projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 7fdc7849 AP |
1 | /* |
| 2 | * arch/arm/mach-s3c2410/h1940-bluetooth.c | |
| 3 | * Copyright (c) Arnaud Patard <arnaud.patard@rtp-net.org> | |
| 4 | * | |
| 5 | * This file is subject to the terms and conditions of the GNU General Public | |
| 6 | * License. See the file COPYING in the main directory of this archive for | |
| 7 | * more details. | |
| 8 | * | |
| 9 | * S3C2410 bluetooth "driver" | |
| 10 | * | |
| 11 | */ | |
| 12 | ||
| 13 | #include <linux/module.h> | |
| 14 | #include <linux/platform_device.h> | |
| 15 | #include <linux/delay.h> | |
| 16 | #include <linux/string.h> | |
| 17 | #include <linux/ctype.h> | |
| 18 | #include <linux/leds.h> | |
| 19 | #include <asm/arch/regs-gpio.h> | |
| 20 | #include <asm/hardware.h> | |
| 21 | #include <asm/arch/h1940-latch.h> | |
| 22 | ||
| 23 | #define DRV_NAME "h1940-bt" | |
| 24 | ||
| 25 | #ifdef CONFIG_LEDS_H1940 | |
| 26 | DEFINE_LED_TRIGGER(bt_led_trigger); | |
| 27 | #endif | |
| 28 | ||
| 29 | static int state; | |
| 30 | ||
| 31 | /* Bluetooth control */ | |
| 32 | static void h1940bt_enable(int on) | |
| 33 | { | |
| 34 | if (on) { | |
| 35 | #ifdef CONFIG_LEDS_H1940 | |
| 36 | /* flashing Blue */ | |
| 37 | led_trigger_event(bt_led_trigger, LED_HALF); | |
| 38 | #endif | |
| 39 | ||
| 40 | /* Power on the chip */ | |
| 41 | h1940_latch_control(0, H1940_LATCH_BLUETOOTH_POWER); | |
| 42 | /* Reset the chip */ | |
| 43 | mdelay(10); | |
| 44 | s3c2410_gpio_setpin(S3C2410_GPH1, 1); | |
| 45 | mdelay(10); | |
| 46 | s3c2410_gpio_setpin(S3C2410_GPH1, 0); | |
| 47 | ||
| 48 | state = 1; | |
| 49 | } | |
| 50 | else { | |
| 51 | #ifdef CONFIG_LEDS_H1940 | |
| 52 | led_trigger_event(bt_led_trigger, 0); | |
| 53 | #endif | |
| 54 | ||
| 55 | s3c2410_gpio_setpin(S3C2410_GPH1, 1); | |
| 56 | mdelay(10); | |
| 57 | s3c2410_gpio_setpin(S3C2410_GPH1, 0); | |
| 58 | mdelay(10); | |
| 59 | h1940_latch_control(H1940_LATCH_BLUETOOTH_POWER, 0); | |
| 60 | ||
| 61 | state = 0; | |
| 62 | } | |
| 63 | } | |
| 64 | ||
| 65 | static ssize_t h1940bt_show(struct device *dev, struct device_attribute *attr, char *buf) | |
| 66 | { | |
| 67 | return snprintf(buf, PAGE_SIZE, "%d\n", state); | |
| 68 | } | |
| 69 | ||
| 70 | static ssize_t h1940bt_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) | |
| 71 | { | |
| 72 | int new_state; | |
| 73 | char *endp; | |
| 74 | ||
| 75 | new_state = simple_strtoul(buf, &endp, 0); | |
| 76 | if (*endp && !isspace(*endp)) | |
| 77 | return -EINVAL; | |
| 78 | ||
| 79 | h1940bt_enable(new_state); | |
| 80 | ||
| 81 | return count; | |
| 82 | } | |
| 83 | static DEVICE_ATTR(enable, 0644, | |
| 84 | h1940bt_show, | |
| 85 | h1940bt_store); | |
| 86 | ||
| 87 | static int __init h1940bt_probe(struct platform_device *pdev) | |
| 88 | { | |
| 89 | /* Configures BT serial port GPIOs */ | |
| 90 | s3c2410_gpio_cfgpin(S3C2410_GPH0, S3C2410_GPH0_nCTS0); | |
| 91 | s3c2410_gpio_pullup(S3C2410_GPH0, 1); | |
| 92 | s3c2410_gpio_cfgpin(S3C2410_GPH1, S3C2410_GPH1_OUTP); | |
| 93 | s3c2410_gpio_pullup(S3C2410_GPH1, 1); | |
| 94 | s3c2410_gpio_cfgpin(S3C2410_GPH2, S3C2410_GPH2_TXD0); | |
| 95 | s3c2410_gpio_pullup(S3C2410_GPH2, 1); | |
| 96 | s3c2410_gpio_cfgpin(S3C2410_GPH3, S3C2410_GPH3_RXD0); | |
| 97 | s3c2410_gpio_pullup(S3C2410_GPH3, 1); | |
| 98 | ||
| 99 | #ifdef CONFIG_LEDS_H1940 | |
| 100 | led_trigger_register_simple("h1940-bluetooth", &bt_led_trigger); | |
| 101 | #endif | |
| 102 | ||
| 103 | /* disable BT by default */ | |
| 104 | h1940bt_enable(0); | |
| 105 | ||
| 106 | return device_create_file(&pdev->dev, &dev_attr_enable); | |
| 107 | } | |
| 108 | ||
| 109 | static int h1940bt_remove(struct platform_device *pdev) | |
| 110 | { | |
| 111 | #ifdef CONFIG_LEDS_H1940 | |
| 112 | led_trigger_unregister_simple(bt_led_trigger); | |
| 113 | #endif | |
| 114 | return 0; | |
| 115 | } | |
| 116 | ||
| 117 | ||
| 118 | static struct platform_driver h1940bt_driver = { | |
| 119 | .driver = { | |
| 120 | .name = DRV_NAME, | |
| 121 | }, | |
| 122 | .probe = h1940bt_probe, | |
| 123 | .remove = h1940bt_remove, | |
| 124 | }; | |
| 125 | ||
| 126 | ||
| 127 | static int __init h1940bt_init(void) | |
| 128 | { | |
| 129 | return platform_driver_register(&h1940bt_driver); | |
| 130 | } | |
| 131 | ||
| 132 | static void __exit h1940bt_exit(void) | |
| 133 | { | |
| 134 | platform_driver_unregister(&h1940bt_driver); | |
| 135 | } | |
| 136 | ||
| 137 | module_init(h1940bt_init); | |
| 138 | module_exit(h1940bt_exit); | |
| 139 | ||
| 140 | MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>"); | |
| 141 | MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip"); | |
| 142 | MODULE_LICENSE("GPL"); |