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Diffstat (limited to 'cpu/mpc83xx/spd_sdram.c')
-rw-r--r--cpu/mpc83xx/spd_sdram.c304
1 files changed, 151 insertions, 153 deletions
diff --git a/cpu/mpc83xx/spd_sdram.c b/cpu/mpc83xx/spd_sdram.c
index 3dfde8a..acc8c9e 100644
--- a/cpu/mpc83xx/spd_sdram.c
+++ b/cpu/mpc83xx/spd_sdram.c
@@ -4,7 +4,7 @@
* (C) Copyright 2006
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
- * Copyright 2004 Freescale Semiconductor.
+ * Copyright (C) 2004-2006 Freescale Semiconductor, Inc.
* (C) Copyright 2003 Motorola Inc.
* Xianghua Xiao (X.Xiao@motorola.com)
*
@@ -112,14 +112,10 @@ static void spd_debug(spd_eeprom_t *spd)
long int spd_sdram()
{
-#ifdef CONFIG_MPC834X
- int caslat_83xx; /* For Errata DDR6 */
-#endif
volatile immap_t *immap = (immap_t *)CFG_IMMRBAR;
volatile ddr83xx_t *ddr = &immap->ddr;
volatile law83xx_t *ecm = &immap->sysconf.ddrlaw[0];
spd_eeprom_t spd;
- unsigned int tmp, tmp1;
unsigned int memsize;
unsigned int law_size;
unsigned char caslat, caslat_ctrl;
@@ -131,28 +127,7 @@ long int spd_sdram()
unsigned sdram_cfg;
unsigned int ddrc_ecc_enable;
-
/* Read SPD parameters with I2C */
-#ifdef CFG_83XX_DDR_USES_CS0
- ddr->csbnds[0].csbnds = (banksize(spd.row_dens) >> 24) - 1;
- ddr->cs_config[0] = ( 1 << 31
- | (spd.nrow_addr - 12) << 8
- | (spd.ncol_addr - 8) );
- debug("\n");
- debug("cs0_bnds = 0x%08x\n",ddr->csbnds[0].csbnds);
- debug("cs0_config = 0x%08x\n",ddr->cs_config[0]);
-
- if (spd.nrows == 2) {
- ddr->csbnds[1].csbnds = ( (banksize(spd.row_dens) >> 8)
- | ((banksize(spd.row_dens) >> 23) - 1) );
- ddr->cs_config[1] = ( 1<<31
- | (spd.nrow_addr-12) << 8
- | (spd.ncol_addr-8) );
- debug("cs1_bnds = 0x%08x\n",ddr->csbnds[1].csbnds);
- debug("cs1_config = 0x%08x\n",ddr->cs_config[1]);
- }
-
-#else
CFG_READ_SPD(SPD_EEPROM_ADDRESS, 0, 1, (uchar *) & spd, sizeof (spd));
#ifdef SPD_DEBUG
spd_debug(&spd);
@@ -183,6 +158,26 @@ long int spd_sdram()
return 0;
}
/* Setup DDR chip select register */
+#ifdef CFG_83XX_DDR_USES_CS0
+ ddr->csbnds[0].csbnds = (banksize(spd.row_dens) >> 24) - 1;
+ ddr->cs_config[0] = ( 1 << 31
+ | (spd.nrow_addr - 12) << 8
+ | (spd.ncol_addr - 8) );
+ debug("\n");
+ debug("cs0_bnds = 0x%08x\n",ddr->csbnds[0].csbnds);
+ debug("cs0_config = 0x%08x\n",ddr->cs_config[0]);
+
+ if (spd.nrows == 2) {
+ ddr->csbnds[1].csbnds = ( (banksize(spd.row_dens) >> 8)
+ | ((banksize(spd.row_dens) >> 23) - 1) );
+ ddr->cs_config[1] = ( 1<<31
+ | (spd.nrow_addr-12) << 8
+ | (spd.ncol_addr-8) );
+ debug("cs1_bnds = 0x%08x\n",ddr->csbnds[1].csbnds);
+ debug("cs1_config = 0x%08x\n",ddr->cs_config[1]);
+ }
+
+#else
ddr->csbnds[2].csbnds = (banksize(spd.row_dens) >> 24) - 1;
ddr->cs_config[2] = ( 1 << 31
| (spd.nrow_addr - 12) << 8
@@ -243,8 +238,9 @@ long int spd_sdram()
*/
caslat = __ilog2(spd.cas_lat);
- if (caslat > 4 ) {
- printf("DDR: Invalid SPD CAS Latency, caslat=%02X\n", caslat);
+ if (caslat > 6 ) {
+ printf("DDR: Invalid SPD CAS Latency, caslat=%02X\n",
+ spd.cas_lat);
return 0;
}
max_bus_clk = 1000 *10 / (((spd.clk_cycle & 0xF0) >> 4) * 10
@@ -256,89 +252,110 @@ long int spd_sdram()
ddrc_clk = get_ddr_clk(0) / 1000000;
if (max_data_rate >= 390) { /* it is DDR 400 */
- printf("DDR: platform not support DDR 400\n");
- return 0;
+ if (ddrc_clk <= 410 && ddrc_clk > 350) {
+ /* DDR controller clk at 350~410 */
+ effective_data_rate = 400; /* 5ns */
+ caslat = caslat;
+ } else if (ddrc_clk <= 350 && ddrc_clk > 280) {
+ /* DDR controller clk at 280~350 */
+ effective_data_rate = 333; /* 6ns */
+ if (spd.clk_cycle2 == 0x60) {
+ caslat = caslat - 1;
+ } else {
+ caslat = caslat;
+ }
+ } else if (ddrc_clk <= 280 && ddrc_clk > 230) {
+ /* DDR controller clk at 230~280 */
+ effective_data_rate = 266; /* 7.5ns */
+ if (spd.clk_cycle3 == 0x75) {
+ caslat = caslat - 2;
+ } else if (spd.clk_cycle2 == 0x60) {
+ caslat = caslat - 1;
+ } else {
+ caslat = caslat;
+ }
+ } else if (ddrc_clk <= 230 && ddrc_clk > 90) {
+ /* DDR controller clk at 90~230 */
+ effective_data_rate = 200; /* 10ns */
+ if (spd.clk_cycle3 == 0x75) {
+ caslat = caslat - 2;
+ } else if (spd.clk_cycle2 == 0x60) {
+ caslat = caslat - 1;
+ } else {
+ caslat = caslat;
+ }
+ }
} else if (max_data_rate >= 323) { /* it is DDR 333 */
if (ddrc_clk <= 350 && ddrc_clk > 280) {
- /* DDRC clk at 280~350 */
+ /* DDR controller clk at 280~350 */
effective_data_rate = 333; /* 6ns */
caslat = caslat;
} else if (ddrc_clk <= 280 && ddrc_clk > 230) {
- /* DDRC clk at 230~280 */
+ /* DDR controller clk at 230~280 */
+ effective_data_rate = 266; /* 7.5ns */
if (spd.clk_cycle2 == 0x75) {
- effective_data_rate = 266; /* 7.5ns */
caslat = caslat - 1;
+ } else {
+ caslat = caslat;
}
} else if (ddrc_clk <= 230 && ddrc_clk > 90) {
- /* DDRC clk at 90~230 */
+ /* DDR controller clk at 90~230 */
+ effective_data_rate = 200; /* 10ns */
if (spd.clk_cycle3 == 0xa0) {
- effective_data_rate = 200; /* 10ns */
caslat = caslat - 2;
+ } else if (spd.clk_cycle2 == 0x75) {
+ caslat = caslat - 1;
+ } else {
+ caslat = caslat;
}
}
} else if (max_data_rate >= 256) { /* it is DDR 266 */
if (ddrc_clk <= 350 && ddrc_clk > 280) {
- /* DDRC clk at 280~350 */
+ /* DDR controller clk at 280~350 */
printf("DDR: DDR controller freq is more than "
"max data rate of the module\n");
return 0;
} else if (ddrc_clk <= 280 && ddrc_clk > 230) {
- /* DDRC clk at 230~280 */
+ /* DDR controller clk at 230~280 */
effective_data_rate = 266; /* 7.5ns */
caslat = caslat;
} else if (ddrc_clk <= 230 && ddrc_clk > 90) {
- /* DDRC clk at 90~230 */
+ /* DDR controller clk at 90~230 */
+ effective_data_rate = 200; /* 10ns */
if (spd.clk_cycle2 == 0xa0) {
- effective_data_rate = 200; /* 10ns */
caslat = caslat - 1;
}
}
} else if (max_data_rate >= 190) { /* it is DDR 200 */
if (ddrc_clk <= 350 && ddrc_clk > 230) {
- /* DDRC clk at 230~350 */
+ /* DDR controller clk at 230~350 */
printf("DDR: DDR controller freq is more than "
"max data rate of the module\n");
return 0;
} else if (ddrc_clk <= 230 && ddrc_clk > 90) {
- /* DDRC clk at 90~230 */
+ /* DDR controller clk at 90~230 */
effective_data_rate = 200; /* 10ns */
caslat = caslat;
}
}
-#ifdef CONFIG_MPC834X
-/* Errata DDR6
- This errata affects all MPC8349E, MPC8343E and MPC8347E processors.
-*/
- if ((tmp1 >= 280) && (tmp1 < 350)) /* CSB=333 */
- {
- if (spd.mid[0] == 0x2c) {
- /* Micron memory running at 333 MHz */
- /* Chances are, U-Boot will crash before we get here,
- but just in case, display a message and return error. */
- printf("Micron DDR not supported at 333MHz CSB\n");
- return 0;
- } else if (spd.mid[0] == 0xad) {
- printf("Hynix DDR does not require Errata DDR6\n");
- } else {
- /* enable 2 cycle Earlier for CL=2.5 or 3 */
- ddr->debug_reg = 0x202c0000;
- printf("Errata DDR6 (debug_reg=0x%x)\n", ddr->debug_reg);
- }
- caslat_83xx = caslat;
- }
-
- if ((tmp1 >= 230) && (tmp1 < 280)) { /* CSB=266 */
- if (spd.mid[0] != 0x2c) /* non-Micron */
- caslat_83xx = caslat - 1;
+ debug("DDR:Effective data rate is: %dMhz\n", effective_data_rate);
+ debug("DDR:The MSB 1 of CAS Latency is: %d\n", caslat);
+ /*
+ * Errata DDR6 work around: input enable 2 cycles earlier.
+ * including MPC834x Rev1.0/1.1 and MPC8360 Rev1.1/1.2.
+ */
+ if (caslat == 2) {
+ ddr->debug_reg = 0x201c0000; /* CL=2 */
+ } else if (caslat == 3) {
+ ddr->debug_reg = 0x202c0000; /* CL=2.5 */
+ } else if (caslat == 4) {
+ ddr->debug_reg = 0x202c0000; /* CL=3.0 */
}
+ __asm__ __volatile__ ("sync");
- if ((tmp1 >= 90) && (tmp1 < 230)) { /* CSB=200 */
- caslat = 3;
- caslat_83xx = 2;
- }
-#endif
+ debug("Errata DDR6 (debug_reg=0x%08x)\n", ddr->debug_reg);
/*
* note: caslat must also be programmed into ddr->sdram_mode
@@ -353,11 +370,7 @@ long int spd_sdram()
(((picos_to_clk(spd.trp * 250) & 0x07) << 28 ) |
((picos_to_clk(spd.tras * 1000) & 0x0f ) << 24 ) |
((picos_to_clk(spd.trcd * 250) & 0x07) << 20 ) |
-#ifdef CONFIG_MPC834x
- ((caslat_83xx & 0x07) << 16 ) |
-#else
((caslat_ctrl & 0x07) << 16 ) |
-#endif
(((picos_to_clk(spd.trfc * 1000) - 8) & 0x0f) << 12 ) |
( 0x300 ) |
((picos_to_clk(spd.trrd * 250) & 0x07) << 4) | 1);
@@ -370,13 +383,10 @@ long int spd_sdram()
ddr->sdram_cfg = 0x42000000;
/* Check DIMM data bus width */
- if (spd.dataw_lsb == 0x20)
- {
+ if (spd.dataw_lsb == 0x20) {
burstlen = 0x03; /* 32 bit data bus, burst len is 8 */
printf("\n DDR DIMM: data bus width is 32 bit");
- }
- else
- {
+ } else {
burstlen = 0x02; /* Others act as 64 bit bus, burst len is 4 */
printf("\n DDR DIMM: data bus width is 64 bit");
}
@@ -384,68 +394,67 @@ long int spd_sdram()
/* Is this an ECC DDR chip? */
if (spd.config == 0x02) {
printf(" with ECC\n");
- }
- else
+ } else {
printf(" without ECC\n");
+ }
/* Burst length is always 4 for 64 bit data bus, 8 for 32 bit data bus,
Burst type is sequential
*/
- switch(caslat) {
- case 1:
- ddr->sdram_mode = 0x50 | burstlen; /* CL=1.5 */
- break;
- case 2:
- ddr->sdram_mode = 0x20 | burstlen; /* CL=2.0 */
- break;
- case 3:
- ddr->sdram_mode = 0x60 | burstlen; /* CL=2.5 */
- break;
- case 4:
- ddr->sdram_mode = 0x30 | burstlen; /* CL=3.0 */
- break;
- default:
- printf("DDR:only CAS Latency 1.5, 2.0, 2.5, 3.0 "
- "is supported.\n");
- return 0;
+ switch (caslat) {
+ case 1:
+ ddr->sdram_mode = 0x50 | burstlen; /* CL=1.5 */
+ break;
+ case 2:
+ ddr->sdram_mode = 0x20 | burstlen; /* CL=2.0 */
+ break;
+ case 3:
+ ddr->sdram_mode = 0x60 | burstlen; /* CL=2.5 */
+ break;
+ case 4:
+ ddr->sdram_mode = 0x30 | burstlen; /* CL=3.0 */
+ break;
+ default:
+ printf("DDR:only CL 1.5, 2.0, 2.5, 3.0 is supported\n");
+ return 0;
}
debug("DDR:sdram_mode=0x%08x\n", ddr->sdram_mode);
- switch(spd.refresh) {
- case 0x00:
- case 0x80:
- tmp = picos_to_clk(15625000);
- break;
- case 0x01:
- case 0x81:
- tmp = picos_to_clk(3900000);
- break;
- case 0x02:
- case 0x82:
- tmp = picos_to_clk(7800000);
- break;
- case 0x03:
- case 0x83:
- tmp = picos_to_clk(31300000);
- break;
- case 0x04:
- case 0x84:
- tmp = picos_to_clk(62500000);
- break;
- case 0x05:
- case 0x85:
- tmp = picos_to_clk(125000000);
- break;
- default:
- tmp = 0x512;
- break;
+ switch (spd.refresh) {
+ case 0x00:
+ case 0x80:
+ refresh_clk = picos_to_clk(15625000);
+ break;
+ case 0x01:
+ case 0x81:
+ refresh_clk = picos_to_clk(3900000);
+ break;
+ case 0x02:
+ case 0x82:
+ refresh_clk = picos_to_clk(7800000);
+ break;
+ case 0x03:
+ case 0x83:
+ refresh_clk = picos_to_clk(31300000);
+ break;
+ case 0x04:
+ case 0x84:
+ refresh_clk = picos_to_clk(62500000);
+ break;
+ case 0x05:
+ case 0x85:
+ refresh_clk = picos_to_clk(125000000);
+ break;
+ default:
+ refresh_clk = 0x512;
+ break;
}
/*
* Set BSTOPRE to 0x100 for page mode
* If auto-charge is used, set BSTOPRE = 0
*/
- ddr->sdram_interval = ((tmp & 0x3fff) << 16) | 0x100;
+ ddr->sdram_interval = ((refresh_clk & 0x3fff) << 16) | 0x100;
debug("DDR:sdram_interval=0x%08x\n", ddr->sdram_interval);
/* SS_EN = 0, source synchronous disable
@@ -459,8 +468,8 @@ long int spd_sdram()
udelay(600);
/*
- * Figure out the settings for the sdram_cfg register. Build up
- * the entire register in 'tmp' before writing since the write into
+ * Figure out the settings for the sdram_cfg register. Build up
+ * the value in 'sdram_cfg' before writing since the write into
* the register will actually enable the memory controller, and all
* settings must be done before enabling.
*
@@ -493,13 +502,13 @@ long int spd_sdram()
/* set single bit error threshold to maximum value,
* reset counter to zero */
ddr->err_sbe = (255 << ECC_ERROR_MAN_SBET_SHIFT) |
- (0 << ECC_ERROR_MAN_SBEC_SHIFT);
+ (0 << ECC_ERROR_MAN_SBEC_SHIFT);
}
debug("DDR:err_disable=0x%08x\n", ddr->err_disable);
debug("DDR:err_sbe=0x%08x\n", ddr->err_sbe);
#endif
- printf(" DDRC ECC mode: %s", ddrc_ecc_enable ? "ON":"OFF");
+ printf(" DDRC ECC mode: %s\n", ddrc_ecc_enable ? "ON":"OFF");
#if defined(CONFIG_DDR_2T_TIMING)
/*
@@ -517,7 +526,6 @@ long int spd_sdram()
}
#endif /* CONFIG_SPD_EEPROM */
-
#if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRC)
/*
* Use timebase counter, get_timer() is not availabe
@@ -602,26 +610,16 @@ void ddr_enable_ecc(unsigned int dram_size)
}
}
- /* 8K */
- dma_xfer((uint *)0x2000, 0x2000, (uint *)0);
- /* 16K */
- dma_xfer((uint *)0x4000, 0x4000, (uint *)0);
- /* 32K */
- dma_xfer((uint *)0x8000, 0x8000, (uint *)0);
- /* 64K */
- dma_xfer((uint *)0x10000, 0x10000, (uint *)0);
- /* 128k */
- dma_xfer((uint *)0x20000, 0x20000, (uint *)0);
- /* 256k */
- dma_xfer((uint *)0x40000, 0x40000, (uint *)0);
- /* 512k */
- dma_xfer((uint *)0x80000, 0x80000, (uint *)0);
- /* 1M */
- dma_xfer((uint *)0x100000, 0x100000, (uint *)0);
- /* 2M */
- dma_xfer((uint *)0x200000, 0x200000, (uint *)0);
- /* 4M */
- dma_xfer((uint *)0x400000, 0x400000, (uint *)0);
+ dma_xfer((uint *)0x2000, 0x2000, (uint *)0); /* 8K */
+ dma_xfer((uint *)0x4000, 0x4000, (uint *)0); /* 16K */
+ dma_xfer((uint *)0x8000, 0x8000, (uint *)0); /* 32K */
+ dma_xfer((uint *)0x10000, 0x10000, (uint *)0); /* 64K */
+ dma_xfer((uint *)0x20000, 0x20000, (uint *)0); /* 128K */
+ dma_xfer((uint *)0x40000, 0x40000, (uint *)0); /* 256K */
+ dma_xfer((uint *)0x80000, 0x80000, (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);
generated by cgit v1.1 at 2024-11-01 16:06:45 +0000