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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 | ||
88 | static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode); | |
89 | static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr); | |
90 | #include "fwh_lock.h" | |
91 | ||
92 | ||
93 | ||
94 | /* | |
95 | * *********** SETUP AND PROBE BITS *********** | |
96 | */ | |
97 | ||
98 | static struct mtd_chip_driver cfi_intelext_chipdrv = { | |
99 | .probe = NULL, /* Not usable directly */ | |
100 | .destroy = cfi_intelext_destroy, | |
101 | .name = "cfi_cmdset_0001", | |
102 | .module = THIS_MODULE | |
103 | }; | |
104 | ||
105 | /* #define DEBUG_LOCK_BITS */ | |
106 | /* #define DEBUG_CFI_FEATURES */ | |
107 | ||
108 | #ifdef DEBUG_CFI_FEATURES | |
109 | static void cfi_tell_features(struct cfi_pri_intelext *extp) | |
110 | { | |
111 | int i; | |
638d9838 | 112 | printk(" Extended Query version %c.%c\n", extp->MajorVersion, extp->MinorVersion); |
1da177e4 LT |
113 | printk(" Feature/Command Support: %4.4X\n", extp->FeatureSupport); |
114 | printk(" - Chip Erase: %s\n", extp->FeatureSupport&1?"supported":"unsupported"); | |
115 | printk(" - Suspend Erase: %s\n", extp->FeatureSupport&2?"supported":"unsupported"); | |
116 | printk(" - Suspend Program: %s\n", extp->FeatureSupport&4?"supported":"unsupported"); | |
117 | printk(" - Legacy Lock/Unlock: %s\n", extp->FeatureSupport&8?"supported":"unsupported"); | |
118 | printk(" - Queued Erase: %s\n", extp->FeatureSupport&16?"supported":"unsupported"); | |
119 | printk(" - Instant block lock: %s\n", extp->FeatureSupport&32?"supported":"unsupported"); | |
120 | printk(" - Protection Bits: %s\n", extp->FeatureSupport&64?"supported":"unsupported"); | |
121 | printk(" - Page-mode read: %s\n", extp->FeatureSupport&128?"supported":"unsupported"); | |
122 | printk(" - Synchronous read: %s\n", extp->FeatureSupport&256?"supported":"unsupported"); | |
123 | printk(" - Simultaneous operations: %s\n", extp->FeatureSupport&512?"supported":"unsupported"); | |
638d9838 NP |
124 | printk(" - Extended Flash Array: %s\n", extp->FeatureSupport&1024?"supported":"unsupported"); |
125 | for (i=11; i<32; i++) { | |
1f948b43 | 126 | if (extp->FeatureSupport & (1<<i)) |
1da177e4 LT |
127 | printk(" - Unknown Bit %X: supported\n", i); |
128 | } | |
1f948b43 | 129 | |
1da177e4 LT |
130 | printk(" Supported functions after Suspend: %2.2X\n", extp->SuspendCmdSupport); |
131 | printk(" - Program after Erase Suspend: %s\n", extp->SuspendCmdSupport&1?"supported":"unsupported"); | |
132 | for (i=1; i<8; i++) { | |
133 | if (extp->SuspendCmdSupport & (1<<i)) | |
134 | printk(" - Unknown Bit %X: supported\n", i); | |
135 | } | |
1f948b43 | 136 | |
1da177e4 LT |
137 | printk(" Block Status Register Mask: %4.4X\n", extp->BlkStatusRegMask); |
138 | printk(" - Lock Bit Active: %s\n", extp->BlkStatusRegMask&1?"yes":"no"); | |
638d9838 NP |
139 | printk(" - Lock-Down Bit Active: %s\n", extp->BlkStatusRegMask&2?"yes":"no"); |
140 | for (i=2; i<3; i++) { | |
1da177e4 LT |
141 | if (extp->BlkStatusRegMask & (1<<i)) |
142 | printk(" - Unknown Bit %X Active: yes\n",i); | |
143 | } | |
638d9838 NP |
144 | printk(" - EFA Lock Bit: %s\n", extp->BlkStatusRegMask&16?"yes":"no"); |
145 | printk(" - EFA Lock-Down Bit: %s\n", extp->BlkStatusRegMask&32?"yes":"no"); | |
146 | for (i=6; i<16; i++) { | |
147 | if (extp->BlkStatusRegMask & (1<<i)) | |
148 | printk(" - Unknown Bit %X Active: yes\n",i); | |
149 | } | |
150 | ||
1f948b43 | 151 | printk(" Vcc Logic Supply Optimum Program/Erase Voltage: %d.%d V\n", |
1da177e4 LT |
152 | extp->VccOptimal >> 4, extp->VccOptimal & 0xf); |
153 | if (extp->VppOptimal) | |
1f948b43 | 154 | printk(" Vpp Programming Supply Optimum Program/Erase Voltage: %d.%d V\n", |
1da177e4 LT |
155 | extp->VppOptimal >> 4, extp->VppOptimal & 0xf); |
156 | } | |
157 | #endif | |
158 | ||
159 | #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE | |
1f948b43 | 160 | /* Some Intel Strata Flash prior to FPO revision C has bugs in this area */ |
1da177e4 LT |
161 | static void fixup_intel_strataflash(struct mtd_info *mtd, void* param) |
162 | { | |
163 | struct map_info *map = mtd->priv; | |
164 | struct cfi_private *cfi = map->fldrv_priv; | |
165 | struct cfi_pri_amdstd *extp = cfi->cmdset_priv; | |
166 | ||
167 | printk(KERN_WARNING "cfi_cmdset_0001: Suspend " | |
168 | "erase on write disabled.\n"); | |
169 | extp->SuspendCmdSupport &= ~1; | |
170 | } | |
171 | #endif | |
172 | ||
173 | #ifdef CMDSET0001_DISABLE_WRITE_SUSPEND | |
174 | static void fixup_no_write_suspend(struct mtd_info *mtd, void* param) | |
175 | { | |
176 | struct map_info *map = mtd->priv; | |
177 | struct cfi_private *cfi = map->fldrv_priv; | |
178 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; | |
179 | ||
180 | if (cfip && (cfip->FeatureSupport&4)) { | |
181 | cfip->FeatureSupport &= ~4; | |
182 | printk(KERN_WARNING "cfi_cmdset_0001: write suspend disabled\n"); | |
183 | } | |
184 | } | |
185 | #endif | |
186 | ||
187 | static void fixup_st_m28w320ct(struct mtd_info *mtd, void* param) | |
188 | { | |
189 | struct map_info *map = mtd->priv; | |
190 | struct cfi_private *cfi = map->fldrv_priv; | |
1f948b43 | 191 | |
1da177e4 LT |
192 | cfi->cfiq->BufWriteTimeoutTyp = 0; /* Not supported */ |
193 | cfi->cfiq->BufWriteTimeoutMax = 0; /* Not supported */ | |
194 | } | |
195 | ||
196 | static void fixup_st_m28w320cb(struct mtd_info *mtd, void* param) | |
197 | { | |
198 | struct map_info *map = mtd->priv; | |
199 | struct cfi_private *cfi = map->fldrv_priv; | |
1f948b43 | 200 | |
1da177e4 LT |
201 | /* Note this is done after the region info is endian swapped */ |
202 | cfi->cfiq->EraseRegionInfo[1] = | |
203 | (cfi->cfiq->EraseRegionInfo[1] & 0xffff0000) | 0x3e; | |
204 | }; | |
205 | ||
206 | static void fixup_use_point(struct mtd_info *mtd, void *param) | |
207 | { | |
208 | struct map_info *map = mtd->priv; | |
209 | if (!mtd->point && map_is_linear(map)) { | |
210 | mtd->point = cfi_intelext_point; | |
211 | mtd->unpoint = cfi_intelext_unpoint; | |
212 | } | |
213 | } | |
214 | ||
215 | static void fixup_use_write_buffers(struct mtd_info *mtd, void *param) | |
216 | { | |
217 | struct map_info *map = mtd->priv; | |
218 | struct cfi_private *cfi = map->fldrv_priv; | |
219 | if (cfi->cfiq->BufWriteTimeoutTyp) { | |
220 | printk(KERN_INFO "Using buffer write method\n" ); | |
221 | mtd->write = cfi_intelext_write_buffers; | |
e102d54a | 222 | mtd->writev = cfi_intelext_writev; |
1da177e4 LT |
223 | } |
224 | } | |
225 | ||
0ecbc81a RG |
226 | /* |
227 | * Some chips power-up with all sectors locked by default. | |
228 | */ | |
229 | static void fixup_use_powerup_lock(struct mtd_info *mtd, void *param) | |
230 | { | |
231 | printk(KERN_INFO "Using auto-unlock on power-up/resume\n" ); | |
232 | mtd->flags |= MTD_STUPID_LOCK; | |
233 | } | |
234 | ||
1da177e4 LT |
235 | static struct cfi_fixup cfi_fixup_table[] = { |
236 | #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE | |
1f948b43 | 237 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_intel_strataflash, NULL }, |
1da177e4 LT |
238 | #endif |
239 | #ifdef CMDSET0001_DISABLE_WRITE_SUSPEND | |
240 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_no_write_suspend, NULL }, | |
241 | #endif | |
242 | #if !FORCE_WORD_WRITE | |
243 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL }, | |
244 | #endif | |
245 | { CFI_MFR_ST, 0x00ba, /* M28W320CT */ fixup_st_m28w320ct, NULL }, | |
246 | { CFI_MFR_ST, 0x00bb, /* M28W320CB */ fixup_st_m28w320cb, NULL }, | |
0ecbc81a | 247 | { MANUFACTURER_INTEL, 0x891c, fixup_use_powerup_lock, NULL, }, |
1da177e4 LT |
248 | { 0, 0, NULL, NULL } |
249 | }; | |
250 | ||
251 | static struct cfi_fixup jedec_fixup_table[] = { | |
252 | { MANUFACTURER_INTEL, I82802AB, fixup_use_fwh_lock, NULL, }, | |
253 | { MANUFACTURER_INTEL, I82802AC, fixup_use_fwh_lock, NULL, }, | |
254 | { MANUFACTURER_ST, M50LPW080, fixup_use_fwh_lock, NULL, }, | |
255 | { 0, 0, NULL, NULL } | |
256 | }; | |
257 | static struct cfi_fixup fixup_table[] = { | |
258 | /* The CFI vendor ids and the JEDEC vendor IDs appear | |
259 | * to be common. It is like the devices id's are as | |
260 | * well. This table is to pick all cases where | |
261 | * we know that is the case. | |
262 | */ | |
263 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_point, NULL }, | |
264 | { 0, 0, NULL, NULL } | |
265 | }; | |
266 | ||
267 | static inline struct cfi_pri_intelext * | |
268 | read_pri_intelext(struct map_info *map, __u16 adr) | |
269 | { | |
270 | struct cfi_pri_intelext *extp; | |
271 | unsigned int extp_size = sizeof(*extp); | |
272 | ||
273 | again: | |
274 | extp = (struct cfi_pri_intelext *)cfi_read_pri(map, adr, extp_size, "Intel/Sharp"); | |
275 | if (!extp) | |
276 | return NULL; | |
277 | ||
d88f977b | 278 | if (extp->MajorVersion != '1' || |
638d9838 | 279 | (extp->MinorVersion < '0' || extp->MinorVersion > '4')) { |
d88f977b TP |
280 | printk(KERN_ERR " Unknown Intel/Sharp Extended Query " |
281 | "version %c.%c.\n", extp->MajorVersion, | |
282 | extp->MinorVersion); | |
283 | kfree(extp); | |
284 | return NULL; | |
285 | } | |
286 | ||
1da177e4 LT |
287 | /* Do some byteswapping if necessary */ |
288 | extp->FeatureSupport = le32_to_cpu(extp->FeatureSupport); | |
289 | extp->BlkStatusRegMask = le16_to_cpu(extp->BlkStatusRegMask); | |
290 | extp->ProtRegAddr = le16_to_cpu(extp->ProtRegAddr); | |
291 | ||
638d9838 | 292 | if (extp->MajorVersion == '1' && extp->MinorVersion >= '3') { |
1da177e4 LT |
293 | unsigned int extra_size = 0; |
294 | int nb_parts, i; | |
295 | ||
296 | /* Protection Register info */ | |
72b56a2d NP |
297 | extra_size += (extp->NumProtectionFields - 1) * |
298 | sizeof(struct cfi_intelext_otpinfo); | |
1da177e4 LT |
299 | |
300 | /* Burst Read info */ | |
6f6ed056 NP |
301 | extra_size += 2; |
302 | if (extp_size < sizeof(*extp) + extra_size) | |
303 | goto need_more; | |
304 | extra_size += extp->extra[extra_size-1]; | |
1da177e4 LT |
305 | |
306 | /* Number of hardware-partitions */ | |
307 | extra_size += 1; | |
308 | if (extp_size < sizeof(*extp) + extra_size) | |
309 | goto need_more; | |
310 | nb_parts = extp->extra[extra_size - 1]; | |
311 | ||
638d9838 NP |
312 | /* skip the sizeof(partregion) field in CFI 1.4 */ |
313 | if (extp->MinorVersion >= '4') | |
314 | extra_size += 2; | |
315 | ||
1da177e4 LT |
316 | for (i = 0; i < nb_parts; i++) { |
317 | struct cfi_intelext_regioninfo *rinfo; | |
318 | rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[extra_size]; | |
319 | extra_size += sizeof(*rinfo); | |
320 | if (extp_size < sizeof(*extp) + extra_size) | |
321 | goto need_more; | |
322 | rinfo->NumIdentPartitions=le16_to_cpu(rinfo->NumIdentPartitions); | |
323 | extra_size += (rinfo->NumBlockTypes - 1) | |
324 | * sizeof(struct cfi_intelext_blockinfo); | |
325 | } | |
326 | ||
638d9838 NP |
327 | if (extp->MinorVersion >= '4') |
328 | extra_size += sizeof(struct cfi_intelext_programming_regioninfo); | |
329 | ||
1da177e4 LT |
330 | if (extp_size < sizeof(*extp) + extra_size) { |
331 | need_more: | |
332 | extp_size = sizeof(*extp) + extra_size; | |
333 | kfree(extp); | |
334 | if (extp_size > 4096) { | |
335 | printk(KERN_ERR | |
336 | "%s: cfi_pri_intelext is too fat\n", | |
337 | __FUNCTION__); | |
338 | return NULL; | |
339 | } | |
340 | goto again; | |
341 | } | |
342 | } | |
1f948b43 | 343 | |
1da177e4 LT |
344 | return extp; |
345 | } | |
346 | ||
1da177e4 LT |
347 | struct mtd_info *cfi_cmdset_0001(struct map_info *map, int primary) |
348 | { | |
349 | struct cfi_private *cfi = map->fldrv_priv; | |
350 | struct mtd_info *mtd; | |
351 | int i; | |
352 | ||
95b93a0c | 353 | mtd = kzalloc(sizeof(*mtd), GFP_KERNEL); |
1da177e4 LT |
354 | if (!mtd) { |
355 | printk(KERN_ERR "Failed to allocate memory for MTD device\n"); | |
356 | return NULL; | |
357 | } | |
1da177e4 LT |
358 | mtd->priv = map; |
359 | mtd->type = MTD_NORFLASH; | |
360 | ||
361 | /* Fill in the default mtd operations */ | |
362 | mtd->erase = cfi_intelext_erase_varsize; | |
363 | mtd->read = cfi_intelext_read; | |
364 | mtd->write = cfi_intelext_write_words; | |
365 | mtd->sync = cfi_intelext_sync; | |
366 | mtd->lock = cfi_intelext_lock; | |
367 | mtd->unlock = cfi_intelext_unlock; | |
368 | mtd->suspend = cfi_intelext_suspend; | |
369 | mtd->resume = cfi_intelext_resume; | |
370 | mtd->flags = MTD_CAP_NORFLASH; | |
371 | mtd->name = map->name; | |
17ffc7ba | 372 | mtd->writesize = 1; |
963a6fb0 NP |
373 | |
374 | mtd->reboot_notifier.notifier_call = cfi_intelext_reboot; | |
375 | ||
1da177e4 | 376 | if (cfi->cfi_mode == CFI_MODE_CFI) { |
1f948b43 | 377 | /* |
1da177e4 LT |
378 | * It's a real CFI chip, not one for which the probe |
379 | * routine faked a CFI structure. So we read the feature | |
380 | * table from it. | |
381 | */ | |
382 | __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR; | |
383 | struct cfi_pri_intelext *extp; | |
384 | ||
385 | extp = read_pri_intelext(map, adr); | |
386 | if (!extp) { | |
387 | kfree(mtd); | |
388 | return NULL; | |
389 | } | |
390 | ||
391 | /* Install our own private info structure */ | |
1f948b43 | 392 | cfi->cmdset_priv = extp; |
1da177e4 LT |
393 | |
394 | cfi_fixup(mtd, cfi_fixup_table); | |
395 | ||
396 | #ifdef DEBUG_CFI_FEATURES | |
397 | /* Tell the user about it in lots of lovely detail */ | |
398 | cfi_tell_features(extp); | |
1f948b43 | 399 | #endif |
1da177e4 LT |
400 | |
401 | if(extp->SuspendCmdSupport & 1) { | |
402 | printk(KERN_NOTICE "cfi_cmdset_0001: Erase suspend on write enabled\n"); | |
403 | } | |
404 | } | |
405 | else if (cfi->cfi_mode == CFI_MODE_JEDEC) { | |
406 | /* Apply jedec specific fixups */ | |
407 | cfi_fixup(mtd, jedec_fixup_table); | |
408 | } | |
409 | /* Apply generic fixups */ | |
410 | cfi_fixup(mtd, fixup_table); | |
411 | ||
412 | for (i=0; i< cfi->numchips; i++) { | |
2a5bd596 DW |
413 | if (cfi->cfiq->WordWriteTimeoutTyp) |
414 | cfi->chips[i].word_write_time = | |
415 | 1<<cfi->cfiq->WordWriteTimeoutTyp; | |
416 | else | |
417 | cfi->chips[i].word_write_time = 50000; | |
418 | ||
419 | if (cfi->cfiq->BufWriteTimeoutTyp) | |
420 | cfi->chips[i].buffer_write_time = | |
421 | 1<<cfi->cfiq->BufWriteTimeoutTyp; | |
422 | /* No default; if it isn't specified, we won't use it */ | |
423 | ||
424 | if (cfi->cfiq->BlockEraseTimeoutTyp) | |
425 | cfi->chips[i].erase_time = | |
426 | 1000<<cfi->cfiq->BlockEraseTimeoutTyp; | |
427 | else | |
428 | cfi->chips[i].erase_time = 2000000; | |
429 | ||
1da177e4 | 430 | cfi->chips[i].ref_point_counter = 0; |
c314b6f1 | 431 | init_waitqueue_head(&(cfi->chips[i].wq)); |
1f948b43 | 432 | } |
1da177e4 LT |
433 | |
434 | map->fldrv = &cfi_intelext_chipdrv; | |
1f948b43 | 435 | |
1da177e4 LT |
436 | return cfi_intelext_setup(mtd); |
437 | } | |
a15bdeef DW |
438 | struct mtd_info *cfi_cmdset_0003(struct map_info *map, int primary) __attribute__((alias("cfi_cmdset_0001"))); |
439 | struct mtd_info *cfi_cmdset_0200(struct map_info *map, int primary) __attribute__((alias("cfi_cmdset_0001"))); | |
440 | EXPORT_SYMBOL_GPL(cfi_cmdset_0001); | |
441 | EXPORT_SYMBOL_GPL(cfi_cmdset_0003); | |
442 | EXPORT_SYMBOL_GPL(cfi_cmdset_0200); | |
1da177e4 LT |
443 | |
444 | static struct mtd_info *cfi_intelext_setup(struct mtd_info *mtd) | |
445 | { | |
446 | struct map_info *map = mtd->priv; | |
447 | struct cfi_private *cfi = map->fldrv_priv; | |
448 | unsigned long offset = 0; | |
449 | int i,j; | |
450 | unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave; | |
451 | ||
452 | //printk(KERN_DEBUG "number of CFI chips: %d\n", cfi->numchips); | |
453 | ||
454 | mtd->size = devsize * cfi->numchips; | |
455 | ||
456 | mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips; | |
1f948b43 | 457 | mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) |
1da177e4 | 458 | * mtd->numeraseregions, GFP_KERNEL); |
1f948b43 | 459 | if (!mtd->eraseregions) { |
1da177e4 LT |
460 | printk(KERN_ERR "Failed to allocate memory for MTD erase region info\n"); |
461 | goto setup_err; | |
462 | } | |
1f948b43 | 463 | |
1da177e4 LT |
464 | for (i=0; i<cfi->cfiq->NumEraseRegions; i++) { |
465 | unsigned long ernum, ersize; | |
466 | ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave; | |
467 | ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1; | |
468 | ||
469 | if (mtd->erasesize < ersize) { | |
470 | mtd->erasesize = ersize; | |
471 | } | |
472 | for (j=0; j<cfi->numchips; j++) { | |
473 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset; | |
474 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize; | |
475 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum; | |
0ecbc81a | 476 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].lockmap = kmalloc(ernum / 8 + 1, GFP_KERNEL); |
1da177e4 LT |
477 | } |
478 | offset += (ersize * ernum); | |
479 | } | |
480 | ||
481 | if (offset != devsize) { | |
482 | /* Argh */ | |
483 | printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize); | |
484 | goto setup_err; | |
485 | } | |
486 | ||
487 | for (i=0; i<mtd->numeraseregions;i++){ | |
4843653c | 488 | printk(KERN_DEBUG "erase region %d: offset=0x%x,size=0x%x,blocks=%d\n", |
1da177e4 LT |
489 | i,mtd->eraseregions[i].offset, |
490 | mtd->eraseregions[i].erasesize, | |
491 | mtd->eraseregions[i].numblocks); | |
492 | } | |
493 | ||
f77814dd | 494 | #ifdef CONFIG_MTD_OTP |
1da177e4 | 495 | mtd->read_fact_prot_reg = cfi_intelext_read_fact_prot_reg; |
f77814dd NP |
496 | mtd->read_user_prot_reg = cfi_intelext_read_user_prot_reg; |
497 | mtd->write_user_prot_reg = cfi_intelext_write_user_prot_reg; | |
498 | mtd->lock_user_prot_reg = cfi_intelext_lock_user_prot_reg; | |
499 | mtd->get_fact_prot_info = cfi_intelext_get_fact_prot_info; | |
500 | mtd->get_user_prot_info = cfi_intelext_get_user_prot_info; | |
1da177e4 LT |
501 | #endif |
502 | ||
503 | /* This function has the potential to distort the reality | |
504 | a bit and therefore should be called last. */ | |
505 | if (cfi_intelext_partition_fixup(mtd, &cfi) != 0) | |
506 | goto setup_err; | |
507 | ||
508 | __module_get(THIS_MODULE); | |
963a6fb0 | 509 | register_reboot_notifier(&mtd->reboot_notifier); |
1da177e4 LT |
510 | return mtd; |
511 | ||
512 | setup_err: | |
513 | if(mtd) { | |
fa671646 | 514 | kfree(mtd->eraseregions); |
1da177e4 LT |
515 | kfree(mtd); |
516 | } | |
517 | kfree(cfi->cmdset_priv); | |
518 | return NULL; | |
519 | } | |
520 | ||
521 | static int cfi_intelext_partition_fixup(struct mtd_info *mtd, | |
522 | struct cfi_private **pcfi) | |
523 | { | |
524 | struct map_info *map = mtd->priv; | |
525 | struct cfi_private *cfi = *pcfi; | |
526 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; | |
527 | ||
528 | /* | |
8f1a866f | 529 | * Probing of multi-partition flash chips. |
1da177e4 LT |
530 | * |
531 | * To support multiple partitions when available, we simply arrange | |
532 | * for each of them to have their own flchip structure even if they | |
533 | * are on the same physical chip. This means completely recreating | |
534 | * a new cfi_private structure right here which is a blatent code | |
535 | * layering violation, but this is still the least intrusive | |
536 | * arrangement at this point. This can be rearranged in the future | |
537 | * if someone feels motivated enough. --nico | |
538 | */ | |
638d9838 | 539 | if (extp && extp->MajorVersion == '1' && extp->MinorVersion >= '3' |
1da177e4 LT |
540 | && extp->FeatureSupport & (1 << 9)) { |
541 | struct cfi_private *newcfi; | |
542 | struct flchip *chip; | |
543 | struct flchip_shared *shared; | |
544 | int offs, numregions, numparts, partshift, numvirtchips, i, j; | |
545 | ||
546 | /* Protection Register info */ | |
72b56a2d NP |
547 | offs = (extp->NumProtectionFields - 1) * |
548 | sizeof(struct cfi_intelext_otpinfo); | |
1da177e4 LT |
549 | |
550 | /* Burst Read info */ | |
6f6ed056 | 551 | offs += extp->extra[offs+1]+2; |
1da177e4 LT |
552 | |
553 | /* Number of partition regions */ | |
554 | numregions = extp->extra[offs]; | |
555 | offs += 1; | |
556 | ||
638d9838 NP |
557 | /* skip the sizeof(partregion) field in CFI 1.4 */ |
558 | if (extp->MinorVersion >= '4') | |
559 | offs += 2; | |
560 | ||
1da177e4 LT |
561 | /* Number of hardware partitions */ |
562 | numparts = 0; | |
563 | for (i = 0; i < numregions; i++) { | |
564 | struct cfi_intelext_regioninfo *rinfo; | |
565 | rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[offs]; | |
566 | numparts += rinfo->NumIdentPartitions; | |
567 | offs += sizeof(*rinfo) | |
568 | + (rinfo->NumBlockTypes - 1) * | |
569 | sizeof(struct cfi_intelext_blockinfo); | |
570 | } | |
571 | ||
638d9838 NP |
572 | /* Programming Region info */ |
573 | if (extp->MinorVersion >= '4') { | |
574 | struct cfi_intelext_programming_regioninfo *prinfo; | |
575 | prinfo = (struct cfi_intelext_programming_regioninfo *)&extp->extra[offs]; | |
28318776 | 576 | mtd->writesize = cfi->interleave << prinfo->ProgRegShift; |
5fa43394 | 577 | mtd->flags &= ~MTD_BIT_WRITEABLE; |
638d9838 | 578 | printk(KERN_DEBUG "%s: program region size/ctrl_valid/ctrl_inval = %d/%d/%d\n", |
28318776 | 579 | map->name, mtd->writesize, |
d4160855 AB |
580 | cfi->interleave * prinfo->ControlValid, |
581 | cfi->interleave * prinfo->ControlInvalid); | |
638d9838 NP |
582 | } |
583 | ||
1da177e4 LT |
584 | /* |
585 | * All functions below currently rely on all chips having | |
586 | * the same geometry so we'll just assume that all hardware | |
587 | * partitions are of the same size too. | |
588 | */ | |
589 | partshift = cfi->chipshift - __ffs(numparts); | |
590 | ||
591 | if ((1 << partshift) < mtd->erasesize) { | |
592 | printk( KERN_ERR | |
593 | "%s: bad number of hw partitions (%d)\n", | |
594 | __FUNCTION__, numparts); | |
595 | return -EINVAL; | |
596 | } | |
597 | ||
598 | numvirtchips = cfi->numchips * numparts; | |
599 | newcfi = kmalloc(sizeof(struct cfi_private) + numvirtchips * sizeof(struct flchip), GFP_KERNEL); | |
600 | if (!newcfi) | |
601 | return -ENOMEM; | |
602 | shared = kmalloc(sizeof(struct flchip_shared) * cfi->numchips, GFP_KERNEL); | |
603 | if (!shared) { | |
604 | kfree(newcfi); | |
605 | return -ENOMEM; | |
606 | } | |
607 | memcpy(newcfi, cfi, sizeof(struct cfi_private)); | |
608 | newcfi->numchips = numvirtchips; | |
609 | newcfi->chipshift = partshift; | |
610 | ||
611 | chip = &newcfi->chips[0]; | |
612 | for (i = 0; i < cfi->numchips; i++) { | |
613 | shared[i].writing = shared[i].erasing = NULL; | |
614 | spin_lock_init(&shared[i].lock); | |
615 | for (j = 0; j < numparts; j++) { | |
616 | *chip = cfi->chips[i]; | |
617 | chip->start += j << partshift; | |
618 | chip->priv = &shared[i]; | |
619 | /* those should be reset too since | |
620 | they create memory references. */ | |
621 | init_waitqueue_head(&chip->wq); | |
622 | spin_lock_init(&chip->_spinlock); | |
623 | chip->mutex = &chip->_spinlock; | |
624 | chip++; | |
625 | } | |
626 | } | |
627 | ||
628 | printk(KERN_DEBUG "%s: %d set(s) of %d interleaved chips " | |
629 | "--> %d partitions of %d KiB\n", | |
630 | map->name, cfi->numchips, cfi->interleave, | |
631 | newcfi->numchips, 1<<(newcfi->chipshift-10)); | |
632 | ||
633 | map->fldrv_priv = newcfi; | |
634 | *pcfi = newcfi; | |
635 | kfree(cfi); | |
636 | } | |
637 | ||
638 | return 0; | |
639 | } | |
640 | ||
641 | /* | |
642 | * *********** CHIP ACCESS FUNCTIONS *********** | |
643 | */ | |
644 | ||
645 | static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode) | |
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); | |
650 | unsigned long timeo; | |
651 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; | |
652 | ||
653 | resettime: | |
654 | timeo = jiffies + HZ; | |
655 | retry: | |
c4a9f88d | 656 | if (chip->priv && (mode == FL_WRITING || mode == FL_ERASING || mode == FL_OTP_WRITE || mode == FL_SHUTDOWN)) { |
1da177e4 LT |
657 | /* |
658 | * OK. We have possibility for contension on the write/erase | |
659 | * operations which are global to the real chip and not per | |
660 | * partition. So let's fight it over in the partition which | |
661 | * currently has authority on the operation. | |
662 | * | |
663 | * The rules are as follows: | |
664 | * | |
665 | * - any write operation must own shared->writing. | |
666 | * | |
667 | * - any erase operation must own _both_ shared->writing and | |
668 | * shared->erasing. | |
669 | * | |
670 | * - contension arbitration is handled in the owner's context. | |
671 | * | |
8bc3b380 NP |
672 | * The 'shared' struct can be read and/or written only when |
673 | * its lock is taken. | |
1da177e4 LT |
674 | */ |
675 | struct flchip_shared *shared = chip->priv; | |
676 | struct flchip *contender; | |
677 | spin_lock(&shared->lock); | |
678 | contender = shared->writing; | |
679 | if (contender && contender != chip) { | |
680 | /* | |
681 | * The engine to perform desired operation on this | |
682 | * partition is already in use by someone else. | |
683 | * Let's fight over it in the context of the chip | |
684 | * currently using it. If it is possible to suspend, | |
685 | * that other partition will do just that, otherwise | |
686 | * it'll happily send us to sleep. In any case, when | |
687 | * get_chip returns success we're clear to go ahead. | |
688 | */ | |
689 | int ret = spin_trylock(contender->mutex); | |
690 | spin_unlock(&shared->lock); | |
691 | if (!ret) | |
692 | goto retry; | |
693 | spin_unlock(chip->mutex); | |
694 | ret = get_chip(map, contender, contender->start, mode); | |
695 | spin_lock(chip->mutex); | |
696 | if (ret) { | |
697 | spin_unlock(contender->mutex); | |
698 | return ret; | |
699 | } | |
700 | timeo = jiffies + HZ; | |
701 | spin_lock(&shared->lock); | |
8bc3b380 | 702 | spin_unlock(contender->mutex); |
1da177e4 LT |
703 | } |
704 | ||
705 | /* We now own it */ | |
706 | shared->writing = chip; | |
707 | if (mode == FL_ERASING) | |
708 | shared->erasing = chip; | |
1da177e4 LT |
709 | spin_unlock(&shared->lock); |
710 | } | |
711 | ||
712 | switch (chip->state) { | |
713 | ||
714 | case FL_STATUS: | |
715 | for (;;) { | |
716 | status = map_read(map, adr); | |
717 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
718 | break; | |
719 | ||
720 | /* At this point we're fine with write operations | |
721 | in other partitions as they don't conflict. */ | |
722 | if (chip->priv && map_word_andequal(map, status, status_PWS, status_PWS)) | |
723 | break; | |
724 | ||
725 | if (time_after(jiffies, timeo)) { | |
1f948b43 | 726 | printk(KERN_ERR "%s: Waiting for chip to be ready timed out. Status %lx\n", |
4843653c | 727 | map->name, status.x[0]); |
1da177e4 LT |
728 | return -EIO; |
729 | } | |
730 | spin_unlock(chip->mutex); | |
731 | cfi_udelay(1); | |
732 | spin_lock(chip->mutex); | |
733 | /* Someone else might have been playing with it. */ | |
734 | goto retry; | |
735 | } | |
1f948b43 | 736 | |
1da177e4 LT |
737 | case FL_READY: |
738 | case FL_CFI_QUERY: | |
739 | case FL_JEDEC_QUERY: | |
740 | return 0; | |
741 | ||
742 | case FL_ERASING: | |
743 | if (!cfip || | |
744 | !(cfip->FeatureSupport & 2) || | |
745 | !(mode == FL_READY || mode == FL_POINT || | |
746 | (mode == FL_WRITING && (cfip->SuspendCmdSupport & 1)))) | |
747 | goto sleep; | |
748 | ||
749 | ||
750 | /* Erase suspend */ | |
751 | map_write(map, CMD(0xB0), adr); | |
752 | ||
753 | /* If the flash has finished erasing, then 'erase suspend' | |
754 | * appears to make some (28F320) flash devices switch to | |
755 | * 'read' mode. Make sure that we switch to 'read status' | |
756 | * mode so we get the right data. --rmk | |
757 | */ | |
758 | map_write(map, CMD(0x70), adr); | |
759 | chip->oldstate = FL_ERASING; | |
760 | chip->state = FL_ERASE_SUSPENDING; | |
761 | chip->erase_suspended = 1; | |
762 | for (;;) { | |
763 | status = map_read(map, adr); | |
764 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
765 | break; | |
766 | ||
767 | if (time_after(jiffies, timeo)) { | |
768 | /* Urgh. Resume and pretend we weren't here. */ | |
769 | map_write(map, CMD(0xd0), adr); | |
770 | /* Make sure we're in 'read status' mode if it had finished */ | |
771 | map_write(map, CMD(0x70), adr); | |
772 | chip->state = FL_ERASING; | |
773 | chip->oldstate = FL_READY; | |
4843653c NP |
774 | printk(KERN_ERR "%s: Chip not ready after erase " |
775 | "suspended: status = 0x%lx\n", map->name, status.x[0]); | |
1da177e4 LT |
776 | return -EIO; |
777 | } | |
778 | ||
779 | spin_unlock(chip->mutex); | |
780 | cfi_udelay(1); | |
781 | spin_lock(chip->mutex); | |
782 | /* Nobody will touch it while it's in state FL_ERASE_SUSPENDING. | |
783 | So we can just loop here. */ | |
784 | } | |
785 | chip->state = FL_STATUS; | |
786 | return 0; | |
787 | ||
788 | case FL_XIP_WHILE_ERASING: | |
789 | if (mode != FL_READY && mode != FL_POINT && | |
790 | (mode != FL_WRITING || !cfip || !(cfip->SuspendCmdSupport&1))) | |
791 | goto sleep; | |
792 | chip->oldstate = chip->state; | |
793 | chip->state = FL_READY; | |
794 | return 0; | |
795 | ||
796 | case FL_POINT: | |
797 | /* Only if there's no operation suspended... */ | |
798 | if (mode == FL_READY && chip->oldstate == FL_READY) | |
799 | return 0; | |
800 | ||
c4a9f88d KH |
801 | case FL_SHUTDOWN: |
802 | /* The machine is rebooting now,so no one can get chip anymore */ | |
803 | return -EIO; | |
1da177e4 LT |
804 | default: |
805 | sleep: | |
806 | set_current_state(TASK_UNINTERRUPTIBLE); | |
807 | add_wait_queue(&chip->wq, &wait); | |
808 | spin_unlock(chip->mutex); | |
809 | schedule(); | |
810 | remove_wait_queue(&chip->wq, &wait); | |
811 | spin_lock(chip->mutex); | |
812 | goto resettime; | |
813 | } | |
814 | } | |
815 | ||
816 | static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr) | |
817 | { | |
818 | struct cfi_private *cfi = map->fldrv_priv; | |
819 | ||
820 | if (chip->priv) { | |
821 | struct flchip_shared *shared = chip->priv; | |
822 | spin_lock(&shared->lock); | |
823 | if (shared->writing == chip && chip->oldstate == FL_READY) { | |
824 | /* We own the ability to write, but we're done */ | |
825 | shared->writing = shared->erasing; | |
826 | if (shared->writing && shared->writing != chip) { | |
827 | /* give back ownership to who we loaned it from */ | |
828 | struct flchip *loaner = shared->writing; | |
829 | spin_lock(loaner->mutex); | |
830 | spin_unlock(&shared->lock); | |
831 | spin_unlock(chip->mutex); | |
832 | put_chip(map, loaner, loaner->start); | |
833 | spin_lock(chip->mutex); | |
834 | spin_unlock(loaner->mutex); | |
835 | wake_up(&chip->wq); | |
836 | return; | |
837 | } | |
838 | shared->erasing = NULL; | |
839 | shared->writing = NULL; | |
840 | } else if (shared->erasing == chip && shared->writing != chip) { | |
841 | /* | |
842 | * We own the ability to erase without the ability | |
843 | * to write, which means the erase was suspended | |
844 | * and some other partition is currently writing. | |
845 | * Don't let the switch below mess things up since | |
846 | * we don't have ownership to resume anything. | |
847 | */ | |
848 | spin_unlock(&shared->lock); | |
849 | wake_up(&chip->wq); | |
850 | return; | |
851 | } | |
852 | spin_unlock(&shared->lock); | |
853 | } | |
854 | ||
855 | switch(chip->oldstate) { | |
856 | case FL_ERASING: | |
857 | chip->state = chip->oldstate; | |
1f948b43 | 858 | /* What if one interleaved chip has finished and the |
1da177e4 | 859 | other hasn't? The old code would leave the finished |
1f948b43 | 860 | one in READY mode. That's bad, and caused -EROFS |
1da177e4 LT |
861 | errors to be returned from do_erase_oneblock because |
862 | that's the only bit it checked for at the time. | |
1f948b43 | 863 | As the state machine appears to explicitly allow |
1da177e4 | 864 | sending the 0x70 (Read Status) command to an erasing |
1f948b43 | 865 | chip and expecting it to be ignored, that's what we |
1da177e4 LT |
866 | do. */ |
867 | map_write(map, CMD(0xd0), adr); | |
868 | map_write(map, CMD(0x70), adr); | |
869 | chip->oldstate = FL_READY; | |
870 | chip->state = FL_ERASING; | |
871 | break; | |
872 | ||
873 | case FL_XIP_WHILE_ERASING: | |
874 | chip->state = chip->oldstate; | |
875 | chip->oldstate = FL_READY; | |
876 | break; | |
877 | ||
878 | case FL_READY: | |
879 | case FL_STATUS: | |
880 | case FL_JEDEC_QUERY: | |
881 | /* We should really make set_vpp() count, rather than doing this */ | |
882 | DISABLE_VPP(map); | |
883 | break; | |
884 | default: | |
4843653c | 885 | printk(KERN_ERR "%s: put_chip() called with oldstate %d!!\n", map->name, chip->oldstate); |
1da177e4 LT |
886 | } |
887 | wake_up(&chip->wq); | |
888 | } | |
889 | ||
890 | #ifdef CONFIG_MTD_XIP | |
891 | ||
892 | /* | |
893 | * No interrupt what so ever can be serviced while the flash isn't in array | |
894 | * mode. This is ensured by the xip_disable() and xip_enable() functions | |
895 | * enclosing any code path where the flash is known not to be in array mode. | |
896 | * And within a XIP disabled code path, only functions marked with __xipram | |
897 | * may be called and nothing else (it's a good thing to inspect generated | |
898 | * assembly to make sure inline functions were actually inlined and that gcc | |
899 | * didn't emit calls to its own support functions). Also configuring MTD CFI | |
900 | * support to a single buswidth and a single interleave is also recommended. | |
1da177e4 LT |
901 | */ |
902 | ||
903 | static void xip_disable(struct map_info *map, struct flchip *chip, | |
904 | unsigned long adr) | |
905 | { | |
906 | /* TODO: chips with no XIP use should ignore and return */ | |
907 | (void) map_read(map, adr); /* ensure mmu mapping is up to date */ | |
1da177e4 LT |
908 | local_irq_disable(); |
909 | } | |
910 | ||
911 | static void __xipram xip_enable(struct map_info *map, struct flchip *chip, | |
912 | unsigned long adr) | |
913 | { | |
914 | struct cfi_private *cfi = map->fldrv_priv; | |
915 | if (chip->state != FL_POINT && chip->state != FL_READY) { | |
916 | map_write(map, CMD(0xff), adr); | |
917 | chip->state = FL_READY; | |
918 | } | |
919 | (void) map_read(map, adr); | |
97f927a4 | 920 | xip_iprefetch(); |
1da177e4 | 921 | local_irq_enable(); |
1da177e4 LT |
922 | } |
923 | ||
924 | /* | |
925 | * When a delay is required for the flash operation to complete, the | |
c172471b NP |
926 | * xip_wait_for_operation() function is polling for both the given timeout |
927 | * and pending (but still masked) hardware interrupts. Whenever there is an | |
928 | * interrupt pending then the flash erase or write operation is suspended, | |
929 | * array mode restored and interrupts unmasked. Task scheduling might also | |
930 | * happen at that point. The CPU eventually returns from the interrupt or | |
931 | * the call to schedule() and the suspended flash operation is resumed for | |
932 | * the remaining of the delay period. | |
1da177e4 LT |
933 | * |
934 | * Warning: this function _will_ fool interrupt latency tracing tools. | |
935 | */ | |
936 | ||
c172471b NP |
937 | static int __xipram xip_wait_for_operation( |
938 | struct map_info *map, struct flchip *chip, | |
46a1652c | 939 | unsigned long adr, unsigned int chip_op_time ) |
1da177e4 LT |
940 | { |
941 | struct cfi_private *cfi = map->fldrv_priv; | |
942 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; | |
943 | map_word status, OK = CMD(0x80); | |
c172471b | 944 | unsigned long usec, suspended, start, done; |
1da177e4 LT |
945 | flstate_t oldstate, newstate; |
946 | ||
c172471b | 947 | start = xip_currtime(); |
46a1652c | 948 | usec = chip_op_time * 8; |
c172471b NP |
949 | if (usec == 0) |
950 | usec = 500000; | |
951 | done = 0; | |
952 | ||
1da177e4 LT |
953 | do { |
954 | cpu_relax(); | |
955 | if (xip_irqpending() && cfip && | |
956 | ((chip->state == FL_ERASING && (cfip->FeatureSupport&2)) || | |
957 | (chip->state == FL_WRITING && (cfip->FeatureSupport&4))) && | |
958 | (cfi_interleave_is_1(cfi) || chip->oldstate == FL_READY)) { | |
959 | /* | |
960 | * Let's suspend the erase or write operation when | |
961 | * supported. Note that we currently don't try to | |
962 | * suspend interleaved chips if there is already | |
963 | * another operation suspended (imagine what happens | |
964 | * when one chip was already done with the current | |
965 | * operation while another chip suspended it, then | |
966 | * we resume the whole thing at once). Yes, it | |
967 | * can happen! | |
968 | */ | |
c172471b | 969 | usec -= done; |
1da177e4 LT |
970 | map_write(map, CMD(0xb0), adr); |
971 | map_write(map, CMD(0x70), adr); | |
1da177e4 LT |
972 | suspended = xip_currtime(); |
973 | do { | |
974 | if (xip_elapsed_since(suspended) > 100000) { | |
975 | /* | |
976 | * The chip doesn't want to suspend | |
977 | * after waiting for 100 msecs. | |
978 | * This is a critical error but there | |
979 | * is not much we can do here. | |
980 | */ | |
c172471b | 981 | return -EIO; |
1da177e4 LT |
982 | } |
983 | status = map_read(map, adr); | |
984 | } while (!map_word_andequal(map, status, OK, OK)); | |
985 | ||
986 | /* Suspend succeeded */ | |
987 | oldstate = chip->state; | |
988 | if (oldstate == FL_ERASING) { | |
989 | if (!map_word_bitsset(map, status, CMD(0x40))) | |
990 | break; | |
991 | newstate = FL_XIP_WHILE_ERASING; | |
992 | chip->erase_suspended = 1; | |
993 | } else { | |
994 | if (!map_word_bitsset(map, status, CMD(0x04))) | |
995 | break; | |
996 | newstate = FL_XIP_WHILE_WRITING; | |
997 | chip->write_suspended = 1; | |
998 | } | |
999 | chip->state = newstate; | |
1000 | map_write(map, CMD(0xff), adr); | |
1001 | (void) map_read(map, adr); | |
1002 | asm volatile (".rep 8; nop; .endr"); | |
1003 | local_irq_enable(); | |
6da70124 | 1004 | spin_unlock(chip->mutex); |
1da177e4 LT |
1005 | asm volatile (".rep 8; nop; .endr"); |
1006 | cond_resched(); | |
1007 | ||
1008 | /* | |
1009 | * We're back. However someone else might have | |
1010 | * decided to go write to the chip if we are in | |
1011 | * a suspended erase state. If so let's wait | |
1012 | * until it's done. | |
1013 | */ | |
6da70124 | 1014 | spin_lock(chip->mutex); |
1da177e4 LT |
1015 | while (chip->state != newstate) { |
1016 | DECLARE_WAITQUEUE(wait, current); | |
1017 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1018 | add_wait_queue(&chip->wq, &wait); | |
6da70124 | 1019 | spin_unlock(chip->mutex); |
1da177e4 LT |
1020 | schedule(); |
1021 | remove_wait_queue(&chip->wq, &wait); | |
6da70124 | 1022 | spin_lock(chip->mutex); |
1da177e4 LT |
1023 | } |
1024 | /* Disallow XIP again */ | |
1025 | local_irq_disable(); | |
1026 | ||
1027 | /* Resume the write or erase operation */ | |
1028 | map_write(map, CMD(0xd0), adr); | |
1029 | map_write(map, CMD(0x70), adr); | |
1030 | chip->state = oldstate; | |
1031 | start = xip_currtime(); | |
1032 | } else if (usec >= 1000000/HZ) { | |
1033 | /* | |
1034 | * Try to save on CPU power when waiting delay | |
1035 | * is at least a system timer tick period. | |
1036 | * No need to be extremely accurate here. | |
1037 | */ | |
1038 | xip_cpu_idle(); | |
1039 | } | |
1040 | status = map_read(map, adr); | |
c172471b | 1041 | done = xip_elapsed_since(start); |
1da177e4 | 1042 | } while (!map_word_andequal(map, status, OK, OK) |
c172471b | 1043 | && done < usec); |
1da177e4 | 1044 | |
c172471b NP |
1045 | return (done >= usec) ? -ETIME : 0; |
1046 | } | |
1da177e4 LT |
1047 | |
1048 | /* | |
1049 | * The INVALIDATE_CACHED_RANGE() macro is normally used in parallel while | |
1050 | * the flash is actively programming or erasing since we have to poll for | |
1051 | * the operation to complete anyway. We can't do that in a generic way with | |
6da70124 | 1052 | * a XIP setup so do it before the actual flash operation in this case |
c172471b | 1053 | * and stub it out from INVAL_CACHE_AND_WAIT. |
1da177e4 | 1054 | */ |
6da70124 NP |
1055 | #define XIP_INVAL_CACHED_RANGE(map, from, size) \ |
1056 | INVALIDATE_CACHED_RANGE(map, from, size) | |
1057 | ||
46a1652c AK |
1058 | #define INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, inval_adr, inval_len, usec) \ |
1059 | xip_wait_for_operation(map, chip, cmd_adr, usec) | |
1da177e4 LT |
1060 | |
1061 | #else | |
1062 | ||
1063 | #define xip_disable(map, chip, adr) | |
1064 | #define xip_enable(map, chip, adr) | |
1da177e4 | 1065 | #define XIP_INVAL_CACHED_RANGE(x...) |
c172471b NP |
1066 | #define INVAL_CACHE_AND_WAIT inval_cache_and_wait_for_operation |
1067 | ||
1068 | static int inval_cache_and_wait_for_operation( | |
1069 | struct map_info *map, struct flchip *chip, | |
1070 | unsigned long cmd_adr, unsigned long inval_adr, int inval_len, | |
46a1652c | 1071 | unsigned int chip_op_time) |
c172471b NP |
1072 | { |
1073 | struct cfi_private *cfi = map->fldrv_priv; | |
1074 | map_word status, status_OK = CMD(0x80); | |
46a1652c AK |
1075 | int chip_state = chip->state; |
1076 | unsigned int timeo, sleep_time; | |
c172471b NP |
1077 | |
1078 | spin_unlock(chip->mutex); | |
1079 | if (inval_len) | |
1080 | INVALIDATE_CACHED_RANGE(map, inval_adr, inval_len); | |
c172471b NP |
1081 | spin_lock(chip->mutex); |
1082 | ||
46a1652c AK |
1083 | /* set our timeout to 8 times the expected delay */ |
1084 | timeo = chip_op_time * 8; | |
1085 | if (!timeo) | |
1086 | timeo = 500000; | |
1087 | sleep_time = chip_op_time / 2; | |
c172471b | 1088 | |
c172471b | 1089 | for (;;) { |
c172471b NP |
1090 | status = map_read(map, cmd_adr); |
1091 | if (map_word_andequal(map, status, status_OK, status_OK)) | |
1092 | break; | |
1da177e4 | 1093 | |
46a1652c | 1094 | if (!timeo) { |
c172471b NP |
1095 | map_write(map, CMD(0x70), cmd_adr); |
1096 | chip->state = FL_STATUS; | |
1097 | return -ETIME; | |
1098 | } | |
1099 | ||
46a1652c | 1100 | /* OK Still waiting. Drop the lock, wait a while and retry. */ |
c172471b | 1101 | spin_unlock(chip->mutex); |
46a1652c AK |
1102 | if (sleep_time >= 1000000/HZ) { |
1103 | /* | |
1104 | * Half of the normal delay still remaining | |
1105 | * can be performed with a sleeping delay instead | |
1106 | * of busy waiting. | |
1107 | */ | |
1108 | msleep(sleep_time/1000); | |
1109 | timeo -= sleep_time; | |
1110 | sleep_time = 1000000/HZ; | |
1111 | } else { | |
1112 | udelay(1); | |
1113 | cond_resched(); | |
1114 | timeo--; | |
1115 | } | |
c172471b | 1116 | spin_lock(chip->mutex); |
c172471b | 1117 | |
967bf623 | 1118 | while (chip->state != chip_state) { |
46a1652c AK |
1119 | /* Someone's suspended the operation: sleep */ |
1120 | DECLARE_WAITQUEUE(wait, current); | |
1121 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1122 | add_wait_queue(&chip->wq, &wait); | |
1123 | spin_unlock(chip->mutex); | |
1124 | schedule(); | |
1125 | remove_wait_queue(&chip->wq, &wait); | |
1126 | spin_lock(chip->mutex); | |
1127 | } | |
1128 | } | |
c172471b NP |
1129 | |
1130 | /* Done and happy. */ | |
1131 | chip->state = FL_STATUS; | |
1132 | return 0; | |
1133 | } | |
6da70124 | 1134 | |
1da177e4 LT |
1135 | #endif |
1136 | ||
c172471b | 1137 | #define WAIT_TIMEOUT(map, chip, adr, udelay) \ |
46a1652c | 1138 | INVAL_CACHE_AND_WAIT(map, chip, adr, 0, 0, udelay); |
c172471b NP |
1139 | |
1140 | ||
1da177e4 LT |
1141 | static int do_point_onechip (struct map_info *map, struct flchip *chip, loff_t adr, size_t len) |
1142 | { | |
1143 | unsigned long cmd_addr; | |
1144 | struct cfi_private *cfi = map->fldrv_priv; | |
1145 | int ret = 0; | |
1146 | ||
1147 | adr += chip->start; | |
1148 | ||
1f948b43 TG |
1149 | /* Ensure cmd read/writes are aligned. */ |
1150 | cmd_addr = adr & ~(map_bankwidth(map)-1); | |
1da177e4 LT |
1151 | |
1152 | spin_lock(chip->mutex); | |
1153 | ||
1154 | ret = get_chip(map, chip, cmd_addr, FL_POINT); | |
1155 | ||
1156 | if (!ret) { | |
1157 | if (chip->state != FL_POINT && chip->state != FL_READY) | |
1158 | map_write(map, CMD(0xff), cmd_addr); | |
1159 | ||
1160 | chip->state = FL_POINT; | |
1161 | chip->ref_point_counter++; | |
1162 | } | |
1163 | spin_unlock(chip->mutex); | |
1164 | ||
1165 | return ret; | |
1166 | } | |
1167 | ||
1168 | static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf) | |
1169 | { | |
1170 | struct map_info *map = mtd->priv; | |
1171 | struct cfi_private *cfi = map->fldrv_priv; | |
097f2576 | 1172 | unsigned long ofs, last_end = 0; |
1da177e4 LT |
1173 | int chipnum; |
1174 | int ret = 0; | |
1175 | ||
1176 | if (!map->virt || (from + len > mtd->size)) | |
1177 | return -EINVAL; | |
1f948b43 | 1178 | |
1da177e4 LT |
1179 | /* Now lock the chip(s) to POINT state */ |
1180 | ||
1181 | /* ofs: offset within the first chip that the first read should start */ | |
1182 | chipnum = (from >> cfi->chipshift); | |
1183 | ofs = from - (chipnum << cfi->chipshift); | |
1184 | ||
097f2576 AL |
1185 | *mtdbuf = (void *)map->virt + cfi->chips[chipnum].start + ofs; |
1186 | *retlen = 0; | |
1187 | ||
1da177e4 LT |
1188 | while (len) { |
1189 | unsigned long thislen; | |
1190 | ||
1191 | if (chipnum >= cfi->numchips) | |
1192 | break; | |
1193 | ||
097f2576 AL |
1194 | /* We cannot point across chips that are virtually disjoint */ |
1195 | if (!last_end) | |
1196 | last_end = cfi->chips[chipnum].start; | |
1197 | else if (cfi->chips[chipnum].start != last_end) | |
1198 | break; | |
1199 | ||
1da177e4 LT |
1200 | if ((len + ofs -1) >> cfi->chipshift) |
1201 | thislen = (1<<cfi->chipshift) - ofs; | |
1202 | else | |
1203 | thislen = len; | |
1204 | ||
1205 | ret = do_point_onechip(map, &cfi->chips[chipnum], ofs, thislen); | |
1206 | if (ret) | |
1207 | break; | |
1208 | ||
1209 | *retlen += thislen; | |
1210 | len -= thislen; | |
1f948b43 | 1211 | |
1da177e4 | 1212 | ofs = 0; |
097f2576 | 1213 | last_end += 1 << cfi->chipshift; |
1da177e4 LT |
1214 | chipnum++; |
1215 | } | |
1216 | return 0; | |
1217 | } | |
1218 | ||
1219 | static void cfi_intelext_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, size_t len) | |
1220 | { | |
1221 | struct map_info *map = mtd->priv; | |
1222 | struct cfi_private *cfi = map->fldrv_priv; | |
1223 | unsigned long ofs; | |
1224 | int chipnum; | |
1225 | ||
1226 | /* Now unlock the chip(s) POINT state */ | |
1227 | ||
1228 | /* ofs: offset within the first chip that the first read should start */ | |
1229 | chipnum = (from >> cfi->chipshift); | |
1230 | ofs = from - (chipnum << cfi->chipshift); | |
1231 | ||
1232 | while (len) { | |
1233 | unsigned long thislen; | |
1234 | struct flchip *chip; | |
1235 | ||
1236 | chip = &cfi->chips[chipnum]; | |
1237 | if (chipnum >= cfi->numchips) | |
1238 | break; | |
1239 | ||
1240 | if ((len + ofs -1) >> cfi->chipshift) | |
1241 | thislen = (1<<cfi->chipshift) - ofs; | |
1242 | else | |
1243 | thislen = len; | |
1244 | ||
1245 | spin_lock(chip->mutex); | |
1246 | if (chip->state == FL_POINT) { | |
1247 | chip->ref_point_counter--; | |
1248 | if(chip->ref_point_counter == 0) | |
1249 | chip->state = FL_READY; | |
1250 | } else | |
4843653c | 1251 | printk(KERN_ERR "%s: Warning: unpoint called on non pointed region\n", map->name); /* Should this give an error? */ |
1da177e4 LT |
1252 | |
1253 | put_chip(map, chip, chip->start); | |
1254 | spin_unlock(chip->mutex); | |
1255 | ||
1256 | len -= thislen; | |
1257 | ofs = 0; | |
1258 | chipnum++; | |
1259 | } | |
1260 | } | |
1261 | ||
1262 | static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) | |
1263 | { | |
1264 | unsigned long cmd_addr; | |
1265 | struct cfi_private *cfi = map->fldrv_priv; | |
1266 | int ret; | |
1267 | ||
1268 | adr += chip->start; | |
1269 | ||
1f948b43 TG |
1270 | /* Ensure cmd read/writes are aligned. */ |
1271 | cmd_addr = adr & ~(map_bankwidth(map)-1); | |
1da177e4 LT |
1272 | |
1273 | spin_lock(chip->mutex); | |
1274 | ret = get_chip(map, chip, cmd_addr, FL_READY); | |
1275 | if (ret) { | |
1276 | spin_unlock(chip->mutex); | |
1277 | return ret; | |
1278 | } | |
1279 | ||
1280 | if (chip->state != FL_POINT && chip->state != FL_READY) { | |
1281 | map_write(map, CMD(0xff), cmd_addr); | |
1282 | ||
1283 | chip->state = FL_READY; | |
1284 | } | |
1285 | ||
1286 | map_copy_from(map, buf, adr, len); | |
1287 | ||
1288 | put_chip(map, chip, cmd_addr); | |
1289 | ||
1290 | spin_unlock(chip->mutex); | |
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | static int cfi_intelext_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) | |
1295 | { | |
1296 | struct map_info *map = mtd->priv; | |
1297 | struct cfi_private *cfi = map->fldrv_priv; | |
1298 | unsigned long ofs; | |
1299 | int chipnum; | |
1300 | int ret = 0; | |
1301 | ||
1302 | /* ofs: offset within the first chip that the first read should start */ | |
1303 | chipnum = (from >> cfi->chipshift); | |
1304 | ofs = from - (chipnum << cfi->chipshift); | |
1305 | ||
1306 | *retlen = 0; | |
1307 | ||
1308 | while (len) { | |
1309 | unsigned long thislen; | |
1310 | ||
1311 | if (chipnum >= cfi->numchips) | |
1312 | break; | |
1313 | ||
1314 | if ((len + ofs -1) >> cfi->chipshift) | |
1315 | thislen = (1<<cfi->chipshift) - ofs; | |
1316 | else | |
1317 | thislen = len; | |
1318 | ||
1319 | ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); | |
1320 | if (ret) | |
1321 | break; | |
1322 | ||
1323 | *retlen += thislen; | |
1324 | len -= thislen; | |
1325 | buf += thislen; | |
1f948b43 | 1326 | |
1da177e4 LT |
1327 | ofs = 0; |
1328 | chipnum++; | |
1329 | } | |
1330 | return ret; | |
1331 | } | |
1332 | ||
1da177e4 | 1333 | static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, |
f77814dd | 1334 | unsigned long adr, map_word datum, int mode) |
1da177e4 LT |
1335 | { |
1336 | struct cfi_private *cfi = map->fldrv_priv; | |
c172471b NP |
1337 | map_word status, write_cmd; |
1338 | int ret=0; | |
1da177e4 LT |
1339 | |
1340 | adr += chip->start; | |
1341 | ||
f77814dd | 1342 | switch (mode) { |
638d9838 NP |
1343 | case FL_WRITING: |
1344 | write_cmd = (cfi->cfiq->P_ID != 0x0200) ? CMD(0x40) : CMD(0x41); | |
1345 | break; | |
1346 | case FL_OTP_WRITE: | |
1347 | write_cmd = CMD(0xc0); | |
1348 | break; | |
1349 | default: | |
1350 | return -EINVAL; | |
f77814dd | 1351 | } |
1da177e4 LT |
1352 | |
1353 | spin_lock(chip->mutex); | |
f77814dd | 1354 | ret = get_chip(map, chip, adr, mode); |
1da177e4 LT |
1355 | if (ret) { |
1356 | spin_unlock(chip->mutex); | |
1357 | return ret; | |
1358 | } | |
1359 | ||
1360 | XIP_INVAL_CACHED_RANGE(map, adr, map_bankwidth(map)); | |
1361 | ENABLE_VPP(map); | |
1362 | xip_disable(map, chip, adr); | |
f77814dd | 1363 | map_write(map, write_cmd, adr); |
1da177e4 | 1364 | map_write(map, datum, adr); |
f77814dd | 1365 | chip->state = mode; |
1da177e4 | 1366 | |
c172471b NP |
1367 | ret = INVAL_CACHE_AND_WAIT(map, chip, adr, |
1368 | adr, map_bankwidth(map), | |
46a1652c | 1369 | chip->word_write_time); |
c172471b NP |
1370 | if (ret) { |
1371 | xip_enable(map, chip, adr); | |
1372 | printk(KERN_ERR "%s: word write error (status timeout)\n", map->name); | |
1373 | goto out; | |
1da177e4 | 1374 | } |
1da177e4 | 1375 | |
4843653c | 1376 | /* check for errors */ |
c172471b | 1377 | status = map_read(map, adr); |
4843653c NP |
1378 | if (map_word_bitsset(map, status, CMD(0x1a))) { |
1379 | unsigned long chipstatus = MERGESTATUS(status); | |
1380 | ||
1381 | /* reset status */ | |
1da177e4 | 1382 | map_write(map, CMD(0x50), adr); |
1da177e4 | 1383 | map_write(map, CMD(0x70), adr); |
4843653c NP |
1384 | xip_enable(map, chip, adr); |
1385 | ||
1386 | if (chipstatus & 0x02) { | |
1387 | ret = -EROFS; | |
1388 | } else if (chipstatus & 0x08) { | |
1389 | printk(KERN_ERR "%s: word write error (bad VPP)\n", map->name); | |
1390 | ret = -EIO; | |
1391 | } else { | |
1392 | printk(KERN_ERR "%s: word write error (status 0x%lx)\n", map->name, chipstatus); | |
1393 | ret = -EINVAL; | |
1394 | } | |
1395 | ||
1396 | goto out; | |
1da177e4 LT |
1397 | } |
1398 | ||
1399 | xip_enable(map, chip, adr); | |
1400 | out: put_chip(map, chip, adr); | |
1401 | spin_unlock(chip->mutex); | |
1da177e4 LT |
1402 | return ret; |
1403 | } | |
1404 | ||
1405 | ||
1406 | static int cfi_intelext_write_words (struct mtd_info *mtd, loff_t to , size_t len, size_t *retlen, const u_char *buf) | |
1407 | { | |
1408 | struct map_info *map = mtd->priv; | |
1409 | struct cfi_private *cfi = map->fldrv_priv; | |
1410 | int ret = 0; | |
1411 | int chipnum; | |
1412 | unsigned long ofs; | |
1413 | ||
1414 | *retlen = 0; | |
1415 | if (!len) | |
1416 | return 0; | |
1417 | ||
1418 | chipnum = to >> cfi->chipshift; | |
1419 | ofs = to - (chipnum << cfi->chipshift); | |
1420 | ||
1421 | /* If it's not bus-aligned, do the first byte write */ | |
1422 | if (ofs & (map_bankwidth(map)-1)) { | |
1423 | unsigned long bus_ofs = ofs & ~(map_bankwidth(map)-1); | |
1424 | int gap = ofs - bus_ofs; | |
1425 | int n; | |
1426 | map_word datum; | |
1427 | ||
1428 | n = min_t(int, len, map_bankwidth(map)-gap); | |
1429 | datum = map_word_ff(map); | |
1430 | datum = map_word_load_partial(map, datum, buf, gap, n); | |
1431 | ||
1432 | ret = do_write_oneword(map, &cfi->chips[chipnum], | |
f77814dd | 1433 | bus_ofs, datum, FL_WRITING); |
1f948b43 | 1434 | if (ret) |
1da177e4 LT |
1435 | return ret; |
1436 | ||
1437 | len -= n; | |
1438 | ofs += n; | |
1439 | buf += n; | |
1440 | (*retlen) += n; | |
1441 | ||
1442 | if (ofs >> cfi->chipshift) { | |
1f948b43 | 1443 | chipnum ++; |
1da177e4 LT |
1444 | ofs = 0; |
1445 | if (chipnum == cfi->numchips) | |
1446 | return 0; | |
1447 | } | |
1448 | } | |
1f948b43 | 1449 | |
1da177e4 LT |
1450 | while(len >= map_bankwidth(map)) { |
1451 | map_word datum = map_word_load(map, buf); | |
1452 | ||
1453 | ret = do_write_oneword(map, &cfi->chips[chipnum], | |
f77814dd | 1454 | ofs, datum, FL_WRITING); |
1da177e4 LT |
1455 | if (ret) |
1456 | return ret; | |
1457 | ||
1458 | ofs += map_bankwidth(map); | |
1459 | buf += map_bankwidth(map); | |
1460 | (*retlen) += map_bankwidth(map); | |
1461 | len -= map_bankwidth(map); | |
1462 | ||
1463 | if (ofs >> cfi->chipshift) { | |
1f948b43 | 1464 | chipnum ++; |
1da177e4 LT |
1465 | ofs = 0; |
1466 | if (chipnum == cfi->numchips) | |
1467 | return 0; | |
1468 | } | |
1469 | } | |
1470 | ||
1471 | if (len & (map_bankwidth(map)-1)) { | |
1472 | map_word datum; | |
1473 | ||
1474 | datum = map_word_ff(map); | |
1475 | datum = map_word_load_partial(map, datum, buf, 0, len); | |
1476 | ||
1477 | ret = do_write_oneword(map, &cfi->chips[chipnum], | |
f77814dd | 1478 | ofs, datum, FL_WRITING); |
1f948b43 | 1479 | if (ret) |
1da177e4 | 1480 | return ret; |
1f948b43 | 1481 | |
1da177e4 LT |
1482 | (*retlen) += len; |
1483 | } | |
1484 | ||
1485 | return 0; | |
1486 | } | |
1487 | ||
1488 | ||
1f948b43 | 1489 | static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, |
e102d54a NP |
1490 | unsigned long adr, const struct kvec **pvec, |
1491 | unsigned long *pvec_seek, int len) | |
1da177e4 LT |
1492 | { |
1493 | struct cfi_private *cfi = map->fldrv_priv; | |
c172471b NP |
1494 | map_word status, write_cmd, datum; |
1495 | unsigned long cmd_adr; | |
1496 | int ret, wbufsize, word_gap, words; | |
e102d54a NP |
1497 | const struct kvec *vec; |
1498 | unsigned long vec_seek; | |
1da177e4 LT |
1499 | |
1500 | wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; | |
1501 | adr += chip->start; | |
1502 | cmd_adr = adr & ~(wbufsize-1); | |
638d9838 | 1503 | |
1da177e4 | 1504 | /* Let's determine this according to the interleave only once */ |
638d9838 | 1505 | write_cmd = (cfi->cfiq->P_ID != 0x0200) ? CMD(0xe8) : CMD(0xe9); |
1da177e4 LT |
1506 | |
1507 | spin_lock(chip->mutex); | |
1508 | ret = get_chip(map, chip, cmd_adr, FL_WRITING); | |
1509 | if (ret) { | |
1510 | spin_unlock(chip->mutex); | |
1511 | return ret; | |
1512 | } | |
1513 | ||
1514 | XIP_INVAL_CACHED_RANGE(map, adr, len); | |
1515 | ENABLE_VPP(map); | |
1516 | xip_disable(map, chip, cmd_adr); | |
1517 | ||
151e7659 | 1518 | /* §4.8 of the 28FxxxJ3A datasheet says "Any time SR.4 and/or SR.5 is set |
1f948b43 | 1519 | [...], the device will not accept any more Write to Buffer commands". |
1da177e4 LT |
1520 | So we must check here and reset those bits if they're set. Otherwise |
1521 | we're just pissing in the wind */ | |
6e7a6809 | 1522 | if (chip->state != FL_STATUS) { |
1da177e4 | 1523 | map_write(map, CMD(0x70), cmd_adr); |
6e7a6809 NP |
1524 | chip->state = FL_STATUS; |
1525 | } | |
1da177e4 LT |
1526 | status = map_read(map, cmd_adr); |
1527 | if (map_word_bitsset(map, status, CMD(0x30))) { | |
1528 | xip_enable(map, chip, cmd_adr); | |
1529 | printk(KERN_WARNING "SR.4 or SR.5 bits set in buffer write (status %lx). Clearing.\n", status.x[0]); | |
1530 | xip_disable(map, chip, cmd_adr); | |
1531 | map_write(map, CMD(0x50), cmd_adr); | |
1532 | map_write(map, CMD(0x70), cmd_adr); | |
1533 | } | |
1534 | ||
1535 | chip->state = FL_WRITING_TO_BUFFER; | |
c172471b NP |
1536 | map_write(map, write_cmd, cmd_adr); |
1537 | ret = WAIT_TIMEOUT(map, chip, cmd_adr, 0); | |
1538 | if (ret) { | |
1539 | /* Argh. Not ready for write to buffer */ | |
1540 | map_word Xstatus = map_read(map, cmd_adr); | |
1541 | map_write(map, CMD(0x70), cmd_adr); | |
1542 | chip->state = FL_STATUS; | |
1da177e4 | 1543 | status = map_read(map, cmd_adr); |
c172471b NP |
1544 | map_write(map, CMD(0x50), cmd_adr); |
1545 | map_write(map, CMD(0x70), cmd_adr); | |
1546 | xip_enable(map, chip, cmd_adr); | |
1547 | printk(KERN_ERR "%s: Chip not ready for buffer write. Xstatus = %lx, status = %lx\n", | |
1548 | map->name, Xstatus.x[0], status.x[0]); | |
1549 | goto out; | |
1da177e4 LT |
1550 | } |
1551 | ||
e102d54a NP |
1552 | /* Figure out the number of words to write */ |
1553 | word_gap = (-adr & (map_bankwidth(map)-1)); | |
1554 | words = (len - word_gap + map_bankwidth(map) - 1) / map_bankwidth(map); | |
1555 | if (!word_gap) { | |
1556 | words--; | |
1557 | } else { | |
1558 | word_gap = map_bankwidth(map) - word_gap; | |
1559 | adr -= word_gap; | |
1560 | datum = map_word_ff(map); | |
1561 | } | |
1562 | ||
1da177e4 | 1563 | /* Write length of data to come */ |
e102d54a | 1564 | map_write(map, CMD(words), cmd_adr ); |
1da177e4 LT |
1565 | |
1566 | /* Write data */ | |
e102d54a NP |
1567 | vec = *pvec; |
1568 | vec_seek = *pvec_seek; | |
1569 | do { | |
1570 | int n = map_bankwidth(map) - word_gap; | |
1571 | if (n > vec->iov_len - vec_seek) | |
1572 | n = vec->iov_len - vec_seek; | |
1573 | if (n > len) | |
1574 | n = len; | |
1da177e4 | 1575 | |
e102d54a NP |
1576 | if (!word_gap && len < map_bankwidth(map)) |
1577 | datum = map_word_ff(map); | |
1da177e4 | 1578 | |
e102d54a | 1579 | datum = map_word_load_partial(map, datum, |
1f948b43 | 1580 | vec->iov_base + vec_seek, |
e102d54a | 1581 | word_gap, n); |
1da177e4 | 1582 | |
e102d54a NP |
1583 | len -= n; |
1584 | word_gap += n; | |
1585 | if (!len || word_gap == map_bankwidth(map)) { | |
1586 | map_write(map, datum, adr); | |
1587 | adr += map_bankwidth(map); | |
1588 | word_gap = 0; | |
1589 | } | |
1da177e4 | 1590 | |
e102d54a NP |
1591 | vec_seek += n; |
1592 | if (vec_seek == vec->iov_len) { | |
1593 | vec++; | |
1594 | vec_seek = 0; | |
1595 | } | |
1596 | } while (len); | |
1597 | *pvec = vec; | |
1598 | *pvec_seek = vec_seek; | |
1da177e4 LT |
1599 | |
1600 | /* GO GO GO */ | |
1601 | map_write(map, CMD(0xd0), cmd_adr); | |
1602 | chip->state = FL_WRITING; | |
1603 | ||
c172471b NP |
1604 | ret = INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, |
1605 | adr, len, | |
46a1652c | 1606 | chip->buffer_write_time); |
c172471b NP |
1607 | if (ret) { |
1608 | map_write(map, CMD(0x70), cmd_adr); | |
1609 | chip->state = FL_STATUS; | |
1610 | xip_enable(map, chip, cmd_adr); | |
1611 | printk(KERN_ERR "%s: buffer write error (status timeout)\n", map->name); | |
1612 | goto out; | |
1da177e4 | 1613 | } |
1da177e4 | 1614 | |
4843653c | 1615 | /* check for errors */ |
c172471b | 1616 | status = map_read(map, cmd_adr); |
4843653c NP |
1617 | if (map_word_bitsset(map, status, CMD(0x1a))) { |
1618 | unsigned long chipstatus = MERGESTATUS(status); | |
1619 | ||
1620 | /* reset status */ | |
1da177e4 | 1621 | map_write(map, CMD(0x50), cmd_adr); |
4843653c NP |
1622 | map_write(map, CMD(0x70), cmd_adr); |
1623 | xip_enable(map, chip, cmd_adr); | |
1624 | ||
1625 | if (chipstatus & 0x02) { | |
1626 | ret = -EROFS; | |
1627 | } else if (chipstatus & 0x08) { | |
1628 | printk(KERN_ERR "%s: buffer write error (bad VPP)\n", map->name); | |
1629 | ret = -EIO; | |
1630 | } else { | |
1631 | printk(KERN_ERR "%s: buffer write error (status 0x%lx)\n", map->name, chipstatus); | |
1632 | ret = -EINVAL; | |
1633 | } | |
1634 | ||
1635 | goto out; | |
1da177e4 LT |
1636 | } |
1637 | ||
1638 | xip_enable(map, chip, cmd_adr); | |
1639 | out: put_chip(map, chip, cmd_adr); | |
1640 | spin_unlock(chip->mutex); | |
1641 | return ret; | |
1642 | } | |
1643 | ||
e102d54a NP |
1644 | static int cfi_intelext_writev (struct mtd_info *mtd, const struct kvec *vecs, |
1645 | unsigned long count, loff_t to, size_t *retlen) | |
1da177e4 LT |
1646 | { |
1647 | struct map_info *map = mtd->priv; | |
1648 | struct cfi_private *cfi = map->fldrv_priv; | |
1649 | int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; | |
1650 | int ret = 0; | |
1651 | int chipnum; | |
e102d54a NP |
1652 | unsigned long ofs, vec_seek, i; |
1653 | size_t len = 0; | |
1654 | ||
1655 | for (i = 0; i < count; i++) | |
1656 | len += vecs[i].iov_len; | |
1da177e4 LT |
1657 | |
1658 | *retlen = 0; | |
1659 | if (!len) | |
1660 | return 0; | |
1661 | ||
1662 | chipnum = to >> cfi->chipshift; | |
e102d54a NP |
1663 | ofs = to - (chipnum << cfi->chipshift); |
1664 | vec_seek = 0; | |
1da177e4 | 1665 | |
e102d54a | 1666 | do { |
1da177e4 LT |
1667 | /* We must not cross write block boundaries */ |
1668 | int size = wbufsize - (ofs & (wbufsize-1)); | |
1669 | ||
1670 | if (size > len) | |
1671 | size = len; | |
1f948b43 | 1672 | ret = do_write_buffer(map, &cfi->chips[chipnum], |
e102d54a | 1673 | ofs, &vecs, &vec_seek, size); |
1da177e4 LT |
1674 | if (ret) |
1675 | return ret; | |
1676 | ||
1677 | ofs += size; | |
1da177e4 LT |
1678 | (*retlen) += size; |
1679 | len -= size; | |
1680 | ||
1681 | if (ofs >> cfi->chipshift) { | |
1f948b43 | 1682 | chipnum ++; |
1da177e4 LT |
1683 | ofs = 0; |
1684 | if (chipnum == cfi->numchips) | |
1685 | return 0; | |
1686 | } | |
df54b52c JB |
1687 | |
1688 | /* Be nice and reschedule with the chip in a usable state for other | |
1689 | processes. */ | |
1690 | cond_resched(); | |
1691 | ||
e102d54a NP |
1692 | } while (len); |
1693 | ||
1da177e4 LT |
1694 | return 0; |
1695 | } | |
1696 | ||
e102d54a NP |
1697 | static int cfi_intelext_write_buffers (struct mtd_info *mtd, loff_t to, |
1698 | size_t len, size_t *retlen, const u_char *buf) | |
1699 | { | |
1700 | struct kvec vec; | |
1701 | ||
1702 | vec.iov_base = (void *) buf; | |
1703 | vec.iov_len = len; | |
1704 | ||
1705 | return cfi_intelext_writev(mtd, &vec, 1, to, retlen); | |
1706 | } | |
1707 | ||
1da177e4 LT |
1708 | static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, |
1709 | unsigned long adr, int len, void *thunk) | |
1710 | { | |
1711 | struct cfi_private *cfi = map->fldrv_priv; | |
c172471b | 1712 | map_word status; |
1da177e4 | 1713 | int retries = 3; |
c172471b | 1714 | int ret; |
1da177e4 LT |
1715 | |
1716 | adr += chip->start; | |
1717 | ||
1da177e4 LT |
1718 | retry: |
1719 | spin_lock(chip->mutex); | |
1720 | ret = get_chip(map, chip, adr, FL_ERASING); | |
1721 | if (ret) { | |
1722 | spin_unlock(chip->mutex); | |
1723 | return ret; | |
1724 | } | |
1725 | ||
1726 | XIP_INVAL_CACHED_RANGE(map, adr, len); | |
1727 | ENABLE_VPP(map); | |
1728 | xip_disable(map, chip, adr); | |
1729 | ||
1730 | /* Clear the status register first */ | |
1731 | map_write(map, CMD(0x50), adr); | |
1732 | ||
1733 | /* Now erase */ | |
1734 | map_write(map, CMD(0x20), adr); | |
1735 | map_write(map, CMD(0xD0), adr); | |
1736 | chip->state = FL_ERASING; | |
1737 | chip->erase_suspended = 0; | |
1738 | ||
c172471b NP |
1739 | ret = INVAL_CACHE_AND_WAIT(map, chip, adr, |
1740 | adr, len, | |
46a1652c | 1741 | chip->erase_time); |
c172471b NP |
1742 | if (ret) { |
1743 | map_write(map, CMD(0x70), adr); | |
1744 | chip->state = FL_STATUS; | |
1745 | xip_enable(map, chip, adr); | |
1746 | printk(KERN_ERR "%s: block erase error: (status timeout)\n", map->name); | |
1747 | goto out; | |
1da177e4 LT |
1748 | } |
1749 | ||
1750 | /* We've broken this before. It doesn't hurt to be safe */ | |
1751 | map_write(map, CMD(0x70), adr); | |
1752 | chip->state = FL_STATUS; | |
1753 | status = map_read(map, adr); | |
1754 | ||
4843653c | 1755 | /* check for errors */ |
1da177e4 | 1756 | if (map_word_bitsset(map, status, CMD(0x3a))) { |
4843653c | 1757 | unsigned long chipstatus = MERGESTATUS(status); |
1da177e4 LT |
1758 | |
1759 | /* Reset the error bits */ | |
1760 | map_write(map, CMD(0x50), adr); | |
1761 | map_write(map, CMD(0x70), adr); | |
1762 | xip_enable(map, chip, adr); | |
1763 | ||
1da177e4 | 1764 | if ((chipstatus & 0x30) == 0x30) { |
4843653c NP |
1765 | printk(KERN_ERR "%s: block erase error: (bad command sequence, status 0x%lx)\n", map->name, chipstatus); |
1766 | ret = -EINVAL; | |
1da177e4 LT |
1767 | } else if (chipstatus & 0x02) { |
1768 | /* Protection bit set */ | |
1769 | ret = -EROFS; | |
1770 | } else if (chipstatus & 0x8) { | |
1771 | /* Voltage */ | |
4843653c | 1772 | printk(KERN_ERR "%s: block erase error: (bad VPP)\n", map->name); |
1da177e4 | 1773 | ret = -EIO; |
4843653c NP |
1774 | } else if (chipstatus & 0x20 && retries--) { |
1775 | printk(KERN_DEBUG "block erase failed at 0x%08lx: status 0x%lx. Retrying...\n", adr, chipstatus); | |
4843653c NP |
1776 | put_chip(map, chip, adr); |
1777 | spin_unlock(chip->mutex); | |
1778 | goto retry; | |
1779 | } else { | |
1780 | printk(KERN_ERR "%s: block erase failed at 0x%08lx (status 0x%lx)\n", map->name, adr, chipstatus); | |
1da177e4 LT |
1781 | ret = -EIO; |
1782 | } | |
4843653c NP |
1783 | |
1784 | goto out; | |
1da177e4 LT |
1785 | } |
1786 | ||
4843653c | 1787 | xip_enable(map, chip, adr); |
1da177e4 LT |
1788 | out: put_chip(map, chip, adr); |
1789 | spin_unlock(chip->mutex); | |
1790 | return ret; | |
1791 | } | |
1792 | ||
029a9eb1 | 1793 | static int cfi_intelext_erase_varsize(struct mtd_info *mtd, struct erase_info *instr) |
1da177e4 LT |
1794 | { |
1795 | unsigned long ofs, len; | |
1796 | int ret; | |
1797 | ||
1798 | ofs = instr->addr; | |
1799 | len = instr->len; | |
1800 | ||
1801 | ret = cfi_varsize_frob(mtd, do_erase_oneblock, ofs, len, NULL); | |
1802 | if (ret) | |
1803 | return ret; | |
1804 | ||
1805 | instr->state = MTD_ERASE_DONE; | |
1806 | mtd_erase_callback(instr); | |
1f948b43 | 1807 | |
1da177e4 LT |
1808 | return 0; |
1809 | } | |
1810 | ||
1811 | static void cfi_intelext_sync (struct mtd_info *mtd) | |
1812 | { | |
1813 | struct map_info *map = mtd->priv; | |
1814 | struct cfi_private *cfi = map->fldrv_priv; | |
1815 | int i; | |
1816 | struct flchip *chip; | |
1817 | int ret = 0; | |
1818 | ||
1819 | for (i=0; !ret && i<cfi->numchips; i++) { | |
1820 | chip = &cfi->chips[i]; | |
1821 | ||
1822 | spin_lock(chip->mutex); | |
1823 | ret = get_chip(map, chip, chip->start, FL_SYNCING); | |
1824 | ||
1825 | if (!ret) { | |
1826 | chip->oldstate = chip->state; | |
1827 | chip->state = FL_SYNCING; | |
1f948b43 | 1828 | /* No need to wake_up() on this state change - |
1da177e4 LT |
1829 | * as the whole point is that nobody can do anything |
1830 | * with the chip now anyway. | |
1831 | */ | |
1832 | } | |
1833 | spin_unlock(chip->mutex); | |
1834 | } | |
1835 | ||
1836 | /* Unlock the chips again */ | |
1837 | ||
1838 | for (i--; i >=0; i--) { | |
1839 | chip = &cfi->chips[i]; | |
1840 | ||
1841 | spin_lock(chip->mutex); | |
1f948b43 | 1842 | |
1da177e4 LT |
1843 | if (chip->state == FL_SYNCING) { |
1844 | chip->state = chip->oldstate; | |
09c79335 | 1845 | chip->oldstate = FL_READY; |
1da177e4 LT |
1846 | wake_up(&chip->wq); |
1847 | } | |
1848 | spin_unlock(chip->mutex); | |
1849 | } | |
1850 | } | |
1851 | ||
0ecbc81a | 1852 | static int __xipram do_getlockstatus_oneblock(struct map_info *map, |
1da177e4 LT |
1853 | struct flchip *chip, |
1854 | unsigned long adr, | |
1855 | int len, void *thunk) | |
1856 | { | |
1857 | struct cfi_private *cfi = map->fldrv_priv; | |
1858 | int status, ofs_factor = cfi->interleave * cfi->device_type; | |
1859 | ||
c25bb1f5 | 1860 | adr += chip->start; |
1da177e4 | 1861 | xip_disable(map, chip, adr+(2*ofs_factor)); |
c25bb1f5 | 1862 | map_write(map, CMD(0x90), adr+(2*ofs_factor)); |
1da177e4 LT |
1863 | chip->state = FL_JEDEC_QUERY; |
1864 | status = cfi_read_query(map, adr+(2*ofs_factor)); | |
1865 | xip_enable(map, chip, 0); | |
0ecbc81a RG |
1866 | return status; |
1867 | } | |
1868 | ||
1869 | #ifdef DEBUG_LOCK_BITS | |
1870 | static int __xipram do_printlockstatus_oneblock(struct map_info *map, | |
1871 | struct flchip *chip, | |
1872 | unsigned long adr, | |
1873 | int len, void *thunk) | |
1874 | { | |
1da177e4 | 1875 | printk(KERN_DEBUG "block status register for 0x%08lx is %x\n", |
0ecbc81a | 1876 | adr, do_getlockstatus_oneblock(map, chip, adr, len, thunk)); |
1da177e4 LT |
1877 | return 0; |
1878 | } | |
1879 | #endif | |
1880 | ||
1881 | #define DO_XXLOCK_ONEBLOCK_LOCK ((void *) 1) | |
1882 | #define DO_XXLOCK_ONEBLOCK_UNLOCK ((void *) 2) | |
1883 | ||
1884 | static int __xipram do_xxlock_oneblock(struct map_info *map, struct flchip *chip, | |
1885 | unsigned long adr, int len, void *thunk) | |
1886 | { | |
1887 | struct cfi_private *cfi = map->fldrv_priv; | |
9a6e73ec | 1888 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
c172471b | 1889 | int udelay; |
1da177e4 LT |
1890 | int ret; |
1891 | ||
1892 | adr += chip->start; | |
1893 | ||
1da177e4 LT |
1894 | spin_lock(chip->mutex); |
1895 | ret = get_chip(map, chip, adr, FL_LOCKING); | |
1896 | if (ret) { | |
1897 | spin_unlock(chip->mutex); | |
1898 | return ret; | |
1899 | } | |
1900 | ||
1901 | ENABLE_VPP(map); | |
1902 | xip_disable(map, chip, adr); | |
1f948b43 | 1903 | |
1da177e4 LT |
1904 | map_write(map, CMD(0x60), adr); |
1905 | if (thunk == DO_XXLOCK_ONEBLOCK_LOCK) { | |
1906 | map_write(map, CMD(0x01), adr); | |
1907 | chip->state = FL_LOCKING; | |
1908 | } else if (thunk == DO_XXLOCK_ONEBLOCK_UNLOCK) { | |
1909 | map_write(map, CMD(0xD0), adr); | |
1910 | chip->state = FL_UNLOCKING; | |
1911 | } else | |
1912 | BUG(); | |
1913 | ||
9a6e73ec TP |
1914 | /* |
1915 | * If Instant Individual Block Locking supported then no need | |
1916 | * to delay. | |
1917 | */ | |
c172471b | 1918 | udelay = (!extp || !(extp->FeatureSupport & (1 << 5))) ? 1000000/HZ : 0; |
9a6e73ec | 1919 | |
c172471b NP |
1920 | ret = WAIT_TIMEOUT(map, chip, adr, udelay); |
1921 | if (ret) { | |
1922 | map_write(map, CMD(0x70), adr); | |
1923 | chip->state = FL_STATUS; | |
1924 | xip_enable(map, chip, adr); | |
1925 | printk(KERN_ERR "%s: block unlock error: (status timeout)\n", map->name); | |
1926 | goto out; | |
1da177e4 | 1927 | } |
1f948b43 | 1928 | |
1da177e4 | 1929 | xip_enable(map, chip, adr); |
c172471b | 1930 | out: put_chip(map, chip, adr); |
1da177e4 | 1931 | spin_unlock(chip->mutex); |
c172471b | 1932 | return ret; |
1da177e4 LT |
1933 | } |
1934 | ||
1935 | static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, size_t len) | |
1936 | { | |
1937 | int ret; | |
1938 | ||
1939 | #ifdef DEBUG_LOCK_BITS | |
1940 | printk(KERN_DEBUG "%s: lock status before, ofs=0x%08llx, len=0x%08X\n", | |
1941 | __FUNCTION__, ofs, len); | |
1942 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, | |
1da1caf8 | 1943 | ofs, len, NULL); |
1da177e4 LT |
1944 | #endif |
1945 | ||
1f948b43 | 1946 | ret = cfi_varsize_frob(mtd, do_xxlock_oneblock, |
1da177e4 | 1947 | ofs, len, DO_XXLOCK_ONEBLOCK_LOCK); |
1f948b43 | 1948 | |
1da177e4 LT |
1949 | #ifdef DEBUG_LOCK_BITS |
1950 | printk(KERN_DEBUG "%s: lock status after, ret=%d\n", | |
1951 | __FUNCTION__, ret); | |
1952 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, | |
1da1caf8 | 1953 | ofs, len, NULL); |
1da177e4 LT |
1954 | #endif |
1955 | ||
1956 | return ret; | |
1957 | } | |
1958 | ||
1959 | static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, size_t len) | |
1960 | { | |
1961 | int ret; | |
1962 | ||
1963 | #ifdef DEBUG_LOCK_BITS | |
1964 | printk(KERN_DEBUG "%s: lock status before, ofs=0x%08llx, len=0x%08X\n", | |
1965 | __FUNCTION__, ofs, len); | |
1966 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, | |
1da1caf8 | 1967 | ofs, len, NULL); |
1da177e4 LT |
1968 | #endif |
1969 | ||
1970 | ret = cfi_varsize_frob(mtd, do_xxlock_oneblock, | |
1971 | ofs, len, DO_XXLOCK_ONEBLOCK_UNLOCK); | |
1f948b43 | 1972 | |
1da177e4 LT |
1973 | #ifdef DEBUG_LOCK_BITS |
1974 | printk(KERN_DEBUG "%s: lock status after, ret=%d\n", | |
1975 | __FUNCTION__, ret); | |
1f948b43 | 1976 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, |
1da1caf8 | 1977 | ofs, len, NULL); |
1da177e4 | 1978 | #endif |
1f948b43 | 1979 | |
1da177e4 LT |
1980 | return ret; |
1981 | } | |
1982 | ||
f77814dd NP |
1983 | #ifdef CONFIG_MTD_OTP |
1984 | ||
1f948b43 | 1985 | typedef int (*otp_op_t)(struct map_info *map, struct flchip *chip, |
f77814dd NP |
1986 | u_long data_offset, u_char *buf, u_int size, |
1987 | u_long prot_offset, u_int groupno, u_int groupsize); | |
1988 | ||
1989 | static int __xipram | |
1990 | do_otp_read(struct map_info *map, struct flchip *chip, u_long offset, | |
1991 | u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) | |
1992 | { | |
1993 | struct cfi_private *cfi = map->fldrv_priv; | |
1994 | int ret; | |
1995 | ||
1996 | spin_lock(chip->mutex); | |
1997 | ret = get_chip(map, chip, chip->start, FL_JEDEC_QUERY); | |
1998 | if (ret) { | |
1999 | spin_unlock(chip->mutex); | |
2000 | return ret; | |
2001 | } | |
2002 | ||
2003 | /* let's ensure we're not reading back cached data from array mode */ | |
6da70124 | 2004 | INVALIDATE_CACHED_RANGE(map, chip->start + offset, size); |
f77814dd NP |
2005 | |
2006 | xip_disable(map, chip, chip->start); | |
2007 | if (chip->state != FL_JEDEC_QUERY) { | |
2008 | map_write(map, CMD(0x90), chip->start); | |
2009 | chip->state = FL_JEDEC_QUERY; | |
2010 | } | |
2011 | map_copy_from(map, buf, chip->start + offset, size); | |
2012 | xip_enable(map, chip, chip->start); | |
2013 | ||
2014 | /* then ensure we don't keep OTP data in the cache */ | |
6da70124 | 2015 | INVALIDATE_CACHED_RANGE(map, chip->start + offset, size); |
f77814dd NP |
2016 | |
2017 | put_chip(map, chip, chip->start); | |
2018 | spin_unlock(chip->mutex); | |
2019 | return 0; | |
2020 | } | |
2021 | ||
2022 | static int | |
2023 | do_otp_write(struct map_info *map, struct flchip *chip, u_long offset, | |
2024 | u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) | |
2025 | { | |
2026 | int ret; | |
2027 | ||
2028 | while (size) { | |
2029 | unsigned long bus_ofs = offset & ~(map_bankwidth(map)-1); | |
2030 | int gap = offset - bus_ofs; | |
2031 | int n = min_t(int, size, map_bankwidth(map)-gap); | |
2032 | map_word datum = map_word_ff(map); | |
2033 | ||
2034 | datum = map_word_load_partial(map, datum, buf, gap, n); | |
2035 | ret = do_write_oneword(map, chip, bus_ofs, datum, FL_OTP_WRITE); | |
1f948b43 | 2036 | if (ret) |
f77814dd NP |
2037 | return ret; |
2038 | ||
2039 | offset += n; | |
2040 | buf += n; | |
2041 | size -= n; | |
2042 | } | |
2043 | ||
2044 | return 0; | |
2045 | } | |
2046 | ||
2047 | static int | |
2048 | do_otp_lock(struct map_info *map, struct flchip *chip, u_long offset, | |
2049 | u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) | |
2050 | { | |
2051 | struct cfi_private *cfi = map->fldrv_priv; | |
2052 | map_word datum; | |
2053 | ||
2054 | /* make sure area matches group boundaries */ | |
332d71f7 | 2055 | if (size != grpsz) |
f77814dd NP |
2056 | return -EXDEV; |
2057 | ||
2058 | datum = map_word_ff(map); | |
2059 | datum = map_word_clr(map, datum, CMD(1 << grpno)); | |
2060 | return do_write_oneword(map, chip, prot, datum, FL_OTP_WRITE); | |
2061 | } | |
2062 | ||
2063 | static int cfi_intelext_otp_walk(struct mtd_info *mtd, loff_t from, size_t len, | |
2064 | size_t *retlen, u_char *buf, | |
2065 | otp_op_t action, int user_regs) | |
2066 | { | |
2067 | struct map_info *map = mtd->priv; | |
2068 | struct cfi_private *cfi = map->fldrv_priv; | |
2069 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; | |
2070 | struct flchip *chip; | |
2071 | struct cfi_intelext_otpinfo *otp; | |
2072 | u_long devsize, reg_prot_offset, data_offset; | |
2073 | u_int chip_num, chip_step, field, reg_fact_size, reg_user_size; | |
2074 | u_int groups, groupno, groupsize, reg_fact_groups, reg_user_groups; | |
2075 | int ret; | |
2076 | ||
2077 | *retlen = 0; | |
2078 | ||
2079 | /* Check that we actually have some OTP registers */ | |
2080 | if (!extp || !(extp->FeatureSupport & 64) || !extp->NumProtectionFields) | |
2081 | return -ENODATA; | |
2082 | ||
2083 | /* we need real chips here not virtual ones */ | |
2084 | devsize = (1 << cfi->cfiq->DevSize) * cfi->interleave; | |
2085 | chip_step = devsize >> cfi->chipshift; | |
dce2b4da NP |
2086 | chip_num = 0; |
2087 | ||
2088 | /* Some chips have OTP located in the _top_ partition only. | |
2089 | For example: Intel 28F256L18T (T means top-parameter device) */ | |
2090 | if (cfi->mfr == MANUFACTURER_INTEL) { | |
2091 | switch (cfi->id) { | |
2092 | case 0x880b: | |
2093 | case 0x880c: | |
2094 | case 0x880d: | |
2095 | chip_num = chip_step - 1; | |
2096 | } | |
2097 | } | |
f77814dd | 2098 | |
dce2b4da | 2099 | for ( ; chip_num < cfi->numchips; chip_num += chip_step) { |
f77814dd NP |
2100 | chip = &cfi->chips[chip_num]; |
2101 | otp = (struct cfi_intelext_otpinfo *)&extp->extra[0]; | |
2102 | ||
2103 | /* first OTP region */ | |
2104 | field = 0; | |
2105 | reg_prot_offset = extp->ProtRegAddr; | |
2106 | reg_fact_groups = 1; | |
2107 | reg_fact_size = 1 << extp->FactProtRegSize; | |
2108 | reg_user_groups = 1; | |
2109 | reg_user_size = 1 << extp->UserProtRegSize; | |
2110 | ||
2111 | while (len > 0) { | |
2112 | /* flash geometry fixup */ | |
2113 | data_offset = reg_prot_offset + 1; | |
2114 | data_offset *= cfi->interleave * cfi->device_type; | |
2115 | reg_prot_offset *= cfi->interleave * cfi->device_type; | |
2116 | reg_fact_size *= cfi->interleave; | |
2117 | reg_user_size *= cfi->interleave; | |
2118 | ||
2119 | if (user_regs) { | |
2120 | groups = reg_user_groups; | |
2121 | groupsize = reg_user_size; | |
2122 | /* skip over factory reg area */ | |
2123 | groupno = reg_fact_groups; | |
2124 | data_offset += reg_fact_groups * reg_fact_size; | |
2125 | } else { | |
2126 | groups = reg_fact_groups; | |
2127 | groupsize = reg_fact_size; | |
2128 | groupno = 0; | |
2129 | } | |
2130 | ||
332d71f7 | 2131 | while (len > 0 && groups > 0) { |
f77814dd NP |
2132 | if (!action) { |
2133 | /* | |
2134 | * Special case: if action is NULL | |
2135 | * we fill buf with otp_info records. | |
2136 | */ | |
2137 | struct otp_info *otpinfo; | |
2138 | map_word lockword; | |
2139 | len -= sizeof(struct otp_info); | |
2140 | if (len <= 0) | |
2141 | return -ENOSPC; | |
2142 | ret = do_otp_read(map, chip, | |
2143 | reg_prot_offset, | |
2144 | (u_char *)&lockword, | |
2145 | map_bankwidth(map), | |
2146 | 0, 0, 0); | |
2147 | if (ret) | |
2148 | return ret; | |
2149 | otpinfo = (struct otp_info *)buf; | |
2150 | otpinfo->start = from; | |
2151 | otpinfo->length = groupsize; | |
2152 | otpinfo->locked = | |
2153 | !map_word_bitsset(map, lockword, | |
2154 | CMD(1 << groupno)); | |
2155 | from += groupsize; | |
2156 | buf += sizeof(*otpinfo); | |
2157 | *retlen += sizeof(*otpinfo); | |
2158 | } else if (from >= groupsize) { | |
2159 | from -= groupsize; | |
332d71f7 | 2160 | data_offset += groupsize; |
f77814dd NP |
2161 | } else { |
2162 | int size = groupsize; | |
2163 | data_offset += from; | |
2164 | size -= from; | |
2165 | from = 0; | |
2166 | if (size > len) | |
2167 | size = len; | |
2168 | ret = action(map, chip, data_offset, | |
2169 | buf, size, reg_prot_offset, | |
2170 | groupno, groupsize); | |
2171 | if (ret < 0) | |
2172 | return ret; | |
2173 | buf += size; | |
2174 | len -= size; | |
2175 | *retlen += size; | |
332d71f7 | 2176 | data_offset += size; |
f77814dd NP |
2177 | } |
2178 | groupno++; | |
2179 | groups--; | |
2180 | } | |
2181 | ||
2182 | /* next OTP region */ | |
2183 | if (++field == extp->NumProtectionFields) | |
2184 | break; | |
2185 | reg_prot_offset = otp->ProtRegAddr; | |
2186 | reg_fact_groups = otp->FactGroups; | |
2187 | reg_fact_size = 1 << otp->FactProtRegSize; | |
2188 | reg_user_groups = otp->UserGroups; | |
2189 | reg_user_size = 1 << otp->UserProtRegSize; | |
2190 | otp++; | |
2191 | } | |
2192 | } | |
2193 | ||
2194 | return 0; | |
2195 | } | |
2196 | ||
2197 | static int cfi_intelext_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, | |
2198 | size_t len, size_t *retlen, | |
2199 | u_char *buf) | |
2200 | { | |
2201 | return cfi_intelext_otp_walk(mtd, from, len, retlen, | |
2202 | buf, do_otp_read, 0); | |
2203 | } | |
2204 | ||
2205 | static int cfi_intelext_read_user_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, 1); | |
2211 | } | |
2212 | ||
2213 | static int cfi_intelext_write_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_write, 1); | |
2219 | } | |
2220 | ||
2221 | static int cfi_intelext_lock_user_prot_reg(struct mtd_info *mtd, | |
2222 | loff_t from, size_t len) | |
2223 | { | |
2224 | size_t retlen; | |
2225 | return cfi_intelext_otp_walk(mtd, from, len, &retlen, | |
2226 | NULL, do_otp_lock, 1); | |
2227 | } | |
2228 | ||
1f948b43 | 2229 | static int cfi_intelext_get_fact_prot_info(struct mtd_info *mtd, |
f77814dd NP |
2230 | struct otp_info *buf, size_t len) |
2231 | { | |
2232 | size_t retlen; | |
2233 | int ret; | |
2234 | ||
2235 | ret = cfi_intelext_otp_walk(mtd, 0, len, &retlen, (u_char *)buf, NULL, 0); | |
2236 | return ret ? : retlen; | |
2237 | } | |
2238 | ||
2239 | static int cfi_intelext_get_user_prot_info(struct mtd_info *mtd, | |
2240 | struct otp_info *buf, size_t len) | |
2241 | { | |
2242 | size_t retlen; | |
2243 | int ret; | |
2244 | ||
2245 | ret = cfi_intelext_otp_walk(mtd, 0, len, &retlen, (u_char *)buf, NULL, 1); | |
2246 | return ret ? : retlen; | |
2247 | } | |
2248 | ||
2249 | #endif | |
2250 | ||
0ecbc81a RG |
2251 | static void cfi_intelext_save_locks(struct mtd_info *mtd) |
2252 | { | |
2253 | struct mtd_erase_region_info *region; | |
2254 | int block, status, i; | |
2255 | unsigned long adr; | |
2256 | size_t len; | |
2257 | ||
2258 | for (i = 0; i < mtd->numeraseregions; i++) { | |
2259 | region = &mtd->eraseregions[i]; | |
2260 | if (!region->lockmap) | |
2261 | continue; | |
2262 | ||
2263 | for (block = 0; block < region->numblocks; block++){ | |
2264 | len = region->erasesize; | |
2265 | adr = region->offset + block * len; | |
2266 | ||
2267 | status = cfi_varsize_frob(mtd, | |
029a9eb1 | 2268 | do_getlockstatus_oneblock, adr, len, NULL); |
0ecbc81a RG |
2269 | if (status) |
2270 | set_bit(block, region->lockmap); | |
2271 | else | |
2272 | clear_bit(block, region->lockmap); | |
2273 | } | |
2274 | } | |
2275 | } | |
2276 | ||
1da177e4 LT |
2277 | static int cfi_intelext_suspend(struct mtd_info *mtd) |
2278 | { | |
2279 | struct map_info *map = mtd->priv; | |
2280 | struct cfi_private *cfi = map->fldrv_priv; | |
0ecbc81a | 2281 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
1da177e4 LT |
2282 | int i; |
2283 | struct flchip *chip; | |
2284 | int ret = 0; | |
2285 | ||
0ecbc81a RG |
2286 | if ((mtd->flags & MTD_STUPID_LOCK) |
2287 | && extp && (extp->FeatureSupport & (1 << 5))) | |
2288 | cfi_intelext_save_locks(mtd); | |
2289 | ||
1da177e4 LT |
2290 | for (i=0; !ret && i<cfi->numchips; i++) { |
2291 | chip = &cfi->chips[i]; | |
2292 | ||
2293 | spin_lock(chip->mutex); | |
2294 | ||
2295 | switch (chip->state) { | |
2296 | case FL_READY: | |
2297 | case FL_STATUS: | |
2298 | case FL_CFI_QUERY: | |
2299 | case FL_JEDEC_QUERY: | |
2300 | if (chip->oldstate == FL_READY) { | |
a86aaa6d DA |
2301 | /* place the chip in a known state before suspend */ |
2302 | map_write(map, CMD(0xFF), cfi->chips[i].start); | |
1da177e4 LT |
2303 | chip->oldstate = chip->state; |
2304 | chip->state = FL_PM_SUSPENDED; | |
1f948b43 | 2305 | /* No need to wake_up() on this state change - |
1da177e4 LT |
2306 | * as the whole point is that nobody can do anything |
2307 | * with the chip now anyway. | |
2308 | */ | |
2309 | } else { | |
2310 | /* There seems to be an operation pending. We must wait for it. */ | |
2311 | printk(KERN_NOTICE "Flash device refused suspend due to pending operation (oldstate %d)\n", chip->oldstate); | |
2312 | ret = -EAGAIN; | |
2313 | } | |
2314 | break; | |
2315 | default: | |
2316 | /* Should we actually wait? Once upon a time these routines weren't | |
2317 | allowed to. Or should we return -EAGAIN, because the upper layers | |
2318 | ought to have already shut down anything which was using the device | |
2319 | anyway? The latter for now. */ | |
2320 | printk(KERN_NOTICE "Flash device refused suspend due to active operation (state %d)\n", chip->oldstate); | |
2321 | ret = -EAGAIN; | |
2322 | case FL_PM_SUSPENDED: | |
2323 | break; | |
2324 | } | |
2325 | spin_unlock(chip->mutex); | |
2326 | } | |
2327 | ||
2328 | /* Unlock the chips again */ | |
2329 | ||
2330 | if (ret) { | |
2331 | for (i--; i >=0; i--) { | |
2332 | chip = &cfi->chips[i]; | |
1f948b43 | 2333 | |
1da177e4 | 2334 | spin_lock(chip->mutex); |
1f948b43 | 2335 | |
1da177e4 LT |
2336 | if (chip->state == FL_PM_SUSPENDED) { |
2337 | /* No need to force it into a known state here, | |
2338 | because we're returning failure, and it didn't | |
2339 | get power cycled */ | |
2340 | chip->state = chip->oldstate; | |
2341 | chip->oldstate = FL_READY; | |
2342 | wake_up(&chip->wq); | |
2343 | } | |
2344 | spin_unlock(chip->mutex); | |
2345 | } | |
1f948b43 TG |
2346 | } |
2347 | ||
1da177e4 LT |
2348 | return ret; |
2349 | } | |
2350 | ||
0ecbc81a RG |
2351 | static void cfi_intelext_restore_locks(struct mtd_info *mtd) |
2352 | { | |
2353 | struct mtd_erase_region_info *region; | |
2354 | int block, i; | |
2355 | unsigned long adr; | |
2356 | size_t len; | |
2357 | ||
2358 | for (i = 0; i < mtd->numeraseregions; i++) { | |
2359 | region = &mtd->eraseregions[i]; | |
2360 | if (!region->lockmap) | |
2361 | continue; | |
2362 | ||
2363 | for (block = 0; block < region->numblocks; block++) { | |
2364 | len = region->erasesize; | |
2365 | adr = region->offset + block * len; | |
2366 | ||
2367 | if (!test_bit(block, region->lockmap)) | |
2368 | cfi_intelext_unlock(mtd, adr, len); | |
2369 | } | |
2370 | } | |
2371 | } | |
2372 | ||
1da177e4 LT |
2373 | static void cfi_intelext_resume(struct mtd_info *mtd) |
2374 | { | |
2375 | struct map_info *map = mtd->priv; | |
2376 | struct cfi_private *cfi = map->fldrv_priv; | |
0ecbc81a | 2377 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
1da177e4 LT |
2378 | int i; |
2379 | struct flchip *chip; | |
2380 | ||
2381 | for (i=0; i<cfi->numchips; i++) { | |
1f948b43 | 2382 | |
1da177e4 LT |
2383 | chip = &cfi->chips[i]; |
2384 | ||
2385 | spin_lock(chip->mutex); | |
1f948b43 | 2386 | |
1da177e4 LT |
2387 | /* Go to known state. Chip may have been power cycled */ |
2388 | if (chip->state == FL_PM_SUSPENDED) { | |
2389 | map_write(map, CMD(0xFF), cfi->chips[i].start); | |
2390 | chip->oldstate = chip->state = FL_READY; | |
2391 | wake_up(&chip->wq); | |
2392 | } | |
2393 | ||
2394 | spin_unlock(chip->mutex); | |
2395 | } | |
0ecbc81a RG |
2396 | |
2397 | if ((mtd->flags & MTD_STUPID_LOCK) | |
2398 | && extp && (extp->FeatureSupport & (1 << 5))) | |
2399 | cfi_intelext_restore_locks(mtd); | |
1da177e4 LT |
2400 | } |
2401 | ||
963a6fb0 NP |
2402 | static int cfi_intelext_reset(struct mtd_info *mtd) |
2403 | { | |
2404 | struct map_info *map = mtd->priv; | |
2405 | struct cfi_private *cfi = map->fldrv_priv; | |
2406 | int i, ret; | |
2407 | ||
2408 | for (i=0; i < cfi->numchips; i++) { | |
2409 | struct flchip *chip = &cfi->chips[i]; | |
2410 | ||
2411 | /* force the completion of any ongoing operation | |
1f948b43 | 2412 | and switch to array mode so any bootloader in |
963a6fb0 NP |
2413 | flash is accessible for soft reboot. */ |
2414 | spin_lock(chip->mutex); | |
c4a9f88d | 2415 | ret = get_chip(map, chip, chip->start, FL_SHUTDOWN); |
963a6fb0 NP |
2416 | if (!ret) { |
2417 | map_write(map, CMD(0xff), chip->start); | |
c4a9f88d | 2418 | chip->state = FL_SHUTDOWN; |
963a6fb0 NP |
2419 | } |
2420 | spin_unlock(chip->mutex); | |
2421 | } | |
2422 | ||
2423 | return 0; | |
2424 | } | |
2425 | ||
2426 | static int cfi_intelext_reboot(struct notifier_block *nb, unsigned long val, | |
2427 | void *v) | |
2428 | { | |
2429 | struct mtd_info *mtd; | |
2430 | ||
2431 | mtd = container_of(nb, struct mtd_info, reboot_notifier); | |
2432 | cfi_intelext_reset(mtd); | |
2433 | return NOTIFY_DONE; | |
2434 | } | |
2435 | ||
1da177e4 LT |
2436 | static void cfi_intelext_destroy(struct mtd_info *mtd) |
2437 | { | |
2438 | struct map_info *map = mtd->priv; | |
2439 | struct cfi_private *cfi = map->fldrv_priv; | |
0ecbc81a RG |
2440 | struct mtd_erase_region_info *region; |
2441 | int i; | |
963a6fb0 NP |
2442 | cfi_intelext_reset(mtd); |
2443 | unregister_reboot_notifier(&mtd->reboot_notifier); | |
1da177e4 LT |
2444 | kfree(cfi->cmdset_priv); |
2445 | kfree(cfi->cfiq); | |
2446 | kfree(cfi->chips[0].priv); | |
2447 | kfree(cfi); | |
0ecbc81a RG |
2448 | for (i = 0; i < mtd->numeraseregions; i++) { |
2449 | region = &mtd->eraseregions[i]; | |
2450 | if (region->lockmap) | |
2451 | kfree(region->lockmap); | |
2452 | } | |
1da177e4 LT |
2453 | kfree(mtd->eraseregions); |
2454 | } | |
2455 | ||
1da177e4 LT |
2456 | MODULE_LICENSE("GPL"); |
2457 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org> et al."); | |
2458 | MODULE_DESCRIPTION("MTD chip driver for Intel/Sharp flash chips"); | |
a15bdeef DW |
2459 | MODULE_ALIAS("cfi_cmdset_0003"); |
2460 | MODULE_ALIAS("cfi_cmdset_0200"); |