[mirror_ubuntu-bionic-kernel.git] / drivers / ata / pata_optidma.c

/*
 * pata_optidma.c 	- Opti DMA PATA for new ATA layer
 *			  (C) 2006 Red Hat Inc
 *
 *	The Opti DMA controllers are related to the older PIO PCI controllers
 *	and indeed the VLB ones. The main differences are that the timing
 *	numbers are now based off PCI clocks not VLB and differ, and that
 *	MWDMA is supported.
 *
 *	This driver should support Viper-N+, FireStar, FireStar Plus.
 *
 *	These devices support virtual DMA for read (aka the CS5520). Later
 *	chips support UDMA33, but only if the rest of the board logic does,
 *	so you have to get this right. We don't support the virtual DMA
 *	but we do handle UDMA.
 *
 *	Bits that are worth knowing
 *		Most control registers are shadowed into I/O registers
 *		0x1F5 bit 0 tells you if the PCI/VLB clock is 33 or 25Mhz
 *		Virtual DMA registers *move* between rev 0x02 and rev 0x10
 *		UDMA requires a 66MHz FSB
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>

#define DRV_NAME "pata_optidma"
#define DRV_VERSION "0.3.2"

enum {
	READ_REG	= 0,	/* index of Read cycle timing register */
	WRITE_REG 	= 1,	/* index of Write cycle timing register */
	CNTRL_REG 	= 3,	/* index of Control register */
	STRAP_REG 	= 5,	/* index of Strap register */
	MISC_REG 	= 6	/* index of Miscellaneous register */
};

static int pci_clock;	/* 0 = 33 1 = 25 */

/**
 *	optidma_pre_reset		-	probe begin
 *	@link: ATA link
 *	@deadline: deadline jiffies for the operation
 *
 *	Set up cable type and use generic probe init
 */

static int optidma_pre_reset(struct ata_link *link, unsigned long deadline)
{
	struct ata_port *ap = link->ap;
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	static const struct pci_bits optidma_enable_bits = {
		0x40, 1, 0x08, 0x00
	};

	if (ap->port_no && !pci_test_config_bits(pdev, &optidma_enable_bits))
		return -ENOENT;

	return ata_sff_prereset(link, deadline);
}

/**
 *	optidma_unlock		-	unlock control registers
 *	@ap: ATA port
 *
 *	Unlock the control register block for this adapter. Registers must not
 *	be unlocked in a situation where libata might look at them.
 */

static void optidma_unlock(struct ata_port *ap)
{
	void __iomem *regio = ap->ioaddr.cmd_addr;

	/* These 3 unlock the control register access */
	ioread16(regio + 1);
	ioread16(regio + 1);
	iowrite8(3, regio + 2);
}

/**
 *	optidma_lock		-	issue temporary relock
 *	@ap: ATA port
 *
 *	Re-lock the configuration register settings.
 */

static void optidma_lock(struct ata_port *ap)
{
	void __iomem *regio = ap->ioaddr.cmd_addr;

	/* Relock */
	iowrite8(0x83, regio + 2);
}

/**
 *	optidma_mode_setup	-	set mode data
 *	@ap: ATA interface
 *	@adev: ATA device
 *	@mode: Mode to set
 *
 *	Called to do the DMA or PIO mode setup. Timing numbers are all
 *	pre computed to keep the code clean. There are two tables depending
 *	on the hardware clock speed.
 *
 *	WARNING: While we do this the IDE registers vanish. If we take an
 *	IRQ here we depend on the host set locking to avoid catastrophe.
 */

static void optidma_mode_setup(struct ata_port *ap, struct ata_device *adev, u8 mode)
{
	struct ata_device *pair = ata_dev_pair(adev);
	int pio = adev->pio_mode - XFER_PIO_0;
	int dma = adev->dma_mode - XFER_MW_DMA_0;
	void __iomem *regio = ap->ioaddr.cmd_addr;
	u8 addr;

	/* Address table precomputed with a DCLK of 2 */
	static const u8 addr_timing[2][5] = {
		{ 0x30, 0x20, 0x20, 0x10, 0x10 },
		{ 0x20, 0x20, 0x10, 0x10, 0x10 }
	};
	static const u8 data_rec_timing[2][5] = {
		{ 0x59, 0x46, 0x30, 0x20, 0x20 },
		{ 0x46, 0x32, 0x20, 0x20, 0x10 }
	};
	static const u8 dma_data_rec_timing[2][3] = {
		{ 0x76, 0x20, 0x20 },
		{ 0x54, 0x20, 0x10 }
	};

	/* Switch from IDE to control mode */
	optidma_unlock(ap);


	/*
 	 *	As with many controllers the address setup time is shared
 	 *	and must suit both devices if present. FIXME: Check if we
 	 *	need to look at slowest of PIO/DMA mode of either device
	 */

	if (mode >= XFER_MW_DMA_0)
		addr = 0;
	else
		addr = addr_timing[pci_clock][pio];

	if (pair) {
		u8 pair_addr;
		/* Hardware constraint */
		if (pair->dma_mode)
			pair_addr = 0;
		else
			pair_addr = addr_timing[pci_clock][pair->pio_mode - XFER_PIO_0];
		if (pair_addr > addr)
			addr = pair_addr;
	}

	/* Commence primary programming sequence */
	/* First we load the device number into the timing select */
	iowrite8(adev->devno, regio + MISC_REG);
	/* Now we load the data timings into read data/write data */
	if (mode < XFER_MW_DMA_0) {
		iowrite8(data_rec_timing[pci_clock][pio], regio + READ_REG);
		iowrite8(data_rec_timing[pci_clock][pio], regio + WRITE_REG);
	} else if (mode < XFER_UDMA_0) {
		iowrite8(dma_data_rec_timing[pci_clock][dma], regio + READ_REG);
		iowrite8(dma_data_rec_timing[pci_clock][dma], regio + WRITE_REG);
	}
	/* Finally we load the address setup into the misc register */
	iowrite8(addr | adev->devno, regio + MISC_REG);

	/* Programming sequence complete, timing 0 dev 0, timing 1 dev 1 */
	iowrite8(0x85, regio + CNTRL_REG);

	/* Switch back to IDE mode */
	optidma_lock(ap);

	/* Note: at this point our programming is incomplete. We are
	   not supposed to program PCI 0x43 "things we hacked onto the chip"
	   until we've done both sets of PIO/DMA timings */
}

/**
 *	optiplus_mode_setup	-	DMA setup for Firestar Plus
 *	@ap: ATA port
 *	@adev: device
 *	@mode: desired mode
 *
 *	The Firestar plus has additional UDMA functionality for UDMA0-2 and
 *	requires we do some additional work. Because the base work we must do
 *	is mostly shared we wrap the Firestar setup functionality in this
 *	one
 */

static void optiplus_mode_setup(struct ata_port *ap, struct ata_device *adev, u8 mode)
{
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	u8 udcfg;
	u8 udslave;
	int dev2 = 2 * adev->devno;
	int unit = 2 * ap->port_no + adev->devno;
	int udma = mode - XFER_UDMA_0;

	pci_read_config_byte(pdev, 0x44, &udcfg);
	if (mode <= XFER_UDMA_0) {
		udcfg &= ~(1 << unit);
		optidma_mode_setup(ap, adev, adev->dma_mode);
	} else {
		udcfg |=  (1 << unit);
		if (ap->port_no) {
			pci_read_config_byte(pdev, 0x45, &udslave);
			udslave &= ~(0x03 << dev2);
			udslave |= (udma << dev2);
			pci_write_config_byte(pdev, 0x45, udslave);
		} else {
			udcfg &= ~(0x30 << dev2);
			udcfg |= (udma << dev2);
		}
	}
	pci_write_config_byte(pdev, 0x44, udcfg);
}

/**
 *	optidma_set_pio_mode	-	PIO setup callback
 *	@ap: ATA port
 *	@adev: Device
 *
 *	The libata core provides separate functions for handling PIO and
 *	DMA programming. The architecture of the Firestar makes it easier
 *	for us to have a common function so we provide wrappers
 */

static void optidma_set_pio_mode(struct ata_port *ap, struct ata_device *adev)
{
	optidma_mode_setup(ap, adev, adev->pio_mode);
}

/**
 *	optidma_set_dma_mode	-	DMA setup callback
 *	@ap: ATA port
 *	@adev: Device
 *
 *	The libata core provides separate functions for handling PIO and
 *	DMA programming. The architecture of the Firestar makes it easier
 *	for us to have a common function so we provide wrappers
 */

static void optidma_set_dma_mode(struct ata_port *ap, struct ata_device *adev)
{
	optidma_mode_setup(ap, adev, adev->dma_mode);
}

/**
 *	optiplus_set_pio_mode	-	PIO setup callback
 *	@ap: ATA port
 *	@adev: Device
 *
 *	The libata core provides separate functions for handling PIO and
 *	DMA programming. The architecture of the Firestar makes it easier
 *	for us to have a common function so we provide wrappers
 */

static void optiplus_set_pio_mode(struct ata_port *ap, struct ata_device *adev)
{
	optiplus_mode_setup(ap, adev, adev->pio_mode);
}

/**
 *	optiplus_set_dma_mode	-	DMA setup callback
 *	@ap: ATA port
 *	@adev: Device
 *
 *	The libata core provides separate functions for handling PIO and
 *	DMA programming. The architecture of the Firestar makes it easier
 *	for us to have a common function so we provide wrappers
 */

static void optiplus_set_dma_mode(struct ata_port *ap, struct ata_device *adev)
{
	optiplus_mode_setup(ap, adev, adev->dma_mode);
}

/**
 *	optidma_make_bits	-	PCI setup helper
 *	@adev: ATA device
 *
 *	Turn the ATA device setup into PCI configuration bits
 *	for register 0x43 and return the two bits needed.
 */

static u8 optidma_make_bits43(struct ata_device *adev)
{
	static const u8 bits43[5] = {
		0, 0, 0, 1, 2
	};
	if (!ata_dev_enabled(adev))
		return 0;
	if (adev->dma_mode)
		return adev->dma_mode - XFER_MW_DMA_0;
	return bits43[adev->pio_mode - XFER_PIO_0];
}

/**
 *	optidma_set_mode	-	mode setup
 *	@link: link to set up
 *
 *	Use the standard setup to tune the chipset and then finalise the
 *	configuration by writing the nibble of extra bits of data into
 *	the chip.
 */

static int optidma_set_mode(struct ata_link *link, struct ata_device **r_failed)
{
	struct ata_port *ap = link->ap;
	u8 r;
	int nybble = 4 * ap->port_no;
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	int rc  = ata_do_set_mode(link, r_failed);
	if (rc == 0) {
		pci_read_config_byte(pdev, 0x43, &r);

		r &= (0x0F << nybble);
		r |= (optidma_make_bits43(&link->device[0]) +
		     (optidma_make_bits43(&link->device[0]) << 2)) << nybble;
		pci_write_config_byte(pdev, 0x43, r);
	}
	return rc;
}

static struct scsi_host_template optidma_sht = {
	ATA_BMDMA_SHT(DRV_NAME),
};

static struct ata_port_operations optidma_port_ops = {
	.inherits	= &ata_bmdma_port_ops,
	.cable_detect	= ata_cable_40wire,
	.set_piomode	= optidma_set_pio_mode,
	.set_dmamode	= optidma_set_dma_mode,
	.set_mode	= optidma_set_mode,
	.prereset	= optidma_pre_reset,
};

static struct ata_port_operations optiplus_port_ops = {
	.inherits	= &optidma_port_ops,
	.set_piomode	= optiplus_set_pio_mode,
	.set_dmamode	= optiplus_set_dma_mode,
};

/**
 *	optiplus_with_udma	-	Look for UDMA capable setup
 *	@pdev; ATA controller
 */

static int optiplus_with_udma(struct pci_dev *pdev)
{
	u8 r;
	int ret = 0;
	int ioport = 0x22;
	struct pci_dev *dev1;

	/* Find function 1 */
	dev1 = pci_get_device(0x1045, 0xC701, NULL);
	if (dev1 == NULL)
		return 0;

	/* Rev must be >= 0x10 */
	pci_read_config_byte(dev1, 0x08, &r);
	if (r < 0x10)
		goto done_nomsg;
	/* Read the chipset system configuration to check our mode */
	pci_read_config_byte(dev1, 0x5F, &r);
	ioport |= (r << 8);
	outb(0x10, ioport);
	/* Must be 66Mhz sync */
	if ((inb(ioport + 2) & 1) == 0)
		goto done;

	/* Check the ATA arbitration/timing is suitable */
	pci_read_config_byte(pdev, 0x42, &r);
	if ((r & 0x36) != 0x36)
		goto done;
	pci_read_config_byte(dev1, 0x52, &r);
	if (r & 0x80)	/* IDEDIR disabled */
		ret = 1;
done:
	printk(KERN_WARNING "UDMA not supported in this configuration.\n");
done_nomsg:		/* Wrong chip revision */
	pci_dev_put(dev1);
	return ret;
}

static int optidma_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
	static const struct ata_port_info info_82c700 = {
		.flags = ATA_FLAG_SLAVE_POSS,
		.pio_mask = ATA_PIO4,
		.mwdma_mask = ATA_MWDMA2,
		.port_ops = &optidma_port_ops
	};
	static const struct ata_port_info info_82c700_udma = {
		.flags = ATA_FLAG_SLAVE_POSS,
		.pio_mask = ATA_PIO4,
		.mwdma_mask = ATA_MWDMA2,
		.udma_mask = ATA_UDMA2,
		.port_ops = &optiplus_port_ops
	};
	const struct ata_port_info *ppi[] = { &info_82c700, NULL };
	int rc;

	ata_print_version_once(&dev->dev, DRV_VERSION);

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

	/* Fixed location chipset magic */
	inw(0x1F1);
	inw(0x1F1);
	pci_clock = inb(0x1F5) & 1;		/* 0 = 33Mhz, 1 = 25Mhz */

	if (optiplus_with_udma(dev))
		ppi[0] = &info_82c700_udma;

	return ata_pci_bmdma_init_one(dev, ppi, &optidma_sht, NULL, 0);
}

static const struct pci_device_id optidma[] = {
	{ PCI_VDEVICE(OPTI, 0xD568), },		/* Opti 82C700 */

	{ },
};

static struct pci_driver optidma_pci_driver = {
	.name 		= DRV_NAME,
	.id_table	= optidma,
	.probe 		= optidma_init_one,
	.remove		= ata_pci_remove_one,
#ifdef CONFIG_PM_SLEEP
	.suspend	= ata_pci_device_suspend,
	.resume		= ata_pci_device_resume,
#endif
};

module_pci_driver(optidma_pci_driver);

MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("low-level driver for Opti Firestar/Firestar Plus");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, optidma);
MODULE_VERSION(DRV_VERSION);
Commit	Line	Data
669a5db4 JG	1	/*
	2	* pata_optidma.c - Opti DMA PATA for new ATA layer
	3	* (C) 2006 Red Hat Inc
669a5db4 JG	4	*
	5	* The Opti DMA controllers are related to the older PIO PCI controllers
	6	* and indeed the VLB ones. The main differences are that the timing
	7	* numbers are now based off PCI clocks not VLB and differ, and that
	8	* MWDMA is supported.
	9	*
	10	* This driver should support Viper-N+, FireStar, FireStar Plus.
	11	*
	12	* These devices support virtual DMA for read (aka the CS5520). Later
	13	* chips support UDMA33, but only if the rest of the board logic does,
	14	* so you have to get this right. We don't support the virtual DMA
	15	* but we do handle UDMA.
	16	*
	17	* Bits that are worth knowing
	18	* Most control registers are shadowed into I/O registers
	19	* 0x1F5 bit 0 tells you if the PCI/VLB clock is 33 or 25Mhz
	20	* Virtual DMA registers move between rev 0x02 and rev 0x10
	21	* UDMA requires a 66MHz FSB
	22	*
	23	*/
	24
	25	#include <linux/kernel.h>
	26	#include <linux/module.h>
	27	#include <linux/pci.h>
669a5db4 JG	28	#include <linux/blkdev.h>
	29	#include <linux/delay.h>
	30	#include <scsi/scsi_host.h>
	31	#include <linux/libata.h>
	32
	33	#define DRV_NAME "pata_optidma"
5c25bf0d	34	#define DRV_VERSION "0.3.2"
669a5db4 JG	35
	36	enum {
	37	READ_REG = 0, /* index of Read cycle timing register */
	38	WRITE_REG = 1, /* index of Write cycle timing register */
	39	CNTRL_REG = 3, /* index of Control register */
	40	STRAP_REG = 5, /* index of Strap register */
	41	MISC_REG = 6 /* index of Miscellaneous register */
	42	};
	43
	44	static int pci_clock; /* 0 = 33 1 = 25 */
	45
	46	/**
	47	* optidma_pre_reset - probe begin
cc0680a5	48	* @link: ATA link
d4b2bab4	49	* @deadline: deadline jiffies for the operation
669a5db4 JG	50	*
	51	* Set up cable type and use generic probe init
	52	*/
85cd7251	53
cc0680a5	54	static int optidma_pre_reset(struct ata_link *link, unsigned long deadline)
669a5db4	55	{
cc0680a5	56	struct ata_port *ap = link->ap;
669a5db4	57	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
85cd7251	58	static const struct pci_bits optidma_enable_bits = {
669a5db4 JG	59	0x40, 1, 0x08, 0x00
	60	};
	61
c961922b AC	62	if (ap->port_no && !pci_test_config_bits(pdev, &optidma_enable_bits))
	63	return -ENOENT;
	64
9363c382	65	return ata_sff_prereset(link, deadline);
669a5db4 JG	66	}
669a5db4 JG	67
669a5db4 JG	68	/**
	69	* optidma_unlock - unlock control registers
	70	* @ap: ATA port
	71	*
	72	* Unlock the control register block for this adapter. Registers must not
	73	* be unlocked in a situation where libata might look at them.
	74	*/
85cd7251	75
669a5db4 JG	76	static void optidma_unlock(struct ata_port *ap)
669a5db4 JG	77	{
0d5ff566	78	void __iomem *regio = ap->ioaddr.cmd_addr;
85cd7251	79
669a5db4	80	/* These 3 unlock the control register access */
0d5ff566 TH	81	ioread16(regio + 1);
	82	ioread16(regio + 1);
	83	iowrite8(3, regio + 2);
669a5db4 JG	84	}
	85
	86	/**
	87	* optidma_lock - issue temporary relock
	88	* @ap: ATA port
	89	*
	90	* Re-lock the configuration register settings.
	91	*/
85cd7251	92
669a5db4 JG	93	static void optidma_lock(struct ata_port *ap)
669a5db4 JG	94	{
0d5ff566	95	void __iomem *regio = ap->ioaddr.cmd_addr;
85cd7251	96
669a5db4	97	/* Relock */
0d5ff566	98	iowrite8(0x83, regio + 2);
669a5db4 JG	99	}
	100
	101	/**
5c25bf0d	102	* optidma_mode_setup - set mode data
669a5db4 JG	103	* @ap: ATA interface
	104	* @adev: ATA device
	105	* @mode: Mode to set
	106	*
	107	* Called to do the DMA or PIO mode setup. Timing numbers are all
	108	* pre computed to keep the code clean. There are two tables depending
	109	* on the hardware clock speed.
	110	*
	111	* WARNING: While we do this the IDE registers vanish. If we take an
	112	* IRQ here we depend on the host set locking to avoid catastrophe.
	113	*/
	114
5c25bf0d	115	static void optidma_mode_setup(struct ata_port ap, struct ata_device adev, u8 mode)
669a5db4 JG	116	{
	117	struct ata_device *pair = ata_dev_pair(adev);
	118	int pio = adev->pio_mode - XFER_PIO_0;
	119	int dma = adev->dma_mode - XFER_MW_DMA_0;
0d5ff566	120	void __iomem *regio = ap->ioaddr.cmd_addr;
669a5db4 JG	121	u8 addr;
	122
	123	/* Address table precomputed with a DCLK of 2 */
	124	static const u8 addr_timing[2][5] = {
	125	{ 0x30, 0x20, 0x20, 0x10, 0x10 },
	126	{ 0x20, 0x20, 0x10, 0x10, 0x10 }
	127	};
	128	static const u8 data_rec_timing[2][5] = {
	129	{ 0x59, 0x46, 0x30, 0x20, 0x20 },
	130	{ 0x46, 0x32, 0x20, 0x20, 0x10 }
	131	};
	132	static const u8 dma_data_rec_timing[2][3] = {
	133	{ 0x76, 0x20, 0x20 },
	134	{ 0x54, 0x20, 0x10 }
	135	};
	136
	137	/* Switch from IDE to control mode */
	138	optidma_unlock(ap);
85cd7251	139
669a5db4 JG	140
	141	/*
	142	* As with many controllers the address setup time is shared
	143	* and must suit both devices if present. FIXME: Check if we
	144	* need to look at slowest of PIO/DMA mode of either device
	145	*/
	146
	147	if (mode >= XFER_MW_DMA_0)
	148	addr = 0;
	149	else
	150	addr = addr_timing[pci_clock][pio];
85cd7251	151
669a5db4 JG	152	if (pair) {
	153	u8 pair_addr;
	154	/* Hardware constraint */
	155	if (pair->dma_mode)
	156	pair_addr = 0;
	157	else
	158	pair_addr = addr_timing[pci_clock][pair->pio_mode - XFER_PIO_0];
	159	if (pair_addr > addr)
	160	addr = pair_addr;
	161	}
85cd7251	162
669a5db4 JG	163	/* Commence primary programming sequence */
669a5db4 JG	164	/* First we load the device number into the timing select */
0d5ff566	165	iowrite8(adev->devno, regio + MISC_REG);
669a5db4 JG	166	/* Now we load the data timings into read data/write data */
669a5db4 JG	167	if (mode < XFER_MW_DMA_0) {
0d5ff566 TH	168	iowrite8(data_rec_timing[pci_clock][pio], regio + READ_REG);
0d5ff566 TH	169	iowrite8(data_rec_timing[pci_clock][pio], regio + WRITE_REG);
669a5db4	170	} else if (mode < XFER_UDMA_0) {
0d5ff566 TH	171	iowrite8(dma_data_rec_timing[pci_clock][dma], regio + READ_REG);
0d5ff566 TH	172	iowrite8(dma_data_rec_timing[pci_clock][dma], regio + WRITE_REG);
669a5db4 JG	173	}
669a5db4 JG	174	/* Finally we load the address setup into the misc register */
0d5ff566	175	iowrite8(addr \| adev->devno, regio + MISC_REG);
669a5db4 JG	176
669a5db4 JG	177	/* Programming sequence complete, timing 0 dev 0, timing 1 dev 1 */
0d5ff566	178	iowrite8(0x85, regio + CNTRL_REG);
85cd7251	179
669a5db4 JG	180	/* Switch back to IDE mode */
669a5db4 JG	181	optidma_lock(ap);
85cd7251	182
669a5db4 JG	183	/* Note: at this point our programming is incomplete. We are
	184	not supposed to program PCI 0x43 "things we hacked onto the chip"
	185	until we've done both sets of PIO/DMA timings */
	186	}
	187
	188	/**
5c25bf0d	189	* optiplus_mode_setup - DMA setup for Firestar Plus
669a5db4 JG	190	* @ap: ATA port
	191	* @adev: device
	192	* @mode: desired mode
	193	*
	194	* The Firestar plus has additional UDMA functionality for UDMA0-2 and
	195	* requires we do some additional work. Because the base work we must do
	196	* is mostly shared we wrap the Firestar setup functionality in this
	197	* one
	198	*/
	199
5c25bf0d	200	static void optiplus_mode_setup(struct ata_port ap, struct ata_device adev, u8 mode)
669a5db4 JG	201	{
	202	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	203	u8 udcfg;
	204	u8 udslave;
	205	int dev2 = 2 * adev->devno;
	206	int unit = 2 * ap->port_no + adev->devno;
	207	int udma = mode - XFER_UDMA_0;
85cd7251	208
669a5db4 JG	209	pci_read_config_byte(pdev, 0x44, &udcfg);
	210	if (mode <= XFER_UDMA_0) {
	211	udcfg &= ~(1 << unit);
5c25bf0d	212	optidma_mode_setup(ap, adev, adev->dma_mode);
669a5db4 JG	213	} else {
	214	udcfg \|= (1 << unit);
	215	if (ap->port_no) {
	216	pci_read_config_byte(pdev, 0x45, &udslave);
	217	udslave &= ~(0x03 << dev2);
	218	udslave \|= (udma << dev2);
	219	pci_write_config_byte(pdev, 0x45, udslave);
	220	} else {
	221	udcfg &= ~(0x30 << dev2);
	222	udcfg \|= (udma << dev2);
	223	}
	224	}
	225	pci_write_config_byte(pdev, 0x44, udcfg);
	226	}
	227
	228	/**
	229	* optidma_set_pio_mode - PIO setup callback
	230	* @ap: ATA port
	231	* @adev: Device
	232	*
	233	* The libata core provides separate functions for handling PIO and
	234	* DMA programming. The architecture of the Firestar makes it easier
	235	* for us to have a common function so we provide wrappers
	236	*/
85cd7251	237
669a5db4 JG	238	static void optidma_set_pio_mode(struct ata_port ap, struct ata_device adev)
669a5db4 JG	239	{
5c25bf0d	240	optidma_mode_setup(ap, adev, adev->pio_mode);
669a5db4 JG	241	}
	242
	243	/**
	244	* optidma_set_dma_mode - DMA setup callback
	245	* @ap: ATA port
	246	* @adev: Device
	247	*
	248	* The libata core provides separate functions for handling PIO and
	249	* DMA programming. The architecture of the Firestar makes it easier
	250	* for us to have a common function so we provide wrappers
	251	*/
85cd7251	252
669a5db4 JG	253	static void optidma_set_dma_mode(struct ata_port ap, struct ata_device adev)
669a5db4 JG	254	{
5c25bf0d	255	optidma_mode_setup(ap, adev, adev->dma_mode);
669a5db4 JG	256	}
	257
	258	/**
	259	* optiplus_set_pio_mode - PIO setup callback
	260	* @ap: ATA port
	261	* @adev: Device
	262	*
	263	* The libata core provides separate functions for handling PIO and
	264	* DMA programming. The architecture of the Firestar makes it easier
	265	* for us to have a common function so we provide wrappers
	266	*/
85cd7251	267
669a5db4 JG	268	static void optiplus_set_pio_mode(struct ata_port ap, struct ata_device adev)
669a5db4 JG	269	{
5c25bf0d	270	optiplus_mode_setup(ap, adev, adev->pio_mode);
669a5db4 JG	271	}
	272
	273	/**
	274	* optiplus_set_dma_mode - DMA setup callback
	275	* @ap: ATA port
	276	* @adev: Device
	277	*
	278	* The libata core provides separate functions for handling PIO and
	279	* DMA programming. The architecture of the Firestar makes it easier
	280	* for us to have a common function so we provide wrappers
	281	*/
85cd7251	282
669a5db4 JG	283	static void optiplus_set_dma_mode(struct ata_port ap, struct ata_device adev)
669a5db4 JG	284	{
5c25bf0d	285	optiplus_mode_setup(ap, adev, adev->dma_mode);
669a5db4 JG	286	}
	287
	288	/**
	289	* optidma_make_bits - PCI setup helper
	290	* @adev: ATA device
	291	*
	292	* Turn the ATA device setup into PCI configuration bits
	293	* for register 0x43 and return the two bits needed.
	294	*/
85cd7251	295
669a5db4 JG	296	static u8 optidma_make_bits43(struct ata_device *adev)
	297	{
	298	static const u8 bits43[5] = {
	299	0, 0, 0, 1, 2
	300	};
	301	if (!ata_dev_enabled(adev))
	302	return 0;
	303	if (adev->dma_mode)
	304	return adev->dma_mode - XFER_MW_DMA_0;
	305	return bits43[adev->pio_mode - XFER_PIO_0];
	306	}
	307
	308	/**
5c25bf0d	309	* optidma_set_mode - mode setup
0260731f	310	* @link: link to set up
669a5db4	311	*
5c25bf0d AC	312	* Use the standard setup to tune the chipset and then finalise the
	313	* configuration by writing the nibble of extra bits of data into
	314	* the chip.
669a5db4	315	*/
85cd7251	316
0260731f	317	static int optidma_set_mode(struct ata_link link, struct ata_device *r_failed)
669a5db4	318	{
0260731f	319	struct ata_port *ap = link->ap;
669a5db4 JG	320	u8 r;
	321	int nybble = 4 * ap->port_no;
	322	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
0260731f	323	int rc = ata_do_set_mode(link, r_failed);
5c25bf0d AC	324	if (rc == 0) {
	325	pci_read_config_byte(pdev, 0x43, &r);
	326
	327	r &= (0x0F << nybble);
0260731f TH	328	r \|= (optidma_make_bits43(&link->device[0]) +
0260731f TH	329	(optidma_make_bits43(&link->device[0]) << 2)) << nybble;
5c25bf0d AC	330	pci_write_config_byte(pdev, 0x43, r);
	331	}
	332	return rc;
669a5db4 JG	333	}
	334
	335	static struct scsi_host_template optidma_sht = {
68d1d07b	336	ATA_BMDMA_SHT(DRV_NAME),
669a5db4 JG	337	};
	338
	339	static struct ata_port_operations optidma_port_ops = {
029cfd6b TH	340	.inherits = &ata_bmdma_port_ops,
029cfd6b TH	341	.cable_detect = ata_cable_40wire,
669a5db4 JG	342	.set_piomode = optidma_set_pio_mode,
669a5db4 JG	343	.set_dmamode = optidma_set_dma_mode,
5c25bf0d	344	.set_mode = optidma_set_mode,
a1efdaba	345	.prereset = optidma_pre_reset,
669a5db4 JG	346	};
	347
	348	static struct ata_port_operations optiplus_port_ops = {
029cfd6b	349	.inherits = &optidma_port_ops,
669a5db4 JG	350	.set_piomode = optiplus_set_pio_mode,
669a5db4 JG	351	.set_dmamode = optiplus_set_dma_mode,
669a5db4 JG	352	};
	353
	354	/**
	355	* optiplus_with_udma - Look for UDMA capable setup
	356	* @pdev; ATA controller
	357	*/
85cd7251	358
669a5db4 JG	359	static int optiplus_with_udma(struct pci_dev *pdev)
	360	{
	361	u8 r;
	362	int ret = 0;
	363	int ioport = 0x22;
	364	struct pci_dev *dev1;
85cd7251	365
669a5db4 JG	366	/* Find function 1 */
669a5db4 JG	367	dev1 = pci_get_device(0x1045, 0xC701, NULL);
b447916e	368	if (dev1 == NULL)
669a5db4	369	return 0;
85cd7251	370
669a5db4 JG	371	/* Rev must be >= 0x10 */
	372	pci_read_config_byte(dev1, 0x08, &r);
	373	if (r < 0x10)
	374	goto done_nomsg;
	375	/* Read the chipset system configuration to check our mode */
	376	pci_read_config_byte(dev1, 0x5F, &r);
	377	ioport \|= (r << 8);
	378	outb(0x10, ioport);
	379	/* Must be 66Mhz sync */
	380	if ((inb(ioport + 2) & 1) == 0)
	381	goto done;
	382
	383	/* Check the ATA arbitration/timing is suitable */
	384	pci_read_config_byte(pdev, 0x42, &r);
	385	if ((r & 0x36) != 0x36)
	386	goto done;
	387	pci_read_config_byte(dev1, 0x52, &r);
	388	if (r & 0x80) /* IDEDIR disabled */
	389	ret = 1;
85cd7251	390	done:
669a5db4 JG	391	printk(KERN_WARNING "UDMA not supported in this configuration.\n");
	392	done_nomsg: /* Wrong chip revision */
	393	pci_dev_put(dev1);
	394	return ret;
	395	}
	396
	397	static int optidma_init_one(struct pci_dev dev, const struct pci_device_id id)
	398	{
1626aeb8	399	static const struct ata_port_info info_82c700 = {
1d2808fd	400	.flags = ATA_FLAG_SLAVE_POSS,
14bdef98 EIB	401	.pio_mask = ATA_PIO4,
14bdef98 EIB	402	.mwdma_mask = ATA_MWDMA2,
669a5db4 JG	403	.port_ops = &optidma_port_ops
669a5db4 JG	404	};
1626aeb8	405	static const struct ata_port_info info_82c700_udma = {
1d2808fd	406	.flags = ATA_FLAG_SLAVE_POSS,
14bdef98 EIB	407	.pio_mask = ATA_PIO4,
	408	.mwdma_mask = ATA_MWDMA2,
	409	.udma_mask = ATA_UDMA2,
669a5db4 JG	410	.port_ops = &optiplus_port_ops
669a5db4 JG	411	};
1626aeb8	412	const struct ata_port_info *ppi[] = { &info_82c700, NULL };
f08048e9	413	int rc;
669a5db4	414
06296a1e	415	ata_print_version_once(&dev->dev, DRV_VERSION);
669a5db4	416
f08048e9 TH	417	rc = pcim_enable_device(dev);
	418	if (rc)
	419	return rc;
	420
669a5db4 JG	421	/* Fixed location chipset magic */
	422	inw(0x1F1);
	423	inw(0x1F1);
	424	pci_clock = inb(0x1F5) & 1; /* 0 = 33Mhz, 1 = 25Mhz */
85cd7251	425
669a5db4	426	if (optiplus_with_udma(dev))
1626aeb8	427	ppi[0] = &info_82c700_udma;
669a5db4	428
1c5afdf7	429	return ata_pci_bmdma_init_one(dev, ppi, &optidma_sht, NULL, 0);
669a5db4 JG	430	}
	431
	432	static const struct pci_device_id optidma[] = {
2d2744fc JG	433	{ PCI_VDEVICE(OPTI, 0xD568), }, /* Opti 82C700 */
	434
	435	{ },
669a5db4 JG	436	};
	437
	438	static struct pci_driver optidma_pci_driver = {
2d2744fc	439	.name = DRV_NAME,
669a5db4 JG	440	.id_table = optidma,
669a5db4 JG	441	.probe = optidma_init_one,
30ced0f0	442	.remove = ata_pci_remove_one,
58eb8cd5	443	#ifdef CONFIG_PM_SLEEP
30ced0f0 AC	444	.suspend = ata_pci_device_suspend,
30ced0f0 AC	445	.resume = ata_pci_device_resume,
438ac6d5	446	#endif
669a5db4 JG	447	};
669a5db4 JG	448
2fc75da0	449	module_pci_driver(optidma_pci_driver);
669a5db4	450
669a5db4 JG	451	MODULE_AUTHOR("Alan Cox");
	452	MODULE_DESCRIPTION("low-level driver for Opti Firestar/Firestar Plus");
	453	MODULE_LICENSE("GPL");
	454	MODULE_DEVICE_TABLE(pci, optidma);
	455	MODULE_VERSION(DRV_VERSION);