diff options
Diffstat (limited to 'drivers/mtd/chips')
| -rw-r--r-- | drivers/mtd/chips/Kconfig | 40 | ||||
| -rw-r--r-- | drivers/mtd/chips/Makefile | 4 | ||||
| -rw-r--r-- | drivers/mtd/chips/amd_flash.c | 1396 | ||||
| -rw-r--r-- | drivers/mtd/chips/jedec.c | 935 | ||||
| -rw-r--r-- | drivers/mtd/chips/sharp.c | 601 |
5 files changed, 0 insertions, 2976 deletions
diff --git a/drivers/mtd/chips/Kconfig b/drivers/mtd/chips/Kconfig index d28e0fc85e1..479d32b57a1 100644 --- a/drivers/mtd/chips/Kconfig +++ b/drivers/mtd/chips/Kconfig @@ -1,5 +1,4 @@ # drivers/mtd/chips/Kconfig -# $Id: Kconfig,v 1.18 2005/11/07 11:14:22 gleixner Exp $ menu "RAM/ROM/Flash chip drivers" depends on MTD!=n @@ -231,45 +230,6 @@ config MTD_ABSENT the system regardless of media presence. Device nodes created with this driver will return -ENODEV upon access. -config MTD_OBSOLETE_CHIPS - bool "Older (theoretically obsoleted now) drivers for non-CFI chips" - help - This option does not enable any code directly, but will allow you to - select some other chip drivers which are now considered obsolete, - because the generic CONFIG_JEDECPROBE code above should now detect - the chips which are supported by these drivers, and allow the generic - CFI-compatible drivers to drive the chips. Say 'N' here unless you have - already tried the CONFIG_JEDECPROBE method and reported its failure - to the MTD mailing list at <linux-mtd@lists.infradead.org> - -config MTD_AMDSTD - tristate "AMD compatible flash chip support (non-CFI)" - depends on MTD_OBSOLETE_CHIPS && BROKEN - help - This option enables support for flash chips using AMD-compatible - commands, including some which are not CFI-compatible and hence - cannot be used with the CONFIG_MTD_CFI_AMDSTD option. - - It also works on AMD compatible chips that do conform to CFI. - -config MTD_SHARP - tristate "pre-CFI Sharp chip support" - depends on MTD_OBSOLETE_CHIPS - help - This option enables support for flash chips using Sharp-compatible - commands, including some which are not CFI-compatible and hence - cannot be used with the CONFIG_MTD_CFI_INTELxxx options. - -config MTD_JEDEC - tristate "JEDEC device support" - depends on MTD_OBSOLETE_CHIPS && BROKEN - help - Enable older JEDEC flash interface devices for self - programming flash. It is commonly used in older AMD chips. It is - only called JEDEC because the JEDEC association - <http://www.jedec.org/> distributes the identification codes for the - chips. - config MTD_XIP bool "XIP aware MTD support" depends on !SMP && (MTD_CFI_INTELEXT || MTD_CFI_AMDSTD) && EXPERIMENTAL && ARCH_MTD_XIP diff --git a/drivers/mtd/chips/Makefile b/drivers/mtd/chips/Makefile index 75bc1c2a0f4..36582412ccd 100644 --- a/drivers/mtd/chips/Makefile +++ b/drivers/mtd/chips/Makefile @@ -1,19 +1,15 @@ # # linux/drivers/chips/Makefile # -# $Id: Makefile.common,v 1.5 2005/11/07 11:14:22 gleixner Exp $ obj-$(CONFIG_MTD) += chipreg.o -obj-$(CONFIG_MTD_AMDSTD) += amd_flash.o obj-$(CONFIG_MTD_CFI) += cfi_probe.o obj-$(CONFIG_MTD_CFI_UTIL) += cfi_util.o obj-$(CONFIG_MTD_CFI_STAA) += cfi_cmdset_0020.o obj-$(CONFIG_MTD_CFI_AMDSTD) += cfi_cmdset_0002.o obj-$(CONFIG_MTD_CFI_INTELEXT) += cfi_cmdset_0001.o obj-$(CONFIG_MTD_GEN_PROBE) += gen_probe.o -obj-$(CONFIG_MTD_JEDEC) += jedec.o obj-$(CONFIG_MTD_JEDECPROBE) += jedec_probe.o obj-$(CONFIG_MTD_RAM) += map_ram.o obj-$(CONFIG_MTD_ROM) += map_rom.o -obj-$(CONFIG_MTD_SHARP) += sharp.o obj-$(CONFIG_MTD_ABSENT) += map_absent.o diff --git a/drivers/mtd/chips/amd_flash.c b/drivers/mtd/chips/amd_flash.c deleted file mode 100644 index e7999f15d85..00000000000 --- a/drivers/mtd/chips/amd_flash.c +++ /dev/null @@ -1,1396 +0,0 @@ -/* - * MTD map driver for AMD compatible flash chips (non-CFI) - * - * Author: Jonas Holmberg <jonas.holmberg@axis.com> - * - * $Id: amd_flash.c,v 1.28 2005/11/07 11:14:22 gleixner Exp $ - * - * Copyright (c) 2001 Axis Communications AB - * - * This file is under GPL. - * - */ - -#include <linux/module.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/errno.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/interrupt.h> -#include <linux/init.h> -#include <linux/mtd/map.h> -#include <linux/mtd/mtd.h> -#include <linux/mtd/flashchip.h> - -/* There's no limit. It exists only to avoid realloc. */ -#define MAX_AMD_CHIPS 8 - -#define DEVICE_TYPE_X8 (8 / 8) -#define DEVICE_TYPE_X16 (16 / 8) -#define DEVICE_TYPE_X32 (32 / 8) - -/* Addresses */ -#define ADDR_MANUFACTURER 0x0000 -#define ADDR_DEVICE_ID 0x0001 -#define ADDR_SECTOR_LOCK 0x0002 -#define ADDR_HANDSHAKE 0x0003 -#define ADDR_UNLOCK_1 0x0555 -#define ADDR_UNLOCK_2 0x02AA - -/* Commands */ -#define CMD_UNLOCK_DATA_1 0x00AA -#define CMD_UNLOCK_DATA_2 0x0055 -#define CMD_MANUFACTURER_UNLOCK_DATA 0x0090 -#define CMD_UNLOCK_BYPASS_MODE 0x0020 -#define CMD_PROGRAM_UNLOCK_DATA 0x00A0 -#define CMD_RESET_DATA 0x00F0 -#define CMD_SECTOR_ERASE_UNLOCK_DATA 0x0080 -#define CMD_SECTOR_ERASE_UNLOCK_DATA_2 0x0030 - -#define CMD_UNLOCK_SECTOR 0x0060 - -/* Manufacturers */ -#define MANUFACTURER_AMD 0x0001 -#define MANUFACTURER_ATMEL 0x001F -#define MANUFACTURER_FUJITSU 0x0004 -#define MANUFACTURER_ST 0x0020 -#define MANUFACTURER_SST 0x00BF -#define MANUFACTURER_TOSHIBA 0x0098 - -/* AMD */ -#define AM29F800BB 0x2258 -#define AM29F800BT 0x22D6 -#define AM29LV800BB 0x225B -#define AM29LV800BT 0x22DA -#define AM29LV160DT 0x22C4 -#define AM29LV160DB 0x2249 -#define AM29BDS323D 0x22D1 - -/* Atmel */ -#define AT49xV16x 0x00C0 -#define AT49xV16xT 0x00C2 - -/* Fujitsu */ -#define MBM29LV160TE 0x22C4 -#define MBM29LV160BE 0x2249 -#define MBM29LV800BB 0x225B - -/* ST - www.st.com */ -#define M29W800T 0x00D7 -#define M29W160DT 0x22C4 -#define M29W160DB 0x2249 - -/* SST */ -#define SST39LF800 0x2781 -#define SST39LF160 0x2782 - -/* Toshiba */ -#define TC58FVT160 0x00C2 -#define TC58FVB160 0x0043 - -#define D6_MASK 0x40 - -struct amd_flash_private { - int device_type; - int interleave; - int numchips; - unsigned long chipshift; - struct flchip chips[0]; -}; - -struct amd_flash_info { - const __u16 mfr_id; - const __u16 dev_id; - const char *name; - const u_long size; - const int numeraseregions; - const struct mtd_erase_region_info regions[4]; -}; - - - -static int amd_flash_read(struct mtd_info *, loff_t, size_t, size_t *, - u_char *); -static int amd_flash_write(struct mtd_info *, loff_t, size_t, size_t *, - const u_char *); -static int amd_flash_erase(struct mtd_info *, struct erase_info *); -static void amd_flash_sync(struct mtd_info *); -static int amd_flash_suspend(struct mtd_info *); -static void amd_flash_resume(struct mtd_info *); -static void amd_flash_destroy(struct mtd_info *); -static struct mtd_info *amd_flash_probe(struct map_info *map); - - -static struct mtd_chip_driver amd_flash_chipdrv = { - .probe = amd_flash_probe, - .destroy = amd_flash_destroy, - .name = "amd_flash", - .module = THIS_MODULE -}; - -static inline __u32 wide_read(struct map_info *map, __u32 addr) -{ - if (map->buswidth == 1) { - return map_read8(map, addr); - } else if (map->buswidth == 2) { - return map_read16(map, addr); - } else if (map->buswidth == 4) { - return map_read32(map, addr); - } - - return 0; -} - -static inline void wide_write(struct map_info *map, __u32 val, __u32 addr) -{ - if (map->buswidth == 1) { - map_write8(map, val, addr); - } else if (map->buswidth == 2) { - map_write16(map, val, addr); - } else if (map->buswidth == 4) { - map_write32(map, val, addr); - } -} - -static inline __u32 make_cmd(struct map_info *map, __u32 cmd) -{ - const struct amd_flash_private *private = map->fldrv_priv; - if ((private->interleave == 2) && - (private->device_type == DEVICE_TYPE_X16)) { - cmd |= (cmd << 16); - } - - return cmd; -} - -static inline void send_unlock(struct map_info *map, unsigned long base) -{ - wide_write(map, (CMD_UNLOCK_DATA_1 << 16) | CMD_UNLOCK_DATA_1, - base + (map->buswidth * ADDR_UNLOCK_1)); - wide_write(map, (CMD_UNLOCK_DATA_2 << 16) | CMD_UNLOCK_DATA_2, - base + (map->buswidth * ADDR_UNLOCK_2)); -} - -static inline void send_cmd(struct map_info *map, unsigned long base, __u32 cmd) -{ - send_unlock(map, base); - wide_write(map, make_cmd(map, cmd), - base + (map->buswidth * ADDR_UNLOCK_1)); -} - -static inline void send_cmd_to_addr(struct map_info *map, unsigned long base, - __u32 cmd, unsigned long addr) -{ - send_unlock(map, base); - wide_write(map, make_cmd(map, cmd), addr); -} - -static inline int flash_is_busy(struct map_info *map, unsigned long addr, - int interleave) -{ - - if ((interleave == 2) && (map->buswidth == 4)) { - __u32 read1, read2; - - read1 = wide_read(map, addr); - read2 = wide_read(map, addr); - - return (((read1 >> 16) & D6_MASK) != - ((read2 >> 16) & D6_MASK)) || - (((read1 & 0xffff) & D6_MASK) != - ((read2 & 0xffff) & D6_MASK)); - } - - return ((wide_read(map, addr) & D6_MASK) != - (wide_read(map, addr) & D6_MASK)); -} - -static inline void unlock_sector(struct map_info *map, unsigned long sect_addr, - int unlock) -{ - /* Sector lock address. A6 = 1 for unlock, A6 = 0 for lock */ - int SLA = unlock ? - (sect_addr | (0x40 * map->buswidth)) : - (sect_addr & ~(0x40 * map->buswidth)) ; - - __u32 cmd = make_cmd(map, CMD_UNLOCK_SECTOR); - - wide_write(map, make_cmd(map, CMD_RESET_DATA), 0); - wide_write(map, cmd, SLA); /* 1st cycle: write cmd to any address */ - wide_write(map, cmd, SLA); /* 2nd cycle: write cmd to any address */ - wide_write(map, cmd, SLA); /* 3rd cycle: write cmd to SLA */ -} - -static inline int is_sector_locked(struct map_info *map, - unsigned long sect_addr) -{ - int status; - - wide_write(map, CMD_RESET_DATA, 0); - send_cmd(map, sect_addr, CMD_MANUFACTURER_UNLOCK_DATA); - - /* status is 0x0000 for unlocked and 0x0001 for locked */ - status = wide_read(map, sect_addr + (map->buswidth * ADDR_SECTOR_LOCK)); - wide_write(map, CMD_RESET_DATA, 0); - return status; -} - -static int amd_flash_do_unlock(struct mtd_info *mtd, loff_t ofs, size_t len, - int is_unlock) -{ - struct map_info *map; - struct mtd_erase_region_info *merip; - int eraseoffset, erasesize, eraseblocks; - int i; - int retval = 0; - int lock_status; - - map = mtd->priv; - - /* Pass the whole chip through sector by sector and check for each - sector if the sector and the given interval overlap */ - for(i = 0; i < mtd->numeraseregions; i++) { - merip = &mtd->eraseregions[i]; - - eraseoffset = merip->offset; - erasesize = merip->erasesize; - eraseblocks = merip->numblocks; - - if (ofs > eraseoffset + erasesize) - continue; - - while (eraseblocks > 0) { - if (ofs < eraseoffset + erasesize && ofs + len > eraseoffset) { - unlock_sector(map, eraseoffset, is_unlock); - - lock_status = is_sector_locked(map, eraseoffset); - - if (is_unlock && lock_status) { - printk("Cannot unlock sector at address %x length %xx\n", - eraseoffset, merip->erasesize); - retval = -1; - } else if (!is_unlock && !lock_status) { - printk("Cannot lock sector at address %x length %x\n", - eraseoffset, merip->erasesize); - retval = -1; - } - } - eraseoffset += erasesize; - eraseblocks --; - } - } - return retval; -} - -static int amd_flash_unlock(struct mtd_info *mtd, loff_t ofs, size_t len) -{ - return amd_flash_do_unlock(mtd, ofs, len, 1); -} - -static int amd_flash_lock(struct mtd_info *mtd, loff_t ofs, size_t len) -{ - return amd_flash_do_unlock(mtd, ofs, len, 0); -} - - -/* - * Reads JEDEC manufacturer ID and device ID and returns the index of the first - * matching table entry (-1 if not found or alias for already found chip). - */ -static int probe_new_chip(struct mtd_info *mtd, __u32 base, - struct flchip *chips, - struct amd_flash_private *private, - const struct amd_flash_info *table, int table_size) -{ - __u32 mfr_id; - __u32 dev_id; - struct map_info *map = mtd->priv; - struct amd_flash_private temp; - int i; - - temp.device_type = DEVICE_TYPE_X16; // Assume X16 (FIXME) - temp.interleave = 2; - map->fldrv_priv = &temp; - - /* Enter autoselect mode. */ - send_cmd(map, base, CMD_RESET_DATA); - send_cmd(map, base, CMD_MANUFACTURER_UNLOCK_DATA); - - mfr_id = wide_read(map, base + (map->buswidth * ADDR_MANUFACTURER)); - dev_id = wide_read(map, base + (map->buswidth * ADDR_DEVICE_ID)); - - if ((map->buswidth == 4) && ((mfr_id >> 16) == (mfr_id & 0xffff)) && - ((dev_id >> 16) == (dev_id & 0xffff))) { - mfr_id &= 0xffff; - dev_id &= 0xffff; - } else { - temp.interleave = 1; - } - - for (i = 0; i < table_size; i++) { - if ((mfr_id == table[i].mfr_id) && - (dev_id == table[i].dev_id)) { - if (chips) { - int j; - - /* Is this an alias for an already found chip? - * In that case that chip should be in - * autoselect mode now. - */ - for (j = 0; j < private->numchips; j++) { - __u32 mfr_id_other; - __u32 dev_id_other; - - mfr_id_other = - wide_read(map, chips[j].start + - (map->buswidth * - ADDR_MANUFACTURER - )); - dev_id_other = - wide_read(map, chips[j].start + - (map->buswidth * - ADDR_DEVICE_ID)); - if (temp.interleave == 2) { - mfr_id_other &= 0xffff; - dev_id_other &= 0xffff; - } - if ((mfr_id_other == mfr_id) && - (dev_id_other == dev_id)) { - - /* Exit autoselect mode. */ - send_cmd(map, base, - CMD_RESET_DATA); - - return -1; - } - } - - if (private->numchips == MAX_AMD_CHIPS) { - printk(KERN_WARNING - "%s: Too many flash chips " - "detected. Increase " - "MAX_AMD_CHIPS from %d.\n", - map->name, MAX_AMD_CHIPS); - - return -1; - } - - chips[private->numchips].start = base; - chips[private->numchips].state = FL_READY; - chips[private->numchips].mutex = - &chips[private->numchips]._spinlock; - private->numchips++; - } - - printk("%s: Found %d x %ldMiB %s at 0x%x\n", map->name, - temp.interleave, (table[i].size)/(1024*1024), - table[i].name, base); - - mtd->size += table[i].size * temp.interleave; - mtd->numeraseregions += table[i].numeraseregions; - - break; - } - } - - /* Exit autoselect mode. */ - send_cmd(map, base, CMD_RESET_DATA); - - if (i == table_size) { - printk(KERN_DEBUG "%s: unknown flash device at 0x%x, " - "mfr id 0x%x, dev id 0x%x\n", map->name, - base, mfr_id, dev_id); - map->fldrv_priv = NULL; - - return -1; - } - - private->device_type = temp.device_type; - private->interleave = temp.interleave; - - return i; -} - - - -static struct mtd_info *amd_flash_probe(struct map_info *map) -{ - static const struct amd_flash_info table[] = { - { - .mfr_id = MANUFACTURER_AMD, - .dev_id = AM29LV160DT, - .name = "AMD AM29LV160DT", - .size = 0x00200000, - .numeraseregions = 4, - .regions = { - { .offset = 0x000000, .erasesize = 0x10000, .numblocks = 31 }, - { .offset = 0x1F0000, .erasesize = 0x08000, .numblocks = 1 }, - { .offset = 0x1F8000, .erasesize = 0x02000, .numblocks = 2 }, - { .offset = 0x1FC000, .erasesize = 0x04000, .numblocks = 1 } - } - }, { - .mfr_id = MANUFACTURER_AMD, - .dev_id = AM29LV160DB, - .name = "AMD AM29LV160DB", - .size = 0x00200000, - .numeraseregions = 4, - .regions = { - { .offset = 0x000000, .erasesize = 0x04000, .numblocks = 1 }, - { .offset = 0x004000, .erasesize = 0x02000, .numblocks = 2 }, - { .offset = 0x008000, .erasesize = 0x08000, .numblocks = 1 }, - { .offset = 0x010000, .erasesize = 0x10000, .numblocks = 31 } - } - }, { - .mfr_id = MANUFACTURER_TOSHIBA, - .dev_id = TC58FVT160, - .name = "Toshiba TC58FVT160", - .size = 0x00200000, - .numeraseregions = 4, - .regions = { - { .offset = 0x000000, .erasesize = 0x10000, .numblocks = 31 }, - { .offset = 0x1F0000, .erasesize = 0x08000, .numblocks = 1 }, - { .offset = 0x1F8000, .erasesize = 0x02000, .numblocks = 2 }, - { .offset = 0x1FC000, .erasesize = 0x04000, .numblocks = 1 } - } - }, { - .mfr_id = MANUFACTURER_FUJITSU, - .dev_id = MBM29LV160TE, - .name = "Fujitsu MBM29LV160TE", - .size = 0x00200000, - .numeraseregions = 4, - .regions = { - { .offset = 0x000000, .erasesize = 0x10000, .numblocks = 31 }, - { .offset = 0x1F0000, .erasesize = 0x08000, .numblocks = 1 }, - { .offset = 0x1F8000, .erasesize = 0x02000, .numblocks = 2 }, - { .offset = 0x1FC000, .erasesize = 0x04000, .numblocks = 1 } - } - }, { - .mfr_id = MANUFACTURER_TOSHIBA, - .dev_id = TC58FVB160, - .name = "Toshiba TC58FVB160", - .size = 0x00200000, - .numeraseregions = 4, - .regions = { - { .offset = 0x000000, .erasesize = 0x04000, .numblocks = 1 }, - { .offset = 0x004000, .erasesize = 0x02000, .numblocks = 2 }, - { .offset = 0x008000, .erasesize = 0x08000, .numblocks = 1 }, - { .offset = 0x010000, .erasesize = 0x10000, .numblocks = 31 } - } - }, { - .mfr_id = MANUFACTURER_FUJITSU, - .dev_id = MBM29LV160BE, - .name = "Fujitsu MBM29LV160BE", - .size = 0x00200000, - .numeraseregions = 4, - .regions = { - { .offset = 0x000000, .erasesize = 0x04000, .numblocks = 1 }, - { .offset = 0x004000, .erasesize = 0x02000, .numblocks = 2 }, - { .offset = 0x008000, .erasesize = 0x08000, .numblocks = 1 }, - { .offset = 0x010000, .erasesize = 0x10000, .numblocks = 31 } - } - }, { - .mfr_id = MANUFACTURER_AMD, - .dev_id = AM29LV800BB, - .name = "AMD AM29LV800BB", - .size = 0x00100000, - .numeraseregions = 4, - .regions = { - { .offset = 0x000000, .erasesize = 0x04000, .numblocks = 1 }, - { .offset = 0x004000, .erasesize = 0x02000, .numblocks = 2 }, - { .offset = 0x008000, .erasesize = 0x08000, .numblocks = 1 }, - { .offset = 0x010000, .erasesize = 0x10000, .numblocks = 15 } - } - }, { - .mfr_id = MANUFACTURER_AMD, - .dev_id = AM29F800BB, - .name = "AMD AM29F800BB", - .size = 0x00100000, - .numeraseregions = 4, - .regions = { - { .offset = 0x000000, .erasesize = 0x04000, .numblocks = 1 }, - { .offset = 0x004000, .erasesize = 0x02000, .numblocks = 2 }, - { .offset = 0x008000, .erasesize = 0x08000, .numblocks = 1 }, - { .offset = 0x010000, .erasesize = 0x10000, .numblocks = 15 } - } - }, { - .mfr_id = MANUFACTURER_AMD, - .dev_id = AM29LV800BT, - .name = "AMD AM29LV800BT", - .size = 0x00100000, - .numeraseregions = 4, - .regions = { - { .offset = 0x000000, .erasesize = 0x10000, .numblocks = 15 }, - { .offset = 0x0F0000, .erasesize = 0x08000, .numblocks = 1 }, - { .offset = 0x0F8000, .erasesize = 0x02000, .numblocks = 2 }, - { .offset = 0x0FC000, .erasesize = 0x04000, .numblocks = 1 } - } - }, { - .mfr_id = MANUFACTURER_AMD, - .dev_id = AM29F800BT, - .name = "AMD AM29F800BT", - .size = 0x00100000, - .numeraseregions = 4, - .regions = { - { .offset = 0x000000, .erasesize = 0x10000, .numblocks = 15 }, - { .offset = 0x0F0000, .erasesize = 0x08000, .numblocks = 1 }, - { .offset = 0x0F8000, .erasesize = 0x02000, .numblocks = 2 }, - { .offset = 0x0FC000, .erasesize = 0x04000, .numblocks = 1 } - } - }, { - .mfr_id = MANUFACTURER_AMD, - .dev_id = AM29LV800BB, - .name = "AMD AM29LV800BB", - .size = 0x00100000, - .numeraseregions = 4, - .regions = { - { .offset = 0x000000, .erasesize = 0x10000, .numblocks = 15 }, - { .offset = 0x0F0000, .erasesize = 0x08000, .numblocks = 1 }, - { .offset = 0x0F8000, .erasesize = 0x02000, .numblocks = 2 }, - { .offset = 0x0FC000, .erasesize = 0x04000, .numblocks = 1 } - } - }, { - .mfr_id = MANUFACTURER_FUJITSU, - .dev_id = MBM29LV800BB, - .name = "Fujitsu MBM29LV800BB", - .size = 0x00100000, - .numeraseregions = 4, - .regions = { - { .offset = 0x000000, .erasesize = 0x04000, .numblocks = 1 }, - { .offset = 0x004000, .erasesize = 0x02000, .numblocks = 2 }, - { .offset = 0x008000, .erasesize = 0x08000, .numblocks = 1 }, - { .offset = 0x010000, .erasesize = 0x10000, .numblocks = 15 } - } - }, { - .mfr_id = MANUFACTURER_ST, - .dev_id = M29W800T, - .name = "ST M29W800T", - .size = 0x00100000, - .numeraseregions = 4, - .regions = { - { .offset = 0x000000, .erasesize = 0x10000, .numblocks = 15 }, - { .offset = 0x0F0000, .erasesize = 0x08000, .numblocks = 1 }, - { .offset = 0x0F8000, .erasesize = 0x02000, .numblocks = 2 }, - { .offset = 0x0FC000, .erasesize = 0x04000, .numblocks = 1 } - } - }, { - .mfr_id = MANUFACTURER_ST, - .dev_id = M29W160DT, - .name = "ST M29W160DT", - .size = 0x00200000, - .numeraseregions = 4, - .regions = { - { .offset = 0x000000, .erasesize = 0x10000, .numblocks = 31 }, - { .offset = 0x1F0000, .erasesize = 0x08000, .numblocks = 1 }, - { .offset = 0x1F8000, .erasesize = 0x02000, .numblocks = 2 }, - { .offset = 0x1FC000, .erasesize = 0x04000, .numblocks = 1 } - } - }, { - .mfr_id = MANUFACTURER_ST, - .dev_id = M29W160DB, - .name = "ST M29W160DB", - .size = 0x00200000, - .numeraseregions = 4, - .regions = { - { .offset = 0x000000, .erasesize = 0x04000, .numblocks = 1 }, - { .offset = 0x004000, .erasesize = 0x02000, .numblocks = 2 }, - { .offset = 0x008000, .erasesize = 0x08000, .numblocks = 1 }, - { .offset = 0x010000, .erasesize = 0x10000, .numblocks = 31 } - } - }, { - .mfr_id = MANUFACTURER_AMD, - .dev_id = AM29BDS323D, - .name = "AMD AM29BDS323D", - .size = 0x00400000, - .numeraseregions = 3, - .regions = { - { .offset = 0x000000, .erasesize = 0x10000, .numblocks = 48 }, - { .offset = 0x300000, .erasesize = 0x10000, .numblocks = 15 }, - { .offset = 0x3f0000, .erasesize = 0x02000, .numblocks = 8 }, - } - }, { - .mfr_id = MANUFACTURER_ATMEL, - .dev_id = AT49xV16x, - .name = "Atmel AT49xV16x", - .size = 0x00200000, - .numeraseregions = 2, - .regions = { - { .offset = 0x000000, .erasesize = 0x02000, .numblocks = 8 }, - { .offset = 0x010000, .erasesize = 0x10000, .numblocks = 31 } - } - }, { - .mfr_id = MANUFACTURER_ATMEL, - .dev_id = AT49xV16xT, - .name = "Atmel AT49xV16xT", - .size = 0x00200000, - .numeraseregions = 2, - .regions = { - { .offset = 0x000000, .erasesize = 0x10000, .numblocks = 31 }, - { .offset = 0x1F0000, .erasesize = 0x02000, .numblocks = 8 } - } - } - }; - - struct mtd_info *mtd; - struct flchip chips[MAX_AMD_CHIPS]; - int table_pos[MAX_AMD_CHIPS]; - struct amd_flash_private temp; - struct amd_flash_private *private; - u_long size; - unsigned long base; - int i; - int reg_idx; - int offset; - - mtd = kzalloc(sizeof(*mtd), GFP_KERNEL); - if (!mtd) { - printk(KERN_WARNING - "%s: kmalloc failed for info structure\n", map->name); - return NULL; - } - mtd->priv = map; - - memset(&temp, 0, sizeof(temp)); - - printk("%s: Probing for AMD compatible flash...\n", map->name); - - if ((table_pos[0] = probe_new_chip(mtd, 0, NULL, &temp, table, - ARRAY_SIZE(table))) - == -1) { - printk(KERN_WARNING - "%s: Found no AMD compatible device at location zero\n", - map->name); - kfree(mtd); - - return NULL; - } - - chips[0].start = 0; - chips[0].state = FL_READY; - chips[0].mutex = &chips[0]._spinlock; - temp.numchips = 1; - for (size = mtd->size; size > 1; size >>= 1) { - temp.chipshift++; - } - switch (temp.interleave) { - case 2: - temp.chipshift += 1; - break; - case 4: - temp.chipshift += 2; - break; - } - - /* Find out if there are any more chips in the map. */ - for (base = (1 << temp.chipshift); - base < map->size; - base += (1 << temp.chipshift)) { - int numchips = temp.numchips; - table_pos[numchips] = probe_new_chip(mtd, base, chips, - &temp, table, ARRAY_SIZE(table)); - } - - mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) * - mtd->numeraseregions, GFP_KERNEL); - if (!mtd->eraseregions) { - printk(KERN_WARNING "%s: Failed to allocate " - "memory for MTD erase region info\n", map->name); - kfree(mtd); - map->fldrv_priv = NULL; - return NULL; - } - - reg_idx = 0; - offset = 0; - for (i = 0; i < temp.numchips; i++) { - int dev_size; - int j; - - dev_size = 0; - for (j = 0; j < table[table_pos[i]].numeraseregions; j++) { - mtd->eraseregions[reg_idx].offset = offset + - (table[table_pos[i]].regions[j].offset * - temp.interleave); - mtd->eraseregions[reg_idx].erasesize = - table[table_pos[i]].regions[j].erasesize * - temp.interleave; - mtd->eraseregions[reg_idx].numblocks = - table[table_pos[i]].regions[j].numblocks; - if (mtd->erasesize < - mtd->eraseregions[reg_idx].erasesize) { - mtd->erasesize = - mtd->eraseregions[reg_idx].erasesize; - } - dev_size += mtd->eraseregions[reg_idx].erasesize * - mtd->eraseregions[reg_idx].numblocks; - reg_idx++; - } - offset += dev_size; - } - mtd->type = MTD_NORFLASH; - mtd->writesize = 1; - mtd->flags = MTD_CAP_NORFLASH; - mtd->name = map->name; - mtd->erase = amd_flash_erase; - mtd->read = amd_flash_read; - mtd->write = amd_flash_write; - mtd->sync = amd_flash_sync; - mtd->suspend = amd_flash_suspend; - mtd->resume = amd_flash_resume; - mtd->lock = amd_flash_lock; - mtd->unlock = amd_flash_unlock; - - private = kmalloc(sizeof(*private) + (sizeof(struct flchip) * - temp.numchips), GFP_KERNEL); - if (!private) { - printk(KERN_WARNING - "%s: kmalloc failed for private structure\n", map->name); - kfree(mtd); - map->fldrv_priv = NULL; - return NULL; - } - memcpy(private, &temp, sizeof(temp)); - memcpy(private->chips, chips, - sizeof(struct flchip) * private->numchips); - for (i = 0; i < private->numchips; i++) { - init_waitqueue_head(&private->chips[i].wq); - spin_lock_init(&private->chips[i]._spinlock); - } - - map->fldrv_priv = private; - - map->fldrv = &amd_flash_chipdrv; - - __module_get(THIS_MODULE); - return mtd; -} - - - -static inline int read_one_chip(struct map_info *map, struct flchip *chip, - loff_t adr, size_t len, u_char *buf) -{ - DECLARE_WAITQUEUE(wait, current); - unsigned long timeo = jiffies + HZ; - -retry: - spin_lock_bh(chip->mutex); - - if (chip->state != FL_READY){ - printk(KERN_INFO "%s: waiting for chip to read, state = %d\n", - map->name, chip->state); - set_current_state(TASK_UNINTERRUPTIBLE); - add_wait_queue(&chip->wq, &wait); - - spin_unlock_bh(chip->mutex); - - schedule(); - remove_wait_queue(&chip->wq, &wait); - - if(signal_pending(current)) { - return -EINTR; - } - - timeo = jiffies + HZ; - - goto retry; - } - - adr += chip->start; - - chip->state = FL_READY; - - map_copy_from(map, buf, adr, len); - - wake_up(&chip->wq); - spin_unlock_bh(chip->mutex); - - return 0; -} - - - -static int amd_flash_read(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, u_char *buf) -{ - struct map_info *map = mtd->priv; - struct amd_flash_private *private = map->fldrv_priv; - unsigned long ofs; - int chipnum; - int ret = 0; - - if ((from + len) > mtd->size) { - printk(KERN_WARNING "%s: read request past end of device " - "(0x%lx)\n", map->name, (unsigned long)from + len); - - return -EINVAL; - } - - /* Offset within the first chip that the first read should start. */ - chipnum = (from >> private->chipshift); - ofs = from - (chipnum << private->chipshift); - - *retlen = 0; - - while (len) { - unsigned long this_len; - - if (chipnum >= private->numchips) { - break; - } - - if ((len + ofs - 1) >> private->chipshift) { - this_len = (1 << private->chipshift) - ofs; - } else { - this_len = len; - } - - ret = read_one_chip(map, &private->chips[chipnum], ofs, - this_len, buf); - if (ret) { - break; - } - - *retlen += this_len; - len -= this_len; - buf += this_len; - - ofs = 0; - chipnum++; - } - - return ret; -} - - - -static int write_one_word(struct map_info *map, struct flchip *chip, - unsigned long adr, __u32 datum) -{ - unsigned long timeo = jiffies + HZ; - struct amd_flash_private *private = map->fldrv_priv; - DECLARE_WAITQUEUE(wait, current); - int ret = 0; - int times_left; - -retry: - spin_lock_bh(chip->mutex); - - if (chip->state != FL_READY){ - printk("%s: waiting for chip to write, state = %d\n", - map->name, chip->state); - set_current_state(TASK_UNINTERRUPTIBLE); - add_wait_queue(&chip->wq, &wait); - - spin_unlock_bh(chip->mutex); - - schedule(); - remove_wait_queue(&chip->wq, &wait); - printk(KERN_INFO "%s: woke up to write\n", map->name); - if(signal_pending(current)) - return -EINTR; - - timeo = jiffies + HZ; - - goto retry; - } - - chip->state = FL_WRITING; - - adr += chip->start; - ENABLE_VPP(map); - send_cmd(map, chip->start, CMD_PROGRAM_UNLOCK_DATA); - wide_write(map, datum, adr); - - times_left = 500000; - while (times_left-- && flash_is_busy(map, adr, private->interleave)) { - if (need_resched()) { - spin_unlock_bh(chip->mutex); - schedule(); - spin_lock_bh(chip->mutex); - } - } - - if (!times_left) { - printk(KERN_WARNING "%s: write to 0x%lx timed out!\n", - map->name, adr); - ret = -EIO; - } else { - __u32 verify; - if ((verify = wide_read(map, adr)) != datum) { - printk(KERN_WARNING "%s: write to 0x%lx failed. " - "datum = %x, verify = %x\n", - map->name, adr, datum, verify); - ret = -EIO; - } - } - - DISABLE_VPP(map); - chip->state = FL_READY; - wake_up(&chip->wq); - spin_unlock_bh(chip->mutex); - - return ret; -} - - - -static int amd_flash_write(struct mtd_info *mtd, loff_t to , size_t len, - size_t *retlen, const u_char *buf) -{ - struct map_info *map = mtd->priv; - struct amd_flash_private *private = map->fldrv_priv; - int ret = 0; - int chipnum; - unsigned long ofs; - unsigned long chipstart; - - *retlen = 0; - if (!len) { - return 0; - } - - chipnum = to >> private->chipshift; - ofs = to - (chipnum << private->chipshift); - chipstart = private->chips[chipnum].start; - - /* If it's not bus-aligned, do the first byte write. */ - if (ofs & (map->buswidth - 1)) { - unsigned long bus_ofs = ofs & ~(map->buswidth - 1); - int i = ofs - bus_ofs; - int n = 0; - u_char tmp_buf[4]; - __u32 datum; - - map_copy_from(map, tmp_buf, - bus_ofs + private->chips[chipnum].start, - map->buswidth); - while (len && i < map->buswidth) - tmp_buf[i++] = buf[n++], len--; - - if (map->buswidth == 2) { - datum = *(__u16*)tmp_buf; - } else if (map->buswidth == 4) { - datum = *(__u32*)tmp_buf; - } else { - return -EINVAL; /* should never happen, but be safe */ - } - - ret = write_one_word(map, &private->chips[chipnum], bus_ofs, - datum); - if (ret) { - return ret; - } - - ofs += n; - buf += n; - (*retlen) += n; - - if (ofs >> private->chipshift) { - chipnum++; - ofs = 0; - if (chipnum == private->numchips) { - return 0; - } - } - } - - /* We are now aligned, write as much as possible. */ - while(len >= map->buswidth) { - __u32 datum; - - if (map->buswidth == 1) { - datum = *(__u8*)buf; - } else if (map->buswidth == 2) { - datum = *(__u16*)buf; - } else if (map->buswidth == 4) { - datum = *(__u32*)buf; - } else { - return -EINVAL; - } - - ret = write_one_word(map, &private->chips[chipnum], ofs, datum); - - if (ret) { - return ret; - } - - ofs += map->buswidth; - buf += map->buswidth; - (*retlen) += map->buswidth; - len -= map->buswidth; - - if (ofs >> private->chipshift) { - chipnum++; - ofs = 0; - if (chipnum == private->numchips) { - return 0; - } - chipstart = private->chips[chipnum].start; - } - } - - if (len & (map->buswidth - 1)) { - int i = 0, n = 0; - u_char tmp_buf[2]; - __u32 datum; - - map_copy_from(map, tmp_buf, - ofs + private->chips[chipnum].start, - map->buswidth); - while (len--) { - tmp_buf[i++] = buf[n++]; - } - - if (map->buswidth == 2) { - datum = *(__u16*)tmp_buf; - } else if (map->buswidth == 4) { - datum = *(__u32*)tmp_buf; - } else { - return -EINVAL; /* should never happen, but be safe */ - } - - ret = write_one_word(map, &private->chips[chipnum], ofs, datum); - - if (ret) { - return ret; - } - - (*retlen) += n; - } - - return 0; -} - - - -static inline int erase_one_block(struct map_info *map, struct flchip *chip, - unsigned long adr, u_long size) -{ - unsigned long timeo = jiffies + HZ; - struct amd_flash_private *private = map->fldrv_priv; - DECLARE_WAITQUEUE(wait, current); - -retry: - spin_lock_bh(chip->mutex); - - if (chip->state != FL_READY){ - set_current_state(TASK_UNINTERRUPTIBLE); - add_wait_queue(&chip->wq, &wait); - - spin_unlock_bh(chip->mutex); - - schedule(); - remove_wait_queue(&chip->wq, &wait); - - if (signal_pending(current)) { - return -EINTR; - } - - timeo = jiffies + HZ; - - goto retry; - } - - chip->state = FL_ERASING; - - adr += chip->start; - ENABLE_VPP(map); - send_cmd(map, chip->start, CMD_SECTOR_ERASE_UNLOCK_DATA); - send_cmd_to_addr(map, chip->start, CMD_SECTOR_ERASE_UNLOCK_DATA_2, adr); - - timeo = jiffies + (HZ * 20); - - spin_unlock_bh(chip->mutex); - msleep(1000); - spin_lock_bh(chip->mutex); - - while (flash_is_busy(map, adr, private->interleave)) { - - if (chip->state != FL_ERASING) { - /* Someone's suspended the erase. Sleep */ - set_current_state(TASK_UNINTERRUPTIBLE); - add_wait_queue(&chip->wq, &wait); - - spin_unlock_bh(chip->mutex); - printk(KERN_INFO "%s: erase suspended. Sleeping\n", - map->name); - schedule(); - remove_wait_queue(&chip->wq, &wait); - - if (signal_pending(current)) { - return -EINTR; - } - - timeo = jiffies + (HZ*2); /* FIXME */ - spin_lock_bh(chip->mutex); - continue; - } - - /* OK Still waiting */ - if (time_after(jiffies, timeo)) { - chip->state = FL_READY; - spin_unlock_bh(chip->mutex); - printk(KERN_WARNING "%s: waiting for erase to complete " - "timed out.\n", map->name); - DISABLE_VPP(map); - - return -EIO; - } - - /* Latency issues. Drop the lock, wait a while and retry */ - spin_unlock_bh(chip->mutex); - - if (need_resched()) - schedule(); - else - udelay(1); - - spin_lock_bh(chip->mutex); - } - - /* Verify every single word */ - { - int address; - int error = 0; - __u8 verify; - - for (address = adr; address < (adr + size); address++) { - if ((verify = map_read8(map, address)) != 0xFF) { - error = 1; - break; - } - } - if (error) { - chip->state = FL_READY; - spin_unlock_bh(chip->mutex); - printk(KERN_WARNING - "%s: verify error at 0x%x, size %ld.\n", - map->name, address, size); - DISABLE_VPP(map); - - return -EIO; - } - } - - DISABLE_VPP(map); - chip->state = FL_READY; - wake_up(&chip->wq); - spin_unlock_bh(chip->mutex); - - return 0; -} - - - -static int amd_flash_erase(struct mtd_info *mtd, struct erase_info *instr) -{ - struct map_info *map = mtd->priv; - struct amd_flash_private *private = map->fldrv_priv; - unsigned long adr, len; - int chipnum; - int ret = 0; - int i; - int first; - struct mtd_erase_region_info *regions = mtd->eraseregions; - - if (instr->addr > mtd->size) { - return -EINVAL; - } - - if ((instr->len + instr->addr) > mtd->size) { - return -EINVAL; - } - - /* Check that both start and end of the requested erase are - * aligned with the erasesize at the appropriate addresses. - */ - - i = 0; - - /* Skip all erase regions which are ended before the start of - the requested erase. Actually, to save on the calculations, - we skip to the first erase region which starts after the - start of the requested erase, and then go back one. - */ - - while ((i < mtd->numeraseregions) && - (instr->addr >= regions[i].offset)) { - i++; - } - i--; - - /* OK, now i is pointing at the erase region in which this - * erase request starts. Check the start of the requested - * erase range is aligned with the erase size which is in - * effect here. - */ - - if (instr->addr & (regions[i].erasesize-1)) { - return -EINVAL; - } - - /* Remember the erase region we start on. */ - - first = i; - - /* Next, check that the end of the requested erase is aligned - * with the erase region at that address. - */ - - while ((i < mtd->numeraseregions) && - ((instr->addr + instr->len) >= regions[i].offset)) { - i++; - } - - /* As before, drop back one to point at the region in which - * the address actually falls. - */ - - i--; - - if ((instr->addr + instr->len) & (regions[i].erasesize-1)) { - return -EINVAL; - } - - chipnum = instr->addr >> private->chipshift; - adr = instr->addr - (chipnum << private->chipshift); - len = instr->len; - - i = first; - - while (len) { - ret = erase_one_block(map, &private->chips[chipnum], adr, - regions[i].erasesize); - - if (ret) { - return ret; - } - - adr += regions[i].erasesize; - len -= regions[i].erasesize; - - if ((adr % (1 << private->chipshift)) == - ((regions[i].offset + (regions[i].erasesize * - regions[i].numblocks)) - % (1 << private->chipshift))) { - i++; - } - - if (adr >> private->chipshift) { - adr = 0; - chipnum++; - if (chipnum >= private->numchips) { - break; - } - } - } - - instr->state = MTD_ERASE_DONE; - mtd_erase_callback(instr); - - return 0; -} - - - -static void amd_flash_sync(struct mtd_info *mtd) -{ - struct map_info *map = mtd->priv; - struct amd_flash_private *private = map->fldrv_priv; - int i; - struct flchip *chip; - int ret = 0; - DECLARE_WAITQUEUE(wait, current); - - for (i = 0; !ret && (i < private->numchips); i++) { - chip = &private->chips[i]; - - retry: - spin_lock_bh(chip->mutex); - - switch(chip->state) { - case FL_READY: - case FL_STATUS: - case FL_CFI_QUERY: - case FL_JEDEC_QUERY: - chip->oldstate = chip->state; - chip->state = FL_SYNCING; - /* No need to wake_up() on this state change - - * as the whole point is that nobody can do anything - * with the chip now anyway. - */ - case FL_SYNCING: - spin_unlock_bh(chip->mutex); - break; - - default: - /* Not an idle state */ - add_wait_queue(&chip->wq, &wait); - - spin_unlock_bh(chip->mutex); - - schedule(); - - remove_wait_queue(&chip->wq, &wait); - - goto retry; - } - } - - /* Unlock the chips again */ - for (i--; i >= 0; i--) { - chip = &private->chips[i]; - - spin_lock_bh(chip->mutex); - - if (chip->state == FL_SYNCING) { - chip->state = chip->oldstate; - wake_up(&chip->wq); - } - spin_unlock_bh(chip->mutex); - } -} - - - -static int amd_flash_suspend(struct mtd_info *mtd) -{ -printk("amd_flash_suspend(): not implemented!\n"); - return -EINVAL; -} - - - -static void amd_flash_resume(struct mtd_info *mtd) -{ -printk("amd_flash_resume(): not implemented!\n"); -} - - - -static void amd_flash_destroy(struct mtd_info *mtd) -{ - struct map_info *map = mtd->priv; - struct amd_flash_private *private = map->fldrv_priv; - kfree(private); -} - -int __init amd_flash_init(void) -{ - register_mtd_chip_driver(&amd_flash_chipdrv); - return 0; -} - -void __exit amd_flash_exit(void) -{ - unregister_mtd_chip_driver(&amd_flash_chipdrv); -} - -module_init(amd_flash_init); -module_exit(amd_flash_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Jonas Holmberg <jonas.holmberg@axis.com>"); -MODULE_DESCRIPTION("Old MTD chip driver for AMD flash chips"); diff --git a/drivers/mtd/chips/jedec.c b/drivers/mtd/chips/jedec.c deleted file mode 100644 index 14e57b2bf84..00000000000 --- a/drivers/mtd/chips/jedec.c +++ /dev/null @@ -1,935 +0,0 @@ - -/* JEDEC Flash Interface. - * This is an older type of interface for self programming flash. It is - * commonly use in older AMD chips and is obsolete compared with CFI. - * It is called JEDEC because the JEDEC association distributes the ID codes - * for the chips. - * - * See the AMD flash databook for information on how to operate the interface. - * - * This code does not support anything wider than 8 bit flash chips, I am - * not going to guess how to send commands to them, plus I expect they will - * all speak CFI.. - * - * $Id: jedec.c,v 1.22 2005/01/05 18:05:11 dwmw2 Exp $ - */ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/mtd/jedec.h> -#include <linux/mtd/map.h> -#include <linux/mtd/mtd.h> -#include <linux/mtd/compatmac.h> - -static struct mtd_info *jedec_probe(struct map_info *); -static int jedec_probe8(struct map_info *map,unsigned long base, - struct jedec_private *priv); -static int jedec_probe16(struct map_info *map,unsigned long base, - struct jedec_private *priv); -static int jedec_probe32(struct map_info *map,unsigned long base, - struct jedec_private *priv); -static void jedec_flash_chip_scan(struct jedec_private *priv,unsigned long start, - unsigned long len); -static int flash_erase(struct mtd_info *mtd, struct erase_info *instr); -static int flash_write(struct mtd_info *mtd, loff_t start, size_t len, - size_t *retlen, const u_char *buf); - -static unsigned long my_bank_size; - -/* Listing of parts and sizes. We need this table to learn the sector - size of the chip and the total length */ -static const struct JEDECTable JEDEC_table[] = { - { - .jedec = 0x013D, - .name = "AMD Am29F017D", - .size = 2*1024*1024, - .sectorsize = 64*1024, - .capabilities = MTD_CAP_NORFLASH - }, - { - .jedec = 0x01AD, - .name = "AMD Am29F016", - .size = 2*1024*1024, - .sectorsize = 64*1024, - .capabilities = MTD_CAP_NORFLASH - }, - { - .jedec = 0x01D5, - .name = "AMD Am29F080", - .size = 1*1024*1024, - .sectorsize = 64*1024, - .capabilities = MTD_CAP_NORFLASH - }, - { - .jedec = 0x01A4, - .name = "AMD Am29F040", - .size = 512*1024, - .sectorsize = 64*1024, - .capabilities = MTD_CAP_NORFLASH - }, - { - .jedec = 0x20E3, - .name = "AMD Am29W040B", - .size = 512*1024, - .sectorsize = 64*1024, - .capabilities = MTD_CAP_NORFLASH - }, - { - .jedec = 0xC2AD, - .name = "Macronix MX29F016", - .size = 2*1024*1024, - .sectorsize = 64*1024, - .capabilities = MTD_CAP_NORFLASH - }, - { .jedec = 0x0 } -}; - -static const struct JEDECTable *jedec_idtoinf(__u8 mfr,__u8 id); -static void jedec_sync(struct mtd_info *mtd) {}; -static int jedec_read(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, u_char *buf); -static int jedec_read_banked(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, u_char *buf); - -static struct mtd_info *jedec_probe(struct map_info *map); - - - -static struct mtd_chip_driver jedec_chipdrv = { - .probe = jedec_probe, - .name = "jedec", - .module = THIS_MODULE -}; - -/* Probe entry point */ - -static struct mtd_info *jedec_probe(struct map_info *map) -{ - struct mtd_info *MTD; - struct jedec_private *priv; - unsigned long Base; - unsigned long SectorSize; - unsigned count; - unsigned I,Uniq; - char Part[200]; - memset(&priv,0,sizeof(priv)); - - MTD = kzalloc(sizeof(struct mtd_info) + sizeof(struct jedec_private), GFP_KERNEL); - if (!MTD) - return NULL; - - priv = (struct jedec_private *)&MTD[1]; - - my_bank_size = map->size; - - if (map->size/my_bank_size > MAX_JEDEC_CHIPS) - { - printk("mtd: Increase MAX_JEDEC_CHIPS, too many banks.\n"); - kfree(MTD); - return NULL; - } - - for (Base = 0; Base < map->size; Base += my_bank_size) - { - // Perhaps zero could designate all tests? - if (map->buswidth == 0) - map->buswidth = 1; - - if (map->buswidth == 1){ - if (jedec_probe8(map,Base,priv) == 0) { - printk("did recognize jedec chip\n"); - kfree(MTD); - return NULL; - } - } - if (map->buswidth == 2) - jedec_probe16(map,Base,priv); - if (map->buswidth == 4) - jedec_probe32(map,Base,priv); - } - - // Get the biggest sector size - SectorSize = 0; - for (I = 0; priv->chips[I].jedec != 0 && I < MAX_JEDEC_CHIPS; I++) - { - // printk("priv->chips[%d].jedec is %x\n",I,priv->chips[I].jedec); - // printk("priv->chips[%d].sectorsize is %lx\n",I,priv->chips[I].sectorsize); - if (priv->chips[I].sectorsize > SectorSize) - SectorSize = priv->chips[I].sectorsize; - } - - // Quickly ensure that the other sector sizes are factors of the largest - for (I = 0; priv->chips[I].jedec != 0 && I < MAX_JEDEC_CHIPS; I++) - { - if ((SectorSize/priv->chips[I].sectorsize)*priv->chips[I].sectorsize != SectorSize) - { - printk("mtd: Failed. Device has incompatible mixed sector sizes\n"); - kfree(MTD); - return NULL; - } - } - - /* Generate a part name that includes the number of different chips and - other configuration information */ - count = 1; - strlcpy(Part,map->name,sizeof(Part)-10); - strcat(Part," "); - Uniq = 0; - for (I = 0; priv->chips[I].jedec != 0 && I < MAX_JEDEC_CHIPS; I++) - { - const struct JEDECTable *JEDEC; - - if (priv->chips[I+1].jedec == priv->chips[I].jedec) - { - count++; - continue; - } - - // Locate the chip in the jedec table - JEDEC = jedec_idtoinf(priv->chips[I].jedec >> 8,priv->chips[I].jedec); - if (JEDEC == 0) - { - printk("mtd: Internal Error, JEDEC not set\n"); - kfree(MTD); - return NULL; - } - - if (Uniq != 0) - strcat(Part,","); - Uniq++; - - if (count != 1) - sprintf(Part+strlen(Part),"%x*[%s]",count,JEDEC->name); - else - sprintf(Part+strlen(Part),"%s",JEDEC->name); - if (strlen(Part) > sizeof(Part)*2/3) - break; - count = 1; - } - - /* Determine if the chips are organized in a linear fashion, or if there - are empty banks. Note, the last bank does not count here, only the - first banks are important. Holes on non-bank boundaries can not exist - due to the way the detection algorithm works. */ - if (priv->size < my_bank_size) - my_bank_size = priv->size; - priv->is_banked = 0; - //printk("priv->size is %x, my_bank_size is %x\n",priv->size,my_bank_size); - //printk("priv->bank_fill[0] is %x\n",priv->bank_fill[0]); - if (!priv->size) { - printk("priv->size is zero\n"); - kfree(MTD); - return NULL; - } - if (priv->size/my_bank_size) { - if (priv->size/my_bank_size == 1) { - priv->size = my_bank_size; - } - else { - for (I = 0; I != priv->size/my_bank_size - 1; I++) - { - if (priv->bank_fill[I] != my_bank_size) - priv->is_banked = 1; - - /* This even could be eliminated, but new de-optimized read/write - functions have to be written */ - printk("priv->bank_fill[%d] is %lx, priv->bank_fill[0] is %lx\n",I,priv->bank_fill[I],priv->bank_fill[0]); - if (priv->bank_fill[I] != priv->bank_fill[0]) - { - printk("mtd: Failed. Cannot handle unsymmetric banking\n"); - kfree(MTD); - return NULL; - } - } - } - } - if (priv->is_banked == 1) - strcat(Part,", banked"); - - // printk("Part: '%s'\n",Part); - - memset(MTD,0,sizeof(*MTD)); - // strlcpy(MTD->name,Part,sizeof(MTD->name)); - MTD->name = map->name; - MTD->type = MTD_NORFLASH; - MTD->flags = MTD_CAP_NORFLASH; - MTD->writesize = 1; - MTD->erasesize = SectorSize*(map->buswidth); - // printk("MTD->erasesize is %x\n",(unsigned int)MTD->erasesize); - MTD->size = priv->size; - // printk("MTD->size is %x\n",(unsigned int)MTD->size); - //MTD->module = THIS_MODULE; // ? Maybe this should be the low level module? - MTD->erase = flash_erase; - if (priv->is_banked == 1) - MTD->read = jedec_read_banked; - else - MTD->read = jedec_read; - MTD->write = flash_write; - MTD->sync = jedec_sync; - MTD->priv = map; - map->fldrv_priv = priv; - map->fldrv = &jedec_chipdrv; - __module_get(THIS_MODULE); - return MTD; -} - -/* Helper for the JEDEC function, JEDEC numbers all have odd parity */ -static int checkparity(u_char C) -{ - u_char parity = 0; - while (C != 0) - { - parity ^= C & 1; - C >>= 1; - } - - return parity == 1; -} - - -/* Take an array of JEDEC numbers that represent interleved flash chips - and process them. Check to make sure they are good JEDEC numbers, look - them up and then add them to the chip list */ -static int handle_jedecs(struct map_info *map,__u8 *Mfg,__u8 *Id,unsigned Count, - unsigned long base,struct jedec_private *priv) -{ - unsigned I,J; - unsigned long Size; - unsigned long SectorSize; - const struct JEDECTable *JEDEC; - - // Test #2 JEDEC numbers exhibit odd parity - for (I = 0; I != Count; I++) - { - if (checkparity(Mfg[I]) == 0 || checkparity(Id[I]) == 0) - return 0; - } - - // Finally, just make sure all the chip sizes are the same - JEDEC = jedec_idtoinf(Mfg[0],Id[0]); - - if (JEDEC == 0) - { - printk("mtd: Found JEDEC flash chip, but do not have a table entry for %x:%x\n",Mfg[0],Mfg[1]); - return 0; - } - - Size = JEDEC->size; - SectorSize = JEDEC->sectorsize; - for (I = 0; I != Count; I++) - { - JEDEC = jedec_idtoinf(Mfg[0],Id[0]); - if (JEDEC == 0) - { - printk("mtd: Found JEDEC flash chip, but do not have a table entry for %x:%x\n",Mfg[0],Mfg[1]); - return 0; - } - - if (Size != JEDEC->size || SectorSize != JEDEC->sectorsize) - { - printk("mtd: Failed. Interleved flash does not have matching characteristics\n"); - return 0; - } - } - - // Load the Chips - for (I = 0; I != MAX_JEDEC_CHIPS; I++) - { - if (priv->chips[I].jedec == 0) - break; - } - - if (I + Count > MAX_JEDEC_CHIPS) - { - printk("mtd: Device has too many chips. Increase MAX_JEDEC_CHIPS\n"); - return 0; - } - - // Add them to the table - for (J = 0; J != Count; J++) - { - unsigned long Bank; - - JEDEC = jedec_idtoinf(Mfg[J],Id[J]); - priv->chips[I].jedec = (Mfg[J] << 8) | Id[J]; - priv->chips[I].size = JEDEC->size; - priv->chips[I].sectorsize = JEDEC->sectorsize; - priv->chips[I].base = base + J; - priv->chips[I].datashift = J*8; - priv->chips[I].capabilities = JEDEC->capabilities; - priv->chips[I].offset = priv->size + J; - - // log2 n :| - priv->chips[I].addrshift = 0; - for (Bank = Count; Bank != 1; Bank >>= 1, priv->chips[I].addrshift++); - - // Determine how filled this bank is. - Bank = base & (~(my_bank_size-1)); - if (priv->bank_fill[Bank/my_bank_size] < base + - (JEDEC->size << priv->chips[I].addrshift) - Bank) - priv->bank_fill[Bank/my_bank_size] = base + (JEDEC->size << priv->chips[I].addrshift) - Bank; - I++; - } - - priv->size += priv->chips[I-1].size*Count; - - return priv->chips[I-1].size; -} - -/* Lookup the chip information from the JEDEC ID table. */ -static const struct JEDECTable *jedec_idtoinf(__u8 mfr,__u8 id) -{ - __u16 Id = (mfr << 8) | id; - unsigned long I = 0; - for (I = 0; JEDEC_table[I].jedec != 0; I++) - if (JEDEC_table[I].jedec == Id) - return JEDEC_table + I; - return NULL; -} - -// Look for flash using an 8 bit bus interface -static int jedec_probe8(struct map_info *map,unsigned long base, - struct jedec_private *priv) -{ - #define flread(x) map_read8(map,base+x) - #define flwrite(v,x) map_write8(map,v,base+x) - - const unsigned long AutoSel1 = 0xAA; - const unsigned long AutoSel2 = 0x55; - const unsigned long AutoSel3 = 0x90; - const unsigned long Reset = 0xF0; - __u32 OldVal; - __u8 Mfg[1]; - __u8 Id[1]; - unsigned I; - unsigned long Size; - - // Wait for any write/erase operation to settle - OldVal = flread(base); - for (I = 0; OldVal != flread(base) && I < 10000; I++) - OldVal = flread(base); - - // Reset the chip - flwrite(Reset,0x555); - - // Send the sequence - flwrite(AutoSel1,0x555); - flwrite(AutoSel2,0x2AA); - flwrite(AutoSel3,0x555); - - // Get the JEDEC numbers - Mfg[0] = flread(0); - Id[0] = flread(1); - // printk("Mfg is %x, Id is %x\n",Mfg[0],Id[0]); - - Size = handle_jedecs(map,Mfg,Id,1,base,priv); - // printk("handle_jedecs Size is %x\n",(unsigned int)Size); - if (Size == 0) - { - flwrite(Reset,0x555); - return 0; - } - - - // Reset. - flwrite(Reset,0x555); - - return 1; - - #undef flread - #undef flwrite -} - -// Look for flash using a 16 bit bus interface (ie 2 8-bit chips) -static int jedec_probe16(struct map_info *map,unsigned long base, - struct jedec_private *priv) -{ - return 0; -} - -// Look for flash using a 32 bit bus interface (ie 4 8-bit chips) -static int jedec_probe32(struct map_info *map,unsigned long base, - struct jedec_private *priv) -{ - #define flread(x) map_read32(map,base+((x)<<2)) - #define flwrite(v,x) map_write32(map,v,base+((x)<<2)) - - const unsigned long AutoSel1 = 0xAAAAAAAA; - const unsigned long AutoSel2 = 0x55555555; - const unsigned long AutoSel3 = 0x90909090; - const unsigned long Reset = 0xF0F0F0F0; - __u32 OldVal; - __u8 Mfg[4]; - __u8 Id[4]; - unsigned I; - unsigned long Size; - - // Wait for any write/erase operation to settle - OldVal = flread(base); - for (I = 0; OldVal != flread(base) && I < 10000; I++) - OldVal = flread(base); - - // Reset the chip - flwrite(Reset,0x555); - - // Send the sequence - flwrite(AutoSel1,0x555); - flwrite(AutoSel2,0x2AA); - flwrite(AutoSel3,0x555); - - // Test #1, JEDEC numbers are readable from 0x??00/0x??01 - if (flread(0) != flread(0x100) || - flread(1) != flread(0x101)) - { - flwrite(Reset,0x555); - return 0; - } - - // Split up the JEDEC numbers - OldVal = flread(0); - for (I = 0; I != 4; I++) - Mfg[I] = (OldVal >> (I*8)); - OldVal = flread(1); - for (I = 0; I != 4; I++) - Id[I] = (OldVal >> (I*8)); - - Size = handle_jedecs(map,Mfg,Id,4,base,priv); - if (Size == 0) - { - flwrite(Reset,0x555); - return 0; - } - - /* Check if there is address wrap around within a single bank, if this - returns JEDEC numbers then we assume that it is wrap around. Notice - we call this routine with the JEDEC return still enabled, if two or - more flashes have a truncated address space the probe test will still - work */ - if (base + (Size<<2)+0x555 < map->size && - base + (Size<<2)+0x555 < (base & (~(my_bank_size-1))) + my_bank_size) - { - if (flread(base+Size) != flread(base+Size + 0x100) || - flread(base+Size + 1) != flread(base+Size + 0x101)) - { - jedec_probe32(map,base+Size,priv); - } - } - - // Reset. - flwrite(0xF0F0F0F0,0x555); - - return 1; - - #undef flread - #undef flwrite -} - -/* Linear read. */ -static int jedec_read(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, u_char *buf) -{ - struct map_info *map = mtd->priv; - - map_copy_from(map, buf, from, len); - *retlen = len; - return 0; -} - -/* Banked read. Take special care to jump past the holes in the bank - mapping. This version assumes symetry in the holes.. */ -static int jedec_read_banked(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, u_char *buf) -{ - struct map_info *map = mtd->priv; - struct jedec_private *priv = map->fldrv_priv; - - *retlen = 0; - while (len > 0) - { - // Determine what bank and offset into that bank the first byte is - unsigned long bank = from & (~(priv->bank_fill[0]-1)); - unsigned long offset = from & (priv->bank_fill[0]-1); - unsigned long get = len; - if (priv->bank_fill[0] - offset < len) - get = priv->bank_fill[0] - offset; - - bank /= priv->bank_fill[0]; - map_copy_from(map,buf + *retlen,bank*my_bank_size + offset,get); - - len -= get; - *retlen += get; - from += get; - } - return 0; -} - -/* Pass the flags value that the flash return before it re-entered read - mode. */ -static void jedec_flash_failed(unsigned char code) -{ - /* Bit 5 being high indicates that there was an internal device - failure, erasure time limits exceeded or something */ - if ((code & (1 << 5)) != 0) - { - printk("mtd: Internal Flash failure\n"); - return; - } - printk("mtd: Programming didn't take\n"); -} - -/* This uses the erasure function described in the AMD Flash Handbook, - it will work for flashes with a fixed sector size only. Flashes with - a selection of sector sizes (ie the AMD Am29F800B) will need a different - routine. This routine tries to parallize erasing multiple chips/sectors - where possible */ -static int flash_erase(struct mtd_info *mtd, struct erase_info *instr) -{ - // Does IO to the currently selected chip - #define flread(x) map_read8(map,chip->base+((x)<<chip->addrshift)) - #define flwrite(v,x) map_write8(map,v,chip->base+((x)<<chip->addrshift)) - - unsigned long Time = 0; - unsigned long NoTime = 0; - unsigned long start = instr->addr, len = instr->len; - unsigned int I; - struct map_info *map = mtd->priv; - struct jedec_private *priv = map->fldrv_priv; - - // Verify the arguments.. - if (start + len > mtd->size || - (start % mtd->erasesize) != 0 || - (len % mtd->erasesize) != 0 || - (len/mtd->erasesize) == 0) - return -EINVAL; - - jedec_flash_chip_scan(priv,start,len); - - // Start the erase sequence on each chip - for (I = 0; priv->chips[I].jedec != 0 && I < MAX_JEDEC_CHIPS; I++) - { - unsigned long off; - struct jedec_flash_chip *chip = priv->chips + I; - - if (chip->length == 0) - continue; - - if (chip->start + chip->length > chip->size) - { - printk("DIE\n"); - return -EIO; - } - - flwrite(0xF0,chip->start + 0x555); - flwrite(0xAA,chip->start + 0x555); - flwrite(0x55,chip->start + 0x2AA); - flwrite(0x80,chip->start + 0x555); - flwrite(0xAA,chip->start + 0x555); - flwrite(0x55,chip->start + 0x2AA); - - /* Once we start selecting the erase sectors the delay between each - command must not exceed 50us or it will immediately start erasing - and ignore the other sectors */ - for (off = 0; off < len; off += chip->sectorsize) - { - // Check to make sure we didn't timeout - flwrite(0x30,chip->start + off); - if (off == 0) - continue; - if ((flread(chip->start + off) & (1 << 3)) != 0) - { - printk("mtd: Ack! We timed out the erase timer!\n"); - return -EIO; - } - } - } - - /* We could split this into a timer routine and return early, performing - background erasure.. Maybe later if the need warrents */ - - /* Poll the flash for erasure completion, specs say this can take as long - as 480 seconds to do all the sectors (for a 2 meg flash). - Erasure time is dependent on chip age, temp and wear.. */ - - /* This being a generic routine assumes a 32 bit bus. It does read32s - and bundles interleved chips into the same grouping. This will work - for all bus widths */ - Time = 0; - NoTime = 0; - for (I = 0; priv->chips[I].jedec != 0 && I < MAX_JEDEC_CHIPS; I++) - { - struct jedec_flash_chip *chip = priv->chips + I; - unsigned long off = 0; - unsigned todo[4] = {0,0,0,0}; - unsigned todo_left = 0; - unsigned J; - - if (chip->length == 0) - continue; - - /* Find all chips in this data line, realistically this is all - or nothing up to the interleve count */ - for (J = 0; priv->chips[J].jedec != 0 && J < MAX_JEDEC_CHIPS; J++) - { - if ((priv->chips[J].base & (~((1<<chip->addrshift)-1))) == - (chip->base & (~((1<<chip->addrshift)-1)))) - { - todo_left++; - todo[priv->chips[J].base & ((1<<chip->addrshift)-1)] = 1; - } - } - - /* printk("todo: %x %x %x %x\n",(short)todo[0],(short)todo[1], - (short)todo[2],(short)todo[3]); - */ - while (1) - { - __u32 Last[4]; - unsigned long Count = 0; - - /* During erase bit 7 is held low and bit 6 toggles, we watch this, - should it stop toggling or go high then the erase is completed, - or this is not really flash ;> */ - switch (map->buswidth) { - case 1: - Last[0] = map_read8(map,(chip->base >> chip->addrshift) + chip->start + off); - Last[1] = map_read8(map,(chip->base >> chip->addrshift) + chip->start + off); - Last[2] = map_read8(map,(chip->base >> chip->addrshift) + chip->start + off); - break; - case 2: - Last[0] = map_read16(map,(chip->base >> chip->addrshift) + chip->start + off); - Last[1] = map_read16(map,(chip->base >> chip->addrshift) + chip->start + off); - Last[2] = map_read16(map,(chip->base >> chip->addrshift) + chip->start + off); - break; - case 3: - Last[0] = map_read32(map,(chip->base >> chip->addrshift) + chip->start + off); - Last[1] = map_read32(map,(chip->base >> chip->addrshift) + chip->start + off); - Last[2] = map_read32(map,(chip->base >> chip->addrshift) + chip->start + off); - break; - } - Count = 3; - while (todo_left != 0) - { - for (J = 0; J != 4; J++) - { - __u8 Byte1 = (Last[(Count-1)%4] >> (J*8)) & 0xFF; - __u8 Byte2 = (Last[(Count-2)%4] >> (J*8)) & 0xFF; - __u8 Byte3 = (Last[(Count-3)%4] >> (J*8)) & 0xFF; - if (todo[J] == 0) - continue; - - if ((Byte1 & (1 << 7)) == 0 && Byte1 != Byte2) - { -// printk("Check %x %x %x\n",(short)J,(short)Byte1,(short)Byte2); - continue; - } - - if (Byte1 == Byte2) - { - jedec_flash_failed(Byte3); - return -EIO; - } - - todo[J] = 0; - todo_left--; - } - -/* if (NoTime == 0) - Time += HZ/10 - schedule_timeout(HZ/10);*/ - NoTime = 0; - - switch (map->buswidth) { - case 1: - Last[Count % 4] = map_read8(map,(chip->base >> chip->addrshift) + chip->start + off); - break; - case 2: - Last[Count % 4] = map_read16(map,(chip->base >> chip->addrshift) + chip->start + off); - break; - case 4: - Last[Count % 4] = map_read32(map,(chip->base >> chip->addrshift) + chip->start + off); - break; - } - Count++; - -/* // Count time, max of 15s per sector (according to AMD) - if (Time > 15*len/mtd->erasesize*HZ) - { - printk("mtd: Flash Erase Timed out\n"); - return -EIO; - } */ - } - - // Skip to the next chip if we used chip erase - if (chip->length == chip->size) - off = chip->size; - else - off += chip->sectorsize; - - if (off >= chip->length) - break; - NoTime = 1; - } - - for (J = 0; priv->chips[J].jedec != 0 && J < MAX_JEDEC_CHIPS; J++) - { - if ((priv->chips[J].base & (~((1<<chip->addrshift)-1))) == - (chip->base & (~((1<<chip->addrshift)-1)))) - priv->chips[J].length = 0; - } - } - - //printk("done\n"); - instr->state = MTD_ERASE_DONE; - mtd_erase_callback(instr); - return 0; - - #undef flread - #undef flwrite -} - -/* This is the simple flash writing function. It writes to every byte, in - sequence. It takes care of how to properly address the flash if - the flash is interleved. It can only be used if all the chips in the - array are identical!*/ -static int flash_write(struct mtd_info *mtd, loff_t start, size_t len, - size_t *retlen, const u_char *buf) -{ - /* Does IO to the currently selected chip. It takes the bank addressing - base (which is divisible by the chip size) adds the necessary lower bits - of addrshift (interleave index) and then adds the control register index. */ - #define flread(x) map_read8(map,base+(off&((1<<chip->addrshift)-1))+((x)<<chip->addrshift)) - #define flwrite(v,x) map_write8(map,v,base+(off&((1<<chip->addrshift)-1))+((x)<<chip->addrshift)) - - struct map_info *map = mtd->priv; - struct jedec_private *priv = map->fldrv_priv; - unsigned long base; - unsigned long off; - size_t save_len = len; - - if (start + len > mtd->size) - return -EIO; - - //printk("Here"); - - //printk("flash_write: start is %x, len is %x\n",start,(unsigned long)len); - while (len != 0) - { - struct jedec_flash_chip *chip = priv->chips; - unsigned long bank; - unsigned long boffset; - - // Compute the base of the flash. - off = ((unsigned long)start) % (chip->size << chip->addrshift); - base = start - off; - - // Perform banked addressing translation. - bank = base & (~(priv->bank_fill[0]-1)); - boffset = base & (priv->bank_fill[0]-1); - bank = (bank/priv->bank_fill[0])*my_bank_size; - base = bank + boffset; - - // printk("Flasing %X %X %X\n",base,chip->size,len); - // printk("off is %x, compare with %x\n",off,chip->size << chip->addrshift); - - // Loop over this page - for (; off != (chip->size << chip->addrshift) && len != 0; start++, len--, off++,buf++) - { - unsigned char oldbyte = map_read8(map,base+off); - unsigned char Last[4]; - unsigned long Count = 0; - - if (oldbyte == *buf) { - // printk("oldbyte and *buf is %x,len is %x\n",oldbyte,len); - continue; - } - if (((~oldbyte) & *buf) != 0) - printk("mtd: warn: Trying to set a 0 to a 1\n"); - - // Write - flwrite(0xAA,0x555); - flwrite(0x55,0x2AA); - flwrite(0xA0,0x555); - map_write8(map,*buf,base + off); - Last[0] = map_read8(map,base + off); - Last[1] = map_read8(map,base + off); - Last[2] = map_read8(map,base + off); - - /* Wait for the flash to finish the operation. We store the last 4 - status bytes that have been retrieved so we can determine why - it failed. The toggle bits keep toggling when there is a - failure */ - for (Count = 3; Last[(Count - 1) % 4] != Last[(Count - 2) % 4] && - Count < 10000; Count++) - Last[Count % 4] = map_read8(map,base + off); - if (Last[(Count - 1) % 4] != *buf) - { - jedec_flash_failed(Last[(Count - 3) % 4]); - return -EIO; - } - } - } - *retlen = save_len; - return 0; -} - -/* This is used to enhance the speed of the erase routine, - when things are being done to multiple chips it is possible to - parallize the operations, particularly full memory erases of multi - chip memories benifit */ -static void jedec_flash_chip_scan(struct jedec_private *priv,unsigned long start, - unsigned long len) -{ - unsigned int I; - - // Zero the records - for (I = 0; priv->chips[I].jedec != 0 && I < MAX_JEDEC_CHIPS; I++) - priv->chips[I].start = priv->chips[I].length = 0; - - // Intersect the region with each chip - for (I = 0; priv->chips[I].jedec != 0 && I < MAX_JEDEC_CHIPS; I++) - { - struct jedec_flash_chip *chip = priv->chips + I; - unsigned long ByteStart; - unsigned long ChipEndByte = chip->offset + (chip->size << chip->addrshift); - - // End is before this chip or the start is after it - if (start+len < chip->offset || - ChipEndByte - (1 << chip->addrshift) < start) - continue; - - if (start < chip->offset) - { - ByteStart = chip->offset; - chip->start = 0; - } - else - { - chip->start = (start - chip->offset + (1 << chip->addrshift)-1) >> chip->addrshift; - ByteStart = start; - } - - if (start + len >= ChipEndByte) - chip->length = (ChipEndByte - ByteStart) >> chip->addrshift; - else - chip->length = (start + len - ByteStart + (1 << chip->addrshift)-1) >> chip->addrshift; - } -} - -int __init jedec_init(void) -{ - register_mtd_chip_driver(&jedec_chipdrv); - return 0; -} - -static void __exit jedec_exit(void) -{ - unregister_mtd_chip_driver(&jedec_chipdrv); -} - -module_init(jedec_init); -module_exit(jedec_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Jason Gunthorpe <jgg@deltatee.com> et al."); -MODULE_DESCRIPTION("Old MTD chip driver for JEDEC-compliant flash chips"); diff --git a/drivers/mtd/chips/sharp.c b/drivers/mtd/chips/sharp.c deleted file mode 100644 index c9cd3d21ccf..00000000000 --- a/drivers/mtd/chips/sharp.c +++ /dev/null @@ -1,601 +0,0 @@ -/* - * MTD chip driver for pre-CFI Sharp flash chips - * - * Copyright 2000,2001 David A. Schleef <ds@schleef.org> - * 2000,2001 Lineo, Inc. - * - * $Id: sharp.c,v 1.17 2005/11/29 14:28:28 gleixner Exp $ - * - * Devices supported: - * LH28F016SCT Symmetrical block flash memory, 2Mx8 - * LH28F008SCT Symmetrical block flash memory, 1Mx8 - * - * Documentation: - * http://www.sharpmeg.com/datasheets/memic/flashcmp/ - * http://www.sharpmeg.com/datasheets/memic/flashcmp/01symf/16m/016sctl9.pdf - * 016sctl9.pdf - * - * Limitations: - * This driver only supports 4x1 arrangement of chips. - * Not tested on anything but PowerPC. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/types.h> -#include <linux/sched.h> -#include <linux/errno.h> -#include <linux/interrupt.h> -#include <linux/mtd/map.h> -#include <linux/mtd/mtd.h> -#include <linux/mtd/cfi.h> -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/slab.h> - -#define CMD_RESET 0xffffffff -#define CMD_READ_ID 0x90909090 -#define CMD_READ_STATUS 0x70707070 -#define CMD_CLEAR_STATUS 0x50505050 -#define CMD_BLOCK_ERASE_1 0x20202020 -#define CMD_BLOCK_ERASE_2 0xd0d0d0d0 -#define CMD_BYTE_WRITE 0x40404040 -#define CMD_SUSPEND 0xb0b0b0b0 -#define CMD_RESUME 0xd0d0d0d0 -#define CMD_SET_BLOCK_LOCK_1 0x60606060 -#define CMD_SET_BLOCK_LOCK_2 0x01010101 -#define CMD_SET_MASTER_LOCK_1 0x60606060 -#define CMD_SET_MASTER_LOCK_2 0xf1f1f1f1 -#define CMD_CLEAR_BLOCK_LOCKS_1 0x60606060 -#define CMD_CLEAR_BLOCK_LOCKS_2 0xd0d0d0d0 - -#define SR_READY 0x80808080 // 1 = ready -#define SR_ERASE_SUSPEND 0x40404040 // 1 = block erase suspended -#define SR_ERROR_ERASE 0x20202020 // 1 = error in block erase or clear lock bits -#define SR_ERROR_WRITE 0x10101010 // 1 = error in byte write or set lock bit -#define SR_VPP 0x08080808 // 1 = Vpp is low -#define SR_WRITE_SUSPEND 0x04040404 // 1 = byte write suspended -#define SR_PROTECT 0x02020202 // 1 = lock bit set -#define SR_RESERVED 0x01010101 - -#define SR_ERRORS (SR_ERROR_ERASE|SR_ERROR_WRITE|SR_VPP|SR_PROTECT) - -/* Configuration options */ - -#undef AUTOUNLOCK /* automatically unlocks blocks before erasing */ - -static struct mtd_info *sharp_probe(struct map_info *); - -static int sharp_probe_map(struct map_info *map,struct mtd_info *mtd); - -static int sharp_read(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, u_char *buf); -static int sharp_write(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, const u_char *buf); -static int sharp_erase(struct mtd_info *mtd, struct erase_info *instr); -static void sharp_sync(struct mtd_info *mtd); -static int sharp_suspend(struct mtd_info *mtd); -static void sharp_resume(struct mtd_info *mtd); -static void sharp_destroy(struct mtd_info *mtd); - -static int sharp_write_oneword(struct map_info *map, struct flchip *chip, - unsigned long adr, __u32 datum); -static int sharp_erase_oneblock(struct map_info *map, struct flchip *chip, - unsigned long adr); -#ifdef AUTOUNLOCK -static void sharp_unlock_oneblock(struct map_info *map, struct flchip *chip, - unsigned long adr); -#endif - - -struct sharp_info{ - struct flchip *chip; - int bogus; - int chipshift; - int numchips; - struct flchip chips[1]; -}; - -static void sharp_destroy(struct mtd_info *mtd); - -static struct mtd_chip_driver sharp_chipdrv = { - .probe = sharp_probe, - .destroy = sharp_destroy, - .name = "sharp", - .module = THIS_MODULE -}; - - -static struct mtd_info *sharp_probe(struct map_info *map) -{ - struct mtd_info *mtd = NULL; - struct sharp_info *sharp = NULL; - int width; - - mtd = kzalloc(sizeof(*mtd), GFP_KERNEL); - if(!mtd) - return NULL; - - sharp = kzalloc(sizeof(*sharp), GFP_KERNEL); - if(!sharp) { - kfree(mtd); - return NULL; - } - - width = sharp_probe_map(map,mtd); - if(!width){ - kfree(mtd); - kfree(sharp); - return NULL; - } - - mtd->priv = map; - mtd->type = MTD_NORFLASH; - mtd->erase = sharp_erase; - mtd->read = sharp_read; - mtd->write = sharp_write; - mtd->sync = sharp_sync; - mtd->suspend = sharp_suspend; - mtd->resume = sharp_resume; - mtd->flags = MTD_CAP_NORFLASH; - mtd->writesize = 1; - mtd->name = map->name; - - sharp->chipshift = 23; - sharp->numchips = 1; - sharp->chips[0].start = 0; - sharp->chips[0].state = FL_READY; - sharp->chips[0].mutex = &sharp->chips[0]._spinlock; - sharp->chips[0].word_write_time = 0; - init_waitqueue_head(&sharp->chips[0].wq); - spin_lock_init(&sharp->chips[0]._spinlock); - - map->fldrv = &sharp_chipdrv; - map->fldrv_priv = sharp; - - __module_get(THIS_MODULE); - return mtd; -} - -static inline void sharp_send_cmd(struct map_info *map, unsigned long cmd, unsigned long adr) -{ - map_word map_cmd; - map_cmd.x[0] = cmd; - map_write(map, map_cmd, adr); -} - -static int sharp_probe_map(struct map_info *map,struct mtd_info *mtd) -{ - map_word tmp, read0, read4; - unsigned long base = 0; - int width = 4; - - tmp = map_read(map, base+0); - - sharp_send_cmd(map, CMD_READ_ID, base+0); - - read0 = map_read(map, base+0); - read4 = map_read(map, base+4); - if(read0.x[0] == 0x89898989){ - printk("Looks like sharp flash\n"); - switch(read4.x[0]){ - case 0xaaaaaaaa: - case 0xa0a0a0a0: - /* aa - LH28F016SCT-L95 2Mx8, 32 64k blocks*/ - /* a0 - LH28F016SCT-Z4 2Mx8, 32 64k blocks*/ - mtd->erasesize = 0x10000 * width; - mtd->size = 0x200000 * width; - return width; - case 0xa6a6a6a6: - /* a6 - LH28F008SCT-L12 1Mx8, 16 64k blocks*/ - /* a6 - LH28F008SCR-L85 1Mx8, 16 64k blocks*/ - mtd->erasesize = 0x10000 * width; - mtd->size = 0x100000 * width; - return width; -#if 0 - case 0x00000000: /* unknown */ - /* XX - LH28F004SCT 512kx8, 8 64k blocks*/ - mtd->erasesize = 0x10000 * width; - mtd->size = 0x80000 * width; - return width; -#endif - default: - printk("Sort-of looks like sharp flash, 0x%08lx 0x%08lx\n", - read0.x[0], read4.x[0]); - } - }else if((map_read(map, base+0).x[0] == CMD_READ_ID)){ - /* RAM, probably */ - printk("Looks like RAM\n"); - map_write(map, tmp, base+0); - }else{ - printk("Doesn't look like sharp flash, 0x%08lx 0x%08lx\n", - read0.x[0], read4.x[0]); - } - - return 0; -} - -/* This function returns with the chip->mutex lock held. */ -static int sharp_wait(struct map_info *map, struct flchip *chip) -{ - int i; - map_word status; - unsigned long timeo = jiffies + HZ; - DECLARE_WAITQUEUE(wait, current); - int adr = 0; - -retry: - spin_lock_bh(chip->mutex); - - switch(chip->state){ - case FL_READY: - sharp_send_cmd(map, CMD_READ_STATUS, adr); - chip->state = FL_STATUS; - case FL_STATUS: - for(i=0;i<100;i++){ - status = map_read(map, adr); - if((status.x[0] & SR_READY)==SR_READY) - break; - udelay(1); - } - break; - default: - printk("Waiting for chip\n"); - - set_current_state(TASK_INTERRUPTIBLE); - add_wait_queue(&chip->wq, &wait); - - spin_unlock_bh(chip->mutex); - - schedule(); - remove_wait_queue(&chip->wq, &wait); - - if(signal_pending(current)) - return -EINTR; - - timeo = jiffies + HZ; - - goto retry; - } - - sharp_send_cmd(map, CMD_RESET, adr); - - chip->state = FL_READY; - - return 0; -} - -static void sharp_release(struct flchip *chip) -{ - wake_up(&chip->wq); - spin_unlock_bh(chip->mutex); -} - -static int sharp_read(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, u_char *buf) -{ - struct map_info *map = mtd->priv; - struct sharp_info *sharp = map->fldrv_priv; - int chipnum; - int ret = 0; - int ofs = 0; - - chipnum = (from >> sharp->chipshift); - ofs = from & ((1 << sharp->chipshift)-1); - - *retlen = 0; - - while(len){ - unsigned long thislen; - - if(chipnum>=sharp->numchips) - break; - - thislen = len; - if(ofs+thislen >= (1<<sharp->chipshift)) - thislen = (1<<sharp->chipshift) - ofs; - - ret = sharp_wait(map,&sharp->chips[chipnum]); - if(ret<0) - break; - - map_copy_from(map,buf,ofs,thislen); - - sharp_release(&sharp->chips[chipnum]); - - *retlen += thislen; - len -= thislen; - buf += thislen; - - ofs = 0; - chipnum++; - } - return ret; -} - -static int sharp_write(struct mtd_info *mtd, loff_t to, size_t len, - size_t *retlen, const u_char *buf) -{ - struct map_info *map = mtd->priv; - struct sharp_info *sharp = map->fldrv_priv; - int ret = 0; - int i,j; - int chipnum; - unsigned long ofs; - union { u32 l; unsigned char uc[4]; } tbuf; - - *retlen = 0; - - while(len){ - tbuf.l = 0xffffffff; - chipnum = to >> sharp->chipshift; - ofs = to & ((1<<sharp->chipshift)-1); - - j=0; - for(i=ofs&3;i<4 && len;i++){ - tbuf.uc[i] = *buf; - buf++; - to++; - len--; - j++; - } - sharp_write_oneword(map, &sharp->chips[chipnum], ofs&~3, tbuf.l); - if(ret<0) - return ret; - (*retlen)+=j; - } - - return 0; -} - -static int sharp_write_oneword(struct map_info *map, struct flchip *chip, - unsigned long adr, __u32 datum) -{ - int ret; - int timeo; - int try; - int i; - map_word data, status; - - status.x[0] = 0; - ret = sharp_wait(map,chip); - - for(try=0;try<10;try++){ - sharp_send_cmd(map, CMD_BYTE_WRITE, adr); - /* cpu_to_le32 -> hack to fix the writel be->le conversion */ - data.x[0] = cpu_to_le32(datum); - map_write(map, data, adr); - - chip->state = FL_WRITING; - - timeo = jiffies + (HZ/2); - - sharp_send_cmd(map, CMD_READ_STATUS, adr); - for(i=0;i<100;i++){ - status = map_read(map, adr); - if((status.x[0] & SR_READY) == SR_READY) - break; - } - if(i==100){ - printk("sharp: timed out writing\n"); - } - - if(!(status.x[0] & SR_ERRORS)) - break; - - printk("sharp: error writing byte at addr=%08lx status=%08lx\n", adr, status.x[0]); - - sharp_send_cmd(map, CMD_CLEAR_STATUS, adr); - } - sharp_send_cmd(map, CMD_RESET, adr); - chip->state = FL_READY; - - wake_up(&chip->wq); - spin_unlock_bh(chip->mutex); - - return 0; -} - -static int sharp_erase(struct mtd_info *mtd, struct erase_info *instr) -{ - struct map_info *map = mtd->priv; - struct sharp_info *sharp = map->fldrv_priv; - unsigned long adr,len; - int chipnum, ret=0; - -//printk("sharp_erase()\n"); - if(instr->addr & (mtd->erasesize - 1)) - return -EINVAL; - if(instr->len & (mtd->erasesize - 1)) - return -EINVAL; - if(instr->len + instr->addr > mtd->size) - return -EINVAL; - - chipnum = instr->addr >> sharp->chipshift; - adr = instr->addr & ((1<<sharp->chipshift)-1); - len = instr->len; - - while(len){ - ret = sharp_erase_oneblock(map, &sharp->chips[chipnum], adr); - if(ret)return ret; - - adr += mtd->erasesize; - len -= mtd->erasesize; - if(adr >> sharp->chipshift){ - adr = 0; - chipnum++; - if(chipnum>=sharp->numchips) - break; - } - } - - instr->state = MTD_ERASE_DONE; - mtd_erase_callback(instr); - - return 0; -} - -static int sharp_do_wait_for_ready(struct map_info *map, struct flchip *chip, - unsigned long adr) -{ - int ret; - unsigned long timeo; - map_word status; - DECLARE_WAITQUEUE(wait, current); - - sharp_send_cmd(map, CMD_READ_STATUS, adr); - status = map_read(map, adr); - - timeo = jiffies + HZ; - - while(time_before(jiffies, timeo)){ - sharp_send_cmd(map, CMD_READ_STATUS, adr); - status = map_read(map, adr); - if((status.x[0] & SR_READY)==SR_READY){ - ret = 0; - goto out; - } - set_current_state(TASK_INTERRUPTIBLE); - add_wait_queue(&chip->wq, &wait); - - //spin_unlock_bh(chip->mutex); - - schedule_timeout(1); - schedule(); - remove_wait_queue(&chip->wq, &wait); - - //spin_lock_bh(chip->mutex); - - if (signal_pending(current)){ - ret = -EINTR; - goto out; - } - - } - ret = -ETIME; -out: - return ret; -} - -static int sharp_erase_oneblock(struct map_info *map, struct flchip *chip, - unsigned long adr) -{ - int ret; - //int timeo; - map_word status; - //int i; - -//printk("sharp_erase_oneblock()\n"); - -#ifdef AUTOUNLOCK - /* This seems like a good place to do an unlock */ - sharp_unlock_oneblock(map,chip,adr); -#endif - - sharp_send_cmd(map, CMD_BLOCK_ERASE_1, adr); - sharp_send_cmd(map, CMD_BLOCK_ERASE_2, adr); - - chip->state = FL_ERASING; - - ret = sharp_do_wait_for_ready(map,chip,adr); - if(ret<0)return ret; - - sharp_send_cmd(map, CMD_READ_STATUS, adr); - status = map_read(map, adr); - - if(!(status.x[0] & SR_ERRORS)){ - sharp_send_cmd(map, CMD_RESET, adr); - chip->state = FL_READY; - //spin_unlock_bh(chip->mutex); - return 0; - } - - printk("sharp: error erasing block at addr=%08lx status=%08lx\n", adr, status.x[0]); - sharp_send_cmd(map, CMD_CLEAR_STATUS, adr); - - //spin_unlock_bh(chip->mutex); - - return -EIO; -} - -#ifdef AUTOUNLOCK -static void sharp_unlock_oneblock(struct map_info *map, struct flchip *chip, - unsigned long adr) -{ - int i; - map_word status; - - sharp_send_cmd(map, CMD_CLEAR_BLOCK_LOCKS_1, adr); - sharp_send_cmd(map, CMD_CLEAR_BLOCK_LOCKS_2, adr); - - udelay(100); - - status = map_read(map, adr); - printk("status=%08lx\n", status.x[0]); - - for(i=0;i<1000;i++){ - //sharp_send_cmd(map, CMD_READ_STATUS, adr); - status = map_read(map, adr); - if((status.x[0] & SR_READY) == SR_READY) - break; - udelay(100); - } - if(i==1000){ - printk("sharp: timed out unlocking block\n"); - } - - if(!(status.x[0] & SR_ERRORS)){ - sharp_send_cmd(map, CMD_RESET, adr); - chip->state = FL_READY; - return; - } - - printk("sharp: error unlocking block at addr=%08lx status=%08lx\n", adr, status.x[0]); - sharp_send_cmd(map, CMD_CLEAR_STATUS, adr); -} -#endif - -static void sharp_sync(struct mtd_info *mtd) -{ - //printk("sharp_sync()\n"); -} - -static int sharp_suspend(struct mtd_info *mtd) -{ - printk("sharp_suspend()\n"); - return -EINVAL; -} - -static void sharp_resume(struct mtd_info *mtd) -{ - printk("sharp_resume()\n"); - -} - -static void sharp_destroy(struct mtd_info *mtd) -{ - printk("sharp_destroy()\n"); - -} - -static int __init sharp_probe_init(void) -{ - printk("MTD Sharp chip driver <ds@lineo.com>\n"); - - register_mtd_chip_driver(&sharp_chipdrv); - - return 0; -} - -static void __exit sharp_probe_exit(void) -{ - unregister_mtd_chip_driver(&sharp_chipdrv); -} - -module_init(sharp_probe_init); -module_exit(sharp_probe_exit); - - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("David Schleef <ds@schleef.org>"); -MODULE_DESCRIPTION("Old MTD chip driver for pre-CFI Sharp flash chips"); |