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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 <libflash/libflash.h>
#include <libflash/libffs.h>
#include <ast.h>
#include "astbmc.h"
static struct spi_flash_ctrl *pnor_ctrl;
static struct flash_chip *pnor_chip;
static struct ffs_handle *pnor_ffs;
int pnor_init(void)
{
uint32_t nv_part, nv_start, nv_size;
int rc;
/* Open controller, flash and ffs */
rc = ast_sf_open(AST_SF_TYPE_PNOR, &pnor_ctrl);
if (rc) {
prerror("PLAT: Failed to open PNOR flash controller\n");
goto fail;
}
rc = flash_init(pnor_ctrl, &pnor_chip);
if (rc) {
prerror("PLAT: Failed to open init PNOR driver\n");
goto fail;
}
rc = ffs_open_flash(pnor_chip, 0, 0, &pnor_ffs);
if (rc) {
prerror("PLAT: Failed to parse FFS partition map\n");
goto fail;
}
/*
* Grab NVRAM and initialize the flash_nvram module
*
* Note: Ignore actual size for now ... some images have
* it setup incorrectly.
*/
rc = ffs_lookup_part(pnor_ffs, "NVRAM", &nv_part);
if (rc) {
prerror("PLAT: No NVRAM partition in PNOR\n");
return OPAL_HARDWARE;
}
rc = ffs_part_info(pnor_ffs, nv_part, NULL,
&nv_start, &nv_size, NULL);
if (rc) {
prerror("PLAT: Failed to get NVRAM partition info\n");
return OPAL_HARDWARE;
}
flash_nvram_init(pnor_chip, nv_start, nv_size);
return 0;
fail:
if (pnor_ffs)
ffs_close(pnor_ffs);
pnor_ffs = NULL;
if (pnor_chip)
flash_exit(pnor_chip);
pnor_chip = NULL;
if (pnor_ctrl)
ast_sf_close(pnor_ctrl);
pnor_ctrl = NULL;
return rc;
}
static const struct {
enum resource_id id;
char name[PART_NAME_MAX+1];
} part_name_map[] = {
{ RESOURCE_ID_KERNEL, "KERNEL" },
{ RESOURCE_ID_INITRAMFS, "ROOTFS" },
};
bool pnor_load_resource(enum resource_id id, void *buf, size_t *len)
{
int i, rc, part_num, part_size, part_start;
const char *name;
if (!pnor_ffs || !pnor_chip)
return false;
for (i = 0, name = NULL; i < ARRAY_SIZE(part_name_map); i++) {
if (part_name_map[i].id == id) {
name = part_name_map[i].name;
break;
}
}
if (!name) {
prerror("PLAT: Couldn't find partition for id %d\n", id);
return false;
}
rc = ffs_lookup_part(pnor_ffs, name, &part_num);
if (rc) {
prerror("PLAT: No %s partition in PNOR\n", name);
return false;
}
rc = ffs_part_info(pnor_ffs, part_num, NULL,
&part_start, &part_size, NULL);
if (rc) {
prerror("PLAT: Failed to get %s partition info\n", name);
return false;
}
if (part_size > *len) {
prerror("PLAT: %s image too large (%d > %zd)\n", name,
part_size, *len);
return false;
}
rc = flash_read(pnor_chip, part_start, buf, part_size);
if (rc) {
prerror("PLAT: failed to read %s partition\n", name);
return false;
}
*len = part_size;
return true;
}
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