-/*
- * (C) Copyright 2003
- * 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 <command.h>
-#include <asm/addrspace.h>
-#include <asm/danube.h>
-
-#ifdef DANUBE_USE_DDR_RAM
-long int initdram(int board_type)
-{
- return (1024*1024*DANUBE_DDR_RAM_SIZE);
-}
-#else
-extern uint danube_get_cpuclk(void);
-
-static ulong max_sdram_size(void) /* per Chip Select */
-{
- /* The only supported SDRAM data width is 16bit.
- */
-#define CFG_DW 4
-
- /* The only supported number of SDRAM banks is 4.
- */
-#define CFG_NB 4
-
- ulong cfgpb0 = *DANUBE_SDRAM_MC_CFGPB0;
- int cols = cfgpb0 & 0xF;
- int rows = (cfgpb0 & 0xF0) >> 4;
- ulong size = (1 << (rows + cols)) * CFG_DW * CFG_NB;
-
- return size;
-}
-
-/*
- * Check memory range for valid RAM. A simple memory test determines
- * the actually available RAM size between addresses `base' and
- * `base + maxsize'.
- */
-
-static long int dram_size(long int *base, long int maxsize)
-{
- volatile long int *addr;
- ulong cnt, val;
- ulong save[32]; /* to make test non-destructive */
- unsigned char i = 0;
-
- for (cnt = (maxsize / sizeof (long)) >> 1; cnt > 0; cnt >>= 1) {
- addr = base + cnt; /* pointer arith! */
-
- save[i++] = *addr;
- *addr = ~cnt;
- }
-
- /* write 0 to base address */
- addr = base;
- save[i] = *addr;
- *addr = 0;
-
- /* check at base address */
- if ((val = *addr) != 0) {
- *addr = save[i];
- return (0);
- }
-
- for (cnt = 1; cnt < maxsize / sizeof (long); cnt <<= 1) {
- addr = base + cnt; /* pointer arith! */
-
- val = *addr;
- *addr = save[--i];
-
- if (val != (~cnt)) {
- return (cnt * sizeof (long));
- }
- }
- return (maxsize);
-}
-
-long int initdram(int board_type)
-{
- int rows, cols, best_val = *DANUBE_SDRAM_MC_CFGPB0;
- ulong size, max_size = 0;
- ulong our_address;
-
- /* load t9 into our_address */
- asm volatile ("move %0, $25" : "=r" (our_address) :);
-
- /* Can't probe for RAM size unless we are running from Flash.
- * find out whether running from DRAM or Flash.
- */
- if (PHYSADDR(our_address) < PHYSADDR(PHYS_FLASH_1))
- {
- return max_sdram_size();
- }
-
- for (cols = 0x8; cols <= 0xC; cols++)
- {
- for (rows = 0xB; rows <= 0xD; rows++)
- {
- *DANUBE_SDRAM_MC_CFGPB0 = (0x14 << 8) |
- (rows << 4) | cols;
- size = dram_size((ulong *)CFG_SDRAM_BASE,
- max_sdram_size());
-
- if (size > max_size)
- {
- best_val = *DANUBE_SDRAM_MC_CFGPB0;
- max_size = size;
- }
- }
- }
-
- *DANUBE_SDRAM_MC_CFGPB0 = best_val;
- return max_size;
-}
-#endif
-
-int checkboard (void)
-{
- /* No such register in Amazon */
-#if 0
- unsigned long chipid = *AMAZON_MCD_CHIPID;
- int part_num;
-
- puts ("Board: AMAZON ");
- part_num = AMAZON_MCD_CHIPID_PART_NUMBER_GET(chipid);
- switch (part_num) {
- case AMAZON_CHIPID_STANDARD:
- printf ("Standard Version, ");
- break;
- case AMAZON_CHIPID_YANGTSE:
- printf ("Yangtse Version, ");
- break;
- default:
- printf ("Unknown Part Number 0x%x ", part_num);
- break;
- }
-
- printf ("Chip V1.%ld, ", AMAZON_MCD_CHIPID_VERSION_GET(chipid));
-
-
- printf("CPU Speed %d MHz\n", danube_get_cpuclk()/1000000);
-
-#endif
- return 0;
-}
-
-
-/*
- * Disk On Chip (NAND) Millenium initialization.
- * The NAND lives in the CS2* space
- */
-#if (CONFIG_COMMANDS & CFG_CMD_NAND)
-extern void
-nand_probe(ulong physadr);
-
-#define AT91_SMARTMEDIA_BASE 0x40000000 /* physical address to access memory on NCS3 */
-void
-nand_init(void)
-{
- int devtype;
- /* Configure EBU */
-//TODO: should we keep this?
- //Set GPIO23 to be Flash CS1;
- *DANUBE_GPIO_P1_ALTSEL0 = *DANUBE_GPIO_P1_ALTSEL0 | (1<<7);
- *DANUBE_GPIO_P1_ALTSEL1 = *DANUBE_GPIO_P1_ALTSEL1 & ~(1<<7);
- *DANUBE_GPIO_P1_DIR = *DANUBE_GPIO_P1_DIR | (1<<7) ;
- *DANUBE_GPIO_P1_OD = *DANUBE_GPIO_P1_OD | (1<<7) ;
-
- *EBU_ADDR_SEL_1 = (NAND_BASE_ADDRESS&0x1fffff00)|0x31;
- /* byte swap;minimum delay*/
- *EBU_CON_1 = 0x40C155;
- *EBU_NAND_CON = 0x000005F3;
-
- /* Set bus signals to inactive */
- NAND_READY_CLEAR;
-
- NAND_CE_CLEAR;
- nand_probe(NAND_BASE_ADDRESS);
-
-
-
- //nand_probe(AT91_SMARTMEDIA_BASE);
-}
-#endif
-
-
-
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