# 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
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
#
# 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
+++ /dev/null
-/*
- * 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");
+++ /dev/null
-
-/* 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");
+++ /dev/null
-/*
- * 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");
projects / linux-2.6 / commitdiff