[mirror_ubuntu-zesty-kernel.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>

/**
 *	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,
};

#define DECLARE_ITE_DEV(name_str)			\
	{						\
		.name		= name_str,		\
		.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,		\
	}

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)
{
	return ide_pci_init_one(dev, &it8213_chipsets[id->driver_data], 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,
};

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>
9c6712c0 JL	13	#include <linux/hdreg.h>
	14	#include <linux/ide.h>
	15	#include <linux/init.h>
	16
88b2b32b BZ	17	/**
	18	* it8213_set_pio_mode - set host controller for PIO mode
	19	* @drive: drive
	20	* @pio: PIO mode number
9c6712c0	21	*
67881826	22	* Set the interface PIO mode.
9c6712c0 JL	23	*/
9c6712c0 JL	24
88b2b32b	25	static void it8213_set_pio_mode(ide_drive_t *drive, const u8 pio)
9c6712c0 JL	26	{
9c6712c0 JL	27	ide_hwif_t *hwif = HWIF(drive);
36501650	28	struct pci_dev *dev = to_pci_dev(hwif->dev);
67881826	29	int is_slave = drive->dn & 1;
9c6712c0 JL	30	int master_port = 0x40;
	31	int slave_port = 0x44;
	32	unsigned long flags;
	33	u16 master_data;
	34	u8 slave_data;
67881826 BZ	35	static DEFINE_SPINLOCK(tune_lock);
67881826 BZ	36	int control = 0;
9c6712c0	37
a2826190	38	static const u8 timings[][2] = {
67881826 BZ	39	{ 0, 0 },
	40	{ 0, 0 },
	41	{ 1, 0 },
	42	{ 2, 1 },
	43	{ 2, 3 }, };
9c6712c0	44
9c6712c0 JL	45	spin_lock_irqsave(&tune_lock, flags);
9c6712c0 JL	46	pci_read_config_word(dev, master_port, &master_data);
67881826 BZ	47
	48	if (pio > 1)
	49	control \|= 1; /* Programmable timing on */
	50	if (drive->media != ide_disk)
	51	control \|= 4; /* ATAPI */
	52	if (pio > 2)
	53	control \|= 2; /* IORDY */
9c6712c0	54	if (is_slave) {
67881826 BZ	55	master_data \|= 0x4000;
67881826 BZ	56	master_data &= ~0x0070;
9c6712c0	57	if (pio > 1)
67881826	58	master_data = master_data \| (control << 4);
9c6712c0 JL	59	pci_read_config_byte(dev, slave_port, &slave_data);
9c6712c0 JL	60	slave_data = slave_data & 0xf0;
67881826	61	slave_data = slave_data \| (timings[pio][0] << 2) \| timings[pio][1];
9c6712c0	62	} else {
67881826	63	master_data &= ~0x3307;
9c6712c0	64	if (pio > 1)
67881826	65	master_data = master_data \| control;
9c6712c0 JL	66	master_data = master_data \| (timings[pio][0] << 12) \| (timings[pio][1] << 8);
	67	}
	68	pci_write_config_word(dev, master_port, master_data);
	69	if (is_slave)
	70	pci_write_config_byte(dev, slave_port, slave_data);
	71	spin_unlock_irqrestore(&tune_lock, flags);
	72	}
	73
9c6712c0	74	/**
88b2b32b BZ	75	* it8213_set_dma_mode - set host controller for DMA mode
	76	* @drive: drive
	77	* @speed: DMA mode
9c6712c0	78	*
88b2b32b	79	* Tune the ITE chipset for the DMA mode.
9c6712c0 JL	80	*/
9c6712c0 JL	81
88b2b32b	82	static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed)
9c6712c0	83	{
9c6712c0	84	ide_hwif_t *hwif = HWIF(drive);
36501650	85	struct pci_dev *dev = to_pci_dev(hwif->dev);
9c6712c0	86	u8 maslave = 0x40;
9c6712c0 JL	87	int a_speed = 3 << (drive->dn * 4);
	88	int u_flag = 1 << drive->dn;
	89	int v_flag = 0x01 << drive->dn;
	90	int w_flag = 0x10 << drive->dn;
	91	int u_speed = 0;
	92	u16 reg4042, reg4a;
1c54a93d	93	u8 reg48, reg54, reg55;
9c6712c0 JL	94
	95	pci_read_config_word(dev, maslave, &reg4042);
	96	pci_read_config_byte(dev, 0x48, &reg48);
	97	pci_read_config_word(dev, 0x4a, &reg4a);
	98	pci_read_config_byte(dev, 0x54, &reg54);
	99	pci_read_config_byte(dev, 0x55, &reg55);
	100
67881826	101	if (speed >= XFER_UDMA_0) {
4db90a14 BZ	102	u8 udma = speed - XFER_UDMA_0;
	103
	104	u_speed = min_t(u8, 2 - (udma & 1), udma) << (drive->dn * 4);
	105
9c6712c0 JL	106	if (!(reg48 & u_flag))
9c6712c0 JL	107	pci_write_config_byte(dev, 0x48, reg48 \| u_flag);
a2826190	108	if (speed >= XFER_UDMA_5)
9c6712c0	109	pci_write_config_byte(dev, 0x55, (u8) reg55\|w_flag);
a2826190	110	else
9c6712c0	111	pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
9c6712c0 JL	112
	113	if ((reg4a & a_speed) != u_speed)
	114	pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) \| u_speed);
67881826	115	if (speed > XFER_UDMA_2) {
9c6712c0 JL	116	if (!(reg54 & v_flag))
	117	pci_write_config_byte(dev, 0x54, reg54 \| v_flag);
	118	} else
	119	pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
67881826	120	} else {
8c91abf8	121	const u8 mwdma_to_pio[] = { 0, 3, 4 };
1c54a93d	122	u8 pio;
8c91abf8	123
9c6712c0 JL	124	if (reg48 & u_flag)
	125	pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
	126	if (reg4a & a_speed)
	127	pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
	128	if (reg54 & v_flag)
	129	pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
	130	if (reg55 & w_flag)
	131	pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
8c91abf8 BZ	132
	133	if (speed >= XFER_MW_DMA_0)
	134	pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
	135	else
	136	pio = 2; /* only SWDMA2 is allowed */
68aaf815	137
1c54a93d BZ	138	it8213_set_pio_mode(drive, pio);
1c54a93d BZ	139	}
67881826	140	}
9c6712c0	141
bfa14b42 BZ	142	static u8 __devinit it8213_cable_detect(ide_hwif_t *hwif)
	143	{
	144	struct pci_dev *dev = to_pci_dev(hwif->dev);
	145	u8 reg42h = 0;
	146
	147	pci_read_config_byte(dev, 0x42, &reg42h);
	148
	149	return (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
	150	}
	151
ac95beed BZ	152	static const struct ide_port_ops it8213_port_ops = {
	153	.set_pio_mode = it8213_set_pio_mode,
	154	.set_dma_mode = it8213_set_dma_mode,
	155	.cable_detect = it8213_cable_detect,
	156	};
9c6712c0 JL	157
	158	#define DECLARE_ITE_DEV(name_str) \
	159	{ \
	160	.name = name_str, \
a2826190	161	.enablebits = { {0x41, 0x80, 0x80} }, \
ac95beed	162	.port_ops = &it8213_port_ops, \
5e71d9c5	163	.host_flags = IDE_HFLAG_SINGLE, \
4099d143	164	.pio_mask = ATA_PIO4, \
5f8b6c34 BZ	165	.swdma_mask = ATA_SWDMA2_ONLY, \
	166	.mwdma_mask = ATA_MWDMA12_ONLY, \
	167	.udma_mask = ATA_UDMA6, \
9c6712c0 JL	168	}
9c6712c0 JL	169
85620436	170	static const struct ide_port_info it8213_chipsets[] __devinitdata = {
9c6712c0 JL	171	/* 0 */ DECLARE_ITE_DEV("IT8213"),
	172	};
	173
	174
	175	/**
	176	* it8213_init_one - pci layer discovery entry
	177	* @dev: PCI device
	178	* @id: ident table entry
	179	*
	180	* Called by the PCI code when it finds an ITE8213 controller. As
	181	* this device follows the standard interfaces we can use the
	182	* standard helper functions to do almost all the work for us.
	183	*/
	184
	185	static int __devinit it8213_init_one(struct pci_dev dev, const struct pci_device_id id)
	186	{
6cdf6eb3	187	return ide_pci_init_one(dev, &it8213_chipsets[id->driver_data], NULL);
9c6712c0 JL	188	}
9c6712c0 JL	189
9cbcc5e3 BZ	190	static const struct pci_device_id it8213_pci_tbl[] = {
9cbcc5e3 BZ	191	{ PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8213), 0 },
9c6712c0 JL	192	{ 0, },
	193	};
	194
	195	MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);
	196
	197	static struct pci_driver driver = {
	198	.name = "ITE8213_IDE",
	199	.id_table = it8213_pci_tbl,
	200	.probe = it8213_init_one,
	201	};
	202
	203	static int __init it8213_ide_init(void)
	204	{
67881826 BZ	205	return ide_pci_register_driver(&driver);
67881826 BZ	206	}
9c6712c0 JL	207
	208	module_init(it8213_ide_init);
	209
67881826	210	MODULE_AUTHOR("Jack Lee, Alan Cox");
9c6712c0 JL	211	MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
9c6712c0 JL	212	MODULE_LICENSE("GPL");