mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-24 05:42:59 +02:00
add a patch to revert recent breakage in the intel cfi flash driver (fixes #1140)
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6420 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
parent
e6a1045cbf
commit
464d8f3a69
@ -0,0 +1,169 @@
|
||||
--- linux.old/drivers/mtd/chips/cfi_cmdset_0001.c 2007-02-13 02:41:50.816650352 +0100
|
||||
+++ linux.dev/drivers/mtd/chips/cfi_cmdset_0001.c 2007-02-13 02:42:13.782159064 +0100
|
||||
@@ -908,7 +908,7 @@
|
||||
|
||||
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;
|
||||
@@ -917,7 +917,7 @@
|
||||
flstate_t oldstate, newstate;
|
||||
|
||||
start = xip_currtime();
|
||||
- usec = chip_op_time * 8;
|
||||
+ usec = *chip_op_time * 8;
|
||||
if (usec == 0)
|
||||
usec = 500000;
|
||||
done = 0;
|
||||
@@ -1027,8 +1027,8 @@
|
||||
#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
|
||||
|
||||
@@ -1040,65 +1040,65 @@
|
||||
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;
|
||||
@@ -1107,7 +1107,8 @@
|
||||
#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)
|
||||
@@ -1331,7 +1332,7 @@
|
||||
|
||||
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);
|
||||
@@ -1568,7 +1569,7 @@
|
||||
|
||||
ret = INVAL_CACHE_AND_WAIT(map, chip, cmd_adr,
|
||||
adr, len,
|
||||
- chip->buffer_write_time);
|
||||
+ &chip->buffer_write_time);
|
||||
if (ret) {
|
||||
map_write(map, CMD(0x70), cmd_adr);
|
||||
chip->state = FL_STATUS;
|
||||
@@ -1703,7 +1704,7 @@
|
||||
|
||||
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;
|
||||
Loading…
Reference in New Issue
Block a user