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7#include <common.h>
8#include <command.h>
9#include <dm.h>
10#include <w1.h>
11#include <w1-eeprom.h>
12#include <dm/device-internal.h>
13
14static int w1_bus(void)
15{
16 struct udevice *bus, *dev;
17 int ret;
18
19 ret = w1_get_bus(0, &bus);
20 if (ret) {
21 printf("one wire interface not found\n");
22 return CMD_RET_FAILURE;
23 }
24 printf("Bus %d:\t%s", dev_seq(bus), bus->name);
25 if (device_active(bus))
26 printf(" (active)");
27 printf("\n");
28
29 for (device_find_first_child(bus, &dev);
30 dev;
31 device_find_next_child(&dev)) {
32 ret = device_probe(dev);
33
34 printf("\t%s (%d) uclass %s : ", dev->name, dev_seq(dev),
35 dev->uclass->uc_drv->name);
36
37 if (ret)
38 printf("device error\n");
39 else
40 printf("family 0x%x\n", w1_get_device_family(dev));
41 }
42 return CMD_RET_SUCCESS;
43}
44
45static int w1_read(int argc, char *const argv[])
46{
47 int bus_n = 0, dev_n = 0, offset = 0, len = 512;
48 int i;
49 struct udevice *bus, *dev;
50 int ret;
51 u8 buf[512];
52
53 if (argc > 2)
54 bus_n = dectoul(argv[2], NULL);
55
56 if (argc > 3)
57 dev_n = dectoul(argv[3], NULL);
58
59 if (argc > 4)
60 offset = dectoul(argv[4], NULL);
61
62 if (argc > 5)
63 len = dectoul(argv[5], NULL);
64
65 if (len > 512) {
66 printf("len needs to be <= 512\n");
67 return CMD_RET_FAILURE;
68 }
69
70 ret = w1_get_bus(bus_n, &bus);
71 if (ret) {
72 printf("one wire interface not found\n");
73 return CMD_RET_FAILURE;
74 }
75
76 for (device_find_first_child(bus, &dev), i = 0;
77 dev && i <= dev_n;
78 device_find_next_child(&dev), i++) {
79 ret = device_probe(dev);
80 if (!ret && i == dev_n)
81 break;
82 }
83
84 if (i != dev_n || ret || !dev) {
85 printf("invalid dev\n");
86 return CMD_RET_FAILURE;
87 }
88
89 if (strcmp(dev->uclass->uc_drv->name, "w1_eeprom")) {
90 printf("the device present on the interface is of unknown device class\n");
91 return CMD_RET_FAILURE;
92 }
93
94 ret = w1_eeprom_read_buf(dev, offset, (u8 *)buf, len);
95 if (ret) {
96 printf("error reading device %s\n", dev->name);
97 return CMD_RET_FAILURE;
98 }
99
100 for (i = 0; i < len; i++)
101 printf("%x", buf[i]);
102 printf("\n");
103
104 return CMD_RET_SUCCESS;
105}
106
107int do_w1(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
108{
109 if (argc < 2)
110 return CMD_RET_USAGE;
111
112 if (!strcmp(argv[1], "bus"))
113 return w1_bus();
114
115 if (!strcmp(argv[1], "read"))
116 return w1_read(argc, argv);
117
118 return CMD_RET_SUCCESS;
119}
120
121U_BOOT_CMD(w1, 6, 0, do_w1,
122 "onewire interface utility commands",
123 "bus - show onewire bus info (all)\n"
124 "w1 read [<bus> [<dev> [offset [length]]]]"
125 " - read from onewire device 'dev' on onewire bus 'bus'"
126 " starting from offset 'offset' and length 'length'\n"
127 " defaults: bus 0, dev 0, offset 0, length 512 bytes.");
128
