diff options
Diffstat (limited to 'drivers/media/video/m52790.c')
| -rw-r--r-- | drivers/media/video/m52790.c | 176 |
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; } |