lmc_media.c

linux-2.6.15.6

      sc->lmc_miireg16 |= LMC_MII16_DS3_SCRAM;
      sc->ictl.scrambler_onoff = LMC_CTL_ON;
    }
  else
    {
      sc->lmc_miireg16 &= ~LMC_MII16_DS3_SCRAM;
      sc->ictl.scrambler_onoff = LMC_CTL_OFF;
    }
  lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}

/*
 * return hardware link status.
 * 0 == link is down, 1 == link is up.
 */
static int
lmc_ds3_get_link_status (lmc_softc_t * const sc)
{
    u_int16_t link_status, link_status_11;
    int ret = 1;

    lmc_mii_writereg (sc, 0, 17, 7);
    link_status = lmc_mii_readreg (sc, 0, 18);

    /* LMC5245 (DS3) & LMC1200 (DS1) LED definitions
     * led0 yellow = far-end adapter is in Red alarm condition
     * led1 blue   = received an Alarm Indication signal
     *               (upstream failure)
     * led2 Green  = power to adapter, Gate Array loaded & driver
     *               attached
     * led3 red    = Loss of Signal (LOS) or out of frame (OOF)
     *               conditions detected on T3 receive signal
     */

    lmc_led_on(sc, LMC_DS3_LED2);

    if ((link_status & LMC_FRAMER_REG0_DLOS) ||
        (link_status & LMC_FRAMER_REG0_OOFS)){
        ret = 0;
        if(sc->last_led_err[3] != 1){
            u16 r1;
            lmc_mii_writereg (sc, 0, 17, 01); /* Turn on Xbit error as our cisco does */
            r1 = lmc_mii_readreg (sc, 0, 18);
            r1 &= 0xfe;
            lmc_mii_writereg(sc, 0, 18, r1);
            printk(KERN_WARNING "%s: Red Alarm - Loss of Signal or Loss of Framing\n", sc->name);
        }
        lmc_led_on(sc, LMC_DS3_LED3);	/* turn on red LED */
        sc->last_led_err[3] = 1;
    }
    else {
        lmc_led_off(sc, LMC_DS3_LED3);	/* turn on red LED */
        if(sc->last_led_err[3] == 1){
            u16 r1;
            lmc_mii_writereg (sc, 0, 17, 01); /* Turn off Xbit error */
            r1 = lmc_mii_readreg (sc, 0, 18);
            r1 |= 0x01;
            lmc_mii_writereg(sc, 0, 18, r1);
        }
        sc->last_led_err[3] = 0;
    }

    lmc_mii_writereg(sc, 0, 17, 0x10);
    link_status_11 = lmc_mii_readreg(sc, 0, 18);
    if((link_status & LMC_FRAMER_REG0_AIS) ||
       (link_status_11 & LMC_FRAMER_REG10_XBIT)) {
        ret = 0;
        if(sc->last_led_err[0] != 1){
            printk(KERN_WARNING "%s: AIS Alarm or XBit Error\n", sc->name);
            printk(KERN_WARNING "%s: Remote end has loss of signal or framing\n", sc->name);
        }
        lmc_led_on(sc, LMC_DS3_LED0);
        sc->last_led_err[0] = 1;
    }
    else {
        lmc_led_off(sc, LMC_DS3_LED0);
        sc->last_led_err[0] = 0;
    }

    lmc_mii_writereg (sc, 0, 17, 9);
    link_status = lmc_mii_readreg (sc, 0, 18);
    
    if(link_status & LMC_FRAMER_REG9_RBLUE){
        ret = 0;
        if(sc->last_led_err[1] != 1){
            printk(KERN_WARNING "%s: Blue Alarm - Receiving all 1's\n", sc->name);
        }
        lmc_led_on(sc, LMC_DS3_LED1);
        sc->last_led_err[1] = 1;
    }
    else {
        lmc_led_off(sc, LMC_DS3_LED1);
        sc->last_led_err[1] = 0;
    }

    return ret;
}

/*
 * 0 == 16bit, 1 == 32bit
 */
static void
lmc_ds3_set_crc_length (lmc_softc_t * const sc, int state)
{
  if (state == LMC_CTL_CRC_LENGTH_32)
    {
      /* 32 bit */
      sc->lmc_miireg16 |= LMC_MII16_DS3_CRC;
      sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_32;
    }
  else
    {
      /* 16 bit */
      sc->lmc_miireg16 &= ~LMC_MII16_DS3_CRC;
      sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_16;
    }

  lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}

static void
lmc_ds3_watchdog (lmc_softc_t * const sc)
{
    
}


/*
 *  SSI methods
 */

static void
lmc_ssi_init (lmc_softc_t * const sc)
{
  u_int16_t mii17;
  int cable;

  sc->ictl.cardtype = LMC_CTL_CARDTYPE_LMC1000;

  mii17 = lmc_mii_readreg (sc, 0, 17);

  cable = (mii17 & LMC_MII17_SSI_CABLE_MASK) >> LMC_MII17_SSI_CABLE_SHIFT;
  sc->ictl.cable_type = cable;

  lmc_gpio_mkoutput (sc, LMC_GEP_SSI_TXCLOCK);
}

static void
lmc_ssi_default (lmc_softc_t * const sc)
{
  sc->lmc_miireg16 = LMC_MII16_LED_ALL;

  /*
   * make TXCLOCK always be an output
   */
  lmc_gpio_mkoutput (sc, LMC_GEP_SSI_TXCLOCK);

  sc->lmc_media->set_link_status (sc, LMC_LINK_DOWN);
  sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_EXT);
  sc->lmc_media->set_speed (sc, NULL);
  sc->lmc_media->set_crc_length (sc, LMC_CTL_CRC_LENGTH_16);
}

/*
 * Given a user provided state, set ourselves up to match it.  This will
 * always reset the card if needed.
 */
static void
lmc_ssi_set_status (lmc_softc_t * const sc, lmc_ctl_t * ctl)
{
  if (ctl == NULL)
    {
      sc->lmc_media->set_clock_source (sc, sc->ictl.clock_source);
      sc->lmc_media->set_speed (sc, &sc->ictl);
      lmc_set_protocol (sc, NULL);

      return;
    }

  /*
   * check for change in clock source
   */
  if (ctl->clock_source == LMC_CTL_CLOCK_SOURCE_INT
      && sc->ictl.clock_source == LMC_CTL_CLOCK_SOURCE_EXT)
    {
      sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_INT);
      sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_INT;
    }
  else if (ctl->clock_source == LMC_CTL_CLOCK_SOURCE_EXT
	   && sc->ictl.clock_source == LMC_CTL_CLOCK_SOURCE_INT)
    {
      sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_EXT);
      sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_EXT;
    }

  if (ctl->clock_rate != sc->ictl.clock_rate)
    sc->lmc_media->set_speed (sc, ctl);

  lmc_set_protocol (sc, ctl);
}

/*
 * 1 == internal, 0 == external
 */
static void
lmc_ssi_set_clock (lmc_softc_t * const sc, int ie)
{
  int old;
  old = ie;
  if (ie == LMC_CTL_CLOCK_SOURCE_EXT)
    {
      sc->lmc_gpio &= ~(LMC_GEP_SSI_TXCLOCK);
      LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
      sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_EXT;
      if(ie != old)
        printk (LMC_PRINTF_FMT ": clock external\n", LMC_PRINTF_ARGS);
    }
  else
    {
      sc->lmc_gpio |= LMC_GEP_SSI_TXCLOCK;
      LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
      sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_INT;
      if(ie != old)
        printk (LMC_PRINTF_FMT ": clock internal\n", LMC_PRINTF_ARGS);
    }
}

static void
lmc_ssi_set_speed (lmc_softc_t * const sc, lmc_ctl_t * ctl)
{
  lmc_ctl_t *ictl = &sc->ictl;
  lmc_av9110_t *av;

  /* original settings for clock rate of:
   *  100 Khz (8,25,0,0,2) were incorrect
   *  they should have been 80,125,1,3,3
   *  There are 17 param combinations to produce this freq.
   *  For 1.5 Mhz use 120,100,1,1,2 (226 param. combinations)
   */
  if (ctl == NULL)
    {
      av = &ictl->cardspec.ssi;
      ictl->clock_rate = 1500000;
      av->f = ictl->clock_rate;
      av->n = 120;
      av->m = 100;
      av->v = 1;
      av->x = 1;
      av->r = 2;

      write_av9110 (sc, av->n, av->m, av->v, av->x, av->r);
      return;
    }

  av = &ctl->cardspec.ssi;

  if (av->f == 0)
    return;

  ictl->clock_rate = av->f;	/* really, this is the rate we are */
  ictl->cardspec.ssi = *av;

  write_av9110 (sc, av->n, av->m, av->v, av->x, av->r);
}

/*
 * return hardware link status.
 * 0 == link is down, 1 == link is up.
 */
static int
lmc_ssi_get_link_status (lmc_softc_t * const sc)
{
  u_int16_t link_status;
  u_int32_t ticks;
  int ret = 1;
  int hw_hdsk = 1;
  
  /*
   * missing CTS?  Hmm.  If we require CTS on, we may never get the
   * link to come up, so omit it in this test.
   *
   * Also, it seems that with a loopback cable, DCD isn't asserted,
   * so just check for things like this:
   *      DSR _must_ be asserted.
   *      One of DCD or CTS must be asserted.
   */

  /* LMC 1000 (SSI) LED definitions
   * led0 Green = power to adapter, Gate Array loaded &
   *              driver attached
   * led1 Green = DSR and DTR and RTS and CTS are set
   * led2 Green = Cable detected
   * led3 red   = No timing is available from the
   *              cable or the on-board frequency
   *              generator.
   */

  link_status = lmc_mii_readreg (sc, 0, 16);

  /* Is the transmit clock still available */
  ticks = LMC_CSR_READ (sc, csr_gp_timer);
  ticks = 0x0000ffff - (ticks & 0x0000ffff);

  lmc_led_on (sc, LMC_MII16_LED0);

  /* ====== transmit clock determination ===== */
  if (sc->lmc_timing == LMC_CTL_CLOCK_SOURCE_INT) {
      lmc_led_off(sc, LMC_MII16_LED3);
  }
  else if (ticks == 0 ) {				/* no clock found ? */
      ret = 0;
      if(sc->last_led_err[3] != 1){
          sc->stats.tx_lossOfClockCnt++;
          printk(KERN_WARNING "%s: Lost Clock, Link Down\n", sc->name);
      }
      sc->last_led_err[3] = 1;
      lmc_led_on (sc, LMC_MII16_LED3);	/* turn ON red LED */
  }
  else {
      if(sc->last_led_err[3] == 1)
          printk(KERN_WARNING "%s: Clock Returned\n", sc->name);
      sc->last_led_err[3] = 0;
      lmc_led_off (sc, LMC_MII16_LED3);		/* turn OFF red LED */
  }

  if ((link_status & LMC_MII16_SSI_DSR) == 0) { /* Also HSSI CA */
      ret = 0;
      hw_hdsk = 0;
  }

#ifdef CONFIG_LMC_IGNORE_HARDWARE_HANDSHAKE
  if ((link_status & (LMC_MII16_SSI_CTS | LMC_MII16_SSI_DCD)) == 0){
      ret = 0;
      hw_hdsk = 0;
  }
#endif

  if(hw_hdsk == 0){
      if(sc->last_led_err[1] != 1)
          printk(KERN_WARNING "%s: DSR not asserted\n", sc->name);
      sc->last_led_err[1] = 1;
      lmc_led_off(sc, LMC_MII16_LED1);
  }
  else {
      if(sc->last_led_err[1] != 0)
          printk(KERN_WARNING "%s: DSR now asserted\n", sc->name);
      sc->last_led_err[1] = 0;
      lmc_led_on(sc, LMC_MII16_LED1);
  }

  if(ret == 1) {
      lmc_led_on(sc, LMC_MII16_LED2); /* Over all good status? */
  }
  
  return ret;
}

static void
lmc_ssi_set_link_status (lmc_softc_t * const sc, int state)
{
  if (state == LMC_LINK_UP)
    {
      sc->lmc_miireg16 |= (LMC_MII16_SSI_DTR | LMC_MII16_SSI_RTS);
      printk (LMC_PRINTF_FMT ": asserting DTR and RTS\n", LMC_PRINTF_ARGS);
    }
  else
    {
      sc->lmc_miireg16 &= ~(LMC_MII16_SSI_DTR | LMC_MII16_SSI_RTS);
      printk (LMC_PRINTF_FMT ": deasserting DTR and RTS\n", LMC_PRINTF_ARGS);
    }

  lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);

}

/*
 * 0 == 16bit, 1 == 32bit
 */
static void
lmc_ssi_set_crc_length (lmc_softc_t * const sc, int state)
{
  if (state == LMC_CTL_CRC_LENGTH_32)
    {
      /* 32 bit */
      sc->lmc_miireg16 |= LMC_MII16_SSI_CRC;
      sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_32;
      sc->lmc_crcSize = LMC_CTL_CRC_BYTESIZE_4;

    }
  else
    {
      /* 16 bit */
      sc->lmc_miireg16 &= ~LMC_MII16_SSI_CRC;
      sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_16;
      sc->lmc_crcSize = LMC_CTL_CRC_BYTESIZE_2;
    }

  lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}

/*
 * These are bits to program the ssi frequency generator
 */
static inline void
write_av9110_bit (lmc_softc_t * sc, int c)
{
  /*
   * set the data bit as we need it.
   */
  sc->lmc_gpio &= ~(LMC_GEP_CLK);
  if (c & 0x01)
    sc->lmc_gpio |= LMC_GEP_DATA;
  else