static int es705_uart_boot_setup(struct es705_priv *es705)
{
u8 sbl_sync_cmd = ES705_SBL_SYNC_CMD;
u8 sbl_boot_cmd = ES705_SBL_BOOT_CMD;
u32 rspn = sbl_sync_cmd;
const int match = 1;
int rc;
/* Detect BAUD RATE send SBL SYNC BYTE 0x00 */
dev_dbg(es705->dev, "%s(): write ES705_SBL_SYNC_CMD = 0x%02x\n",
__func__, sbl_sync_cmd);
rc = es705_uart_write_then_read(es705, &sbl_sync_cmd, 1,
&rspn, match);
if (rc < 0) {
dev_err(es705->dev, "%s(): UART baud rate detection fail\n",
__func__);
goto es705_bootup_failed;
}
dev_dbg(es705->dev, "%s(): sbl sync ack = 0x%02x\n", __func__, rspn);
es705->uart_fw_download_rate = 3;
rc = es705_set_uart_baud_rate(es705);
if (rc < 0) {
dev_err(es705->dev, "%s(): uart baud rate set error\n",
__func__);
goto es705_bootup_failed;
}
es705_set_tty_baud_rate(es705->uart_fw_download_rate);
/* SBL SYNC BYTE 0x00 */
dev_dbg(es705->dev, "%s(): write ES705_SBL_SYNC_CMD = 0x%02x\n",
__func__, sbl_sync_cmd);
rc = es705_uart_write_then_read(es705, &sbl_sync_cmd, 1,
&rspn, match);
if (rc < 0) {
dev_err(es705->dev, "%s(): UART FW Download SBL SYNC fail\n",
__func__);
goto es705_bootup_failed;
}
dev_dbg(es705->dev, "%s(): sbl sync ack = 0x%02x\n", __func__, rspn);
/* SBL BOOT BYTE 0x01 */
dev_dbg(es705->dev, "%s(): write ES705_SBL_BOOT_CMD = 0x%02x\n",
__func__, sbl_boot_cmd);
rspn = ES705_SBL_BOOT_ACK;
rc = es705_uart_write_then_read(es705, &sbl_boot_cmd, 1,
&rspn, match);
if (rc < 0) {
dev_err(es705->dev, "%s(): UART FW Download BOOT CMD fail\n",
__func__);
goto es705_bootup_failed;
}
dev_dbg(es705->dev, "%s(): sbl boot ack = 0x%02x\n", __func__, rspn);
es705_bootup_failed:
return rc;
}
int es705_uart_fw_download(struct es705_priv *es705, int fw_type)
{
int rc;
dev_info(es705_priv.dev, "%s(): ********* START %s FW Download\n",
__func__, fw_type == VOICESENSE ? "VS" : "Standard");
rc = es705_uart_open(es705);
if (rc) {
dev_err(es705->dev, "%s(): uart open error\n",
__func__);
goto uart_open_error;
}
es705_set_tty_baud_rate(UART_DOWNLOAD_INITIAL_SYNC_BAUD_RATE_INDEX);
rc = es705_uart_boot_setup(es705);
if (rc < 0) {
dev_err(es705->dev, "%s(): uart boot setup error\n",
__func__);
goto uart_download_error;
}
if (fw_type == VOICESENSE)
rc = es705_uart_write(es705, (char *)es705->vs->data,
es705->vs->size);
else
rc = es705_uart_write(es705, (char *)es705->standard->data,
es705->standard->size);
if (rc < 0) {
dev_err(es705->dev, "%s(): uart %s image write fail\n",
__func__, fw_type == VOICESENSE ? "vs" : "standard");
rc = -EIO;
goto uart_download_error;
}
dev_info(es705->dev, "%s(): %s fw download done\n",
__func__, fw_type == VOICESENSE ? "vs" : "standard");
rc = es705_uart_boot_finish(es705);
if (rc < 0)
dev_err(es705->dev, "%s(): uart boot finish error\n",
__func__);
uart_download_error:
es705_uart_close(es705);
uart_open_error:
dev_info(es705_priv.dev, "%s(): ********* END %s FW Download\n",
__func__, fw_type == VOICESENSE ? "VS" : "Standard");
return rc;
}
int es705_uart_open(struct es705_priv *es705)
{
long err = 0;
struct file *fp = NULL;
unsigned long timeout = jiffies + msecs_to_jiffies(250);
int attempt = 0;
dev_dbg(es705->dev, "%s(): start open tty\n",
__func__);
if (es705->uart_state == UART_OPEN)
es705_uart_close(es705);
/* SAMSUNG - uart_gpio control */
if (es705->pdata->uart_gpio != -1)
gpio_set_value(es705->pdata->uart_gpio, 1);
/* try to probe tty node every 50 ms for 250 ms */
do {
if (attempt > 0)
msleep(50);
dev_dbg(es705->dev,
"%s(): probing for tty on %s (attempt %d)\n",
__func__, UART_TTY_DEVICE_NODE, ++attempt);
fp = filp_open(UART_TTY_DEVICE_NODE,
O_RDWR | O_NONBLOCK | O_NOCTTY,
0);
err = PTR_ERR(fp);
} while (time_before(jiffies, timeout) && err == -ENOENT);
if (IS_ERR_OR_NULL(fp)) {
dev_err(es705->dev,
"%s(): UART device node open failed\n", __func__);
return -ENODEV;
}
/* device node found */
dev_dbg(es705->dev, "%s(): successfully opened tty\n",
__func__);
/* set uart_dev members */
es705_priv.uart_dev.file = fp;
es705_priv.uart_dev.tty =
((struct tty_file_private *)fp->private_data)->tty;
/* set baudrate to FW baud (common case) */
es705_set_tty_baud_rate(es705->uart_fw_download_rate);
es705->uart_state = UART_OPEN;
return 0;
}
