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
|
/* $OpenBSD: cardbus_exrom.c,v 1.7 2015/08/28 00:03:53 deraadt Exp $ */
/* $NetBSD: cardbus_exrom.c,v 1.4 2000/02/03 06:47:31 thorpej Exp $ */
/*
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to
* The NetBSD Foundation by Johan Danielsson.
*
* 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.
*
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <sys/param.h>
#include <sys/systm.h>
#include <sys/queue.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <dev/cardbus/cardbus_exrom.h>
#if defined(CARDBUS_DEBUG)
#define DPRINTF(a) printf a
#else
#define DPRINTF(a)
#endif
#define READ_INT16(T, H, O) \
(bus_space_read_1((T), (H), (O)) | \
(bus_space_read_1((T), (H), (O) + 1) << 8))
/*
* A PCI ROM is divided into a number of images. Each image has two
* data structures, a header located at the start of the image, and a
* `data structure' at some offset into it.
*
* The header is a 26 byte structure:
*
* Offset Length Description
* 0x00 1 signature byte 1 (0x55)
* 0x01 1 signature byte 2 (0xAA)
* 0x02 22 processor architecture data
* 0x18 2 pointer to the data structure
*
* The data structure is a 24 byte structure:
*
* Offset Length Description
* 0x00 4 signature (PCIR)
* 0x04 2 vendor id
* 0x06 2 device id
* 0x08 2 reserved
* 0x0A 2 data structure length
* 0x0C 1 data structure revision (0)
* 0x0D 3 class code
* 0x10 2 image length (in 512 byte blocks)
* 0x12 2 code revision level
* 0x14 1 code type
* 0x15 1 indicator (bit 7 indicates final image)
* 0x16 2 reserved
*
*/
/*
* Scan through a PCI expansion ROM, and create subregions for each
* ROM image. This function assumes that the ROM is mapped at
* (tag,handle), and that the expansion ROM address decoder is
* enabled. The PCI specification requires that no other BAR should
* be accessed while the ROM is enabled, so interrupts should be
* disabled.
*
* XXX This routine is way too pessimistic and returns as soon as it encounters
* a problem, although not being able to malloc or read a particular image
* may not prevent further images from being read successfully.
*/
int
cardbus_read_exrom(bus_space_tag_t romt, bus_space_handle_t romh,
struct cardbus_rom_image_head *head)
{
size_t addr = 0; /* offset of current rom image */
size_t dataptr;
unsigned int rom_image = 0;
size_t image_size;
struct cardbus_rom_image *image;
u_int16_t val;
SIMPLEQ_INIT(head);
do {
val = READ_INT16(romt, romh, addr + CARDBUS_EXROM_SIGNATURE);
if (val != 0xaa55) {
DPRINTF(("%s: bad header signature in ROM image "
"%u: 0x%04x\n", __func__, rom_image, val));
return (1);
}
dataptr = addr + READ_INT16(romt, romh,
addr + CARDBUS_EXROM_DATA_PTR);
/* get the ROM image size, in blocks */
image_size = READ_INT16(romt, romh,
dataptr + CARDBUS_EXROM_DATA_IMAGE_LENGTH);
/* XXX
* Some ROMs seem to have this as zero, can we assume
* this means 1 block?
*/
if (image_size == 0)
image_size = 1;
image_size <<= 9;
image = malloc(sizeof(*image), M_DEVBUF, M_NOWAIT);
if (image == NULL) {
DPRINTF(("%s: out of memory\n", __func__));
return (1);
}
image->rom_image = rom_image;
image->image_size = image_size;
image->romt = romt;
if (bus_space_subregion(romt, romh, addr,
image_size, &image->romh)) {
DPRINTF(("%s: bus_space_subregion failed", __func__));
free(image, M_DEVBUF, sizeof(*image));
return (1);
}
SIMPLEQ_INSERT_TAIL(head, image, next);
addr += image_size;
rom_image++;
} while ((bus_space_read_1(romt, romh,
dataptr + CARDBUS_EXROM_DATA_INDICATOR) & 0x80) == 0);
return (0);
}
|
