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diff --git a/arch/ppc/cpu/mpc83xx/spd_sdram.c b/arch/ppc/cpu/mpc83xx/spd_sdram.c
new file mode 100644
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+++ b/arch/ppc/cpu/mpc83xx/spd_sdram.c
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+/*
+ * (C) Copyright 2006-2007 Freescale Semiconductor, Inc.
+ *
+ * (C) Copyright 2006
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Copyright (C) 2004-2006 Freescale Semiconductor, Inc.
+ * (C) Copyright 2003 Motorola Inc.
+ * Xianghua Xiao (X.Xiao@motorola.com)
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <i2c.h>
+#include <spd.h>
+#include <asm/mmu.h>
+#include <spd_sdram.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void board_add_ram_info(int use_default)
+{
+ volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
+ volatile ddr83xx_t *ddr = &immap->ddr;
+ char buf[32];
+
+ printf(" (DDR%d", ((ddr->sdram_cfg & SDRAM_CFG_SDRAM_TYPE_MASK)
+ >> SDRAM_CFG_SDRAM_TYPE_SHIFT) - 1);
+
+ if (ddr->sdram_cfg & SDRAM_CFG_32_BE)
+ puts(", 32-bit");
+ else
+ puts(", 64-bit");
+
+ if (ddr->sdram_cfg & SDRAM_CFG_ECC_EN)
+ puts(", ECC on");
+ else
+ puts(", ECC off");
+
+ printf(", %s MHz)", strmhz(buf, gd->mem_clk));
+
+#if defined(CONFIG_SYS_LB_SDRAM) && defined(CONFIG_SYS_LBC_SDRAM_SIZE)
+ puts("\nSDRAM: ");
+ print_size (CONFIG_SYS_LBC_SDRAM_SIZE * 1024 * 1024, " (local bus)");
+#endif
+}
+
+#ifdef CONFIG_SPD_EEPROM
+#ifndef CONFIG_SYS_READ_SPD
+#define CONFIG_SYS_READ_SPD i2c_read
+#endif
+
+/*
+ * Convert picoseconds into clock cycles (rounding up if needed).
+ */
+int
+picos_to_clk(int picos)
+{
+ unsigned int mem_bus_clk;
+ int clks;
+
+ mem_bus_clk = gd->mem_clk >> 1;
+ clks = picos / (1000000000 / (mem_bus_clk / 1000));
+ if (picos % (1000000000 / (mem_bus_clk / 1000)) != 0)
+ clks++;
+
+ return clks;
+}
+
+unsigned int banksize(unsigned char row_dens)
+{
+ return ((row_dens >> 2) | ((row_dens & 3) << 6)) << 24;
+}
+
+int read_spd(uint addr)
+{
+ return ((int) addr);
+}
+
+#undef SPD_DEBUG
+#ifdef SPD_DEBUG
+static void spd_debug(spd_eeprom_t *spd)
+{
+ printf ("\nDIMM type: %-18.18s\n", spd->mpart);
+ printf ("SPD size: %d\n", spd->info_size);
+ printf ("EEPROM size: %d\n", 1 << spd->chip_size);
+ printf ("Memory type: %d\n", spd->mem_type);
+ printf ("Row addr: %d\n", spd->nrow_addr);
+ printf ("Column addr: %d\n", spd->ncol_addr);
+ printf ("# of rows: %d\n", spd->nrows);
+ printf ("Row density: %d\n", spd->row_dens);
+ printf ("# of banks: %d\n", spd->nbanks);
+ printf ("Data width: %d\n",
+ 256 * spd->dataw_msb + spd->dataw_lsb);
+ printf ("Chip width: %d\n", spd->primw);
+ printf ("Refresh rate: %02X\n", spd->refresh);
+ printf ("CAS latencies: %02X\n", spd->cas_lat);
+ printf ("Write latencies: %02X\n", spd->write_lat);
+ printf ("tRP: %d\n", spd->trp);
+ printf ("tRCD: %d\n", spd->trcd);
+ printf ("\n");
+}
+#endif /* SPD_DEBUG */
+
+long int spd_sdram()
+{
+ volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
+ volatile ddr83xx_t *ddr = &immap->ddr;
+ volatile law83xx_t *ecm = &immap->sysconf.ddrlaw[0];
+ spd_eeprom_t spd;
+ unsigned int n_ranks;
+ unsigned int odt_rd_cfg, odt_wr_cfg;
+ unsigned char twr_clk, twtr_clk;
+ unsigned int sdram_type;
+ unsigned int memsize;
+ unsigned int law_size;
+ unsigned char caslat, caslat_ctrl;
+ unsigned int trfc, trfc_clk, trfc_low, trfc_high;
+ unsigned int trcd_clk, trtp_clk;
+ unsigned char cke_min_clk;
+ unsigned char add_lat, wr_lat;
+ unsigned char wr_data_delay;
+ unsigned char four_act;
+ unsigned char cpo;
+ unsigned char burstlen;
+ unsigned char odt_cfg, mode_odt_enable;
+ unsigned int max_bus_clk;
+ unsigned int max_data_rate, effective_data_rate;
+ unsigned int ddrc_clk;
+ unsigned int refresh_clk;
+ unsigned int sdram_cfg;
+ unsigned int ddrc_ecc_enable;
+ unsigned int pvr = get_pvr();
+
+ /*
+ * First disable the memory controller (could be enabled
+ * by the debugger)
+ */
+ clrsetbits_be32(&ddr->sdram_cfg, SDRAM_CFG_MEM_EN, 0);
+ sync();
+ isync();
+
+ /* Read SPD parameters with I2C */
+ CONFIG_SYS_READ_SPD(SPD_EEPROM_ADDRESS, 0, 1, (uchar *) & spd, sizeof (spd));
+#ifdef SPD_DEBUG
+ spd_debug(&spd);
+#endif
+ /* Check the memory type */
+ if (spd.mem_type != SPD_MEMTYPE_DDR && spd.mem_type != SPD_MEMTYPE_DDR2) {
+ debug("DDR: Module mem type is %02X\n", spd.mem_type);
+ return 0;
+ }
+
+ /* Check the number of physical bank */
+ if (spd.mem_type == SPD_MEMTYPE_DDR) {
+ n_ranks = spd.nrows;
+ } else {
+ n_ranks = (spd.nrows & 0x7) + 1;
+ }
+
+ if (n_ranks > 2) {
+ printf("DDR: The number of physical bank is %02X\n", n_ranks);
+ return 0;
+ }
+
+ /* Check if the number of row of the module is in the range of DDRC */
+ if (spd.nrow_addr < 12 || spd.nrow_addr > 15) {
+ printf("DDR: Row number is out of range of DDRC, row=%02X\n",
+ spd.nrow_addr);
+ return 0;
+ }
+
+ /* Check if the number of col of the module is in the range of DDRC */
+ if (spd.ncol_addr < 8 || spd.ncol_addr > 11) {
+ printf("DDR: Col number is out of range of DDRC, col=%02X\n",
+ spd.ncol_addr);
+ return 0;
+ }
+
+#ifdef CONFIG_SYS_DDRCDR_VALUE
+ /*
+ * Adjust DDR II IO voltage biasing. It just makes it work.
+ */
+ if(spd.mem_type == SPD_MEMTYPE_DDR2) {
+ immap->sysconf.ddrcdr = CONFIG_SYS_DDRCDR_VALUE;
+ }
+ udelay(50000);
+#endif
+
+ /*
+ * ODT configuration recommendation from DDR Controller Chapter.
+ */
+ odt_rd_cfg = 0; /* Never assert ODT */
+ odt_wr_cfg = 0; /* Never assert ODT */
+ if (spd.mem_type == SPD_MEMTYPE_DDR2) {
+ odt_wr_cfg = 1; /* Assert ODT on writes to CSn */
+ }
+
+ /* Setup DDR chip select register */
+#ifdef CONFIG_SYS_83XX_DDR_USES_CS0
+ ddr->csbnds[0].csbnds = (banksize(spd.row_dens) >> 24) - 1;
+ ddr->cs_config[0] = ( 1 << 31
+ | (odt_rd_cfg << 20)
+ | (odt_wr_cfg << 16)
+ | ((spd.nbanks == 8 ? 1 : 0) << 14)
+ | ((spd.nrow_addr - 12) << 8)
+ | (spd.ncol_addr - 8) );
+ debug("\n");
+ debug("cs0_bnds = 0x%08x\n",ddr->csbnds[0].csbnds);
+ debug("cs0_config = 0x%08x\n",ddr->cs_config[0]);
+
+ if (n_ranks == 2) {
+ ddr->csbnds[1].csbnds = ( (banksize(spd.row_dens) >> 8)
+ | ((banksize(spd.row_dens) >> 23) - 1) );
+ ddr->cs_config[1] = ( 1<<31
+ | (odt_rd_cfg << 20)
+ | (odt_wr_cfg << 16)
+ | ((spd.nbanks == 8 ? 1 : 0) << 14)
+ | ((spd.nrow_addr - 12) << 8)
+ | (spd.ncol_addr - 8) );
+ debug("cs1_bnds = 0x%08x\n",ddr->csbnds[1].csbnds);
+ debug("cs1_config = 0x%08x\n",ddr->cs_config[1]);
+ }
+
+#else
+ ddr->csbnds[2].csbnds = (banksize(spd.row_dens) >> 24) - 1;
+ ddr->cs_config[2] = ( 1 << 31
+ | (odt_rd_cfg << 20)
+ | (odt_wr_cfg << 16)
+ | ((spd.nbanks == 8 ? 1 : 0) << 14)
+ | ((spd.nrow_addr - 12) << 8)
+ | (spd.ncol_addr - 8) );
+ debug("\n");
+ debug("cs2_bnds = 0x%08x\n",ddr->csbnds[2].csbnds);
+ debug("cs2_config = 0x%08x\n",ddr->cs_config[2]);
+
+ if (n_ranks == 2) {
+ ddr->csbnds[3].csbnds = ( (banksize(spd.row_dens) >> 8)
+ | ((banksize(spd.row_dens) >> 23) - 1) );
+ ddr->cs_config[3] = ( 1<<31
+ | (odt_rd_cfg << 20)
+ | (odt_wr_cfg << 16)
+ | ((spd.nbanks == 8 ? 1 : 0) << 14)
+ | ((spd.nrow_addr - 12) << 8)
+ | (spd.ncol_addr - 8) );
+ debug("cs3_bnds = 0x%08x\n",ddr->csbnds[3].csbnds);
+ debug("cs3_config = 0x%08x\n",ddr->cs_config[3]);
+ }
+#endif
+
+ /*
+ * Figure out memory size in Megabytes.
+ */
+ memsize = n_ranks * banksize(spd.row_dens) / 0x100000;
+
+ /*
+ * First supported LAW size is 16M, at LAWAR_SIZE_16M == 23.
+ */
+ law_size = 19 + __ilog2(memsize);
+
+ /*
+ * Set up LAWBAR for all of DDR.
+ */
+ ecm->bar = CONFIG_SYS_DDR_SDRAM_BASE & 0xfffff000;
+ ecm->ar = (LAWAR_EN | LAWAR_TRGT_IF_DDR | (LAWAR_SIZE & law_size));
+ debug("DDR:bar=0x%08x\n", ecm->bar);
+ debug("DDR:ar=0x%08x\n", ecm->ar);
+
+ /*
+ * Find the largest CAS by locating the highest 1 bit
+ * in the spd.cas_lat field. Translate it to a DDR
+ * controller field value:
+ *
+ * CAS Lat DDR I DDR II Ctrl
+ * Clocks SPD Bit SPD Bit Value
+ * ------- ------- ------- -----
+ * 1.0 0 0001
+ * 1.5 1 0010
+ * 2.0 2 2 0011
+ * 2.5 3 0100
+ * 3.0 4 3 0101
+ * 3.5 5 0110
+ * 4.0 6 4 0111
+ * 4.5 1000
+ * 5.0 5 1001
+ */
+ caslat = __ilog2(spd.cas_lat);
+ if ((spd.mem_type == SPD_MEMTYPE_DDR)
+ && (caslat > 6)) {
+ printf("DDR I: Invalid SPD CAS Latency: 0x%x.\n", spd.cas_lat);
+ return 0;
+ } else if (spd.mem_type == SPD_MEMTYPE_DDR2
+ && (caslat < 2 || caslat > 5)) {
+ printf("DDR II: Invalid SPD CAS Latency: 0x%x.\n",
+ spd.cas_lat);
+ return 0;
+ }
+ debug("DDR: caslat SPD bit is %d\n", caslat);
+
+ max_bus_clk = 1000 *10 / (((spd.clk_cycle & 0xF0) >> 4) * 10
+ + (spd.clk_cycle & 0x0f));
+ max_data_rate = max_bus_clk * 2;
+
+ debug("DDR:Module maximum data rate is: %d MHz\n", max_data_rate);
+
+ ddrc_clk = gd->mem_clk / 1000000;
+ effective_data_rate = 0;
+
+ if (max_data_rate >= 460) { /* it is DDR2-800, 667, 533 */
+ if (spd.cas_lat & 0x08)
+ caslat = 3;
+ else
+ caslat = 4;
+ if (ddrc_clk <= 460 && ddrc_clk > 350)
+ effective_data_rate = 400;
+ else if (ddrc_clk <=350 && ddrc_clk > 280)
+ effective_data_rate = 333;
+ else if (ddrc_clk <= 280 && ddrc_clk > 230)
+ effective_data_rate = 266;
+ else
+ effective_data_rate = 200;
+ } else if (max_data_rate >= 390 && max_data_rate < 460) { /* it is DDR 400 */
+ if (ddrc_clk <= 460 && ddrc_clk > 350) {
+ /* DDR controller clk at 350~460 */
+ effective_data_rate = 400; /* 5ns */
+ caslat = caslat;
+ } else if (ddrc_clk <= 350 && ddrc_clk > 280) {
+ /* DDR controller clk at 280~350 */
+ effective_data_rate = 333; /* 6ns */
+ if (spd.clk_cycle2 == 0x60)
+ caslat = caslat - 1;
+ else
+ caslat = caslat;
+ } else if (ddrc_clk <= 280 && ddrc_clk > 230) {
+ /* DDR controller clk at 230~280 */
+ effective_data_rate = 266; /* 7.5ns */
+ if (spd.clk_cycle3 == 0x75)
+ caslat = caslat - 2;
+ else if (spd.clk_cycle2 == 0x75)
+ caslat = caslat - 1;
+ else
+ caslat = caslat;
+ } else if (ddrc_clk <= 230 && ddrc_clk > 90) {
+ /* DDR controller clk at 90~230 */
+ effective_data_rate = 200; /* 10ns */
+ if (spd.clk_cycle3 == 0xa0)
+ caslat = caslat - 2;
+ else if (spd.clk_cycle2 == 0xa0)
+ caslat = caslat - 1;
+ else
+ caslat = caslat;
+ }
+ } else if (max_data_rate >= 323) { /* it is DDR 333 */
+ if (ddrc_clk <= 350 && ddrc_clk > 280) {
+ /* DDR controller clk at 280~350 */
+ effective_data_rate = 333; /* 6ns */
+ caslat = caslat;
+ } else if (ddrc_clk <= 280 && ddrc_clk > 230) {
+ /* DDR controller clk at 230~280 */
+ effective_data_rate = 266; /* 7.5ns */
+ if (spd.clk_cycle2 == 0x75)
+ caslat = caslat - 1;
+ else
+ caslat = caslat;
+ } else if (ddrc_clk <= 230 && ddrc_clk > 90) {
+ /* DDR controller clk at 90~230 */
+ effective_data_rate = 200; /* 10ns */
+ if (spd.clk_cycle3 == 0xa0)
+ caslat = caslat - 2;
+ else if (spd.clk_cycle2 == 0xa0)
+ caslat = caslat - 1;
+ else
+ caslat = caslat;
+ }
+ } else if (max_data_rate >= 256) { /* it is DDR 266 */
+ if (ddrc_clk <= 350 && ddrc_clk > 280) {
+ /* DDR controller clk at 280~350 */
+ printf("DDR: DDR controller freq is more than "
+ "max data rate of the module\n");
+ return 0;
+ } else if (ddrc_clk <= 280 && ddrc_clk > 230) {
+ /* DDR controller clk at 230~280 */
+ effective_data_rate = 266; /* 7.5ns */
+ caslat = caslat;
+ } else if (ddrc_clk <= 230 && ddrc_clk > 90) {
+ /* DDR controller clk at 90~230 */
+ effective_data_rate = 200; /* 10ns */
+ if (spd.clk_cycle2 == 0xa0)
+ caslat = caslat - 1;
+ }
+ } else if (max_data_rate >= 190) { /* it is DDR 200 */
+ if (ddrc_clk <= 350 && ddrc_clk > 230) {
+ /* DDR controller clk at 230~350 */
+ printf("DDR: DDR controller freq is more than "
+ "max data rate of the module\n");
+ return 0;
+ } else if (ddrc_clk <= 230 && ddrc_clk > 90) {
+ /* DDR controller clk at 90~230 */
+ effective_data_rate = 200; /* 10ns */
+ caslat = caslat;
+ }
+ }
+
+ debug("DDR:Effective data rate is: %dMHz\n", effective_data_rate);
+ debug("DDR:The MSB 1 of CAS Latency is: %d\n", caslat);
+
+ /*
+ * Errata DDR6 work around: input enable 2 cycles earlier.
+ * including MPC834x Rev1.0/1.1 and MPC8360 Rev1.1/1.2.
+ */
+ if(PVR_MAJ(pvr) <= 1 && spd.mem_type == SPD_MEMTYPE_DDR){
+ if (caslat == 2)
+ ddr->debug_reg = 0x201c0000; /* CL=2 */
+ else if (caslat == 3)
+ ddr->debug_reg = 0x202c0000; /* CL=2.5 */
+ else if (caslat == 4)
+ ddr->debug_reg = 0x202c0000; /* CL=3.0 */
+
+ __asm__ __volatile__ ("sync");
+
+ debug("Errata DDR6 (debug_reg=0x%08x)\n", ddr->debug_reg);
+ }
+
+ /*
+ * Convert caslat clocks to DDR controller value.
+ * Force caslat_ctrl to be DDR Controller field-sized.
+ */
+ if (spd.mem_type == SPD_MEMTYPE_DDR) {
+ caslat_ctrl = (caslat + 1) & 0x07;
+ } else {
+ caslat_ctrl = (2 * caslat - 1) & 0x0f;
+ }
+
+ debug("DDR: effective data rate is %d MHz\n", effective_data_rate);
+ debug("DDR: caslat SPD bit is %d, controller field is 0x%x\n",
+ caslat, caslat_ctrl);
+
+ /*
+ * Timing Config 0.
+ * Avoid writing for DDR I.
+ */
+ if (spd.mem_type == SPD_MEMTYPE_DDR2) {
+ unsigned char taxpd_clk = 8; /* By the book. */
+ unsigned char tmrd_clk = 2; /* By the book. */
+ unsigned char act_pd_exit = 2; /* Empirical? */
+ unsigned char pre_pd_exit = 6; /* Empirical? */
+
+ ddr->timing_cfg_0 = (0
+ | ((act_pd_exit & 0x7) << 20) /* ACT_PD_EXIT */
+ | ((pre_pd_exit & 0x7) << 16) /* PRE_PD_EXIT */
+ | ((taxpd_clk & 0xf) << 8) /* ODT_PD_EXIT */
+ | ((tmrd_clk & 0xf) << 0) /* MRS_CYC */
+ );
+ debug("DDR: timing_cfg_0 = 0x%08x\n", ddr->timing_cfg_0);
+ }
+
+ /*
+ * For DDR I, WRREC(Twr) and WRTORD(Twtr) are not in SPD,
+ * use conservative value.
+ * For DDR II, they are bytes 36 and 37, in quarter nanos.
+ */
+
+ if (spd.mem_type == SPD_MEMTYPE_DDR) {
+ twr_clk = 3; /* Clocks */
+ twtr_clk = 1; /* Clocks */
+ } else {
+ twr_clk = picos_to_clk(spd.twr * 250);
+ twtr_clk = picos_to_clk(spd.twtr * 250);
+ if (twtr_clk < 2)
+ twtr_clk = 2;
+ }
+
+ /*
+ * Calculate Trfc, in picos.
+ * DDR I: Byte 42 straight up in ns.
+ * DDR II: Byte 40 and 42 swizzled some, in ns.
+ */
+ if (spd.mem_type == SPD_MEMTYPE_DDR) {
+ trfc = spd.trfc * 1000; /* up to ps */
+ } else {
+ unsigned int byte40_table_ps[8] = {
+ 0,
+ 250,
+ 330,
+ 500,
+ 660,
+ 750,
+ 0,
+ 0
+ };
+
+ trfc = (((spd.trctrfc_ext & 0x1) * 256) + spd.trfc) * 1000
+ + byte40_table_ps[(spd.trctrfc_ext >> 1) & 0x7];
+ }
+ trfc_clk = picos_to_clk(trfc);
+
+ /*
+ * Trcd, Byte 29, from quarter nanos to ps and clocks.
+ */
+ trcd_clk = picos_to_clk(spd.trcd * 250) & 0x7;
+
+ /*
+ * Convert trfc_clk to DDR controller fields. DDR I should
+ * fit in the REFREC field (16-19) of TIMING_CFG_1, but the
+ * 83xx controller has an extended REFREC field of three bits.
+ * The controller automatically adds 8 clocks to this value,
+ * so preadjust it down 8 first before splitting it up.
+ */
+ trfc_low = (trfc_clk - 8) & 0xf;
+ trfc_high = ((trfc_clk - 8) >> 4) & 0x3;
+
+ ddr->timing_cfg_1 =
+ (((picos_to_clk(spd.trp * 250) & 0x07) << 28 ) | /* PRETOACT */
+ ((picos_to_clk(spd.tras * 1000) & 0x0f ) << 24 ) | /* ACTTOPRE */
+ (trcd_clk << 20 ) | /* ACTTORW */
+ (caslat_ctrl << 16 ) | /* CASLAT */
+ (trfc_low << 12 ) | /* REFEC */
+ ((twr_clk & 0x07) << 8) | /* WRRREC */
+ ((picos_to_clk(spd.trrd * 250) & 0x07) << 4) | /* ACTTOACT */
+ ((twtr_clk & 0x07) << 0) /* WRTORD */
+ );
+
+ /*
+ * Additive Latency
+ * For DDR I, 0.
+ * For DDR II, with ODT enabled, use "a value" less than ACTTORW,
+ * which comes from Trcd, and also note that:
+ * add_lat + caslat must be >= 4
+ */
+ add_lat = 0;
+ if (spd.mem_type == SPD_MEMTYPE_DDR2
+ && (odt_wr_cfg || odt_rd_cfg)
+ && (caslat < 4)) {
+ add_lat = 4 - caslat;
+ if ((add_lat + caslat) < 4) {
+ add_lat = 0;
+ }
+ }
+
+ /*
+ * Write Data Delay
+ * Historically 0x2 == 4/8 clock delay.
+ * Empirically, 0x3 == 6/8 clock delay is suggested for DDR I 266.
+ */
+ wr_data_delay = 2;
+
+ /*
+ * Write Latency
+ * Read to Precharge
+ * Minimum CKE Pulse Width.
+ * Four Activate Window
+ */
+ if (spd.mem_type == SPD_MEMTYPE_DDR) {
+ /*
+ * This is a lie. It should really be 1, but if it is
+ * set to 1, bits overlap into the old controller's
+ * otherwise unused ACSM field. If we leave it 0, then
+ * the HW will magically treat it as 1 for DDR 1. Oh Yea.
+ */
+ wr_lat = 0;
+
+ trtp_clk = 2; /* By the book. */
+ cke_min_clk = 1; /* By the book. */
+ four_act = 1; /* By the book. */
+
+ } else {
+ wr_lat = caslat - 1;
+
+ /* Convert SPD value from quarter nanos to picos. */
+ trtp_clk = picos_to_clk(spd.trtp * 250);
+ if (trtp_clk < 2)
+ trtp_clk = 2;
+ trtp_clk += add_lat;
+
+ cke_min_clk = 3; /* By the book. */
+ four_act = picos_to_clk(37500); /* By the book. 1k pages? */
+ }
+
+ /*
+ * Empirically set ~MCAS-to-preamble override for DDR 2.
+ * Your milage will vary.
+ */
+ cpo = 0;
+ if (spd.mem_type == SPD_MEMTYPE_DDR2) {
+ if (effective_data_rate == 266) {
+ cpo = 0x4; /* READ_LAT + 1/2 */
+ } else if (effective_data_rate == 333) {
+ cpo = 0x6; /* READ_LAT + 1 */
+ } else if (effective_data_rate == 400) {
+ cpo = 0x7; /* READ_LAT + 5/4 */
+ } else {
+ /* Automatic calibration */
+ cpo = 0x1f;
+ }
+ }
+
+ ddr->timing_cfg_2 = (0
+ | ((add_lat & 0x7) << 28) /* ADD_LAT */
+ | ((cpo & 0x1f) << 23) /* CPO */
+ | ((wr_lat & 0x7) << 19) /* WR_LAT */
+ | ((trtp_clk & 0x7) << 13) /* RD_TO_PRE */
+ | ((wr_data_delay & 0x7) << 10) /* WR_DATA_DELAY */
+ | ((cke_min_clk & 0x7) << 6) /* CKE_PLS */
+ | ((four_act & 0x1f) << 0) /* FOUR_ACT */
+ );
+
+ debug("DDR:timing_cfg_1=0x%08x\n", ddr->timing_cfg_1);
+ debug("DDR:timing_cfg_2=0x%08x\n", ddr->timing_cfg_2);
+
+ /* Check DIMM data bus width */
+ if (spd.dataw_lsb < 64) {
+ if (spd.mem_type == SPD_MEMTYPE_DDR)
+ burstlen = 0x03; /* 32 bit data bus, burst len is 8 */
+ else
+ burstlen = 0x02; /* 32 bit data bus, burst len is 4 */
+ debug("\n DDR DIMM: data bus width is 32 bit");
+ } else {
+ burstlen = 0x02; /* Others act as 64 bit bus, burst len is 4 */
+ debug("\n DDR DIMM: data bus width is 64 bit");
+ }
+
+ /* Is this an ECC DDR chip? */
+ if (spd.config == 0x02)
+ debug(" with ECC\n");
+ else
+ debug(" without ECC\n");
+
+ /* Burst length is always 4 for 64 bit data bus, 8 for 32 bit data bus,
+ Burst type is sequential
+ */
+ if (spd.mem_type == SPD_MEMTYPE_DDR) {
+ switch (caslat) {
+ case 1:
+ ddr->sdram_mode = 0x50 | burstlen; /* CL=1.5 */
+ break;
+ case 2:
+ ddr->sdram_mode = 0x20 | burstlen; /* CL=2.0 */
+ break;
+ case 3:
+ ddr->sdram_mode = 0x60 | burstlen; /* CL=2.5 */
+ break;
+ case 4:
+ ddr->sdram_mode = 0x30 | burstlen; /* CL=3.0 */
+ break;
+ default:
+ printf("DDR:only CL 1.5, 2.0, 2.5, 3.0 is supported\n");
+ return 0;
+ }
+ } else {
+ mode_odt_enable = 0x0; /* Default disabled */
+ if (odt_wr_cfg || odt_rd_cfg) {
+ /*
+ * Bits 6 and 2 in Extended MRS(1)
+ * Bit 2 == 0x04 == 75 Ohm, with 2 DIMM modules.
+ * Bit 6 == 0x40 == 150 Ohm, with 1 DIMM module.
+ */
+ mode_odt_enable = 0x40; /* 150 Ohm */
+ }
+
+ ddr->sdram_mode =
+ (0
+ | (1 << (16 + 10)) /* DQS Differential disable */
+ | (add_lat << (16 + 3)) /* Additive Latency in EMRS1 */
+ | (mode_odt_enable << 16) /* ODT Enable in EMRS1 */
+ | ((twr_clk - 1) << 9) /* Write Recovery Autopre */
+ | (caslat << 4) /* caslat */
+ | (burstlen << 0) /* Burst length */
+ );
+ }
+ debug("DDR:sdram_mode=0x%08x\n", ddr->sdram_mode);
+
+ /*
+ * Clear EMRS2 and EMRS3.
+ */
+ ddr->sdram_mode2 = 0;
+ debug("DDR: sdram_mode2 = 0x%08x\n", ddr->sdram_mode2);
+
+ switch (spd.refresh) {
+ case 0x00:
+ case 0x80:
+ refresh_clk = picos_to_clk(15625000);
+ break;
+ case 0x01:
+ case 0x81:
+ refresh_clk = picos_to_clk(3900000);
+ break;
+ case 0x02:
+ case 0x82:
+ refresh_clk = picos_to_clk(7800000);
+ break;
+ case 0x03:
+ case 0x83:
+ refresh_clk = picos_to_clk(31300000);
+ break;
+ case 0x04:
+ case 0x84:
+ refresh_clk = picos_to_clk(62500000);
+ break;
+ case 0x05:
+ case 0x85:
+ refresh_clk = picos_to_clk(125000000);
+ break;
+ default:
+ refresh_clk = 0x512;
+ break;
+ }
+
+ /*
+ * Set BSTOPRE to 0x100 for page mode
+ * If auto-charge is used, set BSTOPRE = 0
+ */
+ ddr->sdram_interval = ((refresh_clk & 0x3fff) << 16) | 0x100;
+ debug("DDR:sdram_interval=0x%08x\n", ddr->sdram_interval);
+
+ /*
+ * SDRAM Cfg 2
+ */
+ odt_cfg = 0;
+#ifndef CONFIG_NEVER_ASSERT_ODT_TO_CPU
+ if (odt_rd_cfg | odt_wr_cfg) {
+ odt_cfg = 0x2; /* ODT to IOs during reads */
+ }
+#endif
+ if (spd.mem_type == SPD_MEMTYPE_DDR2) {
+ ddr->sdram_cfg2 = (0
+ | (0 << 26) /* True DQS */
+ | (odt_cfg << 21) /* ODT only read */
+ | (1 << 12) /* 1 refresh at a time */
+ );
+
+ debug("DDR: sdram_cfg2 = 0x%08x\n", ddr->sdram_cfg2);
+ }
+
+#ifdef CONFIG_SYS_DDR_SDRAM_CLK_CNTL /* Optional platform specific value */
+ ddr->sdram_clk_cntl = CONFIG_SYS_DDR_SDRAM_CLK_CNTL;
+#endif
+ debug("DDR:sdram_clk_cntl=0x%08x\n", ddr->sdram_clk_cntl);
+
+ asm("sync;isync");
+
+ udelay(600);
+
+ /*
+ * Figure out the settings for the sdram_cfg register. Build up
+ * the value in 'sdram_cfg' before writing since the write into
+ * the register will actually enable the memory controller, and all
+ * settings must be done before enabling.
+ *
+ * sdram_cfg[0] = 1 (ddr sdram logic enable)
+ * sdram_cfg[1] = 1 (self-refresh-enable)
+ * sdram_cfg[5:7] = (SDRAM type = DDR SDRAM)
+ * 010 DDR 1 SDRAM
+ * 011 DDR 2 SDRAM
+ * sdram_cfg[12] = 0 (32_BE =0 , 64 bit bus mode)
+ * sdram_cfg[13] = 0 (8_BE =0, 4-beat bursts)
+ */
+ if (spd.mem_type == SPD_MEMTYPE_DDR)
+ sdram_type = SDRAM_CFG_SDRAM_TYPE_DDR1;
+ else
+ sdram_type = SDRAM_CFG_SDRAM_TYPE_DDR2;
+
+ sdram_cfg = (0
+ | SDRAM_CFG_MEM_EN /* DDR enable */
+ | SDRAM_CFG_SREN /* Self refresh */
+ | sdram_type /* SDRAM type */
+ );
+
+ /* sdram_cfg[3] = RD_EN - registered DIMM enable */
+ if (spd.mod_attr & 0x02)
+ sdram_cfg |= SDRAM_CFG_RD_EN;
+
+ /* The DIMM is 32bit width */
+ if (spd.dataw_lsb < 64) {
+ if (spd.mem_type == SPD_MEMTYPE_DDR)
+ sdram_cfg |= SDRAM_CFG_32_BE | SDRAM_CFG_8_BE;
+ if (spd.mem_type == SPD_MEMTYPE_DDR2)
+ sdram_cfg |= SDRAM_CFG_32_BE;
+ }
+
+ ddrc_ecc_enable = 0;
+
+#if defined(CONFIG_DDR_ECC)
+ /* Enable ECC with sdram_cfg[2] */
+ if (spd.config == 0x02) {
+ sdram_cfg |= 0x20000000;
+ ddrc_ecc_enable = 1;
+ /* disable error detection */
+ ddr->err_disable = ~ECC_ERROR_ENABLE;
+ /* set single bit error threshold to maximum value,
+ * reset counter to zero */
+ ddr->err_sbe = (255 << ECC_ERROR_MAN_SBET_SHIFT) |
+ (0 << ECC_ERROR_MAN_SBEC_SHIFT);
+ }
+
+ debug("DDR:err_disable=0x%08x\n", ddr->err_disable);
+ debug("DDR:err_sbe=0x%08x\n", ddr->err_sbe);
+#endif
+ debug(" DDRC ECC mode: %s\n", ddrc_ecc_enable ? "ON":"OFF");
+
+#if defined(CONFIG_DDR_2T_TIMING)
+ /*
+ * Enable 2T timing by setting sdram_cfg[16].
+ */
+ sdram_cfg |= SDRAM_CFG_2T_EN;
+#endif
+ /* Enable controller, and GO! */
+ ddr->sdram_cfg = sdram_cfg;
+ asm("sync;isync");
+ udelay(500);
+
+ debug("DDR:sdram_cfg=0x%08x\n", ddr->sdram_cfg);
+ return memsize; /*in MBytes*/
+}
+#endif /* CONFIG_SPD_EEPROM */
+
+#if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
+/*
+ * Use timebase counter, get_timer() is not availabe
+ * at this point of initialization yet.
+ */
+static __inline__ unsigned long get_tbms (void)
+{
+ unsigned long tbl;
+ unsigned long tbu1, tbu2;
+ unsigned long ms;
+ unsigned long long tmp;
+
+ ulong tbclk = get_tbclk();
+
+ /* get the timebase ticks */
+ do {
+ asm volatile ("mftbu %0":"=r" (tbu1):);
+ asm volatile ("mftb %0":"=r" (tbl):);
+ asm volatile ("mftbu %0":"=r" (tbu2):);
+ } while (tbu1 != tbu2);
+
+ /* convert ticks to ms */
+ tmp = (unsigned long long)(tbu1);
+ tmp = (tmp << 32);
+ tmp += (unsigned long long)(tbl);
+ ms = tmp/(tbclk/1000);
+
+ return ms;
+}
+
+/*
+ * Initialize all of memory for ECC, then enable errors.
+ */
+void ddr_enable_ecc(unsigned int dram_size)
+{
+ volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
+ volatile ddr83xx_t *ddr= &immap->ddr;
+ unsigned long t_start, t_end;
+ register u64 *p;
+ register uint size;
+ unsigned int pattern[2];
+
+ icache_enable();
+ t_start = get_tbms();
+ pattern[0] = 0xdeadbeef;
+ pattern[1] = 0xdeadbeef;
+
+#if defined(CONFIG_DDR_ECC_INIT_VIA_DMA)
+ dma_meminit(pattern[0], dram_size);
+#else
+ debug("ddr init: CPU FP write method\n");
+ size = dram_size;
+ for (p = 0; p < (u64*)(size); p++) {
+ ppcDWstore((u32*)p, pattern);
+ }
+ __asm__ __volatile__ ("sync");
+#endif
+
+ t_end = get_tbms();
+ icache_disable();
+
+ debug("\nREADY!!\n");
+ debug("ddr init duration: %ld ms\n", t_end - t_start);
+
+ /* Clear All ECC Errors */
+ if ((ddr->err_detect & ECC_ERROR_DETECT_MME) == ECC_ERROR_DETECT_MME)
+ ddr->err_detect |= ECC_ERROR_DETECT_MME;
+ if ((ddr->err_detect & ECC_ERROR_DETECT_MBE) == ECC_ERROR_DETECT_MBE)
+ ddr->err_detect |= ECC_ERROR_DETECT_MBE;
+ if ((ddr->err_detect & ECC_ERROR_DETECT_SBE) == ECC_ERROR_DETECT_SBE)
+ ddr->err_detect |= ECC_ERROR_DETECT_SBE;
+ if ((ddr->err_detect & ECC_ERROR_DETECT_MSE) == ECC_ERROR_DETECT_MSE)
+ ddr->err_detect |= ECC_ERROR_DETECT_MSE;
+
+ /* Disable ECC-Interrupts */
+ ddr->err_int_en &= ECC_ERR_INT_DISABLE;
+
+ /* Enable errors for ECC */
+ ddr->err_disable &= ECC_ERROR_ENABLE;
+
+ __asm__ __volatile__ ("sync");
+ __asm__ __volatile__ ("isync");
+}
+#endif /* CONFIG_DDR_ECC */
generated by cgit v1.1 at 2024-10-31 01:56:30 +0000