--- /dev/null
+/*
+ * 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
+
+static struct rfkill *ideapad_rfkill[5];
+
+static const char *ideapad_rfk_names[] = {
+ "ideapad_camera", "ideapad_wlan", "ideapad_bluetooth", "ideapad_3g", "ideapad_rfkill"
+};
+static const int ideapad_rfk_types[] = {
+ 0, RFKILL_TYPE_WLAN, RFKILL_TYPE_BLUETOOTH, RFKILL_TYPE_WWAN, 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(void)
+{
+ int hw_blocked = !ideapad_dev_get_state(IDEAPAD_DEV_KILLSW);
+ int i;
+
+ rfkill_set_hw_state(ideapad_rfkill[IDEAPAD_DEV_KILLSW], hw_blocked);
+ for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++)
+ if (ideapad_rfkill[i])
+ rfkill_set_hw_state(ideapad_rfkill[i], hw_blocked);
+ if (hw_blocked)
+ return;
+
+ for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++)
+ if (ideapad_rfkill[i])
+ rfkill_set_sw_state(ideapad_rfkill[i], !ideapad_dev_get_state(i));
+}
+
+static int ideapad_register_rfkill(struct acpi_device *device, int dev)
+{
+ int ret;
+
+ ideapad_rfkill[dev] = rfkill_alloc(ideapad_rfk_names[dev], &device->dev,
+ ideapad_rfk_types[dev], &ideapad_rfk_ops,
+ (void *)(long)dev);
+ if (!ideapad_rfkill[dev])
+ return -ENOMEM;
+
+ ret = rfkill_register(ideapad_rfkill[dev]);
+ if (ret) {
+ rfkill_destroy(ideapad_rfkill[dev]);
+ return ret;
+ }
+ return 0;
+}
+
+static void ideapad_unregister_rfkill(int dev)
+{
+ if (!ideapad_rfkill[dev])
+ return;
+
+ rfkill_unregister(ideapad_rfkill[dev]);
+ rfkill_destroy(ideapad_rfkill[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 *device)
+{
+ int i;
+ int devs_present[5];
+
+ 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;
+
+ if (devs_present[IDEAPAD_DEV_CAMERA]) {
+ int ret = device_create_file(&device->dev, &dev_attr_camera_power);
+ if (ret)
+ return ret;
+ }
+
+ for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++) {
+ if (!devs_present[i])
+ continue;
+
+ ideapad_register_rfkill(device, i);
+ }
+ ideapad_sync_rfk_state();
+ return 0;
+}
+
+static int ideapad_acpi_remove(struct acpi_device *device, int type)
+{
+ int i;
+ device_remove_file(&device->dev, &dev_attr_camera_power);
+ for (i = 0; i < 5; i++)
+ ideapad_unregister_rfkill(i);
+ return 0;
+}
+
+static void ideapad_acpi_notify(struct acpi_device *device, u32 event)
+{
+ ideapad_sync_rfk_state();
+}
+
+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);
projects / platform / kernel / linux-rpi.git / commitdiff