1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Bluetooth built-in chip control
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (c) 2008 Dmitry Baryshkov
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/kernel.h>
9*4882a593Smuzhiyun #include <linux/module.h>
10*4882a593Smuzhiyun #include <linux/platform_device.h>
11*4882a593Smuzhiyun #include <linux/gpio.h>
12*4882a593Smuzhiyun #include <linux/delay.h>
13*4882a593Smuzhiyun #include <linux/rfkill.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include "tosa_bt.h"
16*4882a593Smuzhiyun
tosa_bt_on(struct tosa_bt_data * data)17*4882a593Smuzhiyun static void tosa_bt_on(struct tosa_bt_data *data)
18*4882a593Smuzhiyun {
19*4882a593Smuzhiyun gpio_set_value(data->gpio_reset, 0);
20*4882a593Smuzhiyun gpio_set_value(data->gpio_pwr, 1);
21*4882a593Smuzhiyun gpio_set_value(data->gpio_reset, 1);
22*4882a593Smuzhiyun mdelay(20);
23*4882a593Smuzhiyun gpio_set_value(data->gpio_reset, 0);
24*4882a593Smuzhiyun }
25*4882a593Smuzhiyun
tosa_bt_off(struct tosa_bt_data * data)26*4882a593Smuzhiyun static void tosa_bt_off(struct tosa_bt_data *data)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun gpio_set_value(data->gpio_reset, 1);
29*4882a593Smuzhiyun mdelay(10);
30*4882a593Smuzhiyun gpio_set_value(data->gpio_pwr, 0);
31*4882a593Smuzhiyun gpio_set_value(data->gpio_reset, 0);
32*4882a593Smuzhiyun }
33*4882a593Smuzhiyun
tosa_bt_set_block(void * data,bool blocked)34*4882a593Smuzhiyun static int tosa_bt_set_block(void *data, bool blocked)
35*4882a593Smuzhiyun {
36*4882a593Smuzhiyun pr_info("BT_RADIO going: %s\n", blocked ? "off" : "on");
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun if (!blocked) {
39*4882a593Smuzhiyun pr_info("TOSA_BT: going ON\n");
40*4882a593Smuzhiyun tosa_bt_on(data);
41*4882a593Smuzhiyun } else {
42*4882a593Smuzhiyun pr_info("TOSA_BT: going OFF\n");
43*4882a593Smuzhiyun tosa_bt_off(data);
44*4882a593Smuzhiyun }
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun return 0;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun static const struct rfkill_ops tosa_bt_rfkill_ops = {
50*4882a593Smuzhiyun .set_block = tosa_bt_set_block,
51*4882a593Smuzhiyun };
52*4882a593Smuzhiyun
tosa_bt_probe(struct platform_device * dev)53*4882a593Smuzhiyun static int tosa_bt_probe(struct platform_device *dev)
54*4882a593Smuzhiyun {
55*4882a593Smuzhiyun int rc;
56*4882a593Smuzhiyun struct rfkill *rfk;
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun struct tosa_bt_data *data = dev->dev.platform_data;
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun rc = gpio_request(data->gpio_reset, "Bluetooth reset");
61*4882a593Smuzhiyun if (rc)
62*4882a593Smuzhiyun goto err_reset;
63*4882a593Smuzhiyun rc = gpio_direction_output(data->gpio_reset, 0);
64*4882a593Smuzhiyun if (rc)
65*4882a593Smuzhiyun goto err_reset_dir;
66*4882a593Smuzhiyun rc = gpio_request(data->gpio_pwr, "Bluetooth power");
67*4882a593Smuzhiyun if (rc)
68*4882a593Smuzhiyun goto err_pwr;
69*4882a593Smuzhiyun rc = gpio_direction_output(data->gpio_pwr, 0);
70*4882a593Smuzhiyun if (rc)
71*4882a593Smuzhiyun goto err_pwr_dir;
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun rfk = rfkill_alloc("tosa-bt", &dev->dev, RFKILL_TYPE_BLUETOOTH,
74*4882a593Smuzhiyun &tosa_bt_rfkill_ops, data);
75*4882a593Smuzhiyun if (!rfk) {
76*4882a593Smuzhiyun rc = -ENOMEM;
77*4882a593Smuzhiyun goto err_rfk_alloc;
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun rc = rfkill_register(rfk);
81*4882a593Smuzhiyun if (rc)
82*4882a593Smuzhiyun goto err_rfkill;
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun platform_set_drvdata(dev, rfk);
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun return 0;
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun err_rfkill:
89*4882a593Smuzhiyun rfkill_destroy(rfk);
90*4882a593Smuzhiyun err_rfk_alloc:
91*4882a593Smuzhiyun tosa_bt_off(data);
92*4882a593Smuzhiyun err_pwr_dir:
93*4882a593Smuzhiyun gpio_free(data->gpio_pwr);
94*4882a593Smuzhiyun err_pwr:
95*4882a593Smuzhiyun err_reset_dir:
96*4882a593Smuzhiyun gpio_free(data->gpio_reset);
97*4882a593Smuzhiyun err_reset:
98*4882a593Smuzhiyun return rc;
99*4882a593Smuzhiyun }
100*4882a593Smuzhiyun
tosa_bt_remove(struct platform_device * dev)101*4882a593Smuzhiyun static int tosa_bt_remove(struct platform_device *dev)
102*4882a593Smuzhiyun {
103*4882a593Smuzhiyun struct tosa_bt_data *data = dev->dev.platform_data;
104*4882a593Smuzhiyun struct rfkill *rfk = platform_get_drvdata(dev);
105*4882a593Smuzhiyun
106*4882a593Smuzhiyun platform_set_drvdata(dev, NULL);
107*4882a593Smuzhiyun
108*4882a593Smuzhiyun if (rfk) {
109*4882a593Smuzhiyun rfkill_unregister(rfk);
110*4882a593Smuzhiyun rfkill_destroy(rfk);
111*4882a593Smuzhiyun }
112*4882a593Smuzhiyun rfk = NULL;
113*4882a593Smuzhiyun
114*4882a593Smuzhiyun tosa_bt_off(data);
115*4882a593Smuzhiyun
116*4882a593Smuzhiyun gpio_free(data->gpio_pwr);
117*4882a593Smuzhiyun gpio_free(data->gpio_reset);
118*4882a593Smuzhiyun
119*4882a593Smuzhiyun return 0;
120*4882a593Smuzhiyun }
121*4882a593Smuzhiyun
122*4882a593Smuzhiyun static struct platform_driver tosa_bt_driver = {
123*4882a593Smuzhiyun .probe = tosa_bt_probe,
124*4882a593Smuzhiyun .remove = tosa_bt_remove,
125*4882a593Smuzhiyun
126*4882a593Smuzhiyun .driver = {
127*4882a593Smuzhiyun .name = "tosa-bt",
128*4882a593Smuzhiyun },
129*4882a593Smuzhiyun };
130*4882a593Smuzhiyun module_platform_driver(tosa_bt_driver);
131*4882a593Smuzhiyun
132*4882a593Smuzhiyun MODULE_LICENSE("GPL");
133*4882a593Smuzhiyun MODULE_AUTHOR("Dmitry Baryshkov");
134*4882a593Smuzhiyun MODULE_DESCRIPTION("Bluetooth built-in chip control");
135