89 static void mtk8250_rx_dma(struct uart_8250_port *up);
93 	struct uart_8250_port *up = param;  in mtk8250_dma_rx_complete()  local
94 	struct uart_8250_dma *dma = up->dma;  in mtk8250_dma_rx_complete()
95 	struct mtk8250_data *data = up->port.private_data;  in mtk8250_dma_rx_complete()
96 	struct tty_port *tty_port = &up->port.state->port;  in mtk8250_dma_rx_complete()
105 	spin_lock_irqsave(&up->port.lock, flags);  in mtk8250_dma_rx_complete()
125 	up->port.icount.rx += copied;  in mtk8250_dma_rx_complete()
129 	mtk8250_rx_dma(up);  in mtk8250_dma_rx_complete()
131 	spin_unlock_irqrestore(&up->port.lock, flags);  in mtk8250_dma_rx_complete()
134 static void mtk8250_rx_dma(struct uart_8250_port *up)  in mtk8250_rx_dma()  argument
136 	struct uart_8250_dma *dma = up->dma;  in mtk8250_rx_dma()
148 	desc->callback_param = up;  in mtk8250_rx_dma()
155 static void mtk8250_dma_enable(struct uart_8250_port *up)  in mtk8250_dma_enable()  argument
157 	struct uart_8250_dma *dma = up->dma;  in mtk8250_dma_enable()
158 	struct mtk8250_data *data = up->port.private_data;  in mtk8250_dma_enable()
159 	int lcr = serial_in(up, UART_LCR);  in mtk8250_dma_enable()
170 	serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR |  in mtk8250_dma_enable()
172 	serial_out(up, MTK_UART_DMA_EN,  in mtk8250_dma_enable()
175 	serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);  in mtk8250_dma_enable()
176 	serial_out(up, MTK_UART_EFR, UART_EFR_ECB);  in mtk8250_dma_enable()
177 	serial_out(up, UART_LCR, lcr);  in mtk8250_dma_enable()
186 	mtk8250_rx_dma(up);  in mtk8250_dma_enable()
193 	struct uart_8250_port *up = up_to_u8250p(port);  in mtk8250_startup()  local
198 		up->dma = NULL;  in mtk8250_startup()
200 	if (up->dma) {  in mtk8250_startup()
213 	struct uart_8250_port *up = up_to_u8250p(port);  in mtk8250_shutdown()  local
216 	if (up->dma)  in mtk8250_shutdown()
223 static void mtk8250_disable_intrs(struct uart_8250_port *up, int mask)  in mtk8250_disable_intrs()  argument
226 	lockdep_assert_held_once(&up->port.lock);  in mtk8250_disable_intrs()
228 	serial_out(up, UART_IER, serial_in(up, UART_IER) & (~mask));  in mtk8250_disable_intrs()
231 static void mtk8250_enable_intrs(struct uart_8250_port *up, int mask)  in mtk8250_enable_intrs()  argument
234 	lockdep_assert_held_once(&up->port.lock);  in mtk8250_enable_intrs()
236 	serial_out(up, UART_IER, serial_in(up, UART_IER) | mask);  in mtk8250_enable_intrs()
239 static void mtk8250_set_flow_ctrl(struct uart_8250_port *up, int mode)  in mtk8250_set_flow_ctrl()  argument
241 	struct uart_port *port = &up->port;  in mtk8250_set_flow_ctrl()
242 	int lcr = serial_in(up, UART_LCR);  in mtk8250_set_flow_ctrl()
247 	serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);  in mtk8250_set_flow_ctrl()
248 	serial_out(up, MTK_UART_EFR, UART_EFR_ECB);  in mtk8250_set_flow_ctrl()
249 	serial_out(up, UART_LCR, lcr);  in mtk8250_set_flow_ctrl()
250 	lcr = serial_in(up, UART_LCR);  in mtk8250_set_flow_ctrl()
254 		serial_out(up, MTK_UART_ESCAPE_DAT, MTK_UART_ESCAPE_CHAR);  in mtk8250_set_flow_ctrl()
255 		serial_out(up, MTK_UART_ESCAPE_EN, 0x00);  in mtk8250_set_flow_ctrl()
256 		serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);  in mtk8250_set_flow_ctrl()
257 		serial_out(up, MTK_UART_EFR, serial_in(up, MTK_UART_EFR) &  in mtk8250_set_flow_ctrl()
259 		serial_out(up, UART_LCR, lcr);  in mtk8250_set_flow_ctrl()
260 		mtk8250_disable_intrs(up, MTK_UART_IER_XOFFI |  in mtk8250_set_flow_ctrl()
265 		serial_out(up, MTK_UART_ESCAPE_DAT, MTK_UART_ESCAPE_CHAR);  in mtk8250_set_flow_ctrl()
266 		serial_out(up, MTK_UART_ESCAPE_EN, 0x00);  in mtk8250_set_flow_ctrl()
267 		serial_out(up, UART_MCR, UART_MCR_RTS);  in mtk8250_set_flow_ctrl()
268 		serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);  in mtk8250_set_flow_ctrl()
271 		serial_out(up, MTK_UART_EFR, MTK_UART_EFR_HW_FC |  in mtk8250_set_flow_ctrl()
272 			(serial_in(up, MTK_UART_EFR) &  in mtk8250_set_flow_ctrl()
275 		serial_out(up, UART_LCR, lcr);  in mtk8250_set_flow_ctrl()
276 		mtk8250_disable_intrs(up, MTK_UART_IER_XOFFI);  in mtk8250_set_flow_ctrl()
277 		mtk8250_enable_intrs(up, MTK_UART_IER_CTSI | MTK_UART_IER_RTSI);  in mtk8250_set_flow_ctrl()
281 		serial_out(up, MTK_UART_ESCAPE_DAT, MTK_UART_ESCAPE_CHAR);  in mtk8250_set_flow_ctrl()
282 		serial_out(up, MTK_UART_ESCAPE_EN, 0x01);  in mtk8250_set_flow_ctrl()
283 		serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);  in mtk8250_set_flow_ctrl()
286 		serial_out(up, MTK_UART_EFR, MTK_UART_EFR_XON1_XOFF1 |  in mtk8250_set_flow_ctrl()
287 			(serial_in(up, MTK_UART_EFR) &  in mtk8250_set_flow_ctrl()
290 		serial_out(up, MTK_UART_XON1, START_CHAR(port->state->port.tty));  in mtk8250_set_flow_ctrl()
291 		serial_out(up, MTK_UART_XOFF1, STOP_CHAR(port->state->port.tty));  in mtk8250_set_flow_ctrl()
292 		serial_out(up, UART_LCR, lcr);  in mtk8250_set_flow_ctrl()
293 		mtk8250_disable_intrs(up, MTK_UART_IER_CTSI|MTK_UART_IER_RTSI);  in mtk8250_set_flow_ctrl()
294 		mtk8250_enable_intrs(up, MTK_UART_IER_XOFFI);  in mtk8250_set_flow_ctrl()
311 	struct uart_8250_port *up = up_to_u8250p(port);  in mtk8250_set_termios()  local
317 	if (up->dma) {  in mtk8250_set_termios()
319 			devm_kfree(up->port.dev, up->dma);  in mtk8250_set_termios()
320 			up->dma = NULL;  in mtk8250_set_termios()
322 			mtk8250_dma_enable(up);  in mtk8250_set_termios()
379 	serial_port_out(port, UART_LCR, up->lcr | UART_LCR_DLAB);  in mtk8250_set_termios()
380 	serial_dl_write(up, quot);  in mtk8250_set_termios()
383 	serial_port_out(port, UART_LCR, up->lcr);  in mtk8250_set_termios()
414 	mtk8250_set_flow_ctrl(up, mode);  in mtk8250_set_termios()
417 		up->port.cons->cflag = termios->c_cflag;  in mtk8250_set_termios()
428 	struct uart_8250_port *up = serial8250_get_port(data->line);  in mtk8250_runtime_suspend()  local
432 		(serial_in(up, MTK_UART_DEBUG0));  in mtk8250_runtime_suspend()