x86: quark: Add Memory Reference Code (MRC) main routines
Add the main routines for Quark Memory Reference Code (MRC).
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/cpu/quark/mrc.c b/arch/x86/cpu/quark/mrc.c
new file mode 100644
index 0000000..7eb34c5
--- /dev/null
+++ b/arch/x86/cpu/quark/mrc.c
@@ -0,0 +1,204 @@
+/*
+ * Copyright (C) 2013, Intel Corporation
+ * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * Ported from Intel released Quark UEFI BIOS
+ * QuarkSocPkg/QuarkNorthCluster/MemoryInit/Pei
+ *
+ * SPDX-License-Identifier: Intel
+ */
+
+/*
+ * This is the main Quark Memory Reference Code (MRC)
+ *
+ * These functions are generic and should work for any Quark-based board.
+ *
+ * MRC requires two data structures to be passed in which are initialized by
+ * mrc_adjust_params().
+ *
+ * The basic flow is as follows:
+ * 01) Check for supported DDR speed configuration
+ * 02) Set up Memory Manager buffer as pass-through (POR)
+ * 03) Set Channel Interleaving Mode and Channel Stride to the most aggressive
+ * setting possible
+ * 04) Set up the Memory Controller logic
+ * 05) Set up the DDR_PHY logic
+ * 06) Initialise the DRAMs (JEDEC)
+ * 07) Perform the Receive Enable Calibration algorithm
+ * 08) Perform the Write Leveling algorithm
+ * 09) Perform the Read Training algorithm (includes internal Vref)
+ * 10) Perform the Write Training algorithm
+ * 11) Set Channel Interleaving Mode and Channel Stride to the desired settings
+ *
+ * DRAM unit configuration based on Valleyview MRC.
+ */
+
+#include <common.h>
+#include <asm/arch/mrc.h>
+#include <asm/arch/msg_port.h>
+#include "mrc_util.h"
+#include "smc.h"
+
+static const struct mem_init init[] = {
+ { 0x0101, BM_COLD | BM_FAST | BM_WARM | BM_S3, clear_self_refresh },
+ { 0x0200, BM_COLD | BM_FAST | BM_WARM | BM_S3, prog_ddr_timing_control },
+ { 0x0103, BM_COLD | BM_FAST , prog_decode_before_jedec },
+ { 0x0104, BM_COLD | BM_FAST , perform_ddr_reset },
+ { 0x0300, BM_COLD | BM_FAST | BM_S3, ddrphy_init },
+ { 0x0400, BM_COLD | BM_FAST , perform_jedec_init },
+ { 0x0105, BM_COLD | BM_FAST , set_ddr_init_complete },
+ { 0x0106, BM_FAST | BM_WARM | BM_S3, restore_timings },
+ { 0x0106, BM_COLD , default_timings },
+ { 0x0500, BM_COLD , rcvn_cal },
+ { 0x0600, BM_COLD , wr_level },
+ { 0x0120, BM_COLD , prog_page_ctrl },
+ { 0x0700, BM_COLD , rd_train },
+ { 0x0800, BM_COLD , wr_train },
+ { 0x010b, BM_COLD , store_timings },
+ { 0x010c, BM_COLD | BM_FAST | BM_WARM | BM_S3, enable_scrambling },
+ { 0x010d, BM_COLD | BM_FAST | BM_WARM | BM_S3, prog_ddr_control },
+ { 0x010e, BM_COLD | BM_FAST | BM_WARM | BM_S3, prog_dra_drb },
+ { 0x010f, BM_WARM | BM_S3, perform_wake },
+ { 0x0110, BM_COLD | BM_FAST | BM_WARM | BM_S3, change_refresh_period },
+ { 0x0111, BM_COLD | BM_FAST | BM_WARM | BM_S3, set_auto_refresh },
+ { 0x0112, BM_COLD | BM_FAST | BM_WARM | BM_S3, ecc_enable },
+ { 0x0113, BM_COLD | BM_FAST , memory_test },
+ { 0x0114, BM_COLD | BM_FAST | BM_WARM | BM_S3, lock_registers }
+};
+
+/* Adjust configuration parameters before initialization sequence */
+static void mrc_adjust_params(struct mrc_params *mrc_params)
+{
+ const struct dram_params *dram_params;
+ uint8_t dram_width;
+ uint32_t rank_enables;
+ uint32_t channel_width;
+
+ ENTERFN();
+
+ /* initially expect success */
+ mrc_params->status = MRC_SUCCESS;
+
+ dram_width = mrc_params->dram_width;
+ rank_enables = mrc_params->rank_enables;
+ channel_width = mrc_params->channel_width;
+
+ /*
+ * Setup board layout (must be reviewed as is selecting static timings)
+ * 0 == R0 (DDR3 x16), 1 == R1 (DDR3 x16),
+ * 2 == DV (DDR3 x8), 3 == SV (DDR3 x8).
+ */
+ if (dram_width == X8)
+ mrc_params->board_id = 2; /* select x8 layout */
+ else
+ mrc_params->board_id = 0; /* select x16 layout */
+
+ /* initially no memory */
+ mrc_params->mem_size = 0;
+
+ /* begin of channel settings */
+ dram_params = &mrc_params->params;
+
+ /*
+ * Determine column bits:
+ *
+ * Column: 11 for 8Gbx8, else 10
+ */
+ mrc_params->column_bits[0] =
+ ((dram_params[0].density == 4) &&
+ (dram_width == X8)) ? (11) : (10);
+
+ /*
+ * Determine row bits:
+ *
+ * 512Mbx16=12 512Mbx8=13
+ * 1Gbx16=13 1Gbx8=14
+ * 2Gbx16=14 2Gbx8=15
+ * 4Gbx16=15 4Gbx8=16
+ * 8Gbx16=16 8Gbx8=16
+ */
+ mrc_params->row_bits[0] = 12 + (dram_params[0].density) +
+ (((dram_params[0].density < 4) &&
+ (dram_width == X8)) ? (1) : (0));
+
+ /*
+ * Determine per-channel memory size:
+ *
+ * (For 2 RANKs, multiply by 2)
+ * (For 16 bit data bus, divide by 2)
+ *
+ * DENSITY WIDTH MEM_AVAILABLE
+ * 512Mb x16 0x008000000 ( 128MB)
+ * 512Mb x8 0x010000000 ( 256MB)
+ * 1Gb x16 0x010000000 ( 256MB)
+ * 1Gb x8 0x020000000 ( 512MB)
+ * 2Gb x16 0x020000000 ( 512MB)
+ * 2Gb x8 0x040000000 (1024MB)
+ * 4Gb x16 0x040000000 (1024MB)
+ * 4Gb x8 0x080000000 (2048MB)
+ */
+ mrc_params->channel_size[0] = (1 << dram_params[0].density);
+ mrc_params->channel_size[0] *= (dram_width == X8) ? 2 : 1;
+ mrc_params->channel_size[0] *= (rank_enables == 0x3) ? 2 : 1;
+ mrc_params->channel_size[0] *= (channel_width == X16) ? 1 : 2;
+
+ /* Determine memory size (convert number of 64MB/512Mb units) */
+ mrc_params->mem_size += mrc_params->channel_size[0] << 26;
+
+ LEAVEFN();
+}
+
+static void mrc_mem_init(struct mrc_params *mrc_params)
+{
+ int i;
+
+ ENTERFN();
+
+ /* MRC started */
+ mrc_post_code(0x01, 0x00);
+
+ if (mrc_params->boot_mode != BM_COLD) {
+ if (mrc_params->ddr_speed != mrc_params->timings.ddr_speed) {
+ /* full training required as frequency changed */
+ mrc_params->boot_mode = BM_COLD;
+ }
+ }
+
+ for (i = 0; i < ARRAY_SIZE(init); i++) {
+ uint64_t my_tsc;
+
+ if (mrc_params->boot_mode & init[i].boot_path) {
+ uint8_t major = init[i].post_code >> 8 & 0xff;
+ uint8_t minor = init[i].post_code >> 0 & 0xff;
+ mrc_post_code(major, minor);
+
+ my_tsc = rdtsc();
+ init[i].init_fn(mrc_params);
+ DPF(D_TIME, "Execution time %llx", rdtsc() - my_tsc);
+ }
+ }
+
+ /* display the timings */
+ print_timings(mrc_params);
+
+ /* MRC complete */
+ mrc_post_code(0x01, 0xff);
+
+ LEAVEFN();
+}
+
+void mrc_init(struct mrc_params *mrc_params)
+{
+ ENTERFN();
+
+ DPF(D_INFO, "MRC Version %04x %s %s\n", MRC_VERSION,
+ __DATE__, __TIME__);
+
+ /* Set up the data structures used by mrc_mem_init() */
+ mrc_adjust_params(mrc_params);
+
+ /* Initialize system memory */
+ mrc_mem_init(mrc_params);
+
+ LEAVEFN();
+}