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

/*
 *  linux/drivers/ide/pci/slc90e66.c	Version 0.14	February 8, 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 u8 slc90e66_dma_2_pio (u8 xfer_rate) {
	switch(xfer_rate) {
		case XFER_UDMA_4:
		case XFER_UDMA_3:
		case XFER_UDMA_2:
		case XFER_UDMA_1:
		case XFER_UDMA_0:
		case XFER_MW_DMA_2:
		case XFER_PIO_4:
			return 4;
		case XFER_MW_DMA_1:
		case XFER_PIO_3:
			return 3;
		case XFER_SW_DMA_2:
		case XFER_PIO_2:
			return 2;
		case XFER_MW_DMA_0:
		case XFER_SW_DMA_1:
		case XFER_SW_DMA_0:
		case XFER_PIO_1:
		case XFER_PIO_0:
		case XFER_PIO_SLOW:
		default:
			return 0;
	}
}

static void slc90e66_tune_pio (ide_drive_t *drive, 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(&ide_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(&ide_lock, flags);
}

static void slc90e66_tune_drive (ide_drive_t *drive, u8 pio)
{
	pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
	slc90e66_tune_pio(drive, pio);
	(void) ide_config_drive_speed(drive, XFER_PIO_0 + pio);
}

static int slc90e66_tune_chipset (ide_drive_t *drive, u8 xferspeed)
{
	ide_hwif_t *hwif	= HWIF(drive);
	struct pci_dev *dev	= hwif->pci_dev;
	u8 maslave		= hwif->channel ? 0x42 : 0x40;
	u8 speed		= ide_rate_filter(drive, xferspeed);
	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);

	switch(speed) {
		case XFER_UDMA_4:	u_speed = 4 << (drive->dn * 4); break;
		case XFER_UDMA_3:	u_speed = 3 << (drive->dn * 4); break;
		case XFER_UDMA_2:	u_speed = 2 << (drive->dn * 4); break;
		case XFER_UDMA_1:	u_speed = 1 << (drive->dn * 4); break;
		case XFER_UDMA_0:	u_speed = 0 << (drive->dn * 4); break;
		case XFER_MW_DMA_2:
		case XFER_MW_DMA_1:
		case XFER_SW_DMA_2:	break;
		case XFER_PIO_4:
		case XFER_PIO_3:
		case XFER_PIO_2:
		case XFER_PIO_0:        break;
		default:		return -1;
	}

	if (speed >= XFER_UDMA_0) {
		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 {
		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);
	}

	slc90e66_tune_pio(drive, slc90e66_dma_2_pio(speed));
	return ide_config_drive_speed(drive, speed);
}

static int slc90e66_config_drive_xfer_rate (ide_drive_t *drive)
{
	drive->init_speed = 0;

	if (ide_tune_dma(drive))
		return 0;

	if (ide_use_fast_pio(drive))
		slc90e66_tune_drive(drive, 255);

	return -1;
}

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

	hwif->autodma = 0;

	if (!hwif->irq)
		hwif->irq = hwif->channel ? 15 : 14;

	hwif->speedproc = &slc90e66_tune_chipset;
	hwif->tuneproc	= &slc90e66_tune_drive;

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

	if (!hwif->dma_base) {
		hwif->drives[0].autotune = 1;
		hwif->drives[1].autotune = 1;
		return;
	}

	hwif->atapi_dma = 1;
	hwif->ultra_mask = 0x1f;
	hwif->mwdma_mask = 0x06;
	hwif->swdma_mask = 0x04;

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

	hwif->ide_dma_check = &slc90e66_config_drive_xfer_rate;

	if (!noautodma)
		hwif->autodma = 1;
	hwif->drives[0].autodma = hwif->autodma;
	hwif->drives[1].autodma = hwif->autodma;
}

static ide_pci_device_t slc90e66_chipset __devinitdata = {
	.name		= "SLC90E66",
	.init_hwif	= init_hwif_slc90e66,
	.channels	= 2,
	.autodma	= AUTODMA,
	.enablebits	= {{0x41,0x80,0x80}, {0x43,0x80,0x80}},
	.bootable	= ON_BOARD,
};

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 struct pci_device_id slc90e66_pci_tbl[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_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	/*
07af4276	2	* linux/drivers/ide/pci/slc90e66.c Version 0.14 February 8, 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
1da177e4 LT	24	static u8 slc90e66_dma_2_pio (u8 xfer_rate) {
	25	switch(xfer_rate) {
	26	case XFER_UDMA_4:
	27	case XFER_UDMA_3:
	28	case XFER_UDMA_2:
	29	case XFER_UDMA_1:
	30	case XFER_UDMA_0:
	31	case XFER_MW_DMA_2:
	32	case XFER_PIO_4:
	33	return 4;
	34	case XFER_MW_DMA_1:
	35	case XFER_PIO_3:
	36	return 3;
	37	case XFER_SW_DMA_2:
	38	case XFER_PIO_2:
	39	return 2;
	40	case XFER_MW_DMA_0:
	41	case XFER_SW_DMA_1:
	42	case XFER_SW_DMA_0:
	43	case XFER_PIO_1:
	44	case XFER_PIO_0:
	45	case XFER_PIO_SLOW:
	46	default:
	47	return 0;
	48	}
	49	}
	50
07af4276	51	static void slc90e66_tune_pio (ide_drive_t *drive, u8 pio)
1da177e4 LT	52	{
	53	ide_hwif_t *hwif = HWIF(drive);
	54	struct pci_dev *dev = hwif->pci_dev;
24e6458d	55	int is_slave = drive->dn & 1;
1da177e4 LT	56	int master_port = hwif->channel ? 0x42 : 0x40;
	57	int slave_port = 0x44;
	58	unsigned long flags;
	59	u16 master_data;
	60	u8 slave_data;
24e6458d SS	61	int control = 0;
24e6458d SS	62	/* ISP RTC */
f201f504	63	static const u8 timings[][2]= {
24e6458d SS	64	{ 0, 0 },
	65	{ 0, 0 },
	66	{ 1, 0 },
	67	{ 2, 1 },
	68	{ 2, 3 }, };
1da177e4	69
1da177e4 LT	70	spin_lock_irqsave(&ide_lock, flags);
1da177e4 LT	71	pci_read_config_word(dev, master_port, &master_data);
24e6458d SS	72
	73	if (pio > 1)
	74	control \|= 1; /* Programmable timing on */
	75	if (drive->media == ide_disk)
	76	control \|= 4; /* Prefetch, post write */
	77	if (pio > 2)
	78	control \|= 2; /* IORDY */
1da177e4	79	if (is_slave) {
24e6458d SS	80	master_data \|= 0x4000;
	81	master_data &= ~0x0070;
	82	if (pio > 1) {
07af4276 SS	83	/* Set PPE, IE and TIME */
07af4276 SS	84	master_data \|= control << 4;
24e6458d	85	}
1da177e4	86	pci_read_config_byte(dev, slave_port, &slave_data);
07af4276 SS	87	slave_data &= hwif->channel ? 0x0f : 0xf0;
	88	slave_data \|= ((timings[pio][0] << 2) \| timings[pio][1]) <<
	89	(hwif->channel ? 4 : 0);
1da177e4	90	} else {
24e6458d SS	91	master_data &= ~0x3307;
24e6458d SS	92	if (pio > 1) {
1da177e4	93	/* enable PPE, IE and TIME */
07af4276	94	master_data \|= control;
24e6458d	95	}
07af4276	96	master_data \|= (timings[pio][0] << 12) \| (timings[pio][1] << 8);
1da177e4 LT	97	}
	98	pci_write_config_word(dev, master_port, master_data);
	99	if (is_slave)
	100	pci_write_config_byte(dev, slave_port, slave_data);
	101	spin_unlock_irqrestore(&ide_lock, flags);
	102	}
	103
07af4276 SS	104	static void slc90e66_tune_drive (ide_drive_t *drive, u8 pio)
	105	{
	106	pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
	107	slc90e66_tune_pio(drive, pio);
	108	(void) ide_config_drive_speed(drive, XFER_PIO_0 + pio);
	109	}
	110
1da177e4 LT	111	static int slc90e66_tune_chipset (ide_drive_t *drive, u8 xferspeed)
	112	{
	113	ide_hwif_t *hwif = HWIF(drive);
	114	struct pci_dev *dev = hwif->pci_dev;
	115	u8 maslave = hwif->channel ? 0x42 : 0x40;
2d5eaa6d	116	u8 speed = ide_rate_filter(drive, xferspeed);
1da177e4 LT	117	int sitre = 0, a_speed = 7 << (drive->dn * 4);
	118	int u_speed = 0, u_flag = 1 << drive->dn;
	119	u16 reg4042, reg44, reg48, reg4a;
	120
	121	pci_read_config_word(dev, maslave, &reg4042);
	122	sitre = (reg4042 & 0x4000) ? 1 : 0;
	123	pci_read_config_word(dev, 0x44, &reg44);
	124	pci_read_config_word(dev, 0x48, &reg48);
	125	pci_read_config_word(dev, 0x4a, &reg4a);
	126
	127	switch(speed) {
1da177e4 LT	128	case XFER_UDMA_4: u_speed = 4 << (drive->dn * 4); break;
	129	case XFER_UDMA_3: u_speed = 3 << (drive->dn * 4); break;
	130	case XFER_UDMA_2: u_speed = 2 << (drive->dn * 4); break;
	131	case XFER_UDMA_1: u_speed = 1 << (drive->dn * 4); break;
	132	case XFER_UDMA_0: u_speed = 0 << (drive->dn * 4); break;
	133	case XFER_MW_DMA_2:
	134	case XFER_MW_DMA_1:
	135	case XFER_SW_DMA_2: break;
1da177e4 LT	136	case XFER_PIO_4:
	137	case XFER_PIO_3:
	138	case XFER_PIO_2:
	139	case XFER_PIO_0: break;
	140	default: return -1;
	141	}
	142
	143	if (speed >= XFER_UDMA_0) {
	144	if (!(reg48 & u_flag))
	145	pci_write_config_word(dev, 0x48, reg48\|u_flag);
	146	/* FIXME: (reg4a & a_speed) ? */
	147	if ((reg4a & u_speed) != u_speed) {
	148	pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
	149	pci_read_config_word(dev, 0x4a, &reg4a);
	150	pci_write_config_word(dev, 0x4a, reg4a\|u_speed);
	151	}
	152	} else {
	153	if (reg48 & u_flag)
	154	pci_write_config_word(dev, 0x48, reg48 & ~u_flag);
	155	if (reg4a & a_speed)
	156	pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
	157	}
	158
07af4276 SS	159	slc90e66_tune_pio(drive, slc90e66_dma_2_pio(speed));
07af4276 SS	160	return ide_config_drive_speed(drive, speed);
1da177e4 LT	161	}
1da177e4 LT	162
1da177e4 LT	163	static int slc90e66_config_drive_xfer_rate (ide_drive_t *drive)
1da177e4 LT	164	{
1da177e4 LT	165	drive->init_speed = 0;
1da177e4 LT	166
29e744d0	167	if (ide_tune_dma(drive))
3608b5d7	168	return 0;
1da177e4	169
d8f4469d	170	if (ide_use_fast_pio(drive))
07af4276	171	slc90e66_tune_drive(drive, 255);
d8f4469d	172
3608b5d7	173	return -1;
1da177e4	174	}
1da177e4	175
97319630	176	static void __devinit init_hwif_slc90e66 (ide_hwif_t *hwif)
1da177e4 LT	177	{
	178	u8 reg47 = 0;
	179	u8 mask = hwif->channel ? 0x01 : 0x02; /* bit0:Primary */
	180
	181	hwif->autodma = 0;
	182
	183	if (!hwif->irq)
	184	hwif->irq = hwif->channel ? 15 : 14;
	185
	186	hwif->speedproc = &slc90e66_tune_chipset;
24e6458d	187	hwif->tuneproc = &slc90e66_tune_drive;
1da177e4 LT	188
	189	pci_read_config_byte(hwif->pci_dev, 0x47, &reg47);
	190
	191	if (!hwif->dma_base) {
	192	hwif->drives[0].autotune = 1;
	193	hwif->drives[1].autotune = 1;
	194	return;
	195	}
	196
	197	hwif->atapi_dma = 1;
	198	hwif->ultra_mask = 0x1f;
24e6458d SS	199	hwif->mwdma_mask = 0x06;
24e6458d SS	200	hwif->swdma_mask = 0x04;
1da177e4	201
24e6458d	202	if (!hwif->udma_four) {
1da177e4 LT	203	/* bit[0(1)]: 0:80, 1:40 */
1da177e4 LT	204	hwif->udma_four = (reg47 & mask) ? 0 : 1;
24e6458d	205	}
1da177e4 LT	206
1da177e4 LT	207	hwif->ide_dma_check = &slc90e66_config_drive_xfer_rate;
24e6458d	208
1da177e4 LT	209	if (!noautodma)
	210	hwif->autodma = 1;
	211	hwif->drives[0].autodma = hwif->autodma;
	212	hwif->drives[1].autodma = hwif->autodma;
1da177e4 LT	213	}
	214
	215	static ide_pci_device_t slc90e66_chipset __devinitdata = {
	216	.name = "SLC90E66",
	217	.init_hwif = init_hwif_slc90e66,
	218	.channels = 2,
	219	.autodma = AUTODMA,
	220	.enablebits = {{0x41,0x80,0x80}, {0x43,0x80,0x80}},
	221	.bootable = ON_BOARD,
	222	};
	223
	224	static int __devinit slc90e66_init_one(struct pci_dev dev, const struct pci_device_id id)
	225	{
	226	return ide_setup_pci_device(dev, &slc90e66_chipset);
	227	}
	228
	229	static struct pci_device_id slc90e66_pci_tbl[] = {
f201f504	230	{ PCI_DEVICE(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1), 0},
1da177e4 LT	231	{ 0, },
	232	};
	233	MODULE_DEVICE_TABLE(pci, slc90e66_pci_tbl);
	234
	235	static struct pci_driver driver = {
	236	.name = "SLC90e66_IDE",
	237	.id_table = slc90e66_pci_tbl,
	238	.probe = slc90e66_init_one,
	239	};
	240
82ab1eec	241	static int __init slc90e66_ide_init(void)
1da177e4 LT	242	{
	243	return ide_pci_register_driver(&driver);
	244	}
	245
	246	module_init(slc90e66_ide_init);
	247
	248	MODULE_AUTHOR("Andre Hedrick");
	249	MODULE_DESCRIPTION("PCI driver module for SLC90E66 IDE");
	250	MODULE_LICENSE("GPL");