[net-next-2.6.git] / drivers / scsi / sr_ioctl.c

#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/blkdev.h>
#include <linux/blkpg.h>
#include <linux/cdrom.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <asm/uaccess.h>

#include <scsi/scsi.h>
#include <scsi/scsi_dbg.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_ioctl.h>
#include <scsi/scsi_cmnd.h>

#include "sr.h"

#if 0
#define DEBUG
#endif

/* The sr_is_xa() seems to trigger firmware bugs with some drives :-(
 * It is off by default and can be turned on with this module parameter */
static int xa_test = 0;

module_param(xa_test, int, S_IRUGO | S_IWUSR);

/* primitive to determine whether we need to have GFP_DMA set based on
 * the status of the unchecked_isa_dma flag in the host structure */
#define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0)


static int sr_read_tochdr(struct cdrom_device_info *cdi,
		struct cdrom_tochdr *tochdr)
{
	struct scsi_cd *cd = cdi->handle;
	struct packet_command cgc;
	int result;
	unsigned char *buffer;

	buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
	if (!buffer)
		return -ENOMEM;

	memset(&cgc, 0, sizeof(struct packet_command));
	cgc.timeout = IOCTL_TIMEOUT;
	cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
	cgc.cmd[8] = 12;		/* LSB of length */
	cgc.buffer = buffer;
	cgc.buflen = 12;
	cgc.quiet = 1;
	cgc.data_direction = DMA_FROM_DEVICE;

	result = sr_do_ioctl(cd, &cgc);

	tochdr->cdth_trk0 = buffer[2];
	tochdr->cdth_trk1 = buffer[3];

	kfree(buffer);
	return result;
}

static int sr_read_tocentry(struct cdrom_device_info *cdi,
		struct cdrom_tocentry *tocentry)
{
	struct scsi_cd *cd = cdi->handle;
	struct packet_command cgc;
	int result;
	unsigned char *buffer;

	buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
	if (!buffer)
		return -ENOMEM;

	memset(&cgc, 0, sizeof(struct packet_command));
	cgc.timeout = IOCTL_TIMEOUT;
	cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
	cgc.cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0;
	cgc.cmd[6] = tocentry->cdte_track;
	cgc.cmd[8] = 12;		/* LSB of length */
	cgc.buffer = buffer;
	cgc.buflen = 12;
	cgc.data_direction = DMA_FROM_DEVICE;

	result = sr_do_ioctl(cd, &cgc);

	tocentry->cdte_ctrl = buffer[5] & 0xf;
	tocentry->cdte_adr = buffer[5] >> 4;
	tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
	if (tocentry->cdte_format == CDROM_MSF) {
		tocentry->cdte_addr.msf.minute = buffer[9];
		tocentry->cdte_addr.msf.second = buffer[10];
		tocentry->cdte_addr.msf.frame = buffer[11];
	} else
		tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
			+ buffer[10]) << 8) + buffer[11];

	kfree(buffer);
	return result;
}

#define IOCTL_RETRIES 3

/* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command.  When these drives
   are emulating a SCSI device via the idescsi module, they need to have
   CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */

static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti)
{
	struct cdrom_tocentry trk0_te, trk1_te;
	struct cdrom_tochdr tochdr;
	struct packet_command cgc;
	int ntracks, ret;

	ret = sr_read_tochdr(cdi, &tochdr);
	if (ret)
		return ret;

	ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
	
	if (ti->cdti_trk1 == ntracks) 
		ti->cdti_trk1 = CDROM_LEADOUT;
	else if (ti->cdti_trk1 != CDROM_LEADOUT)
		ti->cdti_trk1 ++;

	trk0_te.cdte_track = ti->cdti_trk0;
	trk0_te.cdte_format = CDROM_MSF;
	trk1_te.cdte_track = ti->cdti_trk1;
	trk1_te.cdte_format = CDROM_MSF;
	
	ret = sr_read_tocentry(cdi, &trk0_te);
	if (ret)
		return ret;
	ret = sr_read_tocentry(cdi, &trk1_te);
	if (ret)
		return ret;

	memset(&cgc, 0, sizeof(struct packet_command));
	cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
	cgc.cmd[3] = trk0_te.cdte_addr.msf.minute;
	cgc.cmd[4] = trk0_te.cdte_addr.msf.second;
	cgc.cmd[5] = trk0_te.cdte_addr.msf.frame;
	cgc.cmd[6] = trk1_te.cdte_addr.msf.minute;
	cgc.cmd[7] = trk1_te.cdte_addr.msf.second;
	cgc.cmd[8] = trk1_te.cdte_addr.msf.frame;
	cgc.data_direction = DMA_NONE;
	cgc.timeout = IOCTL_TIMEOUT;
	return sr_do_ioctl(cdi->handle, &cgc);
}

static int sr_play_trkind(struct cdrom_device_info *cdi,
		struct cdrom_ti *ti)

{
	struct scsi_cd *cd = cdi->handle;
	struct packet_command cgc;
	int result;

	memset(&cgc, 0, sizeof(struct packet_command));
	cgc.timeout = IOCTL_TIMEOUT;
	cgc.cmd[0] = GPCMD_PLAYAUDIO_TI;
	cgc.cmd[4] = ti->cdti_trk0;
	cgc.cmd[5] = ti->cdti_ind0;
	cgc.cmd[7] = ti->cdti_trk1;
	cgc.cmd[8] = ti->cdti_ind1;
	cgc.data_direction = DMA_NONE;

	result = sr_do_ioctl(cd, &cgc);
	if (result == -EDRIVE_CANT_DO_THIS)
		result = sr_fake_playtrkind(cdi, ti);

	return result;
}

/* We do our own retries because we want to know what the specific
   error code is.  Normally the UNIT_ATTENTION code will automatically
   clear after one error */

int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc)
{
	struct scsi_device *SDev;
	struct scsi_sense_hdr sshdr;
	int result, err = 0, retries = 0;
	struct request_sense *sense = cgc->sense;

	SDev = cd->device;

	if (!sense) {
		sense = kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL);
		if (!sense) {
			err = -ENOMEM;
			goto out;
		}
	}

      retry:
	if (!scsi_block_when_processing_errors(SDev)) {
		err = -ENODEV;
		goto out;
	}

	memset(sense, 0, sizeof(*sense));
	result = scsi_execute(SDev, cgc->cmd, cgc->data_direction,
			      cgc->buffer, cgc->buflen, (char *)sense,
			      cgc->timeout, IOCTL_RETRIES, 0, NULL);

	scsi_normalize_sense((char *)sense, sizeof(*sense), &sshdr);

	/* Minimal error checking.  Ignore cases we know about, and report the rest. */
	if (driver_byte(result) != 0) {
		switch (sshdr.sense_key) {
		case UNIT_ATTENTION:
			SDev->changed = 1;
			if (!cgc->quiet)
				printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name);
			if (retries++ < 10)
				goto retry;
			err = -ENOMEDIUM;
			break;
		case NOT_READY:	/* This happens if there is no disc in drive */
			if (sshdr.asc == 0x04 &&
			    sshdr.ascq == 0x01) {
				/* sense: Logical unit is in process of becoming ready */
				if (!cgc->quiet)
					printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name);
				if (retries++ < 10) {
					/* sleep 2 sec and try again */
					ssleep(2);
					goto retry;
				} else {
					/* 20 secs are enough? */
					err = -ENOMEDIUM;
					break;
				}
			}
			if (!cgc->quiet)
				printk(KERN_INFO "%s: CDROM not ready.  Make sure there is a disc in the drive.\n", cd->cdi.name);
#ifdef DEBUG
			scsi_print_sense_hdr("sr", &sshdr);
#endif
			err = -ENOMEDIUM;
			break;
		case ILLEGAL_REQUEST:
			err = -EIO;
			if (sshdr.asc == 0x20 &&
			    sshdr.ascq == 0x00)
				/* sense: Invalid command operation code */
				err = -EDRIVE_CANT_DO_THIS;
#ifdef DEBUG
			__scsi_print_command(cgc->cmd);
			scsi_print_sense_hdr("sr", &sshdr);
#endif
			break;
		default:
			printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name);
			__scsi_print_command(cgc->cmd);
			scsi_print_sense_hdr("sr", &sshdr);
			err = -EIO;
		}
	}

	/* Wake up a process waiting for device */
      out:
	if (!cgc->sense)
		kfree(sense);
	cgc->stat = err;
	return err;
}

/* ---------------------------------------------------------------------- */
/* interface to cdrom.c                                                   */

int sr_tray_move(struct cdrom_device_info *cdi, int pos)
{
	Scsi_CD *cd = cdi->handle;
	struct packet_command cgc;

	memset(&cgc, 0, sizeof(struct packet_command));
	cgc.cmd[0] = GPCMD_START_STOP_UNIT;
	cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ;
	cgc.data_direction = DMA_NONE;
	cgc.timeout = IOCTL_TIMEOUT;
	return sr_do_ioctl(cd, &cgc);
}

int sr_lock_door(struct cdrom_device_info *cdi, int lock)
{
	Scsi_CD *cd = cdi->handle;

	return scsi_set_medium_removal(cd->device, lock ?
		       SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW);
}

int sr_drive_status(struct cdrom_device_info *cdi, int slot)
{
	struct scsi_cd *cd = cdi->handle;
	struct scsi_sense_hdr sshdr;
	struct media_event_desc med;

	if (CDSL_CURRENT != slot) {
		/* we have no changer support */
		return -EINVAL;
	}
	if (0 == sr_test_unit_ready(cd->device, &sshdr))
		return CDS_DISC_OK;

	/* SK/ASC/ASCQ of 2/4/1 means "unit is becoming ready" */
	if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY
			&& sshdr.asc == 0x04 && sshdr.ascq == 0x01)
		return CDS_DRIVE_NOT_READY;

	if (!cdrom_get_media_event(cdi, &med)) {
		if (med.media_present)
			return CDS_DISC_OK;
		else if (med.door_open)
			return CDS_TRAY_OPEN;
		else
			return CDS_NO_DISC;
	}

	/*
	 * SK/ASC/ASCQ of 2/4/2 means "initialization required"
	 * Using CD_TRAY_OPEN results in an START_STOP_UNIT to close
	 * the tray, which resolves the initialization requirement.
	 */
	if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY
			&& sshdr.asc == 0x04 && sshdr.ascq == 0x02)
		return CDS_TRAY_OPEN;

	/*
	 * 0x04 is format in progress .. but there must be a disc present!
	 */
	if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04)
		return CDS_DISC_OK;

	/*
	 * If not using Mt Fuji extended media tray reports,
	 * just return TRAY_OPEN since ATAPI doesn't provide
	 * any other way to detect this...
	 */
	if (scsi_sense_valid(&sshdr) &&
	    /* 0x3a is medium not present */
	    sshdr.asc == 0x3a)
		return CDS_NO_DISC;
	else
		return CDS_TRAY_OPEN;

	return CDS_DRIVE_NOT_READY;
}

int sr_disk_status(struct cdrom_device_info *cdi)
{
	Scsi_CD *cd = cdi->handle;
	struct cdrom_tochdr toc_h;
	struct cdrom_tocentry toc_e;
	int i, rc, have_datatracks = 0;

	/* look for data tracks */
	rc = sr_read_tochdr(cdi, &toc_h);
	if (rc)
		return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;

	for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
		toc_e.cdte_track = i;
		toc_e.cdte_format = CDROM_LBA;
		if (sr_read_tocentry(cdi, &toc_e))
			return CDS_NO_INFO;
		if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
			have_datatracks = 1;
			break;
		}
	}
	if (!have_datatracks)
		return CDS_AUDIO;

	if (cd->xa_flag)
		return CDS_XA_2_1;
	else
		return CDS_DATA_1;
}

int sr_get_last_session(struct cdrom_device_info *cdi,
			struct cdrom_multisession *ms_info)
{
	Scsi_CD *cd = cdi->handle;

	ms_info->addr.lba = cd->ms_offset;
	ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0;

	return 0;
}

int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
{
	Scsi_CD *cd = cdi->handle;
	struct packet_command cgc;
	char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
	int result;

	if (!buffer)
		return -ENOMEM;

	memset(&cgc, 0, sizeof(struct packet_command));
	cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
	cgc.cmd[2] = 0x40;	/* I do want the subchannel info */
	cgc.cmd[3] = 0x02;	/* Give me medium catalog number info */
	cgc.cmd[8] = 24;
	cgc.buffer = buffer;
	cgc.buflen = 24;
	cgc.data_direction = DMA_FROM_DEVICE;
	cgc.timeout = IOCTL_TIMEOUT;
	result = sr_do_ioctl(cd, &cgc);

	memcpy(mcn->medium_catalog_number, buffer + 9, 13);
	mcn->medium_catalog_number[13] = 0;

	kfree(buffer);
	return result;
}

int sr_reset(struct cdrom_device_info *cdi)
{
	return 0;
}

int sr_select_speed(struct cdrom_device_info *cdi, int speed)
{
	Scsi_CD *cd = cdi->handle;
	struct packet_command cgc;

	if (speed == 0)
		speed = 0xffff;	/* set to max */
	else
		speed *= 177;	/* Nx to kbyte/s */

	memset(&cgc, 0, sizeof(struct packet_command));
	cgc.cmd[0] = GPCMD_SET_SPEED;	/* SET CD SPEED */
	cgc.cmd[2] = (speed >> 8) & 0xff;	/* MSB for speed (in kbytes/sec) */
	cgc.cmd[3] = speed & 0xff;	/* LSB */
	cgc.data_direction = DMA_NONE;
	cgc.timeout = IOCTL_TIMEOUT;

	if (sr_do_ioctl(cd, &cgc))
		return -EIO;
	return 0;
}

/* ----------------------------------------------------------------------- */
/* this is called by the generic cdrom driver. arg is a _kernel_ pointer,  */
/* because the generic cdrom driver does the user access stuff for us.     */
/* only cdromreadtochdr and cdromreadtocentry are left - for use with the  */
/* sr_disk_status interface for the generic cdrom driver.                  */

int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
{
	switch (cmd) {
	case CDROMREADTOCHDR:
		return sr_read_tochdr(cdi, arg);
	case CDROMREADTOCENTRY:
		return sr_read_tocentry(cdi, arg);
	case CDROMPLAYTRKIND:
		return sr_play_trkind(cdi, arg);
	default:
		return -EINVAL;
	}
}

/* -----------------------------------------------------------------------
 * a function to read all sorts of funny cdrom sectors using the READ_CD
 * scsi-3 mmc command
 *
 * lba:     linear block address
 * format:  0 = data (anything)
 *          1 = audio
 *          2 = data (mode 1)
 *          3 = data (mode 2)
 *          4 = data (mode 2 form1)
 *          5 = data (mode 2 form2)
 * blksize: 2048 | 2336 | 2340 | 2352
 */

static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize)
{
	struct packet_command cgc;

#ifdef DEBUG
	printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n",
	       cd->cdi.name, lba, format, blksize);
#endif

	memset(&cgc, 0, sizeof(struct packet_command));
	cgc.cmd[0] = GPCMD_READ_CD;	/* READ_CD */
	cgc.cmd[1] = ((format & 7) << 2);
	cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
	cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
	cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
	cgc.cmd[5] = (unsigned char) lba & 0xff;
	cgc.cmd[8] = 1;
	switch (blksize) {
	case 2336:
		cgc.cmd[9] = 0x58;
		break;
	case 2340:
		cgc.cmd[9] = 0x78;
		break;
	case 2352:
		cgc.cmd[9] = 0xf8;
		break;
	default:
		cgc.cmd[9] = 0x10;
		break;
	}
	cgc.buffer = dest;
	cgc.buflen = blksize;
	cgc.data_direction = DMA_FROM_DEVICE;
	cgc.timeout = IOCTL_TIMEOUT;
	return sr_do_ioctl(cd, &cgc);
}

/*
 * read sectors with blocksizes other than 2048
 */

static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest)
{
	struct packet_command cgc;
	int rc;

	/* we try the READ CD command first... */
	if (cd->readcd_known) {
		rc = sr_read_cd(cd, dest, lba, 0, blksize);
		if (-EDRIVE_CANT_DO_THIS != rc)
			return rc;
		cd->readcd_known = 0;
		printk("CDROM does'nt support READ CD (0xbe) command\n");
		/* fall & retry the other way */
	}
	/* ... if this fails, we switch the blocksize using MODE SELECT */
	if (blksize != cd->device->sector_size) {
		if (0 != (rc = sr_set_blocklength(cd, blksize)))
			return rc;
	}
#ifdef DEBUG
	printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize);
#endif

	memset(&cgc, 0, sizeof(struct packet_command));
	cgc.cmd[0] = GPCMD_READ_10;
	cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
	cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
	cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
	cgc.cmd[5] = (unsigned char) lba & 0xff;
	cgc.cmd[8] = 1;
	cgc.buffer = dest;
	cgc.buflen = blksize;
	cgc.data_direction = DMA_FROM_DEVICE;
	cgc.timeout = IOCTL_TIMEOUT;
	rc = sr_do_ioctl(cd, &cgc);

	return rc;
}

/*
 * read a sector in raw mode to check the sector format
 * ret: 1 == mode2 (XA), 0 == mode1, <0 == error 
 */

int sr_is_xa(Scsi_CD *cd)
{
	unsigned char *raw_sector;
	int is_xa;

	if (!xa_test)
		return 0;

	raw_sector = kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd));
	if (!raw_sector)
		return -ENOMEM;
	if (0 == sr_read_sector(cd, cd->ms_offset + 16,
				CD_FRAMESIZE_RAW1, raw_sector)) {
		is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
	} else {
		/* read a raw sector failed for some reason. */
		is_xa = -1;
	}
	kfree(raw_sector);
#ifdef DEBUG
	printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa);
#endif
	return is_xa;
}
Commit	Line	Data
1da177e4	1	#include <linux/kernel.h>
1da177e4 LT	2	#include <linux/mm.h>
	3	#include <linux/fs.h>
	4	#include <linux/errno.h>
	5	#include <linux/string.h>
	6	#include <linux/blkdev.h>
	7	#include <linux/blkpg.h>
	8	#include <linux/cdrom.h>
	9	#include <linux/delay.h>
5a0e3ad6	10	#include <linux/slab.h>
1da177e4 LT	11	#include <asm/io.h>
	12	#include <asm/uaccess.h>
	13
	14	#include <scsi/scsi.h>
	15	#include <scsi/scsi_dbg.h>
	16	#include <scsi/scsi_device.h>
	17	#include <scsi/scsi_eh.h>
	18	#include <scsi/scsi_host.h>
	19	#include <scsi/scsi_ioctl.h>
820732b5	20	#include <scsi/scsi_cmnd.h>
1da177e4 LT	21
	22	#include "sr.h"
	23
	24	#if 0
	25	#define DEBUG
	26	#endif
	27
	28	/* The sr_is_xa() seems to trigger firmware bugs with some drives :-(
	29	* It is off by default and can be turned on with this module parameter */
	30	static int xa_test = 0;
	31
	32	module_param(xa_test, int, S_IRUGO \| S_IWUSR);
	33
a09c6311 CH	34	/* primitive to determine whether we need to have GFP_DMA set based on
	35	* the status of the unchecked_isa_dma flag in the host structure */
	36	#define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0)
	37
	38
	39	static int sr_read_tochdr(struct cdrom_device_info *cdi,
	40	struct cdrom_tochdr *tochdr)
	41	{
	42	struct scsi_cd *cd = cdi->handle;
	43	struct packet_command cgc;
	44	int result;
	45	unsigned char *buffer;
	46
	47	buffer = kmalloc(32, GFP_KERNEL \| SR_GFP_DMA(cd));
	48	if (!buffer)
	49	return -ENOMEM;
	50
	51	memset(&cgc, 0, sizeof(struct packet_command));
	52	cgc.timeout = IOCTL_TIMEOUT;
	53	cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
	54	cgc.cmd[8] = 12; /* LSB of length */
	55	cgc.buffer = buffer;
	56	cgc.buflen = 12;
	57	cgc.quiet = 1;
	58	cgc.data_direction = DMA_FROM_DEVICE;
	59
	60	result = sr_do_ioctl(cd, &cgc);
	61
	62	tochdr->cdth_trk0 = buffer[2];
	63	tochdr->cdth_trk1 = buffer[3];
	64
	65	kfree(buffer);
	66	return result;
	67	}
	68
	69	static int sr_read_tocentry(struct cdrom_device_info *cdi,
	70	struct cdrom_tocentry *tocentry)
	71	{
	72	struct scsi_cd *cd = cdi->handle;
	73	struct packet_command cgc;
	74	int result;
	75	unsigned char *buffer;
	76
	77	buffer = kmalloc(32, GFP_KERNEL \| SR_GFP_DMA(cd));
	78	if (!buffer)
	79	return -ENOMEM;
	80
	81	memset(&cgc, 0, sizeof(struct packet_command));
	82	cgc.timeout = IOCTL_TIMEOUT;
	83	cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
	84	cgc.cmd[1] \|= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0;
	85	cgc.cmd[6] = tocentry->cdte_track;
	86	cgc.cmd[8] = 12; /* LSB of length */
	87	cgc.buffer = buffer;
	88	cgc.buflen = 12;
	89	cgc.data_direction = DMA_FROM_DEVICE;
	90
	91	result = sr_do_ioctl(cd, &cgc);
	92
	93	tocentry->cdte_ctrl = buffer[5] & 0xf;
	94	tocentry->cdte_adr = buffer[5] >> 4;
	95	tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
	96	if (tocentry->cdte_format == CDROM_MSF) {
	97	tocentry->cdte_addr.msf.minute = buffer[9];
98	tocentry->cdte_addr.msf.second = buffer[10];
99	tocentry->cdte_addr.msf.frame = buffer[11];
100	} else
101	tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
102	+ buffer[10]) << 8) + buffer[11];
103
104	kfree(buffer);
105	return result;
106	}
1da177e4 LT	107
	108	#define IOCTL_RETRIES 3
	109
	110	/* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command. When these drives
	111	are emulating a SCSI device via the idescsi module, they need to have
	112	CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */
	113
	114	static int sr_fake_playtrkind(struct cdrom_device_info cdi, struct cdrom_ti ti)
	115	{
	116	struct cdrom_tocentry trk0_te, trk1_te;
	117	struct cdrom_tochdr tochdr;
	118	struct packet_command cgc;
	119	int ntracks, ret;
	120
a09c6311 CH	121	ret = sr_read_tochdr(cdi, &tochdr);
a09c6311 CH	122	if (ret)
1da177e4 LT	123	return ret;
	124
	125	ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
	126
	127	if (ti->cdti_trk1 == ntracks)
	128	ti->cdti_trk1 = CDROM_LEADOUT;
	129	else if (ti->cdti_trk1 != CDROM_LEADOUT)
	130	ti->cdti_trk1 ++;
	131
	132	trk0_te.cdte_track = ti->cdti_trk0;
	133	trk0_te.cdte_format = CDROM_MSF;
	134	trk1_te.cdte_track = ti->cdti_trk1;
	135	trk1_te.cdte_format = CDROM_MSF;
	136
a09c6311 CH	137	ret = sr_read_tocentry(cdi, &trk0_te);
a09c6311 CH	138	if (ret)
1da177e4	139	return ret;
a09c6311 CH	140	ret = sr_read_tocentry(cdi, &trk1_te);
a09c6311 CH	141	if (ret)
1da177e4 LT	142	return ret;
	143
	144	memset(&cgc, 0, sizeof(struct packet_command));
	145	cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
	146	cgc.cmd[3] = trk0_te.cdte_addr.msf.minute;
	147	cgc.cmd[4] = trk0_te.cdte_addr.msf.second;
	148	cgc.cmd[5] = trk0_te.cdte_addr.msf.frame;
	149	cgc.cmd[6] = trk1_te.cdte_addr.msf.minute;
	150	cgc.cmd[7] = trk1_te.cdte_addr.msf.second;
	151	cgc.cmd[8] = trk1_te.cdte_addr.msf.frame;
	152	cgc.data_direction = DMA_NONE;
	153	cgc.timeout = IOCTL_TIMEOUT;
	154	return sr_do_ioctl(cdi->handle, &cgc);
	155	}
	156
a09c6311 CH	157	static int sr_play_trkind(struct cdrom_device_info *cdi,
	158	struct cdrom_ti *ti)
	159
	160	{
	161	struct scsi_cd *cd = cdi->handle;
	162	struct packet_command cgc;
	163	int result;
	164
	165	memset(&cgc, 0, sizeof(struct packet_command));
	166	cgc.timeout = IOCTL_TIMEOUT;
	167	cgc.cmd[0] = GPCMD_PLAYAUDIO_TI;
	168	cgc.cmd[4] = ti->cdti_trk0;
	169	cgc.cmd[5] = ti->cdti_ind0;
	170	cgc.cmd[7] = ti->cdti_trk1;
	171	cgc.cmd[8] = ti->cdti_ind1;
	172	cgc.data_direction = DMA_NONE;
	173
	174	result = sr_do_ioctl(cd, &cgc);
	175	if (result == -EDRIVE_CANT_DO_THIS)
	176	result = sr_fake_playtrkind(cdi, ti);
	177
	178	return result;
	179	}
	180
1da177e4 LT	181	/* We do our own retries because we want to know what the specific
	182	error code is. Normally the UNIT_ATTENTION code will automatically
	183	clear after one error */
	184
	185	int sr_do_ioctl(Scsi_CD cd, struct packet_command cgc)
	186	{
1da177e4	187	struct scsi_device *SDev;
820732b5	188	struct scsi_sense_hdr sshdr;
1da177e4	189	int result, err = 0, retries = 0;
820732b5	190	struct request_sense *sense = cgc->sense;
1da177e4 LT	191
1da177e4 LT	192	SDev = cd->device;
820732b5 JB	193
820732b5 JB	194	if (!sense) {
f716d830	195	sense = kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL);
820732b5 JB	196	if (!sense) {
	197	err = -ENOMEM;
	198	goto out;
	199	}
	200	}
1da177e4 LT	201
	202	retry:
	203	if (!scsi_block_when_processing_errors(SDev)) {
	204	err = -ENODEV;
820732b5	205	goto out;
1da177e4 LT	206	}
1da177e4 LT	207
820732b5 JB	208	memset(sense, 0, sizeof(*sense));
	209	result = scsi_execute(SDev, cgc->cmd, cgc->data_direction,
	210	cgc->buffer, cgc->buflen, (char *)sense,
f4f4e47e	211	cgc->timeout, IOCTL_RETRIES, 0, NULL);
1da177e4	212
820732b5	213	scsi_normalize_sense((char )sense, sizeof(sense), &sshdr);
1da177e4 LT	214
	215	/* Minimal error checking. Ignore cases we know about, and report the rest. */
	216	if (driver_byte(result) != 0) {
820732b5	217	switch (sshdr.sense_key) {
1da177e4 LT	218	case UNIT_ATTENTION:
	219	SDev->changed = 1;
	220	if (!cgc->quiet)
	221	printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name);
	222	if (retries++ < 10)
	223	goto retry;
	224	err = -ENOMEDIUM;
	225	break;
	226	case NOT_READY: /* This happens if there is no disc in drive */
820732b5 JB	227	if (sshdr.asc == 0x04 &&
820732b5 JB	228	sshdr.ascq == 0x01) {
1da177e4 LT	229	/* sense: Logical unit is in process of becoming ready */
	230	if (!cgc->quiet)
	231	printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name);
	232	if (retries++ < 10) {
	233	/* sleep 2 sec and try again */
	234	ssleep(2);
	235	goto retry;
	236	} else {
	237	/* 20 secs are enough? */
	238	err = -ENOMEDIUM;
	239	break;
	240	}
	241	}
	242	if (!cgc->quiet)
	243	printk(KERN_INFO "%s: CDROM not ready. Make sure there is a disc in the drive.\n", cd->cdi.name);
	244	#ifdef DEBUG
820732b5	245	scsi_print_sense_hdr("sr", &sshdr);
1da177e4 LT	246	#endif
	247	err = -ENOMEDIUM;
	248	break;
	249	case ILLEGAL_REQUEST:
	250	err = -EIO;
820732b5 JB	251	if (sshdr.asc == 0x20 &&
820732b5 JB	252	sshdr.ascq == 0x00)
1da177e4 LT	253	/* sense: Invalid command operation code */
	254	err = -EDRIVE_CANT_DO_THIS;
	255	#ifdef DEBUG
	256	__scsi_print_command(cgc->cmd);
820732b5	257	scsi_print_sense_hdr("sr", &sshdr);
1da177e4 LT	258	#endif
	259	break;
	260	default:
	261	printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name);
	262	__scsi_print_command(cgc->cmd);
820732b5	263	scsi_print_sense_hdr("sr", &sshdr);
1da177e4 LT	264	err = -EIO;
	265	}
	266	}
	267
1da177e4	268	/* Wake up a process waiting for device */
1da177e4	269	out:
820732b5 JB	270	if (!cgc->sense)
820732b5 JB	271	kfree(sense);
1da177e4 LT	272	cgc->stat = err;
	273	return err;
	274	}
	275
	276	/* ---------------------------------------------------------------------- */
	277	/* interface to cdrom.c */
	278
1da177e4 LT	279	int sr_tray_move(struct cdrom_device_info *cdi, int pos)
	280	{
	281	Scsi_CD *cd = cdi->handle;
	282	struct packet_command cgc;
	283
	284	memset(&cgc, 0, sizeof(struct packet_command));
	285	cgc.cmd[0] = GPCMD_START_STOP_UNIT;
	286	cgc.cmd[4] = (pos == 0) ? 0x03 /* close / : 0x02 / eject */ ;
	287	cgc.data_direction = DMA_NONE;
	288	cgc.timeout = IOCTL_TIMEOUT;
	289	return sr_do_ioctl(cd, &cgc);
	290	}
	291
	292	int sr_lock_door(struct cdrom_device_info *cdi, int lock)
	293	{
	294	Scsi_CD *cd = cdi->handle;
	295
	296	return scsi_set_medium_removal(cd->device, lock ?
	297	SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW);
	298	}
	299
	300	int sr_drive_status(struct cdrom_device_info *cdi, int slot)
	301	{
210ba1d1 JB	302	struct scsi_cd *cd = cdi->handle;
	303	struct scsi_sense_hdr sshdr;
	304	struct media_event_desc med;
	305
1da177e4 LT	306	if (CDSL_CURRENT != slot) {
	307	/* we have no changer support */
	308	return -EINVAL;
	309	}
38582a62	310	if (0 == sr_test_unit_ready(cd->device, &sshdr))
1da177e4 LT	311	return CDS_DISC_OK;
1da177e4 LT	312
96bcc722 PJ	313	/* SK/ASC/ASCQ of 2/4/1 means "unit is becoming ready" */
	314	if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY
	315	&& sshdr.asc == 0x04 && sshdr.ascq == 0x01)
	316	return CDS_DRIVE_NOT_READY;
	317
210ba1d1 JB	318	if (!cdrom_get_media_event(cdi, &med)) {
	319	if (med.media_present)
	320	return CDS_DISC_OK;
	321	else if (med.door_open)
	322	return CDS_TRAY_OPEN;
	323	else
	324	return CDS_NO_DISC;
	325	}
	326
b8479178 RJ	327	/*
	328	* SK/ASC/ASCQ of 2/4/2 means "initialization required"
	329	* Using CD_TRAY_OPEN results in an START_STOP_UNIT to close
	330	* the tray, which resolves the initialization requirement.
	331	*/
	332	if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY
	333	&& sshdr.asc == 0x04 && sshdr.ascq == 0x02)
	334	return CDS_TRAY_OPEN;
	335
210ba1d1 JB	336	/*
	337	* 0x04 is format in progress .. but there must be a disc present!
	338	*/
	339	if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04)
	340	return CDS_DISC_OK;
	341
	342	/*
	343	* If not using Mt Fuji extended media tray reports,
	344	* just return TRAY_OPEN since ATAPI doesn't provide
	345	* any other way to detect this...
	346	*/
	347	if (scsi_sense_valid(&sshdr) &&
	348	/* 0x3a is medium not present */
	349	sshdr.asc == 0x3a)
	350	return CDS_NO_DISC;
	351	else
	352	return CDS_TRAY_OPEN;
	353
	354	return CDS_DRIVE_NOT_READY;
1da177e4 LT	355	}
	356
	357	int sr_disk_status(struct cdrom_device_info *cdi)
	358	{
	359	Scsi_CD *cd = cdi->handle;
	360	struct cdrom_tochdr toc_h;
	361	struct cdrom_tocentry toc_e;
	362	int i, rc, have_datatracks = 0;
	363
	364	/* look for data tracks */
a09c6311 CH	365	rc = sr_read_tochdr(cdi, &toc_h);
a09c6311 CH	366	if (rc)
1da177e4 LT	367	return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
	368
	369	for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
	370	toc_e.cdte_track = i;
	371	toc_e.cdte_format = CDROM_LBA;
a09c6311	372	if (sr_read_tocentry(cdi, &toc_e))
1da177e4 LT	373	return CDS_NO_INFO;
	374	if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
	375	have_datatracks = 1;
	376	break;
	377	}
	378	}
	379	if (!have_datatracks)
	380	return CDS_AUDIO;
	381
	382	if (cd->xa_flag)
	383	return CDS_XA_2_1;
	384	else
	385	return CDS_DATA_1;
	386	}
	387
	388	int sr_get_last_session(struct cdrom_device_info *cdi,
	389	struct cdrom_multisession *ms_info)
	390	{
	391	Scsi_CD *cd = cdi->handle;
	392
	393	ms_info->addr.lba = cd->ms_offset;
	394	ms_info->xa_flag = cd->xa_flag \|\| cd->ms_offset > 0;
	395
	396	return 0;
	397	}
	398
1da177e4 LT	399	int sr_get_mcn(struct cdrom_device_info cdi, struct cdrom_mcn mcn)
	400	{
	401	Scsi_CD *cd = cdi->handle;
	402	struct packet_command cgc;
	403	char *buffer = kmalloc(32, GFP_KERNEL \| SR_GFP_DMA(cd));
	404	int result;
	405
3a73e8c7 ND	406	if (!buffer)
	407	return -ENOMEM;
	408
1da177e4 LT	409	memset(&cgc, 0, sizeof(struct packet_command));
	410	cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
	411	cgc.cmd[2] = 0x40; /* I do want the subchannel info */
	412	cgc.cmd[3] = 0x02; /* Give me medium catalog number info */
	413	cgc.cmd[8] = 24;
	414	cgc.buffer = buffer;
	415	cgc.buflen = 24;
	416	cgc.data_direction = DMA_FROM_DEVICE;
	417	cgc.timeout = IOCTL_TIMEOUT;
	418	result = sr_do_ioctl(cd, &cgc);
	419
	420	memcpy(mcn->medium_catalog_number, buffer + 9, 13);
	421	mcn->medium_catalog_number[13] = 0;
	422
	423	kfree(buffer);
	424	return result;
	425	}
	426
	427	int sr_reset(struct cdrom_device_info *cdi)
	428	{
	429	return 0;
	430	}
	431
	432	int sr_select_speed(struct cdrom_device_info *cdi, int speed)
	433	{
	434	Scsi_CD *cd = cdi->handle;
	435	struct packet_command cgc;
	436
	437	if (speed == 0)
	438	speed = 0xffff; /* set to max */
	439	else
	440	speed = 177; / Nx to kbyte/s */
	441
	442	memset(&cgc, 0, sizeof(struct packet_command));
	443	cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */
	444	cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */
	445	cgc.cmd[3] = speed & 0xff; /* LSB */
	446	cgc.data_direction = DMA_NONE;
	447	cgc.timeout = IOCTL_TIMEOUT;
	448
	449	if (sr_do_ioctl(cd, &cgc))
	450	return -EIO;
	451	return 0;
	452	}
	453
	454	/* ----------------------------------------------------------------------- */
	455	/* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */
	456	/* because the generic cdrom driver does the user access stuff for us. */
	457	/* only cdromreadtochdr and cdromreadtocentry are left - for use with the */
	458	/* sr_disk_status interface for the generic cdrom driver. */
	459
	460	int sr_audio_ioctl(struct cdrom_device_info cdi, unsigned int cmd, void arg)
	461	{
1da177e4 LT	462	switch (cmd) {
1da177e4 LT	463	case CDROMREADTOCHDR:
a09c6311	464	return sr_read_tochdr(cdi, arg);
1da177e4	465	case CDROMREADTOCENTRY:
a09c6311 CH	466	return sr_read_tocentry(cdi, arg);
	467	case CDROMPLAYTRKIND:
	468	return sr_play_trkind(cdi, arg);
1da177e4	469	default:
a09c6311	470	return -EINVAL;
1da177e4	471	}
1da177e4 LT	472	}
	473
	474	/* -----------------------------------------------------------------------
	475	* a function to read all sorts of funny cdrom sectors using the READ_CD
	476	* scsi-3 mmc command
	477	*
	478	* lba: linear block address
	479	* format: 0 = data (anything)
	480	* 1 = audio
	481	* 2 = data (mode 1)
	482	* 3 = data (mode 2)
	483	* 4 = data (mode 2 form1)
	484	* 5 = data (mode 2 form2)
	485	* blksize: 2048 \| 2336 \| 2340 \| 2352
	486	*/
	487
	488	static int sr_read_cd(Scsi_CD cd, unsigned char dest, int lba, int format, int blksize)
	489	{
	490	struct packet_command cgc;
	491
	492	#ifdef DEBUG
	493	printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n",
	494	cd->cdi.name, lba, format, blksize);
	495	#endif
	496
	497	memset(&cgc, 0, sizeof(struct packet_command));
	498	cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */
	499	cgc.cmd[1] = ((format & 7) << 2);
	500	cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
	501	cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
	502	cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
	503	cgc.cmd[5] = (unsigned char) lba & 0xff;
	504	cgc.cmd[8] = 1;
	505	switch (blksize) {
	506	case 2336:
	507	cgc.cmd[9] = 0x58;
	508	break;
	509	case 2340:
	510	cgc.cmd[9] = 0x78;
	511	break;
	512	case 2352:
	513	cgc.cmd[9] = 0xf8;
	514	break;
	515	default:
	516	cgc.cmd[9] = 0x10;
	517	break;
	518	}
	519	cgc.buffer = dest;
	520	cgc.buflen = blksize;
	521	cgc.data_direction = DMA_FROM_DEVICE;
	522	cgc.timeout = IOCTL_TIMEOUT;
	523	return sr_do_ioctl(cd, &cgc);
	524	}
	525
	526	/*
	527	* read sectors with blocksizes other than 2048
	528	*/
	529
	530	static int sr_read_sector(Scsi_CD cd, int lba, int blksize, unsigned char dest)
	531	{
	532	struct packet_command cgc;
	533	int rc;
	534
	535	/* we try the READ CD command first... */
536	if (cd->readcd_known) {
537	rc = sr_read_cd(cd, dest, lba, 0, blksize);
538	if (-EDRIVE_CANT_DO_THIS != rc)
539	return rc;
540	cd->readcd_known = 0;
541	printk("CDROM does'nt support READ CD (0xbe) command\n");
542	/* fall & retry the other way */
543	}
544	/* ... if this fails, we switch the blocksize using MODE SELECT */
545	if (blksize != cd->device->sector_size) {
546	if (0 != (rc = sr_set_blocklength(cd, blksize)))
547	return rc;
548	}
549	#ifdef DEBUG
550	printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize);
551	#endif
552
553	memset(&cgc, 0, sizeof(struct packet_command));
554	cgc.cmd[0] = GPCMD_READ_10;
555	cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
556	cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
557	cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
558	cgc.cmd[5] = (unsigned char) lba & 0xff;
559	cgc.cmd[8] = 1;
560	cgc.buffer = dest;
561	cgc.buflen = blksize;
562	cgc.data_direction = DMA_FROM_DEVICE;
563	cgc.timeout = IOCTL_TIMEOUT;
564	rc = sr_do_ioctl(cd, &cgc);
565
566	return rc;
567	}
568
569	/*
570	* read a sector in raw mode to check the sector format
571	* ret: 1 == mode2 (XA), 0 == mode1, <0 == error
572	*/
573
574	int sr_is_xa(Scsi_CD *cd)
575	{
576	unsigned char *raw_sector;
577	int is_xa;
578
579	if (!xa_test)
580	return 0;
581
5cbded58	582	raw_sector = kmalloc(2048, GFP_KERNEL \| SR_GFP_DMA(cd));
1da177e4 LT	583	if (!raw_sector)
	584	return -ENOMEM;
	585	if (0 == sr_read_sector(cd, cd->ms_offset + 16,
	586	CD_FRAMESIZE_RAW1, raw_sector)) {
	587	is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
	588	} else {
	589	/* read a raw sector failed for some reason. */
	590	is_xa = -1;
	591	}
	592	kfree(raw_sector);
	593	#ifdef DEBUG
	594	printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa);
	595	#endif
	596	return is_xa;
	597	}