1 // SPDX-License-Identifier: GPL-1.0+
5 // S3C2410 bluetooth "driver"
7 #include <linux/module.h>
8 #include <linux/platform_device.h>
9 #include <linux/delay.h>
10 #include <linux/string.h>
11 #include <linux/ctype.h>
12 #include <linux/leds.h>
13 #include <linux/gpio.h>
14 #include <linux/rfkill.h>
17 #include "regs-gpio.h"
18 #include "gpio-samsung.h"
22 #define DRV_NAME "h1940-bt"
24 /* Bluetooth control */
25 static void h1940bt_enable(int on)
28 /* Power on the chip */
29 gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 1);
33 gpio_set_value(S3C2410_GPH(1), 1);
35 gpio_set_value(S3C2410_GPH(1), 0);
37 h1940_led_blink_set(NULL, GPIO_LED_BLINK, NULL, NULL);
40 gpio_set_value(S3C2410_GPH(1), 1);
42 gpio_set_value(S3C2410_GPH(1), 0);
44 gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 0);
46 h1940_led_blink_set(NULL, GPIO_LED_NO_BLINK_LOW, NULL, NULL);
50 static int h1940bt_set_block(void *data, bool blocked)
52 h1940bt_enable(!blocked);
56 static const struct rfkill_ops h1940bt_rfkill_ops = {
57 .set_block = h1940bt_set_block,
60 static int h1940bt_probe(struct platform_device *pdev)
65 ret = gpio_request(S3C2410_GPH(1), dev_name(&pdev->dev));
67 dev_err(&pdev->dev, "could not get GPH1\n");
71 ret = gpio_request(H1940_LATCH_BLUETOOTH_POWER, dev_name(&pdev->dev));
73 gpio_free(S3C2410_GPH(1));
74 dev_err(&pdev->dev, "could not get BT_POWER\n");
78 /* Configures BT serial port GPIOs */
79 s3c_gpio_cfgpin(S3C2410_GPH(0), S3C2410_GPH0_nCTS0);
80 s3c_gpio_setpull(S3C2410_GPH(0), S3C_GPIO_PULL_NONE);
81 s3c_gpio_cfgpin(S3C2410_GPH(1), S3C2410_GPIO_OUTPUT);
82 s3c_gpio_setpull(S3C2410_GPH(1), S3C_GPIO_PULL_NONE);
83 s3c_gpio_cfgpin(S3C2410_GPH(2), S3C2410_GPH2_TXD0);
84 s3c_gpio_setpull(S3C2410_GPH(2), S3C_GPIO_PULL_NONE);
85 s3c_gpio_cfgpin(S3C2410_GPH(3), S3C2410_GPH3_RXD0);
86 s3c_gpio_setpull(S3C2410_GPH(3), S3C_GPIO_PULL_NONE);
88 rfk = rfkill_alloc(DRV_NAME, &pdev->dev, RFKILL_TYPE_BLUETOOTH,
89 &h1940bt_rfkill_ops, NULL);
95 ret = rfkill_register(rfk);
99 platform_set_drvdata(pdev, rfk);
109 static int h1940bt_remove(struct platform_device *pdev)
111 struct rfkill *rfk = platform_get_drvdata(pdev);
113 platform_set_drvdata(pdev, NULL);
114 gpio_free(S3C2410_GPH(1));
117 rfkill_unregister(rfk);
128 static struct platform_driver h1940bt_driver = {
132 .probe = h1940bt_probe,
133 .remove = h1940bt_remove,
136 module_platform_driver(h1940bt_driver);
139 MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip");
140 MODULE_LICENSE("GPL");