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linux-stable-rt/drivers/ata/pata_it821x.c

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/*
* pata_it821x.c - IT821x PATA for new ATA layer
* (C) 2005 Red Hat Inc
* Alan Cox <alan@lxorguk.ukuu.org.uk>
* (C) 2007 Bartlomiej Zolnierkiewicz
*
* based upon
*
* it821x.c
*
* linux/drivers/ide/pci/it821x.c Version 0.09 December 2004
*
* Copyright (C) 2004 Red Hat
*
* 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
* - 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 "0.4.0"
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 necessary 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
* @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 necessary 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->link.device[device];
it821x_program(ap, adev, itdev->pio[adev->devno]);
itdev->last_device = device;
}
ata_sff_dev_select(ap, device);
}
/**
* it821x_smart_qc_issue - 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(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:
case ATA_CMD_INIT_DEV_PARAMS:
case 0xFC: /* Internal 'report rebuild state' */
/* Arguably should just no-op this one */
case ATA_CMD_SET_FEATURES:
return ata_sff_qc_issue(qc);
}
printk(KERN_DEBUG "it821x: can't process command 0x%02X\n", qc->tf.command);
return AC_ERR_DEV;
}
/**
* it821x_passthru_qc_issue - 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(struct ata_queued_cmd *qc)
{
it821x_passthru_dev_select(qc->ap, qc->dev->devno);
return ata_sff_qc_issue(qc);
}
/**
* it821x_smart_set_mode - mode setting
* @link: interface to set up
* @unused: device that failed (error only)
*
* 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 int it821x_smart_set_mode(struct ata_link *link, struct ata_device **unused)
{
struct ata_device *dev;
ata_for_each_dev(dev, link, ENABLED) {
/* 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 (ata_id_has_dma(dev->id)) {
ata_dev_printk(dev, KERN_INFO, "configured for DMA\n");
dev->xfer_mode = XFER_MW_DMA_0;
dev->xfer_shift = ATA_SHIFT_MWDMA;
dev->flags &= ~ATA_DFLAG_PIO;
} else {
ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
dev->xfer_mode = XFER_PIO_0;
dev->xfer_shift = ATA_SHIFT_PIO;
dev->flags |= ATA_DFLAG_PIO;
}
}
return 0;
}
/**
* it821x_dev_config - Called each device identify
* @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_device *adev)
{
unsigned char model_num[ATA_ID_PROD_LEN + 1];
ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));
if (adev->max_sectors > 255)
adev->max_sectors = 255;
if (strstr(model_num, "Integrated Technology Express")) {
/* RAID mode */
ata_dev_printk(adev, KERN_INFO, "%sRAID%d volume",
adev->id[147]?"Bootable ":"",
adev->id[129]);
if (adev->id[129] != 1)
printk("(%dK stripe)", adev->id[146]);
printk(".\n");
}
/* This is a controller firmware triggered funny, don't
report the drive faulty! */
adev->horkage &= ~ATA_HORKAGE_DIAGNOSTIC;
/* No HPA in 'smart' mode */
adev->horkage |= ATA_HORKAGE_BROKEN_HPA;
}
/**
* it821x_read_id - Hack identify data up
* @adev: device to read
* @tf: proposed taskfile
* @id: buffer for returned ident data
*
* Query the devices on this firmware driven port and slightly
* mash the identify data to stop us and common tools trying to
* use features not firmware supported. The firmware itself does
* some masking (eg SMART) but not enough.
*/
static unsigned int it821x_read_id(struct ata_device *adev,
struct ata_taskfile *tf, u16 *id)
{
unsigned int err_mask;
unsigned char model_num[ATA_ID_PROD_LEN + 1];
err_mask = ata_do_dev_read_id(adev, tf, id);
if (err_mask)
return err_mask;
ata_id_c_string(id, model_num, ATA_ID_PROD, sizeof(model_num));
id[83] &= ~(1 << 12); /* Cache flush is firmware handled */
id[83] &= ~(1 << 13); /* Ditto for LBA48 flushes */
id[84] &= ~(1 << 6); /* No FUA */
id[85] &= ~(1 << 10); /* No HPA */
id[76] = 0; /* No NCQ/AN etc */
if (strstr(model_num, "Integrated Technology Express")) {
/* Set feature bits the firmware neglects */
id[49] |= 0x0300; /* LBA, DMA */
id[83] &= 0x7FFF;
id[83] |= 0x4400; /* Word 83 is valid and LBA48 */
id[86] |= 0x0400; /* LBA48 on */
id[ATA_ID_MAJOR_VER] |= 0x1F;
}
return err_mask;
}
/**
* 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;
/* Only use dma for transfers to/from the media. */
if (ata_qc_raw_nbytes(qc) < 2048)
return -EOPNOTSUPP;
/* 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_display_disk - display disk setup
* @n: Device number
* @buf: Buffer block from firmware
*
* Produce a nice informative display of the device setup as provided
* by the firmware.
*/
static void it821x_display_disk(int n, u8 *buf)
{
unsigned char id[41];
int mode = 0;
char *mtype = "";
char mbuf[8];
char *cbl = "(40 wire cable)";
static const char *types[5] = {
"RAID0", "RAID1" "RAID 0+1", "JBOD", "DISK"
};
if (buf[52] > 4) /* No Disk */
return;
ata_id_c_string((u16 *)buf, id, 0, 41);
if (buf[51]) {
mode = ffs(buf[51]);
mtype = "UDMA";
} else if (buf[49]) {
mode = ffs(buf[49]);
mtype = "MWDMA";
}
if (buf[76])
cbl = "";
if (mode)
snprintf(mbuf, 8, "%5s%d", mtype, mode - 1);
else
strcpy(mbuf, "PIO");
if (buf[52] == 4)
printk(KERN_INFO "%d: %-6s %-8s %s %s\n",
n, mbuf, types[buf[52]], id, cbl);
else
printk(KERN_INFO "%d: %-6s %-8s Volume: %1d %s %s\n",
n, mbuf, types[buf[52]], buf[53], id, cbl);
if (buf[125] < 100)
printk(KERN_INFO "%d: Rebuilding: %d%%\n", n, buf[125]);
}
/**
* it821x_firmware_command - issue firmware command
* @ap: IT821x port to interrogate
* @cmd: command
* @len: length
*
* Issue firmware commands expecting data back from the controller. We
* use this to issue commands that do not go via the normal paths. Other
* commands such as 0xFC can be issued normally.
*/
static u8 *it821x_firmware_command(struct ata_port *ap, u8 cmd, int len)
{
u8 status;
int n = 0;
u16 *buf = kmalloc(len, GFP_KERNEL);
if (buf == NULL) {
printk(KERN_ERR "it821x_firmware_command: Out of memory\n");
return NULL;
}
/* This isn't quite a normal ATA command as we are talking to the
firmware not the drives */
ap->ctl |= ATA_NIEN;
iowrite8(ap->ctl, ap->ioaddr.ctl_addr);
ata_wait_idle(ap);
iowrite8(ATA_DEVICE_OBS, ap->ioaddr.device_addr);
iowrite8(cmd, ap->ioaddr.command_addr);
udelay(1);
/* This should be almost immediate but a little paranoia goes a long
way. */
while(n++ < 10) {
status = ioread8(ap->ioaddr.status_addr);
if (status & ATA_ERR) {
kfree(buf);
printk(KERN_ERR "it821x_firmware_command: rejected\n");
return NULL;
}
if (status & ATA_DRQ) {
ioread16_rep(ap->ioaddr.data_addr, buf, len/2);
return (u8 *)buf;
}
mdelay(1);
}
kfree(buf);
printk(KERN_ERR "it821x_firmware_command: timeout\n");
return NULL;
}
/**
* it821x_probe_firmware - firmware reporting/setup
* @ap: IT821x port being probed
*
* Probe the firmware of the controller by issuing firmware command
* 0xFA and analysing the returned data.
*/
static void it821x_probe_firmware(struct ata_port *ap)
{
u8 *buf;
int i;
/* This is a bit ugly as we can't just issue a task file to a device
as this is controller magic */
buf = it821x_firmware_command(ap, 0xFA, 512);
if (buf != NULL) {
printk(KERN_INFO "pata_it821x: Firmware %02X/%02X/%02X%02X\n",
buf[505],
buf[506],
buf[507],
buf[508]);
for (i = 0; i < 4; i++)
it821x_display_disk(i, buf + 128 * i);
kfree(buf);
}
}
/**
* 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_sff_port_start(ap);
if (ret < 0)
return ret;
itdev = devm_kzalloc(&pdev->dev, sizeof(struct it821x_dev), GFP_KERNEL);
if (itdev == NULL)
return -ENOMEM;
ap->private_data = itdev;
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 */
if (ap->port_no == 0)
it821x_probe_firmware(ap);
}
/* 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;
if (pdev->revision == 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_rdc_cable - Cable detect for RDC1010
* @ap: port we are checking
*
* Return the RDC1010 cable type. Unlike the IT821x we know how to do
* this and can do host side cable detect
*/
static int it821x_rdc_cable(struct ata_port *ap)
{
u16 r40;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
pci_read_config_word(pdev, 0x40, &r40);
if (r40 & (1 << (2 + ap->port_no)))
return ATA_CBL_PATA40;
return ATA_CBL_PATA80;
}
static struct scsi_host_template it821x_sht = {
ATA_BMDMA_SHT(DRV_NAME),
};
static struct ata_port_operations it821x_smart_port_ops = {
.inherits = &ata_bmdma_port_ops,
.check_atapi_dma= it821x_check_atapi_dma,
.qc_issue = it821x_smart_qc_issue,
.cable_detect = ata_cable_80wire,
.set_mode = it821x_smart_set_mode,
.dev_config = it821x_dev_config,
.read_id = it821x_read_id,
.port_start = it821x_port_start,
};
static struct ata_port_operations it821x_passthru_port_ops = {
.inherits = &ata_bmdma_port_ops,
.check_atapi_dma= it821x_check_atapi_dma,
.sff_dev_select = it821x_passthru_dev_select,
.bmdma_start = it821x_passthru_bmdma_start,
.bmdma_stop = it821x_passthru_bmdma_stop,
.qc_issue = it821x_passthru_qc_issue,
.cable_detect = ata_cable_unknown,
.set_piomode = it821x_passthru_set_piomode,
.set_dmamode = it821x_passthru_set_dmamode,
.port_start = it821x_port_start,
};
static struct ata_port_operations it821x_rdc_port_ops = {
.inherits = &ata_bmdma_port_ops,
.check_atapi_dma= it821x_check_atapi_dma,
.sff_dev_select = it821x_passthru_dev_select,
.bmdma_start = it821x_passthru_bmdma_start,
.bmdma_stop = it821x_passthru_bmdma_stop,
.qc_issue = it821x_passthru_qc_issue,
.cable_detect = it821x_rdc_cable,
.set_piomode = it821x_passthru_set_piomode,
.set_dmamode = it821x_passthru_set_dmamode,
.port_start = it821x_port_start,
};
static void it821x_disable_raid(struct pci_dev *pdev)
{
/* Neither the RDC nor the IT8211 */
if (pdev->vendor != PCI_VENDOR_ID_ITE ||
pdev->device != PCI_DEVICE_ID_ITE_8212)
return;
/* 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 const struct ata_port_info info_smart = {
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = 0x1f,
.mwdma_mask = 0x07,
.udma_mask = ATA_UDMA6,
.port_ops = &it821x_smart_port_ops
};
static const struct ata_port_info info_passthru = {
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = 0x1f,
.mwdma_mask = 0x07,
.udma_mask = ATA_UDMA6,
.port_ops = &it821x_passthru_port_ops
};
static const struct ata_port_info info_rdc = {
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = 0x1f,
.mwdma_mask = 0x07,
/* No UDMA */
.port_ops = &it821x_rdc_port_ops
};
const struct ata_port_info *ppi[] = { NULL, NULL };
static char *mode[2] = { "pass through", "smart" };
int rc;
rc = pcim_enable_device(pdev);
if (rc)
return rc;
if (pdev->vendor == PCI_VENDOR_ID_RDC) {
ppi[0] = &info_rdc;
} else {
/* 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)
ppi[0] = &info_passthru;
else
ppi[0] = &info_smart;
}
return ata_pci_sff_init_one(pdev, ppi, &it821x_sht, NULL);
}
#ifdef CONFIG_PM
static int it821x_reinit_one(struct pci_dev *pdev)
{
struct ata_host *host = dev_get_drvdata(&pdev->dev);
int rc;
rc = ata_pci_device_do_resume(pdev);
if (rc)
return rc;
/* Resume - turn raid back off if need be */
if (it8212_noraid)
it821x_disable_raid(pdev);
ata_host_resume(host);
return rc;
}
#endif
static const struct pci_device_id it821x[] = {
{ PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8211), },
{ PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8212), },
{ PCI_VDEVICE(RDC, 0x1010), },
{ },
};
static struct pci_driver it821x_pci_driver = {
.name = DRV_NAME,
.id_table = it821x,
.probe = it821x_init_one,
.remove = ata_pci_remove_one,
#ifdef CONFIG_PM
.suspend = ata_pci_device_suspend,
.resume = it821x_reinit_one,
#endif
};
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(noraid, "Force card into bypass mode");
module_init(it821x_init);
module_exit(it821x_exit);
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