diff options
| -rw-r--r-- | drivers/media/video/wm8739.c | 188 |
1 files changed, 106 insertions, 82 deletions
diff --git a/drivers/media/video/wm8739.c b/drivers/media/video/wm8739.c index 54ac3fe26ec..12a31e7a5f6 100644 --- a/drivers/media/video/wm8739.c +++ b/drivers/media/video/wm8739.c @@ -28,7 +28,7 @@ #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.h> @@ -52,6 +52,7 @@ enum { }; struct wm8739_state { + struct v4l2_subdev sd; u32 clock_freq; u8 muted; u16 volume; @@ -60,43 +61,49 @@ struct wm8739_state { 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: @@ -117,9 +124,9 @@ static int wm8739_get_ctrl(struct i2c_client *client, struct v4l2_control *ctrl) 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) { @@ -147,7 +154,7 @@ static int wm8739_set_ctrl(struct i2c_client *client, struct v4l2_control *ctrl) state->vol_r = (long)work_r * 31 / 65535; /* set audio volume etc. */ - wm8739_set_audio(client); + wm8739_set_audio(sd); return 0; } @@ -186,77 +193,89 @@ static struct v4l2_queryctrl wm8739_qctrl[] = { /* ------------------------------------------------------------------------ */ -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 */ @@ -265,6 +284,7 @@ static int wm8739_probe(struct i2c_client *client, 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)) @@ -276,6 +296,8 @@ static int wm8739_probe(struct i2c_client *client, 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; @@ -283,31 +305,33 @@ static int wm8739_probe(struct i2c_client *client, /* 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; } |