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
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
|
// SPDX-License-Identifier: GPL-2.0+
/*
* PC-Engines APUv2/APUv3 board platform driver
* for GPIO buttons and LEDs
*
* Copyright (C) 2018 metux IT consult
* Author: Enrico Weigelt <info@metux.net>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/dmi.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/gpio_keys.h>
#include <linux/gpio/machine.h>
#include <linux/input.h>
#include <linux/platform_data/gpio/gpio-amd-fch.h>
/*
* NOTE: this driver only supports APUv2/3 - not APUv1, as this one
* has completely different register layouts.
*/
/* Register mappings */
#define APU2_GPIO_REG_LED1 AMD_FCH_GPIO_REG_GPIO57
#define APU2_GPIO_REG_LED2 AMD_FCH_GPIO_REG_GPIO58
#define APU2_GPIO_REG_LED3 AMD_FCH_GPIO_REG_GPIO59_DEVSLP1
#define APU2_GPIO_REG_MODESW AMD_FCH_GPIO_REG_GPIO32_GE1
#define APU2_GPIO_REG_SIMSWAP AMD_FCH_GPIO_REG_GPIO33_GE2
#define APU2_GPIO_REG_MPCIE2 AMD_FCH_GPIO_REG_GPIO55_DEVSLP0
#define APU2_GPIO_REG_MPCIE3 AMD_FCH_GPIO_REG_GPIO51
/* Order in which the GPIO lines are defined in the register list */
#define APU2_GPIO_LINE_LED1 0
#define APU2_GPIO_LINE_LED2 1
#define APU2_GPIO_LINE_LED3 2
#define APU2_GPIO_LINE_MODESW 3
#define APU2_GPIO_LINE_SIMSWAP 4
#define APU2_GPIO_LINE_MPCIE2 5
#define APU2_GPIO_LINE_MPCIE3 6
/* GPIO device */
static int apu2_gpio_regs[] = {
[APU2_GPIO_LINE_LED1] = APU2_GPIO_REG_LED1,
[APU2_GPIO_LINE_LED2] = APU2_GPIO_REG_LED2,
[APU2_GPIO_LINE_LED3] = APU2_GPIO_REG_LED3,
[APU2_GPIO_LINE_MODESW] = APU2_GPIO_REG_MODESW,
[APU2_GPIO_LINE_SIMSWAP] = APU2_GPIO_REG_SIMSWAP,
[APU2_GPIO_LINE_MPCIE2] = APU2_GPIO_REG_MPCIE2,
[APU2_GPIO_LINE_MPCIE3] = APU2_GPIO_REG_MPCIE3,
};
static const char * const apu2_gpio_names[] = {
[APU2_GPIO_LINE_LED1] = "front-led1",
[APU2_GPIO_LINE_LED2] = "front-led2",
[APU2_GPIO_LINE_LED3] = "front-led3",
[APU2_GPIO_LINE_MODESW] = "front-button",
[APU2_GPIO_LINE_SIMSWAP] = "simswap",
[APU2_GPIO_LINE_MPCIE2] = "mpcie2_reset",
[APU2_GPIO_LINE_MPCIE3] = "mpcie3_reset",
};
static const struct amd_fch_gpio_pdata board_apu2 = {
.gpio_num = ARRAY_SIZE(apu2_gpio_regs),
.gpio_reg = apu2_gpio_regs,
.gpio_names = apu2_gpio_names,
};
/* GPIO LEDs device */
static const struct gpio_led apu2_leds[] = {
{ .name = "apu:green:1" },
{ .name = "apu:green:2" },
{ .name = "apu:green:3" },
};
static const struct gpio_led_platform_data apu2_leds_pdata = {
.num_leds = ARRAY_SIZE(apu2_leds),
.leds = apu2_leds,
};
static struct gpiod_lookup_table gpios_led_table = {
.dev_id = "leds-gpio",
.table = {
GPIO_LOOKUP_IDX(AMD_FCH_GPIO_DRIVER_NAME, APU2_GPIO_LINE_LED1,
NULL, 0, GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX(AMD_FCH_GPIO_DRIVER_NAME, APU2_GPIO_LINE_LED2,
NULL, 1, GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX(AMD_FCH_GPIO_DRIVER_NAME, APU2_GPIO_LINE_LED3,
NULL, 2, GPIO_ACTIVE_LOW),
{} /* Terminating entry */
}
};
/* GPIO keyboard device */
static struct gpio_keys_button apu2_keys_buttons[] = {
{
.code = KEY_RESTART,
.active_low = 1,
.desc = "front button",
.type = EV_KEY,
.debounce_interval = 10,
.value = 1,
},
};
static const struct gpio_keys_platform_data apu2_keys_pdata = {
.buttons = apu2_keys_buttons,
.nbuttons = ARRAY_SIZE(apu2_keys_buttons),
.poll_interval = 100,
.rep = 0,
.name = "apu2-keys",
};
static struct gpiod_lookup_table gpios_key_table = {
.dev_id = "gpio-keys-polled",
.table = {
GPIO_LOOKUP_IDX(AMD_FCH_GPIO_DRIVER_NAME, APU2_GPIO_LINE_MODESW,
NULL, 0, GPIO_ACTIVE_LOW),
{} /* Terminating entry */
}
};
/* Board setup */
/* Note: matching works on string prefix, so "apu2" must come before "apu" */
static const struct dmi_system_id apu_gpio_dmi_table[] __initconst = {
/* APU2 w/ legacy BIOS < 4.0.8 */
{
.ident = "apu2",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
DMI_MATCH(DMI_BOARD_NAME, "APU2")
},
.driver_data = (void *)&board_apu2,
},
/* APU2 w/ legacy BIOS >= 4.0.8 */
{
.ident = "apu2",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
DMI_MATCH(DMI_BOARD_NAME, "apu2")
},
.driver_data = (void *)&board_apu2,
},
/* APU2 w/ mainline BIOS */
{
.ident = "apu2",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
DMI_MATCH(DMI_BOARD_NAME, "PC Engines apu2")
},
.driver_data = (void *)&board_apu2,
},
/* APU3 w/ legacy BIOS < 4.0.8 */
{
.ident = "apu3",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
DMI_MATCH(DMI_BOARD_NAME, "APU3")
},
.driver_data = (void *)&board_apu2,
},
/* APU3 w/ legacy BIOS >= 4.0.8 */
{
.ident = "apu3",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
DMI_MATCH(DMI_BOARD_NAME, "apu3")
},
.driver_data = (void *)&board_apu2,
},
/* APU3 w/ mainline BIOS */
{
.ident = "apu3",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
DMI_MATCH(DMI_BOARD_NAME, "PC Engines apu3")
},
.driver_data = (void *)&board_apu2,
},
/* APU4 w/ legacy BIOS < 4.0.8 */
{
.ident = "apu4",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
DMI_MATCH(DMI_BOARD_NAME, "APU4")
},
.driver_data = (void *)&board_apu2,
},
/* APU4 w/ legacy BIOS >= 4.0.8 */
{
.ident = "apu4",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
DMI_MATCH(DMI_BOARD_NAME, "apu4")
},
.driver_data = (void *)&board_apu2,
},
/* APU4 w/ mainline BIOS */
{
.ident = "apu4",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
DMI_MATCH(DMI_BOARD_NAME, "PC Engines apu4")
},
.driver_data = (void *)&board_apu2,
},
{}
};
static struct platform_device *apu_gpio_pdev;
static struct platform_device *apu_leds_pdev;
static struct platform_device *apu_keys_pdev;
static struct platform_device * __init apu_create_pdev(
const char *name,
const void *pdata,
size_t sz)
{
struct platform_device *pdev;
pdev = platform_device_register_resndata(NULL,
name,
PLATFORM_DEVID_NONE,
NULL,
0,
pdata,
sz);
if (IS_ERR(pdev))
pr_err("failed registering %s: %ld\n", name, PTR_ERR(pdev));
return pdev;
}
static int __init apu_board_init(void)
{
const struct dmi_system_id *id;
id = dmi_first_match(apu_gpio_dmi_table);
if (!id) {
pr_err("failed to detect APU board via DMI\n");
return -ENODEV;
}
gpiod_add_lookup_table(&gpios_led_table);
gpiod_add_lookup_table(&gpios_key_table);
apu_gpio_pdev = apu_create_pdev(
AMD_FCH_GPIO_DRIVER_NAME,
id->driver_data,
sizeof(struct amd_fch_gpio_pdata));
apu_leds_pdev = apu_create_pdev(
"leds-gpio",
&apu2_leds_pdata,
sizeof(apu2_leds_pdata));
apu_keys_pdev = apu_create_pdev(
"gpio-keys-polled",
&apu2_keys_pdata,
sizeof(apu2_keys_pdata));
return 0;
}
static void __exit apu_board_exit(void)
{
gpiod_remove_lookup_table(&gpios_led_table);
gpiod_remove_lookup_table(&gpios_key_table);
platform_device_unregister(apu_keys_pdev);
platform_device_unregister(apu_leds_pdev);
platform_device_unregister(apu_gpio_pdev);
}
module_init(apu_board_init);
module_exit(apu_board_exit);
MODULE_AUTHOR("Enrico Weigelt, metux IT consult <info@metux.net>");
MODULE_DESCRIPTION("PC Engines APUv2/APUv3 board GPIO/LEDs/keys driver");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(dmi, apu_gpio_dmi_table);
MODULE_SOFTDEP("pre: platform:" AMD_FCH_GPIO_DRIVER_NAME " platform:leds-gpio platform:gpio_keys_polled");
|
