Release 4.11 drivers/ata/pata_via.c

/*
 * pata_via.c   - VIA PATA for new ATA layer
 *                        (C) 2005-2006 Red Hat Inc
 *
 *  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 VT8237A     -       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/blkdev.h>
#include <linux/delay.h>
#include <linux/gfp.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>
#include <linux/dmi.h>


#define DRV_NAME "pata_via"

#define DRV_VERSION "0.3.4"

enum {
	
VIA_BAD_PREQ	= 0x01, /* Crashes if PREQ# till DDACK# set */
	
VIA_BAD_CLK66	= 0x02, /* 66 MHz clock doesn't work correctly */
	
VIA_SET_FIFO	= 0x04, /* Needs to have FIFO split set */
	
VIA_NO_UNMASK	= 0x08, /* Doesn't work with IRQ unmasking on */
	
VIA_BAD_ID	= 0x10, /* Has wrong vendor ID (0x1107) */
	
VIA_BAD_AST	= 0x20, /* Don't touch Address Setup Timing */
	
VIA_NO_ENABLES	= 0x40, /* Has no enablebits */
	
VIA_SATA_PATA	= 0x80, /* SATA/PATA combined configuration */
};

enum {
	
VIA_IDFLAG_SINGLE = (1 << 0), /* single channel controller) */
};

/*
 * VIA SouthBridge chips.
 */


static const struct via_isa_bridge {
	
const char *name;
	
u16 id;
	
u8 rev_min;
	
u8 rev_max;
	
u8 udma_mask;
	
u8 flags;
} 
via_isa_bridges[] = {
	{ "vx855",	PCI_DEVICE_ID_VIA_VX855,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
	{ "vx800",	PCI_DEVICE_ID_VIA_VX800,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
	{ "vt8261",	PCI_DEVICE_ID_VIA_8261,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8237s",	PCI_DEVICE_ID_VIA_8237S,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8251",	PCI_DEVICE_ID_VIA_8251,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "cx700",	PCI_DEVICE_ID_VIA_CX700,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
	{ "vt6410",	PCI_DEVICE_ID_VIA_6410,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_NO_ENABLES },
	{ "vt6415",	PCI_DEVICE_ID_VIA_6415,     0x00, 0xff, ATA_UDMA6, VIA_BAD_AST | VIA_NO_ENABLES },
	{ "vt8237a",	PCI_DEVICE_ID_VIA_8237A,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8237",	PCI_DEVICE_ID_VIA_8237,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8235",	PCI_DEVICE_ID_VIA_8235,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8233a",	PCI_DEVICE_ID_VIA_8233A,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8233c",	PCI_DEVICE_ID_VIA_8233C_0,  0x00, 0x2f, ATA_UDMA5, },
	{ "vt8233",	PCI_DEVICE_ID_VIA_8233_0,   0x00, 0x2f, ATA_UDMA5, },
	{ "vt8231",	PCI_DEVICE_ID_VIA_8231,     0x00, 0x2f, ATA_UDMA5, },
	{ "vt82c686b",	PCI_DEVICE_ID_VIA_82C686,   0x40, 0x4f, ATA_UDMA5, },
	{ "vt82c686a",	PCI_DEVICE_ID_VIA_82C686,   0x10, 0x2f, ATA_UDMA4, },
	{ "vt82c686",	PCI_DEVICE_ID_VIA_82C686,   0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
	{ "vt82c596b",	PCI_DEVICE_ID_VIA_82C596,   0x10, 0x2f, ATA_UDMA4, },
	{ "vt82c596a",	PCI_DEVICE_ID_VIA_82C596,   0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
	{ "vt82c586b",	PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, ATA_UDMA2, VIA_SET_FIFO },
	{ "vt82c586b",	PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, ATA_UDMA2, VIA_SET_FIFO | VIA_BAD_PREQ },
	{ "vt82c586b",	PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, ATA_UDMA2, VIA_SET_FIFO },
	{ "vt82c586a",	PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, ATA_UDMA2, VIA_SET_FIFO },
	{ "vt82c586",	PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f,      0x00, VIA_SET_FIFO },
	{ "vt82c576",	PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f,      0x00, VIA_SET_FIFO | VIA_NO_UNMASK },
	{ "vt82c576",	PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f,      0x00, VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
	{ "vtxxxx",	PCI_DEVICE_ID_VIA_ANON,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ NULL }
};


static const struct dmi_system_id no_atapi_dma_dmi_table[] = {
	{
		.ident = "AVERATEC 3200",
		.matches = {
			DMI_MATCH(DMI_BOARD_VENDOR, "AVERATEC"),
			DMI_MATCH(DMI_BOARD_NAME, "3200"),
                },
        },
	{ }
};


struct via_port {
	
u8 cached_device;
};

/*
 *      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;
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
43
100.00%
2
100.00%
Total
43
100.00%
2
100.00%

/**
 *      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->udma_mask < ATA_UDMA4)
		return ATA_CBL_PATA40;
	/* UDMA 66 chips have only drive side logic */
	else if (config->udma_mask < ATA_UDMA5)
		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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jeff Garzik
61
40.94%
1
14.29%
Alan Cox
55
36.91%
3
42.86%
Tejun Heo
29
19.46%
2
28.57%
Bartlomiej Zolnierkiewicz
4
2.68%
1
14.29%
Total
149
100.00%
7
100.00%



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);
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
Jeff Garzik
99
82.50%
1
20.00%
Tejun Heo
19
15.83%
3
60.00%
Alan Cox
2
1.67%
1
20.00%
Total
120
100.00%
5
100.00%

/**
 *      via_do_set_mode -       set transfer mode data
 *      @ap: ATA interface
 *      @adev: ATA device
 *      @mode: ATA mode being programmed
 *      @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 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 */
	unsigned long T =  1000000000 / via_clock;
	unsigned long UT = T;
	int ut;
	int offset = 3 - (2*ap->port_no) - adev->devno;

	switch (udma_type) {
	case ATA_UDMA4:
		UT = T / 2; break;
	case ATA_UDMA5:
		UT = T / 3; break;
	case ATA_UDMA6:
		UT = T / 4; break;
	}

	/* 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) - 1) << shift;
		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) {
	case ATA_UDMA2:
	default:
		ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 5) - 2)) : 0x03;
		break;
	case ATA_UDMA4:
		ut = t.udma ? (0xe8 | (clamp_val(t.udma, 2, 9) - 2)) : 0x0f;
		break;
	case ATA_UDMA5:
		ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 9) - 2)) : 0x07;
		break;
	case ATA_UDMA6:
		ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 9) - 2)) : 0x07;
		break;
	}

	/* Set UDMA unless device is not UDMA capable */
	if (udma_type) {
		u8 udma_etc;

		pci_read_config_byte(pdev, 0x50 + offset, &udma_etc);

		/* clear transfer mode bit */
		udma_etc &= ~0x20;

		if (t.udma) {
			/* preserve 80-wire cable detection bit */
			udma_etc &= 0x10;
			udma_etc |= ut;
		}

		pci_write_config_byte(pdev, 0x50 + offset, udma_etc);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jeff Garzik
438
82.02%
1
16.67%
Bartlomiej Zolnierkiewicz
69
12.92%
3
50.00%
Laurent Riffard
18
3.37%
1
16.67%
Harvey Harrison
9
1.69%
1
16.67%
Total
534
100.00%
6
100.00%



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;

	via_do_set_mode(ap, adev, adev->pio_mode, set_ast, config->udma_mask);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jeff Garzik
57
95.00%
1
50.00%
Bartlomiej Zolnierkiewicz
3
5.00%
1
50.00%
Total
60
100.00%
2
100.00%



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;

	via_do_set_mode(ap, adev, adev->dma_mode, set_ast, config->udma_mask);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jeff Garzik
57
95.00%
1
50.00%
Bartlomiej Zolnierkiewicz
3
5.00%
1
50.00%
Total
60
100.00%
2
100.00%

/**
 *      via_mode_filter         -       filter buggy device/mode pairs
 *      @dev: ATA device
 *      @mask: Mode bitmask
 *
 *      We need to apply some minimal filtering for old controllers and at least
 *      one breed of Transcend SSD. Return the updated mask.
 */



static unsigned long via_mode_filter(struct ata_device *dev, unsigned long mask)
{
	struct ata_host *host = dev->link->ap->host;
	const struct via_isa_bridge *config = host->private_data;
	unsigned char model_num[ATA_ID_PROD_LEN + 1];

	if (config->id == PCI_DEVICE_ID_VIA_82C586_0) {
		ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
		if (strcmp(model_num, "TS64GSSD25-M") == 0) {
			ata_dev_warn(dev,
	"disabling UDMA mode due to reported lockups with this device\n");
			mask &= ~ ATA_MASK_UDMA;
		}
	}

	if (dev->class == ATA_DEV_ATAPI &&
	    dmi_check_system(no_atapi_dma_dmi_table)) {
		ata_dev_warn(dev, "controller locks up on ATAPI DMA, forcing PIO\n");
		mask &= ATA_MASK_PIO;
	}

	return mask;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
100
78.12%
1
33.33%
Tejun Heo
26
20.31%
1
33.33%
Joe Perches
2
1.56%
1
33.33%
Total
128
100.00%
3
100.00%

/**
 *      via_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_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
{
	struct ata_ioports *ioaddr = &ap->ioaddr;
	struct via_port *vp = ap->private_data;
	unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
	int newctl = 0;

	if (tf->ctl != ap->last_ctl) {
		iowrite8(tf->ctl, ioaddr->ctl_addr);
		ap->last_ctl = tf->ctl;
		ata_wait_idle(ap);
		newctl = 1;
	}

	if (tf->flags & ATA_TFLAG_DEVICE) {
		iowrite8(tf->device, ioaddr->device_addr);
		vp->cached_device = tf->device;
	} else if (newctl)
		iowrite8(vp->cached_device, ioaddr->device_addr);

	if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
		WARN_ON_ONCE(!ioaddr->ctl_addr);
		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);
	}

	ata_wait_idle(ap);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
280
85.11%
1
25.00%
Joseph Chan
37
11.25%
1
25.00%
Tejun Heo
12
3.65%
2
50.00%
Total
329
100.00%
4
100.00%



static int via_port_start(struct ata_port *ap)
{
	struct via_port *vp;
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);

	int ret = ata_bmdma_port_start(ap);
	if (ret < 0)
		return ret;

	vp = devm_kzalloc(&pdev->dev, sizeof(struct via_port), GFP_KERNEL);
	if (vp == NULL)
		return -ENOMEM;
	ap->private_data = vp;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
80
95.24%
1
33.33%
Joseph Chan
3
3.57%
1
33.33%
Tejun Heo
1
1.19%
1
33.33%
Total
84
100.00%
3
100.00%


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_tf_load,
	.port_start	= via_port_start,
	.mode_filter	= via_mode_filter,
};


static struct ata_port_operations via_port_ops_noirq = {
	.inherits	= &via_port_ops,
	.sff_data_xfer	= ata_sff_data_xfer_noirq,
};

/**
 *      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);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
103
98.10%
1
50.00%
Andrew Morton
2
1.90%
1
50.00%
Total
105
100.00%
2
100.00%



static void via_fixup(struct pci_dev *pdev, const struct via_isa_bridge *config)
{
	u32 timing;

	/* Initialise the FIFO for the enabled channels. */
	via_config_fifo(pdev, config->flags);

	if (config->udma_mask == ATA_UDMA4) {
		/* 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);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Bartlomiej Zolnierkiewicz
99
100.00%
1
100.00%
Total
99
100.00%
1
100.00%

/**
 *      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 = ATA_PIO4,
		.mwdma_mask = ATA_MWDMA2,
		.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 = ATA_PIO4,
		.mwdma_mask = ATA_MWDMA2,
		.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 = ATA_PIO4,
		.mwdma_mask = ATA_MWDMA2,
		.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 = ATA_PIO4,
		.mwdma_mask = ATA_MWDMA2,
		.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 = ATA_PIO4,
		.mwdma_mask = ATA_MWDMA2,
		.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 = ATA_PIO4,
		.mwdma_mask = ATA_MWDMA2,
		.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;
	const struct via_isa_bridge *config;
	u8 enable;
	unsigned long flags = id->driver_data;
	int rc;

	ata_print_version_once(&pdev->dev, DRV_VERSION);

	rc = pcim_enable_device(pdev);
	if (rc)
		return rc;

	if (flags & VIA_IDFLAG_SINGLE)
		ppi[1] = &ata_dummy_port_info;

	/* 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 != PCI_DEVICE_ID_VIA_ANON;
	     config++)
		if ((isa = pci_get_device(PCI_VENDOR_ID_VIA +
			!!(config->flags & VIA_BAD_ID),
			config->id, NULL))) {
			u8 rev = isa->revision;
			pci_dev_put(isa);

			if ((id->device == 0x0415 || id->device == 0x3164) &&
			    (config->id != id->device))
				continue;

			if (rev >= config->rev_min && rev <= config->rev_max)
				break;
		}

	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;
	}

	/* Clock set up */
	switch (config->udma_mask) {
	case 0x00:
		if (config->flags & VIA_NO_UNMASK)
			ppi[0] = &via_mwdma_info_borked;
		else
			ppi[0] = &via_mwdma_info;
		break;
	case ATA_UDMA2:
		ppi[0] = &via_udma33_info;
		break;
	case ATA_UDMA4:
		ppi[0] = &via_udma66_info;
		break;
	case ATA_UDMA5:
		ppi[0] = &via_udma100_info;
		break;
	case ATA_UDMA6:
		ppi[0] = &via_udma133_info;
		break;
	default:
		WARN_ON(1);
		return -ENODEV;
 	}

	via_fixup(pdev, config);

	/* We have established the device type, now fire it up */
	return ata_pci_bmdma_init_one(pdev, ppi, &via_sht, (void *)config, 0);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jeff Garzik
377
68.05%
2
11.76%
Tejun Heo
75
13.54%
5
29.41%
Joseph Chan
51
9.21%
2
11.76%
Alan Cox
14
2.53%
2
11.76%
Jiri Slaby
13
2.35%
1
5.88%
Erik Inge Bolsö
12
2.17%
1
5.88%
Bartlomiej Zolnierkiewicz
8
1.44%
2
11.76%
Auke-Jan H Kok
3
0.54%
1
5.88%
Joe Perches
1
0.18%
1
5.88%
Total
554
100.00%
17
100.00%

#ifdef CONFIG_PM_SLEEP
/**
 *      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)
{
	struct ata_host *host = pci_get_drvdata(pdev);
	int rc;

	rc = ata_pci_device_do_resume(pdev);
	if (rc)
		return rc;

	via_fixup(pdev, host->private_data);

	ata_host_resume(host);
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
29
52.73%
1
25.00%
Tejun Heo
22
40.00%
1
25.00%
Bartlomiej Zolnierkiewicz
3
5.45%
1
25.00%
Jingoo Han
1
1.82%
1
25.00%
Total
55
100.00%
4
100.00%

#endif


static const struct pci_device_id via[] = {
	{ PCI_VDEVICE(VIA, 0x0415), },
	{ PCI_VDEVICE(VIA, 0x0571), },
	{ PCI_VDEVICE(VIA, 0x0581), },
	{ PCI_VDEVICE(VIA, 0x1571), },
	{ PCI_VDEVICE(VIA, 0x3164), },
	{ PCI_VDEVICE(VIA, 0x5324), },
	{ PCI_VDEVICE(VIA, 0xC409), VIA_IDFLAG_SINGLE },
	{ PCI_VDEVICE(VIA, 0x9001), VIA_IDFLAG_SINGLE },

	{ },
};


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_SLEEP
	.suspend	= ata_pci_device_suspend,
	.resume		= via_reinit_one,
#endif
};


module_pci_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);
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Jeff Garzik
1581
49.69%
5
7.94%
Alan Cox
795
24.98%
11
17.46%
Tejun Heo
262
8.23%
22
34.92%
Bartlomiej Zolnierkiewicz
261
8.20%
5
7.94%
Joseph Chan
195
6.13%
7
11.11%
Zlatko Calusic
22
0.69%
1
1.59%
Laurent Riffard
18
0.57%
1
1.59%
Jiri Slaby
13
0.41%
1
1.59%
Erik Inge Bolsö
12
0.38%
1
1.59%
Harvey Harrison
9
0.28%
1
1.59%
Auke-Jan H Kok
3
0.09%
1
1.59%
Joe Perches
3
0.09%
2
3.17%
Akira Iguchi
3
0.09%
1
1.59%
Andrew Morton
2
0.06%
1
1.59%
Robert P. J. Day
1
0.03%
1
1.59%
Axel Lin
1
0.03%
1
1.59%
Jingoo Han
1
0.03%
1
1.59%
Total
3182
100.00%
63
100.00%
Directory: drivers/ata

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.