diff options
Diffstat (limited to 'include/linux/cdrom.h')
| -rw-r--r-- | include/linux/cdrom.h | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h index aba1458c3..1c2ede5e0 100644 --- a/include/linux/cdrom.h +++ b/include/linux/cdrom.h @@ -61,7 +61,36 @@ * * - XA data (green, mode2 form2): | sync - head - sub - data - EDC | * | 12 - 4 - 8 - 2324 - 4 | + * + * Sector types (format) - Forces the CD-ROM to read the specified sector type, + * attempt to read any other format ends with an error + * + * format sector type user data size (bytes) + * ----------------------------------------------------------------------------- + * 1 CD DA (Red Book) 2352 (CD_FRAMESIZE_RAW) + * 2 Mode1 Form1 (Yellow Book) 2048 (CD_FRAMESIZE) + * 3 Mode1 Form2 (Yellow Book) 2336 (CD_FRAMESIZE_RAW0) + * 4 Mode2 Form1 (Green Book) 2048 (CD_FRAMESIZE) + * 5 Mode2 Form2 (Green Book) 2328 (2324+4 spare bytes) + * + * + * Data Selection Field (pc.c[9]) - This value controls the actual number + * of bytes transferred from the CD-ROM + * + * bit 7 6 5 4 3 2 1 0 + * ---------------------------------------------------------------------------- + * | Sync | Sub | Header | User | EDC & | Error | Block | reserved + * | | Header | | Data | ECC | Flags | Error | + * \-------------------------------------------/\---------------/ + * | | + * V V + * stored on CD (2532) generated during error correction + * + * The maximal number of bytes returned by CD-ROM is 2646 (CD_FRAMESIZE_RAWER), + * when pc.c[9] = 0xfa. + * */ + /* * CDROM IOCTL structures @@ -339,7 +368,8 @@ struct ccs_modesel_head u_char number_blocks_lo; u_char _r3; u_char block_length_hi; /* block length for blocks in this desc */ - u_short block_length; + u_char block_length_med; + u_char block_length_lo; }; /* |