diff options
Diffstat (limited to 'board/amcc/bamboo/bamboo.c')
| -rw-r--r-- | board/amcc/bamboo/bamboo.c | 57 |
1 files changed, 38 insertions, 19 deletions
diff --git a/board/amcc/bamboo/bamboo.c b/board/amcc/bamboo/bamboo.c index d02add5..53bf735 100644 --- a/board/amcc/bamboo/bamboo.c +++ b/board/amcc/bamboo/bamboo.c @@ -31,6 +31,8 @@ void ext_bus_cntlr_init(void); void configure_ppc440ep_pins(void); int is_nand_selected(void); +unsigned char cfg_simulate_spd_eeprom[128]; + gpio_param_s gpio_tab[GPIO_GROUP_MAX][GPIO_MAX]; #if 0 { /* GPIO Alternate1 Alternate2 Alternate3 */ @@ -380,7 +382,7 @@ int checkboard(void) /************************************************************************* * - * fixed_sdram_init -- Bamboo has one bank onboard sdram (plus DIMM) + * init_spd_array -- Bamboo has one bank onboard sdram (plus DIMM) * * Fixed memory is composed of : * MT46V16M16TG-75 from Micron (x 2), 256Mb, 16 M x16, DDR266, @@ -397,24 +399,40 @@ int checkboard(void) * PLB @ 133 MHz * ************************************************************************/ -void fixed_sdram_init(void) +static void init_spd_array(void) { - /* - * clear this first, if the DDR is enabled by a debugger - * then you can not make changes. - */ - mtsdram(mem_cfg0, 0x00000000); /* Disable EEC */ + cfg_simulate_spd_eeprom[8] = 0x04; /* 2.5 Volt */ + cfg_simulate_spd_eeprom[2] = 0x07; /* DDR ram */ - /*-------------------------------------------------------------------- - * Setup for board-specific specific mem - *------------------------------------------------------------------*/ - /* - * Following for CAS Latency = 2.5 @ 133 MHz PLB - */ - mtsdram(mem_b0cr, 0x00082001); - mtsdram(mem_b1cr, 0x00000000); - mtsdram(mem_b2cr, 0x00000000); - mtsdram(mem_b3cr, 0x00000000); +#ifdef CONFIG_DDR_ECC + cfg_simulate_spd_eeprom[11] = 0x02; /* ECC ON : 02 OFF : 00 */ + cfg_simulate_spd_eeprom[31] = 0x08; /* bankSizeID: 32MB */ + cfg_simulate_spd_eeprom[3] = 0x0C; /* num Row Addr: 12 */ +#else + cfg_simulate_spd_eeprom[11] = 0x00; /* ECC ON : 02 OFF : 00 */ + cfg_simulate_spd_eeprom[31] = 0x10; /* bankSizeID: 64MB */ + cfg_simulate_spd_eeprom[3] = 0x0D; /* num Row Addr: 13 */ +#endif + + cfg_simulate_spd_eeprom[4] = 0x09; /* numColAddr: 9 */ + cfg_simulate_spd_eeprom[5] = 0x01; /* numBanks: 1 */ + cfg_simulate_spd_eeprom[0] = 0x80; /* number of SPD bytes used: 128 */ + cfg_simulate_spd_eeprom[1] = 0x08; /* total number bytes in SPD device = 256 */ + cfg_simulate_spd_eeprom[21] = 0x00; /* not registered: 0 registered : 0x02*/ + cfg_simulate_spd_eeprom[6] = 0x20; /* Module data width: 32 bits */ + cfg_simulate_spd_eeprom[7] = 0x00; /* Module data width continued: +0 */ + cfg_simulate_spd_eeprom[15] = 0x01; /* wcsbc = 1 */ + cfg_simulate_spd_eeprom[27] = 0x50; /* tRpNs = 20 ns */ + cfg_simulate_spd_eeprom[29] = 0x50; /* tRcdNs = 20 ns */ + + cfg_simulate_spd_eeprom[30] = 45; /* tRasNs */ + + cfg_simulate_spd_eeprom[18] = 0x0C; /* casBit (2,2.5) */ + + cfg_simulate_spd_eeprom[9] = 0x75; /* SDRAM Cycle Time (cas latency 2.5) = 7.5 ns */ + cfg_simulate_spd_eeprom[23] = 0xA0; /* SDRAM Cycle Time (cas latency 2) = 10 ns */ + cfg_simulate_spd_eeprom[25] = 0x00; /* SDRAM Cycle Time (cas latency 1.5) = N.A */ + cfg_simulate_spd_eeprom[12] = 0x82; /* refresh Rate Type: Normal (15.625us) + Self refresh */ } long int initdram (int board_type) @@ -422,9 +440,10 @@ long int initdram (int board_type) long dram_size = 0; /* - * First init bank0 (onboard sdram) and then configure the DIMM-slots + * First write simulated values in eeprom array for onboard bank 0 */ - fixed_sdram_init(); + init_spd_array(); + dram_size = spd_sdram (0); return dram_size; |