ata_piix.c

linux 内核源代码

};

static const struct piix_map_db ich8m_apple_map_db = {
	.mask = 0x3,
	.port_enable = 0x1,
	.map = {
		/* PM   PS   SM   SS       MAP */
		{  P0,  NA,  NA,  NA }, /* 00b */
		{  RV,  RV,  RV,  RV },
		{  P0,  P2, IDE, IDE }, /* 10b */
		{  RV,  RV,  RV,  RV },
	},
};

static const struct piix_map_db tolapai_map_db = {
	.mask = 0x3,
	.port_enable = 0x3,
	.map = {
		/* PM   PS   SM   SS       MAP */
		{  P0,  NA,  P1,  NA }, /* 00b */
		{  RV,  RV,  RV,  RV }, /* 01b */
		{  RV,  RV,  RV,  RV }, /* 10b */
		{  RV,  RV,  RV,  RV },
	},
};

static const struct piix_map_db *piix_map_db_table[] = {
	[ich5_sata]		= &ich5_map_db,
	[ich6_sata]		= &ich6_map_db,
	[ich6_sata_ahci]	= &ich6_map_db,
	[ich6m_sata_ahci]	= &ich6m_map_db,
	[ich8_sata_ahci]	= &ich8_map_db,
	[ich8_2port_sata]	= &ich8_2port_map_db,
	[ich8m_apple_sata_ahci]	= &ich8m_apple_map_db,
	[tolapai_sata_ahci]	= &tolapai_map_db,
};

static struct ata_port_info piix_port_info[] = {
	[piix_pata_mwdma] = 	/* PIIX3 MWDMA only */
	{
		.sht		= &piix_sht,
		.flags		= PIIX_PATA_FLAGS,
		.pio_mask	= 0x1f,	/* pio0-4 */
		.mwdma_mask	= 0x06, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
		.port_ops	= &piix_pata_ops,
	},

	[piix_pata_33] =	/* PIIX4 at 33MHz */
	{
		.sht		= &piix_sht,
		.flags		= PIIX_PATA_FLAGS,
		.pio_mask	= 0x1f,	/* pio0-4 */
		.mwdma_mask	= 0x06, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
		.udma_mask	= ATA_UDMA_MASK_40C,
		.port_ops	= &piix_pata_ops,
	},

	[ich_pata_33] = 	/* ICH0 - ICH at 33Mhz*/
	{
		.sht		= &piix_sht,
		.flags		= PIIX_PATA_FLAGS,
		.pio_mask 	= 0x1f,	/* pio 0-4 */
		.mwdma_mask	= 0x06, /* Check: maybe 0x07  */
		.udma_mask	= ATA_UDMA2, /* UDMA33 */
		.port_ops	= &ich_pata_ops,
	},

	[ich_pata_66] = 	/* ICH controllers up to 66MHz */
	{
		.sht		= &piix_sht,
		.flags		= PIIX_PATA_FLAGS,
		.pio_mask 	= 0x1f,	/* pio 0-4 */
		.mwdma_mask	= 0x06, /* MWDMA0 is broken on chip */
		.udma_mask	= ATA_UDMA4,
		.port_ops	= &ich_pata_ops,
	},

	[ich_pata_100] =
	{
		.sht		= &piix_sht,
		.flags		= PIIX_PATA_FLAGS | PIIX_FLAG_CHECKINTR,
		.pio_mask	= 0x1f,	/* pio0-4 */
		.mwdma_mask	= 0x06, /* mwdma1-2 */
		.udma_mask	= ATA_UDMA5, /* udma0-5 */
		.port_ops	= &ich_pata_ops,
	},

	[ich5_sata] =
	{
		.sht		= &piix_sht,
		.flags		= PIIX_SATA_FLAGS,
		.pio_mask	= 0x1f,	/* pio0-4 */
		.mwdma_mask	= 0x07, /* mwdma0-2 */
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &piix_sata_ops,
	},

	[ich6_sata] =
	{
		.sht		= &piix_sht,
		.flags		= PIIX_SATA_FLAGS | PIIX_FLAG_SCR,
		.pio_mask	= 0x1f,	/* pio0-4 */
		.mwdma_mask	= 0x07, /* mwdma0-2 */
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &piix_sata_ops,
	},

	[ich6_sata_ahci] =
	{
		.sht		= &piix_sht,
		.flags		= PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
				  PIIX_FLAG_AHCI,
		.pio_mask	= 0x1f,	/* pio0-4 */
		.mwdma_mask	= 0x07, /* mwdma0-2 */
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &piix_sata_ops,
	},

	[ich6m_sata_ahci] =
	{
		.sht		= &piix_sht,
		.flags		= PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
				  PIIX_FLAG_AHCI,
		.pio_mask	= 0x1f,	/* pio0-4 */
		.mwdma_mask	= 0x07, /* mwdma0-2 */
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &piix_sata_ops,
	},

	[ich8_sata_ahci] =
	{
		.sht		= &piix_sht,
		.flags		= PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
				  PIIX_FLAG_AHCI,
		.pio_mask	= 0x1f,	/* pio0-4 */
		.mwdma_mask	= 0x07, /* mwdma0-2 */
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &piix_sata_ops,
	},

	[ich8_2port_sata] =
	{
		.sht		= &piix_sht,
		.flags		= PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
				  PIIX_FLAG_AHCI,
		.pio_mask	= 0x1f,	/* pio0-4 */
		.mwdma_mask	= 0x07, /* mwdma0-2 */
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &piix_sata_ops,
	},

	[tolapai_sata_ahci] =
	{
		.sht		= &piix_sht,
		.flags		= PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
				  PIIX_FLAG_AHCI,
		.pio_mask	= 0x1f,	/* pio0-4 */
		.mwdma_mask	= 0x07, /* mwdma0-2 */
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &piix_sata_ops,
	},

	[ich8m_apple_sata_ahci] =
	{
		.sht		= &piix_sht,
		.flags		= PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
				  PIIX_FLAG_AHCI,
		.pio_mask	= 0x1f,	/* pio0-4 */
		.mwdma_mask	= 0x07, /* mwdma0-2 */
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &piix_sata_ops,
	},

	[piix_pata_vmw] =
	{
		.sht		= &piix_sht,
		.flags		= PIIX_PATA_FLAGS,
		.pio_mask	= 0x1f,	/* pio0-4 */
		.mwdma_mask	= 0x06, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
		.udma_mask	= ATA_UDMA_MASK_40C,
		.port_ops	= &piix_vmw_ops,
	},

};

static struct pci_bits piix_enable_bits[] = {
	{ 0x41U, 1U, 0x80UL, 0x80UL },	/* port 0 */
	{ 0x43U, 1U, 0x80UL, 0x80UL },	/* port 1 */
};

MODULE_AUTHOR("Andre Hedrick, Alan Cox, Andrzej Krzysztofowicz, Jeff Garzik");
MODULE_DESCRIPTION("SCSI low-level driver for Intel PIIX/ICH ATA controllers");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, piix_pci_tbl);
MODULE_VERSION(DRV_VERSION);

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, 0x0005, 0x0280 },	/* ICH7 on Acer 5602WLMi */
	{ 0x27DF, 0x1025, 0x0102 },	/* ICH7 on Acer 5602aWLMi */
	{ 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, }
};

/**
 *	ich_pata_cable_detect - Probe host controller cable detect info
 *	@ap: Port for which cable detect info is desired
 *
 *	Read 80c cable indicator from ATA PCI device's PCI config
 *	register.  This register is normally set by firmware (BIOS).
 *
 *	LOCKING:
 *	None (inherited from caller).
 */

static int ich_pata_cable_detect(struct ata_port *ap)
{
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	const struct ich_laptop *lap = &ich_laptop[0];
	u8 tmp, mask;

	/* Check for specials - Acer Aspire 5602WLMi */
	while (lap->device) {
		if (lap->device == pdev->device &&
		    lap->subvendor == pdev->subsystem_vendor &&
		    lap->subdevice == pdev->subsystem_device)
			return ATA_CBL_PATA40_SHORT;

		lap++;
	}

	/* check BIOS cable detect results */
	mask = ap->port_no == 0 ? PIIX_80C_PRI : PIIX_80C_SEC;
	pci_read_config_byte(pdev, PIIX_IOCFG, &tmp);
	if ((tmp & mask) == 0)
		return ATA_CBL_PATA40;
	return ATA_CBL_PATA80;
}

/**
 *	piix_pata_prereset - prereset for PATA host controller
 *	@link: Target link
 *	@deadline: deadline jiffies for the operation
 *
 *	LOCKING:
 *	None (inherited from caller).
 */
static int piix_pata_prereset(struct ata_link *link, unsigned long deadline)
{
	struct ata_port *ap = link->ap;
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);

	if (!pci_test_config_bits(pdev, &piix_enable_bits[ap->port_no]))
		return -ENOENT;
	return ata_std_prereset(link, deadline);
}

static void piix_pata_error_handler(struct ata_port *ap)
{
	ata_bmdma_drive_eh(ap, piix_pata_prereset, ata_std_softreset, NULL,
			   ata_std_postreset);
}

/**
 *	piix_set_piomode - Initialize host controller PATA PIO timings
 *	@ap: Port whose timings we are configuring
 *	@adev: um
 *
 *	Set PIO mode for device, in host controller PCI config space.
 *
 *	LOCKING:
 *	None (inherited from caller).
 */

static void piix_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
	unsigned int pio	= adev->pio_mode - XFER_PIO_0;
	struct pci_dev *dev	= to_pci_dev(ap->host->dev);
	unsigned int is_slave	= (adev->devno != 0);
	unsigned int master_port= ap->port_no ? 0x42 : 0x40;
	unsigned int slave_port	= 0x44;
	u16 master_data;
	u8 slave_data;
	u8 udma_enable;
	int control = 0;

	/*
	 *	See Intel Document 298600-004 for the timing programing rules
	 *	for ICH controllers.
	 */

	static const	 /* ISP  RTC */
	u8 timings[][2]	= { { 0, 0 },
			    { 0, 0 },
			    { 1, 0 },
			    { 2, 1 },
			    { 2, 3 }, };

	if (pio >= 2)
		control |= 1;	/* TIME1 enable */
	if (ata_pio_need_iordy(adev))
		control |= 2;	/* IE enable */

	/* Intel specifies that the PPE functionality is for disk only */
	if (adev->class == ATA_DEV_ATA)
		control |= 4;	/* PPE enable */

	/* PIO configuration clears DTE unconditionally.  It will be
	 * programmed in set_dmamode which is guaranteed to be called
	 * after set_piomode if any DMA mode is available.
	 */
	pci_read_config_word(dev, master_port, &master_data);
	if (is_slave) {
		/* clear TIME1|IE1|PPE1|DTE1 */
		master_data &= 0xff0f;
		/* Enable SITRE (seperate slave timing register) */
		master_data |= 0x4000;
		/* enable PPE1, IE1 and TIME1 as needed */
		master_data |= (control << 4);
		pci_read_config_byte(dev, slave_port, &slave_data);
		slave_data &= (ap->port_no ? 0x0f : 0xf0);
		/* Load the timing nibble for this slave */
		slave_data |= ((timings[pio][0] << 2) | timings[pio][1])
						<< (ap->port_no ? 4 : 0);
	} else {
		/* clear ISP|RCT|TIME0|IE0|PPE0|DTE0 */
		master_data &= 0xccf0;
		/* Enable PPE, IE and TIME as appropriate */
		master_data |= control;
		/* load ISP and RCT */
		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);

	/* Ensure the UDMA bit is off - it will be turned back on if
	   UDMA is selected */

	if (ap->udma_mask) {
		pci_read_config_byte(dev, 0x48, &udma_enable);
		udma_enable &= ~(1 << (2 * ap->port_no + adev->devno));
		pci_write_config_byte(dev, 0x48, udma_enable);
	}
}

/**
 *	do_pata_set_dmamode - Initialize host controller PATA PIO timings
 *	@ap: Port whose timings we are configuring
 *	@adev: Drive in question
 *	@udma: udma mode, 0 - 6
 *	@isich: set if the chip is an ICH device
 *
 *	Set UDMA mode for device, in host controller PCI config space.
 *
 *	LOCKING:
 *	None (inherited from caller).
 */

static void do_pata_set_dmamode(struct ata_port *ap, struct ata_device *adev, int isich)
{
	struct pci_dev *dev	= to_pci_dev(ap->host->dev);
	u8 master_port		= ap->port_no ? 0x42 : 0x40;
	u16 master_data;
	u8 speed		= adev->dma_mode;
	int devid		= adev->devno + 2 * ap->port_no;
	u8 udma_enable		= 0;

	static const	 /* ISP  RTC */
	u8 timings[][2]	= { { 0, 0 },
			    { 0, 0 },
			    { 1, 0 },
			    { 2, 1 },
			    { 2, 3 }, };

	pci_read_config_word(dev, master_port, &master_data);
	if (ap->udma_mask)
		pci_read_config_byte(dev, 0x48, &udma_enable);

	if (speed >= XFER_UDMA_0) {
		unsigned int udma = adev->dma_mode - XFER_UDMA_0;
		u16 udma_timing;
		u16 ideconf;
		int u_clock, u_speed;

		/*
		 * UDMA is handled by a combination of clock switching and
		 * selection of dividers
		 *
		 * Handy rule: Odd modes are UDMATIMx 01, even are 02
		 *	       except UDMA0 which is 00
		 */
		u_speed = min(2 - (udma & 1), udma);
		if (udma == 5)
			u_clock = 0x1000;	/* 100Mhz */
		else if (udma > 2)
			u_clock = 1;		/* 66Mhz */
		else
			u_clock = 0;		/* 33Mhz */

		udma_enable |= (1 << devid);

		/* Load the CT/RP selection */
		pci_read_config_word(dev, 0x4A, &udma_timing);
		udma_timing &= ~(3 << (4 * devid));
		udma_timing |= u_speed << (4 * devid);
		pci_write_config_word(dev, 0x4A, udma_timing);

		if (isich) {
			/* Select a 33/66/100Mhz clock */
			pci_read_config_word(dev, 0x54, &ideconf);
			ideconf &= ~(0x1001 << devid);
			ideconf |= u_clock << devid;
			/* For ICH or later we should set bit 10 for better
			   performance (WR_PingPong_En) */
			pci_write_config_word(dev, 0x54, ideconf);
		}
	} else {
		/*
		 * MWDMA is driven by the PIO timings. We must also enable
		 * IORDY unconditionally along with TIME1. PPE has already
		 * been set when the PIO timing was set.
		 */
		unsigned int mwdma	= adev->dma_mode - XFER_MW_DMA_0;
		unsigned int control;
		u8 slave_data;
		const unsigned int needed_pio[3] = {
			XFER_PIO_0, XFER_PIO_3, XFER_PIO_4
		};
		int pio = needed_pio[mwdma] - XFER_PIO_0;

		control = 3;	/* IORDY|TIME1 */

		/* If the drive MWDMA is faster than it can do PIO then
		   we must force PIO into PIO0 */

		if (adev->pio_mode < needed_pio[mwdma])
			/* Enable DMA timing only */
			control |= 8;	/* PIO cycles in PIO0 */

		if (adev->devno) {	/* Slave */
			master_data &= 0xFF4F;  /* Mask out IORDY|TIME1|DMAONLY */
			master_data |= control << 4;
			pci_read_config_byte(dev, 0x44, &slave_data);
			slave_data &= (ap->port_no ? 0x0f : 0xf0);
			/* Load the matching timing */
			slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << (ap->port_no ? 4 : 0);
			pci_write_config_byte(dev, 0x44, slave_data);
		} else { 	/* Master */
			master_data &= 0xCCF4;	/* Mask out IORDY|TIME1|DMAONLY
						   and master timing bits */
			master_data |= control;
			master_data |=
				(timings[pio][0] << 12) |
				(timings[pio][1] << 8);
		}

		if (ap->udma_mask) {
			udma_enable &= ~(1 << devid);
			pci_write_config_word(dev, master_port, master_data);
		}
	}
	/* Don't scribble on 0x48 if the controller does not support UDMA */
	if (ap->udma_mask)
		pci_write_config_byte(dev, 0x48, udma_enable);
}

/**
 *	piix_set_dmamode - Initialize host controller PATA DMA timings
 *	@ap: Port whose timings we are configuring
 *	@adev: um
 *