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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
|
/*
* This file is part of the coreboot project.
*
* 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 <superio/common/ssdt.h>
#include <device/device.h>
#include <device/pnp.h>
#include <arch/acpigen.h>
#include <arch/acpi.h>
#include <device/pnp_def.h>
#include <console/console.h>
#include <types.h>
struct superio_dev {
const char *acpi_hid;
u16 io_base[4];
u8 irq[2];
};
static const struct superio_dev superio_devs[] = {
{ACPI_HID_FDC, {0x3f0, 0x3f2, 0x3f7}, {6, } },
{ACPI_HID_KEYBOARD, {60, 64, }, {1, } },
{ACPI_HID_MOUSE, {60, 64, }, {12, } },
{ACPI_HID_COM, {0x3f8, 0x2f8, 0x3e8, 0x2e8}, {4, 3} },
{ACPI_HID_LPT, {0x378, }, {7, } },
};
static const u8 io_idx[] = {PNP_IDX_IO0, PNP_IDX_IO1, PNP_IDX_IO2, PNP_IDX_IO3};
static const u8 irq_idx[] = {PNP_IDX_IRQ0, PNP_IDX_IRQ1};
static const struct superio_dev *superio_guess_function(struct device *dev)
{
for (size_t i = 0; i < ARRAY_SIZE(io_idx); i++) {
struct resource *res = probe_resource(dev, io_idx[i]);
if (!res || !res->base)
continue;
for (size_t j = 0; j < ARRAY_SIZE(superio_devs); j++) {
for (size_t k = 0; k < 4; k++) {
if (!superio_devs[j].io_base[k])
continue;
if (superio_devs[j].io_base[k] == res->base)
return &superio_devs[j];
}
}
}
for (size_t i = 0; i < ARRAY_SIZE(irq_idx); i++) {
struct resource *res = probe_resource(dev, irq_idx[i]);
if (!res || !res->size)
continue;
for (size_t j = 0; j < ARRAY_SIZE(superio_devs); j++) {
for (size_t k = 0; k < 2; k++) {
if (!superio_devs[j].irq[k])
continue;
if (superio_devs[j].irq[k] == res->base)
return &superio_devs[j];
}
}
}
return NULL;
}
/* Return true if there are resources to report */
static bool has_resources(struct device *dev)
{
for (size_t i = 0; i < ARRAY_SIZE(io_idx); i++) {
struct resource *res = probe_resource(dev, io_idx[i]);
if (!res || !res->base || !res->size)
continue;
return 1;
}
for (size_t i = 0; i < ARRAY_SIZE(irq_idx); i++) {
struct resource *res = probe_resource(dev, irq_idx[i]);
if (!res || !res->size || res->base > 16)
continue;
return 1;
}
return 0;
}
/* Add IO and IRQ resources for _CRS or _PRS */
static void ldn_gen_resources(struct device *dev)
{
uint16_t irq = 0;
for (size_t i = 0; i < ARRAY_SIZE(io_idx); i++) {
struct resource *res = probe_resource(dev, io_idx[i]);
if (!res || !res->base)
continue;
resource_t base = res->base;
resource_t size = res->size;
while (size > 0) {
resource_t sz = size > 255 ? 255 : size;
/* TODO: Needs test with regions >= 256 bytes */
acpigen_write_io16(base, base, 1, sz, 1);
size -= sz;
base += sz;
}
}
for (size_t i = 0; i < ARRAY_SIZE(irq_idx); i++) {
struct resource *res = probe_resource(dev, irq_idx[i]);
if (!res || !res->size || res->base >= 16)
continue;
irq |= 1 << res->base;
}
if (irq)
acpigen_write_irq(irq);
}
/* Add resource base and size for additional SuperIO code */
static void ldn_gen_resources_use(struct device *dev)
{
char name[5];
for (size_t i = 0; i < ARRAY_SIZE(io_idx); i++) {
struct resource *res = probe_resource(dev, io_idx[i]);
if (!res || !res->base || !res->size)
continue;
snprintf(name, sizeof(name), "IO%zXB", i);
name[4] = '\0';
acpigen_write_name_integer(name, res->base);
snprintf(name, sizeof(name), "IO%zXS", i);
name[4] = '\0';
acpigen_write_name_integer(name, res->size);
}
}
const char *superio_common_ldn_acpi_name(const struct device *dev)
{
u8 ldn = dev->path.pnp.device & 0xff;
u8 vldn = (dev->path.pnp.device >> 8) & 0x7;
static char name[5];
snprintf(name, sizeof(name), "L%02X%01X", ldn, vldn);
name[4] = '\0';
return name;
}
static const char *name_from_hid(const char *hid)
{
static const struct {
const char *hid;
const char *name;
} lookup[] = {
{ACPI_HID_FDC, "FDC" },
{ACPI_HID_KEYBOARD, "PS2 Keyboard" },
{ACPI_HID_MOUSE, "PS2 Mouse"},
{ACPI_HID_COM, "COM port" },
{ACPI_HID_LPT, "LPT" },
{ACPI_HID_PNP, "Generic PNP device" },
};
for (size_t i = 0; hid && i < ARRAY_SIZE(lookup); i++) {
if (strcmp(hid, lookup[i].hid) == 0)
return lookup[i].name;
}
return "Generic device";
}
void superio_common_fill_ssdt_generator(struct device *dev)
{
const char *scope = acpi_device_scope(dev);
const char *name = acpi_device_name(dev);
const u8 ldn = dev->path.pnp.device & 0xff;
const u8 vldn = (dev->path.pnp.device >> 8) & 0x7;
const char *hid;
if (!scope || !name) {
printk(BIOS_ERR, "%s: Missing ACPI path/scope\n", dev_path(dev));
return;
}
if (vldn) {
printk(BIOS_DEBUG, "%s: Ignoring virtual LDN\n", dev_path(dev));
return;
}
printk(BIOS_DEBUG, "%s.%s: %s\n", scope, name, dev_path(dev));
/* Scope */
acpigen_write_scope(scope);
/* Device */
acpigen_write_device(name);
acpigen_write_name_byte("_UID", 0);
acpigen_write_name_byte("LDN", ldn);
acpigen_write_name_byte("VLDN", vldn);
acpigen_write_STA(dev->enabled ? 0xf : 0);
if (!dev->enabled) {
acpigen_pop_len(); /* Device */
acpigen_pop_len(); /* Scope */
return;
}
if (has_resources(dev)) {
/* Resources - _CRS */
acpigen_write_name("_CRS");
acpigen_write_resourcetemplate_header();
ldn_gen_resources(dev);
acpigen_write_resourcetemplate_footer();
/* Resources - _PRS */
acpigen_write_name("_PRS");
acpigen_write_resourcetemplate_header();
ldn_gen_resources(dev);
acpigen_write_resourcetemplate_footer();
/* Resources base and size for 3rd party ACPI code */
ldn_gen_resources_use(dev);
}
hid = acpi_device_hid(dev);
if (!hid) {
printk(BIOS_ERR, "%s: SuperIO driver doesn't provide a _HID\n", dev_path(dev));
/* Try to guess it... */
const struct superio_dev *sdev = superio_guess_function(dev);
if (sdev && sdev->acpi_hid) {
hid = sdev->acpi_hid;
printk(BIOS_WARNING, "%s: Guessed _HID is '%s'\n", dev_path(dev), hid);
} else {
hid = ACPI_HID_PNP;
printk(BIOS_ERR, "%s: Failed to guessed _HID\n", dev_path(dev));
}
}
acpigen_write_name_string("_HID", hid);
acpigen_write_name_string("_DDN", name_from_hid(hid));
acpigen_pop_len(); /* Device */
acpigen_pop_len(); /* Scope */
}
|
