+++ /dev/null
-/*
- * cpu/ppc4xx/44x_spd_ddr.c
- * This SPD DDR detection code supports IBM/AMCC PPC44x cpu with a
- * DDR controller. Those are 440GP/GX/EP/GR.
- *
- * (C) Copyright 2001
- * Bill Hunter, Wave 7 Optics, williamhunter@attbi.com
- *
- * Based on code by:
- *
- * Kenneth Johansson ,Ericsson AB.
- * kenneth.johansson@etx.ericsson.se
- *
- * hacked up by bill hunter. fixed so we could run before
- * serial_init and console_init. previous version avoided this by
- * running out of cache memory during serial/console init, then running
- * this code later.
- *
- * (C) Copyright 2002
- * Jun Gu, Artesyn Technology, jung@artesyncp.com
- * Support for AMCC 440 based on OpenBIOS draminit.c from IBM.
- *
- * (C) Copyright 2005-2007
- * Stefan Roese, DENX Software Engineering, sr@denx.de.
- *
- * 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
- */
-
-/* define DEBUG for debugging output (obviously ;-)) */
-#if 0
-#define DEBUG
-#endif
-
-#include <common.h>
-#include <asm/processor.h>
-#include <i2c.h>
-#include <ppc4xx.h>
-#include <asm/mmu.h>
-
-#include "ecc.h"
-
-#if defined(CONFIG_SPD_EEPROM) && \
- (defined(CONFIG_440GP) || defined(CONFIG_440GX) || \
- defined(CONFIG_440EP) || defined(CONFIG_440GR))
-
-/*
- * Set default values
- */
-#ifndef CONFIG_SYS_I2C_SPEED
-#define CONFIG_SYS_I2C_SPEED 50000
-#endif
-
-#define ONE_BILLION 1000000000
-
-/*
- * Board-specific Platform code can reimplement spd_ddr_init_hang () if needed
- */
-void __spd_ddr_init_hang (void)
-{
- hang ();
-}
-void spd_ddr_init_hang (void) __attribute__((weak, alias("__spd_ddr_init_hang")));
-
-/*-----------------------------------------------------------------------------+
- | General Definition
- +-----------------------------------------------------------------------------*/
-#define DEFAULT_SPD_ADDR1 0x53
-#define DEFAULT_SPD_ADDR2 0x52
-#define MAXBANKS 4 /* at most 4 dimm banks */
-#define MAX_SPD_BYTES 256
-#define NUMHALFCYCLES 4
-#define NUMMEMTESTS 8
-#define NUMMEMWORDS 8
-#define MAXBXCR 4
-#define TRUE 1
-#define FALSE 0
-
-/*
- * This DDR2 setup code can dynamically setup the TLB entries for the DDR2 memory
- * region. Right now the cache should still be disabled in U-Boot because of the
- * EMAC driver, that need it's buffer descriptor to be located in non cached
- * memory.
- *
- * If at some time this restriction doesn't apply anymore, just define
- * CONFIG_4xx_DCACHE in the board config file and this code should setup
- * everything correctly.
- */
-#ifdef CONFIG_4xx_DCACHE
-#define MY_TLB_WORD2_I_ENABLE 0 /* enable caching on SDRAM */
-#else
-#define MY_TLB_WORD2_I_ENABLE TLB_WORD2_I_ENABLE /* disable caching on SDRAM */
-#endif
-
-/* bank_parms is used to sort the bank sizes by descending order */
-struct bank_param {
- unsigned long cr;
- unsigned long bank_size_bytes;
-};
-
-typedef struct bank_param BANKPARMS;
-
-#ifdef CONFIG_SYS_SIMULATE_SPD_EEPROM
-extern const unsigned char cfg_simulate_spd_eeprom[128];
-#endif
-
-static unsigned char spd_read(uchar chip, uint addr);
-static void get_spd_info(unsigned long *dimm_populated,
- unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks);
-static void check_mem_type(unsigned long *dimm_populated,
- unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks);
-static void check_volt_type(unsigned long *dimm_populated,
- unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks);
-static void program_cfg0(unsigned long *dimm_populated,
- unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks);
-static void program_cfg1(unsigned long *dimm_populated,
- unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks);
-static void program_rtr(unsigned long *dimm_populated,
- unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks);
-static void program_tr0(unsigned long *dimm_populated,
- unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks);
-static void program_tr1(void);
-
-static unsigned long program_bxcr(unsigned long *dimm_populated,
- unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks);
-
-/*
- * This function is reading data from the DIMM module EEPROM over the SPD bus
- * and uses that to program the sdram controller.
- *
- * This works on boards that has the same schematics that the AMCC walnut has.
- *
- * BUG: Don't handle ECC memory
- * BUG: A few values in the TR register is currently hardcoded
- */
-long int spd_sdram(void) {
- unsigned char iic0_dimm_addr[] = SPD_EEPROM_ADDRESS;
- unsigned long dimm_populated[sizeof(iic0_dimm_addr)];
- unsigned long total_size;
- unsigned long cfg0;
- unsigned long mcsts;
- unsigned long num_dimm_banks; /* on board dimm banks */
-
- num_dimm_banks = sizeof(iic0_dimm_addr);
-
- /*
- * Make sure I2C controller is initialized
- * before continuing.
- */
- i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
-
- /*
- * Read the SPD information using I2C interface. Check to see if the
- * DIMM slots are populated.
- */
- get_spd_info(dimm_populated, iic0_dimm_addr, num_dimm_banks);
-
- /*
- * Check the memory type for the dimms plugged.
- */
- check_mem_type(dimm_populated, iic0_dimm_addr, num_dimm_banks);
-
- /*
- * Check the voltage type for the dimms plugged.
- */
- check_volt_type(dimm_populated, iic0_dimm_addr, num_dimm_banks);
-
-#if defined(CONFIG_440GX) || defined(CONFIG_440EP) || defined(CONFIG_440GR)
- /*
- * Soft-reset SDRAM controller.
- */
- mtsdr(SDR0_SRST, SDR0_SRST_DMC);
- mtsdr(SDR0_SRST, 0x00000000);
-#endif
-
- /*
- * program 440GP SDRAM controller options (SDRAM0_CFG0)
- */
- program_cfg0(dimm_populated, iic0_dimm_addr, num_dimm_banks);
-
- /*
- * program 440GP SDRAM controller options (SDRAM0_CFG1)
- */
- program_cfg1(dimm_populated, iic0_dimm_addr, num_dimm_banks);
-
- /*
- * program SDRAM refresh register (SDRAM0_RTR)
- */
- program_rtr(dimm_populated, iic0_dimm_addr, num_dimm_banks);
-
- /*
- * program SDRAM Timing Register 0 (SDRAM0_TR0)
- */
- program_tr0(dimm_populated, iic0_dimm_addr, num_dimm_banks);
-
- /*
- * program the BxCR registers to find out total sdram installed
- */
- total_size = program_bxcr(dimm_populated, iic0_dimm_addr,
- num_dimm_banks);
-
-#ifdef CONFIG_PROG_SDRAM_TLB /* this define should eventually be removed */
- /* and program tlb entries for this size (dynamic) */
- program_tlb(0, 0, total_size, MY_TLB_WORD2_I_ENABLE);
-#endif
-
- /*
- * program SDRAM Clock Timing Register (SDRAM0_CLKTR)
- */
- mtsdram(SDRAM0_CLKTR, 0x40000000);
-
- /*
- * delay to ensure 200 usec has elapsed
- */
- udelay(400);
-
- /*
- * enable the memory controller
- */
- mfsdram(SDRAM0_CFG0, cfg0);
- mtsdram(SDRAM0_CFG0, cfg0 | SDRAM_CFG0_DCEN);
-
- /*
- * wait for SDRAM_CFG0_DC_EN to complete
- */
- while (1) {
- mfsdram(SDRAM0_MCSTS, mcsts);
- if ((mcsts & SDRAM_MCSTS_MRSC) != 0)
- break;
- }
-
- /*
- * program SDRAM Timing Register 1, adding some delays
- */
- program_tr1();
-
-#ifdef CONFIG_DDR_ECC
- /*
- * If ecc is enabled, initialize the parity bits.
- */
- ecc_init(CONFIG_SYS_SDRAM_BASE, total_size);
-#endif
-
- return total_size;
-}
-
-static unsigned char spd_read(uchar chip, uint addr)
-{
- unsigned char data[2];
-
-#ifdef CONFIG_SYS_SIMULATE_SPD_EEPROM
- if (chip == CONFIG_SYS_SIMULATE_SPD_EEPROM) {
- /*
- * Onboard spd eeprom requested -> simulate values
- */
- return cfg_simulate_spd_eeprom[addr];
- }
-#endif /* CONFIG_SYS_SIMULATE_SPD_EEPROM */
-
- if (i2c_probe(chip) == 0) {
- if (i2c_read(chip, addr, 1, data, 1) == 0) {
- return data[0];
- }
- }
-
- return 0;
-}
-
-static void get_spd_info(unsigned long *dimm_populated,
- unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks)
-{
- unsigned long dimm_num;
- unsigned long dimm_found;
- unsigned char num_of_bytes;
- unsigned char total_size;
-
- dimm_found = FALSE;
- for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
- num_of_bytes = 0;
- total_size = 0;
-
- num_of_bytes = spd_read(iic0_dimm_addr[dimm_num], 0);
- total_size = spd_read(iic0_dimm_addr[dimm_num], 1);
-
- if ((num_of_bytes != 0) && (total_size != 0)) {
- dimm_populated[dimm_num] = TRUE;
- dimm_found = TRUE;
- debug("DIMM slot %lu: populated\n", dimm_num);
- } else {
- dimm_populated[dimm_num] = FALSE;
- debug("DIMM slot %lu: Not populated\n", dimm_num);
- }
- }
-
- if (dimm_found == FALSE) {
- printf("ERROR - No memory installed. Install a DDR-SDRAM DIMM.\n\n");
- spd_ddr_init_hang ();
- }
-}
-
-static void check_mem_type(unsigned long *dimm_populated,
- unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks)
-{
- unsigned long dimm_num;
- unsigned char dimm_type;
-
- for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
- if (dimm_populated[dimm_num] == TRUE) {
- dimm_type = spd_read(iic0_dimm_addr[dimm_num], 2);
- switch (dimm_type) {
- case 7:
- debug("DIMM slot %lu: DDR SDRAM detected\n", dimm_num);
- break;
- default:
- printf("ERROR: Unsupported DIMM detected in slot %lu.\n",
- dimm_num);
- printf("Only DDR SDRAM DIMMs are supported.\n");
- printf("Replace the DIMM module with a supported DIMM.\n\n");
- spd_ddr_init_hang ();
- break;
- }
- }
- }
-}
-
-static void check_volt_type(unsigned long *dimm_populated,
- unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks)
-{
- unsigned long dimm_num;
- unsigned long voltage_type;
-
- for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
- if (dimm_populated[dimm_num] == TRUE) {
- voltage_type = spd_read(iic0_dimm_addr[dimm_num], 8);
- if (voltage_type != 0x04) {
- printf("ERROR: DIMM %lu with unsupported voltage level.\n",
- dimm_num);
- spd_ddr_init_hang ();
- } else {
- debug("DIMM %lu voltage level supported.\n", dimm_num);
- }
- break;
- }
- }
-}
-
-static void program_cfg0(unsigned long *dimm_populated,
- unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks)
-{
- unsigned long dimm_num;
- unsigned long cfg0;
- unsigned long ecc_enabled;
- unsigned char ecc;
- unsigned char attributes;
- unsigned long data_width;
- unsigned long dimm_32bit;
- unsigned long dimm_64bit;
-
- /*
- * get Memory Controller Options 0 data
- */
- mfsdram(SDRAM0_CFG0, cfg0);
-
- /*
- * clear bits
- */
- cfg0 &= ~(SDRAM_CFG0_DCEN | SDRAM_CFG0_MCHK_MASK |
- SDRAM_CFG0_RDEN | SDRAM_CFG0_PMUD |
- SDRAM_CFG0_DMWD_MASK |
- SDRAM_CFG0_UIOS_MASK | SDRAM_CFG0_PDP);
-
-
- /*
- * FIXME: assume the DDR SDRAMs in both banks are the same
- */
- ecc_enabled = TRUE;
- for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
- if (dimm_populated[dimm_num] == TRUE) {
- ecc = spd_read(iic0_dimm_addr[dimm_num], 11);
- if (ecc != 0x02) {
- ecc_enabled = FALSE;
- }
-
- /*
- * program Registered DIMM Enable
- */
- attributes = spd_read(iic0_dimm_addr[dimm_num], 21);
- if ((attributes & 0x02) != 0x00) {
- cfg0 |= SDRAM_CFG0_RDEN;
- }
-
- /*
- * program DDR SDRAM Data Width
- */
- data_width =
- (unsigned long)spd_read(iic0_dimm_addr[dimm_num],6) +
- (((unsigned long)spd_read(iic0_dimm_addr[dimm_num],7)) << 8);
- if (data_width == 64 || data_width == 72) {
- dimm_64bit = TRUE;
- cfg0 |= SDRAM_CFG0_DMWD_64;
- } else if (data_width == 32 || data_width == 40) {
- dimm_32bit = TRUE;
- cfg0 |= SDRAM_CFG0_DMWD_32;
- } else {
- printf("WARNING: DIMM with datawidth of %lu bits.\n",
- data_width);
- printf("Only DIMMs with 32 or 64 bit datawidths supported.\n");
- spd_ddr_init_hang ();
- }
- break;
- }
- }
-
- /*
- * program Memory Data Error Checking
- */
- if (ecc_enabled == TRUE) {
- cfg0 |= SDRAM_CFG0_MCHK_GEN;
- } else {
- cfg0 |= SDRAM_CFG0_MCHK_NON;
- }
-
- /*
- * program Page Management Unit (0 == enabled)
- */
- cfg0 &= ~SDRAM_CFG0_PMUD;
-
- /*
- * program Memory Controller Options 0
- * Note: DCEN must be enabled after all DDR SDRAM controller
- * configuration registers get initialized.
- */
- mtsdram(SDRAM0_CFG0, cfg0);
-}
-
-static void program_cfg1(unsigned long *dimm_populated,
- unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks)
-{
- unsigned long cfg1;
- mfsdram(SDRAM0_CFG1, cfg1);
-
- /*
- * Self-refresh exit, disable PM
- */
- cfg1 &= ~(SDRAM_CFG1_SRE | SDRAM_CFG1_PMEN);
-
- /*
- * program Memory Controller Options 1
- */
- mtsdram(SDRAM0_CFG1, cfg1);
-}
-
-static void program_rtr(unsigned long *dimm_populated,
- unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks)
-{
- unsigned long dimm_num;
- unsigned long bus_period_x_10;
- unsigned long refresh_rate = 0;
- unsigned char refresh_rate_type;
- unsigned long refresh_interval;
- unsigned long sdram_rtr;
- PPC4xx_SYS_INFO sys_info;
-
- /*
- * get the board info
- */
- get_sys_info(&sys_info);
- bus_period_x_10 = ONE_BILLION / (sys_info.freqPLB / 10);
-
- for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
- if (dimm_populated[dimm_num] == TRUE) {
- refresh_rate_type = 0x7F & spd_read(iic0_dimm_addr[dimm_num], 12);
- switch (refresh_rate_type) {
- case 0x00:
- refresh_rate = 15625;
- break;
- case 0x01:
- refresh_rate = 15625/4;
- break;
- case 0x02:
- refresh_rate = 15625/2;
- break;
- case 0x03:
- refresh_rate = 15626*2;
- break;
- case 0x04:
- refresh_rate = 15625*4;
- break;
- case 0x05:
- refresh_rate = 15625*8;
- break;
- default:
- printf("ERROR: DIMM %lu, unsupported refresh rate/type.\n",
- dimm_num);
- printf("Replace the DIMM module with a supported DIMM.\n");
- break;
- }
-
- break;
- }
- }
-
- refresh_interval = refresh_rate * 10 / bus_period_x_10;
- sdram_rtr = (refresh_interval & 0x3ff8) << 16;
-
- /*
- * program Refresh Timer Register (SDRAM0_RTR)
- */
- mtsdram(SDRAM0_RTR, sdram_rtr);
-}
-
-static void program_tr0(unsigned long *dimm_populated,
- unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks)
-{
- unsigned long dimm_num;
- unsigned long tr0;
- unsigned char wcsbc;
- unsigned char t_rp_ns;
- unsigned char t_rcd_ns;
- unsigned char t_ras_ns;
- unsigned long t_rp_clk;
- unsigned long t_ras_rcd_clk;
- unsigned long t_rcd_clk;
- unsigned long t_rfc_clk;
- unsigned long plb_check;
- unsigned char cas_bit;
- unsigned long cas_index;
- unsigned char cas_2_0_available;
- unsigned char cas_2_5_available;
- unsigned char cas_3_0_available;
- unsigned long cycle_time_ns_x_10[3];
- unsigned long tcyc_3_0_ns_x_10;
- unsigned long tcyc_2_5_ns_x_10;
- unsigned long tcyc_2_0_ns_x_10;
- unsigned long tcyc_reg;
- unsigned long bus_period_x_10;
- PPC4xx_SYS_INFO sys_info;
- unsigned long residue;
-
- /*
- * get the board info
- */
- get_sys_info(&sys_info);
- bus_period_x_10 = ONE_BILLION / (sys_info.freqPLB / 10);
-
- /*
- * get SDRAM Timing Register 0 (SDRAM_TR0) and clear bits
- */
- mfsdram(SDRAM0_TR0, tr0);
- tr0 &= ~(SDRAM_TR0_SDWR_MASK | SDRAM_TR0_SDWD_MASK |
- SDRAM_TR0_SDCL_MASK | SDRAM_TR0_SDPA_MASK |
- SDRAM_TR0_SDCP_MASK | SDRAM_TR0_SDLD_MASK |
- SDRAM_TR0_SDRA_MASK | SDRAM_TR0_SDRD_MASK);
-
- /*
- * initialization
- */
- wcsbc = 0;
- t_rp_ns = 0;
- t_rcd_ns = 0;
- t_ras_ns = 0;
- cas_2_0_available = TRUE;
- cas_2_5_available = TRUE;
- cas_3_0_available = TRUE;
- tcyc_2_0_ns_x_10 = 0;
- tcyc_2_5_ns_x_10 = 0;
- tcyc_3_0_ns_x_10 = 0;
-
- for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
- if (dimm_populated[dimm_num] == TRUE) {
- wcsbc = spd_read(iic0_dimm_addr[dimm_num], 15);
- t_rp_ns = spd_read(iic0_dimm_addr[dimm_num], 27) >> 2;
- t_rcd_ns = spd_read(iic0_dimm_addr[dimm_num], 29) >> 2;
- t_ras_ns = spd_read(iic0_dimm_addr[dimm_num], 30);
- cas_bit = spd_read(iic0_dimm_addr[dimm_num], 18);
-
- for (cas_index = 0; cas_index < 3; cas_index++) {
- switch (cas_index) {
- case 0:
- tcyc_reg = spd_read(iic0_dimm_addr[dimm_num], 9);
- break;
- case 1:
- tcyc_reg = spd_read(iic0_dimm_addr[dimm_num], 23);
- break;
- default:
- tcyc_reg = spd_read(iic0_dimm_addr[dimm_num], 25);
- break;
- }
-
- if ((tcyc_reg & 0x0F) >= 10) {
- printf("ERROR: Tcyc incorrect for DIMM in slot %lu\n",
- dimm_num);
- spd_ddr_init_hang ();
- }
-
- cycle_time_ns_x_10[cas_index] =
- (((tcyc_reg & 0xF0) >> 4) * 10) + (tcyc_reg & 0x0F);
- }
-
- cas_index = 0;
-
- if ((cas_bit & 0x80) != 0) {
- cas_index += 3;
- } else if ((cas_bit & 0x40) != 0) {
- cas_index += 2;
- } else if ((cas_bit & 0x20) != 0) {
- cas_index += 1;
- }
-
- if (((cas_bit & 0x10) != 0) && (cas_index < 3)) {
- tcyc_3_0_ns_x_10 = cycle_time_ns_x_10[cas_index];
- cas_index++;
- } else {
- if (cas_index != 0) {
- cas_index++;
- }
- cas_3_0_available = FALSE;
- }
-
- if (((cas_bit & 0x08) != 0) || (cas_index < 3)) {
- tcyc_2_5_ns_x_10 = cycle_time_ns_x_10[cas_index];
- cas_index++;
- } else {
- if (cas_index != 0) {
- cas_index++;
- }
- cas_2_5_available = FALSE;
- }
-
- if (((cas_bit & 0x04) != 0) || (cas_index < 3)) {
- tcyc_2_0_ns_x_10 = cycle_time_ns_x_10[cas_index];
- cas_index++;
- } else {
- if (cas_index != 0) {
- cas_index++;
- }
- cas_2_0_available = FALSE;
- }
-
- break;
- }
- }
-
- /*
- * Program SD_WR and SD_WCSBC fields
- */
- tr0 |= SDRAM_TR0_SDWR_2_CLK; /* Write Recovery: 2 CLK */
- switch (wcsbc) {
- case 0:
- tr0 |= SDRAM_TR0_SDWD_0_CLK;
- break;
- default:
- tr0 |= SDRAM_TR0_SDWD_1_CLK;
- break;
- }
-
- /*
- * Program SD_CASL field
- */
- if ((cas_2_0_available == TRUE) &&
- (bus_period_x_10 >= tcyc_2_0_ns_x_10)) {
- tr0 |= SDRAM_TR0_SDCL_2_0_CLK;
- } else if ((cas_2_5_available == TRUE) &&
- (bus_period_x_10 >= tcyc_2_5_ns_x_10)) {
- tr0 |= SDRAM_TR0_SDCL_2_5_CLK;
- } else if ((cas_3_0_available == TRUE) &&
- (bus_period_x_10 >= tcyc_3_0_ns_x_10)) {
- tr0 |= SDRAM_TR0_SDCL_3_0_CLK;
- } else {
- printf("ERROR: No supported CAS latency with the installed DIMMs.\n");
- printf("Only CAS latencies of 2.0, 2.5, and 3.0 are supported.\n");
- printf("Make sure the PLB speed is within the supported range.\n");
- spd_ddr_init_hang ();
- }
-
- /*
- * Calculate Trp in clock cycles and round up if necessary
- * Program SD_PTA field
- */
- t_rp_clk = sys_info.freqPLB * t_rp_ns / ONE_BILLION;
- plb_check = ONE_BILLION * t_rp_clk / t_rp_ns;
- if (sys_info.freqPLB != plb_check) {
- t_rp_clk++;
- }
- switch ((unsigned long)t_rp_clk) {
- case 0:
- case 1:
- case 2:
- tr0 |= SDRAM_TR0_SDPA_2_CLK;
- break;
- case 3:
- tr0 |= SDRAM_TR0_SDPA_3_CLK;
- break;
- default:
- tr0 |= SDRAM_TR0_SDPA_4_CLK;
- break;
- }
-
- /*
- * Program SD_CTP field
- */
- t_ras_rcd_clk = sys_info.freqPLB * (t_ras_ns - t_rcd_ns) / ONE_BILLION;
- plb_check = ONE_BILLION * t_ras_rcd_clk / (t_ras_ns - t_rcd_ns);
- if (sys_info.freqPLB != plb_check) {
- t_ras_rcd_clk++;
- }
- switch (t_ras_rcd_clk) {
- case 0:
- case 1:
- case 2:
- tr0 |= SDRAM_TR0_SDCP_2_CLK;
- break;
- case 3:
- tr0 |= SDRAM_TR0_SDCP_3_CLK;
- break;
- case 4:
- tr0 |= SDRAM_TR0_SDCP_4_CLK;
- break;
- default:
- tr0 |= SDRAM_TR0_SDCP_5_CLK;
- break;
- }
-
- /*
- * Program SD_LDF field
- */
- tr0 |= SDRAM_TR0_SDLD_2_CLK;
-
- /*
- * Program SD_RFTA field
- * FIXME tRFC hardcoded as 75 nanoseconds
- */
- t_rfc_clk = sys_info.freqPLB / (ONE_BILLION / 75);
- residue = sys_info.freqPLB % (ONE_BILLION / 75);
- if (residue >= (ONE_BILLION / 150)) {
- t_rfc_clk++;
- }
- switch (t_rfc_clk) {
- case 0:
- case 1:
- case 2:
- case 3:
- case 4:
- case 5:
- case 6:
- tr0 |= SDRAM_TR0_SDRA_6_CLK;
- break;
- case 7:
- tr0 |= SDRAM_TR0_SDRA_7_CLK;
- break;
- case 8:
- tr0 |= SDRAM_TR0_SDRA_8_CLK;
- break;
- case 9:
- tr0 |= SDRAM_TR0_SDRA_9_CLK;
- break;
- case 10:
- tr0 |= SDRAM_TR0_SDRA_10_CLK;
- break;
- case 11:
- tr0 |= SDRAM_TR0_SDRA_11_CLK;
- break;
- case 12:
- tr0 |= SDRAM_TR0_SDRA_12_CLK;
- break;
- default:
- tr0 |= SDRAM_TR0_SDRA_13_CLK;
- break;
- }
-
- /*
- * Program SD_RCD field
- */
- t_rcd_clk = sys_info.freqPLB * t_rcd_ns / ONE_BILLION;
- plb_check = ONE_BILLION * t_rcd_clk / t_rcd_ns;
- if (sys_info.freqPLB != plb_check) {
- t_rcd_clk++;
- }
- switch (t_rcd_clk) {
- case 0:
- case 1:
- case 2:
- tr0 |= SDRAM_TR0_SDRD_2_CLK;
- break;
- case 3:
- tr0 |= SDRAM_TR0_SDRD_3_CLK;
- break;
- default:
- tr0 |= SDRAM_TR0_SDRD_4_CLK;
- break;
- }
-
- debug("tr0: %x\n", tr0);
- mtsdram(SDRAM0_TR0, tr0);
-}
-
-static int short_mem_test(void)
-{
- unsigned long i, j;
- unsigned long bxcr_num;
- unsigned long *membase;
- const unsigned long test[NUMMEMTESTS][NUMMEMWORDS] = {
- {0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF,
- 0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF},
- {0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000,
- 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000},
- {0xAAAAAAAA, 0xAAAAAAAA, 0x55555555, 0x55555555,
- 0xAAAAAAAA, 0xAAAAAAAA, 0x55555555, 0x55555555},
- {0x55555555, 0x55555555, 0xAAAAAAAA, 0xAAAAAAAA,
- 0x55555555, 0x55555555, 0xAAAAAAAA, 0xAAAAAAAA},
- {0xA5A5A5A5, 0xA5A5A5A5, 0x5A5A5A5A, 0x5A5A5A5A,
- 0xA5A5A5A5, 0xA5A5A5A5, 0x5A5A5A5A, 0x5A5A5A5A},
- {0x5A5A5A5A, 0x5A5A5A5A, 0xA5A5A5A5, 0xA5A5A5A5,
- 0x5A5A5A5A, 0x5A5A5A5A, 0xA5A5A5A5, 0xA5A5A5A5},
- {0xAA55AA55, 0xAA55AA55, 0x55AA55AA, 0x55AA55AA,
- 0xAA55AA55, 0xAA55AA55, 0x55AA55AA, 0x55AA55AA},
- {0x55AA55AA, 0x55AA55AA, 0xAA55AA55, 0xAA55AA55,
- 0x55AA55AA, 0x55AA55AA, 0xAA55AA55, 0xAA55AA55}};
-
- for (bxcr_num = 0; bxcr_num < MAXBXCR; bxcr_num++) {
- mtdcr(SDRAM0_CFGADDR, SDRAM0_B0CR + (bxcr_num << 2));
- if ((mfdcr(SDRAM0_CFGDATA) & SDRAM_BXCR_SDBE) == SDRAM_BXCR_SDBE) {
- /* Bank is enabled */
- membase = (unsigned long*)
- (mfdcr(SDRAM0_CFGDATA) & SDRAM_BXCR_SDBA_MASK);
-
- /*
- * Run the short memory test
- */
- for (i = 0; i < NUMMEMTESTS; i++) {
- for (j = 0; j < NUMMEMWORDS; j++) {
- /* printf("bank enabled base:%x\n", &membase[j]); */
- membase[j] = test[i][j];
- ppcDcbf((unsigned long)&(membase[j]));
- }
-
- for (j = 0; j < NUMMEMWORDS; j++) {
- if (membase[j] != test[i][j]) {
- ppcDcbf((unsigned long)&(membase[j]));
- return 0;
- }
- ppcDcbf((unsigned long)&(membase[j]));
- }
-
- if (j < NUMMEMWORDS)
- return 0;
- }
-
- /*
- * see if the rdclt value passed
- */
- if (i < NUMMEMTESTS)
- return 0;
- }
- }
-
- return 1;
-}
-
-static void program_tr1(void)
-{
- unsigned long tr0;
- unsigned long tr1;
- unsigned long cfg0;
- unsigned long ecc_temp;
- unsigned long dlycal;
- unsigned long dly_val;
- unsigned long k;
- unsigned long max_pass_length;
- unsigned long current_pass_length;
- unsigned long current_fail_length;
- unsigned long current_start;
- unsigned long rdclt;
- unsigned long rdclt_offset;
- long max_start;
- long max_end;
- long rdclt_average;
- unsigned char window_found;
- unsigned char fail_found;
- unsigned char pass_found;
- PPC4xx_SYS_INFO sys_info;
-
- /*
- * get the board info
- */
- get_sys_info(&sys_info);
-
- /*
- * get SDRAM Timing Register 0 (SDRAM_TR0) and clear bits
- */
- mfsdram(SDRAM0_TR1, tr1);
- tr1 &= ~(SDRAM_TR1_RDSS_MASK | SDRAM_TR1_RDSL_MASK |
- SDRAM_TR1_RDCD_MASK | SDRAM_TR1_RDCT_MASK);
-
- mfsdram(SDRAM0_TR0, tr0);
- if (((tr0 & SDRAM_TR0_SDCL_MASK) == SDRAM_TR0_SDCL_2_5_CLK) &&
- (sys_info.freqPLB > 100000000)) {
- tr1 |= SDRAM_TR1_RDSS_TR2;
- tr1 |= SDRAM_TR1_RDSL_STAGE3;
- tr1 |= SDRAM_TR1_RDCD_RCD_1_2;
- } else {
- tr1 |= SDRAM_TR1_RDSS_TR1;
- tr1 |= SDRAM_TR1_RDSL_STAGE2;
- tr1 |= SDRAM_TR1_RDCD_RCD_0_0;
- }
-
- /*
- * save CFG0 ECC setting to a temporary variable and turn ECC off
- */
- mfsdram(SDRAM0_CFG0, cfg0);
- ecc_temp = cfg0 & SDRAM_CFG0_MCHK_MASK;
- mtsdram(SDRAM0_CFG0, (cfg0 & ~SDRAM_CFG0_MCHK_MASK) | SDRAM_CFG0_MCHK_NON);
-
- /*
- * get the delay line calibration register value
- */
- mfsdram(SDRAM0_DLYCAL, dlycal);
- dly_val = SDRAM_DLYCAL_DLCV_DECODE(dlycal) << 2;
-
- max_pass_length = 0;
- max_start = 0;
- max_end = 0;
- current_pass_length = 0;
- current_fail_length = 0;
- current_start = 0;
- rdclt_offset = 0;
- window_found = FALSE;
- fail_found = FALSE;
- pass_found = FALSE;
- debug("Starting memory test ");
-
- for (k = 0; k < NUMHALFCYCLES; k++) {
- for (rdclt = 0; rdclt < dly_val; rdclt++) {
- /*
- * Set the timing reg for the test.
- */
- mtsdram(SDRAM0_TR1, (tr1 | SDRAM_TR1_RDCT_ENCODE(rdclt)));
-
- if (short_mem_test()) {
- if (fail_found == TRUE) {
- pass_found = TRUE;
- if (current_pass_length == 0) {
- current_start = rdclt_offset + rdclt;
- }
-
- current_fail_length = 0;
- current_pass_length++;
-
- if (current_pass_length > max_pass_length) {
- max_pass_length = current_pass_length;
- max_start = current_start;
- max_end = rdclt_offset + rdclt;
- }
- }
- } else {
- current_pass_length = 0;
- current_fail_length++;
-
- if (current_fail_length >= (dly_val>>2)) {
- if (fail_found == FALSE) {
- fail_found = TRUE;
- } else if (pass_found == TRUE) {
- window_found = TRUE;
- break;
- }
- }
- }
- }
- debug(".");
-
- if (window_found == TRUE) {
- break;
- }
-
- tr1 = tr1 ^ SDRAM_TR1_RDCD_MASK;
- rdclt_offset += dly_val;
- }
- debug("\n");
-
- /*
- * make sure we find the window
- */
- if (window_found == FALSE) {
- printf("ERROR: Cannot determine a common read delay.\n");
- spd_ddr_init_hang ();
- }
-
- /*
- * restore the orignal ECC setting
- */
- mtsdram(SDRAM0_CFG0, (cfg0 & ~SDRAM_CFG0_MCHK_MASK) | ecc_temp);
-
- /*
- * set the SDRAM TR1 RDCD value
- */
- tr1 &= ~SDRAM_TR1_RDCD_MASK;
- if ((tr0 & SDRAM_TR0_SDCL_MASK) == SDRAM_TR0_SDCL_2_5_CLK) {
- tr1 |= SDRAM_TR1_RDCD_RCD_1_2;
- } else {
- tr1 |= SDRAM_TR1_RDCD_RCD_0_0;
- }
-
- /*
- * set the SDRAM TR1 RDCLT value
- */
- tr1 &= ~SDRAM_TR1_RDCT_MASK;
- while (max_end >= (dly_val << 1)) {
- max_end -= (dly_val << 1);
- max_start -= (dly_val << 1);
- }
-
- rdclt_average = ((max_start + max_end) >> 1);
-
- if (rdclt_average < 0) {
- rdclt_average = 0;
- }
-
- if (rdclt_average >= dly_val) {
- rdclt_average -= dly_val;
- tr1 = tr1 ^ SDRAM_TR1_RDCD_MASK;
- }
- tr1 |= SDRAM_TR1_RDCT_ENCODE(rdclt_average);
-
- debug("tr1: %x\n", tr1);
-
- /*
- * program SDRAM Timing Register 1 TR1
- */
- mtsdram(SDRAM0_TR1, tr1);
-}
-
-static unsigned long program_bxcr(unsigned long *dimm_populated,
- unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks)
-{
- unsigned long dimm_num;
- unsigned long bank_base_addr;
- unsigned long cr;
- unsigned long i;
- unsigned long j;
- unsigned long temp;
- unsigned char num_row_addr;
- unsigned char num_col_addr;
- unsigned char num_banks;
- unsigned char bank_size_id;
- unsigned long ctrl_bank_num[MAXBANKS];
- unsigned long bx_cr_num;
- unsigned long largest_size_index;
- unsigned long largest_size;
- unsigned long current_size_index;
- BANKPARMS bank_parms[MAXBXCR];
- unsigned long sorted_bank_num[MAXBXCR]; /* DDR Controller bank number table (sorted by size) */
- unsigned long sorted_bank_size[MAXBXCR]; /* DDR Controller bank size table (sorted by size)*/
-
- /*
- * Set the BxCR regs. First, wipe out the bank config registers.
- */
- for (bx_cr_num = 0; bx_cr_num < MAXBXCR; bx_cr_num++) {
- mtdcr(SDRAM0_CFGADDR, SDRAM0_B0CR + (bx_cr_num << 2));
- mtdcr(SDRAM0_CFGDATA, 0x00000000);
- bank_parms[bx_cr_num].bank_size_bytes = 0;
- }
-
-#ifdef CONFIG_BAMBOO
- /*
- * This next section is hardware dependent and must be programmed
- * to match the hardware. For bamboo, the following holds...
- * 1. SDRAM0_B0CR: Bank 0 of dimm 0 ctrl_bank_num : 0 (soldered onboard)
- * 2. SDRAM0_B1CR: Bank 0 of dimm 1 ctrl_bank_num : 1
- * 3. SDRAM0_B2CR: Bank 1 of dimm 1 ctrl_bank_num : 1
- * 4. SDRAM0_B3CR: Bank 0 of dimm 2 ctrl_bank_num : 3
- * ctrl_bank_num corresponds to the first usable DDR controller bank number by DIMM
- */
- ctrl_bank_num[0] = 0;
- ctrl_bank_num[1] = 1;
- ctrl_bank_num[2] = 3;
-#else
- /*
- * Ocotea, Ebony and the other IBM/AMCC eval boards have
- * 2 DIMM slots with each max 2 banks
- */
- ctrl_bank_num[0] = 0;
- ctrl_bank_num[1] = 2;
-#endif
-
- /*
- * reset the bank_base address
- */
- bank_base_addr = CONFIG_SYS_SDRAM_BASE;
-
- for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
- if (dimm_populated[dimm_num] == TRUE) {
- num_row_addr = spd_read(iic0_dimm_addr[dimm_num], 3);
- num_col_addr = spd_read(iic0_dimm_addr[dimm_num], 4);
- num_banks = spd_read(iic0_dimm_addr[dimm_num], 5);
- bank_size_id = spd_read(iic0_dimm_addr[dimm_num], 31);
- debug("DIMM%d: row=%d col=%d banks=%d\n", dimm_num,
- num_row_addr, num_col_addr, num_banks);
-
- /*
- * Set the SDRAM0_BxCR regs
- */
- cr = 0;
- switch (bank_size_id) {
- case 0x02:
- cr |= SDRAM_BXCR_SDSZ_8;
- break;
- case 0x04:
- cr |= SDRAM_BXCR_SDSZ_16;
- break;
- case 0x08:
- cr |= SDRAM_BXCR_SDSZ_32;
- break;
- case 0x10:
- cr |= SDRAM_BXCR_SDSZ_64;
- break;
- case 0x20:
- cr |= SDRAM_BXCR_SDSZ_128;
- break;
- case 0x40:
- cr |= SDRAM_BXCR_SDSZ_256;
- break;
- case 0x80:
- cr |= SDRAM_BXCR_SDSZ_512;
- break;
- default:
- printf("DDR-SDRAM: DIMM %lu BxCR configuration.\n",
- dimm_num);
- printf("ERROR: Unsupported value for the banksize: %d.\n",
- bank_size_id);
- printf("Replace the DIMM module with a supported DIMM.\n\n");
- spd_ddr_init_hang ();
- }
-
- switch (num_col_addr) {
- case 0x08:
- cr |= SDRAM_BXCR_SDAM_1;
- break;
- case 0x09:
- cr |= SDRAM_BXCR_SDAM_2;
- break;
- case 0x0A:
- cr |= SDRAM_BXCR_SDAM_3;
- break;
- case 0x0B:
- cr |= SDRAM_BXCR_SDAM_4;
- break;
- default:
- printf("DDR-SDRAM: DIMM %lu BxCR configuration.\n",
- dimm_num);
- printf("ERROR: Unsupported value for number of "
- "column addresses: %d.\n", num_col_addr);
- printf("Replace the DIMM module with a supported DIMM.\n\n");
- spd_ddr_init_hang ();
- }
-
- /*
- * enable the bank
- */
- cr |= SDRAM_BXCR_SDBE;
-
- for (i = 0; i < num_banks; i++) {
- bank_parms[ctrl_bank_num[dimm_num]+i].bank_size_bytes =
- (4 << 20) * bank_size_id;
- bank_parms[ctrl_bank_num[dimm_num]+i].cr = cr;
- debug("DIMM%d-bank %d (SDRAM0_B%dCR): bank_size_bytes=%d\n",
- dimm_num, i, ctrl_bank_num[dimm_num]+i,
- bank_parms[ctrl_bank_num[dimm_num]+i].bank_size_bytes);
- }
- }
- }
-
- /* Initialize sort tables */
- for (i = 0; i < MAXBXCR; i++) {
- sorted_bank_num[i] = i;
- sorted_bank_size[i] = bank_parms[i].bank_size_bytes;
- }
-
- for (i = 0; i < MAXBXCR-1; i++) {
- largest_size = sorted_bank_size[i];
- largest_size_index = 255;
-
- /* Find the largest remaining value */
- for (j = i + 1; j < MAXBXCR; j++) {
- if (sorted_bank_size[j] > largest_size) {
- /* Save largest remaining value and its index */
- largest_size = sorted_bank_size[j];
- largest_size_index = j;
- }
- }
-
- if (largest_size_index != 255) {
- /* Swap the current and largest values */
- current_size_index = sorted_bank_num[largest_size_index];
- sorted_bank_size[largest_size_index] = sorted_bank_size[i];
- sorted_bank_size[i] = largest_size;
- sorted_bank_num[largest_size_index] = sorted_bank_num[i];
- sorted_bank_num[i] = current_size_index;
- }
- }
-
- /* Set the SDRAM0_BxCR regs thanks to sort tables */
- for (bx_cr_num = 0, bank_base_addr = 0; bx_cr_num < MAXBXCR; bx_cr_num++) {
- if (bank_parms[sorted_bank_num[bx_cr_num]].bank_size_bytes) {
- mtdcr(SDRAM0_CFGADDR, SDRAM0_B0CR + (sorted_bank_num[bx_cr_num] << 2));
- temp = mfdcr(SDRAM0_CFGDATA) & ~(SDRAM_BXCR_SDBA_MASK | SDRAM_BXCR_SDSZ_MASK |
- SDRAM_BXCR_SDAM_MASK | SDRAM_BXCR_SDBE);
- temp = temp | (bank_base_addr & SDRAM_BXCR_SDBA_MASK) |
- bank_parms[sorted_bank_num[bx_cr_num]].cr;
- mtdcr(SDRAM0_CFGDATA, temp);
- bank_base_addr += bank_parms[sorted_bank_num[bx_cr_num]].bank_size_bytes;
- debug("SDRAM0_B%dCR=0x%08lx\n", sorted_bank_num[bx_cr_num], temp);
- }
- }
-
- return(bank_base_addr);
-}
-#endif /* CONFIG_SPD_EEPROM */
projects / u-boot / blobdiff