drivers/ide/cy82c693.c - linux-mtk - Git at Google

 /*
  *  Copyright (C) 1998-2000 Andreas S. Krebs (akrebs@altavista.net), Maintainer
  *  Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>, Integrator
  *
  * CYPRESS CY82C693 chipset IDE controller
  *
  * The CY82C693 chipset is used on Digital's PC-Alpha 164SX boards.
  * Writing the driver was quite simple, since most of the job is
  * done by the generic pci-ide support.
  * The hard part was finding the CY82C693's datasheet on Cypress's
  * web page :-(. But Altavista solved this problem :-).
  *
  *
  * Notes:
  * - I recently got a 16.8G IBM DTTA, so I was able to test it with
  *   a large and fast disk - the results look great, so I'd say the
  *   driver is working fine :-)
  *   hdparm -t reports 8.17 MB/sec at about 6% CPU usage for the DTTA
  * - this is my first linux driver, so there's probably a lot  of room
  *   for optimizations and bug fixing, so feel free to do it.
  * - if using PIO mode it's a good idea to set the PIO mode and
  *   32-bit I/O support (if possible), e.g. hdparm -p2 -c1 /dev/hda
  * - I had some problems with my IBM DHEA with PIO modes < 2
  *   (lost interrupts) ?????
  * - first tests with DMA look okay, they seem to work, but there is a
  *   problem with sound - the BusMaster IDE TimeOut should fixed this
  *
  * Ancient History:
  * AMH@1999-08-24: v0.34 init_cy82c693_chip moved to pci_init_cy82c693
  * ASK@1999-01-23: v0.33 made a few minor code clean ups
  *                       removed DMA clock speed setting by default
  *                       added boot message
  * ASK@1998-11-01: v0.32 added support to set BusMaster IDE TimeOut
  *                       added support to set DMA Controller Clock Speed
  * ASK@1998-10-31: v0.31 fixed problem with setting to high DMA modes
  *                       on some drives.
  * ASK@1998-10-29: v0.3 added support to set DMA modes
  * ASK@1998-10-28: v0.2 added support to set PIO modes
  * ASK@1998-10-27: v0.1 first version - chipset detection
  *
  */

 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/pci.h>
 #include <linux/ide.h>
 #include <linux/init.h>

 #include <asm/io.h>

 #define DRV_NAME "cy82c693"

 /*
  *	The following are used to debug the driver.
  */
 #define CY82C693_DEBUG_INFO	0

 /*
  *	NOTE: the value for busmaster timeout is tricky and I got it by
  *	trial and error!  By using a to low value will cause DMA timeouts
  *	and drop IDE performance, and by using a to high value will cause
  *	audio playback to scatter.
  *	If you know a better value or how to calc it, please let me know.
  */

 /* twice the value written in cy82c693ub datasheet */
 #define BUSMASTER_TIMEOUT	0x50
 /*
  * the value above was tested on my machine and it seems to work okay
  */

 /* here are the offset definitions for the registers */
 #define CY82_IDE_CMDREG		0x04
 #define CY82_IDE_ADDRSETUP	0x48
 #define CY82_IDE_MASTER_IOR	0x4C
 #define CY82_IDE_MASTER_IOW	0x4D
 #define CY82_IDE_SLAVE_IOR	0x4E
 #define CY82_IDE_SLAVE_IOW	0x4F
 #define CY82_IDE_MASTER_8BIT	0x50
 #define CY82_IDE_SLAVE_8BIT	0x51

 #define CY82_INDEX_PORT		0x22
 #define CY82_DATA_PORT		0x23

 #define CY82_INDEX_CHANNEL0	0x30
 #define CY82_INDEX_CHANNEL1	0x31
 #define CY82_INDEX_TIMEOUT	0x32

 /* the min and max PCI bus speed in MHz - from datasheet */
 #define CY82C963_MIN_BUS_SPEED	25
 #define CY82C963_MAX_BUS_SPEED	33

 /* the struct for the PIO mode timings */
 typedef struct pio_clocks_s {
 	u8	address_time;	/* Address setup (clocks) */
 	u8	time_16r;	/* clocks for 16bit IOR (0xF0=Active/data, 0x0F=Recovery) */
 	u8	time_16w;	/* clocks for 16bit IOW (0xF0=Active/data, 0x0F=Recovery) */
 	u8	time_8;		/* clocks for 8bit (0xF0=Active/data, 0x0F=Recovery) */
 } pio_clocks_t;

 /*
  * calc clocks using bus_speed
  * returns (rounded up) time in bus clocks for time in ns
  */
 static int calc_clk(int time, int bus_speed)
 {
 	int clocks;

 	clocks = (time*bus_speed+999)/1000 - 1;

 	if (clocks < 0)
 		clocks = 0;

 	if (clocks > 0x0F)
 		clocks = 0x0F;

 	return clocks;
 }

 /*
  * compute the values for the clock registers for PIO
  * mode and pci_clk [MHz] speed
  *
  * NOTE: for mode 0,1 and 2 drives 8-bit IDE command control registers are used
  *       for mode 3 and 4 drives 8 and 16-bit timings are the same
  *
  */
 static void compute_clocks(u8 pio, pio_clocks_t *p_pclk)
 {
 	struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
 	int clk1, clk2;
 	int bus_speed = ide_pci_clk ? ide_pci_clk : 33;

 	/* we don't check against CY82C693's min and max speed,
 	 * so you can play with the idebus=xx parameter
 	 */

 	/* let's calc the address setup time clocks */
 	p_pclk->address_time = (u8)calc_clk(t->setup, bus_speed);

 	/* let's calc the active and recovery time clocks */
 	clk1 = calc_clk(t->active, bus_speed);

 	/* calc recovery timing */
 	clk2 = t->cycle - t->active - t->setup;

 	clk2 = calc_clk(clk2, bus_speed);

 	clk1 = (clk1<<4)|clk2;	/* combine active and recovery clocks */

 	/* note: we use the same values for 16bit IOR and IOW
 	 *	those are all the same, since I don't have other
 	 *	timings than those from ide-lib.c
 	 */

 	p_pclk->time_16r = (u8)clk1;
 	p_pclk->time_16w = (u8)clk1;

 	/* what are good values for 8bit ?? */
 	p_pclk->time_8 = (u8)clk1;
 }

 /*
  * set DMA mode a specific channel for CY82C693
  */

 static void cy82c693_set_dma_mode(ide_drive_t *drive, const u8 mode)
 {
 	ide_hwif_t *hwif = drive->hwif;
 	u8 single = (mode & 0x10) >> 4, index = 0, data = 0;

 	index = hwif->channel ? CY82_INDEX_CHANNEL1 : CY82_INDEX_CHANNEL0;

 	data = (mode & 3) | (single << 2);

 	outb(index, CY82_INDEX_PORT);
 	outb(data, CY82_DATA_PORT);

 #if CY82C693_DEBUG_INFO
 	printk(KERN_INFO "%s (ch=%d, dev=%d): set DMA mode to %d (single=%d)\n",
 		drive->name, hwif->channel, drive->dn & 1, mode & 3, single);
 #endif /* CY82C693_DEBUG_INFO */

 	/*
 	 * note: below we set the value for Bus Master IDE TimeOut Register
 	 * I'm not absolutly sure what this does, but it solved my problem
 	 * with IDE DMA and sound, so I now can play sound and work with
 	 * my IDE driver at the same time :-)
 	 *
 	 * If you know the correct (best) value for this register please
 	 * let me know - ASK
 	 */

 	data = BUSMASTER_TIMEOUT;
 	outb(CY82_INDEX_TIMEOUT, CY82_INDEX_PORT);
 	outb(data, CY82_DATA_PORT);

 #if CY82C693_DEBUG_INFO
 	printk(KERN_INFO "%s: Set IDE Bus Master TimeOut Register to 0x%X\n",
 		drive->name, data);
 #endif /* CY82C693_DEBUG_INFO */
 }

 static void cy82c693_set_pio_mode(ide_drive_t *drive, const u8 pio)
 {
 	ide_hwif_t *hwif = drive->hwif;
 	struct pci_dev *dev = to_pci_dev(hwif->dev);
 	pio_clocks_t pclk;
 	unsigned int addrCtrl;

 	/* select primary or secondary channel */
 	if (hwif->index > 0) {  /* drive is on the secondary channel */
 		dev = pci_get_slot(dev->bus, dev->devfn+1);
 		if (!dev) {
 			printk(KERN_ERR "%s: tune_drive: "
 				"Cannot find secondary interface!\n",
 				drive->name);
 			return;
 		}
 	}

 	/* let's calc the values for this PIO mode */
 	compute_clocks(pio, &pclk);

 	/* now let's write  the clocks registers */
 	if ((drive->dn & 1) == 0) {
 		/*
 		 * set master drive
 		 * address setup control register
 		 * is 32 bit !!!
 		 */
 		pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);

 		addrCtrl &= (~0xF);
 		addrCtrl |= (unsigned int)pclk.address_time;
 		pci_write_config_dword(dev, CY82_IDE_ADDRSETUP, addrCtrl);

 		/* now let's set the remaining registers */
 		pci_write_config_byte(dev, CY82_IDE_MASTER_IOR, pclk.time_16r);
 		pci_write_config_byte(dev, CY82_IDE_MASTER_IOW, pclk.time_16w);
 		pci_write_config_byte(dev, CY82_IDE_MASTER_8BIT, pclk.time_8);

 		addrCtrl &= 0xF;
 	} else {
 		/*
 		 * set slave drive
 		 * address setup control register
 		 * is 32 bit !!!
 		 */
 		pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);

 		addrCtrl &= (~0xF0);
 		addrCtrl |= ((unsigned int)pclk.address_time<<4);
 		pci_write_config_dword(dev, CY82_IDE_ADDRSETUP, addrCtrl);

 		/* now let's set the remaining registers */
 		pci_write_config_byte(dev, CY82_IDE_SLAVE_IOR, pclk.time_16r);
 		pci_write_config_byte(dev, CY82_IDE_SLAVE_IOW, pclk.time_16w);
 		pci_write_config_byte(dev, CY82_IDE_SLAVE_8BIT, pclk.time_8);

 		addrCtrl >>= 4;
 		addrCtrl &= 0xF;
 	}

 #if CY82C693_DEBUG_INFO
 	printk(KERN_INFO "%s (ch=%d, dev=%d): set PIO timing to "
 		"(addr=0x%X, ior=0x%X, iow=0x%X, 8bit=0x%X)\n",
 		drive->name, hwif->channel, drive->dn & 1,
 		addrCtrl, pclk.time_16r, pclk.time_16w, pclk.time_8);
 #endif /* CY82C693_DEBUG_INFO */
 }

 static void __devinit init_iops_cy82c693(ide_hwif_t *hwif)
 {
 	static ide_hwif_t *primary;
 	struct pci_dev *dev = to_pci_dev(hwif->dev);

 	if (PCI_FUNC(dev->devfn) == 1)
 		primary = hwif;
 	else {
 		hwif->mate = primary;
 		hwif->channel = 1;
 	}
 }

 static const struct ide_port_ops cy82c693_port_ops = {
 	.set_pio_mode		= cy82c693_set_pio_mode,
 	.set_dma_mode		= cy82c693_set_dma_mode,
 };

 static const struct ide_port_info cy82c693_chipset __devinitdata = {
 	.name		= DRV_NAME,
 	.init_iops	= init_iops_cy82c693,
 	.port_ops	= &cy82c693_port_ops,
 	.host_flags	= IDE_HFLAG_SINGLE,
 	.pio_mask	= ATA_PIO4,
 	.swdma_mask	= ATA_SWDMA2,
 	.mwdma_mask	= ATA_MWDMA2,
 };

 static int __devinit cy82c693_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
 	struct pci_dev *dev2;
 	int ret = -ENODEV;

 	/* CY82C693 is more than only a IDE controller.
 	   Function 1 is primary IDE channel, function 2 - secondary. */
 	if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
 	    PCI_FUNC(dev->devfn) == 1) {
 		dev2 = pci_get_slot(dev->bus, dev->devfn + 1);
 		ret = ide_pci_init_two(dev, dev2, &cy82c693_chipset, NULL);
 		if (ret)
 			pci_dev_put(dev2);
 	}
 	return ret;
 }

 static void __devexit cy82c693_remove(struct pci_dev *dev)
 {
 	struct ide_host *host = pci_get_drvdata(dev);
 	struct pci_dev *dev2 = host->dev[1] ? to_pci_dev(host->dev[1]) : NULL;

 	ide_pci_remove(dev);
 	pci_dev_put(dev2);
 }

 static const struct pci_device_id cy82c693_pci_tbl[] = {
 	{ PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), 0 },
 	{ 0, },
 };
 MODULE_DEVICE_TABLE(pci, cy82c693_pci_tbl);

 static struct pci_driver cy82c693_pci_driver = {
 	.name		= "Cypress_IDE",
 	.id_table	= cy82c693_pci_tbl,
 	.probe		= cy82c693_init_one,
 	.remove		= __devexit_p(cy82c693_remove),
 	.suspend	= ide_pci_suspend,
 	.resume		= ide_pci_resume,
 };

 static int __init cy82c693_ide_init(void)
 {
 	return ide_pci_register_driver(&cy82c693_pci_driver);
 }

 static void __exit cy82c693_ide_exit(void)
 {
 	pci_unregister_driver(&cy82c693_pci_driver);
 }

 module_init(cy82c693_ide_init);
 module_exit(cy82c693_ide_exit);

 MODULE_AUTHOR("Andreas Krebs, Andre Hedrick");
 MODULE_DESCRIPTION("PCI driver module for the Cypress CY82C693 IDE");
 MODULE_LICENSE("GPL");
	/*
	* Copyright (C) 1998-2000 Andreas S. Krebs (akrebs@altavista.net), Maintainer
	* Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>, Integrator
	*
	* CYPRESS CY82C693 chipset IDE controller
	*
	* The CY82C693 chipset is used on Digital's PC-Alpha 164SX boards.
	* Writing the driver was quite simple, since most of the job is
	* done by the generic pci-ide support.
	* The hard part was finding the CY82C693's datasheet on Cypress's
	* web page :-(. But Altavista solved this problem :-).
	*
	*
	* Notes:
	* - I recently got a 16.8G IBM DTTA, so I was able to test it with
	* a large and fast disk - the results look great, so I'd say the
	* driver is working fine :-)
	* hdparm -t reports 8.17 MB/sec at about 6% CPU usage for the DTTA
	* - this is my first linux driver, so there's probably a lot of room
	* for optimizations and bug fixing, so feel free to do it.
	* - if using PIO mode it's a good idea to set the PIO mode and
	* 32-bit I/O support (if possible), e.g. hdparm -p2 -c1 /dev/hda
	* - I had some problems with my IBM DHEA with PIO modes < 2
	* (lost interrupts) ?????
	* - first tests with DMA look okay, they seem to work, but there is a
	* problem with sound - the BusMaster IDE TimeOut should fixed this
	*
	* Ancient History:
	* AMH@1999-08-24: v0.34 init_cy82c693_chip moved to pci_init_cy82c693
	* ASK@1999-01-23: v0.33 made a few minor code clean ups
	* removed DMA clock speed setting by default
	* added boot message
	* ASK@1998-11-01: v0.32 added support to set BusMaster IDE TimeOut
	* added support to set DMA Controller Clock Speed
	* ASK@1998-10-31: v0.31 fixed problem with setting to high DMA modes
	* on some drives.
	* ASK@1998-10-29: v0.3 added support to set DMA modes
	* ASK@1998-10-28: v0.2 added support to set PIO modes
	* ASK@1998-10-27: v0.1 first version - chipset detection
	*
	*/

	#include <linux/module.h>
	#include <linux/types.h>
	#include <linux/pci.h>
	#include <linux/ide.h>
	#include <linux/init.h>

	#include <asm/io.h>

	#define DRV_NAME "cy82c693"

	/*
	* The following are used to debug the driver.
	*/
	#define CY82C693_DEBUG_INFO 0

	/*
	* NOTE: the value for busmaster timeout is tricky and I got it by
	* trial and error! By using a to low value will cause DMA timeouts
	* and drop IDE performance, and by using a to high value will cause
	* audio playback to scatter.
	* If you know a better value or how to calc it, please let me know.
	*/

	/* twice the value written in cy82c693ub datasheet */
	#define BUSMASTER_TIMEOUT 0x50
	/*
	* the value above was tested on my machine and it seems to work okay
	*/

	/* here are the offset definitions for the registers */
	#define CY82_IDE_CMDREG 0x04
	#define CY82_IDE_ADDRSETUP 0x48
	#define CY82_IDE_MASTER_IOR 0x4C
	#define CY82_IDE_MASTER_IOW 0x4D
	#define CY82_IDE_SLAVE_IOR 0x4E
	#define CY82_IDE_SLAVE_IOW 0x4F
	#define CY82_IDE_MASTER_8BIT 0x50
	#define CY82_IDE_SLAVE_8BIT 0x51

	#define CY82_INDEX_PORT 0x22
	#define CY82_DATA_PORT 0x23

	#define CY82_INDEX_CHANNEL0 0x30
	#define CY82_INDEX_CHANNEL1 0x31
	#define CY82_INDEX_TIMEOUT 0x32

	/* the min and max PCI bus speed in MHz - from datasheet */
	#define CY82C963_MIN_BUS_SPEED 25
	#define CY82C963_MAX_BUS_SPEED 33

	/* the struct for the PIO mode timings */
	typedef struct pio_clocks_s {
	u8 address_time; /* Address setup (clocks) */
	u8 time_16r; /* clocks for 16bit IOR (0xF0=Active/data, 0x0F=Recovery) */
	u8 time_16w; /* clocks for 16bit IOW (0xF0=Active/data, 0x0F=Recovery) */
	u8 time_8; /* clocks for 8bit (0xF0=Active/data, 0x0F=Recovery) */
	} pio_clocks_t;

	/*
	* calc clocks using bus_speed
	* returns (rounded up) time in bus clocks for time in ns
	*/
	static int calc_clk(int time, int bus_speed)
	{
	int clocks;

	clocks = (time*bus_speed+999)/1000 - 1;

	if (clocks < 0)
	clocks = 0;

	if (clocks > 0x0F)
	clocks = 0x0F;

	return clocks;
	}

	/*
	* compute the values for the clock registers for PIO
	* mode and pci_clk [MHz] speed
	*
	* NOTE: for mode 0,1 and 2 drives 8-bit IDE command control registers are used
	* for mode 3 and 4 drives 8 and 16-bit timings are the same
	*
	*/
	static void compute_clocks(u8 pio, pio_clocks_t *p_pclk)
	{
	struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
	int clk1, clk2;
	int bus_speed = ide_pci_clk ? ide_pci_clk : 33;

	/* we don't check against CY82C693's min and max speed,
	* so you can play with the idebus=xx parameter
	*/

	/* let's calc the address setup time clocks */
	p_pclk->address_time = (u8)calc_clk(t->setup, bus_speed);

	/* let's calc the active and recovery time clocks */
	clk1 = calc_clk(t->active, bus_speed);

	/* calc recovery timing */
	clk2 = t->cycle - t->active - t->setup;

	clk2 = calc_clk(clk2, bus_speed);

	clk1 = (clk1<<4)\|clk2; /* combine active and recovery clocks */

	/* note: we use the same values for 16bit IOR and IOW
	* those are all the same, since I don't have other
	* timings than those from ide-lib.c
	*/

	p_pclk->time_16r = (u8)clk1;
	p_pclk->time_16w = (u8)clk1;

	/* what are good values for 8bit ?? */
	p_pclk->time_8 = (u8)clk1;
	}

	/*
	* set DMA mode a specific channel for CY82C693
	*/

	static void cy82c693_set_dma_mode(ide_drive_t *drive, const u8 mode)
	{
	ide_hwif_t *hwif = drive->hwif;
	u8 single = (mode & 0x10) >> 4, index = 0, data = 0;

	index = hwif->channel ? CY82_INDEX_CHANNEL1 : CY82_INDEX_CHANNEL0;

	data = (mode & 3) \| (single << 2);

	outb(index, CY82_INDEX_PORT);
	outb(data, CY82_DATA_PORT);

	#if CY82C693_DEBUG_INFO
	printk(KERN_INFO "%s (ch=%d, dev=%d): set DMA mode to %d (single=%d)\n",
	drive->name, hwif->channel, drive->dn & 1, mode & 3, single);
	#endif /* CY82C693_DEBUG_INFO */

	/*
	* note: below we set the value for Bus Master IDE TimeOut Register
	* I'm not absolutly sure what this does, but it solved my problem
	* with IDE DMA and sound, so I now can play sound and work with
	* my IDE driver at the same time :-)
	*
	* If you know the correct (best) value for this register please
	* let me know - ASK
	*/

	data = BUSMASTER_TIMEOUT;
	outb(CY82_INDEX_TIMEOUT, CY82_INDEX_PORT);
	outb(data, CY82_DATA_PORT);

	#if CY82C693_DEBUG_INFO
	printk(KERN_INFO "%s: Set IDE Bus Master TimeOut Register to 0x%X\n",
	drive->name, data);
	#endif /* CY82C693_DEBUG_INFO */
	}

	static void cy82c693_set_pio_mode(ide_drive_t *drive, const u8 pio)
	{
	ide_hwif_t *hwif = drive->hwif;
	struct pci_dev *dev = to_pci_dev(hwif->dev);
	pio_clocks_t pclk;
	unsigned int addrCtrl;

	/* select primary or secondary channel */
	if (hwif->index > 0) { /* drive is on the secondary channel */
	dev = pci_get_slot(dev->bus, dev->devfn+1);
	if (!dev) {
	printk(KERN_ERR "%s: tune_drive: "
	"Cannot find secondary interface!\n",
	drive->name);
	return;
	}
	}

	/* let's calc the values for this PIO mode */
	compute_clocks(pio, &pclk);

	/* now let's write the clocks registers */
	if ((drive->dn & 1) == 0) {
	/*
	* set master drive
	* address setup control register
	* is 32 bit !!!
	*/
	pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);

	addrCtrl &= (~0xF);
	addrCtrl \|= (unsigned int)pclk.address_time;
	pci_write_config_dword(dev, CY82_IDE_ADDRSETUP, addrCtrl);

	/* now let's set the remaining registers */
	pci_write_config_byte(dev, CY82_IDE_MASTER_IOR, pclk.time_16r);
	pci_write_config_byte(dev, CY82_IDE_MASTER_IOW, pclk.time_16w);
	pci_write_config_byte(dev, CY82_IDE_MASTER_8BIT, pclk.time_8);

	addrCtrl &= 0xF;
	} else {
	/*
	* set slave drive
	* address setup control register
	* is 32 bit !!!
	*/
	pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);

	addrCtrl &= (~0xF0);
	addrCtrl \|= ((unsigned int)pclk.address_time<<4);
	pci_write_config_dword(dev, CY82_IDE_ADDRSETUP, addrCtrl);

	/* now let's set the remaining registers */
	pci_write_config_byte(dev, CY82_IDE_SLAVE_IOR, pclk.time_16r);
	pci_write_config_byte(dev, CY82_IDE_SLAVE_IOW, pclk.time_16w);
	pci_write_config_byte(dev, CY82_IDE_SLAVE_8BIT, pclk.time_8);

	addrCtrl >>= 4;
	addrCtrl &= 0xF;
	}

	#if CY82C693_DEBUG_INFO
	printk(KERN_INFO "%s (ch=%d, dev=%d): set PIO timing to "
	"(addr=0x%X, ior=0x%X, iow=0x%X, 8bit=0x%X)\n",
	drive->name, hwif->channel, drive->dn & 1,
	addrCtrl, pclk.time_16r, pclk.time_16w, pclk.time_8);
	#endif /* CY82C693_DEBUG_INFO */
	}

	static void __devinit init_iops_cy82c693(ide_hwif_t *hwif)
	{
	static ide_hwif_t *primary;
	struct pci_dev *dev = to_pci_dev(hwif->dev);

	if (PCI_FUNC(dev->devfn) == 1)
	primary = hwif;
	else {
	hwif->mate = primary;
	hwif->channel = 1;
	}
	}

	static const struct ide_port_ops cy82c693_port_ops = {
	.set_pio_mode = cy82c693_set_pio_mode,
	.set_dma_mode = cy82c693_set_dma_mode,
	};

	static const struct ide_port_info cy82c693_chipset __devinitdata = {
	.name = DRV_NAME,
	.init_iops = init_iops_cy82c693,
	.port_ops = &cy82c693_port_ops,
	.host_flags = IDE_HFLAG_SINGLE,
	.pio_mask = ATA_PIO4,
	.swdma_mask = ATA_SWDMA2,
	.mwdma_mask = ATA_MWDMA2,
	};

	static int __devinit cy82c693_init_one(struct pci_dev dev, const struct pci_device_id id)
	{
	struct pci_dev *dev2;
	int ret = -ENODEV;

	/* CY82C693 is more than only a IDE controller.
	Function 1 is primary IDE channel, function 2 - secondary. */
	if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
	PCI_FUNC(dev->devfn) == 1) {
	dev2 = pci_get_slot(dev->bus, dev->devfn + 1);
	ret = ide_pci_init_two(dev, dev2, &cy82c693_chipset, NULL);
	if (ret)
	pci_dev_put(dev2);
	}
	return ret;
	}

	static void __devexit cy82c693_remove(struct pci_dev *dev)
	{
	struct ide_host *host = pci_get_drvdata(dev);
	struct pci_dev *dev2 = host->dev[1] ? to_pci_dev(host->dev[1]) : NULL;

	ide_pci_remove(dev);
	pci_dev_put(dev2);
	}

	static const struct pci_device_id cy82c693_pci_tbl[] = {
	{ PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), 0 },
	{ 0, },
	};
	MODULE_DEVICE_TABLE(pci, cy82c693_pci_tbl);

	static struct pci_driver cy82c693_pci_driver = {
	.name = "Cypress_IDE",
	.id_table = cy82c693_pci_tbl,
	.probe = cy82c693_init_one,
	.remove = __devexit_p(cy82c693_remove),
	.suspend = ide_pci_suspend,
	.resume = ide_pci_resume,
	};

	static int __init cy82c693_ide_init(void)
	{
	return ide_pci_register_driver(&cy82c693_pci_driver);
	}

	static void __exit cy82c693_ide_exit(void)
	{
	pci_unregister_driver(&cy82c693_pci_driver);
	}

	module_init(cy82c693_ide_init);
	module_exit(cy82c693_ide_exit);

	MODULE_AUTHOR("Andreas Krebs, Andre Hedrick");
	MODULE_DESCRIPTION("PCI driver module for the Cypress CY82C693 IDE");
	MODULE_LICENSE("GPL");