1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH 4 */ 5 6 #include <common.h> 7 #include <debug_uart.h> 8 #include <dm.h> 9 #include <ram.h> 10 #include <spl.h> 11 #include <syscon.h> 12 #include <asm/io.h> 13 #include <asm/arch/bootrom.h> 14 #include <asm/arch/clock.h> 15 #include <asm/arch/cru_rk3368.h> 16 #include <asm/arch/grf_rk3368.h> 17 #include <asm/arch/hardware.h> 18 #include <asm/arch/timer.h> 19 20 /* 21 * The SPL (and also the full U-Boot stage on the RK3368) will run in 22 * secure mode (i.e. EL3) and an ATF will eventually be booted before 23 * starting up the operating system... so we can initialize the SGRF 24 * here and rely on the ATF installing the final (secure) policy 25 * later. 26 */ 27 static inline uintptr_t sgrf_soc_con_addr(unsigned no) 28 { 29 const uintptr_t SGRF_BASE = 30 (uintptr_t)syscon_get_first_range(ROCKCHIP_SYSCON_SGRF); 31 32 return SGRF_BASE + sizeof(u32) * no; 33 } 34 35 static inline uintptr_t sgrf_busdmac_addr(unsigned no) 36 { 37 const uintptr_t SGRF_BASE = 38 (uintptr_t)syscon_get_first_range(ROCKCHIP_SYSCON_SGRF); 39 const uintptr_t SGRF_BUSDMAC_OFFSET = 0x100; 40 const uintptr_t SGRF_BUSDMAC_BASE = SGRF_BASE + SGRF_BUSDMAC_OFFSET; 41 42 return SGRF_BUSDMAC_BASE + sizeof(u32) * no; 43 } 44 45 static void sgrf_init(void) 46 { 47 struct rk3368_cru * const cru = 48 (struct rk3368_cru * const)rockchip_get_cru(); 49 const u16 SGRF_SOC_CON_SEC = GENMASK(15, 0); 50 const u16 SGRF_BUSDMAC_CON0_SEC = BIT(2); 51 const u16 SGRF_BUSDMAC_CON1_SEC = GENMASK(15, 12); 52 53 /* Set all configurable IP to 'non secure'-mode */ 54 rk_setreg(sgrf_soc_con_addr(5), SGRF_SOC_CON_SEC); 55 rk_setreg(sgrf_soc_con_addr(6), SGRF_SOC_CON_SEC); 56 rk_setreg(sgrf_soc_con_addr(7), SGRF_SOC_CON_SEC); 57 58 /* 59 * From rockchip-uboot/arch/arm/cpu/armv8/rk33xx/cpu.c 60 * Original comment: "ddr space set no secure mode" 61 */ 62 rk_clrreg(sgrf_soc_con_addr(8), SGRF_SOC_CON_SEC); 63 rk_clrreg(sgrf_soc_con_addr(9), SGRF_SOC_CON_SEC); 64 rk_clrreg(sgrf_soc_con_addr(10), SGRF_SOC_CON_SEC); 65 66 /* Set 'secure dma' to 'non secure'-mode */ 67 rk_setreg(sgrf_busdmac_addr(0), SGRF_BUSDMAC_CON0_SEC); 68 rk_setreg(sgrf_busdmac_addr(1), SGRF_BUSDMAC_CON1_SEC); 69 70 dsb(); /* barrier */ 71 72 rk_setreg(&cru->softrst_con[1], DMA1_SRST_REQ); 73 rk_setreg(&cru->softrst_con[4], DMA2_SRST_REQ); 74 75 dsb(); /* barrier */ 76 udelay(10); 77 78 rk_clrreg(&cru->softrst_con[1], DMA1_SRST_REQ); 79 rk_clrreg(&cru->softrst_con[4], DMA2_SRST_REQ); 80 } 81 82 void board_debug_uart_init(void) 83 { 84 /* 85 * N.B.: This is called before the device-model has been 86 * initialised. For this reason, we can not access 87 * the GRF address range using the syscon API. 88 */ 89 struct rk3368_grf * const grf = 90 (struct rk3368_grf * const)0xff770000; 91 92 enum { 93 GPIO2D1_MASK = GENMASK(3, 2), 94 GPIO2D1_GPIO = 0, 95 GPIO2D1_UART0_SOUT = (1 << 2), 96 97 GPIO2D0_MASK = GENMASK(1, 0), 98 GPIO2D0_GPIO = 0, 99 GPIO2D0_UART0_SIN = (1 << 0), 100 }; 101 102 #if defined(CONFIG_DEBUG_UART_BASE) && (CONFIG_DEBUG_UART_BASE == 0xff180000) 103 /* Enable early UART0 on the RK3368 */ 104 rk_clrsetreg(&grf->gpio2d_iomux, 105 GPIO2D0_MASK, GPIO2D0_UART0_SIN); 106 rk_clrsetreg(&grf->gpio2d_iomux, 107 GPIO2D1_MASK, GPIO2D1_UART0_SOUT); 108 #endif 109 } 110 111 void board_init_f(ulong dummy) 112 { 113 struct udevice *dev; 114 int ret; 115 116 #define EARLY_UART 117 #ifdef EARLY_UART 118 /* 119 * Debug UART can be used from here if required: 120 * 121 * debug_uart_init(); 122 * printch('a'); 123 * printhex8(0x1234); 124 * printascii("string"); 125 */ 126 debug_uart_init(); 127 printascii("U-Boot TPL board init\n"); 128 #endif 129 130 ret = spl_early_init(); 131 if (ret) { 132 debug("spl_early_init() failed: %d\n", ret); 133 hang(); 134 } 135 136 /* Reset security, so we can use DMA in the MMC drivers */ 137 sgrf_init(); 138 139 ret = uclass_get_device(UCLASS_RAM, 0, &dev); 140 if (ret) { 141 debug("DRAM init failed: %d\n", ret); 142 return; 143 } 144 } 145 146 void board_return_to_bootrom(void) 147 { 148 back_to_bootrom(BROM_BOOT_NEXTSTAGE); 149 } 150 151 u32 spl_boot_device(void) 152 { 153 return BOOT_DEVICE_BOOTROM; 154 } 155