[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / scsi / sr_ioctl.c

#include <linux/kernel.h>
#include <linux/sched.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 <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 = kzalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
	if (!buffer)
		return -ENOMEM;

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

	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(sizeof(*sense), 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);

	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                                                   */

static int test_unit_ready(Scsi_CD *cd)
{
	struct packet_command cgc;

	memset(&cgc, 0, sizeof(struct packet_command));
	cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
	cgc.quiet = 1;
	cgc.data_direction = DMA_NONE;
	cgc.timeout = IOCTL_TIMEOUT;
	return sr_do_ioctl(cd, &cgc);
}

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)
{
	if (CDSL_CURRENT != slot) {
		/* we have no changer support */
		return -EINVAL;
	}
	if (0 == test_unit_ready(cdi->handle))
		return CDS_DISC_OK;

	return CDS_TRAY_OPEN;
}

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 = (unsigned char *) 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;
}

int sr_dev_ioctl(struct cdrom_device_info *cdi,
		 unsigned int cmd, unsigned long arg)
{
	Scsi_CD *cd = cdi->handle;
	int ret;
	
	ret = scsi_nonblockable_ioctl(cd->device, cmd,
				      (void __user *)arg, NULL);
	/*
	 * ENODEV means that we didn't recognise the ioctl, or that we
	 * cannot execute it in the current device state.  In either
	 * case fall through to scsi_ioctl, which will return ENDOEV again
	 * if it doesn't recognise the ioctl
	 */
	if (ret != -ENODEV)
		return ret;
	return scsi_ioctl(cd->device, cmd, (void __user *)arg);
}
Commit	Line	Data
1da177e4 LT	1	#include <linux/kernel.h>
	2	#include <linux/sched.h>
	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>
	8	#include <linux/blkpg.h>
	9	#include <linux/cdrom.h>
	10	#include <linux/delay.h>
	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
24669f75	47	buffer = kzalloc(32, GFP_KERNEL \| SR_GFP_DMA(cd));
a09c6311 CH	48	if (!buffer)
	49	return -ENOMEM;
	50
a09c6311 CH	51	cgc.timeout = IOCTL_TIMEOUT;
	52	cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
	53	cgc.cmd[8] = 12; /* LSB of length */
	54	cgc.buffer = buffer;
	55	cgc.buflen = 12;
	56	cgc.quiet = 1;
	57	cgc.data_direction = DMA_FROM_DEVICE;
	58
	59	result = sr_do_ioctl(cd, &cgc);
	60
	61	tochdr->cdth_trk0 = buffer[2];
	62	tochdr->cdth_trk1 = buffer[3];
	63
	64	kfree(buffer);
	65	return result;
	66	}
	67
	68	static int sr_read_tocentry(struct cdrom_device_info *cdi,
	69	struct cdrom_tocentry *tocentry)
	70	{
	71	struct scsi_cd *cd = cdi->handle;
	72	struct packet_command cgc;
	73	int result;
	74	unsigned char *buffer;
	75
24669f75	76	buffer = kzalloc(32, GFP_KERNEL \| SR_GFP_DMA(cd));
a09c6311 CH	77	if (!buffer)
	78	return -ENOMEM;
	79
a09c6311 CH	80	cgc.timeout = IOCTL_TIMEOUT;
	81	cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
	82	cgc.cmd[1] \|= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0;
	83	cgc.cmd[6] = tocentry->cdte_track;
	84	cgc.cmd[8] = 12; /* LSB of length */
	85	cgc.buffer = buffer;
	86	cgc.buflen = 12;
	87	cgc.data_direction = DMA_FROM_DEVICE;
	88
	89	result = sr_do_ioctl(cd, &cgc);
	90
	91	tocentry->cdte_ctrl = buffer[5] & 0xf;
	92	tocentry->cdte_adr = buffer[5] >> 4;
	93	tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
	94	if (tocentry->cdte_format == CDROM_MSF) {
	95	tocentry->cdte_addr.msf.minute = buffer[9];
	96	tocentry->cdte_addr.msf.second = buffer[10];
	97	tocentry->cdte_addr.msf.frame = buffer[11];
	98	} else
	99	tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
	100	+ buffer[10]) << 8) + buffer[11];
	101
	102	kfree(buffer);
	103	return result;
	104	}
1da177e4 LT	105
	106	#define IOCTL_RETRIES 3
	107
	108	/* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command. When these drives
	109	are emulating a SCSI device via the idescsi module, they need to have
	110	CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */
	111
	112	static int sr_fake_playtrkind(struct cdrom_device_info cdi, struct cdrom_ti ti)
	113	{
	114	struct cdrom_tocentry trk0_te, trk1_te;
	115	struct cdrom_tochdr tochdr;
	116	struct packet_command cgc;
	117	int ntracks, ret;
	118
a09c6311 CH	119	ret = sr_read_tochdr(cdi, &tochdr);
a09c6311 CH	120	if (ret)
1da177e4 LT	121	return ret;
	122
	123	ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
	124
	125	if (ti->cdti_trk1 == ntracks)
	126	ti->cdti_trk1 = CDROM_LEADOUT;
	127	else if (ti->cdti_trk1 != CDROM_LEADOUT)
	128	ti->cdti_trk1 ++;
	129
	130	trk0_te.cdte_track = ti->cdti_trk0;
	131	trk0_te.cdte_format = CDROM_MSF;
	132	trk1_te.cdte_track = ti->cdti_trk1;
	133	trk1_te.cdte_format = CDROM_MSF;
	134
a09c6311 CH	135	ret = sr_read_tocentry(cdi, &trk0_te);
a09c6311 CH	136	if (ret)
1da177e4	137	return ret;
a09c6311 CH	138	ret = sr_read_tocentry(cdi, &trk1_te);
a09c6311 CH	139	if (ret)
1da177e4 LT	140	return ret;
	141
	142	memset(&cgc, 0, sizeof(struct packet_command));
	143	cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
	144	cgc.cmd[3] = trk0_te.cdte_addr.msf.minute;
	145	cgc.cmd[4] = trk0_te.cdte_addr.msf.second;
	146	cgc.cmd[5] = trk0_te.cdte_addr.msf.frame;
	147	cgc.cmd[6] = trk1_te.cdte_addr.msf.minute;
	148	cgc.cmd[7] = trk1_te.cdte_addr.msf.second;
	149	cgc.cmd[8] = trk1_te.cdte_addr.msf.frame;
	150	cgc.data_direction = DMA_NONE;
	151	cgc.timeout = IOCTL_TIMEOUT;
	152	return sr_do_ioctl(cdi->handle, &cgc);
	153	}
	154
a09c6311 CH	155	static int sr_play_trkind(struct cdrom_device_info *cdi,
	156	struct cdrom_ti *ti)
	157
	158	{
	159	struct scsi_cd *cd = cdi->handle;
	160	struct packet_command cgc;
	161	int result;
	162
	163	memset(&cgc, 0, sizeof(struct packet_command));
	164	cgc.timeout = IOCTL_TIMEOUT;
	165	cgc.cmd[0] = GPCMD_PLAYAUDIO_TI;
	166	cgc.cmd[4] = ti->cdti_trk0;
	167	cgc.cmd[5] = ti->cdti_ind0;
	168	cgc.cmd[7] = ti->cdti_trk1;
	169	cgc.cmd[8] = ti->cdti_ind1;
	170	cgc.data_direction = DMA_NONE;
	171
	172	result = sr_do_ioctl(cd, &cgc);
	173	if (result == -EDRIVE_CANT_DO_THIS)
	174	result = sr_fake_playtrkind(cdi, ti);
	175
	176	return result;
	177	}
	178
1da177e4 LT	179	/* We do our own retries because we want to know what the specific
	180	error code is. Normally the UNIT_ATTENTION code will automatically
	181	clear after one error */
	182
	183	int sr_do_ioctl(Scsi_CD cd, struct packet_command cgc)
	184	{
1da177e4	185	struct scsi_device *SDev;
820732b5	186	struct scsi_sense_hdr sshdr;
1da177e4	187	int result, err = 0, retries = 0;
820732b5	188	struct request_sense *sense = cgc->sense;
1da177e4 LT	189
1da177e4 LT	190	SDev = cd->device;
820732b5 JB	191
	192	if (!sense) {
	193	sense = kmalloc(sizeof(*sense), GFP_KERNEL);
	194	if (!sense) {
	195	err = -ENOMEM;
	196	goto out;
	197	}
	198	}
1da177e4 LT	199
	200	retry:
	201	if (!scsi_block_when_processing_errors(SDev)) {
	202	err = -ENODEV;
820732b5	203	goto out;
1da177e4 LT	204	}
1da177e4 LT	205
820732b5 JB	206	memset(sense, 0, sizeof(*sense));
	207	result = scsi_execute(SDev, cgc->cmd, cgc->data_direction,
	208	cgc->buffer, cgc->buflen, (char *)sense,
	209	cgc->timeout, IOCTL_RETRIES, 0);
1da177e4	210
820732b5	211	scsi_normalize_sense((char )sense, sizeof(sense), &sshdr);
1da177e4 LT	212
	213	/* Minimal error checking. Ignore cases we know about, and report the rest. */
	214	if (driver_byte(result) != 0) {
820732b5	215	switch (sshdr.sense_key) {
1da177e4 LT	216	case UNIT_ATTENTION:
	217	SDev->changed = 1;
	218	if (!cgc->quiet)
	219	printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name);
	220	if (retries++ < 10)
	221	goto retry;
	222	err = -ENOMEDIUM;
	223	break;
	224	case NOT_READY: /* This happens if there is no disc in drive */
820732b5 JB	225	if (sshdr.asc == 0x04 &&
820732b5 JB	226	sshdr.ascq == 0x01) {
1da177e4 LT	227	/* sense: Logical unit is in process of becoming ready */
	228	if (!cgc->quiet)
	229	printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name);
	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)
	241	printk(KERN_INFO "%s: CDROM not ready. Make sure there is a disc in the drive.\n", cd->cdi.name);
	242	#ifdef DEBUG
820732b5	243	scsi_print_sense_hdr("sr", &sshdr);
1da177e4 LT	244	#endif
	245	err = -ENOMEDIUM;
	246	break;
	247	case ILLEGAL_REQUEST:
	248	err = -EIO;
820732b5 JB	249	if (sshdr.asc == 0x20 &&
820732b5 JB	250	sshdr.ascq == 0x00)
1da177e4 LT	251	/* sense: Invalid command operation code */
	252	err = -EDRIVE_CANT_DO_THIS;
	253	#ifdef DEBUG
	254	__scsi_print_command(cgc->cmd);
820732b5	255	scsi_print_sense_hdr("sr", &sshdr);
1da177e4 LT	256	#endif
	257	break;
	258	default:
	259	printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name);
	260	__scsi_print_command(cgc->cmd);
820732b5	261	scsi_print_sense_hdr("sr", &sshdr);
1da177e4 LT	262	err = -EIO;
	263	}
	264	}
	265
1da177e4	266	/* Wake up a process waiting for device */
1da177e4	267	out:
820732b5 JB	268	if (!cgc->sense)
820732b5 JB	269	kfree(sense);
1da177e4 LT	270	cgc->stat = err;
	271	return err;
	272	}
	273
	274	/* ---------------------------------------------------------------------- */
	275	/* interface to cdrom.c */
	276
	277	static int test_unit_ready(Scsi_CD *cd)
	278	{
	279	struct packet_command cgc;
	280
	281	memset(&cgc, 0, sizeof(struct packet_command));
	282	cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
	283	cgc.quiet = 1;
	284	cgc.data_direction = DMA_NONE;
	285	cgc.timeout = IOCTL_TIMEOUT;
	286	return sr_do_ioctl(cd, &cgc);
	287	}
	288
	289	int sr_tray_move(struct cdrom_device_info *cdi, int pos)
	290	{
	291	Scsi_CD *cd = cdi->handle;
	292	struct packet_command cgc;
	293
	294	memset(&cgc, 0, sizeof(struct packet_command));
	295	cgc.cmd[0] = GPCMD_START_STOP_UNIT;
	296	cgc.cmd[4] = (pos == 0) ? 0x03 /* close / : 0x02 / eject */ ;
	297	cgc.data_direction = DMA_NONE;
	298	cgc.timeout = IOCTL_TIMEOUT;
	299	return sr_do_ioctl(cd, &cgc);
	300	}
	301
	302	int sr_lock_door(struct cdrom_device_info *cdi, int lock)
	303	{
	304	Scsi_CD *cd = cdi->handle;
	305
	306	return scsi_set_medium_removal(cd->device, lock ?
	307	SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW);
	308	}
	309
	310	int sr_drive_status(struct cdrom_device_info *cdi, int slot)
	311	{
	312	if (CDSL_CURRENT != slot) {
	313	/* we have no changer support */
	314	return -EINVAL;
	315	}
	316	if (0 == test_unit_ready(cdi->handle))
	317	return CDS_DISC_OK;
	318
	319	return CDS_TRAY_OPEN;
	320	}
	321
	322	int sr_disk_status(struct cdrom_device_info *cdi)
	323	{
	324	Scsi_CD *cd = cdi->handle;
	325	struct cdrom_tochdr toc_h;
	326	struct cdrom_tocentry toc_e;
	327	int i, rc, have_datatracks = 0;
	328
	329	/* look for data tracks */
a09c6311 CH	330	rc = sr_read_tochdr(cdi, &toc_h);
a09c6311 CH	331	if (rc)
1da177e4 LT	332	return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
	333
	334	for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
	335	toc_e.cdte_track = i;
	336	toc_e.cdte_format = CDROM_LBA;
a09c6311	337	if (sr_read_tocentry(cdi, &toc_e))
1da177e4 LT	338	return CDS_NO_INFO;
	339	if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
	340	have_datatracks = 1;
	341	break;
	342	}
	343	}
	344	if (!have_datatracks)
	345	return CDS_AUDIO;
	346
	347	if (cd->xa_flag)
	348	return CDS_XA_2_1;
	349	else
	350	return CDS_DATA_1;
	351	}
	352
	353	int sr_get_last_session(struct cdrom_device_info *cdi,
	354	struct cdrom_multisession *ms_info)
	355	{
	356	Scsi_CD *cd = cdi->handle;
	357
	358	ms_info->addr.lba = cd->ms_offset;
	359	ms_info->xa_flag = cd->xa_flag \|\| cd->ms_offset > 0;
	360
	361	return 0;
	362	}
	363
1da177e4 LT	364	int sr_get_mcn(struct cdrom_device_info cdi, struct cdrom_mcn mcn)
	365	{
	366	Scsi_CD *cd = cdi->handle;
	367	struct packet_command cgc;
	368	char *buffer = kmalloc(32, GFP_KERNEL \| SR_GFP_DMA(cd));
	369	int result;
	370
3a73e8c7 ND	371	if (!buffer)
	372	return -ENOMEM;
	373
1da177e4 LT	374	memset(&cgc, 0, sizeof(struct packet_command));
	375	cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
	376	cgc.cmd[2] = 0x40; /* I do want the subchannel info */
	377	cgc.cmd[3] = 0x02; /* Give me medium catalog number info */
	378	cgc.cmd[8] = 24;
	379	cgc.buffer = buffer;
	380	cgc.buflen = 24;
	381	cgc.data_direction = DMA_FROM_DEVICE;
	382	cgc.timeout = IOCTL_TIMEOUT;
	383	result = sr_do_ioctl(cd, &cgc);
	384
	385	memcpy(mcn->medium_catalog_number, buffer + 9, 13);
	386	mcn->medium_catalog_number[13] = 0;
	387
	388	kfree(buffer);
	389	return result;
	390	}
	391
	392	int sr_reset(struct cdrom_device_info *cdi)
	393	{
	394	return 0;
	395	}
	396
	397	int sr_select_speed(struct cdrom_device_info *cdi, int speed)
	398	{
	399	Scsi_CD *cd = cdi->handle;
	400	struct packet_command cgc;
	401
	402	if (speed == 0)
	403	speed = 0xffff; /* set to max */
	404	else
	405	speed = 177; / Nx to kbyte/s */
	406
	407	memset(&cgc, 0, sizeof(struct packet_command));
	408	cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */
	409	cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */
	410	cgc.cmd[3] = speed & 0xff; /* LSB */
	411	cgc.data_direction = DMA_NONE;
	412	cgc.timeout = IOCTL_TIMEOUT;
	413
	414	if (sr_do_ioctl(cd, &cgc))
	415	return -EIO;
	416	return 0;
	417	}
	418
	419	/* ----------------------------------------------------------------------- */
	420	/* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */
	421	/* because the generic cdrom driver does the user access stuff for us. */
	422	/* only cdromreadtochdr and cdromreadtocentry are left - for use with the */
	423	/* sr_disk_status interface for the generic cdrom driver. */
	424
	425	int sr_audio_ioctl(struct cdrom_device_info cdi, unsigned int cmd, void arg)
	426	{
1da177e4 LT	427	switch (cmd) {
1da177e4 LT	428	case CDROMREADTOCHDR:
a09c6311	429	return sr_read_tochdr(cdi, arg);
1da177e4	430	case CDROMREADTOCENTRY:
a09c6311 CH	431	return sr_read_tocentry(cdi, arg);
	432	case CDROMPLAYTRKIND:
	433	return sr_play_trkind(cdi, arg);
1da177e4	434	default:
a09c6311	435	return -EINVAL;
1da177e4	436	}
1da177e4 LT	437	}
	438
	439	/* -----------------------------------------------------------------------
	440	* a function to read all sorts of funny cdrom sectors using the READ_CD
	441	* scsi-3 mmc command
	442	*
	443	* lba: linear block address
	444	* format: 0 = data (anything)
	445	* 1 = audio
	446	* 2 = data (mode 1)
	447	* 3 = data (mode 2)
	448	* 4 = data (mode 2 form1)
	449	* 5 = data (mode 2 form2)
	450	* blksize: 2048 \| 2336 \| 2340 \| 2352
	451	*/
	452
	453	static int sr_read_cd(Scsi_CD cd, unsigned char dest, int lba, int format, int blksize)
	454	{
	455	struct packet_command cgc;
	456
	457	#ifdef DEBUG
	458	printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n",
	459	cd->cdi.name, lba, format, blksize);
	460	#endif
	461
	462	memset(&cgc, 0, sizeof(struct packet_command));
	463	cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */
	464	cgc.cmd[1] = ((format & 7) << 2);
	465	cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
	466	cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
	467	cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
	468	cgc.cmd[5] = (unsigned char) lba & 0xff;
	469	cgc.cmd[8] = 1;
	470	switch (blksize) {
	471	case 2336:
	472	cgc.cmd[9] = 0x58;
	473	break;
	474	case 2340:
	475	cgc.cmd[9] = 0x78;
	476	break;
	477	case 2352:
	478	cgc.cmd[9] = 0xf8;
	479	break;
	480	default:
	481	cgc.cmd[9] = 0x10;
	482	break;
	483	}
	484	cgc.buffer = dest;
	485	cgc.buflen = blksize;
	486	cgc.data_direction = DMA_FROM_DEVICE;
	487	cgc.timeout = IOCTL_TIMEOUT;
	488	return sr_do_ioctl(cd, &cgc);
	489	}
	490
	491	/*
	492	* read sectors with blocksizes other than 2048
	493	*/
	494
	495	static int sr_read_sector(Scsi_CD cd, int lba, int blksize, unsigned char dest)
	496	{
	497	struct packet_command cgc;
	498	int rc;
	499
	500	/* we try the READ CD command first... */
501	if (cd->readcd_known) {
502	rc = sr_read_cd(cd, dest, lba, 0, blksize);
503	if (-EDRIVE_CANT_DO_THIS != rc)
504	return rc;
505	cd->readcd_known = 0;
506	printk("CDROM does'nt support READ CD (0xbe) command\n");
507	/* fall & retry the other way */
508	}
509	/* ... if this fails, we switch the blocksize using MODE SELECT */
510	if (blksize != cd->device->sector_size) {
511	if (0 != (rc = sr_set_blocklength(cd, blksize)))
512	return rc;
513	}
514	#ifdef DEBUG
515	printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize);
516	#endif
517
518	memset(&cgc, 0, sizeof(struct packet_command));
519	cgc.cmd[0] = GPCMD_READ_10;
520	cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
521	cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
522	cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
523	cgc.cmd[5] = (unsigned char) lba & 0xff;
524	cgc.cmd[8] = 1;
525	cgc.buffer = dest;
526	cgc.buflen = blksize;
527	cgc.data_direction = DMA_FROM_DEVICE;
528	cgc.timeout = IOCTL_TIMEOUT;
529	rc = sr_do_ioctl(cd, &cgc);
530
531	return rc;
532	}
533
534	/*
535	* read a sector in raw mode to check the sector format
536	* ret: 1 == mode2 (XA), 0 == mode1, <0 == error
537	*/
538
539	int sr_is_xa(Scsi_CD *cd)
540	{
541	unsigned char *raw_sector;
542	int is_xa;
543
544	if (!xa_test)
545	return 0;
546
547	raw_sector = (unsigned char *) kmalloc(2048, GFP_KERNEL \| SR_GFP_DMA(cd));
548	if (!raw_sector)
549	return -ENOMEM;
550	if (0 == sr_read_sector(cd, cd->ms_offset + 16,
551	CD_FRAMESIZE_RAW1, raw_sector)) {
552	is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
553	} else {
554	/* read a raw sector failed for some reason. */
555	is_xa = -1;
556	}
557	kfree(raw_sector);
558	#ifdef DEBUG
559	printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa);
560	#endif
561	return is_xa;
562	}
563
564	int sr_dev_ioctl(struct cdrom_device_info *cdi,
565	unsigned int cmd, unsigned long arg)
566	{
567	Scsi_CD *cd = cdi->handle;
568	int ret;
569
570	ret = scsi_nonblockable_ioctl(cd->device, cmd,
571	(void __user *)arg, NULL);
572	/*
573	* ENODEV means that we didn't recognise the ioctl, or that we
574	* cannot execute it in the current device state. In either
575	* case fall through to scsi_ioctl, which will return ENDOEV again
576	* if it doesn't recognise the ioctl
577	*/
578	if (ret != -ENODEV)
579	return ret;
580	return scsi_ioctl(cd->device, cmd, (void __user *)arg);
581	}