Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 329 insertions, 0 deletions

diff --git a/drivers/scsi/sr_vendor.c b/drivers/scsi/sr_vendor.c
new file mode 100644
index 000000000000..78274dc91f5c
--- /dev/null
+++ b/drivers/scsi/sr_vendor.c
@@ -0,0 +1,329 @@
+/* -*-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/config.h>
+#include <linux/cdrom.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/bcd.h>
+#include <linux/blkdev.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_TIMEOUT	30*HZ
+
+void sr_vendor_init(Scsi_CD *cd)
+{
+#ifndef CONFIG_BLK_DEV_SR_VENDOR
+	cd->vendor = VENDOR_SCSI3;
+#else
+	char *vendor = cd->device->vendor;
+	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;
+
+	}
+#endif
+}
+
+
+/* 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;
+
+#ifdef CONFIG_BLK_DEV_SR_VENDOR
+	if (cd->vendor == VENDOR_TOSHIBA)
+		density = (blocklength > 2048) ? 0x81 : 0x83;
+#endif
+
+	buffer = (unsigned char *) kmalloc(512, GFP_KERNEL | GFP_DMA);
+	if (!buffer)
+		return -ENOMEM;
+
+#ifdef DEBUG
+	printk("%s: MODE SELECT 0x%x/%d\n", cd->cdi.name, 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
+		printk("%s: switching blocklength to %d bytes failed\n",
+		       cd->cdi.name, 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 = (unsigned char *) kmalloc(512, GFP_KERNEL | GFP_DMA);
+	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) {
+			printk(KERN_INFO "%s: Hmm, seems the drive "
+			   "doesn't support multisession CD's\n", cd->cdi.name);
+			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;
+
+#ifdef CONFIG_BLK_DEV_SR_VENDOR
+	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) {
+				printk(KERN_INFO "%s: Hmm, seems the cdrom "
+				       "doesn't support multisession CD's\n",
+				       cd->cdi.name);
+				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) {
+				printk(KERN_INFO "%s: Hmm, seems the drive "
+				       "doesn't support multisession CD's\n",
+				       cd->cdi.name);
+				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) {
+			printk(KERN_WARNING
+			       "%s: No finished session\n", cd->cdi.name);
+			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;
+#endif				/* CONFIG_BLK_DEV_SR_VENDOR */
+
+	default:
+		/* should not happen */
+		printk(KERN_WARNING
+		   "%s: unknown vendor code (%i), not initialized ?\n",
+		       cd->cdi.name, 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)
+		printk(KERN_DEBUG "%s: multisession offset=%lu\n",
+		       cd->cdi.name, sector);
+#endif
+	kfree(buffer);
+	return rc;
+}