/* * 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 <linux/gpio.h> #include <mach/regs-gpio.h> #include <mach/hardware.h> #include <mach/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_GPH(1), 1); mdelay(10); s3c2410_gpio_setpin(S3C2410_GPH(1), 0); state = 1; } else { #ifdef CONFIG_LEDS_H1940 led_trigger_event(bt_led_trigger, 0); #endif s3c2410_gpio_setpin(S3C2410_GPH(1), 1); mdelay(10); s3c2410_gpio_setpin(S3C2410_GPH(1), 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_GPH(0), S3C2410_GPH0_nCTS0); s3c2410_gpio_pullup(S3C2410_GPH(0), 1); s3c2410_gpio_cfgpin(S3C2410_GPH(1), S3C2410_GPIO_OUTPUT); s3c2410_gpio_pullup(S3C2410_GPH(1), 1); s3c2410_gpio_cfgpin(S3C2410_GPH(2), S3C2410_GPH2_TXD0); s3c2410_gpio_pullup(S3C2410_GPH(2), 1); s3c2410_gpio_cfgpin(S3C2410_GPH(3), S3C2410_GPH3_RXD0); s3c2410_gpio_pullup(S3C2410_GPH(3), 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");