diff options
| -rw-r--r-- | drivers/serial/serial_mtk.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/serial/serial_mtk.c b/drivers/serial/serial_mtk.c index bce1be8227..11892a8740 100644 --- a/drivers/serial/serial_mtk.c +++ b/drivers/serial/serial_mtk.c @@ -46,6 +46,22 @@ struct mtk_serial_regs { #define UART_LSR_DR 0x01 /* Data ready */ #define UART_LSR_THRE 0x20 /* Xmit holding register empty */ +#define UART_LSR_TEMT 0x40 /* Xmitter empty */ + +#define UART_MCR_DTR 0x01 /* DTR */ +#define UART_MCR_RTS 0x02 /* RTS */ + +#define UART_FCR_FIFO_EN 0x01 /* Fifo enable */ +#define UART_FCR_RXSR 0x02 /* Receiver soft reset */ +#define UART_FCR_TXSR 0x04 /* Transmitter soft reset */ + +#define UART_MCRVAL (UART_MCR_DTR | \ + UART_MCR_RTS) + +/* Clear & enable FIFOs */ +#define UART_FCRVAL (UART_FCR_FIFO_EN | \ + UART_FCR_RXSR | \ + UART_FCR_TXSR) /* the data is correct if the real baud is within 3%. */ #define BAUD_ALLOW_MAX(baud) ((baud) + (baud) * 3 / 100) @@ -175,6 +191,9 @@ static int mtk_serial_probe(struct udevice *dev) /* Disable interrupt */ writel(0, &priv->regs->ier); + writel(UART_MCRVAL, &priv->regs->mcr); + writel(UART_FCRVAL, &priv->regs->fcr); + return 0; } @@ -248,6 +267,8 @@ static inline void _debug_uart_init(void) priv.clock = CONFIG_DEBUG_UART_CLOCK; writel(0, &priv.regs->ier); + writel(UART_MCRVAL, &priv.regs->mcr); + writel(UART_FCRVAL, &priv.regs->fcr); _mtk_serial_setbrg(&priv, CONFIG_BAUDRATE); } |