1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
/*
*
* Copyright (C) 2012 secunet Security Networks AG
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <stdint.h>
#include <stdio.h>
#include <libpayload.h>
#include <storage/ata.h>
#include <storage/atapi.h>
static int atapi_request_sense(atapi_dev_t *const dev)
{
u8 cdb[12] = { 0, };
cdb[0] = ATAPI_REQUEST_SENSE;
cdb[4] = sizeof(dev->sense_data);
return dev->packet_read_cmd(dev, cdb, sizeof(cdb),
dev->sense_data, sizeof(dev->sense_data));
}
static ssize_t atapi_packet_read_cmd(atapi_dev_t *const dev,
const u8 *const cmd, const size_t cmdlen,
u8 *const buf, const size_t buflen)
{
int retries = 10;
ssize_t ret;
do {
ret = dev->packet_read_cmd(dev, cmd, cmdlen, buf, buflen);
if (ret >= 0)
return ret;
ret = atapi_request_sense(dev);
if (ret < 0) {
printf("atapi: Requesting sense failed.\n");
return -1;
}
switch (dev->sense_data[2] & 0xf) {
case ATAPI_SENSE_UNIT_ATTENTION:
/* Nothing to do. */
break;
case ATAPI_SENSE_NOT_READY:
switch (dev->sense_data[12]) {
case ATAPI_ADDITIONAL_SENSE_LOGICAL_UNIT_NOT_READY:
/* Device wants more time. */
delay(3);
break;
case ATAPI_ADDITIONAL_SENSE_MEDIUM_NOT_PRESENT:
printf("atapi: No medium present.\n");
dev->medium_present = 0;
return -1;
}
break;
default:
return -1;
}
} while (retries--);
/* No more retries. */
return -1;
}
static ssize_t atapi_packet_read_sectors(ata_dev_t *const _dev,
const lba_t start, size_t count,
u8 *const buf)
{
atapi_dev_t *const dev = (atapi_dev_t *)_dev;
if (start >= (1ULL << 32)) {
printf("atapi: Sector is not 32-bit addressable.\n");
return -1;
} else if (count >= (64 * 1024)) {
printf("ahci: Sector count too high (max. 65535).\n");
count = (64 * 1024) - 1;
}
u8 cdb[12] = { 0, };
cdb[0] = ATAPI_READ_10;
cdb[2] = (start >> 24) & 0xff;
cdb[3] = (start >> 16) & 0xff;
cdb[4] = (start >> 8) & 0xff;
cdb[5] = (start >> 0) & 0xff;
cdb[7] = (count >> 8) & 0xff;
cdb[8] = (count >> 0) & 0xff;
const ssize_t ret = atapi_packet_read_cmd(dev, cdb, sizeof(cdb),
buf, count << dev->ata_dev.sector_size_shift);
if (ret < 0)
return ret;
else
return ret >> dev->ata_dev.sector_size_shift;
}
static storage_poll_t atapi_poll(storage_dev_t *const _dev)
{
atapi_dev_t *const dev = (atapi_dev_t *)_dev;
u8 cdb[12] = { 0, };
u8 capacity[8];
if (dev->medium_present)
return POLL_MEDIUM_PRESENT;
cdb[0] = ATAPI_TEST_UNIT_READY;
const int ret = atapi_packet_read_cmd(dev, cdb, sizeof(cdb), NULL, 0);
if (!ret) {
printf("atapi: Found medium.\n");
dev->medium_present = 1;
} else if (dev->medium_present) {
return POLL_ERROR;
}
if (dev->medium_present) {
cdb[0] = ATAPI_START_STOP_UNIT;
cdb[4] = 0x01; /* Start Disc, read TOC. */
if (atapi_packet_read_cmd(dev, cdb, sizeof(cdb), NULL, 0))
goto _error_ret;
cdb[4] = 0x00;
}
cdb[0] = ATAPI_PREVENT_ALLOW_MEDIUM_REMOVAL;
cdb[2] = 0x02; /* Clear persistent prevent removal bit. */
atapi_packet_read_cmd(dev, cdb, sizeof(cdb), NULL, 0);
cdb[2] = 0x00; /* Clear prevent removal bit. */
atapi_packet_read_cmd(dev, cdb, sizeof(cdb), NULL, 0);
/* If we don't have a medium, we're done. */
if (!dev->medium_present)
return POLL_NO_MEDIUM;
/* Read capacity and sector size. */
cdb[0] = ATAPI_READ_CAPACITY;
if (atapi_packet_read_cmd(dev, cdb, sizeof(cdb),
(u8 *)capacity, sizeof(capacity))
!= sizeof(capacity))
goto _error_ret;
const u32 sector_size = (capacity[4] << 24) |
(capacity[5] << 16) |
(capacity[6] << 8) |
(capacity[7] << 0);
if (ata_set_sector_size(&dev->ata_dev, sector_size)) {
dev->medium_present = 0;
return POLL_MEDIUM_ERROR;
}
return POLL_MEDIUM_PRESENT;
_error_ret:
dev->medium_present = 0;
return POLL_ERROR;
}
int atapi_attach_device(atapi_dev_t *const dev, const storage_port_t port_type)
{
u16 id[256];
dev->ata_dev.identify_cmd = ATA_IDENTIFY_PACKET_DEVICE;
if (dev->identify(&dev->ata_dev, (u8 *)id))
return -1;
char fw[9], model[41];
ata_strncpy(fw, id + 23, sizeof(fw));
ata_strncpy(model, id + 27, sizeof(model));
printf("atapi: Identified %s [%s]\n", model, fw);
/* Initialize to sane values. */
dev->ata_dev.sector_size = 2048;
dev->ata_dev.sector_size_shift = 11;
dev->medium_present = 0;
/* Reuse ata procedures. */
ata_initialize_storage_ops(&dev->ata_dev);
dev->ata_dev.read_sectors = atapi_packet_read_sectors;
dev->ata_dev.storage_dev.port_type = port_type;
dev->ata_dev.storage_dev.poll = atapi_poll;
return storage_attach_device(&dev->ata_dev.storage_dev);
}
|
