diff options
Diffstat (limited to 'board/barco/platinum/spl_picon.c')
| -rw-r--r-- | board/barco/platinum/spl_picon.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/board/barco/platinum/spl_picon.c b/board/barco/platinum/spl_picon.c new file mode 100644 index 0000000..f421c21 --- /dev/null +++ b/board/barco/platinum/spl_picon.c @@ -0,0 +1,182 @@ +/* + * 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); +} |