summaryrefslogtreecommitdiffstats
path: root/arch/ppc/boards/owc-da923rc/product_data.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/ppc/boards/owc-da923rc/product_data.c')
-rw-r--r--arch/ppc/boards/owc-da923rc/product_data.c83
1 files changed, 83 insertions, 0 deletions
diff --git a/arch/ppc/boards/owc-da923rc/product_data.c b/arch/ppc/boards/owc-da923rc/product_data.c
new file mode 100644
index 0000000000..eda10a4178
--- /dev/null
+++ b/arch/ppc/boards/owc-da923rc/product_data.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2013 GE Intelligent Platforms 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 ge_pd_header_check(unsigned short header)
+{
+ if (header != 0xa5a5)
+ return -1;
+ else
+ return 0;
+}
+
+static int ge_is_data_valid(struct ge_product_data *v)
+{
+ int crc, ret = 0;
+ const unsigned char *p = (const unsigned char *)v;
+
+ if (ge_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 ge_get_product_data(struct ge_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 (ge_pd_header_check(productp->v1.pdh.tag))
+ width = I2C_ADDR_16_BIT;
+
+ ret = i2c_read_reg(&client, width, (uint8_t *) productp,
+ sizeof(struct ge_product_data));
+
+ if (ret == sizeof(struct ge_product_data))
+ ret = ge_is_data_valid(productp);
+
+ return ret;
+}