rk3368-board-tpl.c
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/*
* (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/arch/clock.h>
#include <debug_uart.h>
#include <dm.h>
#include <ram.h>
#include <spl.h>
#include <asm/io.h>
#include <asm/arch/bootrom.h>
#include <asm/arch/cru_rk3368.h>
#include <asm/arch/grf_rk3368.h>
#include <asm/arch/hardware.h>
#include <asm/arch/timer.h>
#include <syscon.h>
DECLARE_GLOBAL_DATA_PTR;
/*
* The SPL (and also the full U-Boot stage on the RK3368) will run in
* secure mode (i.e. EL3) and an ATF will eventually be booted before
* starting up the operating system... so we can initialize the SGRF
* here and rely on the ATF installing the final (secure) policy
* later.
*/
static inline uintptr_t sgrf_soc_con_addr(unsigned no)
{
const uintptr_t SGRF_BASE =
(uintptr_t)syscon_get_first_range(ROCKCHIP_SYSCON_SGRF);
return SGRF_BASE + sizeof(u32) * no;
}
static inline uintptr_t sgrf_busdmac_addr(unsigned no)
{
const uintptr_t SGRF_BASE =
(uintptr_t)syscon_get_first_range(ROCKCHIP_SYSCON_SGRF);
const uintptr_t SGRF_BUSDMAC_OFFSET = 0x100;
const uintptr_t SGRF_BUSDMAC_BASE = SGRF_BASE + SGRF_BUSDMAC_OFFSET;
return SGRF_BUSDMAC_BASE + sizeof(u32) * no;
}
static void sgrf_init(void)
{
struct rk3368_cru * const cru =
(struct rk3368_cru * const)rockchip_get_cru();
const u16 SGRF_SOC_CON_SEC = GENMASK(15, 0);
const u16 SGRF_BUSDMAC_CON0_SEC = BIT(2);
const u16 SGRF_BUSDMAC_CON1_SEC = GENMASK(15, 12);
/* Set all configurable IP to 'non secure'-mode */
rk_setreg(sgrf_soc_con_addr(5), SGRF_SOC_CON_SEC);
rk_setreg(sgrf_soc_con_addr(6), SGRF_SOC_CON_SEC);
rk_setreg(sgrf_soc_con_addr(7), SGRF_SOC_CON_SEC);
/*
* From rockchip-uboot/arch/arm/cpu/armv8/rk33xx/cpu.c
* Original comment: "ddr space set no secure mode"
*/
rk_clrreg(sgrf_soc_con_addr(8), SGRF_SOC_CON_SEC);
rk_clrreg(sgrf_soc_con_addr(9), SGRF_SOC_CON_SEC);
rk_clrreg(sgrf_soc_con_addr(10), SGRF_SOC_CON_SEC);
/* Set 'secure dma' to 'non secure'-mode */
rk_setreg(sgrf_busdmac_addr(0), SGRF_BUSDMAC_CON0_SEC);
rk_setreg(sgrf_busdmac_addr(1), SGRF_BUSDMAC_CON1_SEC);
dsb(); /* barrier */
rk_setreg(&cru->softrst_con[1], DMA1_SRST_REQ);
rk_setreg(&cru->softrst_con[4], DMA2_SRST_REQ);
dsb(); /* barrier */
udelay(10);
rk_clrreg(&cru->softrst_con[1], DMA1_SRST_REQ);
rk_clrreg(&cru->softrst_con[4], DMA2_SRST_REQ);
}
void board_debug_uart_init(void)
{
/*
* N.B.: This is called before the device-model has been
* initialised. For this reason, we can not access
* the GRF address range using the syscon API.
*/
struct rk3368_grf * const grf =
(struct rk3368_grf * const)0xff770000;
enum {
GPIO2D1_MASK = GENMASK(3, 2),
GPIO2D1_GPIO = 0,
GPIO2D1_UART0_SOUT = (1 << 2),
GPIO2D0_MASK = GENMASK(1, 0),
GPIO2D0_GPIO = 0,
GPIO2D0_UART0_SIN = (1 << 0),
};
#if defined(CONFIG_DEBUG_UART_BASE) && (CONFIG_DEBUG_UART_BASE == 0xff180000)
/* Enable early UART0 on the RK3368 */
rk_clrsetreg(&grf->gpio2d_iomux,
GPIO2D0_MASK, GPIO2D0_UART0_SIN);
rk_clrsetreg(&grf->gpio2d_iomux,
GPIO2D1_MASK, GPIO2D1_UART0_SOUT);
#endif
}
void board_init_f(ulong dummy)
{
struct udevice *dev;
int ret;
#define EARLY_UART
#ifdef EARLY_UART
/*
* Debug UART can be used from here if required:
*
* debug_uart_init();
* printch('a');
* printhex8(0x1234);
* printascii("string");
*/
debug_uart_init();
printascii("U-Boot TPL board init\n");
#endif
ret = spl_early_init();
if (ret) {
debug("spl_early_init() failed: %d\n", ret);
hang();
}
/* Reset security, so we can use DMA in the MMC drivers */
sgrf_init();
ret = uclass_get_device(UCLASS_RAM, 0, &dev);
if (ret) {
debug("DRAM init failed: %d\n", ret);
return;
}
}
void board_return_to_bootrom(void)
{
back_to_bootrom(BROM_BOOT_NEXTSTAGE);
}
u32 spl_boot_device(void)
{
return BOOT_DEVICE_BOOTROM;
}