Eugen Hristev | d05266f | 2018-09-18 10:35:33 +0300 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0+ |
| 2 | * |
| 3 | * (C) Copyright 2018 |
| 4 | * Microchip Technology, Inc. |
| 5 | * Eugen Hristev <eugen.hristev@microchip.com> |
| 6 | */ |
| 7 | #include <common.h> |
| 8 | #include <command.h> |
| 9 | #include <w1.h> |
| 10 | #include <w1-eeprom.h> |
| 11 | #include <dm/device-internal.h> |
| 12 | |
| 13 | static int w1_bus(void) |
| 14 | { |
| 15 | struct udevice *bus, *dev; |
| 16 | int ret; |
| 17 | |
| 18 | ret = w1_get_bus(0, &bus); |
| 19 | if (ret) { |
| 20 | printf("one wire interface not found\n"); |
| 21 | return CMD_RET_FAILURE; |
| 22 | } |
| 23 | printf("Bus %d:\t%s", bus->seq, bus->name); |
| 24 | if (device_active(bus)) |
| 25 | printf(" (active)"); |
| 26 | printf("\n"); |
| 27 | |
| 28 | for (device_find_first_child(bus, &dev); |
| 29 | dev; |
| 30 | device_find_next_child(&dev)) { |
| 31 | ret = device_probe(dev); |
| 32 | |
| 33 | printf("\t%s (%d) uclass %s : ", dev->name, dev->seq, |
| 34 | dev->uclass->uc_drv->name); |
| 35 | |
| 36 | if (ret) |
| 37 | printf("device error\n"); |
| 38 | else |
| 39 | printf("family 0x%x\n", w1_get_device_family(dev)); |
| 40 | } |
| 41 | return CMD_RET_SUCCESS; |
| 42 | } |
| 43 | |
| 44 | static int w1_read(int argc, char *const argv[]) |
| 45 | { |
| 46 | int bus_n = 0, dev_n = 0, offset = 0, len = 512; |
| 47 | int i; |
| 48 | struct udevice *bus, *dev; |
| 49 | int ret; |
| 50 | u8 buf[512]; |
| 51 | |
| 52 | if (argc > 2) |
| 53 | bus_n = simple_strtoul(argv[2], NULL, 10); |
| 54 | |
| 55 | if (argc > 3) |
| 56 | dev_n = simple_strtoul(argv[3], NULL, 10); |
| 57 | |
| 58 | if (argc > 4) |
| 59 | offset = simple_strtoul(argv[4], NULL, 10); |
| 60 | |
| 61 | if (argc > 5) |
| 62 | len = simple_strtoul(argv[5], NULL, 10); |
| 63 | |
| 64 | if (len > 512) { |
| 65 | printf("len needs to be <= 512\n"); |
| 66 | return CMD_RET_FAILURE; |
| 67 | } |
| 68 | |
| 69 | ret = w1_get_bus(bus_n, &bus); |
| 70 | if (ret) { |
| 71 | printf("one wire interface not found\n"); |
| 72 | return CMD_RET_FAILURE; |
| 73 | } |
| 74 | |
| 75 | for (device_find_first_child(bus, &dev), i = 0; |
| 76 | dev && i <= dev_n; |
| 77 | device_find_next_child(&dev), i++) { |
| 78 | ret = device_probe(dev); |
| 79 | if (!ret && i == dev_n) |
| 80 | break; |
| 81 | } |
| 82 | |
| 83 | if (i != dev_n || ret || !dev) { |
| 84 | printf("invalid dev\n"); |
| 85 | return CMD_RET_FAILURE; |
| 86 | } |
| 87 | |
| 88 | if (strcmp(dev->uclass->uc_drv->name, "w1_eeprom")) { |
| 89 | printf("the device present on the interface is of unknown device class\n"); |
| 90 | return CMD_RET_FAILURE; |
| 91 | } |
| 92 | |
| 93 | ret = w1_eeprom_read_buf(dev, offset, (u8 *)buf, len); |
| 94 | if (ret) { |
| 95 | printf("error reading device %s\n", dev->name); |
| 96 | return CMD_RET_FAILURE; |
| 97 | } |
| 98 | |
| 99 | for (i = 0; i < len; i++) |
| 100 | printf("%x", buf[i]); |
| 101 | printf("\n"); |
| 102 | |
| 103 | return CMD_RET_SUCCESS; |
| 104 | } |
| 105 | |
| 106 | int do_w1(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) |
| 107 | { |
| 108 | if (argc < 2) |
| 109 | return CMD_RET_USAGE; |
| 110 | |
| 111 | if (!strcmp(argv[1], "bus")) |
| 112 | return w1_bus(); |
| 113 | |
| 114 | if (!strcmp(argv[1], "read")) |
| 115 | return w1_read(argc, argv); |
| 116 | |
| 117 | return CMD_RET_SUCCESS; |
| 118 | } |
| 119 | |
| 120 | U_BOOT_CMD(w1, 6, 0, do_w1, |
| 121 | "onewire interface utility commands", |
| 122 | "bus - show onewire bus info (all)\n" |
| 123 | "w1 read [<bus> [<dev> [offset [length]]]]" |
| 124 | " - read from onewire device 'dev' on onewire bus 'bus'" |
| 125 | " starting from offset 'offset' and length 'length'\n" |
| 126 | " defaults: bus 0, dev 0, offset 0, length 512 bytes."); |