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authorAnders Grafström <grfstrm@users.sourceforge.net>2008-08-05 18:37:41 +0200
committerDavid Woodhouse <David.Woodhouse@intel.com>2008-08-06 09:44:54 +0100
commite93cafe45fd74935e0aca2b79e533f0e3ed9640f (patch)
treef30b1eb1df5eed94145ad85c05f7b911c393d046 /include/linux/mtd
parent2e489e077a6ad118c4f247faedf330117b107cce (diff)
[MTD] [NOR] cfi_cmdset_0001: Timeouts for erase, write and unlock operations
Timeouts are currently given by the typical operation time times 8. It works in the general well-behaved case but not when an erase block is failing. For erase operations, it seems that a failing erase block will keep the device state machine in erasing state until the vendor specified maximum timeout period has passed. By this time the driver would have long since timed out, left erasing state and attempted further operations which all fail. This patch implements timeouts using values from the CFI Query structure when available. The patch also sets a longer timeout for locking operations. The current value used for locking/unlocking given by 1000000/HZ microseconds is too short for devices like J3 and J5 Strataflash which have a typical clear lock-bits time of 0.5 seconds. Signed-off-by: Anders Grafström <grfstrm@users.sourceforge.net> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'include/linux/mtd')
-rw-r--r--include/linux/mtd/flashchip.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/mtd/flashchip.h b/include/linux/mtd/flashchip.h
index 08dd131301c..d4f38c5fd44 100644
--- a/include/linux/mtd/flashchip.h
+++ b/include/linux/mtd/flashchip.h
@@ -73,6 +73,10 @@ struct flchip {
int buffer_write_time;
int erase_time;
+ int word_write_time_max;
+ int buffer_write_time_max;
+ int erase_time_max;
+
void *priv;
};