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