Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 913 insertions, 0 deletions

diff --git a/drivers/ide/pci/alim15x3.c b/drivers/ide/pci/alim15x3.c
new file mode 100644
index 000000000000..67efb38a9f6c
--- /dev/null
+++ b/drivers/ide/pci/alim15x3.c
@@ -0,0 +1,913 @@
+/*
+ * linux/drivers/ide/pci/alim15x3.c		Version 0.17	2003/01/02
+ *
+ *  Copyright (C) 1998-2000 Michel Aubry, Maintainer
+ *  Copyright (C) 1998-2000 Andrzej Krzysztofowicz, Maintainer
+ *  Copyright (C) 1999-2000 CJ, cjtsai@ali.com.tw, Maintainer
+ *
+ *  Copyright (C) 1998-2000 Andre Hedrick (andre@linux-ide.org)
+ *  May be copied or modified under the terms of the GNU General Public License
+ *  Copyright (C) 2002 Alan Cox <alan@redhat.com>
+ *  ALi (now ULi M5228) support by Clear Zhang <Clear.Zhang@ali.com.tw>
+ *
+ *  (U)DMA capable version of ali 1533/1543(C), 1535(D)
+ *
+ **********************************************************************
+ *  9/7/99 --Parts from the above author are included and need to be
+ *  converted into standard interface, once I finish the thought.
+ *
+ *  Recent changes
+ *	Don't use LBA48 mode on ALi <= 0xC4
+ *	Don't poke 0x79 with a non ALi northbridge
+ *	Don't flip undefined bits on newer chipsets (fix Fujitsu laptop hang)
+ *	Allow UDMA6 on revisions > 0xC4
+ *
+ *  Documentation
+ *	Chipset documentation available under NDA only
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.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>
+
+#define DISPLAY_ALI_TIMINGS
+
+/*
+ *	ALi devices are not plug in. Otherwise these static values would
+ *	need to go. They ought to go away anyway
+ */
+ 
+static u8 m5229_revision;
+static u8 chip_is_1543c_e;
+static struct pci_dev *isa_dev;
+
+#if defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_PROC_FS)
+#include <linux/stat.h>
+#include <linux/proc_fs.h>
+
+static u8 ali_proc = 0;
+
+static struct pci_dev *bmide_dev;
+
+static char *fifo[4] = {
+	"FIFO Off",
+	"FIFO On ",
+	"DMA mode",
+	"PIO mode" };
+
+static char *udmaT[8] = {
+	"1.5T",
+	"  2T",
+	"2.5T",
+	"  3T",
+	"3.5T",
+	"  4T",
+	"  6T",
+	"  8T"
+};
+
+static char *channel_status[8] = {
+	"OK            ",
+	"busy          ",
+	"DRQ           ",
+	"DRQ busy      ",
+	"error         ",
+	"error busy    ",
+	"error DRQ     ",
+	"error DRQ busy"
+};
+
+/**
+ *	ali_get_info		-	generate proc file for ALi IDE
+ *	@buffer: buffer to fill
+ *	@addr: address of user start in buffer
+ *	@offset: offset into 'file'
+ *	@count: buffer count
+ *
+ *	Walks the Ali devices and outputs summary data on the tuning and
+ *	anything else that will help with debugging
+ */
+ 
+static int ali_get_info (char *buffer, char **addr, off_t offset, int count)
+{
+	unsigned long bibma;
+	u8 reg53h, reg5xh, reg5yh, reg5xh1, reg5yh1, c0, c1, rev, tmp;
+	char *q, *p = buffer;
+
+	/* fetch rev. */
+	pci_read_config_byte(bmide_dev, 0x08, &rev);
+	if (rev >= 0xc1)	/* M1543C or newer */
+		udmaT[7] = " ???";
+	else
+		fifo[3]  = "   ???  ";
+
+	/* first fetch bibma: */
+	
+	bibma = pci_resource_start(bmide_dev, 4);
+
+	/*
+	 * at that point bibma+0x2 et bibma+0xa are byte
+	 * registers to investigate:
+	 */
+	c0 = inb(bibma + 0x02);
+	c1 = inb(bibma + 0x0a);
+
+	p += sprintf(p,
+		"\n                                Ali M15x3 Chipset.\n");
+	p += sprintf(p,
+		"                                ------------------\n");
+	pci_read_config_byte(bmide_dev, 0x78, &reg53h);
+	p += sprintf(p, "PCI Clock: %d.\n", reg53h);
+
+	pci_read_config_byte(bmide_dev, 0x53, &reg53h);
+	p += sprintf(p,
+		"CD_ROM FIFO:%s, CD_ROM DMA:%s\n",
+		(reg53h & 0x02) ? "Yes" : "No ",
+		(reg53h & 0x01) ? "Yes" : "No " );
+	pci_read_config_byte(bmide_dev, 0x74, &reg53h);
+	p += sprintf(p,
+		"FIFO Status: contains %d Words, runs%s%s\n\n",
+		(reg53h & 0x3f),
+		(reg53h & 0x40) ? " OVERWR" : "",
+		(reg53h & 0x80) ? " OVERRD." : "." );
+
+	p += sprintf(p,
+		"-------------------primary channel"
+		"-------------------secondary channel"
+		"---------\n\n");
+
+	pci_read_config_byte(bmide_dev, 0x09, &reg53h);
+	p += sprintf(p,
+		"channel status:       %s"
+		"                               %s\n",
+		(reg53h & 0x20) ? "On " : "Off",
+		(reg53h & 0x10) ? "On " : "Off" );
+
+	p += sprintf(p,
+		"both channels togth:  %s"
+		"                               %s\n",
+		(c0&0x80) ? "No " : "Yes",
+		(c1&0x80) ? "No " : "Yes" );
+
+	pci_read_config_byte(bmide_dev, 0x76, &reg53h);
+	p += sprintf(p,
+		"Channel state:        %s                    %s\n",
+		channel_status[reg53h & 0x07],
+		channel_status[(reg53h & 0x70) >> 4] );
+
+	pci_read_config_byte(bmide_dev, 0x58, &reg5xh);
+	pci_read_config_byte(bmide_dev, 0x5c, &reg5yh);
+	p += sprintf(p,
+		"Add. Setup Timing:    %dT"
+		"                                %dT\n",
+		(reg5xh & 0x07) ? (reg5xh & 0x07) : 8,
+		(reg5yh & 0x07) ? (reg5yh & 0x07) : 8 );
+
+	pci_read_config_byte(bmide_dev, 0x59, &reg5xh);
+	pci_read_config_byte(bmide_dev, 0x5d, &reg5yh);
+	p += sprintf(p,
+		"Command Act. Count:   %dT"
+		"                                %dT\n"
+		"Command Rec. Count:   %dT"
+		"                               %dT\n\n",
+		(reg5xh & 0x70) ? ((reg5xh & 0x70) >> 4) : 8,
+		(reg5yh & 0x70) ? ((reg5yh & 0x70) >> 4) : 8, 
+		(reg5xh & 0x0f) ? (reg5xh & 0x0f) : 16,
+		(reg5yh & 0x0f) ? (reg5yh & 0x0f) : 16 );
+
+	p += sprintf(p,
+		"----------------drive0-----------drive1"
+		"------------drive0-----------drive1------\n\n");
+	p += sprintf(p,
+		"DMA enabled:      %s              %s"
+		"               %s              %s\n",
+		(c0&0x20) ? "Yes" : "No ",
+		(c0&0x40) ? "Yes" : "No ",
+		(c1&0x20) ? "Yes" : "No ",
+		(c1&0x40) ? "Yes" : "No " );
+
+	pci_read_config_byte(bmide_dev, 0x54, &reg5xh);
+	pci_read_config_byte(bmide_dev, 0x55, &reg5yh);
+	q = "FIFO threshold:   %2d Words         %2d Words"
+		"          %2d Words         %2d Words\n";
+	if (rev < 0xc1) {
+		if ((rev == 0x20) &&
+		    (pci_read_config_byte(bmide_dev, 0x4f, &tmp), (tmp &= 0x20))) {
+			p += sprintf(p, q, 8, 8, 8, 8);
+		} else {
+			p += sprintf(p, q,
+				(reg5xh & 0x03) + 12,
+				((reg5xh & 0x30)>>4) + 12,
+				(reg5yh & 0x03) + 12,
+				((reg5yh & 0x30)>>4) + 12 );
+		}
+	} else {
+		int t1 = (tmp = (reg5xh & 0x03)) ? (tmp << 3) : 4;
+		int t2 = (tmp = ((reg5xh & 0x30)>>4)) ? (tmp << 3) : 4;
+		int t3 = (tmp = (reg5yh & 0x03)) ? (tmp << 3) : 4;
+		int t4 = (tmp = ((reg5yh & 0x30)>>4)) ? (tmp << 3) : 4;
+		p += sprintf(p, q, t1, t2, t3, t4);
+	}
+
+#if 0
+	p += sprintf(p, 
+		"FIFO threshold:   %2d Words         %2d Words"
+		"          %2d Words         %2d Words\n",
+		(reg5xh & 0x03) + 12,
+		((reg5xh & 0x30)>>4) + 12,
+		(reg5yh & 0x03) + 12,
+		((reg5yh & 0x30)>>4) + 12 );
+#endif
+
+	p += sprintf(p,
+		"FIFO mode:        %s         %s          %s         %s\n",
+		fifo[((reg5xh & 0x0c) >> 2)],
+		fifo[((reg5xh & 0xc0) >> 6)],
+		fifo[((reg5yh & 0x0c) >> 2)],
+		fifo[((reg5yh & 0xc0) >> 6)] );
+
+	pci_read_config_byte(bmide_dev, 0x5a, &reg5xh);
+	pci_read_config_byte(bmide_dev, 0x5b, &reg5xh1);
+	pci_read_config_byte(bmide_dev, 0x5e, &reg5yh);
+	pci_read_config_byte(bmide_dev, 0x5f, &reg5yh1);
+
+	p += sprintf(p,/*
+		"------------------drive0-----------drive1"
+		"------------drive0-----------drive1------\n")*/
+		"Dt RW act. Cnt    %2dT              %2dT"
+		"               %2dT              %2dT\n"
+		"Dt RW rec. Cnt    %2dT              %2dT"
+		"               %2dT              %2dT\n\n",
+		(reg5xh & 0x70) ? ((reg5xh & 0x70) >> 4) : 8,
+		(reg5xh1 & 0x70) ? ((reg5xh1 & 0x70) >> 4) : 8,
+		(reg5yh & 0x70) ? ((reg5yh & 0x70) >> 4) : 8,
+		(reg5yh1 & 0x70) ? ((reg5yh1 & 0x70) >> 4) : 8,
+		(reg5xh & 0x0f) ? (reg5xh & 0x0f) : 16,
+		(reg5xh1 & 0x0f) ? (reg5xh1 & 0x0f) : 16,
+		(reg5yh & 0x0f) ? (reg5yh & 0x0f) : 16,
+		(reg5yh1 & 0x0f) ? (reg5yh1 & 0x0f) : 16 );
+
+	p += sprintf(p,
+		"-----------------------------------UDMA Timings"
+		"--------------------------------\n\n");
+
+	pci_read_config_byte(bmide_dev, 0x56, &reg5xh);
+	pci_read_config_byte(bmide_dev, 0x57, &reg5yh);
+	p += sprintf(p,
+		"UDMA:             %s               %s"
+		"                %s               %s\n"
+		"UDMA timings:     %s             %s"
+		"              %s             %s\n\n",
+		(reg5xh & 0x08) ? "OK" : "No",
+		(reg5xh & 0x80) ? "OK" : "No",
+		(reg5yh & 0x08) ? "OK" : "No",
+		(reg5yh & 0x80) ? "OK" : "No",
+		udmaT[(reg5xh & 0x07)],
+		udmaT[(reg5xh & 0x70) >> 4],
+		udmaT[reg5yh & 0x07],
+		udmaT[(reg5yh & 0x70) >> 4] );
+
+	return p-buffer; /* => must be less than 4k! */
+}
+#endif  /* defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_PROC_FS) */
+
+/**
+ *	ali15x3_tune_drive	-	set up a drive
+ *	@drive: drive to tune
+ *	@pio: unused
+ *
+ *	Select the best PIO timing for the drive in question. Then
+ *	program the controller for this drive set up
+ */
+ 
+static void ali15x3_tune_drive (ide_drive_t *drive, u8 pio)
+{
+	ide_pio_data_t d;
+	ide_hwif_t *hwif = HWIF(drive);
+	struct pci_dev *dev = hwif->pci_dev;
+	int s_time, a_time, c_time;
+	u8 s_clc, a_clc, r_clc;
+	unsigned long flags;
+	int bus_speed = system_bus_clock();
+	int port = hwif->channel ? 0x5c : 0x58;
+	int portFIFO = hwif->channel ? 0x55 : 0x54;
+	u8 cd_dma_fifo = 0;
+	int unit = drive->select.b.unit & 1;
+
+	pio = ide_get_best_pio_mode(drive, pio, 5, &d);
+	s_time = ide_pio_timings[pio].setup_time;
+	a_time = ide_pio_timings[pio].active_time;
+	if ((s_clc = (s_time * bus_speed + 999) / 1000) >= 8)
+		s_clc = 0;
+	if ((a_clc = (a_time * bus_speed + 999) / 1000) >= 8)
+		a_clc = 0;
+	c_time = ide_pio_timings[pio].cycle_time;
+
+#if 0
+	if ((r_clc = ((c_time - s_time - a_time) * bus_speed + 999) / 1000) >= 16)
+		r_clc = 0;
+#endif
+
+	if (!(r_clc = (c_time * bus_speed + 999) / 1000 - a_clc - s_clc)) {
+		r_clc = 1;
+	} else {
+		if (r_clc >= 16)
+			r_clc = 0;
+	}
+	local_irq_save(flags);
+	
+	/* 
+	 * PIO mode => ATA FIFO on, ATAPI FIFO off
+	 */
+	pci_read_config_byte(dev, portFIFO, &cd_dma_fifo);
+	if (drive->media==ide_disk) {
+		if (unit) {
+			pci_write_config_byte(dev, portFIFO, (cd_dma_fifo & 0x0F) | 0x50);
+		} else {
+			pci_write_config_byte(dev, portFIFO, (cd_dma_fifo & 0xF0) | 0x05);
+		}
+	} else {
+		if (unit) {
+			pci_write_config_byte(dev, portFIFO, cd_dma_fifo & 0x0F);
+		} else {
+			pci_write_config_byte(dev, portFIFO, cd_dma_fifo & 0xF0);
+		}
+	}
+	
+	pci_write_config_byte(dev, port, s_clc);
+	pci_write_config_byte(dev, port+drive->select.b.unit+2, (a_clc << 4) | r_clc);
+	local_irq_restore(flags);
+
+	/*
+	 * setup   active  rec
+	 * { 70,   165,    365 },   PIO Mode 0
+	 * { 50,   125,    208 },   PIO Mode 1
+	 * { 30,   100,    110 },   PIO Mode 2
+	 * { 30,   80,     70  },   PIO Mode 3 with IORDY
+	 * { 25,   70,     25  },   PIO Mode 4 with IORDY  ns
+	 * { 20,   50,     30  }    PIO Mode 5 with IORDY (nonstandard)
+	 */
+
+}
+
+/**
+ *	ali15x3_can_ultra	-	check for ultra DMA support
+ *	@drive: drive to do the check
+ *
+ *	Check the drive and controller revisions. Return 0 if UDMA is
+ *	not available, or 1 if UDMA can be used. The actual rules for
+ *	the ALi are
+ *		No UDMA on revisions <= 0x20
+ *		Disk only for revisions < 0xC2
+ *		Not WDC drives for revisions < 0xC2
+ *
+ *	FIXME: WDC ifdef needs to die
+ */
+ 
+static u8 ali15x3_can_ultra (ide_drive_t *drive)
+{
+#ifndef CONFIG_WDC_ALI15X3
+	struct hd_driveid *id	= drive->id;
+#endif /* CONFIG_WDC_ALI15X3 */
+
+	if (m5229_revision <= 0x20) {
+		return 0;
+	} else if ((m5229_revision < 0xC2) &&
+#ifndef CONFIG_WDC_ALI15X3
+		   ((chip_is_1543c_e && strstr(id->model, "WDC ")) ||
+		    (drive->media!=ide_disk))) {
+#else /* CONFIG_WDC_ALI15X3 */
+		   (drive->media!=ide_disk)) {
+#endif /* CONFIG_WDC_ALI15X3 */
+		return 0;
+	} else {
+		return 1;
+	}
+}
+
+/**
+ *	ali15x3_ratemask	-	generate DMA mode list
+ *	@drive: drive to compute against
+ *
+ *	Generate a list of the available DMA modes for the drive. 
+ *	FIXME: this function contains lots of bogus masking we can dump
+ *
+ *	Return the highest available mode (UDMA33, UDMA66, UDMA100,..)
+ */
+ 
+static u8 ali15x3_ratemask (ide_drive_t *drive)
+{
+	u8 mode = 0, can_ultra	= ali15x3_can_ultra(drive);
+
+	if (m5229_revision > 0xC4 && can_ultra) {
+		mode = 4;
+	} else if (m5229_revision == 0xC4 && can_ultra) {
+		mode = 3;
+	} else if (m5229_revision >= 0xC2 && can_ultra) {
+		mode = 2;
+	} else if (can_ultra) {
+		return 1;
+	} else {
+		return 0;
+	}
+
+	/*
+	 *	If the drive sees no suitable cable then UDMA 33
+	 *	is the highest permitted mode
+	 */
+	 
+	if (!eighty_ninty_three(drive))
+		mode = min(mode, (u8)1);
+	return mode;
+}
+
+/**
+ *	ali15x3_tune_chipset	-	set up chiset for new speed
+ *	@drive: drive to configure for
+ *	@xferspeed: desired speed
+ *
+ *	Configure the hardware for the desired IDE transfer mode.
+ *	We also do the needed drive configuration through helpers
+ */
+ 
+static int ali15x3_tune_chipset (ide_drive_t *drive, u8 xferspeed)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	struct pci_dev *dev	= hwif->pci_dev;
+	u8 speed		= ide_rate_filter(ali15x3_ratemask(drive), xferspeed);
+	u8 speed1		= speed;
+	u8 unit			= (drive->select.b.unit & 0x01);
+	u8 tmpbyte		= 0x00;
+	int m5229_udma		= (hwif->channel) ? 0x57 : 0x56;
+
+	if (speed == XFER_UDMA_6)
+		speed1 = 0x47;
+
+	if (speed < XFER_UDMA_0) {
+		u8 ultra_enable	= (unit) ? 0x7f : 0xf7;
+		/*
+		 * clear "ultra enable" bit
+		 */
+		pci_read_config_byte(dev, m5229_udma, &tmpbyte);
+		tmpbyte &= ultra_enable;
+		pci_write_config_byte(dev, m5229_udma, tmpbyte);
+
+		if (speed < XFER_SW_DMA_0)
+			ali15x3_tune_drive(drive, speed);
+	} else {
+		pci_read_config_byte(dev, m5229_udma, &tmpbyte);
+		tmpbyte &= (0x0f << ((1-unit) << 2));
+		/*
+		 * enable ultra dma and set timing
+		 */
+		tmpbyte |= ((0x08 | ((4-speed1)&0x07)) << (unit << 2));
+		pci_write_config_byte(dev, m5229_udma, tmpbyte);
+		if (speed >= XFER_UDMA_3) {
+			pci_read_config_byte(dev, 0x4b, &tmpbyte);
+			tmpbyte |= 1;
+			pci_write_config_byte(dev, 0x4b, tmpbyte);
+		}
+	}
+	return (ide_config_drive_speed(drive, speed));
+}
+
+
+/**
+ *	config_chipset_for_dma	-	set up DMA mode
+ *	@drive: drive to configure for
+ *
+ *	Place a drive into DMA mode and tune the chipset for
+ *	the selected speed.
+ *
+ *	Returns true if DMA mode can be used
+ */
+ 
+static int config_chipset_for_dma (ide_drive_t *drive)
+{
+	u8 speed = ide_dma_speed(drive, ali15x3_ratemask(drive));
+
+	if (!(speed))
+		return 0;
+
+	(void) ali15x3_tune_chipset(drive, speed);
+	return ide_dma_enable(drive);
+}
+
+/**
+ *	ali15x3_config_drive_for_dma	-	configure for DMA
+ *	@drive: drive to configure
+ *
+ *	Configure a drive for DMA operation. If DMA is not possible we
+ *	drop the drive into PIO mode instead.
+ *
+ *	FIXME: exactly what are we trying to return here
+ */
+ 
+static int ali15x3_config_drive_for_dma(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	struct hd_driveid *id	= drive->id;
+
+	if ((m5229_revision<=0x20) && (drive->media!=ide_disk))
+		return hwif->ide_dma_off_quietly(drive);
+
+	drive->init_speed = 0;
+
+	if ((id != NULL) && ((id->capability & 1) != 0) && drive->autodma) {
+		/* Consult the list of known "bad" drives */
+		if (__ide_dma_bad_drive(drive))
+			goto ata_pio;
+		if ((id->field_valid & 4) && (m5229_revision >= 0xC2)) {
+			if (id->dma_ultra & hwif->ultra_mask) {
+				/* Force if Capable UltraDMA */
+				int dma = config_chipset_for_dma(drive);
+				if ((id->field_valid & 2) && !dma)
+					goto try_dma_modes;
+			}
+		} else if (id->field_valid & 2) {
+try_dma_modes:
+			if ((id->dma_mword & hwif->mwdma_mask) ||
+			    (id->dma_1word & hwif->swdma_mask)) {
+				/* Force if Capable regular DMA modes */
+				if (!config_chipset_for_dma(drive))
+					goto no_dma_set;
+			}
+		} else if (__ide_dma_good_drive(drive) &&
+			   (id->eide_dma_time < 150)) {
+			/* Consult the list of known "good" drives */
+			if (!config_chipset_for_dma(drive))
+				goto no_dma_set;
+		} else {
+			goto ata_pio;
+		}
+	} else {
+ata_pio:
+		hwif->tuneproc(drive, 255);
+no_dma_set:
+		return hwif->ide_dma_off_quietly(drive);
+	}
+	return hwif->ide_dma_on(drive);
+}
+
+/**
+ *	ali15x3_dma_setup	-	begin a DMA phase
+ *	@drive:	target device
+ *
+ *	Returns 1 if the DMA cannot be performed, zero on success.
+ */
+
+static int ali15x3_dma_setup(ide_drive_t *drive)
+{
+	if (m5229_revision < 0xC2 && drive->media != ide_disk) {
+		if (rq_data_dir(drive->hwif->hwgroup->rq))
+			return 1;	/* try PIO instead of DMA */
+	}
+	return ide_dma_setup(drive);
+}
+
+/**
+ *	init_chipset_ali15x3	-	Initialise an ALi IDE controller
+ *	@dev: PCI device
+ *	@name: Name of the controller
+ *
+ *	This function initializes the ALI IDE controller and where 
+ *	appropriate also sets up the 1533 southbridge.
+ */
+  
+static unsigned int __init init_chipset_ali15x3 (struct pci_dev *dev, const char *name)
+{
+	unsigned long flags;
+	u8 tmpbyte;
+	struct pci_dev *north = pci_find_slot(0, PCI_DEVFN(0,0));
+
+	pci_read_config_byte(dev, PCI_REVISION_ID, &m5229_revision);
+
+	isa_dev = pci_find_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
+
+#if defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_PROC_FS)
+	if (!ali_proc) {
+		ali_proc = 1;
+		bmide_dev = dev;
+		ide_pci_create_host_proc("ali", ali_get_info);
+	}
+#endif  /* defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_PROC_FS) */
+
+	local_irq_save(flags);
+
+	if (m5229_revision < 0xC2) {
+		/*
+		 * revision 0x20 (1543-E, 1543-F)
+		 * revision 0xC0, 0xC1 (1543C-C, 1543C-D, 1543C-E)
+		 * clear CD-ROM DMA write bit, m5229, 0x4b, bit 7
+		 */
+		pci_read_config_byte(dev, 0x4b, &tmpbyte);
+		/*
+		 * clear bit 7
+		 */
+		pci_write_config_byte(dev, 0x4b, tmpbyte & 0x7F);
+		local_irq_restore(flags);
+		return 0;
+	}
+
+	/*
+	 * 1543C-B?, 1535, 1535D, 1553
+	 * Note 1: not all "motherboard" support this detection
+	 * Note 2: if no udma 66 device, the detection may "error".
+	 *         but in this case, we will not set the device to
+	 *         ultra 66, the detection result is not important
+	 */
+
+	/*
+	 * enable "Cable Detection", m5229, 0x4b, bit3
+	 */
+	pci_read_config_byte(dev, 0x4b, &tmpbyte);
+	pci_write_config_byte(dev, 0x4b, tmpbyte | 0x08);
+
+	/*
+	 * We should only tune the 1533 enable if we are using an ALi
+	 * North bridge. We might have no north found on some zany
+	 * box without a device at 0:0.0. The ALi bridge will be at
+	 * 0:0.0 so if we didn't find one we know what is cooking.
+	 */
+	if (north && north->vendor != PCI_VENDOR_ID_AL) {
+		local_irq_restore(flags);
+	        return 0;
+	}
+
+	if (m5229_revision < 0xC5 && isa_dev)
+	{	
+		/*
+		 * set south-bridge's enable bit, m1533, 0x79
+		 */
+
+		pci_read_config_byte(isa_dev, 0x79, &tmpbyte);
+		if (m5229_revision == 0xC2) {
+			/*
+			 * 1543C-B0 (m1533, 0x79, bit 2)
+			 */
+			pci_write_config_byte(isa_dev, 0x79, tmpbyte | 0x04);
+		} else if (m5229_revision >= 0xC3) {
+			/*
+			 * 1553/1535 (m1533, 0x79, bit 1)
+			 */
+			pci_write_config_byte(isa_dev, 0x79, tmpbyte | 0x02);
+		}
+	}
+	local_irq_restore(flags);
+	return 0;
+}
+
+/**
+ *	ata66_ali15x3	-	check for UDMA 66 support
+ *	@hwif: IDE interface
+ *
+ *	This checks if the controller and the cable are capable
+ *	of UDMA66 transfers. It doesn't check the drives.
+ *	But see note 2 below!
+ *
+ *	FIXME: frobs bits that are not defined on newer ALi devicea
+ */
+
+static unsigned int __init 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;
+
+	local_irq_save(flags);
+
+	if (m5229_revision >= 0xC2) {
+		/*
+		 * Ultra66 cable detection (from Host View)
+		 * m5229, 0x4a, bit0: primary, bit1: secondary 80 pin
+		 */
+		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];
+	} else {
+		/*
+		 * check m1533, 0x5e, bit 1~4 == 1001 => & 00011110 = 00010010
+		 */
+		pci_read_config_byte(isa_dev, 0x5e, &tmpbyte);
+		chip_is_1543c_e = ((tmpbyte & 0x1e) == 0x12) ? 1: 0;
+	}
+
+	/*
+	 * CD_ROM DMA on (m5229, 0x53, bit0)
+	 *      Enable this bit even if we want to use PIO
+	 * PIO FIFO off (m5229, 0x53, bit1)
+	 *      The hardware will use 0x54h and 0x55h to control PIO FIFO
+	 *	(Not on later devices it seems)
+	 *
+	 *	0x53 changes meaning on later revs - we must no touch
+	 *	bit 1 on them. Need to check if 0x20 is the right break
+	 */
+	 
+	pci_read_config_byte(dev, 0x53, &tmpbyte);
+	
+	if(m5229_revision <= 0x20)
+		tmpbyte = (tmpbyte & (~0x02)) | 0x01;
+	else
+		tmpbyte |= 0x01;
+
+	pci_write_config_byte(dev, 0x53, tmpbyte);
+
+	local_irq_restore(flags);
+
+	return(ata66);
+}
+
+/**
+ *	init_hwif_common_ali15x3	-	Set up ALI IDE hardware
+ *	@hwif: IDE interface
+ *
+ *	Initialize the IDE structure side of the ALi 15x3 driver.
+ */
+ 
+static void __init init_hwif_common_ali15x3 (ide_hwif_t *hwif)
+{
+	hwif->autodma = 0;
+	hwif->tuneproc = &ali15x3_tune_drive;
+	hwif->speedproc = &ali15x3_tune_chipset;
+
+	/* don't use LBA48 DMA on ALi devices before rev 0xC5 */
+	hwif->no_lba48_dma = (m5229_revision <= 0xC4) ? 1 : 0;
+
+	if (!hwif->dma_base) {
+		hwif->drives[0].autotune = 1;
+		hwif->drives[1].autotune = 1;
+		return;
+	}
+
+	hwif->atapi_dma = 1;
+
+	if (m5229_revision > 0x20)
+		hwif->ultra_mask = 0x7f;
+	hwif->mwdma_mask = 0x07;
+	hwif->swdma_mask = 0x07;
+
+        if (m5229_revision >= 0x20) {
+                /*
+                 * M1543C or newer for DMAing
+                 */
+                hwif->ide_dma_check = &ali15x3_config_drive_for_dma;
+		hwif->dma_setup = &ali15x3_dma_setup;
+		if (!noautodma)
+			hwif->autodma = 1;
+		if (!(hwif->udma_four))
+			hwif->udma_four = ata66_ali15x3(hwif);
+	}
+	hwif->drives[0].autodma = hwif->autodma;
+	hwif->drives[1].autodma = hwif->autodma;
+}
+
+/**
+ *	init_hwif_ali15x3	-	Initialize the ALI IDE x86 stuff
+ *	@hwif: interface to configure
+ *
+ *	Obtain the IRQ tables for an ALi based IDE solution on the PC
+ *	class platforms. This part of the code isn't applicable to the
+ *	Sparc systems
+ */
+
+static void __init init_hwif_ali15x3 (ide_hwif_t *hwif)
+{
+	u8 ideic, inmir;
+	s8 irq_routing_table[] = { -1,  9, 3, 10, 4,  5, 7,  6,
+				      1, 11, 0, 12, 0, 14, 0, 15 };
+	int irq = -1;
+
+	if (hwif->pci_dev->device == PCI_DEVICE_ID_AL_M5229)
+		hwif->irq = hwif->channel ? 15 : 14;
+
+	if (isa_dev) {
+		/*
+		 * read IDE interface control
+		 */
+		pci_read_config_byte(isa_dev, 0x58, &ideic);
+
+		/* bit0, bit1 */
+		ideic = ideic & 0x03;
+
+		/* get IRQ for IDE Controller */
+		if ((hwif->channel && ideic == 0x03) ||
+		    (!hwif->channel && !ideic)) {
+			/*
+			 * get SIRQ1 routing table
+			 */
+			pci_read_config_byte(isa_dev, 0x44, &inmir);
+			inmir = inmir & 0x0f;
+			irq = irq_routing_table[inmir];
+		} else if (hwif->channel && !(ideic & 0x01)) {
+			/*
+			 * get SIRQ2 routing table
+			 */
+			pci_read_config_byte(isa_dev, 0x75, &inmir);
+			inmir = inmir & 0x0f;
+			irq = irq_routing_table[inmir];
+		}
+		if(irq >= 0)
+			hwif->irq = irq;
+	}
+
+	init_hwif_common_ali15x3(hwif);
+}
+
+/**
+ *	init_dma_ali15x3	-	set up DMA on ALi15x3
+ *	@hwif: IDE interface
+ *	@dmabase: DMA interface base PCI address
+ *
+ *	Set up the DMA functionality on the ALi 15x3. For the ALi
+ *	controllers this is generic so we can let the generic code do
+ *	the actual work.
+ */
+
+static void __init init_dma_ali15x3 (ide_hwif_t *hwif, unsigned long dmabase)
+{
+	if (m5229_revision < 0x20)
+		return;
+	if (!(hwif->channel))
+		hwif->OUTB(hwif->INB(dmabase+2) & 0x60, dmabase+2);
+	ide_setup_dma(hwif, dmabase, 8);
+}
+
+static ide_pci_device_t ali15x3_chipset __devinitdata = {
+	.name		= "ALI15X3",
+	.init_chipset	= init_chipset_ali15x3,
+	.init_hwif	= init_hwif_ali15x3,
+	.init_dma	= init_dma_ali15x3,
+	.channels	= 2,
+	.autodma	= AUTODMA,
+	.bootable	= ON_BOARD,
+};
+
+/**
+ *	alim15x3_init_one	-	set up an ALi15x3 IDE controller
+ *	@dev: PCI device to set up
+ *
+ *	Perform the actual set up for an ALi15x3 that has been found by the
+ *	hot plug layer.
+ */
+ 
+static int __devinit alim15x3_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	ide_pci_device_t *d = &ali15x3_chipset;
+
+	if(pci_find_device(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RS100, NULL))
+		printk(KERN_ERR "Warning: ATI Radeon IGP Northbridge is not yet fully tested.\n");
+
+#if defined(CONFIG_SPARC64)
+	d->init_hwif = init_hwif_common_ali15x3;
+#endif /* CONFIG_SPARC64 */
+	return ide_setup_pci_device(dev, d);
+}
+
+
+static struct pci_device_id alim15x3_pci_tbl[] = {
+	{ PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M5229, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+	{ PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M5228, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, alim15x3_pci_tbl);
+
+static struct pci_driver driver = {
+	.name		= "ALI15x3_IDE",
+	.id_table	= alim15x3_pci_tbl,
+	.probe		= alim15x3_init_one,
+};
+
+static int ali15x3_ide_init(void)
+{
+	return ide_pci_register_driver(&driver);
+}
+
+module_init(ali15x3_ide_init);
+
+MODULE_AUTHOR("Michael Aubry, Andrzej Krzysztofowicz, CJ, Andre Hedrick, Alan Cox");
+MODULE_DESCRIPTION("PCI driver module for ALi 15x3 IDE");
+MODULE_LICENSE("GPL");