drivers/power/power_core.c

   1 /*
   2  * Copyright (C) 2011 Samsung Electronics
   3  * Lukasz Majewski <l.majewski@samsung.com>
   4  *
   5  * (C) Copyright 2010
   6  * Stefano Babic, DENX Software Engineering, sbabic@denx.de
   7  *
   8  * (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
   9  *
  10  * SPDX-License-Identifier:     GPL-2.0+
  11  */
  12
  13 #include <common.h>
  14 #include <malloc.h>
  15 #include <linux/types.h>
  16 #include <linux/list.h>
  17 #include <power/pmic.h>
  18
  19 static LIST_HEAD(pmic_list);
  20
  21 int check_reg(struct pmic *p, u32 reg)
  22 {
  23         if (reg >= p->number_of_regs) {
  24                 printf("<reg num> = %d is invalid. Should be less than %d\n",
  25                        reg, p->number_of_regs);
  26                 return -1;
  27         }
  28
  29         return 0;
  30 }
  31
  32 int pmic_set_output(struct pmic *p, u32 reg, int out, int on)
  33 {
  34         u32 val;
  35
  36         if (pmic_reg_read(p, reg, &val))
  37                 return -1;
  38
  39         if (on)
  40                 val |= out;
  41         else
  42                 val &= ~out;
  43
  44         if (pmic_reg_write(p, reg, val))
  45                 return -1;
  46
  47         return 0;
  48 }
  49
  50 static void pmic_show_info(struct pmic *p)
  51 {
  52         printf("PMIC: %s\n", p->name);
  53 }
  54
  55 static int pmic_dump(struct pmic *p)
  56 {
  57         int i, ret;
  58         u32 val;
  59
  60         if (!p) {
  61                 puts("Wrong PMIC name!\n");
  62                 return -1;
  63         }
  64
  65         pmic_show_info(p);
  66         for (i = 0; i < p->number_of_regs; i++) {
  67                 ret = pmic_reg_read(p, i, &val);
  68                 if (ret)
  69                         puts("PMIC: Registers dump failed\n");
  70
  71                 if (!(i % 8))
  72                         printf("\n0x%02x: ", i);
  73
  74                 printf("%08x ", val);
  75         }
  76         puts("\n");
  77         return 0;
  78 }
  79
  80 struct pmic *pmic_alloc(void)
  81 {
  82         struct pmic *p;
  83
  84         p = calloc(sizeof(*p), 1);
  85         if (!p) {
  86                 printf("%s: No available memory for allocation!\n", __func__);
  87                 return NULL;
  88         }
  89
  90         list_add_tail(&p->list, &pmic_list);
  91
  92         debug("%s: new pmic struct: 0x%p\n", __func__, p);
  93
  94         return p;
  95 }
  96
  97 struct pmic *pmic_get(const char *s)
  98 {
  99         struct pmic *p;
 100
 101         list_for_each_entry(p, &pmic_list, list) {
 102                 if (strcmp(p->name, s) == 0) {
 103                         debug("%s: pmic %s -> 0x%p\n", __func__, p->name, p);
 104                         return p;
 105                 }
 106         }
 107
 108         return NULL;
 109 }
 110
 111 const char *power_get_interface(int interface)
 112 {
 113         const char *power_interface[] = {"I2C", "SPI", "|+|-|"};
 114         return power_interface[interface];
 115 }
 116
 117 static void pmic_list_names(void)
 118 {
 119         struct pmic *p;
 120
 121         puts("PMIC devices:\n");
 122         list_for_each_entry(p, &pmic_list, list) {
 123                 printf("name: %s bus: %s_%d\n", p->name,
 124                        power_get_interface(p->interface), p->bus);
 125         }
 126 }
 127
 128 int do_pmic(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 129 {
 130         u32 ret, reg, val;
 131         char *cmd, *name;
 132         struct pmic *p;
 133
 134         /* at least two arguments please */
 135         if (argc < 2)
 136                 return CMD_RET_USAGE;
 137
 138         if (strcmp(argv[1], "list") == 0) {
 139                 pmic_list_names();
 140                 return CMD_RET_SUCCESS;
 141         }
 142
 143         if (argc < 3)
 144                 return CMD_RET_USAGE;
 145
 146         name = argv[1];
 147         cmd = argv[2];
 148
 149         debug("%s: name: %s cmd: %s\n", __func__, name, cmd);
 150         p = pmic_get(name);
 151         if (!p)
 152                 return CMD_RET_FAILURE;
 153
 154         if (strcmp(cmd, "dump") == 0) {
 155                 if (pmic_dump(p))
 156                         return CMD_RET_FAILURE;
 157                 return CMD_RET_SUCCESS;
 158         }
 159
 160         if (strcmp(cmd, "read") == 0) {
 161                 if (argc < 4)
 162                         return CMD_RET_USAGE;
 163
 164                 reg = simple_strtoul(argv[3], NULL, 16);
 165                 ret = pmic_reg_read(p, reg, &val);
 166
 167                 if (ret)
 168                         puts("PMIC: Register read failed\n");
 169
 170                 printf("\n0x%02x: 0x%08x\n", reg, val);
 171
 172                 return CMD_RET_SUCCESS;
 173         }
 174
 175         if (strcmp(cmd, "write") == 0) {
 176                 if (argc < 5)
 177                         return CMD_RET_USAGE;
 178
 179                 reg = simple_strtoul(argv[3], NULL, 16);
 180                 val = simple_strtoul(argv[4], NULL, 16);
 181                 pmic_reg_write(p, reg, val);
 182
 183                 return CMD_RET_SUCCESS;
 184         }
 185
 186         if (strcmp(cmd, "bat") == 0) {
 187                 if (argc < 4)
 188                         return CMD_RET_USAGE;
 189
 190                 if (!p->pbat) {
 191                         printf("%s is not a battery\n", p->name);
 192                         return CMD_RET_FAILURE;
 193                 }
 194
 195                 if (strcmp(argv[3], "state") == 0)
 196                         p->fg->fg_battery_check(p->pbat->fg, p);
 197
 198                 if (strcmp(argv[3], "charge") == 0) {
 199                         printf("BAT: %s charging (ctrl+c to break)\n",
 200                                p->name);
 201                         if (p->low_power_mode)
 202                                 p->low_power_mode();
 203                         if (p->pbat->battery_charge)
 204                                 p->pbat->battery_charge(p);
 205                 }
 206
 207                 return CMD_RET_SUCCESS;
 208         }
 209
 210         /* No subcommand found */
 211         return CMD_RET_SUCCESS;
 212 }
 213
 214 U_BOOT_CMD(
 215         pmic,   CONFIG_SYS_MAXARGS, 1, do_pmic,
 216         "PMIC",
 217         "list - list available PMICs\n"
 218         "pmic name dump - dump named PMIC registers\n"
 219         "pmic name read <reg> - read register\n"
 220         "pmic name write <reg> <value> - write register\n"
 221         "pmic name bat state - write register\n"
 222         "pmic name bat charge - write register\n"
 223 );