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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 static DECLARE_MUTEX(tmp_buf_sem);
  96
  97 DECLARE_TASK_QUEUE(tq_aurora);
  98
  99 static inline int aurora_paranoia_check(struct Aurora_port const * port,
 100                                     char *name, const char *routine)
 101 {
 102 #ifdef AURORA_PARANOIA_CHECK
 103         static const char *badmagic =
 104                 KERN_DEBUG "aurora: Warning: bad aurora port magic number for device %s in %s\n";
 105         static const char *badinfo =
 106                 KERN_DEBUG "aurora: Warning: null aurora port for device %s in %s\n";
 107
 108         if (!port) {
 109                 printk(badinfo, name, routine);
 110                 return 1;
 111         }
 112         if (port->magic != AURORA_MAGIC) {
 113                 printk(badmagic, name, routine);
 114                 return 1;
 115         }
 116 #endif
 117         return 0;
 118 }
 119
 120 /*
 121  *
 122  *  Service functions for aurora driver.
 123  *
 124  */
 125
 126 /* Get board number from pointer */
 127 extern inline int board_No (struct Aurora_board const * bp)
 128 {
 129         return bp - aurora_board;
 130 }
 131
 132 /* Get port number from pointer */
 133 extern inline int port_No (struct Aurora_port const * port)
 134 {
 135         return AURORA_PORT(port - aurora_port);
 136 }
 137
 138 /* Get pointer to board from pointer to port */
 139 extern inline struct Aurora_board * port_Board(struct Aurora_port const * port)
 140 {
 141         return &aurora_board[AURORA_BOARD(port - aurora_port)];
 142 }
 143
 144 /* Wait for Channel Command Register ready */
 145 extern inline void aurora_wait_CCR(struct aurora_reg128 * r)
 146 {
 147         unsigned long delay;
 148
 149 #ifdef AURORA_DEBUG
 150 printk("aurora_wait_CCR\n");
 151 #endif
 152         /* FIXME: need something more descriptive than 100000 :) */
 153         for (delay = 100000; delay; delay--)
 154                 if (!sbus_readb(&r->r[CD180_CCR]))
 155                         return;
 156         printk(KERN_DEBUG "aurora: Timeout waiting for CCR.\n");
 157 }
 158
 159 /*
 160  *  aurora probe functions.
 161  */
 162
 163 /* Must be called with enabled interrupts */
 164 extern inline void aurora_long_delay(unsigned long delay)
 165 {
 166         unsigned long i;
 167
 168 #ifdef AURORA_DEBUG
 169         printk("aurora_long_delay: start\n");
 170 #endif
 171         for (i = jiffies + delay; time_before(jiffies, i); ) ;
 172 #ifdef AURORA_DEBUG
 173         printk("aurora_long_delay: end\n");
 174 #endif
 175 }
 176
 177 /* Reset and setup CD180 chip */
 178 static int aurora_init_CD180(struct Aurora_board * bp, int chip)
 179 {
 180         unsigned long flags;
 181         int id;
 182
 183 #ifdef AURORA_DEBUG
 184         printk("aurora_init_CD180: start %d:%d\n",
 185                board_No(bp), chip);
 186 #endif
 187         save_flags(flags); cli();
 188         sbus_writeb(0, &bp->r[chip]->r[CD180_CAR]);
 189         sbus_writeb(0, &bp->r[chip]->r[CD180_GSVR]);
 190
 191         /* Wait for CCR ready        */
 192         aurora_wait_CCR(bp->r[chip]);
 193
 194         /* Reset CD180 chip          */
 195         sbus_writeb(CCR_HARDRESET, &bp->r[chip]->r[CD180_CCR]);
 196         udelay(1);
 197         sti();
 198         id=1000;
 199         while((--id) &&
 200               (sbus_readb(&bp->r[chip]->r[CD180_GSVR])!=0xff))udelay(100);
 201         if(!id) {
 202                 printk(KERN_ERR "aurora%d: Chip %d failed init.\n",
 203                        board_No(bp), chip);
 204                 restore_flags(flags);
 205                 return(-1);
 206         }
 207         cli();
 208         sbus_writeb((board_No(bp)<<5)|((chip+1)<<3),
 209                     &bp->r[chip]->r[CD180_GSVR]); /* Set ID for this chip      */
 210         sbus_writeb(0x80|bp->ACK_MINT,
 211                     &bp->r[chip]->r[CD180_MSMR]); /* Prio for modem intr       */
 212         sbus_writeb(0x80|bp->ACK_TINT,
 213                     &bp->r[chip]->r[CD180_TSMR]); /* Prio for transmitter intr */
 214         sbus_writeb(0x80|bp->ACK_RINT,
 215                     &bp->r[chip]->r[CD180_RSMR]); /* Prio for receiver intr    */
 216         /* Setting up prescaler. We need 4 tick per 1 ms */
 217         sbus_writeb((bp->oscfreq/(1000000/AURORA_TPS)) >> 8,
 218                     &bp->r[chip]->r[CD180_PPRH]);
 219         sbus_writeb((bp->oscfreq/(1000000/AURORA_TPS)) & 0xff,
 220                     &bp->r[chip]->r[CD180_PPRL]);
 221
 222         sbus_writeb(SRCR_AUTOPRI|SRCR_GLOBPRI,
 223                     &bp->r[chip]->r[CD180_SRCR]);
 224
 225         id = sbus_readb(&bp->r[chip]->r[CD180_GFRCR]);
 226         printk(KERN_INFO "aurora%d: Chip %d id %02x: ",
 227                board_No(bp), chip,id);
 228         if(sbus_readb(&bp->r[chip]->r[CD180_SRCR]) & 128) {
 229                 switch (id) {
 230                         case 0x82:printk("CL-CD1864 rev A\n");break;
 231                         case 0x83:printk("CL-CD1865 rev A\n");break;
 232                         case 0x84:printk("CL-CD1865 rev B\n");break;
 233                         case 0x85:printk("CL-CD1865 rev C\n");break;
 234                         default:printk("Unknown.\n");
 235                 };
 236         } else {
 237                 switch (id) {
 238                         case 0x81:printk("CL-CD180 rev B\n");break;
 239                         case 0x82:printk("CL-CD180 rev C\n");break;
 240                         default:printk("Unknown.\n");
 241                 };
 242         }
 243         restore_flags(flags);
 244 #ifdef AURORA_DEBUG
 245         printk("aurora_init_CD180: end\n");
 246 #endif
 247         return 0;
 248 }
 249
 250 static int valid_irq(unsigned char irq)
 251 {
 252 int i;
 253 for(i=0;i<TYPE_1_IRQS;i++)
 254         if (type_1_irq[i]==irq) return 1;
 255 return 0;
 256 }
 257
 258 static irqreturn_t aurora_interrupt(int irq, void * dev_id, struct pt_regs * regs);
 259
 260 /* Main probing routine, also sets irq. */
 261 static int aurora_probe(void)
 262 {
 263         struct sbus_bus *sbus;
 264         struct sbus_dev *sdev;
 265         int grrr;
 266         char buf[30];
 267         int bn = 0;
 268         struct Aurora_board *bp;
 269
 270         for_each_sbus(sbus) {
 271                 for_each_sbusdev(sdev, sbus) {
 272 /*                      printk("Try: %x %s\n",sdev,sdev->prom_name);*/
 273                         if (!strcmp(sdev->prom_name, "sio16")) {
 274 #ifdef AURORA_DEBUG
 275                                 printk(KERN_INFO "aurora: sio16 at %p\n",sdev);
 276 #endif
 277                                 if((sdev->reg_addrs[0].reg_size!=1) &&
 278                                    (sdev->reg_addrs[1].reg_size!=128) &&
 279                                    (sdev->reg_addrs[2].reg_size!=128) &&
 280                                    (sdev->reg_addrs[3].reg_size!=4)) {
 281                                         printk(KERN_ERR "aurora%d: registers' sizes "
 282                                                "do not match.\n", bn);
 283                                         break;
 284                                 }
 285                                 bp = &aurora_board[bn];
 286                                 bp->r0 = (struct aurora_reg1 *)
 287                                         sbus_ioremap(&sdev->resource[0], 0,
 288                                                      sdev->reg_addrs[0].reg_size,
 289                                                      "sio16");
 290                                 if (bp->r0 == NULL) {
 291                                         printk(KERN_ERR "aurora%d: can't map "
 292                                                "reg_addrs[0]\n", bn);
 293                                         break;
 294                                 }
 295 #ifdef AURORA_DEBUG
 296                                 printk("Map reg 0: %p\n", bp->r0);
 297 #endif
 298                                 bp->r[0] = (struct aurora_reg128 *)
 299                                         sbus_ioremap(&sdev->resource[1], 0,
 300                                                      sdev->reg_addrs[1].reg_size,
 301                                                      "sio16");
 302                                 if (bp->r[0] == NULL) {
 303                                         printk(KERN_ERR "aurora%d: can't map "
 304                                                "reg_addrs[1]\n", bn);
 305                                         break;
 306                                 }
 307 #ifdef AURORA_DEBUG
 308                                 printk("Map reg 1: %p\n", bp->r[0]);
 309 #endif
 310                                 bp->r[1] = (struct aurora_reg128 *)
 311                                         sbus_ioremap(&sdev->resource[2], 0,
 312                                                      sdev->reg_addrs[2].reg_size,
 313                                                      "sio16");
 314                                 if (bp->r[1] == NULL) {
 315                                         printk(KERN_ERR "aurora%d: can't map "
 316                                                "reg_addrs[2]\n", bn);
 317                                         break;
 318                                 }
 319 #ifdef AURORA_DEBUG
 320                                 printk("Map reg 2: %p\n", bp->r[1]);
 321 #endif
 322                                 bp->r3 = (struct aurora_reg4 *)
 323                                         sbus_ioremap(&sdev->resource[3], 0,
 324                                                      sdev->reg_addrs[3].reg_size,
 325                                                      "sio16");
 326                                 if (bp->r3 == NULL) {
 327                                         printk(KERN_ERR "aurora%d: can't map "
 328                                                "reg_addrs[3]\n", bn);
 329                                         break;
 330                                 }
 331 #ifdef AURORA_DEBUG
 332                                 printk("Map reg 3: %p\n", bp->r3);
 333 #endif
 334                                 /* Variables setup */
 335                                 bp->flags = 0;
 336 #ifdef AURORA_DEBUG
 337                                 grrr=prom_getint(sdev->prom_node,"intr");
 338                                 printk("intr pri %d\n", grrr);
 339 #endif
 340                                 if ((bp->irq=irqs[bn]) && valid_irq(bp->irq) &&
 341                                     !request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
 342                                         free_irq(bp->irq|0x30, bp);
 343                                 } else
 344                                 if ((bp->irq=prom_getint(sdev->prom_node, "bintr")) && valid_irq(bp->irq) &&
 345                                     !request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
 346                                         free_irq(bp->irq|0x30, bp);
 347                                 } else
 348                                 if ((bp->irq=prom_getint(sdev->prom_node, "intr")) && valid_irq(bp->irq) &&
 349                                     !request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
 350                                         free_irq(bp->irq|0x30, bp);
 351                                 } else
 352                                 for(grrr=0;grrr<TYPE_1_IRQS;grrr++) {
 353                                         if ((bp->irq=type_1_irq[grrr])&&!request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
 354                                                 free_irq(bp->irq|0x30, bp);
 355                                                 break;
 356                                         } else {
 357                                         printk(KERN_ERR "aurora%d: Could not get an irq for this board !!!\n",bn);
 358                                         bp->flags=0xff;
 359                                         }
 360                                 }
 361                                 if(bp->flags==0xff)break;
 362                                 printk(KERN_INFO "aurora%d: irq %d\n",bn,bp->irq&0x0f);
 363                                 buf[0]=0;
 364                                 grrr=prom_getproperty(sdev->prom_node,"dtr_rts",buf,sizeof(buf));
 365                                 if(!strcmp(buf,"swapped")){
 366                                         printk(KERN_INFO "aurora%d: Swapped DTR and RTS\n",bn);
 367                                         bp->DTR=MSVR_RTS;
 368                                         bp->RTS=MSVR_DTR;
 369                                         bp->MSVDTR=CD180_MSVRTS;
 370                                         bp->MSVRTS=CD180_MSVDTR;
 371                                         bp->flags|=AURORA_BOARD_DTR_FLOW_OK;
 372                                         }else{
 373                                         #ifdef AURORA_FORCE_DTR_FLOW
 374                                         printk(KERN_INFO "aurora%d: Forcing swapped DTR-RTS\n",bn);
 375                                         bp->DTR=MSVR_RTS;
 376                                         bp->RTS=MSVR_DTR;
 377                                         bp->MSVDTR=CD180_MSVRTS;
 378                                         bp->MSVRTS=CD180_MSVDTR;
 379                                         bp->flags|=AURORA_BOARD_DTR_FLOW_OK;
 380                                         #else
 381                                         printk(KERN_INFO "aurora%d: Normal DTR and RTS\n",bn);
 382                                         bp->DTR=MSVR_DTR;
 383                                         bp->RTS=MSVR_RTS;
 384                                         bp->MSVDTR=CD180_MSVDTR;
 385                                         bp->MSVRTS=CD180_MSVRTS;
 386                                         #endif
 387                                 }
 388                                 bp->oscfreq=prom_getint(sdev->prom_node,"clk")*100;
 389                                 printk(KERN_INFO "aurora%d: Oscillator: %d Hz\n",bn,bp->oscfreq);
 390                                 grrr=prom_getproperty(sdev->prom_node,"chip",buf,sizeof(buf));
 391                                 printk(KERN_INFO "aurora%d: Chips: %s\n",bn,buf);
 392                                 grrr=prom_getproperty(sdev->prom_node,"manu",buf,sizeof(buf));
 393                                 printk(KERN_INFO "aurora%d: Manufacturer: %s\n",bn,buf);
 394                                 grrr=prom_getproperty(sdev->prom_node,"model",buf,sizeof(buf));
 395                                 printk(KERN_INFO "aurora%d: Model: %s\n",bn,buf);
 396                                 grrr=prom_getproperty(sdev->prom_node,"rev",buf,sizeof(buf));
 397                                 printk(KERN_INFO "aurora%d: Revision: %s\n",bn,buf);
 398                                 grrr=prom_getproperty(sdev->prom_node,"mode",buf,sizeof(buf));
 399                                 printk(KERN_INFO "aurora%d: Mode: %s\n",bn,buf);
 400                                 #ifdef MODULE
 401                                 bp->count=0;
 402                                 #endif
 403                                 bp->flags = AURORA_BOARD_PRESENT;
 404                                 /* hardware ack */
 405                                 bp->ACK_MINT=1;
 406                                 bp->ACK_TINT=2;
 407                                 bp->ACK_RINT=3;
 408                                 bn++;
 409                         }
 410                 }
 411         }
 412         return bn;
 413 }
 414
 415 static void aurora_release_io_range(struct Aurora_board *bp)
 416 {
 417         sbus_iounmap((unsigned long)bp->r0, 1);
 418         sbus_iounmap((unsigned long)bp->r[0], 128);
 419         sbus_iounmap((unsigned long)bp->r[1], 128);
 420         sbus_iounmap((unsigned long)bp->r3, 4);
 421 }
 422
 423 extern inline void aurora_mark_event(struct Aurora_port * port, int event)
 424 {
 425 #ifdef AURORA_DEBUG
 426         printk("aurora_mark_event: start\n");
 427 #endif
 428         set_bit(event, &port->event);
 429         queue_task(&port->tqueue, &tq_aurora);
 430         mark_bh(AURORA_BH);
 431 #ifdef AURORA_DEBUG
 432         printk("aurora_mark_event: end\n");
 433 #endif
 434 }
 435
 436 static __inline__ struct Aurora_port * aurora_get_port(struct Aurora_board const * bp,
 437                                                        int chip,
 438                                                        unsigned char const *what)
 439 {
 440         unsigned char channel;
 441         struct Aurora_port * port;
 442
 443         channel = ((chip << 3) |
 444                    ((sbus_readb(&bp->r[chip]->r[CD180_GSCR]) & GSCR_CHAN) >> GSCR_CHAN_OFF));
 445         port = &aurora_port[board_No(bp) * AURORA_NPORT * AURORA_NCD180 + channel];
 446         if (port->flags & ASYNC_INITIALIZED)
 447                 return port;
 448
 449         printk(KERN_DEBUG "aurora%d: %s interrupt from invalid port %d\n",
 450                board_No(bp), what, channel);
 451         return NULL;
 452 }
 453
 454 static void aurora_receive_exc(struct Aurora_board const * bp, int chip)
 455 {
 456         struct Aurora_port *port;
 457         struct tty_struct *tty;
 458         unsigned char status;
 459         unsigned char ch;
 460
 461         if (!(port = aurora_get_port(bp, chip, "Receive_x")))
 462                 return;
 463
 464         tty = port->tty;
 465         if (tty->flip.count >= TTY_FLIPBUF_SIZE)  {
 466 #ifdef AURORA_INTNORM
 467                 printk("aurora%d: port %d: Working around flip buffer overflow.\n",
 468                        board_No(bp), port_No(port));
 469 #endif
 470                 return;
 471         }
 472
 473 #ifdef AURORA_REPORT_OVERRUN
 474         status = sbus_readb(&bp->r[chip]->r[CD180_RCSR]);
 475         if (status & RCSR_OE)  {
 476                 port->overrun++;
 477 #if 1
 478                 printk("aurora%d: port %d: Overrun. Total %ld overruns.\n",
 479                        board_No(bp), port_No(port), port->overrun);
 480 #endif
 481         }
 482         status &= port->mark_mask;
 483 #else
 484         status = sbus_readb(&bp->r[chip]->r[CD180_RCSR]) & port->mark_mask;
 485 #endif
 486         ch = sbus_readb(&bp->r[chip]->r[CD180_RDR]);
 487         if (!status)
 488                 return;
 489
 490         if (status & RCSR_TOUT)  {
 491 /*              printk("aurora%d: port %d: Receiver timeout. Hardware problems ?\n",
 492                        board_No(bp), port_No(port));*/
 493                 return;
 494
 495         } else if (status & RCSR_BREAK)  {
 496                 printk(KERN_DEBUG "aurora%d: port %d: Handling break...\n",
 497                        board_No(bp), port_No(port));
 498                 *tty->flip.flag_buf_ptr++ = TTY_BREAK;
 499                 if (port->flags & ASYNC_SAK)
 500                         do_SAK(tty);
 501
 502         } else if (status & RCSR_PE)
 503                 *tty->flip.flag_buf_ptr++ = TTY_PARITY;
 504
 505         else if (status & RCSR_FE)
 506                 *tty->flip.flag_buf_ptr++ = TTY_FRAME;
 507
 508         else if (status & RCSR_OE)
 509                 *tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
 510
 511         else
 512                 *tty->flip.flag_buf_ptr++ = 0;
 513
 514         *tty->flip.char_buf_ptr++ = ch;
 515         tty->flip.count++;
 516         queue_task(&tty->flip.tqueue, &tq_timer);
 517 }
 518
 519 static void aurora_receive(struct Aurora_board const * bp, int chip)
 520 {
 521         struct Aurora_port *port;
 522         struct tty_struct *tty;
 523         unsigned char count,cnt;
 524
 525         if (!(port = aurora_get_port(bp, chip, "Receive")))
 526                 return;
 527
 528         tty = port->tty;
 529
 530         count = sbus_readb(&bp->r[chip]->r[CD180_RDCR]);
 531
 532 #ifdef AURORA_REPORT_FIFO
 533         port->hits[count > 8 ? 9 : count]++;
 534 #endif
 535
 536         while (count--)  {
 537                 if (tty->flip.count >= TTY_FLIPBUF_SIZE)  {
 538 #ifdef AURORA_INTNORM
 539                         printk("aurora%d: port %d: Working around flip buffer overflow.\n",
 540                                board_No(bp), port_No(port));
 541 #endif
 542                         break;
 543                 }
 544                 cnt = sbus_readb(&bp->r[chip]->r[CD180_RDR]);
 545                 *tty->flip.char_buf_ptr++ = cnt;
 546                 *tty->flip.flag_buf_ptr++ = 0;
 547                 tty->flip.count++;
 548         }
 549         queue_task(&tty->flip.tqueue, &tq_timer);
 550 }
 551
 552 static void aurora_transmit(struct Aurora_board const * bp, int chip)
 553 {
 554         struct Aurora_port *port;
 555         struct tty_struct *tty;
 556         unsigned char count;
 557
 558         if (!(port = aurora_get_port(bp, chip, "Transmit")))
 559                 return;
 560
 561         tty = port->tty;
 562
 563         if (port->SRER & SRER_TXEMPTY)  {
 564                 /* FIFO drained */
 565                 sbus_writeb(port_No(port) & 7,
 566                             &bp->r[chip]->r[CD180_CAR]);
 567                 udelay(1);
 568                 port->SRER &= ~SRER_TXEMPTY;
 569                 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
 570                 return;
 571         }
 572
 573         if ((port->xmit_cnt <= 0 && !port->break_length)
 574             || tty->stopped || tty->hw_stopped)  {
 575                 sbus_writeb(port_No(port) & 7,
 576                             &bp->r[chip]->r[CD180_CAR]);
 577                 udelay(1);
 578                 port->SRER &= ~SRER_TXRDY;
 579                 sbus_writeb(port->SRER,
 580                             &bp->r[chip]->r[CD180_SRER]);
 581                 return;
 582         }
 583
 584         if (port->break_length)  {
 585                 if (port->break_length > 0)  {
 586                         if (port->COR2 & COR2_ETC)  {
 587                                 sbus_writeb(CD180_C_ESC,
 588                                             &bp->r[chip]->r[CD180_TDR]);
 589                                 sbus_writeb(CD180_C_SBRK,
 590                                             &bp->r[chip]->r[CD180_TDR]);
 591                                 port->COR2 &= ~COR2_ETC;
 592                         }
 593                         count = min(port->break_length, 0xff);
 594                         sbus_writeb(CD180_C_ESC,
 595                                     &bp->r[chip]->r[CD180_TDR]);
 596                         sbus_writeb(CD180_C_DELAY,
 597                                     &bp->r[chip]->r[CD180_TDR]);
 598                         sbus_writeb(count,
 599                                     &bp->r[chip]->r[CD180_TDR]);
 600                         if (!(port->break_length -= count))
 601                                 port->break_length--;
 602                 } else  {
 603                         sbus_writeb(CD180_C_ESC,
 604                                     &bp->r[chip]->r[CD180_TDR]);
 605                         sbus_writeb(CD180_C_EBRK,
 606                                     &bp->r[chip]->r[CD180_TDR]);
 607                         sbus_writeb(port->COR2,
 608                                     &bp->r[chip]->r[CD180_COR2]);
 609                         aurora_wait_CCR(bp->r[chip]);
 610                         sbus_writeb(CCR_CORCHG2,
 611                                     &bp->r[chip]->r[CD180_CCR]);
 612                         port->break_length = 0;
 613                 }
 614                 return;
 615         }
 616
 617         count = CD180_NFIFO;
 618         do {
 619                 u8 byte = port->xmit_buf[port->xmit_tail++];
 620
 621                 sbus_writeb(byte, &bp->r[chip]->r[CD180_TDR]);
 622                 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1);
 623                 if (--port->xmit_cnt <= 0)
 624                         break;
 625         } while (--count > 0);
 626
 627         if (port->xmit_cnt <= 0)  {
 628                 sbus_writeb(port_No(port) & 7,
 629                             &bp->r[chip]->r[CD180_CAR]);
 630                 udelay(1);
 631                 port->SRER &= ~SRER_TXRDY;
 632                 sbus_writeb(port->SRER,
 633                             &bp->r[chip]->r[CD180_SRER]);
 634         }
 635         if (port->xmit_cnt <= port->wakeup_chars)
 636                 aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
 637 }
 638
 639 static void aurora_check_modem(struct Aurora_board const * bp, int chip)
 640 {
 641         struct Aurora_port *port;
 642         struct tty_struct *tty;
 643         unsigned char mcr;
 644
 645         if (!(port = aurora_get_port(bp, chip, "Modem")))
 646                 return;
 647
 648         tty = port->tty;
 649
 650         mcr = sbus_readb(&bp->r[chip]->r[CD180_MCR]);
 651         if (mcr & MCR_CDCHG)  {
 652                 if (sbus_readb(&bp->r[chip]->r[CD180_MSVR]) & MSVR_CD)
 653                         wake_up_interruptible(&port->open_wait);
 654                 else
 655                         schedule_task(&port->tqueue_hangup);
 656         }
 657
 658 /* 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
 659  * Aurora didn't made any boards with CTS or DSR broken...
 660  */
 661 /* #ifdef AURORA_BRAIN_DAMAGED_CTS
 662         if (mcr & MCR_CTSCHG)  {
 663                 if (aurora_in(bp, CD180_MSVR) & MSVR_CTS)  {
 664                         tty->hw_stopped = 0;
 665                         port->SRER |= SRER_TXRDY;
 666                         if (port->xmit_cnt <= port->wakeup_chars)
 667                                 aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
 668                 } else  {
 669                         tty->hw_stopped = 1;
 670                         port->SRER &= ~SRER_TXRDY;
 671                 }
 672                 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
 673         }
 674         if (mcr & MCR_DSRCHG)  {
 675                 if (aurora_in(bp, CD180_MSVR) & MSVR_DSR)  {
 676                         tty->hw_stopped = 0;
 677                         port->SRER |= SRER_TXRDY;
 678                         if (port->xmit_cnt <= port->wakeup_chars)
 679                                 aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
 680                 } else  {
 681                         tty->hw_stopped = 1;
 682                         port->SRER &= ~SRER_TXRDY;
 683                 }
 684                 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
 685         }
 686 #endif AURORA_BRAIN_DAMAGED_CTS */
 687
 688         /* Clear change bits */
 689         sbus_writeb(0, &bp->r[chip]->r[CD180_MCR]);
 690 }
 691
 692 /* The main interrupt processing routine */
 693 static irqreturn_t aurora_interrupt(int irq, void * dev_id, struct pt_regs * regs)
 694 {
 695         unsigned char status;
 696         unsigned char ack,chip/*,chip_id*/;
 697         struct Aurora_board * bp = (struct Aurora_board *) dev_id;
 698         unsigned long loop = 0;
 699
 700 #ifdef AURORA_INT_DEBUG
 701         printk("IRQ%d %d\n",irq,++irqhit);
 702 #ifdef AURORA_FLOODPRO
 703         if (irqhit>=AURORA_FLOODPRO)
 704                 sbus_writeb(8, &bp->r0->r);
 705 #endif
 706 #endif
 707
 708 /* old  bp = IRQ_to_board[irq&0x0f];*/
 709
 710         if (!bp || !(bp->flags & AURORA_BOARD_ACTIVE))
 711                 return IRQ_NONE;
 712
 713 /*      The while() below takes care of this.
 714         status = sbus_readb(&bp->r[0]->r[CD180_SRSR]);
 715 #ifdef AURORA_INT_DEBUG
 716         printk("mumu: %02x\n", status);
 717 #endif
 718         if (!(status&SRSR_ANYINT))
 719                 return IRQ_NONE; * Nobody has anything to say, so exit *
 720 */
 721         while ((loop++ < 48) &&
 722                (status = sbus_readb(&bp->r[0]->r[CD180_SRSR]) & SRSR_ANYINT)){
 723 #ifdef AURORA_INT_DEBUG
 724                 printk("SRSR: %02x\n", status);
 725 #endif
 726                 if (status & SRSR_REXT) {
 727                         ack = sbus_readb(&bp->r3->r[bp->ACK_RINT]);
 728 #ifdef AURORA_INT_DEBUG
 729                         printk("R-ACK %02x\n", ack);
 730 #endif
 731                         if ((ack >> 5) == board_No(bp)) {
 732                                 if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
 733                                         if ((ack&GSVR_ITMASK)==GSVR_IT_RGD) {
 734                                                 aurora_receive(bp,chip);
 735                                                 sbus_writeb(0,
 736                                                          &bp->r[chip]->r[CD180_EOSRR]);
 737                                         } else if ((ack & GSVR_ITMASK) == GSVR_IT_REXC) {
 738                                                 aurora_receive_exc(bp,chip);
 739                                                 sbus_writeb(0,
 740                                                          &bp->r[chip]->r[CD180_EOSRR]);
 741                                         }
 742                                 }
 743                         }
 744                 } else if (status & SRSR_TEXT) {
 745                         ack = sbus_readb(&bp->r3->r[bp->ACK_TINT]);
 746 #ifdef AURORA_INT_DEBUG
 747                         printk("T-ACK %02x\n", ack);
 748 #endif
 749                         if ((ack >> 5) == board_No(bp)) {
 750                                 if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
 751                                         if ((ack&GSVR_ITMASK)==GSVR_IT_TX) {
 752                                                 aurora_transmit(bp,chip);
 753                                                 sbus_writeb(0,
 754                                                          &bp->r[chip]->r[CD180_EOSRR]);
 755                                         }
 756                                 }
 757                         }
 758                 } else if (status & SRSR_MEXT) {
 759                         ack = sbus_readb(&bp->r3->r[bp->ACK_MINT]);
 760 #ifdef AURORA_INT_DEBUG
 761                         printk("M-ACK %02x\n", ack);
 762 #endif
 763                         if ((ack >> 5) == board_No(bp)) {
 764                                 if ((chip = ((ack>>3)&3)-1) < AURORA_NCD180) {
 765                                         if ((ack&GSVR_ITMASK)==GSVR_IT_MDM) {
 766                                                 aurora_check_modem(bp,chip);
 767                                                 sbus_writeb(0,
 768                                                          &bp->r[chip]->r[CD180_EOSRR]);
 769                                         }
 770                                 }
 771                         }
 772                 }
 773         }
 774 /* I guess this faster code can be used with CD1865, using AUROPRI and GLOBPRI. */
 775 #if 0
 776         while ((loop++ < 48)&&(status=bp->r[0]->r[CD180_SRSR]&SRSR_ANYINT)){
 777 #ifdef AURORA_INT_DEBUG
 778                 printk("SRSR: %02x\n",status);
 779 #endif
 780                 ack = sbus_readb(&bp->r3->r[0]);
 781 #ifdef AURORA_INT_DEBUG
 782                 printk("ACK: %02x\n",ack);
 783 #endif
 784                 if ((ack>>5)==board_No(bp)) {
 785                         if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
 786                                 ack&=GSVR_ITMASK;
 787                                 if (ack==GSVR_IT_RGD) {
 788                                         aurora_receive(bp,chip);
 789                                         sbus_writeb(0,
 790                                                     &bp->r[chip]->r[CD180_EOSRR]);
 791                                 } else if (ack==GSVR_IT_REXC) {
 792                                         aurora_receive_exc(bp,chip);
 793                                         sbus_writeb(0,
 794                                                     &bp->r[chip]->r[CD180_EOSRR]);
 795                                 } else if (ack==GSVR_IT_TX) {
 796                                         aurora_transmit(bp,chip);
 797                                         sbus_writeb(0,
 798                                                     &bp->r[chip]->r[CD180_EOSRR]);
 799                                 } else if (ack==GSVR_IT_MDM) {
 800                                         aurora_check_modem(bp,chip);
 801                                         sbus_writeb(0,
 802                                                     &bp->r[chip]->r[CD180_EOSRR]);
 803                                 }
 804                         }
 805                 }
 806         }
 807 #endif
 808
 809 /* This is the old handling routine, used in riscom8 for only one CD180. I keep it here for reference. */
 810 #if 0
 811         for(chip=0;chip<AURORA_NCD180;chip++){
 812                 chip_id=(board_No(bp)<<5)|((chip+1)<<3);
 813                 loop=0;
 814                 while ((loop++ < 1) &&
 815                        ((status = sbus_readb(&bp->r[chip]->r[CD180_SRSR])) &
 816                         (SRSR_TEXT | SRSR_MEXT | SRSR_REXT))) {
 817
 818                         if (status & SRSR_REXT) {
 819                                 ack = sbus_readb(&bp->r3->r[bp->ACK_RINT]);
 820                                 if (ack == (chip_id | GSVR_IT_RGD)) {
 821 #ifdef AURORA_INTMSG
 822                                         printk("RX ACK\n");
 823 #endif
 824                                         aurora_receive(bp,chip);
 825                                 } else if (ack == (chip_id | GSVR_IT_REXC)) {
 826 #ifdef AURORA_INTMSG
 827                                         printk("RXC ACK\n");
 828 #endif
 829                                         aurora_receive_exc(bp,chip);
 830                                 } else {
 831 #ifdef AURORA_INTNORM
 832                                         printk("aurora%d-%d: Bad receive ack 0x%02x.\n",
 833                                                board_No(bp), chip, ack);
 834 #endif
 835                                 }
 836                         } else if (status & SRSR_TEXT) {
 837                                 ack = sbus_readb(&bp->r3->r[bp->ACK_TINT]);
 838                                 if (ack == (chip_id | GSVR_IT_TX)){
 839 #ifdef AURORA_INTMSG
 840                                         printk("TX ACK\n");
 841 #endif
 842                                         aurora_transmit(bp,chip);
 843                                 } else {
 844 #ifdef AURORA_INTNORM
 845                                         printk("aurora%d-%d: Bad transmit ack 0x%02x.\n",
 846                                                board_No(bp), chip, ack);
 847 #endif
 848                                 }
 849                         } else  if (status & SRSR_MEXT)  {
 850                                 ack = sbus_readb(&bp->r3->r[bp->ACK_MINT]);
 851                                 if (ack == (chip_id | GSVR_IT_MDM)){
 852 #ifdef AURORA_INTMSG
 853                                         printk("MDM ACK\n");
 854 #endif
 855                                         aurora_check_modem(bp,chip);
 856                                 } else {
 857 #ifdef AURORA_INTNORM
 858                                         printk("aurora%d-%d: Bad modem ack 0x%02x.\n",
 859                                                board_No(bp), chip, ack);
 860 #endif
 861                                 }
 862                         }
 863                         sbus_writeb(0, &bp->r[chip]->r[CD180_EOSRR]);
 864                 }
 865         }
 866 #endif
 867
 868         return IRQ_HANDLED;
 869 }
 870
 871 #ifdef AURORA_INT_DEBUG
 872 static void aurora_timer (unsigned long ignored);
 873
 874 static struct timer_list aurora_poll_timer =
 875                         TIMER_INITIALIZER(aurora_timer, 0, 0);
 876
 877 static void
 878 aurora_timer (unsigned long ignored)
 879 {
 880         unsigned long flags;
 881         int i;
 882
 883         save_flags(flags); cli();
 884
 885         printk("SRSR: %02x,%02x - ",
 886                sbus_readb(&aurora_board[0].r[0]->r[CD180_SRSR]),
 887                sbus_readb(&aurora_board[0].r[1]->r[CD180_SRSR]));
 888         for (i = 0; i < 4; i++) {
 889                 udelay(1);
 890                 printk("%02x ",
 891                        sbus_readb(&aurora_board[0].r3->r[i]));
 892         }
 893         printk("\n");
 894
 895         aurora_poll_timer.expires = jiffies + 300;
 896         add_timer (&aurora_poll_timer);
 897
 898         restore_flags(flags);
 899 }
 900 #endif
 901
 902 /*
 903  *  Routines for open & close processing.
 904  */
 905
 906 /* Called with disabled interrupts */
 907 static int aurora_setup_board(struct Aurora_board * bp)
 908 {
 909         int error;
 910
 911 #ifdef AURORA_ALLIRQ
 912         int i;
 913         for (i = 0; i < AURORA_ALLIRQ; i++) {
 914                 error = request_irq(allirq[i]|0x30, aurora_interrupt, SA_SHIRQ,
 915                                     "sio16", bp);
 916                 if (error)
 917                         printk(KERN_ERR "IRQ%d request error %d\n",
 918                                allirq[i], error);
 919         }
 920 #else
 921         error = request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ,
 922                             "sio16", bp);
 923         if (error) {
 924                 printk(KERN_ERR "IRQ request error %d\n", error);
 925                 return error;
 926         }
 927 #endif
 928         /* Board reset */
 929         sbus_writeb(0, &bp->r0->r);
 930         udelay(1);
 931         if (bp->flags & AURORA_BOARD_TYPE_2) {
 932                 /* unknown yet */
 933         } else {
 934                 sbus_writeb((AURORA_CFG_ENABLE_IO | AURORA_CFG_ENABLE_IRQ |
 935                              (((bp->irq)&0x0f)>>2)),
 936                             &bp->r0->r);
 937         }
 938         udelay(10000);
 939
 940         if (aurora_init_CD180(bp,0))error=1;error=0;
 941         if (aurora_init_CD180(bp,1))error++;
 942         if (error == AURORA_NCD180) {
 943                 printk(KERN_ERR "Both chips failed initialisation.\n");
 944                 return -EIO;
 945         }
 946
 947 #ifdef AURORA_INT_DEBUG
 948         aurora_poll_timer.expires= jiffies + 1;
 949         add_timer(&aurora_poll_timer);
 950 #endif
 951 #ifdef AURORA_DEBUG
 952         printk("aurora_setup_board: end\n");
 953 #endif
 954         return 0;
 955 }
 956
 957 /* Called with disabled interrupts */
 958 static void aurora_shutdown_board(struct Aurora_board *bp)
 959 {
 960         int i;
 961
 962 #ifdef AURORA_DEBUG
 963         printk("aurora_shutdown_board: start\n");
 964 #endif
 965
 966 #ifdef AURORA_INT_DEBUG
 967         del_timer(&aurora_poll_timer);
 968 #endif
 969
 970 #ifdef AURORA_ALLIRQ
 971         for(i=0;i<AURORA_ALLIRQ;i++){
 972                 free_irq(allirq[i]|0x30, bp);
 973 /*              IRQ_to_board[allirq[i]&0xf] = NULL;*/
 974         }
 975 #else
 976         free_irq(bp->irq|0x30, bp);
 977 /*      IRQ_to_board[bp->irq&0xf] = NULL;*/
 978 #endif
 979         /* Drop all DTR's */
 980         for(i=0;i<16;i++){
 981                 sbus_writeb(i & 7, &bp->r[i>>3]->r[CD180_CAR]);
 982                 udelay(1);
 983                 sbus_writeb(0, &bp->r[i>>3]->r[CD180_MSVR]);
 984                 udelay(1);
 985         }
 986         /* Board shutdown */
 987         sbus_writeb(0, &bp->r0->r);
 988
 989 #ifdef AURORA_DEBUG
 990         printk("aurora_shutdown_board: end\n");
 991 #endif
 992 }
 993
 994 /* Setting up port characteristics.
 995  * Must be called with disabled interrupts
 996  */
 997 static void aurora_change_speed(struct Aurora_board *bp, struct Aurora_port *port)
 998 {
 999         struct tty_struct *tty;
1000         unsigned long baud;
1001         long tmp;
1002         unsigned char cor1 = 0, cor3 = 0;
1003         unsigned char mcor1 = 0, mcor2 = 0,chip;
1004
1005 #ifdef AURORA_DEBUG
1006         printk("aurora_change_speed: start\n");
1007 #endif
1008         if (!(tty = port->tty) || !tty->termios)
1009                 return;
1010
1011         chip = AURORA_CD180(port_No(port));
1012
1013         port->SRER  = 0;
1014         port->COR2 = 0;
1015         port->MSVR = MSVR_RTS|MSVR_DTR;
1016
1017         baud = tty_get_baud_rate(tty);
1018
1019         /* Select port on the board */
1020         sbus_writeb(port_No(port) & 7,
1021                     &bp->r[chip]->r[CD180_CAR]);
1022         udelay(1);
1023
1024         if (!baud)  {
1025                 /* Drop DTR & exit */
1026                 port->MSVR &= ~(bp->DTR|bp->RTS);
1027                 sbus_writeb(port->MSVR,
1028                             &bp->r[chip]->r[CD180_MSVR]);
1029                 return;
1030         } else  {
1031                 /* Set DTR on */
1032                 port->MSVR |= bp->DTR;
1033                 sbus_writeb(port->MSVR,
1034                             &bp->r[chip]->r[CD180_MSVR]);
1035         }
1036
1037         /* Now we must calculate some speed dependent things. */
1038
1039         /* Set baud rate for port. */
1040         tmp = (((bp->oscfreq + baud/2) / baud +
1041                 CD180_TPC/2) / CD180_TPC);
1042
1043 /*      tmp = (bp->oscfreq/7)/baud;
1044         if((tmp%10)>4)tmp=tmp/10+1;else tmp=tmp/10;*/
1045 /*      printk("Prescaler period: %d\n",tmp);*/
1046
1047         sbus_writeb((tmp >> 8) & 0xff,
1048                     &bp->r[chip]->r[CD180_RBPRH]);
1049         sbus_writeb((tmp >> 8) & 0xff,
1050                     &bp->r[chip]->r[CD180_TBPRH]);
1051         sbus_writeb(tmp & 0xff, &bp->r[chip]->r[CD180_RBPRL]);
1052         sbus_writeb(tmp & 0xff, &bp->r[chip]->r[CD180_TBPRL]);
1053
1054         baud = (baud + 5) / 10;   /* Estimated CPS */
1055
1056         /* Two timer ticks seems enough to wakeup something like SLIP driver */
1057         tmp = ((baud + HZ/2) / HZ) * 2 - CD180_NFIFO;
1058         port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ?
1059                                               SERIAL_XMIT_SIZE - 1 : tmp);
1060
1061         /* Receiver timeout will be transmission time for 1.5 chars */
1062         tmp = (AURORA_TPS + AURORA_TPS/2 + baud/2) / baud;
1063         tmp = (tmp > 0xff) ? 0xff : tmp;
1064         sbus_writeb(tmp, &bp->r[chip]->r[CD180_RTPR]);
1065
1066         switch (C_CSIZE(tty))  {
1067          case CS5:
1068                 cor1 |= COR1_5BITS;
1069                 break;
1070          case CS6:
1071                 cor1 |= COR1_6BITS;
1072                 break;
1073          case CS7:
1074                 cor1 |= COR1_7BITS;
1075                 break;
1076          case CS8:
1077                 cor1 |= COR1_8BITS;
1078                 break;
1079         }
1080
1081         if (C_CSTOPB(tty))
1082                 cor1 |= COR1_2SB;
1083
1084         cor1 |= COR1_IGNORE;
1085         if (C_PARENB(tty))  {
1086                 cor1 |= COR1_NORMPAR;
1087                 if (C_PARODD(tty))
1088                         cor1 |= COR1_ODDP;
1089                 if (I_INPCK(tty))
1090                         cor1 &= ~COR1_IGNORE;
1091         }
1092         /* Set marking of some errors */
1093         port->mark_mask = RCSR_OE | RCSR_TOUT;
1094         if (I_INPCK(tty))
1095                 port->mark_mask |= RCSR_FE | RCSR_PE;
1096         if (I_BRKINT(tty) || I_PARMRK(tty))
1097                 port->mark_mask |= RCSR_BREAK;
1098         if (I_IGNPAR(tty))
1099                 port->mark_mask &= ~(RCSR_FE | RCSR_PE);
1100         if (I_IGNBRK(tty))  {
1101                 port->mark_mask &= ~RCSR_BREAK;
1102                 if (I_IGNPAR(tty))
1103                         /* Real raw mode. Ignore all */
1104                         port->mark_mask &= ~RCSR_OE;
1105         }
1106         /* Enable Hardware Flow Control */
1107         if (C_CRTSCTS(tty))  {
1108 /*#ifdef AURORA_BRAIN_DAMAGED_CTS
1109                 port->SRER |= SRER_DSR | SRER_CTS;
1110                 mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD;
1111                 mcor2 |= MCOR2_DSROD | MCOR2_CTSOD;
1112                 tty->hw_stopped = !(aurora_in(bp, CD180_MSVR) & (MSVR_CTS|MSVR_DSR));
1113 #else*/
1114                 port->COR2 |= COR2_CTSAE;
1115 /*#endif*/
1116                 if (bp->flags&AURORA_BOARD_DTR_FLOW_OK) {
1117                         mcor1 |= AURORA_RXTH;
1118                 }
1119         }
1120         /* Enable Software Flow Control. FIXME: I'm not sure about this */
1121         /* Some people reported that it works, but I still doubt */
1122         if (I_IXON(tty))  {
1123                 port->COR2 |= COR2_TXIBE;
1124                 cor3 |= (COR3_FCT | COR3_SCDE);
1125                 if (I_IXANY(tty))
1126                         port->COR2 |= COR2_IXM;
1127                 sbus_writeb(START_CHAR(tty),
1128                             &bp->r[chip]->r[CD180_SCHR1]);
1129                 sbus_writeb(STOP_CHAR(tty),
1130                             &bp->r[chip]->r[CD180_SCHR2]);
1131                 sbus_writeb(START_CHAR(tty),
1132                             &bp->r[chip]->r[CD180_SCHR3]);
1133                 sbus_writeb(STOP_CHAR(tty),
1134                             &bp->r[chip]->r[CD180_SCHR4]);
1135         }
1136         if (!C_CLOCAL(tty))  {
1137                 /* Enable CD check */
1138                 port->SRER |= SRER_CD;
1139                 mcor1 |= MCOR1_CDZD;
1140                 mcor2 |= MCOR2_CDOD;
1141         }
1142
1143         if (C_CREAD(tty))
1144                 /* Enable receiver */
1145                 port->SRER |= SRER_RXD;
1146
1147         /* Set input FIFO size (1-8 bytes) */
1148         cor3 |= AURORA_RXFIFO;
1149         /* Setting up CD180 channel registers */
1150         sbus_writeb(cor1, &bp->r[chip]->r[CD180_COR1]);
1151         sbus_writeb(port->COR2, &bp->r[chip]->r[CD180_COR2]);
1152         sbus_writeb(cor3, &bp->r[chip]->r[CD180_COR3]);
1153         /* Make CD180 know about registers change */
1154         aurora_wait_CCR(bp->r[chip]);
1155         sbus_writeb(CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3,
1156                     &bp->r[chip]->r[CD180_CCR]);
1157         /* Setting up modem option registers */
1158         sbus_writeb(mcor1, &bp->r[chip]->r[CD180_MCOR1]);
1159         sbus_writeb(mcor2, &bp->r[chip]->r[CD180_MCOR2]);
1160         /* Enable CD180 transmitter & receiver */
1161         aurora_wait_CCR(bp->r[chip]);
1162         sbus_writeb(CCR_TXEN | CCR_RXEN, &bp->r[chip]->r[CD180_CCR]);
1163         /* Enable interrupts */
1164         sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1165         /* And finally set RTS on */
1166         sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1167 #ifdef AURORA_DEBUG
1168         printk("aurora_change_speed: end\n");
1169 #endif
1170 }
1171
1172 /* Must be called with interrupts enabled */
1173 static int aurora_setup_port(struct Aurora_board *bp, struct Aurora_port *port)
1174 {
1175         unsigned long flags;
1176
1177 #ifdef AURORA_DEBUG
1178         printk("aurora_setup_port: start %d\n",port_No(port));
1179 #endif
1180         if (port->flags & ASYNC_INITIALIZED)
1181                 return 0;
1182
1183         if (!port->xmit_buf) {
1184                 /* We may sleep in get_zeroed_page() */
1185                 unsigned long tmp;
1186
1187                 if (!(tmp = get_zeroed_page(GFP_KERNEL)))
1188                         return -ENOMEM;
1189
1190                 if (port->xmit_buf) {
1191                         free_page(tmp);
1192                         return -ERESTARTSYS;
1193                 }
1194                 port->xmit_buf = (unsigned char *) tmp;
1195         }
1196
1197         save_flags(flags); cli();
1198
1199         if (port->tty)
1200                 clear_bit(TTY_IO_ERROR, &port->tty->flags);
1201
1202 #ifdef MODULE
1203         if ((port->count == 1) && ((++bp->count) == 1))
1204                         bp->flags |= AURORA_BOARD_ACTIVE;
1205 #endif
1206
1207         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1208         aurora_change_speed(bp, port);
1209         port->flags |= ASYNC_INITIALIZED;
1210
1211         restore_flags(flags);
1212 #ifdef AURORA_DEBUG
1213         printk("aurora_setup_port: end\n");
1214 #endif
1215         return 0;
1216 }
1217
1218 /* Must be called with interrupts disabled */
1219 static void aurora_shutdown_port(struct Aurora_board *bp, struct Aurora_port *port)
1220 {
1221         struct tty_struct *tty;
1222         unsigned char chip;
1223
1224 #ifdef AURORA_DEBUG
1225         printk("aurora_shutdown_port: start\n");
1226 #endif
1227         if (!(port->flags & ASYNC_INITIALIZED))
1228                 return;
1229
1230         chip = AURORA_CD180(port_No(port));
1231
1232 #ifdef AURORA_REPORT_OVERRUN
1233         printk("aurora%d: port %d: Total %ld overruns were detected.\n",
1234                board_No(bp), port_No(port), port->overrun);
1235 #endif
1236 #ifdef AURORA_REPORT_FIFO
1237         {
1238                 int i;
1239
1240                 printk("aurora%d: port %d: FIFO hits [ ",
1241                        board_No(bp), port_No(port));
1242                 for (i = 0; i < 10; i++)  {
1243                         printk("%ld ", port->hits[i]);
1244                 }
1245                 printk("].\n");
1246         }
1247 #endif
1248         if (port->xmit_buf)  {
1249                 free_page((unsigned long) port->xmit_buf);
1250                 port->xmit_buf = NULL;
1251         }
1252
1253         if (!(tty = port->tty) || C_HUPCL(tty))  {
1254                 /* Drop DTR */
1255                 port->MSVR &= ~(bp->DTR|bp->RTS);
1256                 sbus_writeb(port->MSVR,
1257                             &bp->r[chip]->r[CD180_MSVR]);
1258         }
1259
1260         /* Select port */
1261         sbus_writeb(port_No(port) & 7,
1262                     &bp->r[chip]->r[CD180_CAR]);
1263         udelay(1);
1264
1265         /* Reset port */
1266         aurora_wait_CCR(bp->r[chip]);
1267         sbus_writeb(CCR_SOFTRESET, &bp->r[chip]->r[CD180_CCR]);
1268
1269         /* Disable all interrupts from this port */
1270         port->SRER = 0;
1271         sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1272
1273         if (tty)
1274                 set_bit(TTY_IO_ERROR, &tty->flags);
1275         port->flags &= ~ASYNC_INITIALIZED;
1276
1277 #ifdef MODULE
1278         if (--bp->count < 0)  {
1279                 printk(KERN_DEBUG "aurora%d: aurora_shutdown_port: "
1280                        "bad board count: %d\n",
1281                        board_No(bp), bp->count);
1282                 bp->count = 0;
1283         }
1284
1285         if (!bp->count)
1286                 bp->flags &= ~AURORA_BOARD_ACTIVE;
1287 #endif
1288
1289 #ifdef AURORA_DEBUG
1290         printk("aurora_shutdown_port: end\n");
1291 #endif
1292 }
1293
1294
1295 static int block_til_ready(struct tty_struct *tty, struct file * filp,
1296                            struct Aurora_port *port)
1297 {
1298         DECLARE_WAITQUEUE(wait, current);
1299         struct Aurora_board *bp = port_Board(port);
1300         int    retval;
1301         int    do_clocal = 0;
1302         int    CD;
1303         unsigned char chip;
1304
1305 #ifdef AURORA_DEBUG
1306         printk("block_til_ready: start\n");
1307 #endif
1308         chip = AURORA_CD180(port_No(port));
1309
1310         /* If the device is in the middle of being closed, then block
1311          * until it's done, and then try again.
1312          */
1313         if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
1314                 interruptible_sleep_on(&port->close_wait);
1315                 if (port->flags & ASYNC_HUP_NOTIFY)
1316                         return -EAGAIN;
1317                 else
1318                         return -ERESTARTSYS;
1319         }
1320
1321         /* If non-blocking mode is set, or the port is not enabled,
1322          * then make the check up front and then exit.
1323          */
1324         if ((filp->f_flags & O_NONBLOCK) ||
1325             (tty->flags & (1 << TTY_IO_ERROR))) {
1326                 port->flags |= ASYNC_NORMAL_ACTIVE;
1327                 return 0;
1328         }
1329
1330         if (C_CLOCAL(tty))
1331                 do_clocal = 1;
1332
1333         /* Block waiting for the carrier detect and the line to become
1334          * free (i.e., not in use by the callout).  While we are in
1335          * this loop, info->count is dropped by one, so that
1336          * rs_close() knows when to free things.  We restore it upon
1337          * exit, either normal or abnormal.
1338          */
1339         retval = 0;
1340         add_wait_queue(&port->open_wait, &wait);
1341         cli();
1342         if (!tty_hung_up_p(filp))
1343                 port->count--;
1344         sti();
1345         port->blocked_open++;
1346         while (1) {
1347                 cli();
1348                 sbus_writeb(port_No(port) & 7,
1349                             &bp->r[chip]->r[CD180_CAR]);
1350                 udelay(1);
1351                 CD = sbus_readb(&bp->r[chip]->r[CD180_MSVR]) & MSVR_CD;
1352                 port->MSVR=bp->RTS;
1353
1354                 /* auto drops DTR */
1355                 sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1356                 sti();
1357                 set_current_state(TASK_INTERRUPTIBLE);
1358                 if (tty_hung_up_p(filp) ||
1359                     !(port->flags & ASYNC_INITIALIZED)) {
1360                         if (port->flags & ASYNC_HUP_NOTIFY)
1361                                 retval = -EAGAIN;
1362                         else
1363                                 retval = -ERESTARTSYS;
1364                         break;
1365                 }
1366                 if (!(port->flags & ASYNC_CLOSING) &&
1367                     (do_clocal || CD))
1368                         break;
1369                 if (signal_pending(current)) {
1370                         retval = -ERESTARTSYS;
1371                         break;
1372                 }
1373                 schedule();
1374         }
1375         current->state = TASK_RUNNING;
1376         remove_wait_queue(&port->open_wait, &wait);
1377         if (!tty_hung_up_p(filp))
1378                 port->count++;
1379         port->blocked_open--;
1380         if (retval)
1381                 return retval;
1382
1383         port->flags |= ASYNC_NORMAL_ACTIVE;
1384 #ifdef AURORA_DEBUG
1385         printk("block_til_ready: end\n");
1386 #endif
1387         return 0;
1388 }
1389
1390 static int aurora_open(struct tty_struct * tty, struct file * filp)
1391 {
1392         int board;
1393         int error;
1394         struct Aurora_port * port;
1395         struct Aurora_board * bp;
1396         unsigned long flags;
1397
1398 #ifdef AURORA_DEBUG
1399         printk("aurora_open: start\n");
1400 #endif
1401
1402         board = AURORA_BOARD(tty->index);
1403         if (board > AURORA_NBOARD ||
1404             !(aurora_board[board].flags & AURORA_BOARD_PRESENT)) {
1405 #ifdef AURORA_DEBUG
1406                 printk("aurora_open: error board %d present %d\n",
1407                        board, aurora_board[board].flags & AURORA_BOARD_PRESENT);
1408 #endif
1409                 return -ENODEV;
1410         }
1411
1412         bp = &aurora_board[board];
1413         port = aurora_port + board * AURORA_NPORT * AURORA_NCD180 + AURORA_PORT(tty->index);
1414         if ((aurora_paranoia_check(port, tty->name, "aurora_open")) {
1415 #ifdef AURORA_DEBUG
1416                 printk("aurora_open: error paranoia check\n");
1417 #endif
1418                 return -ENODEV;
1419         }
1420
1421         port->count++;
1422         tty->driver_data = port;
1423         port->tty = tty;
1424
1425         if ((error = aurora_setup_port(bp, port))) {
1426 #ifdef AURORA_DEBUG
1427                 printk("aurora_open: error aurora_setup_port ret %d\n",error);
1428 #endif
1429                 return error;
1430         }
1431
1432         if ((error = block_til_ready(tty, filp, port))) {
1433 #ifdef AURORA_DEBUG
1434                 printk("aurora_open: error block_til_ready ret %d\n",error);
1435 #endif
1436                 return error;
1437         }
1438
1439 #ifdef AURORA_DEBUG
1440         printk("aurora_open: end\n");
1441 #endif
1442         return 0;
1443 }
1444
1445 static void aurora_close(struct tty_struct * tty, struct file * filp)
1446 {
1447         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1448         struct Aurora_board *bp;
1449         unsigned long flags;
1450         unsigned long timeout;
1451         unsigned char chip;
1452
1453 #ifdef AURORA_DEBUG
1454         printk("aurora_close: start\n");
1455 #endif
1456
1457         if (!port || (aurora_paranoia_check(port, tty->name, "close"))
1458                 return;
1459
1460         chip = AURORA_CD180(port_No(port));
1461
1462         save_flags(flags); cli();
1463         if (tty_hung_up_p(filp))  {
1464                 restore_flags(flags);
1465                 return;
1466         }
1467
1468         bp = port_Board(port);
1469         if ((tty->count == 1) && (port->count != 1))  {
1470                 printk(KERN_DEBUG "aurora%d: aurora_close: bad port count; "
1471                        "tty->count is 1, port count is %d\n",
1472                        board_No(bp), port->count);
1473                 port->count = 1;
1474         }
1475         if (--port->count < 0)  {
1476                 printk(KERN_DEBUG "aurora%d: aurora_close: bad port "
1477                        "count for tty%d: %d\n",
1478                        board_No(bp), port_No(port), port->count);
1479                 port->count = 0;
1480         }
1481         if (port->count)  {
1482                 restore_flags(flags);
1483                 return;
1484         }
1485         port->flags |= ASYNC_CLOSING;
1486
1487         /* Now we wait for the transmit buffer to clear; and we notify
1488          * the line discipline to only process XON/XOFF characters.
1489          */
1490         tty->closing = 1;
1491         if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE){
1492 #ifdef AURORA_DEBUG
1493                 printk("aurora_close: waiting to flush...\n");
1494 #endif
1495                 tty_wait_until_sent(tty, port->closing_wait);
1496         }
1497
1498         /* At this point we stop accepting input.  To do this, we
1499          * disable the receive line status interrupts, and tell the
1500          * interrupt driver to stop checking the data ready bit in the
1501          * line status register.
1502          */
1503         port->SRER &= ~SRER_RXD;
1504         if (port->flags & ASYNC_INITIALIZED) {
1505                 port->SRER &= ~SRER_TXRDY;
1506                 port->SRER |= SRER_TXEMPTY;
1507                 sbus_writeb(port_No(port) & 7,
1508                             &bp->r[chip]->r[CD180_CAR]);
1509                 udelay(1);
1510                 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1511                 /*
1512                  * Before we drop DTR, make sure the UART transmitter
1513                  * has completely drained; this is especially
1514                  * important if there is a transmit FIFO!
1515                  */
1516                 timeout = jiffies+HZ;
1517                 while(port->SRER & SRER_TXEMPTY)  {
1518                         current->state = TASK_INTERRUPTIBLE;
1519                         schedule_timeout(port->timeout);
1520                         if (time_after(jiffies, timeout))
1521                                 break;
1522                 }
1523         }
1524 #ifdef AURORA_DEBUG
1525         printk("aurora_close: shutdown_port\n");
1526 #endif
1527         aurora_shutdown_port(bp, port);
1528         if (tty->driver->flush_buffer)
1529                 tty->driver->flush_buffer(tty);
1530         tty_ldisc_flush(tty);
1531         tty->closing = 0;
1532         port->event = 0;
1533         port->tty = 0;
1534         if (port->blocked_open) {
1535                 if (port->close_delay) {
1536                         current->state = TASK_INTERRUPTIBLE;
1537                         schedule_timeout(port->close_delay);
1538                 }
1539                 wake_up_interruptible(&port->open_wait);
1540         }
1541         port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1542         wake_up_interruptible(&port->close_wait);
1543         restore_flags(flags);
1544 #ifdef AURORA_DEBUG
1545         printk("aurora_close: end\n");
1546 #endif
1547 }
1548
1549 static int aurora_write(struct tty_struct * tty,
1550                         const unsigned char *buf, int count)
1551 {
1552         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1553         struct Aurora_board *bp;
1554         int c, total = 0;
1555         unsigned long flags;
1556         unsigned char chip;
1557
1558 #ifdef AURORA_DEBUG
1559         printk("aurora_write: start %d\n",count);
1560 #endif
1561         if ((aurora_paranoia_check(port, tty->name, "aurora_write"))
1562                 return 0;
1563
1564         chip = AURORA_CD180(port_No(port));
1565
1566         bp = port_Board(port);
1567
1568         if (!tty || !port->xmit_buf || !tmp_buf)
1569                 return 0;
1570
1571         save_flags(flags);
1572         while (1) {
1573                 cli();
1574                 c = min(count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
1575                                    SERIAL_XMIT_SIZE - port->xmit_head));
1576                 if (c <= 0) {
1577                         restore_flags(flags);
1578                         break;
1579                 }
1580                 memcpy(port->xmit_buf + port->xmit_head, buf, c);
1581                 port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
1582                 port->xmit_cnt += c;
1583                 restore_flags(flags);
1584
1585                 buf += c;
1586                 count -= c;
1587                 total += c;
1588         }
1589
1590         cli();
1591         if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped &&
1592             !(port->SRER & SRER_TXRDY)) {
1593                 port->SRER |= SRER_TXRDY;
1594                 sbus_writeb(port_No(port) & 7,
1595                             &bp->r[chip]->r[CD180_CAR]);
1596                 udelay(1);
1597                 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1598         }
1599         restore_flags(flags);
1600 #ifdef AURORA_DEBUG
1601         printk("aurora_write: end %d\n",total);
1602 #endif
1603         return total;
1604 }
1605
1606 static void aurora_put_char(struct tty_struct * tty, unsigned char ch)
1607 {
1608         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1609         unsigned long flags;
1610
1611 #ifdef AURORA_DEBUG
1612         printk("aurora_put_char: start %c\n",ch);
1613 #endif
1614         if ((aurora_paranoia_check(port, tty->name, "aurora_put_char"))
1615                 return;
1616
1617         if (!tty || !port->xmit_buf)
1618                 return;
1619
1620         save_flags(flags); cli();
1621
1622         if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
1623                 restore_flags(flags);
1624                 return;
1625         }
1626
1627         port->xmit_buf[port->xmit_head++] = ch;
1628         port->xmit_head &= SERIAL_XMIT_SIZE - 1;
1629         port->xmit_cnt++;
1630         restore_flags(flags);
1631 #ifdef AURORA_DEBUG
1632         printk("aurora_put_char: end\n");
1633 #endif
1634 }
1635
1636 static void aurora_flush_chars(struct tty_struct * tty)
1637 {
1638         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1639         unsigned long flags;
1640         unsigned char chip;
1641
1642 /*#ifdef AURORA_DEBUG
1643         printk("aurora_flush_chars: start\n");
1644 #endif*/
1645         if ((aurora_paranoia_check(port, tty->name, "aurora_flush_chars"))
1646                 return;
1647
1648         chip = AURORA_CD180(port_No(port));
1649
1650         if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1651             !port->xmit_buf)
1652                 return;
1653
1654         save_flags(flags); cli();
1655         port->SRER |= SRER_TXRDY;
1656         sbus_writeb(port_No(port) & 7,
1657                     &port_Board(port)->r[chip]->r[CD180_CAR]);
1658         udelay(1);
1659         sbus_writeb(port->SRER,
1660                     &port_Board(port)->r[chip]->r[CD180_SRER]);
1661         restore_flags(flags);
1662 /*#ifdef AURORA_DEBUG
1663         printk("aurora_flush_chars: end\n");
1664 #endif*/
1665 }
1666
1667 static int aurora_write_room(struct tty_struct * tty)
1668 {
1669         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1670         int     ret;
1671
1672 #ifdef AURORA_DEBUG
1673         printk("aurora_write_room: start\n");
1674 #endif
1675         if ((aurora_paranoia_check(port, tty->name, "aurora_write_room"))
1676                 return 0;
1677
1678         ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1679         if (ret < 0)
1680                 ret = 0;
1681 #ifdef AURORA_DEBUG
1682         printk("aurora_write_room: end\n");
1683 #endif
1684         return ret;
1685 }
1686
1687 static int aurora_chars_in_buffer(struct tty_struct *tty)
1688 {
1689         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1690
1691         if ((aurora_paranoia_check(port, tty->name, "aurora_chars_in_buffer"))
1692                 return 0;
1693
1694         return port->xmit_cnt;
1695 }
1696
1697 static void aurora_flush_buffer(struct tty_struct *tty)
1698 {
1699         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1700         unsigned long flags;
1701
1702 #ifdef AURORA_DEBUG
1703         printk("aurora_flush_buffer: start\n");
1704 #endif
1705         if ((aurora_paranoia_check(port, tty->name, "aurora_flush_buffer"))
1706                 return;
1707
1708         save_flags(flags); cli();
1709         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1710         restore_flags(flags);
1711
1712         tty_wakeup(tty);
1713 #ifdef AURORA_DEBUG
1714         printk("aurora_flush_buffer: end\n");
1715 #endif
1716 }
1717
1718 static int aurora_tiocmget(struct tty_struct *tty, struct file *file)
1719 {
1720         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1721         struct Aurora_board * bp;
1722         unsigned char status,chip;
1723         unsigned int result;
1724         unsigned long flags;
1725
1726 #ifdef AURORA_DEBUG
1727         printk("aurora_get_modem_info: start\n");
1728 #endif
1729         if ((aurora_paranoia_check(port, tty->name, __FUNCTION__))
1730                 return -ENODEV;
1731
1732         chip = AURORA_CD180(port_No(port));
1733
1734         bp = port_Board(port);
1735
1736         save_flags(flags); cli();
1737
1738         sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1739         udelay(1);
1740
1741         status = sbus_readb(&bp->r[chip]->r[CD180_MSVR]);
1742         result = 0/*bp->r[chip]->r[AURORA_RI] & (1u << port_No(port)) ? 0 : TIOCM_RNG*/;
1743
1744         restore_flags(flags);
1745
1746         result |= ((status & bp->RTS) ? TIOCM_RTS : 0)
1747                 | ((status & bp->DTR) ? TIOCM_DTR : 0)
1748                 | ((status & MSVR_CD)  ? TIOCM_CAR : 0)
1749                 | ((status & MSVR_DSR) ? TIOCM_DSR : 0)
1750                 | ((status & MSVR_CTS) ? TIOCM_CTS : 0);
1751
1752 #ifdef AURORA_DEBUG
1753         printk("aurora_get_modem_info: end\n");
1754 #endif
1755         return result;
1756 }
1757
1758 static int aurora_tiocmset(struct tty_struct *tty, struct file *file,
1759                            unsigned int set, unsigned int clear)
1760 {
1761         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1762         unsigned int arg;
1763         unsigned long flags;
1764         struct Aurora_board *bp = port_Board(port);
1765         unsigned char chip;
1766
1767 #ifdef AURORA_DEBUG
1768         printk("aurora_set_modem_info: start\n");
1769 #endif
1770         if ((aurora_paranoia_check(port, tty->name, __FUNCTION__))
1771                 return -ENODEV;
1772
1773         chip = AURORA_CD180(port_No(port));
1774
1775         save_flags(flags); cli();
1776         if (set & TIOCM_RTS)
1777                 port->MSVR |= bp->RTS;
1778         if (set & TIOCM_DTR)
1779                 port->MSVR |= bp->DTR;
1780         if (clear & TIOCM_RTS)
1781                 port->MSVR &= ~bp->RTS;
1782         if (clear & TIOCM_DTR)
1783                 port->MSVR &= ~bp->DTR;
1784
1785         sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1786         udelay(1);
1787
1788         sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1789
1790         restore_flags(flags);
1791 #ifdef AURORA_DEBUG
1792         printk("aurora_set_modem_info: end\n");
1793 #endif
1794         return 0;
1795 }
1796
1797 static void aurora_send_break(struct Aurora_port * port, unsigned long length)
1798 {
1799         struct Aurora_board *bp = port_Board(port);
1800         unsigned long flags;
1801         unsigned char chip;
1802
1803 #ifdef AURORA_DEBUG
1804         printk("aurora_send_break: start\n");
1805 #endif
1806         chip = AURORA_CD180(port_No(port));
1807
1808         save_flags(flags); cli();
1809
1810         port->break_length = AURORA_TPS / HZ * length;
1811         port->COR2 |= COR2_ETC;
1812         port->SRER  |= SRER_TXRDY;
1813         sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1814         udelay(1);
1815
1816         sbus_writeb(port->COR2, &bp->r[chip]->r[CD180_COR2]);
1817         sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1818         aurora_wait_CCR(bp->r[chip]);
1819
1820         sbus_writeb(CCR_CORCHG2, &bp->r[chip]->r[CD180_CCR]);
1821         aurora_wait_CCR(bp->r[chip]);
1822
1823         restore_flags(flags);
1824 #ifdef AURORA_DEBUG
1825         printk("aurora_send_break: end\n");
1826 #endif
1827 }
1828
1829 static int aurora_set_serial_info(struct Aurora_port * port,
1830                                   struct serial_struct * newinfo)
1831 {
1832         struct serial_struct tmp;
1833         struct Aurora_board *bp = port_Board(port);
1834         int change_speed;
1835         unsigned long flags;
1836
1837 #ifdef AURORA_DEBUG
1838         printk("aurora_set_serial_info: start\n");
1839 #endif
1840         if (copy_from_user(&tmp, newinfo, sizeof(tmp)))
1841                 return -EFAULT;
1842 #if 0
1843         if ((tmp.irq != bp->irq) ||
1844             (tmp.port != bp->base) ||
1845             (tmp.type != PORT_CIRRUS) ||
1846             (tmp.baud_base != (bp->oscfreq + CD180_TPC/2) / CD180_TPC) ||
1847             (tmp.custom_divisor != 0) ||
1848             (tmp.xmit_fifo_size != CD180_NFIFO) ||
1849             (tmp.flags & ~AURORA_LEGAL_FLAGS))
1850                 return -EINVAL;
1851 #endif
1852
1853         change_speed = ((port->flags & ASYNC_SPD_MASK) !=
1854                         (tmp.flags & ASYNC_SPD_MASK));
1855
1856         if (!capable(CAP_SYS_ADMIN)) {
1857                 if ((tmp.close_delay != port->close_delay) ||
1858                     (tmp.closing_wait != port->closing_wait) ||
1859                     ((tmp.flags & ~ASYNC_USR_MASK) !=
1860                      (port->flags & ~ASYNC_USR_MASK)))
1861                         return -EPERM;
1862                 port->flags = ((port->flags & ~ASYNC_USR_MASK) |
1863                                (tmp.flags & ASYNC_USR_MASK));
1864         } else  {
1865                 port->flags = ((port->flags & ~ASYNC_FLAGS) |
1866                                (tmp.flags & ASYNC_FLAGS));
1867                 port->close_delay = tmp.close_delay;
1868                 port->closing_wait = tmp.closing_wait;
1869         }
1870         if (change_speed)  {
1871                 save_flags(flags); cli();
1872                 aurora_change_speed(bp, port);
1873                 restore_flags(flags);
1874         }
1875 #ifdef AURORA_DEBUG
1876         printk("aurora_set_serial_info: end\n");
1877 #endif
1878         return 0;
1879 }
1880
1881 extern int aurora_get_serial_info(struct Aurora_port * port,
1882                                   struct serial_struct * retinfo)
1883 {
1884         struct serial_struct tmp;
1885         struct Aurora_board *bp = port_Board(port);
1886
1887 #ifdef AURORA_DEBUG
1888         printk("aurora_get_serial_info: start\n");
1889 #endif
1890         if (!access_ok(VERIFY_WRITE, (void *) retinfo, sizeof(tmp)))
1891                 return -EFAULT;
1892
1893         memset(&tmp, 0, sizeof(tmp));
1894         tmp.type = PORT_CIRRUS;
1895         tmp.line = port - aurora_port;
1896         tmp.port = 0;
1897         tmp.irq  = bp->irq;
1898         tmp.flags = port->flags;
1899         tmp.baud_base = (bp->oscfreq + CD180_TPC/2) / CD180_TPC;
1900         tmp.close_delay = port->close_delay * HZ/100;
1901         tmp.closing_wait = port->closing_wait * HZ/100;
1902         tmp.xmit_fifo_size = CD180_NFIFO;
1903         copy_to_user(retinfo, &tmp, sizeof(tmp));
1904 #ifdef AURORA_DEBUG
1905 printk("aurora_get_serial_info: end\n");
1906 #endif
1907         return 0;
1908 }
1909
1910 static int aurora_ioctl(struct tty_struct * tty, struct file * filp,
1911                     unsigned int cmd, unsigned long arg)
1912
1913 {
1914         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1915         int retval;
1916
1917 #ifdef AURORA_DEBUG
1918         printk("aurora_ioctl: start\n");
1919 #endif
1920         if ((aurora_paranoia_check(port, tty->name, "aurora_ioctl"))
1921                 return -ENODEV;
1922
1923         switch (cmd) {
1924         case TCSBRK:    /* SVID version: non-zero arg --> no break */
1925                 retval = tty_check_change(tty);
1926                 if (retval)
1927                         return retval;
1928                 tty_wait_until_sent(tty, 0);
1929                 if (!arg)
1930                         aurora_send_break(port, HZ/4);  /* 1/4 second */
1931                 return 0;
1932         case TCSBRKP:   /* support for POSIX tcsendbreak() */
1933                 retval = tty_check_change(tty);
1934                 if (retval)
1935                         return retval;
1936                 tty_wait_until_sent(tty, 0);
1937                 aurora_send_break(port, arg ? arg*(HZ/10) : HZ/4);
1938                 return 0;
1939         case TIOCGSOFTCAR:
1940                 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long *)arg);
1941         case TIOCSSOFTCAR:
1942                 if (get_user(arg,(unsigned long *)arg))
1943                         return -EFAULT;
1944                 tty->termios->c_cflag =
1945                         ((tty->termios->c_cflag & ~CLOCAL) |
1946                          (arg ? CLOCAL : 0));
1947                 return 0;
1948         case TIOCGSERIAL:
1949                 return aurora_get_serial_info(port, (struct serial_struct *) arg);
1950         case TIOCSSERIAL:
1951                 return aurora_set_serial_info(port, (struct serial_struct *) arg);
1952         default:
1953                 return -ENOIOCTLCMD;
1954         };
1955 #ifdef AURORA_DEBUG
1956         printk("aurora_ioctl: end\n");
1957 #endif
1958         return 0;
1959 }
1960
1961 static void aurora_throttle(struct tty_struct * tty)
1962 {
1963         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1964         struct Aurora_board *bp;
1965         unsigned long flags;
1966         unsigned char chip;
1967
1968 #ifdef AURORA_DEBUG
1969         printk("aurora_throttle: start\n");
1970 #endif
1971         if ((aurora_paranoia_check(port, tty->name, "aurora_throttle"))
1972                 return;
1973
1974         bp = port_Board(port);
1975         chip = AURORA_CD180(port_No(port));
1976
1977         save_flags(flags); cli();
1978         port->MSVR &= ~bp->RTS;
1979         sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1980         udelay(1);
1981         if (I_IXOFF(tty))  {
1982                 aurora_wait_CCR(bp->r[chip]);
1983                 sbus_writeb(CCR_SSCH2, &bp->r[chip]->r[CD180_CCR]);
1984                 aurora_wait_CCR(bp->r[chip]);
1985         }
1986         sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1987         restore_flags(flags);
1988 #ifdef AURORA_DEBUG
1989         printk("aurora_throttle: end\n");
1990 #endif
1991 }
1992
1993 static void aurora_unthrottle(struct tty_struct * tty)
1994 {
1995         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1996         struct Aurora_board *bp;
1997         unsigned long flags;
1998         unsigned char chip;
1999
2000 #ifdef AURORA_DEBUG
2001         printk("aurora_unthrottle: start\n");
2002 #endif
2003         if ((aurora_paranoia_check(port, tty->name, "aurora_unthrottle"))
2004                 return;
2005
2006         bp = port_Board(port);
2007
2008         chip = AURORA_CD180(port_No(port));
2009
2010         save_flags(flags); cli();
2011         port->MSVR |= bp->RTS;
2012         sbus_writeb(port_No(port) & 7,
2013                     &bp->r[chip]->r[CD180_CAR]);
2014         udelay(1);
2015         if (I_IXOFF(tty))  {
2016                 aurora_wait_CCR(bp->r[chip]);
2017                 sbus_writeb(CCR_SSCH1,
2018                             &bp->r[chip]->r[CD180_CCR]);
2019                 aurora_wait_CCR(bp->r[chip]);
2020         }
2021         sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
2022         restore_flags(flags);
2023 #ifdef AURORA_DEBUG
2024         printk("aurora_unthrottle: end\n");
2025 #endif
2026 }
2027
2028 static void aurora_stop(struct tty_struct * tty)
2029 {
2030         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2031         struct Aurora_board *bp;
2032         unsigned long flags;
2033         unsigned char chip;
2034
2035 #ifdef AURORA_DEBUG
2036         printk("aurora_stop: start\n");
2037 #endif
2038         if ((aurora_paranoia_check(port, tty->name, "aurora_stop"))
2039                 return;
2040
2041         bp = port_Board(port);
2042
2043         chip = AURORA_CD180(port_No(port));
2044
2045         save_flags(flags); cli();
2046         port->SRER &= ~SRER_TXRDY;
2047         sbus_writeb(port_No(port) & 7,
2048                     &bp->r[chip]->r[CD180_CAR]);
2049         udelay(1);
2050         sbus_writeb(port->SRER,
2051                     &bp->r[chip]->r[CD180_SRER]);
2052         restore_flags(flags);
2053 #ifdef AURORA_DEBUG
2054         printk("aurora_stop: end\n");
2055 #endif
2056 }
2057
2058 static void aurora_start(struct tty_struct * tty)
2059 {
2060         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2061         struct Aurora_board *bp;
2062         unsigned long flags;
2063         unsigned char chip;
2064
2065 #ifdef AURORA_DEBUG
2066         printk("aurora_start: start\n");
2067 #endif
2068         if ((aurora_paranoia_check(port, tty->name, "aurora_start"))
2069                 return;
2070
2071         bp = port_Board(port);
2072
2073         chip = AURORA_CD180(port_No(port));
2074
2075         save_flags(flags); cli();
2076         if (port->xmit_cnt && port->xmit_buf && !(port->SRER & SRER_TXRDY))  {
2077                 port->SRER |= SRER_TXRDY;
2078                 sbus_writeb(port_No(port) & 7,
2079                             &bp->r[chip]->r[CD180_CAR]);
2080                 udelay(1);
2081                 sbus_writeb(port->SRER,
2082                             &bp->r[chip]->r[CD180_SRER]);
2083         }
2084         restore_flags(flags);
2085 #ifdef AURORA_DEBUG
2086         printk("aurora_start: end\n");
2087 #endif
2088 }
2089
2090 /*
2091  * This routine is called from the scheduler tqueue when the interrupt
2092  * routine has signalled that a hangup has occurred.  The path of
2093  * hangup processing is:
2094  *
2095  *      serial interrupt routine -> (scheduler tqueue) ->
2096  *      do_aurora_hangup() -> tty->hangup() -> aurora_hangup()
2097  *
2098  */
2099 static void do_aurora_hangup(void *private_)
2100 {
2101         struct Aurora_port      *port = (struct Aurora_port *) private_;
2102         struct tty_struct       *tty;
2103
2104 #ifdef AURORA_DEBUG
2105         printk("do_aurora_hangup: start\n");
2106 #endif
2107         tty = port->tty;
2108         if (tty != NULL) {
2109                 tty_hangup(tty);        /* FIXME: module removal race - AKPM */
2110 #ifdef AURORA_DEBUG
2111                 printk("do_aurora_hangup: end\n");
2112 #endif
2113         }
2114 }
2115
2116 static void aurora_hangup(struct tty_struct * tty)
2117 {
2118         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2119         struct Aurora_board *bp;
2120
2121 #ifdef AURORA_DEBUG
2122         printk("aurora_hangup: start\n");
2123 #endif
2124         if ((aurora_paranoia_check(port, tty->name, "aurora_hangup"))
2125                 return;
2126
2127         bp = port_Board(port);
2128
2129         aurora_shutdown_port(bp, port);
2130         port->event = 0;
2131         port->count = 0;
2132         port->flags &= ~ASYNC_NORMAL_ACTIVE;
2133         port->tty = 0;
2134         wake_up_interruptible(&port->open_wait);
2135 #ifdef AURORA_DEBUG
2136         printk("aurora_hangup: end\n");
2137 #endif
2138 }
2139
2140 static void aurora_set_termios(struct tty_struct * tty, struct termios * old_termios)
2141 {
2142         struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2143         unsigned long flags;
2144
2145 #ifdef AURORA_DEBUG
2146         printk("aurora_set_termios: start\n");
2147 #endif
2148         if ((aurora_paranoia_check(port, tty->name, "aurora_set_termios"))
2149                 return;
2150
2151         if (tty->termios->c_cflag == old_termios->c_cflag &&
2152             tty->termios->c_iflag == old_termios->c_iflag)
2153                 return;
2154
2155         save_flags(flags); cli();
2156         aurora_change_speed(port_Board(port), port);
2157         restore_flags(flags);
2158
2159         if ((old_termios->c_cflag & CRTSCTS) &&
2160             !(tty->termios->c_cflag & CRTSCTS)) {
2161                 tty->hw_stopped = 0;
2162                 aurora_start(tty);
2163         }
2164 #ifdef AURORA_DEBUG
2165         printk("aurora_set_termios: end\n");
2166 #endif
2167 }
2168
2169 static void do_aurora_bh(void)
2170 {
2171          run_task_queue(&tq_aurora);
2172 }
2173
2174 static void do_softint(void *private_)
2175 {
2176         struct Aurora_port      *port = (struct Aurora_port *) private_;
2177         struct tty_struct       *tty;
2178
2179 #ifdef AURORA_DEBUG
2180         printk("do_softint: start\n");
2181 #endif
2182         tty = port->tty;
2183         if (tty == NULL)
2184                 return;
2185
2186         if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) {
2187                 tty_wakeup(tty);
2188         }
2189 #ifdef AURORA_DEBUG
2190         printk("do_softint: end\n");
2191 #endif
2192 }
2193
2194 static struct tty_operations aurora_ops = {
2195         .open  = aurora_open,
2196         .close = aurora_close,
2197         .write = aurora_write,
2198         .put_char = aurora_put_char,
2199         .flush_chars = aurora_flush_chars,
2200         .write_room = aurora_write_room,
2201         .chars_in_buffer = aurora_chars_in_buffer,
2202         .flush_buffer = aurora_flush_buffer,
2203         .ioctl = aurora_ioctl,
2204         .throttle = aurora_throttle,
2205         .unthrottle = aurora_unthrottle,
2206         .set_termios = aurora_set_termios,
2207         .stop = aurora_stop,
2208         .start = aurora_start,
2209         .hangup = aurora_hangup,
2210         .tiocmget = aurora_tiocmget,
2211         .tiocmset = aurora_tiocmset,
2212 };
2213
2214 static int aurora_init_drivers(void)
2215 {
2216         int error;
2217         int i;
2218
2219 #ifdef AURORA_DEBUG
2220         printk("aurora_init_drivers: start\n");
2221 #endif
2222         tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL);
2223         if (tmp_buf == NULL) {
2224                 printk(KERN_ERR "aurora: Couldn't get free page.\n");
2225                 return 1;
2226         }
2227         init_bh(AURORA_BH, do_aurora_bh);
2228         aurora_driver = alloc_tty_driver(AURORA_INPORTS);
2229         if (!aurora_driver) {
2230                 printk(KERN_ERR "aurora: Couldn't allocate tty driver.\n");
2231                 free_page((unsigned long) tmp_buf);
2232                 return 1;
2233         }
2234         aurora_driver->owner = THIS_MODULE;
2235         aurora_driver->name = "ttyA";
2236         aurora_driver->major = AURORA_MAJOR;
2237         aurora_driver->type = TTY_DRIVER_TYPE_SERIAL;
2238         aurora_driver->subtype = SERIAL_TYPE_NORMAL;
2239         aurora_driver->init_termios = tty_std_termios;
2240         aurora_driver->init_termios.c_cflag =
2241                 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2242         aurora_driver->flags = TTY_DRIVER_REAL_RAW;
2243         tty_set_operations(aurora_driver, &aurora_ops);
2244         error = tty_register_driver(aurora_driver);
2245         if (error) {
2246                 put_tty_driver(aurora_driver);
2247                 free_page((unsigned long) tmp_buf);
2248                 printk(KERN_ERR "aurora: Couldn't register aurora driver, error = %d\n",
2249                        error);
2250                 return 1;
2251         }
2252
2253         memset(aurora_port, 0, sizeof(aurora_port));
2254         for (i = 0; i < AURORA_TNPORTS; i++)  {
2255                 aurora_port[i].magic = AURORA_MAGIC;
2256                 aurora_port[i].tqueue.routine = do_softint;
2257                 aurora_port[i].tqueue.data = &aurora_port[i];
2258                 aurora_port[i].tqueue_hangup.routine = do_aurora_hangup;
2259                 aurora_port[i].tqueue_hangup.data = &aurora_port[i];
2260                 aurora_port[i].close_delay = 50 * HZ/100;
2261                 aurora_port[i].closing_wait = 3000 * HZ/100;
2262                 init_waitqueue_head(&aurora_port[i].open_wait);
2263                 init_waitqueue_head(&aurora_port[i].close_wait);
2264         }
2265 #ifdef AURORA_DEBUG
2266         printk("aurora_init_drivers: end\n");
2267 #endif
2268         return 0;
2269 }
2270
2271 static void aurora_release_drivers(void)
2272 {
2273 #ifdef AURORA_DEBUG
2274         printk("aurora_release_drivers: start\n");
2275 #endif
2276         free_page((unsigned long)tmp_buf);
2277         tty_unregister_driver(aurora_driver);
2278         put_tty_driver(aurora_driver);
2279 #ifdef AURORA_DEBUG
2280         printk("aurora_release_drivers: end\n");
2281 #endif
2282 }
2283
2284 /*
2285  * Called at boot time.
2286  *
2287  * You can specify IO base for up to RC_NBOARD cards,
2288  * using line "riscom8=0xiobase1,0xiobase2,.." at LILO prompt.
2289  * Note that there will be no probing at default
2290  * addresses in this case.
2291  *
2292  */
2293 void __init aurora_setup(char *str, int *ints)
2294 {
2295         int i;
2296
2297         for(i=0;(i<ints[0])&&(i<4);i++) {
2298                 if (ints[i+1]) irqs[i]=ints[i+1];
2299                 }
2300 }
2301
2302 static int __init aurora_real_init(void)
2303 {
2304         int found;
2305         int i;
2306
2307         printk(KERN_INFO "aurora: Driver starting.\n");
2308         if(aurora_init_drivers())
2309                 return -EIO;
2310         found = aurora_probe();
2311         if(!found) {
2312                 aurora_release_drivers();
2313                 printk(KERN_INFO "aurora: No Aurora Multiport boards detected.\n");
2314                 return -EIO;
2315         } else {
2316                 printk(KERN_INFO "aurora: %d boards found.\n", found);
2317         }
2318         for (i = 0; i < found; i++) {
2319                 int ret = aurora_setup_board(&aurora_board[i]);
2320
2321                 if (ret) {
2322 #ifdef AURORA_DEBUG
2323                         printk(KERN_ERR "aurora_init: error aurora_setup_board ret %d\n",
2324                                ret);
2325 #endif
2326                         return ret;
2327                 }
2328         }
2329         return 0;
2330 }
2331
2332 int irq  = 0;
2333 int irq1 = 0;
2334 int irq2 = 0;
2335 int irq3 = 0;
2336 module_param(irq , int, 0);
2337 module_param(irq1, int, 0);
2338 module_param(irq2, int, 0);
2339 module_param(irq3, int, 0);
2340
2341 static int __init aurora_init(void)
2342 {
2343         if (irq ) irqs[0]=irq ;
2344         if (irq1) irqs[1]=irq1;
2345         if (irq2) irqs[2]=irq2;
2346         if (irq3) irqs[3]=irq3;
2347         return aurora_real_init();
2348 }
2349
2350 static void __exit aurora_cleanup(void)
2351 {
2352         int i;
2353
2354 #ifdef AURORA_DEBUG
2355 printk("cleanup_module: aurora_release_drivers\n");
2356 #endif
2357
2358         aurora_release_drivers();
2359         for (i = 0; i < AURORA_NBOARD; i++)
2360                 if (aurora_board[i].flags & AURORA_BOARD_PRESENT) {
2361                         aurora_shutdown_board(&aurora_board[i]);
2362                         aurora_release_io_range(&aurora_board[i]);
2363                 }
2364 }
2365
2366 module_init(aurora_init);
2367 module_exit(aurora_cleanup);
2368 MODULE_LICENSE("GPL");