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SubjectPATCH: it8212 backport for Bartlomiej IDE (Correct diff)
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On Llu, 2005-06-20 at 21:39, Alan Cox wrote:
> This lets you throw out the iteraid stuff that has ended up back in due
> to stupid goings on in the IDE world. Its the same heavily tested code
> shipped in Fedora/Red Hat products but without the other dependancies on
> the Bartlomiej IDE layer.
>
> Pre-requisite: the ide-disk patch I sent to handle pure LBA devices.
>
> Obviously you lose things like hot unplug with the Bartlomiej IDE layer
> at the moment but that won't matter to most users.
>
> The patch does the following
> - Add IT8211/12 to pci_ids.h
> - Add Makefile/Kconfig entry
> - Add it8212 driver
*
* No core IDE code is touched by this diff
*
* Signed-off-by: Alan Cox <alan@redhat.com>
* Embedded system testing and the ability to force raid mode off
by David
* Howells
*
* Made possible by the ite reference code, documentation and also
several
> clarifications and pieces of assistance provided by ITE themselves

Attached the wrong diff. Please use the one below

diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.12/drivers/ide/Kconfig linux-2.6.12/drivers/ide/Kconfig
--- linux.vanilla-2.6.12/drivers/ide/Kconfig 2005-06-19 11:30:47.000000000 +0100
+++ linux-2.6.12/drivers/ide/Kconfig 2005-06-20 21:24:36.762827768 +0100
@@ -606,6 +606,12 @@
<http://www.ite.com.tw/ia/brief_it8172bsp.htm>; picture of the
board at <http://www.mvista.com/partners/semiconductor/ite.html>.

+config BLK_DEV_IT821X
+ tristate "IT821X IDE support"
+ help
+ This driver adds support for the ITE 8211 IDE controller and the
+ IT 8212 IDE RAID controller in both RAID and pass-through mode.
+
config BLK_DEV_NS87415
tristate "NS87415 chipset support"
help
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.12/drivers/ide/pci/it821x.c linux-2.6.12/drivers/ide/pci/it821x.c
--- linux.vanilla-2.6.12/drivers/ide/pci/it821x.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.12/drivers/ide/pci/it821x.c 2005-06-20 21:27:07.000000000 +0100
@@ -0,0 +1,812 @@
+
+/*
+ * 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 UDMA is ok but not MWDMA it seems
+ * - RAID configuration ioctls
+ * - Move to libata once it grows up
+ */
+
+#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>
+
+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) */
+};
+
+#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_program - program the PIO/MWDMA registers
+ * @drive: drive to tune
+ *
+ * Program the PIO/MWDMA timing for this channel according to the
+ * current clock.
+ */
+
+static void it821x_program(ide_drive_t *drive, u16 timing)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct it821x_dev *itdev = ide_get_hwifdata(hwif);
+ int channel = hwif->channel;
+ u8 conf;
+
+ /* Program PIO/MWDMA timing bits */
+ if(itdev->clock_mode == ATA_66)
+ conf = timing >> 8;
+ else
+ conf = timing & 0xFF;
+ pci_write_config_byte(hwif->pci_dev, 0x54 + 4 * channel, conf);
+}
+
+/**
+ * it821x_program_udma - program the UDMA registers
+ * @drive: drive to tune
+ *
+ * Program the UDMA timing for this drive according to the
+ * current clock.
+ */
+
+static void it821x_program_udma(ide_drive_t *drive, u16 timing)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct it821x_dev *itdev = ide_get_hwifdata(hwif);
+ int channel = hwif->channel;
+ int unit = drive->select.b.unit;
+ 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(hwif->pci_dev, 0x56 + 4 * channel + unit, conf);
+ else {
+ pci_write_config_byte(hwif->pci_dev, 0x56 + 4 * channel, conf);
+ pci_write_config_byte(hwif->pci_dev, 0x56 + 4 * channel + 1, conf);
+ }
+}
+
+
+/**
+ * it821x_clock_strategy
+ * @hwif: hardware interface
+ *
+ * Select between the 50 and 66Mhz base clocks to get the best
+ * results for this interface.
+ */
+
+static void it821x_clock_strategy(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct it821x_dev *itdev = ide_get_hwifdata(hwif);
+
+ u8 unit = drive->select.b.unit;
+ ide_drive_t *pair = &hwif->drives[1-unit];
+
+ int clock, altclock;
+ u8 v;
+ int sel = 0;
+
+ 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(hwif->pci_dev, 0x50, &v);
+ v &= ~(1 << (1 + hwif->channel));
+ v |= sel << (1 + hwif->channel);
+ pci_write_config_byte(hwif->pci_dev, 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(pair, itdev->udma[1-unit]);
+ it821x_program(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(drive, itdev->udma[unit]);
+ it821x_program(drive, itdev->pio[unit]);
+ }
+}
+
+/**
+ * it821x_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 it821x_ratemask (ide_drive_t *drive)
+{
+ u8 mode = 4;
+ if (!eighty_ninty_three(drive))
+ mode = min(mode, (u8)1);
+ return mode;
+}
+
+/**
+ * it821x_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. By the time we are called the mode has been
+ * modified as neccessary to handle the absence of seperate
+ * master/slave timers for MWDMA/PIO.
+ *
+ * This code is only used in pass through mode.
+ */
+
+static void it821x_tuneproc (ide_drive_t *drive, byte mode_wanted)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct it821x_dev *itdev = ide_get_hwifdata(hwif);
+ int unit = drive->select.b.unit;
+
+ /* Spec says 89 ref driver uses 88 */
+ static u16 pio[] = { 0xAA88, 0xA382, 0xA181, 0x3332, 0x3121 };
+ static u8 pio_want[] = { ATA_66, ATA_66, ATA_66, ATA_66, ATA_ANY };
+
+ if(itdev->smart)
+ return;
+
+ /* 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(drive);
+ it821x_program(drive, itdev->pio[unit]);
+}
+
+/**
+ * it821x_tune_mwdma - tune a channel for MWDMA
+ * @drive: drive to set up
+ * @mode_wanted: the target operating mode
+ *
+ * Load the timing settings for this device mode into the
+ * controller when doing MWDMA in pass through mode. The caller
+ * must manage the whole lack of per device MWDMA/PIO timings and
+ * the shared MWDMA/PIO timing register.
+ */
+
+static void it821x_tune_mwdma (ide_drive_t *drive, byte mode_wanted)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct it821x_dev *itdev = (void *)ide_get_hwifdata(hwif);
+ int unit = drive->select.b.unit;
+ int channel = hwif->channel;
+ u8 conf;
+
+ static u16 dma[] = { 0x8866, 0x3222, 0x3121 };
+ static u8 mwdma_want[] = { ATA_ANY, ATA_66, ATA_ANY };
+
+ 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(hwif->pci_dev, 0x50, &conf);
+ if(itdev->timing10)
+ conf |= channel ? 0x60: 0x18;
+ else
+ conf |= 1 << (3 + 2 * channel + unit);
+ pci_write_config_byte(hwif->pci_dev, 0x50, conf);
+
+ it821x_clock_strategy(drive);
+ /* FIXME: do we need to program this ? */
+ /* it821x_program(drive, itdev->mwdma[unit]); */
+}
+
+/**
+ * it821x_tune_udma - tune a channel for UDMA
+ * @drive: drive to set up
+ * @mode_wanted: the target operating mode
+ *
+ * Load the timing settings for this device mode into the
+ * controller when doing UDMA modes in pass through.
+ */
+
+static void it821x_tune_udma (ide_drive_t *drive, byte mode_wanted)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct it821x_dev *itdev = ide_get_hwifdata(hwif);
+ int unit = drive->select.b.unit;
+ int channel = hwif->channel;
+ u8 conf;
+
+ static u16 udma[] = { 0x4433, 0x4231, 0x3121, 0x2121, 0x1111, 0x2211, 0x1111 };
+ static u8 udma_want[] = { ATA_ANY, ATA_50, ATA_ANY, ATA_66, ATA_66, ATA_50, ATA_66 };
+
+ 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(hwif->pci_dev, 0x50, &conf);
+ if(itdev->timing10)
+ conf &= channel ? 0x9F: 0xE7;
+ else
+ conf &= ~ (1 << (3 + 2 * channel + unit));
+ pci_write_config_byte(hwif->pci_dev, 0x50, conf);
+
+ it821x_clock_strategy(drive);
+ it821x_program_udma(drive, itdev->udma[unit]);
+
+}
+
+/**
+ * config_it821x_chipset_for_pio - set drive timings
+ * @drive: drive to tune
+ * @speed we want
+ *
+ * Compute the best pio mode we can for a given device. We must
+ * pick a speed that does not cause problems with the other device
+ * on the cable.
+ */
+
+static void config_it821x_chipset_for_pio (ide_drive_t *drive, byte set_speed)
+{
+ u8 unit = drive->select.b.unit;
+ ide_hwif_t *hwif = drive->hwif;
+ ide_drive_t *pair = &hwif->drives[1-unit];
+ u8 speed = 0, set_pio = ide_get_best_pio_mode(drive, 255, 5, NULL);
+ u8 pair_pio;
+
+ /* We have to deal with this mess in pairs */
+ if(pair != NULL) {
+ pair_pio = ide_get_best_pio_mode(pair, 255, 5, NULL);
+ /* Trim PIO to the slowest of the master/slave */
+ if(pair_pio < set_pio)
+ set_pio = pair_pio;
+ }
+ it821x_tuneproc(drive, set_pio);
+ speed = XFER_PIO_0 + set_pio;
+ /* XXX - We trim to the lowest of the pair so the other drive
+ will always be fine at this point until we do hotplug passthru */
+
+ if (set_speed)
+ (void) ide_config_drive_speed(drive, speed);
+}
+
+/**
+ * it821x_dma_read - DMA hook
+ * @drive: drive for DMA
+ *
+ * The IT821x has a single timing register for MWDMA and for PIO
+ * operations. As we flip back and forth we have to reload the
+ * clock. In addition the rev 0x10 device only works if the same
+ * timing value is loaded into the master and slave UDMA clock
+ * so we must also reload that.
+ *
+ * FIXME: we could figure out in advance if we need to do reloads
+ */
+
+static void it821x_dma_start(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct it821x_dev *itdev = ide_get_hwifdata(hwif);
+ int unit = drive->select.b.unit;
+ if(itdev->mwdma[unit] != MWDMA_OFF)
+ it821x_program(drive, itdev->mwdma[unit]);
+ else if(itdev->udma[unit] != UDMA_OFF && itdev->timing10)
+ it821x_program_udma(drive, itdev->udma[unit]);
+ ide_dma_start(drive);
+}
+
+/**
+ * it821x_dma_write - DMA hook
+ * @drive: drive for DMA stop
+ *
+ * The IT821x has a single timing register for MWDMA and for PIO
+ * operations. As we flip back and forth we have to reload the
+ * clock.
+ */
+
+static int it821x_dma_end(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ int unit = drive->select.b.unit;
+ struct it821x_dev *itdev = ide_get_hwifdata(hwif);
+ int ret = __ide_dma_end(drive);
+ if(itdev->mwdma[unit] != MWDMA_OFF)
+ it821x_program(drive, itdev->pio[unit]);
+ return ret;
+}
+
+
+/**
+ * it821x_tune_chipset - set controller timings
+ * @drive: Drive to set up
+ * @xferspeed: speed we want to achieve
+ *
+ * Tune the ITE 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 it821x_tune_chipset (ide_drive_t *drive, byte xferspeed)
+{
+
+ ide_hwif_t *hwif = drive->hwif;
+ struct it821x_dev *itdev = ide_get_hwifdata(hwif);
+ u8 speed = ide_rate_filter(it821x_ratemask(drive), xferspeed);
+
+ if(!itdev->smart) {
+ switch(speed) {
+ case XFER_PIO_4:
+ case XFER_PIO_3:
+ case XFER_PIO_2:
+ case XFER_PIO_1:
+ case XFER_PIO_0:
+ it821x_tuneproc(drive, (speed - XFER_PIO_0));
+ break;
+ /* MWDMA tuning is really hard because our MWDMA and PIO
+ timings are kept in the same place. We can switch in the
+ host dma on/off callbacks */
+ case XFER_MW_DMA_2:
+ case XFER_MW_DMA_1:
+ case XFER_MW_DMA_0:
+ it821x_tune_mwdma(drive, (speed - XFER_MW_DMA_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:
+ it821x_tune_udma(drive, (speed - XFER_UDMA_0));
+ break;
+ default:
+ return 1;
+ }
+ }
+ /*
+ * In smart mode the clocking is done by the host controller
+ * snooping the mode we picked. The rest of it is not our problem
+ */
+ 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.
+ */
+
+static int config_chipset_for_dma (ide_drive_t *drive)
+{
+ u8 speed = ide_dma_speed(drive, it821x_ratemask(drive));
+
+ config_it821x_chipset_for_pio(drive, !speed);
+ it821x_tune_chipset(drive, speed);
+ return ide_dma_enable(drive);
+}
+
+/**
+ * it821x_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 it821x_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_it821x_chipset_for_pio(drive, 1);
+ return hwif->ide_dma_off_quietly(drive);
+}
+
+/**
+ * ata66_it821x - check for 80 pin cable
+ * @hwif: interface to check
+ *
+ * Check for the presence of an ATA66 capable cable on the
+ * interface. Problematic as it seems some cards don't have
+ * the needed logic onboard.
+ */
+
+static unsigned int __devinit ata66_it821x(ide_hwif_t *hwif)
+{
+ /* The reference driver also only does disk side */
+ return 1;
+}
+
+/**
+ * it821x_fixup - post init callback
+ * @hwif: interface
+ *
+ * This callback is run after the drives have been probed but
+ * before anything gets attached. It allows drivers to do any
+ * final tuning that is needed, or fixups to work around bugs.
+ */
+
+static void __devinit it821x_fixups(ide_hwif_t *hwif)
+{
+ struct it821x_dev *itdev = ide_get_hwifdata(hwif);
+ int i;
+
+ if(!itdev->smart) {
+ /*
+ * If we are in pass through mode then not much
+ * needs to be done, but we do bother to clear the
+ * IRQ mask as we may well be in PIO (eg rev 0x10)
+ * for now and we know unmasking is safe on this chipset.
+ */
+ for (i = 0; i < 2; i++) {
+ ide_drive_t *drive = &hwif->drives[i];
+ if(drive->present)
+ drive->unmask = 1;
+ }
+ return;
+ }
+ /*
+ * Perform fixups on smart mode. We need to "lose" some
+ * capabilities the firmware lacks but does not filter, and
+ * also patch up some capability bits that it forgets to set
+ * in RAID mode.
+ */
+
+ for(i = 0; i < 2; i++) {
+ ide_drive_t *drive = &hwif->drives[i];
+ struct hd_driveid *id;
+ u16 *idbits;
+
+ if(!drive->present)
+ continue;
+ id = drive->id;
+ idbits = (u16 *)drive->id;
+
+ /* Check for RAID v native */
+ if(strstr(id->model, "Integrated Technology Express")) {
+ /* In raid mode the ident block is slightly buggy
+ We need to set the bits so that the IDE layer knows
+ LBA28. LBA48 and DMA ar valid */
+ id->capability |= 3; /* LBA28, DMA */
+ id->command_set_2 |= 0x0400; /* LBA48 valid */
+ id->cfs_enable_2 |= 0x0400; /* LBA48 on */
+ /* Reporting logic */
+ printk(KERN_INFO "%s: IT8212 %sRAID %d volume",
+ drive->name,
+ idbits[147] ? "Bootable ":"",
+ idbits[129]);
+ if(idbits[129] != 1)
+ printk("(%dK stripe)", idbits[146]);
+ printk(".\n");
+ /* Now the core code will have wrongly decided no DMA
+ so we need to fix this */
+ hwif->ide_dma_off_quietly(drive);
+#ifdef CONFIG_IDEDMA_ONLYDISK
+ if (drive->media == ide_disk)
+#endif
+ hwif->ide_dma_check(drive);
+ } else {
+ /* Non RAID volume. Fixups to stop the core code
+ doing unsupported things */
+ id->field_valid &= 1;
+ id->queue_depth = 0;
+ id->command_set_1 = 0;
+ id->command_set_2 &= 0xC400;
+ id->cfsse &= 0xC000;
+ id->cfs_enable_1 = 0;
+ id->cfs_enable_2 &= 0xC400;
+ id->csf_default &= 0xC000;
+ id->word127 = 0;
+ id->dlf = 0;
+ id->csfo = 0;
+ id->cfa_power = 0;
+ printk(KERN_INFO "%s: Performing identify fixups.\n",
+ drive->name);
+ }
+ }
+
+}
+
+/**
+ * init_hwif_it821x - set up hwif structs
+ * @hwif: interface to set up
+ *
+ * We do the basic set up of the interface structure. The IT8212
+ * requires several custom handlers so we override the default
+ * ide DMA handlers appropriately
+ */
+
+static void __devinit init_hwif_it821x(ide_hwif_t *hwif)
+{
+ struct it821x_dev *idev = kmalloc(sizeof(struct it821x_dev), GFP_KERNEL);
+ u8 conf;
+
+ if(idev == NULL) {
+ printk(KERN_ERR "it821x: out of memory, falling back to legacy behaviour.\n");
+ goto fallback;
+ }
+ memset(idev, 0, sizeof(struct it821x_dev));
+ ide_set_hwifdata(hwif, idev);
+
+ pci_read_config_byte(hwif->pci_dev, 0x50, &conf);
+ if(conf & 1) {
+ idev->smart = 1;
+ hwif->atapi_dma = 0;
+ /* Long I/O's although allowed in LBA48 space cause the
+ onboard firmware to enter the twighlight zone */
+ hwif->rqsize = 256;
+ }
+
+ /* Pull the current clocks from 0x50 also */
+ if (conf & (1 << (1 + hwif->channel)))
+ idev->clock_mode = ATA_50;
+ else
+ idev->clock_mode = ATA_66;
+
+ idev->want[0][1] = ATA_ANY;
+ idev->want[1][1] = ATA_ANY;
+
+ /*
+ * Not in the docs but according to the reference driver
+ * this is neccessary.
+ */
+
+ pci_read_config_byte(hwif->pci_dev, 0x08, &conf);
+ if(conf == 0x10) {
+ idev->timing10 = 1;
+ hwif->atapi_dma = 0;
+ if(!idev->smart)
+ printk(KERN_WARNING "it821x: Revision 0x10, workarounds activated.\n");
+ }
+
+ hwif->speedproc = &it821x_tune_chipset;
+ hwif->tuneproc = &it821x_tuneproc;
+
+ /* MWDMA/PIO clock switching for pass through mode */
+ if(!idev->smart) {
+ hwif->dma_start = &it821x_dma_start;
+ hwif->ide_dma_end = &it821x_dma_end;
+ }
+
+ hwif->drives[0].autotune = 1;
+ hwif->drives[1].autotune = 1;
+
+ if (!hwif->dma_base)
+ goto fallback;
+
+ hwif->ultra_mask = 0x7f;
+ hwif->mwdma_mask = 0x07;
+ hwif->swdma_mask = 0x07;
+
+ hwif->ide_dma_check = &it821x_config_drive_for_dma;
+ if (!(hwif->udma_four))
+ hwif->udma_four = ata66_it821x(hwif);
+
+ /*
+ * 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;
+ return;
+fallback:
+ hwif->autodma = 0;
+ return;
+}
+
+static void __devinit it8212_disable_raid(struct pci_dev *dev)
+{
+ /* Reset local CPU, and set BIOS not ready */
+ pci_write_config_byte(dev, 0x5E, 0x01);
+
+ /* Set to bypass mode, and reset PCI bus */
+ pci_write_config_byte(dev, 0x50, 0x00);
+ pci_write_config_word(dev, PCI_COMMAND,
+ PCI_COMMAND_PARITY | PCI_COMMAND_IO |
+ PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
+ pci_write_config_word(dev, 0x40, 0xA0F3);
+
+ pci_write_config_dword(dev,0x4C, 0x02040204);
+ pci_write_config_byte(dev, 0x42, 0x36);
+ pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0);
+}
+
+static unsigned int __devinit init_chipset_it821x(struct pci_dev *dev, const char *name)
+{
+ u8 conf;
+ static char *mode[2] = { "pass through", "smart" };
+
+ /* Force the card into bypass mode if so requested */
+ if (it8212_noraid) {
+ printk(KERN_INFO "it8212: forcing bypass mode.\n");
+ it8212_disable_raid(dev);
+ }
+ pci_read_config_byte(dev, 0x50, &conf);
+ printk(KERN_INFO "it821x: controller in %s mode.\n", mode[conf & 1]);
+ return 0;
+}
+
+
+#define DECLARE_ITE_DEV(name_str) \
+ { \
+ .name = name_str, \
+ .init_chipset = init_chipset_it821x, \
+ .init_hwif = init_hwif_it821x, \
+ .channels = 2, \
+ .autodma = AUTODMA, \
+ .bootable = ON_BOARD, \
+ .fixup = it821x_fixups \
+ }
+
+static ide_pci_device_t it821x_chipsets[] __devinitdata = {
+ /* 0 */ DECLARE_ITE_DEV("IT8212"),
+};
+
+/**
+ * it821x_init_one - pci layer discovery entry
+ * @dev: PCI device
+ * @id: ident table entry
+ *
+ * Called by the PCI code when it finds an ITE821x controller.
+ * We then use the IDE PCI generic helper to do most of the work.
+ */
+
+static int __devinit it821x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+ ide_setup_pci_device(dev, &it821x_chipsets[id->driver_data]);
+ return 0;
+}
+
+static struct pci_device_id it821x_pci_tbl[] = {
+ { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8211, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8212, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ { 0, },
+};
+
+MODULE_DEVICE_TABLE(pci, it821x_pci_tbl);
+
+static struct pci_driver driver = {
+ .name = "ITE821x IDE",
+ .id_table = it821x_pci_tbl,
+ .probe = it821x_init_one,
+};
+
+static int __init it821x_ide_init(void)
+{
+ return ide_pci_register_driver(&driver);
+}
+
+module_init(it821x_ide_init);
+
+module_param_named(noraid, it8212_noraid, int, S_IRUGO);
+MODULE_PARM_DESC(it8212_noraid, "Force card into bypass mode");
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("PCI driver module for the ITE 821x");
+MODULE_LICENSE("GPL");
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.12/drivers/ide/pci/Makefile linux-2.6.12/drivers/ide/pci/Makefile
--- linux.vanilla-2.6.12/drivers/ide/pci/Makefile 2005-06-19 11:21:23.000000000 +0100
+++ linux-2.6.12/drivers/ide/pci/Makefile 2005-06-20 20:41:44.000000000 +0100
@@ -12,6 +12,7 @@
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-$(CONFIG_BLK_DEV_NS87415) += ns87415.o
obj-$(CONFIG_BLK_DEV_OPTI621) += opti621.o
obj-$(CONFIG_BLK_DEV_PDC202XX_OLD) += pdc202xx_old.o
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.12/include/linux/pci_ids.h linux-2.6.12/include/linux/pci_ids.h
--- linux.vanilla-2.6.12/include/linux/pci_ids.h 2005-06-19 11:30:59.000000000 +0100
+++ linux-2.6.12/include/linux/pci_ids.h 2005-06-20 21:25:36.400761424 +0100
@@ -1810,6 +1810,8 @@
#define PCI_VENDOR_ID_ITE 0x1283
#define PCI_DEVICE_ID_ITE_IT8172G 0x8172
#define PCI_DEVICE_ID_ITE_IT8172G_AUDIO 0x0801
+#define PCI_DEVICE_ID_ITE_8211 0x8211
+#define PCI_DEVICE_ID_ITE_8212 0x8212
#define PCI_DEVICE_ID_ITE_8872 0x8872
#define PCI_DEVICE_ID_ITE_IT8330G_0 0xe886

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