[deliverable/linux.git] / drivers / ide / ide-atapi.c

/*
 * ATAPI support.
 */

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

#ifdef DEBUG
#define debug_log(fmt, args...) \
	printk(KERN_INFO "ide: " fmt, ## args)
#else
#define debug_log(fmt, args...) do {} while (0)
#endif

/* TODO: unify the code thus making some arguments go away */
ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
	ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry,
	void (*update_buffers)(ide_drive_t *, struct ide_atapi_pc *),
	void (*retry_pc)(ide_drive_t *), void (*dsc_handle)(ide_drive_t *),
	void (*io_buffers)(ide_drive_t *, struct ide_atapi_pc *, unsigned, int))
{
	ide_hwif_t *hwif = drive->hwif;
	struct request *rq = hwif->hwgroup->rq;
	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
	xfer_func_t *xferfunc;
	unsigned int temp;
	u16 bcount;
	u8 stat, ireason, scsi = drive->scsi;

	debug_log("Enter %s - interrupt handler\n", __func__);

	if (pc->flags & PC_FLAG_TIMEDOUT) {
		drive->pc_callback(drive);
		return ide_stopped;
	}

	/* Clear the interrupt */
	stat = tp_ops->read_status(hwif);

	if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
		if (hwif->dma_ops->dma_end(drive) ||
		    (drive->media == ide_tape && !scsi && (stat & ATA_ERR))) {
			if (drive->media == ide_floppy && !scsi)
				printk(KERN_ERR "%s: DMA %s error\n",
					drive->name, rq_data_dir(pc->rq)
						     ? "write" : "read");
			pc->flags |= PC_FLAG_DMA_ERROR;
		} else {
			pc->xferred = pc->req_xfer;
			if (update_buffers)
				update_buffers(drive, pc);
		}
		debug_log("%s: DMA finished\n", drive->name);
	}

	/* No more interrupts */
	if ((stat & ATA_DRQ) == 0) {
		debug_log("Packet command completed, %d bytes transferred\n",
			  pc->xferred);

		pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;

		local_irq_enable_in_hardirq();

		if (drive->media == ide_tape && !scsi &&
		    (stat & ATA_ERR) && rq->cmd[0] == REQUEST_SENSE)
			stat &= ~ATA_ERR;

		if ((stat & ATA_ERR) || (pc->flags & PC_FLAG_DMA_ERROR)) {
			/* Error detected */
			debug_log("%s: I/O error\n", drive->name);

			if (drive->media != ide_tape || scsi) {
				pc->rq->errors++;
				if (scsi)
					goto cmd_finished;
			}

			if (rq->cmd[0] == REQUEST_SENSE) {
				printk(KERN_ERR "%s: I/O error in request sense"
						" command\n", drive->name);
				return ide_do_reset(drive);
			}

			debug_log("[cmd %x]: check condition\n", rq->cmd[0]);

			/* Retry operation */
			retry_pc(drive);

			/* queued, but not started */
			return ide_stopped;
		}
cmd_finished:
		pc->error = 0;
		if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) &&
		    (stat & ATA_DSC) == 0) {
			dsc_handle(drive);
			return ide_stopped;
		}

		/* Command finished - Call the callback function */
		drive->pc_callback(drive);

		return ide_stopped;
	}

	if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
		pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
		printk(KERN_ERR "%s: The device wants to issue more interrupts "
				"in DMA mode\n", drive->name);
		ide_dma_off(drive);
		return ide_do_reset(drive);
	}

	/* Get the number of bytes to transfer on this interrupt. */
	ide_read_bcount_and_ireason(drive, &bcount, &ireason);

	if (ireason & ATAPI_COD) {
		printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__);
		return ide_do_reset(drive);
	}

	if (((ireason & ATAPI_IO) == ATAPI_IO) ==
		!!(pc->flags & PC_FLAG_WRITING)) {
		/* Hopefully, we will never get here */
		printk(KERN_ERR "%s: We wanted to %s, but the device wants us "
				"to %s!\n", drive->name,
				(ireason & ATAPI_IO) ? "Write" : "Read",
				(ireason & ATAPI_IO) ? "Read" : "Write");
		return ide_do_reset(drive);
	}

	if (!(pc->flags & PC_FLAG_WRITING)) {
		/* Reading - Check that we have enough space */
		temp = pc->xferred + bcount;
		if (temp > pc->req_xfer) {
			if (temp > pc->buf_size) {
				printk(KERN_ERR "%s: The device wants to send "
						"us more data than expected - "
						"discarding data\n",
						drive->name);
				if (scsi)
					temp = pc->buf_size - pc->xferred;
				else
					temp = 0;
				if (temp) {
					if (pc->sg)
						io_buffers(drive, pc, temp, 0);
					else
						tp_ops->input_data(drive, NULL,
							pc->cur_pos, temp);
					printk(KERN_ERR "%s: transferred %d of "
							"%d bytes\n",
							drive->name,
							temp, bcount);
				}
				pc->xferred += temp;
				pc->cur_pos += temp;
				ide_pad_transfer(drive, 0, bcount - temp);
				ide_set_handler(drive, handler, timeout,
						expiry);
				return ide_started;
			}
			debug_log("The device wants to send us more data than "
				  "expected - allowing transfer\n");
		}
		xferfunc = tp_ops->input_data;
	} else
		xferfunc = tp_ops->output_data;

	if ((drive->media == ide_floppy && !scsi && !pc->buf) ||
	    (drive->media == ide_tape && !scsi && pc->bh) ||
	    (scsi && pc->sg))
		io_buffers(drive, pc, bcount, !!(pc->flags & PC_FLAG_WRITING));
	else
		xferfunc(drive, NULL, pc->cur_pos, bcount);

	/* Update the current position */
	pc->xferred += bcount;
	pc->cur_pos += bcount;

	debug_log("[cmd %x] transferred %d bytes on that intr.\n",
		  rq->cmd[0], bcount);

	/* And set the interrupt handler again */
	ide_set_handler(drive, handler, timeout, expiry);
	return ide_started;
}
EXPORT_SYMBOL_GPL(ide_pc_intr);

static u8 ide_read_ireason(ide_drive_t *drive)
{
	ide_task_t task;

	memset(&task, 0, sizeof(task));
	task.tf_flags = IDE_TFLAG_IN_NSECT;

	drive->hwif->tp_ops->tf_read(drive, &task);

	return task.tf.nsect & 3;
}

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

	while (retries-- && ((ireason & ATAPI_COD) == 0 ||
		(ireason & ATAPI_IO))) {
		printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing "
				"a packet command, retrying\n", drive->name);
		udelay(100);
		ireason = ide_read_ireason(drive);
		if (retries == 0) {
			printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing "
					"a packet command, ignoring\n",
					drive->name);
			ireason |= ATAPI_COD;
			ireason &= ~ATAPI_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;
	struct request *rq = hwif->hwgroup->rq;
	ide_startstop_t startstop;
	u8 ireason;

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

	ireason = ide_read_ireason(drive);
	if (drive->media == ide_tape && !drive->scsi)
		ireason = ide_wait_ireason(drive, ireason);

	if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_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 ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0)
		hwif->tp_ops->output_data(drive, NULL, rq->cmd, 12);

	return ide_started;
}
EXPORT_SYMBOL_GPL(ide_transfer_pc);

ide_startstop_t ide_issue_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;
	u16 bcount;
	u8 dma = 0;

	/* We haven't transferred any data yet */
	pc->xferred = 0;
	pc->cur_pos = pc->buf;

	/* Request to transfer the entire buffer at once */
	if (drive->media == ide_tape && !drive->scsi)
		bcount = pc->req_xfer;
	else
		bcount = min(pc->req_xfer, 63 * 1024);

	if (pc->flags & PC_FLAG_DMA_ERROR) {
		pc->flags &= ~PC_FLAG_DMA_ERROR;
		ide_dma_off(drive);
	}

	if ((pc->flags & PC_FLAG_DMA_OK) && drive->using_dma) {
		if (drive->scsi)
			hwif->sg_mapped = 1;
		dma = !hwif->dma_ops->dma_setup(drive);
		if (drive->scsi)
			hwif->sg_mapped = 0;
	}

	if (!dma)
		pc->flags &= ~PC_FLAG_DMA_OK;

	ide_pktcmd_tf_load(drive, drive->scsi ? 0 : IDE_TFLAG_OUT_DEVICE,
			   bcount, dma);

	/* Issue the packet command */
	if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
		ide_execute_command(drive, ATA_CMD_PACKET, handler,
				    timeout, NULL);
		return ide_started;
	} else {
		ide_execute_pkt_cmd(drive);
		return (*handler)(drive);
	}
}
EXPORT_SYMBOL_GPL(ide_issue_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>
646c0cb6 BZ	8	#include <scsi/scsi.h>
	9
	10	#ifdef DEBUG
	11	#define debug_log(fmt, args...) \
	12	printk(KERN_INFO "ide: " fmt, ## args)
	13	#else
	14	#define debug_log(fmt, args...) do {} while (0)
	15	#endif
	16
	17	/* TODO: unify the code thus making some arguments go away */
	18	ide_startstop_t ide_pc_intr(ide_drive_t drive, struct ide_atapi_pc pc,
	19	ide_handler_t handler, unsigned int timeout, ide_expiry_t expiry,
	20	void (update_buffers)(ide_drive_t , struct ide_atapi_pc *),
	21	void (retry_pc)(ide_drive_t ), void (dsc_handle)(ide_drive_t ),
	22	void (io_buffers)(ide_drive_t , struct ide_atapi_pc *, unsigned, int))
	23	{
	24	ide_hwif_t *hwif = drive->hwif;
8fccf899	25	struct request *rq = hwif->hwgroup->rq;
374e042c	26	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
646c0cb6 BZ	27	xfer_func_t *xferfunc;
	28	unsigned int temp;
	29	u16 bcount;
	30	u8 stat, ireason, scsi = drive->scsi;
	31
	32	debug_log("Enter %s - interrupt handler\n", __func__);
	33
	34	if (pc->flags & PC_FLAG_TIMEDOUT) {
db9d2869	35	drive->pc_callback(drive);
646c0cb6 BZ	36	return ide_stopped;
	37	}
	38
	39	/* Clear the interrupt */
374e042c	40	stat = tp_ops->read_status(hwif);
646c0cb6 BZ	41
	42	if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
	43	if (hwif->dma_ops->dma_end(drive) \|\|
3a7d2484	44	(drive->media == ide_tape && !scsi && (stat & ATA_ERR))) {
646c0cb6 BZ	45	if (drive->media == ide_floppy && !scsi)
	46	printk(KERN_ERR "%s: DMA %s error\n",
	47	drive->name, rq_data_dir(pc->rq)
	48	? "write" : "read");
	49	pc->flags \|= PC_FLAG_DMA_ERROR;
	50	} else {
	51	pc->xferred = pc->req_xfer;
	52	if (update_buffers)
	53	update_buffers(drive, pc);
	54	}
	55	debug_log("%s: DMA finished\n", drive->name);
	56	}
	57
	58	/* No more interrupts */
3a7d2484	59	if ((stat & ATA_DRQ) == 0) {
646c0cb6 BZ	60	debug_log("Packet command completed, %d bytes transferred\n",
	61	pc->xferred);
	62
	63	pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
	64
	65	local_irq_enable_in_hardirq();
	66
	67	if (drive->media == ide_tape && !scsi &&
3a7d2484 BZ	68	(stat & ATA_ERR) && rq->cmd[0] == REQUEST_SENSE)
3a7d2484 BZ	69	stat &= ~ATA_ERR;
8fccf899	70
3a7d2484	71	if ((stat & ATA_ERR) \|\| (pc->flags & PC_FLAG_DMA_ERROR)) {
646c0cb6 BZ	72	/* Error detected */
	73	debug_log("%s: I/O error\n", drive->name);
	74
	75	if (drive->media != ide_tape \|\| scsi) {
	76	pc->rq->errors++;
	77	if (scsi)
	78	goto cmd_finished;
	79	}
	80
8fccf899	81	if (rq->cmd[0] == REQUEST_SENSE) {
646c0cb6 BZ	82	printk(KERN_ERR "%s: I/O error in request sense"
	83	" command\n", drive->name);
	84	return ide_do_reset(drive);
	85	}
	86
8fccf899	87	debug_log("[cmd %x]: check condition\n", rq->cmd[0]);
646c0cb6 BZ	88
	89	/* Retry operation */
	90	retry_pc(drive);
8fccf899	91
646c0cb6 BZ	92	/* queued, but not started */
	93	return ide_stopped;
	94	}
	95	cmd_finished:
	96	pc->error = 0;
	97	if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) &&
3a7d2484	98	(stat & ATA_DSC) == 0) {
646c0cb6 BZ	99	dsc_handle(drive);
	100	return ide_stopped;
	101	}
8fccf899	102
646c0cb6	103	/* Command finished - Call the callback function */
db9d2869	104	drive->pc_callback(drive);
8fccf899	105
646c0cb6 BZ	106	return ide_stopped;
	107	}
	108
	109	if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
	110	pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
	111	printk(KERN_ERR "%s: The device wants to issue more interrupts "
	112	"in DMA mode\n", drive->name);
	113	ide_dma_off(drive);
	114	return ide_do_reset(drive);
	115	}
646c0cb6	116
1823649b BZ	117	/* Get the number of bytes to transfer on this interrupt. */
1823649b BZ	118	ide_read_bcount_and_ireason(drive, &bcount, &ireason);
646c0cb6	119
3a7d2484	120	if (ireason & ATAPI_COD) {
646c0cb6 BZ	121	printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__);
	122	return ide_do_reset(drive);
	123	}
8fccf899	124
3a7d2484 BZ	125	if (((ireason & ATAPI_IO) == ATAPI_IO) ==
3a7d2484 BZ	126	!!(pc->flags & PC_FLAG_WRITING)) {
646c0cb6 BZ	127	/* Hopefully, we will never get here */
	128	printk(KERN_ERR "%s: We wanted to %s, but the device wants us "
	129	"to %s!\n", drive->name,
3a7d2484 BZ	130	(ireason & ATAPI_IO) ? "Write" : "Read",
3a7d2484 BZ	131	(ireason & ATAPI_IO) ? "Read" : "Write");
646c0cb6 BZ	132	return ide_do_reset(drive);
646c0cb6 BZ	133	}
8fccf899	134
646c0cb6 BZ	135	if (!(pc->flags & PC_FLAG_WRITING)) {
	136	/* Reading - Check that we have enough space */
	137	temp = pc->xferred + bcount;
	138	if (temp > pc->req_xfer) {
	139	if (temp > pc->buf_size) {
	140	printk(KERN_ERR "%s: The device wants to send "
	141	"us more data than expected - "
	142	"discarding data\n",
	143	drive->name);
	144	if (scsi)
	145	temp = pc->buf_size - pc->xferred;
	146	else
	147	temp = 0;
	148	if (temp) {
	149	if (pc->sg)
	150	io_buffers(drive, pc, temp, 0);
	151	else
374e042c	152	tp_ops->input_data(drive, NULL,
646c0cb6 BZ	153	pc->cur_pos, temp);
	154	printk(KERN_ERR "%s: transferred %d of "
	155	"%d bytes\n",
	156	drive->name,
	157	temp, bcount);
	158	}
	159	pc->xferred += temp;
	160	pc->cur_pos += temp;
	161	ide_pad_transfer(drive, 0, bcount - temp);
	162	ide_set_handler(drive, handler, timeout,
	163	expiry);
	164	return ide_started;
	165	}
	166	debug_log("The device wants to send us more data than "
	167	"expected - allowing transfer\n");
	168	}
374e042c	169	xferfunc = tp_ops->input_data;
646c0cb6	170	} else
374e042c	171	xferfunc = tp_ops->output_data;
646c0cb6 BZ	172
	173	if ((drive->media == ide_floppy && !scsi && !pc->buf) \|\|
	174	(drive->media == ide_tape && !scsi && pc->bh) \|\|
	175	(scsi && pc->sg))
	176	io_buffers(drive, pc, bcount, !!(pc->flags & PC_FLAG_WRITING));
	177	else
	178	xferfunc(drive, NULL, pc->cur_pos, bcount);
	179
	180	/* Update the current position */
	181	pc->xferred += bcount;
	182	pc->cur_pos += bcount;
	183
	184	debug_log("[cmd %x] transferred %d bytes on that intr.\n",
8fccf899	185	rq->cmd[0], bcount);
646c0cb6 BZ	186
	187	/* And set the interrupt handler again */
	188	ide_set_handler(drive, handler, timeout, expiry);
	189	return ide_started;
	190	}
	191	EXPORT_SYMBOL_GPL(ide_pc_intr);
594c16d8	192
88a72109 BZ	193	static u8 ide_read_ireason(ide_drive_t *drive)
	194	{
	195	ide_task_t task;
	196
	197	memset(&task, 0, sizeof(task));
	198	task.tf_flags = IDE_TFLAG_IN_NSECT;
	199
374e042c	200	drive->hwif->tp_ops->tf_read(drive, &task);
88a72109 BZ	201
	202	return task.tf.nsect & 3;
	203	}
	204
594c16d8 BZ	205	static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason)
594c16d8 BZ	206	{
594c16d8 BZ	207	int retries = 100;
594c16d8 BZ	208
3a7d2484 BZ	209	while (retries-- && ((ireason & ATAPI_COD) == 0 \|\|
3a7d2484 BZ	210	(ireason & ATAPI_IO))) {
594c16d8 BZ	211	printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing "
	212	"a packet command, retrying\n", drive->name);
	213	udelay(100);
88a72109	214	ireason = ide_read_ireason(drive);
594c16d8 BZ	215	if (retries == 0) {
	216	printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing "
	217	"a packet command, ignoring\n",
	218	drive->name);
3a7d2484 BZ	219	ireason \|= ATAPI_COD;
3a7d2484 BZ	220	ireason &= ~ATAPI_IO;
594c16d8 BZ	221	}
	222	}
	223
	224	return ireason;
	225	}
	226
	227	ide_startstop_t ide_transfer_pc(ide_drive_t drive, struct ide_atapi_pc pc,
	228	ide_handler_t *handler, unsigned int timeout,
	229	ide_expiry_t *expiry)
	230	{
	231	ide_hwif_t *hwif = drive->hwif;
8fccf899	232	struct request *rq = hwif->hwgroup->rq;
594c16d8 BZ	233	ide_startstop_t startstop;
	234	u8 ireason;
	235
3a7d2484	236	if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) {
594c16d8 BZ	237	printk(KERN_ERR "%s: Strange, packet command initiated yet "
	238	"DRQ isn't asserted\n", drive->name);
	239	return startstop;
	240	}
	241
88a72109	242	ireason = ide_read_ireason(drive);
594c16d8 BZ	243	if (drive->media == ide_tape && !drive->scsi)
	244	ireason = ide_wait_ireason(drive, ireason);
	245
3a7d2484	246	if ((ireason & ATAPI_COD) == 0 \|\| (ireason & ATAPI_IO)) {
594c16d8 BZ	247	printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing "
	248	"a packet command\n", drive->name);
	249	return ide_do_reset(drive);
	250	}
	251
	252	/* Set the interrupt routine */
	253	ide_set_handler(drive, handler, timeout, expiry);
	254
	255	/* Begin DMA, if necessary */
	256	if (pc->flags & PC_FLAG_DMA_OK) {
	257	pc->flags \|= PC_FLAG_DMA_IN_PROGRESS;
	258	hwif->dma_ops->dma_start(drive);
	259	}
	260
	261	/* Send the actual packet */
ea68d270	262	if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0)
8fccf899	263	hwif->tp_ops->output_data(drive, NULL, rq->cmd, 12);
594c16d8 BZ	264
	265	return ide_started;
	266	}
	267	EXPORT_SYMBOL_GPL(ide_transfer_pc);
6bf1641c BZ	268
	269	ide_startstop_t ide_issue_pc(ide_drive_t drive, struct ide_atapi_pc pc,
	270	ide_handler_t *handler, unsigned int timeout,
	271	ide_expiry_t *expiry)
	272	{
	273	ide_hwif_t *hwif = drive->hwif;
	274	u16 bcount;
	275	u8 dma = 0;
	276
	277	/* We haven't transferred any data yet */
	278	pc->xferred = 0;
	279	pc->cur_pos = pc->buf;
	280
	281	/* Request to transfer the entire buffer at once */
	282	if (drive->media == ide_tape && !drive->scsi)
	283	bcount = pc->req_xfer;
	284	else
	285	bcount = min(pc->req_xfer, 63 * 1024);
	286
	287	if (pc->flags & PC_FLAG_DMA_ERROR) {
	288	pc->flags &= ~PC_FLAG_DMA_ERROR;
	289	ide_dma_off(drive);
	290	}
	291
	292	if ((pc->flags & PC_FLAG_DMA_OK) && drive->using_dma) {
	293	if (drive->scsi)
	294	hwif->sg_mapped = 1;
	295	dma = !hwif->dma_ops->dma_setup(drive);
	296	if (drive->scsi)
	297	hwif->sg_mapped = 0;
	298	}
	299
	300	if (!dma)
	301	pc->flags &= ~PC_FLAG_DMA_OK;
	302
	303	ide_pktcmd_tf_load(drive, drive->scsi ? 0 : IDE_TFLAG_OUT_DEVICE,
	304	bcount, dma);
	305
	306	/* Issue the packet command */
ac77ef8b	307	if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
aaaade3f	308	ide_execute_command(drive, ATA_CMD_PACKET, handler,
6bf1641c BZ	309	timeout, NULL);
	310	return ide_started;
	311	} else {
	312	ide_execute_pkt_cmd(drive);
	313	return (*handler)(drive);
	314	}
	315	}
	316	EXPORT_SYMBOL_GPL(ide_issue_pc);