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/*
* Copyright (c) 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/kernel.h>
#include <linux/platform_device.h>
#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->component.name);
err = snd_hwdep_new(codec->component.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->component.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);
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