[deliverable/linux.git] / drivers / ide / pci / it8213.c

/*
 * ITE 8213 IDE driver
 *
 * Copyright (C) 2006 Jack Lee
 * Copyright (C) 2006 Alan Cox
 * Copyright (C) 2007 Bartlomiej Zolnierkiewicz
 */

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

#define DRV_NAME "it8213"

/**
 *	it8213_set_pio_mode	-	set host controller for PIO mode
 *	@drive: drive
 *	@pio: PIO mode number
 *
 *	Set the interface PIO mode.
 */

static void it8213_set_pio_mode(ide_drive_t *drive, const u8 pio)
{
	ide_hwif_t *hwif	= HWIF(drive);
	struct pci_dev *dev	= to_pci_dev(hwif->dev);
	int is_slave		= drive->dn & 1;
	int master_port		= 0x40;
	int slave_port		= 0x44;
	unsigned long flags;
	u16 master_data;
	u8 slave_data;
	static DEFINE_SPINLOCK(tune_lock);
	int control = 0;

	static const u8 timings[][2] = {
					{ 0, 0 },
					{ 0, 0 },
					{ 1, 0 },
					{ 2, 1 },
					{ 2, 3 }, };

	spin_lock_irqsave(&tune_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;	/* ATAPI */
	if (pio > 2)
		control |= 2;	/* IORDY */
	if (is_slave) {
		master_data |=  0x4000;
		master_data &= ~0x0070;
		if (pio > 1)
			master_data = master_data | (control << 4);
		pci_read_config_byte(dev, slave_port, &slave_data);
		slave_data = slave_data & 0xf0;
		slave_data = slave_data | (timings[pio][0] << 2) | timings[pio][1];
	} else {
		master_data &= ~0x3307;
		if (pio > 1)
			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(&tune_lock, flags);
}

/**
 *	it8213_set_dma_mode	-	set host controller for DMA mode
 *	@drive: drive
 *	@speed: DMA mode
 *
 *	Tune the ITE chipset for the DMA mode.
 */

static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed)
{
	ide_hwif_t *hwif	= HWIF(drive);
	struct pci_dev *dev	= to_pci_dev(hwif->dev);
	u8 maslave		= 0x40;
	int a_speed		= 3 << (drive->dn * 4);
	int u_flag		= 1 << drive->dn;
	int v_flag		= 0x01 << drive->dn;
	int w_flag		= 0x10 << drive->dn;
	int u_speed		= 0;
	u16			reg4042, reg4a;
	u8			reg48, reg54, reg55;

	pci_read_config_word(dev, maslave, &reg4042);
	pci_read_config_byte(dev, 0x48, &reg48);
	pci_read_config_word(dev, 0x4a, &reg4a);
	pci_read_config_byte(dev, 0x54, &reg54);
	pci_read_config_byte(dev, 0x55, &reg55);

	if (speed >= XFER_UDMA_0) {
		u8 udma = speed - XFER_UDMA_0;

		u_speed = min_t(u8, 2 - (udma & 1), udma) << (drive->dn * 4);

		if (!(reg48 & u_flag))
			pci_write_config_byte(dev, 0x48, reg48 | u_flag);
		if (speed >= XFER_UDMA_5)
			pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag);
		else
			pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);

		if ((reg4a & a_speed) != u_speed)
			pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed);
		if (speed > XFER_UDMA_2) {
			if (!(reg54 & v_flag))
				pci_write_config_byte(dev, 0x54, reg54 | v_flag);
		} else
			pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
	} else {
		const u8 mwdma_to_pio[] = { 0, 3, 4 };
		u8 pio;

		if (reg48 & u_flag)
			pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
		if (reg4a & a_speed)
			pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
		if (reg54 & v_flag)
			pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
		if (reg55 & w_flag)
			pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);

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

		it8213_set_pio_mode(drive, pio);
	}
}

static u8 __devinit it8213_cable_detect(ide_hwif_t *hwif)
{
	struct pci_dev *dev = to_pci_dev(hwif->dev);
	u8 reg42h = 0;

	pci_read_config_byte(dev, 0x42, &reg42h);

	return (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
}

static const struct ide_port_ops it8213_port_ops = {
	.set_pio_mode		= it8213_set_pio_mode,
	.set_dma_mode		= it8213_set_dma_mode,
	.cable_detect		= it8213_cable_detect,
};

static const struct ide_port_info it8213_chipset __devinitdata = {
	.name		= DRV_NAME,
	.enablebits	= { {0x41, 0x80, 0x80} },
	.port_ops	= &it8213_port_ops,
	.host_flags	= IDE_HFLAG_SINGLE,
	.pio_mask	= ATA_PIO4,
	.swdma_mask	= ATA_SWDMA2_ONLY,
	.mwdma_mask	= ATA_MWDMA12_ONLY,
	.udma_mask	= ATA_UDMA6,
};

/**
 *	it8213_init_one	-	pci layer discovery entry
 *	@dev: PCI device
 *	@id: ident table entry
 *
 *	Called by the PCI code when it finds an ITE8213 controller. As
 *	this device follows the standard interfaces we can use the
 *	standard helper functions to do almost all the work for us.
 */

static int __devinit it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
	return ide_pci_init_one(dev, &it8213_chipset, NULL);
}

static const struct pci_device_id it8213_pci_tbl[] = {
	{ PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8213), 0 },
	{ 0, },
};

MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);

static struct pci_driver driver = {
	.name		= "ITE8213_IDE",
	.id_table	= it8213_pci_tbl,
	.probe		= it8213_init_one,
	.remove		= ide_pci_remove,
};

static int __init it8213_ide_init(void)
{
	return ide_pci_register_driver(&driver);
}

static void __exit it8213_ide_exit(void)
{
	pci_unregister_driver(&driver);
}

module_init(it8213_ide_init);
module_exit(it8213_ide_exit);

MODULE_AUTHOR("Jack Lee, Alan Cox");
MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
MODULE_LICENSE("GPL");
Commit	Line	Data
67881826 BZ	1	/*
	2	* ITE 8213 IDE driver
	3	*
	4	* Copyright (C) 2006 Jack Lee
	5	* Copyright (C) 2006 Alan Cox
	6	* Copyright (C) 2007 Bartlomiej Zolnierkiewicz
	7	*/
	8
9c6712c0 JL	9	#include <linux/kernel.h>
	10	#include <linux/types.h>
	11	#include <linux/module.h>
	12	#include <linux/pci.h>
9c6712c0 JL	13	#include <linux/hdreg.h>
	14	#include <linux/ide.h>
	15	#include <linux/init.h>
	16
ced3ec8a BZ	17	#define DRV_NAME "it8213"
ced3ec8a BZ	18
88b2b32b BZ	19	/**
	20	* it8213_set_pio_mode - set host controller for PIO mode
	21	* @drive: drive
	22	* @pio: PIO mode number
9c6712c0	23	*
67881826	24	* Set the interface PIO mode.
9c6712c0 JL	25	*/
9c6712c0 JL	26
88b2b32b	27	static void it8213_set_pio_mode(ide_drive_t *drive, const u8 pio)
9c6712c0 JL	28	{
9c6712c0 JL	29	ide_hwif_t *hwif = HWIF(drive);
36501650	30	struct pci_dev *dev = to_pci_dev(hwif->dev);
67881826	31	int is_slave = drive->dn & 1;
9c6712c0 JL	32	int master_port = 0x40;
	33	int slave_port = 0x44;
	34	unsigned long flags;
	35	u16 master_data;
	36	u8 slave_data;
67881826 BZ	37	static DEFINE_SPINLOCK(tune_lock);
67881826 BZ	38	int control = 0;
9c6712c0	39
a2826190	40	static const u8 timings[][2] = {
67881826 BZ	41	{ 0, 0 },
	42	{ 0, 0 },
	43	{ 1, 0 },
	44	{ 2, 1 },
	45	{ 2, 3 }, };
9c6712c0	46
9c6712c0 JL	47	spin_lock_irqsave(&tune_lock, flags);
9c6712c0 JL	48	pci_read_config_word(dev, master_port, &master_data);
67881826 BZ	49
	50	if (pio > 1)
	51	control \|= 1; /* Programmable timing on */
	52	if (drive->media != ide_disk)
	53	control \|= 4; /* ATAPI */
	54	if (pio > 2)
	55	control \|= 2; /* IORDY */
9c6712c0	56	if (is_slave) {
67881826 BZ	57	master_data \|= 0x4000;
67881826 BZ	58	master_data &= ~0x0070;
9c6712c0	59	if (pio > 1)
67881826	60	master_data = master_data \| (control << 4);
9c6712c0 JL	61	pci_read_config_byte(dev, slave_port, &slave_data);
9c6712c0 JL	62	slave_data = slave_data & 0xf0;
67881826	63	slave_data = slave_data \| (timings[pio][0] << 2) \| timings[pio][1];
9c6712c0	64	} else {
67881826	65	master_data &= ~0x3307;
9c6712c0	66	if (pio > 1)
67881826	67	master_data = master_data \| control;
9c6712c0 JL	68	master_data = master_data \| (timings[pio][0] << 12) \| (timings[pio][1] << 8);
	69	}
	70	pci_write_config_word(dev, master_port, master_data);
	71	if (is_slave)
	72	pci_write_config_byte(dev, slave_port, slave_data);
	73	spin_unlock_irqrestore(&tune_lock, flags);
	74	}
	75
9c6712c0	76	/**
88b2b32b BZ	77	* it8213_set_dma_mode - set host controller for DMA mode
	78	* @drive: drive
	79	* @speed: DMA mode
9c6712c0	80	*
88b2b32b	81	* Tune the ITE chipset for the DMA mode.
9c6712c0 JL	82	*/
9c6712c0 JL	83
88b2b32b	84	static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed)
9c6712c0	85	{
9c6712c0	86	ide_hwif_t *hwif = HWIF(drive);
36501650	87	struct pci_dev *dev = to_pci_dev(hwif->dev);
9c6712c0	88	u8 maslave = 0x40;
9c6712c0 JL	89	int a_speed = 3 << (drive->dn * 4);
	90	int u_flag = 1 << drive->dn;
	91	int v_flag = 0x01 << drive->dn;
	92	int w_flag = 0x10 << drive->dn;
	93	int u_speed = 0;
	94	u16 reg4042, reg4a;
1c54a93d	95	u8 reg48, reg54, reg55;
9c6712c0 JL	96
	97	pci_read_config_word(dev, maslave, &reg4042);
	98	pci_read_config_byte(dev, 0x48, &reg48);
	99	pci_read_config_word(dev, 0x4a, &reg4a);
	100	pci_read_config_byte(dev, 0x54, &reg54);
	101	pci_read_config_byte(dev, 0x55, &reg55);
	102
67881826	103	if (speed >= XFER_UDMA_0) {
4db90a14 BZ	104	u8 udma = speed - XFER_UDMA_0;
	105
	106	u_speed = min_t(u8, 2 - (udma & 1), udma) << (drive->dn * 4);
	107
9c6712c0 JL	108	if (!(reg48 & u_flag))
9c6712c0 JL	109	pci_write_config_byte(dev, 0x48, reg48 \| u_flag);
a2826190	110	if (speed >= XFER_UDMA_5)
9c6712c0	111	pci_write_config_byte(dev, 0x55, (u8) reg55\|w_flag);
a2826190	112	else
9c6712c0	113	pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
9c6712c0 JL	114
	115	if ((reg4a & a_speed) != u_speed)
	116	pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) \| u_speed);
67881826	117	if (speed > XFER_UDMA_2) {
9c6712c0 JL	118	if (!(reg54 & v_flag))
	119	pci_write_config_byte(dev, 0x54, reg54 \| v_flag);
	120	} else
	121	pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
67881826	122	} else {
8c91abf8	123	const u8 mwdma_to_pio[] = { 0, 3, 4 };
1c54a93d	124	u8 pio;
8c91abf8	125
9c6712c0 JL	126	if (reg48 & u_flag)
	127	pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
	128	if (reg4a & a_speed)
	129	pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
	130	if (reg54 & v_flag)
	131	pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
	132	if (reg55 & w_flag)
	133	pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
8c91abf8 BZ	134
	135	if (speed >= XFER_MW_DMA_0)
	136	pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
	137	else
	138	pio = 2; /* only SWDMA2 is allowed */
68aaf815	139
1c54a93d BZ	140	it8213_set_pio_mode(drive, pio);
1c54a93d BZ	141	}
67881826	142	}
9c6712c0	143
bfa14b42 BZ	144	static u8 __devinit it8213_cable_detect(ide_hwif_t *hwif)
	145	{
	146	struct pci_dev *dev = to_pci_dev(hwif->dev);
	147	u8 reg42h = 0;
	148
	149	pci_read_config_byte(dev, 0x42, &reg42h);
	150
	151	return (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
	152	}
	153
ac95beed BZ	154	static const struct ide_port_ops it8213_port_ops = {
	155	.set_pio_mode = it8213_set_pio_mode,
	156	.set_dma_mode = it8213_set_dma_mode,
	157	.cable_detect = it8213_cable_detect,
	158	};
9c6712c0	159
29f1ca92	160	static const struct ide_port_info it8213_chipset __devinitdata = {
ced3ec8a	161	.name = DRV_NAME,
29f1ca92 BZ	162	.enablebits = { {0x41, 0x80, 0x80} },
	163	.port_ops = &it8213_port_ops,
	164	.host_flags = IDE_HFLAG_SINGLE,
	165	.pio_mask = ATA_PIO4,
	166	.swdma_mask = ATA_SWDMA2_ONLY,
	167	.mwdma_mask = ATA_MWDMA12_ONLY,
	168	.udma_mask = ATA_UDMA6,
9c6712c0 JL	169	};
9c6712c0 JL	170
9c6712c0 JL	171	/**
	172	* it8213_init_one - pci layer discovery entry
	173	* @dev: PCI device
	174	* @id: ident table entry
	175	*
	176	* Called by the PCI code when it finds an ITE8213 controller. As
	177	* this device follows the standard interfaces we can use the
	178	* standard helper functions to do almost all the work for us.
	179	*/
	180
	181	static int __devinit it8213_init_one(struct pci_dev dev, const struct pci_device_id id)
	182	{
29f1ca92	183	return ide_pci_init_one(dev, &it8213_chipset, NULL);
9c6712c0 JL	184	}
9c6712c0 JL	185
9cbcc5e3 BZ	186	static const struct pci_device_id it8213_pci_tbl[] = {
9cbcc5e3 BZ	187	{ PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8213), 0 },
9c6712c0 JL	188	{ 0, },
	189	};
	190
	191	MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);
	192
	193	static struct pci_driver driver = {
	194	.name = "ITE8213_IDE",
	195	.id_table = it8213_pci_tbl,
	196	.probe = it8213_init_one,
5102f768	197	.remove = ide_pci_remove,
9c6712c0 JL	198	};
	199
	200	static int __init it8213_ide_init(void)
	201	{
67881826 BZ	202	return ide_pci_register_driver(&driver);
67881826 BZ	203	}
9c6712c0	204
5102f768 BZ	205	static void __exit it8213_ide_exit(void)
	206	{
	207	pci_unregister_driver(&driver);
	208	}
	209
9c6712c0	210	module_init(it8213_ide_init);
5102f768	211	module_exit(it8213_ide_exit);
9c6712c0	212
67881826	213	MODULE_AUTHOR("Jack Lee, Alan Cox");
9c6712c0 JL	214	MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
9c6712c0 JL	215	MODULE_LICENSE("GPL");