diff options
| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2009-10-07 00:27:19 +0200 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2009-10-07 02:58:23 +0200 |
| commit | c59bcc37cb56e00ae0582339bea948853d600436 (patch) | |
| tree | 4164daee20b9db40862188da113626db89a981f5 | |
| parent | pata_atp867x: clarifications in timings calculations and cable detection (diff) | |
| download | linux-c59bcc37cb56e00ae0582339bea948853d600436.tar.xz linux-c59bcc37cb56e00ae0582339bea948853d600436.zip | |
pata_atp867x: PIO support fixes
* use 8 clk setting for active clocks == 7 (was 12 clk)
* use 12 clk setting for active clocks > 12 (was 8 clk)
* do 66MHz bus fixup before mapping active clocks
* fix setup of PIO command timings
Acked-by: Jung-Ik (John) Lee <jilee@google.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| -rw-r--r-- | drivers/ata/pata_atp867x.c | 36 |
1 files changed, 19 insertions, 17 deletions
diff --git a/drivers/ata/pata_atp867x.c b/drivers/ata/pata_atp867x.c index 27d3148b3d8e..4a2cd9a7bad1 100644 --- a/drivers/ata/pata_atp867x.c +++ b/drivers/ata/pata_atp867x.c @@ -155,30 +155,31 @@ static int atp867x_get_active_clocks_shifted(struct ata_port *ap, struct atp867x_priv *dp = ap->private_data; unsigned char clocks = clk; + /* + * Doc 6.6.9: increase the clock value by 1 for safer PIO speed + * on 66MHz bus + */ + if (dp->pci66mhz) + clocks++; + switch (clocks) { case 0: clocks = 1; break; - case 1 ... 7: - break; - case 9 ... 12: - clocks = 7; + case 1 ... 6: break; default: printk(KERN_WARNING "ATP867X: active %dclk is invalid. " - "Using default 8clk.\n", clk); + "Using 12clk.\n", clk); + case 9 ... 12: + clocks = 7; /* 12 clk */ + break; + case 7: case 8: /* default 8 clk */ clocks = 0; goto active_clock_shift_done; } - /* - * Doc 6.6.9: increase the clock value by 1 for safer PIO speed - * on 66MHz bus - */ - if (dp->pci66mhz && clocks < 7) - clocks++; - active_clock_shift_done: return clocks << ATP867X_IO_PIOSPD_ACTIVE_SHIFT; } @@ -193,7 +194,8 @@ static int atp867x_get_recover_clocks_shifted(unsigned int clk) break; case 1 ... 11: break; - case 13: case 14: + case 13: + case 14: --clocks; /* by the spec */ break; case 15: @@ -235,16 +237,16 @@ static void atp867x_set_piomode(struct ata_port *ap, struct ata_device *adev) iowrite8(b, dp->dma_mode); b = atp867x_get_active_clocks_shifted(ap, t.active) | - atp867x_get_recover_clocks_shifted(t.recover); + atp867x_get_recover_clocks_shifted(t.recover); if (adev->devno & 1) iowrite8(b, dp->slave_piospd); else iowrite8(b, dp->mstr_piospd); - /* - * use the same value for comand timing as for PIO timimg - */ + b = atp867x_get_active_clocks_shifted(ap, t.act8b) | + atp867x_get_recover_clocks_shifted(t.rec8b); + iowrite8(b, dp->eightb_piospd); } |