Arnaud Patard | 7fdc784 | 2007-05-09 21:41:03 +0100 | [diff] [blame] | 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> |
Ben Dooks | ec976d6 | 2009-05-13 22:52:24 +0100 | [diff] [blame] | 19 | #include <linux/gpio.h> |
| 20 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 21 | #include <mach/regs-gpio.h> |
| 22 | #include <mach/hardware.h> |
| 23 | #include <mach/h1940-latch.h> |
Arnaud Patard | 7fdc784 | 2007-05-09 21:41:03 +0100 | [diff] [blame] | 24 | |
| 25 | #define DRV_NAME "h1940-bt" |
| 26 | |
| 27 | #ifdef CONFIG_LEDS_H1940 |
| 28 | DEFINE_LED_TRIGGER(bt_led_trigger); |
| 29 | #endif |
| 30 | |
| 31 | static int state; |
| 32 | |
| 33 | /* Bluetooth control */ |
| 34 | static void h1940bt_enable(int on) |
| 35 | { |
| 36 | if (on) { |
| 37 | #ifdef CONFIG_LEDS_H1940 |
| 38 | /* flashing Blue */ |
| 39 | led_trigger_event(bt_led_trigger, LED_HALF); |
| 40 | #endif |
| 41 | |
| 42 | /* Power on the chip */ |
| 43 | h1940_latch_control(0, H1940_LATCH_BLUETOOTH_POWER); |
| 44 | /* Reset the chip */ |
| 45 | mdelay(10); |
Ben Dooks | 070276d | 2009-05-17 22:32:23 +0100 | [diff] [blame] | 46 | s3c2410_gpio_setpin(S3C2410_GPH(1), 1); |
Arnaud Patard | 7fdc784 | 2007-05-09 21:41:03 +0100 | [diff] [blame] | 47 | mdelay(10); |
Ben Dooks | 070276d | 2009-05-17 22:32:23 +0100 | [diff] [blame] | 48 | s3c2410_gpio_setpin(S3C2410_GPH(1), 0); |
Arnaud Patard | 7fdc784 | 2007-05-09 21:41:03 +0100 | [diff] [blame] | 49 | |
| 50 | state = 1; |
| 51 | } |
| 52 | else { |
| 53 | #ifdef CONFIG_LEDS_H1940 |
| 54 | led_trigger_event(bt_led_trigger, 0); |
| 55 | #endif |
| 56 | |
Ben Dooks | 070276d | 2009-05-17 22:32:23 +0100 | [diff] [blame] | 57 | s3c2410_gpio_setpin(S3C2410_GPH(1), 1); |
Arnaud Patard | 7fdc784 | 2007-05-09 21:41:03 +0100 | [diff] [blame] | 58 | mdelay(10); |
Ben Dooks | 070276d | 2009-05-17 22:32:23 +0100 | [diff] [blame] | 59 | s3c2410_gpio_setpin(S3C2410_GPH(1), 0); |
Arnaud Patard | 7fdc784 | 2007-05-09 21:41:03 +0100 | [diff] [blame] | 60 | mdelay(10); |
| 61 | h1940_latch_control(H1940_LATCH_BLUETOOTH_POWER, 0); |
| 62 | |
| 63 | state = 0; |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | static ssize_t h1940bt_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 68 | { |
| 69 | return snprintf(buf, PAGE_SIZE, "%d\n", state); |
| 70 | } |
| 71 | |
| 72 | static ssize_t h1940bt_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
| 73 | { |
| 74 | int new_state; |
| 75 | char *endp; |
| 76 | |
| 77 | new_state = simple_strtoul(buf, &endp, 0); |
| 78 | if (*endp && !isspace(*endp)) |
| 79 | return -EINVAL; |
| 80 | |
| 81 | h1940bt_enable(new_state); |
| 82 | |
| 83 | return count; |
| 84 | } |
| 85 | static DEVICE_ATTR(enable, 0644, |
| 86 | h1940bt_show, |
| 87 | h1940bt_store); |
| 88 | |
| 89 | static int __init h1940bt_probe(struct platform_device *pdev) |
| 90 | { |
| 91 | /* Configures BT serial port GPIOs */ |
Ben Dooks | 070276d | 2009-05-17 22:32:23 +0100 | [diff] [blame] | 92 | s3c2410_gpio_cfgpin(S3C2410_GPH(0), S3C2410_GPH0_nCTS0); |
| 93 | s3c2410_gpio_pullup(S3C2410_GPH(0), 1); |
| 94 | s3c2410_gpio_cfgpin(S3C2410_GPH(1), S3C2410_GPIO_OUTPUT); |
| 95 | s3c2410_gpio_pullup(S3C2410_GPH(1), 1); |
| 96 | s3c2410_gpio_cfgpin(S3C2410_GPH(2), S3C2410_GPH2_TXD0); |
| 97 | s3c2410_gpio_pullup(S3C2410_GPH(2), 1); |
| 98 | s3c2410_gpio_cfgpin(S3C2410_GPH(3), S3C2410_GPH3_RXD0); |
| 99 | s3c2410_gpio_pullup(S3C2410_GPH(3), 1); |
Arnaud Patard | 7fdc784 | 2007-05-09 21:41:03 +0100 | [diff] [blame] | 100 | |
| 101 | #ifdef CONFIG_LEDS_H1940 |
| 102 | led_trigger_register_simple("h1940-bluetooth", &bt_led_trigger); |
| 103 | #endif |
| 104 | |
| 105 | /* disable BT by default */ |
| 106 | h1940bt_enable(0); |
| 107 | |
| 108 | return device_create_file(&pdev->dev, &dev_attr_enable); |
| 109 | } |
| 110 | |
| 111 | static int h1940bt_remove(struct platform_device *pdev) |
| 112 | { |
| 113 | #ifdef CONFIG_LEDS_H1940 |
| 114 | led_trigger_unregister_simple(bt_led_trigger); |
| 115 | #endif |
| 116 | return 0; |
| 117 | } |
| 118 | |
| 119 | |
| 120 | static struct platform_driver h1940bt_driver = { |
| 121 | .driver = { |
| 122 | .name = DRV_NAME, |
| 123 | }, |
| 124 | .probe = h1940bt_probe, |
| 125 | .remove = h1940bt_remove, |
| 126 | }; |
| 127 | |
| 128 | |
| 129 | static int __init h1940bt_init(void) |
| 130 | { |
| 131 | return platform_driver_register(&h1940bt_driver); |
| 132 | } |
| 133 | |
| 134 | static void __exit h1940bt_exit(void) |
| 135 | { |
| 136 | platform_driver_unregister(&h1940bt_driver); |
| 137 | } |
| 138 | |
| 139 | module_init(h1940bt_init); |
| 140 | module_exit(h1940bt_exit); |
| 141 | |
| 142 | MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>"); |
| 143 | MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip"); |
| 144 | MODULE_LICENSE("GPL"); |