From c15d5d43e6eed180e275f1db296eab5560a1bf59 Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Thu, 11 Oct 2007 23:54:01 +0200 Subject: ide-pmac: PIO mode setup fixes (take 3) * Add { 0, 0 } entry to {kauai,shasta}_pio_timings[] so kauai_lookup_timing() always returns a valid PIO timing (fixes PIO timing not being set for devices with minimum PIO cycle <= 120ns). * Add setting transfer mode on the device to pmac_ide_set_pio_mode(). * Fix pmac_ide_set_pio() to always program chipset for given PIO timing instead of only when the device we want to program PIO timing for is the currently selected one. * Now that pmac_ide_set_pio() is fixed there is no need to set transfer mode on the device and program chipset for PIO in pmac_ide_tune_chipset() (returning 0 == success is not entirely correct but is OK for now since the upper layers are only checking ->speedproc return value for DMA modes). v2: * s/speed/XFER_PIO_0 + pio/ in pmac_ide_set_pio_mode() so it actually compiles. * Removal of kauai_lookup_timing() return value checking went to separate patch. v3: * Use XFER_PIO_0 not XFER_PIO. (Noticed by Ben) Cc: Benjamin Herrenschmidt Cc: Sergei Shtylyov Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ppc/pmac.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) (limited to 'drivers/ide/ppc') diff --git a/drivers/ide/ppc/pmac.c b/drivers/ide/ppc/pmac.c index beafdf3c1124..4da251882cc1 100644 --- a/drivers/ide/ppc/pmac.c +++ b/drivers/ide/ppc/pmac.c @@ -6,6 +6,7 @@ * for doing DMA. * * Copyright (C) 1998-2003 Paul Mackerras & Ben. Herrenschmidt + * Copyright (C) 2007 Bartlomiej Zolnierkiewicz * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -311,7 +312,8 @@ static struct kauai_timing kauai_pio_timings[] = { 240 , 0x0800038b }, { 239 , 0x0800030c }, { 180 , 0x05000249 }, - { 120 , 0x04000148 } + { 120 , 0x04000148 }, + { 0 , 0 }, }; static struct kauai_timing kauai_mdma_timings[] = @@ -351,7 +353,8 @@ static struct kauai_timing shasta_pio_timings[] = { 240 , 0x040003cd }, { 239 , 0x040003cd }, { 180 , 0x0400028b }, - { 120 , 0x0400010a } + { 120 , 0x0400010a }, + { 0 , 0 }, }; static struct kauai_timing shasta_mdma_timings[] = @@ -695,8 +698,10 @@ pmac_ide_set_pio_mode(ide_drive_t *drive, const u8 pio) drive->name, pio, *timings); #endif - if (drive->select.all == HWIF(drive)->INB(IDE_SELECT_REG)) - pmac_ide_do_update_timings(drive); + if (pmac_ide_do_setfeature(drive, XFER_PIO_0 + pio)) + return; + + pmac_ide_do_update_timings(drive); } #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC @@ -965,7 +970,7 @@ static int pmac_ide_tune_chipset(ide_drive_t *drive, const u8 speed) case XFER_PIO_1: case XFER_PIO_0: pmac_ide_set_pio_mode(drive, speed & 0x07); - break; + return 0; default: ret = 1; } -- cgit v1.2.2