cmd/adc.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2018 BayLibre, SAS
   4  * Author: Neil Armstrong <narmstrong@baylibre.com>
   5  */
   6 #include <common.h>
   7 #include <command.h>
   8 #include <dm.h>
   9 #include <adc.h>
  10
  11 static int do_adc_list(cmd_tbl_t *cmdtp, int flag, int argc,
  12                        char *const argv[])
  13 {
  14         struct udevice *dev;
  15         int ret;
  16
  17         ret = uclass_first_device_err(UCLASS_ADC, &dev);
  18         if (ret) {
  19                 printf("No available ADC device\n");
  20                 return CMD_RET_FAILURE;
  21         }
  22
  23         do {
  24                 printf("- %s\n", dev->name);
  25
  26                 ret = uclass_next_device(&dev);
  27                 if (ret)
  28                         return CMD_RET_FAILURE;
  29         } while (dev);
  30
  31         return CMD_RET_SUCCESS;
  32 }
  33
  34 static int do_adc_info(cmd_tbl_t *cmdtp, int flag, int argc,
  35                        char *const argv[])
  36 {
  37         struct udevice *dev;
  38         unsigned int data_mask, ch_mask;
  39         int ret, vss, vdd;
  40
  41         if (argc < 2)
  42                 return CMD_RET_USAGE;
  43
  44         ret = uclass_get_device_by_name(UCLASS_ADC, argv[1], &dev);
  45         if (ret) {
  46                 printf("Unknown ADC device %s\n", argv[1]);
  47                 return CMD_RET_FAILURE;
  48         }
  49
  50         printf("ADC Device '%s' :\n", argv[1]);
  51
  52         ret = adc_channel_mask(dev, &ch_mask);
  53         if (!ret)
  54                 printf("channel mask: %x\n", ch_mask);
  55
  56         ret = adc_data_mask(dev, &data_mask);
  57         if (!ret)
  58                 printf("data mask: %x\n", data_mask);
  59
  60         ret = adc_vdd_value(dev, &vdd);
  61         if (!ret)
  62                 printf("vdd: %duV\n", vdd);
  63
  64         ret = adc_vss_value(dev, &vss);
  65         if (!ret)
  66                 printf("vss: %duV\n", vss);
  67
  68         return CMD_RET_SUCCESS;
  69 }
  70
  71 static int do_adc_single(cmd_tbl_t *cmdtp, int flag, int argc,
  72                          char *const argv[])
  73 {
  74         struct udevice *dev;
  75         unsigned int data;
  76         int ret, uV;
  77
  78         if (argc < 3)
  79                 return CMD_RET_USAGE;
  80
  81         ret = adc_channel_single_shot(argv[1], simple_strtol(argv[2], NULL, 0),
  82                                       &data);
  83         if (ret) {
  84                 printf("Error getting single shot for device %s channel %s\n",
  85                        argv[1], argv[2]);
  86                 return CMD_RET_FAILURE;
  87         }
  88
  89         ret = uclass_get_device_by_name(UCLASS_ADC, argv[1], &dev);
  90         if (!ret && !adc_raw_to_uV(dev, data, &uV))
  91                 printf("%u, %d uV\n", data, uV);
  92         else
  93                 printf("%u\n", data);
  94
  95         return CMD_RET_SUCCESS;
  96 }
  97
  98 static int do_adc_scan(cmd_tbl_t *cmdtp, int flag, int argc,
  99                        char *const argv[])
 100 {
 101         struct adc_channel ch[ADC_MAX_CHANNEL];
 102         struct udevice *dev;
 103         unsigned int ch_mask;
 104         int i, chan, ret, uV;
 105
 106         if (argc < 2)
 107                 return CMD_RET_USAGE;
 108
 109         ret = uclass_get_device_by_name(UCLASS_ADC, argv[1], &dev);
 110         if (ret) {
 111                 pr_err("Can't get the ADC %s: %d\n", argv[1], ret);
 112                 return CMD_RET_FAILURE;
 113         }
 114
 115         switch (argc) {
 116         case 3:
 117                 ch_mask = simple_strtoul(argv[2], NULL, 0);
 118                 if (ch_mask)
 119                         break;
 120         case 2:
 121                 ret = adc_channel_mask(dev, &ch_mask);
 122                 if (ret) {
 123                         pr_err("Can't get mask for %s: %d\n", dev->name, ret);
 124                         return CMD_RET_FAILURE;
 125                 }
 126                 break;
 127         }
 128
 129         ret = adc_channels_single_shot(dev->name, ch_mask, ch);
 130         if (ret) {
 131                 pr_err("Can't get single shot for %s (chans mask: 0x%x): %d\n",
 132                        dev->name, ch_mask, ret);
 133                 return CMD_RET_FAILURE;
 134         }
 135
 136         for (chan = 0, i = 0; chan < ADC_MAX_CHANNEL; chan++) {
 137                 if (!(ch_mask & ADC_CHANNEL(chan)))
 138                         continue;
 139                 if (!adc_raw_to_uV(dev, ch[i].data, &uV))
 140                         printf("[%02d]: %u, %d uV\n", ch[i].id, ch[i].data, uV);
 141                 else
 142                         printf("[%02d]: %u\n", ch[i].id, ch[i].data);
 143                 i++;
 144         }
 145
 146         return CMD_RET_SUCCESS;
 147 }
 148
 149 static char adc_help_text[] =
 150         "list - list ADC devices\n"
 151         "adc info <name> - Get ADC device info\n"
 152         "adc single <name> <channel> - Get Single data of ADC device channel\n"
 153         "adc scan <name> [channel mask] - Scan all [or masked] ADC channels";
 154
 155 U_BOOT_CMD_WITH_SUBCMDS(adc, "ADC sub-system", adc_help_text,
 156         U_BOOT_SUBCMD_MKENT(list, 1, 1, do_adc_list),
 157         U_BOOT_SUBCMD_MKENT(info, 2, 1, do_adc_info),
 158         U_BOOT_SUBCMD_MKENT(single, 3, 1, do_adc_single),
 159         U_BOOT_SUBCMD_MKENT(scan, 3, 1, do_adc_scan));