[deliverable/linux.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 = 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);

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