git.oblomov.eu Git - linux-2.6/blob - drivers/char/ip2main.c

   1 /*
   2 *
   3 *   (c) 1999 by Computone Corporation
   4 *
   5 ********************************************************************************
   6 *
   7 *   PACKAGE:     Linux tty Device Driver for IntelliPort family of multiport
   8 *                serial I/O controllers.
   9 *
  10 *   DESCRIPTION: Mainline code for the device driver
  11 *
  12 *******************************************************************************/
  13 // ToDo:
  14 //
  15 // Fix the immediate DSS_NOW problem.
  16 // Work over the channel stats return logic in ip2_ipl_ioctl so they
  17 //      make sense for all 256 possible channels and so the user space
  18 //      utilities will compile and work properly.
  19 //
  20 // Done:
  21 //
  22 // 1.2.14       /\/\|=mhw=|\/\/
  23 // Added bounds checking to ip2_ipl_ioctl to avoid potential terroristic acts.
  24 // Changed the definition of ip2trace to be more consistent with kernel style
  25 //      Thanks to Andreas Dilger <adilger@turbolabs.com> for these updates
  26 //
  27 // 1.2.13       /\/\|=mhw=|\/\/
  28 // DEVFS: Renamed ttf/{n} to tts/F{n} and cuf/{n} to cua/F{n} to conform
  29 //      to agreed devfs serial device naming convention.
  30 //
  31 // 1.2.12       /\/\|=mhw=|\/\/
  32 // Cleaned up some remove queue cut and paste errors
  33 //
  34 // 1.2.11       /\/\|=mhw=|\/\/
  35 // Clean up potential NULL pointer dereferences
  36 // Clean up devfs registration
  37 // Add kernel command line parsing for io and irq
  38 //      Compile defaults for io and irq are now set in ip2.c not ip2/ip2.h!
  39 // Reworked poll_only hack for explicit parameter setting
  40 //      You must now EXPLICITLY set poll_only = 1 or set all irqs to 0
  41 // Merged ip2_loadmain and old_ip2_init
  42 // Converted all instances of interruptible_sleep_on into queue calls
  43 //      Most of these had no race conditions but better to clean up now
  44 //
  45 // 1.2.10       /\/\|=mhw=|\/\/
  46 // Fixed the bottom half interrupt handler and enabled USE_IQI
  47 //      to split the interrupt handler into a formal top-half / bottom-half
  48 // Fixed timing window on high speed processors that queued messages to
  49 //      the outbound mail fifo faster than the board could handle.
  50 //
  51 // 1.2.9
  52 // Four box EX was barfing on >128k kmalloc, made structure smaller by
  53 // reducing output buffer size
  54 //
  55 // 1.2.8
  56 // Device file system support (MHW)
  57 //
  58 // 1.2.7
  59 // Fixed
  60 // Reload of ip2 without unloading ip2main hangs system on cat of /proc/modules
  61 //
  62 // 1.2.6
  63 //Fixes DCD problems
  64 //      DCD was not reported when CLOCAL was set on call to TIOCMGET
  65 //
  66 //Enhancements:
  67 //      TIOCMGET requests and waits for status return
  68 //      No DSS interrupts enabled except for DCD when needed
  69 //
  70 // For internal use only
  71 //
  72 //#define IP2DEBUG_INIT
  73 //#define IP2DEBUG_OPEN
  74 //#define IP2DEBUG_WRITE
  75 //#define IP2DEBUG_READ
  76 //#define IP2DEBUG_IOCTL
  77 //#define IP2DEBUG_IPL
  78
  79 //#define IP2DEBUG_TRACE
  80 //#define DEBUG_FIFO
  81
  82 /************/
  83 /* Includes */
  84 /************/
  85 #include <linux/config.h>
  86
  87 #include <linux/ctype.h>
  88 #include <linux/string.h>
  89 #include <linux/fcntl.h>
  90 #include <linux/errno.h>
  91 #include <linux/module.h>
  92 #include <linux/signal.h>
  93 #include <linux/sched.h>
  94 #include <linux/devfs_fs_kernel.h>
  95 #include <linux/timer.h>
  96 #include <linux/interrupt.h>
  97 #include <linux/pci.h>
  98 #include <linux/mm.h>
  99 #include <linux/slab.h>
 100 #include <linux/major.h>
 101 #include <linux/wait.h>
 102 #include <linux/device.h>
 103
 104 #include <linux/tty.h>
 105 #include <linux/tty_flip.h>
 106 #include <linux/termios.h>
 107 #include <linux/tty_driver.h>
 108 #include <linux/serial.h>
 109 #include <linux/ptrace.h>
 110 #include <linux/ioport.h>
 111
 112 #include <linux/cdk.h>
 113 #include <linux/comstats.h>
 114 #include <linux/delay.h>
 115 #include <linux/bitops.h>
 116
 117 #include <asm/system.h>
 118 #include <asm/io.h>
 119 #include <asm/irq.h>
 120
 121 #include <linux/vmalloc.h>
 122 #include <linux/init.h>
 123
 124 #include <asm/uaccess.h>
 125
 126 #include "./ip2/ip2types.h"
 127 #include "./ip2/ip2trace.h"
 128 #include "./ip2/ip2ioctl.h"
 129 #include "./ip2/ip2.h"
 130 #include "./ip2/i2ellis.h"
 131 #include "./ip2/i2lib.h"
 132
 133 /*****************
 134  * /proc/ip2mem  *
 135  *****************/
 136
 137 #include <linux/proc_fs.h>
 138
 139 static int ip2_read_procmem(char *, char **, off_t, int);
 140 static int ip2_read_proc(char *, char **, off_t, int, int *, void * );
 141
 142 /********************/
 143 /* Type Definitions */
 144 /********************/
 145
 146 /*************/
 147 /* Constants */
 148 /*************/
 149
 150 /* String constants to identify ourselves */
 151 static char *pcName    = "Computone IntelliPort Plus multiport driver";
 152 static char *pcVersion = "1.2.14";
 153
 154 /* String constants for port names */
 155 static char *pcDriver_name   = "ip2";
 156 static char *pcIpl               = "ip2ipl";
 157
 158 /* Serial subtype definitions */
 159 #define SERIAL_TYPE_NORMAL    1
 160
 161 // cheezy kludge or genius - you decide?
 162 int ip2_loadmain(int *, int *, unsigned char *, int);
 163 static unsigned char *Fip_firmware;
 164 static int Fip_firmware_size;
 165
 166 /***********************/
 167 /* Function Prototypes */
 168 /***********************/
 169
 170 /* Global module entry functions */
 171
 172 /* Private (static) functions */
 173 static int  ip2_open(PTTY, struct file *);
 174 static void ip2_close(PTTY, struct file *);
 175 static int  ip2_write(PTTY, int, const unsigned char *, int);
 176 static void ip2_putchar(PTTY, unsigned char);
 177 static void ip2_flush_chars(PTTY);
 178 static int  ip2_write_room(PTTY);
 179 static int  ip2_chars_in_buf(PTTY);
 180 static void ip2_flush_buffer(PTTY);
 181 static int  ip2_ioctl(PTTY, struct file *, UINT, ULONG);
 182 static void ip2_set_termios(PTTY, struct termios *);
 183 static void ip2_set_line_discipline(PTTY);
 184 static void ip2_throttle(PTTY);
 185 static void ip2_unthrottle(PTTY);
 186 static void ip2_stop(PTTY);
 187 static void ip2_start(PTTY);
 188 static void ip2_hangup(PTTY);
 189 static int  ip2_tiocmget(struct tty_struct *tty, struct file *file);
 190 static int  ip2_tiocmset(struct tty_struct *tty, struct file *file,
 191                          unsigned int set, unsigned int clear);
 192
 193 static void set_irq(int, int);
 194 static void ip2_interrupt_bh(i2eBordStrPtr pB);
 195 static irqreturn_t ip2_interrupt(int irq, void *dev_id, struct pt_regs * regs);
 196 static void ip2_poll(unsigned long arg);
 197 static inline void service_all_boards(void);
 198 static void do_input(void *p);
 199 static void do_status(void *p);
 200
 201 static void ip2_wait_until_sent(PTTY,int);
 202
 203 static void set_params (i2ChanStrPtr, struct termios *);
 204 static int get_serial_info(i2ChanStrPtr, struct serial_struct __user *);
 205 static int set_serial_info(i2ChanStrPtr, struct serial_struct __user *);
 206
 207 static ssize_t ip2_ipl_read(struct file *, char __user *, size_t, loff_t *);
 208 static ssize_t ip2_ipl_write(struct file *, const char __user *, size_t, loff_t *);
 209 static int ip2_ipl_ioctl(struct inode *, struct file *, UINT, ULONG);
 210 static int ip2_ipl_open(struct inode *, struct file *);
 211
 212 static int DumpTraceBuffer(char __user *, int);
 213 static int DumpFifoBuffer( char __user *, int);
 214
 215 static void ip2_init_board(int);
 216 static unsigned short find_eisa_board(int);
 217
 218 /***************/
 219 /* Static Data */
 220 /***************/
 221
 222 static struct tty_driver *ip2_tty_driver;
 223
 224 /* Here, then is a table of board pointers which the interrupt routine should
 225  * scan through to determine who it must service.
 226  */
 227 static unsigned short i2nBoards; // Number of boards here
 228
 229 static i2eBordStrPtr i2BoardPtrTable[IP2_MAX_BOARDS];
 230
 231 static i2ChanStrPtr  DevTable[IP2_MAX_PORTS];
 232 //DevTableMem just used to save addresses for kfree
 233 static void  *DevTableMem[IP2_MAX_BOARDS];
 234
 235 /* This is the driver descriptor for the ip2ipl device, which is used to
 236  * download the loadware to the boards.
 237  */
 238 static struct file_operations ip2_ipl = {
 239         .owner          = THIS_MODULE,
 240         .read           = ip2_ipl_read,
 241         .write          = ip2_ipl_write,
 242         .ioctl          = ip2_ipl_ioctl,
 243         .open           = ip2_ipl_open,
 244 };
 245
 246 static unsigned long irq_counter = 0;
 247 static unsigned long bh_counter = 0;
 248
 249 // Use immediate queue to service interrupts
 250 #define USE_IQI
 251 //#define USE_IQ        // PCI&2.2 needs work
 252
 253 /* The timer_list entry for our poll routine. If interrupt operation is not
 254  * selected, the board is serviced periodically to see if anything needs doing.
 255  */
 256 #define  POLL_TIMEOUT   (jiffies + 1)
 257 static DEFINE_TIMER(PollTimer, ip2_poll, 0, 0);
 258 static char  TimerOn;
 259
 260 #ifdef IP2DEBUG_TRACE
 261 /* Trace (debug) buffer data */
 262 #define TRACEMAX  1000
 263 static unsigned long tracebuf[TRACEMAX];
 264 static int tracestuff;
 265 static int tracestrip;
 266 static int tracewrap;
 267 #endif
 268
 269 /**********/
 270 /* Macros */
 271 /**********/
 272
 273 #if defined(MODULE) && defined(IP2DEBUG_OPEN)
 274 #define DBG_CNT(s) printk(KERN_DEBUG "(%s): [%x] refc=%d, ttyc=%d, modc=%x -> %s\n", \
 275                     tty->name,(pCh->flags),ip2_tty_driver->refcount, \
 276                     tty->count,/*GET_USE_COUNT(module)*/0,s)
 277 #else
 278 #define DBG_CNT(s)
 279 #endif
 280
 281 /********/
 282 /* Code */
 283 /********/
 284
 285 #include "./ip2/i2ellis.c"    /* Extremely low-level interface services */
 286 #include "./ip2/i2cmd.c"      /* Standard loadware command definitions */
 287 #include "./ip2/i2lib.c"      /* High level interface services */
 288
 289 /* Configuration area for modprobe */
 290
 291 MODULE_AUTHOR("Doug McNash");
 292 MODULE_DESCRIPTION("Computone IntelliPort Plus Driver");
 293
 294 static int poll_only = 0;
 295
 296 static int Eisa_irq;
 297 static int Eisa_slot;
 298
 299 static int iindx;
 300 static char rirqs[IP2_MAX_BOARDS];
 301 static int Valid_Irqs[] = { 3, 4, 5, 7, 10, 11, 12, 15, 0};
 302
 303 /* for sysfs class support */
 304 static struct class *ip2_class;
 305
 306 // Some functions to keep track of what irq's we have
 307
 308 static int __init
 309 is_valid_irq(int irq)
 310 {
 311         int *i = Valid_Irqs;
 312
 313         while ((*i != 0) && (*i != irq)) {
 314                 i++;
 315         }
 316         return (*i);
 317 }
 318
 319 static void __init
 320 mark_requested_irq( char irq )
 321 {
 322         rirqs[iindx++] = irq;
 323 }
 324
 325 #ifdef MODULE
 326 static int __init
 327 clear_requested_irq( char irq )
 328 {
 329         int i;
 330         for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
 331                 if (rirqs[i] == irq) {
 332                         rirqs[i] = 0;
 333                         return 1;
 334                 }
 335         }
 336         return 0;
 337 }
 338 #endif
 339
 340 static int __init
 341 have_requested_irq( char irq )
 342 {
 343         // array init to zeros so 0 irq will not be requested as a side effect
 344         int i;
 345         for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
 346                 if (rirqs[i] == irq)
 347                         return 1;
 348         }
 349         return 0;
 350 }
 351
 352 /******************************************************************************/
 353 /* Function:   init_module()                                                  */
 354 /* Parameters: None                                                           */
 355 /* Returns:    Success (0)                                                    */
 356 /*                                                                            */
 357 /* Description:                                                               */
 358 /* This is a required entry point for an installable module. It simply calls  */
 359 /* the driver initialisation function and returns what it returns.            */
 360 /******************************************************************************/
 361 #ifdef MODULE
 362 int
 363 init_module(void)
 364 {
 365 #ifdef IP2DEBUG_INIT
 366         printk (KERN_DEBUG "Loading module ...\n" );
 367 #endif
 368     return 0;
 369 }
 370 #endif /* MODULE */
 371
 372 /******************************************************************************/
 373 /* Function:   cleanup_module()                                               */
 374 /* Parameters: None                                                           */
 375 /* Returns:    Nothing                                                        */
 376 /*                                                                            */
 377 /* Description:                                                               */
 378 /* This is a required entry point for an installable module. It has to return */
 379 /* the device and the driver to a passive state. It should not be necessary   */
 380 /* to reset the board fully, especially as the loadware is downloaded         */
 381 /* externally rather than in the driver. We just want to disable the board    */
 382 /* and clear the loadware to a reset state. To allow this there has to be a   */
 383 /* way to detect whether the board has the loadware running at init time to   */
 384 /* handle subsequent installations of the driver. All memory allocated by the */
 385 /* driver should be returned since it may be unloaded from memory.            */
 386 /******************************************************************************/
 387 #ifdef MODULE
 388 void
 389 cleanup_module(void)
 390 {
 391         int err;
 392         int i;
 393
 394 #ifdef IP2DEBUG_INIT
 395         printk (KERN_DEBUG "Unloading %s: version %s\n", pcName, pcVersion );
 396 #endif
 397         /* Stop poll timer if we had one. */
 398         if ( TimerOn ) {
 399                 del_timer ( &PollTimer );
 400                 TimerOn = 0;
 401         }
 402
 403         /* Reset the boards we have. */
 404         for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
 405                 if ( i2BoardPtrTable[i] ) {
 406                         iiReset( i2BoardPtrTable[i] );
 407                 }
 408         }
 409
 410         /* The following is done at most once, if any boards were installed. */
 411         for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
 412                 if ( i2BoardPtrTable[i] ) {
 413                         iiResetDelay( i2BoardPtrTable[i] );
 414                         /* free io addresses and Tibet */
 415                         release_region( ip2config.addr[i], 8 );
 416                         class_device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR, 4 * i));
 417                         devfs_remove("ip2/ipl%d", i);
 418                         class_device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR, 4 * i + 1));
 419                         devfs_remove("ip2/stat%d", i);
 420                 }
 421                 /* Disable and remove interrupt handler. */
 422                 if ( (ip2config.irq[i] > 0) && have_requested_irq(ip2config.irq[i]) ) {
 423                         free_irq ( ip2config.irq[i], (void *)&pcName);
 424                         clear_requested_irq( ip2config.irq[i]);
 425                 }
 426         }
 427         class_destroy(ip2_class);
 428         devfs_remove("ip2");
 429         if ( ( err = tty_unregister_driver ( ip2_tty_driver ) ) ) {
 430                 printk(KERN_ERR "IP2: failed to unregister tty driver (%d)\n", err);
 431         }
 432         put_tty_driver(ip2_tty_driver);
 433         if ( ( err = unregister_chrdev ( IP2_IPL_MAJOR, pcIpl ) ) ) {
 434                 printk(KERN_ERR "IP2: failed to unregister IPL driver (%d)\n", err);
 435         }
 436         remove_proc_entry("ip2mem", &proc_root);
 437
 438         // free memory
 439         for (i = 0; i < IP2_MAX_BOARDS; i++) {
 440                 void *pB;
 441 #ifdef CONFIG_PCI
 442                 if (ip2config.type[i] == PCI && ip2config.pci_dev[i]) {
 443                         pci_disable_device(ip2config.pci_dev[i]);
 444                         ip2config.pci_dev[i] = NULL;
 445                 }
 446 #endif
 447                 if ((pB = i2BoardPtrTable[i]) != 0 ) {
 448                         kfree ( pB );
 449                         i2BoardPtrTable[i] = NULL;
 450                 }
 451                 if ((DevTableMem[i]) != NULL ) {
 452                         kfree ( DevTableMem[i]  );
 453                         DevTableMem[i] = NULL;
 454                 }
 455         }
 456
 457         /* Cleanup the iiEllis subsystem. */
 458         iiEllisCleanup();
 459 #ifdef IP2DEBUG_INIT
 460         printk (KERN_DEBUG "IP2 Unloaded\n" );
 461 #endif
 462 }
 463 #endif /* MODULE */
 464
 465 static struct tty_operations ip2_ops = {
 466         .open            = ip2_open,
 467         .close           = ip2_close,
 468         .write           = ip2_write,
 469         .put_char        = ip2_putchar,
 470         .flush_chars     = ip2_flush_chars,
 471         .write_room      = ip2_write_room,
 472         .chars_in_buffer = ip2_chars_in_buf,
 473         .flush_buffer    = ip2_flush_buffer,
 474         .ioctl           = ip2_ioctl,
 475         .throttle        = ip2_throttle,
 476         .unthrottle      = ip2_unthrottle,
 477         .set_termios     = ip2_set_termios,
 478         .set_ldisc       = ip2_set_line_discipline,
 479         .stop            = ip2_stop,
 480         .start           = ip2_start,
 481         .hangup          = ip2_hangup,
 482         .read_proc       = ip2_read_proc,
 483         .tiocmget        = ip2_tiocmget,
 484         .tiocmset        = ip2_tiocmset,
 485 };
 486
 487 /******************************************************************************/
 488 /* Function:   ip2_loadmain()                                                 */
 489 /* Parameters: irq, io from command line of insmod et. al.                    */
 490 /*              pointer to fip firmware and firmware size for boards          */
 491 /* Returns:    Success (0)                                                    */
 492 /*                                                                            */
 493 /* Description:                                                               */
 494 /* This was the required entry point for all drivers (now in ip2.c)           */
 495 /* It performs all                                                            */
 496 /* initialisation of the devices and driver structures, and registers itself  */
 497 /* with the relevant kernel modules.                                          */
 498 /******************************************************************************/
 499 /* SA_INTERRUPT- if set blocks all interrupts else only this line */
 500 /* SA_SHIRQ    - for shared irq PCI or maybe EISA only */
 501 /* SA_RANDOM   - can be source for cert. random number generators */
 502 #define IP2_SA_FLAGS    0
 503
 504 int
 505 ip2_loadmain(int *iop, int *irqp, unsigned char *firmware, int firmsize)
 506 {
 507         int i, j, box;
 508         int err = 0;
 509         int status = 0;
 510         static int loaded;
 511         i2eBordStrPtr pB = NULL;
 512         int rc = -1;
 513
 514         ip2trace (ITRC_NO_PORT, ITRC_INIT, ITRC_ENTER, 0 );
 515
 516         /* process command line arguments to modprobe or
 517                 insmod i.e. iop & irqp */
 518         /* irqp and iop should ALWAYS be specified now...  But we check
 519                 them individually just to be sure, anyways... */
 520         for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
 521                 if (iop) {
 522                         ip2config.addr[i] = iop[i];
 523                         if (irqp) {
 524                                 if( irqp[i] >= 0 ) {
 525                                         ip2config.irq[i] = irqp[i];
 526                                 } else {
 527                                         ip2config.irq[i] = 0;
 528                                 }
 529         // This is a little bit of a hack.  If poll_only=1 on command
 530         // line back in ip2.c OR all IRQs on all specified boards are
 531         // explicitly set to 0, then drop to poll only mode and override
 532         // PCI or EISA interrupts.  This superceeds the old hack of
 533         // triggering if all interrupts were zero (like da default).
 534         // Still a hack but less prone to random acts of terrorism.
 535         //
 536         // What we really should do, now that the IRQ default is set
 537         // to -1, is to use 0 as a hard coded, do not probe.
 538         //
 539         //      /\/\|=mhw=|\/\/
 540                                 poll_only |= irqp[i];
 541                         }
 542                 }
 543         }
 544         poll_only = !poll_only;
 545
 546         Fip_firmware = firmware;
 547         Fip_firmware_size = firmsize;
 548
 549         /* Announce our presence */
 550         printk( KERN_INFO "%s version %s\n", pcName, pcVersion );
 551
 552         // ip2 can be unloaded and reloaded for no good reason
 553         // we can't let that happen here or bad things happen
 554         // second load hoses board but not system - fixme later
 555         if (loaded) {
 556                 printk( KERN_INFO "Still loaded\n" );
 557                 return 0;
 558         }
 559         loaded++;
 560
 561         ip2_tty_driver = alloc_tty_driver(IP2_MAX_PORTS);
 562         if (!ip2_tty_driver)
 563                 return -ENOMEM;
 564
 565         /* Initialise the iiEllis subsystem. */
 566         iiEllisInit();
 567
 568         /* Initialize arrays. */
 569         memset( i2BoardPtrTable, 0, sizeof i2BoardPtrTable );
 570         memset( DevTable, 0, sizeof DevTable );
 571
 572         /* Initialise all the boards we can find (up to the maximum). */
 573         for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
 574                 switch ( ip2config.addr[i] ) {
 575                 case 0: /* skip this slot even if card is present */
 576                         break;
 577                 default: /* ISA */
 578                    /* ISA address must be specified */
 579                         if ( (ip2config.addr[i] < 0x100) || (ip2config.addr[i] > 0x3f8) ) {
 580                                 printk ( KERN_ERR "IP2: Bad ISA board %d address %x\n",
 581                                                          i, ip2config.addr[i] );
 582                                 ip2config.addr[i] = 0;
 583                         } else {
 584                                 ip2config.type[i] = ISA;
 585
 586                                 /* Check for valid irq argument, set for polling if invalid */
 587                                 if (ip2config.irq[i] && !is_valid_irq(ip2config.irq[i])) {
 588                                         printk(KERN_ERR "IP2: Bad IRQ(%d) specified\n",ip2config.irq[i]);
 589                                         ip2config.irq[i] = 0;// 0 is polling and is valid in that sense
 590                                 }
 591                         }
 592                         break;
 593                 case PCI:
 594 #ifdef CONFIG_PCI
 595                         {
 596                                 struct pci_dev *pci_dev_i = NULL;
 597                                 pci_dev_i = pci_find_device(PCI_VENDOR_ID_COMPUTONE,
 598                                                           PCI_DEVICE_ID_COMPUTONE_IP2EX, pci_dev_i);
 599                                 if (pci_dev_i != NULL) {
 600                                         unsigned int addr;
 601
 602                                         if (pci_enable_device(pci_dev_i)) {
 603                                                 printk( KERN_ERR "IP2: can't enable PCI device at %s\n",
 604                                                         pci_name(pci_dev_i));
 605                                                 break;
 606                                         }
 607                                         ip2config.type[i] = PCI;
 608                                         ip2config.pci_dev[i] = pci_dev_i;
 609                                         status =
 610                                         pci_read_config_dword(pci_dev_i, PCI_BASE_ADDRESS_1, &addr);
 611                                         if ( addr & 1 ) {
 612                                                 ip2config.addr[i]=(USHORT)(addr&0xfffe);
 613                                         } else {
 614                                                 printk( KERN_ERR "IP2: PCI I/O address error\n");
 615                                         }
 616
 617 //              If the PCI BIOS assigned it, lets try and use it.  If we
 618 //              can't acquire it or it screws up, deal with it then.
 619
 620 //                                      if (!is_valid_irq(pci_irq)) {
 621 //                                              printk( KERN_ERR "IP2: Bad PCI BIOS IRQ(%d)\n",pci_irq);
 622 //                                              pci_irq = 0;
 623 //                                      }
 624                                         ip2config.irq[i] = pci_dev_i->irq;
 625                                 } else {        // ann error
 626                                         ip2config.addr[i] = 0;
 627                                         if (status == PCIBIOS_DEVICE_NOT_FOUND) {
 628                                                 printk( KERN_ERR "IP2: PCI board %d not found\n", i );
 629                                         } else {
 630                                                 printk( KERN_ERR "IP2: PCI error 0x%x \n", status );
 631                                         }
 632                                 }
 633                         }
 634 #else
 635                         printk( KERN_ERR "IP2: PCI card specified but PCI support not\n");
 636                         printk( KERN_ERR "IP2: configured in this kernel.\n");
 637                         printk( KERN_ERR "IP2: Recompile kernel with CONFIG_PCI defined!\n");
 638 #endif /* CONFIG_PCI */
 639                         break;
 640                 case EISA:
 641                         if ( (ip2config.addr[i] = find_eisa_board( Eisa_slot + 1 )) != 0) {
 642                                 /* Eisa_irq set as side effect, boo */
 643                                 ip2config.type[i] = EISA;
 644                         }
 645                         ip2config.irq[i] = Eisa_irq;
 646                         break;
 647                 }       /* switch */
 648         }       /* for */
 649         for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
 650                 if ( ip2config.addr[i] ) {
 651                         pB = kmalloc( sizeof(i2eBordStr), GFP_KERNEL);
 652                         if ( pB != NULL ) {
 653                                 i2BoardPtrTable[i] = pB;
 654                                 memset( pB, 0, sizeof(i2eBordStr) );
 655                                 iiSetAddress( pB, ip2config.addr[i], ii2DelayTimer );
 656                                 iiReset( pB );
 657                         } else {
 658                                 printk(KERN_ERR "IP2: board memory allocation error\n");
 659                         }
 660                 }
 661         }
 662         for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
 663                 if ( ( pB = i2BoardPtrTable[i] ) != NULL ) {
 664                         iiResetDelay( pB );
 665                         break;
 666                 }
 667         }
 668         for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
 669                 if ( i2BoardPtrTable[i] != NULL ) {
 670                         ip2_init_board( i );
 671                 }
 672         }
 673
 674         ip2trace (ITRC_NO_PORT, ITRC_INIT, 2, 0 );
 675
 676         ip2_tty_driver->owner               = THIS_MODULE;
 677         ip2_tty_driver->name                 = "ttyF";
 678         ip2_tty_driver->devfs_name          = "tts/F";
 679         ip2_tty_driver->driver_name          = pcDriver_name;
 680         ip2_tty_driver->major                = IP2_TTY_MAJOR;
 681         ip2_tty_driver->minor_start          = 0;
 682         ip2_tty_driver->type                 = TTY_DRIVER_TYPE_SERIAL;
 683         ip2_tty_driver->subtype              = SERIAL_TYPE_NORMAL;
 684         ip2_tty_driver->init_termios         = tty_std_termios;
 685         ip2_tty_driver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
 686         ip2_tty_driver->flags                = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
 687         tty_set_operations(ip2_tty_driver, &ip2_ops);
 688
 689         ip2trace (ITRC_NO_PORT, ITRC_INIT, 3, 0 );
 690
 691         /* Register the tty devices. */
 692         if ( ( err = tty_register_driver ( ip2_tty_driver ) ) ) {
 693                 printk(KERN_ERR "IP2: failed to register tty driver (%d)\n", err);
 694                 put_tty_driver(ip2_tty_driver);
 695                 return -EINVAL;
 696         } else
 697         /* Register the IPL driver. */
 698         if ( ( err = register_chrdev ( IP2_IPL_MAJOR, pcIpl, &ip2_ipl ) ) ) {
 699                 printk(KERN_ERR "IP2: failed to register IPL device (%d)\n", err );
 700         } else {
 701                 /* create the sysfs class */
 702                 ip2_class = class_create(THIS_MODULE, "ip2");
 703                 if (IS_ERR(ip2_class)) {
 704                         err = PTR_ERR(ip2_class);
 705                         goto out_chrdev;
 706                 }
 707         }
 708         /* Register the read_procmem thing */
 709         if (!create_proc_info_entry("ip2mem",0,&proc_root,ip2_read_procmem)) {
 710                 printk(KERN_ERR "IP2: failed to register read_procmem\n");
 711         } else {
 712
 713         ip2trace (ITRC_NO_PORT, ITRC_INIT, 4, 0 );
 714                 /* Register the interrupt handler or poll handler, depending upon the
 715                  * specified interrupt.
 716                  */
 717
 718                 for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
 719                         if ( 0 == ip2config.addr[i] ) {
 720                                 continue;
 721                         }
 722
 723                         if ( NULL != ( pB = i2BoardPtrTable[i] ) ) {
 724                                 class_device_create(ip2_class, MKDEV(IP2_IPL_MAJOR,
 725                                                 4 * i), NULL, "ipl%d", i);
 726                                 err = devfs_mk_cdev(MKDEV(IP2_IPL_MAJOR, 4 * i),
 727                                                 S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR,
 728                                                 "ip2/ipl%d", i);
 729                                 if (err) {
 730                                         class_device_destroy(ip2_class,
 731                                                 MKDEV(IP2_IPL_MAJOR, 4 * i));
 732                                         goto out_class;
 733                                 }
 734
 735                                 class_device_create(ip2_class, MKDEV(IP2_IPL_MAJOR,
 736                                                 4 * i + 1), NULL, "stat%d", i);
 737                                 err = devfs_mk_cdev(MKDEV(IP2_IPL_MAJOR, 4 * i + 1),
 738                                                 S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR,
 739                                                 "ip2/stat%d", i);
 740                                 if (err) {
 741                                         class_device_destroy(ip2_class,
 742                                                 MKDEV(IP2_IPL_MAJOR, 4 * i + 1));
 743                                         goto out_class;
 744                                 }
 745
 746                             for ( box = 0; box < ABS_MAX_BOXES; ++box )
 747                             {
 748                                 for ( j = 0; j < ABS_BIGGEST_BOX; ++j )
 749                                 {
 750                                     if ( pB->i2eChannelMap[box] & (1 << j) )
 751                                     {
 752                                         tty_register_device(ip2_tty_driver,
 753                                             j + ABS_BIGGEST_BOX *
 754                                                     (box+i*ABS_MAX_BOXES), NULL);
 755                                     }
 756                                 }
 757                             }
 758                         }
 759
 760                         if (poll_only) {
 761 //              Poll only forces driver to only use polling and
 762 //              to ignore the probed PCI or EISA interrupts.
 763                                 ip2config.irq[i] = CIR_POLL;
 764                         }
 765                         if ( ip2config.irq[i] == CIR_POLL ) {
 766 retry:
 767                                 if (!TimerOn) {
 768                                         PollTimer.expires = POLL_TIMEOUT;
 769                                         add_timer ( &PollTimer );
 770                                         TimerOn = 1;
 771                                         printk( KERN_INFO "IP2: polling\n");
 772                                 }
 773                         } else {
 774                                 if (have_requested_irq(ip2config.irq[i]))
 775                                         continue;
 776                                 rc = request_irq( ip2config.irq[i], ip2_interrupt,
 777                                         IP2_SA_FLAGS | (ip2config.type[i] == PCI ? SA_SHIRQ : 0),
 778                                         pcName, (void *)&pcName);
 779                                 if (rc) {
 780                                         printk(KERN_ERR "IP2: an request_irq failed: error %d\n",rc);
 781                                         ip2config.irq[i] = CIR_POLL;
 782                                         printk( KERN_INFO "IP2: Polling %ld/sec.\n",
 783                                                         (POLL_TIMEOUT - jiffies));
 784                                         goto retry;
 785                                 }
 786                                 mark_requested_irq(ip2config.irq[i]);
 787                                 /* Initialise the interrupt handler bottom half (aka slih). */
 788                         }
 789                 }
 790                 for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
 791                         if ( i2BoardPtrTable[i] ) {
 792                                 set_irq( i, ip2config.irq[i] ); /* set and enable board interrupt */
 793                         }
 794                 }
 795         }
 796         ip2trace (ITRC_NO_PORT, ITRC_INIT, ITRC_RETURN, 0 );
 797         goto out;
 798
 799 out_class:
 800         class_destroy(ip2_class);
 801 out_chrdev:
 802         unregister_chrdev(IP2_IPL_MAJOR, "ip2");
 803 out:
 804         return err;
 805 }
 806
 807 EXPORT_SYMBOL(ip2_loadmain);
 808
 809 /******************************************************************************/
 810 /* Function:   ip2_init_board()                                               */
 811 /* Parameters: Index of board in configuration structure                      */
 812 /* Returns:    Success (0)                                                    */
 813 /*                                                                            */
 814 /* Description:                                                               */
 815 /* This function initializes the specified board. The loadware is copied to   */
 816 /* the board, the channel structures are initialized, and the board details   */
 817 /* are reported on the console.                                               */
 818 /******************************************************************************/
 819 static void __init
 820 ip2_init_board( int boardnum )
 821 {
 822         int i;
 823         int nports = 0, nboxes = 0;
 824         i2ChanStrPtr pCh;
 825         i2eBordStrPtr pB = i2BoardPtrTable[boardnum];
 826
 827         if ( !iiInitialize ( pB ) ) {
 828                 printk ( KERN_ERR "IP2: Failed to initialize board at 0x%x, error %d\n",
 829                          pB->i2eBase, pB->i2eError );
 830                 goto err_initialize;
 831         }
 832         printk(KERN_INFO "IP2: Board %d: addr=0x%x irq=%d\n", boardnum + 1,
 833                ip2config.addr[boardnum], ip2config.irq[boardnum] );
 834
 835         if (!request_region( ip2config.addr[boardnum], 8, pcName )) {
 836                 printk(KERN_ERR "IP2: bad addr=0x%x\n", ip2config.addr[boardnum]);
 837                 goto err_initialize;
 838         }
 839
 840         if ( iiDownloadAll ( pB, (loadHdrStrPtr)Fip_firmware, 1, Fip_firmware_size )
 841             != II_DOWN_GOOD ) {
 842                 printk ( KERN_ERR "IP2: failed to download loadware\n" );
 843                 goto err_release_region;
 844         } else {
 845                 printk ( KERN_INFO "IP2: fv=%d.%d.%d lv=%d.%d.%d\n",
 846                          pB->i2ePom.e.porVersion,
 847                          pB->i2ePom.e.porRevision,
 848                          pB->i2ePom.e.porSubRev, pB->i2eLVersion,
 849                          pB->i2eLRevision, pB->i2eLSub );
 850         }
 851
 852         switch ( pB->i2ePom.e.porID & ~POR_ID_RESERVED ) {
 853
 854         default:
 855                 printk( KERN_ERR "IP2: Unknown board type, ID = %x\n",
 856                                 pB->i2ePom.e.porID );
 857                 nports = 0;
 858                 goto err_release_region;
 859                 break;
 860
 861         case POR_ID_II_4: /* IntelliPort-II, ISA-4 (4xRJ45) */
 862                 printk ( KERN_INFO "IP2: ISA-4\n" );
 863                 nports = 4;
 864                 break;
 865
 866         case POR_ID_II_8: /* IntelliPort-II, 8-port using standard brick. */
 867                 printk ( KERN_INFO "IP2: ISA-8 std\n" );
 868                 nports = 8;
 869                 break;
 870
 871         case POR_ID_II_8R: /* IntelliPort-II, 8-port using RJ11's (no CTS) */
 872                 printk ( KERN_INFO "IP2: ISA-8 RJ11\n" );
 873                 nports = 8;
 874                 break;
 875
 876         case POR_ID_FIIEX: /* IntelliPort IIEX */
 877         {
 878                 int portnum = IP2_PORTS_PER_BOARD * boardnum;
 879                 int            box;
 880
 881                 for( box = 0; box < ABS_MAX_BOXES; ++box ) {
 882                         if ( pB->i2eChannelMap[box] != 0 ) {
 883                                 ++nboxes;
 884                         }
 885                         for( i = 0; i < ABS_BIGGEST_BOX; ++i ) {
 886                                 if ( pB->i2eChannelMap[box] & 1<< i ) {
 887                                         ++nports;
 888                                 }
 889                         }
 890                 }
 891                 DevTableMem[boardnum] = pCh =
 892                         kmalloc( sizeof(i2ChanStr) * nports, GFP_KERNEL );
 893                 if ( !pCh ) {
 894                         printk ( KERN_ERR "IP2: (i2_init_channel:) Out of memory.\n");
 895                         goto err_release_region;
 896                 }
 897                 if ( !i2InitChannels( pB, nports, pCh ) ) {
 898                         printk(KERN_ERR "IP2: i2InitChannels failed: %d\n",pB->i2eError);
 899                         kfree ( pCh );
 900                         goto err_release_region;
 901                 }
 902                 pB->i2eChannelPtr = &DevTable[portnum];
 903                 pB->i2eChannelCnt = ABS_MOST_PORTS;
 904
 905                 for( box = 0; box < ABS_MAX_BOXES; ++box, portnum += ABS_BIGGEST_BOX ) {
 906                         for( i = 0; i < ABS_BIGGEST_BOX; ++i ) {
 907                                 if ( pB->i2eChannelMap[box] & (1 << i) ) {
 908                                         DevTable[portnum + i] = pCh;
 909                                         pCh->port_index = portnum + i;
 910                                         pCh++;
 911                                 }
 912                         }
 913                 }
 914                 printk(KERN_INFO "IP2: EX box=%d ports=%d %d bit\n",
 915                         nboxes, nports, pB->i2eDataWidth16 ? 16 : 8 );
 916                 }
 917                 goto ex_exit;
 918         }
 919         DevTableMem[boardnum] = pCh =
 920                 kmalloc ( sizeof (i2ChanStr) * nports, GFP_KERNEL );
 921         if ( !pCh ) {
 922                 printk ( KERN_ERR "IP2: (i2_init_channel:) Out of memory.\n");
 923                 goto err_release_region;
 924         }
 925         pB->i2eChannelPtr = pCh;
 926         pB->i2eChannelCnt = nports;
 927         if ( !i2InitChannels( pB, nports, pCh ) ) {
 928                 printk(KERN_ERR "IP2: i2InitChannels failed: %d\n",pB->i2eError);
 929                 kfree ( pCh );
 930                 goto err_release_region;
 931         }
 932         pB->i2eChannelPtr = &DevTable[IP2_PORTS_PER_BOARD * boardnum];
 933
 934         for( i = 0; i < pB->i2eChannelCnt; ++i ) {
 935                 DevTable[IP2_PORTS_PER_BOARD * boardnum + i] = pCh;
 936                 pCh->port_index = (IP2_PORTS_PER_BOARD * boardnum) + i;
 937                 pCh++;
 938         }
 939 ex_exit:
 940         INIT_WORK(&pB->tqueue_interrupt, (void(*)(void*)) ip2_interrupt_bh, pB);
 941         return;
 942
 943 err_release_region:
 944         release_region(ip2config.addr[boardnum], 8);
 945 err_initialize:
 946         kfree ( pB );
 947         i2BoardPtrTable[boardnum] = NULL;
 948         return;
 949 }
 950
 951 /******************************************************************************/
 952 /* Function:   find_eisa_board ( int start_slot )                             */
 953 /* Parameters: First slot to check                                            */
 954 /* Returns:    Address of EISA IntelliPort II controller                      */
 955 /*                                                                            */
 956 /* Description:                                                               */
 957 /* This function searches for an EISA IntelliPort controller, starting        */
 958 /* from the specified slot number. If the motherboard is not identified as an */
 959 /* EISA motherboard, or no valid board ID is selected it returns 0. Otherwise */
 960 /* it returns the base address of the controller.                             */
 961 /******************************************************************************/
 962 static unsigned short __init
 963 find_eisa_board( int start_slot )
 964 {
 965         int i, j;
 966         unsigned int idm = 0;
 967         unsigned int idp = 0;
 968         unsigned int base = 0;
 969         unsigned int value;
 970         int setup_address;
 971         int setup_irq;
 972         int ismine = 0;
 973
 974         /*
 975          * First a check for an EISA motherboard, which we do by comparing the
 976          * EISA ID registers for the system board and the first couple of slots.
 977          * No slot ID should match the system board ID, but on an ISA or PCI
 978          * machine the odds are that an empty bus will return similar values for
 979          * each slot.
 980          */
 981         i = 0x0c80;
 982         value = (inb(i) << 24) + (inb(i+1) << 16) + (inb(i+2) << 8) + inb(i+3);
 983         for( i = 0x1c80; i <= 0x4c80; i += 0x1000 ) {
 984                 j = (inb(i)<<24)+(inb(i+1)<<16)+(inb(i+2)<<8)+inb(i+3);
 985                 if ( value == j )
 986                         return 0;
 987         }
 988
 989         /*
 990          * OK, so we are inclined to believe that this is an EISA machine. Find
 991          * an IntelliPort controller.
 992          */
 993         for( i = start_slot; i < 16; i++ ) {
 994                 base = i << 12;
 995                 idm = (inb(base + 0xc80) << 8) | (inb(base + 0xc81) & 0xff);
 996                 idp = (inb(base + 0xc82) << 8) | (inb(base + 0xc83) & 0xff);
 997                 ismine = 0;
 998                 if ( idm == 0x0e8e ) {
 999                         if ( idp == 0x0281 || idp == 0x0218 ) {
1000                                 ismine = 1;
1001                         } else if ( idp == 0x0282 || idp == 0x0283 ) {
1002                                 ismine = 3;     /* Can do edge-trigger */
1003                         }
1004                         if ( ismine ) {
1005                                 Eisa_slot = i;
1006                                 break;
1007                         }
1008                 }
1009         }
1010         if ( !ismine )
1011                 return 0;
1012
1013         /* It's some sort of EISA card, but at what address is it configured? */
1014
1015         setup_address = base + 0xc88;
1016         value = inb(base + 0xc86);
1017         setup_irq = (value & 8) ? Valid_Irqs[value & 7] : 0;
1018
1019         if ( (ismine & 2) && !(value & 0x10) ) {
1020                 ismine = 1;     /* Could be edging, but not */
1021         }
1022
1023         if ( Eisa_irq == 0 ) {
1024                 Eisa_irq = setup_irq;
1025         } else if ( Eisa_irq != setup_irq ) {
1026                 printk ( KERN_ERR "IP2: EISA irq mismatch between EISA controllers\n" );
1027         }
1028
1029 #ifdef IP2DEBUG_INIT
1030 printk(KERN_DEBUG "Computone EISA board in slot %d, I.D. 0x%x%x, Address 0x%x",
1031                base >> 12, idm, idp, setup_address);
1032         if ( Eisa_irq ) {
1033                 printk(KERN_DEBUG ", Interrupt %d %s\n",
1034                        setup_irq, (ismine & 2) ? "(edge)" : "(level)");
1035         } else {
1036                 printk(KERN_DEBUG ", (polled)\n");
1037         }
1038 #endif
1039         return setup_address;
1040 }
1041
1042 /******************************************************************************/
1043 /* Function:   set_irq()                                                      */
1044 /* Parameters: index to board in board table                                  */
1045 /*             IRQ to use                                                     */
1046 /* Returns:    Success (0)                                                    */
1047 /*                                                                            */
1048 /* Description:                                                               */
1049 /******************************************************************************/
1050 static void
1051 set_irq( int boardnum, int boardIrq )
1052 {
1053         unsigned char tempCommand[16];
1054         i2eBordStrPtr pB = i2BoardPtrTable[boardnum];
1055         unsigned long flags;
1056
1057         /*
1058          * Notify the boards they may generate interrupts. This is done by
1059          * sending an in-line command to channel 0 on each board. This is why
1060          * the channels have to be defined already. For each board, if the
1061          * interrupt has never been defined, we must do so NOW, directly, since
1062          * board will not send flow control or even give an interrupt until this
1063          * is done.  If polling we must send 0 as the interrupt parameter.
1064          */
1065
1066         // We will get an interrupt here at the end of this function
1067
1068         iiDisableMailIrq(pB);
1069
1070         /* We build up the entire packet header. */
1071         CHANNEL_OF(tempCommand) = 0;
1072         PTYPE_OF(tempCommand) = PTYPE_INLINE;
1073         CMD_COUNT_OF(tempCommand) = 2;
1074         (CMD_OF(tempCommand))[0] = CMDVALUE_IRQ;
1075         (CMD_OF(tempCommand))[1] = boardIrq;
1076         /*
1077          * Write to FIFO; don't bother to adjust fifo capacity for this, since
1078          * board will respond almost immediately after SendMail hit.
1079          */
1080         WRITE_LOCK_IRQSAVE(&pB->write_fifo_spinlock,flags);
1081         iiWriteBuf(pB, tempCommand, 4);
1082         WRITE_UNLOCK_IRQRESTORE(&pB->write_fifo_spinlock,flags);
1083         pB->i2eUsingIrq = boardIrq;
1084         pB->i2eOutMailWaiting |= MB_OUT_STUFFED;
1085
1086         /* Need to update number of boards before you enable mailbox int */
1087         ++i2nBoards;
1088
1089         CHANNEL_OF(tempCommand) = 0;
1090         PTYPE_OF(tempCommand) = PTYPE_BYPASS;
1091         CMD_COUNT_OF(tempCommand) = 6;
1092         (CMD_OF(tempCommand))[0] = 88;  // SILO
1093         (CMD_OF(tempCommand))[1] = 64;  // chars
1094         (CMD_OF(tempCommand))[2] = 32;  // ms
1095
1096         (CMD_OF(tempCommand))[3] = 28;  // MAX_BLOCK
1097         (CMD_OF(tempCommand))[4] = 64;  // chars
1098
1099         (CMD_OF(tempCommand))[5] = 87;  // HW_TEST
1100         WRITE_LOCK_IRQSAVE(&pB->write_fifo_spinlock,flags);
1101         iiWriteBuf(pB, tempCommand, 8);
1102         WRITE_UNLOCK_IRQRESTORE(&pB->write_fifo_spinlock,flags);
1103
1104         CHANNEL_OF(tempCommand) = 0;
1105         PTYPE_OF(tempCommand) = PTYPE_BYPASS;
1106         CMD_COUNT_OF(tempCommand) = 1;
1107         (CMD_OF(tempCommand))[0] = 84;  /* get BOX_IDS */
1108         iiWriteBuf(pB, tempCommand, 3);
1109
1110 #ifdef XXX
1111         // enable heartbeat for test porpoises
1112         CHANNEL_OF(tempCommand) = 0;
1113         PTYPE_OF(tempCommand) = PTYPE_BYPASS;
1114         CMD_COUNT_OF(tempCommand) = 2;
1115         (CMD_OF(tempCommand))[0] = 44;  /* get ping */
1116         (CMD_OF(tempCommand))[1] = 200; /* 200 ms */
1117         WRITE_LOCK_IRQSAVE(&pB->write_fifo_spinlock,flags);
1118         iiWriteBuf(pB, tempCommand, 4);
1119         WRITE_UNLOCK_IRQRESTORE(&pB->write_fifo_spinlock,flags);
1120 #endif
1121
1122         iiEnableMailIrq(pB);
1123         iiSendPendingMail(pB);
1124 }
1125
1126 /******************************************************************************/
1127 /* Interrupt Handler Section                                                  */
1128 /******************************************************************************/
1129
1130 static inline void
1131 service_all_boards(void)
1132 {
1133         int i;
1134         i2eBordStrPtr  pB;
1135
1136         /* Service every board on the list */
1137         for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
1138                 pB = i2BoardPtrTable[i];
1139                 if ( pB ) {
1140                         i2ServiceBoard( pB );
1141                 }
1142         }
1143 }
1144
1145
1146 /******************************************************************************/
1147 /* Function:   ip2_interrupt_bh(pB)                                           */
1148 /* Parameters: pB - pointer to the board structure                            */
1149 /* Returns:    Nothing                                                        */
1150 /*                                                                            */
1151 /* Description:                                                               */
1152 /*      Service the board in a bottom half interrupt handler and then         */
1153 /*      reenable the board's interrupts if it has an IRQ number               */
1154 /*                                                                            */
1155 /******************************************************************************/
1156 static void
1157 ip2_interrupt_bh(i2eBordStrPtr pB)
1158 {
1159 //      pB better well be set or we have a problem!  We can only get
1160 //      here from the IMMEDIATE queue.  Here, we process the boards.
1161 //      Checking pB doesn't cost much and it saves us from the sanity checkers.
1162
1163         bh_counter++;
1164
1165         if ( pB ) {
1166                 i2ServiceBoard( pB );
1167                 if( pB->i2eUsingIrq ) {
1168 //                      Re-enable his interrupts
1169                         iiEnableMailIrq(pB);
1170                 }
1171         }
1172 }
1173
1174
1175 /******************************************************************************/
1176 /* Function:   ip2_interrupt(int irq, void *dev_id, struct pt_regs * regs)    */
1177 /* Parameters: irq - interrupt number                                         */
1178 /*             pointer to optional device ID structure                        */
1179 /*             pointer to register structure                                  */
1180 /* Returns:    Nothing                                                        */
1181 /*                                                                            */
1182 /* Description:                                                               */
1183 /*                                                                            */
1184 /*      Our task here is simply to identify each board which needs servicing. */
1185 /*      If we are queuing then, queue it to be serviced, and disable its irq  */
1186 /*      mask otherwise process the board directly.                            */
1187 /*                                                                            */
1188 /*      We could queue by IRQ but that just complicates things on both ends   */
1189 /*      with very little gain in performance (how many instructions does      */
1190 /*      it take to iterate on the immediate queue).                           */
1191 /*                                                                            */
1192 /*                                                                            */
1193 /******************************************************************************/
1194 static irqreturn_t
1195 ip2_interrupt(int irq, void *dev_id, struct pt_regs * regs)
1196 {
1197         int i;
1198         i2eBordStrPtr  pB;
1199         int handled = 0;
1200
1201         ip2trace (ITRC_NO_PORT, ITRC_INTR, 99, 1, irq );
1202
1203         /* Service just the boards on the list using this irq */
1204         for( i = 0; i < i2nBoards; ++i ) {
1205                 pB = i2BoardPtrTable[i];
1206
1207 //              Only process those boards which match our IRQ.
1208 //                      IRQ = 0 for polled boards, we won't poll "IRQ" boards
1209
1210                 if ( pB && (pB->i2eUsingIrq == irq) ) {
1211                         handled = 1;
1212 #ifdef USE_IQI
1213
1214                     if (NO_MAIL_HERE != ( pB->i2eStartMail = iiGetMail(pB))) {
1215 //                      Disable his interrupt (will be enabled when serviced)
1216 //                      This is mostly to protect from reentrancy.
1217                         iiDisableMailIrq(pB);
1218
1219 //                      Park the board on the immediate queue for processing.
1220                         schedule_work(&pB->tqueue_interrupt);
1221
1222 //                      Make sure the immediate queue is flagged to fire.
1223                     }
1224 #else
1225 //              We are using immediate servicing here.  This sucks and can
1226 //              cause all sorts of havoc with ppp and others.  The failsafe
1227 //              check on iiSendPendingMail could also throw a hairball.
1228                         i2ServiceBoard( pB );
1229 #endif /* USE_IQI */
1230                 }
1231         }
1232
1233         ++irq_counter;
1234
1235         ip2trace (ITRC_NO_PORT, ITRC_INTR, ITRC_RETURN, 0 );
1236         return IRQ_RETVAL(handled);
1237 }
1238
1239 /******************************************************************************/
1240 /* Function:   ip2_poll(unsigned long arg)                                    */
1241 /* Parameters: ?                                                              */
1242 /* Returns:    Nothing                                                        */
1243 /*                                                                            */
1244 /* Description:                                                               */
1245 /* This function calls the library routine i2ServiceBoard for each board in   */
1246 /* the board table. This is used instead of the interrupt routine when polled */
1247 /* mode is specified.                                                         */
1248 /******************************************************************************/
1249 static void
1250 ip2_poll(unsigned long arg)
1251 {
1252         ip2trace (ITRC_NO_PORT, ITRC_INTR, 100, 0 );
1253
1254         TimerOn = 0; // it's the truth but not checked in service
1255
1256         // Just polled boards, IRQ = 0 will hit all non-interrupt boards.
1257         // It will NOT poll boards handled by hard interrupts.
1258         // The issue of queued BH interrups is handled in ip2_interrupt().
1259         ip2_interrupt(0, NULL, NULL);
1260
1261         PollTimer.expires = POLL_TIMEOUT;
1262         add_timer( &PollTimer );
1263         TimerOn = 1;
1264
1265         ip2trace (ITRC_NO_PORT, ITRC_INTR, ITRC_RETURN, 0 );
1266 }
1267
1268 static void do_input(void *p)
1269 {
1270         i2ChanStrPtr pCh = p;
1271         unsigned long flags;
1272
1273         ip2trace(CHANN, ITRC_INPUT, 21, 0 );
1274
1275         // Data input
1276         if ( pCh->pTTY != NULL ) {
1277                 READ_LOCK_IRQSAVE(&pCh->Ibuf_spinlock,flags)
1278                 if (!pCh->throttled && (pCh->Ibuf_stuff != pCh->Ibuf_strip)) {
1279                         READ_UNLOCK_IRQRESTORE(&pCh->Ibuf_spinlock,flags)
1280                         i2Input( pCh );
1281                 } else
1282                         READ_UNLOCK_IRQRESTORE(&pCh->Ibuf_spinlock,flags)
1283         } else {
1284                 ip2trace(CHANN, ITRC_INPUT, 22, 0 );
1285
1286                 i2InputFlush( pCh );
1287         }
1288 }
1289
1290 // code duplicated from n_tty (ldisc)
1291 static inline void  isig(int sig, struct tty_struct *tty, int flush)
1292 {
1293         if (tty->pgrp > 0)
1294                 kill_pg(tty->pgrp, sig, 1);
1295         if (flush || !L_NOFLSH(tty)) {
1296                 if ( tty->ldisc.flush_buffer )
1297                         tty->ldisc.flush_buffer(tty);
1298                 i2InputFlush( tty->driver_data );
1299         }
1300 }
1301
1302 static void do_status(void *p)
1303 {
1304         i2ChanStrPtr pCh = p;
1305         int status;
1306
1307         status =  i2GetStatus( pCh, (I2_BRK|I2_PAR|I2_FRA|I2_OVR) );
1308
1309         ip2trace (CHANN, ITRC_STATUS, 21, 1, status );
1310
1311         if (pCh->pTTY && (status & (I2_BRK|I2_PAR|I2_FRA|I2_OVR)) ) {
1312                 if ( (status & I2_BRK) ) {
1313                         // code duplicated from n_tty (ldisc)
1314                         if (I_IGNBRK(pCh->pTTY))
1315                                 goto skip_this;
1316                         if (I_BRKINT(pCh->pTTY)) {
1317                                 isig(SIGINT, pCh->pTTY, 1);
1318                                 goto skip_this;
1319                         }
1320                         wake_up_interruptible(&pCh->pTTY->read_wait);
1321                 }
1322 #ifdef NEVER_HAPPENS_AS_SETUP_XXX
1323         // and can't work because we don't know the_char
1324         // as the_char is reported on a separate path
1325         // The intelligent board does this stuff as setup
1326         {
1327         char brkf = TTY_NORMAL;
1328         unsigned char brkc = '\0';
1329         unsigned char tmp;
1330                 if ( (status & I2_BRK) ) {
1331                         brkf = TTY_BREAK;
1332                         brkc = '\0';
1333                 }
1334                 else if (status & I2_PAR) {
1335                         brkf = TTY_PARITY;
1336                         brkc = the_char;
1337                 } else if (status & I2_FRA) {
1338                         brkf = TTY_FRAME;
1339                         brkc = the_char;
1340                 } else if (status & I2_OVR) {
1341                         brkf = TTY_OVERRUN;
1342                         brkc = the_char;
1343                 }
1344                 tmp = pCh->pTTY->real_raw;
1345                 pCh->pTTY->real_raw = 0;
1346                 pCh->pTTY->ldisc.receive_buf( pCh->pTTY, &brkc, &brkf, 1 );
1347                 pCh->pTTY->real_raw = tmp;
1348         }
1349 #endif /* NEVER_HAPPENS_AS_SETUP_XXX */
1350         }
1351 skip_this:
1352
1353         if ( status & (I2_DDCD | I2_DDSR | I2_DCTS | I2_DRI) ) {
1354                 wake_up_interruptible(&pCh->delta_msr_wait);
1355
1356                 if ( (pCh->flags & ASYNC_CHECK_CD) && (status & I2_DDCD) ) {
1357                         if ( status & I2_DCD ) {
1358                                 if ( pCh->wopen ) {
1359                                         wake_up_interruptible ( &pCh->open_wait );
1360                                 }
1361                         } else {
1362                                 if (pCh->pTTY &&  (!(pCh->pTTY->termios->c_cflag & CLOCAL)) ) {
1363                                         tty_hangup( pCh->pTTY );
1364                                 }
1365                         }
1366                 }
1367         }
1368
1369         ip2trace (CHANN, ITRC_STATUS, 26, 0 );
1370 }
1371
1372 /******************************************************************************/
1373 /* Device Open/Close/Ioctl Entry Point Section                                */
1374 /******************************************************************************/
1375
1376 /******************************************************************************/
1377 /* Function:   open_sanity_check()                                            */
1378 /* Parameters: Pointer to tty structure                                       */
1379 /*             Pointer to file structure                                      */
1380 /* Returns:    Success or failure                                             */
1381 /*                                                                            */
1382 /* Description:                                                               */
1383 /* Verifies the structure magic numbers and cross links.                      */
1384 /******************************************************************************/
1385 #ifdef IP2DEBUG_OPEN
1386 static void
1387 open_sanity_check( i2ChanStrPtr pCh, i2eBordStrPtr pBrd )
1388 {
1389         if ( pBrd->i2eValid != I2E_MAGIC ) {
1390                 printk(KERN_ERR "IP2: invalid board structure\n" );
1391         } else if ( pBrd != pCh->pMyBord ) {
1392                 printk(KERN_ERR "IP2: board structure pointer mismatch (%p)\n",
1393                          pCh->pMyBord );
1394         } else if ( pBrd->i2eChannelCnt < pCh->port_index ) {
1395                 printk(KERN_ERR "IP2: bad device index (%d)\n", pCh->port_index );
1396         } else if (&((i2ChanStrPtr)pBrd->i2eChannelPtr)[pCh->port_index] != pCh) {
1397         } else {
1398                 printk(KERN_INFO "IP2: all pointers check out!\n" );
1399         }
1400 }
1401 #endif
1402
1403
1404 /******************************************************************************/
1405 /* Function:   ip2_open()                                                     */
1406 /* Parameters: Pointer to tty structure                                       */
1407 /*             Pointer to file structure                                      */
1408 /* Returns:    Success or failure                                             */
1409 /*                                                                            */
1410 /* Description: (MANDATORY)                                                   */
1411 /* A successful device open has to run a gauntlet of checks before it         */
1412 /* completes. After some sanity checking and pointer setup, the function      */
1413 /* blocks until all conditions are satisfied. It then initialises the port to */
1414 /* the default characteristics and returns.                                   */
1415 /******************************************************************************/
1416 static int
1417 ip2_open( PTTY tty, struct file *pFile )
1418 {
1419         wait_queue_t wait;
1420         int rc = 0;
1421         int do_clocal = 0;
1422         i2ChanStrPtr  pCh = DevTable[tty->index];
1423
1424         ip2trace (tty->index, ITRC_OPEN, ITRC_ENTER, 0 );
1425
1426         if ( pCh == NULL ) {
1427                 return -ENODEV;
1428         }
1429         /* Setup pointer links in device and tty structures */
1430         pCh->pTTY = tty;
1431         tty->driver_data = pCh;
1432
1433 #ifdef IP2DEBUG_OPEN
1434         printk(KERN_DEBUG \
1435                         "IP2:open(tty=%p,pFile=%p):dev=%s,ch=%d,idx=%d\n",
1436                tty, pFile, tty->name, pCh->infl.hd.i2sChannel, pCh->port_index);
1437         open_sanity_check ( pCh, pCh->pMyBord );
1438 #endif
1439
1440         i2QueueCommands(PTYPE_INLINE, pCh, 100, 3, CMD_DTRUP,CMD_RTSUP,CMD_DCD_REP);
1441         pCh->dataSetOut |= (I2_DTR | I2_RTS);
1442         serviceOutgoingFifo( pCh->pMyBord );
1443
1444         /* Block here until the port is ready (per serial and istallion) */
1445         /*
1446          * 1. If the port is in the middle of closing wait for the completion
1447          *    and then return the appropriate error.
1448          */
1449         init_waitqueue_entry(&wait, current);
1450         add_wait_queue(&pCh->close_wait, &wait);
1451         set_current_state( TASK_INTERRUPTIBLE );
1452
1453         if ( tty_hung_up_p(pFile) || ( pCh->flags & ASYNC_CLOSING )) {
1454                 if ( pCh->flags & ASYNC_CLOSING ) {
1455                         schedule();
1456                 }
1457                 if ( tty_hung_up_p(pFile) ) {
1458                         set_current_state( TASK_RUNNING );
1459                         remove_wait_queue(&pCh->close_wait, &wait);
1460                         return( pCh->flags & ASYNC_HUP_NOTIFY ) ? -EAGAIN : -ERESTARTSYS;
1461                 }
1462         }
1463         set_current_state( TASK_RUNNING );
1464         remove_wait_queue(&pCh->close_wait, &wait);
1465
1466         /*
1467          * 3. Handle a non-blocking open of a normal port.
1468          */
1469         if ( (pFile->f_flags & O_NONBLOCK) || (tty->flags & (1<<TTY_IO_ERROR) )) {
1470                 pCh->flags |= ASYNC_NORMAL_ACTIVE;
1471                 goto noblock;
1472         }
1473         /*
1474          * 4. Now loop waiting for the port to be free and carrier present
1475          *    (if required).
1476          */
1477         if ( tty->termios->c_cflag & CLOCAL )
1478                 do_clocal = 1;
1479
1480 #ifdef IP2DEBUG_OPEN
1481         printk(KERN_DEBUG "OpenBlock: do_clocal = %d\n", do_clocal);
1482 #endif
1483
1484         ++pCh->wopen;
1485
1486         init_waitqueue_entry(&wait, current);
1487         add_wait_queue(&pCh->open_wait, &wait);
1488
1489         for(;;) {
1490                 i2QueueCommands(PTYPE_INLINE, pCh, 100, 2, CMD_DTRUP, CMD_RTSUP);
1491                 pCh->dataSetOut |= (I2_DTR | I2_RTS);
1492                 set_current_state( TASK_INTERRUPTIBLE );
1493                 serviceOutgoingFifo( pCh->pMyBord );
1494                 if ( tty_hung_up_p(pFile) ) {
1495                         set_current_state( TASK_RUNNING );
1496                         remove_wait_queue(&pCh->open_wait, &wait);
1497                         return ( pCh->flags & ASYNC_HUP_NOTIFY ) ? -EBUSY : -ERESTARTSYS;
1498                 }
1499                 if (!(pCh->flags & ASYNC_CLOSING) &&
1500                                 (do_clocal || (pCh->dataSetIn & I2_DCD) )) {
1501                         rc = 0;
1502                         break;
1503                 }
1504
1505 #ifdef IP2DEBUG_OPEN
1506                 printk(KERN_DEBUG "ASYNC_CLOSING = %s\n",
1507                         (pCh->flags & ASYNC_CLOSING)?"True":"False");
1508                 printk(KERN_DEBUG "OpenBlock: waiting for CD or signal\n");
1509 #endif
1510                 ip2trace (CHANN, ITRC_OPEN, 3, 2, 0,
1511                                 (pCh->flags & ASYNC_CLOSING) );
1512                 /* check for signal */
1513                 if (signal_pending(current)) {
1514                         rc = (( pCh->flags & ASYNC_HUP_NOTIFY ) ? -EAGAIN : -ERESTARTSYS);
1515                         break;
1516                 }
1517                 schedule();
1518         }
1519         set_current_state( TASK_RUNNING );
1520         remove_wait_queue(&pCh->open_wait, &wait);
1521
1522         --pCh->wopen; //why count?
1523
1524         ip2trace (CHANN, ITRC_OPEN, 4, 0 );
1525
1526         if (rc != 0 ) {
1527                 return rc;
1528         }
1529         pCh->flags |= ASYNC_NORMAL_ACTIVE;
1530
1531 noblock:
1532
1533         /* first open - Assign termios structure to port */
1534         if ( tty->count == 1 ) {
1535                 i2QueueCommands(PTYPE_INLINE, pCh, 0, 2, CMD_CTSFL_DSAB, CMD_RTSFL_DSAB);
1536                 /* Now we must send the termios settings to the loadware */
1537                 set_params( pCh, NULL );
1538         }
1539
1540         /*
1541          * Now set any i2lib options. These may go away if the i2lib code ends
1542          * up rolled into the mainline.
1543          */
1544         pCh->channelOptions |= CO_NBLOCK_WRITE;
1545
1546 #ifdef IP2DEBUG_OPEN
1547         printk (KERN_DEBUG "IP2: open completed\n" );
1548 #endif
1549         serviceOutgoingFifo( pCh->pMyBord );
1550
1551         ip2trace (CHANN, ITRC_OPEN, ITRC_RETURN, 0 );
1552
1553         return 0;
1554 }
1555
1556 /******************************************************************************/
1557 /* Function:   ip2_close()                                                    */
1558 /* Parameters: Pointer to tty structure                                       */
1559 /*             Pointer to file structure                                      */
1560 /* Returns:    Nothing                                                        */
1561 /*                                                                            */
1562 /* Description:                                                               */
1563 /*                                                                            */
1564 /*                                                                            */
1565 /******************************************************************************/
1566 static void
1567 ip2_close( PTTY tty, struct file *pFile )
1568 {
1569         i2ChanStrPtr  pCh = tty->driver_data;
1570
1571         if ( !pCh ) {
1572                 return;
1573         }
1574
1575         ip2trace (CHANN, ITRC_CLOSE, ITRC_ENTER, 0 );
1576
1577 #ifdef IP2DEBUG_OPEN
1578         printk(KERN_DEBUG "IP2:close %s:\n",tty->name);
1579 #endif
1580
1581         if ( tty_hung_up_p ( pFile ) ) {
1582
1583                 ip2trace (CHANN, ITRC_CLOSE, 2, 1, 2 );
1584
1585                 return;
1586         }
1587         if ( tty->count > 1 ) { /* not the last close */
1588
1589                 ip2trace (CHANN, ITRC_CLOSE, 2, 1, 3 );
1590
1591                 return;
1592         }
1593         pCh->flags |= ASYNC_CLOSING;    // last close actually
1594
1595         tty->closing = 1;
1596
1597         if (pCh->ClosingWaitTime != ASYNC_CLOSING_WAIT_NONE) {
1598                 /*
1599                  * Before we drop DTR, make sure the transmitter has completely drained.
1600                  * This uses an timeout, after which the close
1601                  * completes.
1602                  */
1603                 ip2_wait_until_sent(tty, pCh->ClosingWaitTime );
1604         }
1605         /*
1606          * At this point we stop accepting input. Here we flush the channel
1607          * input buffer which will allow the board to send up more data. Any
1608          * additional input is tossed at interrupt/poll time.
1609          */
1610         i2InputFlush( pCh );
1611
1612         /* disable DSS reporting */
1613         i2QueueCommands(PTYPE_INLINE, pCh, 100, 4,
1614                                 CMD_DCD_NREP, CMD_CTS_NREP, CMD_DSR_NREP, CMD_RI_NREP);
1615         if ( !tty || (tty->termios->c_cflag & HUPCL) ) {
1616                 i2QueueCommands(PTYPE_INLINE, pCh, 100, 2, CMD_RTSDN, CMD_DTRDN);
1617                 pCh->dataSetOut &= ~(I2_DTR | I2_RTS);
1618                 i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_PAUSE(25));
1619         }
1620
1621         serviceOutgoingFifo ( pCh->pMyBord );
1622
1623         if ( tty->driver->flush_buffer )
1624                 tty->driver->flush_buffer(tty);
1625         if ( tty->ldisc.flush_buffer )
1626                 tty->ldisc.flush_buffer(tty);
1627         tty->closing = 0;
1628
1629         pCh->pTTY = NULL;
1630
1631         if (pCh->wopen) {
1632                 if (pCh->ClosingDelay) {
1633                         msleep_interruptible(jiffies_to_msecs(pCh->ClosingDelay));
1634                 }
1635                 wake_up_interruptible(&pCh->open_wait);
1636         }
1637
1638         pCh->flags &=~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1639         wake_up_interruptible(&pCh->close_wait);
1640
1641 #ifdef IP2DEBUG_OPEN
1642         DBG_CNT("ip2_close: after wakeups--");
1643 #endif
1644
1645
1646         ip2trace (CHANN, ITRC_CLOSE, ITRC_RETURN, 1, 1 );
1647
1648         return;
1649 }
1650
1651 /******************************************************************************/
1652 /* Function:   ip2_hangup()                                                   */
1653 /* Parameters: Pointer to tty structure                                       */
1654 /* Returns:    Nothing                                                        */
1655 /*                                                                            */
1656 /* Description:                                                               */
1657 /*                                                                            */
1658 /*                                                                            */
1659 /******************************************************************************/
1660 static void
1661 ip2_hangup ( PTTY tty )
1662 {
1663         i2ChanStrPtr  pCh = tty->driver_data;
1664
1665         if( !pCh ) {
1666                 return;
1667         }
1668
1669         ip2trace (CHANN, ITRC_HANGUP, ITRC_ENTER, 0 );
1670
1671         ip2_flush_buffer(tty);
1672
1673         /* disable DSS reporting */
1674
1675         i2QueueCommands(PTYPE_BYPASS, pCh, 0, 1, CMD_DCD_NREP);
1676         i2QueueCommands(PTYPE_INLINE, pCh, 0, 2, CMD_CTSFL_DSAB, CMD_RTSFL_DSAB);
1677         if ( (tty->termios->c_cflag & HUPCL) ) {
1678                 i2QueueCommands(PTYPE_BYPASS, pCh, 0, 2, CMD_RTSDN, CMD_DTRDN);
1679                 pCh->dataSetOut &= ~(I2_DTR | I2_RTS);
1680                 i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_PAUSE(25));
1681         }
1682         i2QueueCommands(PTYPE_INLINE, pCh, 1, 3,
1683                                 CMD_CTS_NREP, CMD_DSR_NREP, CMD_RI_NREP);
1684         serviceOutgoingFifo ( pCh->pMyBord );
1685
1686         wake_up_interruptible ( &pCh->delta_msr_wait );
1687
1688         pCh->flags &= ~ASYNC_NORMAL_ACTIVE;
1689         pCh->pTTY = NULL;
1690         wake_up_interruptible ( &pCh->open_wait );
1691
1692         ip2trace (CHANN, ITRC_HANGUP, ITRC_RETURN, 0 );
1693 }
1694
1695 /******************************************************************************/
1696 /******************************************************************************/
1697 /* Device Output Section                                                      */
1698 /******************************************************************************/
1699 /******************************************************************************/
1700
1701 /******************************************************************************/
1702 /* Function:   ip2_write()                                                    */
1703 /* Parameters: Pointer to tty structure                                       */
1704 /*             Flag denoting data is in user (1) or kernel (0) space          */
1705 /*             Pointer to data                                                */
1706 /*             Number of bytes to write                                       */
1707 /* Returns:    Number of bytes actually written                               */
1708 /*                                                                            */
1709 /* Description: (MANDATORY)                                                   */
1710 /*                                                                            */
1711 /*                                                                            */
1712 /******************************************************************************/
1713 static int
1714 ip2_write( PTTY tty, int user, const unsigned char *pData, int count)
1715 {
1716         i2ChanStrPtr  pCh = tty->driver_data;
1717         int bytesSent = 0;
1718         unsigned long flags;
1719
1720         ip2trace (CHANN, ITRC_WRITE, ITRC_ENTER, 2, count, -1 );
1721
1722         /* Flush out any buffered data left over from ip2_putchar() calls. */
1723         ip2_flush_chars( tty );
1724
1725         /* This is the actual move bit. Make sure it does what we need!!!!! */
1726         WRITE_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
1727         bytesSent = i2Output( pCh, pData, count, user );
1728         WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
1729
1730         ip2trace (CHANN, ITRC_WRITE, ITRC_RETURN, 1, bytesSent );
1731
1732         return bytesSent > 0 ? bytesSent : 0;
1733 }
1734
1735 /******************************************************************************/
1736 /* Function:   ip2_putchar()                                                  */
1737 /* Parameters: Pointer to tty structure                                       */
1738 /*             Character to write                                             */
1739 /* Returns:    Nothing                                                        */
1740 /*                                                                            */
1741 /* Description:                                                               */
1742 /*                                                                            */
1743 /*                                                                            */
1744 /******************************************************************************/
1745 static void
1746 ip2_putchar( PTTY tty, unsigned char ch )
1747 {
1748         i2ChanStrPtr  pCh = tty->driver_data;
1749         unsigned long flags;
1750
1751 //      ip2trace (CHANN, ITRC_PUTC, ITRC_ENTER, 1, ch );
1752
1753         WRITE_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
1754         pCh->Pbuf[pCh->Pbuf_stuff++] = ch;
1755         if ( pCh->Pbuf_stuff == sizeof pCh->Pbuf ) {
1756                 WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
1757                 ip2_flush_chars( tty );
1758         } else
1759                 WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
1760
1761 //      ip2trace (CHANN, ITRC_PUTC, ITRC_RETURN, 1, ch );
1762 }
1763
1764 /******************************************************************************/
1765 /* Function:   ip2_flush_chars()                                              */
1766 /* Parameters: Pointer to tty structure                                       */
1767 /* Returns:    Nothing                                                        */
1768 /*                                                                            */
1769 /* Description:                                                               */
1770 /*                                                                            */
1771 /******************************************************************************/
1772 static void
1773 ip2_flush_chars( PTTY tty )
1774 {
1775         int   strip;
1776         i2ChanStrPtr  pCh = tty->driver_data;
1777         unsigned long flags;
1778
1779         WRITE_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
1780         if ( pCh->Pbuf_stuff ) {
1781
1782 //              ip2trace (CHANN, ITRC_PUTC, 10, 1, strip );
1783
1784                 //
1785                 // We may need to restart i2Output if it does not fullfill this request
1786                 //
1787                 strip = i2Output( pCh, pCh->Pbuf, pCh->Pbuf_stuff, 0 );
1788                 if ( strip != pCh->Pbuf_stuff ) {
1789                         memmove( pCh->Pbuf, &pCh->Pbuf[strip], pCh->Pbuf_stuff - strip );
1790                 }
1791                 pCh->Pbuf_stuff -= strip;
1792         }
1793         WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
1794 }
1795
1796 /******************************************************************************/
1797 /* Function:   ip2_write_room()                                               */
1798 /* Parameters: Pointer to tty structure                                       */
1799 /* Returns:    Number of bytes that the driver can accept                     */
1800 /*                                                                            */
1801 /* Description:                                                               */
1802 /*                                                                            */
1803 /******************************************************************************/
1804 static int
1805 ip2_write_room ( PTTY tty )
1806 {
1807         int bytesFree;
1808         i2ChanStrPtr  pCh = tty->driver_data;
1809         unsigned long flags;
1810
1811         READ_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
1812         bytesFree = i2OutputFree( pCh ) - pCh->Pbuf_stuff;
1813         READ_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
1814
1815         ip2trace (CHANN, ITRC_WRITE, 11, 1, bytesFree );
1816
1817         return ((bytesFree > 0) ? bytesFree : 0);
1818 }
1819
1820 /******************************************************************************/
1821 /* Function:   ip2_chars_in_buf()                                             */
1822 /* Parameters: Pointer to tty structure                                       */
1823 /* Returns:    Number of bytes queued for transmission                        */
1824 /*                                                                            */
1825 /* Description:                                                               */
1826 /*                                                                            */
1827 /*                                                                            */
1828 /******************************************************************************/
1829 static int
1830 ip2_chars_in_buf ( PTTY tty )
1831 {
1832         i2ChanStrPtr  pCh = tty->driver_data;
1833         int rc;
1834         unsigned long flags;
1835
1836         ip2trace (CHANN, ITRC_WRITE, 12, 1, pCh->Obuf_char_count + pCh->Pbuf_stuff );
1837
1838 #ifdef IP2DEBUG_WRITE
1839         printk (KERN_DEBUG "IP2: chars in buffer = %d (%d,%d)\n",
1840                                  pCh->Obuf_char_count + pCh->Pbuf_stuff,
1841                                  pCh->Obuf_char_count, pCh->Pbuf_stuff );
1842 #endif
1843         READ_LOCK_IRQSAVE(&pCh->Obuf_spinlock,flags);
1844         rc =  pCh->Obuf_char_count;
1845         READ_UNLOCK_IRQRESTORE(&pCh->Obuf_spinlock,flags);
1846         READ_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
1847         rc +=  pCh->Pbuf_stuff;
1848         READ_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
1849         return rc;
1850 }
1851
1852 /******************************************************************************/
1853 /* Function:   ip2_flush_buffer()                                             */
1854 /* Parameters: Pointer to tty structure                                       */
1855 /* Returns:    Nothing                                                        */
1856 /*                                                                            */
1857 /* Description:                                                               */
1858 /*                                                                            */
1859 /*                                                                            */
1860 /******************************************************************************/
1861 static void
1862 ip2_flush_buffer( PTTY tty )
1863 {
1864         i2ChanStrPtr  pCh = tty->driver_data;
1865         unsigned long flags;
1866
1867         ip2trace (CHANN, ITRC_FLUSH, ITRC_ENTER, 0 );
1868
1869 #ifdef IP2DEBUG_WRITE
1870         printk (KERN_DEBUG "IP2: flush buffer\n" );
1871 #endif
1872         WRITE_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
1873         pCh->Pbuf_stuff = 0;
1874         WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
1875         i2FlushOutput( pCh );
1876         ip2_owake(tty);
1877
1878         ip2trace (CHANN, ITRC_FLUSH, ITRC_RETURN, 0 );
1879
1880 }
1881
1882 /******************************************************************************/
1883 /* Function:   ip2_wait_until_sent()                                          */
1884 /* Parameters: Pointer to tty structure                                       */
1885 /*             Timeout for wait.                                              */
1886 /* Returns:    Nothing                                                        */
1887 /*                                                                            */
1888 /* Description:                                                               */
1889 /* This function is used in place of the normal tty_wait_until_sent, which    */
1890 /* only waits for the driver buffers to be empty (or rather, those buffers    */
1891 /* reported by chars_in_buffer) which doesn't work for IP2 due to the         */
1892 /* indeterminate number of bytes buffered on the board.                       */
1893 /******************************************************************************/
1894 static void
1895 ip2_wait_until_sent ( PTTY tty, int timeout )
1896 {
1897         int i = jiffies;
1898         i2ChanStrPtr  pCh = tty->driver_data;
1899
1900         tty_wait_until_sent(tty, timeout );
1901         if ( (i = timeout - (jiffies -i)) > 0)
1902                 i2DrainOutput( pCh, i );
1903 }
1904
1905 /******************************************************************************/
1906 /******************************************************************************/
1907 /* Device Input Section                                                       */
1908 /******************************************************************************/
1909 /******************************************************************************/
1910
1911 /******************************************************************************/
1912 /* Function:   ip2_throttle()                                                 */
1913 /* Parameters: Pointer to tty structure                                       */
1914 /* Returns:    Nothing                                                        */
1915 /*                                                                            */
1916 /* Description:                                                               */
1917 /*                                                                            */
1918 /*                                                                            */
1919 /******************************************************************************/
1920 static void
1921 ip2_throttle ( PTTY tty )
1922 {
1923         i2ChanStrPtr  pCh = tty->driver_data;
1924
1925 #ifdef IP2DEBUG_READ
1926         printk (KERN_DEBUG "IP2: throttle\n" );
1927 #endif
1928         /*
1929          * Signal the poll/interrupt handlers not to forward incoming data to
1930          * the line discipline. This will cause the buffers to fill up in the
1931          * library and thus cause the library routines to send the flow control
1932          * stuff.
1933          */
1934         pCh->throttled = 1;
1935 }
1936
1937 /******************************************************************************/
1938 /* Function:   ip2_unthrottle()                                               */
1939 /* Parameters: Pointer to tty structure                                       */
1940 /* Returns:    Nothing                                                        */
1941 /*                                                                            */
1942 /* Description:                                                               */
1943 /*                                                                            */
1944 /*                                                                            */
1945 /******************************************************************************/
1946 static void
1947 ip2_unthrottle ( PTTY tty )
1948 {
1949         i2ChanStrPtr  pCh = tty->driver_data;
1950         unsigned long flags;
1951
1952 #ifdef IP2DEBUG_READ
1953         printk (KERN_DEBUG "IP2: unthrottle\n" );
1954 #endif
1955
1956         /* Pass incoming data up to the line discipline again. */
1957         pCh->throttled = 0;
1958         i2QueueCommands(PTYPE_BYPASS, pCh, 0, 1, CMD_RESUME);
1959         serviceOutgoingFifo( pCh->pMyBord );
1960         READ_LOCK_IRQSAVE(&pCh->Ibuf_spinlock,flags)
1961         if ( pCh->Ibuf_stuff != pCh->Ibuf_strip ) {
1962                 READ_UNLOCK_IRQRESTORE(&pCh->Ibuf_spinlock,flags)
1963 #ifdef IP2DEBUG_READ
1964                 printk (KERN_DEBUG "i2Input called from unthrottle\n" );
1965 #endif
1966                 i2Input( pCh );
1967         } else
1968                 READ_UNLOCK_IRQRESTORE(&pCh->Ibuf_spinlock,flags)
1969 }
1970
1971 static void
1972 ip2_start ( PTTY tty )
1973 {
1974         i2ChanStrPtr  pCh = DevTable[tty->index];
1975
1976         i2QueueCommands(PTYPE_BYPASS, pCh, 0, 1, CMD_RESUME);
1977         i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_UNSUSPEND);
1978         i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_RESUME);
1979 #ifdef IP2DEBUG_WRITE
1980         printk (KERN_DEBUG "IP2: start tx\n" );
1981 #endif
1982 }
1983
1984 static void
1985 ip2_stop ( PTTY tty )
1986 {
1987         i2ChanStrPtr  pCh = DevTable[tty->index];
1988
1989         i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_SUSPEND);
1990 #ifdef IP2DEBUG_WRITE
1991         printk (KERN_DEBUG "IP2: stop tx\n" );
1992 #endif
1993 }
1994
1995 /******************************************************************************/
1996 /* Device Ioctl Section                                                       */
1997 /******************************************************************************/
1998
1999 static int ip2_tiocmget(struct tty_struct *tty, struct file *file)
2000 {
2001         i2ChanStrPtr pCh = DevTable[tty->index];
2002         wait_queue_t wait;
2003
2004         if (pCh == NULL)
2005                 return -ENODEV;
2006
2007 /*
2008         FIXME - the following code is causing a NULL pointer dereference in
2009         2.3.51 in an interrupt handler.  It's suppose to prompt the board
2010         to return the DSS signal status immediately.  Why doesn't it do
2011         the same thing in 2.2.14?
2012 */
2013
2014 /*      This thing is still busted in the 1.2.12 driver on 2.4.x
2015         and even hoses the serial console so the oops can be trapped.
2016                 /\/\|=mhw=|\/\/                 */
2017
2018 #ifdef  ENABLE_DSSNOW
2019         i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_DSS_NOW);
2020
2021         init_waitqueue_entry(&wait, current);
2022         add_wait_queue(&pCh->dss_now_wait, &wait);
2023         set_current_state( TASK_INTERRUPTIBLE );
2024
2025         serviceOutgoingFifo( pCh->pMyBord );
2026
2027         schedule();
2028
2029         set_current_state( TASK_RUNNING );
2030         remove_wait_queue(&pCh->dss_now_wait, &wait);
2031
2032         if (signal_pending(current)) {
2033                 return -EINTR;
2034         }
2035 #endif
2036         return  ((pCh->dataSetOut & I2_RTS) ? TIOCM_RTS : 0)
2037               | ((pCh->dataSetOut & I2_DTR) ? TIOCM_DTR : 0)
2038               | ((pCh->dataSetIn  & I2_DCD) ? TIOCM_CAR : 0)
2039               | ((pCh->dataSetIn  & I2_RI)  ? TIOCM_RNG : 0)
2040               | ((pCh->dataSetIn  & I2_DSR) ? TIOCM_DSR : 0)
2041               | ((pCh->dataSetIn  & I2_CTS) ? TIOCM_CTS : 0);
2042 }
2043
2044 static int ip2_tiocmset(struct tty_struct *tty, struct file *file,
2045                         unsigned int set, unsigned int clear)
2046 {
2047         i2ChanStrPtr pCh = DevTable[tty->index];
2048
2049         if (pCh == NULL)
2050                 return -ENODEV;
2051
2052         if (set & TIOCM_RTS) {
2053                 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_RTSUP);
2054                 pCh->dataSetOut |= I2_RTS;
2055         }
2056         if (set & TIOCM_DTR) {
2057                 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DTRUP);
2058                 pCh->dataSetOut |= I2_DTR;
2059         }
2060
2061         if (clear & TIOCM_RTS) {
2062                 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_RTSDN);
2063                 pCh->dataSetOut &= ~I2_RTS;
2064         }
2065         if (clear & TIOCM_DTR) {
2066                 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DTRDN);
2067                 pCh->dataSetOut &= ~I2_DTR;
2068         }
2069         serviceOutgoingFifo( pCh->pMyBord );
2070         return 0;
2071 }
2072
2073 /******************************************************************************/
2074 /* Function:   ip2_ioctl()                                                    */
2075 /* Parameters: Pointer to tty structure                                       */
2076 /*             Pointer to file structure                                      */
2077 /*             Command                                                        */
2078 /*             Argument                                                       */
2079 /* Returns:    Success or failure                                             */
2080 /*                                                                            */
2081 /* Description:                                                               */
2082 /*                                                                            */
2083 /*                                                                            */
2084 /******************************************************************************/
2085 static int
2086 ip2_ioctl ( PTTY tty, struct file *pFile, UINT cmd, ULONG arg )
2087 {
2088         wait_queue_t wait;
2089         i2ChanStrPtr pCh = DevTable[tty->index];
2090         struct async_icount cprev, cnow;        /* kernel counter temps */
2091         struct serial_icounter_struct __user *p_cuser;
2092         int rc = 0;
2093         unsigned long flags;
2094         void __user *argp = (void __user *)arg;
2095
2096         if ( pCh == NULL ) {
2097                 return -ENODEV;
2098         }
2099
2100         ip2trace (CHANN, ITRC_IOCTL, ITRC_ENTER, 2, cmd, arg );
2101
2102 #ifdef IP2DEBUG_IOCTL
2103         printk(KERN_DEBUG "IP2: ioctl cmd (%x), arg (%lx)\n", cmd, arg );
2104 #endif
2105
2106         switch(cmd) {
2107         case TIOCGSERIAL:
2108
2109                 ip2trace (CHANN, ITRC_IOCTL, 2, 1, rc );
2110
2111                 rc = get_serial_info(pCh, argp);
2112                 if (rc)
2113                         return rc;
2114                 break;
2115
2116         case TIOCSSERIAL:
2117
2118                 ip2trace (CHANN, ITRC_IOCTL, 3, 1, rc );
2119
2120                 rc = set_serial_info(pCh, argp);
2121                 if (rc)
2122                         return rc;
2123                 break;
2124
2125         case TCXONC:
2126                 rc = tty_check_change(tty);
2127                 if (rc)
2128                         return rc;
2129                 switch (arg) {
2130                 case TCOOFF:
2131                         //return  -ENOIOCTLCMD;
2132                         break;
2133                 case TCOON:
2134                         //return  -ENOIOCTLCMD;
2135                         break;
2136                 case TCIOFF:
2137                         if (STOP_CHAR(tty) != __DISABLED_CHAR) {
2138                                 i2QueueCommands( PTYPE_BYPASS, pCh, 100, 1,
2139                                                 CMD_XMIT_NOW(STOP_CHAR(tty)));
2140                         }
2141                         break;
2142                 case TCION:
2143                         if (START_CHAR(tty) != __DISABLED_CHAR) {
2144                                 i2QueueCommands( PTYPE_BYPASS, pCh, 100, 1,
2145                                                 CMD_XMIT_NOW(START_CHAR(tty)));
2146                         }
2147                         break;
2148                 default:
2149                         return -EINVAL;
2150                 }
2151                 return 0;
2152
2153         case TCSBRK:   /* SVID version: non-zero arg --> no break */
2154                 rc = tty_check_change(tty);
2155
2156                 ip2trace (CHANN, ITRC_IOCTL, 4, 1, rc );
2157
2158                 if (!rc) {
2159                         ip2_wait_until_sent(tty,0);
2160                         if (!arg) {
2161                                 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_SEND_BRK(250));
2162                                 serviceOutgoingFifo( pCh->pMyBord );
2163                         }
2164                 }
2165                 break;
2166
2167         case TCSBRKP:  /* support for POSIX tcsendbreak() */
2168                 rc = tty_check_change(tty);
2169
2170                 ip2trace (CHANN, ITRC_IOCTL, 5, 1, rc );
2171
2172                 if (!rc) {
2173                         ip2_wait_until_sent(tty,0);
2174                         i2QueueCommands(PTYPE_INLINE, pCh, 100, 1,
2175                                 CMD_SEND_BRK(arg ? arg*100 : 250));
2176                         serviceOutgoingFifo ( pCh->pMyBord );
2177                 }
2178                 break;
2179
2180         case TIOCGSOFTCAR:
2181
2182                 ip2trace (CHANN, ITRC_IOCTL, 6, 1, rc );
2183
2184                         rc = put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
2185                 if (rc)
2186                         return rc;
2187         break;
2188
2189         case TIOCSSOFTCAR:
2190
2191                 ip2trace (CHANN, ITRC_IOCTL, 7, 1, rc );
2192
2193                 rc = get_user(arg,(unsigned long __user *) argp);
2194                 if (rc)
2195                         return rc;
2196                 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL)
2197                                          | (arg ? CLOCAL : 0));
2198
2199                 break;
2200
2201         /*
2202          * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change - mask
2203          * passed in arg for lines of interest (use |'ed TIOCM_RNG/DSR/CD/CTS
2204          * for masking). Caller should use TIOCGICOUNT to see which one it was
2205          */
2206         case TIOCMIWAIT:
2207                 save_flags(flags);cli();
2208                 cprev = pCh->icount;     /* note the counters on entry */
2209                 restore_flags(flags);
2210                 i2QueueCommands(PTYPE_BYPASS, pCh, 100, 4,
2211                                                 CMD_DCD_REP, CMD_CTS_REP, CMD_DSR_REP, CMD_RI_REP);
2212                 init_waitqueue_entry(&wait, current);
2213                 add_wait_queue(&pCh->delta_msr_wait, &wait);
2214                 set_current_state( TASK_INTERRUPTIBLE );
2215
2216                 serviceOutgoingFifo( pCh->pMyBord );
2217                 for(;;) {
2218                         ip2trace (CHANN, ITRC_IOCTL, 10, 0 );
2219
2220                         schedule();
2221
2222                         ip2trace (CHANN, ITRC_IOCTL, 11, 0 );
2223
2224                         /* see if a signal did it */
2225                         if (signal_pending(current)) {
2226                                 rc = -ERESTARTSYS;
2227                                 break;
2228                         }
2229                         save_flags(flags);cli();
2230                         cnow = pCh->icount; /* atomic copy */
2231                         restore_flags(flags);
2232                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2233                                 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
2234                                 rc =  -EIO; /* no change => rc */
2235                                 break;
2236                         }
2237                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2238                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2239                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
2240                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
2241                                 rc =  0;
2242                                 break;
2243                         }
2244                         cprev = cnow;
2245                 }
2246                 set_current_state( TASK_RUNNING );
2247                 remove_wait_queue(&pCh->delta_msr_wait, &wait);
2248
2249                 i2QueueCommands(PTYPE_BYPASS, pCh, 100, 3,
2250                                                  CMD_CTS_NREP, CMD_DSR_NREP, CMD_RI_NREP);
2251                 if ( ! (pCh->flags      & ASYNC_CHECK_CD)) {
2252                         i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_DCD_NREP);
2253                 }
2254                 serviceOutgoingFifo( pCh->pMyBord );
2255                 return rc;
2256                 break;
2257
2258         /*
2259          * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
2260          * Return: write counters to the user passed counter struct
2261          * NB: both 1->0 and 0->1 transitions are counted except for RI where
2262          * only 0->1 is counted. The controller is quite capable of counting
2263          * both, but this done to preserve compatibility with the standard
2264          * serial driver.
2265          */
2266         case TIOCGICOUNT:
2267                 ip2trace (CHANN, ITRC_IOCTL, 11, 1, rc );
2268
2269                 save_flags(flags);cli();
2270                 cnow = pCh->icount;
2271                 restore_flags(flags);
2272                 p_cuser = argp;
2273                 rc = put_user(cnow.cts, &p_cuser->cts);
2274                 rc = put_user(cnow.dsr, &p_cuser->dsr);
2275                 rc = put_user(cnow.rng, &p_cuser->rng);
2276                 rc = put_user(cnow.dcd, &p_cuser->dcd);
2277                 rc = put_user(cnow.rx, &p_cuser->rx);
2278                 rc = put_user(cnow.tx, &p_cuser->tx);
2279                 rc = put_user(cnow.frame, &p_cuser->frame);
2280                 rc = put_user(cnow.overrun, &p_cuser->overrun);
2281                 rc = put_user(cnow.parity, &p_cuser->parity);
2282                 rc = put_user(cnow.brk, &p_cuser->brk);
2283                 rc = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
2284                 break;
2285
2286         /*
2287          * The rest are not supported by this driver. By returning -ENOIOCTLCMD they
2288          * will be passed to the line discipline for it to handle.
2289          */
2290         case TIOCSERCONFIG:
2291         case TIOCSERGWILD:
2292         case TIOCSERGETLSR:
2293         case TIOCSERSWILD:
2294         case TIOCSERGSTRUCT:
2295         case TIOCSERGETMULTI:
2296         case TIOCSERSETMULTI:
2297
2298         default:
2299                 ip2trace (CHANN, ITRC_IOCTL, 12, 0 );
2300
2301                 rc =  -ENOIOCTLCMD;
2302                 break;
2303         }
2304
2305         ip2trace (CHANN, ITRC_IOCTL, ITRC_RETURN, 0 );
2306
2307         return rc;
2308 }
2309
2310 /******************************************************************************/
2311 /* Function:   GetSerialInfo()                                                */
2312 /* Parameters: Pointer to channel structure                                   */
2313 /*             Pointer to old termios structure                               */
2314 /* Returns:    Nothing                                                        */
2315 /*                                                                            */
2316 /* Description:                                                               */
2317 /* This is to support the setserial command, and requires processing of the   */
2318 /* standard Linux serial structure.                                           */
2319 /******************************************************************************/
2320 static int
2321 get_serial_info ( i2ChanStrPtr pCh, struct serial_struct __user *retinfo )
2322 {
2323         struct serial_struct tmp;
2324
2325         memset ( &tmp, 0, sizeof(tmp) );
2326         tmp.type = pCh->pMyBord->channelBtypes.bid_value[(pCh->port_index & (IP2_PORTS_PER_BOARD-1))/16];
2327         if (BID_HAS_654(tmp.type)) {
2328                 tmp.type = PORT_16650;
2329         } else {
2330                 tmp.type = PORT_CIRRUS;
2331         }
2332         tmp.line = pCh->port_index;
2333         tmp.port = pCh->pMyBord->i2eBase;
2334         tmp.irq  = ip2config.irq[pCh->port_index/64];
2335         tmp.flags = pCh->flags;
2336         tmp.baud_base = pCh->BaudBase;
2337         tmp.close_delay = pCh->ClosingDelay;
2338         tmp.closing_wait = pCh->ClosingWaitTime;
2339         tmp.custom_divisor = pCh->BaudDivisor;
2340         return copy_to_user(retinfo,&tmp,sizeof(*retinfo));
2341 }
2342
2343 /******************************************************************************/
2344 /* Function:   SetSerialInfo()                                                */
2345 /* Parameters: Pointer to channel structure                                   */
2346 /*             Pointer to old termios structure                               */
2347 /* Returns:    Nothing                                                        */
2348 /*                                                                            */
2349 /* Description:                                                               */
2350 /* This function provides support for setserial, which uses the TIOCSSERIAL   */
2351 /* ioctl. Not all setserial parameters are relevant. If the user attempts to  */
2352 /* change the IRQ, address or type of the port the ioctl fails.               */
2353 /******************************************************************************/
2354 static int
2355 set_serial_info( i2ChanStrPtr pCh, struct serial_struct __user *new_info )
2356 {
2357         struct serial_struct ns;
2358         int   old_flags, old_baud_divisor;
2359
2360         if (copy_from_user(&ns, new_info, sizeof (ns)))
2361                 return -EFAULT;
2362
2363         /*
2364          * We don't allow setserial to change IRQ, board address, type or baud
2365          * base. Also line nunber as such is meaningless but we use it for our
2366          * array index so it is fixed also.
2367          */
2368         if ( (ns.irq        != ip2config.irq[pCh->port_index])
2369             || ((int) ns.port      != ((int) (pCh->pMyBord->i2eBase)))
2370             || (ns.baud_base != pCh->BaudBase)
2371             || (ns.line      != pCh->port_index) ) {
2372                 return -EINVAL;
2373         }
2374
2375         old_flags = pCh->flags;
2376         old_baud_divisor = pCh->BaudDivisor;
2377
2378         if ( !capable(CAP_SYS_ADMIN) ) {
2379                 if ( ( ns.close_delay != pCh->ClosingDelay ) ||
2380                     ( (ns.flags & ~ASYNC_USR_MASK) !=
2381                       (pCh->flags & ~ASYNC_USR_MASK) ) ) {
2382                         return -EPERM;
2383                 }
2384
2385                 pCh->flags = (pCh->flags & ~ASYNC_USR_MASK) |
2386                                (ns.flags & ASYNC_USR_MASK);
2387                 pCh->BaudDivisor = ns.custom_divisor;
2388         } else {
2389                 pCh->flags = (pCh->flags & ~ASYNC_FLAGS) |
2390                                (ns.flags & ASYNC_FLAGS);
2391                 pCh->BaudDivisor = ns.custom_divisor;
2392                 pCh->ClosingDelay = ns.close_delay * HZ/100;
2393                 pCh->ClosingWaitTime = ns.closing_wait * HZ/100;
2394         }
2395
2396         if ( ( (old_flags & ASYNC_SPD_MASK) != (pCh->flags & ASYNC_SPD_MASK) )
2397             || (old_baud_divisor != pCh->BaudDivisor) ) {
2398                 // Invalidate speed and reset parameters
2399                 set_params( pCh, NULL );
2400         }
2401
2402         return 0;
2403 }
2404
2405 /******************************************************************************/
2406 /* Function:   ip2_set_termios()                                              */
2407 /* Parameters: Pointer to tty structure                                       */
2408 /*             Pointer to old termios structure                               */
2409 /* Returns:    Nothing                                                        */
2410 /*                                                                            */
2411 /* Description:                                                               */
2412 /*                                                                            */
2413 /*                                                                            */
2414 /******************************************************************************/
2415 static void
2416 ip2_set_termios( PTTY tty, struct termios *old_termios )
2417 {
2418         i2ChanStrPtr pCh = (i2ChanStrPtr)tty->driver_data;
2419
2420 #ifdef IP2DEBUG_IOCTL
2421         printk (KERN_DEBUG "IP2: set termios %p\n", old_termios );
2422 #endif
2423
2424         set_params( pCh, old_termios );
2425 }
2426
2427 /******************************************************************************/
2428 /* Function:   ip2_set_line_discipline()                                      */
2429 /* Parameters: Pointer to tty structure                                       */
2430 /* Returns:    Nothing                                                        */
2431 /*                                                                            */
2432 /* Description:  Does nothing                                                 */
2433 /*                                                                            */
2434 /*                                                                            */
2435 /******************************************************************************/
2436 static void
2437 ip2_set_line_discipline ( PTTY tty )
2438 {
2439 #ifdef IP2DEBUG_IOCTL
2440         printk (KERN_DEBUG "IP2: set line discipline\n" );
2441 #endif
2442
2443         ip2trace (((i2ChanStrPtr)tty->driver_data)->port_index, ITRC_IOCTL, 16, 0 );
2444
2445 }
2446
2447 /******************************************************************************/
2448 /* Function:   SetLine Characteristics()                                      */
2449 /* Parameters: Pointer to channel structure                                   */
2450 /* Returns:    Nothing                                                        */
2451 /*                                                                            */
2452 /* Description:                                                               */
2453 /* This routine is called to update the channel structure with the new line   */
2454 /* characteristics, and send the appropriate commands to the board when they  */
2455 /* change.                                                                    */
2456 /******************************************************************************/
2457 static void
2458 set_params( i2ChanStrPtr pCh, struct termios *o_tios )
2459 {
2460         tcflag_t cflag, iflag, lflag;
2461         char stop_char, start_char;
2462         struct termios dummy;
2463
2464         lflag = pCh->pTTY->termios->c_lflag;
2465         cflag = pCh->pTTY->termios->c_cflag;
2466         iflag = pCh->pTTY->termios->c_iflag;
2467
2468         if (o_tios == NULL) {
2469                 dummy.c_lflag = ~lflag;
2470                 dummy.c_cflag = ~cflag;
2471                 dummy.c_iflag = ~iflag;
2472                 o_tios = &dummy;
2473         }
2474
2475         {
2476                 switch ( cflag & CBAUD ) {
2477                 case B0:
2478                         i2QueueCommands( PTYPE_BYPASS, pCh, 100, 2, CMD_RTSDN, CMD_DTRDN);
2479                         pCh->dataSetOut &= ~(I2_DTR | I2_RTS);
2480                         i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_PAUSE(25));
2481                         pCh->pTTY->termios->c_cflag |= (CBAUD & o_tios->c_cflag);
2482                         goto service_it;
2483                         break;
2484                 case B38400:
2485                         /*
2486                          * This is the speed that is overloaded with all the other high
2487                          * speeds, depending upon the flag settings.
2488                          */
2489                         if ( ( pCh->flags & ASYNC_SPD_MASK ) == ASYNC_SPD_HI ) {
2490                                 pCh->speed = CBR_57600;
2491                         } else if ( (pCh->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI ) {
2492                                 pCh->speed = CBR_115200;
2493                         } else if ( (pCh->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST ) {
2494                                 pCh->speed = CBR_C1;
2495                         } else {
2496                                 pCh->speed = CBR_38400;
2497                         }
2498                         break;
2499                 case B50:      pCh->speed = CBR_50;      break;
2500                 case B75:      pCh->speed = CBR_75;      break;
2501                 case B110:     pCh->speed = CBR_110;     break;
2502                 case B134:     pCh->speed = CBR_134;     break;
2503                 case B150:     pCh->speed = CBR_150;     break;
2504                 case B200:     pCh->speed = CBR_200;     break;
2505                 case B300:     pCh->speed = CBR_300;     break;
2506                 case B600:     pCh->speed = CBR_600;     break;
2507                 case B1200:    pCh->speed = CBR_1200;    break;
2508                 case B1800:    pCh->speed = CBR_1800;    break;
2509                 case B2400:    pCh->speed = CBR_2400;    break;
2510                 case B4800:    pCh->speed = CBR_4800;    break;
2511                 case B9600:    pCh->speed = CBR_9600;    break;
2512                 case B19200:   pCh->speed = CBR_19200;   break;
2513                 case B57600:   pCh->speed = CBR_57600;   break;
2514                 case B115200:  pCh->speed = CBR_115200;  break;
2515                 case B153600:  pCh->speed = CBR_153600;  break;
2516                 case B230400:  pCh->speed = CBR_230400;  break;
2517                 case B307200:  pCh->speed = CBR_307200;  break;
2518                 case B460800:  pCh->speed = CBR_460800;  break;
2519                 case B921600:  pCh->speed = CBR_921600;  break;
2520                 default:       pCh->speed = CBR_9600;    break;
2521                 }
2522                 if ( pCh->speed == CBR_C1 ) {
2523                         // Process the custom speed parameters.
2524                         int bps = pCh->BaudBase / pCh->BaudDivisor;
2525                         if ( bps == 921600 ) {
2526                                 pCh->speed = CBR_921600;
2527                         } else {
2528                                 bps = bps/10;
2529                                 i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_BAUD_DEF1(bps) );
2530                         }
2531                 }
2532                 i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_SETBAUD(pCh->speed));
2533
2534                 i2QueueCommands ( PTYPE_INLINE, pCh, 100, 2, CMD_DTRUP, CMD_RTSUP);
2535                 pCh->dataSetOut |= (I2_DTR | I2_RTS);
2536         }
2537         if ( (CSTOPB & cflag) ^ (CSTOPB & o_tios->c_cflag))
2538         {
2539                 i2QueueCommands ( PTYPE_INLINE, pCh, 100, 1,
2540                         CMD_SETSTOP( ( cflag & CSTOPB ) ? CST_2 : CST_1));
2541         }
2542         if (((PARENB|PARODD) & cflag) ^ ((PARENB|PARODD) & o_tios->c_cflag))
2543         {
2544                 i2QueueCommands ( PTYPE_INLINE, pCh, 100, 1,
2545                         CMD_SETPAR(
2546                                 (cflag & PARENB ?  (cflag & PARODD ? CSP_OD : CSP_EV) : CSP_NP)
2547                         )
2548                 );
2549         }
2550         /* byte size and parity */
2551         if ( (CSIZE & cflag)^(CSIZE & o_tios->c_cflag))
2552         {
2553                 int datasize;
2554                 switch ( cflag & CSIZE ) {
2555                 case CS5: datasize = CSZ_5; break;
2556                 case CS6: datasize = CSZ_6; break;
2557                 case CS7: datasize = CSZ_7; break;
2558                 case CS8: datasize = CSZ_8; break;
2559                 default:  datasize = CSZ_5; break;      /* as per serial.c */
2560                 }
2561                 i2QueueCommands ( PTYPE_INLINE, pCh, 100, 1, CMD_SETBITS(datasize) );
2562         }
2563         /* Process CTS flow control flag setting */
2564         if ( (cflag & CRTSCTS) ) {
2565                 i2QueueCommands(PTYPE_INLINE, pCh, 100,
2566                                                 2, CMD_CTSFL_ENAB, CMD_RTSFL_ENAB);
2567         } else {
2568                 i2QueueCommands(PTYPE_INLINE, pCh, 100,
2569                                                 2, CMD_CTSFL_DSAB, CMD_RTSFL_DSAB);
2570         }
2571         //
2572         // Process XON/XOFF flow control flags settings
2573         //
2574         stop_char = STOP_CHAR(pCh->pTTY);
2575         start_char = START_CHAR(pCh->pTTY);
2576
2577         //////////// can't be \000
2578         if (stop_char == __DISABLED_CHAR )
2579         {
2580                 stop_char = ~__DISABLED_CHAR;
2581         }
2582         if (start_char == __DISABLED_CHAR )
2583         {
2584                 start_char = ~__DISABLED_CHAR;
2585         }
2586         /////////////////////////////////
2587
2588         if ( o_tios->c_cc[VSTART] != start_char )
2589         {
2590                 i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_DEF_IXON(start_char));
2591                 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DEF_OXON(start_char));
2592         }
2593         if ( o_tios->c_cc[VSTOP] != stop_char )
2594         {
2595                  i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_DEF_IXOFF(stop_char));
2596                  i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DEF_OXOFF(stop_char));
2597         }
2598         if (stop_char == __DISABLED_CHAR )
2599         {
2600                 stop_char = ~__DISABLED_CHAR;  //TEST123
2601                 goto no_xoff;
2602         }
2603         if ((iflag & (IXOFF))^(o_tios->c_iflag & (IXOFF)))
2604         {
2605                 if ( iflag & IXOFF ) {  // Enable XOFF output flow control
2606                         i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_OXON_OPT(COX_XON));
2607                 } else {        // Disable XOFF output flow control
2608 no_xoff:
2609                         i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_OXON_OPT(COX_NONE));
2610                 }
2611         }
2612         if (start_char == __DISABLED_CHAR )
2613         {
2614                 goto no_xon;
2615         }
2616         if ((iflag & (IXON|IXANY)) ^ (o_tios->c_iflag & (IXON|IXANY)))
2617         {
2618                 if ( iflag & IXON ) {
2619                         if ( iflag & IXANY ) { // Enable XON/XANY output flow control
2620                                 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_IXON_OPT(CIX_XANY));
2621                         } else { // Enable XON output flow control
2622                                 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_IXON_OPT(CIX_XON));
2623                         }
2624                 } else { // Disable XON output flow control
2625 no_xon:
2626                         i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_IXON_OPT(CIX_NONE));
2627                 }
2628         }
2629         if ( (iflag & ISTRIP) ^ ( o_tios->c_iflag & (ISTRIP)) )
2630         {
2631                 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1,
2632                                 CMD_ISTRIP_OPT((iflag & ISTRIP ? 1 : 0)));
2633         }
2634         if ( (iflag & INPCK) ^ ( o_tios->c_iflag & (INPCK)) )
2635         {
2636                 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1,
2637                                 CMD_PARCHK((iflag & INPCK) ? CPK_ENAB : CPK_DSAB));
2638         }
2639
2640         if ( (iflag & (IGNBRK|PARMRK|BRKINT|IGNPAR))
2641                         ^       ( o_tios->c_iflag & (IGNBRK|PARMRK|BRKINT|IGNPAR)) )
2642         {
2643                 char brkrpt = 0;
2644                 char parrpt = 0;
2645
2646                 if ( iflag & IGNBRK ) { /* Ignore breaks altogether */
2647                         /* Ignore breaks altogether */
2648                         i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_BRK_NREP);
2649                 } else {
2650                         if ( iflag & BRKINT ) {
2651                                 if ( iflag & PARMRK ) {
2652                                         brkrpt = 0x0a;  // exception an inline triple
2653                                 } else {
2654                                         brkrpt = 0x1a;  // exception and NULL
2655                                 }
2656                                 brkrpt |= 0x04; // flush input
2657                         } else {
2658                                 if ( iflag & PARMRK ) {
2659                                         brkrpt = 0x0b;  //POSIX triple \0377 \0 \0
2660                                 } else {
2661                                         brkrpt = 0x01;  // Null only
2662                                 }
2663                         }
2664                         i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_BRK_REP(brkrpt));
2665                 }
2666
2667                 if (iflag & IGNPAR) {
2668                         parrpt = 0x20;
2669                                                                                                         /* would be 2 for not cirrus bug */
2670                                                                                                         /* would be 0x20 cept for cirrus bug */
2671                 } else {
2672                         if ( iflag & PARMRK ) {
2673                                 /*
2674                                  * Replace error characters with 3-byte sequence (\0377,\0,char)
2675                                  */
2676                                 parrpt = 0x04 ;
2677                                 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_ISTRIP_OPT((char)0));
2678                         } else {
2679                                 parrpt = 0x03;
2680                         }
2681                 }
2682                 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_SET_ERROR(parrpt));
2683         }
2684         if (cflag & CLOCAL) {
2685                 // Status reporting fails for DCD if this is off
2686                 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DCD_NREP);
2687                 pCh->flags &= ~ASYNC_CHECK_CD;
2688         } else {
2689                 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DCD_REP);
2690                 pCh->flags      |= ASYNC_CHECK_CD;
2691         }
2692
2693 service_it:
2694         i2DrainOutput( pCh, 100 );
2695 }
2696
2697 /******************************************************************************/
2698 /* IPL Device Section                                                         */
2699 /******************************************************************************/
2700
2701 /******************************************************************************/
2702 /* Function:   ip2_ipl_read()                                                  */
2703 /* Parameters: Pointer to device inode                                        */
2704 /*             Pointer to file structure                                      */
2705 /*             Pointer to data                                                */
2706 /*             Number of bytes to read                                        */
2707 /* Returns:    Success or failure                                             */
2708 /*                                                                            */
2709 /* Description:   Ugly                                                        */
2710 /*                                                                            */
2711 /*                                                                            */
2712 /******************************************************************************/
2713
2714 static
2715 ssize_t
2716 ip2_ipl_read(struct file *pFile, char __user *pData, size_t count, loff_t *off )
2717 {
2718         unsigned int minor = iminor(pFile->f_dentry->d_inode);
2719         int rc = 0;
2720
2721 #ifdef IP2DEBUG_IPL
2722         printk (KERN_DEBUG "IP2IPL: read %p, %d bytes\n", pData, count );
2723 #endif
2724
2725         switch( minor ) {
2726         case 0:     // IPL device
2727                 rc = -EINVAL;
2728                 break;
2729         case 1:     // Status dump
2730                 rc = -EINVAL;
2731                 break;
2732         case 2:     // Ping device
2733                 rc = -EINVAL;
2734                 break;
2735         case 3:     // Trace device
2736                 rc = DumpTraceBuffer ( pData, count );
2737                 break;
2738         case 4:     // Trace device
2739                 rc = DumpFifoBuffer ( pData, count );
2740                 break;
2741         default:
2742                 rc = -ENODEV;
2743                 break;
2744         }
2745         return rc;
2746 }
2747
2748 static int
2749 DumpFifoBuffer ( char __user *pData, int count )
2750 {
2751 #ifdef DEBUG_FIFO
2752         int rc;
2753         rc = copy_to_user(pData, DBGBuf, count);
2754
2755         printk(KERN_DEBUG "Last index %d\n", I );
2756
2757         return count;
2758 #endif  /* DEBUG_FIFO */
2759         return 0;
2760 }
2761
2762 static int
2763 DumpTraceBuffer ( char __user *pData, int count )
2764 {
2765 #ifdef IP2DEBUG_TRACE
2766         int rc;
2767         int dumpcount;
2768         int chunk;
2769         int *pIndex = (int __user *)pData;
2770
2771         if ( count < (sizeof(int) * 6) ) {
2772                 return -EIO;
2773         }
2774         rc = put_user(tracewrap, pIndex );
2775         rc = put_user(TRACEMAX, ++pIndex );
2776         rc = put_user(tracestrip, ++pIndex );
2777         rc = put_user(tracestuff, ++pIndex );
2778         pData += sizeof(int) * 6;
2779         count -= sizeof(int) * 6;
2780
2781         dumpcount = tracestuff - tracestrip;
2782         if ( dumpcount < 0 ) {
2783                 dumpcount += TRACEMAX;
2784         }
2785         if ( dumpcount > count ) {
2786                 dumpcount = count;
2787         }
2788         chunk = TRACEMAX - tracestrip;
2789         if ( dumpcount > chunk ) {
2790                 rc = copy_to_user(pData, &tracebuf[tracestrip],
2791                               chunk * sizeof(tracebuf[0]) );
2792                 pData += chunk * sizeof(tracebuf[0]);
2793                 tracestrip = 0;
2794                 chunk = dumpcount - chunk;
2795         } else {
2796                 chunk = dumpcount;
2797         }
2798         rc = copy_to_user(pData, &tracebuf[tracestrip],
2799                       chunk * sizeof(tracebuf[0]) );
2800         tracestrip += chunk;
2801         tracewrap = 0;
2802
2803         rc = put_user(tracestrip, ++pIndex );
2804         rc = put_user(tracestuff, ++pIndex );
2805
2806         return dumpcount;
2807 #else
2808         return 0;
2809 #endif
2810 }
2811
2812 /******************************************************************************/
2813 /* Function:   ip2_ipl_write()                                                 */
2814 /* Parameters:                                                                */
2815 /*             Pointer to file structure                                      */
2816 /*             Pointer to data                                                */
2817 /*             Number of bytes to write                                       */
2818 /* Returns:    Success or failure                                             */
2819 /*                                                                            */
2820 /* Description:                                                               */
2821 /*                                                                            */
2822 /*                                                                            */
2823 /******************************************************************************/
2824 static ssize_t
2825 ip2_ipl_write(struct file *pFile, const char __user *pData, size_t count, loff_t *off)
2826 {
2827 #ifdef IP2DEBUG_IPL
2828         printk (KERN_DEBUG "IP2IPL: write %p, %d bytes\n", pData, count );
2829 #endif
2830         return 0;
2831 }
2832
2833 /******************************************************************************/
2834 /* Function:   ip2_ipl_ioctl()                                                */
2835 /* Parameters: Pointer to device inode                                        */
2836 /*             Pointer to file structure                                      */
2837 /*             Command                                                        */
2838 /*             Argument                                                       */
2839 /* Returns:    Success or failure                                             */
2840 /*                                                                            */
2841 /* Description:                                                               */
2842 /*                                                                            */
2843 /*                                                                            */
2844 /******************************************************************************/
2845 static int
2846 ip2_ipl_ioctl ( struct inode *pInode, struct file *pFile, UINT cmd, ULONG arg )
2847 {
2848         unsigned int iplminor = iminor(pInode);
2849         int rc = 0;
2850         void __user *argp = (void __user *)arg;
2851         ULONG __user *pIndex = argp;
2852         i2eBordStrPtr pB = i2BoardPtrTable[iplminor / 4];
2853         i2ChanStrPtr pCh;
2854
2855 #ifdef IP2DEBUG_IPL
2856         printk (KERN_DEBUG "IP2IPL: ioctl cmd %d, arg %ld\n", cmd, arg );
2857 #endif
2858
2859         switch ( iplminor ) {
2860         case 0:     // IPL device
2861                 rc = -EINVAL;
2862                 break;
2863         case 1:     // Status dump
2864         case 5:
2865         case 9:
2866         case 13:
2867                 switch ( cmd ) {
2868                 case 64:        /* Driver - ip2stat */
2869                         rc = put_user(ip2_tty_driver->refcount, pIndex++ );
2870                         rc = put_user(irq_counter, pIndex++  );
2871                         rc = put_user(bh_counter, pIndex++  );
2872                         break;
2873
2874                 case 65:        /* Board  - ip2stat */
2875                         if ( pB ) {
2876                                 rc = copy_to_user(argp, pB, sizeof(i2eBordStr));
2877                                 rc = put_user(INB(pB->i2eStatus),
2878                                         (ULONG __user *)(arg + (ULONG)(&pB->i2eStatus) - (ULONG)pB ) );
2879                         } else {
2880                                 rc = -ENODEV;
2881                         }
2882                         break;
2883
2884                 default:
2885                         if (cmd < IP2_MAX_PORTS) {
2886                                 pCh = DevTable[cmd];
2887                                 if ( pCh )
2888                                 {
2889                                         rc = copy_to_user(argp, pCh, sizeof(i2ChanStr));
2890                                 } else {
2891                                         rc = -ENODEV;
2892                                 }
2893                         } else {
2894                                 rc = -EINVAL;
2895                         }
2896                 }
2897                 break;
2898
2899         case 2:     // Ping device
2900                 rc = -EINVAL;
2901                 break;
2902         case 3:     // Trace device
2903                 if ( cmd == 1 ) {
2904                         rc = put_user(iiSendPendingMail, pIndex++ );
2905                         rc = put_user(i2InitChannels, pIndex++ );
2906                         rc = put_user(i2QueueNeeds, pIndex++ );
2907                         rc = put_user(i2QueueCommands, pIndex++ );
2908                         rc = put_user(i2GetStatus, pIndex++ );
2909                         rc = put_user(i2Input, pIndex++ );
2910                         rc = put_user(i2InputFlush, pIndex++ );
2911                         rc = put_user(i2Output, pIndex++ );
2912                         rc = put_user(i2FlushOutput, pIndex++ );
2913                         rc = put_user(i2DrainWakeup, pIndex++ );
2914                         rc = put_user(i2DrainOutput, pIndex++ );
2915                         rc = put_user(i2OutputFree, pIndex++ );
2916                         rc = put_user(i2StripFifo, pIndex++ );
2917                         rc = put_user(i2StuffFifoBypass, pIndex++ );
2918                         rc = put_user(i2StuffFifoFlow, pIndex++ );
2919                         rc = put_user(i2StuffFifoInline, pIndex++ );
2920                         rc = put_user(i2ServiceBoard, pIndex++ );
2921                         rc = put_user(serviceOutgoingFifo, pIndex++ );
2922                         // rc = put_user(ip2_init, pIndex++ );
2923                         rc = put_user(ip2_init_board, pIndex++ );
2924                         rc = put_user(find_eisa_board, pIndex++ );
2925                         rc = put_user(set_irq, pIndex++ );
2926                         rc = put_user(ip2_interrupt, pIndex++ );
2927                         rc = put_user(ip2_poll, pIndex++ );
2928                         rc = put_user(service_all_boards, pIndex++ );
2929                         rc = put_user(do_input, pIndex++ );
2930                         rc = put_user(do_status, pIndex++ );
2931 #ifndef IP2DEBUG_OPEN
2932                         rc = put_user(0, pIndex++ );
2933 #else
2934                         rc = put_user(open_sanity_check, pIndex++ );
2935 #endif
2936                         rc = put_user(ip2_open, pIndex++ );
2937                         rc = put_user(ip2_close, pIndex++ );
2938                         rc = put_user(ip2_hangup, pIndex++ );
2939                         rc = put_user(ip2_write, pIndex++ );
2940                         rc = put_user(ip2_putchar, pIndex++ );
2941                         rc = put_user(ip2_flush_chars, pIndex++ );
2942                         rc = put_user(ip2_write_room, pIndex++ );
2943                         rc = put_user(ip2_chars_in_buf, pIndex++ );
2944                         rc = put_user(ip2_flush_buffer, pIndex++ );
2945
2946                         //rc = put_user(ip2_wait_until_sent, pIndex++ );
2947                         rc = put_user(0, pIndex++ );
2948
2949                         rc = put_user(ip2_throttle, pIndex++ );
2950                         rc = put_user(ip2_unthrottle, pIndex++ );
2951                         rc = put_user(ip2_ioctl, pIndex++ );
2952                         rc = put_user(0, pIndex++ );
2953                         rc = put_user(get_serial_info, pIndex++ );
2954                         rc = put_user(set_serial_info, pIndex++ );
2955                         rc = put_user(ip2_set_termios, pIndex++ );
2956                         rc = put_user(ip2_set_line_discipline, pIndex++ );
2957                         rc = put_user(set_params, pIndex++ );
2958                 } else {
2959                         rc = -EINVAL;
2960                 }
2961
2962                 break;
2963
2964         default:
2965                 rc = -ENODEV;
2966                 break;
2967         }
2968         return rc;
2969 }
2970
2971 /******************************************************************************/
2972 /* Function:   ip2_ipl_open()                                                 */
2973 /* Parameters: Pointer to device inode                                        */
2974 /*             Pointer to file structure                                      */
2975 /* Returns:    Success or failure                                             */
2976 /*                                                                            */
2977 /* Description:                                                               */
2978 /*                                                                            */
2979 /*                                                                            */
2980 /******************************************************************************/
2981 static int
2982 ip2_ipl_open( struct inode *pInode, struct file *pFile )
2983 {
2984         unsigned int iplminor = iminor(pInode);
2985         i2eBordStrPtr pB;
2986         i2ChanStrPtr  pCh;
2987
2988 #ifdef IP2DEBUG_IPL
2989         printk (KERN_DEBUG "IP2IPL: open\n" );
2990 #endif
2991
2992         switch(iplminor) {
2993         // These are the IPL devices
2994         case 0:
2995         case 4:
2996         case 8:
2997         case 12:
2998                 break;
2999
3000         // These are the status devices
3001         case 1:
3002         case 5:
3003         case 9:
3004         case 13:
3005                 break;
3006
3007         // These are the debug devices
3008         case 2:
3009         case 6:
3010         case 10:
3011         case 14:
3012                 pB = i2BoardPtrTable[iplminor / 4];
3013                 pCh = (i2ChanStrPtr) pB->i2eChannelPtr;
3014                 break;
3015
3016         // This is the trace device
3017         case 3:
3018                 break;
3019         }
3020         return 0;
3021 }
3022 /******************************************************************************/
3023 /* Function:   ip2_read_procmem                                               */
3024 /* Parameters:                                                                */
3025 /*                                                                            */
3026 /* Returns: Length of output                                                  */
3027 /*                                                                            */
3028 /* Description:                                                               */
3029 /*   Supplies some driver operating parameters                                */
3030 /*      Not real useful unless your debugging the fifo                                                    */
3031 /*                                                                            */
3032 /******************************************************************************/
3033
3034 #define LIMIT  (PAGE_SIZE - 120)
3035
3036 static int
3037 ip2_read_procmem(char *buf, char **start, off_t offset, int len)
3038 {
3039         i2eBordStrPtr  pB;
3040         i2ChanStrPtr  pCh;
3041         PTTY tty;
3042         int i;
3043
3044         len = 0;
3045
3046 #define FMTLINE "%3d: 0x%08x 0x%08x 0%011o 0%011o\n"
3047 #define FMTLIN2 "     0x%04x 0x%04x tx flow 0x%x\n"
3048 #define FMTLIN3 "     0x%04x 0x%04x rc flow\n"
3049
3050         len += sprintf(buf+len,"\n");
3051
3052         for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
3053                 pB = i2BoardPtrTable[i];
3054                 if ( pB ) {
3055                         len += sprintf(buf+len,"board %d:\n",i);
3056                         len += sprintf(buf+len,"\tFifo rem: %d mty: %x outM %x\n",
3057                                 pB->i2eFifoRemains,pB->i2eWaitingForEmptyFifo,pB->i2eOutMailWaiting);
3058                 }
3059         }
3060
3061         len += sprintf(buf+len,"#: tty flags, port flags,     cflags,     iflags\n");
3062         for (i=0; i < IP2_MAX_PORTS; i++) {
3063                 if (len > LIMIT)
3064                         break;
3065                 pCh = DevTable[i];
3066                 if (pCh) {
3067                         tty = pCh->pTTY;
3068                         if (tty && tty->count) {
3069                                 len += sprintf(buf+len,FMTLINE,i,(int)tty->flags,pCh->flags,
3070                                                                         tty->termios->c_cflag,tty->termios->c_iflag);
3071
3072                                 len += sprintf(buf+len,FMTLIN2,
3073                                                 pCh->outfl.asof,pCh->outfl.room,pCh->channelNeeds);
3074                                 len += sprintf(buf+len,FMTLIN3,pCh->infl.asof,pCh->infl.room);
3075                         }
3076                 }
3077         }
3078         return len;
3079 }
3080
3081 /*
3082  * This is the handler for /proc/tty/driver/ip2
3083  *
3084  * This stretch of code has been largely plagerized from at least three
3085  * different sources including ip2mkdev.c and a couple of other drivers.
3086  * The bugs are all mine.  :-)  =mhw=
3087  */
3088 static int ip2_read_proc(char *page, char **start, off_t off,
3089                                 int count, int *eof, void *data)
3090 {
3091         int     i, j, box;
3092         int     len = 0;
3093         int     boxes = 0;
3094         int     ports = 0;
3095         int     tports = 0;
3096         off_t   begin = 0;
3097         i2eBordStrPtr  pB;
3098
3099         len += sprintf(page, "ip2info: 1.0 driver: %s\n", pcVersion );
3100         len += sprintf(page+len, "Driver: SMajor=%d CMajor=%d IMajor=%d MaxBoards=%d MaxBoxes=%d MaxPorts=%d\n",
3101                         IP2_TTY_MAJOR, IP2_CALLOUT_MAJOR, IP2_IPL_MAJOR,
3102                         IP2_MAX_BOARDS, ABS_MAX_BOXES, ABS_BIGGEST_BOX);
3103
3104         for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
3105                 /* This need to be reset for a board by board count... */
3106                 boxes = 0;
3107                 pB = i2BoardPtrTable[i];
3108                 if( pB ) {
3109                         switch( pB->i2ePom.e.porID & ~POR_ID_RESERVED )
3110                         {
3111                         case POR_ID_FIIEX:
3112                                 len += sprintf( page+len, "Board %d: EX ports=", i );
3113                                 for( box = 0; box < ABS_MAX_BOXES; ++box )
3114                                 {
3115                                         ports = 0;
3116
3117                                         if( pB->i2eChannelMap[box] != 0 ) ++boxes;
3118                                         for( j = 0; j < ABS_BIGGEST_BOX; ++j )
3119                                         {
3120                                                 if( pB->i2eChannelMap[box] & 1<< j ) {
3121                                                         ++ports;
3122                                                 }
3123                                         }
3124                                         len += sprintf( page+len, "%d,", ports );
3125                                         tports += ports;
3126                                 }
3127
3128                                 --len;  /* Backup over that last comma */
3129
3130                                 len += sprintf( page+len, " boxes=%d width=%d", boxes, pB->i2eDataWidth16 ? 16 : 8 );
3131                                 break;
3132
3133                         case POR_ID_II_4:
3134                                 len += sprintf(page+len, "Board %d: ISA-4 ports=4 boxes=1", i );
3135                                 tports = ports = 4;
3136                                 break;
3137
3138                         case POR_ID_II_8:
3139                                 len += sprintf(page+len, "Board %d: ISA-8-std ports=8 boxes=1", i );
3140                                 tports = ports = 8;
3141                                 break;
3142
3143                         case POR_ID_II_8R:
3144                                 len += sprintf(page+len, "Board %d: ISA-8-RJ11 ports=8 boxes=1", i );
3145                                 tports = ports = 8;
3146                                 break;
3147
3148                         default:
3149                                 len += sprintf(page+len, "Board %d: unknown", i );
3150                                 /* Don't try and probe for minor numbers */
3151                                 tports = ports = 0;
3152                         }
3153
3154                 } else {
3155                         /* Don't try and probe for minor numbers */
3156                         len += sprintf(page+len, "Board %d: vacant", i );
3157                         tports = ports = 0;
3158                 }
3159
3160                 if( tports ) {
3161                         len += sprintf(page+len, " minors=" );
3162
3163                         for ( box = 0; box < ABS_MAX_BOXES; ++box )
3164                         {
3165                                 for ( j = 0; j < ABS_BIGGEST_BOX; ++j )
3166                                 {
3167                                         if ( pB->i2eChannelMap[box] & (1 << j) )
3168                                         {
3169                                                 len += sprintf (page+len,"%d,",
3170                                                         j + ABS_BIGGEST_BOX *
3171                                                         (box+i*ABS_MAX_BOXES));
3172                                         }
3173                                 }
3174                         }
3175
3176                         page[ len - 1 ] = '\n'; /* Overwrite that last comma */
3177                 } else {
3178                         len += sprintf (page+len,"\n" );
3179                 }
3180
3181                 if (len+begin > off+count)
3182                         break;
3183                 if (len+begin < off) {
3184                         begin += len;
3185                         len = 0;
3186                 }
3187         }
3188
3189         if (i >= IP2_MAX_BOARDS)
3190                 *eof = 1;
3191         if (off >= len+begin)
3192                 return 0;
3193
3194         *start = page + (off-begin);
3195         return ((count < begin+len-off) ? count : begin+len-off);
3196  }
3197
3198 /******************************************************************************/
3199 /* Function:   ip2trace()                                                     */
3200 /* Parameters: Value to add to trace buffer                                   */
3201 /* Returns:    Nothing                                                        */
3202 /*                                                                            */
3203 /* Description:                                                               */
3204 /*                                                                            */
3205 /*                                                                            */
3206 /******************************************************************************/
3207 #ifdef IP2DEBUG_TRACE
3208 void
3209 ip2trace (unsigned short pn, unsigned char cat, unsigned char label, unsigned long codes, ...)
3210 {
3211         long flags;
3212         unsigned long *pCode = &codes;
3213         union ip2breadcrumb bc;
3214         i2ChanStrPtr  pCh;
3215
3216
3217         tracebuf[tracestuff++] = jiffies;
3218         if ( tracestuff == TRACEMAX ) {
3219                 tracestuff = 0;
3220         }
3221         if ( tracestuff == tracestrip ) {
3222                 if ( ++tracestrip == TRACEMAX ) {
3223                         tracestrip = 0;
3224                 }
3225                 ++tracewrap;
3226         }
3227
3228         bc.hdr.port  = 0xff & pn;
3229         bc.hdr.cat   = cat;
3230         bc.hdr.codes = (unsigned char)( codes & 0xff );
3231         bc.hdr.label = label;
3232         tracebuf[tracestuff++] = bc.value;
3233
3234         for (;;) {
3235                 if ( tracestuff == TRACEMAX ) {
3236                         tracestuff = 0;
3237                 }
3238                 if ( tracestuff == tracestrip ) {
3239                         if ( ++tracestrip == TRACEMAX ) {
3240                                 tracestrip = 0;
3241                         }
3242                         ++tracewrap;
3243                 }
3244
3245                 if ( !codes-- )
3246                         break;
3247
3248                 tracebuf[tracestuff++] = *++pCode;
3249         }
3250 }
3251 #endif
3252
3253
3254 MODULE_LICENSE("GPL");