mirror of
https://github.com/torvalds/linux.git
synced 2024-11-02 10:11:36 +00:00
ide: add it8213 IDE driver
From: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Jack Lee
Bartlomiej Zolnierkiewicz
parent
a534b68da0
commit
9c6712c0bc
@ -606,6 +606,11 @@ config BLK_DEV_PIIX
|
||||
the kernel to change PIO, DMA and UDMA speeds and to configure
|
||||
the chip to optimum performance.
|
||||
|
||||
config BLK_DEV_IT8213
|
||||
tristate "IT8213 IDE support"
|
||||
help
|
||||
This driver adds support for the ITE 8213 IDE controller.
|
||||
|
||||
config BLK_DEV_IT821X
|
||||
tristate "IT821X IDE support"
|
||||
help
|
||||
|
||||
@ -11,7 +11,7 @@ obj-$(CONFIG_BLK_DEV_SC1200) += sc1200.o
|
||||
obj-$(CONFIG_BLK_DEV_CY82C693) += cy82c693.o
|
||||
obj-$(CONFIG_BLK_DEV_HPT34X) += hpt34x.o
|
||||
obj-$(CONFIG_BLK_DEV_HPT366) += hpt366.o
|
||||
#obj-$(CONFIG_BLK_DEV_HPT37X) += hpt37x.o
|
||||
obj-$(CONFIG_BLK_DEV_IT8213) += it8213.o
|
||||
obj-$(CONFIG_BLK_DEV_IT821X) += it821x.o
|
||||
obj-$(CONFIG_BLK_DEV_JMICRON) += jmicron.o
|
||||
obj-$(CONFIG_BLK_DEV_NS87415) += ns87415.o
|
||||
|
||||
402
drivers/ide/pci/it8213.c
Normal file
402
drivers/ide/pci/it8213.c
Normal file
@ -0,0 +1,402 @@
|
||||
#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 ATA100 clipped by drive cable setup.
|
||||
*/
|
||||
|
||||
static u8 it8213_ratemask (ide_drive_t *drive)
|
||||
{
|
||||
u8 mode = 4;
|
||||
if (!eighty_ninty_three(drive))
|
||||
mode = min(mode, (u8)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;
|
||||
}
|
||||
}
|
||||
|
||||
static spinlock_t tune_lock = SPIN_LOCK_UNLOCKED;
|
||||
|
||||
/*
|
||||
* it8213_tuneproc - tune a drive
|
||||
* @drive: drive to tune
|
||||
* @mode_wanted: the target operating mode
|
||||
*
|
||||
* Load the timing settings for this device mode into the
|
||||
* controller. By the time we are called the mode has been
|
||||
* modified as neccessary to handle the absence of seperate
|
||||
* master/slave timers for MWDMA/PIO.
|
||||
*
|
||||
* This code is only used in pass through 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 = (&hwif->drives[1] == drive);
|
||||
int master_port = 0x40;
|
||||
int slave_port = 0x44;
|
||||
unsigned long flags;
|
||||
u16 master_data;
|
||||
u8 slave_data;
|
||||
|
||||
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(&tune_lock, flags);
|
||||
pci_read_config_word(dev, master_port, &master_data);
|
||||
if (is_slave) {
|
||||
master_data = master_data | 0x4000;
|
||||
if (pio > 1)
|
||||
|
||||
master_data = master_data | 0x0070;
|
||||
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]) << 0));
|
||||
} else {
|
||||
master_data = master_data & 0xccf8;
|
||||
if (pio > 1)
|
||||
|
||||
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(&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, byte 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_MW_DMA_0:
|
||||
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(speed >= XFER_UDMA_0)*/
|
||||
{
|
||||
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)
|
||||
{
|
||||
u8 tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL);
|
||||
speed = it8213_dma_2_pio(XFER_PIO_0 + tspeed);
|
||||
}
|
||||
// config_it8213_chipset_for_pio(drive, !speed);
|
||||
it8213_tune_chipset(drive, speed);
|
||||
return ide_dma_enable(drive);
|
||||
}
|
||||
|
||||
/**
|
||||
* config_it8213_chipset_for_pio - set drive timings
|
||||
* @drive: drive to tune
|
||||
* @speed we want
|
||||
*
|
||||
* Compute the best pio mode we can for a given device. We must
|
||||
* pick a speed that does not cause problems with the other device
|
||||
* on the cable.
|
||||
*/
|
||||
/*
|
||||
static void config_it8213_chipset_for_pio (ide_drive_t *drive, byte set_speed)
|
||||
{
|
||||
ide_hwif_t *hwif = HWIF(drive);
|
||||
// u8 unit = drive->select.b.unit;
|
||||
ide_hwif_t *hwif = drive->hwif;
|
||||
ide_drive_t *pair = &hwif->drives[1-unit];
|
||||
u8 speed = 0, set_pio = ide_get_best_pio_mode(drive, 255, 5, NULL);
|
||||
u8 pair_pio;
|
||||
|
||||
if(pair != NULL) {
|
||||
pair_pio = ide_get_best_pio_mode(pair, 255, 5, NULL);
|
||||
if(pair_pio < set_pio)
|
||||
set_pio = pair_pio;
|
||||
}
|
||||
it8213_tuneproc(drive, set_pio);
|
||||
speed = XFER_PIO_0 + set_pio;
|
||||
if (set_speed)
|
||||
(void) ide_config_drive_speed(drive, speed);
|
||||
}
|
||||
*/
|
||||
/**
|
||||
* 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;
|
||||
// struct hd_driveid *id = drive->id;
|
||||
ide_hwif_t *hwif = HWIF(drive);
|
||||
if (ide_use_dma(drive)) {
|
||||
if (config_chipset_for_dma(drive))
|
||||
return hwif->ide_dma_on(drive);
|
||||
}
|
||||
// config_it8213_chipset_for_pio(drive, 1);
|
||||
hwif->tuneproc(drive, 255);
|
||||
return hwif->ide_dma_off_quietly(drive);
|
||||
}
|
||||
|
||||
|
||||
static unsigned int __devinit init_chipset_it8213(struct pci_dev *dev, const char *name)
|
||||
{
|
||||
printk(KERN_INFO "it8213: controller in IDE mode.\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* 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;
|
||||
u8 mask = 0x02;
|
||||
|
||||
hwif->atapi_dma = 1;
|
||||
|
||||
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)
|
||||
goto fallback;
|
||||
hwif->atapi_dma = 1;
|
||||
hwif->ultra_mask = 0x7f;
|
||||
hwif->mwdma_mask = 0x07;
|
||||
hwif->swdma_mask = 0x07;
|
||||
|
||||
pci_read_config_byte(hwif->pci_dev, 0x42, ®42h);
|
||||
ata66 = (reg42h & mask) ? 0 : 1;
|
||||
|
||||
hwif->ide_dma_check = &it8213_config_drive_for_dma;
|
||||
if (!(hwif->udma_four))
|
||||
hwif->udma_four = ata66;
|
||||
// hwif->udma_four = 0;
|
||||
|
||||
/*
|
||||
* 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;
|
||||
return;
|
||||
fallback:
|
||||
hwif->autodma = 0;
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
#define DECLARE_ITE_DEV(name_str) \
|
||||
{ \
|
||||
.name = name_str, \
|
||||
.init_chipset = init_chipset_it8213, \
|
||||
.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, PCI_DEVICE_ID_ITE_8213, 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 and Alan Cox"); /* Update this */
|
||||
MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue
Block a user