1 files changed, 134 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/tosa-bt.c b/arch/arm/mach-pxa/tosa-bt.c
new file mode 100644
index 000000000..c9541632b
--- /dev/null
+++ b/arch/arm/mach-pxa/tosa-bt.c
@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Bluetooth built-in chip control
+ *
+ * Copyright (c) 2008 Dmitry Baryshkov
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+#include <linux/rfkill.h>
+
+#include "tosa_bt.h"
+
+static void tosa_bt_on(struct tosa_bt_data *data)
+{
+	gpio_set_value(data->gpio_reset, 0);
+	gpio_set_value(data->gpio_pwr, 1);
+	gpio_set_value(data->gpio_reset, 1);
+	mdelay(20);
+	gpio_set_value(data->gpio_reset, 0);
+}
+
+static void tosa_bt_off(struct tosa_bt_data *data)
+{
+	gpio_set_value(data->gpio_reset, 1);
+	mdelay(10);
+	gpio_set_value(data->gpio_pwr, 0);
+	gpio_set_value(data->gpio_reset, 0);
+}
+
+static int tosa_bt_set_block(void *data, bool blocked)
+{
+	pr_info("BT_RADIO going: %s\n", blocked ? "off" : "on");
+
+	if (!blocked) {
+		pr_info("TOSA_BT: going ON\n");
+		tosa_bt_on(data);
+	} else {
+		pr_info("TOSA_BT: going OFF\n");
+		tosa_bt_off(data);
+	}
+
+	return 0;
+}
+
+static const struct rfkill_ops tosa_bt_rfkill_ops = {
+	.set_block = tosa_bt_set_block,
+};
+
+static int tosa_bt_probe(struct platform_device *dev)
+{
+	int rc;
+	struct rfkill *rfk;
+
+	struct tosa_bt_data *data = dev->dev.platform_data;
+
+	rc = gpio_request(data->gpio_reset, "Bluetooth reset");
+	if (rc)
+		goto err_reset;
+	rc = gpio_direction_output(data->gpio_reset, 0);
+	if (rc)
+		goto err_reset_dir;
+	rc = gpio_request(data->gpio_pwr, "Bluetooth power");
+	if (rc)
+		goto err_pwr;
+	rc = gpio_direction_output(data->gpio_pwr, 0);
+	if (rc)
+		goto err_pwr_dir;
+
+	rfk = rfkill_alloc("tosa-bt", &dev->dev, RFKILL_TYPE_BLUETOOTH,
+			   &tosa_bt_rfkill_ops, data);
+	if (!rfk) {
+		rc = -ENOMEM;
+		goto err_rfk_alloc;
+	}
+
+	rc = rfkill_register(rfk);
+	if (rc)
+		goto err_rfkill;
+
+	platform_set_drvdata(dev, rfk);
+
+	return 0;
+
+err_rfkill:
+	rfkill_destroy(rfk);
+err_rfk_alloc:
+	tosa_bt_off(data);
+err_pwr_dir:
+	gpio_free(data->gpio_pwr);
+err_pwr:
+err_reset_dir:
+	gpio_free(data->gpio_reset);
+err_reset:
+	return rc;
+}
+
+static int tosa_bt_remove(struct platform_device *dev)
+{
+	struct tosa_bt_data *data = dev->dev.platform_data;
+	struct rfkill *rfk = platform_get_drvdata(dev);
+
+	platform_set_drvdata(dev, NULL);
+
+	if (rfk) {
+		rfkill_unregister(rfk);
+		rfkill_destroy(rfk);
+	}
+	rfk = NULL;
+
+	tosa_bt_off(data);
+
+	gpio_free(data->gpio_pwr);
+	gpio_free(data->gpio_reset);
+
+	return 0;
+}
+
+static struct platform_driver tosa_bt_driver = {
+	.probe = tosa_bt_probe,
+	.remove = tosa_bt_remove,
+
+	.driver = {
+		.name = "tosa-bt",
+	},
+};
+module_platform_driver(tosa_bt_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Dmitry Baryshkov");
+MODULE_DESCRIPTION("Bluetooth built-in chip control");