mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-27 04:18:51 +09:00
![Otavio Salvador](/assets/img/avatar_default.png)
Falcon mode boots the kernel directly from SPL, without loading the full U-Boot. As pico-imx6ul does not have a GPIO for selecting Falcon versus normal mode, enter in Falcon mode when the customer selects the CONFIG_SPL_OS_BOOT option in menuconfig. Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
145 lines
3.0 KiB
C
145 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
|
|
#include <asm/arch/clock.h>
|
|
#include <asm/arch/iomux.h>
|
|
#include <asm/arch/imx-regs.h>
|
|
#include <asm/arch/crm_regs.h>
|
|
#include <asm/arch/mx6ul_pins.h>
|
|
#include <asm/arch/mx6-pins.h>
|
|
#include <asm/arch/sys_proto.h>
|
|
#include <asm/gpio.h>
|
|
#include <asm/mach-imx/iomux-v3.h>
|
|
#include <asm/mach-imx/boot_mode.h>
|
|
#include <linux/libfdt.h>
|
|
#include <spl.h>
|
|
|
|
#if defined(CONFIG_SPL_BUILD)
|
|
|
|
#ifdef CONFIG_SPL_OS_BOOT
|
|
int spl_start_uboot(void)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#include <asm/arch/mx6-ddr.h>
|
|
|
|
static struct mx6ul_iomux_grp_regs mx6_grp_ioregs = {
|
|
.grp_addds = 0x00000030,
|
|
.grp_ddrmode_ctl = 0x00020000,
|
|
.grp_b0ds = 0x00000030,
|
|
.grp_ctlds = 0x00000030,
|
|
.grp_b1ds = 0x00000030,
|
|
.grp_ddrpke = 0x00000000,
|
|
.grp_ddrmode = 0x00020000,
|
|
.grp_ddr_type = 0x00080000,
|
|
};
|
|
|
|
static struct mx6ul_iomux_ddr_regs mx6_ddr_ioregs = {
|
|
.dram_dqm0 = 0x00000030,
|
|
.dram_dqm1 = 0x00000030,
|
|
.dram_ras = 0x00000030,
|
|
.dram_cas = 0x00000030,
|
|
.dram_odt0 = 0x00000030,
|
|
.dram_odt1 = 0x00000030,
|
|
.dram_sdba2 = 0x00000000,
|
|
.dram_sdclk_0 = 0x00000030,
|
|
.dram_sdqs0 = 0x00000030,
|
|
.dram_sdqs1 = 0x00000030,
|
|
.dram_reset = 0x00000030,
|
|
};
|
|
|
|
static struct mx6_mmdc_calibration mx6_mmcd_calib = {
|
|
.p0_mpwldectrl0 = 0x00000000,
|
|
.p0_mpdgctrl0 = 0x01380134,
|
|
.p0_mprddlctl = 0x40404244,
|
|
.p0_mpwrdlctl = 0x40405050,
|
|
};
|
|
|
|
static struct mx6_ddr_sysinfo ddr_sysinfo = {
|
|
.dsize = 0,
|
|
.cs1_mirror = 0,
|
|
.cs_density = 32,
|
|
.ncs = 1,
|
|
.bi_on = 1,
|
|
.rtt_nom = 1,
|
|
.rtt_wr = 0,
|
|
.ralat = 5,
|
|
.walat = 0,
|
|
.mif3_mode = 3,
|
|
.rst_to_cke = 0x23,
|
|
.sde_to_rst = 0x10,
|
|
.refsel = 1,
|
|
.refr = 3,
|
|
};
|
|
|
|
static struct mx6_ddr3_cfg mem_ddr = {
|
|
.mem_speed = 1333,
|
|
.density = 2,
|
|
.width = 16,
|
|
.banks = 8,
|
|
.coladdr = 10,
|
|
.pagesz = 2,
|
|
.trcd = 1350,
|
|
.trcmin = 4950,
|
|
.trasmin = 3600,
|
|
};
|
|
|
|
static void ccgr_init(void)
|
|
{
|
|
struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
|
|
|
|
writel(0xFFFFFFFF, &ccm->CCGR0);
|
|
writel(0xFFFFFFFF, &ccm->CCGR1);
|
|
writel(0xFFFFFFFF, &ccm->CCGR2);
|
|
writel(0xFFFFFFFF, &ccm->CCGR3);
|
|
writel(0xFFFFFFFF, &ccm->CCGR4);
|
|
writel(0xFFFFFFFF, &ccm->CCGR5);
|
|
writel(0xFFFFFFFF, &ccm->CCGR6);
|
|
}
|
|
|
|
static void imx6ul_spl_dram_cfg_size(u32 ram_size)
|
|
{
|
|
if (ram_size == SZ_256M)
|
|
mem_ddr.rowaddr = 14;
|
|
else
|
|
mem_ddr.rowaddr = 15;
|
|
|
|
mx6ul_dram_iocfg(mem_ddr.width, &mx6_ddr_ioregs, &mx6_grp_ioregs);
|
|
mx6_dram_cfg(&ddr_sysinfo, &mx6_mmcd_calib, &mem_ddr);
|
|
}
|
|
|
|
static void imx6ul_spl_dram_cfg(void)
|
|
{
|
|
ulong ram_size_test, ram_size = 0;
|
|
|
|
for (ram_size = SZ_512M; ram_size >= SZ_256M; ram_size >>= 1) {
|
|
imx6ul_spl_dram_cfg_size(ram_size);
|
|
ram_size_test = get_ram_size((long int *)PHYS_SDRAM, ram_size);
|
|
if (ram_size_test == ram_size)
|
|
break;
|
|
}
|
|
|
|
if (ram_size < SZ_256M) {
|
|
puts("ERROR: DRAM size detection failed\n");
|
|
hang();
|
|
}
|
|
}
|
|
|
|
void board_init_f(ulong dummy)
|
|
{
|
|
ccgr_init();
|
|
arch_cpu_init();
|
|
board_early_init_f();
|
|
timer_init();
|
|
preloader_console_init();
|
|
imx6ul_spl_dram_cfg();
|
|
memset(__bss_start, 0, __bss_end - __bss_start);
|
|
board_init_r(NULL, 0);
|
|
}
|
|
|
|
void reset_cpu(ulong addr)
|
|
{
|
|
}
|
|
#endif
|