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@@ -0,0 +1,126 @@
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+/* SPDX-License-Identifier: GPL-2.0+
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+ *
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+ * (C) Copyright 2018
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+ * Microchip Technology, Inc.
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+ * Eugen Hristev <eugen.hristev@microchip.com>
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+ */
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+#include <common.h>
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+#include <command.h>
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+#include <w1.h>
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+#include <w1-eeprom.h>
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+#include <dm/device-internal.h>
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+
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+static int w1_bus(void)
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+{
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+ struct udevice *bus, *dev;
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+ int ret;
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+
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+ ret = w1_get_bus(0, &bus);
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+ if (ret) {
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+ printf("one wire interface not found\n");
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+ return CMD_RET_FAILURE;
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+ }
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+ printf("Bus %d:\t%s", bus->seq, bus->name);
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+ if (device_active(bus))
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+ printf(" (active)");
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+ printf("\n");
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+
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+ for (device_find_first_child(bus, &dev);
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+ dev;
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+ device_find_next_child(&dev)) {
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+ ret = device_probe(dev);
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+
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+ printf("\t%s (%d) uclass %s : ", dev->name, dev->seq,
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+ dev->uclass->uc_drv->name);
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+
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+ if (ret)
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+ printf("device error\n");
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+ else
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+ printf("family 0x%x\n", w1_get_device_family(dev));
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+ }
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+ return CMD_RET_SUCCESS;
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+}
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+
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+static int w1_read(int argc, char *const argv[])
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+{
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+ int bus_n = 0, dev_n = 0, offset = 0, len = 512;
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+ int i;
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+ struct udevice *bus, *dev;
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+ int ret;
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+ u8 buf[512];
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+
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+ if (argc > 2)
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+ bus_n = simple_strtoul(argv[2], NULL, 10);
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+
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+ if (argc > 3)
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+ dev_n = simple_strtoul(argv[3], NULL, 10);
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+
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+ if (argc > 4)
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+ offset = simple_strtoul(argv[4], NULL, 10);
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+
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+ if (argc > 5)
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+ len = simple_strtoul(argv[5], NULL, 10);
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+
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+ if (len > 512) {
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+ printf("len needs to be <= 512\n");
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+ return CMD_RET_FAILURE;
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+ }
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+
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+ ret = w1_get_bus(bus_n, &bus);
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+ if (ret) {
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+ printf("one wire interface not found\n");
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+ return CMD_RET_FAILURE;
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+ }
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+
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+ for (device_find_first_child(bus, &dev), i = 0;
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+ dev && i <= dev_n;
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+ device_find_next_child(&dev), i++) {
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+ ret = device_probe(dev);
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+ if (!ret && i == dev_n)
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+ break;
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+ }
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+
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+ if (i != dev_n || ret || !dev) {
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+ printf("invalid dev\n");
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+ return CMD_RET_FAILURE;
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+ }
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+
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+ if (strcmp(dev->uclass->uc_drv->name, "w1_eeprom")) {
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+ printf("the device present on the interface is of unknown device class\n");
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+ return CMD_RET_FAILURE;
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+ }
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+
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+ ret = w1_eeprom_read_buf(dev, offset, (u8 *)buf, len);
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+ if (ret) {
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+ printf("error reading device %s\n", dev->name);
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+ return CMD_RET_FAILURE;
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+ }
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+
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+ for (i = 0; i < len; i++)
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+ printf("%x", buf[i]);
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+ printf("\n");
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+
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+ return CMD_RET_SUCCESS;
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+}
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+
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+int do_w1(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
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+{
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+ if (argc < 2)
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+ return CMD_RET_USAGE;
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+
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+ if (!strcmp(argv[1], "bus"))
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+ return w1_bus();
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+
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+ if (!strcmp(argv[1], "read"))
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+ return w1_read(argc, argv);
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+
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+ return CMD_RET_SUCCESS;
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+}
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+
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+U_BOOT_CMD(w1, 6, 0, do_w1,
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+ "onewire interface utility commands",
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+ "bus - show onewire bus info (all)\n"
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+ "w1 read [<bus> [<dev> [offset [length]]]]"
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+ " - read from onewire device 'dev' on onewire bus 'bus'"
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+ " starting from offset 'offset' and length 'length'\n"
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+ " defaults: bus 0, dev 0, offset 0, length 512 bytes.");
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