1 files changed, 86 insertions, 0 deletions
diff --git a/arch/arm/mach-rockchip/rk3188-board-tpl.c b/arch/arm/mach-rockchip/rk3188-board-tpl.c
new file mode 100644
index 0000000..442bfe7
--- /dev/null
+++ b/arch/arm/mach-rockchip/rk3188-board-tpl.c
@@ -0,0 +1,86 @@
+/*
+ * (C) Copyright 2015 Google, Inc
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>
+#include <debug_uart.h>
+#include <spl.h>
+#include <asm/io.h>
+#include <asm/arch/bootrom.h>
+#include <asm/arch/pmu_rk3188.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* track how often we were entered */
+static int rk3188_num_entries __attribute__ ((section(".data")));
+
+#define PMU_BASE	0x20004000
+#define TPL_ENTRY	0x10080C00
+
+static void jump_to_spl(void)
+{
+	typedef void __noreturn (*image_entry_noargs_t)(void);
+
+	struct rk3188_pmu * const pmu = (void *)PMU_BASE;
+	image_entry_noargs_t tpl_entry =
+		(image_entry_noargs_t)(unsigned long)TPL_ENTRY;
+
+	/* Store the SAVE_SP_ADDR in a location shared with TPL. */
+	writel(SAVE_SP_ADDR, &pmu->sys_reg[2]);
+	tpl_entry();
+}
+
+void board_init_f(ulong dummy)
+{
+	/* Example code showing how to enable the debug UART on RK3188 */
+#ifdef EARLY_UART
+#include <asm/arch/grf_rk3188.h>
+	/* Enable early UART on the RK3188 */
+#define GRF_BASE	0x20008000
+	struct rk3188_grf * const grf = (void *)GRF_BASE;
+
+	rk_clrsetreg(&grf->gpio1b_iomux,
+		     GPIO1B1_MASK << GPIO1B1_SHIFT |
+		     GPIO1B0_MASK << GPIO1B0_SHIFT,
+		     GPIO1B1_UART2_SOUT << GPIO1B1_SHIFT |
+		     GPIO1B0_UART2_SIN << GPIO1B0_SHIFT);
+	/*
+	 * Debug UART can be used from here if required:
+	 *
+	 * debug_uart_init();
+	 * printch('a');
+	 * printhex8(0x1234);
+	 * printascii("string");
+	 */
+	debug_uart_init();
+
+	printch('t');
+	printch('p');
+	printch('l');
+	printch('-');
+	printch(rk3188_num_entries + 1 + '0');
+	printch('\n');
+#endif
+
+	rk3188_num_entries++;
+
+	if (rk3188_num_entries == 1) {
+		/*
+		 * The original loader did some very basic integrity
+		 * checking at this point, but the remaining few bytes
+		 * could be used for any improvement making sense
+		 * really early on.
+		 */
+
+		back_to_bootrom();
+	} else {
+		/*
+		 * TPL part of the loader should now wait for us
+		 * at offset 0xC00 in the sram. Should never return
+		 * from there.
+		 */
+		jump_to_spl();
+	}
+}