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mtd: cfi_cmdset_0002: make sector erase command variable 

Some old SST chips use 0x50 as sector erase command, instead
of 0x30. Make this value variable to handle such chips.

Signed-off-by: Guillaume LECERF <glecerf@gmail.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Guillaume LECERF 2010-10-26 10:45:23 +01:00 committed by David Woodhouse
parent 9fc05fcada
commit 08968041be
3 changed files with 9 additions and 4 deletions
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10
drivers/mtd/chips/cfi_cmdset_0002.c
View File

@ -291,6 +291,8 @@ static void fixup_sst39vf_rev_b(struct mtd_info *mtd, void *param)
cfi->addr_unlock1 = 0x555;
cfi->addr_unlock2 = 0x2AA;
cfi->sector_erase_cmd = CMD(0x50);
}
static void fixup_sst38vf640x_sectorsize(struct mtd_info *mtd, void *param)
@ -691,7 +693,7 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr
* there was an error (so leave the erase
* routine to recover from it) or we trying to
* use the erase-in-progress sector. */
map_write(map, CMD(0x30), chip->in_progress_block_addr);
map_write(map, cfi->sector_erase_cmd, chip->in_progress_block_addr);
chip->state = FL_ERASING;
chip->oldstate = FL_READY;
printk(KERN_ERR "MTD %s(): chip not ready after erase suspend\n", __func__);
@ -744,7 +746,7 @@ static void put_chip(struct map_info *map, struct flchip *chip, unsigned long ad
switch(chip->oldstate) {
case FL_ERASING:
chip->state = chip->oldstate;
map_write(map, CMD(0x30), chip->in_progress_block_addr);
map_write(map, cfi->sector_erase_cmd, chip->in_progress_block_addr);
chip->oldstate = FL_READY;
chip->state = FL_ERASING;
break;
@ -887,7 +889,7 @@ static void __xipram xip_udelay(struct map_info *map, struct flchip *chip,
local_irq_disable();
/* Resume the write or erase operation */
map_write(map, CMD(0x30), adr);
map_write(map, cfi->sector_erase_cmd, adr);
chip->state = oldstate;
start = xip_currtime();
} else if (usec >= 1000000/HZ) {
@ -1670,7 +1672,7 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
map_write(map, CMD(0x30), adr);
map_write(map, cfi->sector_erase_cmd, adr);
chip->state = FL_ERASING;
chip->erase_suspended = 0;

2
drivers/mtd/chips/cfi_probe.c
View File

@ -177,6 +177,8 @@ static int __xipram cfi_chip_setup(struct map_info *map,
cfi->cfi_mode = CFI_MODE_CFI;
cfi->sector_erase_cmd = CMD(0x30);
/* Read the CFI info structure */
xip_disable_qry(base, map, cfi);
for (i=0; i<(sizeof(struct cfi_ident) + num_erase_regions * 4); i++)

1
include/linux/mtd/cfi.h
View File

@ -289,6 +289,7 @@ struct cfi_private {
must be of the same type. */
int mfr, id;
int numchips;
map_word sector_erase_cmd;
unsigned long chipshift; /* Because they're of the same type */
const char *im_name; /* inter_module name for cmdset_setup */
struct flchip chips[0]; /* per-chip data structure for each chip */