rockchip: rk3368: spl: add TPL support
This adds the TPL support for the RK3368, including the u-boot-tpl.lds.
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/mach-rockchip/rk3368-board-tpl.c b/arch/arm/mach-rockchip/rk3368-board-tpl.c
new file mode 100644
index 0000000..1a69da2
--- /dev/null
+++ b/arch/arm/mach-rockchip/rk3368-board-tpl.c
@@ -0,0 +1,176 @@
+/*
+ * (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 ARMv8 generic timer uses the STIMER1 as its clock-source.
+ * Set up the STIMER1 to free-running (i.e. auto-reload) to start
+ * the generic timer counting (if we don't do this, udelay will not
+ * work and block indefinitively).
+ */
+static void secure_timer_init(void)
+{
+ struct rk_timer * const stimer1 =
+ (struct rk_timer * const)0xff830020;
+ const u32 TIMER_EN = BIT(0);
+
+ writel(~0u, &stimer1->timer_load_count0);
+ writel(~0u, &stimer1->timer_load_count1);
+ writel(TIMER_EN, &stimer1->timer_ctrl_reg);
+}
+
+/*
+ * 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();
+ }
+
+ /* Make sure the ARMv8 generic timer counts */
+ secure_timer_init();
+ /* 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();
+}
+
+u32 spl_boot_device(void)
+{
+ return BOOT_DEVICE_BOOTROM;
+}