diff options
Diffstat (limited to 'hw/cdrom.c')
| -rw-r--r-- | hw/cdrom.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/hw/cdrom.c b/hw/cdrom.c new file mode 100644 index 0000000000..a43b417902 --- /dev/null +++ b/hw/cdrom.c @@ -0,0 +1,156 @@ +/* + * QEMU ATAPI CD-ROM Emulator + * + * Copyright (c) 2006 Fabrice Bellard + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +/* ??? Most of the ATAPI emulation is still in ide.c. It should be moved + here. */ + +#include <vl.h> + +static void lba_to_msf(uint8_t *buf, int lba) +{ + lba += 150; + buf[0] = (lba / 75) / 60; + buf[1] = (lba / 75) % 60; + buf[2] = lba % 75; +} + +/* same toc as bochs. Return -1 if error or the toc length */ +/* XXX: check this */ +int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track) +{ + uint8_t *q; + int len; + + if (start_track > 1 && start_track != 0xaa) + return -1; + q = buf + 2; + *q++ = 1; /* first session */ + *q++ = 1; /* last session */ + if (start_track <= 1) { + *q++ = 0; /* reserved */ + *q++ = 0x14; /* ADR, control */ + *q++ = 1; /* track number */ + *q++ = 0; /* reserved */ + if (msf) { + *q++ = 0; /* reserved */ + lba_to_msf(q, 0); + q += 3; + } else { + /* sector 0 */ + cpu_to_be32wu((uint32_t *)q, 0); + q += 4; + } + } + /* lead out track */ + *q++ = 0; /* reserved */ + *q++ = 0x16; /* ADR, control */ + *q++ = 0xaa; /* track number */ + *q++ = 0; /* reserved */ + if (msf) { + *q++ = 0; /* reserved */ + lba_to_msf(q, nb_sectors); + q += 3; + } else { + cpu_to_be32wu((uint32_t *)q, nb_sectors); + q += 4; + } + len = q - buf; + cpu_to_be16wu((uint16_t *)buf, len - 2); + return len; +} + +/* mostly same info as PearPc */ +int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num) +{ + uint8_t *q; + int len; + + q = buf + 2; + *q++ = 1; /* first session */ + *q++ = 1; /* last session */ + + *q++ = 1; /* session number */ + *q++ = 0x14; /* data track */ + *q++ = 0; /* track number */ + *q++ = 0xa0; /* lead-in */ + *q++ = 0; /* min */ + *q++ = 0; /* sec */ + *q++ = 0; /* frame */ + *q++ = 0; + *q++ = 1; /* first track */ + *q++ = 0x00; /* disk type */ + *q++ = 0x00; + + *q++ = 1; /* session number */ + *q++ = 0x14; /* data track */ + *q++ = 0; /* track number */ + *q++ = 0xa1; + *q++ = 0; /* min */ + *q++ = 0; /* sec */ + *q++ = 0; /* frame */ + *q++ = 0; + *q++ = 1; /* last track */ + *q++ = 0x00; + *q++ = 0x00; + + *q++ = 1; /* session number */ + *q++ = 0x14; /* data track */ + *q++ = 0; /* track number */ + *q++ = 0xa2; /* lead-out */ + *q++ = 0; /* min */ + *q++ = 0; /* sec */ + *q++ = 0; /* frame */ + if (msf) { + *q++ = 0; /* reserved */ + lba_to_msf(q, nb_sectors); + q += 3; + } else { + cpu_to_be32wu((uint32_t *)q, nb_sectors); + q += 4; + } + + *q++ = 1; /* session number */ + *q++ = 0x14; /* ADR, control */ + *q++ = 0; /* track number */ + *q++ = 1; /* point */ + *q++ = 0; /* min */ + *q++ = 0; /* sec */ + *q++ = 0; /* frame */ + if (msf) { + *q++ = 0; + lba_to_msf(q, 0); + q += 3; + } else { + *q++ = 0; + *q++ = 0; + *q++ = 0; + *q++ = 0; + } + + len = q - buf; + cpu_to_be16wu((uint16_t *)buf, len - 2); + return len; +} + + |