GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/board/atmel/common/board.c

@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2017 Microchip
+ *		      Wenyou Yang <wenyou.yang@microchip.com>
+ */
+
+#include <common.h>
+#include <env.h>
+#include <w1.h>
+#include <w1-eeprom.h>
+#include <dm/device-internal.h>
+
+#define AT91_PDA_EEPROM_ID_OFFSET		15
+#define AT91_PDA_EEPROM_ID_LENGTH		5
+#define AT91_PDA_EEPROM_DEFAULT_BUS		0
+
+char *get_cpu_name(void);
+
+void dummy(void)
+{
+}
+
+#if defined CONFIG_W1
+void at91_pda_detect(void)
+{
+	struct udevice *bus, *dev;
+	u8 buf[AT91_PDA_EEPROM_ID_LENGTH + 1] = {0};
+	int ret;
+	int pda = 0;
+
+	ret = w1_get_bus(AT91_PDA_EEPROM_DEFAULT_BUS, &bus);
+	if (ret)
+		goto pda_detect_err;
+
+	for (device_find_first_child(bus, &dev);
+	     dev;
+	     device_find_next_child(&dev)) {
+		ret = device_probe(dev);
+		if (ret) {
+			continue;
+		} else {
+			ret = w1_eeprom_read_buf(dev, AT91_PDA_EEPROM_ID_OFFSET,
+						 (u8 *)buf, AT91_PDA_EEPROM_ID_LENGTH);
+			if (ret)
+				goto pda_detect_err;
+			break;
+		}
+	}
+	pda = simple_strtoul((const char *)buf, NULL, 10);
+
+	switch (pda) {
+	case 7000:
+		if (buf[4] == 'B')
+			printf("PDA TM7000B detected\n");
+		else
+			printf("PDA TM7000 detected\n");
+		break;
+	case 4300:
+		printf("PDA TM4300 detected\n");
+		break;
+	case 5000:
+		printf("PDA TM5000 detected\n");
+		break;
+	}
+
+pda_detect_err:
+	env_set("pda", (const char *)buf);
+}
+#else
+void at91_pda_detect(void)
+{
+}
+#endif
+
+void at91_prepare_cpu_var(void)
+{
+	env_set("cpu", get_cpu_name());
+}