From 021ee9a6da1cfc57f6a6c769c3c898bdd4753108 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 18 Dec 2007 16:33:06 +0900 Subject: libata: reimplement ata_acpi_cbl_80wire() using ata_acpi_gtm_xfermask() Reimplement ata_acpi_cbl_80wire() using ata_acpi_gtm_xfermask() and while at it relocate the function below ata_acpi_gtm_xfermask(). New ata_acpi_cbl_80wire() implementation takes @gtm, in both pata_via and pata_amd, use the initial GTM value. Both are trying to peek initial BIOS configuration, so using initial caching value makes sense. This fixes ACPI part of cable detection in pata_amd which previously always returned 0 because configuring PIO0 during reset clears DMA configuration. Signed-off-by: Tejun Heo Cc: Alan Cox Signed-off-by: Jeff Garzik --- drivers/ata/libata-acpi.c | 41 ++++++++++++++++------------------------- 1 file changed, 16 insertions(+), 25 deletions(-) (limited to 'drivers/ata/libata-acpi.c') diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c index a6f1a6b56d8c..9e8ec19260af 100644 --- a/drivers/ata/libata-acpi.c +++ b/drivers/ata/libata-acpi.c @@ -490,38 +490,29 @@ EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); /** * ata_acpi_cbl_80wire - Check for 80 wire cable * @ap: Port to check + * @gtm: GTM data to use * - * Return 1 if the ACPI mode data for this port indicates the BIOS selected - * an 80wire mode. + * Return 1 if the @gtm indicates the BIOS selected an 80wire mode. */ - -int ata_acpi_cbl_80wire(struct ata_port *ap) +int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm) { - const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); - int valid = 0; + struct ata_device *dev; - if (!gtm) - return 0; + ata_link_for_each_dev(dev, &ap->link) { + unsigned long xfer_mask, udma_mask; + + if (!ata_dev_enabled(dev)) + continue; + + xfer_mask = ata_acpi_gtm_xfermask(dev, gtm); + ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask); + + if (udma_mask & ~ATA_UDMA_MASK_40C) + return 1; + } - /* Split timing, DMA enabled */ - if ((gtm->flags & 0x11) == 0x11 && gtm->drive[0].dma < 55) - valid |= 1; - if ((gtm->flags & 0x14) == 0x14 && gtm->drive[1].dma < 55) - valid |= 2; - /* Shared timing, DMA enabled */ - if ((gtm->flags & 0x11) == 0x01 && gtm->drive[0].dma < 55) - valid |= 1; - if ((gtm->flags & 0x14) == 0x04 && gtm->drive[0].dma < 55) - valid |= 2; - - /* Drive check */ - if ((valid & 1) && ata_dev_enabled(&ap->link.device[0])) - return 1; - if ((valid & 2) && ata_dev_enabled(&ap->link.device[1])) - return 1; return 0; } - EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); static void ata_acpi_gtf_to_tf(struct ata_device *dev, -- cgit v1.2.3-59-g8ed1b