cmd/pmic.c

   1 /*
   2  * Copyright (C) 2014-2015 Samsung Electronics
   3  * Przemyslaw Marczak <p.marczak@samsung.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7 #include <common.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(cmd_tbl_t *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", currdev->seq, currdev->name);
  45         }
  46
  47         return CMD_RET_SUCCESS;
  48 }
  49
  50 static int do_list(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  51 {
  52         struct udevice *dev;
  53         int ret;
  54
  55         printf("| %-*.*s| %-*.*s| %s @ %s\n",
  56                LIMIT_DEV, LIMIT_DEV, "Name",
  57                LIMIT_PARENT, LIMIT_PARENT, "Parent name",
  58                "Parent uclass", "seq");
  59
  60         for (ret = uclass_first_device(UCLASS_PMIC, &dev); dev;
  61              ret = uclass_next_device(&dev)) {
  62                 if (ret)
  63                         continue;
  64
  65                 printf("| %-*.*s| %-*.*s| %s @ %d\n",
  66                        LIMIT_DEV, LIMIT_DEV, dev->name,
  67                        LIMIT_PARENT, LIMIT_PARENT, dev->parent->name,
  68                        dev_get_uclass_name(dev->parent), dev->parent->seq);
  69         }
  70
  71         if (ret)
  72                 return CMD_RET_FAILURE;
  73
  74         return CMD_RET_SUCCESS;
  75 }
  76
  77 static int do_dump(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  78 {
  79         struct udevice *dev;
  80         uint8_t value;
  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
  91         printf("Dump pmic: %s registers\n", dev->name);
  92
  93         for (reg = 0; reg < pmic_reg_count(dev); reg++) {
  94                 ret = pmic_read(dev, reg, &value, 1);
  95                 if (ret) {
  96                         printf("Can't read register: %d\n", reg);
  97                         return failure(ret);
  98                 }
  99
 100                 if (!(reg % 16))
 101                         printf("\n0x%02x: ", reg);
 102
 103                 printf("%2.2x ", value);
 104         }
 105         printf("\n");
 106
 107         return CMD_RET_SUCCESS;
 108 }
 109
 110 static int do_read(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 111 {
 112         struct udevice *dev;
 113         int regs, ret;
 114         uint8_t value;
 115         uint reg;
 116
 117         if (!currdev) {
 118                 printf("First, set the PMIC device!\n");
 119                 return CMD_RET_USAGE;
 120         }
 121
 122         dev = currdev;
 123
 124         if (argc != 2)
 125                 return CMD_RET_USAGE;
 126
 127         reg = simple_strtoul(argv[1], NULL, 0);
 128         regs = pmic_reg_count(dev);
 129         if (reg > regs) {
 130                 printf("PMIC max reg: %d\n", regs);
 131                 return failure(-EFAULT);
 132         }
 133
 134         ret = pmic_read(dev, reg, &value, 1);
 135         if (ret) {
 136                 printf("Can't read PMIC register: %d!\n", reg);
 137                 return failure(ret);
 138         }
 139
 140         printf("0x%02x: 0x%2.2x\n", reg, value);
 141
 142         return CMD_RET_SUCCESS;
 143 }
 144
 145 static int do_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 146 {
 147         struct udevice *dev;
 148         int regs, ret;
 149         uint8_t value;
 150         uint reg;
 151
 152         if (!currdev) {
 153                 printf("First, set the PMIC device!\n");
 154                 return CMD_RET_USAGE;
 155         }
 156
 157         dev = currdev;
 158
 159         if (argc != 3)
 160                 return CMD_RET_USAGE;
 161
 162         reg = simple_strtoul(argv[1], NULL, 0);
 163         regs = pmic_reg_count(dev);
 164         if (reg > regs) {
 165                 printf("PMIC max reg: %d\n", regs);
 166                 return failure(-EFAULT);
 167         }
 168
 169         value = simple_strtoul(argv[2], NULL, 0);
 170
 171         ret = pmic_write(dev, reg, &value, 1);
 172         if (ret) {
 173                 printf("Can't write PMIC register: %d!\n", reg);
 174                 return failure(ret);
 175         }
 176
 177         return CMD_RET_SUCCESS;
 178 }
 179
 180 static cmd_tbl_t subcmd[] = {
 181         U_BOOT_CMD_MKENT(dev, 2, 1, do_dev, "", ""),
 182         U_BOOT_CMD_MKENT(list, 1, 1, do_list, "", ""),
 183         U_BOOT_CMD_MKENT(dump, 1, 1, do_dump, "", ""),
 184         U_BOOT_CMD_MKENT(read, 2, 1, do_read, "", ""),
 185         U_BOOT_CMD_MKENT(write, 3, 1, do_write, "", ""),
 186 };
 187
 188 static int do_pmic(cmd_tbl_t *cmdtp, int flag, int argc,
 189                         char * const argv[])
 190 {
 191         cmd_tbl_t *cmd;
 192
 193         argc--;
 194         argv++;
 195
 196         cmd = find_cmd_tbl(argv[0], subcmd, ARRAY_SIZE(subcmd));
 197         if (cmd == NULL || argc > cmd->maxargs)
 198                 return CMD_RET_USAGE;
 199
 200         return cmd->cmd(cmdtp, flag, argc, argv);
 201 }
 202
 203 U_BOOT_CMD(pmic, CONFIG_SYS_MAXARGS, 1, do_pmic,
 204         "PMIC sub-system",
 205         "list          - list pmic devices\n"
 206         "pmic dev [name]    - show or [set] operating PMIC device\n"
 207         "pmic dump          - dump registers\n"
 208         "pmic read address  - read byte of register at address\n"
 209         "pmic write address - write byte to register at address\n"
 210 );