Commit bbb3bbdb authored by Alan Cox's avatar Alan Cox Committed by Linus Torvalds
Browse files

[PATCH] non-libata driver for Jmicron devices 



Less functional than libata this just uses the merged interface provided for
dumb legacy OS's.  This is basically a bridge for people not yet ready to use
libata for some reason or another.

Port visibility is entirely dependant on the BIOS setup.

Signed-off-by: default avatarAlan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent ce164428

drivers/ide/Kconfig

+6 −0
Original line number Diff line number Diff line
@@ -594,6 +594,12 @@ config BLK_DEV_HPT366 
	  ide-probe at boot. It is reported to support DVD II drives, by the

	  manufacturer.



config BLK_DEV_JMICRON

	tristate "JMicron JMB36x support"

	help

	  Basic support for the JMicron ATA controllers. For full support

	  use the libata drivers.



config BLK_DEV_SC1200

	tristate "National SCx200 chipset support"

	help

drivers/ide/pci/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ obj-$(CONFIG_BLK_DEV_HPT366) += hpt366.o 
#obj-$(CONFIG_BLK_DEV_HPT37X)		+= hpt37x.o

obj-$(CONFIG_BLK_DEV_IT8172)		+= it8172.o

obj-$(CONFIG_BLK_DEV_IT821X)		+= it821x.o

obj-$(CONFIG_BLK_DEV_JMICRON)		+= jmicron.o

obj-$(CONFIG_BLK_DEV_NS87415)		+= ns87415.o

obj-$(CONFIG_BLK_DEV_OPTI621)		+= opti621.o

obj-$(CONFIG_BLK_DEV_PDC202XX_OLD)	+= pdc202xx_old.o

drivers/ide/pci/jmicron.c

0 → 100644
+269 −0
Original line number Diff line number Diff line 


/*

 * Copyright (C) 2006		Red Hat <alan@redhat.com>

 *

 *  May be copied or modified under the terms of the GNU General Public License

 */



#include <linux/config.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>



typedef enum {

	PORT_PATA0 = 0,

	PORT_PATA1 = 1,

	PORT_SATA = 2,

} port_type;



/**

 *	jmicron_ratemask	-	Compute available modes

 *	@drive: IDE drive

 *

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

 *	is all modes to ATA133 clipped by drive cable setup.

 */



static u8 jmicron_ratemask(ide_drive_t *drive)

{

	u8 mode	= 4;

	if (!eighty_ninty_three(drive))

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

	return mode;

}



/**

 *	ata66_jmicron		-	Cable check

 *	@hwif: IDE port

 *

 *	Return 1 if the cable is 80pin

 */



static int __devinit ata66_jmicron(ide_hwif_t *hwif)

{

	struct pci_dev *pdev = hwif->pci_dev;



	u32 control;

	u32 control5;



	int port = hwif->channel;

	port_type port_map[2];



	pci_read_config_dword(pdev, 0x40, &control);



	/* There are two basic mappings. One has the two SATA ports merged

	   as master/slave and the secondary as PATA, the other has only the

	   SATA port mapped */

	if (control & (1 << 23)) {

		port_map[0] = PORT_SATA;

		port_map[1] = PORT_PATA0;

	} else {

		port_map[0] = PORT_SATA;

		port_map[1] = PORT_SATA;

	}



	/* The 365/366 may have this bit set to map the second PATA port

	   as the internal primary channel */

	pci_read_config_dword(pdev, 0x80, &control5);

	if (control5 & (1<<24))

		port_map[0] = PORT_PATA1;



	/* The two ports may then be logically swapped by the firmware */

	if (control & (1 << 22))

		port = port ^ 1;



	/*

	 *	Now we know which physical port we are talking about we can

	 *	actually do our cable checking etc. Thankfully we don't need

	 *	to do the plumbing for other cases.

	 */

	switch (port_map[port])

	{

	case PORT_PATA0:

		if (control & (1 << 3))	/* 40/80 pin primary */

			return 1;

		return 0;

	case PORT_PATA1:

		if (control5 & (1 << 19))	/* 40/80 pin secondary */

			return 0;

		return 1;

	case PORT_SATA:

		return 1;

	}

}



static void jmicron_tuneproc (ide_drive_t *drive, byte mode_wanted)

{

	return;

}



/**

 *	config_jmicron_chipset_for_pio	-	set drive timings

 *	@drive: drive to tune

 *	@speed we want

 *

 */



static void config_jmicron_chipset_for_pio (ide_drive_t *drive, byte set_speed)

{

	u8 speed = XFER_PIO_0 + ide_get_best_pio_mode(drive, 255, 5, NULL);

	if (set_speed)

		(void) ide_config_drive_speed(drive, speed);

}



/**

 *	jmicron_tune_chipset	-	set controller timings

 *	@drive: Drive to set up

 *	@xferspeed: speed we want to achieve

 *

 *	As the JMicron snoops for timings all we actually need to do is

 *	make sure we don't set an invalid mode. We do need to honour

 *	the cable detect here.

 */



static int jmicron_tune_chipset (ide_drive_t *drive, byte xferspeed)

{



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



	return ide_config_drive_speed(drive, speed);

}



/**

 *	config_chipset_for_dma	-	configure for DMA

 *	@drive: drive to configure

 *

 *	As the JMicron snoops for timings all we actually need to do is

 *	make sure we don't set an invalid mode.

 */



static int config_chipset_for_dma (ide_drive_t *drive)

{

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



	config_jmicron_chipset_for_pio(drive, !speed);

	jmicron_tune_chipset(drive, speed);

	return ide_dma_enable(drive);

}



/**

 *	jmicron_configure_drive_for_dma	-	set up for DMA transfers

 *	@drive: drive we are going to set up

 *

 *	As the JMicron snoops for timings all we actually need to do is

 *	make sure we don't set an invalid mode.

 */



static int jmicron_config_drive_for_dma (ide_drive_t *drive)

{

	ide_hwif_t *hwif	= drive->hwif;



	if (ide_use_dma(drive)) {

		if (config_chipset_for_dma(drive))

			return hwif->ide_dma_on(drive);

	}

	config_jmicron_chipset_for_pio(drive, 1);

	return hwif->ide_dma_off_quietly(drive);

}



/**

 *	init_hwif_jmicron	-	set up hwif structs

 *	@hwif: interface to set up

 *

 *	Minimal set up is required for the Jmicron hardware.

 */



static void __devinit init_hwif_jmicron(ide_hwif_t *hwif)

{

	hwif->speedproc = &jmicron_tune_chipset;

	hwif->tuneproc	= &jmicron_tuneproc;



	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->ide_dma_check = &jmicron_config_drive_for_dma;

	if (!(hwif->udma_four))

		hwif->udma_four = ata66_jmicron(hwif);



	hwif->autodma = 1;

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

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

	return;

fallback:

	hwif->autodma = 0;

	return;

}



#define DECLARE_JMB_DEV(name_str)			\

	{						\

		.name		= name_str,		\

		.init_hwif	= init_hwif_jmicron,	\

		.channels	= 2,			\

		.autodma	= AUTODMA,		\

		.bootable	= ON_BOARD,		\

		.enablebits	= { {0x40, 1, 1}, {0x40, 0x10, 0x10} }, \

	}



static ide_pci_device_t jmicron_chipsets[] __devinitdata = {

	/* 0 */ DECLARE_JMB_DEV("JMB361"),

	/* 1 */ DECLARE_JMB_DEV("JMB363"),

	/* 2 */ DECLARE_JMB_DEV("JMB365"),

	/* 3 */ DECLARE_JMB_DEV("JMB366"),

	/* 4 */ DECLARE_JMB_DEV("JMB368"),

};



/**

 *	jmicron_init_one	-	pci layer discovery entry

 *	@dev: PCI device

 *	@id: ident table entry

 *

 *	Called by the PCI code when it finds a Jmicron controller.

 *	We then use the IDE PCI generic helper to do most of the work.

 */



static int __devinit jmicron_init_one(struct pci_dev *dev, const struct pci_device_id *id)

{

	ide_setup_pci_device(dev, &jmicron_chipsets[id->driver_data]);

	return 0;

}



static struct pci_device_id jmicron_pci_tbl[] = {

	{ PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361), 0},

	{ PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363), 1},

	{ PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365), 2},

	{ PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366), 3},

	{ PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368), 4},

	{ 0, },

};



MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);



static struct pci_driver driver = {

	.name		= "JMicron IDE",

	.id_table	= jmicron_pci_tbl,

	.probe		= jmicron_init_one,

};



static int __init jmicron_ide_init(void)

{

	return ide_pci_register_driver(&driver);

}



module_init(jmicron_ide_init);



MODULE_AUTHOR("Alan Cox");

MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes");

MODULE_LICENSE("GPL");