forked from Minki/linux
aecde8b53b
Since the i2c driver ID will be removed in the near future we have to modify the v4l2 debugging API to use the driver name instead of driver ID. Note that this API is not used in applications other than v4l2-dbg.cpp as it is for debugging and testing only. Should anyone use the old VIDIOC_G_CHIP_IDENT, then this will be logged with a warning that it is deprecated and will be removed in 2.6.30. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
352 lines
8.7 KiB
C
352 lines
8.7 KiB
C
/*
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* wm8739
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*
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* Copyright (C) 2005 T. Adachi <tadachi@tadachi-net.com>
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*
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* Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
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* - Cleanup
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/ioctl.h>
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#include <asm/uaccess.h>
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#include <linux/i2c.h>
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#include <linux/i2c-id.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-chip-ident.h>
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#include <media/v4l2-i2c-drv.h>
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MODULE_DESCRIPTION("wm8739 driver");
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MODULE_AUTHOR("T. Adachi, Hans Verkuil");
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MODULE_LICENSE("GPL");
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static int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "Debug level (0-1)");
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/* ------------------------------------------------------------------------ */
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enum {
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R0 = 0, R1,
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R5 = 5, R6, R7, R8, R9, R15 = 15,
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TOT_REGS
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};
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struct wm8739_state {
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struct v4l2_subdev sd;
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u32 clock_freq;
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u8 muted;
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u16 volume;
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u16 balance;
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u8 vol_l; /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
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u8 vol_r; /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
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};
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static inline struct wm8739_state *to_state(struct v4l2_subdev *sd)
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{
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return container_of(sd, struct wm8739_state, sd);
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}
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/* ------------------------------------------------------------------------ */
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static int wm8739_write(struct v4l2_subdev *sd, int reg, u16 val)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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int i;
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if (reg < 0 || reg >= TOT_REGS) {
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v4l2_err(sd, "Invalid register R%d\n", reg);
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return -1;
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}
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v4l2_dbg(1, debug, sd, "write: %02x %02x\n", reg, val);
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for (i = 0; i < 3; i++)
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if (i2c_smbus_write_byte_data(client,
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(reg << 1) | (val >> 8), val & 0xff) == 0)
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return 0;
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v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg);
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return -1;
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}
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/* write regs to set audio volume etc */
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static void wm8739_set_audio(struct v4l2_subdev *sd)
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{
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struct wm8739_state *state = to_state(sd);
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u16 mute = state->muted ? 0x80 : 0;
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/* Volume setting: bits 0-4, 0x1f = 12 dB, 0x00 = -34.5 dB
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* Default setting: 0x17 = 0 dB
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*/
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wm8739_write(sd, R0, (state->vol_l & 0x1f) | mute);
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wm8739_write(sd, R1, (state->vol_r & 0x1f) | mute);
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}
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static int wm8739_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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{
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struct wm8739_state *state = to_state(sd);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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ctrl->value = state->muted;
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break;
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case V4L2_CID_AUDIO_VOLUME:
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ctrl->value = state->volume;
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break;
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case V4L2_CID_AUDIO_BALANCE:
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ctrl->value = state->balance;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int wm8739_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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{
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struct wm8739_state *state = to_state(sd);
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unsigned int work_l, work_r;
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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state->muted = ctrl->value;
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break;
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case V4L2_CID_AUDIO_VOLUME:
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state->volume = ctrl->value;
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break;
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case V4L2_CID_AUDIO_BALANCE:
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state->balance = ctrl->value;
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break;
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default:
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return -EINVAL;
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}
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/* normalize ( 65535 to 0 -> 31 to 0 (12dB to -34.5dB) ) */
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work_l = (min(65536 - state->balance, 32768) * state->volume) / 32768;
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work_r = (min(state->balance, (u16)32768) * state->volume) / 32768;
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state->vol_l = (long)work_l * 31 / 65535;
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state->vol_r = (long)work_r * 31 / 65535;
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/* set audio volume etc. */
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wm8739_set_audio(sd);
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return 0;
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}
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/* ------------------------------------------------------------------------ */
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static struct v4l2_queryctrl wm8739_qctrl[] = {
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{
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.id = V4L2_CID_AUDIO_VOLUME,
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.name = "Volume",
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.minimum = 0,
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.maximum = 65535,
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.step = 65535/100,
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.default_value = 58880,
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.flags = 0,
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.type = V4L2_CTRL_TYPE_INTEGER,
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}, {
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.id = V4L2_CID_AUDIO_MUTE,
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.name = "Mute",
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.minimum = 0,
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.maximum = 1,
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.step = 1,
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.default_value = 1,
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.flags = 0,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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}, {
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.id = V4L2_CID_AUDIO_BALANCE,
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.name = "Balance",
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.minimum = 0,
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.maximum = 65535,
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.step = 65535/100,
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.default_value = 32768,
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.flags = 0,
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.type = V4L2_CTRL_TYPE_INTEGER,
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}
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};
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/* ------------------------------------------------------------------------ */
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static int wm8739_s_clock_freq(struct v4l2_subdev *sd, u32 audiofreq)
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{
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struct wm8739_state *state = to_state(sd);
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state->clock_freq = audiofreq;
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/* de-activate */
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wm8739_write(sd, R9, 0x000);
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switch (audiofreq) {
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case 44100:
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/* 256fps, fs=44.1k */
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wm8739_write(sd, R8, 0x020);
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break;
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case 48000:
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/* 256fps, fs=48k */
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wm8739_write(sd, R8, 0x000);
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break;
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case 32000:
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/* 256fps, fs=32k */
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wm8739_write(sd, R8, 0x018);
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break;
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default:
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break;
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}
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/* activate */
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wm8739_write(sd, R9, 0x001);
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return 0;
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}
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static int wm8739_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(wm8739_qctrl); i++)
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if (qc->id && qc->id == wm8739_qctrl[i].id) {
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memcpy(qc, &wm8739_qctrl[i], sizeof(*qc));
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return 0;
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}
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return -EINVAL;
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}
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static int wm8739_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_WM8739, 0);
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}
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static int wm8739_log_status(struct v4l2_subdev *sd)
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{
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struct wm8739_state *state = to_state(sd);
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v4l2_info(sd, "Frequency: %u Hz\n", state->clock_freq);
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v4l2_info(sd, "Volume L: %02x%s\n", state->vol_l & 0x1f,
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state->muted ? " (muted)" : "");
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v4l2_info(sd, "Volume R: %02x%s\n", state->vol_r & 0x1f,
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state->muted ? " (muted)" : "");
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return 0;
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}
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static int wm8739_command(struct i2c_client *client, unsigned cmd, void *arg)
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{
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return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
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}
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/* ----------------------------------------------------------------------- */
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static const struct v4l2_subdev_core_ops wm8739_core_ops = {
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.log_status = wm8739_log_status,
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.g_chip_ident = wm8739_g_chip_ident,
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.queryctrl = wm8739_queryctrl,
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.g_ctrl = wm8739_g_ctrl,
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.s_ctrl = wm8739_s_ctrl,
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};
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static const struct v4l2_subdev_audio_ops wm8739_audio_ops = {
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.s_clock_freq = wm8739_s_clock_freq,
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};
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static const struct v4l2_subdev_ops wm8739_ops = {
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.core = &wm8739_core_ops,
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.audio = &wm8739_audio_ops,
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};
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/* ------------------------------------------------------------------------ */
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/* i2c implementation */
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static int wm8739_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct wm8739_state *state;
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struct v4l2_subdev *sd;
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/* Check if the adapter supports the needed features */
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return -EIO;
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v4l_info(client, "chip found @ 0x%x (%s)\n",
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client->addr << 1, client->adapter->name);
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state = kmalloc(sizeof(struct wm8739_state), GFP_KERNEL);
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if (state == NULL)
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return -ENOMEM;
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sd = &state->sd;
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v4l2_i2c_subdev_init(sd, client, &wm8739_ops);
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state->vol_l = 0x17; /* 0dB */
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state->vol_r = 0x17; /* 0dB */
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state->muted = 0;
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state->balance = 32768;
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/* normalize (12dB(31) to -34.5dB(0) [0dB(23)] -> 65535 to 0) */
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state->volume = ((long)state->vol_l + 1) * 65535 / 31;
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state->clock_freq = 48000;
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/* Initialize wm8739 */
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/* reset */
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wm8739_write(sd, R15, 0x00);
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/* filter setting, high path, offet clear */
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wm8739_write(sd, R5, 0x000);
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/* ADC, OSC, Power Off mode Disable */
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wm8739_write(sd, R6, 0x000);
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/* Digital Audio interface format:
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Enable Master mode, 24 bit, MSB first/left justified */
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wm8739_write(sd, R7, 0x049);
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/* sampling control: normal, 256fs, 48KHz sampling rate */
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wm8739_write(sd, R8, 0x000);
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/* activate */
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wm8739_write(sd, R9, 0x001);
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/* set volume/mute */
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wm8739_set_audio(sd);
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return 0;
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}
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static int wm8739_remove(struct i2c_client *client)
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{
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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v4l2_device_unregister_subdev(sd);
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kfree(to_state(sd));
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return 0;
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}
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static const struct i2c_device_id wm8739_id[] = {
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{ "wm8739", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, wm8739_id);
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static struct v4l2_i2c_driver_data v4l2_i2c_data = {
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.name = "wm8739",
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.driverid = I2C_DRIVERID_WM8739,
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.command = wm8739_command,
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.probe = wm8739_probe,
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.remove = wm8739_remove,
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.id_table = wm8739_id,
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};
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