diff options
Diffstat (limited to 'board/tqm85xx/sdram.c')
| -rw-r--r-- | board/tqm85xx/sdram.c | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/board/tqm85xx/sdram.c b/board/tqm85xx/sdram.c deleted file mode 100644 index 788a48cd13..0000000000 --- a/board/tqm85xx/sdram.c +++ /dev/null @@ -1,223 +0,0 @@ -/* - * (C) Copyright 2005 - * Stefan Roese, DENX Software Engineering, sr@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 <asm/processor.h> -#include <asm/immap_85xx.h> -#include <asm/processor.h> -#include <asm/mmu.h> - -struct sdram_conf_s { - unsigned long size; - unsigned long reg; -}; - -typedef struct sdram_conf_s sdram_conf_t; - -sdram_conf_t ddr_cs_conf[] = { - {(512 << 20), 0x80000202}, /* 512MB, 14x10(4) */ - {(256 << 20), 0x80000102}, /* 256MB, 13x10(4) */ - {(128 << 20), 0x80000101}, /* 128MB, 13x9(4) */ - {(64 << 20), 0x80000001}, /* 64MB, 12x9(4) */ -}; - -#define N_DDR_CS_CONF (sizeof(ddr_cs_conf) / sizeof(ddr_cs_conf[0])) - -int cas_latency(void); - -/* - * Autodetect onboard DDR SDRAM on 85xx platforms - * - * NOTE: Some of the hardcoded values are hardware dependant, - * so this should be extended for other future boards - * using this routine! - */ -long int sdram_setup(int casl) -{ - int i; - volatile ccsr_ddr_t *ddr = (void *)(CFG_MPC85xx_DDR_ADDR); - unsigned long cfg_ddr_timing1; - unsigned long cfg_ddr_mode; - - /* - * Disable memory controller. - */ - ddr->cs0_config = 0; - ddr->sdram_cfg = 0; - - switch (casl) { - case 20: - cfg_ddr_timing1 = 0x47405331 | (3 << 16); - cfg_ddr_mode = 0x40020002 | (2 << 4); - break; - - case 25: - cfg_ddr_timing1 = 0x47405331 | (4 << 16); - cfg_ddr_mode = 0x40020002 | (6 << 4); - break; - - case 30: - default: - cfg_ddr_timing1 = 0x47405331 | (5 << 16); - cfg_ddr_mode = 0x40020002 | (3 << 4); - break; - } - - ddr->cs0_bnds = (ddr_cs_conf[0].size - 1) >> 24; - ddr->cs0_config = ddr_cs_conf[0].reg; - ddr->timing_cfg_1 = cfg_ddr_timing1; - ddr->timing_cfg_2 = 0x00000800; /* P9-45,may need tuning */ - ddr->sdram_mode = cfg_ddr_mode; - ddr->sdram_interval = 0x05160100; /* autocharge,no open page */ - ddr->err_disable = 0x0000000D; - - asm ("sync;isync;msync"); - udelay(1000); - - ddr->sdram_cfg = 0xc2000000; /* unbuffered,no DYN_PWR */ - asm ("sync; isync; msync"); - udelay(1000); - - for (i=0; i<N_DDR_CS_CONF; i++) { - ddr->cs0_config = ddr_cs_conf[i].reg; - - if (get_ram_size(0, ddr_cs_conf[i].size) == ddr_cs_conf[i].size) { - /* - * OK, size detected -> all done - */ - return ddr_cs_conf[i].size; - } - } - - return 0; /* nothing found ! */ -} - -void board_add_ram_info(int use_default) -{ - int casl; - - if (use_default) - casl = CONFIG_DDR_DEFAULT_CL; - else - casl = cas_latency(); - - puts(" (CL="); - switch (casl) { - case 20: - puts("2)"); - break; - - case 25: - puts("2.5)"); - break; - - case 30: - puts("3)"); - break; - } -} - -long int initdram (int board_type) -{ - long dram_size = 0; - int casl; - -#if defined(CONFIG_DDR_DLL) - /* - * This DLL-Override only used on TQM8540 and TQM8560 - */ - { - volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR); - int i,x; - - x = 10; - - /* - * Work around to stabilize DDR DLL - */ - gur->ddrdllcr = 0x81000000; - asm("sync;isync;msync"); - udelay (200); - while (gur->ddrdllcr != 0x81000100) { - gur->devdisr = gur->devdisr | 0x00010000; - asm("sync;isync;msync"); - for (i=0; i<x; i++) - ; - gur->devdisr = gur->devdisr & 0xfff7ffff; - asm("sync;isync;msync"); - x++; - } - } -#endif - - casl = cas_latency(); - dram_size = sdram_setup(casl); - if ((dram_size == 0) && (casl != CONFIG_DDR_DEFAULT_CL)) { - /* - * Try again with default CAS latency - */ - puts("Problem with CAS lantency"); - board_add_ram_info(1); - puts(", using default CL!\n"); - casl = CONFIG_DDR_DEFAULT_CL; - dram_size = sdram_setup(casl); - puts(" "); - } - - return dram_size; -} - -#if defined(CFG_DRAM_TEST) -int testdram (void) -{ - uint *pstart = (uint *) CFG_MEMTEST_START; - uint *pend = (uint *) CFG_MEMTEST_END; - uint *p; - - printf ("SDRAM test phase 1:\n"); - for (p = pstart; p < pend; p++) - *p = 0xaaaaaaaa; - - for (p = pstart; p < pend; p++) { - if (*p != 0xaaaaaaaa) { - printf ("SDRAM test fails at: %08x\n", (uint) p); - return 1; - } - } - - printf ("SDRAM test phase 2:\n"); - for (p = pstart; p < pend; p++) - *p = 0x55555555; - - for (p = pstart; p < pend; p++) { - if (*p != 0x55555555) { - printf ("SDRAM test fails at: %08x\n", (uint) p); - return 1; - } - } - - printf ("SDRAM test passed.\n"); - return 0; -} -#endif |