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/*
* Copyright (C) 2010 Samsung Electronics Co., Ltd.
*
* Copyright (C) 2008 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
* Modified for Crespo on August, 2010 By Samsung Electronics Co.
* This is modified operate according to each status.
*
*/
/* Control bluetooth power for Crespo platform */
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/rfkill.h>
#include <linux/delay.h>
#include <linux/types.h>
#include <linux/wakelock.h>
#include <linux/irq.h>
#include <linux/workqueue.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <mach/gpio.h>
#include <mach/gpio-herring.h>
#include <mach/hardware.h>
#include <plat/gpio-cfg.h>
#include <plat/irqs.h>
#include "herring.h"
#define IRQ_BT_HOST_WAKE IRQ_EINT(21)
static struct wake_lock rfkill_wake_lock;
#ifndef GPIO_LEVEL_LOW
#define GPIO_LEVEL_LOW 0
#define GPIO_LEVEL_HIGH 1
#endif
static struct rfkill *bt_rfk;
static const char bt_name[] = "bcm4329";
#ifdef CONFIG_CPU_DIDLE
static bool bt_running = false;
bool bt_is_running(void)
{
return bt_running;
}
EXPORT_SYMBOL(bt_is_running);
#endif
static int bluetooth_set_power(void *data, enum rfkill_user_states state)
{
int ret = 0;
int irq;
/* BT Host Wake IRQ */
irq = IRQ_BT_HOST_WAKE;
switch (state) {
case RFKILL_USER_STATE_UNBLOCKED:
pr_debug("[BT] Device Powering ON\n");
s3c_setup_uart_cfg_gpio(0);
if (gpio_is_valid(GPIO_WLAN_BT_EN))
gpio_direction_output(GPIO_WLAN_BT_EN, GPIO_LEVEL_HIGH);
if (gpio_is_valid(GPIO_BT_nRST))
gpio_direction_output(GPIO_BT_nRST, GPIO_LEVEL_LOW);
pr_debug("[BT] GPIO_BT_nRST = %d\n",
gpio_get_value(GPIO_BT_nRST));
/* Set GPIO_BT_WLAN_REG_ON high */
s3c_gpio_setpull(GPIO_WLAN_BT_EN, S3C_GPIO_PULL_NONE);
gpio_set_value(GPIO_WLAN_BT_EN, GPIO_LEVEL_HIGH);
s3c_gpio_slp_cfgpin(GPIO_WLAN_BT_EN, S3C_GPIO_SLP_OUT1);
s3c_gpio_slp_setpull_updown(GPIO_WLAN_BT_EN,
S3C_GPIO_PULL_NONE);
pr_debug("[BT] GPIO_WLAN_BT_EN = %d\n",
gpio_get_value(GPIO_WLAN_BT_EN));
/*
* FIXME sleep should be enabled disabled since the device is
* not booting if its enabled
*/
/*
* 100msec, delay between reg_on & rst.
* (bcm4329 powerup sequence)
*/
msleep(100);
/* Set GPIO_BT_nRST high */
s3c_gpio_setpull(GPIO_BT_nRST, S3C_GPIO_PULL_NONE);
gpio_set_value(GPIO_BT_nRST, GPIO_LEVEL_HIGH);
s3c_gpio_slp_cfgpin(GPIO_BT_nRST, S3C_GPIO_SLP_OUT1);
s3c_gpio_slp_setpull_updown(GPIO_BT_nRST, S3C_GPIO_PULL_NONE);
pr_debug("[BT] GPIO_BT_nRST = %d\n",
gpio_get_value(GPIO_BT_nRST));
/*
* 50msec, delay after bt rst
* (bcm4329 powerup sequence)
*/
msleep(50);
ret = enable_irq_wake(irq);
if (ret < 0)
pr_err("[BT] set wakeup src failed\n");
enable_irq(irq);
break;
case RFKILL_USER_STATE_SOFT_BLOCKED:
pr_debug("[BT] Device Powering OFF\n");
#ifdef CONFIG_CPU_DIDLE
bt_running = false;
#endif
ret = disable_irq_wake(irq);
if (ret < 0)
pr_err("[BT] unset wakeup src failed\n");
disable_irq(irq);
wake_unlock(&rfkill_wake_lock);
s3c_gpio_setpull(GPIO_BT_nRST, S3C_GPIO_PULL_NONE);
gpio_set_value(GPIO_BT_nRST, GPIO_LEVEL_LOW);
s3c_gpio_slp_cfgpin(GPIO_BT_nRST, S3C_GPIO_SLP_OUT0);
s3c_gpio_slp_setpull_updown(GPIO_BT_nRST, S3C_GPIO_PULL_NONE);
pr_debug("[BT] GPIO_BT_nRST = %d\n",
gpio_get_value(GPIO_BT_nRST));
if (gpio_get_value(GPIO_WLAN_nRST) == 0) {
s3c_gpio_setpull(GPIO_WLAN_BT_EN, S3C_GPIO_PULL_NONE);
gpio_set_value(GPIO_WLAN_BT_EN, GPIO_LEVEL_LOW);
s3c_gpio_slp_cfgpin(GPIO_WLAN_BT_EN, S3C_GPIO_SLP_OUT0);
s3c_gpio_slp_setpull_updown(GPIO_WLAN_BT_EN,
S3C_GPIO_PULL_NONE);
pr_debug("[BT] GPIO_WLAN_BT_EN = %d\n",
gpio_get_value(GPIO_WLAN_BT_EN));
}
break;
default:
pr_err("[BT] Bad bluetooth rfkill state %d\n", state);
}
return 0;
}
irqreturn_t bt_host_wake_irq_handler(int irq, void *dev_id)
{
pr_debug("[BT] bt_host_wake_irq_handler start\n");
#ifdef CONFIG_CPU_DIDLE
bt_running = true;
#endif
if (gpio_get_value(GPIO_BT_HOST_WAKE))
wake_lock(&rfkill_wake_lock);
else
wake_lock_timeout(&rfkill_wake_lock, HZ);
return IRQ_HANDLED;
}
static int bt_rfkill_set_block(void *data, bool blocked)
{
unsigned int ret = 0;
ret = bluetooth_set_power(data, blocked ?
RFKILL_USER_STATE_SOFT_BLOCKED :
RFKILL_USER_STATE_UNBLOCKED);
return ret;
}
static const struct rfkill_ops bt_rfkill_ops = {
.set_block = bt_rfkill_set_block,
};
static int __init herring_rfkill_probe(struct platform_device *pdev)
{
int irq;
int ret;
/* Initialize wake locks */
wake_lock_init(&rfkill_wake_lock, WAKE_LOCK_SUSPEND, "bt_host_wake");
ret = gpio_request(GPIO_WLAN_BT_EN, "GPB");
if (ret < 0) {
pr_err("[BT] Failed to request GPIO_WLAN_BT_EN!\n");
goto err_req_gpio_wlan_bt_en;
}
ret = gpio_request(GPIO_BT_nRST, "GPB");
if (ret < 0) {
pr_err("[BT] Failed to request GPIO_BT_nRST!\n");
goto err_req_gpio_bt_nrst;
}
/* BT Host Wake IRQ */
irq = IRQ_BT_HOST_WAKE;
ret = request_irq(irq, bt_host_wake_irq_handler,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
"bt_host_wake_irq_handler", NULL);
if (ret < 0) {
pr_err("[BT] Request_irq failed\n");
goto err_req_irq;
}
disable_irq(irq);
bt_rfk = rfkill_alloc(bt_name, &pdev->dev, RFKILL_TYPE_BLUETOOTH,
&bt_rfkill_ops, NULL);
if (!bt_rfk) {
pr_err("[BT] bt_rfk : rfkill_alloc is failed\n");
ret = -ENOMEM;
goto err_alloc;
}
rfkill_init_sw_state(bt_rfk, 0);
pr_debug("[BT] rfkill_register(bt_rfk)\n");
ret = rfkill_register(bt_rfk);
if (ret) {
pr_debug("********ERROR IN REGISTERING THE RFKILL********\n");
goto err_register;
}
rfkill_set_sw_state(bt_rfk, 1);
bluetooth_set_power(NULL, RFKILL_USER_STATE_SOFT_BLOCKED);
return ret;
err_register:
rfkill_destroy(bt_rfk);
err_alloc:
free_irq(irq, NULL);
err_req_irq:
gpio_free(GPIO_BT_nRST);
err_req_gpio_bt_nrst:
gpio_free(GPIO_WLAN_BT_EN);
err_req_gpio_wlan_bt_en:
return ret;
}
static struct platform_driver herring_device_rfkill = {
.probe = herring_rfkill_probe,
.driver = {
.name = "bt_rfkill",
.owner = THIS_MODULE,
},
};
static int __init herring_rfkill_init(void)
{
int rc = 0;
rc = platform_driver_register(&herring_device_rfkill);
return rc;
}
module_init(herring_rfkill_init);
MODULE_DESCRIPTION("herring rfkill");
MODULE_LICENSE("GPL");
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