[GitHub/mt8127/android_kernel_alcatel_ttab.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/module.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 (!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
	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>
acf3368f	7	#include <linux/module.h>
1da177e4 LT	8	#include <linux/blkpg.h>
	9	#include <linux/cdrom.h>
	10	#include <linux/delay.h>
5a0e3ad6	11	#include <linux/slab.h>
1da177e4 LT	12	#include <asm/io.h>
	13	#include <asm/uaccess.h>
	14
	15	#include <scsi/scsi.h>
	16	#include <scsi/scsi_dbg.h>
	17	#include <scsi/scsi_device.h>
	18	#include <scsi/scsi_eh.h>
	19	#include <scsi/scsi_host.h>
	20	#include <scsi/scsi_ioctl.h>
820732b5	21	#include <scsi/scsi_cmnd.h>
1da177e4 LT	22
	23	#include "sr.h"
	24
	25	#if 0
	26	#define DEBUG
	27	#endif
	28
	29	/* The sr_is_xa() seems to trigger firmware bugs with some drives :-(
	30	* It is off by default and can be turned on with this module parameter */
	31	static int xa_test = 0;
	32
	33	module_param(xa_test, int, S_IRUGO \| S_IWUSR);
	34
a09c6311 CH	35	/* primitive to determine whether we need to have GFP_DMA set based on
	36	* the status of the unchecked_isa_dma flag in the host structure */
	37	#define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0)
	38
	39
	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;
820732b5	191	struct request_sense *sense = cgc->sense;
1da177e4 LT	192
1da177e4 LT	193	SDev = cd->device;
820732b5 JB	194
820732b5 JB	195	if (!sense) {
f716d830	196	sense = kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL);
820732b5 JB	197	if (!sense) {
	198	err = -ENOMEM;
	199	goto out;
	200	}
	201	}
1da177e4 LT	202
	203	retry:
	204	if (!scsi_block_when_processing_errors(SDev)) {
	205	err = -ENODEV;
820732b5	206	goto out;
1da177e4 LT	207	}
1da177e4 LT	208
820732b5 JB	209	memset(sense, 0, sizeof(*sense));
	210	result = scsi_execute(SDev, cgc->cmd, cgc->data_direction,
	211	cgc->buffer, cgc->buflen, (char *)sense,
f4f4e47e	212	cgc->timeout, IOCTL_RETRIES, 0, NULL);
1da177e4	213
820732b5	214	scsi_normalize_sense((char )sense, sizeof(sense), &sshdr);
1da177e4 LT	215
	216	/* Minimal error checking. Ignore cases we know about, and report the rest. */
	217	if (driver_byte(result) != 0) {
820732b5	218	switch (sshdr.sense_key) {
1da177e4 LT	219	case UNIT_ATTENTION:
	220	SDev->changed = 1;
	221	if (!cgc->quiet)
	222	printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name);
	223	if (retries++ < 10)
	224	goto retry;
	225	err = -ENOMEDIUM;
	226	break;
	227	case NOT_READY: /* This happens if there is no disc in drive */
820732b5 JB	228	if (sshdr.asc == 0x04 &&
820732b5 JB	229	sshdr.ascq == 0x01) {
1da177e4 LT	230	/* sense: Logical unit is in process of becoming ready */
	231	if (!cgc->quiet)
	232	printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name);
	233	if (retries++ < 10) {
	234	/* sleep 2 sec and try again */
	235	ssleep(2);
	236	goto retry;
	237	} else {
	238	/* 20 secs are enough? */
	239	err = -ENOMEDIUM;
	240	break;
	241	}
	242	}
	243	if (!cgc->quiet)
	244	printk(KERN_INFO "%s: CDROM not ready. Make sure there is a disc in the drive.\n", cd->cdi.name);
	245	#ifdef DEBUG
820732b5	246	scsi_print_sense_hdr("sr", &sshdr);
1da177e4 LT	247	#endif
	248	err = -ENOMEDIUM;
	249	break;
	250	case ILLEGAL_REQUEST:
	251	err = -EIO;
820732b5 JB	252	if (sshdr.asc == 0x20 &&
820732b5 JB	253	sshdr.ascq == 0x00)
1da177e4 LT	254	/* sense: Invalid command operation code */
	255	err = -EDRIVE_CANT_DO_THIS;
	256	#ifdef DEBUG
	257	__scsi_print_command(cgc->cmd);
820732b5	258	scsi_print_sense_hdr("sr", &sshdr);
1da177e4 LT	259	#endif
	260	break;
	261	default:
	262	printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name);
	263	__scsi_print_command(cgc->cmd);
820732b5	264	scsi_print_sense_hdr("sr", &sshdr);
1da177e4 LT	265	err = -EIO;
	266	}
	267	}
	268
1da177e4	269	/* Wake up a process waiting for device */
1da177e4	270	out:
820732b5 JB	271	if (!cgc->sense)
820732b5 JB	272	kfree(sense);
1da177e4 LT	273	cgc->stat = err;
	274	return err;
	275	}
	276
	277	/* ---------------------------------------------------------------------- */
	278	/* interface to cdrom.c */
	279
1da177e4 LT	280	int sr_tray_move(struct cdrom_device_info *cdi, int pos)
	281	{
	282	Scsi_CD *cd = cdi->handle;
	283	struct packet_command cgc;
	284
	285	memset(&cgc, 0, sizeof(struct packet_command));
	286	cgc.cmd[0] = GPCMD_START_STOP_UNIT;
	287	cgc.cmd[4] = (pos == 0) ? 0x03 /* close / : 0x02 / eject */ ;
	288	cgc.data_direction = DMA_NONE;
	289	cgc.timeout = IOCTL_TIMEOUT;
	290	return sr_do_ioctl(cd, &cgc);
	291	}
	292
	293	int sr_lock_door(struct cdrom_device_info *cdi, int lock)
	294	{
	295	Scsi_CD *cd = cdi->handle;
	296
	297	return scsi_set_medium_removal(cd->device, lock ?
	298	SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW);
	299	}
	300
	301	int sr_drive_status(struct cdrom_device_info *cdi, int slot)
	302	{
210ba1d1 JB	303	struct scsi_cd *cd = cdi->handle;
	304	struct scsi_sense_hdr sshdr;
	305	struct media_event_desc med;
	306
1da177e4 LT	307	if (CDSL_CURRENT != slot) {
	308	/* we have no changer support */
	309	return -EINVAL;
	310	}
9f8a2c23	311	if (!scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr))
1da177e4 LT	312	return CDS_DISC_OK;
1da177e4 LT	313
96bcc722 PJ	314	/* SK/ASC/ASCQ of 2/4/1 means "unit is becoming ready" */
	315	if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY
	316	&& sshdr.asc == 0x04 && sshdr.ascq == 0x01)
	317	return CDS_DRIVE_NOT_READY;
	318
210ba1d1 JB	319	if (!cdrom_get_media_event(cdi, &med)) {
	320	if (med.media_present)
	321	return CDS_DISC_OK;
	322	else if (med.door_open)
	323	return CDS_TRAY_OPEN;
	324	else
	325	return CDS_NO_DISC;
	326	}
	327
b8479178 RJ	328	/*
	329	* SK/ASC/ASCQ of 2/4/2 means "initialization required"
	330	* Using CD_TRAY_OPEN results in an START_STOP_UNIT to close
	331	* the tray, which resolves the initialization requirement.
	332	*/
	333	if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY
	334	&& sshdr.asc == 0x04 && sshdr.ascq == 0x02)
	335	return CDS_TRAY_OPEN;
	336
210ba1d1 JB	337	/*
	338	* 0x04 is format in progress .. but there must be a disc present!
	339	*/
	340	if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04)
	341	return CDS_DISC_OK;
	342
	343	/*
	344	* If not using Mt Fuji extended media tray reports,
	345	* just return TRAY_OPEN since ATAPI doesn't provide
	346	* any other way to detect this...
	347	*/
	348	if (scsi_sense_valid(&sshdr) &&
	349	/* 0x3a is medium not present */
	350	sshdr.asc == 0x3a)
	351	return CDS_NO_DISC;
	352	else
	353	return CDS_TRAY_OPEN;
	354
	355	return CDS_DRIVE_NOT_READY;
1da177e4 LT	356	}
	357
	358	int sr_disk_status(struct cdrom_device_info *cdi)
	359	{
	360	Scsi_CD *cd = cdi->handle;
	361	struct cdrom_tochdr toc_h;
	362	struct cdrom_tocentry toc_e;
	363	int i, rc, have_datatracks = 0;
	364
	365	/* look for data tracks */
a09c6311 CH	366	rc = sr_read_tochdr(cdi, &toc_h);
a09c6311 CH	367	if (rc)
1da177e4 LT	368	return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
	369
	370	for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
	371	toc_e.cdte_track = i;
	372	toc_e.cdte_format = CDROM_LBA;
a09c6311	373	if (sr_read_tocentry(cdi, &toc_e))
1da177e4 LT	374	return CDS_NO_INFO;
	375	if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
	376	have_datatracks = 1;
	377	break;
	378	}
	379	}
	380	if (!have_datatracks)
	381	return CDS_AUDIO;
	382
	383	if (cd->xa_flag)
	384	return CDS_XA_2_1;
	385	else
	386	return CDS_DATA_1;
	387	}
	388
	389	int sr_get_last_session(struct cdrom_device_info *cdi,
	390	struct cdrom_multisession *ms_info)
	391	{
	392	Scsi_CD *cd = cdi->handle;
	393
	394	ms_info->addr.lba = cd->ms_offset;
	395	ms_info->xa_flag = cd->xa_flag \|\| cd->ms_offset > 0;
	396
	397	return 0;
	398	}
	399
1da177e4 LT	400	int sr_get_mcn(struct cdrom_device_info cdi, struct cdrom_mcn mcn)
	401	{
	402	Scsi_CD *cd = cdi->handle;
	403	struct packet_command cgc;
	404	char *buffer = kmalloc(32, GFP_KERNEL \| SR_GFP_DMA(cd));
	405	int result;
	406
3a73e8c7 ND	407	if (!buffer)
	408	return -ENOMEM;
	409
1da177e4 LT	410	memset(&cgc, 0, sizeof(struct packet_command));
	411	cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
	412	cgc.cmd[2] = 0x40; /* I do want the subchannel info */
	413	cgc.cmd[3] = 0x02; /* Give me medium catalog number info */
	414	cgc.cmd[8] = 24;
	415	cgc.buffer = buffer;
	416	cgc.buflen = 24;
	417	cgc.data_direction = DMA_FROM_DEVICE;
	418	cgc.timeout = IOCTL_TIMEOUT;
	419	result = sr_do_ioctl(cd, &cgc);
	420
	421	memcpy(mcn->medium_catalog_number, buffer + 9, 13);
	422	mcn->medium_catalog_number[13] = 0;
	423
	424	kfree(buffer);
	425	return result;
	426	}
	427
	428	int sr_reset(struct cdrom_device_info *cdi)
	429	{
	430	return 0;
	431	}
	432
	433	int sr_select_speed(struct cdrom_device_info *cdi, int speed)
	434	{
	435	Scsi_CD *cd = cdi->handle;
	436	struct packet_command cgc;
	437
	438	if (speed == 0)
	439	speed = 0xffff; /* set to max */
	440	else
	441	speed = 177; / Nx to kbyte/s */
	442
	443	memset(&cgc, 0, sizeof(struct packet_command));
	444	cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */
	445	cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */
	446	cgc.cmd[3] = speed & 0xff; /* LSB */
	447	cgc.data_direction = DMA_NONE;
	448	cgc.timeout = IOCTL_TIMEOUT;
	449
	450	if (sr_do_ioctl(cd, &cgc))
	451	return -EIO;
	452	return 0;
	453	}
	454
	455	/* ----------------------------------------------------------------------- */
	456	/* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */
	457	/* because the generic cdrom driver does the user access stuff for us. */
	458	/* only cdromreadtochdr and cdromreadtocentry are left - for use with the */
	459	/* sr_disk_status interface for the generic cdrom driver. */
	460
	461	int sr_audio_ioctl(struct cdrom_device_info cdi, unsigned int cmd, void arg)
	462	{
1da177e4 LT	463	switch (cmd) {
1da177e4 LT	464	case CDROMREADTOCHDR:
a09c6311	465	return sr_read_tochdr(cdi, arg);
1da177e4	466	case CDROMREADTOCENTRY:
a09c6311 CH	467	return sr_read_tocentry(cdi, arg);
	468	case CDROMPLAYTRKIND:
	469	return sr_play_trkind(cdi, arg);
1da177e4	470	default:
a09c6311	471	return -EINVAL;
1da177e4	472	}
1da177e4 LT	473	}
	474
	475	/* -----------------------------------------------------------------------
	476	* a function to read all sorts of funny cdrom sectors using the READ_CD
	477	* scsi-3 mmc command
	478	*
	479	* lba: linear block address
	480	* format: 0 = data (anything)
	481	* 1 = audio
	482	* 2 = data (mode 1)
	483	* 3 = data (mode 2)
	484	* 4 = data (mode 2 form1)
	485	* 5 = data (mode 2 form2)
	486	* blksize: 2048 \| 2336 \| 2340 \| 2352
	487	*/
	488
	489	static int sr_read_cd(Scsi_CD cd, unsigned char dest, int lba, int format, int blksize)
	490	{
	491	struct packet_command cgc;
	492
	493	#ifdef DEBUG
	494	printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n",
	495	cd->cdi.name, lba, format, blksize);
	496	#endif
	497
	498	memset(&cgc, 0, sizeof(struct packet_command));
	499	cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */
	500	cgc.cmd[1] = ((format & 7) << 2);
	501	cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
	502	cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
	503	cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
	504	cgc.cmd[5] = (unsigned char) lba & 0xff;
	505	cgc.cmd[8] = 1;
	506	switch (blksize) {
	507	case 2336:
	508	cgc.cmd[9] = 0x58;
	509	break;
	510	case 2340:
	511	cgc.cmd[9] = 0x78;
	512	break;
	513	case 2352:
	514	cgc.cmd[9] = 0xf8;
	515	break;
	516	default:
	517	cgc.cmd[9] = 0x10;
	518	break;
	519	}
	520	cgc.buffer = dest;
	521	cgc.buflen = blksize;
	522	cgc.data_direction = DMA_FROM_DEVICE;
	523	cgc.timeout = IOCTL_TIMEOUT;
	524	return sr_do_ioctl(cd, &cgc);
	525	}
	526
	527	/*
	528	* read sectors with blocksizes other than 2048
	529	*/
	530
	531	static int sr_read_sector(Scsi_CD cd, int lba, int blksize, unsigned char dest)
	532	{
	533	struct packet_command cgc;
	534	int rc;
	535
	536	/* we try the READ CD command first... */
537	if (cd->readcd_known) {
538	rc = sr_read_cd(cd, dest, lba, 0, blksize);
539	if (-EDRIVE_CANT_DO_THIS != rc)
540	return rc;
541	cd->readcd_known = 0;
542	printk("CDROM does'nt support READ CD (0xbe) command\n");
543	/* fall & retry the other way */
544	}
545	/* ... if this fails, we switch the blocksize using MODE SELECT */
546	if (blksize != cd->device->sector_size) {
547	if (0 != (rc = sr_set_blocklength(cd, blksize)))
548	return rc;
549	}
550	#ifdef DEBUG
551	printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize);
552	#endif
553
554	memset(&cgc, 0, sizeof(struct packet_command));
555	cgc.cmd[0] = GPCMD_READ_10;
556	cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
557	cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
558	cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
559	cgc.cmd[5] = (unsigned char) lba & 0xff;
560	cgc.cmd[8] = 1;
561	cgc.buffer = dest;
562	cgc.buflen = blksize;
563	cgc.data_direction = DMA_FROM_DEVICE;
564	cgc.timeout = IOCTL_TIMEOUT;
565	rc = sr_do_ioctl(cd, &cgc);
566
567	return rc;
568	}
569
570	/*
571	* read a sector in raw mode to check the sector format
572	* ret: 1 == mode2 (XA), 0 == mode1, <0 == error
573	*/
574
575	int sr_is_xa(Scsi_CD *cd)
576	{
577	unsigned char *raw_sector;
578	int is_xa;
579
580	if (!xa_test)
581	return 0;
582
5cbded58	583	raw_sector = kmalloc(2048, GFP_KERNEL \| SR_GFP_DMA(cd));
1da177e4 LT	584	if (!raw_sector)
	585	return -ENOMEM;
	586	if (0 == sr_read_sector(cd, cd->ms_offset + 16,
	587	CD_FRAMESIZE_RAW1, raw_sector)) {
	588	is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
	589	} else {
	590	/* read a raw sector failed for some reason. */
	591	is_xa = -1;
	592	}
	593	kfree(raw_sector);
	594	#ifdef DEBUG
	595	printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa);
	596	#endif
	597	return is_xa;
	598	}