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RT-AC56 3.0.0.4.374.37 core
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / char / ser_a2232.c
blobdf4190d674149a0e5000250fa4241eed1bca6d0e
1 /* drivers/char/ser_a2232.c */
2
3 /* $Id: ser_a2232.c,v 0.4 2000/01/25 12:00:00 Exp $ */
4
5 /* Linux serial driver for the Amiga A2232 board */
6
7 /* This driver is MAINTAINED. Before applying any changes, please contact
8 * the author.
9 */
10
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.
14 *
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.
19 *
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.
24 *
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.
28 *
29 */
30 /***************************** Documentation ************************/
31 /*
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
36 * the source code).
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
40 * this driver.
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 :) .
46 *
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.
52 *
53 * TO DO:
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.
59 *
60 * THANKS TO:
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
65 * Linux.
66 */
67 /***************************** End of Documentation *****************/
68
69 /***************************** Defines ******************************/
70 /*
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.
77 */
78 #undef A2232_SPEEDHACK
79 /*
80 * Default is not to use RTS/CTS so you could be talked to death.
81 */
82 #define A2232_SUPPRESS_RTSCTS_WARNING
83 /************************* End of Defines ***************************/
84
85 /***************************** Includes *****************************/
86 #include <linux/module.h>
87
88 #include <linux/types.h>
89 #include <linux/interrupt.h>
90 #include <linux/kernel.h>
91 #include <linux/errno.h>
92 #include <linux/sched.h>
93 #include <linux/tty.h>
94
95 #include <asm/setup.h>
96 #include <asm/amigaints.h>
97 #include <asm/amigahw.h>
98 #include <linux/zorro.h>
99 #include <asm/irq.h>
100 #include <linux/mutex.h>
101
102 #include <linux/delay.h>
103
104 #include <linux/serial.h>
105 #include <linux/generic_serial.h>
106 #include <linux/tty_flip.h>
107
108 #include "ser_a2232.h"
109 #include "ser_a2232fw.h"
110 /************************* End of Includes **************************/
111
112 /***************************** Prototypes ***************************/
113 /* The interrupt service routine */
114 static irqreturn_t a2232_vbl_inter(int irq, void *data);
115 /* Initialize the port structures */
116 static void a2232_init_portstructs(void);
117 /* Initialize and register TTY drivers. */
118 /* returns 0 IFF successful */
119 static int a2232_init_drivers(void);
120
121 /* BEGIN GENERIC_SERIAL PROTOTYPES */
122 static void a2232_disable_tx_interrupts(void *ptr);
123 static void a2232_enable_tx_interrupts(void *ptr);
124 static void a2232_disable_rx_interrupts(void *ptr);
125 static void a2232_enable_rx_interrupts(void *ptr);
126 static int a2232_carrier_raised(struct tty_port *port);
127 static void a2232_shutdown_port(void *ptr);
128 static int a2232_set_real_termios(void *ptr);
129 static int a2232_chars_in_buffer(void *ptr);
130 static void a2232_close(void *ptr);
131 static void a2232_hungup(void *ptr);
132 /* static void a2232_getserial (void *ptr, struct serial_struct *sp); */
133 /* END GENERIC_SERIAL PROTOTYPES */
134
135 /* Functions that the TTY driver struct expects */
136 static int a2232_ioctl(struct tty_struct *tty, struct file *file,
137 unsigned int cmd, unsigned long arg);
138 static void a2232_throttle(struct tty_struct *tty);
139 static void a2232_unthrottle(struct tty_struct *tty);
140 static int a2232_open(struct tty_struct * tty, struct file * filp);
141 /************************* End of Prototypes ************************/
142
143 /***************************** Global variables *********************/
144 /*---------------------------------------------------------------------------
145 * Interface from generic_serial.c back here
146 *--------------------------------------------------------------------------*/
147 static struct real_driver a2232_real_driver = {
148 a2232_disable_tx_interrupts,
149 a2232_enable_tx_interrupts,
150 a2232_disable_rx_interrupts,
151 a2232_enable_rx_interrupts,
152 a2232_shutdown_port,
153 a2232_set_real_termios,
154 a2232_chars_in_buffer,
155 a2232_close,
156 a2232_hungup,
157 NULL /* a2232_getserial */
158 };
159
160 static void *a2232_driver_ID = &a2232_driver_ID; // Some memory address WE own.
161
162 /* Ports structs */
163 static struct a2232_port a2232_ports[MAX_A2232_BOARDS*NUMLINES];
164
165 /* TTY driver structs */
166 static struct tty_driver *a2232_driver;
167
168 /* nr of cards completely (all ports) and correctly configured */
169 static int nr_a2232;
170
171 /* zorro_dev structs for the A2232's */
172 static struct zorro_dev *zd_a2232[MAX_A2232_BOARDS];
173 /***************************** End of Global variables **************/
174
175 /* Helper functions */
176
177 static inline volatile struct a2232memory *a2232mem(unsigned int board)
178 {
179 return (volatile struct a2232memory *)ZTWO_VADDR(zd_a2232[board]->resource.start);
180 }
181
182 static inline volatile struct a2232status *a2232stat(unsigned int board,
183 unsigned int portonboard)
184 {
185 volatile struct a2232memory *mem = a2232mem(board);
186 return &(mem->Status[portonboard]);
187 }
188
189 static inline void a2232_receive_char(struct a2232_port *port, int ch, int err)
190 {
191 /* Mostly stolen from other drivers.
192 Maybe one could implement a more efficient version by not only
193 transferring one character at a time.
194 */
195 struct tty_struct *tty = port->gs.port.tty;
196
197
198 tty_insert_flip_char(tty, ch, err);
199 tty_flip_buffer_push(tty);
200 }
201
202 /***************************** Functions ****************************/
203 /*** BEGIN OF REAL_DRIVER FUNCTIONS ***/
204
205 static void a2232_disable_tx_interrupts(void *ptr)
206 {
207 struct a2232_port *port;
208 volatile struct a2232status *stat;
209 unsigned long flags;
210
211 port = ptr;
212 stat = a2232stat(port->which_a2232, port->which_port_on_a2232);
213 stat->OutDisable = -1;
214
215 /* Does this here really have to be? */
216 local_irq_save(flags);
217 port->gs.port.flags &= ~GS_TX_INTEN;
218 local_irq_restore(flags);
219 }
220
221 static void a2232_enable_tx_interrupts(void *ptr)
222 {
223 struct a2232_port *port;
224 volatile struct a2232status *stat;
225 unsigned long flags;
226
227 port = ptr;
228 stat = a2232stat(port->which_a2232, port->which_port_on_a2232);
229 stat->OutDisable = 0;
230
231 /* Does this here really have to be? */
232 local_irq_save(flags);
233 port->gs.port.flags |= GS_TX_INTEN;
234 local_irq_restore(flags);
235 }
236
237 static void a2232_disable_rx_interrupts(void *ptr)
238 {
239 struct a2232_port *port;
240 port = ptr;
241 port->disable_rx = -1;
242 }
243
244 static void a2232_enable_rx_interrupts(void *ptr)
245 {
246 struct a2232_port *port;
247 port = ptr;
248 port->disable_rx = 0;
249 }
250
251 static int a2232_carrier_raised(struct tty_port *port)
252 {
253 struct a2232_port *ap = container_of(port, struct a2232_port, gs.port);
254 return ap->cd_status;
255 }
256
257 static void a2232_shutdown_port(void *ptr)
258 {
259 struct a2232_port *port;
260 volatile struct a2232status *stat;
261 unsigned long flags;
262
263 port = ptr;
264 stat = a2232stat(port->which_a2232, port->which_port_on_a2232);
265
266 local_irq_save(flags);
267
268 port->gs.port.flags &= ~GS_ACTIVE;
269
270 if (port->gs.port.tty && port->gs.port.tty->termios->c_cflag & HUPCL) {
271 /* Set DTR and RTS to Low, flush output.
272 The NetBSD driver "msc.c" does it this way. */
273 stat->Command = ( (stat->Command & ~A2232CMD_CMask) |
274 A2232CMD_Close );
275 stat->OutFlush = -1;
276 stat->Setup = -1;
277 }
278
279 local_irq_restore(flags);
280
281 /* After analyzing control flow, I think a2232_shutdown_port
282 is actually the last call from the system when at application
283 level someone issues a "echo Hello >>/dev/ttyY0".
284 Therefore I think the MOD_DEC_USE_COUNT should be here and
285 not in "a2232_close()". See the comment in "sx.c", too.
286 If you run into problems, compile this driver into the
287 kernel instead of compiling it as a module. */
288 }
289
290 static int a2232_set_real_termios(void *ptr)
291 {
292 unsigned int cflag, baud, chsize, stopb, parity, softflow;
293 int rate;
294 int a2232_param, a2232_cmd;
295 unsigned long flags;
296 unsigned int i;
297 struct a2232_port *port = ptr;
298 volatile struct a2232status *status;
299 volatile struct a2232memory *mem;
300
301 if (!port->gs.port.tty || !port->gs.port.tty->termios) return 0;
302
303 status = a2232stat(port->which_a2232, port->which_port_on_a2232);
304 mem = a2232mem(port->which_a2232);
305
306 a2232_param = a2232_cmd = 0;
307
308 // get baud rate
309 baud = port->gs.baud;
310 if (baud == 0) {
311 /* speed == 0 -> drop DTR, do nothing else */
312 local_irq_save(flags);
313 // Clear DTR (and RTS... mhhh).
314 status->Command = ( (status->Command & ~A2232CMD_CMask) |
315 A2232CMD_Close );
316 status->OutFlush = -1;
317 status->Setup = -1;
318
319 local_irq_restore(flags);
320 return 0;
321 }
322
323 rate = A2232_BAUD_TABLE_NOAVAIL;
324 for (i=0; i < A2232_BAUD_TABLE_NUM_RATES * 3; i += 3){
325 if (a2232_baud_table[i] == baud){
326 if (mem->Common.Crystal == A2232_TURBO) rate = a2232_baud_table[i+2];
327 else rate = a2232_baud_table[i+1];
328 }
329 }
330 if (rate == A2232_BAUD_TABLE_NOAVAIL){
331 printk("a2232: Board %d Port %d unsupported baud rate: %d baud. Using another.\n",port->which_a2232,port->which_port_on_a2232,baud);
332 // This is useful for both (turbo or normal) Crystal versions.
333 rate = A2232PARAM_B9600;
334 }
335 a2232_param |= rate;
336
337 cflag = port->gs.port.tty->termios->c_cflag;
338
339 // get character size
340 chsize = cflag & CSIZE;
341 switch (chsize){
342 case CS8: a2232_param |= A2232PARAM_8Bit; break;
343 case CS7: a2232_param |= A2232PARAM_7Bit; break;
344 case CS6: a2232_param |= A2232PARAM_6Bit; break;
345 case CS5: a2232_param |= A2232PARAM_5Bit; break;
346 default: printk("a2232: Board %d Port %d unsupported character size: %d. Using 8 data bits.\n",
347 port->which_a2232,port->which_port_on_a2232,chsize);
348 a2232_param |= A2232PARAM_8Bit; break;
349 }
350
351 // get number of stop bits
352 stopb = cflag & CSTOPB;
353 if (stopb){ // two stop bits instead of one
354 printk("a2232: Board %d Port %d 2 stop bits unsupported. Using 1 stop bit.\n",
355 port->which_a2232,port->which_port_on_a2232);
356 }
357
358 // Warn if RTS/CTS not wanted
359 if (!(cflag & CRTSCTS)){
360 #ifndef A2232_SUPPRESS_RTSCTS_WARNING
361 printk("a2232: Board %d Port %d cannot switch off firmware-implemented RTS/CTS hardware flow control.\n",
362 port->which_a2232,port->which_port_on_a2232);
363 #endif
364 }
365
366 /* I think this is correct.
367 However, IXOFF means _input_ flow control and I wonder
368 if one should care about IXON _output_ flow control,
369 too. If this makes problems, one should turn the A2232
370 firmware XON/XOFF "SoftFlow" flow control off and use
371 the conventional way of inserting START/STOP characters
372 by hand in throttle()/unthrottle().
373 */
374 softflow = !!( port->gs.port.tty->termios->c_iflag & IXOFF );
375
376 // get Parity (Enabled/Disabled? If Enabled, Odd or Even?)
377 parity = cflag & (PARENB | PARODD);
378 if (parity & PARENB){
379 if (parity & PARODD){
380 a2232_cmd |= A2232CMD_OddParity;
381 }
382 else{
383 a2232_cmd |= A2232CMD_EvenParity;
384 }
385 }
386 else a2232_cmd |= A2232CMD_NoParity;
387
388
389 /* Hmm. Maybe an own a2232_port structure
390 member would be cleaner? */
391 if (cflag & CLOCAL)
392 port->gs.port.flags &= ~ASYNC_CHECK_CD;
393 else
394 port->gs.port.flags |= ASYNC_CHECK_CD;
395
396
397 /* Now we have all parameters and can go to set them: */
398 local_irq_save(flags);
399
400 status->Param = a2232_param | A2232PARAM_RcvBaud;
401 status->Command = a2232_cmd | A2232CMD_Open | A2232CMD_Enable;
402 status->SoftFlow = softflow;
403 status->OutDisable = 0;
404 status->Setup = -1;
405
406 local_irq_restore(flags);
407 return 0;
408 }
409
410 static int a2232_chars_in_buffer(void *ptr)
411 {
412 struct a2232_port *port;
413 volatile struct a2232status *status;
414 unsigned char ret; /* we need modulo-256 arithmetics */
415 port = ptr;
416 status = a2232stat(port->which_a2232, port->which_port_on_a2232);
417 #if A2232_IOBUFLEN != 256
418 #error "Re-Implement a2232_chars_in_buffer()!"
419 #endif
420 ret = (status->OutHead - status->OutTail);
421 return ret;
422 }
423
424 static void a2232_close(void *ptr)
425 {
426 a2232_disable_tx_interrupts(ptr);
427 a2232_disable_rx_interrupts(ptr);
428 /* see the comment in a2232_shutdown_port above. */
429 }
430
431 static void a2232_hungup(void *ptr)
432 {
433 a2232_close(ptr);
434 }
435 /*** END OF REAL_DRIVER FUNCTIONS ***/
436
437 /*** BEGIN FUNCTIONS EXPECTED BY TTY DRIVER STRUCTS ***/
438 static int a2232_ioctl( struct tty_struct *tty, struct file *file,
439 unsigned int cmd, unsigned long arg)
440 {
441 return -ENOIOCTLCMD;
442 }
443
444 static void a2232_throttle(struct tty_struct *tty)
445 {
446 /* Throttle: System cannot take another chars: Drop RTS or
447 send the STOP char or whatever.
448 The A2232 firmware does RTS/CTS anyway, and XON/XOFF
449 if switched on. So the only thing we can do at this
450 layer here is not taking any characters out of the
451 A2232 buffer any more. */
452 struct a2232_port *port = tty->driver_data;
453 port->throttle_input = -1;
454 }
455
456 static void a2232_unthrottle(struct tty_struct *tty)
457 {
458 /* Unthrottle: dual to "throttle()" above. */
459 struct a2232_port *port = tty->driver_data;
460 port->throttle_input = 0;
461 }
462
463 static int a2232_open(struct tty_struct * tty, struct file * filp)
464 {
465 /* More or less stolen from other drivers. */
466 int line;
467 int retval;
468 struct a2232_port *port;
469
470 line = tty->index;
471 port = &a2232_ports[line];
472
473 tty->driver_data = port;
474 port->gs.port.tty = tty;
475 port->gs.port.count++;
476 retval = gs_init_port(&port->gs);
477 if (retval) {
478 port->gs.port.count--;
479 return retval;
480 }
481 port->gs.port.flags |= GS_ACTIVE;
482 retval = gs_block_til_ready(port, filp);
483
484 if (retval) {
485 port->gs.port.count--;
486 return retval;
487 }
488
489 a2232_enable_rx_interrupts(port);
490
491 return 0;
492 }
493 /*** END OF FUNCTIONS EXPECTED BY TTY DRIVER STRUCTS ***/
494
495 static irqreturn_t a2232_vbl_inter(int irq, void *data)
496 {
497 #if A2232_IOBUFLEN != 256
498 #error "Re-Implement a2232_vbl_inter()!"
499 #endif
500
501 struct a2232_port *port;
502 volatile struct a2232memory *mem;
503 volatile struct a2232status *status;
504 unsigned char newhead;
505 unsigned char bufpos; /* Must be unsigned char. We need the modulo-256 arithmetics */
506 unsigned char ncd, ocd, ccd; /* names consistent with the NetBSD driver */
507 volatile u_char *ibuf, *cbuf, *obuf;
508 int ch, err, n, p;
509 for (n = 0; n < nr_a2232; n++){ /* for every completely initialized A2232 board */
510 mem = a2232mem(n);
511 for (p = 0; p < NUMLINES; p++){ /* for every port on this board */
512 err = 0;
513 port = &a2232_ports[n*NUMLINES+p];
514 if ( port->gs.port.flags & GS_ACTIVE ){ /* if the port is used */
515
516 status = a2232stat(n,p);
517
518 if (!port->disable_rx && !port->throttle_input){ /* If input is not disabled */
519 newhead = status->InHead; /* 65EC02 write pointer */
520 bufpos = status->InTail;
521
522 /* check for input for this port */
523 if (newhead != bufpos) {
524 /* buffer for input chars/events */
525 ibuf = mem->InBuf[p];
526
527 /* data types of bytes in ibuf */
528 cbuf = mem->InCtl[p];
529
530 /* do for all chars */
531 while (bufpos != newhead) {
532 /* which type of input data? */
533 switch (cbuf[bufpos]) {
534 /* switch on input event (CD, BREAK, etc.) */
535 case A2232INCTL_EVENT:
536 switch (ibuf[bufpos++]) {
537 case A2232EVENT_Break:
538 /* TODO: Handle BREAK signal */
539 break;
540 /* A2232EVENT_CarrierOn and A2232EVENT_CarrierOff are
541 handled in a separate queue and should not occur here. */
542 case A2232EVENT_Sync:
543 printk("A2232: 65EC02 software sent SYNC event, don't know what to do. Ignoring.");
544 break;
545 default:
546 printk("A2232: 65EC02 software broken, unknown event type %d occurred.\n",ibuf[bufpos-1]);
547 } /* event type switch */
548 break;
549 case A2232INCTL_CHAR:
550 /* Receive incoming char */
551 a2232_receive_char(port, ibuf[bufpos], err);
552 bufpos++;
553 break;
554 default:
555 printk("A2232: 65EC02 software broken, unknown data type %d occurred.\n",cbuf[bufpos]);
556 bufpos++;
557 } /* switch on input data type */
558 } /* while there's something in the buffer */
559
560 status->InTail = bufpos; /* tell 65EC02 what we've read */
561
562 } /* if there was something in the buffer */
563 } /* If input is not disabled */
564
565 /* Now check if there's something to output */
566 obuf = mem->OutBuf[p];
567 bufpos = status->OutHead;
568 while ( (port->gs.xmit_cnt > 0) &&
569 (!port->gs.port.tty->stopped) &&
570 (!port->gs.port.tty->hw_stopped) ){ /* While there are chars to transmit */
571 if (((bufpos+1) & A2232_IOBUFLENMASK) != status->OutTail) { /* If the A2232 buffer is not full */
572 ch = port->gs.xmit_buf[port->gs.xmit_tail]; /* get the next char to transmit */
573 port->gs.xmit_tail = (port->gs.xmit_tail+1) & (SERIAL_XMIT_SIZE-1); /* modulo-addition for the gs.xmit_buf ring-buffer */
574 obuf[bufpos++] = ch; /* put it into the A2232 buffer */
575 port->gs.xmit_cnt--;
576 }
577 else{ /* If A2232 the buffer is full */
578 break; /* simply stop filling it. */
579 }
580 }
581 status->OutHead = bufpos;
582
583 /* WakeUp if output buffer runs low */
584 if ((port->gs.xmit_cnt <= port->gs.wakeup_chars) && port->gs.port.tty) {
585 tty_wakeup(port->gs.port.tty);
586 }
587 } // if the port is used
588 } // for every port on the board
589
590 /* Now check the CD message queue */
591 newhead = mem->Common.CDHead;
592 bufpos = mem->Common.CDTail;
593 if (newhead != bufpos){ /* There are CD events in queue */
594 ocd = mem->Common.CDStatus; /* get old status bits */
595 while (newhead != bufpos){ /* read all events */
596 ncd = mem->CDBuf[bufpos++]; /* get one event */
597 ccd = ncd ^ ocd; /* mask of changed lines */
598 ocd = ncd; /* save new status bits */
599 for(p=0; p < NUMLINES; p++){ /* for all ports */
600 if (ccd & 1){ /* this one changed */
601
602 struct a2232_port *port = &a2232_ports[n*7+p];
603 port->cd_status = !(ncd & 1); /* ncd&1 <=> CD is now off */
604
605 if (!(port->gs.port.flags & ASYNC_CHECK_CD))
606 ; /* Don't report DCD changes */
607 else if (port->cd_status) { // if DCD on: DCD went UP!
608
609 /* Are we blocking in open?*/
610 wake_up_interruptible(&port->gs.port.open_wait);
611 }
612 else { // if DCD off: DCD went DOWN!
613 if (port->gs.port.tty)
614 tty_hangup (port->gs.port.tty);
615 }
616
617 } // if CD changed for this port
618 ccd >>= 1;
619 ncd >>= 1; /* Shift bits for next line */
620 } // for every port
621 } // while CD events in queue
622 mem->Common.CDStatus = ocd; /* save new status */
623 mem->Common.CDTail = bufpos; /* remove events */
624 } // if events in CD queue
625
626 } // for every completely initialized A2232 board
627 return IRQ_HANDLED;
628 }
629
630 static const struct tty_port_operations a2232_port_ops = {
631 .carrier_raised = a2232_carrier_raised,
632 };
633
634 static void a2232_init_portstructs(void)
635 {
636 struct a2232_port *port;
637 int i;
638
639 for (i = 0; i < MAX_A2232_BOARDS*NUMLINES; i++) {
640 port = a2232_ports + i;
641 tty_port_init(&port->gs.port);
642 port->gs.port.ops = &a2232_port_ops;
643 port->which_a2232 = i/NUMLINES;
644 port->which_port_on_a2232 = i%NUMLINES;
645 port->disable_rx = port->throttle_input = port->cd_status = 0;
646 port->gs.magic = A2232_MAGIC;
647 port->gs.close_delay = HZ/2;
648 port->gs.closing_wait = 30 * HZ;
649 port->gs.rd = &a2232_real_driver;
650 }
651 }
652
653 static const struct tty_operations a2232_ops = {
654 .open = a2232_open,
655 .close = gs_close,
656 .write = gs_write,
657 .put_char = gs_put_char,
658 .flush_chars = gs_flush_chars,
659 .write_room = gs_write_room,
660 .chars_in_buffer = gs_chars_in_buffer,
661 .flush_buffer = gs_flush_buffer,
662 .ioctl = a2232_ioctl,
663 .throttle = a2232_throttle,
664 .unthrottle = a2232_unthrottle,
665 .set_termios = gs_set_termios,
666 .stop = gs_stop,
667 .start = gs_start,
668 .hangup = gs_hangup,
669 };
670
671 static int a2232_init_drivers(void)
672 {
673 int error;
674
675 a2232_driver = alloc_tty_driver(NUMLINES * nr_a2232);
676 if (!a2232_driver)
677 return -ENOMEM;
678 a2232_driver->owner = THIS_MODULE;
679 a2232_driver->driver_name = "commodore_a2232";
680 a2232_driver->name = "ttyY";
681 a2232_driver->major = A2232_NORMAL_MAJOR;
682 a2232_driver->type = TTY_DRIVER_TYPE_SERIAL;
683 a2232_driver->subtype = SERIAL_TYPE_NORMAL;
684 a2232_driver->init_termios = tty_std_termios;
685 a2232_driver->init_termios.c_cflag =
686 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
687 a2232_driver->init_termios.c_ispeed = 9600;
688 a2232_driver->init_termios.c_ospeed = 9600;
689 a2232_driver->flags = TTY_DRIVER_REAL_RAW;
690 tty_set_operations(a2232_driver, &a2232_ops);
691 if ((error = tty_register_driver(a2232_driver))) {
692 printk(KERN_ERR "A2232: Couldn't register A2232 driver, error = %d\n",
693 error);
694 put_tty_driver(a2232_driver);
695 return 1;
696 }
697 return 0;
698 }
699
700 static int __init a2232board_init(void)
701 {
702 struct zorro_dev *z;
703
704 unsigned int boardaddr;
705 int bcount;
706 short start;
707 u_char *from;
708 volatile u_char *to;
709 volatile struct a2232memory *mem;
710 int error, i;
711
712 #ifdef CONFIG_SMP
713 return -ENODEV; /* This driver is not SMP aware. Is there an SMP ZorroII-bus-machine? */
714 #endif
715
716 if (!MACH_IS_AMIGA){
717 return -ENODEV;
718 }
719
720 printk("Commodore A2232 driver initializing.\n"); /* Say that we're alive. */
721
722 z = NULL;
723 nr_a2232 = 0;
724 while ( (z = zorro_find_device(ZORRO_WILDCARD, z)) ){
725 if ( (z->id != ZORRO_PROD_CBM_A2232_PROTOTYPE) &&
726 (z->id != ZORRO_PROD_CBM_A2232) ){
727 continue; // The board found was no A2232
728 }
729 if (!zorro_request_device(z,"A2232 driver"))
730 continue;
731
732 printk("Commodore A2232 found (#%d).\n",nr_a2232);
733
734 zd_a2232[nr_a2232] = z;
735
736 boardaddr = ZTWO_VADDR( z->resource.start );
737 printk("Board is located at address 0x%x, size is 0x%x.\n", boardaddr, (unsigned int) ((z->resource.end+1) - (z->resource.start)));
738
739 mem = (volatile struct a2232memory *) boardaddr;
740
741 (void) mem->Enable6502Reset; /* copy the code across to the board */
742 to = (u_char *)mem; from = a2232_65EC02code; bcount = sizeof(a2232_65EC02code) - 2;
743 start = *(short *)from;
744 from += sizeof(start);
745 to += start;
746 while(bcount--) *to++ = *from++;
747 printk("65EC02 software uploaded to the A2232 memory.\n");
748
749 mem->Common.Crystal = A2232_UNKNOWN; /* use automatic speed check */
750
751 /* start 6502 running */
752 (void) mem->ResetBoard;
753 printk("A2232's 65EC02 CPU up and running.\n");
754
755 /* wait until speed detector has finished */
756 for (bcount = 0; bcount < 2000; bcount++) {
757 udelay(1000);
758 if (mem->Common.Crystal)
759 break;
760 }
761 printk((mem->Common.Crystal?"A2232 oscillator crystal detected by 65EC02 software: ":"65EC02 software could not determine A2232 oscillator crystal: "));
762 switch (mem->Common.Crystal){
763 case A2232_UNKNOWN:
764 printk("Unknown crystal.\n");
765 break;
766 case A2232_NORMAL:
767 printk ("Normal crystal.\n");
768 break;
769 case A2232_TURBO:
770 printk ("Turbo crystal.\n");
771 break;
772 default:
773 printk ("0x%x. Huh?\n",mem->Common.Crystal);
774 }
775
776 nr_a2232++;
777
778 }
779
780 printk("Total: %d A2232 boards initialized.\n", nr_a2232); /* Some status report if no card was found */
781
782 a2232_init_portstructs();
783
784 /*
785 a2232_init_drivers also registers the drivers. Must be here because all boards
786 have to be detected first.
787 */
788 if (a2232_init_drivers()) return -ENODEV; // maybe we should use a different -Exxx?
789
790 error = request_irq(IRQ_AMIGA_VERTB, a2232_vbl_inter, 0,
791 "A2232 serial VBL", a2232_driver_ID);
792 if (error) {
793 for (i = 0; i < nr_a2232; i++)
794 zorro_release_device(zd_a2232[i]);
795 tty_unregister_driver(a2232_driver);
796 put_tty_driver(a2232_driver);
797 }
798 return error;
799 }
800
801 static void __exit a2232board_exit(void)
802 {
803 int i;
804
805 for (i = 0; i < nr_a2232; i++) {
806 zorro_release_device(zd_a2232[i]);
807 }
808
809 tty_unregister_driver(a2232_driver);
810 put_tty_driver(a2232_driver);
811 free_irq(IRQ_AMIGA_VERTB, a2232_driver_ID);
812 }
813
814 module_init(a2232board_init);
815 module_exit(a2232board_exit);
816
817 MODULE_AUTHOR("Enver Haase");
818 MODULE_DESCRIPTION("Amiga A2232 multi-serial board driver");
819 MODULE_LICENSE("GPL");
Tomato firmware and modifications.