From 28a966715be78fc35147086e68fc80aeb21235b1 Mon Sep 17 00:00:00 2001 From: York Sun Date: Mon, 18 Oct 2010 13:46:49 -0700 Subject: Adding fixed sdram setting for cornet_ds board 800, 900, 1000, 1200MT/s data rate parameters are added for fixed sdram setting. SPD based parameters and fixed parameters can be toggled by hwconfig. To use fixed parameters, hwconfig=fsl_ddr:sdram=fixed To use SPD parameters, hwconfig=fsl_ddr:ctlr_intlv=cacheline,bank_intlv=cs0_cs1 Signed-off-by: York Sun Signed-off-by: Kumar Gala --- board/freescale/corenet_ds/ddr.c | 131 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 130 insertions(+), 1 deletion(-) (limited to 'board/freescale/corenet_ds/ddr.c') diff --git a/board/freescale/corenet_ds/ddr.c b/board/freescale/corenet_ds/ddr.c index 18adf2f..2ee0188 100644 --- a/board/freescale/corenet_ds/ddr.c +++ b/board/freescale/corenet_ds/ddr.c @@ -8,9 +8,103 @@ #include #include - +#include +#include #include #include +#include + +DECLARE_GLOBAL_DATA_PTR; + +extern void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs, + unsigned int ctrl_num); + + +/* + * Fixed sdram init -- doesn't use serial presence detect. + */ +extern fixed_ddr_parm_t fixed_ddr_parm_0[]; +#if (CONFIG_NUM_DDR_CONTROLLERS == 2) +extern fixed_ddr_parm_t fixed_ddr_parm_1[]; +#endif + +phys_size_t fixed_sdram(void) +{ + int i; + sys_info_t sysinfo; + char buf[32]; + fsl_ddr_cfg_regs_t ddr_cfg_regs; + phys_size_t ddr_size; + unsigned int lawbar1_target_id; + + get_sys_info(&sysinfo); + printf("Configuring DDR for %s MT/s data rate\n", + strmhz(buf, sysinfo.freqDDRBus)); + + for (i = 0; fixed_ddr_parm_0[i].max_freq > 0; i++) { + if ((sysinfo.freqDDRBus > fixed_ddr_parm_0[i].min_freq) && + (sysinfo.freqDDRBus <= fixed_ddr_parm_0[i].max_freq)) { + memcpy(&ddr_cfg_regs, + fixed_ddr_parm_0[i].ddr_settings, + sizeof(ddr_cfg_regs)); + break; + } + } + + if (fixed_ddr_parm_0[i].max_freq == 0) + panic("Unsupported DDR data rate %s MT/s data rate\n", + strmhz(buf, sysinfo.freqDDRBus)); + + ddr_size = (phys_size_t) CONFIG_SYS_SDRAM_SIZE * 1024 * 1024; + fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0); + +#if (CONFIG_NUM_DDR_CONTROLLERS == 2) + memcpy(&ddr_cfg_regs, + fixed_ddr_parm_1[i].ddr_settings, + sizeof(ddr_cfg_regs)); + fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 1); +#endif + + /* + * setup laws for DDR. If not interleaving, presuming half memory on + * DDR1 and the other half on DDR2 + */ + if (fixed_ddr_parm_0[i].ddr_settings->cs[0].config & 0x20000000) { + if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE, + ddr_size, + LAW_TRGT_IF_DDR_INTRLV) < 0) { + printf("ERROR setting Local Access Windows for DDR\n"); + return 0; + } + } else { +#if (CONFIG_NUM_DDR_CONTROLLERS == 2) + /* We require both controllers have identical DIMMs */ + lawbar1_target_id = LAW_TRGT_IF_DDR_1; + if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE, + ddr_size / 2, + lawbar1_target_id) < 0) { + printf("ERROR setting Local Access Windows for DDR\n"); + return 0; + } + lawbar1_target_id = LAW_TRGT_IF_DDR_2; + if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE + ddr_size / 2, + ddr_size / 2, + lawbar1_target_id) < 0) { + printf("ERROR setting Local Access Windows for DDR\n"); + return 0; + } +#else + lawbar1_target_id = LAW_TRGT_IF_DDR_1; + if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE, + ddr_size, + lawbar1_target_id) < 0) { + printf("ERROR setting Local Access Windows for DDR\n"); + return 0; + } +#endif + } + return ddr_size; +} static void get_spd(ddr3_spd_eeprom_t *spd, unsigned char i2c_address) { @@ -190,3 +284,38 @@ void fsl_ddr_board_options(memctl_options_t *popts, /* Enable ZQ calibration */ popts->zq_en = 1; } + +phys_size_t initdram(int board_type) +{ + phys_size_t dram_size; + int use_spd = 0; + + puts("Initializing...."); + +#ifdef CONFIG_DDR_SPD + /* if hwconfig is not enabled, or "sdram" is not defined, use spd */ + if (hwconfig_sub("fsl_ddr", "sdram")) { + if (hwconfig_subarg_cmp("fsl_ddr", "sdram", "spd")) + use_spd = 1; + else if (hwconfig_subarg_cmp("fsl_ddr", "sdram", "fixed")) + use_spd = 0; + else + use_spd = 1; + } else + use_spd = 1; +#endif + + if (use_spd) { + puts("using SPD\n"); + dram_size = fsl_ddr_sdram(); + } else { + puts("using fixed parameters\n"); + dram_size = fixed_sdram(); + } + + dram_size = setup_ddr_tlbs(dram_size / 0x100000); + dram_size *= 0x100000; + + puts(" DDR: "); + return dram_size; +} -- cgit v1.1