diff options
Diffstat (limited to 'board/tqc/tqm85xx/sdram.c')
| -rw-r--r-- | board/tqc/tqm85xx/sdram.c | 150 |
1 files changed, 148 insertions, 2 deletions
diff --git a/board/tqc/tqm85xx/sdram.c b/board/tqc/tqm85xx/sdram.c index e005d844f..442ff667c 100644 --- a/board/tqc/tqm85xx/sdram.c +++ b/board/tqc/tqm85xx/sdram.c @@ -30,16 +30,27 @@ struct sdram_conf_s { unsigned long size; unsigned long reg; +#ifdef CONFIG_TQM8548 + unsigned long refresh; +#endif /* CONFIG_TQM8548 */ }; typedef struct sdram_conf_s sdram_conf_t; +#ifdef CONFIG_TQM8548 +sdram_conf_t ddr_cs_conf[] = { + {(512 << 20), 0x80044102, 0x0001A000}, /* 512MB, 13x10(4) */ + {(256 << 20), 0x80040102, 0x00014000}, /* 256MB, 13x10(4) */ + {(128 << 20), 0x80040101, 0x0000C000}, /* 128MB, 13x9(4) */ +}; +#else /* !CONFIG_TQM8548 */ sdram_conf_t ddr_cs_conf[] = { {(512 << 20), 0x80000202}, /* 512MB, 14x10(4) */ {(256 << 20), 0x80000102}, /* 256MB, 13x10(4) */ {(128 << 20), 0x80000101}, /* 128MB, 13x9(4) */ {( 64 << 20), 0x80000001}, /* 64MB, 12x9(4) */ }; +#endif /* CONFIG_TQM8548 */ #define N_DDR_CS_CONF (sizeof(ddr_cs_conf) / sizeof(ddr_cs_conf[0])) @@ -56,8 +67,12 @@ long int sdram_setup (int casl) { int i; volatile ccsr_ddr_t *ddr = (void *)(CFG_MPC85xx_DDR_ADDR); +#ifdef CONFIG_TQM8548 + volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR); +#else /* !CONFIG_TQM8548 */ unsigned long cfg_ddr_timing1; unsigned long cfg_ddr_mode; +#endif /* CONFIG_TQM8548 */ /* * Disable memory controller. @@ -65,6 +80,122 @@ long int sdram_setup (int casl) ddr->cs0_config = 0; ddr->sdram_cfg = 0; +#ifdef CONFIG_TQM8548 + ddr->cs0_bnds = (ddr_cs_conf[0].size - 1) >> 24; + ddr->cs0_config = ddr_cs_conf[0].reg; + ddr->timing_cfg_3 = 0x00010000; + + /* TIMING CFG 1, 533MHz + * PRETOACT: 4 Clocks + * ACTTOPRE: 12 Clocks + * ACTTORW: 4 Clocks + * CASLAT: 4 Clocks + * REFREC: 34 Clocks + * WRREC: 4 Clocks + * ACTTOACT: 3 Clocks + * WRTORD: 2 Clocks + */ + ddr->timing_cfg_1 = 0x4C47A432; + + /* TIMING CFG 2, 533MHz + * ADD_LAT: 3 Clocks + * CPO: READLAT + 1 + * WR_LAT: 3 Clocks + * RD_TO_PRE: 2 Clocks + * WR_DATA_DELAY: 1/2 Clock + * CKE_PLS: 1 Clock + * FOUR_ACT: 13 Clocks + */ + ddr->timing_cfg_2 = 0x3318484D; + + /* DDR SDRAM Mode, 533MHz + * MRS: Extended Mode Register + * OUT: Outputs enabled + * RDQS: no + * DQS: enabled + * OCD: default state + * RTT: 75 Ohms + * Posted CAS: 3 Clocks + * ODS: reduced strength + * DLL: enabled + * MR: Mode Register + * PD: fast exit + * WR: 4 Clocks + * DLL: no DLL reset + * TM: normal + * CAS latency: 4 Clocks + * BT: sequential + * Burst length: 4 + */ + ddr->sdram_mode = 0x439E0642; + + /* DDR SDRAM Interval, 533MHz + * REFINT: 1040 Clocks + * BSTOPRE: 256 + */ + ddr->sdram_interval = (1040 << 16) | 0x100; + + /* + * workaround for erratum DD10 of MPC8458 family below rev. 2.0: + * DDR IO receiver must be set to an acceptable bias point by modifying + * a hidden register. + */ + if (SVR_REV (get_svr ()) < 0x20) { + gur->ddrioovcr = 0x90000000; /* enable, VSEL 1.8V */ + } + + /* DDR SDRAM CFG 2 + * FRC_SR: normal mode + * SR_IE: no self-refresh interrupt + * DLL_RST_DIS: don't care, leave at reset value + * DQS_CFG: differential DQS signals + * ODT_CFG: assert ODT to internal IOs only during reads to DRAM + * LVWx_CFG: don't care, leave at reset value + * NUM_PR: 1 refresh will be issued at a time + * DM_CFG: don't care, leave at reset value + * D_INIT: no data initialization + */ + ddr->sdram_cfg_2 = 0x04401000; + + /* DDR SDRAM MODE 2 + * MRS: Extended Mode Register 2 + */ + ddr->sdram_mode_2 = 0x8000C000; + + /* DDR SDRAM CLK CNTL + * CLK_ADJUST: 1/2 Clock 0x02000000 + * CLK_ADJUST: 5/8 Clock 0x02800000 + */ + ddr->sdram_clk_cntl = 0x02800000; + + /* wait for clock stabilization */ + asm ("sync;isync;msync"); + udelay(1000); + + /* DDR SDRAM CLK CNTL + * MEM_EN: enabled + * SREN: don't care, leave at reset value + * ECC_EN: no error report + * RD_EN: no register DIMMs + * SDRAM_TYPE: DDR2 + * DYN_PWR: no power management + * 32_BE: don't care, leave at reset value + * 8_BE: 4 beat burst + * NCAP: don't care, leave at reset value + * 2T_EN: 1T Timing + * BA_INTLV_CTL: no interleaving + * x32_EN: x16 organization + * PCHB8: MA[10] for auto-precharge + * HSE: half strength for single and 2-layer stacks + * (full strength for 3- and 4-layer stacks no yet considered) + * MEM_HALT: no halt + * BI: automatic initialization + */ + ddr->sdram_cfg = 0x83000008; + asm ("sync; isync; msync"); + udelay(1000); + +#else /* !CONFIG_TQM8548 */ switch (casl) { case 20: cfg_ddr_timing1 = 0x47405331 | (3 << 16); @@ -97,6 +228,7 @@ long int sdram_setup (int casl) ddr->sdram_cfg = 0xc2000000; /* unbuffered,no DYN_PWR */ asm ("sync; isync; msync"); udelay (1000); +#endif /* CONFIG_TQM8548 */ for (i = 0; i < N_DDR_CS_CONF; i++) { ddr->cs0_config = ddr_cs_conf[i].reg; @@ -108,11 +240,25 @@ long int sdram_setup (int casl) */ ddr->cs0_bnds = (ddr_cs_conf[i].size - 1) >> 24; - return ddr_cs_conf[i].size; + break; } } - return 0; /* nothing found ! */ +#ifdef CONFIG_TQM8548 + if (i < N_DDR_CS_CONF) { + /* Adjust refresh rate for DDR2 */ + + ddr->timing_cfg_3 = ddr_cs_conf[i].refresh & 0x00070000; + + ddr->timing_cfg_1 = (ddr->timing_cfg_1 & 0xFFFF0FFF) | + (ddr_cs_conf[i].refresh & 0x0000F000); + + return ddr_cs_conf[i].size; + } +#endif /* CONFIG_TQM8548 */ + + /* return size if detected, else return 0 */ + return (i < N_DDR_CS_CONF) ? ddr_cs_conf[i].size : 0; } void board_add_ram_info (int use_default) |