1 /* drivers/char/ser_a2232.c */
3 /* $Id: ser_a2232.c,v 0.4 2000/01/25 12:00:00 ehaase Exp $ */
5 /* Linux serial driver for the Amiga A2232 board */
7 /* This driver is MAINTAINED. Before applying any changes, please contact
11 /* Copyright (c) 2000-2001 Enver Haase <ehaase@inf.fu-berlin.de>
12 * alias The A2232 driver project <A2232@gmx.net>
13 * All rights reserved.
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 /***************************** Documentation ************************/
32 * This driver is in EXPERIMENTAL state. That means I could not find
33 * someone with five A2232 boards with 35 ports running at 19200 bps
34 * at the same time and test the machine's behaviour.
35 * However, I know that you can performance-tweak this driver (see
37 * One thing to consider is the time this driver consumes during the
38 * Amiga's vertical blank interrupt. Everything that is to be done
39 * _IS DONE_ when entering the vertical blank interrupt handler of
41 * However, it would be more sane to only do the job for only ONE card
42 * instead of ALL cards at a time; or, more generally, to handle only
43 * SOME ports instead of ALL ports at a time.
44 * However, as long as no-one runs into problems I guess I shouldn't
45 * change the driver as it runs fine for me :) .
47 * Version history of this file:
48 * 0.4 Resolved licensing issues.
49 * 0.3 Inclusion in the Linux/m68k tree, small fixes.
50 * 0.2 Added documentation, minor typo fixes.
51 * 0.1 Initial release.
54 * - Handle incoming BREAK events. I guess "Stevens: Advanced
55 * Programming in the UNIX(R) Environment" is a good reference
56 * on what is to be done.
57 * - When installing as a module, don't simply 'printk' text, but
58 * send it to the TTY used by the user.
61 * - Jukka Marin (65EC02 code).
62 * - The other NetBSD developers on whose A2232 driver I had a
63 * pretty close look. However, I didn't copy any code so it
64 * is okay to put my code under the GPL and include it into
67 /***************************** End of Documentation *****************/
69 /***************************** Defines ******************************/
71 * Enables experimental 115200 (normal) 230400 (turbo) baud rate.
72 * The A2232 specification states it can only operate at speeds up to
73 * 19200 bits per second, and I was not able to send a file via
74 * "sz"/"rz" and a null-modem cable from one A2232 port to another
75 * at 115200 bits per second.
76 * However, this might work for you.
78 #undef A2232_SPEEDHACK
80 * Default is not to use RTS/CTS so you could be talked to death.
82 #define A2232_SUPPRESS_RTSCTS_WARNING
83 /************************* End of Defines ***************************/
85 /***************************** Includes *****************************/
86 #include <linux/module.h>
88 #include <linux/types.h>
89 #include <linux/sched.h>
90 #include <linux/interrupt.h>
91 #include <linux/kernel.h>
92 #include <linux/errno.h>
93 #include <linux/tty.h>
95 #include <asm/setup.h>
96 #include <asm/amigaints.h>
97 #include <asm/amigahw.h>
98 #include <linux/zorro.h>
100 #include <asm/semaphore.h>
102 #include <linux/delay.h>
104 #include <linux/serial.h>
105 #include <linux/generic_serial.h>
107 #include "ser_a2232.h"
108 #include "ser_a2232fw.h"
109 /************************* End of Includes **************************/
111 /***************************** Prototypes ***************************/
112 /* Helper functions */
113 static __inline__ volatile struct a2232status *a2232stat(unsigned int board,
114 unsigned int portonboard);
115 static __inline__ volatile struct a2232memory *a2232mem (unsigned int board);
116 static __inline__ void a2232_receive_char( struct a2232_port *port,
118 /* The interrupt service routine */
119 static irqreturn_t a2232_vbl_inter(int irq, void *data, struct pt_regs *fp);
120 /* Initialize the port structures */
121 static void a2232_init_portstructs(void);
122 /* Initialize and register TTY drivers. */
123 /* returns 0 IFF successful */
124 static int a2232_init_drivers(void);
126 /* BEGIN GENERIC_SERIAL PROTOTYPES */
127 static void a2232_disable_tx_interrupts(void *ptr);
128 static void a2232_enable_tx_interrupts(void *ptr);
129 static void a2232_disable_rx_interrupts(void *ptr);
130 static void a2232_enable_rx_interrupts(void *ptr);
131 static int a2232_get_CD(void *ptr);
132 static void a2232_shutdown_port(void *ptr);
133 static int a2232_set_real_termios(void *ptr);
134 static int a2232_chars_in_buffer(void *ptr);
135 static void a2232_close(void *ptr);
136 static void a2232_hungup(void *ptr);
137 /* static void a2232_getserial (void *ptr, struct serial_struct *sp); */
138 /* END GENERIC_SERIAL PROTOTYPES */
140 /* Functions that the TTY driver struct expects */
141 static int a2232_ioctl(struct tty_struct *tty, struct file *file,
142 unsigned int cmd, unsigned long arg);
143 static void a2232_throttle(struct tty_struct *tty);
144 static void a2232_unthrottle(struct tty_struct *tty);
145 static int a2232_open(struct tty_struct * tty, struct file * filp);
146 /************************* End of Prototypes ************************/
148 /***************************** Global variables *********************/
149 /*---------------------------------------------------------------------------
150 * Interface from generic_serial.c back here
151 *--------------------------------------------------------------------------*/
152 static struct real_driver a2232_real_driver = {
153 a2232_disable_tx_interrupts,
154 a2232_enable_tx_interrupts,
155 a2232_disable_rx_interrupts,
156 a2232_enable_rx_interrupts,
159 a2232_set_real_termios,
160 a2232_chars_in_buffer,
163 NULL /* a2232_getserial */
166 static void *a2232_driver_ID = &a2232_driver_ID; // Some memory address WE own.
169 static struct a2232_port a2232_ports[MAX_A2232_BOARDS*NUMLINES];
171 /* TTY driver structs */
172 static struct tty_driver *a2232_driver;
174 /* nr of cards completely (all ports) and correctly configured */
177 /* zorro_dev structs for the A2232's */
178 static struct zorro_dev *zd_a2232[MAX_A2232_BOARDS];
179 /***************************** End of Global variables **************/
181 /***************************** Functions ****************************/
182 /*** BEGIN OF REAL_DRIVER FUNCTIONS ***/
184 static void a2232_disable_tx_interrupts(void *ptr)
186 struct a2232_port *port;
187 volatile struct a2232status *stat;
191 stat = a2232stat(port->which_a2232, port->which_port_on_a2232);
192 stat->OutDisable = -1;
194 /* Does this here really have to be? */
195 local_irq_save(flags);
196 port->gs.flags &= ~GS_TX_INTEN;
197 local_irq_restore(flags);
200 static void a2232_enable_tx_interrupts(void *ptr)
202 struct a2232_port *port;
203 volatile struct a2232status *stat;
207 stat = a2232stat(port->which_a2232, port->which_port_on_a2232);
208 stat->OutDisable = 0;
210 /* Does this here really have to be? */
211 local_irq_save(flags);
212 port->gs.flags |= GS_TX_INTEN;
213 local_irq_restore(flags);
216 static void a2232_disable_rx_interrupts(void *ptr)
218 struct a2232_port *port;
220 port->disable_rx = -1;
223 static void a2232_enable_rx_interrupts(void *ptr)
225 struct a2232_port *port;
227 port->disable_rx = 0;
230 static int a2232_get_CD(void *ptr)
232 return ((struct a2232_port *) ptr)->cd_status;
235 static void a2232_shutdown_port(void *ptr)
237 struct a2232_port *port;
238 volatile struct a2232status *stat;
242 stat = a2232stat(port->which_a2232, port->which_port_on_a2232);
244 local_irq_save(flags);
246 port->gs.flags &= ~GS_ACTIVE;
248 if (port->gs.tty && port->gs.tty->termios->c_cflag & HUPCL) {
249 /* Set DTR and RTS to Low, flush output.
250 The NetBSD driver "msc.c" does it this way. */
251 stat->Command = ( (stat->Command & ~A2232CMD_CMask) |
257 local_irq_restore(flags);
259 /* After analyzing control flow, I think a2232_shutdown_port
260 is actually the last call from the system when at application
261 level someone issues a "echo Hello >>/dev/ttyY0".
262 Therefore I think the MOD_DEC_USE_COUNT should be here and
263 not in "a2232_close()". See the comment in "sx.c", too.
264 If you run into problems, compile this driver into the
265 kernel instead of compiling it as a module. */
268 static int a2232_set_real_termios(void *ptr)
270 unsigned int cflag, baud, chsize, stopb, parity, softflow;
272 int a2232_param, a2232_cmd;
275 struct a2232_port *port = ptr;
276 volatile struct a2232status *status;
277 volatile struct a2232memory *mem;
279 if (!port->gs.tty || !port->gs.tty->termios) return 0;
281 status = a2232stat(port->which_a2232, port->which_port_on_a2232);
282 mem = a2232mem(port->which_a2232);
284 a2232_param = a2232_cmd = 0;
287 baud = port->gs.baud;
289 /* speed == 0 -> drop DTR, do nothing else */
290 local_irq_save(flags);
291 // Clear DTR (and RTS... mhhh).
292 status->Command = ( (status->Command & ~A2232CMD_CMask) |
294 status->OutFlush = -1;
297 local_irq_restore(flags);
301 rate = A2232_BAUD_TABLE_NOAVAIL;
302 for (i=0; i < A2232_BAUD_TABLE_NUM_RATES * 3; i += 3){
303 if (a2232_baud_table[i] == baud){
304 if (mem->Common.Crystal == A2232_TURBO) rate = a2232_baud_table[i+2];
305 else rate = a2232_baud_table[i+1];
308 if (rate == A2232_BAUD_TABLE_NOAVAIL){
309 printk("a2232: Board %d Port %d unsupported baud rate: %d baud. Using another.\n",port->which_a2232,port->which_port_on_a2232,baud);
310 // This is useful for both (turbo or normal) Crystal versions.
311 rate = A2232PARAM_B9600;
315 cflag = port->gs.tty->termios->c_cflag;
317 // get character size
318 chsize = cflag & CSIZE;
320 case CS8: a2232_param |= A2232PARAM_8Bit; break;
321 case CS7: a2232_param |= A2232PARAM_7Bit; break;
322 case CS6: a2232_param |= A2232PARAM_6Bit; break;
323 case CS5: a2232_param |= A2232PARAM_5Bit; break;
324 default: printk("a2232: Board %d Port %d unsupported character size: %d. Using 8 data bits.\n",
325 port->which_a2232,port->which_port_on_a2232,chsize);
326 a2232_param |= A2232PARAM_8Bit; break;
329 // get number of stop bits
330 stopb = cflag & CSTOPB;
331 if (stopb){ // two stop bits instead of one
332 printk("a2232: Board %d Port %d 2 stop bits unsupported. Using 1 stop bit.\n",
333 port->which_a2232,port->which_port_on_a2232);
336 // Warn if RTS/CTS not wanted
337 if (!(cflag & CRTSCTS)){
338 #ifndef A2232_SUPPRESS_RTSCTS_WARNING
339 printk("a2232: Board %d Port %d cannot switch off firmware-implemented RTS/CTS hardware flow control.\n",
340 port->which_a2232,port->which_port_on_a2232);
344 /* I think this is correct.
345 However, IXOFF means _input_ flow control and I wonder
346 if one should care about IXON _output_ flow control,
347 too. If this makes problems, one should turn the A2232
348 firmware XON/XOFF "SoftFlow" flow control off and use
349 the conventional way of inserting START/STOP characters
350 by hand in throttle()/unthrottle().
352 softflow = !!( port->gs.tty->termios->c_iflag & IXOFF );
354 // get Parity (Enabled/Disabled? If Enabled, Odd or Even?)
355 parity = cflag & (PARENB | PARODD);
356 if (parity & PARENB){
357 if (parity & PARODD){
358 a2232_cmd |= A2232CMD_OddParity;
361 a2232_cmd |= A2232CMD_EvenParity;
364 else a2232_cmd |= A2232CMD_NoParity;
367 /* Hmm. Maybe an own a2232_port structure
368 member would be cleaner? */
370 port->gs.flags &= ~ASYNC_CHECK_CD;
372 port->gs.flags |= ASYNC_CHECK_CD;
375 /* Now we have all parameters and can go to set them: */
376 local_irq_save(flags);
378 status->Param = a2232_param | A2232PARAM_RcvBaud;
379 status->Command = a2232_cmd | A2232CMD_Open | A2232CMD_Enable;
380 status->SoftFlow = softflow;
381 status->OutDisable = 0;
384 local_irq_restore(flags);
388 static int a2232_chars_in_buffer(void *ptr)
390 struct a2232_port *port;
391 volatile struct a2232status *status;
392 unsigned char ret; /* we need modulo-256 arithmetics */
394 status = a2232stat(port->which_a2232, port->which_port_on_a2232);
395 #if A2232_IOBUFLEN != 256
396 #error "Re-Implement a2232_chars_in_buffer()!"
398 ret = (status->OutHead - status->OutTail);
402 static void a2232_close(void *ptr)
404 a2232_disable_tx_interrupts(ptr);
405 a2232_disable_rx_interrupts(ptr);
406 /* see the comment in a2232_shutdown_port above. */
409 static void a2232_hungup(void *ptr)
413 /*** END OF REAL_DRIVER FUNCTIONS ***/
415 /*** BEGIN FUNCTIONS EXPECTED BY TTY DRIVER STRUCTS ***/
416 static int a2232_ioctl( struct tty_struct *tty, struct file *file,
417 unsigned int cmd, unsigned long arg)
422 static void a2232_throttle(struct tty_struct *tty)
424 /* Throttle: System cannot take another chars: Drop RTS or
425 send the STOP char or whatever.
426 The A2232 firmware does RTS/CTS anyway, and XON/XOFF
427 if switched on. So the only thing we can do at this
428 layer here is not taking any characters out of the
429 A2232 buffer any more. */
430 struct a2232_port *port = (struct a2232_port *) tty->driver_data;
431 port->throttle_input = -1;
434 static void a2232_unthrottle(struct tty_struct *tty)
436 /* Unthrottle: dual to "throttle()" above. */
437 struct a2232_port *port = (struct a2232_port *) tty->driver_data;
438 port->throttle_input = 0;
441 static int a2232_open(struct tty_struct * tty, struct file * filp)
443 /* More or less stolen from other drivers. */
446 struct a2232_port *port;
449 port = &a2232_ports[line];
451 tty->driver_data = port;
454 retval = gs_init_port(&port->gs);
459 port->gs.flags |= GS_ACTIVE;
460 retval = gs_block_til_ready(port, filp);
467 a2232_enable_rx_interrupts(port);
471 /*** END OF FUNCTIONS EXPECTED BY TTY DRIVER STRUCTS ***/
473 static __inline__ volatile struct a2232status *a2232stat(unsigned int board, unsigned int portonboard)
475 volatile struct a2232memory *mem = a2232mem(board);
476 return &(mem->Status[portonboard]);
479 static __inline__ volatile struct a2232memory *a2232mem (unsigned int board)
481 return (volatile struct a2232memory *) ZTWO_VADDR( zd_a2232[board]->resource.start );
484 static __inline__ void a2232_receive_char( struct a2232_port *port,
487 /* Mostly stolen from other drivers.
488 Maybe one could implement a more efficient version by not only
489 transferring one character at a time.
491 struct tty_struct *tty = port->gs.tty;
493 if (tty->flip.count >= TTY_FLIPBUF_SIZE)
511 *tty->flip.flag_buf_ptr++ = err;
512 *tty->flip.char_buf_ptr++ = ch;
513 tty_flip_buffer_push(tty);
516 static irqreturn_t a2232_vbl_inter(int irq, void *data, struct pt_regs *fp)
518 #if A2232_IOBUFLEN != 256
519 #error "Re-Implement a2232_vbl_inter()!"
522 struct a2232_port *port;
523 volatile struct a2232memory *mem;
524 volatile struct a2232status *status;
525 unsigned char newhead;
526 unsigned char bufpos; /* Must be unsigned char. We need the modulo-256 arithmetics */
527 unsigned char ncd, ocd, ccd; /* names consistent with the NetBSD driver */
528 volatile u_char *ibuf, *cbuf, *obuf;
530 for (n = 0; n < nr_a2232; n++){ /* for every completely initialized A2232 board */
532 for (p = 0; p < NUMLINES; p++){ /* for every port on this board */
534 port = &a2232_ports[n*NUMLINES+p];
535 if ( port->gs.flags & GS_ACTIVE ){ /* if the port is used */
537 status = a2232stat(n,p);
539 if (!port->disable_rx && !port->throttle_input){ /* If input is not disabled */
540 newhead = status->InHead; /* 65EC02 write pointer */
541 bufpos = status->InTail;
543 /* check for input for this port */
544 if (newhead != bufpos) {
545 /* buffer for input chars/events */
546 ibuf = mem->InBuf[p];
548 /* data types of bytes in ibuf */
549 cbuf = mem->InCtl[p];
551 /* do for all chars */
552 while (bufpos != newhead) {
553 /* which type of input data? */
554 switch (cbuf[bufpos]) {
555 /* switch on input event (CD, BREAK, etc.) */
556 case A2232INCTL_EVENT:
557 switch (ibuf[bufpos++]) {
558 case A2232EVENT_Break:
559 /* TODO: Handle BREAK signal */
561 /* A2232EVENT_CarrierOn and A2232EVENT_CarrierOff are
562 handled in a separate queue and should not occur here. */
563 case A2232EVENT_Sync:
564 printk("A2232: 65EC02 software sent SYNC event, don't know what to do. Ignoring.");
567 printk("A2232: 65EC02 software broken, unknown event type %d occurred.\n",ibuf[bufpos-1]);
568 } /* event type switch */
570 case A2232INCTL_CHAR:
571 /* Receive incoming char */
572 a2232_receive_char(port, ibuf[bufpos], err);
576 printk("A2232: 65EC02 software broken, unknown data type %d occurred.\n",cbuf[bufpos]);
578 } /* switch on input data type */
579 } /* while there's something in the buffer */
581 status->InTail = bufpos; /* tell 65EC02 what we've read */
583 } /* if there was something in the buffer */
584 } /* If input is not disabled */
586 /* Now check if there's something to output */
587 obuf = mem->OutBuf[p];
588 bufpos = status->OutHead;
589 while ( (port->gs.xmit_cnt > 0) &&
590 (!port->gs.tty->stopped) &&
591 (!port->gs.tty->hw_stopped) ){ /* While there are chars to transmit */
592 if (((bufpos+1) & A2232_IOBUFLENMASK) != status->OutTail) { /* If the A2232 buffer is not full */
593 ch = port->gs.xmit_buf[port->gs.xmit_tail]; /* get the next char to transmit */
594 port->gs.xmit_tail = (port->gs.xmit_tail+1) & (SERIAL_XMIT_SIZE-1); /* modulo-addition for the gs.xmit_buf ring-buffer */
595 obuf[bufpos++] = ch; /* put it into the A2232 buffer */
598 else{ /* If A2232 the buffer is full */
599 break; /* simply stop filling it. */
602 status->OutHead = bufpos;
604 /* WakeUp if output buffer runs low */
605 if ((port->gs.xmit_cnt <= port->gs.wakeup_chars) && port->gs.tty) {
606 if ((port->gs.tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && port->gs.tty->ldisc.write_wakeup){
607 (port->gs.tty->ldisc.write_wakeup)(port->gs.tty);
609 wake_up_interruptible(&port->gs.tty->write_wait);
611 } // if the port is used
612 } // for every port on the board
614 /* Now check the CD message queue */
615 newhead = mem->Common.CDHead;
616 bufpos = mem->Common.CDTail;
617 if (newhead != bufpos){ /* There are CD events in queue */
618 ocd = mem->Common.CDStatus; /* get old status bits */
619 while (newhead != bufpos){ /* read all events */
620 ncd = mem->CDBuf[bufpos++]; /* get one event */
621 ccd = ncd ^ ocd; /* mask of changed lines */
622 ocd = ncd; /* save new status bits */
623 for(p=0; p < NUMLINES; p++){ /* for all ports */
624 if (ccd & 1){ /* this one changed */
626 struct a2232_port *port = &a2232_ports[n*7+p];
627 port->cd_status = !(ncd & 1); /* ncd&1 <=> CD is now off */
629 if (!(port->gs.flags & ASYNC_CHECK_CD))
630 ; /* Don't report DCD changes */
631 else if (port->cd_status) { // if DCD on: DCD went UP!
633 /* Are we blocking in open?*/
634 wake_up_interruptible(&port->gs.open_wait);
636 else { // if DCD off: DCD went DOWN!
638 tty_hangup (port->gs.tty);
641 } // if CD changed for this port
643 ncd >>= 1; /* Shift bits for next line */
645 } // while CD events in queue
646 mem->Common.CDStatus = ocd; /* save new status */
647 mem->Common.CDTail = bufpos; /* remove events */
648 } // if events in CD queue
650 } // for every completely initialized A2232 board
654 static void a2232_init_portstructs(void)
656 struct a2232_port *port;
659 for (i = 0; i < MAX_A2232_BOARDS*NUMLINES; i++) {
660 port = a2232_ports + i;
661 port->which_a2232 = i/NUMLINES;
662 port->which_port_on_a2232 = i%NUMLINES;
663 port->disable_rx = port->throttle_input = port->cd_status = 0;
664 port->gs.magic = A2232_MAGIC;
665 port->gs.close_delay = HZ/2;
666 port->gs.closing_wait = 30 * HZ;
667 port->gs.rd = &a2232_real_driver;
668 #ifdef NEW_WRITE_LOCKING
669 init_MUTEX(&(port->gs.port_write_sem));
671 init_waitqueue_head(&port->gs.open_wait);
672 init_waitqueue_head(&port->gs.close_wait);
676 static struct tty_operations a2232_ops = {
680 .put_char = gs_put_char,
681 .flush_chars = gs_flush_chars,
682 .write_room = gs_write_room,
683 .chars_in_buffer = gs_chars_in_buffer,
684 .flush_buffer = gs_flush_buffer,
685 .ioctl = a2232_ioctl,
686 .throttle = a2232_throttle,
687 .unthrottle = a2232_unthrottle,
688 .set_termios = gs_set_termios,
694 static int a2232_init_drivers(void)
698 a2232_driver = alloc_tty_driver(NUMLINES * nr_a2232);
701 a2232_driver->owner = THIS_MODULE;
702 a2232_driver->driver_name = "commodore_a2232";
703 a2232_driver->name = "ttyY";
704 a2232_driver->major = A2232_NORMAL_MAJOR;
705 a2232_driver->type = TTY_DRIVER_TYPE_SERIAL;
706 a2232_driver->subtype = SERIAL_TYPE_NORMAL;
707 a2232_driver->init_termios = tty_std_termios;
708 a2232_driver->init_termios.c_cflag =
709 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
710 a2232_driver->flags = TTY_DRIVER_REAL_RAW;
711 tty_set_operations(a2232_driver, &a2232_ops);
712 if ((error = tty_register_driver(a2232_driver))) {
713 printk(KERN_ERR "A2232: Couldn't register A2232 driver, error = %d\n",
715 put_tty_driver(a2232_driver);
721 static int __init a2232board_init(void)
725 unsigned int boardaddr;
730 volatile struct a2232memory *mem;
733 return -ENODEV; /* This driver is not SMP aware. Is there an SMP ZorroII-bus-machine? */
740 printk("Commodore A2232 driver initializing.\n"); /* Say that we're alive. */
744 while ( (z = zorro_find_device(ZORRO_WILDCARD, z)) ){
745 if ( (z->id != ZORRO_PROD_CBM_A2232_PROTOTYPE) &&
746 (z->id != ZORRO_PROD_CBM_A2232) ){
747 continue; // The board found was no A2232
749 if (!zorro_request_device(z,"A2232 driver"))
752 printk("Commodore A2232 found (#%d).\n",nr_a2232);
754 zd_a2232[nr_a2232] = z;
756 boardaddr = ZTWO_VADDR( z->resource.start );
757 printk("Board is located at address 0x%x, size is 0x%x.\n", boardaddr, (unsigned int) ((z->resource.end+1) - (z->resource.start)));
759 mem = (volatile struct a2232memory *) boardaddr;
761 (void) mem->Enable6502Reset; /* copy the code across to the board */
762 to = (u_char *)mem; from = a2232_65EC02code; bcount = sizeof(a2232_65EC02code) - 2;
763 start = *(short *)from;
764 from += sizeof(start);
766 while(bcount--) *to++ = *from++;
767 printk("65EC02 software uploaded to the A2232 memory.\n");
769 mem->Common.Crystal = A2232_UNKNOWN; /* use automatic speed check */
771 /* start 6502 running */
772 (void) mem->ResetBoard;
773 printk("A2232's 65EC02 CPU up and running.\n");
775 /* wait until speed detector has finished */
776 for (bcount = 0; bcount < 2000; bcount++) {
778 if (mem->Common.Crystal)
781 printk((mem->Common.Crystal?"A2232 oscillator crystal detected by 65EC02 software: ":"65EC02 software could not determine A2232 oscillator crystal: "));
782 switch (mem->Common.Crystal){
784 printk("Unknown crystal.\n");
787 printk ("Normal crystal.\n");
790 printk ("Turbo crystal.\n");
793 printk ("0x%x. Huh?\n",mem->Common.Crystal);
800 printk("Total: %d A2232 boards initialized.\n.", nr_a2232); /* Some status report if no card was found */
802 a2232_init_portstructs();
805 a2232_init_drivers also registers the drivers. Must be here because all boards
806 have to be detected first.
808 if (a2232_init_drivers()) return -ENODEV; // maybe we should use a different -Exxx?
810 request_irq(IRQ_AMIGA_VERTB, a2232_vbl_inter, 0, "A2232 serial VBL", a2232_driver_ID);
814 static void __exit a2232board_exit(void)
818 for (i = 0; i < nr_a2232; i++) {
819 zorro_release_device(zd_a2232[i]);
822 tty_unregister_driver(a2232_driver);
823 put_tty_driver(a2232_driver);
824 free_irq(IRQ_AMIGA_VERTB, a2232_driver_ID);
827 module_init(a2232board_init);
828 module_exit(a2232board_exit);
830 MODULE_AUTHOR("Enver Haase");
831 MODULE_DESCRIPTION("Amiga A2232 multi-serial board driver");
832 MODULE_LICENSE("GPL");