![Sakari Ailus](/assets/img/avatar_default.png)
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 Of the 628 removed instances, 578 are outdated.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>
217 lines
5.6 KiB
C
217 lines
5.6 KiB
C
/*
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* tlv320aic23b - driver version 0.0.1
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*
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* Copyright (C) 2006 Scott Alfter <salfter@ssai.us>
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*
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* Based on wm8775 driver
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*
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* Copyright (C) 2004 Ulf Eklund <ivtv at eklund.to>
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* Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
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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("tlv320aic23b driver");
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MODULE_AUTHOR("Scott Alfter, Ulf Eklund, Hans Verkuil");
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MODULE_LICENSE("GPL");
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/* ----------------------------------------------------------------------- */
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struct tlv320aic23b_state {
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struct v4l2_subdev sd;
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struct v4l2_ctrl_handler hdl;
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};
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static inline struct tlv320aic23b_state *to_state(struct v4l2_subdev *sd)
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{
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return container_of(sd, struct tlv320aic23b_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 tlv320aic23b_state, hdl)->sd;
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}
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static int tlv320aic23b_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 > 9) && (reg != 15)) {
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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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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 tlv320aic23b_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
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{
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switch (freq) {
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case 32000: /* set sample rate to 32 kHz */
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tlv320aic23b_write(sd, 8, 0x018);
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break;
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case 44100: /* set sample rate to 44.1 kHz */
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tlv320aic23b_write(sd, 8, 0x022);
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break;
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case 48000: /* set sample rate to 48 kHz */
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tlv320aic23b_write(sd, 8, 0x000);
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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 tlv320aic23b_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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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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tlv320aic23b_write(sd, 0, 0x180); /* mute both channels */
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/* set gain on both channels to +3.0 dB */
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if (!ctrl->val)
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tlv320aic23b_write(sd, 0, 0x119);
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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 tlv320aic23b_log_status(struct v4l2_subdev *sd)
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{
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struct tlv320aic23b_state *state = to_state(sd);
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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 tlv320aic23b_ctrl_ops = {
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.s_ctrl = tlv320aic23b_s_ctrl,
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};
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static const struct v4l2_subdev_core_ops tlv320aic23b_core_ops = {
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.log_status = tlv320aic23b_log_status,
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};
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static const struct v4l2_subdev_audio_ops tlv320aic23b_audio_ops = {
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.s_clock_freq = tlv320aic23b_s_clock_freq,
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};
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static const struct v4l2_subdev_ops tlv320aic23b_ops = {
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.core = &tlv320aic23b_core_ops,
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.audio = &tlv320aic23b_audio_ops,
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};
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/* ----------------------------------------------------------------------- */
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/* i2c implementation */
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/*
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* Generic i2c probe
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* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
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*/
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static int tlv320aic23b_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct tlv320aic23b_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, &tlv320aic23b_ops);
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/* Initialize tlv320aic23b */
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/* RESET */
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tlv320aic23b_write(sd, 15, 0x000);
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/* turn off DAC & mic input */
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tlv320aic23b_write(sd, 6, 0x00A);
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/* left-justified, 24-bit, master mode */
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tlv320aic23b_write(sd, 7, 0x049);
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/* set gain on both channels to +3.0 dB */
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tlv320aic23b_write(sd, 0, 0x119);
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/* set sample rate to 48 kHz */
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tlv320aic23b_write(sd, 8, 0x000);
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/* activate digital interface */
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tlv320aic23b_write(sd, 9, 0x001);
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v4l2_ctrl_handler_init(&state->hdl, 1);
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v4l2_ctrl_new_std(&state->hdl, &tlv320aic23b_ctrl_ops,
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V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
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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_handler_setup(&state->hdl);
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return 0;
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}
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static int tlv320aic23b_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 tlv320aic23b_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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/* ----------------------------------------------------------------------- */
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static const struct i2c_device_id tlv320aic23b_id[] = {
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{ "tlv320aic23b", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, tlv320aic23b_id);
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static struct i2c_driver tlv320aic23b_driver = {
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.driver = {
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.name = "tlv320aic23b",
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},
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.probe = tlv320aic23b_probe,
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.remove = tlv320aic23b_remove,
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.id_table = tlv320aic23b_id,
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};
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module_i2c_driver(tlv320aic23b_driver);
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