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
|
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "common.h"
#include "console.h"
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "pwm.h"
#include "util.h"
#ifdef CONFIG_PWM
/*
* Get target channel based on type / index host command parameters.
* Returns 0 if a valid channel is selected, -1 on error.
*/
static int get_target_channel(enum pwm_channel *channel, int type, int index)
{
switch (type) {
case EC_PWM_TYPE_GENERIC:
*channel = index;
break;
#ifdef CONFIG_PWM_KBLIGHT
case EC_PWM_TYPE_KB_LIGHT:
*channel = PWM_CH_KBLIGHT;
break;
#endif
#ifdef CONFIG_PWM_DISPLIGHT
case EC_PWM_TYPE_DISPLAY_LIGHT:
*channel = PWM_CH_DISPLIGHT;
break;
#endif
default:
return -1;
}
return *channel >= PWM_CH_COUNT;
}
__attribute__((weak)) void pwm_set_raw_duty(enum pwm_channel ch, uint16_t duty)
{
int percent;
/* Convert 16 bit duty to percent on [0, 100] */
percent = DIV_ROUND_NEAREST((uint32_t)duty * 100, 65535);
pwm_set_duty(ch, percent);
}
__attribute__((weak)) uint16_t pwm_get_raw_duty(enum pwm_channel ch)
{
return (pwm_get_duty(ch) * 65535) / 100;
}
static int host_command_pwm_set_duty(struct host_cmd_handler_args *args)
{
const struct ec_params_pwm_set_duty *p = args->params;
enum pwm_channel channel;
if (get_target_channel(&channel, p->pwm_type, p->index))
return EC_RES_INVALID_PARAM;
pwm_set_raw_duty(channel, p->duty);
pwm_enable(channel, p->duty > 0);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_PWM_SET_DUTY,
host_command_pwm_set_duty,
EC_VER_MASK(0));
static int host_command_pwm_get_duty(struct host_cmd_handler_args *args)
{
const struct ec_params_pwm_get_duty *p = args->params;
struct ec_response_pwm_get_duty *r = args->response;
enum pwm_channel channel;
if (get_target_channel(&channel, p->pwm_type, p->index))
return EC_RES_INVALID_PARAM;
r->duty = pwm_get_raw_duty(channel);
args->response_size = sizeof(*r);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_PWM_GET_DUTY,
host_command_pwm_get_duty,
EC_VER_MASK(0));
/**
* Print status of a PWM channel.
*
* @param ch Channel to print.
*/
static void print_channel(enum pwm_channel ch, int max_duty)
{
if (pwm_get_enabled(ch))
if (max_duty == 100)
ccprintf(" %d: %d%%\n", ch, pwm_get_duty(ch));
else
ccprintf(" %d: %d\n", ch, pwm_get_raw_duty(ch));
else
ccprintf(" %d: disabled\n", ch);
}
static int cc_pwm_duty(int argc, char **argv)
{
int value = 0;
int max_duty = 100;
int ch;
char *e;
char *raw;
if (argc < 2) {
ccprintf("PWM channels:\n");
for (ch = 0; ch < PWM_CH_COUNT; ch++)
print_channel(ch, max_duty);
return EC_SUCCESS;
}
ch = strtoi(argv[1], &e, 0);
if (*e || ch < 0 || ch >= PWM_CH_COUNT)
return EC_ERROR_PARAM1;
if (argc > 2) {
raw = argv[2];
if (!strcasecmp(raw, "raw")) {
/* use raw duty */
value = strtoi(argv[3], &e, 0);
max_duty = EC_PWM_MAX_DUTY;
} else {
/* use percent duty */
value = strtoi(argv[2], &e, 0);
max_duty = 100;
}
if (*e || value > max_duty) {
/* Bad param */
return EC_ERROR_PARAM2;
} else if (value < 0) {
/* Negative = disable */
pwm_enable(ch, 0);
} else {
ccprintf("Setting channel %d to %d\n", ch, value);
pwm_enable(ch, 1);
(max_duty == 100) ? pwm_set_duty(ch, value) :
pwm_set_raw_duty(ch, value);
}
}
print_channel(ch, max_duty);
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(pwmduty, cc_pwm_duty,
"[channel [<percent> | -1=disable] | [raw <value>]]",
"Get/set PWM duty cycles ");
#endif /* CONFIG_PWM */
/* Initialize all PWM pins as functional */
static void pwm_pin_init(void)
{
gpio_config_module(MODULE_PWM, 1);
}
/* HOOK_PRIO_INIT_PWM may be used for chip PWM unit init, so use PRIO + 1 */
DECLARE_HOOK(HOOK_INIT, pwm_pin_init, HOOK_PRIO_INIT_PWM + 1);
|
