static int sec_nfc_open(struct inode *inode, struct file *file)
{
struct sec_nfc_info *info = container_of(file->private_data,
struct sec_nfc_info, miscdev);
int ret = 0;
uid_t uid;
// Security
dev_dbg(info->dev, "%s: info : %p" , __func__, info);
// Check process
uid = __task_cred(current)->uid;
if (g_secnfc_uid != uid) {
dev_err(info->dev, "%s: Un-authorized process. No access to device\n", __func__);
return -EPERM;
}
// End of Security
mutex_lock(&info->mutex);
if (info->state != SEC_NFC_ST_OFF) {
dev_err(info->dev, "sec_nfc is busy\n");
ret = -EBUSY;
goto out;
}
#ifdef CONFIG_SEC_NFC_I2C
mutex_lock(&info->read_mutex);
info->read_irq = SEC_NFC_NONE;
mutex_unlock(&info->read_mutex);
ret = sec_nfc_set_state(info, SEC_NFC_ST_NORM);
#endif
out:
mutex_unlock(&info->mutex);
return ret;
}
static int sec_nfc_open(struct inode *inode, struct file *file)
{
struct sec_nfc_info *info = container_of(file->private_data,
struct sec_nfc_info, miscdev);
int ret = 0;
dev_dbg(info->dev, "%s: info : %p" , __func__, info);
mutex_lock(&info->mutex);
if (info->state != SEC_NFC_ST_OFF) {
dev_err(info->dev, "sec_nfc is busy\n");
ret = -EBUSY;
goto out;
}
#ifdef CONFIG_SEC_NFC_I2C
mutex_lock(&info->read_mutex);
info->read_irq = SEC_NFC_NONE;
mutex_unlock(&info->read_mutex);
#endif
ret = sec_nfc_set_state(info, SEC_NFC_ST_NORM);
out:
mutex_unlock(&info->mutex);
return ret;
}
static int sec_nfc_reset(struct sec_nfc_info *info)
{
dev_err(info->dev, "i2c failed. return resatrt to M/W\n");
sec_nfc_set_state(info, SEC_NFC_ST_NORM);
return -ERESTART;
}
static int sec_nfc_close(struct inode *inode, struct file *file)
{
struct sec_nfc_info *info = container_of(file->private_data,
struct sec_nfc_info, miscdev);
dev_dbg(info->dev, "%s: info : %p" , __func__, info);
mutex_lock(&info->mutex);
sec_nfc_set_state(info, SEC_NFC_ST_OFF);
mutex_unlock(&info->mutex);
return 0;
}
static long sec_nfc_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct sec_nfc_info *info = container_of(file->private_data,
struct sec_nfc_info, miscdev);
unsigned int mode = (unsigned int)arg;
int ret = 0;
dev_dbg(info->dev, "%s: info: %p, cmd: 0x%x\n",
__func__, info, cmd);
mutex_lock(&info->mutex);
switch (cmd) {
case SEC_NFC_SET_MODE:
dev_dbg(info->dev, "%s: SEC_NFC_SET_MODE\n", __func__);
if (info->state == mode)
break;
if (mode >= SEC_NFC_ST_COUNT) {
dev_err(info->dev, "wrong state (%d)\n", mode);
ret = -EFAULT;
break;
}
ret = sec_nfc_set_state(info, mode);
if (ret < 0) {
dev_err(info->dev, "enable failed\n");
break;
}
break;
default:
dev_err(info->dev, "Unknow ioctl 0x%x\n", cmd);
ret = -ENOIOCTLCMD;
break;
}
mutex_unlock(&info->mutex);
return ret;
}
static long sec_nfc_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct sec_nfc_info *info = container_of(file->private_data,
struct sec_nfc_info, miscdev);
unsigned int mode = (unsigned int)arg;
int ret = 0;
int firm;
dev_dbg(info->dev, "%s: info: %p, cmd: 0x%x\n",
__func__, info, cmd);
mutex_lock(&info->mutex);
switch (cmd) {
case SEC_NFC_SET_MODE:
dev_dbg(info->dev, "%s: SEC_NFC_SET_MODE\n", __func__);
if (info->state == mode)
break;
if (mode >= SEC_NFC_ST_COUNT) {
dev_err(info->dev, "wrong state (%d)\n", mode);
ret = -EFAULT;
break;
}
ret = sec_nfc_set_state(info, mode);
if (ret < 0) {
dev_err(info->dev, "enable failed\n");
break;
}
break;
case SEC_NFC_SET_UART_STATE:
if (mode >= SEC_NFC_ST_COUNT) {
dev_err(info->dev, "wrong state (%d)\n", mode);
ret = -EFAULT;
break;
}
firm = gpio_get_value(info->pdata->firm);
pr_info("%s: [NFC] Firm pin = %d\n", __func__, firm);
if(mode == SEC_NFC_ST_UART_ON)
gpio_set_value(info->pdata->firm, STATE_FIRM_HIGH);
else if(mode == SEC_NFC_ST_UART_OFF)
gpio_set_value(info->pdata->firm, STATE_FIRM_LOW);
else
ret = -EFAULT;
firm = gpio_get_value(info->pdata->firm);
pr_info("%s: [NFC] Mode = %d, Firm pin = %d\n", __func__, mode, firm);
break;
default:
dev_err(info->dev, "Unknow ioctl 0x%x\n", cmd);
ret = -ENOIOCTLCMD;
break;
}
mutex_unlock(&info->mutex);
return ret;
}
