| /* |
| * linux/drivers/ide/pci/piix.c Version 0.54 Sep 5, 2007 |
| * |
| * Copyright (C) 1998-1999 Andrzej Krzysztofowicz, Author and Maintainer |
| * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org> |
| * Copyright (C) 2003 Red Hat Inc <alan@redhat.com> |
| * Copyright (C) 2006-2007 MontaVista Software, Inc. <source@mvista.com> |
| * |
| * May be copied or modified under the terms of the GNU General Public License |
| * |
| * PIO mode setting function for Intel chipsets. |
| * For use instead of BIOS settings. |
| * |
| * 40-41 |
| * 42-43 |
| * |
| * 41 |
| * 43 |
| * |
| * | PIO 0 | c0 | 80 | 0 | |
| * | PIO 2 | SW2 | d0 | 90 | 4 | |
| * | PIO 3 | MW1 | e1 | a1 | 9 | |
| * | PIO 4 | MW2 | e3 | a3 | b | |
| * |
| * sitre = word40 & 0x4000; primary |
| * sitre = word42 & 0x4000; secondary |
| * |
| * 44 8421|8421 hdd|hdb |
| * |
| * 48 8421 hdd|hdc|hdb|hda udma enabled |
| * |
| * 0001 hda |
| * 0010 hdb |
| * 0100 hdc |
| * 1000 hdd |
| * |
| * 4a 84|21 hdb|hda |
| * 4b 84|21 hdd|hdc |
| * |
| * ata-33/82371AB |
| * ata-33/82371EB |
| * ata-33/82801AB ata-66/82801AA |
| * 00|00 udma 0 00|00 reserved |
| * 01|01 udma 1 01|01 udma 3 |
| * 10|10 udma 2 10|10 udma 4 |
| * 11|11 reserved 11|11 reserved |
| * |
| * 54 8421|8421 ata66 drive|ata66 enable |
| * |
| * pci_read_config_word(HWIF(drive)->pci_dev, 0x40, ®40); |
| * pci_read_config_word(HWIF(drive)->pci_dev, 0x42, ®42); |
| * pci_read_config_word(HWIF(drive)->pci_dev, 0x44, ®44); |
| * pci_read_config_byte(HWIF(drive)->pci_dev, 0x48, ®48); |
| * pci_read_config_word(HWIF(drive)->pci_dev, 0x4a, ®4a); |
| * pci_read_config_byte(HWIF(drive)->pci_dev, 0x54, ®54); |
| * |
| * 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/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 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 = HWIF(drive); |
| struct pci_dev *dev = hwif->pci_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 = HWIF(drive); |
| struct pci_dev *dev = hwif->pci_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 |
| * @name: Name of the device |
| * |
| * Initialize the PCI device as required. For the ICH this turns |
| * out to be nice and simple. |
| */ |
| |
| static unsigned int __devinit init_chipset_ich(struct pci_dev *dev, const char *name) |
| { |
| u32 extra = 0; |
| |
| pci_read_config_dword(dev, 0x54, &extra); |
| pci_write_config_dword(dev, 0x54, extra | 0x400); |
| |
| return 0; |
| } |
| |
| /** |
| * piix_dma_clear_irq - clear BMDMA status |
| * @drive: IDE drive to clear |
| * |
| * Called from ide_intr() for PIO interrupts |
| * to clear BMDMA status as needed by ICHx |
| */ |
| static void piix_dma_clear_irq(ide_drive_t *drive) |
| { |
| ide_hwif_t *hwif = HWIF(drive); |
| u8 dma_stat; |
| |
| /* clear the INTR & ERROR bits */ |
| dma_stat = inb(hwif->dma_status); |
| /* Should we force the bit as well ? */ |
| outb(dma_stat, hwif->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 */ |
| { 0x24CA, 0x1025, 0x0061 }, /* ICH4 on Acer Aspire 2023WLMi */ |
| /* end marker */ |
| { 0, } |
| }; |
| |
| static u8 __devinit piix_cable_detect(ide_hwif_t *hwif) |
| { |
| struct pci_dev *pdev = hwif->pci_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) |
| { |
| hwif->set_pio_mode = &piix_set_pio_mode; |
| hwif->set_dma_mode = &piix_set_dma_mode; |
| |
| if (!hwif->dma_base) |
| return; |
| |
| if (hwif->ultra_mask & 0x78) { |
| if (hwif->cbl != ATA_CBL_PATA40_SHORT) |
| hwif->cbl = piix_cable_detect(hwif); |
| } |
| |
| if (no_piix_dma) |
| hwif->ultra_mask = hwif->mwdma_mask = hwif->swdma_mask = 0; |
| } |
| |
| static void __devinit init_hwif_ich(ide_hwif_t *hwif) |
| { |
| init_hwif_piix(hwif); |
| |
| /* ICHx need to clear the BMDMA status for all interrupts */ |
| if (hwif->dma_base) |
| hwif->ide_dma_clear_irq = &piix_dma_clear_irq; |
| } |
| |
| #ifndef CONFIG_IA64 |
| #define IDE_HFLAGS_PIIX (IDE_HFLAG_LEGACY_IRQS | IDE_HFLAG_BOOTABLE) |
| #else |
| #define IDE_HFLAGS_PIIX IDE_HFLAG_BOOTABLE |
| #endif |
| |
| #define DECLARE_PIIX_DEV(name_str, udma) \ |
| { \ |
| .name = name_str, \ |
| .init_hwif = init_hwif_piix, \ |
| .enablebits = {{0x41,0x80,0x80}, {0x43,0x80,0x80}}, \ |
| .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(name_str, udma) \ |
| { \ |
| .name = name_str, \ |
| .init_chipset = init_chipset_ich, \ |
| .init_hwif = init_hwif_ich, \ |
| .enablebits = {{0x41,0x80,0x80}, {0x43,0x80,0x80}}, \ |
| .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 */ DECLARE_PIIX_DEV("PIIXa", 0x00), /* no udma */ |
| /* 1 */ DECLARE_PIIX_DEV("PIIXb", 0x00), /* no udma */ |
| |
| /* 2 */ |
| { /* |
| * 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 = "MPIIX", |
| .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 */ |
| }, |
| |
| /* 3 */ DECLARE_PIIX_DEV("PIIX3", 0x00), /* no udma */ |
| /* 4 */ DECLARE_PIIX_DEV("PIIX4", ATA_UDMA2), |
| /* 5 */ DECLARE_ICH_DEV("ICH0", ATA_UDMA2), |
| /* 6 */ DECLARE_PIIX_DEV("PIIX4", ATA_UDMA2), |
| /* 7 */ DECLARE_ICH_DEV("ICH", ATA_UDMA4), |
| /* 8 */ DECLARE_PIIX_DEV("PIIX4", ATA_UDMA4), |
| /* 9 */ DECLARE_PIIX_DEV("PIIX4", ATA_UDMA2), |
| /* 10 */ DECLARE_ICH_DEV("ICH2", ATA_UDMA5), |
| /* 11 */ DECLARE_ICH_DEV("ICH2M", ATA_UDMA5), |
| /* 12 */ DECLARE_ICH_DEV("ICH3M", ATA_UDMA5), |
| /* 13 */ DECLARE_ICH_DEV("ICH3", ATA_UDMA5), |
| /* 14 */ DECLARE_ICH_DEV("ICH4", ATA_UDMA5), |
| /* 15 */ DECLARE_ICH_DEV("ICH5", ATA_UDMA5), |
| /* 16 */ DECLARE_ICH_DEV("C-ICH", ATA_UDMA5), |
| /* 17 */ DECLARE_ICH_DEV("ICH4", ATA_UDMA5), |
| /* 18 */ DECLARE_ICH_DEV("ICH5-SATA", ATA_UDMA5), |
| /* 19 */ DECLARE_ICH_DEV("ICH5", ATA_UDMA5), |
| /* 20 */ DECLARE_ICH_DEV("ICH6", ATA_UDMA5), |
| /* 21 */ DECLARE_ICH_DEV("ICH7", ATA_UDMA5), |
| /* 22 */ DECLARE_ICH_DEV("ICH4", ATA_UDMA5), |
| /* 23 */ DECLARE_ICH_DEV("ESB2", ATA_UDMA5), |
| /* 24 */ DECLARE_ICH_DEV("ICH8M", 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_setup_pci_device(dev, &piix_pci_info[id->driver_data]); |
| } |
| |
| /** |
| * 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 "piix: 450NX errata present, disabling IDE DMA.\n"); |
| if(no_piix_dma == 2) |
| printk(KERN_WARNING "piix: 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), 0 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82371FB_1), 1 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82371MX), 2 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82371SB_1), 3 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82371AB), 4 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801AB_1), 5 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82443MX_1), 6 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801AA_1), 7 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82372FB_1), 8 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82451NX), 9 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801BA_9), 10 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801BA_8), 11 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801CA_10), 12 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801CA_11), 13 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801DB_11), 14 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801EB_11), 15 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801E_11), 16 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801DB_10), 17 }, |
| #ifdef CONFIG_BLK_DEV_IDE_SATA |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801EB_1), 18 }, |
| #endif |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ESB_2), 19 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ICH6_19), 20 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ICH7_21), 21 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801DB_1), 22 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ESB2_18), 23 }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ICH8_6), 24 }, |
| { 0, }, |
| }; |
| MODULE_DEVICE_TABLE(pci, piix_pci_tbl); |
| |
| static struct pci_driver driver = { |
| .name = "PIIX_IDE", |
| .id_table = piix_pci_tbl, |
| .probe = piix_init_one, |
| }; |
| |
| static int __init piix_ide_init(void) |
| { |
| piix_check_450nx(); |
| return ide_pci_register_driver(&driver); |
| } |
| |
| module_init(piix_ide_init); |
| |
| MODULE_AUTHOR("Andre Hedrick, Andrzej Krzysztofowicz"); |
| MODULE_DESCRIPTION("PCI driver module for Intel PIIX IDE"); |
| MODULE_LICENSE("GPL"); |