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-rw-r--r--cpu/mpc83xx/spd_sdram.c918
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diff --git a/cpu/mpc83xx/spd_sdram.c b/cpu/mpc83xx/spd_sdram.c
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--- a/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 2024-08-25 17:43:07 +0000