diff options
Diffstat (limited to 'cpu')
| -rw-r--r-- | cpu/mpc512x/fixed_sdram.c | 104 |
1 files changed, 69 insertions, 35 deletions
diff --git a/cpu/mpc512x/fixed_sdram.c b/cpu/mpc512x/fixed_sdram.c index d906903..673d61e 100644 --- a/cpu/mpc512x/fixed_sdram.c +++ b/cpu/mpc512x/fixed_sdram.c @@ -26,17 +26,69 @@ #include <asm/mpc512x.h> /* + * MDDRC Config Runtime Settings in order of the 4 MDDRC cfg registers + */ +u32 default_mddrc_config[4] = { + CONFIG_SYS_MDDRC_TIME_CFG0, /* time_config0 */ + CONFIG_SYS_MDDRC_TIME_CFG1, /* time_config1 */ + CONFIG_SYS_MDDRC_TIME_CFG2, /* time_config2 */ + CONFIG_SYS_MDDRC_SYS_CFG, /* sys_config */ +}; + +u32 default_init_seq[] = { + CONFIG_SYS_DDRCMD_NOP, + CONFIG_SYS_DDRCMD_NOP, + CONFIG_SYS_DDRCMD_NOP, + CONFIG_SYS_DDRCMD_NOP, + CONFIG_SYS_DDRCMD_NOP, + CONFIG_SYS_DDRCMD_NOP, + CONFIG_SYS_DDRCMD_NOP, + CONFIG_SYS_DDRCMD_NOP, + CONFIG_SYS_DDRCMD_NOP, + CONFIG_SYS_DDRCMD_NOP, + CONFIG_SYS_DDRCMD_PCHG_ALL, + CONFIG_SYS_DDRCMD_NOP, + CONFIG_SYS_DDRCMD_RFSH, + CONFIG_SYS_DDRCMD_NOP, + CONFIG_SYS_DDRCMD_RFSH, + CONFIG_SYS_DDRCMD_NOP, + CONFIG_SYS_MICRON_INIT_DEV_OP, + CONFIG_SYS_DDRCMD_NOP, + CONFIG_SYS_DDRCMD_EM2, + CONFIG_SYS_DDRCMD_NOP, + CONFIG_SYS_DDRCMD_PCHG_ALL, + CONFIG_SYS_DDRCMD_EM2, + CONFIG_SYS_DDRCMD_EM3, + CONFIG_SYS_DDRCMD_EN_DLL, + CONFIG_SYS_MICRON_INIT_DEV_OP, + CONFIG_SYS_DDRCMD_PCHG_ALL, + CONFIG_SYS_DDRCMD_RFSH, + CONFIG_SYS_MICRON_INIT_DEV_OP, + CONFIG_SYS_DDRCMD_OCD_DEFAULT, + CONFIG_SYS_DDRCMD_PCHG_ALL, + CONFIG_SYS_DDRCMD_NOP +}; + +/* * fixed sdram init: * The board doesn't use memory modules that have serial presence * detect or similar mechanism for discovery of the DRAM settings */ -long int fixed_sdram(void) +long int fixed_sdram(u32 *mddrc_config, u32 *dram_init_seq, int seq_sz) { volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; u32 msize = CONFIG_SYS_DDR_SIZE * 1024 * 1024; u32 msize_log2 = __ilog2(msize); u32 i; + /* take default settings and init sequence if necessary */ + if (mddrc_config == NULL) + mddrc_config = default_mddrc_config; + if (dram_init_seq == NULL) { + dram_init_seq = default_init_seq; + seq_sz = sizeof(default_init_seq)/sizeof(u32); + } + /* Initialize IO Control */ out_be32(&im->io_ctrl.io_control_mem, IOCTRL_MUX_DDR); @@ -45,8 +97,8 @@ long int fixed_sdram(void) out_be32(&im->sysconf.ddrlaw.ar, msize_log2 - 1); sync_law(&im->sysconf.ddrlaw.ar); - /* Enable DDR */ - out_be32(&im->mddrc.ddr_sys_config, CONFIG_SYS_MDDRC_SYS_CFG_EN); + /* DDR Enable */ + out_be32(&im->mddrc.ddr_sys_config, MDDRC_SYS_CFG_EN); /* Initialize DDR Priority Manager */ out_be32(&im->mddrc.prioman_config1, CONFIG_SYS_MDDRCGRP_PM_CFG1); @@ -73,41 +125,23 @@ long int fixed_sdram(void) out_be32(&im->mddrc.lut_table4_alternate_upper, CONFIG_SYS_MDDRCGRP_LUT4_AU); out_be32(&im->mddrc.lut_table4_alternate_lower, CONFIG_SYS_MDDRCGRP_LUT4_AL); - /* Initialize MDDRC */ - out_be32(&im->mddrc.ddr_sys_config, CONFIG_SYS_MDDRC_SYS_CFG); - out_be32(&im->mddrc.ddr_time_config0, CONFIG_SYS_MDDRC_TIME_CFG0); - out_be32(&im->mddrc.ddr_time_config1, CONFIG_SYS_MDDRC_TIME_CFG1); - out_be32(&im->mddrc.ddr_time_config2, CONFIG_SYS_MDDRC_TIME_CFG2); - - /* Initialize DDR */ - for (i = 0; i < 10; i++) - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_NOP); + /* + * Initialize MDDRC + * put MDDRC in CMD mode and + * set the max time between refreshes to 0 during init process + */ + out_be32(&im->mddrc.ddr_sys_config, mddrc_config[3] | MDDRC_SYS_CFG_CMD_MASK); + out_be32(&im->mddrc.ddr_time_config0, mddrc_config[0] & MDDRC_REFRESH_ZERO_MASK); + out_be32(&im->mddrc.ddr_time_config1, mddrc_config[1]); + out_be32(&im->mddrc.ddr_time_config2, mddrc_config[2]); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_PCHG_ALL); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_NOP); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_RFSH); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_NOP); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_RFSH); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_NOP); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_INIT_DEV_OP); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_NOP); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_EM2); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_NOP); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_PCHG_ALL); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_EM2); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_EM3); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_EN_DLL); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_INIT_DEV_OP); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_PCHG_ALL); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_RFSH); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_INIT_DEV_OP); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_OCD_DEFAULT); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_PCHG_ALL); - out_be32(&im->mddrc.ddr_command, CONFIG_SYS_MICRON_NOP); + /* Initialize DDR with either default or supplied init sequence */ + for (i = 0; i < seq_sz; i++) + out_be32(&im->mddrc.ddr_command, dram_init_seq[i]); /* Start MDDRC */ - out_be32(&im->mddrc.ddr_time_config0, CONFIG_SYS_MDDRC_TIME_CFG0_RUN); - out_be32(&im->mddrc.ddr_sys_config, CONFIG_SYS_MDDRC_SYS_CFG_RUN); + out_be32(&im->mddrc.ddr_time_config0, mddrc_config[0]); + out_be32(&im->mddrc.ddr_sys_config, mddrc_config[3]); return msize; } |