110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
/*
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* Copyright (c) 2011 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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/*
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* Memory Functions
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*
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* Copied from FADS ROM, Dan Malek (dmalek@jlc.net)
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*/
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#include <common.h>
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#include <command.h>
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#include <init.h>
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#include <driver.h>
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#include <malloc.h>
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#include <errno.h>
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#include <fs.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <linux/stat.h>
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#include <xfuncs.h>
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static int do_mem_mw(int argc, char *argv[])
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{
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int ret = 0;
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int fd;
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char *filename = "/dev/mem";
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int mode = O_RWSIZE_4;
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loff_t adr;
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int swab = 0;
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if (mem_parse_options(argc, argv, "bwld:x", &mode, NULL, &filename,
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&swab) < 0)
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return 1;
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if (optind + 1 >= argc)
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return COMMAND_ERROR_USAGE;
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adr = strtoull_suffix(argv[optind++], NULL, 0);
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fd = open_and_lseek(filename, mode | O_WRONLY, adr);
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if (fd < 0)
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return 1;
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while (optind < argc) {
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u8 val8;
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u16 val16;
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u32 val32;
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switch (mode) {
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case O_RWSIZE_1:
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val8 = simple_strtoul(argv[optind], NULL, 0);
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ret = write(fd, &val8, 1);
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break;
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case O_RWSIZE_2:
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val16 = simple_strtoul(argv[optind], NULL, 0);
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if (swab)
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val16 = __swab16(val16);
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ret = write(fd, &val16, 2);
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break;
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case O_RWSIZE_4:
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val32 = simple_strtoul(argv[optind], NULL, 0);
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if (swab)
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val32 = __swab32(val32);
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ret = write(fd, &val32, 4);
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break;
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}
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if (ret < 0) {
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perror("write");
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break;
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}
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ret = 0;
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optind++;
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}
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close(fd);
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return ret ? 1 : 0;
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}
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BAREBOX_CMD_HELP_START(mw)
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BAREBOX_CMD_HELP_TEXT("Write DATA value(s) to the specified REGION.")
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BAREBOX_CMD_HELP_TEXT("")
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BAREBOX_CMD_HELP_TEXT("Options:")
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BAREBOX_CMD_HELP_OPT ("-b", "byte access")
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BAREBOX_CMD_HELP_OPT ("-w", "word access (16 bit)")
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BAREBOX_CMD_HELP_OPT ("-l", "long access (32 bit)")
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BAREBOX_CMD_HELP_OPT ("-d FILE", "write file (default /dev/mem)")
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BAREBOX_CMD_HELP_END
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BAREBOX_CMD_START(mw)
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.cmd = do_mem_mw,
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BAREBOX_CMD_DESC("memory write")
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BAREBOX_CMD_OPTS("[-bwld] REGION DATA...")
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BAREBOX_CMD_GROUP(CMD_GRP_MEM)
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BAREBOX_CMD_HELP(cmd_mw_help)
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BAREBOX_CMD_END
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