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   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
   3  *
   4  *      Copyright (c) 1999 by Oliver Aldulea (oli at bv dot ro)
   5  *
   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.
  13  *
  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.
  18  *
  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.
  23  *
  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.
  27  *
  28  *      Revision 1.0
  29  *
  30  *      This is the first public release.
  31  *
  32  *      Most of the information you need is in the aurora.h file. Please
  33  *      read that file before reading this one.
  34  *
  35  *      Several parts of the code do not have comments yet.
  36  *
  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.
  41  *
  42  * Fixed to use tty_get_baud_rate().
  43  *   Theodore Ts'o <tytso@mit.edu>, 2001-Oct-12
  44  */
  45
  46 #include <linux/module.h>
  47
  48 #include <linux/errno.h>
  49 #include <linux/sched.h>
  50 #ifdef AURORA_INT_DEBUG
  51 #include <linux/timer.h>
  52 #endif
  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>
  59 #include <linux/mm.h>
  60 #include <linux/kernel.h>
  61 #include <linux/init.h>
  62 #include <linux/delay.h>
  63 #include <linux/bitops.h>
  64
  65 #include <asm/io.h>
  66 #include <asm/irq.h>
  67 #include <asm/oplib.h>
  68 #include <asm/system.h>
  69 #include <asm/kdebug.h>
  70 #include <asm/sbus.h>
  71 #include <asm/uaccess.h>
  72
  73 #include "aurora.h"
  74 #include "cd180.h"
  75
  76 unsigned char irqs[4] = {
  77         0, 0, 0, 0
  78 };
  79
  80 #ifdef AURORA_INT_DEBUG
  81 int irqhit=0;
  82 #endif
  83
  84 static struct tty_driver *aurora_driver;
  85 static struct Aurora_board aurora_board[AURORA_NBOARD] = {
  86         {0,},
  87 };
  88
  89 static struct Aurora_port aurora_port[AURORA_TNPORTS] =  {
  90         { 0, },
  91 };
  92
  93 /* no longer used. static struct Aurora_board * IRQ_to_board[16] = { NULL, } ;*/
  94 static unsigned char * tmp_buf = NULL;
  95
  96 DECLARE_TASK_QUEUE(tq_aurora);
  97
  98 static inline int aurora_paranoia_check(struct Aurora_port const * port,
  99                                     char *name, const char *routine)
 100 {
 101 #ifdef AURORA_PARANOIA_CHECK
 102         static const char *badmagic =
 103                 KERN_DEBUG "aurora: Warning: bad aurora port magic number for device %s in %s\n";
 104         static const char *badinfo =
 105                 KERN_DEBUG "aurora: Warning: null aurora port for device %s in %s\n";
 106
 107         if (!port) {
 108                 printk(badinfo, name, routine);
 109                 return 1;
 110         }
 111         if (port->magic != AURORA_MAGIC) {
 112                 printk(badmagic, name, routine);
 113                 return 1;
 114         }
 115 #endif
 116         return 0;
 117 }
 118
 119 /*
 120  *
 121  *  Service functions for aurora driver.
 122  *
 123  */
 124
 125 /* Get board number from pointer */
 126 static inline int board_No (struct Aurora_board const * bp)
 127 {
 128         return bp - aurora_board;
 129 }
 130
 131 /* Get port number from pointer */
 132 static inline int port_No (struct Aurora_port const * port)
 133 {
 134         return AURORA_PORT(port - aurora_port);
 135 }
 136
 137 /* Get pointer to board from pointer to port */
 138 static inline struct Aurora_board * port_Board(struct Aurora_port const * port)
 139 {
 140         return &aurora_board[AURORA_BOARD(port - aurora_port)];
 141 }
 142
 143 /* Wait for Channel Command Register ready */
 144 static inline void aurora_wait_CCR(struct aurora_reg128 * r)
 145 {
 146         unsigned long delay;
 147
 148 #ifdef AURORA_DEBUG
 149 printk("aurora_wait_CCR\n");
 150 #endif
 151         /* FIXME: need something more descriptive than 100000 :) */
 152         for (delay = 100000; delay; delay--)
 153                 if (!sbus_readb(&r->r[CD180_CCR]))
 154                         return;
 155         printk(KERN_DEBUG "aurora: Timeout waiting for CCR.\n");
 156 }
 157
 158 /*
 159  *  aurora probe functions.
 160  */
 161
 162 /* Must be called with enabled interrupts */
 163 static inline void aurora_long_delay(unsigned long delay)
 164 {
 165         unsigned long i;
 166
 167 #ifdef AURORA_DEBUG
 168         printk("aurora_long_delay: start\n");
 169 #endif
 170         for (i = jiffies + delay; time_before(jiffies, i); ) ;
 171 #ifdef AURORA_DEBUG
 172         printk("aurora_long_delay: end\n");
 173 #endif
 174 }
 175
 176 /* Reset and setup CD180 chip */
 177 static int aurora_init_CD180(struct Aurora_board * bp, int chip)
 178 {
 179         unsigned long flags;
 180         int id;
 181
 182 #ifdef AURORA_DEBUG
 183         printk("aurora_init_CD180: start %d:%d\n",
 184                board_No(bp), chip);
 185 #endif
 186         save_flags(flags); cli();
 187         sbus_writeb(0, &bp->r[chip]->r[CD180_CAR]);
 188         sbus_writeb(0, &bp->r[chip]->r[CD180_GSVR]);
 189
 190         /* Wait for CCR ready        */
 191         aurora_wait_CCR(bp->r[chip]);
 192
 193         /* Reset CD180 chip          */
 194         sbus_writeb(CCR_HARDRESET, &bp->r[chip]->r[CD180_CCR]);
 195         udelay(1);
 196         sti();
 197         id=1000;
 198         while((--id) &&
 199               (sbus_readb(&bp->r[chip]->r[CD180_GSVR])!=0xff))udelay(100);
 200         if(!id) {
 201                 printk(KERN_ERR "aurora%d: Chip %d failed init.\n",
 202                        board_No(bp), chip);
 203                 restore_flags(flags);
 204                 return(-1);
 205         }
 206         cli();
 207         sbus_writeb((board_No(bp)<<5)|((chip+1)<<3),
 208                     &bp->r[chip]->r[CD180_GSVR]); /* Set ID for this chip      */
 209         sbus_writeb(0x80|bp->ACK_MINT,
 210                     &bp->r[chip]->r[CD180_MSMR]); /* Prio for modem intr       */
 211         sbus_writeb(0x80|bp->ACK_TINT,
 212                     &bp->r[chip]->r[CD180_TSMR]); /* Prio for transmitter intr */
 213         sbus_writeb(0x80|bp->ACK_RINT,
 214                     &bp->r[chip]->r[CD180_RSMR]); /* Prio for receiver intr    */
 215         /* Setting up prescaler. We need 4 tick per 1 ms */
 216         sbus_writeb((bp->oscfreq/(1000000/AURORA_TPS)) >> 8,
 217                     &bp->r[chip]->r[CD180_PPRH]);
 218         sbus_writeb((bp->oscfreq/(1000000/AURORA_TPS)) & 0xff,
 219                     &bp->r[chip]->r[CD180_PPRL]);
 220
 221         sbus_writeb(SRCR_AUTOPRI|SRCR_GLOBPRI,
 222                     &bp->r[chip]->r[CD180_SRCR]);
 223
 224         id = sbus_readb(&bp->r[chip]->r[CD180_GFRCR]);
 225         printk(KERN_INFO "aurora%d: Chip %d id %02x: ",
 226                board_No(bp), chip,id);
 227         if(sbus_readb(&bp->r[chip]->r[CD180_SRCR]) & 128) {
 228                 switch (id) {
 229                         case 0x82:printk("CL-CD1864 rev A\n");break;
 230                         case 0x83:printk("CL-CD1865 rev A\n");break;
 231                         case 0x84:printk("CL-CD1865 rev B\n");break;
 232                         case 0x85:printk("CL-CD1865 rev C\n");break;
 233                         default:printk("Unknown.\n");
 234                 };
 235         } else {
 236                 switch (id) {
 237                         case 0x81:printk("CL-CD180 rev B\n");break;
 238                         case 0x82:printk("CL-CD180 rev C\n");break;
 239                         default:printk("Unknown.\n");
 240                 };
 241         }
 242         restore_flags(flags);
 243 #ifdef AURORA_DEBUG
 244         printk("aurora_init_CD180: end\n");
 245 #endif
 246         return 0;
 247 }
 248
 249 static int valid_irq(unsigned char irq)
 250 {
 251 int i;
 252 for(i=0;i<TYPE_1_IRQS;i++)
 253         if (type_1_irq[i]==irq) return 1;
 254 return 0;
 255 }
 256
 257 static irqreturn_t aurora_interrupt(int irq, void * dev_id, struct pt_regs * regs);
 258
 259 /* Main probing routine, also sets irq. */
 260 static int aurora_probe(void)
 261 {
 262         struct sbus_bus *sbus;
 263         struct sbus_dev *sdev;
 264         int grrr;
 265         char buf[30];
 266         int bn = 0;
 267         struct Aurora_board *bp;
 268
 269         for_each_sbus(sbus) {
 270                 for_each_sbusdev(sdev, sbus) {
 271 /*                      printk("Try: %x %s\n",sdev,sdev->prom_name);*/
 272                         if (!strcmp(sdev->prom_name, "sio16")) {
 273 #ifdef AURORA_DEBUG
 274                                 printk(KERN_INFO "aurora: sio16 at %p\n",sdev);
 275 #endif
 276                                 if((sdev->reg_addrs[0].reg_size!=1) &&
 277                                    (sdev->reg_addrs[1].reg_size!=128) &&
 278                                    (sdev->reg_addrs[2].reg_size!=128) &&
 279                                    (sdev->reg_addrs[3].reg_size!=4)) {
 280                                         printk(KERN_ERR "aurora%d: registers' sizes "
 281                                                "do not match.\n", bn);
 282                                         break;
 283                                 }
 284                                 bp = &aurora_board[bn];
 285                                 bp->r0 = (struct aurora_reg1 *)
 286                                         sbus_ioremap(&sdev->resource[0], 0,
 287                                                      sdev->reg_addrs[0].reg_size,
 288                                                      "sio16");
 289                                 if (bp->r0 == NULL) {
 290                                         printk(KERN_ERR "aurora%d: can't map "
 291                                                "reg_addrs[0]\n", bn);
 292                                         break;
 293                                 }
 294 #ifdef AURORA_DEBUG
 295                                 printk("Map reg 0: %p\n", bp->r0);
 296 #endif
 297                                 bp->r[0] = (struct aurora_reg128 *)
 298                                         sbus_ioremap(&sdev->resource[1], 0,
 299                                                      sdev->reg_addrs[1].reg_size,
 300                                                      "sio16");
 301                                 if (bp->r[0] == NULL) {
 302                                         printk(KERN_ERR "aurora%d: can't map "
 303                                                "reg_addrs[1]\n", bn);
 304                                         break;
 305                                 }
 306 #ifdef AURORA_DEBUG
 307                                 printk("Map reg 1: %p\n", bp->r[0]);
 308 #endif
 309                                 bp->r[1] = (struct aurora_reg128 *)
 310                                         sbus_ioremap(&sdev->resource[2], 0,
 311                                                      sdev->reg_addrs[2].reg_size,
 312                                                      "sio16");
 313                                 if (bp->r[1] == NULL) {
 314                                         printk(KERN_ERR "aurora%d: can't map "
 315                                                "reg_addrs[2]\n", bn);
 316                                         break;
 317                                 }
 318 #ifdef AURORA_DEBUG
 319                                 printk("Map reg 2: %p\n", bp->r[1]);
 320 #endif
 321                                 bp->r3 = (struct aurora_reg4 *)
 322                                         sbus_ioremap(&sdev->resource[3], 0,
 323                                                      sdev->reg_addrs[3].reg_size,
 324                                                      "sio16");
 325                                 if (bp->r3 == NULL) {
 326                                         printk(KERN_ERR "aurora%d: can't map "
 327                                                "reg_addrs[3]\n", bn);
 328                                         break;
 329                                 }
 330 #ifdef AURORA_DEBUG
 331                                 printk("Map reg 3: %p\n", bp->r3);
 332 #endif
 333                                 /* Variables setup */
 334                                 bp->flags = 0;
 335 #ifdef AURORA_DEBUG
 336                                 grrr=prom_getint(sdev->prom_node,"intr");
 337                                 printk("intr pri %d\n", grrr);
 338 #endif
 339                                 if ((bp->irq=irqs[bn]) && valid_irq(bp->irq) &&
 340                                     !request_irq(bp->irq|0x30, aurora_interrupt, IRQF_SHARED, "sio16", bp)) {
 341                                         free_irq(bp->irq|0x30, bp);
 342                                 } else
 343                                 if ((bp->irq=prom_getint(sdev->prom_node, "bintr")) && valid_irq(bp->irq) &&
 344                                     !request_irq(bp->irq|0x30, aurora_interrupt, IRQF_SHARED, "sio16", bp)) {
 345                                         free_irq(bp->irq|0x30, bp);
 346                                 } else
 347                                 if ((bp->irq=prom_getint(sdev->prom_node, "intr")) && valid_irq(bp->irq) &&
 348                                     !request_irq(bp->irq|0x30, aurora_interrupt, IRQF_SHARED, "sio16", bp)) {
 349                                         free_irq(bp->irq|0x30, bp);
 350                                 } else
 351                                 for(grrr=0;grrr<TYPE_1_IRQS;grrr++) {
 352                                         if ((bp->irq=type_1_irq[grrr])&&!request_irq(bp->irq|0x30, aurora_interrupt, IRQF_SHARED, "sio16", bp)) {
 353                                                 free_irq(bp->irq|0x30, bp);
 354                                                 break;
 355                                         } else {
 356                                         printk(KERN_ERR "aurora%d: Could not get an irq for this board !!!\n",bn);
 357                                         bp->flags=0xff;
 358                                         }
 359                                 }
 360                                 if(bp->flags==0xff)break;
 361                                 printk(KERN_INFO "aurora%d: irq %d\n",bn,bp->irq&0x0f);
 362                                 buf[0]=0;
 363                                 grrr=prom_getproperty(sdev->prom_node,"dtr_rts",buf,sizeof(buf));
 364                                 if(!strcmp(buf,"swapped")){
 365                                         printk(KERN_INFO "aurora%d: Swapped DTR and RTS\n",bn);
 366                                         bp->DTR=MSVR_RTS;
 367                                         bp->RTS=MSVR_DTR;
 368                                         bp->MSVDTR=CD180_MSVRTS;
 369                                         bp->MSVRTS=CD180_MSVDTR;
 370                                         bp->flags|=AURORA_BOARD_DTR_FLOW_OK;
 371                                         }else{
 372                                         #ifdef AURORA_FORCE_DTR_FLOW
 373                                         printk(KERN_INFO "aurora%d: Forcing swapped DTR-RTS\n",bn);
 374                                         bp->DTR=MSVR_RTS;
 375                                         bp->RTS=MSVR_DTR;
 376                                         bp->MSVDTR=CD180_MSVRTS;
 377                                         bp->MSVRTS=CD180_MSVDTR;
 378                                         bp->flags|=AURORA_BOARD_DTR_FLOW_OK;
 379                                         #else
 380                                         printk(KERN_INFO "aurora%d: Normal DTR and RTS\n",bn);
 381                                         bp->DTR=MSVR_DTR;
 382                                         bp->RTS=MSVR_RTS;
 383                                         bp->MSVDTR=CD180_MSVDTR;
 384                                         bp->MSVRTS=CD180_MSVRTS;
 385                                         #endif
 386                                 }
 387                                 bp->oscfreq=prom_getint(sdev->prom_node,"clk")*100;
 388                                 printk(KERN_INFO "aurora%d: Oscillator: %d Hz\n",bn,bp->oscfreq);
 389                                 grrr=prom_getproperty(sdev->prom_node,"chip",buf,sizeof(buf));
 390                                 printk(KERN_INFO "aurora%d: Chips: %s\n",bn,buf);
 391                                 grrr=prom_getproperty(sdev->prom_node,"manu",buf,sizeof(buf));
 392                                 printk(KERN_INFO "aurora%d: Manufacturer: %s\n",bn,buf);
 393                                 grrr=prom_getproperty(sdev->prom_node,"model",buf,sizeof(buf));
 394                                 printk(KERN_INFO "aurora%d: Model: %s\n",bn,buf);
 395                                 grrr=prom_getproperty(sdev->prom_node,"rev",buf,sizeof(buf));
 396                                 printk(KERN_INFO "aurora%d: Revision: %s\n",bn,buf);
 397                                 grrr=prom_getproperty(sdev->prom_node,"mode",buf,sizeof(buf));
 398                                 printk(KERN_INFO "aurora%d: Mode: %s\n",bn,buf);
 399                                 #ifdef MODULE
 400                                 bp->count=0;
 401                                 #endif
 402                                 bp->flags = AURORA_BOARD_PRESENT;
 403                                 /* hardware ack */
 404                                 bp->ACK_MINT=1;
 405                                 bp->ACK_TINT=2;
 406                                 bp->ACK_RINT=3;
 407                                 bn++;
 408                         }
 409                 }
 410         }
 411         return bn;
 412 }
 413
 414 static void aurora_release_io_range(struct Aurora_board *bp)
 415 {
 416         sbus_iounmap((unsigned long)bp->r0, 1);
 417         sbus_iounmap((unsigned long)bp->r[0], 128);
 418         sbus_iounmap((unsigned long)bp->r[1], 128);
 419         sbus_iounmap((unsigned long)bp->r3, 4);
 420 }
 421
 422 static inline void aurora_mark_event(struct Aurora_port * port, int event)
 423 {
 424 #ifdef AURORA_DEBUG
 425         printk("aurora_mark_event: start\n");
 426 #endif
 427         set_bit(event, &port->event);
 428         queue_task(&port->tqueue, &tq_aurora);
 429         mark_bh(AURORA_BH);
 430 #ifdef AURORA_DEBUG
 431         printk("aurora_mark_event: end\n");
 432 #endif
 433 }
 434
 435 static __inline__ struct Aurora_port * aurora_get_port(struct Aurora_board const * bp,
 436                                                        int chip,
 437                                                        unsigned char const *what)
 438 {
 439         unsigned char channel;
 440         struct Aurora_port * port;
 441
 442         channel = ((chip << 3) |
 443                    ((sbus_readb(&bp->r[chip]->r[CD180_GSCR]) & GSCR_CHAN) >> GSCR_CHAN_OFF));
 444         port = &aurora_port[board_No(bp) * AURORA_NPORT * AURORA_NCD180 + channel];
 445         if (port->flags & ASYNC_INITIALIZED)
 446                 return port;
 447
 448         printk(KERN_DEBUG "aurora%d: %s interrupt from invalid port %d\n",
 449                board_No(bp), what, channel);
 450         return NULL;
 451 }
 452
 453 static void aurora_receive_exc(struct Aurora_board const * bp, int chip)
 454 {
 455         struct Aurora_port *port;
 456         struct tty_struct *tty;
 457         unsigned char status;
 458         unsigned char ch;
 459
 460         if (!(port = aurora_get_port(bp, chip, "Receive_x")))
 461                 return;
 462
 463         tty = port->tty;
 464         if (tty->flip.count >= TTY_FLIPBUF_SIZE)  {
 465 #ifdef AURORA_INTNORM
 466                 printk("aurora%d: port %d: Working around flip buffer overflow.\n",
 467                        board_No(bp), port_No(port));
 468 #endif
 469                 return;
 470         }
 471
 472 #ifdef AURORA_REPORT_OVERRUN
 473         status = sbus_readb(&bp->r[chip]->r[CD180_RCSR]);
 474         if (status & RCSR_OE)  {
 475                 port->overrun++;
 476 #if 1
 477                 printk("aurora%d: port %d: Overrun. Total %ld overruns.\n",
 478                        board_No(bp), port_No(port), port->overrun);
 479 #endif
 480         }
 481         status &= port->mark_mask;
 482 #else
 483         status = sbus_readb(&bp->r[chip]->r[CD180_RCSR]) & port->mark_mask;
 484 #endif
 485         ch = sbus_readb(&bp->r[chip]->r[CD180_RDR]);
 486         if (!status)
 487                 return;
 488
 489         if (status & RCSR_TOUT)  {
 490 /*              printk("aurora%d: port %d: Receiver timeout. Hardware problems ?\n",
 491                        board_No(bp), port_No(port));*/
 492                 return;
 493
 494         } else if (status & RCSR_BREAK)  {
 495                 printk(KERN_DEBUG "aurora%d: port %d: Handling break...\n",
 496                        board_No(bp), port_No(port));
 497                 *tty->flip.flag_buf_ptr++ = TTY_BREAK;
 498                 if (port->flags & ASYNC_SAK)
 499                         do_SAK(tty);
 500
 501         } else if (status & RCSR_PE)
 502                 *tty->flip.flag_buf_ptr++ = TTY_PARITY;
 503
 504         else if (status & RCSR_FE)
 505                 *tty->flip.flag_buf_ptr++ = TTY_FRAME;
 506
 507         else if (status & RCSR_OE)
 508                 *tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
 509
 510         else
 511                 *tty->flip.flag_buf_ptr++ = 0;
 512
 513         *tty->flip.char_buf_ptr++ = ch;
 514         tty->flip.count++;
 515         queue_task(&tty->flip.tqueue, &tq_timer);
 516 }
 517
 518 static void aurora_receive(struct Aurora_board const * bp, int chip)
 519 {
 520         struct Aurora_port *port;
 521         struct tty_struct *tty;
 522         unsigned char count,cnt;
 523
 524         if (!(port = aurora_get_port(bp, chip, "Receive")))
 525                 return;
 526
 527         tty = port->tty;
 528
 529         count = sbus_readb(&bp->r[chip]->r[CD180_RDCR]);
 530
 531 #ifdef AURORA_REPORT_FIFO
 532         port->hits[count > 8 ? 9 : count]++;
 533 #endif
 534
 535         while (count--)  {
 536                 if (tty->flip.count >= TTY_FLIPBUF_SIZE)  {
 537 #ifdef AURORA_INTNORM
 538                         printk("aurora%d: port %d: Working around flip buffer overflow.\n",
 539                                board_No(bp), port_No(port));
 540 #endif
 541                         break;
 542                 }
 543                 cnt = sbus_readb(&bp->r[chip]->r[CD180_RDR]);
 544                 *tty->flip.char_buf_ptr++ = cnt;
 545                 *tty->flip.flag_buf_ptr++ = 0;
 546                 tty->flip.count++;
 547         }
 548         queue_task(&tty->flip.tqueue, &tq_timer);
 549 }
 550
 551 static void aurora_transmit(struct Aurora_board const * bp, int chip)
 552 {
 553         struct Aurora_port *port;
 554         struct tty_struct *tty;
 555         unsigned char count;
 556
 557         if (!(port = aurora_get_port(bp, chip, "Transmit")))
 558                 return;
 559
 560         tty = port->tty;
 561
 562         if (port->SRER & SRER_TXEMPTY)  {
 563                 /* FIFO drained */
 564                 sbus_writeb(port_No(port) & 7,
 565                             &bp->r[chip]->r[CD180_CAR]);
 566                 udelay(1);
 567                 port->SRER &= ~SRER_TXEMPTY;
 568                 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
 569                 return;
 570         }
 571
 572         if ((port->xmit_cnt <= 0 && !port->break_length)
 573             || tty->stopped || tty->hw_stopped)  {
 574                 sbus_writeb(port_No(port) & 7,
 575                             &bp->r[chip]->r[CD180_CAR]);
 576                 udelay(1);
 577                 port->SRER &= ~SRER_TXRDY;
 578                 sbus_writeb(port->SRER,
 579                             &bp->r[chip]->r[CD180_SRER]);
 580                 return;
 581         }
 582
 583         if (port->break_length)  {
 584                 if (port->break_length > 0)  {
 585                         if (port->COR2 & COR2_ETC)  {
 586                                 sbus_writeb(CD180_C_ESC,
 587                                             &bp->r[chip]->r[CD180_TDR]);
 588                                 sbus_writeb(CD180_C_SBRK,
 589                                             &bp->r[chip]->r[CD180_TDR]);
 590                                 port->COR2 &= ~COR2_ETC;
 591                         }
 592                         count = min(port->break_length, 0xff);
 593                         sbus_writeb(CD180_C_ESC,
 594                                     &bp->r[chip]->r[CD180_TDR]);
 595                         sbus_writeb(CD180_C_DELAY,
 596                                     &bp->r[chip]->r[CD180_TDR]);
 597                         sbus_writeb(count,
 598                                     &bp->r[chip]->r[CD180_TDR]);
 599                         if (!(port->break_length -= count))
 600                                 port->break_length--;
 601                 } else  {
 602                         sbus_writeb(CD180_C_ESC,
 603                                     &bp->r[chip]->r[CD180_TDR]);
 604                         sbus_writeb(CD180_C_EBRK,
 605                                     &bp->r[chip]->r[CD180_TDR]);
 606                         sbus_writeb(port->COR2,
 607                                     &bp->r[chip]->r[CD180_COR2]);
 608                         aurora_wait_CCR(bp->r[chip]);
 609                         sbus_writeb(CCR_CORCHG2,
 610                                     &bp->r[chip]->r[CD180_CCR]);
 611                         port->break_length = 0;
 612                 }
 613                 return;
 614         }
 615
 616         count = CD180_NFIFO;
 617         do {
 618                 u8 byte = port->xmit_buf[port->xmit_tail++];
 619
 620                 sbus_writeb(byte, &bp->r[chip]->r[CD180_TDR]);
 621                 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1);
 622                 if (--port->xmit_cnt <= 0)
 623                         break;
 624         } while (--count > 0);
 625
 626         if (port->xmit_cnt <= 0)  {
 627                 sbus_writeb(port_No(port) & 7,
 628                             &bp->r[chip]->r[CD180_CAR]);
 629                 udelay(1);
 630                 port->SRER &= ~SRER_TXRDY;
 631                 sbus_writeb(port->SRER,
 632                             &bp->r[chip]->r[CD180_SRER]);
 633         }
 634         if (port->xmit_cnt <= port->wakeup_chars)
 635                 aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
 636 }
 637
 638 static void aurora_check_modem(struct Aurora_board const * bp, int chip)
 639 {
 640         struct Aurora_port *port;
 641         struct tty_struct *tty;
 642         unsigned char mcr;
 643
 644         if (!(port = aurora_get_port(bp, chip, "Modem")))
 645                 return;
 646
 647         tty = port->tty;
 648
 649         mcr = sbus_readb(&bp->r[chip]->r[CD180_MCR]);
 650         if (mcr & MCR_CDCHG)  {
 651                 if (sbus_readb(&bp->r[chip]->r[CD180_MSVR]) & MSVR_CD)
 652                         wake_up_interruptible(&port->open_wait);
 653                 else
 654                         schedule_task(&port->tqueue_hangup);
 655         }
 656
 657 /* 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
 658  * Aurora didn't made any boards with CTS or DSR broken...
 659  */
 660 /* #ifdef AURORA_BRAIN_DAMAGED_CTS
 661         if (mcr & MCR_CTSCHG)  {
 662                 if (aurora_in(bp, CD180_MSVR) & MSVR_CTS)  {
 663                         tty->hw_stopped = 0;
 664                         port->SRER |= SRER_TXRDY;
 665                         if (port->xmit_cnt <= port->wakeup_chars)
 666                                 aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
 667                 } else  {
 668                         tty->hw_stopped = 1;
 669                         port->SRER &= ~SRER_TXRDY;
 670                 }
 671                 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
 672         }
 673         if (mcr & MCR_DSRCHG)  {
 674                 if (aurora_in(bp, CD180_MSVR) & MSVR_DSR)  {
 675                         tty->hw_stopped = 0;
 676                         port->SRER |= SRER_TXRDY;
 677                         if (port->xmit_cnt <= port->wakeup_chars)
 678                                 aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
 679                 } else  {
 680                         tty->hw_stopped = 1;
 681                         port->SRER &= ~SRER_TXRDY;
 682                 }
 683                 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
 684         }
 685 #endif AURORA_BRAIN_DAMAGED_CTS */
 686
 687         /* Clear change bits */
 688         sbus_writeb(0, &bp->r[chip]->r[CD180_MCR]);
 689 }
 690
 691 /* The main interrupt processing routine */
 692 static irqreturn_t aurora_interrupt(int irq, void * dev_id, struct pt_regs * regs)
 693 {
 694         unsigned char status;
 695         unsigned char ack,chip/*,chip_id*/;
 696         struct Aurora_board * bp = (struct Aurora_board *) dev_id;
 697         unsigned long loop = 0;
 698
 699 #ifdef AURORA_INT_DEBUG
 700         printk("IRQ%d %d\n",irq,++irqhit);
 701 #ifdef AURORA_FLOODPRO
 702         if (irqhit>=AURORA_FLOODPRO)
 703                 sbus_writeb(8, &bp->r0->r);
 704 #endif
 705 #endif
 706
 707 /* old  bp = IRQ_to_board[irq&0x0f];*/
 708
 709         if (!bp || !(bp->flags & AURORA_BOARD_ACTIVE))
 710                 return IRQ_NONE;
 711
 712 /*      The while() below takes care of this.
 713         status = sbus_readb(&bp->r[0]->r[CD180_SRSR]);
 714 #ifdef AURORA_INT_DEBUG
 715         printk("mumu: %02x\n", status);
 716 #endif
 717         if (!(status&SRSR_ANYINT))
 718                 return IRQ_NONE; * Nobody has anything to say, so exit *
 719 */
 720         while ((loop++ < 48) &&
 721                (status = sbus_readb(&bp->r[0]->r[CD180_SRSR]) & SRSR_ANYINT)){
 722 #ifdef AURORA_INT_DEBUG
 723                 printk("SRSR: %02x\n", status);
 724 #endif
 725                 if (status & SRSR_REXT) {
 726                         ack = sbus_readb(&bp->r3->r[bp->ACK_RINT]);
 727 #ifdef AURORA_INT_DEBUG
 728                         printk("R-ACK %02x\n", ack);
 729 #endif
 730                         if ((ack >> 5) == board_No(bp)) {
 731                                 if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
 732                                         if ((ack&GSVR_ITMASK)==GSVR_IT_RGD) {
 733                                                 aurora_receive(bp,chip);
 734                                                 sbus_writeb(0,
 735                                                          &bp->r[chip]->r[CD180_EOSRR]);
 736                                         } else if ((ack & GSVR_ITMASK) == GSVR_IT_REXC) {
 737                                                 aurora_receive_exc(bp,chip);
 738                                                 sbus_writeb(0,
 739                                                          &bp->r[chip]->r[CD180_EOSRR]);
 740                                         }
 741                                 }
 742                         }
 743                 } else if (status & SRSR_TEXT) {
 744                         ack = sbus_readb(&bp->r3->r[bp->ACK_TINT]);
 745 #ifdef AURORA_INT_DEBUG
 746                         printk("T-ACK %02x\n", ack);
 747 #endif
 748                         if ((ack >> 5) == board_No(bp)) {
 749                                 if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
 750                                         if ((ack&GSVR_ITMASK)==GSVR_IT_TX) {
 751                                                 aurora_transmit(bp,chip);
 752                                                 sbus_writeb(0,
 753                                                          &bp->r[chip]->r[CD180_EOSRR]);
 754                                         }
 755                                 }
 756                         }
 757                 } else if (status & SRSR_MEXT) {
 758                         ack = sbus_readb(&bp->r3->r[bp->ACK_MINT]);
 759 #ifdef AURORA_INT_DEBUG
 760                         printk("M-ACK %02x\n", ack);
 761 #endif
 762                         if ((ack >> 5) == board_No(bp)) {
 763                                 if ((chip = ((ack>>3)&3)-1) < AURORA_NCD180) {
 764                                         if ((ack&GSVR_ITMASK)==GSVR_IT_MDM) {
 765                                                 aurora_check_modem(bp,chip);
 766                                                 sbus_writeb(0,
 767                                                          &bp->r[chip]->r[CD180_EOSRR]);
 768                                         }
 769                                 }
 770                         }
 771                 }
 772         }
 773 /* I guess this faster code can be used with CD1865, using AUROPRI and GLOBPRI. */
 774 #if 0
 775         while ((loop++ < 48)&&(status=bp->r[0]->r[CD180_SRSR]&SRSR_ANYINT)){
 776 #ifdef AURORA_INT_DEBUG
 777                 printk("SRSR: %02x\n",status);
 778 #endif
 779                 ack = sbus_readb(&bp->r3->r[0]);
 780 #ifdef AURORA_INT_DEBUG
 781                 printk("ACK: %02x\n",ack);
 782 #endif
 783                 if ((ack>>5)==board_No(bp)) {
 784                         if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
 785                                 ack&=GSVR_ITMASK;
 786                                 if (ack==GSVR_IT_RGD) {
 787                                         aurora_receive(bp,chip);
 788                                         sbus_writeb(0,
 789                                                     &bp->r[chip]->r[CD180_EOSRR]);
 790                                 } else if (ack==GSVR_IT_REXC) {
 791                                         aurora_receive_exc(bp,chip);
 792                                         sbus_writeb(0,
 793                                                     &bp->r[chip]->r[CD180_EOSRR]);
 794                                 } else if (ack==GSVR_IT_TX) {
 795                                         aurora_transmit(bp,chip);
 796                                         sbus_writeb(0,
 797                                                     &bp->r[chip]->r[CD180_EOSRR]);
 798                                 } else if (ack==GSVR_IT_MDM) {
 799                                         aurora_check_modem(bp,chip);
 800                                         sbus_writeb(0,
 801                                                     &bp->r[chip]->r[CD180_EOSRR]);
 802                                 }
 803                         }
 804                 }
 805         }
 806 #endif
 807
 808 /* This is the old handling routine, used in riscom8 for only one CD180. I keep it here for reference. */
 809 #if 0
 810         for(chip=0;chip<AURORA_NCD180;chip++){
 811                 chip_id=(board_No(bp)<<5)|((chip+1)<<3);
 812                 loop=0;
 813                 while ((loop++ < 1) &&
 814                        ((status = sbus_readb(&bp->r[chip]->r[CD180_SRSR])) &
 815                         (SRSR_TEXT | SRSR_MEXT | SRSR_REXT))) {
 816
 817                         if (status & SRSR_REXT) {
 818                                 ack = sbus_readb(&bp->r3->r[bp->ACK_RINT]);
 819                                 if (ack == (chip_id | GSVR_IT_RGD)) {
 820 #ifdef AURORA_INTMSG
 821                                         printk("RX ACK\n");
 822 #endif
 823                                         aurora_receive(bp,chip);
 824                                 } else if (ack == (chip_id | GSVR_IT_REXC)) {
 825 #ifdef AURORA_INTMSG
 826                                         printk("RXC ACK\n");
 827 #endif
 828                                         aurora_receive_exc(bp,chip);
 829                                 } else {
 830 #ifdef AURORA_INTNORM
 831                                         printk("aurora%d-%d: Bad receive ack 0x%02x.\n",
 832                                                board_No(bp), chip, ack);
 833 #endif
 834                                 }
 835                         } else if (status & SRSR_TEXT) {
 836                                 ack = sbus_readb(&bp->r3->r[bp->ACK_TINT]);
 837                                 if (ack == (chip_id | GSVR_IT_TX)){
 838 #ifdef AURORA_INTMSG
 839                                         printk("TX ACK\n");
 840 #endif
 841                                         aurora_transmit(bp,chip);
 842                                 } else {
 843 #ifdef AURORA_INTNORM
 844                                         printk("aurora%d-%d: Bad transmit ack 0x%02x.\n",
 845                                                board_No(bp), chip, ack);
 846 #endif
 847                                 }
 848                         } else  if (status & SRSR_MEXT)  {
 849                                 ack = sbus_readb(&bp->r3->r[bp->ACK_MINT]);
 850                                 if (ack == (chip_id | GSVR_IT_MDM)){
 851 #ifdef AURORA_INTMSG
 852                                         printk("MDM ACK\n");
 853 #endif
 854                                         aurora_check_modem(bp,chip);
 855                                 } else {
 856 #ifdef AURORA_INTNORM
 857                                         printk("aurora%d-%d: Bad modem ack 0x%02x.\n",
 858                                                board_No(bp), chip, ack);
 859 #endif
 860                                 }
 861                         }
 862                         sbus_writeb(0, &bp->r[chip]->r[CD180_EOSRR]);
 863                 }
 864         }
 865 #endif
 866
 867         return IRQ_HANDLED;
 868 }
 869
 870 #ifdef AURORA_INT_DEBUG
 871 static void aurora_timer (unsigned long ignored);
 872
 873 static DEFINE_TIMER(aurora_poll_timer, aurora_timer, 0, 0);
 874
 875 static void
 876 aurora_timer (unsigned long ignored)
 877 {
 878         unsigned long flags;
 879         int i;
 880
 881         save_flags(flags); cli();
 882
 883         printk("SRSR: %02x,%02x - ",
 884                sbus_readb(&aurora_board[0].r[0]->r[CD180_SRSR]),
 885                sbus_readb(&aurora_board[0].r[1]->r[CD180_SRSR]));
 886         for (i = 0; i < 4; i++) {
 887                 udelay(1);
 888                 printk("%02x ",
 889                        sbus_readb(&aurora_board[0].r3->r[i]));
 890         }
 891         printk("\n");
 892
 893         aurora_poll_timer.expires = jiffies + 300;
 894         add_timer (&aurora_poll_timer);
 895
 896         restore_flags(flags);
 897 }
 898 #endif
 899
 900 /*
 901  *  Routines for open & close processing.
 902  */
 903
 904 /* Called with disabled interrupts */
 905 static int aurora_setup_board(struct Aurora_board * bp)
 906 {
 907         int error;
 908
 909 #ifdef AURORA_ALLIRQ
 910         int i;
 911         for (i = 0; i < AURORA_ALLIRQ; i++) {
 912                 error = request_irq(allirq[i]|0x30, aurora_interrupt, IRQF_SHARED,
 913                                     "sio16", bp);
 914                 if (error)
 915                         printk(KERN_ERR "IRQ%d request error %d\n",
 916                                allirq[i], error);
 917         }
 918 #else
 919         error = request_irq(bp->irq|0x30, aurora_interrupt, IRQF_SHARED,
 920                             "sio16", bp);
 921         if (error) {
 922                 printk(KERN_ERR "IRQ request error %d\n", error);
 923                 return error;
 924         }
 925 #endif
 926         /* Board reset */
 927         sbus_writeb(0, &bp->r0->r);
 928         udelay(1);
 929         if (bp->flags & AURORA_BOARD_TYPE_2) {
 930                 /* unknown yet */
 931         } else {
 932                 sbus_writeb((AURORA_CFG_ENABLE_IO | AURORA_CFG_ENABLE_IRQ |
 933                              (((bp->irq)&0x0f)>>2)),
 934                             &bp->r0->r);
 935         }
 936         udelay(10000);
 937
 938         if (aurora_init_CD180(bp,0))error=1;error=0;
 939         if (aurora_init_CD180(bp,1))error++;
 940         if (error == AURORA_NCD180) {
 941                 printk(KERN_ERR "Both chips failed initialisation.\n");
 942                 return -EIO;
 943         }
 944
 945 #ifdef AURORA_INT_DEBUG
 946         aurora_poll_timer.expires= jiffies + 1;
 947         add_timer(&aurora_poll_timer);
 948 #endif
 949 #ifdef AURORA_DEBUG
 950         printk("aurora_setup_board: end\n");
 951 #endif
 952         return 0;
 953 }
 954
 955 /* Called with disabled interrupts */
 956 static void aurora_shutdown_board(struct Aurora_board *bp)
 957 {
 958         int i;
 959
 960 #ifdef AURORA_DEBUG
 961         printk("aurora_shutdown_board: start\n");
 962 #endif
 963
 964 #ifdef AURORA_INT_DEBUG
 965         del_timer(&aurora_poll_timer);
 966 #endif
 967
 968 #ifdef AURORA_ALLIRQ
 969         for(i=0;i<AURORA_ALLIRQ;i++){
 970                 free_irq(allirq[i]|0x30, bp);
 971 /*              IRQ_to_board[allirq[i]&0xf] = NULL;*/
 972         }
 973 #else
 974         free_irq(bp->irq|0x30, bp);
 975 /*      IRQ_to_board[bp->irq&0xf] = NULL;*/
 976 #endif
 977         /* Drop all DTR's */
 978         for(i=0;i<16;i++){
 979                 sbus_writeb(i & 7, &bp->r[i>>3]->r[CD180_CAR]);
 980                 udelay(1);
 981                 sbus_writeb(0, &bp->r[i>>3]->r[CD180_MSVR]);
 982                 udelay(1);
 983         }
 984         /* Board shutdown */
 985         sbus_writeb(0, &bp->r0->r);
 986
 987 #ifdef AURORA_DEBUG
 988         printk("aurora_shutdown_board: end\n");
 989 #endif
 990 }
 991
 992 /* Setting up port characteristics.
 993  * Must be called with disabled interrupts
 994  */
 995 static void aurora_change_speed(struct Aurora_board *bp, struct Aurora_port *port)
 996 {
 997         struct tty_struct *tty;
 998         unsigned long baud;
 999         long tmp;
1000         unsigned char cor1 = 0, cor3 = 0;
1001         unsigned char mcor1 = 0, mcor2 = 0,chip;
1002
1003 #ifdef AURORA_DEBUG
1004         printk("aurora_change_speed: start\n");
1005 #endif
1006         if (!(tty = port->tty) || !tty->termios)
1007                 return;
1008
1009         chip = AURORA_CD180(port_No(port));
1010
1011         port->SRER  = 0;
1012         port->COR2 = 0;
1013         port->MSVR = MSVR_RTS|MSVR_DTR;
1014
1015         baud = tty_get_baud_rate(tty);
1016
1017         /* Select port on the board */
1018         sbus_writeb(port_No(port) & 7,
1019                     &bp->r[chip]->r[CD180_CAR]);
1020         udelay(1);
1021
1022         if (!baud)  {
1023                 /* Drop DTR & exit */
1024                 port->MSVR &= ~(bp->DTR|bp->RTS);
1025                 sbus_writeb(port->MSVR,
1026                             &bp->r[chip]->r[CD180_MSVR]);
1027                 return;
1028         } else  {
1029                 /* Set DTR on */
1030                 port->MSVR |= bp->DTR;
1031                 sbus_writeb(port->MSVR,
1032                             &bp->r[chip]->r[CD180_MSVR]);
1033         }
1034
1035         /* Now we must calculate some speed dependent things. */
1036
1037         /* Set baud rate for port. */
1038         tmp = (((bp->oscfreq + baud/2) / baud +
1039                 CD180_TPC/2) / CD180_TPC);
1040
1041 /*      tmp = (bp->oscfreq/7)/baud;
1042         if((tmp%10)>4)tmp=tmp/10+1;else tmp=tmp/10;*/
1043 /*      printk("Prescaler period: %d\n",tmp);*/
1044
1045         sbus_writeb((tmp >> 8) & 0xff,
1046                     &bp->r[chip]->r[CD180_RBPRH]);
1047         sbus_writeb((tmp >> 8) & 0xff,
1048                     &bp->r[chip]->r[CD180_TBPRH]);
1049         sbus_writeb(tmp & 0xff, &bp->r[chip]->r[CD180_RBPRL]);
1050         sbus_writeb(tmp & 0xff, &bp->r[chip]->r[CD180_TBPRL]);
1051
1052         baud = (baud + 5) / 10;   /* Estimated CPS */
1053
1054         /* Two timer ticks seems enough to wakeup something like SLIP driver */
1055         tmp = ((baud + HZ/2) / HZ) * 2 - CD180_NFIFO;
1056         port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ?
1057                                               SERIAL_XMIT_SIZE - 1 : tmp);
1058
1059         /* Receiver timeout will be transmission time for 1.5 chars */
1060         tmp = (AURORA_TPS + AURORA_TPS/2 + baud/2) / baud;
1061         tmp = (tmp > 0xff) ? 0xff : tmp;
1062         sbus_writeb(tmp, &bp->r[chip]->r[CD180_RTPR]);
1063
1064         switch (C_CSIZE(tty))  {
1065          case CS5:
1066                 cor1 |= COR1_5BITS;
1067                 break;
1068          case CS6:
1069                 cor1 |= COR1_6BITS;
1070                 break;
1071          case CS7:
1072                 cor1 |= COR1_7BITS;
1073                 break;
1074          case CS8:
1075                 cor1 |= COR1_8BITS;
1076                 break;
1077         }
1078
1079         if (C_CSTOPB(tty))
1080                 cor1 |= COR1_2SB;
1081
1082         cor1 |= COR1_IGNORE;
1083         if (C_PARENB(tty))  {
1084                 cor1 |= COR1_NORMPAR;
1085                 if (C_PARODD(tty))
1086                         cor1 |= COR1_ODDP;
1087                 if (I_INPCK(tty))
1088                         cor1 &= ~COR1_IGNORE;
1089         }
1090         /* Set marking of some errors */
1091         port->mark_mask = RCSR_OE | RCSR_TOUT;
1092         if (I_INPCK(tty))
1093                 port->mark_mask |= RCSR_FE | RCSR_PE;
1094         if (I_BRKINT(tty) || I_PARMRK(tty))
1095                 port->mark_mask |= RCSR_BREAK;
1096         if (I_IGNPAR(tty))
1097                 port->mark_mask &= ~(RCSR_FE | RCSR_PE);
1098         if (I_IGNBRK(tty))  {
1099                 port->mark_mask &= ~RCSR_BREAK;
1100                 if (I_IGNPAR(tty))
1101                         /* Real raw mode. Ignore all */
1102                         port->mark_mask &= ~RCSR_OE;
1103         }
1104         /* Enable Hardware Flow Control */
1105         if (C_CRTSCTS(tty))  {
1106 /*#ifdef AURORA_BRAIN_DAMAGED_CTS
1107                 port->SRER |= SRER_DSR | SRER_CTS;
1108                 mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD;
1109                 mcor2 |= MCOR2_DSROD | MCOR2_CTSOD;
1110                 tty->hw_stopped = !(aurora_in(bp, CD180_MSVR) & (MSVR_CTS|MSVR_DSR));
1111 #else*/
1112                 port->COR2 |= COR2_CTSAE;
1113 /*#endif*/
1114                 if (bp->flags&AURORA_BOARD_DTR_FLOW_OK) {
1115                         mcor1 |= AURORA_RXTH;
1116                 }
1117         }
1118         /* Enable Software Flow Control. FIXME: I'm not sure about this */
1119         /* Some people reported that it works, but I still doubt */
1120         if (I_IXON(tty))  {
1121                 port->COR2 |= COR2_TXIBE;
1122                 cor3 |= (COR3_FCT | COR3_SCDE);
1123                 if (I_IXANY(tty))
1124                         port->COR2 |= COR2_IXM;
1125                 sbus_writeb(START_CHAR(tty),
1126                             &bp->r[chip]->r[CD180_SCHR1]);
1127                 sbus_writeb(STOP_CHAR(tty),
1128                             &bp->r[chip]->r[CD180_SCHR2]);
1129                 sbus_writeb(START_CHAR(tty),
1130                             &bp->r[chip]->r[CD180_SCHR3]);
1131                 sbus_writeb(STOP_CHAR(tty),
1132                             &bp->r[chip]->r[CD180_SCHR4]);
1133         }
1134         if (!C_CLOCAL(tty))  {
1135                 /* Enable CD check */
1136                 port->SRER |= SRER_CD;
1137                 mcor1 |= MCOR1_CDZD;
1138                 mcor2 |= MCOR2_CDOD;
1139         }
1140
1141         if (C_CREAD(tty))
1142                 /* Enable receiver */
1143                 port->SRER |= SRER_RXD;
1144
1145         /* Set input FIFO size (1-8 bytes) */
1146         cor3 |= AURORA_RXFIFO;
1147         /* Setting up CD180 channel registers */
1148         sbus_writeb(cor1, &bp->r[chip]->r[CD180_COR1]);
1149         sbus_writeb(port->COR2, &bp->r[chip]->r[CD180_COR2]);
1150         sbus_writeb(cor3, &bp->r[chip]->r[CD180_COR3]);
1151         /* Make CD180 know about registers change */
1152         aurora_wait_CCR(bp->r[chip]);
1153         sbus_writeb(CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3,
1154                     &bp->r[chip]->r[CD180_CCR]);
1155         /* Setting up modem option registers */
1156         sbus_writeb(mcor1, &bp->r[chip]->r[CD180_MCOR1]);
1157         sbus_writeb(mcor2, &bp->r[chip]->r[CD180_MCOR2]);
1158         /* Enable CD180 transmitter & receiver */
1159         aurora_wait_CCR(bp->r[chip]);
1160         sbus_writeb(CCR_TXEN | CCR_RXEN, &bp->r[chip]->r[CD180_CCR]);
1161         /* Enable interrupts */
1162         sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1163         /* And finally set RTS on */
1164         sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1165 #ifdef AURORA_DEBUG
1166         printk("aurora_change_speed: end\n");
1167 #endif
1168 }
1169
1170 /* Must be called with interrupts enabled */
1171 static int aurora_setup_port(struct Aurora_board *bp, struct Aurora_port *port)
1172 {
1173         unsigned long flags;
1174
1175 #ifdef AURORA_DEBUG
1176         printk("aurora_setup_port: start %d\n",port_No(port));
1177 #endif
1178         if (port->flags & ASYNC_INITIALIZED)
1179                 return 0;
1180
1181         if (!port->xmit_buf) {
1182                 /* We may sleep in get_zeroed_page() */
1183                 unsigned long tmp;
1184
1185                 if (!(tmp = get_zeroed_page(GFP_KERNEL)))
1186                         return -ENOMEM;
1187
1188                 if (port->xmit_buf) {
1189                         free_page(tmp);
1190                         return -ERESTARTSYS;
1191                 }
1192                 port->xmit_buf = (unsigned char *) tmp;
1193         }
1194
1195         save_flags(flags); cli();
1196
1197         if (port->tty)
1198                 clear_bit(TTY_IO_ERROR, &port->tty->flags);
1199
1200 #ifdef MODULE
1201         if ((port->count == 1) && ((++bp->count) == 1))
1202                         bp->flags |= AURORA_BOARD_ACTIVE;
1203 #endif
1204
1205         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1206         aurora_change_speed(bp, port);
1207         port->flags |= ASYNC_INITIALIZED;
1208
1209         restore_flags(flags);
1210 #ifdef AURORA_DEBUG
1211         printk("aurora_setup_port: end\n");
1212 #endif
1213         return 0;
1214 }
1215
1216 /* Must be called with interrupts disabled */
1217 static void aurora_shutdown_port(struct Aurora_board *bp, struct Aurora_port *port)
1218 {
1219         struct tty_struct *tty;
1220         unsigned char chip;
1221
1222 #ifdef AURORA_DEBUG
1223         printk("aurora_shutdown_port: start\n");
1224 #endif
1225         if (!(port->flags & ASYNC_INITIALIZED))
1226                 return;
1227
1228         chip = AURORA_CD180(port_No(port));
1229
1230 #ifdef AURORA_REPORT_OVERRUN
1231         printk("aurora%d: port %d: Total %ld overruns were detected.\n",
1232                board_No(bp), port_No(port), port->overrun);
1233 #endif
1234 #ifdef AURORA_REPORT_FIFO
1235         {
1236                 int i;
1237
1238                 printk("aurora%d: port %d: FIFO hits [ ",
1239                        board_No(bp), port_No(port));
1240                 for (i = 0; i < 10; i++)  {
1241                         printk("%ld ", port->hits[i]);
1242                 }
1243                 printk("].\n");
1244         }
1245 #endif
1246         if (port->xmit_buf)  {
1247                 free_page((unsigned long) port->xmit_buf);
1248                 port->xmit_buf = NULL;
1249         }
1250
1251         if (!(tty = port->tty) || C_HUPCL(tty))  {
1252                 /* Drop DTR */
1253                 port->MSVR &= ~(bp->DTR|bp->RTS);
1254                 sbus_writeb(port->MSVR,
1255                             &bp->r[chip]->r[CD180_MSVR]);
1256         }
1257
1258         /* Select port */
1259         sbus_writeb(port_No(port) & 7,
1260                     &bp->r[chip]->r[CD180_CAR]);
1261         udelay(1);
1262
1263         /* Reset port */
1264         aurora_wait_CCR(bp->r[chip]);
1265         sbus_writeb(CCR_SOFTRESET, &bp->r[chip]->r[CD180_CCR]);
1266
1267         /* Disable all interrupts from this port */
1268         port->SRER = 0;
1269         sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1270
1271         if (tty)
1272                 set_bit(TTY_IO_ERROR, &tty->flags);
1273         port->flags &= ~ASYNC_INITIALIZED;
1274
1275 #ifdef MODULE
1276         if (--bp->count < 0)  {
1277                 printk(KERN_DEBUG "aurora%d: aurora_shutdown_port: "
1278                        "bad board count: %d\n",
1279                        board_No(bp), bp->count);
1280                 bp->count = 0;
1281         }
1282
1283         if (!bp->count)
1284                 bp->flags &= ~AURORA_BOARD_ACTIVE;
1285 #endif
1286
1287 #ifdef AURORA_DEBUG
1288         printk("aurora_shutdown_port: end\n");
1289 #endif
1290 }
1291
1292
1293 static int block_til_ready(struct tty_struct *tty, struct file * filp,
1294                            struct Aurora_port *port)
1295 {
1296         DECLARE_WAITQUEUE(wait, current);
1297         struct Aurora_board *bp = port_Board(port);
1298         int    retval;
1299         int    do_clocal = 0;
1300         int    CD;
1301         unsigned char chip;
1302
1303 #ifdef AURORA_DEBUG
1304         printk("block_til_ready: start\n");
1305 #endif
1306         chip = AURORA_CD180(port_No(port));
1307
1308         /* If the device is in the middle of being closed, then block
1309          * until it's done, and then try again.
1310          */
1311         if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
1312                 interruptible_sleep_on(&port->close_wait);
1313                 if (port->flags & ASYNC_HUP_NOTIFY)
1314                         return -EAGAIN;
1315                 else
1316                         return -ERESTARTSYS;
1317         }
1318
1319         /* If non-blocking mode is set, or the port is not enabled,
1320          * then make the check up front and then exit.
1321          */
1322         if ((filp->f_flags & O_NONBLOCK) ||
1323             (tty->flags & (1 << TTY_IO_ERROR))) {
1324                 port->flags |= ASYNC_NORMAL_ACTIVE;
1325                 return 0;
1326         }
1327
1328         if (C_CLOCAL(tty))
1329                 do_clocal = 1;
1330
1331         /* Block waiting for the carrier detect and the line to become
1332          * free (i.e., not in use by the callout).  While we are in
1333          * this loop, info->count is dropped by one, so that
1334          * rs_close() knows when to free things.  We restore it upon
1335          * exit, either normal or abnormal.
1336          */
1337         retval = 0;
1338         add_wait_queue(&port->open_wait, &wait);
1339         cli();
1340         if (!tty_hung_up_p(filp))
1341                 port->count--;
1342         sti();
1343         port->blocked_open++;
1344         while (1) {
1345                 cli();
1346                 sbus_writeb(port_No(port) & 7,
1347                             &bp->r[chip]->r[CD180_CAR]);
1348                 udelay(1);
1349                 CD = sbus_readb(&bp->r[chip]->r[CD180_MSVR]) & MSVR_CD;
1350                 port->MSVR=bp->RTS;
1351
1352                 /* auto drops DTR */
1353                 sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1354                 sti();
1355                 set_current_state(TASK_INTERRUPTIBLE);
1356                 if (tty_hung_up_p(filp) ||
1357                     !(port->flags & ASYNC_INITIALIZED)) {
1358                         if (port->flags & ASYNC_HUP_NOTIFY)
1359                                 retval = -EAGAIN;
1360                         else
1361                                 retval = -ERESTARTSYS;
1362                         break;
1363                 }
1364                 if (!(port->flags & ASYNC_CLOSING) &&
1365                     (do_clocal || CD))
1366                         break;
1367                 if (signal_pending(current)) {
1368                         retval = -ERESTARTSYS;
1369                         break;
1370                 }
1371                 schedule();
1372         }
1373         current->state = TASK_RUNNING;
1374         remove_wait_queue(&port->open_wait, &wait);
1375         if (!tty_hung_up_p(filp))
1376                 port->count++;
1377         port->blocked_open--;
1378         if (retval)
1379                 return retval;
1380
1381         port->flags |= ASYNC_NORMAL_ACTIVE;
1382 #ifdef AURORA_DEBUG
1383         printk("block_til_ready: end\n");
1384 #endif
1385         return 0;
1386 }
1387
1388 static int aurora_open(struct tty_struct * tty, struct file * filp)
1389 {
1390         int board;
1391         int error;
1392         struct Aurora_port * port;
1393         struct Aurora_board * bp;
1394         unsigned long flags;
1395
1396 #ifdef AURORA_DEBUG
1397         printk("aurora_open: start\n");
1398 #endif
1399
1400         board = AURORA_BOARD(tty->index);
1401         if (board > AURORA_NBOARD ||
1402             !(aurora_board[board].flags & AURORA_BOARD_PRESENT)) {
1403 #ifdef AURORA_DEBUG
1404                 printk("aurora_open: error board %d present %d\n",
1405                        board, aurora_board[board].flags & AURORA_BOARD_PRESENT);
1406 #endif
1407                 return -ENODEV;
1408         }
1409
1410         bp = &aurora_board[board];
1411         port = aurora_port + board * AURORA_NPORT * AURORA_NCD180 + AURORA_PORT(tty->index);
1412         if ((aurora_paranoia_check(port, tty->name, "aurora_open")) {
1413 #ifdef AURORA_DEBUG
1414                 printk("aurora_open: error paranoia check\n");
1415 #endif
1416                 return -ENODEV;
1417         }
1418
1419         port->count++;
1420         tty->driver_data = port;
1421         port->tty = tty;
1422
1423         if ((error = aurora_setup_port(bp, port))) {
1424 #ifdef AURORA_DEBUG
1425                 printk("aurora_open: error aurora_setup_port ret %d\n",error);
1426 #endif
1427                 return error;
1428         }
1429
1430         if ((error = block_til_ready(tty, filp, port))) {
1431 #ifdef AURORA_DEBUG
1432                 printk("aurora_open: error block_til_ready ret %d\n",error);
1433 #endif
1434                 return error;
1435         }
1436
1437 #ifdef AURORA_DEBUG
1438         printk("aurora_open: end\n");
1439 #endif
1440         return 0;
1441 }
1442
1443 static void aurora_close(struct tty_struct * tty, struct file * filp)
1444 {
1445         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1446         struct Aurora_board *bp;
1447         unsigned long flags;
1448         unsigned long timeout;
1449         unsigned char chip;
1450
1451 #ifdef AURORA_DEBUG
1452         printk("aurora_close: start\n");
1453 #endif
1454
1455         if (!port || (aurora_paranoia_check(port, tty->name, "close"))
1456                 return;
1457
1458         chip = AURORA_CD180(port_No(port));
1459
1460         save_flags(flags); cli();
1461         if (tty_hung_up_p(filp))  {
1462                 restore_flags(flags);
1463                 return;
1464         }
1465
1466         bp = port_Board(port);
1467         if ((tty->count == 1) && (port->count != 1))  {
1468                 printk(KERN_DEBUG "aurora%d: aurora_close: bad port count; "
1469                        "tty->count is 1, port count is %d\n",
1470                        board_No(bp), port->count);
1471                 port->count = 1;
1472         }
1473         if (--port->count < 0)  {
1474                 printk(KERN_DEBUG "aurora%d: aurora_close: bad port "
1475                        "count for tty%d: %d\n",
1476                        board_No(bp), port_No(port), port->count);
1477                 port->count = 0;
1478         }
1479         if (port->count)  {
1480                 restore_flags(flags);
1481                 return;
1482         }
1483         port->flags |= ASYNC_CLOSING;
1484
1485         /* Now we wait for the transmit buffer to clear; and we notify
1486          * the line discipline to only process XON/XOFF characters.
1487          */
1488         tty->closing = 1;
1489         if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE){
1490 #ifdef AURORA_DEBUG
1491                 printk("aurora_close: waiting to flush...\n");
1492 #endif
1493                 tty_wait_until_sent(tty, port->closing_wait);
1494         }
1495
1496         /* At this point we stop accepting input.  To do this, we
1497          * disable the receive line status interrupts, and tell the
1498          * interrupt driver to stop checking the data ready bit in the
1499          * line status register.
1500          */
1501         port->SRER &= ~SRER_RXD;
1502         if (port->flags & ASYNC_INITIALIZED) {
1503                 port->SRER &= ~SRER_TXRDY;
1504                 port->SRER |= SRER_TXEMPTY;
1505                 sbus_writeb(port_No(port) & 7,
1506                             &bp->r[chip]->r[CD180_CAR]);
1507                 udelay(1);
1508                 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1509                 /*
1510                  * Before we drop DTR, make sure the UART transmitter
1511                  * has completely drained; this is especially
1512                  * important if there is a transmit FIFO!
1513                  */
1514                 timeout = jiffies+HZ;
1515                 while(port->SRER & SRER_TXEMPTY)  {
1516                         msleep_interruptible(jiffies_to_msecs(port->timeout));
1517                         if (time_after(jiffies, timeout))
1518                                 break;
1519                 }
1520         }
1521 #ifdef AURORA_DEBUG
1522         printk("aurora_close: shutdown_port\n");
1523 #endif
1524         aurora_shutdown_port(bp, port);
1525         if (tty->driver->flush_buffer)
1526                 tty->driver->flush_buffer(tty);
1527         tty_ldisc_flush(tty);
1528         tty->closing = 0;
1529         port->event = 0;
1530         port->tty = 0;
1531         if (port->blocked_open) {
1532                 if (port->close_delay) {
1533                         msleep_interruptible(jiffies_to_msecs(port->close_delay));
1534                 }
1535                 wake_up_interruptible(&port->open_wait);
1536         }
1537         port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1538         wake_up_interruptible(&port->close_wait);
1539         restore_flags(flags);
1540 #ifdef AURORA_DEBUG
1541         printk("aurora_close: end\n");
1542 #endif
1543 }
1544
1545 static int aurora_write(struct tty_struct * tty,
1546                         const unsigned char *buf, int count)
1547 {
1548         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1549         struct Aurora_board *bp;
1550         int c, total = 0;
1551         unsigned long flags;
1552         unsigned char chip;
1553
1554 #ifdef AURORA_DEBUG
1555         printk("aurora_write: start %d\n",count);
1556 #endif
1557         if ((aurora_paranoia_check(port, tty->name, "aurora_write"))
1558                 return 0;
1559
1560         chip = AURORA_CD180(port_No(port));
1561
1562         bp = port_Board(port);
1563
1564         if (!tty || !port->xmit_buf || !tmp_buf)
1565                 return 0;
1566
1567         save_flags(flags);
1568         while (1) {
1569                 cli();
1570                 c = min(count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
1571                                    SERIAL_XMIT_SIZE - port->xmit_head));
1572                 if (c <= 0) {
1573                         restore_flags(flags);
1574                         break;
1575                 }
1576                 memcpy(port->xmit_buf + port->xmit_head, buf, c);
1577                 port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
1578                 port->xmit_cnt += c;
1579                 restore_flags(flags);
1580
1581                 buf += c;
1582                 count -= c;
1583                 total += c;
1584         }
1585
1586         cli();
1587         if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped &&
1588             !(port->SRER & SRER_TXRDY)) {
1589                 port->SRER |= SRER_TXRDY;
1590                 sbus_writeb(port_No(port) & 7,
1591                             &bp->r[chip]->r[CD180_CAR]);
1592                 udelay(1);
1593                 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1594         }
1595         restore_flags(flags);
1596 #ifdef AURORA_DEBUG
1597         printk("aurora_write: end %d\n",total);
1598 #endif
1599         return total;
1600 }
1601
1602 static void aurora_put_char(struct tty_struct * tty, unsigned char ch)
1603 {
1604         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1605         unsigned long flags;
1606
1607 #ifdef AURORA_DEBUG
1608         printk("aurora_put_char: start %c\n",ch);
1609 #endif
1610         if ((aurora_paranoia_check(port, tty->name, "aurora_put_char"))
1611                 return;
1612
1613         if (!tty || !port->xmit_buf)
1614                 return;
1615
1616         save_flags(flags); cli();
1617
1618         if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
1619                 restore_flags(flags);
1620                 return;
1621         }
1622
1623         port->xmit_buf[port->xmit_head++] = ch;
1624         port->xmit_head &= SERIAL_XMIT_SIZE - 1;
1625         port->xmit_cnt++;
1626         restore_flags(flags);
1627 #ifdef AURORA_DEBUG
1628         printk("aurora_put_char: end\n");
1629 #endif
1630 }
1631
1632 static void aurora_flush_chars(struct tty_struct * tty)
1633 {
1634         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1635         unsigned long flags;
1636         unsigned char chip;
1637
1638 /*#ifdef AURORA_DEBUG
1639         printk("aurora_flush_chars: start\n");
1640 #endif*/
1641         if ((aurora_paranoia_check(port, tty->name, "aurora_flush_chars"))
1642                 return;
1643
1644         chip = AURORA_CD180(port_No(port));
1645
1646         if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1647             !port->xmit_buf)
1648                 return;
1649
1650         save_flags(flags); cli();
1651         port->SRER |= SRER_TXRDY;
1652         sbus_writeb(port_No(port) & 7,
1653                     &port_Board(port)->r[chip]->r[CD180_CAR]);
1654         udelay(1);
1655         sbus_writeb(port->SRER,
1656                     &port_Board(port)->r[chip]->r[CD180_SRER]);
1657         restore_flags(flags);
1658 /*#ifdef AURORA_DEBUG
1659         printk("aurora_flush_chars: end\n");
1660 #endif*/
1661 }
1662
1663 static int aurora_write_room(struct tty_struct * tty)
1664 {
1665         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1666         int     ret;
1667
1668 #ifdef AURORA_DEBUG
1669         printk("aurora_write_room: start\n");
1670 #endif
1671         if ((aurora_paranoia_check(port, tty->name, "aurora_write_room"))
1672                 return 0;
1673
1674         ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1675         if (ret < 0)
1676                 ret = 0;
1677 #ifdef AURORA_DEBUG
1678         printk("aurora_write_room: end\n");
1679 #endif
1680         return ret;
1681 }
1682
1683 static int aurora_chars_in_buffer(struct tty_struct *tty)
1684 {
1685         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1686
1687         if ((aurora_paranoia_check(port, tty->name, "aurora_chars_in_buffer"))
1688                 return 0;
1689
1690         return port->xmit_cnt;
1691 }
1692
1693 static void aurora_flush_buffer(struct tty_struct *tty)
1694 {
1695         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1696         unsigned long flags;
1697
1698 #ifdef AURORA_DEBUG
1699         printk("aurora_flush_buffer: start\n");
1700 #endif
1701         if ((aurora_paranoia_check(port, tty->name, "aurora_flush_buffer"))
1702                 return;
1703
1704         save_flags(flags); cli();
1705         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1706         restore_flags(flags);
1707
1708         tty_wakeup(tty);
1709 #ifdef AURORA_DEBUG
1710         printk("aurora_flush_buffer: end\n");
1711 #endif
1712 }
1713
1714 static int aurora_tiocmget(struct tty_struct *tty, struct file *file)
1715 {
1716         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1717         struct Aurora_board * bp;
1718         unsigned char status,chip;
1719         unsigned int result;
1720         unsigned long flags;
1721
1722 #ifdef AURORA_DEBUG
1723         printk("aurora_get_modem_info: start\n");
1724 #endif
1725         if ((aurora_paranoia_check(port, tty->name, __FUNCTION__))
1726                 return -ENODEV;
1727
1728         chip = AURORA_CD180(port_No(port));
1729
1730         bp = port_Board(port);
1731
1732         save_flags(flags); cli();
1733
1734         sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1735         udelay(1);
1736
1737         status = sbus_readb(&bp->r[chip]->r[CD180_MSVR]);
1738         result = 0/*bp->r[chip]->r[AURORA_RI] & (1u << port_No(port)) ? 0 : TIOCM_RNG*/;
1739
1740         restore_flags(flags);
1741
1742         result |= ((status & bp->RTS) ? TIOCM_RTS : 0)
1743                 | ((status & bp->DTR) ? TIOCM_DTR : 0)
1744                 | ((status & MSVR_CD)  ? TIOCM_CAR : 0)
1745                 | ((status & MSVR_DSR) ? TIOCM_DSR : 0)
1746                 | ((status & MSVR_CTS) ? TIOCM_CTS : 0);
1747
1748 #ifdef AURORA_DEBUG
1749         printk("aurora_get_modem_info: end\n");
1750 #endif
1751         return result;
1752 }
1753
1754 static int aurora_tiocmset(struct tty_struct *tty, struct file *file,
1755                            unsigned int set, unsigned int clear)
1756 {
1757         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1758         unsigned int arg;
1759         unsigned long flags;
1760         struct Aurora_board *bp = port_Board(port);
1761         unsigned char chip;
1762
1763 #ifdef AURORA_DEBUG
1764         printk("aurora_set_modem_info: start\n");
1765 #endif
1766         if ((aurora_paranoia_check(port, tty->name, __FUNCTION__))
1767                 return -ENODEV;
1768
1769         chip = AURORA_CD180(port_No(port));
1770
1771         save_flags(flags); cli();
1772         if (set & TIOCM_RTS)
1773                 port->MSVR |= bp->RTS;
1774         if (set & TIOCM_DTR)
1775                 port->MSVR |= bp->DTR;
1776         if (clear & TIOCM_RTS)
1777                 port->MSVR &= ~bp->RTS;
1778         if (clear & TIOCM_DTR)
1779                 port->MSVR &= ~bp->DTR;
1780
1781         sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1782         udelay(1);
1783
1784         sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1785
1786         restore_flags(flags);
1787 #ifdef AURORA_DEBUG
1788         printk("aurora_set_modem_info: end\n");
1789 #endif
1790         return 0;
1791 }
1792
1793 static void aurora_send_break(struct Aurora_port * port, unsigned long length)
1794 {
1795         struct Aurora_board *bp = port_Board(port);
1796         unsigned long flags;
1797         unsigned char chip;
1798
1799 #ifdef AURORA_DEBUG
1800         printk("aurora_send_break: start\n");
1801 #endif
1802         chip = AURORA_CD180(port_No(port));
1803
1804         save_flags(flags); cli();
1805
1806         port->break_length = AURORA_TPS / HZ * length;
1807         port->COR2 |= COR2_ETC;
1808         port->SRER  |= SRER_TXRDY;
1809         sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1810         udelay(1);
1811
1812         sbus_writeb(port->COR2, &bp->r[chip]->r[CD180_COR2]);
1813         sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1814         aurora_wait_CCR(bp->r[chip]);
1815
1816         sbus_writeb(CCR_CORCHG2, &bp->r[chip]->r[CD180_CCR]);
1817         aurora_wait_CCR(bp->r[chip]);
1818
1819         restore_flags(flags);
1820 #ifdef AURORA_DEBUG
1821         printk("aurora_send_break: end\n");
1822 #endif
1823 }
1824
1825 static int aurora_set_serial_info(struct Aurora_port * port,
1826                                   struct serial_struct * newinfo)
1827 {
1828         struct serial_struct tmp;
1829         struct Aurora_board *bp = port_Board(port);
1830         int change_speed;
1831         unsigned long flags;
1832
1833 #ifdef AURORA_DEBUG
1834         printk("aurora_set_serial_info: start\n");
1835 #endif
1836         if (copy_from_user(&tmp, newinfo, sizeof(tmp)))
1837                 return -EFAULT;
1838 #if 0
1839         if ((tmp.irq != bp->irq) ||
1840             (tmp.port != bp->base) ||
1841             (tmp.type != PORT_CIRRUS) ||
1842             (tmp.baud_base != (bp->oscfreq + CD180_TPC/2) / CD180_TPC) ||
1843             (tmp.custom_divisor != 0) ||
1844             (tmp.xmit_fifo_size != CD180_NFIFO) ||
1845             (tmp.flags & ~AURORA_LEGAL_FLAGS))
1846                 return -EINVAL;
1847 #endif
1848
1849         change_speed = ((port->flags & ASYNC_SPD_MASK) !=
1850                         (tmp.flags & ASYNC_SPD_MASK));
1851
1852         if (!capable(CAP_SYS_ADMIN)) {
1853                 if ((tmp.close_delay != port->close_delay) ||
1854                     (tmp.closing_wait != port->closing_wait) ||
1855                     ((tmp.flags & ~ASYNC_USR_MASK) !=
1856                      (port->flags & ~ASYNC_USR_MASK)))
1857                         return -EPERM;
1858                 port->flags = ((port->flags & ~ASYNC_USR_MASK) |
1859                                (tmp.flags & ASYNC_USR_MASK));
1860         } else  {
1861                 port->flags = ((port->flags & ~ASYNC_FLAGS) |
1862                                (tmp.flags & ASYNC_FLAGS));
1863                 port->close_delay = tmp.close_delay;
1864                 port->closing_wait = tmp.closing_wait;
1865         }
1866         if (change_speed)  {
1867                 save_flags(flags); cli();
1868                 aurora_change_speed(bp, port);
1869                 restore_flags(flags);
1870         }
1871 #ifdef AURORA_DEBUG
1872         printk("aurora_set_serial_info: end\n");
1873 #endif
1874         return 0;
1875 }
1876
1877 extern int aurora_get_serial_info(struct Aurora_port * port,
1878                                   struct serial_struct * retinfo)
1879 {
1880         struct serial_struct tmp;
1881         struct Aurora_board *bp = port_Board(port);
1882
1883 #ifdef AURORA_DEBUG
1884         printk("aurora_get_serial_info: start\n");
1885 #endif
1886         if (!access_ok(VERIFY_WRITE, (void *) retinfo, sizeof(tmp)))
1887                 return -EFAULT;
1888
1889         memset(&tmp, 0, sizeof(tmp));
1890         tmp.type = PORT_CIRRUS;
1891         tmp.line = port - aurora_port;
1892         tmp.port = 0;
1893         tmp.irq  = bp->irq;
1894         tmp.flags = port->flags;
1895         tmp.baud_base = (bp->oscfreq + CD180_TPC/2) / CD180_TPC;
1896         tmp.close_delay = port->close_delay * HZ/100;
1897         tmp.closing_wait = port->closing_wait * HZ/100;
1898         tmp.xmit_fifo_size = CD180_NFIFO;
1899         copy_to_user(retinfo, &tmp, sizeof(tmp));
1900 #ifdef AURORA_DEBUG
1901 printk("aurora_get_serial_info: end\n");
1902 #endif
1903         return 0;
1904 }
1905
1906 static int aurora_ioctl(struct tty_struct * tty, struct file * filp,
1907                     unsigned int cmd, unsigned long arg)
1908
1909 {
1910         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1911         int retval;
1912
1913 #ifdef AURORA_DEBUG
1914         printk("aurora_ioctl: start\n");
1915 #endif
1916         if ((aurora_paranoia_check(port, tty->name, "aurora_ioctl"))
1917                 return -ENODEV;
1918
1919         switch (cmd) {
1920         case TCSBRK:    /* SVID version: non-zero arg --> no break */
1921                 retval = tty_check_change(tty);
1922                 if (retval)
1923                         return retval;
1924                 tty_wait_until_sent(tty, 0);
1925                 if (!arg)
1926                         aurora_send_break(port, HZ/4);  /* 1/4 second */
1927                 return 0;
1928         case TCSBRKP:   /* support for POSIX tcsendbreak() */
1929                 retval = tty_check_change(tty);
1930                 if (retval)
1931                         return retval;
1932                 tty_wait_until_sent(tty, 0);
1933                 aurora_send_break(port, arg ? arg*(HZ/10) : HZ/4);
1934                 return 0;
1935         case TIOCGSOFTCAR:
1936                 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long *)arg);
1937         case TIOCSSOFTCAR:
1938                 if (get_user(arg,(unsigned long *)arg))
1939                         return -EFAULT;
1940                 tty->termios->c_cflag =
1941                         ((tty->termios->c_cflag & ~CLOCAL) |
1942                          (arg ? CLOCAL : 0));
1943                 return 0;
1944         case TIOCGSERIAL:
1945                 return aurora_get_serial_info(port, (struct serial_struct *) arg);
1946         case TIOCSSERIAL:
1947                 return aurora_set_serial_info(port, (struct serial_struct *) arg);
1948         default:
1949                 return -ENOIOCTLCMD;
1950         };
1951 #ifdef AURORA_DEBUG
1952         printk("aurora_ioctl: end\n");
1953 #endif
1954         return 0;
1955 }
1956
1957 static void aurora_throttle(struct tty_struct * tty)
1958 {
1959         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1960         struct Aurora_board *bp;
1961         unsigned long flags;
1962         unsigned char chip;
1963
1964 #ifdef AURORA_DEBUG
1965         printk("aurora_throttle: start\n");
1966 #endif
1967         if ((aurora_paranoia_check(port, tty->name, "aurora_throttle"))
1968                 return;
1969
1970         bp = port_Board(port);
1971         chip = AURORA_CD180(port_No(port));
1972
1973         save_flags(flags); cli();
1974         port->MSVR &= ~bp->RTS;
1975         sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1976         udelay(1);
1977         if (I_IXOFF(tty))  {
1978                 aurora_wait_CCR(bp->r[chip]);
1979                 sbus_writeb(CCR_SSCH2, &bp->r[chip]->r[CD180_CCR]);
1980                 aurora_wait_CCR(bp->r[chip]);
1981         }
1982         sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1983         restore_flags(flags);
1984 #ifdef AURORA_DEBUG
1985         printk("aurora_throttle: end\n");
1986 #endif
1987 }
1988
1989 static void aurora_unthrottle(struct tty_struct * tty)
1990 {
1991         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1992         struct Aurora_board *bp;
1993         unsigned long flags;
1994         unsigned char chip;
1995
1996 #ifdef AURORA_DEBUG
1997         printk("aurora_unthrottle: start\n");
1998 #endif
1999         if ((aurora_paranoia_check(port, tty->name, "aurora_unthrottle"))
2000                 return;
2001
2002         bp = port_Board(port);
2003
2004         chip = AURORA_CD180(port_No(port));
2005
2006         save_flags(flags); cli();
2007         port->MSVR |= bp->RTS;
2008         sbus_writeb(port_No(port) & 7,
2009                     &bp->r[chip]->r[CD180_CAR]);
2010         udelay(1);
2011         if (I_IXOFF(tty))  {
2012                 aurora_wait_CCR(bp->r[chip]);
2013                 sbus_writeb(CCR_SSCH1,
2014                             &bp->r[chip]->r[CD180_CCR]);
2015                 aurora_wait_CCR(bp->r[chip]);
2016         }
2017         sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
2018         restore_flags(flags);
2019 #ifdef AURORA_DEBUG
2020         printk("aurora_unthrottle: end\n");
2021 #endif
2022 }
2023
2024 static void aurora_stop(struct tty_struct * tty)
2025 {
2026         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2027         struct Aurora_board *bp;
2028         unsigned long flags;
2029         unsigned char chip;
2030
2031 #ifdef AURORA_DEBUG
2032         printk("aurora_stop: start\n");
2033 #endif
2034         if ((aurora_paranoia_check(port, tty->name, "aurora_stop"))
2035                 return;
2036
2037         bp = port_Board(port);
2038
2039         chip = AURORA_CD180(port_No(port));
2040
2041         save_flags(flags); cli();
2042         port->SRER &= ~SRER_TXRDY;
2043         sbus_writeb(port_No(port) & 7,
2044                     &bp->r[chip]->r[CD180_CAR]);
2045         udelay(1);
2046         sbus_writeb(port->SRER,
2047                     &bp->r[chip]->r[CD180_SRER]);
2048         restore_flags(flags);
2049 #ifdef AURORA_DEBUG
2050         printk("aurora_stop: end\n");
2051 #endif
2052 }
2053
2054 static void aurora_start(struct tty_struct * tty)
2055 {
2056         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2057         struct Aurora_board *bp;
2058         unsigned long flags;
2059         unsigned char chip;
2060
2061 #ifdef AURORA_DEBUG
2062         printk("aurora_start: start\n");
2063 #endif
2064         if ((aurora_paranoia_check(port, tty->name, "aurora_start"))
2065                 return;
2066
2067         bp = port_Board(port);
2068
2069         chip = AURORA_CD180(port_No(port));
2070
2071         save_flags(flags); cli();
2072         if (port->xmit_cnt && port->xmit_buf && !(port->SRER & SRER_TXRDY))  {
2073                 port->SRER |= SRER_TXRDY;
2074                 sbus_writeb(port_No(port) & 7,
2075                             &bp->r[chip]->r[CD180_CAR]);
2076                 udelay(1);
2077                 sbus_writeb(port->SRER,
2078                             &bp->r[chip]->r[CD180_SRER]);
2079         }
2080         restore_flags(flags);
2081 #ifdef AURORA_DEBUG
2082         printk("aurora_start: end\n");
2083 #endif
2084 }
2085
2086 /*
2087  * This routine is called from the scheduler tqueue when the interrupt
2088  * routine has signalled that a hangup has occurred.  The path of
2089  * hangup processing is:
2090  *
2091  *      serial interrupt routine -> (scheduler tqueue) ->
2092  *      do_aurora_hangup() -> tty->hangup() -> aurora_hangup()
2093  *
2094  */
2095 static void do_aurora_hangup(void *private_)
2096 {
2097         struct Aurora_port      *port = (struct Aurora_port *) private_;
2098         struct tty_struct       *tty;
2099
2100 #ifdef AURORA_DEBUG
2101         printk("do_aurora_hangup: start\n");
2102 #endif
2103         tty = port->tty;
2104         if (tty != NULL) {
2105                 tty_hangup(tty);        /* FIXME: module removal race - AKPM */
2106 #ifdef AURORA_DEBUG
2107                 printk("do_aurora_hangup: end\n");
2108 #endif
2109         }
2110 }
2111
2112 static void aurora_hangup(struct tty_struct * tty)
2113 {
2114         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2115         struct Aurora_board *bp;
2116
2117 #ifdef AURORA_DEBUG
2118         printk("aurora_hangup: start\n");
2119 #endif
2120         if ((aurora_paranoia_check(port, tty->name, "aurora_hangup"))
2121                 return;
2122
2123         bp = port_Board(port);
2124
2125         aurora_shutdown_port(bp, port);
2126         port->event = 0;
2127         port->count = 0;
2128         port->flags &= ~ASYNC_NORMAL_ACTIVE;
2129         port->tty = 0;
2130         wake_up_interruptible(&port->open_wait);
2131 #ifdef AURORA_DEBUG
2132         printk("aurora_hangup: end\n");
2133 #endif
2134 }
2135
2136 static void aurora_set_termios(struct tty_struct * tty, struct termios * old_termios)
2137 {
2138         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2139         unsigned long flags;
2140
2141 #ifdef AURORA_DEBUG
2142         printk("aurora_set_termios: start\n");
2143 #endif
2144         if ((aurora_paranoia_check(port, tty->name, "aurora_set_termios"))
2145                 return;
2146
2147         if (tty->termios->c_cflag == old_termios->c_cflag &&
2148             tty->termios->c_iflag == old_termios->c_iflag)
2149                 return;
2150
2151         save_flags(flags); cli();
2152         aurora_change_speed(port_Board(port), port);
2153         restore_flags(flags);
2154
2155         if ((old_termios->c_cflag & CRTSCTS) &&
2156             !(tty->termios->c_cflag & CRTSCTS)) {
2157                 tty->hw_stopped = 0;
2158                 aurora_start(tty);
2159         }
2160 #ifdef AURORA_DEBUG
2161         printk("aurora_set_termios: end\n");
2162 #endif
2163 }
2164
2165 static void do_aurora_bh(void)
2166 {
2167          run_task_queue(&tq_aurora);
2168 }
2169
2170 static void do_softint(void *private_)
2171 {
2172         struct Aurora_port      *port = (struct Aurora_port *) private_;
2173         struct tty_struct       *tty;
2174
2175 #ifdef AURORA_DEBUG
2176         printk("do_softint: start\n");
2177 #endif
2178         tty = port->tty;
2179         if (tty == NULL)
2180                 return;
2181
2182         if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) {
2183                 tty_wakeup(tty);
2184         }
2185 #ifdef AURORA_DEBUG
2186         printk("do_softint: end\n");
2187 #endif
2188 }
2189
2190 static struct tty_operations aurora_ops = {
2191         .open  = aurora_open,
2192         .close = aurora_close,
2193         .write = aurora_write,
2194         .put_char = aurora_put_char,
2195         .flush_chars = aurora_flush_chars,
2196         .write_room = aurora_write_room,
2197         .chars_in_buffer = aurora_chars_in_buffer,
2198         .flush_buffer = aurora_flush_buffer,
2199         .ioctl = aurora_ioctl,
2200         .throttle = aurora_throttle,
2201         .unthrottle = aurora_unthrottle,
2202         .set_termios = aurora_set_termios,
2203         .stop = aurora_stop,
2204         .start = aurora_start,
2205         .hangup = aurora_hangup,
2206         .tiocmget = aurora_tiocmget,
2207         .tiocmset = aurora_tiocmset,
2208 };
2209
2210 static int aurora_init_drivers(void)
2211 {
2212         int error;
2213         int i;
2214
2215 #ifdef AURORA_DEBUG
2216         printk("aurora_init_drivers: start\n");
2217 #endif
2218         tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL);
2219         if (tmp_buf == NULL) {
2220                 printk(KERN_ERR "aurora: Couldn't get free page.\n");
2221                 return 1;
2222         }
2223         init_bh(AURORA_BH, do_aurora_bh);
2224         aurora_driver = alloc_tty_driver(AURORA_INPORTS);
2225         if (!aurora_driver) {
2226                 printk(KERN_ERR "aurora: Couldn't allocate tty driver.\n");
2227                 free_page((unsigned long) tmp_buf);
2228                 return 1;
2229         }
2230         aurora_driver->owner = THIS_MODULE;
2231         aurora_driver->name = "ttyA";
2232         aurora_driver->major = AURORA_MAJOR;
2233         aurora_driver->type = TTY_DRIVER_TYPE_SERIAL;
2234         aurora_driver->subtype = SERIAL_TYPE_NORMAL;
2235         aurora_driver->init_termios = tty_std_termios;
2236         aurora_driver->init_termios.c_cflag =
2237                 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2238         aurora_driver->flags = TTY_DRIVER_REAL_RAW;
2239         tty_set_operations(aurora_driver, &aurora_ops);
2240         error = tty_register_driver(aurora_driver);
2241         if (error) {
2242                 put_tty_driver(aurora_driver);
2243                 free_page((unsigned long) tmp_buf);
2244                 printk(KERN_ERR "aurora: Couldn't register aurora driver, error = %d\n",
2245                        error);
2246                 return 1;
2247         }
2248
2249         memset(aurora_port, 0, sizeof(aurora_port));
2250         for (i = 0; i < AURORA_TNPORTS; i++)  {
2251                 aurora_port[i].magic = AURORA_MAGIC;
2252                 aurora_port[i].tqueue.routine = do_softint;
2253                 aurora_port[i].tqueue.data = &aurora_port[i];
2254                 aurora_port[i].tqueue_hangup.routine = do_aurora_hangup;
2255                 aurora_port[i].tqueue_hangup.data = &aurora_port[i];
2256                 aurora_port[i].close_delay = 50 * HZ/100;
2257                 aurora_port[i].closing_wait = 3000 * HZ/100;
2258                 init_waitqueue_head(&aurora_port[i].open_wait);
2259                 init_waitqueue_head(&aurora_port[i].close_wait);
2260         }
2261 #ifdef AURORA_DEBUG
2262         printk("aurora_init_drivers: end\n");
2263 #endif
2264         return 0;
2265 }
2266
2267 static void aurora_release_drivers(void)
2268 {
2269 #ifdef AURORA_DEBUG
2270         printk("aurora_release_drivers: start\n");
2271 #endif
2272         free_page((unsigned long)tmp_buf);
2273         tty_unregister_driver(aurora_driver);
2274         put_tty_driver(aurora_driver);
2275 #ifdef AURORA_DEBUG
2276         printk("aurora_release_drivers: end\n");
2277 #endif
2278 }
2279
2280 /*
2281  * Called at boot time.
2282  *
2283  * You can specify IO base for up to RC_NBOARD cards,
2284  * using line "riscom8=0xiobase1,0xiobase2,.." at LILO prompt.
2285  * Note that there will be no probing at default
2286  * addresses in this case.
2287  *
2288  */
2289 void __init aurora_setup(char *str, int *ints)
2290 {
2291         int i;
2292
2293         for(i=0;(i<ints[0])&&(i<4);i++) {
2294                 if (ints[i+1]) irqs[i]=ints[i+1];
2295                 }
2296 }
2297
2298 static int __init aurora_real_init(void)
2299 {
2300         int found;
2301         int i;
2302
2303         printk(KERN_INFO "aurora: Driver starting.\n");
2304         if(aurora_init_drivers())
2305                 return -EIO;
2306         found = aurora_probe();
2307         if(!found) {
2308                 aurora_release_drivers();
2309                 printk(KERN_INFO "aurora: No Aurora Multiport boards detected.\n");
2310                 return -EIO;
2311         } else {
2312                 printk(KERN_INFO "aurora: %d boards found.\n", found);
2313         }
2314         for (i = 0; i < found; i++) {
2315                 int ret = aurora_setup_board(&aurora_board[i]);
2316
2317                 if (ret) {
2318 #ifdef AURORA_DEBUG
2319                         printk(KERN_ERR "aurora_init: error aurora_setup_board ret %d\n",
2320                                ret);
2321 #endif
2322                         return ret;
2323                 }
2324         }
2325         return 0;
2326 }
2327
2328 int irq  = 0;
2329 int irq1 = 0;
2330 int irq2 = 0;
2331 int irq3 = 0;
2332 module_param(irq , int, 0);
2333 module_param(irq1, int, 0);
2334 module_param(irq2, int, 0);
2335 module_param(irq3, int, 0);
2336
2337 static int __init aurora_init(void)
2338 {
2339         if (irq ) irqs[0]=irq ;
2340         if (irq1) irqs[1]=irq1;
2341         if (irq2) irqs[2]=irq2;
2342         if (irq3) irqs[3]=irq3;
2343         return aurora_real_init();
2344 }
2345
2346 static void __exit aurora_cleanup(void)
2347 {
2348         int i;
2349
2350 #ifdef AURORA_DEBUG
2351 printk("cleanup_module: aurora_release_drivers\n");
2352 #endif
2353
2354         aurora_release_drivers();
2355         for (i = 0; i < AURORA_NBOARD; i++)
2356                 if (aurora_board[i].flags & AURORA_BOARD_PRESENT) {
2357                         aurora_shutdown_board(&aurora_board[i]);
2358                         aurora_release_io_range(&aurora_board[i]);
2359                 }
2360 }
2361
2362 module_init(aurora_init);
2363 module_exit(aurora_cleanup);
2364 MODULE_LICENSE("GPL");