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 | 8bc3b38 | 2005-11-23 22:07:56 +0000 | [diff] [blame] | 7 | * $Id: cfi_cmdset_0001.c,v 1.186 2005/11/23 22:07:52 nico Exp $ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 9 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 *); |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 54 | static int cfi_intelext_writev(struct mtd_info *, const struct kvec *, unsigned long, loff_t, size_t *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | static int cfi_intelext_erase_varsize(struct mtd_info *, struct erase_info *); |
| 56 | static void cfi_intelext_sync (struct mtd_info *); |
| 57 | static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, size_t len); |
| 58 | static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, size_t len); |
Todd Poynor | 8048d2f | 2005-03-31 00:57:33 +0100 | [diff] [blame] | 59 | #ifdef CONFIG_MTD_OTP |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 60 | static int cfi_intelext_read_fact_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *); |
| 61 | static int cfi_intelext_read_user_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *); |
| 62 | static int cfi_intelext_write_user_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *); |
| 63 | static int cfi_intelext_lock_user_prot_reg (struct mtd_info *, loff_t, size_t); |
| 64 | static int cfi_intelext_get_fact_prot_info (struct mtd_info *, |
| 65 | struct otp_info *, size_t); |
| 66 | static int cfi_intelext_get_user_prot_info (struct mtd_info *, |
| 67 | struct otp_info *, size_t); |
Todd Poynor | 8048d2f | 2005-03-31 00:57:33 +0100 | [diff] [blame] | 68 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | static int cfi_intelext_suspend (struct mtd_info *); |
| 70 | static void cfi_intelext_resume (struct mtd_info *); |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 71 | static int cfi_intelext_reboot (struct notifier_block *, unsigned long, void *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
| 73 | static void cfi_intelext_destroy(struct mtd_info *); |
| 74 | |
| 75 | struct mtd_info *cfi_cmdset_0001(struct map_info *, int); |
| 76 | |
| 77 | static struct mtd_info *cfi_intelext_setup (struct mtd_info *); |
| 78 | static int cfi_intelext_partition_fixup(struct mtd_info *, struct cfi_private **); |
| 79 | |
| 80 | static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, |
| 81 | size_t *retlen, u_char **mtdbuf); |
| 82 | static void cfi_intelext_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, |
| 83 | size_t len); |
| 84 | |
| 85 | static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode); |
| 86 | static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr); |
| 87 | #include "fwh_lock.h" |
| 88 | |
| 89 | |
| 90 | |
| 91 | /* |
| 92 | * *********** SETUP AND PROBE BITS *********** |
| 93 | */ |
| 94 | |
| 95 | static struct mtd_chip_driver cfi_intelext_chipdrv = { |
| 96 | .probe = NULL, /* Not usable directly */ |
| 97 | .destroy = cfi_intelext_destroy, |
| 98 | .name = "cfi_cmdset_0001", |
| 99 | .module = THIS_MODULE |
| 100 | }; |
| 101 | |
| 102 | /* #define DEBUG_LOCK_BITS */ |
| 103 | /* #define DEBUG_CFI_FEATURES */ |
| 104 | |
| 105 | #ifdef DEBUG_CFI_FEATURES |
| 106 | static void cfi_tell_features(struct cfi_pri_intelext *extp) |
| 107 | { |
| 108 | int i; |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 109 | printk(" Extended Query version %c.%c\n", extp->MajorVersion, extp->MinorVersion); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | printk(" Feature/Command Support: %4.4X\n", extp->FeatureSupport); |
| 111 | printk(" - Chip Erase: %s\n", extp->FeatureSupport&1?"supported":"unsupported"); |
| 112 | printk(" - Suspend Erase: %s\n", extp->FeatureSupport&2?"supported":"unsupported"); |
| 113 | printk(" - Suspend Program: %s\n", extp->FeatureSupport&4?"supported":"unsupported"); |
| 114 | printk(" - Legacy Lock/Unlock: %s\n", extp->FeatureSupport&8?"supported":"unsupported"); |
| 115 | printk(" - Queued Erase: %s\n", extp->FeatureSupport&16?"supported":"unsupported"); |
| 116 | printk(" - Instant block lock: %s\n", extp->FeatureSupport&32?"supported":"unsupported"); |
| 117 | printk(" - Protection Bits: %s\n", extp->FeatureSupport&64?"supported":"unsupported"); |
| 118 | printk(" - Page-mode read: %s\n", extp->FeatureSupport&128?"supported":"unsupported"); |
| 119 | printk(" - Synchronous read: %s\n", extp->FeatureSupport&256?"supported":"unsupported"); |
| 120 | printk(" - Simultaneous operations: %s\n", extp->FeatureSupport&512?"supported":"unsupported"); |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 121 | printk(" - Extended Flash Array: %s\n", extp->FeatureSupport&1024?"supported":"unsupported"); |
| 122 | for (i=11; i<32; i++) { |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 123 | if (extp->FeatureSupport & (1<<i)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | printk(" - Unknown Bit %X: supported\n", i); |
| 125 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 126 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | printk(" Supported functions after Suspend: %2.2X\n", extp->SuspendCmdSupport); |
| 128 | printk(" - Program after Erase Suspend: %s\n", extp->SuspendCmdSupport&1?"supported":"unsupported"); |
| 129 | for (i=1; i<8; i++) { |
| 130 | if (extp->SuspendCmdSupport & (1<<i)) |
| 131 | printk(" - Unknown Bit %X: supported\n", i); |
| 132 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | printk(" Block Status Register Mask: %4.4X\n", extp->BlkStatusRegMask); |
| 135 | printk(" - Lock Bit Active: %s\n", extp->BlkStatusRegMask&1?"yes":"no"); |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 136 | printk(" - Lock-Down Bit Active: %s\n", extp->BlkStatusRegMask&2?"yes":"no"); |
| 137 | for (i=2; i<3; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | if (extp->BlkStatusRegMask & (1<<i)) |
| 139 | printk(" - Unknown Bit %X Active: yes\n",i); |
| 140 | } |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 141 | printk(" - EFA Lock Bit: %s\n", extp->BlkStatusRegMask&16?"yes":"no"); |
| 142 | printk(" - EFA Lock-Down Bit: %s\n", extp->BlkStatusRegMask&32?"yes":"no"); |
| 143 | for (i=6; i<16; i++) { |
| 144 | if (extp->BlkStatusRegMask & (1<<i)) |
| 145 | printk(" - Unknown Bit %X Active: yes\n",i); |
| 146 | } |
| 147 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 148 | printk(" Vcc Logic Supply Optimum Program/Erase Voltage: %d.%d V\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | extp->VccOptimal >> 4, extp->VccOptimal & 0xf); |
| 150 | if (extp->VppOptimal) |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 151 | printk(" Vpp Programming Supply Optimum Program/Erase Voltage: %d.%d V\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | extp->VppOptimal >> 4, extp->VppOptimal & 0xf); |
| 153 | } |
| 154 | #endif |
| 155 | |
| 156 | #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 157 | /* Some Intel Strata Flash prior to FPO revision C has bugs in this area */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | static void fixup_intel_strataflash(struct mtd_info *mtd, void* param) |
| 159 | { |
| 160 | struct map_info *map = mtd->priv; |
| 161 | struct cfi_private *cfi = map->fldrv_priv; |
| 162 | struct cfi_pri_amdstd *extp = cfi->cmdset_priv; |
| 163 | |
| 164 | printk(KERN_WARNING "cfi_cmdset_0001: Suspend " |
| 165 | "erase on write disabled.\n"); |
| 166 | extp->SuspendCmdSupport &= ~1; |
| 167 | } |
| 168 | #endif |
| 169 | |
| 170 | #ifdef CMDSET0001_DISABLE_WRITE_SUSPEND |
| 171 | static void fixup_no_write_suspend(struct mtd_info *mtd, void* param) |
| 172 | { |
| 173 | struct map_info *map = mtd->priv; |
| 174 | struct cfi_private *cfi = map->fldrv_priv; |
| 175 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; |
| 176 | |
| 177 | if (cfip && (cfip->FeatureSupport&4)) { |
| 178 | cfip->FeatureSupport &= ~4; |
| 179 | printk(KERN_WARNING "cfi_cmdset_0001: write suspend disabled\n"); |
| 180 | } |
| 181 | } |
| 182 | #endif |
| 183 | |
| 184 | static void fixup_st_m28w320ct(struct mtd_info *mtd, void* param) |
| 185 | { |
| 186 | struct map_info *map = mtd->priv; |
| 187 | struct cfi_private *cfi = map->fldrv_priv; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 188 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | cfi->cfiq->BufWriteTimeoutTyp = 0; /* Not supported */ |
| 190 | cfi->cfiq->BufWriteTimeoutMax = 0; /* Not supported */ |
| 191 | } |
| 192 | |
| 193 | static void fixup_st_m28w320cb(struct mtd_info *mtd, void* param) |
| 194 | { |
| 195 | struct map_info *map = mtd->priv; |
| 196 | struct cfi_private *cfi = map->fldrv_priv; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 197 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | /* Note this is done after the region info is endian swapped */ |
| 199 | cfi->cfiq->EraseRegionInfo[1] = |
| 200 | (cfi->cfiq->EraseRegionInfo[1] & 0xffff0000) | 0x3e; |
| 201 | }; |
| 202 | |
| 203 | static void fixup_use_point(struct mtd_info *mtd, void *param) |
| 204 | { |
| 205 | struct map_info *map = mtd->priv; |
| 206 | if (!mtd->point && map_is_linear(map)) { |
| 207 | mtd->point = cfi_intelext_point; |
| 208 | mtd->unpoint = cfi_intelext_unpoint; |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | static void fixup_use_write_buffers(struct mtd_info *mtd, void *param) |
| 213 | { |
| 214 | struct map_info *map = mtd->priv; |
| 215 | struct cfi_private *cfi = map->fldrv_priv; |
| 216 | if (cfi->cfiq->BufWriteTimeoutTyp) { |
| 217 | printk(KERN_INFO "Using buffer write method\n" ); |
| 218 | mtd->write = cfi_intelext_write_buffers; |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 219 | mtd->writev = cfi_intelext_writev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | } |
| 221 | } |
| 222 | |
| 223 | static struct cfi_fixup cfi_fixup_table[] = { |
| 224 | #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 225 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_intel_strataflash, NULL }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | #endif |
| 227 | #ifdef CMDSET0001_DISABLE_WRITE_SUSPEND |
| 228 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_no_write_suspend, NULL }, |
| 229 | #endif |
| 230 | #if !FORCE_WORD_WRITE |
| 231 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL }, |
| 232 | #endif |
| 233 | { CFI_MFR_ST, 0x00ba, /* M28W320CT */ fixup_st_m28w320ct, NULL }, |
| 234 | { CFI_MFR_ST, 0x00bb, /* M28W320CB */ fixup_st_m28w320cb, NULL }, |
| 235 | { 0, 0, NULL, NULL } |
| 236 | }; |
| 237 | |
| 238 | static struct cfi_fixup jedec_fixup_table[] = { |
| 239 | { MANUFACTURER_INTEL, I82802AB, fixup_use_fwh_lock, NULL, }, |
| 240 | { MANUFACTURER_INTEL, I82802AC, fixup_use_fwh_lock, NULL, }, |
| 241 | { MANUFACTURER_ST, M50LPW080, fixup_use_fwh_lock, NULL, }, |
| 242 | { 0, 0, NULL, NULL } |
| 243 | }; |
| 244 | static struct cfi_fixup fixup_table[] = { |
| 245 | /* The CFI vendor ids and the JEDEC vendor IDs appear |
| 246 | * to be common. It is like the devices id's are as |
| 247 | * well. This table is to pick all cases where |
| 248 | * we know that is the case. |
| 249 | */ |
| 250 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_point, NULL }, |
| 251 | { 0, 0, NULL, NULL } |
| 252 | }; |
| 253 | |
| 254 | static inline struct cfi_pri_intelext * |
| 255 | read_pri_intelext(struct map_info *map, __u16 adr) |
| 256 | { |
| 257 | struct cfi_pri_intelext *extp; |
| 258 | unsigned int extp_size = sizeof(*extp); |
| 259 | |
| 260 | again: |
| 261 | extp = (struct cfi_pri_intelext *)cfi_read_pri(map, adr, extp_size, "Intel/Sharp"); |
| 262 | if (!extp) |
| 263 | return NULL; |
| 264 | |
Todd Poynor | d88f977 | 2005-07-20 22:01:17 +0100 | [diff] [blame] | 265 | if (extp->MajorVersion != '1' || |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 266 | (extp->MinorVersion < '0' || extp->MinorVersion > '4')) { |
Todd Poynor | d88f977 | 2005-07-20 22:01:17 +0100 | [diff] [blame] | 267 | printk(KERN_ERR " Unknown Intel/Sharp Extended Query " |
| 268 | "version %c.%c.\n", extp->MajorVersion, |
| 269 | extp->MinorVersion); |
| 270 | kfree(extp); |
| 271 | return NULL; |
| 272 | } |
| 273 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | /* Do some byteswapping if necessary */ |
| 275 | extp->FeatureSupport = le32_to_cpu(extp->FeatureSupport); |
| 276 | extp->BlkStatusRegMask = le16_to_cpu(extp->BlkStatusRegMask); |
| 277 | extp->ProtRegAddr = le16_to_cpu(extp->ProtRegAddr); |
| 278 | |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 279 | if (extp->MajorVersion == '1' && extp->MinorVersion >= '3') { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | unsigned int extra_size = 0; |
| 281 | int nb_parts, i; |
| 282 | |
| 283 | /* Protection Register info */ |
Nicolas Pitre | 72b56a2 | 2005-02-05 02:06:19 +0000 | [diff] [blame] | 284 | extra_size += (extp->NumProtectionFields - 1) * |
| 285 | sizeof(struct cfi_intelext_otpinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | |
| 287 | /* Burst Read info */ |
Nicolas Pitre | 6f6ed05 | 2005-10-25 21:28:43 +0100 | [diff] [blame] | 288 | extra_size += 2; |
| 289 | if (extp_size < sizeof(*extp) + extra_size) |
| 290 | goto need_more; |
| 291 | extra_size += extp->extra[extra_size-1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
| 293 | /* Number of hardware-partitions */ |
| 294 | extra_size += 1; |
| 295 | if (extp_size < sizeof(*extp) + extra_size) |
| 296 | goto need_more; |
| 297 | nb_parts = extp->extra[extra_size - 1]; |
| 298 | |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 299 | /* skip the sizeof(partregion) field in CFI 1.4 */ |
| 300 | if (extp->MinorVersion >= '4') |
| 301 | extra_size += 2; |
| 302 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | for (i = 0; i < nb_parts; i++) { |
| 304 | struct cfi_intelext_regioninfo *rinfo; |
| 305 | rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[extra_size]; |
| 306 | extra_size += sizeof(*rinfo); |
| 307 | if (extp_size < sizeof(*extp) + extra_size) |
| 308 | goto need_more; |
| 309 | rinfo->NumIdentPartitions=le16_to_cpu(rinfo->NumIdentPartitions); |
| 310 | extra_size += (rinfo->NumBlockTypes - 1) |
| 311 | * sizeof(struct cfi_intelext_blockinfo); |
| 312 | } |
| 313 | |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 314 | if (extp->MinorVersion >= '4') |
| 315 | extra_size += sizeof(struct cfi_intelext_programming_regioninfo); |
| 316 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | if (extp_size < sizeof(*extp) + extra_size) { |
| 318 | need_more: |
| 319 | extp_size = sizeof(*extp) + extra_size; |
| 320 | kfree(extp); |
| 321 | if (extp_size > 4096) { |
| 322 | printk(KERN_ERR |
| 323 | "%s: cfi_pri_intelext is too fat\n", |
| 324 | __FUNCTION__); |
| 325 | return NULL; |
| 326 | } |
| 327 | goto again; |
| 328 | } |
| 329 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 330 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | return extp; |
| 332 | } |
| 333 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | struct mtd_info *cfi_cmdset_0001(struct map_info *map, int primary) |
| 335 | { |
| 336 | struct cfi_private *cfi = map->fldrv_priv; |
| 337 | struct mtd_info *mtd; |
| 338 | int i; |
| 339 | |
| 340 | mtd = kmalloc(sizeof(*mtd), GFP_KERNEL); |
| 341 | if (!mtd) { |
| 342 | printk(KERN_ERR "Failed to allocate memory for MTD device\n"); |
| 343 | return NULL; |
| 344 | } |
| 345 | memset(mtd, 0, sizeof(*mtd)); |
| 346 | mtd->priv = map; |
| 347 | mtd->type = MTD_NORFLASH; |
| 348 | |
| 349 | /* Fill in the default mtd operations */ |
| 350 | mtd->erase = cfi_intelext_erase_varsize; |
| 351 | mtd->read = cfi_intelext_read; |
| 352 | mtd->write = cfi_intelext_write_words; |
| 353 | mtd->sync = cfi_intelext_sync; |
| 354 | mtd->lock = cfi_intelext_lock; |
| 355 | mtd->unlock = cfi_intelext_unlock; |
| 356 | mtd->suspend = cfi_intelext_suspend; |
| 357 | mtd->resume = cfi_intelext_resume; |
| 358 | mtd->flags = MTD_CAP_NORFLASH; |
| 359 | mtd->name = map->name; |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 360 | |
| 361 | mtd->reboot_notifier.notifier_call = cfi_intelext_reboot; |
| 362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | if (cfi->cfi_mode == CFI_MODE_CFI) { |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 364 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | * It's a real CFI chip, not one for which the probe |
| 366 | * routine faked a CFI structure. So we read the feature |
| 367 | * table from it. |
| 368 | */ |
| 369 | __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR; |
| 370 | struct cfi_pri_intelext *extp; |
| 371 | |
| 372 | extp = read_pri_intelext(map, adr); |
| 373 | if (!extp) { |
| 374 | kfree(mtd); |
| 375 | return NULL; |
| 376 | } |
| 377 | |
| 378 | /* Install our own private info structure */ |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 379 | cfi->cmdset_priv = extp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | |
| 381 | cfi_fixup(mtd, cfi_fixup_table); |
| 382 | |
| 383 | #ifdef DEBUG_CFI_FEATURES |
| 384 | /* Tell the user about it in lots of lovely detail */ |
| 385 | cfi_tell_features(extp); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 386 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | |
| 388 | if(extp->SuspendCmdSupport & 1) { |
| 389 | printk(KERN_NOTICE "cfi_cmdset_0001: Erase suspend on write enabled\n"); |
| 390 | } |
| 391 | } |
| 392 | else if (cfi->cfi_mode == CFI_MODE_JEDEC) { |
| 393 | /* Apply jedec specific fixups */ |
| 394 | cfi_fixup(mtd, jedec_fixup_table); |
| 395 | } |
| 396 | /* Apply generic fixups */ |
| 397 | cfi_fixup(mtd, fixup_table); |
| 398 | |
| 399 | for (i=0; i< cfi->numchips; i++) { |
| 400 | cfi->chips[i].word_write_time = 1<<cfi->cfiq->WordWriteTimeoutTyp; |
| 401 | cfi->chips[i].buffer_write_time = 1<<cfi->cfiq->BufWriteTimeoutTyp; |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 402 | cfi->chips[i].erase_time = 1000<<cfi->cfiq->BlockEraseTimeoutTyp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | cfi->chips[i].ref_point_counter = 0; |
Simon Vogl | c314b6f | 2006-02-24 13:04:09 -0800 | [diff] [blame] | 404 | init_waitqueue_head(&(cfi->chips[i].wq)); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 405 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | |
| 407 | map->fldrv = &cfi_intelext_chipdrv; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 408 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | return cfi_intelext_setup(mtd); |
| 410 | } |
David Woodhouse | a15bdee | 2006-05-08 22:35:05 +0100 | [diff] [blame] | 411 | struct mtd_info *cfi_cmdset_0003(struct map_info *map, int primary) __attribute__((alias("cfi_cmdset_0001"))); |
| 412 | struct mtd_info *cfi_cmdset_0200(struct map_info *map, int primary) __attribute__((alias("cfi_cmdset_0001"))); |
| 413 | EXPORT_SYMBOL_GPL(cfi_cmdset_0001); |
| 414 | EXPORT_SYMBOL_GPL(cfi_cmdset_0003); |
| 415 | EXPORT_SYMBOL_GPL(cfi_cmdset_0200); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | |
| 417 | static struct mtd_info *cfi_intelext_setup(struct mtd_info *mtd) |
| 418 | { |
| 419 | struct map_info *map = mtd->priv; |
| 420 | struct cfi_private *cfi = map->fldrv_priv; |
| 421 | unsigned long offset = 0; |
| 422 | int i,j; |
| 423 | unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave; |
| 424 | |
| 425 | //printk(KERN_DEBUG "number of CFI chips: %d\n", cfi->numchips); |
| 426 | |
| 427 | mtd->size = devsize * cfi->numchips; |
| 428 | |
| 429 | mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 430 | mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | * mtd->numeraseregions, GFP_KERNEL); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 432 | if (!mtd->eraseregions) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | printk(KERN_ERR "Failed to allocate memory for MTD erase region info\n"); |
| 434 | goto setup_err; |
| 435 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 436 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | for (i=0; i<cfi->cfiq->NumEraseRegions; i++) { |
| 438 | unsigned long ernum, ersize; |
| 439 | ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave; |
| 440 | ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1; |
| 441 | |
| 442 | if (mtd->erasesize < ersize) { |
| 443 | mtd->erasesize = ersize; |
| 444 | } |
| 445 | for (j=0; j<cfi->numchips; j++) { |
| 446 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset; |
| 447 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize; |
| 448 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum; |
| 449 | } |
| 450 | offset += (ersize * ernum); |
| 451 | } |
| 452 | |
| 453 | if (offset != devsize) { |
| 454 | /* Argh */ |
| 455 | printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize); |
| 456 | goto setup_err; |
| 457 | } |
| 458 | |
| 459 | for (i=0; i<mtd->numeraseregions;i++){ |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 460 | 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] | 461 | i,mtd->eraseregions[i].offset, |
| 462 | mtd->eraseregions[i].erasesize, |
| 463 | mtd->eraseregions[i].numblocks); |
| 464 | } |
| 465 | |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 466 | #ifdef CONFIG_MTD_OTP |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | mtd->read_fact_prot_reg = cfi_intelext_read_fact_prot_reg; |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 468 | mtd->read_user_prot_reg = cfi_intelext_read_user_prot_reg; |
| 469 | mtd->write_user_prot_reg = cfi_intelext_write_user_prot_reg; |
| 470 | mtd->lock_user_prot_reg = cfi_intelext_lock_user_prot_reg; |
| 471 | mtd->get_fact_prot_info = cfi_intelext_get_fact_prot_info; |
| 472 | mtd->get_user_prot_info = cfi_intelext_get_user_prot_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | #endif |
| 474 | |
| 475 | /* This function has the potential to distort the reality |
| 476 | a bit and therefore should be called last. */ |
| 477 | if (cfi_intelext_partition_fixup(mtd, &cfi) != 0) |
| 478 | goto setup_err; |
| 479 | |
| 480 | __module_get(THIS_MODULE); |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 481 | register_reboot_notifier(&mtd->reboot_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | return mtd; |
| 483 | |
| 484 | setup_err: |
| 485 | if(mtd) { |
Jesper Juhl | fa67164 | 2005-11-07 01:01:27 -0800 | [diff] [blame] | 486 | kfree(mtd->eraseregions); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | kfree(mtd); |
| 488 | } |
| 489 | kfree(cfi->cmdset_priv); |
| 490 | return NULL; |
| 491 | } |
| 492 | |
| 493 | static int cfi_intelext_partition_fixup(struct mtd_info *mtd, |
| 494 | struct cfi_private **pcfi) |
| 495 | { |
| 496 | struct map_info *map = mtd->priv; |
| 497 | struct cfi_private *cfi = *pcfi; |
| 498 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
| 499 | |
| 500 | /* |
| 501 | * Probing of multi-partition flash ships. |
| 502 | * |
| 503 | * To support multiple partitions when available, we simply arrange |
| 504 | * for each of them to have their own flchip structure even if they |
| 505 | * are on the same physical chip. This means completely recreating |
| 506 | * a new cfi_private structure right here which is a blatent code |
| 507 | * layering violation, but this is still the least intrusive |
| 508 | * arrangement at this point. This can be rearranged in the future |
| 509 | * if someone feels motivated enough. --nico |
| 510 | */ |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 511 | if (extp && extp->MajorVersion == '1' && extp->MinorVersion >= '3' |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | && extp->FeatureSupport & (1 << 9)) { |
| 513 | struct cfi_private *newcfi; |
| 514 | struct flchip *chip; |
| 515 | struct flchip_shared *shared; |
| 516 | int offs, numregions, numparts, partshift, numvirtchips, i, j; |
| 517 | |
| 518 | /* Protection Register info */ |
Nicolas Pitre | 72b56a2 | 2005-02-05 02:06:19 +0000 | [diff] [blame] | 519 | offs = (extp->NumProtectionFields - 1) * |
| 520 | sizeof(struct cfi_intelext_otpinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | |
| 522 | /* Burst Read info */ |
Nicolas Pitre | 6f6ed05 | 2005-10-25 21:28:43 +0100 | [diff] [blame] | 523 | offs += extp->extra[offs+1]+2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | |
| 525 | /* Number of partition regions */ |
| 526 | numregions = extp->extra[offs]; |
| 527 | offs += 1; |
| 528 | |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 529 | /* skip the sizeof(partregion) field in CFI 1.4 */ |
| 530 | if (extp->MinorVersion >= '4') |
| 531 | offs += 2; |
| 532 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | /* Number of hardware partitions */ |
| 534 | numparts = 0; |
| 535 | for (i = 0; i < numregions; i++) { |
| 536 | struct cfi_intelext_regioninfo *rinfo; |
| 537 | rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[offs]; |
| 538 | numparts += rinfo->NumIdentPartitions; |
| 539 | offs += sizeof(*rinfo) |
| 540 | + (rinfo->NumBlockTypes - 1) * |
| 541 | sizeof(struct cfi_intelext_blockinfo); |
| 542 | } |
| 543 | |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 544 | /* Programming Region info */ |
| 545 | if (extp->MinorVersion >= '4') { |
| 546 | struct cfi_intelext_programming_regioninfo *prinfo; |
| 547 | prinfo = (struct cfi_intelext_programming_regioninfo *)&extp->extra[offs]; |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 548 | mtd->writesize = cfi->interleave << prinfo->ProgRegShift; |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 549 | MTD_PROGREGION_CTRLMODE_VALID(mtd) = cfi->interleave * prinfo->ControlValid; |
| 550 | MTD_PROGREGION_CTRLMODE_INVALID(mtd) = cfi->interleave * prinfo->ControlInvalid; |
Joern Engel | 5fa4339 | 2006-05-22 23:18:29 +0200 | [diff] [blame] | 551 | mtd->flags &= ~MTD_BIT_WRITEABLE; |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 552 | printk(KERN_DEBUG "%s: program region size/ctrl_valid/ctrl_inval = %d/%d/%d\n", |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 553 | map->name, mtd->writesize, |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 554 | MTD_PROGREGION_CTRLMODE_VALID(mtd), |
| 555 | MTD_PROGREGION_CTRLMODE_INVALID(mtd)); |
| 556 | } |
| 557 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | /* |
| 559 | * All functions below currently rely on all chips having |
| 560 | * the same geometry so we'll just assume that all hardware |
| 561 | * partitions are of the same size too. |
| 562 | */ |
| 563 | partshift = cfi->chipshift - __ffs(numparts); |
| 564 | |
| 565 | if ((1 << partshift) < mtd->erasesize) { |
| 566 | printk( KERN_ERR |
| 567 | "%s: bad number of hw partitions (%d)\n", |
| 568 | __FUNCTION__, numparts); |
| 569 | return -EINVAL; |
| 570 | } |
| 571 | |
| 572 | numvirtchips = cfi->numchips * numparts; |
| 573 | newcfi = kmalloc(sizeof(struct cfi_private) + numvirtchips * sizeof(struct flchip), GFP_KERNEL); |
| 574 | if (!newcfi) |
| 575 | return -ENOMEM; |
| 576 | shared = kmalloc(sizeof(struct flchip_shared) * cfi->numchips, GFP_KERNEL); |
| 577 | if (!shared) { |
| 578 | kfree(newcfi); |
| 579 | return -ENOMEM; |
| 580 | } |
| 581 | memcpy(newcfi, cfi, sizeof(struct cfi_private)); |
| 582 | newcfi->numchips = numvirtchips; |
| 583 | newcfi->chipshift = partshift; |
| 584 | |
| 585 | chip = &newcfi->chips[0]; |
| 586 | for (i = 0; i < cfi->numchips; i++) { |
| 587 | shared[i].writing = shared[i].erasing = NULL; |
| 588 | spin_lock_init(&shared[i].lock); |
| 589 | for (j = 0; j < numparts; j++) { |
| 590 | *chip = cfi->chips[i]; |
| 591 | chip->start += j << partshift; |
| 592 | chip->priv = &shared[i]; |
| 593 | /* those should be reset too since |
| 594 | they create memory references. */ |
| 595 | init_waitqueue_head(&chip->wq); |
| 596 | spin_lock_init(&chip->_spinlock); |
| 597 | chip->mutex = &chip->_spinlock; |
| 598 | chip++; |
| 599 | } |
| 600 | } |
| 601 | |
| 602 | printk(KERN_DEBUG "%s: %d set(s) of %d interleaved chips " |
| 603 | "--> %d partitions of %d KiB\n", |
| 604 | map->name, cfi->numchips, cfi->interleave, |
| 605 | newcfi->numchips, 1<<(newcfi->chipshift-10)); |
| 606 | |
| 607 | map->fldrv_priv = newcfi; |
| 608 | *pcfi = newcfi; |
| 609 | kfree(cfi); |
| 610 | } |
| 611 | |
| 612 | return 0; |
| 613 | } |
| 614 | |
| 615 | /* |
| 616 | * *********** CHIP ACCESS FUNCTIONS *********** |
| 617 | */ |
| 618 | |
| 619 | static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode) |
| 620 | { |
| 621 | DECLARE_WAITQUEUE(wait, current); |
| 622 | struct cfi_private *cfi = map->fldrv_priv; |
| 623 | map_word status, status_OK = CMD(0x80), status_PWS = CMD(0x01); |
| 624 | unsigned long timeo; |
| 625 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; |
| 626 | |
| 627 | resettime: |
| 628 | timeo = jiffies + HZ; |
| 629 | retry: |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 630 | 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] | 631 | /* |
| 632 | * OK. We have possibility for contension on the write/erase |
| 633 | * operations which are global to the real chip and not per |
| 634 | * partition. So let's fight it over in the partition which |
| 635 | * currently has authority on the operation. |
| 636 | * |
| 637 | * The rules are as follows: |
| 638 | * |
| 639 | * - any write operation must own shared->writing. |
| 640 | * |
| 641 | * - any erase operation must own _both_ shared->writing and |
| 642 | * shared->erasing. |
| 643 | * |
| 644 | * - contension arbitration is handled in the owner's context. |
| 645 | * |
Nicolas Pitre | 8bc3b38 | 2005-11-23 22:07:56 +0000 | [diff] [blame] | 646 | * The 'shared' struct can be read and/or written only when |
| 647 | * its lock is taken. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | */ |
| 649 | struct flchip_shared *shared = chip->priv; |
| 650 | struct flchip *contender; |
| 651 | spin_lock(&shared->lock); |
| 652 | contender = shared->writing; |
| 653 | if (contender && contender != chip) { |
| 654 | /* |
| 655 | * The engine to perform desired operation on this |
| 656 | * partition is already in use by someone else. |
| 657 | * Let's fight over it in the context of the chip |
| 658 | * currently using it. If it is possible to suspend, |
| 659 | * that other partition will do just that, otherwise |
| 660 | * it'll happily send us to sleep. In any case, when |
| 661 | * get_chip returns success we're clear to go ahead. |
| 662 | */ |
| 663 | int ret = spin_trylock(contender->mutex); |
| 664 | spin_unlock(&shared->lock); |
| 665 | if (!ret) |
| 666 | goto retry; |
| 667 | spin_unlock(chip->mutex); |
| 668 | ret = get_chip(map, contender, contender->start, mode); |
| 669 | spin_lock(chip->mutex); |
| 670 | if (ret) { |
| 671 | spin_unlock(contender->mutex); |
| 672 | return ret; |
| 673 | } |
| 674 | timeo = jiffies + HZ; |
| 675 | spin_lock(&shared->lock); |
Nicolas Pitre | 8bc3b38 | 2005-11-23 22:07:56 +0000 | [diff] [blame] | 676 | spin_unlock(contender->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | } |
| 678 | |
| 679 | /* We now own it */ |
| 680 | shared->writing = chip; |
| 681 | if (mode == FL_ERASING) |
| 682 | shared->erasing = chip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | spin_unlock(&shared->lock); |
| 684 | } |
| 685 | |
| 686 | switch (chip->state) { |
| 687 | |
| 688 | case FL_STATUS: |
| 689 | for (;;) { |
| 690 | status = map_read(map, adr); |
| 691 | if (map_word_andequal(map, status, status_OK, status_OK)) |
| 692 | break; |
| 693 | |
| 694 | /* At this point we're fine with write operations |
| 695 | in other partitions as they don't conflict. */ |
| 696 | if (chip->priv && map_word_andequal(map, status, status_PWS, status_PWS)) |
| 697 | break; |
| 698 | |
| 699 | if (time_after(jiffies, timeo)) { |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 700 | printk(KERN_ERR "%s: Waiting for chip to be ready timed out. Status %lx\n", |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 701 | map->name, status.x[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | return -EIO; |
| 703 | } |
| 704 | spin_unlock(chip->mutex); |
| 705 | cfi_udelay(1); |
| 706 | spin_lock(chip->mutex); |
| 707 | /* Someone else might have been playing with it. */ |
| 708 | goto retry; |
| 709 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 710 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | case FL_READY: |
| 712 | case FL_CFI_QUERY: |
| 713 | case FL_JEDEC_QUERY: |
| 714 | return 0; |
| 715 | |
| 716 | case FL_ERASING: |
| 717 | if (!cfip || |
| 718 | !(cfip->FeatureSupport & 2) || |
| 719 | !(mode == FL_READY || mode == FL_POINT || |
| 720 | (mode == FL_WRITING && (cfip->SuspendCmdSupport & 1)))) |
| 721 | goto sleep; |
| 722 | |
| 723 | |
| 724 | /* Erase suspend */ |
| 725 | map_write(map, CMD(0xB0), adr); |
| 726 | |
| 727 | /* If the flash has finished erasing, then 'erase suspend' |
| 728 | * appears to make some (28F320) flash devices switch to |
| 729 | * 'read' mode. Make sure that we switch to 'read status' |
| 730 | * mode so we get the right data. --rmk |
| 731 | */ |
| 732 | map_write(map, CMD(0x70), adr); |
| 733 | chip->oldstate = FL_ERASING; |
| 734 | chip->state = FL_ERASE_SUSPENDING; |
| 735 | chip->erase_suspended = 1; |
| 736 | for (;;) { |
| 737 | status = map_read(map, adr); |
| 738 | if (map_word_andequal(map, status, status_OK, status_OK)) |
| 739 | break; |
| 740 | |
| 741 | if (time_after(jiffies, timeo)) { |
| 742 | /* Urgh. Resume and pretend we weren't here. */ |
| 743 | map_write(map, CMD(0xd0), adr); |
| 744 | /* Make sure we're in 'read status' mode if it had finished */ |
| 745 | map_write(map, CMD(0x70), adr); |
| 746 | chip->state = FL_ERASING; |
| 747 | chip->oldstate = FL_READY; |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 748 | printk(KERN_ERR "%s: Chip not ready after erase " |
| 749 | "suspended: status = 0x%lx\n", map->name, status.x[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | return -EIO; |
| 751 | } |
| 752 | |
| 753 | spin_unlock(chip->mutex); |
| 754 | cfi_udelay(1); |
| 755 | spin_lock(chip->mutex); |
| 756 | /* Nobody will touch it while it's in state FL_ERASE_SUSPENDING. |
| 757 | So we can just loop here. */ |
| 758 | } |
| 759 | chip->state = FL_STATUS; |
| 760 | return 0; |
| 761 | |
| 762 | case FL_XIP_WHILE_ERASING: |
| 763 | if (mode != FL_READY && mode != FL_POINT && |
| 764 | (mode != FL_WRITING || !cfip || !(cfip->SuspendCmdSupport&1))) |
| 765 | goto sleep; |
| 766 | chip->oldstate = chip->state; |
| 767 | chip->state = FL_READY; |
| 768 | return 0; |
| 769 | |
| 770 | case FL_POINT: |
| 771 | /* Only if there's no operation suspended... */ |
| 772 | if (mode == FL_READY && chip->oldstate == FL_READY) |
| 773 | return 0; |
| 774 | |
| 775 | default: |
| 776 | sleep: |
| 777 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 778 | add_wait_queue(&chip->wq, &wait); |
| 779 | spin_unlock(chip->mutex); |
| 780 | schedule(); |
| 781 | remove_wait_queue(&chip->wq, &wait); |
| 782 | spin_lock(chip->mutex); |
| 783 | goto resettime; |
| 784 | } |
| 785 | } |
| 786 | |
| 787 | static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr) |
| 788 | { |
| 789 | struct cfi_private *cfi = map->fldrv_priv; |
| 790 | |
| 791 | if (chip->priv) { |
| 792 | struct flchip_shared *shared = chip->priv; |
| 793 | spin_lock(&shared->lock); |
| 794 | if (shared->writing == chip && chip->oldstate == FL_READY) { |
| 795 | /* We own the ability to write, but we're done */ |
| 796 | shared->writing = shared->erasing; |
| 797 | if (shared->writing && shared->writing != chip) { |
| 798 | /* give back ownership to who we loaned it from */ |
| 799 | struct flchip *loaner = shared->writing; |
| 800 | spin_lock(loaner->mutex); |
| 801 | spin_unlock(&shared->lock); |
| 802 | spin_unlock(chip->mutex); |
| 803 | put_chip(map, loaner, loaner->start); |
| 804 | spin_lock(chip->mutex); |
| 805 | spin_unlock(loaner->mutex); |
| 806 | wake_up(&chip->wq); |
| 807 | return; |
| 808 | } |
| 809 | shared->erasing = NULL; |
| 810 | shared->writing = NULL; |
| 811 | } else if (shared->erasing == chip && shared->writing != chip) { |
| 812 | /* |
| 813 | * We own the ability to erase without the ability |
| 814 | * to write, which means the erase was suspended |
| 815 | * and some other partition is currently writing. |
| 816 | * Don't let the switch below mess things up since |
| 817 | * we don't have ownership to resume anything. |
| 818 | */ |
| 819 | spin_unlock(&shared->lock); |
| 820 | wake_up(&chip->wq); |
| 821 | return; |
| 822 | } |
| 823 | spin_unlock(&shared->lock); |
| 824 | } |
| 825 | |
| 826 | switch(chip->oldstate) { |
| 827 | case FL_ERASING: |
| 828 | chip->state = chip->oldstate; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 829 | /* What if one interleaved chip has finished and the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | other hasn't? The old code would leave the finished |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 831 | one in READY mode. That's bad, and caused -EROFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | errors to be returned from do_erase_oneblock because |
| 833 | that's the only bit it checked for at the time. |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 834 | As the state machine appears to explicitly allow |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | sending the 0x70 (Read Status) command to an erasing |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 836 | chip and expecting it to be ignored, that's what we |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | do. */ |
| 838 | map_write(map, CMD(0xd0), adr); |
| 839 | map_write(map, CMD(0x70), adr); |
| 840 | chip->oldstate = FL_READY; |
| 841 | chip->state = FL_ERASING; |
| 842 | break; |
| 843 | |
| 844 | case FL_XIP_WHILE_ERASING: |
| 845 | chip->state = chip->oldstate; |
| 846 | chip->oldstate = FL_READY; |
| 847 | break; |
| 848 | |
| 849 | case FL_READY: |
| 850 | case FL_STATUS: |
| 851 | case FL_JEDEC_QUERY: |
| 852 | /* We should really make set_vpp() count, rather than doing this */ |
| 853 | DISABLE_VPP(map); |
| 854 | break; |
| 855 | default: |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 856 | 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] | 857 | } |
| 858 | wake_up(&chip->wq); |
| 859 | } |
| 860 | |
| 861 | #ifdef CONFIG_MTD_XIP |
| 862 | |
| 863 | /* |
| 864 | * No interrupt what so ever can be serviced while the flash isn't in array |
| 865 | * mode. This is ensured by the xip_disable() and xip_enable() functions |
| 866 | * enclosing any code path where the flash is known not to be in array mode. |
| 867 | * And within a XIP disabled code path, only functions marked with __xipram |
| 868 | * may be called and nothing else (it's a good thing to inspect generated |
| 869 | * assembly to make sure inline functions were actually inlined and that gcc |
| 870 | * didn't emit calls to its own support functions). Also configuring MTD CFI |
| 871 | * support to a single buswidth and a single interleave is also recommended. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | */ |
| 873 | |
| 874 | static void xip_disable(struct map_info *map, struct flchip *chip, |
| 875 | unsigned long adr) |
| 876 | { |
| 877 | /* TODO: chips with no XIP use should ignore and return */ |
| 878 | (void) map_read(map, adr); /* ensure mmu mapping is up to date */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | local_irq_disable(); |
| 880 | } |
| 881 | |
| 882 | static void __xipram xip_enable(struct map_info *map, struct flchip *chip, |
| 883 | unsigned long adr) |
| 884 | { |
| 885 | struct cfi_private *cfi = map->fldrv_priv; |
| 886 | if (chip->state != FL_POINT && chip->state != FL_READY) { |
| 887 | map_write(map, CMD(0xff), adr); |
| 888 | chip->state = FL_READY; |
| 889 | } |
| 890 | (void) map_read(map, adr); |
Thomas Gleixner | 97f927a | 2005-07-07 16:50:16 +0200 | [diff] [blame] | 891 | xip_iprefetch(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | local_irq_enable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | } |
| 894 | |
| 895 | /* |
| 896 | * When a delay is required for the flash operation to complete, the |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 897 | * xip_wait_for_operation() function is polling for both the given timeout |
| 898 | * and pending (but still masked) hardware interrupts. Whenever there is an |
| 899 | * interrupt pending then the flash erase or write operation is suspended, |
| 900 | * array mode restored and interrupts unmasked. Task scheduling might also |
| 901 | * happen at that point. The CPU eventually returns from the interrupt or |
| 902 | * the call to schedule() and the suspended flash operation is resumed for |
| 903 | * the remaining of the delay period. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | * |
| 905 | * Warning: this function _will_ fool interrupt latency tracing tools. |
| 906 | */ |
| 907 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 908 | static int __xipram xip_wait_for_operation( |
| 909 | struct map_info *map, struct flchip *chip, |
| 910 | unsigned long adr, int *chip_op_time ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | { |
| 912 | struct cfi_private *cfi = map->fldrv_priv; |
| 913 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; |
| 914 | map_word status, OK = CMD(0x80); |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 915 | unsigned long usec, suspended, start, done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | flstate_t oldstate, newstate; |
| 917 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 918 | start = xip_currtime(); |
| 919 | usec = *chip_op_time * 8; |
| 920 | if (usec == 0) |
| 921 | usec = 500000; |
| 922 | done = 0; |
| 923 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | do { |
| 925 | cpu_relax(); |
| 926 | if (xip_irqpending() && cfip && |
| 927 | ((chip->state == FL_ERASING && (cfip->FeatureSupport&2)) || |
| 928 | (chip->state == FL_WRITING && (cfip->FeatureSupport&4))) && |
| 929 | (cfi_interleave_is_1(cfi) || chip->oldstate == FL_READY)) { |
| 930 | /* |
| 931 | * Let's suspend the erase or write operation when |
| 932 | * supported. Note that we currently don't try to |
| 933 | * suspend interleaved chips if there is already |
| 934 | * another operation suspended (imagine what happens |
| 935 | * when one chip was already done with the current |
| 936 | * operation while another chip suspended it, then |
| 937 | * we resume the whole thing at once). Yes, it |
| 938 | * can happen! |
| 939 | */ |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 940 | usec -= done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | map_write(map, CMD(0xb0), adr); |
| 942 | map_write(map, CMD(0x70), adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | suspended = xip_currtime(); |
| 944 | do { |
| 945 | if (xip_elapsed_since(suspended) > 100000) { |
| 946 | /* |
| 947 | * The chip doesn't want to suspend |
| 948 | * after waiting for 100 msecs. |
| 949 | * This is a critical error but there |
| 950 | * is not much we can do here. |
| 951 | */ |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 952 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | } |
| 954 | status = map_read(map, adr); |
| 955 | } while (!map_word_andequal(map, status, OK, OK)); |
| 956 | |
| 957 | /* Suspend succeeded */ |
| 958 | oldstate = chip->state; |
| 959 | if (oldstate == FL_ERASING) { |
| 960 | if (!map_word_bitsset(map, status, CMD(0x40))) |
| 961 | break; |
| 962 | newstate = FL_XIP_WHILE_ERASING; |
| 963 | chip->erase_suspended = 1; |
| 964 | } else { |
| 965 | if (!map_word_bitsset(map, status, CMD(0x04))) |
| 966 | break; |
| 967 | newstate = FL_XIP_WHILE_WRITING; |
| 968 | chip->write_suspended = 1; |
| 969 | } |
| 970 | chip->state = newstate; |
| 971 | map_write(map, CMD(0xff), adr); |
| 972 | (void) map_read(map, adr); |
| 973 | asm volatile (".rep 8; nop; .endr"); |
| 974 | local_irq_enable(); |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 975 | spin_unlock(chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | asm volatile (".rep 8; nop; .endr"); |
| 977 | cond_resched(); |
| 978 | |
| 979 | /* |
| 980 | * We're back. However someone else might have |
| 981 | * decided to go write to the chip if we are in |
| 982 | * a suspended erase state. If so let's wait |
| 983 | * until it's done. |
| 984 | */ |
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 | while (chip->state != newstate) { |
| 987 | DECLARE_WAITQUEUE(wait, current); |
| 988 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 989 | add_wait_queue(&chip->wq, &wait); |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 990 | spin_unlock(chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | schedule(); |
| 992 | remove_wait_queue(&chip->wq, &wait); |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 993 | spin_lock(chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | } |
| 995 | /* Disallow XIP again */ |
| 996 | local_irq_disable(); |
| 997 | |
| 998 | /* Resume the write or erase operation */ |
| 999 | map_write(map, CMD(0xd0), adr); |
| 1000 | map_write(map, CMD(0x70), adr); |
| 1001 | chip->state = oldstate; |
| 1002 | start = xip_currtime(); |
| 1003 | } else if (usec >= 1000000/HZ) { |
| 1004 | /* |
| 1005 | * Try to save on CPU power when waiting delay |
| 1006 | * is at least a system timer tick period. |
| 1007 | * No need to be extremely accurate here. |
| 1008 | */ |
| 1009 | xip_cpu_idle(); |
| 1010 | } |
| 1011 | status = map_read(map, adr); |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1012 | done = xip_elapsed_since(start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | } while (!map_word_andequal(map, status, OK, OK) |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1014 | && done < usec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1016 | return (done >= usec) ? -ETIME : 0; |
| 1017 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | |
| 1019 | /* |
| 1020 | * The INVALIDATE_CACHED_RANGE() macro is normally used in parallel while |
| 1021 | * the flash is actively programming or erasing since we have to poll for |
| 1022 | * the operation to complete anyway. We can't do that in a generic way with |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 1023 | * a XIP setup so do it before the actual flash operation in this case |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1024 | * and stub it out from INVAL_CACHE_AND_WAIT. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | */ |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 1026 | #define XIP_INVAL_CACHED_RANGE(map, from, size) \ |
| 1027 | INVALIDATE_CACHED_RANGE(map, from, size) |
| 1028 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1029 | #define INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, inval_adr, inval_len, p_usec) \ |
| 1030 | xip_wait_for_operation(map, chip, cmd_adr, p_usec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | |
| 1032 | #else |
| 1033 | |
| 1034 | #define xip_disable(map, chip, adr) |
| 1035 | #define xip_enable(map, chip, adr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | #define XIP_INVAL_CACHED_RANGE(x...) |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1037 | #define INVAL_CACHE_AND_WAIT inval_cache_and_wait_for_operation |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1039 | static int inval_cache_and_wait_for_operation( |
| 1040 | struct map_info *map, struct flchip *chip, |
| 1041 | unsigned long cmd_adr, unsigned long inval_adr, int inval_len, |
| 1042 | int *chip_op_time ) |
| 1043 | { |
| 1044 | struct cfi_private *cfi = map->fldrv_priv; |
| 1045 | map_word status, status_OK = CMD(0x80); |
| 1046 | int z, chip_state = chip->state; |
| 1047 | unsigned long timeo; |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 1048 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1049 | spin_unlock(chip->mutex); |
| 1050 | if (inval_len) |
| 1051 | INVALIDATE_CACHED_RANGE(map, inval_adr, inval_len); |
| 1052 | if (*chip_op_time) |
| 1053 | cfi_udelay(*chip_op_time); |
| 1054 | spin_lock(chip->mutex); |
| 1055 | |
| 1056 | timeo = *chip_op_time * 8 * HZ / 1000000; |
| 1057 | if (timeo < HZ/2) |
| 1058 | timeo = HZ/2; |
| 1059 | timeo += jiffies; |
| 1060 | |
| 1061 | z = 0; |
| 1062 | for (;;) { |
| 1063 | if (chip->state != chip_state) { |
| 1064 | /* Someone's suspended the operation: sleep */ |
| 1065 | DECLARE_WAITQUEUE(wait, current); |
| 1066 | |
| 1067 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1068 | add_wait_queue(&chip->wq, &wait); |
| 1069 | spin_unlock(chip->mutex); |
| 1070 | schedule(); |
| 1071 | remove_wait_queue(&chip->wq, &wait); |
| 1072 | timeo = jiffies + (HZ / 2); /* FIXME */ |
| 1073 | spin_lock(chip->mutex); |
| 1074 | continue; |
| 1075 | } |
| 1076 | |
| 1077 | status = map_read(map, cmd_adr); |
| 1078 | if (map_word_andequal(map, status, status_OK, status_OK)) |
| 1079 | break; |
| 1080 | |
| 1081 | /* OK Still waiting */ |
| 1082 | if (time_after(jiffies, timeo)) { |
| 1083 | map_write(map, CMD(0x70), cmd_adr); |
| 1084 | chip->state = FL_STATUS; |
| 1085 | return -ETIME; |
| 1086 | } |
| 1087 | |
| 1088 | /* Latency issues. Drop the lock, wait a while and retry */ |
| 1089 | z++; |
| 1090 | spin_unlock(chip->mutex); |
| 1091 | cfi_udelay(1); |
| 1092 | spin_lock(chip->mutex); |
| 1093 | } |
| 1094 | |
| 1095 | if (!z) { |
| 1096 | if (!--(*chip_op_time)) |
| 1097 | *chip_op_time = 1; |
| 1098 | } else if (z > 1) |
| 1099 | ++(*chip_op_time); |
| 1100 | |
| 1101 | /* Done and happy. */ |
| 1102 | chip->state = FL_STATUS; |
| 1103 | return 0; |
| 1104 | } |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 1105 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | #endif |
| 1107 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1108 | #define WAIT_TIMEOUT(map, chip, adr, udelay) \ |
| 1109 | ({ int __udelay = (udelay); \ |
| 1110 | INVAL_CACHE_AND_WAIT(map, chip, adr, 0, 0, &__udelay); }) |
| 1111 | |
| 1112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | static int do_point_onechip (struct map_info *map, struct flchip *chip, loff_t adr, size_t len) |
| 1114 | { |
| 1115 | unsigned long cmd_addr; |
| 1116 | struct cfi_private *cfi = map->fldrv_priv; |
| 1117 | int ret = 0; |
| 1118 | |
| 1119 | adr += chip->start; |
| 1120 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1121 | /* Ensure cmd read/writes are aligned. */ |
| 1122 | cmd_addr = adr & ~(map_bankwidth(map)-1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | |
| 1124 | spin_lock(chip->mutex); |
| 1125 | |
| 1126 | ret = get_chip(map, chip, cmd_addr, FL_POINT); |
| 1127 | |
| 1128 | if (!ret) { |
| 1129 | if (chip->state != FL_POINT && chip->state != FL_READY) |
| 1130 | map_write(map, CMD(0xff), cmd_addr); |
| 1131 | |
| 1132 | chip->state = FL_POINT; |
| 1133 | chip->ref_point_counter++; |
| 1134 | } |
| 1135 | spin_unlock(chip->mutex); |
| 1136 | |
| 1137 | return ret; |
| 1138 | } |
| 1139 | |
| 1140 | static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf) |
| 1141 | { |
| 1142 | struct map_info *map = mtd->priv; |
| 1143 | struct cfi_private *cfi = map->fldrv_priv; |
| 1144 | unsigned long ofs; |
| 1145 | int chipnum; |
| 1146 | int ret = 0; |
| 1147 | |
| 1148 | if (!map->virt || (from + len > mtd->size)) |
| 1149 | return -EINVAL; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1150 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | *mtdbuf = (void *)map->virt + from; |
| 1152 | *retlen = 0; |
| 1153 | |
| 1154 | /* Now lock the chip(s) to POINT state */ |
| 1155 | |
| 1156 | /* ofs: offset within the first chip that the first read should start */ |
| 1157 | chipnum = (from >> cfi->chipshift); |
| 1158 | ofs = from - (chipnum << cfi->chipshift); |
| 1159 | |
| 1160 | while (len) { |
| 1161 | unsigned long thislen; |
| 1162 | |
| 1163 | if (chipnum >= cfi->numchips) |
| 1164 | break; |
| 1165 | |
| 1166 | if ((len + ofs -1) >> cfi->chipshift) |
| 1167 | thislen = (1<<cfi->chipshift) - ofs; |
| 1168 | else |
| 1169 | thislen = len; |
| 1170 | |
| 1171 | ret = do_point_onechip(map, &cfi->chips[chipnum], ofs, thislen); |
| 1172 | if (ret) |
| 1173 | break; |
| 1174 | |
| 1175 | *retlen += thislen; |
| 1176 | len -= thislen; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | ofs = 0; |
| 1179 | chipnum++; |
| 1180 | } |
| 1181 | return 0; |
| 1182 | } |
| 1183 | |
| 1184 | static void cfi_intelext_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, size_t len) |
| 1185 | { |
| 1186 | struct map_info *map = mtd->priv; |
| 1187 | struct cfi_private *cfi = map->fldrv_priv; |
| 1188 | unsigned long ofs; |
| 1189 | int chipnum; |
| 1190 | |
| 1191 | /* Now unlock the chip(s) POINT state */ |
| 1192 | |
| 1193 | /* ofs: offset within the first chip that the first read should start */ |
| 1194 | chipnum = (from >> cfi->chipshift); |
| 1195 | ofs = from - (chipnum << cfi->chipshift); |
| 1196 | |
| 1197 | while (len) { |
| 1198 | unsigned long thislen; |
| 1199 | struct flchip *chip; |
| 1200 | |
| 1201 | chip = &cfi->chips[chipnum]; |
| 1202 | if (chipnum >= cfi->numchips) |
| 1203 | break; |
| 1204 | |
| 1205 | if ((len + ofs -1) >> cfi->chipshift) |
| 1206 | thislen = (1<<cfi->chipshift) - ofs; |
| 1207 | else |
| 1208 | thislen = len; |
| 1209 | |
| 1210 | spin_lock(chip->mutex); |
| 1211 | if (chip->state == FL_POINT) { |
| 1212 | chip->ref_point_counter--; |
| 1213 | if(chip->ref_point_counter == 0) |
| 1214 | chip->state = FL_READY; |
| 1215 | } else |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1216 | 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] | 1217 | |
| 1218 | put_chip(map, chip, chip->start); |
| 1219 | spin_unlock(chip->mutex); |
| 1220 | |
| 1221 | len -= thislen; |
| 1222 | ofs = 0; |
| 1223 | chipnum++; |
| 1224 | } |
| 1225 | } |
| 1226 | |
| 1227 | static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) |
| 1228 | { |
| 1229 | unsigned long cmd_addr; |
| 1230 | struct cfi_private *cfi = map->fldrv_priv; |
| 1231 | int ret; |
| 1232 | |
| 1233 | adr += chip->start; |
| 1234 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1235 | /* Ensure cmd read/writes are aligned. */ |
| 1236 | cmd_addr = adr & ~(map_bankwidth(map)-1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | |
| 1238 | spin_lock(chip->mutex); |
| 1239 | ret = get_chip(map, chip, cmd_addr, FL_READY); |
| 1240 | if (ret) { |
| 1241 | spin_unlock(chip->mutex); |
| 1242 | return ret; |
| 1243 | } |
| 1244 | |
| 1245 | if (chip->state != FL_POINT && chip->state != FL_READY) { |
| 1246 | map_write(map, CMD(0xff), cmd_addr); |
| 1247 | |
| 1248 | chip->state = FL_READY; |
| 1249 | } |
| 1250 | |
| 1251 | map_copy_from(map, buf, adr, len); |
| 1252 | |
| 1253 | put_chip(map, chip, cmd_addr); |
| 1254 | |
| 1255 | spin_unlock(chip->mutex); |
| 1256 | return 0; |
| 1257 | } |
| 1258 | |
| 1259 | static int cfi_intelext_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) |
| 1260 | { |
| 1261 | struct map_info *map = mtd->priv; |
| 1262 | struct cfi_private *cfi = map->fldrv_priv; |
| 1263 | unsigned long ofs; |
| 1264 | int chipnum; |
| 1265 | int ret = 0; |
| 1266 | |
| 1267 | /* ofs: offset within the first chip that the first read should start */ |
| 1268 | chipnum = (from >> cfi->chipshift); |
| 1269 | ofs = from - (chipnum << cfi->chipshift); |
| 1270 | |
| 1271 | *retlen = 0; |
| 1272 | |
| 1273 | while (len) { |
| 1274 | unsigned long thislen; |
| 1275 | |
| 1276 | if (chipnum >= cfi->numchips) |
| 1277 | break; |
| 1278 | |
| 1279 | if ((len + ofs -1) >> cfi->chipshift) |
| 1280 | thislen = (1<<cfi->chipshift) - ofs; |
| 1281 | else |
| 1282 | thislen = len; |
| 1283 | |
| 1284 | ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); |
| 1285 | if (ret) |
| 1286 | break; |
| 1287 | |
| 1288 | *retlen += thislen; |
| 1289 | len -= thislen; |
| 1290 | buf += thislen; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1291 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | ofs = 0; |
| 1293 | chipnum++; |
| 1294 | } |
| 1295 | return ret; |
| 1296 | } |
| 1297 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | 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] | 1299 | unsigned long adr, map_word datum, int mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | { |
| 1301 | struct cfi_private *cfi = map->fldrv_priv; |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1302 | map_word status, write_cmd; |
| 1303 | int ret=0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | |
| 1305 | adr += chip->start; |
| 1306 | |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1307 | switch (mode) { |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 1308 | case FL_WRITING: |
| 1309 | write_cmd = (cfi->cfiq->P_ID != 0x0200) ? CMD(0x40) : CMD(0x41); |
| 1310 | break; |
| 1311 | case FL_OTP_WRITE: |
| 1312 | write_cmd = CMD(0xc0); |
| 1313 | break; |
| 1314 | default: |
| 1315 | return -EINVAL; |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1316 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | |
| 1318 | spin_lock(chip->mutex); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1319 | ret = get_chip(map, chip, adr, mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | if (ret) { |
| 1321 | spin_unlock(chip->mutex); |
| 1322 | return ret; |
| 1323 | } |
| 1324 | |
| 1325 | XIP_INVAL_CACHED_RANGE(map, adr, map_bankwidth(map)); |
| 1326 | ENABLE_VPP(map); |
| 1327 | xip_disable(map, chip, adr); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1328 | map_write(map, write_cmd, adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | map_write(map, datum, adr); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1330 | chip->state = mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1332 | ret = INVAL_CACHE_AND_WAIT(map, chip, adr, |
| 1333 | adr, map_bankwidth(map), |
| 1334 | &chip->word_write_time); |
| 1335 | if (ret) { |
| 1336 | xip_enable(map, chip, adr); |
| 1337 | printk(KERN_ERR "%s: word write error (status timeout)\n", map->name); |
| 1338 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1341 | /* check for errors */ |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1342 | status = map_read(map, adr); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1343 | if (map_word_bitsset(map, status, CMD(0x1a))) { |
| 1344 | unsigned long chipstatus = MERGESTATUS(status); |
| 1345 | |
| 1346 | /* reset status */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1347 | map_write(map, CMD(0x50), adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | map_write(map, CMD(0x70), adr); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1349 | xip_enable(map, chip, adr); |
| 1350 | |
| 1351 | if (chipstatus & 0x02) { |
| 1352 | ret = -EROFS; |
| 1353 | } else if (chipstatus & 0x08) { |
| 1354 | printk(KERN_ERR "%s: word write error (bad VPP)\n", map->name); |
| 1355 | ret = -EIO; |
| 1356 | } else { |
| 1357 | printk(KERN_ERR "%s: word write error (status 0x%lx)\n", map->name, chipstatus); |
| 1358 | ret = -EINVAL; |
| 1359 | } |
| 1360 | |
| 1361 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | } |
| 1363 | |
| 1364 | xip_enable(map, chip, adr); |
| 1365 | out: put_chip(map, chip, adr); |
| 1366 | spin_unlock(chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | return ret; |
| 1368 | } |
| 1369 | |
| 1370 | |
| 1371 | static int cfi_intelext_write_words (struct mtd_info *mtd, loff_t to , size_t len, size_t *retlen, const u_char *buf) |
| 1372 | { |
| 1373 | struct map_info *map = mtd->priv; |
| 1374 | struct cfi_private *cfi = map->fldrv_priv; |
| 1375 | int ret = 0; |
| 1376 | int chipnum; |
| 1377 | unsigned long ofs; |
| 1378 | |
| 1379 | *retlen = 0; |
| 1380 | if (!len) |
| 1381 | return 0; |
| 1382 | |
| 1383 | chipnum = to >> cfi->chipshift; |
| 1384 | ofs = to - (chipnum << cfi->chipshift); |
| 1385 | |
| 1386 | /* If it's not bus-aligned, do the first byte write */ |
| 1387 | if (ofs & (map_bankwidth(map)-1)) { |
| 1388 | unsigned long bus_ofs = ofs & ~(map_bankwidth(map)-1); |
| 1389 | int gap = ofs - bus_ofs; |
| 1390 | int n; |
| 1391 | map_word datum; |
| 1392 | |
| 1393 | n = min_t(int, len, map_bankwidth(map)-gap); |
| 1394 | datum = map_word_ff(map); |
| 1395 | datum = map_word_load_partial(map, datum, buf, gap, n); |
| 1396 | |
| 1397 | ret = do_write_oneword(map, &cfi->chips[chipnum], |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1398 | bus_ofs, datum, FL_WRITING); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1399 | if (ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | return ret; |
| 1401 | |
| 1402 | len -= n; |
| 1403 | ofs += n; |
| 1404 | buf += n; |
| 1405 | (*retlen) += n; |
| 1406 | |
| 1407 | if (ofs >> cfi->chipshift) { |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1408 | chipnum ++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | ofs = 0; |
| 1410 | if (chipnum == cfi->numchips) |
| 1411 | return 0; |
| 1412 | } |
| 1413 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1414 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | while(len >= map_bankwidth(map)) { |
| 1416 | map_word datum = map_word_load(map, buf); |
| 1417 | |
| 1418 | ret = do_write_oneword(map, &cfi->chips[chipnum], |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1419 | ofs, datum, FL_WRITING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | if (ret) |
| 1421 | return ret; |
| 1422 | |
| 1423 | ofs += map_bankwidth(map); |
| 1424 | buf += map_bankwidth(map); |
| 1425 | (*retlen) += map_bankwidth(map); |
| 1426 | len -= map_bankwidth(map); |
| 1427 | |
| 1428 | if (ofs >> cfi->chipshift) { |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1429 | chipnum ++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | ofs = 0; |
| 1431 | if (chipnum == cfi->numchips) |
| 1432 | return 0; |
| 1433 | } |
| 1434 | } |
| 1435 | |
| 1436 | if (len & (map_bankwidth(map)-1)) { |
| 1437 | map_word datum; |
| 1438 | |
| 1439 | datum = map_word_ff(map); |
| 1440 | datum = map_word_load_partial(map, datum, buf, 0, len); |
| 1441 | |
| 1442 | ret = do_write_oneword(map, &cfi->chips[chipnum], |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1443 | ofs, datum, FL_WRITING); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1444 | if (ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | return ret; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1446 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | (*retlen) += len; |
| 1448 | } |
| 1449 | |
| 1450 | return 0; |
| 1451 | } |
| 1452 | |
| 1453 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1454 | static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1455 | unsigned long adr, const struct kvec **pvec, |
| 1456 | unsigned long *pvec_seek, int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | { |
| 1458 | struct cfi_private *cfi = map->fldrv_priv; |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1459 | map_word status, write_cmd, datum; |
| 1460 | unsigned long cmd_adr; |
| 1461 | int ret, wbufsize, word_gap, words; |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1462 | const struct kvec *vec; |
| 1463 | unsigned long vec_seek; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | |
| 1465 | wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; |
| 1466 | adr += chip->start; |
| 1467 | cmd_adr = adr & ~(wbufsize-1); |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 1468 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | /* Let's determine this according to the interleave only once */ |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 1470 | write_cmd = (cfi->cfiq->P_ID != 0x0200) ? CMD(0xe8) : CMD(0xe9); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | |
| 1472 | spin_lock(chip->mutex); |
| 1473 | ret = get_chip(map, chip, cmd_adr, FL_WRITING); |
| 1474 | if (ret) { |
| 1475 | spin_unlock(chip->mutex); |
| 1476 | return ret; |
| 1477 | } |
| 1478 | |
| 1479 | XIP_INVAL_CACHED_RANGE(map, adr, len); |
| 1480 | ENABLE_VPP(map); |
| 1481 | xip_disable(map, chip, cmd_adr); |
| 1482 | |
David Woodhouse | 151e765 | 2006-05-14 01:51:54 +0100 | [diff] [blame] | 1483 | /* §4.8 of the 28FxxxJ3A datasheet says "Any time SR.4 and/or SR.5 is set |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1484 | [...], the device will not accept any more Write to Buffer commands". |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1485 | So we must check here and reset those bits if they're set. Otherwise |
| 1486 | we're just pissing in the wind */ |
Nicolas Pitre | 6e7a680 | 2006-03-29 23:31:42 +0100 | [diff] [blame] | 1487 | if (chip->state != FL_STATUS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | map_write(map, CMD(0x70), cmd_adr); |
Nicolas Pitre | 6e7a680 | 2006-03-29 23:31:42 +0100 | [diff] [blame] | 1489 | chip->state = FL_STATUS; |
| 1490 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | status = map_read(map, cmd_adr); |
| 1492 | if (map_word_bitsset(map, status, CMD(0x30))) { |
| 1493 | xip_enable(map, chip, cmd_adr); |
| 1494 | printk(KERN_WARNING "SR.4 or SR.5 bits set in buffer write (status %lx). Clearing.\n", status.x[0]); |
| 1495 | xip_disable(map, chip, cmd_adr); |
| 1496 | map_write(map, CMD(0x50), cmd_adr); |
| 1497 | map_write(map, CMD(0x70), cmd_adr); |
| 1498 | } |
| 1499 | |
| 1500 | chip->state = FL_WRITING_TO_BUFFER; |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1501 | map_write(map, write_cmd, cmd_adr); |
| 1502 | ret = WAIT_TIMEOUT(map, chip, cmd_adr, 0); |
| 1503 | if (ret) { |
| 1504 | /* Argh. Not ready for write to buffer */ |
| 1505 | map_word Xstatus = map_read(map, cmd_adr); |
| 1506 | map_write(map, CMD(0x70), cmd_adr); |
| 1507 | chip->state = FL_STATUS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | status = map_read(map, cmd_adr); |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1509 | map_write(map, CMD(0x50), cmd_adr); |
| 1510 | map_write(map, CMD(0x70), cmd_adr); |
| 1511 | xip_enable(map, chip, cmd_adr); |
| 1512 | printk(KERN_ERR "%s: Chip not ready for buffer write. Xstatus = %lx, status = %lx\n", |
| 1513 | map->name, Xstatus.x[0], status.x[0]); |
| 1514 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1515 | } |
| 1516 | |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1517 | /* Figure out the number of words to write */ |
| 1518 | word_gap = (-adr & (map_bankwidth(map)-1)); |
| 1519 | words = (len - word_gap + map_bankwidth(map) - 1) / map_bankwidth(map); |
| 1520 | if (!word_gap) { |
| 1521 | words--; |
| 1522 | } else { |
| 1523 | word_gap = map_bankwidth(map) - word_gap; |
| 1524 | adr -= word_gap; |
| 1525 | datum = map_word_ff(map); |
| 1526 | } |
| 1527 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | /* Write length of data to come */ |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1529 | map_write(map, CMD(words), cmd_adr ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | |
| 1531 | /* Write data */ |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1532 | vec = *pvec; |
| 1533 | vec_seek = *pvec_seek; |
| 1534 | do { |
| 1535 | int n = map_bankwidth(map) - word_gap; |
| 1536 | if (n > vec->iov_len - vec_seek) |
| 1537 | n = vec->iov_len - vec_seek; |
| 1538 | if (n > len) |
| 1539 | n = len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1540 | |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1541 | if (!word_gap && len < map_bankwidth(map)) |
| 1542 | datum = map_word_ff(map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1543 | |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1544 | datum = map_word_load_partial(map, datum, |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1545 | vec->iov_base + vec_seek, |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1546 | word_gap, n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1547 | |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1548 | len -= n; |
| 1549 | word_gap += n; |
| 1550 | if (!len || word_gap == map_bankwidth(map)) { |
| 1551 | map_write(map, datum, adr); |
| 1552 | adr += map_bankwidth(map); |
| 1553 | word_gap = 0; |
| 1554 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1555 | |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1556 | vec_seek += n; |
| 1557 | if (vec_seek == vec->iov_len) { |
| 1558 | vec++; |
| 1559 | vec_seek = 0; |
| 1560 | } |
| 1561 | } while (len); |
| 1562 | *pvec = vec; |
| 1563 | *pvec_seek = vec_seek; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | |
| 1565 | /* GO GO GO */ |
| 1566 | map_write(map, CMD(0xd0), cmd_adr); |
| 1567 | chip->state = FL_WRITING; |
| 1568 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1569 | ret = INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, |
| 1570 | adr, len, |
| 1571 | &chip->buffer_write_time); |
| 1572 | if (ret) { |
| 1573 | map_write(map, CMD(0x70), cmd_adr); |
| 1574 | chip->state = FL_STATUS; |
| 1575 | xip_enable(map, chip, cmd_adr); |
| 1576 | printk(KERN_ERR "%s: buffer write error (status timeout)\n", map->name); |
| 1577 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1578 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1580 | /* check for errors */ |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1581 | status = map_read(map, cmd_adr); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1582 | if (map_word_bitsset(map, status, CMD(0x1a))) { |
| 1583 | unsigned long chipstatus = MERGESTATUS(status); |
| 1584 | |
| 1585 | /* reset status */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1586 | map_write(map, CMD(0x50), cmd_adr); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1587 | map_write(map, CMD(0x70), cmd_adr); |
| 1588 | xip_enable(map, chip, cmd_adr); |
| 1589 | |
| 1590 | if (chipstatus & 0x02) { |
| 1591 | ret = -EROFS; |
| 1592 | } else if (chipstatus & 0x08) { |
| 1593 | printk(KERN_ERR "%s: buffer write error (bad VPP)\n", map->name); |
| 1594 | ret = -EIO; |
| 1595 | } else { |
| 1596 | printk(KERN_ERR "%s: buffer write error (status 0x%lx)\n", map->name, chipstatus); |
| 1597 | ret = -EINVAL; |
| 1598 | } |
| 1599 | |
| 1600 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | } |
| 1602 | |
| 1603 | xip_enable(map, chip, cmd_adr); |
| 1604 | out: put_chip(map, chip, cmd_adr); |
| 1605 | spin_unlock(chip->mutex); |
| 1606 | return ret; |
| 1607 | } |
| 1608 | |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1609 | static int cfi_intelext_writev (struct mtd_info *mtd, const struct kvec *vecs, |
| 1610 | unsigned long count, loff_t to, size_t *retlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | { |
| 1612 | struct map_info *map = mtd->priv; |
| 1613 | struct cfi_private *cfi = map->fldrv_priv; |
| 1614 | int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; |
| 1615 | int ret = 0; |
| 1616 | int chipnum; |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1617 | unsigned long ofs, vec_seek, i; |
| 1618 | size_t len = 0; |
| 1619 | |
| 1620 | for (i = 0; i < count; i++) |
| 1621 | len += vecs[i].iov_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1622 | |
| 1623 | *retlen = 0; |
| 1624 | if (!len) |
| 1625 | return 0; |
| 1626 | |
| 1627 | chipnum = to >> cfi->chipshift; |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1628 | ofs = to - (chipnum << cfi->chipshift); |
| 1629 | vec_seek = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1631 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | /* We must not cross write block boundaries */ |
| 1633 | int size = wbufsize - (ofs & (wbufsize-1)); |
| 1634 | |
| 1635 | if (size > len) |
| 1636 | size = len; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1637 | ret = do_write_buffer(map, &cfi->chips[chipnum], |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1638 | ofs, &vecs, &vec_seek, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | if (ret) |
| 1640 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | |
| 1642 | ofs += size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | (*retlen) += size; |
| 1644 | len -= size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1645 | |
| 1646 | if (ofs >> cfi->chipshift) { |
| 1647 | chipnum ++; |
| 1648 | ofs = 0; |
| 1649 | if (chipnum == cfi->numchips) |
| 1650 | return 0; |
| 1651 | } |
Josh Boyer | df54b52c | 2005-12-06 17:28:19 +0000 | [diff] [blame] | 1652 | |
| 1653 | /* Be nice and reschedule with the chip in a usable state for other |
| 1654 | processes. */ |
| 1655 | cond_resched(); |
| 1656 | |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1657 | } while (len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | return 0; |
| 1660 | } |
| 1661 | |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1662 | static int cfi_intelext_write_buffers (struct mtd_info *mtd, loff_t to, |
| 1663 | size_t len, size_t *retlen, const u_char *buf) |
| 1664 | { |
| 1665 | struct kvec vec; |
| 1666 | |
| 1667 | vec.iov_base = (void *) buf; |
| 1668 | vec.iov_len = len; |
| 1669 | |
| 1670 | return cfi_intelext_writev(mtd, &vec, 1, to, retlen); |
| 1671 | } |
| 1672 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1673 | static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, |
| 1674 | unsigned long adr, int len, void *thunk) |
| 1675 | { |
| 1676 | struct cfi_private *cfi = map->fldrv_priv; |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1677 | map_word status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1678 | int retries = 3; |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1679 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1680 | |
| 1681 | adr += chip->start; |
| 1682 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | retry: |
| 1684 | spin_lock(chip->mutex); |
| 1685 | ret = get_chip(map, chip, adr, FL_ERASING); |
| 1686 | if (ret) { |
| 1687 | spin_unlock(chip->mutex); |
| 1688 | return ret; |
| 1689 | } |
| 1690 | |
| 1691 | XIP_INVAL_CACHED_RANGE(map, adr, len); |
| 1692 | ENABLE_VPP(map); |
| 1693 | xip_disable(map, chip, adr); |
| 1694 | |
| 1695 | /* Clear the status register first */ |
| 1696 | map_write(map, CMD(0x50), adr); |
| 1697 | |
| 1698 | /* Now erase */ |
| 1699 | map_write(map, CMD(0x20), adr); |
| 1700 | map_write(map, CMD(0xD0), adr); |
| 1701 | chip->state = FL_ERASING; |
| 1702 | chip->erase_suspended = 0; |
| 1703 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1704 | ret = INVAL_CACHE_AND_WAIT(map, chip, adr, |
| 1705 | adr, len, |
| 1706 | &chip->erase_time); |
| 1707 | if (ret) { |
| 1708 | map_write(map, CMD(0x70), adr); |
| 1709 | chip->state = FL_STATUS; |
| 1710 | xip_enable(map, chip, adr); |
| 1711 | printk(KERN_ERR "%s: block erase error: (status timeout)\n", map->name); |
| 1712 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | } |
| 1714 | |
| 1715 | /* We've broken this before. It doesn't hurt to be safe */ |
| 1716 | map_write(map, CMD(0x70), adr); |
| 1717 | chip->state = FL_STATUS; |
| 1718 | status = map_read(map, adr); |
| 1719 | |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1720 | /* check for errors */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | if (map_word_bitsset(map, status, CMD(0x3a))) { |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1722 | unsigned long chipstatus = MERGESTATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1723 | |
| 1724 | /* Reset the error bits */ |
| 1725 | map_write(map, CMD(0x50), adr); |
| 1726 | map_write(map, CMD(0x70), adr); |
| 1727 | xip_enable(map, chip, adr); |
| 1728 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | if ((chipstatus & 0x30) == 0x30) { |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1730 | printk(KERN_ERR "%s: block erase error: (bad command sequence, status 0x%lx)\n", map->name, chipstatus); |
| 1731 | ret = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | } else if (chipstatus & 0x02) { |
| 1733 | /* Protection bit set */ |
| 1734 | ret = -EROFS; |
| 1735 | } else if (chipstatus & 0x8) { |
| 1736 | /* Voltage */ |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1737 | printk(KERN_ERR "%s: block erase error: (bad VPP)\n", map->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | ret = -EIO; |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1739 | } else if (chipstatus & 0x20 && retries--) { |
| 1740 | printk(KERN_DEBUG "block erase failed at 0x%08lx: status 0x%lx. Retrying...\n", adr, chipstatus); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1741 | put_chip(map, chip, adr); |
| 1742 | spin_unlock(chip->mutex); |
| 1743 | goto retry; |
| 1744 | } else { |
| 1745 | printk(KERN_ERR "%s: block erase failed at 0x%08lx (status 0x%lx)\n", map->name, adr, chipstatus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1746 | ret = -EIO; |
| 1747 | } |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1748 | |
| 1749 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1750 | } |
| 1751 | |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1752 | xip_enable(map, chip, adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | out: put_chip(map, chip, adr); |
| 1754 | spin_unlock(chip->mutex); |
| 1755 | return ret; |
| 1756 | } |
| 1757 | |
| 1758 | int cfi_intelext_erase_varsize(struct mtd_info *mtd, struct erase_info *instr) |
| 1759 | { |
| 1760 | unsigned long ofs, len; |
| 1761 | int ret; |
| 1762 | |
| 1763 | ofs = instr->addr; |
| 1764 | len = instr->len; |
| 1765 | |
| 1766 | ret = cfi_varsize_frob(mtd, do_erase_oneblock, ofs, len, NULL); |
| 1767 | if (ret) |
| 1768 | return ret; |
| 1769 | |
| 1770 | instr->state = MTD_ERASE_DONE; |
| 1771 | mtd_erase_callback(instr); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1772 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1773 | return 0; |
| 1774 | } |
| 1775 | |
| 1776 | static void cfi_intelext_sync (struct mtd_info *mtd) |
| 1777 | { |
| 1778 | struct map_info *map = mtd->priv; |
| 1779 | struct cfi_private *cfi = map->fldrv_priv; |
| 1780 | int i; |
| 1781 | struct flchip *chip; |
| 1782 | int ret = 0; |
| 1783 | |
| 1784 | for (i=0; !ret && i<cfi->numchips; i++) { |
| 1785 | chip = &cfi->chips[i]; |
| 1786 | |
| 1787 | spin_lock(chip->mutex); |
| 1788 | ret = get_chip(map, chip, chip->start, FL_SYNCING); |
| 1789 | |
| 1790 | if (!ret) { |
| 1791 | chip->oldstate = chip->state; |
| 1792 | chip->state = FL_SYNCING; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1793 | /* No need to wake_up() on this state change - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1794 | * as the whole point is that nobody can do anything |
| 1795 | * with the chip now anyway. |
| 1796 | */ |
| 1797 | } |
| 1798 | spin_unlock(chip->mutex); |
| 1799 | } |
| 1800 | |
| 1801 | /* Unlock the chips again */ |
| 1802 | |
| 1803 | for (i--; i >=0; i--) { |
| 1804 | chip = &cfi->chips[i]; |
| 1805 | |
| 1806 | spin_lock(chip->mutex); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1807 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | if (chip->state == FL_SYNCING) { |
| 1809 | chip->state = chip->oldstate; |
Nicolas Pitre | 09c7933 | 2005-03-16 22:41:09 +0000 | [diff] [blame] | 1810 | chip->oldstate = FL_READY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1811 | wake_up(&chip->wq); |
| 1812 | } |
| 1813 | spin_unlock(chip->mutex); |
| 1814 | } |
| 1815 | } |
| 1816 | |
| 1817 | #ifdef DEBUG_LOCK_BITS |
| 1818 | static int __xipram do_printlockstatus_oneblock(struct map_info *map, |
| 1819 | struct flchip *chip, |
| 1820 | unsigned long adr, |
| 1821 | int len, void *thunk) |
| 1822 | { |
| 1823 | struct cfi_private *cfi = map->fldrv_priv; |
| 1824 | int status, ofs_factor = cfi->interleave * cfi->device_type; |
| 1825 | |
Todd Poynor | c25bb1f | 2005-04-27 21:01:52 +0100 | [diff] [blame] | 1826 | adr += chip->start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1827 | xip_disable(map, chip, adr+(2*ofs_factor)); |
Todd Poynor | c25bb1f | 2005-04-27 21:01:52 +0100 | [diff] [blame] | 1828 | map_write(map, CMD(0x90), adr+(2*ofs_factor)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1829 | chip->state = FL_JEDEC_QUERY; |
| 1830 | status = cfi_read_query(map, adr+(2*ofs_factor)); |
| 1831 | xip_enable(map, chip, 0); |
| 1832 | printk(KERN_DEBUG "block status register for 0x%08lx is %x\n", |
| 1833 | adr, status); |
| 1834 | return 0; |
| 1835 | } |
| 1836 | #endif |
| 1837 | |
| 1838 | #define DO_XXLOCK_ONEBLOCK_LOCK ((void *) 1) |
| 1839 | #define DO_XXLOCK_ONEBLOCK_UNLOCK ((void *) 2) |
| 1840 | |
| 1841 | static int __xipram do_xxlock_oneblock(struct map_info *map, struct flchip *chip, |
| 1842 | unsigned long adr, int len, void *thunk) |
| 1843 | { |
| 1844 | struct cfi_private *cfi = map->fldrv_priv; |
Todd Poynor | 9a6e73e | 2005-03-29 23:06:40 +0100 | [diff] [blame] | 1845 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1846 | int udelay; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1847 | int ret; |
| 1848 | |
| 1849 | adr += chip->start; |
| 1850 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1851 | spin_lock(chip->mutex); |
| 1852 | ret = get_chip(map, chip, adr, FL_LOCKING); |
| 1853 | if (ret) { |
| 1854 | spin_unlock(chip->mutex); |
| 1855 | return ret; |
| 1856 | } |
| 1857 | |
| 1858 | ENABLE_VPP(map); |
| 1859 | xip_disable(map, chip, adr); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1860 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1861 | map_write(map, CMD(0x60), adr); |
| 1862 | if (thunk == DO_XXLOCK_ONEBLOCK_LOCK) { |
| 1863 | map_write(map, CMD(0x01), adr); |
| 1864 | chip->state = FL_LOCKING; |
| 1865 | } else if (thunk == DO_XXLOCK_ONEBLOCK_UNLOCK) { |
| 1866 | map_write(map, CMD(0xD0), adr); |
| 1867 | chip->state = FL_UNLOCKING; |
| 1868 | } else |
| 1869 | BUG(); |
| 1870 | |
Todd Poynor | 9a6e73e | 2005-03-29 23:06:40 +0100 | [diff] [blame] | 1871 | /* |
| 1872 | * If Instant Individual Block Locking supported then no need |
| 1873 | * to delay. |
| 1874 | */ |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1875 | udelay = (!extp || !(extp->FeatureSupport & (1 << 5))) ? 1000000/HZ : 0; |
Todd Poynor | 9a6e73e | 2005-03-29 23:06:40 +0100 | [diff] [blame] | 1876 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1877 | ret = WAIT_TIMEOUT(map, chip, adr, udelay); |
| 1878 | if (ret) { |
| 1879 | map_write(map, CMD(0x70), adr); |
| 1880 | chip->state = FL_STATUS; |
| 1881 | xip_enable(map, chip, adr); |
| 1882 | printk(KERN_ERR "%s: block unlock error: (status timeout)\n", map->name); |
| 1883 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1885 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | xip_enable(map, chip, adr); |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1887 | out: put_chip(map, chip, adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1888 | spin_unlock(chip->mutex); |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1889 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1890 | } |
| 1891 | |
| 1892 | static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, size_t len) |
| 1893 | { |
| 1894 | int ret; |
| 1895 | |
| 1896 | #ifdef DEBUG_LOCK_BITS |
| 1897 | printk(KERN_DEBUG "%s: lock status before, ofs=0x%08llx, len=0x%08X\n", |
| 1898 | __FUNCTION__, ofs, len); |
| 1899 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, |
| 1900 | ofs, len, 0); |
| 1901 | #endif |
| 1902 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1903 | ret = cfi_varsize_frob(mtd, do_xxlock_oneblock, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | ofs, len, DO_XXLOCK_ONEBLOCK_LOCK); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1905 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | #ifdef DEBUG_LOCK_BITS |
| 1907 | printk(KERN_DEBUG "%s: lock status after, ret=%d\n", |
| 1908 | __FUNCTION__, ret); |
| 1909 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, |
| 1910 | ofs, len, 0); |
| 1911 | #endif |
| 1912 | |
| 1913 | return ret; |
| 1914 | } |
| 1915 | |
| 1916 | static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, size_t len) |
| 1917 | { |
| 1918 | int ret; |
| 1919 | |
| 1920 | #ifdef DEBUG_LOCK_BITS |
| 1921 | printk(KERN_DEBUG "%s: lock status before, ofs=0x%08llx, len=0x%08X\n", |
| 1922 | __FUNCTION__, ofs, len); |
| 1923 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, |
| 1924 | ofs, len, 0); |
| 1925 | #endif |
| 1926 | |
| 1927 | ret = cfi_varsize_frob(mtd, do_xxlock_oneblock, |
| 1928 | ofs, len, DO_XXLOCK_ONEBLOCK_UNLOCK); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1929 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1930 | #ifdef DEBUG_LOCK_BITS |
| 1931 | printk(KERN_DEBUG "%s: lock status after, ret=%d\n", |
| 1932 | __FUNCTION__, ret); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1933 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1934 | ofs, len, 0); |
| 1935 | #endif |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1936 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1937 | return ret; |
| 1938 | } |
| 1939 | |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1940 | #ifdef CONFIG_MTD_OTP |
| 1941 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1942 | typedef int (*otp_op_t)(struct map_info *map, struct flchip *chip, |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1943 | u_long data_offset, u_char *buf, u_int size, |
| 1944 | u_long prot_offset, u_int groupno, u_int groupsize); |
| 1945 | |
| 1946 | static int __xipram |
| 1947 | do_otp_read(struct map_info *map, struct flchip *chip, u_long offset, |
| 1948 | u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) |
| 1949 | { |
| 1950 | struct cfi_private *cfi = map->fldrv_priv; |
| 1951 | int ret; |
| 1952 | |
| 1953 | spin_lock(chip->mutex); |
| 1954 | ret = get_chip(map, chip, chip->start, FL_JEDEC_QUERY); |
| 1955 | if (ret) { |
| 1956 | spin_unlock(chip->mutex); |
| 1957 | return ret; |
| 1958 | } |
| 1959 | |
| 1960 | /* let's ensure we're not reading back cached data from array mode */ |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 1961 | INVALIDATE_CACHED_RANGE(map, chip->start + offset, size); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1962 | |
| 1963 | xip_disable(map, chip, chip->start); |
| 1964 | if (chip->state != FL_JEDEC_QUERY) { |
| 1965 | map_write(map, CMD(0x90), chip->start); |
| 1966 | chip->state = FL_JEDEC_QUERY; |
| 1967 | } |
| 1968 | map_copy_from(map, buf, chip->start + offset, size); |
| 1969 | xip_enable(map, chip, chip->start); |
| 1970 | |
| 1971 | /* then ensure we don't keep OTP data in the cache */ |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 1972 | INVALIDATE_CACHED_RANGE(map, chip->start + offset, size); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1973 | |
| 1974 | put_chip(map, chip, chip->start); |
| 1975 | spin_unlock(chip->mutex); |
| 1976 | return 0; |
| 1977 | } |
| 1978 | |
| 1979 | static int |
| 1980 | do_otp_write(struct map_info *map, struct flchip *chip, u_long offset, |
| 1981 | u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) |
| 1982 | { |
| 1983 | int ret; |
| 1984 | |
| 1985 | while (size) { |
| 1986 | unsigned long bus_ofs = offset & ~(map_bankwidth(map)-1); |
| 1987 | int gap = offset - bus_ofs; |
| 1988 | int n = min_t(int, size, map_bankwidth(map)-gap); |
| 1989 | map_word datum = map_word_ff(map); |
| 1990 | |
| 1991 | datum = map_word_load_partial(map, datum, buf, gap, n); |
| 1992 | ret = do_write_oneword(map, chip, bus_ofs, datum, FL_OTP_WRITE); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1993 | if (ret) |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1994 | return ret; |
| 1995 | |
| 1996 | offset += n; |
| 1997 | buf += n; |
| 1998 | size -= n; |
| 1999 | } |
| 2000 | |
| 2001 | return 0; |
| 2002 | } |
| 2003 | |
| 2004 | static int |
| 2005 | do_otp_lock(struct map_info *map, struct flchip *chip, u_long offset, |
| 2006 | u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) |
| 2007 | { |
| 2008 | struct cfi_private *cfi = map->fldrv_priv; |
| 2009 | map_word datum; |
| 2010 | |
| 2011 | /* make sure area matches group boundaries */ |
Nicolas Pitre | 332d71f | 2005-02-17 20:35:04 +0000 | [diff] [blame] | 2012 | if (size != grpsz) |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2013 | return -EXDEV; |
| 2014 | |
| 2015 | datum = map_word_ff(map); |
| 2016 | datum = map_word_clr(map, datum, CMD(1 << grpno)); |
| 2017 | return do_write_oneword(map, chip, prot, datum, FL_OTP_WRITE); |
| 2018 | } |
| 2019 | |
| 2020 | static int cfi_intelext_otp_walk(struct mtd_info *mtd, loff_t from, size_t len, |
| 2021 | size_t *retlen, u_char *buf, |
| 2022 | otp_op_t action, int user_regs) |
| 2023 | { |
| 2024 | struct map_info *map = mtd->priv; |
| 2025 | struct cfi_private *cfi = map->fldrv_priv; |
| 2026 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
| 2027 | struct flchip *chip; |
| 2028 | struct cfi_intelext_otpinfo *otp; |
| 2029 | u_long devsize, reg_prot_offset, data_offset; |
| 2030 | u_int chip_num, chip_step, field, reg_fact_size, reg_user_size; |
| 2031 | u_int groups, groupno, groupsize, reg_fact_groups, reg_user_groups; |
| 2032 | int ret; |
| 2033 | |
| 2034 | *retlen = 0; |
| 2035 | |
| 2036 | /* Check that we actually have some OTP registers */ |
| 2037 | if (!extp || !(extp->FeatureSupport & 64) || !extp->NumProtectionFields) |
| 2038 | return -ENODATA; |
| 2039 | |
| 2040 | /* we need real chips here not virtual ones */ |
| 2041 | devsize = (1 << cfi->cfiq->DevSize) * cfi->interleave; |
| 2042 | chip_step = devsize >> cfi->chipshift; |
Nicolas Pitre | dce2b4d | 2005-04-01 17:36:29 +0100 | [diff] [blame] | 2043 | chip_num = 0; |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2044 | |
Nicolas Pitre | dce2b4d | 2005-04-01 17:36:29 +0100 | [diff] [blame] | 2045 | /* Some chips have OTP located in the _top_ partition only. |
| 2046 | For example: Intel 28F256L18T (T means top-parameter device) */ |
| 2047 | if (cfi->mfr == MANUFACTURER_INTEL) { |
| 2048 | switch (cfi->id) { |
| 2049 | case 0x880b: |
| 2050 | case 0x880c: |
| 2051 | case 0x880d: |
| 2052 | chip_num = chip_step - 1; |
| 2053 | } |
| 2054 | } |
| 2055 | |
| 2056 | for ( ; chip_num < cfi->numchips; chip_num += chip_step) { |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2057 | chip = &cfi->chips[chip_num]; |
| 2058 | otp = (struct cfi_intelext_otpinfo *)&extp->extra[0]; |
| 2059 | |
| 2060 | /* first OTP region */ |
| 2061 | field = 0; |
| 2062 | reg_prot_offset = extp->ProtRegAddr; |
| 2063 | reg_fact_groups = 1; |
| 2064 | reg_fact_size = 1 << extp->FactProtRegSize; |
| 2065 | reg_user_groups = 1; |
| 2066 | reg_user_size = 1 << extp->UserProtRegSize; |
| 2067 | |
| 2068 | while (len > 0) { |
| 2069 | /* flash geometry fixup */ |
| 2070 | data_offset = reg_prot_offset + 1; |
| 2071 | data_offset *= cfi->interleave * cfi->device_type; |
| 2072 | reg_prot_offset *= cfi->interleave * cfi->device_type; |
| 2073 | reg_fact_size *= cfi->interleave; |
| 2074 | reg_user_size *= cfi->interleave; |
| 2075 | |
| 2076 | if (user_regs) { |
| 2077 | groups = reg_user_groups; |
| 2078 | groupsize = reg_user_size; |
| 2079 | /* skip over factory reg area */ |
| 2080 | groupno = reg_fact_groups; |
| 2081 | data_offset += reg_fact_groups * reg_fact_size; |
| 2082 | } else { |
| 2083 | groups = reg_fact_groups; |
| 2084 | groupsize = reg_fact_size; |
| 2085 | groupno = 0; |
| 2086 | } |
| 2087 | |
Nicolas Pitre | 332d71f | 2005-02-17 20:35:04 +0000 | [diff] [blame] | 2088 | while (len > 0 && groups > 0) { |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2089 | if (!action) { |
| 2090 | /* |
| 2091 | * Special case: if action is NULL |
| 2092 | * we fill buf with otp_info records. |
| 2093 | */ |
| 2094 | struct otp_info *otpinfo; |
| 2095 | map_word lockword; |
| 2096 | len -= sizeof(struct otp_info); |
| 2097 | if (len <= 0) |
| 2098 | return -ENOSPC; |
| 2099 | ret = do_otp_read(map, chip, |
| 2100 | reg_prot_offset, |
| 2101 | (u_char *)&lockword, |
| 2102 | map_bankwidth(map), |
| 2103 | 0, 0, 0); |
| 2104 | if (ret) |
| 2105 | return ret; |
| 2106 | otpinfo = (struct otp_info *)buf; |
| 2107 | otpinfo->start = from; |
| 2108 | otpinfo->length = groupsize; |
| 2109 | otpinfo->locked = |
| 2110 | !map_word_bitsset(map, lockword, |
| 2111 | CMD(1 << groupno)); |
| 2112 | from += groupsize; |
| 2113 | buf += sizeof(*otpinfo); |
| 2114 | *retlen += sizeof(*otpinfo); |
| 2115 | } else if (from >= groupsize) { |
| 2116 | from -= groupsize; |
Nicolas Pitre | 332d71f | 2005-02-17 20:35:04 +0000 | [diff] [blame] | 2117 | data_offset += groupsize; |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2118 | } else { |
| 2119 | int size = groupsize; |
| 2120 | data_offset += from; |
| 2121 | size -= from; |
| 2122 | from = 0; |
| 2123 | if (size > len) |
| 2124 | size = len; |
| 2125 | ret = action(map, chip, data_offset, |
| 2126 | buf, size, reg_prot_offset, |
| 2127 | groupno, groupsize); |
| 2128 | if (ret < 0) |
| 2129 | return ret; |
| 2130 | buf += size; |
| 2131 | len -= size; |
| 2132 | *retlen += size; |
Nicolas Pitre | 332d71f | 2005-02-17 20:35:04 +0000 | [diff] [blame] | 2133 | data_offset += size; |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2134 | } |
| 2135 | groupno++; |
| 2136 | groups--; |
| 2137 | } |
| 2138 | |
| 2139 | /* next OTP region */ |
| 2140 | if (++field == extp->NumProtectionFields) |
| 2141 | break; |
| 2142 | reg_prot_offset = otp->ProtRegAddr; |
| 2143 | reg_fact_groups = otp->FactGroups; |
| 2144 | reg_fact_size = 1 << otp->FactProtRegSize; |
| 2145 | reg_user_groups = otp->UserGroups; |
| 2146 | reg_user_size = 1 << otp->UserProtRegSize; |
| 2147 | otp++; |
| 2148 | } |
| 2149 | } |
| 2150 | |
| 2151 | return 0; |
| 2152 | } |
| 2153 | |
| 2154 | static int cfi_intelext_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, |
| 2155 | size_t len, size_t *retlen, |
| 2156 | u_char *buf) |
| 2157 | { |
| 2158 | return cfi_intelext_otp_walk(mtd, from, len, retlen, |
| 2159 | buf, do_otp_read, 0); |
| 2160 | } |
| 2161 | |
| 2162 | static int cfi_intelext_read_user_prot_reg(struct mtd_info *mtd, loff_t from, |
| 2163 | size_t len, size_t *retlen, |
| 2164 | u_char *buf) |
| 2165 | { |
| 2166 | return cfi_intelext_otp_walk(mtd, from, len, retlen, |
| 2167 | buf, do_otp_read, 1); |
| 2168 | } |
| 2169 | |
| 2170 | static int cfi_intelext_write_user_prot_reg(struct mtd_info *mtd, loff_t from, |
| 2171 | size_t len, size_t *retlen, |
| 2172 | u_char *buf) |
| 2173 | { |
| 2174 | return cfi_intelext_otp_walk(mtd, from, len, retlen, |
| 2175 | buf, do_otp_write, 1); |
| 2176 | } |
| 2177 | |
| 2178 | static int cfi_intelext_lock_user_prot_reg(struct mtd_info *mtd, |
| 2179 | loff_t from, size_t len) |
| 2180 | { |
| 2181 | size_t retlen; |
| 2182 | return cfi_intelext_otp_walk(mtd, from, len, &retlen, |
| 2183 | NULL, do_otp_lock, 1); |
| 2184 | } |
| 2185 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2186 | static int cfi_intelext_get_fact_prot_info(struct mtd_info *mtd, |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2187 | struct otp_info *buf, size_t len) |
| 2188 | { |
| 2189 | size_t retlen; |
| 2190 | int ret; |
| 2191 | |
| 2192 | ret = cfi_intelext_otp_walk(mtd, 0, len, &retlen, (u_char *)buf, NULL, 0); |
| 2193 | return ret ? : retlen; |
| 2194 | } |
| 2195 | |
| 2196 | static int cfi_intelext_get_user_prot_info(struct mtd_info *mtd, |
| 2197 | struct otp_info *buf, size_t len) |
| 2198 | { |
| 2199 | size_t retlen; |
| 2200 | int ret; |
| 2201 | |
| 2202 | ret = cfi_intelext_otp_walk(mtd, 0, len, &retlen, (u_char *)buf, NULL, 1); |
| 2203 | return ret ? : retlen; |
| 2204 | } |
| 2205 | |
| 2206 | #endif |
| 2207 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2208 | static int cfi_intelext_suspend(struct mtd_info *mtd) |
| 2209 | { |
| 2210 | struct map_info *map = mtd->priv; |
| 2211 | struct cfi_private *cfi = map->fldrv_priv; |
| 2212 | int i; |
| 2213 | struct flchip *chip; |
| 2214 | int ret = 0; |
| 2215 | |
| 2216 | for (i=0; !ret && i<cfi->numchips; i++) { |
| 2217 | chip = &cfi->chips[i]; |
| 2218 | |
| 2219 | spin_lock(chip->mutex); |
| 2220 | |
| 2221 | switch (chip->state) { |
| 2222 | case FL_READY: |
| 2223 | case FL_STATUS: |
| 2224 | case FL_CFI_QUERY: |
| 2225 | case FL_JEDEC_QUERY: |
| 2226 | if (chip->oldstate == FL_READY) { |
| 2227 | chip->oldstate = chip->state; |
| 2228 | chip->state = FL_PM_SUSPENDED; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2229 | /* No need to wake_up() on this state change - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2230 | * as the whole point is that nobody can do anything |
| 2231 | * with the chip now anyway. |
| 2232 | */ |
| 2233 | } else { |
| 2234 | /* There seems to be an operation pending. We must wait for it. */ |
| 2235 | printk(KERN_NOTICE "Flash device refused suspend due to pending operation (oldstate %d)\n", chip->oldstate); |
| 2236 | ret = -EAGAIN; |
| 2237 | } |
| 2238 | break; |
| 2239 | default: |
| 2240 | /* Should we actually wait? Once upon a time these routines weren't |
| 2241 | allowed to. Or should we return -EAGAIN, because the upper layers |
| 2242 | ought to have already shut down anything which was using the device |
| 2243 | anyway? The latter for now. */ |
| 2244 | printk(KERN_NOTICE "Flash device refused suspend due to active operation (state %d)\n", chip->oldstate); |
| 2245 | ret = -EAGAIN; |
| 2246 | case FL_PM_SUSPENDED: |
| 2247 | break; |
| 2248 | } |
| 2249 | spin_unlock(chip->mutex); |
| 2250 | } |
| 2251 | |
| 2252 | /* Unlock the chips again */ |
| 2253 | |
| 2254 | if (ret) { |
| 2255 | for (i--; i >=0; i--) { |
| 2256 | chip = &cfi->chips[i]; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2257 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2258 | spin_lock(chip->mutex); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2259 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2260 | if (chip->state == FL_PM_SUSPENDED) { |
| 2261 | /* No need to force it into a known state here, |
| 2262 | because we're returning failure, and it didn't |
| 2263 | get power cycled */ |
| 2264 | chip->state = chip->oldstate; |
| 2265 | chip->oldstate = FL_READY; |
| 2266 | wake_up(&chip->wq); |
| 2267 | } |
| 2268 | spin_unlock(chip->mutex); |
| 2269 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2270 | } |
| 2271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2272 | return ret; |
| 2273 | } |
| 2274 | |
| 2275 | static void cfi_intelext_resume(struct mtd_info *mtd) |
| 2276 | { |
| 2277 | struct map_info *map = mtd->priv; |
| 2278 | struct cfi_private *cfi = map->fldrv_priv; |
| 2279 | int i; |
| 2280 | struct flchip *chip; |
| 2281 | |
| 2282 | for (i=0; i<cfi->numchips; i++) { |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2284 | chip = &cfi->chips[i]; |
| 2285 | |
| 2286 | spin_lock(chip->mutex); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2288 | /* Go to known state. Chip may have been power cycled */ |
| 2289 | if (chip->state == FL_PM_SUSPENDED) { |
| 2290 | map_write(map, CMD(0xFF), cfi->chips[i].start); |
| 2291 | chip->oldstate = chip->state = FL_READY; |
| 2292 | wake_up(&chip->wq); |
| 2293 | } |
| 2294 | |
| 2295 | spin_unlock(chip->mutex); |
| 2296 | } |
| 2297 | } |
| 2298 | |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 2299 | static int cfi_intelext_reset(struct mtd_info *mtd) |
| 2300 | { |
| 2301 | struct map_info *map = mtd->priv; |
| 2302 | struct cfi_private *cfi = map->fldrv_priv; |
| 2303 | int i, ret; |
| 2304 | |
| 2305 | for (i=0; i < cfi->numchips; i++) { |
| 2306 | struct flchip *chip = &cfi->chips[i]; |
| 2307 | |
| 2308 | /* force the completion of any ongoing operation |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2309 | and switch to array mode so any bootloader in |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 2310 | flash is accessible for soft reboot. */ |
| 2311 | spin_lock(chip->mutex); |
| 2312 | ret = get_chip(map, chip, chip->start, FL_SYNCING); |
| 2313 | if (!ret) { |
| 2314 | map_write(map, CMD(0xff), chip->start); |
| 2315 | chip->state = FL_READY; |
| 2316 | } |
| 2317 | spin_unlock(chip->mutex); |
| 2318 | } |
| 2319 | |
| 2320 | return 0; |
| 2321 | } |
| 2322 | |
| 2323 | static int cfi_intelext_reboot(struct notifier_block *nb, unsigned long val, |
| 2324 | void *v) |
| 2325 | { |
| 2326 | struct mtd_info *mtd; |
| 2327 | |
| 2328 | mtd = container_of(nb, struct mtd_info, reboot_notifier); |
| 2329 | cfi_intelext_reset(mtd); |
| 2330 | return NOTIFY_DONE; |
| 2331 | } |
| 2332 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2333 | static void cfi_intelext_destroy(struct mtd_info *mtd) |
| 2334 | { |
| 2335 | struct map_info *map = mtd->priv; |
| 2336 | struct cfi_private *cfi = map->fldrv_priv; |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 2337 | cfi_intelext_reset(mtd); |
| 2338 | unregister_reboot_notifier(&mtd->reboot_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2339 | kfree(cfi->cmdset_priv); |
| 2340 | kfree(cfi->cfiq); |
| 2341 | kfree(cfi->chips[0].priv); |
| 2342 | kfree(cfi); |
| 2343 | kfree(mtd->eraseregions); |
| 2344 | } |
| 2345 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2346 | MODULE_LICENSE("GPL"); |
| 2347 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org> et al."); |
| 2348 | MODULE_DESCRIPTION("MTD chip driver for Intel/Sharp flash chips"); |
David Woodhouse | a15bdee | 2006-05-08 22:35:05 +0100 | [diff] [blame] | 2349 | MODULE_ALIAS("cfi_cmdset_0003"); |
| 2350 | MODULE_ALIAS("cfi_cmdset_0200"); |