From: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
Subject: [PATCH] alim15x3: fix handling of address setup timings
Account for the requirements of the other device on the port.
Based on libata pata_ali host driver.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
drivers/ide/alim15x3.c | 11 +++++++++++
1 file changed, 11 insertions(+)
Index: b/drivers/ide/alim15x3.c
===================================================================
--- a/drivers/ide/alim15x3.c
+++ b/drivers/ide/alim15x3.c
@@ -72,6 +72,7 @@ static void ali_fifo_control(ide_hwif_t
static void ali_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
{
struct pci_dev *dev = to_pci_dev(hwif->dev);
+ ide_drive_t *pair = ide_get_pair_dev(drive);
int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
unsigned long T = 1000000 / bus_speed; /* PCI clock based */
int port = hwif->channel ? 0x5c : 0x58;
@@ -79,6 +80,16 @@ static void ali_set_pio_mode(ide_hwif_t
struct ide_timing t;
ide_timing_compute(drive, drive->pio_mode, &t, T, 1);
+ if (pair) {
+ struct ide_timing p;
+
+ ide_timing_compute(pair, pair->pio_mode, &p, T, 1);
+ ide_timing_merge(&p, &t, &t, IDE_TIMING_SETUP);
+ if (pair->dma_mode) {
+ ide_timing_compute(pair, pair->dma_mode, &p, T, 1);
+ ide_timing_merge(&p, &t, &t, IDE_TIMING_SETUP);
+ }
+ }
t.setup = clamp_val(t.setup, 1, 8) & 7;
t.active = clamp_val(t.active, 1, 8) & 7;
--
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