From 70cd071e4ecc06c985189665af75c108601fd5a3 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 27 Nov 2007 19:43:40 +0900 Subject: libata: clean up xfermode / PATA timing related stuff * s/ATA_BITS_(PIO|MWDMA|UDMA)/ATA_NR_\1_MODES/g * Consistently use 0xff to indicate invalid transfer mode (0x00 is valid for PIO_SLOW). * Make ata_xfer_mode2mask() return proper mode mask instead of just the highest bit. * Sort ata_timing table in increasing xfermode order and update ata_timing_find_mode() accordingly. This patch doesn't introduce any behavior change. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- include/linux/libata.h | 21 ++++++++++++--------- 1 file changed, 12 insertions(+), 9 deletions(-) (limited to 'include/linux/libata.h') diff --git a/include/linux/libata.h b/include/linux/libata.h index 083dd77b120..e2ed3bac8c5 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -269,17 +269,20 @@ enum { /* encoding various smaller bitmaps into a single * unsigned int bitmap */ - ATA_BITS_PIO = 7, - ATA_BITS_MWDMA = 5, - ATA_BITS_UDMA = 8, + ATA_NR_PIO_MODES = 7, + ATA_NR_MWDMA_MODES = 5, + ATA_NR_UDMA_MODES = 8, ATA_SHIFT_PIO = 0, - ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO, - ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA, - - ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO, - ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA, - ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA, + ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES, + ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES, + + ATA_MASK_PIO = ((1 << ATA_NR_PIO_MODES) - 1) + << ATA_SHIFT_PIO, + ATA_MASK_MWDMA = ((1 << ATA_NR_MWDMA_MODES) - 1) + << ATA_SHIFT_MWDMA, + ATA_MASK_UDMA = ((1 << ATA_NR_UDMA_MODES) - 1) + << ATA_SHIFT_UDMA, /* size of buffer to pad xfers ending on unaligned boundaries */ ATA_DMA_PAD_SZ = 4, -- cgit v1.2.3