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path: root/drivers/mtd/chips/cfi_cmdset_0002.c
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Diffstat (limited to 'drivers/mtd/chips/cfi_cmdset_0002.c')
-rw-r--r--drivers/mtd/chips/cfi_cmdset_0002.c79
1 files changed, 45 insertions, 34 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index cf8c8be40a9c..04b383bc3947 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -123,19 +123,23 @@ static int cfi_use_status_reg(struct cfi_private *cfi)
(extp->SoftwareFeatures & poll_mask) == CFI_POLL_STATUS_REG;
}
-static void cfi_check_err_status(struct map_info *map, struct flchip *chip,
- unsigned long adr)
+static int cfi_check_err_status(struct map_info *map, struct flchip *chip,
+ unsigned long adr)
{
struct cfi_private *cfi = map->fldrv_priv;
map_word status;
if (!cfi_use_status_reg(cfi))
- return;
+ return 0;
cfi_send_gen_cmd(0x70, cfi->addr_unlock1, chip->start, map, cfi,
cfi->device_type, NULL);
status = map_read(map, adr);
+ /* The error bits are invalid while the chip's busy */
+ if (!map_word_bitsset(map, status, CMD(CFI_SR_DRB)))
+ return 0;
+
if (map_word_bitsset(map, status, CMD(0x3a))) {
unsigned long chipstatus = MERGESTATUS(status);
@@ -151,7 +155,12 @@ static void cfi_check_err_status(struct map_info *map, struct flchip *chip,
if (chipstatus & CFI_SR_SLSB)
pr_err("%s sector write protected, status %lx\n",
map->name, chipstatus);
+
+ /* Erase/Program status bits are set on the operation failure */
+ if (chipstatus & (CFI_SR_ESB | CFI_SR_PSB))
+ return 1;
}
+ return 0;
}
/* #define DEBUG_CFI_FEATURES */
@@ -785,7 +794,6 @@ static struct mtd_info *cfi_amdstd_setup(struct mtd_info *mtd)
kfree(mtd->eraseregions);
kfree(mtd);
kfree(cfi->cmdset_priv);
- kfree(cfi->cfiq);
return NULL;
}
@@ -848,20 +856,16 @@ static int __xipram chip_good(struct map_info *map, struct flchip *chip,
if (cfi_use_status_reg(cfi)) {
map_word ready = CMD(CFI_SR_DRB);
- map_word err = CMD(CFI_SR_PSB | CFI_SR_ESB);
+
/*
* For chips that support status register, check device
- * ready bit and Erase/Program status bit to know if
- * operation succeeded.
+ * ready bit
*/
cfi_send_gen_cmd(0x70, cfi->addr_unlock1, chip->start, map, cfi,
cfi->device_type, NULL);
curd = map_read(map, addr);
- if (map_word_andequal(map, curd, ready, ready))
- return !map_word_bitsset(map, curd, err);
-
- return 0;
+ return map_word_andequal(map, curd, ready, ready);
}
oldd = map_read(map, addr);
@@ -1699,8 +1703,11 @@ static int __xipram do_write_oneword_once(struct map_info *map,
break;
}
- if (chip_good(map, chip, adr, datum))
+ if (chip_good(map, chip, adr, datum)) {
+ if (cfi_check_err_status(map, chip, adr))
+ ret = -EIO;
break;
+ }
/* Latency issues. Drop the lock, wait a while and retry */
UDELAY(map, chip, adr, 1);
@@ -1713,7 +1720,7 @@ static int __xipram do_write_oneword_start(struct map_info *map,
struct flchip *chip,
unsigned long adr, int mode)
{
- int ret = 0;
+ int ret;
mutex_lock(&chip->mutex);
@@ -1773,7 +1780,6 @@ static int __xipram do_write_oneword_retry(struct map_info *map,
ret = do_write_oneword_once(map, chip, adr, datum, mode, cfi);
if (ret) {
/* reset on all failures. */
- cfi_check_err_status(map, chip, adr);
map_write(map, CMD(0xF0), chip->start);
/* FIXME - should have reset delay before continuing */
@@ -1791,7 +1797,7 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip,
unsigned long adr, map_word datum,
int mode)
{
- int ret = 0;
+ int ret;
adr += chip->start;
@@ -1815,7 +1821,7 @@ static int cfi_amdstd_write_words(struct mtd_info *mtd, loff_t to, size_t len,
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
- int ret = 0;
+ int ret;
int chipnum;
unsigned long ofs, chipstart;
DECLARE_WAITQUEUE(wait, current);
@@ -1970,12 +1976,17 @@ static int __xipram do_write_buffer_wait(struct map_info *map,
*/
if (time_after(jiffies, timeo) &&
!chip_good(map, chip, adr, datum)) {
+ pr_err("MTD %s(): software timeout, address:0x%.8lx.\n",
+ __func__, adr);
ret = -EIO;
break;
}
- if (chip_good(map, chip, adr, datum))
+ if (chip_good(map, chip, adr, datum)) {
+ if (cfi_check_err_status(map, chip, adr))
+ ret = -EIO;
break;
+ }
/* Latency issues. Drop the lock, wait a while and retry */
UDELAY(map, chip, adr, 1);
@@ -2014,7 +2025,7 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
int len)
{
struct cfi_private *cfi = map->fldrv_priv;
- int ret = -EIO;
+ int ret;
unsigned long cmd_adr;
int z, words;
map_word datum;
@@ -2071,12 +2082,8 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
chip->word_write_time);
ret = do_write_buffer_wait(map, chip, adr, datum);
- if (ret) {
- cfi_check_err_status(map, chip, adr);
+ if (ret)
do_write_buffer_reset(map, chip, cfi);
- pr_err("MTD %s(): software timeout, address:0x%.8lx.\n",
- __func__, adr);
- }
xip_enable(map, chip, adr);
@@ -2095,7 +2102,7 @@ static int cfi_amdstd_write_buffers(struct mtd_info *mtd, loff_t to, size_t len,
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize;
- int ret = 0;
+ int ret;
int chipnum;
unsigned long ofs;
@@ -2232,7 +2239,7 @@ static int do_panic_write_oneword(struct map_info *map, struct flchip *chip,
struct cfi_private *cfi = map->fldrv_priv;
int retry_cnt = 0;
map_word oldd;
- int ret = 0;
+ int ret;
int i;
adr += chip->start;
@@ -2271,9 +2278,9 @@ retry:
udelay(1);
}
- if (!chip_good(map, chip, adr, datum)) {
+ if (!chip_good(map, chip, adr, datum) ||
+ cfi_check_err_status(map, chip, adr)) {
/* reset on all failures. */
- cfi_check_err_status(map, chip, adr);
map_write(map, CMD(0xF0), chip->start);
/* FIXME - should have reset delay before continuing */
@@ -2307,7 +2314,7 @@ static int cfi_amdstd_panic_write(struct mtd_info *mtd, loff_t to, size_t len,
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
unsigned long ofs, chipstart;
- int ret = 0;
+ int ret;
int chipnum;
chipnum = to >> cfi->chipshift;
@@ -2411,7 +2418,7 @@ static int __xipram do_erase_chip(struct map_info *map, struct flchip *chip)
unsigned long timeo = jiffies + HZ;
unsigned long int adr;
DECLARE_WAITQUEUE(wait, current);
- int ret = 0;
+ int ret;
int retry_cnt = 0;
adr = cfi->addr_unlock1;
@@ -2467,8 +2474,11 @@ static int __xipram do_erase_chip(struct map_info *map, struct flchip *chip)
chip->erase_suspended = 0;
}
- if (chip_good(map, chip, adr, map_word_ff(map)))
+ if (chip_good(map, chip, adr, map_word_ff(map))) {
+ if (cfi_check_err_status(map, chip, adr))
+ ret = -EIO;
break;
+ }
if (time_after(jiffies, timeo)) {
printk(KERN_WARNING "MTD %s(): software timeout\n",
@@ -2483,7 +2493,6 @@ static int __xipram do_erase_chip(struct map_info *map, struct flchip *chip)
/* Did we succeed? */
if (ret) {
/* reset on all failures. */
- cfi_check_err_status(map, chip, adr);
map_write(map, CMD(0xF0), chip->start);
/* FIXME - should have reset delay before continuing */
@@ -2508,7 +2517,7 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
struct cfi_private *cfi = map->fldrv_priv;
unsigned long timeo = jiffies + HZ;
DECLARE_WAITQUEUE(wait, current);
- int ret = 0;
+ int ret;
int retry_cnt = 0;
adr += chip->start;
@@ -2564,8 +2573,11 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
chip->erase_suspended = 0;
}
- if (chip_good(map, chip, adr, map_word_ff(map)))
+ if (chip_good(map, chip, adr, map_word_ff(map))) {
+ if (cfi_check_err_status(map, chip, adr))
+ ret = -EIO;
break;
+ }
if (time_after(jiffies, timeo)) {
printk(KERN_WARNING "MTD %s(): software timeout\n",
@@ -2580,7 +2592,6 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
/* Did we succeed? */
if (ret) {
/* reset on all failures. */
- cfi_check_err_status(map, chip, adr);
map_write(map, CMD(0xF0), chip->start);
/* FIXME - should have reset delay before continuing */
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-24 21:03:09 +0300