git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3177 c046a42c-6fe2-441c-8c8c-71466251a162
157 lines
4.1 KiB
C
157 lines
4.1 KiB
C
/*
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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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