tty/serial/21285.c

1 // SPDX-License-Identifier: GPL-2.0
3  * Driver for the serial port on the 21285 StrongArm-110 core logic chip.
19 #include <asm/mach-types.h>
42 static const char serial21285_name[] = "Footbridge UART";
46  * this, use bits of the private_data pointer of the uart port structure.
53 	unsigned long *private_data = (unsigned long *)&port->private_data;  in is_enabled()
62 	unsigned long *private_data = (unsigned long *)&port->private_data;  in enable()
69 	unsigned long *private_data = (unsigned long *)&port->private_data;  in disable()
84  *  BAUD_BASE / baud - 1
88  *  int(BAUD_BASE / baud - 0.5) ->
89  *  int(BAUD_BASE / baud - (baud >> 1) / baud) ->
90  *  int((BAUD_BASE - (baud >> 1)) / baud)
124 	while (!(status & 0x10) && max_count--) {  in serial21285_rx_chars()
127 		port->icount.rx++;  in serial21285_rx_chars()
132 				port->icount.parity++;  in serial21285_rx_chars()
134 				port->icount.frame++;  in serial21285_rx_chars()
136 				port->icount.overrun++;  in serial21285_rx_chars()
138 			rxs &= port->read_status_mask;  in serial21285_rx_chars()
150 	tty_flip_buffer_push(&port->state->port);  in serial21285_rx_chars()
188 	spin_lock_irqsave(&port->lock, flags);  in serial21285_break_ctl()
195 	spin_unlock_irqrestore(&port->lock, flags);  in serial21285_break_ctl()
233 	termios->c_cflag &= ~(HUPCL | CRTSCTS | CMSPAR);  in serial21285_set_termios()
234 	termios->c_cflag |= CLOCAL;  in serial21285_set_termios()
239 	termios->c_iflag &= ~(IGNBRK | BRKINT);  in serial21285_set_termios()
244 	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);   in serial21285_set_termios()
246 	b = port->uartclk / (16 * quot);  in serial21285_set_termios()
249 	switch (termios->c_cflag & CSIZE) {  in serial21285_set_termios()
264 	if (termios->c_cflag & CSTOPB)  in serial21285_set_termios()
266 	if (termios->c_cflag & PARENB) {  in serial21285_set_termios()
268 		if (!(termios->c_cflag & PARODD))  in serial21285_set_termios()
272 	if (port->fifosize)  in serial21285_set_termios()
275 	spin_lock_irqsave(&port->lock, flags);  in serial21285_set_termios()
278 	 * Update the per-port timeout.  in serial21285_set_termios()
280 	uart_update_timeout(port, termios->c_cflag, baud);  in serial21285_set_termios()
285 	port->read_status_mask = RXSTAT_OVERRUN;  in serial21285_set_termios()
286 	if (termios->c_iflag & INPCK)  in serial21285_set_termios()
287 		port->read_status_mask |= RXSTAT_FRAME | RXSTAT_PARITY;  in serial21285_set_termios()
292 	port->ignore_status_mask = 0;  in serial21285_set_termios()
293 	if (termios->c_iflag & IGNPAR)  in serial21285_set_termios()
294 		port->ignore_status_mask |= RXSTAT_FRAME | RXSTAT_PARITY;  in serial21285_set_termios()
295 	if (termios->c_iflag & IGNBRK && termios->c_iflag & IGNPAR)  in serial21285_set_termios()
296 		port->ignore_status_mask |= RXSTAT_OVERRUN;  in serial21285_set_termios()
301 	if ((termios->c_cflag & CREAD) == 0)  in serial21285_set_termios()
302 		port->ignore_status_mask |= RXSTAT_DUMMY_READ;  in serial21285_set_termios()
304 	quot -= 1;  in serial21285_set_termios()
312 	spin_unlock_irqrestore(&port->lock, flags);  in serial21285_set_termios()
317 	return port->type == PORT_21285 ? "DC21285" : NULL;  in serial21285_type()
322 	release_mem_region(port->mapbase, 32);  in serial21285_release_port()
327 	return request_mem_region(port->mapbase, 32, serial21285_name)  in serial21285_request_port()
328 			 != NULL ? 0 : -EBUSY;  in serial21285_request_port()
334 		port->type = PORT_21285;  in serial21285_config_port()
343 	if (ser->type != PORT_UNKNOWN && ser->type != PORT_21285)  in serial21285_verify_port()
344 		ret = -EINVAL;  in serial21285_verify_port()
345 	if (ser->irq <= 0)  in serial21285_verify_port()
346 		ret = -EINVAL;  in serial21285_verify_port()
347 	if (ser->baud_base != port->uartclk / 16)  in serial21285_verify_port()
348 		ret = -EINVAL;  in serial21285_verify_port()
374 	.fifosize	= 16,
431 		*baud = port->uartclk / (16 * (tmp + 1));  in serial21285_get_options()
444 	 * Check whether an invalid uart number has been specified, and  in serial21285_console_setup()
465 	.index		= -1,