From a0f79b929acaba10d4780acd2543eff20bf4b5b0 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 18 Dec 2007 16:33:05 +0900 Subject: libata: implement ata_timing_cycle2mode() and use it in libata-acpi and pata_acpi libata-acpi is using separate timing tables for transfer modes although libata-core has the complete ata_timing table. Implement ata_timing_cycle2mode() to look for matching mode given transfer type and cycle duration and use it in libata-acpi and pata_acpi to replace private timing tables. Signed-off-by: Tejun Heo Cc: Alan Cox Signed-off-by: Jeff Garzik --- drivers/ata/libata-acpi.c | 62 ++++++++++++----------------------------------- 1 file changed, 15 insertions(+), 47 deletions(-) (limited to 'drivers/ata/libata-acpi.c') diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c index 9f0b208afcf..a6f1a6b56d8 100644 --- a/drivers/ata/libata-acpi.c +++ b/drivers/ata/libata-acpi.c @@ -441,22 +441,6 @@ static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf) return rc; } -/* Welcome to ACPI, bring a bucket */ -const unsigned int ata_acpi_pio_cycle[7] = { - 600, 383, 240, 180, 120, 100, 80 -}; -EXPORT_SYMBOL_GPL(ata_acpi_pio_cycle); - -const unsigned int ata_acpi_mwdma_cycle[5] = { - 480, 150, 120, 100, 80 -}; -EXPORT_SYMBOL_GPL(ata_acpi_mwdma_cycle); - -const unsigned int ata_acpi_udma_cycle[7] = { - 120, 80, 60, 45, 30, 20, 15 -}; -EXPORT_SYMBOL_GPL(ata_acpi_udma_cycle); - /** * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter * @dev: target device @@ -473,49 +457,33 @@ EXPORT_SYMBOL_GPL(ata_acpi_udma_cycle); unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, const struct ata_acpi_gtm *gtm) { - unsigned long pio_mask = 0, mwdma_mask = 0, udma_mask = 0; - int unit, i; - u32 t; + unsigned long xfer_mask = 0; + unsigned int type; + int unit; + u8 mode; /* we always use the 0 slot for crap hardware */ unit = dev->devno; if (!(gtm->flags & 0x10)) unit = 0; - /* Values larger than the longest cycle results in 0 mask - * while values equal to smaller than the shortest cycle - * results in mask which includes all supported modes. - * Disabled transfer method has the value of 0xffffffff which - * will always result in 0 mask. - */ - - /* start by scanning for PIO modes */ - t = gtm->drive[unit].pio; - for (i = 0; i < ARRAY_SIZE(ata_acpi_pio_cycle); i++) - if (t > ata_acpi_pio_cycle[i]) - break; - pio_mask = (1 << i) - 1; + /* PIO */ + mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio); + xfer_mask |= ata_xfer_mode2mask(mode); /* See if we have MWDMA or UDMA data. We don't bother with * MWDMA if UDMA is available as this means the BIOS set UDMA * and our error changedown if it works is UDMA to PIO anyway. */ - t = gtm->drive[unit].dma; - if (!(gtm->flags & (1 << (2 * unit)))) { - /* MWDMA */ - for (i = 0; i < ARRAY_SIZE(ata_acpi_mwdma_cycle); i++) - if (t > ata_acpi_mwdma_cycle[i]) - break; - mwdma_mask = (1 << i) - 1; - } else { - /* UDMA */ - for (i = 0; i < ARRAY_SIZE(ata_acpi_udma_cycle); i++) - if (t > ata_acpi_udma_cycle[i]) - break; - udma_mask = (1 << i) - 1; - } + if (!(gtm->flags & (1 << (2 * unit)))) + type = ATA_SHIFT_MWDMA; + else + type = ATA_SHIFT_UDMA; + + mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma); + xfer_mask |= ata_xfer_mode2mask(mode); - return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); + return xfer_mask; } EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); -- cgit v1.2.3