Linux-2.6.12-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, 1133 insertions, 0 deletions

diff --git a/drivers/ide/pci/siimage.c b/drivers/ide/pci/siimage.c
new file mode 100644
index 000000000000..2b9961b88135
--- /dev/null
+++ b/drivers/ide/pci/siimage.c
@@ -0,0 +1,1133 @@
+/*
+ * linux/drivers/ide/pci/siimage.c		Version 1.07	Nov 30, 2003
+ *
+ * Copyright (C) 2001-2002	Andre Hedrick <andre@linux-ide.org>
+ * Copyright (C) 2003		Red Hat <alan@redhat.com>
+ *
+ *  May be copied or modified under the terms of the GNU General Public License
+ *
+ *  Documentation available under NDA only
+ *
+ *
+ *  FAQ Items:
+ *	If you are using Marvell SATA-IDE adapters with Maxtor drives
+ *	ensure the system is set up for ATA100/UDMA5 not UDMA6.
+ *
+ *	If you are using WD drives with SATA bridges you must set the
+ *	drive to "Single". "Master" will hang
+ *
+ *	If you have strange problems with nVidia chipset systems please
+ *	see the SI support documentation and update your system BIOS
+ *	if neccessary
+ */
+
+#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>
+
+#undef SIIMAGE_VIRTUAL_DMAPIO
+#undef SIIMAGE_LARGE_DMA
+
+/**
+ *	pdev_is_sata		-	check if device is SATA
+ *	@pdev:	PCI device to check
+ *	
+ *	Returns true if this is a SATA controller
+ */
+ 
+static int pdev_is_sata(struct pci_dev *pdev)
+{
+	switch(pdev->device)
+	{
+		case PCI_DEVICE_ID_SII_3112:
+		case PCI_DEVICE_ID_SII_1210SA:
+			return 1;
+		case PCI_DEVICE_ID_SII_680:
+			return 0;
+	}
+	BUG();
+	return 0;
+}
+ 
+/**
+ *	is_sata			-	check if hwif is SATA
+ *	@hwif:	interface to check
+ *	
+ *	Returns true if this is a SATA controller
+ */
+ 
+static inline int is_sata(ide_hwif_t *hwif)
+{
+	return pdev_is_sata(hwif->pci_dev);
+}
+
+/**
+ *	siimage_selreg		-	return register base
+ *	@hwif: interface
+ *	@r: config offset
+ *
+ *	Turn a config register offset into the right address in either
+ *	PCI space or MMIO space to access the control register in question
+ *	Thankfully this is a configuration operation so isnt performance
+ *	criticial. 
+ */
+ 
+static unsigned long siimage_selreg(ide_hwif_t *hwif, int r)
+{
+	unsigned long base = (unsigned long)hwif->hwif_data;
+	base += 0xA0 + r;
+	if(hwif->mmio)
+		base += (hwif->channel << 6);
+	else
+		base += (hwif->channel << 4);
+	return base;
+}
+	
+/**
+ *	siimage_seldev		-	return register base
+ *	@hwif: interface
+ *	@r: config offset
+ *
+ *	Turn a config register offset into the right address in either
+ *	PCI space or MMIO space to access the control register in question
+ *	including accounting for the unit shift.
+ */
+ 
+static inline unsigned long siimage_seldev(ide_drive_t *drive, int r)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	unsigned long base = (unsigned long)hwif->hwif_data;
+	base += 0xA0 + r;
+	if(hwif->mmio)
+		base += (hwif->channel << 6);
+	else
+		base += (hwif->channel << 4);
+	base |= drive->select.b.unit << drive->select.b.unit;
+	return base;
+}
+
+/**
+ *	siimage_ratemask	-	Compute available modes
+ *	@drive: IDE drive
+ *
+ *	Compute the available speeds for the devices on the interface.
+ *	For the CMD680 this depends on the clocking mode (scsc), for the
+ *	SI3312 SATA controller life is a bit simpler. Enforce UDMA33
+ *	as a limit if there is no 80pin cable present.
+ */
+ 
+static byte siimage_ratemask (ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	u8 mode	= 0, scsc = 0;
+	unsigned long base = (unsigned long) hwif->hwif_data;
+
+	if (hwif->mmio)
+		scsc = hwif->INB(base + 0x4A);
+	else
+		pci_read_config_byte(hwif->pci_dev, 0x8A, &scsc);
+
+	if(is_sata(hwif))
+	{
+		if(strstr(drive->id->model, "Maxtor"))
+			return 3;
+		return 4;
+	}
+	
+	if ((scsc & 0x30) == 0x10)	/* 133 */
+		mode = 4;
+	else if ((scsc & 0x30) == 0x20)	/* 2xPCI */
+		mode = 4;
+	else if ((scsc & 0x30) == 0x00)	/* 100 */
+		mode = 3;
+	else 	/* Disabled ? */
+		BUG();
+
+	if (!eighty_ninty_three(drive))
+		mode = min(mode, (u8)1);
+	return mode;
+}
+
+/**
+ *	siimage_taskfile_timing	-	turn timing data to a mode
+ *	@hwif: interface to query
+ *
+ *	Read the timing data for the interface and return the 
+ *	mode that is being used.
+ */
+ 
+static byte siimage_taskfile_timing (ide_hwif_t *hwif)
+{
+	u16 timing	= 0x328a;
+	unsigned long addr = siimage_selreg(hwif, 2);
+
+	if (hwif->mmio)
+		timing = hwif->INW(addr);
+	else
+		pci_read_config_word(hwif->pci_dev, addr, &timing);
+
+	switch (timing) {
+		case 0x10c1:	return 4;
+		case 0x10c3:	return 3;
+		case 0x1104:
+		case 0x1281:	return 2;
+		case 0x2283:	return 1;
+		case 0x328a:
+		default:	return 0;
+	}
+}
+
+/**
+ *	simmage_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. If we are in PIO mode 3 or 4 turn on IORDY
+ *	monitoring (bit 9). The TF timing is bits 31:16
+ */
+ 
+static void siimage_tuneproc (ide_drive_t *drive, byte mode_wanted)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	u32 speedt		= 0;
+	u16 speedp		= 0;
+	unsigned long addr	= siimage_seldev(drive, 0x04);
+	unsigned long tfaddr	= siimage_selreg(hwif, 0x02);
+	
+	/* cheat for now and use the docs */
+	switch(mode_wanted) {
+		case 4:	
+			speedp = 0x10c1; 
+			speedt = 0x10c1;
+			break;
+		case 3:	
+			speedp = 0x10C3; 
+			speedt = 0x10C3;
+			break;
+		case 2:	
+			speedp = 0x1104; 
+			speedt = 0x1281;
+			break;
+		case 1:		
+			speedp = 0x2283; 
+			speedt = 0x1281;
+			break;
+		case 0:
+		default:
+			speedp = 0x328A; 
+			speedt = 0x328A;
+			break;
+	}
+	if (hwif->mmio)
+	{
+		hwif->OUTW(speedt, addr);
+		hwif->OUTW(speedp, tfaddr);
+		/* Now set up IORDY */
+		if(mode_wanted == 3 || mode_wanted == 4)
+			hwif->OUTW(hwif->INW(tfaddr-2)|0x200, tfaddr-2);
+		else
+			hwif->OUTW(hwif->INW(tfaddr-2)&~0x200, tfaddr-2);
+	}
+	else
+	{
+		pci_write_config_word(hwif->pci_dev, addr, speedp);
+		pci_write_config_word(hwif->pci_dev, tfaddr, speedt);
+		pci_read_config_word(hwif->pci_dev, tfaddr-2, &speedp);
+		speedp &= ~0x200;
+		/* Set IORDY for mode 3 or 4 */
+		if(mode_wanted == 3 || mode_wanted == 4)
+			speedp |= 0x200;
+		pci_write_config_word(hwif->pci_dev, tfaddr-2, speedp);
+	}
+}
+
+/**
+ *	config_siimage_chipset_for_pio	-	set drive timings
+ *	@drive: drive to tune
+ *	@speed we want
+ *
+ *	Compute the best pio mode we can for a given device. Also honour
+ *	the timings for the driver when dealing with mixed devices. Some
+ *	of this is ugly but its all wrapped up here
+ *
+ *	The SI680 can also do VDMA - we need to start using that
+ *
+ *	FIXME: we use the BIOS channel timings to avoid driving the task
+ *	files too fast at the disk. We need to compute the master/slave
+ *	drive PIO mode properly so that we can up the speed on a hotplug
+ *	system.
+ */
+ 
+static void config_siimage_chipset_for_pio (ide_drive_t *drive, byte set_speed)
+{
+	u8 channel_timings	= siimage_taskfile_timing(HWIF(drive));
+	u8 speed = 0, set_pio	= ide_get_best_pio_mode(drive, 4, 5, NULL);
+
+	/* WARNING PIO timing mess is going to happen b/w devices, argh */
+	if ((channel_timings != set_pio) && (set_pio > channel_timings))
+		set_pio = channel_timings;
+
+	siimage_tuneproc(drive, set_pio);
+	speed = XFER_PIO_0 + set_pio;
+	if (set_speed)
+		(void) ide_config_drive_speed(drive, speed);
+}
+
+static void config_chipset_for_pio (ide_drive_t *drive, byte set_speed)
+{
+	config_siimage_chipset_for_pio(drive, set_speed);
+}
+
+/**
+ *	siimage_tune_chipset	-	set controller timings
+ *	@drive: Drive to set up
+ *	@xferspeed: speed we want to achieve
+ *
+ *	Tune the SII 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 siimage_tune_chipset (ide_drive_t *drive, byte xferspeed)
+{
+	u8 ultra6[]		= { 0x0F, 0x0B, 0x07, 0x05, 0x03, 0x02, 0x01 };
+	u8 ultra5[]		= { 0x0C, 0x07, 0x05, 0x04, 0x02, 0x01 };
+	u16 dma[]		= { 0x2208, 0x10C2, 0x10C1 };
+
+	ide_hwif_t *hwif	= HWIF(drive);
+	u16 ultra = 0, multi	= 0;
+	u8 mode = 0, unit	= drive->select.b.unit;
+	u8 speed		= ide_rate_filter(siimage_ratemask(drive), xferspeed);
+	unsigned long base	= (unsigned long)hwif->hwif_data;
+	u8 scsc = 0, addr_mask	= ((hwif->channel) ?
+				    ((hwif->mmio) ? 0xF4 : 0x84) :
+				    ((hwif->mmio) ? 0xB4 : 0x80));
+				    
+	unsigned long ma	= siimage_seldev(drive, 0x08);
+	unsigned long ua	= siimage_seldev(drive, 0x0C);
+
+	if (hwif->mmio) {
+		scsc = hwif->INB(base + 0x4A);
+		mode = hwif->INB(base + addr_mask);
+		multi = hwif->INW(ma);
+		ultra = hwif->INW(ua);
+	} else {
+		pci_read_config_byte(hwif->pci_dev, 0x8A, &scsc);
+		pci_read_config_byte(hwif->pci_dev, addr_mask, &mode);
+		pci_read_config_word(hwif->pci_dev, ma, &multi);
+		pci_read_config_word(hwif->pci_dev, ua, &ultra);
+	}
+
+	mode &= ~((unit) ? 0x30 : 0x03);
+	ultra &= ~0x3F;
+	scsc = ((scsc & 0x30) == 0x00) ? 0 : 1;
+
+	scsc = is_sata(hwif) ? 1 : scsc;
+
+	switch(speed) {
+		case XFER_PIO_4:
+		case XFER_PIO_3:
+		case XFER_PIO_2:
+		case XFER_PIO_1:
+		case XFER_PIO_0:
+			siimage_tuneproc(drive, (speed - XFER_PIO_0));
+			mode |= ((unit) ? 0x10 : 0x01);
+			break;
+		case XFER_MW_DMA_2:
+		case XFER_MW_DMA_1:
+		case XFER_MW_DMA_0:
+			multi = dma[speed - XFER_MW_DMA_0];
+			mode |= ((unit) ? 0x20 : 0x02);
+			config_siimage_chipset_for_pio(drive, 0);
+			break;
+		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:
+			multi = dma[2];
+			ultra |= ((scsc) ? (ultra6[speed - XFER_UDMA_0]) :
+					   (ultra5[speed - XFER_UDMA_0]));
+			mode |= ((unit) ? 0x30 : 0x03);
+			config_siimage_chipset_for_pio(drive, 0);
+			break;
+		default:
+			return 1;
+	}
+
+	if (hwif->mmio) {
+		hwif->OUTB(mode, base + addr_mask);
+		hwif->OUTW(multi, ma);
+		hwif->OUTW(ultra, ua);
+	} else {
+		pci_write_config_byte(hwif->pci_dev, addr_mask, mode);
+		pci_write_config_word(hwif->pci_dev, ma, multi);
+		pci_write_config_word(hwif->pci_dev, ua, ultra);
+	}
+	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.
+ *	For the CMD680 we also need to set up the PIO timings and
+ *	enable DMA.
+ */
+ 
+static int config_chipset_for_dma (ide_drive_t *drive)
+{
+	u8 speed	= ide_dma_speed(drive, siimage_ratemask(drive));
+
+	config_chipset_for_pio(drive, !speed);
+
+	if (!speed)
+		return 0;
+
+	if (ide_set_xfer_rate(drive, speed))
+		return 0;
+
+	if (!drive->init_speed)
+		drive->init_speed = speed;
+
+	return ide_dma_enable(drive);
+}
+
+/**
+ *	siimage_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 siimage_config_drive_for_dma (ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	struct hd_driveid *id	= drive->id;
+
+	if ((id->capability & 1) != 0 && drive->autodma) {
+
+		if (ide_use_dma(drive)) {
+			if (config_chipset_for_dma(drive))
+				return hwif->ide_dma_on(drive);
+		}
+
+		goto fast_ata_pio;
+
+	} else if ((id->capability & 8) || (id->field_valid & 2)) {
+fast_ata_pio:
+		config_chipset_for_pio(drive, 1);
+		return hwif->ide_dma_off_quietly(drive);
+	}
+	/* IORDY not supported */
+	return 0;
+}
+
+/* returns 1 if dma irq issued, 0 otherwise */
+static int siimage_io_ide_dma_test_irq (ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	u8 dma_altstat		= 0;
+	unsigned long addr	= siimage_selreg(hwif, 1);
+
+	/* return 1 if INTR asserted */
+	if ((hwif->INB(hwif->dma_status) & 4) == 4)
+		return 1;
+
+	/* return 1 if Device INTR asserted */
+	pci_read_config_byte(hwif->pci_dev, addr, &dma_altstat);
+	if (dma_altstat & 8)
+		return 0;	//return 1;
+	return 0;
+}
+
+#if 0
+/**
+ *	siimage_mmio_ide_dma_count	-	DMA bytes done
+ *	@drive
+ *
+ *	If we are doing VDMA the CMD680 requires a little bit
+ *	of more careful handling and we have to read the counts
+ *	off ourselves. For non VDMA life is normal.
+ */
+ 
+static int siimage_mmio_ide_dma_count (ide_drive_t *drive)
+{
+#ifdef SIIMAGE_VIRTUAL_DMAPIO
+	struct request *rq	= HWGROUP(drive)->rq;
+	ide_hwif_t *hwif	= HWIF(drive);
+	u32 count		= (rq->nr_sectors * SECTOR_SIZE);
+	u32 rcount		= 0;
+	unsigned long addr	= siimage_selreg(hwif, 0x1C);
+
+	hwif->OUTL(count, addr);
+	rcount = hwif->INL(addr);
+
+	printk("\n%s: count = %d, rcount = %d, nr_sectors = %lu\n",
+		drive->name, count, rcount, rq->nr_sectors);
+
+#endif /* SIIMAGE_VIRTUAL_DMAPIO */
+	return __ide_dma_count(drive);
+}
+#endif
+
+/**
+ *	siimage_mmio_ide_dma_test_irq	-	check we caused an IRQ
+ *	@drive: drive we are testing
+ *
+ *	Check if we caused an IDE DMA interrupt. We may also have caused
+ *	SATA status interrupts, if so we clean them up and continue.
+ */
+ 
+static int siimage_mmio_ide_dma_test_irq (ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	unsigned long base	= (unsigned long)hwif->hwif_data;
+	unsigned long addr	= siimage_selreg(hwif, 0x1);
+
+	if (SATA_ERROR_REG) {
+		u32 ext_stat = hwif->INL(base + 0x10);
+		u8 watchdog = 0;
+		if (ext_stat & ((hwif->channel) ? 0x40 : 0x10)) {
+			u32 sata_error = hwif->INL(SATA_ERROR_REG);
+			hwif->OUTL(sata_error, SATA_ERROR_REG);
+			watchdog = (sata_error & 0x00680000) ? 1 : 0;
+#if 1
+			printk(KERN_WARNING "%s: sata_error = 0x%08x, "
+				"watchdog = %d, %s\n",
+				drive->name, sata_error, watchdog,
+				__FUNCTION__);
+#endif
+
+		} else {
+			watchdog = (ext_stat & 0x8000) ? 1 : 0;
+		}
+		ext_stat >>= 16;
+
+		if (!(ext_stat & 0x0404) && !watchdog)
+			return 0;
+	}
+
+	/* return 1 if INTR asserted */
+	if ((hwif->INB(hwif->dma_status) & 0x04) == 0x04)
+		return 1;
+
+	/* return 1 if Device INTR asserted */
+	if ((hwif->INB(addr) & 8) == 8)
+		return 0;	//return 1;
+
+	return 0;
+}
+
+/**
+ *	siimage_busproc		-	bus isolation ioctl
+ *	@drive: drive to isolate/restore
+ *	@state: bus state to set
+ *
+ *	Used by the SII3112 to handle bus isolation. As this is a 
+ *	SATA controller the work required is quite limited, we 
+ *	just have to clean up the statistics
+ */
+ 
+static int siimage_busproc (ide_drive_t * drive, int state)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	u32 stat_config		= 0;
+	unsigned long addr	= siimage_selreg(hwif, 0);
+
+	if (hwif->mmio) {
+		stat_config = hwif->INL(addr);
+	} else
+		pci_read_config_dword(hwif->pci_dev, addr, &stat_config);
+
+	switch (state) {
+		case BUSSTATE_ON:
+			hwif->drives[0].failures = 0;
+			hwif->drives[1].failures = 0;
+			break;
+		case BUSSTATE_OFF:
+			hwif->drives[0].failures = hwif->drives[0].max_failures + 1;
+			hwif->drives[1].failures = hwif->drives[1].max_failures + 1;
+			break;
+		case BUSSTATE_TRISTATE:
+			hwif->drives[0].failures = hwif->drives[0].max_failures + 1;
+			hwif->drives[1].failures = hwif->drives[1].max_failures + 1;
+			break;
+		default:
+			return -EINVAL;
+	}
+	hwif->bus_state = state;
+	return 0;
+}
+
+/**
+ *	siimage_reset_poll	-	wait for sata reset
+ *	@drive: drive we are resetting
+ *
+ *	Poll the SATA phy and see whether it has come back from the dead
+ *	yet.
+ */
+ 
+static int siimage_reset_poll (ide_drive_t *drive)
+{
+	if (SATA_STATUS_REG) {
+		ide_hwif_t *hwif	= HWIF(drive);
+
+		if ((hwif->INL(SATA_STATUS_REG) & 0x03) != 0x03) {
+			printk(KERN_WARNING "%s: reset phy dead, status=0x%08x\n",
+				hwif->name, hwif->INL(SATA_STATUS_REG));
+			HWGROUP(drive)->polling = 0;
+			return ide_started;
+		}
+		return 0;
+	} else {
+		return 0;
+	}
+}
+
+/**
+ *	siimage_pre_reset	-	reset hook
+ *	@drive: IDE device being reset
+ *
+ *	For the SATA devices we need to handle recalibration/geometry
+ *	differently
+ */
+ 
+static void siimage_pre_reset (ide_drive_t *drive)
+{
+	if (drive->media != ide_disk)
+		return;
+
+	if (is_sata(HWIF(drive)))
+	{
+		drive->special.b.set_geometry = 0;
+		drive->special.b.recalibrate = 0;
+	}
+}
+
+/**
+ *	siimage_reset	-	reset a device on an siimage controller
+ *	@drive: drive to reset
+ *
+ *	Perform a controller level reset fo the device. For
+ *	SATA we must also check the PHY.
+ */
+ 
+static void siimage_reset (ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	u8 reset		= 0;
+	unsigned long addr	= siimage_selreg(hwif, 0);
+
+	if (hwif->mmio) {
+		reset = hwif->INB(addr);
+		hwif->OUTB((reset|0x03), addr);
+		/* FIXME:posting */
+		udelay(25);
+		hwif->OUTB(reset, addr);
+		(void) hwif->INB(addr);
+	} else {
+		pci_read_config_byte(hwif->pci_dev, addr, &reset);
+		pci_write_config_byte(hwif->pci_dev, addr, reset|0x03);
+		udelay(25);
+		pci_write_config_byte(hwif->pci_dev, addr, reset);
+		pci_read_config_byte(hwif->pci_dev, addr, &reset);
+	}
+
+	if (SATA_STATUS_REG) {
+		u32 sata_stat = hwif->INL(SATA_STATUS_REG);
+		printk(KERN_WARNING "%s: reset phy, status=0x%08x, %s\n",
+			hwif->name, sata_stat, __FUNCTION__);
+		if (!(sata_stat)) {
+			printk(KERN_WARNING "%s: reset phy dead, status=0x%08x\n",
+				hwif->name, sata_stat);
+			drive->failures++;
+		}
+	}
+
+}
+
+/**
+ *	proc_reports_siimage		-	add siimage controller to proc
+ *	@dev: PCI device
+ *	@clocking: SCSC value
+ *	@name: controller name
+ *
+ *	Report the clocking mode of the controller and add it to
+ *	the /proc interface layer
+ */
+ 
+static void proc_reports_siimage (struct pci_dev *dev, u8 clocking, const char *name)
+{
+	if (!pdev_is_sata(dev)) {
+		printk(KERN_INFO "%s: BASE CLOCK ", name);
+		clocking &= 0x03;
+		switch (clocking) {
+			case 0x03: printk("DISABLED!\n"); break;
+			case 0x02: printk("== 2X PCI\n"); break;
+			case 0x01: printk("== 133\n"); break;
+			case 0x00: printk("== 100\n"); break;
+		}
+	}
+}
+
+/**
+ *	setup_mmio_siimage	-	switch an SI controller into MMIO
+ *	@dev: PCI device we are configuring
+ *	@name: device name
+ *
+ *	Attempt to put the device into mmio mode. There are some slight
+ *	complications here with certain systems where the mmio bar isnt
+ *	mapped so we have to be sure we can fall back to I/O.
+ */
+ 
+static unsigned int setup_mmio_siimage (struct pci_dev *dev, const char *name)
+{
+	unsigned long bar5	= pci_resource_start(dev, 5);
+	unsigned long barsize	= pci_resource_len(dev, 5);
+	u8 tmpbyte	= 0;
+	void __iomem *ioaddr;
+
+	/*
+	 *	Drop back to PIO if we can't map the mmio. Some
+	 *	systems seem to get terminally confused in the PCI
+	 *	spaces.
+	 */
+	 
+	if(!request_mem_region(bar5, barsize, name))
+	{
+		printk(KERN_WARNING "siimage: IDE controller MMIO ports not available.\n");
+		return 0;
+	}
+		
+	ioaddr = ioremap(bar5, barsize);
+
+	if (ioaddr == NULL)
+	{
+		release_mem_region(bar5, barsize);
+		return 0;
+	}
+
+	pci_set_master(dev);
+	pci_set_drvdata(dev, (void *) ioaddr);
+
+	if (pdev_is_sata(dev)) {
+		writel(0, ioaddr + 0x148);
+		writel(0, ioaddr + 0x1C8);
+	}
+
+	writeb(0, ioaddr + 0xB4);
+	writeb(0, ioaddr + 0xF4);
+	tmpbyte = readb(ioaddr + 0x4A);
+
+	switch(tmpbyte & 0x30) {
+		case 0x00:
+			/* In 100 MHz clocking, try and switch to 133 */
+			writeb(tmpbyte|0x10, ioaddr + 0x4A);
+			break;
+		case 0x10:
+			/* On 133Mhz clocking */
+			break;
+		case 0x20:
+			/* On PCIx2 clocking */
+			break;
+		case 0x30:
+			/* Clocking is disabled */
+			/* 133 clock attempt to force it on */
+			writeb(tmpbyte & ~0x20, ioaddr + 0x4A);
+			break;
+	}
+	
+	writeb(      0x72, ioaddr + 0xA1);
+	writew(    0x328A, ioaddr + 0xA2);
+	writel(0x62DD62DD, ioaddr + 0xA4);
+	writel(0x43924392, ioaddr + 0xA8);
+	writel(0x40094009, ioaddr + 0xAC);
+	writeb(      0x72, ioaddr + 0xE1);
+	writew(    0x328A, ioaddr + 0xE2);
+	writel(0x62DD62DD, ioaddr + 0xE4);
+	writel(0x43924392, ioaddr + 0xE8);
+	writel(0x40094009, ioaddr + 0xEC);
+
+	if (pdev_is_sata(dev)) {
+		writel(0xFFFF0000, ioaddr + 0x108);
+		writel(0xFFFF0000, ioaddr + 0x188);
+		writel(0x00680000, ioaddr + 0x148);
+		writel(0x00680000, ioaddr + 0x1C8);
+	}
+
+	tmpbyte = readb(ioaddr + 0x4A);
+
+	proc_reports_siimage(dev, (tmpbyte>>4), name);
+	return 1;
+}
+
+/**
+ *	init_chipset_siimage	-	set up an SI device
+ *	@dev: PCI device
+ *	@name: device name
+ *
+ *	Perform the initial PCI set up for this device. Attempt to switch
+ *	to 133MHz clocking if the system isn't already set up to do it.
+ */
+
+static unsigned int __devinit init_chipset_siimage(struct pci_dev *dev, const char *name)
+{
+	u32 class_rev	= 0;
+	u8 tmpbyte	= 0;
+	u8 BA5_EN	= 0;
+
+        pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
+        class_rev &= 0xff;
+	pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (class_rev) ? 1 : 255);	
+
+	pci_read_config_byte(dev, 0x8A, &BA5_EN);
+	if ((BA5_EN & 0x01) || (pci_resource_start(dev, 5))) {
+		if (setup_mmio_siimage(dev, name)) {
+			return 0;
+		}
+	}
+
+	pci_write_config_byte(dev, 0x80, 0x00);
+	pci_write_config_byte(dev, 0x84, 0x00);
+	pci_read_config_byte(dev, 0x8A, &tmpbyte);
+	switch(tmpbyte & 0x30) {
+		case 0x00:
+			/* 133 clock attempt to force it on */
+			pci_write_config_byte(dev, 0x8A, tmpbyte|0x10);
+		case 0x30:
+			/* if clocking is disabled */
+			/* 133 clock attempt to force it on */
+			pci_write_config_byte(dev, 0x8A, tmpbyte & ~0x20);
+		case 0x10:
+			/* 133 already */
+			break;
+		case 0x20:
+			/* BIOS set PCI x2 clocking */
+			break;
+	}
+
+	pci_read_config_byte(dev,   0x8A, &tmpbyte);
+
+	pci_write_config_byte(dev,  0xA1, 0x72);
+	pci_write_config_word(dev,  0xA2, 0x328A);
+	pci_write_config_dword(dev, 0xA4, 0x62DD62DD);
+	pci_write_config_dword(dev, 0xA8, 0x43924392);
+	pci_write_config_dword(dev, 0xAC, 0x40094009);
+	pci_write_config_byte(dev,  0xB1, 0x72);
+	pci_write_config_word(dev,  0xB2, 0x328A);
+	pci_write_config_dword(dev, 0xB4, 0x62DD62DD);
+	pci_write_config_dword(dev, 0xB8, 0x43924392);
+	pci_write_config_dword(dev, 0xBC, 0x40094009);
+
+	proc_reports_siimage(dev, (tmpbyte>>4), name);
+	return 0;
+}
+
+/**
+ *	init_mmio_iops_siimage	-	set up the iops for MMIO
+ *	@hwif: interface to set up
+ *
+ *	The basic setup here is fairly simple, we can use standard MMIO
+ *	operations. However we do have to set the taskfile register offsets
+ *	by hand as there isnt a standard defined layout for them this
+ *	time.
+ *
+ *	The hardware supports buffered taskfiles and also some rather nice
+ *	extended PRD tables. Unfortunately right now we don't.
+ */
+
+static void __devinit init_mmio_iops_siimage(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev	= hwif->pci_dev;
+	void *addr		= pci_get_drvdata(dev);
+	u8 ch			= hwif->channel;
+	hw_regs_t		hw;
+	unsigned long		base;
+
+	/*
+	 *	Fill in the basic HWIF bits
+	 */
+
+	default_hwif_mmiops(hwif);
+	hwif->hwif_data			= addr;
+
+	/*
+	 *	Now set up the hw. We have to do this ourselves as
+	 *	the MMIO layout isnt the same as the the standard port
+	 *	based I/O
+	 */
+
+	memset(&hw, 0, sizeof(hw_regs_t));
+
+	base = (unsigned long)addr;
+	if (ch)
+		base += 0xC0;
+	else
+		base += 0x80;
+
+	/*
+	 *	The buffered task file doesn't have status/control
+	 *	so we can't currently use it sanely since we want to
+	 *	use LBA48 mode.
+	 */	
+//	base += 0x10;
+//	hwif->no_lba48 = 1;
+
+	hw.io_ports[IDE_DATA_OFFSET]	= base;
+	hw.io_ports[IDE_ERROR_OFFSET]	= base + 1;
+	hw.io_ports[IDE_NSECTOR_OFFSET]	= base + 2;
+	hw.io_ports[IDE_SECTOR_OFFSET]	= base + 3;
+	hw.io_ports[IDE_LCYL_OFFSET]	= base + 4;
+	hw.io_ports[IDE_HCYL_OFFSET]	= base + 5;
+	hw.io_ports[IDE_SELECT_OFFSET]	= base + 6;
+	hw.io_ports[IDE_STATUS_OFFSET]	= base + 7;
+	hw.io_ports[IDE_CONTROL_OFFSET]	= base + 10;
+
+	hw.io_ports[IDE_IRQ_OFFSET]	= 0;
+
+	if (pdev_is_sata(dev)) {
+		base = (unsigned long)addr;
+		if (ch)
+			base += 0x80;
+		hwif->sata_scr[SATA_STATUS_OFFSET]	= base + 0x104;
+		hwif->sata_scr[SATA_ERROR_OFFSET]	= base + 0x108;
+		hwif->sata_scr[SATA_CONTROL_OFFSET]	= base + 0x100;
+		hwif->sata_misc[SATA_MISC_OFFSET]	= base + 0x140;
+		hwif->sata_misc[SATA_PHY_OFFSET]	= base + 0x144;
+		hwif->sata_misc[SATA_IEN_OFFSET]	= base + 0x148;
+	}
+
+	hw.irq				= hwif->pci_dev->irq;
+
+	memcpy(&hwif->hw, &hw, sizeof(hw));
+	memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
+
+	hwif->irq			= hw.irq;
+
+       	base = (unsigned long) addr;
+
+#ifdef SIIMAGE_LARGE_DMA
+/* Watch the brackets - even Ken and Dennis get some language design wrong */
+	hwif->dma_base			= base + (ch ? 0x18 : 0x10);
+	hwif->dma_base2			= base + (ch ? 0x08 : 0x00);
+	hwif->dma_prdtable		= hwif->dma_base2 + 4;
+#else /* ! SIIMAGE_LARGE_DMA */
+	hwif->dma_base			= base + (ch ? 0x08 : 0x00);
+	hwif->dma_base2			= base + (ch ? 0x18 : 0x10);
+#endif /* SIIMAGE_LARGE_DMA */
+	hwif->mmio			= 2;
+}
+
+static int is_dev_seagate_sata(ide_drive_t *drive)
+{
+	const char *s = &drive->id->model[0];
+	unsigned len;
+
+	if (!drive->present)
+		return 0;
+
+	len = strnlen(s, sizeof(drive->id->model));
+
+	if ((len > 4) && (!memcmp(s, "ST", 2))) {
+		if ((!memcmp(s + len - 2, "AS", 2)) ||
+		    (!memcmp(s + len - 3, "ASL", 3))) {
+			printk(KERN_INFO "%s: applying pessimistic Seagate "
+					 "errata fix\n", drive->name);
+			return 1;
+		}
+	}
+	return 0;
+}
+
+/**
+ *	siimage_fixup		-	post probe fixups
+ *	@hwif: interface to fix up
+ *
+ *	Called after drive probe we use this to decide whether the
+ *	Seagate fixup must be applied. This used to be in init_iops but
+ *	that can occur before we know what drives are present.
+ */
+
+static void __devinit siimage_fixup(ide_hwif_t *hwif)
+{
+	/* Try and raise the rqsize */
+	if (!is_sata(hwif) || !is_dev_seagate_sata(&hwif->drives[0]))
+		hwif->rqsize = 128;
+}
+
+/**
+ *	init_iops_siimage	-	set up iops
+ *	@hwif: interface to set up
+ *
+ *	Do the basic setup for the SIIMAGE hardware interface
+ *	and then do the MMIO setup if we can. This is the first
+ *	look in we get for setting up the hwif so that we
+ *	can get the iops right before using them.
+ */
+
+static void __devinit init_iops_siimage(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev	= hwif->pci_dev;
+	u32 class_rev		= 0;
+
+	pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
+	class_rev &= 0xff;
+	
+	hwif->hwif_data = NULL;
+
+	/* Pessimal until we finish probing */
+	hwif->rqsize = 15;
+
+	if (pci_get_drvdata(dev) == NULL)
+		return;
+	init_mmio_iops_siimage(hwif);
+}
+
+/**
+ *	ata66_siimage	-	check for 80 pin cable
+ *	@hwif: interface to check
+ *
+ *	Check for the presence of an ATA66 capable cable on the
+ *	interface.
+ */
+
+static unsigned int __devinit ata66_siimage(ide_hwif_t *hwif)
+{
+	unsigned long addr = siimage_selreg(hwif, 0);
+	if (pci_get_drvdata(hwif->pci_dev) == NULL) {
+		u8 ata66 = 0;
+		pci_read_config_byte(hwif->pci_dev, addr, &ata66);
+		return (ata66 & 0x01) ? 1 : 0;
+	}
+
+	return (hwif->INB(addr) & 0x01) ? 1 : 0;
+}
+
+/**
+ *	init_hwif_siimage	-	set up hwif structs
+ *	@hwif: interface to set up
+ *
+ *	We do the basic set up of the interface structure. The SIIMAGE
+ *	requires several custom handlers so we override the default
+ *	ide DMA handlers appropriately
+ */
+
+static void __devinit init_hwif_siimage(ide_hwif_t *hwif)
+{
+	hwif->autodma = 0;
+	
+	hwif->resetproc = &siimage_reset;
+	hwif->speedproc = &siimage_tune_chipset;
+	hwif->tuneproc	= &siimage_tuneproc;
+	hwif->reset_poll = &siimage_reset_poll;
+	hwif->pre_reset = &siimage_pre_reset;
+
+	if(is_sata(hwif))
+		hwif->busproc   = &siimage_busproc;
+
+	if (!hwif->dma_base) {
+		hwif->drives[0].autotune = 1;
+		hwif->drives[1].autotune = 1;
+		return;
+	}
+
+	hwif->ultra_mask = 0x7f;
+	hwif->mwdma_mask = 0x07;
+	hwif->swdma_mask = 0x07;
+
+	if (!is_sata(hwif))
+		hwif->atapi_dma = 1;
+
+	hwif->ide_dma_check = &siimage_config_drive_for_dma;
+	if (!(hwif->udma_four))
+		hwif->udma_four = ata66_siimage(hwif);
+
+	if (hwif->mmio) {
+		hwif->ide_dma_test_irq = &siimage_mmio_ide_dma_test_irq;
+	} else {
+		hwif->ide_dma_test_irq = & siimage_io_ide_dma_test_irq;
+	}
+	
+	/*
+	 *	The BIOS often doesn't set up DMA on this controller
+	 *	so we always do it.
+	 */
+
+	hwif->autodma = 1;
+	hwif->drives[0].autodma = hwif->autodma;
+	hwif->drives[1].autodma = hwif->autodma;
+}
+
+#define DECLARE_SII_DEV(name_str)			\
+	{						\
+		.name		= name_str,		\
+		.init_chipset	= init_chipset_siimage,	\
+		.init_iops	= init_iops_siimage,	\
+		.init_hwif	= init_hwif_siimage,	\
+		.fixup		= siimage_fixup,	\
+		.channels	= 2,			\
+		.autodma	= AUTODMA,		\
+		.bootable	= ON_BOARD,		\
+	}
+
+static ide_pci_device_t siimage_chipsets[] __devinitdata = {
+	/* 0 */ DECLARE_SII_DEV("SiI680"),
+	/* 1 */ DECLARE_SII_DEV("SiI3112 Serial ATA"),
+	/* 2 */ DECLARE_SII_DEV("Adaptec AAR-1210SA")
+};
+
+/**
+ *	siimage_init_one	-	pci layer discovery entry
+ *	@dev: PCI device
+ *	@id: ident table entry
+ *
+ *	Called by the PCI code when it finds an SI680 or SI3112 controller.
+ *	We then use the IDE PCI generic helper to do most of the work.
+ */
+ 
+static int __devinit siimage_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	return ide_setup_pci_device(dev, &siimage_chipsets[id->driver_data]);
+}
+
+static struct pci_device_id siimage_pci_tbl[] = {
+	{ PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_SII_680,  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+#ifdef CONFIG_BLK_DEV_IDE_SATA
+	{ PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_SII_3112, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
+	{ PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_SII_1210SA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2},
+#endif
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, siimage_pci_tbl);
+
+static struct pci_driver driver = {
+	.name		= "SiI_IDE",
+	.id_table	= siimage_pci_tbl,
+	.probe		= siimage_init_one,
+};
+
+static int siimage_ide_init(void)
+{
+	return ide_pci_register_driver(&driver);
+}
+
+module_init(siimage_ide_init);
+
+MODULE_AUTHOR("Andre Hedrick, Alan Cox");
+MODULE_DESCRIPTION("PCI driver module for SiI IDE");
+MODULE_LICENSE("GPL");