/* * pata_sis.c - SiS ATA driver * * (C) 2005 Red Hat * (C) 2007,2009 Bartlomiej Zolnierkiewicz * * Based upon linux/drivers/ide/pci/sis5513.c * Copyright (C) 1999-2000 Andre Hedrick <andre@linux-ide.org> * Copyright (C) 2002 Lionel Bouton <Lionel.Bouton@inet6.fr>, Maintainer * Copyright (C) 2003 Vojtech Pavlik <vojtech@suse.cz> * SiS Taiwan : for direct support and hardware. * Daniela Engert : for initial ATA100 advices and numerous others. * John Fremlin, Manfred Spraul, Dave Morgan, Peter Kjellerstedt : * for checking code correctness, providing patches. * Original tests and design on the SiS620 chipset. * ATA100 tests and design on the SiS735 chipset. * ATA16/33 support from specs * ATA133 support for SiS961/962 by L.C. Chang <lcchang@sis.com.tw> * * * TODO * Check MWDMA on drives that don't support MWDMA speed pio cycles ? * More Testing */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/blkdev.h> #include <linux/delay.h> #include <linux/device.h> #include <scsi/scsi_host.h> #include <linux/libata.h> #include <linux/ata.h> #include "sis.h" #define DRV_NAME "pata_sis" #define DRV_VERSION "0.5.2" struct sis_chipset { u16 device; /* PCI host ID */ const struct ata_port_info *info; /* Info block */ /* Probably add family, cable detect type etc here to clean up code later */ }; struct sis_laptop { u16 device; u16 subvendor; u16 subdevice; }; static const struct sis_laptop sis_laptop[] = { /* devid, subvendor, subdev */ { 0x5513, 0x1043, 0x1107 }, /* ASUS A6K */ { 0x5513, 0x1734, 0x105F }, /* FSC Amilo A1630 */ { 0x5513, 0x1071, 0x8640 }, /* EasyNote K5305 */ /* end marker */ { 0, } }; static int sis_short_ata40(struct pci_dev *dev) { const struct sis_laptop *lap = &sis_laptop[0]; while (lap->device) { if (lap->device == dev->device && lap->subvendor == dev->subsystem_vendor && lap->subdevice == dev->subsystem_device) return 1; lap++; } return 0; } /** * sis_old_port_base - return PCI configuration base for dev * @adev: device * * Returns the base of the PCI configuration registers for this port * number. */ static int sis_old_port_base(struct ata_device *adev) { return 0x40 + (4 * adev->link->ap->port_no) + (2 * adev->devno); } /** * sis_port_base - return PCI configuration base for dev * @adev: device * * Returns the base of the PCI configuration registers for this port * number. */ static int sis_port_base(struct ata_device *adev) { struct ata_port *ap = adev->link->ap; struct pci_dev *pdev = to_pci_dev(ap->host->dev); int port = 0x40; u32 reg54; /* If bit 30 is set then the registers are mapped at 0x70 not 0x40 */ pci_read_config_dword(pdev, 0x54, ®54); if (reg54 & 0x40000000) port = 0x70; return port + (8 * ap->port_no) + (4 * adev->devno); } /** * sis_133_cable_detect - check for 40/80 pin * @ap: Port * @deadline: deadline jiffies for the operation * * Perform cable detection for the later UDMA133 capable * SiS chipset. */ static int sis_133_cable_detect(struct ata_port *ap) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); u16 tmp; /* The top bit of this register is the cable detect bit */ pci_read_config_word(pdev, 0x50 + 2 * ap->port_no, &tmp); if ((tmp & 0x8000) && !sis_short_ata40(pdev)) return ATA_CBL_PATA40; return ATA_CBL_PATA80; } /** * sis_66_cable_detect - check for 40/80 pin * @ap: Port * * Perform cable detection on the UDMA66, UDMA100 and early UDMA133 * SiS IDE controllers. */ static int sis_66_cable_detect(struct ata_port *ap) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); u8 tmp; /* Older chips keep cable detect in bits 4/5 of reg 0x48 */ pci_read_config_byte(pdev, 0x48, &tmp); tmp >>= ap->port_no; if ((tmp & 0x10) && !sis_short_ata40(pdev)) return ATA_CBL_PATA40; return ATA_CBL_PATA80; } /** * sis_pre_reset - probe begin * @link: ATA link * @deadline: deadline jiffies for the operation * * Set up cable type and use generic probe init */ static int sis_pre_reset(struct ata_link *link, unsigned long deadline) { static const struct pci_bits sis_enable_bits[] = { { 0x4aU, 1U, 0x02UL, 0x02UL }, /* port 0 */ { 0x4aU, 1U, 0x04UL, 0x04UL }, /* port 1 */ }; struct ata_port *ap = link->ap; struct pci_dev *pdev = to_pci_dev(ap->host->dev); if (!pci_test_config_bits(pdev, &sis_enable_bits[ap->port_no])) return -ENOENT; /* Clear the FIFO settings. We can't enable the FIFO until we know we are poking at a disk */ pci_write_config_byte(pdev, 0x4B, 0); return ata_sff_prereset(link, deadline); } /** * sis_set_fifo - Set RWP fifo bits for this device * @ap: Port * @adev: Device * * SIS chipsets implement prefetch/postwrite bits for each device * on both channels. This functionality is not ATAPI compatible and * must be configured according to the class of device present */ static void sis_set_fifo(struct ata_port *ap, struct ata_device *adev) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); u8 fifoctrl; u8 mask = 0x11; mask <<= (2 * ap->port_no); mask <<= adev->devno; /* This holds various bits including the FIFO control */ pci_read_config_byte(pdev, 0x4B, &fifoctrl); fifoctrl &= ~mask; /* Enable for ATA (disk) only */ if (adev->class == ATA_DEV_ATA) fifoctrl |= mask; pci_write_config_byte(pdev, 0x4B, fifoctrl); } /** * sis_old_set_piomode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring * @adev: Device we are configuring for. * * Set PIO mode for device, in host controller PCI config space. This * function handles PIO set up for all chips that are pre ATA100 and * also early ATA100 devices. * * LOCKING: * None (inherited from caller). */ static void sis_old_set_piomode (struct ata_port *ap, struct ata_device *adev) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); int port = sis_old_port_base(adev); u8 t1, t2; int speed = adev->pio_mode - XFER_PIO_0; static const u8 active[] = { 0x00, 0x07, 0x04, 0x03, 0x01 }; static const u8 recovery[] = { 0x00, 0x06, 0x04, 0x03, 0x03 }; sis_set_fifo(ap, adev); pci_read_config_byte(pdev, port, &t1); pci_read_config_byte(pdev, port + 1, &t2); t1 &= ~0x0F; /* Clear active/recovery timings */ t2 &= ~0x07; t1 |= active[speed]; t2 |= recovery[speed]; pci_write_config_byte(pdev, port, t1); pci_write_config_byte(pdev, port + 1, t2); } /** * sis_100_set_piomode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring * @adev: Device we are configuring for. * * Set PIO mode for device, in host controller PCI config space. This * function handles PIO set up for ATA100 devices and early ATA133. * * LOCKING: * None (inherited from caller). */ static void sis_100_set_piomode (struct ata_port *ap, struct ata_device *adev) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); int port = sis_old_port_base(adev); int speed = adev->pio_mode - XFER_PIO_0; static const u8 actrec[] = { 0x00, 0x67, 0x44, 0x33, 0x31 }; sis_set_fifo(ap, adev); pci_write_config_byte(pdev, port, actrec[speed]); } /** * sis_133_set_piomode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring * @adev: Device we are configuring for. * * Set PIO mode for device, in host controller PCI config space. This * function handles PIO set up for the later ATA133 devices. * * LOCKING: * None (inherited from caller). */ static void sis_133_set_piomode (struct ata_port *ap, struct ata_device *adev) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); int port; u32 t1; int speed = adev->pio_mode - XFER_PIO_0; static const u32 timing133[] = { 0x28269000, /* Recovery << 24 | Act << 16 | Ini << 12 */ 0x0C266000, 0x04263000, 0x0C0A3000, 0x05093000 }; static const u32 timing100[] = { 0x1E1C6000, /* Recovery << 24 | Act << 16 | Ini << 12 */ 0x091C4000, 0x031C2000, 0x09072000, 0x04062000 }; sis_set_fifo(ap, adev); port = sis_port_base(adev); pci_read_config_dword(pdev, port, &t1); t1 &= 0xC0C00FFF; /* Mask out timing */ if (t1 & 0x08) /* 100 or 133 ? */ t1 |= timing133[speed]; else t1 |= timing100[speed]; pci_write_config_byte(pdev, port, t1); } /** * sis_old_set_dmamode - Initialize host controller PATA DMA timings * @ap: Port whose timings we are configuring * @adev: Device to program * * Set UDMA/MWDMA mode for device, in host controller PCI config space. * Handles pre UDMA and UDMA33 devices. Supports MWDMA as well unlike * the old ide/pci driver. * * LOCKING: * None (inherited from caller). */ static void sis_old_set_dmamode (struct ata_port *ap, struct ata_device *adev) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); int speed = adev->dma_mode - XFER_MW_DMA_0; int drive_pci = sis_old_port_base(adev); u16 timing; static const u16 mwdma_bits[] = { 0x008, 0x302, 0x301 }; static const u16 udma_bits[] = { 0xE000, 0xC000, 0xA000 }; pci_read_config_word(pdev, drive_pci, &timing); if (adev->dma_mode < XFER_UDMA_0) { /* bits 3-0 hold recovery timing bits 8-10 active timing and the higher bits are dependent on the device */ timing &= ~0x870F; timing |= mwdma_bits[speed]; } else { /* Bit 15 is UDMA on/off, bit 13-14 are cycle time */ speed = adev->dma_mode - XFER_UDMA_0; timing &= ~0x6000; timing |= udma_bits[speed]; } pci_write_config_word(pdev, drive_pci, timing); } /** * sis_66_set_dmamode - Initialize host controller PATA DMA timings * @ap: Port whose timings we are configuring * @adev: Device to program * * Set UDMA/MWDMA mode for device, in host controller PCI config space. * Handles UDMA66 and early UDMA100 devices. Supports MWDMA as well unlike * the old ide/pci driver. * * LOCKING: * None (inherited from caller). */ static void sis_66_set_dmamode (struct ata_port *ap, struct ata_device *adev) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); int speed = adev->dma_mode - XFER_MW_DMA_0; int drive_pci = sis_old_port_base(adev); u16 timing; /* MWDMA 0-2 and UDMA 0-5 */ static const u16 mwdma_bits[] = { 0x008, 0x302, 0x301 }; static const u16 udma_bits[] = { 0xF000, 0xD000, 0xB000, 0xA000, 0x9000, 0x8000 }; pci_read_config_word(pdev, drive_pci, &timing); if (adev->dma_mode < XFER_UDMA_0) { /* bits 3-0 hold recovery timing bits 8-10 active timing and the higher bits are dependent on the device, bit 15 udma */ timing &= ~0x870F; timing |= mwdma_bits[speed]; } else { /* Bit 15 is UDMA on/off, bit 12-14 are cycle time */ speed = adev->dma_mode - XFER_UDMA_0; timing &= ~0xF000; timing |= udma_bits[speed]; } pci_write_config_word(pdev, drive_pci, timing); } /** * sis_100_set_dmamode - Initialize host controller PATA DMA timings * @ap: Port whose timings we are configuring * @adev: Device to program * * Set UDMA/MWDMA mode for device, in host controller PCI config space. * Handles UDMA66 and early UDMA100 devices. * * LOCKING: * None (inherited from caller). */ static void sis_100_set_dmamode (struct ata_port *ap, struct ata_device *adev) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); int speed = adev->dma_mode - XFER_MW_DMA_0; int drive_pci = sis_old_port_base(adev); u8 timing; static const u8 udma_bits[] = { 0x8B, 0x87, 0x85, 0x83, 0x82, 0x81}; pci_read_config_byte(pdev, drive_pci + 1, &timing); if (adev->dma_mode < XFER_UDMA_0) { /* NOT SUPPORTED YET: NEED DATA SHEET. DITTO IN OLD DRIVER */ } else { /* Bit 7 is UDMA on/off, bit 0-3 are cycle time */ speed = adev->dma_mode - XFER_UDMA_0; timing &= ~0x8F; timing |= udma_bits[speed]; } pci_write_config_byte(pdev, drive_pci + 1, timing); } /** * sis_133_early_set_dmamode - Initialize host controller PATA DMA timings * @ap: Port whose timings we are configuring * @adev: Device to program * * Set UDMA/MWDMA mode for device, in host controller PCI config space. * Handles early SiS 961 bridges. * * LOCKING: * None (inherited from caller). */ static void sis_133_early_set_dmamode (struct ata_port *ap, struct ata_device *adev) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); int speed = adev->dma_mode - XFER_MW_DMA_0; int drive_pci = sis_old_port_base(adev); u8 timing; /* Low 4 bits are timing */ static const u8 udma_bits[] = { 0x8F, 0x8A, 0x87, 0x85, 0x83, 0x82, 0x81}; pci_read_config_byte(pdev, drive_pci + 1, &timing); if (adev->dma_mode < XFER_UDMA_0) { /* NOT SUPPORTED YET: NEED DATA SHEET. DITTO IN OLD DRIVER */ } else { /* Bit 7 is UDMA on/off, bit 0-3 are cycle time */ speed = adev->dma_mode - XFER_UDMA_0; timing &= ~0x8F; timing |= udma_bits[speed]; } pci_write_config_byte(pdev, drive_pci + 1, timing); } /** * sis_133_set_dmamode - Initialize host controller PATA DMA timings * @ap: Port whose timings we are configuring * @adev: Device to program * * Set UDMA/MWDMA mode for device, in host controller PCI config space. * * LOCKING: * None (inherited from caller). */ static void sis_133_set_dmamode (struct ata_port *ap, struct ata_device *adev) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); int port; u32 t1; port = sis_port_base(adev); pci_read_config_dword(pdev, port, &t1); if (adev->dma_mode < XFER_UDMA_0) { /* Recovery << 24 | Act << 16 | Ini << 12, like PIO modes */ static const u32 timing_u100[] = { 0x19154000, 0x06072000, 0x04062000 }; static const u32 timing_u133[] = { 0x221C6000, 0x0C0A3000, 0x05093000 }; int speed = adev->dma_mode - XFER_MW_DMA_0; t1 &= 0xC0C00FFF; /* disable UDMA */ t1 &= ~0x00000004; if (t1 & 0x08) t1 |= timing_u133[speed]; else t1 |= timing_u100[speed]; } else { /* bits 4- cycle time 8 - cvs time */ static const u32 timing_u100[] = { 0x6B0, 0x470, 0x350, 0x140, 0x120, 0x110, 0x000 }; static const u32 timing_u133[] = { 0x9F0, 0x6A0, 0x470, 0x250, 0x230, 0x220, 0x210 }; int speed = adev->dma_mode - XFER_UDMA_0; t1 &= ~0x00000FF0; /* enable UDMA */ t1 |= 0x00000004; if (t1 & 0x08) t1 |= timing_u133[speed]; else t1 |= timing_u100[speed]; } pci_write_config_dword(pdev, port, t1); } /** * sis_133_mode_filter - mode selection filter * @adev: ATA device * * Block UDMA6 on devices that do not support it. */ static unsigned long sis_133_mode_filter(struct ata_device *adev, unsigned long mask) { struct ata_port *ap = adev->link->ap; struct pci_dev *pdev = to_pci_dev(ap->host->dev); int port = sis_port_base(adev); u32 t1; pci_read_config_dword(pdev, port, &t1); /* if ATA133 is disabled, mask it out */ if (!(t1 & 0x08)) mask &= ~(0xC0 << ATA_SHIFT_UDMA); return mask; } static struct scsi_host_template sis_sht = { ATA_BMDMA_SHT(DRV_NAME), }; static struct ata_port_operations sis_133_for_sata_ops = { .inherits = &ata_bmdma_port_ops, .set_piomode = sis_133_set_piomode, .set_dmamode = sis_133_set_dmamode, .cable_detect = sis_133_cable_detect, }; static struct ata_port_operations sis_base_ops = { .inherits = &ata_bmdma_port_ops, .prereset = sis_pre_reset, }; static struct ata_port_operations sis_133_ops = { .inherits = &sis_base_ops, .set_piomode = sis_133_set_piomode, .set_dmamode = sis_133_set_dmamode, .cable_detect = sis_133_cable_detect, .mode_filter = sis_133_mode_filter, }; static struct ata_port_operations sis_133_early_ops = { .inherits = &sis_base_ops, .set_piomode = sis_100_set_piomode, .set_dmamode = sis_133_early_set_dmamode, .cable_detect = sis_66_cable_detect, }; static struct ata_port_operations sis_100_ops = { .inherits = &sis_base_ops, .set_piomode = sis_100_set_piomode, .set_dmamode = sis_100_set_dmamode, .cable_detect = sis_66_cable_detect, }; static struct ata_port_operations sis_66_ops = { .inherits = &sis_base_ops, .set_piomode = sis_old_set_piomode, .set_dmamode = sis_66_set_dmamode, .cable_detect = sis_66_cable_detect, }; static struct ata_port_operations sis_old_ops = { .inherits = &sis_base_ops, .set_piomode = sis_old_set_piomode, .set_dmamode = sis_old_set_dmamode, .cable_detect = ata_cable_40wire, }; static const struct ata_port_info sis_info = { .flags = ATA_FLAG_SLAVE_POSS, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, /* No UDMA */ .port_ops = &sis_old_ops, }; static const struct ata_port_info sis_info33 = { .flags = ATA_FLAG_SLAVE_POSS, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, .udma_mask = ATA_UDMA2, .port_ops = &sis_old_ops, }; static const struct ata_port_info sis_info66 = { .flags = ATA_FLAG_SLAVE_POSS, .pio_mask = ATA_PIO4, /* No MWDMA */ .udma_mask = ATA_UDMA4, .port_ops = &sis_66_ops, }; static const struct ata_port_info sis_info100 = { .flags = ATA_FLAG_SLAVE_POSS, .pio_mask = ATA_PIO4, /* No MWDMA */ .udma_mask = ATA_UDMA5, .port_ops = &sis_100_ops, }; static const struct ata_port_info sis_info100_early = { .flags = ATA_FLAG_SLAVE_POSS, .pio_mask = ATA_PIO4, /* No MWDMA */ .udma_mask = ATA_UDMA5, .port_ops = &sis_66_ops, }; static const struct ata_port_info sis_info133 = { .flags = ATA_FLAG_SLAVE_POSS, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, .udma_mask = ATA_UDMA6, .port_ops = &sis_133_ops, }; const struct ata_port_info sis_info133_for_sata = { .flags = ATA_FLAG_SLAVE_POSS, .pio_mask = ATA_PIO4, /* No MWDMA */ .udma_mask = ATA_UDMA6, .port_ops = &sis_133_for_sata_ops, }; static const struct ata_port_info sis_info133_early = { .flags = ATA_FLAG_SLAVE_POSS, .pio_mask = ATA_PIO4, /* No MWDMA */ .udma_mask = ATA_UDMA6, .port_ops = &sis_133_early_ops, }; /* Privately shared with the SiS180 SATA driver, not for use elsewhere */ EXPORT_SYMBOL_GPL(sis_info133_for_sata); static void sis_fixup(struct pci_dev *pdev, struct sis_chipset *sis) { u16 regw; u8 reg; if (sis->info == &sis_info133) { pci_read_config_word(pdev, 0x50, ®w); if (regw & 0x08) pci_write_config_word(pdev, 0x50, regw & ~0x08); pci_read_config_word(pdev, 0x52, ®w); if (regw & 0x08) pci_write_config_word(pdev, 0x52, regw & ~0x08); return; } if (sis->info == &sis_info133_early || sis->info == &sis_info100) { /* Fix up latency */ pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x80); /* Set compatibility bit */ pci_read_config_byte(pdev, 0x49, ®); if (!(reg & 0x01)) pci_write_config_byte(pdev, 0x49, reg | 0x01); return; } if (sis->info == &sis_info66 || sis->info == &sis_info100_early) { /* Fix up latency */ pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x80); /* Set compatibility bit */ pci_read_config_byte(pdev, 0x52, ®); if (!(reg & 0x04)) pci_write_config_byte(pdev, 0x52, reg | 0x04); return; } if (sis->info == &sis_info33) { pci_read_config_byte(pdev, PCI_CLASS_PROG, ®); if (( reg & 0x0F ) != 0x00) pci_write_config_byte(pdev, PCI_CLASS_PROG, reg & 0xF0); /* Fall through to ATA16 fixup below */ } if (sis->info == &sis_info || sis->info == &sis_info33) { /* force per drive recovery and active timings needed on ATA_33 and below chips */ pci_read_config_byte(pdev, 0x52, ®); if (!(reg & 0x08)) pci_write_config_byte(pdev, 0x52, reg|0x08); return; } BUG(); } /** * sis_init_one - Register SiS ATA PCI device with kernel services * @pdev: PCI device to register * @ent: Entry in sis_pci_tbl matching with @pdev * * Called from kernel PCI layer. We probe for combined mode (sigh), * and then hand over control to libata, for it to do the rest. * * LOCKING: * Inherited from PCI layer (may sleep). * * RETURNS: * Zero on success, or -ERRNO value. */ static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) { const struct ata_port_info *ppi[] = { NULL, NULL }; struct pci_dev *host = NULL; struct sis_chipset *chipset = NULL; struct sis_chipset *sets; int rc; static struct sis_chipset sis_chipsets[] = { { 0x0968, &sis_info133 }, { 0x0966, &sis_info133 }, { 0x0965, &sis_info133 }, { 0x0745, &sis_info100 }, { 0x0735, &sis_info100 }, { 0x0733, &sis_info100 }, { 0x0635, &sis_info100 }, { 0x0633, &sis_info100 }, { 0x0730, &sis_info100_early }, /* 100 with ATA 66 layout */ { 0x0550, &sis_info100_early }, /* 100 with ATA 66 layout */ { 0x0640, &sis_info66 }, { 0x0630, &sis_info66 }, { 0x0620, &sis_info66 }, { 0x0540, &sis_info66 }, { 0x0530, &sis_info66 }, { 0x5600, &sis_info33 }, { 0x5598, &sis_info33 }, { 0x5597, &sis_info33 }, { 0x5591, &sis_info33 }, { 0x5582, &sis_info33 }, { 0x5581, &sis_info33 }, { 0x5596, &sis_info }, { 0x5571, &sis_info }, { 0x5517, &sis_info }, { 0x5511, &sis_info }, {0} }; static struct sis_chipset sis133_early = { 0x0, &sis_info133_early }; static struct sis_chipset sis133 = { 0x0, &sis_info133 }; static struct sis_chipset sis100_early = { 0x0, &sis_info100_early }; static struct sis_chipset sis100 = { 0x0, &sis_info100 }; ata_print_version_once(&pdev->dev, DRV_VERSION); rc = pcim_enable_device(pdev); if (rc) return rc; /* We have to find the bridge first */ for (sets = &sis_chipsets[0]; sets->device; sets++) { host = pci_get_device(PCI_VENDOR_ID_SI, sets->device, NULL); if (host != NULL) { chipset = sets; /* Match found */ if (sets->device == 0x630) { /* SIS630 */ if (host->revision >= 0x30) /* 630 ET */ chipset = &sis100_early; } break; } } /* Look for concealed bridges */ if (chipset == NULL) { /* Second check */ u32 idemisc; u16 trueid; /* Disable ID masking and register remapping then see what the real ID is */ pci_read_config_dword(pdev, 0x54, &idemisc); pci_write_config_dword(pdev, 0x54, idemisc & 0x7fffffff); pci_read_config_word(pdev, PCI_DEVICE_ID, &trueid); pci_write_config_dword(pdev, 0x54, idemisc); switch(trueid) { case 0x5518: /* SIS 962/963 */ dev_info(&pdev->dev, "SiS 962/963 MuTIOL IDE UDMA133 controller\n"); chipset = &sis133; if ((idemisc & 0x40000000) == 0) { pci_write_config_dword(pdev, 0x54, idemisc | 0x40000000); dev_info(&pdev->dev, "Switching to 5513 register mapping\n"); } break; case 0x0180: /* SIS 965/965L */ chipset = &sis133; break; case 0x1180: /* SIS 966/966L */ chipset = &sis133; break; } } /* Further check */ if (chipset == NULL) { struct pci_dev *lpc_bridge; u16 trueid; u8 prefctl; u8 idecfg; /* Try the second unmasking technique */ pci_read_config_byte(pdev, 0x4a, &idecfg); pci_write_config_byte(pdev, 0x4a, idecfg | 0x10); pci_read_config_word(pdev, PCI_DEVICE_ID, &trueid); pci_write_config_byte(pdev, 0x4a, idecfg); switch(trueid) { case 0x5517: lpc_bridge = pci_get_slot(pdev->bus, 0x10); /* Bus 0 Dev 2 Fn 0 */ if (lpc_bridge == NULL) break; pci_read_config_byte(pdev, 0x49, &prefctl); pci_dev_put(lpc_bridge); if (lpc_bridge->revision == 0x10 && (prefctl & 0x80)) { chipset = &sis133_early; break; } chipset = &sis100; break; } } pci_dev_put(host); /* No chipset info, no support */ if (chipset == NULL) return -ENODEV; ppi[0] = chipset->info; sis_fixup(pdev, chipset); return ata_pci_bmdma_init_one(pdev, ppi, &sis_sht, chipset, 0); } #ifdef CONFIG_PM static int sis_reinit_one(struct pci_dev *pdev) { struct ata_host *host = pci_get_drvdata(pdev); int rc; rc = ata_pci_device_do_resume(pdev); if (rc) return rc; sis_fixup(pdev, host->private_data); ata_host_resume(host); return 0; } #endif static const struct pci_device_id sis_pci_tbl[] = { { PCI_VDEVICE(SI, 0x5513), }, /* SiS 5513 */ { PCI_VDEVICE(SI, 0x5518), }, /* SiS 5518 */ { PCI_VDEVICE(SI, 0x1180), }, /* SiS 1180 */ { } }; static struct pci_driver sis_pci_driver = { .name = DRV_NAME, .id_table = sis_pci_tbl, .probe = sis_init_one, .remove = ata_pci_remove_one, #ifdef CONFIG_PM .suspend = ata_pci_device_suspend, .resume = sis_reinit_one, #endif }; module_pci_driver(sis_pci_driver); MODULE_AUTHOR("Alan Cox"); MODULE_DESCRIPTION("SCSI low-level driver for SiS ATA"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, sis_pci_tbl); MODULE_VERSION(DRV_VERSION);