diff options
Diffstat (limited to 'drivers/ide/pci/it8213.c')
| -rw-r--r-- | drivers/ide/pci/it8213.c | 360 |
1 files changed, 360 insertions, 0 deletions
diff --git a/drivers/ide/pci/it8213.c b/drivers/ide/pci/it8213.c new file mode 100644 index 000000000000..424f00bb160d --- /dev/null +++ b/drivers/ide/pci/it8213.c @@ -0,0 +1,360 @@ +/* + * ITE 8213 IDE driver + * + * Copyright (C) 2006 Jack Lee + * Copyright (C) 2006 Alan Cox + * Copyright (C) 2007 Bartlomiej Zolnierkiewicz + */ + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/delay.h> +#include <linux/hdreg.h> +#include <linux/ide.h> +#include <linux/init.h> + +#include <asm/io.h> + +/* + * it8213_ratemask - Compute available modes + * @drive: IDE drive + * + * Compute the available speeds for the devices on the interface. This + * is all modes to ATA133 clipped by drive cable setup. + */ + +static u8 it8213_ratemask (ide_drive_t *drive) +{ + u8 mode = 4; + if (!eighty_ninty_three(drive)) + mode = min_t(u8, mode, 1); + return mode; +} + +/** + * it8213_dma_2_pio - return the PIO mode matching DMA + * @xfer_rate: transfer speed + * + * Returns the nearest equivalent PIO timing for the PIO or 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: + case XFER_PIO_4: + return 4; + case XFER_MW_DMA_1: + case XFER_PIO_3: + return 3; + case XFER_SW_DMA_2: + case XFER_PIO_2: + return 2; + case XFER_MW_DMA_0: + case XFER_SW_DMA_1: + case XFER_SW_DMA_0: + case XFER_PIO_1: + case XFER_PIO_0: + case XFER_PIO_SLOW: + default: + return 0; + } +} + +/* + * it8213_tuneproc - tune a drive + * @drive: drive to tune + * @pio: desired PIO mode + * + * Set the interface PIO mode. + */ + +static void it8213_tuneproc (ide_drive_t *drive, u8 pio) +{ + ide_hwif_t *hwif = HWIF(drive); + struct pci_dev *dev = hwif->pci_dev; + int is_slave = drive->dn & 1; + int master_port = 0x40; + int slave_port = 0x44; + unsigned long flags; + u16 master_data; + u8 slave_data; + static DEFINE_SPINLOCK(tune_lock); + int control = 0; + + static const u8 timings[][2]= { + { 0, 0 }, + { 0, 0 }, + { 1, 0 }, + { 2, 1 }, + { 2, 3 }, }; + + pio = ide_get_best_pio_mode(drive, pio, 4, NULL); + + spin_lock_irqsave(&tune_lock, flags); + pci_read_config_word(dev, master_port, &master_data); + + if (pio > 1) + control |= 1; /* Programmable timing on */ + if (drive->media != ide_disk) + control |= 4; /* ATAPI */ + if (pio > 2) + control |= 2; /* IORDY */ + if (is_slave) { + master_data |= 0x4000; + master_data &= ~0x0070; + if (pio > 1) + master_data = master_data | (control << 4); + pci_read_config_byte(dev, slave_port, &slave_data); + slave_data = slave_data & 0xf0; + slave_data = slave_data | (timings[pio][0] << 2) | timings[pio][1]; + } else { + master_data &= ~0x3307; + if (pio > 1) + master_data = master_data | control; + master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8); + } + pci_write_config_word(dev, master_port, master_data); + if (is_slave) + pci_write_config_byte(dev, slave_port, slave_data); + spin_unlock_irqrestore(&tune_lock, flags); +} + +/** + * it8213_tune_chipset - set controller timings + * @drive: Drive to set up + * @xferspeed: speed we want to achieve + * + * Tune the ITE chipset for the desired mode. If we can't achieve + * the desired mode then tune for a lower one, but ultimately + * make the thing work. + */ + +static int it8213_tune_chipset (ide_drive_t *drive, u8 xferspeed) +{ + + ide_hwif_t *hwif = HWIF(drive); + struct pci_dev *dev = hwif->pci_dev; + u8 maslave = 0x40; + u8 speed = ide_rate_filter(it8213_ratemask(drive), xferspeed); + int a_speed = 3 << (drive->dn * 4); + int u_flag = 1 << drive->dn; + int v_flag = 0x01 << drive->dn; + int w_flag = 0x10 << drive->dn; + int u_speed = 0; + u16 reg4042, reg4a; + u8 reg48, reg54, reg55; + + pci_read_config_word(dev, maslave, ®4042); + pci_read_config_byte(dev, 0x48, ®48); + pci_read_config_word(dev, 0x4a, ®4a); + pci_read_config_byte(dev, 0x54, ®54); + pci_read_config_byte(dev, 0x55, ®55); + + switch(speed) { + case XFER_UDMA_6: + case XFER_UDMA_4: + case XFER_UDMA_2: u_speed = 2 << (drive->dn * 4); break; + case XFER_UDMA_5: + case XFER_UDMA_3: + case XFER_UDMA_1: u_speed = 1 << (drive->dn * 4); break; + case XFER_UDMA_0: u_speed = 0 << (drive->dn * 4); break; + break; + case XFER_MW_DMA_2: + case XFER_MW_DMA_1: + case XFER_SW_DMA_2: + break; + case XFER_PIO_4: + case XFER_PIO_3: + case XFER_PIO_2: + case XFER_PIO_1: + case XFER_PIO_0: + break; + default: + return -1; + } + + if (speed >= XFER_UDMA_0) { + if (!(reg48 & u_flag)) + pci_write_config_byte(dev, 0x48, reg48 | u_flag); + if (speed >= XFER_UDMA_5) { + pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag); + } else { + pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag); + } + + if ((reg4a & a_speed) != u_speed) + pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed); + if (speed > XFER_UDMA_2) { + if (!(reg54 & v_flag)) + pci_write_config_byte(dev, 0x54, reg54 | v_flag); + } else + pci_write_config_byte(dev, 0x54, reg54 & ~v_flag); + } else { + if (reg48 & u_flag) + pci_write_config_byte(dev, 0x48, reg48 & ~u_flag); + if (reg4a & a_speed) + pci_write_config_word(dev, 0x4a, reg4a & ~a_speed); + if (reg54 & v_flag) + pci_write_config_byte(dev, 0x54, reg54 & ~v_flag); + if (reg55 & w_flag) + pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag); + } + it8213_tuneproc(drive, it8213_dma_2_pio(speed)); + return ide_config_drive_speed(drive, speed); +} + +/* + * config_chipset_for_dma - configure for DMA + * @drive: drive to configure + * + * Called by the IDE layer when it wants the timings set up. + */ + +static int config_chipset_for_dma (ide_drive_t *drive) +{ + u8 speed = ide_dma_speed(drive, it8213_ratemask(drive)); + + if (!speed) + return 0; + + it8213_tune_chipset(drive, speed); + + return ide_dma_enable(drive); +} + +/** + * it8213_configure_drive_for_dma - set up for DMA transfers + * @drive: drive we are going to set up + * + * Set up the drive for DMA, tune the controller and drive as + * required. If the drive isn't suitable for DMA or we hit + * other problems then we will drop down to PIO and set up + * PIO appropriately + */ + +static int it8213_config_drive_for_dma (ide_drive_t *drive) +{ + u8 pio; + + if (ide_use_dma(drive) && config_chipset_for_dma(drive)) + return 0; + + pio = ide_get_best_pio_mode(drive, 255, 4, NULL); + it8213_tune_chipset(drive, XFER_PIO_0 + pio); + + return -1; +} + +/** + * init_hwif_it8213 - set up hwif structs + * @hwif: interface to set up + * + * We do the basic set up of the interface structure. The IT8212 + * requires several custom handlers so we override the default + * ide DMA handlers appropriately + */ + +static void __devinit init_hwif_it8213(ide_hwif_t *hwif) +{ + u8 reg42h = 0, ata66 = 0; + + hwif->speedproc = &it8213_tune_chipset; + hwif->tuneproc = &it8213_tuneproc; + + hwif->autodma = 0; + + hwif->drives[0].autotune = 1; + hwif->drives[1].autotune = 1; + + if (!hwif->dma_base) + return; + + hwif->atapi_dma = 1; + hwif->ultra_mask = 0x7f; + hwif->mwdma_mask = 0x06; + hwif->swdma_mask = 0x04; + + pci_read_config_byte(hwif->pci_dev, 0x42, ®42h); + ata66 = (reg42h & 0x02) ? 0 : 1; + + hwif->ide_dma_check = &it8213_config_drive_for_dma; + if (!(hwif->udma_four)) + hwif->udma_four = ata66; + + /* + * The BIOS often doesn't set up DMA on this controller + * so we always do it. + */ + if (!noautodma) + hwif->autodma = 1; + + hwif->drives[0].autodma = hwif->autodma; + hwif->drives[1].autodma = hwif->autodma; +} + + +#define DECLARE_ITE_DEV(name_str) \ + { \ + .name = name_str, \ + .init_hwif = init_hwif_it8213, \ + .channels = 1, \ + .autodma = AUTODMA, \ + .enablebits = {{0x41,0x80,0x80}}, \ + .bootable = ON_BOARD, \ + } + +static ide_pci_device_t it8213_chipsets[] __devinitdata = { + /* 0 */ DECLARE_ITE_DEV("IT8213"), +}; + + +/** + * it8213_init_one - pci layer discovery entry + * @dev: PCI device + * @id: ident table entry + * + * Called by the PCI code when it finds an ITE8213 controller. As + * this device follows the standard interfaces we can use the + * standard helper functions to do almost all the work for us. + */ + +static int __devinit it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id) +{ + ide_setup_pci_device(dev, &it8213_chipsets[id->driver_data]); + return 0; +} + + +static struct pci_device_id it8213_pci_tbl[] = { + { PCI_VENDOR_ID_ITE, 0x8213, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, + { 0, }, +}; + +MODULE_DEVICE_TABLE(pci, it8213_pci_tbl); + +static struct pci_driver driver = { + .name = "ITE8213_IDE", + .id_table = it8213_pci_tbl, + .probe = it8213_init_one, +}; + +static int __init it8213_ide_init(void) +{ + return ide_pci_register_driver(&driver); +} + +module_init(it8213_ide_init); + +MODULE_AUTHOR("Jack Lee, Alan Cox"); +MODULE_DESCRIPTION("PCI driver module for the ITE 8213"); +MODULE_LICENSE("GPL"); |