11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Common Flash Interface support: 31da177e4SLinus Torvalds * AMD & Fujitsu Standard Vendor Command Set (ID 0x0002) 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Copyright (C) 2000 Crossnet Co. <info@crossnet.co.jp> 61da177e4SLinus Torvalds * Copyright (C) 2004 Arcom Control Systems Ltd <linux@arcom.com> 702b15e34STodd Poynor * Copyright (C) 2005 MontaVista Software Inc. <source@mvista.com> 81da177e4SLinus Torvalds * 91da177e4SLinus Torvalds * 2_by_8 routines added by Simon Munton 101da177e4SLinus Torvalds * 111da177e4SLinus Torvalds * 4_by_16 work by Carolyn J. Smith 121da177e4SLinus Torvalds * 1302b15e34STodd Poynor * XIP support hooks by Vitaly Wool (based on code for Intel flash 1402b15e34STodd Poynor * by Nicolas Pitre) 1502b15e34STodd Poynor * 1687e92c06SChristopher Moore * 25/09/2008 Christopher Moore: TopBottom fixup for many Macronix with CFI V1.0 1787e92c06SChristopher Moore * 181da177e4SLinus Torvalds * Occasionally maintained by Thayne Harbaugh tharbaugh at lnxi dot com 191da177e4SLinus Torvalds * 201da177e4SLinus Torvalds * This code is GPL 211da177e4SLinus Torvalds */ 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds #include <linux/module.h> 241da177e4SLinus Torvalds #include <linux/types.h> 251da177e4SLinus Torvalds #include <linux/kernel.h> 261da177e4SLinus Torvalds #include <linux/sched.h> 271da177e4SLinus Torvalds #include <linux/init.h> 281da177e4SLinus Torvalds #include <asm/io.h> 291da177e4SLinus Torvalds #include <asm/byteorder.h> 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds #include <linux/errno.h> 321da177e4SLinus Torvalds #include <linux/slab.h> 331da177e4SLinus Torvalds #include <linux/delay.h> 341da177e4SLinus Torvalds #include <linux/interrupt.h> 35eafe1311SKevin Cernekee #include <linux/reboot.h> 361da177e4SLinus Torvalds #include <linux/mtd/map.h> 371da177e4SLinus Torvalds #include <linux/mtd/mtd.h> 381da177e4SLinus Torvalds #include <linux/mtd/cfi.h> 3902b15e34STodd Poynor #include <linux/mtd/xip.h> 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds #define AMD_BOOTLOC_BUG 421da177e4SLinus Torvalds #define FORCE_WORD_WRITE 0 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds #define MAX_WORD_RETRIES 3 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds #define SST49LF004B 0x0060 4789072ef9SRyan Jackson #define SST49LF040B 0x0050 48fb4a90bfSEric W. Biedermann #define SST49LF008A 0x005a 490165508cSHaavard Skinnemoen #define AT49BV6416 0x00d6 501da177e4SLinus Torvalds 511da177e4SLinus Torvalds static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); 521da177e4SLinus Torvalds static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); 531da177e4SLinus Torvalds static int cfi_amdstd_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); 541da177e4SLinus Torvalds static int cfi_amdstd_erase_chip(struct mtd_info *, struct erase_info *); 551da177e4SLinus Torvalds static int cfi_amdstd_erase_varsize(struct mtd_info *, struct erase_info *); 561da177e4SLinus Torvalds static void cfi_amdstd_sync (struct mtd_info *); 571da177e4SLinus Torvalds static int cfi_amdstd_suspend (struct mtd_info *); 581da177e4SLinus Torvalds static void cfi_amdstd_resume (struct mtd_info *); 59eafe1311SKevin Cernekee static int cfi_amdstd_reboot(struct notifier_block *, unsigned long, void *); 601da177e4SLinus Torvalds static int cfi_amdstd_secsi_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); 611da177e4SLinus Torvalds 6230ec5a2cSIra W. Snyder static int cfi_amdstd_panic_write(struct mtd_info *mtd, loff_t to, size_t len, 6330ec5a2cSIra W. Snyder size_t *retlen, const u_char *buf); 6430ec5a2cSIra W. Snyder 651da177e4SLinus Torvalds static void cfi_amdstd_destroy(struct mtd_info *); 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds struct mtd_info *cfi_cmdset_0002(struct map_info *, int); 681da177e4SLinus Torvalds static struct mtd_info *cfi_amdstd_setup (struct mtd_info *); 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode); 711da177e4SLinus Torvalds static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr); 721da177e4SLinus Torvalds #include "fwh_lock.h" 731da177e4SLinus Torvalds 7469423d99SAdrian Hunter static int cfi_atmel_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len); 7569423d99SAdrian Hunter static int cfi_atmel_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len); 760165508cSHaavard Skinnemoen 771da177e4SLinus Torvalds static struct mtd_chip_driver cfi_amdstd_chipdrv = { 781da177e4SLinus Torvalds .probe = NULL, /* Not usable directly */ 791da177e4SLinus Torvalds .destroy = cfi_amdstd_destroy, 801da177e4SLinus Torvalds .name = "cfi_cmdset_0002", 811da177e4SLinus Torvalds .module = THIS_MODULE 821da177e4SLinus Torvalds }; 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds /* #define DEBUG_CFI_FEATURES */ 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds #ifdef DEBUG_CFI_FEATURES 891da177e4SLinus Torvalds static void cfi_tell_features(struct cfi_pri_amdstd *extp) 901da177e4SLinus Torvalds { 911da177e4SLinus Torvalds const char* erase_suspend[3] = { 921da177e4SLinus Torvalds "Not supported", "Read only", "Read/write" 931da177e4SLinus Torvalds }; 941da177e4SLinus Torvalds const char* top_bottom[6] = { 951da177e4SLinus Torvalds "No WP", "8x8KiB sectors at top & bottom, no WP", 961da177e4SLinus Torvalds "Bottom boot", "Top boot", 971da177e4SLinus Torvalds "Uniform, Bottom WP", "Uniform, Top WP" 981da177e4SLinus Torvalds }; 991da177e4SLinus Torvalds 1001da177e4SLinus Torvalds printk(" Silicon revision: %d\n", extp->SiliconRevision >> 1); 1011da177e4SLinus Torvalds printk(" Address sensitive unlock: %s\n", 1021da177e4SLinus Torvalds (extp->SiliconRevision & 1) ? "Not required" : "Required"); 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds if (extp->EraseSuspend < ARRAY_SIZE(erase_suspend)) 1051da177e4SLinus Torvalds printk(" Erase Suspend: %s\n", erase_suspend[extp->EraseSuspend]); 1061da177e4SLinus Torvalds else 1071da177e4SLinus Torvalds printk(" Erase Suspend: Unknown value %d\n", extp->EraseSuspend); 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds if (extp->BlkProt == 0) 1101da177e4SLinus Torvalds printk(" Block protection: Not supported\n"); 1111da177e4SLinus Torvalds else 1121da177e4SLinus Torvalds printk(" Block protection: %d sectors per group\n", extp->BlkProt); 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds printk(" Temporary block unprotect: %s\n", 1161da177e4SLinus Torvalds extp->TmpBlkUnprotect ? "Supported" : "Not supported"); 1171da177e4SLinus Torvalds printk(" Block protect/unprotect scheme: %d\n", extp->BlkProtUnprot); 1181da177e4SLinus Torvalds printk(" Number of simultaneous operations: %d\n", extp->SimultaneousOps); 1191da177e4SLinus Torvalds printk(" Burst mode: %s\n", 1201da177e4SLinus Torvalds extp->BurstMode ? "Supported" : "Not supported"); 1211da177e4SLinus Torvalds if (extp->PageMode == 0) 1221da177e4SLinus Torvalds printk(" Page mode: Not supported\n"); 1231da177e4SLinus Torvalds else 1241da177e4SLinus Torvalds printk(" Page mode: %d word page\n", extp->PageMode << 2); 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds printk(" Vpp Supply Minimum Program/Erase Voltage: %d.%d V\n", 1271da177e4SLinus Torvalds extp->VppMin >> 4, extp->VppMin & 0xf); 1281da177e4SLinus Torvalds printk(" Vpp Supply Maximum Program/Erase Voltage: %d.%d V\n", 1291da177e4SLinus Torvalds extp->VppMax >> 4, extp->VppMax & 0xf); 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds if (extp->TopBottom < ARRAY_SIZE(top_bottom)) 1321da177e4SLinus Torvalds printk(" Top/Bottom Boot Block: %s\n", top_bottom[extp->TopBottom]); 1331da177e4SLinus Torvalds else 1341da177e4SLinus Torvalds printk(" Top/Bottom Boot Block: Unknown value %d\n", extp->TopBottom); 1351da177e4SLinus Torvalds } 1361da177e4SLinus Torvalds #endif 1371da177e4SLinus Torvalds 1381da177e4SLinus Torvalds #ifdef AMD_BOOTLOC_BUG 1391da177e4SLinus Torvalds /* Wheee. Bring me the head of someone at AMD. */ 140cc318222SGuillaume LECERF static void fixup_amd_bootblock(struct mtd_info *mtd) 1411da177e4SLinus Torvalds { 1421da177e4SLinus Torvalds struct map_info *map = mtd->priv; 1431da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 1441da177e4SLinus Torvalds struct cfi_pri_amdstd *extp = cfi->cmdset_priv; 1451da177e4SLinus Torvalds __u8 major = extp->MajorVersion; 1461da177e4SLinus Torvalds __u8 minor = extp->MinorVersion; 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds if (((major << 8) | minor) < 0x3131) { 1491da177e4SLinus Torvalds /* CFI version 1.0 => don't trust bootloc */ 15087e92c06SChristopher Moore 151289c0522SBrian Norris pr_debug("%s: JEDEC Vendor ID is 0x%02X Device ID is 0x%02X\n", 15287e92c06SChristopher Moore map->name, cfi->mfr, cfi->id); 15387e92c06SChristopher Moore 15487e92c06SChristopher Moore /* AFAICS all 29LV400 with a bottom boot block have a device ID 15587e92c06SChristopher Moore * of 0x22BA in 16-bit mode and 0xBA in 8-bit mode. 15687e92c06SChristopher Moore * These were badly detected as they have the 0x80 bit set 15787e92c06SChristopher Moore * so treat them as a special case. 15887e92c06SChristopher Moore */ 15987e92c06SChristopher Moore if (((cfi->id == 0xBA) || (cfi->id == 0x22BA)) && 16087e92c06SChristopher Moore 16187e92c06SChristopher Moore /* Macronix added CFI to their 2nd generation 16287e92c06SChristopher Moore * MX29LV400C B/T but AFAICS no other 29LV400 (AMD, 16387e92c06SChristopher Moore * Fujitsu, Spansion, EON, ESI and older Macronix) 16487e92c06SChristopher Moore * has CFI. 16587e92c06SChristopher Moore * 16687e92c06SChristopher Moore * Therefore also check the manufacturer. 16787e92c06SChristopher Moore * This reduces the risk of false detection due to 16887e92c06SChristopher Moore * the 8-bit device ID. 16987e92c06SChristopher Moore */ 170f3e69c65SGuillaume LECERF (cfi->mfr == CFI_MFR_MACRONIX)) { 171289c0522SBrian Norris pr_debug("%s: Macronix MX29LV400C with bottom boot block" 17287e92c06SChristopher Moore " detected\n", map->name); 17387e92c06SChristopher Moore extp->TopBottom = 2; /* bottom boot */ 17487e92c06SChristopher Moore } else 1751da177e4SLinus Torvalds if (cfi->id & 0x80) { 1761da177e4SLinus Torvalds printk(KERN_WARNING "%s: JEDEC Device ID is 0x%02X. Assuming broken CFI table.\n", map->name, cfi->id); 1771da177e4SLinus Torvalds extp->TopBottom = 3; /* top boot */ 1781da177e4SLinus Torvalds } else { 1791da177e4SLinus Torvalds extp->TopBottom = 2; /* bottom boot */ 1801da177e4SLinus Torvalds } 18187e92c06SChristopher Moore 182289c0522SBrian Norris pr_debug("%s: AMD CFI PRI V%c.%c has no boot block field;" 18387e92c06SChristopher Moore " deduced %s from Device ID\n", map->name, major, minor, 18487e92c06SChristopher Moore extp->TopBottom == 2 ? "bottom" : "top"); 1851da177e4SLinus Torvalds } 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds #endif 1881da177e4SLinus Torvalds 189cc318222SGuillaume LECERF static void fixup_use_write_buffers(struct mtd_info *mtd) 1901da177e4SLinus Torvalds { 1911da177e4SLinus Torvalds struct map_info *map = mtd->priv; 1921da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 1931da177e4SLinus Torvalds if (cfi->cfiq->BufWriteTimeoutTyp) { 194289c0522SBrian Norris pr_debug("Using buffer write method\n" ); 1953c3c10bbSArtem Bityutskiy mtd->_write = cfi_amdstd_write_buffers; 1961da177e4SLinus Torvalds } 1971da177e4SLinus Torvalds } 1981da177e4SLinus Torvalds 1995b0c5c2cSHaavard Skinnemoen /* Atmel chips don't use the same PRI format as AMD chips */ 200cc318222SGuillaume LECERF static void fixup_convert_atmel_pri(struct mtd_info *mtd) 2015b0c5c2cSHaavard Skinnemoen { 2025b0c5c2cSHaavard Skinnemoen struct map_info *map = mtd->priv; 2035b0c5c2cSHaavard Skinnemoen struct cfi_private *cfi = map->fldrv_priv; 2045b0c5c2cSHaavard Skinnemoen struct cfi_pri_amdstd *extp = cfi->cmdset_priv; 2055b0c5c2cSHaavard Skinnemoen struct cfi_pri_atmel atmel_pri; 2065b0c5c2cSHaavard Skinnemoen 2075b0c5c2cSHaavard Skinnemoen memcpy(&atmel_pri, extp, sizeof(atmel_pri)); 208de591dacSHåvard Skinnemoen memset((char *)extp + 5, 0, sizeof(*extp) - 5); 2095b0c5c2cSHaavard Skinnemoen 2105b0c5c2cSHaavard Skinnemoen if (atmel_pri.Features & 0x02) 2115b0c5c2cSHaavard Skinnemoen extp->EraseSuspend = 2; 2125b0c5c2cSHaavard Skinnemoen 213be8f78b8SHaavard Skinnemoen /* Some chips got it backwards... */ 214be8f78b8SHaavard Skinnemoen if (cfi->id == AT49BV6416) { 215be8f78b8SHaavard Skinnemoen if (atmel_pri.BottomBoot) 216be8f78b8SHaavard Skinnemoen extp->TopBottom = 3; 217be8f78b8SHaavard Skinnemoen else 218be8f78b8SHaavard Skinnemoen extp->TopBottom = 2; 219be8f78b8SHaavard Skinnemoen } else { 2205b0c5c2cSHaavard Skinnemoen if (atmel_pri.BottomBoot) 2215b0c5c2cSHaavard Skinnemoen extp->TopBottom = 2; 2225b0c5c2cSHaavard Skinnemoen else 2235b0c5c2cSHaavard Skinnemoen extp->TopBottom = 3; 224be8f78b8SHaavard Skinnemoen } 225d10a39d1SHans-Christian Egtvedt 226d10a39d1SHans-Christian Egtvedt /* burst write mode not supported */ 227d10a39d1SHans-Christian Egtvedt cfi->cfiq->BufWriteTimeoutTyp = 0; 228d10a39d1SHans-Christian Egtvedt cfi->cfiq->BufWriteTimeoutMax = 0; 2295b0c5c2cSHaavard Skinnemoen } 2305b0c5c2cSHaavard Skinnemoen 231cc318222SGuillaume LECERF static void fixup_use_secsi(struct mtd_info *mtd) 2321da177e4SLinus Torvalds { 2331da177e4SLinus Torvalds /* Setup for chips with a secsi area */ 2343c3c10bbSArtem Bityutskiy mtd->_read_user_prot_reg = cfi_amdstd_secsi_read; 2353c3c10bbSArtem Bityutskiy mtd->_read_fact_prot_reg = cfi_amdstd_secsi_read; 2361da177e4SLinus Torvalds } 2371da177e4SLinus Torvalds 238cc318222SGuillaume LECERF static void fixup_use_erase_chip(struct mtd_info *mtd) 2391da177e4SLinus Torvalds { 2401da177e4SLinus Torvalds struct map_info *map = mtd->priv; 2411da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 2421da177e4SLinus Torvalds if ((cfi->cfiq->NumEraseRegions == 1) && 2431da177e4SLinus Torvalds ((cfi->cfiq->EraseRegionInfo[0] & 0xffff) == 0)) { 2443c3c10bbSArtem Bityutskiy mtd->_erase = cfi_amdstd_erase_chip; 2451da177e4SLinus Torvalds } 2461da177e4SLinus Torvalds 2471da177e4SLinus Torvalds } 2481da177e4SLinus Torvalds 2490165508cSHaavard Skinnemoen /* 2500165508cSHaavard Skinnemoen * Some Atmel chips (e.g. the AT49BV6416) power-up with all sectors 2510165508cSHaavard Skinnemoen * locked by default. 2520165508cSHaavard Skinnemoen */ 253cc318222SGuillaume LECERF static void fixup_use_atmel_lock(struct mtd_info *mtd) 2540165508cSHaavard Skinnemoen { 2553c3c10bbSArtem Bityutskiy mtd->_lock = cfi_atmel_lock; 2563c3c10bbSArtem Bityutskiy mtd->_unlock = cfi_atmel_unlock; 257e619a75fSJustin Treon mtd->flags |= MTD_POWERUP_LOCK; 2580165508cSHaavard Skinnemoen } 2590165508cSHaavard Skinnemoen 26083dcd3bbSGuillaume LECERF static void fixup_old_sst_eraseregion(struct mtd_info *mtd) 26183dcd3bbSGuillaume LECERF { 26283dcd3bbSGuillaume LECERF struct map_info *map = mtd->priv; 26383dcd3bbSGuillaume LECERF struct cfi_private *cfi = map->fldrv_priv; 26483dcd3bbSGuillaume LECERF 26583dcd3bbSGuillaume LECERF /* 26625985edcSLucas De Marchi * These flashes report two separate eraseblock regions based on the 26783dcd3bbSGuillaume LECERF * sector_erase-size and block_erase-size, although they both operate on the 26883dcd3bbSGuillaume LECERF * same memory. This is not allowed according to CFI, so we just pick the 26983dcd3bbSGuillaume LECERF * sector_erase-size. 27083dcd3bbSGuillaume LECERF */ 27183dcd3bbSGuillaume LECERF cfi->cfiq->NumEraseRegions = 1; 27283dcd3bbSGuillaume LECERF } 27383dcd3bbSGuillaume LECERF 274cc318222SGuillaume LECERF static void fixup_sst39vf(struct mtd_info *mtd) 27583dcd3bbSGuillaume LECERF { 27683dcd3bbSGuillaume LECERF struct map_info *map = mtd->priv; 27783dcd3bbSGuillaume LECERF struct cfi_private *cfi = map->fldrv_priv; 27883dcd3bbSGuillaume LECERF 27983dcd3bbSGuillaume LECERF fixup_old_sst_eraseregion(mtd); 28083dcd3bbSGuillaume LECERF 28183dcd3bbSGuillaume LECERF cfi->addr_unlock1 = 0x5555; 28283dcd3bbSGuillaume LECERF cfi->addr_unlock2 = 0x2AAA; 28383dcd3bbSGuillaume LECERF } 28483dcd3bbSGuillaume LECERF 285cc318222SGuillaume LECERF static void fixup_sst39vf_rev_b(struct mtd_info *mtd) 2865a0563f0SGuillaume LECERF { 2875a0563f0SGuillaume LECERF struct map_info *map = mtd->priv; 2885a0563f0SGuillaume LECERF struct cfi_private *cfi = map->fldrv_priv; 2895a0563f0SGuillaume LECERF 2905a0563f0SGuillaume LECERF fixup_old_sst_eraseregion(mtd); 2915a0563f0SGuillaume LECERF 2925a0563f0SGuillaume LECERF cfi->addr_unlock1 = 0x555; 2935a0563f0SGuillaume LECERF cfi->addr_unlock2 = 0x2AA; 29408968041SGuillaume LECERF 29508968041SGuillaume LECERF cfi->sector_erase_cmd = CMD(0x50); 2965a0563f0SGuillaume LECERF } 2975a0563f0SGuillaume LECERF 298cc318222SGuillaume LECERF static void fixup_sst38vf640x_sectorsize(struct mtd_info *mtd) 2999fc05fcaSGuillaume LECERF { 3009fc05fcaSGuillaume LECERF struct map_info *map = mtd->priv; 3019fc05fcaSGuillaume LECERF struct cfi_private *cfi = map->fldrv_priv; 3029fc05fcaSGuillaume LECERF 303cc318222SGuillaume LECERF fixup_sst39vf_rev_b(mtd); 3049fc05fcaSGuillaume LECERF 3059fc05fcaSGuillaume LECERF /* 3069fc05fcaSGuillaume LECERF * CFI reports 1024 sectors (0x03ff+1) of 64KBytes (0x0100*256) where 3079fc05fcaSGuillaume LECERF * it should report a size of 8KBytes (0x0020*256). 3089fc05fcaSGuillaume LECERF */ 3099fc05fcaSGuillaume LECERF cfi->cfiq->EraseRegionInfo[0] = 0x002003ff; 3109fc05fcaSGuillaume LECERF pr_warning("%s: Bad 38VF640x CFI data; adjusting sector size from 64 to 8KiB\n", mtd->name); 3119fc05fcaSGuillaume LECERF } 3129fc05fcaSGuillaume LECERF 313cc318222SGuillaume LECERF static void fixup_s29gl064n_sectors(struct mtd_info *mtd) 31470b07255STrent Piepho { 31570b07255STrent Piepho struct map_info *map = mtd->priv; 31670b07255STrent Piepho struct cfi_private *cfi = map->fldrv_priv; 31770b07255STrent Piepho 31870b07255STrent Piepho if ((cfi->cfiq->EraseRegionInfo[0] & 0xffff) == 0x003f) { 31970b07255STrent Piepho cfi->cfiq->EraseRegionInfo[0] |= 0x0040; 3205df41de5SDavid Woodhouse pr_warning("%s: Bad S29GL064N CFI data; adjust from 64 to 128 sectors\n", mtd->name); 32170b07255STrent Piepho } 32270b07255STrent Piepho } 32370b07255STrent Piepho 324cc318222SGuillaume LECERF static void fixup_s29gl032n_sectors(struct mtd_info *mtd) 32570b07255STrent Piepho { 32670b07255STrent Piepho struct map_info *map = mtd->priv; 32770b07255STrent Piepho struct cfi_private *cfi = map->fldrv_priv; 32870b07255STrent Piepho 32970b07255STrent Piepho if ((cfi->cfiq->EraseRegionInfo[1] & 0xffff) == 0x007e) { 33070b07255STrent Piepho cfi->cfiq->EraseRegionInfo[1] &= ~0x0040; 3315df41de5SDavid Woodhouse pr_warning("%s: Bad S29GL032N CFI data; adjust from 127 to 63 sectors\n", mtd->name); 33270b07255STrent Piepho } 33370b07255STrent Piepho } 33470b07255STrent Piepho 33543dc03c7SJavier Martin static void fixup_s29ns512p_sectors(struct mtd_info *mtd) 33643dc03c7SJavier Martin { 33743dc03c7SJavier Martin struct map_info *map = mtd->priv; 33843dc03c7SJavier Martin struct cfi_private *cfi = map->fldrv_priv; 33943dc03c7SJavier Martin 34043dc03c7SJavier Martin /* 34143dc03c7SJavier Martin * S29NS512P flash uses more than 8bits to report number of sectors, 34243dc03c7SJavier Martin * which is not permitted by CFI. 34343dc03c7SJavier Martin */ 34443dc03c7SJavier Martin cfi->cfiq->EraseRegionInfo[0] = 0x020001ff; 3455df41de5SDavid Woodhouse pr_warning("%s: Bad S29NS512P CFI data; adjust to 512 sectors\n", mtd->name); 34643dc03c7SJavier Martin } 34743dc03c7SJavier Martin 34883dcd3bbSGuillaume LECERF /* Used to fix CFI-Tables of chips without Extended Query Tables */ 34983dcd3bbSGuillaume LECERF static struct cfi_fixup cfi_nopri_fixup_table[] = { 350cc318222SGuillaume LECERF { CFI_MFR_SST, 0x234a, fixup_sst39vf }, /* SST39VF1602 */ 351cc318222SGuillaume LECERF { CFI_MFR_SST, 0x234b, fixup_sst39vf }, /* SST39VF1601 */ 352cc318222SGuillaume LECERF { CFI_MFR_SST, 0x235a, fixup_sst39vf }, /* SST39VF3202 */ 353cc318222SGuillaume LECERF { CFI_MFR_SST, 0x235b, fixup_sst39vf }, /* SST39VF3201 */ 354cc318222SGuillaume LECERF { CFI_MFR_SST, 0x235c, fixup_sst39vf_rev_b }, /* SST39VF3202B */ 355cc318222SGuillaume LECERF { CFI_MFR_SST, 0x235d, fixup_sst39vf_rev_b }, /* SST39VF3201B */ 356cc318222SGuillaume LECERF { CFI_MFR_SST, 0x236c, fixup_sst39vf_rev_b }, /* SST39VF6402B */ 357cc318222SGuillaume LECERF { CFI_MFR_SST, 0x236d, fixup_sst39vf_rev_b }, /* SST39VF6401B */ 358cc318222SGuillaume LECERF { 0, 0, NULL } 35983dcd3bbSGuillaume LECERF }; 36083dcd3bbSGuillaume LECERF 3611da177e4SLinus Torvalds static struct cfi_fixup cfi_fixup_table[] = { 362cc318222SGuillaume LECERF { CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri }, 3631da177e4SLinus Torvalds #ifdef AMD_BOOTLOC_BUG 364cc318222SGuillaume LECERF { CFI_MFR_AMD, CFI_ID_ANY, fixup_amd_bootblock }, 3651065cda8SSteffen Sledz { CFI_MFR_AMIC, CFI_ID_ANY, fixup_amd_bootblock }, 366cc318222SGuillaume LECERF { CFI_MFR_MACRONIX, CFI_ID_ANY, fixup_amd_bootblock }, 3671da177e4SLinus Torvalds #endif 368cc318222SGuillaume LECERF { CFI_MFR_AMD, 0x0050, fixup_use_secsi }, 369cc318222SGuillaume LECERF { CFI_MFR_AMD, 0x0053, fixup_use_secsi }, 370cc318222SGuillaume LECERF { CFI_MFR_AMD, 0x0055, fixup_use_secsi }, 371cc318222SGuillaume LECERF { CFI_MFR_AMD, 0x0056, fixup_use_secsi }, 372cc318222SGuillaume LECERF { CFI_MFR_AMD, 0x005C, fixup_use_secsi }, 373cc318222SGuillaume LECERF { CFI_MFR_AMD, 0x005F, fixup_use_secsi }, 374cc318222SGuillaume LECERF { CFI_MFR_AMD, 0x0c01, fixup_s29gl064n_sectors }, 375cc318222SGuillaume LECERF { CFI_MFR_AMD, 0x1301, fixup_s29gl064n_sectors }, 376cc318222SGuillaume LECERF { CFI_MFR_AMD, 0x1a00, fixup_s29gl032n_sectors }, 377cc318222SGuillaume LECERF { CFI_MFR_AMD, 0x1a01, fixup_s29gl032n_sectors }, 37843dc03c7SJavier Martin { CFI_MFR_AMD, 0x3f00, fixup_s29ns512p_sectors }, 379cc318222SGuillaume LECERF { CFI_MFR_SST, 0x536a, fixup_sst38vf640x_sectorsize }, /* SST38VF6402 */ 380cc318222SGuillaume LECERF { CFI_MFR_SST, 0x536b, fixup_sst38vf640x_sectorsize }, /* SST38VF6401 */ 381cc318222SGuillaume LECERF { CFI_MFR_SST, 0x536c, fixup_sst38vf640x_sectorsize }, /* SST38VF6404 */ 382cc318222SGuillaume LECERF { CFI_MFR_SST, 0x536d, fixup_sst38vf640x_sectorsize }, /* SST38VF6403 */ 3831da177e4SLinus Torvalds #if !FORCE_WORD_WRITE 384cc318222SGuillaume LECERF { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers }, 3851da177e4SLinus Torvalds #endif 386cc318222SGuillaume LECERF { 0, 0, NULL } 3871da177e4SLinus Torvalds }; 3881da177e4SLinus Torvalds static struct cfi_fixup jedec_fixup_table[] = { 389cc318222SGuillaume LECERF { CFI_MFR_SST, SST49LF004B, fixup_use_fwh_lock }, 390cc318222SGuillaume LECERF { CFI_MFR_SST, SST49LF040B, fixup_use_fwh_lock }, 391cc318222SGuillaume LECERF { CFI_MFR_SST, SST49LF008A, fixup_use_fwh_lock }, 392cc318222SGuillaume LECERF { 0, 0, NULL } 3931da177e4SLinus Torvalds }; 3941da177e4SLinus Torvalds 3951da177e4SLinus Torvalds static struct cfi_fixup fixup_table[] = { 3961da177e4SLinus Torvalds /* The CFI vendor ids and the JEDEC vendor IDs appear 3971da177e4SLinus Torvalds * to be common. It is like the devices id's are as 3981da177e4SLinus Torvalds * well. This table is to pick all cases where 3991da177e4SLinus Torvalds * we know that is the case. 4001da177e4SLinus Torvalds */ 401cc318222SGuillaume LECERF { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_erase_chip }, 402cc318222SGuillaume LECERF { CFI_MFR_ATMEL, AT49BV6416, fixup_use_atmel_lock }, 403cc318222SGuillaume LECERF { 0, 0, NULL } 4041da177e4SLinus Torvalds }; 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds 407fefae48bSWolfgang Grandegger static void cfi_fixup_major_minor(struct cfi_private *cfi, 408fefae48bSWolfgang Grandegger struct cfi_pri_amdstd *extp) 409fefae48bSWolfgang Grandegger { 410e6372763SGuillaume LECERF if (cfi->mfr == CFI_MFR_SAMSUNG) { 411e8953b73SGuillaume LECERF if ((extp->MajorVersion == '0' && extp->MinorVersion == '0') || 412e8953b73SGuillaume LECERF (extp->MajorVersion == '3' && extp->MinorVersion == '3')) { 413e6372763SGuillaume LECERF /* 414e6372763SGuillaume LECERF * Samsung K8P2815UQB and K8D6x16UxM chips 415e6372763SGuillaume LECERF * report major=0 / minor=0. 416e8953b73SGuillaume LECERF * K8D3x16UxC chips report major=3 / minor=3. 417e6372763SGuillaume LECERF */ 418e6372763SGuillaume LECERF printk(KERN_NOTICE " Fixing Samsung's Amd/Fujitsu" 419e6372763SGuillaume LECERF " Extended Query version to 1.%c\n", 420e6372763SGuillaume LECERF extp->MinorVersion); 421fefae48bSWolfgang Grandegger extp->MajorVersion = '1'; 422e6372763SGuillaume LECERF } 423e6372763SGuillaume LECERF } 424e6372763SGuillaume LECERF 4259fc05fcaSGuillaume LECERF /* 4269fc05fcaSGuillaume LECERF * SST 38VF640x chips report major=0xFF / minor=0xFF. 4279fc05fcaSGuillaume LECERF */ 4289fc05fcaSGuillaume LECERF if (cfi->mfr == CFI_MFR_SST && (cfi->id >> 4) == 0x0536) { 4299fc05fcaSGuillaume LECERF extp->MajorVersion = '1'; 4309fc05fcaSGuillaume LECERF extp->MinorVersion = '0'; 4319fc05fcaSGuillaume LECERF } 432fefae48bSWolfgang Grandegger } 433fefae48bSWolfgang Grandegger 43442096288SGerlando Falauto static int is_m29ew(struct cfi_private *cfi) 43542096288SGerlando Falauto { 43642096288SGerlando Falauto if (cfi->mfr == CFI_MFR_INTEL && 43742096288SGerlando Falauto ((cfi->device_type == CFI_DEVICETYPE_X8 && (cfi->id & 0xff) == 0x7e) || 43842096288SGerlando Falauto (cfi->device_type == CFI_DEVICETYPE_X16 && cfi->id == 0x227e))) 43942096288SGerlando Falauto return 1; 44042096288SGerlando Falauto return 0; 44142096288SGerlando Falauto } 44242096288SGerlando Falauto 44342096288SGerlando Falauto /* 44442096288SGerlando Falauto * From TN-13-07: Patching the Linux Kernel and U-Boot for M29 Flash, page 20: 44542096288SGerlando Falauto * Some revisions of the M29EW suffer from erase suspend hang ups. In 44642096288SGerlando Falauto * particular, it can occur when the sequence 44742096288SGerlando Falauto * Erase Confirm -> Suspend -> Program -> Resume 44842096288SGerlando Falauto * causes a lockup due to internal timing issues. The consequence is that the 44942096288SGerlando Falauto * erase cannot be resumed without inserting a dummy command after programming 45042096288SGerlando Falauto * and prior to resuming. [...] The work-around is to issue a dummy write cycle 45142096288SGerlando Falauto * that writes an F0 command code before the RESUME command. 45242096288SGerlando Falauto */ 45342096288SGerlando Falauto static void cfi_fixup_m29ew_erase_suspend(struct map_info *map, 45442096288SGerlando Falauto unsigned long adr) 45542096288SGerlando Falauto { 45642096288SGerlando Falauto struct cfi_private *cfi = map->fldrv_priv; 45742096288SGerlando Falauto /* before resume, insert a dummy 0xF0 cycle for Micron M29EW devices */ 45842096288SGerlando Falauto if (is_m29ew(cfi)) 45942096288SGerlando Falauto map_write(map, CMD(0xF0), adr); 46042096288SGerlando Falauto } 46142096288SGerlando Falauto 46242096288SGerlando Falauto /* 46342096288SGerlando Falauto * From TN-13-07: Patching the Linux Kernel and U-Boot for M29 Flash, page 22: 46442096288SGerlando Falauto * 46542096288SGerlando Falauto * Some revisions of the M29EW (for example, A1 and A2 step revisions) 46642096288SGerlando Falauto * are affected by a problem that could cause a hang up when an ERASE SUSPEND 46742096288SGerlando Falauto * command is issued after an ERASE RESUME operation without waiting for a 46842096288SGerlando Falauto * minimum delay. The result is that once the ERASE seems to be completed 46942096288SGerlando Falauto * (no bits are toggling), the contents of the Flash memory block on which 47042096288SGerlando Falauto * the erase was ongoing could be inconsistent with the expected values 47142096288SGerlando Falauto * (typically, the array value is stuck to the 0xC0, 0xC4, 0x80, or 0x84 47242096288SGerlando Falauto * values), causing a consequent failure of the ERASE operation. 47342096288SGerlando Falauto * The occurrence of this issue could be high, especially when file system 47442096288SGerlando Falauto * operations on the Flash are intensive. As a result, it is recommended 47542096288SGerlando Falauto * that a patch be applied. Intensive file system operations can cause many 47642096288SGerlando Falauto * calls to the garbage routine to free Flash space (also by erasing physical 47742096288SGerlando Falauto * Flash blocks) and as a result, many consecutive SUSPEND and RESUME 47842096288SGerlando Falauto * commands can occur. The problem disappears when a delay is inserted after 47942096288SGerlando Falauto * the RESUME command by using the udelay() function available in Linux. 48042096288SGerlando Falauto * The DELAY value must be tuned based on the customer's platform. 48142096288SGerlando Falauto * The maximum value that fixes the problem in all cases is 500us. 48242096288SGerlando Falauto * But, in our experience, a delay of 30 µs to 50 µs is sufficient 48342096288SGerlando Falauto * in most cases. 48442096288SGerlando Falauto * We have chosen 500µs because this latency is acceptable. 48542096288SGerlando Falauto */ 48642096288SGerlando Falauto static void cfi_fixup_m29ew_delay_after_resume(struct cfi_private *cfi) 48742096288SGerlando Falauto { 48842096288SGerlando Falauto /* 48942096288SGerlando Falauto * Resolving the Delay After Resume Issue see Micron TN-13-07 49042096288SGerlando Falauto * Worst case delay must be 500µs but 30-50µs should be ok as well 49142096288SGerlando Falauto */ 49242096288SGerlando Falauto if (is_m29ew(cfi)) 49342096288SGerlando Falauto cfi_udelay(500); 49442096288SGerlando Falauto } 49542096288SGerlando Falauto 4961da177e4SLinus Torvalds struct mtd_info *cfi_cmdset_0002(struct map_info *map, int primary) 4971da177e4SLinus Torvalds { 4981da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 4991da177e4SLinus Torvalds struct mtd_info *mtd; 5001da177e4SLinus Torvalds int i; 5011da177e4SLinus Torvalds 50295b93a0cSBurman Yan mtd = kzalloc(sizeof(*mtd), GFP_KERNEL); 5031da177e4SLinus Torvalds if (!mtd) { 5041da177e4SLinus Torvalds printk(KERN_WARNING "Failed to allocate memory for MTD device\n"); 5051da177e4SLinus Torvalds return NULL; 5061da177e4SLinus Torvalds } 5071da177e4SLinus Torvalds mtd->priv = map; 5081da177e4SLinus Torvalds mtd->type = MTD_NORFLASH; 5091da177e4SLinus Torvalds 5101da177e4SLinus Torvalds /* Fill in the default mtd operations */ 5113c3c10bbSArtem Bityutskiy mtd->_erase = cfi_amdstd_erase_varsize; 5123c3c10bbSArtem Bityutskiy mtd->_write = cfi_amdstd_write_words; 5133c3c10bbSArtem Bityutskiy mtd->_read = cfi_amdstd_read; 5143c3c10bbSArtem Bityutskiy mtd->_sync = cfi_amdstd_sync; 5153c3c10bbSArtem Bityutskiy mtd->_suspend = cfi_amdstd_suspend; 5163c3c10bbSArtem Bityutskiy mtd->_resume = cfi_amdstd_resume; 5171da177e4SLinus Torvalds mtd->flags = MTD_CAP_NORFLASH; 5181da177e4SLinus Torvalds mtd->name = map->name; 519783ed81fSArtem B. Bityutskiy mtd->writesize = 1; 52013ce77f4SAnatolij Gustschin mtd->writebufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; 521d261c72aSAnatolij Gustschin 5220a32a102SBrian Norris pr_debug("MTD %s(): write buffer size %d\n", __func__, 5230a32a102SBrian Norris mtd->writebufsize); 5241da177e4SLinus Torvalds 5253c3c10bbSArtem Bityutskiy mtd->_panic_write = cfi_amdstd_panic_write; 526eafe1311SKevin Cernekee mtd->reboot_notifier.notifier_call = cfi_amdstd_reboot; 527eafe1311SKevin Cernekee 5281da177e4SLinus Torvalds if (cfi->cfi_mode==CFI_MODE_CFI){ 5291da177e4SLinus Torvalds unsigned char bootloc; 5301da177e4SLinus Torvalds __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR; 5311da177e4SLinus Torvalds struct cfi_pri_amdstd *extp; 5321da177e4SLinus Torvalds 5331da177e4SLinus Torvalds extp = (struct cfi_pri_amdstd*)cfi_read_pri(map, adr, sizeof(*extp), "Amd/Fujitsu"); 534564b8497SGuillaume LECERF if (extp) { 535564b8497SGuillaume LECERF /* 536564b8497SGuillaume LECERF * It's a real CFI chip, not one for which the probe 537564b8497SGuillaume LECERF * routine faked a CFI structure. 538564b8497SGuillaume LECERF */ 539fefae48bSWolfgang Grandegger cfi_fixup_major_minor(cfi, extp); 540fefae48bSWolfgang Grandegger 541e17f47a1SGuillaume LECERF /* 542c9ddab25SGernot Hoyler * Valid primary extension versions are: 1.0, 1.1, 1.2, 1.3, 1.4, 1.5 543631dd1a8SJustin P. Mattock * see: http://cs.ozerki.net/zap/pub/axim-x5/docs/cfi_r20.pdf, page 19 544631dd1a8SJustin P. Mattock * http://www.spansion.com/Support/AppNotes/cfi_100_20011201.pdf 5455da19532SGuillaume LECERF * http://www.spansion.com/Support/Datasheets/s29ws-p_00_a12_e.pdf 546c9ddab25SGernot Hoyler * http://www.spansion.com/Support/Datasheets/S29GL_128S_01GS_00_02_e.pdf 547e17f47a1SGuillaume LECERF */ 548d88f977bSTodd Poynor if (extp->MajorVersion != '1' || 549c9ddab25SGernot Hoyler (extp->MajorVersion == '1' && (extp->MinorVersion < '0' || extp->MinorVersion > '5'))) { 550d88f977bSTodd Poynor printk(KERN_ERR " Unknown Amd/Fujitsu Extended Query " 551e17f47a1SGuillaume LECERF "version %c.%c (%#02x/%#02x).\n", 552e17f47a1SGuillaume LECERF extp->MajorVersion, extp->MinorVersion, 553e17f47a1SGuillaume LECERF extp->MajorVersion, extp->MinorVersion); 554d88f977bSTodd Poynor kfree(extp); 555d88f977bSTodd Poynor kfree(mtd); 556d88f977bSTodd Poynor return NULL; 557d88f977bSTodd Poynor } 558d88f977bSTodd Poynor 559e17f47a1SGuillaume LECERF printk(KERN_INFO " Amd/Fujitsu Extended Query version %c.%c.\n", 560e17f47a1SGuillaume LECERF extp->MajorVersion, extp->MinorVersion); 561e17f47a1SGuillaume LECERF 5621da177e4SLinus Torvalds /* Install our own private info structure */ 5631da177e4SLinus Torvalds cfi->cmdset_priv = extp; 5641da177e4SLinus Torvalds 5651da177e4SLinus Torvalds /* Apply cfi device specific fixups */ 5661da177e4SLinus Torvalds cfi_fixup(mtd, cfi_fixup_table); 5671da177e4SLinus Torvalds 5681da177e4SLinus Torvalds #ifdef DEBUG_CFI_FEATURES 5691da177e4SLinus Torvalds /* Tell the user about it in lots of lovely detail */ 5701da177e4SLinus Torvalds cfi_tell_features(extp); 5711da177e4SLinus Torvalds #endif 5721da177e4SLinus Torvalds 5731da177e4SLinus Torvalds bootloc = extp->TopBottom; 574412da2f6SDavid Woodhouse if ((bootloc < 2) || (bootloc > 5)) { 575412da2f6SDavid Woodhouse printk(KERN_WARNING "%s: CFI contains unrecognised boot " 576412da2f6SDavid Woodhouse "bank location (%d). Assuming bottom.\n", 577abab7ebfSDavid Woodhouse map->name, bootloc); 5781da177e4SLinus Torvalds bootloc = 2; 5791da177e4SLinus Torvalds } 5801da177e4SLinus Torvalds 5811da177e4SLinus Torvalds if (bootloc == 3 && cfi->cfiq->NumEraseRegions > 1) { 582412da2f6SDavid Woodhouse printk(KERN_WARNING "%s: Swapping erase regions for top-boot CFI table.\n", map->name); 5831da177e4SLinus Torvalds 5841da177e4SLinus Torvalds for (i=0; i<cfi->cfiq->NumEraseRegions / 2; i++) { 5851da177e4SLinus Torvalds int j = (cfi->cfiq->NumEraseRegions-1)-i; 5861da177e4SLinus Torvalds __u32 swap; 5871da177e4SLinus Torvalds 5881da177e4SLinus Torvalds swap = cfi->cfiq->EraseRegionInfo[i]; 5891da177e4SLinus Torvalds cfi->cfiq->EraseRegionInfo[i] = cfi->cfiq->EraseRegionInfo[j]; 5901da177e4SLinus Torvalds cfi->cfiq->EraseRegionInfo[j] = swap; 5911da177e4SLinus Torvalds } 5921da177e4SLinus Torvalds } 5931da177e4SLinus Torvalds /* Set the default CFI lock/unlock addresses */ 5941da177e4SLinus Torvalds cfi->addr_unlock1 = 0x555; 5951da177e4SLinus Torvalds cfi->addr_unlock2 = 0x2aa; 596564b8497SGuillaume LECERF } 59783dcd3bbSGuillaume LECERF cfi_fixup(mtd, cfi_nopri_fixup_table); 598564b8497SGuillaume LECERF 599564b8497SGuillaume LECERF if (!cfi->addr_unlock1 || !cfi->addr_unlock2) { 600564b8497SGuillaume LECERF kfree(mtd); 601564b8497SGuillaume LECERF return NULL; 602564b8497SGuillaume LECERF } 6031da177e4SLinus Torvalds 6041da177e4SLinus Torvalds } /* CFI mode */ 6051da177e4SLinus Torvalds else if (cfi->cfi_mode == CFI_MODE_JEDEC) { 6061da177e4SLinus Torvalds /* Apply jedec specific fixups */ 6071da177e4SLinus Torvalds cfi_fixup(mtd, jedec_fixup_table); 6081da177e4SLinus Torvalds } 6091da177e4SLinus Torvalds /* Apply generic fixups */ 6101da177e4SLinus Torvalds cfi_fixup(mtd, fixup_table); 6111da177e4SLinus Torvalds 6121da177e4SLinus Torvalds for (i=0; i< cfi->numchips; i++) { 6131da177e4SLinus Torvalds cfi->chips[i].word_write_time = 1<<cfi->cfiq->WordWriteTimeoutTyp; 6141da177e4SLinus Torvalds cfi->chips[i].buffer_write_time = 1<<cfi->cfiq->BufWriteTimeoutTyp; 6151da177e4SLinus Torvalds cfi->chips[i].erase_time = 1<<cfi->cfiq->BlockEraseTimeoutTyp; 61683d48091SVijay Sampath cfi->chips[i].ref_point_counter = 0; 61783d48091SVijay Sampath init_waitqueue_head(&(cfi->chips[i].wq)); 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds map->fldrv = &cfi_amdstd_chipdrv; 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvalds return cfi_amdstd_setup(mtd); 6231da177e4SLinus Torvalds } 62480461128SGuillaume LECERF struct mtd_info *cfi_cmdset_0006(struct map_info *map, int primary) __attribute__((alias("cfi_cmdset_0002"))); 6251e804cecSDavid Woodhouse struct mtd_info *cfi_cmdset_0701(struct map_info *map, int primary) __attribute__((alias("cfi_cmdset_0002"))); 62683ea4ef2SDavid Woodhouse EXPORT_SYMBOL_GPL(cfi_cmdset_0002); 62780461128SGuillaume LECERF EXPORT_SYMBOL_GPL(cfi_cmdset_0006); 6281e804cecSDavid Woodhouse EXPORT_SYMBOL_GPL(cfi_cmdset_0701); 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds static struct mtd_info *cfi_amdstd_setup(struct mtd_info *mtd) 6311da177e4SLinus Torvalds { 6321da177e4SLinus Torvalds struct map_info *map = mtd->priv; 6331da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 6341da177e4SLinus Torvalds unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave; 6351da177e4SLinus Torvalds unsigned long offset = 0; 6361da177e4SLinus Torvalds int i,j; 6371da177e4SLinus Torvalds 6381da177e4SLinus Torvalds printk(KERN_NOTICE "number of %s chips: %d\n", 6391da177e4SLinus Torvalds (cfi->cfi_mode == CFI_MODE_CFI)?"CFI":"JEDEC",cfi->numchips); 6401da177e4SLinus Torvalds /* Select the correct geometry setup */ 6411da177e4SLinus Torvalds mtd->size = devsize * cfi->numchips; 6421da177e4SLinus Torvalds 6431da177e4SLinus Torvalds mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips; 6441da177e4SLinus Torvalds mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) 6451da177e4SLinus Torvalds * mtd->numeraseregions, GFP_KERNEL); 6461da177e4SLinus Torvalds if (!mtd->eraseregions) { 6471da177e4SLinus Torvalds printk(KERN_WARNING "Failed to allocate memory for MTD erase region info\n"); 6481da177e4SLinus Torvalds goto setup_err; 6491da177e4SLinus Torvalds } 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvalds for (i=0; i<cfi->cfiq->NumEraseRegions; i++) { 6521da177e4SLinus Torvalds unsigned long ernum, ersize; 6531da177e4SLinus Torvalds ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave; 6541da177e4SLinus Torvalds ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1; 6551da177e4SLinus Torvalds 6561da177e4SLinus Torvalds if (mtd->erasesize < ersize) { 6571da177e4SLinus Torvalds mtd->erasesize = ersize; 6581da177e4SLinus Torvalds } 6591da177e4SLinus Torvalds for (j=0; j<cfi->numchips; j++) { 6601da177e4SLinus Torvalds mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset; 6611da177e4SLinus Torvalds mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize; 6621da177e4SLinus Torvalds mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum; 6631da177e4SLinus Torvalds } 6641da177e4SLinus Torvalds offset += (ersize * ernum); 6651da177e4SLinus Torvalds } 6661da177e4SLinus Torvalds if (offset != devsize) { 6671da177e4SLinus Torvalds /* Argh */ 6681da177e4SLinus Torvalds printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize); 6691da177e4SLinus Torvalds goto setup_err; 6701da177e4SLinus Torvalds } 6711da177e4SLinus Torvalds 6721da177e4SLinus Torvalds __module_get(THIS_MODULE); 673eafe1311SKevin Cernekee register_reboot_notifier(&mtd->reboot_notifier); 6741da177e4SLinus Torvalds return mtd; 6751da177e4SLinus Torvalds 6761da177e4SLinus Torvalds setup_err: 6771da177e4SLinus Torvalds kfree(mtd->eraseregions); 6781da177e4SLinus Torvalds kfree(mtd); 6791da177e4SLinus Torvalds kfree(cfi->cmdset_priv); 6801da177e4SLinus Torvalds kfree(cfi->cfiq); 6811da177e4SLinus Torvalds return NULL; 6821da177e4SLinus Torvalds } 6831da177e4SLinus Torvalds 6841da177e4SLinus Torvalds /* 6851da177e4SLinus Torvalds * Return true if the chip is ready. 6861da177e4SLinus Torvalds * 6871da177e4SLinus Torvalds * Ready is one of: read mode, query mode, erase-suspend-read mode (in any 6881da177e4SLinus Torvalds * non-suspended sector) and is indicated by no toggle bits toggling. 6891da177e4SLinus Torvalds * 6901da177e4SLinus Torvalds * Note that anything more complicated than checking if no bits are toggling 6911da177e4SLinus Torvalds * (including checking DQ5 for an error status) is tricky to get working 69225985edcSLucas De Marchi * correctly and is therefore not done (particularly with interleaved chips 69325985edcSLucas De Marchi * as each chip must be checked independently of the others). 6941da177e4SLinus Torvalds */ 69502b15e34STodd Poynor static int __xipram chip_ready(struct map_info *map, unsigned long addr) 6961da177e4SLinus Torvalds { 6971da177e4SLinus Torvalds map_word d, t; 6981da177e4SLinus Torvalds 6991da177e4SLinus Torvalds d = map_read(map, addr); 7001da177e4SLinus Torvalds t = map_read(map, addr); 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds return map_word_equal(map, d, t); 7031da177e4SLinus Torvalds } 7041da177e4SLinus Torvalds 705fb4a90bfSEric W. Biedermann /* 706fb4a90bfSEric W. Biedermann * Return true if the chip is ready and has the correct value. 707fb4a90bfSEric W. Biedermann * 708fb4a90bfSEric W. Biedermann * Ready is one of: read mode, query mode, erase-suspend-read mode (in any 709fb4a90bfSEric W. Biedermann * non-suspended sector) and it is indicated by no bits toggling. 710fb4a90bfSEric W. Biedermann * 711fb4a90bfSEric W. Biedermann * Error are indicated by toggling bits or bits held with the wrong value, 712fb4a90bfSEric W. Biedermann * or with bits toggling. 713fb4a90bfSEric W. Biedermann * 714fb4a90bfSEric W. Biedermann * Note that anything more complicated than checking if no bits are toggling 715fb4a90bfSEric W. Biedermann * (including checking DQ5 for an error status) is tricky to get working 71625985edcSLucas De Marchi * correctly and is therefore not done (particularly with interleaved chips 71725985edcSLucas De Marchi * as each chip must be checked independently of the others). 718fb4a90bfSEric W. Biedermann * 719fb4a90bfSEric W. Biedermann */ 72002b15e34STodd Poynor static int __xipram chip_good(struct map_info *map, unsigned long addr, map_word expected) 721fb4a90bfSEric W. Biedermann { 722fb4a90bfSEric W. Biedermann map_word oldd, curd; 723fb4a90bfSEric W. Biedermann 724fb4a90bfSEric W. Biedermann oldd = map_read(map, addr); 725fb4a90bfSEric W. Biedermann curd = map_read(map, addr); 726fb4a90bfSEric W. Biedermann 727fb4a90bfSEric W. Biedermann return map_word_equal(map, oldd, curd) && 728fb4a90bfSEric W. Biedermann map_word_equal(map, curd, expected); 729fb4a90bfSEric W. Biedermann } 730fb4a90bfSEric W. Biedermann 7311da177e4SLinus Torvalds static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode) 7321da177e4SLinus Torvalds { 7331da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 7341da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 7351da177e4SLinus Torvalds unsigned long timeo; 7361da177e4SLinus Torvalds struct cfi_pri_amdstd *cfip = (struct cfi_pri_amdstd *)cfi->cmdset_priv; 7371da177e4SLinus Torvalds 7381da177e4SLinus Torvalds resettime: 7391da177e4SLinus Torvalds timeo = jiffies + HZ; 7401da177e4SLinus Torvalds retry: 7411da177e4SLinus Torvalds switch (chip->state) { 7421da177e4SLinus Torvalds 7431da177e4SLinus Torvalds case FL_STATUS: 7441da177e4SLinus Torvalds for (;;) { 7451da177e4SLinus Torvalds if (chip_ready(map, adr)) 7461da177e4SLinus Torvalds break; 7471da177e4SLinus Torvalds 7481da177e4SLinus Torvalds if (time_after(jiffies, timeo)) { 7491da177e4SLinus Torvalds printk(KERN_ERR "Waiting for chip to be ready timed out.\n"); 7501da177e4SLinus Torvalds return -EIO; 7511da177e4SLinus Torvalds } 752c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 7531da177e4SLinus Torvalds cfi_udelay(1); 754c4e77376SStefani Seibold mutex_lock(&chip->mutex); 7551da177e4SLinus Torvalds /* Someone else might have been playing with it. */ 7561da177e4SLinus Torvalds goto retry; 7571da177e4SLinus Torvalds } 7581da177e4SLinus Torvalds 7591da177e4SLinus Torvalds case FL_READY: 7601da177e4SLinus Torvalds case FL_CFI_QUERY: 7611da177e4SLinus Torvalds case FL_JEDEC_QUERY: 7621da177e4SLinus Torvalds return 0; 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds case FL_ERASING: 7652695eab9SJoakim Tjernlund if (!cfip || !(cfip->EraseSuspend & (0x1|0x2)) || 7662695eab9SJoakim Tjernlund !(mode == FL_READY || mode == FL_POINT || 7672695eab9SJoakim Tjernlund (mode == FL_WRITING && (cfip->EraseSuspend & 0x2)))) 7681da177e4SLinus Torvalds goto sleep; 7691da177e4SLinus Torvalds 7701da177e4SLinus Torvalds /* We could check to see if we're trying to access the sector 7711da177e4SLinus Torvalds * that is currently being erased. However, no user will try 7721da177e4SLinus Torvalds * anything like that so we just wait for the timeout. */ 7731da177e4SLinus Torvalds 7741da177e4SLinus Torvalds /* Erase suspend */ 7751da177e4SLinus Torvalds /* It's harmless to issue the Erase-Suspend and Erase-Resume 7761da177e4SLinus Torvalds * commands when the erase algorithm isn't in progress. */ 7771da177e4SLinus Torvalds map_write(map, CMD(0xB0), chip->in_progress_block_addr); 7781da177e4SLinus Torvalds chip->oldstate = FL_ERASING; 7791da177e4SLinus Torvalds chip->state = FL_ERASE_SUSPENDING; 7801da177e4SLinus Torvalds chip->erase_suspended = 1; 7811da177e4SLinus Torvalds for (;;) { 7821da177e4SLinus Torvalds if (chip_ready(map, adr)) 7831da177e4SLinus Torvalds break; 7841da177e4SLinus Torvalds 7851da177e4SLinus Torvalds if (time_after(jiffies, timeo)) { 7861da177e4SLinus Torvalds /* Should have suspended the erase by now. 7871da177e4SLinus Torvalds * Send an Erase-Resume command as either 7881da177e4SLinus Torvalds * there was an error (so leave the erase 7891da177e4SLinus Torvalds * routine to recover from it) or we trying to 7901da177e4SLinus Torvalds * use the erase-in-progress sector. */ 791100f2341STadashi Abe put_chip(map, chip, adr); 7921da177e4SLinus Torvalds printk(KERN_ERR "MTD %s(): chip not ready after erase suspend\n", __func__); 7931da177e4SLinus Torvalds return -EIO; 7941da177e4SLinus Torvalds } 7951da177e4SLinus Torvalds 796c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 7971da177e4SLinus Torvalds cfi_udelay(1); 798c4e77376SStefani Seibold mutex_lock(&chip->mutex); 7991da177e4SLinus Torvalds /* Nobody will touch it while it's in state FL_ERASE_SUSPENDING. 8001da177e4SLinus Torvalds So we can just loop here. */ 8011da177e4SLinus Torvalds } 8021da177e4SLinus Torvalds chip->state = FL_READY; 8031da177e4SLinus Torvalds return 0; 8041da177e4SLinus Torvalds 80502b15e34STodd Poynor case FL_XIP_WHILE_ERASING: 80602b15e34STodd Poynor if (mode != FL_READY && mode != FL_POINT && 80702b15e34STodd Poynor (!cfip || !(cfip->EraseSuspend&2))) 80802b15e34STodd Poynor goto sleep; 80902b15e34STodd Poynor chip->oldstate = chip->state; 81002b15e34STodd Poynor chip->state = FL_READY; 81102b15e34STodd Poynor return 0; 81202b15e34STodd Poynor 813eafe1311SKevin Cernekee case FL_SHUTDOWN: 814eafe1311SKevin Cernekee /* The machine is rebooting */ 815eafe1311SKevin Cernekee return -EIO; 816eafe1311SKevin Cernekee 8171da177e4SLinus Torvalds case FL_POINT: 8181da177e4SLinus Torvalds /* Only if there's no operation suspended... */ 8191da177e4SLinus Torvalds if (mode == FL_READY && chip->oldstate == FL_READY) 8201da177e4SLinus Torvalds return 0; 8211da177e4SLinus Torvalds 8221da177e4SLinus Torvalds default: 8231da177e4SLinus Torvalds sleep: 8241da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 8251da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 826c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 8271da177e4SLinus Torvalds schedule(); 8281da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 829c4e77376SStefani Seibold mutex_lock(&chip->mutex); 8301da177e4SLinus Torvalds goto resettime; 8311da177e4SLinus Torvalds } 8321da177e4SLinus Torvalds } 8331da177e4SLinus Torvalds 8341da177e4SLinus Torvalds 8351da177e4SLinus Torvalds static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr) 8361da177e4SLinus Torvalds { 8371da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 8381da177e4SLinus Torvalds 8391da177e4SLinus Torvalds switch(chip->oldstate) { 8401da177e4SLinus Torvalds case FL_ERASING: 84142096288SGerlando Falauto cfi_fixup_m29ew_erase_suspend(map, 84242096288SGerlando Falauto chip->in_progress_block_addr); 84308968041SGuillaume LECERF map_write(map, cfi->sector_erase_cmd, chip->in_progress_block_addr); 84442096288SGerlando Falauto cfi_fixup_m29ew_delay_after_resume(cfi); 8451da177e4SLinus Torvalds chip->oldstate = FL_READY; 8461da177e4SLinus Torvalds chip->state = FL_ERASING; 8471da177e4SLinus Torvalds break; 8481da177e4SLinus Torvalds 84902b15e34STodd Poynor case FL_XIP_WHILE_ERASING: 85002b15e34STodd Poynor chip->state = chip->oldstate; 85102b15e34STodd Poynor chip->oldstate = FL_READY; 85202b15e34STodd Poynor break; 85302b15e34STodd Poynor 8541da177e4SLinus Torvalds case FL_READY: 8551da177e4SLinus Torvalds case FL_STATUS: 8561da177e4SLinus Torvalds break; 8571da177e4SLinus Torvalds default: 8581da177e4SLinus Torvalds printk(KERN_ERR "MTD: put_chip() called with oldstate %d!!\n", chip->oldstate); 8591da177e4SLinus Torvalds } 8601da177e4SLinus Torvalds wake_up(&chip->wq); 8611da177e4SLinus Torvalds } 8621da177e4SLinus Torvalds 86302b15e34STodd Poynor #ifdef CONFIG_MTD_XIP 86402b15e34STodd Poynor 86502b15e34STodd Poynor /* 86602b15e34STodd Poynor * No interrupt what so ever can be serviced while the flash isn't in array 86702b15e34STodd Poynor * mode. This is ensured by the xip_disable() and xip_enable() functions 86802b15e34STodd Poynor * enclosing any code path where the flash is known not to be in array mode. 86902b15e34STodd Poynor * And within a XIP disabled code path, only functions marked with __xipram 87002b15e34STodd Poynor * may be called and nothing else (it's a good thing to inspect generated 87102b15e34STodd Poynor * assembly to make sure inline functions were actually inlined and that gcc 87202b15e34STodd Poynor * didn't emit calls to its own support functions). Also configuring MTD CFI 87302b15e34STodd Poynor * support to a single buswidth and a single interleave is also recommended. 87402b15e34STodd Poynor */ 875f8eb321bSThomas Gleixner 87602b15e34STodd Poynor static void xip_disable(struct map_info *map, struct flchip *chip, 87702b15e34STodd Poynor unsigned long adr) 87802b15e34STodd Poynor { 87902b15e34STodd Poynor /* TODO: chips with no XIP use should ignore and return */ 88002b15e34STodd Poynor (void) map_read(map, adr); /* ensure mmu mapping is up to date */ 88102b15e34STodd Poynor local_irq_disable(); 88202b15e34STodd Poynor } 88302b15e34STodd Poynor 88402b15e34STodd Poynor static void __xipram xip_enable(struct map_info *map, struct flchip *chip, 88502b15e34STodd Poynor unsigned long adr) 88602b15e34STodd Poynor { 88702b15e34STodd Poynor struct cfi_private *cfi = map->fldrv_priv; 88802b15e34STodd Poynor 88902b15e34STodd Poynor if (chip->state != FL_POINT && chip->state != FL_READY) { 89002b15e34STodd Poynor map_write(map, CMD(0xf0), adr); 89102b15e34STodd Poynor chip->state = FL_READY; 89202b15e34STodd Poynor } 89302b15e34STodd Poynor (void) map_read(map, adr); 89497f927a4SThomas Gleixner xip_iprefetch(); 89502b15e34STodd Poynor local_irq_enable(); 89602b15e34STodd Poynor } 89702b15e34STodd Poynor 89802b15e34STodd Poynor /* 89902b15e34STodd Poynor * When a delay is required for the flash operation to complete, the 90002b15e34STodd Poynor * xip_udelay() function is polling for both the given timeout and pending 90102b15e34STodd Poynor * (but still masked) hardware interrupts. Whenever there is an interrupt 90202b15e34STodd Poynor * pending then the flash erase operation is suspended, array mode restored 90302b15e34STodd Poynor * and interrupts unmasked. Task scheduling might also happen at that 90402b15e34STodd Poynor * point. The CPU eventually returns from the interrupt or the call to 90502b15e34STodd Poynor * schedule() and the suspended flash operation is resumed for the remaining 90602b15e34STodd Poynor * of the delay period. 90702b15e34STodd Poynor * 90802b15e34STodd Poynor * Warning: this function _will_ fool interrupt latency tracing tools. 90902b15e34STodd Poynor */ 91002b15e34STodd Poynor 91102b15e34STodd Poynor static void __xipram xip_udelay(struct map_info *map, struct flchip *chip, 91202b15e34STodd Poynor unsigned long adr, int usec) 91302b15e34STodd Poynor { 91402b15e34STodd Poynor struct cfi_private *cfi = map->fldrv_priv; 91502b15e34STodd Poynor struct cfi_pri_amdstd *extp = cfi->cmdset_priv; 91602b15e34STodd Poynor map_word status, OK = CMD(0x80); 91702b15e34STodd Poynor unsigned long suspended, start = xip_currtime(); 91802b15e34STodd Poynor flstate_t oldstate; 91902b15e34STodd Poynor 92002b15e34STodd Poynor do { 92102b15e34STodd Poynor cpu_relax(); 92202b15e34STodd Poynor if (xip_irqpending() && extp && 92302b15e34STodd Poynor ((chip->state == FL_ERASING && (extp->EraseSuspend & 2))) && 92402b15e34STodd Poynor (cfi_interleave_is_1(cfi) || chip->oldstate == FL_READY)) { 92502b15e34STodd Poynor /* 92602b15e34STodd Poynor * Let's suspend the erase operation when supported. 92702b15e34STodd Poynor * Note that we currently don't try to suspend 92802b15e34STodd Poynor * interleaved chips if there is already another 92902b15e34STodd Poynor * operation suspended (imagine what happens 93002b15e34STodd Poynor * when one chip was already done with the current 93102b15e34STodd Poynor * operation while another chip suspended it, then 93202b15e34STodd Poynor * we resume the whole thing at once). Yes, it 93302b15e34STodd Poynor * can happen! 93402b15e34STodd Poynor */ 93502b15e34STodd Poynor map_write(map, CMD(0xb0), adr); 93602b15e34STodd Poynor usec -= xip_elapsed_since(start); 93702b15e34STodd Poynor suspended = xip_currtime(); 93802b15e34STodd Poynor do { 93902b15e34STodd Poynor if (xip_elapsed_since(suspended) > 100000) { 94002b15e34STodd Poynor /* 94102b15e34STodd Poynor * The chip doesn't want to suspend 94202b15e34STodd Poynor * after waiting for 100 msecs. 94302b15e34STodd Poynor * This is a critical error but there 94402b15e34STodd Poynor * is not much we can do here. 94502b15e34STodd Poynor */ 94602b15e34STodd Poynor return; 94702b15e34STodd Poynor } 94802b15e34STodd Poynor status = map_read(map, adr); 94902b15e34STodd Poynor } while (!map_word_andequal(map, status, OK, OK)); 95002b15e34STodd Poynor 95102b15e34STodd Poynor /* Suspend succeeded */ 95202b15e34STodd Poynor oldstate = chip->state; 95302b15e34STodd Poynor if (!map_word_bitsset(map, status, CMD(0x40))) 95402b15e34STodd Poynor break; 95502b15e34STodd Poynor chip->state = FL_XIP_WHILE_ERASING; 95602b15e34STodd Poynor chip->erase_suspended = 1; 95702b15e34STodd Poynor map_write(map, CMD(0xf0), adr); 95802b15e34STodd Poynor (void) map_read(map, adr); 959ca5c23c3SPaulius Zaleckas xip_iprefetch(); 96002b15e34STodd Poynor local_irq_enable(); 961c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 962ca5c23c3SPaulius Zaleckas xip_iprefetch(); 96302b15e34STodd Poynor cond_resched(); 96402b15e34STodd Poynor 96502b15e34STodd Poynor /* 96602b15e34STodd Poynor * We're back. However someone else might have 96702b15e34STodd Poynor * decided to go write to the chip if we are in 96802b15e34STodd Poynor * a suspended erase state. If so let's wait 96902b15e34STodd Poynor * until it's done. 97002b15e34STodd Poynor */ 971c4e77376SStefani Seibold mutex_lock(&chip->mutex); 97202b15e34STodd Poynor while (chip->state != FL_XIP_WHILE_ERASING) { 97302b15e34STodd Poynor DECLARE_WAITQUEUE(wait, current); 97402b15e34STodd Poynor set_current_state(TASK_UNINTERRUPTIBLE); 97502b15e34STodd Poynor add_wait_queue(&chip->wq, &wait); 976c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 97702b15e34STodd Poynor schedule(); 97802b15e34STodd Poynor remove_wait_queue(&chip->wq, &wait); 979c4e77376SStefani Seibold mutex_lock(&chip->mutex); 98002b15e34STodd Poynor } 98102b15e34STodd Poynor /* Disallow XIP again */ 98202b15e34STodd Poynor local_irq_disable(); 98302b15e34STodd Poynor 98442096288SGerlando Falauto /* Correct Erase Suspend Hangups for M29EW */ 98542096288SGerlando Falauto cfi_fixup_m29ew_erase_suspend(map, adr); 98602b15e34STodd Poynor /* Resume the write or erase operation */ 98708968041SGuillaume LECERF map_write(map, cfi->sector_erase_cmd, adr); 98802b15e34STodd Poynor chip->state = oldstate; 98902b15e34STodd Poynor start = xip_currtime(); 99002b15e34STodd Poynor } else if (usec >= 1000000/HZ) { 99102b15e34STodd Poynor /* 99202b15e34STodd Poynor * Try to save on CPU power when waiting delay 99302b15e34STodd Poynor * is at least a system timer tick period. 99402b15e34STodd Poynor * No need to be extremely accurate here. 99502b15e34STodd Poynor */ 99602b15e34STodd Poynor xip_cpu_idle(); 99702b15e34STodd Poynor } 99802b15e34STodd Poynor status = map_read(map, adr); 99902b15e34STodd Poynor } while (!map_word_andequal(map, status, OK, OK) 100002b15e34STodd Poynor && xip_elapsed_since(start) < usec); 100102b15e34STodd Poynor } 100202b15e34STodd Poynor 100302b15e34STodd Poynor #define UDELAY(map, chip, adr, usec) xip_udelay(map, chip, adr, usec) 100402b15e34STodd Poynor 100502b15e34STodd Poynor /* 100602b15e34STodd Poynor * The INVALIDATE_CACHED_RANGE() macro is normally used in parallel while 100702b15e34STodd Poynor * the flash is actively programming or erasing since we have to poll for 100802b15e34STodd Poynor * the operation to complete anyway. We can't do that in a generic way with 100902b15e34STodd Poynor * a XIP setup so do it before the actual flash operation in this case 101002b15e34STodd Poynor * and stub it out from INVALIDATE_CACHE_UDELAY. 101102b15e34STodd Poynor */ 101202b15e34STodd Poynor #define XIP_INVAL_CACHED_RANGE(map, from, size) \ 101302b15e34STodd Poynor INVALIDATE_CACHED_RANGE(map, from, size) 101402b15e34STodd Poynor 101502b15e34STodd Poynor #define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \ 101602b15e34STodd Poynor UDELAY(map, chip, adr, usec) 101702b15e34STodd Poynor 101802b15e34STodd Poynor /* 101902b15e34STodd Poynor * Extra notes: 102002b15e34STodd Poynor * 102102b15e34STodd Poynor * Activating this XIP support changes the way the code works a bit. For 102202b15e34STodd Poynor * example the code to suspend the current process when concurrent access 102302b15e34STodd Poynor * happens is never executed because xip_udelay() will always return with the 102402b15e34STodd Poynor * same chip state as it was entered with. This is why there is no care for 102502b15e34STodd Poynor * the presence of add_wait_queue() or schedule() calls from within a couple 102602b15e34STodd Poynor * xip_disable()'d areas of code, like in do_erase_oneblock for example. 102702b15e34STodd Poynor * The queueing and scheduling are always happening within xip_udelay(). 102802b15e34STodd Poynor * 102902b15e34STodd Poynor * Similarly, get_chip() and put_chip() just happen to always be executed 103002b15e34STodd Poynor * with chip->state set to FL_READY (or FL_XIP_WHILE_*) where flash state 103102b15e34STodd Poynor * is in array mode, therefore never executing many cases therein and not 103202b15e34STodd Poynor * causing any problem with XIP. 103302b15e34STodd Poynor */ 103402b15e34STodd Poynor 103502b15e34STodd Poynor #else 103602b15e34STodd Poynor 103702b15e34STodd Poynor #define xip_disable(map, chip, adr) 103802b15e34STodd Poynor #define xip_enable(map, chip, adr) 103902b15e34STodd Poynor #define XIP_INVAL_CACHED_RANGE(x...) 104002b15e34STodd Poynor 104102b15e34STodd Poynor #define UDELAY(map, chip, adr, usec) \ 104202b15e34STodd Poynor do { \ 1043c4e77376SStefani Seibold mutex_unlock(&chip->mutex); \ 104402b15e34STodd Poynor cfi_udelay(usec); \ 1045c4e77376SStefani Seibold mutex_lock(&chip->mutex); \ 104602b15e34STodd Poynor } while (0) 104702b15e34STodd Poynor 104802b15e34STodd Poynor #define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \ 104902b15e34STodd Poynor do { \ 1050c4e77376SStefani Seibold mutex_unlock(&chip->mutex); \ 105102b15e34STodd Poynor INVALIDATE_CACHED_RANGE(map, adr, len); \ 105202b15e34STodd Poynor cfi_udelay(usec); \ 1053c4e77376SStefani Seibold mutex_lock(&chip->mutex); \ 105402b15e34STodd Poynor } while (0) 105502b15e34STodd Poynor 105602b15e34STodd Poynor #endif 10571da177e4SLinus Torvalds 10581da177e4SLinus Torvalds static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) 10591da177e4SLinus Torvalds { 10601da177e4SLinus Torvalds unsigned long cmd_addr; 10611da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 10621da177e4SLinus Torvalds int ret; 10631da177e4SLinus Torvalds 10641da177e4SLinus Torvalds adr += chip->start; 10651da177e4SLinus Torvalds 10661da177e4SLinus Torvalds /* Ensure cmd read/writes are aligned. */ 10671da177e4SLinus Torvalds cmd_addr = adr & ~(map_bankwidth(map)-1); 10681da177e4SLinus Torvalds 1069c4e77376SStefani Seibold mutex_lock(&chip->mutex); 10701da177e4SLinus Torvalds ret = get_chip(map, chip, cmd_addr, FL_READY); 10711da177e4SLinus Torvalds if (ret) { 1072c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 10731da177e4SLinus Torvalds return ret; 10741da177e4SLinus Torvalds } 10751da177e4SLinus Torvalds 10761da177e4SLinus Torvalds if (chip->state != FL_POINT && chip->state != FL_READY) { 10771da177e4SLinus Torvalds map_write(map, CMD(0xf0), cmd_addr); 10781da177e4SLinus Torvalds chip->state = FL_READY; 10791da177e4SLinus Torvalds } 10801da177e4SLinus Torvalds 10811da177e4SLinus Torvalds map_copy_from(map, buf, adr, len); 10821da177e4SLinus Torvalds 10831da177e4SLinus Torvalds put_chip(map, chip, cmd_addr); 10841da177e4SLinus Torvalds 1085c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 10861da177e4SLinus Torvalds return 0; 10871da177e4SLinus Torvalds } 10881da177e4SLinus Torvalds 10891da177e4SLinus Torvalds 10901da177e4SLinus Torvalds static int cfi_amdstd_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) 10911da177e4SLinus Torvalds { 10921da177e4SLinus Torvalds struct map_info *map = mtd->priv; 10931da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 10941da177e4SLinus Torvalds unsigned long ofs; 10951da177e4SLinus Torvalds int chipnum; 10961da177e4SLinus Torvalds int ret = 0; 10971da177e4SLinus Torvalds 10981da177e4SLinus Torvalds /* ofs: offset within the first chip that the first read should start */ 10991da177e4SLinus Torvalds chipnum = (from >> cfi->chipshift); 11001da177e4SLinus Torvalds ofs = from - (chipnum << cfi->chipshift); 11011da177e4SLinus Torvalds 11021da177e4SLinus Torvalds while (len) { 11031da177e4SLinus Torvalds unsigned long thislen; 11041da177e4SLinus Torvalds 11051da177e4SLinus Torvalds if (chipnum >= cfi->numchips) 11061da177e4SLinus Torvalds break; 11071da177e4SLinus Torvalds 11081da177e4SLinus Torvalds if ((len + ofs -1) >> cfi->chipshift) 11091da177e4SLinus Torvalds thislen = (1<<cfi->chipshift) - ofs; 11101da177e4SLinus Torvalds else 11111da177e4SLinus Torvalds thislen = len; 11121da177e4SLinus Torvalds 11131da177e4SLinus Torvalds ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); 11141da177e4SLinus Torvalds if (ret) 11151da177e4SLinus Torvalds break; 11161da177e4SLinus Torvalds 11171da177e4SLinus Torvalds *retlen += thislen; 11181da177e4SLinus Torvalds len -= thislen; 11191da177e4SLinus Torvalds buf += thislen; 11201da177e4SLinus Torvalds 11211da177e4SLinus Torvalds ofs = 0; 11221da177e4SLinus Torvalds chipnum++; 11231da177e4SLinus Torvalds } 11241da177e4SLinus Torvalds return ret; 11251da177e4SLinus Torvalds } 11261da177e4SLinus Torvalds 11271da177e4SLinus Torvalds 11281da177e4SLinus Torvalds static inline int do_read_secsi_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) 11291da177e4SLinus Torvalds { 11301da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 11311da177e4SLinus Torvalds unsigned long timeo = jiffies + HZ; 11321da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 11331da177e4SLinus Torvalds 11341da177e4SLinus Torvalds retry: 1135c4e77376SStefani Seibold mutex_lock(&chip->mutex); 11361da177e4SLinus Torvalds 11371da177e4SLinus Torvalds if (chip->state != FL_READY){ 11381da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 11391da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 11401da177e4SLinus Torvalds 1141c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 11421da177e4SLinus Torvalds 11431da177e4SLinus Torvalds schedule(); 11441da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 11451da177e4SLinus Torvalds timeo = jiffies + HZ; 11461da177e4SLinus Torvalds 11471da177e4SLinus Torvalds goto retry; 11481da177e4SLinus Torvalds } 11491da177e4SLinus Torvalds 11501da177e4SLinus Torvalds adr += chip->start; 11511da177e4SLinus Torvalds 11521da177e4SLinus Torvalds chip->state = FL_READY; 11531da177e4SLinus Torvalds 11541da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 11551da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 11561da177e4SLinus Torvalds cfi_send_gen_cmd(0x88, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 11571da177e4SLinus Torvalds 11581da177e4SLinus Torvalds map_copy_from(map, buf, adr, len); 11591da177e4SLinus Torvalds 11601da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 11611da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 11621da177e4SLinus Torvalds cfi_send_gen_cmd(0x90, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 11631da177e4SLinus Torvalds cfi_send_gen_cmd(0x00, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 11641da177e4SLinus Torvalds 11651da177e4SLinus Torvalds wake_up(&chip->wq); 1166c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 11671da177e4SLinus Torvalds 11681da177e4SLinus Torvalds return 0; 11691da177e4SLinus Torvalds } 11701da177e4SLinus Torvalds 11711da177e4SLinus Torvalds static int cfi_amdstd_secsi_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) 11721da177e4SLinus Torvalds { 11731da177e4SLinus Torvalds struct map_info *map = mtd->priv; 11741da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 11751da177e4SLinus Torvalds unsigned long ofs; 11761da177e4SLinus Torvalds int chipnum; 11771da177e4SLinus Torvalds int ret = 0; 11781da177e4SLinus Torvalds 11791da177e4SLinus Torvalds /* ofs: offset within the first chip that the first read should start */ 11801da177e4SLinus Torvalds /* 8 secsi bytes per chip */ 11811da177e4SLinus Torvalds chipnum=from>>3; 11821da177e4SLinus Torvalds ofs=from & 7; 11831da177e4SLinus Torvalds 11841da177e4SLinus Torvalds while (len) { 11851da177e4SLinus Torvalds unsigned long thislen; 11861da177e4SLinus Torvalds 11871da177e4SLinus Torvalds if (chipnum >= cfi->numchips) 11881da177e4SLinus Torvalds break; 11891da177e4SLinus Torvalds 11901da177e4SLinus Torvalds if ((len + ofs -1) >> 3) 11911da177e4SLinus Torvalds thislen = (1<<3) - ofs; 11921da177e4SLinus Torvalds else 11931da177e4SLinus Torvalds thislen = len; 11941da177e4SLinus Torvalds 11951da177e4SLinus Torvalds ret = do_read_secsi_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); 11961da177e4SLinus Torvalds if (ret) 11971da177e4SLinus Torvalds break; 11981da177e4SLinus Torvalds 11991da177e4SLinus Torvalds *retlen += thislen; 12001da177e4SLinus Torvalds len -= thislen; 12011da177e4SLinus Torvalds buf += thislen; 12021da177e4SLinus Torvalds 12031da177e4SLinus Torvalds ofs = 0; 12041da177e4SLinus Torvalds chipnum++; 12051da177e4SLinus Torvalds } 12061da177e4SLinus Torvalds return ret; 12071da177e4SLinus Torvalds } 12081da177e4SLinus Torvalds 12091da177e4SLinus Torvalds 121002b15e34STodd Poynor static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, unsigned long adr, map_word datum) 12111da177e4SLinus Torvalds { 12121da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 12131da177e4SLinus Torvalds unsigned long timeo = jiffies + HZ; 12141da177e4SLinus Torvalds /* 12151da177e4SLinus Torvalds * We use a 1ms + 1 jiffies generic timeout for writes (most devices 12161da177e4SLinus Torvalds * have a max write time of a few hundreds usec). However, we should 12171da177e4SLinus Torvalds * use the maximum timeout value given by the chip at probe time 12181da177e4SLinus Torvalds * instead. Unfortunately, struct flchip does have a field for 12191da177e4SLinus Torvalds * maximum timeout, only for typical which can be far too short 12201da177e4SLinus Torvalds * depending of the conditions. The ' + 1' is to avoid having a 12211da177e4SLinus Torvalds * timeout of 0 jiffies if HZ is smaller than 1000. 12221da177e4SLinus Torvalds */ 12231da177e4SLinus Torvalds unsigned long uWriteTimeout = ( HZ / 1000 ) + 1; 12241da177e4SLinus Torvalds int ret = 0; 12251da177e4SLinus Torvalds map_word oldd; 12261da177e4SLinus Torvalds int retry_cnt = 0; 12271da177e4SLinus Torvalds 12281da177e4SLinus Torvalds adr += chip->start; 12291da177e4SLinus Torvalds 1230c4e77376SStefani Seibold mutex_lock(&chip->mutex); 12311da177e4SLinus Torvalds ret = get_chip(map, chip, adr, FL_WRITING); 12321da177e4SLinus Torvalds if (ret) { 1233c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 12341da177e4SLinus Torvalds return ret; 12351da177e4SLinus Torvalds } 12361da177e4SLinus Torvalds 1237289c0522SBrian Norris pr_debug("MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n", 12381da177e4SLinus Torvalds __func__, adr, datum.x[0] ); 12391da177e4SLinus Torvalds 12401da177e4SLinus Torvalds /* 12411da177e4SLinus Torvalds * Check for a NOP for the case when the datum to write is already 12421da177e4SLinus Torvalds * present - it saves time and works around buggy chips that corrupt 12431da177e4SLinus Torvalds * data at other locations when 0xff is written to a location that 12441da177e4SLinus Torvalds * already contains 0xff. 12451da177e4SLinus Torvalds */ 12461da177e4SLinus Torvalds oldd = map_read(map, adr); 12471da177e4SLinus Torvalds if (map_word_equal(map, oldd, datum)) { 1248289c0522SBrian Norris pr_debug("MTD %s(): NOP\n", 12491da177e4SLinus Torvalds __func__); 12501da177e4SLinus Torvalds goto op_done; 12511da177e4SLinus Torvalds } 12521da177e4SLinus Torvalds 125302b15e34STodd Poynor XIP_INVAL_CACHED_RANGE(map, adr, map_bankwidth(map)); 12541da177e4SLinus Torvalds ENABLE_VPP(map); 125502b15e34STodd Poynor xip_disable(map, chip, adr); 12561da177e4SLinus Torvalds retry: 12571da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 12581da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 12591da177e4SLinus Torvalds cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 12601da177e4SLinus Torvalds map_write(map, datum, adr); 12611da177e4SLinus Torvalds chip->state = FL_WRITING; 12621da177e4SLinus Torvalds 126302b15e34STodd Poynor INVALIDATE_CACHE_UDELAY(map, chip, 126402b15e34STodd Poynor adr, map_bankwidth(map), 126502b15e34STodd Poynor chip->word_write_time); 12661da177e4SLinus Torvalds 12671da177e4SLinus Torvalds /* See comment above for timeout value. */ 12681da177e4SLinus Torvalds timeo = jiffies + uWriteTimeout; 12691da177e4SLinus Torvalds for (;;) { 12701da177e4SLinus Torvalds if (chip->state != FL_WRITING) { 12711da177e4SLinus Torvalds /* Someone's suspended the write. Sleep */ 12721da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 12731da177e4SLinus Torvalds 12741da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 12751da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 1276c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 12771da177e4SLinus Torvalds schedule(); 12781da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 12791da177e4SLinus Torvalds timeo = jiffies + (HZ / 2); /* FIXME */ 1280c4e77376SStefani Seibold mutex_lock(&chip->mutex); 12811da177e4SLinus Torvalds continue; 12821da177e4SLinus Torvalds } 12831da177e4SLinus Torvalds 1284b95f9609SKonstantin Baidarov if (time_after(jiffies, timeo) && !chip_ready(map, adr)){ 128502b15e34STodd Poynor xip_enable(map, chip, adr); 1286fb4a90bfSEric W. Biedermann printk(KERN_WARNING "MTD %s(): software timeout\n", __func__); 128702b15e34STodd Poynor xip_disable(map, chip, adr); 1288fb4a90bfSEric W. Biedermann break; 1289fb4a90bfSEric W. Biedermann } 1290fb4a90bfSEric W. Biedermann 1291b95f9609SKonstantin Baidarov if (chip_ready(map, adr)) 1292b95f9609SKonstantin Baidarov break; 1293b95f9609SKonstantin Baidarov 12941da177e4SLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 129502b15e34STodd Poynor UDELAY(map, chip, adr, 1); 12961da177e4SLinus Torvalds } 1297fb4a90bfSEric W. Biedermann /* Did we succeed? */ 1298fb4a90bfSEric W. Biedermann if (!chip_good(map, adr, datum)) { 12991da177e4SLinus Torvalds /* reset on all failures. */ 13001da177e4SLinus Torvalds map_write( map, CMD(0xF0), chip->start ); 13011da177e4SLinus Torvalds /* FIXME - should have reset delay before continuing */ 1302fb4a90bfSEric W. Biedermann 13031da177e4SLinus Torvalds if (++retry_cnt <= MAX_WORD_RETRIES) 13041da177e4SLinus Torvalds goto retry; 13051da177e4SLinus Torvalds 13061da177e4SLinus Torvalds ret = -EIO; 1307fb4a90bfSEric W. Biedermann } 130802b15e34STodd Poynor xip_enable(map, chip, adr); 13091da177e4SLinus Torvalds op_done: 13101da177e4SLinus Torvalds chip->state = FL_READY; 1311e7d9377eSPaul Parsons DISABLE_VPP(map); 13121da177e4SLinus Torvalds put_chip(map, chip, adr); 1313c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 13141da177e4SLinus Torvalds 13151da177e4SLinus Torvalds return ret; 13161da177e4SLinus Torvalds } 13171da177e4SLinus Torvalds 13181da177e4SLinus Torvalds 13191da177e4SLinus Torvalds static int cfi_amdstd_write_words(struct mtd_info *mtd, loff_t to, size_t len, 13201da177e4SLinus Torvalds size_t *retlen, const u_char *buf) 13211da177e4SLinus Torvalds { 13221da177e4SLinus Torvalds struct map_info *map = mtd->priv; 13231da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 13241da177e4SLinus Torvalds int ret = 0; 13251da177e4SLinus Torvalds int chipnum; 13261da177e4SLinus Torvalds unsigned long ofs, chipstart; 13271da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 13281da177e4SLinus Torvalds 13291da177e4SLinus Torvalds chipnum = to >> cfi->chipshift; 13301da177e4SLinus Torvalds ofs = to - (chipnum << cfi->chipshift); 13311da177e4SLinus Torvalds chipstart = cfi->chips[chipnum].start; 13321da177e4SLinus Torvalds 13331da177e4SLinus Torvalds /* If it's not bus-aligned, do the first byte write */ 13341da177e4SLinus Torvalds if (ofs & (map_bankwidth(map)-1)) { 13351da177e4SLinus Torvalds unsigned long bus_ofs = ofs & ~(map_bankwidth(map)-1); 13361da177e4SLinus Torvalds int i = ofs - bus_ofs; 13371da177e4SLinus Torvalds int n = 0; 13381da177e4SLinus Torvalds map_word tmp_buf; 13391da177e4SLinus Torvalds 13401da177e4SLinus Torvalds retry: 1341c4e77376SStefani Seibold mutex_lock(&cfi->chips[chipnum].mutex); 13421da177e4SLinus Torvalds 13431da177e4SLinus Torvalds if (cfi->chips[chipnum].state != FL_READY) { 13441da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 13451da177e4SLinus Torvalds add_wait_queue(&cfi->chips[chipnum].wq, &wait); 13461da177e4SLinus Torvalds 1347c4e77376SStefani Seibold mutex_unlock(&cfi->chips[chipnum].mutex); 13481da177e4SLinus Torvalds 13491da177e4SLinus Torvalds schedule(); 13501da177e4SLinus Torvalds remove_wait_queue(&cfi->chips[chipnum].wq, &wait); 13511da177e4SLinus Torvalds goto retry; 13521da177e4SLinus Torvalds } 13531da177e4SLinus Torvalds 13541da177e4SLinus Torvalds /* Load 'tmp_buf' with old contents of flash */ 13551da177e4SLinus Torvalds tmp_buf = map_read(map, bus_ofs+chipstart); 13561da177e4SLinus Torvalds 1357c4e77376SStefani Seibold mutex_unlock(&cfi->chips[chipnum].mutex); 13581da177e4SLinus Torvalds 13591da177e4SLinus Torvalds /* Number of bytes to copy from buffer */ 13601da177e4SLinus Torvalds n = min_t(int, len, map_bankwidth(map)-i); 13611da177e4SLinus Torvalds 13621da177e4SLinus Torvalds tmp_buf = map_word_load_partial(map, tmp_buf, buf, i, n); 13631da177e4SLinus Torvalds 13641da177e4SLinus Torvalds ret = do_write_oneword(map, &cfi->chips[chipnum], 13651da177e4SLinus Torvalds bus_ofs, tmp_buf); 13661da177e4SLinus Torvalds if (ret) 13671da177e4SLinus Torvalds return ret; 13681da177e4SLinus Torvalds 13691da177e4SLinus Torvalds ofs += n; 13701da177e4SLinus Torvalds buf += n; 13711da177e4SLinus Torvalds (*retlen) += n; 13721da177e4SLinus Torvalds len -= n; 13731da177e4SLinus Torvalds 13741da177e4SLinus Torvalds if (ofs >> cfi->chipshift) { 13751da177e4SLinus Torvalds chipnum ++; 13761da177e4SLinus Torvalds ofs = 0; 13771da177e4SLinus Torvalds if (chipnum == cfi->numchips) 13781da177e4SLinus Torvalds return 0; 13791da177e4SLinus Torvalds } 13801da177e4SLinus Torvalds } 13811da177e4SLinus Torvalds 13821da177e4SLinus Torvalds /* We are now aligned, write as much as possible */ 13831da177e4SLinus Torvalds while(len >= map_bankwidth(map)) { 13841da177e4SLinus Torvalds map_word datum; 13851da177e4SLinus Torvalds 13861da177e4SLinus Torvalds datum = map_word_load(map, buf); 13871da177e4SLinus Torvalds 13881da177e4SLinus Torvalds ret = do_write_oneword(map, &cfi->chips[chipnum], 13891da177e4SLinus Torvalds ofs, datum); 13901da177e4SLinus Torvalds if (ret) 13911da177e4SLinus Torvalds return ret; 13921da177e4SLinus Torvalds 13931da177e4SLinus Torvalds ofs += map_bankwidth(map); 13941da177e4SLinus Torvalds buf += map_bankwidth(map); 13951da177e4SLinus Torvalds (*retlen) += map_bankwidth(map); 13961da177e4SLinus Torvalds len -= map_bankwidth(map); 13971da177e4SLinus Torvalds 13981da177e4SLinus Torvalds if (ofs >> cfi->chipshift) { 13991da177e4SLinus Torvalds chipnum ++; 14001da177e4SLinus Torvalds ofs = 0; 14011da177e4SLinus Torvalds if (chipnum == cfi->numchips) 14021da177e4SLinus Torvalds return 0; 14031da177e4SLinus Torvalds chipstart = cfi->chips[chipnum].start; 14041da177e4SLinus Torvalds } 14051da177e4SLinus Torvalds } 14061da177e4SLinus Torvalds 14071da177e4SLinus Torvalds /* Write the trailing bytes if any */ 14081da177e4SLinus Torvalds if (len & (map_bankwidth(map)-1)) { 14091da177e4SLinus Torvalds map_word tmp_buf; 14101da177e4SLinus Torvalds 14111da177e4SLinus Torvalds retry1: 1412c4e77376SStefani Seibold mutex_lock(&cfi->chips[chipnum].mutex); 14131da177e4SLinus Torvalds 14141da177e4SLinus Torvalds if (cfi->chips[chipnum].state != FL_READY) { 14151da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 14161da177e4SLinus Torvalds add_wait_queue(&cfi->chips[chipnum].wq, &wait); 14171da177e4SLinus Torvalds 1418c4e77376SStefani Seibold mutex_unlock(&cfi->chips[chipnum].mutex); 14191da177e4SLinus Torvalds 14201da177e4SLinus Torvalds schedule(); 14211da177e4SLinus Torvalds remove_wait_queue(&cfi->chips[chipnum].wq, &wait); 14221da177e4SLinus Torvalds goto retry1; 14231da177e4SLinus Torvalds } 14241da177e4SLinus Torvalds 14251da177e4SLinus Torvalds tmp_buf = map_read(map, ofs + chipstart); 14261da177e4SLinus Torvalds 1427c4e77376SStefani Seibold mutex_unlock(&cfi->chips[chipnum].mutex); 14281da177e4SLinus Torvalds 14291da177e4SLinus Torvalds tmp_buf = map_word_load_partial(map, tmp_buf, buf, 0, len); 14301da177e4SLinus Torvalds 14311da177e4SLinus Torvalds ret = do_write_oneword(map, &cfi->chips[chipnum], 14321da177e4SLinus Torvalds ofs, tmp_buf); 14331da177e4SLinus Torvalds if (ret) 14341da177e4SLinus Torvalds return ret; 14351da177e4SLinus Torvalds 14361da177e4SLinus Torvalds (*retlen) += len; 14371da177e4SLinus Torvalds } 14381da177e4SLinus Torvalds 14391da177e4SLinus Torvalds return 0; 14401da177e4SLinus Torvalds } 14411da177e4SLinus Torvalds 14421da177e4SLinus Torvalds 14431da177e4SLinus Torvalds /* 14441da177e4SLinus Torvalds * FIXME: interleaved mode not tested, and probably not supported! 14451da177e4SLinus Torvalds */ 144602b15e34STodd Poynor static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, 144702b15e34STodd Poynor unsigned long adr, const u_char *buf, 144802b15e34STodd Poynor int len) 14491da177e4SLinus Torvalds { 14501da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 14511da177e4SLinus Torvalds unsigned long timeo = jiffies + HZ; 14521da177e4SLinus Torvalds /* see comments in do_write_oneword() regarding uWriteTimeo. */ 14531da177e4SLinus Torvalds unsigned long uWriteTimeout = ( HZ / 1000 ) + 1; 14541da177e4SLinus Torvalds int ret = -EIO; 14551da177e4SLinus Torvalds unsigned long cmd_adr; 14561da177e4SLinus Torvalds int z, words; 14571da177e4SLinus Torvalds map_word datum; 14581da177e4SLinus Torvalds 14591da177e4SLinus Torvalds adr += chip->start; 14601da177e4SLinus Torvalds cmd_adr = adr; 14611da177e4SLinus Torvalds 1462c4e77376SStefani Seibold mutex_lock(&chip->mutex); 14631da177e4SLinus Torvalds ret = get_chip(map, chip, adr, FL_WRITING); 14641da177e4SLinus Torvalds if (ret) { 1465c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 14661da177e4SLinus Torvalds return ret; 14671da177e4SLinus Torvalds } 14681da177e4SLinus Torvalds 14691da177e4SLinus Torvalds datum = map_word_load(map, buf); 14701da177e4SLinus Torvalds 1471289c0522SBrian Norris pr_debug("MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n", 14721da177e4SLinus Torvalds __func__, adr, datum.x[0] ); 14731da177e4SLinus Torvalds 147402b15e34STodd Poynor XIP_INVAL_CACHED_RANGE(map, adr, len); 14751da177e4SLinus Torvalds ENABLE_VPP(map); 147602b15e34STodd Poynor xip_disable(map, chip, cmd_adr); 147702b15e34STodd Poynor 14781da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 14791da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 14801da177e4SLinus Torvalds 14811da177e4SLinus Torvalds /* Write Buffer Load */ 14821da177e4SLinus Torvalds map_write(map, CMD(0x25), cmd_adr); 14831da177e4SLinus Torvalds 14841da177e4SLinus Torvalds chip->state = FL_WRITING_TO_BUFFER; 14851da177e4SLinus Torvalds 14861da177e4SLinus Torvalds /* Write length of data to come */ 14871da177e4SLinus Torvalds words = len / map_bankwidth(map); 14881da177e4SLinus Torvalds map_write(map, CMD(words - 1), cmd_adr); 14891da177e4SLinus Torvalds /* Write data */ 14901da177e4SLinus Torvalds z = 0; 14911da177e4SLinus Torvalds while(z < words * map_bankwidth(map)) { 14921da177e4SLinus Torvalds datum = map_word_load(map, buf); 14931da177e4SLinus Torvalds map_write(map, datum, adr + z); 14941da177e4SLinus Torvalds 14951da177e4SLinus Torvalds z += map_bankwidth(map); 14961da177e4SLinus Torvalds buf += map_bankwidth(map); 14971da177e4SLinus Torvalds } 14981da177e4SLinus Torvalds z -= map_bankwidth(map); 14991da177e4SLinus Torvalds 15001da177e4SLinus Torvalds adr += z; 15011da177e4SLinus Torvalds 15021da177e4SLinus Torvalds /* Write Buffer Program Confirm: GO GO GO */ 15031da177e4SLinus Torvalds map_write(map, CMD(0x29), cmd_adr); 15041da177e4SLinus Torvalds chip->state = FL_WRITING; 15051da177e4SLinus Torvalds 150602b15e34STodd Poynor INVALIDATE_CACHE_UDELAY(map, chip, 150702b15e34STodd Poynor adr, map_bankwidth(map), 150802b15e34STodd Poynor chip->word_write_time); 15091da177e4SLinus Torvalds 15101da177e4SLinus Torvalds timeo = jiffies + uWriteTimeout; 15111da177e4SLinus Torvalds 15121da177e4SLinus Torvalds for (;;) { 15131da177e4SLinus Torvalds if (chip->state != FL_WRITING) { 15141da177e4SLinus Torvalds /* Someone's suspended the write. Sleep */ 15151da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 15161da177e4SLinus Torvalds 15171da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 15181da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 1519c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 15201da177e4SLinus Torvalds schedule(); 15211da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 15221da177e4SLinus Torvalds timeo = jiffies + (HZ / 2); /* FIXME */ 1523c4e77376SStefani Seibold mutex_lock(&chip->mutex); 15241da177e4SLinus Torvalds continue; 15251da177e4SLinus Torvalds } 15261da177e4SLinus Torvalds 1527b95f9609SKonstantin Baidarov if (time_after(jiffies, timeo) && !chip_ready(map, adr)) 1528b95f9609SKonstantin Baidarov break; 1529b95f9609SKonstantin Baidarov 153002b15e34STodd Poynor if (chip_ready(map, adr)) { 153102b15e34STodd Poynor xip_enable(map, chip, adr); 15321da177e4SLinus Torvalds goto op_done; 153302b15e34STodd Poynor } 15341da177e4SLinus Torvalds 15351da177e4SLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 153602b15e34STodd Poynor UDELAY(map, chip, adr, 1); 15371da177e4SLinus Torvalds } 15381da177e4SLinus Torvalds 1539070c3222SHarald Nordgard-Hansen /* 1540070c3222SHarald Nordgard-Hansen * Recovery from write-buffer programming failures requires 1541070c3222SHarald Nordgard-Hansen * the write-to-buffer-reset sequence. Since the last part 1542070c3222SHarald Nordgard-Hansen * of the sequence also works as a normal reset, we can run 1543070c3222SHarald Nordgard-Hansen * the same commands regardless of why we are here. 1544070c3222SHarald Nordgard-Hansen * See e.g. 1545070c3222SHarald Nordgard-Hansen * http://www.spansion.com/Support/Application%20Notes/MirrorBit_Write_Buffer_Prog_Page_Buffer_Read_AN.pdf 1546070c3222SHarald Nordgard-Hansen */ 1547070c3222SHarald Nordgard-Hansen cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, 1548070c3222SHarald Nordgard-Hansen cfi->device_type, NULL); 1549070c3222SHarald Nordgard-Hansen cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, 1550070c3222SHarald Nordgard-Hansen cfi->device_type, NULL); 1551070c3222SHarald Nordgard-Hansen cfi_send_gen_cmd(0xF0, cfi->addr_unlock1, chip->start, map, cfi, 1552070c3222SHarald Nordgard-Hansen cfi->device_type, NULL); 155302b15e34STodd Poynor xip_enable(map, chip, adr); 15541da177e4SLinus Torvalds /* FIXME - should have reset delay before continuing */ 15551da177e4SLinus Torvalds 155602b15e34STodd Poynor printk(KERN_WARNING "MTD %s(): software timeout\n", 155702b15e34STodd Poynor __func__ ); 155802b15e34STodd Poynor 15591da177e4SLinus Torvalds ret = -EIO; 15601da177e4SLinus Torvalds op_done: 15611da177e4SLinus Torvalds chip->state = FL_READY; 1562e7d9377eSPaul Parsons DISABLE_VPP(map); 15631da177e4SLinus Torvalds put_chip(map, chip, adr); 1564c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 15651da177e4SLinus Torvalds 15661da177e4SLinus Torvalds return ret; 15671da177e4SLinus Torvalds } 15681da177e4SLinus Torvalds 15691da177e4SLinus Torvalds 15701da177e4SLinus Torvalds static int cfi_amdstd_write_buffers(struct mtd_info *mtd, loff_t to, size_t len, 15711da177e4SLinus Torvalds size_t *retlen, const u_char *buf) 15721da177e4SLinus Torvalds { 15731da177e4SLinus Torvalds struct map_info *map = mtd->priv; 15741da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 15751da177e4SLinus Torvalds int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; 15761da177e4SLinus Torvalds int ret = 0; 15771da177e4SLinus Torvalds int chipnum; 15781da177e4SLinus Torvalds unsigned long ofs; 15791da177e4SLinus Torvalds 15801da177e4SLinus Torvalds chipnum = to >> cfi->chipshift; 15811da177e4SLinus Torvalds ofs = to - (chipnum << cfi->chipshift); 15821da177e4SLinus Torvalds 15831da177e4SLinus Torvalds /* If it's not bus-aligned, do the first word write */ 15841da177e4SLinus Torvalds if (ofs & (map_bankwidth(map)-1)) { 15851da177e4SLinus Torvalds size_t local_len = (-ofs)&(map_bankwidth(map)-1); 15861da177e4SLinus Torvalds if (local_len > len) 15871da177e4SLinus Torvalds local_len = len; 15881da177e4SLinus Torvalds ret = cfi_amdstd_write_words(mtd, ofs + (chipnum<<cfi->chipshift), 15891da177e4SLinus Torvalds local_len, retlen, buf); 15901da177e4SLinus Torvalds if (ret) 15911da177e4SLinus Torvalds return ret; 15921da177e4SLinus Torvalds ofs += local_len; 15931da177e4SLinus Torvalds buf += local_len; 15941da177e4SLinus Torvalds len -= local_len; 15951da177e4SLinus Torvalds 15961da177e4SLinus Torvalds if (ofs >> cfi->chipshift) { 15971da177e4SLinus Torvalds chipnum ++; 15981da177e4SLinus Torvalds ofs = 0; 15991da177e4SLinus Torvalds if (chipnum == cfi->numchips) 16001da177e4SLinus Torvalds return 0; 16011da177e4SLinus Torvalds } 16021da177e4SLinus Torvalds } 16031da177e4SLinus Torvalds 16041da177e4SLinus Torvalds /* Write buffer is worth it only if more than one word to write... */ 16051da177e4SLinus Torvalds while (len >= map_bankwidth(map) * 2) { 16061da177e4SLinus Torvalds /* We must not cross write block boundaries */ 16071da177e4SLinus Torvalds int size = wbufsize - (ofs & (wbufsize-1)); 16081da177e4SLinus Torvalds 16091da177e4SLinus Torvalds if (size > len) 16101da177e4SLinus Torvalds size = len; 16111da177e4SLinus Torvalds if (size % map_bankwidth(map)) 16121da177e4SLinus Torvalds size -= size % map_bankwidth(map); 16131da177e4SLinus Torvalds 16141da177e4SLinus Torvalds ret = do_write_buffer(map, &cfi->chips[chipnum], 16151da177e4SLinus Torvalds ofs, buf, size); 16161da177e4SLinus Torvalds if (ret) 16171da177e4SLinus Torvalds return ret; 16181da177e4SLinus Torvalds 16191da177e4SLinus Torvalds ofs += size; 16201da177e4SLinus Torvalds buf += size; 16211da177e4SLinus Torvalds (*retlen) += size; 16221da177e4SLinus Torvalds len -= size; 16231da177e4SLinus Torvalds 16241da177e4SLinus Torvalds if (ofs >> cfi->chipshift) { 16251da177e4SLinus Torvalds chipnum ++; 16261da177e4SLinus Torvalds ofs = 0; 16271da177e4SLinus Torvalds if (chipnum == cfi->numchips) 16281da177e4SLinus Torvalds return 0; 16291da177e4SLinus Torvalds } 16301da177e4SLinus Torvalds } 16311da177e4SLinus Torvalds 16321da177e4SLinus Torvalds if (len) { 16331da177e4SLinus Torvalds size_t retlen_dregs = 0; 16341da177e4SLinus Torvalds 16351da177e4SLinus Torvalds ret = cfi_amdstd_write_words(mtd, ofs + (chipnum<<cfi->chipshift), 16361da177e4SLinus Torvalds len, &retlen_dregs, buf); 16371da177e4SLinus Torvalds 16381da177e4SLinus Torvalds *retlen += retlen_dregs; 16391da177e4SLinus Torvalds return ret; 16401da177e4SLinus Torvalds } 16411da177e4SLinus Torvalds 16421da177e4SLinus Torvalds return 0; 16431da177e4SLinus Torvalds } 16441da177e4SLinus Torvalds 164530ec5a2cSIra W. Snyder /* 164630ec5a2cSIra W. Snyder * Wait for the flash chip to become ready to write data 164730ec5a2cSIra W. Snyder * 164830ec5a2cSIra W. Snyder * This is only called during the panic_write() path. When panic_write() 164930ec5a2cSIra W. Snyder * is called, the kernel is in the process of a panic, and will soon be 165030ec5a2cSIra W. Snyder * dead. Therefore we don't take any locks, and attempt to get access 165130ec5a2cSIra W. Snyder * to the chip as soon as possible. 165230ec5a2cSIra W. Snyder */ 165330ec5a2cSIra W. Snyder static int cfi_amdstd_panic_wait(struct map_info *map, struct flchip *chip, 165430ec5a2cSIra W. Snyder unsigned long adr) 165530ec5a2cSIra W. Snyder { 165630ec5a2cSIra W. Snyder struct cfi_private *cfi = map->fldrv_priv; 165730ec5a2cSIra W. Snyder int retries = 10; 165830ec5a2cSIra W. Snyder int i; 165930ec5a2cSIra W. Snyder 166030ec5a2cSIra W. Snyder /* 166130ec5a2cSIra W. Snyder * If the driver thinks the chip is idle, and no toggle bits 166230ec5a2cSIra W. Snyder * are changing, then the chip is actually idle for sure. 166330ec5a2cSIra W. Snyder */ 166430ec5a2cSIra W. Snyder if (chip->state == FL_READY && chip_ready(map, adr)) 166530ec5a2cSIra W. Snyder return 0; 166630ec5a2cSIra W. Snyder 166730ec5a2cSIra W. Snyder /* 166830ec5a2cSIra W. Snyder * Try several times to reset the chip and then wait for it 166930ec5a2cSIra W. Snyder * to become idle. The upper limit of a few milliseconds of 167030ec5a2cSIra W. Snyder * delay isn't a big problem: the kernel is dying anyway. It 167130ec5a2cSIra W. Snyder * is more important to save the messages. 167230ec5a2cSIra W. Snyder */ 167330ec5a2cSIra W. Snyder while (retries > 0) { 167430ec5a2cSIra W. Snyder const unsigned long timeo = (HZ / 1000) + 1; 167530ec5a2cSIra W. Snyder 167630ec5a2cSIra W. Snyder /* send the reset command */ 167730ec5a2cSIra W. Snyder map_write(map, CMD(0xF0), chip->start); 167830ec5a2cSIra W. Snyder 167930ec5a2cSIra W. Snyder /* wait for the chip to become ready */ 168030ec5a2cSIra W. Snyder for (i = 0; i < jiffies_to_usecs(timeo); i++) { 168130ec5a2cSIra W. Snyder if (chip_ready(map, adr)) 168230ec5a2cSIra W. Snyder return 0; 168330ec5a2cSIra W. Snyder 168430ec5a2cSIra W. Snyder udelay(1); 168530ec5a2cSIra W. Snyder } 168630ec5a2cSIra W. Snyder } 168730ec5a2cSIra W. Snyder 168830ec5a2cSIra W. Snyder /* the chip never became ready */ 168930ec5a2cSIra W. Snyder return -EBUSY; 169030ec5a2cSIra W. Snyder } 169130ec5a2cSIra W. Snyder 169230ec5a2cSIra W. Snyder /* 169330ec5a2cSIra W. Snyder * Write out one word of data to a single flash chip during a kernel panic 169430ec5a2cSIra W. Snyder * 169530ec5a2cSIra W. Snyder * This is only called during the panic_write() path. When panic_write() 169630ec5a2cSIra W. Snyder * is called, the kernel is in the process of a panic, and will soon be 169730ec5a2cSIra W. Snyder * dead. Therefore we don't take any locks, and attempt to get access 169830ec5a2cSIra W. Snyder * to the chip as soon as possible. 169930ec5a2cSIra W. Snyder * 170030ec5a2cSIra W. Snyder * The implementation of this routine is intentionally similar to 170130ec5a2cSIra W. Snyder * do_write_oneword(), in order to ease code maintenance. 170230ec5a2cSIra W. Snyder */ 170330ec5a2cSIra W. Snyder static int do_panic_write_oneword(struct map_info *map, struct flchip *chip, 170430ec5a2cSIra W. Snyder unsigned long adr, map_word datum) 170530ec5a2cSIra W. Snyder { 170630ec5a2cSIra W. Snyder const unsigned long uWriteTimeout = (HZ / 1000) + 1; 170730ec5a2cSIra W. Snyder struct cfi_private *cfi = map->fldrv_priv; 170830ec5a2cSIra W. Snyder int retry_cnt = 0; 170930ec5a2cSIra W. Snyder map_word oldd; 171030ec5a2cSIra W. Snyder int ret = 0; 171130ec5a2cSIra W. Snyder int i; 171230ec5a2cSIra W. Snyder 171330ec5a2cSIra W. Snyder adr += chip->start; 171430ec5a2cSIra W. Snyder 171530ec5a2cSIra W. Snyder ret = cfi_amdstd_panic_wait(map, chip, adr); 171630ec5a2cSIra W. Snyder if (ret) 171730ec5a2cSIra W. Snyder return ret; 171830ec5a2cSIra W. Snyder 171930ec5a2cSIra W. Snyder pr_debug("MTD %s(): PANIC WRITE 0x%.8lx(0x%.8lx)\n", 172030ec5a2cSIra W. Snyder __func__, adr, datum.x[0]); 172130ec5a2cSIra W. Snyder 172230ec5a2cSIra W. Snyder /* 172330ec5a2cSIra W. Snyder * Check for a NOP for the case when the datum to write is already 172430ec5a2cSIra W. Snyder * present - it saves time and works around buggy chips that corrupt 172530ec5a2cSIra W. Snyder * data at other locations when 0xff is written to a location that 172630ec5a2cSIra W. Snyder * already contains 0xff. 172730ec5a2cSIra W. Snyder */ 172830ec5a2cSIra W. Snyder oldd = map_read(map, adr); 172930ec5a2cSIra W. Snyder if (map_word_equal(map, oldd, datum)) { 173030ec5a2cSIra W. Snyder pr_debug("MTD %s(): NOP\n", __func__); 173130ec5a2cSIra W. Snyder goto op_done; 173230ec5a2cSIra W. Snyder } 173330ec5a2cSIra W. Snyder 173430ec5a2cSIra W. Snyder ENABLE_VPP(map); 173530ec5a2cSIra W. Snyder 173630ec5a2cSIra W. Snyder retry: 173730ec5a2cSIra W. Snyder cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 173830ec5a2cSIra W. Snyder cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 173930ec5a2cSIra W. Snyder cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 174030ec5a2cSIra W. Snyder map_write(map, datum, adr); 174130ec5a2cSIra W. Snyder 174230ec5a2cSIra W. Snyder for (i = 0; i < jiffies_to_usecs(uWriteTimeout); i++) { 174330ec5a2cSIra W. Snyder if (chip_ready(map, adr)) 174430ec5a2cSIra W. Snyder break; 174530ec5a2cSIra W. Snyder 174630ec5a2cSIra W. Snyder udelay(1); 174730ec5a2cSIra W. Snyder } 174830ec5a2cSIra W. Snyder 174930ec5a2cSIra W. Snyder if (!chip_good(map, adr, datum)) { 175030ec5a2cSIra W. Snyder /* reset on all failures. */ 175130ec5a2cSIra W. Snyder map_write(map, CMD(0xF0), chip->start); 175230ec5a2cSIra W. Snyder /* FIXME - should have reset delay before continuing */ 175330ec5a2cSIra W. Snyder 175430ec5a2cSIra W. Snyder if (++retry_cnt <= MAX_WORD_RETRIES) 175530ec5a2cSIra W. Snyder goto retry; 175630ec5a2cSIra W. Snyder 175730ec5a2cSIra W. Snyder ret = -EIO; 175830ec5a2cSIra W. Snyder } 175930ec5a2cSIra W. Snyder 176030ec5a2cSIra W. Snyder op_done: 176130ec5a2cSIra W. Snyder DISABLE_VPP(map); 176230ec5a2cSIra W. Snyder return ret; 176330ec5a2cSIra W. Snyder } 176430ec5a2cSIra W. Snyder 176530ec5a2cSIra W. Snyder /* 176630ec5a2cSIra W. Snyder * Write out some data during a kernel panic 176730ec5a2cSIra W. Snyder * 176830ec5a2cSIra W. Snyder * This is used by the mtdoops driver to save the dying messages from a 176930ec5a2cSIra W. Snyder * kernel which has panic'd. 177030ec5a2cSIra W. Snyder * 177130ec5a2cSIra W. Snyder * This routine ignores all of the locking used throughout the rest of the 177230ec5a2cSIra W. Snyder * driver, in order to ensure that the data gets written out no matter what 177330ec5a2cSIra W. Snyder * state this driver (and the flash chip itself) was in when the kernel crashed. 177430ec5a2cSIra W. Snyder * 177530ec5a2cSIra W. Snyder * The implementation of this routine is intentionally similar to 177630ec5a2cSIra W. Snyder * cfi_amdstd_write_words(), in order to ease code maintenance. 177730ec5a2cSIra W. Snyder */ 177830ec5a2cSIra W. Snyder static int cfi_amdstd_panic_write(struct mtd_info *mtd, loff_t to, size_t len, 177930ec5a2cSIra W. Snyder size_t *retlen, const u_char *buf) 178030ec5a2cSIra W. Snyder { 178130ec5a2cSIra W. Snyder struct map_info *map = mtd->priv; 178230ec5a2cSIra W. Snyder struct cfi_private *cfi = map->fldrv_priv; 178330ec5a2cSIra W. Snyder unsigned long ofs, chipstart; 178430ec5a2cSIra W. Snyder int ret = 0; 178530ec5a2cSIra W. Snyder int chipnum; 178630ec5a2cSIra W. Snyder 178730ec5a2cSIra W. Snyder chipnum = to >> cfi->chipshift; 178830ec5a2cSIra W. Snyder ofs = to - (chipnum << cfi->chipshift); 178930ec5a2cSIra W. Snyder chipstart = cfi->chips[chipnum].start; 179030ec5a2cSIra W. Snyder 179130ec5a2cSIra W. Snyder /* If it's not bus aligned, do the first byte write */ 179230ec5a2cSIra W. Snyder if (ofs & (map_bankwidth(map) - 1)) { 179330ec5a2cSIra W. Snyder unsigned long bus_ofs = ofs & ~(map_bankwidth(map) - 1); 179430ec5a2cSIra W. Snyder int i = ofs - bus_ofs; 179530ec5a2cSIra W. Snyder int n = 0; 179630ec5a2cSIra W. Snyder map_word tmp_buf; 179730ec5a2cSIra W. Snyder 179830ec5a2cSIra W. Snyder ret = cfi_amdstd_panic_wait(map, &cfi->chips[chipnum], bus_ofs); 179930ec5a2cSIra W. Snyder if (ret) 180030ec5a2cSIra W. Snyder return ret; 180130ec5a2cSIra W. Snyder 180230ec5a2cSIra W. Snyder /* Load 'tmp_buf' with old contents of flash */ 180330ec5a2cSIra W. Snyder tmp_buf = map_read(map, bus_ofs + chipstart); 180430ec5a2cSIra W. Snyder 180530ec5a2cSIra W. Snyder /* Number of bytes to copy from buffer */ 180630ec5a2cSIra W. Snyder n = min_t(int, len, map_bankwidth(map) - i); 180730ec5a2cSIra W. Snyder 180830ec5a2cSIra W. Snyder tmp_buf = map_word_load_partial(map, tmp_buf, buf, i, n); 180930ec5a2cSIra W. Snyder 181030ec5a2cSIra W. Snyder ret = do_panic_write_oneword(map, &cfi->chips[chipnum], 181130ec5a2cSIra W. Snyder bus_ofs, tmp_buf); 181230ec5a2cSIra W. Snyder if (ret) 181330ec5a2cSIra W. Snyder return ret; 181430ec5a2cSIra W. Snyder 181530ec5a2cSIra W. Snyder ofs += n; 181630ec5a2cSIra W. Snyder buf += n; 181730ec5a2cSIra W. Snyder (*retlen) += n; 181830ec5a2cSIra W. Snyder len -= n; 181930ec5a2cSIra W. Snyder 182030ec5a2cSIra W. Snyder if (ofs >> cfi->chipshift) { 182130ec5a2cSIra W. Snyder chipnum++; 182230ec5a2cSIra W. Snyder ofs = 0; 182330ec5a2cSIra W. Snyder if (chipnum == cfi->numchips) 182430ec5a2cSIra W. Snyder return 0; 182530ec5a2cSIra W. Snyder } 182630ec5a2cSIra W. Snyder } 182730ec5a2cSIra W. Snyder 182830ec5a2cSIra W. Snyder /* We are now aligned, write as much as possible */ 182930ec5a2cSIra W. Snyder while (len >= map_bankwidth(map)) { 183030ec5a2cSIra W. Snyder map_word datum; 183130ec5a2cSIra W. Snyder 183230ec5a2cSIra W. Snyder datum = map_word_load(map, buf); 183330ec5a2cSIra W. Snyder 183430ec5a2cSIra W. Snyder ret = do_panic_write_oneword(map, &cfi->chips[chipnum], 183530ec5a2cSIra W. Snyder ofs, datum); 183630ec5a2cSIra W. Snyder if (ret) 183730ec5a2cSIra W. Snyder return ret; 183830ec5a2cSIra W. Snyder 183930ec5a2cSIra W. Snyder ofs += map_bankwidth(map); 184030ec5a2cSIra W. Snyder buf += map_bankwidth(map); 184130ec5a2cSIra W. Snyder (*retlen) += map_bankwidth(map); 184230ec5a2cSIra W. Snyder len -= map_bankwidth(map); 184330ec5a2cSIra W. Snyder 184430ec5a2cSIra W. Snyder if (ofs >> cfi->chipshift) { 184530ec5a2cSIra W. Snyder chipnum++; 184630ec5a2cSIra W. Snyder ofs = 0; 184730ec5a2cSIra W. Snyder if (chipnum == cfi->numchips) 184830ec5a2cSIra W. Snyder return 0; 184930ec5a2cSIra W. Snyder 185030ec5a2cSIra W. Snyder chipstart = cfi->chips[chipnum].start; 185130ec5a2cSIra W. Snyder } 185230ec5a2cSIra W. Snyder } 185330ec5a2cSIra W. Snyder 185430ec5a2cSIra W. Snyder /* Write the trailing bytes if any */ 185530ec5a2cSIra W. Snyder if (len & (map_bankwidth(map) - 1)) { 185630ec5a2cSIra W. Snyder map_word tmp_buf; 185730ec5a2cSIra W. Snyder 185830ec5a2cSIra W. Snyder ret = cfi_amdstd_panic_wait(map, &cfi->chips[chipnum], ofs); 185930ec5a2cSIra W. Snyder if (ret) 186030ec5a2cSIra W. Snyder return ret; 186130ec5a2cSIra W. Snyder 186230ec5a2cSIra W. Snyder tmp_buf = map_read(map, ofs + chipstart); 186330ec5a2cSIra W. Snyder 186430ec5a2cSIra W. Snyder tmp_buf = map_word_load_partial(map, tmp_buf, buf, 0, len); 186530ec5a2cSIra W. Snyder 186630ec5a2cSIra W. Snyder ret = do_panic_write_oneword(map, &cfi->chips[chipnum], 186730ec5a2cSIra W. Snyder ofs, tmp_buf); 186830ec5a2cSIra W. Snyder if (ret) 186930ec5a2cSIra W. Snyder return ret; 187030ec5a2cSIra W. Snyder 187130ec5a2cSIra W. Snyder (*retlen) += len; 187230ec5a2cSIra W. Snyder } 187330ec5a2cSIra W. Snyder 187430ec5a2cSIra W. Snyder return 0; 187530ec5a2cSIra W. Snyder } 187630ec5a2cSIra W. Snyder 18771da177e4SLinus Torvalds 18781da177e4SLinus Torvalds /* 18791da177e4SLinus Torvalds * Handle devices with one erase region, that only implement 18801da177e4SLinus Torvalds * the chip erase command. 18811da177e4SLinus Torvalds */ 188202b15e34STodd Poynor static int __xipram do_erase_chip(struct map_info *map, struct flchip *chip) 18831da177e4SLinus Torvalds { 18841da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 18851da177e4SLinus Torvalds unsigned long timeo = jiffies + HZ; 18861da177e4SLinus Torvalds unsigned long int adr; 18871da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 18881da177e4SLinus Torvalds int ret = 0; 18891da177e4SLinus Torvalds 18901da177e4SLinus Torvalds adr = cfi->addr_unlock1; 18911da177e4SLinus Torvalds 1892c4e77376SStefani Seibold mutex_lock(&chip->mutex); 18931da177e4SLinus Torvalds ret = get_chip(map, chip, adr, FL_WRITING); 18941da177e4SLinus Torvalds if (ret) { 1895c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 18961da177e4SLinus Torvalds return ret; 18971da177e4SLinus Torvalds } 18981da177e4SLinus Torvalds 1899289c0522SBrian Norris pr_debug("MTD %s(): ERASE 0x%.8lx\n", 19001da177e4SLinus Torvalds __func__, chip->start ); 19011da177e4SLinus Torvalds 190202b15e34STodd Poynor XIP_INVAL_CACHED_RANGE(map, adr, map->size); 19031da177e4SLinus Torvalds ENABLE_VPP(map); 190402b15e34STodd Poynor xip_disable(map, chip, adr); 190502b15e34STodd Poynor 19061da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 19071da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 19081da177e4SLinus Torvalds cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 19091da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 19101da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 19111da177e4SLinus Torvalds cfi_send_gen_cmd(0x10, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 19121da177e4SLinus Torvalds 19131da177e4SLinus Torvalds chip->state = FL_ERASING; 19141da177e4SLinus Torvalds chip->erase_suspended = 0; 19151da177e4SLinus Torvalds chip->in_progress_block_addr = adr; 19161da177e4SLinus Torvalds 191702b15e34STodd Poynor INVALIDATE_CACHE_UDELAY(map, chip, 191802b15e34STodd Poynor adr, map->size, 191902b15e34STodd Poynor chip->erase_time*500); 19201da177e4SLinus Torvalds 19211da177e4SLinus Torvalds timeo = jiffies + (HZ*20); 19221da177e4SLinus Torvalds 19231da177e4SLinus Torvalds for (;;) { 19241da177e4SLinus Torvalds if (chip->state != FL_ERASING) { 19251da177e4SLinus Torvalds /* Someone's suspended the erase. Sleep */ 19261da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 19271da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 1928c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 19291da177e4SLinus Torvalds schedule(); 19301da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 1931c4e77376SStefani Seibold mutex_lock(&chip->mutex); 19321da177e4SLinus Torvalds continue; 19331da177e4SLinus Torvalds } 19341da177e4SLinus Torvalds if (chip->erase_suspended) { 19351da177e4SLinus Torvalds /* This erase was suspended and resumed. 19361da177e4SLinus Torvalds Adjust the timeout */ 19371da177e4SLinus Torvalds timeo = jiffies + (HZ*20); /* FIXME */ 19381da177e4SLinus Torvalds chip->erase_suspended = 0; 19391da177e4SLinus Torvalds } 19401da177e4SLinus Torvalds 19411da177e4SLinus Torvalds if (chip_ready(map, adr)) 19421da177e4SLinus Torvalds break; 19431da177e4SLinus Torvalds 1944fb4a90bfSEric W. Biedermann if (time_after(jiffies, timeo)) { 1945fb4a90bfSEric W. Biedermann printk(KERN_WARNING "MTD %s(): software timeout\n", 1946fb4a90bfSEric W. Biedermann __func__ ); 1947fb4a90bfSEric W. Biedermann break; 1948fb4a90bfSEric W. Biedermann } 1949fb4a90bfSEric W. Biedermann 19501da177e4SLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 195102b15e34STodd Poynor UDELAY(map, chip, adr, 1000000/HZ); 19521da177e4SLinus Torvalds } 1953fb4a90bfSEric W. Biedermann /* Did we succeed? */ 1954fb4a90bfSEric W. Biedermann if (!chip_good(map, adr, map_word_ff(map))) { 19551da177e4SLinus Torvalds /* reset on all failures. */ 19561da177e4SLinus Torvalds map_write( map, CMD(0xF0), chip->start ); 19571da177e4SLinus Torvalds /* FIXME - should have reset delay before continuing */ 19581da177e4SLinus Torvalds 19591da177e4SLinus Torvalds ret = -EIO; 1960fb4a90bfSEric W. Biedermann } 1961fb4a90bfSEric W. Biedermann 19621da177e4SLinus Torvalds chip->state = FL_READY; 196302b15e34STodd Poynor xip_enable(map, chip, adr); 1964e7d9377eSPaul Parsons DISABLE_VPP(map); 19651da177e4SLinus Torvalds put_chip(map, chip, adr); 1966c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 19671da177e4SLinus Torvalds 19681da177e4SLinus Torvalds return ret; 19691da177e4SLinus Torvalds } 19701da177e4SLinus Torvalds 19711da177e4SLinus Torvalds 197202b15e34STodd Poynor static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr, int len, void *thunk) 19731da177e4SLinus Torvalds { 19741da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 19751da177e4SLinus Torvalds unsigned long timeo = jiffies + HZ; 19761da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 19771da177e4SLinus Torvalds int ret = 0; 19781da177e4SLinus Torvalds 19791da177e4SLinus Torvalds adr += chip->start; 19801da177e4SLinus Torvalds 1981c4e77376SStefani Seibold mutex_lock(&chip->mutex); 19821da177e4SLinus Torvalds ret = get_chip(map, chip, adr, FL_ERASING); 19831da177e4SLinus Torvalds if (ret) { 1984c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 19851da177e4SLinus Torvalds return ret; 19861da177e4SLinus Torvalds } 19871da177e4SLinus Torvalds 1988289c0522SBrian Norris pr_debug("MTD %s(): ERASE 0x%.8lx\n", 19891da177e4SLinus Torvalds __func__, adr ); 19901da177e4SLinus Torvalds 199102b15e34STodd Poynor XIP_INVAL_CACHED_RANGE(map, adr, len); 19921da177e4SLinus Torvalds ENABLE_VPP(map); 199302b15e34STodd Poynor xip_disable(map, chip, adr); 199402b15e34STodd Poynor 19951da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 19961da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 19971da177e4SLinus Torvalds cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 19981da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 19991da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 200008968041SGuillaume LECERF map_write(map, cfi->sector_erase_cmd, adr); 20011da177e4SLinus Torvalds 20021da177e4SLinus Torvalds chip->state = FL_ERASING; 20031da177e4SLinus Torvalds chip->erase_suspended = 0; 20041da177e4SLinus Torvalds chip->in_progress_block_addr = adr; 20051da177e4SLinus Torvalds 200602b15e34STodd Poynor INVALIDATE_CACHE_UDELAY(map, chip, 200702b15e34STodd Poynor adr, len, 200802b15e34STodd Poynor chip->erase_time*500); 20091da177e4SLinus Torvalds 20101da177e4SLinus Torvalds timeo = jiffies + (HZ*20); 20111da177e4SLinus Torvalds 20121da177e4SLinus Torvalds for (;;) { 20131da177e4SLinus Torvalds if (chip->state != FL_ERASING) { 20141da177e4SLinus Torvalds /* Someone's suspended the erase. Sleep */ 20151da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 20161da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 2017c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 20181da177e4SLinus Torvalds schedule(); 20191da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 2020c4e77376SStefani Seibold mutex_lock(&chip->mutex); 20211da177e4SLinus Torvalds continue; 20221da177e4SLinus Torvalds } 20231da177e4SLinus Torvalds if (chip->erase_suspended) { 20241da177e4SLinus Torvalds /* This erase was suspended and resumed. 20251da177e4SLinus Torvalds Adjust the timeout */ 20261da177e4SLinus Torvalds timeo = jiffies + (HZ*20); /* FIXME */ 20271da177e4SLinus Torvalds chip->erase_suspended = 0; 20281da177e4SLinus Torvalds } 20291da177e4SLinus Torvalds 203002b15e34STodd Poynor if (chip_ready(map, adr)) { 203102b15e34STodd Poynor xip_enable(map, chip, adr); 20321da177e4SLinus Torvalds break; 203302b15e34STodd Poynor } 20341da177e4SLinus Torvalds 2035fb4a90bfSEric W. Biedermann if (time_after(jiffies, timeo)) { 203602b15e34STodd Poynor xip_enable(map, chip, adr); 2037fb4a90bfSEric W. Biedermann printk(KERN_WARNING "MTD %s(): software timeout\n", 2038fb4a90bfSEric W. Biedermann __func__ ); 2039fb4a90bfSEric W. Biedermann break; 2040fb4a90bfSEric W. Biedermann } 2041fb4a90bfSEric W. Biedermann 20421da177e4SLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 204302b15e34STodd Poynor UDELAY(map, chip, adr, 1000000/HZ); 20441da177e4SLinus Torvalds } 2045fb4a90bfSEric W. Biedermann /* Did we succeed? */ 204622fd9a87SThomas Gleixner if (!chip_good(map, adr, map_word_ff(map))) { 20471da177e4SLinus Torvalds /* reset on all failures. */ 20481da177e4SLinus Torvalds map_write( map, CMD(0xF0), chip->start ); 20491da177e4SLinus Torvalds /* FIXME - should have reset delay before continuing */ 20501da177e4SLinus Torvalds 20511da177e4SLinus Torvalds ret = -EIO; 2052fb4a90bfSEric W. Biedermann } 2053fb4a90bfSEric W. Biedermann 20541da177e4SLinus Torvalds chip->state = FL_READY; 2055e7d9377eSPaul Parsons DISABLE_VPP(map); 20561da177e4SLinus Torvalds put_chip(map, chip, adr); 2057c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 20581da177e4SLinus Torvalds return ret; 20591da177e4SLinus Torvalds } 20601da177e4SLinus Torvalds 20611da177e4SLinus Torvalds 2062ce0f33adSBen Dooks static int cfi_amdstd_erase_varsize(struct mtd_info *mtd, struct erase_info *instr) 20631da177e4SLinus Torvalds { 20641da177e4SLinus Torvalds unsigned long ofs, len; 20651da177e4SLinus Torvalds int ret; 20661da177e4SLinus Torvalds 20671da177e4SLinus Torvalds ofs = instr->addr; 20681da177e4SLinus Torvalds len = instr->len; 20691da177e4SLinus Torvalds 20701da177e4SLinus Torvalds ret = cfi_varsize_frob(mtd, do_erase_oneblock, ofs, len, NULL); 20711da177e4SLinus Torvalds if (ret) 20721da177e4SLinus Torvalds return ret; 20731da177e4SLinus Torvalds 20741da177e4SLinus Torvalds instr->state = MTD_ERASE_DONE; 20751da177e4SLinus Torvalds mtd_erase_callback(instr); 20761da177e4SLinus Torvalds 20771da177e4SLinus Torvalds return 0; 20781da177e4SLinus Torvalds } 20791da177e4SLinus Torvalds 20801da177e4SLinus Torvalds 20811da177e4SLinus Torvalds static int cfi_amdstd_erase_chip(struct mtd_info *mtd, struct erase_info *instr) 20821da177e4SLinus Torvalds { 20831da177e4SLinus Torvalds struct map_info *map = mtd->priv; 20841da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 20851da177e4SLinus Torvalds int ret = 0; 20861da177e4SLinus Torvalds 20871da177e4SLinus Torvalds if (instr->addr != 0) 20881da177e4SLinus Torvalds return -EINVAL; 20891da177e4SLinus Torvalds 20901da177e4SLinus Torvalds if (instr->len != mtd->size) 20911da177e4SLinus Torvalds return -EINVAL; 20921da177e4SLinus Torvalds 20931da177e4SLinus Torvalds ret = do_erase_chip(map, &cfi->chips[0]); 20941da177e4SLinus Torvalds if (ret) 20951da177e4SLinus Torvalds return ret; 20961da177e4SLinus Torvalds 20971da177e4SLinus Torvalds instr->state = MTD_ERASE_DONE; 20981da177e4SLinus Torvalds mtd_erase_callback(instr); 20991da177e4SLinus Torvalds 21001da177e4SLinus Torvalds return 0; 21011da177e4SLinus Torvalds } 21021da177e4SLinus Torvalds 21030165508cSHaavard Skinnemoen static int do_atmel_lock(struct map_info *map, struct flchip *chip, 21040165508cSHaavard Skinnemoen unsigned long adr, int len, void *thunk) 21050165508cSHaavard Skinnemoen { 21060165508cSHaavard Skinnemoen struct cfi_private *cfi = map->fldrv_priv; 21070165508cSHaavard Skinnemoen int ret; 21080165508cSHaavard Skinnemoen 2109c4e77376SStefani Seibold mutex_lock(&chip->mutex); 21100165508cSHaavard Skinnemoen ret = get_chip(map, chip, adr + chip->start, FL_LOCKING); 21110165508cSHaavard Skinnemoen if (ret) 21120165508cSHaavard Skinnemoen goto out_unlock; 21130165508cSHaavard Skinnemoen chip->state = FL_LOCKING; 21140165508cSHaavard Skinnemoen 21150a32a102SBrian Norris pr_debug("MTD %s(): LOCK 0x%08lx len %d\n", __func__, adr, len); 21160165508cSHaavard Skinnemoen 21170165508cSHaavard Skinnemoen cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, 21180165508cSHaavard Skinnemoen cfi->device_type, NULL); 21190165508cSHaavard Skinnemoen cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, 21200165508cSHaavard Skinnemoen cfi->device_type, NULL); 21210165508cSHaavard Skinnemoen cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, 21220165508cSHaavard Skinnemoen cfi->device_type, NULL); 21230165508cSHaavard Skinnemoen cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, 21240165508cSHaavard Skinnemoen cfi->device_type, NULL); 21250165508cSHaavard Skinnemoen cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, 21260165508cSHaavard Skinnemoen cfi->device_type, NULL); 21270165508cSHaavard Skinnemoen map_write(map, CMD(0x40), chip->start + adr); 21280165508cSHaavard Skinnemoen 21290165508cSHaavard Skinnemoen chip->state = FL_READY; 21300165508cSHaavard Skinnemoen put_chip(map, chip, adr + chip->start); 21310165508cSHaavard Skinnemoen ret = 0; 21320165508cSHaavard Skinnemoen 21330165508cSHaavard Skinnemoen out_unlock: 2134c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 21350165508cSHaavard Skinnemoen return ret; 21360165508cSHaavard Skinnemoen } 21370165508cSHaavard Skinnemoen 21380165508cSHaavard Skinnemoen static int do_atmel_unlock(struct map_info *map, struct flchip *chip, 21390165508cSHaavard Skinnemoen unsigned long adr, int len, void *thunk) 21400165508cSHaavard Skinnemoen { 21410165508cSHaavard Skinnemoen struct cfi_private *cfi = map->fldrv_priv; 21420165508cSHaavard Skinnemoen int ret; 21430165508cSHaavard Skinnemoen 2144c4e77376SStefani Seibold mutex_lock(&chip->mutex); 21450165508cSHaavard Skinnemoen ret = get_chip(map, chip, adr + chip->start, FL_UNLOCKING); 21460165508cSHaavard Skinnemoen if (ret) 21470165508cSHaavard Skinnemoen goto out_unlock; 21480165508cSHaavard Skinnemoen chip->state = FL_UNLOCKING; 21490165508cSHaavard Skinnemoen 21500a32a102SBrian Norris pr_debug("MTD %s(): LOCK 0x%08lx len %d\n", __func__, adr, len); 21510165508cSHaavard Skinnemoen 21520165508cSHaavard Skinnemoen cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, 21530165508cSHaavard Skinnemoen cfi->device_type, NULL); 21540165508cSHaavard Skinnemoen map_write(map, CMD(0x70), adr); 21550165508cSHaavard Skinnemoen 21560165508cSHaavard Skinnemoen chip->state = FL_READY; 21570165508cSHaavard Skinnemoen put_chip(map, chip, adr + chip->start); 21580165508cSHaavard Skinnemoen ret = 0; 21590165508cSHaavard Skinnemoen 21600165508cSHaavard Skinnemoen out_unlock: 2161c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 21620165508cSHaavard Skinnemoen return ret; 21630165508cSHaavard Skinnemoen } 21640165508cSHaavard Skinnemoen 216569423d99SAdrian Hunter static int cfi_atmel_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) 21660165508cSHaavard Skinnemoen { 21670165508cSHaavard Skinnemoen return cfi_varsize_frob(mtd, do_atmel_lock, ofs, len, NULL); 21680165508cSHaavard Skinnemoen } 21690165508cSHaavard Skinnemoen 217069423d99SAdrian Hunter static int cfi_atmel_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) 21710165508cSHaavard Skinnemoen { 21720165508cSHaavard Skinnemoen return cfi_varsize_frob(mtd, do_atmel_unlock, ofs, len, NULL); 21730165508cSHaavard Skinnemoen } 21740165508cSHaavard Skinnemoen 21751da177e4SLinus Torvalds 21761da177e4SLinus Torvalds static void cfi_amdstd_sync (struct mtd_info *mtd) 21771da177e4SLinus Torvalds { 21781da177e4SLinus Torvalds struct map_info *map = mtd->priv; 21791da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 21801da177e4SLinus Torvalds int i; 21811da177e4SLinus Torvalds struct flchip *chip; 21821da177e4SLinus Torvalds int ret = 0; 21831da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 21841da177e4SLinus Torvalds 21851da177e4SLinus Torvalds for (i=0; !ret && i<cfi->numchips; i++) { 21861da177e4SLinus Torvalds chip = &cfi->chips[i]; 21871da177e4SLinus Torvalds 21881da177e4SLinus Torvalds retry: 2189c4e77376SStefani Seibold mutex_lock(&chip->mutex); 21901da177e4SLinus Torvalds 21911da177e4SLinus Torvalds switch(chip->state) { 21921da177e4SLinus Torvalds case FL_READY: 21931da177e4SLinus Torvalds case FL_STATUS: 21941da177e4SLinus Torvalds case FL_CFI_QUERY: 21951da177e4SLinus Torvalds case FL_JEDEC_QUERY: 21961da177e4SLinus Torvalds chip->oldstate = chip->state; 21971da177e4SLinus Torvalds chip->state = FL_SYNCING; 21981da177e4SLinus Torvalds /* No need to wake_up() on this state change - 21991da177e4SLinus Torvalds * as the whole point is that nobody can do anything 22001da177e4SLinus Torvalds * with the chip now anyway. 22011da177e4SLinus Torvalds */ 22021da177e4SLinus Torvalds case FL_SYNCING: 2203c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 22041da177e4SLinus Torvalds break; 22051da177e4SLinus Torvalds 22061da177e4SLinus Torvalds default: 22071da177e4SLinus Torvalds /* Not an idle state */ 2208f8e30e44SDmitry Adamushko set_current_state(TASK_UNINTERRUPTIBLE); 22091da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 22101da177e4SLinus Torvalds 2211c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 22121da177e4SLinus Torvalds 22131da177e4SLinus Torvalds schedule(); 22141da177e4SLinus Torvalds 22151da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 22161da177e4SLinus Torvalds 22171da177e4SLinus Torvalds goto retry; 22181da177e4SLinus Torvalds } 22191da177e4SLinus Torvalds } 22201da177e4SLinus Torvalds 22211da177e4SLinus Torvalds /* Unlock the chips again */ 22221da177e4SLinus Torvalds 22231da177e4SLinus Torvalds for (i--; i >=0; i--) { 22241da177e4SLinus Torvalds chip = &cfi->chips[i]; 22251da177e4SLinus Torvalds 2226c4e77376SStefani Seibold mutex_lock(&chip->mutex); 22271da177e4SLinus Torvalds 22281da177e4SLinus Torvalds if (chip->state == FL_SYNCING) { 22291da177e4SLinus Torvalds chip->state = chip->oldstate; 22301da177e4SLinus Torvalds wake_up(&chip->wq); 22311da177e4SLinus Torvalds } 2232c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 22331da177e4SLinus Torvalds } 22341da177e4SLinus Torvalds } 22351da177e4SLinus Torvalds 22361da177e4SLinus Torvalds 22371da177e4SLinus Torvalds static int cfi_amdstd_suspend(struct mtd_info *mtd) 22381da177e4SLinus Torvalds { 22391da177e4SLinus Torvalds struct map_info *map = mtd->priv; 22401da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 22411da177e4SLinus Torvalds int i; 22421da177e4SLinus Torvalds struct flchip *chip; 22431da177e4SLinus Torvalds int ret = 0; 22441da177e4SLinus Torvalds 22451da177e4SLinus Torvalds for (i=0; !ret && i<cfi->numchips; i++) { 22461da177e4SLinus Torvalds chip = &cfi->chips[i]; 22471da177e4SLinus Torvalds 2248c4e77376SStefani Seibold mutex_lock(&chip->mutex); 22491da177e4SLinus Torvalds 22501da177e4SLinus Torvalds switch(chip->state) { 22511da177e4SLinus Torvalds case FL_READY: 22521da177e4SLinus Torvalds case FL_STATUS: 22531da177e4SLinus Torvalds case FL_CFI_QUERY: 22541da177e4SLinus Torvalds case FL_JEDEC_QUERY: 22551da177e4SLinus Torvalds chip->oldstate = chip->state; 22561da177e4SLinus Torvalds chip->state = FL_PM_SUSPENDED; 22571da177e4SLinus Torvalds /* No need to wake_up() on this state change - 22581da177e4SLinus Torvalds * as the whole point is that nobody can do anything 22591da177e4SLinus Torvalds * with the chip now anyway. 22601da177e4SLinus Torvalds */ 22611da177e4SLinus Torvalds case FL_PM_SUSPENDED: 22621da177e4SLinus Torvalds break; 22631da177e4SLinus Torvalds 22641da177e4SLinus Torvalds default: 22651da177e4SLinus Torvalds ret = -EAGAIN; 22661da177e4SLinus Torvalds break; 22671da177e4SLinus Torvalds } 2268c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 22691da177e4SLinus Torvalds } 22701da177e4SLinus Torvalds 22711da177e4SLinus Torvalds /* Unlock the chips again */ 22721da177e4SLinus Torvalds 22731da177e4SLinus Torvalds if (ret) { 22741da177e4SLinus Torvalds for (i--; i >=0; i--) { 22751da177e4SLinus Torvalds chip = &cfi->chips[i]; 22761da177e4SLinus Torvalds 2277c4e77376SStefani Seibold mutex_lock(&chip->mutex); 22781da177e4SLinus Torvalds 22791da177e4SLinus Torvalds if (chip->state == FL_PM_SUSPENDED) { 22801da177e4SLinus Torvalds chip->state = chip->oldstate; 22811da177e4SLinus Torvalds wake_up(&chip->wq); 22821da177e4SLinus Torvalds } 2283c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 22841da177e4SLinus Torvalds } 22851da177e4SLinus Torvalds } 22861da177e4SLinus Torvalds 22871da177e4SLinus Torvalds return ret; 22881da177e4SLinus Torvalds } 22891da177e4SLinus Torvalds 22901da177e4SLinus Torvalds 22911da177e4SLinus Torvalds static void cfi_amdstd_resume(struct mtd_info *mtd) 22921da177e4SLinus Torvalds { 22931da177e4SLinus Torvalds struct map_info *map = mtd->priv; 22941da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 22951da177e4SLinus Torvalds int i; 22961da177e4SLinus Torvalds struct flchip *chip; 22971da177e4SLinus Torvalds 22981da177e4SLinus Torvalds for (i=0; i<cfi->numchips; i++) { 22991da177e4SLinus Torvalds 23001da177e4SLinus Torvalds chip = &cfi->chips[i]; 23011da177e4SLinus Torvalds 2302c4e77376SStefani Seibold mutex_lock(&chip->mutex); 23031da177e4SLinus Torvalds 23041da177e4SLinus Torvalds if (chip->state == FL_PM_SUSPENDED) { 23051da177e4SLinus Torvalds chip->state = FL_READY; 23061da177e4SLinus Torvalds map_write(map, CMD(0xF0), chip->start); 23071da177e4SLinus Torvalds wake_up(&chip->wq); 23081da177e4SLinus Torvalds } 23091da177e4SLinus Torvalds else 23101da177e4SLinus Torvalds printk(KERN_ERR "Argh. Chip not in PM_SUSPENDED state upon resume()\n"); 23111da177e4SLinus Torvalds 2312c4e77376SStefani Seibold mutex_unlock(&chip->mutex); 23131da177e4SLinus Torvalds } 23141da177e4SLinus Torvalds } 23151da177e4SLinus Torvalds 2316eafe1311SKevin Cernekee 2317eafe1311SKevin Cernekee /* 2318eafe1311SKevin Cernekee * Ensure that the flash device is put back into read array mode before 2319eafe1311SKevin Cernekee * unloading the driver or rebooting. On some systems, rebooting while 2320eafe1311SKevin Cernekee * the flash is in query/program/erase mode will prevent the CPU from 2321eafe1311SKevin Cernekee * fetching the bootloader code, requiring a hard reset or power cycle. 2322eafe1311SKevin Cernekee */ 2323eafe1311SKevin Cernekee static int cfi_amdstd_reset(struct mtd_info *mtd) 2324eafe1311SKevin Cernekee { 2325eafe1311SKevin Cernekee struct map_info *map = mtd->priv; 2326eafe1311SKevin Cernekee struct cfi_private *cfi = map->fldrv_priv; 2327eafe1311SKevin Cernekee int i, ret; 2328eafe1311SKevin Cernekee struct flchip *chip; 2329eafe1311SKevin Cernekee 2330eafe1311SKevin Cernekee for (i = 0; i < cfi->numchips; i++) { 2331eafe1311SKevin Cernekee 2332eafe1311SKevin Cernekee chip = &cfi->chips[i]; 2333eafe1311SKevin Cernekee 2334eafe1311SKevin Cernekee mutex_lock(&chip->mutex); 2335eafe1311SKevin Cernekee 2336eafe1311SKevin Cernekee ret = get_chip(map, chip, chip->start, FL_SHUTDOWN); 2337eafe1311SKevin Cernekee if (!ret) { 2338eafe1311SKevin Cernekee map_write(map, CMD(0xF0), chip->start); 2339eafe1311SKevin Cernekee chip->state = FL_SHUTDOWN; 2340eafe1311SKevin Cernekee put_chip(map, chip, chip->start); 2341eafe1311SKevin Cernekee } 2342eafe1311SKevin Cernekee 2343eafe1311SKevin Cernekee mutex_unlock(&chip->mutex); 2344eafe1311SKevin Cernekee } 2345eafe1311SKevin Cernekee 2346eafe1311SKevin Cernekee return 0; 2347eafe1311SKevin Cernekee } 2348eafe1311SKevin Cernekee 2349eafe1311SKevin Cernekee 2350eafe1311SKevin Cernekee static int cfi_amdstd_reboot(struct notifier_block *nb, unsigned long val, 2351eafe1311SKevin Cernekee void *v) 2352eafe1311SKevin Cernekee { 2353eafe1311SKevin Cernekee struct mtd_info *mtd; 2354eafe1311SKevin Cernekee 2355eafe1311SKevin Cernekee mtd = container_of(nb, struct mtd_info, reboot_notifier); 2356eafe1311SKevin Cernekee cfi_amdstd_reset(mtd); 2357eafe1311SKevin Cernekee return NOTIFY_DONE; 2358eafe1311SKevin Cernekee } 2359eafe1311SKevin Cernekee 2360eafe1311SKevin Cernekee 23611da177e4SLinus Torvalds static void cfi_amdstd_destroy(struct mtd_info *mtd) 23621da177e4SLinus Torvalds { 23631da177e4SLinus Torvalds struct map_info *map = mtd->priv; 23641da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 2365fa671646SJesper Juhl 2366eafe1311SKevin Cernekee cfi_amdstd_reset(mtd); 2367eafe1311SKevin Cernekee unregister_reboot_notifier(&mtd->reboot_notifier); 23681da177e4SLinus Torvalds kfree(cfi->cmdset_priv); 23691da177e4SLinus Torvalds kfree(cfi->cfiq); 23701da177e4SLinus Torvalds kfree(cfi); 23711da177e4SLinus Torvalds kfree(mtd->eraseregions); 23721da177e4SLinus Torvalds } 23731da177e4SLinus Torvalds 23741da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 23751da177e4SLinus Torvalds MODULE_AUTHOR("Crossnet Co. <info@crossnet.co.jp> et al."); 23761da177e4SLinus Torvalds MODULE_DESCRIPTION("MTD chip driver for AMD/Fujitsu flash chips"); 237780461128SGuillaume LECERF MODULE_ALIAS("cfi_cmdset_0006"); 23781e804cecSDavid Woodhouse MODULE_ALIAS("cfi_cmdset_0701"); 2379