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 * 161da177e4SLinus Torvalds * Occasionally maintained by Thayne Harbaugh tharbaugh at lnxi dot com 171da177e4SLinus Torvalds * 181da177e4SLinus Torvalds * This code is GPL 191da177e4SLinus Torvalds * 201f948b43SThomas Gleixner * $Id: cfi_cmdset_0002.c,v 1.122 2005/11/07 11:14:22 gleixner Exp $ 211da177e4SLinus Torvalds * 221da177e4SLinus Torvalds */ 231da177e4SLinus Torvalds 241da177e4SLinus Torvalds #include <linux/module.h> 251da177e4SLinus Torvalds #include <linux/types.h> 261da177e4SLinus Torvalds #include <linux/kernel.h> 271da177e4SLinus Torvalds #include <linux/sched.h> 281da177e4SLinus Torvalds #include <linux/init.h> 291da177e4SLinus Torvalds #include <asm/io.h> 301da177e4SLinus Torvalds #include <asm/byteorder.h> 311da177e4SLinus Torvalds 321da177e4SLinus Torvalds #include <linux/errno.h> 331da177e4SLinus Torvalds #include <linux/slab.h> 341da177e4SLinus Torvalds #include <linux/delay.h> 351da177e4SLinus Torvalds #include <linux/interrupt.h> 361da177e4SLinus Torvalds #include <linux/mtd/compatmac.h> 371da177e4SLinus Torvalds #include <linux/mtd/map.h> 381da177e4SLinus Torvalds #include <linux/mtd/mtd.h> 391da177e4SLinus Torvalds #include <linux/mtd/cfi.h> 4002b15e34STodd Poynor #include <linux/mtd/xip.h> 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds #define AMD_BOOTLOC_BUG 431da177e4SLinus Torvalds #define FORCE_WORD_WRITE 0 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds #define MAX_WORD_RETRIES 3 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds #define MANUFACTURER_AMD 0x0001 480165508cSHaavard Skinnemoen #define MANUFACTURER_ATMEL 0x001F 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 740165508cSHaavard Skinnemoen static int cfi_atmel_lock(struct mtd_info *mtd, loff_t ofs, size_t len); 750165508cSHaavard Skinnemoen static int cfi_atmel_unlock(struct mtd_info *mtd, loff_t ofs, size_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 */ 1501da177e4SLinus Torvalds if (cfi->id & 0x80) { 1511da177e4SLinus Torvalds printk(KERN_WARNING "%s: JEDEC Device ID is 0x%02X. Assuming broken CFI table.\n", map->name, cfi->id); 1521da177e4SLinus Torvalds extp->TopBottom = 3; /* top boot */ 1531da177e4SLinus Torvalds } else { 1541da177e4SLinus Torvalds extp->TopBottom = 2; /* bottom boot */ 1551da177e4SLinus Torvalds } 1561da177e4SLinus Torvalds } 1571da177e4SLinus Torvalds } 1581da177e4SLinus Torvalds #endif 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds static void fixup_use_write_buffers(struct mtd_info *mtd, void *param) 1611da177e4SLinus Torvalds { 1621da177e4SLinus Torvalds struct map_info *map = mtd->priv; 1631da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 1641da177e4SLinus Torvalds if (cfi->cfiq->BufWriteTimeoutTyp) { 1651da177e4SLinus Torvalds DEBUG(MTD_DEBUG_LEVEL1, "Using buffer write method\n" ); 1661da177e4SLinus Torvalds mtd->write = cfi_amdstd_write_buffers; 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds } 1691da177e4SLinus Torvalds 1705b0c5c2cSHaavard Skinnemoen /* Atmel chips don't use the same PRI format as AMD chips */ 1715b0c5c2cSHaavard Skinnemoen static void fixup_convert_atmel_pri(struct mtd_info *mtd, void *param) 1725b0c5c2cSHaavard Skinnemoen { 1735b0c5c2cSHaavard Skinnemoen struct map_info *map = mtd->priv; 1745b0c5c2cSHaavard Skinnemoen struct cfi_private *cfi = map->fldrv_priv; 1755b0c5c2cSHaavard Skinnemoen struct cfi_pri_amdstd *extp = cfi->cmdset_priv; 1765b0c5c2cSHaavard Skinnemoen struct cfi_pri_atmel atmel_pri; 1775b0c5c2cSHaavard Skinnemoen 1785b0c5c2cSHaavard Skinnemoen memcpy(&atmel_pri, extp, sizeof(atmel_pri)); 179de591dacSHåvard Skinnemoen memset((char *)extp + 5, 0, sizeof(*extp) - 5); 1805b0c5c2cSHaavard Skinnemoen 1815b0c5c2cSHaavard Skinnemoen if (atmel_pri.Features & 0x02) 1825b0c5c2cSHaavard Skinnemoen extp->EraseSuspend = 2; 1835b0c5c2cSHaavard Skinnemoen 1845b0c5c2cSHaavard Skinnemoen if (atmel_pri.BottomBoot) 1855b0c5c2cSHaavard Skinnemoen extp->TopBottom = 2; 1865b0c5c2cSHaavard Skinnemoen else 1875b0c5c2cSHaavard Skinnemoen extp->TopBottom = 3; 1885b0c5c2cSHaavard Skinnemoen } 1895b0c5c2cSHaavard Skinnemoen 1901da177e4SLinus Torvalds static void fixup_use_secsi(struct mtd_info *mtd, void *param) 1911da177e4SLinus Torvalds { 1921da177e4SLinus Torvalds /* Setup for chips with a secsi area */ 1931da177e4SLinus Torvalds mtd->read_user_prot_reg = cfi_amdstd_secsi_read; 1941da177e4SLinus Torvalds mtd->read_fact_prot_reg = cfi_amdstd_secsi_read; 1951da177e4SLinus Torvalds } 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds static void fixup_use_erase_chip(struct mtd_info *mtd, void *param) 1981da177e4SLinus Torvalds { 1991da177e4SLinus Torvalds struct map_info *map = mtd->priv; 2001da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 2011da177e4SLinus Torvalds if ((cfi->cfiq->NumEraseRegions == 1) && 2021da177e4SLinus Torvalds ((cfi->cfiq->EraseRegionInfo[0] & 0xffff) == 0)) { 2031da177e4SLinus Torvalds mtd->erase = cfi_amdstd_erase_chip; 2041da177e4SLinus Torvalds } 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds } 2071da177e4SLinus Torvalds 2080165508cSHaavard Skinnemoen /* 2090165508cSHaavard Skinnemoen * Some Atmel chips (e.g. the AT49BV6416) power-up with all sectors 2100165508cSHaavard Skinnemoen * locked by default. 2110165508cSHaavard Skinnemoen */ 2120165508cSHaavard Skinnemoen static void fixup_use_atmel_lock(struct mtd_info *mtd, void *param) 2130165508cSHaavard Skinnemoen { 2140165508cSHaavard Skinnemoen mtd->lock = cfi_atmel_lock; 2150165508cSHaavard Skinnemoen mtd->unlock = cfi_atmel_unlock; 216187ef152SHåvard Skinnemoen mtd->flags |= MTD_STUPID_LOCK; 2170165508cSHaavard Skinnemoen } 2180165508cSHaavard Skinnemoen 2191da177e4SLinus Torvalds static struct cfi_fixup cfi_fixup_table[] = { 2201da177e4SLinus Torvalds #ifdef AMD_BOOTLOC_BUG 2211da177e4SLinus Torvalds { CFI_MFR_AMD, CFI_ID_ANY, fixup_amd_bootblock, NULL }, 2221da177e4SLinus Torvalds #endif 2231da177e4SLinus Torvalds { CFI_MFR_AMD, 0x0050, fixup_use_secsi, NULL, }, 2241da177e4SLinus Torvalds { CFI_MFR_AMD, 0x0053, fixup_use_secsi, NULL, }, 2251da177e4SLinus Torvalds { CFI_MFR_AMD, 0x0055, fixup_use_secsi, NULL, }, 2261da177e4SLinus Torvalds { CFI_MFR_AMD, 0x0056, fixup_use_secsi, NULL, }, 2271da177e4SLinus Torvalds { CFI_MFR_AMD, 0x005C, fixup_use_secsi, NULL, }, 2281da177e4SLinus Torvalds { CFI_MFR_AMD, 0x005F, fixup_use_secsi, NULL, }, 2291da177e4SLinus Torvalds #if !FORCE_WORD_WRITE 2301da177e4SLinus Torvalds { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL, }, 2311da177e4SLinus Torvalds #endif 2325b0c5c2cSHaavard Skinnemoen { CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri, NULL }, 2331da177e4SLinus Torvalds { 0, 0, NULL, NULL } 2341da177e4SLinus Torvalds }; 2351da177e4SLinus Torvalds static struct cfi_fixup jedec_fixup_table[] = { 2361da177e4SLinus Torvalds { MANUFACTURER_SST, SST49LF004B, fixup_use_fwh_lock, NULL, }, 23789072ef9SRyan Jackson { MANUFACTURER_SST, SST49LF040B, fixup_use_fwh_lock, NULL, }, 238fb4a90bfSEric W. Biedermann { MANUFACTURER_SST, SST49LF008A, fixup_use_fwh_lock, NULL, }, 2391da177e4SLinus Torvalds { 0, 0, NULL, NULL } 2401da177e4SLinus Torvalds }; 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds static struct cfi_fixup fixup_table[] = { 2431da177e4SLinus Torvalds /* The CFI vendor ids and the JEDEC vendor IDs appear 2441da177e4SLinus Torvalds * to be common. It is like the devices id's are as 2451da177e4SLinus Torvalds * well. This table is to pick all cases where 2461da177e4SLinus Torvalds * we know that is the case. 2471da177e4SLinus Torvalds */ 2481da177e4SLinus Torvalds { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_erase_chip, NULL }, 2490165508cSHaavard Skinnemoen { CFI_MFR_ATMEL, AT49BV6416, fixup_use_atmel_lock, NULL }, 2501da177e4SLinus Torvalds { 0, 0, NULL, NULL } 2511da177e4SLinus Torvalds }; 2521da177e4SLinus Torvalds 2531da177e4SLinus Torvalds 2541da177e4SLinus Torvalds struct mtd_info *cfi_cmdset_0002(struct map_info *map, int primary) 2551da177e4SLinus Torvalds { 2561da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 2571da177e4SLinus Torvalds struct mtd_info *mtd; 2581da177e4SLinus Torvalds int i; 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds mtd = kmalloc(sizeof(*mtd), GFP_KERNEL); 2611da177e4SLinus Torvalds if (!mtd) { 2621da177e4SLinus Torvalds printk(KERN_WARNING "Failed to allocate memory for MTD device\n"); 2631da177e4SLinus Torvalds return NULL; 2641da177e4SLinus Torvalds } 2651da177e4SLinus Torvalds memset(mtd, 0, sizeof(*mtd)); 2661da177e4SLinus Torvalds mtd->priv = map; 2671da177e4SLinus Torvalds mtd->type = MTD_NORFLASH; 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvalds /* Fill in the default mtd operations */ 2701da177e4SLinus Torvalds mtd->erase = cfi_amdstd_erase_varsize; 2711da177e4SLinus Torvalds mtd->write = cfi_amdstd_write_words; 2721da177e4SLinus Torvalds mtd->read = cfi_amdstd_read; 2731da177e4SLinus Torvalds mtd->sync = cfi_amdstd_sync; 2741da177e4SLinus Torvalds mtd->suspend = cfi_amdstd_suspend; 2751da177e4SLinus Torvalds mtd->resume = cfi_amdstd_resume; 2761da177e4SLinus Torvalds mtd->flags = MTD_CAP_NORFLASH; 2771da177e4SLinus Torvalds mtd->name = map->name; 278783ed81fSArtem B. Bityutskiy mtd->writesize = 1; 2791da177e4SLinus Torvalds 2801da177e4SLinus Torvalds if (cfi->cfi_mode==CFI_MODE_CFI){ 2811da177e4SLinus Torvalds unsigned char bootloc; 2821da177e4SLinus Torvalds /* 2831da177e4SLinus Torvalds * It's a real CFI chip, not one for which the probe 2841da177e4SLinus Torvalds * routine faked a CFI structure. So we read the feature 2851da177e4SLinus Torvalds * table from it. 2861da177e4SLinus Torvalds */ 2871da177e4SLinus Torvalds __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR; 2881da177e4SLinus Torvalds struct cfi_pri_amdstd *extp; 2891da177e4SLinus Torvalds 2901da177e4SLinus Torvalds extp = (struct cfi_pri_amdstd*)cfi_read_pri(map, adr, sizeof(*extp), "Amd/Fujitsu"); 2911da177e4SLinus Torvalds if (!extp) { 2921da177e4SLinus Torvalds kfree(mtd); 2931da177e4SLinus Torvalds return NULL; 2941da177e4SLinus Torvalds } 2951da177e4SLinus Torvalds 296d88f977bSTodd Poynor if (extp->MajorVersion != '1' || 297d88f977bSTodd Poynor (extp->MinorVersion < '0' || extp->MinorVersion > '4')) { 298d88f977bSTodd Poynor printk(KERN_ERR " Unknown Amd/Fujitsu Extended Query " 299d88f977bSTodd Poynor "version %c.%c.\n", extp->MajorVersion, 300d88f977bSTodd Poynor extp->MinorVersion); 301d88f977bSTodd Poynor kfree(extp); 302d88f977bSTodd Poynor kfree(mtd); 303d88f977bSTodd Poynor return NULL; 304d88f977bSTodd Poynor } 305d88f977bSTodd Poynor 3061da177e4SLinus Torvalds /* Install our own private info structure */ 3071da177e4SLinus Torvalds cfi->cmdset_priv = extp; 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvalds /* Apply cfi device specific fixups */ 3101da177e4SLinus Torvalds cfi_fixup(mtd, cfi_fixup_table); 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds #ifdef DEBUG_CFI_FEATURES 3131da177e4SLinus Torvalds /* Tell the user about it in lots of lovely detail */ 3141da177e4SLinus Torvalds cfi_tell_features(extp); 3151da177e4SLinus Torvalds #endif 3161da177e4SLinus Torvalds 3171da177e4SLinus Torvalds bootloc = extp->TopBottom; 3181da177e4SLinus Torvalds if ((bootloc != 2) && (bootloc != 3)) { 3191da177e4SLinus Torvalds printk(KERN_WARNING "%s: CFI does not contain boot " 3201da177e4SLinus Torvalds "bank location. Assuming top.\n", map->name); 3211da177e4SLinus Torvalds bootloc = 2; 3221da177e4SLinus Torvalds } 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds if (bootloc == 3 && cfi->cfiq->NumEraseRegions > 1) { 3251da177e4SLinus Torvalds printk(KERN_WARNING "%s: Swapping erase regions for broken CFI table.\n", map->name); 3261da177e4SLinus Torvalds 3271da177e4SLinus Torvalds for (i=0; i<cfi->cfiq->NumEraseRegions / 2; i++) { 3281da177e4SLinus Torvalds int j = (cfi->cfiq->NumEraseRegions-1)-i; 3291da177e4SLinus Torvalds __u32 swap; 3301da177e4SLinus Torvalds 3311da177e4SLinus Torvalds swap = cfi->cfiq->EraseRegionInfo[i]; 3321da177e4SLinus Torvalds cfi->cfiq->EraseRegionInfo[i] = cfi->cfiq->EraseRegionInfo[j]; 3331da177e4SLinus Torvalds cfi->cfiq->EraseRegionInfo[j] = swap; 3341da177e4SLinus Torvalds } 3351da177e4SLinus Torvalds } 3361da177e4SLinus Torvalds /* Set the default CFI lock/unlock addresses */ 3371da177e4SLinus Torvalds cfi->addr_unlock1 = 0x555; 3381da177e4SLinus Torvalds cfi->addr_unlock2 = 0x2aa; 3391da177e4SLinus Torvalds /* Modify the unlock address if we are in compatibility mode */ 3401da177e4SLinus Torvalds if ( /* x16 in x8 mode */ 3411da177e4SLinus Torvalds ((cfi->device_type == CFI_DEVICETYPE_X8) && 3421da177e4SLinus Torvalds (cfi->cfiq->InterfaceDesc == 2)) || 3431da177e4SLinus Torvalds /* x32 in x16 mode */ 3441da177e4SLinus Torvalds ((cfi->device_type == CFI_DEVICETYPE_X16) && 3451da177e4SLinus Torvalds (cfi->cfiq->InterfaceDesc == 4))) 3461da177e4SLinus Torvalds { 3471da177e4SLinus Torvalds cfi->addr_unlock1 = 0xaaa; 3481da177e4SLinus Torvalds cfi->addr_unlock2 = 0x555; 3491da177e4SLinus Torvalds } 3501da177e4SLinus Torvalds 3511da177e4SLinus Torvalds } /* CFI mode */ 3521da177e4SLinus Torvalds else if (cfi->cfi_mode == CFI_MODE_JEDEC) { 3531da177e4SLinus Torvalds /* Apply jedec specific fixups */ 3541da177e4SLinus Torvalds cfi_fixup(mtd, jedec_fixup_table); 3551da177e4SLinus Torvalds } 3561da177e4SLinus Torvalds /* Apply generic fixups */ 3571da177e4SLinus Torvalds cfi_fixup(mtd, fixup_table); 3581da177e4SLinus Torvalds 3591da177e4SLinus Torvalds for (i=0; i< cfi->numchips; i++) { 3601da177e4SLinus Torvalds cfi->chips[i].word_write_time = 1<<cfi->cfiq->WordWriteTimeoutTyp; 3611da177e4SLinus Torvalds cfi->chips[i].buffer_write_time = 1<<cfi->cfiq->BufWriteTimeoutTyp; 3621da177e4SLinus Torvalds cfi->chips[i].erase_time = 1<<cfi->cfiq->BlockEraseTimeoutTyp; 3631da177e4SLinus Torvalds } 3641da177e4SLinus Torvalds 3651da177e4SLinus Torvalds map->fldrv = &cfi_amdstd_chipdrv; 3661da177e4SLinus Torvalds 3671da177e4SLinus Torvalds return cfi_amdstd_setup(mtd); 3681da177e4SLinus Torvalds } 36983ea4ef2SDavid Woodhouse EXPORT_SYMBOL_GPL(cfi_cmdset_0002); 3701da177e4SLinus Torvalds 3711da177e4SLinus Torvalds static struct mtd_info *cfi_amdstd_setup(struct mtd_info *mtd) 3721da177e4SLinus Torvalds { 3731da177e4SLinus Torvalds struct map_info *map = mtd->priv; 3741da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 3751da177e4SLinus Torvalds unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave; 3761da177e4SLinus Torvalds unsigned long offset = 0; 3771da177e4SLinus Torvalds int i,j; 3781da177e4SLinus Torvalds 3791da177e4SLinus Torvalds printk(KERN_NOTICE "number of %s chips: %d\n", 3801da177e4SLinus Torvalds (cfi->cfi_mode == CFI_MODE_CFI)?"CFI":"JEDEC",cfi->numchips); 3811da177e4SLinus Torvalds /* Select the correct geometry setup */ 3821da177e4SLinus Torvalds mtd->size = devsize * cfi->numchips; 3831da177e4SLinus Torvalds 3841da177e4SLinus Torvalds mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips; 3851da177e4SLinus Torvalds mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) 3861da177e4SLinus Torvalds * mtd->numeraseregions, GFP_KERNEL); 3871da177e4SLinus Torvalds if (!mtd->eraseregions) { 3881da177e4SLinus Torvalds printk(KERN_WARNING "Failed to allocate memory for MTD erase region info\n"); 3891da177e4SLinus Torvalds goto setup_err; 3901da177e4SLinus Torvalds } 3911da177e4SLinus Torvalds 3921da177e4SLinus Torvalds for (i=0; i<cfi->cfiq->NumEraseRegions; i++) { 3931da177e4SLinus Torvalds unsigned long ernum, ersize; 3941da177e4SLinus Torvalds ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave; 3951da177e4SLinus Torvalds ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1; 3961da177e4SLinus Torvalds 3971da177e4SLinus Torvalds if (mtd->erasesize < ersize) { 3981da177e4SLinus Torvalds mtd->erasesize = ersize; 3991da177e4SLinus Torvalds } 4001da177e4SLinus Torvalds for (j=0; j<cfi->numchips; j++) { 4011da177e4SLinus Torvalds mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset; 4021da177e4SLinus Torvalds mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize; 4031da177e4SLinus Torvalds mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum; 4041da177e4SLinus Torvalds } 4051da177e4SLinus Torvalds offset += (ersize * ernum); 4061da177e4SLinus Torvalds } 4071da177e4SLinus Torvalds if (offset != devsize) { 4081da177e4SLinus Torvalds /* Argh */ 4091da177e4SLinus Torvalds printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize); 4101da177e4SLinus Torvalds goto setup_err; 4111da177e4SLinus Torvalds } 4121da177e4SLinus Torvalds #if 0 4131da177e4SLinus Torvalds // debug 4141da177e4SLinus Torvalds for (i=0; i<mtd->numeraseregions;i++){ 4151da177e4SLinus Torvalds printk("%d: offset=0x%x,size=0x%x,blocks=%d\n", 4161da177e4SLinus Torvalds i,mtd->eraseregions[i].offset, 4171da177e4SLinus Torvalds mtd->eraseregions[i].erasesize, 4181da177e4SLinus Torvalds mtd->eraseregions[i].numblocks); 4191da177e4SLinus Torvalds } 4201da177e4SLinus Torvalds #endif 4211da177e4SLinus Torvalds 4221da177e4SLinus Torvalds /* FIXME: erase-suspend-program is broken. See 4231da177e4SLinus Torvalds http://lists.infradead.org/pipermail/linux-mtd/2003-December/009001.html */ 4241da177e4SLinus Torvalds printk(KERN_NOTICE "cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.\n"); 4251da177e4SLinus Torvalds 4261da177e4SLinus Torvalds __module_get(THIS_MODULE); 4271da177e4SLinus Torvalds return mtd; 4281da177e4SLinus Torvalds 4291da177e4SLinus Torvalds setup_err: 4301da177e4SLinus Torvalds if(mtd) { 4311da177e4SLinus Torvalds kfree(mtd->eraseregions); 4321da177e4SLinus Torvalds kfree(mtd); 4331da177e4SLinus Torvalds } 4341da177e4SLinus Torvalds kfree(cfi->cmdset_priv); 4351da177e4SLinus Torvalds kfree(cfi->cfiq); 4361da177e4SLinus Torvalds return NULL; 4371da177e4SLinus Torvalds } 4381da177e4SLinus Torvalds 4391da177e4SLinus Torvalds /* 4401da177e4SLinus Torvalds * Return true if the chip is ready. 4411da177e4SLinus Torvalds * 4421da177e4SLinus Torvalds * Ready is one of: read mode, query mode, erase-suspend-read mode (in any 4431da177e4SLinus Torvalds * non-suspended sector) and is indicated by no toggle bits toggling. 4441da177e4SLinus Torvalds * 4451da177e4SLinus Torvalds * Note that anything more complicated than checking if no bits are toggling 4461da177e4SLinus Torvalds * (including checking DQ5 for an error status) is tricky to get working 4471da177e4SLinus Torvalds * correctly and is therefore not done (particulary with interleaved chips 4481da177e4SLinus Torvalds * as each chip must be checked independantly of the others). 4491da177e4SLinus Torvalds */ 45002b15e34STodd Poynor static int __xipram chip_ready(struct map_info *map, unsigned long addr) 4511da177e4SLinus Torvalds { 4521da177e4SLinus Torvalds map_word d, t; 4531da177e4SLinus Torvalds 4541da177e4SLinus Torvalds d = map_read(map, addr); 4551da177e4SLinus Torvalds t = map_read(map, addr); 4561da177e4SLinus Torvalds 4571da177e4SLinus Torvalds return map_word_equal(map, d, t); 4581da177e4SLinus Torvalds } 4591da177e4SLinus Torvalds 460fb4a90bfSEric W. Biedermann /* 461fb4a90bfSEric W. Biedermann * Return true if the chip is ready and has the correct value. 462fb4a90bfSEric W. Biedermann * 463fb4a90bfSEric W. Biedermann * Ready is one of: read mode, query mode, erase-suspend-read mode (in any 464fb4a90bfSEric W. Biedermann * non-suspended sector) and it is indicated by no bits toggling. 465fb4a90bfSEric W. Biedermann * 466fb4a90bfSEric W. Biedermann * Error are indicated by toggling bits or bits held with the wrong value, 467fb4a90bfSEric W. Biedermann * or with bits toggling. 468fb4a90bfSEric W. Biedermann * 469fb4a90bfSEric W. Biedermann * Note that anything more complicated than checking if no bits are toggling 470fb4a90bfSEric W. Biedermann * (including checking DQ5 for an error status) is tricky to get working 471fb4a90bfSEric W. Biedermann * correctly and is therefore not done (particulary with interleaved chips 472fb4a90bfSEric W. Biedermann * as each chip must be checked independantly of the others). 473fb4a90bfSEric W. Biedermann * 474fb4a90bfSEric W. Biedermann */ 47502b15e34STodd Poynor static int __xipram chip_good(struct map_info *map, unsigned long addr, map_word expected) 476fb4a90bfSEric W. Biedermann { 477fb4a90bfSEric W. Biedermann map_word oldd, curd; 478fb4a90bfSEric W. Biedermann 479fb4a90bfSEric W. Biedermann oldd = map_read(map, addr); 480fb4a90bfSEric W. Biedermann curd = map_read(map, addr); 481fb4a90bfSEric W. Biedermann 482fb4a90bfSEric W. Biedermann return map_word_equal(map, oldd, curd) && 483fb4a90bfSEric W. Biedermann map_word_equal(map, curd, expected); 484fb4a90bfSEric W. Biedermann } 485fb4a90bfSEric W. Biedermann 4861da177e4SLinus Torvalds static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode) 4871da177e4SLinus Torvalds { 4881da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 4891da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 4901da177e4SLinus Torvalds unsigned long timeo; 4911da177e4SLinus Torvalds struct cfi_pri_amdstd *cfip = (struct cfi_pri_amdstd *)cfi->cmdset_priv; 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds resettime: 4941da177e4SLinus Torvalds timeo = jiffies + HZ; 4951da177e4SLinus Torvalds retry: 4961da177e4SLinus Torvalds switch (chip->state) { 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds case FL_STATUS: 4991da177e4SLinus Torvalds for (;;) { 5001da177e4SLinus Torvalds if (chip_ready(map, adr)) 5011da177e4SLinus Torvalds break; 5021da177e4SLinus Torvalds 5031da177e4SLinus Torvalds if (time_after(jiffies, timeo)) { 5041da177e4SLinus Torvalds printk(KERN_ERR "Waiting for chip to be ready timed out.\n"); 50502b15e34STodd Poynor spin_unlock(chip->mutex); 5061da177e4SLinus Torvalds return -EIO; 5071da177e4SLinus Torvalds } 50802b15e34STodd Poynor spin_unlock(chip->mutex); 5091da177e4SLinus Torvalds cfi_udelay(1); 51002b15e34STodd Poynor spin_lock(chip->mutex); 5111da177e4SLinus Torvalds /* Someone else might have been playing with it. */ 5121da177e4SLinus Torvalds goto retry; 5131da177e4SLinus Torvalds } 5141da177e4SLinus Torvalds 5151da177e4SLinus Torvalds case FL_READY: 5161da177e4SLinus Torvalds case FL_CFI_QUERY: 5171da177e4SLinus Torvalds case FL_JEDEC_QUERY: 5181da177e4SLinus Torvalds return 0; 5191da177e4SLinus Torvalds 5201da177e4SLinus Torvalds case FL_ERASING: 5211da177e4SLinus Torvalds if (mode == FL_WRITING) /* FIXME: Erase-suspend-program appears broken. */ 5221da177e4SLinus Torvalds goto sleep; 5231da177e4SLinus Torvalds 52489072ef9SRyan Jackson if (!( mode == FL_READY 52589072ef9SRyan Jackson || mode == FL_POINT 5261da177e4SLinus Torvalds || !cfip 5271da177e4SLinus Torvalds || (mode == FL_WRITING && (cfip->EraseSuspend & 0x2)) 52889072ef9SRyan Jackson || (mode == FL_WRITING && (cfip->EraseSuspend & 0x1) 52989072ef9SRyan Jackson ))) 5301da177e4SLinus Torvalds goto sleep; 5311da177e4SLinus Torvalds 5321da177e4SLinus Torvalds /* We could check to see if we're trying to access the sector 5331da177e4SLinus Torvalds * that is currently being erased. However, no user will try 5341da177e4SLinus Torvalds * anything like that so we just wait for the timeout. */ 5351da177e4SLinus Torvalds 5361da177e4SLinus Torvalds /* Erase suspend */ 5371da177e4SLinus Torvalds /* It's harmless to issue the Erase-Suspend and Erase-Resume 5381da177e4SLinus Torvalds * commands when the erase algorithm isn't in progress. */ 5391da177e4SLinus Torvalds map_write(map, CMD(0xB0), chip->in_progress_block_addr); 5401da177e4SLinus Torvalds chip->oldstate = FL_ERASING; 5411da177e4SLinus Torvalds chip->state = FL_ERASE_SUSPENDING; 5421da177e4SLinus Torvalds chip->erase_suspended = 1; 5431da177e4SLinus Torvalds for (;;) { 5441da177e4SLinus Torvalds if (chip_ready(map, adr)) 5451da177e4SLinus Torvalds break; 5461da177e4SLinus Torvalds 5471da177e4SLinus Torvalds if (time_after(jiffies, timeo)) { 5481da177e4SLinus Torvalds /* Should have suspended the erase by now. 5491da177e4SLinus Torvalds * Send an Erase-Resume command as either 5501da177e4SLinus Torvalds * there was an error (so leave the erase 5511da177e4SLinus Torvalds * routine to recover from it) or we trying to 5521da177e4SLinus Torvalds * use the erase-in-progress sector. */ 5531da177e4SLinus Torvalds map_write(map, CMD(0x30), chip->in_progress_block_addr); 5541da177e4SLinus Torvalds chip->state = FL_ERASING; 5551da177e4SLinus Torvalds chip->oldstate = FL_READY; 5561da177e4SLinus Torvalds printk(KERN_ERR "MTD %s(): chip not ready after erase suspend\n", __func__); 5571da177e4SLinus Torvalds return -EIO; 5581da177e4SLinus Torvalds } 5591da177e4SLinus Torvalds 56002b15e34STodd Poynor spin_unlock(chip->mutex); 5611da177e4SLinus Torvalds cfi_udelay(1); 56202b15e34STodd Poynor spin_lock(chip->mutex); 5631da177e4SLinus Torvalds /* Nobody will touch it while it's in state FL_ERASE_SUSPENDING. 5641da177e4SLinus Torvalds So we can just loop here. */ 5651da177e4SLinus Torvalds } 5661da177e4SLinus Torvalds chip->state = FL_READY; 5671da177e4SLinus Torvalds return 0; 5681da177e4SLinus Torvalds 56902b15e34STodd Poynor case FL_XIP_WHILE_ERASING: 57002b15e34STodd Poynor if (mode != FL_READY && mode != FL_POINT && 57102b15e34STodd Poynor (!cfip || !(cfip->EraseSuspend&2))) 57202b15e34STodd Poynor goto sleep; 57302b15e34STodd Poynor chip->oldstate = chip->state; 57402b15e34STodd Poynor chip->state = FL_READY; 57502b15e34STodd Poynor return 0; 57602b15e34STodd Poynor 5771da177e4SLinus Torvalds case FL_POINT: 5781da177e4SLinus Torvalds /* Only if there's no operation suspended... */ 5791da177e4SLinus Torvalds if (mode == FL_READY && chip->oldstate == FL_READY) 5801da177e4SLinus Torvalds return 0; 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds default: 5831da177e4SLinus Torvalds sleep: 5841da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 5851da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 58602b15e34STodd Poynor spin_unlock(chip->mutex); 5871da177e4SLinus Torvalds schedule(); 5881da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 58902b15e34STodd Poynor spin_lock(chip->mutex); 5901da177e4SLinus Torvalds goto resettime; 5911da177e4SLinus Torvalds } 5921da177e4SLinus Torvalds } 5931da177e4SLinus Torvalds 5941da177e4SLinus Torvalds 5951da177e4SLinus Torvalds static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr) 5961da177e4SLinus Torvalds { 5971da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 5981da177e4SLinus Torvalds 5991da177e4SLinus Torvalds switch(chip->oldstate) { 6001da177e4SLinus Torvalds case FL_ERASING: 6011da177e4SLinus Torvalds chip->state = chip->oldstate; 6021da177e4SLinus Torvalds map_write(map, CMD(0x30), chip->in_progress_block_addr); 6031da177e4SLinus Torvalds chip->oldstate = FL_READY; 6041da177e4SLinus Torvalds chip->state = FL_ERASING; 6051da177e4SLinus Torvalds break; 6061da177e4SLinus Torvalds 60702b15e34STodd Poynor case FL_XIP_WHILE_ERASING: 60802b15e34STodd Poynor chip->state = chip->oldstate; 60902b15e34STodd Poynor chip->oldstate = FL_READY; 61002b15e34STodd Poynor break; 61102b15e34STodd Poynor 6121da177e4SLinus Torvalds case FL_READY: 6131da177e4SLinus Torvalds case FL_STATUS: 6141da177e4SLinus Torvalds /* We should really make set_vpp() count, rather than doing this */ 6151da177e4SLinus Torvalds DISABLE_VPP(map); 6161da177e4SLinus Torvalds break; 6171da177e4SLinus Torvalds default: 6181da177e4SLinus Torvalds printk(KERN_ERR "MTD: put_chip() called with oldstate %d!!\n", chip->oldstate); 6191da177e4SLinus Torvalds } 6201da177e4SLinus Torvalds wake_up(&chip->wq); 6211da177e4SLinus Torvalds } 6221da177e4SLinus Torvalds 62302b15e34STodd Poynor #ifdef CONFIG_MTD_XIP 62402b15e34STodd Poynor 62502b15e34STodd Poynor /* 62602b15e34STodd Poynor * No interrupt what so ever can be serviced while the flash isn't in array 62702b15e34STodd Poynor * mode. This is ensured by the xip_disable() and xip_enable() functions 62802b15e34STodd Poynor * enclosing any code path where the flash is known not to be in array mode. 62902b15e34STodd Poynor * And within a XIP disabled code path, only functions marked with __xipram 63002b15e34STodd Poynor * may be called and nothing else (it's a good thing to inspect generated 63102b15e34STodd Poynor * assembly to make sure inline functions were actually inlined and that gcc 63202b15e34STodd Poynor * didn't emit calls to its own support functions). Also configuring MTD CFI 63302b15e34STodd Poynor * support to a single buswidth and a single interleave is also recommended. 63402b15e34STodd Poynor */ 635f8eb321bSThomas Gleixner 63602b15e34STodd Poynor static void xip_disable(struct map_info *map, struct flchip *chip, 63702b15e34STodd Poynor unsigned long adr) 63802b15e34STodd Poynor { 63902b15e34STodd Poynor /* TODO: chips with no XIP use should ignore and return */ 64002b15e34STodd Poynor (void) map_read(map, adr); /* ensure mmu mapping is up to date */ 64102b15e34STodd Poynor local_irq_disable(); 64202b15e34STodd Poynor } 64302b15e34STodd Poynor 64402b15e34STodd Poynor static void __xipram xip_enable(struct map_info *map, struct flchip *chip, 64502b15e34STodd Poynor unsigned long adr) 64602b15e34STodd Poynor { 64702b15e34STodd Poynor struct cfi_private *cfi = map->fldrv_priv; 64802b15e34STodd Poynor 64902b15e34STodd Poynor if (chip->state != FL_POINT && chip->state != FL_READY) { 65002b15e34STodd Poynor map_write(map, CMD(0xf0), adr); 65102b15e34STodd Poynor chip->state = FL_READY; 65202b15e34STodd Poynor } 65302b15e34STodd Poynor (void) map_read(map, adr); 65497f927a4SThomas Gleixner xip_iprefetch(); 65502b15e34STodd Poynor local_irq_enable(); 65602b15e34STodd Poynor } 65702b15e34STodd Poynor 65802b15e34STodd Poynor /* 65902b15e34STodd Poynor * When a delay is required for the flash operation to complete, the 66002b15e34STodd Poynor * xip_udelay() function is polling for both the given timeout and pending 66102b15e34STodd Poynor * (but still masked) hardware interrupts. Whenever there is an interrupt 66202b15e34STodd Poynor * pending then the flash erase operation is suspended, array mode restored 66302b15e34STodd Poynor * and interrupts unmasked. Task scheduling might also happen at that 66402b15e34STodd Poynor * point. The CPU eventually returns from the interrupt or the call to 66502b15e34STodd Poynor * schedule() and the suspended flash operation is resumed for the remaining 66602b15e34STodd Poynor * of the delay period. 66702b15e34STodd Poynor * 66802b15e34STodd Poynor * Warning: this function _will_ fool interrupt latency tracing tools. 66902b15e34STodd Poynor */ 67002b15e34STodd Poynor 67102b15e34STodd Poynor static void __xipram xip_udelay(struct map_info *map, struct flchip *chip, 67202b15e34STodd Poynor unsigned long adr, int usec) 67302b15e34STodd Poynor { 67402b15e34STodd Poynor struct cfi_private *cfi = map->fldrv_priv; 67502b15e34STodd Poynor struct cfi_pri_amdstd *extp = cfi->cmdset_priv; 67602b15e34STodd Poynor map_word status, OK = CMD(0x80); 67702b15e34STodd Poynor unsigned long suspended, start = xip_currtime(); 67802b15e34STodd Poynor flstate_t oldstate; 67902b15e34STodd Poynor 68002b15e34STodd Poynor do { 68102b15e34STodd Poynor cpu_relax(); 68202b15e34STodd Poynor if (xip_irqpending() && extp && 68302b15e34STodd Poynor ((chip->state == FL_ERASING && (extp->EraseSuspend & 2))) && 68402b15e34STodd Poynor (cfi_interleave_is_1(cfi) || chip->oldstate == FL_READY)) { 68502b15e34STodd Poynor /* 68602b15e34STodd Poynor * Let's suspend the erase operation when supported. 68702b15e34STodd Poynor * Note that we currently don't try to suspend 68802b15e34STodd Poynor * interleaved chips if there is already another 68902b15e34STodd Poynor * operation suspended (imagine what happens 69002b15e34STodd Poynor * when one chip was already done with the current 69102b15e34STodd Poynor * operation while another chip suspended it, then 69202b15e34STodd Poynor * we resume the whole thing at once). Yes, it 69302b15e34STodd Poynor * can happen! 69402b15e34STodd Poynor */ 69502b15e34STodd Poynor map_write(map, CMD(0xb0), adr); 69602b15e34STodd Poynor usec -= xip_elapsed_since(start); 69702b15e34STodd Poynor suspended = xip_currtime(); 69802b15e34STodd Poynor do { 69902b15e34STodd Poynor if (xip_elapsed_since(suspended) > 100000) { 70002b15e34STodd Poynor /* 70102b15e34STodd Poynor * The chip doesn't want to suspend 70202b15e34STodd Poynor * after waiting for 100 msecs. 70302b15e34STodd Poynor * This is a critical error but there 70402b15e34STodd Poynor * is not much we can do here. 70502b15e34STodd Poynor */ 70602b15e34STodd Poynor return; 70702b15e34STodd Poynor } 70802b15e34STodd Poynor status = map_read(map, adr); 70902b15e34STodd Poynor } while (!map_word_andequal(map, status, OK, OK)); 71002b15e34STodd Poynor 71102b15e34STodd Poynor /* Suspend succeeded */ 71202b15e34STodd Poynor oldstate = chip->state; 71302b15e34STodd Poynor if (!map_word_bitsset(map, status, CMD(0x40))) 71402b15e34STodd Poynor break; 71502b15e34STodd Poynor chip->state = FL_XIP_WHILE_ERASING; 71602b15e34STodd Poynor chip->erase_suspended = 1; 71702b15e34STodd Poynor map_write(map, CMD(0xf0), adr); 71802b15e34STodd Poynor (void) map_read(map, adr); 71902b15e34STodd Poynor asm volatile (".rep 8; nop; .endr"); 72002b15e34STodd Poynor local_irq_enable(); 72102b15e34STodd Poynor spin_unlock(chip->mutex); 72202b15e34STodd Poynor asm volatile (".rep 8; nop; .endr"); 72302b15e34STodd Poynor cond_resched(); 72402b15e34STodd Poynor 72502b15e34STodd Poynor /* 72602b15e34STodd Poynor * We're back. However someone else might have 72702b15e34STodd Poynor * decided to go write to the chip if we are in 72802b15e34STodd Poynor * a suspended erase state. If so let's wait 72902b15e34STodd Poynor * until it's done. 73002b15e34STodd Poynor */ 73102b15e34STodd Poynor spin_lock(chip->mutex); 73202b15e34STodd Poynor while (chip->state != FL_XIP_WHILE_ERASING) { 73302b15e34STodd Poynor DECLARE_WAITQUEUE(wait, current); 73402b15e34STodd Poynor set_current_state(TASK_UNINTERRUPTIBLE); 73502b15e34STodd Poynor add_wait_queue(&chip->wq, &wait); 73602b15e34STodd Poynor spin_unlock(chip->mutex); 73702b15e34STodd Poynor schedule(); 73802b15e34STodd Poynor remove_wait_queue(&chip->wq, &wait); 73902b15e34STodd Poynor spin_lock(chip->mutex); 74002b15e34STodd Poynor } 74102b15e34STodd Poynor /* Disallow XIP again */ 74202b15e34STodd Poynor local_irq_disable(); 74302b15e34STodd Poynor 74402b15e34STodd Poynor /* Resume the write or erase operation */ 74502b15e34STodd Poynor map_write(map, CMD(0x30), adr); 74602b15e34STodd Poynor chip->state = oldstate; 74702b15e34STodd Poynor start = xip_currtime(); 74802b15e34STodd Poynor } else if (usec >= 1000000/HZ) { 74902b15e34STodd Poynor /* 75002b15e34STodd Poynor * Try to save on CPU power when waiting delay 75102b15e34STodd Poynor * is at least a system timer tick period. 75202b15e34STodd Poynor * No need to be extremely accurate here. 75302b15e34STodd Poynor */ 75402b15e34STodd Poynor xip_cpu_idle(); 75502b15e34STodd Poynor } 75602b15e34STodd Poynor status = map_read(map, adr); 75702b15e34STodd Poynor } while (!map_word_andequal(map, status, OK, OK) 75802b15e34STodd Poynor && xip_elapsed_since(start) < usec); 75902b15e34STodd Poynor } 76002b15e34STodd Poynor 76102b15e34STodd Poynor #define UDELAY(map, chip, adr, usec) xip_udelay(map, chip, adr, usec) 76202b15e34STodd Poynor 76302b15e34STodd Poynor /* 76402b15e34STodd Poynor * The INVALIDATE_CACHED_RANGE() macro is normally used in parallel while 76502b15e34STodd Poynor * the flash is actively programming or erasing since we have to poll for 76602b15e34STodd Poynor * the operation to complete anyway. We can't do that in a generic way with 76702b15e34STodd Poynor * a XIP setup so do it before the actual flash operation in this case 76802b15e34STodd Poynor * and stub it out from INVALIDATE_CACHE_UDELAY. 76902b15e34STodd Poynor */ 77002b15e34STodd Poynor #define XIP_INVAL_CACHED_RANGE(map, from, size) \ 77102b15e34STodd Poynor INVALIDATE_CACHED_RANGE(map, from, size) 77202b15e34STodd Poynor 77302b15e34STodd Poynor #define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \ 77402b15e34STodd Poynor UDELAY(map, chip, adr, usec) 77502b15e34STodd Poynor 77602b15e34STodd Poynor /* 77702b15e34STodd Poynor * Extra notes: 77802b15e34STodd Poynor * 77902b15e34STodd Poynor * Activating this XIP support changes the way the code works a bit. For 78002b15e34STodd Poynor * example the code to suspend the current process when concurrent access 78102b15e34STodd Poynor * happens is never executed because xip_udelay() will always return with the 78202b15e34STodd Poynor * same chip state as it was entered with. This is why there is no care for 78302b15e34STodd Poynor * the presence of add_wait_queue() or schedule() calls from within a couple 78402b15e34STodd Poynor * xip_disable()'d areas of code, like in do_erase_oneblock for example. 78502b15e34STodd Poynor * The queueing and scheduling are always happening within xip_udelay(). 78602b15e34STodd Poynor * 78702b15e34STodd Poynor * Similarly, get_chip() and put_chip() just happen to always be executed 78802b15e34STodd Poynor * with chip->state set to FL_READY (or FL_XIP_WHILE_*) where flash state 78902b15e34STodd Poynor * is in array mode, therefore never executing many cases therein and not 79002b15e34STodd Poynor * causing any problem with XIP. 79102b15e34STodd Poynor */ 79202b15e34STodd Poynor 79302b15e34STodd Poynor #else 79402b15e34STodd Poynor 79502b15e34STodd Poynor #define xip_disable(map, chip, adr) 79602b15e34STodd Poynor #define xip_enable(map, chip, adr) 79702b15e34STodd Poynor #define XIP_INVAL_CACHED_RANGE(x...) 79802b15e34STodd Poynor 79902b15e34STodd Poynor #define UDELAY(map, chip, adr, usec) \ 80002b15e34STodd Poynor do { \ 80102b15e34STodd Poynor spin_unlock(chip->mutex); \ 80202b15e34STodd Poynor cfi_udelay(usec); \ 80302b15e34STodd Poynor spin_lock(chip->mutex); \ 80402b15e34STodd Poynor } while (0) 80502b15e34STodd Poynor 80602b15e34STodd Poynor #define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \ 80702b15e34STodd Poynor do { \ 80802b15e34STodd Poynor spin_unlock(chip->mutex); \ 80902b15e34STodd Poynor INVALIDATE_CACHED_RANGE(map, adr, len); \ 81002b15e34STodd Poynor cfi_udelay(usec); \ 81102b15e34STodd Poynor spin_lock(chip->mutex); \ 81202b15e34STodd Poynor } while (0) 81302b15e34STodd Poynor 81402b15e34STodd Poynor #endif 8151da177e4SLinus Torvalds 8161da177e4SLinus Torvalds static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) 8171da177e4SLinus Torvalds { 8181da177e4SLinus Torvalds unsigned long cmd_addr; 8191da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 8201da177e4SLinus Torvalds int ret; 8211da177e4SLinus Torvalds 8221da177e4SLinus Torvalds adr += chip->start; 8231da177e4SLinus Torvalds 8241da177e4SLinus Torvalds /* Ensure cmd read/writes are aligned. */ 8251da177e4SLinus Torvalds cmd_addr = adr & ~(map_bankwidth(map)-1); 8261da177e4SLinus Torvalds 82702b15e34STodd Poynor spin_lock(chip->mutex); 8281da177e4SLinus Torvalds ret = get_chip(map, chip, cmd_addr, FL_READY); 8291da177e4SLinus Torvalds if (ret) { 83002b15e34STodd Poynor spin_unlock(chip->mutex); 8311da177e4SLinus Torvalds return ret; 8321da177e4SLinus Torvalds } 8331da177e4SLinus Torvalds 8341da177e4SLinus Torvalds if (chip->state != FL_POINT && chip->state != FL_READY) { 8351da177e4SLinus Torvalds map_write(map, CMD(0xf0), cmd_addr); 8361da177e4SLinus Torvalds chip->state = FL_READY; 8371da177e4SLinus Torvalds } 8381da177e4SLinus Torvalds 8391da177e4SLinus Torvalds map_copy_from(map, buf, adr, len); 8401da177e4SLinus Torvalds 8411da177e4SLinus Torvalds put_chip(map, chip, cmd_addr); 8421da177e4SLinus Torvalds 84302b15e34STodd Poynor spin_unlock(chip->mutex); 8441da177e4SLinus Torvalds return 0; 8451da177e4SLinus Torvalds } 8461da177e4SLinus Torvalds 8471da177e4SLinus Torvalds 8481da177e4SLinus Torvalds static int cfi_amdstd_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) 8491da177e4SLinus Torvalds { 8501da177e4SLinus Torvalds struct map_info *map = mtd->priv; 8511da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 8521da177e4SLinus Torvalds unsigned long ofs; 8531da177e4SLinus Torvalds int chipnum; 8541da177e4SLinus Torvalds int ret = 0; 8551da177e4SLinus Torvalds 8561da177e4SLinus Torvalds /* ofs: offset within the first chip that the first read should start */ 8571da177e4SLinus Torvalds 8581da177e4SLinus Torvalds chipnum = (from >> cfi->chipshift); 8591da177e4SLinus Torvalds ofs = from - (chipnum << cfi->chipshift); 8601da177e4SLinus Torvalds 8611da177e4SLinus Torvalds 8621da177e4SLinus Torvalds *retlen = 0; 8631da177e4SLinus Torvalds 8641da177e4SLinus Torvalds while (len) { 8651da177e4SLinus Torvalds unsigned long thislen; 8661da177e4SLinus Torvalds 8671da177e4SLinus Torvalds if (chipnum >= cfi->numchips) 8681da177e4SLinus Torvalds break; 8691da177e4SLinus Torvalds 8701da177e4SLinus Torvalds if ((len + ofs -1) >> cfi->chipshift) 8711da177e4SLinus Torvalds thislen = (1<<cfi->chipshift) - ofs; 8721da177e4SLinus Torvalds else 8731da177e4SLinus Torvalds thislen = len; 8741da177e4SLinus Torvalds 8751da177e4SLinus Torvalds ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); 8761da177e4SLinus Torvalds if (ret) 8771da177e4SLinus Torvalds break; 8781da177e4SLinus Torvalds 8791da177e4SLinus Torvalds *retlen += thislen; 8801da177e4SLinus Torvalds len -= thislen; 8811da177e4SLinus Torvalds buf += thislen; 8821da177e4SLinus Torvalds 8831da177e4SLinus Torvalds ofs = 0; 8841da177e4SLinus Torvalds chipnum++; 8851da177e4SLinus Torvalds } 8861da177e4SLinus Torvalds return ret; 8871da177e4SLinus Torvalds } 8881da177e4SLinus Torvalds 8891da177e4SLinus Torvalds 8901da177e4SLinus Torvalds static inline int do_read_secsi_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) 8911da177e4SLinus Torvalds { 8921da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 8931da177e4SLinus Torvalds unsigned long timeo = jiffies + HZ; 8941da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 8951da177e4SLinus Torvalds 8961da177e4SLinus Torvalds retry: 89702b15e34STodd Poynor spin_lock(chip->mutex); 8981da177e4SLinus Torvalds 8991da177e4SLinus Torvalds if (chip->state != FL_READY){ 9001da177e4SLinus Torvalds #if 0 9011da177e4SLinus Torvalds printk(KERN_DEBUG "Waiting for chip to read, status = %d\n", chip->state); 9021da177e4SLinus Torvalds #endif 9031da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 9041da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 9051da177e4SLinus Torvalds 90602b15e34STodd Poynor spin_unlock(chip->mutex); 9071da177e4SLinus Torvalds 9081da177e4SLinus Torvalds schedule(); 9091da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 9101da177e4SLinus Torvalds #if 0 9111da177e4SLinus Torvalds if(signal_pending(current)) 9121da177e4SLinus Torvalds return -EINTR; 9131da177e4SLinus Torvalds #endif 9141da177e4SLinus Torvalds timeo = jiffies + HZ; 9151da177e4SLinus Torvalds 9161da177e4SLinus Torvalds goto retry; 9171da177e4SLinus Torvalds } 9181da177e4SLinus Torvalds 9191da177e4SLinus Torvalds adr += chip->start; 9201da177e4SLinus Torvalds 9211da177e4SLinus Torvalds chip->state = FL_READY; 9221da177e4SLinus Torvalds 9231da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 9241da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 9251da177e4SLinus Torvalds cfi_send_gen_cmd(0x88, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 9261da177e4SLinus Torvalds 9271da177e4SLinus Torvalds map_copy_from(map, buf, adr, len); 9281da177e4SLinus Torvalds 9291da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 9301da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 9311da177e4SLinus Torvalds cfi_send_gen_cmd(0x90, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 9321da177e4SLinus Torvalds cfi_send_gen_cmd(0x00, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 9331da177e4SLinus Torvalds 9341da177e4SLinus Torvalds wake_up(&chip->wq); 93502b15e34STodd Poynor spin_unlock(chip->mutex); 9361da177e4SLinus Torvalds 9371da177e4SLinus Torvalds return 0; 9381da177e4SLinus Torvalds } 9391da177e4SLinus Torvalds 9401da177e4SLinus Torvalds static int cfi_amdstd_secsi_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) 9411da177e4SLinus Torvalds { 9421da177e4SLinus Torvalds struct map_info *map = mtd->priv; 9431da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 9441da177e4SLinus Torvalds unsigned long ofs; 9451da177e4SLinus Torvalds int chipnum; 9461da177e4SLinus Torvalds int ret = 0; 9471da177e4SLinus Torvalds 9481da177e4SLinus Torvalds 9491da177e4SLinus Torvalds /* ofs: offset within the first chip that the first read should start */ 9501da177e4SLinus Torvalds 9511da177e4SLinus Torvalds /* 8 secsi bytes per chip */ 9521da177e4SLinus Torvalds chipnum=from>>3; 9531da177e4SLinus Torvalds ofs=from & 7; 9541da177e4SLinus Torvalds 9551da177e4SLinus Torvalds 9561da177e4SLinus Torvalds *retlen = 0; 9571da177e4SLinus Torvalds 9581da177e4SLinus Torvalds while (len) { 9591da177e4SLinus Torvalds unsigned long thislen; 9601da177e4SLinus Torvalds 9611da177e4SLinus Torvalds if (chipnum >= cfi->numchips) 9621da177e4SLinus Torvalds break; 9631da177e4SLinus Torvalds 9641da177e4SLinus Torvalds if ((len + ofs -1) >> 3) 9651da177e4SLinus Torvalds thislen = (1<<3) - ofs; 9661da177e4SLinus Torvalds else 9671da177e4SLinus Torvalds thislen = len; 9681da177e4SLinus Torvalds 9691da177e4SLinus Torvalds ret = do_read_secsi_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); 9701da177e4SLinus Torvalds if (ret) 9711da177e4SLinus Torvalds break; 9721da177e4SLinus Torvalds 9731da177e4SLinus Torvalds *retlen += thislen; 9741da177e4SLinus Torvalds len -= thislen; 9751da177e4SLinus Torvalds buf += thislen; 9761da177e4SLinus Torvalds 9771da177e4SLinus Torvalds ofs = 0; 9781da177e4SLinus Torvalds chipnum++; 9791da177e4SLinus Torvalds } 9801da177e4SLinus Torvalds return ret; 9811da177e4SLinus Torvalds } 9821da177e4SLinus Torvalds 9831da177e4SLinus Torvalds 98402b15e34STodd Poynor static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, unsigned long adr, map_word datum) 9851da177e4SLinus Torvalds { 9861da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 9871da177e4SLinus Torvalds unsigned long timeo = jiffies + HZ; 9881da177e4SLinus Torvalds /* 9891da177e4SLinus Torvalds * We use a 1ms + 1 jiffies generic timeout for writes (most devices 9901da177e4SLinus Torvalds * have a max write time of a few hundreds usec). However, we should 9911da177e4SLinus Torvalds * use the maximum timeout value given by the chip at probe time 9921da177e4SLinus Torvalds * instead. Unfortunately, struct flchip does have a field for 9931da177e4SLinus Torvalds * maximum timeout, only for typical which can be far too short 9941da177e4SLinus Torvalds * depending of the conditions. The ' + 1' is to avoid having a 9951da177e4SLinus Torvalds * timeout of 0 jiffies if HZ is smaller than 1000. 9961da177e4SLinus Torvalds */ 9971da177e4SLinus Torvalds unsigned long uWriteTimeout = ( HZ / 1000 ) + 1; 9981da177e4SLinus Torvalds int ret = 0; 9991da177e4SLinus Torvalds map_word oldd; 10001da177e4SLinus Torvalds int retry_cnt = 0; 10011da177e4SLinus Torvalds 10021da177e4SLinus Torvalds adr += chip->start; 10031da177e4SLinus Torvalds 100402b15e34STodd Poynor spin_lock(chip->mutex); 10051da177e4SLinus Torvalds ret = get_chip(map, chip, adr, FL_WRITING); 10061da177e4SLinus Torvalds if (ret) { 100702b15e34STodd Poynor spin_unlock(chip->mutex); 10081da177e4SLinus Torvalds return ret; 10091da177e4SLinus Torvalds } 10101da177e4SLinus Torvalds 10111da177e4SLinus Torvalds DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n", 10121da177e4SLinus Torvalds __func__, adr, datum.x[0] ); 10131da177e4SLinus Torvalds 10141da177e4SLinus Torvalds /* 10151da177e4SLinus Torvalds * Check for a NOP for the case when the datum to write is already 10161da177e4SLinus Torvalds * present - it saves time and works around buggy chips that corrupt 10171da177e4SLinus Torvalds * data at other locations when 0xff is written to a location that 10181da177e4SLinus Torvalds * already contains 0xff. 10191da177e4SLinus Torvalds */ 10201da177e4SLinus Torvalds oldd = map_read(map, adr); 10211da177e4SLinus Torvalds if (map_word_equal(map, oldd, datum)) { 10221da177e4SLinus Torvalds DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): NOP\n", 10231da177e4SLinus Torvalds __func__); 10241da177e4SLinus Torvalds goto op_done; 10251da177e4SLinus Torvalds } 10261da177e4SLinus Torvalds 102702b15e34STodd Poynor XIP_INVAL_CACHED_RANGE(map, adr, map_bankwidth(map)); 10281da177e4SLinus Torvalds ENABLE_VPP(map); 102902b15e34STodd Poynor xip_disable(map, chip, adr); 10301da177e4SLinus Torvalds retry: 10311da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 10321da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 10331da177e4SLinus Torvalds cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 10341da177e4SLinus Torvalds map_write(map, datum, adr); 10351da177e4SLinus Torvalds chip->state = FL_WRITING; 10361da177e4SLinus Torvalds 103702b15e34STodd Poynor INVALIDATE_CACHE_UDELAY(map, chip, 103802b15e34STodd Poynor adr, map_bankwidth(map), 103902b15e34STodd Poynor chip->word_write_time); 10401da177e4SLinus Torvalds 10411da177e4SLinus Torvalds /* See comment above for timeout value. */ 10421da177e4SLinus Torvalds timeo = jiffies + uWriteTimeout; 10431da177e4SLinus Torvalds for (;;) { 10441da177e4SLinus Torvalds if (chip->state != FL_WRITING) { 10451da177e4SLinus Torvalds /* Someone's suspended the write. Sleep */ 10461da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 10471da177e4SLinus Torvalds 10481da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 10491da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 105002b15e34STodd Poynor spin_unlock(chip->mutex); 10511da177e4SLinus Torvalds schedule(); 10521da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 10531da177e4SLinus Torvalds timeo = jiffies + (HZ / 2); /* FIXME */ 105402b15e34STodd Poynor spin_lock(chip->mutex); 10551da177e4SLinus Torvalds continue; 10561da177e4SLinus Torvalds } 10571da177e4SLinus Torvalds 1058b95f9609SKonstantin Baidarov if (time_after(jiffies, timeo) && !chip_ready(map, adr)){ 105902b15e34STodd Poynor xip_enable(map, chip, adr); 1060fb4a90bfSEric W. Biedermann printk(KERN_WARNING "MTD %s(): software timeout\n", __func__); 106102b15e34STodd Poynor xip_disable(map, chip, adr); 1062fb4a90bfSEric W. Biedermann break; 1063fb4a90bfSEric W. Biedermann } 1064fb4a90bfSEric W. Biedermann 1065b95f9609SKonstantin Baidarov if (chip_ready(map, adr)) 1066b95f9609SKonstantin Baidarov break; 1067b95f9609SKonstantin Baidarov 10681da177e4SLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 106902b15e34STodd Poynor UDELAY(map, chip, adr, 1); 10701da177e4SLinus Torvalds } 1071fb4a90bfSEric W. Biedermann /* Did we succeed? */ 1072fb4a90bfSEric W. Biedermann if (!chip_good(map, adr, datum)) { 10731da177e4SLinus Torvalds /* reset on all failures. */ 10741da177e4SLinus Torvalds map_write( map, CMD(0xF0), chip->start ); 10751da177e4SLinus Torvalds /* FIXME - should have reset delay before continuing */ 1076fb4a90bfSEric W. Biedermann 10771da177e4SLinus Torvalds if (++retry_cnt <= MAX_WORD_RETRIES) 10781da177e4SLinus Torvalds goto retry; 10791da177e4SLinus Torvalds 10801da177e4SLinus Torvalds ret = -EIO; 1081fb4a90bfSEric W. Biedermann } 108202b15e34STodd Poynor xip_enable(map, chip, adr); 10831da177e4SLinus Torvalds op_done: 10841da177e4SLinus Torvalds chip->state = FL_READY; 10851da177e4SLinus Torvalds put_chip(map, chip, adr); 108602b15e34STodd Poynor spin_unlock(chip->mutex); 10871da177e4SLinus Torvalds 10881da177e4SLinus Torvalds return ret; 10891da177e4SLinus Torvalds } 10901da177e4SLinus Torvalds 10911da177e4SLinus Torvalds 10921da177e4SLinus Torvalds static int cfi_amdstd_write_words(struct mtd_info *mtd, loff_t to, size_t len, 10931da177e4SLinus Torvalds size_t *retlen, const u_char *buf) 10941da177e4SLinus Torvalds { 10951da177e4SLinus Torvalds struct map_info *map = mtd->priv; 10961da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 10971da177e4SLinus Torvalds int ret = 0; 10981da177e4SLinus Torvalds int chipnum; 10991da177e4SLinus Torvalds unsigned long ofs, chipstart; 11001da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 11011da177e4SLinus Torvalds 11021da177e4SLinus Torvalds *retlen = 0; 11031da177e4SLinus Torvalds if (!len) 11041da177e4SLinus Torvalds return 0; 11051da177e4SLinus Torvalds 11061da177e4SLinus Torvalds chipnum = to >> cfi->chipshift; 11071da177e4SLinus Torvalds ofs = to - (chipnum << cfi->chipshift); 11081da177e4SLinus Torvalds chipstart = cfi->chips[chipnum].start; 11091da177e4SLinus Torvalds 11101da177e4SLinus Torvalds /* If it's not bus-aligned, do the first byte write */ 11111da177e4SLinus Torvalds if (ofs & (map_bankwidth(map)-1)) { 11121da177e4SLinus Torvalds unsigned long bus_ofs = ofs & ~(map_bankwidth(map)-1); 11131da177e4SLinus Torvalds int i = ofs - bus_ofs; 11141da177e4SLinus Torvalds int n = 0; 11151da177e4SLinus Torvalds map_word tmp_buf; 11161da177e4SLinus Torvalds 11171da177e4SLinus Torvalds retry: 111802b15e34STodd Poynor spin_lock(cfi->chips[chipnum].mutex); 11191da177e4SLinus Torvalds 11201da177e4SLinus Torvalds if (cfi->chips[chipnum].state != FL_READY) { 11211da177e4SLinus Torvalds #if 0 11221da177e4SLinus Torvalds printk(KERN_DEBUG "Waiting for chip to write, status = %d\n", cfi->chips[chipnum].state); 11231da177e4SLinus Torvalds #endif 11241da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 11251da177e4SLinus Torvalds add_wait_queue(&cfi->chips[chipnum].wq, &wait); 11261da177e4SLinus Torvalds 112702b15e34STodd Poynor spin_unlock(cfi->chips[chipnum].mutex); 11281da177e4SLinus Torvalds 11291da177e4SLinus Torvalds schedule(); 11301da177e4SLinus Torvalds remove_wait_queue(&cfi->chips[chipnum].wq, &wait); 11311da177e4SLinus Torvalds #if 0 11321da177e4SLinus Torvalds if(signal_pending(current)) 11331da177e4SLinus Torvalds return -EINTR; 11341da177e4SLinus Torvalds #endif 11351da177e4SLinus Torvalds goto retry; 11361da177e4SLinus Torvalds } 11371da177e4SLinus Torvalds 11381da177e4SLinus Torvalds /* Load 'tmp_buf' with old contents of flash */ 11391da177e4SLinus Torvalds tmp_buf = map_read(map, bus_ofs+chipstart); 11401da177e4SLinus Torvalds 114102b15e34STodd Poynor spin_unlock(cfi->chips[chipnum].mutex); 11421da177e4SLinus Torvalds 11431da177e4SLinus Torvalds /* Number of bytes to copy from buffer */ 11441da177e4SLinus Torvalds n = min_t(int, len, map_bankwidth(map)-i); 11451da177e4SLinus Torvalds 11461da177e4SLinus Torvalds tmp_buf = map_word_load_partial(map, tmp_buf, buf, i, n); 11471da177e4SLinus Torvalds 11481da177e4SLinus Torvalds ret = do_write_oneword(map, &cfi->chips[chipnum], 11491da177e4SLinus Torvalds bus_ofs, tmp_buf); 11501da177e4SLinus Torvalds if (ret) 11511da177e4SLinus Torvalds return ret; 11521da177e4SLinus Torvalds 11531da177e4SLinus Torvalds ofs += n; 11541da177e4SLinus Torvalds buf += n; 11551da177e4SLinus Torvalds (*retlen) += n; 11561da177e4SLinus Torvalds len -= n; 11571da177e4SLinus Torvalds 11581da177e4SLinus Torvalds if (ofs >> cfi->chipshift) { 11591da177e4SLinus Torvalds chipnum ++; 11601da177e4SLinus Torvalds ofs = 0; 11611da177e4SLinus Torvalds if (chipnum == cfi->numchips) 11621da177e4SLinus Torvalds return 0; 11631da177e4SLinus Torvalds } 11641da177e4SLinus Torvalds } 11651da177e4SLinus Torvalds 11661da177e4SLinus Torvalds /* We are now aligned, write as much as possible */ 11671da177e4SLinus Torvalds while(len >= map_bankwidth(map)) { 11681da177e4SLinus Torvalds map_word datum; 11691da177e4SLinus Torvalds 11701da177e4SLinus Torvalds datum = map_word_load(map, buf); 11711da177e4SLinus Torvalds 11721da177e4SLinus Torvalds ret = do_write_oneword(map, &cfi->chips[chipnum], 11731da177e4SLinus Torvalds ofs, datum); 11741da177e4SLinus Torvalds if (ret) 11751da177e4SLinus Torvalds return ret; 11761da177e4SLinus Torvalds 11771da177e4SLinus Torvalds ofs += map_bankwidth(map); 11781da177e4SLinus Torvalds buf += map_bankwidth(map); 11791da177e4SLinus Torvalds (*retlen) += map_bankwidth(map); 11801da177e4SLinus Torvalds len -= map_bankwidth(map); 11811da177e4SLinus Torvalds 11821da177e4SLinus Torvalds if (ofs >> cfi->chipshift) { 11831da177e4SLinus Torvalds chipnum ++; 11841da177e4SLinus Torvalds ofs = 0; 11851da177e4SLinus Torvalds if (chipnum == cfi->numchips) 11861da177e4SLinus Torvalds return 0; 11871da177e4SLinus Torvalds chipstart = cfi->chips[chipnum].start; 11881da177e4SLinus Torvalds } 11891da177e4SLinus Torvalds } 11901da177e4SLinus Torvalds 11911da177e4SLinus Torvalds /* Write the trailing bytes if any */ 11921da177e4SLinus Torvalds if (len & (map_bankwidth(map)-1)) { 11931da177e4SLinus Torvalds map_word tmp_buf; 11941da177e4SLinus Torvalds 11951da177e4SLinus Torvalds retry1: 119602b15e34STodd Poynor spin_lock(cfi->chips[chipnum].mutex); 11971da177e4SLinus Torvalds 11981da177e4SLinus Torvalds if (cfi->chips[chipnum].state != FL_READY) { 11991da177e4SLinus Torvalds #if 0 12001da177e4SLinus Torvalds printk(KERN_DEBUG "Waiting for chip to write, status = %d\n", cfi->chips[chipnum].state); 12011da177e4SLinus Torvalds #endif 12021da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 12031da177e4SLinus Torvalds add_wait_queue(&cfi->chips[chipnum].wq, &wait); 12041da177e4SLinus Torvalds 120502b15e34STodd Poynor spin_unlock(cfi->chips[chipnum].mutex); 12061da177e4SLinus Torvalds 12071da177e4SLinus Torvalds schedule(); 12081da177e4SLinus Torvalds remove_wait_queue(&cfi->chips[chipnum].wq, &wait); 12091da177e4SLinus Torvalds #if 0 12101da177e4SLinus Torvalds if(signal_pending(current)) 12111da177e4SLinus Torvalds return -EINTR; 12121da177e4SLinus Torvalds #endif 12131da177e4SLinus Torvalds goto retry1; 12141da177e4SLinus Torvalds } 12151da177e4SLinus Torvalds 12161da177e4SLinus Torvalds tmp_buf = map_read(map, ofs + chipstart); 12171da177e4SLinus Torvalds 121802b15e34STodd Poynor spin_unlock(cfi->chips[chipnum].mutex); 12191da177e4SLinus Torvalds 12201da177e4SLinus Torvalds tmp_buf = map_word_load_partial(map, tmp_buf, buf, 0, len); 12211da177e4SLinus Torvalds 12221da177e4SLinus Torvalds ret = do_write_oneword(map, &cfi->chips[chipnum], 12231da177e4SLinus Torvalds ofs, tmp_buf); 12241da177e4SLinus Torvalds if (ret) 12251da177e4SLinus Torvalds return ret; 12261da177e4SLinus Torvalds 12271da177e4SLinus Torvalds (*retlen) += len; 12281da177e4SLinus Torvalds } 12291da177e4SLinus Torvalds 12301da177e4SLinus Torvalds return 0; 12311da177e4SLinus Torvalds } 12321da177e4SLinus Torvalds 12331da177e4SLinus Torvalds 12341da177e4SLinus Torvalds /* 12351da177e4SLinus Torvalds * FIXME: interleaved mode not tested, and probably not supported! 12361da177e4SLinus Torvalds */ 123702b15e34STodd Poynor static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, 123802b15e34STodd Poynor unsigned long adr, const u_char *buf, 123902b15e34STodd Poynor int len) 12401da177e4SLinus Torvalds { 12411da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 12421da177e4SLinus Torvalds unsigned long timeo = jiffies + HZ; 12431da177e4SLinus Torvalds /* see comments in do_write_oneword() regarding uWriteTimeo. */ 12441da177e4SLinus Torvalds unsigned long uWriteTimeout = ( HZ / 1000 ) + 1; 12451da177e4SLinus Torvalds int ret = -EIO; 12461da177e4SLinus Torvalds unsigned long cmd_adr; 12471da177e4SLinus Torvalds int z, words; 12481da177e4SLinus Torvalds map_word datum; 12491da177e4SLinus Torvalds 12501da177e4SLinus Torvalds adr += chip->start; 12511da177e4SLinus Torvalds cmd_adr = adr; 12521da177e4SLinus Torvalds 125302b15e34STodd Poynor spin_lock(chip->mutex); 12541da177e4SLinus Torvalds ret = get_chip(map, chip, adr, FL_WRITING); 12551da177e4SLinus Torvalds if (ret) { 125602b15e34STodd Poynor spin_unlock(chip->mutex); 12571da177e4SLinus Torvalds return ret; 12581da177e4SLinus Torvalds } 12591da177e4SLinus Torvalds 12601da177e4SLinus Torvalds datum = map_word_load(map, buf); 12611da177e4SLinus Torvalds 12621da177e4SLinus Torvalds DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n", 12631da177e4SLinus Torvalds __func__, adr, datum.x[0] ); 12641da177e4SLinus Torvalds 126502b15e34STodd Poynor XIP_INVAL_CACHED_RANGE(map, adr, len); 12661da177e4SLinus Torvalds ENABLE_VPP(map); 126702b15e34STodd Poynor xip_disable(map, chip, cmd_adr); 126802b15e34STodd Poynor 12691da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 12701da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 12711da177e4SLinus Torvalds //cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 12721da177e4SLinus Torvalds 12731da177e4SLinus Torvalds /* Write Buffer Load */ 12741da177e4SLinus Torvalds map_write(map, CMD(0x25), cmd_adr); 12751da177e4SLinus Torvalds 12761da177e4SLinus Torvalds chip->state = FL_WRITING_TO_BUFFER; 12771da177e4SLinus Torvalds 12781da177e4SLinus Torvalds /* Write length of data to come */ 12791da177e4SLinus Torvalds words = len / map_bankwidth(map); 12801da177e4SLinus Torvalds map_write(map, CMD(words - 1), cmd_adr); 12811da177e4SLinus Torvalds /* Write data */ 12821da177e4SLinus Torvalds z = 0; 12831da177e4SLinus Torvalds while(z < words * map_bankwidth(map)) { 12841da177e4SLinus Torvalds datum = map_word_load(map, buf); 12851da177e4SLinus Torvalds map_write(map, datum, adr + z); 12861da177e4SLinus Torvalds 12871da177e4SLinus Torvalds z += map_bankwidth(map); 12881da177e4SLinus Torvalds buf += map_bankwidth(map); 12891da177e4SLinus Torvalds } 12901da177e4SLinus Torvalds z -= map_bankwidth(map); 12911da177e4SLinus Torvalds 12921da177e4SLinus Torvalds adr += z; 12931da177e4SLinus Torvalds 12941da177e4SLinus Torvalds /* Write Buffer Program Confirm: GO GO GO */ 12951da177e4SLinus Torvalds map_write(map, CMD(0x29), cmd_adr); 12961da177e4SLinus Torvalds chip->state = FL_WRITING; 12971da177e4SLinus Torvalds 129802b15e34STodd Poynor INVALIDATE_CACHE_UDELAY(map, chip, 129902b15e34STodd Poynor adr, map_bankwidth(map), 130002b15e34STodd Poynor chip->word_write_time); 13011da177e4SLinus Torvalds 13021da177e4SLinus Torvalds timeo = jiffies + uWriteTimeout; 13031da177e4SLinus Torvalds 13041da177e4SLinus Torvalds for (;;) { 13051da177e4SLinus Torvalds if (chip->state != FL_WRITING) { 13061da177e4SLinus Torvalds /* Someone's suspended the write. Sleep */ 13071da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 13081da177e4SLinus Torvalds 13091da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 13101da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 131102b15e34STodd Poynor spin_unlock(chip->mutex); 13121da177e4SLinus Torvalds schedule(); 13131da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 13141da177e4SLinus Torvalds timeo = jiffies + (HZ / 2); /* FIXME */ 131502b15e34STodd Poynor spin_lock(chip->mutex); 13161da177e4SLinus Torvalds continue; 13171da177e4SLinus Torvalds } 13181da177e4SLinus Torvalds 1319b95f9609SKonstantin Baidarov if (time_after(jiffies, timeo) && !chip_ready(map, adr)) 1320b95f9609SKonstantin Baidarov break; 1321b95f9609SKonstantin Baidarov 132202b15e34STodd Poynor if (chip_ready(map, adr)) { 132302b15e34STodd Poynor xip_enable(map, chip, adr); 13241da177e4SLinus Torvalds goto op_done; 132502b15e34STodd Poynor } 13261da177e4SLinus Torvalds 13271da177e4SLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 132802b15e34STodd Poynor UDELAY(map, chip, adr, 1); 13291da177e4SLinus Torvalds } 13301da177e4SLinus Torvalds 13311da177e4SLinus Torvalds /* reset on all failures. */ 13321da177e4SLinus Torvalds map_write( map, CMD(0xF0), chip->start ); 133302b15e34STodd Poynor xip_enable(map, chip, adr); 13341da177e4SLinus Torvalds /* FIXME - should have reset delay before continuing */ 13351da177e4SLinus Torvalds 133602b15e34STodd Poynor printk(KERN_WARNING "MTD %s(): software timeout\n", 133702b15e34STodd Poynor __func__ ); 133802b15e34STodd Poynor 13391da177e4SLinus Torvalds ret = -EIO; 13401da177e4SLinus Torvalds op_done: 13411da177e4SLinus Torvalds chip->state = FL_READY; 13421da177e4SLinus Torvalds put_chip(map, chip, adr); 134302b15e34STodd Poynor spin_unlock(chip->mutex); 13441da177e4SLinus Torvalds 13451da177e4SLinus Torvalds return ret; 13461da177e4SLinus Torvalds } 13471da177e4SLinus Torvalds 13481da177e4SLinus Torvalds 13491da177e4SLinus Torvalds static int cfi_amdstd_write_buffers(struct mtd_info *mtd, loff_t to, size_t len, 13501da177e4SLinus Torvalds size_t *retlen, const u_char *buf) 13511da177e4SLinus Torvalds { 13521da177e4SLinus Torvalds struct map_info *map = mtd->priv; 13531da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 13541da177e4SLinus Torvalds int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; 13551da177e4SLinus Torvalds int ret = 0; 13561da177e4SLinus Torvalds int chipnum; 13571da177e4SLinus Torvalds unsigned long ofs; 13581da177e4SLinus Torvalds 13591da177e4SLinus Torvalds *retlen = 0; 13601da177e4SLinus Torvalds if (!len) 13611da177e4SLinus Torvalds return 0; 13621da177e4SLinus Torvalds 13631da177e4SLinus Torvalds chipnum = to >> cfi->chipshift; 13641da177e4SLinus Torvalds ofs = to - (chipnum << cfi->chipshift); 13651da177e4SLinus Torvalds 13661da177e4SLinus Torvalds /* If it's not bus-aligned, do the first word write */ 13671da177e4SLinus Torvalds if (ofs & (map_bankwidth(map)-1)) { 13681da177e4SLinus Torvalds size_t local_len = (-ofs)&(map_bankwidth(map)-1); 13691da177e4SLinus Torvalds if (local_len > len) 13701da177e4SLinus Torvalds local_len = len; 13711da177e4SLinus Torvalds ret = cfi_amdstd_write_words(mtd, ofs + (chipnum<<cfi->chipshift), 13721da177e4SLinus Torvalds local_len, retlen, buf); 13731da177e4SLinus Torvalds if (ret) 13741da177e4SLinus Torvalds return ret; 13751da177e4SLinus Torvalds ofs += local_len; 13761da177e4SLinus Torvalds buf += local_len; 13771da177e4SLinus Torvalds len -= local_len; 13781da177e4SLinus Torvalds 13791da177e4SLinus Torvalds if (ofs >> cfi->chipshift) { 13801da177e4SLinus Torvalds chipnum ++; 13811da177e4SLinus Torvalds ofs = 0; 13821da177e4SLinus Torvalds if (chipnum == cfi->numchips) 13831da177e4SLinus Torvalds return 0; 13841da177e4SLinus Torvalds } 13851da177e4SLinus Torvalds } 13861da177e4SLinus Torvalds 13871da177e4SLinus Torvalds /* Write buffer is worth it only if more than one word to write... */ 13881da177e4SLinus Torvalds while (len >= map_bankwidth(map) * 2) { 13891da177e4SLinus Torvalds /* We must not cross write block boundaries */ 13901da177e4SLinus Torvalds int size = wbufsize - (ofs & (wbufsize-1)); 13911da177e4SLinus Torvalds 13921da177e4SLinus Torvalds if (size > len) 13931da177e4SLinus Torvalds size = len; 13941da177e4SLinus Torvalds if (size % map_bankwidth(map)) 13951da177e4SLinus Torvalds size -= size % map_bankwidth(map); 13961da177e4SLinus Torvalds 13971da177e4SLinus Torvalds ret = do_write_buffer(map, &cfi->chips[chipnum], 13981da177e4SLinus Torvalds ofs, buf, size); 13991da177e4SLinus Torvalds if (ret) 14001da177e4SLinus Torvalds return ret; 14011da177e4SLinus Torvalds 14021da177e4SLinus Torvalds ofs += size; 14031da177e4SLinus Torvalds buf += size; 14041da177e4SLinus Torvalds (*retlen) += size; 14051da177e4SLinus Torvalds len -= size; 14061da177e4SLinus Torvalds 14071da177e4SLinus Torvalds if (ofs >> cfi->chipshift) { 14081da177e4SLinus Torvalds chipnum ++; 14091da177e4SLinus Torvalds ofs = 0; 14101da177e4SLinus Torvalds if (chipnum == cfi->numchips) 14111da177e4SLinus Torvalds return 0; 14121da177e4SLinus Torvalds } 14131da177e4SLinus Torvalds } 14141da177e4SLinus Torvalds 14151da177e4SLinus Torvalds if (len) { 14161da177e4SLinus Torvalds size_t retlen_dregs = 0; 14171da177e4SLinus Torvalds 14181da177e4SLinus Torvalds ret = cfi_amdstd_write_words(mtd, ofs + (chipnum<<cfi->chipshift), 14191da177e4SLinus Torvalds len, &retlen_dregs, buf); 14201da177e4SLinus Torvalds 14211da177e4SLinus Torvalds *retlen += retlen_dregs; 14221da177e4SLinus Torvalds return ret; 14231da177e4SLinus Torvalds } 14241da177e4SLinus Torvalds 14251da177e4SLinus Torvalds return 0; 14261da177e4SLinus Torvalds } 14271da177e4SLinus Torvalds 14281da177e4SLinus Torvalds 14291da177e4SLinus Torvalds /* 14301da177e4SLinus Torvalds * Handle devices with one erase region, that only implement 14311da177e4SLinus Torvalds * the chip erase command. 14321da177e4SLinus Torvalds */ 143302b15e34STodd Poynor static int __xipram do_erase_chip(struct map_info *map, struct flchip *chip) 14341da177e4SLinus Torvalds { 14351da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 14361da177e4SLinus Torvalds unsigned long timeo = jiffies + HZ; 14371da177e4SLinus Torvalds unsigned long int adr; 14381da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 14391da177e4SLinus Torvalds int ret = 0; 14401da177e4SLinus Torvalds 14411da177e4SLinus Torvalds adr = cfi->addr_unlock1; 14421da177e4SLinus Torvalds 144302b15e34STodd Poynor spin_lock(chip->mutex); 14441da177e4SLinus Torvalds ret = get_chip(map, chip, adr, FL_WRITING); 14451da177e4SLinus Torvalds if (ret) { 144602b15e34STodd Poynor spin_unlock(chip->mutex); 14471da177e4SLinus Torvalds return ret; 14481da177e4SLinus Torvalds } 14491da177e4SLinus Torvalds 14501da177e4SLinus Torvalds DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): ERASE 0x%.8lx\n", 14511da177e4SLinus Torvalds __func__, chip->start ); 14521da177e4SLinus Torvalds 145302b15e34STodd Poynor XIP_INVAL_CACHED_RANGE(map, adr, map->size); 14541da177e4SLinus Torvalds ENABLE_VPP(map); 145502b15e34STodd Poynor xip_disable(map, chip, adr); 145602b15e34STodd Poynor 14571da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 14581da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 14591da177e4SLinus Torvalds cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 14601da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 14611da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 14621da177e4SLinus Torvalds cfi_send_gen_cmd(0x10, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 14631da177e4SLinus Torvalds 14641da177e4SLinus Torvalds chip->state = FL_ERASING; 14651da177e4SLinus Torvalds chip->erase_suspended = 0; 14661da177e4SLinus Torvalds chip->in_progress_block_addr = adr; 14671da177e4SLinus Torvalds 146802b15e34STodd Poynor INVALIDATE_CACHE_UDELAY(map, chip, 146902b15e34STodd Poynor adr, map->size, 147002b15e34STodd Poynor chip->erase_time*500); 14711da177e4SLinus Torvalds 14721da177e4SLinus Torvalds timeo = jiffies + (HZ*20); 14731da177e4SLinus Torvalds 14741da177e4SLinus Torvalds for (;;) { 14751da177e4SLinus Torvalds if (chip->state != FL_ERASING) { 14761da177e4SLinus Torvalds /* Someone's suspended the erase. Sleep */ 14771da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 14781da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 147902b15e34STodd Poynor spin_unlock(chip->mutex); 14801da177e4SLinus Torvalds schedule(); 14811da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 148202b15e34STodd Poynor spin_lock(chip->mutex); 14831da177e4SLinus Torvalds continue; 14841da177e4SLinus Torvalds } 14851da177e4SLinus Torvalds if (chip->erase_suspended) { 14861da177e4SLinus Torvalds /* This erase was suspended and resumed. 14871da177e4SLinus Torvalds Adjust the timeout */ 14881da177e4SLinus Torvalds timeo = jiffies + (HZ*20); /* FIXME */ 14891da177e4SLinus Torvalds chip->erase_suspended = 0; 14901da177e4SLinus Torvalds } 14911da177e4SLinus Torvalds 14921da177e4SLinus Torvalds if (chip_ready(map, adr)) 14931da177e4SLinus Torvalds break; 14941da177e4SLinus Torvalds 1495fb4a90bfSEric W. Biedermann if (time_after(jiffies, timeo)) { 1496fb4a90bfSEric W. Biedermann printk(KERN_WARNING "MTD %s(): software timeout\n", 1497fb4a90bfSEric W. Biedermann __func__ ); 1498fb4a90bfSEric W. Biedermann break; 1499fb4a90bfSEric W. Biedermann } 1500fb4a90bfSEric W. Biedermann 15011da177e4SLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 150202b15e34STodd Poynor UDELAY(map, chip, adr, 1000000/HZ); 15031da177e4SLinus Torvalds } 1504fb4a90bfSEric W. Biedermann /* Did we succeed? */ 1505fb4a90bfSEric W. Biedermann if (!chip_good(map, adr, map_word_ff(map))) { 15061da177e4SLinus Torvalds /* reset on all failures. */ 15071da177e4SLinus Torvalds map_write( map, CMD(0xF0), chip->start ); 15081da177e4SLinus Torvalds /* FIXME - should have reset delay before continuing */ 15091da177e4SLinus Torvalds 15101da177e4SLinus Torvalds ret = -EIO; 1511fb4a90bfSEric W. Biedermann } 1512fb4a90bfSEric W. Biedermann 15131da177e4SLinus Torvalds chip->state = FL_READY; 151402b15e34STodd Poynor xip_enable(map, chip, adr); 15151da177e4SLinus Torvalds put_chip(map, chip, adr); 151602b15e34STodd Poynor spin_unlock(chip->mutex); 15171da177e4SLinus Torvalds 15181da177e4SLinus Torvalds return ret; 15191da177e4SLinus Torvalds } 15201da177e4SLinus Torvalds 15211da177e4SLinus Torvalds 152202b15e34STodd Poynor static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr, int len, void *thunk) 15231da177e4SLinus Torvalds { 15241da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 15251da177e4SLinus Torvalds unsigned long timeo = jiffies + HZ; 15261da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 15271da177e4SLinus Torvalds int ret = 0; 15281da177e4SLinus Torvalds 15291da177e4SLinus Torvalds adr += chip->start; 15301da177e4SLinus Torvalds 153102b15e34STodd Poynor spin_lock(chip->mutex); 15321da177e4SLinus Torvalds ret = get_chip(map, chip, adr, FL_ERASING); 15331da177e4SLinus Torvalds if (ret) { 153402b15e34STodd Poynor spin_unlock(chip->mutex); 15351da177e4SLinus Torvalds return ret; 15361da177e4SLinus Torvalds } 15371da177e4SLinus Torvalds 15381da177e4SLinus Torvalds DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): ERASE 0x%.8lx\n", 15391da177e4SLinus Torvalds __func__, adr ); 15401da177e4SLinus Torvalds 154102b15e34STodd Poynor XIP_INVAL_CACHED_RANGE(map, adr, len); 15421da177e4SLinus Torvalds ENABLE_VPP(map); 154302b15e34STodd Poynor xip_disable(map, chip, adr); 154402b15e34STodd Poynor 15451da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 15461da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 15471da177e4SLinus Torvalds cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 15481da177e4SLinus Torvalds cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); 15491da177e4SLinus Torvalds cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); 15501da177e4SLinus Torvalds map_write(map, CMD(0x30), adr); 15511da177e4SLinus Torvalds 15521da177e4SLinus Torvalds chip->state = FL_ERASING; 15531da177e4SLinus Torvalds chip->erase_suspended = 0; 15541da177e4SLinus Torvalds chip->in_progress_block_addr = adr; 15551da177e4SLinus Torvalds 155602b15e34STodd Poynor INVALIDATE_CACHE_UDELAY(map, chip, 155702b15e34STodd Poynor adr, len, 155802b15e34STodd Poynor chip->erase_time*500); 15591da177e4SLinus Torvalds 15601da177e4SLinus Torvalds timeo = jiffies + (HZ*20); 15611da177e4SLinus Torvalds 15621da177e4SLinus Torvalds for (;;) { 15631da177e4SLinus Torvalds if (chip->state != FL_ERASING) { 15641da177e4SLinus Torvalds /* Someone's suspended the erase. Sleep */ 15651da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 15661da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 156702b15e34STodd Poynor spin_unlock(chip->mutex); 15681da177e4SLinus Torvalds schedule(); 15691da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 157002b15e34STodd Poynor spin_lock(chip->mutex); 15711da177e4SLinus Torvalds continue; 15721da177e4SLinus Torvalds } 15731da177e4SLinus Torvalds if (chip->erase_suspended) { 15741da177e4SLinus Torvalds /* This erase was suspended and resumed. 15751da177e4SLinus Torvalds Adjust the timeout */ 15761da177e4SLinus Torvalds timeo = jiffies + (HZ*20); /* FIXME */ 15771da177e4SLinus Torvalds chip->erase_suspended = 0; 15781da177e4SLinus Torvalds } 15791da177e4SLinus Torvalds 158002b15e34STodd Poynor if (chip_ready(map, adr)) { 158102b15e34STodd Poynor xip_enable(map, chip, adr); 15821da177e4SLinus Torvalds break; 158302b15e34STodd Poynor } 15841da177e4SLinus Torvalds 1585fb4a90bfSEric W. Biedermann if (time_after(jiffies, timeo)) { 158602b15e34STodd Poynor xip_enable(map, chip, adr); 1587fb4a90bfSEric W. Biedermann printk(KERN_WARNING "MTD %s(): software timeout\n", 1588fb4a90bfSEric W. Biedermann __func__ ); 1589fb4a90bfSEric W. Biedermann break; 1590fb4a90bfSEric W. Biedermann } 1591fb4a90bfSEric W. Biedermann 15921da177e4SLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 159302b15e34STodd Poynor UDELAY(map, chip, adr, 1000000/HZ); 15941da177e4SLinus Torvalds } 1595fb4a90bfSEric W. Biedermann /* Did we succeed? */ 159622fd9a87SThomas Gleixner if (!chip_good(map, adr, map_word_ff(map))) { 15971da177e4SLinus Torvalds /* reset on all failures. */ 15981da177e4SLinus Torvalds map_write( map, CMD(0xF0), chip->start ); 15991da177e4SLinus Torvalds /* FIXME - should have reset delay before continuing */ 16001da177e4SLinus Torvalds 16011da177e4SLinus Torvalds ret = -EIO; 1602fb4a90bfSEric W. Biedermann } 1603fb4a90bfSEric W. Biedermann 16041da177e4SLinus Torvalds chip->state = FL_READY; 16051da177e4SLinus Torvalds put_chip(map, chip, adr); 160602b15e34STodd Poynor spin_unlock(chip->mutex); 16071da177e4SLinus Torvalds return ret; 16081da177e4SLinus Torvalds } 16091da177e4SLinus Torvalds 16101da177e4SLinus Torvalds 16111da177e4SLinus Torvalds int cfi_amdstd_erase_varsize(struct mtd_info *mtd, struct erase_info *instr) 16121da177e4SLinus Torvalds { 16131da177e4SLinus Torvalds unsigned long ofs, len; 16141da177e4SLinus Torvalds int ret; 16151da177e4SLinus Torvalds 16161da177e4SLinus Torvalds ofs = instr->addr; 16171da177e4SLinus Torvalds len = instr->len; 16181da177e4SLinus Torvalds 16191da177e4SLinus Torvalds ret = cfi_varsize_frob(mtd, do_erase_oneblock, ofs, len, NULL); 16201da177e4SLinus Torvalds if (ret) 16211da177e4SLinus Torvalds return ret; 16221da177e4SLinus Torvalds 16231da177e4SLinus Torvalds instr->state = MTD_ERASE_DONE; 16241da177e4SLinus Torvalds mtd_erase_callback(instr); 16251da177e4SLinus Torvalds 16261da177e4SLinus Torvalds return 0; 16271da177e4SLinus Torvalds } 16281da177e4SLinus Torvalds 16291da177e4SLinus Torvalds 16301da177e4SLinus Torvalds static int cfi_amdstd_erase_chip(struct mtd_info *mtd, struct erase_info *instr) 16311da177e4SLinus Torvalds { 16321da177e4SLinus Torvalds struct map_info *map = mtd->priv; 16331da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 16341da177e4SLinus Torvalds int ret = 0; 16351da177e4SLinus Torvalds 16361da177e4SLinus Torvalds if (instr->addr != 0) 16371da177e4SLinus Torvalds return -EINVAL; 16381da177e4SLinus Torvalds 16391da177e4SLinus Torvalds if (instr->len != mtd->size) 16401da177e4SLinus Torvalds return -EINVAL; 16411da177e4SLinus Torvalds 16421da177e4SLinus Torvalds ret = do_erase_chip(map, &cfi->chips[0]); 16431da177e4SLinus Torvalds if (ret) 16441da177e4SLinus Torvalds return ret; 16451da177e4SLinus Torvalds 16461da177e4SLinus Torvalds instr->state = MTD_ERASE_DONE; 16471da177e4SLinus Torvalds mtd_erase_callback(instr); 16481da177e4SLinus Torvalds 16491da177e4SLinus Torvalds return 0; 16501da177e4SLinus Torvalds } 16511da177e4SLinus Torvalds 16520165508cSHaavard Skinnemoen static int do_atmel_lock(struct map_info *map, struct flchip *chip, 16530165508cSHaavard Skinnemoen unsigned long adr, int len, void *thunk) 16540165508cSHaavard Skinnemoen { 16550165508cSHaavard Skinnemoen struct cfi_private *cfi = map->fldrv_priv; 16560165508cSHaavard Skinnemoen int ret; 16570165508cSHaavard Skinnemoen 16580165508cSHaavard Skinnemoen spin_lock(chip->mutex); 16590165508cSHaavard Skinnemoen ret = get_chip(map, chip, adr + chip->start, FL_LOCKING); 16600165508cSHaavard Skinnemoen if (ret) 16610165508cSHaavard Skinnemoen goto out_unlock; 16620165508cSHaavard Skinnemoen chip->state = FL_LOCKING; 16630165508cSHaavard Skinnemoen 16640165508cSHaavard Skinnemoen DEBUG(MTD_DEBUG_LEVEL3, "MTD %s(): LOCK 0x%08lx len %d\n", 16650165508cSHaavard Skinnemoen __func__, adr, len); 16660165508cSHaavard Skinnemoen 16670165508cSHaavard Skinnemoen cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, 16680165508cSHaavard Skinnemoen cfi->device_type, NULL); 16690165508cSHaavard Skinnemoen cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, 16700165508cSHaavard Skinnemoen cfi->device_type, NULL); 16710165508cSHaavard Skinnemoen cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, 16720165508cSHaavard Skinnemoen cfi->device_type, NULL); 16730165508cSHaavard Skinnemoen cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, 16740165508cSHaavard Skinnemoen cfi->device_type, NULL); 16750165508cSHaavard Skinnemoen cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, 16760165508cSHaavard Skinnemoen cfi->device_type, NULL); 16770165508cSHaavard Skinnemoen map_write(map, CMD(0x40), chip->start + adr); 16780165508cSHaavard Skinnemoen 16790165508cSHaavard Skinnemoen chip->state = FL_READY; 16800165508cSHaavard Skinnemoen put_chip(map, chip, adr + chip->start); 16810165508cSHaavard Skinnemoen ret = 0; 16820165508cSHaavard Skinnemoen 16830165508cSHaavard Skinnemoen out_unlock: 16840165508cSHaavard Skinnemoen spin_unlock(chip->mutex); 16850165508cSHaavard Skinnemoen return ret; 16860165508cSHaavard Skinnemoen } 16870165508cSHaavard Skinnemoen 16880165508cSHaavard Skinnemoen static int do_atmel_unlock(struct map_info *map, struct flchip *chip, 16890165508cSHaavard Skinnemoen unsigned long adr, int len, void *thunk) 16900165508cSHaavard Skinnemoen { 16910165508cSHaavard Skinnemoen struct cfi_private *cfi = map->fldrv_priv; 16920165508cSHaavard Skinnemoen int ret; 16930165508cSHaavard Skinnemoen 16940165508cSHaavard Skinnemoen spin_lock(chip->mutex); 16950165508cSHaavard Skinnemoen ret = get_chip(map, chip, adr + chip->start, FL_UNLOCKING); 16960165508cSHaavard Skinnemoen if (ret) 16970165508cSHaavard Skinnemoen goto out_unlock; 16980165508cSHaavard Skinnemoen chip->state = FL_UNLOCKING; 16990165508cSHaavard Skinnemoen 17000165508cSHaavard Skinnemoen DEBUG(MTD_DEBUG_LEVEL3, "MTD %s(): LOCK 0x%08lx len %d\n", 17010165508cSHaavard Skinnemoen __func__, adr, len); 17020165508cSHaavard Skinnemoen 17030165508cSHaavard Skinnemoen cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, 17040165508cSHaavard Skinnemoen cfi->device_type, NULL); 17050165508cSHaavard Skinnemoen map_write(map, CMD(0x70), adr); 17060165508cSHaavard Skinnemoen 17070165508cSHaavard Skinnemoen chip->state = FL_READY; 17080165508cSHaavard Skinnemoen put_chip(map, chip, adr + chip->start); 17090165508cSHaavard Skinnemoen ret = 0; 17100165508cSHaavard Skinnemoen 17110165508cSHaavard Skinnemoen out_unlock: 17120165508cSHaavard Skinnemoen spin_unlock(chip->mutex); 17130165508cSHaavard Skinnemoen return ret; 17140165508cSHaavard Skinnemoen } 17150165508cSHaavard Skinnemoen 17160165508cSHaavard Skinnemoen static int cfi_atmel_lock(struct mtd_info *mtd, loff_t ofs, size_t len) 17170165508cSHaavard Skinnemoen { 17180165508cSHaavard Skinnemoen return cfi_varsize_frob(mtd, do_atmel_lock, ofs, len, NULL); 17190165508cSHaavard Skinnemoen } 17200165508cSHaavard Skinnemoen 17210165508cSHaavard Skinnemoen static int cfi_atmel_unlock(struct mtd_info *mtd, loff_t ofs, size_t len) 17220165508cSHaavard Skinnemoen { 17230165508cSHaavard Skinnemoen return cfi_varsize_frob(mtd, do_atmel_unlock, ofs, len, NULL); 17240165508cSHaavard Skinnemoen } 17250165508cSHaavard Skinnemoen 17261da177e4SLinus Torvalds 17271da177e4SLinus Torvalds static void cfi_amdstd_sync (struct mtd_info *mtd) 17281da177e4SLinus Torvalds { 17291da177e4SLinus Torvalds struct map_info *map = mtd->priv; 17301da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 17311da177e4SLinus Torvalds int i; 17321da177e4SLinus Torvalds struct flchip *chip; 17331da177e4SLinus Torvalds int ret = 0; 17341da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait, current); 17351da177e4SLinus Torvalds 17361da177e4SLinus Torvalds for (i=0; !ret && i<cfi->numchips; i++) { 17371da177e4SLinus Torvalds chip = &cfi->chips[i]; 17381da177e4SLinus Torvalds 17391da177e4SLinus Torvalds retry: 174002b15e34STodd Poynor spin_lock(chip->mutex); 17411da177e4SLinus Torvalds 17421da177e4SLinus Torvalds switch(chip->state) { 17431da177e4SLinus Torvalds case FL_READY: 17441da177e4SLinus Torvalds case FL_STATUS: 17451da177e4SLinus Torvalds case FL_CFI_QUERY: 17461da177e4SLinus Torvalds case FL_JEDEC_QUERY: 17471da177e4SLinus Torvalds chip->oldstate = chip->state; 17481da177e4SLinus Torvalds chip->state = FL_SYNCING; 17491da177e4SLinus Torvalds /* No need to wake_up() on this state change - 17501da177e4SLinus Torvalds * as the whole point is that nobody can do anything 17511da177e4SLinus Torvalds * with the chip now anyway. 17521da177e4SLinus Torvalds */ 17531da177e4SLinus Torvalds case FL_SYNCING: 175402b15e34STodd Poynor spin_unlock(chip->mutex); 17551da177e4SLinus Torvalds break; 17561da177e4SLinus Torvalds 17571da177e4SLinus Torvalds default: 17581da177e4SLinus Torvalds /* Not an idle state */ 17591da177e4SLinus Torvalds add_wait_queue(&chip->wq, &wait); 17601da177e4SLinus Torvalds 176102b15e34STodd Poynor spin_unlock(chip->mutex); 17621da177e4SLinus Torvalds 17631da177e4SLinus Torvalds schedule(); 17641da177e4SLinus Torvalds 17651da177e4SLinus Torvalds remove_wait_queue(&chip->wq, &wait); 17661da177e4SLinus Torvalds 17671da177e4SLinus Torvalds goto retry; 17681da177e4SLinus Torvalds } 17691da177e4SLinus Torvalds } 17701da177e4SLinus Torvalds 17711da177e4SLinus Torvalds /* Unlock the chips again */ 17721da177e4SLinus Torvalds 17731da177e4SLinus Torvalds for (i--; i >=0; i--) { 17741da177e4SLinus Torvalds chip = &cfi->chips[i]; 17751da177e4SLinus Torvalds 177602b15e34STodd Poynor spin_lock(chip->mutex); 17771da177e4SLinus Torvalds 17781da177e4SLinus Torvalds if (chip->state == FL_SYNCING) { 17791da177e4SLinus Torvalds chip->state = chip->oldstate; 17801da177e4SLinus Torvalds wake_up(&chip->wq); 17811da177e4SLinus Torvalds } 178202b15e34STodd Poynor spin_unlock(chip->mutex); 17831da177e4SLinus Torvalds } 17841da177e4SLinus Torvalds } 17851da177e4SLinus Torvalds 17861da177e4SLinus Torvalds 17871da177e4SLinus Torvalds static int cfi_amdstd_suspend(struct mtd_info *mtd) 17881da177e4SLinus Torvalds { 17891da177e4SLinus Torvalds struct map_info *map = mtd->priv; 17901da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 17911da177e4SLinus Torvalds int i; 17921da177e4SLinus Torvalds struct flchip *chip; 17931da177e4SLinus Torvalds int ret = 0; 17941da177e4SLinus Torvalds 17951da177e4SLinus Torvalds for (i=0; !ret && i<cfi->numchips; i++) { 17961da177e4SLinus Torvalds chip = &cfi->chips[i]; 17971da177e4SLinus Torvalds 179802b15e34STodd Poynor spin_lock(chip->mutex); 17991da177e4SLinus Torvalds 18001da177e4SLinus Torvalds switch(chip->state) { 18011da177e4SLinus Torvalds case FL_READY: 18021da177e4SLinus Torvalds case FL_STATUS: 18031da177e4SLinus Torvalds case FL_CFI_QUERY: 18041da177e4SLinus Torvalds case FL_JEDEC_QUERY: 18051da177e4SLinus Torvalds chip->oldstate = chip->state; 18061da177e4SLinus Torvalds chip->state = FL_PM_SUSPENDED; 18071da177e4SLinus Torvalds /* No need to wake_up() on this state change - 18081da177e4SLinus Torvalds * as the whole point is that nobody can do anything 18091da177e4SLinus Torvalds * with the chip now anyway. 18101da177e4SLinus Torvalds */ 18111da177e4SLinus Torvalds case FL_PM_SUSPENDED: 18121da177e4SLinus Torvalds break; 18131da177e4SLinus Torvalds 18141da177e4SLinus Torvalds default: 18151da177e4SLinus Torvalds ret = -EAGAIN; 18161da177e4SLinus Torvalds break; 18171da177e4SLinus Torvalds } 181802b15e34STodd Poynor spin_unlock(chip->mutex); 18191da177e4SLinus Torvalds } 18201da177e4SLinus Torvalds 18211da177e4SLinus Torvalds /* Unlock the chips again */ 18221da177e4SLinus Torvalds 18231da177e4SLinus Torvalds if (ret) { 18241da177e4SLinus Torvalds for (i--; i >=0; i--) { 18251da177e4SLinus Torvalds chip = &cfi->chips[i]; 18261da177e4SLinus Torvalds 182702b15e34STodd Poynor spin_lock(chip->mutex); 18281da177e4SLinus Torvalds 18291da177e4SLinus Torvalds if (chip->state == FL_PM_SUSPENDED) { 18301da177e4SLinus Torvalds chip->state = chip->oldstate; 18311da177e4SLinus Torvalds wake_up(&chip->wq); 18321da177e4SLinus Torvalds } 183302b15e34STodd Poynor spin_unlock(chip->mutex); 18341da177e4SLinus Torvalds } 18351da177e4SLinus Torvalds } 18361da177e4SLinus Torvalds 18371da177e4SLinus Torvalds return ret; 18381da177e4SLinus Torvalds } 18391da177e4SLinus Torvalds 18401da177e4SLinus Torvalds 18411da177e4SLinus Torvalds static void cfi_amdstd_resume(struct mtd_info *mtd) 18421da177e4SLinus Torvalds { 18431da177e4SLinus Torvalds struct map_info *map = mtd->priv; 18441da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 18451da177e4SLinus Torvalds int i; 18461da177e4SLinus Torvalds struct flchip *chip; 18471da177e4SLinus Torvalds 18481da177e4SLinus Torvalds for (i=0; i<cfi->numchips; i++) { 18491da177e4SLinus Torvalds 18501da177e4SLinus Torvalds chip = &cfi->chips[i]; 18511da177e4SLinus Torvalds 185202b15e34STodd Poynor spin_lock(chip->mutex); 18531da177e4SLinus Torvalds 18541da177e4SLinus Torvalds if (chip->state == FL_PM_SUSPENDED) { 18551da177e4SLinus Torvalds chip->state = FL_READY; 18561da177e4SLinus Torvalds map_write(map, CMD(0xF0), chip->start); 18571da177e4SLinus Torvalds wake_up(&chip->wq); 18581da177e4SLinus Torvalds } 18591da177e4SLinus Torvalds else 18601da177e4SLinus Torvalds printk(KERN_ERR "Argh. Chip not in PM_SUSPENDED state upon resume()\n"); 18611da177e4SLinus Torvalds 186202b15e34STodd Poynor spin_unlock(chip->mutex); 18631da177e4SLinus Torvalds } 18641da177e4SLinus Torvalds } 18651da177e4SLinus Torvalds 18661da177e4SLinus Torvalds static void cfi_amdstd_destroy(struct mtd_info *mtd) 18671da177e4SLinus Torvalds { 18681da177e4SLinus Torvalds struct map_info *map = mtd->priv; 18691da177e4SLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 1870fa671646SJesper Juhl 18711da177e4SLinus Torvalds kfree(cfi->cmdset_priv); 18721da177e4SLinus Torvalds kfree(cfi->cfiq); 18731da177e4SLinus Torvalds kfree(cfi); 18741da177e4SLinus Torvalds kfree(mtd->eraseregions); 18751da177e4SLinus Torvalds } 18761da177e4SLinus Torvalds 18771da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 18781da177e4SLinus Torvalds MODULE_AUTHOR("Crossnet Co. <info@crossnet.co.jp> et al."); 18791da177e4SLinus Torvalds MODULE_DESCRIPTION("MTD chip driver for AMD/Fujitsu flash chips"); 1880