Title: [3938] trunk/drivers/ata/pata_bf54x.c: Fix bug[#3666] and [#3513]
Set proper ATA UDMA mode according to sclk.
- Revision
- 3938
- Author
- sonicz
- Date
- 2007-11-26 20:54:13 -0600 (Mon, 26 Nov 2007)
Log Message
Fix bug[#3666] and [#3513] Set proper ATA UDMA mode according to sclk.
Diffstat
pata_bf54x.c | 16 ++++++++++++----
1 files changed, 12 insertions(+), 4 deletions(-)
Modified Paths
Diff
Modified: trunk/drivers/ata/pata_bf54x.c (3937 => 3938)
--- trunk/drivers/ata/pata_bf54x.c 2007-11-26 07:09:03 UTC (rev 3937)
+++ trunk/drivers/ata/pata_bf54x.c 2007-11-27 02:54:13 UTC (rev 3938)
@@ -1437,11 +1437,7 @@
| ATA_FLAG_NO_LEGACY,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0,
-#ifdef CONFIG_PATA_BF54X_DMA
- .udma_mask = ATA_UDMA5,
-#else
.udma_mask = 0,
-#endif
.port_ops = &bfin_pata_ops,
},
};
@@ -1515,6 +1511,10 @@
int board_idx = 0;
struct resource *res;
struct ata_host *host;
+#ifdef CONFIG_PATA_BF54X_DMA
+ unsigned int fsclk = get_sclk();
+ int udma_mode = 5;
+#endif
const struct ata_port_info *ppi[] =
{ &bfin_port_info[board_idx], NULL };
@@ -1533,6 +1533,14 @@
if (res == NULL)
return -EINVAL;
+#ifdef CONFIG_PATA_BF54X_DMA
+ bfin_port_info[board_idx].udma_mask = ATA_UDMA5;
+ while (udma_mode > 0 && udma_fsclk[udma_mode] > fsclk) {
+ udma_mode--;
+ bfin_port_info[board_idx].udma_mask >>= 1;
+ }
+#endif
+
/*
* Now that that's out of the way, wire up the port..
*/
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