1 files changed, 84 insertions, 0 deletions
diff --git a/arch/powerpc/boards/owc-da923rc/product_data.c b/arch/powerpc/boards/owc-da923rc/product_data.c
new file mode 100644
index 0000000000..5135afdd2a
--- /dev/null
+++ b/arch/powerpc/boards/owc-da923rc/product_data.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2013 GE Intelligent Platforms Inc.
+ * Copyright 2019 Abaco Systems Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * Retrieve and check the product data.
+ */
+
+#include <common.h>
+#include <crc.h>
+#include <i2c/i2c.h>
+#include <mach/immap_85xx.h>
+#include <mach/fsl_i2c.h>
+#include "product_data.h"
+
+static int owc_pd_header_check(unsigned short header)
+{
+	if (header != 0xa5a5)
+		return -1;
+	else
+		return 0;
+}
+
+static int owc_is_data_valid(struct owc_product_data *v)
+{
+	int crc, ret = 0;
+	const unsigned char *p = (const unsigned char *)v;
+
+	if (owc_pd_header_check(v->v1.pdh.tag))
+		return -1;
+
+	switch (v->v1.pdh.version) {
+	case PDVERSION_V1:
+	case PDVERSION_V1bis:
+		crc = crc32(0, p, sizeof(struct product_data_v1) - 4);
+		if (crc != v->v1.crc32)
+			ret = -1;
+		break;
+	case PDVERSION_V2:
+		crc = crc32(0, p, sizeof(struct product_data_v2) - 4);
+		if (crc != v->v2.crc32)
+			ret = -1;
+		break;
+	default:
+		ret = -1;
+	}
+
+	return ret;
+}
+
+int owc_get_product_data(struct owc_product_data *productp)
+{
+	struct i2c_adapter *adapter;
+	struct i2c_client client;
+	unsigned int width = 0;
+	int ret;
+
+	adapter = i2c_get_adapter(0);
+	client.addr = 0x51;
+	client.adapter = adapter;
+	ret = i2c_read_reg(&client, 0, (uint8_t *) productp,
+			   sizeof(unsigned short));
+
+	/* If there is no valid header, it may be a 16-bit eeprom. */
+	if (owc_pd_header_check(productp->v1.pdh.tag))
+		width = I2C_ADDR_16_BIT;
+
+	ret = i2c_read_reg(&client, width, (uint8_t *) productp,
+			   sizeof(struct owc_product_data));
+
+	if (ret == sizeof(struct owc_product_data))
+		ret = owc_is_data_valid(productp);
+
+	return ret;
+}