36 static void apbuart_tx_chars(struct uart_port *port);
38 static void apbuart_stop_tx(struct uart_port *port)  in apbuart_stop_tx()  argument
42 	cr = UART_GET_CTRL(port);  in apbuart_stop_tx()
44 	UART_PUT_CTRL(port, cr);  in apbuart_stop_tx()
47 static void apbuart_start_tx(struct uart_port *port)  in apbuart_start_tx()  argument
51 	cr = UART_GET_CTRL(port);  in apbuart_start_tx()
53 	UART_PUT_CTRL(port, cr);  in apbuart_start_tx()
55 	if (UART_GET_STATUS(port) & UART_STATUS_THE)  in apbuart_start_tx()
56 		apbuart_tx_chars(port);  in apbuart_start_tx()
59 static void apbuart_stop_rx(struct uart_port *port)  in apbuart_stop_rx()  argument
63 	cr = UART_GET_CTRL(port);  in apbuart_stop_rx()
65 	UART_PUT_CTRL(port, cr);  in apbuart_stop_rx()
68 static void apbuart_rx_chars(struct uart_port *port)  in apbuart_rx_chars()  argument
71 	unsigned int max_chars = port->fifosize;  in apbuart_rx_chars()
74 	status = UART_GET_STATUS(port);  in apbuart_rx_chars()
78 		ch = UART_GET_CHAR(port);  in apbuart_rx_chars()
81 		port->icount.rx++;  in apbuart_rx_chars()
83 		rsr = UART_GET_STATUS(port) | UART_DUMMY_RSR_RX;  in apbuart_rx_chars()
84 		UART_PUT_STATUS(port, 0);  in apbuart_rx_chars()
89 				port->icount.brk++;  in apbuart_rx_chars()
90 				if (uart_handle_break(port))  in apbuart_rx_chars()
93 				port->icount.parity++;  in apbuart_rx_chars()
95 				port->icount.frame++;  in apbuart_rx_chars()
98 				port->icount.overrun++;  in apbuart_rx_chars()
100 			rsr &= port->read_status_mask;  in apbuart_rx_chars()
108 		if (uart_handle_sysrq_char(port, ch))  in apbuart_rx_chars()
111 		uart_insert_char(port, rsr, UART_STATUS_OE, ch, flag);  in apbuart_rx_chars()
115 		status = UART_GET_STATUS(port);  in apbuart_rx_chars()
118 	tty_flip_buffer_push(&port->state->port);  in apbuart_rx_chars()
121 static void apbuart_tx_chars(struct uart_port *port)  in apbuart_tx_chars()  argument
125 	uart_port_tx_limited(port, ch, port->fifosize,  in apbuart_tx_chars()
127 		UART_PUT_CHAR(port, ch),  in apbuart_tx_chars()
133 	struct uart_port *port = dev_id;  in apbuart_int()  local
136 	spin_lock(&port->lock);  in apbuart_int()
138 	status = UART_GET_STATUS(port);  in apbuart_int()
140 		apbuart_rx_chars(port);  in apbuart_int()
142 		apbuart_tx_chars(port);  in apbuart_int()
144 	spin_unlock(&port->lock);  in apbuart_int()
149 static unsigned int apbuart_tx_empty(struct uart_port *port)  in apbuart_tx_empty()  argument
151 	unsigned int status = UART_GET_STATUS(port);  in apbuart_tx_empty()
155 static unsigned int apbuart_get_mctrl(struct uart_port *port)  in apbuart_get_mctrl()  argument
161 static void apbuart_set_mctrl(struct uart_port *port, unsigned int mctrl)  in apbuart_set_mctrl()  argument
166 static void apbuart_break_ctl(struct uart_port *port, int break_state)  in apbuart_break_ctl()  argument
171 static int apbuart_startup(struct uart_port *port)  in apbuart_startup()  argument
177 	retval = request_irq(port->irq, apbuart_int, 0, "apbuart", port);  in apbuart_startup()
182 	cr = UART_GET_CTRL(port);  in apbuart_startup()
183 	UART_PUT_CTRL(port,  in apbuart_startup()
190 static void apbuart_shutdown(struct uart_port *port)  in apbuart_shutdown()  argument
195 	cr = UART_GET_CTRL(port);  in apbuart_shutdown()
196 	UART_PUT_CTRL(port,  in apbuart_shutdown()
201 	free_irq(port->irq, port);  in apbuart_shutdown()
204 static void apbuart_set_termios(struct uart_port *port,  in apbuart_set_termios()  argument
212 	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16);  in apbuart_set_termios()
214 		panic("invalid baudrate %i\n", port->uartclk / 16);  in apbuart_set_termios()
217 	quot = (uart_get_divisor(port, baud)) * 2;  in apbuart_set_termios()
218 	cr = UART_GET_CTRL(port);  in apbuart_set_termios()
231 	spin_lock_irqsave(&port->lock, flags);  in apbuart_set_termios()
234 	uart_update_timeout(port, termios->c_cflag, baud);  in apbuart_set_termios()
236 	port->read_status_mask = UART_STATUS_OE;  in apbuart_set_termios()
238 		port->read_status_mask |= UART_STATUS_FE | UART_STATUS_PE;  in apbuart_set_termios()
241 	port->ignore_status_mask = 0;  in apbuart_set_termios()
243 		port->ignore_status_mask |= UART_STATUS_FE | UART_STATUS_PE;  in apbuart_set_termios()
247 		port->ignore_status_mask |= UART_DUMMY_RSR_RX;  in apbuart_set_termios()
251 	UART_PUT_SCAL(port, quot);  in apbuart_set_termios()
252 	UART_PUT_CTRL(port, cr);  in apbuart_set_termios()
254 	spin_unlock_irqrestore(&port->lock, flags);  in apbuart_set_termios()
257 static const char *apbuart_type(struct uart_port *port)  in apbuart_type()  argument
259 	return port->type == PORT_APBUART ? "GRLIB/APBUART" : NULL;  in apbuart_type()
262 static void apbuart_release_port(struct uart_port *port)  in apbuart_release_port()  argument
264 	release_mem_region(port->mapbase, 0x100);  in apbuart_release_port()
267 static int apbuart_request_port(struct uart_port *port)  in apbuart_request_port()  argument
269 	return request_mem_region(port->mapbase, 0x100, "grlib-apbuart")  in apbuart_request_port()
275 static void apbuart_config_port(struct uart_port *port, int flags)  in apbuart_config_port()  argument
278 		port->type = PORT_APBUART;  in apbuart_config_port()
279 		apbuart_request_port(port);  in apbuart_config_port()
284 static int apbuart_verify_port(struct uart_port *port,  in apbuart_verify_port()  argument
318 static int apbuart_scan_fifo_size(struct uart_port *port, int portnumber)  in apbuart_scan_fifo_size()  argument
325 	ctrl = UART_GET_CTRL(port);  in apbuart_scan_fifo_size()
336 	UART_PUT_CTRL(port, ctrl | UART_CTRL_TE);  in apbuart_scan_fifo_size()
338 	while (!UART_TX_READY(UART_GET_STATUS(port)))  in apbuart_scan_fifo_size()
346 	UART_PUT_CTRL(port, ctrl & ~(UART_CTRL_TE));  in apbuart_scan_fifo_size()
349 	UART_PUT_CHAR(port, 0);  in apbuart_scan_fifo_size()
357 	status = UART_GET_STATUS(port);  in apbuart_scan_fifo_size()
360 		UART_PUT_CHAR(port, 0);  in apbuart_scan_fifo_size()
361 		status = UART_GET_STATUS(port);  in apbuart_scan_fifo_size()
366 	UART_PUT_CTRL(port, ctrl);  in apbuart_scan_fifo_size()
375 static void apbuart_flush_fifo(struct uart_port *port)  in apbuart_flush_fifo()  argument
379 	for (i = 0; i < port->fifosize; i++)  in apbuart_flush_fifo()
380 		UART_GET_CHAR(port);  in apbuart_flush_fifo()
390 static void apbuart_console_putchar(struct uart_port *port, unsigned char ch)  in apbuart_console_putchar()  argument
394 		status = UART_GET_STATUS(port);  in apbuart_console_putchar()
396 	UART_PUT_CHAR(port, ch);  in apbuart_console_putchar()
402 	struct uart_port *port = &grlib_apbuart_ports[co->index];  in apbuart_console_write()  local
406 	old_cr = UART_GET_CTRL(port);  in apbuart_console_write()
408 	UART_PUT_CTRL(port, new_cr);  in apbuart_console_write()
410 	uart_console_write(port, s, count, apbuart_console_putchar);  in apbuart_console_write()
417 		status = UART_GET_STATUS(port);  in apbuart_console_write()
419 	UART_PUT_CTRL(port, old_cr);  in apbuart_console_write()
423 apbuart_console_get_options(struct uart_port *port, int *baud,  in apbuart_console_get_options()  argument
426 	if (UART_GET_CTRL(port) & (UART_CTRL_RE | UART_CTRL_TE)) {  in apbuart_console_get_options()
429 		status = UART_GET_STATUS(port);  in apbuart_console_get_options()
440 		quot = UART_GET_SCAL(port) / 8;  in apbuart_console_get_options()
441 		*baud = port->uartclk / (16 * (quot + 1));  in apbuart_console_get_options()
447 	struct uart_port *port;  in apbuart_console_setup()  local
464 	port = &grlib_apbuart_ports[co->index];  in apbuart_console_setup()
466 	spin_lock_init(&port->lock);  in apbuart_console_setup()
471 		apbuart_console_get_options(port, &baud, &parity, &bits);  in apbuart_console_setup()
473 	return uart_set_options(port, co, baud, parity, bits, flow);  in apbuart_console_setup()
524 	struct uart_port *port = NULL;  in apbuart_probe()  local
531 	port = &grlib_apbuart_ports[i];  in apbuart_probe()
532 	port->dev = &op->dev;  in apbuart_probe()
533 	port->irq = op->archdata.irqs[0];  in apbuart_probe()
535 	uart_add_one_port(&grlib_apbuart_driver, (struct uart_port *) port);  in apbuart_probe()
537 	apbuart_flush_fifo((struct uart_port *) port);  in apbuart_probe()
540 	       (unsigned long long) port->mapbase, port->irq);  in apbuart_probe()
573 		struct uart_port *port;  in grlib_apbuart_configure()  local
590 		port = &grlib_apbuart_ports[line];  in grlib_apbuart_configure()
592 		port->mapbase = addr;  in grlib_apbuart_configure()
593 		port->membase = ioremap(addr, sizeof(struct grlib_apbuart_regs_map));  in grlib_apbuart_configure()
594 		port->irq = 0;  in grlib_apbuart_configure()
595 		port->iotype = UPIO_MEM;  in grlib_apbuart_configure()
596 		port->ops = &grlib_apbuart_ops;  in grlib_apbuart_configure()
597 		port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_GRLIB_GAISLER_APBUART_CONSOLE);  in grlib_apbuart_configure()
598 		port->flags = UPF_BOOT_AUTOCONF;  in grlib_apbuart_configure()
599 		port->line = line;  in grlib_apbuart_configure()
600 		port->uartclk = *freq_hz;  in grlib_apbuart_configure()
601 		port->fifosize = apbuart_scan_fifo_size((struct uart_port *) port, line);  in grlib_apbuart_configure()