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Diffstat (limited to 'drivers/media/video/m52790.c')
-rw-r--r--drivers/media/video/m52790.c176
1 files changed, 111 insertions, 65 deletions
diff --git a/drivers/media/video/m52790.c b/drivers/media/video/m52790.c
index 89a781c6929..07be14a9fe7 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;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-23 04:31:54 +0000