1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2018 BayLibre, SAS
4 * Author: Neil Armstrong <narmstrong@baylibre.com>
5 */
6 #include <command.h>
7 #include <dm.h>
8 #include <env.h>
9 #include <adc.h>
10 #include <linux/printk.h>
11
do_adc_list(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])12 static int do_adc_list(struct cmd_tbl *cmdtp, int flag, int argc,
13 char *const argv[])
14 {
15 struct udevice *dev;
16 int ret, err;
17
18 ret = err = uclass_first_device_check(UCLASS_ADC, &dev);
19
20 while (dev) {
21 printf("- %s status: %i\n", dev->name, ret);
22
23 ret = uclass_next_device_check(&dev);
24 if (ret)
25 err = ret;
26 }
27
28 return err ? CMD_RET_FAILURE : CMD_RET_SUCCESS;
29 }
30
do_adc_info(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])31 static int do_adc_info(struct cmd_tbl *cmdtp, int flag, int argc,
32 char *const argv[])
33 {
34 struct udevice *dev;
35 unsigned int data_mask, ch_mask;
36 int ret, vss, vdd;
37
38 if (argc < 2)
39 return CMD_RET_USAGE;
40
41 ret = uclass_get_device_by_name(UCLASS_ADC, argv[1], &dev);
42 if (ret) {
43 printf("Unknown ADC device %s\n", argv[1]);
44 return CMD_RET_FAILURE;
45 }
46
47 printf("ADC Device '%s' :\n", argv[1]);
48
49 ret = adc_channel_mask(dev, &ch_mask);
50 if (!ret)
51 printf("channel mask: %x\n", ch_mask);
52
53 ret = adc_data_mask(dev, &data_mask);
54 if (!ret)
55 printf("data mask: %x\n", data_mask);
56
57 ret = adc_vdd_value(dev, &vdd);
58 if (!ret)
59 printf("vdd: %duV\n", vdd);
60
61 ret = adc_vss_value(dev, &vss);
62 if (!ret)
63 printf("vss: %duV\n", vss);
64
65 return CMD_RET_SUCCESS;
66 }
67
do_adc_single(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])68 static int do_adc_single(struct cmd_tbl *cmdtp, int flag, int argc,
69 char *const argv[])
70 {
71 char *varname = NULL;
72 struct udevice *dev;
73 unsigned int data;
74 int ret, uV, val;
75
76 if (argc < 3)
77 return CMD_RET_USAGE;
78
79 if (argc >= 4)
80 varname = argv[3];
81
82 ret = adc_channel_single_shot(argv[1], simple_strtol(argv[2], NULL, 0),
83 &data);
84 if (ret) {
85 printf("Error getting single shot for device %s channel %s (ret=%d)\n",
86 argv[1], argv[2], ret);
87 return CMD_RET_FAILURE;
88 }
89
90 ret = uclass_get_device_by_name(UCLASS_ADC, argv[1], &dev);
91 if (!ret && !adc_raw_to_uV(dev, data, &uV)) {
92 val = uV;
93 printf("%u, %d uV\n", data, uV);
94 } else {
95 val = data;
96 printf("%u\n", data);
97 }
98
99 if (varname)
100 env_set_ulong(varname, val);
101
102 return CMD_RET_SUCCESS;
103 }
104
do_adc_scan(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])105 static int do_adc_scan(struct cmd_tbl *cmdtp, int flag, int argc,
106 char *const argv[])
107 {
108 struct adc_channel ch[ADC_MAX_CHANNEL];
109 struct udevice *dev;
110 unsigned int ch_mask;
111 int i, chan, ret, uV;
112
113 if (argc < 2)
114 return CMD_RET_USAGE;
115
116 ret = uclass_get_device_by_name(UCLASS_ADC, argv[1], &dev);
117 if (ret) {
118 pr_err("Can't get the ADC %s: %d\n", argv[1], ret);
119 return CMD_RET_FAILURE;
120 }
121
122 switch (argc) {
123 case 3:
124 ch_mask = simple_strtoul(argv[2], NULL, 0);
125 if (ch_mask)
126 break;
127 case 2:
128 ret = adc_channel_mask(dev, &ch_mask);
129 if (ret) {
130 pr_err("Can't get mask for %s: %d\n", dev->name, ret);
131 return CMD_RET_FAILURE;
132 }
133 break;
134 }
135
136 ret = adc_channels_single_shot(dev->name, ch_mask, ch);
137 if (ret) {
138 pr_err("Can't get single shot for %s (chans mask: 0x%x): %d\n",
139 dev->name, ch_mask, ret);
140 return CMD_RET_FAILURE;
141 }
142
143 for (chan = 0, i = 0; chan < ADC_MAX_CHANNEL; chan++) {
144 if (!(ch_mask & ADC_CHANNEL(chan)))
145 continue;
146 if (!adc_raw_to_uV(dev, ch[i].data, &uV))
147 printf("[%02d]: %u, %d uV\n", ch[i].id, ch[i].data, uV);
148 else
149 printf("[%02d]: %u\n", ch[i].id, ch[i].data);
150 i++;
151 }
152
153 return CMD_RET_SUCCESS;
154 }
155
156 U_BOOT_LONGHELP(adc,
157 "list - list ADC devices\n"
158 "adc info <name> - Get ADC device info\n"
159 "adc single <name> <channel> [varname] - Get Single data of ADC device channel\n"
160 "adc scan <name> [channel mask] - Scan all [or masked] ADC channels\n");
161
162 U_BOOT_CMD_WITH_SUBCMDS(adc, "ADC sub-system", adc_help_text,
163 U_BOOT_SUBCMD_MKENT(list, 1, 1, do_adc_list),
164 U_BOOT_SUBCMD_MKENT(info, 2, 1, do_adc_info),
165 U_BOOT_SUBCMD_MKENT(single, 4, 1, do_adc_single),
166 U_BOOT_SUBCMD_MKENT(scan, 3, 1, do_adc_scan));
167