[linux-2.6-block.git] / drivers / ide / ide-atapi.c

/*
 * ATAPI support.
 */

#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/ide.h>

static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason)
{
	ide_hwif_t *hwif = drive->hwif;
	int retries = 100;

	while (retries-- && ((ireason & CD) == 0 || (ireason & IO))) {
		printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing "
				"a packet command, retrying\n", drive->name);
		udelay(100);
		ireason = hwif->INB(hwif->io_ports.nsect_addr);
		if (retries == 0) {
			printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing "
					"a packet command, ignoring\n",
					drive->name);
			ireason |= CD;
			ireason &= ~IO;
		}
	}

	return ireason;
}

ide_startstop_t ide_transfer_pc(ide_drive_t *drive, struct ide_atapi_pc *pc,
				ide_handler_t *handler, unsigned int timeout,
				ide_expiry_t *expiry)
{
	ide_hwif_t *hwif = drive->hwif;
	ide_startstop_t startstop;
	u8 ireason;

	if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
		printk(KERN_ERR "%s: Strange, packet command initiated yet "
				"DRQ isn't asserted\n", drive->name);
		return startstop;
	}

	ireason = hwif->INB(hwif->io_ports.nsect_addr);
	if (drive->media == ide_tape && !drive->scsi)
		ireason = ide_wait_ireason(drive, ireason);

	if ((ireason & CD) == 0 || (ireason & IO)) {
		printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing "
				"a packet command\n", drive->name);
		return ide_do_reset(drive);
	}

	/* Set the interrupt routine */
	ide_set_handler(drive, handler, timeout, expiry);

	/* Begin DMA, if necessary */
	if (pc->flags & PC_FLAG_DMA_OK) {
		pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
		hwif->dma_ops->dma_start(drive);
	}

	/* Send the actual packet */
	if ((pc->flags & PC_FLAG_ZIP_DRIVE) == 0)
		hwif->output_data(drive, NULL, pc->c, 12);

	return ide_started;
}
EXPORT_SYMBOL_GPL(ide_transfer_pc);
Commit	Line	Data
594c16d8 BZ	1	/*
	2	* ATAPI support.
	3	*/
	4
	5	#include <linux/kernel.h>
	6	#include <linux/delay.h>
	7	#include <linux/ide.h>
	8
	9	static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason)
	10	{
	11	ide_hwif_t *hwif = drive->hwif;
	12	int retries = 100;
	13
	14	while (retries-- && ((ireason & CD) == 0 \|\| (ireason & IO))) {
	15	printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing "
	16	"a packet command, retrying\n", drive->name);
	17	udelay(100);
	18	ireason = hwif->INB(hwif->io_ports.nsect_addr);
	19	if (retries == 0) {
	20	printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing "
	21	"a packet command, ignoring\n",
	22	drive->name);
	23	ireason \|= CD;
	24	ireason &= ~IO;
	25	}
	26	}
	27
	28	return ireason;
	29	}
	30
	31	ide_startstop_t ide_transfer_pc(ide_drive_t drive, struct ide_atapi_pc pc,
	32	ide_handler_t *handler, unsigned int timeout,
	33	ide_expiry_t *expiry)
	34	{
	35	ide_hwif_t *hwif = drive->hwif;
	36	ide_startstop_t startstop;
	37	u8 ireason;
	38
	39	if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
	40	printk(KERN_ERR "%s: Strange, packet command initiated yet "
	41	"DRQ isn't asserted\n", drive->name);
	42	return startstop;
	43	}
	44
	45	ireason = hwif->INB(hwif->io_ports.nsect_addr);
	46	if (drive->media == ide_tape && !drive->scsi)
	47	ireason = ide_wait_ireason(drive, ireason);
	48
	49	if ((ireason & CD) == 0 \|\| (ireason & IO)) {
	50	printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing "
	51	"a packet command\n", drive->name);
	52	return ide_do_reset(drive);
	53	}
	54
	55	/* Set the interrupt routine */
	56	ide_set_handler(drive, handler, timeout, expiry);
	57
	58	/* Begin DMA, if necessary */
	59	if (pc->flags & PC_FLAG_DMA_OK) {
	60	pc->flags \|= PC_FLAG_DMA_IN_PROGRESS;
	61	hwif->dma_ops->dma_start(drive);
	62	}
	63
	64	/* Send the actual packet */
65	if ((pc->flags & PC_FLAG_ZIP_DRIVE) == 0)
66	hwif->output_data(drive, NULL, pc->c, 12);
67
68	return ide_started;
69	}
70	EXPORT_SYMBOL_GPL(ide_transfer_pc);