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
|
/*
* This file is part of the flashrom project.
*
* Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
* Copyright (C) 2011 Jonathan Kollasch <jakllsch@kollasch.net>
* Copyright (C) 2012-2013 Stefan Tauner
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <stdlib.h>
#include <string.h>
#include "flash.h"
#include "programmer.h"
#include "platform/pci.h"
#define PCI_VENDOR_ID_VIA 0x1106
#define VIA_MAX_RETRIES 300
#define BROM_ADDR 0x60
#define BROM_DATA 0x64
#define BROM_ACCESS 0x68
#define BROM_TRIGGER 0x80
#define BROM_WRITE 0x40
#define BROM_SIZE_MASK 0x30
#define BROM_SIZE_64K 0x00
#define BROM_SIZE_32K 0x10
#define BROM_SIZE_16K 0x20
#define BROM_SIZE_0K 0x30
#define BROM_BYTE_ENABLE_MASK 0x0f
#define BROM_STATUS 0x69
#define BROM_ERROR_STATUS 0x80
/* Select the byte we want to access. This is done by clearing the bit corresponding to the byte we want to
* access, leaving the others set (yes, really). */
#define ENABLE_BYTE(address) ((~(1 << ((address) & 3))) & BROM_BYTE_ENABLE_MASK)
#define BYTE_OFFSET(address) (((address) & 3) * 8)
static const struct dev_entry ata_via[] = {
{PCI_VENDOR_ID_VIA, 0x3249, DEP, "VIA", "VT6421A"},
{0},
};
static void *atavia_offset = NULL;
static struct pci_dev *dev = NULL;
static void atavia_prettyprint_access(uint8_t access)
{
uint8_t bmask = access & BROM_BYTE_ENABLE_MASK;
uint8_t size = access & BROM_SIZE_MASK;
msg_pspew("Accessing byte(s):%s%s%s%s\n",
((bmask & (1<<3)) == 0) ? " 3" : "",
((bmask & (1<<2)) == 0) ? " 2" : "",
((bmask & (1<<1)) == 0) ? " 1" : "",
((bmask & (1<<0)) == 0) ? " 0" : "");
if (size == BROM_SIZE_0K) {
msg_pspew("No ROM device found.\n");
} else
msg_pspew("ROM device with %s kB attached.\n",
(size == BROM_SIZE_64K) ? ">=64" :
(size == BROM_SIZE_32K) ? "32" : "16");
msg_pspew("Access is a %s.\n", (access & BROM_WRITE) ? "write" : "read");
msg_pspew("Device is %s.\n", (access & BROM_TRIGGER) ? "busy" : "ready");
}
static bool atavia_ready(struct pci_dev *pcidev_dev)
{
int try;
uint8_t access, status;
bool ready = false;
for (try = 0; try < VIA_MAX_RETRIES; try++) {
access = pci_read_byte(pcidev_dev, BROM_ACCESS);
status = pci_read_byte(pcidev_dev, BROM_STATUS);
if (((access & BROM_TRIGGER) == 0) && (status & BROM_ERROR_STATUS) == 0) {
ready = true;
break;
} else {
programmer_delay(1);
continue;
}
}
msg_pdbg2("\n%s: %s after %d tries (access=0x%02x, status=0x%02x)\n",
__func__, ready ? "succeeded" : "failed", try, access, status);
atavia_prettyprint_access(access);
return ready;
}
static void *atavia_map(const char *descr, uintptr_t phys_addr, size_t len)
{
return (atavia_offset != 0) ? atavia_offset : (void *)phys_addr;
}
static void atavia_chip_writeb(const struct flashctx *flash, uint8_t val, const chipaddr addr)
{
msg_pspew("%s: 0x%02x to 0x%*" PRIxPTR ".\n", __func__, val, PRIxPTR_WIDTH, addr);
pci_write_long(dev, BROM_ADDR, (addr & ~3));
pci_write_long(dev, BROM_DATA, val << BYTE_OFFSET(addr));
pci_write_byte(dev, BROM_ACCESS, BROM_TRIGGER | BROM_WRITE | ENABLE_BYTE(addr));
if (!atavia_ready(dev)) {
msg_perr("not ready after write\n");
}
}
static uint8_t atavia_chip_readb(const struct flashctx *flash, const chipaddr addr)
{
pci_write_long(dev, BROM_ADDR, (addr & ~3));
pci_write_byte(dev, BROM_ACCESS, BROM_TRIGGER | ENABLE_BYTE(addr));
if (!atavia_ready(dev)) {
msg_perr("not ready after read\n");
}
uint8_t val = (pci_read_long(dev, BROM_DATA) >> BYTE_OFFSET(addr)) & 0xff;
msg_pspew("%s: 0x%02x from 0x%*" PRIxPTR ".\n", __func__, val, PRIxPTR_WIDTH, addr);
return val;
}
static const struct par_master lpc_master_atavia = {
.chip_readb = atavia_chip_readb,
.chip_readw = fallback_chip_readw,
.chip_readl = fallback_chip_readl,
.chip_readn = fallback_chip_readn,
.chip_writeb = atavia_chip_writeb,
.chip_writew = fallback_chip_writew,
.chip_writel = fallback_chip_writel,
.chip_writen = fallback_chip_writen,
};
static int atavia_init(void)
{
char *arg = extract_programmer_param("offset");
if (arg) {
if (strlen(arg) == 0) {
msg_perr("Missing argument for offset.\n");
free(arg);
return ERROR_FATAL;
}
char *endptr;
atavia_offset = (void *)strtoul(arg, &endptr, 0);
if (*endptr) {
msg_perr("Error: Invalid offset specified: \"%s\".\n", arg);
free(arg);
return ERROR_FATAL;
}
msg_pinfo("Mapping addresses to base %p.\n", atavia_offset);
}
free(arg);
dev = pcidev_init(ata_via, PCI_ROM_ADDRESS); /* Actually no BAR setup needed at all. */
if (!dev)
return 1;
/* Test if a flash chip is attached. */
pci_write_long(dev, PCI_ROM_ADDRESS, (uint32_t)PCI_ROM_ADDRESS_MASK);
programmer_delay(90);
uint32_t base = pci_read_long(dev, PCI_ROM_ADDRESS);
msg_pdbg2("BROM base=0x%08x\n", base);
if ((base & PCI_ROM_ADDRESS_MASK) == 0) {
msg_pwarn("Controller thinks there is no ROM attached.\n");
}
if (!atavia_ready(dev)) {
msg_perr("Controller not ready.\n");
return 1;
}
return register_par_master(&lpc_master_atavia, BUS_LPC, NULL);
}
const struct programmer_entry programmer_atavia = {
.name = "atavia",
.type = PCI,
.devs.dev = ata_via,
.init = atavia_init,
.map_flash_region = atavia_map,
.unmap_flash_region = fallback_unmap,
.delay = internal_delay,
};
|
