Przemyslaw Marczak | d89fdcf | 2015-04-20 20:07:43 +0200 | [diff] [blame^] | 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_SEQ 3 |
| 14 | #define LIMIT_DEVNAME 20 |
| 15 | |
| 16 | static struct udevice *currdev; |
| 17 | |
| 18 | static int failed(const char *getset, const char *thing, |
| 19 | const char *for_dev, int ret) |
| 20 | { |
| 21 | printf("Can't %s %s %s.\nError: %d (%s)\n", getset, thing, for_dev, |
| 22 | ret, errno_str(ret)); |
| 23 | return CMD_RET_FAILURE; |
| 24 | } |
| 25 | |
| 26 | static int pmic_dev_get(bool list_only, int get_seq, struct udevice **devp) |
| 27 | { |
| 28 | struct udevice *dev; |
| 29 | int ret; |
| 30 | |
| 31 | if (devp) |
| 32 | *devp = NULL; |
| 33 | |
| 34 | for (ret = uclass_first_device(UCLASS_PMIC, &dev); dev; |
| 35 | ret = uclass_next_device(&dev)) { |
| 36 | if (list_only) { |
| 37 | printf("|%*d | %-*.*s| %-*.*s| %s @ %d\n", |
| 38 | LIMIT_SEQ, dev->seq, |
| 39 | LIMIT_DEVNAME, LIMIT_DEVNAME, dev->name, |
| 40 | LIMIT_DEVNAME, LIMIT_DEVNAME, dev->parent->name, |
| 41 | dev_get_uclass_name(dev->parent), |
| 42 | dev->parent->seq); |
| 43 | continue; |
| 44 | } |
| 45 | |
| 46 | if (dev->seq == get_seq) { |
| 47 | if (devp) |
| 48 | *devp = dev; |
| 49 | else |
| 50 | return -EINVAL; |
| 51 | |
| 52 | return 0; |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | if (list_only) |
| 57 | return ret; |
| 58 | |
| 59 | return -ENODEV; |
| 60 | } |
| 61 | |
| 62 | static int do_dev(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
| 63 | { |
| 64 | int seq, ret = -ENODEV; |
| 65 | |
| 66 | switch (argc) { |
| 67 | case 2: |
| 68 | seq = simple_strtoul(argv[1], NULL, 0); |
| 69 | ret = uclass_get_device_by_seq(UCLASS_PMIC, seq, &currdev); |
| 70 | if (ret && (ret = pmic_dev_get(false, seq, &currdev))) |
| 71 | goto failed; |
| 72 | case 1: |
| 73 | if (!currdev) |
| 74 | goto failed; |
| 75 | |
| 76 | printf("dev: %d @ %s\n", currdev->seq, currdev->name); |
| 77 | } |
| 78 | |
| 79 | return CMD_RET_SUCCESS; |
| 80 | failed: |
| 81 | return failed("get", "the", "device", ret); |
| 82 | } |
| 83 | |
| 84 | static int do_list(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
| 85 | { |
| 86 | struct udevice *dev; |
| 87 | int ret; |
| 88 | |
| 89 | printf("|%*s | %-*.*s| %-*.*s| %s @ %s\n", |
| 90 | LIMIT_SEQ, "Seq", |
| 91 | LIMIT_DEVNAME, LIMIT_DEVNAME, "Name", |
| 92 | LIMIT_DEVNAME, LIMIT_DEVNAME, "Parent name", |
| 93 | "Parent uclass", "seq"); |
| 94 | |
| 95 | for (ret = uclass_first_device(UCLASS_PMIC, &dev); dev; |
| 96 | ret = uclass_next_device(&dev)) { |
| 97 | printf("|%*d | %-*.*s| %-*.*s| %s @ %d\n", |
| 98 | LIMIT_SEQ, dev->seq, |
| 99 | LIMIT_DEVNAME, LIMIT_DEVNAME, dev->name, |
| 100 | LIMIT_DEVNAME, LIMIT_DEVNAME, dev->parent->name, |
| 101 | dev_get_uclass_name(dev->parent), dev->parent->seq); |
| 102 | } |
| 103 | |
| 104 | if (ret) |
| 105 | return CMD_RET_FAILURE; |
| 106 | |
| 107 | return CMD_RET_SUCCESS; |
| 108 | } |
| 109 | |
| 110 | static int do_dump(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
| 111 | { |
| 112 | struct udevice *dev; |
| 113 | uint8_t value; |
| 114 | uint reg; |
| 115 | int ret; |
| 116 | |
| 117 | if (!currdev) |
| 118 | return failed("get", "current", "device", -ENODEV); |
| 119 | |
| 120 | dev = currdev; |
| 121 | |
| 122 | printf("Dump pmic: %s registers\n", dev->name); |
| 123 | |
| 124 | for (reg = 0; reg < pmic_reg_count(dev); reg++) { |
| 125 | ret = pmic_read(dev, reg, &value, 1); |
| 126 | if (ret) |
| 127 | return failed("read", dev->name, "register", ret); |
| 128 | |
| 129 | if (!(reg % 16)) |
| 130 | printf("\n0x%02x: ", reg); |
| 131 | |
| 132 | printf("%2.2x ", value); |
| 133 | } |
| 134 | printf("\n"); |
| 135 | |
| 136 | return CMD_RET_SUCCESS; |
| 137 | } |
| 138 | |
| 139 | static int do_read(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
| 140 | { |
| 141 | struct udevice *dev; |
| 142 | int regs, ret; |
| 143 | uint8_t value; |
| 144 | uint reg; |
| 145 | |
| 146 | if (!currdev) |
| 147 | return failed("get", "current", "device", -ENODEV); |
| 148 | |
| 149 | dev = currdev; |
| 150 | |
| 151 | if (argc != 2) |
| 152 | return CMD_RET_USAGE; |
| 153 | |
| 154 | reg = simple_strtoul(argv[1], NULL, 0); |
| 155 | regs = pmic_reg_count(dev); |
| 156 | if (reg > regs) { |
| 157 | printf("Pmic max reg: %d\n", regs); |
| 158 | return failed("read", "given", "address", -EFAULT); |
| 159 | } |
| 160 | |
| 161 | ret = pmic_read(dev, reg, &value, 1); |
| 162 | if (ret) |
| 163 | return failed("read", dev->name, "register", ret); |
| 164 | |
| 165 | printf("0x%02x: 0x%2.2x\n", reg, value); |
| 166 | |
| 167 | return CMD_RET_SUCCESS; |
| 168 | } |
| 169 | |
| 170 | static int do_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
| 171 | { |
| 172 | struct udevice *dev; |
| 173 | int regs, ret; |
| 174 | uint8_t value; |
| 175 | uint reg; |
| 176 | |
| 177 | if (!currdev) |
| 178 | return failed("get", "current", "device", -ENODEV); |
| 179 | |
| 180 | dev = currdev; |
| 181 | |
| 182 | if (argc != 3) |
| 183 | return CMD_RET_USAGE; |
| 184 | |
| 185 | reg = simple_strtoul(argv[1], NULL, 0); |
| 186 | regs = pmic_reg_count(dev); |
| 187 | if (reg > regs) { |
| 188 | printf("Pmic max reg: %d\n", regs); |
| 189 | return failed("write", "given", "address", -EFAULT); |
| 190 | } |
| 191 | |
| 192 | value = simple_strtoul(argv[2], NULL, 0); |
| 193 | |
| 194 | ret = pmic_write(dev, reg, &value, 1); |
| 195 | if (ret) |
| 196 | return failed("write", dev->name, "register", ret); |
| 197 | |
| 198 | return CMD_RET_SUCCESS; |
| 199 | } |
| 200 | |
| 201 | static cmd_tbl_t subcmd[] = { |
| 202 | U_BOOT_CMD_MKENT(dev, 2, 1, do_dev, "", ""), |
| 203 | U_BOOT_CMD_MKENT(list, 1, 1, do_list, "", ""), |
| 204 | U_BOOT_CMD_MKENT(dump, 1, 1, do_dump, "", ""), |
| 205 | U_BOOT_CMD_MKENT(read, 2, 1, do_read, "", ""), |
| 206 | U_BOOT_CMD_MKENT(write, 3, 1, do_write, "", ""), |
| 207 | }; |
| 208 | |
| 209 | static int do_pmic(cmd_tbl_t *cmdtp, int flag, int argc, |
| 210 | char * const argv[]) |
| 211 | { |
| 212 | cmd_tbl_t *cmd; |
| 213 | |
| 214 | argc--; |
| 215 | argv++; |
| 216 | |
| 217 | cmd = find_cmd_tbl(argv[0], subcmd, ARRAY_SIZE(subcmd)); |
| 218 | if (cmd == NULL || argc > cmd->maxargs) |
| 219 | return CMD_RET_USAGE; |
| 220 | |
| 221 | return cmd->cmd(cmdtp, flag, argc, argv); |
| 222 | } |
| 223 | |
| 224 | U_BOOT_CMD(pmic, CONFIG_SYS_MAXARGS, 1, do_pmic, |
| 225 | " operations", |
| 226 | "list - list pmic devices\n" |
| 227 | "pmic dev [id] - show or [set] operating pmic device\n" |
| 228 | "pmic dump - dump registers\n" |
| 229 | "pmic read address - read byte of register at address\n" |
| 230 | "pmic write address - write byte to register at address\n" |
| 231 | ); |