1 files changed, 306 insertions, 0 deletions

diff --git a/drivers/platform/x86/ideapad_acpi.c b/drivers/platform/x86/ideapad_acpi.c
new file mode 100644
index 000000000000..798496353e8c
--- /dev/null
+++ b/drivers/platform/x86/ideapad_acpi.c
@@ -0,0 +1,306 @@
+/*
+ *  ideapad_acpi.c - Lenovo IdeaPad ACPI Extras
+ *
+ *  Copyright © 2010 Intel Corporation
+ *  Copyright © 2010 David Woodhouse <dwmw2@infradead.org>
+ *
+ *  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., 51 Franklin Street, Fifth Floor, Boston, MA
+ *  02110-1301, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+#include <linux/rfkill.h>
+
+#define IDEAPAD_DEV_CAMERA	0
+#define IDEAPAD_DEV_WLAN	1
+#define IDEAPAD_DEV_BLUETOOTH	2
+#define IDEAPAD_DEV_3G		3
+#define IDEAPAD_DEV_KILLSW	4
+
+struct ideapad_private {
+	struct rfkill *rfk[5];
+};
+
+static struct {
+	char *name;
+	int type;
+} ideapad_rfk_data[] = {
+	/* camera has no rfkill */
+	{ "ideapad_wlan",	RFKILL_TYPE_WLAN },
+	{ "ideapad_bluetooth",	RFKILL_TYPE_BLUETOOTH },
+	{ "ideapad_3g",		RFKILL_TYPE_WWAN },
+	{ "ideapad_killsw",	RFKILL_TYPE_WLAN }
+};
+
+static int ideapad_dev_exists(int device)
+{
+	acpi_status status;
+	union acpi_object in_param;
+	struct acpi_object_list input = { 1, &in_param };
+	struct acpi_buffer output;
+	union acpi_object out_obj;
+
+	output.length = sizeof(out_obj);
+	output.pointer = &out_obj;
+
+	in_param.type = ACPI_TYPE_INTEGER;
+	in_param.integer.value = device + 1;
+
+	status = acpi_evaluate_object(NULL, "\\_SB_.DECN", &input, &output);
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_WARNING "IdeaPAD \\_SB_.DECN method failed %d. Is this an IdeaPAD?\n", status);
+		return -ENODEV;
+	}
+	if (out_obj.type != ACPI_TYPE_INTEGER) {
+		printk(KERN_WARNING "IdeaPAD \\_SB_.DECN method returned unexpected type\n");
+		return -ENODEV;
+	}
+	return out_obj.integer.value;
+}
+
+static int ideapad_dev_get_state(int device)
+{
+	acpi_status status;
+	union acpi_object in_param;
+	struct acpi_object_list input = { 1, &in_param };
+	struct acpi_buffer output;
+	union acpi_object out_obj;
+
+	output.length = sizeof(out_obj);
+	output.pointer = &out_obj;
+
+	in_param.type = ACPI_TYPE_INTEGER;
+	in_param.integer.value = device + 1;
+
+	status = acpi_evaluate_object(NULL, "\\_SB_.GECN", &input, &output);
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_WARNING "IdeaPAD \\_SB_.GECN method failed %d\n", status);
+		return -ENODEV;
+	}
+	if (out_obj.type != ACPI_TYPE_INTEGER) {
+		printk(KERN_WARNING "IdeaPAD \\_SB_.GECN method returned unexpected type\n");
+		return -ENODEV;
+	}
+	return out_obj.integer.value;
+}
+
+static int ideapad_dev_set_state(int device, int state)
+{
+	acpi_status status;
+	union acpi_object in_params[2];
+	struct acpi_object_list input = { 2, in_params };
+
+	in_params[0].type = ACPI_TYPE_INTEGER;
+	in_params[0].integer.value = device + 1;
+	in_params[1].type = ACPI_TYPE_INTEGER;
+	in_params[1].integer.value = state;
+
+	status = acpi_evaluate_object(NULL, "\\_SB_.SECN", &input, NULL);
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_WARNING "IdeaPAD \\_SB_.SECN method failed %d\n", status);
+		return -ENODEV;
+	}
+	return 0;
+}
+static ssize_t show_ideapad_cam(struct device *dev,
+				struct device_attribute *attr,
+				char *buf)
+{
+	int state = ideapad_dev_get_state(IDEAPAD_DEV_CAMERA);
+	if (state < 0)
+		return state;
+
+	return sprintf(buf, "%d\n", state);
+}
+
+static ssize_t store_ideapad_cam(struct device *dev,
+				 struct device_attribute *attr,
+				 const char *buf, size_t count)
+{
+	int ret, state;
+
+	if (!count)
+		return 0;
+	if (sscanf(buf, "%i", &state) != 1)
+		return -EINVAL;
+	ret = ideapad_dev_set_state(IDEAPAD_DEV_CAMERA, !!state);
+	if (ret < 0)
+		return ret;
+	return count;
+}
+
+static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
+
+static int ideapad_rfk_set(void *data, bool blocked)
+{
+	int device = (unsigned long)data;
+
+	if (device == IDEAPAD_DEV_KILLSW)
+		return -EINVAL;
+	return ideapad_dev_set_state(device, !blocked);
+}
+
+static struct rfkill_ops ideapad_rfk_ops = {
+	.set_block = ideapad_rfk_set,
+};
+
+static void ideapad_sync_rfk_state(struct acpi_device *adevice)
+{
+	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
+	int hw_blocked = !ideapad_dev_get_state(IDEAPAD_DEV_KILLSW);
+	int i;
+
+	rfkill_set_hw_state(priv->rfk[IDEAPAD_DEV_KILLSW], hw_blocked);
+	for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++)
+		if (priv->rfk[i])
+			rfkill_set_hw_state(priv->rfk[i], hw_blocked);
+	if (hw_blocked)
+		return;
+
+	for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++)
+		if (priv->rfk[i])
+			rfkill_set_sw_state(priv->rfk[i], !ideapad_dev_get_state(i));
+}
+
+static int ideapad_register_rfkill(struct acpi_device *adevice, int dev)
+{
+	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
+	int ret;
+
+	priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev-1].name, &adevice->dev,
+				      ideapad_rfk_data[dev-1].type, &ideapad_rfk_ops,
+				      (void *)(long)dev);
+	if (!priv->rfk[dev])
+		return -ENOMEM;
+
+	ret = rfkill_register(priv->rfk[dev]);
+	if (ret) {
+		rfkill_destroy(priv->rfk[dev]);
+		return ret;
+	}
+	return 0;
+}
+
+static void ideapad_unregister_rfkill(struct acpi_device *adevice, int dev)
+{
+	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
+
+	if (!priv->rfk[dev])
+		return;
+
+	rfkill_unregister(priv->rfk[dev]);
+	rfkill_destroy(priv->rfk[dev]);
+}
+
+static const struct acpi_device_id ideapad_device_ids[] = {
+	{ "VPC2004", 0},
+	{ "", 0},
+};
+MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
+
+static int ideapad_acpi_add(struct acpi_device *adevice)
+{
+	int i;
+	int devs_present[5];
+	struct ideapad_private *priv;
+
+	for (i = IDEAPAD_DEV_CAMERA; i < IDEAPAD_DEV_KILLSW; i++) {
+		devs_present[i] = ideapad_dev_exists(i);
+		if (devs_present[i] < 0)
+			return devs_present[i];
+	}
+
+	/* The hardware switch is always present */
+	devs_present[IDEAPAD_DEV_KILLSW] = 1;
+
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	if (devs_present[IDEAPAD_DEV_CAMERA]) {
+		int ret = device_create_file(&adevice->dev, &dev_attr_camera_power);
+		if (ret) {
+			kfree(priv);
+			return ret;
+		}
+	}
+
+	dev_set_drvdata(&adevice->dev, priv);
+	for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++) {
+		if (!devs_present[i])
+			continue;
+
+		ideapad_register_rfkill(adevice, i);
+	}
+	ideapad_sync_rfk_state(adevice);
+	return 0;
+}
+
+static int ideapad_acpi_remove(struct acpi_device *adevice, int type)
+{
+	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
+	int i;
+
+	device_remove_file(&adevice->dev, &dev_attr_camera_power);
+
+	for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++)
+		ideapad_unregister_rfkill(adevice, i);
+
+	dev_set_drvdata(&adevice->dev, NULL);
+	kfree(priv);
+	return 0;
+}
+
+static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
+{
+	ideapad_sync_rfk_state(adevice);
+}
+
+static struct acpi_driver ideapad_acpi_driver = {
+	.name = "ideapad_acpi",
+	.class = "IdeaPad",
+	.ids = ideapad_device_ids,
+	.ops.add = ideapad_acpi_add,
+	.ops.remove = ideapad_acpi_remove,
+	.ops.notify = ideapad_acpi_notify,
+	.owner = THIS_MODULE,
+};
+
+
+static int __init ideapad_acpi_module_init(void)
+{
+	acpi_bus_register_driver(&ideapad_acpi_driver);
+
+	return 0;
+}
+
+
+static void __exit ideapad_acpi_module_exit(void)
+{
+	acpi_bus_unregister_driver(&ideapad_acpi_driver);
+
+}
+
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_DESCRIPTION("IdeaPad ACPI Extras");
+MODULE_LICENSE("GPL");
+
+module_init(ideapad_acpi_module_init);
+module_exit(ideapad_acpi_module_exit);