/*
* linux/drivers/ide/pci/slc90e66.c Version 0.11 September 11, 2002
*
* Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
*
* This a look-a-like variation of the ICH0 PIIX4 Ultra-66,
* but this keeps the ISA-Bridge and slots alive.
*
*/
#include <linux/config.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <asm/io.h>
static u8 slc90e66_ratemask (ide_drive_t *drive)
{
u8 mode = 2;
if (!eighty_ninty_three(drive))
mode = min(mode, (u8)1);
return mode;
}
static u8 slc90e66_dma_2_pio (u8 xfer_rate) {
switch(xfer_rate) {
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;
}
}
/*
* Based on settings done by AMI BIOS
* (might be useful if drive is not registered in CMOS for any reason).
*/
static void slc90e66_tune_drive (ide_drive_t *drive, u8 pio)
{
ide_hwif_t *hwif = HWIF(drive);
struct pci_dev *dev = hwif->pci_dev;
int is_slave = (&hwif->drives[1] == drive);
int master_port = hwif->channel ? 0x42 : 0x40;
int slave_port = 0x44;
unsigned long flags;
u16 master_data;
u8 slave_data;
/* ISP RTC */
u8 timings[][2] = { { 0, 0 },
{ 0, 0 },
{ 1, 0 },
{ 2, 1 },
{ 2, 3 }, };
pio = ide_get_best_pio_mode(drive, pio, 5, NULL);
spin_lock_irqsave(&ide_lock, flags);
pci_read_config_word(dev, master_port, &master_data);
if (is_slave) {
master_data = master_data | 0x4000;
if (pio > 1)
/* enable PPE, IE and TIME */
master_data = master_data | 0x0070;
pci_read_config_byte(dev, slave_port, &slave_data);
slave_data = slave_data & (hwif->channel ? 0x0f : 0xf0);
slave_data = slave_data | (((timings[pio][0] << 2) | timings[pio][1]) << (hwif->channel ? 4 : 0));
} else {
master_data = master_data & 0xccf8;
if (pio > 1)
/* enable PPE, IE and TIME */
master_data = master_data | 0x0007;
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(&ide_lock, flags);
}
static int slc90e66_tune_chipset (ide_drive_t *drive, u8 xferspeed)
{
ide_hwif_t *hwif = HWIF(drive);
struct pci_dev *dev = hwif->pci_dev;
u8 maslave = hwif->channel ? 0x42 : 0x40;
u8 speed = ide_rate_filter(slc90e66_ratemask(drive), xferspeed);
int sitre = 0, a_speed = 7 << (drive->dn * 4);
int u_speed = 0, u_flag = 1 << drive->dn;
u16 reg4042, reg44, reg48, reg4a;
pci_read_config_word(dev, maslave, ®4042);
sitre = (reg4042 & 0x4000) ? 1 : 0;
pci_read_config_word(dev, 0x44, ®44);
pci_read_config_word(dev, 0x48, ®48);
pci_read_config_word(dev, 0x4a, ®4a);
switch(speed) {
#ifdef CONFIG_BLK_DEV_IDEDMA
case XFER_UDMA_4: u_speed = 4 << (drive->dn * 4); break;
case XFER_UDMA_3: u_speed = 3 << (drive->dn * 4); break;
case XFER_UDMA_2: u_speed = 2 << (drive->dn * 4); break;
case XFER_UDMA_1: u_speed = 1 << (drive->dn * 4); break;
case XFER_UDMA_0: u_speed = 0 << (drive->dn * 4); break;
case XFER_MW_DMA_2:
case XFER_MW_DMA_1:
case XFER_SW_DMA_2: break;
#endif /* CONFIG_BLK_DEV_IDEDMA */
case XFER_PIO_4:
case XFER_PIO_3:
case XFER_PIO_2:
case XFER_PIO_0: break;
default: return -1;
}
if (speed >= XFER_UDMA_0) {
if (!(reg48 & u_flag))
pci_write_config_word(dev, 0x48, reg48|u_flag);
/* FIXME: (reg4a & a_speed) ? */
if ((reg4a & u_speed) != u_speed) {
pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
pci_read_config_word(dev, 0x4a, ®4a);
pci_write_config_word(dev, 0x4a, reg4a|u_speed);
}
} else {
if (reg48 & u_flag)
pci_write_config_word(dev, 0x48, reg48 & ~u_flag);
if (reg4a & a_speed)
pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
}
slc90e66_tune_drive(drive, slc90e66_dma_2_pio(speed));
return (ide_config_drive_speed(drive, speed));
}
#ifdef CONFIG_BLK_DEV_IDEDMA
static int slc90e66_config_drive_for_dma (ide_drive_t *drive)
{
u8 speed = ide_dma_speed(drive, slc90e66_ratemask(drive));
if (!(speed)) {
u8 tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL);
speed = slc90e66_dma_2_pio(XFER_PIO_0 + tspeed);
}
(void) slc90e66_tune_chipset(drive, speed);
return ide_dma_enable(drive);
}
static int slc90e66_config_drive_xfer_rate (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
struct hd_driveid *id = drive->id;
drive->init_speed = 0;
if (id && (id->capability & 1) && drive->autodma) {
if (ide_use_dma(drive)) {
if (slc90e66_config_drive_for_dma(drive))
return hwif->ide_dma_on(drive);
}
goto fast_ata_pio;
} else if ((id->capability & 8) || (id->field_valid & 2)) {
fast_ata_pio:
hwif->tuneproc(drive, 5);
return hwif->ide_dma_off_quietly(drive);
}
/* IORDY not supported */
return 0;
}
#endif /* CONFIG_BLK_DEV_IDEDMA */
static void __devinit init_hwif_slc90e66 (ide_hwif_t *hwif)
{
u8 reg47 = 0;
u8 mask = hwif->channel ? 0x01 : 0x02; /* bit0:Primary */
hwif->autodma = 0;
if (!hwif->irq)
hwif->irq = hwif->channel ? 15 : 14;
hwif->speedproc = &slc90e66_tune_chipset;
hwif->tuneproc = &slc90e66_tune_drive;
pci_read_config_byte(hwif->pci_dev, 0x47, ®47);
if (!hwif->dma_base) {
hwif->drives[0].autotune = 1;
hwif->drives[1].autotune = 1;
return;
}
hwif->atapi_dma = 1;
hwif->ultra_mask = 0x1f;
hwif->mwdma_mask = 0x07;
hwif->swdma_mask = 0x07;
#ifdef CONFIG_BLK_DEV_IDEDMA
if (!(hwif->udma_four))
/* bit[0(1)]: 0:80, 1:40 */
hwif->udma_four = (reg47 & mask) ? 0 : 1;
hwif->ide_dma_check = &slc90e66_config_drive_xfer_rate;
if (!noautodma)
hwif->autodma = 1;
hwif->drives[0].autodma = hwif->autodma;
hwif->drives[1].autodma = hwif->autodma;
#endif /* !CONFIG_BLK_DEV_IDEDMA */
}
static ide_pci_device_t slc90e66_chipset __devinitdata = {
.name = "SLC90E66",
.init_hwif = init_hwif_slc90e66,
.channels = 2,
.autodma = AUTODMA,
.enablebits = {{0x41,0x80,0x80}, {0x43,0x80,0x80}},
.bootable = ON_BOARD,
};
static int __devinit slc90e66_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
return ide_setup_pci_device(dev, &slc90e66_chipset);
}
static struct pci_device_id slc90e66_pci_tbl[] = {
{ PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
{ 0, },
};
MODULE_DEVICE_TABLE(pci, slc90e66_pci_tbl);
static struct pci_driver driver = {
.name = "SLC90e66_IDE",
.id_table = slc90e66_pci_tbl,
.probe = slc90e66_init_one,
};
static int slc90e66_ide_init(void)
{
return ide_pci_register_driver(&driver);
}
module_init(slc90e66_ide_init);
MODULE_AUTHOR("Andre Hedrick");
MODULE_DESCRIPTION("PCI driver module for SLC90E66 IDE");
MODULE_LICENSE("GPL");
