--- /dev/null
+#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)
+ sr_printk(KERN_INFO, cd,
+ "disc change detected.\n");
+ if (retries++ < 10)
+ goto retry;
+ err = -ENOMEDIUM;
+ break;
+ case NOT_READY: /* This happens if there is no disc in drive */
+ if (sshdr.asc == 0x04 &&
+ sshdr.ascq == 0x01) {
+ /* sense: Logical unit is in process of becoming ready */
+ if (!cgc->quiet)
+ sr_printk(KERN_INFO, cd,
+ "CDROM not ready yet.\n");
+ if (retries++ < 10) {
+ /* sleep 2 sec and try again */
+ ssleep(2);
+ goto retry;
+ } else {
+ /* 20 secs are enough? */
+ err = -ENOMEDIUM;
+ break;
+ }
+ }
+ if (!cgc->quiet)
+ sr_printk(KERN_INFO, cd,
+ "CDROM not ready. Make sure there "
+ "is a disc in the drive.\n");
+ err = -ENOMEDIUM;
+ break;
+ case ILLEGAL_REQUEST:
+ err = -EIO;
+ if (sshdr.asc == 0x20 &&
+ sshdr.ascq == 0x00)
+ /* sense: Invalid command operation code */
+ err = -EDRIVE_CANT_DO_THIS;
+ break;
+ default:
+ err = -EIO;
+ }
+ }
+
+ /* Wake up a process waiting for device */
+ out:
+ 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
+ sr_printk(KERN_INFO, cd, "sr_read_cd lba=%d format=%d blksize=%d\n",
+ lba, format, blksize);
+#endif
+
+ memset(&cgc, 0, sizeof(struct packet_command));
+ cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */
+ cgc.cmd[1] = ((format & 7) << 2);
+ cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
+ cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
+ cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
+ cgc.cmd[5] = (unsigned char) lba & 0xff;
+ cgc.cmd[8] = 1;
+ switch (blksize) {
+ case 2336:
+ cgc.cmd[9] = 0x58;
+ break;
+ case 2340:
+ cgc.cmd[9] = 0x78;
+ break;
+ case 2352:
+ cgc.cmd[9] = 0xf8;
+ break;
+ default:
+ cgc.cmd[9] = 0x10;
+ break;
+ }
+ cgc.buffer = dest;
+ cgc.buflen = blksize;
+ cgc.data_direction = DMA_FROM_DEVICE;
+ cgc.timeout = IOCTL_TIMEOUT;
+ return sr_do_ioctl(cd, &cgc);
+}
+
+/*
+ * read sectors with blocksizes other than 2048
+ */
+
+static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest)
+{
+ struct packet_command cgc;
+ int rc;
+
+ /* we try the READ CD command first... */
+ if (cd->readcd_known) {
+ rc = sr_read_cd(cd, dest, lba, 0, blksize);
+ if (-EDRIVE_CANT_DO_THIS != rc)
+ return rc;
+ cd->readcd_known = 0;
+ sr_printk(KERN_INFO, cd,
+ "CDROM does'nt support READ CD (0xbe) command\n");
+ /* fall & retry the other way */
+ }
+ /* ... if this fails, we switch the blocksize using MODE SELECT */
+ if (blksize != cd->device->sector_size) {
+ if (0 != (rc = sr_set_blocklength(cd, blksize)))
+ return rc;
+ }
+#ifdef DEBUG
+ sr_printk(KERN_INFO, cd, "sr_read_sector lba=%d blksize=%d\n",
+ lba, blksize);
+#endif
+
+ memset(&cgc, 0, sizeof(struct packet_command));
+ cgc.cmd[0] = GPCMD_READ_10;
+ cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
+ cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
+ cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
+ cgc.cmd[5] = (unsigned char) lba & 0xff;
+ cgc.cmd[8] = 1;
+ cgc.buffer = dest;
+ cgc.buflen = blksize;
+ cgc.data_direction = DMA_FROM_DEVICE;
+ cgc.timeout = IOCTL_TIMEOUT;
+ rc = sr_do_ioctl(cd, &cgc);
+
+ return rc;
+}
+
+/*
+ * read a sector in raw mode to check the sector format
+ * ret: 1 == mode2 (XA), 0 == mode1, <0 == error
+ */
+
+int sr_is_xa(Scsi_CD *cd)
+{
+ unsigned char *raw_sector;
+ int is_xa;
+
+ if (!xa_test)
+ return 0;
+
+ raw_sector = kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd));
+ if (!raw_sector)
+ return -ENOMEM;
+ if (0 == sr_read_sector(cd, cd->ms_offset + 16,
+ CD_FRAMESIZE_RAW1, raw_sector)) {
+ is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
+ } else {
+ /* read a raw sector failed for some reason. */
+ is_xa = -1;
+ }
+ kfree(raw_sector);
+#ifdef DEBUG
+ sr_printk(KERN_INFO, cd, "sr_is_xa: %d\n", is_xa);
+#endif
+ return is_xa;
+}
Code Review / kvmfornfv.git / blobdiff