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/*
* Copyright (c) 2011 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program 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 General Public License for more details.
*
*/
/*
* Memory Functions
*
* Copied from FADS ROM, Dan Malek (dmalek@jlc.net)
*/
#include <common.h>
#include <command.h>
#include <init.h>
#include <driver.h>
#include <malloc.h>
#include <errno.h>
#include <fs.h>
#include <fcntl.h>
#include <getopt.h>
#include <linux/stat.h>
#include <xfuncs.h>
#ifdef CMD_MEM_DEBUG
#define PRINTF(fmt,args...) printf (fmt ,##args)
#else
#define PRINTF(fmt,args...)
#endif
char *mem_rw_buf;
static char *DEVMEM = "/dev/mem";
int open_and_lseek(const char *filename, int mode, loff_t pos)
{
int fd, ret;
fd = open(filename, mode | O_RDONLY);
if (fd < 0) {
perror("open");
return fd;
}
if (!pos)
return fd;
ret = lseek(fd, pos, SEEK_SET);
if (ret == -1) {
perror("lseek");
close(fd);
return -errno;
}
return fd;
}
/*
* Common function for parsing options for the 'md', 'mw', 'memcpy', 'memcmp'
* commands.
*/
int mem_parse_options(int argc, char *argv[], char *optstr, int *mode,
char **sourcefile, char **destfile, int *swab)
{
int opt;
while((opt = getopt(argc, argv, optstr)) > 0) {
switch(opt) {
case 'b':
*mode = O_RWSIZE_1;
break;
case 'w':
*mode = O_RWSIZE_2;
break;
case 'l':
*mode = O_RWSIZE_4;
break;
case 's':
*sourcefile = optarg;
break;
case 'd':
*destfile = optarg;
break;
case 'x':
*swab = 1;
break;
default:
return -1;
}
}
return 0;
}
static struct file_operations memops = {
.read = mem_read,
.write = mem_write,
.memmap = generic_memmap_rw,
.lseek = dev_lseek_default,
};
static int mem_probe(struct device_d *dev)
{
struct cdev *cdev;
cdev = xzalloc(sizeof (*cdev));
dev->priv = cdev;
cdev->name = (char*)dev->resource[0].name;
cdev->size = (unsigned long)resource_size(&dev->resource[0]);
cdev->ops = &memops;
cdev->dev = dev;
devfs_create(cdev);
return 0;
}
static struct driver_d mem_drv = {
.name = "mem",
.probe = mem_probe,
};
static int mem_init(void)
{
mem_rw_buf = malloc(RW_BUF_SIZE);
if(!mem_rw_buf)
return -ENOMEM;
add_mem_device("mem", 0, ~0, IORESOURCE_MEM_WRITEABLE);
return platform_driver_register(&mem_drv);
}
device_initcall(mem_init);
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