/* * 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);