V4L/DVB (9824): m52790: convert to v4l2_subdev.

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

1 files changed, 111 insertions, 65 deletions

diff --git a/drivers/media/video/m52790.c b/drivers/media/video/m52790.c
index 89a781c6929d..07be14a9fe7b 100644
--- a/drivers/media/video/m52790.c
+++ b/drivers/media/video/m52790.c
@@ -28,7 +28,7 @@
 #include <linux/i2c-id.h>
 #include <linux/videodev2.h>
 #include <media/m52790.h>
-#include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
 #include <media/v4l2-chip-ident.h>
 #include <media/v4l2-i2c-drv.h>
 
@@ -38,89 +38,130 @@ MODULE_LICENSE("GPL");
 
 
 struct m52790_state {
+        struct v4l2_subdev sd;
         u16 input;
         u16 output;
 };
 
+static inline struct m52790_state *to_state(struct v4l2_subdev *sd)
+{
+        return container_of(sd, struct m52790_state, sd);
+}
+
 /* ----------------------------------------------------------------------- */
 
-static int m52790_write(struct i2c_client *client)
+static int m52790_write(struct v4l2_subdev *sd)
 {
-        struct m52790_state *state = i2c_get_clientdata(client);
+        struct m52790_state *state = to_state(sd);
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
         u8 sw1 = (state->input | state->output) & 0xff;
         u8 sw2 = (state->input | state->output) >> 8;
 
         return i2c_smbus_write_byte_data(client, sw1, sw2);
 }
 
-static int m52790_command(struct i2c_client *client, unsigned int cmd,
-                            void *arg)
+/* Note: audio and video are linked and cannot be switched separately.
+   So audio and video routing commands are identical for this chip.
+   In theory the video amplifier and audio modes could be handled
+   separately for the output, but that seems to be overkill right now.
+   The same holds for implementing an audio mute control, this is now
+   part of the audio output routing. The normal case is that another
+   chip takes care of the actual muting so making it part of the
+   output routing seems to be the right thing to do for now. */
+static int m52790_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
 {
-        struct m52790_state *state = i2c_get_clientdata(client);
-        struct v4l2_routing *route = arg;
-
-        /* Note: audio and video are linked and cannot be switched separately.
-           So audio and video routing commands are identical for this chip.
-           In theory the video amplifier and audio modes could be handled
-           separately for the output, but that seems to be overkill right now.
-           The same holds for implementing an audio mute control, this is now
-           part of the audio output routing. The normal case is that another
-           chip takes care of the actual muting so making it part of the
-           output routing seems to be the right thing to do for now. */
-        switch (cmd) {
-        case VIDIOC_INT_G_AUDIO_ROUTING:
-        case VIDIOC_INT_G_VIDEO_ROUTING:
-                route->input = state->input;
-                route->output = state->output;
-                break;
-
-        case VIDIOC_INT_S_AUDIO_ROUTING:
-        case VIDIOC_INT_S_VIDEO_ROUTING:
-                state->input = route->input;
-                state->output = route->output;
-                m52790_write(client);
-                break;
+        struct m52790_state *state = to_state(sd);
+
+        state->input = route->input;
+        state->output = route->output;
+        m52790_write(sd);
+        return 0;
+}
 
 #ifdef CONFIG_VIDEO_ADV_DEBUG
-        case VIDIOC_DBG_G_REGISTER:
-        case VIDIOC_DBG_S_REGISTER:
-        {
-                struct v4l2_register *reg = arg;
-
-                if (!v4l2_chip_match_i2c_client(client,
-                                        reg->match_type, reg->match_chip))
-                        return -EINVAL;
-                if (!capable(CAP_SYS_ADMIN))
-                        return -EPERM;
-                if (reg->reg != 0)
-                        return -EINVAL;
-                if (cmd == VIDIOC_DBG_G_REGISTER)
-                        reg->val = state->input | state->output;
-                else {
-                        state->input = reg->val & 0x0303;
-                        state->output = reg->val & ~0x0303;
-                        m52790_write(client);
-                }
-                break;
-        }
-#endif
+static int m52790_g_register(struct v4l2_subdev *sd, struct v4l2_register *reg)
+{
+        struct m52790_state *state = to_state(sd);
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
 
-        case VIDIOC_G_CHIP_IDENT:
-                return v4l2_chip_ident_i2c_client(client, arg,
-                                V4L2_IDENT_M52790, 0);
+        if (!v4l2_chip_match_i2c_client(client,
+                                reg->match_type, reg->match_chip))
+                return -EINVAL;
+        if (!capable(CAP_SYS_ADMIN))
+                return -EPERM;
+        if (reg->reg != 0)
+                return -EINVAL;
+        reg->val = state->input | state->output;
+        return 0;
+}
 
-        case VIDIOC_LOG_STATUS:
-                v4l_info(client, "Switch 1: %02x\n",
-                                (state->input | state->output) & 0xff);
-                v4l_info(client, "Switch 2: %02x\n",
-                                (state->input | state->output) >> 8);
-                break;
+static int m52790_s_register(struct v4l2_subdev *sd, struct v4l2_register *reg)
+{
+        struct m52790_state *state = to_state(sd);
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
 
-        default:
+        if (!v4l2_chip_match_i2c_client(client,
+                                reg->match_type, reg->match_chip))
                 return -EINVAL;
-        }
+        if (!capable(CAP_SYS_ADMIN))
+                return -EPERM;
+        if (reg->reg != 0)
+                return -EINVAL;
+        state->input = reg->val & 0x0303;
+        state->output = reg->val & ~0x0303;
+        m52790_write(sd);
         return 0;
 }
+#endif
+
+static int m52790_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_chip_ident *chip)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_M52790, 0);
+}
+
+static int m52790_log_status(struct v4l2_subdev *sd)
+{
+        struct m52790_state *state = to_state(sd);
+
+        v4l2_info(sd, "Switch 1: %02x\n",
+                        (state->input | state->output) & 0xff);
+        v4l2_info(sd, "Switch 2: %02x\n",
+                        (state->input | state->output) >> 8);
+        return 0;
+}
+
+static int m52790_command(struct i2c_client *client, unsigned cmd, void *arg)
+{
+        return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct v4l2_subdev_core_ops m52790_core_ops = {
+        .log_status = m52790_log_status,
+        .g_chip_ident = m52790_g_chip_ident,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+        .g_register = m52790_g_register,
+        .s_register = m52790_s_register,
+#endif
+};
+
+static const struct v4l2_subdev_audio_ops m52790_audio_ops = {
+        .s_routing = m52790_s_routing,
+};
+
+static const struct v4l2_subdev_video_ops m52790_video_ops = {
+        .s_routing = m52790_s_routing,
+};
+
+static const struct v4l2_subdev_ops m52790_ops = {
+        .core = &m52790_core_ops,
+        .audio = &m52790_audio_ops,
+        .video = &m52790_video_ops,
+};
 
 /* ----------------------------------------------------------------------- */
 
@@ -130,6 +171,7 @@ static int m52790_probe(struct i2c_client *client,
                         const struct i2c_device_id *id)
 {
         struct m52790_state *state;
+        struct v4l2_subdev *sd;
 
         /* Check if the adapter supports the needed features */
         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
@@ -142,16 +184,20 @@ static int m52790_probe(struct i2c_client *client,
         if (state == NULL)
                 return -ENOMEM;
 
+        sd = &state->sd;
+        v4l2_i2c_subdev_init(sd, client, &m52790_ops);
         state->input = M52790_IN_TUNER;
         state->output = M52790_OUT_STEREO;
-        i2c_set_clientdata(client, state);
-        m52790_write(client);
+        m52790_write(sd);
         return 0;
 }
 
 static int m52790_remove(struct i2c_client *client)
 {
-        kfree(i2c_get_clientdata(client));
+        struct v4l2_subdev *sd = i2c_get_clientdata(client);
+
+        v4l2_device_unregister_subdev(sd);
+        kfree(to_state(sd));
         return 0;
 }