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> 351da177e4SLinus Torvalds #include <linux/mtd/compatmac.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 MANUFACTURER_AMD 0x0001 470165508cSHaavard Skinnemoen #define MANUFACTURER_ATMEL 0x001F 4887e92c06SChristopher Moore #define MANUFACTURER_MACRONIX 0x00C2 491da177e4SLinus Torvalds #define MANUFACTURER_SST 0x00BF 501da177e4SLinus Torvalds #define SST49LF004B 0x0060 5189072ef9SRyan Jackson #define SST49LF040B 0x0050 52fb4a90bfSEric W. Biedermann #define SST49LF008A 0x005a 530165508cSHaavard Skinnemoen #define AT49BV6416 0x00d6 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); 561da177e4SLinus Torvalds static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); 571da177e4SLinus Torvalds static int cfi_amdstd_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); 581da177e4SLinus Torvalds static int cfi_amdstd_erase_chip(struct mtd_info *, struct erase_info *); 591da177e4SLinus Torvalds static int cfi_amdstd_erase_varsize(struct mtd_info *, struct erase_info *); 601da177e4SLinus Torvalds static void cfi_amdstd_sync (struct mtd_info *); 611da177e4SLinus Torvalds static int cfi_amdstd_suspend (struct mtd_info *); 621da177e4SLinus Torvalds static void cfi_amdstd_resume (struct mtd_info *); 631da177e4SLinus Torvalds static int cfi_amdstd_secsi_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); 641da177e4SLinus Torvalds 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. */ 1401da177e4SLinus Torvalds static void fixup_amd_bootblock(struct mtd_info *mtd, void* param) 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 15187e92c06SChristopher Moore DEBUG(MTD_DEBUG_LEVEL1, 15287e92c06SChristopher Moore "%s: JEDEC Vendor ID is 0x%02X Device ID is 0x%02X\n", 15387e92c06SChristopher Moore map->name, cfi->mfr, cfi->id); 15487e92c06SChristopher Moore 15587e92c06SChristopher Moore /* AFAICS all 29LV400 with a bottom boot block have a device ID 15687e92c06SChristopher Moore * of 0x22BA in 16-bit mode and 0xBA in 8-bit mode. 15787e92c06SChristopher Moore * These were badly detected as they have the 0x80 bit set 15887e92c06SChristopher Moore * so treat them as a special case. 15987e92c06SChristopher Moore */ 16087e92c06SChristopher Moore if (((cfi->id == 0xBA) || (cfi->id == 0x22BA)) && 16187e92c06SChristopher Moore 16287e92c06SChristopher Moore /* Macronix added CFI to their 2nd generation 16387e92c06SChristopher Moore * MX29LV400C B/T but AFAICS no other 29LV400 (AMD, 16487e92c06SChristopher Moore * Fujitsu, Spansion, EON, ESI and older Macronix) 16587e92c06SChristopher Moore * has CFI. 16687e92c06SChristopher Moore * 16787e92c06SChristopher Moore * Therefore also check the manufacturer. 16887e92c06SChristopher Moore * This reduces the risk of false detection due to 16987e92c06SChristopher Moore * the 8-bit device ID. 17087e92c06SChristopher Moore */ 17187e92c06SChristopher Moore (cfi->mfr == MANUFACTURER_MACRONIX)) { 17287e92c06SChristopher Moore DEBUG(MTD_DEBUG_LEVEL1, 17387e92c06SChristopher Moore "%s: Macronix MX29LV400C with bottom boot block" 17487e92c06SChristopher Moore " detected\n", map->name); 17587e92c06SChristopher Moore extp->TopBottom = 2; /* bottom boot */ 17687e92c06SChristopher Moore } else 1771da177e4SLinus Torvalds if (cfi->id & 0x80) { 1781da177e4SLinus Torvalds printk(KERN_WARNING "%s: JEDEC Device ID is 0x%02X. Assuming broken CFI table.\n", map->name, cfi->id); 1791da177e4SLinus Torvalds extp->TopBottom = 3; /* top boot */ 1801da177e4SLinus Torvalds } else { 1811da177e4SLinus Torvalds extp->TopBottom = 2; /* bottom boot */ 1821da177e4SLinus Torvalds } 18387e92c06SChristopher Moore 18487e92c06SChristopher Moore DEBUG(MTD_DEBUG_LEVEL1, 18587e92c06SChristopher Moore "%s: AMD CFI PRI V%c.%c has no boot block field;" 18687e92c06SChristopher Moore " deduced %s from Device ID\n", map->name, major, minor, 18787e92c06SChristopher Moore extp->TopBottom == 2 ? "bottom" : "top"); 1881da177e4SLinus Torvalds } 1891da177e4SLinus Torvalds } 1901da177e4SLinus Torvalds #endif 1911da177e4SLinus Torvalds 1921da177e4SLinus Torvalds static void fixup_use_write_buffers(struct mtd_info *mtd, void *param) 1931da177e4SLinus Torvalds { 1941da177e4SLinus Torvalds struct map_info *map = mtd->priv; 1951da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 1961da177e4SLinus Torvalds if (cfi->cfiq->BufWriteTimeoutTyp) { 1971da177e4SLinus Torvalds DEBUG(MTD_DEBUG_LEVEL1, "Using buffer write method\n" ); 1981da177e4SLinus Torvalds mtd->write = cfi_amdstd_write_buffers; 1991da177e4SLinus Torvalds } 2001da177e4SLinus Torvalds } 2011da177e4SLinus Torvalds 2025b0c5c2cSHaavard Skinnemoen /* Atmel chips don't use the same PRI format as AMD chips */ 2035b0c5c2cSHaavard Skinnemoen static void fixup_convert_atmel_pri(struct mtd_info *mtd, void *param) 2045b0c5c2cSHaavard Skinnemoen { 2055b0c5c2cSHaavard Skinnemoen struct map_info *map = mtd->priv; 2065b0c5c2cSHaavard Skinnemoen struct cfi_private *cfi = map->fldrv_priv; 2075b0c5c2cSHaavard Skinnemoen struct cfi_pri_amdstd *extp = cfi->cmdset_priv; 2085b0c5c2cSHaavard Skinnemoen struct cfi_pri_atmel atmel_pri; 2095b0c5c2cSHaavard Skinnemoen 2105b0c5c2cSHaavard Skinnemoen memcpy(&atmel_pri, extp, sizeof(atmel_pri)); 211de591dacSHåvard Skinnemoen memset((char *)extp + 5, 0, sizeof(*extp) - 5); 2125b0c5c2cSHaavard Skinnemoen 2135b0c5c2cSHaavard Skinnemoen if (atmel_pri.Features & 0x02) 2145b0c5c2cSHaavard Skinnemoen extp->EraseSuspend = 2; 2155b0c5c2cSHaavard Skinnemoen 216be8f78b8SHaavard Skinnemoen /* Some chips got it backwards... */ 217be8f78b8SHaavard Skinnemoen if (cfi->id == AT49BV6416) { 218be8f78b8SHaavard Skinnemoen if (atmel_pri.BottomBoot) 219be8f78b8SHaavard Skinnemoen extp->TopBottom = 3; 220be8f78b8SHaavard Skinnemoen else 221be8f78b8SHaavard Skinnemoen extp->TopBottom = 2; 222be8f78b8SHaavard Skinnemoen } else { 2235b0c5c2cSHaavard Skinnemoen if (atmel_pri.BottomBoot) 2245b0c5c2cSHaavard Skinnemoen extp->TopBottom = 2; 2255b0c5c2cSHaavard Skinnemoen else 2265b0c5c2cSHaavard Skinnemoen extp->TopBottom = 3; 227be8f78b8SHaavard Skinnemoen } 228d10a39d1SHans-Christian Egtvedt 229d10a39d1SHans-Christian Egtvedt /* burst write mode not supported */ 230d10a39d1SHans-Christian Egtvedt cfi->cfiq->BufWriteTimeoutTyp = 0; 231d10a39d1SHans-Christian Egtvedt cfi->cfiq->BufWriteTimeoutMax = 0; 2325b0c5c2cSHaavard Skinnemoen } 2335b0c5c2cSHaavard Skinnemoen 2341da177e4SLinus Torvalds static void fixup_use_secsi(struct mtd_info *mtd, void *param) 2351da177e4SLinus Torvalds { 2361da177e4SLinus Torvalds /* Setup for chips with a secsi area */ 2371da177e4SLinus Torvalds mtd->read_user_prot_reg = cfi_amdstd_secsi_read; 2381da177e4SLinus Torvalds mtd->read_fact_prot_reg = cfi_amdstd_secsi_read; 2391da177e4SLinus Torvalds } 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds static void fixup_use_erase_chip(struct mtd_info *mtd, void *param) 2421da177e4SLinus Torvalds { 2431da177e4SLinus Torvalds struct map_info *map = mtd->priv; 2441da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 2451da177e4SLinus Torvalds if ((cfi->cfiq->NumEraseRegions == 1) && 2461da177e4SLinus Torvalds ((cfi->cfiq->EraseRegionInfo[0] & 0xffff) == 0)) { 2471da177e4SLinus Torvalds mtd->erase = cfi_amdstd_erase_chip; 2481da177e4SLinus Torvalds } 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds } 2511da177e4SLinus Torvalds 2520165508cSHaavard Skinnemoen /* 2530165508cSHaavard Skinnemoen * Some Atmel chips (e.g. the AT49BV6416) power-up with all sectors 2540165508cSHaavard Skinnemoen * locked by default. 2550165508cSHaavard Skinnemoen */ 2560165508cSHaavard Skinnemoen static void fixup_use_atmel_lock(struct mtd_info *mtd, void *param) 2570165508cSHaavard Skinnemoen { 2580165508cSHaavard Skinnemoen mtd->lock = cfi_atmel_lock; 2590165508cSHaavard Skinnemoen mtd->unlock = cfi_atmel_unlock; 260e619a75fSJustin Treon mtd->flags |= MTD_POWERUP_LOCK; 2610165508cSHaavard Skinnemoen } 2620165508cSHaavard Skinnemoen 26370b07255STrent Piepho static void fixup_s29gl064n_sectors(struct mtd_info *mtd, void *param) 26470b07255STrent Piepho { 26570b07255STrent Piepho struct map_info *map = mtd->priv; 26670b07255STrent Piepho struct cfi_private *cfi = map->fldrv_priv; 26770b07255STrent Piepho 26870b07255STrent Piepho if ((cfi->cfiq->EraseRegionInfo[0] & 0xffff) == 0x003f) { 26970b07255STrent Piepho cfi->cfiq->EraseRegionInfo[0] |= 0x0040; 27070b07255STrent Piepho pr_warning("%s: Bad S29GL064N CFI data, adjust from 64 to 128 sectors\n", mtd->name); 27170b07255STrent Piepho } 27270b07255STrent Piepho } 27370b07255STrent Piepho 27470b07255STrent Piepho static void fixup_s29gl032n_sectors(struct mtd_info *mtd, void *param) 27570b07255STrent Piepho { 27670b07255STrent Piepho struct map_info *map = mtd->priv; 27770b07255STrent Piepho struct cfi_private *cfi = map->fldrv_priv; 27870b07255STrent Piepho 27970b07255STrent Piepho if ((cfi->cfiq->EraseRegionInfo[1] & 0xffff) == 0x007e) { 28070b07255STrent Piepho cfi->cfiq->EraseRegionInfo[1] &= ~0x0040; 28170b07255STrent Piepho pr_warning("%s: Bad S29GL032N CFI data, adjust from 127 to 63 sectors\n", mtd->name); 28270b07255STrent Piepho } 28370b07255STrent Piepho } 28470b07255STrent Piepho 2851da177e4SLinus Torvalds static struct cfi_fixup cfi_fixup_table[] = { 286d10a39d1SHans-Christian Egtvedt { CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri, NULL }, 2871da177e4SLinus Torvalds #ifdef AMD_BOOTLOC_BUG 2881da177e4SLinus Torvalds { CFI_MFR_AMD, CFI_ID_ANY, fixup_amd_bootblock, NULL }, 28987e92c06SChristopher Moore { MANUFACTURER_MACRONIX, CFI_ID_ANY, fixup_amd_bootblock, NULL }, 2901da177e4SLinus Torvalds #endif 2911da177e4SLinus Torvalds { CFI_MFR_AMD, 0x0050, fixup_use_secsi, NULL, }, 2921da177e4SLinus Torvalds { CFI_MFR_AMD, 0x0053, fixup_use_secsi, NULL, }, 2931da177e4SLinus Torvalds { CFI_MFR_AMD, 0x0055, fixup_use_secsi, NULL, }, 2941da177e4SLinus Torvalds { CFI_MFR_AMD, 0x0056, fixup_use_secsi, NULL, }, 2951da177e4SLinus Torvalds { CFI_MFR_AMD, 0x005C, fixup_use_secsi, NULL, }, 2961da177e4SLinus Torvalds { CFI_MFR_AMD, 0x005F, fixup_use_secsi, NULL, }, 29770b07255STrent Piepho { CFI_MFR_AMD, 0x0c01, fixup_s29gl064n_sectors, NULL, }, 29870b07255STrent Piepho { CFI_MFR_AMD, 0x1301, fixup_s29gl064n_sectors, NULL, }, 29970b07255STrent Piepho { CFI_MFR_AMD, 0x1a00, fixup_s29gl032n_sectors, NULL, }, 30070b07255STrent Piepho { CFI_MFR_AMD, 0x1a01, fixup_s29gl032n_sectors, NULL, }, 3011da177e4SLinus Torvalds #if !FORCE_WORD_WRITE 3021da177e4SLinus Torvalds { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL, }, 3031da177e4SLinus Torvalds #endif 3041da177e4SLinus Torvalds { 0, 0, NULL, NULL } 3051da177e4SLinus Torvalds }; 3061da177e4SLinus Torvalds static struct cfi_fixup jedec_fixup_table[] = { 3071da177e4SLinus Torvalds { MANUFACTURER_SST, SST49LF004B, fixup_use_fwh_lock, NULL, }, 30889072ef9SRyan Jackson { MANUFACTURER_SST, SST49LF040B, fixup_use_fwh_lock, NULL, }, 309fb4a90bfSEric W. Biedermann { MANUFACTURER_SST, SST49LF008A, fixup_use_fwh_lock, NULL, }, 3101da177e4SLinus Torvalds { 0, 0, NULL, NULL } 3111da177e4SLinus Torvalds }; 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvalds static struct cfi_fixup fixup_table[] = { 3141da177e4SLinus Torvalds /* The CFI vendor ids and the JEDEC vendor IDs appear 3151da177e4SLinus Torvalds * to be common. It is like the devices id's are as 3161da177e4SLinus Torvalds * well. This table is to pick all cases where 3171da177e4SLinus Torvalds * we know that is the case. 3181da177e4SLinus Torvalds */ 3191da177e4SLinus Torvalds { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_erase_chip, NULL }, 3200165508cSHaavard Skinnemoen { CFI_MFR_ATMEL, AT49BV6416, fixup_use_atmel_lock, NULL }, 3211da177e4SLinus Torvalds { 0, 0, NULL, NULL } 3221da177e4SLinus Torvalds }; 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds 325fefae48bSWolfgang Grandegger static void cfi_fixup_major_minor(struct cfi_private *cfi, 326fefae48bSWolfgang Grandegger struct cfi_pri_amdstd *extp) 327fefae48bSWolfgang Grandegger { 328fefae48bSWolfgang Grandegger if (cfi->mfr == CFI_MFR_SAMSUNG && cfi->id == 0x257e && 329fefae48bSWolfgang Grandegger extp->MajorVersion == '0') 330fefae48bSWolfgang Grandegger extp->MajorVersion = '1'; 331fefae48bSWolfgang Grandegger } 332fefae48bSWolfgang Grandegger 3331da177e4SLinus Torvalds struct mtd_info *cfi_cmdset_0002(struct map_info *map, int primary) 3341da177e4SLinus Torvalds { 3351da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 3361da177e4SLinus Torvalds struct mtd_info *mtd; 3371da177e4SLinus Torvalds int i; 3381da177e4SLinus Torvalds 33995b93a0cSBurman Yan mtd = kzalloc(sizeof(*mtd), GFP_KERNEL); 3401da177e4SLinus Torvalds if (!mtd) { 3411da177e4SLinus Torvalds printk(KERN_WARNING "Failed to allocate memory for MTD device\n"); 3421da177e4SLinus Torvalds return NULL; 3431da177e4SLinus Torvalds } 3441da177e4SLinus Torvalds mtd->priv = map; 3451da177e4SLinus Torvalds mtd->type = MTD_NORFLASH; 3461da177e4SLinus Torvalds 3471da177e4SLinus Torvalds /* Fill in the default mtd operations */ 3481da177e4SLinus Torvalds mtd->erase = cfi_amdstd_erase_varsize; 3491da177e4SLinus Torvalds mtd->write = cfi_amdstd_write_words; 3501da177e4SLinus Torvalds mtd->read = cfi_amdstd_read; 3511da177e4SLinus Torvalds mtd->sync = cfi_amdstd_sync; 3521da177e4SLinus Torvalds mtd->suspend = cfi_amdstd_suspend; 3531da177e4SLinus Torvalds mtd->resume = cfi_amdstd_resume; 3541da177e4SLinus Torvalds mtd->flags = MTD_CAP_NORFLASH; 3551da177e4SLinus Torvalds mtd->name = map->name; 356783ed81fSArtem B. Bityutskiy mtd->writesize = 1; 3571da177e4SLinus Torvalds 3581da177e4SLinus Torvalds if (cfi->cfi_mode==CFI_MODE_CFI){ 3591da177e4SLinus Torvalds unsigned char bootloc; 3601da177e4SLinus Torvalds /* 3611da177e4SLinus Torvalds * It's a real CFI chip, not one for which the probe 3621da177e4SLinus Torvalds * routine faked a CFI structure. So we read the feature 3631da177e4SLinus Torvalds * table from it. 3641da177e4SLinus Torvalds */ 3651da177e4SLinus Torvalds __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR; 3661da177e4SLinus Torvalds struct cfi_pri_amdstd *extp; 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds extp = (struct cfi_pri_amdstd*)cfi_read_pri(map, adr, sizeof(*extp), "Amd/Fujitsu"); 3691da177e4SLinus Torvalds if (!extp) { 3701da177e4SLinus Torvalds kfree(mtd); 3711da177e4SLinus Torvalds return NULL; 3721da177e4SLinus Torvalds } 3731da177e4SLinus Torvalds 374fefae48bSWolfgang Grandegger cfi_fixup_major_minor(cfi, extp); 375fefae48bSWolfgang Grandegger 376d88f977bSTodd Poynor if (extp->MajorVersion != '1' || 377d88f977bSTodd Poynor (extp->MinorVersion < '0' || extp->MinorVersion > '4')) { 378d88f977bSTodd Poynor printk(KERN_ERR " Unknown Amd/Fujitsu Extended Query " 379d88f977bSTodd Poynor "version %c.%c.\n", extp->MajorVersion, 380d88f977bSTodd Poynor extp->MinorVersion); 381d88f977bSTodd Poynor kfree(extp); 382d88f977bSTodd Poynor kfree(mtd); 383d88f977bSTodd Poynor return NULL; 384d88f977bSTodd Poynor } 385d88f977bSTodd Poynor 3861da177e4SLinus Torvalds /* Install our own private info structure */ 3871da177e4SLinus Torvalds cfi->cmdset_priv = extp; 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds /* Apply cfi device specific fixups */ 3901da177e4SLinus Torvalds cfi_fixup(mtd, cfi_fixup_table); 3911da177e4SLinus Torvalds 3921da177e4SLinus Torvalds #ifdef DEBUG_CFI_FEATURES 3931da177e4SLinus Torvalds /* Tell the user about it in lots of lovely detail */ 3941da177e4SLinus Torvalds cfi_tell_features(extp); 3951da177e4SLinus Torvalds #endif 3961da177e4SLinus Torvalds 3971da177e4SLinus Torvalds bootloc = extp->TopBottom; 3981da177e4SLinus Torvalds if ((bootloc != 2) && (bootloc != 3)) { 3991da177e4SLinus Torvalds printk(KERN_WARNING "%s: CFI does not contain boot " 4001da177e4SLinus Torvalds "bank location. Assuming top.\n", map->name); 4011da177e4SLinus Torvalds bootloc = 2; 4021da177e4SLinus Torvalds } 4031da177e4SLinus Torvalds 4041da177e4SLinus Torvalds if (bootloc == 3 && cfi->cfiq->NumEraseRegions > 1) { 4051da177e4SLinus Torvalds printk(KERN_WARNING "%s: Swapping erase regions for broken CFI table.\n", map->name); 4061da177e4SLinus Torvalds 4071da177e4SLinus Torvalds for (i=0; i<cfi->cfiq->NumEraseRegions / 2; i++) { 4081da177e4SLinus Torvalds int j = (cfi->cfiq->NumEraseRegions-1)-i; 4091da177e4SLinus Torvalds __u32 swap; 4101da177e4SLinus Torvalds 4111da177e4SLinus Torvalds swap = cfi->cfiq->EraseRegionInfo[i]; 4121da177e4SLinus Torvalds cfi->cfiq->EraseRegionInfo[i] = cfi->cfiq->EraseRegionInfo[j]; 4131da177e4SLinus Torvalds cfi->cfiq->EraseRegionInfo[j] = swap; 4141da177e4SLinus Torvalds } 4151da177e4SLinus Torvalds } 4161da177e4SLinus Torvalds /* Set the default CFI lock/unlock addresses */ 4171da177e4SLinus Torvalds cfi->addr_unlock1 = 0x555; 4181da177e4SLinus Torvalds cfi->addr_unlock2 = 0x2aa; 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds } /* CFI mode */ 4211da177e4SLinus Torvalds else if (cfi->cfi_mode == CFI_MODE_JEDEC) { 4221da177e4SLinus Torvalds /* Apply jedec specific fixups */ 4231da177e4SLinus Torvalds cfi_fixup(mtd, jedec_fixup_table); 4241da177e4SLinus Torvalds } 4251da177e4SLinus Torvalds /* Apply generic fixups */ 4261da177e4SLinus Torvalds cfi_fixup(mtd, fixup_table); 4271da177e4SLinus Torvalds 4281da177e4SLinus Torvalds for (i=0; i< cfi->numchips; i++) { 4291da177e4SLinus Torvalds cfi->chips[i].word_write_time = 1<<cfi->cfiq->WordWriteTimeoutTyp; 4301da177e4SLinus Torvalds cfi->chips[i].buffer_write_time = 1<<cfi->cfiq->BufWriteTimeoutTyp; 4311da177e4SLinus Torvalds cfi->chips[i].erase_time = 1<<cfi->cfiq->BlockEraseTimeoutTyp; 43283d48091SVijay Sampath cfi->chips[i].ref_point_counter = 0; 43383d48091SVijay Sampath init_waitqueue_head(&(cfi->chips[i].wq)); 4341da177e4SLinus Torvalds } 4351da177e4SLinus Torvalds 4361da177e4SLinus Torvalds map->fldrv = &cfi_amdstd_chipdrv; 4371da177e4SLinus Torvalds 4381da177e4SLinus Torvalds return cfi_amdstd_setup(mtd); 4391da177e4SLinus Torvalds } 44083ea4ef2SDavid Woodhouse EXPORT_SYMBOL_GPL(cfi_cmdset_0002); 4411da177e4SLinus Torvalds 4421da177e4SLinus Torvalds static struct mtd_info *cfi_amdstd_setup(struct mtd_info *mtd) 4431da177e4SLinus Torvalds { 4441da177e4SLinus Torvalds struct map_info *map = mtd->priv; 4451da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 4461da177e4SLinus Torvalds unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave; 4471da177e4SLinus Torvalds unsigned long offset = 0; 4481da177e4SLinus Torvalds int i,j; 4491da177e4SLinus Torvalds 4501da177e4SLinus Torvalds printk(KERN_NOTICE "number of %s chips: %d\n", 4511da177e4SLinus Torvalds (cfi->cfi_mode == CFI_MODE_CFI)?"CFI":"JEDEC",cfi->numchips); 4521da177e4SLinus Torvalds /* Select the correct geometry setup */ 4531da177e4SLinus Torvalds mtd->size = devsize * cfi->numchips; 4541da177e4SLinus Torvalds 4551da177e4SLinus Torvalds mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips; 4561da177e4SLinus Torvalds mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) 4571da177e4SLinus Torvalds * mtd->numeraseregions, GFP_KERNEL); 4581da177e4SLinus Torvalds if (!mtd->eraseregions) { 4591da177e4SLinus Torvalds printk(KERN_WARNING "Failed to allocate memory for MTD erase region info\n"); 4601da177e4SLinus Torvalds goto setup_err; 4611da177e4SLinus Torvalds } 4621da177e4SLinus Torvalds 4631da177e4SLinus Torvalds for (i=0; i<cfi->cfiq->NumEraseRegions; i++) { 4641da177e4SLinus Torvalds unsigned long ernum, ersize; 4651da177e4SLinus Torvalds ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave; 4661da177e4SLinus Torvalds ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1; 4671da177e4SLinus Torvalds 4681da177e4SLinus Torvalds if (mtd->erasesize < ersize) { 4691da177e4SLinus Torvalds mtd->erasesize = ersize; 4701da177e4SLinus Torvalds } 4711da177e4SLinus Torvalds for (j=0; j<cfi->numchips; j++) { 4721da177e4SLinus Torvalds mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset; 4731da177e4SLinus Torvalds mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize; 4741da177e4SLinus Torvalds mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum; 4751da177e4SLinus Torvalds } 4761da177e4SLinus Torvalds offset += (ersize * ernum); 4771da177e4SLinus Torvalds } 4781da177e4SLinus Torvalds if (offset != devsize) { 4791da177e4SLinus Torvalds /* Argh */ 4801da177e4SLinus Torvalds printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize); 4811da177e4SLinus Torvalds goto setup_err; 4821da177e4SLinus Torvalds } 4831da177e4SLinus Torvalds #if 0 4841da177e4SLinus Torvalds // debug 4851da177e4SLinus Torvalds for (i=0; i<mtd->numeraseregions;i++){ 4861da177e4SLinus Torvalds printk("%d: offset=0x%x,size=0x%x,blocks=%d\n", 4871da177e4SLinus Torvalds i,mtd->eraseregions[i].offset, 4881da177e4SLinus Torvalds mtd->eraseregions[i].erasesize, 4891da177e4SLinus Torvalds mtd->eraseregions[i].numblocks); 4901da177e4SLinus Torvalds } 4911da177e4SLinus Torvalds #endif 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds /* FIXME: erase-suspend-program is broken. See 4941da177e4SLinus Torvalds http://lists.infradead.org/pipermail/linux-mtd/2003-December/009001.html */ 4951da177e4SLinus Torvalds printk(KERN_NOTICE "cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.\n"); 4961da177e4SLinus Torvalds 4971da177e4SLinus Torvalds __module_get(THIS_MODULE); 4981da177e4SLinus Torvalds return mtd; 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds setup_err: 5011da177e4SLinus Torvalds if(mtd) { 5021da177e4SLinus Torvalds kfree(mtd->eraseregions); 5031da177e4SLinus Torvalds kfree(mtd); 5041da177e4SLinus Torvalds } 5051da177e4SLinus Torvalds kfree(cfi->cmdset_priv); 5061da177e4SLinus Torvalds kfree(cfi->cfiq); 5071da177e4SLinus Torvalds return NULL; 5081da177e4SLinus Torvalds } 5091da177e4SLinus Torvalds 5101da177e4SLinus Torvalds /* 5111da177e4SLinus Torvalds * Return true if the chip is ready. 5121da177e4SLinus Torvalds * 5131da177e4SLinus Torvalds * Ready is one of: read mode, query mode, erase-suspend-read mode (in any 5141da177e4SLinus Torvalds * non-suspended sector) and is indicated by no toggle bits toggling. 5151da177e4SLinus Torvalds * 5161da177e4SLinus Torvalds * Note that anything more complicated than checking if no bits are toggling 5171da177e4SLinus Torvalds * (including checking DQ5 for an error status) is tricky to get working 5181da177e4SLinus Torvalds * correctly and is therefore not done (particulary with interleaved chips 5191da177e4SLinus Torvalds * as each chip must be checked independantly of the others). 5201da177e4SLinus Torvalds */ 52102b15e34STodd Poynor static int __xipram chip_ready(struct map_info *map, unsigned long addr) 5221da177e4SLinus Torvalds { 5231da177e4SLinus Torvalds map_word d, t; 5241da177e4SLinus Torvalds 5251da177e4SLinus Torvalds d = map_read(map, addr); 5261da177e4SLinus Torvalds t = map_read(map, addr); 5271da177e4SLinus Torvalds 5281da177e4SLinus Torvalds return map_word_equal(map, d, t); 5291da177e4SLinus Torvalds } 5301da177e4SLinus Torvalds 531fb4a90bfSEric W. Biedermann /* 532fb4a90bfSEric W. Biedermann * Return true if the chip is ready and has the correct value. 533fb4a90bfSEric W. Biedermann * 534fb4a90bfSEric W. Biedermann * Ready is one of: read mode, query mode, erase-suspend-read mode (in any 535fb4a90bfSEric W. Biedermann * non-suspended sector) and it is indicated by no bits toggling. 536fb4a90bfSEric W. Biedermann * 537fb4a90bfSEric W. Biedermann * Error are indicated by toggling bits or bits held with the wrong value, 538fb4a90bfSEric W. Biedermann * or with bits toggling. 539fb4a90bfSEric W. Biedermann * 540fb4a90bfSEric W. Biedermann * Note that anything more complicated than checking if no bits are toggling 541fb4a90bfSEric W. Biedermann * (including checking DQ5 for an error status) is tricky to get working 542fb4a90bfSEric W. Biedermann * correctly and is therefore not done (particulary with interleaved chips 543fb4a90bfSEric W. Biedermann * as each chip must be checked independantly of the others). 544fb4a90bfSEric W. Biedermann * 545fb4a90bfSEric W. Biedermann */ 54602b15e34STodd Poynor static int __xipram chip_good(struct map_info *map, unsigned long addr, map_word expected) 547fb4a90bfSEric W. Biedermann { 548fb4a90bfSEric W. Biedermann map_word oldd, curd; 549fb4a90bfSEric W. Biedermann 550fb4a90bfSEric W. Biedermann oldd = map_read(map, addr); 551fb4a90bfSEric W. Biedermann curd = map_read(map, addr); 552fb4a90bfSEric W. Biedermann 553fb4a90bfSEric W. Biedermann return map_word_equal(map, oldd, curd) && 554fb4a90bfSEric W. Biedermann map_word_equal(map, curd, expected); 555fb4a90bfSEric W. Biedermann } 556fb4a90bfSEric W. Biedermann 5571da177e4SLinus Torvalds static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode) 5581da177e4SLinus Torvalds { 5591da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 5601da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 5611da177e4SLinus Torvalds unsigned long timeo; 5621da177e4SLinus Torvalds struct cfi_pri_amdstd *cfip = (struct cfi_pri_amdstd *)cfi->cmdset_priv; 5631da177e4SLinus Torvalds 5641da177e4SLinus Torvalds resettime: 5651da177e4SLinus Torvalds timeo = jiffies + HZ; 5661da177e4SLinus Torvalds retry: 5671da177e4SLinus Torvalds switch (chip->state) { 5681da177e4SLinus Torvalds 5691da177e4SLinus Torvalds case FL_STATUS: 5701da177e4SLinus Torvalds for (;;) { 5711da177e4SLinus Torvalds if (chip_ready(map, adr)) 5721da177e4SLinus Torvalds break; 5731da177e4SLinus Torvalds 5741da177e4SLinus Torvalds if (time_after(jiffies, timeo)) { 5751da177e4SLinus Torvalds printk(KERN_ERR "Waiting for chip to be ready timed out.\n"); 57602b15e34STodd Poynor spin_unlock(chip->mutex); 5771da177e4SLinus Torvalds return -EIO; 5781da177e4SLinus Torvalds } 57902b15e34STodd Poynor spin_unlock(chip->mutex); 5801da177e4SLinus Torvalds cfi_udelay(1); 58102b15e34STodd Poynor spin_lock(chip->mutex); 5821da177e4SLinus Torvalds /* Someone else might have been playing with it. */ 5831da177e4SLinus Torvalds goto retry; 5841da177e4SLinus Torvalds } 5851da177e4SLinus Torvalds 5861da177e4SLinus Torvalds case FL_READY: 5871da177e4SLinus Torvalds case FL_CFI_QUERY: 5881da177e4SLinus Torvalds case FL_JEDEC_QUERY: 5891da177e4SLinus Torvalds return 0; 5901da177e4SLinus Torvalds 5911da177e4SLinus Torvalds case FL_ERASING: 5921da177e4SLinus Torvalds if (mode == FL_WRITING) /* FIXME: Erase-suspend-program appears broken. */ 5931da177e4SLinus Torvalds goto sleep; 5941da177e4SLinus Torvalds 59589072ef9SRyan Jackson if (!( mode == FL_READY 59689072ef9SRyan Jackson || mode == FL_POINT 5971da177e4SLinus Torvalds || !cfip 5981da177e4SLinus Torvalds || (mode == FL_WRITING && (cfip->EraseSuspend & 0x2)) 59989072ef9SRyan Jackson || (mode == FL_WRITING && (cfip->EraseSuspend & 0x1) 60089072ef9SRyan Jackson ))) 6011da177e4SLinus Torvalds goto sleep; 6021da177e4SLinus Torvalds 6031da177e4SLinus Torvalds /* We could check to see if we're trying to access the sector 6041da177e4SLinus Torvalds * that is currently being erased. However, no user will try 6051da177e4SLinus Torvalds * anything like that so we just wait for the timeout. */ 6061da177e4SLinus Torvalds 6071da177e4SLinus Torvalds /* Erase suspend */ 6081da177e4SLinus Torvalds /* It's harmless to issue the Erase-Suspend and Erase-Resume 6091da177e4SLinus Torvalds * commands when the erase algorithm isn't in progress. */ 6101da177e4SLinus Torvalds map_write(map, CMD(0xB0), chip->in_progress_block_addr); 6111da177e4SLinus Torvalds chip->oldstate = FL_ERASING; 6121da177e4SLinus Torvalds chip->state = FL_ERASE_SUSPENDING; 6131da177e4SLinus Torvalds chip->erase_suspended = 1; 6141da177e4SLinus Torvalds for (;;) { 6151da177e4SLinus Torvalds if (chip_ready(map, adr)) 6161da177e4SLinus Torvalds break; 6171da177e4SLinus Torvalds 6181da177e4SLinus Torvalds if (time_after(jiffies, timeo)) { 6191da177e4SLinus Torvalds /* Should have suspended the erase by now. 6201da177e4SLinus Torvalds * Send an Erase-Resume command as either 6211da177e4SLinus Torvalds * there was an error (so leave the erase 6221da177e4SLinus Torvalds * routine to recover from it) or we trying to 6231da177e4SLinus Torvalds * use the erase-in-progress sector. */ 6241da177e4SLinus Torvalds map_write(map, CMD(0x30), chip->in_progress_block_addr); 6251da177e4SLinus Torvalds chip->state = FL_ERASING; 6261da177e4SLinus Torvalds chip->oldstate = FL_READY; 6271da177e4SLinus Torvalds printk(KERN_ERR "MTD %s(): chip not ready after erase suspend\n", __func__); 6281da177e4SLinus Torvalds return -EIO; 6291da177e4SLinus Torvalds } 6301da177e4SLinus Torvalds 63102b15e34STodd Poynor spin_unlock(chip->mutex); 6321da177e4SLinus Torvalds cfi_udelay(1); 63302b15e34STodd Poynor spin_lock(chip->mutex); 6341da177e4SLinus Torvalds /* Nobody will touch it while it's in state FL_ERASE_SUSPENDING. 6351da177e4SLinus Torvalds So we can just loop here. */ 6361da177e4SLinus Torvalds } 6371da177e4SLinus Torvalds chip->state = FL_READY; 6381da177e4SLinus Torvalds return 0; 6391da177e4SLinus Torvalds 64002b15e34STodd Poynor case FL_XIP_WHILE_ERASING: 64102b15e34STodd Poynor if (mode != FL_READY && mode != FL_POINT && 64202b15e34STodd Poynor (!cfip || !(cfip->EraseSuspend&2))) 64302b15e34STodd Poynor goto sleep; 64402b15e34STodd Poynor chip->oldstate = chip->state; 64502b15e34STodd Poynor chip->state = FL_READY; 64602b15e34STodd Poynor return 0; 64702b15e34STodd Poynor 6481da177e4SLinus Torvalds case FL_POINT: 6491da177e4SLinus Torvalds /* Only if there's no operation suspended... */ 6501da177e4SLinus Torvalds if (mode == FL_READY && chip->oldstate == FL_READY) 6511da177e4SLinus Torvalds return 0; 6521da177e4SLinus Torvalds 6531da177e4SLinus Torvalds default: 6541da177e4SLinus Torvalds sleep: 6551da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 6561da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 65702b15e34STodd Poynor spin_unlock(chip->mutex); 6581da177e4SLinus Torvalds schedule(); 6591da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 66002b15e34STodd Poynor spin_lock(chip->mutex); 6611da177e4SLinus Torvalds goto resettime; 6621da177e4SLinus Torvalds } 6631da177e4SLinus Torvalds } 6641da177e4SLinus Torvalds 6651da177e4SLinus Torvalds 6661da177e4SLinus Torvalds static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr) 6671da177e4SLinus Torvalds { 6681da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds switch(chip->oldstate) { 6711da177e4SLinus Torvalds case FL_ERASING: 6721da177e4SLinus Torvalds chip->state = chip->oldstate; 6731da177e4SLinus Torvalds map_write(map, CMD(0x30), chip->in_progress_block_addr); 6741da177e4SLinus Torvalds chip->oldstate = FL_READY; 6751da177e4SLinus Torvalds chip->state = FL_ERASING; 6761da177e4SLinus Torvalds break; 6771da177e4SLinus Torvalds 67802b15e34STodd Poynor case FL_XIP_WHILE_ERASING: 67902b15e34STodd Poynor chip->state = chip->oldstate; 68002b15e34STodd Poynor chip->oldstate = FL_READY; 68102b15e34STodd Poynor break; 68202b15e34STodd Poynor 6831da177e4SLinus Torvalds case FL_READY: 6841da177e4SLinus Torvalds case FL_STATUS: 6851da177e4SLinus Torvalds /* We should really make set_vpp() count, rather than doing this */ 6861da177e4SLinus Torvalds DISABLE_VPP(map); 6871da177e4SLinus Torvalds break; 6881da177e4SLinus Torvalds default: 6891da177e4SLinus Torvalds printk(KERN_ERR "MTD: put_chip() called with oldstate %d!!\n", chip->oldstate); 6901da177e4SLinus Torvalds } 6911da177e4SLinus Torvalds wake_up(&chip->wq); 6921da177e4SLinus Torvalds } 6931da177e4SLinus Torvalds 69402b15e34STodd Poynor #ifdef CONFIG_MTD_XIP 69502b15e34STodd Poynor 69602b15e34STodd Poynor /* 69702b15e34STodd Poynor * No interrupt what so ever can be serviced while the flash isn't in array 69802b15e34STodd Poynor * mode. This is ensured by the xip_disable() and xip_enable() functions 69902b15e34STodd Poynor * enclosing any code path where the flash is known not to be in array mode. 70002b15e34STodd Poynor * And within a XIP disabled code path, only functions marked with __xipram 70102b15e34STodd Poynor * may be called and nothing else (it's a good thing to inspect generated 70202b15e34STodd Poynor * assembly to make sure inline functions were actually inlined and that gcc 70302b15e34STodd Poynor * didn't emit calls to its own support functions). Also configuring MTD CFI 70402b15e34STodd Poynor * support to a single buswidth and a single interleave is also recommended. 70502b15e34STodd Poynor */ 706f8eb321bSThomas Gleixner 70702b15e34STodd Poynor static void xip_disable(struct map_info *map, struct flchip *chip, 70802b15e34STodd Poynor unsigned long adr) 70902b15e34STodd Poynor { 71002b15e34STodd Poynor /* TODO: chips with no XIP use should ignore and return */ 71102b15e34STodd Poynor (void) map_read(map, adr); /* ensure mmu mapping is up to date */ 71202b15e34STodd Poynor local_irq_disable(); 71302b15e34STodd Poynor } 71402b15e34STodd Poynor 71502b15e34STodd Poynor static void __xipram xip_enable(struct map_info *map, struct flchip *chip, 71602b15e34STodd Poynor unsigned long adr) 71702b15e34STodd Poynor { 71802b15e34STodd Poynor struct cfi_private *cfi = map->fldrv_priv; 71902b15e34STodd Poynor 72002b15e34STodd Poynor if (chip->state != FL_POINT && chip->state != FL_READY) { 72102b15e34STodd Poynor map_write(map, CMD(0xf0), adr); 72202b15e34STodd Poynor chip->state = FL_READY; 72302b15e34STodd Poynor } 72402b15e34STodd Poynor (void) map_read(map, adr); 72597f927a4SThomas Gleixner xip_iprefetch(); 72602b15e34STodd Poynor local_irq_enable(); 72702b15e34STodd Poynor } 72802b15e34STodd Poynor 72902b15e34STodd Poynor /* 73002b15e34STodd Poynor * When a delay is required for the flash operation to complete, the 73102b15e34STodd Poynor * xip_udelay() function is polling for both the given timeout and pending 73202b15e34STodd Poynor * (but still masked) hardware interrupts. Whenever there is an interrupt 73302b15e34STodd Poynor * pending then the flash erase operation is suspended, array mode restored 73402b15e34STodd Poynor * and interrupts unmasked. Task scheduling might also happen at that 73502b15e34STodd Poynor * point. The CPU eventually returns from the interrupt or the call to 73602b15e34STodd Poynor * schedule() and the suspended flash operation is resumed for the remaining 73702b15e34STodd Poynor * of the delay period. 73802b15e34STodd Poynor * 73902b15e34STodd Poynor * Warning: this function _will_ fool interrupt latency tracing tools. 74002b15e34STodd Poynor */ 74102b15e34STodd Poynor 74202b15e34STodd Poynor static void __xipram xip_udelay(struct map_info *map, struct flchip *chip, 74302b15e34STodd Poynor unsigned long adr, int usec) 74402b15e34STodd Poynor { 74502b15e34STodd Poynor struct cfi_private *cfi = map->fldrv_priv; 74602b15e34STodd Poynor struct cfi_pri_amdstd *extp = cfi->cmdset_priv; 74702b15e34STodd Poynor map_word status, OK = CMD(0x80); 74802b15e34STodd Poynor unsigned long suspended, start = xip_currtime(); 74902b15e34STodd Poynor flstate_t oldstate; 75002b15e34STodd Poynor 75102b15e34STodd Poynor do { 75202b15e34STodd Poynor cpu_relax(); 75302b15e34STodd Poynor if (xip_irqpending() && extp && 75402b15e34STodd Poynor ((chip->state == FL_ERASING && (extp->EraseSuspend & 2))) && 75502b15e34STodd Poynor (cfi_interleave_is_1(cfi) || chip->oldstate == FL_READY)) { 75602b15e34STodd Poynor /* 75702b15e34STodd Poynor * Let's suspend the erase operation when supported. 75802b15e34STodd Poynor * Note that we currently don't try to suspend 75902b15e34STodd Poynor * interleaved chips if there is already another 76002b15e34STodd Poynor * operation suspended (imagine what happens 76102b15e34STodd Poynor * when one chip was already done with the current 76202b15e34STodd Poynor * operation while another chip suspended it, then 76302b15e34STodd Poynor * we resume the whole thing at once). Yes, it 76402b15e34STodd Poynor * can happen! 76502b15e34STodd Poynor */ 76602b15e34STodd Poynor map_write(map, CMD(0xb0), adr); 76702b15e34STodd Poynor usec -= xip_elapsed_since(start); 76802b15e34STodd Poynor suspended = xip_currtime(); 76902b15e34STodd Poynor do { 77002b15e34STodd Poynor if (xip_elapsed_since(suspended) > 100000) { 77102b15e34STodd Poynor /* 77202b15e34STodd Poynor * The chip doesn't want to suspend 77302b15e34STodd Poynor * after waiting for 100 msecs. 77402b15e34STodd Poynor * This is a critical error but there 77502b15e34STodd Poynor * is not much we can do here. 77602b15e34STodd Poynor */ 77702b15e34STodd Poynor return; 77802b15e34STodd Poynor } 77902b15e34STodd Poynor status = map_read(map, adr); 78002b15e34STodd Poynor } while (!map_word_andequal(map, status, OK, OK)); 78102b15e34STodd Poynor 78202b15e34STodd Poynor /* Suspend succeeded */ 78302b15e34STodd Poynor oldstate = chip->state; 78402b15e34STodd Poynor if (!map_word_bitsset(map, status, CMD(0x40))) 78502b15e34STodd Poynor break; 78602b15e34STodd Poynor chip->state = FL_XIP_WHILE_ERASING; 78702b15e34STodd Poynor chip->erase_suspended = 1; 78802b15e34STodd Poynor map_write(map, CMD(0xf0), adr); 78902b15e34STodd Poynor (void) map_read(map, adr); 790ca5c23c3SPaulius Zaleckas xip_iprefetch(); 79102b15e34STodd Poynor local_irq_enable(); 79202b15e34STodd Poynor spin_unlock(chip->mutex); 793ca5c23c3SPaulius Zaleckas xip_iprefetch(); 79402b15e34STodd Poynor cond_resched(); 79502b15e34STodd Poynor 79602b15e34STodd Poynor /* 79702b15e34STodd Poynor * We're back. However someone else might have 79802b15e34STodd Poynor * decided to go write to the chip if we are in 79902b15e34STodd Poynor * a suspended erase state. If so let's wait 80002b15e34STodd Poynor * until it's done. 80102b15e34STodd Poynor */ 80202b15e34STodd Poynor spin_lock(chip->mutex); 80302b15e34STodd Poynor while (chip->state != FL_XIP_WHILE_ERASING) { 80402b15e34STodd Poynor DECLARE_WAITQUEUE(wait, current); 80502b15e34STodd Poynor set_current_state(TASK_UNINTERRUPTIBLE); 80602b15e34STodd Poynor add_wait_queue(&chip->wq, &wait); 80702b15e34STodd Poynor spin_unlock(chip->mutex); 80802b15e34STodd Poynor schedule(); 80902b15e34STodd Poynor remove_wait_queue(&chip->wq, &wait); 81002b15e34STodd Poynor spin_lock(chip->mutex); 81102b15e34STodd Poynor } 81202b15e34STodd Poynor /* Disallow XIP again */ 81302b15e34STodd Poynor local_irq_disable(); 81402b15e34STodd Poynor 81502b15e34STodd Poynor /* Resume the write or erase operation */ 81602b15e34STodd Poynor map_write(map, CMD(0x30), adr); 81702b15e34STodd Poynor chip->state = oldstate; 81802b15e34STodd Poynor start = xip_currtime(); 81902b15e34STodd Poynor } else if (usec >= 1000000/HZ) { 82002b15e34STodd Poynor /* 82102b15e34STodd Poynor * Try to save on CPU power when waiting delay 82202b15e34STodd Poynor * is at least a system timer tick period. 82302b15e34STodd Poynor * No need to be extremely accurate here. 82402b15e34STodd Poynor */ 82502b15e34STodd Poynor xip_cpu_idle(); 82602b15e34STodd Poynor } 82702b15e34STodd Poynor status = map_read(map, adr); 82802b15e34STodd Poynor } while (!map_word_andequal(map, status, OK, OK) 82902b15e34STodd Poynor && xip_elapsed_since(start) < usec); 83002b15e34STodd Poynor } 83102b15e34STodd Poynor 83202b15e34STodd Poynor #define UDELAY(map, chip, adr, usec) xip_udelay(map, chip, adr, usec) 83302b15e34STodd Poynor 83402b15e34STodd Poynor /* 83502b15e34STodd Poynor * The INVALIDATE_CACHED_RANGE() macro is normally used in parallel while 83602b15e34STodd Poynor * the flash is actively programming or erasing since we have to poll for 83702b15e34STodd Poynor * the operation to complete anyway. We can't do that in a generic way with 83802b15e34STodd Poynor * a XIP setup so do it before the actual flash operation in this case 83902b15e34STodd Poynor * and stub it out from INVALIDATE_CACHE_UDELAY. 84002b15e34STodd Poynor */ 84102b15e34STodd Poynor #define XIP_INVAL_CACHED_RANGE(map, from, size) \ 84202b15e34STodd Poynor INVALIDATE_CACHED_RANGE(map, from, size) 84302b15e34STodd Poynor 84402b15e34STodd Poynor #define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \ 84502b15e34STodd Poynor UDELAY(map, chip, adr, usec) 84602b15e34STodd Poynor 84702b15e34STodd Poynor /* 84802b15e34STodd Poynor * Extra notes: 84902b15e34STodd Poynor * 85002b15e34STodd Poynor * Activating this XIP support changes the way the code works a bit. For 85102b15e34STodd Poynor * example the code to suspend the current process when concurrent access 85202b15e34STodd Poynor * happens is never executed because xip_udelay() will always return with the 85302b15e34STodd Poynor * same chip state as it was entered with. This is why there is no care for 85402b15e34STodd Poynor * the presence of add_wait_queue() or schedule() calls from within a couple 85502b15e34STodd Poynor * xip_disable()'d areas of code, like in do_erase_oneblock for example. 85602b15e34STodd Poynor * The queueing and scheduling are always happening within xip_udelay(). 85702b15e34STodd Poynor * 85802b15e34STodd Poynor * Similarly, get_chip() and put_chip() just happen to always be executed 85902b15e34STodd Poynor * with chip->state set to FL_READY (or FL_XIP_WHILE_*) where flash state 86002b15e34STodd Poynor * is in array mode, therefore never executing many cases therein and not 86102b15e34STodd Poynor * causing any problem with XIP. 86202b15e34STodd Poynor */ 86302b15e34STodd Poynor 86402b15e34STodd Poynor #else 86502b15e34STodd Poynor 86602b15e34STodd Poynor #define xip_disable(map, chip, adr) 86702b15e34STodd Poynor #define xip_enable(map, chip, adr) 86802b15e34STodd Poynor #define XIP_INVAL_CACHED_RANGE(x...) 86902b15e34STodd Poynor 87002b15e34STodd Poynor #define UDELAY(map, chip, adr, usec) \ 87102b15e34STodd Poynor do { \ 87202b15e34STodd Poynor spin_unlock(chip->mutex); \ 87302b15e34STodd Poynor cfi_udelay(usec); \ 87402b15e34STodd Poynor spin_lock(chip->mutex); \ 87502b15e34STodd Poynor } while (0) 87602b15e34STodd Poynor 87702b15e34STodd Poynor #define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \ 87802b15e34STodd Poynor do { \ 87902b15e34STodd Poynor spin_unlock(chip->mutex); \ 88002b15e34STodd Poynor INVALIDATE_CACHED_RANGE(map, adr, len); \ 88102b15e34STodd Poynor cfi_udelay(usec); \ 88202b15e34STodd Poynor spin_lock(chip->mutex); \ 88302b15e34STodd Poynor } while (0) 88402b15e34STodd Poynor 88502b15e34STodd Poynor #endif 8861da177e4SLinus Torvalds 8871da177e4SLinus Torvalds static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) 8881da177e4SLinus Torvalds { 8891da177e4SLinus Torvalds unsigned long cmd_addr; 8901da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 8911da177e4SLinus Torvalds int ret; 8921da177e4SLinus Torvalds 8931da177e4SLinus Torvalds adr += chip->start; 8941da177e4SLinus Torvalds 8951da177e4SLinus Torvalds /* Ensure cmd read/writes are aligned. */ 8961da177e4SLinus Torvalds cmd_addr = adr & ~(map_bankwidth(map)-1); 8971da177e4SLinus Torvalds 89802b15e34STodd Poynor spin_lock(chip->mutex); 8991da177e4SLinus Torvalds ret = get_chip(map, chip, cmd_addr, FL_READY); 9001da177e4SLinus Torvalds if (ret) { 90102b15e34STodd Poynor spin_unlock(chip->mutex); 9021da177e4SLinus Torvalds return ret; 9031da177e4SLinus Torvalds } 9041da177e4SLinus Torvalds 9051da177e4SLinus Torvalds if (chip->state != FL_POINT && chip->state != FL_READY) { 9061da177e4SLinus Torvalds map_write(map, CMD(0xf0), cmd_addr); 9071da177e4SLinus Torvalds chip->state = FL_READY; 9081da177e4SLinus Torvalds } 9091da177e4SLinus Torvalds 9101da177e4SLinus Torvalds map_copy_from(map, buf, adr, len); 9111da177e4SLinus Torvalds 9121da177e4SLinus Torvalds put_chip(map, chip, cmd_addr); 9131da177e4SLinus Torvalds 91402b15e34STodd Poynor spin_unlock(chip->mutex); 9151da177e4SLinus Torvalds return 0; 9161da177e4SLinus Torvalds } 9171da177e4SLinus Torvalds 9181da177e4SLinus Torvalds 9191da177e4SLinus Torvalds static int cfi_amdstd_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) 9201da177e4SLinus Torvalds { 9211da177e4SLinus Torvalds struct map_info *map = mtd->priv; 9221da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 9231da177e4SLinus Torvalds unsigned long ofs; 9241da177e4SLinus Torvalds int chipnum; 9251da177e4SLinus Torvalds int ret = 0; 9261da177e4SLinus Torvalds 9271da177e4SLinus Torvalds /* ofs: offset within the first chip that the first read should start */ 9281da177e4SLinus Torvalds 9291da177e4SLinus Torvalds chipnum = (from >> cfi->chipshift); 9301da177e4SLinus Torvalds ofs = from - (chipnum << cfi->chipshift); 9311da177e4SLinus Torvalds 9321da177e4SLinus Torvalds 9331da177e4SLinus Torvalds *retlen = 0; 9341da177e4SLinus Torvalds 9351da177e4SLinus Torvalds while (len) { 9361da177e4SLinus Torvalds unsigned long thislen; 9371da177e4SLinus Torvalds 9381da177e4SLinus Torvalds if (chipnum >= cfi->numchips) 9391da177e4SLinus Torvalds break; 9401da177e4SLinus Torvalds 9411da177e4SLinus Torvalds if ((len + ofs -1) >> cfi->chipshift) 9421da177e4SLinus Torvalds thislen = (1<<cfi->chipshift) - ofs; 9431da177e4SLinus Torvalds else 9441da177e4SLinus Torvalds thislen = len; 9451da177e4SLinus Torvalds 9461da177e4SLinus Torvalds ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); 9471da177e4SLinus Torvalds if (ret) 9481da177e4SLinus Torvalds break; 9491da177e4SLinus Torvalds 9501da177e4SLinus Torvalds *retlen += thislen; 9511da177e4SLinus Torvalds len -= thislen; 9521da177e4SLinus Torvalds buf += thislen; 9531da177e4SLinus Torvalds 9541da177e4SLinus Torvalds ofs = 0; 9551da177e4SLinus Torvalds chipnum++; 9561da177e4SLinus Torvalds } 9571da177e4SLinus Torvalds return ret; 9581da177e4SLinus Torvalds } 9591da177e4SLinus Torvalds 9601da177e4SLinus Torvalds 9611da177e4SLinus Torvalds static inline int do_read_secsi_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) 9621da177e4SLinus Torvalds { 9631da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 9641da177e4SLinus Torvalds unsigned long timeo = jiffies + HZ; 9651da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 9661da177e4SLinus Torvalds 9671da177e4SLinus Torvalds retry: 96802b15e34STodd Poynor spin_lock(chip->mutex); 9691da177e4SLinus Torvalds 9701da177e4SLinus Torvalds if (chip->state != FL_READY){ 9711da177e4SLinus Torvalds #if 0 9721da177e4SLinus Torvalds printk(KERN_DEBUG "Waiting for chip to read, status = %d\n", chip->state); 9731da177e4SLinus Torvalds #endif 9741da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 9751da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 9761da177e4SLinus Torvalds 97702b15e34STodd Poynor spin_unlock(chip->mutex); 9781da177e4SLinus Torvalds 9791da177e4SLinus Torvalds schedule(); 9801da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 9811da177e4SLinus Torvalds #if 0 9821da177e4SLinus Torvalds if(signal_pending(current)) 9831da177e4SLinus Torvalds return -EINTR; 9841da177e4SLinus Torvalds #endif 9851da177e4SLinus Torvalds timeo = jiffies + HZ; 9861da177e4SLinus Torvalds 9871da177e4SLinus Torvalds goto retry; 9881da177e4SLinus Torvalds } 9891da177e4SLinus Torvalds 9901da177e4SLinus Torvalds adr += chip->start; 9911da177e4SLinus Torvalds 9921da177e4SLinus Torvalds chip->state = FL_READY; 9931da177e4SLinus Torvalds 9941da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 9951da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 9961da177e4SLinus Torvalds cfi_send_gen_cmd(0x88, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 9971da177e4SLinus Torvalds 9981da177e4SLinus Torvalds map_copy_from(map, buf, adr, len); 9991da177e4SLinus Torvalds 10001da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 10011da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 10021da177e4SLinus Torvalds cfi_send_gen_cmd(0x90, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 10031da177e4SLinus Torvalds cfi_send_gen_cmd(0x00, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 10041da177e4SLinus Torvalds 10051da177e4SLinus Torvalds wake_up(&chip->wq); 100602b15e34STodd Poynor spin_unlock(chip->mutex); 10071da177e4SLinus Torvalds 10081da177e4SLinus Torvalds return 0; 10091da177e4SLinus Torvalds } 10101da177e4SLinus Torvalds 10111da177e4SLinus Torvalds static int cfi_amdstd_secsi_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) 10121da177e4SLinus Torvalds { 10131da177e4SLinus Torvalds struct map_info *map = mtd->priv; 10141da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 10151da177e4SLinus Torvalds unsigned long ofs; 10161da177e4SLinus Torvalds int chipnum; 10171da177e4SLinus Torvalds int ret = 0; 10181da177e4SLinus Torvalds 10191da177e4SLinus Torvalds 10201da177e4SLinus Torvalds /* ofs: offset within the first chip that the first read should start */ 10211da177e4SLinus Torvalds 10221da177e4SLinus Torvalds /* 8 secsi bytes per chip */ 10231da177e4SLinus Torvalds chipnum=from>>3; 10241da177e4SLinus Torvalds ofs=from & 7; 10251da177e4SLinus Torvalds 10261da177e4SLinus Torvalds 10271da177e4SLinus Torvalds *retlen = 0; 10281da177e4SLinus Torvalds 10291da177e4SLinus Torvalds while (len) { 10301da177e4SLinus Torvalds unsigned long thislen; 10311da177e4SLinus Torvalds 10321da177e4SLinus Torvalds if (chipnum >= cfi->numchips) 10331da177e4SLinus Torvalds break; 10341da177e4SLinus Torvalds 10351da177e4SLinus Torvalds if ((len + ofs -1) >> 3) 10361da177e4SLinus Torvalds thislen = (1<<3) - ofs; 10371da177e4SLinus Torvalds else 10381da177e4SLinus Torvalds thislen = len; 10391da177e4SLinus Torvalds 10401da177e4SLinus Torvalds ret = do_read_secsi_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); 10411da177e4SLinus Torvalds if (ret) 10421da177e4SLinus Torvalds break; 10431da177e4SLinus Torvalds 10441da177e4SLinus Torvalds *retlen += thislen; 10451da177e4SLinus Torvalds len -= thislen; 10461da177e4SLinus Torvalds buf += thislen; 10471da177e4SLinus Torvalds 10481da177e4SLinus Torvalds ofs = 0; 10491da177e4SLinus Torvalds chipnum++; 10501da177e4SLinus Torvalds } 10511da177e4SLinus Torvalds return ret; 10521da177e4SLinus Torvalds } 10531da177e4SLinus Torvalds 10541da177e4SLinus Torvalds 105502b15e34STodd Poynor static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, unsigned long adr, map_word datum) 10561da177e4SLinus Torvalds { 10571da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 10581da177e4SLinus Torvalds unsigned long timeo = jiffies + HZ; 10591da177e4SLinus Torvalds /* 10601da177e4SLinus Torvalds * We use a 1ms + 1 jiffies generic timeout for writes (most devices 10611da177e4SLinus Torvalds * have a max write time of a few hundreds usec). However, we should 10621da177e4SLinus Torvalds * use the maximum timeout value given by the chip at probe time 10631da177e4SLinus Torvalds * instead. Unfortunately, struct flchip does have a field for 10641da177e4SLinus Torvalds * maximum timeout, only for typical which can be far too short 10651da177e4SLinus Torvalds * depending of the conditions. The ' + 1' is to avoid having a 10661da177e4SLinus Torvalds * timeout of 0 jiffies if HZ is smaller than 1000. 10671da177e4SLinus Torvalds */ 10681da177e4SLinus Torvalds unsigned long uWriteTimeout = ( HZ / 1000 ) + 1; 10691da177e4SLinus Torvalds int ret = 0; 10701da177e4SLinus Torvalds map_word oldd; 10711da177e4SLinus Torvalds int retry_cnt = 0; 10721da177e4SLinus Torvalds 10731da177e4SLinus Torvalds adr += chip->start; 10741da177e4SLinus Torvalds 107502b15e34STodd Poynor spin_lock(chip->mutex); 10761da177e4SLinus Torvalds ret = get_chip(map, chip, adr, FL_WRITING); 10771da177e4SLinus Torvalds if (ret) { 107802b15e34STodd Poynor spin_unlock(chip->mutex); 10791da177e4SLinus Torvalds return ret; 10801da177e4SLinus Torvalds } 10811da177e4SLinus Torvalds 10821da177e4SLinus Torvalds DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n", 10831da177e4SLinus Torvalds __func__, adr, datum.x[0] ); 10841da177e4SLinus Torvalds 10851da177e4SLinus Torvalds /* 10861da177e4SLinus Torvalds * Check for a NOP for the case when the datum to write is already 10871da177e4SLinus Torvalds * present - it saves time and works around buggy chips that corrupt 10881da177e4SLinus Torvalds * data at other locations when 0xff is written to a location that 10891da177e4SLinus Torvalds * already contains 0xff. 10901da177e4SLinus Torvalds */ 10911da177e4SLinus Torvalds oldd = map_read(map, adr); 10921da177e4SLinus Torvalds if (map_word_equal(map, oldd, datum)) { 10931da177e4SLinus Torvalds DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): NOP\n", 10941da177e4SLinus Torvalds __func__); 10951da177e4SLinus Torvalds goto op_done; 10961da177e4SLinus Torvalds } 10971da177e4SLinus Torvalds 109802b15e34STodd Poynor XIP_INVAL_CACHED_RANGE(map, adr, map_bankwidth(map)); 10991da177e4SLinus Torvalds ENABLE_VPP(map); 110002b15e34STodd Poynor xip_disable(map, chip, adr); 11011da177e4SLinus Torvalds retry: 11021da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 11031da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 11041da177e4SLinus Torvalds cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 11051da177e4SLinus Torvalds map_write(map, datum, adr); 11061da177e4SLinus Torvalds chip->state = FL_WRITING; 11071da177e4SLinus Torvalds 110802b15e34STodd Poynor INVALIDATE_CACHE_UDELAY(map, chip, 110902b15e34STodd Poynor adr, map_bankwidth(map), 111002b15e34STodd Poynor chip->word_write_time); 11111da177e4SLinus Torvalds 11121da177e4SLinus Torvalds /* See comment above for timeout value. */ 11131da177e4SLinus Torvalds timeo = jiffies + uWriteTimeout; 11141da177e4SLinus Torvalds for (;;) { 11151da177e4SLinus Torvalds if (chip->state != FL_WRITING) { 11161da177e4SLinus Torvalds /* Someone's suspended the write. Sleep */ 11171da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 11181da177e4SLinus Torvalds 11191da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 11201da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 112102b15e34STodd Poynor spin_unlock(chip->mutex); 11221da177e4SLinus Torvalds schedule(); 11231da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 11241da177e4SLinus Torvalds timeo = jiffies + (HZ / 2); /* FIXME */ 112502b15e34STodd Poynor spin_lock(chip->mutex); 11261da177e4SLinus Torvalds continue; 11271da177e4SLinus Torvalds } 11281da177e4SLinus Torvalds 1129b95f9609SKonstantin Baidarov if (time_after(jiffies, timeo) && !chip_ready(map, adr)){ 113002b15e34STodd Poynor xip_enable(map, chip, adr); 1131fb4a90bfSEric W. Biedermann printk(KERN_WARNING "MTD %s(): software timeout\n", __func__); 113202b15e34STodd Poynor xip_disable(map, chip, adr); 1133fb4a90bfSEric W. Biedermann break; 1134fb4a90bfSEric W. Biedermann } 1135fb4a90bfSEric W. Biedermann 1136b95f9609SKonstantin Baidarov if (chip_ready(map, adr)) 1137b95f9609SKonstantin Baidarov break; 1138b95f9609SKonstantin Baidarov 11391da177e4SLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 114002b15e34STodd Poynor UDELAY(map, chip, adr, 1); 11411da177e4SLinus Torvalds } 1142fb4a90bfSEric W. Biedermann /* Did we succeed? */ 1143fb4a90bfSEric W. Biedermann if (!chip_good(map, adr, datum)) { 11441da177e4SLinus Torvalds /* reset on all failures. */ 11451da177e4SLinus Torvalds map_write( map, CMD(0xF0), chip->start ); 11461da177e4SLinus Torvalds /* FIXME - should have reset delay before continuing */ 1147fb4a90bfSEric W. Biedermann 11481da177e4SLinus Torvalds if (++retry_cnt <= MAX_WORD_RETRIES) 11491da177e4SLinus Torvalds goto retry; 11501da177e4SLinus Torvalds 11511da177e4SLinus Torvalds ret = -EIO; 1152fb4a90bfSEric W. Biedermann } 115302b15e34STodd Poynor xip_enable(map, chip, adr); 11541da177e4SLinus Torvalds op_done: 11551da177e4SLinus Torvalds chip->state = FL_READY; 11561da177e4SLinus Torvalds put_chip(map, chip, adr); 115702b15e34STodd Poynor spin_unlock(chip->mutex); 11581da177e4SLinus Torvalds 11591da177e4SLinus Torvalds return ret; 11601da177e4SLinus Torvalds } 11611da177e4SLinus Torvalds 11621da177e4SLinus Torvalds 11631da177e4SLinus Torvalds static int cfi_amdstd_write_words(struct mtd_info *mtd, loff_t to, size_t len, 11641da177e4SLinus Torvalds size_t *retlen, const u_char *buf) 11651da177e4SLinus Torvalds { 11661da177e4SLinus Torvalds struct map_info *map = mtd->priv; 11671da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 11681da177e4SLinus Torvalds int ret = 0; 11691da177e4SLinus Torvalds int chipnum; 11701da177e4SLinus Torvalds unsigned long ofs, chipstart; 11711da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 11721da177e4SLinus Torvalds 11731da177e4SLinus Torvalds *retlen = 0; 11741da177e4SLinus Torvalds if (!len) 11751da177e4SLinus Torvalds return 0; 11761da177e4SLinus Torvalds 11771da177e4SLinus Torvalds chipnum = to >> cfi->chipshift; 11781da177e4SLinus Torvalds ofs = to - (chipnum << cfi->chipshift); 11791da177e4SLinus Torvalds chipstart = cfi->chips[chipnum].start; 11801da177e4SLinus Torvalds 11811da177e4SLinus Torvalds /* If it's not bus-aligned, do the first byte write */ 11821da177e4SLinus Torvalds if (ofs & (map_bankwidth(map)-1)) { 11831da177e4SLinus Torvalds unsigned long bus_ofs = ofs & ~(map_bankwidth(map)-1); 11841da177e4SLinus Torvalds int i = ofs - bus_ofs; 11851da177e4SLinus Torvalds int n = 0; 11861da177e4SLinus Torvalds map_word tmp_buf; 11871da177e4SLinus Torvalds 11881da177e4SLinus Torvalds retry: 118902b15e34STodd Poynor spin_lock(cfi->chips[chipnum].mutex); 11901da177e4SLinus Torvalds 11911da177e4SLinus Torvalds if (cfi->chips[chipnum].state != FL_READY) { 11921da177e4SLinus Torvalds #if 0 11931da177e4SLinus Torvalds printk(KERN_DEBUG "Waiting for chip to write, status = %d\n", cfi->chips[chipnum].state); 11941da177e4SLinus Torvalds #endif 11951da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 11961da177e4SLinus Torvalds add_wait_queue(&cfi->chips[chipnum].wq, &wait); 11971da177e4SLinus Torvalds 119802b15e34STodd Poynor spin_unlock(cfi->chips[chipnum].mutex); 11991da177e4SLinus Torvalds 12001da177e4SLinus Torvalds schedule(); 12011da177e4SLinus Torvalds remove_wait_queue(&cfi->chips[chipnum].wq, &wait); 12021da177e4SLinus Torvalds #if 0 12031da177e4SLinus Torvalds if(signal_pending(current)) 12041da177e4SLinus Torvalds return -EINTR; 12051da177e4SLinus Torvalds #endif 12061da177e4SLinus Torvalds goto retry; 12071da177e4SLinus Torvalds } 12081da177e4SLinus Torvalds 12091da177e4SLinus Torvalds /* Load 'tmp_buf' with old contents of flash */ 12101da177e4SLinus Torvalds tmp_buf = map_read(map, bus_ofs+chipstart); 12111da177e4SLinus Torvalds 121202b15e34STodd Poynor spin_unlock(cfi->chips[chipnum].mutex); 12131da177e4SLinus Torvalds 12141da177e4SLinus Torvalds /* Number of bytes to copy from buffer */ 12151da177e4SLinus Torvalds n = min_t(int, len, map_bankwidth(map)-i); 12161da177e4SLinus Torvalds 12171da177e4SLinus Torvalds tmp_buf = map_word_load_partial(map, tmp_buf, buf, i, n); 12181da177e4SLinus Torvalds 12191da177e4SLinus Torvalds ret = do_write_oneword(map, &cfi->chips[chipnum], 12201da177e4SLinus Torvalds bus_ofs, tmp_buf); 12211da177e4SLinus Torvalds if (ret) 12221da177e4SLinus Torvalds return ret; 12231da177e4SLinus Torvalds 12241da177e4SLinus Torvalds ofs += n; 12251da177e4SLinus Torvalds buf += n; 12261da177e4SLinus Torvalds (*retlen) += n; 12271da177e4SLinus Torvalds len -= n; 12281da177e4SLinus Torvalds 12291da177e4SLinus Torvalds if (ofs >> cfi->chipshift) { 12301da177e4SLinus Torvalds chipnum ++; 12311da177e4SLinus Torvalds ofs = 0; 12321da177e4SLinus Torvalds if (chipnum == cfi->numchips) 12331da177e4SLinus Torvalds return 0; 12341da177e4SLinus Torvalds } 12351da177e4SLinus Torvalds } 12361da177e4SLinus Torvalds 12371da177e4SLinus Torvalds /* We are now aligned, write as much as possible */ 12381da177e4SLinus Torvalds while(len >= map_bankwidth(map)) { 12391da177e4SLinus Torvalds map_word datum; 12401da177e4SLinus Torvalds 12411da177e4SLinus Torvalds datum = map_word_load(map, buf); 12421da177e4SLinus Torvalds 12431da177e4SLinus Torvalds ret = do_write_oneword(map, &cfi->chips[chipnum], 12441da177e4SLinus Torvalds ofs, datum); 12451da177e4SLinus Torvalds if (ret) 12461da177e4SLinus Torvalds return ret; 12471da177e4SLinus Torvalds 12481da177e4SLinus Torvalds ofs += map_bankwidth(map); 12491da177e4SLinus Torvalds buf += map_bankwidth(map); 12501da177e4SLinus Torvalds (*retlen) += map_bankwidth(map); 12511da177e4SLinus Torvalds len -= map_bankwidth(map); 12521da177e4SLinus Torvalds 12531da177e4SLinus Torvalds if (ofs >> cfi->chipshift) { 12541da177e4SLinus Torvalds chipnum ++; 12551da177e4SLinus Torvalds ofs = 0; 12561da177e4SLinus Torvalds if (chipnum == cfi->numchips) 12571da177e4SLinus Torvalds return 0; 12581da177e4SLinus Torvalds chipstart = cfi->chips[chipnum].start; 12591da177e4SLinus Torvalds } 12601da177e4SLinus Torvalds } 12611da177e4SLinus Torvalds 12621da177e4SLinus Torvalds /* Write the trailing bytes if any */ 12631da177e4SLinus Torvalds if (len & (map_bankwidth(map)-1)) { 12641da177e4SLinus Torvalds map_word tmp_buf; 12651da177e4SLinus Torvalds 12661da177e4SLinus Torvalds retry1: 126702b15e34STodd Poynor spin_lock(cfi->chips[chipnum].mutex); 12681da177e4SLinus Torvalds 12691da177e4SLinus Torvalds if (cfi->chips[chipnum].state != FL_READY) { 12701da177e4SLinus Torvalds #if 0 12711da177e4SLinus Torvalds printk(KERN_DEBUG "Waiting for chip to write, status = %d\n", cfi->chips[chipnum].state); 12721da177e4SLinus Torvalds #endif 12731da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 12741da177e4SLinus Torvalds add_wait_queue(&cfi->chips[chipnum].wq, &wait); 12751da177e4SLinus Torvalds 127602b15e34STodd Poynor spin_unlock(cfi->chips[chipnum].mutex); 12771da177e4SLinus Torvalds 12781da177e4SLinus Torvalds schedule(); 12791da177e4SLinus Torvalds remove_wait_queue(&cfi->chips[chipnum].wq, &wait); 12801da177e4SLinus Torvalds #if 0 12811da177e4SLinus Torvalds if(signal_pending(current)) 12821da177e4SLinus Torvalds return -EINTR; 12831da177e4SLinus Torvalds #endif 12841da177e4SLinus Torvalds goto retry1; 12851da177e4SLinus Torvalds } 12861da177e4SLinus Torvalds 12871da177e4SLinus Torvalds tmp_buf = map_read(map, ofs + chipstart); 12881da177e4SLinus Torvalds 128902b15e34STodd Poynor spin_unlock(cfi->chips[chipnum].mutex); 12901da177e4SLinus Torvalds 12911da177e4SLinus Torvalds tmp_buf = map_word_load_partial(map, tmp_buf, buf, 0, len); 12921da177e4SLinus Torvalds 12931da177e4SLinus Torvalds ret = do_write_oneword(map, &cfi->chips[chipnum], 12941da177e4SLinus Torvalds ofs, tmp_buf); 12951da177e4SLinus Torvalds if (ret) 12961da177e4SLinus Torvalds return ret; 12971da177e4SLinus Torvalds 12981da177e4SLinus Torvalds (*retlen) += len; 12991da177e4SLinus Torvalds } 13001da177e4SLinus Torvalds 13011da177e4SLinus Torvalds return 0; 13021da177e4SLinus Torvalds } 13031da177e4SLinus Torvalds 13041da177e4SLinus Torvalds 13051da177e4SLinus Torvalds /* 13061da177e4SLinus Torvalds * FIXME: interleaved mode not tested, and probably not supported! 13071da177e4SLinus Torvalds */ 130802b15e34STodd Poynor static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, 130902b15e34STodd Poynor unsigned long adr, const u_char *buf, 131002b15e34STodd Poynor int len) 13111da177e4SLinus Torvalds { 13121da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 13131da177e4SLinus Torvalds unsigned long timeo = jiffies + HZ; 13141da177e4SLinus Torvalds /* see comments in do_write_oneword() regarding uWriteTimeo. */ 13151da177e4SLinus Torvalds unsigned long uWriteTimeout = ( HZ / 1000 ) + 1; 13161da177e4SLinus Torvalds int ret = -EIO; 13171da177e4SLinus Torvalds unsigned long cmd_adr; 13181da177e4SLinus Torvalds int z, words; 13191da177e4SLinus Torvalds map_word datum; 13201da177e4SLinus Torvalds 13211da177e4SLinus Torvalds adr += chip->start; 13221da177e4SLinus Torvalds cmd_adr = adr; 13231da177e4SLinus Torvalds 132402b15e34STodd Poynor spin_lock(chip->mutex); 13251da177e4SLinus Torvalds ret = get_chip(map, chip, adr, FL_WRITING); 13261da177e4SLinus Torvalds if (ret) { 132702b15e34STodd Poynor spin_unlock(chip->mutex); 13281da177e4SLinus Torvalds return ret; 13291da177e4SLinus Torvalds } 13301da177e4SLinus Torvalds 13311da177e4SLinus Torvalds datum = map_word_load(map, buf); 13321da177e4SLinus Torvalds 13331da177e4SLinus Torvalds DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n", 13341da177e4SLinus Torvalds __func__, adr, datum.x[0] ); 13351da177e4SLinus Torvalds 133602b15e34STodd Poynor XIP_INVAL_CACHED_RANGE(map, adr, len); 13371da177e4SLinus Torvalds ENABLE_VPP(map); 133802b15e34STodd Poynor xip_disable(map, chip, cmd_adr); 133902b15e34STodd Poynor 13401da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 13411da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 13421da177e4SLinus Torvalds //cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 13431da177e4SLinus Torvalds 13441da177e4SLinus Torvalds /* Write Buffer Load */ 13451da177e4SLinus Torvalds map_write(map, CMD(0x25), cmd_adr); 13461da177e4SLinus Torvalds 13471da177e4SLinus Torvalds chip->state = FL_WRITING_TO_BUFFER; 13481da177e4SLinus Torvalds 13491da177e4SLinus Torvalds /* Write length of data to come */ 13501da177e4SLinus Torvalds words = len / map_bankwidth(map); 13511da177e4SLinus Torvalds map_write(map, CMD(words - 1), cmd_adr); 13521da177e4SLinus Torvalds /* Write data */ 13531da177e4SLinus Torvalds z = 0; 13541da177e4SLinus Torvalds while(z < words * map_bankwidth(map)) { 13551da177e4SLinus Torvalds datum = map_word_load(map, buf); 13561da177e4SLinus Torvalds map_write(map, datum, adr + z); 13571da177e4SLinus Torvalds 13581da177e4SLinus Torvalds z += map_bankwidth(map); 13591da177e4SLinus Torvalds buf += map_bankwidth(map); 13601da177e4SLinus Torvalds } 13611da177e4SLinus Torvalds z -= map_bankwidth(map); 13621da177e4SLinus Torvalds 13631da177e4SLinus Torvalds adr += z; 13641da177e4SLinus Torvalds 13651da177e4SLinus Torvalds /* Write Buffer Program Confirm: GO GO GO */ 13661da177e4SLinus Torvalds map_write(map, CMD(0x29), cmd_adr); 13671da177e4SLinus Torvalds chip->state = FL_WRITING; 13681da177e4SLinus Torvalds 136902b15e34STodd Poynor INVALIDATE_CACHE_UDELAY(map, chip, 137002b15e34STodd Poynor adr, map_bankwidth(map), 137102b15e34STodd Poynor chip->word_write_time); 13721da177e4SLinus Torvalds 13731da177e4SLinus Torvalds timeo = jiffies + uWriteTimeout; 13741da177e4SLinus Torvalds 13751da177e4SLinus Torvalds for (;;) { 13761da177e4SLinus Torvalds if (chip->state != FL_WRITING) { 13771da177e4SLinus Torvalds /* Someone's suspended the write. Sleep */ 13781da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 13791da177e4SLinus Torvalds 13801da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 13811da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 138202b15e34STodd Poynor spin_unlock(chip->mutex); 13831da177e4SLinus Torvalds schedule(); 13841da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 13851da177e4SLinus Torvalds timeo = jiffies + (HZ / 2); /* FIXME */ 138602b15e34STodd Poynor spin_lock(chip->mutex); 13871da177e4SLinus Torvalds continue; 13881da177e4SLinus Torvalds } 13891da177e4SLinus Torvalds 1390b95f9609SKonstantin Baidarov if (time_after(jiffies, timeo) && !chip_ready(map, adr)) 1391b95f9609SKonstantin Baidarov break; 1392b95f9609SKonstantin Baidarov 139302b15e34STodd Poynor if (chip_ready(map, adr)) { 139402b15e34STodd Poynor xip_enable(map, chip, adr); 13951da177e4SLinus Torvalds goto op_done; 139602b15e34STodd Poynor } 13971da177e4SLinus Torvalds 13981da177e4SLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 139902b15e34STodd Poynor UDELAY(map, chip, adr, 1); 14001da177e4SLinus Torvalds } 14011da177e4SLinus Torvalds 14021da177e4SLinus Torvalds /* reset on all failures. */ 14031da177e4SLinus Torvalds map_write( map, CMD(0xF0), chip->start ); 140402b15e34STodd Poynor xip_enable(map, chip, adr); 14051da177e4SLinus Torvalds /* FIXME - should have reset delay before continuing */ 14061da177e4SLinus Torvalds 140702b15e34STodd Poynor printk(KERN_WARNING "MTD %s(): software timeout\n", 140802b15e34STodd Poynor __func__ ); 140902b15e34STodd Poynor 14101da177e4SLinus Torvalds ret = -EIO; 14111da177e4SLinus Torvalds op_done: 14121da177e4SLinus Torvalds chip->state = FL_READY; 14131da177e4SLinus Torvalds put_chip(map, chip, adr); 141402b15e34STodd Poynor spin_unlock(chip->mutex); 14151da177e4SLinus Torvalds 14161da177e4SLinus Torvalds return ret; 14171da177e4SLinus Torvalds } 14181da177e4SLinus Torvalds 14191da177e4SLinus Torvalds 14201da177e4SLinus Torvalds static int cfi_amdstd_write_buffers(struct mtd_info *mtd, loff_t to, size_t len, 14211da177e4SLinus Torvalds size_t *retlen, const u_char *buf) 14221da177e4SLinus Torvalds { 14231da177e4SLinus Torvalds struct map_info *map = mtd->priv; 14241da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 14251da177e4SLinus Torvalds int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; 14261da177e4SLinus Torvalds int ret = 0; 14271da177e4SLinus Torvalds int chipnum; 14281da177e4SLinus Torvalds unsigned long ofs; 14291da177e4SLinus Torvalds 14301da177e4SLinus Torvalds *retlen = 0; 14311da177e4SLinus Torvalds if (!len) 14321da177e4SLinus Torvalds return 0; 14331da177e4SLinus Torvalds 14341da177e4SLinus Torvalds chipnum = to >> cfi->chipshift; 14351da177e4SLinus Torvalds ofs = to - (chipnum << cfi->chipshift); 14361da177e4SLinus Torvalds 14371da177e4SLinus Torvalds /* If it's not bus-aligned, do the first word write */ 14381da177e4SLinus Torvalds if (ofs & (map_bankwidth(map)-1)) { 14391da177e4SLinus Torvalds size_t local_len = (-ofs)&(map_bankwidth(map)-1); 14401da177e4SLinus Torvalds if (local_len > len) 14411da177e4SLinus Torvalds local_len = len; 14421da177e4SLinus Torvalds ret = cfi_amdstd_write_words(mtd, ofs + (chipnum<<cfi->chipshift), 14431da177e4SLinus Torvalds local_len, retlen, buf); 14441da177e4SLinus Torvalds if (ret) 14451da177e4SLinus Torvalds return ret; 14461da177e4SLinus Torvalds ofs += local_len; 14471da177e4SLinus Torvalds buf += local_len; 14481da177e4SLinus Torvalds len -= local_len; 14491da177e4SLinus Torvalds 14501da177e4SLinus Torvalds if (ofs >> cfi->chipshift) { 14511da177e4SLinus Torvalds chipnum ++; 14521da177e4SLinus Torvalds ofs = 0; 14531da177e4SLinus Torvalds if (chipnum == cfi->numchips) 14541da177e4SLinus Torvalds return 0; 14551da177e4SLinus Torvalds } 14561da177e4SLinus Torvalds } 14571da177e4SLinus Torvalds 14581da177e4SLinus Torvalds /* Write buffer is worth it only if more than one word to write... */ 14591da177e4SLinus Torvalds while (len >= map_bankwidth(map) * 2) { 14601da177e4SLinus Torvalds /* We must not cross write block boundaries */ 14611da177e4SLinus Torvalds int size = wbufsize - (ofs & (wbufsize-1)); 14621da177e4SLinus Torvalds 14631da177e4SLinus Torvalds if (size > len) 14641da177e4SLinus Torvalds size = len; 14651da177e4SLinus Torvalds if (size % map_bankwidth(map)) 14661da177e4SLinus Torvalds size -= size % map_bankwidth(map); 14671da177e4SLinus Torvalds 14681da177e4SLinus Torvalds ret = do_write_buffer(map, &cfi->chips[chipnum], 14691da177e4SLinus Torvalds ofs, buf, size); 14701da177e4SLinus Torvalds if (ret) 14711da177e4SLinus Torvalds return ret; 14721da177e4SLinus Torvalds 14731da177e4SLinus Torvalds ofs += size; 14741da177e4SLinus Torvalds buf += size; 14751da177e4SLinus Torvalds (*retlen) += size; 14761da177e4SLinus Torvalds len -= size; 14771da177e4SLinus Torvalds 14781da177e4SLinus Torvalds if (ofs >> cfi->chipshift) { 14791da177e4SLinus Torvalds chipnum ++; 14801da177e4SLinus Torvalds ofs = 0; 14811da177e4SLinus Torvalds if (chipnum == cfi->numchips) 14821da177e4SLinus Torvalds return 0; 14831da177e4SLinus Torvalds } 14841da177e4SLinus Torvalds } 14851da177e4SLinus Torvalds 14861da177e4SLinus Torvalds if (len) { 14871da177e4SLinus Torvalds size_t retlen_dregs = 0; 14881da177e4SLinus Torvalds 14891da177e4SLinus Torvalds ret = cfi_amdstd_write_words(mtd, ofs + (chipnum<<cfi->chipshift), 14901da177e4SLinus Torvalds len, &retlen_dregs, buf); 14911da177e4SLinus Torvalds 14921da177e4SLinus Torvalds *retlen += retlen_dregs; 14931da177e4SLinus Torvalds return ret; 14941da177e4SLinus Torvalds } 14951da177e4SLinus Torvalds 14961da177e4SLinus Torvalds return 0; 14971da177e4SLinus Torvalds } 14981da177e4SLinus Torvalds 14991da177e4SLinus Torvalds 15001da177e4SLinus Torvalds /* 15011da177e4SLinus Torvalds * Handle devices with one erase region, that only implement 15021da177e4SLinus Torvalds * the chip erase command. 15031da177e4SLinus Torvalds */ 150402b15e34STodd Poynor static int __xipram do_erase_chip(struct map_info *map, struct flchip *chip) 15051da177e4SLinus Torvalds { 15061da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 15071da177e4SLinus Torvalds unsigned long timeo = jiffies + HZ; 15081da177e4SLinus Torvalds unsigned long int adr; 15091da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 15101da177e4SLinus Torvalds int ret = 0; 15111da177e4SLinus Torvalds 15121da177e4SLinus Torvalds adr = cfi->addr_unlock1; 15131da177e4SLinus Torvalds 151402b15e34STodd Poynor spin_lock(chip->mutex); 15151da177e4SLinus Torvalds ret = get_chip(map, chip, adr, FL_WRITING); 15161da177e4SLinus Torvalds if (ret) { 151702b15e34STodd Poynor spin_unlock(chip->mutex); 15181da177e4SLinus Torvalds return ret; 15191da177e4SLinus Torvalds } 15201da177e4SLinus Torvalds 15211da177e4SLinus Torvalds DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): ERASE 0x%.8lx\n", 15221da177e4SLinus Torvalds __func__, chip->start ); 15231da177e4SLinus Torvalds 152402b15e34STodd Poynor XIP_INVAL_CACHED_RANGE(map, adr, map->size); 15251da177e4SLinus Torvalds ENABLE_VPP(map); 152602b15e34STodd Poynor xip_disable(map, chip, adr); 152702b15e34STodd Poynor 15281da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 15291da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 15301da177e4SLinus Torvalds cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 15311da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 15321da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 15331da177e4SLinus Torvalds cfi_send_gen_cmd(0x10, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 15341da177e4SLinus Torvalds 15351da177e4SLinus Torvalds chip->state = FL_ERASING; 15361da177e4SLinus Torvalds chip->erase_suspended = 0; 15371da177e4SLinus Torvalds chip->in_progress_block_addr = adr; 15381da177e4SLinus Torvalds 153902b15e34STodd Poynor INVALIDATE_CACHE_UDELAY(map, chip, 154002b15e34STodd Poynor adr, map->size, 154102b15e34STodd Poynor chip->erase_time*500); 15421da177e4SLinus Torvalds 15431da177e4SLinus Torvalds timeo = jiffies + (HZ*20); 15441da177e4SLinus Torvalds 15451da177e4SLinus Torvalds for (;;) { 15461da177e4SLinus Torvalds if (chip->state != FL_ERASING) { 15471da177e4SLinus Torvalds /* Someone's suspended the erase. Sleep */ 15481da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 15491da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 155002b15e34STodd Poynor spin_unlock(chip->mutex); 15511da177e4SLinus Torvalds schedule(); 15521da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 155302b15e34STodd Poynor spin_lock(chip->mutex); 15541da177e4SLinus Torvalds continue; 15551da177e4SLinus Torvalds } 15561da177e4SLinus Torvalds if (chip->erase_suspended) { 15571da177e4SLinus Torvalds /* This erase was suspended and resumed. 15581da177e4SLinus Torvalds Adjust the timeout */ 15591da177e4SLinus Torvalds timeo = jiffies + (HZ*20); /* FIXME */ 15601da177e4SLinus Torvalds chip->erase_suspended = 0; 15611da177e4SLinus Torvalds } 15621da177e4SLinus Torvalds 15631da177e4SLinus Torvalds if (chip_ready(map, adr)) 15641da177e4SLinus Torvalds break; 15651da177e4SLinus Torvalds 1566fb4a90bfSEric W. Biedermann if (time_after(jiffies, timeo)) { 1567fb4a90bfSEric W. Biedermann printk(KERN_WARNING "MTD %s(): software timeout\n", 1568fb4a90bfSEric W. Biedermann __func__ ); 1569fb4a90bfSEric W. Biedermann break; 1570fb4a90bfSEric W. Biedermann } 1571fb4a90bfSEric W. Biedermann 15721da177e4SLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 157302b15e34STodd Poynor UDELAY(map, chip, adr, 1000000/HZ); 15741da177e4SLinus Torvalds } 1575fb4a90bfSEric W. Biedermann /* Did we succeed? */ 1576fb4a90bfSEric W. Biedermann if (!chip_good(map, adr, map_word_ff(map))) { 15771da177e4SLinus Torvalds /* reset on all failures. */ 15781da177e4SLinus Torvalds map_write( map, CMD(0xF0), chip->start ); 15791da177e4SLinus Torvalds /* FIXME - should have reset delay before continuing */ 15801da177e4SLinus Torvalds 15811da177e4SLinus Torvalds ret = -EIO; 1582fb4a90bfSEric W. Biedermann } 1583fb4a90bfSEric W. Biedermann 15841da177e4SLinus Torvalds chip->state = FL_READY; 158502b15e34STodd Poynor xip_enable(map, chip, adr); 15861da177e4SLinus Torvalds put_chip(map, chip, adr); 158702b15e34STodd Poynor spin_unlock(chip->mutex); 15881da177e4SLinus Torvalds 15891da177e4SLinus Torvalds return ret; 15901da177e4SLinus Torvalds } 15911da177e4SLinus Torvalds 15921da177e4SLinus Torvalds 159302b15e34STodd Poynor static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr, int len, void *thunk) 15941da177e4SLinus Torvalds { 15951da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 15961da177e4SLinus Torvalds unsigned long timeo = jiffies + HZ; 15971da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 15981da177e4SLinus Torvalds int ret = 0; 15991da177e4SLinus Torvalds 16001da177e4SLinus Torvalds adr += chip->start; 16011da177e4SLinus Torvalds 160202b15e34STodd Poynor spin_lock(chip->mutex); 16031da177e4SLinus Torvalds ret = get_chip(map, chip, adr, FL_ERASING); 16041da177e4SLinus Torvalds if (ret) { 160502b15e34STodd Poynor spin_unlock(chip->mutex); 16061da177e4SLinus Torvalds return ret; 16071da177e4SLinus Torvalds } 16081da177e4SLinus Torvalds 16091da177e4SLinus Torvalds DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): ERASE 0x%.8lx\n", 16101da177e4SLinus Torvalds __func__, adr ); 16111da177e4SLinus Torvalds 161202b15e34STodd Poynor XIP_INVAL_CACHED_RANGE(map, adr, len); 16131da177e4SLinus Torvalds ENABLE_VPP(map); 161402b15e34STodd Poynor xip_disable(map, chip, adr); 161502b15e34STodd Poynor 16161da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 16171da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 16181da177e4SLinus Torvalds cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 16191da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 16201da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 16211da177e4SLinus Torvalds map_write(map, CMD(0x30), adr); 16221da177e4SLinus Torvalds 16231da177e4SLinus Torvalds chip->state = FL_ERASING; 16241da177e4SLinus Torvalds chip->erase_suspended = 0; 16251da177e4SLinus Torvalds chip->in_progress_block_addr = adr; 16261da177e4SLinus Torvalds 162702b15e34STodd Poynor INVALIDATE_CACHE_UDELAY(map, chip, 162802b15e34STodd Poynor adr, len, 162902b15e34STodd Poynor chip->erase_time*500); 16301da177e4SLinus Torvalds 16311da177e4SLinus Torvalds timeo = jiffies + (HZ*20); 16321da177e4SLinus Torvalds 16331da177e4SLinus Torvalds for (;;) { 16341da177e4SLinus Torvalds if (chip->state != FL_ERASING) { 16351da177e4SLinus Torvalds /* Someone's suspended the erase. Sleep */ 16361da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 16371da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 163802b15e34STodd Poynor spin_unlock(chip->mutex); 16391da177e4SLinus Torvalds schedule(); 16401da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 164102b15e34STodd Poynor spin_lock(chip->mutex); 16421da177e4SLinus Torvalds continue; 16431da177e4SLinus Torvalds } 16441da177e4SLinus Torvalds if (chip->erase_suspended) { 16451da177e4SLinus Torvalds /* This erase was suspended and resumed. 16461da177e4SLinus Torvalds Adjust the timeout */ 16471da177e4SLinus Torvalds timeo = jiffies + (HZ*20); /* FIXME */ 16481da177e4SLinus Torvalds chip->erase_suspended = 0; 16491da177e4SLinus Torvalds } 16501da177e4SLinus Torvalds 165102b15e34STodd Poynor if (chip_ready(map, adr)) { 165202b15e34STodd Poynor xip_enable(map, chip, adr); 16531da177e4SLinus Torvalds break; 165402b15e34STodd Poynor } 16551da177e4SLinus Torvalds 1656fb4a90bfSEric W. Biedermann if (time_after(jiffies, timeo)) { 165702b15e34STodd Poynor xip_enable(map, chip, adr); 1658fb4a90bfSEric W. Biedermann printk(KERN_WARNING "MTD %s(): software timeout\n", 1659fb4a90bfSEric W. Biedermann __func__ ); 1660fb4a90bfSEric W. Biedermann break; 1661fb4a90bfSEric W. Biedermann } 1662fb4a90bfSEric W. Biedermann 16631da177e4SLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 166402b15e34STodd Poynor UDELAY(map, chip, adr, 1000000/HZ); 16651da177e4SLinus Torvalds } 1666fb4a90bfSEric W. Biedermann /* Did we succeed? */ 166722fd9a87SThomas Gleixner if (!chip_good(map, adr, map_word_ff(map))) { 16681da177e4SLinus Torvalds /* reset on all failures. */ 16691da177e4SLinus Torvalds map_write( map, CMD(0xF0), chip->start ); 16701da177e4SLinus Torvalds /* FIXME - should have reset delay before continuing */ 16711da177e4SLinus Torvalds 16721da177e4SLinus Torvalds ret = -EIO; 1673fb4a90bfSEric W. Biedermann } 1674fb4a90bfSEric W. Biedermann 16751da177e4SLinus Torvalds chip->state = FL_READY; 16761da177e4SLinus Torvalds put_chip(map, chip, adr); 167702b15e34STodd Poynor spin_unlock(chip->mutex); 16781da177e4SLinus Torvalds return ret; 16791da177e4SLinus Torvalds } 16801da177e4SLinus Torvalds 16811da177e4SLinus Torvalds 1682ce0f33adSBen Dooks static int cfi_amdstd_erase_varsize(struct mtd_info *mtd, struct erase_info *instr) 16831da177e4SLinus Torvalds { 16841da177e4SLinus Torvalds unsigned long ofs, len; 16851da177e4SLinus Torvalds int ret; 16861da177e4SLinus Torvalds 16871da177e4SLinus Torvalds ofs = instr->addr; 16881da177e4SLinus Torvalds len = instr->len; 16891da177e4SLinus Torvalds 16901da177e4SLinus Torvalds ret = cfi_varsize_frob(mtd, do_erase_oneblock, ofs, len, NULL); 16911da177e4SLinus Torvalds if (ret) 16921da177e4SLinus Torvalds return ret; 16931da177e4SLinus Torvalds 16941da177e4SLinus Torvalds instr->state = MTD_ERASE_DONE; 16951da177e4SLinus Torvalds mtd_erase_callback(instr); 16961da177e4SLinus Torvalds 16971da177e4SLinus Torvalds return 0; 16981da177e4SLinus Torvalds } 16991da177e4SLinus Torvalds 17001da177e4SLinus Torvalds 17011da177e4SLinus Torvalds static int cfi_amdstd_erase_chip(struct mtd_info *mtd, struct erase_info *instr) 17021da177e4SLinus Torvalds { 17031da177e4SLinus Torvalds struct map_info *map = mtd->priv; 17041da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 17051da177e4SLinus Torvalds int ret = 0; 17061da177e4SLinus Torvalds 17071da177e4SLinus Torvalds if (instr->addr != 0) 17081da177e4SLinus Torvalds return -EINVAL; 17091da177e4SLinus Torvalds 17101da177e4SLinus Torvalds if (instr->len != mtd->size) 17111da177e4SLinus Torvalds return -EINVAL; 17121da177e4SLinus Torvalds 17131da177e4SLinus Torvalds ret = do_erase_chip(map, &cfi->chips[0]); 17141da177e4SLinus Torvalds if (ret) 17151da177e4SLinus Torvalds return ret; 17161da177e4SLinus Torvalds 17171da177e4SLinus Torvalds instr->state = MTD_ERASE_DONE; 17181da177e4SLinus Torvalds mtd_erase_callback(instr); 17191da177e4SLinus Torvalds 17201da177e4SLinus Torvalds return 0; 17211da177e4SLinus Torvalds } 17221da177e4SLinus Torvalds 17230165508cSHaavard Skinnemoen static int do_atmel_lock(struct map_info *map, struct flchip *chip, 17240165508cSHaavard Skinnemoen unsigned long adr, int len, void *thunk) 17250165508cSHaavard Skinnemoen { 17260165508cSHaavard Skinnemoen struct cfi_private *cfi = map->fldrv_priv; 17270165508cSHaavard Skinnemoen int ret; 17280165508cSHaavard Skinnemoen 17290165508cSHaavard Skinnemoen spin_lock(chip->mutex); 17300165508cSHaavard Skinnemoen ret = get_chip(map, chip, adr + chip->start, FL_LOCKING); 17310165508cSHaavard Skinnemoen if (ret) 17320165508cSHaavard Skinnemoen goto out_unlock; 17330165508cSHaavard Skinnemoen chip->state = FL_LOCKING; 17340165508cSHaavard Skinnemoen 17350165508cSHaavard Skinnemoen DEBUG(MTD_DEBUG_LEVEL3, "MTD %s(): LOCK 0x%08lx len %d\n", 17360165508cSHaavard Skinnemoen __func__, adr, len); 17370165508cSHaavard Skinnemoen 17380165508cSHaavard Skinnemoen cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, 17390165508cSHaavard Skinnemoen cfi->device_type, NULL); 17400165508cSHaavard Skinnemoen cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, 17410165508cSHaavard Skinnemoen cfi->device_type, NULL); 17420165508cSHaavard Skinnemoen cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, 17430165508cSHaavard Skinnemoen cfi->device_type, NULL); 17440165508cSHaavard Skinnemoen cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, 17450165508cSHaavard Skinnemoen cfi->device_type, NULL); 17460165508cSHaavard Skinnemoen cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, 17470165508cSHaavard Skinnemoen cfi->device_type, NULL); 17480165508cSHaavard Skinnemoen map_write(map, CMD(0x40), chip->start + adr); 17490165508cSHaavard Skinnemoen 17500165508cSHaavard Skinnemoen chip->state = FL_READY; 17510165508cSHaavard Skinnemoen put_chip(map, chip, adr + chip->start); 17520165508cSHaavard Skinnemoen ret = 0; 17530165508cSHaavard Skinnemoen 17540165508cSHaavard Skinnemoen out_unlock: 17550165508cSHaavard Skinnemoen spin_unlock(chip->mutex); 17560165508cSHaavard Skinnemoen return ret; 17570165508cSHaavard Skinnemoen } 17580165508cSHaavard Skinnemoen 17590165508cSHaavard Skinnemoen static int do_atmel_unlock(struct map_info *map, struct flchip *chip, 17600165508cSHaavard Skinnemoen unsigned long adr, int len, void *thunk) 17610165508cSHaavard Skinnemoen { 17620165508cSHaavard Skinnemoen struct cfi_private *cfi = map->fldrv_priv; 17630165508cSHaavard Skinnemoen int ret; 17640165508cSHaavard Skinnemoen 17650165508cSHaavard Skinnemoen spin_lock(chip->mutex); 17660165508cSHaavard Skinnemoen ret = get_chip(map, chip, adr + chip->start, FL_UNLOCKING); 17670165508cSHaavard Skinnemoen if (ret) 17680165508cSHaavard Skinnemoen goto out_unlock; 17690165508cSHaavard Skinnemoen chip->state = FL_UNLOCKING; 17700165508cSHaavard Skinnemoen 17710165508cSHaavard Skinnemoen DEBUG(MTD_DEBUG_LEVEL3, "MTD %s(): LOCK 0x%08lx len %d\n", 17720165508cSHaavard Skinnemoen __func__, adr, len); 17730165508cSHaavard Skinnemoen 17740165508cSHaavard Skinnemoen cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, 17750165508cSHaavard Skinnemoen cfi->device_type, NULL); 17760165508cSHaavard Skinnemoen map_write(map, CMD(0x70), adr); 17770165508cSHaavard Skinnemoen 17780165508cSHaavard Skinnemoen chip->state = FL_READY; 17790165508cSHaavard Skinnemoen put_chip(map, chip, adr + chip->start); 17800165508cSHaavard Skinnemoen ret = 0; 17810165508cSHaavard Skinnemoen 17820165508cSHaavard Skinnemoen out_unlock: 17830165508cSHaavard Skinnemoen spin_unlock(chip->mutex); 17840165508cSHaavard Skinnemoen return ret; 17850165508cSHaavard Skinnemoen } 17860165508cSHaavard Skinnemoen 178769423d99SAdrian Hunter static int cfi_atmel_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) 17880165508cSHaavard Skinnemoen { 17890165508cSHaavard Skinnemoen return cfi_varsize_frob(mtd, do_atmel_lock, ofs, len, NULL); 17900165508cSHaavard Skinnemoen } 17910165508cSHaavard Skinnemoen 179269423d99SAdrian Hunter static int cfi_atmel_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) 17930165508cSHaavard Skinnemoen { 17940165508cSHaavard Skinnemoen return cfi_varsize_frob(mtd, do_atmel_unlock, ofs, len, NULL); 17950165508cSHaavard Skinnemoen } 17960165508cSHaavard Skinnemoen 17971da177e4SLinus Torvalds 17981da177e4SLinus Torvalds static void cfi_amdstd_sync (struct mtd_info *mtd) 17991da177e4SLinus Torvalds { 18001da177e4SLinus Torvalds struct map_info *map = mtd->priv; 18011da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 18021da177e4SLinus Torvalds int i; 18031da177e4SLinus Torvalds struct flchip *chip; 18041da177e4SLinus Torvalds int ret = 0; 18051da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 18061da177e4SLinus Torvalds 18071da177e4SLinus Torvalds for (i=0; !ret && i<cfi->numchips; i++) { 18081da177e4SLinus Torvalds chip = &cfi->chips[i]; 18091da177e4SLinus Torvalds 18101da177e4SLinus Torvalds retry: 181102b15e34STodd Poynor spin_lock(chip->mutex); 18121da177e4SLinus Torvalds 18131da177e4SLinus Torvalds switch(chip->state) { 18141da177e4SLinus Torvalds case FL_READY: 18151da177e4SLinus Torvalds case FL_STATUS: 18161da177e4SLinus Torvalds case FL_CFI_QUERY: 18171da177e4SLinus Torvalds case FL_JEDEC_QUERY: 18181da177e4SLinus Torvalds chip->oldstate = chip->state; 18191da177e4SLinus Torvalds chip->state = FL_SYNCING; 18201da177e4SLinus Torvalds /* No need to wake_up() on this state change - 18211da177e4SLinus Torvalds * as the whole point is that nobody can do anything 18221da177e4SLinus Torvalds * with the chip now anyway. 18231da177e4SLinus Torvalds */ 18241da177e4SLinus Torvalds case FL_SYNCING: 182502b15e34STodd Poynor spin_unlock(chip->mutex); 18261da177e4SLinus Torvalds break; 18271da177e4SLinus Torvalds 18281da177e4SLinus Torvalds default: 18291da177e4SLinus Torvalds /* Not an idle state */ 1830f8e30e44SDmitry Adamushko set_current_state(TASK_UNINTERRUPTIBLE); 18311da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 18321da177e4SLinus Torvalds 183302b15e34STodd Poynor spin_unlock(chip->mutex); 18341da177e4SLinus Torvalds 18351da177e4SLinus Torvalds schedule(); 18361da177e4SLinus Torvalds 18371da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 18381da177e4SLinus Torvalds 18391da177e4SLinus Torvalds goto retry; 18401da177e4SLinus Torvalds } 18411da177e4SLinus Torvalds } 18421da177e4SLinus Torvalds 18431da177e4SLinus Torvalds /* Unlock the chips again */ 18441da177e4SLinus Torvalds 18451da177e4SLinus Torvalds for (i--; i >=0; i--) { 18461da177e4SLinus Torvalds chip = &cfi->chips[i]; 18471da177e4SLinus Torvalds 184802b15e34STodd Poynor spin_lock(chip->mutex); 18491da177e4SLinus Torvalds 18501da177e4SLinus Torvalds if (chip->state == FL_SYNCING) { 18511da177e4SLinus Torvalds chip->state = chip->oldstate; 18521da177e4SLinus Torvalds wake_up(&chip->wq); 18531da177e4SLinus Torvalds } 185402b15e34STodd Poynor spin_unlock(chip->mutex); 18551da177e4SLinus Torvalds } 18561da177e4SLinus Torvalds } 18571da177e4SLinus Torvalds 18581da177e4SLinus Torvalds 18591da177e4SLinus Torvalds static int cfi_amdstd_suspend(struct mtd_info *mtd) 18601da177e4SLinus Torvalds { 18611da177e4SLinus Torvalds struct map_info *map = mtd->priv; 18621da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 18631da177e4SLinus Torvalds int i; 18641da177e4SLinus Torvalds struct flchip *chip; 18651da177e4SLinus Torvalds int ret = 0; 18661da177e4SLinus Torvalds 18671da177e4SLinus Torvalds for (i=0; !ret && i<cfi->numchips; i++) { 18681da177e4SLinus Torvalds chip = &cfi->chips[i]; 18691da177e4SLinus Torvalds 187002b15e34STodd Poynor spin_lock(chip->mutex); 18711da177e4SLinus Torvalds 18721da177e4SLinus Torvalds switch(chip->state) { 18731da177e4SLinus Torvalds case FL_READY: 18741da177e4SLinus Torvalds case FL_STATUS: 18751da177e4SLinus Torvalds case FL_CFI_QUERY: 18761da177e4SLinus Torvalds case FL_JEDEC_QUERY: 18771da177e4SLinus Torvalds chip->oldstate = chip->state; 18781da177e4SLinus Torvalds chip->state = FL_PM_SUSPENDED; 18791da177e4SLinus Torvalds /* No need to wake_up() on this state change - 18801da177e4SLinus Torvalds * as the whole point is that nobody can do anything 18811da177e4SLinus Torvalds * with the chip now anyway. 18821da177e4SLinus Torvalds */ 18831da177e4SLinus Torvalds case FL_PM_SUSPENDED: 18841da177e4SLinus Torvalds break; 18851da177e4SLinus Torvalds 18861da177e4SLinus Torvalds default: 18871da177e4SLinus Torvalds ret = -EAGAIN; 18881da177e4SLinus Torvalds break; 18891da177e4SLinus Torvalds } 189002b15e34STodd Poynor spin_unlock(chip->mutex); 18911da177e4SLinus Torvalds } 18921da177e4SLinus Torvalds 18931da177e4SLinus Torvalds /* Unlock the chips again */ 18941da177e4SLinus Torvalds 18951da177e4SLinus Torvalds if (ret) { 18961da177e4SLinus Torvalds for (i--; i >=0; i--) { 18971da177e4SLinus Torvalds chip = &cfi->chips[i]; 18981da177e4SLinus Torvalds 189902b15e34STodd Poynor spin_lock(chip->mutex); 19001da177e4SLinus Torvalds 19011da177e4SLinus Torvalds if (chip->state == FL_PM_SUSPENDED) { 19021da177e4SLinus Torvalds chip->state = chip->oldstate; 19031da177e4SLinus Torvalds wake_up(&chip->wq); 19041da177e4SLinus Torvalds } 190502b15e34STodd Poynor spin_unlock(chip->mutex); 19061da177e4SLinus Torvalds } 19071da177e4SLinus Torvalds } 19081da177e4SLinus Torvalds 19091da177e4SLinus Torvalds return ret; 19101da177e4SLinus Torvalds } 19111da177e4SLinus Torvalds 19121da177e4SLinus Torvalds 19131da177e4SLinus Torvalds static void cfi_amdstd_resume(struct mtd_info *mtd) 19141da177e4SLinus Torvalds { 19151da177e4SLinus Torvalds struct map_info *map = mtd->priv; 19161da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 19171da177e4SLinus Torvalds int i; 19181da177e4SLinus Torvalds struct flchip *chip; 19191da177e4SLinus Torvalds 19201da177e4SLinus Torvalds for (i=0; i<cfi->numchips; i++) { 19211da177e4SLinus Torvalds 19221da177e4SLinus Torvalds chip = &cfi->chips[i]; 19231da177e4SLinus Torvalds 192402b15e34STodd Poynor spin_lock(chip->mutex); 19251da177e4SLinus Torvalds 19261da177e4SLinus Torvalds if (chip->state == FL_PM_SUSPENDED) { 19271da177e4SLinus Torvalds chip->state = FL_READY; 19281da177e4SLinus Torvalds map_write(map, CMD(0xF0), chip->start); 19291da177e4SLinus Torvalds wake_up(&chip->wq); 19301da177e4SLinus Torvalds } 19311da177e4SLinus Torvalds else 19321da177e4SLinus Torvalds printk(KERN_ERR "Argh. Chip not in PM_SUSPENDED state upon resume()\n"); 19331da177e4SLinus Torvalds 193402b15e34STodd Poynor spin_unlock(chip->mutex); 19351da177e4SLinus Torvalds } 19361da177e4SLinus Torvalds } 19371da177e4SLinus Torvalds 19381da177e4SLinus Torvalds static void cfi_amdstd_destroy(struct mtd_info *mtd) 19391da177e4SLinus Torvalds { 19401da177e4SLinus Torvalds struct map_info *map = mtd->priv; 19411da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 1942fa671646SJesper Juhl 19431da177e4SLinus Torvalds kfree(cfi->cmdset_priv); 19441da177e4SLinus Torvalds kfree(cfi->cfiq); 19451da177e4SLinus Torvalds kfree(cfi); 19461da177e4SLinus Torvalds kfree(mtd->eraseregions); 19471da177e4SLinus Torvalds } 19481da177e4SLinus Torvalds 19491da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 19501da177e4SLinus Torvalds MODULE_AUTHOR("Crossnet Co. <info@crossnet.co.jp> et al."); 19511da177e4SLinus Torvalds MODULE_DESCRIPTION("MTD chip driver for AMD/Fujitsu flash chips"); 1952