diff options
Diffstat (limited to 'extras/cdrom_id/cdrom_id.c')
| -rw-r--r-- | extras/cdrom_id/cdrom_id.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/extras/cdrom_id/cdrom_id.c b/extras/cdrom_id/cdrom_id.c index 9c4f6f31b4..6500206228 100644 --- a/extras/cdrom_id/cdrom_id.c +++ b/extras/cdrom_id/cdrom_id.c @@ -348,6 +348,41 @@ static int feature_profiles(struct udev *udev, const unsigned char *profiles, si return 0; } +static int cd_profiles_old_mmc(struct udev *udev, int fd) +{ + struct scsi_cmd sc; + int err; + + unsigned char header[32]; + + scsi_cmd_init(udev, &sc, header, sizeof(header)); + scsi_cmd_set(udev, &sc, 0, 0x51); + scsi_cmd_set(udev, &sc, 8, sizeof(header)); + scsi_cmd_set(udev, &sc, 9, 0); + err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header)); + if ((err != 0)) { + info_scsi_cmd_err(udev, "READ DISC INFORMATION", err); + info(udev, "no current profile, assuming no media\n"); + return -1; + }; + + cd_media = 1; + + if (header[2] & 16) { + cd_media_cd_rw = 1; + info(udev, "profile 0x0a media_cd_rw\n"); + } + else if ((header[2] & 3) < 2 && cd_cd_r) { + cd_media_cd_r = 1; + info(udev, "profile 0x09 media_cd_r\n"); + } + else { + cd_media_cd_rom = 1; + info(udev, "profile 0x08 media_cd_rom\n"); + } + return 0; +} + static int cd_profiles(struct udev *udev, int fd) { struct scsi_cmd sc; @@ -365,6 +400,12 @@ static int cd_profiles(struct udev *udev, int fd) err = scsi_cmd_run(udev, &sc, fd, features, sizeof(features)); if ((err != 0)) { info_scsi_cmd_err(udev, "GET CONFIGURATION", err); + /* handle pre-MMC2 drives which do not support GET CONFIGURATION */ + if (SK(err) == 0x5 && ASC(err) == 0x20) { + info(udev, "drive is pre-MMC2 and does not support 46h get configuration command\n"); + info(udev, "trying to work around the problem\n"); + return cd_profiles_old_mmc(udev, fd); + } return -1; } |