64 static void bfin_sir_stop_tx(struct bfin_sir_port *port)  in bfin_sir_stop_tx()  argument
67 	disable_dma(port->tx_dma_channel);  in bfin_sir_stop_tx()
70 	while (!(UART_GET_LSR(port) & THRE)) {  in bfin_sir_stop_tx()
75 	UART_CLEAR_IER(port, ETBEI);  in bfin_sir_stop_tx()
78 static void bfin_sir_enable_tx(struct bfin_sir_port *port)  in bfin_sir_enable_tx()  argument
80 	UART_SET_IER(port, ETBEI);  in bfin_sir_enable_tx()
83 static void bfin_sir_stop_rx(struct bfin_sir_port *port)  in bfin_sir_stop_rx()  argument
85 	UART_CLEAR_IER(port, ERBFI);  in bfin_sir_stop_rx()
88 static void bfin_sir_enable_rx(struct bfin_sir_port *port)  in bfin_sir_enable_rx()  argument
90 	UART_SET_IER(port, ERBFI);  in bfin_sir_enable_rx()
93 static int bfin_sir_set_speed(struct bfin_sir_port *port, int speed)  in bfin_sir_set_speed()  argument
115 		quot = (port->clk + (8 * speed)) / (16 * speed);  in bfin_sir_set_speed()
119 			lsr = UART_GET_LSR(port);  in bfin_sir_set_speed()
128 		val = UART_GET_GCTL(port);  in bfin_sir_set_speed()
130 		UART_PUT_GCTL(port, val);  in bfin_sir_set_speed()
133 		UART_SET_DLAB(port);  in bfin_sir_set_speed()
136 		UART_PUT_DLL(port, quot & 0xFF);  in bfin_sir_set_speed()
137 		UART_PUT_DLH(port, (quot >> 8) & 0xFF);  in bfin_sir_set_speed()
141 		UART_CLEAR_DLAB(port);  in bfin_sir_set_speed()
144 		UART_PUT_LCR(port, lcr);  in bfin_sir_set_speed()
146 		val = UART_GET_GCTL(port);  in bfin_sir_set_speed()
148 		UART_PUT_GCTL(port, val);  in bfin_sir_set_speed()
157 	val = UART_GET_GCTL(port);  in bfin_sir_set_speed()
162 	UART_PUT_GCTL(port, val);  in bfin_sir_set_speed()
169 	struct bfin_sir_port *port = self->sir_port;  in bfin_sir_is_receiving()  local
171 	if (!(UART_GET_IER(port) & ERBFI))  in bfin_sir_is_receiving()
181 	struct bfin_sir_port *port = self->sir_port;  in bfin_sir_tx_chars()  local
185 		UART_PUT_CHAR(port, chr);  in bfin_sir_tx_chars()
192 			bfin_sir_set_speed(port, self->newspeed);  in bfin_sir_tx_chars()
196 		bfin_sir_stop_tx(port);  in bfin_sir_tx_chars()
197 		bfin_sir_enable_rx(port);  in bfin_sir_tx_chars()
206 	struct bfin_sir_port *port = self->sir_port;  in bfin_sir_rx_chars()  local
209 	UART_CLEAR_LSR(port);  in bfin_sir_rx_chars()
210 	ch = UART_GET_CHAR(port);  in bfin_sir_rx_chars()
219 	struct bfin_sir_port *port = self->sir_port;  in bfin_sir_rx_int()  local
222 	while ((UART_GET_LSR(port) & DR))  in bfin_sir_rx_int()
233 	struct bfin_sir_port *port = self->sir_port;  in bfin_sir_tx_int()  local
236 	if (UART_GET_LSR(port) & THRE)  in bfin_sir_tx_int()
248 	struct bfin_sir_port *port = self->sir_port;  in bfin_sir_dma_tx_chars()  local
250 	if (!port->tx_done)  in bfin_sir_dma_tx_chars()
252 	port->tx_done = 0;  in bfin_sir_dma_tx_chars()
257 			bfin_sir_set_speed(port, self->newspeed);  in bfin_sir_dma_tx_chars()
261 		bfin_sir_enable_rx(port);  in bfin_sir_dma_tx_chars()
262 		port->tx_done = 1;  in bfin_sir_dma_tx_chars()
269 	set_dma_config(port->tx_dma_channel,  in bfin_sir_dma_tx_chars()
273 	set_dma_start_addr(port->tx_dma_channel,  in bfin_sir_dma_tx_chars()
275 	set_dma_x_count(port->tx_dma_channel, self->tx_buff.len);  in bfin_sir_dma_tx_chars()
276 	set_dma_x_modify(port->tx_dma_channel, 1);  in bfin_sir_dma_tx_chars()
277 	enable_dma(port->tx_dma_channel);  in bfin_sir_dma_tx_chars()
284 	struct bfin_sir_port *port = self->sir_port;  in bfin_sir_dma_tx_int()  local
287 	if (!(get_dma_curr_irqstat(port->tx_dma_channel) & DMA_RUN)) {  in bfin_sir_dma_tx_int()
288 		clear_dma_irqstat(port->tx_dma_channel);  in bfin_sir_dma_tx_int()
289 		bfin_sir_stop_tx(port);  in bfin_sir_dma_tx_int()
295 			bfin_sir_set_speed(port, self->newspeed);  in bfin_sir_dma_tx_int()
299 		bfin_sir_enable_rx(port);  in bfin_sir_dma_tx_int()
302 		port->tx_done = 1;  in bfin_sir_dma_tx_int()
312 	struct bfin_sir_port *port = self->sir_port;  in bfin_sir_dma_rx_chars()  local
315 	UART_CLEAR_LSR(port);  in bfin_sir_dma_rx_chars()
317 	for (i = port->rx_dma_buf.head; i < port->rx_dma_buf.tail; i++)  in bfin_sir_dma_rx_chars()
318 		async_unwrap_char(dev, &self->stats, &self->rx_buff, port->rx_dma_buf.buf[i]);  in bfin_sir_dma_rx_chars()
324 	struct bfin_sir_port *port = self->sir_port;  in bfin_sir_rx_dma_timeout()  local
329 	x_pos = DMA_SIR_RX_XCNT - get_dma_curr_xcount(port->rx_dma_channel);  in bfin_sir_rx_dma_timeout()
333 	pos = port->rx_dma_nrows * DMA_SIR_RX_XCNT + x_pos;  in bfin_sir_rx_dma_timeout()
335 	if (pos > port->rx_dma_buf.tail) {  in bfin_sir_rx_dma_timeout()
336 		port->rx_dma_buf.tail = pos;  in bfin_sir_rx_dma_timeout()
338 		port->rx_dma_buf.head = port->rx_dma_buf.tail;  in bfin_sir_rx_dma_timeout()
347 	struct bfin_sir_port *port = self->sir_port;  in bfin_sir_dma_rx_int()  local
352 	port->rx_dma_nrows++;  in bfin_sir_dma_rx_int()
353 	port->rx_dma_buf.tail = DMA_SIR_RX_XCNT * port->rx_dma_nrows;  in bfin_sir_dma_rx_int()
355 	if (port->rx_dma_nrows >= DMA_SIR_RX_YCNT) {  in bfin_sir_dma_rx_int()
356 		port->rx_dma_nrows = 0;  in bfin_sir_dma_rx_int()
357 		port->rx_dma_buf.tail = 0;  in bfin_sir_dma_rx_int()
359 	port->rx_dma_buf.head = port->rx_dma_buf.tail;  in bfin_sir_dma_rx_int()
361 	irqstat = get_dma_curr_irqstat(port->rx_dma_channel);  in bfin_sir_dma_rx_int()
362 	clear_dma_irqstat(port->rx_dma_channel);  in bfin_sir_dma_rx_int()
365 	mod_timer(&port->rx_dma_timer, jiffies + DMA_SIR_RX_FLUSH_JIFS);  in bfin_sir_dma_rx_int()
370 static int bfin_sir_startup(struct bfin_sir_port *port, struct net_device *dev)  in bfin_sir_startup()  argument
376 	if (request_dma(port->rx_dma_channel, "BFIN_UART_RX") < 0) {  in bfin_sir_startup()
381 	if (request_dma(port->tx_dma_channel, "BFIN_UART_TX") < 0) {  in bfin_sir_startup()
383 		free_dma(port->rx_dma_channel);  in bfin_sir_startup()
389 	set_dma_callback(port->rx_dma_channel, bfin_sir_dma_rx_int, dev);  in bfin_sir_startup()
390 	set_dma_callback(port->tx_dma_channel, bfin_sir_dma_tx_int, dev);  in bfin_sir_startup()
392 	port->rx_dma_buf.buf = dma_alloc_coherent(NULL, PAGE_SIZE,  in bfin_sir_startup()
394 	port->rx_dma_buf.head = 0;  in bfin_sir_startup()
395 	port->rx_dma_buf.tail = 0;  in bfin_sir_startup()
396 	port->rx_dma_nrows = 0;  in bfin_sir_startup()
398 	set_dma_config(port->rx_dma_channel,  in bfin_sir_startup()
402 	set_dma_x_count(port->rx_dma_channel, DMA_SIR_RX_XCNT);  in bfin_sir_startup()
403 	set_dma_x_modify(port->rx_dma_channel, 1);  in bfin_sir_startup()
404 	set_dma_y_count(port->rx_dma_channel, DMA_SIR_RX_YCNT);  in bfin_sir_startup()
405 	set_dma_y_modify(port->rx_dma_channel, 1);  in bfin_sir_startup()
406 	set_dma_start_addr(port->rx_dma_channel, (unsigned long)port->rx_dma_buf.buf);  in bfin_sir_startup()
407 	enable_dma(port->rx_dma_channel);  in bfin_sir_startup()
409 	port->rx_dma_timer.data = (unsigned long)(dev);  in bfin_sir_startup()
410 	port->rx_dma_timer.function = (void *)bfin_sir_rx_dma_timeout;  in bfin_sir_startup()
414 	if (request_irq(port->irq, bfin_sir_rx_int, 0, "BFIN_SIR_RX", dev)) {  in bfin_sir_startup()
419 	if (request_irq(port->irq+1, bfin_sir_tx_int, 0, "BFIN_SIR_TX", dev)) {  in bfin_sir_startup()
421 		free_irq(port->irq, dev);  in bfin_sir_startup()
429 static void bfin_sir_shutdown(struct bfin_sir_port *port, struct net_device *dev)  in bfin_sir_shutdown()  argument
433 	bfin_sir_stop_rx(port);  in bfin_sir_shutdown()
435 	val = UART_GET_GCTL(port);  in bfin_sir_shutdown()
437 	UART_PUT_GCTL(port, val);  in bfin_sir_shutdown()
440 	disable_dma(port->tx_dma_channel);  in bfin_sir_shutdown()
441 	disable_dma(port->rx_dma_channel);  in bfin_sir_shutdown()
442 	del_timer(&(port->rx_dma_timer));  in bfin_sir_shutdown()
443 	dma_free_coherent(NULL, PAGE_SIZE, port->rx_dma_buf.buf, 0);  in bfin_sir_shutdown()
445 	free_irq(port->irq+1, dev);  in bfin_sir_shutdown()
446 	free_irq(port->irq, dev);  in bfin_sir_shutdown()
448 	free_dma(port->tx_dma_channel);  in bfin_sir_shutdown()
449 	free_dma(port->rx_dma_channel);  in bfin_sir_shutdown()
478 	struct bfin_sir_port *port;  in bfin_sir_resume()  local
486 	port = self->sir_port;  in bfin_sir_resume()
492 		bfin_sir_startup(port, dev);  in bfin_sir_resume()
493 		bfin_sir_set_speed(port, 9600);  in bfin_sir_resume()
494 		bfin_sir_enable_rx(port);  in bfin_sir_resume()
508 	struct bfin_sir_port *port = self->sir_port;  in bfin_sir_send_work()  local
515 	bfin_sir_stop_rx(port);  in bfin_sir_send_work()
521 	val = UART_GET_GCTL(port);  in bfin_sir_send_work()
523 	UART_PUT_GCTL(port, val);  in bfin_sir_send_work()
526 	UART_PUT_GCTL(port, val);  in bfin_sir_send_work()
533 	bfin_sir_enable_tx(port);  in bfin_sir_send_work()
565 	struct bfin_sir_port *port = self->sir_port;  in bfin_sir_ioctl()  local
572 				ret = bfin_sir_set_speed(port, rq->ifr_baudrate);  in bfin_sir_ioctl()
573 				bfin_sir_enable_rx(port);  in bfin_sir_ioctl()
611 	struct bfin_sir_port *port = self->sir_port;  in bfin_sir_open()  local
619 	err = bfin_sir_startup(port, dev);  in bfin_sir_open()
623 	bfin_sir_set_speed(port, 9600);  in bfin_sir_open()
637 	bfin_sir_enable_rx(port);  in bfin_sir_open()
645 	bfin_sir_shutdown(port, dev);  in bfin_sir_open()