pxa.c (14e77332e74603efab8347c89d3cda447c3b97c9) pxa.c (d11cc8c3c4b65e00e01f20a920c5fa412415204a)
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Based on drivers/serial/8250.c by Russell King.
4 *
5 * Author: Nicolas Pitre
6 * Created: Feb 20, 2003
7 * Copyright: (C) 2003 Monta Vista Software, Inc.
8 *

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169 * No more data in FIFO: Re-enable RTO interrupt via IER[RTOIE]
170 */
171 up->ier |= UART_IER_RTOIE;
172 serial_out(up, UART_IER, up->ier);
173}
174
175static void transmit_chars(struct uart_pxa_port *up)
176{
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Based on drivers/serial/8250.c by Russell King.
4 *
5 * Author: Nicolas Pitre
6 * Created: Feb 20, 2003
7 * Copyright: (C) 2003 Monta Vista Software, Inc.
8 *

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169 * No more data in FIFO: Re-enable RTO interrupt via IER[RTOIE]
170 */
171 up->ier |= UART_IER_RTOIE;
172 serial_out(up, UART_IER, up->ier);
173}
174
175static void transmit_chars(struct uart_pxa_port *up)
176{
177 struct circ_buf *xmit = &up->port.state->xmit;
178 int count;
177 u8 ch;
179
178
180 if (up->port.x_char) {
181 serial_out(up, UART_TX, up->port.x_char);
182 up->port.icount.tx++;
183 up->port.x_char = 0;
184 return;
185 }
186 if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
187 serial_pxa_stop_tx(&up->port);
188 return;
189 }
190
191 count = up->port.fifosize / 2;
192 do {
193 serial_out(up, UART_TX, xmit->buf[xmit->tail]);
194 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
195 up->port.icount.tx++;
196 if (uart_circ_empty(xmit))
197 break;
198 } while (--count > 0);
199
200 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
201 uart_write_wakeup(&up->port);
202
203
204 if (uart_circ_empty(xmit))
205 serial_pxa_stop_tx(&up->port);
179 uart_port_tx_limited(&up->port, ch, up->port.fifosize / 2,
180 true,
181 serial_out(up, UART_TX, ch),
182 ({}));
206}
207
208static void serial_pxa_start_tx(struct uart_port *port)
209{
210 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
211
212 if (!(up->ier & UART_IER_THRI)) {
213 up->ier |= UART_IER_THRI;

--- 718 unchanged lines hidden --- 		183}
184
185static void serial_pxa_start_tx(struct uart_port *port)
186{
187 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
188
189 if (!(up->ier & UART_IER_THRI)) {
190 up->ier |= UART_IER_THRI;

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