xref: /illumos-kvm-cmd/hw/cdrom.c (revision 68396ea9)
1 /*
2  * QEMU ATAPI CD-ROM Emulator
3  *
4  * Copyright (c) 2006 Fabrice Bellard
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to deal
8  * in the Software without restriction, including without limitation the rights
9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10  * copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22  * THE SOFTWARE.
23  */
24 
25 /* ??? Most of the ATAPI emulation is still in ide.c.  It should be moved
26    here.  */
27 
28 #include "qemu-common.h"
29 #include "scsi.h"
30 
lba_to_msf(uint8_t * buf,int lba)31 static void lba_to_msf(uint8_t *buf, int lba)
32 {
33     lba += 150;
34     buf[0] = (lba / 75) / 60;
35     buf[1] = (lba / 75) % 60;
36     buf[2] = lba % 75;
37 }
38 
39 /* same toc as bochs. Return -1 if error or the toc length */
40 /* XXX: check this */
cdrom_read_toc(int nb_sectors,uint8_t * buf,int msf,int start_track)41 int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track)
42 {
43     uint8_t *q;
44     int len;
45 
46     if (start_track > 1 && start_track != 0xaa)
47         return -1;
48     q = buf + 2;
49     *q++ = 1; /* first session */
50     *q++ = 1; /* last session */
51     if (start_track <= 1) {
52         *q++ = 0; /* reserved */
53         *q++ = 0x14; /* ADR, control */
54         *q++ = 1;    /* track number */
55         *q++ = 0; /* reserved */
56         if (msf) {
57             *q++ = 0; /* reserved */
58             lba_to_msf(q, 0);
59             q += 3;
60         } else {
61             /* sector 0 */
62             cpu_to_be32wu((uint32_t *)q, 0);
63             q += 4;
64         }
65     }
66     /* lead out track */
67     *q++ = 0; /* reserved */
68     *q++ = 0x16; /* ADR, control */
69     *q++ = 0xaa; /* track number */
70     *q++ = 0; /* reserved */
71     if (msf) {
72         *q++ = 0; /* reserved */
73         lba_to_msf(q, nb_sectors);
74         q += 3;
75     } else {
76         cpu_to_be32wu((uint32_t *)q, nb_sectors);
77         q += 4;
78     }
79     len = q - buf;
80     cpu_to_be16wu((uint16_t *)buf, len - 2);
81     return len;
82 }
83 
84 /* mostly same info as PearPc */
cdrom_read_toc_raw(int nb_sectors,uint8_t * buf,int msf,int session_num)85 int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num)
86 {
87     uint8_t *q;
88     int len;
89 
90     q = buf + 2;
91     *q++ = 1; /* first session */
92     *q++ = 1; /* last session */
93 
94     *q++ = 1; /* session number */
95     *q++ = 0x14; /* data track */
96     *q++ = 0; /* track number */
97     *q++ = 0xa0; /* lead-in */
98     *q++ = 0; /* min */
99     *q++ = 0; /* sec */
100     *q++ = 0; /* frame */
101     *q++ = 0;
102     *q++ = 1; /* first track */
103     *q++ = 0x00; /* disk type */
104     *q++ = 0x00;
105 
106     *q++ = 1; /* session number */
107     *q++ = 0x14; /* data track */
108     *q++ = 0; /* track number */
109     *q++ = 0xa1;
110     *q++ = 0; /* min */
111     *q++ = 0; /* sec */
112     *q++ = 0; /* frame */
113     *q++ = 0;
114     *q++ = 1; /* last track */
115     *q++ = 0x00;
116     *q++ = 0x00;
117 
118     *q++ = 1; /* session number */
119     *q++ = 0x14; /* data track */
120     *q++ = 0; /* track number */
121     *q++ = 0xa2; /* lead-out */
122     *q++ = 0; /* min */
123     *q++ = 0; /* sec */
124     *q++ = 0; /* frame */
125     if (msf) {
126         *q++ = 0; /* reserved */
127         lba_to_msf(q, nb_sectors);
128         q += 3;
129     } else {
130         cpu_to_be32wu((uint32_t *)q, nb_sectors);
131         q += 4;
132     }
133 
134     *q++ = 1; /* session number */
135     *q++ = 0x14; /* ADR, control */
136     *q++ = 0;    /* track number */
137     *q++ = 1;    /* point */
138     *q++ = 0; /* min */
139     *q++ = 0; /* sec */
140     *q++ = 0; /* frame */
141     if (msf) {
142         *q++ = 0;
143         lba_to_msf(q, 0);
144         q += 3;
145     } else {
146         *q++ = 0;
147         *q++ = 0;
148         *q++ = 0;
149         *q++ = 0;
150     }
151 
152     len = q - buf;
153     cpu_to_be16wu((uint16_t *)buf, len - 2);
154     return len;
155 }
156