mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-02 16:23:46 +09:00
b47ea79219
If we would like to boot from SD card, we have to implement mmc driver in SPL stage, and get a slightly large SPL binary. Rockchip SoC's bootrom code has the ability to load spl and u-boot, then boot. If CONFIG_ROCKCHIP_SPL_BACK_TO_BROM is enabled, the spl will return to bootrom in board_init_f(), then bootrom loads u-boot binary. Loading sequence after rework: bootrom ==> spl ==> bootrom ==> u-boot Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com> Acked-by: Simon Glass <sjg@chromium.org> Fixed up spelling of U-Boot, boorom, opinion->option, Rochchip: Signed-off-by: Simon Glass <sjg@chromium.org>
138 lines
2.4 KiB
C
138 lines
2.4 KiB
C
/*
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* (C) Copyright 2015 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <clk.h>
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#include <dm.h>
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#include <ram.h>
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#include <asm/io.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/periph.h>
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#include <asm/gpio.h>
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#include <dm/pinctrl.h>
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DECLARE_GLOBAL_DATA_PTR;
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int board_init(void)
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{
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#ifdef CONFIG_ROCKCHIP_SPL_BACK_TO_BROM
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struct udevice *pinctrl;
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int ret;
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/*
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* We need to implement sdcard iomux here for the further
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* initlization, otherwise, it'll hit sdcard command sending
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* timeout exception.
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*/
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ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
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if (ret) {
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debug("%s: Cannot find pinctrl device\n", __func__);
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goto err;
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}
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ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_SDCARD);
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if (ret) {
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debug("%s: Failed to set up SD card\n", __func__);
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goto err;
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}
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return 0;
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err:
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printf("board_init: Error %d\n", ret);
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/* No way to report error here */
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hang();
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return -1;
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#else
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return 0;
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#endif
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}
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int dram_init(void)
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{
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struct ram_info ram;
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struct udevice *dev;
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int ret;
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ret = uclass_get_device(UCLASS_RAM, 0, &dev);
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if (ret) {
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debug("DRAM init failed: %d\n", ret);
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return ret;
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}
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ret = ram_get_info(dev, &ram);
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if (ret) {
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debug("Cannot get DRAM size: %d\n", ret);
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return ret;
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}
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debug("SDRAM base=%lx, size=%x\n", ram.base, ram.size);
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gd->ram_size = ram.size;
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return 0;
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}
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#ifndef CONFIG_SYS_DCACHE_OFF
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void enable_caches(void)
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{
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/* Enable D-cache. I-cache is already enabled in start.S */
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dcache_enable();
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}
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#endif
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void lowlevel_init(void)
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{
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}
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static int do_clock(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[])
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{
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static const struct {
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char *name;
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int id;
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} clks[] = {
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{ "osc", CLK_OSC },
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{ "apll", CLK_ARM },
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{ "dpll", CLK_DDR },
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{ "cpll", CLK_CODEC },
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{ "gpll", CLK_GENERAL },
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#ifdef CONFIG_ROCKCHIP_RK3036
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{ "mpll", CLK_NEW },
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#else
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{ "npll", CLK_NEW },
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#endif
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};
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int ret, i;
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struct udevice *dev;
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ret = uclass_get_device(UCLASS_CLK, 0, &dev);
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if (ret) {
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printf("clk-uclass not found\n");
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return 0;
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}
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for (i = 0; i < ARRAY_SIZE(clks); i++) {
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struct clk clk;
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ulong rate;
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clk.id = clks[i].id;
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ret = clk_request(dev, &clk);
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if (ret < 0)
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continue;
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rate = clk_get_rate(&clk);
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printf("%s: %lu\n", clks[i].name, rate);
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clk_free(&clk);
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}
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return 0;
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}
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U_BOOT_CMD(
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clock, 2, 1, do_clock,
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"display information about clocks",
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""
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);
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