[libata] Add a bunch of PATA drivers.

The vast majority of drivers and changes are from Alan Cox.  Albert Lee
contributed and maintains pata_pdc2027x.  Adrian Bunk, Andrew Morton,
and Tejun Heo contributed various minor fixes and updates.

Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 847 insertions, 0 deletions

diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
new file mode 100644
index 00000000000..c8a7798f8ce
--- /dev/null
+++ b/drivers/ata/pata_it821x.c
@@ -0,0 +1,847 @@
+/*
+ * ata-it821x.c 	- IT821x PATA for new ATA layer
+ *			  (C) 2005 Red Hat Inc
+ *			  Alan Cox <alan@redhat.com>
+ *
+ * based upon
+ *
+ * it821x.c
+ * 
+ * linux/drivers/ide/pci/it821x.c		Version 0.09	December 2004
+ *
+ * Copyright (C) 2004		Red Hat <alan@redhat.com>
+ *
+ *  May be copied or modified under the terms of the GNU General Public License
+ *  Based in part on the ITE vendor provided SCSI driver.
+ *
+ *  Documentation available from
+ * 	http://www.ite.com.tw/pc/IT8212F_V04.pdf
+ *  Some other documents are NDA.
+ *
+ *  The ITE8212 isn't exactly a standard IDE controller. It has two
+ *  modes. In pass through mode then it is an IDE controller. In its smart
+ *  mode its actually quite a capable hardware raid controller disguised
+ *  as an IDE controller. Smart mode only understands DMA read/write and
+ *  identify, none of the fancier commands apply. The IT8211 is identical
+ *  in other respects but lacks the raid mode.
+ *
+ *  Errata:
+ *  o	Rev 0x10 also requires master/slave hold the same DMA timings and
+ *	cannot do ATAPI MWDMA.
+ *  o	The identify data for raid volumes lacks CHS info (technically ok)
+ *	but also fails to set the LBA28 and other bits. We fix these in
+ *	the IDE probe quirk code.
+ *  o	If you write LBA48 sized I/O's (ie > 256 sector) in smart mode
+ *	raid then the controller firmware dies
+ *  o	Smart mode without RAID doesn't clear all the necessary identify
+ *	bits to reduce the command set to the one used
+ *
+ *  This has a few impacts on the driver
+ *  - In pass through mode we do all the work you would expect
+ *  - In smart mode the clocking set up is done by the controller generally
+ *    but we must watch the other limits and filter.
+ *  - There are a few extra vendor commands that actually talk to the
+ *    controller but only work PIO with no IRQ.
+ *
+ *  Vendor areas of the identify block in smart mode are used for the
+ *  timing and policy set up. Each HDD in raid mode also has a serial
+ *  block on the disk. The hardware extra commands are get/set chip status,
+ *  rebuild, get rebuild status.
+ *
+ *  In Linux the driver supports pass through mode as if the device was
+ *  just another IDE controller. If the smart mode is running then
+ *  volumes are managed by the controller firmware and each IDE "disk"
+ *  is a raid volume. Even more cute - the controller can do automated
+ *  hotplug and rebuild.
+ *
+ *  The pass through controller itself is a little demented. It has a
+ *  flaw that it has a single set of PIO/MWDMA timings per channel so
+ *  non UDMA devices restrict each others performance. It also has a
+ *  single clock source per channel so mixed UDMA100/133 performance
+ *  isn't perfect and we have to pick a clock. Thankfully none of this
+ *  matters in smart mode. ATAPI DMA is not currently supported.
+ *
+ *  It seems the smart mode is a win for RAID1/RAID10 but otherwise not.
+ *
+ *  TODO
+ *	-	ATAPI and other speed filtering
+ *	-	Command filter in smart mode
+ *	-	RAID configuration ioctls
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+
+
+#define DRV_NAME "pata_it821x"
+#define DRV_VERSION "0.3.2"
+
+struct it821x_dev
+{
+	unsigned int smart:1,		/* Are we in smart raid mode */
+		timing10:1;		/* Rev 0x10 */
+	u8	clock_mode;		/* 0, ATA_50 or ATA_66 */
+	u8	want[2][2];		/* Mode/Pri log for master slave */
+	/* We need these for switching the clock when DMA goes on/off
+	   The high byte is the 66Mhz timing */
+	u16	pio[2];			/* Cached PIO values */
+	u16	mwdma[2];		/* Cached MWDMA values */
+	u16	udma[2];		/* Cached UDMA values (per drive) */
+	u16	last_device;		/* Master or slave loaded ? */
+};
+
+#define ATA_66		0
+#define ATA_50		1
+#define ATA_ANY		2
+
+#define UDMA_OFF	0
+#define MWDMA_OFF	0
+
+/*
+ *	We allow users to force the card into non raid mode without
+ *	flashing the alternative BIOS. This is also neccessary right now
+ *	for embedded platforms that cannot run a PC BIOS but are using this
+ *	device.
+ */
+
+static int it8212_noraid;
+
+/**
+ *	it821x_pre_reset	-	probe
+ *	@ap: ATA port
+ *
+ *	Set the cable type
+ */
+ 
+static int it821x_pre_reset(struct ata_port *ap)
+{
+	ap->cbl = ATA_CBL_PATA80;
+	return ata_std_prereset(ap);
+}
+
+/**
+ *	it821x_error_handler	-	probe/reset
+ *	@ap: ATA port
+ *
+ *	Set the cable type and trigger a probe
+ */
+ 
+static void it821x_error_handler(struct ata_port *ap)
+{
+	return ata_bmdma_drive_eh(ap, it821x_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+/**
+ *	it821x_program	-	program the PIO/MWDMA registers
+ *	@ap: ATA port
+ *	@adev: Device to program
+ *	@timing: Timing value (66Mhz in top 8bits, 50 in the low 8)
+ *
+ *	Program the PIO/MWDMA timing for this channel according to the
+ *	current clock. These share the same register so are managed by
+ *	the DMA start/stop sequence as with the old driver.
+ */
+
+static void it821x_program(struct ata_port *ap, struct ata_device *adev, u16 timing)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	struct it821x_dev *itdev = ap->private_data;
+	int channel = ap->port_no;
+	u8 conf;
+
+	/* Program PIO/MWDMA timing bits */
+	if (itdev->clock_mode == ATA_66)
+		conf = timing >> 8;
+	else
+		conf = timing & 0xFF;
+	pci_write_config_byte(pdev, 0x54 + 4 * channel, conf);
+}
+
+
+/**
+ *	it821x_program_udma	-	program the UDMA registers
+ *	@ap: ATA port
+ *	@adev: ATA device to update
+ *	@timing: Timing bits. Top 8 are for 66Mhz bottom for 50Mhz
+ *
+ *	Program the UDMA timing for this drive according to the
+ *	current clock. Handles the dual clocks and also knows about
+ *	the errata on the 0x10 revision. The UDMA errata is partly handled
+ *	here and partly in start_dma.
+ */
+
+static void it821x_program_udma(struct ata_port *ap, struct ata_device *adev, u16 timing)
+{
+	struct it821x_dev *itdev = ap->private_data;
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	int channel = ap->port_no;
+	int unit = adev->devno;
+	u8 conf;
+
+	/* Program UDMA timing bits */
+	if (itdev->clock_mode == ATA_66)
+		conf = timing >> 8;
+	else
+		conf = timing & 0xFF;
+	if (itdev->timing10 == 0)
+		pci_write_config_byte(pdev, 0x56 + 4 * channel + unit, conf);
+	else {
+		/* Early revision must be programmed for both together */
+		pci_write_config_byte(pdev, 0x56 + 4 * channel, conf);
+		pci_write_config_byte(pdev, 0x56 + 4 * channel + 1, conf);
+	}
+}
+
+/**
+ *	it821x_clock_strategy
+ *	@ap: ATA interface
+ *	@adev: ATA device being updated
+ *
+ *	Select between the 50 and 66Mhz base clocks to get the best
+ *	results for this interface.
+ */
+
+static void it821x_clock_strategy(struct ata_port *ap, struct ata_device *adev)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	struct it821x_dev *itdev = ap->private_data;
+	u8 unit = adev->devno;
+	struct ata_device *pair = ata_dev_pair(adev);
+
+	int clock, altclock;
+	u8 v;
+	int sel = 0;
+
+	/* Look for the most wanted clocking */
+	if (itdev->want[0][0] > itdev->want[1][0]) {
+		clock = itdev->want[0][1];
+		altclock = itdev->want[1][1];
+	} else {
+		clock = itdev->want[1][1];
+		altclock = itdev->want[0][1];
+	}
+
+	/* Master doesn't care does the slave ? */
+	if (clock == ATA_ANY)
+		clock = altclock;
+
+	/* Nobody cares - keep the same clock */
+	if (clock == ATA_ANY)
+		return;
+	/* No change */
+	if (clock == itdev->clock_mode)
+		return;
+
+	/* Load this into the controller */
+	if (clock == ATA_66)
+		itdev->clock_mode = ATA_66;
+	else {
+		itdev->clock_mode = ATA_50;
+		sel = 1;
+	}
+	pci_read_config_byte(pdev, 0x50, &v);
+	v &= ~(1 << (1 + ap->port_no));
+	v |= sel << (1 + ap->port_no);
+	pci_write_config_byte(pdev, 0x50, v);
+
+	/*
+	 *	Reprogram the UDMA/PIO of the pair drive for the switch
+	 *	MWDMA will be dealt with by the dma switcher
+	 */
+	if (pair && itdev->udma[1-unit] != UDMA_OFF) {
+		it821x_program_udma(ap, pair, itdev->udma[1-unit]);
+		it821x_program(ap, pair, itdev->pio[1-unit]);
+	}
+	/*
+	 *	Reprogram the UDMA/PIO of our drive for the switch.
+	 *	MWDMA will be dealt with by the dma switcher
+	 */
+	if (itdev->udma[unit] != UDMA_OFF) {
+		it821x_program_udma(ap, adev, itdev->udma[unit]);
+		it821x_program(ap, adev, itdev->pio[unit]);
+	}
+}
+
+/**
+ *	it821x_passthru_set_piomode	-	set PIO mode data
+ *	@ap: ATA interface
+ *	@adev: ATA device
+ *
+ *	Configure for PIO mode. This is complicated as the register is
+ *	shared by PIO and MWDMA and for both channels.
+ */
+
+static void it821x_passthru_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+	/* Spec says 89 ref driver uses 88 */
+	static const u16 pio[]	= { 0xAA88, 0xA382, 0xA181, 0x3332, 0x3121 };
+	static const u8 pio_want[]    = { ATA_66, ATA_66, ATA_66, ATA_66, ATA_ANY };
+
+	struct it821x_dev *itdev = ap->private_data;
+	int unit = adev->devno;
+	int mode_wanted = adev->pio_mode - XFER_PIO_0;
+	
+	/* We prefer 66Mhz clock for PIO 0-3, don't care for PIO4 */
+	itdev->want[unit][1] = pio_want[mode_wanted];
+	itdev->want[unit][0] = 1;	/* PIO is lowest priority */
+	itdev->pio[unit] = pio[mode_wanted];
+	it821x_clock_strategy(ap, adev);
+	it821x_program(ap, adev, itdev->pio[unit]);
+}
+
+/**
+ *	it821x_passthru_set_dmamode	-	set initial DMA mode data
+ *	@ap: ATA interface
+ *	@adev: ATA device
+ *
+ *	Set up the DMA modes. The actions taken depend heavily on the mode
+ *	to use. If UDMA is used as is hopefully the usual case then the 
+ *	timing register is private and we need only consider the clock. If
+ *	we are using MWDMA then we have to manage the setting ourself as
+ *	we switch devices and mode.
+ */
+
+static void it821x_passthru_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+	static const u16 dma[]	= 	{ 0x8866, 0x3222, 0x3121 };
+	static const u8 mwdma_want[] =  { ATA_ANY, ATA_66, ATA_ANY };
+	static const u16 udma[]	= 	{ 0x4433, 0x4231, 0x3121, 0x2121, 0x1111, 0x2211, 0x1111 };
+	static const u8 udma_want[] =   { ATA_ANY, ATA_50, ATA_ANY, ATA_66, ATA_66, ATA_50, ATA_66 };
+
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	struct it821x_dev *itdev = ap->private_data;
+	int channel = ap->port_no;
+	int unit = adev->devno;
+	u8 conf;
+
+	if (adev->dma_mode >= XFER_UDMA_0) {
+		int mode_wanted = adev->dma_mode - XFER_UDMA_0;
+		
+		itdev->want[unit][1] = udma_want[mode_wanted];
+		itdev->want[unit][0] = 3;	/* UDMA is high priority */
+		itdev->mwdma[unit] = MWDMA_OFF;
+		itdev->udma[unit] = udma[mode_wanted];
+		if (mode_wanted >= 5)
+			itdev->udma[unit] |= 0x8080;	/* UDMA 5/6 select on */
+
+		/* UDMA on. Again revision 0x10 must do the pair */
+		pci_read_config_byte(pdev, 0x50, &conf);
+		if (itdev->timing10)
+			conf &= channel ? 0x9F: 0xE7;
+		else
+			conf &= ~ (1 << (3 + 2 * channel + unit));
+		pci_write_config_byte(pdev, 0x50, conf);
+		it821x_clock_strategy(ap, adev);
+		it821x_program_udma(ap, adev, itdev->udma[unit]);
+	} else {
+		int mode_wanted = adev->dma_mode - XFER_MW_DMA_0;
+		
+		itdev->want[unit][1] = mwdma_want[mode_wanted];
+		itdev->want[unit][0] = 2;	/* MWDMA is low priority */
+		itdev->mwdma[unit] = dma[mode_wanted];
+		itdev->udma[unit] = UDMA_OFF;
+
+		/* UDMA bits off - Revision 0x10 do them in pairs */
+		pci_read_config_byte(pdev, 0x50, &conf);
+		if (itdev->timing10)
+			conf |= channel ? 0x60: 0x18;
+		else
+			conf |= 1 << (3 + 2 * channel + unit);
+		pci_write_config_byte(pdev, 0x50, conf);
+		it821x_clock_strategy(ap, adev);
+	}
+}
+
+/**
+ *	it821x_passthru_dma_start	-	DMA start callback
+ *	@qc: Command in progress
+ *
+ *	Usually drivers set the DMA timing at the point the set_dmamode call
+ *	is made. IT821x however requires we load new timings on the 
+ *	transitions in some cases.
+ */
+
+static void it821x_passthru_bmdma_start(struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	struct ata_device *adev = qc->dev;
+	struct it821x_dev *itdev = ap->private_data;
+	int unit = adev->devno;
+
+	if (itdev->mwdma[unit] != MWDMA_OFF)
+		it821x_program(ap, adev, itdev->mwdma[unit]);
+	else if (itdev->udma[unit] != UDMA_OFF && itdev->timing10)
+		it821x_program_udma(ap, adev, itdev->udma[unit]);
+	ata_bmdma_start(qc);
+}
+
+/**
+ *	it821x_passthru_dma_stop	-	DMA stop callback
+ *	@qc: ATA command
+ *
+ *	We loaded new timings in dma_start, as a result we need to restore
+ *	the PIO timings in dma_stop so that the next command issue gets the
+ *	right clock values.
+ */
+
+static void it821x_passthru_bmdma_stop(struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	struct ata_device *adev = qc->dev;
+	struct it821x_dev *itdev = ap->private_data;
+	int unit = adev->devno;
+
+	ata_bmdma_stop(qc);
+	if (itdev->mwdma[unit] != MWDMA_OFF)
+		it821x_program(ap, adev, itdev->pio[unit]);
+}
+
+
+/**
+ *	it821x_passthru_dev_select	-	Select master/slave
+ *	@ap: ATA port
+ *	@device: Device number (not pointer)
+ *
+ *	Device selection hook. If neccessary perform clock switching
+ */
+ 
+static void it821x_passthru_dev_select(struct ata_port *ap,
+				       unsigned int device)
+{
+	struct it821x_dev *itdev = ap->private_data;
+	if (itdev && device != itdev->last_device) {
+		struct ata_device *adev = &ap->device[device];
+		it821x_program(ap, adev, itdev->pio[adev->devno]);
+		itdev->last_device = device;
+	}
+	ata_std_dev_select(ap, device);
+}
+
+/**
+ *	it821x_smart_qc_issue_prot	-	wrap qc issue prot
+ *	@qc: command
+ *
+ *	Wrap the command issue sequence for the IT821x. We need to
+ *	perform out own device selection timing loads before the
+ *	usual happenings kick off
+ */
+ 
+static unsigned int it821x_smart_qc_issue_prot(struct ata_queued_cmd *qc)
+{
+	switch(qc->tf.command)
+	{
+		/* Commands the firmware supports */
+		case ATA_CMD_READ:
+		case ATA_CMD_READ_EXT:
+		case ATA_CMD_WRITE:
+		case ATA_CMD_WRITE_EXT:
+		case ATA_CMD_PIO_READ:
+		case ATA_CMD_PIO_READ_EXT:
+		case ATA_CMD_PIO_WRITE:
+		case ATA_CMD_PIO_WRITE_EXT:
+		case ATA_CMD_READ_MULTI:
+		case ATA_CMD_READ_MULTI_EXT:
+		case ATA_CMD_WRITE_MULTI:
+		case ATA_CMD_WRITE_MULTI_EXT:
+		case ATA_CMD_ID_ATA:
+		/* Arguably should just no-op this one */
+		case ATA_CMD_SET_FEATURES:
+			return ata_qc_issue_prot(qc);
+	}
+	printk(KERN_DEBUG "it821x: can't process command 0x%02X\n", qc->tf.command);
+	return AC_ERR_INVALID;
+}
+
+/**
+ *	it821x_passthru_qc_issue_prot	-	wrap qc issue prot
+ *	@qc: command
+ *
+ *	Wrap the command issue sequence for the IT821x. We need to
+ *	perform out own device selection timing loads before the
+ *	usual happenings kick off
+ */
+ 
+static unsigned int it821x_passthru_qc_issue_prot(struct ata_queued_cmd *qc)
+{
+	it821x_passthru_dev_select(qc->ap, qc->dev->devno);
+	return ata_qc_issue_prot(qc);
+}
+
+/**
+ *	it821x_smart_set_mode	-	mode setting
+ *	@ap: interface to set up
+ *
+ *	Use a non standard set_mode function. We don't want to be tuned.
+ *	The BIOS configured everything. Our job is not to fiddle. We
+ *	read the dma enabled bits from the PCI configuration of the device
+ *	and respect them. 
+ */
+ 
+static void it821x_smart_set_mode(struct ata_port *ap)
+{
+	int dma_enabled = 0;
+	int i;
+
+	/* Bits 5 and 6 indicate if DMA is active on master/slave */
+	/* It is possible that BMDMA isn't allocated */
+	if (ap->ioaddr.bmdma_addr)
+		dma_enabled = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
+	
+	for (i = 0; i < ATA_MAX_DEVICES; i++) {
+		struct ata_device *dev = &ap->device[i];
+		if (ata_dev_enabled(dev)) {
+			/* We don't really care */
+			dev->pio_mode = XFER_PIO_0;
+			dev->dma_mode = XFER_MW_DMA_0;
+			/* We do need the right mode information for DMA or PIO 
+			   and this comes from the current configuration flags */
+			if (dma_enabled & (1 << (5 + i))) {
+				dev->xfer_mode = XFER_MW_DMA_0;
+				dev->xfer_shift = ATA_SHIFT_MWDMA;
+				dev->flags &= ~ATA_DFLAG_PIO;
+			} else {
+				dev->xfer_mode = XFER_PIO_0;
+				dev->xfer_shift = ATA_SHIFT_PIO;
+				dev->flags |= ATA_DFLAG_PIO;
+			}
+		}
+	}
+}
+
+/**
+ *	it821x_dev_config	-	Called each device identify
+ *	@ap: ATA port
+ *	@adev: Device that has just been identified
+ *
+ *	Perform the initial setup needed for each device that is chip
+ *	special. In our case we need to lock the sector count to avoid
+ *	blowing the brains out of the firmware with large LBA48 requests
+ *
+ *	FIXME: When FUA appears we need to block FUA too. And SMART and
+ *	basically we need to filter commands for this chip.
+ */
+ 
+static void it821x_dev_config(struct ata_port *ap, struct ata_device *adev)
+{
+	unsigned char model_num[40];
+	char *s;
+	unsigned int len;
+
+	/* This block ought to be a library routine as it is in several
+	   drivers now */
+	   
+	ata_id_string(adev->id, model_num, ATA_ID_PROD_OFS,
+			  sizeof(model_num));
+	s = &model_num[0];
+	len = strnlen(s, sizeof(model_num));
+
+	/* ATAPI specifies that empty space is blank-filled; remove blanks */
+	while ((len > 0) && (s[len - 1] == ' ')) {
+		len--;
+		s[len] = 0;
+	}
+
+	if (adev->max_sectors > 255)
+		adev->max_sectors = 255;
+	
+	if (strstr(model_num, "Integrated Technology Express")) {
+		/* RAID mode */
+		printk(KERN_INFO "IT821x %sRAID%d volume",
+			adev->id[147]?"Bootable ":"",
+			adev->id[129]);
+		if (adev->id[129] != 1)
+			printk("(%dK stripe)", adev->id[146]);
+		printk(".\n");
+	}
+}
+
+
+/**
+ *	it821x_check_atapi_dma	-	ATAPI DMA handler
+ *	@qc: Command we are about to issue
+ *
+ *	Decide if this ATAPI command can be issued by DMA on this
+ *	controller. Return 0 if it can be.
+ */
+ 
+static int it821x_check_atapi_dma(struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	struct it821x_dev *itdev = ap->private_data;
+	
+	/* No ATAPI DMA in smart mode */
+	if (itdev->smart)
+		return -EOPNOTSUPP;
+	/* No ATAPI DMA on rev 10 */
+	if (itdev->timing10)
+		return -EOPNOTSUPP;
+	/* Cool */
+	return 0;
+}
+		
+
+/**
+ *	it821x_port_start	-	port setup
+ *	@ap: ATA port being set up
+ *
+ *	The it821x needs to maintain private data structures and also to
+ *	use the standard PCI interface which lacks support for this
+ *	functionality. We instead set up the private data on the port 
+ *	start hook, and tear it down on port stop
+ */
+ 
+static int it821x_port_start(struct ata_port *ap)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	struct it821x_dev *itdev;
+	u8 conf;
+
+	int ret = ata_port_start(ap);
+	if (ret < 0)
+		return ret;
+		
+	ap->private_data = kmalloc(sizeof(struct it821x_dev), GFP_KERNEL);
+	if (ap->private_data == NULL) {
+		ata_port_stop(ap);
+		return -ENOMEM;
+	}
+	
+	itdev = ap->private_data;
+	memset(itdev, 0, sizeof(struct it821x_dev));
+
+	pci_read_config_byte(pdev, 0x50, &conf);
+
+	if (conf & 1) {
+		itdev->smart = 1;
+		/* Long I/O's although allowed in LBA48 space cause the
+		   onboard firmware to enter the twighlight zone */
+		/* No ATAPI DMA in this mode either */
+	}
+	/* Pull the current clocks from 0x50 */
+	if (conf & (1 << (1 + ap->port_no)))
+		itdev->clock_mode = ATA_50;
+	else
+		itdev->clock_mode = ATA_66;
+
+	itdev->want[0][1] = ATA_ANY;
+	itdev->want[1][1] = ATA_ANY;
+	itdev->last_device = -1;
+
+	pci_read_config_byte(pdev, PCI_REVISION_ID, &conf);
+	if (conf == 0x10) {
+		itdev->timing10 = 1;
+		/* Need to disable ATAPI DMA for this case */
+		if (!itdev->smart)
+			printk(KERN_WARNING DRV_NAME": Revision 0x10, workarounds activated.\n");
+	}
+
+	return 0;
+}
+
+/**
+ *	it821x_port_stop	-	port shutdown
+ *	@ap: ATA port being removed
+ *
+ *	Release the private objects we added in it821x_port_start
+ */
+ 
+static void it821x_port_stop(struct ata_port *ap) {
+	kfree(ap->private_data);
+	ap->private_data = NULL;	/* We want an OOPS if we reuse this
+					   too late! */
+	ata_port_stop(ap);
+}
+
+static struct scsi_host_template it821x_sht = {
+	.module			= THIS_MODULE,
+	.name			= DRV_NAME,
+	.ioctl			= ata_scsi_ioctl,
+	.queuecommand		= ata_scsi_queuecmd,
+	.can_queue		= ATA_DEF_QUEUE,
+	.this_id		= ATA_SHT_THIS_ID,
+	.sg_tablesize		= LIBATA_MAX_PRD,
+	/* 255 sectors to begin with. This is locked in smart mode but not
+	   in pass through */
+	.max_sectors		= 255,
+	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
+	.emulated		= ATA_SHT_EMULATED,
+	.use_clustering		= ATA_SHT_USE_CLUSTERING,
+	.proc_name		= DRV_NAME,
+	.dma_boundary		= ATA_DMA_BOUNDARY,
+	.slave_configure	= ata_scsi_slave_config,
+	.bios_param		= ata_std_bios_param,
+};
+
+static struct ata_port_operations it821x_smart_port_ops = {
+	.set_mode	= it821x_smart_set_mode,
+	.port_disable	= ata_port_disable,
+	.tf_load	= ata_tf_load,
+	.tf_read	= ata_tf_read,
+	.mode_filter	= ata_pci_default_filter,
+	
+	.check_status 	= ata_check_status,
+	.check_atapi_dma= it821x_check_atapi_dma,
+	.exec_command	= ata_exec_command,
+	.dev_select 	= ata_std_dev_select,
+	.dev_config	= it821x_dev_config,
+
+	.freeze		= ata_bmdma_freeze,
+	.thaw		= ata_bmdma_thaw,
+	.error_handler	= it821x_error_handler,
+	.post_internal_cmd = ata_bmdma_post_internal_cmd,
+
+	.bmdma_setup 	= ata_bmdma_setup,
+	.bmdma_start 	= ata_bmdma_start,
+	.bmdma_stop	= ata_bmdma_stop,
+	.bmdma_status 	= ata_bmdma_status,
+
+	.qc_prep 	= ata_qc_prep,
+	.qc_issue	= it821x_smart_qc_issue_prot,
+	.eng_timeout	= ata_eng_timeout,
+	.data_xfer	= ata_pio_data_xfer,
+
+	.irq_handler	= ata_interrupt,
+	.irq_clear	= ata_bmdma_irq_clear,
+
+	.port_start	= it821x_port_start,
+	.port_stop	= it821x_port_stop,
+	.host_stop	= ata_host_stop
+};	
+
+static struct ata_port_operations it821x_passthru_port_ops = {
+	.port_disable	= ata_port_disable,
+	.set_piomode	= it821x_passthru_set_piomode,
+	.set_dmamode	= it821x_passthru_set_dmamode,
+	.mode_filter	= ata_pci_default_filter,
+	
+	.tf_load	= ata_tf_load,
+	.tf_read	= ata_tf_read,
+	.check_status 	= ata_check_status,
+	.exec_command	= ata_exec_command,
+	.check_atapi_dma= it821x_check_atapi_dma,
+	.dev_select 	= it821x_passthru_dev_select,
+
+	.freeze		= ata_bmdma_freeze,
+	.thaw		= ata_bmdma_thaw,
+	.error_handler	= it821x_error_handler,
+	.post_internal_cmd = ata_bmdma_post_internal_cmd,
+
+	.bmdma_setup 	= ata_bmdma_setup,
+	.bmdma_start 	= it821x_passthru_bmdma_start,
+	.bmdma_stop	= it821x_passthru_bmdma_stop,
+	.bmdma_status 	= ata_bmdma_status,
+
+	.qc_prep 	= ata_qc_prep,
+	.qc_issue	= it821x_passthru_qc_issue_prot,
+	.eng_timeout	= ata_eng_timeout,
+	.data_xfer	= ata_pio_data_xfer,
+
+	.irq_clear	= ata_bmdma_irq_clear,
+	.irq_handler	= ata_interrupt,
+
+	.port_start	= it821x_port_start,
+	.port_stop	= it821x_port_stop,
+	.host_stop	= ata_host_stop
+};	
+
+static void __devinit it821x_disable_raid(struct pci_dev *pdev)
+{
+	/* Reset local CPU, and set BIOS not ready */
+	pci_write_config_byte(pdev, 0x5E, 0x01);
+
+	/* Set to bypass mode, and reset PCI bus */
+	pci_write_config_byte(pdev, 0x50, 0x00);
+	pci_write_config_word(pdev, PCI_COMMAND,
+			      PCI_COMMAND_PARITY | PCI_COMMAND_IO |
+			      PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
+	pci_write_config_word(pdev, 0x40, 0xA0F3);
+
+	pci_write_config_dword(pdev,0x4C, 0x02040204);
+	pci_write_config_byte(pdev, 0x42, 0x36);
+	pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x20);
+}
+
+	
+static int it821x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	u8 conf;
+	
+	static struct ata_port_info info_smart = {
+		.sht = &it821x_sht,
+		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+		.pio_mask = 0x1f,
+		.mwdma_mask = 0x07,
+		.port_ops = &it821x_smart_port_ops
+	};
+	static struct ata_port_info info_passthru = {
+		.sht = &it821x_sht,
+		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+		.pio_mask = 0x1f,
+		.mwdma_mask = 0x07,
+		.udma_mask = 0x7f,
+		.port_ops = &it821x_passthru_port_ops
+	};
+	static struct ata_port_info *port_info[2];
+	
+	static char *mode[2] = { "pass through", "smart" };
+
+	/* Force the card into bypass mode if so requested */
+	if (it8212_noraid) {
+		printk(KERN_INFO DRV_NAME ": forcing bypass mode.\n");
+		it821x_disable_raid(pdev);
+	}
+	pci_read_config_byte(pdev, 0x50, &conf);
+	conf &= 1;
+	
+	printk(KERN_INFO DRV_NAME ": controller in %s mode.\n", mode[conf]);
+	if (conf == 0)
+		port_info[0] = port_info[1] = &info_passthru;
+	else
+		port_info[0] = port_info[1] = &info_smart;
+	
+	return ata_pci_init_one(pdev, port_info, 2);
+}
+
+static struct pci_device_id it821x[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8211), },
+	{ PCI_DEVICE(PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8212), },
+	{ 0, },
+};
+
+static struct pci_driver it821x_pci_driver = {
+        .name 		= DRV_NAME,
+	.id_table	= it821x,
+	.probe 		= it821x_init_one,
+	.remove		= ata_pci_remove_one
+};
+
+static int __init it821x_init(void)
+{
+	return pci_register_driver(&it821x_pci_driver);
+}
+
+
+static void __exit it821x_exit(void)
+{
+	pci_unregister_driver(&it821x_pci_driver);
+}
+
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for the IT8211/IT8212 IDE RAID controller");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, it821x);
+MODULE_VERSION(DRV_VERSION);
+
+
+module_param_named(noraid, it8212_noraid, int, S_IRUGO);
+MODULE_PARM_DESC(it8212_noraid, "Force card into bypass mode");
+
+module_init(it821x_init);
+module_exit(it821x_exit);