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Commit 9c6712c0 authored by Jack Lee's avatar Jack Lee Committed by Bartlomiej Zolnierkiewicz
Browse files

ide: add it8213 IDE driver 



From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent a534b68d

drivers/ide/Kconfig

+5 −0
Original line number Diff line number Diff line
@@ -606,6 +606,11 @@ config BLK_DEV_PIIX 
	  the kernel to change PIO, DMA and UDMA speeds and to configure

	  the chip to optimum performance.



config BLK_DEV_IT8213

	tristate "IT8213 IDE support"

	help

	 This driver adds support for the ITE 8213 IDE controller.



config BLK_DEV_IT821X

	tristate "IT821X IDE support"

	help

drivers/ide/pci/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -11,7 +11,7 @@ obj-$(CONFIG_BLK_DEV_SC1200) += sc1200.o 
obj-$(CONFIG_BLK_DEV_CY82C693)		+= cy82c693.o

obj-$(CONFIG_BLK_DEV_HPT34X)		+= hpt34x.o

obj-$(CONFIG_BLK_DEV_HPT366)		+= hpt366.o

#obj-$(CONFIG_BLK_DEV_HPT37X)		+= hpt37x.o

obj-$(CONFIG_BLK_DEV_IT8213)		+= it8213.o

obj-$(CONFIG_BLK_DEV_IT821X)		+= it821x.o

obj-$(CONFIG_BLK_DEV_JMICRON)		+= jmicron.o

obj-$(CONFIG_BLK_DEV_NS87415)		+= ns87415.o

drivers/ide/pci/it8213.c

0 → 100644
+402 −0
Original line number Diff line number Diff line 
#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_ratemask	-	Compute available modes

 *	@drive: IDE drive

 *

 *	Compute the available speeds for the devices on the interface. This

 *	is all modes to ATA100 clipped by drive cable setup.

 */



static u8 it8213_ratemask (ide_drive_t *drive)

{

	u8 mode	= 4;

	if (!eighty_ninty_three(drive))

		mode = min(mode, (u8)1);

	return mode;

}



/**

 *	it8213_dma_2_pio		-	return the PIO mode matching DMA

 *	@xfer_rate: transfer speed

 *

 *	Returns the nearest equivalent PIO timing for the PIO or DMA

 *	mode requested by the controller.

 */



static u8 it8213_dma_2_pio (u8 xfer_rate) {

	switch(xfer_rate) {

		case XFER_UDMA_6:

		case XFER_UDMA_5:

		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 spinlock_t tune_lock = SPIN_LOCK_UNLOCKED;



/*

 *	it8213_tuneproc	-	tune a drive

 *	@drive: drive to tune

 *	@mode_wanted: the target operating mode

 *

 *	Load the timing settings for this device mode into the

 *	controller. By the time we are called the mode has been

 *	modified as neccessary to handle the absence of seperate

 *	master/slave timers for MWDMA/PIO.

 *

 *	This code is only used in pass through mode.

 */



static void it8213_tuneproc (ide_drive_t *drive,  u8 pio)

{

	ide_hwif_t *hwif	= HWIF(drive);

	struct pci_dev *dev	= hwif->pci_dev;

	int is_slave		= (&hwif->drives[1] == drive);

	int master_port		= 0x40;

	int slave_port		= 0x44;

	unsigned long flags;

	u16 master_data;

	u8 slave_data;



	u8 timings[][2]	= { { 0, 0 },

			    { 0, 0 },

			    { 1, 0 },

			    { 2, 1 },

			    { 2, 3 }, };



	pio = ide_get_best_pio_mode(drive, pio, 5, NULL);



	spin_lock_irqsave(&tune_lock, flags);

	pci_read_config_word(dev, master_port, &master_data);

	if (is_slave) {

		master_data = master_data | 0x4000;

		if (pio > 1)



			master_data = master_data | 0x0070;

		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]) << 0));

	} else {

		master_data = master_data & 0xccf8;

		if (pio > 1)



			master_data = master_data | 0x0007;

		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_tune_chipset	-	set controller timings

 *	@drive: Drive to set up

 *	@xferspeed: speed we want to achieve

 *

 *	Tune the ITE chipset for the desired mode. If we can't achieve

 *	the desired mode then tune for a lower one, but ultimately

 *	make the thing work.

 */



static int it8213_tune_chipset (ide_drive_t *drive, byte xferspeed)

{



	ide_hwif_t *hwif	= HWIF(drive);

	struct pci_dev *dev	= hwif->pci_dev;

	u8 maslave		= 0x40;

	u8 speed		= ide_rate_filter(it8213_ratemask(drive), xferspeed);

	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);



	switch(speed) {

		case XFER_UDMA_6:

		case XFER_UDMA_4:

		case XFER_UDMA_2:u_speed = 2 << (drive->dn * 4); break;

		case XFER_UDMA_5:

		case XFER_UDMA_3:

		case XFER_UDMA_1:u_speed = 1 << (drive->dn * 4); break;

		case XFER_UDMA_0:u_speed = 0 << (drive->dn * 4); break;

			break;

		case XFER_MW_DMA_2:

		case XFER_MW_DMA_1:

		case XFER_MW_DMA_0:

			break;

		case XFER_PIO_4:

		case XFER_PIO_3:

		case XFER_PIO_2:

		case XFER_PIO_1:

		case XFER_PIO_0:

			break;

		default:

			return -1;

	}



		if (speed >= XFER_UDMA_0)

		{

		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 /*if(speed >= XFER_UDMA_0)*/

		{

		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);

		}

	it8213_tuneproc(drive, it8213_dma_2_pio(speed));

	return ide_config_drive_speed(drive, speed);

	}





/*

 *	config_chipset_for_dma	-	configure for DMA

 *	@drive: drive to configure

 *

 *	Called by the IDE layer when it wants the timings set up.

 */



static int config_chipset_for_dma (ide_drive_t *drive)

{

	  u8 speed	= ide_dma_speed(drive, it8213_ratemask(drive));

	if (!speed)

	{

		u8 tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL);

		speed = it8213_dma_2_pio(XFER_PIO_0 + tspeed);

	}

//	config_it8213_chipset_for_pio(drive, !speed);

	it8213_tune_chipset(drive, speed);

	return ide_dma_enable(drive);

}



/**

 *	config_it8213_chipset_for_pio	-	set drive timings

 *	@drive: drive to tune

 *	@speed we want

 *

 *	Compute the best pio mode we can for a given device. We must

 *	pick a speed that does not cause problems with the other device

 *	on the cable.

 */

/*

static void config_it8213_chipset_for_pio (ide_drive_t *drive, byte set_speed)

{

	ide_hwif_t *hwif	= HWIF(drive);

//	u8 unit = drive->select.b.unit;

	ide_hwif_t *hwif = drive->hwif;

	ide_drive_t *pair = &hwif->drives[1-unit];

	u8 speed = 0, set_pio	= ide_get_best_pio_mode(drive, 255, 5, NULL);

	u8 pair_pio;



	if(pair != NULL) {

		pair_pio = ide_get_best_pio_mode(pair, 255, 5, NULL);

		if(pair_pio < set_pio)

			set_pio = pair_pio;

	}

	it8213_tuneproc(drive, set_pio);

	speed = XFER_PIO_0 + set_pio;

	if (set_speed)

		(void) ide_config_drive_speed(drive, speed);

}

*/

/**

 *	it8213_configure_drive_for_dma	-	set up for DMA transfers

 *	@drive: drive we are going to set up

 *

 *	Set up the drive for DMA, tune the controller and drive as

 *	required. If the drive isn't suitable for DMA or we hit

 *	other problems then we will drop down to PIO and set up

 *	PIO appropriately

 */



static int it8213_config_drive_for_dma (ide_drive_t *drive)

{

//	ide_hwif_t *hwif	= drive->hwif;

//	struct hd_driveid *id = drive->id;

	ide_hwif_t *hwif	= HWIF(drive);

	if (ide_use_dma(drive)) {

		if (config_chipset_for_dma(drive))

			return hwif->ide_dma_on(drive);

	}

//	config_it8213_chipset_for_pio(drive, 1);

	hwif->tuneproc(drive, 255);

 	return hwif->ide_dma_off_quietly(drive);

}





static unsigned int __devinit init_chipset_it8213(struct pci_dev *dev, const char *name)

{

	printk(KERN_INFO "it8213: controller in IDE mode.\n");

	return 0;

}





/**

 *	init_hwif_it8213	-	set up hwif structs

 *	@hwif: interface to set up

 *

 *	We do the basic set up of the interface structure. The IT8212

 *	requires several custom handlers so we override the default

 *	ide DMA handlers appropriately

 */



static void __devinit init_hwif_it8213(ide_hwif_t *hwif)

{

	u8 reg42h = 0, ata66 = 0;

	u8 mask = 0x02;



	hwif->atapi_dma = 1;



	hwif->speedproc = &it8213_tune_chipset;

	hwif->tuneproc	= &it8213_tuneproc;



	hwif->autodma = 0;



	hwif->drives[0].autotune = 1;

	hwif->drives[1].autotune = 1;



	if (!hwif->dma_base)

		goto fallback;

	hwif->atapi_dma = 1;

	hwif->ultra_mask = 0x7f;

	hwif->mwdma_mask = 0x07;

	hwif->swdma_mask = 0x07;



	pci_read_config_byte(hwif->pci_dev, 0x42, &reg42h);

	ata66 = (reg42h & mask) ? 0 : 1;



	hwif->ide_dma_check = &it8213_config_drive_for_dma;

	if (!(hwif->udma_four))

		hwif->udma_four = ata66;

//		hwif->udma_four = 0;



	/*

	 *	The BIOS often doesn't set up DMA on this controller

	 *	so we always do it.

	 */

	if (!noautodma)

		hwif->autodma = 1;



	hwif->drives[0].autodma = hwif->autodma;

	hwif->drives[1].autodma = hwif->autodma;

	return;

fallback:

	hwif->autodma = 0;

	return;

}





#define DECLARE_ITE_DEV(name_str)			\

	{						\

		.name		= name_str,		\

		.init_chipset	= init_chipset_it8213,	\

		.init_hwif	= init_hwif_it8213,	\

		.channels	= 1,			\

		.autodma		= AUTODMA,		\

		.enablebits	= {{0x41,0x80,0x80}}, \

		.bootable	= ON_BOARD,		\

	}



static ide_pci_device_t 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 struct pci_device_id it8213_pci_tbl[] = {

	{ PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8213,  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 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 and Alan Cox");		/* Update this */

MODULE_DESCRIPTION("PCI driver module for the ITE 8213");

MODULE_LICENSE("GPL");