arm: mvebu: turris_omnia: Implement getting board information from MCU
Implement reading board serial number, first MAC address and board
version from MCU. MCU supports board information if the FEAT_BOARD_INFO
feature bit is set in MCU features.
Prefer getting board information from MCU if supported, fallback to
Atmel SHA chip.
Signed-off-by: Marek Behún <kabel@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/board/CZ.NIC/turris_omnia/Makefile b/board/CZ.NIC/turris_omnia/Makefile
index dc39b44..341378b 100644
--- a/board/CZ.NIC/turris_omnia/Makefile
+++ b/board/CZ.NIC/turris_omnia/Makefile
@@ -2,4 +2,4 @@
#
# Copyright (C) 2017 Marek Behún <kabel@kernel.org>
-obj-y := turris_omnia.o ../turris_atsha_otp.o
+obj-y := turris_omnia.o ../turris_atsha_otp.o ../turris_common.o
diff --git a/board/CZ.NIC/turris_omnia/turris_omnia.c b/board/CZ.NIC/turris_omnia/turris_omnia.c
index 6dfde5e..f63640a 100644
--- a/board/CZ.NIC/turris_omnia/turris_omnia.c
+++ b/board/CZ.NIC/turris_omnia/turris_omnia.c
@@ -18,6 +18,7 @@
#include <asm/io.h>
#include <asm/arch/cpu.h>
#include <asm/arch/soc.h>
+#include <asm/unaligned.h>
#include <dm/uclass.h>
#include <dt-bindings/gpio/gpio.h>
#include <fdt_support.h>
@@ -25,12 +26,14 @@
#include <time.h>
#include <turris-omnia-mcu-interface.h>
#include <linux/bitops.h>
+#include <linux/bitrev.h>
#include <linux/delay.h>
#include <u-boot/crc.h>
#include "../drivers/ddr/marvell/a38x/ddr3_init.h"
#include <../serdes/a38x/high_speed_env_spec.h>
#include "../turris_atsha_otp.h"
+#include "../turris_common.h"
DECLARE_GLOBAL_DATA_PTR;
@@ -186,6 +189,70 @@
return feature & features;
}
+static u32 omnia_mcu_crc32(const void *p, size_t len)
+{
+ u32 val, crc = 0;
+
+ compiletime_assert(!(len % 4), "length has to be a multiple of 4");
+
+ while (len) {
+ val = bitrev32(get_unaligned_le32(p));
+ crc = crc32(crc, (void *)&val, 4);
+ p += 4;
+ len -= 4;
+ }
+
+ return ~bitrev32(crc);
+}
+
+/* Can only be called after relocation, since it needs cleared BSS */
+static int omnia_mcu_board_info(char *serial, u8 *mac, char *version)
+{
+ static u8 reply[17];
+ static bool cached;
+
+ if (!cached) {
+ u8 csum;
+ int ret;
+
+ ret = omnia_mcu_read(CMD_BOARD_INFO_GET, reply, sizeof(reply));
+ if (ret)
+ return ret;
+
+ if (reply[0] != 16)
+ return -EBADMSG;
+
+ csum = reply[16];
+ reply[16] = 0;
+
+ if ((omnia_mcu_crc32(&reply[1], 16) & 0xff) != csum)
+ return -EBADMSG;
+
+ cached = true;
+ }
+
+ if (serial) {
+ const char *serial_env;
+
+ serial_env = env_get("serial#");
+ if (serial_env && strlen(serial_env) == 16) {
+ strcpy(serial, serial_env);
+ } else {
+ sprintf(serial, "%016llX",
+ get_unaligned_le64(&reply[1]));
+ env_set("serial#", serial);
+ }
+ }
+
+ if (mac)
+ memcpy(mac, &reply[9], ETH_ALEN);
+
+ if (version)
+ sprintf(version, "%u", reply[15]);
+
+ return 0;
+}
+
static void enable_a385_watchdog(unsigned int timeout_minutes)
{
struct sar_freq_modes sar_freq;
@@ -965,13 +1032,23 @@
int checkboard(void)
{
- char serial[17];
+ char serial[17], version[4];
+ bool has_version;
int err;
- err = turris_atsha_otp_get_serial_number(serial);
printf(" MCU type: %s\n", omnia_get_mcu_type());
printf(" MCU version: %s\n", omnia_get_mcu_version());
printf(" RAM size: %i MiB\n", omnia_get_ram_size_gb() * 1024);
+
+ if (omnia_mcu_has_feature(FEAT_BOARD_INFO)) {
+ err = omnia_mcu_board_info(serial, NULL, version);
+ has_version = !err;
+ } else {
+ err = turris_atsha_otp_get_serial_number(serial);
+ has_version = false;
+ }
+
+ printf(" Board version: %s\n", has_version ? version : "unknown");
printf(" Serial Number: %s\n", !err ? serial : "unknown");
return 0;
@@ -979,8 +1056,17 @@
int misc_init_r(void)
{
- turris_atsha_otp_init_mac_addresses(1);
- turris_atsha_otp_init_serial_number();
+ if (omnia_mcu_has_feature(FEAT_BOARD_INFO)) {
+ char serial[17];
+ u8 first_mac[6];
+
+ if (!omnia_mcu_board_info(serial, first_mac, NULL))
+ turris_init_mac_addresses(1, first_mac);
+ } else {
+ turris_atsha_otp_init_mac_addresses(1);
+ turris_atsha_otp_init_serial_number();
+ }
+
return 0;
}