diff options
Diffstat (limited to 'drivers/media/video/wm8775.c')
| -rw-r--r-- | drivers/media/video/wm8775.c | 221 |
1 files changed, 133 insertions, 88 deletions
diff --git a/drivers/media/video/wm8775.c b/drivers/media/video/wm8775.c index 48df661d4fc3..d0220b0ec0bc 100644 --- a/drivers/media/video/wm8775.c +++ b/drivers/media/video/wm8775.c @@ -32,7 +32,7 @@ #include <linux/i2c.h> #include <linux/i2c-id.h> #include <linux/videodev2.h> -#include <media/v4l2-common.h> +#include <media/v4l2-device.h> #include <media/v4l2-chip-ident.h> #include <media/v4l2-i2c-drv-legacy.h> @@ -54,16 +54,23 @@ enum { }; struct wm8775_state { + struct v4l2_subdev sd; u8 input; /* Last selected input (0-0xf) */ u8 muted; }; -static int wm8775_write(struct i2c_client *client, int reg, u16 val) +static inline struct wm8775_state *to_state(struct v4l2_subdev *sd) { + return container_of(sd, struct wm8775_state, sd); +} + +static int wm8775_write(struct v4l2_subdev *sd, int reg, u16 val) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); int i; if (reg < 0 || reg >= TOT_REGS) { - v4l_err(client, "Invalid register R%d\n", reg); + v4l2_err(sd, "Invalid register R%d\n", reg); return -1; } @@ -71,84 +78,117 @@ static int wm8775_write(struct i2c_client *client, int reg, u16 val) if (i2c_smbus_write_byte_data(client, (reg << 1) | (val >> 8), val & 0xff) == 0) return 0; - v4l_err(client, "I2C: cannot write %03x to register R%d\n", val, reg); + v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg); return -1; } -static int wm8775_command(struct i2c_client *client, unsigned cmd, void *arg) +static int wm8775_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route) { - struct wm8775_state *state = i2c_get_clientdata(client); - struct v4l2_routing *route = arg; - struct v4l2_control *ctrl = arg; - - switch (cmd) { - case VIDIOC_INT_G_AUDIO_ROUTING: - route->input = state->input; - route->output = 0; - break; - - case VIDIOC_INT_S_AUDIO_ROUTING: - /* There are 4 inputs and one output. Zero or more inputs - are multiplexed together to the output. Hence there are - 16 combinations. - If only one input is active (the normal case) then the - input values 1, 2, 4 or 8 should be used. */ - if (route->input > 15) { - v4l_err(client, "Invalid input %d.\n", route->input); - return -EINVAL; - } - state->input = route->input; - if (state->muted) - break; - wm8775_write(client, R21, 0x0c0); - wm8775_write(client, R14, 0x1d4); - wm8775_write(client, R15, 0x1d4); - wm8775_write(client, R21, 0x100 + state->input); - break; - - case VIDIOC_G_CTRL: - if (ctrl->id != V4L2_CID_AUDIO_MUTE) - return -EINVAL; - ctrl->value = state->muted; - break; - - case VIDIOC_S_CTRL: - if (ctrl->id != V4L2_CID_AUDIO_MUTE) - return -EINVAL; - state->muted = ctrl->value; - wm8775_write(client, R21, 0x0c0); - wm8775_write(client, R14, 0x1d4); - wm8775_write(client, R15, 0x1d4); - if (!state->muted) - wm8775_write(client, R21, 0x100 + state->input); - break; - - case VIDIOC_G_CHIP_IDENT: - return v4l2_chip_ident_i2c_client(client, - arg, V4L2_IDENT_WM8775, 0); - - case VIDIOC_LOG_STATUS: - v4l_info(client, "Input: %d%s\n", state->input, - state->muted ? " (muted)" : ""); - break; - - case VIDIOC_S_FREQUENCY: - /* If I remove this, then it can happen that I have no - sound the first time I tune from static to a valid channel. - It's difficult to reproduce and is almost certainly related - to the zero cross detect circuit. */ - wm8775_write(client, R21, 0x0c0); - wm8775_write(client, R14, 0x1d4); - wm8775_write(client, R15, 0x1d4); - wm8775_write(client, R21, 0x100 + state->input); - break; - - default: + struct wm8775_state *state = to_state(sd); + + /* There are 4 inputs and one output. Zero or more inputs + are multiplexed together to the output. Hence there are + 16 combinations. + If only one input is active (the normal case) then the + input values 1, 2, 4 or 8 should be used. */ + if (route->input > 15) { + v4l2_err(sd, "Invalid input %d.\n", route->input); return -EINVAL; } + state->input = route->input; + if (state->muted) + return 0; + wm8775_write(sd, R21, 0x0c0); + wm8775_write(sd, R14, 0x1d4); + wm8775_write(sd, R15, 0x1d4); + wm8775_write(sd, R21, 0x100 + state->input); + return 0; +} + +static int wm8775_g_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; + 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; +} + +static int wm8775_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_WM8775, 0); +} + +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)" : ""); return 0; } +static int wm8775_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *freq) +{ + struct wm8775_state *state = to_state(sd); + + /* If I remove this, then it can happen that I have no + sound the first time I tune from static to a valid channel. + It's difficult to reproduce and is almost certainly related + to the zero cross detect circuit. */ + wm8775_write(sd, R21, 0x0c0); + wm8775_write(sd, R14, 0x1d4); + wm8775_write(sd, R15, 0x1d4); + wm8775_write(sd, R21, 0x100 + state->input); + return 0; +} + +static int wm8775_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 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, +}; + +static const struct v4l2_subdev_tuner_ops wm8775_tuner_ops = { + .s_frequency = wm8775_s_frequency, +}; + +static const struct v4l2_subdev_audio_ops wm8775_audio_ops = { + .s_routing = wm8775_s_routing, +}; + +static const struct v4l2_subdev_ops wm8775_ops = { + .core = &wm8775_core_ops, + .tuner = &wm8775_tuner_ops, + .audio = &wm8775_audio_ops, +}; + /* ----------------------------------------------------------------------- */ /* i2c implementation */ @@ -162,56 +202,61 @@ static int wm8775_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct wm8775_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)) return -EIO; - v4l_info(client, "chip found @ 0x%x (%s)\n", + v4l_info(client, "chip found @ 0x%02x (%s)\n", client->addr << 1, client->adapter->name); state = kmalloc(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; - i2c_set_clientdata(client, state); /* Initialize wm8775 */ /* RESET */ - wm8775_write(client, R23, 0x000); + wm8775_write(sd, R23, 0x000); /* Disable zero cross detect timeout */ - wm8775_write(client, R7, 0x000); + wm8775_write(sd, R7, 0x000); /* Left justified, 24-bit mode */ - wm8775_write(client, R11, 0x021); + wm8775_write(sd, R11, 0x021); /* Master mode, clock ratio 256fs */ - wm8775_write(client, R12, 0x102); + wm8775_write(sd, R12, 0x102); /* Powered up */ - wm8775_write(client, R13, 0x000); + wm8775_write(sd, R13, 0x000); /* ADC gain +2.5dB, enable zero cross */ - wm8775_write(client, R14, 0x1d4); + wm8775_write(sd, R14, 0x1d4); /* ADC gain +2.5dB, enable zero cross */ - wm8775_write(client, R15, 0x1d4); + wm8775_write(sd, R15, 0x1d4); /* ALC Stereo, ALC target level -1dB FS max gain +8dB */ - wm8775_write(client, R16, 0x1bf); + wm8775_write(sd, R16, 0x1bf); /* Enable gain control, use zero cross detection, ALC hold time 42.6 ms */ - wm8775_write(client, R17, 0x185); + wm8775_write(sd, R17, 0x185); /* ALC gain ramp up delay 34 s, ALC gain ramp down delay 33 ms */ - wm8775_write(client, R18, 0x0a2); + wm8775_write(sd, R18, 0x0a2); /* Enable noise gate, threshold -72dBfs */ - wm8775_write(client, R19, 0x005); + wm8775_write(sd, R19, 0x005); /* Transient window 4ms, lower PGA gain limit -1dB */ - wm8775_write(client, R20, 0x07a); + wm8775_write(sd, R20, 0x07a); /* LRBOTH = 1, use input 2. */ - wm8775_write(client, R21, 0x102); + wm8775_write(sd, R21, 0x102); return 0; } static int wm8775_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; } |