From: Patrick Delaunay <patrick.delau...@st.com>
Use OTP57 and 58 for MAC address
- OTP57 = MAC address bits [31:0]
- OTP58 = MAC address bit [47:32] stored in OTP LSB's
Use manufacture information in OTP13 to OTP15 to build unique
chip id saved in env variable "serial#"
(used for USB device enumeration)
Signed-off-by: Patrick Delaunay <patrick.delau...@st.com>
Signed-off-by: Patrice Chotard <patrice.chot...@st.com>
---
arch/arm/mach-stm32mp/cpu.c | 81 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 81 insertions(+)
diff --git a/arch/arm/mach-stm32mp/cpu.c b/arch/arm/mach-stm32mp/cpu.c
index 2deee0961822..0e01f8e61385 100644
--- a/arch/arm/mach-stm32mp/cpu.c
+++ b/arch/arm/mach-stm32mp/cpu.c
@@ -5,9 +5,12 @@
#include <common.h>
#include <clk.h>
#include <debug_uart.h>
+#include <environment.h>
+#include <misc.h>
#include <asm/io.h>
#include <asm/arch/stm32.h>
#include <asm/arch/sys_proto.h>
+#include <dm/device.h>
#include <dm/uclass.h>
/* RCC register */
@@ -51,6 +54,10 @@
#define BOOTROM_INSTANCE_MASK GENMASK(31, 16)
#define BOOTROM_INSTANCE_SHIFT 16
+/* BSEC OTP index */
+#define BSEC_OTP_SERIAL 13
+#define BSEC_OTP_MAC 57
+
#if !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD)
static void security_init(void)
{
@@ -274,9 +281,83 @@ static void setup_boot_mode(void)
}
}
+/*
+ * If there is no MAC address in the environment, then it will be initialized
+ * (silently) from the value in the OTP.
+ */
+static int setup_mac_address(void)
+{
+#if defined(CONFIG_NET)
+ int ret;
+ int i;
+ u32 otp[2];
+ uchar enetaddr[6];
+ struct udevice *dev;
+
+ /* MAC already in environment */
+ if (eth_env_get_enetaddr("ethaddr", enetaddr))
+ return 0;
+
+ ret = uclass_get_device_by_driver(UCLASS_MISC,
+ DM_GET_DRIVER(stm32mp_bsec),
+ &dev);
+ if (ret)
+ return ret;
+
+ ret = misc_read(dev, BSEC_OTP_MAC * 4 + STM32_BSEC_OTP_OFFSET,
+ otp, sizeof(otp));
+ if (ret)
+ return ret;
+
+ for (i = 0; i < 6; i++)
+ enetaddr[i] = ((uint8_t *)&otp)[i];
+
+ if (!is_valid_ethaddr(enetaddr)) {
+ pr_err("invalid MAC address in OTP %pM", enetaddr);
+ return -EINVAL;
+ }
+ pr_debug("OTP MAC address = %pM\n", enetaddr);
+ ret = !eth_env_set_enetaddr("ethaddr", enetaddr);
+ if (!ret)
+ pr_err("Failed to set mac address %pM from OTP: %d\n",
+ enetaddr, ret);
+#endif
+
+ return 0;
+}
+
+static int setup_serial_number(void)
+{
+ char serial_string[25];
+ u32 otp[3] = {0, 0, 0 };
+ struct udevice *dev;
+ int ret;
+
+ if (env_get("serial#"))
+ return 0;
+
+ ret = uclass_get_device_by_driver(UCLASS_MISC,
+ DM_GET_DRIVER(stm32mp_bsec),
+ &dev);
+ if (ret)
+ return ret;
+
+ ret = misc_read(dev, BSEC_OTP_SERIAL * 4 + STM32_BSEC_OTP_OFFSET,
+ otp, sizeof(otp));
+ if (ret)
+ return ret;
+
+ sprintf(serial_string, "%08x%08x%08x", otp[0], otp[1], otp[2]);
+ env_set("serial#", serial_string);
+
+ return 0;
+}
+
int arch_misc_init(void)
{
setup_boot_mode();
+ setup_mac_address();
+ setup_serial_number();
return 0;
}
--
1.9.1
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