// SPDX-License-Identifier: GPL-2.0 #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 <linux/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 local_sshdr, *sshdr = &local_sshdr; int result, err = 0, retries = 0; SDev = cd->device; if (cgc->sshdr) sshdr = cgc->sshdr; retry: if (!scsi_block_when_processing_errors(SDev)) { err = -ENODEV; goto out; } result = scsi_execute(SDev, cgc->cmd, cgc->data_direction, cgc->buffer, cgc->buflen, NULL, sshdr, cgc->timeout, IOCTL_RETRIES, 0, 0, NULL); /* 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: 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; }