V4L/DVB: wm8775: convert to the new control framework

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 50 insertions, 29 deletions

diff --git a/drivers/media/video/wm8775.c b/drivers/media/video/wm8775.c
index 5c2ba599c0c..23bad3fd6dc 100644
--- a/drivers/media/video/wm8775.c
+++ b/drivers/media/video/wm8775.c
@@ -35,6 +35,7 @@
 #include <linux/videodev2.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-chip-ident.h>
+#include <media/v4l2-ctrls.h>
 #include <media/v4l2-i2c-drv.h>
 
 MODULE_DESCRIPTION("wm8775 driver");
@@ -53,8 +54,9 @@ enum {
 
 struct wm8775_state {
         struct v4l2_subdev sd;
+        struct v4l2_ctrl_handler hdl;
+        struct v4l2_ctrl *mute;
         u8 input;               /* Last selected input (0-0xf) */
-        u8 muted;
 };
 
 static inline struct wm8775_state *to_state(struct v4l2_subdev *sd)
@@ -62,6 +64,11 @@ static inline struct wm8775_state *to_state(struct v4l2_subdev *sd)
         return container_of(sd, struct wm8775_state, sd);
 }
 
+static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
+{
+        return &container_of(ctrl->handler, struct wm8775_state, hdl)->sd;
+}
+
 static int wm8775_write(struct v4l2_subdev *sd, int reg, u16 val)
 {
         struct i2c_client *client = v4l2_get_subdevdata(sd);
@@ -95,7 +102,7 @@ static int wm8775_s_routing(struct v4l2_subdev *sd,
                 return -EINVAL;
         }
         state->input = input;
-        if (state->muted)
+        if (!v4l2_ctrl_g_ctrl(state->mute))
                 return 0;
         wm8775_write(sd, R21, 0x0c0);
         wm8775_write(sd, R14, 0x1d4);
@@ -104,29 +111,21 @@ static int wm8775_s_routing(struct v4l2_subdev *sd,
         return 0;
 }
 
-static int wm8775_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+static int wm8775_s_ctrl(struct v4l2_ctrl *ctrl)
 {
+        struct v4l2_subdev *sd = to_sd(ctrl);
         struct wm8775_state *state = to_state(sd);
 
-        if (ctrl->id != V4L2_CID_AUDIO_MUTE)
-                return -EINVAL;
-        ctrl->value = state->muted;
-        return 0;
-}
-
-static int wm8775_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
-{
-        struct wm8775_state *state = to_state(sd);
-
-        if (ctrl->id != V4L2_CID_AUDIO_MUTE)
-                return -EINVAL;
-        state->muted = ctrl->value;
-        wm8775_write(sd, R21, 0x0c0);
-        wm8775_write(sd, R14, 0x1d4);
-        wm8775_write(sd, R15, 0x1d4);
-        if (!state->muted)
-                wm8775_write(sd, R21, 0x100 + state->input);
-        return 0;
+        switch (ctrl->id) {
+        case V4L2_CID_AUDIO_MUTE:
+                wm8775_write(sd, R21, 0x0c0);
+                wm8775_write(sd, R14, 0x1d4);
+                wm8775_write(sd, R15, 0x1d4);
+                if (!ctrl->val)
+                        wm8775_write(sd, R21, 0x100 + state->input);
+                return 0;
+        }
+        return -EINVAL;
 }
 
 static int wm8775_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
@@ -140,8 +139,8 @@ static int wm8775_log_status(struct v4l2_subdev *sd)
 {
         struct wm8775_state *state = to_state(sd);
 
-        v4l2_info(sd, "Input: %d%s\n", state->input,
-                        state->muted ? " (muted)" : "");
+        v4l2_info(sd, "Input: %d\n", state->input);
+        v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
         return 0;
 }
 
@@ -162,11 +161,20 @@ static int wm8775_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *fre
 
 /* ----------------------------------------------------------------------- */
 
+static const struct v4l2_ctrl_ops wm8775_ctrl_ops = {
+        .s_ctrl = wm8775_s_ctrl,
+};
+
 static const struct v4l2_subdev_core_ops wm8775_core_ops = {
         .log_status = wm8775_log_status,
         .g_chip_ident = wm8775_g_chip_ident,
-        .g_ctrl = wm8775_g_ctrl,
-        .s_ctrl = wm8775_s_ctrl,
+        .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
+        .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
+        .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
+        .g_ctrl = v4l2_subdev_g_ctrl,
+        .s_ctrl = v4l2_subdev_s_ctrl,
+        .queryctrl = v4l2_subdev_queryctrl,
+        .querymenu = v4l2_subdev_querymenu,
 };
 
 static const struct v4l2_subdev_tuner_ops wm8775_tuner_ops = {
@@ -205,13 +213,24 @@ static int wm8775_probe(struct i2c_client *client,
         v4l_info(client, "chip found @ 0x%02x (%s)\n",
                         client->addr << 1, client->adapter->name);
 
-        state = kmalloc(sizeof(struct wm8775_state), GFP_KERNEL);
+        state = kzalloc(sizeof(struct wm8775_state), GFP_KERNEL);
         if (state == NULL)
                 return -ENOMEM;
         sd = &state->sd;
         v4l2_i2c_subdev_init(sd, client, &wm8775_ops);
         state->input = 2;
-        state->muted = 0;
+
+        v4l2_ctrl_handler_init(&state->hdl, 1);
+        state->mute = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops,
+                        V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
+        sd->ctrl_handler = &state->hdl;
+        if (state->hdl.error) {
+                int err = state->hdl.error;
+
+                v4l2_ctrl_handler_free(&state->hdl);
+                kfree(state);
+                return err;
+        }
 
         /* Initialize wm8775 */
 
@@ -248,9 +267,11 @@ static int wm8775_probe(struct i2c_client *client,
 static int wm8775_remove(struct i2c_client *client)
 {
         struct v4l2_subdev *sd = i2c_get_clientdata(client);
+        struct wm8775_state *state = to_state(sd);
 
         v4l2_device_unregister_subdev(sd);
-        kfree(to_state(sd));
+        v4l2_ctrl_handler_free(&state->hdl);
+        kfree(state);
         return 0;
 }