276 lines
6.3 KiB
C
276 lines
6.3 KiB
C
/* Copyright 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.
|
|
*/
|
|
|
|
/* GPIO common functionality for Chrome EC */
|
|
|
|
#include "common.h"
|
|
#include "console.h"
|
|
#include "gpio.h"
|
|
#include "host_command.h"
|
|
#include "system.h"
|
|
#include "util.h"
|
|
|
|
static uint8_t last_val[(GPIO_COUNT + 7) / 8];
|
|
|
|
/**
|
|
* Find a GPIO signal by name.
|
|
*
|
|
* @param name Signal name to find
|
|
*
|
|
* @return the signal index, or GPIO_COUNT if no match.
|
|
*/
|
|
static enum gpio_signal find_signal_by_name(const char *name)
|
|
{
|
|
int i;
|
|
|
|
if (!name || !*name)
|
|
return GPIO_COUNT;
|
|
|
|
for (i = 0; i < GPIO_COUNT; i++)
|
|
if (gpio_is_implemented(i) &&
|
|
!strcasecmp(name, gpio_get_name(i)))
|
|
return i;
|
|
|
|
return GPIO_COUNT;
|
|
}
|
|
|
|
/**
|
|
* Update last_val
|
|
*
|
|
* @param i Index of last_val[] to update
|
|
* @param v New value for last_val[i]
|
|
*
|
|
* @return 1 if last_val[i] was updated, 0 if last_val[i]==v.
|
|
*/
|
|
static int last_val_changed(int i, int v)
|
|
{
|
|
if (v && !(last_val[i / 8] & (1 << (i % 8)))) {
|
|
last_val[i / 8] |= 1 << (i % 8);
|
|
return 1;
|
|
} else if (!v && last_val[i / 8] & (1 << (i % 8))) {
|
|
last_val[i / 8] &= ~(1 << (i % 8));
|
|
return 1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static enum ec_error_list set(const char *name, int value)
|
|
{
|
|
enum gpio_signal signal = find_signal_by_name(name);
|
|
|
|
if (signal == GPIO_COUNT)
|
|
return EC_ERROR_INVAL;
|
|
|
|
if (!gpio_is_implemented(signal))
|
|
return EC_ERROR_INVAL;
|
|
|
|
if (!(gpio_get_default_flags(signal) & GPIO_OUTPUT))
|
|
return EC_ERROR_INVAL;
|
|
|
|
gpio_set_level(signal, value);
|
|
|
|
return EC_SUCCESS;
|
|
}
|
|
/*****************************************************************************/
|
|
/* Console commands */
|
|
|
|
static void print_gpio_info(int gpio)
|
|
{
|
|
int changed, v, flags;
|
|
|
|
if (!gpio_is_implemented(gpio))
|
|
return; /* Skip unsupported signals */
|
|
|
|
v = gpio_get_level(gpio);
|
|
#ifdef CONFIG_CMD_GPIO_EXTENDED
|
|
flags = gpio_get_flags(gpio);
|
|
#else
|
|
flags = 0;
|
|
#endif
|
|
changed = last_val_changed(gpio, v);
|
|
|
|
ccprintf(" %d%c %s%s%s%s%s%s%s%s%s%s%s%s\n", v,
|
|
(changed ? '*' : ' '),
|
|
(flags & GPIO_INPUT ? "I " : ""),
|
|
(flags & GPIO_OUTPUT ? "O " : ""),
|
|
(flags & GPIO_LOW ? "L " : ""),
|
|
(flags & GPIO_HIGH ? "H " : ""),
|
|
(flags & GPIO_ANALOG ? "A " : ""),
|
|
(flags & GPIO_OPEN_DRAIN ? "ODR " : ""),
|
|
(flags & GPIO_PULL_UP ? "PU " : ""),
|
|
(flags & GPIO_PULL_DOWN ? "PD " : ""),
|
|
(flags & GPIO_ALTERNATE ? "ALT " : ""),
|
|
(flags & GPIO_SEL_1P8V ? "1P8 " : ""),
|
|
(flags & GPIO_LOCKED ? "LCK " : ""),
|
|
gpio_get_name(gpio));
|
|
|
|
/* Flush console to avoid truncating output */
|
|
cflush();
|
|
}
|
|
|
|
static int command_gpio_get(int argc, char **argv)
|
|
{
|
|
int i;
|
|
|
|
/* If a signal is specified, print only that one */
|
|
if (argc == 2) {
|
|
i = find_signal_by_name(argv[1]);
|
|
if (i == GPIO_COUNT)
|
|
return EC_ERROR_PARAM1;
|
|
print_gpio_info(i);
|
|
|
|
return EC_SUCCESS;
|
|
}
|
|
|
|
/* Otherwise print them all */
|
|
for (i = 0; i < GPIO_COUNT; i++) {
|
|
if (!gpio_is_implemented(i))
|
|
continue; /* Skip unsupported signals */
|
|
|
|
print_gpio_info(i);
|
|
}
|
|
|
|
return EC_SUCCESS;
|
|
}
|
|
DECLARE_SAFE_CONSOLE_COMMAND(gpioget, command_gpio_get,
|
|
"[name]",
|
|
"Read GPIO value(s)");
|
|
|
|
static int command_gpio_set(int argc, char **argv)
|
|
{
|
|
#ifdef CONFIG_CMD_GPIO_EXTENDED
|
|
int gpio;
|
|
int flags = 0;
|
|
int af = -1;
|
|
char *e;
|
|
|
|
if (argc < 3)
|
|
return EC_ERROR_PARAM_COUNT;
|
|
|
|
gpio = find_signal_by_name(argv[1]);
|
|
if (gpio == GPIO_COUNT)
|
|
return EC_ERROR_PARAM1;
|
|
|
|
if (strcasecmp(argv[2], "IN") == 0)
|
|
flags = GPIO_INPUT;
|
|
else if (strcasecmp(argv[2], "1") == 0)
|
|
flags = GPIO_OUT_HIGH;
|
|
else if (strcasecmp(argv[2], "0") == 0)
|
|
flags = GPIO_OUT_LOW;
|
|
else if (strcasecmp(argv[2], "A") == 0)
|
|
flags = GPIO_ANALOG;
|
|
else if (strcasecmp(argv[2], "ALT") == 0) {
|
|
if (argc >= 4) {
|
|
af = strtoi(argv[3], &e, 0);
|
|
if (*e || af < 0 || af > 5)
|
|
return EC_ERROR_PARAM2;
|
|
}
|
|
flags = GPIO_ALTERNATE;
|
|
} else
|
|
return EC_ERROR_PARAM2;
|
|
|
|
/* Update alt function if requested. */
|
|
if (af >= 0) {
|
|
const struct gpio_info *g = gpio_list + gpio;
|
|
|
|
gpio_set_alternate_function(g->port, g->mask, af);
|
|
}
|
|
/* Update GPIO flags. */
|
|
gpio_set_flags(gpio, flags);
|
|
#else
|
|
char *e;
|
|
int v;
|
|
|
|
if (argc < 3)
|
|
return EC_ERROR_PARAM_COUNT;
|
|
|
|
v = strtoi(argv[2], &e, 0);
|
|
if (*e)
|
|
return EC_ERROR_PARAM2;
|
|
|
|
if (set(argv[1], v) != EC_SUCCESS)
|
|
return EC_ERROR_PARAM1;
|
|
#endif
|
|
return EC_SUCCESS;
|
|
}
|
|
DECLARE_CONSOLE_COMMAND(gpioset, command_gpio_set,
|
|
#ifdef CONFIG_CMD_GPIO_EXTENDED
|
|
"name <0 | 1 | IN | A | ALT [func]>",
|
|
#else
|
|
"name <0 | 1>",
|
|
#endif
|
|
"Set a GPIO");
|
|
|
|
/*****************************************************************************/
|
|
/* Host commands */
|
|
|
|
static enum ec_status gpio_command_get(struct host_cmd_handler_args *args)
|
|
{
|
|
const struct ec_params_gpio_get_v1 *p_v1 = args->params;
|
|
struct ec_response_gpio_get_v1 *r_v1 = args->response;
|
|
int i, len;
|
|
|
|
if (args->version == 0) {
|
|
const struct ec_params_gpio_get *p = args->params;
|
|
struct ec_response_gpio_get *r = args->response;
|
|
|
|
i = find_signal_by_name(p->name);
|
|
if (i == GPIO_COUNT)
|
|
return EC_RES_ERROR;
|
|
|
|
r->val = gpio_get_level(i);
|
|
args->response_size = sizeof(struct ec_response_gpio_get);
|
|
return EC_RES_SUCCESS;
|
|
}
|
|
|
|
switch (p_v1->subcmd) {
|
|
case EC_GPIO_GET_BY_NAME:
|
|
i = find_signal_by_name(p_v1->get_value_by_name.name);
|
|
if (i == GPIO_COUNT)
|
|
return EC_RES_ERROR;
|
|
|
|
r_v1->get_value_by_name.val = gpio_get_level(i);
|
|
args->response_size = sizeof(r_v1->get_value_by_name);
|
|
break;
|
|
case EC_GPIO_GET_COUNT:
|
|
r_v1->get_count.val = GPIO_COUNT;
|
|
args->response_size = sizeof(r_v1->get_count);
|
|
break;
|
|
case EC_GPIO_GET_INFO:
|
|
if (p_v1->get_info.index >= GPIO_COUNT)
|
|
return EC_RES_ERROR;
|
|
|
|
i = p_v1->get_info.index;
|
|
len = strlen(gpio_get_name(i));
|
|
memcpy(r_v1->get_info.name, gpio_get_name(i), len+1);
|
|
r_v1->get_info.val = gpio_get_level(i);
|
|
r_v1->get_info.flags = gpio_get_default_flags(i);
|
|
args->response_size = sizeof(r_v1->get_info);
|
|
break;
|
|
default:
|
|
return EC_RES_INVALID_PARAM;
|
|
}
|
|
|
|
return EC_RES_SUCCESS;
|
|
|
|
}
|
|
DECLARE_HOST_COMMAND(EC_CMD_GPIO_GET, gpio_command_get,
|
|
EC_VER_MASK(0) | EC_VER_MASK(1));
|
|
|
|
static enum ec_status gpio_command_set(struct host_cmd_handler_args *args)
|
|
{
|
|
const struct ec_params_gpio_set *p = args->params;
|
|
|
|
if (system_is_locked())
|
|
return EC_RES_ACCESS_DENIED;
|
|
|
|
if (set(p->name, p->val) != EC_SUCCESS)
|
|
return EC_RES_ERROR;
|
|
|
|
return EC_RES_SUCCESS;
|
|
}
|
|
DECLARE_HOST_COMMAND(EC_CMD_GPIO_SET, gpio_command_set, EC_VER_MASK(0));
|