blob: 27548ac1a2e896187397fa28a7513435852cceeb [file] [log] [blame]
/* Copyright (c) 2009-2011, The Linux Foundation. All rights reserved.
*
* Based on the mp3 native driver in arch/arm/mach-msm/qdsp5v2/audio_mp3.c
*
* Copyright (C) 2008 Google, Inc.
* Copyright (C) 2008 HTC Corporation
*
* All source code in this file is licensed under the following license except
* where indicated.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
* 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, you can find it at http://www.fsf.org
*/
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/miscdevice.h>
#include <linux/uaccess.h>
#include <linux/kthread.h>
#include <linux/wait.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/msm_audio.h>
#include <asm/atomic.h>
#include <asm/ioctls.h>
#include <mach/msm_adsp.h>
#include <mach/debug_mm.h>
#include <mach/qdsp5v2/audio_dev_ctl.h>
#include <mach/qdsp5v2/afe.h>
#include <mach/qdsp5v2/acdb_commands.h>
#include <mach/qdsp5v2/audio_acdbi.h>
#include <mach/qdsp5v2/audio_acdb_def.h>
#define SESSION_ID_FM 6
#define FM_ENABLE 0xFFFF
#define FM_DISABLE 0x0
#define FM_COPP 0x2
/* Macro specifies maximum FM routing
possible */
#define FM_MAX_RX_ROUTE 0x2
struct fm_rx_calib_gain {
uint16_t device_id;
struct auddev_evt_devinfo dev_details;
struct acdb_calib_gain_rx calib_rx;
};
struct audio {
struct mutex lock;
int opened;
int enabled;
int running;
uint16_t dec_id;
uint16_t source;
uint16_t fm_source;
uint16_t fm_mask;
uint32_t device_events;
uint16_t volume;
struct fm_rx_calib_gain fm_calibration_rx[FM_MAX_RX_ROUTE];
};
static struct audio fm_audio;
/* must be called with audio->lock held */
static int audio_enable(struct audio *audio)
{
int rc = 0;
if (audio->enabled)
return 0;
MM_DBG("fm mask= %08x fm_source = %08x\n",
audio->fm_mask, audio->fm_source);
if (audio->fm_mask && audio->fm_source) {
rc = afe_config_fm_codec(FM_ENABLE, audio->fm_mask);
if (!rc)
audio->running = 1;
/* Routed to icodec rx path */
if ((audio->fm_mask & AFE_HW_PATH_CODEC_RX) ==
AFE_HW_PATH_CODEC_RX) {
afe_config_fm_calibration_gain(
audio->fm_calibration_rx[0].device_id,
audio->fm_calibration_rx[0].calib_rx.audppcalgain);
}
/* Routed to aux codec rx path */
if ((audio->fm_mask & AFE_HW_PATH_AUXPCM_RX) ==
AFE_HW_PATH_AUXPCM_RX){
afe_config_fm_calibration_gain(
audio->fm_calibration_rx[1].device_id,
audio->fm_calibration_rx[1].calib_rx.audppcalgain);
}
}
audio->enabled = 1;
return rc;
}
static void fm_listner(u32 evt_id, union auddev_evt_data *evt_payload,
void *private_data)
{
struct audio *audio = (struct audio *) private_data;
struct auddev_evt_devinfo *devinfo =
(struct auddev_evt_devinfo *)evt_payload;
switch (evt_id) {
case AUDDEV_EVT_DEV_RDY:
MM_DBG(":AUDDEV_EVT_DEV_RDY\n");
if (evt_payload->routing_id == FM_COPP)
audio->fm_source = 1;
else
audio->source = (0x1 << evt_payload->routing_id);
if (audio->source & 0x1)
audio->fm_mask = 0x1;
else if (audio->source & 0x2)
audio->fm_mask = 0x3;
else
audio->fm_mask = 0x0;
if (!audio->enabled
|| !audio->fm_mask
|| !audio->fm_source)
break;
else {
afe_config_fm_codec(FM_ENABLE, audio->fm_mask);
audio->running = 1;
}
break;
case AUDDEV_EVT_DEV_RLS:
MM_DBG(":AUDDEV_EVT_DEV_RLS\n");
if (evt_payload->routing_id == FM_COPP)
audio->fm_source = 0;
else
audio->source &= ~(0x1 << evt_payload->routing_id);
if (audio->source & 0x1)
audio->fm_mask = 0x1;
else if (audio->source & 0x2)
audio->fm_mask = 0x3;
else
audio->fm_mask = 0x0;
if (audio->running
&& (!audio->fm_mask || !audio->fm_source)) {
afe_config_fm_codec(FM_DISABLE, audio->fm_mask);
audio->running = 0;
}
break;
case AUDDEV_EVT_STREAM_VOL_CHG:
MM_DBG(":AUDDEV_EVT_STREAM_VOL_CHG, stream vol \n");
audio->volume = evt_payload->session_vol;
afe_config_fm_volume(audio->volume);
break;
case AUDDEV_EVT_DEVICE_INFO:{
struct acdb_get_block get_block;
int rc = 0;
MM_DBG(":AUDDEV_EVT_DEVICE_INFO\n");
MM_DBG("sample_rate = %d\n", devinfo->sample_rate);
MM_DBG("acdb_id = %d\n", devinfo->acdb_id);
/* Applucable only for icodec rx and aux codec rx path
and fm stream routed to it */
if (((devinfo->dev_id == 0x00) || (devinfo->dev_id == 0x01)) &&
(devinfo->sessions && (1 << audio->dec_id))) {
/* Query ACDB driver for calib gain, only if difference
in device */
if ((audio->fm_calibration_rx[devinfo->dev_id].
dev_details.acdb_id != devinfo->acdb_id) ||
(audio->fm_calibration_rx[devinfo->dev_id].
dev_details.sample_rate !=
devinfo->sample_rate)) {
audio->fm_calibration_rx[devinfo->dev_id].
dev_details.dev_id = devinfo->dev_id;
audio->fm_calibration_rx[devinfo->dev_id].
dev_details.sample_rate =
devinfo->sample_rate;
audio->fm_calibration_rx[devinfo->dev_id].
dev_details.dev_type =
devinfo->dev_type;
audio->fm_calibration_rx[devinfo->dev_id].
dev_details.sessions =
devinfo->sessions;
/* Query ACDB driver for calibration gain */
get_block.acdb_id = devinfo->acdb_id;
get_block.sample_rate_id = devinfo->sample_rate;
get_block.interface_id =
IID_AUDIO_CALIBRATION_GAIN_RX;
get_block.algorithm_block_id =
ABID_AUDIO_CALIBRATION_GAIN_RX;
get_block.total_bytes =
sizeof(struct acdb_calib_gain_rx);
get_block.buf_ptr = (u32 *)
&audio->fm_calibration_rx[devinfo->dev_id].
calib_rx;
rc = acdb_get_calibration_data(&get_block);
if (rc < 0) {
MM_ERR("Unable to get calibration"\
"gain\n");
/* Set to unity incase of error */
audio->\
fm_calibration_rx[devinfo->dev_id].
calib_rx.audppcalgain = 0x2000;
} else
MM_DBG("calibration gain = 0x%8x\n",
*(get_block.buf_ptr));
}
if (audio->running) {
afe_config_fm_calibration_gain(
audio->fm_calibration_rx[devinfo->dev_id].
device_id,
audio->fm_calibration_rx[devinfo->dev_id].
calib_rx.audppcalgain);
}
}
break;
}
default:
MM_DBG(":ERROR:wrong event\n");
break;
}
}
/* must be called with audio->lock held */
static int audio_disable(struct audio *audio)
{
MM_DBG("\n"); /* Macro prints the file name and function */
return afe_config_fm_codec(FM_DISABLE, audio->source);
}
static long audio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct audio *audio = file->private_data;
int rc = -EINVAL;
MM_DBG("cmd = %d\n", cmd);
mutex_lock(&audio->lock);
switch (cmd) {
case AUDIO_START:
MM_DBG("AUDIO_START\n");
rc = audio_enable(audio);
break;
case AUDIO_STOP:
MM_DBG("AUDIO_STOP\n");
rc = audio_disable(audio);
audio->running = 0;
audio->enabled = 0;
break;
case AUDIO_GET_SESSION_ID:
if (copy_to_user((void *) arg, &audio->dec_id,
sizeof(unsigned short)))
rc = -EFAULT;
else
rc = 0;
break;
default:
rc = -EINVAL;
}
mutex_unlock(&audio->lock);
return rc;
}
static int audio_release(struct inode *inode, struct file *file)
{
struct audio *audio = file->private_data;
MM_DBG("audio instance 0x%08x freeing\n", (int)audio);
mutex_lock(&audio->lock);
auddev_unregister_evt_listner(AUDDEV_CLNT_DEC, audio->dec_id);
audio_disable(audio);
audio->running = 0;
audio->enabled = 0;
audio->opened = 0;
mutex_unlock(&audio->lock);
return 0;
}
static int audio_open(struct inode *inode, struct file *file)
{
struct audio *audio = &fm_audio;
int rc = 0;
if (audio->opened)
return -EPERM;
/* Allocate the decoder */
audio->dec_id = SESSION_ID_FM;
audio->running = 0;
audio->fm_source = 0;
audio->fm_mask = 0;
/* Initialize the calibration gain structure */
audio->fm_calibration_rx[0].device_id = AFE_HW_PATH_CODEC_RX;
audio->fm_calibration_rx[1].device_id = AFE_HW_PATH_AUXPCM_RX;
audio->fm_calibration_rx[0].calib_rx.audppcalgain = 0x2000;
audio->fm_calibration_rx[1].calib_rx.audppcalgain = 0x2000;
audio->fm_calibration_rx[0].dev_details.acdb_id = PSEUDO_ACDB_ID;
audio->fm_calibration_rx[1].dev_details.acdb_id = PSEUDO_ACDB_ID;
audio->device_events = AUDDEV_EVT_DEV_RDY
|AUDDEV_EVT_DEV_RLS|
AUDDEV_EVT_STREAM_VOL_CHG|
AUDDEV_EVT_DEVICE_INFO;
rc = auddev_register_evt_listner(audio->device_events,
AUDDEV_CLNT_DEC,
audio->dec_id,
fm_listner,
(void *)audio);
if (rc) {
MM_ERR("%s: failed to register listnet\n", __func__);
goto event_err;
}
audio->opened = 1;
file->private_data = audio;
event_err:
return rc;
}
static const struct file_operations audio_fm_fops = {
.owner = THIS_MODULE,
.open = audio_open,
.release = audio_release,
.unlocked_ioctl = audio_ioctl,
};
struct miscdevice audio_fm_misc = {
.minor = MISC_DYNAMIC_MINOR,
.name = "msm_fm",
.fops = &audio_fm_fops,
};
static int __init audio_init(void)
{
struct audio *audio = &fm_audio;
mutex_init(&audio->lock);
return misc_register(&audio_fm_misc);
}
device_initcall(audio_init);
MODULE_DESCRIPTION("MSM FM driver");
MODULE_LICENSE("GPL v2");