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/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <skiboot.h>
#include <device.h>
#include <console.h>
#include <opal.h>
#include <platform.h>
#include <libflash/libflash.h>
static struct flash_chip *fl_nv_chip;
static uint32_t fl_nv_start, fl_nv_size;
static int flash_nvram_info(uint32_t *total_size)
{
if (!fl_nv_chip)
return OPAL_HARDWARE;
*total_size = fl_nv_size;
return OPAL_SUCCESS;
}
static int flash_nvram_start_read(void *dst, uint32_t src, uint32_t len)
{
int rc;
if ((src + len) > fl_nv_size) {
prerror("FLASH_NVRAM: read out of bound (0x%x,0x%x)\n",
src, len);
return OPAL_PARAMETER;
}
rc = flash_read(fl_nv_chip, fl_nv_start + src, dst, len);
if (rc)
return rc;
nvram_read_complete(true);
return 0;
}
static int flash_nvram_write(uint32_t dst, void *src, uint32_t len)
{
/* TODO: When we have async jobs for PRD, turn this into one */
if ((dst + len) > fl_nv_size) {
prerror("FLASH_NVRAM: write out of bound (0x%x,0x%x)\n",
dst, len);
return OPAL_PARAMETER;
}
return flash_smart_write(fl_nv_chip, fl_nv_start + dst, src, len);
}
int flash_nvram_init(struct flash_chip *chip, uint32_t start, uint32_t size)
{
fl_nv_chip = chip;
fl_nv_start = start;
fl_nv_size = size;
platform.nvram_info = flash_nvram_info;
platform.nvram_start_read = flash_nvram_start_read;
platform.nvram_write = flash_nvram_write;
return 0;
}
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