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 <linux/gpio.h> 20#include <linux/rfkill.h> 21 22#include <plat/gpio-cfg.h> 23#include <mach/hardware.h> 24#include <mach/regs-gpio.h> 25#include <mach/gpio-samsung.h> 26 27#include "h1940.h" 28 29#define DRV_NAME "h1940-bt" 30 31/* Bluetooth control */ 32static void h1940bt_enable(int on) 33{ 34 if (on) { 35 /* Power on the chip */ 36 gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 1); 37 /* Reset the chip */ 38 mdelay(10); 39 40 gpio_set_value(S3C2410_GPH(1), 1); 41 mdelay(10); 42 gpio_set_value(S3C2410_GPH(1), 0); 43 44 h1940_led_blink_set(NULL, GPIO_LED_BLINK, NULL, NULL); 45 } 46 else { 47 gpio_set_value(S3C2410_GPH(1), 1); 48 mdelay(10); 49 gpio_set_value(S3C2410_GPH(1), 0); 50 mdelay(10); 51 gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 0); 52 53 h1940_led_blink_set(NULL, GPIO_LED_NO_BLINK_LOW, NULL, NULL); 54 } 55} 56 57static int h1940bt_set_block(void *data, bool blocked) 58{ 59 h1940bt_enable(!blocked); 60 return 0; 61} 62 63static const struct rfkill_ops h1940bt_rfkill_ops = { 64 .set_block = h1940bt_set_block, 65}; 66 67static int h1940bt_probe(struct platform_device *pdev) 68{ 69 struct rfkill *rfk; 70 int ret = 0; 71 72 ret = gpio_request(S3C2410_GPH(1), dev_name(&pdev->dev)); 73 if (ret) { 74 dev_err(&pdev->dev, "could not get GPH1\n"); 75 return ret; 76 } 77 78 ret = gpio_request(H1940_LATCH_BLUETOOTH_POWER, dev_name(&pdev->dev)); 79 if (ret) { 80 gpio_free(S3C2410_GPH(1)); 81 dev_err(&pdev->dev, "could not get BT_POWER\n"); 82 return ret; 83 } 84 85 /* Configures BT serial port GPIOs */ 86 s3c_gpio_cfgpin(S3C2410_GPH(0), S3C2410_GPH0_nCTS0); 87 s3c_gpio_setpull(S3C2410_GPH(0), S3C_GPIO_PULL_NONE); 88 s3c_gpio_cfgpin(S3C2410_GPH(1), S3C2410_GPIO_OUTPUT); 89 s3c_gpio_setpull(S3C2410_GPH(1), S3C_GPIO_PULL_NONE); 90 s3c_gpio_cfgpin(S3C2410_GPH(2), S3C2410_GPH2_TXD0); 91 s3c_gpio_setpull(S3C2410_GPH(2), S3C_GPIO_PULL_NONE); 92 s3c_gpio_cfgpin(S3C2410_GPH(3), S3C2410_GPH3_RXD0); 93 s3c_gpio_setpull(S3C2410_GPH(3), S3C_GPIO_PULL_NONE); 94 95 rfk = rfkill_alloc(DRV_NAME, &pdev->dev, RFKILL_TYPE_BLUETOOTH, 96 &h1940bt_rfkill_ops, NULL); 97 if (!rfk) { 98 ret = -ENOMEM; 99 goto err_rfk_alloc; 100 } 101 102 ret = rfkill_register(rfk); 103 if (ret) 104 goto err_rfkill; 105 106 platform_set_drvdata(pdev, rfk); 107 108 return 0; 109 110err_rfkill: 111 rfkill_destroy(rfk); 112err_rfk_alloc: 113 return ret; 114} 115 116static int h1940bt_remove(struct platform_device *pdev) 117{ 118 struct rfkill *rfk = platform_get_drvdata(pdev); 119 120 platform_set_drvdata(pdev, NULL); 121 gpio_free(S3C2410_GPH(1)); 122 123 if (rfk) { 124 rfkill_unregister(rfk); 125 rfkill_destroy(rfk); 126 } 127 rfk = NULL; 128 129 h1940bt_enable(0); 130 131 return 0; 132} 133 134 135static struct platform_driver h1940bt_driver = { 136 .driver = { 137 .name = DRV_NAME, 138 }, 139 .probe = h1940bt_probe, 140 .remove = h1940bt_remove, 141}; 142 143module_platform_driver(h1940bt_driver); 144 145MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>"); 146MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip"); 147MODULE_LICENSE("GPL"); 148