From 8c91abf86280a1b900619ee0d8ae1840e943110e Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Tue, 16 Oct 2007 22:29:54 +0200 Subject: [PATCH] it8213/piix/slc90e66: remove {it8213,piix,slc90e66}_dma_2_pio() Acked-by: Sergei Shtylyov Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/pci/it8213.c | 44 ++++++++++---------------------------- drivers/ide/pci/piix.c | 44 ++++++++++---------------------------- drivers/ide/pci/slc90e66.c | 33 ++++++++++------------------ 3 files changed, 33 insertions(+), 88 deletions(-) diff --git a/drivers/ide/pci/it8213.c b/drivers/ide/pci/it8213.c index ecf4ce078d..6dab0daf49 100644 --- a/drivers/ide/pci/it8213.c +++ b/drivers/ide/pci/it8213.c @@ -17,37 +17,6 @@ #include -/** - * it8213_dma_2_pio - return the PIO mode matching DMA - * @xfer_rate: transfer speed - * - * Returns the nearest equivalent PIO timing for the DMA - * mode requested by the controller. - */ - -static u8 it8213_dma_2_pio (u8 xfer_rate) { - switch(xfer_rate) { - case XFER_UDMA_6: - case XFER_UDMA_5: - case XFER_UDMA_4: - case XFER_UDMA_3: - case XFER_UDMA_2: - case XFER_UDMA_1: - case XFER_UDMA_0: - case XFER_MW_DMA_2: - return 4; - case XFER_MW_DMA_1: - return 3; - case XFER_SW_DMA_2: - return 2; - case XFER_MW_DMA_0: - case XFER_SW_DMA_1: - case XFER_SW_DMA_0: - default: - return 0; - } -} - /** * it8213_set_pio_mode - set host controller for PIO mode * @drive: drive @@ -124,7 +93,7 @@ static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed) int w_flag = 0x10 << drive->dn; int u_speed = 0; u16 reg4042, reg4a; - u8 reg48, reg54, reg55; + u8 reg48, reg54, reg55, pio; pci_read_config_word(dev, maslave, ®4042); pci_read_config_byte(dev, 0x48, ®48); @@ -165,7 +134,11 @@ static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed) pci_write_config_byte(dev, 0x54, reg54 | v_flag); } else pci_write_config_byte(dev, 0x54, reg54 & ~v_flag); + + pio = 4; } else { + const u8 mwdma_to_pio[] = { 0, 3, 4 }; + if (reg48 & u_flag) pci_write_config_byte(dev, 0x48, reg48 & ~u_flag); if (reg4a & a_speed) @@ -174,9 +147,14 @@ static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed) pci_write_config_byte(dev, 0x54, reg54 & ~v_flag); if (reg55 & w_flag) pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag); + + if (speed >= XFER_MW_DMA_0) + pio = mwdma_to_pio[speed - XFER_MW_DMA_0]; + else + pio = 2; /* only SWDMA2 is allowed */ } - it8213_set_pio_mode(drive, it8213_dma_2_pio(speed)); + it8213_set_pio_mode(drive, pio); } /** diff --git a/drivers/ide/pci/piix.c b/drivers/ide/pci/piix.c index 38c91ba649..4b397d6418 100644 --- a/drivers/ide/pci/piix.c +++ b/drivers/ide/pci/piix.c @@ -105,37 +105,6 @@ static int no_piix_dma; -/** - * piix_dma_2_pio - return the PIO mode matching DMA - * @xfer_rate: transfer speed - * - * Returns the nearest equivalent PIO timing for the DMA - * mode requested by the controller. - */ - -static u8 piix_dma_2_pio (u8 xfer_rate) { - switch(xfer_rate) { - case XFER_UDMA_6: - case XFER_UDMA_5: - case XFER_UDMA_4: - case XFER_UDMA_3: - case XFER_UDMA_2: - case XFER_UDMA_1: - case XFER_UDMA_0: - case XFER_MW_DMA_2: - return 4; - case XFER_MW_DMA_1: - return 3; - case XFER_SW_DMA_2: - return 2; - case XFER_MW_DMA_0: - case XFER_SW_DMA_1: - case XFER_SW_DMA_0: - default: - return 0; - } -} - /** * piix_set_pio_mode - set host controller for PIO mode * @drive: drive @@ -225,7 +194,7 @@ static void piix_set_dma_mode(ide_drive_t *drive, const u8 speed) int u_speed = 0; int sitre; u16 reg4042, reg4a; - u8 reg48, reg54, reg55; + u8 reg48, reg54, reg55, pio; pci_read_config_word(dev, maslave, ®4042); sitre = (reg4042 & 0x4000) ? 1 : 0; @@ -262,7 +231,11 @@ static void piix_set_dma_mode(ide_drive_t *drive, const u8 speed) pci_write_config_byte(dev, 0x54, reg54 | v_flag); } else pci_write_config_byte(dev, 0x54, reg54 & ~v_flag); + + pio = 4; } else { + const u8 mwdma_to_pio[] = { 0, 3, 4 }; + if (reg48 & u_flag) pci_write_config_byte(dev, 0x48, reg48 & ~u_flag); if (reg4a & a_speed) @@ -271,9 +244,14 @@ static void piix_set_dma_mode(ide_drive_t *drive, const u8 speed) pci_write_config_byte(dev, 0x54, reg54 & ~v_flag); if (reg55 & w_flag) pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag); + + if (speed >= XFER_MW_DMA_0) + pio = mwdma_to_pio[speed - XFER_MW_DMA_0]; + else + pio = 2; /* only SWDMA2 is allowed */ } - piix_set_pio_mode(drive, piix_dma_2_pio(speed)); + piix_set_pio_mode(drive, pio); } /** diff --git a/drivers/ide/pci/slc90e66.c b/drivers/ide/pci/slc90e66.c index 31cb0263db..772b58671b 100644 --- a/drivers/ide/pci/slc90e66.c +++ b/drivers/ide/pci/slc90e66.c @@ -21,27 +21,6 @@ #include -static u8 slc90e66_dma_2_pio (u8 xfer_rate) { - switch(xfer_rate) { - case XFER_UDMA_4: - case XFER_UDMA_3: - case XFER_UDMA_2: - case XFER_UDMA_1: - case XFER_UDMA_0: - case XFER_MW_DMA_2: - return 4; - case XFER_MW_DMA_1: - return 3; - case XFER_SW_DMA_2: - return 2; - case XFER_MW_DMA_0: - case XFER_SW_DMA_1: - case XFER_SW_DMA_0: - default: - return 0; - } -} - static void slc90e66_set_pio_mode(ide_drive_t *drive, const u8 pio) { ide_hwif_t *hwif = HWIF(drive); @@ -103,6 +82,7 @@ static void slc90e66_set_dma_mode(ide_drive_t *drive, const u8 speed) int sitre = 0, a_speed = 7 << (drive->dn * 4); int u_speed = 0, u_flag = 1 << drive->dn; u16 reg4042, reg44, reg48, reg4a; + u8 pio; pci_read_config_word(dev, maslave, ®4042); sitre = (reg4042 & 0x4000) ? 1 : 0; @@ -131,14 +111,23 @@ static void slc90e66_set_dma_mode(ide_drive_t *drive, const u8 speed) pci_read_config_word(dev, 0x4a, ®4a); pci_write_config_word(dev, 0x4a, reg4a|u_speed); } + + pio = 4; } else { + const u8 mwdma_to_pio[] = { 0, 3, 4 }; + if (reg48 & u_flag) pci_write_config_word(dev, 0x48, reg48 & ~u_flag); if (reg4a & a_speed) pci_write_config_word(dev, 0x4a, reg4a & ~a_speed); + + if (speed >= XFER_MW_DMA_0) + pio = mwdma_to_pio[speed - XFER_MW_DMA_0]; + else + pio = 2; /* only SWDMA2 is allowed */ } - slc90e66_set_pio_mode(drive, slc90e66_dma_2_pio(speed)); + slc90e66_set_pio_mode(drive, pio); } static int slc90e66_config_drive_xfer_rate (ide_drive_t *drive) -- 2.39.5