| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [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> |
| 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 */ |
| 32 | static 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 | |
| 57 | static int h1940bt_set_block(void *data, bool blocked) |
| 58 | { |
| 59 | h1940bt_enable(!blocked); |
| 60 | return 0; |
| 61 | } |
| 62 | |
| 63 | static const struct rfkill_ops h1940bt_rfkill_ops = { |
| 64 | .set_block = h1940bt_set_block, |
| 65 | }; |
| 66 | |
| 67 | static 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 | |
| 110 | err_rfkill: |
| 111 | rfkill_destroy(rfk); |
| 112 | err_rfk_alloc: |
| 113 | return ret; |
| 114 | } |
| 115 | |
| 116 | static 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 | |
| 135 | static struct platform_driver h1940bt_driver = { |
| 136 | .driver = { |
| 137 | .name = DRV_NAME, |
| 138 | }, |
| 139 | .probe = h1940bt_probe, |
| 140 | .remove = h1940bt_remove, |
| 141 | }; |
| 142 | |
| 143 | module_platform_driver(h1940bt_driver); |
| 144 | |
| 145 | MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>"); |
| 146 | MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip"); |
| 147 | MODULE_LICENSE("GPL"); |