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Software for White Rabbit PTP Core
Commit 3ff9dac6 authored by Alessandro Rubini's avatar Alessandro Rubini Committed by Grzegorz Daniluk
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dev/flash.c: initial trivial cleanup 

- Turn the copyright header to the local convention
- fix a little white space
- fix flash_sdb_check (must return error -- but it's unused)
Signed-off-by: Alessandro Rubini's avatarAlessandro Rubini <rubini@gnudd.com>
parent 3d2a24cc
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Showing with 25 additions and 79 deletions
dev/flash.c
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/*
*==============================================================================
* CERN (BE-CO-HT)
* Source file for M25P flash controller
*==============================================================================
* This work is part of the White Rabbit project
*
* author: Theodor Stana (t.stana@cern.ch)
* Copyright (C) 2013 CERN (www.cern.ch)
* Author: Theodor Stana <t.stana@cern.ch>
*
* date of creation: 2013-09-25
*
* version: 1.0
*
* description:
* This file provides interface functions to access the M25P32 flash chip
* on-board SPEC cards. These functions can also be used to access other
* flash chips from the M25P family, such as the M25P128 available on the
* SVEC cards.
*
* Apart from that, it offers functions for working with an SDB file system
* present on such chips. The file-system must previously be created using
* the gensdbfs tool [1], and uploaded by writing to the flash, using the
* flash-write tool [2]. Then, the SDB file system can be checked using
* the flash_sdb_check function below.
*
* dependencies:
* libsdbfs.h - the SDBFS library providing the SDB file system structure and
* functions to scan for an SDB file system
* syscon.h - contains the low-level GPIO access functions
*
* references:
* [1] - Alessandro Rubini -- A Flash file-system based on SDB data
* Structures, Sept. 2012
* http://www.ohwr.org/attachments/download/1594/sdbfs-2012-09-19.pdf
* [2] - sdbfs.README file, obtained by downloading the repository at
* http://www.ohwr.org/projects/wrpc-sw/repository
* and navigating to the tools/ folder
*
*==============================================================================
* GNU LESSER GENERAL PUBLIC LICENSE
*==============================================================================
* This source file is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by the
* Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version. This source 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 Lesser General Public License for more details. You should have
* received a copy of the GNU Lesser General Public License along with this
* source; if not, download it from http://www.gnu.org/licenses/lgpl-2.1.html
*==============================================================================
* last changes:
* 2013-09-25 Theodor Stana t.stana@cern.ch File created
*==============================================================================
* TODO: -
*==============================================================================
* Released according to the GNU LGPL, version 2.1 or any later version.
*/
#include "flash.h"
#include "types.h"
#include "syscon.h"
#define SDBFS_BIG_ENDIAN
#include "libsdbfs.h"
#include <wrc.h>
#include <flash.h>
#include <types.h>
/*****************************************************************************/
/* Flash interface */
/*****************************************************************************/
#define SDBFS_BIG_ENDIAN
#include <libsdbfs.h>
/*
* Delay function - limit SPI clock speed to 10 MHz
......@@ -84,14 +29,14 @@ static void delay()
static uint8_t bbspi_transfer(int cspin, uint8_t val)
{
int i;
gpio_out(GPIO_SPI_NCS, cspin);
delay();
for (i = 0; i < 8; i++) {
gpio_out(GPIO_SPI_SCLK, 0);
if (val & 0x80) {
gpio_out(GPIO_SPI_MOSI, 1);
}
else {
} else {
gpio_out(GPIO_SPI_MOSI, 0);
}
delay();
......@@ -234,7 +179,7 @@ static void flash_sdb_list(struct sdbfs *fs)
int new = 1;
while ( (d = sdbfs_scan(fs, new)) != NULL) {
d->sdb_component.product.record_type = '\0';
mprintf("file 0x%08x @ %4i, name %s\n",
pp_printf("file 0x%08x @ %4i, name %19s\n",
(int)(d->sdb_component.product.device_id),
(int)(d->sdb_component.addr_first),
(char *)(d->sdb_component.product.name));
......@@ -250,12 +195,12 @@ int flash_sdb_check()
uint32_t magic = 0;
int i;
uint32_t entry_point[6] = {
uint32_t entry_point[] = {
0x000000, // flash base
0x100, // second page in flash
0x200, // IPMI with MultiRecord
0x300, // IPMI with larger MultiRecord
0x170000, // after first FPGA bitstream
0x100, // second page in flash
0x200, // IPMI with MultiRecord
0x300, // IPMI with larger MultiRecord
0x170000, // after first FPGA bitstream
0x2e0000 // after MultiBoot bitstream
};
......@@ -264,13 +209,14 @@ int flash_sdb_check()
if (magic == SDB_MAGIC)
break;
}
if (magic == SDB_MAGIC) {
mprintf("Found SDB magic at address 0x%06X!\n", entry_point[i]);
wrc_sdb.drvdata = NULL;
wrc_sdb.entrypoint = entry_point[i];
wrc_sdb.read = sdb_flash_read;
wrc_sdb.write = sdb_flash_write;
flash_sdb_list(&wrc_sdb);
}
if (i == ARRAY_SIZE(entry_point))
return -1;
pp_printf("Found SDB magic at address 0x%06x\n", entry_point[i]);
wrc_sdb.drvdata = NULL;
wrc_sdb.entrypoint = entry_point[i];
wrc_sdb.read = sdb_flash_read;
wrc_sdb.write = sdb_flash_write;
flash_sdb_list(&wrc_sdb);
return 0;
}
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