serial: sirf: add serial loopback function support (7f60f2fe) · Commits · 戴 / test

drivers/tty/serial/sirfsoc_uart.c

+20 −0

Original line number	Diff line number	Diff line
		@@ -108,6 +108,26 @@ static void sirfsoc_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
		unsigned int val = assert ? SIRFUART_AFC_CTRL_RX_THD : 0x0;
		unsigned int current_val;

		if (mctrl & TIOCM_LOOP) {
		if (sirfport->uart_reg->uart_type == SIRF_REAL_UART)
		wr_regl(port, ureg->sirfsoc_line_ctrl,
		rd_regl(port, ureg->sirfsoc_line_ctrl) \|
		SIRFUART_LOOP_BACK);
		else
		wr_regl(port, ureg->sirfsoc_mode1,
		rd_regl(port, ureg->sirfsoc_mode1) \|
		SIRFSOC_USP_LOOP_BACK_CTRL);
		} else {
		if (sirfport->uart_reg->uart_type == SIRF_REAL_UART)
		wr_regl(port, ureg->sirfsoc_line_ctrl,
		rd_regl(port, ureg->sirfsoc_line_ctrl) &
		~SIRFUART_LOOP_BACK);
		else
		wr_regl(port, ureg->sirfsoc_mode1,
		rd_regl(port, ureg->sirfsoc_mode1) &
		~SIRFSOC_USP_LOOP_BACK_CTRL);
		}

		if (!sirfport->hw_flow_ctrl \|\| !sirfport->ms_enabled)
		return;
		if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {

+1 −1

Original line number	Diff line number	Diff line
		@@ -322,7 +322,7 @@ struct sirfsoc_uart_register sirfsoc_uart = {
		#define SIRFSOC_USP_RX_CLK_DIVISOR_OFFSET 24
		#define SIRFSOC_USP_ASYNC_DIV2_MASK 0x3f
		#define SIRFSOC_USP_ASYNC_DIV2_OFFSET 16

		#define SIRFSOC_USP_LOOP_BACK_CTRL BIT(2)
		/* USP-UART Common */
		#define SIRFSOC_UART_RX_TIMEOUT(br, to) (((br) * (((to) + 999) / 1000)) / 1000)
		#define SIRFUART_RECV_TIMEOUT_VALUE(x) \