android_kernel_samsung_msm8976/sound/soc/codecs/wcdcal-hwdep.c
Venkata Narendra Kumar Gutta 1bdcfef657 ASoC: wcd9335: Add support to enable vbat feature
Add support to enable vbat monitor feature on tasha codec. Vbat module
monitors the battery voltage and updates the gain on rx path if battery
volatage falls below certain threshold value.
This module can prevent brownout scenarios on the mobile devices when
the loads are heavy on the battery and it can also prolongs battery life.

Change-Id: I66bacf3b861618fc44f50a8e22ca3f2f0fc7763b
Signed-off-by: Venkata Narendra Kumar Gutta <vgutta@codeaurora.org>
2015-08-14 06:25:40 -07:00

223 lines
6.2 KiB
C

/*
* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only 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.
*
*/
#include <linux/slab.h>
#include <linux/ioctl.h>
#include <linux/bitops.h>
#include <sound/hwdep.h>
#include <sound/msmcal-hwdep.h>
#include <sound/soc.h>
#include "wcdcal-hwdep.h"
const int cal_size_info[WCD9XXX_MAX_CAL] = {
[WCD9XXX_ANC_CAL] = 16384,
[WCD9XXX_MBHC_CAL] = 4096,
[WCD9XXX_MAD_CAL] = 4096,
[WCD9XXX_VBAT_CAL] = 72,
};
const char *cal_name_info[WCD9XXX_MAX_CAL] = {
[WCD9XXX_ANC_CAL] = "anc",
[WCD9XXX_MBHC_CAL] = "mbhc",
[WCD9XXX_MAD_CAL] = "mad",
[WCD9XXX_VBAT_CAL] = "vbat",
};
struct firmware_cal *wcdcal_get_fw_cal(struct fw_info *fw_data,
enum wcd_cal_type type)
{
if (!fw_data) {
pr_err("%s: fw_data is NULL\n", __func__);
return NULL;
}
if (type >= WCD9XXX_MAX_CAL ||
type < WCD9XXX_MIN_CAL) {
pr_err("%s: wrong cal type sent %d\n", __func__, type);
return NULL;
}
mutex_lock(&fw_data->lock);
if (!test_bit(WCDCAL_RECIEVED,
&fw_data->wcdcal_state[type])) {
pr_err("%s: cal not sent by userspace %d\n",
__func__, type);
mutex_unlock(&fw_data->lock);
return NULL;
}
mutex_unlock(&fw_data->lock);
return fw_data->fw[type];
}
EXPORT_SYMBOL(wcdcal_get_fw_cal);
static int wcdcal_hwdep_ioctl_shared(struct snd_hwdep *hw,
struct wcdcal_ioctl_buffer fw_user)
{
struct fw_info *fw_data = hw->private_data;
struct firmware_cal **fw = fw_data->fw;
void *data;
if (!test_bit(fw_user.cal_type, fw_data->cal_bit)) {
pr_err("%s: codec didn't set this %d!!\n",
__func__, fw_user.cal_type);
return -EFAULT;
}
if (fw_user.cal_type >= WCD9XXX_MAX_CAL ||
fw_user.cal_type < WCD9XXX_MIN_CAL) {
pr_err("%s: wrong cal type sent %d\n",
__func__, fw_user.cal_type);
return -EFAULT;
}
if (fw_user.size > cal_size_info[fw_user.cal_type] ||
fw_user.size <= 0) {
pr_err("%s: incorrect firmware size %d for %s\n",
__func__, fw_user.size,
cal_name_info[fw_user.cal_type]);
return -EFAULT;
}
data = fw[fw_user.cal_type]->data;
if (copy_from_user(data, fw_user.buffer, fw_user.size))
return -EFAULT;
fw[fw_user.cal_type]->size = fw_user.size;
mutex_lock(&fw_data->lock);
set_bit(WCDCAL_RECIEVED, &fw_data->wcdcal_state[fw_user.cal_type]);
mutex_unlock(&fw_data->lock);
return 0;
}
#ifdef CONFIG_COMPAT
struct wcdcal_ioctl_buffer32 {
u32 size;
compat_uptr_t buffer;
enum wcd_cal_type cal_type;
};
enum {
SNDRV_CTL_IOCTL_HWDEP_CAL_TYPE32 =
_IOW('U', 0x1, struct wcdcal_ioctl_buffer32),
};
static int wcdcal_hwdep_ioctl_compat(struct snd_hwdep *hw, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct wcdcal_ioctl_buffer __user *argp = (void __user *)arg;
struct wcdcal_ioctl_buffer32 fw_user32;
struct wcdcal_ioctl_buffer fw_user_compat;
if (cmd != SNDRV_CTL_IOCTL_HWDEP_CAL_TYPE32) {
pr_err("%s: wrong ioctl command sent %u!\n", __func__, cmd);
return -ENOIOCTLCMD;
}
if (copy_from_user(&fw_user32, argp, sizeof(fw_user32))) {
pr_err("%s: failed to copy\n", __func__);
return -EFAULT;
}
fw_user_compat.size = fw_user32.size;
fw_user_compat.buffer = compat_ptr(fw_user32.buffer);
fw_user_compat.cal_type = fw_user32.cal_type;
return wcdcal_hwdep_ioctl_shared(hw, fw_user_compat);
}
#else
#define wcdcal_hwdep_ioctl_compat NULL
#endif
static int wcdcal_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct wcdcal_ioctl_buffer __user *argp = (void __user *)arg;
struct wcdcal_ioctl_buffer fw_user;
if (cmd != SNDRV_CTL_IOCTL_HWDEP_CAL_TYPE) {
pr_err("%s: wrong ioctl command sent %d!\n", __func__, cmd);
return -ENOIOCTLCMD;
}
if (copy_from_user(&fw_user, argp, sizeof(fw_user))) {
pr_err("%s: failed to copy\n", __func__);
return -EFAULT;
}
return wcdcal_hwdep_ioctl_shared(hw, fw_user);
}
static int wcdcal_hwdep_release(struct snd_hwdep *hw, struct file *file)
{
struct fw_info *fw_data = hw->private_data;
mutex_lock(&fw_data->lock);
/* clear all the calibrations */
memset(fw_data->wcdcal_state, 0,
sizeof(fw_data->wcdcal_state));
mutex_unlock(&fw_data->lock);
return 0;
}
int wcd_cal_create_hwdep(void *data, int node, struct snd_soc_codec *codec)
{
char hwname[40];
struct snd_hwdep *hwdep;
struct firmware_cal **fw;
struct fw_info *fw_data = data;
int err, cal_bit;
if (!fw_data || !codec) {
pr_err("%s: wrong arguments passed\n", __func__);
return -EINVAL;
}
fw = fw_data->fw;
snprintf(hwname, strlen("Codec %s"), "Codec %s", codec->name);
err = snd_hwdep_new(codec->card->snd_card, hwname, node, &hwdep);
if (err < 0) {
dev_err(codec->dev, "%s: new hwdep failed %d\n",
__func__, err);
return err;
}
snprintf(hwdep->name, strlen("Codec %s"), "Codec %s", codec->name);
hwdep->iface = SNDRV_HWDEP_IFACE_AUDIO_CODEC;
hwdep->private_data = fw_data;
hwdep->ops.ioctl_compat = wcdcal_hwdep_ioctl_compat;
hwdep->ops.ioctl = wcdcal_hwdep_ioctl;
hwdep->ops.release = wcdcal_hwdep_release;
mutex_init(&fw_data->lock);
for_each_set_bit(cal_bit, fw_data->cal_bit, WCD9XXX_MAX_CAL) {
set_bit(WCDCAL_UNINITIALISED,
&fw_data->wcdcal_state[cal_bit]);
fw[cal_bit] = kzalloc(sizeof *(fw[cal_bit]), GFP_KERNEL);
if (!fw[cal_bit]) {
dev_err(codec->dev, "%s: no memory for %s cal\n",
__func__, cal_name_info[cal_bit]);
goto end;
}
}
for_each_set_bit(cal_bit, fw_data->cal_bit, WCD9XXX_MAX_CAL) {
fw[cal_bit]->data = kzalloc(cal_size_info[cal_bit],
GFP_KERNEL);
if (!fw[cal_bit]->data) {
dev_err(codec->dev, "%s: no memory for %s cal data\n",
__func__, cal_name_info[cal_bit]);
goto exit;
}
set_bit(WCDCAL_INITIALISED,
&fw_data->wcdcal_state[cal_bit]);
}
return 0;
exit:
for_each_set_bit(cal_bit, fw_data->cal_bit, WCD9XXX_MAX_CAL) {
kfree(fw[cal_bit]->data);
fw[cal_bit]->data = NULL;
}
end:
for_each_set_bit(cal_bit, fw_data->cal_bit, WCD9XXX_MAX_CAL) {
kfree(fw[cal_bit]);
fw[cal_bit] = NULL;
}
return -ENOMEM;
}
EXPORT_SYMBOL(wcd_cal_create_hwdep);