diff options
Diffstat (limited to 'kernel/drivers/ide/it8213.c')
| -rw-r--r-- | kernel/drivers/ide/it8213.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/kernel/drivers/ide/it8213.c b/kernel/drivers/ide/it8213.c new file mode 100644 index 000000000..6b9284668 --- /dev/null +++ b/kernel/drivers/ide/it8213.c @@ -0,0 +1,216 @@ +/* + * 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/ide.h> +#include <linux/init.h> + +#define DRV_NAME "it8213" + +/** + * it8213_set_pio_mode - set host controller for PIO mode + * @hwif: port + * @drive: drive + * + * Set the interface PIO mode. + */ + +static void it8213_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive) +{ + struct pci_dev *dev = to_pci_dev(hwif->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; + const u8 pio = drive->pio_mode - XFER_PIO_0; + + static const u8 timings[][2] = { + { 0, 0 }, + { 0, 0 }, + { 1, 0 }, + { 2, 1 }, + { 2, 3 }, }; + + 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 (ide_pio_need_iordy(drive, pio)) + 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_set_dma_mode - set host controller for DMA mode + * @hwif: port + * @drive: drive + * + * Tune the ITE chipset for the DMA mode. + */ + +static void it8213_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive) +{ + struct pci_dev *dev = to_pci_dev(hwif->dev); + u8 maslave = 0x40; + 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; + const u8 speed = drive->dma_mode; + + 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); + + if (speed >= XFER_UDMA_0) { + u8 udma = speed - XFER_UDMA_0; + + u_speed = min_t(u8, 2 - (udma & 1), udma) << (drive->dn * 4); + + 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 { + 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) + 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); + + if (speed >= XFER_MW_DMA_0) + drive->pio_mode = + mwdma_to_pio[speed - XFER_MW_DMA_0] + XFER_PIO_0; + else + drive->pio_mode = XFER_PIO_2; /* for SWDMA2 */ + + it8213_set_pio_mode(hwif, drive); + } +} + +static u8 it8213_cable_detect(ide_hwif_t *hwif) +{ + struct pci_dev *dev = to_pci_dev(hwif->dev); + u8 reg42h = 0; + + pci_read_config_byte(dev, 0x42, ®42h); + + return (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80; +} + +static const struct ide_port_ops it8213_port_ops = { + .set_pio_mode = it8213_set_pio_mode, + .set_dma_mode = it8213_set_dma_mode, + .cable_detect = it8213_cable_detect, +}; + +static const struct ide_port_info it8213_chipset = { + .name = DRV_NAME, + .enablebits = { {0x41, 0x80, 0x80} }, + .port_ops = &it8213_port_ops, + .host_flags = IDE_HFLAG_SINGLE, + .pio_mask = ATA_PIO4, + .swdma_mask = ATA_SWDMA2_ONLY, + .mwdma_mask = ATA_MWDMA12_ONLY, + .udma_mask = ATA_UDMA6, +}; + +/** + * 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 it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id) +{ + return ide_pci_init_one(dev, &it8213_chipset, NULL); +} + +static const struct pci_device_id it8213_pci_tbl[] = { + { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8213), 0 }, + { 0, }, +}; + +MODULE_DEVICE_TABLE(pci, it8213_pci_tbl); + +static struct pci_driver it8213_pci_driver = { + .name = "ITE8213_IDE", + .id_table = it8213_pci_tbl, + .probe = it8213_init_one, + .remove = ide_pci_remove, + .suspend = ide_pci_suspend, + .resume = ide_pci_resume, +}; + +static int __init it8213_ide_init(void) +{ + return ide_pci_register_driver(&it8213_pci_driver); +} + +static void __exit it8213_ide_exit(void) +{ + pci_unregister_driver(&it8213_pci_driver); +} + +module_init(it8213_ide_init); +module_exit(it8213_ide_exit); + +MODULE_AUTHOR("Jack Lee, Alan Cox"); +MODULE_DESCRIPTION("PCI driver module for the ITE 8213"); +MODULE_LICENSE("GPL"); |