Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Common Flash Interface support: |
| 3 | * AMD & Fujitsu Standard Vendor Command Set (ID 0x0002) |
| 4 | * |
| 5 | * Copyright (C) 2000 Crossnet Co. <info@crossnet.co.jp> |
| 6 | * Copyright (C) 2004 Arcom Control Systems Ltd <linux@arcom.com> |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 7 | * Copyright (C) 2005 MontaVista Software Inc. <source@mvista.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * |
| 9 | * 2_by_8 routines added by Simon Munton |
| 10 | * |
| 11 | * 4_by_16 work by Carolyn J. Smith |
| 12 | * |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 13 | * XIP support hooks by Vitaly Wool (based on code for Intel flash |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 14 | * by Nicolas Pitre) |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 15 | * |
Christopher Moore | 87e92c0 | 2008-10-17 05:32:22 +0200 | [diff] [blame] | 16 | * 25/09/2008 Christopher Moore: TopBottom fixup for many Macronix with CFI V1.0 |
| 17 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | * Occasionally maintained by Thayne Harbaugh tharbaugh at lnxi dot com |
| 19 | * |
| 20 | * This code is GPL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | */ |
| 22 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/module.h> |
| 24 | #include <linux/types.h> |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <asm/io.h> |
| 28 | #include <asm/byteorder.h> |
| 29 | |
| 30 | #include <linux/errno.h> |
| 31 | #include <linux/slab.h> |
| 32 | #include <linux/delay.h> |
| 33 | #include <linux/interrupt.h> |
Kevin Cernekee | eafe131 | 2010-04-29 10:26:56 -0700 | [diff] [blame] | 34 | #include <linux/reboot.h> |
Stefan Roese | 1648eaa | 2013-01-18 13:10:05 +0100 | [diff] [blame] | 35 | #include <linux/of.h> |
| 36 | #include <linux/of_platform.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/mtd/map.h> |
| 38 | #include <linux/mtd/mtd.h> |
| 39 | #include <linux/mtd/cfi.h> |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 40 | #include <linux/mtd/xip.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | #define AMD_BOOTLOC_BUG |
| 43 | #define FORCE_WORD_WRITE 0 |
| 44 | |
| 45 | #define MAX_WORD_RETRIES 3 |
| 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #define SST49LF004B 0x0060 |
Ryan Jackson | 89072ef | 2006-10-20 14:41:03 -0700 | [diff] [blame] | 48 | #define SST49LF040B 0x0050 |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame] | 49 | #define SST49LF008A 0x005a |
Haavard Skinnemoen | 0165508 | 2006-08-09 11:06:07 +0200 | [diff] [blame] | 50 | #define AT49BV6416 0x00d6 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
| 52 | static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); |
| 53 | static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); |
| 54 | static int cfi_amdstd_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); |
| 55 | static int cfi_amdstd_erase_chip(struct mtd_info *, struct erase_info *); |
| 56 | static int cfi_amdstd_erase_varsize(struct mtd_info *, struct erase_info *); |
| 57 | static void cfi_amdstd_sync (struct mtd_info *); |
| 58 | static int cfi_amdstd_suspend (struct mtd_info *); |
| 59 | static void cfi_amdstd_resume (struct mtd_info *); |
Kevin Cernekee | eafe131 | 2010-04-29 10:26:56 -0700 | [diff] [blame] | 60 | static int cfi_amdstd_reboot(struct notifier_block *, unsigned long, void *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | static int cfi_amdstd_secsi_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); |
| 62 | |
Ira W. Snyder | 30ec5a2 | 2012-01-06 11:29:19 -0800 | [diff] [blame] | 63 | static int cfi_amdstd_panic_write(struct mtd_info *mtd, loff_t to, size_t len, |
| 64 | size_t *retlen, const u_char *buf); |
| 65 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | static void cfi_amdstd_destroy(struct mtd_info *); |
| 67 | |
| 68 | struct mtd_info *cfi_cmdset_0002(struct map_info *, int); |
| 69 | static struct mtd_info *cfi_amdstd_setup (struct mtd_info *); |
| 70 | |
| 71 | static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode); |
| 72 | static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr); |
| 73 | #include "fwh_lock.h" |
| 74 | |
Adrian Hunter | 69423d9 | 2008-12-10 13:37:21 +0000 | [diff] [blame] | 75 | static int cfi_atmel_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len); |
| 76 | static int cfi_atmel_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len); |
Haavard Skinnemoen | 0165508 | 2006-08-09 11:06:07 +0200 | [diff] [blame] | 77 | |
Stefan Roese | 1648eaa | 2013-01-18 13:10:05 +0100 | [diff] [blame] | 78 | static int cfi_ppb_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len); |
| 79 | static int cfi_ppb_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len); |
| 80 | static int cfi_ppb_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len); |
| 81 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | static struct mtd_chip_driver cfi_amdstd_chipdrv = { |
| 83 | .probe = NULL, /* Not usable directly */ |
| 84 | .destroy = cfi_amdstd_destroy, |
| 85 | .name = "cfi_cmdset_0002", |
| 86 | .module = THIS_MODULE |
| 87 | }; |
| 88 | |
| 89 | |
| 90 | /* #define DEBUG_CFI_FEATURES */ |
| 91 | |
| 92 | |
| 93 | #ifdef DEBUG_CFI_FEATURES |
| 94 | static void cfi_tell_features(struct cfi_pri_amdstd *extp) |
| 95 | { |
| 96 | const char* erase_suspend[3] = { |
| 97 | "Not supported", "Read only", "Read/write" |
| 98 | }; |
| 99 | const char* top_bottom[6] = { |
| 100 | "No WP", "8x8KiB sectors at top & bottom, no WP", |
| 101 | "Bottom boot", "Top boot", |
| 102 | "Uniform, Bottom WP", "Uniform, Top WP" |
| 103 | }; |
| 104 | |
| 105 | printk(" Silicon revision: %d\n", extp->SiliconRevision >> 1); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 106 | printk(" Address sensitive unlock: %s\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | (extp->SiliconRevision & 1) ? "Not required" : "Required"); |
| 108 | |
| 109 | if (extp->EraseSuspend < ARRAY_SIZE(erase_suspend)) |
| 110 | printk(" Erase Suspend: %s\n", erase_suspend[extp->EraseSuspend]); |
| 111 | else |
| 112 | printk(" Erase Suspend: Unknown value %d\n", extp->EraseSuspend); |
| 113 | |
| 114 | if (extp->BlkProt == 0) |
| 115 | printk(" Block protection: Not supported\n"); |
| 116 | else |
| 117 | printk(" Block protection: %d sectors per group\n", extp->BlkProt); |
| 118 | |
| 119 | |
| 120 | printk(" Temporary block unprotect: %s\n", |
| 121 | extp->TmpBlkUnprotect ? "Supported" : "Not supported"); |
| 122 | printk(" Block protect/unprotect scheme: %d\n", extp->BlkProtUnprot); |
| 123 | printk(" Number of simultaneous operations: %d\n", extp->SimultaneousOps); |
| 124 | printk(" Burst mode: %s\n", |
| 125 | extp->BurstMode ? "Supported" : "Not supported"); |
| 126 | if (extp->PageMode == 0) |
| 127 | printk(" Page mode: Not supported\n"); |
| 128 | else |
| 129 | printk(" Page mode: %d word page\n", extp->PageMode << 2); |
| 130 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 131 | printk(" Vpp Supply Minimum Program/Erase Voltage: %d.%d V\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | extp->VppMin >> 4, extp->VppMin & 0xf); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 133 | printk(" Vpp Supply Maximum Program/Erase Voltage: %d.%d V\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | extp->VppMax >> 4, extp->VppMax & 0xf); |
| 135 | |
| 136 | if (extp->TopBottom < ARRAY_SIZE(top_bottom)) |
| 137 | printk(" Top/Bottom Boot Block: %s\n", top_bottom[extp->TopBottom]); |
| 138 | else |
| 139 | printk(" Top/Bottom Boot Block: Unknown value %d\n", extp->TopBottom); |
| 140 | } |
| 141 | #endif |
| 142 | |
| 143 | #ifdef AMD_BOOTLOC_BUG |
| 144 | /* Wheee. Bring me the head of someone at AMD. */ |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 145 | static void fixup_amd_bootblock(struct mtd_info *mtd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | { |
| 147 | struct map_info *map = mtd->priv; |
| 148 | struct cfi_private *cfi = map->fldrv_priv; |
| 149 | struct cfi_pri_amdstd *extp = cfi->cmdset_priv; |
| 150 | __u8 major = extp->MajorVersion; |
| 151 | __u8 minor = extp->MinorVersion; |
| 152 | |
| 153 | if (((major << 8) | minor) < 0x3131) { |
| 154 | /* CFI version 1.0 => don't trust bootloc */ |
Christopher Moore | 87e92c0 | 2008-10-17 05:32:22 +0200 | [diff] [blame] | 155 | |
Brian Norris | 289c052 | 2011-07-19 10:06:09 -0700 | [diff] [blame] | 156 | pr_debug("%s: JEDEC Vendor ID is 0x%02X Device ID is 0x%02X\n", |
Christopher Moore | 87e92c0 | 2008-10-17 05:32:22 +0200 | [diff] [blame] | 157 | map->name, cfi->mfr, cfi->id); |
| 158 | |
| 159 | /* AFAICS all 29LV400 with a bottom boot block have a device ID |
| 160 | * of 0x22BA in 16-bit mode and 0xBA in 8-bit mode. |
| 161 | * These were badly detected as they have the 0x80 bit set |
| 162 | * so treat them as a special case. |
| 163 | */ |
| 164 | if (((cfi->id == 0xBA) || (cfi->id == 0x22BA)) && |
| 165 | |
| 166 | /* Macronix added CFI to their 2nd generation |
| 167 | * MX29LV400C B/T but AFAICS no other 29LV400 (AMD, |
| 168 | * Fujitsu, Spansion, EON, ESI and older Macronix) |
| 169 | * has CFI. |
| 170 | * |
| 171 | * Therefore also check the manufacturer. |
| 172 | * This reduces the risk of false detection due to |
| 173 | * the 8-bit device ID. |
| 174 | */ |
Guillaume LECERF | f3e69c6 | 2009-12-15 23:01:06 +0100 | [diff] [blame] | 175 | (cfi->mfr == CFI_MFR_MACRONIX)) { |
Brian Norris | 289c052 | 2011-07-19 10:06:09 -0700 | [diff] [blame] | 176 | pr_debug("%s: Macronix MX29LV400C with bottom boot block" |
Christopher Moore | 87e92c0 | 2008-10-17 05:32:22 +0200 | [diff] [blame] | 177 | " detected\n", map->name); |
| 178 | extp->TopBottom = 2; /* bottom boot */ |
| 179 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | if (cfi->id & 0x80) { |
| 181 | printk(KERN_WARNING "%s: JEDEC Device ID is 0x%02X. Assuming broken CFI table.\n", map->name, cfi->id); |
| 182 | extp->TopBottom = 3; /* top boot */ |
| 183 | } else { |
| 184 | extp->TopBottom = 2; /* bottom boot */ |
| 185 | } |
Christopher Moore | 87e92c0 | 2008-10-17 05:32:22 +0200 | [diff] [blame] | 186 | |
Brian Norris | 289c052 | 2011-07-19 10:06:09 -0700 | [diff] [blame] | 187 | pr_debug("%s: AMD CFI PRI V%c.%c has no boot block field;" |
Christopher Moore | 87e92c0 | 2008-10-17 05:32:22 +0200 | [diff] [blame] | 188 | " deduced %s from Device ID\n", map->name, major, minor, |
| 189 | extp->TopBottom == 2 ? "bottom" : "top"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | } |
| 191 | } |
| 192 | #endif |
| 193 | |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 194 | static void fixup_use_write_buffers(struct mtd_info *mtd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | { |
| 196 | struct map_info *map = mtd->priv; |
| 197 | struct cfi_private *cfi = map->fldrv_priv; |
| 198 | if (cfi->cfiq->BufWriteTimeoutTyp) { |
Brian Norris | 289c052 | 2011-07-19 10:06:09 -0700 | [diff] [blame] | 199 | pr_debug("Using buffer write method\n" ); |
Artem Bityutskiy | 3c3c10b | 2012-01-30 14:58:32 +0200 | [diff] [blame] | 200 | mtd->_write = cfi_amdstd_write_buffers; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | } |
| 202 | } |
| 203 | |
Haavard Skinnemoen | 5b0c5c2 | 2006-08-09 10:54:44 +0200 | [diff] [blame] | 204 | /* Atmel chips don't use the same PRI format as AMD chips */ |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 205 | static void fixup_convert_atmel_pri(struct mtd_info *mtd) |
Haavard Skinnemoen | 5b0c5c2 | 2006-08-09 10:54:44 +0200 | [diff] [blame] | 206 | { |
| 207 | struct map_info *map = mtd->priv; |
| 208 | struct cfi_private *cfi = map->fldrv_priv; |
| 209 | struct cfi_pri_amdstd *extp = cfi->cmdset_priv; |
| 210 | struct cfi_pri_atmel atmel_pri; |
| 211 | |
| 212 | memcpy(&atmel_pri, extp, sizeof(atmel_pri)); |
HÃ¥vard Skinnemoen | de591da | 2006-09-15 17:19:31 +0200 | [diff] [blame] | 213 | memset((char *)extp + 5, 0, sizeof(*extp) - 5); |
Haavard Skinnemoen | 5b0c5c2 | 2006-08-09 10:54:44 +0200 | [diff] [blame] | 214 | |
| 215 | if (atmel_pri.Features & 0x02) |
| 216 | extp->EraseSuspend = 2; |
| 217 | |
Haavard Skinnemoen | be8f78b | 2008-09-30 13:55:33 +0200 | [diff] [blame] | 218 | /* Some chips got it backwards... */ |
| 219 | if (cfi->id == AT49BV6416) { |
| 220 | if (atmel_pri.BottomBoot) |
| 221 | extp->TopBottom = 3; |
| 222 | else |
| 223 | extp->TopBottom = 2; |
| 224 | } else { |
| 225 | if (atmel_pri.BottomBoot) |
| 226 | extp->TopBottom = 2; |
| 227 | else |
| 228 | extp->TopBottom = 3; |
| 229 | } |
Hans-Christian Egtvedt | d10a39d | 2007-10-30 16:33:07 +0100 | [diff] [blame] | 230 | |
| 231 | /* burst write mode not supported */ |
| 232 | cfi->cfiq->BufWriteTimeoutTyp = 0; |
| 233 | cfi->cfiq->BufWriteTimeoutMax = 0; |
Haavard Skinnemoen | 5b0c5c2 | 2006-08-09 10:54:44 +0200 | [diff] [blame] | 234 | } |
| 235 | |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 236 | static void fixup_use_secsi(struct mtd_info *mtd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | { |
| 238 | /* Setup for chips with a secsi area */ |
Artem Bityutskiy | 3c3c10b | 2012-01-30 14:58:32 +0200 | [diff] [blame] | 239 | mtd->_read_user_prot_reg = cfi_amdstd_secsi_read; |
| 240 | mtd->_read_fact_prot_reg = cfi_amdstd_secsi_read; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | } |
| 242 | |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 243 | static void fixup_use_erase_chip(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; |
| 247 | if ((cfi->cfiq->NumEraseRegions == 1) && |
| 248 | ((cfi->cfiq->EraseRegionInfo[0] & 0xffff) == 0)) { |
Artem Bityutskiy | 3c3c10b | 2012-01-30 14:58:32 +0200 | [diff] [blame] | 249 | mtd->_erase = cfi_amdstd_erase_chip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 251 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | } |
| 253 | |
Haavard Skinnemoen | 0165508 | 2006-08-09 11:06:07 +0200 | [diff] [blame] | 254 | /* |
| 255 | * Some Atmel chips (e.g. the AT49BV6416) power-up with all sectors |
| 256 | * locked by default. |
| 257 | */ |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 258 | static void fixup_use_atmel_lock(struct mtd_info *mtd) |
Haavard Skinnemoen | 0165508 | 2006-08-09 11:06:07 +0200 | [diff] [blame] | 259 | { |
Artem Bityutskiy | 3c3c10b | 2012-01-30 14:58:32 +0200 | [diff] [blame] | 260 | mtd->_lock = cfi_atmel_lock; |
| 261 | mtd->_unlock = cfi_atmel_unlock; |
Justin Treon | e619a75 | 2008-01-30 10:25:49 -0800 | [diff] [blame] | 262 | mtd->flags |= MTD_POWERUP_LOCK; |
Haavard Skinnemoen | 0165508 | 2006-08-09 11:06:07 +0200 | [diff] [blame] | 263 | } |
| 264 | |
Guillaume LECERF | 83dcd3b | 2010-04-24 17:58:22 +0200 | [diff] [blame] | 265 | static void fixup_old_sst_eraseregion(struct mtd_info *mtd) |
| 266 | { |
| 267 | struct map_info *map = mtd->priv; |
| 268 | struct cfi_private *cfi = map->fldrv_priv; |
| 269 | |
| 270 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 271 | * These flashes report two separate eraseblock regions based on the |
Guillaume LECERF | 83dcd3b | 2010-04-24 17:58:22 +0200 | [diff] [blame] | 272 | * sector_erase-size and block_erase-size, although they both operate on the |
| 273 | * same memory. This is not allowed according to CFI, so we just pick the |
| 274 | * sector_erase-size. |
| 275 | */ |
| 276 | cfi->cfiq->NumEraseRegions = 1; |
| 277 | } |
| 278 | |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 279 | static void fixup_sst39vf(struct mtd_info *mtd) |
Guillaume LECERF | 83dcd3b | 2010-04-24 17:58:22 +0200 | [diff] [blame] | 280 | { |
| 281 | struct map_info *map = mtd->priv; |
| 282 | struct cfi_private *cfi = map->fldrv_priv; |
| 283 | |
| 284 | fixup_old_sst_eraseregion(mtd); |
| 285 | |
| 286 | cfi->addr_unlock1 = 0x5555; |
| 287 | cfi->addr_unlock2 = 0x2AAA; |
| 288 | } |
| 289 | |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 290 | static void fixup_sst39vf_rev_b(struct mtd_info *mtd) |
Guillaume LECERF | 5a0563f | 2010-04-24 17:58:27 +0200 | [diff] [blame] | 291 | { |
| 292 | struct map_info *map = mtd->priv; |
| 293 | struct cfi_private *cfi = map->fldrv_priv; |
| 294 | |
| 295 | fixup_old_sst_eraseregion(mtd); |
| 296 | |
| 297 | cfi->addr_unlock1 = 0x555; |
| 298 | cfi->addr_unlock2 = 0x2AA; |
Guillaume LECERF | 0896804 | 2010-10-26 10:45:23 +0100 | [diff] [blame] | 299 | |
| 300 | cfi->sector_erase_cmd = CMD(0x50); |
Guillaume LECERF | 5a0563f | 2010-04-24 17:58:27 +0200 | [diff] [blame] | 301 | } |
| 302 | |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 303 | static void fixup_sst38vf640x_sectorsize(struct mtd_info *mtd) |
Guillaume LECERF | 9fc05fc | 2010-10-26 11:31:55 +0100 | [diff] [blame] | 304 | { |
| 305 | struct map_info *map = mtd->priv; |
| 306 | struct cfi_private *cfi = map->fldrv_priv; |
| 307 | |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 308 | fixup_sst39vf_rev_b(mtd); |
Guillaume LECERF | 9fc05fc | 2010-10-26 11:31:55 +0100 | [diff] [blame] | 309 | |
| 310 | /* |
| 311 | * CFI reports 1024 sectors (0x03ff+1) of 64KBytes (0x0100*256) where |
| 312 | * it should report a size of 8KBytes (0x0020*256). |
| 313 | */ |
| 314 | cfi->cfiq->EraseRegionInfo[0] = 0x002003ff; |
| 315 | pr_warning("%s: Bad 38VF640x CFI data; adjusting sector size from 64 to 8KiB\n", mtd->name); |
| 316 | } |
| 317 | |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 318 | static void fixup_s29gl064n_sectors(struct mtd_info *mtd) |
Trent Piepho | 70b0725 | 2008-03-30 21:19:30 -0700 | [diff] [blame] | 319 | { |
| 320 | struct map_info *map = mtd->priv; |
| 321 | struct cfi_private *cfi = map->fldrv_priv; |
| 322 | |
| 323 | if ((cfi->cfiq->EraseRegionInfo[0] & 0xffff) == 0x003f) { |
| 324 | cfi->cfiq->EraseRegionInfo[0] |= 0x0040; |
David Woodhouse | 5df41de | 2012-05-13 23:34:24 -0500 | [diff] [blame] | 325 | pr_warning("%s: Bad S29GL064N CFI data; adjust from 64 to 128 sectors\n", mtd->name); |
Trent Piepho | 70b0725 | 2008-03-30 21:19:30 -0700 | [diff] [blame] | 326 | } |
| 327 | } |
| 328 | |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 329 | static void fixup_s29gl032n_sectors(struct mtd_info *mtd) |
Trent Piepho | 70b0725 | 2008-03-30 21:19:30 -0700 | [diff] [blame] | 330 | { |
| 331 | struct map_info *map = mtd->priv; |
| 332 | struct cfi_private *cfi = map->fldrv_priv; |
| 333 | |
| 334 | if ((cfi->cfiq->EraseRegionInfo[1] & 0xffff) == 0x007e) { |
| 335 | cfi->cfiq->EraseRegionInfo[1] &= ~0x0040; |
David Woodhouse | 5df41de | 2012-05-13 23:34:24 -0500 | [diff] [blame] | 336 | pr_warning("%s: Bad S29GL032N CFI data; adjust from 127 to 63 sectors\n", mtd->name); |
Trent Piepho | 70b0725 | 2008-03-30 21:19:30 -0700 | [diff] [blame] | 337 | } |
| 338 | } |
| 339 | |
Javier Martin | 43dc03c | 2012-05-11 12:15:41 +0200 | [diff] [blame] | 340 | static void fixup_s29ns512p_sectors(struct mtd_info *mtd) |
| 341 | { |
| 342 | struct map_info *map = mtd->priv; |
| 343 | struct cfi_private *cfi = map->fldrv_priv; |
| 344 | |
| 345 | /* |
| 346 | * S29NS512P flash uses more than 8bits to report number of sectors, |
| 347 | * which is not permitted by CFI. |
| 348 | */ |
| 349 | cfi->cfiq->EraseRegionInfo[0] = 0x020001ff; |
David Woodhouse | 5df41de | 2012-05-13 23:34:24 -0500 | [diff] [blame] | 350 | pr_warning("%s: Bad S29NS512P CFI data; adjust to 512 sectors\n", mtd->name); |
Javier Martin | 43dc03c | 2012-05-11 12:15:41 +0200 | [diff] [blame] | 351 | } |
| 352 | |
Guillaume LECERF | 83dcd3b | 2010-04-24 17:58:22 +0200 | [diff] [blame] | 353 | /* Used to fix CFI-Tables of chips without Extended Query Tables */ |
| 354 | static struct cfi_fixup cfi_nopri_fixup_table[] = { |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 355 | { CFI_MFR_SST, 0x234a, fixup_sst39vf }, /* SST39VF1602 */ |
| 356 | { CFI_MFR_SST, 0x234b, fixup_sst39vf }, /* SST39VF1601 */ |
| 357 | { CFI_MFR_SST, 0x235a, fixup_sst39vf }, /* SST39VF3202 */ |
| 358 | { CFI_MFR_SST, 0x235b, fixup_sst39vf }, /* SST39VF3201 */ |
| 359 | { CFI_MFR_SST, 0x235c, fixup_sst39vf_rev_b }, /* SST39VF3202B */ |
| 360 | { CFI_MFR_SST, 0x235d, fixup_sst39vf_rev_b }, /* SST39VF3201B */ |
| 361 | { CFI_MFR_SST, 0x236c, fixup_sst39vf_rev_b }, /* SST39VF6402B */ |
| 362 | { CFI_MFR_SST, 0x236d, fixup_sst39vf_rev_b }, /* SST39VF6401B */ |
| 363 | { 0, 0, NULL } |
Guillaume LECERF | 83dcd3b | 2010-04-24 17:58:22 +0200 | [diff] [blame] | 364 | }; |
| 365 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | static struct cfi_fixup cfi_fixup_table[] = { |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 367 | { CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | #ifdef AMD_BOOTLOC_BUG |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 369 | { CFI_MFR_AMD, CFI_ID_ANY, fixup_amd_bootblock }, |
Steffen Sledz | 1065cda | 2011-03-10 09:05:12 +0100 | [diff] [blame] | 370 | { CFI_MFR_AMIC, CFI_ID_ANY, fixup_amd_bootblock }, |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 371 | { CFI_MFR_MACRONIX, CFI_ID_ANY, fixup_amd_bootblock }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | #endif |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 373 | { CFI_MFR_AMD, 0x0050, fixup_use_secsi }, |
| 374 | { CFI_MFR_AMD, 0x0053, fixup_use_secsi }, |
| 375 | { CFI_MFR_AMD, 0x0055, fixup_use_secsi }, |
| 376 | { CFI_MFR_AMD, 0x0056, fixup_use_secsi }, |
| 377 | { CFI_MFR_AMD, 0x005C, fixup_use_secsi }, |
| 378 | { CFI_MFR_AMD, 0x005F, fixup_use_secsi }, |
| 379 | { CFI_MFR_AMD, 0x0c01, fixup_s29gl064n_sectors }, |
| 380 | { CFI_MFR_AMD, 0x1301, fixup_s29gl064n_sectors }, |
| 381 | { CFI_MFR_AMD, 0x1a00, fixup_s29gl032n_sectors }, |
| 382 | { CFI_MFR_AMD, 0x1a01, fixup_s29gl032n_sectors }, |
Javier Martin | 43dc03c | 2012-05-11 12:15:41 +0200 | [diff] [blame] | 383 | { CFI_MFR_AMD, 0x3f00, fixup_s29ns512p_sectors }, |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 384 | { CFI_MFR_SST, 0x536a, fixup_sst38vf640x_sectorsize }, /* SST38VF6402 */ |
| 385 | { CFI_MFR_SST, 0x536b, fixup_sst38vf640x_sectorsize }, /* SST38VF6401 */ |
| 386 | { CFI_MFR_SST, 0x536c, fixup_sst38vf640x_sectorsize }, /* SST38VF6404 */ |
| 387 | { CFI_MFR_SST, 0x536d, fixup_sst38vf640x_sectorsize }, /* SST38VF6403 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | #if !FORCE_WORD_WRITE |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 389 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | #endif |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 391 | { 0, 0, NULL } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | }; |
| 393 | static struct cfi_fixup jedec_fixup_table[] = { |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 394 | { CFI_MFR_SST, SST49LF004B, fixup_use_fwh_lock }, |
| 395 | { CFI_MFR_SST, SST49LF040B, fixup_use_fwh_lock }, |
| 396 | { CFI_MFR_SST, SST49LF008A, fixup_use_fwh_lock }, |
| 397 | { 0, 0, NULL } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | }; |
| 399 | |
| 400 | static struct cfi_fixup fixup_table[] = { |
| 401 | /* The CFI vendor ids and the JEDEC vendor IDs appear |
| 402 | * to be common. It is like the devices id's are as |
| 403 | * well. This table is to pick all cases where |
| 404 | * we know that is the case. |
| 405 | */ |
Guillaume LECERF | cc31822 | 2010-11-17 12:35:50 +0100 | [diff] [blame] | 406 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_erase_chip }, |
| 407 | { CFI_MFR_ATMEL, AT49BV6416, fixup_use_atmel_lock }, |
| 408 | { 0, 0, NULL } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | }; |
| 410 | |
| 411 | |
Wolfgang Grandegger | fefae48 | 2009-01-08 19:21:27 +0100 | [diff] [blame] | 412 | static void cfi_fixup_major_minor(struct cfi_private *cfi, |
| 413 | struct cfi_pri_amdstd *extp) |
| 414 | { |
Guillaume LECERF | e637276 | 2010-12-17 10:59:41 +0100 | [diff] [blame] | 415 | if (cfi->mfr == CFI_MFR_SAMSUNG) { |
Guillaume LECERF | e8953b7 | 2010-12-17 10:59:47 +0100 | [diff] [blame] | 416 | if ((extp->MajorVersion == '0' && extp->MinorVersion == '0') || |
| 417 | (extp->MajorVersion == '3' && extp->MinorVersion == '3')) { |
Guillaume LECERF | e637276 | 2010-12-17 10:59:41 +0100 | [diff] [blame] | 418 | /* |
| 419 | * Samsung K8P2815UQB and K8D6x16UxM chips |
| 420 | * report major=0 / minor=0. |
Guillaume LECERF | e8953b7 | 2010-12-17 10:59:47 +0100 | [diff] [blame] | 421 | * K8D3x16UxC chips report major=3 / minor=3. |
Guillaume LECERF | e637276 | 2010-12-17 10:59:41 +0100 | [diff] [blame] | 422 | */ |
| 423 | printk(KERN_NOTICE " Fixing Samsung's Amd/Fujitsu" |
| 424 | " Extended Query version to 1.%c\n", |
| 425 | extp->MinorVersion); |
| 426 | extp->MajorVersion = '1'; |
| 427 | } |
| 428 | } |
| 429 | |
Guillaume LECERF | 9fc05fc | 2010-10-26 11:31:55 +0100 | [diff] [blame] | 430 | /* |
| 431 | * SST 38VF640x chips report major=0xFF / minor=0xFF. |
| 432 | */ |
| 433 | if (cfi->mfr == CFI_MFR_SST && (cfi->id >> 4) == 0x0536) { |
| 434 | extp->MajorVersion = '1'; |
| 435 | extp->MinorVersion = '0'; |
| 436 | } |
Wolfgang Grandegger | fefae48 | 2009-01-08 19:21:27 +0100 | [diff] [blame] | 437 | } |
| 438 | |
Gerlando Falauto | 4209628 | 2012-07-03 09:09:47 +0200 | [diff] [blame] | 439 | static int is_m29ew(struct cfi_private *cfi) |
| 440 | { |
| 441 | if (cfi->mfr == CFI_MFR_INTEL && |
| 442 | ((cfi->device_type == CFI_DEVICETYPE_X8 && (cfi->id & 0xff) == 0x7e) || |
| 443 | (cfi->device_type == CFI_DEVICETYPE_X16 && cfi->id == 0x227e))) |
| 444 | return 1; |
| 445 | return 0; |
| 446 | } |
| 447 | |
| 448 | /* |
| 449 | * From TN-13-07: Patching the Linux Kernel and U-Boot for M29 Flash, page 20: |
| 450 | * Some revisions of the M29EW suffer from erase suspend hang ups. In |
| 451 | * particular, it can occur when the sequence |
| 452 | * Erase Confirm -> Suspend -> Program -> Resume |
| 453 | * causes a lockup due to internal timing issues. The consequence is that the |
| 454 | * erase cannot be resumed without inserting a dummy command after programming |
| 455 | * and prior to resuming. [...] The work-around is to issue a dummy write cycle |
| 456 | * that writes an F0 command code before the RESUME command. |
| 457 | */ |
| 458 | static void cfi_fixup_m29ew_erase_suspend(struct map_info *map, |
| 459 | unsigned long adr) |
| 460 | { |
| 461 | struct cfi_private *cfi = map->fldrv_priv; |
| 462 | /* before resume, insert a dummy 0xF0 cycle for Micron M29EW devices */ |
| 463 | if (is_m29ew(cfi)) |
| 464 | map_write(map, CMD(0xF0), adr); |
| 465 | } |
| 466 | |
| 467 | /* |
| 468 | * From TN-13-07: Patching the Linux Kernel and U-Boot for M29 Flash, page 22: |
| 469 | * |
| 470 | * Some revisions of the M29EW (for example, A1 and A2 step revisions) |
| 471 | * are affected by a problem that could cause a hang up when an ERASE SUSPEND |
| 472 | * command is issued after an ERASE RESUME operation without waiting for a |
| 473 | * minimum delay. The result is that once the ERASE seems to be completed |
| 474 | * (no bits are toggling), the contents of the Flash memory block on which |
| 475 | * the erase was ongoing could be inconsistent with the expected values |
| 476 | * (typically, the array value is stuck to the 0xC0, 0xC4, 0x80, or 0x84 |
| 477 | * values), causing a consequent failure of the ERASE operation. |
| 478 | * The occurrence of this issue could be high, especially when file system |
| 479 | * operations on the Flash are intensive. As a result, it is recommended |
| 480 | * that a patch be applied. Intensive file system operations can cause many |
| 481 | * calls to the garbage routine to free Flash space (also by erasing physical |
| 482 | * Flash blocks) and as a result, many consecutive SUSPEND and RESUME |
| 483 | * commands can occur. The problem disappears when a delay is inserted after |
| 484 | * the RESUME command by using the udelay() function available in Linux. |
| 485 | * The DELAY value must be tuned based on the customer's platform. |
| 486 | * The maximum value that fixes the problem in all cases is 500us. |
| 487 | * But, in our experience, a delay of 30 µs to 50 µs is sufficient |
| 488 | * in most cases. |
| 489 | * We have chosen 500µs because this latency is acceptable. |
| 490 | */ |
| 491 | static void cfi_fixup_m29ew_delay_after_resume(struct cfi_private *cfi) |
| 492 | { |
| 493 | /* |
| 494 | * Resolving the Delay After Resume Issue see Micron TN-13-07 |
| 495 | * Worst case delay must be 500µs but 30-50µs should be ok as well |
| 496 | */ |
| 497 | if (is_m29ew(cfi)) |
| 498 | cfi_udelay(500); |
| 499 | } |
| 500 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | struct mtd_info *cfi_cmdset_0002(struct map_info *map, int primary) |
| 502 | { |
| 503 | struct cfi_private *cfi = map->fldrv_priv; |
Stefan Roese | 1648eaa | 2013-01-18 13:10:05 +0100 | [diff] [blame] | 504 | struct device_node __maybe_unused *np = map->device_node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | struct mtd_info *mtd; |
| 506 | int i; |
| 507 | |
Burman Yan | 95b93a0 | 2006-11-15 21:10:29 +0200 | [diff] [blame] | 508 | mtd = kzalloc(sizeof(*mtd), GFP_KERNEL); |
Jingoo Han | 5c8b1fb | 2014-02-06 15:19:35 +0900 | [diff] [blame^] | 509 | if (!mtd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | mtd->priv = map; |
| 512 | mtd->type = MTD_NORFLASH; |
| 513 | |
| 514 | /* Fill in the default mtd operations */ |
Artem Bityutskiy | 3c3c10b | 2012-01-30 14:58:32 +0200 | [diff] [blame] | 515 | mtd->_erase = cfi_amdstd_erase_varsize; |
| 516 | mtd->_write = cfi_amdstd_write_words; |
| 517 | mtd->_read = cfi_amdstd_read; |
| 518 | mtd->_sync = cfi_amdstd_sync; |
| 519 | mtd->_suspend = cfi_amdstd_suspend; |
| 520 | mtd->_resume = cfi_amdstd_resume; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | mtd->flags = MTD_CAP_NORFLASH; |
| 522 | mtd->name = map->name; |
Artem B. Bityutskiy | 783ed81 | 2006-06-14 19:53:44 +0400 | [diff] [blame] | 523 | mtd->writesize = 1; |
Anatolij Gustschin | 13ce77f | 2011-02-10 16:01:46 +0100 | [diff] [blame] | 524 | mtd->writebufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; |
Anatolij Gustschin | d261c72 | 2010-12-16 23:42:15 +0100 | [diff] [blame] | 525 | |
Brian Norris | 0a32a10 | 2011-07-19 10:06:10 -0700 | [diff] [blame] | 526 | pr_debug("MTD %s(): write buffer size %d\n", __func__, |
| 527 | mtd->writebufsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | |
Artem Bityutskiy | 3c3c10b | 2012-01-30 14:58:32 +0200 | [diff] [blame] | 529 | mtd->_panic_write = cfi_amdstd_panic_write; |
Kevin Cernekee | eafe131 | 2010-04-29 10:26:56 -0700 | [diff] [blame] | 530 | mtd->reboot_notifier.notifier_call = cfi_amdstd_reboot; |
| 531 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | if (cfi->cfi_mode==CFI_MODE_CFI){ |
| 533 | unsigned char bootloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR; |
| 535 | struct cfi_pri_amdstd *extp; |
| 536 | |
| 537 | extp = (struct cfi_pri_amdstd*)cfi_read_pri(map, adr, sizeof(*extp), "Amd/Fujitsu"); |
Guillaume LECERF | 564b849 | 2010-04-24 17:58:17 +0200 | [diff] [blame] | 538 | if (extp) { |
| 539 | /* |
| 540 | * It's a real CFI chip, not one for which the probe |
| 541 | * routine faked a CFI structure. |
| 542 | */ |
| 543 | cfi_fixup_major_minor(cfi, extp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | |
Guillaume LECERF | e17f47a | 2010-07-02 14:39:10 +0200 | [diff] [blame] | 545 | /* |
Gernot Hoyler | c9ddab2 | 2011-04-11 15:53:35 +0200 | [diff] [blame] | 546 | * Valid primary extension versions are: 1.0, 1.1, 1.2, 1.3, 1.4, 1.5 |
Justin P. Mattock | 631dd1a | 2010-10-18 11:03:14 +0200 | [diff] [blame] | 547 | * see: http://cs.ozerki.net/zap/pub/axim-x5/docs/cfi_r20.pdf, page 19 |
| 548 | * http://www.spansion.com/Support/AppNotes/cfi_100_20011201.pdf |
Guillaume LECERF | 5da1953 | 2010-08-05 13:55:24 +0200 | [diff] [blame] | 549 | * http://www.spansion.com/Support/Datasheets/s29ws-p_00_a12_e.pdf |
Gernot Hoyler | c9ddab2 | 2011-04-11 15:53:35 +0200 | [diff] [blame] | 550 | * http://www.spansion.com/Support/Datasheets/S29GL_128S_01GS_00_02_e.pdf |
Guillaume LECERF | e17f47a | 2010-07-02 14:39:10 +0200 | [diff] [blame] | 551 | */ |
Guillaume LECERF | 564b849 | 2010-04-24 17:58:17 +0200 | [diff] [blame] | 552 | if (extp->MajorVersion != '1' || |
Gernot Hoyler | c9ddab2 | 2011-04-11 15:53:35 +0200 | [diff] [blame] | 553 | (extp->MajorVersion == '1' && (extp->MinorVersion < '0' || extp->MinorVersion > '5'))) { |
Guillaume LECERF | 564b849 | 2010-04-24 17:58:17 +0200 | [diff] [blame] | 554 | printk(KERN_ERR " Unknown Amd/Fujitsu Extended Query " |
Guillaume LECERF | e17f47a | 2010-07-02 14:39:10 +0200 | [diff] [blame] | 555 | "version %c.%c (%#02x/%#02x).\n", |
| 556 | extp->MajorVersion, extp->MinorVersion, |
| 557 | extp->MajorVersion, extp->MinorVersion); |
Guillaume LECERF | 564b849 | 2010-04-24 17:58:17 +0200 | [diff] [blame] | 558 | kfree(extp); |
| 559 | kfree(mtd); |
| 560 | return NULL; |
| 561 | } |
Wolfgang Grandegger | fefae48 | 2009-01-08 19:21:27 +0100 | [diff] [blame] | 562 | |
Guillaume LECERF | e17f47a | 2010-07-02 14:39:10 +0200 | [diff] [blame] | 563 | printk(KERN_INFO " Amd/Fujitsu Extended Query version %c.%c.\n", |
| 564 | extp->MajorVersion, extp->MinorVersion); |
| 565 | |
Guillaume LECERF | 564b849 | 2010-04-24 17:58:17 +0200 | [diff] [blame] | 566 | /* Install our own private info structure */ |
| 567 | cfi->cmdset_priv = extp; |
Todd Poynor | d88f977 | 2005-07-20 22:01:17 +0100 | [diff] [blame] | 568 | |
Guillaume LECERF | 564b849 | 2010-04-24 17:58:17 +0200 | [diff] [blame] | 569 | /* Apply cfi device specific fixups */ |
| 570 | cfi_fixup(mtd, cfi_fixup_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | |
| 572 | #ifdef DEBUG_CFI_FEATURES |
Guillaume LECERF | 564b849 | 2010-04-24 17:58:17 +0200 | [diff] [blame] | 573 | /* Tell the user about it in lots of lovely detail */ |
| 574 | cfi_tell_features(extp); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 575 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | |
Stefan Roese | 1648eaa | 2013-01-18 13:10:05 +0100 | [diff] [blame] | 577 | #ifdef CONFIG_OF |
| 578 | if (np && of_property_read_bool( |
| 579 | np, "use-advanced-sector-protection") |
| 580 | && extp->BlkProtUnprot == 8) { |
| 581 | printk(KERN_INFO " Advanced Sector Protection (PPB Locking) supported\n"); |
| 582 | mtd->_lock = cfi_ppb_lock; |
| 583 | mtd->_unlock = cfi_ppb_unlock; |
| 584 | mtd->_is_locked = cfi_ppb_is_locked; |
| 585 | } |
| 586 | #endif |
| 587 | |
Guillaume LECERF | 564b849 | 2010-04-24 17:58:17 +0200 | [diff] [blame] | 588 | bootloc = extp->TopBottom; |
David Woodhouse | 412da2f | 2010-05-14 01:35:54 +0100 | [diff] [blame] | 589 | if ((bootloc < 2) || (bootloc > 5)) { |
| 590 | printk(KERN_WARNING "%s: CFI contains unrecognised boot " |
| 591 | "bank location (%d). Assuming bottom.\n", |
David Woodhouse | abab7eb | 2010-05-14 09:14:24 +0100 | [diff] [blame] | 592 | map->name, bootloc); |
Guillaume LECERF | 564b849 | 2010-04-24 17:58:17 +0200 | [diff] [blame] | 593 | bootloc = 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | } |
Guillaume LECERF | 564b849 | 2010-04-24 17:58:17 +0200 | [diff] [blame] | 595 | |
| 596 | if (bootloc == 3 && cfi->cfiq->NumEraseRegions > 1) { |
David Woodhouse | 412da2f | 2010-05-14 01:35:54 +0100 | [diff] [blame] | 597 | printk(KERN_WARNING "%s: Swapping erase regions for top-boot CFI table.\n", map->name); |
Guillaume LECERF | 564b849 | 2010-04-24 17:58:17 +0200 | [diff] [blame] | 598 | |
| 599 | for (i=0; i<cfi->cfiq->NumEraseRegions / 2; i++) { |
| 600 | int j = (cfi->cfiq->NumEraseRegions-1)-i; |
| 601 | __u32 swap; |
| 602 | |
| 603 | swap = cfi->cfiq->EraseRegionInfo[i]; |
| 604 | cfi->cfiq->EraseRegionInfo[i] = cfi->cfiq->EraseRegionInfo[j]; |
| 605 | cfi->cfiq->EraseRegionInfo[j] = swap; |
| 606 | } |
| 607 | } |
| 608 | /* Set the default CFI lock/unlock addresses */ |
| 609 | cfi->addr_unlock1 = 0x555; |
| 610 | cfi->addr_unlock2 = 0x2aa; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | } |
Guillaume LECERF | 83dcd3b | 2010-04-24 17:58:22 +0200 | [diff] [blame] | 612 | cfi_fixup(mtd, cfi_nopri_fixup_table); |
Guillaume LECERF | 564b849 | 2010-04-24 17:58:17 +0200 | [diff] [blame] | 613 | |
| 614 | if (!cfi->addr_unlock1 || !cfi->addr_unlock2) { |
| 615 | kfree(mtd); |
| 616 | return NULL; |
| 617 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | |
| 619 | } /* CFI mode */ |
| 620 | else if (cfi->cfi_mode == CFI_MODE_JEDEC) { |
| 621 | /* Apply jedec specific fixups */ |
| 622 | cfi_fixup(mtd, jedec_fixup_table); |
| 623 | } |
| 624 | /* Apply generic fixups */ |
| 625 | cfi_fixup(mtd, fixup_table); |
| 626 | |
| 627 | for (i=0; i< cfi->numchips; i++) { |
| 628 | cfi->chips[i].word_write_time = 1<<cfi->cfiq->WordWriteTimeoutTyp; |
| 629 | cfi->chips[i].buffer_write_time = 1<<cfi->cfiq->BufWriteTimeoutTyp; |
| 630 | cfi->chips[i].erase_time = 1<<cfi->cfiq->BlockEraseTimeoutTyp; |
Vijay Sampath | 83d4809 | 2007-03-06 02:39:44 -0800 | [diff] [blame] | 631 | cfi->chips[i].ref_point_counter = 0; |
| 632 | init_waitqueue_head(&(cfi->chips[i].wq)); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 633 | } |
| 634 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | map->fldrv = &cfi_amdstd_chipdrv; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 636 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | return cfi_amdstd_setup(mtd); |
| 638 | } |
Guillaume LECERF | 8046112 | 2010-05-20 16:54:10 +0200 | [diff] [blame] | 639 | struct mtd_info *cfi_cmdset_0006(struct map_info *map, int primary) __attribute__((alias("cfi_cmdset_0002"))); |
David Woodhouse | 1e804ce | 2010-05-20 16:54:05 +0200 | [diff] [blame] | 640 | struct mtd_info *cfi_cmdset_0701(struct map_info *map, int primary) __attribute__((alias("cfi_cmdset_0002"))); |
David Woodhouse | 83ea4ef | 2006-05-08 22:58:25 +0100 | [diff] [blame] | 641 | EXPORT_SYMBOL_GPL(cfi_cmdset_0002); |
Guillaume LECERF | 8046112 | 2010-05-20 16:54:10 +0200 | [diff] [blame] | 642 | EXPORT_SYMBOL_GPL(cfi_cmdset_0006); |
David Woodhouse | 1e804ce | 2010-05-20 16:54:05 +0200 | [diff] [blame] | 643 | EXPORT_SYMBOL_GPL(cfi_cmdset_0701); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | |
| 645 | static struct mtd_info *cfi_amdstd_setup(struct mtd_info *mtd) |
| 646 | { |
| 647 | struct map_info *map = mtd->priv; |
| 648 | struct cfi_private *cfi = map->fldrv_priv; |
| 649 | unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave; |
| 650 | unsigned long offset = 0; |
| 651 | int i,j; |
| 652 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 653 | printk(KERN_NOTICE "number of %s chips: %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | (cfi->cfi_mode == CFI_MODE_CFI)?"CFI":"JEDEC",cfi->numchips); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 655 | /* Select the correct geometry setup */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | mtd->size = devsize * cfi->numchips; |
| 657 | |
| 658 | mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips; |
| 659 | mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) |
| 660 | * mtd->numeraseregions, GFP_KERNEL); |
Jingoo Han | 5c8b1fb | 2014-02-06 15:19:35 +0900 | [diff] [blame^] | 661 | if (!mtd->eraseregions) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | goto setup_err; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 663 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | for (i=0; i<cfi->cfiq->NumEraseRegions; i++) { |
| 665 | unsigned long ernum, ersize; |
| 666 | ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave; |
| 667 | ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 668 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | if (mtd->erasesize < ersize) { |
| 670 | mtd->erasesize = ersize; |
| 671 | } |
| 672 | for (j=0; j<cfi->numchips; j++) { |
| 673 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset; |
| 674 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize; |
| 675 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum; |
| 676 | } |
| 677 | offset += (ersize * ernum); |
| 678 | } |
| 679 | if (offset != devsize) { |
| 680 | /* Argh */ |
| 681 | printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize); |
| 682 | goto setup_err; |
| 683 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | __module_get(THIS_MODULE); |
Kevin Cernekee | eafe131 | 2010-04-29 10:26:56 -0700 | [diff] [blame] | 686 | register_reboot_notifier(&mtd->reboot_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | return mtd; |
| 688 | |
| 689 | setup_err: |
Jiri Slaby | 17fabf1 | 2010-01-10 10:01:19 +0100 | [diff] [blame] | 690 | kfree(mtd->eraseregions); |
| 691 | kfree(mtd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | kfree(cfi->cmdset_priv); |
| 693 | kfree(cfi->cfiq); |
| 694 | return NULL; |
| 695 | } |
| 696 | |
| 697 | /* |
| 698 | * Return true if the chip is ready. |
| 699 | * |
| 700 | * Ready is one of: read mode, query mode, erase-suspend-read mode (in any |
| 701 | * non-suspended sector) and is indicated by no toggle bits toggling. |
| 702 | * |
| 703 | * Note that anything more complicated than checking if no bits are toggling |
| 704 | * (including checking DQ5 for an error status) is tricky to get working |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 705 | * correctly and is therefore not done (particularly with interleaved chips |
| 706 | * as each chip must be checked independently of the others). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | */ |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 708 | static int __xipram chip_ready(struct map_info *map, unsigned long addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | { |
| 710 | map_word d, t; |
| 711 | |
| 712 | d = map_read(map, addr); |
| 713 | t = map_read(map, addr); |
| 714 | |
| 715 | return map_word_equal(map, d, t); |
| 716 | } |
| 717 | |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame] | 718 | /* |
| 719 | * Return true if the chip is ready and has the correct value. |
| 720 | * |
| 721 | * Ready is one of: read mode, query mode, erase-suspend-read mode (in any |
| 722 | * non-suspended sector) and it is indicated by no bits toggling. |
| 723 | * |
| 724 | * Error are indicated by toggling bits or bits held with the wrong value, |
| 725 | * or with bits toggling. |
| 726 | * |
| 727 | * Note that anything more complicated than checking if no bits are toggling |
| 728 | * (including checking DQ5 for an error status) is tricky to get working |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 729 | * correctly and is therefore not done (particularly with interleaved chips |
| 730 | * as each chip must be checked independently of the others). |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame] | 731 | * |
| 732 | */ |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 733 | static int __xipram chip_good(struct map_info *map, unsigned long addr, map_word expected) |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame] | 734 | { |
| 735 | map_word oldd, curd; |
| 736 | |
| 737 | oldd = map_read(map, addr); |
| 738 | curd = map_read(map, addr); |
| 739 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 740 | return map_word_equal(map, oldd, curd) && |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame] | 741 | map_word_equal(map, curd, expected); |
| 742 | } |
| 743 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode) |
| 745 | { |
| 746 | DECLARE_WAITQUEUE(wait, current); |
| 747 | struct cfi_private *cfi = map->fldrv_priv; |
| 748 | unsigned long timeo; |
| 749 | struct cfi_pri_amdstd *cfip = (struct cfi_pri_amdstd *)cfi->cmdset_priv; |
| 750 | |
| 751 | resettime: |
| 752 | timeo = jiffies + HZ; |
| 753 | retry: |
| 754 | switch (chip->state) { |
| 755 | |
| 756 | case FL_STATUS: |
| 757 | for (;;) { |
| 758 | if (chip_ready(map, adr)) |
| 759 | break; |
| 760 | |
| 761 | if (time_after(jiffies, timeo)) { |
| 762 | printk(KERN_ERR "Waiting for chip to be ready timed out.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | return -EIO; |
| 764 | } |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 765 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | cfi_udelay(1); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 767 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | /* Someone else might have been playing with it. */ |
| 769 | goto retry; |
| 770 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 771 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | case FL_READY: |
| 773 | case FL_CFI_QUERY: |
| 774 | case FL_JEDEC_QUERY: |
| 775 | return 0; |
| 776 | |
| 777 | case FL_ERASING: |
Joakim Tjernlund | 2695eab | 2009-11-19 12:01:58 +0100 | [diff] [blame] | 778 | if (!cfip || !(cfip->EraseSuspend & (0x1|0x2)) || |
| 779 | !(mode == FL_READY || mode == FL_POINT || |
| 780 | (mode == FL_WRITING && (cfip->EraseSuspend & 0x2)))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | goto sleep; |
| 782 | |
| 783 | /* We could check to see if we're trying to access the sector |
| 784 | * that is currently being erased. However, no user will try |
| 785 | * anything like that so we just wait for the timeout. */ |
| 786 | |
| 787 | /* Erase suspend */ |
| 788 | /* It's harmless to issue the Erase-Suspend and Erase-Resume |
| 789 | * commands when the erase algorithm isn't in progress. */ |
| 790 | map_write(map, CMD(0xB0), chip->in_progress_block_addr); |
| 791 | chip->oldstate = FL_ERASING; |
| 792 | chip->state = FL_ERASE_SUSPENDING; |
| 793 | chip->erase_suspended = 1; |
| 794 | for (;;) { |
| 795 | if (chip_ready(map, adr)) |
| 796 | break; |
| 797 | |
| 798 | if (time_after(jiffies, timeo)) { |
| 799 | /* Should have suspended the erase by now. |
| 800 | * Send an Erase-Resume command as either |
| 801 | * there was an error (so leave the erase |
| 802 | * routine to recover from it) or we trying to |
| 803 | * use the erase-in-progress sector. */ |
Tadashi Abe | 100f234 | 2011-05-19 15:58:15 +0900 | [diff] [blame] | 804 | put_chip(map, chip, adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | printk(KERN_ERR "MTD %s(): chip not ready after erase suspend\n", __func__); |
| 806 | return -EIO; |
| 807 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 808 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 809 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | cfi_udelay(1); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 811 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | /* Nobody will touch it while it's in state FL_ERASE_SUSPENDING. |
| 813 | So we can just loop here. */ |
| 814 | } |
| 815 | chip->state = FL_READY; |
| 816 | return 0; |
| 817 | |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 818 | case FL_XIP_WHILE_ERASING: |
| 819 | if (mode != FL_READY && mode != FL_POINT && |
| 820 | (!cfip || !(cfip->EraseSuspend&2))) |
| 821 | goto sleep; |
| 822 | chip->oldstate = chip->state; |
| 823 | chip->state = FL_READY; |
| 824 | return 0; |
| 825 | |
Kevin Cernekee | eafe131 | 2010-04-29 10:26:56 -0700 | [diff] [blame] | 826 | case FL_SHUTDOWN: |
| 827 | /* The machine is rebooting */ |
| 828 | return -EIO; |
| 829 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | case FL_POINT: |
| 831 | /* Only if there's no operation suspended... */ |
| 832 | if (mode == FL_READY && chip->oldstate == FL_READY) |
| 833 | return 0; |
| 834 | |
| 835 | default: |
| 836 | sleep: |
| 837 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 838 | add_wait_queue(&chip->wq, &wait); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 839 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | schedule(); |
| 841 | remove_wait_queue(&chip->wq, &wait); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 842 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | goto resettime; |
| 844 | } |
| 845 | } |
| 846 | |
| 847 | |
| 848 | static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr) |
| 849 | { |
| 850 | struct cfi_private *cfi = map->fldrv_priv; |
| 851 | |
| 852 | switch(chip->oldstate) { |
| 853 | case FL_ERASING: |
Gerlando Falauto | 4209628 | 2012-07-03 09:09:47 +0200 | [diff] [blame] | 854 | cfi_fixup_m29ew_erase_suspend(map, |
| 855 | chip->in_progress_block_addr); |
Guillaume LECERF | 0896804 | 2010-10-26 10:45:23 +0100 | [diff] [blame] | 856 | map_write(map, cfi->sector_erase_cmd, chip->in_progress_block_addr); |
Gerlando Falauto | 4209628 | 2012-07-03 09:09:47 +0200 | [diff] [blame] | 857 | cfi_fixup_m29ew_delay_after_resume(cfi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | chip->oldstate = FL_READY; |
| 859 | chip->state = FL_ERASING; |
| 860 | break; |
| 861 | |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 862 | case FL_XIP_WHILE_ERASING: |
| 863 | chip->state = chip->oldstate; |
| 864 | chip->oldstate = FL_READY; |
| 865 | break; |
| 866 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | case FL_READY: |
| 868 | case FL_STATUS: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | break; |
| 870 | default: |
| 871 | printk(KERN_ERR "MTD: put_chip() called with oldstate %d!!\n", chip->oldstate); |
| 872 | } |
| 873 | wake_up(&chip->wq); |
| 874 | } |
| 875 | |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 876 | #ifdef CONFIG_MTD_XIP |
| 877 | |
| 878 | /* |
| 879 | * No interrupt what so ever can be serviced while the flash isn't in array |
| 880 | * mode. This is ensured by the xip_disable() and xip_enable() functions |
| 881 | * enclosing any code path where the flash is known not to be in array mode. |
| 882 | * And within a XIP disabled code path, only functions marked with __xipram |
| 883 | * may be called and nothing else (it's a good thing to inspect generated |
| 884 | * assembly to make sure inline functions were actually inlined and that gcc |
| 885 | * didn't emit calls to its own support functions). Also configuring MTD CFI |
| 886 | * support to a single buswidth and a single interleave is also recommended. |
| 887 | */ |
Thomas Gleixner | f8eb321 | 2005-07-05 01:03:06 +0200 | [diff] [blame] | 888 | |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 889 | static void xip_disable(struct map_info *map, struct flchip *chip, |
| 890 | unsigned long adr) |
| 891 | { |
| 892 | /* TODO: chips with no XIP use should ignore and return */ |
| 893 | (void) map_read(map, adr); /* ensure mmu mapping is up to date */ |
| 894 | local_irq_disable(); |
| 895 | } |
| 896 | |
| 897 | static void __xipram xip_enable(struct map_info *map, struct flchip *chip, |
| 898 | unsigned long adr) |
| 899 | { |
| 900 | struct cfi_private *cfi = map->fldrv_priv; |
| 901 | |
| 902 | if (chip->state != FL_POINT && chip->state != FL_READY) { |
| 903 | map_write(map, CMD(0xf0), adr); |
| 904 | chip->state = FL_READY; |
| 905 | } |
| 906 | (void) map_read(map, adr); |
Thomas Gleixner | 97f927a | 2005-07-07 16:50:16 +0200 | [diff] [blame] | 907 | xip_iprefetch(); |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 908 | local_irq_enable(); |
| 909 | } |
| 910 | |
| 911 | /* |
| 912 | * When a delay is required for the flash operation to complete, the |
| 913 | * xip_udelay() function is polling for both the given timeout and pending |
| 914 | * (but still masked) hardware interrupts. Whenever there is an interrupt |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 915 | * pending then the flash erase operation is suspended, array mode restored |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 916 | * and interrupts unmasked. Task scheduling might also happen at that |
| 917 | * point. The CPU eventually returns from the interrupt or the call to |
| 918 | * schedule() and the suspended flash operation is resumed for the remaining |
| 919 | * of the delay period. |
| 920 | * |
| 921 | * Warning: this function _will_ fool interrupt latency tracing tools. |
| 922 | */ |
| 923 | |
| 924 | static void __xipram xip_udelay(struct map_info *map, struct flchip *chip, |
| 925 | unsigned long adr, int usec) |
| 926 | { |
| 927 | struct cfi_private *cfi = map->fldrv_priv; |
| 928 | struct cfi_pri_amdstd *extp = cfi->cmdset_priv; |
| 929 | map_word status, OK = CMD(0x80); |
| 930 | unsigned long suspended, start = xip_currtime(); |
| 931 | flstate_t oldstate; |
| 932 | |
| 933 | do { |
| 934 | cpu_relax(); |
| 935 | if (xip_irqpending() && extp && |
| 936 | ((chip->state == FL_ERASING && (extp->EraseSuspend & 2))) && |
| 937 | (cfi_interleave_is_1(cfi) || chip->oldstate == FL_READY)) { |
| 938 | /* |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 939 | * Let's suspend the erase operation when supported. |
| 940 | * Note that we currently don't try to suspend |
| 941 | * interleaved chips if there is already another |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 942 | * operation suspended (imagine what happens |
| 943 | * when one chip was already done with the current |
| 944 | * operation while another chip suspended it, then |
| 945 | * we resume the whole thing at once). Yes, it |
| 946 | * can happen! |
| 947 | */ |
| 948 | map_write(map, CMD(0xb0), adr); |
| 949 | usec -= xip_elapsed_since(start); |
| 950 | suspended = xip_currtime(); |
| 951 | do { |
| 952 | if (xip_elapsed_since(suspended) > 100000) { |
| 953 | /* |
| 954 | * The chip doesn't want to suspend |
| 955 | * after waiting for 100 msecs. |
| 956 | * This is a critical error but there |
| 957 | * is not much we can do here. |
| 958 | */ |
| 959 | return; |
| 960 | } |
| 961 | status = map_read(map, adr); |
| 962 | } while (!map_word_andequal(map, status, OK, OK)); |
| 963 | |
| 964 | /* Suspend succeeded */ |
| 965 | oldstate = chip->state; |
| 966 | if (!map_word_bitsset(map, status, CMD(0x40))) |
| 967 | break; |
| 968 | chip->state = FL_XIP_WHILE_ERASING; |
| 969 | chip->erase_suspended = 1; |
| 970 | map_write(map, CMD(0xf0), adr); |
| 971 | (void) map_read(map, adr); |
Paulius Zaleckas | ca5c23c | 2008-02-27 01:42:39 +0200 | [diff] [blame] | 972 | xip_iprefetch(); |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 973 | local_irq_enable(); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 974 | mutex_unlock(&chip->mutex); |
Paulius Zaleckas | ca5c23c | 2008-02-27 01:42:39 +0200 | [diff] [blame] | 975 | xip_iprefetch(); |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 976 | cond_resched(); |
| 977 | |
| 978 | /* |
| 979 | * We're back. However someone else might have |
| 980 | * decided to go write to the chip if we are in |
| 981 | * a suspended erase state. If so let's wait |
| 982 | * until it's done. |
| 983 | */ |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 984 | mutex_lock(&chip->mutex); |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 985 | while (chip->state != FL_XIP_WHILE_ERASING) { |
| 986 | DECLARE_WAITQUEUE(wait, current); |
| 987 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 988 | add_wait_queue(&chip->wq, &wait); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 989 | mutex_unlock(&chip->mutex); |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 990 | schedule(); |
| 991 | remove_wait_queue(&chip->wq, &wait); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 992 | mutex_lock(&chip->mutex); |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 993 | } |
| 994 | /* Disallow XIP again */ |
| 995 | local_irq_disable(); |
| 996 | |
Gerlando Falauto | 4209628 | 2012-07-03 09:09:47 +0200 | [diff] [blame] | 997 | /* Correct Erase Suspend Hangups for M29EW */ |
| 998 | cfi_fixup_m29ew_erase_suspend(map, adr); |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 999 | /* Resume the write or erase operation */ |
Guillaume LECERF | 0896804 | 2010-10-26 10:45:23 +0100 | [diff] [blame] | 1000 | map_write(map, cfi->sector_erase_cmd, adr); |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1001 | chip->state = oldstate; |
| 1002 | start = xip_currtime(); |
| 1003 | } else if (usec >= 1000000/HZ) { |
| 1004 | /* |
| 1005 | * Try to save on CPU power when waiting delay |
| 1006 | * is at least a system timer tick period. |
| 1007 | * No need to be extremely accurate here. |
| 1008 | */ |
| 1009 | xip_cpu_idle(); |
| 1010 | } |
| 1011 | status = map_read(map, adr); |
| 1012 | } while (!map_word_andequal(map, status, OK, OK) |
| 1013 | && xip_elapsed_since(start) < usec); |
| 1014 | } |
| 1015 | |
| 1016 | #define UDELAY(map, chip, adr, usec) xip_udelay(map, chip, adr, usec) |
| 1017 | |
| 1018 | /* |
| 1019 | * The INVALIDATE_CACHED_RANGE() macro is normally used in parallel while |
| 1020 | * the flash is actively programming or erasing since we have to poll for |
| 1021 | * the operation to complete anyway. We can't do that in a generic way with |
| 1022 | * a XIP setup so do it before the actual flash operation in this case |
| 1023 | * and stub it out from INVALIDATE_CACHE_UDELAY. |
| 1024 | */ |
| 1025 | #define XIP_INVAL_CACHED_RANGE(map, from, size) \ |
| 1026 | INVALIDATE_CACHED_RANGE(map, from, size) |
| 1027 | |
| 1028 | #define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \ |
| 1029 | UDELAY(map, chip, adr, usec) |
| 1030 | |
| 1031 | /* |
| 1032 | * Extra notes: |
| 1033 | * |
| 1034 | * Activating this XIP support changes the way the code works a bit. For |
| 1035 | * example the code to suspend the current process when concurrent access |
| 1036 | * happens is never executed because xip_udelay() will always return with the |
| 1037 | * same chip state as it was entered with. This is why there is no care for |
| 1038 | * the presence of add_wait_queue() or schedule() calls from within a couple |
| 1039 | * xip_disable()'d areas of code, like in do_erase_oneblock for example. |
| 1040 | * The queueing and scheduling are always happening within xip_udelay(). |
| 1041 | * |
| 1042 | * Similarly, get_chip() and put_chip() just happen to always be executed |
| 1043 | * with chip->state set to FL_READY (or FL_XIP_WHILE_*) where flash state |
| 1044 | * is in array mode, therefore never executing many cases therein and not |
| 1045 | * causing any problem with XIP. |
| 1046 | */ |
| 1047 | |
| 1048 | #else |
| 1049 | |
| 1050 | #define xip_disable(map, chip, adr) |
| 1051 | #define xip_enable(map, chip, adr) |
| 1052 | #define XIP_INVAL_CACHED_RANGE(x...) |
| 1053 | |
| 1054 | #define UDELAY(map, chip, adr, usec) \ |
| 1055 | do { \ |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1056 | mutex_unlock(&chip->mutex); \ |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1057 | cfi_udelay(usec); \ |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1058 | mutex_lock(&chip->mutex); \ |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1059 | } while (0) |
| 1060 | |
| 1061 | #define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \ |
| 1062 | do { \ |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1063 | mutex_unlock(&chip->mutex); \ |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1064 | INVALIDATE_CACHED_RANGE(map, adr, len); \ |
| 1065 | cfi_udelay(usec); \ |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1066 | mutex_lock(&chip->mutex); \ |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1067 | } while (0) |
| 1068 | |
| 1069 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | |
| 1071 | static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) |
| 1072 | { |
| 1073 | unsigned long cmd_addr; |
| 1074 | struct cfi_private *cfi = map->fldrv_priv; |
| 1075 | int ret; |
| 1076 | |
| 1077 | adr += chip->start; |
| 1078 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1079 | /* Ensure cmd read/writes are aligned. */ |
| 1080 | cmd_addr = adr & ~(map_bankwidth(map)-1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1082 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | ret = get_chip(map, chip, cmd_addr, FL_READY); |
| 1084 | if (ret) { |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1085 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | return ret; |
| 1087 | } |
| 1088 | |
| 1089 | if (chip->state != FL_POINT && chip->state != FL_READY) { |
| 1090 | map_write(map, CMD(0xf0), cmd_addr); |
| 1091 | chip->state = FL_READY; |
| 1092 | } |
| 1093 | |
| 1094 | map_copy_from(map, buf, adr, len); |
| 1095 | |
| 1096 | put_chip(map, chip, cmd_addr); |
| 1097 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1098 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | return 0; |
| 1100 | } |
| 1101 | |
| 1102 | |
| 1103 | static int cfi_amdstd_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) |
| 1104 | { |
| 1105 | struct map_info *map = mtd->priv; |
| 1106 | struct cfi_private *cfi = map->fldrv_priv; |
| 1107 | unsigned long ofs; |
| 1108 | int chipnum; |
| 1109 | int ret = 0; |
| 1110 | |
| 1111 | /* ofs: offset within the first chip that the first read should start */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | chipnum = (from >> cfi->chipshift); |
| 1113 | ofs = from - (chipnum << cfi->chipshift); |
| 1114 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | while (len) { |
| 1116 | unsigned long thislen; |
| 1117 | |
| 1118 | if (chipnum >= cfi->numchips) |
| 1119 | break; |
| 1120 | |
| 1121 | if ((len + ofs -1) >> cfi->chipshift) |
| 1122 | thislen = (1<<cfi->chipshift) - ofs; |
| 1123 | else |
| 1124 | thislen = len; |
| 1125 | |
| 1126 | ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); |
| 1127 | if (ret) |
| 1128 | break; |
| 1129 | |
| 1130 | *retlen += thislen; |
| 1131 | len -= thislen; |
| 1132 | buf += thislen; |
| 1133 | |
| 1134 | ofs = 0; |
| 1135 | chipnum++; |
| 1136 | } |
| 1137 | return ret; |
| 1138 | } |
| 1139 | |
| 1140 | |
| 1141 | static inline int do_read_secsi_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) |
| 1142 | { |
| 1143 | DECLARE_WAITQUEUE(wait, current); |
| 1144 | unsigned long timeo = jiffies + HZ; |
| 1145 | struct cfi_private *cfi = map->fldrv_priv; |
| 1146 | |
| 1147 | retry: |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1148 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | |
| 1150 | if (chip->state != FL_READY){ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1152 | add_wait_queue(&chip->wq, &wait); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1153 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1154 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | |
| 1156 | schedule(); |
| 1157 | remove_wait_queue(&chip->wq, &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | timeo = jiffies + HZ; |
| 1159 | |
| 1160 | goto retry; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1161 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | |
| 1163 | adr += chip->start; |
| 1164 | |
| 1165 | chip->state = FL_READY; |
| 1166 | |
| 1167 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1168 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); |
| 1169 | cfi_send_gen_cmd(0x88, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1170 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | map_copy_from(map, buf, adr, len); |
| 1172 | |
| 1173 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1174 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); |
| 1175 | cfi_send_gen_cmd(0x90, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1176 | cfi_send_gen_cmd(0x00, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | wake_up(&chip->wq); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1179 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | |
| 1181 | return 0; |
| 1182 | } |
| 1183 | |
| 1184 | static int cfi_amdstd_secsi_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) |
| 1185 | { |
| 1186 | struct map_info *map = mtd->priv; |
| 1187 | struct cfi_private *cfi = map->fldrv_priv; |
| 1188 | unsigned long ofs; |
| 1189 | int chipnum; |
| 1190 | int ret = 0; |
| 1191 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | /* ofs: offset within the first chip that the first read should start */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | /* 8 secsi bytes per chip */ |
| 1194 | chipnum=from>>3; |
| 1195 | ofs=from & 7; |
| 1196 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | while (len) { |
| 1198 | unsigned long thislen; |
| 1199 | |
| 1200 | if (chipnum >= cfi->numchips) |
| 1201 | break; |
| 1202 | |
| 1203 | if ((len + ofs -1) >> 3) |
| 1204 | thislen = (1<<3) - ofs; |
| 1205 | else |
| 1206 | thislen = len; |
| 1207 | |
| 1208 | ret = do_read_secsi_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); |
| 1209 | if (ret) |
| 1210 | break; |
| 1211 | |
| 1212 | *retlen += thislen; |
| 1213 | len -= thislen; |
| 1214 | buf += thislen; |
| 1215 | |
| 1216 | ofs = 0; |
| 1217 | chipnum++; |
| 1218 | } |
| 1219 | return ret; |
| 1220 | } |
| 1221 | |
| 1222 | |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1223 | static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, unsigned long adr, map_word datum) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | { |
| 1225 | struct cfi_private *cfi = map->fldrv_priv; |
| 1226 | unsigned long timeo = jiffies + HZ; |
| 1227 | /* |
| 1228 | * We use a 1ms + 1 jiffies generic timeout for writes (most devices |
| 1229 | * have a max write time of a few hundreds usec). However, we should |
| 1230 | * use the maximum timeout value given by the chip at probe time |
| 1231 | * instead. Unfortunately, struct flchip does have a field for |
| 1232 | * maximum timeout, only for typical which can be far too short |
| 1233 | * depending of the conditions. The ' + 1' is to avoid having a |
| 1234 | * timeout of 0 jiffies if HZ is smaller than 1000. |
| 1235 | */ |
| 1236 | unsigned long uWriteTimeout = ( HZ / 1000 ) + 1; |
| 1237 | int ret = 0; |
| 1238 | map_word oldd; |
| 1239 | int retry_cnt = 0; |
| 1240 | |
| 1241 | adr += chip->start; |
| 1242 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1243 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | ret = get_chip(map, chip, adr, FL_WRITING); |
| 1245 | if (ret) { |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1246 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | return ret; |
| 1248 | } |
| 1249 | |
Brian Norris | 289c052 | 2011-07-19 10:06:09 -0700 | [diff] [blame] | 1250 | pr_debug("MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1251 | __func__, adr, datum.x[0] ); |
| 1252 | |
| 1253 | /* |
| 1254 | * Check for a NOP for the case when the datum to write is already |
| 1255 | * present - it saves time and works around buggy chips that corrupt |
| 1256 | * data at other locations when 0xff is written to a location that |
| 1257 | * already contains 0xff. |
| 1258 | */ |
| 1259 | oldd = map_read(map, adr); |
| 1260 | if (map_word_equal(map, oldd, datum)) { |
Brian Norris | 289c052 | 2011-07-19 10:06:09 -0700 | [diff] [blame] | 1261 | pr_debug("MTD %s(): NOP\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | __func__); |
| 1263 | goto op_done; |
| 1264 | } |
| 1265 | |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1266 | XIP_INVAL_CACHED_RANGE(map, adr, map_bankwidth(map)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | ENABLE_VPP(map); |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1268 | xip_disable(map, chip, adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | retry: |
| 1270 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1271 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); |
| 1272 | cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1273 | map_write(map, datum, adr); |
| 1274 | chip->state = FL_WRITING; |
| 1275 | |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1276 | INVALIDATE_CACHE_UDELAY(map, chip, |
| 1277 | adr, map_bankwidth(map), |
| 1278 | chip->word_write_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | |
| 1280 | /* See comment above for timeout value. */ |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1281 | timeo = jiffies + uWriteTimeout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | for (;;) { |
| 1283 | if (chip->state != FL_WRITING) { |
| 1284 | /* Someone's suspended the write. Sleep */ |
| 1285 | DECLARE_WAITQUEUE(wait, current); |
| 1286 | |
| 1287 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1288 | add_wait_queue(&chip->wq, &wait); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1289 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | schedule(); |
| 1291 | remove_wait_queue(&chip->wq, &wait); |
| 1292 | timeo = jiffies + (HZ / 2); /* FIXME */ |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1293 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | continue; |
| 1295 | } |
| 1296 | |
Konstantin Baidarov | b95f960 | 2005-11-07 09:00:05 +0000 | [diff] [blame] | 1297 | if (time_after(jiffies, timeo) && !chip_ready(map, adr)){ |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1298 | xip_enable(map, chip, adr); |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame] | 1299 | printk(KERN_WARNING "MTD %s(): software timeout\n", __func__); |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1300 | xip_disable(map, chip, adr); |
Konstantin Baidarov | b95f960 | 2005-11-07 09:00:05 +0000 | [diff] [blame] | 1301 | break; |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame] | 1302 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | |
Konstantin Baidarov | b95f960 | 2005-11-07 09:00:05 +0000 | [diff] [blame] | 1304 | if (chip_ready(map, adr)) |
| 1305 | break; |
| 1306 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | /* Latency issues. Drop the lock, wait a while and retry */ |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1308 | UDELAY(map, chip, adr, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | } |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame] | 1310 | /* Did we succeed? */ |
| 1311 | if (!chip_good(map, adr, datum)) { |
| 1312 | /* reset on all failures. */ |
| 1313 | map_write( map, CMD(0xF0), chip->start ); |
| 1314 | /* FIXME - should have reset delay before continuing */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1316 | if (++retry_cnt <= MAX_WORD_RETRIES) |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame] | 1317 | goto retry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame] | 1319 | ret = -EIO; |
| 1320 | } |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1321 | xip_enable(map, chip, adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | op_done: |
| 1323 | chip->state = FL_READY; |
Paul Parsons | e7d9377 | 2012-03-07 14:11:16 +0000 | [diff] [blame] | 1324 | DISABLE_VPP(map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | put_chip(map, chip, adr); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1326 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | |
| 1328 | return ret; |
| 1329 | } |
| 1330 | |
| 1331 | |
| 1332 | static int cfi_amdstd_write_words(struct mtd_info *mtd, loff_t to, size_t len, |
| 1333 | size_t *retlen, const u_char *buf) |
| 1334 | { |
| 1335 | struct map_info *map = mtd->priv; |
| 1336 | struct cfi_private *cfi = map->fldrv_priv; |
| 1337 | int ret = 0; |
| 1338 | int chipnum; |
| 1339 | unsigned long ofs, chipstart; |
| 1340 | DECLARE_WAITQUEUE(wait, current); |
| 1341 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | chipnum = to >> cfi->chipshift; |
| 1343 | ofs = to - (chipnum << cfi->chipshift); |
| 1344 | chipstart = cfi->chips[chipnum].start; |
| 1345 | |
| 1346 | /* If it's not bus-aligned, do the first byte write */ |
| 1347 | if (ofs & (map_bankwidth(map)-1)) { |
| 1348 | unsigned long bus_ofs = ofs & ~(map_bankwidth(map)-1); |
| 1349 | int i = ofs - bus_ofs; |
| 1350 | int n = 0; |
| 1351 | map_word tmp_buf; |
| 1352 | |
| 1353 | retry: |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1354 | mutex_lock(&cfi->chips[chipnum].mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | |
| 1356 | if (cfi->chips[chipnum].state != FL_READY) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1358 | add_wait_queue(&cfi->chips[chipnum].wq, &wait); |
| 1359 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1360 | mutex_unlock(&cfi->chips[chipnum].mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | |
| 1362 | schedule(); |
| 1363 | remove_wait_queue(&cfi->chips[chipnum].wq, &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | goto retry; |
| 1365 | } |
| 1366 | |
| 1367 | /* Load 'tmp_buf' with old contents of flash */ |
| 1368 | tmp_buf = map_read(map, bus_ofs+chipstart); |
| 1369 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1370 | mutex_unlock(&cfi->chips[chipnum].mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | |
| 1372 | /* Number of bytes to copy from buffer */ |
| 1373 | n = min_t(int, len, map_bankwidth(map)-i); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1374 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | tmp_buf = map_word_load_partial(map, tmp_buf, buf, i, n); |
| 1376 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1377 | ret = do_write_oneword(map, &cfi->chips[chipnum], |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | bus_ofs, tmp_buf); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1379 | if (ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | return ret; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1381 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | ofs += n; |
| 1383 | buf += n; |
| 1384 | (*retlen) += n; |
| 1385 | len -= n; |
| 1386 | |
| 1387 | if (ofs >> cfi->chipshift) { |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1388 | chipnum ++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | ofs = 0; |
| 1390 | if (chipnum == cfi->numchips) |
| 1391 | return 0; |
| 1392 | } |
| 1393 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1394 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | /* We are now aligned, write as much as possible */ |
| 1396 | while(len >= map_bankwidth(map)) { |
| 1397 | map_word datum; |
| 1398 | |
| 1399 | datum = map_word_load(map, buf); |
| 1400 | |
| 1401 | ret = do_write_oneword(map, &cfi->chips[chipnum], |
| 1402 | ofs, datum); |
| 1403 | if (ret) |
| 1404 | return ret; |
| 1405 | |
| 1406 | ofs += map_bankwidth(map); |
| 1407 | buf += map_bankwidth(map); |
| 1408 | (*retlen) += map_bankwidth(map); |
| 1409 | len -= map_bankwidth(map); |
| 1410 | |
| 1411 | if (ofs >> cfi->chipshift) { |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1412 | chipnum ++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | ofs = 0; |
| 1414 | if (chipnum == cfi->numchips) |
| 1415 | return 0; |
| 1416 | chipstart = cfi->chips[chipnum].start; |
| 1417 | } |
| 1418 | } |
| 1419 | |
| 1420 | /* Write the trailing bytes if any */ |
| 1421 | if (len & (map_bankwidth(map)-1)) { |
| 1422 | map_word tmp_buf; |
| 1423 | |
| 1424 | retry1: |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1425 | mutex_lock(&cfi->chips[chipnum].mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | |
| 1427 | if (cfi->chips[chipnum].state != FL_READY) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1429 | add_wait_queue(&cfi->chips[chipnum].wq, &wait); |
| 1430 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1431 | mutex_unlock(&cfi->chips[chipnum].mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | |
| 1433 | schedule(); |
| 1434 | remove_wait_queue(&cfi->chips[chipnum].wq, &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | goto retry1; |
| 1436 | } |
| 1437 | |
| 1438 | tmp_buf = map_read(map, ofs + chipstart); |
| 1439 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1440 | mutex_unlock(&cfi->chips[chipnum].mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | |
| 1442 | tmp_buf = map_word_load_partial(map, tmp_buf, buf, 0, len); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1443 | |
| 1444 | ret = do_write_oneword(map, &cfi->chips[chipnum], |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | ofs, tmp_buf); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1446 | if (ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | return ret; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1448 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | (*retlen) += len; |
| 1450 | } |
| 1451 | |
| 1452 | return 0; |
| 1453 | } |
| 1454 | |
| 1455 | |
| 1456 | /* |
| 1457 | * FIXME: interleaved mode not tested, and probably not supported! |
| 1458 | */ |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1459 | static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1460 | unsigned long adr, const u_char *buf, |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1461 | int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1462 | { |
| 1463 | struct cfi_private *cfi = map->fldrv_priv; |
| 1464 | unsigned long timeo = jiffies + HZ; |
| 1465 | /* see comments in do_write_oneword() regarding uWriteTimeo. */ |
| 1466 | unsigned long uWriteTimeout = ( HZ / 1000 ) + 1; |
| 1467 | int ret = -EIO; |
| 1468 | unsigned long cmd_adr; |
| 1469 | int z, words; |
| 1470 | map_word datum; |
| 1471 | |
| 1472 | adr += chip->start; |
| 1473 | cmd_adr = adr; |
| 1474 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1475 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1476 | ret = get_chip(map, chip, adr, FL_WRITING); |
| 1477 | if (ret) { |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1478 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | return ret; |
| 1480 | } |
| 1481 | |
| 1482 | datum = map_word_load(map, buf); |
| 1483 | |
Brian Norris | 289c052 | 2011-07-19 10:06:09 -0700 | [diff] [blame] | 1484 | pr_debug("MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1485 | __func__, adr, datum.x[0] ); |
| 1486 | |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1487 | XIP_INVAL_CACHED_RANGE(map, adr, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | ENABLE_VPP(map); |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1489 | xip_disable(map, chip, cmd_adr); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1490 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1492 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | |
| 1494 | /* Write Buffer Load */ |
| 1495 | map_write(map, CMD(0x25), cmd_adr); |
| 1496 | |
| 1497 | chip->state = FL_WRITING_TO_BUFFER; |
| 1498 | |
| 1499 | /* Write length of data to come */ |
| 1500 | words = len / map_bankwidth(map); |
| 1501 | map_write(map, CMD(words - 1), cmd_adr); |
| 1502 | /* Write data */ |
| 1503 | z = 0; |
| 1504 | while(z < words * map_bankwidth(map)) { |
| 1505 | datum = map_word_load(map, buf); |
| 1506 | map_write(map, datum, adr + z); |
| 1507 | |
| 1508 | z += map_bankwidth(map); |
| 1509 | buf += map_bankwidth(map); |
| 1510 | } |
| 1511 | z -= map_bankwidth(map); |
| 1512 | |
| 1513 | adr += z; |
| 1514 | |
| 1515 | /* Write Buffer Program Confirm: GO GO GO */ |
| 1516 | map_write(map, CMD(0x29), cmd_adr); |
| 1517 | chip->state = FL_WRITING; |
| 1518 | |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1519 | INVALIDATE_CACHE_UDELAY(map, chip, |
| 1520 | adr, map_bankwidth(map), |
| 1521 | chip->word_write_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1522 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1523 | timeo = jiffies + uWriteTimeout; |
| 1524 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1525 | for (;;) { |
| 1526 | if (chip->state != FL_WRITING) { |
| 1527 | /* Someone's suspended the write. Sleep */ |
| 1528 | DECLARE_WAITQUEUE(wait, current); |
| 1529 | |
| 1530 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1531 | add_wait_queue(&chip->wq, &wait); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1532 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1533 | schedule(); |
| 1534 | remove_wait_queue(&chip->wq, &wait); |
| 1535 | timeo = jiffies + (HZ / 2); /* FIXME */ |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1536 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1537 | continue; |
| 1538 | } |
| 1539 | |
Konstantin Baidarov | b95f960 | 2005-11-07 09:00:05 +0000 | [diff] [blame] | 1540 | if (time_after(jiffies, timeo) && !chip_ready(map, adr)) |
| 1541 | break; |
| 1542 | |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1543 | if (chip_ready(map, adr)) { |
| 1544 | xip_enable(map, chip, adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1545 | goto op_done; |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1546 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1547 | |
| 1548 | /* Latency issues. Drop the lock, wait a while and retry */ |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1549 | UDELAY(map, chip, adr, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | } |
| 1551 | |
Harald Nordgard-Hansen | 070c322 | 2012-11-23 23:11:03 +0100 | [diff] [blame] | 1552 | /* |
| 1553 | * Recovery from write-buffer programming failures requires |
| 1554 | * the write-to-buffer-reset sequence. Since the last part |
| 1555 | * of the sequence also works as a normal reset, we can run |
| 1556 | * the same commands regardless of why we are here. |
| 1557 | * See e.g. |
| 1558 | * http://www.spansion.com/Support/Application%20Notes/MirrorBit_Write_Buffer_Prog_Page_Buffer_Read_AN.pdf |
| 1559 | */ |
| 1560 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, |
| 1561 | cfi->device_type, NULL); |
| 1562 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, |
| 1563 | cfi->device_type, NULL); |
| 1564 | cfi_send_gen_cmd(0xF0, cfi->addr_unlock1, chip->start, map, cfi, |
| 1565 | cfi->device_type, NULL); |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1566 | xip_enable(map, chip, adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | /* FIXME - should have reset delay before continuing */ |
| 1568 | |
Huang Shijie | 25983b1 | 2013-04-01 17:40:18 +0800 | [diff] [blame] | 1569 | printk(KERN_WARNING "MTD %s(): software timeout, address:0x%.8lx.\n", |
| 1570 | __func__, adr); |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1571 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | ret = -EIO; |
| 1573 | op_done: |
| 1574 | chip->state = FL_READY; |
Paul Parsons | e7d9377 | 2012-03-07 14:11:16 +0000 | [diff] [blame] | 1575 | DISABLE_VPP(map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1576 | put_chip(map, chip, adr); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1577 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1578 | |
| 1579 | return ret; |
| 1580 | } |
| 1581 | |
| 1582 | |
| 1583 | static int cfi_amdstd_write_buffers(struct mtd_info *mtd, loff_t to, size_t len, |
| 1584 | size_t *retlen, const u_char *buf) |
| 1585 | { |
| 1586 | struct map_info *map = mtd->priv; |
| 1587 | struct cfi_private *cfi = map->fldrv_priv; |
| 1588 | int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; |
| 1589 | int ret = 0; |
| 1590 | int chipnum; |
| 1591 | unsigned long ofs; |
| 1592 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1593 | chipnum = to >> cfi->chipshift; |
| 1594 | ofs = to - (chipnum << cfi->chipshift); |
| 1595 | |
| 1596 | /* If it's not bus-aligned, do the first word write */ |
| 1597 | if (ofs & (map_bankwidth(map)-1)) { |
| 1598 | size_t local_len = (-ofs)&(map_bankwidth(map)-1); |
| 1599 | if (local_len > len) |
| 1600 | local_len = len; |
| 1601 | ret = cfi_amdstd_write_words(mtd, ofs + (chipnum<<cfi->chipshift), |
| 1602 | local_len, retlen, buf); |
| 1603 | if (ret) |
| 1604 | return ret; |
| 1605 | ofs += local_len; |
| 1606 | buf += local_len; |
| 1607 | len -= local_len; |
| 1608 | |
| 1609 | if (ofs >> cfi->chipshift) { |
| 1610 | chipnum ++; |
| 1611 | ofs = 0; |
| 1612 | if (chipnum == cfi->numchips) |
| 1613 | return 0; |
| 1614 | } |
| 1615 | } |
| 1616 | |
| 1617 | /* Write buffer is worth it only if more than one word to write... */ |
| 1618 | while (len >= map_bankwidth(map) * 2) { |
| 1619 | /* We must not cross write block boundaries */ |
| 1620 | int size = wbufsize - (ofs & (wbufsize-1)); |
| 1621 | |
| 1622 | if (size > len) |
| 1623 | size = len; |
| 1624 | if (size % map_bankwidth(map)) |
| 1625 | size -= size % map_bankwidth(map); |
| 1626 | |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1627 | ret = do_write_buffer(map, &cfi->chips[chipnum], |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1628 | ofs, buf, size); |
| 1629 | if (ret) |
| 1630 | return ret; |
| 1631 | |
| 1632 | ofs += size; |
| 1633 | buf += size; |
| 1634 | (*retlen) += size; |
| 1635 | len -= size; |
| 1636 | |
| 1637 | if (ofs >> cfi->chipshift) { |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 1638 | chipnum ++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | ofs = 0; |
| 1640 | if (chipnum == cfi->numchips) |
| 1641 | return 0; |
| 1642 | } |
| 1643 | } |
| 1644 | |
| 1645 | if (len) { |
| 1646 | size_t retlen_dregs = 0; |
| 1647 | |
| 1648 | ret = cfi_amdstd_write_words(mtd, ofs + (chipnum<<cfi->chipshift), |
| 1649 | len, &retlen_dregs, buf); |
| 1650 | |
| 1651 | *retlen += retlen_dregs; |
| 1652 | return ret; |
| 1653 | } |
| 1654 | |
| 1655 | return 0; |
| 1656 | } |
| 1657 | |
Ira W. Snyder | 30ec5a2 | 2012-01-06 11:29:19 -0800 | [diff] [blame] | 1658 | /* |
| 1659 | * Wait for the flash chip to become ready to write data |
| 1660 | * |
| 1661 | * This is only called during the panic_write() path. When panic_write() |
| 1662 | * is called, the kernel is in the process of a panic, and will soon be |
| 1663 | * dead. Therefore we don't take any locks, and attempt to get access |
| 1664 | * to the chip as soon as possible. |
| 1665 | */ |
| 1666 | static int cfi_amdstd_panic_wait(struct map_info *map, struct flchip *chip, |
| 1667 | unsigned long adr) |
| 1668 | { |
| 1669 | struct cfi_private *cfi = map->fldrv_priv; |
| 1670 | int retries = 10; |
| 1671 | int i; |
| 1672 | |
| 1673 | /* |
| 1674 | * If the driver thinks the chip is idle, and no toggle bits |
| 1675 | * are changing, then the chip is actually idle for sure. |
| 1676 | */ |
| 1677 | if (chip->state == FL_READY && chip_ready(map, adr)) |
| 1678 | return 0; |
| 1679 | |
| 1680 | /* |
| 1681 | * Try several times to reset the chip and then wait for it |
| 1682 | * to become idle. The upper limit of a few milliseconds of |
| 1683 | * delay isn't a big problem: the kernel is dying anyway. It |
| 1684 | * is more important to save the messages. |
| 1685 | */ |
| 1686 | while (retries > 0) { |
| 1687 | const unsigned long timeo = (HZ / 1000) + 1; |
| 1688 | |
| 1689 | /* send the reset command */ |
| 1690 | map_write(map, CMD(0xF0), chip->start); |
| 1691 | |
| 1692 | /* wait for the chip to become ready */ |
| 1693 | for (i = 0; i < jiffies_to_usecs(timeo); i++) { |
| 1694 | if (chip_ready(map, adr)) |
| 1695 | return 0; |
| 1696 | |
| 1697 | udelay(1); |
| 1698 | } |
| 1699 | } |
| 1700 | |
| 1701 | /* the chip never became ready */ |
| 1702 | return -EBUSY; |
| 1703 | } |
| 1704 | |
| 1705 | /* |
| 1706 | * Write out one word of data to a single flash chip during a kernel panic |
| 1707 | * |
| 1708 | * This is only called during the panic_write() path. When panic_write() |
| 1709 | * is called, the kernel is in the process of a panic, and will soon be |
| 1710 | * dead. Therefore we don't take any locks, and attempt to get access |
| 1711 | * to the chip as soon as possible. |
| 1712 | * |
| 1713 | * The implementation of this routine is intentionally similar to |
| 1714 | * do_write_oneword(), in order to ease code maintenance. |
| 1715 | */ |
| 1716 | static int do_panic_write_oneword(struct map_info *map, struct flchip *chip, |
| 1717 | unsigned long adr, map_word datum) |
| 1718 | { |
| 1719 | const unsigned long uWriteTimeout = (HZ / 1000) + 1; |
| 1720 | struct cfi_private *cfi = map->fldrv_priv; |
| 1721 | int retry_cnt = 0; |
| 1722 | map_word oldd; |
| 1723 | int ret = 0; |
| 1724 | int i; |
| 1725 | |
| 1726 | adr += chip->start; |
| 1727 | |
| 1728 | ret = cfi_amdstd_panic_wait(map, chip, adr); |
| 1729 | if (ret) |
| 1730 | return ret; |
| 1731 | |
| 1732 | pr_debug("MTD %s(): PANIC WRITE 0x%.8lx(0x%.8lx)\n", |
| 1733 | __func__, adr, datum.x[0]); |
| 1734 | |
| 1735 | /* |
| 1736 | * Check for a NOP for the case when the datum to write is already |
| 1737 | * present - it saves time and works around buggy chips that corrupt |
| 1738 | * data at other locations when 0xff is written to a location that |
| 1739 | * already contains 0xff. |
| 1740 | */ |
| 1741 | oldd = map_read(map, adr); |
| 1742 | if (map_word_equal(map, oldd, datum)) { |
| 1743 | pr_debug("MTD %s(): NOP\n", __func__); |
| 1744 | goto op_done; |
| 1745 | } |
| 1746 | |
| 1747 | ENABLE_VPP(map); |
| 1748 | |
| 1749 | retry: |
| 1750 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1751 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); |
| 1752 | cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1753 | map_write(map, datum, adr); |
| 1754 | |
| 1755 | for (i = 0; i < jiffies_to_usecs(uWriteTimeout); i++) { |
| 1756 | if (chip_ready(map, adr)) |
| 1757 | break; |
| 1758 | |
| 1759 | udelay(1); |
| 1760 | } |
| 1761 | |
| 1762 | if (!chip_good(map, adr, datum)) { |
| 1763 | /* reset on all failures. */ |
| 1764 | map_write(map, CMD(0xF0), chip->start); |
| 1765 | /* FIXME - should have reset delay before continuing */ |
| 1766 | |
| 1767 | if (++retry_cnt <= MAX_WORD_RETRIES) |
| 1768 | goto retry; |
| 1769 | |
| 1770 | ret = -EIO; |
| 1771 | } |
| 1772 | |
| 1773 | op_done: |
| 1774 | DISABLE_VPP(map); |
| 1775 | return ret; |
| 1776 | } |
| 1777 | |
| 1778 | /* |
| 1779 | * Write out some data during a kernel panic |
| 1780 | * |
| 1781 | * This is used by the mtdoops driver to save the dying messages from a |
| 1782 | * kernel which has panic'd. |
| 1783 | * |
| 1784 | * This routine ignores all of the locking used throughout the rest of the |
| 1785 | * driver, in order to ensure that the data gets written out no matter what |
| 1786 | * state this driver (and the flash chip itself) was in when the kernel crashed. |
| 1787 | * |
| 1788 | * The implementation of this routine is intentionally similar to |
| 1789 | * cfi_amdstd_write_words(), in order to ease code maintenance. |
| 1790 | */ |
| 1791 | static int cfi_amdstd_panic_write(struct mtd_info *mtd, loff_t to, size_t len, |
| 1792 | size_t *retlen, const u_char *buf) |
| 1793 | { |
| 1794 | struct map_info *map = mtd->priv; |
| 1795 | struct cfi_private *cfi = map->fldrv_priv; |
| 1796 | unsigned long ofs, chipstart; |
| 1797 | int ret = 0; |
| 1798 | int chipnum; |
| 1799 | |
Ira W. Snyder | 30ec5a2 | 2012-01-06 11:29:19 -0800 | [diff] [blame] | 1800 | chipnum = to >> cfi->chipshift; |
| 1801 | ofs = to - (chipnum << cfi->chipshift); |
| 1802 | chipstart = cfi->chips[chipnum].start; |
| 1803 | |
| 1804 | /* If it's not bus aligned, do the first byte write */ |
| 1805 | if (ofs & (map_bankwidth(map) - 1)) { |
| 1806 | unsigned long bus_ofs = ofs & ~(map_bankwidth(map) - 1); |
| 1807 | int i = ofs - bus_ofs; |
| 1808 | int n = 0; |
| 1809 | map_word tmp_buf; |
| 1810 | |
| 1811 | ret = cfi_amdstd_panic_wait(map, &cfi->chips[chipnum], bus_ofs); |
| 1812 | if (ret) |
| 1813 | return ret; |
| 1814 | |
| 1815 | /* Load 'tmp_buf' with old contents of flash */ |
| 1816 | tmp_buf = map_read(map, bus_ofs + chipstart); |
| 1817 | |
| 1818 | /* Number of bytes to copy from buffer */ |
| 1819 | n = min_t(int, len, map_bankwidth(map) - i); |
| 1820 | |
| 1821 | tmp_buf = map_word_load_partial(map, tmp_buf, buf, i, n); |
| 1822 | |
| 1823 | ret = do_panic_write_oneword(map, &cfi->chips[chipnum], |
| 1824 | bus_ofs, tmp_buf); |
| 1825 | if (ret) |
| 1826 | return ret; |
| 1827 | |
| 1828 | ofs += n; |
| 1829 | buf += n; |
| 1830 | (*retlen) += n; |
| 1831 | len -= n; |
| 1832 | |
| 1833 | if (ofs >> cfi->chipshift) { |
| 1834 | chipnum++; |
| 1835 | ofs = 0; |
| 1836 | if (chipnum == cfi->numchips) |
| 1837 | return 0; |
| 1838 | } |
| 1839 | } |
| 1840 | |
| 1841 | /* We are now aligned, write as much as possible */ |
| 1842 | while (len >= map_bankwidth(map)) { |
| 1843 | map_word datum; |
| 1844 | |
| 1845 | datum = map_word_load(map, buf); |
| 1846 | |
| 1847 | ret = do_panic_write_oneword(map, &cfi->chips[chipnum], |
| 1848 | ofs, datum); |
| 1849 | if (ret) |
| 1850 | return ret; |
| 1851 | |
| 1852 | ofs += map_bankwidth(map); |
| 1853 | buf += map_bankwidth(map); |
| 1854 | (*retlen) += map_bankwidth(map); |
| 1855 | len -= map_bankwidth(map); |
| 1856 | |
| 1857 | if (ofs >> cfi->chipshift) { |
| 1858 | chipnum++; |
| 1859 | ofs = 0; |
| 1860 | if (chipnum == cfi->numchips) |
| 1861 | return 0; |
| 1862 | |
| 1863 | chipstart = cfi->chips[chipnum].start; |
| 1864 | } |
| 1865 | } |
| 1866 | |
| 1867 | /* Write the trailing bytes if any */ |
| 1868 | if (len & (map_bankwidth(map) - 1)) { |
| 1869 | map_word tmp_buf; |
| 1870 | |
| 1871 | ret = cfi_amdstd_panic_wait(map, &cfi->chips[chipnum], ofs); |
| 1872 | if (ret) |
| 1873 | return ret; |
| 1874 | |
| 1875 | tmp_buf = map_read(map, ofs + chipstart); |
| 1876 | |
| 1877 | tmp_buf = map_word_load_partial(map, tmp_buf, buf, 0, len); |
| 1878 | |
| 1879 | ret = do_panic_write_oneword(map, &cfi->chips[chipnum], |
| 1880 | ofs, tmp_buf); |
| 1881 | if (ret) |
| 1882 | return ret; |
| 1883 | |
| 1884 | (*retlen) += len; |
| 1885 | } |
| 1886 | |
| 1887 | return 0; |
| 1888 | } |
| 1889 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1890 | |
| 1891 | /* |
| 1892 | * Handle devices with one erase region, that only implement |
| 1893 | * the chip erase command. |
| 1894 | */ |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1895 | static int __xipram do_erase_chip(struct map_info *map, struct flchip *chip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1896 | { |
| 1897 | struct cfi_private *cfi = map->fldrv_priv; |
| 1898 | unsigned long timeo = jiffies + HZ; |
| 1899 | unsigned long int adr; |
| 1900 | DECLARE_WAITQUEUE(wait, current); |
| 1901 | int ret = 0; |
| 1902 | |
| 1903 | adr = cfi->addr_unlock1; |
| 1904 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1905 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | ret = get_chip(map, chip, adr, FL_WRITING); |
| 1907 | if (ret) { |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1908 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | return ret; |
| 1910 | } |
| 1911 | |
Brian Norris | 289c052 | 2011-07-19 10:06:09 -0700 | [diff] [blame] | 1912 | pr_debug("MTD %s(): ERASE 0x%.8lx\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | __func__, chip->start ); |
| 1914 | |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1915 | XIP_INVAL_CACHED_RANGE(map, adr, map->size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | ENABLE_VPP(map); |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1917 | xip_disable(map, chip, adr); |
| 1918 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1919 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1920 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); |
| 1921 | cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1922 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1923 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); |
| 1924 | cfi_send_gen_cmd(0x10, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1925 | |
| 1926 | chip->state = FL_ERASING; |
| 1927 | chip->erase_suspended = 0; |
| 1928 | chip->in_progress_block_addr = adr; |
| 1929 | |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1930 | INVALIDATE_CACHE_UDELAY(map, chip, |
| 1931 | adr, map->size, |
| 1932 | chip->erase_time*500); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1933 | |
| 1934 | timeo = jiffies + (HZ*20); |
| 1935 | |
| 1936 | for (;;) { |
| 1937 | if (chip->state != FL_ERASING) { |
| 1938 | /* Someone's suspended the erase. Sleep */ |
| 1939 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1940 | add_wait_queue(&chip->wq, &wait); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1941 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1942 | schedule(); |
| 1943 | remove_wait_queue(&chip->wq, &wait); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1944 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1945 | continue; |
| 1946 | } |
| 1947 | if (chip->erase_suspended) { |
| 1948 | /* This erase was suspended and resumed. |
| 1949 | Adjust the timeout */ |
| 1950 | timeo = jiffies + (HZ*20); /* FIXME */ |
| 1951 | chip->erase_suspended = 0; |
| 1952 | } |
| 1953 | |
| 1954 | if (chip_ready(map, adr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1955 | break; |
| 1956 | |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame] | 1957 | if (time_after(jiffies, timeo)) { |
| 1958 | printk(KERN_WARNING "MTD %s(): software timeout\n", |
| 1959 | __func__ ); |
| 1960 | break; |
| 1961 | } |
| 1962 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1963 | /* Latency issues. Drop the lock, wait a while and retry */ |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1964 | UDELAY(map, chip, adr, 1000000/HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1965 | } |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame] | 1966 | /* Did we succeed? */ |
| 1967 | if (!chip_good(map, adr, map_word_ff(map))) { |
| 1968 | /* reset on all failures. */ |
| 1969 | map_write( map, CMD(0xF0), chip->start ); |
| 1970 | /* FIXME - should have reset delay before continuing */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1971 | |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame] | 1972 | ret = -EIO; |
| 1973 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1974 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1975 | chip->state = FL_READY; |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1976 | xip_enable(map, chip, adr); |
Paul Parsons | e7d9377 | 2012-03-07 14:11:16 +0000 | [diff] [blame] | 1977 | DISABLE_VPP(map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1978 | put_chip(map, chip, adr); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1979 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1980 | |
| 1981 | return ret; |
| 1982 | } |
| 1983 | |
| 1984 | |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 1985 | static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr, int len, void *thunk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1986 | { |
| 1987 | struct cfi_private *cfi = map->fldrv_priv; |
| 1988 | unsigned long timeo = jiffies + HZ; |
| 1989 | DECLARE_WAITQUEUE(wait, current); |
| 1990 | int ret = 0; |
| 1991 | |
| 1992 | adr += chip->start; |
| 1993 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1994 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1995 | ret = get_chip(map, chip, adr, FL_ERASING); |
| 1996 | if (ret) { |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 1997 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1998 | return ret; |
| 1999 | } |
| 2000 | |
Brian Norris | 289c052 | 2011-07-19 10:06:09 -0700 | [diff] [blame] | 2001 | pr_debug("MTD %s(): ERASE 0x%.8lx\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2002 | __func__, adr ); |
| 2003 | |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 2004 | XIP_INVAL_CACHED_RANGE(map, adr, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2005 | ENABLE_VPP(map); |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 2006 | xip_disable(map, chip, adr); |
| 2007 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2008 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 2009 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); |
| 2010 | cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 2011 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 2012 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); |
Guillaume LECERF | 0896804 | 2010-10-26 10:45:23 +0100 | [diff] [blame] | 2013 | map_write(map, cfi->sector_erase_cmd, adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2014 | |
| 2015 | chip->state = FL_ERASING; |
| 2016 | chip->erase_suspended = 0; |
| 2017 | chip->in_progress_block_addr = adr; |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 2018 | |
| 2019 | INVALIDATE_CACHE_UDELAY(map, chip, |
| 2020 | adr, len, |
| 2021 | chip->erase_time*500); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2022 | |
| 2023 | timeo = jiffies + (HZ*20); |
| 2024 | |
| 2025 | for (;;) { |
| 2026 | if (chip->state != FL_ERASING) { |
| 2027 | /* Someone's suspended the erase. Sleep */ |
| 2028 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 2029 | add_wait_queue(&chip->wq, &wait); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2030 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2031 | schedule(); |
| 2032 | remove_wait_queue(&chip->wq, &wait); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2033 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2034 | continue; |
| 2035 | } |
| 2036 | if (chip->erase_suspended) { |
| 2037 | /* This erase was suspended and resumed. |
| 2038 | Adjust the timeout */ |
| 2039 | timeo = jiffies + (HZ*20); /* FIXME */ |
| 2040 | chip->erase_suspended = 0; |
| 2041 | } |
| 2042 | |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 2043 | if (chip_ready(map, adr)) { |
| 2044 | xip_enable(map, chip, adr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2045 | break; |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 2046 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2047 | |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame] | 2048 | if (time_after(jiffies, timeo)) { |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 2049 | xip_enable(map, chip, adr); |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame] | 2050 | printk(KERN_WARNING "MTD %s(): software timeout\n", |
| 2051 | __func__ ); |
| 2052 | break; |
| 2053 | } |
| 2054 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2055 | /* Latency issues. Drop the lock, wait a while and retry */ |
Todd Poynor | 02b15e3 | 2005-06-07 00:04:39 +0100 | [diff] [blame] | 2056 | UDELAY(map, chip, adr, 1000000/HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2057 | } |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame] | 2058 | /* Did we succeed? */ |
Thomas Gleixner | 22fd9a8 | 2005-05-24 15:33:49 +0200 | [diff] [blame] | 2059 | if (!chip_good(map, adr, map_word_ff(map))) { |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame] | 2060 | /* reset on all failures. */ |
| 2061 | map_write( map, CMD(0xF0), chip->start ); |
| 2062 | /* FIXME - should have reset delay before continuing */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2063 | |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame] | 2064 | ret = -EIO; |
| 2065 | } |
| 2066 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2067 | chip->state = FL_READY; |
Paul Parsons | e7d9377 | 2012-03-07 14:11:16 +0000 | [diff] [blame] | 2068 | DISABLE_VPP(map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2069 | put_chip(map, chip, adr); |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2070 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2071 | return ret; |
| 2072 | } |
| 2073 | |
| 2074 | |
Ben Dooks | ce0f33a | 2007-05-28 19:59:00 +0100 | [diff] [blame] | 2075 | static int cfi_amdstd_erase_varsize(struct mtd_info *mtd, struct erase_info *instr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | { |
| 2077 | unsigned long ofs, len; |
| 2078 | int ret; |
| 2079 | |
| 2080 | ofs = instr->addr; |
| 2081 | len = instr->len; |
| 2082 | |
| 2083 | ret = cfi_varsize_frob(mtd, do_erase_oneblock, ofs, len, NULL); |
| 2084 | if (ret) |
| 2085 | return ret; |
| 2086 | |
| 2087 | instr->state = MTD_ERASE_DONE; |
| 2088 | mtd_erase_callback(instr); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2089 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2090 | return 0; |
| 2091 | } |
| 2092 | |
| 2093 | |
| 2094 | static int cfi_amdstd_erase_chip(struct mtd_info *mtd, struct erase_info *instr) |
| 2095 | { |
| 2096 | struct map_info *map = mtd->priv; |
| 2097 | struct cfi_private *cfi = map->fldrv_priv; |
| 2098 | int ret = 0; |
| 2099 | |
| 2100 | if (instr->addr != 0) |
| 2101 | return -EINVAL; |
| 2102 | |
| 2103 | if (instr->len != mtd->size) |
| 2104 | return -EINVAL; |
| 2105 | |
| 2106 | ret = do_erase_chip(map, &cfi->chips[0]); |
| 2107 | if (ret) |
| 2108 | return ret; |
| 2109 | |
| 2110 | instr->state = MTD_ERASE_DONE; |
| 2111 | mtd_erase_callback(instr); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2113 | return 0; |
| 2114 | } |
| 2115 | |
Haavard Skinnemoen | 0165508 | 2006-08-09 11:06:07 +0200 | [diff] [blame] | 2116 | static int do_atmel_lock(struct map_info *map, struct flchip *chip, |
| 2117 | unsigned long adr, int len, void *thunk) |
| 2118 | { |
| 2119 | struct cfi_private *cfi = map->fldrv_priv; |
| 2120 | int ret; |
| 2121 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2122 | mutex_lock(&chip->mutex); |
Haavard Skinnemoen | 0165508 | 2006-08-09 11:06:07 +0200 | [diff] [blame] | 2123 | ret = get_chip(map, chip, adr + chip->start, FL_LOCKING); |
| 2124 | if (ret) |
| 2125 | goto out_unlock; |
| 2126 | chip->state = FL_LOCKING; |
| 2127 | |
Brian Norris | 0a32a10 | 2011-07-19 10:06:10 -0700 | [diff] [blame] | 2128 | pr_debug("MTD %s(): LOCK 0x%08lx len %d\n", __func__, adr, len); |
Haavard Skinnemoen | 0165508 | 2006-08-09 11:06:07 +0200 | [diff] [blame] | 2129 | |
| 2130 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, |
| 2131 | cfi->device_type, NULL); |
| 2132 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, |
| 2133 | cfi->device_type, NULL); |
| 2134 | cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, |
| 2135 | cfi->device_type, NULL); |
| 2136 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, |
| 2137 | cfi->device_type, NULL); |
| 2138 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, |
| 2139 | cfi->device_type, NULL); |
| 2140 | map_write(map, CMD(0x40), chip->start + adr); |
| 2141 | |
| 2142 | chip->state = FL_READY; |
| 2143 | put_chip(map, chip, adr + chip->start); |
| 2144 | ret = 0; |
| 2145 | |
| 2146 | out_unlock: |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2147 | mutex_unlock(&chip->mutex); |
Haavard Skinnemoen | 0165508 | 2006-08-09 11:06:07 +0200 | [diff] [blame] | 2148 | return ret; |
| 2149 | } |
| 2150 | |
| 2151 | static int do_atmel_unlock(struct map_info *map, struct flchip *chip, |
| 2152 | unsigned long adr, int len, void *thunk) |
| 2153 | { |
| 2154 | struct cfi_private *cfi = map->fldrv_priv; |
| 2155 | int ret; |
| 2156 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2157 | mutex_lock(&chip->mutex); |
Haavard Skinnemoen | 0165508 | 2006-08-09 11:06:07 +0200 | [diff] [blame] | 2158 | ret = get_chip(map, chip, adr + chip->start, FL_UNLOCKING); |
| 2159 | if (ret) |
| 2160 | goto out_unlock; |
| 2161 | chip->state = FL_UNLOCKING; |
| 2162 | |
Brian Norris | 0a32a10 | 2011-07-19 10:06:10 -0700 | [diff] [blame] | 2163 | pr_debug("MTD %s(): LOCK 0x%08lx len %d\n", __func__, adr, len); |
Haavard Skinnemoen | 0165508 | 2006-08-09 11:06:07 +0200 | [diff] [blame] | 2164 | |
| 2165 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, |
| 2166 | cfi->device_type, NULL); |
| 2167 | map_write(map, CMD(0x70), adr); |
| 2168 | |
| 2169 | chip->state = FL_READY; |
| 2170 | put_chip(map, chip, adr + chip->start); |
| 2171 | ret = 0; |
| 2172 | |
| 2173 | out_unlock: |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2174 | mutex_unlock(&chip->mutex); |
Haavard Skinnemoen | 0165508 | 2006-08-09 11:06:07 +0200 | [diff] [blame] | 2175 | return ret; |
| 2176 | } |
| 2177 | |
Adrian Hunter | 69423d9 | 2008-12-10 13:37:21 +0000 | [diff] [blame] | 2178 | static int cfi_atmel_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) |
Haavard Skinnemoen | 0165508 | 2006-08-09 11:06:07 +0200 | [diff] [blame] | 2179 | { |
| 2180 | return cfi_varsize_frob(mtd, do_atmel_lock, ofs, len, NULL); |
| 2181 | } |
| 2182 | |
Adrian Hunter | 69423d9 | 2008-12-10 13:37:21 +0000 | [diff] [blame] | 2183 | static int cfi_atmel_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) |
Haavard Skinnemoen | 0165508 | 2006-08-09 11:06:07 +0200 | [diff] [blame] | 2184 | { |
| 2185 | return cfi_varsize_frob(mtd, do_atmel_unlock, ofs, len, NULL); |
| 2186 | } |
| 2187 | |
Stefan Roese | 1648eaa | 2013-01-18 13:10:05 +0100 | [diff] [blame] | 2188 | /* |
| 2189 | * Advanced Sector Protection - PPB (Persistent Protection Bit) locking |
| 2190 | */ |
| 2191 | |
| 2192 | struct ppb_lock { |
| 2193 | struct flchip *chip; |
| 2194 | loff_t offset; |
| 2195 | int locked; |
| 2196 | }; |
| 2197 | |
| 2198 | #define MAX_SECTORS 512 |
| 2199 | |
| 2200 | #define DO_XXLOCK_ONEBLOCK_LOCK ((void *)1) |
| 2201 | #define DO_XXLOCK_ONEBLOCK_UNLOCK ((void *)2) |
| 2202 | #define DO_XXLOCK_ONEBLOCK_GETLOCK ((void *)3) |
| 2203 | |
| 2204 | static int __maybe_unused do_ppb_xxlock(struct map_info *map, |
| 2205 | struct flchip *chip, |
| 2206 | unsigned long adr, int len, void *thunk) |
| 2207 | { |
| 2208 | struct cfi_private *cfi = map->fldrv_priv; |
| 2209 | unsigned long timeo; |
| 2210 | int ret; |
| 2211 | |
| 2212 | mutex_lock(&chip->mutex); |
| 2213 | ret = get_chip(map, chip, adr + chip->start, FL_LOCKING); |
| 2214 | if (ret) { |
| 2215 | mutex_unlock(&chip->mutex); |
| 2216 | return ret; |
| 2217 | } |
| 2218 | |
| 2219 | pr_debug("MTD %s(): XXLOCK 0x%08lx len %d\n", __func__, adr, len); |
| 2220 | |
| 2221 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, |
| 2222 | cfi->device_type, NULL); |
| 2223 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, |
| 2224 | cfi->device_type, NULL); |
| 2225 | /* PPB entry command */ |
| 2226 | cfi_send_gen_cmd(0xC0, cfi->addr_unlock1, chip->start, map, cfi, |
| 2227 | cfi->device_type, NULL); |
| 2228 | |
| 2229 | if (thunk == DO_XXLOCK_ONEBLOCK_LOCK) { |
| 2230 | chip->state = FL_LOCKING; |
| 2231 | map_write(map, CMD(0xA0), chip->start + adr); |
| 2232 | map_write(map, CMD(0x00), chip->start + adr); |
| 2233 | } else if (thunk == DO_XXLOCK_ONEBLOCK_UNLOCK) { |
| 2234 | /* |
| 2235 | * Unlocking of one specific sector is not supported, so we |
| 2236 | * have to unlock all sectors of this device instead |
| 2237 | */ |
| 2238 | chip->state = FL_UNLOCKING; |
| 2239 | map_write(map, CMD(0x80), chip->start); |
| 2240 | map_write(map, CMD(0x30), chip->start); |
| 2241 | } else if (thunk == DO_XXLOCK_ONEBLOCK_GETLOCK) { |
| 2242 | chip->state = FL_JEDEC_QUERY; |
| 2243 | /* Return locked status: 0->locked, 1->unlocked */ |
| 2244 | ret = !cfi_read_query(map, adr); |
| 2245 | } else |
| 2246 | BUG(); |
| 2247 | |
| 2248 | /* |
| 2249 | * Wait for some time as unlocking of all sectors takes quite long |
| 2250 | */ |
| 2251 | timeo = jiffies + msecs_to_jiffies(2000); /* 2s max (un)locking */ |
| 2252 | for (;;) { |
| 2253 | if (chip_ready(map, adr)) |
| 2254 | break; |
| 2255 | |
| 2256 | if (time_after(jiffies, timeo)) { |
| 2257 | printk(KERN_ERR "Waiting for chip to be ready timed out.\n"); |
| 2258 | ret = -EIO; |
| 2259 | break; |
| 2260 | } |
| 2261 | |
| 2262 | UDELAY(map, chip, adr, 1); |
| 2263 | } |
| 2264 | |
| 2265 | /* Exit BC commands */ |
| 2266 | map_write(map, CMD(0x90), chip->start); |
| 2267 | map_write(map, CMD(0x00), chip->start); |
| 2268 | |
| 2269 | chip->state = FL_READY; |
| 2270 | put_chip(map, chip, adr + chip->start); |
| 2271 | mutex_unlock(&chip->mutex); |
| 2272 | |
| 2273 | return ret; |
| 2274 | } |
| 2275 | |
| 2276 | static int __maybe_unused cfi_ppb_lock(struct mtd_info *mtd, loff_t ofs, |
| 2277 | uint64_t len) |
| 2278 | { |
| 2279 | return cfi_varsize_frob(mtd, do_ppb_xxlock, ofs, len, |
| 2280 | DO_XXLOCK_ONEBLOCK_LOCK); |
| 2281 | } |
| 2282 | |
| 2283 | static int __maybe_unused cfi_ppb_unlock(struct mtd_info *mtd, loff_t ofs, |
| 2284 | uint64_t len) |
| 2285 | { |
| 2286 | struct mtd_erase_region_info *regions = mtd->eraseregions; |
| 2287 | struct map_info *map = mtd->priv; |
| 2288 | struct cfi_private *cfi = map->fldrv_priv; |
| 2289 | struct ppb_lock *sect; |
| 2290 | unsigned long adr; |
| 2291 | loff_t offset; |
| 2292 | uint64_t length; |
| 2293 | int chipnum; |
| 2294 | int i; |
| 2295 | int sectors; |
| 2296 | int ret; |
| 2297 | |
| 2298 | /* |
| 2299 | * PPB unlocking always unlocks all sectors of the flash chip. |
| 2300 | * We need to re-lock all previously locked sectors. So lets |
| 2301 | * first check the locking status of all sectors and save |
| 2302 | * it for future use. |
| 2303 | */ |
| 2304 | sect = kzalloc(MAX_SECTORS * sizeof(struct ppb_lock), GFP_KERNEL); |
| 2305 | if (!sect) |
| 2306 | return -ENOMEM; |
| 2307 | |
| 2308 | /* |
| 2309 | * This code to walk all sectors is a slightly modified version |
| 2310 | * of the cfi_varsize_frob() code. |
| 2311 | */ |
| 2312 | i = 0; |
| 2313 | chipnum = 0; |
| 2314 | adr = 0; |
| 2315 | sectors = 0; |
| 2316 | offset = 0; |
| 2317 | length = mtd->size; |
| 2318 | |
| 2319 | while (length) { |
| 2320 | int size = regions[i].erasesize; |
| 2321 | |
| 2322 | /* |
| 2323 | * Only test sectors that shall not be unlocked. The other |
| 2324 | * sectors shall be unlocked, so lets keep their locking |
| 2325 | * status at "unlocked" (locked=0) for the final re-locking. |
| 2326 | */ |
| 2327 | if ((adr < ofs) || (adr >= (ofs + len))) { |
| 2328 | sect[sectors].chip = &cfi->chips[chipnum]; |
| 2329 | sect[sectors].offset = offset; |
| 2330 | sect[sectors].locked = do_ppb_xxlock( |
| 2331 | map, &cfi->chips[chipnum], adr, 0, |
| 2332 | DO_XXLOCK_ONEBLOCK_GETLOCK); |
| 2333 | } |
| 2334 | |
| 2335 | adr += size; |
| 2336 | offset += size; |
| 2337 | length -= size; |
| 2338 | |
| 2339 | if (offset == regions[i].offset + size * regions[i].numblocks) |
| 2340 | i++; |
| 2341 | |
| 2342 | if (adr >> cfi->chipshift) { |
| 2343 | adr = 0; |
| 2344 | chipnum++; |
| 2345 | |
| 2346 | if (chipnum >= cfi->numchips) |
| 2347 | break; |
| 2348 | } |
| 2349 | |
| 2350 | sectors++; |
| 2351 | if (sectors >= MAX_SECTORS) { |
| 2352 | printk(KERN_ERR "Only %d sectors for PPB locking supported!\n", |
| 2353 | MAX_SECTORS); |
| 2354 | kfree(sect); |
| 2355 | return -EINVAL; |
| 2356 | } |
| 2357 | } |
| 2358 | |
| 2359 | /* Now unlock the whole chip */ |
| 2360 | ret = cfi_varsize_frob(mtd, do_ppb_xxlock, ofs, len, |
| 2361 | DO_XXLOCK_ONEBLOCK_UNLOCK); |
| 2362 | if (ret) { |
| 2363 | kfree(sect); |
| 2364 | return ret; |
| 2365 | } |
| 2366 | |
| 2367 | /* |
| 2368 | * PPB unlocking always unlocks all sectors of the flash chip. |
| 2369 | * We need to re-lock all previously locked sectors. |
| 2370 | */ |
| 2371 | for (i = 0; i < sectors; i++) { |
| 2372 | if (sect[i].locked) |
| 2373 | do_ppb_xxlock(map, sect[i].chip, sect[i].offset, 0, |
| 2374 | DO_XXLOCK_ONEBLOCK_LOCK); |
| 2375 | } |
| 2376 | |
| 2377 | kfree(sect); |
| 2378 | return ret; |
| 2379 | } |
| 2380 | |
| 2381 | static int __maybe_unused cfi_ppb_is_locked(struct mtd_info *mtd, loff_t ofs, |
| 2382 | uint64_t len) |
| 2383 | { |
| 2384 | return cfi_varsize_frob(mtd, do_ppb_xxlock, ofs, len, |
| 2385 | DO_XXLOCK_ONEBLOCK_GETLOCK) ? 1 : 0; |
| 2386 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2387 | |
| 2388 | static void cfi_amdstd_sync (struct mtd_info *mtd) |
| 2389 | { |
| 2390 | struct map_info *map = mtd->priv; |
| 2391 | struct cfi_private *cfi = map->fldrv_priv; |
| 2392 | int i; |
| 2393 | struct flchip *chip; |
| 2394 | int ret = 0; |
| 2395 | DECLARE_WAITQUEUE(wait, current); |
| 2396 | |
| 2397 | for (i=0; !ret && i<cfi->numchips; i++) { |
| 2398 | chip = &cfi->chips[i]; |
| 2399 | |
| 2400 | retry: |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2401 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2402 | |
| 2403 | switch(chip->state) { |
| 2404 | case FL_READY: |
| 2405 | case FL_STATUS: |
| 2406 | case FL_CFI_QUERY: |
| 2407 | case FL_JEDEC_QUERY: |
| 2408 | chip->oldstate = chip->state; |
| 2409 | chip->state = FL_SYNCING; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2410 | /* No need to wake_up() on this state change - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2411 | * as the whole point is that nobody can do anything |
| 2412 | * with the chip now anyway. |
| 2413 | */ |
| 2414 | case FL_SYNCING: |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2415 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2416 | break; |
| 2417 | |
| 2418 | default: |
| 2419 | /* Not an idle state */ |
Dmitry Adamushko | f8e30e4 | 2008-04-08 17:41:59 -0700 | [diff] [blame] | 2420 | set_current_state(TASK_UNINTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2421 | add_wait_queue(&chip->wq, &wait); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2422 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2423 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2424 | |
| 2425 | schedule(); |
| 2426 | |
| 2427 | remove_wait_queue(&chip->wq, &wait); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2428 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2429 | goto retry; |
| 2430 | } |
| 2431 | } |
| 2432 | |
| 2433 | /* Unlock the chips again */ |
| 2434 | |
| 2435 | for (i--; i >=0; i--) { |
| 2436 | chip = &cfi->chips[i]; |
| 2437 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2438 | mutex_lock(&chip->mutex); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2439 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2440 | if (chip->state == FL_SYNCING) { |
| 2441 | chip->state = chip->oldstate; |
| 2442 | wake_up(&chip->wq); |
| 2443 | } |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2444 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2445 | } |
| 2446 | } |
| 2447 | |
| 2448 | |
| 2449 | static int cfi_amdstd_suspend(struct mtd_info *mtd) |
| 2450 | { |
| 2451 | struct map_info *map = mtd->priv; |
| 2452 | struct cfi_private *cfi = map->fldrv_priv; |
| 2453 | int i; |
| 2454 | struct flchip *chip; |
| 2455 | int ret = 0; |
| 2456 | |
| 2457 | for (i=0; !ret && i<cfi->numchips; i++) { |
| 2458 | chip = &cfi->chips[i]; |
| 2459 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2460 | mutex_lock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2461 | |
| 2462 | switch(chip->state) { |
| 2463 | case FL_READY: |
| 2464 | case FL_STATUS: |
| 2465 | case FL_CFI_QUERY: |
| 2466 | case FL_JEDEC_QUERY: |
| 2467 | chip->oldstate = chip->state; |
| 2468 | chip->state = FL_PM_SUSPENDED; |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2469 | /* No need to wake_up() on this state change - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2470 | * as the whole point is that nobody can do anything |
| 2471 | * with the chip now anyway. |
| 2472 | */ |
| 2473 | case FL_PM_SUSPENDED: |
| 2474 | break; |
| 2475 | |
| 2476 | default: |
| 2477 | ret = -EAGAIN; |
| 2478 | break; |
| 2479 | } |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2480 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2481 | } |
| 2482 | |
| 2483 | /* Unlock the chips again */ |
| 2484 | |
| 2485 | if (ret) { |
| 2486 | for (i--; i >=0; i--) { |
| 2487 | chip = &cfi->chips[i]; |
| 2488 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2489 | mutex_lock(&chip->mutex); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2490 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2491 | if (chip->state == FL_PM_SUSPENDED) { |
| 2492 | chip->state = chip->oldstate; |
| 2493 | wake_up(&chip->wq); |
| 2494 | } |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2495 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2496 | } |
| 2497 | } |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2498 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2499 | return ret; |
| 2500 | } |
| 2501 | |
| 2502 | |
| 2503 | static void cfi_amdstd_resume(struct mtd_info *mtd) |
| 2504 | { |
| 2505 | struct map_info *map = mtd->priv; |
| 2506 | struct cfi_private *cfi = map->fldrv_priv; |
| 2507 | int i; |
| 2508 | struct flchip *chip; |
| 2509 | |
| 2510 | for (i=0; i<cfi->numchips; i++) { |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2511 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2512 | chip = &cfi->chips[i]; |
| 2513 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2514 | mutex_lock(&chip->mutex); |
Thomas Gleixner | 1f948b4 | 2005-11-07 11:15:37 +0000 | [diff] [blame] | 2515 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2516 | if (chip->state == FL_PM_SUSPENDED) { |
| 2517 | chip->state = FL_READY; |
| 2518 | map_write(map, CMD(0xF0), chip->start); |
| 2519 | wake_up(&chip->wq); |
| 2520 | } |
| 2521 | else |
| 2522 | printk(KERN_ERR "Argh. Chip not in PM_SUSPENDED state upon resume()\n"); |
| 2523 | |
Stefani Seibold | c4e7737 | 2010-04-18 22:46:44 +0200 | [diff] [blame] | 2524 | mutex_unlock(&chip->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2525 | } |
| 2526 | } |
| 2527 | |
Kevin Cernekee | eafe131 | 2010-04-29 10:26:56 -0700 | [diff] [blame] | 2528 | |
| 2529 | /* |
| 2530 | * Ensure that the flash device is put back into read array mode before |
| 2531 | * unloading the driver or rebooting. On some systems, rebooting while |
| 2532 | * the flash is in query/program/erase mode will prevent the CPU from |
| 2533 | * fetching the bootloader code, requiring a hard reset or power cycle. |
| 2534 | */ |
| 2535 | static int cfi_amdstd_reset(struct mtd_info *mtd) |
| 2536 | { |
| 2537 | struct map_info *map = mtd->priv; |
| 2538 | struct cfi_private *cfi = map->fldrv_priv; |
| 2539 | int i, ret; |
| 2540 | struct flchip *chip; |
| 2541 | |
| 2542 | for (i = 0; i < cfi->numchips; i++) { |
| 2543 | |
| 2544 | chip = &cfi->chips[i]; |
| 2545 | |
| 2546 | mutex_lock(&chip->mutex); |
| 2547 | |
| 2548 | ret = get_chip(map, chip, chip->start, FL_SHUTDOWN); |
| 2549 | if (!ret) { |
| 2550 | map_write(map, CMD(0xF0), chip->start); |
| 2551 | chip->state = FL_SHUTDOWN; |
| 2552 | put_chip(map, chip, chip->start); |
| 2553 | } |
| 2554 | |
| 2555 | mutex_unlock(&chip->mutex); |
| 2556 | } |
| 2557 | |
| 2558 | return 0; |
| 2559 | } |
| 2560 | |
| 2561 | |
| 2562 | static int cfi_amdstd_reboot(struct notifier_block *nb, unsigned long val, |
| 2563 | void *v) |
| 2564 | { |
| 2565 | struct mtd_info *mtd; |
| 2566 | |
| 2567 | mtd = container_of(nb, struct mtd_info, reboot_notifier); |
| 2568 | cfi_amdstd_reset(mtd); |
| 2569 | return NOTIFY_DONE; |
| 2570 | } |
| 2571 | |
| 2572 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2573 | static void cfi_amdstd_destroy(struct mtd_info *mtd) |
| 2574 | { |
| 2575 | struct map_info *map = mtd->priv; |
| 2576 | struct cfi_private *cfi = map->fldrv_priv; |
Jesper Juhl | fa67164 | 2005-11-07 01:01:27 -0800 | [diff] [blame] | 2577 | |
Kevin Cernekee | eafe131 | 2010-04-29 10:26:56 -0700 | [diff] [blame] | 2578 | cfi_amdstd_reset(mtd); |
| 2579 | unregister_reboot_notifier(&mtd->reboot_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2580 | kfree(cfi->cmdset_priv); |
| 2581 | kfree(cfi->cfiq); |
| 2582 | kfree(cfi); |
| 2583 | kfree(mtd->eraseregions); |
| 2584 | } |
| 2585 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2586 | MODULE_LICENSE("GPL"); |
| 2587 | MODULE_AUTHOR("Crossnet Co. <info@crossnet.co.jp> et al."); |
| 2588 | MODULE_DESCRIPTION("MTD chip driver for AMD/Fujitsu flash chips"); |
Guillaume LECERF | 8046112 | 2010-05-20 16:54:10 +0200 | [diff] [blame] | 2589 | MODULE_ALIAS("cfi_cmdset_0006"); |
David Woodhouse | 1e804ce | 2010-05-20 16:54:05 +0200 | [diff] [blame] | 2590 | MODULE_ALIAS("cfi_cmdset_0701"); |