1 // SPDX-License-Identifier: GPL-2.0-only
3 * Bluetooth built-in chip control
5 * Copyright (c) 2008 Dmitry Baryshkov
8 #include <linux/kernel.h>
9 #include <linux/module.h>
10 #include <linux/platform_device.h>
11 #include <linux/gpio.h>
12 #include <linux/delay.h>
13 #include <linux/rfkill.h>
17 static void tosa_bt_on(struct tosa_bt_data *data)
19 gpio_set_value(data->gpio_reset, 0);
20 gpio_set_value(data->gpio_pwr, 1);
21 gpio_set_value(data->gpio_reset, 1);
23 gpio_set_value(data->gpio_reset, 0);
26 static void tosa_bt_off(struct tosa_bt_data *data)
28 gpio_set_value(data->gpio_reset, 1);
30 gpio_set_value(data->gpio_pwr, 0);
31 gpio_set_value(data->gpio_reset, 0);
34 static int tosa_bt_set_block(void *data, bool blocked)
36 pr_info("BT_RADIO going: %s\n", blocked ? "off" : "on");
39 pr_info("TOSA_BT: going ON\n");
42 pr_info("TOSA_BT: going OFF\n");
49 static const struct rfkill_ops tosa_bt_rfkill_ops = {
50 .set_block = tosa_bt_set_block,
53 static int tosa_bt_probe(struct platform_device *dev)
58 struct tosa_bt_data *data = dev->dev.platform_data;
60 rc = gpio_request(data->gpio_reset, "Bluetooth reset");
63 rc = gpio_direction_output(data->gpio_reset, 0);
66 rc = gpio_request(data->gpio_pwr, "Bluetooth power");
69 rc = gpio_direction_output(data->gpio_pwr, 0);
73 rfk = rfkill_alloc("tosa-bt", &dev->dev, RFKILL_TYPE_BLUETOOTH,
74 &tosa_bt_rfkill_ops, data);
80 rc = rfkill_register(rfk);
84 platform_set_drvdata(dev, rfk);
93 gpio_free(data->gpio_pwr);
96 gpio_free(data->gpio_reset);
101 static int tosa_bt_remove(struct platform_device *dev)
103 struct tosa_bt_data *data = dev->dev.platform_data;
104 struct rfkill *rfk = platform_get_drvdata(dev);
106 platform_set_drvdata(dev, NULL);
109 rfkill_unregister(rfk);
116 gpio_free(data->gpio_pwr);
117 gpio_free(data->gpio_reset);
122 static struct platform_driver tosa_bt_driver = {
123 .probe = tosa_bt_probe,
124 .remove = tosa_bt_remove,
130 module_platform_driver(tosa_bt_driver);
132 MODULE_LICENSE("GPL");
133 MODULE_AUTHOR("Dmitry Baryshkov");
134 MODULE_DESCRIPTION("Bluetooth built-in chip control");