Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Common Flash Interface support: |
| 3 | * Intel Extended Vendor Command Set (ID 0x0001) |
| 4 | * |
| 5 | * (C) 2000 Red Hat. GPL'd |
| 6 | * |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 7 | * $Id: cfi_cmdset_0001.c,v 1.182 2005/08/06 04:40:41 nico Exp $ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * |
| 9 | * |
| 10 | * 10/10/2000 Nicolas Pitre <nico@cam.org> |
| 11 | * - completely revamped method functions so they are aware and |
| 12 | * independent of the flash geometry (buswidth, interleave, etc.) |
| 13 | * - scalability vs code size is completely set at compile-time |
| 14 | * (see include/linux/mtd/cfi.h for selection) |
| 15 | * - optimized write buffer method |
| 16 | * 02/05/2002 Christopher Hoover <ch@hpl.hp.com>/<ch@murgatroid.com> |
| 17 | * - reworked lock/unlock/erase support for var size flash |
| 18 | */ |
| 19 | |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/types.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/sched.h> |
| 24 | #include <linux/init.h> |
| 25 | #include <asm/io.h> |
| 26 | #include <asm/byteorder.h> |
| 27 | |
| 28 | #include <linux/errno.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/delay.h> |
| 31 | #include <linux/interrupt.h> |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 32 | #include <linux/reboot.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/mtd/xip.h> |
| 34 | #include <linux/mtd/map.h> |
| 35 | #include <linux/mtd/mtd.h> |
| 36 | #include <linux/mtd/compatmac.h> |
| 37 | #include <linux/mtd/cfi.h> |
| 38 | |
| 39 | /* #define CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE */ |
| 40 | /* #define CMDSET0001_DISABLE_WRITE_SUSPEND */ |
| 41 | |
| 42 | // debugging, turns off buffer write mode if set to 1 |
| 43 | #define FORCE_WORD_WRITE 0 |
| 44 | |
| 45 | #define MANUFACTURER_INTEL 0x0089 |
| 46 | #define I82802AB 0x00ad |
| 47 | #define I82802AC 0x00ac |
| 48 | #define MANUFACTURER_ST 0x0020 |
| 49 | #define M50LPW080 0x002F |
| 50 | |
| 51 | static int cfi_intelext_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | static int cfi_intelext_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); |
| 53 | static int cfi_intelext_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); |
| 54 | static int cfi_intelext_erase_varsize(struct mtd_info *, struct erase_info *); |
| 55 | static void cfi_intelext_sync (struct mtd_info *); |
| 56 | static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, size_t len); |
| 57 | static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, size_t len); |
Todd Poynor | 8048d2f | 2005-03-31 00:57:33 +0100 | [diff] [blame] | 58 | #ifdef CONFIG_MTD_OTP |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 59 | static int cfi_intelext_read_fact_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *); |
| 60 | static int cfi_intelext_read_user_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *); |
| 61 | static int cfi_intelext_write_user_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *); |
| 62 | static int cfi_intelext_lock_user_prot_reg (struct mtd_info *, loff_t, size_t); |
| 63 | static int cfi_intelext_get_fact_prot_info (struct mtd_info *, |
| 64 | struct otp_info *, size_t); |
| 65 | static int cfi_intelext_get_user_prot_info (struct mtd_info *, |
| 66 | struct otp_info *, size_t); |
Todd Poynor | 8048d2f | 2005-03-31 00:57:33 +0100 | [diff] [blame] | 67 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | static int cfi_intelext_suspend (struct mtd_info *); |
| 69 | static void cfi_intelext_resume (struct mtd_info *); |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 70 | static int cfi_intelext_reboot (struct notifier_block *, unsigned long, void *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
| 72 | static void cfi_intelext_destroy(struct mtd_info *); |
| 73 | |
| 74 | struct mtd_info *cfi_cmdset_0001(struct map_info *, int); |
| 75 | |
| 76 | static struct mtd_info *cfi_intelext_setup (struct mtd_info *); |
| 77 | static int cfi_intelext_partition_fixup(struct mtd_info *, struct cfi_private **); |
| 78 | |
| 79 | static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, |
| 80 | size_t *retlen, u_char **mtdbuf); |
| 81 | static void cfi_intelext_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, |
| 82 | size_t len); |
| 83 | |
| 84 | static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode); |
| 85 | static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr); |
| 86 | #include "fwh_lock.h" |
| 87 | |
| 88 | |
| 89 | |
| 90 | /* |
| 91 | * *********** SETUP AND PROBE BITS *********** |
| 92 | */ |
| 93 | |
| 94 | static struct mtd_chip_driver cfi_intelext_chipdrv = { |
| 95 | .probe = NULL, /* Not usable directly */ |
| 96 | .destroy = cfi_intelext_destroy, |
| 97 | .name = "cfi_cmdset_0001", |
| 98 | .module = THIS_MODULE |
| 99 | }; |
| 100 | |
| 101 | /* #define DEBUG_LOCK_BITS */ |
| 102 | /* #define DEBUG_CFI_FEATURES */ |
| 103 | |
| 104 | #ifdef DEBUG_CFI_FEATURES |
| 105 | static void cfi_tell_features(struct cfi_pri_intelext *extp) |
| 106 | { |
| 107 | int i; |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 108 | printk(" Extended Query version %c.%c\n", extp->MajorVersion, extp->MinorVersion); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | printk(" Feature/Command Support: %4.4X\n", extp->FeatureSupport); |
| 110 | printk(" - Chip Erase: %s\n", extp->FeatureSupport&1?"supported":"unsupported"); |
| 111 | printk(" - Suspend Erase: %s\n", extp->FeatureSupport&2?"supported":"unsupported"); |
| 112 | printk(" - Suspend Program: %s\n", extp->FeatureSupport&4?"supported":"unsupported"); |
| 113 | printk(" - Legacy Lock/Unlock: %s\n", extp->FeatureSupport&8?"supported":"unsupported"); |
| 114 | printk(" - Queued Erase: %s\n", extp->FeatureSupport&16?"supported":"unsupported"); |
| 115 | printk(" - Instant block lock: %s\n", extp->FeatureSupport&32?"supported":"unsupported"); |
| 116 | printk(" - Protection Bits: %s\n", extp->FeatureSupport&64?"supported":"unsupported"); |
| 117 | printk(" - Page-mode read: %s\n", extp->FeatureSupport&128?"supported":"unsupported"); |
| 118 | printk(" - Synchronous read: %s\n", extp->FeatureSupport&256?"supported":"unsupported"); |
| 119 | printk(" - Simultaneous operations: %s\n", extp->FeatureSupport&512?"supported":"unsupported"); |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 120 | printk(" - Extended Flash Array: %s\n", extp->FeatureSupport&1024?"supported":"unsupported"); |
| 121 | for (i=11; i<32; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | if (extp->FeatureSupport & (1<<i)) |
| 123 | printk(" - Unknown Bit %X: supported\n", i); |
| 124 | } |
| 125 | |
| 126 | printk(" Supported functions after Suspend: %2.2X\n", extp->SuspendCmdSupport); |
| 127 | printk(" - Program after Erase Suspend: %s\n", extp->SuspendCmdSupport&1?"supported":"unsupported"); |
| 128 | for (i=1; i<8; i++) { |
| 129 | if (extp->SuspendCmdSupport & (1<<i)) |
| 130 | printk(" - Unknown Bit %X: supported\n", i); |
| 131 | } |
| 132 | |
| 133 | printk(" Block Status Register Mask: %4.4X\n", extp->BlkStatusRegMask); |
| 134 | printk(" - Lock Bit Active: %s\n", extp->BlkStatusRegMask&1?"yes":"no"); |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 135 | printk(" - Lock-Down Bit Active: %s\n", extp->BlkStatusRegMask&2?"yes":"no"); |
| 136 | for (i=2; i<3; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | if (extp->BlkStatusRegMask & (1<<i)) |
| 138 | printk(" - Unknown Bit %X Active: yes\n",i); |
| 139 | } |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 140 | printk(" - EFA Lock Bit: %s\n", extp->BlkStatusRegMask&16?"yes":"no"); |
| 141 | printk(" - EFA Lock-Down Bit: %s\n", extp->BlkStatusRegMask&32?"yes":"no"); |
| 142 | for (i=6; i<16; i++) { |
| 143 | if (extp->BlkStatusRegMask & (1<<i)) |
| 144 | printk(" - Unknown Bit %X Active: yes\n",i); |
| 145 | } |
| 146 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | printk(" Vcc Logic Supply Optimum Program/Erase Voltage: %d.%d V\n", |
| 148 | extp->VccOptimal >> 4, extp->VccOptimal & 0xf); |
| 149 | if (extp->VppOptimal) |
| 150 | printk(" Vpp Programming Supply Optimum Program/Erase Voltage: %d.%d V\n", |
| 151 | extp->VppOptimal >> 4, extp->VppOptimal & 0xf); |
| 152 | } |
| 153 | #endif |
| 154 | |
| 155 | #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE |
| 156 | /* Some Intel Strata Flash prior to FPO revision C has bugs in this area */ |
| 157 | static void fixup_intel_strataflash(struct mtd_info *mtd, void* param) |
| 158 | { |
| 159 | struct map_info *map = mtd->priv; |
| 160 | struct cfi_private *cfi = map->fldrv_priv; |
| 161 | struct cfi_pri_amdstd *extp = cfi->cmdset_priv; |
| 162 | |
| 163 | printk(KERN_WARNING "cfi_cmdset_0001: Suspend " |
| 164 | "erase on write disabled.\n"); |
| 165 | extp->SuspendCmdSupport &= ~1; |
| 166 | } |
| 167 | #endif |
| 168 | |
| 169 | #ifdef CMDSET0001_DISABLE_WRITE_SUSPEND |
| 170 | static void fixup_no_write_suspend(struct mtd_info *mtd, void* param) |
| 171 | { |
| 172 | struct map_info *map = mtd->priv; |
| 173 | struct cfi_private *cfi = map->fldrv_priv; |
| 174 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; |
| 175 | |
| 176 | if (cfip && (cfip->FeatureSupport&4)) { |
| 177 | cfip->FeatureSupport &= ~4; |
| 178 | printk(KERN_WARNING "cfi_cmdset_0001: write suspend disabled\n"); |
| 179 | } |
| 180 | } |
| 181 | #endif |
| 182 | |
| 183 | static void fixup_st_m28w320ct(struct mtd_info *mtd, void* param) |
| 184 | { |
| 185 | struct map_info *map = mtd->priv; |
| 186 | struct cfi_private *cfi = map->fldrv_priv; |
| 187 | |
| 188 | cfi->cfiq->BufWriteTimeoutTyp = 0; /* Not supported */ |
| 189 | cfi->cfiq->BufWriteTimeoutMax = 0; /* Not supported */ |
| 190 | } |
| 191 | |
| 192 | static void fixup_st_m28w320cb(struct mtd_info *mtd, void* param) |
| 193 | { |
| 194 | struct map_info *map = mtd->priv; |
| 195 | struct cfi_private *cfi = map->fldrv_priv; |
| 196 | |
| 197 | /* Note this is done after the region info is endian swapped */ |
| 198 | cfi->cfiq->EraseRegionInfo[1] = |
| 199 | (cfi->cfiq->EraseRegionInfo[1] & 0xffff0000) | 0x3e; |
| 200 | }; |
| 201 | |
| 202 | static void fixup_use_point(struct mtd_info *mtd, void *param) |
| 203 | { |
| 204 | struct map_info *map = mtd->priv; |
| 205 | if (!mtd->point && map_is_linear(map)) { |
| 206 | mtd->point = cfi_intelext_point; |
| 207 | mtd->unpoint = cfi_intelext_unpoint; |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | static void fixup_use_write_buffers(struct mtd_info *mtd, void *param) |
| 212 | { |
| 213 | struct map_info *map = mtd->priv; |
| 214 | struct cfi_private *cfi = map->fldrv_priv; |
| 215 | if (cfi->cfiq->BufWriteTimeoutTyp) { |
| 216 | printk(KERN_INFO "Using buffer write method\n" ); |
| 217 | mtd->write = cfi_intelext_write_buffers; |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | static struct cfi_fixup cfi_fixup_table[] = { |
| 222 | #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE |
| 223 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_intel_strataflash, NULL }, |
| 224 | #endif |
| 225 | #ifdef CMDSET0001_DISABLE_WRITE_SUSPEND |
| 226 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_no_write_suspend, NULL }, |
| 227 | #endif |
| 228 | #if !FORCE_WORD_WRITE |
| 229 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL }, |
| 230 | #endif |
| 231 | { CFI_MFR_ST, 0x00ba, /* M28W320CT */ fixup_st_m28w320ct, NULL }, |
| 232 | { CFI_MFR_ST, 0x00bb, /* M28W320CB */ fixup_st_m28w320cb, NULL }, |
| 233 | { 0, 0, NULL, NULL } |
| 234 | }; |
| 235 | |
| 236 | static struct cfi_fixup jedec_fixup_table[] = { |
| 237 | { MANUFACTURER_INTEL, I82802AB, fixup_use_fwh_lock, NULL, }, |
| 238 | { MANUFACTURER_INTEL, I82802AC, fixup_use_fwh_lock, NULL, }, |
| 239 | { MANUFACTURER_ST, M50LPW080, fixup_use_fwh_lock, NULL, }, |
| 240 | { 0, 0, NULL, NULL } |
| 241 | }; |
| 242 | static struct cfi_fixup fixup_table[] = { |
| 243 | /* The CFI vendor ids and the JEDEC vendor IDs appear |
| 244 | * to be common. It is like the devices id's are as |
| 245 | * well. This table is to pick all cases where |
| 246 | * we know that is the case. |
| 247 | */ |
| 248 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_point, NULL }, |
| 249 | { 0, 0, NULL, NULL } |
| 250 | }; |
| 251 | |
| 252 | static inline struct cfi_pri_intelext * |
| 253 | read_pri_intelext(struct map_info *map, __u16 adr) |
| 254 | { |
| 255 | struct cfi_pri_intelext *extp; |
| 256 | unsigned int extp_size = sizeof(*extp); |
| 257 | |
| 258 | again: |
| 259 | extp = (struct cfi_pri_intelext *)cfi_read_pri(map, adr, extp_size, "Intel/Sharp"); |
| 260 | if (!extp) |
| 261 | return NULL; |
| 262 | |
Todd Poynor | d88f977 | 2005-07-20 22:01:17 +0100 | [diff] [blame] | 263 | if (extp->MajorVersion != '1' || |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 264 | (extp->MinorVersion < '0' || extp->MinorVersion > '4')) { |
Todd Poynor | d88f977 | 2005-07-20 22:01:17 +0100 | [diff] [blame] | 265 | printk(KERN_ERR " Unknown Intel/Sharp Extended Query " |
| 266 | "version %c.%c.\n", extp->MajorVersion, |
| 267 | extp->MinorVersion); |
| 268 | kfree(extp); |
| 269 | return NULL; |
| 270 | } |
| 271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | /* Do some byteswapping if necessary */ |
| 273 | extp->FeatureSupport = le32_to_cpu(extp->FeatureSupport); |
| 274 | extp->BlkStatusRegMask = le16_to_cpu(extp->BlkStatusRegMask); |
| 275 | extp->ProtRegAddr = le16_to_cpu(extp->ProtRegAddr); |
| 276 | |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 277 | if (extp->MajorVersion == '1' && extp->MinorVersion >= '3') { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | unsigned int extra_size = 0; |
| 279 | int nb_parts, i; |
| 280 | |
| 281 | /* Protection Register info */ |
Nicolas Pitre | 72b56a2 | 2005-02-05 02:06:19 +0000 | [diff] [blame] | 282 | extra_size += (extp->NumProtectionFields - 1) * |
| 283 | sizeof(struct cfi_intelext_otpinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
| 285 | /* Burst Read info */ |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 286 | extra_size += (extp->MinorVersion < '4') ? 6 : 5; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
| 288 | /* Number of hardware-partitions */ |
| 289 | extra_size += 1; |
| 290 | if (extp_size < sizeof(*extp) + extra_size) |
| 291 | goto need_more; |
| 292 | nb_parts = extp->extra[extra_size - 1]; |
| 293 | |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 294 | /* skip the sizeof(partregion) field in CFI 1.4 */ |
| 295 | if (extp->MinorVersion >= '4') |
| 296 | extra_size += 2; |
| 297 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | for (i = 0; i < nb_parts; i++) { |
| 299 | struct cfi_intelext_regioninfo *rinfo; |
| 300 | rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[extra_size]; |
| 301 | extra_size += sizeof(*rinfo); |
| 302 | if (extp_size < sizeof(*extp) + extra_size) |
| 303 | goto need_more; |
| 304 | rinfo->NumIdentPartitions=le16_to_cpu(rinfo->NumIdentPartitions); |
| 305 | extra_size += (rinfo->NumBlockTypes - 1) |
| 306 | * sizeof(struct cfi_intelext_blockinfo); |
| 307 | } |
| 308 | |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 309 | if (extp->MinorVersion >= '4') |
| 310 | extra_size += sizeof(struct cfi_intelext_programming_regioninfo); |
| 311 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | if (extp_size < sizeof(*extp) + extra_size) { |
| 313 | need_more: |
| 314 | extp_size = sizeof(*extp) + extra_size; |
| 315 | kfree(extp); |
| 316 | if (extp_size > 4096) { |
| 317 | printk(KERN_ERR |
| 318 | "%s: cfi_pri_intelext is too fat\n", |
| 319 | __FUNCTION__); |
| 320 | return NULL; |
| 321 | } |
| 322 | goto again; |
| 323 | } |
| 324 | } |
| 325 | |
| 326 | return extp; |
| 327 | } |
| 328 | |
| 329 | /* This routine is made available to other mtd code via |
| 330 | * inter_module_register. It must only be accessed through |
| 331 | * inter_module_get which will bump the use count of this module. The |
| 332 | * addresses passed back in cfi are valid as long as the use count of |
| 333 | * this module is non-zero, i.e. between inter_module_get and |
| 334 | * inter_module_put. Keith Owens <kaos@ocs.com.au> 29 Oct 2000. |
| 335 | */ |
| 336 | struct mtd_info *cfi_cmdset_0001(struct map_info *map, int primary) |
| 337 | { |
| 338 | struct cfi_private *cfi = map->fldrv_priv; |
| 339 | struct mtd_info *mtd; |
| 340 | int i; |
| 341 | |
| 342 | mtd = kmalloc(sizeof(*mtd), GFP_KERNEL); |
| 343 | if (!mtd) { |
| 344 | printk(KERN_ERR "Failed to allocate memory for MTD device\n"); |
| 345 | return NULL; |
| 346 | } |
| 347 | memset(mtd, 0, sizeof(*mtd)); |
| 348 | mtd->priv = map; |
| 349 | mtd->type = MTD_NORFLASH; |
| 350 | |
| 351 | /* Fill in the default mtd operations */ |
| 352 | mtd->erase = cfi_intelext_erase_varsize; |
| 353 | mtd->read = cfi_intelext_read; |
| 354 | mtd->write = cfi_intelext_write_words; |
| 355 | mtd->sync = cfi_intelext_sync; |
| 356 | mtd->lock = cfi_intelext_lock; |
| 357 | mtd->unlock = cfi_intelext_unlock; |
| 358 | mtd->suspend = cfi_intelext_suspend; |
| 359 | mtd->resume = cfi_intelext_resume; |
| 360 | mtd->flags = MTD_CAP_NORFLASH; |
| 361 | mtd->name = map->name; |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 362 | |
| 363 | mtd->reboot_notifier.notifier_call = cfi_intelext_reboot; |
| 364 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | if (cfi->cfi_mode == CFI_MODE_CFI) { |
| 366 | /* |
| 367 | * It's a real CFI chip, not one for which the probe |
| 368 | * routine faked a CFI structure. So we read the feature |
| 369 | * table from it. |
| 370 | */ |
| 371 | __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR; |
| 372 | struct cfi_pri_intelext *extp; |
| 373 | |
| 374 | extp = read_pri_intelext(map, adr); |
| 375 | if (!extp) { |
| 376 | kfree(mtd); |
| 377 | return NULL; |
| 378 | } |
| 379 | |
| 380 | /* Install our own private info structure */ |
| 381 | cfi->cmdset_priv = extp; |
| 382 | |
| 383 | cfi_fixup(mtd, cfi_fixup_table); |
| 384 | |
| 385 | #ifdef DEBUG_CFI_FEATURES |
| 386 | /* Tell the user about it in lots of lovely detail */ |
| 387 | cfi_tell_features(extp); |
| 388 | #endif |
| 389 | |
| 390 | if(extp->SuspendCmdSupport & 1) { |
| 391 | printk(KERN_NOTICE "cfi_cmdset_0001: Erase suspend on write enabled\n"); |
| 392 | } |
| 393 | } |
| 394 | else if (cfi->cfi_mode == CFI_MODE_JEDEC) { |
| 395 | /* Apply jedec specific fixups */ |
| 396 | cfi_fixup(mtd, jedec_fixup_table); |
| 397 | } |
| 398 | /* Apply generic fixups */ |
| 399 | cfi_fixup(mtd, fixup_table); |
| 400 | |
| 401 | for (i=0; i< cfi->numchips; i++) { |
| 402 | cfi->chips[i].word_write_time = 1<<cfi->cfiq->WordWriteTimeoutTyp; |
| 403 | cfi->chips[i].buffer_write_time = 1<<cfi->cfiq->BufWriteTimeoutTyp; |
| 404 | cfi->chips[i].erase_time = 1<<cfi->cfiq->BlockEraseTimeoutTyp; |
| 405 | cfi->chips[i].ref_point_counter = 0; |
| 406 | } |
| 407 | |
| 408 | map->fldrv = &cfi_intelext_chipdrv; |
| 409 | |
| 410 | return cfi_intelext_setup(mtd); |
| 411 | } |
| 412 | |
| 413 | static struct mtd_info *cfi_intelext_setup(struct mtd_info *mtd) |
| 414 | { |
| 415 | struct map_info *map = mtd->priv; |
| 416 | struct cfi_private *cfi = map->fldrv_priv; |
| 417 | unsigned long offset = 0; |
| 418 | int i,j; |
| 419 | unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave; |
| 420 | |
| 421 | //printk(KERN_DEBUG "number of CFI chips: %d\n", cfi->numchips); |
| 422 | |
| 423 | mtd->size = devsize * cfi->numchips; |
| 424 | |
| 425 | mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips; |
| 426 | mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) |
| 427 | * mtd->numeraseregions, GFP_KERNEL); |
| 428 | if (!mtd->eraseregions) { |
| 429 | printk(KERN_ERR "Failed to allocate memory for MTD erase region info\n"); |
| 430 | goto setup_err; |
| 431 | } |
| 432 | |
| 433 | for (i=0; i<cfi->cfiq->NumEraseRegions; i++) { |
| 434 | unsigned long ernum, ersize; |
| 435 | ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave; |
| 436 | ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1; |
| 437 | |
| 438 | if (mtd->erasesize < ersize) { |
| 439 | mtd->erasesize = ersize; |
| 440 | } |
| 441 | for (j=0; j<cfi->numchips; j++) { |
| 442 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset; |
| 443 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize; |
| 444 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum; |
| 445 | } |
| 446 | offset += (ersize * ernum); |
| 447 | } |
| 448 | |
| 449 | if (offset != devsize) { |
| 450 | /* Argh */ |
| 451 | printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize); |
| 452 | goto setup_err; |
| 453 | } |
| 454 | |
| 455 | for (i=0; i<mtd->numeraseregions;i++){ |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 456 | printk(KERN_DEBUG "erase region %d: offset=0x%x,size=0x%x,blocks=%d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | i,mtd->eraseregions[i].offset, |
| 458 | mtd->eraseregions[i].erasesize, |
| 459 | mtd->eraseregions[i].numblocks); |
| 460 | } |
| 461 | |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 462 | #ifdef CONFIG_MTD_OTP |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | mtd->read_fact_prot_reg = cfi_intelext_read_fact_prot_reg; |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 464 | mtd->read_user_prot_reg = cfi_intelext_read_user_prot_reg; |
| 465 | mtd->write_user_prot_reg = cfi_intelext_write_user_prot_reg; |
| 466 | mtd->lock_user_prot_reg = cfi_intelext_lock_user_prot_reg; |
| 467 | mtd->get_fact_prot_info = cfi_intelext_get_fact_prot_info; |
| 468 | mtd->get_user_prot_info = cfi_intelext_get_user_prot_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | #endif |
| 470 | |
| 471 | /* This function has the potential to distort the reality |
| 472 | a bit and therefore should be called last. */ |
| 473 | if (cfi_intelext_partition_fixup(mtd, &cfi) != 0) |
| 474 | goto setup_err; |
| 475 | |
| 476 | __module_get(THIS_MODULE); |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 477 | register_reboot_notifier(&mtd->reboot_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | return mtd; |
| 479 | |
| 480 | setup_err: |
| 481 | if(mtd) { |
| 482 | if(mtd->eraseregions) |
| 483 | kfree(mtd->eraseregions); |
| 484 | kfree(mtd); |
| 485 | } |
| 486 | kfree(cfi->cmdset_priv); |
| 487 | return NULL; |
| 488 | } |
| 489 | |
| 490 | static int cfi_intelext_partition_fixup(struct mtd_info *mtd, |
| 491 | struct cfi_private **pcfi) |
| 492 | { |
| 493 | struct map_info *map = mtd->priv; |
| 494 | struct cfi_private *cfi = *pcfi; |
| 495 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
| 496 | |
| 497 | /* |
| 498 | * Probing of multi-partition flash ships. |
| 499 | * |
| 500 | * To support multiple partitions when available, we simply arrange |
| 501 | * for each of them to have their own flchip structure even if they |
| 502 | * are on the same physical chip. This means completely recreating |
| 503 | * a new cfi_private structure right here which is a blatent code |
| 504 | * layering violation, but this is still the least intrusive |
| 505 | * arrangement at this point. This can be rearranged in the future |
| 506 | * if someone feels motivated enough. --nico |
| 507 | */ |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 508 | if (extp && extp->MajorVersion == '1' && extp->MinorVersion >= '3' |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | && extp->FeatureSupport & (1 << 9)) { |
| 510 | struct cfi_private *newcfi; |
| 511 | struct flchip *chip; |
| 512 | struct flchip_shared *shared; |
| 513 | int offs, numregions, numparts, partshift, numvirtchips, i, j; |
| 514 | |
| 515 | /* Protection Register info */ |
Nicolas Pitre | 72b56a2 | 2005-02-05 02:06:19 +0000 | [diff] [blame] | 516 | offs = (extp->NumProtectionFields - 1) * |
| 517 | sizeof(struct cfi_intelext_otpinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | |
| 519 | /* Burst Read info */ |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 520 | offs += (extp->MinorVersion < '4') ? 6 : 5; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | |
| 522 | /* Number of partition regions */ |
| 523 | numregions = extp->extra[offs]; |
| 524 | offs += 1; |
| 525 | |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 526 | /* skip the sizeof(partregion) field in CFI 1.4 */ |
| 527 | if (extp->MinorVersion >= '4') |
| 528 | offs += 2; |
| 529 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | /* Number of hardware partitions */ |
| 531 | numparts = 0; |
| 532 | for (i = 0; i < numregions; i++) { |
| 533 | struct cfi_intelext_regioninfo *rinfo; |
| 534 | rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[offs]; |
| 535 | numparts += rinfo->NumIdentPartitions; |
| 536 | offs += sizeof(*rinfo) |
| 537 | + (rinfo->NumBlockTypes - 1) * |
| 538 | sizeof(struct cfi_intelext_blockinfo); |
| 539 | } |
| 540 | |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 541 | /* Programming Region info */ |
| 542 | if (extp->MinorVersion >= '4') { |
| 543 | struct cfi_intelext_programming_regioninfo *prinfo; |
| 544 | prinfo = (struct cfi_intelext_programming_regioninfo *)&extp->extra[offs]; |
| 545 | MTD_PROGREGION_SIZE(mtd) = cfi->interleave << prinfo->ProgRegShift; |
| 546 | MTD_PROGREGION_CTRLMODE_VALID(mtd) = cfi->interleave * prinfo->ControlValid; |
| 547 | MTD_PROGREGION_CTRLMODE_INVALID(mtd) = cfi->interleave * prinfo->ControlInvalid; |
| 548 | mtd->flags |= MTD_PROGRAM_REGIONS; |
| 549 | printk(KERN_DEBUG "%s: program region size/ctrl_valid/ctrl_inval = %d/%d/%d\n", |
| 550 | map->name, MTD_PROGREGION_SIZE(mtd), |
| 551 | MTD_PROGREGION_CTRLMODE_VALID(mtd), |
| 552 | MTD_PROGREGION_CTRLMODE_INVALID(mtd)); |
| 553 | } |
| 554 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | /* |
| 556 | * All functions below currently rely on all chips having |
| 557 | * the same geometry so we'll just assume that all hardware |
| 558 | * partitions are of the same size too. |
| 559 | */ |
| 560 | partshift = cfi->chipshift - __ffs(numparts); |
| 561 | |
| 562 | if ((1 << partshift) < mtd->erasesize) { |
| 563 | printk( KERN_ERR |
| 564 | "%s: bad number of hw partitions (%d)\n", |
| 565 | __FUNCTION__, numparts); |
| 566 | return -EINVAL; |
| 567 | } |
| 568 | |
| 569 | numvirtchips = cfi->numchips * numparts; |
| 570 | newcfi = kmalloc(sizeof(struct cfi_private) + numvirtchips * sizeof(struct flchip), GFP_KERNEL); |
| 571 | if (!newcfi) |
| 572 | return -ENOMEM; |
| 573 | shared = kmalloc(sizeof(struct flchip_shared) * cfi->numchips, GFP_KERNEL); |
| 574 | if (!shared) { |
| 575 | kfree(newcfi); |
| 576 | return -ENOMEM; |
| 577 | } |
| 578 | memcpy(newcfi, cfi, sizeof(struct cfi_private)); |
| 579 | newcfi->numchips = numvirtchips; |
| 580 | newcfi->chipshift = partshift; |
| 581 | |
| 582 | chip = &newcfi->chips[0]; |
| 583 | for (i = 0; i < cfi->numchips; i++) { |
| 584 | shared[i].writing = shared[i].erasing = NULL; |
| 585 | spin_lock_init(&shared[i].lock); |
| 586 | for (j = 0; j < numparts; j++) { |
| 587 | *chip = cfi->chips[i]; |
| 588 | chip->start += j << partshift; |
| 589 | chip->priv = &shared[i]; |
| 590 | /* those should be reset too since |
| 591 | they create memory references. */ |
| 592 | init_waitqueue_head(&chip->wq); |
| 593 | spin_lock_init(&chip->_spinlock); |
| 594 | chip->mutex = &chip->_spinlock; |
| 595 | chip++; |
| 596 | } |
| 597 | } |
| 598 | |
| 599 | printk(KERN_DEBUG "%s: %d set(s) of %d interleaved chips " |
| 600 | "--> %d partitions of %d KiB\n", |
| 601 | map->name, cfi->numchips, cfi->interleave, |
| 602 | newcfi->numchips, 1<<(newcfi->chipshift-10)); |
| 603 | |
| 604 | map->fldrv_priv = newcfi; |
| 605 | *pcfi = newcfi; |
| 606 | kfree(cfi); |
| 607 | } |
| 608 | |
| 609 | return 0; |
| 610 | } |
| 611 | |
| 612 | /* |
| 613 | * *********** CHIP ACCESS FUNCTIONS *********** |
| 614 | */ |
| 615 | |
| 616 | static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode) |
| 617 | { |
| 618 | DECLARE_WAITQUEUE(wait, current); |
| 619 | struct cfi_private *cfi = map->fldrv_priv; |
| 620 | map_word status, status_OK = CMD(0x80), status_PWS = CMD(0x01); |
| 621 | unsigned long timeo; |
| 622 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; |
| 623 | |
| 624 | resettime: |
| 625 | timeo = jiffies + HZ; |
| 626 | retry: |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 627 | if (chip->priv && (mode == FL_WRITING || mode == FL_ERASING || mode == FL_OTP_WRITE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | /* |
| 629 | * OK. We have possibility for contension on the write/erase |
| 630 | * operations which are global to the real chip and not per |
| 631 | * partition. So let's fight it over in the partition which |
| 632 | * currently has authority on the operation. |
| 633 | * |
| 634 | * The rules are as follows: |
| 635 | * |
| 636 | * - any write operation must own shared->writing. |
| 637 | * |
| 638 | * - any erase operation must own _both_ shared->writing and |
| 639 | * shared->erasing. |
| 640 | * |
| 641 | * - contension arbitration is handled in the owner's context. |
| 642 | * |
| 643 | * The 'shared' struct can be read when its lock is taken. |
| 644 | * However any writes to it can only be made when the current |
| 645 | * owner's lock is also held. |
| 646 | */ |
| 647 | struct flchip_shared *shared = chip->priv; |
| 648 | struct flchip *contender; |
| 649 | spin_lock(&shared->lock); |
| 650 | contender = shared->writing; |
| 651 | if (contender && contender != chip) { |
| 652 | /* |
| 653 | * The engine to perform desired operation on this |
| 654 | * partition is already in use by someone else. |
| 655 | * Let's fight over it in the context of the chip |
| 656 | * currently using it. If it is possible to suspend, |
| 657 | * that other partition will do just that, otherwise |
| 658 | * it'll happily send us to sleep. In any case, when |
| 659 | * get_chip returns success we're clear to go ahead. |
| 660 | */ |
| 661 | int ret = spin_trylock(contender->mutex); |
| 662 | spin_unlock(&shared->lock); |
| 663 | if (!ret) |
| 664 | goto retry; |
| 665 | spin_unlock(chip->mutex); |
| 666 | ret = get_chip(map, contender, contender->start, mode); |
| 667 | spin_lock(chip->mutex); |
| 668 | if (ret) { |
| 669 | spin_unlock(contender->mutex); |
| 670 | return ret; |
| 671 | } |
| 672 | timeo = jiffies + HZ; |
| 673 | spin_lock(&shared->lock); |
| 674 | } |
| 675 | |
| 676 | /* We now own it */ |
| 677 | shared->writing = chip; |
| 678 | if (mode == FL_ERASING) |
| 679 | shared->erasing = chip; |
| 680 | if (contender && contender != chip) |
| 681 | spin_unlock(contender->mutex); |
| 682 | spin_unlock(&shared->lock); |
| 683 | } |
| 684 | |
| 685 | switch (chip->state) { |
| 686 | |
| 687 | case FL_STATUS: |
| 688 | for (;;) { |
| 689 | status = map_read(map, adr); |
| 690 | if (map_word_andequal(map, status, status_OK, status_OK)) |
| 691 | break; |
| 692 | |
| 693 | /* At this point we're fine with write operations |
| 694 | in other partitions as they don't conflict. */ |
| 695 | if (chip->priv && map_word_andequal(map, status, status_PWS, status_PWS)) |
| 696 | break; |
| 697 | |
| 698 | if (time_after(jiffies, timeo)) { |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 699 | printk(KERN_ERR "%s: Waiting for chip to be ready timed out. Status %lx\n", |
| 700 | map->name, status.x[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | return -EIO; |
| 702 | } |
| 703 | spin_unlock(chip->mutex); |
| 704 | cfi_udelay(1); |
| 705 | spin_lock(chip->mutex); |
| 706 | /* Someone else might have been playing with it. */ |
| 707 | goto retry; |
| 708 | } |
| 709 | |
| 710 | case FL_READY: |
| 711 | case FL_CFI_QUERY: |
| 712 | case FL_JEDEC_QUERY: |
| 713 | return 0; |
| 714 | |
| 715 | case FL_ERASING: |
| 716 | if (!cfip || |
| 717 | !(cfip->FeatureSupport & 2) || |
| 718 | !(mode == FL_READY || mode == FL_POINT || |
| 719 | (mode == FL_WRITING && (cfip->SuspendCmdSupport & 1)))) |
| 720 | goto sleep; |
| 721 | |
| 722 | |
| 723 | /* Erase suspend */ |
| 724 | map_write(map, CMD(0xB0), adr); |
| 725 | |
| 726 | /* If the flash has finished erasing, then 'erase suspend' |
| 727 | * appears to make some (28F320) flash devices switch to |
| 728 | * 'read' mode. Make sure that we switch to 'read status' |
| 729 | * mode so we get the right data. --rmk |
| 730 | */ |
| 731 | map_write(map, CMD(0x70), adr); |
| 732 | chip->oldstate = FL_ERASING; |
| 733 | chip->state = FL_ERASE_SUSPENDING; |
| 734 | chip->erase_suspended = 1; |
| 735 | for (;;) { |
| 736 | status = map_read(map, adr); |
| 737 | if (map_word_andequal(map, status, status_OK, status_OK)) |
| 738 | break; |
| 739 | |
| 740 | if (time_after(jiffies, timeo)) { |
| 741 | /* Urgh. Resume and pretend we weren't here. */ |
| 742 | map_write(map, CMD(0xd0), adr); |
| 743 | /* Make sure we're in 'read status' mode if it had finished */ |
| 744 | map_write(map, CMD(0x70), adr); |
| 745 | chip->state = FL_ERASING; |
| 746 | chip->oldstate = FL_READY; |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 747 | printk(KERN_ERR "%s: Chip not ready after erase " |
| 748 | "suspended: status = 0x%lx\n", map->name, status.x[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | return -EIO; |
| 750 | } |
| 751 | |
| 752 | spin_unlock(chip->mutex); |
| 753 | cfi_udelay(1); |
| 754 | spin_lock(chip->mutex); |
| 755 | /* Nobody will touch it while it's in state FL_ERASE_SUSPENDING. |
| 756 | So we can just loop here. */ |
| 757 | } |
| 758 | chip->state = FL_STATUS; |
| 759 | return 0; |
| 760 | |
| 761 | case FL_XIP_WHILE_ERASING: |
| 762 | if (mode != FL_READY && mode != FL_POINT && |
| 763 | (mode != FL_WRITING || !cfip || !(cfip->SuspendCmdSupport&1))) |
| 764 | goto sleep; |
| 765 | chip->oldstate = chip->state; |
| 766 | chip->state = FL_READY; |
| 767 | return 0; |
| 768 | |
| 769 | case FL_POINT: |
| 770 | /* Only if there's no operation suspended... */ |
| 771 | if (mode == FL_READY && chip->oldstate == FL_READY) |
| 772 | return 0; |
| 773 | |
| 774 | default: |
| 775 | sleep: |
| 776 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 777 | add_wait_queue(&chip->wq, &wait); |
| 778 | spin_unlock(chip->mutex); |
| 779 | schedule(); |
| 780 | remove_wait_queue(&chip->wq, &wait); |
| 781 | spin_lock(chip->mutex); |
| 782 | goto resettime; |
| 783 | } |
| 784 | } |
| 785 | |
| 786 | static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr) |
| 787 | { |
| 788 | struct cfi_private *cfi = map->fldrv_priv; |
| 789 | |
| 790 | if (chip->priv) { |
| 791 | struct flchip_shared *shared = chip->priv; |
| 792 | spin_lock(&shared->lock); |
| 793 | if (shared->writing == chip && chip->oldstate == FL_READY) { |
| 794 | /* We own the ability to write, but we're done */ |
| 795 | shared->writing = shared->erasing; |
| 796 | if (shared->writing && shared->writing != chip) { |
| 797 | /* give back ownership to who we loaned it from */ |
| 798 | struct flchip *loaner = shared->writing; |
| 799 | spin_lock(loaner->mutex); |
| 800 | spin_unlock(&shared->lock); |
| 801 | spin_unlock(chip->mutex); |
| 802 | put_chip(map, loaner, loaner->start); |
| 803 | spin_lock(chip->mutex); |
| 804 | spin_unlock(loaner->mutex); |
| 805 | wake_up(&chip->wq); |
| 806 | return; |
| 807 | } |
| 808 | shared->erasing = NULL; |
| 809 | shared->writing = NULL; |
| 810 | } else if (shared->erasing == chip && shared->writing != chip) { |
| 811 | /* |
| 812 | * We own the ability to erase without the ability |
| 813 | * to write, which means the erase was suspended |
| 814 | * and some other partition is currently writing. |
| 815 | * Don't let the switch below mess things up since |
| 816 | * we don't have ownership to resume anything. |
| 817 | */ |
| 818 | spin_unlock(&shared->lock); |
| 819 | wake_up(&chip->wq); |
| 820 | return; |
| 821 | } |
| 822 | spin_unlock(&shared->lock); |
| 823 | } |
| 824 | |
| 825 | switch(chip->oldstate) { |
| 826 | case FL_ERASING: |
| 827 | chip->state = chip->oldstate; |
| 828 | /* What if one interleaved chip has finished and the |
| 829 | other hasn't? The old code would leave the finished |
| 830 | one in READY mode. That's bad, and caused -EROFS |
| 831 | errors to be returned from do_erase_oneblock because |
| 832 | that's the only bit it checked for at the time. |
| 833 | As the state machine appears to explicitly allow |
| 834 | sending the 0x70 (Read Status) command to an erasing |
| 835 | chip and expecting it to be ignored, that's what we |
| 836 | do. */ |
| 837 | map_write(map, CMD(0xd0), adr); |
| 838 | map_write(map, CMD(0x70), adr); |
| 839 | chip->oldstate = FL_READY; |
| 840 | chip->state = FL_ERASING; |
| 841 | break; |
| 842 | |
| 843 | case FL_XIP_WHILE_ERASING: |
| 844 | chip->state = chip->oldstate; |
| 845 | chip->oldstate = FL_READY; |
| 846 | break; |
| 847 | |
| 848 | case FL_READY: |
| 849 | case FL_STATUS: |
| 850 | case FL_JEDEC_QUERY: |
| 851 | /* We should really make set_vpp() count, rather than doing this */ |
| 852 | DISABLE_VPP(map); |
| 853 | break; |
| 854 | default: |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 855 | printk(KERN_ERR "%s: put_chip() called with oldstate %d!!\n", map->name, chip->oldstate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | } |
| 857 | wake_up(&chip->wq); |
| 858 | } |
| 859 | |
| 860 | #ifdef CONFIG_MTD_XIP |
| 861 | |
| 862 | /* |
| 863 | * No interrupt what so ever can be serviced while the flash isn't in array |
| 864 | * mode. This is ensured by the xip_disable() and xip_enable() functions |
| 865 | * enclosing any code path where the flash is known not to be in array mode. |
| 866 | * And within a XIP disabled code path, only functions marked with __xipram |
| 867 | * may be called and nothing else (it's a good thing to inspect generated |
| 868 | * assembly to make sure inline functions were actually inlined and that gcc |
| 869 | * didn't emit calls to its own support functions). Also configuring MTD CFI |
| 870 | * support to a single buswidth and a single interleave is also recommended. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | */ |
| 872 | |
| 873 | static void xip_disable(struct map_info *map, struct flchip *chip, |
| 874 | unsigned long adr) |
| 875 | { |
| 876 | /* TODO: chips with no XIP use should ignore and return */ |
| 877 | (void) map_read(map, adr); /* ensure mmu mapping is up to date */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | local_irq_disable(); |
| 879 | } |
| 880 | |
| 881 | static void __xipram xip_enable(struct map_info *map, struct flchip *chip, |
| 882 | unsigned long adr) |
| 883 | { |
| 884 | struct cfi_private *cfi = map->fldrv_priv; |
| 885 | if (chip->state != FL_POINT && chip->state != FL_READY) { |
| 886 | map_write(map, CMD(0xff), adr); |
| 887 | chip->state = FL_READY; |
| 888 | } |
| 889 | (void) map_read(map, adr); |
Thomas Gleixner | 97f927a | 2005-07-07 16:50:16 +0200 | [diff] [blame] | 890 | xip_iprefetch(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | local_irq_enable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | } |
| 893 | |
| 894 | /* |
| 895 | * When a delay is required for the flash operation to complete, the |
| 896 | * xip_udelay() function is polling for both the given timeout and pending |
| 897 | * (but still masked) hardware interrupts. Whenever there is an interrupt |
| 898 | * pending then the flash erase or write operation is suspended, array mode |
| 899 | * restored and interrupts unmasked. Task scheduling might also happen at that |
| 900 | * point. The CPU eventually returns from the interrupt or the call to |
| 901 | * schedule() and the suspended flash operation is resumed for the remaining |
| 902 | * of the delay period. |
| 903 | * |
| 904 | * Warning: this function _will_ fool interrupt latency tracing tools. |
| 905 | */ |
| 906 | |
| 907 | static void __xipram xip_udelay(struct map_info *map, struct flchip *chip, |
| 908 | unsigned long adr, int usec) |
| 909 | { |
| 910 | struct cfi_private *cfi = map->fldrv_priv; |
| 911 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; |
| 912 | map_word status, OK = CMD(0x80); |
| 913 | unsigned long suspended, start = xip_currtime(); |
| 914 | flstate_t oldstate, newstate; |
| 915 | |
| 916 | do { |
| 917 | cpu_relax(); |
| 918 | if (xip_irqpending() && cfip && |
| 919 | ((chip->state == FL_ERASING && (cfip->FeatureSupport&2)) || |
| 920 | (chip->state == FL_WRITING && (cfip->FeatureSupport&4))) && |
| 921 | (cfi_interleave_is_1(cfi) || chip->oldstate == FL_READY)) { |
| 922 | /* |
| 923 | * Let's suspend the erase or write operation when |
| 924 | * supported. Note that we currently don't try to |
| 925 | * suspend interleaved chips if there is already |
| 926 | * another operation suspended (imagine what happens |
| 927 | * when one chip was already done with the current |
| 928 | * operation while another chip suspended it, then |
| 929 | * we resume the whole thing at once). Yes, it |
| 930 | * can happen! |
| 931 | */ |
| 932 | map_write(map, CMD(0xb0), adr); |
| 933 | map_write(map, CMD(0x70), adr); |
| 934 | usec -= xip_elapsed_since(start); |
| 935 | suspended = xip_currtime(); |
| 936 | do { |
| 937 | if (xip_elapsed_since(suspended) > 100000) { |
| 938 | /* |
| 939 | * The chip doesn't want to suspend |
| 940 | * after waiting for 100 msecs. |
| 941 | * This is a critical error but there |
| 942 | * is not much we can do here. |
| 943 | */ |
| 944 | return; |
| 945 | } |
| 946 | status = map_read(map, adr); |
| 947 | } while (!map_word_andequal(map, status, OK, OK)); |
| 948 | |
| 949 | /* Suspend succeeded */ |
| 950 | oldstate = chip->state; |
| 951 | if (oldstate == FL_ERASING) { |
| 952 | if (!map_word_bitsset(map, status, CMD(0x40))) |
| 953 | break; |
| 954 | newstate = FL_XIP_WHILE_ERASING; |
| 955 | chip->erase_suspended = 1; |
| 956 | } else { |
| 957 | if (!map_word_bitsset(map, status, CMD(0x04))) |
| 958 | break; |
| 959 | newstate = FL_XIP_WHILE_WRITING; |
| 960 | chip->write_suspended = 1; |
| 961 | } |
| 962 | chip->state = newstate; |
| 963 | map_write(map, CMD(0xff), adr); |
| 964 | (void) map_read(map, adr); |
| 965 | asm volatile (".rep 8; nop; .endr"); |
| 966 | local_irq_enable(); |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 967 | spin_unlock(chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | asm volatile (".rep 8; nop; .endr"); |
| 969 | cond_resched(); |
| 970 | |
| 971 | /* |
| 972 | * We're back. However someone else might have |
| 973 | * decided to go write to the chip if we are in |
| 974 | * a suspended erase state. If so let's wait |
| 975 | * until it's done. |
| 976 | */ |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 977 | spin_lock(chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | while (chip->state != newstate) { |
| 979 | DECLARE_WAITQUEUE(wait, current); |
| 980 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 981 | add_wait_queue(&chip->wq, &wait); |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 982 | spin_unlock(chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | schedule(); |
| 984 | remove_wait_queue(&chip->wq, &wait); |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 985 | spin_lock(chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | } |
| 987 | /* Disallow XIP again */ |
| 988 | local_irq_disable(); |
| 989 | |
| 990 | /* Resume the write or erase operation */ |
| 991 | map_write(map, CMD(0xd0), adr); |
| 992 | map_write(map, CMD(0x70), adr); |
| 993 | chip->state = oldstate; |
| 994 | start = xip_currtime(); |
| 995 | } else if (usec >= 1000000/HZ) { |
| 996 | /* |
| 997 | * Try to save on CPU power when waiting delay |
| 998 | * is at least a system timer tick period. |
| 999 | * No need to be extremely accurate here. |
| 1000 | */ |
| 1001 | xip_cpu_idle(); |
| 1002 | } |
| 1003 | status = map_read(map, adr); |
| 1004 | } while (!map_word_andequal(map, status, OK, OK) |
| 1005 | && xip_elapsed_since(start) < usec); |
| 1006 | } |
| 1007 | |
| 1008 | #define UDELAY(map, chip, adr, usec) xip_udelay(map, chip, adr, usec) |
| 1009 | |
| 1010 | /* |
| 1011 | * The INVALIDATE_CACHED_RANGE() macro is normally used in parallel while |
| 1012 | * the flash is actively programming or erasing since we have to poll for |
| 1013 | * the operation to complete anyway. We can't do that in a generic way with |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 1014 | * a XIP setup so do it before the actual flash operation in this case |
| 1015 | * and stub it out from INVALIDATE_CACHE_UDELAY. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | */ |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 1017 | #define XIP_INVAL_CACHED_RANGE(map, from, size) \ |
| 1018 | INVALIDATE_CACHED_RANGE(map, from, size) |
| 1019 | |
| 1020 | #define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \ |
| 1021 | UDELAY(map, chip, adr, usec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | |
| 1023 | /* |
| 1024 | * Extra notes: |
| 1025 | * |
| 1026 | * Activating this XIP support changes the way the code works a bit. For |
| 1027 | * example the code to suspend the current process when concurrent access |
| 1028 | * happens is never executed because xip_udelay() will always return with the |
| 1029 | * same chip state as it was entered with. This is why there is no care for |
| 1030 | * the presence of add_wait_queue() or schedule() calls from within a couple |
| 1031 | * xip_disable()'d areas of code, like in do_erase_oneblock for example. |
| 1032 | * The queueing and scheduling are always happening within xip_udelay(). |
| 1033 | * |
| 1034 | * Similarly, get_chip() and put_chip() just happen to always be executed |
| 1035 | * with chip->state set to FL_READY (or FL_XIP_WHILE_*) where flash state |
| 1036 | * is in array mode, therefore never executing many cases therein and not |
| 1037 | * causing any problem with XIP. |
| 1038 | */ |
| 1039 | |
| 1040 | #else |
| 1041 | |
| 1042 | #define xip_disable(map, chip, adr) |
| 1043 | #define xip_enable(map, chip, adr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | #define XIP_INVAL_CACHED_RANGE(x...) |
| 1045 | |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 1046 | #define UDELAY(map, chip, adr, usec) \ |
| 1047 | do { \ |
| 1048 | spin_unlock(chip->mutex); \ |
| 1049 | cfi_udelay(usec); \ |
| 1050 | spin_lock(chip->mutex); \ |
| 1051 | } while (0) |
| 1052 | |
| 1053 | #define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \ |
| 1054 | do { \ |
| 1055 | spin_unlock(chip->mutex); \ |
| 1056 | INVALIDATE_CACHED_RANGE(map, adr, len); \ |
| 1057 | cfi_udelay(usec); \ |
| 1058 | spin_lock(chip->mutex); \ |
| 1059 | } while (0) |
| 1060 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | #endif |
| 1062 | |
| 1063 | static int do_point_onechip (struct map_info *map, struct flchip *chip, loff_t adr, size_t len) |
| 1064 | { |
| 1065 | unsigned long cmd_addr; |
| 1066 | struct cfi_private *cfi = map->fldrv_priv; |
| 1067 | int ret = 0; |
| 1068 | |
| 1069 | adr += chip->start; |
| 1070 | |
| 1071 | /* Ensure cmd read/writes are aligned. */ |
| 1072 | cmd_addr = adr & ~(map_bankwidth(map)-1); |
| 1073 | |
| 1074 | spin_lock(chip->mutex); |
| 1075 | |
| 1076 | ret = get_chip(map, chip, cmd_addr, FL_POINT); |
| 1077 | |
| 1078 | if (!ret) { |
| 1079 | if (chip->state != FL_POINT && chip->state != FL_READY) |
| 1080 | map_write(map, CMD(0xff), cmd_addr); |
| 1081 | |
| 1082 | chip->state = FL_POINT; |
| 1083 | chip->ref_point_counter++; |
| 1084 | } |
| 1085 | spin_unlock(chip->mutex); |
| 1086 | |
| 1087 | return ret; |
| 1088 | } |
| 1089 | |
| 1090 | static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf) |
| 1091 | { |
| 1092 | struct map_info *map = mtd->priv; |
| 1093 | struct cfi_private *cfi = map->fldrv_priv; |
| 1094 | unsigned long ofs; |
| 1095 | int chipnum; |
| 1096 | int ret = 0; |
| 1097 | |
| 1098 | if (!map->virt || (from + len > mtd->size)) |
| 1099 | return -EINVAL; |
| 1100 | |
| 1101 | *mtdbuf = (void *)map->virt + from; |
| 1102 | *retlen = 0; |
| 1103 | |
| 1104 | /* Now lock the chip(s) to POINT state */ |
| 1105 | |
| 1106 | /* ofs: offset within the first chip that the first read should start */ |
| 1107 | chipnum = (from >> cfi->chipshift); |
| 1108 | ofs = from - (chipnum << cfi->chipshift); |
| 1109 | |
| 1110 | while (len) { |
| 1111 | unsigned long thislen; |
| 1112 | |
| 1113 | if (chipnum >= cfi->numchips) |
| 1114 | break; |
| 1115 | |
| 1116 | if ((len + ofs -1) >> cfi->chipshift) |
| 1117 | thislen = (1<<cfi->chipshift) - ofs; |
| 1118 | else |
| 1119 | thislen = len; |
| 1120 | |
| 1121 | ret = do_point_onechip(map, &cfi->chips[chipnum], ofs, thislen); |
| 1122 | if (ret) |
| 1123 | break; |
| 1124 | |
| 1125 | *retlen += thislen; |
| 1126 | len -= thislen; |
| 1127 | |
| 1128 | ofs = 0; |
| 1129 | chipnum++; |
| 1130 | } |
| 1131 | return 0; |
| 1132 | } |
| 1133 | |
| 1134 | static void cfi_intelext_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, size_t len) |
| 1135 | { |
| 1136 | struct map_info *map = mtd->priv; |
| 1137 | struct cfi_private *cfi = map->fldrv_priv; |
| 1138 | unsigned long ofs; |
| 1139 | int chipnum; |
| 1140 | |
| 1141 | /* Now unlock the chip(s) POINT state */ |
| 1142 | |
| 1143 | /* ofs: offset within the first chip that the first read should start */ |
| 1144 | chipnum = (from >> cfi->chipshift); |
| 1145 | ofs = from - (chipnum << cfi->chipshift); |
| 1146 | |
| 1147 | while (len) { |
| 1148 | unsigned long thislen; |
| 1149 | struct flchip *chip; |
| 1150 | |
| 1151 | chip = &cfi->chips[chipnum]; |
| 1152 | if (chipnum >= cfi->numchips) |
| 1153 | break; |
| 1154 | |
| 1155 | if ((len + ofs -1) >> cfi->chipshift) |
| 1156 | thislen = (1<<cfi->chipshift) - ofs; |
| 1157 | else |
| 1158 | thislen = len; |
| 1159 | |
| 1160 | spin_lock(chip->mutex); |
| 1161 | if (chip->state == FL_POINT) { |
| 1162 | chip->ref_point_counter--; |
| 1163 | if(chip->ref_point_counter == 0) |
| 1164 | chip->state = FL_READY; |
| 1165 | } else |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1166 | printk(KERN_ERR "%s: Warning: unpoint called on non pointed region\n", map->name); /* Should this give an error? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | |
| 1168 | put_chip(map, chip, chip->start); |
| 1169 | spin_unlock(chip->mutex); |
| 1170 | |
| 1171 | len -= thislen; |
| 1172 | ofs = 0; |
| 1173 | chipnum++; |
| 1174 | } |
| 1175 | } |
| 1176 | |
| 1177 | static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) |
| 1178 | { |
| 1179 | unsigned long cmd_addr; |
| 1180 | struct cfi_private *cfi = map->fldrv_priv; |
| 1181 | int ret; |
| 1182 | |
| 1183 | adr += chip->start; |
| 1184 | |
| 1185 | /* Ensure cmd read/writes are aligned. */ |
| 1186 | cmd_addr = adr & ~(map_bankwidth(map)-1); |
| 1187 | |
| 1188 | spin_lock(chip->mutex); |
| 1189 | ret = get_chip(map, chip, cmd_addr, FL_READY); |
| 1190 | if (ret) { |
| 1191 | spin_unlock(chip->mutex); |
| 1192 | return ret; |
| 1193 | } |
| 1194 | |
| 1195 | if (chip->state != FL_POINT && chip->state != FL_READY) { |
| 1196 | map_write(map, CMD(0xff), cmd_addr); |
| 1197 | |
| 1198 | chip->state = FL_READY; |
| 1199 | } |
| 1200 | |
| 1201 | map_copy_from(map, buf, adr, len); |
| 1202 | |
| 1203 | put_chip(map, chip, cmd_addr); |
| 1204 | |
| 1205 | spin_unlock(chip->mutex); |
| 1206 | return 0; |
| 1207 | } |
| 1208 | |
| 1209 | static int cfi_intelext_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) |
| 1210 | { |
| 1211 | struct map_info *map = mtd->priv; |
| 1212 | struct cfi_private *cfi = map->fldrv_priv; |
| 1213 | unsigned long ofs; |
| 1214 | int chipnum; |
| 1215 | int ret = 0; |
| 1216 | |
| 1217 | /* ofs: offset within the first chip that the first read should start */ |
| 1218 | chipnum = (from >> cfi->chipshift); |
| 1219 | ofs = from - (chipnum << cfi->chipshift); |
| 1220 | |
| 1221 | *retlen = 0; |
| 1222 | |
| 1223 | while (len) { |
| 1224 | unsigned long thislen; |
| 1225 | |
| 1226 | if (chipnum >= cfi->numchips) |
| 1227 | break; |
| 1228 | |
| 1229 | if ((len + ofs -1) >> cfi->chipshift) |
| 1230 | thislen = (1<<cfi->chipshift) - ofs; |
| 1231 | else |
| 1232 | thislen = len; |
| 1233 | |
| 1234 | ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); |
| 1235 | if (ret) |
| 1236 | break; |
| 1237 | |
| 1238 | *retlen += thislen; |
| 1239 | len -= thislen; |
| 1240 | buf += thislen; |
| 1241 | |
| 1242 | ofs = 0; |
| 1243 | chipnum++; |
| 1244 | } |
| 1245 | return ret; |
| 1246 | } |
| 1247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1249 | unsigned long adr, map_word datum, int mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | { |
| 1251 | struct cfi_private *cfi = map->fldrv_priv; |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1252 | map_word status, status_OK, write_cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | unsigned long timeo; |
| 1254 | int z, ret=0; |
| 1255 | |
| 1256 | adr += chip->start; |
| 1257 | |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 1258 | /* Let's determine those according to the interleave only once */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | status_OK = CMD(0x80); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1260 | switch (mode) { |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 1261 | case FL_WRITING: |
| 1262 | write_cmd = (cfi->cfiq->P_ID != 0x0200) ? CMD(0x40) : CMD(0x41); |
| 1263 | break; |
| 1264 | case FL_OTP_WRITE: |
| 1265 | write_cmd = CMD(0xc0); |
| 1266 | break; |
| 1267 | default: |
| 1268 | return -EINVAL; |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1269 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | |
| 1271 | spin_lock(chip->mutex); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1272 | ret = get_chip(map, chip, adr, mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | if (ret) { |
| 1274 | spin_unlock(chip->mutex); |
| 1275 | return ret; |
| 1276 | } |
| 1277 | |
| 1278 | XIP_INVAL_CACHED_RANGE(map, adr, map_bankwidth(map)); |
| 1279 | ENABLE_VPP(map); |
| 1280 | xip_disable(map, chip, adr); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1281 | map_write(map, write_cmd, adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | map_write(map, datum, adr); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1283 | chip->state = mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 1285 | INVALIDATE_CACHE_UDELAY(map, chip, |
| 1286 | adr, map_bankwidth(map), |
| 1287 | chip->word_write_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | |
| 1289 | timeo = jiffies + (HZ/2); |
| 1290 | z = 0; |
| 1291 | for (;;) { |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1292 | if (chip->state != mode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | /* Someone's suspended the write. Sleep */ |
| 1294 | DECLARE_WAITQUEUE(wait, current); |
| 1295 | |
| 1296 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1297 | add_wait_queue(&chip->wq, &wait); |
| 1298 | spin_unlock(chip->mutex); |
| 1299 | schedule(); |
| 1300 | remove_wait_queue(&chip->wq, &wait); |
| 1301 | timeo = jiffies + (HZ / 2); /* FIXME */ |
| 1302 | spin_lock(chip->mutex); |
| 1303 | continue; |
| 1304 | } |
| 1305 | |
| 1306 | status = map_read(map, adr); |
| 1307 | if (map_word_andequal(map, status, status_OK, status_OK)) |
| 1308 | break; |
| 1309 | |
| 1310 | /* OK Still waiting */ |
| 1311 | if (time_after(jiffies, timeo)) { |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1312 | map_write(map, CMD(0x70), adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | chip->state = FL_STATUS; |
| 1314 | xip_enable(map, chip, adr); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1315 | printk(KERN_ERR "%s: word write error (status timeout)\n", map->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | ret = -EIO; |
| 1317 | goto out; |
| 1318 | } |
| 1319 | |
| 1320 | /* Latency issues. Drop the lock, wait a while and retry */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | z++; |
| 1322 | UDELAY(map, chip, adr, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | } |
| 1324 | if (!z) { |
| 1325 | chip->word_write_time--; |
| 1326 | if (!chip->word_write_time) |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1327 | chip->word_write_time = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | } |
| 1329 | if (z > 1) |
| 1330 | chip->word_write_time++; |
| 1331 | |
| 1332 | /* Done and happy. */ |
| 1333 | chip->state = FL_STATUS; |
| 1334 | |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1335 | /* check for errors */ |
| 1336 | if (map_word_bitsset(map, status, CMD(0x1a))) { |
| 1337 | unsigned long chipstatus = MERGESTATUS(status); |
| 1338 | |
| 1339 | /* reset status */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | map_write(map, CMD(0x50), adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | map_write(map, CMD(0x70), adr); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1342 | xip_enable(map, chip, adr); |
| 1343 | |
| 1344 | if (chipstatus & 0x02) { |
| 1345 | ret = -EROFS; |
| 1346 | } else if (chipstatus & 0x08) { |
| 1347 | printk(KERN_ERR "%s: word write error (bad VPP)\n", map->name); |
| 1348 | ret = -EIO; |
| 1349 | } else { |
| 1350 | printk(KERN_ERR "%s: word write error (status 0x%lx)\n", map->name, chipstatus); |
| 1351 | ret = -EINVAL; |
| 1352 | } |
| 1353 | |
| 1354 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | } |
| 1356 | |
| 1357 | xip_enable(map, chip, adr); |
| 1358 | out: put_chip(map, chip, adr); |
| 1359 | spin_unlock(chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | return ret; |
| 1361 | } |
| 1362 | |
| 1363 | |
| 1364 | static int cfi_intelext_write_words (struct mtd_info *mtd, loff_t to , size_t len, size_t *retlen, const u_char *buf) |
| 1365 | { |
| 1366 | struct map_info *map = mtd->priv; |
| 1367 | struct cfi_private *cfi = map->fldrv_priv; |
| 1368 | int ret = 0; |
| 1369 | int chipnum; |
| 1370 | unsigned long ofs; |
| 1371 | |
| 1372 | *retlen = 0; |
| 1373 | if (!len) |
| 1374 | return 0; |
| 1375 | |
| 1376 | chipnum = to >> cfi->chipshift; |
| 1377 | ofs = to - (chipnum << cfi->chipshift); |
| 1378 | |
| 1379 | /* If it's not bus-aligned, do the first byte write */ |
| 1380 | if (ofs & (map_bankwidth(map)-1)) { |
| 1381 | unsigned long bus_ofs = ofs & ~(map_bankwidth(map)-1); |
| 1382 | int gap = ofs - bus_ofs; |
| 1383 | int n; |
| 1384 | map_word datum; |
| 1385 | |
| 1386 | n = min_t(int, len, map_bankwidth(map)-gap); |
| 1387 | datum = map_word_ff(map); |
| 1388 | datum = map_word_load_partial(map, datum, buf, gap, n); |
| 1389 | |
| 1390 | ret = do_write_oneword(map, &cfi->chips[chipnum], |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1391 | bus_ofs, datum, FL_WRITING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | if (ret) |
| 1393 | return ret; |
| 1394 | |
| 1395 | len -= n; |
| 1396 | ofs += n; |
| 1397 | buf += n; |
| 1398 | (*retlen) += n; |
| 1399 | |
| 1400 | if (ofs >> cfi->chipshift) { |
| 1401 | chipnum ++; |
| 1402 | ofs = 0; |
| 1403 | if (chipnum == cfi->numchips) |
| 1404 | return 0; |
| 1405 | } |
| 1406 | } |
| 1407 | |
| 1408 | while(len >= map_bankwidth(map)) { |
| 1409 | map_word datum = map_word_load(map, buf); |
| 1410 | |
| 1411 | ret = do_write_oneword(map, &cfi->chips[chipnum], |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1412 | ofs, datum, FL_WRITING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | if (ret) |
| 1414 | return ret; |
| 1415 | |
| 1416 | ofs += map_bankwidth(map); |
| 1417 | buf += map_bankwidth(map); |
| 1418 | (*retlen) += map_bankwidth(map); |
| 1419 | len -= map_bankwidth(map); |
| 1420 | |
| 1421 | if (ofs >> cfi->chipshift) { |
| 1422 | chipnum ++; |
| 1423 | ofs = 0; |
| 1424 | if (chipnum == cfi->numchips) |
| 1425 | return 0; |
| 1426 | } |
| 1427 | } |
| 1428 | |
| 1429 | if (len & (map_bankwidth(map)-1)) { |
| 1430 | map_word datum; |
| 1431 | |
| 1432 | datum = map_word_ff(map); |
| 1433 | datum = map_word_load_partial(map, datum, buf, 0, len); |
| 1434 | |
| 1435 | ret = do_write_oneword(map, &cfi->chips[chipnum], |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1436 | ofs, datum, FL_WRITING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | if (ret) |
| 1438 | return ret; |
| 1439 | |
| 1440 | (*retlen) += len; |
| 1441 | } |
| 1442 | |
| 1443 | return 0; |
| 1444 | } |
| 1445 | |
| 1446 | |
| 1447 | static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, |
| 1448 | unsigned long adr, const u_char *buf, int len) |
| 1449 | { |
| 1450 | struct cfi_private *cfi = map->fldrv_priv; |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 1451 | map_word status, status_OK, write_cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | unsigned long cmd_adr, timeo; |
| 1453 | int wbufsize, z, ret=0, bytes, words; |
| 1454 | |
| 1455 | wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; |
| 1456 | adr += chip->start; |
| 1457 | cmd_adr = adr & ~(wbufsize-1); |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 1458 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | /* Let's determine this according to the interleave only once */ |
| 1460 | status_OK = CMD(0x80); |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 1461 | write_cmd = (cfi->cfiq->P_ID != 0x0200) ? CMD(0xe8) : CMD(0xe9); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1462 | |
| 1463 | spin_lock(chip->mutex); |
| 1464 | ret = get_chip(map, chip, cmd_adr, FL_WRITING); |
| 1465 | if (ret) { |
| 1466 | spin_unlock(chip->mutex); |
| 1467 | return ret; |
| 1468 | } |
| 1469 | |
| 1470 | XIP_INVAL_CACHED_RANGE(map, adr, len); |
| 1471 | ENABLE_VPP(map); |
| 1472 | xip_disable(map, chip, cmd_adr); |
| 1473 | |
| 1474 | /* §4.8 of the 28FxxxJ3A datasheet says "Any time SR.4 and/or SR.5 is set |
| 1475 | [...], the device will not accept any more Write to Buffer commands". |
| 1476 | So we must check here and reset those bits if they're set. Otherwise |
| 1477 | we're just pissing in the wind */ |
| 1478 | if (chip->state != FL_STATUS) |
| 1479 | map_write(map, CMD(0x70), cmd_adr); |
| 1480 | status = map_read(map, cmd_adr); |
| 1481 | if (map_word_bitsset(map, status, CMD(0x30))) { |
| 1482 | xip_enable(map, chip, cmd_adr); |
| 1483 | printk(KERN_WARNING "SR.4 or SR.5 bits set in buffer write (status %lx). Clearing.\n", status.x[0]); |
| 1484 | xip_disable(map, chip, cmd_adr); |
| 1485 | map_write(map, CMD(0x50), cmd_adr); |
| 1486 | map_write(map, CMD(0x70), cmd_adr); |
| 1487 | } |
| 1488 | |
| 1489 | chip->state = FL_WRITING_TO_BUFFER; |
| 1490 | |
| 1491 | z = 0; |
| 1492 | for (;;) { |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 1493 | map_write(map, write_cmd, cmd_adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1494 | |
| 1495 | status = map_read(map, cmd_adr); |
| 1496 | if (map_word_andequal(map, status, status_OK, status_OK)) |
| 1497 | break; |
| 1498 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | UDELAY(map, chip, cmd_adr, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | |
| 1501 | if (++z > 20) { |
| 1502 | /* Argh. Not ready for write to buffer */ |
| 1503 | map_word Xstatus; |
| 1504 | map_write(map, CMD(0x70), cmd_adr); |
| 1505 | chip->state = FL_STATUS; |
| 1506 | Xstatus = map_read(map, cmd_adr); |
| 1507 | /* Odd. Clear status bits */ |
| 1508 | map_write(map, CMD(0x50), cmd_adr); |
| 1509 | map_write(map, CMD(0x70), cmd_adr); |
| 1510 | xip_enable(map, chip, cmd_adr); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1511 | printk(KERN_ERR "%s: Chip not ready for buffer write. status = %lx, Xstatus = %lx\n", |
| 1512 | map->name, status.x[0], Xstatus.x[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1513 | ret = -EIO; |
| 1514 | goto out; |
| 1515 | } |
| 1516 | } |
| 1517 | |
| 1518 | /* Write length of data to come */ |
| 1519 | bytes = len & (map_bankwidth(map)-1); |
| 1520 | words = len / map_bankwidth(map); |
| 1521 | map_write(map, CMD(words - !bytes), cmd_adr ); |
| 1522 | |
| 1523 | /* Write data */ |
| 1524 | z = 0; |
| 1525 | while(z < words * map_bankwidth(map)) { |
| 1526 | map_word datum = map_word_load(map, buf); |
| 1527 | map_write(map, datum, adr+z); |
| 1528 | |
| 1529 | z += map_bankwidth(map); |
| 1530 | buf += map_bankwidth(map); |
| 1531 | } |
| 1532 | |
| 1533 | if (bytes) { |
| 1534 | map_word datum; |
| 1535 | |
| 1536 | datum = map_word_ff(map); |
| 1537 | datum = map_word_load_partial(map, datum, buf, 0, bytes); |
| 1538 | map_write(map, datum, adr+z); |
| 1539 | } |
| 1540 | |
| 1541 | /* GO GO GO */ |
| 1542 | map_write(map, CMD(0xd0), cmd_adr); |
| 1543 | chip->state = FL_WRITING; |
| 1544 | |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 1545 | INVALIDATE_CACHE_UDELAY(map, chip, |
| 1546 | cmd_adr, len, |
| 1547 | chip->buffer_write_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1548 | |
| 1549 | timeo = jiffies + (HZ/2); |
| 1550 | z = 0; |
| 1551 | for (;;) { |
| 1552 | if (chip->state != FL_WRITING) { |
| 1553 | /* Someone's suspended the write. Sleep */ |
| 1554 | DECLARE_WAITQUEUE(wait, current); |
| 1555 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1556 | add_wait_queue(&chip->wq, &wait); |
| 1557 | spin_unlock(chip->mutex); |
| 1558 | schedule(); |
| 1559 | remove_wait_queue(&chip->wq, &wait); |
| 1560 | timeo = jiffies + (HZ / 2); /* FIXME */ |
| 1561 | spin_lock(chip->mutex); |
| 1562 | continue; |
| 1563 | } |
| 1564 | |
| 1565 | status = map_read(map, cmd_adr); |
| 1566 | if (map_word_andequal(map, status, status_OK, status_OK)) |
| 1567 | break; |
| 1568 | |
| 1569 | /* OK Still waiting */ |
| 1570 | if (time_after(jiffies, timeo)) { |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1571 | map_write(map, CMD(0x70), cmd_adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | chip->state = FL_STATUS; |
| 1573 | xip_enable(map, chip, cmd_adr); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1574 | printk(KERN_ERR "%s: buffer write error (status timeout)\n", map->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | ret = -EIO; |
| 1576 | goto out; |
| 1577 | } |
| 1578 | |
| 1579 | /* Latency issues. Drop the lock, wait a while and retry */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | z++; |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 1581 | UDELAY(map, chip, cmd_adr, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | } |
| 1583 | if (!z) { |
| 1584 | chip->buffer_write_time--; |
| 1585 | if (!chip->buffer_write_time) |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1586 | chip->buffer_write_time = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | } |
| 1588 | if (z > 1) |
| 1589 | chip->buffer_write_time++; |
| 1590 | |
| 1591 | /* Done and happy. */ |
| 1592 | chip->state = FL_STATUS; |
| 1593 | |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1594 | /* check for errors */ |
| 1595 | if (map_word_bitsset(map, status, CMD(0x1a))) { |
| 1596 | unsigned long chipstatus = MERGESTATUS(status); |
| 1597 | |
| 1598 | /* reset status */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | map_write(map, CMD(0x50), cmd_adr); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1600 | map_write(map, CMD(0x70), cmd_adr); |
| 1601 | xip_enable(map, chip, cmd_adr); |
| 1602 | |
| 1603 | if (chipstatus & 0x02) { |
| 1604 | ret = -EROFS; |
| 1605 | } else if (chipstatus & 0x08) { |
| 1606 | printk(KERN_ERR "%s: buffer write error (bad VPP)\n", map->name); |
| 1607 | ret = -EIO; |
| 1608 | } else { |
| 1609 | printk(KERN_ERR "%s: buffer write error (status 0x%lx)\n", map->name, chipstatus); |
| 1610 | ret = -EINVAL; |
| 1611 | } |
| 1612 | |
| 1613 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | } |
| 1615 | |
| 1616 | xip_enable(map, chip, cmd_adr); |
| 1617 | out: put_chip(map, chip, cmd_adr); |
| 1618 | spin_unlock(chip->mutex); |
| 1619 | return ret; |
| 1620 | } |
| 1621 | |
| 1622 | static int cfi_intelext_write_buffers (struct mtd_info *mtd, loff_t to, |
| 1623 | size_t len, size_t *retlen, const u_char *buf) |
| 1624 | { |
| 1625 | struct map_info *map = mtd->priv; |
| 1626 | struct cfi_private *cfi = map->fldrv_priv; |
| 1627 | int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; |
| 1628 | int ret = 0; |
| 1629 | int chipnum; |
| 1630 | unsigned long ofs; |
| 1631 | |
| 1632 | *retlen = 0; |
| 1633 | if (!len) |
| 1634 | return 0; |
| 1635 | |
| 1636 | chipnum = to >> cfi->chipshift; |
| 1637 | ofs = to - (chipnum << cfi->chipshift); |
| 1638 | |
| 1639 | /* If it's not bus-aligned, do the first word write */ |
| 1640 | if (ofs & (map_bankwidth(map)-1)) { |
| 1641 | size_t local_len = (-ofs)&(map_bankwidth(map)-1); |
| 1642 | if (local_len > len) |
| 1643 | local_len = len; |
| 1644 | ret = cfi_intelext_write_words(mtd, to, local_len, |
| 1645 | retlen, buf); |
| 1646 | if (ret) |
| 1647 | return ret; |
| 1648 | ofs += local_len; |
| 1649 | buf += local_len; |
| 1650 | len -= local_len; |
| 1651 | |
| 1652 | if (ofs >> cfi->chipshift) { |
| 1653 | chipnum ++; |
| 1654 | ofs = 0; |
| 1655 | if (chipnum == cfi->numchips) |
| 1656 | return 0; |
| 1657 | } |
| 1658 | } |
| 1659 | |
| 1660 | while(len) { |
| 1661 | /* We must not cross write block boundaries */ |
| 1662 | int size = wbufsize - (ofs & (wbufsize-1)); |
| 1663 | |
| 1664 | if (size > len) |
| 1665 | size = len; |
| 1666 | ret = do_write_buffer(map, &cfi->chips[chipnum], |
| 1667 | ofs, buf, size); |
| 1668 | if (ret) |
| 1669 | return ret; |
| 1670 | |
| 1671 | ofs += size; |
| 1672 | buf += size; |
| 1673 | (*retlen) += size; |
| 1674 | len -= size; |
| 1675 | |
| 1676 | if (ofs >> cfi->chipshift) { |
| 1677 | chipnum ++; |
| 1678 | ofs = 0; |
| 1679 | if (chipnum == cfi->numchips) |
| 1680 | return 0; |
| 1681 | } |
| 1682 | } |
| 1683 | return 0; |
| 1684 | } |
| 1685 | |
| 1686 | static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, |
| 1687 | unsigned long adr, int len, void *thunk) |
| 1688 | { |
| 1689 | struct cfi_private *cfi = map->fldrv_priv; |
| 1690 | map_word status, status_OK; |
| 1691 | unsigned long timeo; |
| 1692 | int retries = 3; |
| 1693 | DECLARE_WAITQUEUE(wait, current); |
| 1694 | int ret = 0; |
| 1695 | |
| 1696 | adr += chip->start; |
| 1697 | |
| 1698 | /* Let's determine this according to the interleave only once */ |
| 1699 | status_OK = CMD(0x80); |
| 1700 | |
| 1701 | retry: |
| 1702 | spin_lock(chip->mutex); |
| 1703 | ret = get_chip(map, chip, adr, FL_ERASING); |
| 1704 | if (ret) { |
| 1705 | spin_unlock(chip->mutex); |
| 1706 | return ret; |
| 1707 | } |
| 1708 | |
| 1709 | XIP_INVAL_CACHED_RANGE(map, adr, len); |
| 1710 | ENABLE_VPP(map); |
| 1711 | xip_disable(map, chip, adr); |
| 1712 | |
| 1713 | /* Clear the status register first */ |
| 1714 | map_write(map, CMD(0x50), adr); |
| 1715 | |
| 1716 | /* Now erase */ |
| 1717 | map_write(map, CMD(0x20), adr); |
| 1718 | map_write(map, CMD(0xD0), adr); |
| 1719 | chip->state = FL_ERASING; |
| 1720 | chip->erase_suspended = 0; |
| 1721 | |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 1722 | INVALIDATE_CACHE_UDELAY(map, chip, |
| 1723 | adr, len, |
| 1724 | chip->erase_time*1000/2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | |
| 1726 | /* FIXME. Use a timer to check this, and return immediately. */ |
| 1727 | /* Once the state machine's known to be working I'll do that */ |
| 1728 | |
| 1729 | timeo = jiffies + (HZ*20); |
| 1730 | for (;;) { |
| 1731 | if (chip->state != FL_ERASING) { |
| 1732 | /* Someone's suspended the erase. Sleep */ |
| 1733 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1734 | add_wait_queue(&chip->wq, &wait); |
| 1735 | spin_unlock(chip->mutex); |
| 1736 | schedule(); |
| 1737 | remove_wait_queue(&chip->wq, &wait); |
| 1738 | spin_lock(chip->mutex); |
| 1739 | continue; |
| 1740 | } |
| 1741 | if (chip->erase_suspended) { |
| 1742 | /* This erase was suspended and resumed. |
| 1743 | Adjust the timeout */ |
| 1744 | timeo = jiffies + (HZ*20); /* FIXME */ |
| 1745 | chip->erase_suspended = 0; |
| 1746 | } |
| 1747 | |
| 1748 | status = map_read(map, adr); |
| 1749 | if (map_word_andequal(map, status, status_OK, status_OK)) |
| 1750 | break; |
| 1751 | |
| 1752 | /* OK Still waiting */ |
| 1753 | if (time_after(jiffies, timeo)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1754 | map_write(map, CMD(0x70), adr); |
| 1755 | chip->state = FL_STATUS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1756 | xip_enable(map, chip, adr); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1757 | printk(KERN_ERR "%s: block erase error: (status timeout)\n", map->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1758 | ret = -EIO; |
| 1759 | goto out; |
| 1760 | } |
| 1761 | |
| 1762 | /* Latency issues. Drop the lock, wait a while and retry */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | UDELAY(map, chip, adr, 1000000/HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1764 | } |
| 1765 | |
| 1766 | /* We've broken this before. It doesn't hurt to be safe */ |
| 1767 | map_write(map, CMD(0x70), adr); |
| 1768 | chip->state = FL_STATUS; |
| 1769 | status = map_read(map, adr); |
| 1770 | |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1771 | /* check for errors */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | if (map_word_bitsset(map, status, CMD(0x3a))) { |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1773 | unsigned long chipstatus = MERGESTATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1774 | |
| 1775 | /* Reset the error bits */ |
| 1776 | map_write(map, CMD(0x50), adr); |
| 1777 | map_write(map, CMD(0x70), adr); |
| 1778 | xip_enable(map, chip, adr); |
| 1779 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1780 | if ((chipstatus & 0x30) == 0x30) { |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1781 | printk(KERN_ERR "%s: block erase error: (bad command sequence, status 0x%lx)\n", map->name, chipstatus); |
| 1782 | ret = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1783 | } else if (chipstatus & 0x02) { |
| 1784 | /* Protection bit set */ |
| 1785 | ret = -EROFS; |
| 1786 | } else if (chipstatus & 0x8) { |
| 1787 | /* Voltage */ |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1788 | printk(KERN_ERR "%s: block erase error: (bad VPP)\n", map->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | ret = -EIO; |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1790 | } else if (chipstatus & 0x20 && retries--) { |
| 1791 | printk(KERN_DEBUG "block erase failed at 0x%08lx: status 0x%lx. Retrying...\n", adr, chipstatus); |
| 1792 | timeo = jiffies + HZ; |
| 1793 | put_chip(map, chip, adr); |
| 1794 | spin_unlock(chip->mutex); |
| 1795 | goto retry; |
| 1796 | } else { |
| 1797 | printk(KERN_ERR "%s: block erase failed at 0x%08lx (status 0x%lx)\n", map->name, adr, chipstatus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | ret = -EIO; |
| 1799 | } |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1800 | |
| 1801 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | } |
| 1803 | |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1804 | xip_enable(map, chip, adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1805 | out: put_chip(map, chip, adr); |
| 1806 | spin_unlock(chip->mutex); |
| 1807 | return ret; |
| 1808 | } |
| 1809 | |
| 1810 | int cfi_intelext_erase_varsize(struct mtd_info *mtd, struct erase_info *instr) |
| 1811 | { |
| 1812 | unsigned long ofs, len; |
| 1813 | int ret; |
| 1814 | |
| 1815 | ofs = instr->addr; |
| 1816 | len = instr->len; |
| 1817 | |
| 1818 | ret = cfi_varsize_frob(mtd, do_erase_oneblock, ofs, len, NULL); |
| 1819 | if (ret) |
| 1820 | return ret; |
| 1821 | |
| 1822 | instr->state = MTD_ERASE_DONE; |
| 1823 | mtd_erase_callback(instr); |
| 1824 | |
| 1825 | return 0; |
| 1826 | } |
| 1827 | |
| 1828 | static void cfi_intelext_sync (struct mtd_info *mtd) |
| 1829 | { |
| 1830 | struct map_info *map = mtd->priv; |
| 1831 | struct cfi_private *cfi = map->fldrv_priv; |
| 1832 | int i; |
| 1833 | struct flchip *chip; |
| 1834 | int ret = 0; |
| 1835 | |
| 1836 | for (i=0; !ret && i<cfi->numchips; i++) { |
| 1837 | chip = &cfi->chips[i]; |
| 1838 | |
| 1839 | spin_lock(chip->mutex); |
| 1840 | ret = get_chip(map, chip, chip->start, FL_SYNCING); |
| 1841 | |
| 1842 | if (!ret) { |
| 1843 | chip->oldstate = chip->state; |
| 1844 | chip->state = FL_SYNCING; |
| 1845 | /* No need to wake_up() on this state change - |
| 1846 | * as the whole point is that nobody can do anything |
| 1847 | * with the chip now anyway. |
| 1848 | */ |
| 1849 | } |
| 1850 | spin_unlock(chip->mutex); |
| 1851 | } |
| 1852 | |
| 1853 | /* Unlock the chips again */ |
| 1854 | |
| 1855 | for (i--; i >=0; i--) { |
| 1856 | chip = &cfi->chips[i]; |
| 1857 | |
| 1858 | spin_lock(chip->mutex); |
| 1859 | |
| 1860 | if (chip->state == FL_SYNCING) { |
| 1861 | chip->state = chip->oldstate; |
Nicolas Pitre | 09c7933 | 2005-03-16 22:41:09 +0000 | [diff] [blame] | 1862 | chip->oldstate = FL_READY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | wake_up(&chip->wq); |
| 1864 | } |
| 1865 | spin_unlock(chip->mutex); |
| 1866 | } |
| 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 | { |
| 1875 | struct cfi_private *cfi = map->fldrv_priv; |
| 1876 | int status, ofs_factor = cfi->interleave * cfi->device_type; |
| 1877 | |
Todd Poynor | c25bb1f | 2005-04-27 21:01:52 +0100 | [diff] [blame] | 1878 | adr += chip->start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1879 | xip_disable(map, chip, adr+(2*ofs_factor)); |
Todd Poynor | c25bb1f | 2005-04-27 21:01:52 +0100 | [diff] [blame] | 1880 | map_write(map, CMD(0x90), adr+(2*ofs_factor)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | chip->state = FL_JEDEC_QUERY; |
| 1882 | status = cfi_read_query(map, adr+(2*ofs_factor)); |
| 1883 | xip_enable(map, chip, 0); |
| 1884 | printk(KERN_DEBUG "block status register for 0x%08lx is %x\n", |
| 1885 | adr, status); |
| 1886 | return 0; |
| 1887 | } |
| 1888 | #endif |
| 1889 | |
| 1890 | #define DO_XXLOCK_ONEBLOCK_LOCK ((void *) 1) |
| 1891 | #define DO_XXLOCK_ONEBLOCK_UNLOCK ((void *) 2) |
| 1892 | |
| 1893 | static int __xipram do_xxlock_oneblock(struct map_info *map, struct flchip *chip, |
| 1894 | unsigned long adr, int len, void *thunk) |
| 1895 | { |
| 1896 | struct cfi_private *cfi = map->fldrv_priv; |
Todd Poynor | 9a6e73e | 2005-03-29 23:06:40 +0100 | [diff] [blame] | 1897 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1898 | map_word status, status_OK; |
| 1899 | unsigned long timeo = jiffies + HZ; |
| 1900 | int ret; |
| 1901 | |
| 1902 | adr += chip->start; |
| 1903 | |
| 1904 | /* Let's determine this according to the interleave only once */ |
| 1905 | status_OK = CMD(0x80); |
| 1906 | |
| 1907 | spin_lock(chip->mutex); |
| 1908 | ret = get_chip(map, chip, adr, FL_LOCKING); |
| 1909 | if (ret) { |
| 1910 | spin_unlock(chip->mutex); |
| 1911 | return ret; |
| 1912 | } |
| 1913 | |
| 1914 | ENABLE_VPP(map); |
| 1915 | xip_disable(map, chip, adr); |
| 1916 | |
| 1917 | map_write(map, CMD(0x60), adr); |
| 1918 | if (thunk == DO_XXLOCK_ONEBLOCK_LOCK) { |
| 1919 | map_write(map, CMD(0x01), adr); |
| 1920 | chip->state = FL_LOCKING; |
| 1921 | } else if (thunk == DO_XXLOCK_ONEBLOCK_UNLOCK) { |
| 1922 | map_write(map, CMD(0xD0), adr); |
| 1923 | chip->state = FL_UNLOCKING; |
| 1924 | } else |
| 1925 | BUG(); |
| 1926 | |
Todd Poynor | 9a6e73e | 2005-03-29 23:06:40 +0100 | [diff] [blame] | 1927 | /* |
| 1928 | * If Instant Individual Block Locking supported then no need |
| 1929 | * to delay. |
| 1930 | */ |
| 1931 | |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 1932 | if (!extp || !(extp->FeatureSupport & (1 << 5))) |
Todd Poynor | 9a6e73e | 2005-03-29 23:06:40 +0100 | [diff] [blame] | 1933 | UDELAY(map, chip, adr, 1000000/HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1934 | |
| 1935 | /* FIXME. Use a timer to check this, and return immediately. */ |
| 1936 | /* Once the state machine's known to be working I'll do that */ |
| 1937 | |
| 1938 | timeo = jiffies + (HZ*20); |
| 1939 | for (;;) { |
| 1940 | |
| 1941 | status = map_read(map, adr); |
| 1942 | if (map_word_andequal(map, status, status_OK, status_OK)) |
| 1943 | break; |
| 1944 | |
| 1945 | /* OK Still waiting */ |
| 1946 | if (time_after(jiffies, timeo)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1947 | map_write(map, CMD(0x70), adr); |
| 1948 | chip->state = FL_STATUS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1949 | xip_enable(map, chip, adr); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1950 | printk(KERN_ERR "%s: block unlock error: (status timeout)\n", map->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1951 | put_chip(map, chip, adr); |
| 1952 | spin_unlock(chip->mutex); |
| 1953 | return -EIO; |
| 1954 | } |
| 1955 | |
| 1956 | /* Latency issues. Drop the lock, wait a while and retry */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1957 | UDELAY(map, chip, adr, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1958 | } |
| 1959 | |
| 1960 | /* Done and happy. */ |
| 1961 | chip->state = FL_STATUS; |
| 1962 | xip_enable(map, chip, adr); |
| 1963 | put_chip(map, chip, adr); |
| 1964 | spin_unlock(chip->mutex); |
| 1965 | return 0; |
| 1966 | } |
| 1967 | |
| 1968 | static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, size_t len) |
| 1969 | { |
| 1970 | int ret; |
| 1971 | |
| 1972 | #ifdef DEBUG_LOCK_BITS |
| 1973 | printk(KERN_DEBUG "%s: lock status before, ofs=0x%08llx, len=0x%08X\n", |
| 1974 | __FUNCTION__, ofs, len); |
| 1975 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, |
| 1976 | ofs, len, 0); |
| 1977 | #endif |
| 1978 | |
| 1979 | ret = cfi_varsize_frob(mtd, do_xxlock_oneblock, |
| 1980 | ofs, len, DO_XXLOCK_ONEBLOCK_LOCK); |
| 1981 | |
| 1982 | #ifdef DEBUG_LOCK_BITS |
| 1983 | printk(KERN_DEBUG "%s: lock status after, ret=%d\n", |
| 1984 | __FUNCTION__, ret); |
| 1985 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, |
| 1986 | ofs, len, 0); |
| 1987 | #endif |
| 1988 | |
| 1989 | return ret; |
| 1990 | } |
| 1991 | |
| 1992 | static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, size_t len) |
| 1993 | { |
| 1994 | int ret; |
| 1995 | |
| 1996 | #ifdef DEBUG_LOCK_BITS |
| 1997 | printk(KERN_DEBUG "%s: lock status before, ofs=0x%08llx, len=0x%08X\n", |
| 1998 | __FUNCTION__, ofs, len); |
| 1999 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, |
| 2000 | ofs, len, 0); |
| 2001 | #endif |
| 2002 | |
| 2003 | ret = cfi_varsize_frob(mtd, do_xxlock_oneblock, |
| 2004 | ofs, len, DO_XXLOCK_ONEBLOCK_UNLOCK); |
| 2005 | |
| 2006 | #ifdef DEBUG_LOCK_BITS |
| 2007 | printk(KERN_DEBUG "%s: lock status after, ret=%d\n", |
| 2008 | __FUNCTION__, ret); |
| 2009 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, |
| 2010 | ofs, len, 0); |
| 2011 | #endif |
| 2012 | |
| 2013 | return ret; |
| 2014 | } |
| 2015 | |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2016 | #ifdef CONFIG_MTD_OTP |
| 2017 | |
| 2018 | typedef int (*otp_op_t)(struct map_info *map, struct flchip *chip, |
| 2019 | u_long data_offset, u_char *buf, u_int size, |
| 2020 | u_long prot_offset, u_int groupno, u_int groupsize); |
| 2021 | |
| 2022 | static int __xipram |
| 2023 | do_otp_read(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 | struct cfi_private *cfi = map->fldrv_priv; |
| 2027 | int ret; |
| 2028 | |
| 2029 | spin_lock(chip->mutex); |
| 2030 | ret = get_chip(map, chip, chip->start, FL_JEDEC_QUERY); |
| 2031 | if (ret) { |
| 2032 | spin_unlock(chip->mutex); |
| 2033 | return ret; |
| 2034 | } |
| 2035 | |
| 2036 | /* let's ensure we're not reading back cached data from array mode */ |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 2037 | INVALIDATE_CACHED_RANGE(map, chip->start + offset, size); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2038 | |
| 2039 | xip_disable(map, chip, chip->start); |
| 2040 | if (chip->state != FL_JEDEC_QUERY) { |
| 2041 | map_write(map, CMD(0x90), chip->start); |
| 2042 | chip->state = FL_JEDEC_QUERY; |
| 2043 | } |
| 2044 | map_copy_from(map, buf, chip->start + offset, size); |
| 2045 | xip_enable(map, chip, chip->start); |
| 2046 | |
| 2047 | /* then ensure we don't keep OTP data in the cache */ |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 2048 | INVALIDATE_CACHED_RANGE(map, chip->start + offset, size); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2049 | |
| 2050 | put_chip(map, chip, chip->start); |
| 2051 | spin_unlock(chip->mutex); |
| 2052 | return 0; |
| 2053 | } |
| 2054 | |
| 2055 | static int |
| 2056 | do_otp_write(struct map_info *map, struct flchip *chip, u_long offset, |
| 2057 | u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) |
| 2058 | { |
| 2059 | int ret; |
| 2060 | |
| 2061 | while (size) { |
| 2062 | unsigned long bus_ofs = offset & ~(map_bankwidth(map)-1); |
| 2063 | int gap = offset - bus_ofs; |
| 2064 | int n = min_t(int, size, map_bankwidth(map)-gap); |
| 2065 | map_word datum = map_word_ff(map); |
| 2066 | |
| 2067 | datum = map_word_load_partial(map, datum, buf, gap, n); |
| 2068 | ret = do_write_oneword(map, chip, bus_ofs, datum, FL_OTP_WRITE); |
| 2069 | if (ret) |
| 2070 | return ret; |
| 2071 | |
| 2072 | offset += n; |
| 2073 | buf += n; |
| 2074 | size -= n; |
| 2075 | } |
| 2076 | |
| 2077 | return 0; |
| 2078 | } |
| 2079 | |
| 2080 | static int |
| 2081 | do_otp_lock(struct map_info *map, struct flchip *chip, u_long offset, |
| 2082 | u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) |
| 2083 | { |
| 2084 | struct cfi_private *cfi = map->fldrv_priv; |
| 2085 | map_word datum; |
| 2086 | |
| 2087 | /* make sure area matches group boundaries */ |
Nicolas Pitre | 332d71f | 2005-02-17 20:35:04 +0000 | [diff] [blame] | 2088 | if (size != grpsz) |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2089 | return -EXDEV; |
| 2090 | |
| 2091 | datum = map_word_ff(map); |
| 2092 | datum = map_word_clr(map, datum, CMD(1 << grpno)); |
| 2093 | return do_write_oneword(map, chip, prot, datum, FL_OTP_WRITE); |
| 2094 | } |
| 2095 | |
| 2096 | static int cfi_intelext_otp_walk(struct mtd_info *mtd, loff_t from, size_t len, |
| 2097 | size_t *retlen, u_char *buf, |
| 2098 | otp_op_t action, int user_regs) |
| 2099 | { |
| 2100 | struct map_info *map = mtd->priv; |
| 2101 | struct cfi_private *cfi = map->fldrv_priv; |
| 2102 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
| 2103 | struct flchip *chip; |
| 2104 | struct cfi_intelext_otpinfo *otp; |
| 2105 | u_long devsize, reg_prot_offset, data_offset; |
| 2106 | u_int chip_num, chip_step, field, reg_fact_size, reg_user_size; |
| 2107 | u_int groups, groupno, groupsize, reg_fact_groups, reg_user_groups; |
| 2108 | int ret; |
| 2109 | |
| 2110 | *retlen = 0; |
| 2111 | |
| 2112 | /* Check that we actually have some OTP registers */ |
| 2113 | if (!extp || !(extp->FeatureSupport & 64) || !extp->NumProtectionFields) |
| 2114 | return -ENODATA; |
| 2115 | |
| 2116 | /* we need real chips here not virtual ones */ |
| 2117 | devsize = (1 << cfi->cfiq->DevSize) * cfi->interleave; |
| 2118 | chip_step = devsize >> cfi->chipshift; |
Nicolas Pitre | dce2b4d | 2005-04-01 17:36:29 +0100 | [diff] [blame] | 2119 | chip_num = 0; |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2120 | |
Nicolas Pitre | dce2b4d | 2005-04-01 17:36:29 +0100 | [diff] [blame] | 2121 | /* Some chips have OTP located in the _top_ partition only. |
| 2122 | For example: Intel 28F256L18T (T means top-parameter device) */ |
| 2123 | if (cfi->mfr == MANUFACTURER_INTEL) { |
| 2124 | switch (cfi->id) { |
| 2125 | case 0x880b: |
| 2126 | case 0x880c: |
| 2127 | case 0x880d: |
| 2128 | chip_num = chip_step - 1; |
| 2129 | } |
| 2130 | } |
| 2131 | |
| 2132 | for ( ; chip_num < cfi->numchips; chip_num += chip_step) { |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2133 | chip = &cfi->chips[chip_num]; |
| 2134 | otp = (struct cfi_intelext_otpinfo *)&extp->extra[0]; |
| 2135 | |
| 2136 | /* first OTP region */ |
| 2137 | field = 0; |
| 2138 | reg_prot_offset = extp->ProtRegAddr; |
| 2139 | reg_fact_groups = 1; |
| 2140 | reg_fact_size = 1 << extp->FactProtRegSize; |
| 2141 | reg_user_groups = 1; |
| 2142 | reg_user_size = 1 << extp->UserProtRegSize; |
| 2143 | |
| 2144 | while (len > 0) { |
| 2145 | /* flash geometry fixup */ |
| 2146 | data_offset = reg_prot_offset + 1; |
| 2147 | data_offset *= cfi->interleave * cfi->device_type; |
| 2148 | reg_prot_offset *= cfi->interleave * cfi->device_type; |
| 2149 | reg_fact_size *= cfi->interleave; |
| 2150 | reg_user_size *= cfi->interleave; |
| 2151 | |
| 2152 | if (user_regs) { |
| 2153 | groups = reg_user_groups; |
| 2154 | groupsize = reg_user_size; |
| 2155 | /* skip over factory reg area */ |
| 2156 | groupno = reg_fact_groups; |
| 2157 | data_offset += reg_fact_groups * reg_fact_size; |
| 2158 | } else { |
| 2159 | groups = reg_fact_groups; |
| 2160 | groupsize = reg_fact_size; |
| 2161 | groupno = 0; |
| 2162 | } |
| 2163 | |
Nicolas Pitre | 332d71f | 2005-02-17 20:35:04 +0000 | [diff] [blame] | 2164 | while (len > 0 && groups > 0) { |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2165 | if (!action) { |
| 2166 | /* |
| 2167 | * Special case: if action is NULL |
| 2168 | * we fill buf with otp_info records. |
| 2169 | */ |
| 2170 | struct otp_info *otpinfo; |
| 2171 | map_word lockword; |
| 2172 | len -= sizeof(struct otp_info); |
| 2173 | if (len <= 0) |
| 2174 | return -ENOSPC; |
| 2175 | ret = do_otp_read(map, chip, |
| 2176 | reg_prot_offset, |
| 2177 | (u_char *)&lockword, |
| 2178 | map_bankwidth(map), |
| 2179 | 0, 0, 0); |
| 2180 | if (ret) |
| 2181 | return ret; |
| 2182 | otpinfo = (struct otp_info *)buf; |
| 2183 | otpinfo->start = from; |
| 2184 | otpinfo->length = groupsize; |
| 2185 | otpinfo->locked = |
| 2186 | !map_word_bitsset(map, lockword, |
| 2187 | CMD(1 << groupno)); |
| 2188 | from += groupsize; |
| 2189 | buf += sizeof(*otpinfo); |
| 2190 | *retlen += sizeof(*otpinfo); |
| 2191 | } else if (from >= groupsize) { |
| 2192 | from -= groupsize; |
Nicolas Pitre | 332d71f | 2005-02-17 20:35:04 +0000 | [diff] [blame] | 2193 | data_offset += groupsize; |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2194 | } else { |
| 2195 | int size = groupsize; |
| 2196 | data_offset += from; |
| 2197 | size -= from; |
| 2198 | from = 0; |
| 2199 | if (size > len) |
| 2200 | size = len; |
| 2201 | ret = action(map, chip, data_offset, |
| 2202 | buf, size, reg_prot_offset, |
| 2203 | groupno, groupsize); |
| 2204 | if (ret < 0) |
| 2205 | return ret; |
| 2206 | buf += size; |
| 2207 | len -= size; |
| 2208 | *retlen += size; |
Nicolas Pitre | 332d71f | 2005-02-17 20:35:04 +0000 | [diff] [blame] | 2209 | data_offset += size; |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2210 | } |
| 2211 | groupno++; |
| 2212 | groups--; |
| 2213 | } |
| 2214 | |
| 2215 | /* next OTP region */ |
| 2216 | if (++field == extp->NumProtectionFields) |
| 2217 | break; |
| 2218 | reg_prot_offset = otp->ProtRegAddr; |
| 2219 | reg_fact_groups = otp->FactGroups; |
| 2220 | reg_fact_size = 1 << otp->FactProtRegSize; |
| 2221 | reg_user_groups = otp->UserGroups; |
| 2222 | reg_user_size = 1 << otp->UserProtRegSize; |
| 2223 | otp++; |
| 2224 | } |
| 2225 | } |
| 2226 | |
| 2227 | return 0; |
| 2228 | } |
| 2229 | |
| 2230 | static int cfi_intelext_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, |
| 2231 | size_t len, size_t *retlen, |
| 2232 | u_char *buf) |
| 2233 | { |
| 2234 | return cfi_intelext_otp_walk(mtd, from, len, retlen, |
| 2235 | buf, do_otp_read, 0); |
| 2236 | } |
| 2237 | |
| 2238 | static int cfi_intelext_read_user_prot_reg(struct mtd_info *mtd, loff_t from, |
| 2239 | size_t len, size_t *retlen, |
| 2240 | u_char *buf) |
| 2241 | { |
| 2242 | return cfi_intelext_otp_walk(mtd, from, len, retlen, |
| 2243 | buf, do_otp_read, 1); |
| 2244 | } |
| 2245 | |
| 2246 | static int cfi_intelext_write_user_prot_reg(struct mtd_info *mtd, loff_t from, |
| 2247 | size_t len, size_t *retlen, |
| 2248 | u_char *buf) |
| 2249 | { |
| 2250 | return cfi_intelext_otp_walk(mtd, from, len, retlen, |
| 2251 | buf, do_otp_write, 1); |
| 2252 | } |
| 2253 | |
| 2254 | static int cfi_intelext_lock_user_prot_reg(struct mtd_info *mtd, |
| 2255 | loff_t from, size_t len) |
| 2256 | { |
| 2257 | size_t retlen; |
| 2258 | return cfi_intelext_otp_walk(mtd, from, len, &retlen, |
| 2259 | NULL, do_otp_lock, 1); |
| 2260 | } |
| 2261 | |
| 2262 | static int cfi_intelext_get_fact_prot_info(struct mtd_info *mtd, |
| 2263 | struct otp_info *buf, size_t len) |
| 2264 | { |
| 2265 | size_t retlen; |
| 2266 | int ret; |
| 2267 | |
| 2268 | ret = cfi_intelext_otp_walk(mtd, 0, len, &retlen, (u_char *)buf, NULL, 0); |
| 2269 | return ret ? : retlen; |
| 2270 | } |
| 2271 | |
| 2272 | static int cfi_intelext_get_user_prot_info(struct mtd_info *mtd, |
| 2273 | struct otp_info *buf, size_t len) |
| 2274 | { |
| 2275 | size_t retlen; |
| 2276 | int ret; |
| 2277 | |
| 2278 | ret = cfi_intelext_otp_walk(mtd, 0, len, &retlen, (u_char *)buf, NULL, 1); |
| 2279 | return ret ? : retlen; |
| 2280 | } |
| 2281 | |
| 2282 | #endif |
| 2283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2284 | static int cfi_intelext_suspend(struct mtd_info *mtd) |
| 2285 | { |
| 2286 | struct map_info *map = mtd->priv; |
| 2287 | struct cfi_private *cfi = map->fldrv_priv; |
| 2288 | int i; |
| 2289 | struct flchip *chip; |
| 2290 | int ret = 0; |
| 2291 | |
| 2292 | for (i=0; !ret && i<cfi->numchips; i++) { |
| 2293 | chip = &cfi->chips[i]; |
| 2294 | |
| 2295 | spin_lock(chip->mutex); |
| 2296 | |
| 2297 | switch (chip->state) { |
| 2298 | case FL_READY: |
| 2299 | case FL_STATUS: |
| 2300 | case FL_CFI_QUERY: |
| 2301 | case FL_JEDEC_QUERY: |
| 2302 | if (chip->oldstate == FL_READY) { |
| 2303 | chip->oldstate = chip->state; |
| 2304 | chip->state = FL_PM_SUSPENDED; |
| 2305 | /* No need to wake_up() on this state change - |
| 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]; |
| 2333 | |
| 2334 | spin_lock(chip->mutex); |
| 2335 | |
| 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 | } |
| 2346 | } |
| 2347 | |
| 2348 | return ret; |
| 2349 | } |
| 2350 | |
| 2351 | static void cfi_intelext_resume(struct mtd_info *mtd) |
| 2352 | { |
| 2353 | struct map_info *map = mtd->priv; |
| 2354 | struct cfi_private *cfi = map->fldrv_priv; |
| 2355 | int i; |
| 2356 | struct flchip *chip; |
| 2357 | |
| 2358 | for (i=0; i<cfi->numchips; i++) { |
| 2359 | |
| 2360 | chip = &cfi->chips[i]; |
| 2361 | |
| 2362 | spin_lock(chip->mutex); |
| 2363 | |
| 2364 | /* Go to known state. Chip may have been power cycled */ |
| 2365 | if (chip->state == FL_PM_SUSPENDED) { |
| 2366 | map_write(map, CMD(0xFF), cfi->chips[i].start); |
| 2367 | chip->oldstate = chip->state = FL_READY; |
| 2368 | wake_up(&chip->wq); |
| 2369 | } |
| 2370 | |
| 2371 | spin_unlock(chip->mutex); |
| 2372 | } |
| 2373 | } |
| 2374 | |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 2375 | static int cfi_intelext_reset(struct mtd_info *mtd) |
| 2376 | { |
| 2377 | struct map_info *map = mtd->priv; |
| 2378 | struct cfi_private *cfi = map->fldrv_priv; |
| 2379 | int i, ret; |
| 2380 | |
| 2381 | for (i=0; i < cfi->numchips; i++) { |
| 2382 | struct flchip *chip = &cfi->chips[i]; |
| 2383 | |
| 2384 | /* force the completion of any ongoing operation |
| 2385 | and switch to array mode so any bootloader in |
| 2386 | flash is accessible for soft reboot. */ |
| 2387 | spin_lock(chip->mutex); |
| 2388 | ret = get_chip(map, chip, chip->start, FL_SYNCING); |
| 2389 | if (!ret) { |
| 2390 | map_write(map, CMD(0xff), chip->start); |
| 2391 | chip->state = FL_READY; |
| 2392 | } |
| 2393 | spin_unlock(chip->mutex); |
| 2394 | } |
| 2395 | |
| 2396 | return 0; |
| 2397 | } |
| 2398 | |
| 2399 | static int cfi_intelext_reboot(struct notifier_block *nb, unsigned long val, |
| 2400 | void *v) |
| 2401 | { |
| 2402 | struct mtd_info *mtd; |
| 2403 | |
| 2404 | mtd = container_of(nb, struct mtd_info, reboot_notifier); |
| 2405 | cfi_intelext_reset(mtd); |
| 2406 | return NOTIFY_DONE; |
| 2407 | } |
| 2408 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2409 | static void cfi_intelext_destroy(struct mtd_info *mtd) |
| 2410 | { |
| 2411 | struct map_info *map = mtd->priv; |
| 2412 | struct cfi_private *cfi = map->fldrv_priv; |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 2413 | cfi_intelext_reset(mtd); |
| 2414 | unregister_reboot_notifier(&mtd->reboot_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2415 | kfree(cfi->cmdset_priv); |
| 2416 | kfree(cfi->cfiq); |
| 2417 | kfree(cfi->chips[0].priv); |
| 2418 | kfree(cfi); |
| 2419 | kfree(mtd->eraseregions); |
| 2420 | } |
| 2421 | |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 2422 | static char im_name_0001[] = "cfi_cmdset_0001"; |
| 2423 | static char im_name_0003[] = "cfi_cmdset_0003"; |
| 2424 | static char im_name_0200[] = "cfi_cmdset_0200"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2425 | |
| 2426 | static int __init cfi_intelext_init(void) |
| 2427 | { |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 2428 | inter_module_register(im_name_0001, THIS_MODULE, &cfi_cmdset_0001); |
| 2429 | inter_module_register(im_name_0003, THIS_MODULE, &cfi_cmdset_0001); |
| 2430 | inter_module_register(im_name_0200, THIS_MODULE, &cfi_cmdset_0001); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2431 | return 0; |
| 2432 | } |
| 2433 | |
| 2434 | static void __exit cfi_intelext_exit(void) |
| 2435 | { |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame^] | 2436 | inter_module_unregister(im_name_0001); |
| 2437 | inter_module_unregister(im_name_0003); |
| 2438 | inter_module_unregister(im_name_0200); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2439 | } |
| 2440 | |
| 2441 | module_init(cfi_intelext_init); |
| 2442 | module_exit(cfi_intelext_exit); |
| 2443 | |
| 2444 | MODULE_LICENSE("GPL"); |
| 2445 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org> et al."); |
| 2446 | MODULE_DESCRIPTION("MTD chip driver for Intel/Sharp flash chips"); |