+
/*
* (C) Copyright 2005
* Stefan Roese, DENX Software Engineering, sr@denx.de.
typedef struct sdram_conf_s sdram_conf_t;
#ifdef CONFIG_TQM8548
+#ifdef CONFIG_TQM8548_AG
+sdram_conf_t ddr_cs_conf[] = {
+ {(1024 << 20), 0x80044202, 0x0002D000}, /* 1024MB, 14x10(4) */
+ { (512 << 20), 0x80044102, 0x0001A000}, /* 512MB, 13x10(4) */
+ { (256 << 20), 0x80040102, 0x00014000}, /* 256MB, 13x10(4) */
+ { (128 << 20), 0x80040101, 0x0000C000}, /* 128MB, 13x9(4) */
+};
+#else /* !CONFIG_TQM8548_AG */
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) */
};
+#endif /* CONFIG_TQM8548_AG */
#else /* !CONFIG_TQM8548 */
sdram_conf_t ddr_cs_conf[] = {
{(512 << 20), 0x80000202}, /* 512MB, 14x10(4) */
volatile ccsr_ddr_t *ddr = (void *)(CONFIG_SYS_MPC85xx_DDR_ADDR);
#ifdef CONFIG_TQM8548
volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+#if defined(CONFIG_TQM8548_AG) || defined(CONFIG_TQM8548_BE)
+ volatile ccsr_local_ecm_t *ecm = (void *)(CONFIG_SYS_MPC85xx_ECM_ADDR);
+#endif
#else /* !CONFIG_TQM8548 */
unsigned long cfg_ddr_timing1;
unsigned long cfg_ddr_mode;
ddr->sdram_cfg = 0;
#ifdef CONFIG_TQM8548
+ /* Timing and refresh settings for DDR2-533 and below */
+
ddr->cs0_bnds = (ddr_cs_conf[0].size - 1) >> 24;
ddr->cs0_config = ddr_cs_conf[0].reg;
- ddr->timing_cfg_3 = 0x00010000;
+ ddr->timing_cfg_3 = 0x00020000;
/* TIMING CFG 1, 533MHz
* PRETOACT: 4 Clocks
* ACTTOPRE: 12 Clocks
* ACTTORW: 4 Clocks
* CASLAT: 4 Clocks
- * REFREC: 34 Clocks
+ * REFREC: EXT_REFREC:REFREC 53 Clocks
* WRREC: 4 Clocks
* ACTTOACT: 3 Clocks
* WRTORD: 2 Clocks
*/
- ddr->timing_cfg_1 = 0x4C47A432;
+ ddr->timing_cfg_1 = 0x4C47D432;
/* TIMING CFG 2, 533MHz
* ADD_LAT: 3 Clocks
* WR_LAT: 3 Clocks
* RD_TO_PRE: 2 Clocks
* WR_DATA_DELAY: 1/2 Clock
- * CKE_PLS: 1 Clock
- * FOUR_ACT: 13 Clocks
+ * CKE_PLS: 3 Clock
+ * FOUR_ACT: 14 Clocks
*/
- ddr->timing_cfg_2 = 0x3318484D;
+ ddr->timing_cfg_2 = 0x331848CE;
/* DDR SDRAM Mode, 533MHz
* MRS: Extended Mode Register
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.
+ * Workaround for erratum DDR19 according to MPC8548 Device Errata
+ * document, Rev. 1: DDR IO receiver must be set to an acceptable
+ * bias point by modifying a hidden register.
*/
- if (SVR_REV (get_svr ()) < 0x20) {
+ if (SVR_REV (get_svr ()) < 0x21)
gur->ddrioovcr = 0x90000000; /* enable, VSEL 1.8V */
- }
/* DDR SDRAM CFG 2
* FRC_SR: normal mode
/* wait for clock stabilization */
asm ("sync;isync;msync");
- udelay(1000);
+ udelay (1000);
+
+#if defined(CONFIG_TQM8548_AG) || defined(CONFIG_TQM8548_BE)
+ /*
+ * Workaround for erratum DDR20 according to MPC8548 Device Errata
+ * document, Rev. 1: "CKE signal may not function correctly after
+ * assertion of HRESET"
+ */
+
+ /* 1. Configure DDR register as is done in normal DDR configuration.
+ * Do not set DDR_SDRAM_CFG[MEM_EN].
+ *
+ * 2. Set reserved bit EEBACR[3] at offset 0x1000
+ */
+ ecm->eebacr |= 0x10000000;
+
+ /*
+ * 3. Before DDR_SDRAM_CFG[MEM_EN] is set, write DDR_SDRAM_CFG_2[D_INIT]
+ *
+ * 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: enable data initialization
+ */
+ ddr->sdram_cfg_2 |= 0x00000010;
+
+ /*
+ * 4. Before DDR_SDRAM_CFG[MEM_EN] set, write D3[21] to disable data
+ * training
+ */
+ ddr->debug_3 |= 0x00000400;
+
+ /*
+ * 5. Wait 200 micro-seconds
+ */
+ udelay (200);
+
+ /*
+ * 6. Set DDR_SDRAM_CFG[MEM_EN]
+ *
+ * BTW, initialize DDR_SDRAM_CFG:
+ * MEM_EN: enabled
+ * SREN: don't care, leave at reset value
+ * ECC_EN: no error report
+ * RD_EN: no registered 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 not
+ * yet considered)
+ * MEM_HALT: no halt
+ * BI: automatic initialization
+ */
+ ddr->sdram_cfg = 0x83000008;
+
+ /*
+ * 7. Poll DDR_SDRAM_CFG_2[D_INIT] until it is cleared by hardware
+ */
+ asm ("sync;isync;msync");
+ while (ddr->sdram_cfg_2 & 0x00000010)
+ asm ("eieio");
+
+ /*
+ * 8. Clear D3[21] to re-enable data training
+ */
+ ddr->debug_3 &= ~0x00000400;
+
+ /*
+ * 9. Set D2(21) to force data training to run
+ */
+ ddr->debug_2 |= 0x00000400;
+
+ /*
+ * 10. Poll on D2[21] until it is cleared by hardware
+ */
+ asm ("sync;isync;msync");
+ while (ddr->debug_2 & 0x00000400)
+ asm ("eieio");
+
+ /*
+ * 11. Clear reserved bit EEBACR[3] at offset 0x1000
+ */
+ ecm->eebacr &= ~0x10000000;
+
+#else /* !(CONFIG_TQM8548_AG || CONFIG_TQM8548_BE) */
/* DDR SDRAM CLK CNTL
* MEM_EN: enabled
* BI: automatic initialization
*/
ddr->sdram_cfg = 0x83000008;
- asm ("sync; isync; msync");
- udelay(1000);
+#endif /* CONFIG_TQM8548_AG || CONFIG_TQM8548_BE */
+
+ asm ("sync; isync; msync");
+ udelay (1000);
#else /* !CONFIG_TQM8548 */
switch (casl) {
case 20:
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