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path: root/drivers/media/video/wm8775.c
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Diffstat (limited to 'drivers/media/video/wm8775.c')
-rw-r--r--drivers/media/video/wm8775.c221
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;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 07:59:29 +0000