[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/delay.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/init.h>

#include <asm/io.h>

/**
 *	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);
	}
}

/**
 *	init_hwif_it8213	-	set up hwif structs
 *	@hwif: interface to set up
 *
 *	We do the basic set up of the interface structure.
 */

static void __devinit init_hwif_it8213(ide_hwif_t *hwif)
{
	struct pci_dev *dev = to_pci_dev(hwif->dev);
	u8 reg42h = 0;

	hwif->set_dma_mode = &it8213_set_dma_mode;
	hwif->set_pio_mode = &it8213_set_pio_mode;

	if (!hwif->dma_base)
		return;

	pci_read_config_byte(dev, 0x42, &reg42h);

	if (hwif->cbl != ATA_CBL_PATA40_SHORT)
		hwif->cbl = (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
}


#define DECLARE_ITE_DEV(name_str)			\
	{						\
		.name		= name_str,		\
		.init_hwif	= init_hwif_it8213,	\
		.enablebits	= {{0x41,0x80,0x80}}, \
		.host_flags	= IDE_HFLAG_SINGLE |	\
				  IDE_HFLAG_BOOTABLE,	\
		.pio_mask	= ATA_PIO4,		\
		.swdma_mask	= ATA_SWDMA2_ONLY,	\
		.mwdma_mask	= ATA_MWDMA12_ONLY,	\
		.udma_mask	= ATA_UDMA6,		\
	}

static const struct ide_port_info it8213_chipsets[] __devinitdata = {
	/* 0 */ DECLARE_ITE_DEV("IT8213"),
};


/**
 *	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)
{
	ide_setup_pci_device(dev, &it8213_chipsets[id->driver_data]);
	return 0;
}

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,
};

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

module_init(it8213_ide_init);

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>
	13	#include <linux/delay.h>
	14	#include <linux/hdreg.h>
	15	#include <linux/ide.h>
	16	#include <linux/init.h>
	17
	18	#include <asm/io.h>
	19
88b2b32b BZ	20	/**
	21	* it8213_set_pio_mode - set host controller for PIO mode
	22	* @drive: drive
	23	* @pio: PIO mode number
9c6712c0	24	*
67881826	25	* Set the interface PIO mode.
9c6712c0 JL	26	*/
9c6712c0 JL	27
88b2b32b	28	static void it8213_set_pio_mode(ide_drive_t *drive, const u8 pio)
9c6712c0 JL	29	{
9c6712c0 JL	30	ide_hwif_t *hwif = HWIF(drive);
36501650	31	struct pci_dev *dev = to_pci_dev(hwif->dev);
67881826	32	int is_slave = drive->dn & 1;
9c6712c0 JL	33	int master_port = 0x40;
	34	int slave_port = 0x44;
	35	unsigned long flags;
	36	u16 master_data;
	37	u8 slave_data;
67881826 BZ	38	static DEFINE_SPINLOCK(tune_lock);
67881826 BZ	39	int control = 0;
9c6712c0	40
67881826 BZ	41	static const u8 timings[][2]= {
	42	{ 0, 0 },
	43	{ 0, 0 },
	44	{ 1, 0 },
	45	{ 2, 1 },
	46	{ 2, 3 }, };
9c6712c0	47
9c6712c0 JL	48	spin_lock_irqsave(&tune_lock, flags);
9c6712c0 JL	49	pci_read_config_word(dev, master_port, &master_data);
67881826 BZ	50
	51	if (pio > 1)
	52	control \|= 1; /* Programmable timing on */
	53	if (drive->media != ide_disk)
	54	control \|= 4; /* ATAPI */
	55	if (pio > 2)
	56	control \|= 2; /* IORDY */
9c6712c0	57	if (is_slave) {
67881826 BZ	58	master_data \|= 0x4000;
67881826 BZ	59	master_data &= ~0x0070;
9c6712c0	60	if (pio > 1)
67881826	61	master_data = master_data \| (control << 4);
9c6712c0 JL	62	pci_read_config_byte(dev, slave_port, &slave_data);
9c6712c0 JL	63	slave_data = slave_data & 0xf0;
67881826	64	slave_data = slave_data \| (timings[pio][0] << 2) \| timings[pio][1];
9c6712c0	65	} else {
67881826	66	master_data &= ~0x3307;
9c6712c0	67	if (pio > 1)
67881826	68	master_data = master_data \| control;
9c6712c0 JL	69	master_data = master_data \| (timings[pio][0] << 12) \| (timings[pio][1] << 8);
	70	}
	71	pci_write_config_word(dev, master_port, master_data);
	72	if (is_slave)
	73	pci_write_config_byte(dev, slave_port, slave_data);
	74	spin_unlock_irqrestore(&tune_lock, flags);
	75	}
	76
9c6712c0	77	/**
88b2b32b BZ	78	* it8213_set_dma_mode - set host controller for DMA mode
	79	* @drive: drive
	80	* @speed: DMA mode
9c6712c0	81	*
88b2b32b	82	* Tune the ITE chipset for the DMA mode.
9c6712c0 JL	83	*/
9c6712c0 JL	84
88b2b32b	85	static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed)
9c6712c0	86	{
9c6712c0	87	ide_hwif_t *hwif = HWIF(drive);
36501650	88	struct pci_dev *dev = to_pci_dev(hwif->dev);
9c6712c0	89	u8 maslave = 0x40;
9c6712c0 JL	90	int a_speed = 3 << (drive->dn * 4);
	91	int u_flag = 1 << drive->dn;
	92	int v_flag = 0x01 << drive->dn;
	93	int w_flag = 0x10 << drive->dn;
	94	int u_speed = 0;
	95	u16 reg4042, reg4a;
1c54a93d	96	u8 reg48, reg54, reg55;
9c6712c0 JL	97
	98	pci_read_config_word(dev, maslave, &reg4042);
	99	pci_read_config_byte(dev, 0x48, &reg48);
	100	pci_read_config_word(dev, 0x4a, &reg4a);
	101	pci_read_config_byte(dev, 0x54, &reg54);
	102	pci_read_config_byte(dev, 0x55, &reg55);
	103
67881826	104	if (speed >= XFER_UDMA_0) {
4db90a14 BZ	105	u8 udma = speed - XFER_UDMA_0;
	106
	107	u_speed = min_t(u8, 2 - (udma & 1), udma) << (drive->dn * 4);
	108
9c6712c0 JL	109	if (!(reg48 & u_flag))
	110	pci_write_config_byte(dev, 0x48, reg48 \| u_flag);
	111	if (speed >= XFER_UDMA_5) {
	112	pci_write_config_byte(dev, 0x55, (u8) reg55\|w_flag);
	113	} else {
	114	pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
	115	}
	116
	117	if ((reg4a & a_speed) != u_speed)
	118	pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) \| u_speed);
67881826	119	if (speed > XFER_UDMA_2) {
9c6712c0 JL	120	if (!(reg54 & v_flag))
	121	pci_write_config_byte(dev, 0x54, reg54 \| v_flag);
	122	} else
	123	pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
67881826	124	} else {
8c91abf8	125	const u8 mwdma_to_pio[] = { 0, 3, 4 };
1c54a93d	126	u8 pio;
8c91abf8	127
9c6712c0 JL	128	if (reg48 & u_flag)
	129	pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
	130	if (reg4a & a_speed)
	131	pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
	132	if (reg54 & v_flag)
	133	pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
	134	if (reg55 & w_flag)
	135	pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
8c91abf8 BZ	136
	137	if (speed >= XFER_MW_DMA_0)
	138	pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
	139	else
	140	pio = 2; /* only SWDMA2 is allowed */
68aaf815	141
1c54a93d BZ	142	it8213_set_pio_mode(drive, pio);
1c54a93d BZ	143	}
67881826	144	}
9c6712c0	145
9c6712c0 JL	146	/**
	147	* init_hwif_it8213 - set up hwif structs
	148	* @hwif: interface to set up
	149	*
0ae2e178	150	* We do the basic set up of the interface structure.
9c6712c0 JL	151	*/
	152
	153	static void __devinit init_hwif_it8213(ide_hwif_t *hwif)
	154	{
36501650	155	struct pci_dev *dev = to_pci_dev(hwif->dev);
49521f97	156	u8 reg42h = 0;
9c6712c0	157
88b2b32b	158	hwif->set_dma_mode = &it8213_set_dma_mode;
26bcb879	159	hwif->set_pio_mode = &it8213_set_pio_mode;
9c6712c0	160
9c6712c0	161	if (!hwif->dma_base)
67881826 BZ	162	return;
67881826 BZ	163
36501650	164	pci_read_config_byte(dev, 0x42, &reg42h);
9c6712c0	165
49521f97 BZ	166	if (hwif->cbl != ATA_CBL_PATA40_SHORT)
49521f97 BZ	167	hwif->cbl = (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
9c6712c0 JL	168	}
	169
	170
	171	#define DECLARE_ITE_DEV(name_str) \
	172	{ \
	173	.name = name_str, \
9c6712c0	174	.init_hwif = init_hwif_it8213, \
9c6712c0	175	.enablebits = {{0x41,0x80,0x80}}, \
7cab14a7 BZ	176	.host_flags = IDE_HFLAG_SINGLE \| \
7cab14a7 BZ	177	IDE_HFLAG_BOOTABLE, \
4099d143	178	.pio_mask = ATA_PIO4, \
5f8b6c34 BZ	179	.swdma_mask = ATA_SWDMA2_ONLY, \
	180	.mwdma_mask = ATA_MWDMA12_ONLY, \
	181	.udma_mask = ATA_UDMA6, \
9c6712c0 JL	182	}
9c6712c0 JL	183
85620436	184	static const struct ide_port_info it8213_chipsets[] __devinitdata = {
9c6712c0 JL	185	/* 0 */ DECLARE_ITE_DEV("IT8213"),
	186	};
	187
	188
	189	/**
	190	* it8213_init_one - pci layer discovery entry
	191	* @dev: PCI device
	192	* @id: ident table entry
	193	*
	194	* Called by the PCI code when it finds an ITE8213 controller. As
	195	* this device follows the standard interfaces we can use the
	196	* standard helper functions to do almost all the work for us.
	197	*/
	198
	199	static int __devinit it8213_init_one(struct pci_dev dev, const struct pci_device_id id)
	200	{
	201	ide_setup_pci_device(dev, &it8213_chipsets[id->driver_data]);
	202	return 0;
	203	}
	204
9cbcc5e3 BZ	205	static const struct pci_device_id it8213_pci_tbl[] = {
9cbcc5e3 BZ	206	{ PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8213), 0 },
9c6712c0 JL	207	{ 0, },
	208	};
	209
	210	MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);
	211
	212	static struct pci_driver driver = {
	213	.name = "ITE8213_IDE",
	214	.id_table = it8213_pci_tbl,
	215	.probe = it8213_init_one,
	216	};
	217
	218	static int __init it8213_ide_init(void)
	219	{
67881826 BZ	220	return ide_pci_register_driver(&driver);
67881826 BZ	221	}
9c6712c0 JL	222
	223	module_init(it8213_ide_init);
	224
67881826	225	MODULE_AUTHOR("Jack Lee, Alan Cox");
9c6712c0 JL	226	MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
9c6712c0 JL	227	MODULE_LICENSE("GPL");