[linux.git] / drivers / ata / pata_sil680.c

/*
 * pata_sil680.c 	- SIL680 PATA for new ATA layer
 *			  (C) 2005 Red Hat Inc
 *			  Alan Cox <[email protected]>
 *
 * based upon
 *
 * linux/drivers/ide/pci/siimage.c		Version 1.07	Nov 30, 2003
 *
 * Copyright (C) 2001-2002	Andre Hedrick <[email protected]>
 * Copyright (C) 2003		Red Hat <[email protected]>
 *
 *  May be copied or modified under the terms of the GNU General Public License
 *
 *  Documentation publically available.
 *
 *	If you have strange problems with nVidia chipset systems please
 *	see the SI support documentation and update your system BIOS
 *	if neccessary
 *
 * TODO
 *	If we know all our devices are LBA28 (or LBA28 sized)  we could use
 *	the command fifo mode.
 */

#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>

#define DRV_NAME "pata_sil680"
#define DRV_VERSION "0.4.1"

/**
 *	sil680_selreg		-	return register base
 *	@hwif: interface
 *	@r: config offset
 *
 *	Turn a config register offset into the right address in either
 *	PCI space or MMIO space to access the control register in question
 *	Thankfully this is a configuration operation so isnt performance
 *	criticial.
 */

static unsigned long sil680_selreg(struct ata_port *ap, int r)
{
	unsigned long base = 0xA0 + r;
	base += (ap->port_no << 4);
	return base;
}

/**
 *	sil680_seldev		-	return register base
 *	@hwif: interface
 *	@r: config offset
 *
 *	Turn a config register offset into the right address in either
 *	PCI space or MMIO space to access the control register in question
 *	including accounting for the unit shift.
 */

static unsigned long sil680_seldev(struct ata_port *ap, struct ata_device *adev, int r)
{
	unsigned long base = 0xA0 + r;
	base += (ap->port_no << 4);
	base |= adev->devno ? 2 : 0;
	return base;
}


/**
 *	sil680_cable_detect	-	cable detection
 *	@ap: ATA port
 *
 *	Perform cable detection. The SIL680 stores this in PCI config
 *	space for us.
 */

static int sil680_cable_detect(struct ata_port *ap) {
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	unsigned long addr = sil680_selreg(ap, 0);
	u8 ata66;
	pci_read_config_byte(pdev, addr, &ata66);
	if (ata66 & 1)
		return ATA_CBL_PATA80;
	else
		return ATA_CBL_PATA40;
}

static int sil680_pre_reset(struct ata_port *ap)
{
	ap->cbl = sil680_cable_detect(ap);
	return ata_std_prereset(ap);
}

/**
 *	sil680_bus_reset	-	reset the SIL680 bus
 *	@ap: ATA port to reset
 *
 *	Perform the SIL680 housekeeping when doing an ATA bus reset
 */

static int sil680_bus_reset(struct ata_port *ap,unsigned int *classes)
{
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	unsigned long addr = sil680_selreg(ap, 0);
	u8 reset;

	pci_read_config_byte(pdev, addr, &reset);
	pci_write_config_byte(pdev, addr, reset | 0x03);
	udelay(25);
	pci_write_config_byte(pdev, addr, reset);
	return ata_std_softreset(ap, classes);
}

static void sil680_error_handler(struct ata_port *ap)
{
	ata_bmdma_drive_eh(ap, sil680_pre_reset, sil680_bus_reset, NULL, ata_std_postreset);
}

/**
 *	sil680_set_piomode	-	set initial PIO mode data
 *	@ap: ATA interface
 *	@adev: ATA device
 *
 *	Program the SIL680 registers for PIO mode. Note that the task speed
 *	registers are shared between the devices so we must pick the lowest
 *	mode for command work.
 */

static void sil680_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
	static u16 speed_p[5] = { 0x328A, 0x2283, 0x1104, 0x10C3, 0x10C1 };
	static u16 speed_t[5] = { 0x328A, 0x2283, 0x1281, 0x10C3, 0x10C1 };

	unsigned long tfaddr = sil680_selreg(ap, 0x02);
	unsigned long addr = sil680_seldev(ap, adev, 0x04);
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	int pio = adev->pio_mode - XFER_PIO_0;
	int lowest_pio = pio;
	u16 reg;

	struct ata_device *pair = ata_dev_pair(adev);

	if (pair != NULL && adev->pio_mode > pair->pio_mode)
		lowest_pio = pair->pio_mode - XFER_PIO_0;

	pci_write_config_word(pdev, addr, speed_p[pio]);
	pci_write_config_word(pdev, tfaddr, speed_t[lowest_pio]);

	pci_read_config_word(pdev, tfaddr-2, &reg);
	reg &= ~0x0200;			/* Clear IORDY */
	if (ata_pio_need_iordy(adev))
		reg |= 0x0200;		/* Enable IORDY */
	pci_write_config_word(pdev, tfaddr-2, reg);
}

/**
 *	sil680_set_dmamode	-	set initial DMA mode data
 *	@ap: ATA interface
 *	@adev: ATA device
 *
 *	Program the MWDMA/UDMA modes for the sil680 k
 *	chipset. The MWDMA mode values are pulled from a lookup table
 *	while the chipset uses mode number for UDMA.
 */

static void sil680_set_dmamode(struct ata_port *ap, struct ata_device *adev)
{
	static u8 ultra_table[2][7] = {
		{ 0x0C, 0x07, 0x05, 0x04, 0x02, 0x01, 0xFF },	/* 100MHz */
		{ 0x0F, 0x0B, 0x07, 0x05, 0x03, 0x02, 0x01 },	/* 133Mhz */
	};
	static u16 dma_table[3] = { 0x2208, 0x10C2, 0x10C1 };

	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	unsigned long ma = sil680_seldev(ap, adev, 0x08);
	unsigned long ua = sil680_seldev(ap, adev, 0x0C);
	unsigned long addr_mask = 0x80 + 4 * ap->port_no;
	int port_shift = adev->devno * 4;
	u8 scsc, mode;
	u16 multi, ultra;

	pci_read_config_byte(pdev, 0x8A, &scsc);
	pci_read_config_byte(pdev, addr_mask, &mode);
	pci_read_config_word(pdev, ma, &multi);
	pci_read_config_word(pdev, ua, &ultra);

	/* Mask timing bits */
	ultra &= ~0x3F;
	mode &= ~(0x03 << port_shift);

	/* Extract scsc */
	scsc = (scsc & 0x30) ? 1: 0;

	if (adev->dma_mode >= XFER_UDMA_0) {
		multi = 0x10C1;
		ultra |= ultra_table[scsc][adev->dma_mode - XFER_UDMA_0];
		mode |= (0x03 << port_shift);
	} else {
		multi = dma_table[adev->dma_mode - XFER_MW_DMA_0];
		mode |= (0x02 << port_shift);
	}
	pci_write_config_byte(pdev, addr_mask, mode);
	pci_write_config_word(pdev, ma, multi);
	pci_write_config_word(pdev, ua, ultra);
}

static struct scsi_host_template sil680_sht = {
	.module			= THIS_MODULE,
	.name			= DRV_NAME,
	.ioctl			= ata_scsi_ioctl,
	.queuecommand		= ata_scsi_queuecmd,
	.can_queue		= ATA_DEF_QUEUE,
	.this_id		= ATA_SHT_THIS_ID,
	.sg_tablesize		= LIBATA_MAX_PRD,
	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
	.emulated		= ATA_SHT_EMULATED,
	.use_clustering		= ATA_SHT_USE_CLUSTERING,
	.proc_name		= DRV_NAME,
	.dma_boundary		= ATA_DMA_BOUNDARY,
	.slave_configure	= ata_scsi_slave_config,
	.slave_destroy		= ata_scsi_slave_destroy,
	.bios_param		= ata_std_bios_param,
};

static struct ata_port_operations sil680_port_ops = {
	.port_disable	= ata_port_disable,
	.set_piomode	= sil680_set_piomode,
	.set_dmamode	= sil680_set_dmamode,
	.mode_filter	= ata_pci_default_filter,
	.tf_load	= ata_tf_load,
	.tf_read	= ata_tf_read,
	.check_status 	= ata_check_status,
	.exec_command	= ata_exec_command,
	.dev_select 	= ata_std_dev_select,

	.freeze		= ata_bmdma_freeze,
	.thaw		= ata_bmdma_thaw,
	.error_handler	= sil680_error_handler,
	.post_internal_cmd = ata_bmdma_post_internal_cmd,

	.bmdma_setup 	= ata_bmdma_setup,
	.bmdma_start 	= ata_bmdma_start,
	.bmdma_stop	= ata_bmdma_stop,
	.bmdma_status 	= ata_bmdma_status,

	.qc_prep 	= ata_qc_prep,
	.qc_issue	= ata_qc_issue_prot,

	.data_xfer	= ata_pio_data_xfer,

	.irq_handler	= ata_interrupt,
	.irq_clear	= ata_bmdma_irq_clear,

	.port_start	= ata_port_start,
	.port_stop	= ata_port_stop,
	.host_stop	= ata_host_stop
};

/**
 *	sil680_init_chip		-	chip setup
 *	@pdev: PCI device
 *
 *	Perform all the chip setup which must be done both when the device
 *	is powered up on boot and when we resume in case we resumed from RAM.
 *	Returns the final clock settings.
 */
 
static u8 sil680_init_chip(struct pci_dev *pdev)
{
	u32 class_rev	= 0;
	u8 tmpbyte	= 0;

        pci_read_config_dword(pdev, PCI_CLASS_REVISION, &class_rev);
        class_rev &= 0xff;
        /* FIXME: double check */
	pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, (class_rev) ? 1 : 255);

	pci_write_config_byte(pdev, 0x80, 0x00);
	pci_write_config_byte(pdev, 0x84, 0x00);

	pci_read_config_byte(pdev, 0x8A, &tmpbyte);

	printk(KERN_INFO "sil680: BA5_EN = %d clock = %02X\n",
			tmpbyte & 1, tmpbyte & 0x30);

	switch(tmpbyte & 0x30) {
		case 0x00:
			/* 133 clock attempt to force it on */
			pci_write_config_byte(pdev, 0x8A, tmpbyte|0x10);
			break;
		case 0x30:
			/* if clocking is disabled */
			/* 133 clock attempt to force it on */
			pci_write_config_byte(pdev, 0x8A, tmpbyte & ~0x20);
			break;
		case 0x10:
			/* 133 already */
			break;
		case 0x20:
			/* BIOS set PCI x2 clocking */
			break;
	}

	pci_read_config_byte(pdev,   0x8A, &tmpbyte);
	printk(KERN_INFO "sil680: BA5_EN = %d clock = %02X\n",
			tmpbyte & 1, tmpbyte & 0x30);

	pci_write_config_byte(pdev,  0xA1, 0x72);
	pci_write_config_word(pdev,  0xA2, 0x328A);
	pci_write_config_dword(pdev, 0xA4, 0x62DD62DD);
	pci_write_config_dword(pdev, 0xA8, 0x43924392);
	pci_write_config_dword(pdev, 0xAC, 0x40094009);
	pci_write_config_byte(pdev,  0xB1, 0x72);
	pci_write_config_word(pdev,  0xB2, 0x328A);
	pci_write_config_dword(pdev, 0xB4, 0x62DD62DD);
	pci_write_config_dword(pdev, 0xB8, 0x43924392);
	pci_write_config_dword(pdev, 0xBC, 0x40094009);

	switch(tmpbyte & 0x30) {
		case 0x00: printk(KERN_INFO "sil680: 100MHz clock.\n");break;
		case 0x10: printk(KERN_INFO "sil680: 133MHz clock.\n");break;
		case 0x20: printk(KERN_INFO "sil680: Using PCI clock.\n");break;
		/* This last case is _NOT_ ok */
		case 0x30: printk(KERN_ERR "sil680: Clock disabled ?\n");
	}
	return tmpbyte & 0x30;
}

static int sil680_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
	static struct ata_port_info info = {
		.sht = &sil680_sht,
		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
		.pio_mask = 0x1f,
		.mwdma_mask = 0x07,
		.udma_mask = 0x7f,
		.port_ops = &sil680_port_ops
	};
	static struct ata_port_info info_slow = {
		.sht = &sil680_sht,
		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
		.pio_mask = 0x1f,
		.mwdma_mask = 0x07,
		.udma_mask = 0x3f,
		.port_ops = &sil680_port_ops
	};
	static struct ata_port_info *port_info[2] = {&info, &info};
	static int printed_version;

	if (!printed_version++)
		dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");

	switch(sil680_init_chip(pdev))
	{
		case 0:
			port_info[0] = port_info[1] = &info_slow;
			break;
		case 0x30:
			return -ENODEV;
	}
	return ata_pci_init_one(pdev, port_info, 2);
}

static int sil680_reinit_one(struct pci_dev *pdev)
{
	sil680_init_chip(pdev);
	return ata_pci_device_resume(pdev);
}

static const struct pci_device_id sil680[] = {
	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_SII_680), },

	{ },
};

static struct pci_driver sil680_pci_driver = {
	.name 		= DRV_NAME,
	.id_table	= sil680,
	.probe 		= sil680_init_one,
	.remove		= ata_pci_remove_one,
	.suspend	= ata_pci_device_suspend,
	.resume		= sil680_reinit_one,
};

static int __init sil680_init(void)
{
	return pci_register_driver(&sil680_pci_driver);
}

static void __exit sil680_exit(void)
{
	pci_unregister_driver(&sil680_pci_driver);
}

MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("low-level driver for SI680 PATA");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, sil680);
MODULE_VERSION(DRV_VERSION);

module_init(sil680_init);
module_exit(sil680_exit);
Commit	Line	Data
669a5db4 JG	1	/*
	2	* pata_sil680.c - SIL680 PATA for new ATA layer
	3	* (C) 2005 Red Hat Inc
	4	* Alan Cox <[email protected]>
	5	*
	6	* based upon
	7	*
	8	* linux/drivers/ide/pci/siimage.c Version 1.07 Nov 30, 2003
	9	*
	10	* Copyright (C) 2001-2002 Andre Hedrick <[email protected]>
	11	* Copyright (C) 2003 Red Hat <[email protected]>
	12	*
	13	* May be copied or modified under the terms of the GNU General Public License
	14	*
	15	* Documentation publically available.
	16	*
	17	* If you have strange problems with nVidia chipset systems please
	18	* see the SI support documentation and update your system BIOS
	19	* if neccessary
	20	*
	21	* TODO
	22	* If we know all our devices are LBA28 (or LBA28 sized) we could use
	23	* the command fifo mode.
	24	*/
	25
	26	#include <linux/kernel.h>
	27	#include <linux/module.h>
	28	#include <linux/pci.h>
	29	#include <linux/init.h>
	30	#include <linux/blkdev.h>
	31	#include <linux/delay.h>
	32	#include <scsi/scsi_host.h>
	33	#include <linux/libata.h>
	34
	35	#define DRV_NAME "pata_sil680"
8550c163	36	#define DRV_VERSION "0.4.1"
669a5db4 JG	37
	38	/**
	39	* sil680_selreg - return register base
	40	* @hwif: interface
	41	* @r: config offset
	42	*
	43	* Turn a config register offset into the right address in either
	44	* PCI space or MMIO space to access the control register in question
	45	* Thankfully this is a configuration operation so isnt performance
	46	* criticial.
	47	*/
	48
	49	static unsigned long sil680_selreg(struct ata_port *ap, int r)
	50	{
	51	unsigned long base = 0xA0 + r;
	52	base += (ap->port_no << 4);
	53	return base;
	54	}
	55
	56	/**
	57	* sil680_seldev - return register base
	58	* @hwif: interface
	59	* @r: config offset
	60	*
	61	* Turn a config register offset into the right address in either
	62	* PCI space or MMIO space to access the control register in question
	63	* including accounting for the unit shift.
	64	*/
	65
	66	static unsigned long sil680_seldev(struct ata_port ap, struct ata_device adev, int r)
	67	{
	68	unsigned long base = 0xA0 + r;
	69	base += (ap->port_no << 4);
	70	base \|= adev->devno ? 2 : 0;
	71	return base;
	72	}
	73
	74
	75	/**
	76	* sil680_cable_detect - cable detection
	77	* @ap: ATA port
	78	*
	79	* Perform cable detection. The SIL680 stores this in PCI config
	80	* space for us.
	81	*/
	82
	83	static int sil680_cable_detect(struct ata_port *ap) {
	84	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	85	unsigned long addr = sil680_selreg(ap, 0);
	86	u8 ata66;
	87	pci_read_config_byte(pdev, addr, &ata66);
	88	if (ata66 & 1)
	89	return ATA_CBL_PATA80;
	90	else
	91	return ATA_CBL_PATA40;
	92	}
	93
	94	static int sil680_pre_reset(struct ata_port *ap)
	95	{
	96	ap->cbl = sil680_cable_detect(ap);
	97	return ata_std_prereset(ap);
	98	}
	99
	100	/**
101	* sil680_bus_reset - reset the SIL680 bus
102	* @ap: ATA port to reset
103	*
104	* Perform the SIL680 housekeeping when doing an ATA bus reset
105	*/
106
107	static int sil680_bus_reset(struct ata_port ap,unsigned int classes)
108	{
109	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
110	unsigned long addr = sil680_selreg(ap, 0);
111	u8 reset;
112
113	pci_read_config_byte(pdev, addr, &reset);
114	pci_write_config_byte(pdev, addr, reset \| 0x03);
115	udelay(25);
116	pci_write_config_byte(pdev, addr, reset);
117	return ata_std_softreset(ap, classes);
118	}
119
120	static void sil680_error_handler(struct ata_port *ap)
121	{
122	ata_bmdma_drive_eh(ap, sil680_pre_reset, sil680_bus_reset, NULL, ata_std_postreset);
123	}
124
125	/**
126	* sil680_set_piomode - set initial PIO mode data
127	* @ap: ATA interface
128	* @adev: ATA device
129	*
130	* Program the SIL680 registers for PIO mode. Note that the task speed
131	* registers are shared between the devices so we must pick the lowest
132	* mode for command work.
133	*/
134
135	static void sil680_set_piomode(struct ata_port ap, struct ata_device adev)
136	{
137	static u16 speed_p[5] = { 0x328A, 0x2283, 0x1104, 0x10C3, 0x10C1 };
5dcade90	138	static u16 speed_t[5] = { 0x328A, 0x2283, 0x1281, 0x10C3, 0x10C1 };
669a5db4 JG	139
	140	unsigned long tfaddr = sil680_selreg(ap, 0x02);
	141	unsigned long addr = sil680_seldev(ap, adev, 0x04);
	142	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	143	int pio = adev->pio_mode - XFER_PIO_0;
	144	int lowest_pio = pio;
	145	u16 reg;
	146
	147	struct ata_device *pair = ata_dev_pair(adev);
	148
	149	if (pair != NULL && adev->pio_mode > pair->pio_mode)
	150	lowest_pio = pair->pio_mode - XFER_PIO_0;
	151
	152	pci_write_config_word(pdev, addr, speed_p[pio]);
	153	pci_write_config_word(pdev, tfaddr, speed_t[lowest_pio]);
	154
	155	pci_read_config_word(pdev, tfaddr-2, &reg);
	156	reg &= ~0x0200; /* Clear IORDY */
	157	if (ata_pio_need_iordy(adev))
	158	reg \|= 0x0200; /* Enable IORDY */
	159	pci_write_config_word(pdev, tfaddr-2, reg);
	160	}
	161
	162	/**
	163	* sil680_set_dmamode - set initial DMA mode data
	164	* @ap: ATA interface
	165	* @adev: ATA device
	166	*
	167	* Program the MWDMA/UDMA modes for the sil680 k
	168	* chipset. The MWDMA mode values are pulled from a lookup table
	169	* while the chipset uses mode number for UDMA.
	170	*/
	171
	172	static void sil680_set_dmamode(struct ata_port ap, struct ata_device adev)
	173	{
	174	static u8 ultra_table[2][7] = {
	175	{ 0x0C, 0x07, 0x05, 0x04, 0x02, 0x01, 0xFF }, /* 100MHz */
	176	{ 0x0F, 0x0B, 0x07, 0x05, 0x03, 0x02, 0x01 }, /* 133Mhz */
	177	};
	178	static u16 dma_table[3] = { 0x2208, 0x10C2, 0x10C1 };
	179
	180	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	181	unsigned long ma = sil680_seldev(ap, adev, 0x08);
	182	unsigned long ua = sil680_seldev(ap, adev, 0x0C);
	183	unsigned long addr_mask = 0x80 + 4 * ap->port_no;
	184	int port_shift = adev->devno * 4;
	185	u8 scsc, mode;
	186	u16 multi, ultra;
	187
	188	pci_read_config_byte(pdev, 0x8A, &scsc);
	189	pci_read_config_byte(pdev, addr_mask, &mode);
	190	pci_read_config_word(pdev, ma, &multi);
	191	pci_read_config_word(pdev, ua, &ultra);
	192
	193	/* Mask timing bits */
	194	ultra &= ~0x3F;
	195	mode &= ~(0x03 << port_shift);
	196
	197	/* Extract scsc */
	198	scsc = (scsc & 0x30) ? 1: 0;
	199
	200	if (adev->dma_mode >= XFER_UDMA_0) {
	201	multi = 0x10C1;
	202	ultra \|= ultra_table[scsc][adev->dma_mode - XFER_UDMA_0];
203	mode \|= (0x03 << port_shift);
204	} else {
205	multi = dma_table[adev->dma_mode - XFER_MW_DMA_0];
206	mode \|= (0x02 << port_shift);
207	}
208	pci_write_config_byte(pdev, addr_mask, mode);
209	pci_write_config_word(pdev, ma, multi);
210	pci_write_config_word(pdev, ua, ultra);
211	}
212
213	static struct scsi_host_template sil680_sht = {
214	.module = THIS_MODULE,
215	.name = DRV_NAME,
216	.ioctl = ata_scsi_ioctl,
217	.queuecommand = ata_scsi_queuecmd,
218	.can_queue = ATA_DEF_QUEUE,
219	.this_id = ATA_SHT_THIS_ID,
220	.sg_tablesize = LIBATA_MAX_PRD,
669a5db4 JG	221	.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
	222	.emulated = ATA_SHT_EMULATED,
	223	.use_clustering = ATA_SHT_USE_CLUSTERING,
	224	.proc_name = DRV_NAME,
	225	.dma_boundary = ATA_DMA_BOUNDARY,
	226	.slave_configure = ata_scsi_slave_config,
afdfe899	227	.slave_destroy = ata_scsi_slave_destroy,
669a5db4 JG	228	.bios_param = ata_std_bios_param,
	229	};
	230
	231	static struct ata_port_operations sil680_port_ops = {
	232	.port_disable = ata_port_disable,
	233	.set_piomode = sil680_set_piomode,
	234	.set_dmamode = sil680_set_dmamode,
	235	.mode_filter = ata_pci_default_filter,
	236	.tf_load = ata_tf_load,
	237	.tf_read = ata_tf_read,
	238	.check_status = ata_check_status,
	239	.exec_command = ata_exec_command,
	240	.dev_select = ata_std_dev_select,
	241
	242	.freeze = ata_bmdma_freeze,
	243	.thaw = ata_bmdma_thaw,
	244	.error_handler = sil680_error_handler,
	245	.post_internal_cmd = ata_bmdma_post_internal_cmd,
	246
	247	.bmdma_setup = ata_bmdma_setup,
	248	.bmdma_start = ata_bmdma_start,
	249	.bmdma_stop = ata_bmdma_stop,
	250	.bmdma_status = ata_bmdma_status,
	251
	252	.qc_prep = ata_qc_prep,
	253	.qc_issue = ata_qc_issue_prot,
bda30288	254
669a5db4 JG	255	.data_xfer = ata_pio_data_xfer,
	256
	257	.irq_handler = ata_interrupt,
	258	.irq_clear = ata_bmdma_irq_clear,
	259
	260	.port_start = ata_port_start,
	261	.port_stop = ata_port_stop,
	262	.host_stop = ata_host_stop
	263	};
	264
8550c163 AC	265	/**
	266	* sil680_init_chip - chip setup
	267	* @pdev: PCI device
	268	*
	269	* Perform all the chip setup which must be done both when the device
	270	* is powered up on boot and when we resume in case we resumed from RAM.
	271	* Returns the final clock settings.
	272	*/
	273
	274	static u8 sil680_init_chip(struct pci_dev *pdev)
669a5db4	275	{
669a5db4 JG	276	u32 class_rev = 0;
	277	u8 tmpbyte = 0;
	278
669a5db4 JG	279	pci_read_config_dword(pdev, PCI_CLASS_REVISION, &class_rev);
	280	class_rev &= 0xff;
	281	/* FIXME: double check */
	282	pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, (class_rev) ? 1 : 255);
	283
	284	pci_write_config_byte(pdev, 0x80, 0x00);
	285	pci_write_config_byte(pdev, 0x84, 0x00);
	286
	287	pci_read_config_byte(pdev, 0x8A, &tmpbyte);
	288
	289	printk(KERN_INFO "sil680: BA5_EN = %d clock = %02X\n",
	290	tmpbyte & 1, tmpbyte & 0x30);
	291
	292	switch(tmpbyte & 0x30) {
	293	case 0x00:
	294	/* 133 clock attempt to force it on */
	295	pci_write_config_byte(pdev, 0x8A, tmpbyte\|0x10);
	296	break;
	297	case 0x30:
	298	/* if clocking is disabled */
	299	/* 133 clock attempt to force it on */
	300	pci_write_config_byte(pdev, 0x8A, tmpbyte & ~0x20);
	301	break;
	302	case 0x10:
	303	/* 133 already */
	304	break;
	305	case 0x20:
	306	/* BIOS set PCI x2 clocking */
	307	break;
	308	}
	309
	310	pci_read_config_byte(pdev, 0x8A, &tmpbyte);
	311	printk(KERN_INFO "sil680: BA5_EN = %d clock = %02X\n",
	312	tmpbyte & 1, tmpbyte & 0x30);
669a5db4 JG	313
	314	pci_write_config_byte(pdev, 0xA1, 0x72);
	315	pci_write_config_word(pdev, 0xA2, 0x328A);
	316	pci_write_config_dword(pdev, 0xA4, 0x62DD62DD);
	317	pci_write_config_dword(pdev, 0xA8, 0x43924392);
	318	pci_write_config_dword(pdev, 0xAC, 0x40094009);
	319	pci_write_config_byte(pdev, 0xB1, 0x72);
	320	pci_write_config_word(pdev, 0xB2, 0x328A);
	321	pci_write_config_dword(pdev, 0xB4, 0x62DD62DD);
	322	pci_write_config_dword(pdev, 0xB8, 0x43924392);
	323	pci_write_config_dword(pdev, 0xBC, 0x40094009);
	324
	325	switch(tmpbyte & 0x30) {
	326	case 0x00: printk(KERN_INFO "sil680: 100MHz clock.\n");break;
	327	case 0x10: printk(KERN_INFO "sil680: 133MHz clock.\n");break;
	328	case 0x20: printk(KERN_INFO "sil680: Using PCI clock.\n");break;
	329	/* This last case is _NOT_ ok */
	330	case 0x30: printk(KERN_ERR "sil680: Clock disabled ?\n");
8550c163 AC	331	}
	332	return tmpbyte & 0x30;
	333	}
	334
	335	static int sil680_init_one(struct pci_dev pdev, const struct pci_device_id id)
	336	{
	337	static struct ata_port_info info = {
	338	.sht = &sil680_sht,
	339	.flags = ATA_FLAG_SLAVE_POSS \| ATA_FLAG_SRST,
	340	.pio_mask = 0x1f,
	341	.mwdma_mask = 0x07,
	342	.udma_mask = 0x7f,
	343	.port_ops = &sil680_port_ops
	344	};
	345	static struct ata_port_info info_slow = {
	346	.sht = &sil680_sht,
	347	.flags = ATA_FLAG_SLAVE_POSS \| ATA_FLAG_SRST,
	348	.pio_mask = 0x1f,
	349	.mwdma_mask = 0x07,
	350	.udma_mask = 0x3f,
	351	.port_ops = &sil680_port_ops
	352	};
	353	static struct ata_port_info *port_info[2] = {&info, &info};
	354	static int printed_version;
	355
	356	if (!printed_version++)
	357	dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
	358
	359	switch(sil680_init_chip(pdev))
	360	{
	361	case 0:
	362	port_info[0] = port_info[1] = &info_slow;
	363	break;
	364	case 0x30:
	365	return -ENODEV;
669a5db4 JG	366	}
	367	return ata_pci_init_one(pdev, port_info, 2);
	368	}
	369
8550c163 AC	370	static int sil680_reinit_one(struct pci_dev *pdev)
	371	{
	372	sil680_init_chip(pdev);
	373	return ata_pci_device_resume(pdev);
	374	}
	375
669a5db4	376	static const struct pci_device_id sil680[] = {
2d2744fc JG	377	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_SII_680), },
	378
	379	{ },
669a5db4 JG	380	};
	381
	382	static struct pci_driver sil680_pci_driver = {
2d2744fc	383	.name = DRV_NAME,
669a5db4 JG	384	.id_table = sil680,
669a5db4 JG	385	.probe = sil680_init_one,
8550c163 AC	386	.remove = ata_pci_remove_one,
	387	.suspend = ata_pci_device_suspend,
	388	.resume = sil680_reinit_one,
669a5db4 JG	389	};
	390
	391	static int __init sil680_init(void)
	392	{
	393	return pci_register_driver(&sil680_pci_driver);
	394	}
	395
669a5db4 JG	396	static void __exit sil680_exit(void)
	397	{
	398	pci_unregister_driver(&sil680_pci_driver);
	399	}
	400
669a5db4 JG	401	MODULE_AUTHOR("Alan Cox");
	402	MODULE_DESCRIPTION("low-level driver for SI680 PATA");
	403	MODULE_LICENSE("GPL");
	404	MODULE_DEVICE_TABLE(pci, sil680);
	405	MODULE_VERSION(DRV_VERSION);
	406
	407	module_init(sil680_init);
	408	module_exit(sil680_exit);