| Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2009 Google, Inc. |
| 3 | * Copyright (C) 2009 HTC Corporation. |
| 4 | * |
| 5 | * This software is licensed under the terms of the GNU General Public |
| 6 | * License version 2, as published by the Free Software Foundation, and |
| 7 | * may be copied, distributed, and modified under those terms. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #include <linux/delay.h> |
| 17 | #include <linux/device.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/platform_device.h> |
| 20 | #include <linux/rfkill.h> |
| 21 | #include <asm/gpio.h> |
| 22 | #include <asm/mach-types.h> |
| 23 | |
| 24 | #include "board-mahimahi.h" |
| 25 | |
| 26 | static struct rfkill *bt_rfk; |
| 27 | static const char bt_name[] = "bcm4329"; |
| 28 | |
| 29 | static int bluetooth_set_power(void *data, bool blocked) |
| 30 | { |
| 31 | if (!blocked) { |
| 32 | gpio_direction_output(MAHIMAHI_GPIO_BT_RESET_N, 1); |
| 33 | gpio_direction_output(MAHIMAHI_GPIO_BT_SHUTDOWN_N, 1); |
| 34 | } else { |
| 35 | gpio_direction_output(MAHIMAHI_GPIO_BT_SHUTDOWN_N, 0); |
| 36 | gpio_direction_output(MAHIMAHI_GPIO_BT_RESET_N, 0); |
| 37 | } |
| 38 | return 0; |
| 39 | } |
| 40 | |
| 41 | static struct rfkill_ops mahimahi_rfkill_ops = { |
| 42 | .set_block = bluetooth_set_power, |
| 43 | }; |
| 44 | |
| 45 | static int mahimahi_rfkill_probe(struct platform_device *pdev) |
| 46 | { |
| 47 | int rc = 0; |
| 48 | bool default_state = true; /* off */ |
| 49 | |
| 50 | rc = gpio_request(MAHIMAHI_GPIO_BT_RESET_N, "bt_reset"); |
| 51 | if (rc) |
| 52 | goto err_gpio_reset; |
| 53 | rc = gpio_request(MAHIMAHI_GPIO_BT_SHUTDOWN_N, "bt_shutdown"); |
| 54 | if (rc) |
| 55 | goto err_gpio_shutdown; |
| 56 | |
| 57 | bluetooth_set_power(NULL, default_state); |
| 58 | |
| 59 | bt_rfk = rfkill_alloc(bt_name, &pdev->dev, RFKILL_TYPE_BLUETOOTH, |
| 60 | &mahimahi_rfkill_ops, NULL); |
| 61 | if (!bt_rfk) { |
| 62 | rc = -ENOMEM; |
| 63 | goto err_rfkill_alloc; |
| 64 | } |
| 65 | |
| 66 | rfkill_set_states(bt_rfk, default_state, false); |
| 67 | |
| 68 | /* userspace cannot take exclusive control */ |
| 69 | |
| 70 | rc = rfkill_register(bt_rfk); |
| 71 | if (rc) |
| 72 | goto err_rfkill_reg; |
| 73 | |
| 74 | return 0; |
| 75 | |
| 76 | err_rfkill_reg: |
| 77 | rfkill_destroy(bt_rfk); |
| 78 | err_rfkill_alloc: |
| 79 | gpio_free(MAHIMAHI_GPIO_BT_SHUTDOWN_N); |
| 80 | err_gpio_shutdown: |
| 81 | gpio_free(MAHIMAHI_GPIO_BT_RESET_N); |
| 82 | err_gpio_reset: |
| 83 | return rc; |
| 84 | } |
| 85 | |
| 86 | static int mahimahi_rfkill_remove(struct platform_device *dev) |
| 87 | { |
| 88 | rfkill_unregister(bt_rfk); |
| 89 | rfkill_destroy(bt_rfk); |
| 90 | gpio_free(MAHIMAHI_GPIO_BT_SHUTDOWN_N); |
| 91 | gpio_free(MAHIMAHI_GPIO_BT_RESET_N); |
| 92 | |
| 93 | return 0; |
| 94 | } |
| 95 | |
| 96 | static struct platform_driver mahimahi_rfkill_driver = { |
| 97 | .probe = mahimahi_rfkill_probe, |
| 98 | .remove = mahimahi_rfkill_remove, |
| 99 | .driver = { |
| 100 | .name = "mahimahi_rfkill", |
| 101 | .owner = THIS_MODULE, |
| 102 | }, |
| 103 | }; |
| 104 | |
| 105 | static int __init mahimahi_rfkill_init(void) |
| 106 | { |
| 107 | if (!machine_is_mahimahi()) |
| 108 | return 0; |
| 109 | |
| 110 | return platform_driver_register(&mahimahi_rfkill_driver); |
| 111 | } |
| 112 | |
| 113 | static void __exit mahimahi_rfkill_exit(void) |
| 114 | { |
| 115 | platform_driver_unregister(&mahimahi_rfkill_driver); |
| 116 | } |
| 117 | |
| 118 | module_init(mahimahi_rfkill_init); |
| 119 | module_exit(mahimahi_rfkill_exit); |
| 120 | MODULE_DESCRIPTION("mahimahi rfkill"); |
| 121 | MODULE_AUTHOR("Nick Pelly <npelly@google.com>"); |
| 122 | MODULE_LICENSE("GPL"); |