cmd/pmic.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2014-2015 Samsung Electronics
   4  * Przemyslaw Marczak <p.marczak@samsung.com>
   5  */
   6 #include <common.h>
   7 #include <command.h>
   8 #include <errno.h>
   9 #include <dm.h>
  10 #include <dm/uclass-internal.h>
  11 #include <power/pmic.h>
  12
  13 #define LIMIT_DEV       32
  14 #define LIMIT_PARENT    20
  15
  16 static struct udevice *currdev;
  17
  18 static int failure(int ret)
  19 {
  20         printf("Error: %d (%s)\n", ret, errno_str(ret));
  21
  22         return CMD_RET_FAILURE;
  23 }
  24
  25 static int do_dev(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
  26 {
  27         char *name;
  28         int ret = -ENODEV;
  29
  30         switch (argc) {
  31         case 2:
  32                 name = argv[1];
  33                 ret = pmic_get(name, &currdev);
  34                 if (ret) {
  35                         printf("Can't get PMIC: %s!\n", name);
  36                         return failure(ret);
  37                 }
  38         case 1:
  39                 if (!currdev) {
  40                         printf("PMIC device is not set!\n\n");
  41                         return CMD_RET_USAGE;
  42                 }
  43
  44                 printf("dev: %d @ %s\n", dev_seq(currdev), currdev->name);
  45         }
  46
  47         return CMD_RET_SUCCESS;
  48 }
  49
  50 static int do_list(struct cmd_tbl *cmdtp, int flag, int argc,
  51                    char *const argv[])
  52 {
  53         struct udevice *dev;
  54         int ret, err = 0;
  55
  56         printf("| %-*.*s| %-*.*s| %s @ %s\n",
  57                LIMIT_DEV, LIMIT_DEV, "Name",
  58                LIMIT_PARENT, LIMIT_PARENT, "Parent name",
  59                "Parent uclass", "seq");
  60
  61         for (ret = uclass_first_device_check(UCLASS_PMIC, &dev); dev;
  62              ret = uclass_next_device_check(&dev)) {
  63                 if (ret)
  64                         err = ret;
  65
  66                 printf("| %-*.*s| %-*.*s| %s @ %d | status: %i\n",
  67                        LIMIT_DEV, LIMIT_DEV, dev->name,
  68                        LIMIT_PARENT, LIMIT_PARENT, dev->parent->name,
  69                        dev_get_uclass_name(dev->parent), dev_seq(dev->parent),
  70                        ret);
  71         }
  72
  73         if (err)
  74                 return CMD_RET_FAILURE;
  75
  76         return CMD_RET_SUCCESS;
  77 }
  78
  79 static int do_dump(struct cmd_tbl *cmdtp, int flag, int argc,
  80                    char *const argv[])
  81 {
  82         struct uc_pmic_priv *priv;
  83         struct udevice *dev;
  84         char fmt[16];
  85         uint reg;
  86         int ret;
  87
  88         if (!currdev) {
  89                 printf("First, set the PMIC device!\n");
  90                 return CMD_RET_USAGE;
  91         }
  92
  93         dev = currdev;
  94         priv = dev_get_uclass_priv(dev);
  95         printf("Dump pmic: %s registers\n", dev->name);
  96
  97         sprintf(fmt, "%%%d.%dx ", priv->trans_len * 2,
  98                 priv->trans_len * 2);
  99
 100         for (reg = 0; reg < pmic_reg_count(dev); reg++) {
 101                 ret = pmic_reg_read(dev, reg);
 102                 if (ret < 0 && ret != -ENODATA) {
 103                         printf("Can't read register: %d\n", reg);
 104                         return failure(ret);
 105                 }
 106
 107                 if (!(reg % 16))
 108                         printf("\n0x%02x: ", reg);
 109
 110                 if (ret == -ENODATA) {
 111                         int i;
 112
 113                         for (i = 0; i < priv->trans_len; i++)
 114                                 puts("--");
 115                         puts(" ");
 116                 } else {
 117                         printf(fmt, ret);
 118                 }
 119         }
 120         printf("\n");
 121
 122         return CMD_RET_SUCCESS;
 123 }
 124
 125 static int do_read(struct cmd_tbl *cmdtp, int flag, int argc,
 126                    char *const argv[])
 127 {
 128         struct uc_pmic_priv *priv;
 129         struct udevice *dev;
 130         int regs, ret;
 131         char fmt[24];
 132         uint reg;
 133
 134         if (!currdev) {
 135                 printf("First, set the PMIC device!\n");
 136                 return CMD_RET_USAGE;
 137         }
 138
 139         dev = currdev;
 140         priv = dev_get_uclass_priv(dev);
 141
 142         if (argc != 2)
 143                 return CMD_RET_USAGE;
 144
 145         reg = simple_strtoul(argv[1], NULL, 0);
 146         regs = pmic_reg_count(dev);
 147         if (reg > regs) {
 148                 printf("PMIC max reg: %d\n", regs);
 149                 return failure(-EFAULT);
 150         }
 151
 152         ret = pmic_reg_read(dev, reg);
 153         if (ret < 0) {
 154                 printf("Can't read PMIC register: %d!\n", reg);
 155                 return failure(ret);
 156         }
 157
 158         sprintf(fmt, "0x%%02x: 0x%%%d.%dx\n", priv->trans_len * 2,
 159                 priv->trans_len * 2);
 160         printf(fmt, reg, ret);
 161
 162         return CMD_RET_SUCCESS;
 163 }
 164
 165 static int do_write(struct cmd_tbl *cmdtp, int flag, int argc,
 166                     char *const argv[])
 167 {
 168         struct udevice *dev;
 169         uint reg, value;
 170         int regs, ret;
 171
 172         if (!currdev) {
 173                 printf("First, set the PMIC device!\n");
 174                 return CMD_RET_USAGE;
 175         }
 176
 177         dev = currdev;
 178
 179         if (argc != 3)
 180                 return CMD_RET_USAGE;
 181
 182         reg = simple_strtoul(argv[1], NULL, 0);
 183         regs = pmic_reg_count(dev);
 184         if (reg > regs) {
 185                 printf("PMIC max reg: %d\n", regs);
 186                 return failure(-EFAULT);
 187         }
 188
 189         value = simple_strtoul(argv[2], NULL, 0);
 190
 191         ret = pmic_reg_write(dev, reg, value);
 192         if (ret) {
 193                 printf("Can't write PMIC register: %d!\n", reg);
 194                 return failure(ret);
 195         }
 196
 197         return CMD_RET_SUCCESS;
 198 }
 199
 200 static struct cmd_tbl subcmd[] = {
 201         U_BOOT_CMD_MKENT(dev, 2, 1, do_dev, "", ""),
 202         U_BOOT_CMD_MKENT(list, 1, 1, do_list, "", ""),
 203         U_BOOT_CMD_MKENT(dump, 1, 1, do_dump, "", ""),
 204         U_BOOT_CMD_MKENT(read, 2, 1, do_read, "", ""),
 205         U_BOOT_CMD_MKENT(write, 3, 1, do_write, "", ""),
 206 };
 207
 208 static int do_pmic(struct cmd_tbl *cmdtp, int flag, int argc,
 209                    char *const argv[])
 210 {
 211         struct cmd_tbl *cmd;
 212
 213         argc--;
 214         argv++;
 215
 216         cmd = find_cmd_tbl(argv[0], subcmd, ARRAY_SIZE(subcmd));
 217         if (cmd == NULL || argc > cmd->maxargs)
 218                 return CMD_RET_USAGE;
 219
 220         return cmd->cmd(cmdtp, flag, argc, argv);
 221 }
 222
 223 U_BOOT_CMD(pmic, CONFIG_SYS_MAXARGS, 1, do_pmic,
 224         "PMIC sub-system",
 225         "list          - list pmic devices\n"
 226         "pmic dev [name]    - show or [set] operating PMIC device\n"
 227         "pmic dump          - dump registers\n"
 228         "pmic read address  - read byte of register at address\n"
 229         "pmic write address - write byte to register at address\n"
 230 );