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Commit | Line | Data |
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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 | |
0ecbc81a RG |
18 | * 21/03/2007 Rodolfo Giometti <giometti@linux.it> |
19 | * - auto unlock sectors on resume for auto locking flash on power up | |
1da177e4 LT |
20 | */ |
21 | ||
22 | #include <linux/module.h> | |
23 | #include <linux/types.h> | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/sched.h> | |
26 | #include <linux/init.h> | |
27 | #include <asm/io.h> | |
28 | #include <asm/byteorder.h> | |
29 | ||
30 | #include <linux/errno.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/delay.h> | |
33 | #include <linux/interrupt.h> | |
963a6fb0 | 34 | #include <linux/reboot.h> |
0ecbc81a | 35 | #include <linux/bitmap.h> |
1da177e4 LT |
36 | #include <linux/mtd/xip.h> |
37 | #include <linux/mtd/map.h> | |
38 | #include <linux/mtd/mtd.h> | |
39 | #include <linux/mtd/compatmac.h> | |
40 | #include <linux/mtd/cfi.h> | |
41 | ||
42 | /* #define CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE */ | |
43 | /* #define CMDSET0001_DISABLE_WRITE_SUSPEND */ | |
44 | ||
45 | // debugging, turns off buffer write mode if set to 1 | |
46 | #define FORCE_WORD_WRITE 0 | |
47 | ||
48 | #define MANUFACTURER_INTEL 0x0089 | |
49 | #define I82802AB 0x00ad | |
50 | #define I82802AC 0x00ac | |
51 | #define MANUFACTURER_ST 0x0020 | |
52 | #define M50LPW080 0x002F | |
53 | ||
54 | static int cfi_intelext_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); | |
1da177e4 LT |
55 | static int cfi_intelext_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); |
56 | static int cfi_intelext_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); | |
e102d54a | 57 | static int cfi_intelext_writev(struct mtd_info *, const struct kvec *, unsigned long, loff_t, size_t *); |
1da177e4 LT |
58 | static int cfi_intelext_erase_varsize(struct mtd_info *, struct erase_info *); |
59 | static void cfi_intelext_sync (struct mtd_info *); | |
60 | static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, size_t len); | |
61 | static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, size_t len); | |
8048d2fc | 62 | #ifdef CONFIG_MTD_OTP |
f77814dd NP |
63 | static int cfi_intelext_read_fact_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *); |
64 | static int cfi_intelext_read_user_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *); | |
65 | static int cfi_intelext_write_user_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *); | |
66 | static int cfi_intelext_lock_user_prot_reg (struct mtd_info *, loff_t, size_t); | |
67 | static int cfi_intelext_get_fact_prot_info (struct mtd_info *, | |
68 | struct otp_info *, size_t); | |
69 | static int cfi_intelext_get_user_prot_info (struct mtd_info *, | |
70 | struct otp_info *, size_t); | |
8048d2fc | 71 | #endif |
1da177e4 LT |
72 | static int cfi_intelext_suspend (struct mtd_info *); |
73 | static void cfi_intelext_resume (struct mtd_info *); | |
963a6fb0 | 74 | static int cfi_intelext_reboot (struct notifier_block *, unsigned long, void *); |
1da177e4 LT |
75 | |
76 | static void cfi_intelext_destroy(struct mtd_info *); | |
77 | ||
78 | struct mtd_info *cfi_cmdset_0001(struct map_info *, int); | |
79 | ||
80 | static struct mtd_info *cfi_intelext_setup (struct mtd_info *); | |
81 | static int cfi_intelext_partition_fixup(struct mtd_info *, struct cfi_private **); | |
82 | ||
83 | static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, | |
84 | size_t *retlen, u_char **mtdbuf); | |
85 | static void cfi_intelext_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, | |
86 | size_t len); | |
87 | ||
5a37cf19 | 88 | static int chip_ready (struct map_info *map, struct flchip *chip, unsigned long adr, int mode); |
1da177e4 LT |
89 | static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode); |
90 | static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr); | |
91 | #include "fwh_lock.h" | |
92 | ||
93 | ||
94 | ||
95 | /* | |
96 | * *********** SETUP AND PROBE BITS *********** | |
97 | */ | |
98 | ||
99 | static struct mtd_chip_driver cfi_intelext_chipdrv = { | |
100 | .probe = NULL, /* Not usable directly */ | |
101 | .destroy = cfi_intelext_destroy, | |
102 | .name = "cfi_cmdset_0001", | |
103 | .module = THIS_MODULE | |
104 | }; | |
105 | ||
106 | /* #define DEBUG_LOCK_BITS */ | |
107 | /* #define DEBUG_CFI_FEATURES */ | |
108 | ||
109 | #ifdef DEBUG_CFI_FEATURES | |
110 | static void cfi_tell_features(struct cfi_pri_intelext *extp) | |
111 | { | |
112 | int i; | |
638d9838 | 113 | printk(" Extended Query version %c.%c\n", extp->MajorVersion, extp->MinorVersion); |
1da177e4 LT |
114 | printk(" Feature/Command Support: %4.4X\n", extp->FeatureSupport); |
115 | printk(" - Chip Erase: %s\n", extp->FeatureSupport&1?"supported":"unsupported"); | |
116 | printk(" - Suspend Erase: %s\n", extp->FeatureSupport&2?"supported":"unsupported"); | |
117 | printk(" - Suspend Program: %s\n", extp->FeatureSupport&4?"supported":"unsupported"); | |
118 | printk(" - Legacy Lock/Unlock: %s\n", extp->FeatureSupport&8?"supported":"unsupported"); | |
119 | printk(" - Queued Erase: %s\n", extp->FeatureSupport&16?"supported":"unsupported"); | |
120 | printk(" - Instant block lock: %s\n", extp->FeatureSupport&32?"supported":"unsupported"); | |
121 | printk(" - Protection Bits: %s\n", extp->FeatureSupport&64?"supported":"unsupported"); | |
122 | printk(" - Page-mode read: %s\n", extp->FeatureSupport&128?"supported":"unsupported"); | |
123 | printk(" - Synchronous read: %s\n", extp->FeatureSupport&256?"supported":"unsupported"); | |
124 | printk(" - Simultaneous operations: %s\n", extp->FeatureSupport&512?"supported":"unsupported"); | |
638d9838 NP |
125 | printk(" - Extended Flash Array: %s\n", extp->FeatureSupport&1024?"supported":"unsupported"); |
126 | for (i=11; i<32; i++) { | |
1f948b43 | 127 | if (extp->FeatureSupport & (1<<i)) |
1da177e4 LT |
128 | printk(" - Unknown Bit %X: supported\n", i); |
129 | } | |
1f948b43 | 130 | |
1da177e4 LT |
131 | printk(" Supported functions after Suspend: %2.2X\n", extp->SuspendCmdSupport); |
132 | printk(" - Program after Erase Suspend: %s\n", extp->SuspendCmdSupport&1?"supported":"unsupported"); | |
133 | for (i=1; i<8; i++) { | |
134 | if (extp->SuspendCmdSupport & (1<<i)) | |
135 | printk(" - Unknown Bit %X: supported\n", i); | |
136 | } | |
1f948b43 | 137 | |
1da177e4 LT |
138 | printk(" Block Status Register Mask: %4.4X\n", extp->BlkStatusRegMask); |
139 | printk(" - Lock Bit Active: %s\n", extp->BlkStatusRegMask&1?"yes":"no"); | |
638d9838 NP |
140 | printk(" - Lock-Down Bit Active: %s\n", extp->BlkStatusRegMask&2?"yes":"no"); |
141 | for (i=2; i<3; i++) { | |
1da177e4 LT |
142 | if (extp->BlkStatusRegMask & (1<<i)) |
143 | printk(" - Unknown Bit %X Active: yes\n",i); | |
144 | } | |
638d9838 NP |
145 | printk(" - EFA Lock Bit: %s\n", extp->BlkStatusRegMask&16?"yes":"no"); |
146 | printk(" - EFA Lock-Down Bit: %s\n", extp->BlkStatusRegMask&32?"yes":"no"); | |
147 | for (i=6; i<16; i++) { | |
148 | if (extp->BlkStatusRegMask & (1<<i)) | |
149 | printk(" - Unknown Bit %X Active: yes\n",i); | |
150 | } | |
151 | ||
1f948b43 | 152 | printk(" Vcc Logic Supply Optimum Program/Erase Voltage: %d.%d V\n", |
1da177e4 LT |
153 | extp->VccOptimal >> 4, extp->VccOptimal & 0xf); |
154 | if (extp->VppOptimal) | |
1f948b43 | 155 | printk(" Vpp Programming Supply Optimum Program/Erase Voltage: %d.%d V\n", |
1da177e4 LT |
156 | extp->VppOptimal >> 4, extp->VppOptimal & 0xf); |
157 | } | |
158 | #endif | |
159 | ||
160 | #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE | |
1f948b43 | 161 | /* Some Intel Strata Flash prior to FPO revision C has bugs in this area */ |
1da177e4 LT |
162 | static void fixup_intel_strataflash(struct mtd_info *mtd, void* param) |
163 | { | |
164 | struct map_info *map = mtd->priv; | |
165 | struct cfi_private *cfi = map->fldrv_priv; | |
166 | struct cfi_pri_amdstd *extp = cfi->cmdset_priv; | |
167 | ||
168 | printk(KERN_WARNING "cfi_cmdset_0001: Suspend " | |
169 | "erase on write disabled.\n"); | |
170 | extp->SuspendCmdSupport &= ~1; | |
171 | } | |
172 | #endif | |
173 | ||
174 | #ifdef CMDSET0001_DISABLE_WRITE_SUSPEND | |
175 | static void fixup_no_write_suspend(struct mtd_info *mtd, void* param) | |
176 | { | |
177 | struct map_info *map = mtd->priv; | |
178 | struct cfi_private *cfi = map->fldrv_priv; | |
179 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; | |
180 | ||
181 | if (cfip && (cfip->FeatureSupport&4)) { | |
182 | cfip->FeatureSupport &= ~4; | |
183 | printk(KERN_WARNING "cfi_cmdset_0001: write suspend disabled\n"); | |
184 | } | |
185 | } | |
186 | #endif | |
187 | ||
188 | static void fixup_st_m28w320ct(struct mtd_info *mtd, void* param) | |
189 | { | |
190 | struct map_info *map = mtd->priv; | |
191 | struct cfi_private *cfi = map->fldrv_priv; | |
1f948b43 | 192 | |
1da177e4 LT |
193 | cfi->cfiq->BufWriteTimeoutTyp = 0; /* Not supported */ |
194 | cfi->cfiq->BufWriteTimeoutMax = 0; /* Not supported */ | |
195 | } | |
196 | ||
197 | static void fixup_st_m28w320cb(struct mtd_info *mtd, void* param) | |
198 | { | |
199 | struct map_info *map = mtd->priv; | |
200 | struct cfi_private *cfi = map->fldrv_priv; | |
1f948b43 | 201 | |
1da177e4 LT |
202 | /* Note this is done after the region info is endian swapped */ |
203 | cfi->cfiq->EraseRegionInfo[1] = | |
204 | (cfi->cfiq->EraseRegionInfo[1] & 0xffff0000) | 0x3e; | |
205 | }; | |
206 | ||
207 | static void fixup_use_point(struct mtd_info *mtd, void *param) | |
208 | { | |
209 | struct map_info *map = mtd->priv; | |
210 | if (!mtd->point && map_is_linear(map)) { | |
211 | mtd->point = cfi_intelext_point; | |
212 | mtd->unpoint = cfi_intelext_unpoint; | |
213 | } | |
214 | } | |
215 | ||
216 | static void fixup_use_write_buffers(struct mtd_info *mtd, void *param) | |
217 | { | |
218 | struct map_info *map = mtd->priv; | |
219 | struct cfi_private *cfi = map->fldrv_priv; | |
220 | if (cfi->cfiq->BufWriteTimeoutTyp) { | |
221 | printk(KERN_INFO "Using buffer write method\n" ); | |
222 | mtd->write = cfi_intelext_write_buffers; | |
e102d54a | 223 | mtd->writev = cfi_intelext_writev; |
1da177e4 LT |
224 | } |
225 | } | |
226 | ||
0ecbc81a RG |
227 | /* |
228 | * Some chips power-up with all sectors locked by default. | |
229 | */ | |
230 | static void fixup_use_powerup_lock(struct mtd_info *mtd, void *param) | |
231 | { | |
232 | printk(KERN_INFO "Using auto-unlock on power-up/resume\n" ); | |
233 | mtd->flags |= MTD_STUPID_LOCK; | |
234 | } | |
235 | ||
1da177e4 LT |
236 | static struct cfi_fixup cfi_fixup_table[] = { |
237 | #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE | |
1f948b43 | 238 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_intel_strataflash, NULL }, |
1da177e4 LT |
239 | #endif |
240 | #ifdef CMDSET0001_DISABLE_WRITE_SUSPEND | |
241 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_no_write_suspend, NULL }, | |
242 | #endif | |
243 | #if !FORCE_WORD_WRITE | |
244 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL }, | |
245 | #endif | |
246 | { CFI_MFR_ST, 0x00ba, /* M28W320CT */ fixup_st_m28w320ct, NULL }, | |
247 | { CFI_MFR_ST, 0x00bb, /* M28W320CB */ fixup_st_m28w320cb, NULL }, | |
0ecbc81a | 248 | { MANUFACTURER_INTEL, 0x891c, fixup_use_powerup_lock, NULL, }, |
1da177e4 LT |
249 | { 0, 0, NULL, NULL } |
250 | }; | |
251 | ||
252 | static struct cfi_fixup jedec_fixup_table[] = { | |
253 | { MANUFACTURER_INTEL, I82802AB, fixup_use_fwh_lock, NULL, }, | |
254 | { MANUFACTURER_INTEL, I82802AC, fixup_use_fwh_lock, NULL, }, | |
255 | { MANUFACTURER_ST, M50LPW080, fixup_use_fwh_lock, NULL, }, | |
256 | { 0, 0, NULL, NULL } | |
257 | }; | |
258 | static struct cfi_fixup fixup_table[] = { | |
259 | /* The CFI vendor ids and the JEDEC vendor IDs appear | |
260 | * to be common. It is like the devices id's are as | |
261 | * well. This table is to pick all cases where | |
262 | * we know that is the case. | |
263 | */ | |
264 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_point, NULL }, | |
265 | { 0, 0, NULL, NULL } | |
266 | }; | |
267 | ||
268 | static inline struct cfi_pri_intelext * | |
269 | read_pri_intelext(struct map_info *map, __u16 adr) | |
270 | { | |
271 | struct cfi_pri_intelext *extp; | |
272 | unsigned int extp_size = sizeof(*extp); | |
273 | ||
274 | again: | |
275 | extp = (struct cfi_pri_intelext *)cfi_read_pri(map, adr, extp_size, "Intel/Sharp"); | |
276 | if (!extp) | |
277 | return NULL; | |
278 | ||
d88f977b | 279 | if (extp->MajorVersion != '1' || |
638d9838 | 280 | (extp->MinorVersion < '0' || extp->MinorVersion > '4')) { |
d88f977b TP |
281 | printk(KERN_ERR " Unknown Intel/Sharp Extended Query " |
282 | "version %c.%c.\n", extp->MajorVersion, | |
283 | extp->MinorVersion); | |
284 | kfree(extp); | |
285 | return NULL; | |
286 | } | |
287 | ||
1da177e4 LT |
288 | /* Do some byteswapping if necessary */ |
289 | extp->FeatureSupport = le32_to_cpu(extp->FeatureSupport); | |
290 | extp->BlkStatusRegMask = le16_to_cpu(extp->BlkStatusRegMask); | |
291 | extp->ProtRegAddr = le16_to_cpu(extp->ProtRegAddr); | |
292 | ||
638d9838 | 293 | if (extp->MajorVersion == '1' && extp->MinorVersion >= '3') { |
1da177e4 LT |
294 | unsigned int extra_size = 0; |
295 | int nb_parts, i; | |
296 | ||
297 | /* Protection Register info */ | |
72b56a2d NP |
298 | extra_size += (extp->NumProtectionFields - 1) * |
299 | sizeof(struct cfi_intelext_otpinfo); | |
1da177e4 LT |
300 | |
301 | /* Burst Read info */ | |
6f6ed056 NP |
302 | extra_size += 2; |
303 | if (extp_size < sizeof(*extp) + extra_size) | |
304 | goto need_more; | |
305 | extra_size += extp->extra[extra_size-1]; | |
1da177e4 LT |
306 | |
307 | /* Number of hardware-partitions */ | |
308 | extra_size += 1; | |
309 | if (extp_size < sizeof(*extp) + extra_size) | |
310 | goto need_more; | |
311 | nb_parts = extp->extra[extra_size - 1]; | |
312 | ||
638d9838 NP |
313 | /* skip the sizeof(partregion) field in CFI 1.4 */ |
314 | if (extp->MinorVersion >= '4') | |
315 | extra_size += 2; | |
316 | ||
1da177e4 LT |
317 | for (i = 0; i < nb_parts; i++) { |
318 | struct cfi_intelext_regioninfo *rinfo; | |
319 | rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[extra_size]; | |
320 | extra_size += sizeof(*rinfo); | |
321 | if (extp_size < sizeof(*extp) + extra_size) | |
322 | goto need_more; | |
323 | rinfo->NumIdentPartitions=le16_to_cpu(rinfo->NumIdentPartitions); | |
324 | extra_size += (rinfo->NumBlockTypes - 1) | |
325 | * sizeof(struct cfi_intelext_blockinfo); | |
326 | } | |
327 | ||
638d9838 NP |
328 | if (extp->MinorVersion >= '4') |
329 | extra_size += sizeof(struct cfi_intelext_programming_regioninfo); | |
330 | ||
1da177e4 LT |
331 | if (extp_size < sizeof(*extp) + extra_size) { |
332 | need_more: | |
333 | extp_size = sizeof(*extp) + extra_size; | |
334 | kfree(extp); | |
335 | if (extp_size > 4096) { | |
336 | printk(KERN_ERR | |
337 | "%s: cfi_pri_intelext is too fat\n", | |
338 | __FUNCTION__); | |
339 | return NULL; | |
340 | } | |
341 | goto again; | |
342 | } | |
343 | } | |
1f948b43 | 344 | |
1da177e4 LT |
345 | return extp; |
346 | } | |
347 | ||
1da177e4 LT |
348 | struct mtd_info *cfi_cmdset_0001(struct map_info *map, int primary) |
349 | { | |
350 | struct cfi_private *cfi = map->fldrv_priv; | |
351 | struct mtd_info *mtd; | |
352 | int i; | |
353 | ||
95b93a0c | 354 | mtd = kzalloc(sizeof(*mtd), GFP_KERNEL); |
1da177e4 LT |
355 | if (!mtd) { |
356 | printk(KERN_ERR "Failed to allocate memory for MTD device\n"); | |
357 | return NULL; | |
358 | } | |
1da177e4 LT |
359 | mtd->priv = map; |
360 | mtd->type = MTD_NORFLASH; | |
361 | ||
362 | /* Fill in the default mtd operations */ | |
363 | mtd->erase = cfi_intelext_erase_varsize; | |
364 | mtd->read = cfi_intelext_read; | |
365 | mtd->write = cfi_intelext_write_words; | |
366 | mtd->sync = cfi_intelext_sync; | |
367 | mtd->lock = cfi_intelext_lock; | |
368 | mtd->unlock = cfi_intelext_unlock; | |
369 | mtd->suspend = cfi_intelext_suspend; | |
370 | mtd->resume = cfi_intelext_resume; | |
371 | mtd->flags = MTD_CAP_NORFLASH; | |
372 | mtd->name = map->name; | |
17ffc7ba | 373 | mtd->writesize = 1; |
963a6fb0 NP |
374 | |
375 | mtd->reboot_notifier.notifier_call = cfi_intelext_reboot; | |
376 | ||
1da177e4 | 377 | if (cfi->cfi_mode == CFI_MODE_CFI) { |
1f948b43 | 378 | /* |
1da177e4 LT |
379 | * It's a real CFI chip, not one for which the probe |
380 | * routine faked a CFI structure. So we read the feature | |
381 | * table from it. | |
382 | */ | |
383 | __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR; | |
384 | struct cfi_pri_intelext *extp; | |
385 | ||
386 | extp = read_pri_intelext(map, adr); | |
387 | if (!extp) { | |
388 | kfree(mtd); | |
389 | return NULL; | |
390 | } | |
391 | ||
392 | /* Install our own private info structure */ | |
1f948b43 | 393 | cfi->cmdset_priv = extp; |
1da177e4 LT |
394 | |
395 | cfi_fixup(mtd, cfi_fixup_table); | |
396 | ||
397 | #ifdef DEBUG_CFI_FEATURES | |
398 | /* Tell the user about it in lots of lovely detail */ | |
399 | cfi_tell_features(extp); | |
1f948b43 | 400 | #endif |
1da177e4 LT |
401 | |
402 | if(extp->SuspendCmdSupport & 1) { | |
403 | printk(KERN_NOTICE "cfi_cmdset_0001: Erase suspend on write enabled\n"); | |
404 | } | |
405 | } | |
406 | else if (cfi->cfi_mode == CFI_MODE_JEDEC) { | |
407 | /* Apply jedec specific fixups */ | |
408 | cfi_fixup(mtd, jedec_fixup_table); | |
409 | } | |
410 | /* Apply generic fixups */ | |
411 | cfi_fixup(mtd, fixup_table); | |
412 | ||
413 | for (i=0; i< cfi->numchips; i++) { | |
2a5bd596 DW |
414 | if (cfi->cfiq->WordWriteTimeoutTyp) |
415 | cfi->chips[i].word_write_time = | |
416 | 1<<cfi->cfiq->WordWriteTimeoutTyp; | |
417 | else | |
418 | cfi->chips[i].word_write_time = 50000; | |
419 | ||
420 | if (cfi->cfiq->BufWriteTimeoutTyp) | |
421 | cfi->chips[i].buffer_write_time = | |
422 | 1<<cfi->cfiq->BufWriteTimeoutTyp; | |
423 | /* No default; if it isn't specified, we won't use it */ | |
424 | ||
425 | if (cfi->cfiq->BlockEraseTimeoutTyp) | |
426 | cfi->chips[i].erase_time = | |
427 | 1000<<cfi->cfiq->BlockEraseTimeoutTyp; | |
428 | else | |
429 | cfi->chips[i].erase_time = 2000000; | |
430 | ||
1da177e4 | 431 | cfi->chips[i].ref_point_counter = 0; |
c314b6f1 | 432 | init_waitqueue_head(&(cfi->chips[i].wq)); |
1f948b43 | 433 | } |
1da177e4 LT |
434 | |
435 | map->fldrv = &cfi_intelext_chipdrv; | |
1f948b43 | 436 | |
1da177e4 LT |
437 | return cfi_intelext_setup(mtd); |
438 | } | |
a15bdeef DW |
439 | struct mtd_info *cfi_cmdset_0003(struct map_info *map, int primary) __attribute__((alias("cfi_cmdset_0001"))); |
440 | struct mtd_info *cfi_cmdset_0200(struct map_info *map, int primary) __attribute__((alias("cfi_cmdset_0001"))); | |
441 | EXPORT_SYMBOL_GPL(cfi_cmdset_0001); | |
442 | EXPORT_SYMBOL_GPL(cfi_cmdset_0003); | |
443 | EXPORT_SYMBOL_GPL(cfi_cmdset_0200); | |
1da177e4 LT |
444 | |
445 | static struct mtd_info *cfi_intelext_setup(struct mtd_info *mtd) | |
446 | { | |
447 | struct map_info *map = mtd->priv; | |
448 | struct cfi_private *cfi = map->fldrv_priv; | |
449 | unsigned long offset = 0; | |
450 | int i,j; | |
451 | unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave; | |
452 | ||
453 | //printk(KERN_DEBUG "number of CFI chips: %d\n", cfi->numchips); | |
454 | ||
455 | mtd->size = devsize * cfi->numchips; | |
456 | ||
457 | mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips; | |
1f948b43 | 458 | mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) |
1da177e4 | 459 | * mtd->numeraseregions, GFP_KERNEL); |
1f948b43 | 460 | if (!mtd->eraseregions) { |
1da177e4 LT |
461 | printk(KERN_ERR "Failed to allocate memory for MTD erase region info\n"); |
462 | goto setup_err; | |
463 | } | |
1f948b43 | 464 | |
1da177e4 LT |
465 | for (i=0; i<cfi->cfiq->NumEraseRegions; i++) { |
466 | unsigned long ernum, ersize; | |
467 | ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave; | |
468 | ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1; | |
469 | ||
470 | if (mtd->erasesize < ersize) { | |
471 | mtd->erasesize = ersize; | |
472 | } | |
473 | for (j=0; j<cfi->numchips; j++) { | |
474 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset; | |
475 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize; | |
476 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum; | |
0ecbc81a | 477 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].lockmap = kmalloc(ernum / 8 + 1, GFP_KERNEL); |
1da177e4 LT |
478 | } |
479 | offset += (ersize * ernum); | |
480 | } | |
481 | ||
482 | if (offset != devsize) { | |
483 | /* Argh */ | |
484 | printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize); | |
485 | goto setup_err; | |
486 | } | |
487 | ||
488 | for (i=0; i<mtd->numeraseregions;i++){ | |
4843653c | 489 | printk(KERN_DEBUG "erase region %d: offset=0x%x,size=0x%x,blocks=%d\n", |
1da177e4 LT |
490 | i,mtd->eraseregions[i].offset, |
491 | mtd->eraseregions[i].erasesize, | |
492 | mtd->eraseregions[i].numblocks); | |
493 | } | |
494 | ||
f77814dd | 495 | #ifdef CONFIG_MTD_OTP |
1da177e4 | 496 | mtd->read_fact_prot_reg = cfi_intelext_read_fact_prot_reg; |
f77814dd NP |
497 | mtd->read_user_prot_reg = cfi_intelext_read_user_prot_reg; |
498 | mtd->write_user_prot_reg = cfi_intelext_write_user_prot_reg; | |
499 | mtd->lock_user_prot_reg = cfi_intelext_lock_user_prot_reg; | |
500 | mtd->get_fact_prot_info = cfi_intelext_get_fact_prot_info; | |
501 | mtd->get_user_prot_info = cfi_intelext_get_user_prot_info; | |
1da177e4 LT |
502 | #endif |
503 | ||
504 | /* This function has the potential to distort the reality | |
505 | a bit and therefore should be called last. */ | |
506 | if (cfi_intelext_partition_fixup(mtd, &cfi) != 0) | |
507 | goto setup_err; | |
508 | ||
509 | __module_get(THIS_MODULE); | |
963a6fb0 | 510 | register_reboot_notifier(&mtd->reboot_notifier); |
1da177e4 LT |
511 | return mtd; |
512 | ||
513 | setup_err: | |
514 | if(mtd) { | |
fa671646 | 515 | kfree(mtd->eraseregions); |
1da177e4 LT |
516 | kfree(mtd); |
517 | } | |
518 | kfree(cfi->cmdset_priv); | |
519 | return NULL; | |
520 | } | |
521 | ||
522 | static int cfi_intelext_partition_fixup(struct mtd_info *mtd, | |
523 | struct cfi_private **pcfi) | |
524 | { | |
525 | struct map_info *map = mtd->priv; | |
526 | struct cfi_private *cfi = *pcfi; | |
527 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; | |
528 | ||
529 | /* | |
8f1a866f | 530 | * Probing of multi-partition flash chips. |
1da177e4 LT |
531 | * |
532 | * To support multiple partitions when available, we simply arrange | |
533 | * for each of them to have their own flchip structure even if they | |
534 | * are on the same physical chip. This means completely recreating | |
535 | * a new cfi_private structure right here which is a blatent code | |
536 | * layering violation, but this is still the least intrusive | |
537 | * arrangement at this point. This can be rearranged in the future | |
538 | * if someone feels motivated enough. --nico | |
539 | */ | |
638d9838 | 540 | if (extp && extp->MajorVersion == '1' && extp->MinorVersion >= '3' |
1da177e4 LT |
541 | && extp->FeatureSupport & (1 << 9)) { |
542 | struct cfi_private *newcfi; | |
543 | struct flchip *chip; | |
544 | struct flchip_shared *shared; | |
545 | int offs, numregions, numparts, partshift, numvirtchips, i, j; | |
546 | ||
547 | /* Protection Register info */ | |
72b56a2d NP |
548 | offs = (extp->NumProtectionFields - 1) * |
549 | sizeof(struct cfi_intelext_otpinfo); | |
1da177e4 LT |
550 | |
551 | /* Burst Read info */ | |
6f6ed056 | 552 | offs += extp->extra[offs+1]+2; |
1da177e4 LT |
553 | |
554 | /* Number of partition regions */ | |
555 | numregions = extp->extra[offs]; | |
556 | offs += 1; | |
557 | ||
638d9838 NP |
558 | /* skip the sizeof(partregion) field in CFI 1.4 */ |
559 | if (extp->MinorVersion >= '4') | |
560 | offs += 2; | |
561 | ||
1da177e4 LT |
562 | /* Number of hardware partitions */ |
563 | numparts = 0; | |
564 | for (i = 0; i < numregions; i++) { | |
565 | struct cfi_intelext_regioninfo *rinfo; | |
566 | rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[offs]; | |
567 | numparts += rinfo->NumIdentPartitions; | |
568 | offs += sizeof(*rinfo) | |
569 | + (rinfo->NumBlockTypes - 1) * | |
570 | sizeof(struct cfi_intelext_blockinfo); | |
571 | } | |
572 | ||
638d9838 NP |
573 | /* Programming Region info */ |
574 | if (extp->MinorVersion >= '4') { | |
575 | struct cfi_intelext_programming_regioninfo *prinfo; | |
576 | prinfo = (struct cfi_intelext_programming_regioninfo *)&extp->extra[offs]; | |
28318776 | 577 | mtd->writesize = cfi->interleave << prinfo->ProgRegShift; |
5fa43394 | 578 | mtd->flags &= ~MTD_BIT_WRITEABLE; |
638d9838 | 579 | printk(KERN_DEBUG "%s: program region size/ctrl_valid/ctrl_inval = %d/%d/%d\n", |
28318776 | 580 | map->name, mtd->writesize, |
d4160855 AB |
581 | cfi->interleave * prinfo->ControlValid, |
582 | cfi->interleave * prinfo->ControlInvalid); | |
638d9838 NP |
583 | } |
584 | ||
1da177e4 LT |
585 | /* |
586 | * All functions below currently rely on all chips having | |
587 | * the same geometry so we'll just assume that all hardware | |
588 | * partitions are of the same size too. | |
589 | */ | |
590 | partshift = cfi->chipshift - __ffs(numparts); | |
591 | ||
592 | if ((1 << partshift) < mtd->erasesize) { | |
593 | printk( KERN_ERR | |
594 | "%s: bad number of hw partitions (%d)\n", | |
595 | __FUNCTION__, numparts); | |
596 | return -EINVAL; | |
597 | } | |
598 | ||
599 | numvirtchips = cfi->numchips * numparts; | |
600 | newcfi = kmalloc(sizeof(struct cfi_private) + numvirtchips * sizeof(struct flchip), GFP_KERNEL); | |
601 | if (!newcfi) | |
602 | return -ENOMEM; | |
603 | shared = kmalloc(sizeof(struct flchip_shared) * cfi->numchips, GFP_KERNEL); | |
604 | if (!shared) { | |
605 | kfree(newcfi); | |
606 | return -ENOMEM; | |
607 | } | |
608 | memcpy(newcfi, cfi, sizeof(struct cfi_private)); | |
609 | newcfi->numchips = numvirtchips; | |
610 | newcfi->chipshift = partshift; | |
611 | ||
612 | chip = &newcfi->chips[0]; | |
613 | for (i = 0; i < cfi->numchips; i++) { | |
614 | shared[i].writing = shared[i].erasing = NULL; | |
615 | spin_lock_init(&shared[i].lock); | |
616 | for (j = 0; j < numparts; j++) { | |
617 | *chip = cfi->chips[i]; | |
618 | chip->start += j << partshift; | |
619 | chip->priv = &shared[i]; | |
620 | /* those should be reset too since | |
621 | they create memory references. */ | |
622 | init_waitqueue_head(&chip->wq); | |
623 | spin_lock_init(&chip->_spinlock); | |
624 | chip->mutex = &chip->_spinlock; | |
625 | chip++; | |
626 | } | |
627 | } | |
628 | ||
629 | printk(KERN_DEBUG "%s: %d set(s) of %d interleaved chips " | |
630 | "--> %d partitions of %d KiB\n", | |
631 | map->name, cfi->numchips, cfi->interleave, | |
632 | newcfi->numchips, 1<<(newcfi->chipshift-10)); | |
633 | ||
634 | map->fldrv_priv = newcfi; | |
635 | *pcfi = newcfi; | |
636 | kfree(cfi); | |
637 | } | |
638 | ||
639 | return 0; | |
640 | } | |
641 | ||
642 | /* | |
643 | * *********** CHIP ACCESS FUNCTIONS *********** | |
644 | */ | |
5a37cf19 | 645 | static int chip_ready (struct map_info *map, struct flchip *chip, unsigned long adr, int mode) |
1da177e4 LT |
646 | { |
647 | DECLARE_WAITQUEUE(wait, current); | |
648 | struct cfi_private *cfi = map->fldrv_priv; | |
649 | map_word status, status_OK = CMD(0x80), status_PWS = CMD(0x01); | |
1da177e4 | 650 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; |
5a37cf19 | 651 | unsigned long timeo = jiffies + HZ; |
1da177e4 LT |
652 | |
653 | switch (chip->state) { | |
654 | ||
655 | case FL_STATUS: | |
656 | for (;;) { | |
657 | status = map_read(map, adr); | |
658 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
659 | break; | |
660 | ||
661 | /* At this point we're fine with write operations | |
662 | in other partitions as they don't conflict. */ | |
663 | if (chip->priv && map_word_andequal(map, status, status_PWS, status_PWS)) | |
664 | break; | |
665 | ||
1da177e4 LT |
666 | spin_unlock(chip->mutex); |
667 | cfi_udelay(1); | |
668 | spin_lock(chip->mutex); | |
669 | /* Someone else might have been playing with it. */ | |
5a37cf19 | 670 | return -EAGAIN; |
1da177e4 | 671 | } |
1f948b43 | 672 | |
1da177e4 LT |
673 | case FL_READY: |
674 | case FL_CFI_QUERY: | |
675 | case FL_JEDEC_QUERY: | |
676 | return 0; | |
677 | ||
678 | case FL_ERASING: | |
679 | if (!cfip || | |
680 | !(cfip->FeatureSupport & 2) || | |
681 | !(mode == FL_READY || mode == FL_POINT || | |
682 | (mode == FL_WRITING && (cfip->SuspendCmdSupport & 1)))) | |
683 | goto sleep; | |
684 | ||
685 | ||
686 | /* Erase suspend */ | |
687 | map_write(map, CMD(0xB0), adr); | |
688 | ||
689 | /* If the flash has finished erasing, then 'erase suspend' | |
690 | * appears to make some (28F320) flash devices switch to | |
691 | * 'read' mode. Make sure that we switch to 'read status' | |
692 | * mode so we get the right data. --rmk | |
693 | */ | |
694 | map_write(map, CMD(0x70), adr); | |
695 | chip->oldstate = FL_ERASING; | |
696 | chip->state = FL_ERASE_SUSPENDING; | |
697 | chip->erase_suspended = 1; | |
698 | for (;;) { | |
699 | status = map_read(map, adr); | |
700 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
701 | break; | |
702 | ||
703 | if (time_after(jiffies, timeo)) { | |
704 | /* Urgh. Resume and pretend we weren't here. */ | |
705 | map_write(map, CMD(0xd0), adr); | |
706 | /* Make sure we're in 'read status' mode if it had finished */ | |
707 | map_write(map, CMD(0x70), adr); | |
708 | chip->state = FL_ERASING; | |
709 | chip->oldstate = FL_READY; | |
4843653c NP |
710 | printk(KERN_ERR "%s: Chip not ready after erase " |
711 | "suspended: status = 0x%lx\n", map->name, status.x[0]); | |
1da177e4 LT |
712 | return -EIO; |
713 | } | |
714 | ||
715 | spin_unlock(chip->mutex); | |
716 | cfi_udelay(1); | |
717 | spin_lock(chip->mutex); | |
718 | /* Nobody will touch it while it's in state FL_ERASE_SUSPENDING. | |
719 | So we can just loop here. */ | |
720 | } | |
721 | chip->state = FL_STATUS; | |
722 | return 0; | |
723 | ||
724 | case FL_XIP_WHILE_ERASING: | |
725 | if (mode != FL_READY && mode != FL_POINT && | |
726 | (mode != FL_WRITING || !cfip || !(cfip->SuspendCmdSupport&1))) | |
727 | goto sleep; | |
728 | chip->oldstate = chip->state; | |
729 | chip->state = FL_READY; | |
730 | return 0; | |
731 | ||
732 | case FL_POINT: | |
733 | /* Only if there's no operation suspended... */ | |
734 | if (mode == FL_READY && chip->oldstate == FL_READY) | |
735 | return 0; | |
736 | ||
c4a9f88d KH |
737 | case FL_SHUTDOWN: |
738 | /* The machine is rebooting now,so no one can get chip anymore */ | |
739 | return -EIO; | |
1da177e4 LT |
740 | default: |
741 | sleep: | |
742 | set_current_state(TASK_UNINTERRUPTIBLE); | |
743 | add_wait_queue(&chip->wq, &wait); | |
744 | spin_unlock(chip->mutex); | |
745 | schedule(); | |
746 | remove_wait_queue(&chip->wq, &wait); | |
747 | spin_lock(chip->mutex); | |
5a37cf19 AK |
748 | return -EAGAIN; |
749 | } | |
750 | } | |
751 | ||
752 | static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode) | |
753 | { | |
754 | int ret; | |
755 | ||
756 | retry: | |
757 | if (chip->priv && (mode == FL_WRITING || mode == FL_ERASING | |
758 | || mode == FL_OTP_WRITE || mode == FL_SHUTDOWN)) { | |
759 | /* | |
760 | * OK. We have possibility for contention on the write/erase | |
761 | * operations which are global to the real chip and not per | |
762 | * partition. So let's fight it over in the partition which | |
763 | * currently has authority on the operation. | |
764 | * | |
765 | * The rules are as follows: | |
766 | * | |
767 | * - any write operation must own shared->writing. | |
768 | * | |
769 | * - any erase operation must own _both_ shared->writing and | |
770 | * shared->erasing. | |
771 | * | |
772 | * - contention arbitration is handled in the owner's context. | |
773 | * | |
774 | * The 'shared' struct can be read and/or written only when | |
775 | * its lock is taken. | |
776 | */ | |
777 | struct flchip_shared *shared = chip->priv; | |
778 | struct flchip *contender; | |
779 | spin_lock(&shared->lock); | |
780 | contender = shared->writing; | |
781 | if (contender && contender != chip) { | |
782 | /* | |
783 | * The engine to perform desired operation on this | |
784 | * partition is already in use by someone else. | |
785 | * Let's fight over it in the context of the chip | |
786 | * currently using it. If it is possible to suspend, | |
787 | * that other partition will do just that, otherwise | |
788 | * it'll happily send us to sleep. In any case, when | |
789 | * get_chip returns success we're clear to go ahead. | |
790 | */ | |
791 | ret = spin_trylock(contender->mutex); | |
792 | spin_unlock(&shared->lock); | |
793 | if (!ret) | |
794 | goto retry; | |
795 | spin_unlock(chip->mutex); | |
796 | ret = chip_ready(map, contender, contender->start, mode); | |
797 | spin_lock(chip->mutex); | |
798 | ||
799 | if (ret == -EAGAIN) { | |
800 | spin_unlock(contender->mutex); | |
801 | goto retry; | |
802 | } | |
803 | if (ret) { | |
804 | spin_unlock(contender->mutex); | |
805 | return ret; | |
806 | } | |
807 | spin_lock(&shared->lock); | |
808 | spin_unlock(contender->mutex); | |
809 | } | |
810 | ||
811 | /* We now own it */ | |
812 | shared->writing = chip; | |
813 | if (mode == FL_ERASING) | |
814 | shared->erasing = chip; | |
815 | spin_unlock(&shared->lock); | |
1da177e4 | 816 | } |
5a37cf19 AK |
817 | ret = chip_ready(map, chip, adr, mode); |
818 | if (ret == -EAGAIN) | |
819 | goto retry; | |
820 | ||
821 | return ret; | |
1da177e4 LT |
822 | } |
823 | ||
824 | static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr) | |
825 | { | |
826 | struct cfi_private *cfi = map->fldrv_priv; | |
827 | ||
828 | if (chip->priv) { | |
829 | struct flchip_shared *shared = chip->priv; | |
830 | spin_lock(&shared->lock); | |
831 | if (shared->writing == chip && chip->oldstate == FL_READY) { | |
832 | /* We own the ability to write, but we're done */ | |
833 | shared->writing = shared->erasing; | |
834 | if (shared->writing && shared->writing != chip) { | |
835 | /* give back ownership to who we loaned it from */ | |
836 | struct flchip *loaner = shared->writing; | |
837 | spin_lock(loaner->mutex); | |
838 | spin_unlock(&shared->lock); | |
839 | spin_unlock(chip->mutex); | |
840 | put_chip(map, loaner, loaner->start); | |
841 | spin_lock(chip->mutex); | |
842 | spin_unlock(loaner->mutex); | |
843 | wake_up(&chip->wq); | |
844 | return; | |
845 | } | |
846 | shared->erasing = NULL; | |
847 | shared->writing = NULL; | |
848 | } else if (shared->erasing == chip && shared->writing != chip) { | |
849 | /* | |
850 | * We own the ability to erase without the ability | |
851 | * to write, which means the erase was suspended | |
852 | * and some other partition is currently writing. | |
853 | * Don't let the switch below mess things up since | |
854 | * we don't have ownership to resume anything. | |
855 | */ | |
856 | spin_unlock(&shared->lock); | |
857 | wake_up(&chip->wq); | |
858 | return; | |
859 | } | |
860 | spin_unlock(&shared->lock); | |
861 | } | |
862 | ||
863 | switch(chip->oldstate) { | |
864 | case FL_ERASING: | |
865 | chip->state = chip->oldstate; | |
1f948b43 | 866 | /* What if one interleaved chip has finished and the |
1da177e4 | 867 | other hasn't? The old code would leave the finished |
1f948b43 | 868 | one in READY mode. That's bad, and caused -EROFS |
1da177e4 LT |
869 | errors to be returned from do_erase_oneblock because |
870 | that's the only bit it checked for at the time. | |
1f948b43 | 871 | As the state machine appears to explicitly allow |
1da177e4 | 872 | sending the 0x70 (Read Status) command to an erasing |
1f948b43 | 873 | chip and expecting it to be ignored, that's what we |
1da177e4 LT |
874 | do. */ |
875 | map_write(map, CMD(0xd0), adr); | |
876 | map_write(map, CMD(0x70), adr); | |
877 | chip->oldstate = FL_READY; | |
878 | chip->state = FL_ERASING; | |
879 | break; | |
880 | ||
881 | case FL_XIP_WHILE_ERASING: | |
882 | chip->state = chip->oldstate; | |
883 | chip->oldstate = FL_READY; | |
884 | break; | |
885 | ||
886 | case FL_READY: | |
887 | case FL_STATUS: | |
888 | case FL_JEDEC_QUERY: | |
889 | /* We should really make set_vpp() count, rather than doing this */ | |
890 | DISABLE_VPP(map); | |
891 | break; | |
892 | default: | |
4843653c | 893 | printk(KERN_ERR "%s: put_chip() called with oldstate %d!!\n", map->name, chip->oldstate); |
1da177e4 LT |
894 | } |
895 | wake_up(&chip->wq); | |
896 | } | |
897 | ||
898 | #ifdef CONFIG_MTD_XIP | |
899 | ||
900 | /* | |
901 | * No interrupt what so ever can be serviced while the flash isn't in array | |
902 | * mode. This is ensured by the xip_disable() and xip_enable() functions | |
903 | * enclosing any code path where the flash is known not to be in array mode. | |
904 | * And within a XIP disabled code path, only functions marked with __xipram | |
905 | * may be called and nothing else (it's a good thing to inspect generated | |
906 | * assembly to make sure inline functions were actually inlined and that gcc | |
907 | * didn't emit calls to its own support functions). Also configuring MTD CFI | |
908 | * support to a single buswidth and a single interleave is also recommended. | |
1da177e4 LT |
909 | */ |
910 | ||
911 | static void xip_disable(struct map_info *map, struct flchip *chip, | |
912 | unsigned long adr) | |
913 | { | |
914 | /* TODO: chips with no XIP use should ignore and return */ | |
915 | (void) map_read(map, adr); /* ensure mmu mapping is up to date */ | |
1da177e4 LT |
916 | local_irq_disable(); |
917 | } | |
918 | ||
919 | static void __xipram xip_enable(struct map_info *map, struct flchip *chip, | |
920 | unsigned long adr) | |
921 | { | |
922 | struct cfi_private *cfi = map->fldrv_priv; | |
923 | if (chip->state != FL_POINT && chip->state != FL_READY) { | |
924 | map_write(map, CMD(0xff), adr); | |
925 | chip->state = FL_READY; | |
926 | } | |
927 | (void) map_read(map, adr); | |
97f927a4 | 928 | xip_iprefetch(); |
1da177e4 | 929 | local_irq_enable(); |
1da177e4 LT |
930 | } |
931 | ||
932 | /* | |
933 | * When a delay is required for the flash operation to complete, the | |
c172471b NP |
934 | * xip_wait_for_operation() function is polling for both the given timeout |
935 | * and pending (but still masked) hardware interrupts. Whenever there is an | |
936 | * interrupt pending then the flash erase or write operation is suspended, | |
937 | * array mode restored and interrupts unmasked. Task scheduling might also | |
938 | * happen at that point. The CPU eventually returns from the interrupt or | |
939 | * the call to schedule() and the suspended flash operation is resumed for | |
940 | * the remaining of the delay period. | |
1da177e4 LT |
941 | * |
942 | * Warning: this function _will_ fool interrupt latency tracing tools. | |
943 | */ | |
944 | ||
c172471b NP |
945 | static int __xipram xip_wait_for_operation( |
946 | struct map_info *map, struct flchip *chip, | |
46a1652c | 947 | unsigned long adr, unsigned int chip_op_time ) |
1da177e4 LT |
948 | { |
949 | struct cfi_private *cfi = map->fldrv_priv; | |
950 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; | |
951 | map_word status, OK = CMD(0x80); | |
c172471b | 952 | unsigned long usec, suspended, start, done; |
1da177e4 LT |
953 | flstate_t oldstate, newstate; |
954 | ||
c172471b | 955 | start = xip_currtime(); |
46a1652c | 956 | usec = chip_op_time * 8; |
c172471b NP |
957 | if (usec == 0) |
958 | usec = 500000; | |
959 | done = 0; | |
960 | ||
1da177e4 LT |
961 | do { |
962 | cpu_relax(); | |
963 | if (xip_irqpending() && cfip && | |
964 | ((chip->state == FL_ERASING && (cfip->FeatureSupport&2)) || | |
965 | (chip->state == FL_WRITING && (cfip->FeatureSupport&4))) && | |
966 | (cfi_interleave_is_1(cfi) || chip->oldstate == FL_READY)) { | |
967 | /* | |
968 | * Let's suspend the erase or write operation when | |
969 | * supported. Note that we currently don't try to | |
970 | * suspend interleaved chips if there is already | |
971 | * another operation suspended (imagine what happens | |
972 | * when one chip was already done with the current | |
973 | * operation while another chip suspended it, then | |
974 | * we resume the whole thing at once). Yes, it | |
975 | * can happen! | |
976 | */ | |
c172471b | 977 | usec -= done; |
1da177e4 LT |
978 | map_write(map, CMD(0xb0), adr); |
979 | map_write(map, CMD(0x70), adr); | |
1da177e4 LT |
980 | suspended = xip_currtime(); |
981 | do { | |
982 | if (xip_elapsed_since(suspended) > 100000) { | |
983 | /* | |
984 | * The chip doesn't want to suspend | |
985 | * after waiting for 100 msecs. | |
986 | * This is a critical error but there | |
987 | * is not much we can do here. | |
988 | */ | |
c172471b | 989 | return -EIO; |
1da177e4 LT |
990 | } |
991 | status = map_read(map, adr); | |
992 | } while (!map_word_andequal(map, status, OK, OK)); | |
993 | ||
994 | /* Suspend succeeded */ | |
995 | oldstate = chip->state; | |
996 | if (oldstate == FL_ERASING) { | |
997 | if (!map_word_bitsset(map, status, CMD(0x40))) | |
998 | break; | |
999 | newstate = FL_XIP_WHILE_ERASING; | |
1000 | chip->erase_suspended = 1; | |
1001 | } else { | |
1002 | if (!map_word_bitsset(map, status, CMD(0x04))) | |
1003 | break; | |
1004 | newstate = FL_XIP_WHILE_WRITING; | |
1005 | chip->write_suspended = 1; | |
1006 | } | |
1007 | chip->state = newstate; | |
1008 | map_write(map, CMD(0xff), adr); | |
1009 | (void) map_read(map, adr); | |
1010 | asm volatile (".rep 8; nop; .endr"); | |
1011 | local_irq_enable(); | |
6da70124 | 1012 | spin_unlock(chip->mutex); |
1da177e4 LT |
1013 | asm volatile (".rep 8; nop; .endr"); |
1014 | cond_resched(); | |
1015 | ||
1016 | /* | |
1017 | * We're back. However someone else might have | |
1018 | * decided to go write to the chip if we are in | |
1019 | * a suspended erase state. If so let's wait | |
1020 | * until it's done. | |
1021 | */ | |
6da70124 | 1022 | spin_lock(chip->mutex); |
1da177e4 LT |
1023 | while (chip->state != newstate) { |
1024 | DECLARE_WAITQUEUE(wait, current); | |
1025 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1026 | add_wait_queue(&chip->wq, &wait); | |
6da70124 | 1027 | spin_unlock(chip->mutex); |
1da177e4 LT |
1028 | schedule(); |
1029 | remove_wait_queue(&chip->wq, &wait); | |
6da70124 | 1030 | spin_lock(chip->mutex); |
1da177e4 LT |
1031 | } |
1032 | /* Disallow XIP again */ | |
1033 | local_irq_disable(); | |
1034 | ||
1035 | /* Resume the write or erase operation */ | |
1036 | map_write(map, CMD(0xd0), adr); | |
1037 | map_write(map, CMD(0x70), adr); | |
1038 | chip->state = oldstate; | |
1039 | start = xip_currtime(); | |
1040 | } else if (usec >= 1000000/HZ) { | |
1041 | /* | |
1042 | * Try to save on CPU power when waiting delay | |
1043 | * is at least a system timer tick period. | |
1044 | * No need to be extremely accurate here. | |
1045 | */ | |
1046 | xip_cpu_idle(); | |
1047 | } | |
1048 | status = map_read(map, adr); | |
c172471b | 1049 | done = xip_elapsed_since(start); |
1da177e4 | 1050 | } while (!map_word_andequal(map, status, OK, OK) |
c172471b | 1051 | && done < usec); |
1da177e4 | 1052 | |
c172471b NP |
1053 | return (done >= usec) ? -ETIME : 0; |
1054 | } | |
1da177e4 LT |
1055 | |
1056 | /* | |
1057 | * The INVALIDATE_CACHED_RANGE() macro is normally used in parallel while | |
1058 | * the flash is actively programming or erasing since we have to poll for | |
1059 | * the operation to complete anyway. We can't do that in a generic way with | |
6da70124 | 1060 | * a XIP setup so do it before the actual flash operation in this case |
c172471b | 1061 | * and stub it out from INVAL_CACHE_AND_WAIT. |
1da177e4 | 1062 | */ |
6da70124 NP |
1063 | #define XIP_INVAL_CACHED_RANGE(map, from, size) \ |
1064 | INVALIDATE_CACHED_RANGE(map, from, size) | |
1065 | ||
46a1652c AK |
1066 | #define INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, inval_adr, inval_len, usec) \ |
1067 | xip_wait_for_operation(map, chip, cmd_adr, usec) | |
1da177e4 LT |
1068 | |
1069 | #else | |
1070 | ||
1071 | #define xip_disable(map, chip, adr) | |
1072 | #define xip_enable(map, chip, adr) | |
1da177e4 | 1073 | #define XIP_INVAL_CACHED_RANGE(x...) |
c172471b NP |
1074 | #define INVAL_CACHE_AND_WAIT inval_cache_and_wait_for_operation |
1075 | ||
1076 | static int inval_cache_and_wait_for_operation( | |
1077 | struct map_info *map, struct flchip *chip, | |
1078 | unsigned long cmd_adr, unsigned long inval_adr, int inval_len, | |
46a1652c | 1079 | unsigned int chip_op_time) |
c172471b NP |
1080 | { |
1081 | struct cfi_private *cfi = map->fldrv_priv; | |
1082 | map_word status, status_OK = CMD(0x80); | |
46a1652c AK |
1083 | int chip_state = chip->state; |
1084 | unsigned int timeo, sleep_time; | |
c172471b NP |
1085 | |
1086 | spin_unlock(chip->mutex); | |
1087 | if (inval_len) | |
1088 | INVALIDATE_CACHED_RANGE(map, inval_adr, inval_len); | |
c172471b NP |
1089 | spin_lock(chip->mutex); |
1090 | ||
46a1652c AK |
1091 | /* set our timeout to 8 times the expected delay */ |
1092 | timeo = chip_op_time * 8; | |
1093 | if (!timeo) | |
1094 | timeo = 500000; | |
1095 | sleep_time = chip_op_time / 2; | |
c172471b | 1096 | |
c172471b | 1097 | for (;;) { |
c172471b NP |
1098 | status = map_read(map, cmd_adr); |
1099 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
1100 | break; | |
1da177e4 | 1101 | |
46a1652c | 1102 | if (!timeo) { |
c172471b NP |
1103 | map_write(map, CMD(0x70), cmd_adr); |
1104 | chip->state = FL_STATUS; | |
1105 | return -ETIME; | |
1106 | } | |
1107 | ||
46a1652c | 1108 | /* OK Still waiting. Drop the lock, wait a while and retry. */ |
c172471b | 1109 | spin_unlock(chip->mutex); |
46a1652c AK |
1110 | if (sleep_time >= 1000000/HZ) { |
1111 | /* | |
1112 | * Half of the normal delay still remaining | |
1113 | * can be performed with a sleeping delay instead | |
1114 | * of busy waiting. | |
1115 | */ | |
1116 | msleep(sleep_time/1000); | |
1117 | timeo -= sleep_time; | |
1118 | sleep_time = 1000000/HZ; | |
1119 | } else { | |
1120 | udelay(1); | |
1121 | cond_resched(); | |
1122 | timeo--; | |
1123 | } | |
c172471b | 1124 | spin_lock(chip->mutex); |
c172471b | 1125 | |
967bf623 | 1126 | while (chip->state != chip_state) { |
46a1652c AK |
1127 | /* Someone's suspended the operation: sleep */ |
1128 | DECLARE_WAITQUEUE(wait, current); | |
1129 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1130 | add_wait_queue(&chip->wq, &wait); | |
1131 | spin_unlock(chip->mutex); | |
1132 | schedule(); | |
1133 | remove_wait_queue(&chip->wq, &wait); | |
1134 | spin_lock(chip->mutex); | |
1135 | } | |
1136 | } | |
c172471b NP |
1137 | |
1138 | /* Done and happy. */ | |
1139 | chip->state = FL_STATUS; | |
1140 | return 0; | |
1141 | } | |
6da70124 | 1142 | |
1da177e4 LT |
1143 | #endif |
1144 | ||
c172471b | 1145 | #define WAIT_TIMEOUT(map, chip, adr, udelay) \ |
46a1652c | 1146 | INVAL_CACHE_AND_WAIT(map, chip, adr, 0, 0, udelay); |
c172471b NP |
1147 | |
1148 | ||
1da177e4 LT |
1149 | static int do_point_onechip (struct map_info *map, struct flchip *chip, loff_t adr, size_t len) |
1150 | { | |
1151 | unsigned long cmd_addr; | |
1152 | struct cfi_private *cfi = map->fldrv_priv; | |
1153 | int ret = 0; | |
1154 | ||
1155 | adr += chip->start; | |
1156 | ||
1f948b43 TG |
1157 | /* Ensure cmd read/writes are aligned. */ |
1158 | cmd_addr = adr & ~(map_bankwidth(map)-1); | |
1da177e4 LT |
1159 | |
1160 | spin_lock(chip->mutex); | |
1161 | ||
1162 | ret = get_chip(map, chip, cmd_addr, FL_POINT); | |
1163 | ||
1164 | if (!ret) { | |
1165 | if (chip->state != FL_POINT && chip->state != FL_READY) | |
1166 | map_write(map, CMD(0xff), cmd_addr); | |
1167 | ||
1168 | chip->state = FL_POINT; | |
1169 | chip->ref_point_counter++; | |
1170 | } | |
1171 | spin_unlock(chip->mutex); | |
1172 | ||
1173 | return ret; | |
1174 | } | |
1175 | ||
1176 | static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf) | |
1177 | { | |
1178 | struct map_info *map = mtd->priv; | |
1179 | struct cfi_private *cfi = map->fldrv_priv; | |
097f2576 | 1180 | unsigned long ofs, last_end = 0; |
1da177e4 LT |
1181 | int chipnum; |
1182 | int ret = 0; | |
1183 | ||
1184 | if (!map->virt || (from + len > mtd->size)) | |
1185 | return -EINVAL; | |
1f948b43 | 1186 | |
1da177e4 LT |
1187 | /* Now lock the chip(s) to POINT state */ |
1188 | ||
1189 | /* ofs: offset within the first chip that the first read should start */ | |
1190 | chipnum = (from >> cfi->chipshift); | |
1191 | ofs = from - (chipnum << cfi->chipshift); | |
1192 | ||
097f2576 AL |
1193 | *mtdbuf = (void *)map->virt + cfi->chips[chipnum].start + ofs; |
1194 | *retlen = 0; | |
1195 | ||
1da177e4 LT |
1196 | while (len) { |
1197 | unsigned long thislen; | |
1198 | ||
1199 | if (chipnum >= cfi->numchips) | |
1200 | break; | |
1201 | ||
097f2576 AL |
1202 | /* We cannot point across chips that are virtually disjoint */ |
1203 | if (!last_end) | |
1204 | last_end = cfi->chips[chipnum].start; | |
1205 | else if (cfi->chips[chipnum].start != last_end) | |
1206 | break; | |
1207 | ||
1da177e4 LT |
1208 | if ((len + ofs -1) >> cfi->chipshift) |
1209 | thislen = (1<<cfi->chipshift) - ofs; | |
1210 | else | |
1211 | thislen = len; | |
1212 | ||
1213 | ret = do_point_onechip(map, &cfi->chips[chipnum], ofs, thislen); | |
1214 | if (ret) | |
1215 | break; | |
1216 | ||
1217 | *retlen += thislen; | |
1218 | len -= thislen; | |
1f948b43 | 1219 | |
1da177e4 | 1220 | ofs = 0; |
097f2576 | 1221 | last_end += 1 << cfi->chipshift; |
1da177e4 LT |
1222 | chipnum++; |
1223 | } | |
1224 | return 0; | |
1225 | } | |
1226 | ||
1227 | static void cfi_intelext_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, size_t len) | |
1228 | { | |
1229 | struct map_info *map = mtd->priv; | |
1230 | struct cfi_private *cfi = map->fldrv_priv; | |
1231 | unsigned long ofs; | |
1232 | int chipnum; | |
1233 | ||
1234 | /* Now unlock the chip(s) POINT state */ | |
1235 | ||
1236 | /* ofs: offset within the first chip that the first read should start */ | |
1237 | chipnum = (from >> cfi->chipshift); | |
1238 | ofs = from - (chipnum << cfi->chipshift); | |
1239 | ||
1240 | while (len) { | |
1241 | unsigned long thislen; | |
1242 | struct flchip *chip; | |
1243 | ||
1244 | chip = &cfi->chips[chipnum]; | |
1245 | if (chipnum >= cfi->numchips) | |
1246 | break; | |
1247 | ||
1248 | if ((len + ofs -1) >> cfi->chipshift) | |
1249 | thislen = (1<<cfi->chipshift) - ofs; | |
1250 | else | |
1251 | thislen = len; | |
1252 | ||
1253 | spin_lock(chip->mutex); | |
1254 | if (chip->state == FL_POINT) { | |
1255 | chip->ref_point_counter--; | |
1256 | if(chip->ref_point_counter == 0) | |
1257 | chip->state = FL_READY; | |
1258 | } else | |
4843653c | 1259 | printk(KERN_ERR "%s: Warning: unpoint called on non pointed region\n", map->name); /* Should this give an error? */ |
1da177e4 LT |
1260 | |
1261 | put_chip(map, chip, chip->start); | |
1262 | spin_unlock(chip->mutex); | |
1263 | ||
1264 | len -= thislen; | |
1265 | ofs = 0; | |
1266 | chipnum++; | |
1267 | } | |
1268 | } | |
1269 | ||
1270 | static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) | |
1271 | { | |
1272 | unsigned long cmd_addr; | |
1273 | struct cfi_private *cfi = map->fldrv_priv; | |
1274 | int ret; | |
1275 | ||
1276 | adr += chip->start; | |
1277 | ||
1f948b43 TG |
1278 | /* Ensure cmd read/writes are aligned. */ |
1279 | cmd_addr = adr & ~(map_bankwidth(map)-1); | |
1da177e4 LT |
1280 | |
1281 | spin_lock(chip->mutex); | |
1282 | ret = get_chip(map, chip, cmd_addr, FL_READY); | |
1283 | if (ret) { | |
1284 | spin_unlock(chip->mutex); | |
1285 | return ret; | |
1286 | } | |
1287 | ||
1288 | if (chip->state != FL_POINT && chip->state != FL_READY) { | |
1289 | map_write(map, CMD(0xff), cmd_addr); | |
1290 | ||
1291 | chip->state = FL_READY; | |
1292 | } | |
1293 | ||
1294 | map_copy_from(map, buf, adr, len); | |
1295 | ||
1296 | put_chip(map, chip, cmd_addr); | |
1297 | ||
1298 | spin_unlock(chip->mutex); | |
1299 | return 0; | |
1300 | } | |
1301 | ||
1302 | static int cfi_intelext_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) | |
1303 | { | |
1304 | struct map_info *map = mtd->priv; | |
1305 | struct cfi_private *cfi = map->fldrv_priv; | |
1306 | unsigned long ofs; | |
1307 | int chipnum; | |
1308 | int ret = 0; | |
1309 | ||
1310 | /* ofs: offset within the first chip that the first read should start */ | |
1311 | chipnum = (from >> cfi->chipshift); | |
1312 | ofs = from - (chipnum << cfi->chipshift); | |
1313 | ||
1314 | *retlen = 0; | |
1315 | ||
1316 | while (len) { | |
1317 | unsigned long thislen; | |
1318 | ||
1319 | if (chipnum >= cfi->numchips) | |
1320 | break; | |
1321 | ||
1322 | if ((len + ofs -1) >> cfi->chipshift) | |
1323 | thislen = (1<<cfi->chipshift) - ofs; | |
1324 | else | |
1325 | thislen = len; | |
1326 | ||
1327 | ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); | |
1328 | if (ret) | |
1329 | break; | |
1330 | ||
1331 | *retlen += thislen; | |
1332 | len -= thislen; | |
1333 | buf += thislen; | |
1f948b43 | 1334 | |
1da177e4 LT |
1335 | ofs = 0; |
1336 | chipnum++; | |
1337 | } | |
1338 | return ret; | |
1339 | } | |
1340 | ||
1da177e4 | 1341 | static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, |
f77814dd | 1342 | unsigned long adr, map_word datum, int mode) |
1da177e4 LT |
1343 | { |
1344 | struct cfi_private *cfi = map->fldrv_priv; | |
c172471b NP |
1345 | map_word status, write_cmd; |
1346 | int ret=0; | |
1da177e4 LT |
1347 | |
1348 | adr += chip->start; | |
1349 | ||
f77814dd | 1350 | switch (mode) { |
638d9838 NP |
1351 | case FL_WRITING: |
1352 | write_cmd = (cfi->cfiq->P_ID != 0x0200) ? CMD(0x40) : CMD(0x41); | |
1353 | break; | |
1354 | case FL_OTP_WRITE: | |
1355 | write_cmd = CMD(0xc0); | |
1356 | break; | |
1357 | default: | |
1358 | return -EINVAL; | |
f77814dd | 1359 | } |
1da177e4 LT |
1360 | |
1361 | spin_lock(chip->mutex); | |
f77814dd | 1362 | ret = get_chip(map, chip, adr, mode); |
1da177e4 LT |
1363 | if (ret) { |
1364 | spin_unlock(chip->mutex); | |
1365 | return ret; | |
1366 | } | |
1367 | ||
1368 | XIP_INVAL_CACHED_RANGE(map, adr, map_bankwidth(map)); | |
1369 | ENABLE_VPP(map); | |
1370 | xip_disable(map, chip, adr); | |
f77814dd | 1371 | map_write(map, write_cmd, adr); |
1da177e4 | 1372 | map_write(map, datum, adr); |
f77814dd | 1373 | chip->state = mode; |
1da177e4 | 1374 | |
c172471b NP |
1375 | ret = INVAL_CACHE_AND_WAIT(map, chip, adr, |
1376 | adr, map_bankwidth(map), | |
46a1652c | 1377 | chip->word_write_time); |
c172471b NP |
1378 | if (ret) { |
1379 | xip_enable(map, chip, adr); | |
1380 | printk(KERN_ERR "%s: word write error (status timeout)\n", map->name); | |
1381 | goto out; | |
1da177e4 | 1382 | } |
1da177e4 | 1383 | |
4843653c | 1384 | /* check for errors */ |
c172471b | 1385 | status = map_read(map, adr); |
4843653c NP |
1386 | if (map_word_bitsset(map, status, CMD(0x1a))) { |
1387 | unsigned long chipstatus = MERGESTATUS(status); | |
1388 | ||
1389 | /* reset status */ | |
1da177e4 | 1390 | map_write(map, CMD(0x50), adr); |
1da177e4 | 1391 | map_write(map, CMD(0x70), adr); |
4843653c NP |
1392 | xip_enable(map, chip, adr); |
1393 | ||
1394 | if (chipstatus & 0x02) { | |
1395 | ret = -EROFS; | |
1396 | } else if (chipstatus & 0x08) { | |
1397 | printk(KERN_ERR "%s: word write error (bad VPP)\n", map->name); | |
1398 | ret = -EIO; | |
1399 | } else { | |
1400 | printk(KERN_ERR "%s: word write error (status 0x%lx)\n", map->name, chipstatus); | |
1401 | ret = -EINVAL; | |
1402 | } | |
1403 | ||
1404 | goto out; | |
1da177e4 LT |
1405 | } |
1406 | ||
1407 | xip_enable(map, chip, adr); | |
1408 | out: put_chip(map, chip, adr); | |
1409 | spin_unlock(chip->mutex); | |
1da177e4 LT |
1410 | return ret; |
1411 | } | |
1412 | ||
1413 | ||
1414 | static int cfi_intelext_write_words (struct mtd_info *mtd, loff_t to , size_t len, size_t *retlen, const u_char *buf) | |
1415 | { | |
1416 | struct map_info *map = mtd->priv; | |
1417 | struct cfi_private *cfi = map->fldrv_priv; | |
1418 | int ret = 0; | |
1419 | int chipnum; | |
1420 | unsigned long ofs; | |
1421 | ||
1422 | *retlen = 0; | |
1423 | if (!len) | |
1424 | return 0; | |
1425 | ||
1426 | chipnum = to >> cfi->chipshift; | |
1427 | ofs = to - (chipnum << cfi->chipshift); | |
1428 | ||
1429 | /* If it's not bus-aligned, do the first byte write */ | |
1430 | if (ofs & (map_bankwidth(map)-1)) { | |
1431 | unsigned long bus_ofs = ofs & ~(map_bankwidth(map)-1); | |
1432 | int gap = ofs - bus_ofs; | |
1433 | int n; | |
1434 | map_word datum; | |
1435 | ||
1436 | n = min_t(int, len, map_bankwidth(map)-gap); | |
1437 | datum = map_word_ff(map); | |
1438 | datum = map_word_load_partial(map, datum, buf, gap, n); | |
1439 | ||
1440 | ret = do_write_oneword(map, &cfi->chips[chipnum], | |
f77814dd | 1441 | bus_ofs, datum, FL_WRITING); |
1f948b43 | 1442 | if (ret) |
1da177e4 LT |
1443 | return ret; |
1444 | ||
1445 | len -= n; | |
1446 | ofs += n; | |
1447 | buf += n; | |
1448 | (*retlen) += n; | |
1449 | ||
1450 | if (ofs >> cfi->chipshift) { | |
1f948b43 | 1451 | chipnum ++; |
1da177e4 LT |
1452 | ofs = 0; |
1453 | if (chipnum == cfi->numchips) | |
1454 | return 0; | |
1455 | } | |
1456 | } | |
1f948b43 | 1457 | |
1da177e4 LT |
1458 | while(len >= map_bankwidth(map)) { |
1459 | map_word datum = map_word_load(map, buf); | |
1460 | ||
1461 | ret = do_write_oneword(map, &cfi->chips[chipnum], | |
f77814dd | 1462 | ofs, datum, FL_WRITING); |
1da177e4 LT |
1463 | if (ret) |
1464 | return ret; | |
1465 | ||
1466 | ofs += map_bankwidth(map); | |
1467 | buf += map_bankwidth(map); | |
1468 | (*retlen) += map_bankwidth(map); | |
1469 | len -= map_bankwidth(map); | |
1470 | ||
1471 | if (ofs >> cfi->chipshift) { | |
1f948b43 | 1472 | chipnum ++; |
1da177e4 LT |
1473 | ofs = 0; |
1474 | if (chipnum == cfi->numchips) | |
1475 | return 0; | |
1476 | } | |
1477 | } | |
1478 | ||
1479 | if (len & (map_bankwidth(map)-1)) { | |
1480 | map_word datum; | |
1481 | ||
1482 | datum = map_word_ff(map); | |
1483 | datum = map_word_load_partial(map, datum, buf, 0, len); | |
1484 | ||
1485 | ret = do_write_oneword(map, &cfi->chips[chipnum], | |
f77814dd | 1486 | ofs, datum, FL_WRITING); |
1f948b43 | 1487 | if (ret) |
1da177e4 | 1488 | return ret; |
1f948b43 | 1489 | |
1da177e4 LT |
1490 | (*retlen) += len; |
1491 | } | |
1492 | ||
1493 | return 0; | |
1494 | } | |
1495 | ||
1496 | ||
1f948b43 | 1497 | static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, |
e102d54a NP |
1498 | unsigned long adr, const struct kvec **pvec, |
1499 | unsigned long *pvec_seek, int len) | |
1da177e4 LT |
1500 | { |
1501 | struct cfi_private *cfi = map->fldrv_priv; | |
c172471b NP |
1502 | map_word status, write_cmd, datum; |
1503 | unsigned long cmd_adr; | |
1504 | int ret, wbufsize, word_gap, words; | |
e102d54a NP |
1505 | const struct kvec *vec; |
1506 | unsigned long vec_seek; | |
1da177e4 LT |
1507 | |
1508 | wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; | |
1509 | adr += chip->start; | |
1510 | cmd_adr = adr & ~(wbufsize-1); | |
638d9838 | 1511 | |
1da177e4 | 1512 | /* Let's determine this according to the interleave only once */ |
638d9838 | 1513 | write_cmd = (cfi->cfiq->P_ID != 0x0200) ? CMD(0xe8) : CMD(0xe9); |
1da177e4 LT |
1514 | |
1515 | spin_lock(chip->mutex); | |
1516 | ret = get_chip(map, chip, cmd_adr, FL_WRITING); | |
1517 | if (ret) { | |
1518 | spin_unlock(chip->mutex); | |
1519 | return ret; | |
1520 | } | |
1521 | ||
1522 | XIP_INVAL_CACHED_RANGE(map, adr, len); | |
1523 | ENABLE_VPP(map); | |
1524 | xip_disable(map, chip, cmd_adr); | |
1525 | ||
151e7659 | 1526 | /* §4.8 of the 28FxxxJ3A datasheet says "Any time SR.4 and/or SR.5 is set |
1f948b43 | 1527 | [...], the device will not accept any more Write to Buffer commands". |
1da177e4 LT |
1528 | So we must check here and reset those bits if they're set. Otherwise |
1529 | we're just pissing in the wind */ | |
6e7a6809 | 1530 | if (chip->state != FL_STATUS) { |
1da177e4 | 1531 | map_write(map, CMD(0x70), cmd_adr); |
6e7a6809 NP |
1532 | chip->state = FL_STATUS; |
1533 | } | |
1da177e4 LT |
1534 | status = map_read(map, cmd_adr); |
1535 | if (map_word_bitsset(map, status, CMD(0x30))) { | |
1536 | xip_enable(map, chip, cmd_adr); | |
1537 | printk(KERN_WARNING "SR.4 or SR.5 bits set in buffer write (status %lx). Clearing.\n", status.x[0]); | |
1538 | xip_disable(map, chip, cmd_adr); | |
1539 | map_write(map, CMD(0x50), cmd_adr); | |
1540 | map_write(map, CMD(0x70), cmd_adr); | |
1541 | } | |
1542 | ||
1543 | chip->state = FL_WRITING_TO_BUFFER; | |
c172471b NP |
1544 | map_write(map, write_cmd, cmd_adr); |
1545 | ret = WAIT_TIMEOUT(map, chip, cmd_adr, 0); | |
1546 | if (ret) { | |
1547 | /* Argh. Not ready for write to buffer */ | |
1548 | map_word Xstatus = map_read(map, cmd_adr); | |
1549 | map_write(map, CMD(0x70), cmd_adr); | |
1550 | chip->state = FL_STATUS; | |
1da177e4 | 1551 | status = map_read(map, cmd_adr); |
c172471b NP |
1552 | map_write(map, CMD(0x50), cmd_adr); |
1553 | map_write(map, CMD(0x70), cmd_adr); | |
1554 | xip_enable(map, chip, cmd_adr); | |
1555 | printk(KERN_ERR "%s: Chip not ready for buffer write. Xstatus = %lx, status = %lx\n", | |
1556 | map->name, Xstatus.x[0], status.x[0]); | |
1557 | goto out; | |
1da177e4 LT |
1558 | } |
1559 | ||
e102d54a NP |
1560 | /* Figure out the number of words to write */ |
1561 | word_gap = (-adr & (map_bankwidth(map)-1)); | |
1562 | words = (len - word_gap + map_bankwidth(map) - 1) / map_bankwidth(map); | |
1563 | if (!word_gap) { | |
1564 | words--; | |
1565 | } else { | |
1566 | word_gap = map_bankwidth(map) - word_gap; | |
1567 | adr -= word_gap; | |
1568 | datum = map_word_ff(map); | |
1569 | } | |
1570 | ||
1da177e4 | 1571 | /* Write length of data to come */ |
e102d54a | 1572 | map_write(map, CMD(words), cmd_adr ); |
1da177e4 LT |
1573 | |
1574 | /* Write data */ | |
e102d54a NP |
1575 | vec = *pvec; |
1576 | vec_seek = *pvec_seek; | |
1577 | do { | |
1578 | int n = map_bankwidth(map) - word_gap; | |
1579 | if (n > vec->iov_len - vec_seek) | |
1580 | n = vec->iov_len - vec_seek; | |
1581 | if (n > len) | |
1582 | n = len; | |
1da177e4 | 1583 | |
e102d54a NP |
1584 | if (!word_gap && len < map_bankwidth(map)) |
1585 | datum = map_word_ff(map); | |
1da177e4 | 1586 | |
e102d54a | 1587 | datum = map_word_load_partial(map, datum, |
1f948b43 | 1588 | vec->iov_base + vec_seek, |
e102d54a | 1589 | word_gap, n); |
1da177e4 | 1590 | |
e102d54a NP |
1591 | len -= n; |
1592 | word_gap += n; | |
1593 | if (!len || word_gap == map_bankwidth(map)) { | |
1594 | map_write(map, datum, adr); | |
1595 | adr += map_bankwidth(map); | |
1596 | word_gap = 0; | |
1597 | } | |
1da177e4 | 1598 | |
e102d54a NP |
1599 | vec_seek += n; |
1600 | if (vec_seek == vec->iov_len) { | |
1601 | vec++; | |
1602 | vec_seek = 0; | |
1603 | } | |
1604 | } while (len); | |
1605 | *pvec = vec; | |
1606 | *pvec_seek = vec_seek; | |
1da177e4 LT |
1607 | |
1608 | /* GO GO GO */ | |
1609 | map_write(map, CMD(0xd0), cmd_adr); | |
1610 | chip->state = FL_WRITING; | |
1611 | ||
c172471b NP |
1612 | ret = INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, |
1613 | adr, len, | |
46a1652c | 1614 | chip->buffer_write_time); |
c172471b NP |
1615 | if (ret) { |
1616 | map_write(map, CMD(0x70), cmd_adr); | |
1617 | chip->state = FL_STATUS; | |
1618 | xip_enable(map, chip, cmd_adr); | |
1619 | printk(KERN_ERR "%s: buffer write error (status timeout)\n", map->name); | |
1620 | goto out; | |
1da177e4 | 1621 | } |
1da177e4 | 1622 | |
4843653c | 1623 | /* check for errors */ |
c172471b | 1624 | status = map_read(map, cmd_adr); |
4843653c NP |
1625 | if (map_word_bitsset(map, status, CMD(0x1a))) { |
1626 | unsigned long chipstatus = MERGESTATUS(status); | |
1627 | ||
1628 | /* reset status */ | |
1da177e4 | 1629 | map_write(map, CMD(0x50), cmd_adr); |
4843653c NP |
1630 | map_write(map, CMD(0x70), cmd_adr); |
1631 | xip_enable(map, chip, cmd_adr); | |
1632 | ||
1633 | if (chipstatus & 0x02) { | |
1634 | ret = -EROFS; | |
1635 | } else if (chipstatus & 0x08) { | |
1636 | printk(KERN_ERR "%s: buffer write error (bad VPP)\n", map->name); | |
1637 | ret = -EIO; | |
1638 | } else { | |
1639 | printk(KERN_ERR "%s: buffer write error (status 0x%lx)\n", map->name, chipstatus); | |
1640 | ret = -EINVAL; | |
1641 | } | |
1642 | ||
1643 | goto out; | |
1da177e4 LT |
1644 | } |
1645 | ||
1646 | xip_enable(map, chip, cmd_adr); | |
1647 | out: put_chip(map, chip, cmd_adr); | |
1648 | spin_unlock(chip->mutex); | |
1649 | return ret; | |
1650 | } | |
1651 | ||
e102d54a NP |
1652 | static int cfi_intelext_writev (struct mtd_info *mtd, const struct kvec *vecs, |
1653 | unsigned long count, loff_t to, size_t *retlen) | |
1da177e4 LT |
1654 | { |
1655 | struct map_info *map = mtd->priv; | |
1656 | struct cfi_private *cfi = map->fldrv_priv; | |
1657 | int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; | |
1658 | int ret = 0; | |
1659 | int chipnum; | |
e102d54a NP |
1660 | unsigned long ofs, vec_seek, i; |
1661 | size_t len = 0; | |
1662 | ||
1663 | for (i = 0; i < count; i++) | |
1664 | len += vecs[i].iov_len; | |
1da177e4 LT |
1665 | |
1666 | *retlen = 0; | |
1667 | if (!len) | |
1668 | return 0; | |
1669 | ||
1670 | chipnum = to >> cfi->chipshift; | |
e102d54a NP |
1671 | ofs = to - (chipnum << cfi->chipshift); |
1672 | vec_seek = 0; | |
1da177e4 | 1673 | |
e102d54a | 1674 | do { |
1da177e4 LT |
1675 | /* We must not cross write block boundaries */ |
1676 | int size = wbufsize - (ofs & (wbufsize-1)); | |
1677 | ||
1678 | if (size > len) | |
1679 | size = len; | |
1f948b43 | 1680 | ret = do_write_buffer(map, &cfi->chips[chipnum], |
e102d54a | 1681 | ofs, &vecs, &vec_seek, size); |
1da177e4 LT |
1682 | if (ret) |
1683 | return ret; | |
1684 | ||
1685 | ofs += size; | |
1da177e4 LT |
1686 | (*retlen) += size; |
1687 | len -= size; | |
1688 | ||
1689 | if (ofs >> cfi->chipshift) { | |
1f948b43 | 1690 | chipnum ++; |
1da177e4 LT |
1691 | ofs = 0; |
1692 | if (chipnum == cfi->numchips) | |
1693 | return 0; | |
1694 | } | |
df54b52c JB |
1695 | |
1696 | /* Be nice and reschedule with the chip in a usable state for other | |
1697 | processes. */ | |
1698 | cond_resched(); | |
1699 | ||
e102d54a NP |
1700 | } while (len); |
1701 | ||
1da177e4 LT |
1702 | return 0; |
1703 | } | |
1704 | ||
e102d54a NP |
1705 | static int cfi_intelext_write_buffers (struct mtd_info *mtd, loff_t to, |
1706 | size_t len, size_t *retlen, const u_char *buf) | |
1707 | { | |
1708 | struct kvec vec; | |
1709 | ||
1710 | vec.iov_base = (void *) buf; | |
1711 | vec.iov_len = len; | |
1712 | ||
1713 | return cfi_intelext_writev(mtd, &vec, 1, to, retlen); | |
1714 | } | |
1715 | ||
1da177e4 LT |
1716 | static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, |
1717 | unsigned long adr, int len, void *thunk) | |
1718 | { | |
1719 | struct cfi_private *cfi = map->fldrv_priv; | |
c172471b | 1720 | map_word status; |
1da177e4 | 1721 | int retries = 3; |
c172471b | 1722 | int ret; |
1da177e4 LT |
1723 | |
1724 | adr += chip->start; | |
1725 | ||
1da177e4 LT |
1726 | retry: |
1727 | spin_lock(chip->mutex); | |
1728 | ret = get_chip(map, chip, adr, FL_ERASING); | |
1729 | if (ret) { | |
1730 | spin_unlock(chip->mutex); | |
1731 | return ret; | |
1732 | } | |
1733 | ||
1734 | XIP_INVAL_CACHED_RANGE(map, adr, len); | |
1735 | ENABLE_VPP(map); | |
1736 | xip_disable(map, chip, adr); | |
1737 | ||
1738 | /* Clear the status register first */ | |
1739 | map_write(map, CMD(0x50), adr); | |
1740 | ||
1741 | /* Now erase */ | |
1742 | map_write(map, CMD(0x20), adr); | |
1743 | map_write(map, CMD(0xD0), adr); | |
1744 | chip->state = FL_ERASING; | |
1745 | chip->erase_suspended = 0; | |
1746 | ||
c172471b NP |
1747 | ret = INVAL_CACHE_AND_WAIT(map, chip, adr, |
1748 | adr, len, | |
46a1652c | 1749 | chip->erase_time); |
c172471b NP |
1750 | if (ret) { |
1751 | map_write(map, CMD(0x70), adr); | |
1752 | chip->state = FL_STATUS; | |
1753 | xip_enable(map, chip, adr); | |
1754 | printk(KERN_ERR "%s: block erase error: (status timeout)\n", map->name); | |
1755 | goto out; | |
1da177e4 LT |
1756 | } |
1757 | ||
1758 | /* We've broken this before. It doesn't hurt to be safe */ | |
1759 | map_write(map, CMD(0x70), adr); | |
1760 | chip->state = FL_STATUS; | |
1761 | status = map_read(map, adr); | |
1762 | ||
4843653c | 1763 | /* check for errors */ |
1da177e4 | 1764 | if (map_word_bitsset(map, status, CMD(0x3a))) { |
4843653c | 1765 | unsigned long chipstatus = MERGESTATUS(status); |
1da177e4 LT |
1766 | |
1767 | /* Reset the error bits */ | |
1768 | map_write(map, CMD(0x50), adr); | |
1769 | map_write(map, CMD(0x70), adr); | |
1770 | xip_enable(map, chip, adr); | |
1771 | ||
1da177e4 | 1772 | if ((chipstatus & 0x30) == 0x30) { |
4843653c NP |
1773 | printk(KERN_ERR "%s: block erase error: (bad command sequence, status 0x%lx)\n", map->name, chipstatus); |
1774 | ret = -EINVAL; | |
1da177e4 LT |
1775 | } else if (chipstatus & 0x02) { |
1776 | /* Protection bit set */ | |
1777 | ret = -EROFS; | |
1778 | } else if (chipstatus & 0x8) { | |
1779 | /* Voltage */ | |
4843653c | 1780 | printk(KERN_ERR "%s: block erase error: (bad VPP)\n", map->name); |
1da177e4 | 1781 | ret = -EIO; |
4843653c NP |
1782 | } else if (chipstatus & 0x20 && retries--) { |
1783 | printk(KERN_DEBUG "block erase failed at 0x%08lx: status 0x%lx. Retrying...\n", adr, chipstatus); | |
4843653c NP |
1784 | put_chip(map, chip, adr); |
1785 | spin_unlock(chip->mutex); | |
1786 | goto retry; | |
1787 | } else { | |
1788 | printk(KERN_ERR "%s: block erase failed at 0x%08lx (status 0x%lx)\n", map->name, adr, chipstatus); | |
1da177e4 LT |
1789 | ret = -EIO; |
1790 | } | |
4843653c NP |
1791 | |
1792 | goto out; | |
1da177e4 LT |
1793 | } |
1794 | ||
4843653c | 1795 | xip_enable(map, chip, adr); |
1da177e4 LT |
1796 | out: put_chip(map, chip, adr); |
1797 | spin_unlock(chip->mutex); | |
1798 | return ret; | |
1799 | } | |
1800 | ||
029a9eb1 | 1801 | static int cfi_intelext_erase_varsize(struct mtd_info *mtd, struct erase_info *instr) |
1da177e4 LT |
1802 | { |
1803 | unsigned long ofs, len; | |
1804 | int ret; | |
1805 | ||
1806 | ofs = instr->addr; | |
1807 | len = instr->len; | |
1808 | ||
1809 | ret = cfi_varsize_frob(mtd, do_erase_oneblock, ofs, len, NULL); | |
1810 | if (ret) | |
1811 | return ret; | |
1812 | ||
1813 | instr->state = MTD_ERASE_DONE; | |
1814 | mtd_erase_callback(instr); | |
1f948b43 | 1815 | |
1da177e4 LT |
1816 | return 0; |
1817 | } | |
1818 | ||
1819 | static void cfi_intelext_sync (struct mtd_info *mtd) | |
1820 | { | |
1821 | struct map_info *map = mtd->priv; | |
1822 | struct cfi_private *cfi = map->fldrv_priv; | |
1823 | int i; | |
1824 | struct flchip *chip; | |
1825 | int ret = 0; | |
1826 | ||
1827 | for (i=0; !ret && i<cfi->numchips; i++) { | |
1828 | chip = &cfi->chips[i]; | |
1829 | ||
1830 | spin_lock(chip->mutex); | |
1831 | ret = get_chip(map, chip, chip->start, FL_SYNCING); | |
1832 | ||
1833 | if (!ret) { | |
1834 | chip->oldstate = chip->state; | |
1835 | chip->state = FL_SYNCING; | |
1f948b43 | 1836 | /* No need to wake_up() on this state change - |
1da177e4 LT |
1837 | * as the whole point is that nobody can do anything |
1838 | * with the chip now anyway. | |
1839 | */ | |
1840 | } | |
1841 | spin_unlock(chip->mutex); | |
1842 | } | |
1843 | ||
1844 | /* Unlock the chips again */ | |
1845 | ||
1846 | for (i--; i >=0; i--) { | |
1847 | chip = &cfi->chips[i]; | |
1848 | ||
1849 | spin_lock(chip->mutex); | |
1f948b43 | 1850 | |
1da177e4 LT |
1851 | if (chip->state == FL_SYNCING) { |
1852 | chip->state = chip->oldstate; | |
09c79335 | 1853 | chip->oldstate = FL_READY; |
1da177e4 LT |
1854 | wake_up(&chip->wq); |
1855 | } | |
1856 | spin_unlock(chip->mutex); | |
1857 | } | |
1858 | } | |
1859 | ||
0ecbc81a | 1860 | static int __xipram do_getlockstatus_oneblock(struct map_info *map, |
1da177e4 LT |
1861 | struct flchip *chip, |
1862 | unsigned long adr, | |
1863 | int len, void *thunk) | |
1864 | { | |
1865 | struct cfi_private *cfi = map->fldrv_priv; | |
1866 | int status, ofs_factor = cfi->interleave * cfi->device_type; | |
1867 | ||
c25bb1f5 | 1868 | adr += chip->start; |
1da177e4 | 1869 | xip_disable(map, chip, adr+(2*ofs_factor)); |
c25bb1f5 | 1870 | map_write(map, CMD(0x90), adr+(2*ofs_factor)); |
1da177e4 LT |
1871 | chip->state = FL_JEDEC_QUERY; |
1872 | status = cfi_read_query(map, adr+(2*ofs_factor)); | |
1873 | xip_enable(map, chip, 0); | |
0ecbc81a RG |
1874 | return status; |
1875 | } | |
1876 | ||
1877 | #ifdef DEBUG_LOCK_BITS | |
1878 | static int __xipram do_printlockstatus_oneblock(struct map_info *map, | |
1879 | struct flchip *chip, | |
1880 | unsigned long adr, | |
1881 | int len, void *thunk) | |
1882 | { | |
1da177e4 | 1883 | printk(KERN_DEBUG "block status register for 0x%08lx is %x\n", |
0ecbc81a | 1884 | adr, do_getlockstatus_oneblock(map, chip, adr, len, thunk)); |
1da177e4 LT |
1885 | return 0; |
1886 | } | |
1887 | #endif | |
1888 | ||
1889 | #define DO_XXLOCK_ONEBLOCK_LOCK ((void *) 1) | |
1890 | #define DO_XXLOCK_ONEBLOCK_UNLOCK ((void *) 2) | |
1891 | ||
1892 | static int __xipram do_xxlock_oneblock(struct map_info *map, struct flchip *chip, | |
1893 | unsigned long adr, int len, void *thunk) | |
1894 | { | |
1895 | struct cfi_private *cfi = map->fldrv_priv; | |
9a6e73ec | 1896 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
c172471b | 1897 | int udelay; |
1da177e4 LT |
1898 | int ret; |
1899 | ||
1900 | adr += chip->start; | |
1901 | ||
1da177e4 LT |
1902 | spin_lock(chip->mutex); |
1903 | ret = get_chip(map, chip, adr, FL_LOCKING); | |
1904 | if (ret) { | |
1905 | spin_unlock(chip->mutex); | |
1906 | return ret; | |
1907 | } | |
1908 | ||
1909 | ENABLE_VPP(map); | |
1910 | xip_disable(map, chip, adr); | |
1f948b43 | 1911 | |
1da177e4 LT |
1912 | map_write(map, CMD(0x60), adr); |
1913 | if (thunk == DO_XXLOCK_ONEBLOCK_LOCK) { | |
1914 | map_write(map, CMD(0x01), adr); | |
1915 | chip->state = FL_LOCKING; | |
1916 | } else if (thunk == DO_XXLOCK_ONEBLOCK_UNLOCK) { | |
1917 | map_write(map, CMD(0xD0), adr); | |
1918 | chip->state = FL_UNLOCKING; | |
1919 | } else | |
1920 | BUG(); | |
1921 | ||
9a6e73ec TP |
1922 | /* |
1923 | * If Instant Individual Block Locking supported then no need | |
1924 | * to delay. | |
1925 | */ | |
c172471b | 1926 | udelay = (!extp || !(extp->FeatureSupport & (1 << 5))) ? 1000000/HZ : 0; |
9a6e73ec | 1927 | |
c172471b NP |
1928 | ret = WAIT_TIMEOUT(map, chip, adr, udelay); |
1929 | if (ret) { | |
1930 | map_write(map, CMD(0x70), adr); | |
1931 | chip->state = FL_STATUS; | |
1932 | xip_enable(map, chip, adr); | |
1933 | printk(KERN_ERR "%s: block unlock error: (status timeout)\n", map->name); | |
1934 | goto out; | |
1da177e4 | 1935 | } |
1f948b43 | 1936 | |
1da177e4 | 1937 | xip_enable(map, chip, adr); |
c172471b | 1938 | out: put_chip(map, chip, adr); |
1da177e4 | 1939 | spin_unlock(chip->mutex); |
c172471b | 1940 | return ret; |
1da177e4 LT |
1941 | } |
1942 | ||
1943 | static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, size_t len) | |
1944 | { | |
1945 | int ret; | |
1946 | ||
1947 | #ifdef DEBUG_LOCK_BITS | |
1948 | printk(KERN_DEBUG "%s: lock status before, ofs=0x%08llx, len=0x%08X\n", | |
1949 | __FUNCTION__, ofs, len); | |
1950 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, | |
1da1caf8 | 1951 | ofs, len, NULL); |
1da177e4 LT |
1952 | #endif |
1953 | ||
1f948b43 | 1954 | ret = cfi_varsize_frob(mtd, do_xxlock_oneblock, |
1da177e4 | 1955 | ofs, len, DO_XXLOCK_ONEBLOCK_LOCK); |
1f948b43 | 1956 | |
1da177e4 LT |
1957 | #ifdef DEBUG_LOCK_BITS |
1958 | printk(KERN_DEBUG "%s: lock status after, ret=%d\n", | |
1959 | __FUNCTION__, ret); | |
1960 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, | |
1da1caf8 | 1961 | ofs, len, NULL); |
1da177e4 LT |
1962 | #endif |
1963 | ||
1964 | return ret; | |
1965 | } | |
1966 | ||
1967 | static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, size_t len) | |
1968 | { | |
1969 | int ret; | |
1970 | ||
1971 | #ifdef DEBUG_LOCK_BITS | |
1972 | printk(KERN_DEBUG "%s: lock status before, ofs=0x%08llx, len=0x%08X\n", | |
1973 | __FUNCTION__, ofs, len); | |
1974 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, | |
1da1caf8 | 1975 | ofs, len, NULL); |
1da177e4 LT |
1976 | #endif |
1977 | ||
1978 | ret = cfi_varsize_frob(mtd, do_xxlock_oneblock, | |
1979 | ofs, len, DO_XXLOCK_ONEBLOCK_UNLOCK); | |
1f948b43 | 1980 | |
1da177e4 LT |
1981 | #ifdef DEBUG_LOCK_BITS |
1982 | printk(KERN_DEBUG "%s: lock status after, ret=%d\n", | |
1983 | __FUNCTION__, ret); | |
1f948b43 | 1984 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, |
1da1caf8 | 1985 | ofs, len, NULL); |
1da177e4 | 1986 | #endif |
1f948b43 | 1987 | |
1da177e4 LT |
1988 | return ret; |
1989 | } | |
1990 | ||
f77814dd NP |
1991 | #ifdef CONFIG_MTD_OTP |
1992 | ||
1f948b43 | 1993 | typedef int (*otp_op_t)(struct map_info *map, struct flchip *chip, |
f77814dd NP |
1994 | u_long data_offset, u_char *buf, u_int size, |
1995 | u_long prot_offset, u_int groupno, u_int groupsize); | |
1996 | ||
1997 | static int __xipram | |
1998 | do_otp_read(struct map_info *map, struct flchip *chip, u_long offset, | |
1999 | u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) | |
2000 | { | |
2001 | struct cfi_private *cfi = map->fldrv_priv; | |
2002 | int ret; | |
2003 | ||
2004 | spin_lock(chip->mutex); | |
2005 | ret = get_chip(map, chip, chip->start, FL_JEDEC_QUERY); | |
2006 | if (ret) { | |
2007 | spin_unlock(chip->mutex); | |
2008 | return ret; | |
2009 | } | |
2010 | ||
2011 | /* let's ensure we're not reading back cached data from array mode */ | |
6da70124 | 2012 | INVALIDATE_CACHED_RANGE(map, chip->start + offset, size); |
f77814dd NP |
2013 | |
2014 | xip_disable(map, chip, chip->start); | |
2015 | if (chip->state != FL_JEDEC_QUERY) { | |
2016 | map_write(map, CMD(0x90), chip->start); | |
2017 | chip->state = FL_JEDEC_QUERY; | |
2018 | } | |
2019 | map_copy_from(map, buf, chip->start + offset, size); | |
2020 | xip_enable(map, chip, chip->start); | |
2021 | ||
2022 | /* then ensure we don't keep OTP data in the cache */ | |
6da70124 | 2023 | INVALIDATE_CACHED_RANGE(map, chip->start + offset, size); |
f77814dd NP |
2024 | |
2025 | put_chip(map, chip, chip->start); | |
2026 | spin_unlock(chip->mutex); | |
2027 | return 0; | |
2028 | } | |
2029 | ||
2030 | static int | |
2031 | do_otp_write(struct map_info *map, struct flchip *chip, u_long offset, | |
2032 | u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) | |
2033 | { | |
2034 | int ret; | |
2035 | ||
2036 | while (size) { | |
2037 | unsigned long bus_ofs = offset & ~(map_bankwidth(map)-1); | |
2038 | int gap = offset - bus_ofs; | |
2039 | int n = min_t(int, size, map_bankwidth(map)-gap); | |
2040 | map_word datum = map_word_ff(map); | |
2041 | ||
2042 | datum = map_word_load_partial(map, datum, buf, gap, n); | |
2043 | ret = do_write_oneword(map, chip, bus_ofs, datum, FL_OTP_WRITE); | |
1f948b43 | 2044 | if (ret) |
f77814dd NP |
2045 | return ret; |
2046 | ||
2047 | offset += n; | |
2048 | buf += n; | |
2049 | size -= n; | |
2050 | } | |
2051 | ||
2052 | return 0; | |
2053 | } | |
2054 | ||
2055 | static int | |
2056 | do_otp_lock(struct map_info *map, struct flchip *chip, u_long offset, | |
2057 | u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) | |
2058 | { | |
2059 | struct cfi_private *cfi = map->fldrv_priv; | |
2060 | map_word datum; | |
2061 | ||
2062 | /* make sure area matches group boundaries */ | |
332d71f7 | 2063 | if (size != grpsz) |
f77814dd NP |
2064 | return -EXDEV; |
2065 | ||
2066 | datum = map_word_ff(map); | |
2067 | datum = map_word_clr(map, datum, CMD(1 << grpno)); | |
2068 | return do_write_oneword(map, chip, prot, datum, FL_OTP_WRITE); | |
2069 | } | |
2070 | ||
2071 | static int cfi_intelext_otp_walk(struct mtd_info *mtd, loff_t from, size_t len, | |
2072 | size_t *retlen, u_char *buf, | |
2073 | otp_op_t action, int user_regs) | |
2074 | { | |
2075 | struct map_info *map = mtd->priv; | |
2076 | struct cfi_private *cfi = map->fldrv_priv; | |
2077 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; | |
2078 | struct flchip *chip; | |
2079 | struct cfi_intelext_otpinfo *otp; | |
2080 | u_long devsize, reg_prot_offset, data_offset; | |
2081 | u_int chip_num, chip_step, field, reg_fact_size, reg_user_size; | |
2082 | u_int groups, groupno, groupsize, reg_fact_groups, reg_user_groups; | |
2083 | int ret; | |
2084 | ||
2085 | *retlen = 0; | |
2086 | ||
2087 | /* Check that we actually have some OTP registers */ | |
2088 | if (!extp || !(extp->FeatureSupport & 64) || !extp->NumProtectionFields) | |
2089 | return -ENODATA; | |
2090 | ||
2091 | /* we need real chips here not virtual ones */ | |
2092 | devsize = (1 << cfi->cfiq->DevSize) * cfi->interleave; | |
2093 | chip_step = devsize >> cfi->chipshift; | |
dce2b4da NP |
2094 | chip_num = 0; |
2095 | ||
2096 | /* Some chips have OTP located in the _top_ partition only. | |
2097 | For example: Intel 28F256L18T (T means top-parameter device) */ | |
2098 | if (cfi->mfr == MANUFACTURER_INTEL) { | |
2099 | switch (cfi->id) { | |
2100 | case 0x880b: | |
2101 | case 0x880c: | |
2102 | case 0x880d: | |
2103 | chip_num = chip_step - 1; | |
2104 | } | |
2105 | } | |
f77814dd | 2106 | |
dce2b4da | 2107 | for ( ; chip_num < cfi->numchips; chip_num += chip_step) { |
f77814dd NP |
2108 | chip = &cfi->chips[chip_num]; |
2109 | otp = (struct cfi_intelext_otpinfo *)&extp->extra[0]; | |
2110 | ||
2111 | /* first OTP region */ | |
2112 | field = 0; | |
2113 | reg_prot_offset = extp->ProtRegAddr; | |
2114 | reg_fact_groups = 1; | |
2115 | reg_fact_size = 1 << extp->FactProtRegSize; | |
2116 | reg_user_groups = 1; | |
2117 | reg_user_size = 1 << extp->UserProtRegSize; | |
2118 | ||
2119 | while (len > 0) { | |
2120 | /* flash geometry fixup */ | |
2121 | data_offset = reg_prot_offset + 1; | |
2122 | data_offset *= cfi->interleave * cfi->device_type; | |
2123 | reg_prot_offset *= cfi->interleave * cfi->device_type; | |
2124 | reg_fact_size *= cfi->interleave; | |
2125 | reg_user_size *= cfi->interleave; | |
2126 | ||
2127 | if (user_regs) { | |
2128 | groups = reg_user_groups; | |
2129 | groupsize = reg_user_size; | |
2130 | /* skip over factory reg area */ | |
2131 | groupno = reg_fact_groups; | |
2132 | data_offset += reg_fact_groups * reg_fact_size; | |
2133 | } else { | |
2134 | groups = reg_fact_groups; | |
2135 | groupsize = reg_fact_size; | |
2136 | groupno = 0; | |
2137 | } | |
2138 | ||
332d71f7 | 2139 | while (len > 0 && groups > 0) { |
f77814dd NP |
2140 | if (!action) { |
2141 | /* | |
2142 | * Special case: if action is NULL | |
2143 | * we fill buf with otp_info records. | |
2144 | */ | |
2145 | struct otp_info *otpinfo; | |
2146 | map_word lockword; | |
2147 | len -= sizeof(struct otp_info); | |
2148 | if (len <= 0) | |
2149 | return -ENOSPC; | |
2150 | ret = do_otp_read(map, chip, | |
2151 | reg_prot_offset, | |
2152 | (u_char *)&lockword, | |
2153 | map_bankwidth(map), | |
2154 | 0, 0, 0); | |
2155 | if (ret) | |
2156 | return ret; | |
2157 | otpinfo = (struct otp_info *)buf; | |
2158 | otpinfo->start = from; | |
2159 | otpinfo->length = groupsize; | |
2160 | otpinfo->locked = | |
2161 | !map_word_bitsset(map, lockword, | |
2162 | CMD(1 << groupno)); | |
2163 | from += groupsize; | |
2164 | buf += sizeof(*otpinfo); | |
2165 | *retlen += sizeof(*otpinfo); | |
2166 | } else if (from >= groupsize) { | |
2167 | from -= groupsize; | |
332d71f7 | 2168 | data_offset += groupsize; |
f77814dd NP |
2169 | } else { |
2170 | int size = groupsize; | |
2171 | data_offset += from; | |
2172 | size -= from; | |
2173 | from = 0; | |
2174 | if (size > len) | |
2175 | size = len; | |
2176 | ret = action(map, chip, data_offset, | |
2177 | buf, size, reg_prot_offset, | |
2178 | groupno, groupsize); | |
2179 | if (ret < 0) | |
2180 | return ret; | |
2181 | buf += size; | |
2182 | len -= size; | |
2183 | *retlen += size; | |
332d71f7 | 2184 | data_offset += size; |
f77814dd NP |
2185 | } |
2186 | groupno++; | |
2187 | groups--; | |
2188 | } | |
2189 | ||
2190 | /* next OTP region */ | |
2191 | if (++field == extp->NumProtectionFields) | |
2192 | break; | |
2193 | reg_prot_offset = otp->ProtRegAddr; | |
2194 | reg_fact_groups = otp->FactGroups; | |
2195 | reg_fact_size = 1 << otp->FactProtRegSize; | |
2196 | reg_user_groups = otp->UserGroups; | |
2197 | reg_user_size = 1 << otp->UserProtRegSize; | |
2198 | otp++; | |
2199 | } | |
2200 | } | |
2201 | ||
2202 | return 0; | |
2203 | } | |
2204 | ||
2205 | static int cfi_intelext_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, | |
2206 | size_t len, size_t *retlen, | |
2207 | u_char *buf) | |
2208 | { | |
2209 | return cfi_intelext_otp_walk(mtd, from, len, retlen, | |
2210 | buf, do_otp_read, 0); | |
2211 | } | |
2212 | ||
2213 | static int cfi_intelext_read_user_prot_reg(struct mtd_info *mtd, loff_t from, | |
2214 | size_t len, size_t *retlen, | |
2215 | u_char *buf) | |
2216 | { | |
2217 | return cfi_intelext_otp_walk(mtd, from, len, retlen, | |
2218 | buf, do_otp_read, 1); | |
2219 | } | |
2220 | ||
2221 | static int cfi_intelext_write_user_prot_reg(struct mtd_info *mtd, loff_t from, | |
2222 | size_t len, size_t *retlen, | |
2223 | u_char *buf) | |
2224 | { | |
2225 | return cfi_intelext_otp_walk(mtd, from, len, retlen, | |
2226 | buf, do_otp_write, 1); | |
2227 | } | |
2228 | ||
2229 | static int cfi_intelext_lock_user_prot_reg(struct mtd_info *mtd, | |
2230 | loff_t from, size_t len) | |
2231 | { | |
2232 | size_t retlen; | |
2233 | return cfi_intelext_otp_walk(mtd, from, len, &retlen, | |
2234 | NULL, do_otp_lock, 1); | |
2235 | } | |
2236 | ||
1f948b43 | 2237 | static int cfi_intelext_get_fact_prot_info(struct mtd_info *mtd, |
f77814dd NP |
2238 | struct otp_info *buf, size_t len) |
2239 | { | |
2240 | size_t retlen; | |
2241 | int ret; | |
2242 | ||
2243 | ret = cfi_intelext_otp_walk(mtd, 0, len, &retlen, (u_char *)buf, NULL, 0); | |
2244 | return ret ? : retlen; | |
2245 | } | |
2246 | ||
2247 | static int cfi_intelext_get_user_prot_info(struct mtd_info *mtd, | |
2248 | struct otp_info *buf, size_t len) | |
2249 | { | |
2250 | size_t retlen; | |
2251 | int ret; | |
2252 | ||
2253 | ret = cfi_intelext_otp_walk(mtd, 0, len, &retlen, (u_char *)buf, NULL, 1); | |
2254 | return ret ? : retlen; | |
2255 | } | |
2256 | ||
2257 | #endif | |
2258 | ||
0ecbc81a RG |
2259 | static void cfi_intelext_save_locks(struct mtd_info *mtd) |
2260 | { | |
2261 | struct mtd_erase_region_info *region; | |
2262 | int block, status, i; | |
2263 | unsigned long adr; | |
2264 | size_t len; | |
2265 | ||
2266 | for (i = 0; i < mtd->numeraseregions; i++) { | |
2267 | region = &mtd->eraseregions[i]; | |
2268 | if (!region->lockmap) | |
2269 | continue; | |
2270 | ||
2271 | for (block = 0; block < region->numblocks; block++){ | |
2272 | len = region->erasesize; | |
2273 | adr = region->offset + block * len; | |
2274 | ||
2275 | status = cfi_varsize_frob(mtd, | |
029a9eb1 | 2276 | do_getlockstatus_oneblock, adr, len, NULL); |
0ecbc81a RG |
2277 | if (status) |
2278 | set_bit(block, region->lockmap); | |
2279 | else | |
2280 | clear_bit(block, region->lockmap); | |
2281 | } | |
2282 | } | |
2283 | } | |
2284 | ||
1da177e4 LT |
2285 | static int cfi_intelext_suspend(struct mtd_info *mtd) |
2286 | { | |
2287 | struct map_info *map = mtd->priv; | |
2288 | struct cfi_private *cfi = map->fldrv_priv; | |
0ecbc81a | 2289 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
1da177e4 LT |
2290 | int i; |
2291 | struct flchip *chip; | |
2292 | int ret = 0; | |
2293 | ||
0ecbc81a RG |
2294 | if ((mtd->flags & MTD_STUPID_LOCK) |
2295 | && extp && (extp->FeatureSupport & (1 << 5))) | |
2296 | cfi_intelext_save_locks(mtd); | |
2297 | ||
1da177e4 LT |
2298 | for (i=0; !ret && i<cfi->numchips; i++) { |
2299 | chip = &cfi->chips[i]; | |
2300 | ||
2301 | spin_lock(chip->mutex); | |
2302 | ||
2303 | switch (chip->state) { | |
2304 | case FL_READY: | |
2305 | case FL_STATUS: | |
2306 | case FL_CFI_QUERY: | |
2307 | case FL_JEDEC_QUERY: | |
2308 | if (chip->oldstate == FL_READY) { | |
a86aaa6d DA |
2309 | /* place the chip in a known state before suspend */ |
2310 | map_write(map, CMD(0xFF), cfi->chips[i].start); | |
1da177e4 LT |
2311 | chip->oldstate = chip->state; |
2312 | chip->state = FL_PM_SUSPENDED; | |
1f948b43 | 2313 | /* No need to wake_up() on this state change - |
1da177e4 LT |
2314 | * as the whole point is that nobody can do anything |
2315 | * with the chip now anyway. | |
2316 | */ | |
2317 | } else { | |
2318 | /* There seems to be an operation pending. We must wait for it. */ | |
2319 | printk(KERN_NOTICE "Flash device refused suspend due to pending operation (oldstate %d)\n", chip->oldstate); | |
2320 | ret = -EAGAIN; | |
2321 | } | |
2322 | break; | |
2323 | default: | |
2324 | /* Should we actually wait? Once upon a time these routines weren't | |
2325 | allowed to. Or should we return -EAGAIN, because the upper layers | |
2326 | ought to have already shut down anything which was using the device | |
2327 | anyway? The latter for now. */ | |
2328 | printk(KERN_NOTICE "Flash device refused suspend due to active operation (state %d)\n", chip->oldstate); | |
2329 | ret = -EAGAIN; | |
2330 | case FL_PM_SUSPENDED: | |
2331 | break; | |
2332 | } | |
2333 | spin_unlock(chip->mutex); | |
2334 | } | |
2335 | ||
2336 | /* Unlock the chips again */ | |
2337 | ||
2338 | if (ret) { | |
2339 | for (i--; i >=0; i--) { | |
2340 | chip = &cfi->chips[i]; | |
1f948b43 | 2341 | |
1da177e4 | 2342 | spin_lock(chip->mutex); |
1f948b43 | 2343 | |
1da177e4 LT |
2344 | if (chip->state == FL_PM_SUSPENDED) { |
2345 | /* No need to force it into a known state here, | |
2346 | because we're returning failure, and it didn't | |
2347 | get power cycled */ | |
2348 | chip->state = chip->oldstate; | |
2349 | chip->oldstate = FL_READY; | |
2350 | wake_up(&chip->wq); | |
2351 | } | |
2352 | spin_unlock(chip->mutex); | |
2353 | } | |
1f948b43 TG |
2354 | } |
2355 | ||
1da177e4 LT |
2356 | return ret; |
2357 | } | |
2358 | ||
0ecbc81a RG |
2359 | static void cfi_intelext_restore_locks(struct mtd_info *mtd) |
2360 | { | |
2361 | struct mtd_erase_region_info *region; | |
2362 | int block, i; | |
2363 | unsigned long adr; | |
2364 | size_t len; | |
2365 | ||
2366 | for (i = 0; i < mtd->numeraseregions; i++) { | |
2367 | region = &mtd->eraseregions[i]; | |
2368 | if (!region->lockmap) | |
2369 | continue; | |
2370 | ||
2371 | for (block = 0; block < region->numblocks; block++) { | |
2372 | len = region->erasesize; | |
2373 | adr = region->offset + block * len; | |
2374 | ||
2375 | if (!test_bit(block, region->lockmap)) | |
2376 | cfi_intelext_unlock(mtd, adr, len); | |
2377 | } | |
2378 | } | |
2379 | } | |
2380 | ||
1da177e4 LT |
2381 | static void cfi_intelext_resume(struct mtd_info *mtd) |
2382 | { | |
2383 | struct map_info *map = mtd->priv; | |
2384 | struct cfi_private *cfi = map->fldrv_priv; | |
0ecbc81a | 2385 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
1da177e4 LT |
2386 | int i; |
2387 | struct flchip *chip; | |
2388 | ||
2389 | for (i=0; i<cfi->numchips; i++) { | |
1f948b43 | 2390 | |
1da177e4 LT |
2391 | chip = &cfi->chips[i]; |
2392 | ||
2393 | spin_lock(chip->mutex); | |
1f948b43 | 2394 | |
1da177e4 LT |
2395 | /* Go to known state. Chip may have been power cycled */ |
2396 | if (chip->state == FL_PM_SUSPENDED) { | |
2397 | map_write(map, CMD(0xFF), cfi->chips[i].start); | |
2398 | chip->oldstate = chip->state = FL_READY; | |
2399 | wake_up(&chip->wq); | |
2400 | } | |
2401 | ||
2402 | spin_unlock(chip->mutex); | |
2403 | } | |
0ecbc81a RG |
2404 | |
2405 | if ((mtd->flags & MTD_STUPID_LOCK) | |
2406 | && extp && (extp->FeatureSupport & (1 << 5))) | |
2407 | cfi_intelext_restore_locks(mtd); | |
1da177e4 LT |
2408 | } |
2409 | ||
963a6fb0 NP |
2410 | static int cfi_intelext_reset(struct mtd_info *mtd) |
2411 | { | |
2412 | struct map_info *map = mtd->priv; | |
2413 | struct cfi_private *cfi = map->fldrv_priv; | |
2414 | int i, ret; | |
2415 | ||
2416 | for (i=0; i < cfi->numchips; i++) { | |
2417 | struct flchip *chip = &cfi->chips[i]; | |
2418 | ||
2419 | /* force the completion of any ongoing operation | |
1f948b43 | 2420 | and switch to array mode so any bootloader in |
963a6fb0 NP |
2421 | flash is accessible for soft reboot. */ |
2422 | spin_lock(chip->mutex); | |
c4a9f88d | 2423 | ret = get_chip(map, chip, chip->start, FL_SHUTDOWN); |
963a6fb0 NP |
2424 | if (!ret) { |
2425 | map_write(map, CMD(0xff), chip->start); | |
c4a9f88d | 2426 | chip->state = FL_SHUTDOWN; |
963a6fb0 NP |
2427 | } |
2428 | spin_unlock(chip->mutex); | |
2429 | } | |
2430 | ||
2431 | return 0; | |
2432 | } | |
2433 | ||
2434 | static int cfi_intelext_reboot(struct notifier_block *nb, unsigned long val, | |
2435 | void *v) | |
2436 | { | |
2437 | struct mtd_info *mtd; | |
2438 | ||
2439 | mtd = container_of(nb, struct mtd_info, reboot_notifier); | |
2440 | cfi_intelext_reset(mtd); | |
2441 | return NOTIFY_DONE; | |
2442 | } | |
2443 | ||
1da177e4 LT |
2444 | static void cfi_intelext_destroy(struct mtd_info *mtd) |
2445 | { | |
2446 | struct map_info *map = mtd->priv; | |
2447 | struct cfi_private *cfi = map->fldrv_priv; | |
0ecbc81a RG |
2448 | struct mtd_erase_region_info *region; |
2449 | int i; | |
963a6fb0 NP |
2450 | cfi_intelext_reset(mtd); |
2451 | unregister_reboot_notifier(&mtd->reboot_notifier); | |
1da177e4 LT |
2452 | kfree(cfi->cmdset_priv); |
2453 | kfree(cfi->cfiq); | |
2454 | kfree(cfi->chips[0].priv); | |
2455 | kfree(cfi); | |
0ecbc81a RG |
2456 | for (i = 0; i < mtd->numeraseregions; i++) { |
2457 | region = &mtd->eraseregions[i]; | |
2458 | if (region->lockmap) | |
2459 | kfree(region->lockmap); | |
2460 | } | |
1da177e4 LT |
2461 | kfree(mtd->eraseregions); |
2462 | } | |
2463 | ||
1da177e4 LT |
2464 | MODULE_LICENSE("GPL"); |
2465 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org> et al."); | |
2466 | MODULE_DESCRIPTION("MTD chip driver for Intel/Sharp flash chips"); | |
a15bdeef DW |
2467 | MODULE_ALIAS("cfi_cmdset_0003"); |
2468 | MODULE_ALIAS("cfi_cmdset_0200"); |