#endif
#include <common.h>
+#include <command.h>
#include <ppc4xx.h>
#include <i2c.h>
#include <asm/io.h>
#if defined(CONFIG_SPD_EEPROM) && \
(defined(CONFIG_440SP) || defined(CONFIG_440SPE))
+/*-----------------------------------------------------------------------------+
+ * Defines
+ *-----------------------------------------------------------------------------*/
#ifndef TRUE
#define TRUE 1
#endif
#define MULDIV64(m1, m2, d) (u32)(((u64)(m1) * (u64)(m2)) / (u64)(d))
-#if defined(DEBUG)
-static void ppc440sp_sdram_register_dump(void);
-#endif
+#define CMD_NOP (7 << 19)
+#define CMD_PRECHARGE (2 << 19)
+#define CMD_REFRESH (1 << 19)
+#define CMD_EMR (0 << 19)
+#define CMD_READ (5 << 19)
+#define CMD_WRITE (4 << 19)
+
+#define SELECT_MR (0 << 16)
+#define SELECT_EMR (1 << 16)
+#define SELECT_EMR2 (2 << 16)
+#define SELECT_EMR3 (3 << 16)
+
+/* MR */
+#define DLL_RESET 0x00000100
+
+#define WRITE_RECOV_2 (1 << 9)
+#define WRITE_RECOV_3 (2 << 9)
+#define WRITE_RECOV_4 (3 << 9)
+#define WRITE_RECOV_5 (4 << 9)
+#define WRITE_RECOV_6 (5 << 9)
+
+#define BURST_LEN_4 0x00000002
+
+/* EMR */
+#define ODT_0_OHM 0x00000000
+#define ODT_50_OHM 0x00000044
+#define ODT_75_OHM 0x00000004
+#define ODT_150_OHM 0x00000040
+
+#define ODS_FULL 0x00000000
+#define ODS_REDUCED 0x00000002
+
+/* defines for ODT (On Die Termination) of the 440SP(e) DDR2 controller */
+#define ODT_EB0R (0x80000000 >> 8)
+#define ODT_EB0W (0x80000000 >> 7)
+#define CALC_ODT_R(n) (ODT_EB0R << (n << 1))
+#define CALC_ODT_W(n) (ODT_EB0W << (n << 1))
+#define CALC_ODT_RW(n) (CALC_ODT_R(n) | CALC_ODT_W(n))
-/*-----------------------------------------------------------------------------+
- * Defines
- *-----------------------------------------------------------------------------*/
/* Defines for the Read Cycle Delay test */
#define NUMMEMTESTS 8
#define NUMMEMWORDS 8
+#define CONFIG_ECC_ERROR_RESET /* test-only: see description below, at check_ecc() */
+
+/*
+ * 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
+ * CFG_ENABLE_SDRAM_CACHE in the board config file and this code should setup
+ * everything correctly.
+ */
+#ifdef CFG_ENABLE_SDRAM_CACHE
+#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
+
/* Private Structure Definitions */
/* enum only to ease code for cas latency setting */
* Prototypes
*-----------------------------------------------------------------------------*/
static unsigned long sdram_memsize(void);
-void program_tlb(u32 start, u32 size);
+void program_tlb(u32 start, u32 size, u32 tlb_word2_i_value);
static void get_spd_info(unsigned long *dimm_populated,
unsigned char *iic0_dimm_addr,
unsigned long num_dimm_banks);
static void program_mode(unsigned long *dimm_populated,
unsigned char *iic0_dimm_addr,
unsigned long num_dimm_banks,
- ddr_cas_id_t *selected_cas);
+ ddr_cas_id_t *selected_cas,
+ int *write_recovery);
static void program_tr(unsigned long *dimm_populated,
unsigned char *iic0_dimm_addr,
unsigned long num_dimm_banks);
static void program_initplr(unsigned long *dimm_populated,
unsigned char *iic0_dimm_addr,
unsigned long num_dimm_banks,
- ddr_cas_id_t selected_cas);
+ ddr_cas_id_t selected_cas,
+ int write_recovery);
static unsigned long is_ecc_enabled(void);
static void program_ecc(unsigned long *dimm_populated,
unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks);
+ unsigned long num_dimm_banks,
+ unsigned long tlb_word2_i_value);
static void program_ecc_addr(unsigned long start_address,
- unsigned long num_bytes);
-
+ unsigned long num_bytes,
+ unsigned long tlb_word2_i_value);
+static void program_DQS_calibration(unsigned long *dimm_populated,
+ unsigned char *iic0_dimm_addr,
+ unsigned long num_dimm_banks);
#ifdef HARD_CODED_DQS /* calibration test with hardvalues */
static void test(void);
#else
static void DQS_calibration_process(void);
#endif
-static void program_DQS_calibration(unsigned long *dimm_populated,
- unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks);
+#if defined(DEBUG)
+static void ppc440sp_sdram_register_dump(void);
+#endif
+int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
+void dcbz_area(u32 start_address, u32 num_bytes);
+void dflush(void);
static u32 mfdcr_any(u32 dcr)
{
&& ((mcopt2 & SDRAM_MCOPT2_SREN_MASK) == SDRAM_MCOPT2_SREN_EXIT)
&& ((mcstat & (SDRAM_MCSTAT_MIC_MASK | SDRAM_MCSTAT_SRMS_MASK))
== (SDRAM_MCSTAT_MIC_COMP | SDRAM_MCSTAT_SRMS_NOT_SF))) {
- for (i = 0; i < 4; i++) {
+ for (i = 0; i < MAXBXCF; i++) {
mfsdram(SDRAM_MB0CF + (i << 2), mb0cf);
/* Banks enabled */
if ((mb0cf & SDRAM_BXCF_M_BE_MASK) == SDRAM_BXCF_M_BE_ENABLE) {
*-----------------------------------------------------------------------------*/
long int initdram(int board_type)
{
+ unsigned char iic0_dimm_addr[] = SPD_EEPROM_ADDRESS;
unsigned char spd0[MAX_SPD_BYTES];
unsigned char spd1[MAX_SPD_BYTES];
unsigned char *dimm_spd[MAXDIMMS];
unsigned long dimm_populated[MAXDIMMS];
- unsigned char iic0_dimm_addr[MAXDIMMS];
unsigned long num_dimm_banks; /* on board dimm banks */
unsigned long val;
ddr_cas_id_t selected_cas;
+ int write_recovery;
unsigned long dram_size = 0;
num_dimm_banks = sizeof(iic0_dimm_addr);
dimm_spd[0] = spd0;
dimm_spd[1] = spd1;
- /*------------------------------------------------------------------
- * Set up an array of iic0 dimm addresses.
- *-----------------------------------------------------------------*/
- iic0_dimm_addr[0] = IIC0_DIMM0_ADDR;
- iic0_dimm_addr[1] = IIC0_DIMM1_ADDR;
-
/*------------------------------------------------------------------
* Reset the DDR-SDRAM controller.
*-----------------------------------------------------------------*/
- mtsdr(SDR0_SRST, 0x00200000);
+ mtsdr(SDR0_SRST, (0x80000000 >> 10));
mtsdr(SDR0_SRST, 0x00000000);
/*
/*------------------------------------------------------------------
* Program SDRAM mode register.
*-----------------------------------------------------------------*/
- program_mode(dimm_populated, iic0_dimm_addr, num_dimm_banks, &selected_cas);
+ program_mode(dimm_populated, iic0_dimm_addr, num_dimm_banks,
+ &selected_cas, &write_recovery);
/*------------------------------------------------------------------
* Set the SDRAM Write Data/DM/DQS Clock Timing Reg
* Program Initialization preload registers.
*-----------------------------------------------------------------*/
program_initplr(dimm_populated, iic0_dimm_addr, num_dimm_banks,
- selected_cas);
+ selected_cas, write_recovery);
/*------------------------------------------------------------------
* Delay to ensure 200usec have elapsed since reset.
dram_size = sdram_memsize();
/* and program tlb entries for this size (dynamic) */
- program_tlb(0, dram_size);
+ program_tlb(0, dram_size, MY_TLB_WORD2_I_ENABLE);
-#if 1 /* TODO: ECC support will come later */
/*------------------------------------------------------------------
- * If ecc is enabled, initialize the parity bits.
+ * DQS calibration.
*-----------------------------------------------------------------*/
- program_ecc(dimm_populated, iic0_dimm_addr, num_dimm_banks);
-#endif
+ program_DQS_calibration(dimm_populated, iic0_dimm_addr, num_dimm_banks);
/*------------------------------------------------------------------
- * DQS calibration.
+ * If ecc is enabled, initialize the parity bits.
*-----------------------------------------------------------------*/
- program_DQS_calibration(dimm_populated, iic0_dimm_addr, num_dimm_banks);
+ program_ecc(dimm_populated, iic0_dimm_addr, num_dimm_banks, MY_TLB_WORD2_I_ENABLE);
#ifdef DEBUG
ppc440sp_sdram_register_dump();
dimm_type = SDRAM_DDR1;
}
- total_rank += dimm_rank;
- total_dimm ++;
+ total_rank += dimm_rank;
+ total_dimm++;
if ((dimm_num == 0) && (total_dimm == 1))
firstSlot = TRUE;
else
codt |= SDRAM_CODT_DQS_1_8_V_DDR2;
if ((total_dimm == 1) && (firstSlot == TRUE)) {
if (total_rank == 1) {
- codt |= 0x00800000;
- modt0 = 0x01000000;
+ codt |= CALC_ODT_R(0);
+ modt0 = CALC_ODT_W(0);
modt1 = 0x00000000;
modt2 = 0x00000000;
modt3 = 0x00000000;
}
if (total_rank == 2) {
- codt |= 0x02800000;
- modt0 = 0x06000000;
- modt1 = 0x01800000;
+ codt |= CALC_ODT_R(0) | CALC_ODT_R(1);
+ modt0 = CALC_ODT_W(0);
+ modt1 = CALC_ODT_W(0);
modt2 = 0x00000000;
modt3 = 0x00000000;
}
- } else {
+ } else if ((total_dimm == 1) && (firstSlot != TRUE)) {
if (total_rank == 1) {
- codt |= 0x00800000;
- modt0 = 0x01000000;
+ codt |= CALC_ODT_R(2);
+ modt0 = 0x00000000;
modt1 = 0x00000000;
- modt2 = 0x00000000;
+ modt2 = CALC_ODT_W(2);
modt3 = 0x00000000;
}
if (total_rank == 2) {
- codt |= 0x02800000;
- modt0 = 0x06000000;
- modt1 = 0x01800000;
- modt2 = 0x00000000;
- modt3 = 0x00000000;
+ codt |= CALC_ODT_R(2) | CALC_ODT_R(3);
+ modt0 = 0x00000000;
+ modt1 = 0x00000000;
+ modt2 = CALC_ODT_W(2);
+ modt3 = CALC_ODT_W(2);
}
}
if (total_dimm == 2) {
if (total_rank == 2) {
- codt |= 0x08800000;
- modt0 = 0x18000000;
+ codt |= CALC_ODT_R(0) | CALC_ODT_R(2);
+ modt0 = CALC_ODT_RW(2);
modt1 = 0x00000000;
- modt2 = 0x01800000;
+ modt2 = CALC_ODT_RW(0);
modt3 = 0x00000000;
}
if (total_rank == 4) {
- codt |= 0x2a800000;
- modt0 = 0x18000000;
- modt1 = 0x18000000;
- modt2 = 0x01800000;
- modt3 = 0x01800000;
+ codt |= CALC_ODT_R(0) | CALC_ODT_R(1) | CALC_ODT_R(2) | CALC_ODT_R(3);
+ modt0 = CALC_ODT_RW(2);
+ modt1 = 0x00000000;
+ modt2 = CALC_ODT_RW(0);
+ modt3 = 0x00000000;
}
}
} else {
static void program_initplr(unsigned long *dimm_populated,
unsigned char *iic0_dimm_addr,
unsigned long num_dimm_banks,
- ddr_cas_id_t selected_cas)
+ ddr_cas_id_t selected_cas,
+ int write_recovery)
{
- unsigned long MR_CAS_value = 0;
+ u32 cas = 0;
+ u32 odt = 0;
+ u32 ods = 0;
+ u32 mr;
+ u32 wr;
+ u32 emr;
+ u32 emr2;
+ u32 emr3;
+ int dimm_num;
+ int total_dimm = 0;
/******************************************************
** Assumption: if more than one DIMM, all DIMMs are the same
mtsdram(SDRAM_INITPLR7, 0x81000062);
} else if ((dimm_populated[0] == SDRAM_DDR2) || (dimm_populated[1] == SDRAM_DDR2)) {
switch (selected_cas) {
- /*
- * The CAS latency is a field of the Mode Reg
- * that need to be set from caller input.
- * CAS bits in Mode Reg are starting at bit 4 at least for the Micron DDR2
- * this is the reason of the shift.
- */
case DDR_CAS_3:
- MR_CAS_value = 3 << 4;
+ cas = 3 << 4;
break;
case DDR_CAS_4:
- MR_CAS_value = 4 << 4;
+ cas = 4 << 4;
break;
case DDR_CAS_5:
- MR_CAS_value = 5 << 4;
+ cas = 5 << 4;
break;
default:
- printf("ERROR: ucode error on selected_cas value %d", (unsigned char)selected_cas);
+ printf("ERROR: ucode error on selected_cas value %d", selected_cas);
hang();
break;
}
- mtsdram(SDRAM_INITPLR0, 0xB5380000); /* NOP */
- mtsdram(SDRAM_INITPLR1, 0x82100400); /* precharge 8 DDR clock cycle */
- mtsdram(SDRAM_INITPLR2, 0x80820000); /* EMR2 */
- mtsdram(SDRAM_INITPLR3, 0x80830000); /* EMR3 */
- mtsdram(SDRAM_INITPLR4, 0x80810000); /* EMR DLL ENABLE */
- mtsdram(SDRAM_INITPLR5, 0x80800502 | MR_CAS_value); /* MR w/ DLL reset */
- mtsdram(SDRAM_INITPLR6, 0x82100400); /* precharge 8 DDR clock cycle */
- mtsdram(SDRAM_INITPLR7, 0x8a080000); /* Refresh 50 DDR clock cycle */
- mtsdram(SDRAM_INITPLR8, 0x8a080000); /* Refresh 50 DDR clock cycle */
- mtsdram(SDRAM_INITPLR9, 0x8a080000); /* Refresh 50 DDR clock cycle */
- mtsdram(SDRAM_INITPLR10, 0x8a080000); /* Refresh 50 DDR clock cycle */
- mtsdram(SDRAM_INITPLR11, 0x80800402 | MR_CAS_value); /* MR w/o DLL reset */
- mtsdram(SDRAM_INITPLR12, 0x80810380); /* EMR OCD Default */
- mtsdram(SDRAM_INITPLR13, 0x80810000); /* EMR OCD Exit */
+#if 0
+ /*
+ * ToDo - Still a problem with the write recovery:
+ * On the Corsair CM2X512-5400C4 module, setting write recovery
+ * in the INITPLR reg to the value calculated in program_mode()
+ * results in not correctly working DDR2 memory (crash after
+ * relocation).
+ *
+ * So for now, set the write recovery to 3. This seems to work
+ * on the Corair module too.
+ *
+ * 2007-03-01, sr
+ */
+ switch (write_recovery) {
+ case 3:
+ wr = WRITE_RECOV_3;
+ break;
+ case 4:
+ wr = WRITE_RECOV_4;
+ break;
+ case 5:
+ wr = WRITE_RECOV_5;
+ break;
+ case 6:
+ wr = WRITE_RECOV_6;
+ break;
+ default:
+ printf("ERROR: write recovery not support (%d)", write_recovery);
+ hang();
+ break;
+ }
+#else
+ wr = WRITE_RECOV_3; /* test-only, see description above */
+#endif
+
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++)
+ if (dimm_populated[dimm_num] != SDRAM_NONE)
+ total_dimm++;
+ if (total_dimm == 1) {
+ odt = ODT_150_OHM;
+ ods = ODS_FULL;
+ } else if (total_dimm == 2) {
+ odt = ODT_75_OHM;
+ ods = ODS_REDUCED;
+ } else {
+ printf("ERROR: Unsupported number of DIMM's (%d)", total_dimm);
+ hang();
+ }
+
+ mr = CMD_EMR | SELECT_MR | BURST_LEN_4 | wr | cas;
+ emr = CMD_EMR | SELECT_EMR | odt | ods;
+ emr2 = CMD_EMR | SELECT_EMR2;
+ emr3 = CMD_EMR | SELECT_EMR3;
+ mtsdram(SDRAM_INITPLR0, 0xB5000000 | CMD_NOP); /* NOP */
+ udelay(1000);
+ mtsdram(SDRAM_INITPLR1, 0x82000400 | CMD_PRECHARGE); /* precharge 8 DDR clock cycle */
+ mtsdram(SDRAM_INITPLR2, 0x80800000 | emr2); /* EMR2 */
+ mtsdram(SDRAM_INITPLR3, 0x80800000 | emr3); /* EMR3 */
+ mtsdram(SDRAM_INITPLR4, 0x80800000 | emr); /* EMR DLL ENABLE */
+ mtsdram(SDRAM_INITPLR5, 0x80800000 | mr | DLL_RESET); /* MR w/ DLL reset */
+ udelay(1000);
+ mtsdram(SDRAM_INITPLR6, 0x82000400 | CMD_PRECHARGE); /* precharge 8 DDR clock cycle */
+ mtsdram(SDRAM_INITPLR7, 0x8a000000 | CMD_REFRESH); /* Refresh 50 DDR clock cycle */
+ mtsdram(SDRAM_INITPLR8, 0x8a000000 | CMD_REFRESH); /* Refresh 50 DDR clock cycle */
+ mtsdram(SDRAM_INITPLR9, 0x8a000000 | CMD_REFRESH); /* Refresh 50 DDR clock cycle */
+ mtsdram(SDRAM_INITPLR10, 0x8a000000 | CMD_REFRESH); /* Refresh 50 DDR clock cycle */
+ mtsdram(SDRAM_INITPLR11, 0x80000000 | mr); /* MR w/o DLL reset */
+ mtsdram(SDRAM_INITPLR12, 0x80800380 | emr); /* EMR OCD Default */
+ mtsdram(SDRAM_INITPLR13, 0x80800000 | emr); /* EMR OCD Exit */
} else {
printf("ERROR: ucode error as unknown DDR type in program_initplr");
hang();
static void program_mode(unsigned long *dimm_populated,
unsigned char *iic0_dimm_addr,
unsigned long num_dimm_banks,
- ddr_cas_id_t *selected_cas)
+ ddr_cas_id_t *selected_cas,
+ int *write_recovery)
{
unsigned long dimm_num;
unsigned long sdram_ddr1;
mmode |= SDRAM_MMODE_WR_DDR2_6_CYC;
break;
}
+ *write_recovery = t_wr_clk;
}
+ debug("CAS latency = %d\n", *selected_cas);
+ debug("Write recovery = %d\n", *write_recovery);
+
mtsdram(SDRAM_MMODE, mmode);
}
*-----------------------------------------------------------------------------*/
static void program_ecc(unsigned long *dimm_populated,
unsigned char *iic0_dimm_addr,
- unsigned long num_dimm_banks)
+ unsigned long num_dimm_banks,
+ unsigned long tlb_word2_i_value)
{
unsigned long mcopt1;
unsigned long mcopt2;
&& ((mcstat & (SDRAM_MCSTAT_MIC_MASK | SDRAM_MCSTAT_SRMS_MASK))
== (SDRAM_MCSTAT_MIC_COMP | SDRAM_MCSTAT_SRMS_NOT_SF))) {
- program_ecc_addr(0, sdram_memsize());
+ program_ecc_addr(0, sdram_memsize(), tlb_word2_i_value);
}
}
return;
}
+#ifdef CONFIG_ECC_ERROR_RESET
+/*
+ * Check for ECC errors and reset board upon any error here
+ *
+ * On the Katmai 440SPe eval board, from time to time, the first
+ * lword write access after DDR2 initializazion with ECC checking
+ * enabled, leads to an ECC error. I couldn't find a configuration
+ * without this happening. On my board with the current setup it
+ * happens about 1 from 10 times.
+ *
+ * The ECC modules used for testing are:
+ * - Kingston ValueRAM KVR667D2E5/512 (tested with 1 and 2 DIMM's)
+ *
+ * This has to get fixed for the Katmai and tested for the other
+ * board (440SP/440SPe) that will eventually use this code in the
+ * future.
+ *
+ * 2007-03-01, sr
+ */
+static void check_ecc(void)
+{
+ u32 val;
+
+ mfsdram(SDRAM_ECCCR, val);
+ if (val != 0) {
+ printf("\nECC error: MCIF0_ECCES=%08lx MQ0_ESL=%08lx address=%08lx\n",
+ val, mfdcr(0x4c), mfdcr(0x4e));
+ printf("ECC error occured, resetting board...\n");
+ do_reset(NULL, 0, 0, NULL);
+ }
+}
+#endif
+
/*-----------------------------------------------------------------------------+
* program_ecc_addr.
*-----------------------------------------------------------------------------*/
static void program_ecc_addr(unsigned long start_address,
- unsigned long num_bytes)
+ unsigned long num_bytes,
+ unsigned long tlb_word2_i_value)
{
unsigned long current_address;
unsigned long end_address;
unsigned long address_increment;
unsigned long mcopt1;
+ char str[] = "ECC generation...";
+ int i;
current_address = start_address;
mfsdram(SDRAM_MCOPT1, mcopt1);
eieio();
wait_ddr_idle();
- /* ECC bit set method for non-cached memory */
- if ((mcopt1 & SDRAM_MCOPT1_DMWD_MASK) == SDRAM_MCOPT1_DMWD_32)
- address_increment = 4;
- else
- address_increment = 8;
- end_address = current_address + num_bytes;
+ puts(str);
+ if (tlb_word2_i_value == TLB_WORD2_I_ENABLE) {
+ /* ECC bit set method for non-cached memory */
+ if ((mcopt1 & SDRAM_MCOPT1_DMWD_MASK) == SDRAM_MCOPT1_DMWD_32)
+ address_increment = 4;
+ else
+ address_increment = 8;
+ end_address = current_address + num_bytes;
- while (current_address < end_address) {
- *((unsigned long *)current_address) = 0x00000000;
- current_address += address_increment;
+ while (current_address < end_address) {
+ *((unsigned long *)current_address) = 0x00000000;
+ current_address += address_increment;
+ }
+ } else {
+ /* ECC bit set method for cached memory */
+ dcbz_area(start_address, num_bytes);
+ dflush();
}
+ for (i=0; i<strlen(str); i++)
+ putc('\b');
+
sync();
eieio();
wait_ddr_idle();
+ /* clear ECC error repoting registers */
+ mtsdram(SDRAM_ECCCR, 0xffffffff);
+ mtdcr(0x4c, 0xffffffff);
+
mtsdram(SDRAM_MCOPT1,
- (mcopt1 & ~SDRAM_MCOPT1_MCHK_MASK) | SDRAM_MCOPT1_MCHK_CHK);
+ (mcopt1 & ~SDRAM_MCOPT1_MCHK_MASK) | SDRAM_MCOPT1_MCHK_CHK_REP);
sync();
eieio();
wait_ddr_idle();
+
+#ifdef CONFIG_ECC_ERROR_RESET
+ /*
+ * One write to 0 is enough to trigger this ECC error
+ * (see description above)
+ */
+ out_be32(0, 0x12345678);
+ check_ecc();
+#endif
}
}
projects / u-boot / commitdiff