[U-Boot] [PATCH v2 3/8] rockchip: rk3288: implement reading chip version from bootrom code

[Alberto Panizzo <alberto@amarulasolutions.com>]

This allows rockusb code to reply correctly to K_FW_GET_CHIP_VER
command.

On RK3288 chip version is at 0xffff4ff0 and on tested hardware it
corresponds at the string "320A20140813V200"

Signed-off-by: Alberto Panizzo <alberto@amarulasolutions.com>
---
 arch/arm/mach-rockchip/rk3288/Makefile         |  1 +
 arch/arm/mach-rockchip/rk3288/rockusb_rk3288.c | 30 ++++++++++++++++++++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 arch/arm/mach-rockchip/rk3288/rockusb_rk3288.c

diff --git a/arch/arm/mach-rockchip/rk3288/Makefile b/arch/arm/mach-rockchip/rk3288/Makefile
index a0033a0..da0eb4a 100644
--- a/arch/arm/mach-rockchip/rk3288/Makefile
+++ b/arch/arm/mach-rockchip/rk3288/Makefile
@@ -7,3 +7,4 @@
 obj-y += clk_rk3288.o
 obj-y += rk3288.o
 obj-y += syscon_rk3288.o
+obj-$(CONFIG_USB_FUNCTION_ROCKUSB) += rockusb_rk3288.o
diff --git a/arch/arm/mach-rockchip/rk3288/rockusb_rk3288.c b/arch/arm/mach-rockchip/rk3288/rockusb_rk3288.c
new file mode 100644
index 0000000..62057c1
--- /dev/null
+++ b/arch/arm/mach-rockchip/rk3288/rockusb_rk3288.c
@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Amarula Solutions
+ * Written by Alberto Panizzo <alberto@amarulasolutions.com>
+ */
+
+#include <config.h>
+#include <common.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+#include <asm/arch/boot_mode.h>
+#include <asm/arch/pmu_rk3288.h>
+
+#define ROM_PHYS	0xffff0000
+
+#define ROM_CHIP_VER_ADDR_ADDR		(ROM_PHYS + 0x4FF0)
+#define ROM_CHIP_VER_ADDR_SIZE		16
+
+int rk_get_bootrom_chip_version(unsigned int *chip_info, int size)
+{
+	if (!chip_info)
+		return -1;
+	if (size < ROM_CHIP_VER_ADDR_SIZE / sizeof(int))
+		return -1;
+
+	memcpy((char *)chip_info, (char *)ROM_CHIP_VER_ADDR_ADDR,
+	       ROM_CHIP_VER_ADDR_SIZE);
+
+	return 0;
+}
-- 
2.7.4