217 lines
5.5 KiB
C
217 lines
5.5 KiB
C
/*
|
|
* 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
|
|
* @drive: drive
|
|
* @pio: PIO mode number
|
|
*
|
|
* Set the interface PIO mode.
|
|
*/
|
|
|
|
static void it8213_set_pio_mode(ide_drive_t *drive, const u8 pio)
|
|
{
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
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;
|
|
|
|
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 (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_set_dma_mode - set host controller for DMA mode
|
|
* @drive: drive
|
|
* @speed: DMA mode
|
|
*
|
|
* Tune the ITE chipset for the DMA mode.
|
|
*/
|
|
|
|
static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed)
|
|
{
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
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;
|
|
|
|
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 };
|
|
u8 pio;
|
|
|
|
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)
|
|
pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
|
|
else
|
|
pio = 2; /* only SWDMA2 is allowed */
|
|
|
|
it8213_set_pio_mode(drive, pio);
|
|
}
|
|
}
|
|
|
|
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 __devinitdata = {
|
|
.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 __devinit 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");
|