drivers/net/wan/lmc/lmc_media.c

   1 /* $Id: lmc_media.c,v 1.13 2000/04/11 05:25:26 asj Exp $ */
   2
   3 #include <linux/kernel.h>
   4 #include <linux/string.h>
   5 #include <linux/timer.h>
   6 #include <linux/ptrace.h>
   7 #include <linux/errno.h>
   8 #include <linux/ioport.h>
   9 #include <linux/slab.h>
  10 #include <linux/interrupt.h>
  11 #include <linux/in.h>
  12 #include <linux/if_arp.h>
  13 #include <linux/netdevice.h>
  14 #include <linux/etherdevice.h>
  15 #include <linux/skbuff.h>
  16 #include <linux/inet.h>
  17 #include <linux/bitops.h>
  18
  19 #include <net/syncppp.h>
  20
  21 #include <asm/processor.h>             /* Processor type for cache alignment. */
  22 #include <asm/io.h>
  23 #include <asm/dma.h>
  24
  25 #include <asm/uaccess.h>
  26
  27 #include "lmc.h"
  28 #include "lmc_var.h"
  29 #include "lmc_ioctl.h"
  30 #include "lmc_debug.h"
  31
  32 #define CONFIG_LMC_IGNORE_HARDWARE_HANDSHAKE 1
  33
  34  /*
  35   * Copyright (c) 1997-2000 LAN Media Corporation (LMC)
  36   * All rights reserved.  www.lanmedia.com
  37   *
  38   * This code is written by:
  39   * Andrew Stanley-Jones (asj@cban.com)
  40   * Rob Braun (bbraun@vix.com),
  41   * Michael Graff (explorer@vix.com) and
  42   * Matt Thomas (matt@3am-software.com).
  43   *
  44   * This software may be used and distributed according to the terms
  45   * of the GNU General Public License version 2, incorporated herein by reference.
  46   */
  47
  48 /*
  49  * protocol independent method.
  50  */
  51 static void lmc_set_protocol (lmc_softc_t * const, lmc_ctl_t *);
  52
  53 /*
  54  * media independent methods to check on media status, link, light LEDs,
  55  * etc.
  56  */
  57 static void lmc_ds3_init (lmc_softc_t * const);
  58 static void lmc_ds3_default (lmc_softc_t * const);
  59 static void lmc_ds3_set_status (lmc_softc_t * const, lmc_ctl_t *);
  60 static void lmc_ds3_set_100ft (lmc_softc_t * const, int);
  61 static int lmc_ds3_get_link_status (lmc_softc_t * const);
  62 static void lmc_ds3_set_crc_length (lmc_softc_t * const, int);
  63 static void lmc_ds3_set_scram (lmc_softc_t * const, int);
  64 static void lmc_ds3_watchdog (lmc_softc_t * const);
  65
  66 static void lmc_hssi_init (lmc_softc_t * const);
  67 static void lmc_hssi_default (lmc_softc_t * const);
  68 static void lmc_hssi_set_status (lmc_softc_t * const, lmc_ctl_t *);
  69 static void lmc_hssi_set_clock (lmc_softc_t * const, int);
  70 static int lmc_hssi_get_link_status (lmc_softc_t * const);
  71 static void lmc_hssi_set_link_status (lmc_softc_t * const, int);
  72 static void lmc_hssi_set_crc_length (lmc_softc_t * const, int);
  73 static void lmc_hssi_watchdog (lmc_softc_t * const);
  74
  75 static void lmc_ssi_init (lmc_softc_t * const);
  76 static void lmc_ssi_default (lmc_softc_t * const);
  77 static void lmc_ssi_set_status (lmc_softc_t * const, lmc_ctl_t *);
  78 static void lmc_ssi_set_clock (lmc_softc_t * const, int);
  79 static void lmc_ssi_set_speed (lmc_softc_t * const, lmc_ctl_t *);
  80 static int lmc_ssi_get_link_status (lmc_softc_t * const);
  81 static void lmc_ssi_set_link_status (lmc_softc_t * const, int);
  82 static void lmc_ssi_set_crc_length (lmc_softc_t * const, int);
  83 static void lmc_ssi_watchdog (lmc_softc_t * const);
  84
  85 static void lmc_t1_init (lmc_softc_t * const);
  86 static void lmc_t1_default (lmc_softc_t * const);
  87 static void lmc_t1_set_status (lmc_softc_t * const, lmc_ctl_t *);
  88 static int lmc_t1_get_link_status (lmc_softc_t * const);
  89 static void lmc_t1_set_circuit_type (lmc_softc_t * const, int);
  90 static void lmc_t1_set_crc_length (lmc_softc_t * const, int);
  91 static void lmc_t1_set_clock (lmc_softc_t * const, int);
  92 static void lmc_t1_watchdog (lmc_softc_t * const);
  93
  94 static void lmc_dummy_set_1 (lmc_softc_t * const, int);
  95 static void lmc_dummy_set2_1 (lmc_softc_t * const, lmc_ctl_t *);
  96
  97 static inline void write_av9110_bit (lmc_softc_t *, int);
  98 static void write_av9110 (lmc_softc_t *, u_int32_t, u_int32_t, u_int32_t,
  99                           u_int32_t, u_int32_t);
 100
 101 lmc_media_t lmc_ds3_media = {
 102   lmc_ds3_init,                 /* special media init stuff */
 103   lmc_ds3_default,              /* reset to default state */
 104   lmc_ds3_set_status,           /* reset status to state provided */
 105   lmc_dummy_set_1,              /* set clock source */
 106   lmc_dummy_set2_1,             /* set line speed */
 107   lmc_ds3_set_100ft,            /* set cable length */
 108   lmc_ds3_set_scram,            /* set scrambler */
 109   lmc_ds3_get_link_status,      /* get link status */
 110   lmc_dummy_set_1,              /* set link status */
 111   lmc_ds3_set_crc_length,       /* set CRC length */
 112   lmc_dummy_set_1,              /* set T1 or E1 circuit type */
 113   lmc_ds3_watchdog
 114 };
 115
 116 lmc_media_t lmc_hssi_media = {
 117   lmc_hssi_init,                /* special media init stuff */
 118   lmc_hssi_default,             /* reset to default state */
 119   lmc_hssi_set_status,          /* reset status to state provided */
 120   lmc_hssi_set_clock,           /* set clock source */
 121   lmc_dummy_set2_1,             /* set line speed */
 122   lmc_dummy_set_1,              /* set cable length */
 123   lmc_dummy_set_1,              /* set scrambler */
 124   lmc_hssi_get_link_status,     /* get link status */
 125   lmc_hssi_set_link_status,     /* set link status */
 126   lmc_hssi_set_crc_length,      /* set CRC length */
 127   lmc_dummy_set_1,              /* set T1 or E1 circuit type */
 128   lmc_hssi_watchdog
 129 };
 130
 131 lmc_media_t lmc_ssi_media = { lmc_ssi_init,     /* special media init stuff */
 132   lmc_ssi_default,              /* reset to default state */
 133   lmc_ssi_set_status,           /* reset status to state provided */
 134   lmc_ssi_set_clock,            /* set clock source */
 135   lmc_ssi_set_speed,            /* set line speed */
 136   lmc_dummy_set_1,              /* set cable length */
 137   lmc_dummy_set_1,              /* set scrambler */
 138   lmc_ssi_get_link_status,      /* get link status */
 139   lmc_ssi_set_link_status,      /* set link status */
 140   lmc_ssi_set_crc_length,       /* set CRC length */
 141   lmc_dummy_set_1,              /* set T1 or E1 circuit type */
 142   lmc_ssi_watchdog
 143 };
 144
 145 lmc_media_t lmc_t1_media = {
 146   lmc_t1_init,                  /* special media init stuff */
 147   lmc_t1_default,               /* reset to default state */
 148   lmc_t1_set_status,            /* reset status to state provided */
 149   lmc_t1_set_clock,             /* set clock source */
 150   lmc_dummy_set2_1,             /* set line speed */
 151   lmc_dummy_set_1,              /* set cable length */
 152   lmc_dummy_set_1,              /* set scrambler */
 153   lmc_t1_get_link_status,       /* get link status */
 154   lmc_dummy_set_1,              /* set link status */
 155   lmc_t1_set_crc_length,        /* set CRC length */
 156   lmc_t1_set_circuit_type,      /* set T1 or E1 circuit type */
 157   lmc_t1_watchdog
 158 };
 159
 160 static void
 161 lmc_dummy_set_1 (lmc_softc_t * const sc, int a)
 162 {
 163 }
 164
 165 static void
 166 lmc_dummy_set2_1 (lmc_softc_t * const sc, lmc_ctl_t * a)
 167 {
 168 }
 169
 170 /*
 171  *  HSSI methods
 172  */
 173
 174 static void
 175 lmc_hssi_init (lmc_softc_t * const sc)
 176 {
 177   sc->ictl.cardtype = LMC_CTL_CARDTYPE_LMC5200;
 178
 179   lmc_gpio_mkoutput (sc, LMC_GEP_HSSI_CLOCK);
 180 }
 181
 182 static void
 183 lmc_hssi_default (lmc_softc_t * const sc)
 184 {
 185   sc->lmc_miireg16 = LMC_MII16_LED_ALL;
 186
 187   sc->lmc_media->set_link_status (sc, LMC_LINK_DOWN);
 188   sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_EXT);
 189   sc->lmc_media->set_crc_length (sc, LMC_CTL_CRC_LENGTH_16);
 190 }
 191
 192 /*
 193  * Given a user provided state, set ourselves up to match it.  This will
 194  * always reset the card if needed.
 195  */
 196 static void
 197 lmc_hssi_set_status (lmc_softc_t * const sc, lmc_ctl_t * ctl)
 198 {
 199   if (ctl == NULL)
 200     {
 201       sc->lmc_media->set_clock_source (sc, sc->ictl.clock_source);
 202       lmc_set_protocol (sc, NULL);
 203
 204       return;
 205     }
 206
 207   /*
 208    * check for change in clock source
 209    */
 210   if (ctl->clock_source && !sc->ictl.clock_source)
 211     {
 212       sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_INT);
 213       sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_INT;
 214     }
 215   else if (!ctl->clock_source && sc->ictl.clock_source)
 216     {
 217       sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_EXT;
 218       sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_EXT);
 219     }
 220
 221   lmc_set_protocol (sc, ctl);
 222 }
 223
 224 /*
 225  * 1 == internal, 0 == external
 226  */
 227 static void
 228 lmc_hssi_set_clock (lmc_softc_t * const sc, int ie)
 229 {
 230   int old;
 231   old = sc->ictl.clock_source;
 232   if (ie == LMC_CTL_CLOCK_SOURCE_EXT)
 233     {
 234       sc->lmc_gpio |= LMC_GEP_HSSI_CLOCK;
 235       LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
 236       sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_EXT;
 237       if(old != ie)
 238         printk (LMC_PRINTF_FMT ": clock external\n", LMC_PRINTF_ARGS);
 239     }
 240   else
 241     {
 242       sc->lmc_gpio &= ~(LMC_GEP_HSSI_CLOCK);
 243       LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
 244       sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_INT;
 245       if(old != ie)
 246         printk (LMC_PRINTF_FMT ": clock internal\n", LMC_PRINTF_ARGS);
 247     }
 248 }
 249
 250 /*
 251  * return hardware link status.
 252  * 0 == link is down, 1 == link is up.
 253  */
 254 static int
 255 lmc_hssi_get_link_status (lmc_softc_t * const sc)
 256 {
 257     /*
 258      * We're using the same code as SSI since
 259      * they're practically the same
 260      */
 261     return lmc_ssi_get_link_status(sc);
 262 }
 263
 264 static void
 265 lmc_hssi_set_link_status (lmc_softc_t * const sc, int state)
 266 {
 267   if (state == LMC_LINK_UP)
 268     sc->lmc_miireg16 |= LMC_MII16_HSSI_TA;
 269   else
 270     sc->lmc_miireg16 &= ~LMC_MII16_HSSI_TA;
 271
 272   lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
 273 }
 274
 275 /*
 276  * 0 == 16bit, 1 == 32bit
 277  */
 278 static void
 279 lmc_hssi_set_crc_length (lmc_softc_t * const sc, int state)
 280 {
 281   if (state == LMC_CTL_CRC_LENGTH_32)
 282     {
 283       /* 32 bit */
 284       sc->lmc_miireg16 |= LMC_MII16_HSSI_CRC;
 285       sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_32;
 286     }
 287   else
 288     {
 289       /* 16 bit */
 290       sc->lmc_miireg16 &= ~LMC_MII16_HSSI_CRC;
 291       sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_16;
 292     }
 293
 294   lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
 295 }
 296
 297 static void
 298 lmc_hssi_watchdog (lmc_softc_t * const sc)
 299 {
 300   /* HSSI is blank */
 301 }
 302
 303 /*
 304  *  DS3 methods
 305  */
 306
 307 /*
 308  * Set cable length
 309  */
 310 static void
 311 lmc_ds3_set_100ft (lmc_softc_t * const sc, int ie)
 312 {
 313   if (ie == LMC_CTL_CABLE_LENGTH_GT_100FT)
 314     {
 315       sc->lmc_miireg16 &= ~LMC_MII16_DS3_ZERO;
 316       sc->ictl.cable_length = LMC_CTL_CABLE_LENGTH_GT_100FT;
 317     }
 318   else if (ie == LMC_CTL_CABLE_LENGTH_LT_100FT)
 319     {
 320       sc->lmc_miireg16 |= LMC_MII16_DS3_ZERO;
 321       sc->ictl.cable_length = LMC_CTL_CABLE_LENGTH_LT_100FT;
 322     }
 323   lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
 324 }
 325
 326 static void
 327 lmc_ds3_default (lmc_softc_t * const sc)
 328 {
 329   sc->lmc_miireg16 = LMC_MII16_LED_ALL;
 330
 331   sc->lmc_media->set_link_status (sc, LMC_LINK_DOWN);
 332   sc->lmc_media->set_cable_length (sc, LMC_CTL_CABLE_LENGTH_LT_100FT);
 333   sc->lmc_media->set_scrambler (sc, LMC_CTL_OFF);
 334   sc->lmc_media->set_crc_length (sc, LMC_CTL_CRC_LENGTH_16);
 335 }
 336
 337 /*
 338  * Given a user provided state, set ourselves up to match it.  This will
 339  * always reset the card if needed.
 340  */
 341 static void
 342 lmc_ds3_set_status (lmc_softc_t * const sc, lmc_ctl_t * ctl)
 343 {
 344   if (ctl == NULL)
 345     {
 346       sc->lmc_media->set_cable_length (sc, sc->ictl.cable_length);
 347       sc->lmc_media->set_scrambler (sc, sc->ictl.scrambler_onoff);
 348       lmc_set_protocol (sc, NULL);
 349
 350       return;
 351     }
 352
 353   /*
 354    * check for change in cable length setting
 355    */
 356   if (ctl->cable_length && !sc->ictl.cable_length)
 357     lmc_ds3_set_100ft (sc, LMC_CTL_CABLE_LENGTH_GT_100FT);
 358   else if (!ctl->cable_length && sc->ictl.cable_length)
 359     lmc_ds3_set_100ft (sc, LMC_CTL_CABLE_LENGTH_LT_100FT);
 360
 361   /*
 362    * Check for change in scrambler setting (requires reset)
 363    */
 364   if (ctl->scrambler_onoff && !sc->ictl.scrambler_onoff)
 365     lmc_ds3_set_scram (sc, LMC_CTL_ON);
 366   else if (!ctl->scrambler_onoff && sc->ictl.scrambler_onoff)
 367     lmc_ds3_set_scram (sc, LMC_CTL_OFF);
 368
 369   lmc_set_protocol (sc, ctl);
 370 }
 371
 372 static void
 373 lmc_ds3_init (lmc_softc_t * const sc)
 374 {
 375   int i;
 376
 377   sc->ictl.cardtype = LMC_CTL_CARDTYPE_LMC5245;
 378
 379   /* writes zeros everywhere */
 380   for (i = 0; i < 21; i++)
 381     {
 382       lmc_mii_writereg (sc, 0, 17, i);
 383       lmc_mii_writereg (sc, 0, 18, 0);
 384     }
 385
 386   /* set some essential bits */
 387   lmc_mii_writereg (sc, 0, 17, 1);
 388   lmc_mii_writereg (sc, 0, 18, 0x25);   /* ser, xtx */
 389
 390   lmc_mii_writereg (sc, 0, 17, 5);
 391   lmc_mii_writereg (sc, 0, 18, 0x80);   /* emode */
 392
 393   lmc_mii_writereg (sc, 0, 17, 14);
 394   lmc_mii_writereg (sc, 0, 18, 0x30);   /* rcgen, tcgen */
 395
 396   /* clear counters and latched bits */
 397   for (i = 0; i < 21; i++)
 398     {
 399       lmc_mii_writereg (sc, 0, 17, i);
 400       lmc_mii_readreg (sc, 0, 18);
 401     }
 402 }
 403
 404 /*
 405  * 1 == DS3 payload scrambled, 0 == not scrambled
 406  */
 407 static void
 408 lmc_ds3_set_scram (lmc_softc_t * const sc, int ie)
 409 {
 410   if (ie == LMC_CTL_ON)
 411     {
 412       sc->lmc_miireg16 |= LMC_MII16_DS3_SCRAM;
 413       sc->ictl.scrambler_onoff = LMC_CTL_ON;
 414     }
 415   else
 416     {
 417       sc->lmc_miireg16 &= ~LMC_MII16_DS3_SCRAM;
 418       sc->ictl.scrambler_onoff = LMC_CTL_OFF;
 419     }
 420   lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
 421 }
 422
 423 /*
 424  * return hardware link status.
 425  * 0 == link is down, 1 == link is up.
 426  */
 427 static int
 428 lmc_ds3_get_link_status (lmc_softc_t * const sc)
 429 {
 430     u_int16_t link_status, link_status_11;
 431     int ret = 1;
 432
 433     lmc_mii_writereg (sc, 0, 17, 7);
 434     link_status = lmc_mii_readreg (sc, 0, 18);
 435
 436     /* LMC5245 (DS3) & LMC1200 (DS1) LED definitions
 437      * led0 yellow = far-end adapter is in Red alarm condition
 438      * led1 blue   = received an Alarm Indication signal
 439      *               (upstream failure)
 440      * led2 Green  = power to adapter, Gate Array loaded & driver
 441      *               attached
 442      * led3 red    = Loss of Signal (LOS) or out of frame (OOF)
 443      *               conditions detected on T3 receive signal
 444      */
 445
 446     lmc_led_on(sc, LMC_DS3_LED2);
 447
 448     if ((link_status & LMC_FRAMER_REG0_DLOS) ||
 449         (link_status & LMC_FRAMER_REG0_OOFS)){
 450         ret = 0;
 451         if(sc->last_led_err[3] != 1){
 452             u16 r1;
 453             lmc_mii_writereg (sc, 0, 17, 01); /* Turn on Xbit error as our cisco does */
 454             r1 = lmc_mii_readreg (sc, 0, 18);
 455             r1 &= 0xfe;
 456             lmc_mii_writereg(sc, 0, 18, r1);
 457             printk(KERN_WARNING "%s: Red Alarm - Loss of Signal or Loss of Framing\n", sc->name);
 458         }
 459         lmc_led_on(sc, LMC_DS3_LED3);   /* turn on red LED */
 460         sc->last_led_err[3] = 1;
 461     }
 462     else {
 463         lmc_led_off(sc, LMC_DS3_LED3);  /* turn on red LED */
 464         if(sc->last_led_err[3] == 1){
 465             u16 r1;
 466             lmc_mii_writereg (sc, 0, 17, 01); /* Turn off Xbit error */
 467             r1 = lmc_mii_readreg (sc, 0, 18);
 468             r1 |= 0x01;
 469             lmc_mii_writereg(sc, 0, 18, r1);
 470         }
 471         sc->last_led_err[3] = 0;
 472     }
 473
 474     lmc_mii_writereg(sc, 0, 17, 0x10);
 475     link_status_11 = lmc_mii_readreg(sc, 0, 18);
 476     if((link_status & LMC_FRAMER_REG0_AIS) ||
 477        (link_status_11 & LMC_FRAMER_REG10_XBIT)) {
 478         ret = 0;
 479         if(sc->last_led_err[0] != 1){
 480             printk(KERN_WARNING "%s: AIS Alarm or XBit Error\n", sc->name);
 481             printk(KERN_WARNING "%s: Remote end has loss of signal or framing\n", sc->name);
 482         }
 483         lmc_led_on(sc, LMC_DS3_LED0);
 484         sc->last_led_err[0] = 1;
 485     }
 486     else {
 487         lmc_led_off(sc, LMC_DS3_LED0);
 488         sc->last_led_err[0] = 0;
 489     }
 490
 491     lmc_mii_writereg (sc, 0, 17, 9);
 492     link_status = lmc_mii_readreg (sc, 0, 18);
 493
 494     if(link_status & LMC_FRAMER_REG9_RBLUE){
 495         ret = 0;
 496         if(sc->last_led_err[1] != 1){
 497             printk(KERN_WARNING "%s: Blue Alarm - Receiving all 1's\n", sc->name);
 498         }
 499         lmc_led_on(sc, LMC_DS3_LED1);
 500         sc->last_led_err[1] = 1;
 501     }
 502     else {
 503         lmc_led_off(sc, LMC_DS3_LED1);
 504         sc->last_led_err[1] = 0;
 505     }
 506
 507     return ret;
 508 }
 509
 510 /*
 511  * 0 == 16bit, 1 == 32bit
 512  */
 513 static void
 514 lmc_ds3_set_crc_length (lmc_softc_t * const sc, int state)
 515 {
 516   if (state == LMC_CTL_CRC_LENGTH_32)
 517     {
 518       /* 32 bit */
 519       sc->lmc_miireg16 |= LMC_MII16_DS3_CRC;
 520       sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_32;
 521     }
 522   else
 523     {
 524       /* 16 bit */
 525       sc->lmc_miireg16 &= ~LMC_MII16_DS3_CRC;
 526       sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_16;
 527     }
 528
 529   lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
 530 }
 531
 532 static void
 533 lmc_ds3_watchdog (lmc_softc_t * const sc)
 534 {
 535
 536 }
 537
 538
 539 /*
 540  *  SSI methods
 541  */
 542
 543 static void
 544 lmc_ssi_init (lmc_softc_t * const sc)
 545 {
 546   u_int16_t mii17;
 547   int cable;
 548
 549   sc->ictl.cardtype = LMC_CTL_CARDTYPE_LMC1000;
 550
 551   mii17 = lmc_mii_readreg (sc, 0, 17);
 552
 553   cable = (mii17 & LMC_MII17_SSI_CABLE_MASK) >> LMC_MII17_SSI_CABLE_SHIFT;
 554   sc->ictl.cable_type = cable;
 555
 556   lmc_gpio_mkoutput (sc, LMC_GEP_SSI_TXCLOCK);
 557 }
 558
 559 static void
 560 lmc_ssi_default (lmc_softc_t * const sc)
 561 {
 562   sc->lmc_miireg16 = LMC_MII16_LED_ALL;
 563
 564   /*
 565    * make TXCLOCK always be an output
 566    */
 567   lmc_gpio_mkoutput (sc, LMC_GEP_SSI_TXCLOCK);
 568
 569   sc->lmc_media->set_link_status (sc, LMC_LINK_DOWN);
 570   sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_EXT);
 571   sc->lmc_media->set_speed (sc, NULL);
 572   sc->lmc_media->set_crc_length (sc, LMC_CTL_CRC_LENGTH_16);
 573 }
 574
 575 /*
 576  * Given a user provided state, set ourselves up to match it.  This will
 577  * always reset the card if needed.
 578  */
 579 static void
 580 lmc_ssi_set_status (lmc_softc_t * const sc, lmc_ctl_t * ctl)
 581 {
 582   if (ctl == NULL)
 583     {
 584       sc->lmc_media->set_clock_source (sc, sc->ictl.clock_source);
 585       sc->lmc_media->set_speed (sc, &sc->ictl);
 586       lmc_set_protocol (sc, NULL);
 587
 588       return;
 589     }
 590
 591   /*
 592    * check for change in clock source
 593    */
 594   if (ctl->clock_source == LMC_CTL_CLOCK_SOURCE_INT
 595       && sc->ictl.clock_source == LMC_CTL_CLOCK_SOURCE_EXT)
 596     {
 597       sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_INT);
 598       sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_INT;
 599     }
 600   else if (ctl->clock_source == LMC_CTL_CLOCK_SOURCE_EXT
 601            && sc->ictl.clock_source == LMC_CTL_CLOCK_SOURCE_INT)
 602     {
 603       sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_EXT);
 604       sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_EXT;
 605     }
 606
 607   if (ctl->clock_rate != sc->ictl.clock_rate)
 608     sc->lmc_media->set_speed (sc, ctl);
 609
 610   lmc_set_protocol (sc, ctl);
 611 }
 612
 613 /*
 614  * 1 == internal, 0 == external
 615  */
 616 static void
 617 lmc_ssi_set_clock (lmc_softc_t * const sc, int ie)
 618 {
 619   int old;
 620   old = ie;
 621   if (ie == LMC_CTL_CLOCK_SOURCE_EXT)
 622     {
 623       sc->lmc_gpio &= ~(LMC_GEP_SSI_TXCLOCK);
 624       LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
 625       sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_EXT;
 626       if(ie != old)
 627         printk (LMC_PRINTF_FMT ": clock external\n", LMC_PRINTF_ARGS);
 628     }
 629   else
 630     {
 631       sc->lmc_gpio |= LMC_GEP_SSI_TXCLOCK;
 632       LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
 633       sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_INT;
 634       if(ie != old)
 635         printk (LMC_PRINTF_FMT ": clock internal\n", LMC_PRINTF_ARGS);
 636     }
 637 }
 638
 639 static void
 640 lmc_ssi_set_speed (lmc_softc_t * const sc, lmc_ctl_t * ctl)
 641 {
 642   lmc_ctl_t *ictl = &sc->ictl;
 643   lmc_av9110_t *av;
 644
 645   /* original settings for clock rate of:
 646    *  100 Khz (8,25,0,0,2) were incorrect
 647    *  they should have been 80,125,1,3,3
 648    *  There are 17 param combinations to produce this freq.
 649    *  For 1.5 Mhz use 120,100,1,1,2 (226 param. combinations)
 650    */
 651   if (ctl == NULL)
 652     {
 653       av = &ictl->cardspec.ssi;
 654       ictl->clock_rate = 1500000;
 655       av->f = ictl->clock_rate;
 656       av->n = 120;
 657       av->m = 100;
 658       av->v = 1;
 659       av->x = 1;
 660       av->r = 2;
 661
 662       write_av9110 (sc, av->n, av->m, av->v, av->x, av->r);
 663       return;
 664     }
 665
 666   av = &ctl->cardspec.ssi;
 667
 668   if (av->f == 0)
 669     return;
 670
 671   ictl->clock_rate = av->f;     /* really, this is the rate we are */
 672   ictl->cardspec.ssi = *av;
 673
 674   write_av9110 (sc, av->n, av->m, av->v, av->x, av->r);
 675 }
 676
 677 /*
 678  * return hardware link status.
 679  * 0 == link is down, 1 == link is up.
 680  */
 681 static int
 682 lmc_ssi_get_link_status (lmc_softc_t * const sc)
 683 {
 684   u_int16_t link_status;
 685   u_int32_t ticks;
 686   int ret = 1;
 687   int hw_hdsk = 1;
 688
 689   /*
 690    * missing CTS?  Hmm.  If we require CTS on, we may never get the
 691    * link to come up, so omit it in this test.
 692    *
 693    * Also, it seems that with a loopback cable, DCD isn't asserted,
 694    * so just check for things like this:
 695    *      DSR _must_ be asserted.
 696    *      One of DCD or CTS must be asserted.
 697    */
 698
 699   /* LMC 1000 (SSI) LED definitions
 700    * led0 Green = power to adapter, Gate Array loaded &
 701    *              driver attached
 702    * led1 Green = DSR and DTR and RTS and CTS are set
 703    * led2 Green = Cable detected
 704    * led3 red   = No timing is available from the
 705    *              cable or the on-board frequency
 706    *              generator.
 707    */
 708
 709   link_status = lmc_mii_readreg (sc, 0, 16);
 710
 711   /* Is the transmit clock still available */
 712   ticks = LMC_CSR_READ (sc, csr_gp_timer);
 713   ticks = 0x0000ffff - (ticks & 0x0000ffff);
 714
 715   lmc_led_on (sc, LMC_MII16_LED0);
 716
 717   /* ====== transmit clock determination ===== */
 718   if (sc->lmc_timing == LMC_CTL_CLOCK_SOURCE_INT) {
 719       lmc_led_off(sc, LMC_MII16_LED3);
 720   }
 721   else if (ticks == 0 ) {                               /* no clock found ? */
 722       ret = 0;
 723       if(sc->last_led_err[3] != 1){
 724           sc->stats.tx_lossOfClockCnt++;
 725           printk(KERN_WARNING "%s: Lost Clock, Link Down\n", sc->name);
 726       }
 727       sc->last_led_err[3] = 1;
 728       lmc_led_on (sc, LMC_MII16_LED3);  /* turn ON red LED */
 729   }
 730   else {
 731       if(sc->last_led_err[3] == 1)
 732           printk(KERN_WARNING "%s: Clock Returned\n", sc->name);
 733       sc->last_led_err[3] = 0;
 734       lmc_led_off (sc, LMC_MII16_LED3);         /* turn OFF red LED */
 735   }
 736
 737   if ((link_status & LMC_MII16_SSI_DSR) == 0) { /* Also HSSI CA */
 738       ret = 0;
 739       hw_hdsk = 0;
 740   }
 741
 742 #ifdef CONFIG_LMC_IGNORE_HARDWARE_HANDSHAKE
 743   if ((link_status & (LMC_MII16_SSI_CTS | LMC_MII16_SSI_DCD)) == 0){
 744       ret = 0;
 745       hw_hdsk = 0;
 746   }
 747 #endif
 748
 749   if(hw_hdsk == 0){
 750       if(sc->last_led_err[1] != 1)
 751           printk(KERN_WARNING "%s: DSR not asserted\n", sc->name);
 752       sc->last_led_err[1] = 1;
 753       lmc_led_off(sc, LMC_MII16_LED1);
 754   }
 755   else {
 756       if(sc->last_led_err[1] != 0)
 757           printk(KERN_WARNING "%s: DSR now asserted\n", sc->name);
 758       sc->last_led_err[1] = 0;
 759       lmc_led_on(sc, LMC_MII16_LED1);
 760   }
 761
 762   if(ret == 1) {
 763       lmc_led_on(sc, LMC_MII16_LED2); /* Over all good status? */
 764   }
 765
 766   return ret;
 767 }
 768
 769 static void
 770 lmc_ssi_set_link_status (lmc_softc_t * const sc, int state)
 771 {
 772   if (state == LMC_LINK_UP)
 773     {
 774       sc->lmc_miireg16 |= (LMC_MII16_SSI_DTR | LMC_MII16_SSI_RTS);
 775       printk (LMC_PRINTF_FMT ": asserting DTR and RTS\n", LMC_PRINTF_ARGS);
 776     }
 777   else
 778     {
 779       sc->lmc_miireg16 &= ~(LMC_MII16_SSI_DTR | LMC_MII16_SSI_RTS);
 780       printk (LMC_PRINTF_FMT ": deasserting DTR and RTS\n", LMC_PRINTF_ARGS);
 781     }
 782
 783   lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
 784
 785 }
 786
 787 /*
 788  * 0 == 16bit, 1 == 32bit
 789  */
 790 static void
 791 lmc_ssi_set_crc_length (lmc_softc_t * const sc, int state)
 792 {
 793   if (state == LMC_CTL_CRC_LENGTH_32)
 794     {
 795       /* 32 bit */
 796       sc->lmc_miireg16 |= LMC_MII16_SSI_CRC;
 797       sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_32;
 798       sc->lmc_crcSize = LMC_CTL_CRC_BYTESIZE_4;
 799
 800     }
 801   else
 802     {
 803       /* 16 bit */
 804       sc->lmc_miireg16 &= ~LMC_MII16_SSI_CRC;
 805       sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_16;
 806       sc->lmc_crcSize = LMC_CTL_CRC_BYTESIZE_2;
 807     }
 808
 809   lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
 810 }
 811
 812 /*
 813  * These are bits to program the ssi frequency generator
 814  */
 815 static inline void
 816 write_av9110_bit (lmc_softc_t * sc, int c)
 817 {
 818   /*
 819    * set the data bit as we need it.
 820    */
 821   sc->lmc_gpio &= ~(LMC_GEP_CLK);
 822   if (c & 0x01)
 823     sc->lmc_gpio |= LMC_GEP_DATA;
 824   else
 825     sc->lmc_gpio &= ~(LMC_GEP_DATA);
 826   LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
 827
 828   /*
 829    * set the clock to high
 830    */
 831   sc->lmc_gpio |= LMC_GEP_CLK;
 832   LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
 833
 834   /*
 835    * set the clock to low again.
 836    */
 837   sc->lmc_gpio &= ~(LMC_GEP_CLK);
 838   LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
 839 }
 840
 841 static void
 842 write_av9110 (lmc_softc_t * sc, u_int32_t n, u_int32_t m, u_int32_t v,
 843               u_int32_t x, u_int32_t r)
 844 {
 845   int i;
 846
 847 #if 0
 848   printk (LMC_PRINTF_FMT ": speed %u, %d %d %d %d %d\n",
 849           LMC_PRINTF_ARGS, sc->ictl.clock_rate, n, m, v, x, r);
 850 #endif
 851
 852   sc->lmc_gpio |= LMC_GEP_SSI_GENERATOR;
 853   sc->lmc_gpio &= ~(LMC_GEP_DATA | LMC_GEP_CLK);
 854   LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
 855
 856   /*
 857    * Set the TXCLOCK, GENERATOR, SERIAL, and SERIALCLK
 858    * as outputs.
 859    */
 860   lmc_gpio_mkoutput (sc, (LMC_GEP_DATA | LMC_GEP_CLK
 861                           | LMC_GEP_SSI_GENERATOR));
 862
 863   sc->lmc_gpio &= ~(LMC_GEP_SSI_GENERATOR);
 864   LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
 865
 866   /*
 867    * a shifting we will go...
 868    */
 869   for (i = 0; i < 7; i++)
 870     write_av9110_bit (sc, n >> i);
 871   for (i = 0; i < 7; i++)
 872     write_av9110_bit (sc, m >> i);
 873   for (i = 0; i < 1; i++)
 874     write_av9110_bit (sc, v >> i);
 875   for (i = 0; i < 2; i++)
 876     write_av9110_bit (sc, x >> i);
 877   for (i = 0; i < 2; i++)
 878     write_av9110_bit (sc, r >> i);
 879   for (i = 0; i < 5; i++)
 880     write_av9110_bit (sc, 0x17 >> i);
 881
 882   /*
 883    * stop driving serial-related signals
 884    */
 885   lmc_gpio_mkinput (sc,
 886                     (LMC_GEP_DATA | LMC_GEP_CLK
 887                      | LMC_GEP_SSI_GENERATOR));
 888 }
 889
 890 static void
 891 lmc_ssi_watchdog (lmc_softc_t * const sc)
 892 {
 893   u_int16_t mii17;
 894   struct ssicsr2
 895   {
 896     unsigned short dtr:1, dsr:1, rts:1, cable:3, crc:1, led0:1, led1:1,
 897       led2:1, led3:1, fifo:1, ll:1, rl:1, tm:1, loop:1;
 898   };
 899   struct ssicsr2 *ssicsr;
 900   mii17 = lmc_mii_readreg (sc, 0, 17);
 901   ssicsr = (struct ssicsr2 *) &mii17;
 902   if (ssicsr->cable == 7)
 903     {
 904       lmc_led_off (sc, LMC_MII16_LED2);
 905     }
 906   else
 907     {
 908       lmc_led_on (sc, LMC_MII16_LED2);
 909     }
 910
 911 }
 912
 913 /*
 914  *  T1 methods
 915  */
 916
 917 /*
 918  * The framer regs are multiplexed through MII regs 17 & 18
 919  *  write the register address to MII reg 17 and the *  data to MII reg 18. */
 920 static void
 921 lmc_t1_write (lmc_softc_t * const sc, int a, int d)
 922 {
 923   lmc_mii_writereg (sc, 0, 17, a);
 924   lmc_mii_writereg (sc, 0, 18, d);
 925 }
 926
 927 /* Save a warning
 928 static int
 929 lmc_t1_read (lmc_softc_t * const sc, int a)
 930 {
 931   lmc_mii_writereg (sc, 0, 17, a);
 932   return lmc_mii_readreg (sc, 0, 18);
 933 }
 934 */
 935
 936
 937 static void
 938 lmc_t1_init (lmc_softc_t * const sc)
 939 {
 940   u_int16_t mii16;
 941   int i;
 942
 943   sc->ictl.cardtype = LMC_CTL_CARDTYPE_LMC1200;
 944   mii16 = lmc_mii_readreg (sc, 0, 16);
 945
 946   /* reset 8370 */
 947   mii16 &= ~LMC_MII16_T1_RST;
 948   lmc_mii_writereg (sc, 0, 16, mii16 | LMC_MII16_T1_RST);
 949   lmc_mii_writereg (sc, 0, 16, mii16);
 950
 951   /* set T1 or E1 line.  Uses sc->lmcmii16 reg in function so update it */
 952   sc->lmc_miireg16 = mii16;
 953   lmc_t1_set_circuit_type(sc, LMC_CTL_CIRCUIT_TYPE_T1);
 954   mii16 = sc->lmc_miireg16;
 955
 956   lmc_t1_write (sc, 0x01, 0x1B);        /* CR0     - primary control             */
 957   lmc_t1_write (sc, 0x02, 0x42);        /* JAT_CR  - jitter atten config         */
 958   lmc_t1_write (sc, 0x14, 0x00);        /* LOOP    - loopback config             */
 959   lmc_t1_write (sc, 0x15, 0x00);        /* DL3_TS  - external data link timeslot */
 960   lmc_t1_write (sc, 0x18, 0xFF);        /* PIO     - programmable I/O            */
 961   lmc_t1_write (sc, 0x19, 0x30);        /* POE     - programmable OE             */
 962   lmc_t1_write (sc, 0x1A, 0x0F);        /* CMUX    - clock input mux             */
 963   lmc_t1_write (sc, 0x20, 0x41);        /* LIU_CR  - RX LIU config               */
 964   lmc_t1_write (sc, 0x22, 0x76);        /* RLIU_CR - RX LIU config               */
 965   lmc_t1_write (sc, 0x40, 0x03);        /* RCR0    - RX config                   */
 966   lmc_t1_write (sc, 0x45, 0x00);        /* RALM    - RX alarm config             */
 967   lmc_t1_write (sc, 0x46, 0x05);        /* LATCH   - RX alarm/err/cntr latch     */
 968   lmc_t1_write (sc, 0x68, 0x40);        /* TLIU_CR - TX LIU config               */
 969   lmc_t1_write (sc, 0x70, 0x0D);        /* TCR0    - TX framer config            */
 970   lmc_t1_write (sc, 0x71, 0x05);        /* TCR1    - TX config                   */
 971   lmc_t1_write (sc, 0x72, 0x0B);        /* TFRM    - TX frame format             */
 972   lmc_t1_write (sc, 0x73, 0x00);        /* TERROR  - TX error insert             */
 973   lmc_t1_write (sc, 0x74, 0x00);        /* TMAN    - TX manual Sa/FEBE config    */
 974   lmc_t1_write (sc, 0x75, 0x00);        /* TALM    - TX alarm signal config      */
 975   lmc_t1_write (sc, 0x76, 0x00);        /* TPATT   - TX test pattern config      */
 976   lmc_t1_write (sc, 0x77, 0x00);        /* TLB     - TX inband loopback config   */
 977   lmc_t1_write (sc, 0x90, 0x05);        /* CLAD_CR - clock rate adapter config   */
 978   lmc_t1_write (sc, 0x91, 0x05);        /* CSEL    - clad freq sel               */
 979   lmc_t1_write (sc, 0xA6, 0x00);        /* DL1_CTL - DL1 control                 */
 980   lmc_t1_write (sc, 0xB1, 0x00);        /* DL2_CTL - DL2 control                 */
 981   lmc_t1_write (sc, 0xD0, 0x47);        /* SBI_CR  - sys bus iface config        */
 982   lmc_t1_write (sc, 0xD1, 0x70);        /* RSB_CR  - RX sys bus config           */
 983   lmc_t1_write (sc, 0xD4, 0x30);        /* TSB_CR  - TX sys bus config           */
 984   for (i = 0; i < 32; i++)
 985     {
 986       lmc_t1_write (sc, 0x0E0 + i, 0x00);       /* SBCn - sys bus per-channel ctl    */
 987       lmc_t1_write (sc, 0x100 + i, 0x00);       /* TPCn - TX per-channel ctl         */
 988       lmc_t1_write (sc, 0x180 + i, 0x00);       /* RPCn - RX per-channel ctl         */
 989     }
 990   for (i = 1; i < 25; i++)
 991     {
 992       lmc_t1_write (sc, 0x0E0 + i, 0x0D);       /* SBCn - sys bus per-channel ctl    */
 993     }
 994
 995   mii16 |= LMC_MII16_T1_XOE;
 996   lmc_mii_writereg (sc, 0, 16, mii16);
 997   sc->lmc_miireg16 = mii16;
 998 }
 999
1000 static void
1001 lmc_t1_default (lmc_softc_t * const sc)
1002 {
1003   sc->lmc_miireg16 = LMC_MII16_LED_ALL;
1004   sc->lmc_media->set_link_status (sc, LMC_LINK_DOWN);
1005   sc->lmc_media->set_circuit_type (sc, LMC_CTL_CIRCUIT_TYPE_T1);
1006   sc->lmc_media->set_crc_length (sc, LMC_CTL_CRC_LENGTH_16);
1007   /* Right now we can only clock from out internal source */
1008   sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_INT;
1009 }
1010 /* * Given a user provided state, set ourselves up to match it.  This will * always reset the card if needed.
1011  */
1012 static void
1013 lmc_t1_set_status (lmc_softc_t * const sc, lmc_ctl_t * ctl)
1014 {
1015   if (ctl == NULL)
1016     {
1017       sc->lmc_media->set_circuit_type (sc, sc->ictl.circuit_type);
1018       lmc_set_protocol (sc, NULL);
1019
1020       return;
1021     }
1022   /*
1023    * check for change in circuit type         */
1024   if (ctl->circuit_type == LMC_CTL_CIRCUIT_TYPE_T1
1025       && sc->ictl.circuit_type ==
1026       LMC_CTL_CIRCUIT_TYPE_E1) sc->lmc_media->set_circuit_type (sc,
1027                                                                 LMC_CTL_CIRCUIT_TYPE_E1);
1028   else if (ctl->circuit_type == LMC_CTL_CIRCUIT_TYPE_E1
1029            && sc->ictl.circuit_type == LMC_CTL_CIRCUIT_TYPE_T1)
1030     sc->lmc_media->set_circuit_type (sc, LMC_CTL_CIRCUIT_TYPE_T1);
1031   lmc_set_protocol (sc, ctl);
1032 }
1033 /*
1034  * return hardware link status.
1035  * 0 == link is down, 1 == link is up.
1036  */ static int
1037 lmc_t1_get_link_status (lmc_softc_t * const sc)
1038 {
1039     u_int16_t link_status;
1040     int ret = 1;
1041
1042   /* LMC5245 (DS3) & LMC1200 (DS1) LED definitions
1043    * led0 yellow = far-end adapter is in Red alarm condition
1044    * led1 blue   = received an Alarm Indication signal
1045    *               (upstream failure)
1046    * led2 Green  = power to adapter, Gate Array loaded & driver
1047    *               attached
1048    * led3 red    = Loss of Signal (LOS) or out of frame (OOF)
1049    *               conditions detected on T3 receive signal
1050    */
1051     lmc_trace(sc->lmc_device, "lmc_t1_get_link_status in");
1052     lmc_led_on(sc, LMC_DS3_LED2);
1053
1054     lmc_mii_writereg (sc, 0, 17, T1FRAMER_ALARM1_STATUS);
1055     link_status = lmc_mii_readreg (sc, 0, 18);
1056
1057
1058     if (link_status & T1F_RAIS) {                       /* turn on blue LED */
1059         ret = 0;
1060         if(sc->last_led_err[1] != 1){
1061             printk(KERN_WARNING "%s: Receive AIS/Blue Alarm. Far end in RED alarm\n", sc->name);
1062         }
1063         lmc_led_on(sc, LMC_DS3_LED1);
1064         sc->last_led_err[1] = 1;
1065     }
1066     else {
1067         if(sc->last_led_err[1] != 0){
1068             printk(KERN_WARNING "%s: End AIS/Blue Alarm\n", sc->name);
1069         }
1070         lmc_led_off (sc, LMC_DS3_LED1);
1071         sc->last_led_err[1] = 0;
1072     }
1073
1074     /*
1075      * Yellow Alarm is nasty evil stuff, looks at data patterns
1076      * inside the channel and confuses it with HDLC framing
1077      * ignore all yellow alarms.
1078      *
1079      * Do listen to MultiFrame Yellow alarm which while implemented
1080      * different ways isn't in the channel and hence somewhat
1081      * more reliable
1082      */
1083
1084     if (link_status & T1F_RMYEL) {
1085         ret = 0;
1086         if(sc->last_led_err[0] != 1){
1087             printk(KERN_WARNING "%s: Receive Yellow AIS Alarm\n", sc->name);
1088         }
1089         lmc_led_on(sc, LMC_DS3_LED0);
1090         sc->last_led_err[0] = 1;
1091     }
1092     else {
1093         if(sc->last_led_err[0] != 0){
1094             printk(KERN_WARNING "%s: End of Yellow AIS Alarm\n", sc->name);
1095         }
1096         lmc_led_off(sc, LMC_DS3_LED0);
1097         sc->last_led_err[0] = 0;
1098     }
1099
1100     /*
1101      * Loss of signal and los of frame
1102      * Use the green bit to identify which one lit the led
1103      */
1104     if(link_status & T1F_RLOF){
1105         ret = 0;
1106         if(sc->last_led_err[3] != 1){
1107             printk(KERN_WARNING "%s: Local Red Alarm: Loss of Framing\n", sc->name);
1108         }
1109         lmc_led_on(sc, LMC_DS3_LED3);
1110         sc->last_led_err[3] = 1;
1111
1112     }
1113     else {
1114         if(sc->last_led_err[3] != 0){
1115             printk(KERN_WARNING "%s: End Red Alarm (LOF)\n", sc->name);
1116         }
1117         if( ! (link_status & T1F_RLOS))
1118             lmc_led_off(sc, LMC_DS3_LED3);
1119         sc->last_led_err[3] = 0;
1120     }
1121
1122     if(link_status & T1F_RLOS){
1123         ret = 0;
1124         if(sc->last_led_err[2] != 1){
1125             printk(KERN_WARNING "%s: Local Red Alarm: Loss of Signal\n", sc->name);
1126         }
1127         lmc_led_on(sc, LMC_DS3_LED3);
1128         sc->last_led_err[2] = 1;
1129
1130     }
1131     else {
1132         if(sc->last_led_err[2] != 0){
1133             printk(KERN_WARNING "%s: End Red Alarm (LOS)\n", sc->name);
1134         }
1135         if( ! (link_status & T1F_RLOF))
1136             lmc_led_off(sc, LMC_DS3_LED3);
1137         sc->last_led_err[2] = 0;
1138     }
1139
1140     sc->lmc_xinfo.t1_alarm1_status = link_status;
1141
1142     lmc_mii_writereg (sc, 0, 17, T1FRAMER_ALARM2_STATUS);
1143     sc->lmc_xinfo.t1_alarm2_status = lmc_mii_readreg (sc, 0, 18);
1144
1145
1146     lmc_trace(sc->lmc_device, "lmc_t1_get_link_status out");
1147
1148     return ret;
1149 }
1150
1151 /*
1152  * 1 == T1 Circuit Type , 0 == E1 Circuit Type
1153  */
1154 static void
1155 lmc_t1_set_circuit_type (lmc_softc_t * const sc, int ie)
1156 {
1157   if (ie == LMC_CTL_CIRCUIT_TYPE_T1) {
1158       sc->lmc_miireg16 |= LMC_MII16_T1_Z;
1159       sc->ictl.circuit_type = LMC_CTL_CIRCUIT_TYPE_T1;
1160       printk(KERN_INFO "%s: In T1 Mode\n", sc->name);
1161   }
1162   else {
1163       sc->lmc_miireg16 &= ~LMC_MII16_T1_Z;
1164       sc->ictl.circuit_type = LMC_CTL_CIRCUIT_TYPE_E1;
1165       printk(KERN_INFO "%s: In E1 Mode\n", sc->name);
1166   }
1167
1168   lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
1169
1170 }
1171
1172 /*
1173  * 0 == 16bit, 1 == 32bit */
1174 static void
1175 lmc_t1_set_crc_length (lmc_softc_t * const sc, int state)
1176 {
1177   if (state == LMC_CTL_CRC_LENGTH_32)
1178     {
1179       /* 32 bit */
1180       sc->lmc_miireg16 |= LMC_MII16_T1_CRC;
1181       sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_32;
1182       sc->lmc_crcSize = LMC_CTL_CRC_BYTESIZE_4;
1183
1184     }
1185   else
1186     {
1187       /* 16 bit */ sc->lmc_miireg16 &= ~LMC_MII16_T1_CRC;
1188       sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_16;
1189       sc->lmc_crcSize = LMC_CTL_CRC_BYTESIZE_2;
1190
1191     }
1192
1193   lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
1194 }
1195
1196 /*
1197  * 1 == internal, 0 == external
1198  */
1199 static void
1200 lmc_t1_set_clock (lmc_softc_t * const sc, int ie)
1201 {
1202   int old;
1203   old = ie;
1204   if (ie == LMC_CTL_CLOCK_SOURCE_EXT)
1205     {
1206       sc->lmc_gpio &= ~(LMC_GEP_SSI_TXCLOCK);
1207       LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
1208       sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_EXT;
1209       if(old != ie)
1210         printk (LMC_PRINTF_FMT ": clock external\n", LMC_PRINTF_ARGS);
1211     }
1212   else
1213     {
1214       sc->lmc_gpio |= LMC_GEP_SSI_TXCLOCK;
1215       LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
1216       sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_INT;
1217       if(old != ie)
1218         printk (LMC_PRINTF_FMT ": clock internal\n", LMC_PRINTF_ARGS);
1219     }
1220 }
1221
1222 static void
1223 lmc_t1_watchdog (lmc_softc_t * const sc)
1224 {
1225 }
1226
1227 static void
1228 lmc_set_protocol (lmc_softc_t * const sc, lmc_ctl_t * ctl)
1229 {
1230   if (ctl == 0)
1231     {
1232       sc->ictl.keepalive_onoff = LMC_CTL_ON;
1233
1234       return;
1235     }
1236 }