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Arnaud Patard
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Russell King
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May 11, 2007
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refs/heads/master: b8b6970b4fe08397554295b0c5169bec7575f7c9 | ||
refs/heads/master: 7fdc7849d2f9f926cbaec224bbcbacb164b07b23 |
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/* | ||
* 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" | ||
* | ||
*/ | ||
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#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> | ||
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#define DRV_NAME "h1940-bt" | ||
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#ifdef CONFIG_LEDS_H1940 | ||
DEFINE_LED_TRIGGER(bt_led_trigger); | ||
#endif | ||
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static int state; | ||
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/* 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 | ||
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/* 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); | ||
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state = 1; | ||
} | ||
else { | ||
#ifdef CONFIG_LEDS_H1940 | ||
led_trigger_event(bt_led_trigger, 0); | ||
#endif | ||
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s3c2410_gpio_setpin(S3C2410_GPH1, 1); | ||
mdelay(10); | ||
s3c2410_gpio_setpin(S3C2410_GPH1, 0); | ||
mdelay(10); | ||
h1940_latch_control(H1940_LATCH_BLUETOOTH_POWER, 0); | ||
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state = 0; | ||
} | ||
} | ||
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static ssize_t h1940bt_show(struct device *dev, struct device_attribute *attr, char *buf) | ||
{ | ||
return snprintf(buf, PAGE_SIZE, "%d\n", state); | ||
} | ||
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static ssize_t h1940bt_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) | ||
{ | ||
int new_state; | ||
char *endp; | ||
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new_state = simple_strtoul(buf, &endp, 0); | ||
if (*endp && !isspace(*endp)) | ||
return -EINVAL; | ||
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h1940bt_enable(new_state); | ||
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return count; | ||
} | ||
static DEVICE_ATTR(enable, 0644, | ||
h1940bt_show, | ||
h1940bt_store); | ||
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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); | ||
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#ifdef CONFIG_LEDS_H1940 | ||
led_trigger_register_simple("h1940-bluetooth", &bt_led_trigger); | ||
#endif | ||
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/* disable BT by default */ | ||
h1940bt_enable(0); | ||
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return device_create_file(&pdev->dev, &dev_attr_enable); | ||
} | ||
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static int h1940bt_remove(struct platform_device *pdev) | ||
{ | ||
#ifdef CONFIG_LEDS_H1940 | ||
led_trigger_unregister_simple(bt_led_trigger); | ||
#endif | ||
return 0; | ||
} | ||
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static struct platform_driver h1940bt_driver = { | ||
.driver = { | ||
.name = DRV_NAME, | ||
}, | ||
.probe = h1940bt_probe, | ||
.remove = h1940bt_remove, | ||
}; | ||
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static int __init h1940bt_init(void) | ||
{ | ||
return platform_driver_register(&h1940bt_driver); | ||
} | ||
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static void __exit h1940bt_exit(void) | ||
{ | ||
platform_driver_unregister(&h1940bt_driver); | ||
} | ||
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module_init(h1940bt_init); | ||
module_exit(h1940bt_exit); | ||
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MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>"); | ||
MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip"); | ||
MODULE_LICENSE("GPL"); |
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