172 lines
5.1 KiB
Diff
172 lines
5.1 KiB
Diff
Index: linux-2.6.25.1/drivers/mtd/chips/cfi_cmdset_0001.c
|
|
===================================================================
|
|
--- linux-2.6.25.1.orig/drivers/mtd/chips/cfi_cmdset_0001.c
|
|
+++ linux-2.6.25.1/drivers/mtd/chips/cfi_cmdset_0001.c
|
|
@@ -1008,7 +1008,7 @@ static void __xipram xip_enable(struct m
|
|
|
|
static int __xipram xip_wait_for_operation(
|
|
struct map_info *map, struct flchip *chip,
|
|
- unsigned long adr, unsigned int chip_op_time )
|
|
+ unsigned long adr, int *chip_op_time )
|
|
{
|
|
struct cfi_private *cfi = map->fldrv_priv;
|
|
struct cfi_pri_intelext *cfip = cfi->cmdset_priv;
|
|
@@ -1017,7 +1017,7 @@ static int __xipram xip_wait_for_operati
|
|
flstate_t oldstate, newstate;
|
|
|
|
start = xip_currtime();
|
|
- usec = chip_op_time * 8;
|
|
+ usec = *chip_op_time * 8;
|
|
if (usec == 0)
|
|
usec = 500000;
|
|
done = 0;
|
|
@@ -1127,8 +1127,8 @@ static int __xipram xip_wait_for_operati
|
|
#define XIP_INVAL_CACHED_RANGE(map, from, size) \
|
|
INVALIDATE_CACHED_RANGE(map, from, size)
|
|
|
|
-#define INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, inval_adr, inval_len, usec) \
|
|
- xip_wait_for_operation(map, chip, cmd_adr, usec)
|
|
+#define INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, inval_adr, inval_len, p_usec) \
|
|
+ xip_wait_for_operation(map, chip, cmd_adr, p_usec)
|
|
|
|
#else
|
|
|
|
@@ -1140,65 +1140,65 @@ static int __xipram xip_wait_for_operati
|
|
static int inval_cache_and_wait_for_operation(
|
|
struct map_info *map, struct flchip *chip,
|
|
unsigned long cmd_adr, unsigned long inval_adr, int inval_len,
|
|
- unsigned int chip_op_time)
|
|
+ int *chip_op_time )
|
|
{
|
|
struct cfi_private *cfi = map->fldrv_priv;
|
|
map_word status, status_OK = CMD(0x80);
|
|
- int chip_state = chip->state;
|
|
- unsigned int timeo, sleep_time;
|
|
+ int z, chip_state = chip->state;
|
|
+ unsigned long timeo;
|
|
|
|
spin_unlock(chip->mutex);
|
|
if (inval_len)
|
|
INVALIDATE_CACHED_RANGE(map, inval_adr, inval_len);
|
|
+ if (*chip_op_time)
|
|
+ cfi_udelay(*chip_op_time);
|
|
spin_lock(chip->mutex);
|
|
|
|
- /* set our timeout to 8 times the expected delay */
|
|
- timeo = chip_op_time * 8;
|
|
- if (!timeo)
|
|
- timeo = 500000;
|
|
- sleep_time = chip_op_time / 2;
|
|
+ timeo = *chip_op_time * 8 * HZ / 1000000;
|
|
+ if (timeo < HZ/2)
|
|
+ timeo = HZ/2;
|
|
+ timeo += jiffies;
|
|
|
|
+ z = 0;
|
|
for (;;) {
|
|
+ if (chip->state != chip_state) {
|
|
+ /* Someone's suspended the operation: sleep */
|
|
+ DECLARE_WAITQUEUE(wait, current);
|
|
+
|
|
+ set_current_state(TASK_UNINTERRUPTIBLE);
|
|
+ add_wait_queue(&chip->wq, &wait);
|
|
+ spin_unlock(chip->mutex);
|
|
+ schedule();
|
|
+ remove_wait_queue(&chip->wq, &wait);
|
|
+ timeo = jiffies + (HZ / 2); /* FIXME */
|
|
+ spin_lock(chip->mutex);
|
|
+ continue;
|
|
+ }
|
|
+
|
|
status = map_read(map, cmd_adr);
|
|
if (map_word_andequal(map, status, status_OK, status_OK))
|
|
break;
|
|
|
|
- if (!timeo) {
|
|
+ /* OK Still waiting */
|
|
+ if (time_after(jiffies, timeo)) {
|
|
map_write(map, CMD(0x70), cmd_adr);
|
|
chip->state = FL_STATUS;
|
|
return -ETIME;
|
|
}
|
|
|
|
- /* OK Still waiting. Drop the lock, wait a while and retry. */
|
|
+ /* Latency issues. Drop the lock, wait a while and retry */
|
|
+ z++;
|
|
spin_unlock(chip->mutex);
|
|
- if (sleep_time >= 1000000/HZ) {
|
|
- /*
|
|
- * Half of the normal delay still remaining
|
|
- * can be performed with a sleeping delay instead
|
|
- * of busy waiting.
|
|
- */
|
|
- msleep(sleep_time/1000);
|
|
- timeo -= sleep_time;
|
|
- sleep_time = 1000000/HZ;
|
|
- } else {
|
|
- udelay(1);
|
|
- cond_resched();
|
|
- timeo--;
|
|
- }
|
|
+ cfi_udelay(1);
|
|
spin_lock(chip->mutex);
|
|
-
|
|
- while (chip->state != chip_state) {
|
|
- /* Someone's suspended the operation: sleep */
|
|
- DECLARE_WAITQUEUE(wait, current);
|
|
- set_current_state(TASK_UNINTERRUPTIBLE);
|
|
- add_wait_queue(&chip->wq, &wait);
|
|
- spin_unlock(chip->mutex);
|
|
- schedule();
|
|
- remove_wait_queue(&chip->wq, &wait);
|
|
- spin_lock(chip->mutex);
|
|
- }
|
|
}
|
|
|
|
+ if (!z) {
|
|
+ if (!--(*chip_op_time))
|
|
+ *chip_op_time = 1;
|
|
+ } else if (z > 1)
|
|
+ ++(*chip_op_time);
|
|
+
|
|
/* Done and happy. */
|
|
chip->state = FL_STATUS;
|
|
return 0;
|
|
@@ -1207,7 +1207,8 @@ static int inval_cache_and_wait_for_oper
|
|
#endif
|
|
|
|
#define WAIT_TIMEOUT(map, chip, adr, udelay) \
|
|
- INVAL_CACHE_AND_WAIT(map, chip, adr, 0, 0, udelay);
|
|
+ ({ int __udelay = (udelay); \
|
|
+ INVAL_CACHE_AND_WAIT(map, chip, adr, 0, 0, &__udelay); })
|
|
|
|
|
|
static int do_point_onechip (struct map_info *map, struct flchip *chip, loff_t adr, size_t len)
|
|
@@ -1438,7 +1439,7 @@ static int __xipram do_write_oneword(str
|
|
|
|
ret = INVAL_CACHE_AND_WAIT(map, chip, adr,
|
|
adr, map_bankwidth(map),
|
|
- chip->word_write_time);
|
|
+ &chip->word_write_time);
|
|
if (ret) {
|
|
xip_enable(map, chip, adr);
|
|
printk(KERN_ERR "%s: word write error (status timeout)\n", map->name);
|
|
@@ -1678,7 +1679,7 @@ static int __xipram do_write_buffer(stru
|
|
|
|
ret = INVAL_CACHE_AND_WAIT(map, chip, cmd_adr,
|
|
initial_adr, initial_len,
|
|
- chip->buffer_write_time);
|
|
+ &chip->buffer_write_time);
|
|
if (ret) {
|
|
map_write(map, CMD(0x70), cmd_adr);
|
|
chip->state = FL_STATUS;
|
|
@@ -1813,7 +1814,7 @@ static int __xipram do_erase_oneblock(st
|
|
|
|
ret = INVAL_CACHE_AND_WAIT(map, chip, adr,
|
|
adr, len,
|
|
- chip->erase_time);
|
|
+ &chip->erase_time);
|
|
if (ret) {
|
|
map_write(map, CMD(0x70), adr);
|
|
chip->state = FL_STATUS;
|