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-rw-r--r--board/barco/platinum/spl_picon.c182
1 files changed, 182 insertions, 0 deletions
diff --git a/board/barco/platinum/spl_picon.c b/board/barco/platinum/spl_picon.c
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+++ b/board/barco/platinum/spl_picon.c
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+/*
+ * Copyright (C) 2014 Stefan Roese <sr@denx.de>
+ *
+ * Based on: gw_ventana_spl.c which is:
+ * Copyright (C) 2014 Gateworks Corporation
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <asm/io.h>
+#include <asm/arch/iomux.h>
+#include <asm/arch/mx6-ddr.h>
+#include <asm/arch/mx6-pins.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/imx-common/boot_mode.h>
+#include <asm/imx-common/iomux-v3.h>
+#include <asm/imx-common/mxc_i2c.h>
+#include <spl.h>
+
+#include "platinum.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#undef RTT_NOM_120OHM /* use 120ohm Rtt_nom vs 60ohm (lower power) */
+
+/* Configure MX6Q/DUAL mmdc DDR io registers */
+struct mx6sdl_iomux_ddr_regs mx6sdl_ddr_ioregs = {
+ /* SDCLK[0:1], CAS, RAS, Reset: Differential input, 40ohm */
+ .dram_sdclk_0 = 0x00020030,
+ .dram_sdclk_1 = 0x00020030,
+ .dram_cas = 0x00020030,
+ .dram_ras = 0x00020030,
+ .dram_reset = 0x00020030,
+ /* SDCKE[0:1]: 100k pull-up */
+ .dram_sdcke0 = 0x00003000,
+ .dram_sdcke1 = 0x00003000,
+ /* SDBA2: pull-up disabled */
+ .dram_sdba2 = 0x00000000,
+ /* SDODT[0:1]: 100k pull-up, 40 ohm */
+ .dram_sdodt0 = 0x00003030,
+ .dram_sdodt1 = 0x00003030,
+ /* SDQS[0:7]: Differential input, 40 ohm */
+ .dram_sdqs0 = 0x00000030,
+ .dram_sdqs1 = 0x00000030,
+ .dram_sdqs2 = 0x00000030,
+ .dram_sdqs3 = 0x00000030,
+ .dram_sdqs4 = 0x00000030,
+ .dram_sdqs5 = 0x00000030,
+ .dram_sdqs6 = 0x00000030,
+ .dram_sdqs7 = 0x00000030,
+ /* DQM[0:7]: Differential input, 40 ohm */
+ .dram_dqm0 = 0x00020030,
+ .dram_dqm1 = 0x00020030,
+ .dram_dqm2 = 0x00020030,
+ .dram_dqm3 = 0x00020030,
+ .dram_dqm4 = 0x00020030,
+ .dram_dqm5 = 0x00020030,
+ .dram_dqm6 = 0x00020030,
+ .dram_dqm7 = 0x00020030,
+};
+
+/* Configure MX6Q/DUAL mmdc GRP io registers */
+struct mx6sdl_iomux_grp_regs mx6sdl_grp_ioregs = {
+ /* DDR3 */
+ .grp_ddr_type = 0x000c0000,
+ .grp_ddrmode_ctl = 0x00020000,
+ /* disable DDR pullups */
+ .grp_ddrpke = 0x00000000,
+ /* ADDR[00:16], SDBA[0:1]: 40 ohm */
+ .grp_addds = 0x00000030,
+ /* CS0/CS1/SDBA2/CKE0/CKE1/SDWE: 40 ohm */
+ .grp_ctlds = 0x00000030,
+ /* DATA[00:63]: Differential input, 40 ohm */
+ .grp_ddrmode = 0x00020000,
+ .grp_b0ds = 0x00000030,
+ .grp_b1ds = 0x00000030,
+ .grp_b2ds = 0x00000030,
+ .grp_b3ds = 0x00000030,
+ .grp_b4ds = 0x00000030,
+ .grp_b5ds = 0x00000030,
+ .grp_b6ds = 0x00000030,
+ .grp_b7ds = 0x00000030,
+};
+
+/* MT41K256M16HA-125 */
+static struct mx6_ddr3_cfg mt41k256m16ha_125 = {
+ .mem_speed = 1600,
+ .density = 4, /* 4Gbit */
+ .width = 16,
+ .banks = 8,
+ .rowaddr = 15,
+ .coladdr = 10,
+ .pagesz = 2,
+ .trcd = 1375,
+ .trcmin = 4875,
+ .trasmin = 3500,
+};
+
+/*
+ * Values from running the Freescale DDR stress tool via USB
+ */
+static struct mx6_mmdc_calibration mx6dq_mmdc_calib = {
+ /* write leveling calibration determine */
+ .p0_mpwldectrl0 = 0x0044004E,
+ .p0_mpwldectrl1 = 0x001F0023,
+ /* Read DQS Gating calibration */
+ .p0_mpdgctrl0 = 0x02480248,
+ .p0_mpdgctrl1 = 0x0210021C,
+ /* Read Calibration: DQS delay relative to DQ read access */
+ .p0_mprddlctl = 0x42444444,
+ /* Write Calibration: DQ/DM delay relative to DQS write access */
+ .p0_mpwrdlctl = 0x36322C32,
+};
+
+static void spl_dram_init(int width)
+{
+ struct mx6_ddr3_cfg *mem = &mt41k256m16ha_125;
+ struct mx6_ddr_sysinfo sysinfo = {
+ /* width of data bus:0=16,1=32,2=64 */
+ .dsize = width / 32,
+ /* config for full 4GB range so that get_mem_size() works */
+ .cs_density = 32, /* 32Gb per CS */
+ /* single chip select */
+ .ncs = 1,
+ .cs1_mirror = 1,
+ .rtt_wr = 1 /*DDR3_RTT_60_OHM*/, /* RTT_Wr = RZQ/4 */
+#ifdef RTT_NOM_120OHM
+ .rtt_nom = 2 /*DDR3_RTT_120_OHM*/, /* RTT_Nom = RZQ/2 */
+#else
+ .rtt_nom = 1 /*DDR3_RTT_60_OHM*/, /* RTT_Nom = RZQ/4 */
+#endif
+ .walat = 0, /* Write additional latency */
+ .ralat = 5, /* Read additional latency */
+ .mif3_mode = 3, /* Command prediction working mode */
+ .bi_on = 1, /* Bank interleaving enabled */
+ .sde_to_rst = 0x10, /* 14 cycles, 200us (JEDEC default) */
+ .rst_to_cke = 0x23, /* 33 cycles, 500us (JEDEC default) */
+ };
+
+ mx6sdl_dram_iocfg(width, &mx6sdl_ddr_ioregs, &mx6sdl_grp_ioregs);
+ mx6_dram_cfg(&sysinfo, &mx6dq_mmdc_calib, mem);
+}
+
+/*
+ * Called from C runtime startup code (arch/arm/lib/crt0.S:_main)
+ * - we have a stack and a place to store GD, both in SRAM
+ * - no variable global data is available
+ */
+void board_init_f(ulong dummy)
+{
+ /* Setup AIPS and disable watchdog */
+ arch_cpu_init();
+
+ ccgr_init();
+ gpr_init();
+
+ /* UART iomux */
+ board_early_init_f();
+
+ /* Setup GP timer */
+ timer_init();
+
+ /* UART clocks enabled and gd valid - init serial console */
+ preloader_console_init();
+
+ /* Init DDR with 32bit width */
+ spl_dram_init(32);
+
+ /* Clear the BSS */
+ memset(__bss_start, 0, __bss_end - __bss_start);
+
+ /*
+ * Setup enet related MUXing early to give the PHY
+ * some time to wake-up from reset
+ */
+ platinum_setup_enet();
+
+ /* load/boot image from boot device */
+ board_init_r(NULL, 0);
+}