misc: rfkill: add rfkill driver for Murata LBEE9QMBC module

Change-Id: Ib2d277392f9c2e2aa0c3ecb3e3c1f936cd5150b0

4 files changed, 178 insertions, 0 deletions

diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index c00355bcd097..d6e8760e136b 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -261,6 +261,14 @@ config UID_STAT
 	bool "UID based statistics tracking exported to /proc/uid_stat"
 	default n
 
+config LBEE9QMB_RFKILL
+	tristate "Bluetooth power control driver for Murata lbee9qmbc"
+	depends on RFKILL
+	default n
+	---help---
+	 Creates an rfkill entry in sysfs for power control of
+	 Murata lbee9qmbc Bluetooth+WiFi chips.
+
 config WL127X_RFKILL
 	tristate "Bluetooth power control driver for TI wl127x"
 	depends on RFKILL
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index b24537deeef2..a5bb197669df 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -26,5 +26,6 @@ obj-$(CONFIG_UID_STAT)		+= uid_stat.o
 obj-$(CONFIG_C2PORT)		+= c2port/
 obj-y				+= eeprom/
 obj-y				+= cb710/
+obj-$(CONFIG_LBEE9QMB_RFKILL)	+= lbee9qmb-rfkill.o
 obj-$(CONFIG_WL127X_RFKILL)	+= wl127x-rfkill.o
 obj-$(CONFIG_APANIC)		+= apanic.o
diff --git a/drivers/misc/lbee9qmb-rfkill.c b/drivers/misc/lbee9qmb-rfkill.c
new file mode 100644
index 000000000000..0042157c7cf2
--- /dev/null
+++ b/drivers/misc/lbee9qmb-rfkill.c
@@ -0,0 +1,140 @@
+/*
+ * Bluetooth+WiFi Murata LBEE19QMBC rfkill power control via GPIO
+ *
+ * Copyright (C) 2010 NVIDIA Corporation
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/gpio.h>
+#include <linux/rfkill.h>
+#include <linux/delay.h>
+#include <linux/regulator/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/lbee9qmb-rfkill.h>
+
+static int lbee9qmb_rfkill_set_power(void *data, bool blocked)
+{
+	struct platform_device *pdev = data;
+	struct lbee9qmb_platform_data *plat = pdev->dev.platform_data;
+	struct regulator *regulator;
+
+	regulator = regulator_get(&pdev->dev, "Vdd");
+
+	if (IS_ERR(regulator)) {
+		dev_err(&pdev->dev, "Unable to get regulator Vdd\n");
+		return PTR_ERR(regulator);
+	}
+
+	if (!blocked) {
+		regulator_enable(regulator);
+		gpio_set_value(plat->gpio_reset, 0);
+		msleep(5);
+		gpio_set_value(plat->gpio_reset, 1);
+	} else {
+		gpio_set_value(plat->gpio_reset, 0);
+		regulator_disable(regulator);
+	}
+
+	regulator_put(regulator);
+	return 0;
+}
+
+static struct rfkill_ops lbee9qmb_rfkill_ops = {
+	.set_block = lbee9qmb_rfkill_set_power,
+};
+
+static int lbee9qmb_rfkill_probe(struct platform_device *pdev)
+{
+	struct lbee9qmb_platform_data *plat = pdev->dev.platform_data;
+	struct rfkill *rfkill;
+
+	int rc;
+
+	if (!plat) {
+		dev_err(&pdev->dev, "no platform data\n");
+		return -ENOSYS;
+	}
+
+	rc = gpio_request(plat->gpio_reset, "lbee9qmb_reset");
+	if (rc < 0) {
+		dev_err(&pdev->dev, "gpio_request failed\n");
+		return rc;
+	}
+
+	rfkill = rfkill_alloc("lbee9qmb-rfkill", &pdev->dev,
+			RFKILL_TYPE_BLUETOOTH, &lbee9qmb_rfkill_ops, pdev);
+	if (!rfkill) {
+		rc = -ENOMEM;
+		goto fail_gpio;
+	}
+	platform_set_drvdata(pdev, rfkill);
+	gpio_direction_output(plat->gpio_reset, 0);
+	
+	rc = rfkill_register(rfkill);
+	if (rc < 0)
+		goto fail_alloc;
+
+	return 0;
+
+fail_alloc:
+	rfkill_destroy(rfkill);
+fail_gpio:
+	gpio_free(plat->gpio_reset);
+	return rc;
+		
+}
+
+static int lbee9qmb_rfkill_remove(struct platform_device *pdev)
+{
+	struct lbee9qmb_platform_data *plat = pdev->dev.platform_data;
+	struct rfkill *rfkill = platform_get_drvdata(pdev);
+
+	rfkill_unregister(rfkill);
+	rfkill_destroy(rfkill);
+	gpio_free(plat->gpio_reset);
+
+	return 0;
+	
+}
+
+static struct platform_driver lbee9qmb_rfkill_driver = {
+	.probe = lbee9qmb_rfkill_probe,
+	.remove = lbee9qmb_rfkill_remove,
+	.driver = {
+		.name = "lbee9qmb-rfkill",
+		.owner = THIS_MODULE,
+	},
+};
+
+static int __init lbee9qmb_rfkill_init(void)
+{
+	return platform_driver_register(&lbee9qmb_rfkill_driver);
+}
+
+static void __exit lbee9qmb_rfkill_exit(void)
+{
+	platform_driver_unregister(&lbee9qmb_rfkill_driver);
+}
+
+module_init(lbee9qmb_rfkill_init);
+module_exit(lbee9qmb_rfkill_exit);
+
+MODULE_DESCRIPTION("Murata LBEE9QMBC rfkill");
+MODULE_AUTHOR("NVIDIA");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/lbee9qmb-rfkill.h b/include/linux/lbee9qmb-rfkill.h
new file mode 100644
index 000000000000..24db7d495242
--- /dev/null
+++ b/include/linux/lbee9qmb-rfkill.h
@@ -0,0 +1,29 @@
+/*
+ * Bluetooth+WiFi Murata LBEE19QMBC rfkill power control via GPIO
+ *
+ * Copyright (C) 2010 NVIDIA Corporation
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#ifndef __LBEE9QMB_RFKILL_H
+#define __LBEE9QMB_RFKILL_H
+
+struct lbee9qmb_platform_data {
+	int gpio_reset;
+};
+
+#endif