lmc_media.c

linux-2.6.15.6

    sc->lmc_gpio &= ~(LMC_GEP_DATA);
  LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);

  /*
   * set the clock to high
   */
  sc->lmc_gpio |= LMC_GEP_CLK;
  LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);

  /*
   * set the clock to low again.
   */
  sc->lmc_gpio &= ~(LMC_GEP_CLK);
  LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
}

static void
write_av9110 (lmc_softc_t * sc, u_int32_t n, u_int32_t m, u_int32_t v,
	      u_int32_t x, u_int32_t r)
{
  int i;

#if 0
  printk (LMC_PRINTF_FMT ": speed %u, %d %d %d %d %d\n",
	  LMC_PRINTF_ARGS, sc->ictl.clock_rate, n, m, v, x, r);
#endif

  sc->lmc_gpio |= LMC_GEP_SSI_GENERATOR;
  sc->lmc_gpio &= ~(LMC_GEP_DATA | LMC_GEP_CLK);
  LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);

  /*
   * Set the TXCLOCK, GENERATOR, SERIAL, and SERIALCLK
   * as outputs.
   */
  lmc_gpio_mkoutput (sc, (LMC_GEP_DATA | LMC_GEP_CLK
			  | LMC_GEP_SSI_GENERATOR));

  sc->lmc_gpio &= ~(LMC_GEP_SSI_GENERATOR);
  LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);

  /*
   * a shifting we will go...
   */
  for (i = 0; i < 7; i++)
    write_av9110_bit (sc, n >> i);
  for (i = 0; i < 7; i++)
    write_av9110_bit (sc, m >> i);
  for (i = 0; i < 1; i++)
    write_av9110_bit (sc, v >> i);
  for (i = 0; i < 2; i++)
    write_av9110_bit (sc, x >> i);
  for (i = 0; i < 2; i++)
    write_av9110_bit (sc, r >> i);
  for (i = 0; i < 5; i++)
    write_av9110_bit (sc, 0x17 >> i);

  /*
   * stop driving serial-related signals
   */
  lmc_gpio_mkinput (sc,
		    (LMC_GEP_DATA | LMC_GEP_CLK
		     | LMC_GEP_SSI_GENERATOR));
}

static void
lmc_ssi_watchdog (lmc_softc_t * const sc)
{
  u_int16_t mii17;
  struct ssicsr2
  {
    unsigned short dtr:1, dsr:1, rts:1, cable:3, crc:1, led0:1, led1:1,
      led2:1, led3:1, fifo:1, ll:1, rl:1, tm:1, loop:1;
  };
  struct ssicsr2 *ssicsr;
  mii17 = lmc_mii_readreg (sc, 0, 17);
  ssicsr = (struct ssicsr2 *) &mii17;
  if (ssicsr->cable == 7)
    {
      lmc_led_off (sc, LMC_MII16_LED2);
    }
  else
    {
      lmc_led_on (sc, LMC_MII16_LED2);
    }

}

/*
 *  T1 methods
 */

/*
 * The framer regs are multiplexed through MII regs 17 & 18
 *  write the register address to MII reg 17 and the *  data to MII reg 18. */
static void
lmc_t1_write (lmc_softc_t * const sc, int a, int d)
{
  lmc_mii_writereg (sc, 0, 17, a);
  lmc_mii_writereg (sc, 0, 18, d);
}

/* Save a warning
static int
lmc_t1_read (lmc_softc_t * const sc, int a)
{
  lmc_mii_writereg (sc, 0, 17, a);
  return lmc_mii_readreg (sc, 0, 18);
}
*/


static void
lmc_t1_init (lmc_softc_t * const sc)
{
  u_int16_t mii16;
  int i;

  sc->ictl.cardtype = LMC_CTL_CARDTYPE_LMC1200;
  mii16 = lmc_mii_readreg (sc, 0, 16);

  /* reset 8370 */
  mii16 &= ~LMC_MII16_T1_RST;
  lmc_mii_writereg (sc, 0, 16, mii16 | LMC_MII16_T1_RST);
  lmc_mii_writereg (sc, 0, 16, mii16);

  /* set T1 or E1 line.  Uses sc->lmcmii16 reg in function so update it */
  sc->lmc_miireg16 = mii16;
  lmc_t1_set_circuit_type(sc, LMC_CTL_CIRCUIT_TYPE_T1);
  mii16 = sc->lmc_miireg16;

  lmc_t1_write (sc, 0x01, 0x1B);	/* CR0     - primary control             */
  lmc_t1_write (sc, 0x02, 0x42);	/* JAT_CR  - jitter atten config         */
  lmc_t1_write (sc, 0x14, 0x00);	/* LOOP    - loopback config             */
  lmc_t1_write (sc, 0x15, 0x00);	/* DL3_TS  - external data link timeslot */
  lmc_t1_write (sc, 0x18, 0xFF);	/* PIO     - programmable I/O            */
  lmc_t1_write (sc, 0x19, 0x30);	/* POE     - programmable OE             */
  lmc_t1_write (sc, 0x1A, 0x0F);	/* CMUX    - clock input mux             */
  lmc_t1_write (sc, 0x20, 0x41);	/* LIU_CR  - RX LIU config               */
  lmc_t1_write (sc, 0x22, 0x76);	/* RLIU_CR - RX LIU config               */
  lmc_t1_write (sc, 0x40, 0x03);	/* RCR0    - RX config                   */
  lmc_t1_write (sc, 0x45, 0x00);	/* RALM    - RX alarm config             */
  lmc_t1_write (sc, 0x46, 0x05);	/* LATCH   - RX alarm/err/cntr latch     */
  lmc_t1_write (sc, 0x68, 0x40);	/* TLIU_CR - TX LIU config               */
  lmc_t1_write (sc, 0x70, 0x0D);	/* TCR0    - TX framer config            */
  lmc_t1_write (sc, 0x71, 0x05);	/* TCR1    - TX config                   */
  lmc_t1_write (sc, 0x72, 0x0B);	/* TFRM    - TX frame format             */
  lmc_t1_write (sc, 0x73, 0x00);	/* TERROR  - TX error insert             */
  lmc_t1_write (sc, 0x74, 0x00);	/* TMAN    - TX manual Sa/FEBE config    */
  lmc_t1_write (sc, 0x75, 0x00);	/* TALM    - TX alarm signal config      */
  lmc_t1_write (sc, 0x76, 0x00);	/* TPATT   - TX test pattern config      */
  lmc_t1_write (sc, 0x77, 0x00);	/* TLB     - TX inband loopback config   */
  lmc_t1_write (sc, 0x90, 0x05);	/* CLAD_CR - clock rate adapter config   */
  lmc_t1_write (sc, 0x91, 0x05);	/* CSEL    - clad freq sel               */
  lmc_t1_write (sc, 0xA6, 0x00);	/* DL1_CTL - DL1 control                 */
  lmc_t1_write (sc, 0xB1, 0x00);	/* DL2_CTL - DL2 control                 */
  lmc_t1_write (sc, 0xD0, 0x47);	/* SBI_CR  - sys bus iface config        */
  lmc_t1_write (sc, 0xD1, 0x70);	/* RSB_CR  - RX sys bus config           */
  lmc_t1_write (sc, 0xD4, 0x30);	/* TSB_CR  - TX sys bus config           */
  for (i = 0; i < 32; i++)
    {
      lmc_t1_write (sc, 0x0E0 + i, 0x00);	/* SBCn - sys bus per-channel ctl    */
      lmc_t1_write (sc, 0x100 + i, 0x00);	/* TPCn - TX per-channel ctl         */
      lmc_t1_write (sc, 0x180 + i, 0x00);	/* RPCn - RX per-channel ctl         */
    }
  for (i = 1; i < 25; i++)
    {
      lmc_t1_write (sc, 0x0E0 + i, 0x0D);	/* SBCn - sys bus per-channel ctl    */
    }

  mii16 |= LMC_MII16_T1_XOE;
  lmc_mii_writereg (sc, 0, 16, mii16);
  sc->lmc_miireg16 = mii16;
}

static void
lmc_t1_default (lmc_softc_t * const sc)
{
  sc->lmc_miireg16 = LMC_MII16_LED_ALL;
  sc->lmc_media->set_link_status (sc, LMC_LINK_DOWN);
  sc->lmc_media->set_circuit_type (sc, LMC_CTL_CIRCUIT_TYPE_T1);
  sc->lmc_media->set_crc_length (sc, LMC_CTL_CRC_LENGTH_16);
  /* Right now we can only clock from out internal source */
  sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_INT;
}
/* * Given a user provided state, set ourselves up to match it.  This will * always reset the card if needed.
 */
static void
lmc_t1_set_status (lmc_softc_t * const sc, lmc_ctl_t * ctl)
{
  if (ctl == NULL)
    {
      sc->lmc_media->set_circuit_type (sc, sc->ictl.circuit_type);
      lmc_set_protocol (sc, NULL);

      return;
    }
  /*
   * check for change in circuit type         */
  if (ctl->circuit_type == LMC_CTL_CIRCUIT_TYPE_T1
      && sc->ictl.circuit_type ==
      LMC_CTL_CIRCUIT_TYPE_E1) sc->lmc_media->set_circuit_type (sc,
								LMC_CTL_CIRCUIT_TYPE_E1);
  else if (ctl->circuit_type == LMC_CTL_CIRCUIT_TYPE_E1
	   && sc->ictl.circuit_type == LMC_CTL_CIRCUIT_TYPE_T1)
    sc->lmc_media->set_circuit_type (sc, LMC_CTL_CIRCUIT_TYPE_T1);
  lmc_set_protocol (sc, ctl);
}
/*
 * return hardware link status.
 * 0 == link is down, 1 == link is up.
 */ static int
lmc_t1_get_link_status (lmc_softc_t * const sc)
{
    u_int16_t link_status;
    int ret = 1;

  /* 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_trace(sc->lmc_device, "lmc_t1_get_link_status in");
    lmc_led_on(sc, LMC_DS3_LED2);

    lmc_mii_writereg (sc, 0, 17, T1FRAMER_ALARM1_STATUS);
    link_status = lmc_mii_readreg (sc, 0, 18);


    if (link_status & T1F_RAIS) {			/* turn on blue LED */
        ret = 0;
        if(sc->last_led_err[1] != 1){
            printk(KERN_WARNING "%s: Receive AIS/Blue Alarm. Far end in RED alarm\n", sc->name);
        }
        lmc_led_on(sc, LMC_DS3_LED1);
        sc->last_led_err[1] = 1;
    }
    else {
        if(sc->last_led_err[1] != 0){
            printk(KERN_WARNING "%s: End AIS/Blue Alarm\n", sc->name);
        }
        lmc_led_off (sc, LMC_DS3_LED1);
        sc->last_led_err[1] = 0;
    }

    /*
     * Yellow Alarm is nasty evil stuff, looks at data patterns
     * inside the channel and confuses it with HDLC framing
     * ignore all yellow alarms.
     *
     * Do listen to MultiFrame Yellow alarm which while implemented
     * different ways isn't in the channel and hence somewhat
     * more reliable
     */

    if (link_status & T1F_RMYEL) {
        ret = 0;
        if(sc->last_led_err[0] != 1){
            printk(KERN_WARNING "%s: Receive Yellow AIS Alarm\n", sc->name);
        }
        lmc_led_on(sc, LMC_DS3_LED0);
        sc->last_led_err[0] = 1;
    }
    else {
        if(sc->last_led_err[0] != 0){
            printk(KERN_WARNING "%s: End of Yellow AIS Alarm\n", sc->name);
        }
        lmc_led_off(sc, LMC_DS3_LED0);
        sc->last_led_err[0] = 0;
    }

    /*
     * Loss of signal and los of frame
     * Use the green bit to identify which one lit the led
     */
    if(link_status & T1F_RLOF){
        ret = 0;
        if(sc->last_led_err[3] != 1){
            printk(KERN_WARNING "%s: Local Red Alarm: Loss of Framing\n", sc->name);
        }
        lmc_led_on(sc, LMC_DS3_LED3);
        sc->last_led_err[3] = 1;

    }
    else {
        if(sc->last_led_err[3] != 0){
            printk(KERN_WARNING "%s: End Red Alarm (LOF)\n", sc->name);
        }
        if( ! (link_status & T1F_RLOS))
            lmc_led_off(sc, LMC_DS3_LED3);
        sc->last_led_err[3] = 0;
    }
    
    if(link_status & T1F_RLOS){
        ret = 0;
        if(sc->last_led_err[2] != 1){
            printk(KERN_WARNING "%s: Local Red Alarm: Loss of Signal\n", sc->name);
        }
        lmc_led_on(sc, LMC_DS3_LED3);
        sc->last_led_err[2] = 1;

    }
    else {
        if(sc->last_led_err[2] != 0){
            printk(KERN_WARNING "%s: End Red Alarm (LOS)\n", sc->name);
        }
        if( ! (link_status & T1F_RLOF))
            lmc_led_off(sc, LMC_DS3_LED3);
        sc->last_led_err[2] = 0;
    }

    sc->lmc_xinfo.t1_alarm1_status = link_status;

    lmc_mii_writereg (sc, 0, 17, T1FRAMER_ALARM2_STATUS);
    sc->lmc_xinfo.t1_alarm2_status = lmc_mii_readreg (sc, 0, 18);

    
    lmc_trace(sc->lmc_device, "lmc_t1_get_link_status out");

    return ret;
}

/*
 * 1 == T1 Circuit Type , 0 == E1 Circuit Type
 */
static void
lmc_t1_set_circuit_type (lmc_softc_t * const sc, int ie)
{
  if (ie == LMC_CTL_CIRCUIT_TYPE_T1) {
      sc->lmc_miireg16 |= LMC_MII16_T1_Z;
      sc->ictl.circuit_type = LMC_CTL_CIRCUIT_TYPE_T1;
      printk(KERN_INFO "%s: In T1 Mode\n", sc->name);
  }
  else {
      sc->lmc_miireg16 &= ~LMC_MII16_T1_Z;
      sc->ictl.circuit_type = LMC_CTL_CIRCUIT_TYPE_E1;
      printk(KERN_INFO "%s: In E1 Mode\n", sc->name);
  }

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

/*
 * 0 == 16bit, 1 == 32bit */
static void
lmc_t1_set_crc_length (lmc_softc_t * const sc, int state)
{
  if (state == LMC_CTL_CRC_LENGTH_32)
    {
      /* 32 bit */
      sc->lmc_miireg16 |= LMC_MII16_T1_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_T1_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);
}

/*
 * 1 == internal, 0 == external
 */
static void
lmc_t1_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(old != ie)
        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(old != ie)
        printk (LMC_PRINTF_FMT ": clock internal\n", LMC_PRINTF_ARGS);
    }
}

static void
lmc_t1_watchdog (lmc_softc_t * const sc)
{
}

static void
lmc_set_protocol (lmc_softc_t * const sc, lmc_ctl_t * ctl)
{
  if (ctl == 0)
    {
      sc->ictl.keepalive_onoff = LMC_CTL_ON;

      return;
    }
}