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authorSascha Hauer <s.hauer@pengutronix.de>2013-04-17 11:10:43 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2013-04-17 13:36:31 +0200
commite10c1845b2351099c2097fe29629983002b63a37 (patch)
tree5def9d940a6553f02b01c9eb09fb3575a80037bc /commands/mw.c
parent81c118aa9e2090d7bca7f164c6917ae2912d31ff (diff)
downloadbarebox-e10c1845b2351099c2097fe29629983002b63a37.tar.gz
memory commands: separate into one file per command
Normally in commands we have one file per command which is named like the command itself. The memory commands are an exception to this. This patch changes this by separating the memory commands. This also has the effect that the memory commands can now be selected individually. Along the way we add some Kconfig help text for the commmands. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'commands/mw.c')
-rw-r--r--commands/mw.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/commands/mw.c b/commands/mw.c
new file mode 100644
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+++ b/commands/mw.c
@@ -0,0 +1,104 @@
+/*
+ * 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>
+
+static int do_mem_mw(int argc, char *argv[])
+{
+ int ret = 0;
+ int fd;
+ char *filename = "/dev/mem";
+ int mode = O_RWSIZE_4;
+ loff_t adr;
+ int swab = 0;
+
+ if (mem_parse_options(argc, argv, "bwld:x", &mode, NULL, &filename,
+ &swab) < 0)
+ return 1;
+
+ if (optind + 1 >= argc)
+ return COMMAND_ERROR_USAGE;
+
+ adr = strtoull_suffix(argv[optind++], NULL, 0);
+
+ fd = open_and_lseek(filename, mode | O_WRONLY, adr);
+ if (fd < 0)
+ return 1;
+
+ while (optind < argc) {
+ u8 val8;
+ u16 val16;
+ u32 val32;
+ switch (mode) {
+ case O_RWSIZE_1:
+ val8 = simple_strtoul(argv[optind], NULL, 0);
+ ret = write(fd, &val8, 1);
+ break;
+ case O_RWSIZE_2:
+ val16 = simple_strtoul(argv[optind], NULL, 0);
+ if (swab)
+ val16 = __swab16(val16);
+ ret = write(fd, &val16, 2);
+ break;
+ case O_RWSIZE_4:
+ val32 = simple_strtoul(argv[optind], NULL, 0);
+ if (swab)
+ val32 = __swab32(val32);
+ ret = write(fd, &val32, 4);
+ break;
+ }
+ if (ret < 0) {
+ perror("write");
+ break;
+ }
+ ret = 0;
+ optind++;
+ }
+
+ close(fd);
+
+ return ret ? 1 : 0;
+}
+
+static const __maybe_unused char cmd_mw_help[] =
+"Usage: mw [OPTIONS] <region> <value(s)>\n"
+"Write value(s) to the specifies region.\n"
+"options:\n"
+" -b, -w, -l use byte, halfword, or word accesses\n"
+" -d <file> write file (default /dev/mem)\n";
+
+BAREBOX_CMD_START(mw)
+ .cmd = do_mem_mw,
+ .usage = "memory write (fill)",
+ BAREBOX_CMD_HELP(cmd_mw_help)
+BAREBOX_CMD_END