root / hw / cdrom.c @ c5d6edc3
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/*
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* QEMU ATAPI CD-ROM Emulator
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*
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* Copyright (c) 2006 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/* ??? Most of the ATAPI emulation is still in ide.c. It should be moved
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here. */
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#include <vl.h> |
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static void lba_to_msf(uint8_t *buf, int lba) |
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{ |
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lba += 150;
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buf[0] = (lba / 75) / 60; |
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buf[1] = (lba / 75) % 60; |
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buf[2] = lba % 75; |
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} |
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/* same toc as bochs. Return -1 if error or the toc length */
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/* XXX: check this */
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int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track) |
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{ |
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uint8_t *q; |
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int len;
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if (start_track > 1 && start_track != 0xaa) |
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return -1; |
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q = buf + 2;
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*q++ = 1; /* first session */ |
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*q++ = 1; /* last session */ |
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if (start_track <= 1) { |
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*q++ = 0; /* reserved */ |
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*q++ = 0x14; /* ADR, control */ |
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*q++ = 1; /* track number */ |
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*q++ = 0; /* reserved */ |
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if (msf) {
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*q++ = 0; /* reserved */ |
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lba_to_msf(q, 0);
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q += 3;
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} else {
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/* sector 0 */
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cpu_to_be32wu((uint32_t *)q, 0);
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q += 4;
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} |
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} |
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/* lead out track */
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*q++ = 0; /* reserved */ |
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*q++ = 0x16; /* ADR, control */ |
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*q++ = 0xaa; /* track number */ |
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*q++ = 0; /* reserved */ |
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if (msf) {
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*q++ = 0; /* reserved */ |
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lba_to_msf(q, nb_sectors); |
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q += 3;
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} else {
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cpu_to_be32wu((uint32_t *)q, nb_sectors); |
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q += 4;
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} |
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len = q - buf; |
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cpu_to_be16wu((uint16_t *)buf, len - 2);
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return len;
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} |
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/* mostly same info as PearPc */
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int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num) |
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{ |
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uint8_t *q; |
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int len;
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q = buf + 2;
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*q++ = 1; /* first session */ |
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*q++ = 1; /* last session */ |
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*q++ = 1; /* session number */ |
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*q++ = 0x14; /* data track */ |
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*q++ = 0; /* track number */ |
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*q++ = 0xa0; /* lead-in */ |
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*q++ = 0; /* min */ |
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*q++ = 0; /* sec */ |
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*q++ = 0; /* frame */ |
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*q++ = 0;
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*q++ = 1; /* first track */ |
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*q++ = 0x00; /* disk type */ |
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*q++ = 0x00;
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*q++ = 1; /* session number */ |
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*q++ = 0x14; /* data track */ |
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*q++ = 0; /* track number */ |
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*q++ = 0xa1;
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*q++ = 0; /* min */ |
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*q++ = 0; /* sec */ |
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*q++ = 0; /* frame */ |
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*q++ = 0;
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*q++ = 1; /* last track */ |
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*q++ = 0x00;
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*q++ = 0x00;
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*q++ = 1; /* session number */ |
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*q++ = 0x14; /* data track */ |
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*q++ = 0; /* track number */ |
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*q++ = 0xa2; /* lead-out */ |
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*q++ = 0; /* min */ |
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*q++ = 0; /* sec */ |
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*q++ = 0; /* frame */ |
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if (msf) {
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*q++ = 0; /* reserved */ |
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lba_to_msf(q, nb_sectors); |
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q += 3;
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} else {
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cpu_to_be32wu((uint32_t *)q, nb_sectors); |
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q += 4;
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} |
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*q++ = 1; /* session number */ |
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*q++ = 0x14; /* ADR, control */ |
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*q++ = 0; /* track number */ |
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*q++ = 1; /* point */ |
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*q++ = 0; /* min */ |
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*q++ = 0; /* sec */ |
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*q++ = 0; /* frame */ |
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if (msf) {
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*q++ = 0;
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lba_to_msf(q, 0);
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q += 3;
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} else {
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*q++ = 0;
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*q++ = 0;
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*q++ = 0;
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*q++ = 0;
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} |
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len = q - buf; |
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cpu_to_be16wu((uint16_t *)buf, len - 2);
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return len;
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} |
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