| /* |
| * pata_via.c - VIA PATA for new ATA layer |
| * (C) 2005-2006 Red Hat Inc |
| * Alan Cox <alan@redhat.com> |
| * |
| * Documentation |
| * Most chipset documentation available under NDA only |
| * |
| * VIA version guide |
| * VIA VT82C561 - early design, uses ata_generic currently |
| * VIA VT82C576 - MWDMA, 33Mhz |
| * VIA VT82C586 - MWDMA, 33Mhz |
| * VIA VT82C586a - Added UDMA to 33Mhz |
| * VIA VT82C586b - UDMA33 |
| * VIA VT82C596a - Nonfunctional UDMA66 |
| * VIA VT82C596b - Working UDMA66 |
| * VIA VT82C686 - Nonfunctional UDMA66 |
| * VIA VT82C686a - Working UDMA66 |
| * VIA VT82C686b - Updated to UDMA100 |
| * VIA VT8231 - UDMA100 |
| * VIA VT8233 - UDMA100 |
| * VIA VT8233a - UDMA133 |
| * VIA VT8233c - UDMA100 |
| * VIA VT8235 - UDMA133 |
| * VIA VT8237 - UDMA133 |
| * VIA VT8237S - UDMA133 |
| * VIA VT8251 - UDMA133 |
| * |
| * Most registers remain compatible across chips. Others start reserved |
| * and acquire sensible semantics if set to 1 (eg cable detect). A few |
| * exceptions exist, notably around the FIFO settings. |
| * |
| * One additional quirk of the VIA design is that like ALi they use few |
| * PCI IDs for a lot of chips. |
| * |
| * Based heavily on: |
| * |
| * Version 3.38 |
| * |
| * VIA IDE driver for Linux. Supported southbridges: |
| * |
| * vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b, |
| * vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a, |
| * vt8235, vt8237 |
| * |
| * Copyright (c) 2000-2002 Vojtech Pavlik |
| * |
| * Based on the work of: |
| * Michel Aubry |
| * Jeff Garzik |
| * Andre Hedrick |
| |
| */ |
| |
| #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 <scsi/scsi_host.h> |
| #include <linux/libata.h> |
| #include <linux/dmi.h> |
| |
| #define DRV_NAME "pata_via" |
| #define DRV_VERSION "0.3.3" |
| |
| /* |
| * The following comes directly from Vojtech Pavlik's ide/pci/via82cxxx |
| * driver. |
| */ |
| |
| enum { |
| VIA_UDMA = 0x007, |
| VIA_UDMA_NONE = 0x000, |
| VIA_UDMA_33 = 0x001, |
| VIA_UDMA_66 = 0x002, |
| VIA_UDMA_100 = 0x003, |
| VIA_UDMA_133 = 0x004, |
| VIA_BAD_PREQ = 0x010, /* Crashes if PREQ# till DDACK# set */ |
| VIA_BAD_CLK66 = 0x020, /* 66 MHz clock doesn't work correctly */ |
| VIA_SET_FIFO = 0x040, /* Needs to have FIFO split set */ |
| VIA_NO_UNMASK = 0x080, /* Doesn't work with IRQ unmasking on */ |
| VIA_BAD_ID = 0x100, /* Has wrong vendor ID (0x1107) */ |
| VIA_BAD_AST = 0x200, /* Don't touch Address Setup Timing */ |
| VIA_NO_ENABLES = 0x400, /* Has no enablebits */ |
| VIA_SATA_PATA = 0x800, /* SATA/PATA combined configuration */ |
| }; |
| |
| /* |
| * VIA SouthBridge chips. |
| */ |
| |
| static const struct via_isa_bridge { |
| const char *name; |
| u16 id; |
| u8 rev_min; |
| u8 rev_max; |
| u16 flags; |
| } via_isa_bridges[] = { |
| { "vx800", PCI_DEVICE_ID_VIA_VX800, 0x00, 0x2f, VIA_UDMA_133 | |
| VIA_BAD_AST | VIA_SATA_PATA }, |
| { "vt8237s", PCI_DEVICE_ID_VIA_8237S, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST }, |
| { "vt8251", PCI_DEVICE_ID_VIA_8251, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST }, |
| { "cx700", PCI_DEVICE_ID_VIA_CX700, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST | VIA_SATA_PATA }, |
| { "vt6410", PCI_DEVICE_ID_VIA_6410, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST | VIA_NO_ENABLES}, |
| { "vt8237a", PCI_DEVICE_ID_VIA_8237A, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST }, |
| { "vt8237", PCI_DEVICE_ID_VIA_8237, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST }, |
| { "vt8235", PCI_DEVICE_ID_VIA_8235, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST }, |
| { "vt8233a", PCI_DEVICE_ID_VIA_8233A, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST }, |
| { "vt8233c", PCI_DEVICE_ID_VIA_8233C_0, 0x00, 0x2f, VIA_UDMA_100 }, |
| { "vt8233", PCI_DEVICE_ID_VIA_8233_0, 0x00, 0x2f, VIA_UDMA_100 }, |
| { "vt8231", PCI_DEVICE_ID_VIA_8231, 0x00, 0x2f, VIA_UDMA_100 }, |
| { "vt82c686b", PCI_DEVICE_ID_VIA_82C686, 0x40, 0x4f, VIA_UDMA_100 }, |
| { "vt82c686a", PCI_DEVICE_ID_VIA_82C686, 0x10, 0x2f, VIA_UDMA_66 }, |
| { "vt82c686", PCI_DEVICE_ID_VIA_82C686, 0x00, 0x0f, VIA_UDMA_33 | VIA_BAD_CLK66 }, |
| { "vt82c596b", PCI_DEVICE_ID_VIA_82C596, 0x10, 0x2f, VIA_UDMA_66 }, |
| { "vt82c596a", PCI_DEVICE_ID_VIA_82C596, 0x00, 0x0f, VIA_UDMA_33 | VIA_BAD_CLK66 }, |
| { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, VIA_UDMA_33 | VIA_SET_FIFO }, |
| { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, VIA_UDMA_33 | VIA_SET_FIFO | VIA_BAD_PREQ }, |
| { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, VIA_UDMA_33 | VIA_SET_FIFO }, |
| { "vt82c586a", PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, VIA_UDMA_33 | VIA_SET_FIFO }, |
| { "vt82c586", PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f, VIA_UDMA_NONE | VIA_SET_FIFO }, |
| { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, VIA_UDMA_NONE | VIA_SET_FIFO | VIA_NO_UNMASK }, |
| { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, VIA_UDMA_NONE | VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID }, |
| { NULL } |
| }; |
| |
| |
| /* |
| * Cable special cases |
| */ |
| |
| static const struct dmi_system_id cable_dmi_table[] = { |
| { |
| .ident = "Acer Ferrari 3400", |
| .matches = { |
| DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."), |
| DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"), |
| }, |
| }, |
| { } |
| }; |
| |
| static int via_cable_override(struct pci_dev *pdev) |
| { |
| /* Systems by DMI */ |
| if (dmi_check_system(cable_dmi_table)) |
| return 1; |
| /* Arima W730-K8/Targa Visionary 811/... */ |
| if (pdev->subsystem_vendor == 0x161F && pdev->subsystem_device == 0x2032) |
| return 1; |
| return 0; |
| } |
| |
| |
| /** |
| * via_cable_detect - cable detection |
| * @ap: ATA port |
| * |
| * Perform cable detection. Actually for the VIA case the BIOS |
| * already did this for us. We read the values provided by the |
| * BIOS. If you are using an 8235 in a non-PC configuration you |
| * may need to update this code. |
| * |
| * Hotplug also impacts on this. |
| */ |
| |
| static int via_cable_detect(struct ata_port *ap) { |
| const struct via_isa_bridge *config = ap->host->private_data; |
| struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
| u32 ata66; |
| |
| if (via_cable_override(pdev)) |
| return ATA_CBL_PATA40_SHORT; |
| |
| if ((config->flags & VIA_SATA_PATA) && ap->port_no == 0) |
| return ATA_CBL_SATA; |
| |
| /* Early chips are 40 wire */ |
| if ((config->flags & VIA_UDMA) < VIA_UDMA_66) |
| return ATA_CBL_PATA40; |
| /* UDMA 66 chips have only drive side logic */ |
| else if ((config->flags & VIA_UDMA) < VIA_UDMA_100) |
| return ATA_CBL_PATA_UNK; |
| /* UDMA 100 or later */ |
| pci_read_config_dword(pdev, 0x50, &ata66); |
| /* Check both the drive cable reporting bits, we might not have |
| two drives */ |
| if (ata66 & (0x10100000 >> (16 * ap->port_no))) |
| return ATA_CBL_PATA80; |
| /* Check with ACPI so we can spot BIOS reported SATA bridges */ |
| if (ata_acpi_init_gtm(ap) && |
| ata_acpi_cbl_80wire(ap, ata_acpi_init_gtm(ap))) |
| return ATA_CBL_PATA80; |
| return ATA_CBL_PATA40; |
| } |
| |
| static int via_pre_reset(struct ata_link *link, unsigned long deadline) |
| { |
| struct ata_port *ap = link->ap; |
| const struct via_isa_bridge *config = ap->host->private_data; |
| |
| if (!(config->flags & VIA_NO_ENABLES)) { |
| static const struct pci_bits via_enable_bits[] = { |
| { 0x40, 1, 0x02, 0x02 }, |
| { 0x40, 1, 0x01, 0x01 } |
| }; |
| struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
| if (!pci_test_config_bits(pdev, &via_enable_bits[ap->port_no])) |
| return -ENOENT; |
| } |
| |
| return ata_sff_prereset(link, deadline); |
| } |
| |
| |
| /** |
| * via_do_set_mode - set initial PIO mode data |
| * @ap: ATA interface |
| * @adev: ATA device |
| * @mode: ATA mode being programmed |
| * @tdiv: Clocks per PCI clock |
| * @set_ast: Set to program address setup |
| * @udma_type: UDMA mode/format of registers |
| * |
| * Program the VIA registers for DMA and PIO modes. Uses the ata timing |
| * support in order to compute modes. |
| * |
| * FIXME: Hotplug will require we serialize multiple mode changes |
| * on the two channels. |
| */ |
| |
| static void via_do_set_mode(struct ata_port *ap, struct ata_device *adev, int mode, int tdiv, int set_ast, int udma_type) |
| { |
| struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
| struct ata_device *peer = ata_dev_pair(adev); |
| struct ata_timing t, p; |
| static int via_clock = 33333; /* Bus clock in kHZ - ought to be tunable one day */ |
| unsigned long T = 1000000000 / via_clock; |
| unsigned long UT = T/tdiv; |
| int ut; |
| int offset = 3 - (2*ap->port_no) - adev->devno; |
| |
| /* Calculate the timing values we require */ |
| ata_timing_compute(adev, mode, &t, T, UT); |
| |
| /* We share 8bit timing so we must merge the constraints */ |
| if (peer) { |
| if (peer->pio_mode) { |
| ata_timing_compute(peer, peer->pio_mode, &p, T, UT); |
| ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT); |
| } |
| } |
| |
| /* Address setup is programmable but breaks on UDMA133 setups */ |
| if (set_ast) { |
| u8 setup; /* 2 bits per drive */ |
| int shift = 2 * offset; |
| |
| pci_read_config_byte(pdev, 0x4C, &setup); |
| setup &= ~(3 << shift); |
| setup |= clamp_val(t.setup, 1, 4) << shift; /* 1,4 or 1,4 - 1 FIXME */ |
| pci_write_config_byte(pdev, 0x4C, setup); |
| } |
| |
| /* Load the PIO mode bits */ |
| pci_write_config_byte(pdev, 0x4F - ap->port_no, |
| ((clamp_val(t.act8b, 1, 16) - 1) << 4) | (clamp_val(t.rec8b, 1, 16) - 1)); |
| pci_write_config_byte(pdev, 0x48 + offset, |
| ((clamp_val(t.active, 1, 16) - 1) << 4) | (clamp_val(t.recover, 1, 16) - 1)); |
| |
| /* Load the UDMA bits according to type */ |
| switch(udma_type) { |
| default: |
| /* BUG() ? */ |
| /* fall through */ |
| case 33: |
| ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 5) - 2)) : 0x03; |
| break; |
| case 66: |
| ut = t.udma ? (0xe8 | (clamp_val(t.udma, 2, 9) - 2)) : 0x0f; |
| break; |
| case 100: |
| ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 9) - 2)) : 0x07; |
| break; |
| case 133: |
| ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 9) - 2)) : 0x07; |
| break; |
| } |
| |
| /* Set UDMA unless device is not UDMA capable */ |
| if (udma_type && t.udma) { |
| u8 cable80_status; |
| |
| /* Get 80-wire cable detection bit */ |
| pci_read_config_byte(pdev, 0x50 + offset, &cable80_status); |
| cable80_status &= 0x10; |
| |
| pci_write_config_byte(pdev, 0x50 + offset, ut | cable80_status); |
| } |
| } |
| |
| static void via_set_piomode(struct ata_port *ap, struct ata_device *adev) |
| { |
| const struct via_isa_bridge *config = ap->host->private_data; |
| int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1; |
| int mode = config->flags & VIA_UDMA; |
| static u8 tclock[5] = { 1, 1, 2, 3, 4 }; |
| static u8 udma[5] = { 0, 33, 66, 100, 133 }; |
| |
| via_do_set_mode(ap, adev, adev->pio_mode, tclock[mode], set_ast, udma[mode]); |
| } |
| |
| static void via_set_dmamode(struct ata_port *ap, struct ata_device *adev) |
| { |
| const struct via_isa_bridge *config = ap->host->private_data; |
| int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1; |
| int mode = config->flags & VIA_UDMA; |
| static u8 tclock[5] = { 1, 1, 2, 3, 4 }; |
| static u8 udma[5] = { 0, 33, 66, 100, 133 }; |
| |
| via_do_set_mode(ap, adev, adev->dma_mode, tclock[mode], set_ast, udma[mode]); |
| } |
| |
| /** |
| * via_ata_sff_tf_load - send taskfile registers to host controller |
| * @ap: Port to which output is sent |
| * @tf: ATA taskfile register set |
| * |
| * Outputs ATA taskfile to standard ATA host controller. |
| * |
| * Note: This is to fix the internal bug of via chipsets, which |
| * will reset the device register after changing the IEN bit on |
| * ctl register |
| */ |
| static void via_ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) |
| { |
| struct ata_ioports *ioaddr = &ap->ioaddr; |
| unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; |
| |
| if (tf->ctl != ap->last_ctl) { |
| iowrite8(tf->ctl, ioaddr->ctl_addr); |
| iowrite8(tf->device, ioaddr->device_addr); |
| ap->last_ctl = tf->ctl; |
| ata_wait_idle(ap); |
| } |
| |
| if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) { |
| iowrite8(tf->hob_feature, ioaddr->feature_addr); |
| iowrite8(tf->hob_nsect, ioaddr->nsect_addr); |
| iowrite8(tf->hob_lbal, ioaddr->lbal_addr); |
| iowrite8(tf->hob_lbam, ioaddr->lbam_addr); |
| iowrite8(tf->hob_lbah, ioaddr->lbah_addr); |
| VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n", |
| tf->hob_feature, |
| tf->hob_nsect, |
| tf->hob_lbal, |
| tf->hob_lbam, |
| tf->hob_lbah); |
| } |
| |
| if (is_addr) { |
| iowrite8(tf->feature, ioaddr->feature_addr); |
| iowrite8(tf->nsect, ioaddr->nsect_addr); |
| iowrite8(tf->lbal, ioaddr->lbal_addr); |
| iowrite8(tf->lbam, ioaddr->lbam_addr); |
| iowrite8(tf->lbah, ioaddr->lbah_addr); |
| VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n", |
| tf->feature, |
| tf->nsect, |
| tf->lbal, |
| tf->lbam, |
| tf->lbah); |
| } |
| |
| if (tf->flags & ATA_TFLAG_DEVICE) { |
| iowrite8(tf->device, ioaddr->device_addr); |
| VPRINTK("device 0x%X\n", tf->device); |
| } |
| |
| ata_wait_idle(ap); |
| } |
| |
| static struct scsi_host_template via_sht = { |
| ATA_BMDMA_SHT(DRV_NAME), |
| }; |
| |
| static struct ata_port_operations via_port_ops = { |
| .inherits = &ata_bmdma_port_ops, |
| .cable_detect = via_cable_detect, |
| .set_piomode = via_set_piomode, |
| .set_dmamode = via_set_dmamode, |
| .prereset = via_pre_reset, |
| .sff_tf_load = via_ata_tf_load, |
| }; |
| |
| static struct ata_port_operations via_port_ops_noirq = { |
| .inherits = &via_port_ops, |
| .sff_data_xfer = ata_sff_data_xfer_noirq, |
| .sff_tf_load = via_ata_tf_load, |
| }; |
| |
| /** |
| * via_config_fifo - set up the FIFO |
| * @pdev: PCI device |
| * @flags: configuration flags |
| * |
| * Set the FIFO properties for this device if necessary. Used both on |
| * set up and on and the resume path |
| */ |
| |
| static void via_config_fifo(struct pci_dev *pdev, unsigned int flags) |
| { |
| u8 enable; |
| |
| /* 0x40 low bits indicate enabled channels */ |
| pci_read_config_byte(pdev, 0x40 , &enable); |
| enable &= 3; |
| |
| if (flags & VIA_SET_FIFO) { |
| static const u8 fifo_setting[4] = {0x00, 0x60, 0x00, 0x20}; |
| u8 fifo; |
| |
| pci_read_config_byte(pdev, 0x43, &fifo); |
| |
| /* Clear PREQ# until DDACK# for errata */ |
| if (flags & VIA_BAD_PREQ) |
| fifo &= 0x7F; |
| else |
| fifo &= 0x9f; |
| /* Turn on FIFO for enabled channels */ |
| fifo |= fifo_setting[enable]; |
| pci_write_config_byte(pdev, 0x43, fifo); |
| } |
| } |
| |
| /** |
| * via_init_one - discovery callback |
| * @pdev: PCI device |
| * @id: PCI table info |
| * |
| * A VIA IDE interface has been discovered. Figure out what revision |
| * and perform configuration work before handing it to the ATA layer |
| */ |
| |
| static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id) |
| { |
| /* Early VIA without UDMA support */ |
| static const struct ata_port_info via_mwdma_info = { |
| .flags = ATA_FLAG_SLAVE_POSS, |
| .pio_mask = 0x1f, |
| .mwdma_mask = 0x07, |
| .port_ops = &via_port_ops |
| }; |
| /* Ditto with IRQ masking required */ |
| static const struct ata_port_info via_mwdma_info_borked = { |
| .flags = ATA_FLAG_SLAVE_POSS, |
| .pio_mask = 0x1f, |
| .mwdma_mask = 0x07, |
| .port_ops = &via_port_ops_noirq, |
| }; |
| /* VIA UDMA 33 devices (and borked 66) */ |
| static const struct ata_port_info via_udma33_info = { |
| .flags = ATA_FLAG_SLAVE_POSS, |
| .pio_mask = 0x1f, |
| .mwdma_mask = 0x07, |
| .udma_mask = ATA_UDMA2, |
| .port_ops = &via_port_ops |
| }; |
| /* VIA UDMA 66 devices */ |
| static const struct ata_port_info via_udma66_info = { |
| .flags = ATA_FLAG_SLAVE_POSS, |
| .pio_mask = 0x1f, |
| .mwdma_mask = 0x07, |
| .udma_mask = ATA_UDMA4, |
| .port_ops = &via_port_ops |
| }; |
| /* VIA UDMA 100 devices */ |
| static const struct ata_port_info via_udma100_info = { |
| .flags = ATA_FLAG_SLAVE_POSS, |
| .pio_mask = 0x1f, |
| .mwdma_mask = 0x07, |
| .udma_mask = ATA_UDMA5, |
| .port_ops = &via_port_ops |
| }; |
| /* UDMA133 with bad AST (All current 133) */ |
| static const struct ata_port_info via_udma133_info = { |
| .flags = ATA_FLAG_SLAVE_POSS, |
| .pio_mask = 0x1f, |
| .mwdma_mask = 0x07, |
| .udma_mask = ATA_UDMA6, /* FIXME: should check north bridge */ |
| .port_ops = &via_port_ops |
| }; |
| const struct ata_port_info *ppi[] = { NULL, NULL }; |
| struct pci_dev *isa = NULL; |
| const struct via_isa_bridge *config; |
| static int printed_version; |
| u8 enable; |
| u32 timing; |
| int rc; |
| |
| if (!printed_version++) |
| dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); |
| |
| rc = pcim_enable_device(pdev); |
| if (rc) |
| return rc; |
| |
| /* To find out how the IDE will behave and what features we |
| actually have to look at the bridge not the IDE controller */ |
| for (config = via_isa_bridges; config->id; config++) |
| if ((isa = pci_get_device(PCI_VENDOR_ID_VIA + |
| !!(config->flags & VIA_BAD_ID), |
| config->id, NULL))) { |
| |
| if (isa->revision >= config->rev_min && |
| isa->revision <= config->rev_max) |
| break; |
| pci_dev_put(isa); |
| } |
| |
| if (!config->id) { |
| printk(KERN_WARNING "via: Unknown VIA SouthBridge, disabling.\n"); |
| return -ENODEV; |
| } |
| pci_dev_put(isa); |
| |
| if (!(config->flags & VIA_NO_ENABLES)) { |
| /* 0x40 low bits indicate enabled channels */ |
| pci_read_config_byte(pdev, 0x40 , &enable); |
| enable &= 3; |
| if (enable == 0) |
| return -ENODEV; |
| } |
| |
| /* Initialise the FIFO for the enabled channels. */ |
| via_config_fifo(pdev, config->flags); |
| |
| /* Clock set up */ |
| switch(config->flags & VIA_UDMA) { |
| case VIA_UDMA_NONE: |
| if (config->flags & VIA_NO_UNMASK) |
| ppi[0] = &via_mwdma_info_borked; |
| else |
| ppi[0] = &via_mwdma_info; |
| break; |
| case VIA_UDMA_33: |
| ppi[0] = &via_udma33_info; |
| break; |
| case VIA_UDMA_66: |
| ppi[0] = &via_udma66_info; |
| /* The 66 MHz devices require we enable the clock */ |
| pci_read_config_dword(pdev, 0x50, &timing); |
| timing |= 0x80008; |
| pci_write_config_dword(pdev, 0x50, timing); |
| break; |
| case VIA_UDMA_100: |
| ppi[0] = &via_udma100_info; |
| break; |
| case VIA_UDMA_133: |
| ppi[0] = &via_udma133_info; |
| break; |
| default: |
| WARN_ON(1); |
| return -ENODEV; |
| } |
| |
| if (config->flags & VIA_BAD_CLK66) { |
| /* Disable the 66MHz clock on problem devices */ |
| pci_read_config_dword(pdev, 0x50, &timing); |
| timing &= ~0x80008; |
| pci_write_config_dword(pdev, 0x50, timing); |
| } |
| |
| /* We have established the device type, now fire it up */ |
| return ata_pci_sff_init_one(pdev, ppi, &via_sht, (void *)config); |
| } |
| |
| #ifdef CONFIG_PM |
| /** |
| * via_reinit_one - reinit after resume |
| * @pdev; PCI device |
| * |
| * Called when the VIA PATA device is resumed. We must then |
| * reconfigure the fifo and other setup we may have altered. In |
| * addition the kernel needs to have the resume methods on PCI |
| * quirk supported. |
| */ |
| |
| static int via_reinit_one(struct pci_dev *pdev) |
| { |
| u32 timing; |
| struct ata_host *host = dev_get_drvdata(&pdev->dev); |
| const struct via_isa_bridge *config = host->private_data; |
| int rc; |
| |
| rc = ata_pci_device_do_resume(pdev); |
| if (rc) |
| return rc; |
| |
| via_config_fifo(pdev, config->flags); |
| |
| if ((config->flags & VIA_UDMA) == VIA_UDMA_66) { |
| /* The 66 MHz devices require we enable the clock */ |
| pci_read_config_dword(pdev, 0x50, &timing); |
| timing |= 0x80008; |
| pci_write_config_dword(pdev, 0x50, timing); |
| } |
| if (config->flags & VIA_BAD_CLK66) { |
| /* Disable the 66MHz clock on problem devices */ |
| pci_read_config_dword(pdev, 0x50, &timing); |
| timing &= ~0x80008; |
| pci_write_config_dword(pdev, 0x50, timing); |
| } |
| |
| ata_host_resume(host); |
| return 0; |
| } |
| #endif |
| |
| static const struct pci_device_id via[] = { |
| { PCI_VDEVICE(VIA, 0x0571), }, |
| { PCI_VDEVICE(VIA, 0x0581), }, |
| { PCI_VDEVICE(VIA, 0x1571), }, |
| { PCI_VDEVICE(VIA, 0x3164), }, |
| { PCI_VDEVICE(VIA, 0x5324), }, |
| |
| { }, |
| }; |
| |
| static struct pci_driver via_pci_driver = { |
| .name = DRV_NAME, |
| .id_table = via, |
| .probe = via_init_one, |
| .remove = ata_pci_remove_one, |
| #ifdef CONFIG_PM |
| .suspend = ata_pci_device_suspend, |
| .resume = via_reinit_one, |
| #endif |
| }; |
| |
| static int __init via_init(void) |
| { |
| return pci_register_driver(&via_pci_driver); |
| } |
| |
| static void __exit via_exit(void) |
| { |
| pci_unregister_driver(&via_pci_driver); |
| } |
| |
| MODULE_AUTHOR("Alan Cox"); |
| MODULE_DESCRIPTION("low-level driver for VIA PATA"); |
| MODULE_LICENSE("GPL"); |
| MODULE_DEVICE_TABLE(pci, via); |
| MODULE_VERSION(DRV_VERSION); |
| |
| module_init(via_init); |
| module_exit(via_exit); |