2 * linux/drivers/char/sa1100.c
4 * Driver for SA11x0 serial ports
6 * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
8 * Copyright (C) 2000 Deep Blue Solutions Ltd.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 * $Id: sa1100.c,v 1.50 2002/07/29 14:41:04 rmk Exp $
27 #include <linux/config.h>
29 #if defined(CONFIG_SERIAL_SA1100_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
33 #include <linux/module.h>
34 #include <linux/ioport.h>
35 #include <linux/init.h>
36 #include <linux/console.h>
37 #include <linux/sysrq.h>
38 #include <linux/platform_device.h>
39 #include <linux/tty.h>
40 #include <linux/tty_flip.h>
41 #include <linux/serial_core.h>
42 #include <linux/serial.h>
46 #include <asm/hardware.h>
47 #include <asm/mach/serial_sa1100.h>
49 /* We've been assigned a range on the "Low-density serial ports" major */
50 #define SERIAL_SA1100_MAJOR 204
55 #define SA1100_ISR_PASS_LIMIT 256
58 * Convert from ignore_status_mask or read_status_mask to UTSR[01]
60 #define SM_TO_UTSR0(x) ((x) & 0xff)
61 #define SM_TO_UTSR1(x) ((x) >> 8)
62 #define UTSR0_TO_SM(x) ((x))
63 #define UTSR1_TO_SM(x) ((x) << 8)
65 #define UART_GET_UTCR0(sport) __raw_readl((sport)->port.membase + UTCR0)
66 #define UART_GET_UTCR1(sport) __raw_readl((sport)->port.membase + UTCR1)
67 #define UART_GET_UTCR2(sport) __raw_readl((sport)->port.membase + UTCR2)
68 #define UART_GET_UTCR3(sport) __raw_readl((sport)->port.membase + UTCR3)
69 #define UART_GET_UTSR0(sport) __raw_readl((sport)->port.membase + UTSR0)
70 #define UART_GET_UTSR1(sport) __raw_readl((sport)->port.membase + UTSR1)
71 #define UART_GET_CHAR(sport) __raw_readl((sport)->port.membase + UTDR)
73 #define UART_PUT_UTCR0(sport,v) __raw_writel((v),(sport)->port.membase + UTCR0)
74 #define UART_PUT_UTCR1(sport,v) __raw_writel((v),(sport)->port.membase + UTCR1)
75 #define UART_PUT_UTCR2(sport,v) __raw_writel((v),(sport)->port.membase + UTCR2)
76 #define UART_PUT_UTCR3(sport,v) __raw_writel((v),(sport)->port.membase + UTCR3)
77 #define UART_PUT_UTSR0(sport,v) __raw_writel((v),(sport)->port.membase + UTSR0)
78 #define UART_PUT_UTSR1(sport,v) __raw_writel((v),(sport)->port.membase + UTSR1)
79 #define UART_PUT_CHAR(sport,v) __raw_writel((v),(sport)->port.membase + UTDR)
82 * This is the size of our serial port register set.
84 #define UART_PORT_SIZE 0x24
87 * This determines how often we check the modem status signals
88 * for any change. They generally aren't connected to an IRQ
89 * so we have to poll them. We also check immediately before
90 * filling the TX fifo incase CTS has been dropped.
92 #define MCTRL_TIMEOUT (250*HZ/1000)
95 struct uart_port port;
96 struct timer_list timer;
97 unsigned int old_status;
101 * Handle any change of modem status signal since we were last called.
103 static void sa1100_mctrl_check(struct sa1100_port *sport)
105 unsigned int status, changed;
107 status = sport->port.ops->get_mctrl(&sport->port);
108 changed = status ^ sport->old_status;
113 sport->old_status = status;
115 if (changed & TIOCM_RI)
116 sport->port.icount.rng++;
117 if (changed & TIOCM_DSR)
118 sport->port.icount.dsr++;
119 if (changed & TIOCM_CAR)
120 uart_handle_dcd_change(&sport->port, status & TIOCM_CAR);
121 if (changed & TIOCM_CTS)
122 uart_handle_cts_change(&sport->port, status & TIOCM_CTS);
124 wake_up_interruptible(&sport->port.info->delta_msr_wait);
128 * This is our per-port timeout handler, for checking the
129 * modem status signals.
131 static void sa1100_timeout(unsigned long data)
133 struct sa1100_port *sport = (struct sa1100_port *)data;
136 if (sport->port.info) {
137 spin_lock_irqsave(&sport->port.lock, flags);
138 sa1100_mctrl_check(sport);
139 spin_unlock_irqrestore(&sport->port.lock, flags);
141 mod_timer(&sport->timer, jiffies + MCTRL_TIMEOUT);
146 * interrupts disabled on entry
148 static void sa1100_stop_tx(struct uart_port *port)
150 struct sa1100_port *sport = (struct sa1100_port *)port;
153 utcr3 = UART_GET_UTCR3(sport);
154 UART_PUT_UTCR3(sport, utcr3 & ~UTCR3_TIE);
155 sport->port.read_status_mask &= ~UTSR0_TO_SM(UTSR0_TFS);
159 * port locked and interrupts disabled
161 static void sa1100_start_tx(struct uart_port *port)
163 struct sa1100_port *sport = (struct sa1100_port *)port;
166 utcr3 = UART_GET_UTCR3(sport);
167 sport->port.read_status_mask |= UTSR0_TO_SM(UTSR0_TFS);
168 UART_PUT_UTCR3(sport, utcr3 | UTCR3_TIE);
174 static void sa1100_stop_rx(struct uart_port *port)
176 struct sa1100_port *sport = (struct sa1100_port *)port;
179 utcr3 = UART_GET_UTCR3(sport);
180 UART_PUT_UTCR3(sport, utcr3 & ~UTCR3_RIE);
184 * Set the modem control timer to fire immediately.
186 static void sa1100_enable_ms(struct uart_port *port)
188 struct sa1100_port *sport = (struct sa1100_port *)port;
190 mod_timer(&sport->timer, jiffies);
194 sa1100_rx_chars(struct sa1100_port *sport, struct pt_regs *regs)
196 struct tty_struct *tty = sport->port.info->tty;
197 unsigned int status, ch, flg;
199 status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) |
200 UTSR0_TO_SM(UART_GET_UTSR0(sport));
201 while (status & UTSR1_TO_SM(UTSR1_RNE)) {
202 ch = UART_GET_CHAR(sport);
204 sport->port.icount.rx++;
209 * note that the error handling code is
210 * out of the main execution path
212 if (status & UTSR1_TO_SM(UTSR1_PRE | UTSR1_FRE | UTSR1_ROR)) {
213 if (status & UTSR1_TO_SM(UTSR1_PRE))
214 sport->port.icount.parity++;
215 else if (status & UTSR1_TO_SM(UTSR1_FRE))
216 sport->port.icount.frame++;
217 if (status & UTSR1_TO_SM(UTSR1_ROR))
218 sport->port.icount.overrun++;
220 status &= sport->port.read_status_mask;
222 if (status & UTSR1_TO_SM(UTSR1_PRE))
224 else if (status & UTSR1_TO_SM(UTSR1_FRE))
228 sport->port.sysrq = 0;
232 if (uart_handle_sysrq_char(&sport->port, ch, regs))
235 uart_insert_char(&sport->port, status, UTSR1_TO_SM(UTSR1_ROR), ch, flg);
238 status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) |
239 UTSR0_TO_SM(UART_GET_UTSR0(sport));
241 tty_flip_buffer_push(tty);
244 static void sa1100_tx_chars(struct sa1100_port *sport)
246 struct circ_buf *xmit = &sport->port.info->xmit;
248 if (sport->port.x_char) {
249 UART_PUT_CHAR(sport, sport->port.x_char);
250 sport->port.icount.tx++;
251 sport->port.x_char = 0;
256 * Check the modem control lines before
257 * transmitting anything.
259 sa1100_mctrl_check(sport);
261 if (uart_circ_empty(xmit) || uart_tx_stopped(&sport->port)) {
262 sa1100_stop_tx(&sport->port);
267 * Tried using FIFO (not checking TNF) for fifo fill:
268 * still had the '4 bytes repeated' problem.
270 while (UART_GET_UTSR1(sport) & UTSR1_TNF) {
271 UART_PUT_CHAR(sport, xmit->buf[xmit->tail]);
272 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
273 sport->port.icount.tx++;
274 if (uart_circ_empty(xmit))
278 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
279 uart_write_wakeup(&sport->port);
281 if (uart_circ_empty(xmit))
282 sa1100_stop_tx(&sport->port);
285 static irqreturn_t sa1100_int(int irq, void *dev_id, struct pt_regs *regs)
287 struct sa1100_port *sport = dev_id;
288 unsigned int status, pass_counter = 0;
290 spin_lock(&sport->port.lock);
291 status = UART_GET_UTSR0(sport);
292 status &= SM_TO_UTSR0(sport->port.read_status_mask) | ~UTSR0_TFS;
294 if (status & (UTSR0_RFS | UTSR0_RID)) {
295 /* Clear the receiver idle bit, if set */
296 if (status & UTSR0_RID)
297 UART_PUT_UTSR0(sport, UTSR0_RID);
298 sa1100_rx_chars(sport, regs);
301 /* Clear the relevant break bits */
302 if (status & (UTSR0_RBB | UTSR0_REB))
303 UART_PUT_UTSR0(sport, status & (UTSR0_RBB | UTSR0_REB));
305 if (status & UTSR0_RBB)
306 sport->port.icount.brk++;
308 if (status & UTSR0_REB)
309 uart_handle_break(&sport->port);
311 if (status & UTSR0_TFS)
312 sa1100_tx_chars(sport);
313 if (pass_counter++ > SA1100_ISR_PASS_LIMIT)
315 status = UART_GET_UTSR0(sport);
316 status &= SM_TO_UTSR0(sport->port.read_status_mask) |
318 } while (status & (UTSR0_TFS | UTSR0_RFS | UTSR0_RID));
319 spin_unlock(&sport->port.lock);
325 * Return TIOCSER_TEMT when transmitter is not busy.
327 static unsigned int sa1100_tx_empty(struct uart_port *port)
329 struct sa1100_port *sport = (struct sa1100_port *)port;
331 return UART_GET_UTSR1(sport) & UTSR1_TBY ? 0 : TIOCSER_TEMT;
334 static unsigned int sa1100_get_mctrl(struct uart_port *port)
336 return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
339 static void sa1100_set_mctrl(struct uart_port *port, unsigned int mctrl)
344 * Interrupts always disabled.
346 static void sa1100_break_ctl(struct uart_port *port, int break_state)
348 struct sa1100_port *sport = (struct sa1100_port *)port;
352 spin_lock_irqsave(&sport->port.lock, flags);
353 utcr3 = UART_GET_UTCR3(sport);
354 if (break_state == -1)
358 UART_PUT_UTCR3(sport, utcr3);
359 spin_unlock_irqrestore(&sport->port.lock, flags);
362 static int sa1100_startup(struct uart_port *port)
364 struct sa1100_port *sport = (struct sa1100_port *)port;
370 retval = request_irq(sport->port.irq, sa1100_int, 0,
371 "sa11x0-uart", sport);
376 * Finally, clear and enable interrupts
378 UART_PUT_UTSR0(sport, -1);
379 UART_PUT_UTCR3(sport, UTCR3_RXE | UTCR3_TXE | UTCR3_RIE);
382 * Enable modem status interrupts
384 spin_lock_irq(&sport->port.lock);
385 sa1100_enable_ms(&sport->port);
386 spin_unlock_irq(&sport->port.lock);
391 static void sa1100_shutdown(struct uart_port *port)
393 struct sa1100_port *sport = (struct sa1100_port *)port;
398 del_timer_sync(&sport->timer);
403 free_irq(sport->port.irq, sport);
406 * Disable all interrupts, port and break condition.
408 UART_PUT_UTCR3(sport, 0);
412 sa1100_set_termios(struct uart_port *port, struct termios *termios,
415 struct sa1100_port *sport = (struct sa1100_port *)port;
417 unsigned int utcr0, old_utcr3, baud, quot;
418 unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8;
421 * We only support CS7 and CS8.
423 while ((termios->c_cflag & CSIZE) != CS7 &&
424 (termios->c_cflag & CSIZE) != CS8) {
425 termios->c_cflag &= ~CSIZE;
426 termios->c_cflag |= old_csize;
430 if ((termios->c_cflag & CSIZE) == CS8)
435 if (termios->c_cflag & CSTOPB)
437 if (termios->c_cflag & PARENB) {
439 if (!(termios->c_cflag & PARODD))
444 * Ask the core to calculate the divisor for us.
446 baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
447 quot = uart_get_divisor(port, baud);
449 spin_lock_irqsave(&sport->port.lock, flags);
451 sport->port.read_status_mask &= UTSR0_TO_SM(UTSR0_TFS);
452 sport->port.read_status_mask |= UTSR1_TO_SM(UTSR1_ROR);
453 if (termios->c_iflag & INPCK)
454 sport->port.read_status_mask |=
455 UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE);
456 if (termios->c_iflag & (BRKINT | PARMRK))
457 sport->port.read_status_mask |=
458 UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB);
461 * Characters to ignore
463 sport->port.ignore_status_mask = 0;
464 if (termios->c_iflag & IGNPAR)
465 sport->port.ignore_status_mask |=
466 UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE);
467 if (termios->c_iflag & IGNBRK) {
468 sport->port.ignore_status_mask |=
469 UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB);
471 * If we're ignoring parity and break indicators,
472 * ignore overruns too (for real raw support).
474 if (termios->c_iflag & IGNPAR)
475 sport->port.ignore_status_mask |=
476 UTSR1_TO_SM(UTSR1_ROR);
479 del_timer_sync(&sport->timer);
482 * Update the per-port timeout.
484 uart_update_timeout(port, termios->c_cflag, baud);
487 * disable interrupts and drain transmitter
489 old_utcr3 = UART_GET_UTCR3(sport);
490 UART_PUT_UTCR3(sport, old_utcr3 & ~(UTCR3_RIE | UTCR3_TIE));
492 while (UART_GET_UTSR1(sport) & UTSR1_TBY)
495 /* then, disable everything */
496 UART_PUT_UTCR3(sport, 0);
498 /* set the parity, stop bits and data size */
499 UART_PUT_UTCR0(sport, utcr0);
501 /* set the baud rate */
503 UART_PUT_UTCR1(sport, ((quot & 0xf00) >> 8));
504 UART_PUT_UTCR2(sport, (quot & 0xff));
506 UART_PUT_UTSR0(sport, -1);
508 UART_PUT_UTCR3(sport, old_utcr3);
510 if (UART_ENABLE_MS(&sport->port, termios->c_cflag))
511 sa1100_enable_ms(&sport->port);
513 spin_unlock_irqrestore(&sport->port.lock, flags);
516 static const char *sa1100_type(struct uart_port *port)
518 struct sa1100_port *sport = (struct sa1100_port *)port;
520 return sport->port.type == PORT_SA1100 ? "SA1100" : NULL;
524 * Release the memory region(s) being used by 'port'.
526 static void sa1100_release_port(struct uart_port *port)
528 struct sa1100_port *sport = (struct sa1100_port *)port;
530 release_mem_region(sport->port.mapbase, UART_PORT_SIZE);
534 * Request the memory region(s) being used by 'port'.
536 static int sa1100_request_port(struct uart_port *port)
538 struct sa1100_port *sport = (struct sa1100_port *)port;
540 return request_mem_region(sport->port.mapbase, UART_PORT_SIZE,
541 "sa11x0-uart") != NULL ? 0 : -EBUSY;
545 * Configure/autoconfigure the port.
547 static void sa1100_config_port(struct uart_port *port, int flags)
549 struct sa1100_port *sport = (struct sa1100_port *)port;
551 if (flags & UART_CONFIG_TYPE &&
552 sa1100_request_port(&sport->port) == 0)
553 sport->port.type = PORT_SA1100;
557 * Verify the new serial_struct (for TIOCSSERIAL).
558 * The only change we allow are to the flags and type, and
559 * even then only between PORT_SA1100 and PORT_UNKNOWN
562 sa1100_verify_port(struct uart_port *port, struct serial_struct *ser)
564 struct sa1100_port *sport = (struct sa1100_port *)port;
567 if (ser->type != PORT_UNKNOWN && ser->type != PORT_SA1100)
569 if (sport->port.irq != ser->irq)
571 if (ser->io_type != SERIAL_IO_MEM)
573 if (sport->port.uartclk / 16 != ser->baud_base)
575 if ((void *)sport->port.mapbase != ser->iomem_base)
577 if (sport->port.iobase != ser->port)
584 static struct uart_ops sa1100_pops = {
585 .tx_empty = sa1100_tx_empty,
586 .set_mctrl = sa1100_set_mctrl,
587 .get_mctrl = sa1100_get_mctrl,
588 .stop_tx = sa1100_stop_tx,
589 .start_tx = sa1100_start_tx,
590 .stop_rx = sa1100_stop_rx,
591 .enable_ms = sa1100_enable_ms,
592 .break_ctl = sa1100_break_ctl,
593 .startup = sa1100_startup,
594 .shutdown = sa1100_shutdown,
595 .set_termios = sa1100_set_termios,
597 .release_port = sa1100_release_port,
598 .request_port = sa1100_request_port,
599 .config_port = sa1100_config_port,
600 .verify_port = sa1100_verify_port,
603 static struct sa1100_port sa1100_ports[NR_PORTS];
606 * Setup the SA1100 serial ports. Note that we don't include the IrDA
607 * port here since we have our own SIR/FIR driver (see drivers/net/irda)
609 * Note also that we support "console=ttySAx" where "x" is either 0 or 1.
610 * Which serial port this ends up being depends on the machine you're
611 * running this kernel on. I'm not convinced that this is a good idea,
612 * but that's the way it traditionally works.
614 * Note that NanoEngine UART3 becomes UART2, and UART2 is no longer
617 static void __init sa1100_init_ports(void)
619 static int first = 1;
626 for (i = 0; i < NR_PORTS; i++) {
627 sa1100_ports[i].port.uartclk = 3686400;
628 sa1100_ports[i].port.ops = &sa1100_pops;
629 sa1100_ports[i].port.fifosize = 8;
630 sa1100_ports[i].port.line = i;
631 sa1100_ports[i].port.iotype = SERIAL_IO_MEM;
632 init_timer(&sa1100_ports[i].timer);
633 sa1100_ports[i].timer.function = sa1100_timeout;
634 sa1100_ports[i].timer.data = (unsigned long)&sa1100_ports[i];
638 * make transmit lines outputs, so that when the port
639 * is closed, the output is in the MARK state.
641 PPDR |= PPC_TXD1 | PPC_TXD3;
642 PPSR |= PPC_TXD1 | PPC_TXD3;
645 void __init sa1100_register_uart_fns(struct sa1100_port_fns *fns)
648 sa1100_pops.get_mctrl = fns->get_mctrl;
650 sa1100_pops.set_mctrl = fns->set_mctrl;
652 sa1100_pops.pm = fns->pm;
653 sa1100_pops.set_wake = fns->set_wake;
656 void __init sa1100_register_uart(int idx, int port)
658 if (idx >= NR_PORTS) {
659 printk(KERN_ERR "%s: bad index number %d\n", __FUNCTION__, idx);
665 sa1100_ports[idx].port.membase = (void __iomem *)&Ser1UTCR0;
666 sa1100_ports[idx].port.mapbase = _Ser1UTCR0;
667 sa1100_ports[idx].port.irq = IRQ_Ser1UART;
668 sa1100_ports[idx].port.flags = UPF_BOOT_AUTOCONF;
672 sa1100_ports[idx].port.membase = (void __iomem *)&Ser2UTCR0;
673 sa1100_ports[idx].port.mapbase = _Ser2UTCR0;
674 sa1100_ports[idx].port.irq = IRQ_Ser2ICP;
675 sa1100_ports[idx].port.flags = UPF_BOOT_AUTOCONF;
679 sa1100_ports[idx].port.membase = (void __iomem *)&Ser3UTCR0;
680 sa1100_ports[idx].port.mapbase = _Ser3UTCR0;
681 sa1100_ports[idx].port.irq = IRQ_Ser3UART;
682 sa1100_ports[idx].port.flags = UPF_BOOT_AUTOCONF;
686 printk(KERN_ERR "%s: bad port number %d\n", __FUNCTION__, port);
691 #ifdef CONFIG_SERIAL_SA1100_CONSOLE
694 * Interrupts are disabled on entering
697 sa1100_console_write(struct console *co, const char *s, unsigned int count)
699 struct sa1100_port *sport = &sa1100_ports[co->index];
700 unsigned int old_utcr3, status, i;
703 * First, save UTCR3 and then disable interrupts
705 old_utcr3 = UART_GET_UTCR3(sport);
706 UART_PUT_UTCR3(sport, (old_utcr3 & ~(UTCR3_RIE | UTCR3_TIE)) |
710 * Now, do each character
712 for (i = 0; i < count; i++) {
714 status = UART_GET_UTSR1(sport);
715 } while (!(status & UTSR1_TNF));
716 UART_PUT_CHAR(sport, s[i]);
719 status = UART_GET_UTSR1(sport);
720 } while (!(status & UTSR1_TNF));
721 UART_PUT_CHAR(sport, '\r');
726 * Finally, wait for transmitter to become empty
730 status = UART_GET_UTSR1(sport);
731 } while (status & UTSR1_TBY);
732 UART_PUT_UTCR3(sport, old_utcr3);
736 * If the port was already initialised (eg, by a boot loader),
737 * try to determine the current setup.
740 sa1100_console_get_options(struct sa1100_port *sport, int *baud,
741 int *parity, int *bits)
745 utcr3 = UART_GET_UTCR3(sport) & (UTCR3_RXE | UTCR3_TXE);
746 if (utcr3 == (UTCR3_RXE | UTCR3_TXE)) {
747 /* ok, the port was enabled */
748 unsigned int utcr0, quot;
750 utcr0 = UART_GET_UTCR0(sport);
753 if (utcr0 & UTCR0_PE) {
754 if (utcr0 & UTCR0_OES)
760 if (utcr0 & UTCR0_DSS)
765 quot = UART_GET_UTCR2(sport) | UART_GET_UTCR1(sport) << 8;
767 *baud = sport->port.uartclk / (16 * (quot + 1));
772 sa1100_console_setup(struct console *co, char *options)
774 struct sa1100_port *sport;
781 * Check whether an invalid uart number has been specified, and
782 * if so, search for the first available port that does have
785 if (co->index == -1 || co->index >= NR_PORTS)
787 sport = &sa1100_ports[co->index];
790 uart_parse_options(options, &baud, &parity, &bits, &flow);
792 sa1100_console_get_options(sport, &baud, &parity, &bits);
794 return uart_set_options(&sport->port, co, baud, parity, bits, flow);
797 static struct uart_driver sa1100_reg;
798 static struct console sa1100_console = {
800 .write = sa1100_console_write,
801 .device = uart_console_device,
802 .setup = sa1100_console_setup,
803 .flags = CON_PRINTBUFFER,
808 static int __init sa1100_rs_console_init(void)
811 register_console(&sa1100_console);
814 console_initcall(sa1100_rs_console_init);
816 #define SA1100_CONSOLE &sa1100_console
818 #define SA1100_CONSOLE NULL
821 static struct uart_driver sa1100_reg = {
822 .owner = THIS_MODULE,
823 .driver_name = "ttySA",
825 .devfs_name = "ttySA",
826 .major = SERIAL_SA1100_MAJOR,
827 .minor = MINOR_START,
829 .cons = SA1100_CONSOLE,
832 static int sa1100_serial_suspend(struct platform_device *dev, pm_message_t state)
834 struct sa1100_port *sport = platform_get_drvdata(dev);
837 uart_suspend_port(&sa1100_reg, &sport->port);
842 static int sa1100_serial_resume(struct platform_device *dev)
844 struct sa1100_port *sport = platform_get_drvdata(dev);
847 uart_resume_port(&sa1100_reg, &sport->port);
852 static int sa1100_serial_probe(struct platform_device *dev)
854 struct resource *res = dev->resource;
857 for (i = 0; i < dev->num_resources; i++, res++)
858 if (res->flags & IORESOURCE_MEM)
861 if (i < dev->num_resources) {
862 for (i = 0; i < NR_PORTS; i++) {
863 if (sa1100_ports[i].port.mapbase != res->start)
866 sa1100_ports[i].port.dev = &dev->dev;
867 uart_add_one_port(&sa1100_reg, &sa1100_ports[i].port);
868 platform_set_drvdata(dev, &sa1100_ports[i]);
876 static int sa1100_serial_remove(struct platform_device *pdev)
878 struct sa1100_port *sport = platform_get_drvdata(pdev);
880 platform_set_drvdata(pdev, NULL);
883 uart_remove_one_port(&sa1100_reg, &sport->port);
888 static struct platform_driver sa11x0_serial_driver = {
889 .probe = sa1100_serial_probe,
890 .remove = sa1100_serial_remove,
891 .suspend = sa1100_serial_suspend,
892 .resume = sa1100_serial_resume,
894 .name = "sa11x0-uart",
898 static int __init sa1100_serial_init(void)
902 printk(KERN_INFO "Serial: SA11x0 driver $Revision: 1.50 $\n");
906 ret = uart_register_driver(&sa1100_reg);
908 ret = platform_driver_register(&sa11x0_serial_driver);
910 uart_unregister_driver(&sa1100_reg);
915 static void __exit sa1100_serial_exit(void)
917 platform_driver_unregister(&sa11x0_serial_driver);
918 uart_unregister_driver(&sa1100_reg);
921 module_init(sa1100_serial_init);
922 module_exit(sa1100_serial_exit);
924 MODULE_AUTHOR("Deep Blue Solutions Ltd");
925 MODULE_DESCRIPTION("SA1100 generic serial port driver $Revision: 1.50 $");
926 MODULE_LICENSE("GPL");
927 MODULE_ALIAS_CHARDEV_MAJOR(SERIAL_SA1100_MAJOR);