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-rw-r--r--drivers/scsi/sr_vendor.c340
1 files changed, 340 insertions, 0 deletions
diff --git a/drivers/scsi/sr_vendor.c b/drivers/scsi/sr_vendor.c
new file mode 100644
index 0000000000..a61635326a
--- /dev/null
+++ b/drivers/scsi/sr_vendor.c
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+// SPDX-License-Identifier: GPL-2.0
+/* -*-linux-c-*-
+
+ * vendor-specific code for SCSI CD-ROM's goes here.
+ *
+ * This is needed becauce most of the new features (multisession and
+ * the like) are too new to be included into the SCSI-II standard (to
+ * be exact: there is'nt anything in my draft copy).
+ *
+ * Aug 1997: Ha! Got a SCSI-3 cdrom spec across my fingers. SCSI-3 does
+ * multisession using the READ TOC command (like SONY).
+ *
+ * Rearranged stuff here: SCSI-3 is included allways, support
+ * for NEC/TOSHIBA/HP commands is optional.
+ *
+ * Gerd Knorr <kraxel@cs.tu-berlin.de>
+ *
+ * --------------------------------------------------------------------------
+ *
+ * support for XA/multisession-CD's
+ *
+ * - NEC: Detection and support of multisession CD's.
+ *
+ * - TOSHIBA: Detection and support of multisession CD's.
+ * Some XA-Sector tweaking, required for older drives.
+ *
+ * - SONY: Detection and support of multisession CD's.
+ * added by Thomas Quinot <thomas@cuivre.freenix.fr>
+ *
+ * - PIONEER, HITACHI, PLEXTOR, MATSHITA, TEAC, PHILIPS: known to
+ * work with SONY (SCSI3 now) code.
+ *
+ * - HP: Much like SONY, but a little different... (Thomas)
+ * HP-Writers only ??? Maybe other CD-Writers work with this too ?
+ * HP 6020 writers now supported.
+ */
+
+#include <linux/cdrom.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/bcd.h>
+#include <linux/blkdev.h>
+#include <linux/slab.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_ioctl.h>
+
+#include "sr.h"
+
+#if 0
+#define DEBUG
+#endif
+
+/* here are some constants to sort the vendors into groups */
+
+#define VENDOR_SCSI3 1 /* default: scsi-3 mmc */
+
+#define VENDOR_NEC 2
+#define VENDOR_TOSHIBA 3
+#define VENDOR_WRITER 4 /* pre-scsi3 writers */
+#define VENDOR_CYGNAL_85ED 5 /* CD-on-a-chip */
+
+#define VENDOR_TIMEOUT 30*HZ
+
+void sr_vendor_init(Scsi_CD *cd)
+{
+ const char *vendor = cd->device->vendor;
+ const char *model = cd->device->model;
+
+ /* default */
+ cd->vendor = VENDOR_SCSI3;
+ if (cd->readcd_known)
+ /* this is true for scsi3/mmc drives - no more checks */
+ return;
+
+ if (cd->device->type == TYPE_WORM) {
+ cd->vendor = VENDOR_WRITER;
+
+ } else if (!strncmp(vendor, "NEC", 3)) {
+ cd->vendor = VENDOR_NEC;
+ if (!strncmp(model, "CD-ROM DRIVE:25", 15) ||
+ !strncmp(model, "CD-ROM DRIVE:36", 15) ||
+ !strncmp(model, "CD-ROM DRIVE:83", 15) ||
+ !strncmp(model, "CD-ROM DRIVE:84 ", 16)
+#if 0
+ /* my NEC 3x returns the read-raw data if a read-raw
+ is followed by a read for the same sector - aeb */
+ || !strncmp(model, "CD-ROM DRIVE:500", 16)
+#endif
+ )
+ /* these can't handle multisession, may hang */
+ cd->cdi.mask |= CDC_MULTI_SESSION;
+
+ } else if (!strncmp(vendor, "TOSHIBA", 7)) {
+ cd->vendor = VENDOR_TOSHIBA;
+
+ } else if (!strncmp(vendor, "Beurer", 6) &&
+ !strncmp(model, "Gluco Memory", 12)) {
+ /* The Beurer GL50 evo uses a Cygnal-manufactured CD-on-a-chip
+ that only accepts a subset of SCSI commands. Most of the
+ not-implemented commands are fine to fail, but a few,
+ particularly around the MMC or Audio commands, will put the
+ device into an unrecoverable state, so they need to be
+ avoided at all costs.
+ */
+ cd->vendor = VENDOR_CYGNAL_85ED;
+ cd->cdi.mask |= (
+ CDC_MULTI_SESSION |
+ CDC_CLOSE_TRAY | CDC_OPEN_TRAY |
+ CDC_LOCK |
+ CDC_GENERIC_PACKET |
+ CDC_PLAY_AUDIO
+ );
+ }
+}
+
+
+/* small handy function for switching block length using MODE SELECT,
+ * used by sr_read_sector() */
+
+int sr_set_blocklength(Scsi_CD *cd, int blocklength)
+{
+ unsigned char *buffer; /* the buffer for the ioctl */
+ struct packet_command cgc;
+ struct ccs_modesel_head *modesel;
+ int rc, density = 0;
+
+ if (cd->vendor == VENDOR_TOSHIBA)
+ density = (blocklength > 2048) ? 0x81 : 0x83;
+
+ buffer = kmalloc(512, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+#ifdef DEBUG
+ sr_printk(KERN_INFO, cd, "MODE SELECT 0x%x/%d\n", density, blocklength);
+#endif
+ memset(&cgc, 0, sizeof(struct packet_command));
+ cgc.cmd[0] = MODE_SELECT;
+ cgc.cmd[1] = (1 << 4);
+ cgc.cmd[4] = 12;
+ modesel = (struct ccs_modesel_head *) buffer;
+ memset(modesel, 0, sizeof(*modesel));
+ modesel->block_desc_length = 0x08;
+ modesel->density = density;
+ modesel->block_length_med = (blocklength >> 8) & 0xff;
+ modesel->block_length_lo = blocklength & 0xff;
+ cgc.buffer = buffer;
+ cgc.buflen = sizeof(*modesel);
+ cgc.data_direction = DMA_TO_DEVICE;
+ cgc.timeout = VENDOR_TIMEOUT;
+ if (0 == (rc = sr_do_ioctl(cd, &cgc))) {
+ cd->device->sector_size = blocklength;
+ }
+#ifdef DEBUG
+ else
+ sr_printk(KERN_INFO, cd,
+ "switching blocklength to %d bytes failed\n",
+ blocklength);
+#endif
+ kfree(buffer);
+ return rc;
+}
+
+/* This function gets called after a media change. Checks if the CD is
+ multisession, asks for offset etc. */
+
+int sr_cd_check(struct cdrom_device_info *cdi)
+{
+ Scsi_CD *cd = cdi->handle;
+ unsigned long sector;
+ unsigned char *buffer; /* the buffer for the ioctl */
+ struct packet_command cgc;
+ int rc, no_multi;
+
+ if (cd->cdi.mask & CDC_MULTI_SESSION)
+ return 0;
+
+ buffer = kmalloc(512, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ sector = 0; /* the multisession sector offset goes here */
+ no_multi = 0; /* flag: the drive can't handle multisession */
+ rc = 0;
+
+ memset(&cgc, 0, sizeof(struct packet_command));
+
+ switch (cd->vendor) {
+
+ case VENDOR_SCSI3:
+ cgc.cmd[0] = READ_TOC;
+ cgc.cmd[8] = 12;
+ cgc.cmd[9] = 0x40;
+ cgc.buffer = buffer;
+ cgc.buflen = 12;
+ cgc.quiet = 1;
+ cgc.data_direction = DMA_FROM_DEVICE;
+ cgc.timeout = VENDOR_TIMEOUT;
+ rc = sr_do_ioctl(cd, &cgc);
+ if (rc != 0)
+ break;
+ if ((buffer[0] << 8) + buffer[1] < 0x0a) {
+ sr_printk(KERN_INFO, cd, "Hmm, seems the drive "
+ "doesn't support multisession CD's\n");
+ no_multi = 1;
+ break;
+ }
+ sector = buffer[11] + (buffer[10] << 8) +
+ (buffer[9] << 16) + (buffer[8] << 24);
+ if (buffer[6] <= 1) {
+ /* ignore sector offsets from first track */
+ sector = 0;
+ }
+ break;
+
+ case VENDOR_NEC:{
+ unsigned long min, sec, frame;
+ cgc.cmd[0] = 0xde;
+ cgc.cmd[1] = 0x03;
+ cgc.cmd[2] = 0xb0;
+ cgc.buffer = buffer;
+ cgc.buflen = 0x16;
+ cgc.quiet = 1;
+ cgc.data_direction = DMA_FROM_DEVICE;
+ cgc.timeout = VENDOR_TIMEOUT;
+ rc = sr_do_ioctl(cd, &cgc);
+ if (rc != 0)
+ break;
+ if (buffer[14] != 0 && buffer[14] != 0xb0) {
+ sr_printk(KERN_INFO, cd, "Hmm, seems the cdrom "
+ "doesn't support multisession CD's\n");
+
+ no_multi = 1;
+ break;
+ }
+ min = bcd2bin(buffer[15]);
+ sec = bcd2bin(buffer[16]);
+ frame = bcd2bin(buffer[17]);
+ sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
+ break;
+ }
+
+ case VENDOR_TOSHIBA:{
+ unsigned long min, sec, frame;
+
+ /* we request some disc information (is it a XA-CD ?,
+ * where starts the last session ?) */
+ cgc.cmd[0] = 0xc7;
+ cgc.cmd[1] = 0x03;
+ cgc.buffer = buffer;
+ cgc.buflen = 4;
+ cgc.quiet = 1;
+ cgc.data_direction = DMA_FROM_DEVICE;
+ cgc.timeout = VENDOR_TIMEOUT;
+ rc = sr_do_ioctl(cd, &cgc);
+ if (rc == -EINVAL) {
+ sr_printk(KERN_INFO, cd, "Hmm, seems the drive "
+ "doesn't support multisession CD's\n");
+ no_multi = 1;
+ break;
+ }
+ if (rc != 0)
+ break;
+ min = bcd2bin(buffer[1]);
+ sec = bcd2bin(buffer[2]);
+ frame = bcd2bin(buffer[3]);
+ sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
+ if (sector)
+ sector -= CD_MSF_OFFSET;
+ sr_set_blocklength(cd, 2048);
+ break;
+ }
+
+ case VENDOR_WRITER:
+ cgc.cmd[0] = READ_TOC;
+ cgc.cmd[8] = 0x04;
+ cgc.cmd[9] = 0x40;
+ cgc.buffer = buffer;
+ cgc.buflen = 0x04;
+ cgc.quiet = 1;
+ cgc.data_direction = DMA_FROM_DEVICE;
+ cgc.timeout = VENDOR_TIMEOUT;
+ rc = sr_do_ioctl(cd, &cgc);
+ if (rc != 0) {
+ break;
+ }
+ if ((rc = buffer[2]) == 0) {
+ sr_printk(KERN_WARNING, cd,
+ "No finished session\n");
+ break;
+ }
+ cgc.cmd[0] = READ_TOC; /* Read TOC */
+ cgc.cmd[6] = rc & 0x7f; /* number of last session */
+ cgc.cmd[8] = 0x0c;
+ cgc.cmd[9] = 0x40;
+ cgc.buffer = buffer;
+ cgc.buflen = 12;
+ cgc.quiet = 1;
+ cgc.data_direction = DMA_FROM_DEVICE;
+ cgc.timeout = VENDOR_TIMEOUT;
+ rc = sr_do_ioctl(cd, &cgc);
+ if (rc != 0) {
+ break;
+ }
+ sector = buffer[11] + (buffer[10] << 8) +
+ (buffer[9] << 16) + (buffer[8] << 24);
+ break;
+
+ default:
+ /* should not happen */
+ sr_printk(KERN_WARNING, cd,
+ "unknown vendor code (%i), not initialized ?\n",
+ cd->vendor);
+ sector = 0;
+ no_multi = 1;
+ break;
+ }
+ cd->ms_offset = sector;
+ cd->xa_flag = 0;
+ if (CDS_AUDIO != sr_disk_status(cdi) && 1 == sr_is_xa(cd))
+ cd->xa_flag = 1;
+
+ if (2048 != cd->device->sector_size) {
+ sr_set_blocklength(cd, 2048);
+ }
+ if (no_multi)
+ cdi->mask |= CDC_MULTI_SESSION;
+
+#ifdef DEBUG
+ if (sector)
+ sr_printk(KERN_DEBUG, cd, "multisession offset=%lu\n",
+ sector);
+#endif
+ kfree(buffer);
+ return rc;
+}
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