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Commit 95ba8c17 authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz
Browse files

alim15x3: backport short cables support from pata_ali.c 



Backport short cables support from pata_ali.c and while at it cleanup
existing cable detection code.

This patch should allow UDMA > 2 modes on HP Pavilion N5430 and Fujitsu P2000.

Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: default avatarSergei Shtylyov <sshtylyov@ru.mvista.com>
parent 7207626f

drivers/ide/pci/alim15x3.c

+48 −23
Original line number Diff line number Diff line 
/*

 * linux/drivers/ide/pci/alim15x3.c		Version 0.21	2007/02/03

 * linux/drivers/ide/pci/alim15x3.c		Version 0.25	Jun 9 2007

 *

 *  Copyright (C) 1998-2000 Michel Aubry, Maintainer

 *  Copyright (C) 1998-2000 Andrzej Krzysztofowicz, Maintainer
@@ -10,6 +10,7 @@ 
 *  Copyright (C) 2002 Alan Cox <alan@redhat.com>

 *  ALi (now ULi M5228) support by Clear Zhang <Clear.Zhang@ali.com.tw>

 *  Copyright (C) 2007 MontaVista Software, Inc. <source@mvista.com>

 *  Copyright (C) 2007 Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

 *

 *  (U)DMA capable version of ali 1533/1543(C), 1535(D)

 *
@@ -36,6 +37,7 @@ 
#include <linux/hdreg.h>

#include <linux/ide.h>

#include <linux/init.h>

#include <linux/dmi.h>



#include <asm/io.h>
@@ -583,6 +585,35 @@ static unsigned int __devinit init_chipset_ali15x3 (struct pci_dev *dev, const c 
	return 0;

}



/*

 *	Cable special cases

 */



static struct dmi_system_id cable_dmi_table[] = {

	{

		.ident = "HP Pavilion N5430",

		.matches = {

			DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),

			DMI_MATCH(DMI_BOARD_NAME, "OmniBook N32N-736"),

		},

	},

	{ }

};



static int ali_cable_override(struct pci_dev *pdev)

{

	/* Fujitsu P2000 */

	if (pdev->subsystem_vendor == 0x10CF &&

	    pdev->subsystem_device == 0x10AF)

		return 1;



	/* Systems by DMI */

	if (dmi_check_system(cable_dmi_table))

		return 1;



	return 0;

}



/**

 *	ata66_ali15x3	-	check for UDMA 66 support

 *	@hwif: IDE interface
@@ -597,34 +628,28 @@ static unsigned int __devinit init_chipset_ali15x3 (struct pci_dev *dev, const c 
static u8 __devinit ata66_ali15x3(ide_hwif_t *hwif)

{

	struct pci_dev *dev	= hwif->pci_dev;

	unsigned int ata66	= 0;

	u8 cable_80_pin[2]	= { 0, 0 };



	unsigned long flags;

	u8 tmpbyte;

	u8 cbl = ATA_CBL_PATA40, tmpbyte;



	local_irq_save(flags);



	if (m5229_revision >= 0xC2) {

		/*

		 * Ultra66 cable detection (from Host View)

		 * m5229, 0x4a, bit0: primary, bit1: secondary 80 pin

		 * m5229 80-pin cable detection (from Host View)

		 *

		 * 0x4a bit0 is 0 => primary channel has 80-pin

		 * 0x4a bit1 is 0 => secondary channel has 80-pin

		 *

		 * Certain laptops use short but suitable cables

		 * and don't implement the detect logic.

		 */

		if (ali_cable_override(dev))

			cbl = ATA_CBL_PATA40_SHORT;

		else {

			pci_read_config_byte(dev, 0x4a, &tmpbyte);

		/*

		 * 0x4a, bit0 is 0 => primary channel

		 * has 80-pin (from host view)

		 */

		if (!(tmpbyte & 0x01)) cable_80_pin[0] = 1;

		/*

		 * 0x4a, bit1 is 0 => secondary channel

		 * has 80-pin (from host view)

		 */

		if (!(tmpbyte & 0x02)) cable_80_pin[1] = 1;

		/*

		 * Allow ata66 if cable of current channel has 80 pins

		 */

		ata66 = (hwif->channel)?cable_80_pin[1]:cable_80_pin[0];

			if ((tmpbyte & (1 << hwif->channel)) == 0)

				cbl = ATA_CBL_PATA80;

		}

	} else {

		/*

		 * check m1533, 0x5e, bit 1~4 == 1001 => & 00011110 = 00010010
@@ -657,7 +682,7 @@ static u8 __devinit ata66_ali15x3(ide_hwif_t *hwif) 


	local_irq_restore(flags);



	return ata66 ? ATA_CBL_PATA80 : ATA_CBL_PATA40;

	return cbl;

}



/**