Add a common get_ram_size() function and modify the the

board-specific files to invoke that common implementation.

1 files changed, 226 insertions, 277 deletions

diff --git a/board/LEOX/elpt860/elpt860.c b/board/LEOX/elpt860/elpt860.c
index 254497fd5c5..c8bc41a9b1d 100644
--- a/board/LEOX/elpt860/elpt860.c
+++ b/board/LEOX/elpt860/elpt860.c
@@ -53,89 +53,87 @@ static long int dram_size (long int, long int *, long int);
 
 #define	_NOT_USED_	0xFFFFFFFF
 
-const uint init_sdram_table[] =
-{
-  /*
-   * Single Read. (Offset 0 in UPMA RAM)
-   */
-  0x0FFCCC04, 0xFFFFFC04, 0x0FFC3C04, 0xFFFFFC04,
-  0xFFFFFC04, /* last */
-  /*
-   * SDRAM Initialization (offset 5 in UPMA RAM)
-   *
-   * This is no UPM entry point. The following definition uses
-   * the remaining space to establish an initialization
-   * sequence, which is executed by a RUN command.
-   *
-   */
-  0xFFFFFC04, 0xFFFFFC04, 0x0FFC3C04,  /* last */
-  /*
-   * Burst Read. (Offset 8 in UPMA RAM)
-   */
-  0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
-  0x0FFC3C04, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
-  0xFFFFFC04, 0x0FFC3C04, 0xFFFFFC04, 0xFFFFFC04,
-  0xFFFFFC04, 0xFFFFFC04, 0x0FFC3C04, 0xFFFFFC04, /* last */
-  /*
-   * Single Write. (Offset 18 in UPMA RAM)
-   */
-  0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04, 0x0FFC3C04,
-  0xFFFFFC04, 0xFFFFFC04, 0x0FFFFC04, 0xFFFFFC04, /* last */
-  /*
-   * Burst Write. (Offset 20 in UPMA RAM)
-   */
-  0x0FFC3C04, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
-  0xFFFFFC04, 0x0FFC3C04, 0xFFFFFC04, 0xFFFFFC04,
-  0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC34, 0x0FAC0C34,
-  0xFFFFFC05, 0xFFFFFC04, 0x0FFCFC04, 0xFFFFFC05, /* last */
+const uint init_sdram_table[] = {
+	/*
+	 * Single Read. (Offset 0 in UPMA RAM)
+	 */
+	0x0FFCCC04, 0xFFFFFC04, 0x0FFC3C04, 0xFFFFFC04,
+	0xFFFFFC04,		/* last */
+	/*
+	 * SDRAM Initialization (offset 5 in UPMA RAM)
+	 *
+	 * This is no UPM entry point. The following definition uses
+	 * the remaining space to establish an initialization
+	 * sequence, which is executed by a RUN command.
+	 *
+	 */
+	0xFFFFFC04, 0xFFFFFC04, 0x0FFC3C04,	/* last */
+	/*
+	 * Burst Read. (Offset 8 in UPMA RAM)
+	 */
+	0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
+	0x0FFC3C04, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
+	0xFFFFFC04, 0x0FFC3C04, 0xFFFFFC04, 0xFFFFFC04,
+	0xFFFFFC04, 0xFFFFFC04, 0x0FFC3C04, 0xFFFFFC04,	/* last */
+	/*
+	 * Single Write. (Offset 18 in UPMA RAM)
+	 */
+	0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04, 0x0FFC3C04,
+	0xFFFFFC04, 0xFFFFFC04, 0x0FFFFC04, 0xFFFFFC04,	/* last */
+	/*
+	 * Burst Write. (Offset 20 in UPMA RAM)
+	 */
+	0x0FFC3C04, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
+	0xFFFFFC04, 0x0FFC3C04, 0xFFFFFC04, 0xFFFFFC04,
+	0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC34, 0x0FAC0C34,
+	0xFFFFFC05, 0xFFFFFC04, 0x0FFCFC04, 0xFFFFFC05,	/* last */
 };
 
-const uint sdram_table[] =
-{
-  /*
-   * Single Read. (Offset 0 in UPMA RAM)
-   */
-  0x0F0FFC24, 0x0F0CFC04, 0xFF0FFC04, 0x00AF3C04,
-  0xFF0FFC00, /* last */
-  /*
-   * SDRAM Initialization (offset 5 in UPMA RAM)
-   *
-   * This is no UPM entry point. The following definition uses
-   * the remaining space to establish an initialization
-   * sequence, which is executed by a RUN command.
-   *
-   */
-  0x0FFCCC04, 0xFFAFFC05, 0xFFAFFC05, /* last */
-  /*
-   * Burst Read. (Offset 8 in UPMA RAM)
-   */
-  0x0F0FFC24, 0x0F0CFC04, 0xFF0FFC04, 0x00AF3C04,
-  0xF00FFC00, 0xF00FFC00, 0xF00FFC00, 0xFF0FFC00,
-  0x0FFCCC04, 0xFFAFFC05, 0xFFAFFC04, 0xFFAFFC04,
-  0xFFAFFC04, 0xFFAFFC04, 0xFFAFFC04, 0xFFAFFC04, /* last */
-  /*
-   * Single Write. (Offset 18 in UPMA RAM)
-   */
-  0x0F0FFC24, 0x0F0CFC04, 0xFF0FFC04, 0x00AF0C00,
-  0xFF0FFC04, 0x0FFCCC04, 0xFFAFFC05, /* last */
-  _NOT_USED_,
-  /*
-   * Burst Write. (Offset 20 in UPMA RAM)
-   */
-  0x0F0FFC24, 0x0F0CFC04, 0xFF0FFC00, 0x00AF0C00,
-  0xF00FFC00, 0xF00FFC00, 0xF00FFC04, 0x0FFCCC04,
-  0xFFAFFC04, 0xFFAFFC05, 0xFFAFFC04, 0xFFAFFC04,
-  0xFFAFFC04, 0xFFAFFC04, 0xFFAFFC04, 0xFFAFFC04, /* last */
-  /*
-   * Refresh  (Offset 30 in UPMA RAM)
-   */
-  0x0FFC3C04, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
-  0xFFFFFC05, 0xFFFFFC04, 0xFFFFFC05, _NOT_USED_,
-  0xFFAFFC04, 0xFFAFFC04, 0xFFAFFC04, 0xFFAFFC04, /* last */
-  /*
-   * Exception. (Offset 3c in UPMA RAM)
-   */
-  0x0FFFFC34, 0x0FAC0C34, 0xFFFFFC05, 0xFFAFFC04, /* last */
+const uint sdram_table[] = {
+	/*
+	 * Single Read. (Offset 0 in UPMA RAM)
+	 */
+	0x0F0FFC24, 0x0F0CFC04, 0xFF0FFC04, 0x00AF3C04,
+	0xFF0FFC00,		/* last */
+	/*
+	 * SDRAM Initialization (offset 5 in UPMA RAM)
+	 *
+	 * This is no UPM entry point. The following definition uses
+	 * the remaining space to establish an initialization
+	 * sequence, which is executed by a RUN command.
+	 *
+	 */
+	0x0FFCCC04, 0xFFAFFC05, 0xFFAFFC05,	/* last */
+	/*
+	 * Burst Read. (Offset 8 in UPMA RAM)
+	 */
+	0x0F0FFC24, 0x0F0CFC04, 0xFF0FFC04, 0x00AF3C04,
+	0xF00FFC00, 0xF00FFC00, 0xF00FFC00, 0xFF0FFC00,
+	0x0FFCCC04, 0xFFAFFC05, 0xFFAFFC04, 0xFFAFFC04,
+	0xFFAFFC04, 0xFFAFFC04, 0xFFAFFC04, 0xFFAFFC04,	/* last */
+	/*
+	 * Single Write. (Offset 18 in UPMA RAM)
+	 */
+	0x0F0FFC24, 0x0F0CFC04, 0xFF0FFC04, 0x00AF0C00,
+	0xFF0FFC04, 0x0FFCCC04, 0xFFAFFC05,	/* last */
+	_NOT_USED_,
+	/*
+	 * Burst Write. (Offset 20 in UPMA RAM)
+	 */
+	0x0F0FFC24, 0x0F0CFC04, 0xFF0FFC00, 0x00AF0C00,
+	0xF00FFC00, 0xF00FFC00, 0xF00FFC04, 0x0FFCCC04,
+	0xFFAFFC04, 0xFFAFFC05, 0xFFAFFC04, 0xFFAFFC04,
+	0xFFAFFC04, 0xFFAFFC04, 0xFFAFFC04, 0xFFAFFC04,	/* last */
+	/*
+	 * Refresh  (Offset 30 in UPMA RAM)
+	 */
+	0x0FFC3C04, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
+	0xFFFFFC05, 0xFFFFFC04, 0xFFFFFC05, _NOT_USED_,
+	0xFFAFFC04, 0xFFAFFC04, 0xFFAFFC04, 0xFFAFFC04,	/* last */
+	/*
+	 * Exception. (Offset 3c in UPMA RAM)
+	 */
+	0x0FFFFC34, 0x0FAC0C34, 0xFFFFFC05, 0xFFAFFC04,	/* last */
 };
 
 /* ------------------------------------------------------------------------- */
@@ -147,19 +145,18 @@ const uint sdram_table[] =
 /*
  * Very early board init code (fpga boot, etc.)
  */
-int
-board_pre_init (void)
+int board_pre_init (void)
 {
-  volatile immap_t *immr = (immap_t *) CFG_IMMR;
+	volatile immap_t *immr = (immap_t *) CFG_IMMR;
 
-  /*
-   * Light up the red led on ELPT860 pcb (DS1) (PCDAT)
-   */
-  immr->im_ioport.iop_pcdat &= ~CFG_DS1;   /* PCDAT (DS1 = 0)                */
-  immr->im_ioport.iop_pcpar &= ~CFG_DS1;   /* PCPAR (0=general purpose I/O)  */
-  immr->im_ioport.iop_pcdir |=  CFG_DS1;   /* PCDIR (I/O: 0=input, 1=output) */
+	/*
+	 * Light up the red led on ELPT860 pcb (DS1) (PCDAT)
+	 */
+	immr->im_ioport.iop_pcdat &= ~CFG_DS1;	/* PCDAT (DS1 = 0)                */
+	immr->im_ioport.iop_pcpar &= ~CFG_DS1;	/* PCPAR (0=general purpose I/O)  */
+	immr->im_ioport.iop_pcdir |= CFG_DS1;	/* PCDIR (I/O: 0=input, 1=output) */
 
-  return ( 0 );    /* success */
+	return (0);		/* success */
 }
 
 /*
@@ -170,150 +167,143 @@ board_pre_init (void)
  * Return 1 if no second DRAM bank, otherwise returns 0
  */
 
-int
-checkboard (void)
+int checkboard (void)
 {
-    unsigned char *s = getenv("serial#");
+	unsigned char *s = getenv ("serial#");
 
-    if ( !s || strncmp(s, "ELPT860", 7) )
-      printf ("### No HW ID - assuming ELPT860\n");
+	if (!s || strncmp (s, "ELPT860", 7))
+		printf ("### No HW ID - assuming ELPT860\n");
 
-    return ( 0 );    /* success */
+	return (0);		/* success */
 }
 
 /* ------------------------------------------------------------------------- */
 
-long int
-initdram (int board_type)
+long int initdram (int board_type)
 {
-    volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
-    volatile memctl8xx_t *memctl = &immap->im_memctl;
-    long int              size8, size9;
-    long int              size_b0 = 0;
-
-    /*
-     * This sequence initializes SDRAM chips on ELPT860 board
-     */
-    upmconfig(UPMA, (uint *)init_sdram_table,
-	      sizeof(init_sdram_table)/sizeof(uint));
-
-    memctl->memc_mptpr = 0x0200;
-    memctl->memc_mamr  = 0x18002111;
-
-    memctl->memc_mar   = 0x00000088;
-    memctl->memc_mcr   = 0x80002000;	/* CS1: SDRAM bank 0 */
-
-    upmconfig(UPMA, (uint *)sdram_table,
-	      sizeof(sdram_table)/sizeof(uint));
-
-    /*
-     * Preliminary prescaler for refresh (depends on number of
-     * banks): This value is selected for four cycles every 62.4 us
-     * with two SDRAM banks or four cycles every 31.2 us with one
-     * bank. It will be adjusted after memory sizing.
-     */
-    memctl->memc_mptpr = CFG_MPTPR_2BK_8K;
-
-    /*
-     * The following value is used as an address (i.e. opcode) for
-     * the LOAD MODE REGISTER COMMAND during SDRAM initialisation. If
-     * the port size is 32bit the SDRAM does NOT "see" the lower two
-     * address lines, i.e. mar=0x00000088 -> opcode=0x00000022 for
-     * MICRON SDRAMs:
-     * ->    0 00 010 0 010
-     *       |  |   | |   +- Burst Length = 4
-     *       |  |   | +----- Burst Type   = Sequential
-     *       |  |   +------- CAS Latency  = 2
-     *       |  +----------- Operating Mode = Standard
-     *       +-------------- Write Burst Mode = Programmed Burst Length
-     */
-    memctl->memc_mar   = 0x00000088;
-
-    /*
-     * Map controller banks 2 and 3 to the SDRAM banks 2 and 3 at
-     * preliminary addresses - these have to be modified after the
-     * SDRAM size has been determined.
-     */
-    memctl->memc_or1   = CFG_OR1_PRELIM;
-    memctl->memc_br1   = CFG_BR1_PRELIM;
-
-    memctl->memc_mamr  = CFG_MAMR_8COL & (~(MAMR_PTAE)); /* no refresh yet */
-
-    udelay (200);
-
-    /* perform SDRAM initializsation sequence */
-
-    memctl->memc_mcr   = 0x80002105;	/* CS1: SDRAM bank 0 */
-    udelay (1);
-    memctl->memc_mcr   = 0x80002230;	/* CS1: SDRAM bank 0 - execute twice */
-    udelay (1);
-
-    memctl->memc_mamr |= MAMR_PTAE;	/* enable refresh */
-
-    udelay (1000);
-
-    /*
-     * Check Bank 0 Memory Size for re-configuration
-     *
-     * try 8 column mode
-     */
-    size8 = dram_size (CFG_MAMR_8COL,
-		       (ulong *) SDRAM_BASE1_PRELIM,
-		       SDRAM_MAX_SIZE);
-
-    udelay (1000);
-
-    /*
-     * try 9 column mode
-     */
-    size9 = dram_size (CFG_MAMR_9COL,
-		       (ulong *) SDRAM_BASE1_PRELIM,
-		       SDRAM_MAX_SIZE);
-
-    if ( size8 < size9 )    /* leave configuration at 9 columns	*/
-      {
-	size_b0 = size9;
-	/* debug ("SDRAM Bank 0 in 9 column mode: %ld MB\n", size >> 20); */
-      }
-    else                  /* back to 8 columns			*/
-      {
-	size_b0 = size8;
-	memctl->memc_mamr = CFG_MAMR_8COL;
-	udelay (500);
-	/* debug ("SDRAM Bank 0 in 8 column mode: %ld MB\n", size >> 20); */
-      }
-
-    udelay (1000);
-
-    /*
-     * Adjust refresh rate depending on SDRAM type, both banks
-     * For types > 128 MBit leave it at the current (fast) rate
-     */
-    if ( size_b0 < 0x02000000 )
-      {
-	/* reduce to 15.6 us (62.4 us / quad) */
-	memctl->memc_mptpr = CFG_MPTPR_2BK_4K;
+	volatile immap_t *immap = (immap_t *) CFG_IMMR;
+	volatile memctl8xx_t *memctl = &immap->im_memctl;
+	long int size8, size9;
+	long int size_b0 = 0;
+
+	/*
+	 * This sequence initializes SDRAM chips on ELPT860 board
+	 */
+	upmconfig (UPMA, (uint *) init_sdram_table,
+		   sizeof (init_sdram_table) / sizeof (uint));
+
+	memctl->memc_mptpr = 0x0200;
+	memctl->memc_mamr = 0x18002111;
+
+	memctl->memc_mar = 0x00000088;
+	memctl->memc_mcr = 0x80002000;	/* CS1: SDRAM bank 0 */
+
+	upmconfig (UPMA, (uint *) sdram_table,
+		   sizeof (sdram_table) / sizeof (uint));
+
+	/*
+	 * Preliminary prescaler for refresh (depends on number of
+	 * banks): This value is selected for four cycles every 62.4 us
+	 * with two SDRAM banks or four cycles every 31.2 us with one
+	 * bank. It will be adjusted after memory sizing.
+	 */
+	memctl->memc_mptpr = CFG_MPTPR_2BK_8K;
+
+	/*
+	 * The following value is used as an address (i.e. opcode) for
+	 * the LOAD MODE REGISTER COMMAND during SDRAM initialisation. If
+	 * the port size is 32bit the SDRAM does NOT "see" the lower two
+	 * address lines, i.e. mar=0x00000088 -> opcode=0x00000022 for
+	 * MICRON SDRAMs:
+	 * ->    0 00 010 0 010
+	 *       |  |   | |   +- Burst Length = 4
+	 *       |  |   | +----- Burst Type   = Sequential
+	 *       |  |   +------- CAS Latency  = 2
+	 *       |  +----------- Operating Mode = Standard
+	 *       +-------------- Write Burst Mode = Programmed Burst Length
+	 */
+	memctl->memc_mar = 0x00000088;
+
+	/*
+	 * Map controller banks 2 and 3 to the SDRAM banks 2 and 3 at
+	 * preliminary addresses - these have to be modified after the
+	 * SDRAM size has been determined.
+	 */
+	memctl->memc_or1 = CFG_OR1_PRELIM;
+	memctl->memc_br1 = CFG_BR1_PRELIM;
+
+	memctl->memc_mamr = CFG_MAMR_8COL & (~(MAMR_PTAE));	/* no refresh yet */
+
+	udelay (200);
+
+	/* perform SDRAM initializsation sequence */
+
+	memctl->memc_mcr = 0x80002105;	/* CS1: SDRAM bank 0 */
+	udelay (1);
+	memctl->memc_mcr = 0x80002230;	/* CS1: SDRAM bank 0 - execute twice */
+	udelay (1);
+
+	memctl->memc_mamr |= MAMR_PTAE;	/* enable refresh */
+
+	udelay (1000);
+
+	/*
+	 * Check Bank 0 Memory Size for re-configuration
+	 *
+	 * try 8 column mode
+	 */
+	size8 = dram_size (CFG_MAMR_8COL,
+			   (ulong *) SDRAM_BASE1_PRELIM, SDRAM_MAX_SIZE);
+
 	udelay (1000);
-      }
 
-    /*
-     * Final mapping: map bigger bank first
-     */
-    memctl->memc_or1 = ((-size_b0) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM;
-    memctl->memc_br1 = (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;
+	/*
+	 * try 9 column mode
+	 */
+	size9 = dram_size (CFG_MAMR_9COL,
+			   (ulong *) SDRAM_BASE1_PRELIM, SDRAM_MAX_SIZE);
+
+	if (size8 < size9) {	/* leave configuration at 9 columns       */
+		size_b0 = size9;
+		/* debug ("SDRAM Bank 0 in 9 column mode: %ld MB\n", size >> 20); */
+	} else {		/* back to 8 columns                      */
+
+		size_b0 = size8;
+		memctl->memc_mamr = CFG_MAMR_8COL;
+		udelay (500);
+		/* debug ("SDRAM Bank 0 in 8 column mode: %ld MB\n", size >> 20); */
+	}
+
+	udelay (1000);
+
+	/*
+	 * Adjust refresh rate depending on SDRAM type, both banks
+	 * For types > 128 MBit leave it at the current (fast) rate
+	 */
+	if (size_b0 < 0x02000000) {
+		/* reduce to 15.6 us (62.4 us / quad) */
+		memctl->memc_mptpr = CFG_MPTPR_2BK_4K;
+		udelay (1000);
+	}
+
+	/*
+	 * Final mapping: map bigger bank first
+	 */
+	memctl->memc_or1 = ((-size_b0) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM;
+	memctl->memc_br1 = (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;
 
-    {
-      unsigned long reg;
+	{
+		unsigned long reg;
 
-      /* adjust refresh rate depending on SDRAM type, one bank */
-      reg = memctl->memc_mptpr;
-      reg >>= 1;	/* reduce to CFG_MPTPR_1BK_8K / _4K */
-      memctl->memc_mptpr = reg;
-    }
+		/* adjust refresh rate depending on SDRAM type, one bank */
+		reg = memctl->memc_mptpr;
+		reg >>= 1;	/* reduce to CFG_MPTPR_1BK_8K / _4K */
+		memctl->memc_mptpr = reg;
+	}
 
-    udelay(10000);
+	udelay (10000);
 
-    return (size_b0);
+	return (size_b0);
 }
 
 /* ------------------------------------------------------------------------- */
@@ -327,54 +317,14 @@ initdram (int board_type)
  */
 
 static long int
-dram_size (long int   mamr_value,
-	   long int  *base,
-	   long int   maxsize)
+dram_size (long int mamr_value, long int *base, long int maxsize)
 {
-  volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
-  volatile memctl8xx_t *memctl = &immap->im_memctl;
-  volatile long int    *addr;
-  ulong                 cnt, val;
-  ulong                 save[32];    /* to make test non-destructive */
-  unsigned char         i = 0;
-
-  memctl->memc_mamr = mamr_value;
-
-  for (cnt = maxsize/sizeof(long); cnt > 0; cnt >>= 1)
-    {
-      addr = base + cnt;    /* pointer arith! */
-
-      save[i++] = *addr;
-      *addr     = ~cnt;
-    }
-
-  /* write 0 to base address */
-  addr    = base;
-  save[i] = *addr;
-  *addr   = 0;
+	volatile immap_t *immap = (immap_t *) CFG_IMMR;
+	volatile memctl8xx_t *memctl = &immap->im_memctl;
 
-  /* check at base address */
-  if ( (val = *addr) != 0 )
-    {
-      *addr = save[i];
-
-      return (0);
-    }
-
-  for (cnt = 1; cnt <= maxsize/sizeof(long); cnt <<= 1)
-    {
-      addr = base + cnt;    /* pointer arith! */
-
-      val   = *addr;
-      *addr = save[--i];
-
-      if ( val != (~cnt) )
-	{
-	  return (cnt * sizeof(long));
-	}
-    }
+	memctl->memc_mamr = mamr_value;
 
-  return (maxsize);
+	return (get_ram_size (base, maxsize));
 }
 
 /* ------------------------------------------------------------------------- */
@@ -384,16 +334,15 @@ dram_size (long int   mamr_value,
 
 #define CFG_LBKs    (CFG_PA2 | CFG_PA1)
 
-void
-reset_phy (void)
+void reset_phy (void)
 {
-  volatile immap_t *immr = (immap_t *) CFG_IMMR;
-
-  /*
-   * Ensure LBK LXT901 ethernet 1 & 2 = 0 ... for normal loopback in effect
-   *                                          and no AUI loopback
-   */
-  immr->im_ioport.iop_padat &= ~CFG_LBKs;  /* PADAT (LBK eth 1&2 = 0)        */
-  immr->im_ioport.iop_papar &= ~CFG_LBKs;  /* PAPAR (0=general purpose I/O)  */
-  immr->im_ioport.iop_padir |=  CFG_LBKs;  /* PADIR (I/O: 0=input, 1=output) */
+	volatile immap_t *immr = (immap_t *) CFG_IMMR;
+
+	/*
+	 * Ensure LBK LXT901 ethernet 1 & 2 = 0 ... for normal loopback in effect
+	 *                                          and no AUI loopback
+	 */
+	immr->im_ioport.iop_padat &= ~CFG_LBKs;	/* PADAT (LBK eth 1&2 = 0)        */
+	immr->im_ioport.iop_papar &= ~CFG_LBKs;	/* PAPAR (0=general purpose I/O)  */
+	immr->im_ioport.iop_padir |= CFG_LBKs;	/* PADIR (I/O: 0=input, 1=output) */
 }