217 lines
5.5 KiB
C
Executable file
217 lines
5.5 KiB
C
Executable file
/*
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* ITE 8213 IDE driver
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*
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* Copyright (C) 2006 Jack Lee
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* Copyright (C) 2006 Alan Cox
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* Copyright (C) 2007 Bartlomiej Zolnierkiewicz
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/ide.h>
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#include <linux/init.h>
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#define DRV_NAME "it8213"
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/**
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* it8213_set_pio_mode - set host controller for PIO mode
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* @hwif: port
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* @drive: drive
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*
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* Set the interface PIO mode.
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*/
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static void it8213_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
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{
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struct pci_dev *dev = to_pci_dev(hwif->dev);
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int is_slave = drive->dn & 1;
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int master_port = 0x40;
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int slave_port = 0x44;
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unsigned long flags;
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u16 master_data;
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u8 slave_data;
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static DEFINE_SPINLOCK(tune_lock);
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int control = 0;
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const u8 pio = drive->pio_mode - XFER_PIO_0;
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static const u8 timings[][2] = {
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{ 0, 0 },
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{ 0, 0 },
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{ 1, 0 },
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{ 2, 1 },
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{ 2, 3 }, };
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spin_lock_irqsave(&tune_lock, flags);
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pci_read_config_word(dev, master_port, &master_data);
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if (pio > 1)
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control |= 1; /* Programmable timing on */
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if (drive->media != ide_disk)
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control |= 4; /* ATAPI */
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if (ide_pio_need_iordy(drive, pio))
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control |= 2; /* IORDY */
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if (is_slave) {
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master_data |= 0x4000;
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master_data &= ~0x0070;
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if (pio > 1)
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master_data = master_data | (control << 4);
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pci_read_config_byte(dev, slave_port, &slave_data);
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slave_data = slave_data & 0xf0;
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slave_data = slave_data | (timings[pio][0] << 2) | timings[pio][1];
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} else {
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master_data &= ~0x3307;
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if (pio > 1)
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master_data = master_data | control;
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master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8);
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}
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pci_write_config_word(dev, master_port, master_data);
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if (is_slave)
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pci_write_config_byte(dev, slave_port, slave_data);
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spin_unlock_irqrestore(&tune_lock, flags);
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}
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/**
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* it8213_set_dma_mode - set host controller for DMA mode
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* @hwif: port
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* @drive: drive
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*
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* Tune the ITE chipset for the DMA mode.
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*/
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static void it8213_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
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{
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struct pci_dev *dev = to_pci_dev(hwif->dev);
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u8 maslave = 0x40;
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int a_speed = 3 << (drive->dn * 4);
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int u_flag = 1 << drive->dn;
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int v_flag = 0x01 << drive->dn;
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int w_flag = 0x10 << drive->dn;
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int u_speed = 0;
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u16 reg4042, reg4a;
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u8 reg48, reg54, reg55;
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const u8 speed = drive->dma_mode;
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pci_read_config_word(dev, maslave, ®4042);
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pci_read_config_byte(dev, 0x48, ®48);
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pci_read_config_word(dev, 0x4a, ®4a);
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pci_read_config_byte(dev, 0x54, ®54);
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pci_read_config_byte(dev, 0x55, ®55);
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if (speed >= XFER_UDMA_0) {
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u8 udma = speed - XFER_UDMA_0;
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u_speed = min_t(u8, 2 - (udma & 1), udma) << (drive->dn * 4);
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if (!(reg48 & u_flag))
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pci_write_config_byte(dev, 0x48, reg48 | u_flag);
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if (speed >= XFER_UDMA_5)
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pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag);
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else
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pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
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if ((reg4a & a_speed) != u_speed)
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pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed);
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if (speed > XFER_UDMA_2) {
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if (!(reg54 & v_flag))
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pci_write_config_byte(dev, 0x54, reg54 | v_flag);
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} else
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pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
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} else {
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const u8 mwdma_to_pio[] = { 0, 3, 4 };
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if (reg48 & u_flag)
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pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
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if (reg4a & a_speed)
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pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
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if (reg54 & v_flag)
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pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
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if (reg55 & w_flag)
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pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
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if (speed >= XFER_MW_DMA_0)
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drive->pio_mode =
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mwdma_to_pio[speed - XFER_MW_DMA_0] + XFER_PIO_0;
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else
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drive->pio_mode = XFER_PIO_2; /* for SWDMA2 */
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it8213_set_pio_mode(hwif, drive);
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}
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}
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static u8 it8213_cable_detect(ide_hwif_t *hwif)
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{
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struct pci_dev *dev = to_pci_dev(hwif->dev);
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u8 reg42h = 0;
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pci_read_config_byte(dev, 0x42, ®42h);
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return (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
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}
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static const struct ide_port_ops it8213_port_ops = {
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.set_pio_mode = it8213_set_pio_mode,
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.set_dma_mode = it8213_set_dma_mode,
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.cable_detect = it8213_cable_detect,
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};
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static const struct ide_port_info it8213_chipset = {
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.name = DRV_NAME,
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.enablebits = { {0x41, 0x80, 0x80} },
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.port_ops = &it8213_port_ops,
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.host_flags = IDE_HFLAG_SINGLE,
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.pio_mask = ATA_PIO4,
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.swdma_mask = ATA_SWDMA2_ONLY,
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.mwdma_mask = ATA_MWDMA12_ONLY,
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.udma_mask = ATA_UDMA6,
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};
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/**
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* it8213_init_one - pci layer discovery entry
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* @dev: PCI device
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* @id: ident table entry
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*
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* Called by the PCI code when it finds an ITE8213 controller. As
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* this device follows the standard interfaces we can use the
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* standard helper functions to do almost all the work for us.
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*/
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static int it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id)
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{
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return ide_pci_init_one(dev, &it8213_chipset, NULL);
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}
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static const struct pci_device_id it8213_pci_tbl[] = {
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{ PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8213), 0 },
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{ 0, },
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};
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MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);
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static struct pci_driver it8213_pci_driver = {
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.name = "ITE8213_IDE",
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.id_table = it8213_pci_tbl,
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.probe = it8213_init_one,
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.remove = ide_pci_remove,
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.suspend = ide_pci_suspend,
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.resume = ide_pci_resume,
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};
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static int __init it8213_ide_init(void)
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{
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return ide_pci_register_driver(&it8213_pci_driver);
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}
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static void __exit it8213_ide_exit(void)
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{
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pci_unregister_driver(&it8213_pci_driver);
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}
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module_init(it8213_ide_init);
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module_exit(it8213_ide_exit);
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MODULE_AUTHOR("Jack Lee, Alan Cox");
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MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
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MODULE_LICENSE("GPL");
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