34e026f9b1
Mostly reusing DDR3 driver, this patch adds DDR4 SPD handling, register calculation and programming. Signed-off-by: York Sun <yorksun@freescale.com>
293 lines
6.9 KiB
C
293 lines
6.9 KiB
C
/*
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* Copyright 2008-2014 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* Version 2 as published by the Free Software Foundation.
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*/
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#include <common.h>
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#ifdef CONFIG_PPC
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#include <asm/fsl_law.h>
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#endif
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#include <div64.h>
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#include <fsl_ddr.h>
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#include <fsl_immap.h>
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#include <asm/io.h>
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/* To avoid 64-bit full-divides, we factor this here */
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#define ULL_2E12 2000000000000ULL
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#define UL_5POW12 244140625UL
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#define UL_2POW13 (1UL << 13)
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#define ULL_8FS 0xFFFFFFFFULL
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u32 fsl_ddr_get_version(void)
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{
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struct ccsr_ddr __iomem *ddr;
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u32 ver_major_minor_errata;
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ddr = (void *)_DDR_ADDR;
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ver_major_minor_errata = (ddr_in32(&ddr->ip_rev1) & 0xFFFF) << 8;
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ver_major_minor_errata |= (ddr_in32(&ddr->ip_rev2) & 0xFF00) >> 8;
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return ver_major_minor_errata;
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}
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/*
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* Round up mclk_ps to nearest 1 ps in memory controller code
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* if the error is 0.5ps or more.
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*
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* If an imprecise data rate is too high due to rounding error
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* propagation, compute a suitably rounded mclk_ps to compute
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* a working memory controller configuration.
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*/
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unsigned int get_memory_clk_period_ps(void)
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{
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unsigned int data_rate = get_ddr_freq(0);
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unsigned int result;
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/* Round to nearest 10ps, being careful about 64-bit multiply/divide */
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unsigned long long rem, mclk_ps = ULL_2E12;
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/* Now perform the big divide, the result fits in 32-bits */
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rem = do_div(mclk_ps, data_rate);
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result = (rem >= (data_rate >> 1)) ? mclk_ps + 1 : mclk_ps;
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return result;
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}
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/* Convert picoseconds into DRAM clock cycles (rounding up if needed). */
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unsigned int picos_to_mclk(unsigned int picos)
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{
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unsigned long long clks, clks_rem;
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unsigned long data_rate = get_ddr_freq(0);
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/* Short circuit for zero picos */
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if (!picos)
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return 0;
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/* First multiply the time by the data rate (32x32 => 64) */
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clks = picos * (unsigned long long)data_rate;
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/*
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* Now divide by 5^12 and track the 32-bit remainder, then divide
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* by 2*(2^12) using shifts (and updating the remainder).
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*/
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clks_rem = do_div(clks, UL_5POW12);
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clks_rem += (clks & (UL_2POW13-1)) * UL_5POW12;
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clks >>= 13;
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/* If we had a remainder greater than the 1ps error, then round up */
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if (clks_rem > data_rate)
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clks++;
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/* Clamp to the maximum representable value */
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if (clks > ULL_8FS)
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clks = ULL_8FS;
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return (unsigned int) clks;
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}
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unsigned int mclk_to_picos(unsigned int mclk)
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{
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return get_memory_clk_period_ps() * mclk;
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}
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#ifdef CONFIG_PPC
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void
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__fsl_ddr_set_lawbar(const common_timing_params_t *memctl_common_params,
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unsigned int law_memctl,
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unsigned int ctrl_num)
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{
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unsigned long long base = memctl_common_params->base_address;
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unsigned long long size = memctl_common_params->total_mem;
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/*
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* If no DIMMs on this controller, do not proceed any further.
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*/
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if (!memctl_common_params->ndimms_present) {
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return;
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}
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#if !defined(CONFIG_PHYS_64BIT)
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if (base >= CONFIG_MAX_MEM_MAPPED)
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return;
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if ((base + size) >= CONFIG_MAX_MEM_MAPPED)
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size = CONFIG_MAX_MEM_MAPPED - base;
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#endif
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if (set_ddr_laws(base, size, law_memctl) < 0) {
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printf("%s: ERROR (ctrl #%d, TRGT ID=%x)\n", __func__, ctrl_num,
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law_memctl);
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return ;
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}
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debug("setup ddr law base = 0x%llx, size 0x%llx, TRGT_ID 0x%x\n",
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base, size, law_memctl);
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}
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__attribute__((weak, alias("__fsl_ddr_set_lawbar"))) void
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fsl_ddr_set_lawbar(const common_timing_params_t *memctl_common_params,
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unsigned int memctl_interleaved,
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unsigned int ctrl_num);
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#endif
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void fsl_ddr_set_intl3r(const unsigned int granule_size)
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{
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#ifdef CONFIG_E6500
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u32 *mcintl3r = (void *) (CONFIG_SYS_IMMR + 0x18004);
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*mcintl3r = 0x80000000 | (granule_size & 0x1f);
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debug("Enable MCINTL3R with granule size 0x%x\n", granule_size);
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#endif
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}
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u32 fsl_ddr_get_intl3r(void)
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{
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u32 val = 0;
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#ifdef CONFIG_E6500
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u32 *mcintl3r = (void *) (CONFIG_SYS_IMMR + 0x18004);
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val = *mcintl3r;
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#endif
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return val;
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}
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void board_add_ram_info(int use_default)
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{
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struct ccsr_ddr __iomem *ddr =
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(struct ccsr_ddr __iomem *)(CONFIG_SYS_FSL_DDR_ADDR);
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#if defined(CONFIG_E6500) && (CONFIG_NUM_DDR_CONTROLLERS == 3)
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u32 *mcintl3r = (void *) (CONFIG_SYS_IMMR + 0x18004);
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#endif
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#if (CONFIG_NUM_DDR_CONTROLLERS > 1)
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uint32_t cs0_config = ddr_in32(&ddr->cs0_config);
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#endif
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uint32_t sdram_cfg = ddr_in32(&ddr->sdram_cfg);
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int cas_lat;
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#if CONFIG_NUM_DDR_CONTROLLERS >= 2
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if (!(sdram_cfg & SDRAM_CFG_MEM_EN)) {
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ddr = (void __iomem *)CONFIG_SYS_FSL_DDR2_ADDR;
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sdram_cfg = ddr_in32(&ddr->sdram_cfg);
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}
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#endif
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#if CONFIG_NUM_DDR_CONTROLLERS >= 3
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if (!(sdram_cfg & SDRAM_CFG_MEM_EN)) {
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ddr = (void __iomem *)CONFIG_SYS_FSL_DDR3_ADDR;
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sdram_cfg = ddr_in32(&ddr->sdram_cfg);
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}
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#endif
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puts(" (DDR");
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switch ((sdram_cfg & SDRAM_CFG_SDRAM_TYPE_MASK) >>
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SDRAM_CFG_SDRAM_TYPE_SHIFT) {
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case SDRAM_TYPE_DDR1:
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puts("1");
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break;
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case SDRAM_TYPE_DDR2:
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puts("2");
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break;
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case SDRAM_TYPE_DDR3:
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puts("3");
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break;
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case SDRAM_TYPE_DDR4:
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puts("4");
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break;
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default:
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puts("?");
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break;
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}
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if (sdram_cfg & SDRAM_CFG_32_BE)
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puts(", 32-bit");
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else if (sdram_cfg & SDRAM_CFG_16_BE)
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puts(", 16-bit");
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else
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puts(", 64-bit");
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/* Calculate CAS latency based on timing cfg values */
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cas_lat = ((ddr_in32(&ddr->timing_cfg_1) >> 16) & 0xf);
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if (fsl_ddr_get_version() <= 0x40400)
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cas_lat += 1;
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else
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cas_lat += 2;
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cas_lat += ((ddr_in32(&ddr->timing_cfg_3) >> 12) & 3) << 4;
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printf(", CL=%d", cas_lat >> 1);
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if (cas_lat & 0x1)
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puts(".5");
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if (sdram_cfg & SDRAM_CFG_ECC_EN)
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puts(", ECC on)");
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else
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puts(", ECC off)");
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#if (CONFIG_NUM_DDR_CONTROLLERS == 3)
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#ifdef CONFIG_E6500
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if (*mcintl3r & 0x80000000) {
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puts("\n");
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puts(" DDR Controller Interleaving Mode: ");
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switch (*mcintl3r & 0x1f) {
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case FSL_DDR_3WAY_1KB_INTERLEAVING:
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puts("3-way 1KB");
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break;
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case FSL_DDR_3WAY_4KB_INTERLEAVING:
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puts("3-way 4KB");
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break;
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case FSL_DDR_3WAY_8KB_INTERLEAVING:
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puts("3-way 8KB");
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break;
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default:
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puts("3-way UNKNOWN");
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break;
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}
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}
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#endif
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#endif
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#if (CONFIG_NUM_DDR_CONTROLLERS >= 2)
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if (cs0_config & 0x20000000) {
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puts("\n");
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puts(" DDR Controller Interleaving Mode: ");
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switch ((cs0_config >> 24) & 0xf) {
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case FSL_DDR_256B_INTERLEAVING:
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puts("256B");
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break;
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case FSL_DDR_CACHE_LINE_INTERLEAVING:
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puts("cache line");
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break;
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case FSL_DDR_PAGE_INTERLEAVING:
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puts("page");
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break;
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case FSL_DDR_BANK_INTERLEAVING:
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puts("bank");
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break;
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case FSL_DDR_SUPERBANK_INTERLEAVING:
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puts("super-bank");
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break;
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default:
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puts("invalid");
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break;
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}
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}
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#endif
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if ((sdram_cfg >> 8) & 0x7f) {
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puts("\n");
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puts(" DDR Chip-Select Interleaving Mode: ");
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switch(sdram_cfg >> 8 & 0x7f) {
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case FSL_DDR_CS0_CS1_CS2_CS3:
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puts("CS0+CS1+CS2+CS3");
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break;
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case FSL_DDR_CS0_CS1:
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puts("CS0+CS1");
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break;
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case FSL_DDR_CS2_CS3:
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puts("CS2+CS3");
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break;
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case FSL_DDR_CS0_CS1_AND_CS2_CS3:
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puts("CS0+CS1 and CS2+CS3");
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break;
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default:
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puts("invalid");
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break;
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}
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}
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}
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