Hello.
David Daney wrote:
The forthcoming OCTEON SOC Compact Flash driver needs a few more
timing values than were available in the ata_timing table. I add new
columns for write_hold and dmack_hold times. The values were obtained
from the Compact Flash specification Rev 4.1.
Signed-off-by: David Daney <ddaney@xxxxxxxxxxxxxxxxxx>
Well, you got it right except fot the SWDMA modes. :-)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 5e2eb74..b156d83 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2953,33 +2953,33 @@ int sata_set_spd(struct ata_link *link)
[...]
+ { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 30, 20, 960, 0 },
+ { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 20, 480, 0 },
+ { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 15, 20, 240, 0 },
Well, I don't know what CF 4.1 has but ATA/ATA-2 have minimum -DIOx
to -DMACK hold time (tJ) for SW DMA modes always 0 ns, and -DIOW data
hold time (tH) of 50, 30, and 20 for modes 0, 1, and 2 respectfully.
@@ -864,6 +868,8 @@ struct ata_timing {
unsigned short cyc8b; /* t0 for 8-bit I/O */
unsigned short active; /* t2 or tD */
unsigned short recover; /* t2i or tK */
+ unsigned short write_hold; /* t4 */
The comment should be "t4 or tH", to be completely correct.
MBR, Sergei
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