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Diffstat (limited to 'board/eric/eric.c')
| -rw-r--r-- | board/eric/eric.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/board/eric/eric.c b/board/eric/eric.c new file mode 100644 index 0000000..17fe6ac --- /dev/null +++ b/board/eric/eric.c @@ -0,0 +1,195 @@ +/* + * (C) Copyright 2001 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * 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 <i2c.h> +#include "eric.h" +#include <asm/processor.h> + +#define IBM405GP_GPIO0_OR 0xef600700 /* GPIO Output */ +#define IBM405GP_GPIO0_TCR 0xef600704 /* GPIO Three-State Control */ +#define IBM405GP_GPIO0_ODR 0xef600718 /* GPIO Open Drain */ +#define IBM405GP_GPIO0_IR 0xef60071c /* GPIO Input */ + +int board_pre_init (void) +{ + + /*-------------------------------------------------------------------------+ + | Interrupt controller setup for the ERIC board. + | Note: IRQ 0-15 405GP internally generated; active high; level sensitive + | IRQ 16 405GP internally generated; active low; level sensitive + | IRQ 17-24 RESERVED + | IRQ 25 (EXT IRQ 0) FLASH; active low; level sensitive + | IRQ 26 (EXT IRQ 1) PHY ; active low; level sensitive + | IRQ 27 (EXT IRQ 2) HOST FAIL, active low; level sensitive + | indicates NO Power or HOST RESET active + | check GPIO7 (HOST RESET#) and GPIO8 (NO Power#) + | for real IRQ source + | IRQ 28 (EXT IRQ 3) HOST; active high; level sensitive + | IRQ 29 (EXT IRQ 4) PCI INTC#; active low; level sensitive + | IRQ 30 (EXT IRQ 5) PCI INTB#; active low; level sensitive + | IRQ 31 (EXT IRQ 6) PCI INTA#; active low; level sensitive + | -> IRQ6 Pin is NOW GPIO23 and can be activateted by setting + | IBM405GP_GPIO0_TCR Bit 0 = 1 (driving the output as defined in IBM405GP_GPIO0_OR, + | else tristate) + | Note for ERIC board: + | An interrupt taken for the HOST (IRQ 28) indicates that + | the HOST wrote a "1" to one of the following locations + | - VGA CRT_GPIO0 (if R1216 is loaded) + | - VGA CRT_GPIO1 (if R1217 is loaded) + | + +-------------------------------------------------------------------------*/ + + mtdcr (uicsr, 0xFFFFFFFF); /* clear all ints */ + mtdcr (uicer, 0x00000000); /* disable all ints */ + mtdcr (uiccr, 0x00000000); /* set all SMI to be non-critical */ + mtdcr (uicpr, 0xFFFFFF88); /* set int polarities; IRQ3 to 1 */ + mtdcr (uictr, 0x10000000); /* set int trigger levels, UART0 is EDGE */ + mtdcr (uicvcr, 0x00000001); /* set vect base=0,INT0 highest priority */ + mtdcr (uicsr, 0xFFFFFFFF); /* clear all ints */ + + mtdcr (cntrl0, 0x00002000); /* set IRQ6 as GPIO23 to generate an interrupt request to the PCP2PCI bridge */ + + out32 (IBM405GP_GPIO0_OR, 0x60000000); /*fixme is SMB_INT high or low active??; IRQ6 is GPIO23 output */ + out32 (IBM405GP_GPIO0_TCR, 0x7E400000); + + return 0; +} + + +/* ------------------------------------------------------------------------- */ + +/* + * Check Board Identity: + */ + +int checkboard (void) +{ + unsigned char *s = getenv ("serial#"); + unsigned char *e; + + puts ("Board: "); + + if (!s || strncmp (s, "ERIC", 9)) { + puts ("### No HW ID - assuming ERIC"); + } else { + for (e = s; *e; ++e) { + if (*e == ' ') + break; + } + + for (; s < e; ++s) { + putc (*s); + } + } + + + putc ('\n'); + + return (0); +} + + +/* ------------------------------------------------------------------------- */ +/* ------------------------------------------------------------------------- */ +/* ------------------------------------------------------------------------- */ +/* + initdram(int board_type) reads EEPROM via I2c. EEPROM contains all of + the necessary info for SDRAM controller configuration +*/ +/* ------------------------------------------------------------------------- */ +/* ------------------------------------------------------------------------- */ +long int initdram (int board_type) +{ +#ifndef CONFIG_ERIC + int i; + unsigned char datain[128]; + int TotalSize; +#endif + + +#ifdef CONFIG_ERIC + /* + * we have no EEPROM on ERIC + * so let init.S do the init job for SDRAM + * and simply return 32MByte here + */ + return (CFG_SDRAM_SIZE * 1024 * 1024); +#else + + /* Read Serial Presence Detect Information */ + for (i = 0; i < 128; i++) + datain[i] = 127; + i2c_send (SPD_EEPROM_ADDRESS, 0, 1, datain, 128); + printf ("\nReading DIMM...\n"); +#if 0 + for (i = 0; i < 128; i++) { + printf ("%d=0x%x ", i, datain[i]); + if (((i + 1) % 10) == 0) + printf ("\n"); + } + printf ("\n"); +#endif + + /*****************************/ + /* Retrieve interesting data */ + /*****************************/ + /* size of a SDRAM bank */ + /* Number of bytes per side / number of banks per side */ + if (datain[31] == 0x08) + TotalSize = 32; + else if (datain[31] == 0x10) + TotalSize = 64; + else { + printf ("IIC READ ERROR!!!\n"); + TotalSize = 32; + } + + /* single-sided DIMM or double-sided DIMM? */ + if (datain[5] != 1) { + /* double-sided DIMM => SDRAM banks 0..3 are valid */ + printf ("double-sided DIMM\n"); + TotalSize *= 2; + } + /* else single-sided DIMM => SDRAM bank 0 and bank 2 are valid */ + else { + printf ("single-sided DIMM\n"); + } + + + /* return size in Mb unit => *(1024*1024) */ + return (TotalSize * 1024 * 1024); +#endif +} + +/* ------------------------------------------------------------------------- */ + +int testdram (void) +{ + /* TODO: XXX XXX XXX */ + printf ("test: xxx MB - ok\n"); + + return (0); +} + +/* ------------------------------------------------------------------------- */ |