[ARM] 5150/1: Tosa: support built-in bluetooth power-up

The driver is pretty much generic and will be later shared with
a few other devices, like hx4700 ipaq.

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 150 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 000000000000..7d8505466e54
--- /dev/null
+++ b/arch/arm/mach-pxa/tosa-bt.c
@@ -0,0 +1,150 @@
+/*
+ * Bluetooth built-in chip control
+ *
+ * Copyright (c) 2008 Dmitry Baryshkov
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#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 <asm/arch/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_toggle_radio(void *data, enum rfkill_state state)
+{
+        pr_info("BT_RADIO going: %s\n",
+                        state == RFKILL_STATE_ON ? "on" : "off");
+
+        if (state == RFKILL_STATE_ON) {
+                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 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_allocate(&dev->dev, RFKILL_TYPE_BLUETOOTH);
+        if (!rfk) {
+                rc = -ENOMEM;
+                goto err_rfk_alloc;
+        }
+
+        rfk->name = "tosa-bt";
+        rfk->toggle_radio = tosa_bt_toggle_radio;
+        rfk->data = data;
+#ifdef CONFIG_RFKILL_LEDS
+        rfk->led_trigger.name = "tosa-bt";
+#endif
+
+        rc = rfkill_register(rfk);
+        if (rc)
+                goto err_rfkill;
+
+        platform_set_drvdata(dev, rfk);
+
+        return 0;
+
+err_rfkill:
+        if (rfk)
+                rfkill_free(rfk);
+        rfk = NULL;
+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 __devexit 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);
+        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 = __devexit_p(tosa_bt_remove),
+
+        .driver = {
+                .name = "tosa-bt",
+                .owner = THIS_MODULE,
+        },
+};
+
+
+static int __init tosa_bt_init(void)
+{
+        return platform_driver_register(&tosa_bt_driver);
+}
+
+static void __exit tosa_bt_exit(void)
+{
+        platform_driver_unregister(&tosa_bt_driver);
+}
+
+module_init(tosa_bt_init);
+module_exit(tosa_bt_exit);