wdenk | db2f721f | 2003-03-06 00:58:30 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * (C) Copyright 2003 |
| 3 | * EMK Elektronik GmbH <www.emk-elektronik.de> |
| 4 | * Reinhard Meyer <r.meyer@emk-elektronik.de> |
| 5 | * |
| 6 | * Board specific routines for the TOP860 |
| 7 | * |
| 8 | * - initialisation |
| 9 | * - interface to VPD data (mac address, clock speeds) |
| 10 | * - memory controller |
| 11 | * - serial io initialisation |
| 12 | * - ethernet io initialisation |
| 13 | * |
| 14 | * ----------------------------------------------------------------- |
| 15 | * See file CREDITS for list of people who contributed to this |
| 16 | * project. |
| 17 | * |
| 18 | * This program is free software; you can redistribute it and/or |
| 19 | * modify it under the terms of the GNU General Public License as |
| 20 | * published by the Free Software Foundation; either version 2 of |
| 21 | * the License, or (at your option) any later version. |
| 22 | * |
| 23 | * This program is distributed in the hope that it will be useful, |
| 24 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 25 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 26 | * GNU General Public License for more details. |
| 27 | * |
| 28 | * You should have received a copy of the GNU General Public License |
| 29 | * along with this program; if not, write to the Free Software |
| 30 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 31 | * MA 02111-1307 USA |
| 32 | */ |
| 33 | |
| 34 | #include <common.h> |
| 35 | #include <commproc.h> |
| 36 | #include <mpc8xx.h> |
| 37 | |
| 38 | /*****************************************************************************
|
| 39 | * UPM table for 60ns EDO RAM at 25 MHz bus/external clock
|
| 40 | *****************************************************************************/
|
| 41 | static const uint edo_60ns_25MHz_tbl[] = { |
| 42 |
|
| 43 | /* single read (offset 0x00 in upm ram) */
|
| 44 | 0x0ff3fc04,0x08f3fc04,0x00f3fc04,0x00f3fc00,
|
| 45 | 0x33f7fc07,0xfffffc05,0xfffffc05,0xfffffc05,
|
| 46 | /* burst read (offset 0x08 in upm ram) */
|
| 47 | 0x0ff3fc04,0x08f3fc04,0x00f3fc0c,0x0ff3fc40,
|
| 48 | 0x0cf3fc04,0x03f3fc48,0x0cf3fc04,0x03f3fc48,
|
| 49 | 0x0cf3fc04,0x03f3fc00,0x3ff7fc07,0xfffffc05,
|
| 50 | 0xfffffc05,0xfffffc05,0xfffffc05,0xfffffc05,
|
| 51 | /* single write (offset 0x18 in upm ram) */
|
| 52 | 0x0ffffc04,0x08fffc04,0x30fffc00,0xf1fffc07,
|
| 53 | 0xfffffc05,0xfffffc05,0xfffffc05,0xfffffc05,
|
| 54 | /* burst write (offset 0x20 in upm ram) */
|
| 55 | 0x0ffffc04,0x08fffc00,0x00fffc04,0x03fffc4c,
|
| 56 | 0x00fffc00,0x07fffc4c,0x00fffc00,0x0ffffc4c,
|
| 57 | 0x00fffc00,0x3ffffc07,0xfffffc05,0xfffffc05,
|
| 58 | 0xfffffc05,0xfffffc05,0xfffffc05,0xfffffc05,
|
| 59 | /* refresh (offset 0x30 in upm ram) */
|
| 60 | 0xc0fffc04,0x07fffc04,0x0ffffc04,0x0ffffc04,
|
| 61 | 0xfffffc05,0xfffffc05,0xfffffc05,0xfffffc05,
|
| 62 | 0xfffffc05,0xfffffc05,0xfffffc05,0xfffffc05,
|
| 63 | /* exception (offset 0x3C in upm ram) */
|
| 64 | 0xfffffc07,0xfffffc03,0xfffffc05,0xfffffc05,
|
| 65 | }; |
| 66 | |
| 67 | /*****************************************************************************
|
| 68 | * Print Board Identity
|
| 69 | *****************************************************************************/
|
| 70 | int checkboard (void) |
| 71 | { |
| 72 | puts ("Board:"CONFIG_IDENT_STRING"\n"); |
| 73 | return (0); |
| 74 | } |
| 75 | |
| 76 | /*****************************************************************************
|
| 77 | * Initialize DRAM controller
|
| 78 | *****************************************************************************/
|
| 79 | long int initdram (int board_type) |
| 80 | { |
| 81 | volatile immap_t *immap = (immap_t *) CFG_IMMR; |
| 82 | volatile memctl8xx_t *memctl = &immap->im_memctl; |
| 83 | |
| 84 | /* |
| 85 | * Only initialize memory controller when running from FLASH. |
| 86 | * When running from RAM, don't touch it. |
| 87 | */ |
| 88 | if ((ulong) initdram & 0xff000000)
|
| 89 | {
|
| 90 | volatile uint *addr1, *addr2;
|
| 91 | uint i, j;
|
| 92 | |
| 93 | upmconfig (UPMA, (uint *) edo_60ns_25MHz_tbl,
|
| 94 | sizeof (edo_60ns_25MHz_tbl) / sizeof (uint)); |
| 95 | memctl->memc_mptpr = 0x0200; |
| 96 | memctl->memc_mamr = 0x0ca20330; |
| 97 | memctl->memc_or2 = -CFG_DRAM_MAX | OR_CSNT_SAM; |
| 98 | memctl->memc_br2 = CFG_DRAM_BASE | BR_MS_UPMA | BR_V; |
| 99 | /*
|
| 100 | * Do 8 read accesses to DRAM
|
| 101 | */
|
| 102 | addr1 = (volatile uint*) 0;
|
| 103 | addr2 = (volatile uint*) 0x00400000;
|
| 104 | for (i=0, j=0; i<8; i++)
|
| 105 | j = addr1[0];
|
| 106 |
|
| 107 | /*
|
| 108 | * Now check whether we got 4MB or 16MB populated
|
| 109 | */
|
| 110 | addr1[0] = 0x12345678;
|
| 111 | addr1[1] = 0x9abcdef0;
|
| 112 | addr2[0] = 0xfeedc0de;
|
| 113 | addr2[1] = 0x47110815;
|
| 114 | if (addr1[0] == 0xfeedc0de && addr1[1] == 0x47110815)
|
| 115 | {
|
| 116 | /* only 4MB populated */
|
| 117 | memctl->memc_or2 = -(CFG_DRAM_MAX/4) | OR_CSNT_SAM;
|
| 118 | }
|
| 119 | }
|
| 120 |
|
| 121 | return -(memctl->memc_or2 & 0xffff0000); |
| 122 | } |
| 123 |
|
| 124 | /*****************************************************************************
|
| 125 | * otherinits after RAM is there and we are relocated to RAM
|
| 126 | * note: though this is an int function, nobody cares for the result!
|
| 127 | *****************************************************************************/
|
| 128 | int misc_init_r (void) |
| 129 | {
|
| 130 | /* read 'factory' part of EEPROM */
|
| 131 | uchar buf[81];
|
| 132 | uchar *p;
|
| 133 | uint length;
|
| 134 | uint addr;
|
| 135 | uint len;
|
| 136 |
|
| 137 | /* get length first */
|
| 138 | addr = CFG_FACT_OFFSET;
|
| 139 | if (eeprom_read (CFG_I2C_FACT_ADDR, addr, buf, 2))
|
| 140 | {
|
| 141 | bailout:
|
| 142 | printf ("cannot read factory configuration\n");
|
| 143 | printf ("be sure to set ethaddr yourself!\n");
|
| 144 | return 0;
|
| 145 | } |
| 146 | length = buf[0] + (buf[1]<<8);
|
| 147 | addr += 2;
|
| 148 |
|
| 149 | /* sanity check */
|
| 150 | if (length < 20 || length > CFG_FACT_SIZE-2)
|
| 151 | goto bailout;
|
| 152 |
|
| 153 | /* read lines */
|
| 154 | while (length > 0)
|
| 155 | {
|
| 156 | /* read one line */
|
| 157 | len = length > 80 ? 80 : length;
|
| 158 | if (eeprom_read (CFG_I2C_FACT_ADDR, addr, buf, len))
|
| 159 | goto bailout;
|
| 160 | /* mark end of buffer */
|
| 161 | buf[len] = 0;
|
| 162 | /* search end of line */
|
| 163 | for (p=buf; *p && *p != 0x0a; p++) ;
|
| 164 | if (!*p)
|
| 165 | goto bailout;
|
| 166 | *p++ = 0;
|
| 167 | /* advance to next line start */
|
| 168 | length -= p-buf;
|
| 169 | addr += p-buf;
|
| 170 | /*printf ("%s\n", buf);*/
|
| 171 | /* search for our specific entry */
|
| 172 | if (!strncmp ((char *)buf, "[RLA/lan/Ethernet] ", 19))
|
| 173 | {
|
| 174 | setenv ("ethaddr", buf+19); |
| 175 | }
|
| 176 | else if (!strncmp ((char *)buf, "[BOARD/SERIAL] ", 15))
|
| 177 | {
|
| 178 | setenv ("serial#", buf+15); |
| 179 | }
|
| 180 | else if (!strncmp ((char *)buf, "[BOARD/TYPE] ", 13))
|
| 181 | {
|
| 182 | setenv ("board_id", buf+13); |
| 183 | }
|
| 184 | }
|
| 185 | return (0); |
| 186 | } |
| 187 | |