[deliverable/linux.git] / drivers / ide / pci / slc90e66.c

/*
 *  linux/drivers/ide/pci/slc90e66.c	Version 0.19	Sep 24, 2007
 *
 *  Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
 *  Copyright (C) 2006-2007 MontaVista Software, Inc. <source@mvista.com>
 *
 * This is a look-alike variation of the ICH0 PIIX4 Ultra-66,
 * but this keeps the ISA-Bridge and slots alive.
 *
 */

#include <linux/types.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/delay.h>
#include <linux/init.h>

#include <asm/io.h>

static DEFINE_SPINLOCK(slc90e66_lock);

static void slc90e66_set_pio_mode(ide_drive_t *drive, const u8 pio)
{
	ide_hwif_t *hwif	= HWIF(drive);
	struct pci_dev *dev	= hwif->pci_dev;
	int is_slave		= drive->dn & 1;
	int master_port		= hwif->channel ? 0x42 : 0x40;
	int slave_port		= 0x44;
	unsigned long flags;
	u16 master_data;
	u8 slave_data;
 	int control = 0;
				     /* ISP  RTC */
	static const u8 timings[][2]= {
					{ 0, 0 },
					{ 0, 0 },
					{ 1, 0 },
					{ 2, 1 },
					{ 2, 3 }, };

	spin_lock_irqsave(&slc90e66_lock, flags);
	pci_read_config_word(dev, master_port, &master_data);

	if (pio > 1)
		control |= 1;	/* Programmable timing on */
	if (drive->media == ide_disk)
		control |= 4;	/* Prefetch, post write */
	if (pio > 2)
		control |= 2;	/* IORDY */
	if (is_slave) {
		master_data |=  0x4000;
		master_data &= ~0x0070;
		if (pio > 1) {
			/* Set PPE, IE and TIME */
			master_data |= control << 4;
		}
		pci_read_config_byte(dev, slave_port, &slave_data);
		slave_data &= hwif->channel ? 0x0f : 0xf0;
		slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) <<
			       (hwif->channel ? 4 : 0);
	} else {
		master_data &= ~0x3307;
		if (pio > 1) {
			/* enable PPE, IE and TIME */
			master_data |= control;
		}
		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);
	spin_unlock_irqrestore(&slc90e66_lock, flags);
}

static void slc90e66_set_dma_mode(ide_drive_t *drive, const u8 speed)
{
	ide_hwif_t *hwif	= HWIF(drive);
	struct pci_dev *dev	= hwif->pci_dev;
	u8 maslave		= hwif->channel ? 0x42 : 0x40;
	int sitre = 0, a_speed	= 7 << (drive->dn * 4);
	int u_speed = 0, u_flag = 1 << drive->dn;
	u16			reg4042, reg44, reg48, reg4a;

	pci_read_config_word(dev, maslave, &reg4042);
	sitre = (reg4042 & 0x4000) ? 1 : 0;
	pci_read_config_word(dev, 0x44, &reg44);
	pci_read_config_word(dev, 0x48, &reg48);
	pci_read_config_word(dev, 0x4a, &reg4a);

	if (speed >= XFER_UDMA_0) {
		u_speed = (speed - XFER_UDMA_0) << (drive->dn * 4);

		if (!(reg48 & u_flag))
			pci_write_config_word(dev, 0x48, reg48|u_flag);
		/* FIXME: (reg4a & a_speed) ? */
		if ((reg4a & u_speed) != u_speed) {
			pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
			pci_read_config_word(dev, 0x4a, &reg4a);
			pci_write_config_word(dev, 0x4a, reg4a|u_speed);
		}
	} else {
		const u8 mwdma_to_pio[] = { 0, 3, 4 };
		u8 pio;

		if (reg48 & u_flag)
			pci_write_config_word(dev, 0x48, reg48 & ~u_flag);
		if (reg4a & a_speed)
			pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);

		if (speed >= XFER_MW_DMA_0)
			pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
		else
			pio = 2; /* only SWDMA2 is allowed */

		slc90e66_set_pio_mode(drive, pio);
	}
}

static void __devinit init_hwif_slc90e66 (ide_hwif_t *hwif)
{
	u8 reg47 = 0;
	u8 mask = hwif->channel ? 0x01 : 0x02;  /* bit0:Primary */

	hwif->set_pio_mode = &slc90e66_set_pio_mode;
	hwif->set_dma_mode = &slc90e66_set_dma_mode;

	pci_read_config_byte(hwif->pci_dev, 0x47, &reg47);

	if (hwif->dma_base == 0)
		return;

	if (hwif->cbl != ATA_CBL_PATA40_SHORT)
		/* bit[0(1)]: 0:80, 1:40 */
		hwif->cbl = (reg47 & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
}

static const struct ide_port_info slc90e66_chipset __devinitdata = {
	.name		= "SLC90E66",
	.init_hwif	= init_hwif_slc90e66,
	.enablebits	= {{0x41,0x80,0x80}, {0x43,0x80,0x80}},
	.host_flags	= IDE_HFLAG_LEGACY_IRQS | IDE_HFLAG_BOOTABLE,
	.pio_mask	= ATA_PIO4,
	.swdma_mask	= ATA_SWDMA2_ONLY,
	.mwdma_mask	= ATA_MWDMA12_ONLY,
	.udma_mask	= ATA_UDMA4,
};

static int __devinit slc90e66_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
	return ide_setup_pci_device(dev, &slc90e66_chipset);
}

static const struct pci_device_id slc90e66_pci_tbl[] = {
	{ PCI_VDEVICE(EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1), 0 },
	{ 0, },
};
MODULE_DEVICE_TABLE(pci, slc90e66_pci_tbl);

static struct pci_driver driver = {
	.name		= "SLC90e66_IDE",
	.id_table	= slc90e66_pci_tbl,
	.probe		= slc90e66_init_one,
};

static int __init slc90e66_ide_init(void)
{
	return ide_pci_register_driver(&driver);
}

module_init(slc90e66_ide_init);

MODULE_AUTHOR("Andre Hedrick");
MODULE_DESCRIPTION("PCI driver module for SLC90E66 IDE");
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4	1	/*
a482958b	2	* linux/drivers/ide/pci/slc90e66.c Version 0.19 Sep 24, 2007
1da177e4 LT	3	*
1da177e4 LT	4	* Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
07af4276	5	* Copyright (C) 2006-2007 MontaVista Software, Inc. <source@mvista.com>
1da177e4	6	*
44854add	7	* This is a look-alike variation of the ICH0 PIIX4 Ultra-66,
1da177e4 LT	8	* but this keeps the ISA-Bridge and slots alive.
	9	*
	10	*/
	11
1da177e4 LT	12	#include <linux/types.h>
	13	#include <linux/module.h>
	14	#include <linux/kernel.h>
	15	#include <linux/ioport.h>
	16	#include <linux/pci.h>
	17	#include <linux/hdreg.h>
	18	#include <linux/ide.h>
	19	#include <linux/delay.h>
	20	#include <linux/init.h>
	21
	22	#include <asm/io.h>
	23
a482958b BZ	24	static DEFINE_SPINLOCK(slc90e66_lock);
a482958b BZ	25
88b2b32b	26	static void slc90e66_set_pio_mode(ide_drive_t *drive, const u8 pio)
1da177e4 LT	27	{
	28	ide_hwif_t *hwif = HWIF(drive);
	29	struct pci_dev *dev = hwif->pci_dev;
24e6458d	30	int is_slave = drive->dn & 1;
1da177e4 LT	31	int master_port = hwif->channel ? 0x42 : 0x40;
	32	int slave_port = 0x44;
	33	unsigned long flags;
	34	u16 master_data;
	35	u8 slave_data;
24e6458d SS	36	int control = 0;
24e6458d SS	37	/* ISP RTC */
f201f504	38	static const u8 timings[][2]= {
24e6458d SS	39	{ 0, 0 },
	40	{ 0, 0 },
	41	{ 1, 0 },
	42	{ 2, 1 },
	43	{ 2, 3 }, };
1da177e4	44
a482958b	45	spin_lock_irqsave(&slc90e66_lock, flags);
1da177e4	46	pci_read_config_word(dev, master_port, &master_data);
24e6458d SS	47
	48	if (pio > 1)
	49	control \|= 1; /* Programmable timing on */
	50	if (drive->media == ide_disk)
	51	control \|= 4; /* Prefetch, post write */
	52	if (pio > 2)
	53	control \|= 2; /* IORDY */
1da177e4	54	if (is_slave) {
24e6458d SS	55	master_data \|= 0x4000;
	56	master_data &= ~0x0070;
	57	if (pio > 1) {
07af4276 SS	58	/* Set PPE, IE and TIME */
07af4276 SS	59	master_data \|= control << 4;
24e6458d	60	}
1da177e4	61	pci_read_config_byte(dev, slave_port, &slave_data);
07af4276 SS	62	slave_data &= hwif->channel ? 0x0f : 0xf0;
	63	slave_data \|= ((timings[pio][0] << 2) \| timings[pio][1]) <<
	64	(hwif->channel ? 4 : 0);
1da177e4	65	} else {
24e6458d SS	66	master_data &= ~0x3307;
24e6458d SS	67	if (pio > 1) {
1da177e4	68	/* enable PPE, IE and TIME */
07af4276	69	master_data \|= control;
24e6458d	70	}
07af4276	71	master_data \|= (timings[pio][0] << 12) \| (timings[pio][1] << 8);
1da177e4 LT	72	}
	73	pci_write_config_word(dev, master_port, master_data);
	74	if (is_slave)
	75	pci_write_config_byte(dev, slave_port, slave_data);
a482958b	76	spin_unlock_irqrestore(&slc90e66_lock, flags);
1da177e4 LT	77	}
1da177e4 LT	78
88b2b32b	79	static void slc90e66_set_dma_mode(ide_drive_t *drive, const u8 speed)
1da177e4 LT	80	{
	81	ide_hwif_t *hwif = HWIF(drive);
	82	struct pci_dev *dev = hwif->pci_dev;
	83	u8 maslave = hwif->channel ? 0x42 : 0x40;
1da177e4 LT	84	int sitre = 0, a_speed = 7 << (drive->dn * 4);
	85	int u_speed = 0, u_flag = 1 << drive->dn;
	86	u16 reg4042, reg44, reg48, reg4a;
	87
	88	pci_read_config_word(dev, maslave, &reg4042);
	89	sitre = (reg4042 & 0x4000) ? 1 : 0;
	90	pci_read_config_word(dev, 0x44, &reg44);
	91	pci_read_config_word(dev, 0x48, &reg48);
	92	pci_read_config_word(dev, 0x4a, &reg4a);
	93
1da177e4	94	if (speed >= XFER_UDMA_0) {
4db90a14 BZ	95	u_speed = (speed - XFER_UDMA_0) << (drive->dn * 4);
4db90a14 BZ	96
1da177e4 LT	97	if (!(reg48 & u_flag))
	98	pci_write_config_word(dev, 0x48, reg48\|u_flag);
	99	/* FIXME: (reg4a & a_speed) ? */
	100	if ((reg4a & u_speed) != u_speed) {
	101	pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
	102	pci_read_config_word(dev, 0x4a, &reg4a);
	103	pci_write_config_word(dev, 0x4a, reg4a\|u_speed);
	104	}
	105	} else {
8c91abf8	106	const u8 mwdma_to_pio[] = { 0, 3, 4 };
1c54a93d	107	u8 pio;
8c91abf8	108
1da177e4 LT	109	if (reg48 & u_flag)
	110	pci_write_config_word(dev, 0x48, reg48 & ~u_flag);
	111	if (reg4a & a_speed)
	112	pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
8c91abf8 BZ	113
	114	if (speed >= XFER_MW_DMA_0)
	115	pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
	116	else
	117	pio = 2; /* only SWDMA2 is allowed */
1da177e4	118
1c54a93d BZ	119	slc90e66_set_pio_mode(drive, pio);
1c54a93d BZ	120	}
1da177e4 LT	121	}
1da177e4 LT	122
97319630	123	static void __devinit init_hwif_slc90e66 (ide_hwif_t *hwif)
1da177e4 LT	124	{
	125	u8 reg47 = 0;
	126	u8 mask = hwif->channel ? 0x01 : 0x02; /* bit0:Primary */
	127
26bcb879	128	hwif->set_pio_mode = &slc90e66_set_pio_mode;
88b2b32b	129	hwif->set_dma_mode = &slc90e66_set_dma_mode;
1da177e4 LT	130
	131	pci_read_config_byte(hwif->pci_dev, 0x47, &reg47);
	132
a7b888b2	133	if (hwif->dma_base == 0)
1da177e4	134	return;
1da177e4	135
49521f97	136	if (hwif->cbl != ATA_CBL_PATA40_SHORT)
1da177e4	137	/* bit[0(1)]: 0:80, 1:40 */
49521f97	138	hwif->cbl = (reg47 & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
1da177e4 LT	139	}
1da177e4 LT	140
85620436	141	static const struct ide_port_info slc90e66_chipset __devinitdata = {
1da177e4 LT	142	.name = "SLC90E66",
1da177e4 LT	143	.init_hwif = init_hwif_slc90e66,
1da177e4	144	.enablebits = {{0x41,0x80,0x80}, {0x43,0x80,0x80}},
3985ee3b	145	.host_flags = IDE_HFLAG_LEGACY_IRQS \| IDE_HFLAG_BOOTABLE,
4099d143	146	.pio_mask = ATA_PIO4,
5f8b6c34 BZ	147	.swdma_mask = ATA_SWDMA2_ONLY,
	148	.mwdma_mask = ATA_MWDMA12_ONLY,
	149	.udma_mask = ATA_UDMA4,
1da177e4 LT	150	};
	151
	152	static int __devinit slc90e66_init_one(struct pci_dev dev, const struct pci_device_id id)
	153	{
	154	return ide_setup_pci_device(dev, &slc90e66_chipset);
	155	}
	156
9cbcc5e3 BZ	157	static const struct pci_device_id slc90e66_pci_tbl[] = {
9cbcc5e3 BZ	158	{ PCI_VDEVICE(EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1), 0 },
1da177e4 LT	159	{ 0, },
	160	};
	161	MODULE_DEVICE_TABLE(pci, slc90e66_pci_tbl);
	162
	163	static struct pci_driver driver = {
	164	.name = "SLC90e66_IDE",
	165	.id_table = slc90e66_pci_tbl,
	166	.probe = slc90e66_init_one,
	167	};
	168
82ab1eec	169	static int __init slc90e66_ide_init(void)
1da177e4 LT	170	{
	171	return ide_pci_register_driver(&driver);
	172	}
	173
	174	module_init(slc90e66_ide_init);
	175
	176	MODULE_AUTHOR("Andre Hedrick");
	177	MODULE_DESCRIPTION("PCI driver module for SLC90E66 IDE");
	178	MODULE_LICENSE("GPL");