
1da177e4 LT |
1829 | chip->state = FL_JEDEC_QUERY; |
1830 | status = cfi_read_query(map, adr+(2*ofs_factor)); | |
1831 | xip_enable(map, chip, 0); | |
1832 | printk(KERN_DEBUG "block status register for 0x%08lx is %x\n", | |
1833 | adr, status); | |
1834 | return 0; | |
1835 | } | |
1836 | #endif | |
1837 | ||
1838 | #define DO_XXLOCK_ONEBLOCK_LOCK ((void *) 1) | |
1839 | #define DO_XXLOCK_ONEBLOCK_UNLOCK ((void *) 2) | |
1840 | ||
1841 | static int __xipram do_xxlock_oneblock(struct map_info *map, struct flchip *chip, | |
1842 | unsigned long adr, int len, void *thunk) | |
1843 | { | |
1844 | struct cfi_private *cfi = map->fldrv_priv; | |
9a6e73ec | 1845 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
c172471b | 1846 | int udelay; |
1da177e4 LT |
1847 | int ret; |
1848 | ||
1849 | adr += chip->start; | |
1850 | ||
1da177e4 LT |
1851 | spin_lock(chip->mutex); |
1852 | ret = get_chip(map, chip, adr, FL_LOCKING); | |
1853 | if (ret) { | |
1854 | spin_unlock(chip->mutex); | |
1855 | return ret; | |
1856 | } | |
1857 | ||
1858 | ENABLE_VPP(map); | |
1859 | xip_disable(map, chip, adr); | |
1f948b43 | 1860 | |
1da177e4 LT |
1861 | map_write(map, CMD(0x60), adr); |
1862 | if (thunk == DO_XXLOCK_ONEBLOCK_LOCK) { | |
1863 | map_write(map, CMD(0x01), adr); | |
1864 | chip->state = FL_LOCKING; | |
1865 | } else if (thunk == DO_XXLOCK_ONEBLOCK_UNLOCK) { | |
1866 | map_write(map, CMD(0xD0), adr); | |
1867 | chip->state = FL_UNLOCKING; | |
1868 | } else | |
1869 | BUG(); | |
1870 | ||
9a6e73ec TP |
1871 | /* |
1872 | * If Instant Individual Block Locking supported then no need | |
1873 | * to delay. | |
1874 | */ | |
c172471b | 1875 | udelay = (!extp || !(extp->FeatureSupport & (1 << 5))) ? 1000000/HZ : 0; |
9a6e73ec | 1876 | |
c172471b NP |
1877 | ret = WAIT_TIMEOUT(map, chip, adr, udelay); |
1878 | if (ret) { | |
1879 | map_write(map, CMD(0x70), adr); | |
1880 | chip->state = FL_STATUS; | |
1881 | xip_enable(map, chip, adr); | |
1882 | printk(KERN_ERR "%s: block unlock error: (status timeout)\n", map->name); | |
1883 | goto out; | |
1da177e4 | 1884 | } |
1f948b43 | 1885 | |
1da177e4 | 1886 | xip_enable(map, chip, adr); |
c172471b | 1887 | out: put_chip(map, chip, adr); |
1da177e4 | 1888 | spin_unlock(chip->mutex); |
c172471b | 1889 | return ret; |
1da177e4 LT |
1890 | } |
1891 | ||
1892 | static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, size_t len) | |
1893 | { | |
1894 | int ret; | |
1895 | ||
1896 | #ifdef DEBUG_LOCK_BITS | |
1897 | printk(KERN_DEBUG "%s: lock status before, ofs=0x%08llx, len=0x%08X\n", | |
1898 | __FUNCTION__, ofs, len); | |
1899 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, | |
1900 | ofs, len, 0); | |
1901 | #endif | |
1902 | ||
1f948b43 | 1903 | ret = cfi_varsize_frob(mtd, do_xxlock_oneblock, |
1da177e4 | 1904 | ofs, len, DO_XXLOCK_ONEBLOCK_LOCK); |
1f948b43 | 1905 | |
1da177e4 LT |
1906 | #ifdef DEBUG_LOCK_BITS |
1907 | printk(KERN_DEBUG "%s: lock status after, ret=%d\n", | |
1908 | __FUNCTION__, ret); | |
1909 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, | |
1910 | ofs, len, 0); | |
1911 | #endif | |
1912 | ||
1913 | return ret; | |
1914 | } | |
1915 | ||
1916 | static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, size_t len) | |
1917 | { | |
1918 | int ret; | |
1919 | ||
1920 | #ifdef DEBUG_LOCK_BITS | |
1921 | printk(KERN_DEBUG "%s: lock status before, ofs=0x%08llx, len=0x%08X\n", | |
1922 | __FUNCTION__, ofs, len); | |
1923 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, | |
1924 | ofs, len, 0); | |
1925 | #endif | |
1926 | ||
1927 | ret = cfi_varsize_frob(mtd, do_xxlock_oneblock, | |
1928 | ofs, len, DO_XXLOCK_ONEBLOCK_UNLOCK); | |
1f948b43 | 1929 | |
1da177e4 LT |
1930 | #ifdef DEBUG_LOCK_BITS |
1931 | printk(KERN_DEBUG "%s: lock status after, ret=%d\n", | |
1932 | __FUNCTION__, ret); | |
1f948b43 | 1933 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, |
1da177e4 LT |
1934 | ofs, len, 0); |
1935 | #endif | |
1f948b43 | 1936 | |
1da177e4 LT |
1937 | return ret; |
1938 | } | |
1939 | ||
f77814dd NP |
1940 | #ifdef CONFIG_MTD_OTP |
1941 | ||
1f948b43 | 1942 | typedef int (*otp_op_t)(struct map_info *map, struct flchip *chip, |
f77814dd NP |
1943 | u_long data_offset, u_char *buf, u_int size, |
1944 | u_long prot_offset, u_int groupno, u_int groupsize); | |
1945 | ||
1946 | static int __xipram | |
1947 | do_otp_read(struct map_info *map, struct flchip *chip, u_long offset, | |
1948 | u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) | |
1949 | { | |
1950 | struct cfi_private *cfi = map->fldrv_priv; | |
1951 | int ret; | |
1952 | ||
1953 | spin_lock(chip->mutex); | |
1954 | ret = get_chip(map, chip, chip->start, FL_JEDEC_QUERY); | |
1955 | if (ret) { | |
1956 | spin_unlock(chip->mutex); | |
1957 | return ret; | |
1958 | } | |
1959 | ||
1960 | /* let's ensure we're not reading back cached data from array mode */ | |
6da70124 | 1961 | INVALIDATE_CACHED_RANGE(map, chip->start + offset, size); |
f77814dd NP |
1962 | |
1963 | xip_disable(map, chip, chip->start); | |
1964 | if (chip->state != FL_JEDEC_QUERY) { | |
1965 | map_write(map, CMD(0x90), chip->start); | |
1966 | chip->state = FL_JEDEC_QUERY; | |
1967 | } | |
1968 | map_copy_from(map, buf, chip->start + offset, size); | |
1969 | xip_enable(map, chip, chip->start); | |
1970 | ||
1971 | /* then ensure we don't keep OTP data in the cache */ | |
6da70124 | 1972 | INVALIDATE_CACHED_RANGE(map, chip->start + offset, size); |
f77814dd NP |
1973 | |
1974 | put_chip(map, chip, chip->start); | |
1975 | spin_unlock(chip->mutex); | |
1976 | return 0; | |
1977 | } | |
1978 | ||
1979 | static int | |
1980 | do_otp_write(struct map_info *map, struct flchip *chip, u_long offset, | |
1981 | u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) | |
1982 | { | |
1983 | int ret; | |
1984 | ||
1985 | while (size) { | |
1986 | unsigned long bus_ofs = offset & ~(map_bankwidth(map)-1); | |
1987 | int gap = offset - bus_ofs; | |
1988 | int n = min_t(int, size, map_bankwidth(map)-gap); | |
1989 | map_word datum = map_word_ff(map); | |
1990 | ||
1991 | datum = map_word_load_partial(map, datum, buf, gap, n); | |
1992 | ret = do_write_oneword(map, chip, bus_ofs, datum, FL_OTP_WRITE); | |
1f948b43 | 1993 | if (ret) |
f77814dd NP |
1994 | return ret; |
1995 | ||
1996 | offset += n; | |
1997 | buf += n; | |
1998 | size -= n; | |
1999 | } | |
2000 | ||
2001 | return 0; | |
2002 | } | |
2003 | ||
2004 | static int | |
2005 | do_otp_lock(struct map_info *map, struct flchip *chip, u_long offset, | |
2006 | u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) | |
2007 | { | |
2008 | struct cfi_private *cfi = map->fldrv_priv; | |
2009 | map_word datum; | |
2010 | ||
2011 | /* make sure area matches group boundaries */ | |
332d71f7 | 2012 | if (size != grpsz) |
f77814dd NP |
2013 | return -EXDEV; |
2014 | ||
2015 | datum = map_word_ff(map); | |
2016 | datum = map_word_clr(map, datum, CMD(1 << grpno)); | |
2017 | return do_write_oneword(map, chip, prot, datum, FL_OTP_WRITE); | |
2018 | } | |
2019 | ||
2020 | static int cfi_intelext_otp_walk(struct mtd_info *mtd, loff_t from, size_t len, | |
2021 | size_t *retlen, u_char *buf, | |
2022 | otp_op_t action, int user_regs) | |
2023 | { | |
2024 | struct map_info *map = mtd->priv; | |
2025 | struct cfi_private *cfi = map->fldrv_priv; | |
2026 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; | |
2027 | struct flchip *chip; | |
2028 | struct cfi_intelext_otpinfo *otp; | |
2029 | u_long devsize, reg_prot_offset, data_offset; | |
2030 | u_int chip_num, chip_step, field, reg_fact_size, reg_user_size; | |
2031 | u_int groups, groupno, groupsize, reg_fact_groups, reg_user_groups; | |
2032 | int ret; | |
2033 | ||
2034 | *retlen = 0; | |
2035 | ||
2036 | /* Check that we actually have some OTP registers */ | |
2037 | if (!extp || !(extp->FeatureSupport & 64) || !extp->NumProtectionFields) | |
2038 | return -ENODATA; | |
2039 | ||
2040 | /* we need real chips here not virtual ones */ | |
2041 | devsize = (1 << cfi->cfiq->DevSize) * cfi->interleave; | |
2042 | chip_step = devsize >> cfi->chipshift; | |
dce2b4da NP |
2043 | chip_num = 0; |
2044 | ||
2045 | /* Some chips have OTP located in the _top_ partition only. | |
2046 | For example: Intel 28F256L18T (T means top-parameter device) */ | |
2047 | if (cfi->mfr == MANUFACTURER_INTEL) { | |
2048 | switch (cfi->id) { | |
2049 | case 0x880b: | |
2050 | case 0x880c: | |
2051 | case 0x880d: | |
2052 | chip_num = chip_step - 1; | |
2053 | } | |
2054 | } | |
f77814dd | 2055 | |
dce2b4da | 2056 | for ( ; chip_num < cfi->numchips; chip_num += chip_step) { |
f77814dd NP |
2057 | chip = &cfi->chips[chip_num]; |
2058 | otp = (struct cfi_intelext_otpinfo *)&extp->extra[0]; | |
2059 | ||
2060 | /* first OTP region */ | |
2061 | field = 0; | |
2062 | reg_prot_offset = extp->ProtRegAddr; | |
2063 | reg_fact_groups = 1; | |
2064 | reg_fact_size = 1 << extp->FactProtRegSize; | |
2065 | reg_user_groups = 1; | |
2066 | reg_user_size = 1 << extp->UserProtRegSize; | |
2067 | ||
2068 | while (len > 0) { | |
2069 | /* flash geometry fixup */ | |
2070 | data_offset = reg_prot_offset + 1; | |
2071 | data_offset *= cfi->interleave * cfi->device_type; | |
2072 | reg_prot_offset *= cfi->interleave * cfi->device_type; | |
2073 | reg_fact_size *= cfi->interleave; | |
2074 | reg_user_size *= cfi->interleave; | |
2075 | ||
2076 | if (user_regs) { | |
2077 | groups = reg_user_groups; | |
2078 | groupsize = reg_user_size; | |
2079 | /* skip over factory reg area */ | |
2080 | groupno = reg_fact_groups; | |
2081 | data_offset += reg_fact_groups * reg_fact_size; | |
2082 | } else { | |
2083 | groups = reg_fact_groups; | |
2084 | groupsize = reg_fact_size; | |
2085 | groupno = 0; | |
2086 | } | |
2087 | ||
332d71f7 | 2088 | while (len > 0 && groups > 0) { |
f77814dd NP |
2089 | if (!action) { |
2090 | /* | |
2091 | * Special case: if action is NULL | |
2092 | * we fill buf with otp_info records. | |
2093 | */ | |
2094 | struct otp_info *otpinfo; | |
2095 | map_word lockword; | |
2096 | len -= sizeof(struct otp_info); | |
2097 | if (len <= 0) | |
2098 | return -ENOSPC; | |
2099 | ret = do_otp_read(map, chip, | |
2100 | reg_prot_offset, | |
2101 | (u_char *)&lockword, | |
2102 | map_bankwidth(map), | |
2103 | 0, 0, 0); | |
2104 | if (ret) | |
2105 | return ret; | |
2106 | otpinfo = (struct otp_info *)buf; | |
2107 | otpinfo->start = from; | |
2108 | otpinfo->length = groupsize; | |
2109 | otpinfo->locked = | |
2110 | !map_word_bitsset(map, lockword, | |
2111 | CMD(1 << groupno)); | |
2112 | from += groupsize; | |
2113 | buf += sizeof(*otpinfo); | |
2114 | *retlen += sizeof(*otpinfo); | |
2115 | } else if (from >= groupsize) { | |
2116 | from -= groupsize; | |
332d71f7 | 2117 | data_offset += groupsize; |
f77814dd NP |
2118 | } else { |
2119 | int size = groupsize; | |
2120 | data_offset += from; | |
2121 | size -= from; | |
2122 | from = 0; | |
2123 | if (size > len) | |
2124 | size = len; | |
2125 | ret = action(map, chip, data_offset, | |
2126 | buf, size, reg_prot_offset, | |
2127 | groupno, groupsize); | |
2128 | if (ret < 0) | |
2129 | return ret; | |
2130 | buf += size; | |
2131 | len -= size; | |
2132 | *retlen += size; | |
332d71f7 | 2133 | data_offset += size; |
f77814dd NP |
2134 | } |
2135 | groupno++; | |
2136 | groups--; | |
2137 | } | |
2138 | ||
2139 | /* next OTP region */ | |
2140 | if (++field == extp->NumProtectionFields) | |
2141 | break; | |
2142 | reg_prot_offset = otp->ProtRegAddr; | |
2143 | reg_fact_groups = otp->FactGroups; | |
2144 | reg_fact_size = 1 << otp->FactProtRegSize; | |
2145 | reg_user_groups = otp->UserGroups; | |
2146 | reg_user_size = 1 << otp->UserProtRegSize; | |
2147 | otp++; | |
2148 | } | |
2149 | } | |
2150 | ||
2151 | return 0; | |
2152 | } | |
2153 | ||
2154 | static int cfi_intelext_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, | |
2155 | size_t len, size_t *retlen, | |
2156 | u_char *buf) | |
2157 | { | |
2158 | return cfi_intelext_otp_walk(mtd, from, len, retlen, | |
2159 | buf, do_otp_read, 0); | |
2160 | } | |
2161 | ||
2162 | static int cfi_intelext_read_user_prot_reg(struct mtd_info *mtd, loff_t from, | |
2163 | size_t len, size_t *retlen, | |
2164 | u_char *buf) | |
2165 | { | |
2166 | return cfi_intelext_otp_walk(mtd, from, len, retlen, | |
2167 | buf, do_otp_read, 1); | |
2168 | } | |
2169 | ||
2170 | static int cfi_intelext_write_user_prot_reg(struct mtd_info *mtd, loff_t from, | |
2171 | size_t len, size_t *retlen, | |
2172 | u_char *buf) | |
2173 | { | |
2174 | return cfi_intelext_otp_walk(mtd, from, len, retlen, | |
2175 | buf, do_otp_write, 1); | |
2176 | } | |
2177 | ||
2178 | static int cfi_intelext_lock_user_prot_reg(struct mtd_info *mtd, | |
2179 | loff_t from, size_t len) | |
2180 | { | |
2181 | size_t retlen; | |
2182 | return cfi_intelext_otp_walk(mtd, from, len, &retlen, | |
2183 | NULL, do_otp_lock, 1); | |
2184 | } | |
2185 | ||
1f948b43 | 2186 | static int cfi_intelext_get_fact_prot_info(struct mtd_info *mtd, |
f77814dd NP |
2187 | struct otp_info *buf, size_t len) |
2188 | { | |
2189 | size_t retlen; | |
2190 | int ret; | |
2191 | ||
2192 | ret = cfi_intelext_otp_walk(mtd, 0, len, &retlen, (u_char *)buf, NULL, 0); | |
2193 | return ret ? : retlen; | |
2194 | } | |
2195 | ||
2196 | static int cfi_intelext_get_user_prot_info(struct mtd_info *mtd, | |
2197 | struct otp_info *buf, size_t len) | |
2198 | { | |
2199 | size_t retlen; | |
2200 | int ret; | |
2201 | ||
2202 | ret = cfi_intelext_otp_walk(mtd, 0, len, &retlen, (u_char *)buf, NULL, 1); | |
2203 | return ret ? : retlen; | |
2204 | } | |
2205 | ||
2206 | #endif | |
2207 | ||
1da177e4 LT |
2208 | static int cfi_intelext_suspend(struct mtd_info *mtd) |
2209 | { | |
2210 | struct map_info *map = mtd->priv; | |
2211 | struct cfi_private *cfi = map->fldrv_priv; | |
2212 | int i; | |
2213 | struct flchip *chip; | |
2214 | int ret = 0; | |
2215 | ||
2216 | for (i=0; !ret && i<cfi->numchips; i++) { | |
2217 | chip = &cfi->chips[i]; | |
2218 | ||
2219 | spin_lock(chip->mutex); | |
2220 | ||
2221 | switch (chip->state) { | |
2222 | case FL_READY: | |
2223 | case FL_STATUS: | |
2224 | case FL_CFI_QUERY: | |
2225 | case FL_JEDEC_QUERY: | |
2226 | if (chip->oldstate == FL_READY) { | |
2227 | chip->oldstate = chip->state; | |
2228 | chip->state = FL_PM_SUSPENDED; | |
1f948b43 | 2229 | /* No need to wake_up() on this state change - |
1da177e4 LT |
2230 | * as the whole point is that nobody can do anything |
2231 | * with the chip now anyway. | |
2232 | */ | |
2233 | } else { | |
2234 | /* There seems to be an operation pending. We must wait for it. */ | |
2235 | printk(KERN_NOTICE "Flash device refused suspend due to pending operation (oldstate %d)\n", chip->oldstate); | |
2236 | ret = -EAGAIN; | |
2237 | } | |
2238 | break; | |
2239 | default: | |
2240 | /* Should we actually wait? Once upon a time these routines weren't | |
2241 | allowed to. Or should we return -EAGAIN, because the upper layers | |
2242 | ought to have already shut down anything which was using the device | |
2243 | anyway? The latter for now. */ | |
2244 | printk(KERN_NOTICE "Flash device refused suspend due to active operation (state %d)\n", chip->oldstate); | |
2245 | ret = -EAGAIN; | |
2246 | case FL_PM_SUSPENDED: | |
2247 | break; | |
2248 | } | |
2249 | spin_unlock(chip->mutex); | |
2250 | } | |
2251 | ||
2252 | /* Unlock the chips again */ | |
2253 | ||
2254 | if (ret) { | |
2255 | for (i--; i >=0; i--) { | |
2256 | chip = &cfi->chips[i]; | |
1f948b43 | 2257 | |
1da177e4 | 2258 | spin_lock(chip->mutex); |
1f948b43 | 2259 | |
1da177e4 LT |
2260 | if (chip->state == FL_PM_SUSPENDED) { |
2261 | /* No need to force it into a known state here, | |
2262 | because we're returning failure, and it didn't | |
2263 | get power cycled */ | |
2264 | chip->state = chip->oldstate; | |
2265 | chip->oldstate = FL_READY; | |
2266 | wake_up(&chip->wq); | |
2267 | } | |
2268 | spin_unlock(chip->mutex); | |
2269 | } | |
1f948b43 TG |
2270 | } |
2271 | ||
1da177e4 LT |
2272 | return ret; |
2273 | } | |
2274 | ||
2275 | static void cfi_intelext_resume(struct mtd_info *mtd) | |
2276 | { | |
2277 | struct map_info *map = mtd->priv; | |
2278 | struct cfi_private *cfi = map->fldrv_priv; | |
2279 | int i; | |
2280 | struct flchip *chip; | |
2281 | ||
2282 | for (i=0; i<cfi->numchips; i++) { | |
1f948b43 | 2283 | |
1da177e4 LT |
2284 | chip = &cfi->chips[i]; |
2285 | ||
2286 | spin_lock(chip->mutex); | |
1f948b43 | 2287 | |
1da177e4 LT |
2288 | /* Go to known state. Chip may have been power cycled */ |
2289 | if (chip->state == FL_PM_SUSPENDED) { | |
2290 | map_write(map, CMD(0xFF), cfi->chips[i].start); | |
2291 | chip->oldstate = chip->state = FL_READY; | |
2292 | wake_up(&chip->wq); | |
2293 | } | |
2294 | ||
2295 | spin_unlock(chip->mutex); | |
2296 | } | |
2297 | } | |
2298 | ||
963a6fb0 NP |
2299 | static int cfi_intelext_reset(struct mtd_info *mtd) |
2300 | { | |
2301 | struct map_info *map = mtd->priv; | |
2302 | struct cfi_private *cfi = map->fldrv_priv; | |
2303 | int i, ret; | |
2304 | ||
2305 | for (i=0; i < cfi->numchips; i++) { | |
2306 | struct flchip *chip = &cfi->chips[i]; | |
2307 | ||
2308 | /* force the completion of any ongoing operation | |
1f948b43 | 2309 | and switch to array mode so any bootloader in |
963a6fb0 NP |
2310 | flash is accessible for soft reboot. */ |
2311 | spin_lock(chip->mutex); | |
2312 | ret = get_chip(map, chip, chip->start, FL_SYNCING); | |
2313 | if (!ret) { | |
2314 | map_write(map, CMD(0xff), chip->start); | |
2315 | chip->state = FL_READY; | |
2316 | } | |
2317 | spin_unlock(chip->mutex); | |
2318 | } | |
2319 | ||
2320 | return 0; | |
2321 | } | |
2322 | ||
2323 | static int cfi_intelext_reboot(struct notifier_block *nb, unsigned long val, | |
2324 | void *v) | |
2325 | { | |
2326 | struct mtd_info *mtd; | |
2327 | ||
2328 | mtd = container_of(nb, struct mtd_info, reboot_notifier); | |
2329 | cfi_intelext_reset(mtd); | |
2330 | return NOTIFY_DONE; | |
2331 | } | |
2332 | ||
1da177e4 LT |
2333 | static void cfi_intelext_destroy(struct mtd_info *mtd) |
2334 | { | |
2335 | struct map_info *map = mtd->priv; | |
2336 | struct cfi_private *cfi = map->fldrv_priv; | |
963a6fb0 NP |
2337 | cfi_intelext_reset(mtd); |
2338 | unregister_reboot_notifier(&mtd->reboot_notifier); | |
1da177e4 LT |
2339 | kfree(cfi->cmdset_priv); |
2340 | kfree(cfi->cfiq); | |
2341 | kfree(cfi->chips[0].priv); | |
2342 | kfree(cfi); | |
2343 | kfree(mtd->eraseregions); | |
2344 | } | |
2345 | ||
1da177e4 LT |
2346 | MODULE_LICENSE("GPL"); |
2347 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org> et al."); | |
2348 | MODULE_DESCRIPTION("MTD chip driver for Intel/Sharp flash chips"); | |
a15bdeef DW |
2349 | MODULE_ALIAS("cfi_cmdset_0003"); |
2350 | MODULE_ALIAS("cfi_cmdset_0200"); |