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/* 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.
*/
/* Wireless power management */
#include "common.h"
#include "console.h"
#include "gpio.h"
#include "host_command.h"
#include "util.h"
#include "wireless.h"
/* Unless told otherwise, disable wireless in suspend */
#ifndef CONFIG_WIRELESS_SUSPEND
#define CONFIG_WIRELESS_SUSPEND 0
#endif
/*
* Flags which will be left on when suspending. Other flags will be disabled
* when suspending.
*/
static int suspend_flags = CONFIG_WIRELESS_SUSPEND;
/**
* Set wireless switch state.
*
* @param flags Enable flags from ec_commands.h (EC_WIRELESS_SWITCH_*),
* 0 to turn all wireless off, or -1 to turn all wireless
* on.
* @param mask Which of those flags to set
*/
static void wireless_enable(int flags)
{
#ifdef WIRELESS_GPIO_WLAN
gpio_set_level(WIRELESS_GPIO_WLAN,
flags & EC_WIRELESS_SWITCH_WLAN);
#endif
#ifdef WIRELESS_GPIO_WWAN
gpio_set_level(WIRELESS_GPIO_WWAN,
flags & EC_WIRELESS_SWITCH_WWAN);
#endif
#ifdef WIRELESS_GPIO_BLUETOOTH
gpio_set_level(WIRELESS_GPIO_BLUETOOTH,
flags & EC_WIRELESS_SWITCH_BLUETOOTH);
#endif
#ifdef WIRELESS_GPIO_WLAN_POWER
#ifndef CONFIG_WLAN_POWER_ACTIVE_LOW
gpio_set_level(WIRELESS_GPIO_WLAN_POWER,
flags & EC_WIRELESS_SWITCH_WLAN_POWER);
#else
gpio_set_level(WIRELESS_GPIO_WLAN_POWER,
!(flags & EC_WIRELESS_SWITCH_WLAN_POWER));
#endif /* CONFIG_WLAN_POWER_ACTIVE_LOW */
#endif
}
static int wireless_get(void)
{
int flags = 0;
#ifdef WIRELESS_GPIO_WLAN
if (gpio_get_level(WIRELESS_GPIO_WLAN))
flags |= EC_WIRELESS_SWITCH_WLAN;
#endif
#ifdef WIRELESS_GPIO_WWAN
if (gpio_get_level(WIRELESS_GPIO_WWAN))
flags |= EC_WIRELESS_SWITCH_WWAN;
#endif
#ifdef WIRELESS_GPIO_BLUETOOTH
if (gpio_get_level(WIRELESS_GPIO_BLUETOOTH))
flags |= EC_WIRELESS_SWITCH_BLUETOOTH;
#endif
#ifdef WIRELESS_GPIO_WLAN_POWER
#ifndef CONFIG_WLAN_POWER_ACTIVE_LOW
if (gpio_get_level(WIRELESS_GPIO_WLAN_POWER))
#else
if (!gpio_get_level(WIRELESS_GPIO_WLAN_POWER))
#endif /* CONFIG_WLAN_POWER_ACTIVE_LOW */
flags |= EC_WIRELESS_SWITCH_WLAN_POWER;
#endif
return flags;
}
void wireless_set_state(enum wireless_power_state state)
{
switch (state) {
case WIRELESS_OFF:
wireless_enable(0);
break;
case WIRELESS_SUSPEND:
/*
* When suspending, only turn things off. If the AP has
* disabled WiFi power, going into S3 should not re-enable it.
*/
wireless_enable(wireless_get() & suspend_flags);
break;
case WIRELESS_ON:
wireless_enable(EC_WIRELESS_SWITCH_ALL);
break;
}
}
static enum ec_status wireless_enable_cmd(struct host_cmd_handler_args *args)
{
const struct ec_params_switch_enable_wireless_v1 *p = args->params;
struct ec_response_switch_enable_wireless_v1 *r = args->response;
if (args->version == 0) {
/* Ver.0 command just set all current flags */
wireless_enable(p->now_flags);
return EC_RES_SUCCESS;
}
/* Ver.1 can set flags based on mask */
wireless_enable((wireless_get() & ~p->now_mask) |
(p->now_flags & p->now_mask));
suspend_flags = (suspend_flags & ~p->suspend_mask) |
(p->suspend_flags & p->suspend_mask);
/* And return the current flags */
r->now_flags = wireless_get();
r->suspend_flags = suspend_flags;
args->response_size = sizeof(*r);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_SWITCH_ENABLE_WIRELESS,
wireless_enable_cmd,
EC_VER_MASK(0) | EC_VER_MASK(1));
static int command_wireless(int argc, char **argv)
{
char *e;
int i;
if (argc >= 2) {
i = strtoi(argv[1], &e, 0);
if (*e)
return EC_ERROR_PARAM1;
wireless_enable(i);
}
if (argc >= 3) {
i = strtoi(argv[2], &e, 0);
if (*e)
return EC_ERROR_PARAM2;
suspend_flags = i;
}
ccprintf("Wireless flags: now=0x%x, suspend=0x%x\n", wireless_get(),
suspend_flags);
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(wireless, command_wireless,
"[now [suspend]]",
"Get/set wireless flags");
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