diff options
Diffstat (limited to 'drivers/ata/pata_sil680.c')
| -rw-r--r-- | drivers/ata/pata_sil680.c | 94 |
1 files changed, 54 insertions, 40 deletions
diff --git a/drivers/ata/pata_sil680.c b/drivers/ata/pata_sil680.c index 31f759b0ab7..b92eacf8dd3 100644 --- a/drivers/ata/pata_sil680.c +++ b/drivers/ata/pata_sil680.c @@ -38,11 +38,12 @@ /** * sil680_selreg - return register base - * @hwif: interface + * @ap: ATA interface * @r: config offset * - * Turn a config register offset into the right address in either - * PCI space or MMIO space to access the control register in question + * Turn a config register offset into the right address in PCI space + * to access the control register in question. + * * Thankfully this is a configuration operation so isn't performance * criticial. */ @@ -56,12 +57,12 @@ static unsigned long sil680_selreg(struct ata_port *ap, int r) /** * sil680_seldev - return register base - * @hwif: interface + * @ap: ATA interface * @r: config offset * - * Turn a config register offset into the right address in either - * PCI space or MMIO space to access the control register in question - * including accounting for the unit shift. + * Turn a config register offset into the right address in PCI space + * to access the control register in question including accounting for + * the unit shift. */ static unsigned long sil680_seldev(struct ata_port *ap, struct ata_device *adev, int r) @@ -81,7 +82,8 @@ static unsigned long sil680_seldev(struct ata_port *ap, struct ata_device *adev, * space for us. */ -static int sil680_cable_detect(struct ata_port *ap) { +static int sil680_cable_detect(struct ata_port *ap) +{ struct pci_dev *pdev = to_pci_dev(ap->host->dev); unsigned long addr = sil680_selreg(ap, 0); u8 ata66; @@ -93,7 +95,7 @@ static int sil680_cable_detect(struct ata_port *ap) { } /** - * sil680_set_piomode - set initial PIO mode data + * sil680_set_piomode - set PIO mode data * @ap: ATA interface * @adev: ATA device * @@ -104,8 +106,12 @@ static int sil680_cable_detect(struct ata_port *ap) { static void sil680_set_piomode(struct ata_port *ap, struct ata_device *adev) { - static u16 speed_p[5] = { 0x328A, 0x2283, 0x1104, 0x10C3, 0x10C1 }; - static u16 speed_t[5] = { 0x328A, 0x2283, 0x1281, 0x10C3, 0x10C1 }; + static const u16 speed_p[5] = { + 0x328A, 0x2283, 0x1104, 0x10C3, 0x10C1 + }; + static const u16 speed_t[5] = { + 0x328A, 0x2283, 0x1281, 0x10C3, 0x10C1 + }; unsigned long tfaddr = sil680_selreg(ap, 0x02); unsigned long addr = sil680_seldev(ap, adev, 0x04); @@ -140,22 +146,23 @@ static void sil680_set_piomode(struct ata_port *ap, struct ata_device *adev) } /** - * sil680_set_dmamode - set initial DMA mode data + * sil680_set_dmamode - set DMA mode data * @ap: ATA interface * @adev: ATA device * - * Program the MWDMA/UDMA modes for the sil680 k - * chipset. The MWDMA mode values are pulled from a lookup table + * Program the MWDMA/UDMA modes for the sil680 chipset. + * + * The MWDMA mode values are pulled from a lookup table * while the chipset uses mode number for UDMA. */ static void sil680_set_dmamode(struct ata_port *ap, struct ata_device *adev) { - static u8 ultra_table[2][7] = { + static const u8 ultra_table[2][7] = { { 0x0C, 0x07, 0x05, 0x04, 0x02, 0x01, 0xFF }, /* 100MHz */ { 0x0F, 0x0B, 0x07, 0x05, 0x03, 0x02, 0x01 }, /* 133Mhz */ }; - static u16 dma_table[3] = { 0x2208, 0x10C2, 0x10C1 }; + static const u16 dma_table[3] = { 0x2208, 0x10C2, 0x10C1 }; struct pci_dev *pdev = to_pci_dev(ap->host->dev); unsigned long ma = sil680_seldev(ap, adev, 0x08); @@ -175,7 +182,7 @@ static void sil680_set_dmamode(struct ata_port *ap, struct ata_device *adev) mode &= ~(0x03 << port_shift); /* Extract scsc */ - scsc = (scsc & 0x30) ? 1: 0; + scsc = (scsc & 0x30) ? 1 : 0; if (adev->dma_mode >= XFER_UDMA_0) { multi = 0x10C1; @@ -248,7 +255,7 @@ static u8 sil680_init_chip(struct pci_dev *pdev, int *try_mmio) { u8 tmpbyte = 0; - /* FIXME: double check */ + /* FIXME: double check */ pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, pdev->revision ? 1 : 255); @@ -266,22 +273,22 @@ static u8 sil680_init_chip(struct pci_dev *pdev, int *try_mmio) *try_mmio = (tmpbyte & 1) || pci_resource_start(pdev, 5); #endif - switch(tmpbyte & 0x30) { - case 0x00: - /* 133 clock attempt to force it on */ - pci_write_config_byte(pdev, 0x8A, tmpbyte|0x10); - break; - case 0x30: - /* if clocking is disabled */ - /* 133 clock attempt to force it on */ - pci_write_config_byte(pdev, 0x8A, tmpbyte & ~0x20); - break; - case 0x10: - /* 133 already */ - break; - case 0x20: - /* BIOS set PCI x2 clocking */ - break; + switch (tmpbyte & 0x30) { + case 0x00: + /* 133 clock attempt to force it on */ + pci_write_config_byte(pdev, 0x8A, tmpbyte|0x10); + break; + case 0x30: + /* if clocking is disabled */ + /* 133 clock attempt to force it on */ + pci_write_config_byte(pdev, 0x8A, tmpbyte & ~0x20); + break; + case 0x10: + /* 133 already */ + break; + case 0x20: + /* BIOS set PCI x2 clocking */ + break; } pci_read_config_byte(pdev, 0x8A, &tmpbyte); @@ -299,12 +306,19 @@ static u8 sil680_init_chip(struct pci_dev *pdev, int *try_mmio) pci_write_config_dword(pdev, 0xB8, 0x43924392); pci_write_config_dword(pdev, 0xBC, 0x40094009); - switch(tmpbyte & 0x30) { - case 0x00: printk(KERN_INFO "sil680: 100MHz clock.\n");break; - case 0x10: printk(KERN_INFO "sil680: 133MHz clock.\n");break; - case 0x20: printk(KERN_INFO "sil680: Using PCI clock.\n");break; - /* This last case is _NOT_ ok */ - case 0x30: printk(KERN_ERR "sil680: Clock disabled ?\n"); + switch (tmpbyte & 0x30) { + case 0x00: + printk(KERN_INFO "sil680: 100MHz clock.\n"); + break; + case 0x10: + printk(KERN_INFO "sil680: 133MHz clock.\n"); + break; + case 0x20: + printk(KERN_INFO "sil680: Using PCI clock.\n"); + break; + /* This last case is _NOT_ ok */ + case 0x30: + printk(KERN_ERR "sil680: Clock disabled ?\n"); } return tmpbyte & 0x30; } |