diff options
Diffstat (limited to 'board/ip860/ip860.c')
| -rw-r--r-- | board/ip860/ip860.c | 111 |
1 files changed, 103 insertions, 8 deletions
diff --git a/board/ip860/ip860.c b/board/ip860/ip860.c index 11f3327..a20c211 100644 --- a/board/ip860/ip860.c +++ b/board/ip860/ip860.c @@ -28,7 +28,8 @@ /* ------------------------------------------------------------------------- */ static long int dram_size (long int, long int *, long int); - +unsigned long ip860_get_dram_size(void); +unsigned long ip860_get_clk_freq (void); /* ------------------------------------------------------------------------- */ #define _NOT_USED_ 0xFFFFFFFF @@ -82,8 +83,22 @@ const uint sdram_table[] = { _NOT_USED_, _NOT_USED_, _NOT_USED_, }; + /* ------------------------------------------------------------------------- */ +int board_pre_init(void) +{ + volatile immap_t *immap = (immap_t *)CFG_IMMR; + volatile memctl8xx_t *memctl = &immap->im_memctl; + +/* init BCSR chipselect line for ip860_get_clk_freq() and ip860_get_dram_size() */ + memctl->memc_or4 = CFG_OR4; + memctl->memc_br4 = CFG_BR4; + return 0; +} + + +/* ------------------------------------------------------------------------- */ /* * Check Board Identity: @@ -127,6 +142,7 @@ long int initdram (int board_type) volatile immap_t *immap = (immap_t *) CFG_IMMR; volatile memctl8xx_t *memctl = &immap->im_memctl; long int size; + ulong refresh_val; upmconfig (UPMA, (uint *) sdram_table, sizeof (sdram_table) / sizeof (uint)); @@ -134,7 +150,17 @@ long int initdram (int board_type) /* * Preliminary prescaler for refresh */ - memctl->memc_mptpr = 0x0400; + if (ip860_get_clk_freq() == 50000000) + { + memctl->memc_mptpr = 0x0400; + refresh_val = 0xC3000000; + } + else + { + memctl->memc_mptpr = 0x0200; + refresh_val = 0x9C000000; + } + memctl->memc_mar = 0x00000088; @@ -151,18 +177,22 @@ long int initdram (int board_type) /* perform SDRAM initializsation sequence */ - memctl->memc_mamr = 0xC3804114; - memctl->memc_mcr = 0x80004105; /* run precharge pattern from loc 5 */ - udelay (1); - memctl->memc_mamr = 0xC3804118; - memctl->memc_mcr = 0x80004130; /* run refresh pattern 8 times */ + memctl->memc_mamr = 0x00804114 | refresh_val; + memctl->memc_mcr = 0x80004105; /* run precharge pattern from loc 5 */ + udelay(1); + memctl->memc_mamr = 0x00804118 | refresh_val; + memctl->memc_mcr = 0x80004130; /* run refresh pattern 8 times */ + udelay (1000); /* * Check SDRAM Memory Size */ - size = dram_size (CFG_MAMR, (ulong *) SDRAM_BASE, SDRAM_MAX_SIZE); + if (ip860_get_dram_size() == 16) + size = dram_size (refresh_val | 0x00804114, (ulong *)SDRAM_BASE, SDRAM_MAX_SIZE); + else + size = dram_size (refresh_val | 0x00906114, (ulong *)SDRAM_BASE, SDRAM_MAX_SIZE); udelay (1000); @@ -291,3 +321,68 @@ void reset_phy (void) } /* ------------------------------------------------------------------------- */ + +unsigned long ip860_get_clk_freq(void) +{ + volatile ip860_bcsr_t *bcsr = (ip860_bcsr_t *)BCSR_BASE; + ulong temp; + uchar sysclk; + + if ((bcsr->bd_status & 0x80) == 0x80) /* bd_rev valid ? */ + sysclk = (bcsr->bd_rev & 0x18) >> 3; + else + sysclk = 0x00; + + switch (sysclk) + { + case 0x00: + temp = 50000000; + break; + + case 0x01: + temp = 80000000; + break; + + default: + temp = 50000000; + break; + } + + return (temp); + +} + + +/* ------------------------------------------------------------------------- */ + +unsigned long ip860_get_dram_size(void) +{ + volatile ip860_bcsr_t *bcsr = (ip860_bcsr_t *)BCSR_BASE; + ulong temp; + uchar dram_size; + + if ((bcsr->bd_status & 0x80) == 0x80) /* bd_rev valid ? */ + dram_size = (bcsr->bd_rev & 0xE0) >> 5; + else + dram_size = 0x00; /* default is 16 MB */ + + switch (dram_size) + { + case 0x00: + temp = 16; + break; + + case 0x01: + temp = 32; + break; + + default: + temp = 16; + break; + } + + return (temp); + +} + +/* ------------------------------------------------------------------------- */ |