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>
88 #include <asm/system.h>
92 #include <asm/amigahw.h>
93 #include <asm/amigaints.h>
96 struct tty_port tport;
98 struct async_icount icount;
104 int read_status_mask;
105 int ignore_status_mask;
108 int IER; /* Interrupt Enable Register */
109 int MCR; /* Modem control register */
110 int x_char; /* xon/xoff character */
113 #define custom amiga_custom
114 static char *serial_name = "Amiga-builtin serial driver";
116 static struct tty_driver *serial_driver;
118 /* number of characters left in xmit buffer before we ask for more */
119 #define WAKEUP_CHARS 256
121 static unsigned char current_ctl_bits;
123 static void change_speed(struct tty_struct *tty, struct serial_state *info,
124 struct ktermios *old);
125 static void rs_wait_until_sent(struct tty_struct *tty, int timeout);
128 static struct serial_state rs_table[1];
130 #define NR_PORTS ARRAY_SIZE(rs_table)
132 #include <asm/uaccess.h>
134 #define serial_isroot() (capable(CAP_SYS_ADMIN))
137 static inline int serial_paranoia_check(struct serial_state *info,
138 char *name, const char *routine)
140 #ifdef SERIAL_PARANOIA_CHECK
141 static const char *badmagic =
142 "Warning: bad magic number for serial struct (%s) in %s\n";
143 static const char *badinfo =
144 "Warning: null async_struct for (%s) in %s\n";
147 printk(badinfo, name, routine);
150 if (info->magic != SERIAL_MAGIC) {
151 printk(badmagic, name, routine);
158 /* some serial hardware definitions */
159 #define SDR_OVRUN (1<<15)
160 #define SDR_RBF (1<<14)
161 #define SDR_TBE (1<<13)
162 #define SDR_TSRE (1<<12)
164 #define SERPER_PARENB (1<<15)
166 #define AC_SETCLR (1<<15)
167 #define AC_UARTBRK (1<<11)
169 #define SER_DTR (1<<7)
170 #define SER_RTS (1<<6)
171 #define SER_DCD (1<<5)
172 #define SER_CTS (1<<4)
173 #define SER_DSR (1<<3)
175 static __inline__ void rtsdtr_ctrl(int bits)
177 ciab.pra = ((bits & (SER_RTS | SER_DTR)) ^ (SER_RTS | SER_DTR)) | (ciab.pra & ~(SER_RTS | SER_DTR));
181 * ------------------------------------------------------------
182 * rs_stop() and rs_start()
184 * This routines are called before setting or resetting tty->stopped.
185 * They enable or disable transmitter interrupts, as necessary.
186 * ------------------------------------------------------------
188 static void rs_stop(struct tty_struct *tty)
190 struct serial_state *info = tty->driver_data;
193 if (serial_paranoia_check(info, tty->name, "rs_stop"))
196 local_irq_save(flags);
197 if (info->IER & UART_IER_THRI) {
198 info->IER &= ~UART_IER_THRI;
199 /* disable Tx interrupt and remove any pending interrupts */
200 custom.intena = IF_TBE;
202 custom.intreq = IF_TBE;
205 local_irq_restore(flags);
208 static void rs_start(struct tty_struct *tty)
210 struct serial_state *info = tty->driver_data;
213 if (serial_paranoia_check(info, tty->name, "rs_start"))
216 local_irq_save(flags);
217 if (info->xmit.head != info->xmit.tail
219 && !(info->IER & UART_IER_THRI)) {
220 info->IER |= UART_IER_THRI;
221 custom.intena = IF_SETCLR | IF_TBE;
223 /* set a pending Tx Interrupt, transmitter should restart now */
224 custom.intreq = IF_SETCLR | IF_TBE;
227 local_irq_restore(flags);
231 * ----------------------------------------------------------------------
233 * Here starts the interrupt handling routines. All of the following
234 * subroutines are declared as inline and are folded into
235 * rs_interrupt(). They were separated out for readability's sake.
237 * Note: rs_interrupt() is a "fast" interrupt, which means that it
238 * runs with interrupts turned off. People who may want to modify
239 * rs_interrupt() should try to keep the interrupt handler as fast as
240 * possible. After you are done making modifications, it is not a bad
243 * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
245 * and look at the resulting assemble code in serial.s.
247 * - Ted Ts'o (tytso@mit.edu), 7-Mar-93
248 * -----------------------------------------------------------------------
251 static void receive_chars(struct serial_state *info)
255 struct tty_struct *tty = info->tport.tty;
256 unsigned char ch, flag;
257 struct async_icount *icount;
260 icount = &info->icount;
262 status = UART_LSR_DR; /* We obviously have a character! */
263 serdatr = custom.serdatr;
265 custom.intreq = IF_RBF;
268 if((serdatr & 0x1ff) == 0)
269 status |= UART_LSR_BI;
270 if(serdatr & SDR_OVRUN)
271 status |= UART_LSR_OE;
276 #ifdef SERIAL_DEBUG_INTR
277 printk("DR%02x:%02x...", ch, status);
282 * We don't handle parity or frame errors - but I have left
283 * the code in, since I'm not sure that the errors can't be
287 if (status & (UART_LSR_BI | UART_LSR_PE |
288 UART_LSR_FE | UART_LSR_OE)) {
290 * For statistics only
292 if (status & UART_LSR_BI) {
293 status &= ~(UART_LSR_FE | UART_LSR_PE);
295 } else if (status & UART_LSR_PE)
297 else if (status & UART_LSR_FE)
299 if (status & UART_LSR_OE)
303 * Now check to see if character should be
304 * ignored, and mask off conditions which
307 if (status & info->ignore_status_mask)
310 status &= info->read_status_mask;
312 if (status & (UART_LSR_BI)) {
313 #ifdef SERIAL_DEBUG_INTR
314 printk("handling break....");
317 if (info->tport.flags & ASYNC_SAK)
319 } else if (status & UART_LSR_PE)
321 else if (status & UART_LSR_FE)
323 if (status & UART_LSR_OE) {
325 * Overrun is special, since it's
326 * reported immediately, and doesn't
327 * affect the current character
332 tty_insert_flip_char(tty, ch, flag);
334 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
335 tty_flip_buffer_push(tty);
340 static void transmit_chars(struct serial_state *info)
342 custom.intreq = IF_TBE;
345 custom.serdat = info->x_char | 0x100;
351 if (info->xmit.head == info->xmit.tail
352 || info->tport.tty->stopped
353 || info->tport.tty->hw_stopped) {
354 info->IER &= ~UART_IER_THRI;
355 custom.intena = IF_TBE;
360 custom.serdat = info->xmit.buf[info->xmit.tail++] | 0x100;
362 info->xmit.tail = info->xmit.tail & (SERIAL_XMIT_SIZE-1);
365 if (CIRC_CNT(info->xmit.head,
367 SERIAL_XMIT_SIZE) < WAKEUP_CHARS)
368 tty_wakeup(info->tport.tty);
370 #ifdef SERIAL_DEBUG_INTR
373 if (info->xmit.head == info->xmit.tail) {
374 custom.intena = IF_TBE;
376 info->IER &= ~UART_IER_THRI;
380 static void check_modem_status(struct serial_state *info)
382 struct tty_port *port = &info->tport;
383 unsigned char status = ciab.pra & (SER_DCD | SER_CTS | SER_DSR);
384 unsigned char dstatus;
385 struct async_icount *icount;
387 /* Determine bits that have changed */
388 dstatus = status ^ current_ctl_bits;
389 current_ctl_bits = status;
392 icount = &info->icount;
393 /* update input line counters */
394 if (dstatus & SER_DSR)
396 if (dstatus & SER_DCD) {
398 #ifdef CONFIG_HARD_PPS
399 if ((port->flags & ASYNC_HARDPPS_CD) &&
404 if (dstatus & SER_CTS)
406 wake_up_interruptible(&port->delta_msr_wait);
409 if ((port->flags & ASYNC_CHECK_CD) && (dstatus & SER_DCD)) {
410 #if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
411 printk("ttyS%d CD now %s...", info->line,
412 (!(status & SER_DCD)) ? "on" : "off");
414 if (!(status & SER_DCD))
415 wake_up_interruptible(&port->open_wait);
417 #ifdef SERIAL_DEBUG_OPEN
418 printk("doing serial hangup...");
421 tty_hangup(port->tty);
424 if (port->flags & ASYNC_CTS_FLOW) {
425 if (port->tty->hw_stopped) {
426 if (!(status & SER_CTS)) {
427 #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
428 printk("CTS tx start...");
430 port->tty->hw_stopped = 0;
431 info->IER |= UART_IER_THRI;
432 custom.intena = IF_SETCLR | IF_TBE;
434 /* set a pending Tx Interrupt, transmitter should restart now */
435 custom.intreq = IF_SETCLR | IF_TBE;
437 tty_wakeup(port->tty);
441 if ((status & SER_CTS)) {
442 #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
443 printk("CTS tx stop...");
445 port->tty->hw_stopped = 1;
446 info->IER &= ~UART_IER_THRI;
447 /* disable Tx interrupt and remove any pending interrupts */
448 custom.intena = IF_TBE;
450 custom.intreq = IF_TBE;
457 static irqreturn_t ser_vbl_int( int irq, void *data)
459 /* vbl is just a periodic interrupt we tie into to update modem status */
460 struct serial_state *info = data;
462 * TBD - is it better to unregister from this interrupt or to
463 * ignore it if MSI is clear ?
465 if(info->IER & UART_IER_MSI)
466 check_modem_status(info);
470 static irqreturn_t ser_rx_int(int irq, void *dev_id)
472 struct serial_state *info = dev_id;
474 #ifdef SERIAL_DEBUG_INTR
475 printk("ser_rx_int...");
478 if (!info->tport.tty)
482 #ifdef SERIAL_DEBUG_INTR
488 static irqreturn_t ser_tx_int(int irq, void *dev_id)
490 struct serial_state *info = dev_id;
492 if (custom.serdatr & SDR_TBE) {
493 #ifdef SERIAL_DEBUG_INTR
494 printk("ser_tx_int...");
497 if (!info->tport.tty)
500 transmit_chars(info);
501 #ifdef SERIAL_DEBUG_INTR
509 * -------------------------------------------------------------------
510 * Here ends the serial interrupt routines.
511 * -------------------------------------------------------------------
515 * ---------------------------------------------------------------
516 * Low level utility subroutines for the serial driver: routines to
517 * figure out the appropriate timeout for an interrupt chain, routines
518 * to initialize and startup a serial port, and routines to shutdown a
519 * serial port. Useful stuff like that.
520 * ---------------------------------------------------------------
523 static int startup(struct tty_struct *tty, struct serial_state *info)
525 struct tty_port *port = &info->tport;
530 page = get_zeroed_page(GFP_KERNEL);
534 local_irq_save(flags);
536 if (port->flags & ASYNC_INITIALIZED) {
544 info->xmit.buf = (unsigned char *) page;
546 #ifdef SERIAL_DEBUG_OPEN
547 printk("starting up ttys%d ...", info->line);
550 /* Clear anything in the input buffer */
552 custom.intreq = IF_RBF;
555 retval = request_irq(IRQ_AMIGA_VERTB, ser_vbl_int, 0, "serial status", info);
557 if (serial_isroot()) {
558 set_bit(TTY_IO_ERROR, &tty->flags);
564 /* enable both Rx and Tx interrupts */
565 custom.intena = IF_SETCLR | IF_RBF | IF_TBE;
567 info->IER = UART_IER_MSI;
569 /* remember current state of the DCD and CTS bits */
570 current_ctl_bits = ciab.pra & (SER_DCD | SER_CTS | SER_DSR);
574 info->MCR = SER_DTR | SER_RTS;
575 rtsdtr_ctrl(info->MCR);
577 clear_bit(TTY_IO_ERROR, &tty->flags);
578 info->xmit.head = info->xmit.tail = 0;
581 * Set up the tty->alt_speed kludge
583 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
584 tty->alt_speed = 57600;
585 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
586 tty->alt_speed = 115200;
587 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
588 tty->alt_speed = 230400;
589 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
590 tty->alt_speed = 460800;
593 * and set the speed of the serial port
595 change_speed(tty, info, NULL);
597 port->flags |= ASYNC_INITIALIZED;
598 local_irq_restore(flags);
602 local_irq_restore(flags);
607 * This routine will shutdown a serial port; interrupts are disabled, and
608 * DTR is dropped if the hangup on close termio flag is on.
610 static void shutdown(struct tty_struct *tty, struct serial_state *info)
613 struct serial_state *state;
615 if (!(info->tport.flags & ASYNC_INITIALIZED))
620 #ifdef SERIAL_DEBUG_OPEN
621 printk("Shutting down serial port %d ....\n", info->line);
624 local_irq_save(flags); /* Disable interrupts */
627 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
628 * here so the queue might never be waken up
630 wake_up_interruptible(&info->tport.delta_msr_wait);
633 * Free the IRQ, if necessary
635 free_irq(IRQ_AMIGA_VERTB, info);
637 if (info->xmit.buf) {
638 free_page((unsigned long) info->xmit.buf);
639 info->xmit.buf = NULL;
643 custom.intena = IF_RBF | IF_TBE;
646 /* disable break condition */
647 custom.adkcon = AC_UARTBRK;
650 if (tty->termios->c_cflag & HUPCL)
651 info->MCR &= ~(SER_DTR|SER_RTS);
652 rtsdtr_ctrl(info->MCR);
654 set_bit(TTY_IO_ERROR, &tty->flags);
656 info->tport.flags &= ~ASYNC_INITIALIZED;
657 local_irq_restore(flags);
662 * This routine is called to set the UART divisor registers to match
663 * the specified baud rate for a serial port.
665 static void change_speed(struct tty_struct *tty, struct serial_state *info,
666 struct ktermios *old_termios)
668 struct tty_port *port = &info->tport;
669 int quot = 0, baud_base, baud;
670 unsigned cflag, cval = 0;
674 cflag = tty->termios->c_cflag;
676 /* Byte size is always 8 bits plus parity bit if requested */
679 if (cflag & CSTOPB) {
683 if (cflag & PARENB) {
684 cval |= UART_LCR_PARITY;
687 if (!(cflag & PARODD))
688 cval |= UART_LCR_EPAR;
691 cval |= UART_LCR_SPAR;
694 /* Determine divisor based on baud rate */
695 baud = tty_get_baud_rate(tty);
697 baud = 9600; /* B0 transition handled in rs_set_termios */
698 baud_base = info->baud_base;
699 if (baud == 38400 && (port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
700 quot = info->custom_divisor;
703 /* Special case since 134 is really 134.5 */
704 quot = (2*baud_base / 269);
706 quot = baud_base / baud;
708 /* If the quotient is zero refuse the change */
709 if (!quot && old_termios) {
710 /* FIXME: Will need updating for new tty in the end */
711 tty->termios->c_cflag &= ~CBAUD;
712 tty->termios->c_cflag |= (old_termios->c_cflag & CBAUD);
713 baud = tty_get_baud_rate(tty);
717 (port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
718 quot = info->custom_divisor;
721 /* Special case since 134 is really 134.5 */
722 quot = (2*baud_base / 269);
724 quot = baud_base / baud;
727 /* As a last resort, if the quotient is zero, default to 9600 bps */
729 quot = baud_base / 9600;
731 info->timeout = ((info->xmit_fifo_size*HZ*bits*quot) / baud_base);
732 info->timeout += HZ/50; /* Add .02 seconds of slop */
734 /* CTS flow control flag and modem status interrupts */
735 info->IER &= ~UART_IER_MSI;
736 if (port->flags & ASYNC_HARDPPS_CD)
737 info->IER |= UART_IER_MSI;
738 if (cflag & CRTSCTS) {
739 port->flags |= ASYNC_CTS_FLOW;
740 info->IER |= UART_IER_MSI;
742 port->flags &= ~ASYNC_CTS_FLOW;
744 port->flags &= ~ASYNC_CHECK_CD;
746 port->flags |= ASYNC_CHECK_CD;
747 info->IER |= UART_IER_MSI;
750 * Does clearing IER_MSI imply that we should disable the VBL interrupt ?
754 * Set up parity check flag
757 info->read_status_mask = UART_LSR_OE | UART_LSR_DR;
759 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
760 if (I_BRKINT(tty) || I_PARMRK(tty))
761 info->read_status_mask |= UART_LSR_BI;
764 * Characters to ignore
766 info->ignore_status_mask = 0;
768 info->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
770 info->ignore_status_mask |= UART_LSR_BI;
772 * If we're ignore parity and break indicators, ignore
773 * overruns too. (For real raw support).
776 info->ignore_status_mask |= UART_LSR_OE;
779 * !!! ignore all characters if CREAD is not set
781 if ((cflag & CREAD) == 0)
782 info->ignore_status_mask |= UART_LSR_DR;
783 local_irq_save(flags);
788 /* Set up the baud rate */
791 /* Enable or disable parity bit */
793 if(cval & UART_LCR_PARITY)
794 serper |= (SERPER_PARENB);
796 custom.serper = serper;
800 local_irq_restore(flags);
803 static int rs_put_char(struct tty_struct *tty, unsigned char ch)
805 struct serial_state *info;
808 info = tty->driver_data;
810 if (serial_paranoia_check(info, tty->name, "rs_put_char"))
816 local_irq_save(flags);
817 if (CIRC_SPACE(info->xmit.head,
819 SERIAL_XMIT_SIZE) == 0) {
820 local_irq_restore(flags);
824 info->xmit.buf[info->xmit.head++] = ch;
825 info->xmit.head &= SERIAL_XMIT_SIZE-1;
826 local_irq_restore(flags);
830 static void rs_flush_chars(struct tty_struct *tty)
832 struct serial_state *info = tty->driver_data;
835 if (serial_paranoia_check(info, tty->name, "rs_flush_chars"))
838 if (info->xmit.head == info->xmit.tail
844 local_irq_save(flags);
845 info->IER |= UART_IER_THRI;
846 custom.intena = IF_SETCLR | IF_TBE;
848 /* set a pending Tx Interrupt, transmitter should restart now */
849 custom.intreq = IF_SETCLR | IF_TBE;
851 local_irq_restore(flags);
854 static int rs_write(struct tty_struct * tty, const unsigned char *buf, int count)
857 struct serial_state *info = tty->driver_data;
860 if (serial_paranoia_check(info, tty->name, "rs_write"))
866 local_irq_save(flags);
868 c = CIRC_SPACE_TO_END(info->xmit.head,
876 memcpy(info->xmit.buf + info->xmit.head, buf, c);
877 info->xmit.head = ((info->xmit.head + c) &
878 (SERIAL_XMIT_SIZE-1));
883 local_irq_restore(flags);
885 if (info->xmit.head != info->xmit.tail
888 && !(info->IER & UART_IER_THRI)) {
889 info->IER |= UART_IER_THRI;
891 custom.intena = IF_SETCLR | IF_TBE;
893 /* set a pending Tx Interrupt, transmitter should restart now */
894 custom.intreq = IF_SETCLR | IF_TBE;
896 local_irq_restore(flags);
901 static int rs_write_room(struct tty_struct *tty)
903 struct serial_state *info = tty->driver_data;
905 if (serial_paranoia_check(info, tty->name, "rs_write_room"))
907 return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
910 static int rs_chars_in_buffer(struct tty_struct *tty)
912 struct serial_state *info = tty->driver_data;
914 if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer"))
916 return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
919 static void rs_flush_buffer(struct tty_struct *tty)
921 struct serial_state *info = tty->driver_data;
924 if (serial_paranoia_check(info, tty->name, "rs_flush_buffer"))
926 local_irq_save(flags);
927 info->xmit.head = info->xmit.tail = 0;
928 local_irq_restore(flags);
933 * This function is used to send a high-priority XON/XOFF character to
936 static void rs_send_xchar(struct tty_struct *tty, char ch)
938 struct serial_state *info = tty->driver_data;
941 if (serial_paranoia_check(info, tty->name, "rs_send_char"))
946 /* Make sure transmit interrupts are on */
949 local_irq_save(flags);
950 if(!(custom.intenar & IF_TBE)) {
951 custom.intena = IF_SETCLR | IF_TBE;
953 /* set a pending Tx Interrupt, transmitter should restart now */
954 custom.intreq = IF_SETCLR | IF_TBE;
957 local_irq_restore(flags);
959 info->IER |= UART_IER_THRI;
964 * ------------------------------------------------------------
967 * This routine is called by the upper-layer tty layer to signal that
968 * incoming characters should be throttled.
969 * ------------------------------------------------------------
971 static void rs_throttle(struct tty_struct * tty)
973 struct serial_state *info = tty->driver_data;
975 #ifdef SERIAL_DEBUG_THROTTLE
978 printk("throttle %s: %d....\n", tty_name(tty, buf),
979 tty->ldisc.chars_in_buffer(tty));
982 if (serial_paranoia_check(info, tty->name, "rs_throttle"))
986 rs_send_xchar(tty, STOP_CHAR(tty));
988 if (tty->termios->c_cflag & CRTSCTS)
989 info->MCR &= ~SER_RTS;
991 local_irq_save(flags);
992 rtsdtr_ctrl(info->MCR);
993 local_irq_restore(flags);
996 static void rs_unthrottle(struct tty_struct * tty)
998 struct serial_state *info = tty->driver_data;
1000 #ifdef SERIAL_DEBUG_THROTTLE
1003 printk("unthrottle %s: %d....\n", tty_name(tty, buf),
1004 tty->ldisc.chars_in_buffer(tty));
1007 if (serial_paranoia_check(info, tty->name, "rs_unthrottle"))
1014 rs_send_xchar(tty, START_CHAR(tty));
1016 if (tty->termios->c_cflag & CRTSCTS)
1017 info->MCR |= SER_RTS;
1018 local_irq_save(flags);
1019 rtsdtr_ctrl(info->MCR);
1020 local_irq_restore(flags);
1024 * ------------------------------------------------------------
1025 * rs_ioctl() and friends
1026 * ------------------------------------------------------------
1029 static int get_serial_info(struct tty_struct *tty, struct serial_state *state,
1030 struct serial_struct __user * retinfo)
1032 struct serial_struct tmp;
1036 memset(&tmp, 0, sizeof(tmp));
1038 tmp.line = tty->index;
1039 tmp.port = state->port;
1040 tmp.flags = state->tport.flags;
1041 tmp.xmit_fifo_size = state->xmit_fifo_size;
1042 tmp.baud_base = state->baud_base;
1043 tmp.close_delay = state->tport.close_delay;
1044 tmp.closing_wait = state->tport.closing_wait;
1045 tmp.custom_divisor = state->custom_divisor;
1047 if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
1052 static int set_serial_info(struct tty_struct *tty, struct serial_state *state,
1053 struct serial_struct __user * new_info)
1055 struct tty_port *port = &state->tport;
1056 struct serial_struct new_serial;
1060 if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
1064 change_spd = ((new_serial.flags ^ port->flags) & ASYNC_SPD_MASK) ||
1065 new_serial.custom_divisor != state->custom_divisor;
1066 if (new_serial.irq || new_serial.port != state->port ||
1067 new_serial.xmit_fifo_size != state->xmit_fifo_size) {
1072 if (!serial_isroot()) {
1073 if ((new_serial.baud_base != state->baud_base) ||
1074 (new_serial.close_delay != port->close_delay) ||
1075 (new_serial.xmit_fifo_size != state->xmit_fifo_size) ||
1076 ((new_serial.flags & ~ASYNC_USR_MASK) !=
1077 (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 tty->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 tty->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);
1712 error = tty_register_driver(serial_driver);
1714 goto fail_put_tty_driver;
1717 state->port = (int)&custom.serdatr; /* Just to give it a value */
1718 state->custom_divisor = 0;
1719 state->icount.cts = state->icount.dsr =
1720 state->icount.rng = state->icount.dcd = 0;
1721 state->icount.rx = state->icount.tx = 0;
1722 state->icount.frame = state->icount.parity = 0;
1723 state->icount.overrun = state->icount.brk = 0;
1724 tty_port_init(&state->tport);
1725 state->tport.ops = &amiga_port_ops;
1727 printk(KERN_INFO "ttyS0 is the amiga builtin serial port\n");
1729 /* Hardware set up */
1731 state->baud_base = amiga_colorclock;
1732 state->xmit_fifo_size = 1;
1734 /* set ISRs, and then disable the rx interrupts */
1735 error = request_irq(IRQ_AMIGA_TBE, ser_tx_int, 0, "serial TX", state);
1737 goto fail_unregister;
1739 error = request_irq(IRQ_AMIGA_RBF, ser_rx_int, 0,
1740 "serial RX", state);
1744 local_irq_save(flags);
1746 /* turn off Rx and Tx interrupts */
1747 custom.intena = IF_RBF | IF_TBE;
1750 /* clear any pending interrupt */
1751 custom.intreq = IF_RBF | IF_TBE;
1754 local_irq_restore(flags);
1757 * set the appropriate directions for the modem control flags,
1758 * and clear RTS and DTR
1760 ciab.ddra |= (SER_DTR | SER_RTS); /* outputs */
1761 ciab.ddra &= ~(SER_DCD | SER_CTS | SER_DSR); /* inputs */
1763 platform_set_drvdata(pdev, state);
1768 free_irq(IRQ_AMIGA_TBE, state);
1770 tty_unregister_driver(serial_driver);
1771 fail_put_tty_driver:
1772 put_tty_driver(serial_driver);
1776 static int __exit amiga_serial_remove(struct platform_device *pdev)
1779 struct serial_state *state = platform_get_drvdata(pdev);
1781 /* printk("Unloading %s: version %s\n", serial_name, serial_version); */
1782 if ((error = tty_unregister_driver(serial_driver)))
1783 printk("SERIAL: failed to unregister serial driver (%d)\n",
1785 put_tty_driver(serial_driver);
1787 free_irq(IRQ_AMIGA_TBE, state);
1788 free_irq(IRQ_AMIGA_RBF, state);
1790 platform_set_drvdata(pdev, NULL);
1795 static struct platform_driver amiga_serial_driver = {
1796 .remove = __exit_p(amiga_serial_remove),
1798 .name = "amiga-serial",
1799 .owner = THIS_MODULE,
1803 static int __init amiga_serial_init(void)
1805 return platform_driver_probe(&amiga_serial_driver, amiga_serial_probe);
1808 module_init(amiga_serial_init);
1810 static void __exit amiga_serial_exit(void)
1812 platform_driver_unregister(&amiga_serial_driver);
1815 module_exit(amiga_serial_exit);
1818 #if defined(CONFIG_SERIAL_CONSOLE) && !defined(MODULE)
1821 * ------------------------------------------------------------
1822 * Serial console driver
1823 * ------------------------------------------------------------
1826 static void amiga_serial_putc(char c)
1828 custom.serdat = (unsigned char)c | 0x100;
1829 while (!(custom.serdatr & 0x2000))
1834 * Print a string to the serial port trying not to disturb
1835 * any possible real use of the port...
1837 * The console must be locked when we get here.
1839 static void serial_console_write(struct console *co, const char *s,
1842 unsigned short intena = custom.intenar;
1844 custom.intena = IF_TBE;
1848 amiga_serial_putc('\r');
1849 amiga_serial_putc(*s++);
1852 custom.intena = IF_SETCLR | (intena & IF_TBE);
1855 static struct tty_driver *serial_console_device(struct console *c, int *index)
1858 return serial_driver;
1861 static struct console sercons = {
1863 .write = serial_console_write,
1864 .device = serial_console_device,
1865 .flags = CON_PRINTBUFFER,
1872 static int __init amiserial_console_init(void)
1874 register_console(&sercons);
1877 console_initcall(amiserial_console_init);
1879 #endif /* CONFIG_SERIAL_CONSOLE && !MODULE */
1881 MODULE_LICENSE("GPL");
1882 MODULE_ALIAS("platform:amiga-serial");