346 lines
8.5 KiB
C
346 lines
8.5 KiB
C
/*
|
|
* wm8739
|
|
*
|
|
* Copyright (C) 2005 T. Adachi <tadachi@tadachi-net.com>
|
|
*
|
|
* Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
|
|
* - Cleanup
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/ioctl.h>
|
|
#include <asm/uaccess.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/i2c-id.h>
|
|
#include <linux/videodev2.h>
|
|
#include <media/v4l2-device.h>
|
|
#include <media/v4l2-chip-ident.h>
|
|
#include <media/v4l2-i2c-drv.h>
|
|
|
|
MODULE_DESCRIPTION("wm8739 driver");
|
|
MODULE_AUTHOR("T. Adachi, Hans Verkuil");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static int debug;
|
|
|
|
module_param(debug, int, 0644);
|
|
|
|
MODULE_PARM_DESC(debug, "Debug level (0-1)");
|
|
|
|
|
|
/* ------------------------------------------------------------------------ */
|
|
|
|
enum {
|
|
R0 = 0, R1,
|
|
R5 = 5, R6, R7, R8, R9, R15 = 15,
|
|
TOT_REGS
|
|
};
|
|
|
|
struct wm8739_state {
|
|
struct v4l2_subdev sd;
|
|
u32 clock_freq;
|
|
u8 muted;
|
|
u16 volume;
|
|
u16 balance;
|
|
u8 vol_l; /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
|
|
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 v4l2_subdev *sd, int reg, u16 val)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
int i;
|
|
|
|
if (reg < 0 || reg >= TOT_REGS) {
|
|
v4l2_err(sd, "Invalid register R%d\n", reg);
|
|
return -1;
|
|
}
|
|
|
|
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;
|
|
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 v4l2_subdev *sd)
|
|
{
|
|
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(sd, R0, (state->vol_l & 0x1f) | mute);
|
|
wm8739_write(sd, R1, (state->vol_r & 0x1f) | mute);
|
|
}
|
|
|
|
static int wm8739_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
|
|
{
|
|
struct wm8739_state *state = to_state(sd);
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_AUDIO_MUTE:
|
|
ctrl->value = state->muted;
|
|
break;
|
|
|
|
case V4L2_CID_AUDIO_VOLUME:
|
|
ctrl->value = state->volume;
|
|
break;
|
|
|
|
case V4L2_CID_AUDIO_BALANCE:
|
|
ctrl->value = state->balance;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int wm8739_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
|
|
{
|
|
struct wm8739_state *state = to_state(sd);
|
|
unsigned int work_l, work_r;
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_AUDIO_MUTE:
|
|
state->muted = ctrl->value;
|
|
break;
|
|
|
|
case V4L2_CID_AUDIO_VOLUME:
|
|
state->volume = ctrl->value;
|
|
break;
|
|
|
|
case V4L2_CID_AUDIO_BALANCE:
|
|
state->balance = ctrl->value;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* normalize ( 65535 to 0 -> 31 to 0 (12dB to -34.5dB) ) */
|
|
work_l = (min(65536 - state->balance, 32768) * state->volume) / 32768;
|
|
work_r = (min(state->balance, (u16)32768) * state->volume) / 32768;
|
|
|
|
state->vol_l = (long)work_l * 31 / 65535;
|
|
state->vol_r = (long)work_r * 31 / 65535;
|
|
|
|
/* set audio volume etc. */
|
|
wm8739_set_audio(sd);
|
|
return 0;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------ */
|
|
|
|
static struct v4l2_queryctrl wm8739_qctrl[] = {
|
|
{
|
|
.id = V4L2_CID_AUDIO_VOLUME,
|
|
.name = "Volume",
|
|
.minimum = 0,
|
|
.maximum = 65535,
|
|
.step = 65535/100,
|
|
.default_value = 58880,
|
|
.flags = 0,
|
|
.type = V4L2_CTRL_TYPE_INTEGER,
|
|
}, {
|
|
.id = V4L2_CID_AUDIO_MUTE,
|
|
.name = "Mute",
|
|
.minimum = 0,
|
|
.maximum = 1,
|
|
.step = 1,
|
|
.default_value = 1,
|
|
.flags = 0,
|
|
.type = V4L2_CTRL_TYPE_BOOLEAN,
|
|
}, {
|
|
.id = V4L2_CID_AUDIO_BALANCE,
|
|
.name = "Balance",
|
|
.minimum = 0,
|
|
.maximum = 65535,
|
|
.step = 65535/100,
|
|
.default_value = 32768,
|
|
.flags = 0,
|
|
.type = V4L2_CTRL_TYPE_INTEGER,
|
|
}
|
|
};
|
|
|
|
/* ------------------------------------------------------------------------ */
|
|
|
|
static int wm8739_s_clock_freq(struct v4l2_subdev *sd, u32 audiofreq)
|
|
{
|
|
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;
|
|
}
|
|
|
|
static int wm8739_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
|
|
{
|
|
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;
|
|
}
|
|
|
|
static int wm8739_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
|
|
return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_WM8739, 0);
|
|
}
|
|
|
|
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 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 */
|
|
|
|
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))
|
|
return -EIO;
|
|
|
|
v4l_info(client, "chip found @ 0x%x (%s)\n",
|
|
client->addr << 1, client->adapter->name);
|
|
|
|
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;
|
|
state->balance = 32768;
|
|
/* 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;
|
|
|
|
/* Initialize wm8739 */
|
|
|
|
/* reset */
|
|
wm8739_write(sd, R15, 0x00);
|
|
/* filter setting, high path, offet clear */
|
|
wm8739_write(sd, R5, 0x000);
|
|
/* ADC, OSC, Power Off mode Disable */
|
|
wm8739_write(sd, R6, 0x000);
|
|
/* Digital Audio interface format:
|
|
Enable Master mode, 24 bit, MSB first/left justified */
|
|
wm8739_write(sd, R7, 0x049);
|
|
/* sampling control: normal, 256fs, 48KHz sampling rate */
|
|
wm8739_write(sd, R8, 0x000);
|
|
/* activate */
|
|
wm8739_write(sd, R9, 0x001);
|
|
/* set volume/mute */
|
|
wm8739_set_audio(sd);
|
|
return 0;
|
|
}
|
|
|
|
static int wm8739_remove(struct i2c_client *client)
|
|
{
|
|
struct v4l2_subdev *sd = i2c_get_clientdata(client);
|
|
|
|
v4l2_device_unregister_subdev(sd);
|
|
kfree(to_state(sd));
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id wm8739_id[] = {
|
|
{ "wm8739", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, wm8739_id);
|
|
|
|
static struct v4l2_i2c_driver_data v4l2_i2c_data = {
|
|
.name = "wm8739",
|
|
.probe = wm8739_probe,
|
|
.remove = wm8739_remove,
|
|
.id_table = wm8739_id,
|
|
};
|