39 static void apbuart_tx_chars(struct uart_port *port);
41 static void apbuart_stop_tx(struct uart_port *port)  in apbuart_stop_tx()  argument
45 	cr = UART_GET_CTRL(port);  in apbuart_stop_tx()
47 	UART_PUT_CTRL(port, cr);  in apbuart_stop_tx()
50 static void apbuart_start_tx(struct uart_port *port)  in apbuart_start_tx()  argument
54 	cr = UART_GET_CTRL(port);  in apbuart_start_tx()
56 	UART_PUT_CTRL(port, cr);  in apbuart_start_tx()
58 	if (UART_GET_STATUS(port) & UART_STATUS_THE)  in apbuart_start_tx()
59 		apbuart_tx_chars(port);  in apbuart_start_tx()
62 static void apbuart_stop_rx(struct uart_port *port)  in apbuart_stop_rx()  argument
66 	cr = UART_GET_CTRL(port);  in apbuart_stop_rx()
68 	UART_PUT_CTRL(port, cr);  in apbuart_stop_rx()
71 static void apbuart_rx_chars(struct uart_port *port)  in apbuart_rx_chars()  argument
74 	unsigned int max_chars = port->fifosize;  in apbuart_rx_chars()
76 	status = UART_GET_STATUS(port);  in apbuart_rx_chars()
80 		ch = UART_GET_CHAR(port);  in apbuart_rx_chars()
83 		port->icount.rx++;  in apbuart_rx_chars()
85 		rsr = UART_GET_STATUS(port) | UART_DUMMY_RSR_RX;  in apbuart_rx_chars()
86 		UART_PUT_STATUS(port, 0);  in apbuart_rx_chars()
91 				port->icount.brk++;  in apbuart_rx_chars()
92 				if (uart_handle_break(port))  in apbuart_rx_chars()
95 				port->icount.parity++;  in apbuart_rx_chars()
97 				port->icount.frame++;  in apbuart_rx_chars()
100 				port->icount.overrun++;  in apbuart_rx_chars()
102 			rsr &= port->read_status_mask;  in apbuart_rx_chars()
110 		if (uart_handle_sysrq_char(port, ch))  in apbuart_rx_chars()
113 		uart_insert_char(port, rsr, UART_STATUS_OE, ch, flag);  in apbuart_rx_chars()
117 		status = UART_GET_STATUS(port);  in apbuart_rx_chars()
120 	tty_flip_buffer_push(&port->state->port);  in apbuart_rx_chars()
123 static void apbuart_tx_chars(struct uart_port *port)  in apbuart_tx_chars()  argument
125 	struct circ_buf *xmit = &port->state->xmit;  in apbuart_tx_chars()
128 	if (port->x_char) {  in apbuart_tx_chars()
129 		UART_PUT_CHAR(port, port->x_char);  in apbuart_tx_chars()
130 		port->icount.tx++;  in apbuart_tx_chars()
131 		port->x_char = 0;  in apbuart_tx_chars()
135 	if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {  in apbuart_tx_chars()
136 		apbuart_stop_tx(port);  in apbuart_tx_chars()
141 	count = port->fifosize >> 1;  in apbuart_tx_chars()
143 		UART_PUT_CHAR(port, xmit->buf[xmit->tail]);  in apbuart_tx_chars()
145 		port->icount.tx++;  in apbuart_tx_chars()
151 		uart_write_wakeup(port);  in apbuart_tx_chars()
154 		apbuart_stop_tx(port);  in apbuart_tx_chars()
159 	struct uart_port *port = dev_id;  in apbuart_int()  local
162 	spin_lock(&port->lock);  in apbuart_int()
164 	status = UART_GET_STATUS(port);  in apbuart_int()
166 		apbuart_rx_chars(port);  in apbuart_int()
168 		apbuart_tx_chars(port);  in apbuart_int()
170 	spin_unlock(&port->lock);  in apbuart_int()
175 static unsigned int apbuart_tx_empty(struct uart_port *port)  in apbuart_tx_empty()  argument
177 	unsigned int status = UART_GET_STATUS(port);  in apbuart_tx_empty()
181 static unsigned int apbuart_get_mctrl(struct uart_port *port)  in apbuart_get_mctrl()  argument
187 static void apbuart_set_mctrl(struct uart_port *port, unsigned int mctrl)  in apbuart_set_mctrl()  argument
192 static void apbuart_break_ctl(struct uart_port *port, int break_state)  in apbuart_break_ctl()  argument
197 static int apbuart_startup(struct uart_port *port)  in apbuart_startup()  argument
203 	retval = request_irq(port->irq, apbuart_int, 0, "apbuart", port);  in apbuart_startup()
208 	cr = UART_GET_CTRL(port);  in apbuart_startup()
209 	UART_PUT_CTRL(port,  in apbuart_startup()
216 static void apbuart_shutdown(struct uart_port *port)  in apbuart_shutdown()  argument
221 	cr = UART_GET_CTRL(port);  in apbuart_shutdown()
222 	UART_PUT_CTRL(port,  in apbuart_shutdown()
227 	free_irq(port->irq, port);  in apbuart_shutdown()
230 static void apbuart_set_termios(struct uart_port *port,  in apbuart_set_termios()  argument
238 	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16);  in apbuart_set_termios()
240 		panic("invalid baudrate %i\n", port->uartclk / 16);  in apbuart_set_termios()
243 	quot = (uart_get_divisor(port, baud)) * 2;  in apbuart_set_termios()
244 	cr = UART_GET_CTRL(port);  in apbuart_set_termios()
257 	spin_lock_irqsave(&port->lock, flags);  in apbuart_set_termios()
260 	uart_update_timeout(port, termios->c_cflag, baud);  in apbuart_set_termios()
262 	port->read_status_mask = UART_STATUS_OE;  in apbuart_set_termios()
264 		port->read_status_mask |= UART_STATUS_FE | UART_STATUS_PE;  in apbuart_set_termios()
267 	port->ignore_status_mask = 0;  in apbuart_set_termios()
269 		port->ignore_status_mask |= UART_STATUS_FE | UART_STATUS_PE;  in apbuart_set_termios()
273 		port->ignore_status_mask |= UART_DUMMY_RSR_RX;  in apbuart_set_termios()
277 	UART_PUT_SCAL(port, quot);  in apbuart_set_termios()
278 	UART_PUT_CTRL(port, cr);  in apbuart_set_termios()
280 	spin_unlock_irqrestore(&port->lock, flags);  in apbuart_set_termios()
283 static const char *apbuart_type(struct uart_port *port)  in apbuart_type()  argument
285 	return port->type == PORT_APBUART ? "GRLIB/APBUART" : NULL;  in apbuart_type()
288 static void apbuart_release_port(struct uart_port *port)  in apbuart_release_port()  argument
290 	release_mem_region(port->mapbase, 0x100);  in apbuart_release_port()
293 static int apbuart_request_port(struct uart_port *port)  in apbuart_request_port()  argument
295 	return request_mem_region(port->mapbase, 0x100, "grlib-apbuart")  in apbuart_request_port()
301 static void apbuart_config_port(struct uart_port *port, int flags)  in apbuart_config_port()  argument
304 		port->type = PORT_APBUART;  in apbuart_config_port()
305 		apbuart_request_port(port);  in apbuart_config_port()
310 static int apbuart_verify_port(struct uart_port *port,  in apbuart_verify_port()  argument
344 static int apbuart_scan_fifo_size(struct uart_port *port, int portnumber)  in apbuart_scan_fifo_size()  argument
351 	ctrl = UART_GET_CTRL(port);  in apbuart_scan_fifo_size()
362 	UART_PUT_CTRL(port, ctrl | UART_CTRL_TE);  in apbuart_scan_fifo_size()
364 	while (!UART_TX_READY(UART_GET_STATUS(port)))  in apbuart_scan_fifo_size()
372 	UART_PUT_CTRL(port, ctrl & ~(UART_CTRL_TE));  in apbuart_scan_fifo_size()
375 	UART_PUT_CHAR(port, 0);  in apbuart_scan_fifo_size()
383 	status = UART_GET_STATUS(port);  in apbuart_scan_fifo_size()
386 		UART_PUT_CHAR(port, 0);  in apbuart_scan_fifo_size()
387 		status = UART_GET_STATUS(port);  in apbuart_scan_fifo_size()
392 	UART_PUT_CTRL(port, ctrl);  in apbuart_scan_fifo_size()
401 static void apbuart_flush_fifo(struct uart_port *port)  in apbuart_flush_fifo()  argument
405 	for (i = 0; i < port->fifosize; i++)  in apbuart_flush_fifo()
406 		UART_GET_CHAR(port);  in apbuart_flush_fifo()
416 static void apbuart_console_putchar(struct uart_port *port, unsigned char ch)  in apbuart_console_putchar()  argument
420 		status = UART_GET_STATUS(port);  in apbuart_console_putchar()
422 	UART_PUT_CHAR(port, ch);  in apbuart_console_putchar()
428 	struct uart_port *port = &grlib_apbuart_ports[co->index];  in apbuart_console_write()  local
432 	old_cr = UART_GET_CTRL(port);  in apbuart_console_write()
434 	UART_PUT_CTRL(port, new_cr);  in apbuart_console_write()
436 	uart_console_write(port, s, count, apbuart_console_putchar);  in apbuart_console_write()
443 		status = UART_GET_STATUS(port);  in apbuart_console_write()
445 	UART_PUT_CTRL(port, old_cr);  in apbuart_console_write()
449 apbuart_console_get_options(struct uart_port *port, int *baud,  in apbuart_console_get_options()  argument
452 	if (UART_GET_CTRL(port) & (UART_CTRL_RE | UART_CTRL_TE)) {  in apbuart_console_get_options()
455 		status = UART_GET_STATUS(port);  in apbuart_console_get_options()
466 		quot = UART_GET_SCAL(port) / 8;  in apbuart_console_get_options()
467 		*baud = port->uartclk / (16 * (quot + 1));  in apbuart_console_get_options()
473 	struct uart_port *port;  in apbuart_console_setup()  local
490 	port = &grlib_apbuart_ports[co->index];  in apbuart_console_setup()
492 	spin_lock_init(&port->lock);  in apbuart_console_setup()
497 		apbuart_console_get_options(port, &baud, &parity, &bits);  in apbuart_console_setup()
499 	return uart_set_options(port, co, baud, parity, bits, flow);  in apbuart_console_setup()
550 	struct uart_port *port = NULL;  in apbuart_probe()  local
557 	port = &grlib_apbuart_ports[i];  in apbuart_probe()
558 	port->dev = &op->dev;  in apbuart_probe()
559 	port->irq = op->archdata.irqs[0];  in apbuart_probe()
561 	uart_add_one_port(&grlib_apbuart_driver, (struct uart_port *) port);  in apbuart_probe()
563 	apbuart_flush_fifo((struct uart_port *) port);  in apbuart_probe()
566 	       (unsigned long long) port->mapbase, port->irq);  in apbuart_probe()
599 		struct uart_port *port;  in grlib_apbuart_configure()  local
616 		port = &grlib_apbuart_ports[line];  in grlib_apbuart_configure()
618 		port->mapbase = addr;  in grlib_apbuart_configure()
619 		port->membase = ioremap(addr, sizeof(struct grlib_apbuart_regs_map));  in grlib_apbuart_configure()
620 		port->irq = 0;  in grlib_apbuart_configure()
621 		port->iotype = UPIO_MEM;  in grlib_apbuart_configure()
622 		port->ops = &grlib_apbuart_ops;  in grlib_apbuart_configure()
623 		port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_GRLIB_GAISLER_APBUART_CONSOLE);  in grlib_apbuart_configure()
624 		port->flags = UPF_BOOT_AUTOCONF;  in grlib_apbuart_configure()
625 		port->line = line;  in grlib_apbuart_configure()
626 		port->uartclk = *freq_hz;  in grlib_apbuart_configure()
627 		port->fifosize = apbuart_scan_fifo_size((struct uart_port *) port, line);  in grlib_apbuart_configure()