67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
/*
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* Copyright 2013 GE Intelligent Platforms Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Retrieve and check the product data.
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*/
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#include <common.h>
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#include <i2c/i2c.h>
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#include <mach/immap_85xx.h>
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#include <mach/fsl_i2c.h>
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#include "product_data.h"
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static int ge_is_data_valid(struct ge_product_data *v)
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{
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int crc, ret = 0;
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const unsigned char *p = (const unsigned char *)v;
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if (v->v1.pdh.tag != 0xa5a5)
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return -1;
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switch (v->v1.pdh.version) {
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case PDVERSION_V1:
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case PDVERSION_V1bis:
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crc = crc32(0, p, sizeof(struct product_data_v1) - 4);
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if (crc != v->v1.crc32)
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ret = -1;
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break;
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case PDVERSION_V2:
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crc = crc32(0, p, sizeof(struct product_data_v2) - 4);
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if (crc != v->v2.crc32)
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ret = -1;
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break;
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default:
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ret = -1;
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}
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return ret;
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}
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int ge_get_product_data(struct ge_product_data *productp)
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{
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struct i2c_adapter *adapter;
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struct i2c_client client;
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int ret;
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adapter = i2c_get_adapter(0);
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client.addr = 0x51;
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client.adapter = adapter;
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ret = i2c_read_reg(&client, 0, (uint8_t *) productp,
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sizeof(struct ge_product_data));
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if (ret == sizeof(struct ge_product_data))
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ret = ge_is_data_valid(productp);
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return ret;
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}
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