static ssize_t sec_nfc_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
struct sec_nfc_info *info = container_of(file->private_data,
struct sec_nfc_info, miscdev);
int ret = 0;
dev_err(info->dev, "%s: info: %p, count %zu\n", __func__,
info, count);
mutex_lock(&info->mutex);
if (info->state == SEC_NFC_ST_OFF) {
dev_err(info->dev, "sec_nfc is not enabled\n");
ret = -ENODEV;
goto out;
}
if (count > info->buflen)
count = info->buflen;
if (count < SEC_NFC_MSG_MIN_SIZE || count > SEC_NFC_MSG_MAX_SIZE) {
dev_err(info->dev, "user required wrong size\n");
ret = -EINVAL;
goto out;
}
if (copy_from_user(info->buf, buf, count)) {
dev_err(info->dev, "copy failed from user\n");
ret = -EFAULT;
goto out;
}
// usleep_range(6000, 10000);
usleep_range(600, 1000);
ret = i2c_master_send(info->i2c_dev, info->buf, count);
if (ret == -EREMOTEIO) {
ret = sec_nfc_reset(info);
goto out;
}
if (ret != count) {
dev_err(info->dev, "send failed: return: %d count: %d\n",
ret, count);
ret = -EREMOTEIO;
}
out:
mutex_unlock(&info->mutex);
return ret;
}
static ssize_t sec_nfc_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct sec_nfc_info *info = container_of(file->private_data,
struct sec_nfc_info, miscdev);
enum sec_nfc_irq irq;
int ret = 0;
dev_dbg(info->dev, "%s: info: %p, count: %zu\n", __func__,
info, count);
mutex_lock(&info->mutex);
if (info->state == SEC_NFC_ST_OFF) {
dev_err(info->dev, "sec_nfc is not enabled\n");
ret = -ENODEV;
goto out;
}
mutex_lock(&info->read_mutex);
irq = info->read_irq;
mutex_unlock(&info->read_mutex);
if (irq == SEC_NFC_NONE) {
if (file->f_flags & O_NONBLOCK) {
dev_err(info->dev, "it is nonblock\n");
ret = -EAGAIN;
goto out;
}
}
dev_err(info->dev, "LWK irq %d\n", irq);
/* i2c recv */
if (count > info->buflen)
count = info->buflen;
if (count < SEC_NFC_MSG_MIN_SIZE || count > SEC_NFC_MSG_MAX_SIZE) {
dev_err(info->dev, "user required wrong size\n");
ret = -EINVAL;
goto out;
}
mutex_lock(&info->read_mutex);
ret = i2c_master_recv(info->i2c_dev, info->buf, count);
dev_err(info->dev, "recv size : %d\n", ret);
if (ret == -EREMOTEIO) {
ret = sec_nfc_reset(info);
goto read_error;
} else if (ret != count) {
dev_err(info->dev, "read failed: return: %d count: %d\n",
ret, count);
//ret = -EREMOTEIO;
goto read_error;
}
info->read_irq = SEC_NFC_NONE;
mutex_unlock(&info->read_mutex);
if (copy_to_user(buf, info->buf, ret)) {
dev_err(info->dev, "copy failed to user\n");
ret = -EFAULT;
}
goto out;
read_error:
info->read_irq = SEC_NFC_NONE;
mutex_unlock(&info->read_mutex);
out:
mutex_unlock(&info->mutex);
return ret;
}
static ssize_t sec_nfc_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct sec_nfc_info *info = container_of(file->private_data,
struct sec_nfc_info, miscdev);
enum sec_nfc_irq irq;
int ret = 0;
/* dev_dbg(info->dev, "%s: info: %p, count: %zu\n",
__func__, info, count);
*/
#if LOG_OUT
pr_info("[NFC] %s: info: %p, count: %zu\n", __func__, info, count);
#endif
mutex_lock(&info->mutex);
if (info->state == SEC_NFC_ST_OFF) {
/* dev_err(info->dev, "sec_nfc is not enabled\n"); */
pr_err("[NFC] sec_nfc is not enabled\n");
ret = -ENODEV;
goto out;
}
mutex_lock(&info->read_mutex);
irq = info->read_irq;
mutex_unlock(&info->read_mutex);
if (irq == SEC_NFC_NONE) {
if (file->f_flags & O_NONBLOCK) {
/* dev_err(info->dev, "it is nonblock\n"); */
pr_err("[NFC] it is nonblock\n");
ret = -EAGAIN;
goto out;
}
if (info->state == SEC_NFC_ST_FIRM) {
#if LOG_OUT
pr_info("[NFC] READ : FIRMWARE DOWNLOAD MODE");
#endif
if (wait_event_interruptible(info->read_wait,
(info->read_irq == SEC_NFC_INT))) {
ret = -ERESTARTSYS;
goto out;
}
}
}
/* i2c recv */
if (count > info->buflen)
count = info->buflen;
if (count < SEC_NFC_MSG_MIN_SIZE || count > SEC_NFC_MSG_MAX_SIZE) {
/* dev_err(info->dev, "user required wrong size\n"); */
pr_err("[NFC] user required wrong size\n");
ret = -EINVAL;
goto out;
}
mutex_lock(&info->read_mutex);
ret = i2c_master_recv(info->i2c_dev, info->buf, count);
/* dev_dbg(info->dev, "recv size : %d\n", ret); */
#if LOG_OUT
pr_info("[NFC] recv size : %d\n", ret);
#endif
if (ret == -EREMOTEIO) {
ret = sec_nfc_reset(info);
goto read_error;
} else if (ret != count) {
pr_err("[NFC] read failed: return: %d count: %d\n",
ret, count);
/* ret = -EREMOTEIO; */
goto read_error;
}
if (info->state == SEC_NFC_ST_FIRM && ret == SEC_NFC_MSG_FW_PACK_HDR)
/* Firmware download read twice by one interrupt */
info->read_irq = SEC_NFC_INT;
else
info->read_irq = SEC_NFC_NONE;
mutex_unlock(&info->read_mutex);
if (copy_to_user(buf, info->buf, ret)) {
/* dev_err(info->dev, "copy failed to user\n"); */
pr_err("[NFC] copy failed to user\n");
ret = -EFAULT;
}
goto out;
read_error:
info->read_irq = SEC_NFC_NONE;
mutex_unlock(&info->read_mutex);
out:
mutex_unlock(&info->mutex);
#if LOG_OUT
pr_info("[NFC] read function finish\n");
#endif
return ret;
}
