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 | * |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 7 | * |
Nicolas Pitre | 2f82af0 | 2009-09-14 03:25:28 -0400 | [diff] [blame] | 8 | * 10/10/2000 Nicolas Pitre <nico@fluxnic.net> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * - completely revamped method functions so they are aware and |
| 10 | * independent of the flash geometry (buswidth, interleave, etc.) |
| 11 | * - scalability vs code size is completely set at compile-time |
| 12 | * (see include/linux/mtd/cfi.h for selection) |
| 13 | * - optimized write buffer method |
| 14 | * 02/05/2002 Christopher Hoover <ch@hpl.hp.com>/<ch@murgatroid.com> |
| 15 | * - reworked lock/unlock/erase support for var size flash |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 16 | * 21/03/2007 Rodolfo Giometti <giometti@linux.it> |
| 17 | * - auto unlock sectors on resume for auto locking flash on power up |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 33 | #include <linux/bitmap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/mtd/xip.h> |
| 35 | #include <linux/mtd/map.h> |
| 36 | #include <linux/mtd/mtd.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Hans-Christian Egtvedt | b2ef1a2 | 2009-11-05 15:53:43 +0100 | [diff] [blame] | 45 | /* Intel chips */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #define I82802AB 0x00ad |
| 47 | #define I82802AC 0x00ac |
Daniel Ribeiro | ec2d0d8 | 2009-05-17 08:02:17 -0300 | [diff] [blame] | 48 | #define PF38F4476 0x881c |
Hans-Christian Egtvedt | b2ef1a2 | 2009-11-05 15:53:43 +0100 | [diff] [blame] | 49 | /* STMicroelectronics chips */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #define M50LPW080 0x002F |
Nate Case | deb1a5f | 2008-05-13 14:45:29 -0500 | [diff] [blame] | 51 | #define M50FLW080A 0x0080 |
| 52 | #define M50FLW080B 0x0081 |
Hans-Christian Egtvedt | 8dbaea4 | 2009-11-05 15:53:37 +0100 | [diff] [blame] | 53 | /* Atmel chips */ |
Hans-Christian Egtvedt | d10a39d | 2007-10-30 16:33:07 +0100 | [diff] [blame] | 54 | #define AT49BV640D 0x02de |
Hans-Christian Egtvedt | 8dbaea4 | 2009-11-05 15:53:37 +0100 | [diff] [blame] | 55 | #define AT49BV640DT 0x02db |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
| 57 | 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] | 58 | static int cfi_intelext_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); |
| 59 | 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] | 60 | 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] | 61 | static int cfi_intelext_erase_varsize(struct mtd_info *, struct erase_info *); |
| 62 | static void cfi_intelext_sync (struct mtd_info *); |
Adrian Hunter | 69423d9 | 2008-12-10 13:37:21 +0000 | [diff] [blame] | 63 | static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len); |
| 64 | static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len); |
Richard Cochran | 9938424 | 2010-06-14 18:10:33 +0200 | [diff] [blame] | 65 | static int cfi_intelext_is_locked(struct mtd_info *mtd, loff_t ofs, |
| 66 | uint64_t len); |
Todd Poynor | 8048d2f | 2005-03-31 00:57:33 +0100 | [diff] [blame] | 67 | #ifdef CONFIG_MTD_OTP |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 68 | static int cfi_intelext_read_fact_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *); |
| 69 | static int cfi_intelext_read_user_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *); |
| 70 | static int cfi_intelext_write_user_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *); |
| 71 | static int cfi_intelext_lock_user_prot_reg (struct mtd_info *, loff_t, size_t); |
| 72 | static int cfi_intelext_get_fact_prot_info (struct mtd_info *, |
| 73 | struct otp_info *, size_t); |
| 74 | static int cfi_intelext_get_user_prot_info (struct mtd_info *, |
| 75 | struct otp_info *, size_t); |
Todd Poynor | 8048d2f | 2005-03-31 00:57:33 +0100 | [diff] [blame] | 76 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | static int cfi_intelext_suspend (struct mtd_info *); |
| 78 | static void cfi_intelext_resume (struct mtd_info *); |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 79 | static int cfi_intelext_reboot (struct notifier_block *, unsigned long, void *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
| 81 | static void cfi_intelext_destroy(struct mtd_info *); |
| 82 | |
| 83 | struct mtd_info *cfi_cmdset_0001(struct map_info *, int); |
| 84 | |
| 85 | static struct mtd_info *cfi_intelext_setup (struct mtd_info *); |
| 86 | static int cfi_intelext_partition_fixup(struct mtd_info *, struct cfi_private **); |
| 87 | |
| 88 | static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, |
Jared Hulbert | a98889f | 2008-04-29 23:26:49 -0700 | [diff] [blame] | 89 | size_t *retlen, void **virt, resource_size_t *phys); |
Artem Bityutskiy | 5e4e6e3 | 2012-02-03 13:20:43 +0200 | [diff] [blame] | 90 | static int cfi_intelext_unpoint(struct mtd_info *mtd, loff_t from, size_t len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
Alexey Korolev | 5a37cf1 | 2007-10-22 17:55:20 +0100 | [diff] [blame] | 92 | static int chip_ready (struct map_info *map, struct flchip *chip, unsigned long adr, int mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode); |
| 94 | static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr); |
| 95 | #include "fwh_lock.h" |
| 96 | |
| 97 | |
| 98 | |
| 99 | /* |
| 100 | * *********** SETUP AND PROBE BITS *********** |
| 101 | */ |
| 102 | |
| 103 | static struct mtd_chip_driver cfi_intelext_chipdrv = { |
| 104 | .probe = NULL, /* Not usable directly */ |
| 105 | .destroy = cfi_intelext_destroy, |
| 106 | .name = "cfi_cmdset_0001", |
| 107 | .module = THIS_MODULE |
| 108 | }; |
| 109 | |
| 110 | /* #define DEBUG_LOCK_BITS */ |
| 111 | /* #define DEBUG_CFI_FEATURES */ |
| 112 | |
| 113 | #ifdef DEBUG_CFI_FEATURES |
| 114 | static void cfi_tell_features(struct cfi_pri_intelext *extp) |
| 115 | { |
| 116 | int i; |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 117 | printk(" Extended Query version %c.%c\n", extp->MajorVersion, extp->MinorVersion); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | printk(" Feature/Command Support: %4.4X\n", extp->FeatureSupport); |
| 119 | printk(" - Chip Erase: %s\n", extp->FeatureSupport&1?"supported":"unsupported"); |
| 120 | printk(" - Suspend Erase: %s\n", extp->FeatureSupport&2?"supported":"unsupported"); |
| 121 | printk(" - Suspend Program: %s\n", extp->FeatureSupport&4?"supported":"unsupported"); |
| 122 | printk(" - Legacy Lock/Unlock: %s\n", extp->FeatureSupport&8?"supported":"unsupported"); |
| 123 | printk(" - Queued Erase: %s\n", extp->FeatureSupport&16?"supported":"unsupported"); |
| 124 | printk(" - Instant block lock: %s\n", extp->FeatureSupport&32?"supported":"unsupported"); |
| 125 | printk(" - Protection Bits: %s\n", extp->FeatureSupport&64?"supported":"unsupported"); |
| 126 | printk(" - Page-mode read: %s\n", extp->FeatureSupport&128?"supported":"unsupported"); |
| 127 | printk(" - Synchronous read: %s\n", extp->FeatureSupport&256?"supported":"unsupported"); |
| 128 | printk(" - Simultaneous operations: %s\n", extp->FeatureSupport&512?"supported":"unsupported"); |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 129 | printk(" - Extended Flash Array: %s\n", extp->FeatureSupport&1024?"supported":"unsupported"); |
| 130 | for (i=11; i<32; i++) { |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 131 | if (extp->FeatureSupport & (1<<i)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | printk(" - Unknown Bit %X: supported\n", i); |
| 133 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | printk(" Supported functions after Suspend: %2.2X\n", extp->SuspendCmdSupport); |
| 136 | printk(" - Program after Erase Suspend: %s\n", extp->SuspendCmdSupport&1?"supported":"unsupported"); |
| 137 | for (i=1; i<8; i++) { |
| 138 | if (extp->SuspendCmdSupport & (1<<i)) |
| 139 | printk(" - Unknown Bit %X: supported\n", i); |
| 140 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 141 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | printk(" Block Status Register Mask: %4.4X\n", extp->BlkStatusRegMask); |
| 143 | printk(" - Lock Bit Active: %s\n", extp->BlkStatusRegMask&1?"yes":"no"); |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 144 | printk(" - Lock-Down Bit Active: %s\n", extp->BlkStatusRegMask&2?"yes":"no"); |
| 145 | for (i=2; i<3; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | if (extp->BlkStatusRegMask & (1<<i)) |
| 147 | printk(" - Unknown Bit %X Active: yes\n",i); |
| 148 | } |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 149 | printk(" - EFA Lock Bit: %s\n", extp->BlkStatusRegMask&16?"yes":"no"); |
| 150 | printk(" - EFA Lock-Down Bit: %s\n", extp->BlkStatusRegMask&32?"yes":"no"); |
| 151 | for (i=6; i<16; i++) { |
| 152 | if (extp->BlkStatusRegMask & (1<<i)) |
| 153 | printk(" - Unknown Bit %X Active: yes\n",i); |
| 154 | } |
| 155 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 156 | printk(" Vcc Logic Supply Optimum Program/Erase Voltage: %d.%d V\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | extp->VccOptimal >> 4, extp->VccOptimal & 0xf); |
| 158 | if (extp->VppOptimal) |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 159 | printk(" Vpp Programming Supply Optimum Program/Erase Voltage: %d.%d V\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | extp->VppOptimal >> 4, extp->VppOptimal & 0xf); |
| 161 | } |
| 162 | #endif |
| 163 | |
Hans-Christian Egtvedt | d10a39d | 2007-10-30 16:33:07 +0100 | [diff] [blame] | 164 | /* Atmel chips don't use the same PRI format as Intel chips */ |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 165 | static void fixup_convert_atmel_pri(struct mtd_info *mtd) |
Hans-Christian Egtvedt | d10a39d | 2007-10-30 16:33:07 +0100 | [diff] [blame] | 166 | { |
| 167 | struct map_info *map = mtd->priv; |
| 168 | struct cfi_private *cfi = map->fldrv_priv; |
| 169 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
| 170 | struct cfi_pri_atmel atmel_pri; |
| 171 | uint32_t features = 0; |
| 172 | |
| 173 | /* Reverse byteswapping */ |
| 174 | extp->FeatureSupport = cpu_to_le32(extp->FeatureSupport); |
| 175 | extp->BlkStatusRegMask = cpu_to_le16(extp->BlkStatusRegMask); |
| 176 | extp->ProtRegAddr = cpu_to_le16(extp->ProtRegAddr); |
| 177 | |
| 178 | memcpy(&atmel_pri, extp, sizeof(atmel_pri)); |
| 179 | memset((char *)extp + 5, 0, sizeof(*extp) - 5); |
| 180 | |
| 181 | printk(KERN_ERR "atmel Features: %02x\n", atmel_pri.Features); |
| 182 | |
| 183 | if (atmel_pri.Features & 0x01) /* chip erase supported */ |
| 184 | features |= (1<<0); |
| 185 | if (atmel_pri.Features & 0x02) /* erase suspend supported */ |
| 186 | features |= (1<<1); |
| 187 | if (atmel_pri.Features & 0x04) /* program suspend supported */ |
| 188 | features |= (1<<2); |
| 189 | if (atmel_pri.Features & 0x08) /* simultaneous operations supported */ |
| 190 | features |= (1<<9); |
| 191 | if (atmel_pri.Features & 0x20) /* page mode read supported */ |
| 192 | features |= (1<<7); |
| 193 | if (atmel_pri.Features & 0x40) /* queued erase supported */ |
| 194 | features |= (1<<4); |
| 195 | if (atmel_pri.Features & 0x80) /* Protection bits supported */ |
| 196 | features |= (1<<6); |
| 197 | |
| 198 | extp->FeatureSupport = features; |
| 199 | |
| 200 | /* burst write mode not supported */ |
| 201 | cfi->cfiq->BufWriteTimeoutTyp = 0; |
| 202 | cfi->cfiq->BufWriteTimeoutMax = 0; |
| 203 | } |
| 204 | |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 205 | static void fixup_at49bv640dx_lock(struct mtd_info *mtd) |
Hans-Christian Egtvedt | 8dbaea4 | 2009-11-05 15:53:37 +0100 | [diff] [blame] | 206 | { |
| 207 | struct map_info *map = mtd->priv; |
| 208 | struct cfi_private *cfi = map->fldrv_priv; |
| 209 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; |
| 210 | |
| 211 | cfip->FeatureSupport |= (1 << 5); |
| 212 | mtd->flags |= MTD_POWERUP_LOCK; |
| 213 | } |
| 214 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 216 | /* Some Intel Strata Flash prior to FPO revision C has bugs in this area */ |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 217 | static void fixup_intel_strataflash(struct mtd_info *mtd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | { |
| 219 | struct map_info *map = mtd->priv; |
| 220 | struct cfi_private *cfi = map->fldrv_priv; |
Alexander Belyakov | 91949d6 | 2008-05-04 14:32:58 +0400 | [diff] [blame] | 221 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
| 223 | printk(KERN_WARNING "cfi_cmdset_0001: Suspend " |
| 224 | "erase on write disabled.\n"); |
| 225 | extp->SuspendCmdSupport &= ~1; |
| 226 | } |
| 227 | #endif |
| 228 | |
| 229 | #ifdef CMDSET0001_DISABLE_WRITE_SUSPEND |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 230 | static void fixup_no_write_suspend(struct mtd_info *mtd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | { |
| 232 | struct map_info *map = mtd->priv; |
| 233 | struct cfi_private *cfi = map->fldrv_priv; |
| 234 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; |
| 235 | |
| 236 | if (cfip && (cfip->FeatureSupport&4)) { |
| 237 | cfip->FeatureSupport &= ~4; |
| 238 | printk(KERN_WARNING "cfi_cmdset_0001: write suspend disabled\n"); |
| 239 | } |
| 240 | } |
| 241 | #endif |
| 242 | |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 243 | static void fixup_st_m28w320ct(struct mtd_info *mtd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | { |
| 245 | struct map_info *map = mtd->priv; |
| 246 | struct cfi_private *cfi = map->fldrv_priv; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | cfi->cfiq->BufWriteTimeoutTyp = 0; /* Not supported */ |
| 249 | cfi->cfiq->BufWriteTimeoutMax = 0; /* Not supported */ |
| 250 | } |
| 251 | |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 252 | static void fixup_st_m28w320cb(struct mtd_info *mtd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | { |
| 254 | struct map_info *map = mtd->priv; |
| 255 | struct cfi_private *cfi = map->fldrv_priv; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 256 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | /* Note this is done after the region info is endian swapped */ |
| 258 | cfi->cfiq->EraseRegionInfo[1] = |
| 259 | (cfi->cfiq->EraseRegionInfo[1] & 0xffff0000) | 0x3e; |
| 260 | }; |
| 261 | |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 262 | static void fixup_use_point(struct mtd_info *mtd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | { |
| 264 | struct map_info *map = mtd->priv; |
Artem Bityutskiy | 3c3c10b | 2012-01-30 14:58:32 +0200 | [diff] [blame] | 265 | if (!mtd->_point && map_is_linear(map)) { |
| 266 | mtd->_point = cfi_intelext_point; |
| 267 | mtd->_unpoint = cfi_intelext_unpoint; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | } |
| 269 | } |
| 270 | |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 271 | static void fixup_use_write_buffers(struct mtd_info *mtd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | { |
| 273 | struct map_info *map = mtd->priv; |
| 274 | struct cfi_private *cfi = map->fldrv_priv; |
| 275 | if (cfi->cfiq->BufWriteTimeoutTyp) { |
| 276 | printk(KERN_INFO "Using buffer write method\n" ); |
Artem Bityutskiy | 3c3c10b | 2012-01-30 14:58:32 +0200 | [diff] [blame] | 277 | mtd->_write = cfi_intelext_write_buffers; |
| 278 | mtd->_writev = cfi_intelext_writev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | } |
| 280 | } |
| 281 | |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 282 | /* |
| 283 | * Some chips power-up with all sectors locked by default. |
| 284 | */ |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 285 | static void fixup_unlock_powerup_lock(struct mtd_info *mtd) |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 286 | { |
Justin Treon | e619a75 | 2008-01-30 10:25:49 -0800 | [diff] [blame] | 287 | struct map_info *map = mtd->priv; |
| 288 | struct cfi_private *cfi = map->fldrv_priv; |
| 289 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; |
| 290 | |
| 291 | if (cfip->FeatureSupport&32) { |
| 292 | printk(KERN_INFO "Using auto-unlock on power-up/resume\n" ); |
| 293 | mtd->flags |= MTD_POWERUP_LOCK; |
| 294 | } |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 295 | } |
| 296 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | static struct cfi_fixup cfi_fixup_table[] = { |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 298 | { CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri }, |
| 299 | { CFI_MFR_ATMEL, AT49BV640D, fixup_at49bv640dx_lock }, |
| 300 | { CFI_MFR_ATMEL, AT49BV640DT, fixup_at49bv640dx_lock }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 302 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_intel_strataflash }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | #endif |
| 304 | #ifdef CMDSET0001_DISABLE_WRITE_SUSPEND |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 305 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_no_write_suspend }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | #endif |
| 307 | #if !FORCE_WORD_WRITE |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 308 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | #endif |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 310 | { CFI_MFR_ST, 0x00ba, /* M28W320CT */ fixup_st_m28w320ct }, |
| 311 | { CFI_MFR_ST, 0x00bb, /* M28W320CB */ fixup_st_m28w320cb }, |
| 312 | { CFI_MFR_INTEL, CFI_ID_ANY, fixup_unlock_powerup_lock }, |
| 313 | { 0, 0, NULL } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | }; |
| 315 | |
| 316 | static struct cfi_fixup jedec_fixup_table[] = { |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 317 | { CFI_MFR_INTEL, I82802AB, fixup_use_fwh_lock }, |
| 318 | { CFI_MFR_INTEL, I82802AC, fixup_use_fwh_lock }, |
| 319 | { CFI_MFR_ST, M50LPW080, fixup_use_fwh_lock }, |
| 320 | { CFI_MFR_ST, M50FLW080A, fixup_use_fwh_lock }, |
| 321 | { CFI_MFR_ST, M50FLW080B, fixup_use_fwh_lock }, |
| 322 | { 0, 0, NULL } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | }; |
| 324 | static struct cfi_fixup fixup_table[] = { |
| 325 | /* The CFI vendor ids and the JEDEC vendor IDs appear |
| 326 | * to be common. It is like the devices id's are as |
| 327 | * well. This table is to pick all cases where |
| 328 | * we know that is the case. |
| 329 | */ |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 330 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_point }, |
| 331 | { 0, 0, NULL } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | }; |
| 333 | |
Daniel Ribeiro | ec2d0d8 | 2009-05-17 08:02:17 -0300 | [diff] [blame] | 334 | static void cfi_fixup_major_minor(struct cfi_private *cfi, |
| 335 | struct cfi_pri_intelext *extp) |
| 336 | { |
Hans-Christian Egtvedt | b2ef1a2 | 2009-11-05 15:53:43 +0100 | [diff] [blame] | 337 | if (cfi->mfr == CFI_MFR_INTEL && |
Daniel Ribeiro | ec2d0d8 | 2009-05-17 08:02:17 -0300 | [diff] [blame] | 338 | cfi->id == PF38F4476 && extp->MinorVersion == '3') |
| 339 | extp->MinorVersion = '1'; |
| 340 | } |
| 341 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | static inline struct cfi_pri_intelext * |
| 343 | read_pri_intelext(struct map_info *map, __u16 adr) |
| 344 | { |
Daniel Ribeiro | ec2d0d8 | 2009-05-17 08:02:17 -0300 | [diff] [blame] | 345 | struct cfi_private *cfi = map->fldrv_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | struct cfi_pri_intelext *extp; |
Daniel Ribeiro | e1b158a | 2009-05-17 08:02:08 -0300 | [diff] [blame] | 347 | unsigned int extra_size = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | unsigned int extp_size = sizeof(*extp); |
| 349 | |
| 350 | again: |
| 351 | extp = (struct cfi_pri_intelext *)cfi_read_pri(map, adr, extp_size, "Intel/Sharp"); |
| 352 | if (!extp) |
| 353 | return NULL; |
| 354 | |
Daniel Ribeiro | ec2d0d8 | 2009-05-17 08:02:17 -0300 | [diff] [blame] | 355 | cfi_fixup_major_minor(cfi, extp); |
| 356 | |
Todd Poynor | d88f977 | 2005-07-20 22:01:17 +0100 | [diff] [blame] | 357 | if (extp->MajorVersion != '1' || |
Alexey Korolev | b1c9c9b | 2007-11-23 09:31:56 +0000 | [diff] [blame] | 358 | (extp->MinorVersion < '0' || extp->MinorVersion > '5')) { |
Todd Poynor | d88f977 | 2005-07-20 22:01:17 +0100 | [diff] [blame] | 359 | printk(KERN_ERR " Unknown Intel/Sharp Extended Query " |
| 360 | "version %c.%c.\n", extp->MajorVersion, |
| 361 | extp->MinorVersion); |
| 362 | kfree(extp); |
| 363 | return NULL; |
| 364 | } |
| 365 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | /* Do some byteswapping if necessary */ |
| 367 | extp->FeatureSupport = le32_to_cpu(extp->FeatureSupport); |
| 368 | extp->BlkStatusRegMask = le16_to_cpu(extp->BlkStatusRegMask); |
| 369 | extp->ProtRegAddr = le16_to_cpu(extp->ProtRegAddr); |
| 370 | |
Daniel Ribeiro | e1b158a | 2009-05-17 08:02:08 -0300 | [diff] [blame] | 371 | if (extp->MinorVersion >= '0') { |
| 372 | extra_size = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | |
| 374 | /* Protection Register info */ |
Nicolas Pitre | 72b56a2 | 2005-02-05 02:06:19 +0000 | [diff] [blame] | 375 | extra_size += (extp->NumProtectionFields - 1) * |
| 376 | sizeof(struct cfi_intelext_otpinfo); |
Daniel Ribeiro | e1b158a | 2009-05-17 08:02:08 -0300 | [diff] [blame] | 377 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | |
Daniel Ribeiro | e1b158a | 2009-05-17 08:02:08 -0300 | [diff] [blame] | 379 | if (extp->MinorVersion >= '1') { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | /* Burst Read info */ |
Nicolas Pitre | 6f6ed05 | 2005-10-25 21:28:43 +0100 | [diff] [blame] | 381 | extra_size += 2; |
| 382 | if (extp_size < sizeof(*extp) + extra_size) |
| 383 | goto need_more; |
Daniel Ribeiro | e1b158a | 2009-05-17 08:02:08 -0300 | [diff] [blame] | 384 | extra_size += extp->extra[extra_size - 1]; |
| 385 | } |
| 386 | |
| 387 | if (extp->MinorVersion >= '3') { |
| 388 | int nb_parts, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | |
| 390 | /* Number of hardware-partitions */ |
| 391 | extra_size += 1; |
| 392 | if (extp_size < sizeof(*extp) + extra_size) |
| 393 | goto need_more; |
| 394 | nb_parts = extp->extra[extra_size - 1]; |
| 395 | |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 396 | /* skip the sizeof(partregion) field in CFI 1.4 */ |
| 397 | if (extp->MinorVersion >= '4') |
| 398 | extra_size += 2; |
| 399 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | for (i = 0; i < nb_parts; i++) { |
| 401 | struct cfi_intelext_regioninfo *rinfo; |
| 402 | rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[extra_size]; |
| 403 | extra_size += sizeof(*rinfo); |
| 404 | if (extp_size < sizeof(*extp) + extra_size) |
| 405 | goto need_more; |
| 406 | rinfo->NumIdentPartitions=le16_to_cpu(rinfo->NumIdentPartitions); |
| 407 | extra_size += (rinfo->NumBlockTypes - 1) |
| 408 | * sizeof(struct cfi_intelext_blockinfo); |
| 409 | } |
| 410 | |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 411 | if (extp->MinorVersion >= '4') |
| 412 | extra_size += sizeof(struct cfi_intelext_programming_regioninfo); |
| 413 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | if (extp_size < sizeof(*extp) + extra_size) { |
| 415 | need_more: |
| 416 | extp_size = sizeof(*extp) + extra_size; |
| 417 | kfree(extp); |
| 418 | if (extp_size > 4096) { |
| 419 | printk(KERN_ERR |
| 420 | "%s: cfi_pri_intelext is too fat\n", |
Harvey Harrison | cb53b3b | 2008-04-18 13:44:19 -0700 | [diff] [blame] | 421 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | return NULL; |
| 423 | } |
| 424 | goto again; |
| 425 | } |
| 426 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 427 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | return extp; |
| 429 | } |
| 430 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | struct mtd_info *cfi_cmdset_0001(struct map_info *map, int primary) |
| 432 | { |
| 433 | struct cfi_private *cfi = map->fldrv_priv; |
| 434 | struct mtd_info *mtd; |
| 435 | int i; |
| 436 | |
Burman Yan | 95b93a0 | 2006-11-15 21:10:29 +0200 | [diff] [blame] | 437 | mtd = kzalloc(sizeof(*mtd), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | if (!mtd) { |
| 439 | printk(KERN_ERR "Failed to allocate memory for MTD device\n"); |
| 440 | return NULL; |
| 441 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | mtd->priv = map; |
| 443 | mtd->type = MTD_NORFLASH; |
| 444 | |
| 445 | /* Fill in the default mtd operations */ |
Artem Bityutskiy | 3c3c10b | 2012-01-30 14:58:32 +0200 | [diff] [blame] | 446 | mtd->_erase = cfi_intelext_erase_varsize; |
| 447 | mtd->_read = cfi_intelext_read; |
| 448 | mtd->_write = cfi_intelext_write_words; |
| 449 | mtd->_sync = cfi_intelext_sync; |
| 450 | mtd->_lock = cfi_intelext_lock; |
| 451 | mtd->_unlock = cfi_intelext_unlock; |
| 452 | mtd->_is_locked = cfi_intelext_is_locked; |
| 453 | mtd->_suspend = cfi_intelext_suspend; |
| 454 | mtd->_resume = cfi_intelext_resume; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | mtd->flags = MTD_CAP_NORFLASH; |
| 456 | mtd->name = map->name; |
Artem B. Bityutskiy | 17ffc7b | 2006-06-22 18:15:48 +0400 | [diff] [blame] | 457 | mtd->writesize = 1; |
Anatolij Gustschin | 13ce77f | 2011-02-10 16:01:46 +0100 | [diff] [blame] | 458 | mtd->writebufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 459 | |
| 460 | mtd->reboot_notifier.notifier_call = cfi_intelext_reboot; |
| 461 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | if (cfi->cfi_mode == CFI_MODE_CFI) { |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 463 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | * It's a real CFI chip, not one for which the probe |
| 465 | * routine faked a CFI structure. So we read the feature |
| 466 | * table from it. |
| 467 | */ |
| 468 | __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR; |
| 469 | struct cfi_pri_intelext *extp; |
| 470 | |
| 471 | extp = read_pri_intelext(map, adr); |
| 472 | if (!extp) { |
| 473 | kfree(mtd); |
| 474 | return NULL; |
| 475 | } |
| 476 | |
| 477 | /* Install our own private info structure */ |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 478 | cfi->cmdset_priv = extp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | |
| 480 | cfi_fixup(mtd, cfi_fixup_table); |
| 481 | |
| 482 | #ifdef DEBUG_CFI_FEATURES |
| 483 | /* Tell the user about it in lots of lovely detail */ |
| 484 | cfi_tell_features(extp); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 485 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | |
| 487 | if(extp->SuspendCmdSupport & 1) { |
| 488 | printk(KERN_NOTICE "cfi_cmdset_0001: Erase suspend on write enabled\n"); |
| 489 | } |
| 490 | } |
| 491 | else if (cfi->cfi_mode == CFI_MODE_JEDEC) { |
| 492 | /* Apply jedec specific fixups */ |
| 493 | cfi_fixup(mtd, jedec_fixup_table); |
| 494 | } |
| 495 | /* Apply generic fixups */ |
| 496 | cfi_fixup(mtd, fixup_table); |
| 497 | |
| 498 | for (i=0; i< cfi->numchips; i++) { |
David Woodhouse | 2a5bd59 | 2007-02-09 14:39:10 +0000 | [diff] [blame] | 499 | if (cfi->cfiq->WordWriteTimeoutTyp) |
| 500 | cfi->chips[i].word_write_time = |
| 501 | 1<<cfi->cfiq->WordWriteTimeoutTyp; |
| 502 | else |
| 503 | cfi->chips[i].word_write_time = 50000; |
| 504 | |
| 505 | if (cfi->cfiq->BufWriteTimeoutTyp) |
| 506 | cfi->chips[i].buffer_write_time = |
| 507 | 1<<cfi->cfiq->BufWriteTimeoutTyp; |
| 508 | /* No default; if it isn't specified, we won't use it */ |
| 509 | |
| 510 | if (cfi->cfiq->BlockEraseTimeoutTyp) |
| 511 | cfi->chips[i].erase_time = |
| 512 | 1000<<cfi->cfiq->BlockEraseTimeoutTyp; |
| 513 | else |
| 514 | cfi->chips[i].erase_time = 2000000; |
| 515 | |
Anders Grafström | e93cafe | 2008-08-05 18:37:41 +0200 | [diff] [blame] | 516 | if (cfi->cfiq->WordWriteTimeoutTyp && |
| 517 | cfi->cfiq->WordWriteTimeoutMax) |
| 518 | cfi->chips[i].word_write_time_max = |
| 519 | 1<<(cfi->cfiq->WordWriteTimeoutTyp + |
| 520 | cfi->cfiq->WordWriteTimeoutMax); |
| 521 | else |
| 522 | cfi->chips[i].word_write_time_max = 50000 * 8; |
| 523 | |
| 524 | if (cfi->cfiq->BufWriteTimeoutTyp && |
| 525 | cfi->cfiq->BufWriteTimeoutMax) |
| 526 | cfi->chips[i].buffer_write_time_max = |
| 527 | 1<<(cfi->cfiq->BufWriteTimeoutTyp + |
| 528 | cfi->cfiq->BufWriteTimeoutMax); |
| 529 | |
| 530 | if (cfi->cfiq->BlockEraseTimeoutTyp && |
| 531 | cfi->cfiq->BlockEraseTimeoutMax) |
| 532 | cfi->chips[i].erase_time_max = |
| 533 | 1000<<(cfi->cfiq->BlockEraseTimeoutTyp + |
| 534 | cfi->cfiq->BlockEraseTimeoutMax); |
| 535 | else |
| 536 | cfi->chips[i].erase_time_max = 2000000 * 8; |
| 537 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | cfi->chips[i].ref_point_counter = 0; |
Simon Vogl | c314b6f | 2006-02-24 13:04:09 -0800 | [diff] [blame] | 539 | init_waitqueue_head(&(cfi->chips[i].wq)); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 540 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | |
| 542 | map->fldrv = &cfi_intelext_chipdrv; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 543 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | return cfi_intelext_setup(mtd); |
| 545 | } |
David Woodhouse | a15bdee | 2006-05-08 22:35:05 +0100 | [diff] [blame] | 546 | struct mtd_info *cfi_cmdset_0003(struct map_info *map, int primary) __attribute__((alias("cfi_cmdset_0001"))); |
| 547 | struct mtd_info *cfi_cmdset_0200(struct map_info *map, int primary) __attribute__((alias("cfi_cmdset_0001"))); |
| 548 | EXPORT_SYMBOL_GPL(cfi_cmdset_0001); |
| 549 | EXPORT_SYMBOL_GPL(cfi_cmdset_0003); |
| 550 | EXPORT_SYMBOL_GPL(cfi_cmdset_0200); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | |
| 552 | static struct mtd_info *cfi_intelext_setup(struct mtd_info *mtd) |
| 553 | { |
| 554 | struct map_info *map = mtd->priv; |
| 555 | struct cfi_private *cfi = map->fldrv_priv; |
| 556 | unsigned long offset = 0; |
| 557 | int i,j; |
| 558 | unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave; |
| 559 | |
| 560 | //printk(KERN_DEBUG "number of CFI chips: %d\n", cfi->numchips); |
| 561 | |
| 562 | mtd->size = devsize * cfi->numchips; |
| 563 | |
| 564 | mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 565 | mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | * mtd->numeraseregions, GFP_KERNEL); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 567 | if (!mtd->eraseregions) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | printk(KERN_ERR "Failed to allocate memory for MTD erase region info\n"); |
| 569 | goto setup_err; |
| 570 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 571 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | for (i=0; i<cfi->cfiq->NumEraseRegions; i++) { |
| 573 | unsigned long ernum, ersize; |
| 574 | ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave; |
| 575 | ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1; |
| 576 | |
| 577 | if (mtd->erasesize < ersize) { |
| 578 | mtd->erasesize = ersize; |
| 579 | } |
| 580 | for (j=0; j<cfi->numchips; j++) { |
| 581 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset; |
| 582 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize; |
| 583 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum; |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 584 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].lockmap = kmalloc(ernum / 8 + 1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | } |
| 586 | offset += (ersize * ernum); |
| 587 | } |
| 588 | |
| 589 | if (offset != devsize) { |
| 590 | /* Argh */ |
| 591 | printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize); |
| 592 | goto setup_err; |
| 593 | } |
| 594 | |
| 595 | for (i=0; i<mtd->numeraseregions;i++){ |
Adrian Hunter | 69423d9 | 2008-12-10 13:37:21 +0000 | [diff] [blame] | 596 | printk(KERN_DEBUG "erase region %d: offset=0x%llx,size=0x%x,blocks=%d\n", |
| 597 | i,(unsigned long long)mtd->eraseregions[i].offset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | mtd->eraseregions[i].erasesize, |
| 599 | mtd->eraseregions[i].numblocks); |
| 600 | } |
| 601 | |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 602 | #ifdef CONFIG_MTD_OTP |
Artem Bityutskiy | 3c3c10b | 2012-01-30 14:58:32 +0200 | [diff] [blame] | 603 | mtd->_read_fact_prot_reg = cfi_intelext_read_fact_prot_reg; |
| 604 | mtd->_read_user_prot_reg = cfi_intelext_read_user_prot_reg; |
| 605 | mtd->_write_user_prot_reg = cfi_intelext_write_user_prot_reg; |
| 606 | mtd->_lock_user_prot_reg = cfi_intelext_lock_user_prot_reg; |
| 607 | mtd->_get_fact_prot_info = cfi_intelext_get_fact_prot_info; |
| 608 | mtd->_get_user_prot_info = cfi_intelext_get_user_prot_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | #endif |
| 610 | |
| 611 | /* This function has the potential to distort the reality |
| 612 | a bit and therefore should be called last. */ |
| 613 | if (cfi_intelext_partition_fixup(mtd, &cfi) != 0) |
| 614 | goto setup_err; |
| 615 | |
| 616 | __module_get(THIS_MODULE); |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 617 | register_reboot_notifier(&mtd->reboot_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | return mtd; |
| 619 | |
| 620 | setup_err: |
Jiri Slaby | 17fabf1 | 2010-01-10 10:01:19 +0100 | [diff] [blame] | 621 | kfree(mtd->eraseregions); |
| 622 | kfree(mtd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | kfree(cfi->cmdset_priv); |
| 624 | return NULL; |
| 625 | } |
| 626 | |
| 627 | static int cfi_intelext_partition_fixup(struct mtd_info *mtd, |
| 628 | struct cfi_private **pcfi) |
| 629 | { |
| 630 | struct map_info *map = mtd->priv; |
| 631 | struct cfi_private *cfi = *pcfi; |
| 632 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
| 633 | |
| 634 | /* |
Jesper Juhl | 8f1a866 | 2007-07-05 02:18:34 +0200 | [diff] [blame] | 635 | * Probing of multi-partition flash chips. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | * |
| 637 | * To support multiple partitions when available, we simply arrange |
| 638 | * for each of them to have their own flchip structure even if they |
| 639 | * are on the same physical chip. This means completely recreating |
| 640 | * a new cfi_private structure right here which is a blatent code |
| 641 | * layering violation, but this is still the least intrusive |
| 642 | * arrangement at this point. This can be rearranged in the future |
| 643 | * if someone feels motivated enough. --nico |
| 644 | */ |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 645 | if (extp && extp->MajorVersion == '1' && extp->MinorVersion >= '3' |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | && extp->FeatureSupport & (1 << 9)) { |
| 647 | struct cfi_private *newcfi; |
| 648 | struct flchip *chip; |
| 649 | struct flchip_shared *shared; |
| 650 | int offs, numregions, numparts, partshift, numvirtchips, i, j; |
| 651 | |
| 652 | /* Protection Register info */ |
Nicolas Pitre | 72b56a2 | 2005-02-05 02:06:19 +0000 | [diff] [blame] | 653 | offs = (extp->NumProtectionFields - 1) * |
| 654 | sizeof(struct cfi_intelext_otpinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | |
| 656 | /* Burst Read info */ |
Nicolas Pitre | 6f6ed05 | 2005-10-25 21:28:43 +0100 | [diff] [blame] | 657 | offs += extp->extra[offs+1]+2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | |
| 659 | /* Number of partition regions */ |
| 660 | numregions = extp->extra[offs]; |
| 661 | offs += 1; |
| 662 | |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 663 | /* skip the sizeof(partregion) field in CFI 1.4 */ |
| 664 | if (extp->MinorVersion >= '4') |
| 665 | offs += 2; |
| 666 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | /* Number of hardware partitions */ |
| 668 | numparts = 0; |
| 669 | for (i = 0; i < numregions; i++) { |
| 670 | struct cfi_intelext_regioninfo *rinfo; |
| 671 | rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[offs]; |
| 672 | numparts += rinfo->NumIdentPartitions; |
| 673 | offs += sizeof(*rinfo) |
| 674 | + (rinfo->NumBlockTypes - 1) * |
| 675 | sizeof(struct cfi_intelext_blockinfo); |
| 676 | } |
| 677 | |
Thomas Kunze | fe22466 | 2008-04-23 01:40:52 +0200 | [diff] [blame] | 678 | if (!numparts) |
| 679 | numparts = 1; |
| 680 | |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 681 | /* Programming Region info */ |
| 682 | if (extp->MinorVersion >= '4') { |
| 683 | struct cfi_intelext_programming_regioninfo *prinfo; |
| 684 | prinfo = (struct cfi_intelext_programming_regioninfo *)&extp->extra[offs]; |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 685 | mtd->writesize = cfi->interleave << prinfo->ProgRegShift; |
Joern Engel | 5fa4339 | 2006-05-22 23:18:29 +0200 | [diff] [blame] | 686 | mtd->flags &= ~MTD_BIT_WRITEABLE; |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 687 | 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] | 688 | map->name, mtd->writesize, |
Artem Bityutskiy | d416085 | 2007-01-30 10:45:55 +0200 | [diff] [blame] | 689 | cfi->interleave * prinfo->ControlValid, |
| 690 | cfi->interleave * prinfo->ControlInvalid); |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 691 | } |
| 692 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | /* |
| 694 | * All functions below currently rely on all chips having |
| 695 | * the same geometry so we'll just assume that all hardware |
| 696 | * partitions are of the same size too. |
| 697 | */ |
| 698 | partshift = cfi->chipshift - __ffs(numparts); |
| 699 | |
| 700 | if ((1 << partshift) < mtd->erasesize) { |
| 701 | printk( KERN_ERR |
| 702 | "%s: bad number of hw partitions (%d)\n", |
Harvey Harrison | cb53b3b | 2008-04-18 13:44:19 -0700 | [diff] [blame] | 703 | __func__, numparts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | return -EINVAL; |
| 705 | } |
| 706 | |
| 707 | numvirtchips = cfi->numchips * numparts; |
| 708 | newcfi = kmalloc(sizeof(struct cfi_private) + numvirtchips * sizeof(struct flchip), GFP_KERNEL); |
| 709 | if (!newcfi) |
| 710 | return -ENOMEM; |
| 711 | shared = kmalloc(sizeof(struct flchip_shared) * cfi->numchips, GFP_KERNEL); |
| 712 | if (!shared) { |
| 713 | kfree(newcfi); |
| 714 | return -ENOMEM; |
| 715 | } |
| 716 | memcpy(newcfi, cfi, sizeof(struct cfi_private)); |
| 717 | newcfi->numchips = numvirtchips; |
| 718 | newcfi->chipshift = partshift; |
| 719 | |
| 720 | chip = &newcfi->chips[0]; |
| 721 | for (i = 0; i < cfi->numchips; i++) { |
| 722 | shared[i].writing = shared[i].erasing = NULL; |
Stefani Seibold | 8ae6641 | 2010-08-05 09:19:26 +0200 | [diff] [blame] | 723 | mutex_init(&shared[i].lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | for (j = 0; j < numparts; j++) { |
| 725 | *chip = cfi->chips[i]; |
| 726 | chip->start += j << partshift; |
| 727 | chip->priv = &shared[i]; |
| 728 | /* those should be reset too since |
| 729 | they create memory references. */ |
| 730 | init_waitqueue_head(&chip->wq); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 731 | mutex_init(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | chip++; |
| 733 | } |
| 734 | } |
| 735 | |
| 736 | printk(KERN_DEBUG "%s: %d set(s) of %d interleaved chips " |
| 737 | "--> %d partitions of %d KiB\n", |
| 738 | map->name, cfi->numchips, cfi->interleave, |
| 739 | newcfi->numchips, 1<<(newcfi->chipshift-10)); |
| 740 | |
| 741 | map->fldrv_priv = newcfi; |
| 742 | *pcfi = newcfi; |
| 743 | kfree(cfi); |
| 744 | } |
| 745 | |
| 746 | return 0; |
| 747 | } |
| 748 | |
| 749 | /* |
| 750 | * *********** CHIP ACCESS FUNCTIONS *********** |
| 751 | */ |
Alexey Korolev | 5a37cf1 | 2007-10-22 17:55:20 +0100 | [diff] [blame] | 752 | static int chip_ready (struct map_info *map, struct flchip *chip, unsigned long adr, int mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | { |
| 754 | DECLARE_WAITQUEUE(wait, current); |
| 755 | struct cfi_private *cfi = map->fldrv_priv; |
| 756 | map_word status, status_OK = CMD(0x80), status_PWS = CMD(0x01); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; |
Alexey Korolev | 5a37cf1 | 2007-10-22 17:55:20 +0100 | [diff] [blame] | 758 | unsigned long timeo = jiffies + HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | |
Alexander Belyakov | 3afe7eb | 2008-09-25 17:53:24 +0400 | [diff] [blame] | 760 | /* Prevent setting state FL_SYNCING for chip in suspended state. */ |
| 761 | if (mode == FL_SYNCING && chip->oldstate != FL_READY) |
| 762 | goto sleep; |
| 763 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | switch (chip->state) { |
| 765 | |
| 766 | case FL_STATUS: |
| 767 | for (;;) { |
| 768 | status = map_read(map, adr); |
| 769 | if (map_word_andequal(map, status, status_OK, status_OK)) |
| 770 | break; |
| 771 | |
| 772 | /* At this point we're fine with write operations |
| 773 | in other partitions as they don't conflict. */ |
| 774 | if (chip->priv && map_word_andequal(map, status, status_PWS, status_PWS)) |
| 775 | break; |
| 776 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 777 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | cfi_udelay(1); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 779 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | /* Someone else might have been playing with it. */ |
Alexey Korolev | 5a37cf1 | 2007-10-22 17:55:20 +0100 | [diff] [blame] | 781 | return -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | } |
Alexey Korolev | fb6d080 | 2008-04-04 14:30:01 -0700 | [diff] [blame] | 783 | /* Fall through */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | case FL_READY: |
| 785 | case FL_CFI_QUERY: |
| 786 | case FL_JEDEC_QUERY: |
| 787 | return 0; |
| 788 | |
| 789 | case FL_ERASING: |
| 790 | if (!cfip || |
| 791 | !(cfip->FeatureSupport & 2) || |
| 792 | !(mode == FL_READY || mode == FL_POINT || |
| 793 | (mode == FL_WRITING && (cfip->SuspendCmdSupport & 1)))) |
| 794 | goto sleep; |
| 795 | |
| 796 | |
| 797 | /* Erase suspend */ |
| 798 | map_write(map, CMD(0xB0), adr); |
| 799 | |
| 800 | /* If the flash has finished erasing, then 'erase suspend' |
| 801 | * appears to make some (28F320) flash devices switch to |
| 802 | * 'read' mode. Make sure that we switch to 'read status' |
| 803 | * mode so we get the right data. --rmk |
| 804 | */ |
| 805 | map_write(map, CMD(0x70), adr); |
| 806 | chip->oldstate = FL_ERASING; |
| 807 | chip->state = FL_ERASE_SUSPENDING; |
| 808 | chip->erase_suspended = 1; |
| 809 | for (;;) { |
| 810 | status = map_read(map, adr); |
| 811 | if (map_word_andequal(map, status, status_OK, status_OK)) |
| 812 | break; |
| 813 | |
| 814 | if (time_after(jiffies, timeo)) { |
Tadashi Abe | 100f234 | 2011-05-19 15:58:15 +0900 | [diff] [blame] | 815 | /* Urgh. Resume and pretend we weren't here. |
| 816 | * Make sure we're in 'read status' mode if it had finished */ |
| 817 | put_chip(map, chip, adr); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 818 | printk(KERN_ERR "%s: Chip not ready after erase " |
| 819 | "suspended: status = 0x%lx\n", map->name, status.x[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | return -EIO; |
| 821 | } |
| 822 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 823 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | cfi_udelay(1); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 825 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | /* Nobody will touch it while it's in state FL_ERASE_SUSPENDING. |
| 827 | So we can just loop here. */ |
| 828 | } |
| 829 | chip->state = FL_STATUS; |
| 830 | return 0; |
| 831 | |
| 832 | case FL_XIP_WHILE_ERASING: |
| 833 | if (mode != FL_READY && mode != FL_POINT && |
| 834 | (mode != FL_WRITING || !cfip || !(cfip->SuspendCmdSupport&1))) |
| 835 | goto sleep; |
| 836 | chip->oldstate = chip->state; |
| 837 | chip->state = FL_READY; |
| 838 | return 0; |
| 839 | |
Alexey Korolev | fb6d080 | 2008-04-04 14:30:01 -0700 | [diff] [blame] | 840 | case FL_SHUTDOWN: |
| 841 | /* The machine is rebooting now,so no one can get chip anymore */ |
| 842 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | case FL_POINT: |
| 844 | /* Only if there's no operation suspended... */ |
| 845 | if (mode == FL_READY && chip->oldstate == FL_READY) |
| 846 | return 0; |
Alexey Korolev | fb6d080 | 2008-04-04 14:30:01 -0700 | [diff] [blame] | 847 | /* Fall through */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | default: |
| 849 | sleep: |
| 850 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 851 | add_wait_queue(&chip->wq, &wait); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 852 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | schedule(); |
| 854 | remove_wait_queue(&chip->wq, &wait); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 855 | mutex_lock(&chip->mutex); |
Alexey Korolev | 5a37cf1 | 2007-10-22 17:55:20 +0100 | [diff] [blame] | 856 | return -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | } |
| 858 | } |
| 859 | |
Alexey Korolev | 5a37cf1 | 2007-10-22 17:55:20 +0100 | [diff] [blame] | 860 | static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode) |
| 861 | { |
| 862 | int ret; |
Alexander Belyakov | 6c24e41 | 2007-11-07 11:58:07 +0300 | [diff] [blame] | 863 | DECLARE_WAITQUEUE(wait, current); |
Alexey Korolev | 5a37cf1 | 2007-10-22 17:55:20 +0100 | [diff] [blame] | 864 | |
| 865 | retry: |
Alexander Belyakov | 3afe7eb | 2008-09-25 17:53:24 +0400 | [diff] [blame] | 866 | if (chip->priv && |
| 867 | (mode == FL_WRITING || mode == FL_ERASING || mode == FL_OTP_WRITE |
| 868 | || mode == FL_SHUTDOWN) && chip->state != FL_SYNCING) { |
Alexey Korolev | 5a37cf1 | 2007-10-22 17:55:20 +0100 | [diff] [blame] | 869 | /* |
| 870 | * OK. We have possibility for contention on the write/erase |
| 871 | * operations which are global to the real chip and not per |
| 872 | * partition. So let's fight it over in the partition which |
| 873 | * currently has authority on the operation. |
| 874 | * |
| 875 | * The rules are as follows: |
| 876 | * |
| 877 | * - any write operation must own shared->writing. |
| 878 | * |
| 879 | * - any erase operation must own _both_ shared->writing and |
| 880 | * shared->erasing. |
| 881 | * |
| 882 | * - contention arbitration is handled in the owner's context. |
| 883 | * |
| 884 | * The 'shared' struct can be read and/or written only when |
| 885 | * its lock is taken. |
| 886 | */ |
| 887 | struct flchip_shared *shared = chip->priv; |
| 888 | struct flchip *contender; |
Stefani Seibold | 8ae6641 | 2010-08-05 09:19:26 +0200 | [diff] [blame] | 889 | mutex_lock(&shared->lock); |
Alexey Korolev | 5a37cf1 | 2007-10-22 17:55:20 +0100 | [diff] [blame] | 890 | contender = shared->writing; |
| 891 | if (contender && contender != chip) { |
| 892 | /* |
| 893 | * The engine to perform desired operation on this |
| 894 | * partition is already in use by someone else. |
| 895 | * Let's fight over it in the context of the chip |
| 896 | * currently using it. If it is possible to suspend, |
| 897 | * that other partition will do just that, otherwise |
| 898 | * it'll happily send us to sleep. In any case, when |
| 899 | * get_chip returns success we're clear to go ahead. |
| 900 | */ |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 901 | ret = mutex_trylock(&contender->mutex); |
Stefani Seibold | 8ae6641 | 2010-08-05 09:19:26 +0200 | [diff] [blame] | 902 | mutex_unlock(&shared->lock); |
Alexey Korolev | 5a37cf1 | 2007-10-22 17:55:20 +0100 | [diff] [blame] | 903 | if (!ret) |
| 904 | goto retry; |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 905 | mutex_unlock(&chip->mutex); |
Alexey Korolev | 5a37cf1 | 2007-10-22 17:55:20 +0100 | [diff] [blame] | 906 | ret = chip_ready(map, contender, contender->start, mode); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 907 | mutex_lock(&chip->mutex); |
Alexey Korolev | 5a37cf1 | 2007-10-22 17:55:20 +0100 | [diff] [blame] | 908 | |
| 909 | if (ret == -EAGAIN) { |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 910 | mutex_unlock(&contender->mutex); |
Alexey Korolev | 5a37cf1 | 2007-10-22 17:55:20 +0100 | [diff] [blame] | 911 | goto retry; |
| 912 | } |
| 913 | if (ret) { |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 914 | mutex_unlock(&contender->mutex); |
Alexey Korolev | 5a37cf1 | 2007-10-22 17:55:20 +0100 | [diff] [blame] | 915 | return ret; |
| 916 | } |
Stefani Seibold | 8ae6641 | 2010-08-05 09:19:26 +0200 | [diff] [blame] | 917 | mutex_lock(&shared->lock); |
Alexander Belyakov | 3afe7eb | 2008-09-25 17:53:24 +0400 | [diff] [blame] | 918 | |
| 919 | /* We should not own chip if it is already |
| 920 | * in FL_SYNCING state. Put contender and retry. */ |
| 921 | if (chip->state == FL_SYNCING) { |
| 922 | put_chip(map, contender, contender->start); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 923 | mutex_unlock(&contender->mutex); |
Alexander Belyakov | 3afe7eb | 2008-09-25 17:53:24 +0400 | [diff] [blame] | 924 | goto retry; |
| 925 | } |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 926 | mutex_unlock(&contender->mutex); |
Alexey Korolev | 5a37cf1 | 2007-10-22 17:55:20 +0100 | [diff] [blame] | 927 | } |
| 928 | |
Alexander Belyakov | 6c24e41 | 2007-11-07 11:58:07 +0300 | [diff] [blame] | 929 | /* Check if we already have suspended erase |
| 930 | * on this chip. Sleep. */ |
| 931 | if (mode == FL_ERASING && shared->erasing |
| 932 | && shared->erasing->oldstate == FL_ERASING) { |
Stefani Seibold | 8ae6641 | 2010-08-05 09:19:26 +0200 | [diff] [blame] | 933 | mutex_unlock(&shared->lock); |
Alexander Belyakov | 6c24e41 | 2007-11-07 11:58:07 +0300 | [diff] [blame] | 934 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 935 | add_wait_queue(&chip->wq, &wait); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 936 | mutex_unlock(&chip->mutex); |
Alexander Belyakov | 6c24e41 | 2007-11-07 11:58:07 +0300 | [diff] [blame] | 937 | schedule(); |
| 938 | remove_wait_queue(&chip->wq, &wait); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 939 | mutex_lock(&chip->mutex); |
Alexander Belyakov | 6c24e41 | 2007-11-07 11:58:07 +0300 | [diff] [blame] | 940 | goto retry; |
| 941 | } |
| 942 | |
Alexey Korolev | 5a37cf1 | 2007-10-22 17:55:20 +0100 | [diff] [blame] | 943 | /* We now own it */ |
| 944 | shared->writing = chip; |
| 945 | if (mode == FL_ERASING) |
| 946 | shared->erasing = chip; |
Stefani Seibold | 8ae6641 | 2010-08-05 09:19:26 +0200 | [diff] [blame] | 947 | mutex_unlock(&shared->lock); |
Alexey Korolev | 5a37cf1 | 2007-10-22 17:55:20 +0100 | [diff] [blame] | 948 | } |
| 949 | ret = chip_ready(map, chip, adr, mode); |
| 950 | if (ret == -EAGAIN) |
| 951 | goto retry; |
| 952 | |
| 953 | return ret; |
| 954 | } |
| 955 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr) |
| 957 | { |
| 958 | struct cfi_private *cfi = map->fldrv_priv; |
| 959 | |
| 960 | if (chip->priv) { |
| 961 | struct flchip_shared *shared = chip->priv; |
Stefani Seibold | 8ae6641 | 2010-08-05 09:19:26 +0200 | [diff] [blame] | 962 | mutex_lock(&shared->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | if (shared->writing == chip && chip->oldstate == FL_READY) { |
| 964 | /* We own the ability to write, but we're done */ |
| 965 | shared->writing = shared->erasing; |
| 966 | if (shared->writing && shared->writing != chip) { |
| 967 | /* give back ownership to who we loaned it from */ |
| 968 | struct flchip *loaner = shared->writing; |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 969 | mutex_lock(&loaner->mutex); |
Stefani Seibold | 8ae6641 | 2010-08-05 09:19:26 +0200 | [diff] [blame] | 970 | mutex_unlock(&shared->lock); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 971 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | put_chip(map, loaner, loaner->start); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 973 | mutex_lock(&chip->mutex); |
| 974 | mutex_unlock(&loaner->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | wake_up(&chip->wq); |
| 976 | return; |
| 977 | } |
| 978 | shared->erasing = NULL; |
| 979 | shared->writing = NULL; |
| 980 | } else if (shared->erasing == chip && shared->writing != chip) { |
| 981 | /* |
| 982 | * We own the ability to erase without the ability |
| 983 | * to write, which means the erase was suspended |
| 984 | * and some other partition is currently writing. |
| 985 | * Don't let the switch below mess things up since |
| 986 | * we don't have ownership to resume anything. |
| 987 | */ |
Stefani Seibold | 8ae6641 | 2010-08-05 09:19:26 +0200 | [diff] [blame] | 988 | mutex_unlock(&shared->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | wake_up(&chip->wq); |
| 990 | return; |
| 991 | } |
Stefani Seibold | 8ae6641 | 2010-08-05 09:19:26 +0200 | [diff] [blame] | 992 | mutex_unlock(&shared->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | } |
| 994 | |
| 995 | switch(chip->oldstate) { |
| 996 | case FL_ERASING: |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 997 | /* What if one interleaved chip has finished and the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | other hasn't? The old code would leave the finished |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 999 | one in READY mode. That's bad, and caused -EROFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | errors to be returned from do_erase_oneblock because |
| 1001 | that's the only bit it checked for at the time. |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1002 | As the state machine appears to explicitly allow |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | sending the 0x70 (Read Status) command to an erasing |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1004 | chip and expecting it to be ignored, that's what we |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | do. */ |
| 1006 | map_write(map, CMD(0xd0), adr); |
| 1007 | map_write(map, CMD(0x70), adr); |
| 1008 | chip->oldstate = FL_READY; |
| 1009 | chip->state = FL_ERASING; |
| 1010 | break; |
| 1011 | |
| 1012 | case FL_XIP_WHILE_ERASING: |
| 1013 | chip->state = chip->oldstate; |
| 1014 | chip->oldstate = FL_READY; |
| 1015 | break; |
| 1016 | |
| 1017 | case FL_READY: |
| 1018 | case FL_STATUS: |
| 1019 | case FL_JEDEC_QUERY: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | break; |
| 1021 | default: |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1022 | 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] | 1023 | } |
| 1024 | wake_up(&chip->wq); |
| 1025 | } |
| 1026 | |
| 1027 | #ifdef CONFIG_MTD_XIP |
| 1028 | |
| 1029 | /* |
| 1030 | * No interrupt what so ever can be serviced while the flash isn't in array |
| 1031 | * mode. This is ensured by the xip_disable() and xip_enable() functions |
| 1032 | * enclosing any code path where the flash is known not to be in array mode. |
| 1033 | * And within a XIP disabled code path, only functions marked with __xipram |
| 1034 | * may be called and nothing else (it's a good thing to inspect generated |
| 1035 | * assembly to make sure inline functions were actually inlined and that gcc |
| 1036 | * didn't emit calls to its own support functions). Also configuring MTD CFI |
| 1037 | * support to a single buswidth and a single interleave is also recommended. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | */ |
| 1039 | |
| 1040 | static void xip_disable(struct map_info *map, struct flchip *chip, |
| 1041 | unsigned long adr) |
| 1042 | { |
| 1043 | /* TODO: chips with no XIP use should ignore and return */ |
| 1044 | (void) map_read(map, adr); /* ensure mmu mapping is up to date */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | local_irq_disable(); |
| 1046 | } |
| 1047 | |
| 1048 | static void __xipram xip_enable(struct map_info *map, struct flchip *chip, |
| 1049 | unsigned long adr) |
| 1050 | { |
| 1051 | struct cfi_private *cfi = map->fldrv_priv; |
| 1052 | if (chip->state != FL_POINT && chip->state != FL_READY) { |
| 1053 | map_write(map, CMD(0xff), adr); |
| 1054 | chip->state = FL_READY; |
| 1055 | } |
| 1056 | (void) map_read(map, adr); |
Thomas Gleixner | 97f927a | 2005-07-07 16:50:16 +0200 | [diff] [blame] | 1057 | xip_iprefetch(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | local_irq_enable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | } |
| 1060 | |
| 1061 | /* |
| 1062 | * When a delay is required for the flash operation to complete, the |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1063 | * xip_wait_for_operation() function is polling for both the given timeout |
| 1064 | * and pending (but still masked) hardware interrupts. Whenever there is an |
| 1065 | * interrupt pending then the flash erase or write operation is suspended, |
| 1066 | * array mode restored and interrupts unmasked. Task scheduling might also |
| 1067 | * happen at that point. The CPU eventually returns from the interrupt or |
| 1068 | * the call to schedule() and the suspended flash operation is resumed for |
| 1069 | * the remaining of the delay period. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | * |
| 1071 | * Warning: this function _will_ fool interrupt latency tracing tools. |
| 1072 | */ |
| 1073 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1074 | static int __xipram xip_wait_for_operation( |
| 1075 | struct map_info *map, struct flchip *chip, |
Anders Grafström | e93cafe | 2008-08-05 18:37:41 +0200 | [diff] [blame] | 1076 | unsigned long adr, unsigned int chip_op_time_max) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | { |
| 1078 | struct cfi_private *cfi = map->fldrv_priv; |
| 1079 | struct cfi_pri_intelext *cfip = cfi->cmdset_priv; |
| 1080 | map_word status, OK = CMD(0x80); |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1081 | unsigned long usec, suspended, start, done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | flstate_t oldstate, newstate; |
| 1083 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1084 | start = xip_currtime(); |
Anders Grafström | e93cafe | 2008-08-05 18:37:41 +0200 | [diff] [blame] | 1085 | usec = chip_op_time_max; |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1086 | if (usec == 0) |
| 1087 | usec = 500000; |
| 1088 | done = 0; |
| 1089 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | do { |
| 1091 | cpu_relax(); |
| 1092 | if (xip_irqpending() && cfip && |
| 1093 | ((chip->state == FL_ERASING && (cfip->FeatureSupport&2)) || |
| 1094 | (chip->state == FL_WRITING && (cfip->FeatureSupport&4))) && |
| 1095 | (cfi_interleave_is_1(cfi) || chip->oldstate == FL_READY)) { |
| 1096 | /* |
| 1097 | * Let's suspend the erase or write operation when |
| 1098 | * supported. Note that we currently don't try to |
| 1099 | * suspend interleaved chips if there is already |
| 1100 | * another operation suspended (imagine what happens |
| 1101 | * when one chip was already done with the current |
| 1102 | * operation while another chip suspended it, then |
| 1103 | * we resume the whole thing at once). Yes, it |
| 1104 | * can happen! |
| 1105 | */ |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1106 | usec -= done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | map_write(map, CMD(0xb0), adr); |
| 1108 | map_write(map, CMD(0x70), adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | suspended = xip_currtime(); |
| 1110 | do { |
| 1111 | if (xip_elapsed_since(suspended) > 100000) { |
| 1112 | /* |
| 1113 | * The chip doesn't want to suspend |
| 1114 | * after waiting for 100 msecs. |
| 1115 | * This is a critical error but there |
| 1116 | * is not much we can do here. |
| 1117 | */ |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1118 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | } |
| 1120 | status = map_read(map, adr); |
| 1121 | } while (!map_word_andequal(map, status, OK, OK)); |
| 1122 | |
| 1123 | /* Suspend succeeded */ |
| 1124 | oldstate = chip->state; |
| 1125 | if (oldstate == FL_ERASING) { |
| 1126 | if (!map_word_bitsset(map, status, CMD(0x40))) |
| 1127 | break; |
| 1128 | newstate = FL_XIP_WHILE_ERASING; |
| 1129 | chip->erase_suspended = 1; |
| 1130 | } else { |
| 1131 | if (!map_word_bitsset(map, status, CMD(0x04))) |
| 1132 | break; |
| 1133 | newstate = FL_XIP_WHILE_WRITING; |
| 1134 | chip->write_suspended = 1; |
| 1135 | } |
| 1136 | chip->state = newstate; |
| 1137 | map_write(map, CMD(0xff), adr); |
| 1138 | (void) map_read(map, adr); |
Paulius Zaleckas | ca5c23c | 2008-02-27 01:42:39 +0200 | [diff] [blame] | 1139 | xip_iprefetch(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | local_irq_enable(); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1141 | mutex_unlock(&chip->mutex); |
Paulius Zaleckas | ca5c23c | 2008-02-27 01:42:39 +0200 | [diff] [blame] | 1142 | xip_iprefetch(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | cond_resched(); |
| 1144 | |
| 1145 | /* |
| 1146 | * We're back. However someone else might have |
| 1147 | * decided to go write to the chip if we are in |
| 1148 | * a suspended erase state. If so let's wait |
| 1149 | * until it's done. |
| 1150 | */ |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1151 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | while (chip->state != newstate) { |
| 1153 | DECLARE_WAITQUEUE(wait, current); |
| 1154 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1155 | add_wait_queue(&chip->wq, &wait); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1156 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | schedule(); |
| 1158 | remove_wait_queue(&chip->wq, &wait); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1159 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | } |
| 1161 | /* Disallow XIP again */ |
| 1162 | local_irq_disable(); |
| 1163 | |
| 1164 | /* Resume the write or erase operation */ |
| 1165 | map_write(map, CMD(0xd0), adr); |
| 1166 | map_write(map, CMD(0x70), adr); |
| 1167 | chip->state = oldstate; |
| 1168 | start = xip_currtime(); |
| 1169 | } else if (usec >= 1000000/HZ) { |
| 1170 | /* |
| 1171 | * Try to save on CPU power when waiting delay |
| 1172 | * is at least a system timer tick period. |
| 1173 | * No need to be extremely accurate here. |
| 1174 | */ |
| 1175 | xip_cpu_idle(); |
| 1176 | } |
| 1177 | status = map_read(map, adr); |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1178 | done = xip_elapsed_since(start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | } while (!map_word_andequal(map, status, OK, OK) |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1180 | && done < usec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1182 | return (done >= usec) ? -ETIME : 0; |
| 1183 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | |
| 1185 | /* |
| 1186 | * The INVALIDATE_CACHED_RANGE() macro is normally used in parallel while |
| 1187 | * the flash is actively programming or erasing since we have to poll for |
| 1188 | * 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] | 1189 | * 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] | 1190 | * and stub it out from INVAL_CACHE_AND_WAIT. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | */ |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 1192 | #define XIP_INVAL_CACHED_RANGE(map, from, size) \ |
| 1193 | INVALIDATE_CACHED_RANGE(map, from, size) |
| 1194 | |
Anders Grafström | e93cafe | 2008-08-05 18:37:41 +0200 | [diff] [blame] | 1195 | #define INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, inval_adr, inval_len, usec, usec_max) \ |
| 1196 | xip_wait_for_operation(map, chip, cmd_adr, usec_max) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | |
| 1198 | #else |
| 1199 | |
| 1200 | #define xip_disable(map, chip, adr) |
| 1201 | #define xip_enable(map, chip, adr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | #define XIP_INVAL_CACHED_RANGE(x...) |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1203 | #define INVAL_CACHE_AND_WAIT inval_cache_and_wait_for_operation |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1205 | static int inval_cache_and_wait_for_operation( |
| 1206 | struct map_info *map, struct flchip *chip, |
| 1207 | unsigned long cmd_adr, unsigned long inval_adr, int inval_len, |
Anders Grafström | e93cafe | 2008-08-05 18:37:41 +0200 | [diff] [blame] | 1208 | unsigned int chip_op_time, unsigned int chip_op_time_max) |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1209 | { |
| 1210 | struct cfi_private *cfi = map->fldrv_priv; |
| 1211 | map_word status, status_OK = CMD(0x80); |
Alexey Korolev | 46a1652 | 2006-06-28 19:22:07 +0100 | [diff] [blame] | 1212 | int chip_state = chip->state; |
Alexey Korolev | 998453f | 2008-07-16 15:28:56 +0100 | [diff] [blame] | 1213 | unsigned int timeo, sleep_time, reset_timeo; |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 1214 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1215 | mutex_unlock(&chip->mutex); |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1216 | if (inval_len) |
| 1217 | INVALIDATE_CACHED_RANGE(map, inval_adr, inval_len); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1218 | mutex_lock(&chip->mutex); |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1219 | |
Anders Grafström | e93cafe | 2008-08-05 18:37:41 +0200 | [diff] [blame] | 1220 | timeo = chip_op_time_max; |
Alexey Korolev | 46a1652 | 2006-06-28 19:22:07 +0100 | [diff] [blame] | 1221 | if (!timeo) |
| 1222 | timeo = 500000; |
Alexey Korolev | 998453f | 2008-07-16 15:28:56 +0100 | [diff] [blame] | 1223 | reset_timeo = timeo; |
Alexey Korolev | 46a1652 | 2006-06-28 19:22:07 +0100 | [diff] [blame] | 1224 | sleep_time = chip_op_time / 2; |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1225 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1226 | for (;;) { |
Joakim Tjernlund | ecf3fde | 2011-02-07 17:07:11 +0100 | [diff] [blame] | 1227 | if (chip->state != chip_state) { |
| 1228 | /* Someone's suspended the operation: sleep */ |
| 1229 | DECLARE_WAITQUEUE(wait, current); |
| 1230 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1231 | add_wait_queue(&chip->wq, &wait); |
| 1232 | mutex_unlock(&chip->mutex); |
| 1233 | schedule(); |
| 1234 | remove_wait_queue(&chip->wq, &wait); |
| 1235 | mutex_lock(&chip->mutex); |
| 1236 | continue; |
| 1237 | } |
| 1238 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1239 | status = map_read(map, cmd_adr); |
| 1240 | if (map_word_andequal(map, status, status_OK, status_OK)) |
| 1241 | break; |
| 1242 | |
Joakim Tjernlund | ecf3fde | 2011-02-07 17:07:11 +0100 | [diff] [blame] | 1243 | if (chip->erase_suspended && chip_state == FL_ERASING) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1244 | /* Erase suspend occurred while sleep: reset timeout */ |
Joakim Tjernlund | ecf3fde | 2011-02-07 17:07:11 +0100 | [diff] [blame] | 1245 | timeo = reset_timeo; |
| 1246 | chip->erase_suspended = 0; |
| 1247 | } |
| 1248 | if (chip->write_suspended && chip_state == FL_WRITING) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1249 | /* Write suspend occurred while sleep: reset timeout */ |
Joakim Tjernlund | ecf3fde | 2011-02-07 17:07:11 +0100 | [diff] [blame] | 1250 | timeo = reset_timeo; |
| 1251 | chip->write_suspended = 0; |
| 1252 | } |
Alexey Korolev | 46a1652 | 2006-06-28 19:22:07 +0100 | [diff] [blame] | 1253 | if (!timeo) { |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1254 | map_write(map, CMD(0x70), cmd_adr); |
| 1255 | chip->state = FL_STATUS; |
| 1256 | return -ETIME; |
| 1257 | } |
| 1258 | |
Alexey Korolev | 46a1652 | 2006-06-28 19:22:07 +0100 | [diff] [blame] | 1259 | /* OK Still waiting. Drop the lock, wait a while and retry. */ |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1260 | mutex_unlock(&chip->mutex); |
Alexey Korolev | 46a1652 | 2006-06-28 19:22:07 +0100 | [diff] [blame] | 1261 | if (sleep_time >= 1000000/HZ) { |
| 1262 | /* |
| 1263 | * Half of the normal delay still remaining |
| 1264 | * can be performed with a sleeping delay instead |
| 1265 | * of busy waiting. |
| 1266 | */ |
| 1267 | msleep(sleep_time/1000); |
| 1268 | timeo -= sleep_time; |
| 1269 | sleep_time = 1000000/HZ; |
| 1270 | } else { |
| 1271 | udelay(1); |
| 1272 | cond_resched(); |
| 1273 | timeo--; |
| 1274 | } |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1275 | mutex_lock(&chip->mutex); |
Alexey Korolev | 46a1652 | 2006-06-28 19:22:07 +0100 | [diff] [blame] | 1276 | } |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1277 | |
| 1278 | /* Done and happy. */ |
| 1279 | chip->state = FL_STATUS; |
| 1280 | return 0; |
| 1281 | } |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 1282 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | #endif |
| 1284 | |
Anders Grafström | e93cafe | 2008-08-05 18:37:41 +0200 | [diff] [blame] | 1285 | #define WAIT_TIMEOUT(map, chip, adr, udelay, udelay_max) \ |
| 1286 | INVAL_CACHE_AND_WAIT(map, chip, adr, 0, 0, udelay, udelay_max); |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1287 | |
| 1288 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | static int do_point_onechip (struct map_info *map, struct flchip *chip, loff_t adr, size_t len) |
| 1290 | { |
| 1291 | unsigned long cmd_addr; |
| 1292 | struct cfi_private *cfi = map->fldrv_priv; |
| 1293 | int ret = 0; |
| 1294 | |
| 1295 | adr += chip->start; |
| 1296 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1297 | /* Ensure cmd read/writes are aligned. */ |
| 1298 | cmd_addr = adr & ~(map_bankwidth(map)-1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1300 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | |
| 1302 | ret = get_chip(map, chip, cmd_addr, FL_POINT); |
| 1303 | |
| 1304 | if (!ret) { |
| 1305 | if (chip->state != FL_POINT && chip->state != FL_READY) |
| 1306 | map_write(map, CMD(0xff), cmd_addr); |
| 1307 | |
| 1308 | chip->state = FL_POINT; |
| 1309 | chip->ref_point_counter++; |
| 1310 | } |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1311 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | |
| 1313 | return ret; |
| 1314 | } |
| 1315 | |
Jared Hulbert | a98889f | 2008-04-29 23:26:49 -0700 | [diff] [blame] | 1316 | static int cfi_intelext_point(struct mtd_info *mtd, loff_t from, size_t len, |
| 1317 | size_t *retlen, void **virt, resource_size_t *phys) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | { |
| 1319 | struct map_info *map = mtd->priv; |
| 1320 | struct cfi_private *cfi = map->fldrv_priv; |
Andy Lowe | 097f257 | 2007-01-12 18:05:10 -0500 | [diff] [blame] | 1321 | unsigned long ofs, last_end = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | int chipnum; |
| 1323 | int ret = 0; |
| 1324 | |
Artem Bityutskiy | 5def489 | 2012-02-03 16:23:52 +0200 | [diff] [blame] | 1325 | if (!map->virt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | return -EINVAL; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1327 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | /* Now lock the chip(s) to POINT state */ |
| 1329 | |
| 1330 | /* ofs: offset within the first chip that the first read should start */ |
| 1331 | chipnum = (from >> cfi->chipshift); |
| 1332 | ofs = from - (chipnum << cfi->chipshift); |
| 1333 | |
Jared Hulbert | a98889f | 2008-04-29 23:26:49 -0700 | [diff] [blame] | 1334 | *virt = map->virt + cfi->chips[chipnum].start + ofs; |
Jared Hulbert | a98889f | 2008-04-29 23:26:49 -0700 | [diff] [blame] | 1335 | if (phys) |
| 1336 | *phys = map->phys + cfi->chips[chipnum].start + ofs; |
Andy Lowe | 097f257 | 2007-01-12 18:05:10 -0500 | [diff] [blame] | 1337 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | while (len) { |
| 1339 | unsigned long thislen; |
| 1340 | |
| 1341 | if (chipnum >= cfi->numchips) |
| 1342 | break; |
| 1343 | |
Andy Lowe | 097f257 | 2007-01-12 18:05:10 -0500 | [diff] [blame] | 1344 | /* We cannot point across chips that are virtually disjoint */ |
| 1345 | if (!last_end) |
| 1346 | last_end = cfi->chips[chipnum].start; |
| 1347 | else if (cfi->chips[chipnum].start != last_end) |
| 1348 | break; |
| 1349 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | if ((len + ofs -1) >> cfi->chipshift) |
| 1351 | thislen = (1<<cfi->chipshift) - ofs; |
| 1352 | else |
| 1353 | thislen = len; |
| 1354 | |
| 1355 | ret = do_point_onechip(map, &cfi->chips[chipnum], ofs, thislen); |
| 1356 | if (ret) |
| 1357 | break; |
| 1358 | |
| 1359 | *retlen += thislen; |
| 1360 | len -= thislen; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1361 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | ofs = 0; |
Andy Lowe | 097f257 | 2007-01-12 18:05:10 -0500 | [diff] [blame] | 1363 | last_end += 1 << cfi->chipshift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | chipnum++; |
| 1365 | } |
| 1366 | return 0; |
| 1367 | } |
| 1368 | |
Artem Bityutskiy | 5e4e6e3 | 2012-02-03 13:20:43 +0200 | [diff] [blame] | 1369 | static int cfi_intelext_unpoint(struct mtd_info *mtd, loff_t from, size_t len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | { |
| 1371 | struct map_info *map = mtd->priv; |
| 1372 | struct cfi_private *cfi = map->fldrv_priv; |
| 1373 | unsigned long ofs; |
Artem Bityutskiy | 5e4e6e3 | 2012-02-03 13:20:43 +0200 | [diff] [blame] | 1374 | int chipnum, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | |
| 1376 | /* Now unlock the chip(s) POINT state */ |
| 1377 | |
| 1378 | /* ofs: offset within the first chip that the first read should start */ |
| 1379 | chipnum = (from >> cfi->chipshift); |
| 1380 | ofs = from - (chipnum << cfi->chipshift); |
| 1381 | |
Artem Bityutskiy | 5e4e6e3 | 2012-02-03 13:20:43 +0200 | [diff] [blame] | 1382 | while (len && !err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1383 | unsigned long thislen; |
| 1384 | struct flchip *chip; |
| 1385 | |
| 1386 | chip = &cfi->chips[chipnum]; |
| 1387 | if (chipnum >= cfi->numchips) |
| 1388 | break; |
| 1389 | |
| 1390 | if ((len + ofs -1) >> cfi->chipshift) |
| 1391 | thislen = (1<<cfi->chipshift) - ofs; |
| 1392 | else |
| 1393 | thislen = len; |
| 1394 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1395 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | if (chip->state == FL_POINT) { |
| 1397 | chip->ref_point_counter--; |
| 1398 | if(chip->ref_point_counter == 0) |
| 1399 | chip->state = FL_READY; |
Artem Bityutskiy | 5e4e6e3 | 2012-02-03 13:20:43 +0200 | [diff] [blame] | 1400 | } else { |
| 1401 | printk(KERN_ERR "%s: Error: unpoint called on non pointed region\n", map->name); |
| 1402 | err = -EINVAL; |
| 1403 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | |
| 1405 | put_chip(map, chip, chip->start); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1406 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | |
| 1408 | len -= thislen; |
| 1409 | ofs = 0; |
| 1410 | chipnum++; |
| 1411 | } |
Artem Bityutskiy | 5e4e6e3 | 2012-02-03 13:20:43 +0200 | [diff] [blame] | 1412 | |
| 1413 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | } |
| 1415 | |
| 1416 | static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) |
| 1417 | { |
| 1418 | unsigned long cmd_addr; |
| 1419 | struct cfi_private *cfi = map->fldrv_priv; |
| 1420 | int ret; |
| 1421 | |
| 1422 | adr += chip->start; |
| 1423 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1424 | /* Ensure cmd read/writes are aligned. */ |
| 1425 | cmd_addr = adr & ~(map_bankwidth(map)-1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1427 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | ret = get_chip(map, chip, cmd_addr, FL_READY); |
| 1429 | if (ret) { |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1430 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | return ret; |
| 1432 | } |
| 1433 | |
| 1434 | if (chip->state != FL_POINT && chip->state != FL_READY) { |
| 1435 | map_write(map, CMD(0xff), cmd_addr); |
| 1436 | |
| 1437 | chip->state = FL_READY; |
| 1438 | } |
| 1439 | |
| 1440 | map_copy_from(map, buf, adr, len); |
| 1441 | |
| 1442 | put_chip(map, chip, cmd_addr); |
| 1443 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1444 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | return 0; |
| 1446 | } |
| 1447 | |
| 1448 | static int cfi_intelext_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) |
| 1449 | { |
| 1450 | struct map_info *map = mtd->priv; |
| 1451 | struct cfi_private *cfi = map->fldrv_priv; |
| 1452 | unsigned long ofs; |
| 1453 | int chipnum; |
| 1454 | int ret = 0; |
| 1455 | |
| 1456 | /* ofs: offset within the first chip that the first read should start */ |
| 1457 | chipnum = (from >> cfi->chipshift); |
| 1458 | ofs = from - (chipnum << cfi->chipshift); |
| 1459 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | while (len) { |
| 1461 | unsigned long thislen; |
| 1462 | |
| 1463 | if (chipnum >= cfi->numchips) |
| 1464 | break; |
| 1465 | |
| 1466 | if ((len + ofs -1) >> cfi->chipshift) |
| 1467 | thislen = (1<<cfi->chipshift) - ofs; |
| 1468 | else |
| 1469 | thislen = len; |
| 1470 | |
| 1471 | ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); |
| 1472 | if (ret) |
| 1473 | break; |
| 1474 | |
| 1475 | *retlen += thislen; |
| 1476 | len -= thislen; |
| 1477 | buf += thislen; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1478 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | ofs = 0; |
| 1480 | chipnum++; |
| 1481 | } |
| 1482 | return ret; |
| 1483 | } |
| 1484 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1485 | 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] | 1486 | unsigned long adr, map_word datum, int mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | { |
| 1488 | struct cfi_private *cfi = map->fldrv_priv; |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1489 | map_word status, write_cmd; |
| 1490 | int ret=0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | |
| 1492 | adr += chip->start; |
| 1493 | |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1494 | switch (mode) { |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 1495 | case FL_WRITING: |
Guillaume LECERF | b5d194c | 2010-10-26 10:55:29 +0100 | [diff] [blame] | 1496 | write_cmd = (cfi->cfiq->P_ID != P_ID_INTEL_PERFORMANCE) ? CMD(0x40) : CMD(0x41); |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 1497 | break; |
| 1498 | case FL_OTP_WRITE: |
| 1499 | write_cmd = CMD(0xc0); |
| 1500 | break; |
| 1501 | default: |
| 1502 | return -EINVAL; |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1503 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1505 | mutex_lock(&chip->mutex); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1506 | ret = get_chip(map, chip, adr, mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | if (ret) { |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1508 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1509 | return ret; |
| 1510 | } |
| 1511 | |
| 1512 | XIP_INVAL_CACHED_RANGE(map, adr, map_bankwidth(map)); |
| 1513 | ENABLE_VPP(map); |
| 1514 | xip_disable(map, chip, adr); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1515 | map_write(map, write_cmd, adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | map_write(map, datum, adr); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1517 | chip->state = mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1519 | ret = INVAL_CACHE_AND_WAIT(map, chip, adr, |
| 1520 | adr, map_bankwidth(map), |
Anders Grafström | e93cafe | 2008-08-05 18:37:41 +0200 | [diff] [blame] | 1521 | chip->word_write_time, |
| 1522 | chip->word_write_time_max); |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1523 | if (ret) { |
| 1524 | xip_enable(map, chip, adr); |
| 1525 | printk(KERN_ERR "%s: word write error (status timeout)\n", map->name); |
| 1526 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1527 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1529 | /* check for errors */ |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1530 | status = map_read(map, adr); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1531 | if (map_word_bitsset(map, status, CMD(0x1a))) { |
| 1532 | unsigned long chipstatus = MERGESTATUS(status); |
| 1533 | |
| 1534 | /* reset status */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | map_write(map, CMD(0x50), adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | map_write(map, CMD(0x70), adr); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1537 | xip_enable(map, chip, adr); |
| 1538 | |
| 1539 | if (chipstatus & 0x02) { |
| 1540 | ret = -EROFS; |
| 1541 | } else if (chipstatus & 0x08) { |
| 1542 | printk(KERN_ERR "%s: word write error (bad VPP)\n", map->name); |
| 1543 | ret = -EIO; |
| 1544 | } else { |
| 1545 | printk(KERN_ERR "%s: word write error (status 0x%lx)\n", map->name, chipstatus); |
| 1546 | ret = -EINVAL; |
| 1547 | } |
| 1548 | |
| 1549 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | } |
| 1551 | |
| 1552 | xip_enable(map, chip, adr); |
Paul Parsons | 85e5b2f | 2012-03-07 14:10:33 +0000 | [diff] [blame] | 1553 | out: DISABLE_VPP(map); |
| 1554 | put_chip(map, chip, adr); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1555 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | return ret; |
| 1557 | } |
| 1558 | |
| 1559 | |
| 1560 | static int cfi_intelext_write_words (struct mtd_info *mtd, loff_t to , size_t len, size_t *retlen, const u_char *buf) |
| 1561 | { |
| 1562 | struct map_info *map = mtd->priv; |
| 1563 | struct cfi_private *cfi = map->fldrv_priv; |
| 1564 | int ret = 0; |
| 1565 | int chipnum; |
| 1566 | unsigned long ofs; |
| 1567 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1568 | chipnum = to >> cfi->chipshift; |
| 1569 | ofs = to - (chipnum << cfi->chipshift); |
| 1570 | |
| 1571 | /* If it's not bus-aligned, do the first byte write */ |
| 1572 | if (ofs & (map_bankwidth(map)-1)) { |
| 1573 | unsigned long bus_ofs = ofs & ~(map_bankwidth(map)-1); |
| 1574 | int gap = ofs - bus_ofs; |
| 1575 | int n; |
| 1576 | map_word datum; |
| 1577 | |
| 1578 | n = min_t(int, len, map_bankwidth(map)-gap); |
| 1579 | datum = map_word_ff(map); |
| 1580 | datum = map_word_load_partial(map, datum, buf, gap, n); |
| 1581 | |
| 1582 | ret = do_write_oneword(map, &cfi->chips[chipnum], |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1583 | bus_ofs, datum, FL_WRITING); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1584 | if (ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1585 | return ret; |
| 1586 | |
| 1587 | len -= n; |
| 1588 | ofs += n; |
| 1589 | buf += n; |
| 1590 | (*retlen) += n; |
| 1591 | |
| 1592 | if (ofs >> cfi->chipshift) { |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1593 | chipnum ++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | ofs = 0; |
| 1595 | if (chipnum == cfi->numchips) |
| 1596 | return 0; |
| 1597 | } |
| 1598 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1599 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | while(len >= map_bankwidth(map)) { |
| 1601 | map_word datum = map_word_load(map, buf); |
| 1602 | |
| 1603 | ret = do_write_oneword(map, &cfi->chips[chipnum], |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1604 | ofs, datum, FL_WRITING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1605 | if (ret) |
| 1606 | return ret; |
| 1607 | |
| 1608 | ofs += map_bankwidth(map); |
| 1609 | buf += map_bankwidth(map); |
| 1610 | (*retlen) += map_bankwidth(map); |
| 1611 | len -= map_bankwidth(map); |
| 1612 | |
| 1613 | if (ofs >> cfi->chipshift) { |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1614 | chipnum ++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1615 | ofs = 0; |
| 1616 | if (chipnum == cfi->numchips) |
| 1617 | return 0; |
| 1618 | } |
| 1619 | } |
| 1620 | |
| 1621 | if (len & (map_bankwidth(map)-1)) { |
| 1622 | map_word datum; |
| 1623 | |
| 1624 | datum = map_word_ff(map); |
| 1625 | datum = map_word_load_partial(map, datum, buf, 0, len); |
| 1626 | |
| 1627 | ret = do_write_oneword(map, &cfi->chips[chipnum], |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 1628 | ofs, datum, FL_WRITING); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1629 | if (ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | return ret; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1631 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | (*retlen) += len; |
| 1633 | } |
| 1634 | |
| 1635 | return 0; |
| 1636 | } |
| 1637 | |
| 1638 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1639 | 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] | 1640 | unsigned long adr, const struct kvec **pvec, |
| 1641 | unsigned long *pvec_seek, int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1642 | { |
| 1643 | struct cfi_private *cfi = map->fldrv_priv; |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1644 | map_word status, write_cmd, datum; |
| 1645 | unsigned long cmd_adr; |
| 1646 | int ret, wbufsize, word_gap, words; |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1647 | const struct kvec *vec; |
| 1648 | unsigned long vec_seek; |
Massimo Cirillo | 646fd12 | 2008-01-11 10:24:11 +0000 | [diff] [blame] | 1649 | unsigned long initial_adr; |
| 1650 | int initial_len = len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | |
| 1652 | wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; |
| 1653 | adr += chip->start; |
Massimo Cirillo | 646fd12 | 2008-01-11 10:24:11 +0000 | [diff] [blame] | 1654 | initial_adr = adr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | cmd_adr = adr & ~(wbufsize-1); |
Nicolas Pitre | 638d983 | 2005-08-06 05:40:46 +0100 | [diff] [blame] | 1656 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | /* Let's determine this according to the interleave only once */ |
Guillaume LECERF | b5d194c | 2010-10-26 10:55:29 +0100 | [diff] [blame] | 1658 | write_cmd = (cfi->cfiq->P_ID != P_ID_INTEL_PERFORMANCE) ? CMD(0xe8) : CMD(0xe9); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1660 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | ret = get_chip(map, chip, cmd_adr, FL_WRITING); |
| 1662 | if (ret) { |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1663 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1664 | return ret; |
| 1665 | } |
| 1666 | |
Massimo Cirillo | 646fd12 | 2008-01-11 10:24:11 +0000 | [diff] [blame] | 1667 | XIP_INVAL_CACHED_RANGE(map, initial_adr, initial_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1668 | ENABLE_VPP(map); |
| 1669 | xip_disable(map, chip, cmd_adr); |
| 1670 | |
David Woodhouse | 151e765 | 2006-05-14 01:51:54 +0100 | [diff] [blame] | 1671 | /* §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] | 1672 | [...], the device will not accept any more Write to Buffer commands". |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1673 | So we must check here and reset those bits if they're set. Otherwise |
| 1674 | we're just pissing in the wind */ |
Nicolas Pitre | 6e7a680 | 2006-03-29 23:31:42 +0100 | [diff] [blame] | 1675 | if (chip->state != FL_STATUS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | map_write(map, CMD(0x70), cmd_adr); |
Nicolas Pitre | 6e7a680 | 2006-03-29 23:31:42 +0100 | [diff] [blame] | 1677 | chip->state = FL_STATUS; |
| 1678 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1679 | status = map_read(map, cmd_adr); |
| 1680 | if (map_word_bitsset(map, status, CMD(0x30))) { |
| 1681 | xip_enable(map, chip, cmd_adr); |
| 1682 | printk(KERN_WARNING "SR.4 or SR.5 bits set in buffer write (status %lx). Clearing.\n", status.x[0]); |
| 1683 | xip_disable(map, chip, cmd_adr); |
| 1684 | map_write(map, CMD(0x50), cmd_adr); |
| 1685 | map_write(map, CMD(0x70), cmd_adr); |
| 1686 | } |
| 1687 | |
| 1688 | chip->state = FL_WRITING_TO_BUFFER; |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1689 | map_write(map, write_cmd, cmd_adr); |
Anders Grafström | e93cafe | 2008-08-05 18:37:41 +0200 | [diff] [blame] | 1690 | ret = WAIT_TIMEOUT(map, chip, cmd_adr, 0, 0); |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1691 | if (ret) { |
| 1692 | /* Argh. Not ready for write to buffer */ |
| 1693 | map_word Xstatus = map_read(map, cmd_adr); |
| 1694 | map_write(map, CMD(0x70), cmd_adr); |
| 1695 | chip->state = FL_STATUS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1696 | status = map_read(map, cmd_adr); |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1697 | map_write(map, CMD(0x50), cmd_adr); |
| 1698 | map_write(map, CMD(0x70), cmd_adr); |
| 1699 | xip_enable(map, chip, cmd_adr); |
| 1700 | printk(KERN_ERR "%s: Chip not ready for buffer write. Xstatus = %lx, status = %lx\n", |
| 1701 | map->name, Xstatus.x[0], status.x[0]); |
| 1702 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1703 | } |
| 1704 | |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1705 | /* Figure out the number of words to write */ |
| 1706 | word_gap = (-adr & (map_bankwidth(map)-1)); |
Julia Lawall | c8872b0 | 2008-08-02 17:14:21 +0200 | [diff] [blame] | 1707 | words = DIV_ROUND_UP(len - word_gap, map_bankwidth(map)); |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1708 | if (!word_gap) { |
| 1709 | words--; |
| 1710 | } else { |
| 1711 | word_gap = map_bankwidth(map) - word_gap; |
| 1712 | adr -= word_gap; |
| 1713 | datum = map_word_ff(map); |
| 1714 | } |
| 1715 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | /* Write length of data to come */ |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1717 | map_write(map, CMD(words), cmd_adr ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | |
| 1719 | /* Write data */ |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1720 | vec = *pvec; |
| 1721 | vec_seek = *pvec_seek; |
| 1722 | do { |
| 1723 | int n = map_bankwidth(map) - word_gap; |
| 1724 | if (n > vec->iov_len - vec_seek) |
| 1725 | n = vec->iov_len - vec_seek; |
| 1726 | if (n > len) |
| 1727 | n = len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1728 | |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1729 | if (!word_gap && len < map_bankwidth(map)) |
| 1730 | datum = map_word_ff(map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1731 | |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1732 | datum = map_word_load_partial(map, datum, |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1733 | vec->iov_base + vec_seek, |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1734 | word_gap, n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1735 | |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1736 | len -= n; |
| 1737 | word_gap += n; |
| 1738 | if (!len || word_gap == map_bankwidth(map)) { |
| 1739 | map_write(map, datum, adr); |
| 1740 | adr += map_bankwidth(map); |
| 1741 | word_gap = 0; |
| 1742 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1744 | vec_seek += n; |
| 1745 | if (vec_seek == vec->iov_len) { |
| 1746 | vec++; |
| 1747 | vec_seek = 0; |
| 1748 | } |
| 1749 | } while (len); |
| 1750 | *pvec = vec; |
| 1751 | *pvec_seek = vec_seek; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | |
| 1753 | /* GO GO GO */ |
| 1754 | map_write(map, CMD(0xd0), cmd_adr); |
| 1755 | chip->state = FL_WRITING; |
| 1756 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1757 | ret = INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, |
Massimo Cirillo | 646fd12 | 2008-01-11 10:24:11 +0000 | [diff] [blame] | 1758 | initial_adr, initial_len, |
Anders Grafström | e93cafe | 2008-08-05 18:37:41 +0200 | [diff] [blame] | 1759 | chip->buffer_write_time, |
| 1760 | chip->buffer_write_time_max); |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1761 | if (ret) { |
| 1762 | map_write(map, CMD(0x70), cmd_adr); |
| 1763 | chip->state = FL_STATUS; |
| 1764 | xip_enable(map, chip, cmd_adr); |
| 1765 | printk(KERN_ERR "%s: buffer write error (status timeout)\n", map->name); |
| 1766 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1767 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1768 | |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1769 | /* check for errors */ |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1770 | status = map_read(map, cmd_adr); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1771 | if (map_word_bitsset(map, status, CMD(0x1a))) { |
| 1772 | unsigned long chipstatus = MERGESTATUS(status); |
| 1773 | |
| 1774 | /* reset status */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | map_write(map, CMD(0x50), cmd_adr); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1776 | map_write(map, CMD(0x70), cmd_adr); |
| 1777 | xip_enable(map, chip, cmd_adr); |
| 1778 | |
| 1779 | if (chipstatus & 0x02) { |
| 1780 | ret = -EROFS; |
| 1781 | } else if (chipstatus & 0x08) { |
| 1782 | printk(KERN_ERR "%s: buffer write error (bad VPP)\n", map->name); |
| 1783 | ret = -EIO; |
| 1784 | } else { |
| 1785 | printk(KERN_ERR "%s: buffer write error (status 0x%lx)\n", map->name, chipstatus); |
| 1786 | ret = -EINVAL; |
| 1787 | } |
| 1788 | |
| 1789 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1790 | } |
| 1791 | |
| 1792 | xip_enable(map, chip, cmd_adr); |
Paul Parsons | 85e5b2f | 2012-03-07 14:10:33 +0000 | [diff] [blame] | 1793 | out: DISABLE_VPP(map); |
| 1794 | put_chip(map, chip, cmd_adr); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1795 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1796 | return ret; |
| 1797 | } |
| 1798 | |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1799 | static int cfi_intelext_writev (struct mtd_info *mtd, const struct kvec *vecs, |
| 1800 | unsigned long count, loff_t to, size_t *retlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1801 | { |
| 1802 | struct map_info *map = mtd->priv; |
| 1803 | struct cfi_private *cfi = map->fldrv_priv; |
| 1804 | int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; |
| 1805 | int ret = 0; |
| 1806 | int chipnum; |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1807 | unsigned long ofs, vec_seek, i; |
| 1808 | size_t len = 0; |
| 1809 | |
| 1810 | for (i = 0; i < count; i++) |
| 1811 | len += vecs[i].iov_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1812 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | if (!len) |
| 1814 | return 0; |
| 1815 | |
| 1816 | chipnum = to >> cfi->chipshift; |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1817 | ofs = to - (chipnum << cfi->chipshift); |
| 1818 | vec_seek = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1819 | |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1820 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1821 | /* We must not cross write block boundaries */ |
| 1822 | int size = wbufsize - (ofs & (wbufsize-1)); |
| 1823 | |
| 1824 | if (size > len) |
| 1825 | size = len; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1826 | ret = do_write_buffer(map, &cfi->chips[chipnum], |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1827 | ofs, &vecs, &vec_seek, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1828 | if (ret) |
| 1829 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | |
| 1831 | ofs += size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | (*retlen) += size; |
| 1833 | len -= size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1834 | |
| 1835 | if (ofs >> cfi->chipshift) { |
| 1836 | chipnum ++; |
| 1837 | ofs = 0; |
| 1838 | if (chipnum == cfi->numchips) |
| 1839 | return 0; |
| 1840 | } |
Josh Boyer | df54b52c | 2005-12-06 17:28:19 +0000 | [diff] [blame] | 1841 | |
| 1842 | /* Be nice and reschedule with the chip in a usable state for other |
| 1843 | processes. */ |
| 1844 | cond_resched(); |
| 1845 | |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1846 | } while (len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1847 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | return 0; |
| 1849 | } |
| 1850 | |
Nicolas Pitre | e102d54 | 2005-08-06 05:46:59 +0100 | [diff] [blame] | 1851 | static int cfi_intelext_write_buffers (struct mtd_info *mtd, loff_t to, |
| 1852 | size_t len, size_t *retlen, const u_char *buf) |
| 1853 | { |
| 1854 | struct kvec vec; |
| 1855 | |
| 1856 | vec.iov_base = (void *) buf; |
| 1857 | vec.iov_len = len; |
| 1858 | |
| 1859 | return cfi_intelext_writev(mtd, &vec, 1, to, retlen); |
| 1860 | } |
| 1861 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1862 | static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, |
| 1863 | unsigned long adr, int len, void *thunk) |
| 1864 | { |
| 1865 | struct cfi_private *cfi = map->fldrv_priv; |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1866 | map_word status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1867 | int retries = 3; |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1868 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1869 | |
| 1870 | adr += chip->start; |
| 1871 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | retry: |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1873 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1874 | ret = get_chip(map, chip, adr, FL_ERASING); |
| 1875 | if (ret) { |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1876 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | return ret; |
| 1878 | } |
| 1879 | |
| 1880 | XIP_INVAL_CACHED_RANGE(map, adr, len); |
| 1881 | ENABLE_VPP(map); |
| 1882 | xip_disable(map, chip, adr); |
| 1883 | |
| 1884 | /* Clear the status register first */ |
| 1885 | map_write(map, CMD(0x50), adr); |
| 1886 | |
| 1887 | /* Now erase */ |
| 1888 | map_write(map, CMD(0x20), adr); |
| 1889 | map_write(map, CMD(0xD0), adr); |
| 1890 | chip->state = FL_ERASING; |
| 1891 | chip->erase_suspended = 0; |
| 1892 | |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1893 | ret = INVAL_CACHE_AND_WAIT(map, chip, adr, |
| 1894 | adr, len, |
Anders Grafström | e93cafe | 2008-08-05 18:37:41 +0200 | [diff] [blame] | 1895 | chip->erase_time, |
| 1896 | chip->erase_time_max); |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 1897 | if (ret) { |
| 1898 | map_write(map, CMD(0x70), adr); |
| 1899 | chip->state = FL_STATUS; |
| 1900 | xip_enable(map, chip, adr); |
| 1901 | printk(KERN_ERR "%s: block erase error: (status timeout)\n", map->name); |
| 1902 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | } |
| 1904 | |
| 1905 | /* We've broken this before. It doesn't hurt to be safe */ |
| 1906 | map_write(map, CMD(0x70), adr); |
| 1907 | chip->state = FL_STATUS; |
| 1908 | status = map_read(map, adr); |
| 1909 | |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1910 | /* check for errors */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1911 | if (map_word_bitsset(map, status, CMD(0x3a))) { |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1912 | unsigned long chipstatus = MERGESTATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | |
| 1914 | /* Reset the error bits */ |
| 1915 | map_write(map, CMD(0x50), adr); |
| 1916 | map_write(map, CMD(0x70), adr); |
| 1917 | xip_enable(map, chip, adr); |
| 1918 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1919 | if ((chipstatus & 0x30) == 0x30) { |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1920 | printk(KERN_ERR "%s: block erase error: (bad command sequence, status 0x%lx)\n", map->name, chipstatus); |
| 1921 | ret = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1922 | } else if (chipstatus & 0x02) { |
| 1923 | /* Protection bit set */ |
| 1924 | ret = -EROFS; |
| 1925 | } else if (chipstatus & 0x8) { |
| 1926 | /* Voltage */ |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1927 | printk(KERN_ERR "%s: block erase error: (bad VPP)\n", map->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1928 | ret = -EIO; |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1929 | } else if (chipstatus & 0x20 && retries--) { |
| 1930 | printk(KERN_DEBUG "block erase failed at 0x%08lx: status 0x%lx. Retrying...\n", adr, chipstatus); |
Paul Parsons | 85e5b2f | 2012-03-07 14:10:33 +0000 | [diff] [blame] | 1931 | DISABLE_VPP(map); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1932 | put_chip(map, chip, adr); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1933 | mutex_unlock(&chip->mutex); |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1934 | goto retry; |
| 1935 | } else { |
| 1936 | 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] | 1937 | ret = -EIO; |
| 1938 | } |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1939 | |
| 1940 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1941 | } |
| 1942 | |
Nicolas Pitre | 4843653 | 2005-08-06 05:16:52 +0100 | [diff] [blame] | 1943 | xip_enable(map, chip, adr); |
Paul Parsons | 85e5b2f | 2012-03-07 14:10:33 +0000 | [diff] [blame] | 1944 | out: DISABLE_VPP(map); |
| 1945 | put_chip(map, chip, adr); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1946 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1947 | return ret; |
| 1948 | } |
| 1949 | |
Ben Dooks | 029a9eb | 2007-05-28 20:11:37 +0100 | [diff] [blame] | 1950 | static int cfi_intelext_erase_varsize(struct mtd_info *mtd, struct erase_info *instr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1951 | { |
| 1952 | unsigned long ofs, len; |
| 1953 | int ret; |
| 1954 | |
| 1955 | ofs = instr->addr; |
| 1956 | len = instr->len; |
| 1957 | |
| 1958 | ret = cfi_varsize_frob(mtd, do_erase_oneblock, ofs, len, NULL); |
| 1959 | if (ret) |
| 1960 | return ret; |
| 1961 | |
| 1962 | instr->state = MTD_ERASE_DONE; |
| 1963 | mtd_erase_callback(instr); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1964 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1965 | return 0; |
| 1966 | } |
| 1967 | |
| 1968 | static void cfi_intelext_sync (struct mtd_info *mtd) |
| 1969 | { |
| 1970 | struct map_info *map = mtd->priv; |
| 1971 | struct cfi_private *cfi = map->fldrv_priv; |
| 1972 | int i; |
| 1973 | struct flchip *chip; |
| 1974 | int ret = 0; |
| 1975 | |
| 1976 | for (i=0; !ret && i<cfi->numchips; i++) { |
| 1977 | chip = &cfi->chips[i]; |
| 1978 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1979 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1980 | ret = get_chip(map, chip, chip->start, FL_SYNCING); |
| 1981 | |
| 1982 | if (!ret) { |
| 1983 | chip->oldstate = chip->state; |
| 1984 | chip->state = FL_SYNCING; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1985 | /* No need to wake_up() on this state change - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1986 | * as the whole point is that nobody can do anything |
| 1987 | * with the chip now anyway. |
| 1988 | */ |
| 1989 | } |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1990 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | } |
| 1992 | |
| 1993 | /* Unlock the chips again */ |
| 1994 | |
| 1995 | for (i--; i >=0; i--) { |
| 1996 | chip = &cfi->chips[i]; |
| 1997 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1998 | mutex_lock(&chip->mutex); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1999 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2000 | if (chip->state == FL_SYNCING) { |
| 2001 | chip->state = chip->oldstate; |
Nicolas Pitre | 09c7933 | 2005-03-16 22:41:09 +0000 | [diff] [blame] | 2002 | chip->oldstate = FL_READY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2003 | wake_up(&chip->wq); |
| 2004 | } |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2005 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2006 | } |
| 2007 | } |
| 2008 | |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 2009 | static int __xipram do_getlockstatus_oneblock(struct map_info *map, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2010 | struct flchip *chip, |
| 2011 | unsigned long adr, |
| 2012 | int len, void *thunk) |
| 2013 | { |
| 2014 | struct cfi_private *cfi = map->fldrv_priv; |
| 2015 | int status, ofs_factor = cfi->interleave * cfi->device_type; |
| 2016 | |
Todd Poynor | c25bb1f | 2005-04-27 21:01:52 +0100 | [diff] [blame] | 2017 | adr += chip->start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2018 | xip_disable(map, chip, adr+(2*ofs_factor)); |
Todd Poynor | c25bb1f | 2005-04-27 21:01:52 +0100 | [diff] [blame] | 2019 | map_write(map, CMD(0x90), adr+(2*ofs_factor)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2020 | chip->state = FL_JEDEC_QUERY; |
| 2021 | status = cfi_read_query(map, adr+(2*ofs_factor)); |
| 2022 | xip_enable(map, chip, 0); |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 2023 | return status; |
| 2024 | } |
| 2025 | |
| 2026 | #ifdef DEBUG_LOCK_BITS |
| 2027 | static int __xipram do_printlockstatus_oneblock(struct map_info *map, |
| 2028 | struct flchip *chip, |
| 2029 | unsigned long adr, |
| 2030 | int len, void *thunk) |
| 2031 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2032 | printk(KERN_DEBUG "block status register for 0x%08lx is %x\n", |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 2033 | adr, do_getlockstatus_oneblock(map, chip, adr, len, thunk)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2034 | return 0; |
| 2035 | } |
| 2036 | #endif |
| 2037 | |
| 2038 | #define DO_XXLOCK_ONEBLOCK_LOCK ((void *) 1) |
| 2039 | #define DO_XXLOCK_ONEBLOCK_UNLOCK ((void *) 2) |
| 2040 | |
| 2041 | static int __xipram do_xxlock_oneblock(struct map_info *map, struct flchip *chip, |
| 2042 | unsigned long adr, int len, void *thunk) |
| 2043 | { |
| 2044 | struct cfi_private *cfi = map->fldrv_priv; |
Todd Poynor | 9a6e73e | 2005-03-29 23:06:40 +0100 | [diff] [blame] | 2045 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 2046 | int udelay; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2047 | int ret; |
| 2048 | |
| 2049 | adr += chip->start; |
| 2050 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2051 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2052 | ret = get_chip(map, chip, adr, FL_LOCKING); |
| 2053 | if (ret) { |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2054 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2055 | return ret; |
| 2056 | } |
| 2057 | |
| 2058 | ENABLE_VPP(map); |
| 2059 | xip_disable(map, chip, adr); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2060 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2061 | map_write(map, CMD(0x60), adr); |
| 2062 | if (thunk == DO_XXLOCK_ONEBLOCK_LOCK) { |
| 2063 | map_write(map, CMD(0x01), adr); |
| 2064 | chip->state = FL_LOCKING; |
| 2065 | } else if (thunk == DO_XXLOCK_ONEBLOCK_UNLOCK) { |
| 2066 | map_write(map, CMD(0xD0), adr); |
| 2067 | chip->state = FL_UNLOCKING; |
| 2068 | } else |
| 2069 | BUG(); |
| 2070 | |
Todd Poynor | 9a6e73e | 2005-03-29 23:06:40 +0100 | [diff] [blame] | 2071 | /* |
| 2072 | * If Instant Individual Block Locking supported then no need |
| 2073 | * to delay. |
| 2074 | */ |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 2075 | udelay = (!extp || !(extp->FeatureSupport & (1 << 5))) ? 1000000/HZ : 0; |
Todd Poynor | 9a6e73e | 2005-03-29 23:06:40 +0100 | [diff] [blame] | 2076 | |
Anders Grafström | e93cafe | 2008-08-05 18:37:41 +0200 | [diff] [blame] | 2077 | ret = WAIT_TIMEOUT(map, chip, adr, udelay, udelay * 100); |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 2078 | if (ret) { |
| 2079 | map_write(map, CMD(0x70), adr); |
| 2080 | chip->state = FL_STATUS; |
| 2081 | xip_enable(map, chip, adr); |
| 2082 | printk(KERN_ERR "%s: block unlock error: (status timeout)\n", map->name); |
| 2083 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2084 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2085 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2086 | xip_enable(map, chip, adr); |
Paul Parsons | 85e5b2f | 2012-03-07 14:10:33 +0000 | [diff] [blame] | 2087 | out: DISABLE_VPP(map); |
| 2088 | put_chip(map, chip, adr); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2089 | mutex_unlock(&chip->mutex); |
Nicolas Pitre | c172471 | 2006-03-30 15:52:41 +0100 | [diff] [blame] | 2090 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | } |
| 2092 | |
Adrian Hunter | 69423d9 | 2008-12-10 13:37:21 +0000 | [diff] [blame] | 2093 | static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2094 | { |
| 2095 | int ret; |
| 2096 | |
| 2097 | #ifdef DEBUG_LOCK_BITS |
| 2098 | printk(KERN_DEBUG "%s: lock status before, ofs=0x%08llx, len=0x%08X\n", |
Harvey Harrison | cb53b3b | 2008-04-18 13:44:19 -0700 | [diff] [blame] | 2099 | __func__, ofs, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2100 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, |
Randy Dunlap | 1da1caf | 2007-06-28 23:00:09 +0100 | [diff] [blame] | 2101 | ofs, len, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2102 | #endif |
| 2103 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2104 | ret = cfi_varsize_frob(mtd, do_xxlock_oneblock, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | ofs, len, DO_XXLOCK_ONEBLOCK_LOCK); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2106 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2107 | #ifdef DEBUG_LOCK_BITS |
| 2108 | printk(KERN_DEBUG "%s: lock status after, ret=%d\n", |
Harvey Harrison | cb53b3b | 2008-04-18 13:44:19 -0700 | [diff] [blame] | 2109 | __func__, ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2110 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, |
Randy Dunlap | 1da1caf | 2007-06-28 23:00:09 +0100 | [diff] [blame] | 2111 | ofs, len, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2112 | #endif |
| 2113 | |
| 2114 | return ret; |
| 2115 | } |
| 2116 | |
Adrian Hunter | 69423d9 | 2008-12-10 13:37:21 +0000 | [diff] [blame] | 2117 | static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2118 | { |
| 2119 | int ret; |
| 2120 | |
| 2121 | #ifdef DEBUG_LOCK_BITS |
| 2122 | printk(KERN_DEBUG "%s: lock status before, ofs=0x%08llx, len=0x%08X\n", |
Harvey Harrison | cb53b3b | 2008-04-18 13:44:19 -0700 | [diff] [blame] | 2123 | __func__, ofs, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2124 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, |
Randy Dunlap | 1da1caf | 2007-06-28 23:00:09 +0100 | [diff] [blame] | 2125 | ofs, len, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2126 | #endif |
| 2127 | |
| 2128 | ret = cfi_varsize_frob(mtd, do_xxlock_oneblock, |
| 2129 | ofs, len, DO_XXLOCK_ONEBLOCK_UNLOCK); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2130 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2131 | #ifdef DEBUG_LOCK_BITS |
| 2132 | printk(KERN_DEBUG "%s: lock status after, ret=%d\n", |
Harvey Harrison | cb53b3b | 2008-04-18 13:44:19 -0700 | [diff] [blame] | 2133 | __func__, ret); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2134 | cfi_varsize_frob(mtd, do_printlockstatus_oneblock, |
Randy Dunlap | 1da1caf | 2007-06-28 23:00:09 +0100 | [diff] [blame] | 2135 | ofs, len, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2136 | #endif |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2138 | return ret; |
| 2139 | } |
| 2140 | |
Richard Cochran | 9938424 | 2010-06-14 18:10:33 +0200 | [diff] [blame] | 2141 | static int cfi_intelext_is_locked(struct mtd_info *mtd, loff_t ofs, |
| 2142 | uint64_t len) |
| 2143 | { |
| 2144 | return cfi_varsize_frob(mtd, do_getlockstatus_oneblock, |
| 2145 | ofs, len, NULL) ? 1 : 0; |
| 2146 | } |
| 2147 | |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2148 | #ifdef CONFIG_MTD_OTP |
| 2149 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2150 | typedef int (*otp_op_t)(struct map_info *map, struct flchip *chip, |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2151 | u_long data_offset, u_char *buf, u_int size, |
| 2152 | u_long prot_offset, u_int groupno, u_int groupsize); |
| 2153 | |
| 2154 | static int __xipram |
| 2155 | do_otp_read(struct map_info *map, struct flchip *chip, u_long offset, |
| 2156 | u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) |
| 2157 | { |
| 2158 | struct cfi_private *cfi = map->fldrv_priv; |
| 2159 | int ret; |
| 2160 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2161 | mutex_lock(&chip->mutex); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2162 | ret = get_chip(map, chip, chip->start, FL_JEDEC_QUERY); |
| 2163 | if (ret) { |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2164 | mutex_unlock(&chip->mutex); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2165 | return ret; |
| 2166 | } |
| 2167 | |
| 2168 | /* 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] | 2169 | INVALIDATE_CACHED_RANGE(map, chip->start + offset, size); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2170 | |
| 2171 | xip_disable(map, chip, chip->start); |
| 2172 | if (chip->state != FL_JEDEC_QUERY) { |
| 2173 | map_write(map, CMD(0x90), chip->start); |
| 2174 | chip->state = FL_JEDEC_QUERY; |
| 2175 | } |
| 2176 | map_copy_from(map, buf, chip->start + offset, size); |
| 2177 | xip_enable(map, chip, chip->start); |
| 2178 | |
| 2179 | /* then ensure we don't keep OTP data in the cache */ |
Nicolas Pitre | 6da7012 | 2005-05-19 18:05:47 +0100 | [diff] [blame] | 2180 | INVALIDATE_CACHED_RANGE(map, chip->start + offset, size); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2181 | |
| 2182 | put_chip(map, chip, chip->start); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2183 | mutex_unlock(&chip->mutex); |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2184 | return 0; |
| 2185 | } |
| 2186 | |
| 2187 | static int |
| 2188 | do_otp_write(struct map_info *map, struct flchip *chip, u_long offset, |
| 2189 | u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) |
| 2190 | { |
| 2191 | int ret; |
| 2192 | |
| 2193 | while (size) { |
| 2194 | unsigned long bus_ofs = offset & ~(map_bankwidth(map)-1); |
| 2195 | int gap = offset - bus_ofs; |
| 2196 | int n = min_t(int, size, map_bankwidth(map)-gap); |
| 2197 | map_word datum = map_word_ff(map); |
| 2198 | |
| 2199 | datum = map_word_load_partial(map, datum, buf, gap, n); |
| 2200 | ret = do_write_oneword(map, chip, bus_ofs, datum, FL_OTP_WRITE); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2201 | if (ret) |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2202 | return ret; |
| 2203 | |
| 2204 | offset += n; |
| 2205 | buf += n; |
| 2206 | size -= n; |
| 2207 | } |
| 2208 | |
| 2209 | return 0; |
| 2210 | } |
| 2211 | |
| 2212 | static int |
| 2213 | do_otp_lock(struct map_info *map, struct flchip *chip, u_long offset, |
| 2214 | u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) |
| 2215 | { |
| 2216 | struct cfi_private *cfi = map->fldrv_priv; |
| 2217 | map_word datum; |
| 2218 | |
| 2219 | /* make sure area matches group boundaries */ |
Nicolas Pitre | 332d71f | 2005-02-17 20:35:04 +0000 | [diff] [blame] | 2220 | if (size != grpsz) |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2221 | return -EXDEV; |
| 2222 | |
| 2223 | datum = map_word_ff(map); |
| 2224 | datum = map_word_clr(map, datum, CMD(1 << grpno)); |
| 2225 | return do_write_oneword(map, chip, prot, datum, FL_OTP_WRITE); |
| 2226 | } |
| 2227 | |
| 2228 | static int cfi_intelext_otp_walk(struct mtd_info *mtd, loff_t from, size_t len, |
| 2229 | size_t *retlen, u_char *buf, |
| 2230 | otp_op_t action, int user_regs) |
| 2231 | { |
| 2232 | struct map_info *map = mtd->priv; |
| 2233 | struct cfi_private *cfi = map->fldrv_priv; |
| 2234 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
| 2235 | struct flchip *chip; |
| 2236 | struct cfi_intelext_otpinfo *otp; |
| 2237 | u_long devsize, reg_prot_offset, data_offset; |
| 2238 | u_int chip_num, chip_step, field, reg_fact_size, reg_user_size; |
| 2239 | u_int groups, groupno, groupsize, reg_fact_groups, reg_user_groups; |
| 2240 | int ret; |
| 2241 | |
| 2242 | *retlen = 0; |
| 2243 | |
| 2244 | /* Check that we actually have some OTP registers */ |
| 2245 | if (!extp || !(extp->FeatureSupport & 64) || !extp->NumProtectionFields) |
| 2246 | return -ENODATA; |
| 2247 | |
| 2248 | /* we need real chips here not virtual ones */ |
| 2249 | devsize = (1 << cfi->cfiq->DevSize) * cfi->interleave; |
| 2250 | chip_step = devsize >> cfi->chipshift; |
Nicolas Pitre | dce2b4d | 2005-04-01 17:36:29 +0100 | [diff] [blame] | 2251 | chip_num = 0; |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2252 | |
Nicolas Pitre | dce2b4d | 2005-04-01 17:36:29 +0100 | [diff] [blame] | 2253 | /* Some chips have OTP located in the _top_ partition only. |
| 2254 | For example: Intel 28F256L18T (T means top-parameter device) */ |
Hans-Christian Egtvedt | b2ef1a2 | 2009-11-05 15:53:43 +0100 | [diff] [blame] | 2255 | if (cfi->mfr == CFI_MFR_INTEL) { |
Nicolas Pitre | dce2b4d | 2005-04-01 17:36:29 +0100 | [diff] [blame] | 2256 | switch (cfi->id) { |
| 2257 | case 0x880b: |
| 2258 | case 0x880c: |
| 2259 | case 0x880d: |
| 2260 | chip_num = chip_step - 1; |
| 2261 | } |
| 2262 | } |
| 2263 | |
| 2264 | for ( ; chip_num < cfi->numchips; chip_num += chip_step) { |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2265 | chip = &cfi->chips[chip_num]; |
| 2266 | otp = (struct cfi_intelext_otpinfo *)&extp->extra[0]; |
| 2267 | |
| 2268 | /* first OTP region */ |
| 2269 | field = 0; |
| 2270 | reg_prot_offset = extp->ProtRegAddr; |
| 2271 | reg_fact_groups = 1; |
| 2272 | reg_fact_size = 1 << extp->FactProtRegSize; |
| 2273 | reg_user_groups = 1; |
| 2274 | reg_user_size = 1 << extp->UserProtRegSize; |
| 2275 | |
| 2276 | while (len > 0) { |
| 2277 | /* flash geometry fixup */ |
| 2278 | data_offset = reg_prot_offset + 1; |
| 2279 | data_offset *= cfi->interleave * cfi->device_type; |
| 2280 | reg_prot_offset *= cfi->interleave * cfi->device_type; |
| 2281 | reg_fact_size *= cfi->interleave; |
| 2282 | reg_user_size *= cfi->interleave; |
| 2283 | |
| 2284 | if (user_regs) { |
| 2285 | groups = reg_user_groups; |
| 2286 | groupsize = reg_user_size; |
| 2287 | /* skip over factory reg area */ |
| 2288 | groupno = reg_fact_groups; |
| 2289 | data_offset += reg_fact_groups * reg_fact_size; |
| 2290 | } else { |
| 2291 | groups = reg_fact_groups; |
| 2292 | groupsize = reg_fact_size; |
| 2293 | groupno = 0; |
| 2294 | } |
| 2295 | |
Nicolas Pitre | 332d71f | 2005-02-17 20:35:04 +0000 | [diff] [blame] | 2296 | while (len > 0 && groups > 0) { |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2297 | if (!action) { |
| 2298 | /* |
| 2299 | * Special case: if action is NULL |
| 2300 | * we fill buf with otp_info records. |
| 2301 | */ |
| 2302 | struct otp_info *otpinfo; |
| 2303 | map_word lockword; |
| 2304 | len -= sizeof(struct otp_info); |
| 2305 | if (len <= 0) |
| 2306 | return -ENOSPC; |
| 2307 | ret = do_otp_read(map, chip, |
| 2308 | reg_prot_offset, |
| 2309 | (u_char *)&lockword, |
| 2310 | map_bankwidth(map), |
| 2311 | 0, 0, 0); |
| 2312 | if (ret) |
| 2313 | return ret; |
| 2314 | otpinfo = (struct otp_info *)buf; |
| 2315 | otpinfo->start = from; |
| 2316 | otpinfo->length = groupsize; |
| 2317 | otpinfo->locked = |
| 2318 | !map_word_bitsset(map, lockword, |
| 2319 | CMD(1 << groupno)); |
| 2320 | from += groupsize; |
| 2321 | buf += sizeof(*otpinfo); |
| 2322 | *retlen += sizeof(*otpinfo); |
| 2323 | } else if (from >= groupsize) { |
| 2324 | from -= groupsize; |
Nicolas Pitre | 332d71f | 2005-02-17 20:35:04 +0000 | [diff] [blame] | 2325 | data_offset += groupsize; |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2326 | } else { |
| 2327 | int size = groupsize; |
| 2328 | data_offset += from; |
| 2329 | size -= from; |
| 2330 | from = 0; |
| 2331 | if (size > len) |
| 2332 | size = len; |
| 2333 | ret = action(map, chip, data_offset, |
| 2334 | buf, size, reg_prot_offset, |
| 2335 | groupno, groupsize); |
| 2336 | if (ret < 0) |
| 2337 | return ret; |
| 2338 | buf += size; |
| 2339 | len -= size; |
| 2340 | *retlen += size; |
Nicolas Pitre | 332d71f | 2005-02-17 20:35:04 +0000 | [diff] [blame] | 2341 | data_offset += size; |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2342 | } |
| 2343 | groupno++; |
| 2344 | groups--; |
| 2345 | } |
| 2346 | |
| 2347 | /* next OTP region */ |
| 2348 | if (++field == extp->NumProtectionFields) |
| 2349 | break; |
| 2350 | reg_prot_offset = otp->ProtRegAddr; |
| 2351 | reg_fact_groups = otp->FactGroups; |
| 2352 | reg_fact_size = 1 << otp->FactProtRegSize; |
| 2353 | reg_user_groups = otp->UserGroups; |
| 2354 | reg_user_size = 1 << otp->UserProtRegSize; |
| 2355 | otp++; |
| 2356 | } |
| 2357 | } |
| 2358 | |
| 2359 | return 0; |
| 2360 | } |
| 2361 | |
| 2362 | static int cfi_intelext_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, |
| 2363 | size_t len, size_t *retlen, |
| 2364 | u_char *buf) |
| 2365 | { |
| 2366 | return cfi_intelext_otp_walk(mtd, from, len, retlen, |
| 2367 | buf, do_otp_read, 0); |
| 2368 | } |
| 2369 | |
| 2370 | static int cfi_intelext_read_user_prot_reg(struct mtd_info *mtd, loff_t from, |
| 2371 | size_t len, size_t *retlen, |
| 2372 | u_char *buf) |
| 2373 | { |
| 2374 | return cfi_intelext_otp_walk(mtd, from, len, retlen, |
| 2375 | buf, do_otp_read, 1); |
| 2376 | } |
| 2377 | |
| 2378 | static int cfi_intelext_write_user_prot_reg(struct mtd_info *mtd, loff_t from, |
| 2379 | size_t len, size_t *retlen, |
| 2380 | u_char *buf) |
| 2381 | { |
| 2382 | return cfi_intelext_otp_walk(mtd, from, len, retlen, |
| 2383 | buf, do_otp_write, 1); |
| 2384 | } |
| 2385 | |
| 2386 | static int cfi_intelext_lock_user_prot_reg(struct mtd_info *mtd, |
| 2387 | loff_t from, size_t len) |
| 2388 | { |
| 2389 | size_t retlen; |
| 2390 | return cfi_intelext_otp_walk(mtd, from, len, &retlen, |
| 2391 | NULL, do_otp_lock, 1); |
| 2392 | } |
| 2393 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2394 | static int cfi_intelext_get_fact_prot_info(struct mtd_info *mtd, |
Nicolas Pitre | f77814d | 2005-02-08 17:11:19 +0000 | [diff] [blame] | 2395 | struct otp_info *buf, size_t len) |
| 2396 | { |
| 2397 | size_t retlen; |
| 2398 | int ret; |
| 2399 | |
| 2400 | ret = cfi_intelext_otp_walk(mtd, 0, len, &retlen, (u_char *)buf, NULL, 0); |
| 2401 | return ret ? : retlen; |
| 2402 | } |
| 2403 | |
| 2404 | static int cfi_intelext_get_user_prot_info(struct mtd_info *mtd, |
| 2405 | struct otp_info *buf, size_t len) |
| 2406 | { |
| 2407 | size_t retlen; |
| 2408 | int ret; |
| 2409 | |
| 2410 | ret = cfi_intelext_otp_walk(mtd, 0, len, &retlen, (u_char *)buf, NULL, 1); |
| 2411 | return ret ? : retlen; |
| 2412 | } |
| 2413 | |
| 2414 | #endif |
| 2415 | |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 2416 | static void cfi_intelext_save_locks(struct mtd_info *mtd) |
| 2417 | { |
| 2418 | struct mtd_erase_region_info *region; |
| 2419 | int block, status, i; |
| 2420 | unsigned long adr; |
| 2421 | size_t len; |
| 2422 | |
| 2423 | for (i = 0; i < mtd->numeraseregions; i++) { |
| 2424 | region = &mtd->eraseregions[i]; |
| 2425 | if (!region->lockmap) |
| 2426 | continue; |
| 2427 | |
| 2428 | for (block = 0; block < region->numblocks; block++){ |
| 2429 | len = region->erasesize; |
| 2430 | adr = region->offset + block * len; |
| 2431 | |
| 2432 | status = cfi_varsize_frob(mtd, |
Ben Dooks | 029a9eb | 2007-05-28 20:11:37 +0100 | [diff] [blame] | 2433 | do_getlockstatus_oneblock, adr, len, NULL); |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 2434 | if (status) |
| 2435 | set_bit(block, region->lockmap); |
| 2436 | else |
| 2437 | clear_bit(block, region->lockmap); |
| 2438 | } |
| 2439 | } |
| 2440 | } |
| 2441 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2442 | static int cfi_intelext_suspend(struct mtd_info *mtd) |
| 2443 | { |
| 2444 | struct map_info *map = mtd->priv; |
| 2445 | struct cfi_private *cfi = map->fldrv_priv; |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 2446 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2447 | int i; |
| 2448 | struct flchip *chip; |
| 2449 | int ret = 0; |
| 2450 | |
Justin Treon | e619a75 | 2008-01-30 10:25:49 -0800 | [diff] [blame] | 2451 | if ((mtd->flags & MTD_POWERUP_LOCK) |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 2452 | && extp && (extp->FeatureSupport & (1 << 5))) |
| 2453 | cfi_intelext_save_locks(mtd); |
| 2454 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2455 | for (i=0; !ret && i<cfi->numchips; i++) { |
| 2456 | chip = &cfi->chips[i]; |
| 2457 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2458 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2459 | |
| 2460 | switch (chip->state) { |
| 2461 | case FL_READY: |
| 2462 | case FL_STATUS: |
| 2463 | case FL_CFI_QUERY: |
| 2464 | case FL_JEDEC_QUERY: |
| 2465 | if (chip->oldstate == FL_READY) { |
David Anders | a86aaa6 | 2006-10-19 19:33:19 +0300 | [diff] [blame] | 2466 | /* place the chip in a known state before suspend */ |
| 2467 | map_write(map, CMD(0xFF), cfi->chips[i].start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2468 | chip->oldstate = chip->state; |
| 2469 | chip->state = FL_PM_SUSPENDED; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2470 | /* No need to wake_up() on this state change - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2471 | * as the whole point is that nobody can do anything |
| 2472 | * with the chip now anyway. |
| 2473 | */ |
| 2474 | } else { |
| 2475 | /* There seems to be an operation pending. We must wait for it. */ |
| 2476 | printk(KERN_NOTICE "Flash device refused suspend due to pending operation (oldstate %d)\n", chip->oldstate); |
| 2477 | ret = -EAGAIN; |
| 2478 | } |
| 2479 | break; |
| 2480 | default: |
| 2481 | /* Should we actually wait? Once upon a time these routines weren't |
| 2482 | allowed to. Or should we return -EAGAIN, because the upper layers |
| 2483 | ought to have already shut down anything which was using the device |
| 2484 | anyway? The latter for now. */ |
Russell King | 342d3a9 | 2012-02-15 11:48:34 +0000 | [diff] [blame] | 2485 | printk(KERN_NOTICE "Flash device refused suspend due to active operation (state %d)\n", chip->state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2486 | ret = -EAGAIN; |
| 2487 | case FL_PM_SUSPENDED: |
| 2488 | break; |
| 2489 | } |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2490 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2491 | } |
| 2492 | |
| 2493 | /* Unlock the chips again */ |
| 2494 | |
| 2495 | if (ret) { |
| 2496 | for (i--; i >=0; i--) { |
| 2497 | chip = &cfi->chips[i]; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2498 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2499 | mutex_lock(&chip->mutex); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2500 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2501 | if (chip->state == FL_PM_SUSPENDED) { |
| 2502 | /* No need to force it into a known state here, |
| 2503 | because we're returning failure, and it didn't |
| 2504 | get power cycled */ |
| 2505 | chip->state = chip->oldstate; |
| 2506 | chip->oldstate = FL_READY; |
| 2507 | wake_up(&chip->wq); |
| 2508 | } |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2509 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2510 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2511 | } |
| 2512 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2513 | return ret; |
| 2514 | } |
| 2515 | |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 2516 | static void cfi_intelext_restore_locks(struct mtd_info *mtd) |
| 2517 | { |
| 2518 | struct mtd_erase_region_info *region; |
| 2519 | int block, i; |
| 2520 | unsigned long adr; |
| 2521 | size_t len; |
| 2522 | |
| 2523 | for (i = 0; i < mtd->numeraseregions; i++) { |
| 2524 | region = &mtd->eraseregions[i]; |
| 2525 | if (!region->lockmap) |
| 2526 | continue; |
| 2527 | |
Akinobu Mita | c527b41 | 2012-03-23 15:02:05 -0700 | [diff] [blame] | 2528 | for_each_clear_bit(block, region->lockmap, region->numblocks) { |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 2529 | len = region->erasesize; |
| 2530 | adr = region->offset + block * len; |
Akinobu Mita | c527b41 | 2012-03-23 15:02:05 -0700 | [diff] [blame] | 2531 | cfi_intelext_unlock(mtd, adr, len); |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 2532 | } |
| 2533 | } |
| 2534 | } |
| 2535 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2536 | static void cfi_intelext_resume(struct mtd_info *mtd) |
| 2537 | { |
| 2538 | struct map_info *map = mtd->priv; |
| 2539 | struct cfi_private *cfi = map->fldrv_priv; |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 2540 | struct cfi_pri_intelext *extp = cfi->cmdset_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2541 | int i; |
| 2542 | struct flchip *chip; |
| 2543 | |
| 2544 | for (i=0; i<cfi->numchips; i++) { |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2545 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2546 | chip = &cfi->chips[i]; |
| 2547 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2548 | mutex_lock(&chip->mutex); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2549 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2550 | /* Go to known state. Chip may have been power cycled */ |
| 2551 | if (chip->state == FL_PM_SUSPENDED) { |
| 2552 | map_write(map, CMD(0xFF), cfi->chips[i].start); |
| 2553 | chip->oldstate = chip->state = FL_READY; |
| 2554 | wake_up(&chip->wq); |
| 2555 | } |
| 2556 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2557 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2558 | } |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 2559 | |
Justin Treon | e619a75 | 2008-01-30 10:25:49 -0800 | [diff] [blame] | 2560 | if ((mtd->flags & MTD_POWERUP_LOCK) |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 2561 | && extp && (extp->FeatureSupport & (1 << 5))) |
| 2562 | cfi_intelext_restore_locks(mtd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2563 | } |
| 2564 | |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 2565 | static int cfi_intelext_reset(struct mtd_info *mtd) |
| 2566 | { |
| 2567 | struct map_info *map = mtd->priv; |
| 2568 | struct cfi_private *cfi = map->fldrv_priv; |
| 2569 | int i, ret; |
| 2570 | |
| 2571 | for (i=0; i < cfi->numchips; i++) { |
| 2572 | struct flchip *chip = &cfi->chips[i]; |
| 2573 | |
| 2574 | /* force the completion of any ongoing operation |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2575 | and switch to array mode so any bootloader in |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 2576 | flash is accessible for soft reboot. */ |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2577 | mutex_lock(&chip->mutex); |
Kevin Hao | c4a9f88 | 2007-10-02 13:56:04 -0700 | [diff] [blame] | 2578 | ret = get_chip(map, chip, chip->start, FL_SHUTDOWN); |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 2579 | if (!ret) { |
| 2580 | map_write(map, CMD(0xff), chip->start); |
Kevin Hao | c4a9f88 | 2007-10-02 13:56:04 -0700 | [diff] [blame] | 2581 | chip->state = FL_SHUTDOWN; |
Nicolas Pitre | c9f7ec3 | 2009-10-23 16:02:42 -0400 | [diff] [blame] | 2582 | put_chip(map, chip, chip->start); |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 2583 | } |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2584 | mutex_unlock(&chip->mutex); |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 2585 | } |
| 2586 | |
| 2587 | return 0; |
| 2588 | } |
| 2589 | |
| 2590 | static int cfi_intelext_reboot(struct notifier_block *nb, unsigned long val, |
| 2591 | void *v) |
| 2592 | { |
| 2593 | struct mtd_info *mtd; |
| 2594 | |
| 2595 | mtd = container_of(nb, struct mtd_info, reboot_notifier); |
| 2596 | cfi_intelext_reset(mtd); |
| 2597 | return NOTIFY_DONE; |
| 2598 | } |
| 2599 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2600 | static void cfi_intelext_destroy(struct mtd_info *mtd) |
| 2601 | { |
| 2602 | struct map_info *map = mtd->priv; |
| 2603 | struct cfi_private *cfi = map->fldrv_priv; |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 2604 | struct mtd_erase_region_info *region; |
| 2605 | int i; |
Nicolas Pitre | 963a6fb | 2005-04-01 02:59:56 +0100 | [diff] [blame] | 2606 | cfi_intelext_reset(mtd); |
| 2607 | unregister_reboot_notifier(&mtd->reboot_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2608 | kfree(cfi->cmdset_priv); |
| 2609 | kfree(cfi->cfiq); |
| 2610 | kfree(cfi->chips[0].priv); |
| 2611 | kfree(cfi); |
Rodolfo Giometti | 0ecbc81 | 2007-03-26 21:45:43 -0800 | [diff] [blame] | 2612 | for (i = 0; i < mtd->numeraseregions; i++) { |
| 2613 | region = &mtd->eraseregions[i]; |
| 2614 | if (region->lockmap) |
| 2615 | kfree(region->lockmap); |
| 2616 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2617 | kfree(mtd->eraseregions); |
| 2618 | } |
| 2619 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2620 | MODULE_LICENSE("GPL"); |
| 2621 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org> et al."); |
| 2622 | MODULE_DESCRIPTION("MTD chip driver for Intel/Sharp flash chips"); |
David Woodhouse | a15bdee | 2006-05-08 22:35:05 +0100 | [diff] [blame] | 2623 | MODULE_ALIAS("cfi_cmdset_0003"); |
| 2624 | MODULE_ALIAS("cfi_cmdset_0200"); |