bcb63314e2
Drop the FSF's postal address from the source code files that typically
contain mostly the license text. Of the 628 removed instances, 578 are
outdated.
The patch has been created with the following command without manual edits:
git grep -l "675 Mass Ave\|59 Temple Place\|51 Franklin St" -- \
drivers/media/ include/media|while read i; do i=$i perl -e '
open(F,"< $ENV{i}");
$a=join("", <F>);
$a =~ s/[ \t]*\*\n.*You should.*\n.*along with.*\n.*(\n.*USA.*$)?\n//m
&& $a =~ s/(^.*)Or, (point your browser to) /$1To obtain the license, $2\n$1/m;
close(F);
open(F, "> $ENV{i}");
print F $a;
close(F);'; done
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
272 lines
6.8 KiB
C
272 lines
6.8 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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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/ioctl.h>
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#include <linux/uaccess.h>
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#include <linux/i2c.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-ctrls.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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struct v4l2_ctrl_handler hdl;
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struct {
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/* audio cluster */
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struct v4l2_ctrl *volume;
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struct v4l2_ctrl *mute;
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struct v4l2_ctrl *balance;
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};
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u32 clock_freq;
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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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static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
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{
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return &container_of(ctrl->handler, struct wm8739_state, hdl)->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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static int wm8739_s_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct v4l2_subdev *sd = to_sd(ctrl);
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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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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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u16 mute;
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_VOLUME:
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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->val, 32768) * state->volume->val) / 32768;
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work_r = (min(state->balance->val, 32768) * state->volume->val) / 32768;
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vol_l = (long)work_l * 31 / 65535;
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vol_r = (long)work_r * 31 / 65535;
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/* set audio volume etc. */
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mute = state->mute->val ? 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, (vol_l & 0x1f) | mute);
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wm8739_write(sd, R1, (vol_r & 0x1f) | mute);
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return 0;
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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_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_ctrl_handler_log_status(&state->hdl, sd->name);
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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static const struct v4l2_ctrl_ops wm8739_ctrl_ops = {
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.s_ctrl = wm8739_s_ctrl,
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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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};
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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 = devm_kzalloc(&client->dev, sizeof(*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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v4l2_ctrl_handler_init(&state->hdl, 2);
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state->volume = v4l2_ctrl_new_std(&state->hdl, &wm8739_ctrl_ops,
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V4L2_CID_AUDIO_VOLUME, 0, 65535, 65535 / 100, 50736);
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state->mute = v4l2_ctrl_new_std(&state->hdl, &wm8739_ctrl_ops,
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V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
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state->balance = v4l2_ctrl_new_std(&state->hdl, &wm8739_ctrl_ops,
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V4L2_CID_AUDIO_BALANCE, 0, 65535, 65535 / 100, 32768);
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sd->ctrl_handler = &state->hdl;
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if (state->hdl.error) {
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int err = state->hdl.error;
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v4l2_ctrl_handler_free(&state->hdl);
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return err;
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}
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v4l2_ctrl_cluster(3, &state->volume);
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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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v4l2_ctrl_handler_setup(&state->hdl);
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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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struct wm8739_state *state = to_state(sd);
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v4l2_device_unregister_subdev(sd);
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v4l2_ctrl_handler_free(&state->hdl);
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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 i2c_driver wm8739_driver = {
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.driver = {
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.name = "wm8739",
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},
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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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module_i2c_driver(wm8739_driver);
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