2 * Serial driver for the amiga builtin port.
4 * This code was created by taking serial.c version 4.30 from kernel
5 * release 2.3.22, replacing all hardware related stuff with the
6 * corresponding amiga hardware actions, and removing all irrelevant
7 * code. As a consequence, it uses many of the constants and names
8 * associated with the registers and bits of 16550 compatible UARTS -
9 * but only to keep track of status, etc in the state variables. It
10 * was done this was to make it easier to keep the code in line with
11 * (non hardware specific) changes to serial.c.
13 * The port is registered with the tty driver as minor device 64, and
14 * therefore other ports should should only use 65 upwards.
16 * Richard Lucock 28/12/99
18 * Copyright (C) 1991, 1992 Linus Torvalds
19 * Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997,
20 * 1998, 1999 Theodore Ts'o
25 * Serial driver configuration section. Here are the various options:
27 * SERIAL_PARANOIA_CHECK
28 * Check the magic number for the async_structure where
32 #include <linux/delay.h>
34 #undef SERIAL_PARANOIA_CHECK
35 #define SERIAL_DO_RESTART
37 /* Set of debugging defines */
39 #undef SERIAL_DEBUG_INTR
40 #undef SERIAL_DEBUG_OPEN
41 #undef SERIAL_DEBUG_FLOW
42 #undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
46 #if defined(MODULE) && defined(SERIAL_DEBUG_MCOUNT)
47 #define DBG_CNT(s) printk("(%s): [%x] refc=%d, serc=%d, ttyc=%d -> %s\n", \
48 tty->name, (info->tport.flags), serial_driver->refcount,info->count,tty->count,s)
54 * End of serial driver configuration section.
57 #include <linux/module.h>
59 #include <linux/types.h>
60 #include <linux/serial.h>
61 #include <linux/serial_reg.h>
62 static char *serial_version = "4.30";
64 #include <linux/errno.h>
65 #include <linux/signal.h>
66 #include <linux/sched.h>
67 #include <linux/kernel.h>
68 #include <linux/timer.h>
69 #include <linux/interrupt.h>
70 #include <linux/tty.h>
71 #include <linux/tty_flip.h>
72 #include <linux/circ_buf.h>
73 #include <linux/console.h>
74 #include <linux/major.h>
75 #include <linux/string.h>
76 #include <linux/fcntl.h>
77 #include <linux/ptrace.h>
78 #include <linux/ioport.h>
80 #include <linux/seq_file.h>
81 #include <linux/slab.h>
82 #include <linux/init.h>
83 #include <linux/bitops.h>
84 #include <linux/platform_device.h>
86 #include <asm/setup.h>
91 #include <asm/amigahw.h>
92 #include <asm/amigaints.h>
95 struct tty_port tport;
97 struct async_icount icount;
103 int read_status_mask;
104 int ignore_status_mask;
107 int IER; /* Interrupt Enable Register */
108 int MCR; /* Modem control register */
109 int x_char; /* xon/xoff character */
112 #define custom amiga_custom
113 static char *serial_name = "Amiga-builtin serial driver";
115 static struct tty_driver *serial_driver;
117 /* number of characters left in xmit buffer before we ask for more */
118 #define WAKEUP_CHARS 256
120 static unsigned char current_ctl_bits;
122 static void change_speed(struct tty_struct *tty, struct serial_state *info,
123 struct ktermios *old);
124 static void rs_wait_until_sent(struct tty_struct *tty, int timeout);
127 static struct serial_state rs_table[1];
129 #define NR_PORTS ARRAY_SIZE(rs_table)
131 #include <asm/uaccess.h>
133 #define serial_isroot() (capable(CAP_SYS_ADMIN))
136 static inline int serial_paranoia_check(struct serial_state *info,
137 char *name, const char *routine)
139 #ifdef SERIAL_PARANOIA_CHECK
140 static const char *badmagic =
141 "Warning: bad magic number for serial struct (%s) in %s\n";
142 static const char *badinfo =
143 "Warning: null async_struct for (%s) in %s\n";
146 printk(badinfo, name, routine);
149 if (info->magic != SERIAL_MAGIC) {
150 printk(badmagic, name, routine);
157 /* some serial hardware definitions */
158 #define SDR_OVRUN (1<<15)
159 #define SDR_RBF (1<<14)
160 #define SDR_TBE (1<<13)
161 #define SDR_TSRE (1<<12)
163 #define SERPER_PARENB (1<<15)
165 #define AC_SETCLR (1<<15)
166 #define AC_UARTBRK (1<<11)
168 #define SER_DTR (1<<7)
169 #define SER_RTS (1<<6)
170 #define SER_DCD (1<<5)
171 #define SER_CTS (1<<4)
172 #define SER_DSR (1<<3)
174 static __inline__ void rtsdtr_ctrl(int bits)
176 ciab.pra = ((bits & (SER_RTS | SER_DTR)) ^ (SER_RTS | SER_DTR)) | (ciab.pra & ~(SER_RTS | SER_DTR));
180 * ------------------------------------------------------------
181 * rs_stop() and rs_start()
183 * This routines are called before setting or resetting tty->stopped.
184 * They enable or disable transmitter interrupts, as necessary.
185 * ------------------------------------------------------------
187 static void rs_stop(struct tty_struct *tty)
189 struct serial_state *info = tty->driver_data;
192 if (serial_paranoia_check(info, tty->name, "rs_stop"))
195 local_irq_save(flags);
196 if (info->IER & UART_IER_THRI) {
197 info->IER &= ~UART_IER_THRI;
198 /* disable Tx interrupt and remove any pending interrupts */
199 custom.intena = IF_TBE;
201 custom.intreq = IF_TBE;
204 local_irq_restore(flags);
207 static void rs_start(struct tty_struct *tty)
209 struct serial_state *info = tty->driver_data;
212 if (serial_paranoia_check(info, tty->name, "rs_start"))
215 local_irq_save(flags);
216 if (info->xmit.head != info->xmit.tail
218 && !(info->IER & UART_IER_THRI)) {
219 info->IER |= UART_IER_THRI;
220 custom.intena = IF_SETCLR | IF_TBE;
222 /* set a pending Tx Interrupt, transmitter should restart now */
223 custom.intreq = IF_SETCLR | IF_TBE;
226 local_irq_restore(flags);
230 * ----------------------------------------------------------------------
232 * Here starts the interrupt handling routines. All of the following
233 * subroutines are declared as inline and are folded into
234 * rs_interrupt(). They were separated out for readability's sake.
236 * Note: rs_interrupt() is a "fast" interrupt, which means that it
237 * runs with interrupts turned off. People who may want to modify
238 * rs_interrupt() should try to keep the interrupt handler as fast as
239 * possible. After you are done making modifications, it is not a bad
242 * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
244 * and look at the resulting assemble code in serial.s.
246 * - Ted Ts'o (tytso@mit.edu), 7-Mar-93
247 * -----------------------------------------------------------------------
250 static void receive_chars(struct serial_state *info)
254 unsigned char ch, flag;
255 struct async_icount *icount;
258 icount = &info->icount;
260 status = UART_LSR_DR; /* We obviously have a character! */
261 serdatr = custom.serdatr;
263 custom.intreq = IF_RBF;
266 if((serdatr & 0x1ff) == 0)
267 status |= UART_LSR_BI;
268 if(serdatr & SDR_OVRUN)
269 status |= UART_LSR_OE;
274 #ifdef SERIAL_DEBUG_INTR
275 printk("DR%02x:%02x...", ch, status);
280 * We don't handle parity or frame errors - but I have left
281 * the code in, since I'm not sure that the errors can't be
285 if (status & (UART_LSR_BI | UART_LSR_PE |
286 UART_LSR_FE | UART_LSR_OE)) {
288 * For statistics only
290 if (status & UART_LSR_BI) {
291 status &= ~(UART_LSR_FE | UART_LSR_PE);
293 } else if (status & UART_LSR_PE)
295 else if (status & UART_LSR_FE)
297 if (status & UART_LSR_OE)
301 * Now check to see if character should be
302 * ignored, and mask off conditions which
305 if (status & info->ignore_status_mask)
308 status &= info->read_status_mask;
310 if (status & (UART_LSR_BI)) {
311 #ifdef SERIAL_DEBUG_INTR
312 printk("handling break....");
315 if (info->tport.flags & ASYNC_SAK)
316 do_SAK(info->tport.tty);
317 } else if (status & UART_LSR_PE)
319 else if (status & UART_LSR_FE)
321 if (status & UART_LSR_OE) {
323 * Overrun is special, since it's
324 * reported immediately, and doesn't
325 * affect the current character
330 tty_insert_flip_char(&info->tport, ch, flag);
332 tty_insert_flip_char(&info->tport, 0, TTY_OVERRUN);
333 tty_flip_buffer_push(&info->tport);
338 static void transmit_chars(struct serial_state *info)
340 custom.intreq = IF_TBE;
343 custom.serdat = info->x_char | 0x100;
349 if (info->xmit.head == info->xmit.tail
350 || info->tport.tty->stopped
351 || info->tport.tty->hw_stopped) {
352 info->IER &= ~UART_IER_THRI;
353 custom.intena = IF_TBE;
358 custom.serdat = info->xmit.buf[info->xmit.tail++] | 0x100;
360 info->xmit.tail = info->xmit.tail & (SERIAL_XMIT_SIZE-1);
363 if (CIRC_CNT(info->xmit.head,
365 SERIAL_XMIT_SIZE) < WAKEUP_CHARS)
366 tty_wakeup(info->tport.tty);
368 #ifdef SERIAL_DEBUG_INTR
371 if (info->xmit.head == info->xmit.tail) {
372 custom.intena = IF_TBE;
374 info->IER &= ~UART_IER_THRI;
378 static void check_modem_status(struct serial_state *info)
380 struct tty_port *port = &info->tport;
381 unsigned char status = ciab.pra & (SER_DCD | SER_CTS | SER_DSR);
382 unsigned char dstatus;
383 struct async_icount *icount;
385 /* Determine bits that have changed */
386 dstatus = status ^ current_ctl_bits;
387 current_ctl_bits = status;
390 icount = &info->icount;
391 /* update input line counters */
392 if (dstatus & SER_DSR)
394 if (dstatus & SER_DCD) {
396 #ifdef CONFIG_HARD_PPS
397 if ((port->flags & ASYNC_HARDPPS_CD) &&
402 if (dstatus & SER_CTS)
404 wake_up_interruptible(&port->delta_msr_wait);
407 if ((port->flags & ASYNC_CHECK_CD) && (dstatus & SER_DCD)) {
408 #if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
409 printk("ttyS%d CD now %s...", info->line,
410 (!(status & SER_DCD)) ? "on" : "off");
412 if (!(status & SER_DCD))
413 wake_up_interruptible(&port->open_wait);
415 #ifdef SERIAL_DEBUG_OPEN
416 printk("doing serial hangup...");
419 tty_hangup(port->tty);
422 if (tty_port_cts_enabled(port)) {
423 if (port->tty->hw_stopped) {
424 if (!(status & SER_CTS)) {
425 #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
426 printk("CTS tx start...");
428 port->tty->hw_stopped = 0;
429 info->IER |= UART_IER_THRI;
430 custom.intena = IF_SETCLR | IF_TBE;
432 /* set a pending Tx Interrupt, transmitter should restart now */
433 custom.intreq = IF_SETCLR | IF_TBE;
435 tty_wakeup(port->tty);
439 if ((status & SER_CTS)) {
440 #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
441 printk("CTS tx stop...");
443 port->tty->hw_stopped = 1;
444 info->IER &= ~UART_IER_THRI;
445 /* disable Tx interrupt and remove any pending interrupts */
446 custom.intena = IF_TBE;
448 custom.intreq = IF_TBE;
455 static irqreturn_t ser_vbl_int( int irq, void *data)
457 /* vbl is just a periodic interrupt we tie into to update modem status */
458 struct serial_state *info = data;
460 * TBD - is it better to unregister from this interrupt or to
461 * ignore it if MSI is clear ?
463 if(info->IER & UART_IER_MSI)
464 check_modem_status(info);
468 static irqreturn_t ser_rx_int(int irq, void *dev_id)
470 struct serial_state *info = dev_id;
472 #ifdef SERIAL_DEBUG_INTR
473 printk("ser_rx_int...");
476 if (!info->tport.tty)
480 #ifdef SERIAL_DEBUG_INTR
486 static irqreturn_t ser_tx_int(int irq, void *dev_id)
488 struct serial_state *info = dev_id;
490 if (custom.serdatr & SDR_TBE) {
491 #ifdef SERIAL_DEBUG_INTR
492 printk("ser_tx_int...");
495 if (!info->tport.tty)
498 transmit_chars(info);
499 #ifdef SERIAL_DEBUG_INTR
507 * -------------------------------------------------------------------
508 * Here ends the serial interrupt routines.
509 * -------------------------------------------------------------------
513 * ---------------------------------------------------------------
514 * Low level utility subroutines for the serial driver: routines to
515 * figure out the appropriate timeout for an interrupt chain, routines
516 * to initialize and startup a serial port, and routines to shutdown a
517 * serial port. Useful stuff like that.
518 * ---------------------------------------------------------------
521 static int startup(struct tty_struct *tty, struct serial_state *info)
523 struct tty_port *port = &info->tport;
528 page = get_zeroed_page(GFP_KERNEL);
532 local_irq_save(flags);
534 if (port->flags & ASYNC_INITIALIZED) {
542 info->xmit.buf = (unsigned char *) page;
544 #ifdef SERIAL_DEBUG_OPEN
545 printk("starting up ttys%d ...", info->line);
548 /* Clear anything in the input buffer */
550 custom.intreq = IF_RBF;
553 retval = request_irq(IRQ_AMIGA_VERTB, ser_vbl_int, 0, "serial status", info);
555 if (serial_isroot()) {
556 set_bit(TTY_IO_ERROR, &tty->flags);
562 /* enable both Rx and Tx interrupts */
563 custom.intena = IF_SETCLR | IF_RBF | IF_TBE;
565 info->IER = UART_IER_MSI;
567 /* remember current state of the DCD and CTS bits */
568 current_ctl_bits = ciab.pra & (SER_DCD | SER_CTS | SER_DSR);
572 info->MCR = SER_DTR | SER_RTS;
573 rtsdtr_ctrl(info->MCR);
575 clear_bit(TTY_IO_ERROR, &tty->flags);
576 info->xmit.head = info->xmit.tail = 0;
579 * Set up the tty->alt_speed kludge
581 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
582 tty->alt_speed = 57600;
583 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
584 tty->alt_speed = 115200;
585 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
586 tty->alt_speed = 230400;
587 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
588 tty->alt_speed = 460800;
591 * and set the speed of the serial port
593 change_speed(tty, info, NULL);
595 port->flags |= ASYNC_INITIALIZED;
596 local_irq_restore(flags);
600 local_irq_restore(flags);
605 * This routine will shutdown a serial port; interrupts are disabled, and
606 * DTR is dropped if the hangup on close termio flag is on.
608 static void shutdown(struct tty_struct *tty, struct serial_state *info)
611 struct serial_state *state;
613 if (!(info->tport.flags & ASYNC_INITIALIZED))
618 #ifdef SERIAL_DEBUG_OPEN
619 printk("Shutting down serial port %d ....\n", info->line);
622 local_irq_save(flags); /* Disable interrupts */
625 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
626 * here so the queue might never be waken up
628 wake_up_interruptible(&info->tport.delta_msr_wait);
631 * Free the IRQ, if necessary
633 free_irq(IRQ_AMIGA_VERTB, info);
635 if (info->xmit.buf) {
636 free_page((unsigned long) info->xmit.buf);
637 info->xmit.buf = NULL;
641 custom.intena = IF_RBF | IF_TBE;
644 /* disable break condition */
645 custom.adkcon = AC_UARTBRK;
648 if (tty->termios.c_cflag & HUPCL)
649 info->MCR &= ~(SER_DTR|SER_RTS);
650 rtsdtr_ctrl(info->MCR);
652 set_bit(TTY_IO_ERROR, &tty->flags);
654 info->tport.flags &= ~ASYNC_INITIALIZED;
655 local_irq_restore(flags);
660 * This routine is called to set the UART divisor registers to match
661 * the specified baud rate for a serial port.
663 static void change_speed(struct tty_struct *tty, struct serial_state *info,
664 struct ktermios *old_termios)
666 struct tty_port *port = &info->tport;
667 int quot = 0, baud_base, baud;
668 unsigned cflag, cval = 0;
672 cflag = tty->termios.c_cflag;
674 /* Byte size is always 8 bits plus parity bit if requested */
677 if (cflag & CSTOPB) {
681 if (cflag & PARENB) {
682 cval |= UART_LCR_PARITY;
685 if (!(cflag & PARODD))
686 cval |= UART_LCR_EPAR;
689 cval |= UART_LCR_SPAR;
692 /* Determine divisor based on baud rate */
693 baud = tty_get_baud_rate(tty);
695 baud = 9600; /* B0 transition handled in rs_set_termios */
696 baud_base = info->baud_base;
697 if (baud == 38400 && (port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
698 quot = info->custom_divisor;
701 /* Special case since 134 is really 134.5 */
702 quot = (2*baud_base / 269);
704 quot = baud_base / baud;
706 /* If the quotient is zero refuse the change */
707 if (!quot && old_termios) {
708 /* FIXME: Will need updating for new tty in the end */
709 tty->termios.c_cflag &= ~CBAUD;
710 tty->termios.c_cflag |= (old_termios->c_cflag & CBAUD);
711 baud = tty_get_baud_rate(tty);
715 (port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
716 quot = info->custom_divisor;
719 /* Special case since 134 is really 134.5 */
720 quot = (2*baud_base / 269);
722 quot = baud_base / baud;
725 /* As a last resort, if the quotient is zero, default to 9600 bps */
727 quot = baud_base / 9600;
729 info->timeout = ((info->xmit_fifo_size*HZ*bits*quot) / baud_base);
730 info->timeout += HZ/50; /* Add .02 seconds of slop */
732 /* CTS flow control flag and modem status interrupts */
733 info->IER &= ~UART_IER_MSI;
734 if (port->flags & ASYNC_HARDPPS_CD)
735 info->IER |= UART_IER_MSI;
736 if (cflag & CRTSCTS) {
737 port->flags |= ASYNC_CTS_FLOW;
738 info->IER |= UART_IER_MSI;
740 port->flags &= ~ASYNC_CTS_FLOW;
742 port->flags &= ~ASYNC_CHECK_CD;
744 port->flags |= ASYNC_CHECK_CD;
745 info->IER |= UART_IER_MSI;
748 * Does clearing IER_MSI imply that we should disable the VBL interrupt ?
752 * Set up parity check flag
755 info->read_status_mask = UART_LSR_OE | UART_LSR_DR;
757 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
758 if (I_BRKINT(tty) || I_PARMRK(tty))
759 info->read_status_mask |= UART_LSR_BI;
762 * Characters to ignore
764 info->ignore_status_mask = 0;
766 info->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
768 info->ignore_status_mask |= UART_LSR_BI;
770 * If we're ignore parity and break indicators, ignore
771 * overruns too. (For real raw support).
774 info->ignore_status_mask |= UART_LSR_OE;
777 * !!! ignore all characters if CREAD is not set
779 if ((cflag & CREAD) == 0)
780 info->ignore_status_mask |= UART_LSR_DR;
781 local_irq_save(flags);
786 /* Set up the baud rate */
789 /* Enable or disable parity bit */
791 if(cval & UART_LCR_PARITY)
792 serper |= (SERPER_PARENB);
794 custom.serper = serper;
798 local_irq_restore(flags);
801 static int rs_put_char(struct tty_struct *tty, unsigned char ch)
803 struct serial_state *info;
806 info = tty->driver_data;
808 if (serial_paranoia_check(info, tty->name, "rs_put_char"))
814 local_irq_save(flags);
815 if (CIRC_SPACE(info->xmit.head,
817 SERIAL_XMIT_SIZE) == 0) {
818 local_irq_restore(flags);
822 info->xmit.buf[info->xmit.head++] = ch;
823 info->xmit.head &= SERIAL_XMIT_SIZE-1;
824 local_irq_restore(flags);
828 static void rs_flush_chars(struct tty_struct *tty)
830 struct serial_state *info = tty->driver_data;
833 if (serial_paranoia_check(info, tty->name, "rs_flush_chars"))
836 if (info->xmit.head == info->xmit.tail
842 local_irq_save(flags);
843 info->IER |= UART_IER_THRI;
844 custom.intena = IF_SETCLR | IF_TBE;
846 /* set a pending Tx Interrupt, transmitter should restart now */
847 custom.intreq = IF_SETCLR | IF_TBE;
849 local_irq_restore(flags);
852 static int rs_write(struct tty_struct * tty, const unsigned char *buf, int count)
855 struct serial_state *info = tty->driver_data;
858 if (serial_paranoia_check(info, tty->name, "rs_write"))
864 local_irq_save(flags);
866 c = CIRC_SPACE_TO_END(info->xmit.head,
874 memcpy(info->xmit.buf + info->xmit.head, buf, c);
875 info->xmit.head = ((info->xmit.head + c) &
876 (SERIAL_XMIT_SIZE-1));
881 local_irq_restore(flags);
883 if (info->xmit.head != info->xmit.tail
886 && !(info->IER & UART_IER_THRI)) {
887 info->IER |= UART_IER_THRI;
889 custom.intena = IF_SETCLR | IF_TBE;
891 /* set a pending Tx Interrupt, transmitter should restart now */
892 custom.intreq = IF_SETCLR | IF_TBE;
894 local_irq_restore(flags);
899 static int rs_write_room(struct tty_struct *tty)
901 struct serial_state *info = tty->driver_data;
903 if (serial_paranoia_check(info, tty->name, "rs_write_room"))
905 return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
908 static int rs_chars_in_buffer(struct tty_struct *tty)
910 struct serial_state *info = tty->driver_data;
912 if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer"))
914 return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
917 static void rs_flush_buffer(struct tty_struct *tty)
919 struct serial_state *info = tty->driver_data;
922 if (serial_paranoia_check(info, tty->name, "rs_flush_buffer"))
924 local_irq_save(flags);
925 info->xmit.head = info->xmit.tail = 0;
926 local_irq_restore(flags);
931 * This function is used to send a high-priority XON/XOFF character to
934 static void rs_send_xchar(struct tty_struct *tty, char ch)
936 struct serial_state *info = tty->driver_data;
939 if (serial_paranoia_check(info, tty->name, "rs_send_char"))
944 /* Make sure transmit interrupts are on */
947 local_irq_save(flags);
948 if(!(custom.intenar & IF_TBE)) {
949 custom.intena = IF_SETCLR | IF_TBE;
951 /* set a pending Tx Interrupt, transmitter should restart now */
952 custom.intreq = IF_SETCLR | IF_TBE;
955 local_irq_restore(flags);
957 info->IER |= UART_IER_THRI;
962 * ------------------------------------------------------------
965 * This routine is called by the upper-layer tty layer to signal that
966 * incoming characters should be throttled.
967 * ------------------------------------------------------------
969 static void rs_throttle(struct tty_struct * tty)
971 struct serial_state *info = tty->driver_data;
973 #ifdef SERIAL_DEBUG_THROTTLE
976 printk("throttle %s: %d....\n", tty_name(tty, buf),
977 tty->ldisc.chars_in_buffer(tty));
980 if (serial_paranoia_check(info, tty->name, "rs_throttle"))
984 rs_send_xchar(tty, STOP_CHAR(tty));
986 if (tty->termios.c_cflag & CRTSCTS)
987 info->MCR &= ~SER_RTS;
989 local_irq_save(flags);
990 rtsdtr_ctrl(info->MCR);
991 local_irq_restore(flags);
994 static void rs_unthrottle(struct tty_struct * tty)
996 struct serial_state *info = tty->driver_data;
998 #ifdef SERIAL_DEBUG_THROTTLE
1001 printk("unthrottle %s: %d....\n", tty_name(tty, buf),
1002 tty->ldisc.chars_in_buffer(tty));
1005 if (serial_paranoia_check(info, tty->name, "rs_unthrottle"))
1012 rs_send_xchar(tty, START_CHAR(tty));
1014 if (tty->termios.c_cflag & CRTSCTS)
1015 info->MCR |= SER_RTS;
1016 local_irq_save(flags);
1017 rtsdtr_ctrl(info->MCR);
1018 local_irq_restore(flags);
1022 * ------------------------------------------------------------
1023 * rs_ioctl() and friends
1024 * ------------------------------------------------------------
1027 static int get_serial_info(struct tty_struct *tty, struct serial_state *state,
1028 struct serial_struct __user * retinfo)
1030 struct serial_struct tmp;
1034 memset(&tmp, 0, sizeof(tmp));
1036 tmp.line = tty->index;
1037 tmp.port = state->port;
1038 tmp.flags = state->tport.flags;
1039 tmp.xmit_fifo_size = state->xmit_fifo_size;
1040 tmp.baud_base = state->baud_base;
1041 tmp.close_delay = state->tport.close_delay;
1042 tmp.closing_wait = state->tport.closing_wait;
1043 tmp.custom_divisor = state->custom_divisor;
1045 if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
1050 static int set_serial_info(struct tty_struct *tty, struct serial_state *state,
1051 struct serial_struct __user * new_info)
1053 struct tty_port *port = &state->tport;
1054 struct serial_struct new_serial;
1058 if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
1062 change_spd = ((new_serial.flags ^ port->flags) & ASYNC_SPD_MASK) ||
1063 new_serial.custom_divisor != state->custom_divisor;
1064 if (new_serial.irq || new_serial.port != state->port ||
1065 new_serial.xmit_fifo_size != state->xmit_fifo_size) {
1070 if (!serial_isroot()) {
1071 if ((new_serial.baud_base != state->baud_base) ||
1072 (new_serial.close_delay != port->close_delay) ||
1073 (new_serial.xmit_fifo_size != state->xmit_fifo_size) ||
1074 ((new_serial.flags & ~ASYNC_USR_MASK) !=
1075 (port->flags & ~ASYNC_USR_MASK))) {
1079 port->flags = ((port->flags & ~ASYNC_USR_MASK) |
1080 (new_serial.flags & ASYNC_USR_MASK));
1081 state->custom_divisor = new_serial.custom_divisor;
1082 goto check_and_exit;
1085 if (new_serial.baud_base < 9600) {
1091 * OK, past this point, all the error checking has been done.
1092 * At this point, we start making changes.....
1095 state->baud_base = new_serial.baud_base;
1096 port->flags = ((port->flags & ~ASYNC_FLAGS) |
1097 (new_serial.flags & ASYNC_FLAGS));
1098 state->custom_divisor = new_serial.custom_divisor;
1099 port->close_delay = new_serial.close_delay * HZ/100;
1100 port->closing_wait = new_serial.closing_wait * HZ/100;
1101 port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1104 if (port->flags & ASYNC_INITIALIZED) {
1106 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
1107 tty->alt_speed = 57600;
1108 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
1109 tty->alt_speed = 115200;
1110 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
1111 tty->alt_speed = 230400;
1112 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
1113 tty->alt_speed = 460800;
1114 change_speed(tty, state, NULL);
1117 retval = startup(tty, state);
1124 * get_lsr_info - get line status register info
1126 * Purpose: Let user call ioctl() to get info when the UART physically
1127 * is emptied. On bus types like RS485, the transmitter must
1128 * release the bus after transmitting. This must be done when
1129 * the transmit shift register is empty, not be done when the
1130 * transmit holding register is empty. This functionality
1131 * allows an RS485 driver to be written in user space.
1133 static int get_lsr_info(struct serial_state *info, unsigned int __user *value)
1135 unsigned char status;
1136 unsigned int result;
1137 unsigned long flags;
1139 local_irq_save(flags);
1140 status = custom.serdatr;
1142 local_irq_restore(flags);
1143 result = ((status & SDR_TSRE) ? TIOCSER_TEMT : 0);
1144 if (copy_to_user(value, &result, sizeof(int)))
1150 static int rs_tiocmget(struct tty_struct *tty)
1152 struct serial_state *info = tty->driver_data;
1153 unsigned char control, status;
1154 unsigned long flags;
1156 if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
1158 if (tty->flags & (1 << TTY_IO_ERROR))
1161 control = info->MCR;
1162 local_irq_save(flags);
1164 local_irq_restore(flags);
1165 return ((control & SER_RTS) ? TIOCM_RTS : 0)
1166 | ((control & SER_DTR) ? TIOCM_DTR : 0)
1167 | (!(status & SER_DCD) ? TIOCM_CAR : 0)
1168 | (!(status & SER_DSR) ? TIOCM_DSR : 0)
1169 | (!(status & SER_CTS) ? TIOCM_CTS : 0);
1172 static int rs_tiocmset(struct tty_struct *tty, unsigned int set,
1175 struct serial_state *info = tty->driver_data;
1176 unsigned long flags;
1178 if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
1180 if (tty->flags & (1 << TTY_IO_ERROR))
1183 local_irq_save(flags);
1184 if (set & TIOCM_RTS)
1185 info->MCR |= SER_RTS;
1186 if (set & TIOCM_DTR)
1187 info->MCR |= SER_DTR;
1188 if (clear & TIOCM_RTS)
1189 info->MCR &= ~SER_RTS;
1190 if (clear & TIOCM_DTR)
1191 info->MCR &= ~SER_DTR;
1192 rtsdtr_ctrl(info->MCR);
1193 local_irq_restore(flags);
1198 * rs_break() --- routine which turns the break handling on or off
1200 static int rs_break(struct tty_struct *tty, int break_state)
1202 struct serial_state *info = tty->driver_data;
1203 unsigned long flags;
1205 if (serial_paranoia_check(info, tty->name, "rs_break"))
1208 local_irq_save(flags);
1209 if (break_state == -1)
1210 custom.adkcon = AC_SETCLR | AC_UARTBRK;
1212 custom.adkcon = AC_UARTBRK;
1214 local_irq_restore(flags);
1219 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1220 * Return: write counters to the user passed counter struct
1221 * NB: both 1->0 and 0->1 transitions are counted except for
1222 * RI where only 0->1 is counted.
1224 static int rs_get_icount(struct tty_struct *tty,
1225 struct serial_icounter_struct *icount)
1227 struct serial_state *info = tty->driver_data;
1228 struct async_icount cnow;
1229 unsigned long flags;
1231 local_irq_save(flags);
1232 cnow = info->icount;
1233 local_irq_restore(flags);
1234 icount->cts = cnow.cts;
1235 icount->dsr = cnow.dsr;
1236 icount->rng = cnow.rng;
1237 icount->dcd = cnow.dcd;
1238 icount->rx = cnow.rx;
1239 icount->tx = cnow.tx;
1240 icount->frame = cnow.frame;
1241 icount->overrun = cnow.overrun;
1242 icount->parity = cnow.parity;
1243 icount->brk = cnow.brk;
1244 icount->buf_overrun = cnow.buf_overrun;
1249 static int rs_ioctl(struct tty_struct *tty,
1250 unsigned int cmd, unsigned long arg)
1252 struct serial_state *info = tty->driver_data;
1253 struct async_icount cprev, cnow; /* kernel counter temps */
1254 void __user *argp = (void __user *)arg;
1255 unsigned long flags;
1257 if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
1260 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1261 (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) &&
1262 (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1263 if (tty->flags & (1 << TTY_IO_ERROR))
1269 return get_serial_info(tty, info, argp);
1271 return set_serial_info(tty, info, argp);
1275 case TIOCSERGETLSR: /* Get line status register */
1276 return get_lsr_info(info, argp);
1278 case TIOCSERGSTRUCT:
1279 if (copy_to_user(argp,
1280 info, sizeof(struct serial_state)))
1285 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1286 * - mask passed in arg for lines of interest
1287 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1288 * Caller should use TIOCGICOUNT to see which one it was
1291 local_irq_save(flags);
1292 /* note the counters on entry */
1293 cprev = info->icount;
1294 local_irq_restore(flags);
1296 interruptible_sleep_on(&info->tport.delta_msr_wait);
1297 /* see if a signal did it */
1298 if (signal_pending(current))
1299 return -ERESTARTSYS;
1300 local_irq_save(flags);
1301 cnow = info->icount; /* atomic copy */
1302 local_irq_restore(flags);
1303 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1304 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1305 return -EIO; /* no change => error */
1306 if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1307 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1308 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1309 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
1318 /* "setserial -W" is called in Debian boot */
1319 printk ("TIOCSER?WILD ioctl obsolete, ignored.\n");
1323 return -ENOIOCTLCMD;
1328 static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1330 struct serial_state *info = tty->driver_data;
1331 unsigned long flags;
1332 unsigned int cflag = tty->termios.c_cflag;
1334 change_speed(tty, info, old_termios);
1336 /* Handle transition to B0 status */
1337 if ((old_termios->c_cflag & CBAUD) &&
1339 info->MCR &= ~(SER_DTR|SER_RTS);
1340 local_irq_save(flags);
1341 rtsdtr_ctrl(info->MCR);
1342 local_irq_restore(flags);
1345 /* Handle transition away from B0 status */
1346 if (!(old_termios->c_cflag & CBAUD) &&
1348 info->MCR |= SER_DTR;
1349 if (!(tty->termios.c_cflag & CRTSCTS) ||
1350 !test_bit(TTY_THROTTLED, &tty->flags)) {
1351 info->MCR |= SER_RTS;
1353 local_irq_save(flags);
1354 rtsdtr_ctrl(info->MCR);
1355 local_irq_restore(flags);
1358 /* Handle turning off CRTSCTS */
1359 if ((old_termios->c_cflag & CRTSCTS) &&
1360 !(tty->termios.c_cflag & CRTSCTS)) {
1361 tty->hw_stopped = 0;
1367 * No need to wake up processes in open wait, since they
1368 * sample the CLOCAL flag once, and don't recheck it.
1369 * XXX It's not clear whether the current behavior is correct
1370 * or not. Hence, this may change.....
1372 if (!(old_termios->c_cflag & CLOCAL) &&
1373 (tty->termios.c_cflag & CLOCAL))
1374 wake_up_interruptible(&info->open_wait);
1379 * ------------------------------------------------------------
1382 * This routine is called when the serial port gets closed. First, we
1383 * wait for the last remaining data to be sent. Then, we unlink its
1384 * async structure from the interrupt chain if necessary, and we free
1385 * that IRQ if nothing is left in the chain.
1386 * ------------------------------------------------------------
1388 static void rs_close(struct tty_struct *tty, struct file * filp)
1390 struct serial_state *state = tty->driver_data;
1391 struct tty_port *port = &state->tport;
1393 if (serial_paranoia_check(state, tty->name, "rs_close"))
1396 if (tty_port_close_start(port, tty, filp) == 0)
1400 * At this point we stop accepting input. To do this, we
1401 * disable the receive line status interrupts, and tell the
1402 * interrupt driver to stop checking the data ready bit in the
1403 * line status register.
1405 state->read_status_mask &= ~UART_LSR_DR;
1406 if (port->flags & ASYNC_INITIALIZED) {
1407 /* disable receive interrupts */
1408 custom.intena = IF_RBF;
1410 /* clear any pending receive interrupt */
1411 custom.intreq = IF_RBF;
1415 * Before we drop DTR, make sure the UART transmitter
1416 * has completely drained; this is especially
1417 * important if there is a transmit FIFO!
1419 rs_wait_until_sent(tty, state->timeout);
1421 shutdown(tty, state);
1422 rs_flush_buffer(tty);
1424 tty_ldisc_flush(tty);
1427 tty_port_close_end(port, tty);
1431 * rs_wait_until_sent() --- wait until the transmitter is empty
1433 static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
1435 struct serial_state *info = tty->driver_data;
1436 unsigned long orig_jiffies, char_time;
1439 if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent"))
1442 if (info->xmit_fifo_size == 0)
1443 return; /* Just in case.... */
1445 orig_jiffies = jiffies;
1448 * Set the check interval to be 1/5 of the estimated time to
1449 * send a single character, and make it at least 1. The check
1450 * interval should also be less than the timeout.
1452 * Note: we have to use pretty tight timings here to satisfy
1455 char_time = (info->timeout - HZ/50) / info->xmit_fifo_size;
1456 char_time = char_time / 5;
1460 char_time = min_t(unsigned long, char_time, timeout);
1462 * If the transmitter hasn't cleared in twice the approximate
1463 * amount of time to send the entire FIFO, it probably won't
1464 * ever clear. This assumes the UART isn't doing flow
1465 * control, which is currently the case. Hence, if it ever
1466 * takes longer than info->timeout, this is probably due to a
1467 * UART bug of some kind. So, we clamp the timeout parameter at
1470 if (!timeout || timeout > 2*info->timeout)
1471 timeout = 2*info->timeout;
1472 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1473 printk("In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
1474 printk("jiff=%lu...", jiffies);
1476 while(!((lsr = custom.serdatr) & SDR_TSRE)) {
1477 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1478 printk("serdatr = %d (jiff=%lu)...", lsr, jiffies);
1480 msleep_interruptible(jiffies_to_msecs(char_time));
1481 if (signal_pending(current))
1483 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1486 __set_current_state(TASK_RUNNING);
1488 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1489 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1494 * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
1496 static void rs_hangup(struct tty_struct *tty)
1498 struct serial_state *info = tty->driver_data;
1500 if (serial_paranoia_check(info, tty->name, "rs_hangup"))
1503 rs_flush_buffer(tty);
1504 shutdown(tty, info);
1505 info->tport.count = 0;
1506 info->tport.flags &= ~ASYNC_NORMAL_ACTIVE;
1507 info->tport.tty = NULL;
1508 wake_up_interruptible(&info->tport.open_wait);
1512 * This routine is called whenever a serial port is opened. It
1513 * enables interrupts for a serial port, linking in its async structure into
1514 * the IRQ chain. It also performs the serial-specific
1515 * initialization for the tty structure.
1517 static int rs_open(struct tty_struct *tty, struct file * filp)
1519 struct serial_state *info = rs_table + tty->index;
1520 struct tty_port *port = &info->tport;
1525 tty->driver_data = info;
1527 if (serial_paranoia_check(info, tty->name, "rs_open"))
1530 port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1532 retval = startup(tty, info);
1537 return tty_port_block_til_ready(port, tty, filp);
1541 * /proc fs routines....
1544 static inline void line_info(struct seq_file *m, int line,
1545 struct serial_state *state)
1547 char stat_buf[30], control, status;
1548 unsigned long flags;
1550 seq_printf(m, "%d: uart:amiga_builtin", line);
1552 local_irq_save(flags);
1554 control = (state->tport.flags & ASYNC_INITIALIZED) ? state->MCR : status;
1555 local_irq_restore(flags);
1559 if(!(control & SER_RTS))
1560 strcat(stat_buf, "|RTS");
1561 if(!(status & SER_CTS))
1562 strcat(stat_buf, "|CTS");
1563 if(!(control & SER_DTR))
1564 strcat(stat_buf, "|DTR");
1565 if(!(status & SER_DSR))
1566 strcat(stat_buf, "|DSR");
1567 if(!(status & SER_DCD))
1568 strcat(stat_buf, "|CD");
1571 seq_printf(m, " baud:%d", state->baud_base / state->quot);
1573 seq_printf(m, " tx:%d rx:%d", state->icount.tx, state->icount.rx);
1575 if (state->icount.frame)
1576 seq_printf(m, " fe:%d", state->icount.frame);
1578 if (state->icount.parity)
1579 seq_printf(m, " pe:%d", state->icount.parity);
1581 if (state->icount.brk)
1582 seq_printf(m, " brk:%d", state->icount.brk);
1584 if (state->icount.overrun)
1585 seq_printf(m, " oe:%d", state->icount.overrun);
1588 * Last thing is the RS-232 status lines
1590 seq_printf(m, " %s\n", stat_buf+1);
1593 static int rs_proc_show(struct seq_file *m, void *v)
1595 seq_printf(m, "serinfo:1.0 driver:%s\n", serial_version);
1596 line_info(m, 0, &rs_table[0]);
1600 static int rs_proc_open(struct inode *inode, struct file *file)
1602 return single_open(file, rs_proc_show, NULL);
1605 static const struct file_operations rs_proc_fops = {
1606 .owner = THIS_MODULE,
1607 .open = rs_proc_open,
1609 .llseek = seq_lseek,
1610 .release = single_release,
1614 * ---------------------------------------------------------------------
1615 * rs_init() and friends
1617 * rs_init() is called at boot-time to initialize the serial driver.
1618 * ---------------------------------------------------------------------
1622 * This routine prints out the appropriate serial driver version
1623 * number, and identifies which options were configured into this
1626 static void show_serial_version(void)
1628 printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
1632 static const struct tty_operations serial_ops = {
1636 .put_char = rs_put_char,
1637 .flush_chars = rs_flush_chars,
1638 .write_room = rs_write_room,
1639 .chars_in_buffer = rs_chars_in_buffer,
1640 .flush_buffer = rs_flush_buffer,
1642 .throttle = rs_throttle,
1643 .unthrottle = rs_unthrottle,
1644 .set_termios = rs_set_termios,
1647 .hangup = rs_hangup,
1648 .break_ctl = rs_break,
1649 .send_xchar = rs_send_xchar,
1650 .wait_until_sent = rs_wait_until_sent,
1651 .tiocmget = rs_tiocmget,
1652 .tiocmset = rs_tiocmset,
1653 .get_icount = rs_get_icount,
1654 .proc_fops = &rs_proc_fops,
1657 static int amiga_carrier_raised(struct tty_port *port)
1659 return !(ciab.pra & SER_DCD);
1662 static void amiga_dtr_rts(struct tty_port *port, int raise)
1664 struct serial_state *info = container_of(port, struct serial_state,
1666 unsigned long flags;
1669 info->MCR |= SER_DTR|SER_RTS;
1671 info->MCR &= ~(SER_DTR|SER_RTS);
1673 local_irq_save(flags);
1674 rtsdtr_ctrl(info->MCR);
1675 local_irq_restore(flags);
1678 static const struct tty_port_operations amiga_port_ops = {
1679 .carrier_raised = amiga_carrier_raised,
1680 .dtr_rts = amiga_dtr_rts,
1684 * The serial driver boot-time initialization code!
1686 static int __init amiga_serial_probe(struct platform_device *pdev)
1688 unsigned long flags;
1689 struct serial_state * state;
1692 serial_driver = alloc_tty_driver(NR_PORTS);
1696 show_serial_version();
1698 /* Initialize the tty_driver structure */
1700 serial_driver->driver_name = "amiserial";
1701 serial_driver->name = "ttyS";
1702 serial_driver->major = TTY_MAJOR;
1703 serial_driver->minor_start = 64;
1704 serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
1705 serial_driver->subtype = SERIAL_TYPE_NORMAL;
1706 serial_driver->init_termios = tty_std_termios;
1707 serial_driver->init_termios.c_cflag =
1708 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1709 serial_driver->flags = TTY_DRIVER_REAL_RAW;
1710 tty_set_operations(serial_driver, &serial_ops);
1713 state->port = (int)&custom.serdatr; /* Just to give it a value */
1714 state->custom_divisor = 0;
1715 state->icount.cts = state->icount.dsr =
1716 state->icount.rng = state->icount.dcd = 0;
1717 state->icount.rx = state->icount.tx = 0;
1718 state->icount.frame = state->icount.parity = 0;
1719 state->icount.overrun = state->icount.brk = 0;
1720 tty_port_init(&state->tport);
1721 state->tport.ops = &amiga_port_ops;
1722 tty_port_link_device(&state->tport, serial_driver, 0);
1724 error = tty_register_driver(serial_driver);
1726 goto fail_put_tty_driver;
1728 printk(KERN_INFO "ttyS0 is the amiga builtin serial port\n");
1730 /* Hardware set up */
1732 state->baud_base = amiga_colorclock;
1733 state->xmit_fifo_size = 1;
1735 /* set ISRs, and then disable the rx interrupts */
1736 error = request_irq(IRQ_AMIGA_TBE, ser_tx_int, 0, "serial TX", state);
1738 goto fail_unregister;
1740 error = request_irq(IRQ_AMIGA_RBF, ser_rx_int, 0,
1741 "serial RX", state);
1745 local_irq_save(flags);
1747 /* turn off Rx and Tx interrupts */
1748 custom.intena = IF_RBF | IF_TBE;
1751 /* clear any pending interrupt */
1752 custom.intreq = IF_RBF | IF_TBE;
1755 local_irq_restore(flags);
1758 * set the appropriate directions for the modem control flags,
1759 * and clear RTS and DTR
1761 ciab.ddra |= (SER_DTR | SER_RTS); /* outputs */
1762 ciab.ddra &= ~(SER_DCD | SER_CTS | SER_DSR); /* inputs */
1764 platform_set_drvdata(pdev, state);
1769 free_irq(IRQ_AMIGA_TBE, state);
1771 tty_unregister_driver(serial_driver);
1772 fail_put_tty_driver:
1773 tty_port_destroy(&state->tport);
1774 put_tty_driver(serial_driver);
1778 static int __exit amiga_serial_remove(struct platform_device *pdev)
1781 struct serial_state *state = platform_get_drvdata(pdev);
1783 /* printk("Unloading %s: version %s\n", serial_name, serial_version); */
1784 if ((error = tty_unregister_driver(serial_driver)))
1785 printk("SERIAL: failed to unregister serial driver (%d)\n",
1787 put_tty_driver(serial_driver);
1788 tty_port_destroy(&state->tport);
1790 free_irq(IRQ_AMIGA_TBE, state);
1791 free_irq(IRQ_AMIGA_RBF, state);
1793 platform_set_drvdata(pdev, NULL);
1798 static struct platform_driver amiga_serial_driver = {
1799 .remove = __exit_p(amiga_serial_remove),
1801 .name = "amiga-serial",
1802 .owner = THIS_MODULE,
1806 static int __init amiga_serial_init(void)
1808 return platform_driver_probe(&amiga_serial_driver, amiga_serial_probe);
1811 module_init(amiga_serial_init);
1813 static void __exit amiga_serial_exit(void)
1815 platform_driver_unregister(&amiga_serial_driver);
1818 module_exit(amiga_serial_exit);
1821 #if defined(CONFIG_SERIAL_CONSOLE) && !defined(MODULE)
1824 * ------------------------------------------------------------
1825 * Serial console driver
1826 * ------------------------------------------------------------
1829 static void amiga_serial_putc(char c)
1831 custom.serdat = (unsigned char)c | 0x100;
1832 while (!(custom.serdatr & 0x2000))
1837 * Print a string to the serial port trying not to disturb
1838 * any possible real use of the port...
1840 * The console must be locked when we get here.
1842 static void serial_console_write(struct console *co, const char *s,
1845 unsigned short intena = custom.intenar;
1847 custom.intena = IF_TBE;
1851 amiga_serial_putc('\r');
1852 amiga_serial_putc(*s++);
1855 custom.intena = IF_SETCLR | (intena & IF_TBE);
1858 static struct tty_driver *serial_console_device(struct console *c, int *index)
1861 return serial_driver;
1864 static struct console sercons = {
1866 .write = serial_console_write,
1867 .device = serial_console_device,
1868 .flags = CON_PRINTBUFFER,
1875 static int __init amiserial_console_init(void)
1877 register_console(&sercons);
1880 console_initcall(amiserial_console_init);
1882 #endif /* CONFIG_SERIAL_CONSOLE && !MODULE */
1884 MODULE_LICENSE("GPL");
1885 MODULE_ALIAS("platform:amiga-serial");