mirror of
https://github.com/AsahiLinux/u-boot
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265 lines
6.5 KiB
C
265 lines
6.5 KiB
C
/*
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* (C) Copyright 2001
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* Stäubli Faverges - <www.staubli.com>
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* Pierre AUBERT p.aubert@staubli.com
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* U-Boot port on RPXClassic LF (CLLF_BW31) board
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*
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* (C) Copyright 2000
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <i2c.h>
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#include <config.h>
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#include <mpc8xx.h>
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/* ------------------------------------------------------------------------- */
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static long int dram_size (long int, long int *, long int);
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static unsigned char aschex_to_byte (unsigned char *cp);
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/* ------------------------------------------------------------------------- */
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#define _NOT_USED_ 0xFFFFCC25
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const uint sdram_table[] =
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{
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/*
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* Single Read. (Offset 00h in UPMA RAM)
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*/
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0xCFFFCC24, 0x0FFFCC04, 0X0CAFCC04, 0X03AFCC08,
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0x3FBFCC27, /* last */
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_NOT_USED_, _NOT_USED_, _NOT_USED_,
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/*
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* Burst Read. (Offset 08h in UPMA RAM)
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*/
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0xCFFFCC24, 0x0FFFCC04, 0x0CAFCC84, 0x03AFCC88,
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0x3FBFCC27, /* last */
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_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
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_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
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_NOT_USED_, _NOT_USED_, _NOT_USED_,
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/*
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* Single Write. (Offset 18h in UPMA RAM)
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*/
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0xCFFFCC24, 0x0FFFCC04, 0x0CFFCC04, 0x03FFCC00,
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0x3FFFCC27, /* last */
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_NOT_USED_, _NOT_USED_, _NOT_USED_,
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/*
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* Burst Write. (Offset 20h in UPMA RAM)
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*/
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0xCFFFCC24, 0x0FFFCC04, 0x0CFFCC80, 0x03FFCC8C,
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0x0CFFCC00, 0x33FFCC27, /* last */
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_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
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_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
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_NOT_USED_, _NOT_USED_,
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/*
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* Refresh. (Offset 30h in UPMA RAM)
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*/
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0xC0FFCC24, 0x03FFCC24, 0x0FFFCC24, 0x0FFFCC24,
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0x3FFFCC27, /* last */
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_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
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_NOT_USED_, _NOT_USED_, _NOT_USED_,
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/*
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* Exception. (Offset 3Ch in UPMA RAM)
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*/
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_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_
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};
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/* ------------------------------------------------------------------------- */
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/*
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* Check Board Identity:
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*/
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int checkboard (void)
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{
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puts ("Board: RPXClassic\n");
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return (0);
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}
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/*-----------------------------------------------------------------------------
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* board_get_enetaddr -- Read the MAC Address in the I2C EEPROM
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*-----------------------------------------------------------------------------
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*/
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void board_get_enetaddr (uchar * enet)
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{
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int i;
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char buff[256], *cp;
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/* Initialize I2C */
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i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
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/* Read 256 bytes in EEPROM */
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i2c_read (0x54, 0, 1, buff, 128);
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i2c_read (0x54, 128, 1, buff + 128, 128);
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/* Retrieve MAC address in buffer (key EA) */
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for (cp = buff;;) {
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if (cp[0] == 'E' && cp[1] == 'A') {
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cp += 3;
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/* Read MAC address */
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for (i = 0; i < 6; i++, cp += 2) {
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enet[i] = aschex_to_byte (cp);
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}
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}
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/* Scan to the end of the record */
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while ((*cp != '\n') && (*cp != (char)0xff)) {
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cp++;
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}
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/* If the next character is a \n, 0 or ff, we are done. */
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cp++;
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if ((*cp == '\n') || (*cp == 0) || (*cp == (char)0xff))
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break;
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}
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#ifdef CONFIG_FEC_ENET
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/* The MAC address is the same as normal ethernet except the 3rd byte */
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/* (See the E.P. Planet Core Overview manual */
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enet[3] |= 0x80;
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#endif
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printf ("MAC address = %02x:%02x:%02x:%02x:%02x:%02x\n",
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enet[0], enet[1], enet[2], enet[3], enet[4], enet[5]);
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}
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void rpxclassic_init (void)
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{
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/* Enable NVRAM */
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*((uchar *) BCSR0) |= BCSR0_ENNVRAM;
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#ifdef CONFIG_FEC_ENET
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/* Validate the fast ethernet tranceiver */
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*((volatile uchar *) BCSR2) &= ~BCSR2_MIICTL;
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*((volatile uchar *) BCSR2) &= ~BCSR2_MIIPWRDWN;
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*((volatile uchar *) BCSR2) |= BCSR2_MIIRST;
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*((volatile uchar *) BCSR2) |= BCSR2_MIIPWRDWN;
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#endif
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}
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/* ------------------------------------------------------------------------- */
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long int initdram (int board_type)
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{
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volatile immap_t *immap = (immap_t *) CFG_IMMR;
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volatile memctl8xx_t *memctl = &immap->im_memctl;
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long int size10;
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upmconfig (UPMA, (uint *) sdram_table,
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sizeof (sdram_table) / sizeof (uint));
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/* Refresh clock prescalar */
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memctl->memc_mptpr = CFG_MPTPR;
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memctl->memc_mar = 0x00000000;
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/* Map controller banks 1 to the SDRAM bank */
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memctl->memc_or1 = CFG_OR1_PRELIM;
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memctl->memc_br1 = CFG_BR1_PRELIM;
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memctl->memc_mamr = CFG_MAMR_10COL & (~(MAMR_PTAE)); /* no refresh yet */
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udelay (200);
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/* perform SDRAM initializsation sequence */
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memctl->memc_mcr = 0x80002230; /* SDRAM bank 0 - refresh twice */
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udelay (1);
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memctl->memc_mamr |= MAMR_PTAE; /* enable refresh */
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udelay (1000);
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/* Check Bank 0 Memory Size
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* try 10 column mode
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*/
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size10 = dram_size (CFG_MAMR_10COL, (ulong *) SDRAM_BASE_PRELIM,
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SDRAM_MAX_SIZE);
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return (size10);
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}
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/* ------------------------------------------------------------------------- */
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/*
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* Check memory range for valid RAM. A simple memory test determines
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* the actually available RAM size between addresses `base' and
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* `base + maxsize'. Some (not all) hardware errors are detected:
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* - short between address lines
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* - short between data lines
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*/
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static long int dram_size (long int mamr_value, long int *base, long int maxsize)
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{
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volatile immap_t *immap = (immap_t *) CFG_IMMR;
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volatile memctl8xx_t *memctl = &immap->im_memctl;
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memctl->memc_mamr = mamr_value;
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return (get_ram_size(base, maxsize));
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}
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/*-----------------------------------------------------------------------------
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* aschex_to_byte --
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*-----------------------------------------------------------------------------
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*/
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static unsigned char aschex_to_byte (unsigned char *cp)
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{
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u_char byte, c;
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c = *cp++;
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if ((c >= 'A') && (c <= 'F')) {
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c -= 'A';
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c += 10;
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} else if ((c >= 'a') && (c <= 'f')) {
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c -= 'a';
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c += 10;
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} else {
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c -= '0';
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}
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byte = c * 16;
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c = *cp;
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if ((c >= 'A') && (c <= 'F')) {
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c -= 'A';
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c += 10;
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} else if ((c >= 'a') && (c <= 'f')) {
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c -= 'a';
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c += 10;
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} else {
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c -= '0';
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}
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byte += c;
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return (byte);
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}
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