mirror of https://gitee.com/openkylin/linux.git
143 lines
3.2 KiB
C
143 lines
3.2 KiB
C
/*
|
|
* arch/arm/mach-s3c2410/h1940-bluetooth.c
|
|
* Copyright (c) Arnaud Patard <arnaud.patard@rtp-net.org>
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file COPYING in the main directory of this archive for
|
|
* more details.
|
|
*
|
|
* S3C2410 bluetooth "driver"
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/string.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/leds.h>
|
|
#include <asm/arch/regs-gpio.h>
|
|
#include <asm/hardware.h>
|
|
#include <asm/arch/h1940-latch.h>
|
|
|
|
#define DRV_NAME "h1940-bt"
|
|
|
|
#ifdef CONFIG_LEDS_H1940
|
|
DEFINE_LED_TRIGGER(bt_led_trigger);
|
|
#endif
|
|
|
|
static int state;
|
|
|
|
/* Bluetooth control */
|
|
static void h1940bt_enable(int on)
|
|
{
|
|
if (on) {
|
|
#ifdef CONFIG_LEDS_H1940
|
|
/* flashing Blue */
|
|
led_trigger_event(bt_led_trigger, LED_HALF);
|
|
#endif
|
|
|
|
/* Power on the chip */
|
|
h1940_latch_control(0, H1940_LATCH_BLUETOOTH_POWER);
|
|
/* Reset the chip */
|
|
mdelay(10);
|
|
s3c2410_gpio_setpin(S3C2410_GPH1, 1);
|
|
mdelay(10);
|
|
s3c2410_gpio_setpin(S3C2410_GPH1, 0);
|
|
|
|
state = 1;
|
|
}
|
|
else {
|
|
#ifdef CONFIG_LEDS_H1940
|
|
led_trigger_event(bt_led_trigger, 0);
|
|
#endif
|
|
|
|
s3c2410_gpio_setpin(S3C2410_GPH1, 1);
|
|
mdelay(10);
|
|
s3c2410_gpio_setpin(S3C2410_GPH1, 0);
|
|
mdelay(10);
|
|
h1940_latch_control(H1940_LATCH_BLUETOOTH_POWER, 0);
|
|
|
|
state = 0;
|
|
}
|
|
}
|
|
|
|
static ssize_t h1940bt_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", state);
|
|
}
|
|
|
|
static ssize_t h1940bt_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
int new_state;
|
|
char *endp;
|
|
|
|
new_state = simple_strtoul(buf, &endp, 0);
|
|
if (*endp && !isspace(*endp))
|
|
return -EINVAL;
|
|
|
|
h1940bt_enable(new_state);
|
|
|
|
return count;
|
|
}
|
|
static DEVICE_ATTR(enable, 0644,
|
|
h1940bt_show,
|
|
h1940bt_store);
|
|
|
|
static int __init h1940bt_probe(struct platform_device *pdev)
|
|
{
|
|
/* Configures BT serial port GPIOs */
|
|
s3c2410_gpio_cfgpin(S3C2410_GPH0, S3C2410_GPH0_nCTS0);
|
|
s3c2410_gpio_pullup(S3C2410_GPH0, 1);
|
|
s3c2410_gpio_cfgpin(S3C2410_GPH1, S3C2410_GPH1_OUTP);
|
|
s3c2410_gpio_pullup(S3C2410_GPH1, 1);
|
|
s3c2410_gpio_cfgpin(S3C2410_GPH2, S3C2410_GPH2_TXD0);
|
|
s3c2410_gpio_pullup(S3C2410_GPH2, 1);
|
|
s3c2410_gpio_cfgpin(S3C2410_GPH3, S3C2410_GPH3_RXD0);
|
|
s3c2410_gpio_pullup(S3C2410_GPH3, 1);
|
|
|
|
#ifdef CONFIG_LEDS_H1940
|
|
led_trigger_register_simple("h1940-bluetooth", &bt_led_trigger);
|
|
#endif
|
|
|
|
/* disable BT by default */
|
|
h1940bt_enable(0);
|
|
|
|
return device_create_file(&pdev->dev, &dev_attr_enable);
|
|
}
|
|
|
|
static int h1940bt_remove(struct platform_device *pdev)
|
|
{
|
|
#ifdef CONFIG_LEDS_H1940
|
|
led_trigger_unregister_simple(bt_led_trigger);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct platform_driver h1940bt_driver = {
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
},
|
|
.probe = h1940bt_probe,
|
|
.remove = h1940bt_remove,
|
|
};
|
|
|
|
|
|
static int __init h1940bt_init(void)
|
|
{
|
|
return platform_driver_register(&h1940bt_driver);
|
|
}
|
|
|
|
static void __exit h1940bt_exit(void)
|
|
{
|
|
platform_driver_unregister(&h1940bt_driver);
|
|
}
|
|
|
|
module_init(h1940bt_init);
|
|
module_exit(h1940bt_exit);
|
|
|
|
MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
|
|
MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip");
|
|
MODULE_LICENSE("GPL");
|