V4L/DVB (9834): wm8775: convert to v4l2_subdev.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil
Mauro Carvalho Chehab
parent
f1460e9771
commit
ca085fb900
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@ -32,7 +32,7 @@
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#include <linux/i2c.h>
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#include <linux/i2c-id.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-chip-ident.h>
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#include <media/v4l2-i2c-drv-legacy.h>
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@ -54,16 +54,23 @@ enum {
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};
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struct wm8775_state {
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struct v4l2_subdev sd;
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u8 input; /* Last selected input (0-0xf) */
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u8 muted;
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};
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static int wm8775_write(struct i2c_client *client, int reg, u16 val)
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static inline struct wm8775_state *to_state(struct v4l2_subdev *sd)
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{
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return container_of(sd, struct wm8775_state, sd);
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}
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static int wm8775_write(struct v4l2_subdev *sd, int reg, u16 val)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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int i;
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if (reg < 0 || reg >= TOT_REGS) {
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v4l_err(client, "Invalid register R%d\n", reg);
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v4l2_err(sd, "Invalid register R%d\n", reg);
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return -1;
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}
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@ -71,86 +78,119 @@ static int wm8775_write(struct i2c_client *client, int reg, u16 val)
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if (i2c_smbus_write_byte_data(client,
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(reg << 1) | (val >> 8), val & 0xff) == 0)
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return 0;
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v4l_err(client, "I2C: cannot write %03x to register R%d\n", val, reg);
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v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg);
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return -1;
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}
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static int wm8775_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
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{
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struct wm8775_state *state = to_state(sd);
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/* There are 4 inputs and one output. Zero or more inputs
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are multiplexed together to the output. Hence there are
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16 combinations.
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If only one input is active (the normal case) then the
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input values 1, 2, 4 or 8 should be used. */
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if (route->input > 15) {
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v4l2_err(sd, "Invalid input %d.\n", route->input);
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return -EINVAL;
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}
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state->input = route->input;
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if (state->muted)
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return 0;
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wm8775_write(sd, R21, 0x0c0);
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wm8775_write(sd, R14, 0x1d4);
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wm8775_write(sd, R15, 0x1d4);
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wm8775_write(sd, R21, 0x100 + state->input);
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return 0;
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}
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static int wm8775_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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{
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struct wm8775_state *state = to_state(sd);
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if (ctrl->id != V4L2_CID_AUDIO_MUTE)
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return -EINVAL;
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ctrl->value = state->muted;
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return 0;
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}
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static int wm8775_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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{
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struct wm8775_state *state = to_state(sd);
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if (ctrl->id != V4L2_CID_AUDIO_MUTE)
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return -EINVAL;
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state->muted = ctrl->value;
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wm8775_write(sd, R21, 0x0c0);
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wm8775_write(sd, R14, 0x1d4);
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wm8775_write(sd, R15, 0x1d4);
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if (!state->muted)
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wm8775_write(sd, R21, 0x100 + state->input);
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return 0;
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}
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static int wm8775_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_chip_ident *chip)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_WM8775, 0);
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}
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static int wm8775_log_status(struct v4l2_subdev *sd)
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{
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struct wm8775_state *state = to_state(sd);
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v4l2_info(sd, "Input: %d%s\n", state->input,
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state->muted ? " (muted)" : "");
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return 0;
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}
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static int wm8775_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *freq)
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{
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struct wm8775_state *state = to_state(sd);
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/* If I remove this, then it can happen that I have no
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sound the first time I tune from static to a valid channel.
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It's difficult to reproduce and is almost certainly related
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to the zero cross detect circuit. */
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wm8775_write(sd, R21, 0x0c0);
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wm8775_write(sd, R14, 0x1d4);
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wm8775_write(sd, R15, 0x1d4);
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wm8775_write(sd, R21, 0x100 + state->input);
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return 0;
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}
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static int wm8775_command(struct i2c_client *client, unsigned cmd, void *arg)
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{
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struct wm8775_state *state = i2c_get_clientdata(client);
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struct v4l2_routing *route = arg;
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struct v4l2_control *ctrl = arg;
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switch (cmd) {
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case VIDIOC_INT_G_AUDIO_ROUTING:
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route->input = state->input;
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route->output = 0;
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break;
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case VIDIOC_INT_S_AUDIO_ROUTING:
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/* There are 4 inputs and one output. Zero or more inputs
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are multiplexed together to the output. Hence there are
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16 combinations.
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If only one input is active (the normal case) then the
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input values 1, 2, 4 or 8 should be used. */
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if (route->input > 15) {
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v4l_err(client, "Invalid input %d.\n", route->input);
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return -EINVAL;
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}
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state->input = route->input;
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if (state->muted)
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break;
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wm8775_write(client, R21, 0x0c0);
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wm8775_write(client, R14, 0x1d4);
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wm8775_write(client, R15, 0x1d4);
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wm8775_write(client, R21, 0x100 + state->input);
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break;
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case VIDIOC_G_CTRL:
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if (ctrl->id != V4L2_CID_AUDIO_MUTE)
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return -EINVAL;
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ctrl->value = state->muted;
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break;
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case VIDIOC_S_CTRL:
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if (ctrl->id != V4L2_CID_AUDIO_MUTE)
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return -EINVAL;
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state->muted = ctrl->value;
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wm8775_write(client, R21, 0x0c0);
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wm8775_write(client, R14, 0x1d4);
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wm8775_write(client, R15, 0x1d4);
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if (!state->muted)
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wm8775_write(client, R21, 0x100 + state->input);
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break;
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case VIDIOC_G_CHIP_IDENT:
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return v4l2_chip_ident_i2c_client(client,
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arg, V4L2_IDENT_WM8775, 0);
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case VIDIOC_LOG_STATUS:
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v4l_info(client, "Input: %d%s\n", state->input,
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state->muted ? " (muted)" : "");
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break;
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case VIDIOC_S_FREQUENCY:
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/* If I remove this, then it can happen that I have no
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sound the first time I tune from static to a valid channel.
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It's difficult to reproduce and is almost certainly related
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to the zero cross detect circuit. */
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wm8775_write(client, R21, 0x0c0);
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wm8775_write(client, R14, 0x1d4);
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wm8775_write(client, R15, 0x1d4);
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wm8775_write(client, R21, 0x100 + state->input);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
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}
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/* ----------------------------------------------------------------------- */
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static const struct v4l2_subdev_core_ops wm8775_core_ops = {
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.log_status = wm8775_log_status,
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.g_chip_ident = wm8775_g_chip_ident,
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.g_ctrl = wm8775_g_ctrl,
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.s_ctrl = wm8775_s_ctrl,
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};
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static const struct v4l2_subdev_tuner_ops wm8775_tuner_ops = {
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.s_frequency = wm8775_s_frequency,
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};
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static const struct v4l2_subdev_audio_ops wm8775_audio_ops = {
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.s_routing = wm8775_s_routing,
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};
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static const struct v4l2_subdev_ops wm8775_ops = {
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.core = &wm8775_core_ops,
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.tuner = &wm8775_tuner_ops,
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.audio = &wm8775_audio_ops,
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};
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/* ----------------------------------------------------------------------- */
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/* i2c implementation */
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/*
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@ -162,56 +202,61 @@ static int wm8775_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct wm8775_state *state;
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struct v4l2_subdev *sd;
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/* Check if the adapter supports the needed features */
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return -EIO;
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v4l_info(client, "chip found @ 0x%x (%s)\n",
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v4l_info(client, "chip found @ 0x%02x (%s)\n",
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client->addr << 1, client->adapter->name);
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state = kmalloc(sizeof(struct wm8775_state), GFP_KERNEL);
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if (state == NULL)
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return -ENOMEM;
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sd = &state->sd;
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v4l2_i2c_subdev_init(sd, client, &wm8775_ops);
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state->input = 2;
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state->muted = 0;
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i2c_set_clientdata(client, state);
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/* Initialize wm8775 */
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/* RESET */
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wm8775_write(client, R23, 0x000);
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wm8775_write(sd, R23, 0x000);
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/* Disable zero cross detect timeout */
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wm8775_write(client, R7, 0x000);
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wm8775_write(sd, R7, 0x000);
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/* Left justified, 24-bit mode */
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wm8775_write(client, R11, 0x021);
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wm8775_write(sd, R11, 0x021);
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/* Master mode, clock ratio 256fs */
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wm8775_write(client, R12, 0x102);
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wm8775_write(sd, R12, 0x102);
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/* Powered up */
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wm8775_write(client, R13, 0x000);
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wm8775_write(sd, R13, 0x000);
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/* ADC gain +2.5dB, enable zero cross */
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wm8775_write(client, R14, 0x1d4);
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wm8775_write(sd, R14, 0x1d4);
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/* ADC gain +2.5dB, enable zero cross */
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wm8775_write(client, R15, 0x1d4);
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wm8775_write(sd, R15, 0x1d4);
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/* ALC Stereo, ALC target level -1dB FS max gain +8dB */
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wm8775_write(client, R16, 0x1bf);
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wm8775_write(sd, R16, 0x1bf);
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/* Enable gain control, use zero cross detection,
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ALC hold time 42.6 ms */
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wm8775_write(client, R17, 0x185);
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wm8775_write(sd, R17, 0x185);
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/* ALC gain ramp up delay 34 s, ALC gain ramp down delay 33 ms */
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wm8775_write(client, R18, 0x0a2);
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wm8775_write(sd, R18, 0x0a2);
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/* Enable noise gate, threshold -72dBfs */
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wm8775_write(client, R19, 0x005);
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wm8775_write(sd, R19, 0x005);
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/* Transient window 4ms, lower PGA gain limit -1dB */
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wm8775_write(client, R20, 0x07a);
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wm8775_write(sd, R20, 0x07a);
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/* LRBOTH = 1, use input 2. */
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wm8775_write(client, R21, 0x102);
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wm8775_write(sd, R21, 0x102);
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return 0;
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}
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static int wm8775_remove(struct i2c_client *client)
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{
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kfree(i2c_get_clientdata(client));
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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v4l2_device_unregister_subdev(sd);
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kfree(to_state(sd));
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return 0;
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}
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