[U-Boot] [PATCH 1/3] rockchip: evb-rk3399: add ethaddr and serial# init

[Kever Yang]

Sync the code from puma-rk3399:
8adc9d1 rockchip: board: puma_rk3399: derive ethaddr from cpuid
9415b9a rockchip: board: puma_rk3399: add support for serial# and cpuid#
via efuses

Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
---

 board/rockchip/evb_rk3399/evb-rk3399.c | 123 ++++++++++++++++++++++++++++++++-
 1 file changed, 121 insertions(+), 2 deletions(-)

diff --git a/board/rockchip/evb_rk3399/evb-rk3399.c b/board/rockchip/evb_rk3399/evb-rk3399.c
index d50c59d..40fc1a5 100644
--- a/board/rockchip/evb_rk3399/evb-rk3399.c
+++ b/board/rockchip/evb_rk3399/evb-rk3399.c
@@ -5,23 +5,29 @@
  */
 #include <common.h>
 #include <dm.h>
+#include <misc.h>
 #include <ram.h>
 #include <dm/pinctrl.h>
 #include <dm/uclass-internal.h>
+#include <asm/setup.h>
 #include <asm/arch/periph.h>
 #include <power/regulator.h>
+#include <u-boot/sha256.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#define RK3399_CPUID_OFF  0x7
+#define RK3399_CPUID_LEN  0x10
+
 int board_init(void)
 {
 	struct udevice *pinctrl, *regulator;
 	int ret;
 
 	/*
-	 * The PWM do not have decicated interrupt number in dts and can
+	 * The PWM does not have decicated interrupt number in dts and can
 	 * not get periph_id by pinctrl framework, so let's init them here.
-	 * The PWM2 and PWM3 are for pwm regulater.
+	 * The PWM2 and PWM3 are for pwm regulators.
 	 */
 	ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
 	if (ret) {
@@ -67,3 +73,116 @@ int board_init(void)
 out:
 	return 0;
 }
+
+static void setup_macaddr(void)
+{
+#if CONFIG_IS_ENABLED(CMD_NET)
+	int ret;
+	const char *cpuid = getenv("cpuid#");
+	u8 hash[SHA256_SUM_LEN];
+	int size = sizeof(hash);
+	u8 mac_addr[6];
+
+	/* Only generate a MAC address, if none is set in the environment */
+	if (getenv("ethaddr"))
+		return;
+
+	if (!cpuid) {
+		debug("%s: could not retrieve 'cpuid#'\n", __func__);
+		return;
+	}
+
+	ret = hash_block("sha256", (void *)cpuid, strlen(cpuid), hash, &size);
+	if (ret) {
+		debug("%s: failed to calculate SHA256\n", __func__);
+		return;
+	}
+
+	/* Copy 6 bytes of the hash to base the MAC address on */
+	memcpy(mac_addr, hash, 6);
+
+	/* Make this a valid MAC address and set it */
+	mac_addr[0] &= 0xfe;  /* clear multicast bit */
+	mac_addr[0] |= 0x02;  /* set local assignment bit (IEEE802) */
+	eth_setenv_enetaddr("ethaddr", mac_addr);
+#endif
+
+	return;
+}
+
+static void setup_serial(void)
+{
+#if CONFIG_IS_ENABLED(ROCKCHIP_EFUSE)
+	struct udevice *dev;
+	int ret, i;
+	u8 cpuid[RK3399_CPUID_LEN];
+	u8 low[RK3399_CPUID_LEN/2], high[RK3399_CPUID_LEN/2];
+	char cpuid_str[RK3399_CPUID_LEN * 2 + 1];
+	u64 serialno;
+	char serialno_str[16];
+
+	/* retrieve the device */
+	ret = uclass_get_device_by_driver(UCLASS_MISC,
+					  DM_GET_DRIVER(rockchip_efuse), &dev);
+	if (ret) {
+		debug("%s: could not find efuse device\n", __func__);
+		return;
+	}
+
+	/* read the cpu_id range from the efuses */
+	ret = misc_read(dev, RK3399_CPUID_OFF, &cpuid, sizeof(cpuid));
+	if (ret) {
+		debug("%s: reading cpuid from the efuses failed\n",
+		      __func__);
+		return;
+	}
+
+	memset(cpuid_str, 0, sizeof(cpuid_str));
+	for (i = 0; i < 16; i++)
+		sprintf(&cpuid_str[i * 2], "%02x", cpuid[i]);
+
+	debug("cpuid: %s\n", cpuid_str);
+
+	/*
+	 * Mix the cpuid bytes using the same rules as in
+	 *   ${linux}/drivers/soc/rockchip/rockchip-cpuinfo.c
+	 */
+	for (i = 0; i < 8; i++) {
+		low[i] = cpuid[1 + (i << 1)];
+		high[i] = cpuid[i << 1];
+	}
+
+	serialno = crc32_no_comp(0, low, 8);
+	serialno |= (u64)crc32_no_comp(serialno, high, 8) << 32;
+	snprintf(serialno_str, sizeof(serialno_str), "%llx", serialno);
+
+	setenv("cpuid#", cpuid_str);
+	setenv("serial#", serialno_str);
+#endif
+
+	return;
+}
+
+int misc_init_r(void)
+{
+	setup_serial();
+	setup_macaddr();
+
+	return 0;
+}
+
+#ifdef CONFIG_SERIAL_TAG
+void get_board_serial(struct tag_serialnr *serialnr)
+{
+	char *serial_string;
+	u64 serial = 0;
+
+	serial_string = getenv("serial#");
+
+	if (serial_string)
+		serial = simple_strtoull(serial_string, NULL, 16);
+
+	serialnr->high = (u32)(serial >> 32);
+	serialnr->low = (u32)(serial & 0xffffffff);
+}
+#endif
-- 
1.9.1