[mirror_ubuntu-bionic-kernel.git] / drivers / ide / pci / slc90e66.c

/*
 *  linux/drivers/ide/pci/slc90e66.c	Version 0.13	December 30, 2006
 *
 *  Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
 *  Copyright (C) 2006 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_ratemask (ide_drive_t *drive)
{
	u8 mode	= 2;

	if (!eighty_ninty_three(drive))
		mode = min_t(u8, mode, 1);
	return mode;
}

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;
	}
}

/*
 *  Based on settings done by AMI BIOS
 *  (might be useful if drive is not registered in CMOS for any reason).
 */
static void slc90e66_tune_drive (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 }, };

	pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
	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) {
			/* enable PPE, IE and TIME */
			master_data = master_data | (control << 4);
		}
		pci_read_config_byte(dev, slave_port, &slave_data);
		slave_data = slave_data & (hwif->channel ? 0x0f : 0xf0);
		slave_data = 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 = master_data | control;
		}
		master_data = 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 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(slc90e66_ratemask(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_drive(drive, slc90e66_dma_2_pio(speed));
	return (ide_config_drive_speed(drive, speed));
}

static int slc90e66_config_drive_for_dma (ide_drive_t *drive)
{
	u8 speed = ide_dma_speed(drive, slc90e66_ratemask(drive));

	if (!speed)
		return 0;

	(void) slc90e66_tune_chipset(drive, speed);
	return ide_dma_enable(drive);
}

static int slc90e66_config_drive_xfer_rate (ide_drive_t *drive)
{
	ide_hwif_t *hwif	= HWIF(drive);

	drive->init_speed = 0;

	if (ide_use_dma(drive) && slc90e66_config_drive_for_dma(drive))
		return hwif->ide_dma_on(drive);

	if (ide_use_fast_pio(drive)) {
		(void) hwif->speedproc(drive, XFER_PIO_0 +
				       ide_get_best_pio_mode(drive, 255, 4, NULL));
		return hwif->ide_dma_off_quietly(drive);
	}
	/* IORDY not supported */
	return 0;
}

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	/*
24e6458d	2	* linux/drivers/ide/pci/slc90e66.c Version 0.13 December 30, 2006
1da177e4 LT	3	*
1da177e4 LT	4	* Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
44854add	5	* Copyright (C) 2006 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
	24	static u8 slc90e66_ratemask (ide_drive_t *drive)
	25	{
	26	u8 mode = 2;
	27
	28	if (!eighty_ninty_three(drive))
24e6458d	29	mode = min_t(u8, mode, 1);
1da177e4 LT	30	return mode;
	31	}
	32
	33	static u8 slc90e66_dma_2_pio (u8 xfer_rate) {
	34	switch(xfer_rate) {
	35	case XFER_UDMA_4:
	36	case XFER_UDMA_3:
	37	case XFER_UDMA_2:
	38	case XFER_UDMA_1:
	39	case XFER_UDMA_0:
	40	case XFER_MW_DMA_2:
	41	case XFER_PIO_4:
	42	return 4;
	43	case XFER_MW_DMA_1:
	44	case XFER_PIO_3:
	45	return 3;
	46	case XFER_SW_DMA_2:
	47	case XFER_PIO_2:
	48	return 2;
	49	case XFER_MW_DMA_0:
	50	case XFER_SW_DMA_1:
	51	case XFER_SW_DMA_0:
	52	case XFER_PIO_1:
	53	case XFER_PIO_0:
	54	case XFER_PIO_SLOW:
	55	default:
	56	return 0;
	57	}
	58	}
	59
	60	/*
	61	* Based on settings done by AMI BIOS
	62	* (might be useful if drive is not registered in CMOS for any reason).
	63	*/
	64	static void slc90e66_tune_drive (ide_drive_t *drive, u8 pio)
	65	{
	66	ide_hwif_t *hwif = HWIF(drive);
	67	struct pci_dev *dev = hwif->pci_dev;
24e6458d	68	int is_slave = drive->dn & 1;
1da177e4 LT	69	int master_port = hwif->channel ? 0x42 : 0x40;
	70	int slave_port = 0x44;
	71	unsigned long flags;
	72	u16 master_data;
	73	u8 slave_data;
24e6458d SS	74	int control = 0;
24e6458d SS	75	/* ISP RTC */
f201f504	76	static const u8 timings[][2]= {
24e6458d SS	77	{ 0, 0 },
	78	{ 0, 0 },
	79	{ 1, 0 },
	80	{ 2, 1 },
	81	{ 2, 3 }, };
1da177e4	82
24e6458d	83	pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
1da177e4 LT	84	spin_lock_irqsave(&ide_lock, flags);
1da177e4 LT	85	pci_read_config_word(dev, master_port, &master_data);
24e6458d SS	86
	87	if (pio > 1)
	88	control \|= 1; /* Programmable timing on */
	89	if (drive->media == ide_disk)
	90	control \|= 4; /* Prefetch, post write */
	91	if (pio > 2)
	92	control \|= 2; /* IORDY */
1da177e4	93	if (is_slave) {
24e6458d SS	94	master_data \|= 0x4000;
	95	master_data &= ~0x0070;
	96	if (pio > 1) {
1da177e4	97	/* enable PPE, IE and TIME */
24e6458d SS	98	master_data = master_data \| (control << 4);
24e6458d SS	99	}
1da177e4 LT	100	pci_read_config_byte(dev, slave_port, &slave_data);
	101	slave_data = slave_data & (hwif->channel ? 0x0f : 0xf0);
	102	slave_data = slave_data \| (((timings[pio][0] << 2) \| timings[pio][1]) << (hwif->channel ? 4 : 0));
	103	} else {
24e6458d SS	104	master_data &= ~0x3307;
24e6458d SS	105	if (pio > 1) {
1da177e4	106	/* enable PPE, IE and TIME */
24e6458d SS	107	master_data = master_data \| control;
24e6458d SS	108	}
1da177e4 LT	109	master_data = master_data \| (timings[pio][0] << 12) \| (timings[pio][1] << 8);
	110	}
	111	pci_write_config_word(dev, master_port, master_data);
	112	if (is_slave)
	113	pci_write_config_byte(dev, slave_port, slave_data);
	114	spin_unlock_irqrestore(&ide_lock, flags);
	115	}
	116
	117	static int slc90e66_tune_chipset (ide_drive_t *drive, u8 xferspeed)
	118	{
	119	ide_hwif_t *hwif = HWIF(drive);
	120	struct pci_dev *dev = hwif->pci_dev;
	121	u8 maslave = hwif->channel ? 0x42 : 0x40;
	122	u8 speed = ide_rate_filter(slc90e66_ratemask(drive), xferspeed);
	123	int sitre = 0, a_speed = 7 << (drive->dn * 4);
	124	int u_speed = 0, u_flag = 1 << drive->dn;
	125	u16 reg4042, reg44, reg48, reg4a;
	126
	127	pci_read_config_word(dev, maslave, &reg4042);
	128	sitre = (reg4042 & 0x4000) ? 1 : 0;
	129	pci_read_config_word(dev, 0x44, &reg44);
	130	pci_read_config_word(dev, 0x48, &reg48);
	131	pci_read_config_word(dev, 0x4a, &reg4a);
	132
	133	switch(speed) {
1da177e4 LT	134	case XFER_UDMA_4: u_speed = 4 << (drive->dn * 4); break;
	135	case XFER_UDMA_3: u_speed = 3 << (drive->dn * 4); break;
	136	case XFER_UDMA_2: u_speed = 2 << (drive->dn * 4); break;
	137	case XFER_UDMA_1: u_speed = 1 << (drive->dn * 4); break;
	138	case XFER_UDMA_0: u_speed = 0 << (drive->dn * 4); break;
	139	case XFER_MW_DMA_2:
	140	case XFER_MW_DMA_1:
	141	case XFER_SW_DMA_2: break;
1da177e4 LT	142	case XFER_PIO_4:
	143	case XFER_PIO_3:
	144	case XFER_PIO_2:
	145	case XFER_PIO_0: break;
	146	default: return -1;
	147	}
	148
	149	if (speed >= XFER_UDMA_0) {
	150	if (!(reg48 & u_flag))
	151	pci_write_config_word(dev, 0x48, reg48\|u_flag);
	152	/* FIXME: (reg4a & a_speed) ? */
	153	if ((reg4a & u_speed) != u_speed) {
	154	pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
	155	pci_read_config_word(dev, 0x4a, &reg4a);
	156	pci_write_config_word(dev, 0x4a, reg4a\|u_speed);
	157	}
	158	} else {
	159	if (reg48 & u_flag)
	160	pci_write_config_word(dev, 0x48, reg48 & ~u_flag);
	161	if (reg4a & a_speed)
	162	pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
	163	}
	164
	165	slc90e66_tune_drive(drive, slc90e66_dma_2_pio(speed));
	166	return (ide_config_drive_speed(drive, speed));
	167	}
	168
1da177e4 LT	169	static int slc90e66_config_drive_for_dma (ide_drive_t *drive)
	170	{
	171	u8 speed = ide_dma_speed(drive, slc90e66_ratemask(drive));
	172
44854add SS	173	if (!speed)
44854add SS	174	return 0;
1da177e4 LT	175
	176	(void) slc90e66_tune_chipset(drive, speed);
	177	return ide_dma_enable(drive);
	178	}
	179
	180	static int slc90e66_config_drive_xfer_rate (ide_drive_t *drive)
	181	{
	182	ide_hwif_t *hwif = HWIF(drive);
1da177e4 LT	183
	184	drive->init_speed = 0;
	185
7569e8dc BZ	186	if (ide_use_dma(drive) && slc90e66_config_drive_for_dma(drive))
7569e8dc BZ	187	return hwif->ide_dma_on(drive);
1da177e4	188
7569e8dc	189	if (ide_use_fast_pio(drive)) {
44854add SS	190	(void) hwif->speedproc(drive, XFER_PIO_0 +
44854add SS	191	ide_get_best_pio_mode(drive, 255, 4, NULL));
1da177e4 LT	192	return hwif->ide_dma_off_quietly(drive);
	193	}
	194	/* IORDY not supported */
	195	return 0;
	196	}
1da177e4	197
97319630	198	static void __devinit init_hwif_slc90e66 (ide_hwif_t *hwif)
1da177e4 LT	199	{
	200	u8 reg47 = 0;
	201	u8 mask = hwif->channel ? 0x01 : 0x02; /* bit0:Primary */
	202
	203	hwif->autodma = 0;
	204
	205	if (!hwif->irq)
	206	hwif->irq = hwif->channel ? 15 : 14;
	207
	208	hwif->speedproc = &slc90e66_tune_chipset;
24e6458d	209	hwif->tuneproc = &slc90e66_tune_drive;
1da177e4 LT	210
	211	pci_read_config_byte(hwif->pci_dev, 0x47, &reg47);
	212
	213	if (!hwif->dma_base) {
	214	hwif->drives[0].autotune = 1;
	215	hwif->drives[1].autotune = 1;
	216	return;
	217	}
	218
	219	hwif->atapi_dma = 1;
	220	hwif->ultra_mask = 0x1f;
24e6458d SS	221	hwif->mwdma_mask = 0x06;
24e6458d SS	222	hwif->swdma_mask = 0x04;
1da177e4	223
24e6458d	224	if (!hwif->udma_four) {
1da177e4 LT	225	/* bit[0(1)]: 0:80, 1:40 */
1da177e4 LT	226	hwif->udma_four = (reg47 & mask) ? 0 : 1;
24e6458d	227	}
1da177e4 LT	228
1da177e4 LT	229	hwif->ide_dma_check = &slc90e66_config_drive_xfer_rate;
24e6458d	230
1da177e4 LT	231	if (!noautodma)
	232	hwif->autodma = 1;
	233	hwif->drives[0].autodma = hwif->autodma;
	234	hwif->drives[1].autodma = hwif->autodma;
1da177e4 LT	235	}
	236
	237	static ide_pci_device_t slc90e66_chipset __devinitdata = {
	238	.name = "SLC90E66",
	239	.init_hwif = init_hwif_slc90e66,
	240	.channels = 2,
	241	.autodma = AUTODMA,
	242	.enablebits = {{0x41,0x80,0x80}, {0x43,0x80,0x80}},
	243	.bootable = ON_BOARD,
	244	};
	245
	246	static int __devinit slc90e66_init_one(struct pci_dev dev, const struct pci_device_id id)
	247	{
	248	return ide_setup_pci_device(dev, &slc90e66_chipset);
	249	}
	250
	251	static struct pci_device_id slc90e66_pci_tbl[] = {
f201f504	252	{ PCI_DEVICE(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1), 0},
1da177e4 LT	253	{ 0, },
	254	};
	255	MODULE_DEVICE_TABLE(pci, slc90e66_pci_tbl);
	256
	257	static struct pci_driver driver = {
	258	.name = "SLC90e66_IDE",
	259	.id_table = slc90e66_pci_tbl,
	260	.probe = slc90e66_init_one,
	261	};
	262
82ab1eec	263	static int __init slc90e66_ide_init(void)
1da177e4 LT	264	{
	265	return ide_pci_register_driver(&driver);
	266	}
	267
	268	module_init(slc90e66_ide_init);
	269
	270	MODULE_AUTHOR("Andre Hedrick");
	271	MODULE_DESCRIPTION("PCI driver module for SLC90E66 IDE");
	272	MODULE_LICENSE("GPL");