205 lines
6.4 KiB
C
205 lines
6.4 KiB
C
// SPDX-License-Identifier: Intel
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/*
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* Copyright (C) 2013, Intel Corporation
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* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
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*
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* Ported from Intel released Quark UEFI BIOS
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* QuarkSocPkg/QuarkNorthCluster/MemoryInit/Pei
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*/
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/*
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* This is the main Quark Memory Reference Code (MRC)
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*
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* These functions are generic and should work for any Quark-based board.
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*
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* MRC requires two data structures to be passed in which are initialized by
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* mrc_adjust_params().
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*
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* The basic flow is as follows:
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* 01) Check for supported DDR speed configuration
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* 02) Set up Memory Manager buffer as pass-through (POR)
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* 03) Set Channel Interleaving Mode and Channel Stride to the most aggressive
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* setting possible
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* 04) Set up the Memory Controller logic
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* 05) Set up the DDR_PHY logic
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* 06) Initialise the DRAMs (JEDEC)
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* 07) Perform the Receive Enable Calibration algorithm
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* 08) Perform the Write Leveling algorithm
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* 09) Perform the Read Training algorithm (includes internal Vref)
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* 10) Perform the Write Training algorithm
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* 11) Set Channel Interleaving Mode and Channel Stride to the desired settings
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*
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* DRAM unit configuration based on Valleyview MRC.
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*/
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#include <common.h>
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#include <version.h>
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#include <asm/arch/mrc.h>
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#include <asm/arch/msg_port.h>
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#include "mrc_util.h"
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#include "smc.h"
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static const struct mem_init init[] = {
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{ 0x0101, BM_COLD | BM_FAST | BM_WARM | BM_S3, clear_self_refresh },
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{ 0x0200, BM_COLD | BM_FAST | BM_WARM | BM_S3, prog_ddr_timing_control },
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{ 0x0103, BM_COLD | BM_FAST , prog_decode_before_jedec },
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{ 0x0104, BM_COLD | BM_FAST , perform_ddr_reset },
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{ 0x0300, BM_COLD | BM_FAST | BM_S3, ddrphy_init },
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{ 0x0400, BM_COLD | BM_FAST , perform_jedec_init },
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{ 0x0105, BM_COLD | BM_FAST , set_ddr_init_complete },
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{ 0x0106, BM_FAST | BM_WARM | BM_S3, restore_timings },
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{ 0x0106, BM_COLD , default_timings },
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{ 0x0500, BM_COLD , rcvn_cal },
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{ 0x0600, BM_COLD , wr_level },
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{ 0x0120, BM_COLD , prog_page_ctrl },
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{ 0x0700, BM_COLD , rd_train },
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{ 0x0800, BM_COLD , wr_train },
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{ 0x010b, BM_COLD , store_timings },
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{ 0x010c, BM_COLD | BM_FAST | BM_WARM | BM_S3, enable_scrambling },
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{ 0x010d, BM_COLD | BM_FAST | BM_WARM | BM_S3, prog_ddr_control },
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{ 0x010e, BM_COLD | BM_FAST | BM_WARM | BM_S3, prog_dra_drb },
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{ 0x010f, BM_WARM | BM_S3, perform_wake },
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{ 0x0110, BM_COLD | BM_FAST | BM_WARM | BM_S3, change_refresh_period },
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{ 0x0111, BM_COLD | BM_FAST | BM_WARM | BM_S3, set_auto_refresh },
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{ 0x0112, BM_COLD | BM_FAST | BM_WARM | BM_S3, ecc_enable },
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{ 0x0113, BM_COLD | BM_FAST , memory_test },
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{ 0x0114, BM_COLD | BM_FAST | BM_WARM | BM_S3, lock_registers }
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};
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/* Adjust configuration parameters before initialization sequence */
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static void mrc_adjust_params(struct mrc_params *mrc_params)
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{
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const struct dram_params *dram_params;
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uint8_t dram_width;
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uint32_t rank_enables;
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uint32_t channel_width;
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ENTERFN();
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/* initially expect success */
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mrc_params->status = MRC_SUCCESS;
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dram_width = mrc_params->dram_width;
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rank_enables = mrc_params->rank_enables;
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channel_width = mrc_params->channel_width;
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/*
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* Setup board layout (must be reviewed as is selecting static timings)
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* 0 == R0 (DDR3 x16), 1 == R1 (DDR3 x16),
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* 2 == DV (DDR3 x8), 3 == SV (DDR3 x8).
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*/
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if (dram_width == X8)
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mrc_params->board_id = 2; /* select x8 layout */
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else
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mrc_params->board_id = 0; /* select x16 layout */
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/* initially no memory */
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mrc_params->mem_size = 0;
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/* begin of channel settings */
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dram_params = &mrc_params->params;
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/*
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* Determine column bits:
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*
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* Column: 11 for 8Gbx8, else 10
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*/
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mrc_params->column_bits[0] =
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(dram_params[0].density == 4) &&
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(dram_width == X8) ? 11 : 10;
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/*
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* Determine row bits:
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*
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* 512Mbx16=12 512Mbx8=13
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* 1Gbx16=13 1Gbx8=14
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* 2Gbx16=14 2Gbx8=15
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* 4Gbx16=15 4Gbx8=16
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* 8Gbx16=16 8Gbx8=16
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*/
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mrc_params->row_bits[0] = 12 + dram_params[0].density +
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(dram_params[0].density < 4) &&
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(dram_width == X8) ? 1 : 0;
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/*
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* Determine per-channel memory size:
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*
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* (For 2 RANKs, multiply by 2)
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* (For 16 bit data bus, divide by 2)
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*
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* DENSITY WIDTH MEM_AVAILABLE
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* 512Mb x16 0x008000000 ( 128MB)
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* 512Mb x8 0x010000000 ( 256MB)
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* 1Gb x16 0x010000000 ( 256MB)
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* 1Gb x8 0x020000000 ( 512MB)
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* 2Gb x16 0x020000000 ( 512MB)
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* 2Gb x8 0x040000000 (1024MB)
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* 4Gb x16 0x040000000 (1024MB)
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* 4Gb x8 0x080000000 (2048MB)
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*/
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mrc_params->channel_size[0] = 1 << dram_params[0].density;
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mrc_params->channel_size[0] *= (dram_width == X8) ? 2 : 1;
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mrc_params->channel_size[0] *= (rank_enables == 0x3) ? 2 : 1;
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mrc_params->channel_size[0] *= (channel_width == X16) ? 1 : 2;
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/* Determine memory size (convert number of 64MB/512Mb units) */
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mrc_params->mem_size += mrc_params->channel_size[0] << 26;
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LEAVEFN();
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}
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static void mrc_mem_init(struct mrc_params *mrc_params)
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{
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int i;
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ENTERFN();
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/* MRC started */
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mrc_post_code(0x01, 0x00);
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if (mrc_params->boot_mode != BM_COLD) {
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if (mrc_params->ddr_speed != mrc_params->timings.ddr_speed) {
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/* full training required as frequency changed */
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mrc_params->boot_mode = BM_COLD;
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}
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}
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for (i = 0; i < ARRAY_SIZE(init); i++) {
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uint64_t my_tsc;
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if (mrc_params->boot_mode & init[i].boot_path) {
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uint8_t major = init[i].post_code >> 8 & 0xff;
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uint8_t minor = init[i].post_code >> 0 & 0xff;
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mrc_post_code(major, minor);
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my_tsc = rdtsc();
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init[i].init_fn(mrc_params);
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DPF(D_TIME, "Execution time %llx", rdtsc() - my_tsc);
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}
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}
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/* display the timings */
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print_timings(mrc_params);
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/* MRC complete */
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mrc_post_code(0x01, 0xff);
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LEAVEFN();
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}
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void mrc_init(struct mrc_params *mrc_params)
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{
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ENTERFN();
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DPF(D_INFO, "MRC Version %04x %s %s\n", MRC_VERSION,
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U_BOOT_DATE, U_BOOT_TIME);
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/* Set up the data structures used by mrc_mem_init() */
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mrc_adjust_params(mrc_params);
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/* Initialize system memory */
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mrc_mem_init(mrc_params);
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LEAVEFN();
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}
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