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/*
* Copyright (C) 2005 Arabella Software Ltd.
* Yuli Barcohen <yuli@arabellasw.com>
*
* Support for Embedded Planet EP88x boards.
* Tested on EP88xC with MPC885 CPU, 64MB SDRAM and 16MB flash.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <mpc8xx.h>
/*
* SDRAM uses two Micron chips.
* Minimal CPU frequency is 40MHz.
*/
static uint sdram_table[] = {
/* Single read (offset 0x00 in UPM RAM) */
0xEFCBCC04, 0x0F37C804, 0x0EEEC004, 0x01B98404,
0x1FF74C00, 0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05,
/* Burst read (offset 0x08 in UPM RAM) */
0xEFCBCC04, 0x0F37C804, 0x0EEEC004, 0x00BDC404,
0x00FFCC00, 0x00FFCC00, 0x01FB8C00, 0x1FF74C00,
0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05,
0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05,
/* Single write (offset 0x18 in UPM RAM) */
0xEFCBCC04, 0x0F37C804, 0x0EEE8002, 0x01B90404,
0x1FF74C05, 0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05,
/* Burst write (offset 0x20 in UPM RAM) */
0xEFCBCC04, 0x0F37C804, 0x0EEE8000, 0x00BD4400,
0x00FFCC00, 0x00FFCC02, 0x01FB8C04, 0x1FF74C05,
0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05,
0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05, 0xFFFFCC05,
/* Refresh (offset 0x30 in UPM RAM) */
0xEFFACC04, 0x0FF5CC04, 0x0FFFCC04, 0x1FFFCC04,
0xFFFFCC05, 0xFFFFCC05, 0xEFFB8C34, 0x0FF74C34,
0x0FFACCB4, 0x0FF5CC34, 0x0FFFC034, 0x0FFFC0B4,
/* Exception (offset 0x3C in UPM RAM) */
0x0FEA8034, 0x1FB54034, 0xFFFFCC34, 0xFFFFCC05
};
int board_early_init_f (void)
{
vu_char *bcsr = (vu_char *)CFG_BCSR;
bcsr[0] |= 0x0C; /* Turn the LEDs off */
bcsr[2] |= 0x08; /* Enable flash WE# line - necessary for
flash detection by CFI driver
*/
#if defined(CONFIG_8xx_CONS_SMC1)
bcsr[6] |= 0x10; /* Enables RS-232 transceiver */
#endif
#if defined(CONFIG_8xx_CONS_SCC2)
bcsr[7] |= 0x10; /* Enables RS-232 transceiver */
#endif
#ifdef CONFIG_ETHER_ON_FEC1
bcsr[8] |= 0xC0; /* Enable Ethernet 1 PHY */
#endif
#ifdef CONFIG_ETHER_ON_FEC2
bcsr[8] |= 0x30; /* Enable Ethernet 2 PHY */
#endif
return 0;
}
long int initdram (int board_type)
{
long int msize;
volatile immap_t *immap = (volatile immap_t *)CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
upmconfig(UPMA, sdram_table, sizeof(sdram_table) / sizeof(uint));
/* Configure SDRAM refresh */
memctl->memc_mptpr = MPTPR_PTP_DIV2; /* BRGCLK/2 */
memctl->memc_mamr = (65 << 24) | CFG_MAMR; /* No refresh */
udelay(100);
/* Run MRS pattern from location 0x36 */
memctl->memc_mar = 0x88;
memctl->memc_mcr = 0x80002236;
udelay(100);
memctl->memc_mamr |= MAMR_PTAE; /* Enable refresh */
memctl->memc_or1 = ~(CFG_SDRAM_MAX_SIZE - 1) | OR_CSNT_SAM;
memctl->memc_br1 = CFG_SDRAM_BASE | BR_PS_32 | BR_MS_UPMA | BR_V;
msize = get_ram_size(CFG_SDRAM_BASE, CFG_SDRAM_MAX_SIZE);
memctl->memc_or1 |= ~(msize - 1);
return msize;
}
int checkboard( void )
{
vu_char *bcsr = (vu_char *)CFG_BCSR;
puts("Board: ");
switch (bcsr[15]) {
case 0xE7:
puts("EP88xC 1.0");
break;
default:
printf("unknown ID=%02X", bcsr[15]);
}
printf(" CPLD revision %d\n", bcsr[14]);
return 0;
}
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