mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
481 lines
14 KiB
C
481 lines
14 KiB
C
/*
|
|
* Copyright (C) 1998-1999 Andrzej Krzysztofowicz, Author and Maintainer
|
|
* Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
|
|
* Copyright (C) 2003 Red Hat
|
|
* Copyright (C) 2006-2007 MontaVista Software, Inc. <source@mvista.com>
|
|
*
|
|
* May be copied or modified under the terms of the GNU General Public License
|
|
*
|
|
* Documentation:
|
|
*
|
|
* Publically available from Intel web site. Errata documentation
|
|
* is also publically available. As an aide to anyone hacking on this
|
|
* driver the list of errata that are relevant is below.going back to
|
|
* PIIX4. Older device documentation is now a bit tricky to find.
|
|
*
|
|
* Errata of note:
|
|
*
|
|
* Unfixable
|
|
* PIIX4 errata #9 - Only on ultra obscure hw
|
|
* ICH3 errata #13 - Not observed to affect real hw
|
|
* by Intel
|
|
*
|
|
* Things we must deal with
|
|
* PIIX4 errata #10 - BM IDE hang with non UDMA
|
|
* (must stop/start dma to recover)
|
|
* 440MX errata #15 - As PIIX4 errata #10
|
|
* PIIX4 errata #15 - Must not read control registers
|
|
* during a PIO transfer
|
|
* 440MX errata #13 - As PIIX4 errata #15
|
|
* ICH2 errata #21 - DMA mode 0 doesn't work right
|
|
* ICH0/1 errata #55 - As ICH2 errata #21
|
|
* ICH2 spec c #9 - Extra operations needed to handle
|
|
* drive hotswap [NOT YET SUPPORTED]
|
|
* ICH2 spec c #20 - IDE PRD must not cross a 64K boundary
|
|
* and must be dword aligned
|
|
* ICH2 spec c #24 - UDMA mode 4,5 t85/86 should be 6ns not 3.3
|
|
*
|
|
* Should have been BIOS fixed:
|
|
* 450NX: errata #19 - DMA hangs on old 450NX
|
|
* 450NX: errata #20 - DMA hangs on old 450NX
|
|
* 450NX: errata #25 - Corruption with DMA on old 450NX
|
|
* ICH3 errata #15 - IDE deadlock under high load
|
|
* (BIOS must set dev 31 fn 0 bit 23)
|
|
* ICH3 errata #18 - Don't use native mode
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/ide.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/io.h>
|
|
|
|
#define DRV_NAME "piix"
|
|
|
|
static int no_piix_dma;
|
|
|
|
/**
|
|
* piix_set_pio_mode - set host controller for PIO mode
|
|
* @drive: drive
|
|
* @pio: PIO mode number
|
|
*
|
|
* Set the interface PIO mode based upon the settings done by AMI BIOS.
|
|
*/
|
|
|
|
static void piix_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 = hwif->channel ? 0x42 : 0x40;
|
|
int slave_port = 0x44;
|
|
unsigned long flags;
|
|
u16 master_data;
|
|
u8 slave_data;
|
|
static DEFINE_SPINLOCK(tune_lock);
|
|
int control = 0;
|
|
|
|
/* ISP RTC */
|
|
static const u8 timings[][2]= {
|
|
{ 0, 0 },
|
|
{ 0, 0 },
|
|
{ 1, 0 },
|
|
{ 2, 1 },
|
|
{ 2, 3 }, };
|
|
|
|
/*
|
|
* Master vs slave is synchronized above us but the slave register is
|
|
* shared by the two hwifs so the corner case of two slave timeouts in
|
|
* parallel must be locked.
|
|
*/
|
|
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; /* Prefetch, post write */
|
|
if (pio > 2)
|
|
control |= 2; /* IORDY */
|
|
if (is_slave) {
|
|
master_data |= 0x4000;
|
|
master_data &= ~0x0070;
|
|
if (pio > 1) {
|
|
/* Set PPE, IE and TIME */
|
|
master_data |= control << 4;
|
|
}
|
|
pci_read_config_byte(dev, slave_port, &slave_data);
|
|
slave_data &= hwif->channel ? 0x0f : 0xf0;
|
|
slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) <<
|
|
(hwif->channel ? 4 : 0);
|
|
} else {
|
|
master_data &= ~0x3307;
|
|
if (pio > 1) {
|
|
/* enable PPE, IE and TIME */
|
|
master_data |= control;
|
|
}
|
|
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);
|
|
}
|
|
|
|
/**
|
|
* piix_set_dma_mode - set host controller for DMA mode
|
|
* @drive: drive
|
|
* @speed: DMA mode
|
|
*
|
|
* Set a PIIX host controller to the desired DMA mode. This involves
|
|
* programming the right timing data into the PCI configuration space.
|
|
*/
|
|
|
|
static void piix_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 = hwif->channel ? 0x42 : 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;
|
|
int sitre;
|
|
u16 reg4042, reg4a;
|
|
u8 reg48, reg54, reg55;
|
|
|
|
pci_read_config_word(dev, maslave, ®4042);
|
|
sitre = (reg4042 & 0x4000) ? 1 : 0;
|
|
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 */
|
|
|
|
piix_set_pio_mode(drive, pio);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* init_chipset_ich - set up the ICH chipset
|
|
* @dev: PCI device to set up
|
|
*
|
|
* Initialize the PCI device as required. For the ICH this turns
|
|
* out to be nice and simple.
|
|
*/
|
|
|
|
static unsigned int init_chipset_ich(struct pci_dev *dev)
|
|
{
|
|
u32 extra = 0;
|
|
|
|
pci_read_config_dword(dev, 0x54, &extra);
|
|
pci_write_config_dword(dev, 0x54, extra | 0x400);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ich_clear_irq - clear BMDMA status
|
|
* @drive: IDE drive
|
|
*
|
|
* ICHx contollers set DMA INTR no matter DMA or PIO.
|
|
* BMDMA status might need to be cleared even for
|
|
* PIO interrupts to prevent spurious/lost IRQ.
|
|
*/
|
|
static void ich_clear_irq(ide_drive_t *drive)
|
|
{
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
u8 dma_stat;
|
|
|
|
/*
|
|
* ide_dma_end() needs BMDMA status for error checking.
|
|
* So, skip clearing BMDMA status here and leave it
|
|
* to ide_dma_end() if this is DMA interrupt.
|
|
*/
|
|
if (drive->waiting_for_dma || hwif->dma_base == 0)
|
|
return;
|
|
|
|
/* clear the INTR & ERROR bits */
|
|
dma_stat = inb(hwif->dma_base + ATA_DMA_STATUS);
|
|
/* Should we force the bit as well ? */
|
|
outb(dma_stat, hwif->dma_base + ATA_DMA_STATUS);
|
|
}
|
|
|
|
struct ich_laptop {
|
|
u16 device;
|
|
u16 subvendor;
|
|
u16 subdevice;
|
|
};
|
|
|
|
/*
|
|
* List of laptops that use short cables rather than 80 wire
|
|
*/
|
|
|
|
static const struct ich_laptop ich_laptop[] = {
|
|
/* devid, subvendor, subdev */
|
|
{ 0x27DF, 0x1025, 0x0102 }, /* ICH7 on Acer 5602aWLMi */
|
|
{ 0x27DF, 0x0005, 0x0280 }, /* ICH7 on Acer 5602WLMi */
|
|
{ 0x27DF, 0x1025, 0x0110 }, /* ICH7 on Acer 3682WLMi */
|
|
{ 0x27DF, 0x1043, 0x1267 }, /* ICH7 on Asus W5F */
|
|
{ 0x27DF, 0x103C, 0x30A1 }, /* ICH7 on HP Compaq nc2400 */
|
|
{ 0x27DF, 0x1071, 0xD221 }, /* ICH7 on Hercules EC-900 */
|
|
{ 0x24CA, 0x1025, 0x0061 }, /* ICH4 on Acer Aspire 2023WLMi */
|
|
{ 0x2653, 0x1043, 0x82D8 }, /* ICH6M on Asus Eee 701 */
|
|
/* end marker */
|
|
{ 0, }
|
|
};
|
|
|
|
static u8 piix_cable_detect(ide_hwif_t *hwif)
|
|
{
|
|
struct pci_dev *pdev = to_pci_dev(hwif->dev);
|
|
const struct ich_laptop *lap = &ich_laptop[0];
|
|
u8 reg54h = 0, mask = hwif->channel ? 0xc0 : 0x30;
|
|
|
|
/* check for specials */
|
|
while (lap->device) {
|
|
if (lap->device == pdev->device &&
|
|
lap->subvendor == pdev->subsystem_vendor &&
|
|
lap->subdevice == pdev->subsystem_device) {
|
|
return ATA_CBL_PATA40_SHORT;
|
|
}
|
|
lap++;
|
|
}
|
|
|
|
pci_read_config_byte(pdev, 0x54, ®54h);
|
|
|
|
return (reg54h & mask) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
|
|
}
|
|
|
|
/**
|
|
* init_hwif_piix - fill in the hwif for the PIIX
|
|
* @hwif: IDE interface
|
|
*
|
|
* Set up the ide_hwif_t for the PIIX interface according to the
|
|
* capabilities of the hardware.
|
|
*/
|
|
|
|
static void __devinit init_hwif_piix(ide_hwif_t *hwif)
|
|
{
|
|
if (!hwif->dma_base)
|
|
return;
|
|
|
|
if (no_piix_dma)
|
|
hwif->ultra_mask = hwif->mwdma_mask = hwif->swdma_mask = 0;
|
|
}
|
|
|
|
static const struct ide_port_ops piix_port_ops = {
|
|
.set_pio_mode = piix_set_pio_mode,
|
|
.set_dma_mode = piix_set_dma_mode,
|
|
.cable_detect = piix_cable_detect,
|
|
};
|
|
|
|
static const struct ide_port_ops ich_port_ops = {
|
|
.set_pio_mode = piix_set_pio_mode,
|
|
.set_dma_mode = piix_set_dma_mode,
|
|
.clear_irq = ich_clear_irq,
|
|
.cable_detect = piix_cable_detect,
|
|
};
|
|
|
|
#ifndef CONFIG_IA64
|
|
#define IDE_HFLAGS_PIIX IDE_HFLAG_LEGACY_IRQS
|
|
#else
|
|
#define IDE_HFLAGS_PIIX 0
|
|
#endif
|
|
|
|
#define DECLARE_PIIX_DEV(udma) \
|
|
{ \
|
|
.name = DRV_NAME, \
|
|
.init_hwif = init_hwif_piix, \
|
|
.enablebits = {{0x41,0x80,0x80}, {0x43,0x80,0x80}}, \
|
|
.port_ops = &piix_port_ops, \
|
|
.host_flags = IDE_HFLAGS_PIIX, \
|
|
.pio_mask = ATA_PIO4, \
|
|
.swdma_mask = ATA_SWDMA2_ONLY, \
|
|
.mwdma_mask = ATA_MWDMA12_ONLY, \
|
|
.udma_mask = udma, \
|
|
}
|
|
|
|
#define DECLARE_ICH_DEV(udma) \
|
|
{ \
|
|
.name = DRV_NAME, \
|
|
.init_chipset = init_chipset_ich, \
|
|
.init_hwif = init_hwif_piix, \
|
|
.enablebits = {{0x41,0x80,0x80}, {0x43,0x80,0x80}}, \
|
|
.port_ops = &ich_port_ops, \
|
|
.host_flags = IDE_HFLAGS_PIIX, \
|
|
.pio_mask = ATA_PIO4, \
|
|
.swdma_mask = ATA_SWDMA2_ONLY, \
|
|
.mwdma_mask = ATA_MWDMA12_ONLY, \
|
|
.udma_mask = udma, \
|
|
}
|
|
|
|
static const struct ide_port_info piix_pci_info[] __devinitdata = {
|
|
/* 0: MPIIX */
|
|
{ /*
|
|
* MPIIX actually has only a single IDE channel mapped to
|
|
* the primary or secondary ports depending on the value
|
|
* of the bit 14 of the IDETIM register at offset 0x6c
|
|
*/
|
|
.name = DRV_NAME,
|
|
.enablebits = {{0x6d,0xc0,0x80}, {0x6d,0xc0,0xc0}},
|
|
.host_flags = IDE_HFLAG_ISA_PORTS | IDE_HFLAG_NO_DMA |
|
|
IDE_HFLAGS_PIIX,
|
|
.pio_mask = ATA_PIO4,
|
|
/* This is a painful system best to let it self tune for now */
|
|
},
|
|
/* 1: PIIXa/PIIXb/PIIX3 */
|
|
DECLARE_PIIX_DEV(0x00), /* no udma */
|
|
/* 2: PIIX4 */
|
|
DECLARE_PIIX_DEV(ATA_UDMA2),
|
|
/* 3: ICH0 */
|
|
DECLARE_ICH_DEV(ATA_UDMA2),
|
|
/* 4: ICH */
|
|
DECLARE_ICH_DEV(ATA_UDMA4),
|
|
/* 5: PIIX4 */
|
|
DECLARE_PIIX_DEV(ATA_UDMA4),
|
|
/* 6: ICH[2-7]/ICH[2-3]M/C-ICH/ICH5-SATA/ESB2/ICH8M */
|
|
DECLARE_ICH_DEV(ATA_UDMA5),
|
|
};
|
|
|
|
/**
|
|
* piix_init_one - called when a PIIX is found
|
|
* @dev: the piix 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 piix_init_one(struct pci_dev *dev, const struct pci_device_id *id)
|
|
{
|
|
return ide_pci_init_one(dev, &piix_pci_info[id->driver_data], NULL);
|
|
}
|
|
|
|
/**
|
|
* piix_check_450nx - Check for problem 450NX setup
|
|
*
|
|
* Check for the present of 450NX errata #19 and errata #25. If
|
|
* they are found, disable use of DMA IDE
|
|
*/
|
|
|
|
static void __devinit piix_check_450nx(void)
|
|
{
|
|
struct pci_dev *pdev = NULL;
|
|
u16 cfg;
|
|
while((pdev=pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454NX, pdev))!=NULL)
|
|
{
|
|
/* Look for 450NX PXB. Check for problem configurations
|
|
A PCI quirk checks bit 6 already */
|
|
pci_read_config_word(pdev, 0x41, &cfg);
|
|
/* Only on the original revision: IDE DMA can hang */
|
|
if (pdev->revision == 0x00)
|
|
no_piix_dma = 1;
|
|
/* On all revisions below 5 PXB bus lock must be disabled for IDE */
|
|
else if (cfg & (1<<14) && pdev->revision < 5)
|
|
no_piix_dma = 2;
|
|
}
|
|
if(no_piix_dma)
|
|
printk(KERN_WARNING DRV_NAME ": 450NX errata present, disabling IDE DMA.\n");
|
|
if(no_piix_dma == 2)
|
|
printk(KERN_WARNING DRV_NAME ": A BIOS update may resolve this.\n");
|
|
}
|
|
|
|
static const struct pci_device_id piix_pci_tbl[] = {
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82371FB_0), 1 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82371FB_1), 1 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82371MX), 0 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82371SB_1), 1 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82371AB), 2 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801AB_1), 3 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82443MX_1), 2 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801AA_1), 4 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82372FB_1), 5 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82451NX), 2 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801BA_9), 6 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801BA_8), 6 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801CA_10), 6 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801CA_11), 6 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801DB_11), 6 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801EB_11), 6 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801E_11), 6 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801DB_10), 6 },
|
|
#ifdef CONFIG_BLK_DEV_IDE_SATA
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801EB_1), 6 },
|
|
#endif
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ESB_2), 6 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ICH6_19), 6 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ICH7_21), 6 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801DB_1), 6 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ESB2_18), 6 },
|
|
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ICH8_6), 6 },
|
|
{ 0, },
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, piix_pci_tbl);
|
|
|
|
static struct pci_driver piix_pci_driver = {
|
|
.name = "PIIX_IDE",
|
|
.id_table = piix_pci_tbl,
|
|
.probe = piix_init_one,
|
|
.remove = ide_pci_remove,
|
|
.suspend = ide_pci_suspend,
|
|
.resume = ide_pci_resume,
|
|
};
|
|
|
|
static int __init piix_ide_init(void)
|
|
{
|
|
piix_check_450nx();
|
|
return ide_pci_register_driver(&piix_pci_driver);
|
|
}
|
|
|
|
static void __exit piix_ide_exit(void)
|
|
{
|
|
pci_unregister_driver(&piix_pci_driver);
|
|
}
|
|
|
|
module_init(piix_ide_init);
|
|
module_exit(piix_ide_exit);
|
|
|
|
MODULE_AUTHOR("Andre Hedrick, Andrzej Krzysztofowicz");
|
|
MODULE_DESCRIPTION("PCI driver module for Intel PIIX IDE");
|
|
MODULE_LICENSE("GPL");
|