1 files changed, 288 insertions, 0 deletions
diff --git a/net/rfkill/wl127x-rfkill.c b/net/rfkill/wl127x-rfkill.c
new file mode 100644
index 00000000000..9d15d3996a1
--- /dev/null
+++ b/net/rfkill/wl127x-rfkill.c
@@ -0,0 +1,288 @@
+/*
+ * Bluetooth TI wl127x rfkill power control via GPIO
+ *
+ * Copyright (C) 2009 Motorola, Inc.
+ * Copyright (C) 2008 Texas Instruments
+ * Initial code: Pavan Savoy <pavan.savoy@gmail.com> (wl127x_power.c)
+ *
+ *  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/platform_device.h>
+#include <linux/wl127x-rfkill.h>
+#include <linux/delay.h>
+
+static int wl127x_bt_rfkill_set_power(void *data, bool blocked)
+{
+	struct wl127x_rfkill_platform_data *pdata =
+		(struct wl127x_rfkill_platform_data *) data;
+	int nshutdown_gpio = pdata->bt_nshutdown_gpio;
+
+	if (blocked) {
+		gpio_set_value(nshutdown_gpio, 0);
+		if (pdata->bt_hw_disable)
+			pdata->bt_hw_disable();
+	} else {
+		if (pdata->bt_hw_enable)
+			pdata->bt_hw_enable();
+		gpio_set_value(nshutdown_gpio, 1);
+	}
+	return 0;
+}
+
+static int wl127x_fm_rfkill_set_power(void *data, bool blocked)
+{
+	int nshutdown_gpio = (int) data;
+
+	if (blocked)
+		gpio_set_value(nshutdown_gpio, 0);
+	else
+		gpio_set_value(nshutdown_gpio, 1);
+
+	return 0;
+}
+
+static const struct rfkill_ops wl127x_bt_rfkill_ops = {
+	.set_block = wl127x_bt_rfkill_set_power,
+};
+
+static const struct rfkill_ops wl127x_fm_rfkill_ops = {
+	.set_block = wl127x_fm_rfkill_set_power,
+};
+
+
+
+/**
+Added to reset the BT chip after Ram download
+*/
+static ssize_t reset_wl18xx_chip(struct device *dev,
+					   struct device_attribute
+					   *attr, const char *buf, size_t size)
+{
+
+	int bt_enable_gpio;
+	printk(KERN_DEBUG  "Calling reset_wl18xx_chip \n");
+
+	/* TODO, rework once device tree is pulled in */
+	/* bt_enable_gpio = get_gpio_by_name("bt_reset_b"); */
+	bt_enable_gpio = 83;
+
+	printk(KERN_DEBUG "bt_enable_gpio = %d\n", bt_enable_gpio);
+
+	if (bt_enable_gpio < 0) {
+
+		printk(KERN_DEBUG "reset_wl18xx_chip: cannot retrieve bt_reset_b gpio from device tree\n");
+		bt_enable_gpio = -1;
+		return -EINVAL;
+	}
+
+	gpio_set_value(bt_enable_gpio, 0);
+	msleep(5);
+	gpio_set_value(bt_enable_gpio, 1);
+	printk(KERN_DEBUG " successfully set the value\n");
+
+	return 0;
+
+}
+
+static DEVICE_ATTR(reset_vio, 0644, NULL, reset_wl18xx_chip);
+
+
+static int wl127x_rfkill_probe(struct platform_device *pdev)
+{
+	int rc = 0;
+	bool fm_deinit_required_flag = false;
+	struct wl127x_rfkill_platform_data *pdata = pdev->dev.platform_data;
+
+	if (pdata->bt_nshutdown_gpio >= 0) {
+		bool default_blocked = true;  /* power off */
+		printk(KERN_DEBUG "Entered the bt enable part \n");
+		rc = gpio_request(pdata->bt_nshutdown_gpio,
+				  "wl127x_bt_nshutdown_gpio");
+		if (unlikely(rc))
+			return rc;
+
+		rc = gpio_direction_output(pdata->bt_nshutdown_gpio, 0);
+		if (unlikely(rc)) {
+			printk(KERN_ERR "wl127x_rfkill_probe failure could not set output direction for gpio bt_nshutdown_gpio \n");
+			goto bt_err_gpio_direction;
+		}
+
+		if (pdata->bt_hw_init)
+			rc = pdata->bt_hw_init();
+		if (unlikely(rc)) {
+			printk(KERN_ERR "wl127x_rfkill_probe failure could not init hardware \n");
+			goto bt_err_gpio_direction;
+		}
+
+
+		wl127x_bt_rfkill_set_power((void *)pdata, default_blocked);
+
+		pdata->rfkill[WL127X_BLUETOOTH] = rfkill_alloc(
+				"wl127x Bluetooth", &pdev->dev,
+				RFKILL_TYPE_BLUETOOTH, &wl127x_bt_rfkill_ops,
+				(void *)pdata);
+		if (unlikely(!pdata->rfkill[WL127X_BLUETOOTH])) {
+			printk(KERN_ERR "wl127x_rfkill_probe failure could not allocate memory \n");
+			rc = -ENOMEM;
+			goto bt_err_rfkill_alloc;
+		}
+
+		rfkill_set_states(pdata->rfkill[WL127X_BLUETOOTH],
+				default_blocked, false);
+
+		rc = rfkill_register(pdata->rfkill[WL127X_BLUETOOTH]);
+		if (unlikely(rc)) {
+			printk(KERN_ERR "wl127x_rfkill_probe failure could to register BT \n");
+			goto bt_err_rfkill_register;
+		}
+
+	}
+
+	if (pdata->fm_enable_gpio >= 0) {
+		bool default_blocked = true;  /* power off */
+		printk(KERN_DEBUG "Entered the fm enable part \n");
+		rc = gpio_request(pdata->fm_enable_gpio,
+				  "wl127x_fm_enable_gpio");
+		if (unlikely(rc))
+			return rc;
+
+		rc = gpio_direction_output(pdata->fm_enable_gpio, 0);
+		if (unlikely(rc)) {
+			printk(KERN_ERR "wl127x_rfkill_probe failure could not set output direction for gpio fm_enable_gpio \n");
+			goto fm_err_gpio_direction;
+		}
+
+		wl127x_fm_rfkill_set_power((void *)pdata->fm_enable_gpio,
+				default_blocked);
+
+		pdata->rfkill[WL127X_FM] = rfkill_alloc("wl127x FM Radio",
+				&pdev->dev, RFKILL_TYPE_FM,
+				&wl127x_fm_rfkill_ops,
+				(void *)pdata->fm_enable_gpio);
+		if (unlikely(!pdata->rfkill[WL127X_FM])) {
+			printk(KERN_ERR "wl127x_rfkill_probe failure could not allocate memory for fm\n");
+			rc = -ENOMEM;
+			goto fm_err_gpio_direction;
+
+		}
+
+		rfkill_set_states(pdata->rfkill[WL127X_FM], default_blocked,
+				false);
+
+		rc = rfkill_register(pdata->rfkill[WL127X_FM]);
+		if (unlikely(rc)) {
+			printk(KERN_ERR "wl127x_rfkill_probe failure could to register FM \n");
+			goto fm_err_rfkill_register;
+		}
+
+		fm_deinit_required_flag = true;
+	}
+
+	/* Create device file to expose interface to user space to
+	reset the vio of BT, this should be done independent of whether
+	BT/FM is initialised as both run on the same w18xx chip
+	*/
+	if (device_create_file(&pdev->dev, &dev_attr_reset_vio)) {
+		printk(KERN_DEBUG  "Error creating sys entry for reset vio\n");
+		rc = -1;
+		goto bt_err_rfkill_register;
+	}
+
+	goto done;
+
+	/* Clean up for BT generic registration */
+bt_err_rfkill_register:
+	rfkill_destroy(pdata->rfkill[WL127X_BLUETOOTH]);
+bt_err_rfkill_alloc:
+	if (pdata->bt_hw_release)
+		pdata->bt_hw_release();
+bt_err_gpio_direction:
+	if (pdata->bt_nshutdown_gpio >= 0)
+		gpio_free(pdata->bt_nshutdown_gpio);
+
+	if (fm_deinit_required_flag == false)
+		goto done;
+
+	fm_deinit_required_flag = false;
+
+	/* Clean up for FM generic registration
+	do not clean up BT process as we still want to use BT
+	*/
+fm_err_rfkill_register:
+	rfkill_destroy(pdata->rfkill[WL127X_FM]);
+fm_err_gpio_direction:
+	gpio_free(pdata->fm_enable_gpio);
+
+done:
+		return rc;
+}
+
+static int wl127x_rfkill_remove(struct platform_device *pdev)
+{
+	struct wl127x_rfkill_platform_data *pdata = pdev->dev.platform_data;
+
+	if (pdata->bt_nshutdown_gpio >= 0) {
+		rfkill_unregister(pdata->rfkill[WL127X_BLUETOOTH]);
+		rfkill_destroy(pdata->rfkill[WL127X_BLUETOOTH]);
+		if (pdata->bt_hw_release)
+			pdata->bt_hw_release();
+		gpio_free(pdata->bt_nshutdown_gpio);
+	}
+
+
+	if (pdata->fm_enable_gpio >= 0) {
+		rfkill_unregister(pdata->rfkill[WL127X_FM]);
+		rfkill_destroy(pdata->rfkill[WL127X_FM]);
+		gpio_free(pdata->fm_enable_gpio);
+	}
+
+	/* remove the sys fs file created as part of probe*/
+	device_remove_file(&pdev->dev, &dev_attr_reset_vio);
+
+	return 0;
+}
+
+static struct platform_driver wl127x_rfkill_platform_driver = {
+	.probe = wl127x_rfkill_probe,
+	.remove = wl127x_rfkill_remove,
+	.driver = {
+		   .name = "wl127x-rfkill",
+		   .owner = THIS_MODULE,
+		   },
+};
+
+static int __init wl127x_rfkill_init(void)
+{
+	return platform_driver_register(&wl127x_rfkill_platform_driver);
+}
+
+static void __exit wl127x_rfkill_exit(void)
+{
+	platform_driver_unregister(&wl127x_rfkill_platform_driver);
+}
+
+module_init(wl127x_rfkill_init);
+module_exit(wl127x_rfkill_exit);
+
+MODULE_ALIAS("platform:wl127x");
+MODULE_DESCRIPTION("wl127x-rfkill");
+MODULE_AUTHOR("Motorola");
+MODULE_LICENSE("GPL");