eeepc-wmi: add rfkill support for wlan, bluetooth and 3g

wimax support is missing because I don't have any DSDT
with WMI and wimax support.

Most of the code comes from eeepc-laptop.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

2 files changed, 139 insertions, 0 deletions

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index adcdbbd7d3fd..4c7f8b926103 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -425,6 +425,7 @@ config EEEPC_WMI
         depends on INPUT
         depends on EXPERIMENTAL
         depends on BACKLIGHT_CLASS_DEVICE
+        depends on RFKILL || RFKILL = n
         select INPUT_SPARSEKMAP
         select LEDS_CLASS
         select NEW_LEDS
diff --git a/drivers/platform/x86/eeepc-wmi.c b/drivers/platform/x86/eeepc-wmi.c
index f12a25da4055..fb548f4b03e0 100644
--- a/drivers/platform/x86/eeepc-wmi.c
+++ b/drivers/platform/x86/eeepc-wmi.c
@@ -35,6 +35,7 @@
 #include <linux/fb.h>
 #include <linux/backlight.h>
 #include <linux/leds.h>
+#include <linux/rfkill.h>
 #include <linux/platform_device.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
@@ -62,6 +63,9 @@ MODULE_ALIAS("wmi:"EEEPC_WMI_MGMT_GUID);
 
 #define EEEPC_WMI_DEVID_BACKLIGHT       0x00050012
 #define EEEPC_WMI_DEVID_TPDLED          0x00100011
+#define EEEPC_WMI_DEVID_WLAN            0x00010011
+#define EEEPC_WMI_DEVID_BLUETOOTH       0x00010013
+#define EEEPC_WMI_DEVID_WWAN3G          0x00010019
 
 static const struct key_entry eeepc_wmi_keymap[] = {
         /* Sleep already handled via generic ACPI code */
@@ -94,6 +98,10 @@ struct eeepc_wmi {
         int tpd_led_wk;
         struct workqueue_struct *led_workqueue;
         struct work_struct tpd_led_work;
+
+        struct rfkill *wlan_rfkill;
+        struct rfkill *bluetooth_rfkill;
+        struct rfkill *wwan3g_rfkill;
 };
 
 /* Only used in eeepc_wmi_init() and eeepc_wmi_exit() */
@@ -280,6 +288,129 @@ static void eeepc_wmi_led_exit(struct eeepc_wmi *eeepc)
 }
 
 /*
+ * Rfkill devices
+ */
+static int eeepc_rfkill_set(void *data, bool blocked)
+{
+        int dev_id = (unsigned long)data;
+        u32 ctrl_param = !blocked;
+
+        return eeepc_wmi_set_devstate(dev_id, ctrl_param);
+}
+
+static void eeepc_rfkill_query(struct rfkill *rfkill, void *data)
+{
+        int dev_id = (unsigned long)data;
+        u32 ctrl_param;
+        acpi_status status;
+
+        status = eeepc_wmi_get_devstate(dev_id, &ctrl_param);
+
+        if (ACPI_FAILURE(status))
+                return ;
+
+        rfkill_set_sw_state(rfkill, !(ctrl_param & 0x1));
+}
+
+static const struct rfkill_ops eeepc_rfkill_ops = {
+        .set_block = eeepc_rfkill_set,
+        .query = eeepc_rfkill_query,
+};
+
+static int eeepc_new_rfkill(struct eeepc_wmi *eeepc,
+                            struct rfkill **rfkill,
+                            const char *name,
+                            enum rfkill_type type, int dev_id)
+{
+        int result;
+        u32 ctrl_param;
+        acpi_status status;
+
+        status = eeepc_wmi_get_devstate(dev_id, &ctrl_param);
+
+        if (ACPI_FAILURE(status))
+                return -1;
+
+        /* If the device is present, DSTS will always set some bits
+         * 0x00070000 - 1110000000000000000 - device supported
+         * 0x00060000 - 1100000000000000000 - not supported
+         * 0x00020000 - 0100000000000000000 - device supported
+         * 0x00010000 - 0010000000000000000 - not supported / special mode ?
+         */
+        if (!ctrl_param || ctrl_param == 0x00060000)
+                return -ENODEV;
+
+        *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
+                               &eeepc_rfkill_ops, (void *)(long)dev_id);
+
+        if (!*rfkill)
+                return -EINVAL;
+
+        rfkill_init_sw_state(*rfkill, !(ctrl_param & 0x1));
+        result = rfkill_register(*rfkill);
+        if (result) {
+                rfkill_destroy(*rfkill);
+                *rfkill = NULL;
+                return result;
+        }
+        return 0;
+}
+
+static void eeepc_wmi_rfkill_exit(struct eeepc_wmi *eeepc)
+{
+        if (eeepc->wlan_rfkill) {
+                rfkill_unregister(eeepc->wlan_rfkill);
+                rfkill_destroy(eeepc->wlan_rfkill);
+                eeepc->wlan_rfkill = NULL;
+        }
+        if (eeepc->bluetooth_rfkill) {
+                rfkill_unregister(eeepc->bluetooth_rfkill);
+                rfkill_destroy(eeepc->bluetooth_rfkill);
+                eeepc->bluetooth_rfkill = NULL;
+        }
+        if (eeepc->wwan3g_rfkill) {
+                rfkill_unregister(eeepc->wwan3g_rfkill);
+                rfkill_destroy(eeepc->wwan3g_rfkill);
+                eeepc->wwan3g_rfkill = NULL;
+        }
+}
+
+static int eeepc_wmi_rfkill_init(struct eeepc_wmi *eeepc)
+{
+        int result = 0;
+
+        result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
+                                  "eeepc-wlan", RFKILL_TYPE_WLAN,
+                                  EEEPC_WMI_DEVID_WLAN);
+
+        if (result && result != -ENODEV)
+                goto exit;
+
+        result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
+                                  "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
+                                  EEEPC_WMI_DEVID_BLUETOOTH);
+
+        if (result && result != -ENODEV)
+                goto exit;
+
+        result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
+                                  "eeepc-wwan3g", RFKILL_TYPE_WWAN,
+                                  EEEPC_WMI_DEVID_WWAN3G);
+
+        if (result && result != -ENODEV)
+                goto exit;
+
+exit:
+        if (result && result != -ENODEV)
+                eeepc_wmi_rfkill_exit(eeepc);
+
+        if (result == -ENODEV)
+                result = 0;
+
+        return result;
+}
+
+/*
  * Backlight
  */
 static int read_brightness(struct backlight_device *bd)
@@ -512,6 +643,10 @@ static struct platform_device * __init eeepc_wmi_add(void)
         if (err)
                 goto fail_leds;
 
+        err = eeepc_wmi_rfkill_init(eeepc);
+        if (err)
+                goto fail_rfkill;
+
         if (!acpi_video_backlight_support()) {
                 err = eeepc_wmi_backlight_init(eeepc);
                 if (err)
@@ -533,6 +668,8 @@ static struct platform_device * __init eeepc_wmi_add(void)
 fail_wmi_handler:
         eeepc_wmi_backlight_exit(eeepc);
 fail_backlight:
+        eeepc_wmi_rfkill_exit(eeepc);
+fail_rfkill:
         eeepc_wmi_led_exit(eeepc);
 fail_leds:
         eeepc_wmi_input_exit(eeepc);
@@ -552,6 +689,7 @@ static int eeepc_wmi_remove(struct platform_device *device)
         eeepc_wmi_backlight_exit(eeepc);
         eeepc_wmi_input_exit(eeepc);
         eeepc_wmi_led_exit(eeepc);
+        eeepc_wmi_rfkill_exit(eeepc);
         eeepc_wmi_platform_exit(eeepc);
 
         kfree(eeepc);