mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-05 10:29:37 +00:00
V4L/DVB (3661): Add wm8739 stereo audio ADC i2c driver
Add support for the Wolfson Microelectronics WM8739 stereo A/D converter from the ivtv driver. Many thanks to Takahiro Adachi for writing the original driver. Signed-off-by: Takahiro Adachi <tadachi@tadachi-net.com> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
parent
953a676c83
commit
75c4570ca4
3 changed files with 369 additions and 3 deletions
|
@ -343,15 +343,25 @@ config VIDEO_CS53L32A
|
|||
module will be called cs53l32a
|
||||
|
||||
config VIDEO_WM8775
|
||||
tristate "Wolfson Microelectronics WM8775 audio ADC"
|
||||
tristate "Wolfson Microelectronics WM8775 audio ADC with input mixer"
|
||||
depends on VIDEO_DEV && I2C && EXPERIMENTAL
|
||||
---help---
|
||||
Support for the Wolfson Microelectronics WM8775
|
||||
high performance stereo A/D Converter.
|
||||
Support for the Wolfson Microelectronics WM8775 high
|
||||
performance stereo A/D Converter with a 4 channel input mixer.
|
||||
|
||||
To compile this driver as a module, choose M here: the
|
||||
module will be called wm8775
|
||||
|
||||
config VIDEO_WM8739
|
||||
tristate "Wolfson Microelectronics WM8739 stereo audio ADC"
|
||||
depends on VIDEO_DEV && I2C && EXPERIMENTAL
|
||||
---help---
|
||||
Support for the Wolfson Microelectronics WM8739
|
||||
stereo A/D Converter.
|
||||
|
||||
To compile this driver as a module, choose M here: the
|
||||
module will be called wm8739
|
||||
|
||||
source "drivers/media/video/cx25840/Kconfig"
|
||||
|
||||
config VIDEO_SAA711X
|
||||
|
|
|
@ -45,6 +45,7 @@ obj-$(CONFIG_VIDEO_EM28XX) += tvp5150.o
|
|||
obj-$(CONFIG_VIDEO_MSP3400) += msp3400.o
|
||||
obj-$(CONFIG_VIDEO_CS53L32A) += cs53l32a.o
|
||||
obj-$(CONFIG_VIDEO_WM8775) += wm8775.o
|
||||
obj-$(CONFIG_VIDEO_WM8739) += wm8739.o
|
||||
obj-$(CONFIG_VIDEO_OVCAMCHIP) += ovcamchip/
|
||||
obj-$(CONFIG_VIDEO_CPIA2) += cpia2/
|
||||
obj-$(CONFIG_VIDEO_MXB) += saa7111.o tda9840.o tea6415c.o tea6420.o mxb.o
|
||||
|
|
355
drivers/media/video/wm8739.c
Normal file
355
drivers/media/video/wm8739.c
Normal file
|
@ -0,0 +1,355 @@
|
|||
/*
|
||||
* 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/ioctl.h>
|
||||
#include <asm/uaccess.h>
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/i2c-id.h>
|
||||
#include <linux/videodev.h>
|
||||
#include <media/v4l2-common.h>
|
||||
|
||||
MODULE_DESCRIPTION("wm8739 driver");
|
||||
MODULE_AUTHOR("T. Adachi, Hans Verkuil");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
static int debug = 0;
|
||||
static unsigned short normal_i2c[] = { 0x34 >> 1, 0x36 >> 1, I2C_CLIENT_END };
|
||||
|
||||
module_param(debug, int, 0644);
|
||||
|
||||
MODULE_PARM_DESC(debug, "Debug level (0-1)");
|
||||
|
||||
|
||||
I2C_CLIENT_INSMOD;
|
||||
|
||||
/* ------------------------------------------------------------------------ */
|
||||
|
||||
enum {
|
||||
R0 = 0, R1,
|
||||
R5 = 5, R6, R7, R8, R9, R15 = 15,
|
||||
TOT_REGS
|
||||
};
|
||||
|
||||
struct wm8739_state {
|
||||
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 int wm8739_write(struct i2c_client *client, int reg, u16 val)
|
||||
{
|
||||
int i;
|
||||
|
||||
if (reg < 0 || reg >= TOT_REGS) {
|
||||
v4l_err(client, "Invalid register R%d\n", reg);
|
||||
return -1;
|
||||
}
|
||||
|
||||
v4l_dbg(1, debug, client, "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);
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* write regs to set audio volume etc */
|
||||
static void wm8739_set_audio(struct i2c_client *client)
|
||||
{
|
||||
struct wm8739_state *state = i2c_get_clientdata(client);
|
||||
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);
|
||||
}
|
||||
|
||||
static int wm8739_get_ctrl(struct i2c_client *client, struct v4l2_control *ctrl)
|
||||
{
|
||||
struct wm8739_state *state = i2c_get_clientdata(client);
|
||||
|
||||
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_set_ctrl(struct i2c_client *client, struct v4l2_control *ctrl)
|
||||
{
|
||||
struct wm8739_state *state = i2c_get_clientdata(client);
|
||||
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(client);
|
||||
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_command(struct i2c_client *client, unsigned int cmd, void *arg)
|
||||
{
|
||||
struct wm8739_state *state = i2c_get_clientdata(client);
|
||||
|
||||
switch (cmd) {
|
||||
case VIDIOC_INT_AUDIO_CLOCK_FREQ:
|
||||
{
|
||||
u32 audiofreq = *(u32 *)arg;
|
||||
|
||||
state->clock_freq = audiofreq;
|
||||
wm8739_write(client, R9, 0x000); /* de-activate */
|
||||
switch (audiofreq) {
|
||||
case 44100:
|
||||
wm8739_write(client, R8, 0x020); /* 256fps, fs=44.1k */
|
||||
break;
|
||||
case 48000:
|
||||
wm8739_write(client, R8, 0x000); /* 256fps, fs=48k */
|
||||
break;
|
||||
case 32000:
|
||||
wm8739_write(client, R8, 0x018); /* 256fps, fs=32k */
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
wm8739_write(client, R9, 0x001); /* activate */
|
||||
break;
|
||||
}
|
||||
|
||||
case VIDIOC_G_CTRL:
|
||||
return wm8739_get_ctrl(client, arg);
|
||||
|
||||
case VIDIOC_S_CTRL:
|
||||
return wm8739_set_ctrl(client, arg);
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
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;
|
||||
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* ------------------------------------------------------------------------ */
|
||||
|
||||
/* i2c implementation */
|
||||
|
||||
static struct i2c_driver i2c_driver;
|
||||
|
||||
static int wm8739_attach(struct i2c_adapter *adapter, int address, int kind)
|
||||
{
|
||||
struct i2c_client *client;
|
||||
struct wm8739_state *state;
|
||||
|
||||
/* Check if the adapter supports the needed features */
|
||||
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
||||
return 0;
|
||||
|
||||
client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
|
||||
if (client == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
client->addr = address;
|
||||
client->adapter = adapter;
|
||||
client->driver = &i2c_driver;
|
||||
snprintf(client->name, sizeof(client->name) - 1, "wm8739");
|
||||
|
||||
v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
|
||||
|
||||
state = kmalloc(sizeof(struct wm8739_state), GFP_KERNEL);
|
||||
if (state == NULL) {
|
||||
kfree(client);
|
||||
return -ENOMEM;
|
||||
}
|
||||
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;
|
||||
i2c_set_clientdata(client, state);
|
||||
|
||||
/* initialize wm8739 */
|
||||
wm8739_write(client, R15, 0x00); /* reset */
|
||||
wm8739_write(client, R5, 0x000); /* filter setting, high path, offet clear */
|
||||
wm8739_write(client, R6, 0x000); /* ADC, OSC, Power Off mode Disable */
|
||||
wm8739_write(client, R7, 0x049); /* Digital Audio interface format */
|
||||
/* Enable Master mode */
|
||||
/* 24 bit, MSB first/left justified */
|
||||
wm8739_write(client, R8, 0x000); /* sampling control */
|
||||
/* normal, 256fs, 48KHz sampling rate */
|
||||
wm8739_write(client, R9, 0x001); /* activate */
|
||||
wm8739_set_audio(client); /* set volume/mute */
|
||||
|
||||
i2c_attach_client(client);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int wm8739_probe(struct i2c_adapter *adapter)
|
||||
{
|
||||
if (adapter->class & I2C_CLASS_TV_ANALOG)
|
||||
return i2c_probe(adapter, &addr_data, wm8739_attach);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int wm8739_detach(struct i2c_client *client)
|
||||
{
|
||||
int err;
|
||||
|
||||
err = i2c_detach_client(client);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
kfree(client);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* ----------------------------------------------------------------------- */
|
||||
|
||||
/* i2c implementation */
|
||||
static struct i2c_driver i2c_driver = {
|
||||
.driver = {
|
||||
.name = "wm8739",
|
||||
},
|
||||
.id = I2C_DRIVERID_WM8739,
|
||||
.attach_adapter = wm8739_probe,
|
||||
.detach_client = wm8739_detach,
|
||||
.command = wm8739_command,
|
||||
};
|
||||
|
||||
|
||||
static int __init wm8739_init_module(void)
|
||||
{
|
||||
return i2c_add_driver(&i2c_driver);
|
||||
}
|
||||
|
||||
static void __exit wm8739_cleanup_module(void)
|
||||
{
|
||||
i2c_del_driver(&i2c_driver);
|
||||
}
|
||||
|
||||
module_init(wm8739_init_module);
|
||||
module_exit(wm8739_cleanup_module);
|
Loading…
Reference in a new issue