/*
- * Copyright 2004 Freescale Semiconductor.
+ * Copyright 2004, 2007 Freescale Semiconductor.
* (C) Copyright 2003 Motorola Inc.
* Xianghua Xiao (X.Xiao@motorola.com)
*
#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)
{
int clks;
- clks = picos / (2000000000 / (get_bus_freq(0) / 1000));
- if (picos % (2000000000 / (get_bus_freq(0) / 1000)) != 0) {
+ clks = picos / (2000000000 / (get_ddr_freq(0) / 1000));
+ if (picos % (2000000000 / (get_ddr_freq(0) / 1000)) != 0) {
clks++;
}
800,
900,
250,
- 330, /* FIXME: Is 333 better/valid? */
- 660, /* FIXME: Is 667 better/valid? */
+ 330,
+ 660,
750,
0, /* undefined */
0 /* undefined */
}
+/*
+ * 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_sdram(void)
{
- volatile immap_t *immap = (immap_t *)CFG_IMMR;
- volatile ccsr_ddr_t *ddr = &immap->im_ddr;
- volatile ccsr_gur_t *gur = &immap->im_gur;
+ volatile ccsr_ddr_t *ddr = (void *)(CFG_MPC85xx_DDR_ADDR);
spd_eeprom_t spd;
unsigned int n_ranks;
unsigned int rank_density;
- unsigned int odt_rd_cfg, odt_wr_cfg;
+ unsigned int odt_rd_cfg, odt_wr_cfg, ba_bits;
unsigned int odt_cfg, mode_odt_enable;
+ unsigned int refresh_clk;
+#ifdef MPC85xx_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, effective_data_rate;
unsigned int busfreq;
unsigned sdram_cfg;
- unsigned int memsize;
+ unsigned int memsize = 0;
unsigned char caslat, caslat_ctrl;
unsigned int trfc, trfc_clk, trfc_low, trfc_high;
unsigned int trcd_clk;
unsigned int mode_caslat;
unsigned char sdram_type;
unsigned char d_init;
+ unsigned int bnds;
+
+ /*
+ * Skip configuration if already configured.
+ * memsize is determined from last configured chip select.
+ */
+ if (ddr->cs0_config & 0x80000000) {
+ debug(" cs0 already configured, bnds=%x\n",ddr->cs0_bnds);
+ bnds = 0xfff & ddr->cs0_bnds;
+ if (bnds < 0xff) { /* do not add if at top of 4G */
+ memsize = (bnds + 1) << 4;
+ }
+ }
+ if (ddr->cs1_config & 0x80000000) {
+ debug(" cs1 already configured, bnds=%x\n",ddr->cs1_bnds);
+ bnds = 0xfff & ddr->cs1_bnds;
+ if (bnds < 0xff) { /* do not add if at top of 4G */
+ memsize = (bnds + 1) << 4; /* assume ordered bnds */
+ }
+ }
+ if (ddr->cs2_config & 0x80000000) {
+ debug(" cs2 already configured, bnds=%x\n",ddr->cs2_bnds);
+ bnds = 0xfff & ddr->cs2_bnds;
+ if (bnds < 0xff) { /* do not add if at top of 4G */
+ memsize = (bnds + 1) << 4;
+ }
+ }
+ if (ddr->cs3_config & 0x80000000) {
+ debug(" cs3 already configured, bnds=%x\n",ddr->cs3_bnds);
+ bnds = 0xfff & ddr->cs3_bnds;
+ if (bnds < 0xff) { /* do not add if at top of 4G */
+ memsize = (bnds + 1) << 4;
+ }
+ }
+
+ if (memsize) {
+ printf(" Reusing current %dMB configuration\n",memsize);
+ memsize = setup_laws_and_tlbs(memsize);
+ return memsize << 20;
+ }
/*
* Read SPD information.
return 0;
}
+#ifdef CONFIG_MPC8548
/*
- * Adjust DDR II IO voltage biasing. It just makes it work.
+ * Adjust DDR II IO voltage biasing.
+ * Only 8548 rev 1 needs the fix
*/
- if (spd.mem_type == SPD_MEMTYPE_DDR2) {
- gur->ddrioovcr = (0
- | 0x80000000 /* Enable */
- | 0x10000000 /* VSEL to 1.8V */
- );
+ if ((SVR_SOC_VER(get_svr()) == SVR_8548_E) &&
+ (SVR_MJREV(get_svr()) == 1) &&
+ (spd.mem_type == SPD_MEMTYPE_DDR2)) {
+ volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR);
+ gur->ddrioovcr = (0x80000000 /* Enable */
+ | 0x10000000);/* VSEL to 1.8V */
}
+#endif
/*
* Determine the size of each Rank in bytes.
#endif
}
+ ba_bits = 0;
+ if (spd.nbanks == 0x8)
+ ba_bits = 1;
+
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("\n");
* Adjust the CAS Latency to allow for bus speeds that
* are slower than the DDR module.
*/
- busfreq = get_bus_freq(0) / 1000000; /* MHz */
+ busfreq = get_ddr_freq(0) / 1000000; /* MHz */
effective_data_rate = max_data_rate;
if (busfreq < 90) {
*/
cpo = 0;
if (spd.mem_type == SPD_MEMTYPE_DDR2) {
- if (effective_data_rate == 266 || effective_data_rate == 333) {
+ if (effective_data_rate <= 333) {
cpo = 0x7; /* READ_LAT + 5/4 */
- } else if (effective_data_rate == 400) {
- cpo = 0x9; /* READ_LAT + 7/4 */
} else {
- /* Pure speculation */
- cpo = 0xb;
+ cpo = 0x9; /* READ_LAT + 7/4 */
}
}
ddr->sdram_mode_2 = 0;
debug("DDR: sdram_mode_2 = 0x%08x\n", ddr->sdram_mode_2);
-
/*
- * 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.
+ * Determine Refresh Rate.
*/
- {
- unsigned int refresh_clk;
- 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 */
- };
+ refresh_clk = determine_refresh_rate(spd.refresh & 0x7);
- refresh_clk = picos_to_clk(refresh_time_ns[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);
- }
+ /*
+ * 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)
+#ifdef CONFIG_DDR_ECC
if (spd.config == 0x02) {
+#ifndef CONFIG_ECC_INIT_VIA_DDRCONTROLLER
ddr->err_disable = 0x0000000d;
+#endif
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
+#endif /* CONFIG_DDR_ECC */
asm("sync;isync;msync");
udelay(500);
#ifdef MPC85xx_DDR_SDRAM_CLK_CNTL
- {
- unsigned char clk_adjust;
-
- /*
- * 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;
- }
+ /*
+ * 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
+#ifdef CONFIG_MPC8568
+ /* Empirally setting clk_adjust */
+ clk_adjust = 0x6;
+#else
+ clk_adjust = 0x7;
+#endif
- ddr->sdram_clk_cntl = (0
+ ddr->sdram_clk_cntl = (0
| 0x80000000
| (clk_adjust << 23)
);
- debug("DDR: sdram_clk_cntl = 0x%08x\n", ddr->sdram_clk_cntl);
- }
+ debug("DDR: sdram_clk_cntl = 0x%08x\n", ddr->sdram_clk_cntl);
#endif
/*
static unsigned int
setup_laws_and_tlbs(unsigned int memsize)
{
- volatile immap_t *immap = (immap_t *)CFG_IMMR;
- volatile ccsr_local_ecm_t *ecm = &immap->im_local_ecm;
unsigned int tlb_size;
unsigned int law_size;
unsigned int ram_tlb_index;
break;
case 256:
case 512:
+ tlb_size = BOOKE_PAGESZ_256M;
+ break;
case 1024:
case 2048:
- tlb_size = BOOKE_PAGESZ_256M;
+ if (PVR_VER(get_pvr()) > PVR_VER(PVR_85xx))
+ tlb_size = BOOKE_PAGESZ_1G;
+ else
+ tlb_size = BOOKE_PAGESZ_256M;
break;
default:
puts("DDR: only 16M,32M,64M,128M,256M,512M,1G and 2G are supported.\n");
/*
* The memory was not able to be mapped.
+ * Default to a small size.
*/
- return 0;
+ tlb_size = BOOKE_PAGESZ_64M;
+ memsize=64;
break;
}
ram_tlb_address = (unsigned int)CFG_DDR_SDRAM_BASE;
while (ram_tlb_address < (memsize * 1024 * 1024)
&& ram_tlb_index < 16) {
- mtspr(MAS0, TLB1_MAS0(1, ram_tlb_index, 0));
- mtspr(MAS1, TLB1_MAS1(1, 1, 0, 0, tlb_size));
- mtspr(MAS2, TLB1_MAS2(E500_TLB_EPN(ram_tlb_address),
- 0, 0, 0, 0, 0, 0, 0, 0));
- mtspr(MAS3, TLB1_MAS3(E500_TLB_RPN(ram_tlb_address),
- 0, 0, 0, 0, 0, 1, 0, 1, 0, 1));
- asm volatile("isync;msync;tlbwe;isync");
-
- debug("DDR: MAS0=0x%08x\n", TLB1_MAS0(1, ram_tlb_index, 0));
- debug("DDR: MAS1=0x%08x\n", TLB1_MAS1(1, 1, 0, 0, tlb_size));
- debug("DDR: MAS2=0x%08x\n",
- TLB1_MAS2(E500_TLB_EPN(ram_tlb_address),
- 0, 0, 0, 0, 0, 0, 0, 0));
- debug("DDR: MAS3=0x%08x\n",
- TLB1_MAS3(E500_TLB_RPN(ram_tlb_address),
- 0, 0, 0, 0, 0, 1, 0, 1, 0, 1));
+ set_tlb(1, ram_tlb_address, ram_tlb_address,
+ MAS3_SX|MAS3_SW|MAS3_SR, 0,
+ 0, ram_tlb_index, tlb_size, 1);
ram_tlb_address += (0x1000 << ((tlb_size - 1) * 2));
ram_tlb_index++;
/*
* Set up LAWBAR for all of DDR.
*/
- ecm->lawbar1 = ((CFG_DDR_SDRAM_BASE >> 12) & 0xfffff);
- ecm->lawar1 = (LAWAR_EN
- | LAWAR_TRGT_IF_DDR
- | (LAWAR_SIZE & law_size));
- debug("DDR: LAWBAR1=0x%08x\n", ecm->lawbar1);
- debug("DDR: LARAR1=0x%08x\n", ecm->lawar1);
+
+#ifdef CONFIG_FSL_LAW
+ set_law(1, CFG_DDR_SDRAM_BASE, law_size, LAW_TRGT_IF_DDR);
+#endif
/*
* Confirm that the requested amount of memory was mapped.
{
uint *p = 0;
uint i = 0;
- volatile immap_t *immap = (immap_t *)CFG_IMMR;
- volatile ccsr_ddr_t *ddr= &immap->im_ddr;
+ volatile ccsr_ddr_t *ddr= (void *)(CFG_MPC85xx_DDR_ADDR);
dma_init();
}
}
- /* 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 *)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);
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