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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2008
* Sergei Poselenov, Emcraft Systems, sposelenov@emcraft.com.
*/
#include <config.h>
#include <init.h>
#include <asm/processor.h>
#include <asm/immap_85xx.h>
#include <fsl_ddr_sdram.h>
#include <asm/processor.h>
#include <asm/mmu.h>
#include <spd_sdram.h>
#include <linux/delay.h>
#if !defined(CONFIG_SPD_EEPROM)
/*
* Autodetect onboard DDR SDRAM on 85xx platforms
*
* NOTE: Some of the hardcoded values are hardware dependant,
* so this should be extended for other future boards
* using this routine!
*/
phys_size_t fixed_sdram(void)
{
struct ccsr_ddr __iomem *ddr =
(struct ccsr_ddr __iomem *)(CFG_SYS_FSL_DDR_ADDR);
/*
* Disable memory controller.
*/
ddr->cs0_config = 0;
ddr->sdram_cfg = 0;
ddr->cs0_bnds = CFG_SYS_DDR_CS0_BNDS;
ddr->cs0_config = CFG_SYS_DDR_CS0_CONFIG;
ddr->timing_cfg_0 = CFG_SYS_DDR_TIMING_0;
ddr->timing_cfg_1 = CFG_SYS_DDR_TIMING_1;
ddr->timing_cfg_2 = CFG_SYS_DDR_TIMING_2;
ddr->sdram_mode = CFG_SYS_DDR_MODE;
ddr->sdram_interval = CFG_SYS_DDR_INTERVAL;
ddr->sdram_cfg_2 = CFG_SYS_DDR_CONFIG_2;
ddr->sdram_clk_cntl = CFG_SYS_DDR_CLK_CONTROL;
asm ("sync;isync;msync");
udelay(1000);
ddr->sdram_cfg = CFG_SYS_DDR_CONFIG;
asm ("sync; isync; msync");
udelay(1000);
if (get_ram_size(0, CFG_SYS_SDRAM_SIZE<<20) == CFG_SYS_SDRAM_SIZE<<20) {
/*
* OK, size detected -> all done
*/
return CFG_SYS_SDRAM_SIZE<<20;
}
return 0; /* nothing found ! */
}
#endif
#if defined(CFG_SYS_DRAM_TEST)
int testdram(void)
{
uint *pstart = (uint *) CONFIG_SYS_MEMTEST_START;
uint *pend = (uint *) CONFIG_SYS_MEMTEST_END;
uint *p;
printf ("SDRAM test phase 1:\n");
for (p = pstart; p < pend; p++)
*p = 0xaaaaaaaa;
for (p = pstart; p < pend; p++) {
if (*p != 0xaaaaaaaa) {
printf ("SDRAM test fails at: %08x\n", (uint) p);
return 1;
}
}
printf ("SDRAM test phase 2:\n");
for (p = pstart; p < pend; p++)
*p = 0x55555555;
for (p = pstart; p < pend; p++) {
if (*p != 0x55555555) {
printf ("SDRAM test fails at: %08x\n", (uint) p);
return 1;
}
}
printf ("SDRAM test passed.\n");
return 0;
}
#endif
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