142 lines
3 KiB
C
142 lines
3 KiB
C
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// SPDX-License-Identifier: GPL-1.0+
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//
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// Copyright (c) Arnaud Patard <arnaud.patard@rtp-net.org>
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//
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// S3C2410 bluetooth "driver"
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/delay.h>
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#include <linux/string.h>
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#include <linux/ctype.h>
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#include <linux/leds.h>
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#include <linux/gpio.h>
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#include <linux/rfkill.h>
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#include <plat/gpio-cfg.h>
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#include <mach/hardware.h>
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#include <mach/regs-gpio.h>
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#include <mach/gpio-samsung.h>
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#include "h1940.h"
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#define DRV_NAME "h1940-bt"
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/* Bluetooth control */
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static void h1940bt_enable(int on)
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{
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if (on) {
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/* Power on the chip */
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gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 1);
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/* Reset the chip */
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mdelay(10);
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gpio_set_value(S3C2410_GPH(1), 1);
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mdelay(10);
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gpio_set_value(S3C2410_GPH(1), 0);
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h1940_led_blink_set(NULL, GPIO_LED_BLINK, NULL, NULL);
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}
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else {
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gpio_set_value(S3C2410_GPH(1), 1);
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mdelay(10);
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gpio_set_value(S3C2410_GPH(1), 0);
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mdelay(10);
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gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 0);
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h1940_led_blink_set(NULL, GPIO_LED_NO_BLINK_LOW, NULL, NULL);
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}
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}
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static int h1940bt_set_block(void *data, bool blocked)
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{
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h1940bt_enable(!blocked);
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return 0;
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}
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static const struct rfkill_ops h1940bt_rfkill_ops = {
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.set_block = h1940bt_set_block,
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};
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static int h1940bt_probe(struct platform_device *pdev)
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{
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struct rfkill *rfk;
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int ret = 0;
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ret = gpio_request(S3C2410_GPH(1), dev_name(&pdev->dev));
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if (ret) {
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dev_err(&pdev->dev, "could not get GPH1\n");
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return ret;
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}
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ret = gpio_request(H1940_LATCH_BLUETOOTH_POWER, dev_name(&pdev->dev));
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if (ret) {
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gpio_free(S3C2410_GPH(1));
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dev_err(&pdev->dev, "could not get BT_POWER\n");
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return ret;
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}
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/* Configures BT serial port GPIOs */
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s3c_gpio_cfgpin(S3C2410_GPH(0), S3C2410_GPH0_nCTS0);
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s3c_gpio_setpull(S3C2410_GPH(0), S3C_GPIO_PULL_NONE);
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s3c_gpio_cfgpin(S3C2410_GPH(1), S3C2410_GPIO_OUTPUT);
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s3c_gpio_setpull(S3C2410_GPH(1), S3C_GPIO_PULL_NONE);
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s3c_gpio_cfgpin(S3C2410_GPH(2), S3C2410_GPH2_TXD0);
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s3c_gpio_setpull(S3C2410_GPH(2), S3C_GPIO_PULL_NONE);
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s3c_gpio_cfgpin(S3C2410_GPH(3), S3C2410_GPH3_RXD0);
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s3c_gpio_setpull(S3C2410_GPH(3), S3C_GPIO_PULL_NONE);
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rfk = rfkill_alloc(DRV_NAME, &pdev->dev, RFKILL_TYPE_BLUETOOTH,
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&h1940bt_rfkill_ops, NULL);
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if (!rfk) {
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ret = -ENOMEM;
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goto err_rfk_alloc;
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}
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ret = rfkill_register(rfk);
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if (ret)
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goto err_rfkill;
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platform_set_drvdata(pdev, rfk);
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return 0;
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err_rfkill:
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rfkill_destroy(rfk);
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err_rfk_alloc:
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return ret;
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}
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static int h1940bt_remove(struct platform_device *pdev)
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{
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struct rfkill *rfk = platform_get_drvdata(pdev);
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platform_set_drvdata(pdev, NULL);
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gpio_free(S3C2410_GPH(1));
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if (rfk) {
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rfkill_unregister(rfk);
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rfkill_destroy(rfk);
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}
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rfk = NULL;
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h1940bt_enable(0);
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return 0;
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}
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static struct platform_driver h1940bt_driver = {
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.driver = {
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.name = DRV_NAME,
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},
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.probe = h1940bt_probe,
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.remove = h1940bt_remove,
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};
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module_platform_driver(h1940bt_driver);
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MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
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MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip");
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MODULE_LICENSE("GPL");
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