[linux-2.6-block.git] / drivers / scsi / sr_ioctl.c

// SPDX-License-Identifier: GPL-2.0
#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/module.h>
#include <linux/blkpg.h>
#include <linux/cdrom.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <linux/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;
	unsigned char sense_buffer[SCSI_SENSE_BUFFERSIZE], *senseptr = NULL;

	SDev = cd->device;

	if (cgc->sense)
		senseptr = sense_buffer;

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

	result = scsi_execute(SDev, cgc->cmd, cgc->data_direction,
			      cgc->buffer, cgc->buflen, senseptr, &sshdr,
			      cgc->timeout, IOCTL_RETRIES, 0, 0, NULL);

	if (cgc->sense)
		memcpy(cgc->sense, sense_buffer, sizeof(*cgc->sense));

	/* 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)
				sr_printk(KERN_INFO, cd,
					  "disc change detected.\n");
			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)
					sr_printk(KERN_INFO, cd,
						  "CDROM not ready yet.\n");
				if (retries++ < 10) {
					/* sleep 2 sec and try again */
					ssleep(2);
					goto retry;
				} else {
					/* 20 secs are enough? */
					err = -ENOMEDIUM;
					break;
				}
			}
			if (!cgc->quiet)
				sr_printk(KERN_INFO, cd,
					  "CDROM not ready.  Make sure there "
					  "is a disc in the drive.\n");
			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;
			break;
		default:
			err = -EIO;
		}
	}

	/* Wake up a process waiting for device */
      out:
	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 (!scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &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
	sr_printk(KERN_INFO, cd, "sr_read_cd lba=%d format=%d blksize=%d\n",
		  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;
		sr_printk(KERN_INFO, cd,
			  "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
	sr_printk(KERN_INFO, cd, "sr_read_sector lba=%d blksize=%d\n",
		  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
	sr_printk(KERN_INFO, cd, "sr_is_xa: %d\n", is_xa);
#endif
	return is_xa;
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4	2	#include <linux/kernel.h>
1da177e4 LT	3	#include <linux/mm.h>
	4	#include <linux/fs.h>
	5	#include <linux/errno.h>
	6	#include <linux/string.h>
	7	#include <linux/blkdev.h>
acf3368f	8	#include <linux/module.h>
1da177e4 LT	9	#include <linux/blkpg.h>
	10	#include <linux/cdrom.h>
	11	#include <linux/delay.h>
5a0e3ad6	12	#include <linux/slab.h>
1da177e4	13	#include <asm/io.h>
7c0f6ba6	14	#include <linux/uaccess.h>
1da177e4 LT	15
	16	#include <scsi/scsi.h>
	17	#include <scsi/scsi_dbg.h>
	18	#include <scsi/scsi_device.h>
	19	#include <scsi/scsi_eh.h>
	20	#include <scsi/scsi_host.h>
	21	#include <scsi/scsi_ioctl.h>
820732b5	22	#include <scsi/scsi_cmnd.h>
1da177e4 LT	23
	24	#include "sr.h"
	25
	26	#if 0
	27	#define DEBUG
	28	#endif
	29
	30	/* The sr_is_xa() seems to trigger firmware bugs with some drives :-(
	31	* It is off by default and can be turned on with this module parameter */
	32	static int xa_test = 0;
	33
	34	module_param(xa_test, int, S_IRUGO \| S_IWUSR);
	35
a09c6311 CH	36	/* primitive to determine whether we need to have GFP_DMA set based on
	37	* the status of the unchecked_isa_dma flag in the host structure */
	38	#define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0)
	39
a09c6311 CH	40	static int sr_read_tochdr(struct cdrom_device_info *cdi,
	41	struct cdrom_tochdr *tochdr)
	42	{
	43	struct scsi_cd *cd = cdi->handle;
	44	struct packet_command cgc;
	45	int result;
	46	unsigned char *buffer;
	47
	48	buffer = kmalloc(32, GFP_KERNEL \| SR_GFP_DMA(cd));
	49	if (!buffer)
	50	return -ENOMEM;
	51
	52	memset(&cgc, 0, sizeof(struct packet_command));
	53	cgc.timeout = IOCTL_TIMEOUT;
	54	cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
	55	cgc.cmd[8] = 12; /* LSB of length */
	56	cgc.buffer = buffer;
	57	cgc.buflen = 12;
	58	cgc.quiet = 1;
	59	cgc.data_direction = DMA_FROM_DEVICE;
	60
	61	result = sr_do_ioctl(cd, &cgc);
	62
	63	tochdr->cdth_trk0 = buffer[2];
	64	tochdr->cdth_trk1 = buffer[3];
	65
	66	kfree(buffer);
	67	return result;
	68	}
	69
	70	static int sr_read_tocentry(struct cdrom_device_info *cdi,
	71	struct cdrom_tocentry *tocentry)
	72	{
	73	struct scsi_cd *cd = cdi->handle;
	74	struct packet_command cgc;
	75	int result;
	76	unsigned char *buffer;
	77
	78	buffer = kmalloc(32, GFP_KERNEL \| SR_GFP_DMA(cd));
	79	if (!buffer)
	80	return -ENOMEM;
	81
	82	memset(&cgc, 0, sizeof(struct packet_command));
	83	cgc.timeout = IOCTL_TIMEOUT;
	84	cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
	85	cgc.cmd[1] \|= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0;
	86	cgc.cmd[6] = tocentry->cdte_track;
	87	cgc.cmd[8] = 12; /* LSB of length */
	88	cgc.buffer = buffer;
	89	cgc.buflen = 12;
	90	cgc.data_direction = DMA_FROM_DEVICE;
	91
	92	result = sr_do_ioctl(cd, &cgc);
	93
	94	tocentry->cdte_ctrl = buffer[5] & 0xf;
	95	tocentry->cdte_adr = buffer[5] >> 4;
	96	tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
	97	if (tocentry->cdte_format == CDROM_MSF) {
	98	tocentry->cdte_addr.msf.minute = buffer[9];
	99	tocentry->cdte_addr.msf.second = buffer[10];
	100	tocentry->cdte_addr.msf.frame = buffer[11];
	101	} else
	102	tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
	103	+ buffer[10]) << 8) + buffer[11];
104
105	kfree(buffer);
106	return result;
107	}
1da177e4 LT	108
	109	#define IOCTL_RETRIES 3
	110
	111	/* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command. When these drives
	112	are emulating a SCSI device via the idescsi module, they need to have
	113	CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */
	114
	115	static int sr_fake_playtrkind(struct cdrom_device_info cdi, struct cdrom_ti ti)
	116	{
	117	struct cdrom_tocentry trk0_te, trk1_te;
	118	struct cdrom_tochdr tochdr;
	119	struct packet_command cgc;
	120	int ntracks, ret;
	121
a09c6311 CH	122	ret = sr_read_tochdr(cdi, &tochdr);
a09c6311 CH	123	if (ret)
1da177e4 LT	124	return ret;
	125
	126	ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
	127
	128	if (ti->cdti_trk1 == ntracks)
	129	ti->cdti_trk1 = CDROM_LEADOUT;
	130	else if (ti->cdti_trk1 != CDROM_LEADOUT)
	131	ti->cdti_trk1 ++;
	132
	133	trk0_te.cdte_track = ti->cdti_trk0;
	134	trk0_te.cdte_format = CDROM_MSF;
	135	trk1_te.cdte_track = ti->cdti_trk1;
	136	trk1_te.cdte_format = CDROM_MSF;
	137
a09c6311 CH	138	ret = sr_read_tocentry(cdi, &trk0_te);
a09c6311 CH	139	if (ret)
1da177e4	140	return ret;
a09c6311 CH	141	ret = sr_read_tocentry(cdi, &trk1_te);
a09c6311 CH	142	if (ret)
1da177e4 LT	143	return ret;
	144
	145	memset(&cgc, 0, sizeof(struct packet_command));
	146	cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
	147	cgc.cmd[3] = trk0_te.cdte_addr.msf.minute;
	148	cgc.cmd[4] = trk0_te.cdte_addr.msf.second;
	149	cgc.cmd[5] = trk0_te.cdte_addr.msf.frame;
	150	cgc.cmd[6] = trk1_te.cdte_addr.msf.minute;
	151	cgc.cmd[7] = trk1_te.cdte_addr.msf.second;
	152	cgc.cmd[8] = trk1_te.cdte_addr.msf.frame;
	153	cgc.data_direction = DMA_NONE;
	154	cgc.timeout = IOCTL_TIMEOUT;
	155	return sr_do_ioctl(cdi->handle, &cgc);
	156	}
	157
a09c6311 CH	158	static int sr_play_trkind(struct cdrom_device_info *cdi,
	159	struct cdrom_ti *ti)
	160
	161	{
	162	struct scsi_cd *cd = cdi->handle;
	163	struct packet_command cgc;
	164	int result;
	165
	166	memset(&cgc, 0, sizeof(struct packet_command));
	167	cgc.timeout = IOCTL_TIMEOUT;
	168	cgc.cmd[0] = GPCMD_PLAYAUDIO_TI;
	169	cgc.cmd[4] = ti->cdti_trk0;
	170	cgc.cmd[5] = ti->cdti_ind0;
	171	cgc.cmd[7] = ti->cdti_trk1;
	172	cgc.cmd[8] = ti->cdti_ind1;
	173	cgc.data_direction = DMA_NONE;
	174
	175	result = sr_do_ioctl(cd, &cgc);
	176	if (result == -EDRIVE_CANT_DO_THIS)
	177	result = sr_fake_playtrkind(cdi, ti);
	178
	179	return result;
	180	}
	181
1da177e4 LT	182	/* We do our own retries because we want to know what the specific
	183	error code is. Normally the UNIT_ATTENTION code will automatically
	184	clear after one error */
	185
	186	int sr_do_ioctl(Scsi_CD cd, struct packet_command cgc)
	187	{
1da177e4	188	struct scsi_device *SDev;
820732b5	189	struct scsi_sense_hdr sshdr;
1da177e4	190	int result, err = 0, retries = 0;
f7068114	191	unsigned char sense_buffer[SCSI_SENSE_BUFFERSIZE], *senseptr = NULL;
1da177e4 LT	192
1da177e4 LT	193	SDev = cd->device;
820732b5	194
f7068114 JA	195	if (cgc->sense)
	196	senseptr = sense_buffer;
	197
1da177e4 LT	198	retry:
	199	if (!scsi_block_when_processing_errors(SDev)) {
	200	err = -ENODEV;
820732b5	201	goto out;
1da177e4 LT	202	}
1da177e4 LT	203
820732b5	204	result = scsi_execute(SDev, cgc->cmd, cgc->data_direction,
f7068114	205	cgc->buffer, cgc->buflen, senseptr, &sshdr,
76aaf87b	206	cgc->timeout, IOCTL_RETRIES, 0, 0, NULL);
1da177e4	207
f7068114 JA	208	if (cgc->sense)
	209	memcpy(cgc->sense, sense_buffer, sizeof(*cgc->sense));
	210
1da177e4 LT	211	/* Minimal error checking. Ignore cases we know about, and report the rest. */
1da177e4 LT	212	if (driver_byte(result) != 0) {
820732b5	213	switch (sshdr.sense_key) {
1da177e4 LT	214	case UNIT_ATTENTION:
	215	SDev->changed = 1;
	216	if (!cgc->quiet)
96eefad2 HR	217	sr_printk(KERN_INFO, cd,
96eefad2 HR	218	"disc change detected.\n");
1da177e4 LT	219	if (retries++ < 10)
	220	goto retry;
	221	err = -ENOMEDIUM;
	222	break;
	223	case NOT_READY: /* This happens if there is no disc in drive */
820732b5 JB	224	if (sshdr.asc == 0x04 &&
820732b5 JB	225	sshdr.ascq == 0x01) {
1da177e4 LT	226	/* sense: Logical unit is in process of becoming ready */
1da177e4 LT	227	if (!cgc->quiet)
96eefad2 HR	228	sr_printk(KERN_INFO, cd,
96eefad2 HR	229	"CDROM not ready yet.\n");
1da177e4 LT	230	if (retries++ < 10) {
	231	/* sleep 2 sec and try again */
	232	ssleep(2);
	233	goto retry;
	234	} else {
	235	/* 20 secs are enough? */
	236	err = -ENOMEDIUM;
	237	break;
	238	}
	239	}
	240	if (!cgc->quiet)
96eefad2 HR	241	sr_printk(KERN_INFO, cd,
	242	"CDROM not ready. Make sure there "
	243	"is a disc in the drive.\n");
1da177e4 LT	244	err = -ENOMEDIUM;
	245	break;
	246	case ILLEGAL_REQUEST:
	247	err = -EIO;
820732b5 JB	248	if (sshdr.asc == 0x20 &&
820732b5 JB	249	sshdr.ascq == 0x00)
1da177e4 LT	250	/* sense: Invalid command operation code */
1da177e4 LT	251	err = -EDRIVE_CANT_DO_THIS;
1da177e4 LT	252	break;
1da177e4 LT	253	default:
1da177e4 LT	254	err = -EIO;
	255	}
	256	}
	257
1da177e4	258	/* Wake up a process waiting for device */
1da177e4 LT	259	out:
	260	cgc->stat = err;
	261	return err;
	262	}
	263
	264	/* ---------------------------------------------------------------------- */
	265	/* interface to cdrom.c */
	266
1da177e4 LT	267	int sr_tray_move(struct cdrom_device_info *cdi, int pos)
	268	{
	269	Scsi_CD *cd = cdi->handle;
	270	struct packet_command cgc;
	271
	272	memset(&cgc, 0, sizeof(struct packet_command));
	273	cgc.cmd[0] = GPCMD_START_STOP_UNIT;
	274	cgc.cmd[4] = (pos == 0) ? 0x03 /* close / : 0x02 / eject */ ;
	275	cgc.data_direction = DMA_NONE;
	276	cgc.timeout = IOCTL_TIMEOUT;
	277	return sr_do_ioctl(cd, &cgc);
	278	}
	279
	280	int sr_lock_door(struct cdrom_device_info *cdi, int lock)
	281	{
	282	Scsi_CD *cd = cdi->handle;
	283
	284	return scsi_set_medium_removal(cd->device, lock ?
	285	SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW);
	286	}
	287
	288	int sr_drive_status(struct cdrom_device_info *cdi, int slot)
	289	{
210ba1d1 JB	290	struct scsi_cd *cd = cdi->handle;
	291	struct scsi_sense_hdr sshdr;
	292	struct media_event_desc med;
	293
1da177e4 LT	294	if (CDSL_CURRENT != slot) {
	295	/* we have no changer support */
	296	return -EINVAL;
	297	}
9f8a2c23	298	if (!scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr))
1da177e4 LT	299	return CDS_DISC_OK;
1da177e4 LT	300
96bcc722 PJ	301	/* SK/ASC/ASCQ of 2/4/1 means "unit is becoming ready" */
	302	if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY
	303	&& sshdr.asc == 0x04 && sshdr.ascq == 0x01)
	304	return CDS_DRIVE_NOT_READY;
	305
210ba1d1 JB	306	if (!cdrom_get_media_event(cdi, &med)) {
	307	if (med.media_present)
	308	return CDS_DISC_OK;
	309	else if (med.door_open)
	310	return CDS_TRAY_OPEN;
	311	else
	312	return CDS_NO_DISC;
	313	}
	314
b8479178 RJ	315	/*
	316	* SK/ASC/ASCQ of 2/4/2 means "initialization required"
	317	* Using CD_TRAY_OPEN results in an START_STOP_UNIT to close
	318	* the tray, which resolves the initialization requirement.
	319	*/
	320	if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY
	321	&& sshdr.asc == 0x04 && sshdr.ascq == 0x02)
	322	return CDS_TRAY_OPEN;
	323
210ba1d1 JB	324	/*
	325	* 0x04 is format in progress .. but there must be a disc present!
	326	*/
	327	if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04)
	328	return CDS_DISC_OK;
	329
	330	/*
	331	* If not using Mt Fuji extended media tray reports,
	332	* just return TRAY_OPEN since ATAPI doesn't provide
	333	* any other way to detect this...
	334	*/
	335	if (scsi_sense_valid(&sshdr) &&
	336	/* 0x3a is medium not present */
	337	sshdr.asc == 0x3a)
	338	return CDS_NO_DISC;
	339	else
	340	return CDS_TRAY_OPEN;
	341
	342	return CDS_DRIVE_NOT_READY;
1da177e4 LT	343	}
	344
	345	int sr_disk_status(struct cdrom_device_info *cdi)
	346	{
	347	Scsi_CD *cd = cdi->handle;
	348	struct cdrom_tochdr toc_h;
	349	struct cdrom_tocentry toc_e;
	350	int i, rc, have_datatracks = 0;
	351
	352	/* look for data tracks */
a09c6311 CH	353	rc = sr_read_tochdr(cdi, &toc_h);
a09c6311 CH	354	if (rc)
1da177e4 LT	355	return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
	356
	357	for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
	358	toc_e.cdte_track = i;
	359	toc_e.cdte_format = CDROM_LBA;
a09c6311	360	if (sr_read_tocentry(cdi, &toc_e))
1da177e4 LT	361	return CDS_NO_INFO;
	362	if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
	363	have_datatracks = 1;
	364	break;
	365	}
	366	}
	367	if (!have_datatracks)
	368	return CDS_AUDIO;
	369
	370	if (cd->xa_flag)
	371	return CDS_XA_2_1;
	372	else
	373	return CDS_DATA_1;
	374	}
	375
	376	int sr_get_last_session(struct cdrom_device_info *cdi,
	377	struct cdrom_multisession *ms_info)
	378	{
	379	Scsi_CD *cd = cdi->handle;
	380
	381	ms_info->addr.lba = cd->ms_offset;
	382	ms_info->xa_flag = cd->xa_flag \|\| cd->ms_offset > 0;
	383
	384	return 0;
	385	}
	386
1da177e4 LT	387	int sr_get_mcn(struct cdrom_device_info cdi, struct cdrom_mcn mcn)
	388	{
	389	Scsi_CD *cd = cdi->handle;
	390	struct packet_command cgc;
	391	char *buffer = kmalloc(32, GFP_KERNEL \| SR_GFP_DMA(cd));
	392	int result;
	393
3a73e8c7 ND	394	if (!buffer)
	395	return -ENOMEM;
	396
1da177e4 LT	397	memset(&cgc, 0, sizeof(struct packet_command));
	398	cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
	399	cgc.cmd[2] = 0x40; /* I do want the subchannel info */
	400	cgc.cmd[3] = 0x02; /* Give me medium catalog number info */
	401	cgc.cmd[8] = 24;
	402	cgc.buffer = buffer;
	403	cgc.buflen = 24;
	404	cgc.data_direction = DMA_FROM_DEVICE;
	405	cgc.timeout = IOCTL_TIMEOUT;
	406	result = sr_do_ioctl(cd, &cgc);
	407
	408	memcpy(mcn->medium_catalog_number, buffer + 9, 13);
	409	mcn->medium_catalog_number[13] = 0;
	410
	411	kfree(buffer);
	412	return result;
	413	}
	414
	415	int sr_reset(struct cdrom_device_info *cdi)
	416	{
	417	return 0;
	418	}
	419
	420	int sr_select_speed(struct cdrom_device_info *cdi, int speed)
	421	{
	422	Scsi_CD *cd = cdi->handle;
	423	struct packet_command cgc;
	424
	425	if (speed == 0)
	426	speed = 0xffff; /* set to max */
	427	else
	428	speed = 177; / Nx to kbyte/s */
	429
	430	memset(&cgc, 0, sizeof(struct packet_command));
	431	cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */
	432	cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */
	433	cgc.cmd[3] = speed & 0xff; /* LSB */
	434	cgc.data_direction = DMA_NONE;
	435	cgc.timeout = IOCTL_TIMEOUT;
	436
	437	if (sr_do_ioctl(cd, &cgc))
	438	return -EIO;
	439	return 0;
	440	}
	441
	442	/* ----------------------------------------------------------------------- */
	443	/* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */
	444	/* because the generic cdrom driver does the user access stuff for us. */
	445	/* only cdromreadtochdr and cdromreadtocentry are left - for use with the */
	446	/* sr_disk_status interface for the generic cdrom driver. */
	447
	448	int sr_audio_ioctl(struct cdrom_device_info cdi, unsigned int cmd, void arg)
	449	{
1da177e4 LT	450	switch (cmd) {
1da177e4 LT	451	case CDROMREADTOCHDR:
a09c6311	452	return sr_read_tochdr(cdi, arg);
1da177e4	453	case CDROMREADTOCENTRY:
a09c6311 CH	454	return sr_read_tocentry(cdi, arg);
	455	case CDROMPLAYTRKIND:
	456	return sr_play_trkind(cdi, arg);
1da177e4	457	default:
a09c6311	458	return -EINVAL;
1da177e4	459	}
1da177e4 LT	460	}
	461
	462	/* -----------------------------------------------------------------------
	463	* a function to read all sorts of funny cdrom sectors using the READ_CD
	464	* scsi-3 mmc command
	465	*
	466	* lba: linear block address
	467	* format: 0 = data (anything)
	468	* 1 = audio
	469	* 2 = data (mode 1)
	470	* 3 = data (mode 2)
	471	* 4 = data (mode 2 form1)
	472	* 5 = data (mode 2 form2)
	473	* blksize: 2048 \| 2336 \| 2340 \| 2352
	474	*/
	475
	476	static int sr_read_cd(Scsi_CD cd, unsigned char dest, int lba, int format, int blksize)
	477	{
	478	struct packet_command cgc;
	479
	480	#ifdef DEBUG
96eefad2 HR	481	sr_printk(KERN_INFO, cd, "sr_read_cd lba=%d format=%d blksize=%d\n",
96eefad2 HR	482	lba, format, blksize);
1da177e4 LT	483	#endif
	484
	485	memset(&cgc, 0, sizeof(struct packet_command));
	486	cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */
	487	cgc.cmd[1] = ((format & 7) << 2);
	488	cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
	489	cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
	490	cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
	491	cgc.cmd[5] = (unsigned char) lba & 0xff;
	492	cgc.cmd[8] = 1;
	493	switch (blksize) {
	494	case 2336:
	495	cgc.cmd[9] = 0x58;
	496	break;
	497	case 2340:
	498	cgc.cmd[9] = 0x78;
	499	break;
	500	case 2352:
	501	cgc.cmd[9] = 0xf8;
	502	break;
	503	default:
	504	cgc.cmd[9] = 0x10;
	505	break;
	506	}
	507	cgc.buffer = dest;
	508	cgc.buflen = blksize;
	509	cgc.data_direction = DMA_FROM_DEVICE;
	510	cgc.timeout = IOCTL_TIMEOUT;
	511	return sr_do_ioctl(cd, &cgc);
	512	}
	513
	514	/*
	515	* read sectors with blocksizes other than 2048
	516	*/
	517
	518	static int sr_read_sector(Scsi_CD cd, int lba, int blksize, unsigned char dest)
	519	{
	520	struct packet_command cgc;
	521	int rc;
	522
	523	/* we try the READ CD command first... */
	524	if (cd->readcd_known) {
	525	rc = sr_read_cd(cd, dest, lba, 0, blksize);
	526	if (-EDRIVE_CANT_DO_THIS != rc)
	527	return rc;
	528	cd->readcd_known = 0;
96eefad2 HR	529	sr_printk(KERN_INFO, cd,
96eefad2 HR	530	"CDROM does'nt support READ CD (0xbe) command\n");
1da177e4 LT	531	/* fall & retry the other way */
	532	}
	533	/* ... if this fails, we switch the blocksize using MODE SELECT */
	534	if (blksize != cd->device->sector_size) {
	535	if (0 != (rc = sr_set_blocklength(cd, blksize)))
	536	return rc;
	537	}
	538	#ifdef DEBUG
96eefad2 HR	539	sr_printk(KERN_INFO, cd, "sr_read_sector lba=%d blksize=%d\n",
96eefad2 HR	540	lba, blksize);
1da177e4 LT	541	#endif
	542
	543	memset(&cgc, 0, sizeof(struct packet_command));
	544	cgc.cmd[0] = GPCMD_READ_10;
	545	cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
	546	cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
	547	cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
	548	cgc.cmd[5] = (unsigned char) lba & 0xff;
	549	cgc.cmd[8] = 1;
	550	cgc.buffer = dest;
	551	cgc.buflen = blksize;
	552	cgc.data_direction = DMA_FROM_DEVICE;
	553	cgc.timeout = IOCTL_TIMEOUT;
	554	rc = sr_do_ioctl(cd, &cgc);
	555
	556	return rc;
	557	}
	558
	559	/*
	560	* read a sector in raw mode to check the sector format
	561	* ret: 1 == mode2 (XA), 0 == mode1, <0 == error
	562	*/
	563
	564	int sr_is_xa(Scsi_CD *cd)
	565	{
	566	unsigned char *raw_sector;
	567	int is_xa;
	568
	569	if (!xa_test)
	570	return 0;
	571
5cbded58	572	raw_sector = kmalloc(2048, GFP_KERNEL \| SR_GFP_DMA(cd));
1da177e4 LT	573	if (!raw_sector)
	574	return -ENOMEM;
	575	if (0 == sr_read_sector(cd, cd->ms_offset + 16,
	576	CD_FRAMESIZE_RAW1, raw_sector)) {
	577	is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
	578	} else {
	579	/* read a raw sector failed for some reason. */
	580	is_xa = -1;
	581	}
	582	kfree(raw_sector);
	583	#ifdef DEBUG
96eefad2	584	sr_printk(KERN_INFO, cd, "sr_is_xa: %d\n", is_xa);
1da177e4 LT	585	#endif
	586	return is_xa;
	587	}