rockchip: add early uart driver
add early uart driver so we can print debug message in
SPL stage
Signed-off-by: Lin Huang <hl@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/include/asm/arch-rockchip/uart.h b/arch/arm/include/asm/arch-rockchip/uart.h
new file mode 100644
index 0000000..ea86ce6
--- /dev/null
+++ b/arch/arm/include/asm/arch-rockchip/uart.h
@@ -0,0 +1,44 @@
+/*
+ * (C) Copyright 2015 Rockchip Electronics Co., Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __ASM_ARCH_UART_H
+#define __ASM_ARCH_UART_H
+struct rk_uart {
+ unsigned int rbr; /* Receive buffer register. */
+ unsigned int ier; /* Interrupt enable register. */
+ unsigned int fcr; /* FIFO control register. */
+ unsigned int lcr; /* Line control register. */
+ unsigned int mcr; /* Modem control register. */
+ unsigned int lsr; /* Line status register. */
+ unsigned int msr; /* Modem status register. */
+ unsigned int scr;
+ unsigned int reserved1[(0x30 - 0x20) / 4];
+ unsigned int srbr[(0x70 - 0x30) / 4];
+ unsigned int far;
+ unsigned int tfr;
+ unsigned int rfw;
+ unsigned int usr;
+ unsigned int tfl;
+ unsigned int rfl;
+ unsigned int srr;
+ unsigned int srts;
+ unsigned int sbcr;
+ unsigned int sdmam;
+ unsigned int sfe;
+ unsigned int srt;
+ unsigned int stet;
+ unsigned int htx;
+ unsigned int dmasa;
+ unsigned int reserver2[(0xf4 - 0xac) / 4];
+ unsigned int cpr;
+ unsigned int ucv;
+ unsigned int ctr;
+};
+
+void rk_uart_init(void *base);
+void print_hex(unsigned int n);
+void print(char *s);
+#endif