X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=cpu%2Fmpc85xx%2Fspd_sdram.c;h=435458a18930b482394c79b458a397ef974c3dcd;hb=be32bf20bc5bbf3e8cf07085743bbc8f05630812;hp=af99282dd94bbfae4083ec0d5b83efed562adc37;hpb=4b1d95d96a39a71eddd088bb5e0e9e699035c9bf;p=oweals%2Fu-boot.git diff --git a/cpu/mpc85xx/spd_sdram.c b/cpu/mpc85xx/spd_sdram.c index af99282dd9..435458a189 100644 --- a/cpu/mpc85xx/spd_sdram.c +++ b/cpu/mpc85xx/spd_sdram.c @@ -1,5 +1,5 @@ /* - * Copyright 2004 Freescale Semiconductor. + * Copyright 2004, 2007 Freescale Semiconductor. * (C) Copyright 2003 Motorola Inc. * Xianghua Xiao (X.Xiao@motorola.com) * @@ -27,6 +27,7 @@ #include #include #include +#include #if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER) @@ -53,8 +54,8 @@ picos_to_clk(int picos) { int clks; - clks = picos / (2000000000 / (get_bus_freq(0) / 1000)); - if (picos % (2000000000 / (get_bus_freq(0) / 1000)) != 0) { + clks = picos / (2000000000 / (get_ddr_freq(0) / 1000)); + if (picos % (2000000000 / (get_ddr_freq(0) / 1000)) != 0) { clks++; } @@ -131,8 +132,8 @@ convert_bcd_tenths_to_cycle_time_ps(unsigned int spd_val) 800, 900, 250, - 330, /* FIXME: Is 333 better/valid? */ - 660, /* FIXME: Is 667 better/valid? */ + 330, + 660, 750, 0, /* undefined */ 0 /* undefined */ @@ -146,24 +147,48 @@ convert_bcd_tenths_to_cycle_time_ps(unsigned int spd_val) } +/* + * Determine Refresh Rate. Ignore self refresh bit on DDR I. + * Table from SPD Spec, Byte 12, converted to picoseconds and + * filled in with "default" normal values. + */ +unsigned int determine_refresh_rate(unsigned int spd_refresh) +{ + unsigned int refresh_time_ns[8] = { + 15625000, /* 0 Normal 1.00x */ + 3900000, /* 1 Reduced .25x */ + 7800000, /* 2 Extended .50x */ + 31300000, /* 3 Extended 2.00x */ + 62500000, /* 4 Extended 4.00x */ + 125000000, /* 5 Extended 8.00x */ + 15625000, /* 6 Normal 1.00x filler */ + 15625000, /* 7 Normal 1.00x filler */ + }; + + return picos_to_clk(refresh_time_ns[spd_refresh & 0x7]); +} + + long int spd_sdram(void) { - volatile immap_t *immap = (immap_t *)CFG_IMMR; - volatile ccsr_ddr_t *ddr = &immap->im_ddr; - volatile ccsr_gur_t *gur = &immap->im_gur; + volatile ccsr_ddr_t *ddr = (void *)(CFG_MPC85xx_DDR_ADDR); spd_eeprom_t spd; unsigned int n_ranks; unsigned int rank_density; - unsigned int odt_rd_cfg, odt_wr_cfg; + unsigned int odt_rd_cfg, odt_wr_cfg, ba_bits; unsigned int odt_cfg, mode_odt_enable; + unsigned int refresh_clk; +#ifdef MPC85xx_DDR_SDRAM_CLK_CNTL + unsigned char clk_adjust; +#endif unsigned int dqs_cfg; unsigned char twr_clk, twtr_clk, twr_auto_clk; unsigned int tCKmin_ps, tCKmax_ps; unsigned int max_data_rate, effective_data_rate; unsigned int busfreq; unsigned sdram_cfg; - unsigned int memsize; + unsigned int memsize = 0; unsigned char caslat, caslat_ctrl; unsigned int trfc, trfc_clk, trfc_low, trfc_high; unsigned int trcd_clk; @@ -178,6 +203,46 @@ spd_sdram(void) unsigned int mode_caslat; unsigned char sdram_type; unsigned char d_init; + unsigned int bnds; + + /* + * Skip configuration if already configured. + * memsize is determined from last configured chip select. + */ + if (ddr->cs0_config & 0x80000000) { + debug(" cs0 already configured, bnds=%x\n",ddr->cs0_bnds); + bnds = 0xfff & ddr->cs0_bnds; + if (bnds < 0xff) { /* do not add if at top of 4G */ + memsize = (bnds + 1) << 4; + } + } + if (ddr->cs1_config & 0x80000000) { + debug(" cs1 already configured, bnds=%x\n",ddr->cs1_bnds); + bnds = 0xfff & ddr->cs1_bnds; + if (bnds < 0xff) { /* do not add if at top of 4G */ + memsize = (bnds + 1) << 4; /* assume ordered bnds */ + } + } + if (ddr->cs2_config & 0x80000000) { + debug(" cs2 already configured, bnds=%x\n",ddr->cs2_bnds); + bnds = 0xfff & ddr->cs2_bnds; + if (bnds < 0xff) { /* do not add if at top of 4G */ + memsize = (bnds + 1) << 4; + } + } + if (ddr->cs3_config & 0x80000000) { + debug(" cs3 already configured, bnds=%x\n",ddr->cs3_bnds); + bnds = 0xfff & ddr->cs3_bnds; + if (bnds < 0xff) { /* do not add if at top of 4G */ + memsize = (bnds + 1) << 4; + } + } + + if (memsize) { + printf(" Reusing current %dMB configuration\n",memsize); + memsize = setup_laws_and_tlbs(memsize); + return memsize << 20; + } /* * Read SPD information. @@ -236,15 +301,19 @@ spd_sdram(void) return 0; } +#ifdef CONFIG_MPC8548 /* - * Adjust DDR II IO voltage biasing. It just makes it work. + * Adjust DDR II IO voltage biasing. + * Only 8548 rev 1 needs the fix */ - if (spd.mem_type == SPD_MEMTYPE_DDR2) { - gur->ddrioovcr = (0 - | 0x80000000 /* Enable */ - | 0x10000000 /* VSEL to 1.8V */ - ); + if ((SVR_SOC_VER(get_svr()) == SVR_8548_E) && + (SVR_MJREV(get_svr()) == 1) && + (spd.mem_type == SPD_MEMTYPE_DDR2)) { + volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR); + gur->ddrioovcr = (0x80000000 /* Enable */ + | 0x10000000);/* VSEL to 1.8V */ } +#endif /* * Determine the size of each Rank in bytes. @@ -272,9 +341,14 @@ spd_sdram(void) #endif } + ba_bits = 0; + if (spd.nbanks == 0x8) + ba_bits = 1; + ddr->cs0_config = ( 1 << 31 | (odt_rd_cfg << 20) | (odt_wr_cfg << 16) + | (ba_bits << 14) | (spd.nrow_addr - 12) << 8 | (spd.ncol_addr - 8) ); debug("\n"); @@ -348,7 +422,7 @@ spd_sdram(void) * Adjust the CAS Latency to allow for bus speeds that * are slower than the DDR module. */ - busfreq = get_bus_freq(0) / 1000000; /* MHz */ + busfreq = get_ddr_freq(0) / 1000000; /* MHz */ effective_data_rate = max_data_rate; if (busfreq < 90) { @@ -618,13 +692,10 @@ spd_sdram(void) */ cpo = 0; if (spd.mem_type == SPD_MEMTYPE_DDR2) { - if (effective_data_rate == 266 || effective_data_rate == 333) { + if (effective_data_rate <= 333) { cpo = 0x7; /* READ_LAT + 5/4 */ - } else if (effective_data_rate == 400) { - cpo = 0x9; /* READ_LAT + 7/4 */ } else { - /* Pure speculation */ - cpo = 0xb; + cpo = 0x9; /* READ_LAT + 7/4 */ } } @@ -740,51 +811,37 @@ spd_sdram(void) ddr->sdram_mode_2 = 0; debug("DDR: sdram_mode_2 = 0x%08x\n", ddr->sdram_mode_2); - /* - * Determine Refresh Rate. Ignore self refresh bit on DDR I. - * Table from SPD Spec, Byte 12, converted to picoseconds and - * filled in with "default" normal values. + * Determine Refresh Rate. */ - { - unsigned int refresh_clk; - unsigned int refresh_time_ns[8] = { - 15625000, /* 0 Normal 1.00x */ - 3900000, /* 1 Reduced .25x */ - 7800000, /* 2 Extended .50x */ - 31300000, /* 3 Extended 2.00x */ - 62500000, /* 4 Extended 4.00x */ - 125000000, /* 5 Extended 8.00x */ - 15625000, /* 6 Normal 1.00x filler */ - 15625000, /* 7 Normal 1.00x filler */ - }; + refresh_clk = determine_refresh_rate(spd.refresh & 0x7); - refresh_clk = picos_to_clk(refresh_time_ns[spd.refresh & 0x7]); - - /* - * Set BSTOPRE to 0x100 for page mode - * If auto-charge is used, set BSTOPRE = 0 - */ - ddr->sdram_interval = - (0 - | (refresh_clk & 0x3fff) << 16 - | 0x100 - ); - debug("DDR: sdram_interval = 0x%08x\n", ddr->sdram_interval); - } + /* + * Set BSTOPRE to 0x100 for page mode + * If auto-charge is used, set BSTOPRE = 0 + */ + ddr->sdram_interval = + (0 + | (refresh_clk & 0x3fff) << 16 + | 0x100 + ); + debug("DDR: sdram_interval = 0x%08x\n", ddr->sdram_interval); /* * Is this an ECC DDR chip? * But don't mess with it if the DDR controller will init mem. */ -#if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER) +#ifdef CONFIG_DDR_ECC if (spd.config == 0x02) { +#ifndef CONFIG_ECC_INIT_VIA_DDRCONTROLLER ddr->err_disable = 0x0000000d; +#endif ddr->err_sbe = 0x00ff0000; } + debug("DDR: err_disable = 0x%08x\n", ddr->err_disable); debug("DDR: err_sbe = 0x%08x\n", ddr->err_sbe); -#endif +#endif /* CONFIG_DDR_ECC */ asm("sync;isync;msync"); udelay(500); @@ -835,28 +892,28 @@ spd_sdram(void) #ifdef MPC85xx_DDR_SDRAM_CLK_CNTL - { - unsigned char clk_adjust; - - /* - * Setup the clock control. - * SDRAM_CLK_CNTL[0] = Source synchronous enable == 1 - * SDRAM_CLK_CNTL[5-7] = Clock Adjust - * 0110 3/4 cycle late - * 0111 7/8 cycle late - */ - if (spd.mem_type == SPD_MEMTYPE_DDR) { - clk_adjust = 0x6; - } else { - clk_adjust = 0x7; - } + /* + * Setup the clock control. + * SDRAM_CLK_CNTL[0] = Source synchronous enable == 1 + * SDRAM_CLK_CNTL[5-7] = Clock Adjust + * 0110 3/4 cycle late + * 0111 7/8 cycle late + */ + if (spd.mem_type == SPD_MEMTYPE_DDR) + clk_adjust = 0x6; + else +#ifdef CONFIG_MPC8568 + /* Empirally setting clk_adjust */ + clk_adjust = 0x6; +#else + clk_adjust = 0x7; +#endif - ddr->sdram_clk_cntl = (0 + ddr->sdram_clk_cntl = (0 | 0x80000000 | (clk_adjust << 23) ); - debug("DDR: sdram_clk_cntl = 0x%08x\n", ddr->sdram_clk_cntl); - } + debug("DDR: sdram_clk_cntl = 0x%08x\n", ddr->sdram_clk_cntl); #endif /* @@ -966,8 +1023,6 @@ spd_sdram(void) static unsigned int setup_laws_and_tlbs(unsigned int memsize) { - volatile immap_t *immap = (immap_t *)CFG_IMMR; - volatile ccsr_local_ecm_t *ecm = &immap->im_local_ecm; unsigned int tlb_size; unsigned int law_size; unsigned int ram_tlb_index; @@ -987,17 +1042,24 @@ setup_laws_and_tlbs(unsigned int memsize) break; case 256: case 512: + tlb_size = BOOKE_PAGESZ_256M; + break; case 1024: case 2048: - tlb_size = BOOKE_PAGESZ_256M; + if (PVR_VER(get_pvr()) > PVR_VER(PVR_85xx)) + tlb_size = BOOKE_PAGESZ_1G; + else + tlb_size = BOOKE_PAGESZ_256M; break; default: puts("DDR: only 16M,32M,64M,128M,256M,512M,1G and 2G are supported.\n"); /* * The memory was not able to be mapped. + * Default to a small size. */ - return 0; + tlb_size = BOOKE_PAGESZ_64M; + memsize=64; break; } @@ -1009,22 +1071,9 @@ setup_laws_and_tlbs(unsigned int memsize) ram_tlb_address = (unsigned int)CFG_DDR_SDRAM_BASE; while (ram_tlb_address < (memsize * 1024 * 1024) && ram_tlb_index < 16) { - mtspr(MAS0, TLB1_MAS0(1, ram_tlb_index, 0)); - mtspr(MAS1, TLB1_MAS1(1, 1, 0, 0, tlb_size)); - mtspr(MAS2, TLB1_MAS2(E500_TLB_EPN(ram_tlb_address), - 0, 0, 0, 0, 0, 0, 0, 0)); - mtspr(MAS3, TLB1_MAS3(E500_TLB_RPN(ram_tlb_address), - 0, 0, 0, 0, 0, 1, 0, 1, 0, 1)); - asm volatile("isync;msync;tlbwe;isync"); - - debug("DDR: MAS0=0x%08x\n", TLB1_MAS0(1, ram_tlb_index, 0)); - debug("DDR: MAS1=0x%08x\n", TLB1_MAS1(1, 1, 0, 0, tlb_size)); - debug("DDR: MAS2=0x%08x\n", - TLB1_MAS2(E500_TLB_EPN(ram_tlb_address), - 0, 0, 0, 0, 0, 0, 0, 0)); - debug("DDR: MAS3=0x%08x\n", - TLB1_MAS3(E500_TLB_RPN(ram_tlb_address), - 0, 0, 0, 0, 0, 1, 0, 1, 0, 1)); + set_tlb(1, ram_tlb_address, ram_tlb_address, + MAS3_SX|MAS3_SW|MAS3_SR, 0, + 0, ram_tlb_index, tlb_size, 1); ram_tlb_address += (0x1000 << ((tlb_size - 1) * 2)); ram_tlb_index++; @@ -1039,12 +1088,10 @@ setup_laws_and_tlbs(unsigned int memsize) /* * Set up LAWBAR for all of DDR. */ - ecm->lawbar1 = ((CFG_DDR_SDRAM_BASE >> 12) & 0xfffff); - ecm->lawar1 = (LAWAR_EN - | LAWAR_TRGT_IF_DDR - | (LAWAR_SIZE & law_size)); - debug("DDR: LAWBAR1=0x%08x\n", ecm->lawbar1); - debug("DDR: LARAR1=0x%08x\n", ecm->lawar1); + +#ifdef CONFIG_FSL_LAW + set_law(1, CFG_DDR_SDRAM_BASE, law_size, LAW_TRGT_IF_DDR); +#endif /* * Confirm that the requested amount of memory was mapped. @@ -1066,8 +1113,7 @@ ddr_enable_ecc(unsigned int dram_size) { uint *p = 0; uint i = 0; - volatile immap_t *immap = (immap_t *)CFG_IMMR; - volatile ccsr_ddr_t *ddr= &immap->im_ddr; + volatile ccsr_ddr_t *ddr= (void *)(CFG_MPC85xx_DDR_ADDR); dma_init(); @@ -1081,26 +1127,16 @@ ddr_enable_ecc(unsigned int dram_size) } } - /* 8K */ - dma_xfer((uint *)0x2000, 0x2000, (uint *)0); - /* 16K */ - dma_xfer((uint *)0x4000, 0x4000, (uint *)0); - /* 32K */ - dma_xfer((uint *)0x8000, 0x8000, (uint *)0); - /* 64K */ - dma_xfer((uint *)0x10000, 0x10000, (uint *)0); - /* 128k */ - dma_xfer((uint *)0x20000, 0x20000, (uint *)0); - /* 256k */ - dma_xfer((uint *)0x40000, 0x40000, (uint *)0); - /* 512k */ - dma_xfer((uint *)0x80000, 0x80000, (uint *)0); - /* 1M */ - dma_xfer((uint *)0x100000, 0x100000, (uint *)0); - /* 2M */ - dma_xfer((uint *)0x200000, 0x200000, (uint *)0); - /* 4M */ - dma_xfer((uint *)0x400000, 0x400000, (uint *)0); + dma_xfer((uint *)0x002000, 0x002000, (uint *)0); /* 8K */ + dma_xfer((uint *)0x004000, 0x004000, (uint *)0); /* 16K */ + dma_xfer((uint *)0x008000, 0x008000, (uint *)0); /* 32K */ + dma_xfer((uint *)0x010000, 0x010000, (uint *)0); /* 64K */ + dma_xfer((uint *)0x020000, 0x020000, (uint *)0); /* 128k */ + dma_xfer((uint *)0x040000, 0x040000, (uint *)0); /* 256k */ + dma_xfer((uint *)0x080000, 0x080000, (uint *)0); /* 512k */ + dma_xfer((uint *)0x100000, 0x100000, (uint *)0); /* 1M */ + dma_xfer((uint *)0x200000, 0x200000, (uint *)0); /* 2M */ + dma_xfer((uint *)0x400000, 0x400000, (uint *)0); /* 4M */ for (i = 1; i < dram_size / 0x800000; i++) { dma_xfer((uint *)(0x800000*i), 0x800000, (uint *)0);