From: Bin Meng <bin.meng at windriver.com>
Enable the command "misc" for accessing miscellaneous devices with
a MISC uclass driver. The command provides listing all MISC devices
as well as read and write functionalities via their drivers.
Signed-off-by: Bin Meng <bin.meng at windriver.com>
---
This patch depends on http://patchwork.ozlabs.org/project/uboot/list/?series=207559
cmd/Kconfig | 8 ++++
cmd/Makefile | 1 +
cmd/misc.c | 134 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 143 insertions(+)
create mode 100644 cmd/misc.c
diff --git a/cmd/Kconfig b/cmd/Kconfig
index d4427a7..257d548 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -1025,6 +1025,14 @@ config CMD_LSBLK
Print list of available block device drivers, and for each, the list
of known block devices.
+config CMD_MISC
+ bool "misc"
+ depends on MISC
+ help
+ Enable the command "misc" for accessing miscellaneous devices with
+ a MISC uclass driver. The command provides listing all MISC devices
+ as well as read and write functionalities via their drivers.
+
config CMD_MMC
bool "mmc"
help
diff --git a/cmd/Makefile b/cmd/Makefile
index c536a3e..4b46798 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -94,6 +94,7 @@ obj-$(CONFIG_CMD_MEMORY) += mem.o
obj-$(CONFIG_CMD_IO) += io.o
obj-$(CONFIG_CMD_MFSL) += mfsl.o
obj-$(CONFIG_CMD_MII) += mii.o
+obj-$(CONFIG_CMD_MISC) += misc.o
obj-$(CONFIG_CMD_MDIO) += mdio.o
obj-$(CONFIG_CMD_SLEEP) += sleep.o
obj-$(CONFIG_CMD_MMC) += mmc.o
diff --git a/cmd/misc.c b/cmd/misc.c
new file mode 100644
index 0000000..653deed
--- /dev/null
+++ b/cmd/misc.c
@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2020 Wind River Systems, Inc.
+ *
+ * Author:
+ * Bin Meng <bin.meng at windriver.com>
+ *
+ * A command interface to access misc devices with MISC uclass driver APIs.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <dm.h>
+#include <errno.h>
+#include <misc.h>
+
+enum misc_op {
+ MISC_OP_READ,
+ MISC_OP_WRITE
+};
+
+static char *misc_op_str[] = {
+ "read",
+ "write"
+};
+
+static int do_misc_list(struct cmd_tbl *cmdtp, int flag,
+ int argc, char *const argv[])
+{
+ struct udevice *dev;
+
+ printf("Device Index Driver\n");
+ printf("-------------------------------------\n");
+ for (uclass_first_device(UCLASS_MISC, &dev);
+ dev;
+ uclass_next_device(&dev)) {
+ printf("%-20s %5d %10s\n", dev->name, dev->seq,
+ dev->driver->name);
+ }
+
+ return 0;
+}
+
+static int do_misc_op(struct cmd_tbl *cmdtp, int flag,
+ int argc, char *const argv[], enum misc_op op)
+{
+ int (*misc_op)(struct udevice *, int, void *, int);
+ struct udevice *dev;
+ int offset;
+ void *buf;
+ int size;
+ int ret;
+
+ ret = uclass_get_device_by_name(UCLASS_MISC, argv[0], &dev);
+ if (ret) {
+ printf("Unable to find device %s\n", argv[0]);
+ return ret;
+ }
+
+ offset = simple_strtoul(argv[1], NULL, 16);
+ buf = (void *)simple_strtoul(argv[2], NULL, 16);
+ size = simple_strtoul(argv[3], NULL, 16);
+
+ if (op == MISC_OP_READ)
+ misc_op = misc_read;
+ else
+ misc_op = misc_write;
+
+ ret = misc_op(dev, offset, buf, size);
+ if (ret < 0) {
+ if (ret == -ENOSYS) {
+ printf("The device does not support %s\n",
+ misc_op_str[op]);
+ ret = 0;
+ }
+ } else {
+ if (ret == size)
+ ret = 0;
+ else
+ printf("Partially %s %d bytes\n", misc_op_str[op], ret);
+ }
+
+ return ret;
+}
+
+static int do_misc_read(struct cmd_tbl *cmdtp, int flag,
+ int argc, char *const argv[])
+{
+ return do_misc_op(cmdtp, flag, argc, argv, MISC_OP_READ);
+}
+
+static int do_misc_write(struct cmd_tbl *cmdtp, int flag,
+ int argc, char *const argv[])
+{
+ return do_misc_op(cmdtp, flag, argc, argv, MISC_OP_WRITE);
+}
+
+static struct cmd_tbl misc_commands[] = {
+ U_BOOT_CMD_MKENT(list, 0, 1, do_misc_list, "", ""),
+ U_BOOT_CMD_MKENT(read, 4, 1, do_misc_read, "", ""),
+ U_BOOT_CMD_MKENT(write, 4, 1, do_misc_write, "", ""),
+};
+
+static int do_misc(struct cmd_tbl *cmdtp, int flag,
+ int argc, char *const argv[])
+{
+ struct cmd_tbl *misc_cmd;
+ int ret;
+
+ if (argc < 2)
+ return CMD_RET_USAGE;
+ misc_cmd = find_cmd_tbl(argv[1], misc_commands,
+ ARRAY_SIZE(misc_commands));
+ argc -= 2;
+ argv += 2;
+ if (!misc_cmd || argc != misc_cmd->maxargs)
+ return CMD_RET_USAGE;
+
+ ret = misc_cmd->cmd(misc_cmd, flag, argc, argv);
+
+ return cmd_process_error(misc_cmd, ret);
+}
+
+U_BOOT_CMD(
+ misc, 6, 1, do_misc,
+ "Access miscellaneous devices with MISC uclass driver APIs",
+ "list - list all miscellaneous devices\n"
+ "misc read name offset addr len - read `len' bytes starting at\n"
+ " `offset' of device `name'\n"
+ " to memory at `addr'\n"
+ "misc write name offset addr len - write `len' bytes starting at\n"
+ " `offset' of device `name'\n"
+ " from memory at `addr'"
+);
--
2.7.4