2 * Driver for SA11x0 serial ports
4 * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
6 * Copyright (C) 2000 Deep Blue Solutions Ltd.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #if defined(CONFIG_SERIAL_SA1100_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
27 #include <linux/module.h>
28 #include <linux/ioport.h>
29 #include <linux/init.h>
30 #include <linux/console.h>
31 #include <linux/sysrq.h>
32 #include <linux/platform_data/sa11x0-serial.h>
33 #include <linux/platform_device.h>
34 #include <linux/tty.h>
35 #include <linux/tty_flip.h>
36 #include <linux/serial_core.h>
37 #include <linux/serial.h>
41 #include <mach/hardware.h>
42 #include <mach/irqs.h>
44 /* We've been assigned a range on the "Low-density serial ports" major */
45 #define SERIAL_SA1100_MAJOR 204
50 #define SA1100_ISR_PASS_LIMIT 256
53 * Convert from ignore_status_mask or read_status_mask to UTSR[01]
55 #define SM_TO_UTSR0(x) ((x) & 0xff)
56 #define SM_TO_UTSR1(x) ((x) >> 8)
57 #define UTSR0_TO_SM(x) ((x))
58 #define UTSR1_TO_SM(x) ((x) << 8)
60 #define UART_GET_UTCR0(sport) __raw_readl((sport)->port.membase + UTCR0)
61 #define UART_GET_UTCR1(sport) __raw_readl((sport)->port.membase + UTCR1)
62 #define UART_GET_UTCR2(sport) __raw_readl((sport)->port.membase + UTCR2)
63 #define UART_GET_UTCR3(sport) __raw_readl((sport)->port.membase + UTCR3)
64 #define UART_GET_UTSR0(sport) __raw_readl((sport)->port.membase + UTSR0)
65 #define UART_GET_UTSR1(sport) __raw_readl((sport)->port.membase + UTSR1)
66 #define UART_GET_CHAR(sport) __raw_readl((sport)->port.membase + UTDR)
68 #define UART_PUT_UTCR0(sport,v) __raw_writel((v),(sport)->port.membase + UTCR0)
69 #define UART_PUT_UTCR1(sport,v) __raw_writel((v),(sport)->port.membase + UTCR1)
70 #define UART_PUT_UTCR2(sport,v) __raw_writel((v),(sport)->port.membase + UTCR2)
71 #define UART_PUT_UTCR3(sport,v) __raw_writel((v),(sport)->port.membase + UTCR3)
72 #define UART_PUT_UTSR0(sport,v) __raw_writel((v),(sport)->port.membase + UTSR0)
73 #define UART_PUT_UTSR1(sport,v) __raw_writel((v),(sport)->port.membase + UTSR1)
74 #define UART_PUT_CHAR(sport,v) __raw_writel((v),(sport)->port.membase + UTDR)
77 * This is the size of our serial port register set.
79 #define UART_PORT_SIZE 0x24
82 * This determines how often we check the modem status signals
83 * for any change. They generally aren't connected to an IRQ
84 * so we have to poll them. We also check immediately before
85 * filling the TX fifo incase CTS has been dropped.
87 #define MCTRL_TIMEOUT (250*HZ/1000)
90 struct uart_port port;
91 struct timer_list timer;
92 unsigned int old_status;
96 * Handle any change of modem status signal since we were last called.
98 static void sa1100_mctrl_check(struct sa1100_port *sport)
100 unsigned int status, changed;
102 status = sport->port.ops->get_mctrl(&sport->port);
103 changed = status ^ sport->old_status;
108 sport->old_status = status;
110 if (changed & TIOCM_RI)
111 sport->port.icount.rng++;
112 if (changed & TIOCM_DSR)
113 sport->port.icount.dsr++;
114 if (changed & TIOCM_CAR)
115 uart_handle_dcd_change(&sport->port, status & TIOCM_CAR);
116 if (changed & TIOCM_CTS)
117 uart_handle_cts_change(&sport->port, status & TIOCM_CTS);
119 wake_up_interruptible(&sport->port.state->port.delta_msr_wait);
123 * This is our per-port timeout handler, for checking the
124 * modem status signals.
126 static void sa1100_timeout(unsigned long data)
128 struct sa1100_port *sport = (struct sa1100_port *)data;
131 if (sport->port.state) {
132 spin_lock_irqsave(&sport->port.lock, flags);
133 sa1100_mctrl_check(sport);
134 spin_unlock_irqrestore(&sport->port.lock, flags);
136 mod_timer(&sport->timer, jiffies + MCTRL_TIMEOUT);
141 * interrupts disabled on entry
143 static void sa1100_stop_tx(struct uart_port *port)
145 struct sa1100_port *sport =
146 container_of(port, struct sa1100_port, port);
149 utcr3 = UART_GET_UTCR3(sport);
150 UART_PUT_UTCR3(sport, utcr3 & ~UTCR3_TIE);
151 sport->port.read_status_mask &= ~UTSR0_TO_SM(UTSR0_TFS);
155 * port locked and interrupts disabled
157 static void sa1100_start_tx(struct uart_port *port)
159 struct sa1100_port *sport =
160 container_of(port, struct sa1100_port, port);
163 utcr3 = UART_GET_UTCR3(sport);
164 sport->port.read_status_mask |= UTSR0_TO_SM(UTSR0_TFS);
165 UART_PUT_UTCR3(sport, utcr3 | UTCR3_TIE);
171 static void sa1100_stop_rx(struct uart_port *port)
173 struct sa1100_port *sport =
174 container_of(port, struct sa1100_port, port);
177 utcr3 = UART_GET_UTCR3(sport);
178 UART_PUT_UTCR3(sport, utcr3 & ~UTCR3_RIE);
182 * Set the modem control timer to fire immediately.
184 static void sa1100_enable_ms(struct uart_port *port)
186 struct sa1100_port *sport =
187 container_of(port, struct sa1100_port, port);
189 mod_timer(&sport->timer, jiffies);
193 sa1100_rx_chars(struct sa1100_port *sport)
195 unsigned int status, ch, flg;
197 status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) |
198 UTSR0_TO_SM(UART_GET_UTSR0(sport));
199 while (status & UTSR1_TO_SM(UTSR1_RNE)) {
200 ch = UART_GET_CHAR(sport);
202 sport->port.icount.rx++;
207 * note that the error handling code is
208 * out of the main execution path
210 if (status & UTSR1_TO_SM(UTSR1_PRE | UTSR1_FRE | UTSR1_ROR)) {
211 if (status & UTSR1_TO_SM(UTSR1_PRE))
212 sport->port.icount.parity++;
213 else if (status & UTSR1_TO_SM(UTSR1_FRE))
214 sport->port.icount.frame++;
215 if (status & UTSR1_TO_SM(UTSR1_ROR))
216 sport->port.icount.overrun++;
218 status &= sport->port.read_status_mask;
220 if (status & UTSR1_TO_SM(UTSR1_PRE))
222 else if (status & UTSR1_TO_SM(UTSR1_FRE))
226 sport->port.sysrq = 0;
230 if (uart_handle_sysrq_char(&sport->port, ch))
233 uart_insert_char(&sport->port, status, UTSR1_TO_SM(UTSR1_ROR), ch, flg);
236 status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) |
237 UTSR0_TO_SM(UART_GET_UTSR0(sport));
240 spin_unlock(&sport->port.lock);
241 tty_flip_buffer_push(&sport->port.state->port);
242 spin_lock(&sport->port.lock);
245 static void sa1100_tx_chars(struct sa1100_port *sport)
247 struct circ_buf *xmit = &sport->port.state->xmit;
249 if (sport->port.x_char) {
250 UART_PUT_CHAR(sport, sport->port.x_char);
251 sport->port.icount.tx++;
252 sport->port.x_char = 0;
257 * Check the modem control lines before
258 * transmitting anything.
260 sa1100_mctrl_check(sport);
262 if (uart_circ_empty(xmit) || uart_tx_stopped(&sport->port)) {
263 sa1100_stop_tx(&sport->port);
268 * Tried using FIFO (not checking TNF) for fifo fill:
269 * still had the '4 bytes repeated' problem.
271 while (UART_GET_UTSR1(sport) & UTSR1_TNF) {
272 UART_PUT_CHAR(sport, xmit->buf[xmit->tail]);
273 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
274 sport->port.icount.tx++;
275 if (uart_circ_empty(xmit))
279 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
280 uart_write_wakeup(&sport->port);
282 if (uart_circ_empty(xmit))
283 sa1100_stop_tx(&sport->port);
286 static irqreturn_t sa1100_int(int irq, void *dev_id)
288 struct sa1100_port *sport = dev_id;
289 unsigned int status, pass_counter = 0;
291 spin_lock(&sport->port.lock);
292 status = UART_GET_UTSR0(sport);
293 status &= SM_TO_UTSR0(sport->port.read_status_mask) | ~UTSR0_TFS;
295 if (status & (UTSR0_RFS | UTSR0_RID)) {
296 /* Clear the receiver idle bit, if set */
297 if (status & UTSR0_RID)
298 UART_PUT_UTSR0(sport, UTSR0_RID);
299 sa1100_rx_chars(sport);
302 /* Clear the relevant break bits */
303 if (status & (UTSR0_RBB | UTSR0_REB))
304 UART_PUT_UTSR0(sport, status & (UTSR0_RBB | UTSR0_REB));
306 if (status & UTSR0_RBB)
307 sport->port.icount.brk++;
309 if (status & UTSR0_REB)
310 uart_handle_break(&sport->port);
312 if (status & UTSR0_TFS)
313 sa1100_tx_chars(sport);
314 if (pass_counter++ > SA1100_ISR_PASS_LIMIT)
316 status = UART_GET_UTSR0(sport);
317 status &= SM_TO_UTSR0(sport->port.read_status_mask) |
319 } while (status & (UTSR0_TFS | UTSR0_RFS | UTSR0_RID));
320 spin_unlock(&sport->port.lock);
326 * Return TIOCSER_TEMT when transmitter is not busy.
328 static unsigned int sa1100_tx_empty(struct uart_port *port)
330 struct sa1100_port *sport =
331 container_of(port, struct sa1100_port, port);
333 return UART_GET_UTSR1(sport) & UTSR1_TBY ? 0 : TIOCSER_TEMT;
336 static unsigned int sa1100_get_mctrl(struct uart_port *port)
338 return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
341 static void sa1100_set_mctrl(struct uart_port *port, unsigned int mctrl)
346 * Interrupts always disabled.
348 static void sa1100_break_ctl(struct uart_port *port, int break_state)
350 struct sa1100_port *sport =
351 container_of(port, struct sa1100_port, port);
355 spin_lock_irqsave(&sport->port.lock, flags);
356 utcr3 = UART_GET_UTCR3(sport);
357 if (break_state == -1)
361 UART_PUT_UTCR3(sport, utcr3);
362 spin_unlock_irqrestore(&sport->port.lock, flags);
365 static int sa1100_startup(struct uart_port *port)
367 struct sa1100_port *sport =
368 container_of(port, struct sa1100_port, port);
374 retval = request_irq(sport->port.irq, sa1100_int, 0,
375 "sa11x0-uart", sport);
380 * Finally, clear and enable interrupts
382 UART_PUT_UTSR0(sport, -1);
383 UART_PUT_UTCR3(sport, UTCR3_RXE | UTCR3_TXE | UTCR3_RIE);
386 * Enable modem status interrupts
388 spin_lock_irq(&sport->port.lock);
389 sa1100_enable_ms(&sport->port);
390 spin_unlock_irq(&sport->port.lock);
395 static void sa1100_shutdown(struct uart_port *port)
397 struct sa1100_port *sport =
398 container_of(port, struct sa1100_port, port);
403 del_timer_sync(&sport->timer);
408 free_irq(sport->port.irq, sport);
411 * Disable all interrupts, port and break condition.
413 UART_PUT_UTCR3(sport, 0);
417 sa1100_set_termios(struct uart_port *port, struct ktermios *termios,
418 struct ktermios *old)
420 struct sa1100_port *sport =
421 container_of(port, struct sa1100_port, port);
423 unsigned int utcr0, old_utcr3, baud, quot;
424 unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8;
427 * We only support CS7 and CS8.
429 while ((termios->c_cflag & CSIZE) != CS7 &&
430 (termios->c_cflag & CSIZE) != CS8) {
431 termios->c_cflag &= ~CSIZE;
432 termios->c_cflag |= old_csize;
436 if ((termios->c_cflag & CSIZE) == CS8)
441 if (termios->c_cflag & CSTOPB)
443 if (termios->c_cflag & PARENB) {
445 if (!(termios->c_cflag & PARODD))
450 * Ask the core to calculate the divisor for us.
452 baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
453 quot = uart_get_divisor(port, baud);
455 spin_lock_irqsave(&sport->port.lock, flags);
457 sport->port.read_status_mask &= UTSR0_TO_SM(UTSR0_TFS);
458 sport->port.read_status_mask |= UTSR1_TO_SM(UTSR1_ROR);
459 if (termios->c_iflag & INPCK)
460 sport->port.read_status_mask |=
461 UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE);
462 if (termios->c_iflag & (BRKINT | PARMRK))
463 sport->port.read_status_mask |=
464 UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB);
467 * Characters to ignore
469 sport->port.ignore_status_mask = 0;
470 if (termios->c_iflag & IGNPAR)
471 sport->port.ignore_status_mask |=
472 UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE);
473 if (termios->c_iflag & IGNBRK) {
474 sport->port.ignore_status_mask |=
475 UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB);
477 * If we're ignoring parity and break indicators,
478 * ignore overruns too (for real raw support).
480 if (termios->c_iflag & IGNPAR)
481 sport->port.ignore_status_mask |=
482 UTSR1_TO_SM(UTSR1_ROR);
485 del_timer_sync(&sport->timer);
488 * Update the per-port timeout.
490 uart_update_timeout(port, termios->c_cflag, baud);
493 * disable interrupts and drain transmitter
495 old_utcr3 = UART_GET_UTCR3(sport);
496 UART_PUT_UTCR3(sport, old_utcr3 & ~(UTCR3_RIE | UTCR3_TIE));
498 while (UART_GET_UTSR1(sport) & UTSR1_TBY)
501 /* then, disable everything */
502 UART_PUT_UTCR3(sport, 0);
504 /* set the parity, stop bits and data size */
505 UART_PUT_UTCR0(sport, utcr0);
507 /* set the baud rate */
509 UART_PUT_UTCR1(sport, ((quot & 0xf00) >> 8));
510 UART_PUT_UTCR2(sport, (quot & 0xff));
512 UART_PUT_UTSR0(sport, -1);
514 UART_PUT_UTCR3(sport, old_utcr3);
516 if (UART_ENABLE_MS(&sport->port, termios->c_cflag))
517 sa1100_enable_ms(&sport->port);
519 spin_unlock_irqrestore(&sport->port.lock, flags);
522 static const char *sa1100_type(struct uart_port *port)
524 struct sa1100_port *sport =
525 container_of(port, struct sa1100_port, port);
527 return sport->port.type == PORT_SA1100 ? "SA1100" : NULL;
531 * Release the memory region(s) being used by 'port'.
533 static void sa1100_release_port(struct uart_port *port)
535 struct sa1100_port *sport =
536 container_of(port, struct sa1100_port, port);
538 release_mem_region(sport->port.mapbase, UART_PORT_SIZE);
542 * Request the memory region(s) being used by 'port'.
544 static int sa1100_request_port(struct uart_port *port)
546 struct sa1100_port *sport =
547 container_of(port, struct sa1100_port, port);
549 return request_mem_region(sport->port.mapbase, UART_PORT_SIZE,
550 "sa11x0-uart") != NULL ? 0 : -EBUSY;
554 * Configure/autoconfigure the port.
556 static void sa1100_config_port(struct uart_port *port, int flags)
558 struct sa1100_port *sport =
559 container_of(port, struct sa1100_port, port);
561 if (flags & UART_CONFIG_TYPE &&
562 sa1100_request_port(&sport->port) == 0)
563 sport->port.type = PORT_SA1100;
567 * Verify the new serial_struct (for TIOCSSERIAL).
568 * The only change we allow are to the flags and type, and
569 * even then only between PORT_SA1100 and PORT_UNKNOWN
572 sa1100_verify_port(struct uart_port *port, struct serial_struct *ser)
574 struct sa1100_port *sport =
575 container_of(port, struct sa1100_port, port);
578 if (ser->type != PORT_UNKNOWN && ser->type != PORT_SA1100)
580 if (sport->port.irq != ser->irq)
582 if (ser->io_type != SERIAL_IO_MEM)
584 if (sport->port.uartclk / 16 != ser->baud_base)
586 if ((void *)sport->port.mapbase != ser->iomem_base)
588 if (sport->port.iobase != ser->port)
595 static struct uart_ops sa1100_pops = {
596 .tx_empty = sa1100_tx_empty,
597 .set_mctrl = sa1100_set_mctrl,
598 .get_mctrl = sa1100_get_mctrl,
599 .stop_tx = sa1100_stop_tx,
600 .start_tx = sa1100_start_tx,
601 .stop_rx = sa1100_stop_rx,
602 .enable_ms = sa1100_enable_ms,
603 .break_ctl = sa1100_break_ctl,
604 .startup = sa1100_startup,
605 .shutdown = sa1100_shutdown,
606 .set_termios = sa1100_set_termios,
608 .release_port = sa1100_release_port,
609 .request_port = sa1100_request_port,
610 .config_port = sa1100_config_port,
611 .verify_port = sa1100_verify_port,
614 static struct sa1100_port sa1100_ports[NR_PORTS];
617 * Setup the SA1100 serial ports. Note that we don't include the IrDA
618 * port here since we have our own SIR/FIR driver (see drivers/net/irda)
620 * Note also that we support "console=ttySAx" where "x" is either 0 or 1.
621 * Which serial port this ends up being depends on the machine you're
622 * running this kernel on. I'm not convinced that this is a good idea,
623 * but that's the way it traditionally works.
625 * Note that NanoEngine UART3 becomes UART2, and UART2 is no longer
628 static void __init sa1100_init_ports(void)
630 static int first = 1;
637 for (i = 0; i < NR_PORTS; i++) {
638 sa1100_ports[i].port.uartclk = 3686400;
639 sa1100_ports[i].port.ops = &sa1100_pops;
640 sa1100_ports[i].port.fifosize = 8;
641 sa1100_ports[i].port.line = i;
642 sa1100_ports[i].port.iotype = UPIO_MEM;
643 init_timer(&sa1100_ports[i].timer);
644 sa1100_ports[i].timer.function = sa1100_timeout;
645 sa1100_ports[i].timer.data = (unsigned long)&sa1100_ports[i];
649 * make transmit lines outputs, so that when the port
650 * is closed, the output is in the MARK state.
652 PPDR |= PPC_TXD1 | PPC_TXD3;
653 PPSR |= PPC_TXD1 | PPC_TXD3;
656 void sa1100_register_uart_fns(struct sa1100_port_fns *fns)
659 sa1100_pops.get_mctrl = fns->get_mctrl;
661 sa1100_pops.set_mctrl = fns->set_mctrl;
663 sa1100_pops.pm = fns->pm;
665 * FIXME: fns->set_wake is unused - this should be called from
666 * the suspend() callback if device_may_wakeup(dev)) is set.
670 void __init sa1100_register_uart(int idx, int port)
672 if (idx >= NR_PORTS) {
673 printk(KERN_ERR "%s: bad index number %d\n", __func__, idx);
679 sa1100_ports[idx].port.membase = (void __iomem *)&Ser1UTCR0;
680 sa1100_ports[idx].port.mapbase = _Ser1UTCR0;
681 sa1100_ports[idx].port.irq = IRQ_Ser1UART;
682 sa1100_ports[idx].port.flags = UPF_BOOT_AUTOCONF;
686 sa1100_ports[idx].port.membase = (void __iomem *)&Ser2UTCR0;
687 sa1100_ports[idx].port.mapbase = _Ser2UTCR0;
688 sa1100_ports[idx].port.irq = IRQ_Ser2ICP;
689 sa1100_ports[idx].port.flags = UPF_BOOT_AUTOCONF;
693 sa1100_ports[idx].port.membase = (void __iomem *)&Ser3UTCR0;
694 sa1100_ports[idx].port.mapbase = _Ser3UTCR0;
695 sa1100_ports[idx].port.irq = IRQ_Ser3UART;
696 sa1100_ports[idx].port.flags = UPF_BOOT_AUTOCONF;
700 printk(KERN_ERR "%s: bad port number %d\n", __func__, port);
705 #ifdef CONFIG_SERIAL_SA1100_CONSOLE
706 static void sa1100_console_putchar(struct uart_port *port, int ch)
708 struct sa1100_port *sport =
709 container_of(port, struct sa1100_port, port);
711 while (!(UART_GET_UTSR1(sport) & UTSR1_TNF))
713 UART_PUT_CHAR(sport, ch);
717 * Interrupts are disabled on entering
720 sa1100_console_write(struct console *co, const char *s, unsigned int count)
722 struct sa1100_port *sport = &sa1100_ports[co->index];
723 unsigned int old_utcr3, status;
726 * First, save UTCR3 and then disable interrupts
728 old_utcr3 = UART_GET_UTCR3(sport);
729 UART_PUT_UTCR3(sport, (old_utcr3 & ~(UTCR3_RIE | UTCR3_TIE)) |
732 uart_console_write(&sport->port, s, count, sa1100_console_putchar);
735 * Finally, wait for transmitter to become empty
739 status = UART_GET_UTSR1(sport);
740 } while (status & UTSR1_TBY);
741 UART_PUT_UTCR3(sport, old_utcr3);
745 * If the port was already initialised (eg, by a boot loader),
746 * try to determine the current setup.
749 sa1100_console_get_options(struct sa1100_port *sport, int *baud,
750 int *parity, int *bits)
754 utcr3 = UART_GET_UTCR3(sport) & (UTCR3_RXE | UTCR3_TXE);
755 if (utcr3 == (UTCR3_RXE | UTCR3_TXE)) {
756 /* ok, the port was enabled */
757 unsigned int utcr0, quot;
759 utcr0 = UART_GET_UTCR0(sport);
762 if (utcr0 & UTCR0_PE) {
763 if (utcr0 & UTCR0_OES)
769 if (utcr0 & UTCR0_DSS)
774 quot = UART_GET_UTCR2(sport) | UART_GET_UTCR1(sport) << 8;
776 *baud = sport->port.uartclk / (16 * (quot + 1));
781 sa1100_console_setup(struct console *co, char *options)
783 struct sa1100_port *sport;
790 * Check whether an invalid uart number has been specified, and
791 * if so, search for the first available port that does have
794 if (co->index == -1 || co->index >= NR_PORTS)
796 sport = &sa1100_ports[co->index];
799 uart_parse_options(options, &baud, &parity, &bits, &flow);
801 sa1100_console_get_options(sport, &baud, &parity, &bits);
803 return uart_set_options(&sport->port, co, baud, parity, bits, flow);
806 static struct uart_driver sa1100_reg;
807 static struct console sa1100_console = {
809 .write = sa1100_console_write,
810 .device = uart_console_device,
811 .setup = sa1100_console_setup,
812 .flags = CON_PRINTBUFFER,
817 static int __init sa1100_rs_console_init(void)
820 register_console(&sa1100_console);
823 console_initcall(sa1100_rs_console_init);
825 #define SA1100_CONSOLE &sa1100_console
827 #define SA1100_CONSOLE NULL
830 static struct uart_driver sa1100_reg = {
831 .owner = THIS_MODULE,
832 .driver_name = "ttySA",
834 .major = SERIAL_SA1100_MAJOR,
835 .minor = MINOR_START,
837 .cons = SA1100_CONSOLE,
840 static int sa1100_serial_suspend(struct platform_device *dev, pm_message_t state)
842 struct sa1100_port *sport = platform_get_drvdata(dev);
845 uart_suspend_port(&sa1100_reg, &sport->port);
850 static int sa1100_serial_resume(struct platform_device *dev)
852 struct sa1100_port *sport = platform_get_drvdata(dev);
855 uart_resume_port(&sa1100_reg, &sport->port);
860 static int sa1100_serial_probe(struct platform_device *dev)
862 struct resource *res = dev->resource;
865 for (i = 0; i < dev->num_resources; i++, res++)
866 if (res->flags & IORESOURCE_MEM)
869 if (i < dev->num_resources) {
870 for (i = 0; i < NR_PORTS; i++) {
871 if (sa1100_ports[i].port.mapbase != res->start)
874 sa1100_ports[i].port.dev = &dev->dev;
875 uart_add_one_port(&sa1100_reg, &sa1100_ports[i].port);
876 platform_set_drvdata(dev, &sa1100_ports[i]);
884 static int sa1100_serial_remove(struct platform_device *pdev)
886 struct sa1100_port *sport = platform_get_drvdata(pdev);
889 uart_remove_one_port(&sa1100_reg, &sport->port);
894 static struct platform_driver sa11x0_serial_driver = {
895 .probe = sa1100_serial_probe,
896 .remove = sa1100_serial_remove,
897 .suspend = sa1100_serial_suspend,
898 .resume = sa1100_serial_resume,
900 .name = "sa11x0-uart",
904 static int __init sa1100_serial_init(void)
908 printk(KERN_INFO "Serial: SA11x0 driver\n");
912 ret = uart_register_driver(&sa1100_reg);
914 ret = platform_driver_register(&sa11x0_serial_driver);
916 uart_unregister_driver(&sa1100_reg);
921 static void __exit sa1100_serial_exit(void)
923 platform_driver_unregister(&sa11x0_serial_driver);
924 uart_unregister_driver(&sa1100_reg);
927 module_init(sa1100_serial_init);
928 module_exit(sa1100_serial_exit);
930 MODULE_AUTHOR("Deep Blue Solutions Ltd");
931 MODULE_DESCRIPTION("SA1100 generic serial port driver");
932 MODULE_LICENSE("GPL");
933 MODULE_ALIAS_CHARDEV_MAJOR(SERIAL_SA1100_MAJOR);
934 MODULE_ALIAS("platform:sa11x0-uart");