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/osdep.h" |
29 | #include "hw/scsi/scsi.h" |
30 | |
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 */ |
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 | stl_be_p(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 | stl_be_p(q, nb_sectors); |
77 | q += 4; |
78 | } |
79 | len = q - buf; |
80 | stw_be_p(buf, len - 2); |
81 | return len; |
82 | } |
83 | |
84 | /* mostly same info as PearPc */ |
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 | stl_be_p(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 | stw_be_p(buf, len - 2); |
154 | return len; |
155 | } |
156 | |