board/RPXClassic/RPXClassic.c

   1 /*
   2  * (C)  Copyright 2001
   3  * Stäubli Faverges - <www.staubli.com>
   4  * Pierre AUBERT  p.aubert@staubli.com
   5  * U-Boot port on RPXClassic LF (CLLF_BW31) board
   6  *
   7  * (C) Copyright 2000
   8  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   9  *
  10  * SPDX-License-Identifier:     GPL-2.0+
  11  */
  12
  13 #include <common.h>
  14 #include <i2c.h>
  15 #include <config.h>
  16 #include <mpc8xx.h>
  17 #include <net.h>
  18
  19 /* ------------------------------------------------------------------------- */
  20
  21 static long int dram_size (long int, long int *, long int);
  22 static unsigned char aschex_to_byte (unsigned char *cp);
  23
  24 /* ------------------------------------------------------------------------- */
  25
  26 #define _NOT_USED_      0xFFFFCC25
  27
  28 const uint sdram_table[] =
  29 {
  30         /*
  31          * Single Read. (Offset 00h in UPMA RAM)
  32          */
  33         0xCFFFCC24, 0x0FFFCC04, 0X0CAFCC04, 0X03AFCC08,
  34         0x3FBFCC27, /* last */
  35         _NOT_USED_, _NOT_USED_, _NOT_USED_,
  36
  37         /*
  38          * Burst Read. (Offset 08h in UPMA RAM)
  39          */
  40         0xCFFFCC24, 0x0FFFCC04, 0x0CAFCC84, 0x03AFCC88,
  41         0x3FBFCC27, /* last */
  42         _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
  43         _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
  44         _NOT_USED_, _NOT_USED_, _NOT_USED_,
  45
  46         /*
  47          * Single Write. (Offset 18h in UPMA RAM)
  48          */
  49         0xCFFFCC24, 0x0FFFCC04, 0x0CFFCC04, 0x03FFCC00,
  50         0x3FFFCC27, /* last */
  51         _NOT_USED_, _NOT_USED_, _NOT_USED_,
  52
  53         /*
  54          * Burst Write. (Offset 20h in UPMA RAM)
  55          */
  56         0xCFFFCC24, 0x0FFFCC04, 0x0CFFCC80, 0x03FFCC8C,
  57         0x0CFFCC00, 0x33FFCC27, /* last */
  58         _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
  59         _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
  60         _NOT_USED_, _NOT_USED_,
  61
  62         /*
  63          * Refresh. (Offset 30h in UPMA RAM)
  64          */
  65         0xC0FFCC24, 0x03FFCC24, 0x0FFFCC24, 0x0FFFCC24,
  66         0x3FFFCC27, /* last */
  67         _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
  68         _NOT_USED_, _NOT_USED_, _NOT_USED_,
  69
  70         /*
  71          * Exception. (Offset 3Ch in UPMA RAM)
  72          */
  73         _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_
  74 };
  75
  76 /* ------------------------------------------------------------------------- */
  77
  78
  79 /*
  80  * Check Board Identity:
  81  */
  82
  83 int checkboard (void)
  84 {
  85         puts ("Board: RPXClassic\n");
  86         return (0);
  87 }
  88
  89 /*-----------------------------------------------------------------------------
  90  * board_get_enetaddr -- Read the MAC Address in the I2C EEPROM
  91  *-----------------------------------------------------------------------------
  92  */
  93 static void board_get_enetaddr(uchar *enet)
  94 {
  95         int i;
  96         char buff[256], *cp;
  97
  98         /* Initialize I2C                                       */
  99         i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 100
 101         /* Read 256 bytes in EEPROM                             */
 102         i2c_read (0x54, 0, 1, (uchar *)buff, 128);
 103         i2c_read (0x54, 128, 1, (uchar *)buff + 128, 128);
 104
 105         /* Retrieve MAC address in buffer (key EA)              */
 106         for (cp = buff;;) {
 107                 if (cp[0] == 'E' && cp[1] == 'A') {
 108                         cp += 3;
 109                         /* Read MAC address                     */
 110                         for (i = 0; i < 6; i++, cp += 2) {
 111                                 enet[i] = aschex_to_byte ((unsigned char *)cp);
 112                         }
 113                 }
 114                 /* Scan to the end of the record                */
 115                 while ((*cp != '\n') && (*cp != (char)0xff)) {
 116                         cp++;
 117                 }
 118                 /* If the next character is a \n, 0 or ff, we are done. */
 119                 cp++;
 120                 if ((*cp == '\n') || (*cp == 0) || (*cp == (char)0xff))
 121                         break;
 122         }
 123
 124 #ifdef CONFIG_FEC_ENET
 125         /* The MAC address is the same as normal ethernet except the 3rd byte    */
 126         /* (See the E.P. Planet Core Overview manual            */
 127         enet[3] |= 0x80;
 128 #endif
 129
 130         printf("MAC address = %pM\n", enet);
 131 }
 132
 133 int misc_init_r(void)
 134 {
 135         uchar enetaddr[6];
 136
 137         if (!eth_getenv_enetaddr("ethaddr", enetaddr)) {
 138                 board_get_enetaddr(enetaddr);
 139                 eth_setenv_enetaddr("ethaddr", enetaddr);
 140         }
 141
 142         return 0;
 143 }
 144
 145 void rpxclassic_init (void)
 146 {
 147         /* Enable NVRAM */
 148         *((uchar *) BCSR0) |= BCSR0_ENNVRAM;
 149
 150 #ifdef CONFIG_FEC_ENET
 151
 152         /* Validate the fast ethernet tranceiver                             */
 153         *((volatile uchar *) BCSR2) &= ~BCSR2_MIICTL;
 154         *((volatile uchar *) BCSR2) &= ~BCSR2_MIIPWRDWN;
 155         *((volatile uchar *) BCSR2) |= BCSR2_MIIRST;
 156         *((volatile uchar *) BCSR2) |= BCSR2_MIIPWRDWN;
 157 #endif
 158
 159 }
 160
 161 /* ------------------------------------------------------------------------- */
 162
 163 phys_size_t initdram (int board_type)
 164 {
 165         volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
 166         volatile memctl8xx_t *memctl = &immap->im_memctl;
 167         long int size10;
 168
 169         upmconfig (UPMA, (uint *) sdram_table,
 170                            sizeof (sdram_table) / sizeof (uint));
 171
 172         /* Refresh clock prescalar */
 173         memctl->memc_mptpr = CONFIG_SYS_MPTPR;
 174
 175         memctl->memc_mar = 0x00000000;
 176
 177         /* Map controller banks 1 to the SDRAM bank */
 178         memctl->memc_or1 = CONFIG_SYS_OR1_PRELIM;
 179         memctl->memc_br1 = CONFIG_SYS_BR1_PRELIM;
 180
 181         memctl->memc_mamr = CONFIG_SYS_MAMR_10COL & (~(MAMR_PTAE));     /* no refresh yet */
 182
 183         udelay (200);
 184
 185         /* perform SDRAM initializsation sequence */
 186
 187         memctl->memc_mcr = 0x80002230;  /* SDRAM bank 0 - refresh twice */
 188         udelay (1);
 189
 190         memctl->memc_mamr |= MAMR_PTAE; /* enable refresh */
 191
 192         udelay (1000);
 193
 194         /* Check Bank 0 Memory Size
 195          * try 10 column mode
 196          */
 197
 198         size10 = dram_size (CONFIG_SYS_MAMR_10COL, SDRAM_BASE_PRELIM,
 199                                                 SDRAM_MAX_SIZE);
 200
 201         return (size10);
 202 }
 203
 204 /* ------------------------------------------------------------------------- */
 205
 206 /*
 207  * Check memory range for valid RAM. A simple memory test determines
 208  * the actually available RAM size between addresses `base' and
 209  * `base + maxsize'. Some (not all) hardware errors are detected:
 210  * - short between address lines
 211  * - short between data lines
 212  */
 213
 214 static long int dram_size (long int mamr_value, long int *base, long int maxsize)
 215 {
 216         volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
 217         volatile memctl8xx_t *memctl = &immap->im_memctl;
 218
 219         memctl->memc_mamr = mamr_value;
 220
 221         return (get_ram_size(base, maxsize));
 222 }
 223 /*-----------------------------------------------------------------------------
 224  * aschex_to_byte --
 225  *-----------------------------------------------------------------------------
 226  */
 227 static unsigned char aschex_to_byte (unsigned char *cp)
 228 {
 229         u_char byte, c;
 230
 231         c = *cp++;
 232
 233         if ((c >= 'A') && (c <= 'F')) {
 234                 c -= 'A';
 235                 c += 10;
 236         } else if ((c >= 'a') && (c <= 'f')) {
 237                 c -= 'a';
 238                 c += 10;
 239         } else {
 240                 c -= '0';
 241         }
 242
 243         byte = c * 16;
 244
 245         c = *cp;
 246
 247         if ((c >= 'A') && (c <= 'F')) {
 248                 c -= 'A';
 249                 c += 10;
 250         } else if ((c >= 'a') && (c <= 'f')) {
 251                 c -= 'a';
 252                 c += 10;
 253         } else {
 254                 c -= '0';
 255         }
 256
 257         byte += c;
 258
 259         return (byte);
 260 }