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android_kernel_motorola_sm6225/drivers/ide/pci/atiixp.c
Bartlomiej Zolnierkiewicz 9ff6f72f43 ide: remove hwif->autodma and drive->autodma 
* hpt34x.c: disable DMA masks for HPT345
  (hwif->autodma is zero so DMA won't be enabled anyway).

* trm290.c: disable IDE_HFLAG_TRUST_BIOS_FOR_DMA flag
  (hwif->autodma is zero so DMA won't be enabled anyway).

* Check noautodma global variable instead of drive->autodma in ide_tune_dma().

  This fixes handling of "ide=nodma" kernel parameter for icside, ide-cris,
  au1xxx-ide, pmac, it821x, jmicron, sgiioc4 and siimage host drivers.

* Remove hwif->autodma (it was not checked by IDE core code anyway) and
  drive->autodma (was set by all host drivers - except HPT345/TRM290 special
  cases - unless "ide=nodma" was used).

While at it:
- remove needless printk() from icside.c
- remove stale FIXME/comment from ide-probe.c
- don't force DMA off if PCI bus-mastering had to be enabled in setup-pci.c
  (this setting was always later over-ridden by host drivers anyway)

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16 22:29:58 +02:00

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/*
* linux/drivers/ide/pci/atiixp.c Version 0.03 Aug 3 2007
*
* Copyright (C) 2003 ATI Inc. <hyu@ati.com>
* Copyright (C) 2004,2007 Bartlomiej Zolnierkiewicz
*/
#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>
#define ATIIXP_IDE_PIO_TIMING 0x40
#define ATIIXP_IDE_MDMA_TIMING 0x44
#define ATIIXP_IDE_PIO_CONTROL 0x48
#define ATIIXP_IDE_PIO_MODE 0x4a
#define ATIIXP_IDE_UDMA_CONTROL 0x54
#define ATIIXP_IDE_UDMA_MODE 0x56
typedef struct {
u8 command_width;
u8 recover_width;
} atiixp_ide_timing;
static atiixp_ide_timing pio_timing[] = {
{ 0x05, 0x0d },
{ 0x04, 0x07 },
{ 0x03, 0x04 },
{ 0x02, 0x02 },
{ 0x02, 0x00 },
};
static atiixp_ide_timing mdma_timing[] = {
{ 0x07, 0x07 },
{ 0x02, 0x01 },
{ 0x02, 0x00 },
};
static int save_mdma_mode[4];
static DEFINE_SPINLOCK(atiixp_lock);
static void atiixp_dma_host_on(ide_drive_t *drive)
{
struct pci_dev *dev = drive->hwif->pci_dev;
unsigned long flags;
u16 tmp16;
spin_lock_irqsave(&atiixp_lock, flags);
pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
if (save_mdma_mode[drive->dn])
tmp16 &= ~(1 << drive->dn);
else
tmp16 |= (1 << drive->dn);
pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
spin_unlock_irqrestore(&atiixp_lock, flags);
ide_dma_host_on(drive);
}
static void atiixp_dma_host_off(ide_drive_t *drive)
{
struct pci_dev *dev = drive->hwif->pci_dev;
unsigned long flags;
u16 tmp16;
spin_lock_irqsave(&atiixp_lock, flags);
pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
tmp16 &= ~(1 << drive->dn);
pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
spin_unlock_irqrestore(&atiixp_lock, flags);
ide_dma_host_off(drive);
}
/**
* atiixp_set_pio_mode - set host controller for PIO mode
* @drive: drive
* @pio: PIO mode number
*
* Set the interface PIO mode.
*/
static void atiixp_set_pio_mode(ide_drive_t *drive, const u8 pio)
{
struct pci_dev *dev = drive->hwif->pci_dev;
unsigned long flags;
int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
u32 pio_timing_data;
u16 pio_mode_data;
spin_lock_irqsave(&atiixp_lock, flags);
pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
pio_mode_data &= ~(0x07 << (drive->dn * 4));
pio_mode_data |= (pio << (drive->dn * 4));
pci_write_config_word(dev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
pci_read_config_dword(dev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
pio_timing_data &= ~(0xff << timing_shift);
pio_timing_data |= (pio_timing[pio].recover_width << timing_shift) |
(pio_timing[pio].command_width << (timing_shift + 4));
pci_write_config_dword(dev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
spin_unlock_irqrestore(&atiixp_lock, flags);
}
/**
* atiixp_set_dma_mode - set host controller for DMA mode
* @drive: drive
* @speed: DMA mode
*
* Set a ATIIXP host controller to the desired DMA mode. This involves
* programming the right timing data into the PCI configuration space.
*/
static void atiixp_set_dma_mode(ide_drive_t *drive, const u8 speed)
{
struct pci_dev *dev = drive->hwif->pci_dev;
unsigned long flags;
int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
u32 tmp32;
u16 tmp16;
if (speed < XFER_MW_DMA_0)
return;
spin_lock_irqsave(&atiixp_lock, flags);
save_mdma_mode[drive->dn] = 0;
if (speed >= XFER_UDMA_0) {
pci_read_config_word(dev, ATIIXP_IDE_UDMA_MODE, &tmp16);
tmp16 &= ~(0x07 << (drive->dn * 4));
tmp16 |= ((speed & 0x07) << (drive->dn * 4));
pci_write_config_word(dev, ATIIXP_IDE_UDMA_MODE, tmp16);
} else {
if ((speed >= XFER_MW_DMA_0) && (speed <= XFER_MW_DMA_2)) {
save_mdma_mode[drive->dn] = speed;
pci_read_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, &tmp32);
tmp32 &= ~(0xff << timing_shift);
tmp32 |= (mdma_timing[speed & 0x03].recover_width << timing_shift) |
(mdma_timing[speed & 0x03].command_width << (timing_shift + 4));
pci_write_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, tmp32);
}
}
spin_unlock_irqrestore(&atiixp_lock, flags);
}
/**
* init_hwif_atiixp - fill in the hwif for the ATIIXP
* @hwif: IDE interface
*
* Set up the ide_hwif_t for the ATIIXP interface according to the
* capabilities of the hardware.
*/
static void __devinit init_hwif_atiixp(ide_hwif_t *hwif)
{
u8 udma_mode = 0;
u8 ch = hwif->channel;
struct pci_dev *pdev = hwif->pci_dev;
if (!hwif->irq)
hwif->irq = ch ? 15 : 14;
hwif->set_pio_mode = &atiixp_set_pio_mode;
hwif->set_dma_mode = &atiixp_set_dma_mode;
hwif->drives[0].autotune = 1;
hwif->drives[1].autotune = 1;
if (!hwif->dma_base)
return;
hwif->atapi_dma = 1;
hwif->ultra_mask = 0x3f;
hwif->mwdma_mask = 0x07;
pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ch, &udma_mode);
if ((udma_mode & 0x07) >= 0x04 || (udma_mode & 0x70) >= 0x40)
hwif->cbl = ATA_CBL_PATA80;
else
hwif->cbl = ATA_CBL_PATA40;
hwif->dma_host_on = &atiixp_dma_host_on;
hwif->dma_host_off = &atiixp_dma_host_off;
}
static ide_pci_device_t atiixp_pci_info[] __devinitdata = {
{ /* 0 */
.name = "ATIIXP",
.init_hwif = init_hwif_atiixp,
.autodma = AUTODMA,
.enablebits = {{0x48,0x01,0x00}, {0x48,0x08,0x00}},
.bootable = ON_BOARD,
.pio_mask = ATA_PIO4,
},{ /* 1 */
.name = "SB600_PATA",
.init_hwif = init_hwif_atiixp,
.autodma = AUTODMA,
.enablebits = {{0x48,0x01,0x00}, {0x00,0x00,0x00}},
.bootable = ON_BOARD,
.host_flags = IDE_HFLAG_SINGLE,
.pio_mask = ATA_PIO4,
},
};
/**
* atiixp_init_one - called when a ATIIXP is found
* @dev: the atiixp device
* @id: the matching pci id
*
* Called when the PCI registration layer (or the IDE initialization)
* finds a device matching our IDE device tables.
*/
static int __devinit atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
return ide_setup_pci_device(dev, &atiixp_pci_info[id->driver_data]);
}
static const struct pci_device_id atiixp_pci_tbl[] = {
{ PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), 0 },
{ PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), 0 },
{ PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), 0 },
{ PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), 1 },
{ PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP700_IDE), 0 },
{ 0, },
};
MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl);
static struct pci_driver driver = {
.name = "ATIIXP_IDE",
.id_table = atiixp_pci_tbl,
.probe = atiixp_init_one,
};
static int __init atiixp_ide_init(void)
{
return ide_pci_register_driver(&driver);
}
module_init(atiixp_ide_init);
MODULE_AUTHOR("HUI YU");
MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE");
MODULE_LICENSE("GPL");
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