/*
* cpu/ppc4xx/44x_spd_ddr2.c
* This SPD SDRAM detection code supports AMCC PPC44x cpu's with a
- * DDR2 controller (non Denali Core). Those are 440SP/SPe.
+ * DDR2 controller (non Denali Core). Those currently are:
*
- * (C) Copyright 2007
+ * 405: 405EX
+ * 440/460: 440SP/440SPe/460EX/460GT
+ *
+ * (C) Copyright 2007-2008
* Stefan Roese, DENX Software Engineering, sr@denx.de.
*
* COPYRIGHT AMCC CORPORATION 2004
#include <asm/io.h>
#include <asm/processor.h>
#include <asm/mmu.h>
+#include <asm/cache.h>
#if defined(CONFIG_SPD_EEPROM) && \
- (defined(CONFIG_440SP) || defined(CONFIG_440SPE))
+ (defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
+ defined(CONFIG_460EX) || defined(CONFIG_460GT))
/*-----------------------------------------------------------------------------+
* Defines
#define NUMMEMWORDS 8
#define NUMLOOPS 64 /* memory test loops */
-#undef 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
static void ppc440sp_sdram_register_dump(void);
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)
{
unsigned char spd1[MAX_SPD_BYTES];
unsigned char *dimm_spd[MAXDIMMS];
unsigned long dimm_populated[MAXDIMMS];
- unsigned long num_dimm_banks; /* on board dimm banks */
+ unsigned long num_dimm_banks; /* on board dimm banks */
unsigned long val;
- ddr_cas_id_t selected_cas;
+ ddr_cas_id_t selected_cas = DDR_CAS_5; /* preset to silence compiler */
int write_recovery;
unsigned long dram_size = 0;
ppc440sp_sdram_register_dump();
+ /*
+ * Clear potential errors resulting from auto-calibration.
+ * If not done, then we could get an interrupt later on when
+ * exceptions are enabled.
+ */
+ set_mcsr(get_mcsr());
+
return dram_size;
}
if (num_banks == 4)
ind = 0;
else
- ind = 5;
+ ind = 5 << 8;
switch (num_col_addr) {
case 0x08:
mode |= (SDRAM_BXCF_M_AM_0 + ind);
unsigned long baseadd_size;
unsigned long i;
unsigned long bank_0_populated = 0;
+ unsigned long total_size = 0;
/*------------------------------------------------------------------
* Reset the rank_base_address.
* Set the sizes
*-----------------------------------------------------------------*/
baseadd_size = 0;
- rank_size_bytes = 4 * 1024 * 1024 * rank_size_id;
switch (rank_size_id) {
+ case 0x01:
+ baseadd_size |= SDRAM_RXBAS_SDSZ_1024;
+ total_size = 1024;
+ break;
case 0x02:
- baseadd_size |= SDRAM_RXBAS_SDSZ_8;
+ baseadd_size |= SDRAM_RXBAS_SDSZ_2048;
+ total_size = 2048;
break;
case 0x04:
- baseadd_size |= SDRAM_RXBAS_SDSZ_16;
+ baseadd_size |= SDRAM_RXBAS_SDSZ_4096;
+ total_size = 4096;
break;
case 0x08:
baseadd_size |= SDRAM_RXBAS_SDSZ_32;
+ total_size = 32;
break;
case 0x10:
baseadd_size |= SDRAM_RXBAS_SDSZ_64;
+ total_size = 64;
break;
case 0x20:
baseadd_size |= SDRAM_RXBAS_SDSZ_128;
+ total_size = 128;
break;
case 0x40:
baseadd_size |= SDRAM_RXBAS_SDSZ_256;
+ total_size = 256;
break;
case 0x80:
baseadd_size |= SDRAM_RXBAS_SDSZ_512;
+ total_size = 512;
break;
default:
printf("DDR-SDRAM: DIMM %d memory queue configuration.\n",
printf("Replace the DIMM module with a supported DIMM.\n\n");
spd_ddr_init_hang ();
}
+ rank_size_bytes = total_size << 20;
if ((dimm_populated[dimm_num] != SDRAM_NONE) && (dimm_num == 1))
bank_0_populated = 1;
}
}
}
+
+#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
+ /*
+ * Enable high bandwidth access on 460EX/GT.
+ * This should/could probably be done on other
+ * PPC's too, like 440SPe.
+ * This is currently not used, but with this setup
+ * it is possible to use it later on in e.g. the Linux
+ * EMAC driver for performance gain.
+ */
+ mtdcr(SDRAM_PLBADDULL, 0x00000000); /* MQ0_BAUL */
+ mtdcr(SDRAM_PLBADDUHB, 0x00000008); /* MQ0_BAUH */
+#endif
}
/*-----------------------------------------------------------------------------+
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
-
static void wait_ddr_idle(void)
{
u32 val;
} else {
/* ECC bit set method for cached memory */
dcbz_area(start_address, num_bytes);
- dflush();
+ /* Write modified dcache lines back to memory */
+ clean_dcache_range(start_address, start_address + num_bytes);
}
blank_string(strlen(str));
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
}
}
#endif
* Read sample cycle auto-update enable
*-----------------------------------------------------------------*/
- /*
- * Modified for the Katmai platform: with some DIMMs, the DDR2
- * controller automatically selects the T2 read cycle, but this
- * proves unreliable. Go ahead and force the DDR2 controller
- * to use the T4 sample and disable the automatic update of the
- * RDSS field.
- */
mfsdram(SDRAM_RDCC, val);
mtsdram(SDRAM_RDCC,
(val & ~(SDRAM_RDCC_RDSS_MASK | SDRAM_RDCC_RSAE_MASK))
- | (SDRAM_RDCC_RDSS_T4 | SDRAM_RDCC_RSAE_DISABLE));
+ | SDRAM_RDCC_RSAE_ENABLE);
/*------------------------------------------------------------------
* Program RQDC register
{
unsigned long rfdc_reg;
unsigned long rffd;
- unsigned long rqdc_reg;
- unsigned long rqfd;
unsigned long val;
- long rqfd_average;
long rffd_average;
long max_start;
long min_end;
long max_end;
unsigned char fail_found;
unsigned char pass_found;
+#if !defined(CONFIG_DDR_RQDC_FIXED)
+ u32 rqdc_reg;
+ u32 rqfd;
u32 rqfd_start;
+ u32 rqfd_average;
+ int loopi = 0;
char str[] = "Auto calibration -";
char slash[] = "\\|/-\\|/-";
- int loopi = 0;
/*------------------------------------------------------------------
* Test to determine the best read clock delay tuning bits.
mfsdram(SDRAM_RQDC, rqdc_reg);
mtsdram(SDRAM_RQDC, (rqdc_reg & ~SDRAM_RQDC_RQFD_MASK) |
SDRAM_RQDC_RQFD_ENCODE(rqfd_start));
+#else /* CONFIG_DDR_RQDC_FIXED */
+ /*
+ * On Katmai the complete auto-calibration somehow doesn't seem to
+ * produce the best results, meaning optimal values for RQFD/RFFD.
+ * This was discovered by GDA using a high bandwidth scope,
+ * analyzing the DDR2 signals. GDA provided a fixed value for RQFD,
+ * so now on Katmai "only" RFFD is auto-calibrated.
+ */
+ mtsdram(SDRAM_RQDC, CONFIG_DDR_RQDC_FIXED);
+#endif /* CONFIG_DDR_RQDC_FIXED */
max_start = 0;
min_end = 0;
/* now fix RFDC[RFFD] found and find RQDC[RQFD] */
mtsdram(SDRAM_RFDC, rfdc_reg | SDRAM_RFDC_RFFD_ENCODE(rffd_average));
+#if !defined(CONFIG_DDR_RQDC_FIXED)
max_pass_length = 0;
max_start = 0;
max_end = 0;
spd_ddr_init_hang ();
}
- blank_string(strlen(str));
-
if (rqfd_average < 0)
rqfd_average = 0;
(rqdc_reg & ~SDRAM_RQDC_RQFD_MASK) |
SDRAM_RQDC_RQFD_ENCODE(rqfd_average));
+ blank_string(strlen(str));
+#endif /* CONFIG_DDR_RQDC_FIXED */
+
+ /*
+ * Now complete RDSS configuration as mentioned on page 7 of the AMCC
+ * PowerPC440SP/SPe DDR2 application note:
+ * "DDR1/DDR2 Initialization Sequence and Dynamic Tuning"
+ */
+ mfsdram(SDRAM_RTSR, val);
+ if ((val & SDRAM_RTSR_TRK1SM_MASK) == SDRAM_RTSR_TRK1SM_ATPLS1) {
+ mfsdram(SDRAM_RDCC, val);
+ if ((val & SDRAM_RDCC_RDSS_MASK) != SDRAM_RDCC_RDSS_T4) {
+ val += 0x40000000;
+ mtsdram(SDRAM_RDCC, val);
+ }
+ }
+
mfsdram(SDRAM_DLCR, val);
debug("%s[%d] DLCR: 0x%08X\n", __FUNCTION__, __LINE__, val);
mfsdram(SDRAM_RQDC, val);
debug("%s[%d] RQDC: 0x%08X\n", __FUNCTION__, __LINE__, val);
mfsdram(SDRAM_RFDC, val);
debug("%s[%d] RFDC: 0x%08X\n", __FUNCTION__, __LINE__, val);
+ mfsdram(SDRAM_RDCC, val);
+ debug("%s[%d] RDCC: 0x%08X\n", __FUNCTION__, __LINE__, val);
}
#else /* calibration test with hardvalues */
/*-----------------------------------------------------------------------------+
projects / u-boot / blobdiff