diff options
Diffstat (limited to 'board/sbc8349/sbc8349.c')
| -rw-r--r-- | board/sbc8349/sbc8349.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/board/sbc8349/sbc8349.c b/board/sbc8349/sbc8349.c index e51eeae065..a647de6b11 100644 --- a/board/sbc8349/sbc8349.c +++ b/board/sbc8349/sbc8349.c @@ -147,6 +147,9 @@ void sdram_init(void) volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; volatile fsl_lbc_t *lbc = &immap->im_lbc; uint *sdram_addr = (uint *)CONFIG_SYS_LBC_SDRAM_BASE; + const u32 lsdmr_common = LSDMR_RFEN | LSDMR_BSMA1516 | LSDMR_RFCR8 | + LSDMR_PRETOACT6 | LSDMR_ACTTORW3 | LSDMR_BL8 | + LSDMR_WRC3 | LSDMR_CL3; puts("\n SDRAM on Local Bus: "); print_size (CONFIG_SYS_LBC_SDRAM_SIZE * 1024 * 1024, "\n"); @@ -156,22 +159,27 @@ void sdram_init(void) */ /* setup mtrpt, lsrt and lbcr for LB bus */ - lbc->lbcr = CONFIG_SYS_LBC_LBCR; - lbc->mrtpr = CONFIG_SYS_LBC_MRTPR; - lbc->lsrt = CONFIG_SYS_LBC_LSRT; + lbc->lbcr = 0x00000000; + /* LB refresh timer prescal, 266MHz/32 */ + lbc->mrtpr = 0x20000000; + /* LB sdram refresh timer, about 6us */ + lbc->lsrt = 0x32000000; asm("sync"); /* * Configure the SDRAM controller Machine Mode Register. */ - lbc->lsdmr = CONFIG_SYS_LBC_LSDMR_5; /* 0x40636733; normal operation */ + /* 0x40636733; normal operation */ + lbc->lsdmr = lsdmr_common | LSDMR_OP_NORMAL; - lbc->lsdmr = CONFIG_SYS_LBC_LSDMR_1; /* 0x68636733; precharge all the banks */ + /* 0x68636733; precharge all the banks */ + lbc->lsdmr = lsdmr_common | LSDMR_OP_PCHALL; asm("sync"); *sdram_addr = 0xff; udelay(100); - lbc->lsdmr = CONFIG_SYS_LBC_LSDMR_2; /* 0x48636733; auto refresh */ + /* 0x48636733; auto refresh */ + lbc->lsdmr = lsdmr_common | LSDMR_OP_ARFRSH; asm("sync"); /*1 times*/ *sdram_addr = 0xff; @@ -199,12 +207,13 @@ void sdram_init(void) udelay(100); /* 0x58636733; mode register write operation */ - lbc->lsdmr = CONFIG_SYS_LBC_LSDMR_4; + lbc->lsdmr = lsdmr_common | LSDMR_OP_MRW; asm("sync"); *sdram_addr = 0xff; udelay(100); - lbc->lsdmr = CONFIG_SYS_LBC_LSDMR_5; /* 0x40636733; normal operation */ + /* 0x40636733; normal operation */ + lbc->lsdmr = lsdmr_common | LSDMR_OP_NORMAL; asm("sync"); *sdram_addr = 0xff; udelay(100); |