#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.h>
};
struct wm8739_state {
+ struct v4l2_subdev sd;
u32 clock_freq;
u8 muted;
u16 volume;
u8 vol_r; /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
};
+static inline struct wm8739_state *to_state(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct wm8739_state, sd);
+}
+
/* ------------------------------------------------------------------------ */
-static int wm8739_write(struct i2c_client *client, int reg, u16 val)
+static int wm8739_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;
}
- v4l_dbg(1, debug, client, "write: %02x %02x\n", reg, val);
+ v4l2_dbg(1, debug, sd, "write: %02x %02x\n", reg, val);
for (i = 0; i < 3; i++)
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;
}
/* write regs to set audio volume etc */
-static void wm8739_set_audio(struct i2c_client *client)
+static void wm8739_set_audio(struct v4l2_subdev *sd)
{
- struct wm8739_state *state = i2c_get_clientdata(client);
+ struct wm8739_state *state = to_state(sd);
u16 mute = state->muted ? 0x80 : 0;
/* Volume setting: bits 0-4, 0x1f = 12 dB, 0x00 = -34.5 dB
* Default setting: 0x17 = 0 dB
*/
- wm8739_write(client, R0, (state->vol_l & 0x1f) | mute);
- wm8739_write(client, R1, (state->vol_r & 0x1f) | mute);
+ wm8739_write(sd, R0, (state->vol_l & 0x1f) | mute);
+ wm8739_write(sd, R1, (state->vol_r & 0x1f) | mute);
}
-static int wm8739_get_ctrl(struct i2c_client *client, struct v4l2_control *ctrl)
+static int wm8739_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
- struct wm8739_state *state = i2c_get_clientdata(client);
+ struct wm8739_state *state = to_state(sd);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
return 0;
}
-static int wm8739_set_ctrl(struct i2c_client *client, struct v4l2_control *ctrl)
+static int wm8739_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
- struct wm8739_state *state = i2c_get_clientdata(client);
+ struct wm8739_state *state = to_state(sd);
unsigned int work_l, work_r;
switch (ctrl->id) {
state->vol_r = (long)work_r * 31 / 65535;
/* set audio volume etc. */
- wm8739_set_audio(client);
+ wm8739_set_audio(sd);
return 0;
}
/* ------------------------------------------------------------------------ */
-static int wm8739_command(struct i2c_client *client, unsigned cmd, void *arg)
+static int wm8739_s_clock_freq(struct v4l2_subdev *sd, u32 audiofreq)
{
- struct wm8739_state *state = i2c_get_clientdata(client);
-
- switch (cmd) {
- case VIDIOC_INT_AUDIO_CLOCK_FREQ:
- {
- u32 audiofreq = *(u32 *)arg;
-
- state->clock_freq = audiofreq;
- /* de-activate */
- wm8739_write(client, R9, 0x000);
- switch (audiofreq) {
- case 44100:
- /* 256fps, fs=44.1k */
- wm8739_write(client, R8, 0x020);
- break;
- case 48000:
- /* 256fps, fs=48k */
- wm8739_write(client, R8, 0x000);
- break;
- case 32000:
- /* 256fps, fs=32k */
- wm8739_write(client, R8, 0x018);
- break;
- default:
- break;
- }
- /* activate */
- wm8739_write(client, R9, 0x001);
+ struct wm8739_state *state = to_state(sd);
+
+ state->clock_freq = audiofreq;
+ /* de-activate */
+ wm8739_write(sd, R9, 0x000);
+ switch (audiofreq) {
+ case 44100:
+ /* 256fps, fs=44.1k */
+ wm8739_write(sd, R8, 0x020);
+ break;
+ case 48000:
+ /* 256fps, fs=48k */
+ wm8739_write(sd, R8, 0x000);
+ break;
+ case 32000:
+ /* 256fps, fs=32k */
+ wm8739_write(sd, R8, 0x018);
+ break;
+ default:
break;
}
+ /* activate */
+ wm8739_write(sd, R9, 0x001);
+ return 0;
+}
- case VIDIOC_G_CTRL:
- return wm8739_get_ctrl(client, arg);
-
- case VIDIOC_S_CTRL:
- return wm8739_set_ctrl(client, arg);
+static int wm8739_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
+{
+ int i;
- case VIDIOC_QUERYCTRL:
- {
- struct v4l2_queryctrl *qc = arg;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(wm8739_qctrl); i++)
- if (qc->id && qc->id == wm8739_qctrl[i].id) {
- memcpy(qc, &wm8739_qctrl[i], sizeof(*qc));
- return 0;
- }
- return -EINVAL;
- }
+ for (i = 0; i < ARRAY_SIZE(wm8739_qctrl); i++)
+ if (qc->id && qc->id == wm8739_qctrl[i].id) {
+ memcpy(qc, &wm8739_qctrl[i], sizeof(*qc));
+ return 0;
+ }
+ return -EINVAL;
+}
- case VIDIOC_G_CHIP_IDENT:
- return v4l2_chip_ident_i2c_client(client,
- arg, V4L2_IDENT_WM8739, 0);
+static int wm8739_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_chip_ident *chip)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
- case VIDIOC_LOG_STATUS:
- v4l_info(client, "Frequency: %u Hz\n", state->clock_freq);
- v4l_info(client, "Volume L: %02x%s\n", state->vol_l & 0x1f,
- state->muted ? " (muted)" : "");
- v4l_info(client, "Volume R: %02x%s\n", state->vol_r & 0x1f,
- state->muted ? " (muted)" : "");
- break;
+ return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_WM8739, 0);
+}
- default:
- return -EINVAL;
- }
+static int wm8739_log_status(struct v4l2_subdev *sd)
+{
+ struct wm8739_state *state = to_state(sd);
+ v4l2_info(sd, "Frequency: %u Hz\n", state->clock_freq);
+ v4l2_info(sd, "Volume L: %02x%s\n", state->vol_l & 0x1f,
+ state->muted ? " (muted)" : "");
+ v4l2_info(sd, "Volume R: %02x%s\n", state->vol_r & 0x1f,
+ state->muted ? " (muted)" : "");
return 0;
}
+static int wm8739_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 wm8739_core_ops = {
+ .log_status = wm8739_log_status,
+ .g_chip_ident = wm8739_g_chip_ident,
+ .queryctrl = wm8739_queryctrl,
+ .g_ctrl = wm8739_g_ctrl,
+ .s_ctrl = wm8739_s_ctrl,
+};
+
+static const struct v4l2_subdev_audio_ops wm8739_audio_ops = {
+ .s_clock_freq = wm8739_s_clock_freq,
+};
+
+static const struct v4l2_subdev_ops wm8739_ops = {
+ .core = &wm8739_core_ops,
+ .audio = &wm8739_audio_ops,
+};
+
/* ------------------------------------------------------------------------ */
/* i2c implementation */
const struct i2c_device_id *id)
{
struct wm8739_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))
state = kmalloc(sizeof(struct wm8739_state), GFP_KERNEL);
if (state == NULL)
return -ENOMEM;
+ sd = &state->sd;
+ v4l2_i2c_subdev_init(sd, client, &wm8739_ops);
state->vol_l = 0x17; /* 0dB */
state->vol_r = 0x17; /* 0dB */
state->muted = 0;
/* normalize (12dB(31) to -34.5dB(0) [0dB(23)] -> 65535 to 0) */
state->volume = ((long)state->vol_l + 1) * 65535 / 31;
state->clock_freq = 48000;
- i2c_set_clientdata(client, state);
/* Initialize wm8739 */
/* reset */
- wm8739_write(client, R15, 0x00);
+ wm8739_write(sd, R15, 0x00);
/* filter setting, high path, offet clear */
- wm8739_write(client, R5, 0x000);
+ wm8739_write(sd, R5, 0x000);
/* ADC, OSC, Power Off mode Disable */
- wm8739_write(client, R6, 0x000);
+ wm8739_write(sd, R6, 0x000);
/* Digital Audio interface format:
Enable Master mode, 24 bit, MSB first/left justified */
- wm8739_write(client, R7, 0x049);
+ wm8739_write(sd, R7, 0x049);
/* sampling control: normal, 256fs, 48KHz sampling rate */
- wm8739_write(client, R8, 0x000);
+ wm8739_write(sd, R8, 0x000);
/* activate */
- wm8739_write(client, R9, 0x001);
+ wm8739_write(sd, R9, 0x001);
/* set volume/mute */
- wm8739_set_audio(client);
+ wm8739_set_audio(sd);
return 0;
}
static int wm8739_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;
}
projects / kernel / kernel-generic.git / commitdiff