diff options
Diffstat (limited to 'cpu/ppc4xx/sdram.c')
| -rw-r--r-- | cpu/ppc4xx/sdram.c | 35 |
1 files changed, 26 insertions, 9 deletions
diff --git a/cpu/ppc4xx/sdram.c b/cpu/ppc4xx/sdram.c index f06038e..d520cd3 100644 --- a/cpu/ppc4xx/sdram.c +++ b/cpu/ppc4xx/sdram.c @@ -1,5 +1,5 @@ /* - * (C) Copyright 2005-2006 + * (C) Copyright 2005-2007 * Stefan Roese, DENX Software Engineering, sr@denx.de. * * (C) Copyright 2006 @@ -32,9 +32,9 @@ #include <asm/processor.h> #include "sdram.h" - #ifdef CONFIG_SDRAM_BANK0 +#ifndef CONFIG_440 #ifndef CFG_SDRAM_TABLE sdram_conf_t mb0cf[] = { @@ -50,9 +50,6 @@ sdram_conf_t mb0cf[] = CFG_SDRAM_TABLE; #define N_MB0CF (sizeof(mb0cf) / sizeof(mb0cf[0])) - -#ifndef CONFIG_440 - #ifdef CFG_SDRAM_CASL static ulong ns2clks(ulong ns) { @@ -221,6 +218,26 @@ void sdram_init(void) #else /* CONFIG_440 */ +/* + * Define some default values. Those can be overwritten in the + * board config file. + */ + +#ifndef CFG_SDRAM_TABLE +sdram_conf_t mb0cf[] = { + {(256 << 20), 13, 0x000C4001}, /* 256MB mode 3, 13x10(4) */ + {(64 << 20), 12, 0x00082001} /* 64MB mode 2, 12x9(4) */ +}; +#else +sdram_conf_t mb0cf[] = CFG_SDRAM_TABLE; +#endif + +#ifndef CFG_SDRAM0_TR0 +#define CFG_SDRAM0_TR0 0x41094012 +#endif + +#define N_MB0CF (sizeof(mb0cf) / sizeof(mb0cf[0])) + #define NUM_TRIES 64 #define NUM_READS 10 @@ -295,7 +312,6 @@ static void sdram_tr1_set(int ram_address, int* tr1_value) *tr1_value = (first_good + last_bad) / 2; } - #ifdef CONFIG_SDRAM_ECC static void ecc_init(ulong start, ulong size) { @@ -351,7 +367,8 @@ long int initdram(int board_type) int i; int tr1_bank1; -#if defined(CONFIG_440GX) || defined(CONFIG_440EP) || defined(CONFIG_440GR) || defined(CONFIG_440SP) +#if defined(CONFIG_440GX) || defined(CONFIG_440EP) || \ + defined(CONFIG_440GR) || defined(CONFIG_440SP) /* * Soft-reset SDRAM controller. */ @@ -378,9 +395,9 @@ long int initdram(int board_type) * Following for CAS Latency = 2.5 @ 133 MHz PLB */ mtsdram(mem_b0cr, mb0cf[i].reg); - mtsdram(mem_tr0, 0x41094012); + mtsdram(mem_tr0, CFG_SDRAM0_TR0); mtsdram(mem_tr1, 0x80800800); /* SS=T2 SL=STAGE 3 CD=1 CT=0x00*/ - mtsdram(mem_rtr, 0x7e000000); /* Interval 15.20µs @ 133MHz PLB*/ + mtsdram(mem_rtr, 0x04100000); /* Interval 7.8µs @ 133MHz PLB */ mtsdram(mem_cfg1, 0x00000000); /* Self-refresh exit, disable PM*/ udelay(400); /* Delay 200 usecs (min) */ |