Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / bootcount / bootcount_i2c.c

diff --git a/qemu/roms/u-boot/drivers/bootcount/bootcount_i2c.c b/qemu/roms/u-boot/drivers/bootcount/bootcount_i2c.c
new file mode 100644 (file)
index 0000000..e27b168
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/bootcount/bootcount_i2c.c
@@ -0,0 +1,44 @@
+/*
+ * (C) Copyright 2013
+ * Heiko Schocher, DENX Software Engineering, hs@denx.de.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <bootcount.h>
+#include <linux/compiler.h>
+#include <i2c.h>
+
+#define BC_MAGIC       0xbc
+
+void bootcount_store(ulong a)
+{
+       unsigned char buf[3];
+       int ret;
+
+       buf[0] = BC_MAGIC;
+       buf[1] = (a & 0xff);
+       ret = i2c_write(CONFIG_SYS_I2C_RTC_ADDR, CONFIG_SYS_BOOTCOUNT_ADDR,
+                 CONFIG_BOOTCOUNT_ALEN, buf, 2);
+       if (ret != 0)
+               puts("Error writing bootcount\n");
+}
+
+ulong bootcount_load(void)
+{
+       unsigned char buf[3];
+       int ret;
+
+       ret = i2c_read(CONFIG_SYS_I2C_RTC_ADDR, CONFIG_SYS_BOOTCOUNT_ADDR,
+                      CONFIG_BOOTCOUNT_ALEN, buf, 2);
+       if (ret != 0) {
+               puts("Error loading bootcount\n");
+               return 0;
+       }
+       if (buf[0] == BC_MAGIC)
+               return buf[1];
+
+       bootcount_store(0);
+
+       return 0;
+}