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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/mbox-flash.h>
#include <libflash/libflash.h>
#include <libflash/libffs.h>
#include <libflash/blocklevel.h>
#include <ast.h>
#include "astbmc.h"
int pnor_init(void)
{
struct spi_flash_ctrl *pnor_ctrl = NULL;
struct blocklevel_device *bl = NULL;
int rc;
bool do_mbox;
do_mbox = ast_is_mbox_pnor();
if (do_mbox) {
rc = mbox_flash_init(&bl);
} else {
/* Open controller and flash. If the LPC->AHB doesn't point to
* the PNOR flash base we assume we're booting from BMC system
* memory (or some other place setup by the BMC to support LPC
* FW reads & writes).
*/
if (ast_is_ahb_lpc_pnor())
rc = ast_sf_open(AST_SF_TYPE_PNOR, &pnor_ctrl);
else {
printf("PLAT: Memboot detected\n");
rc = ast_sf_open(AST_SF_TYPE_MEM, &pnor_ctrl);
}
if (rc) {
prerror("PLAT: Failed to open PNOR flash controller\n");
goto fail;
}
rc = flash_init(pnor_ctrl, &bl, NULL);
}
if (rc) {
prerror("PLAT: Failed to open init PNOR driver\n");
goto fail;
}
rc = flash_register(bl);
if (!rc)
return 0;
fail:
if (bl) {
if (do_mbox)
mbox_flash_exit(bl);
else
flash_exit(bl);
}
if (pnor_ctrl)
ast_sf_close(pnor_ctrl);
return rc;
}
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