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679b2ec8e0
This kernel configuration is basically enabling/disabling sr driver quirks detection. While these quirks are for fairly rare devices (very old CD burners, and a glucometer), the additional detection of these models is a very minimal amount of code. The logic behind the quirks is always built into the sr driver. This also removes the config from all the defconfig files that are enabling this already. Link: https://lore.kernel.org/r/20200223191144.726-1-flameeyes@flameeyes.com Reviewed-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Diego Elio Pettenò <flameeyes@flameeyes.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
341 lines
8.8 KiB
C
341 lines
8.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* -*-linux-c-*-
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* vendor-specific code for SCSI CD-ROM's goes here.
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*
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* This is needed becauce most of the new features (multisession and
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* the like) are too new to be included into the SCSI-II standard (to
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* be exact: there is'nt anything in my draft copy).
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*
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* Aug 1997: Ha! Got a SCSI-3 cdrom spec across my fingers. SCSI-3 does
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* multisession using the READ TOC command (like SONY).
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*
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* Rearranged stuff here: SCSI-3 is included allways, support
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* for NEC/TOSHIBA/HP commands is optional.
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*
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* Gerd Knorr <kraxel@cs.tu-berlin.de>
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*
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* --------------------------------------------------------------------------
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*
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* support for XA/multisession-CD's
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*
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* - NEC: Detection and support of multisession CD's.
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*
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* - TOSHIBA: Detection and support of multisession CD's.
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* Some XA-Sector tweaking, required for older drives.
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*
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* - SONY: Detection and support of multisession CD's.
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* added by Thomas Quinot <thomas@cuivre.freenix.fr>
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*
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* - PIONEER, HITACHI, PLEXTOR, MATSHITA, TEAC, PHILIPS: known to
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* work with SONY (SCSI3 now) code.
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*
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* - HP: Much like SONY, but a little different... (Thomas)
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* HP-Writers only ??? Maybe other CD-Writers work with this too ?
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* HP 6020 writers now supported.
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*/
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#include <linux/cdrom.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/bcd.h>
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#include <linux/blkdev.h>
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#include <linux/slab.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_ioctl.h>
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#include "sr.h"
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#if 0
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#define DEBUG
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#endif
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/* here are some constants to sort the vendors into groups */
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#define VENDOR_SCSI3 1 /* default: scsi-3 mmc */
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#define VENDOR_NEC 2
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#define VENDOR_TOSHIBA 3
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#define VENDOR_WRITER 4 /* pre-scsi3 writers */
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#define VENDOR_CYGNAL_85ED 5 /* CD-on-a-chip */
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#define VENDOR_TIMEOUT 30*HZ
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void sr_vendor_init(Scsi_CD *cd)
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{
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const char *vendor = cd->device->vendor;
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const char *model = cd->device->model;
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/* default */
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cd->vendor = VENDOR_SCSI3;
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if (cd->readcd_known)
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/* this is true for scsi3/mmc drives - no more checks */
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return;
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if (cd->device->type == TYPE_WORM) {
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cd->vendor = VENDOR_WRITER;
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} else if (!strncmp(vendor, "NEC", 3)) {
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cd->vendor = VENDOR_NEC;
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if (!strncmp(model, "CD-ROM DRIVE:25", 15) ||
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!strncmp(model, "CD-ROM DRIVE:36", 15) ||
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!strncmp(model, "CD-ROM DRIVE:83", 15) ||
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!strncmp(model, "CD-ROM DRIVE:84 ", 16)
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#if 0
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/* my NEC 3x returns the read-raw data if a read-raw
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is followed by a read for the same sector - aeb */
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|| !strncmp(model, "CD-ROM DRIVE:500", 16)
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#endif
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)
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/* these can't handle multisession, may hang */
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cd->cdi.mask |= CDC_MULTI_SESSION;
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} else if (!strncmp(vendor, "TOSHIBA", 7)) {
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cd->vendor = VENDOR_TOSHIBA;
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} else if (!strncmp(vendor, "Beurer", 6) &&
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!strncmp(model, "Gluco Memory", 12)) {
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/* The Beurer GL50 evo uses a Cygnal-manufactured CD-on-a-chip
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that only accepts a subset of SCSI commands. Most of the
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not-implemented commands are fine to fail, but a few,
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particularly around the MMC or Audio commands, will put the
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device into an unrecoverable state, so they need to be
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avoided at all costs.
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*/
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cd->vendor = VENDOR_CYGNAL_85ED;
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cd->cdi.mask |= (
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CDC_MULTI_SESSION |
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CDC_CLOSE_TRAY | CDC_OPEN_TRAY |
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CDC_LOCK |
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CDC_GENERIC_PACKET |
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CDC_PLAY_AUDIO
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);
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}
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}
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/* small handy function for switching block length using MODE SELECT,
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* used by sr_read_sector() */
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int sr_set_blocklength(Scsi_CD *cd, int blocklength)
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{
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unsigned char *buffer; /* the buffer for the ioctl */
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struct packet_command cgc;
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struct ccs_modesel_head *modesel;
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int rc, density = 0;
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if (cd->vendor == VENDOR_TOSHIBA)
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density = (blocklength > 2048) ? 0x81 : 0x83;
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buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
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if (!buffer)
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return -ENOMEM;
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#ifdef DEBUG
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sr_printk(KERN_INFO, cd, "MODE SELECT 0x%x/%d\n", density, blocklength);
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#endif
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memset(&cgc, 0, sizeof(struct packet_command));
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cgc.cmd[0] = MODE_SELECT;
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cgc.cmd[1] = (1 << 4);
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cgc.cmd[4] = 12;
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modesel = (struct ccs_modesel_head *) buffer;
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memset(modesel, 0, sizeof(*modesel));
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modesel->block_desc_length = 0x08;
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modesel->density = density;
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modesel->block_length_med = (blocklength >> 8) & 0xff;
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modesel->block_length_lo = blocklength & 0xff;
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cgc.buffer = buffer;
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cgc.buflen = sizeof(*modesel);
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cgc.data_direction = DMA_TO_DEVICE;
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cgc.timeout = VENDOR_TIMEOUT;
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if (0 == (rc = sr_do_ioctl(cd, &cgc))) {
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cd->device->sector_size = blocklength;
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}
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#ifdef DEBUG
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else
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sr_printk(KERN_INFO, cd,
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"switching blocklength to %d bytes failed\n",
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blocklength);
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#endif
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kfree(buffer);
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return rc;
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}
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/* This function gets called after a media change. Checks if the CD is
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multisession, asks for offset etc. */
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int sr_cd_check(struct cdrom_device_info *cdi)
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{
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Scsi_CD *cd = cdi->handle;
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unsigned long sector;
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unsigned char *buffer; /* the buffer for the ioctl */
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struct packet_command cgc;
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int rc, no_multi;
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if (cd->cdi.mask & CDC_MULTI_SESSION)
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return 0;
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buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
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if (!buffer)
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return -ENOMEM;
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sector = 0; /* the multisession sector offset goes here */
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no_multi = 0; /* flag: the drive can't handle multisession */
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rc = 0;
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memset(&cgc, 0, sizeof(struct packet_command));
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switch (cd->vendor) {
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case VENDOR_SCSI3:
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cgc.cmd[0] = READ_TOC;
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cgc.cmd[8] = 12;
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cgc.cmd[9] = 0x40;
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cgc.buffer = buffer;
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cgc.buflen = 12;
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cgc.quiet = 1;
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cgc.data_direction = DMA_FROM_DEVICE;
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cgc.timeout = VENDOR_TIMEOUT;
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rc = sr_do_ioctl(cd, &cgc);
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if (rc != 0)
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break;
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if ((buffer[0] << 8) + buffer[1] < 0x0a) {
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sr_printk(KERN_INFO, cd, "Hmm, seems the drive "
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"doesn't support multisession CD's\n");
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no_multi = 1;
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break;
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}
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sector = buffer[11] + (buffer[10] << 8) +
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(buffer[9] << 16) + (buffer[8] << 24);
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if (buffer[6] <= 1) {
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/* ignore sector offsets from first track */
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sector = 0;
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}
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break;
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case VENDOR_NEC:{
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unsigned long min, sec, frame;
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cgc.cmd[0] = 0xde;
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cgc.cmd[1] = 0x03;
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cgc.cmd[2] = 0xb0;
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cgc.buffer = buffer;
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cgc.buflen = 0x16;
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cgc.quiet = 1;
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cgc.data_direction = DMA_FROM_DEVICE;
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cgc.timeout = VENDOR_TIMEOUT;
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rc = sr_do_ioctl(cd, &cgc);
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if (rc != 0)
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break;
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if (buffer[14] != 0 && buffer[14] != 0xb0) {
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sr_printk(KERN_INFO, cd, "Hmm, seems the cdrom "
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"doesn't support multisession CD's\n");
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no_multi = 1;
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break;
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}
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min = bcd2bin(buffer[15]);
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sec = bcd2bin(buffer[16]);
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frame = bcd2bin(buffer[17]);
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sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
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break;
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}
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case VENDOR_TOSHIBA:{
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unsigned long min, sec, frame;
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/* we request some disc information (is it a XA-CD ?,
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* where starts the last session ?) */
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cgc.cmd[0] = 0xc7;
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cgc.cmd[1] = 0x03;
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cgc.buffer = buffer;
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cgc.buflen = 4;
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cgc.quiet = 1;
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cgc.data_direction = DMA_FROM_DEVICE;
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cgc.timeout = VENDOR_TIMEOUT;
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rc = sr_do_ioctl(cd, &cgc);
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if (rc == -EINVAL) {
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sr_printk(KERN_INFO, cd, "Hmm, seems the drive "
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"doesn't support multisession CD's\n");
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no_multi = 1;
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break;
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}
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if (rc != 0)
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break;
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min = bcd2bin(buffer[1]);
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sec = bcd2bin(buffer[2]);
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frame = bcd2bin(buffer[3]);
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sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
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if (sector)
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sector -= CD_MSF_OFFSET;
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sr_set_blocklength(cd, 2048);
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break;
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}
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case VENDOR_WRITER:
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cgc.cmd[0] = READ_TOC;
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cgc.cmd[8] = 0x04;
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cgc.cmd[9] = 0x40;
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cgc.buffer = buffer;
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cgc.buflen = 0x04;
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cgc.quiet = 1;
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cgc.data_direction = DMA_FROM_DEVICE;
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cgc.timeout = VENDOR_TIMEOUT;
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rc = sr_do_ioctl(cd, &cgc);
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if (rc != 0) {
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break;
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}
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if ((rc = buffer[2]) == 0) {
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sr_printk(KERN_WARNING, cd,
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"No finished session\n");
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break;
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}
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cgc.cmd[0] = READ_TOC; /* Read TOC */
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cgc.cmd[6] = rc & 0x7f; /* number of last session */
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cgc.cmd[8] = 0x0c;
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cgc.cmd[9] = 0x40;
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cgc.buffer = buffer;
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cgc.buflen = 12;
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cgc.quiet = 1;
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cgc.data_direction = DMA_FROM_DEVICE;
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cgc.timeout = VENDOR_TIMEOUT;
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rc = sr_do_ioctl(cd, &cgc);
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if (rc != 0) {
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break;
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}
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sector = buffer[11] + (buffer[10] << 8) +
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(buffer[9] << 16) + (buffer[8] << 24);
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break;
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default:
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/* should not happen */
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sr_printk(KERN_WARNING, cd,
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"unknown vendor code (%i), not initialized ?\n",
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cd->vendor);
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sector = 0;
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no_multi = 1;
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break;
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}
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cd->ms_offset = sector;
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cd->xa_flag = 0;
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if (CDS_AUDIO != sr_disk_status(cdi) && 1 == sr_is_xa(cd))
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cd->xa_flag = 1;
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if (2048 != cd->device->sector_size) {
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sr_set_blocklength(cd, 2048);
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}
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if (no_multi)
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cdi->mask |= CDC_MULTI_SESSION;
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#ifdef DEBUG
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if (sector)
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sr_printk(KERN_DEBUG, cd, "multisession offset=%lu\n",
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sector);
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#endif
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kfree(buffer);
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return rc;
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}
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