1 /* $Id: aurora.c,v 1.19 2002/01/08 16:00:16 davem Exp $
2 * linux/drivers/sbus/char/aurora.c -- Aurora multiport driver
4 * Copyright (c) 1999 by Oliver Aldulea (oli at bv dot ro)
6 * This code is based on the RISCom/8 multiport serial driver written
7 * by Dmitry Gorodchanin (pgmdsg@ibi.com), based on the Linux serial
8 * driver, written by Linus Torvalds, Theodore T'so and others.
9 * The Aurora multiport programming info was obtained mainly from the
10 * Cirrus Logic CD180 documentation (available on the web), and by
11 * doing heavy tests on the board. Many thanks to Eddie C. Dost for the
12 * help on the sbus interface.
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 * This is the first public release.
32 * Most of the information you need is in the aurora.h file. Please
33 * read that file before reading this one.
35 * Several parts of the code do not have comments yet.
37 * n.b. The board can support 115.2 bit rates, but only on a few
38 * ports. The total badwidth of one chip (ports 0-7 or 8-15) is equal
39 * to OSC_FREQ div 16. In case of my board, each chip can take 6
40 * channels of 115.2 kbaud. This information is not well-tested.
42 * Fixed to use tty_get_baud_rate().
43 * Theodore Ts'o <tytso@mit.edu>, 2001-Oct-12
46 #include <linux/module.h>
48 #include <linux/errno.h>
49 #include <linux/sched.h>
50 #ifdef AURORA_INT_DEBUG
51 #include <linux/timer.h>
53 #include <linux/interrupt.h>
54 #include <linux/tty.h>
55 #include <linux/tty_flip.h>
56 #include <linux/major.h>
57 #include <linux/string.h>
58 #include <linux/fcntl.h>
60 #include <linux/kernel.h>
61 #include <linux/init.h>
62 #include <linux/delay.h>
63 #include <linux/bitops.h>
67 #include <asm/oplib.h>
68 #include <asm/system.h>
69 #include <asm/kdebug.h>
71 #include <asm/uaccess.h>
76 unsigned char irqs[4] = {
80 #ifdef AURORA_INT_DEBUG
85 #define MIN(a,b) ((a) < (b) ? (a) : (b))
88 static struct tty_driver *aurora_driver;
89 static struct Aurora_board aurora_board[AURORA_NBOARD] = {
93 static struct Aurora_port aurora_port[AURORA_TNPORTS] = {
97 /* no longer used. static struct Aurora_board * IRQ_to_board[16] = { NULL, } ;*/
98 static unsigned char * tmp_buf = NULL;
99 static DECLARE_MUTEX(tmp_buf_sem);
101 DECLARE_TASK_QUEUE(tq_aurora);
103 static inline int aurora_paranoia_check(struct Aurora_port const * port,
104 char *name, const char *routine)
106 #ifdef AURORA_PARANOIA_CHECK
107 static const char *badmagic =
108 KERN_DEBUG "aurora: Warning: bad aurora port magic number for device %s in %s\n";
109 static const char *badinfo =
110 KERN_DEBUG "aurora: Warning: null aurora port for device %s in %s\n";
113 printk(badinfo, name, routine);
116 if (port->magic != AURORA_MAGIC) {
117 printk(badmagic, name, routine);
126 * Service functions for aurora driver.
130 /* Get board number from pointer */
131 extern inline int board_No (struct Aurora_board const * bp)
133 return bp - aurora_board;
136 /* Get port number from pointer */
137 extern inline int port_No (struct Aurora_port const * port)
139 return AURORA_PORT(port - aurora_port);
142 /* Get pointer to board from pointer to port */
143 extern inline struct Aurora_board * port_Board(struct Aurora_port const * port)
145 return &aurora_board[AURORA_BOARD(port - aurora_port)];
148 /* Wait for Channel Command Register ready */
149 extern inline void aurora_wait_CCR(struct aurora_reg128 * r)
154 printk("aurora_wait_CCR\n");
156 /* FIXME: need something more descriptive than 100000 :) */
157 for (delay = 100000; delay; delay--)
158 if (!sbus_readb(&r->r[CD180_CCR]))
160 printk(KERN_DEBUG "aurora: Timeout waiting for CCR.\n");
164 * aurora probe functions.
167 /* Must be called with enabled interrupts */
168 extern inline void aurora_long_delay(unsigned long delay)
173 printk("aurora_long_delay: start\n");
175 for (i = jiffies + delay; time_before(jiffies, i); ) ;
177 printk("aurora_long_delay: end\n");
181 /* Reset and setup CD180 chip */
182 static int aurora_init_CD180(struct Aurora_board * bp, int chip)
188 printk("aurora_init_CD180: start %d:%d\n",
191 save_flags(flags); cli();
192 sbus_writeb(0, &bp->r[chip]->r[CD180_CAR]);
193 sbus_writeb(0, &bp->r[chip]->r[CD180_GSVR]);
195 /* Wait for CCR ready */
196 aurora_wait_CCR(bp->r[chip]);
198 /* Reset CD180 chip */
199 sbus_writeb(CCR_HARDRESET, &bp->r[chip]->r[CD180_CCR]);
204 (sbus_readb(&bp->r[chip]->r[CD180_GSVR])!=0xff))udelay(100);
206 printk(KERN_ERR "aurora%d: Chip %d failed init.\n",
208 restore_flags(flags);
212 sbus_writeb((board_No(bp)<<5)|((chip+1)<<3),
213 &bp->r[chip]->r[CD180_GSVR]); /* Set ID for this chip */
214 sbus_writeb(0x80|bp->ACK_MINT,
215 &bp->r[chip]->r[CD180_MSMR]); /* Prio for modem intr */
216 sbus_writeb(0x80|bp->ACK_TINT,
217 &bp->r[chip]->r[CD180_TSMR]); /* Prio for transmitter intr */
218 sbus_writeb(0x80|bp->ACK_RINT,
219 &bp->r[chip]->r[CD180_RSMR]); /* Prio for receiver intr */
220 /* Setting up prescaler. We need 4 tick per 1 ms */
221 sbus_writeb((bp->oscfreq/(1000000/AURORA_TPS)) >> 8,
222 &bp->r[chip]->r[CD180_PPRH]);
223 sbus_writeb((bp->oscfreq/(1000000/AURORA_TPS)) & 0xff,
224 &bp->r[chip]->r[CD180_PPRL]);
226 sbus_writeb(SRCR_AUTOPRI|SRCR_GLOBPRI,
227 &bp->r[chip]->r[CD180_SRCR]);
229 id = sbus_readb(&bp->r[chip]->r[CD180_GFRCR]);
230 printk(KERN_INFO "aurora%d: Chip %d id %02x: ",
231 board_No(bp), chip,id);
232 if(sbus_readb(&bp->r[chip]->r[CD180_SRCR]) & 128) {
234 case 0x82:printk("CL-CD1864 rev A\n");break;
235 case 0x83:printk("CL-CD1865 rev A\n");break;
236 case 0x84:printk("CL-CD1865 rev B\n");break;
237 case 0x85:printk("CL-CD1865 rev C\n");break;
238 default:printk("Unknown.\n");
242 case 0x81:printk("CL-CD180 rev B\n");break;
243 case 0x82:printk("CL-CD180 rev C\n");break;
244 default:printk("Unknown.\n");
247 restore_flags(flags);
249 printk("aurora_init_CD180: end\n");
254 static int valid_irq(unsigned char irq)
257 for(i=0;i<TYPE_1_IRQS;i++)
258 if (type_1_irq[i]==irq) return 1;
262 static irqreturn_t aurora_interrupt(int irq, void * dev_id, struct pt_regs * regs);
264 /* Main probing routine, also sets irq. */
265 static int aurora_probe(void)
267 struct sbus_bus *sbus;
268 struct sbus_dev *sdev;
272 struct Aurora_board *bp;
274 for_each_sbus(sbus) {
275 for_each_sbusdev(sdev, sbus) {
276 /* printk("Try: %x %s\n",sdev,sdev->prom_name);*/
277 if (!strcmp(sdev->prom_name, "sio16")) {
279 printk(KERN_INFO "aurora: sio16 at %p\n",sdev);
281 if((sdev->reg_addrs[0].reg_size!=1) &&
282 (sdev->reg_addrs[1].reg_size!=128) &&
283 (sdev->reg_addrs[2].reg_size!=128) &&
284 (sdev->reg_addrs[3].reg_size!=4)) {
285 printk(KERN_ERR "aurora%d: registers' sizes "
286 "do not match.\n", bn);
289 bp = &aurora_board[bn];
290 bp->r0 = (struct aurora_reg1 *)
291 sbus_ioremap(&sdev->resource[0], 0,
292 sdev->reg_addrs[0].reg_size,
294 if (bp->r0 == NULL) {
295 printk(KERN_ERR "aurora%d: can't map "
296 "reg_addrs[0]\n", bn);
300 printk("Map reg 0: %p\n", bp->r0);
302 bp->r[0] = (struct aurora_reg128 *)
303 sbus_ioremap(&sdev->resource[1], 0,
304 sdev->reg_addrs[1].reg_size,
306 if (bp->r[0] == NULL) {
307 printk(KERN_ERR "aurora%d: can't map "
308 "reg_addrs[1]\n", bn);
312 printk("Map reg 1: %p\n", bp->r[0]);
314 bp->r[1] = (struct aurora_reg128 *)
315 sbus_ioremap(&sdev->resource[2], 0,
316 sdev->reg_addrs[2].reg_size,
318 if (bp->r[1] == NULL) {
319 printk(KERN_ERR "aurora%d: can't map "
320 "reg_addrs[2]\n", bn);
324 printk("Map reg 2: %p\n", bp->r[1]);
326 bp->r3 = (struct aurora_reg4 *)
327 sbus_ioremap(&sdev->resource[3], 0,
328 sdev->reg_addrs[3].reg_size,
330 if (bp->r3 == NULL) {
331 printk(KERN_ERR "aurora%d: can't map "
332 "reg_addrs[3]\n", bn);
336 printk("Map reg 3: %p\n", bp->r3);
338 /* Variables setup */
341 grrr=prom_getint(sdev->prom_node,"intr");
342 printk("intr pri %d\n", grrr);
344 if ((bp->irq=irqs[bn]) && valid_irq(bp->irq) &&
345 !request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
346 free_irq(bp->irq|0x30, bp);
348 if ((bp->irq=prom_getint(sdev->prom_node, "bintr")) && valid_irq(bp->irq) &&
349 !request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
350 free_irq(bp->irq|0x30, bp);
352 if ((bp->irq=prom_getint(sdev->prom_node, "intr")) && valid_irq(bp->irq) &&
353 !request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
354 free_irq(bp->irq|0x30, bp);
356 for(grrr=0;grrr<TYPE_1_IRQS;grrr++) {
357 if ((bp->irq=type_1_irq[grrr])&&!request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
358 free_irq(bp->irq|0x30, bp);
361 printk(KERN_ERR "aurora%d: Could not get an irq for this board !!!\n",bn);
365 if(bp->flags==0xff)break;
366 printk(KERN_INFO "aurora%d: irq %d\n",bn,bp->irq&0x0f);
368 grrr=prom_getproperty(sdev->prom_node,"dtr_rts",buf,sizeof(buf));
369 if(!strcmp(buf,"swapped")){
370 printk(KERN_INFO "aurora%d: Swapped DTR and RTS\n",bn);
373 bp->MSVDTR=CD180_MSVRTS;
374 bp->MSVRTS=CD180_MSVDTR;
375 bp->flags|=AURORA_BOARD_DTR_FLOW_OK;
377 #ifdef AURORA_FORCE_DTR_FLOW
378 printk(KERN_INFO "aurora%d: Forcing swapped DTR-RTS\n",bn);
381 bp->MSVDTR=CD180_MSVRTS;
382 bp->MSVRTS=CD180_MSVDTR;
383 bp->flags|=AURORA_BOARD_DTR_FLOW_OK;
385 printk(KERN_INFO "aurora%d: Normal DTR and RTS\n",bn);
388 bp->MSVDTR=CD180_MSVDTR;
389 bp->MSVRTS=CD180_MSVRTS;
392 bp->oscfreq=prom_getint(sdev->prom_node,"clk")*100;
393 printk(KERN_INFO "aurora%d: Oscillator: %d Hz\n",bn,bp->oscfreq);
394 grrr=prom_getproperty(sdev->prom_node,"chip",buf,sizeof(buf));
395 printk(KERN_INFO "aurora%d: Chips: %s\n",bn,buf);
396 grrr=prom_getproperty(sdev->prom_node,"manu",buf,sizeof(buf));
397 printk(KERN_INFO "aurora%d: Manufacturer: %s\n",bn,buf);
398 grrr=prom_getproperty(sdev->prom_node,"model",buf,sizeof(buf));
399 printk(KERN_INFO "aurora%d: Model: %s\n",bn,buf);
400 grrr=prom_getproperty(sdev->prom_node,"rev",buf,sizeof(buf));
401 printk(KERN_INFO "aurora%d: Revision: %s\n",bn,buf);
402 grrr=prom_getproperty(sdev->prom_node,"mode",buf,sizeof(buf));
403 printk(KERN_INFO "aurora%d: Mode: %s\n",bn,buf);
407 bp->flags = AURORA_BOARD_PRESENT;
419 static void aurora_release_io_range(struct Aurora_board *bp)
421 sbus_iounmap((unsigned long)bp->r0, 1);
422 sbus_iounmap((unsigned long)bp->r[0], 128);
423 sbus_iounmap((unsigned long)bp->r[1], 128);
424 sbus_iounmap((unsigned long)bp->r3, 4);
427 extern inline void aurora_mark_event(struct Aurora_port * port, int event)
430 printk("aurora_mark_event: start\n");
432 set_bit(event, &port->event);
433 queue_task(&port->tqueue, &tq_aurora);
436 printk("aurora_mark_event: end\n");
440 static __inline__ struct Aurora_port * aurora_get_port(struct Aurora_board const * bp,
442 unsigned char const *what)
444 unsigned char channel;
445 struct Aurora_port * port;
447 channel = ((chip << 3) |
448 ((sbus_readb(&bp->r[chip]->r[CD180_GSCR]) & GSCR_CHAN) >> GSCR_CHAN_OFF));
449 port = &aurora_port[board_No(bp) * AURORA_NPORT * AURORA_NCD180 + channel];
450 if (port->flags & ASYNC_INITIALIZED)
453 printk(KERN_DEBUG "aurora%d: %s interrupt from invalid port %d\n",
454 board_No(bp), what, channel);
458 static void aurora_receive_exc(struct Aurora_board const * bp, int chip)
460 struct Aurora_port *port;
461 struct tty_struct *tty;
462 unsigned char status;
465 if (!(port = aurora_get_port(bp, chip, "Receive_x")))
469 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
470 #ifdef AURORA_INTNORM
471 printk("aurora%d: port %d: Working around flip buffer overflow.\n",
472 board_No(bp), port_No(port));
477 #ifdef AURORA_REPORT_OVERRUN
478 status = sbus_readb(&bp->r[chip]->r[CD180_RCSR]);
479 if (status & RCSR_OE) {
482 printk("aurora%d: port %d: Overrun. Total %ld overruns.\n",
483 board_No(bp), port_No(port), port->overrun);
486 status &= port->mark_mask;
488 status = sbus_readb(&bp->r[chip]->r[CD180_RCSR]) & port->mark_mask;
490 ch = sbus_readb(&bp->r[chip]->r[CD180_RDR]);
494 if (status & RCSR_TOUT) {
495 /* printk("aurora%d: port %d: Receiver timeout. Hardware problems ?\n",
496 board_No(bp), port_No(port));*/
499 } else if (status & RCSR_BREAK) {
500 printk(KERN_DEBUG "aurora%d: port %d: Handling break...\n",
501 board_No(bp), port_No(port));
502 *tty->flip.flag_buf_ptr++ = TTY_BREAK;
503 if (port->flags & ASYNC_SAK)
506 } else if (status & RCSR_PE)
507 *tty->flip.flag_buf_ptr++ = TTY_PARITY;
509 else if (status & RCSR_FE)
510 *tty->flip.flag_buf_ptr++ = TTY_FRAME;
512 else if (status & RCSR_OE)
513 *tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
516 *tty->flip.flag_buf_ptr++ = 0;
518 *tty->flip.char_buf_ptr++ = ch;
520 queue_task(&tty->flip.tqueue, &tq_timer);
523 static void aurora_receive(struct Aurora_board const * bp, int chip)
525 struct Aurora_port *port;
526 struct tty_struct *tty;
527 unsigned char count,cnt;
529 if (!(port = aurora_get_port(bp, chip, "Receive")))
534 count = sbus_readb(&bp->r[chip]->r[CD180_RDCR]);
536 #ifdef AURORA_REPORT_FIFO
537 port->hits[count > 8 ? 9 : count]++;
541 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
542 #ifdef AURORA_INTNORM
543 printk("aurora%d: port %d: Working around flip buffer overflow.\n",
544 board_No(bp), port_No(port));
548 cnt = sbus_readb(&bp->r[chip]->r[CD180_RDR]);
549 *tty->flip.char_buf_ptr++ = cnt;
550 *tty->flip.flag_buf_ptr++ = 0;
553 queue_task(&tty->flip.tqueue, &tq_timer);
556 static void aurora_transmit(struct Aurora_board const * bp, int chip)
558 struct Aurora_port *port;
559 struct tty_struct *tty;
562 if (!(port = aurora_get_port(bp, chip, "Transmit")))
567 if (port->SRER & SRER_TXEMPTY) {
569 sbus_writeb(port_No(port) & 7,
570 &bp->r[chip]->r[CD180_CAR]);
572 port->SRER &= ~SRER_TXEMPTY;
573 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
577 if ((port->xmit_cnt <= 0 && !port->break_length)
578 || tty->stopped || tty->hw_stopped) {
579 sbus_writeb(port_No(port) & 7,
580 &bp->r[chip]->r[CD180_CAR]);
582 port->SRER &= ~SRER_TXRDY;
583 sbus_writeb(port->SRER,
584 &bp->r[chip]->r[CD180_SRER]);
588 if (port->break_length) {
589 if (port->break_length > 0) {
590 if (port->COR2 & COR2_ETC) {
591 sbus_writeb(CD180_C_ESC,
592 &bp->r[chip]->r[CD180_TDR]);
593 sbus_writeb(CD180_C_SBRK,
594 &bp->r[chip]->r[CD180_TDR]);
595 port->COR2 &= ~COR2_ETC;
597 count = MIN(port->break_length, 0xff);
598 sbus_writeb(CD180_C_ESC,
599 &bp->r[chip]->r[CD180_TDR]);
600 sbus_writeb(CD180_C_DELAY,
601 &bp->r[chip]->r[CD180_TDR]);
603 &bp->r[chip]->r[CD180_TDR]);
604 if (!(port->break_length -= count))
605 port->break_length--;
607 sbus_writeb(CD180_C_ESC,
608 &bp->r[chip]->r[CD180_TDR]);
609 sbus_writeb(CD180_C_EBRK,
610 &bp->r[chip]->r[CD180_TDR]);
611 sbus_writeb(port->COR2,
612 &bp->r[chip]->r[CD180_COR2]);
613 aurora_wait_CCR(bp->r[chip]);
614 sbus_writeb(CCR_CORCHG2,
615 &bp->r[chip]->r[CD180_CCR]);
616 port->break_length = 0;
623 u8 byte = port->xmit_buf[port->xmit_tail++];
625 sbus_writeb(byte, &bp->r[chip]->r[CD180_TDR]);
626 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1);
627 if (--port->xmit_cnt <= 0)
629 } while (--count > 0);
631 if (port->xmit_cnt <= 0) {
632 sbus_writeb(port_No(port) & 7,
633 &bp->r[chip]->r[CD180_CAR]);
635 port->SRER &= ~SRER_TXRDY;
636 sbus_writeb(port->SRER,
637 &bp->r[chip]->r[CD180_SRER]);
639 if (port->xmit_cnt <= port->wakeup_chars)
640 aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
643 static void aurora_check_modem(struct Aurora_board const * bp, int chip)
645 struct Aurora_port *port;
646 struct tty_struct *tty;
649 if (!(port = aurora_get_port(bp, chip, "Modem")))
654 mcr = sbus_readb(&bp->r[chip]->r[CD180_MCR]);
655 if (mcr & MCR_CDCHG) {
656 if (sbus_readb(&bp->r[chip]->r[CD180_MSVR]) & MSVR_CD)
657 wake_up_interruptible(&port->open_wait);
659 schedule_task(&port->tqueue_hangup);
662 /* We don't have such things yet. My aurora board has DTR and RTS swapped, but that doesn't count in this driver. Let's hope
663 * Aurora didn't made any boards with CTS or DSR broken...
665 /* #ifdef AURORA_BRAIN_DAMAGED_CTS
666 if (mcr & MCR_CTSCHG) {
667 if (aurora_in(bp, CD180_MSVR) & MSVR_CTS) {
669 port->SRER |= SRER_TXRDY;
670 if (port->xmit_cnt <= port->wakeup_chars)
671 aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
674 port->SRER &= ~SRER_TXRDY;
676 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
678 if (mcr & MCR_DSRCHG) {
679 if (aurora_in(bp, CD180_MSVR) & MSVR_DSR) {
681 port->SRER |= SRER_TXRDY;
682 if (port->xmit_cnt <= port->wakeup_chars)
683 aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
686 port->SRER &= ~SRER_TXRDY;
688 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
690 #endif AURORA_BRAIN_DAMAGED_CTS */
692 /* Clear change bits */
693 sbus_writeb(0, &bp->r[chip]->r[CD180_MCR]);
696 /* The main interrupt processing routine */
697 static irqreturn_t aurora_interrupt(int irq, void * dev_id, struct pt_regs * regs)
699 unsigned char status;
700 unsigned char ack,chip/*,chip_id*/;
701 struct Aurora_board * bp = (struct Aurora_board *) dev_id;
702 unsigned long loop = 0;
704 #ifdef AURORA_INT_DEBUG
705 printk("IRQ%d %d\n",irq,++irqhit);
706 #ifdef AURORA_FLOODPRO
707 if (irqhit>=AURORA_FLOODPRO)
708 sbus_writeb(8, &bp->r0->r);
712 /* old bp = IRQ_to_board[irq&0x0f];*/
714 if (!bp || !(bp->flags & AURORA_BOARD_ACTIVE))
717 /* The while() below takes care of this.
718 status = sbus_readb(&bp->r[0]->r[CD180_SRSR]);
719 #ifdef AURORA_INT_DEBUG
720 printk("mumu: %02x\n", status);
722 if (!(status&SRSR_ANYINT))
723 return IRQ_NONE; * Nobody has anything to say, so exit *
725 while ((loop++ < 48) &&
726 (status = sbus_readb(&bp->r[0]->r[CD180_SRSR]) & SRSR_ANYINT)){
727 #ifdef AURORA_INT_DEBUG
728 printk("SRSR: %02x\n", status);
730 if (status & SRSR_REXT) {
731 ack = sbus_readb(&bp->r3->r[bp->ACK_RINT]);
732 #ifdef AURORA_INT_DEBUG
733 printk("R-ACK %02x\n", ack);
735 if ((ack >> 5) == board_No(bp)) {
736 if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
737 if ((ack&GSVR_ITMASK)==GSVR_IT_RGD) {
738 aurora_receive(bp,chip);
740 &bp->r[chip]->r[CD180_EOSRR]);
741 } else if ((ack & GSVR_ITMASK) == GSVR_IT_REXC) {
742 aurora_receive_exc(bp,chip);
744 &bp->r[chip]->r[CD180_EOSRR]);
748 } else if (status & SRSR_TEXT) {
749 ack = sbus_readb(&bp->r3->r[bp->ACK_TINT]);
750 #ifdef AURORA_INT_DEBUG
751 printk("T-ACK %02x\n", ack);
753 if ((ack >> 5) == board_No(bp)) {
754 if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
755 if ((ack&GSVR_ITMASK)==GSVR_IT_TX) {
756 aurora_transmit(bp,chip);
758 &bp->r[chip]->r[CD180_EOSRR]);
762 } else if (status & SRSR_MEXT) {
763 ack = sbus_readb(&bp->r3->r[bp->ACK_MINT]);
764 #ifdef AURORA_INT_DEBUG
765 printk("M-ACK %02x\n", ack);
767 if ((ack >> 5) == board_No(bp)) {
768 if ((chip = ((ack>>3)&3)-1) < AURORA_NCD180) {
769 if ((ack&GSVR_ITMASK)==GSVR_IT_MDM) {
770 aurora_check_modem(bp,chip);
772 &bp->r[chip]->r[CD180_EOSRR]);
778 /* I guess this faster code can be used with CD1865, using AUROPRI and GLOBPRI. */
780 while ((loop++ < 48)&&(status=bp->r[0]->r[CD180_SRSR]&SRSR_ANYINT)){
781 #ifdef AURORA_INT_DEBUG
782 printk("SRSR: %02x\n",status);
784 ack = sbus_readb(&bp->r3->r[0]);
785 #ifdef AURORA_INT_DEBUG
786 printk("ACK: %02x\n",ack);
788 if ((ack>>5)==board_No(bp)) {
789 if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
791 if (ack==GSVR_IT_RGD) {
792 aurora_receive(bp,chip);
794 &bp->r[chip]->r[CD180_EOSRR]);
795 } else if (ack==GSVR_IT_REXC) {
796 aurora_receive_exc(bp,chip);
798 &bp->r[chip]->r[CD180_EOSRR]);
799 } else if (ack==GSVR_IT_TX) {
800 aurora_transmit(bp,chip);
802 &bp->r[chip]->r[CD180_EOSRR]);
803 } else if (ack==GSVR_IT_MDM) {
804 aurora_check_modem(bp,chip);
806 &bp->r[chip]->r[CD180_EOSRR]);
813 /* This is the old handling routine, used in riscom8 for only one CD180. I keep it here for reference. */
815 for(chip=0;chip<AURORA_NCD180;chip++){
816 chip_id=(board_No(bp)<<5)|((chip+1)<<3);
818 while ((loop++ < 1) &&
819 ((status = sbus_readb(&bp->r[chip]->r[CD180_SRSR])) &
820 (SRSR_TEXT | SRSR_MEXT | SRSR_REXT))) {
822 if (status & SRSR_REXT) {
823 ack = sbus_readb(&bp->r3->r[bp->ACK_RINT]);
824 if (ack == (chip_id | GSVR_IT_RGD)) {
828 aurora_receive(bp,chip);
829 } else if (ack == (chip_id | GSVR_IT_REXC)) {
833 aurora_receive_exc(bp,chip);
835 #ifdef AURORA_INTNORM
836 printk("aurora%d-%d: Bad receive ack 0x%02x.\n",
837 board_No(bp), chip, ack);
840 } else if (status & SRSR_TEXT) {
841 ack = sbus_readb(&bp->r3->r[bp->ACK_TINT]);
842 if (ack == (chip_id | GSVR_IT_TX)){
846 aurora_transmit(bp,chip);
848 #ifdef AURORA_INTNORM
849 printk("aurora%d-%d: Bad transmit ack 0x%02x.\n",
850 board_No(bp), chip, ack);
853 } else if (status & SRSR_MEXT) {
854 ack = sbus_readb(&bp->r3->r[bp->ACK_MINT]);
855 if (ack == (chip_id | GSVR_IT_MDM)){
859 aurora_check_modem(bp,chip);
861 #ifdef AURORA_INTNORM
862 printk("aurora%d-%d: Bad modem ack 0x%02x.\n",
863 board_No(bp), chip, ack);
867 sbus_writeb(0, &bp->r[chip]->r[CD180_EOSRR]);
875 #ifdef AURORA_INT_DEBUG
876 static void aurora_timer (unsigned long ignored);
878 static struct timer_list aurora_poll_timer =
879 TIMER_INITIALIZER(aurora_timer, 0, 0);
882 aurora_timer (unsigned long ignored)
887 save_flags(flags); cli();
889 printk("SRSR: %02x,%02x - ",
890 sbus_readb(&aurora_board[0].r[0]->r[CD180_SRSR]),
891 sbus_readb(&aurora_board[0].r[1]->r[CD180_SRSR]));
892 for (i = 0; i < 4; i++) {
895 sbus_readb(&aurora_board[0].r3->r[i]));
899 aurora_poll_timer.expires = jiffies + 300;
900 add_timer (&aurora_poll_timer);
902 restore_flags(flags);
907 * Routines for open & close processing.
910 /* Called with disabled interrupts */
911 static int aurora_setup_board(struct Aurora_board * bp)
917 for (i = 0; i < AURORA_ALLIRQ; i++) {
918 error = request_irq(allirq[i]|0x30, aurora_interrupt, SA_SHIRQ,
921 printk(KERN_ERR "IRQ%d request error %d\n",
925 error = request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ,
928 printk(KERN_ERR "IRQ request error %d\n", error);
933 sbus_writeb(0, &bp->r0->r);
935 if (bp->flags & AURORA_BOARD_TYPE_2) {
938 sbus_writeb((AURORA_CFG_ENABLE_IO | AURORA_CFG_ENABLE_IRQ |
939 (((bp->irq)&0x0f)>>2)),
944 if (aurora_init_CD180(bp,0))error=1;error=0;
945 if (aurora_init_CD180(bp,1))error++;
946 if (error == AURORA_NCD180) {
947 printk(KERN_ERR "Both chips failed initialisation.\n");
951 #ifdef AURORA_INT_DEBUG
952 aurora_poll_timer.expires= jiffies + 1;
953 add_timer(&aurora_poll_timer);
956 printk("aurora_setup_board: end\n");
961 /* Called with disabled interrupts */
962 static void aurora_shutdown_board(struct Aurora_board *bp)
967 printk("aurora_shutdown_board: start\n");
970 #ifdef AURORA_INT_DEBUG
971 del_timer(&aurora_poll_timer);
975 for(i=0;i<AURORA_ALLIRQ;i++){
976 free_irq(allirq[i]|0x30, bp);
977 /* IRQ_to_board[allirq[i]&0xf] = NULL;*/
980 free_irq(bp->irq|0x30, bp);
981 /* IRQ_to_board[bp->irq&0xf] = NULL;*/
985 sbus_writeb(i & 7, &bp->r[i>>3]->r[CD180_CAR]);
987 sbus_writeb(0, &bp->r[i>>3]->r[CD180_MSVR]);
991 sbus_writeb(0, &bp->r0->r);
994 printk("aurora_shutdown_board: end\n");
998 /* Setting up port characteristics.
999 * Must be called with disabled interrupts
1001 static void aurora_change_speed(struct Aurora_board *bp, struct Aurora_port *port)
1003 struct tty_struct *tty;
1006 unsigned char cor1 = 0, cor3 = 0;
1007 unsigned char mcor1 = 0, mcor2 = 0,chip;
1010 printk("aurora_change_speed: start\n");
1012 if (!(tty = port->tty) || !tty->termios)
1015 chip = AURORA_CD180(port_No(port));
1019 port->MSVR = MSVR_RTS|MSVR_DTR;
1021 baud = tty_get_baud_rate(tty);
1023 /* Select port on the board */
1024 sbus_writeb(port_No(port) & 7,
1025 &bp->r[chip]->r[CD180_CAR]);
1029 /* Drop DTR & exit */
1030 port->MSVR &= ~(bp->DTR|bp->RTS);
1031 sbus_writeb(port->MSVR,
1032 &bp->r[chip]->r[CD180_MSVR]);
1036 port->MSVR |= bp->DTR;
1037 sbus_writeb(port->MSVR,
1038 &bp->r[chip]->r[CD180_MSVR]);
1041 /* Now we must calculate some speed dependent things. */
1043 /* Set baud rate for port. */
1044 tmp = (((bp->oscfreq + baud/2) / baud +
1045 CD180_TPC/2) / CD180_TPC);
1047 /* tmp = (bp->oscfreq/7)/baud;
1048 if((tmp%10)>4)tmp=tmp/10+1;else tmp=tmp/10;*/
1049 /* printk("Prescaler period: %d\n",tmp);*/
1051 sbus_writeb((tmp >> 8) & 0xff,
1052 &bp->r[chip]->r[CD180_RBPRH]);
1053 sbus_writeb((tmp >> 8) & 0xff,
1054 &bp->r[chip]->r[CD180_TBPRH]);
1055 sbus_writeb(tmp & 0xff, &bp->r[chip]->r[CD180_RBPRL]);
1056 sbus_writeb(tmp & 0xff, &bp->r[chip]->r[CD180_TBPRL]);
1058 baud = (baud + 5) / 10; /* Estimated CPS */
1060 /* Two timer ticks seems enough to wakeup something like SLIP driver */
1061 tmp = ((baud + HZ/2) / HZ) * 2 - CD180_NFIFO;
1062 port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ?
1063 SERIAL_XMIT_SIZE - 1 : tmp);
1065 /* Receiver timeout will be transmission time for 1.5 chars */
1066 tmp = (AURORA_TPS + AURORA_TPS/2 + baud/2) / baud;
1067 tmp = (tmp > 0xff) ? 0xff : tmp;
1068 sbus_writeb(tmp, &bp->r[chip]->r[CD180_RTPR]);
1070 switch (C_CSIZE(tty)) {
1088 cor1 |= COR1_IGNORE;
1089 if (C_PARENB(tty)) {
1090 cor1 |= COR1_NORMPAR;
1094 cor1 &= ~COR1_IGNORE;
1096 /* Set marking of some errors */
1097 port->mark_mask = RCSR_OE | RCSR_TOUT;
1099 port->mark_mask |= RCSR_FE | RCSR_PE;
1100 if (I_BRKINT(tty) || I_PARMRK(tty))
1101 port->mark_mask |= RCSR_BREAK;
1103 port->mark_mask &= ~(RCSR_FE | RCSR_PE);
1104 if (I_IGNBRK(tty)) {
1105 port->mark_mask &= ~RCSR_BREAK;
1107 /* Real raw mode. Ignore all */
1108 port->mark_mask &= ~RCSR_OE;
1110 /* Enable Hardware Flow Control */
1111 if (C_CRTSCTS(tty)) {
1112 /*#ifdef AURORA_BRAIN_DAMAGED_CTS
1113 port->SRER |= SRER_DSR | SRER_CTS;
1114 mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD;
1115 mcor2 |= MCOR2_DSROD | MCOR2_CTSOD;
1116 tty->hw_stopped = !(aurora_in(bp, CD180_MSVR) & (MSVR_CTS|MSVR_DSR));
1118 port->COR2 |= COR2_CTSAE;
1120 if (bp->flags&AURORA_BOARD_DTR_FLOW_OK) {
1121 mcor1 |= AURORA_RXTH;
1124 /* Enable Software Flow Control. FIXME: I'm not sure about this */
1125 /* Some people reported that it works, but I still doubt */
1127 port->COR2 |= COR2_TXIBE;
1128 cor3 |= (COR3_FCT | COR3_SCDE);
1130 port->COR2 |= COR2_IXM;
1131 sbus_writeb(START_CHAR(tty),
1132 &bp->r[chip]->r[CD180_SCHR1]);
1133 sbus_writeb(STOP_CHAR(tty),
1134 &bp->r[chip]->r[CD180_SCHR2]);
1135 sbus_writeb(START_CHAR(tty),
1136 &bp->r[chip]->r[CD180_SCHR3]);
1137 sbus_writeb(STOP_CHAR(tty),
1138 &bp->r[chip]->r[CD180_SCHR4]);
1140 if (!C_CLOCAL(tty)) {
1141 /* Enable CD check */
1142 port->SRER |= SRER_CD;
1143 mcor1 |= MCOR1_CDZD;
1144 mcor2 |= MCOR2_CDOD;
1148 /* Enable receiver */
1149 port->SRER |= SRER_RXD;
1151 /* Set input FIFO size (1-8 bytes) */
1152 cor3 |= AURORA_RXFIFO;
1153 /* Setting up CD180 channel registers */
1154 sbus_writeb(cor1, &bp->r[chip]->r[CD180_COR1]);
1155 sbus_writeb(port->COR2, &bp->r[chip]->r[CD180_COR2]);
1156 sbus_writeb(cor3, &bp->r[chip]->r[CD180_COR3]);
1157 /* Make CD180 know about registers change */
1158 aurora_wait_CCR(bp->r[chip]);
1159 sbus_writeb(CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3,
1160 &bp->r[chip]->r[CD180_CCR]);
1161 /* Setting up modem option registers */
1162 sbus_writeb(mcor1, &bp->r[chip]->r[CD180_MCOR1]);
1163 sbus_writeb(mcor2, &bp->r[chip]->r[CD180_MCOR2]);
1164 /* Enable CD180 transmitter & receiver */
1165 aurora_wait_CCR(bp->r[chip]);
1166 sbus_writeb(CCR_TXEN | CCR_RXEN, &bp->r[chip]->r[CD180_CCR]);
1167 /* Enable interrupts */
1168 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1169 /* And finally set RTS on */
1170 sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1172 printk("aurora_change_speed: end\n");
1176 /* Must be called with interrupts enabled */
1177 static int aurora_setup_port(struct Aurora_board *bp, struct Aurora_port *port)
1179 unsigned long flags;
1182 printk("aurora_setup_port: start %d\n",port_No(port));
1184 if (port->flags & ASYNC_INITIALIZED)
1187 if (!port->xmit_buf) {
1188 /* We may sleep in get_zeroed_page() */
1191 if (!(tmp = get_zeroed_page(GFP_KERNEL)))
1194 if (port->xmit_buf) {
1196 return -ERESTARTSYS;
1198 port->xmit_buf = (unsigned char *) tmp;
1201 save_flags(flags); cli();
1204 clear_bit(TTY_IO_ERROR, &port->tty->flags);
1207 if ((port->count == 1) && ((++bp->count) == 1))
1208 bp->flags |= AURORA_BOARD_ACTIVE;
1211 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1212 aurora_change_speed(bp, port);
1213 port->flags |= ASYNC_INITIALIZED;
1215 restore_flags(flags);
1217 printk("aurora_setup_port: end\n");
1222 /* Must be called with interrupts disabled */
1223 static void aurora_shutdown_port(struct Aurora_board *bp, struct Aurora_port *port)
1225 struct tty_struct *tty;
1229 printk("aurora_shutdown_port: start\n");
1231 if (!(port->flags & ASYNC_INITIALIZED))
1234 chip = AURORA_CD180(port_No(port));
1236 #ifdef AURORA_REPORT_OVERRUN
1237 printk("aurora%d: port %d: Total %ld overruns were detected.\n",
1238 board_No(bp), port_No(port), port->overrun);
1240 #ifdef AURORA_REPORT_FIFO
1244 printk("aurora%d: port %d: FIFO hits [ ",
1245 board_No(bp), port_No(port));
1246 for (i = 0; i < 10; i++) {
1247 printk("%ld ", port->hits[i]);
1252 if (port->xmit_buf) {
1253 free_page((unsigned long) port->xmit_buf);
1254 port->xmit_buf = NULL;
1257 if (!(tty = port->tty) || C_HUPCL(tty)) {
1259 port->MSVR &= ~(bp->DTR|bp->RTS);
1260 sbus_writeb(port->MSVR,
1261 &bp->r[chip]->r[CD180_MSVR]);
1265 sbus_writeb(port_No(port) & 7,
1266 &bp->r[chip]->r[CD180_CAR]);
1270 aurora_wait_CCR(bp->r[chip]);
1271 sbus_writeb(CCR_SOFTRESET, &bp->r[chip]->r[CD180_CCR]);
1273 /* Disable all interrupts from this port */
1275 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1278 set_bit(TTY_IO_ERROR, &tty->flags);
1279 port->flags &= ~ASYNC_INITIALIZED;
1282 if (--bp->count < 0) {
1283 printk(KERN_DEBUG "aurora%d: aurora_shutdown_port: "
1284 "bad board count: %d\n",
1285 board_No(bp), bp->count);
1290 bp->flags &= ~AURORA_BOARD_ACTIVE;
1294 printk("aurora_shutdown_port: end\n");
1299 static int block_til_ready(struct tty_struct *tty, struct file * filp,
1300 struct Aurora_port *port)
1302 DECLARE_WAITQUEUE(wait, current);
1303 struct Aurora_board *bp = port_Board(port);
1310 printk("block_til_ready: start\n");
1312 chip = AURORA_CD180(port_No(port));
1314 /* If the device is in the middle of being closed, then block
1315 * until it's done, and then try again.
1317 if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
1318 interruptible_sleep_on(&port->close_wait);
1319 if (port->flags & ASYNC_HUP_NOTIFY)
1322 return -ERESTARTSYS;
1325 /* If non-blocking mode is set, or the port is not enabled,
1326 * then make the check up front and then exit.
1328 if ((filp->f_flags & O_NONBLOCK) ||
1329 (tty->flags & (1 << TTY_IO_ERROR))) {
1330 port->flags |= ASYNC_NORMAL_ACTIVE;
1337 /* Block waiting for the carrier detect and the line to become
1338 * free (i.e., not in use by the callout). While we are in
1339 * this loop, info->count is dropped by one, so that
1340 * rs_close() knows when to free things. We restore it upon
1341 * exit, either normal or abnormal.
1344 add_wait_queue(&port->open_wait, &wait);
1346 if (!tty_hung_up_p(filp))
1349 port->blocked_open++;
1352 sbus_writeb(port_No(port) & 7,
1353 &bp->r[chip]->r[CD180_CAR]);
1355 CD = sbus_readb(&bp->r[chip]->r[CD180_MSVR]) & MSVR_CD;
1358 /* auto drops DTR */
1359 sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1361 set_current_state(TASK_INTERRUPTIBLE);
1362 if (tty_hung_up_p(filp) ||
1363 !(port->flags & ASYNC_INITIALIZED)) {
1364 if (port->flags & ASYNC_HUP_NOTIFY)
1367 retval = -ERESTARTSYS;
1370 if (!(port->flags & ASYNC_CLOSING) &&
1373 if (signal_pending(current)) {
1374 retval = -ERESTARTSYS;
1379 current->state = TASK_RUNNING;
1380 remove_wait_queue(&port->open_wait, &wait);
1381 if (!tty_hung_up_p(filp))
1383 port->blocked_open--;
1387 port->flags |= ASYNC_NORMAL_ACTIVE;
1389 printk("block_til_ready: end\n");
1394 static int aurora_open(struct tty_struct * tty, struct file * filp)
1398 struct Aurora_port * port;
1399 struct Aurora_board * bp;
1400 unsigned long flags;
1403 printk("aurora_open: start\n");
1406 board = AURORA_BOARD(tty->index);
1407 if (board > AURORA_NBOARD ||
1408 !(aurora_board[board].flags & AURORA_BOARD_PRESENT)) {
1410 printk("aurora_open: error board %d present %d\n",
1411 board, aurora_board[board].flags & AURORA_BOARD_PRESENT);
1416 bp = &aurora_board[board];
1417 port = aurora_port + board * AURORA_NPORT * AURORA_NCD180 + AURORA_PORT(tty->index);
1418 if ((aurora_paranoia_check(port, tty->name, "aurora_open")) {
1420 printk("aurora_open: error paranoia check\n");
1426 tty->driver_data = port;
1429 if ((error = aurora_setup_port(bp, port))) {
1431 printk("aurora_open: error aurora_setup_port ret %d\n",error);
1436 if ((error = block_til_ready(tty, filp, port))) {
1438 printk("aurora_open: error block_til_ready ret %d\n",error);
1444 printk("aurora_open: end\n");
1449 static void aurora_close(struct tty_struct * tty, struct file * filp)
1451 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1452 struct Aurora_board *bp;
1453 unsigned long flags;
1454 unsigned long timeout;
1458 printk("aurora_close: start\n");
1461 if (!port || (aurora_paranoia_check(port, tty->name, "close"))
1464 chip = AURORA_CD180(port_No(port));
1466 save_flags(flags); cli();
1467 if (tty_hung_up_p(filp)) {
1468 restore_flags(flags);
1472 bp = port_Board(port);
1473 if ((tty->count == 1) && (port->count != 1)) {
1474 printk(KERN_DEBUG "aurora%d: aurora_close: bad port count; "
1475 "tty->count is 1, port count is %d\n",
1476 board_No(bp), port->count);
1479 if (--port->count < 0) {
1480 printk(KERN_DEBUG "aurora%d: aurora_close: bad port "
1481 "count for tty%d: %d\n",
1482 board_No(bp), port_No(port), port->count);
1486 restore_flags(flags);
1489 port->flags |= ASYNC_CLOSING;
1491 /* Now we wait for the transmit buffer to clear; and we notify
1492 * the line discipline to only process XON/XOFF characters.
1495 if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE){
1497 printk("aurora_close: waiting to flush...\n");
1499 tty_wait_until_sent(tty, port->closing_wait);
1502 /* At this point we stop accepting input. To do this, we
1503 * disable the receive line status interrupts, and tell the
1504 * interrupt driver to stop checking the data ready bit in the
1505 * line status register.
1507 port->SRER &= ~SRER_RXD;
1508 if (port->flags & ASYNC_INITIALIZED) {
1509 port->SRER &= ~SRER_TXRDY;
1510 port->SRER |= SRER_TXEMPTY;
1511 sbus_writeb(port_No(port) & 7,
1512 &bp->r[chip]->r[CD180_CAR]);
1514 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1516 * Before we drop DTR, make sure the UART transmitter
1517 * has completely drained; this is especially
1518 * important if there is a transmit FIFO!
1520 timeout = jiffies+HZ;
1521 while(port->SRER & SRER_TXEMPTY) {
1522 current->state = TASK_INTERRUPTIBLE;
1523 schedule_timeout(port->timeout);
1524 if (time_after(jiffies, timeout))
1529 printk("aurora_close: shutdown_port\n");
1531 aurora_shutdown_port(bp, port);
1532 if (tty->driver->flush_buffer)
1533 tty->driver->flush_buffer(tty);
1534 tty_ldisc_flush(tty);
1538 if (port->blocked_open) {
1539 if (port->close_delay) {
1540 current->state = TASK_INTERRUPTIBLE;
1541 schedule_timeout(port->close_delay);
1543 wake_up_interruptible(&port->open_wait);
1545 port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1546 wake_up_interruptible(&port->close_wait);
1547 restore_flags(flags);
1549 printk("aurora_close: end\n");
1553 static int aurora_write(struct tty_struct * tty,
1554 const unsigned char *buf, int count)
1556 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1557 struct Aurora_board *bp;
1559 unsigned long flags;
1563 printk("aurora_write: start %d\n",count);
1565 if ((aurora_paranoia_check(port, tty->name, "aurora_write"))
1568 chip = AURORA_CD180(port_No(port));
1570 bp = port_Board(port);
1572 if (!tty || !port->xmit_buf || !tmp_buf)
1578 c = MIN(count, MIN(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
1579 SERIAL_XMIT_SIZE - port->xmit_head));
1581 restore_flags(flags);
1584 memcpy(port->xmit_buf + port->xmit_head, buf, c);
1585 port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
1586 port->xmit_cnt += c;
1587 restore_flags(flags);
1595 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped &&
1596 !(port->SRER & SRER_TXRDY)) {
1597 port->SRER |= SRER_TXRDY;
1598 sbus_writeb(port_No(port) & 7,
1599 &bp->r[chip]->r[CD180_CAR]);
1601 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1603 restore_flags(flags);
1605 printk("aurora_write: end %d\n",total);
1610 static void aurora_put_char(struct tty_struct * tty, unsigned char ch)
1612 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1613 unsigned long flags;
1616 printk("aurora_put_char: start %c\n",ch);
1618 if ((aurora_paranoia_check(port, tty->name, "aurora_put_char"))
1621 if (!tty || !port->xmit_buf)
1624 save_flags(flags); cli();
1626 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
1627 restore_flags(flags);
1631 port->xmit_buf[port->xmit_head++] = ch;
1632 port->xmit_head &= SERIAL_XMIT_SIZE - 1;
1634 restore_flags(flags);
1636 printk("aurora_put_char: end\n");
1640 static void aurora_flush_chars(struct tty_struct * tty)
1642 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1643 unsigned long flags;
1646 /*#ifdef AURORA_DEBUG
1647 printk("aurora_flush_chars: start\n");
1649 if ((aurora_paranoia_check(port, tty->name, "aurora_flush_chars"))
1652 chip = AURORA_CD180(port_No(port));
1654 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1658 save_flags(flags); cli();
1659 port->SRER |= SRER_TXRDY;
1660 sbus_writeb(port_No(port) & 7,
1661 &port_Board(port)->r[chip]->r[CD180_CAR]);
1663 sbus_writeb(port->SRER,
1664 &port_Board(port)->r[chip]->r[CD180_SRER]);
1665 restore_flags(flags);
1666 /*#ifdef AURORA_DEBUG
1667 printk("aurora_flush_chars: end\n");
1671 static int aurora_write_room(struct tty_struct * tty)
1673 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1677 printk("aurora_write_room: start\n");
1679 if ((aurora_paranoia_check(port, tty->name, "aurora_write_room"))
1682 ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1686 printk("aurora_write_room: end\n");
1691 static int aurora_chars_in_buffer(struct tty_struct *tty)
1693 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1695 if ((aurora_paranoia_check(port, tty->name, "aurora_chars_in_buffer"))
1698 return port->xmit_cnt;
1701 static void aurora_flush_buffer(struct tty_struct *tty)
1703 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1704 unsigned long flags;
1707 printk("aurora_flush_buffer: start\n");
1709 if ((aurora_paranoia_check(port, tty->name, "aurora_flush_buffer"))
1712 save_flags(flags); cli();
1713 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1714 restore_flags(flags);
1718 printk("aurora_flush_buffer: end\n");
1722 static int aurora_tiocmget(struct tty_struct *tty, struct file *file)
1724 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1725 struct Aurora_board * bp;
1726 unsigned char status,chip;
1727 unsigned int result;
1728 unsigned long flags;
1731 printk("aurora_get_modem_info: start\n");
1733 if ((aurora_paranoia_check(port, tty->name, __FUNCTION__))
1736 chip = AURORA_CD180(port_No(port));
1738 bp = port_Board(port);
1740 save_flags(flags); cli();
1742 sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1745 status = sbus_readb(&bp->r[chip]->r[CD180_MSVR]);
1746 result = 0/*bp->r[chip]->r[AURORA_RI] & (1u << port_No(port)) ? 0 : TIOCM_RNG*/;
1748 restore_flags(flags);
1750 result |= ((status & bp->RTS) ? TIOCM_RTS : 0)
1751 | ((status & bp->DTR) ? TIOCM_DTR : 0)
1752 | ((status & MSVR_CD) ? TIOCM_CAR : 0)
1753 | ((status & MSVR_DSR) ? TIOCM_DSR : 0)
1754 | ((status & MSVR_CTS) ? TIOCM_CTS : 0);
1757 printk("aurora_get_modem_info: end\n");
1762 static int aurora_tiocmset(struct tty_struct *tty, struct file *file,
1763 unsigned int set, unsigned int clear)
1765 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1767 unsigned long flags;
1768 struct Aurora_board *bp = port_Board(port);
1772 printk("aurora_set_modem_info: start\n");
1774 if ((aurora_paranoia_check(port, tty->name, __FUNCTION__))
1777 chip = AURORA_CD180(port_No(port));
1779 save_flags(flags); cli();
1780 if (set & TIOCM_RTS)
1781 port->MSVR |= bp->RTS;
1782 if (set & TIOCM_DTR)
1783 port->MSVR |= bp->DTR;
1784 if (clear & TIOCM_RTS)
1785 port->MSVR &= ~bp->RTS;
1786 if (clear & TIOCM_DTR)
1787 port->MSVR &= ~bp->DTR;
1789 sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1792 sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1794 restore_flags(flags);
1796 printk("aurora_set_modem_info: end\n");
1801 static void aurora_send_break(struct Aurora_port * port, unsigned long length)
1803 struct Aurora_board *bp = port_Board(port);
1804 unsigned long flags;
1808 printk("aurora_send_break: start\n");
1810 chip = AURORA_CD180(port_No(port));
1812 save_flags(flags); cli();
1814 port->break_length = AURORA_TPS / HZ * length;
1815 port->COR2 |= COR2_ETC;
1816 port->SRER |= SRER_TXRDY;
1817 sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1820 sbus_writeb(port->COR2, &bp->r[chip]->r[CD180_COR2]);
1821 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1822 aurora_wait_CCR(bp->r[chip]);
1824 sbus_writeb(CCR_CORCHG2, &bp->r[chip]->r[CD180_CCR]);
1825 aurora_wait_CCR(bp->r[chip]);
1827 restore_flags(flags);
1829 printk("aurora_send_break: end\n");
1833 static int aurora_set_serial_info(struct Aurora_port * port,
1834 struct serial_struct * newinfo)
1836 struct serial_struct tmp;
1837 struct Aurora_board *bp = port_Board(port);
1839 unsigned long flags;
1842 printk("aurora_set_serial_info: start\n");
1844 if (copy_from_user(&tmp, newinfo, sizeof(tmp)))
1847 if ((tmp.irq != bp->irq) ||
1848 (tmp.port != bp->base) ||
1849 (tmp.type != PORT_CIRRUS) ||
1850 (tmp.baud_base != (bp->oscfreq + CD180_TPC/2) / CD180_TPC) ||
1851 (tmp.custom_divisor != 0) ||
1852 (tmp.xmit_fifo_size != CD180_NFIFO) ||
1853 (tmp.flags & ~AURORA_LEGAL_FLAGS))
1857 change_speed = ((port->flags & ASYNC_SPD_MASK) !=
1858 (tmp.flags & ASYNC_SPD_MASK));
1860 if (!capable(CAP_SYS_ADMIN)) {
1861 if ((tmp.close_delay != port->close_delay) ||
1862 (tmp.closing_wait != port->closing_wait) ||
1863 ((tmp.flags & ~ASYNC_USR_MASK) !=
1864 (port->flags & ~ASYNC_USR_MASK)))
1866 port->flags = ((port->flags & ~ASYNC_USR_MASK) |
1867 (tmp.flags & ASYNC_USR_MASK));
1869 port->flags = ((port->flags & ~ASYNC_FLAGS) |
1870 (tmp.flags & ASYNC_FLAGS));
1871 port->close_delay = tmp.close_delay;
1872 port->closing_wait = tmp.closing_wait;
1875 save_flags(flags); cli();
1876 aurora_change_speed(bp, port);
1877 restore_flags(flags);
1880 printk("aurora_set_serial_info: end\n");
1885 extern int aurora_get_serial_info(struct Aurora_port * port,
1886 struct serial_struct * retinfo)
1888 struct serial_struct tmp;
1889 struct Aurora_board *bp = port_Board(port);
1892 printk("aurora_get_serial_info: start\n");
1894 if (!access_ok(VERIFY_WRITE, (void *) retinfo, sizeof(tmp)))
1897 memset(&tmp, 0, sizeof(tmp));
1898 tmp.type = PORT_CIRRUS;
1899 tmp.line = port - aurora_port;
1902 tmp.flags = port->flags;
1903 tmp.baud_base = (bp->oscfreq + CD180_TPC/2) / CD180_TPC;
1904 tmp.close_delay = port->close_delay * HZ/100;
1905 tmp.closing_wait = port->closing_wait * HZ/100;
1906 tmp.xmit_fifo_size = CD180_NFIFO;
1907 copy_to_user(retinfo, &tmp, sizeof(tmp));
1909 printk("aurora_get_serial_info: end\n");
1914 static int aurora_ioctl(struct tty_struct * tty, struct file * filp,
1915 unsigned int cmd, unsigned long arg)
1918 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1922 printk("aurora_ioctl: start\n");
1924 if ((aurora_paranoia_check(port, tty->name, "aurora_ioctl"))
1928 case TCSBRK: /* SVID version: non-zero arg --> no break */
1929 retval = tty_check_change(tty);
1932 tty_wait_until_sent(tty, 0);
1934 aurora_send_break(port, HZ/4); /* 1/4 second */
1936 case TCSBRKP: /* support for POSIX tcsendbreak() */
1937 retval = tty_check_change(tty);
1940 tty_wait_until_sent(tty, 0);
1941 aurora_send_break(port, arg ? arg*(HZ/10) : HZ/4);
1944 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long *)arg);
1946 if (get_user(arg,(unsigned long *)arg))
1948 tty->termios->c_cflag =
1949 ((tty->termios->c_cflag & ~CLOCAL) |
1950 (arg ? CLOCAL : 0));
1953 return aurora_get_serial_info(port, (struct serial_struct *) arg);
1955 return aurora_set_serial_info(port, (struct serial_struct *) arg);
1957 return -ENOIOCTLCMD;
1960 printk("aurora_ioctl: end\n");
1965 static void aurora_throttle(struct tty_struct * tty)
1967 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1968 struct Aurora_board *bp;
1969 unsigned long flags;
1973 printk("aurora_throttle: start\n");
1975 if ((aurora_paranoia_check(port, tty->name, "aurora_throttle"))
1978 bp = port_Board(port);
1979 chip = AURORA_CD180(port_No(port));
1981 save_flags(flags); cli();
1982 port->MSVR &= ~bp->RTS;
1983 sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1986 aurora_wait_CCR(bp->r[chip]);
1987 sbus_writeb(CCR_SSCH2, &bp->r[chip]->r[CD180_CCR]);
1988 aurora_wait_CCR(bp->r[chip]);
1990 sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1991 restore_flags(flags);
1993 printk("aurora_throttle: end\n");
1997 static void aurora_unthrottle(struct tty_struct * tty)
1999 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2000 struct Aurora_board *bp;
2001 unsigned long flags;
2005 printk("aurora_unthrottle: start\n");
2007 if ((aurora_paranoia_check(port, tty->name, "aurora_unthrottle"))
2010 bp = port_Board(port);
2012 chip = AURORA_CD180(port_No(port));
2014 save_flags(flags); cli();
2015 port->MSVR |= bp->RTS;
2016 sbus_writeb(port_No(port) & 7,
2017 &bp->r[chip]->r[CD180_CAR]);
2020 aurora_wait_CCR(bp->r[chip]);
2021 sbus_writeb(CCR_SSCH1,
2022 &bp->r[chip]->r[CD180_CCR]);
2023 aurora_wait_CCR(bp->r[chip]);
2025 sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
2026 restore_flags(flags);
2028 printk("aurora_unthrottle: end\n");
2032 static void aurora_stop(struct tty_struct * tty)
2034 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2035 struct Aurora_board *bp;
2036 unsigned long flags;
2040 printk("aurora_stop: start\n");
2042 if ((aurora_paranoia_check(port, tty->name, "aurora_stop"))
2045 bp = port_Board(port);
2047 chip = AURORA_CD180(port_No(port));
2049 save_flags(flags); cli();
2050 port->SRER &= ~SRER_TXRDY;
2051 sbus_writeb(port_No(port) & 7,
2052 &bp->r[chip]->r[CD180_CAR]);
2054 sbus_writeb(port->SRER,
2055 &bp->r[chip]->r[CD180_SRER]);
2056 restore_flags(flags);
2058 printk("aurora_stop: end\n");
2062 static void aurora_start(struct tty_struct * tty)
2064 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2065 struct Aurora_board *bp;
2066 unsigned long flags;
2070 printk("aurora_start: start\n");
2072 if ((aurora_paranoia_check(port, tty->name, "aurora_start"))
2075 bp = port_Board(port);
2077 chip = AURORA_CD180(port_No(port));
2079 save_flags(flags); cli();
2080 if (port->xmit_cnt && port->xmit_buf && !(port->SRER & SRER_TXRDY)) {
2081 port->SRER |= SRER_TXRDY;
2082 sbus_writeb(port_No(port) & 7,
2083 &bp->r[chip]->r[CD180_CAR]);
2085 sbus_writeb(port->SRER,
2086 &bp->r[chip]->r[CD180_SRER]);
2088 restore_flags(flags);
2090 printk("aurora_start: end\n");
2095 * This routine is called from the scheduler tqueue when the interrupt
2096 * routine has signalled that a hangup has occurred. The path of
2097 * hangup processing is:
2099 * serial interrupt routine -> (scheduler tqueue) ->
2100 * do_aurora_hangup() -> tty->hangup() -> aurora_hangup()
2103 static void do_aurora_hangup(void *private_)
2105 struct Aurora_port *port = (struct Aurora_port *) private_;
2106 struct tty_struct *tty;
2109 printk("do_aurora_hangup: start\n");
2113 tty_hangup(tty); /* FIXME: module removal race - AKPM */
2115 printk("do_aurora_hangup: end\n");
2120 static void aurora_hangup(struct tty_struct * tty)
2122 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2123 struct Aurora_board *bp;
2126 printk("aurora_hangup: start\n");
2128 if ((aurora_paranoia_check(port, tty->name, "aurora_hangup"))
2131 bp = port_Board(port);
2133 aurora_shutdown_port(bp, port);
2136 port->flags &= ~ASYNC_NORMAL_ACTIVE;
2138 wake_up_interruptible(&port->open_wait);
2140 printk("aurora_hangup: end\n");
2144 static void aurora_set_termios(struct tty_struct * tty, struct termios * old_termios)
2146 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2147 unsigned long flags;
2150 printk("aurora_set_termios: start\n");
2152 if ((aurora_paranoia_check(port, tty->name, "aurora_set_termios"))
2155 if (tty->termios->c_cflag == old_termios->c_cflag &&
2156 tty->termios->c_iflag == old_termios->c_iflag)
2159 save_flags(flags); cli();
2160 aurora_change_speed(port_Board(port), port);
2161 restore_flags(flags);
2163 if ((old_termios->c_cflag & CRTSCTS) &&
2164 !(tty->termios->c_cflag & CRTSCTS)) {
2165 tty->hw_stopped = 0;
2169 printk("aurora_set_termios: end\n");
2173 static void do_aurora_bh(void)
2175 run_task_queue(&tq_aurora);
2178 static void do_softint(void *private_)
2180 struct Aurora_port *port = (struct Aurora_port *) private_;
2181 struct tty_struct *tty;
2184 printk("do_softint: start\n");
2190 if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) {
2194 printk("do_softint: end\n");
2198 static struct tty_operations aurora_ops = {
2199 .open = aurora_open,
2200 .close = aurora_close,
2201 .write = aurora_write,
2202 .put_char = aurora_put_char,
2203 .flush_chars = aurora_flush_chars,
2204 .write_room = aurora_write_room,
2205 .chars_in_buffer = aurora_chars_in_buffer,
2206 .flush_buffer = aurora_flush_buffer,
2207 .ioctl = aurora_ioctl,
2208 .throttle = aurora_throttle,
2209 .unthrottle = aurora_unthrottle,
2210 .set_termios = aurora_set_termios,
2211 .stop = aurora_stop,
2212 .start = aurora_start,
2213 .hangup = aurora_hangup,
2214 .tiocmget = aurora_tiocmget,
2215 .tiocmset = aurora_tiocmset,
2218 static int aurora_init_drivers(void)
2224 printk("aurora_init_drivers: start\n");
2226 tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL);
2227 if (tmp_buf == NULL) {
2228 printk(KERN_ERR "aurora: Couldn't get free page.\n");
2231 init_bh(AURORA_BH, do_aurora_bh);
2232 aurora_driver = alloc_tty_driver(AURORA_INPORTS);
2233 if (!aurora_driver) {
2234 printk(KERN_ERR "aurora: Couldn't allocate tty driver.\n");
2235 free_page((unsigned long) tmp_buf);
2238 aurora_driver->owner = THIS_MODULE;
2239 aurora_driver->name = "ttyA";
2240 aurora_driver->major = AURORA_MAJOR;
2241 aurora_driver->type = TTY_DRIVER_TYPE_SERIAL;
2242 aurora_driver->subtype = SERIAL_TYPE_NORMAL;
2243 aurora_driver->init_termios = tty_std_termios;
2244 aurora_driver->init_termios.c_cflag =
2245 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2246 aurora_driver->flags = TTY_DRIVER_REAL_RAW;
2247 tty_set_operations(aurora_driver, &aurora_ops);
2248 error = tty_register_driver(aurora_driver);
2250 put_tty_driver(aurora_driver);
2251 free_page((unsigned long) tmp_buf);
2252 printk(KERN_ERR "aurora: Couldn't register aurora driver, error = %d\n",
2257 memset(aurora_port, 0, sizeof(aurora_port));
2258 for (i = 0; i < AURORA_TNPORTS; i++) {
2259 aurora_port[i].magic = AURORA_MAGIC;
2260 aurora_port[i].tqueue.routine = do_softint;
2261 aurora_port[i].tqueue.data = &aurora_port[i];
2262 aurora_port[i].tqueue_hangup.routine = do_aurora_hangup;
2263 aurora_port[i].tqueue_hangup.data = &aurora_port[i];
2264 aurora_port[i].close_delay = 50 * HZ/100;
2265 aurora_port[i].closing_wait = 3000 * HZ/100;
2266 init_waitqueue_head(&aurora_port[i].open_wait);
2267 init_waitqueue_head(&aurora_port[i].close_wait);
2270 printk("aurora_init_drivers: end\n");
2275 static void aurora_release_drivers(void)
2278 printk("aurora_release_drivers: start\n");
2280 free_page((unsigned long)tmp_buf);
2281 tty_unregister_driver(aurora_driver);
2282 put_tty_driver(aurora_driver);
2284 printk("aurora_release_drivers: end\n");
2289 * Called at boot time.
2291 * You can specify IO base for up to RC_NBOARD cards,
2292 * using line "riscom8=0xiobase1,0xiobase2,.." at LILO prompt.
2293 * Note that there will be no probing at default
2294 * addresses in this case.
2297 void __init aurora_setup(char *str, int *ints)
2301 for(i=0;(i<ints[0])&&(i<4);i++) {
2302 if (ints[i+1]) irqs[i]=ints[i+1];
2306 static int __init aurora_real_init(void)
2311 printk(KERN_INFO "aurora: Driver starting.\n");
2312 if(aurora_init_drivers())
2314 found = aurora_probe();
2316 aurora_release_drivers();
2317 printk(KERN_INFO "aurora: No Aurora Multiport boards detected.\n");
2320 printk(KERN_INFO "aurora: %d boards found.\n", found);
2322 for (i = 0; i < found; i++) {
2323 int ret = aurora_setup_board(&aurora_board[i]);
2327 printk(KERN_ERR "aurora_init: error aurora_setup_board ret %d\n",
2340 module_param(irq , int, 0);
2341 module_param(irq1, int, 0);
2342 module_param(irq2, int, 0);
2343 module_param(irq3, int, 0);
2345 static int __init aurora_init(void)
2347 if (irq ) irqs[0]=irq ;
2348 if (irq1) irqs[1]=irq1;
2349 if (irq2) irqs[2]=irq2;
2350 if (irq3) irqs[3]=irq3;
2351 return aurora_real_init();
2354 static void __exit aurora_cleanup(void)
2359 printk("cleanup_module: aurora_release_drivers\n");
2362 aurora_release_drivers();
2363 for (i = 0; i < AURORA_NBOARD; i++)
2364 if (aurora_board[i].flags & AURORA_BOARD_PRESENT) {
2365 aurora_shutdown_board(&aurora_board[i]);
2366 aurora_release_io_range(&aurora_board[i]);
2370 module_init(aurora_init);
2371 module_exit(aurora_cleanup);
2372 MODULE_LICENSE("GPL");