6788182602
* set ATAPI/IORDY/TIME bits correctly in it8213_tuneproc() * fix UDMA/MWDMA/SWDMA masks in it8213_init_hwif() * in it8213_tune_chipset() SWDMA2 mode should be used instead of MWDMA0 * backport various fixes from piix/slc90e66 drivers: - in it8213_tuneproc() the highest possible PIO mode is PIO4 (not PIO5) - clear ATAPI/IORDY/TIME bits before setting them also for slave device - use ->speedproc in it8213_config_drive_for_dma() - don't try to tune PIO in config_chipset_for_pio() - simplify is_slave calculation in it8213_tuneproc() - misc cleanups * fix it8213_ratemask() and it8213_tuneproc() comments * simplify it8213_init_hwif() * remove init_chipset_it8213() * add missing Copyrights and update MODULE_AUTHOR() * CodingStyle cleanups * remove dead code v2: * PCI_DEVICE_ID_ITE_8213 is only defined in -mm kernels, so just use PCI Device ID (0x8213) directly * fix ->ultra_mask incorrectly changed to 0x3f in v1 version of the patch Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
363 lines
8.5 KiB
C
363 lines
8.5 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/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)
|
|
{
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
|
|
if (ide_use_dma(drive)) {
|
|
if (config_chipset_for_dma(drive))
|
|
return hwif->ide_dma_on(drive);
|
|
}
|
|
|
|
hwif->speedproc(drive, XFER_PIO_0
|
|
+ ide_get_best_pio_mode(drive, 255, 4, NULL));
|
|
|
|
return hwif->ide_dma_off_quietly(drive);
|
|
}
|
|
|
|
/**
|
|
* 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");
|