On 27. 11. 22, 14:24, Jisheng Zhang wrote:
+static void bflb_uart_tx_chars(struct uart_port *port)
Again:
Are you unable to use the TX helper? If so:
* why?
* use uart_advance_xmit() at least.
+{
+ struct circ_buf *xmit = &port->state->xmit;
+ unsigned int count;
+
+ if (port->x_char) {
+ /* Send special char - probably flow control */
+ wrl(port, UART_FIFO_WDATA, port->x_char);
+ port->x_char = 0;
+ port->icount.tx++;
+ return;
+ }
+
+ if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
+ bflb_uart_stop_tx(port);
+ return;
+ }
+
+ count = BFLB_UART_TX_FIFO_TH;
+ do {
+ wrl(port, UART_FIFO_WDATA, xmit->buf[xmit->tail]);
+ xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
+ port->icount.tx++;
+ if (uart_circ_empty(xmit))
+ break;
+ } while (--count > 0);
+
+ if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+ uart_write_wakeup(port);
+
+ if (uart_circ_empty(xmit))
+ bflb_uart_stop_tx(port);
+}
--
js
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