+++ /dev/null
-/*
- * Copyright 2004 Freescale Semiconductor.
- * (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 <i2c.h>
-#include <spd.h>
-#include <asm/mmu.h>
-#include <asm/fsl_law.h>
-
-#if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
-extern void dma_init(void);
-extern uint dma_check(void);
-extern int dma_xfer(void *dest, uint count, void *src);
-#endif
-
-#ifdef CONFIG_SPD_EEPROM
-
-#ifndef CFG_READ_SPD
-#define CFG_READ_SPD i2c_read
-#endif
-
-/*
- * Only one of the following three should be 1; others should be 0
- * By default the cache line interleaving is selected if
- * the CONFIG_DDR_INTERLEAVE flag is defined
- */
-#define CFG_PAGE_INTERLEAVING 0
-#define CFG_BANK_INTERLEAVING 0
-#define CFG_SUPER_BANK_INTERLEAVING 0
-
-/*
- * Convert picoseconds into DRAM clock cycles (rounding up if needed).
- */
-
-static unsigned int
-picos_to_clk(unsigned int picos)
-{
- /* use unsigned long long to avoid rounding errors */
- const unsigned long long ULL_2e12 = 2000000000000ULL;
- unsigned long long clks;
- unsigned long long clks_temp;
-
- if (! picos)
- return 0;
-
- clks = get_bus_freq(0) * (unsigned long long) picos;
- clks_temp = clks;
- clks = clks / ULL_2e12;
- if (clks_temp % ULL_2e12) {
- clks++;
- }
-
- if (clks > 0xFFFFFFFFULL) {
- clks = 0xFFFFFFFFULL;
- }
-
- return (unsigned int) clks;
-}
-
-
-/*
- * Calculate the Density of each Physical Rank.
- * Returned size is in bytes.
- *
- * Study these table from Byte 31 of JEDEC SPD Spec.
- *
- * DDR I DDR II
- * Bit Size Size
- * --- ----- ------
- * 7 high 512MB 512MB
- * 6 256MB 256MB
- * 5 128MB 128MB
- * 4 64MB 16GB
- * 3 32MB 8GB
- * 2 16MB 4GB
- * 1 2GB 2GB
- * 0 low 1GB 1GB
- *
- * Reorder Table to be linear by stripping the bottom
- * 2 or 5 bits off and shifting them up to the top.
- */
-
-unsigned int
-compute_banksize(unsigned int mem_type, unsigned char row_dens)
-{
- unsigned int bsize;
-
- if (mem_type == SPD_MEMTYPE_DDR) {
- /* Bottom 2 bits up to the top. */
- bsize = ((row_dens >> 2) | ((row_dens & 3) << 6)) << 24;
- debug("DDR: DDR I rank density = 0x%08x\n", bsize);
- } else {
- /* Bottom 5 bits up to the top. */
- bsize = ((row_dens >> 5) | ((row_dens & 31) << 3)) << 27;
- debug("DDR: DDR II rank density = 0x%08x\n", bsize);
- }
- return bsize;
-}
-
-
-/*
- * Convert a two-nibble BCD value into a cycle time.
- * While the spec calls for nano-seconds, picos are returned.
- *
- * This implements the tables for bytes 9, 23 and 25 for both
- * DDR I and II. No allowance for distinguishing the invalid
- * fields absent for DDR I yet present in DDR II is made.
- * (That is, cycle times of .25, .33, .66 and .75 ns are
- * allowed for both DDR II and I.)
- */
-
-unsigned int
-convert_bcd_tenths_to_cycle_time_ps(unsigned int spd_val)
-{
- /*
- * Table look up the lower nibble, allow DDR I & II.
- */
- unsigned int tenths_ps[16] = {
- 0,
- 100,
- 200,
- 300,
- 400,
- 500,
- 600,
- 700,
- 800,
- 900,
- 250,
- 330,
- 660,
- 750,
- 0, /* undefined */
- 0 /* undefined */
- };
-
- unsigned int whole_ns = (spd_val & 0xF0) >> 4;
- unsigned int tenth_ns = spd_val & 0x0F;
- unsigned int ps = whole_ns * 1000 + tenths_ps[tenth_ns];
-
- return ps;
-}
-
-
-/*
- * 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_init(unsigned char i2c_address, unsigned int ddr_num,
- unsigned int dimm_num, unsigned int start_addr)
-{
- volatile immap_t *immap = (immap_t *)CFG_IMMR;
- volatile ccsr_ddr_t *ddr;
- volatile ccsr_gur_t *gur = &immap->im_gur;
- spd_eeprom_t spd;
- unsigned int n_ranks;
- unsigned int rank_density;
- unsigned int odt_rd_cfg, odt_wr_cfg, ba_bits;
- unsigned int odt_cfg, mode_odt_enable;
- unsigned int refresh_clk;
-#ifdef MPC86xx_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;
- unsigned int busfreq;
- unsigned int memsize;
- unsigned char caslat, caslat_ctrl;
- unsigned int trfc, trfc_clk, trfc_low, trfc_high;
- unsigned int trcd_clk;
- unsigned int trtp_clk;
- unsigned char cke_min_clk;
- unsigned char add_lat;
- unsigned char wr_lat;
- unsigned char wr_data_delay;
- unsigned char four_act;
- unsigned char cpo;
- unsigned char burst_len;
- unsigned int mode_caslat;
- unsigned char d_init;
- unsigned int tCycle_ps, modfreq;
-
- if (ddr_num == 1)
- ddr = &immap->im_ddr1;
- else
- ddr = &immap->im_ddr2;
-
- /*
- * Read SPD information.
- */
- debug("Performing SPD read at I2C address 0x%02lx\n",i2c_address);
- memset((void *)&spd, 0, sizeof(spd));
- CFG_READ_SPD(i2c_address, 0, 1, (uchar *) &spd, sizeof(spd));
-
- /*
- * Check for supported memory module types.
- */
- if (spd.mem_type != SPD_MEMTYPE_DDR &&
- spd.mem_type != SPD_MEMTYPE_DDR2) {
- debug("Warning: Unable to locate DDR I or DDR II module for DIMM %d of DDR controller %d.\n"
- " Fundamental memory type is 0x%0x\n",
- dimm_num,
- ddr_num,
- spd.mem_type);
- return 0;
- }
-
- debug("\nFound memory of type 0x%02lx ", spd.mem_type);
- if (spd.mem_type == SPD_MEMTYPE_DDR)
- debug("DDR I\n");
- else
- debug("DDR II\n");
-
- /*
- * These test gloss over DDR I and II differences in interpretation
- * of bytes 3 and 4, but irrelevantly. Multiple asymmetric banks
- * are not supported on DDR I; and not encoded on DDR II.
- *
- * Also note that the 8548 controller can support:
- * 12 <= nrow <= 16
- * and
- * 8 <= ncol <= 11 (still, for DDR)
- * 6 <= ncol <= 9 (for FCRAM)
- */
- if (spd.nrow_addr < 12 || spd.nrow_addr > 14) {
- printf("DDR: Unsupported number of Row Addr lines: %d.\n",
- spd.nrow_addr);
- return 0;
- }
- if (spd.ncol_addr < 8 || spd.ncol_addr > 11) {
- printf("DDR: Unsupported number of Column Addr lines: %d.\n",
- spd.ncol_addr);
- return 0;
- }
-
- /*
- * Determine the number of physical banks controlled by
- * different Chip Select signals. This is not quite the
- * same as the number of DIMM modules on the board. Feh.
- */
- if (spd.mem_type == SPD_MEMTYPE_DDR) {
- n_ranks = spd.nrows;
- } else {
- n_ranks = (spd.nrows & 0x7) + 1;
- }
-
- debug("DDR: number of ranks = %d\n", n_ranks);
-
- if (n_ranks > 2) {
- printf("DDR: Only 2 chip selects are supported: %d\n",
- n_ranks);
- return 0;
- }
-
- /*
- * Adjust DDR II IO voltage biasing. Rev1 only
- */
- if (((get_svr() & 0xf0) == 0x10) && (spd.mem_type == SPD_MEMTYPE_DDR2)) {
- gur->ddrioovcr = (0
- | 0x80000000 /* Enable */
- | 0x10000000 /* VSEL to 1.8V */
- );
- }
-
- /*
- * Determine the size of each Rank in bytes.
- */
- rank_density = compute_banksize(spd.mem_type, spd.row_dens);
-
- debug("Start address for this controller is 0x%08lx\n", start_addr);
-
- /*
- * 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 CS0 */
- }
-
- ba_bits = 0;
- if (spd.nbanks == 0x8)
- ba_bits = 1;
-
-#ifdef CONFIG_DDR_INTERLEAVE
-
- if (dimm_num != 1) {
- printf("For interleaving memory on HPCN, need to use DIMM 1 for DDR Controller %d !\n", ddr_num);
- return 0;
- } else {
- /*
- * Since interleaved memory only uses CS0, the
- * memory sticks have to be identical in size and quantity
- * of ranks. That essentially gives double the size on
- * one rank, i.e on CS0 for both controllers put together.
- * Confirm this???
- */
- rank_density *= 2;
-
- /*
- * Eg: Bounds: 0x0000_0000 to 0x0f000_0000 first 256 Meg
- */
- start_addr = 0;
- ddr->cs0_bnds = (start_addr >> 8)
- | (((start_addr + rank_density - 1) >> 24));
- /*
- * Default interleaving mode to cache-line interleaving.
- */
- ddr->cs0_config = ( 1 << 31
-#if (CFG_PAGE_INTERLEAVING == 1)
- | (PAGE_INTERLEAVING)
-#elif (CFG_BANK_INTERLEAVING == 1)
- | (BANK_INTERLEAVING)
-#elif (CFG_SUPER_BANK_INTERLEAVING == 1)
- | (SUPER_BANK_INTERLEAVING)
-#else
- | (CACHE_LINE_INTERLEAVING)
-#endif
- | (odt_rd_cfg << 20)
- | (odt_wr_cfg << 16)
- | (ba_bits << 14)
- | (spd.nrow_addr - 12) << 8
- | (spd.ncol_addr - 8) );
-
- debug("DDR: cs0_bnds = 0x%08x\n", ddr->cs0_bnds);
- debug("DDR: cs0_config = 0x%08x\n", ddr->cs0_config);
-
- /*
- * Adjustment for dual rank memory to get correct memory
- * size (return value of this function).
- */
- if (n_ranks == 2) {
- n_ranks = 1;
- rank_density /= 2;
- } else {
- rank_density /= 2;
- }
- }
-#else /* CONFIG_DDR_INTERLEAVE */
-
- if (dimm_num == 1) {
- /*
- * Eg: Bounds: 0x0000_0000 to 0x0f000_0000 first 256 Meg
- */
- ddr->cs0_bnds = (start_addr >> 8)
- | (((start_addr + rank_density - 1) >> 24));
-
- 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("DDR: cs0_bnds = 0x%08x\n", ddr->cs0_bnds);
- debug("DDR: cs0_config = 0x%08x\n", ddr->cs0_config);
-
- if (n_ranks == 2) {
- /*
- * Eg: Bounds: 0x1000_0000 to 0x1f00_0000,
- * second 256 Meg
- */
- ddr->cs1_bnds = (((start_addr + rank_density) >> 8)
- | (( start_addr + 2*rank_density - 1)
- >> 24));
- ddr->cs1_config = ( 1<<31
- | (odt_rd_cfg << 20)
- | (odt_wr_cfg << 16)
- | (ba_bits << 14)
- | (spd.nrow_addr - 12) << 8
- | (spd.ncol_addr - 8) );
- debug("DDR: cs1_bnds = 0x%08x\n", ddr->cs1_bnds);
- debug("DDR: cs1_config = 0x%08x\n", ddr->cs1_config);
- }
-
- } else {
- /*
- * This is the 2nd DIMM slot for this controller
- */
- /*
- * Eg: Bounds: 0x0000_0000 to 0x0f000_0000 first 256 Meg
- */
- ddr->cs2_bnds = (start_addr >> 8)
- | (((start_addr + rank_density - 1) >> 24));
-
- ddr->cs2_config = ( 1 << 31
- | (odt_rd_cfg << 20)
- | (odt_wr_cfg << 16)
- | (ba_bits << 14)
- | (spd.nrow_addr - 12) << 8
- | (spd.ncol_addr - 8) );
-
- debug("DDR: cs2_bnds = 0x%08x\n", ddr->cs2_bnds);
- debug("DDR: cs2_config = 0x%08x\n", ddr->cs2_config);
-
- if (n_ranks == 2) {
- /*
- * Eg: Bounds: 0x1000_0000 to 0x1f00_0000,
- * second 256 Meg
- */
- ddr->cs3_bnds = (((start_addr + rank_density) >> 8)
- | (( start_addr + 2*rank_density - 1)
- >> 24));
- ddr->cs3_config = ( 1<<31
- | (odt_rd_cfg << 20)
- | (odt_wr_cfg << 16)
- | (ba_bits << 14)
- | (spd.nrow_addr - 12) << 8
- | (spd.ncol_addr - 8) );
- debug("DDR: cs3_bnds = 0x%08x\n", ddr->cs3_bnds);
- debug("DDR: cs3_config = 0x%08x\n", ddr->cs3_config);
- }
- }
-#endif /* CONFIG_DDR_INTERLEAVE */
-
- /*
- * 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 4 0111
- * 4.5 1000
- * 5.0 5 1001
- */
- caslat = __ilog2(spd.cas_lat);
- if ((spd.mem_type == SPD_MEMTYPE_DDR)
- && (caslat > 5)) {
- 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);
-
- /*
- * Calculate the Maximum Data Rate based on the Minimum Cycle time.
- * The SPD clk_cycle field (tCKmin) is measured in tenths of
- * nanoseconds and represented as BCD.
- */
- tCKmin_ps = convert_bcd_tenths_to_cycle_time_ps(spd.clk_cycle);
- debug("DDR: tCKmin = %d ps\n", tCKmin_ps);
-
- /*
- * Double-data rate, scaled 1000 to picoseconds, and back down to MHz.
- */
- max_data_rate = 2 * 1000 * 1000 / tCKmin_ps;
- debug("DDR: Module max data rate = %d Mhz\n", max_data_rate);
-
-
- /*
- * Adjust the CAS Latency to allow for bus speeds that
- * are slower than the DDR module.
- */
- busfreq = get_bus_freq(0) / 1000000; /* MHz */
- tCycle_ps = convert_bcd_tenths_to_cycle_time_ps(spd.clk_cycle3);
- modfreq = 2 * 1000 * 1000 / tCycle_ps;
-
- if ((spd.mem_type == SPD_MEMTYPE_DDR2) && (busfreq < 266)) {
- printf("DDR: platform frequency too low for correct DDR2 controller operation\n");
- return 0;
- } else if (busfreq < 90) {
- printf("DDR: platform frequency too low for correct DDR1 operation\n");
- return 0;
- }
-
- if ((busfreq <= modfreq) && (spd.cas_lat & (1 << (caslat - 2)))) {
- caslat -= 2;
- } else {
- tCycle_ps = convert_bcd_tenths_to_cycle_time_ps(spd.clk_cycle2);
- modfreq = 2 * 1000 * 1000 / tCycle_ps;
- if ((busfreq <= modfreq) && (spd.cas_lat & (1 << (caslat - 1))))
- caslat -= 1;
- else if (busfreq > max_data_rate) {
- printf("DDR: Bus freq %d MHz is not fit for DDR rate %d MHz\n",
- busfreq, max_data_rate);
- return 0;
- }
- }
-
- /*
- * Empirically set ~MCAS-to-preamble override for DDR 2.
- * Your milage will vary.
- */
- cpo = 0;
- if (spd.mem_type == SPD_MEMTYPE_DDR2) {
- if (busfreq <= 333) {
- cpo = 0x7;
- } else if (busfreq <= 400) {
- cpo = 0x9;
- } else {
- cpo = 0xa;
- }
- }
-
- /*
- * 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: caslat SPD bit is %d, controller field is 0x%x\n",
- caslat, caslat_ctrl);
-
- /*
- * Timing Config 0.
- * Avoid writing for DDR I. The new PQ38 DDR controller
- * dreams up non-zero default values to be backwards compatible.
- */
- 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);
-
- }
-
-
- /*
- * Some Timing Config 1 values now.
- * Sneak Extended Refresh Recovery in here too.
- */
-
- /*
- * 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);
- }
-
- /*
- * 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
- * 8548 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;
-
- /*
- * Sneak in some Extended Refresh Recovery.
- */
- ddr->timing_cfg_3 = (trfc_high << 16);
- debug("DDR: timing_cfg_3 = 0x%08x\n", ddr->timing_cfg_3);
-
- ddr->timing_cfg_1 =
- (0
- | ((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 */
- );
-
- debug("DDR: timing_cfg_1 = 0x%08x\n", ddr->timing_cfg_1);
-
-
- /*
- * Timing_Config_2
- * Was: 0x00000800;
- */
-
- /*
- * 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 >= trcd_clk) {
- add_lat = trcd_clk - 1;
- }
- }
-
- /*
- * Write Data Delay
- * Historically 0x2 == 4/8 clock delay.
- * Empirically, 0x3 == 6/8 clock delay is suggested for DDR I 266.
- */
- wr_data_delay = 3;
-
- /*
- * 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);
-
- cke_min_clk = 3; /* By the book. */
- four_act = picos_to_clk(37500); /* By the book. 1k pages? */
- }
-
- 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_2 = 0x%08x\n", ddr->timing_cfg_2);
-
-
- /*
- * Determine the Mode Register Set.
- *
- * This is nominally part specific, but it appears to be
- * consistent for all DDR I devices, and for all DDR II devices.
- *
- * caslat must be programmed
- * burst length is always 4
- * burst type is sequential
- *
- * For DDR I:
- * operating mode is "normal"
- *
- * For DDR II:
- * other stuff
- */
-
- mode_caslat = 0;
-
- /*
- * Table lookup from DDR I or II Device Operation Specs.
- */
- if (spd.mem_type == SPD_MEMTYPE_DDR) {
- if (1 <= caslat && caslat <= 4) {
- unsigned char mode_caslat_table[4] = {
- 0x5, /* 1.5 clocks */
- 0x2, /* 2.0 clocks */
- 0x6, /* 2.5 clocks */
- 0x3 /* 3.0 clocks */
- };
- mode_caslat = mode_caslat_table[caslat - 1];
- } else {
- puts("DDR I: Only CAS Latencies of 1.5, 2.0, "
- "2.5 and 3.0 clocks are supported.\n");
- return 0;
- }
-
- } else {
- if (2 <= caslat && caslat <= 5) {
- mode_caslat = caslat;
- } else {
- puts("DDR II: Only CAS Latencies of 2.0, 3.0, "
- "4.0 and 5.0 clocks are supported.\n");
- return 0;
- }
- }
-
- /*
- * Encoded Burst Length of 4.
- */
- burst_len = 2; /* Fiat. */
-
- if (spd.mem_type == SPD_MEMTYPE_DDR) {
- twr_auto_clk = 0; /* Historical */
- } else {
- /*
- * Determine tCK max in picos. Grab tWR and convert to picos.
- * Auto-precharge write recovery is:
- * WR = roundup(tWR_ns/tCKmax_ns).
- *
- * Ponder: Is twr_auto_clk different than twr_clk?
- */
- tCKmax_ps = convert_bcd_tenths_to_cycle_time_ps(spd.tckmax);
- twr_auto_clk = (spd.twr * 250 + tCKmax_ps - 1) / tCKmax_ps;
- }
-
- /*
- * Mode Reg in bits 16 ~ 31,
- * Extended Mode Reg 1 in bits 0 ~ 15.
- */
- 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_1 =
- (0
- | (add_lat << (16 + 3)) /* Additive Latency in EMRS1 */
- | (mode_odt_enable << 16) /* ODT Enable in EMRS1 */
- | (twr_auto_clk << 9) /* Write Recovery Autopre */
- | (mode_caslat << 4) /* caslat */
- | (burst_len << 0) /* Burst length */
- );
-
- debug("DDR: sdram_mode = 0x%08x\n", ddr->sdram_mode_1);
-
- /*
- * Clear EMRS2 and EMRS3.
- */
- ddr->sdram_mode_2 = 0;
- debug("DDR: sdram_mode_2 = 0x%08x\n", ddr->sdram_mode_2);
-
- /*
- * Determine Refresh Rate.
- */
- refresh_clk = determine_refresh_rate(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);
-
-
- /*
- * 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)
- if (spd.config == 0x02) {
- ddr->err_disable = 0x0000000d;
- 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
-
- asm volatile("sync;isync");
- udelay(500);
-
- /*
- * SDRAM Cfg 2
- */
-
- /*
- * When ODT is enabled, Chap 9 suggests asserting ODT to
- * internal IOs only during reads.
- */
- odt_cfg = 0;
- if (odt_rd_cfg | odt_wr_cfg) {
- odt_cfg = 0x2; /* ODT to IOs during reads */
- }
-
- /*
- * Try to use differential DQS with DDR II.
- */
- if (spd.mem_type == SPD_MEMTYPE_DDR) {
- dqs_cfg = 0; /* No Differential DQS for DDR I */
- } else {
- dqs_cfg = 0x1; /* Differential DQS for DDR II */
- }
-
-#if defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
- /*
- * Use the DDR controller to auto initialize memory.
- */
- d_init = 1;
- ddr->sdram_data_init = CONFIG_MEM_INIT_VALUE;
- debug("DDR: ddr_data_init = 0x%08x\n", ddr->sdram_data_init);
-#else
- /*
- * Memory will be initialized via DMA, or not at all.
- */
- d_init = 0;
-#endif
-
- ddr->sdram_cfg_2 = (0
- | (dqs_cfg << 26) /* Differential DQS */
- | (odt_cfg << 21) /* ODT */
- | (d_init << 4) /* D_INIT auto init DDR */
- );
-
- debug("DDR: sdram_cfg_2 = 0x%08x\n", ddr->sdram_cfg_2);
-
-
-#ifdef MPC86xx_DDR_SDRAM_CLK_CNTL
- /*
- * 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;
-
- ddr->sdram_clk_cntl = (0
- | 0x80000000
- | (clk_adjust << 23)
- );
- debug("DDR: sdram_clk_cntl = 0x%08x\n", ddr->sdram_clk_cntl);
-#endif
-
- /*
- * Figure out memory size in Megabytes.
- */
- debug("# ranks = %d, rank_density = 0x%08lx\n", n_ranks, rank_density);
- memsize = n_ranks * rank_density / 0x100000;
- return memsize;
-}
-
-
-unsigned int enable_ddr(unsigned int ddr_num)
-{
- volatile immap_t *immap = (immap_t *)CFG_IMMR;
- spd_eeprom_t spd1,spd2;
- volatile ccsr_ddr_t *ddr;
- unsigned sdram_cfg_1;
- unsigned char sdram_type, mem_type, mod_attr;
- unsigned char d_init;
- unsigned int no_dimm1=0, no_dimm2=0;
-
- /* Set up pointer to enable the current ddr controller */
- if (ddr_num == 1)
- ddr = &immap->im_ddr1;
- else
- ddr = &immap->im_ddr2;
-
- /*
- * Read both dimm slots and decide whether
- * or not to enable this controller.
- */
- memset((void *)&spd1, 0, sizeof(spd1));
- memset((void *)&spd2, 0, sizeof(spd2));
-
- if (ddr_num == 1) {
- CFG_READ_SPD(SPD_EEPROM_ADDRESS1,
- 0, 1, (uchar *) &spd1, sizeof(spd1));
-#if defined(SPD_EEPROM_ADDRESS2)
- CFG_READ_SPD(SPD_EEPROM_ADDRESS2,
- 0, 1, (uchar *) &spd2, sizeof(spd2));
-#endif
- } else {
-#if defined(SPD_EEPROM_ADDRESS3)
- CFG_READ_SPD(SPD_EEPROM_ADDRESS3,
- 0, 1, (uchar *) &spd1, sizeof(spd1));
-#endif
-#if defined(SPD_EEPROM_ADDRESS4)
- CFG_READ_SPD(SPD_EEPROM_ADDRESS4,
- 0, 1, (uchar *) &spd2, sizeof(spd2));
-#endif
- }
-
- /*
- * Check for supported memory module types.
- */
- if (spd1.mem_type != SPD_MEMTYPE_DDR
- && spd1.mem_type != SPD_MEMTYPE_DDR2) {
- no_dimm1 = 1;
- } else {
- debug("\nFound memory of type 0x%02lx ",spd1.mem_type );
- if (spd1.mem_type == SPD_MEMTYPE_DDR)
- debug("DDR I\n");
- else
- debug("DDR II\n");
- }
-
- if (spd2.mem_type != SPD_MEMTYPE_DDR &&
- spd2.mem_type != SPD_MEMTYPE_DDR2) {
- no_dimm2 = 1;
- } else {
- debug("\nFound memory of type 0x%02lx ",spd2.mem_type );
- if (spd2.mem_type == SPD_MEMTYPE_DDR)
- debug("DDR I\n");
- else
- debug("DDR II\n");
- }
-
-#ifdef CONFIG_DDR_INTERLEAVE
- if (no_dimm1) {
- printf("For interleaved operation memory modules need to be present in CS0 DIMM slots of both DDR controllers!\n");
- return 0;
- }
-#endif
-
- /*
- * Memory is not present in DIMM1 and DIMM2 - so do not enable DDRn
- */
- if (no_dimm1 && no_dimm2) {
- printf("No memory modules found for DDR controller %d!!\n", ddr_num);
- return 0;
- } else {
-
-#if defined(CONFIG_DDR_ECC)
- unsigned char config;
-#endif
- mem_type = no_dimm2 ? spd1.mem_type : spd2.mem_type;
-
- /*
- * Figure out the settings for the sdram_cfg register.
- * Build up the entire register in 'sdram_cfg' before
- * writing since the write into the register will
- * actually enable the memory controller; 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_type = (mem_type == SPD_MEMTYPE_DDR) ? 2 : 3;
- sdram_cfg_1 = (0
- | (1 << 31) /* Enable */
- | (1 << 30) /* Self refresh */
- | (sdram_type << 24) /* SDRAM type */
- );
-
- /*
- * sdram_cfg[3] = RD_EN - registered DIMM enable
- * A value of 0x26 indicates micron registered
- * DIMMS (micron.com)
- */
- mod_attr = no_dimm2 ? spd1.mod_attr : spd2.mod_attr;
- if (mem_type == SPD_MEMTYPE_DDR && mod_attr == 0x26) {
- sdram_cfg_1 |= 0x10000000; /* RD_EN */
- }
-
-#if defined(CONFIG_DDR_ECC)
-
- config = no_dimm2 ? spd1.config : spd2.config;
-
- /*
- * If the user wanted ECC (enabled via sdram_cfg[2])
- */
- if (config == 0x02) {
- ddr->err_disable = 0x00000000;
- asm volatile("sync;isync;");
- ddr->err_sbe = 0x00ff0000;
- ddr->err_int_en = 0x0000000d;
- sdram_cfg_1 |= 0x20000000; /* ECC_EN */
- }
-#endif
-
- /*
- * Set 1T or 2T timing based on 1 or 2 modules
- */
- {
- if (!(no_dimm1 || no_dimm2)) {
- /*
- * 2T timing,because both DIMMS are present.
- * Enable 2T timing by setting sdram_cfg[16].
- */
- sdram_cfg_1 |= 0x8000; /* 2T_EN */
- }
- }
-
- /*
- * 200 painful micro-seconds must elapse between
- * the DDR clock setup and the DDR config enable.
- */
- udelay(200);
-
- /*
- * Go!
- */
- ddr->sdram_cfg_1 = sdram_cfg_1;
-
- asm volatile("sync;isync");
- udelay(500);
-
- debug("DDR: sdram_cfg = 0x%08x\n", ddr->sdram_cfg_1);
-
-
-#if defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
- d_init = 1;
- debug("DDR: memory initializing\n");
-
- /*
- * Poll until memory is initialized.
- * 512 Meg at 400 might hit this 200 times or so.
- */
- while ((ddr->sdram_cfg_2 & (d_init << 4)) != 0) {
- udelay(1000);
- }
- debug("DDR: memory initialized\n\n");
-#endif
-
- debug("Enabled DDR Controller %d\n", ddr_num);
- return 1;
- }
-}
-
-
-long int
-spd_sdram(void)
-{
- int memsize_ddr1_dimm1 = 0;
- int memsize_ddr1_dimm2 = 0;
- int memsize_ddr1 = 0;
- unsigned int law_size_ddr1;
-#ifdef CONFIG_DDR_INTERLEAVE
- volatile immap_t *immap = (immap_t *)CFG_IMMR;
- volatile ccsr_ddr_t *ddr1 = &immap->im_ddr1;
-#endif
-
-#if (CONFIG_NUM_DDR_CONTROLLERS > 1)
- int memsize_ddr2_dimm1 = 0;
- int memsize_ddr2_dimm2 = 0;
- int memsize_ddr2 = 0;
- unsigned int law_size_ddr2;
-#endif
-
- unsigned int ddr1_enabled = 0;
- unsigned int ddr2_enabled = 0;
- int memsize_total = 0;
-
-#ifdef CONFIG_DDR_INTERLEAVE
- unsigned int law_size_interleaved;
- volatile ccsr_ddr_t *ddr2 = &immap->im_ddr2;
-
- memsize_ddr1_dimm1 = spd_init(SPD_EEPROM_ADDRESS1,
- 1, 1,
- (unsigned int)memsize_total * 1024*1024);
- memsize_total += memsize_ddr1_dimm1;
-
- memsize_ddr2_dimm1 = spd_init(SPD_EEPROM_ADDRESS3,
- 2, 1,
- (unsigned int)memsize_total * 1024*1024);
- memsize_total += memsize_ddr2_dimm1;
-
- if (memsize_ddr1_dimm1 != memsize_ddr2_dimm1) {
- if (memsize_ddr1_dimm1 < memsize_ddr2_dimm1)
- memsize_total -= memsize_ddr1_dimm1;
- else
- memsize_total -= memsize_ddr2_dimm1;
- debug("Total memory available for interleaving 0x%08lx\n",
- memsize_total * 1024 * 1024);
- debug("Adjusting CS0_BNDS to account for unequal DIMM sizes in interleaved memory\n");
- ddr1->cs0_bnds = ((memsize_total * 1024 * 1024) - 1) >> 24;
- ddr2->cs0_bnds = ((memsize_total * 1024 * 1024) - 1) >> 24;
- debug("DDR1: cs0_bnds = 0x%08x\n", ddr1->cs0_bnds);
- debug("DDR2: cs0_bnds = 0x%08x\n", ddr2->cs0_bnds);
- }
-
- ddr1_enabled = enable_ddr(1);
- ddr2_enabled = enable_ddr(2);
-
- /*
- * Both controllers need to be enabled for interleaving.
- */
- if (ddr1_enabled && ddr2_enabled) {
- law_size_interleaved = 19 + __ilog2(memsize_total);
-
- /*
- * Set up LAWBAR for DDR 1 space.
- */
-#ifdef CONFIG_FSL_LAW
- set_next_law(CFG_DDR_SDRAM_BASE, law_size_interleaved, LAW_TRGT_IF_DDR_INTRLV);
-#endif
- debug("Interleaved memory size is 0x%08lx\n", memsize_total);
-
-#if (CFG_PAGE_INTERLEAVING == 1)
- printf("Page ");
-#elif (CFG_BANK_INTERLEAVING == 1)
- printf("Bank ");
-#elif (CFG_SUPER_BANK_INTERLEAVING == 1)
- printf("Super-bank ");
-#else
- printf("Cache-line ");
-#endif
- printf("Interleaved");
- return memsize_total * 1024 * 1024;
- } else {
- printf("Interleaved memory not enabled - check CS0 DIMM slots for both controllers.\n");
- return 0;
- }
-
-#else
- /*
- * Call spd_sdram() routine to init ddr1 - pass I2c address,
- * controller number, dimm number, and starting address.
- */
- memsize_ddr1_dimm1 = spd_init(SPD_EEPROM_ADDRESS1,
- 1, 1,
- (unsigned int)memsize_total * 1024*1024);
- memsize_total += memsize_ddr1_dimm1;
-
-#if defined(SPD_EEPROM_ADDRESS2)
- memsize_ddr1_dimm2 = spd_init(SPD_EEPROM_ADDRESS2,
- 1, 2,
- (unsigned int)memsize_total * 1024*1024);
-#endif
- memsize_total += memsize_ddr1_dimm2;
-
- /*
- * Enable the DDR controller - pass ddr controller number.
- */
- ddr1_enabled = enable_ddr(1);
-
- /* Keep track of memory to be addressed by DDR1 */
- memsize_ddr1 = memsize_ddr1_dimm1 + memsize_ddr1_dimm2;
-
- /*
- * First supported LAW size is 16M, at LAWAR_SIZE_16M == 23. Fnord.
- */
- if (ddr1_enabled) {
- law_size_ddr1 = 19 + __ilog2(memsize_ddr1);
-
- /*
- * Set up LAWBAR for DDR 1 space.
- */
-#ifdef CONFIG_FSL_LAW
- set_next_law(CFG_DDR_SDRAM_BASE, law_size_ddr1, LAW_TRGT_IF_DDR_1);
-#endif
- }
-
-#if (CONFIG_NUM_DDR_CONTROLLERS > 1)
- memsize_ddr2_dimm1 = spd_init(SPD_EEPROM_ADDRESS3,
- 2, 1,
- (unsigned int)memsize_total * 1024*1024);
- memsize_total += memsize_ddr2_dimm1;
-
- memsize_ddr2_dimm2 = spd_init(SPD_EEPROM_ADDRESS4,
- 2, 2,
- (unsigned int)memsize_total * 1024*1024);
- memsize_total += memsize_ddr2_dimm2;
-
- ddr2_enabled = enable_ddr(2);
-
- /* Keep track of memory to be addressed by DDR2 */
- memsize_ddr2 = memsize_ddr2_dimm1 + memsize_ddr2_dimm2;
-
- if (ddr2_enabled) {
- law_size_ddr2 = 19 + __ilog2(memsize_ddr2);
-
- /*
- * Set up LAWBAR for DDR 2 space.
- */
-#ifdef CONFIG_FSL_LAW
- set_next_law(
- (ddr1_enabled ? (memsize_ddr1 * 1024 * 1024) : CFG_DDR_SDRAM_BASE),
- law_size_ddr2, LAW_TRGT_IF_DDR_2);
-#endif
- }
-
- debug("\nMemory size of DDR2 = 0x%08lx\n", memsize_ddr2);
-
-#endif /* CONFIG_NUM_DDR_CONTROLLERS > 1 */
-
- debug("\nMemory size of DDR1 = 0x%08lx\n", memsize_ddr1);
-
- /*
- * If neither DDR controller is enabled return 0.
- */
- if (!ddr1_enabled && !ddr2_enabled)
- return 0;
-
- printf("Non-interleaved");
- return memsize_total * 1024 * 1024;
-
-#endif /* CONFIG_DDR_INTERLEAVE */
-}
-
-
-#endif /* CONFIG_SPD_EEPROM */
-
-
-#if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
-
-/*
- * Initialize all of memory for ECC, then enable errors.
- */
-
-void
-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 *ddr1= &immap->im_ddr1;
-
- dma_init();
-
- for (*p = 0; p < (uint *)(8 * 1024); p++) {
- if (((unsigned int)p & 0x1f) == 0) {
- ppcDcbz((unsigned long) p);
- }
- *p = (unsigned int)CONFIG_MEM_INIT_VALUE;
- if (((unsigned int)p & 0x1c) == 0x1c) {
- ppcDcbf((unsigned long) p);
- }
- }
-
- 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);
- }
-
- /*
- * Enable errors for ECC.
- */
- debug("DMA DDR: err_disable = 0x%08x\n", ddr1->err_disable);
- ddr1->err_disable = 0x00000000;
- asm volatile("sync;isync");
- debug("DMA DDR: err_disable = 0x%08x\n", ddr1->err_disable);
-}
-
-#endif /* CONFIG_DDR_ECC && ! CONFIG_ECC_INIT_VIA_DDRCONTROLLER */
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