コード例 #1
0
ファイル: ide.c プロジェクト: percy-g2/rowboat-kernel
void ide_port_apply_params(ide_hwif_t *hwif)
{
    ide_drive_t *drive;
    int i;

    if (ide_ignore_cable & (1 << hwif->index)) {
        printk(KERN_INFO "ide: ignoring cable detection for %s\n",
               hwif->name);
        hwif->cbl = ATA_CBL_PATA40_SHORT;
    }

    ide_port_for_each_dev(i, drive, hwif)
    ide_dev_apply_params(drive, i);
}
コード例 #2
0
ファイル: ide-eh.c プロジェクト: AshishNamdev/linux
/*
 * do_reset1() attempts to recover a confused drive by resetting it.
 * Unfortunately, resetting a disk drive actually resets all devices on
 * the same interface, so it can really be thought of as resetting the
 * interface rather than resetting the drive.
 *
 * ATAPI devices have their own reset mechanism which allows them to be
 * individually reset without clobbering other devices on the same interface.
 *
 * Unfortunately, the IDE interface does not generate an interrupt to let
 * us know when the reset operation has finished, so we must poll for this.
 * Equally poor, though, is the fact that this may a very long time to complete,
 * (up to 30 seconds worstcase).  So, instead of busy-waiting here for it,
 * we set a timer to poll at 50ms intervals.
 */
static ide_startstop_t do_reset1(ide_drive_t *drive, int do_not_try_atapi)
{
	ide_hwif_t *hwif = drive->hwif;
	struct ide_io_ports *io_ports = &hwif->io_ports;
	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
	const struct ide_port_ops *port_ops;
	ide_drive_t *tdrive;
	unsigned long flags, timeout;
	int i;
	DEFINE_WAIT(wait);

	spin_lock_irqsave(&hwif->lock, flags);

	/* We must not reset with running handlers */
	BUG_ON(hwif->handler != NULL);

	/* For an ATAPI device, first try an ATAPI SRST. */
	if (drive->media != ide_disk && !do_not_try_atapi) {
		pre_reset(drive);
		tp_ops->dev_select(drive);
		udelay(20);
		tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
		ndelay(400);
		hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
		hwif->polling = 1;
		__ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20);
		spin_unlock_irqrestore(&hwif->lock, flags);
		return ide_started;
	}

	/* We must not disturb devices in the IDE_DFLAG_PARKED state. */
	do {
		unsigned long now;

		prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE);
		timeout = jiffies;
		ide_port_for_each_present_dev(i, tdrive, hwif) {
			if ((tdrive->dev_flags & IDE_DFLAG_PARKED) &&
			    time_after(tdrive->sleep, timeout))
				timeout = tdrive->sleep;
		}

		now = jiffies;
		if (time_before_eq(timeout, now))
			break;

		spin_unlock_irqrestore(&hwif->lock, flags);
		timeout = schedule_timeout_uninterruptible(timeout - now);
		spin_lock_irqsave(&hwif->lock, flags);
	} while (timeout);
	finish_wait(&ide_park_wq, &wait);

	/*
	 * First, reset any device state data we were maintaining
	 * for any of the drives on this interface.
	 */
	ide_port_for_each_dev(i, tdrive, hwif)
		pre_reset(tdrive);

	if (io_ports->ctl_addr == 0) {
		spin_unlock_irqrestore(&hwif->lock, flags);
		ide_complete_drive_reset(drive, -ENXIO);
		return ide_stopped;
	}

	/*
	 * Note that we also set nIEN while resetting the device,
	 * to mask unwanted interrupts from the interface during the reset.
	 * However, due to the design of PC hardware, this will cause an
	 * immediate interrupt due to the edge transition it produces.
	 * This single interrupt gives us a "fast poll" for drives that
	 * recover from reset very quickly, saving us the first 50ms wait time.
	 */
	/* set SRST and nIEN */
	tp_ops->write_devctl(hwif, ATA_SRST | ATA_NIEN | ATA_DEVCTL_OBS);
	/* more than enough time */
	udelay(10);
	/* clear SRST, leave nIEN (unless device is on the quirk list) */
	tp_ops->write_devctl(hwif,
		((drive->dev_flags & IDE_DFLAG_NIEN_QUIRK) ? 0 : ATA_NIEN) |
		 ATA_DEVCTL_OBS);
	/* more than enough time */
	udelay(10);
	hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
	hwif->polling = 1;
	__ide_set_handler(drive, &reset_pollfunc, HZ/20);

	/*
	 * Some weird controller like resetting themselves to a strange
	 * state when the disks are reset this way. At least, the Winbond
	 * 553 documentation says that
	 */
	port_ops = hwif->port_ops;
	if (port_ops && port_ops->resetproc)
		port_ops->resetproc(drive);

	spin_unlock_irqrestore(&hwif->lock, flags);
	return ide_started;
}
コード例 #3
0
ファイル: scc_pata.c プロジェクト: mecke/linux-2.6
static int scc_dma_end(ide_drive_t *drive)
{
	ide_hwif_t *hwif = drive->hwif;
	void __iomem *dma_base = (void __iomem *)hwif->dma_base;
	unsigned long intsts_port = hwif->dma_base + 0x014;
	u32 reg;
	int dma_stat, data_loss = 0;
	static int retry = 0;

	/* errata A308 workaround: Step5 (check data loss) */
	/* We don't check non ide_disk because it is limited to UDMA4 */
	if (!(in_be32((void __iomem *)hwif->io_ports.ctl_addr)
	      & ATA_ERR) &&
	    drive->media == ide_disk && drive->current_speed > XFER_UDMA_4) {
		reg = in_be32((void __iomem *)intsts_port);
		if (!(reg & INTSTS_ACTEINT)) {
			printk(KERN_WARNING "%s: operation failed (transfer data loss)\n",
			       drive->name);
			data_loss = 1;
			if (retry++) {
				struct request *rq = hwif->rq;
				ide_drive_t *drive;
				int i;

				/* ERROR_RESET and drive->crc_count are needed
				 * to reduce DMA transfer mode in retry process.
				 */
				if (rq)
					rq->errors |= ERROR_RESET;

				ide_port_for_each_dev(i, drive, hwif)
					drive->crc_count++;
			}
		}
	}

	while (1) {
		reg = in_be32((void __iomem *)intsts_port);

		if (reg & INTSTS_SERROR) {
			printk(KERN_WARNING "%s: SERROR\n", SCC_PATA_NAME);
			out_be32((void __iomem *)intsts_port, INTSTS_SERROR|INTSTS_BMSINT);

			out_be32(dma_base, in_be32(dma_base) & ~QCHCD_IOS_SS);
			continue;
		}

		if (reg & INTSTS_PRERR) {
			u32 maea0, maec0;
			unsigned long ctl_base = hwif->config_data;

			maea0 = in_be32((void __iomem *)(ctl_base + 0xF50));
			maec0 = in_be32((void __iomem *)(ctl_base + 0xF54));

			printk(KERN_WARNING "%s: PRERR [addr:%x cmd:%x]\n", SCC_PATA_NAME, maea0, maec0);

			out_be32((void __iomem *)intsts_port, INTSTS_PRERR|INTSTS_BMSINT);

			out_be32(dma_base, in_be32(dma_base) & ~QCHCD_IOS_SS);
			continue;
		}

		if (reg & INTSTS_RERR) {
			printk(KERN_WARNING "%s: Response Error\n", SCC_PATA_NAME);
			out_be32((void __iomem *)intsts_port, INTSTS_RERR|INTSTS_BMSINT);

			out_be32(dma_base, in_be32(dma_base) & ~QCHCD_IOS_SS);
			continue;
		}

		if (reg & INTSTS_ICERR) {
			out_be32(dma_base, in_be32(dma_base) & ~QCHCD_IOS_SS);

			printk(KERN_WARNING "%s: Illegal Configuration\n", SCC_PATA_NAME);
			out_be32((void __iomem *)intsts_port, INTSTS_ICERR|INTSTS_BMSINT);
			continue;
		}

		if (reg & INTSTS_BMSINT) {
			printk(KERN_WARNING "%s: Internal Bus Error\n", SCC_PATA_NAME);
			out_be32((void __iomem *)intsts_port, INTSTS_BMSINT);

			ide_do_reset(drive);
			continue;
		}

		if (reg & INTSTS_BMHE) {
			out_be32((void __iomem *)intsts_port, INTSTS_BMHE);
			continue;
		}

		if (reg & INTSTS_ACTEINT) {
			out_be32((void __iomem *)intsts_port, INTSTS_ACTEINT);
			continue;
		}

		if (reg & INTSTS_IOIRQS) {
			out_be32((void __iomem *)intsts_port, INTSTS_IOIRQS);
			continue;
		}
		break;
	}

	dma_stat = __scc_dma_end(drive);
	if (data_loss)
		dma_stat |= 2; /* emulate DMA error (to retry command) */
	return dma_stat;
}