tty/serial/mcf.c

53 	struct uart_port	port;
60 static unsigned int mcf_tx_empty(struct uart_port *port)
62 	return (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXEMPTY) ?
68 static unsigned int mcf_get_mctrl(struct uart_port *port)
70 	struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
73 	sigs = (readb(port->membase + MCFUART_UIPR) & MCFUART_UIPR_CTS) ?
76 	sigs |= (mcf_getppdcd(port->line) ? TIOCM_CD : 0);
77 	sigs |= (mcf_getppdtr(port->line) ? TIOCM_DTR : 0);
84 static void mcf_set_mctrl(struct uart_port *port, unsigned int sigs)
86 	struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
89 	mcf_setppdtr(port->line, (sigs & TIOCM_DTR));
91 		writeb(MCFUART_UOP_RTS, port->membase + MCFUART_UOP1);
93 		writeb(MCFUART_UOP_RTS, port->membase + MCFUART_UOP0);
98 static void mcf_start_tx(struct uart_port *port)
100 	struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
102 	if (port->rs485.flags & SER_RS485_ENABLED) {
104 		writeb(MCFUART_UCR_TXENABLE, port->membase + MCFUART_UCR);
106 		writeb(MCFUART_UOP_RTS, port->membase + MCFUART_UOP1);
109 	writeb(pp->imr, port->membase + MCFUART_UIMR);
114 static void mcf_stop_tx(struct uart_port *port)
116 	struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
119 	writeb(pp->imr, port->membase + MCFUART_UIMR);
124 static void mcf_stop_rx(struct uart_port *port)
126 	struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
129 	writeb(pp->imr, port->membase + MCFUART_UIMR);
134 static void mcf_break_ctl(struct uart_port *port, int break_state)
138 	uart_port_lock_irqsave(port, &flags);
140 		writeb(MCFUART_UCR_CMDBREAKSTART, port->membase + MCFUART_UCR);
142 		writeb(MCFUART_UCR_CMDBREAKSTOP, port->membase + MCFUART_UCR);
143 	uart_port_unlock_irqrestore(port, flags);
148 static int mcf_startup(struct uart_port *port)
150 	struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
153 	uart_port_lock_irqsave(port, &flags);
156 	writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR);
157 	writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR);
161 		port->membase + MCFUART_UCR);
165 	writeb(pp->imr, port->membase + MCFUART_UIMR);
167 	uart_port_unlock_irqrestore(port, flags);
174 static void mcf_shutdown(struct uart_port *port)
176 	struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
179 	uart_port_lock_irqsave(port, &flags);
183 	writeb(pp->imr, port->membase + MCFUART_UIMR);
186 	writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR);
187 	writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR);
189 	uart_port_unlock_irqrestore(port, flags);
194 static void mcf_set_termios(struct uart_port *port, struct ktermios *termios,
204 	baud = uart_get_baud_rate(port, termios, old, 0, 230400);
240 	 * FIXME: port->read_status_mask and port->ignore_status_mask
255 	uart_port_lock_irqsave(port, &flags);
256 	if (port->rs485.flags & SER_RS485_ENABLED) {
257 		dev_dbg(port->dev, "Setting UART to RS485\n");
261 	uart_update_timeout(port, termios->c_cflag, baud);
262 	writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR);
263 	writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR);
264 	writeb(MCFUART_UCR_CMDRESETMRPTR, port->membase + MCFUART_UCR);
265 	writeb(mr1, port->membase + MCFUART_UMR);
266 	writeb(mr2, port->membase + MCFUART_UMR);
267 	writeb((baudclk & 0xff00) >> 8, port->membase + MCFUART_UBG1);
268 	writeb((baudclk & 0xff), port->membase + MCFUART_UBG2);
270 	writeb((baudfr & 0x0f), port->membase + MCFUART_UFPD);
273 		port->membase + MCFUART_UCSR);
275 		port->membase + MCFUART_UCR);
276 	uart_port_unlock_irqrestore(port, flags);
283 	struct uart_port *port = &pp->port;
286 	while ((status = readb(port->membase + MCFUART_USR)) & MCFUART_USR_RXREADY) {
287 		ch = readb(port->membase + MCFUART_URB);
289 		port->icount.rx++;
293 				port->membase + MCFUART_UCR);
296 				port->icount.brk++;
297 				if (uart_handle_break(port))
300 				port->icount.parity++;
302 				port->icount.overrun++;
304 				port->icount.frame++;
307 			status &= port->read_status_mask;
317 		if (uart_handle_sysrq_char(port, ch))
319 		uart_insert_char(port, status, MCFUART_USR_RXOVERRUN, ch, flag);
322 	tty_flip_buffer_push(&port->state->port);
329 	struct uart_port *port = &pp->port;
333 	pending = uart_port_tx(port, ch,
334 		readb(port->membase + MCFUART_USR) & MCFUART_USR_TXREADY,
335 		writeb(ch, port->membase + MCFUART_UTB));
338 	if (!pending && (port->rs485.flags & SER_RS485_ENABLED))
339 		writeb(MCFUART_UCR_TXDISABLE, port->membase + MCFUART_UCR);
346 	struct uart_port *port = data;
347 	struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
351 	isr = readb(port->membase + MCFUART_UISR) & pp->imr;
353 	uart_port_lock(port);
362 	uart_port_unlock(port);
369 static void mcf_config_port(struct uart_port *port, int flags)
371 	port->type = PORT_MCF;
372 	port->fifosize = MCFUART_TXFIFOSIZE;
375 	writeb(0, port->membase + MCFUART_UIMR);
377 	if (request_irq(port->irq, mcf_interrupt, 0, "UART", port))
379 			"interrupt vector=%d\n", port->line, port->irq);
384 static const char *mcf_type(struct uart_port *port)
386 	return (port->type == PORT_MCF) ? "ColdFire UART" : NULL;
391 static int mcf_request_port(struct uart_port *port)
399 static void mcf_release_port(struct uart_port *port)
406 static int mcf_verify_port(struct uart_port *port, struct serial_struct *ser)
416 static int mcf_config_rs485(struct uart_port *port, struct ktermios *termios,
422 	mr1 = readb(port->membase + MCFUART_UMR);
423 	mr2 = readb(port->membase + MCFUART_UMR);
425 		dev_dbg(port->dev, "Setting UART to RS485\n");
429 		dev_dbg(port->dev, "Setting UART to RS232\n");
432 	writeb(mr1, port->membase + MCFUART_UMR);
433 	writeb(mr2, port->membase + MCFUART_UMR);
475 	struct uart_port *port = &(mcf_ports + co->index)->port;
479 		if (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXREADY)
482 	writeb(c, port->membase + MCFUART_UTB);
484 		if (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXREADY)
504 	struct uart_port *port;
512 	port = &mcf_ports[co->index].port;
513 	if (port->membase == 0)
519 	return uart_set_options(port, co, baud, parity, bits, flow);
574 	struct uart_port *port;
578 		port = &mcf_ports[i].port;
580 		port->line = i;
581 		port->type = PORT_MCF;
582 		port->mapbase = platp[i].mapbase;
583 		port->membase = (platp[i].membase) ? platp[i].membase :
585 		port->dev = &pdev->dev;
586 		port->iotype = SERIAL_IO_MEM;
587 		port->irq = platp[i].irq;
588 		port->uartclk = MCF_BUSCLK;
589 		port->ops = &mcf_uart_ops;
590 		port->flags = UPF_BOOT_AUTOCONF;
591 		port->rs485_config = mcf_config_rs485;
592 		port->rs485_supported = mcf_rs485_supported;
593 		port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_MCF_CONSOLE);
595 		uart_add_one_port(&mcf_driver, port);
605 	struct uart_port *port;
609 		port = &mcf_ports[i].port;
610 		if (port)
611 			uart_remove_one_port(&mcf_driver, port);