Acer-WMI: fingers off backlight if video.ko is serving this functionality
[sfrench/cifs-2.6.git] / drivers / misc / acer-wmi.c
index d8b0d326e4522232fbcc1455dce67fb3e207c059..94c9f911824ef5b3279205a41a87dd169935f1db 100644 (file)
@@ -33,6 +33,8 @@
 #include <linux/platform_device.h>
 #include <linux/acpi.h>
 #include <linux/i8042.h>
+#include <linux/rfkill.h>
+#include <linux/workqueue.h>
 #include <linux/debugfs.h>
 
 #include <acpi/acpi_drivers.h>
@@ -123,21 +125,15 @@ enum interface_flags {
 
 static int max_brightness = 0xF;
 
-static int wireless = -1;
-static int bluetooth = -1;
 static int mailled = -1;
 static int brightness = -1;
 static int threeg = -1;
 static int force_series;
 
 module_param(mailled, int, 0444);
-module_param(wireless, int, 0444);
-module_param(bluetooth, int, 0444);
 module_param(brightness, int, 0444);
 module_param(threeg, int, 0444);
 module_param(force_series, int, 0444);
-MODULE_PARM_DESC(wireless, "Set initial state of Wireless hardware");
-MODULE_PARM_DESC(bluetooth, "Set initial state of Bluetooth hardware");
 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
@@ -145,8 +141,6 @@ MODULE_PARM_DESC(force_series, "Force a different laptop series");
 
 struct acer_data {
        int mailled;
-       int wireless;
-       int bluetooth;
        int threeg;
        int brightness;
 };
@@ -157,6 +151,9 @@ struct acer_debug {
        u32 wmid_devices;
 };
 
+static struct rfkill *wireless_rfkill;
+static struct rfkill *bluetooth_rfkill;
+
 /* Each low-level interface must define at least some of the following */
 struct wmi_interface {
        /* The WMI device type */
@@ -476,7 +473,7 @@ struct wmi_interface *iface)
                }
                break;
        default:
-               return AE_BAD_ADDRESS;
+               return AE_ERROR;
        }
        return AE_OK;
 }
@@ -514,7 +511,7 @@ static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
                        break;
                }
        default:
-               return AE_BAD_ADDRESS;
+               return AE_ERROR;
        }
 
        /* Actually do the set */
@@ -689,7 +686,7 @@ struct wmi_interface *iface)
                        return 0;
                }
        default:
-               return AE_BAD_ADDRESS;
+               return AE_ERROR;
        }
        status = WMI_execute_u32(method_id, 0, &result);
 
@@ -735,7 +732,7 @@ static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
                }
                break;
        default:
-               return AE_BAD_ADDRESS;
+               return AE_ERROR;
        }
        return WMI_execute_u32(method_id, (u32)value, NULL);
 }
@@ -785,7 +782,7 @@ static struct wmi_interface wmid_interface = {
 
 static acpi_status get_u32(u32 *value, u32 cap)
 {
-       acpi_status status = AE_BAD_ADDRESS;
+       acpi_status status = AE_ERROR;
 
        switch (interface->type) {
        case ACER_AMW0:
@@ -846,8 +843,6 @@ static void __init acer_commandline_init(void)
         * capability isn't available on the given interface
         */
        set_u32(mailled, ACER_CAP_MAILLED);
-       set_u32(wireless, ACER_CAP_WIRELESS);
-       set_u32(bluetooth, ACER_CAP_BLUETOOTH);
        set_u32(threeg, ACER_CAP_THREEG);
        set_u32(brightness, ACER_CAP_BRIGHTNESS);
 }
@@ -933,40 +928,135 @@ static void acer_backlight_exit(void)
 }
 
 /*
- * Read/ write bool sysfs macro
+ * Rfkill devices
  */
-#define show_set_bool(value, cap) \
-static ssize_t \
-show_bool_##value(struct device *dev, struct device_attribute *attr, \
-       char *buf) \
-{ \
-       u32 result; \
-       acpi_status status = get_u32(&result, cap); \
-       if (ACPI_SUCCESS(status)) \
-               return sprintf(buf, "%u\n", result); \
-       return sprintf(buf, "Read error\n"); \
-} \
-\
-static ssize_t \
-set_bool_##value(struct device *dev, struct device_attribute *attr, \
-       const char *buf, size_t count) \
-{ \
-       u32 tmp = simple_strtoul(buf, NULL, 10); \
-       acpi_status status = set_u32(tmp, cap); \
-               if (ACPI_FAILURE(status)) \
-                       return -EINVAL; \
-       return count; \
-} \
-static DEVICE_ATTR(value, S_IWUGO | S_IRUGO | S_IWUSR, \
-       show_bool_##value, set_bool_##value);
-
-show_set_bool(wireless, ACER_CAP_WIRELESS);
-show_set_bool(bluetooth, ACER_CAP_BLUETOOTH);
-show_set_bool(threeg, ACER_CAP_THREEG);
+static void acer_rfkill_update(struct work_struct *ignored);
+static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
+static void acer_rfkill_update(struct work_struct *ignored)
+{
+       u32 state;
+       acpi_status status;
+
+       status = get_u32(&state, ACER_CAP_WIRELESS);
+       if (ACPI_SUCCESS(status))
+               rfkill_force_state(wireless_rfkill, state ?
+                       RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED);
+
+       if (has_cap(ACER_CAP_BLUETOOTH)) {
+               status = get_u32(&state, ACER_CAP_BLUETOOTH);
+               if (ACPI_SUCCESS(status))
+                       rfkill_force_state(bluetooth_rfkill, state ?
+                               RFKILL_STATE_UNBLOCKED :
+                               RFKILL_STATE_SOFT_BLOCKED);
+       }
+
+       schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
+}
+
+static int acer_rfkill_set(void *data, enum rfkill_state state)
+{
+       acpi_status status;
+       u32 *cap = data;
+       status = set_u32((u32) (state == RFKILL_STATE_UNBLOCKED), *cap);
+       if (ACPI_FAILURE(status))
+               return -ENODEV;
+       return 0;
+}
+
+static struct rfkill * acer_rfkill_register(struct device *dev,
+enum rfkill_type type, char *name, u32 cap)
+{
+       int err;
+       u32 state;
+       u32 *data;
+       struct rfkill *rfkill_dev;
+
+       rfkill_dev = rfkill_allocate(dev, type);
+       if (!rfkill_dev)
+               return ERR_PTR(-ENOMEM);
+       rfkill_dev->name = name;
+       get_u32(&state, cap);
+       rfkill_dev->state = state ? RFKILL_STATE_UNBLOCKED :
+               RFKILL_STATE_SOFT_BLOCKED;
+       data = kzalloc(sizeof(u32), GFP_KERNEL);
+       if (!data) {
+               rfkill_free(rfkill_dev);
+               return ERR_PTR(-ENOMEM);
+       }
+       *data = cap;
+       rfkill_dev->data = data;
+       rfkill_dev->toggle_radio = acer_rfkill_set;
+       rfkill_dev->user_claim_unsupported = 1;
+
+       err = rfkill_register(rfkill_dev);
+       if (err) {
+               kfree(rfkill_dev->data);
+               rfkill_free(rfkill_dev);
+               return ERR_PTR(err);
+       }
+       return rfkill_dev;
+}
+
+static int acer_rfkill_init(struct device *dev)
+{
+       wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
+               "acer-wireless", ACER_CAP_WIRELESS);
+       if (IS_ERR(wireless_rfkill))
+               return PTR_ERR(wireless_rfkill);
+
+       if (has_cap(ACER_CAP_BLUETOOTH)) {
+               bluetooth_rfkill = acer_rfkill_register(dev,
+                       RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
+                       ACER_CAP_BLUETOOTH);
+               if (IS_ERR(bluetooth_rfkill)) {
+                       kfree(wireless_rfkill->data);
+                       rfkill_unregister(wireless_rfkill);
+                       return PTR_ERR(bluetooth_rfkill);
+               }
+       }
+
+       schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
+
+       return 0;
+}
+
+static void acer_rfkill_exit(void)
+{
+       cancel_delayed_work_sync(&acer_rfkill_work);
+       kfree(wireless_rfkill->data);
+       rfkill_unregister(wireless_rfkill);
+       if (has_cap(ACER_CAP_BLUETOOTH)) {
+               kfree(wireless_rfkill->data);
+               rfkill_unregister(bluetooth_rfkill);
+       }
+       return;
+}
 
 /*
- * Read interface sysfs macro
+ * sysfs interface
  */
+static ssize_t show_bool_threeg(struct device *dev,
+       struct device_attribute *attr, char *buf)
+{
+       u32 result; \
+       acpi_status status = get_u32(&result, ACER_CAP_THREEG);
+       if (ACPI_SUCCESS(status))
+               return sprintf(buf, "%u\n", result);
+       return sprintf(buf, "Read error\n");
+}
+
+static ssize_t set_bool_threeg(struct device *dev,
+       struct device_attribute *attr, const char *buf, size_t count)
+{
+       u32 tmp = simple_strtoul(buf, NULL, 10);
+       acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
+               if (ACPI_FAILURE(status))
+                       return -EINVAL;
+       return count;
+}
+static DEVICE_ATTR(threeg, S_IWUGO | S_IRUGO | S_IWUSR, show_bool_threeg,
+       set_bool_threeg);
+
 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
        char *buf)
 {
@@ -1026,7 +1116,9 @@ static int __devinit acer_platform_probe(struct platform_device *device)
                        goto error_brightness;
        }
 
-       return 0;
+       err = acer_rfkill_init(&device->dev);
+
+       return err;
 
 error_brightness:
        acer_led_exit();
@@ -1040,6 +1132,8 @@ static int acer_platform_remove(struct platform_device *device)
                acer_led_exit();
        if (has_cap(ACER_CAP_BRIGHTNESS))
                acer_backlight_exit();
+
+       acer_rfkill_exit();
        return 0;
 }
 
@@ -1052,16 +1146,6 @@ pm_message_t state)
        if (!data)
                return -ENOMEM;
 
-       if (has_cap(ACER_CAP_WIRELESS)) {
-               get_u32(&value, ACER_CAP_WIRELESS);
-               data->wireless = value;
-       }
-
-       if (has_cap(ACER_CAP_BLUETOOTH)) {
-               get_u32(&value, ACER_CAP_BLUETOOTH);
-               data->bluetooth = value;
-       }
-
        if (has_cap(ACER_CAP_MAILLED)) {
                get_u32(&value, ACER_CAP_MAILLED);
                data->mailled = value;
@@ -1082,15 +1166,6 @@ static int acer_platform_resume(struct platform_device *device)
        if (!data)
                return -ENOMEM;
 
-       if (has_cap(ACER_CAP_WIRELESS))
-               set_u32(data->wireless, ACER_CAP_WIRELESS);
-
-       if (has_cap(ACER_CAP_BLUETOOTH))
-               set_u32(data->bluetooth, ACER_CAP_BLUETOOTH);
-
-       if (has_cap(ACER_CAP_THREEG))
-               set_u32(data->threeg, ACER_CAP_THREEG);
-
        if (has_cap(ACER_CAP_MAILLED))
                set_u32(data->mailled, ACER_CAP_MAILLED);
 
@@ -1115,12 +1190,6 @@ static struct platform_device *acer_platform_device;
 
 static int remove_sysfs(struct platform_device *device)
 {
-       if (has_cap(ACER_CAP_WIRELESS))
-               device_remove_file(&device->dev, &dev_attr_wireless);
-
-       if (has_cap(ACER_CAP_BLUETOOTH))
-               device_remove_file(&device->dev, &dev_attr_bluetooth);
-
        if (has_cap(ACER_CAP_THREEG))
                device_remove_file(&device->dev, &dev_attr_threeg);
 
@@ -1133,20 +1202,6 @@ static int create_sysfs(void)
 {
        int retval = -ENOMEM;
 
-       if (has_cap(ACER_CAP_WIRELESS)) {
-               retval = device_create_file(&acer_platform_device->dev,
-                       &dev_attr_wireless);
-               if (retval)
-                       goto error_sysfs;
-       }
-
-       if (has_cap(ACER_CAP_BLUETOOTH)) {
-               retval = device_create_file(&acer_platform_device->dev,
-                       &dev_attr_bluetooth);
-               if (retval)
-                       goto error_sysfs;
-       }
-
        if (has_cap(ACER_CAP_THREEG)) {
                retval = device_create_file(&acer_platform_device->dev,
                        &dev_attr_threeg);
@@ -1242,6 +1297,12 @@ static int __init acer_wmi_init(void)
 
        set_quirks();
 
+       if (!acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
+               interface->capability &= ~ACER_CAP_BRIGHTNESS;
+               printk(ACER_INFO "Brightness must be controlled by "
+                      "generic video driver\n");
+       }
+
        if (platform_driver_register(&acer_platform_driver)) {
                printk(ACER_ERR "Unable to register platform driver.\n");
                goto error_platform_register;