Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Hardware monitoring driver for PMBus devices |
| 3 | * |
| 4 | * Copyright (c) 2010, 2011 Ericsson AB. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 19 | */ |
| 20 | |
| 21 | #include <linux/kernel.h> |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/init.h> |
| 24 | #include <linux/err.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/i2c.h> |
| 27 | #include <linux/hwmon.h> |
| 28 | #include <linux/hwmon-sysfs.h> |
| 29 | #include <linux/delay.h> |
| 30 | #include <linux/i2c/pmbus.h> |
| 31 | #include "pmbus.h" |
| 32 | |
| 33 | /* |
| 34 | * Constants needed to determine number of sensors, booleans, and labels. |
| 35 | */ |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 36 | #define PMBUS_MAX_INPUT_SENSORS 22 /* 10*volt, 7*curr, 5*power */ |
| 37 | #define PMBUS_VOUT_SENSORS_PER_PAGE 9 /* input, min, max, lcrit, |
| 38 | crit, lowest, highest, avg, |
| 39 | reset */ |
| 40 | #define PMBUS_IOUT_SENSORS_PER_PAGE 8 /* input, min, max, crit, |
| 41 | lowest, highest, avg, |
| 42 | reset */ |
Guenter Roeck | 60b873e | 2012-02-23 19:33:55 -0800 | [diff] [blame] | 43 | #define PMBUS_POUT_SENSORS_PER_PAGE 7 /* input, cap, max, crit, |
| 44 | * highest, avg, reset |
| 45 | */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 46 | #define PMBUS_MAX_SENSORS_PER_FAN 1 /* input */ |
Guenter Roeck | 60b873e | 2012-02-23 19:33:55 -0800 | [diff] [blame] | 47 | #define PMBUS_MAX_SENSORS_PER_TEMP 9 /* input, min, max, lcrit, |
| 48 | * crit, lowest, highest, avg, |
| 49 | * reset |
| 50 | */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 51 | |
| 52 | #define PMBUS_MAX_INPUT_BOOLEANS 7 /* v: min_alarm, max_alarm, |
| 53 | lcrit_alarm, crit_alarm; |
| 54 | c: alarm, crit_alarm; |
| 55 | p: crit_alarm */ |
| 56 | #define PMBUS_VOUT_BOOLEANS_PER_PAGE 4 /* min_alarm, max_alarm, |
| 57 | lcrit_alarm, crit_alarm */ |
| 58 | #define PMBUS_IOUT_BOOLEANS_PER_PAGE 3 /* alarm, lcrit_alarm, |
| 59 | crit_alarm */ |
Guenter Roeck | 7cb3c44 | 2012-03-04 08:10:57 -0800 | [diff] [blame] | 60 | #define PMBUS_POUT_BOOLEANS_PER_PAGE 3 /* cap_alarm, alarm, crit_alarm |
| 61 | */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 62 | #define PMBUS_MAX_BOOLEANS_PER_FAN 2 /* alarm, fault */ |
| 63 | #define PMBUS_MAX_BOOLEANS_PER_TEMP 4 /* min_alarm, max_alarm, |
| 64 | lcrit_alarm, crit_alarm */ |
| 65 | |
| 66 | #define PMBUS_MAX_INPUT_LABELS 4 /* vin, vcap, iin, pin */ |
| 67 | |
| 68 | /* |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 69 | * status, status_vout, status_iout, status_fans, status_fan34, and status_temp |
| 70 | * are paged. status_input is unpaged. |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 71 | */ |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 72 | #define PB_NUM_STATUS_REG (PMBUS_PAGES * 6 + 1) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 73 | |
| 74 | /* |
| 75 | * Index into status register array, per status register group |
| 76 | */ |
| 77 | #define PB_STATUS_BASE 0 |
| 78 | #define PB_STATUS_VOUT_BASE (PB_STATUS_BASE + PMBUS_PAGES) |
| 79 | #define PB_STATUS_IOUT_BASE (PB_STATUS_VOUT_BASE + PMBUS_PAGES) |
| 80 | #define PB_STATUS_FAN_BASE (PB_STATUS_IOUT_BASE + PMBUS_PAGES) |
| 81 | #define PB_STATUS_FAN34_BASE (PB_STATUS_FAN_BASE + PMBUS_PAGES) |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 82 | #define PB_STATUS_INPUT_BASE (PB_STATUS_FAN34_BASE + PMBUS_PAGES) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 83 | #define PB_STATUS_TEMP_BASE (PB_STATUS_INPUT_BASE + 1) |
| 84 | |
Guenter Roeck | 2bd05bf | 2011-07-09 08:58:49 -0700 | [diff] [blame] | 85 | #define PMBUS_NAME_SIZE 24 |
| 86 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 87 | struct pmbus_sensor { |
Guenter Roeck | 2bd05bf | 2011-07-09 08:58:49 -0700 | [diff] [blame] | 88 | char name[PMBUS_NAME_SIZE]; /* sysfs sensor name */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 89 | struct sensor_device_attribute attribute; |
| 90 | u8 page; /* page number */ |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 91 | u16 reg; /* register */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 92 | enum pmbus_sensor_classes class; /* sensor class */ |
| 93 | bool update; /* runtime sensor update needed */ |
| 94 | int data; /* Sensor data. |
| 95 | Negative if there was a read error */ |
| 96 | }; |
| 97 | |
| 98 | struct pmbus_boolean { |
Guenter Roeck | 2bd05bf | 2011-07-09 08:58:49 -0700 | [diff] [blame] | 99 | char name[PMBUS_NAME_SIZE]; /* sysfs boolean name */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 100 | struct sensor_device_attribute attribute; |
| 101 | }; |
| 102 | |
| 103 | struct pmbus_label { |
Guenter Roeck | 2bd05bf | 2011-07-09 08:58:49 -0700 | [diff] [blame] | 104 | char name[PMBUS_NAME_SIZE]; /* sysfs label name */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 105 | struct sensor_device_attribute attribute; |
Guenter Roeck | 2bd05bf | 2011-07-09 08:58:49 -0700 | [diff] [blame] | 106 | char label[PMBUS_NAME_SIZE]; /* label */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 107 | }; |
| 108 | |
| 109 | struct pmbus_data { |
| 110 | struct device *hwmon_dev; |
| 111 | |
| 112 | u32 flags; /* from platform data */ |
| 113 | |
| 114 | int exponent; /* linear mode: exponent for output voltages */ |
| 115 | |
| 116 | const struct pmbus_driver_info *info; |
| 117 | |
| 118 | int max_attributes; |
| 119 | int num_attributes; |
| 120 | struct attribute **attributes; |
| 121 | struct attribute_group group; |
| 122 | |
| 123 | /* |
| 124 | * Sensors cover both sensor and limit registers. |
| 125 | */ |
| 126 | int max_sensors; |
| 127 | int num_sensors; |
| 128 | struct pmbus_sensor *sensors; |
| 129 | /* |
| 130 | * Booleans are used for alarms. |
| 131 | * Values are determined from status registers. |
| 132 | */ |
| 133 | int max_booleans; |
| 134 | int num_booleans; |
| 135 | struct pmbus_boolean *booleans; |
| 136 | /* |
| 137 | * Labels are used to map generic names (e.g., "in1") |
| 138 | * to PMBus specific names (e.g., "vin" or "vout1"). |
| 139 | */ |
| 140 | int max_labels; |
| 141 | int num_labels; |
| 142 | struct pmbus_label *labels; |
| 143 | |
| 144 | struct mutex update_lock; |
| 145 | bool valid; |
| 146 | unsigned long last_updated; /* in jiffies */ |
| 147 | |
| 148 | /* |
| 149 | * A single status register covers multiple attributes, |
| 150 | * so we keep them all together. |
| 151 | */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 152 | u8 status[PB_NUM_STATUS_REG]; |
| 153 | |
| 154 | u8 currpage; |
| 155 | }; |
| 156 | |
| 157 | int pmbus_set_page(struct i2c_client *client, u8 page) |
| 158 | { |
| 159 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 160 | int rv = 0; |
| 161 | int newpage; |
| 162 | |
| 163 | if (page != data->currpage) { |
| 164 | rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page); |
| 165 | newpage = i2c_smbus_read_byte_data(client, PMBUS_PAGE); |
| 166 | if (newpage != page) |
Guenter Roeck | 179144a | 2011-09-01 08:34:31 -0700 | [diff] [blame] | 167 | rv = -EIO; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 168 | else |
| 169 | data->currpage = page; |
| 170 | } |
| 171 | return rv; |
| 172 | } |
| 173 | EXPORT_SYMBOL_GPL(pmbus_set_page); |
| 174 | |
Guenter Roeck | 03e9bd8 | 2011-07-08 10:43:57 -0700 | [diff] [blame] | 175 | int pmbus_write_byte(struct i2c_client *client, int page, u8 value) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 176 | { |
| 177 | int rv; |
| 178 | |
Guenter Roeck | 9c1ed89 | 2011-07-09 07:41:01 -0700 | [diff] [blame] | 179 | if (page >= 0) { |
| 180 | rv = pmbus_set_page(client, page); |
| 181 | if (rv < 0) |
| 182 | return rv; |
| 183 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 184 | |
| 185 | return i2c_smbus_write_byte(client, value); |
| 186 | } |
Guenter Roeck | 03e9bd8 | 2011-07-08 10:43:57 -0700 | [diff] [blame] | 187 | EXPORT_SYMBOL_GPL(pmbus_write_byte); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 188 | |
Guenter Roeck | 044cd3a | 2011-07-29 22:08:07 -0700 | [diff] [blame] | 189 | /* |
| 190 | * _pmbus_write_byte() is similar to pmbus_write_byte(), but checks if |
| 191 | * a device specific mapping funcion exists and calls it if necessary. |
| 192 | */ |
| 193 | static int _pmbus_write_byte(struct i2c_client *client, int page, u8 value) |
| 194 | { |
| 195 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 196 | const struct pmbus_driver_info *info = data->info; |
| 197 | int status; |
| 198 | |
| 199 | if (info->write_byte) { |
| 200 | status = info->write_byte(client, page, value); |
| 201 | if (status != -ENODATA) |
| 202 | return status; |
| 203 | } |
| 204 | return pmbus_write_byte(client, page, value); |
| 205 | } |
| 206 | |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 207 | int pmbus_write_word_data(struct i2c_client *client, u8 page, u8 reg, u16 word) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 208 | { |
| 209 | int rv; |
| 210 | |
| 211 | rv = pmbus_set_page(client, page); |
| 212 | if (rv < 0) |
| 213 | return rv; |
| 214 | |
| 215 | return i2c_smbus_write_word_data(client, reg, word); |
| 216 | } |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 217 | EXPORT_SYMBOL_GPL(pmbus_write_word_data); |
| 218 | |
| 219 | /* |
| 220 | * _pmbus_write_word_data() is similar to pmbus_write_word_data(), but checks if |
| 221 | * a device specific mapping function exists and calls it if necessary. |
| 222 | */ |
| 223 | static int _pmbus_write_word_data(struct i2c_client *client, int page, int reg, |
| 224 | u16 word) |
| 225 | { |
| 226 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 227 | const struct pmbus_driver_info *info = data->info; |
| 228 | int status; |
| 229 | |
| 230 | if (info->write_word_data) { |
| 231 | status = info->write_word_data(client, page, reg, word); |
| 232 | if (status != -ENODATA) |
| 233 | return status; |
| 234 | } |
| 235 | if (reg >= PMBUS_VIRT_BASE) |
Guenter Roeck | 179144a | 2011-09-01 08:34:31 -0700 | [diff] [blame] | 236 | return -ENXIO; |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 237 | return pmbus_write_word_data(client, page, reg, word); |
| 238 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 239 | |
| 240 | int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg) |
| 241 | { |
| 242 | int rv; |
| 243 | |
| 244 | rv = pmbus_set_page(client, page); |
| 245 | if (rv < 0) |
| 246 | return rv; |
| 247 | |
| 248 | return i2c_smbus_read_word_data(client, reg); |
| 249 | } |
| 250 | EXPORT_SYMBOL_GPL(pmbus_read_word_data); |
| 251 | |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 252 | /* |
| 253 | * _pmbus_read_word_data() is similar to pmbus_read_word_data(), but checks if |
| 254 | * a device specific mapping function exists and calls it if necessary. |
| 255 | */ |
| 256 | static int _pmbus_read_word_data(struct i2c_client *client, int page, int reg) |
| 257 | { |
| 258 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 259 | const struct pmbus_driver_info *info = data->info; |
| 260 | int status; |
| 261 | |
| 262 | if (info->read_word_data) { |
| 263 | status = info->read_word_data(client, page, reg); |
| 264 | if (status != -ENODATA) |
| 265 | return status; |
| 266 | } |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 267 | if (reg >= PMBUS_VIRT_BASE) |
Guenter Roeck | 179144a | 2011-09-01 08:34:31 -0700 | [diff] [blame] | 268 | return -ENXIO; |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 269 | return pmbus_read_word_data(client, page, reg); |
| 270 | } |
| 271 | |
Guenter Roeck | 9c1ed89 | 2011-07-09 07:41:01 -0700 | [diff] [blame] | 272 | int pmbus_read_byte_data(struct i2c_client *client, int page, u8 reg) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 273 | { |
| 274 | int rv; |
| 275 | |
Guenter Roeck | 9c1ed89 | 2011-07-09 07:41:01 -0700 | [diff] [blame] | 276 | if (page >= 0) { |
| 277 | rv = pmbus_set_page(client, page); |
| 278 | if (rv < 0) |
| 279 | return rv; |
| 280 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 281 | |
| 282 | return i2c_smbus_read_byte_data(client, reg); |
| 283 | } |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 284 | EXPORT_SYMBOL_GPL(pmbus_read_byte_data); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 285 | |
Guenter Roeck | c6bfb76 | 2011-07-09 12:06:45 -0700 | [diff] [blame] | 286 | /* |
| 287 | * _pmbus_read_byte_data() is similar to pmbus_read_byte_data(), but checks if |
| 288 | * a device specific mapping function exists and calls it if necessary. |
| 289 | */ |
| 290 | static int _pmbus_read_byte_data(struct i2c_client *client, int page, int reg) |
| 291 | { |
| 292 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 293 | const struct pmbus_driver_info *info = data->info; |
| 294 | int status; |
| 295 | |
| 296 | if (info->read_byte_data) { |
| 297 | status = info->read_byte_data(client, page, reg); |
| 298 | if (status != -ENODATA) |
| 299 | return status; |
| 300 | } |
| 301 | return pmbus_read_byte_data(client, page, reg); |
| 302 | } |
| 303 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 304 | static void pmbus_clear_fault_page(struct i2c_client *client, int page) |
| 305 | { |
Guenter Roeck | 044cd3a | 2011-07-29 22:08:07 -0700 | [diff] [blame] | 306 | _pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 307 | } |
| 308 | |
| 309 | void pmbus_clear_faults(struct i2c_client *client) |
| 310 | { |
| 311 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 312 | int i; |
| 313 | |
| 314 | for (i = 0; i < data->info->pages; i++) |
| 315 | pmbus_clear_fault_page(client, i); |
| 316 | } |
| 317 | EXPORT_SYMBOL_GPL(pmbus_clear_faults); |
| 318 | |
Guenter Roeck | 9c1ed89 | 2011-07-09 07:41:01 -0700 | [diff] [blame] | 319 | static int pmbus_check_status_cml(struct i2c_client *client) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 320 | { |
| 321 | int status, status2; |
| 322 | |
Guenter Roeck | da8e48a | 2011-07-29 22:19:39 -0700 | [diff] [blame] | 323 | status = _pmbus_read_byte_data(client, -1, PMBUS_STATUS_BYTE); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 324 | if (status < 0 || (status & PB_STATUS_CML)) { |
Guenter Roeck | da8e48a | 2011-07-29 22:19:39 -0700 | [diff] [blame] | 325 | status2 = _pmbus_read_byte_data(client, -1, PMBUS_STATUS_CML); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 326 | if (status2 < 0 || (status2 & PB_CML_FAULT_INVALID_COMMAND)) |
Guenter Roeck | 179144a | 2011-09-01 08:34:31 -0700 | [diff] [blame] | 327 | return -EIO; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 328 | } |
| 329 | return 0; |
| 330 | } |
| 331 | |
| 332 | bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg) |
| 333 | { |
| 334 | int rv; |
| 335 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 336 | |
Guenter Roeck | c6bfb76 | 2011-07-09 12:06:45 -0700 | [diff] [blame] | 337 | rv = _pmbus_read_byte_data(client, page, reg); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 338 | if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK)) |
Guenter Roeck | 9c1ed89 | 2011-07-09 07:41:01 -0700 | [diff] [blame] | 339 | rv = pmbus_check_status_cml(client); |
| 340 | pmbus_clear_fault_page(client, -1); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 341 | return rv >= 0; |
| 342 | } |
| 343 | EXPORT_SYMBOL_GPL(pmbus_check_byte_register); |
| 344 | |
| 345 | bool pmbus_check_word_register(struct i2c_client *client, int page, int reg) |
| 346 | { |
| 347 | int rv; |
| 348 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 349 | |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 350 | rv = _pmbus_read_word_data(client, page, reg); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 351 | if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK)) |
Guenter Roeck | 9c1ed89 | 2011-07-09 07:41:01 -0700 | [diff] [blame] | 352 | rv = pmbus_check_status_cml(client); |
| 353 | pmbus_clear_fault_page(client, -1); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 354 | return rv >= 0; |
| 355 | } |
| 356 | EXPORT_SYMBOL_GPL(pmbus_check_word_register); |
| 357 | |
| 358 | const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client *client) |
| 359 | { |
| 360 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 361 | |
| 362 | return data->info; |
| 363 | } |
| 364 | EXPORT_SYMBOL_GPL(pmbus_get_driver_info); |
| 365 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 366 | static struct pmbus_data *pmbus_update_device(struct device *dev) |
| 367 | { |
| 368 | struct i2c_client *client = to_i2c_client(dev); |
| 369 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 370 | const struct pmbus_driver_info *info = data->info; |
| 371 | |
| 372 | mutex_lock(&data->update_lock); |
| 373 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { |
| 374 | int i; |
| 375 | |
| 376 | for (i = 0; i < info->pages; i++) |
| 377 | data->status[PB_STATUS_BASE + i] |
Guenter Roeck | da8e48a | 2011-07-29 22:19:39 -0700 | [diff] [blame] | 378 | = _pmbus_read_byte_data(client, i, |
| 379 | PMBUS_STATUS_BYTE); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 380 | for (i = 0; i < info->pages; i++) { |
| 381 | if (!(info->func[i] & PMBUS_HAVE_STATUS_VOUT)) |
| 382 | continue; |
| 383 | data->status[PB_STATUS_VOUT_BASE + i] |
Guenter Roeck | 2cfa6ae | 2011-03-08 23:00:10 -0800 | [diff] [blame] | 384 | = _pmbus_read_byte_data(client, i, PMBUS_STATUS_VOUT); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 385 | } |
| 386 | for (i = 0; i < info->pages; i++) { |
| 387 | if (!(info->func[i] & PMBUS_HAVE_STATUS_IOUT)) |
| 388 | continue; |
| 389 | data->status[PB_STATUS_IOUT_BASE + i] |
Guenter Roeck | 2cfa6ae | 2011-03-08 23:00:10 -0800 | [diff] [blame] | 390 | = _pmbus_read_byte_data(client, i, PMBUS_STATUS_IOUT); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 391 | } |
| 392 | for (i = 0; i < info->pages; i++) { |
| 393 | if (!(info->func[i] & PMBUS_HAVE_STATUS_TEMP)) |
| 394 | continue; |
| 395 | data->status[PB_STATUS_TEMP_BASE + i] |
Guenter Roeck | 2cfa6ae | 2011-03-08 23:00:10 -0800 | [diff] [blame] | 396 | = _pmbus_read_byte_data(client, i, |
| 397 | PMBUS_STATUS_TEMPERATURE); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 398 | } |
| 399 | for (i = 0; i < info->pages; i++) { |
| 400 | if (!(info->func[i] & PMBUS_HAVE_STATUS_FAN12)) |
| 401 | continue; |
| 402 | data->status[PB_STATUS_FAN_BASE + i] |
Guenter Roeck | 2cfa6ae | 2011-03-08 23:00:10 -0800 | [diff] [blame] | 403 | = _pmbus_read_byte_data(client, i, |
| 404 | PMBUS_STATUS_FAN_12); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 405 | } |
| 406 | |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 407 | for (i = 0; i < info->pages; i++) { |
| 408 | if (!(info->func[i] & PMBUS_HAVE_STATUS_FAN34)) |
| 409 | continue; |
| 410 | data->status[PB_STATUS_FAN34_BASE + i] |
Guenter Roeck | 2cfa6ae | 2011-03-08 23:00:10 -0800 | [diff] [blame] | 411 | = _pmbus_read_byte_data(client, i, |
| 412 | PMBUS_STATUS_FAN_34); |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 413 | } |
| 414 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 415 | if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) |
| 416 | data->status[PB_STATUS_INPUT_BASE] |
Guenter Roeck | 2cfa6ae | 2011-03-08 23:00:10 -0800 | [diff] [blame] | 417 | = _pmbus_read_byte_data(client, 0, |
| 418 | PMBUS_STATUS_INPUT); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 419 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 420 | for (i = 0; i < data->num_sensors; i++) { |
| 421 | struct pmbus_sensor *sensor = &data->sensors[i]; |
| 422 | |
| 423 | if (!data->valid || sensor->update) |
| 424 | sensor->data |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 425 | = _pmbus_read_word_data(client, |
| 426 | sensor->page, |
| 427 | sensor->reg); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 428 | } |
| 429 | pmbus_clear_faults(client); |
| 430 | data->last_updated = jiffies; |
| 431 | data->valid = 1; |
| 432 | } |
| 433 | mutex_unlock(&data->update_lock); |
| 434 | return data; |
| 435 | } |
| 436 | |
| 437 | /* |
| 438 | * Convert linear sensor values to milli- or micro-units |
| 439 | * depending on sensor type. |
| 440 | */ |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 441 | static long pmbus_reg2data_linear(struct pmbus_data *data, |
| 442 | struct pmbus_sensor *sensor) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 443 | { |
Guenter Roeck | 9f6ad1c | 2011-03-07 18:34:50 -0800 | [diff] [blame] | 444 | s16 exponent; |
| 445 | s32 mantissa; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 446 | long val; |
| 447 | |
Guenter Roeck | 9f6ad1c | 2011-03-07 18:34:50 -0800 | [diff] [blame] | 448 | if (sensor->class == PSC_VOLTAGE_OUT) { /* LINEAR16 */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 449 | exponent = data->exponent; |
Guenter Roeck | 9f6ad1c | 2011-03-07 18:34:50 -0800 | [diff] [blame] | 450 | mantissa = (u16) sensor->data; |
| 451 | } else { /* LINEAR11 */ |
Guenter Roeck | 1af1f53 | 2011-09-28 11:36:20 -0700 | [diff] [blame] | 452 | exponent = ((s16)sensor->data) >> 11; |
| 453 | mantissa = ((s16)((sensor->data & 0x7ff) << 5)) >> 5; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 454 | } |
| 455 | |
| 456 | val = mantissa; |
| 457 | |
| 458 | /* scale result to milli-units for all sensors except fans */ |
| 459 | if (sensor->class != PSC_FAN) |
| 460 | val = val * 1000L; |
| 461 | |
| 462 | /* scale result to micro-units for power sensors */ |
| 463 | if (sensor->class == PSC_POWER) |
| 464 | val = val * 1000L; |
| 465 | |
| 466 | if (exponent >= 0) |
| 467 | val <<= exponent; |
| 468 | else |
| 469 | val >>= -exponent; |
| 470 | |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 471 | return val; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 472 | } |
| 473 | |
| 474 | /* |
| 475 | * Convert direct sensor values to milli- or micro-units |
| 476 | * depending on sensor type. |
| 477 | */ |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 478 | static long pmbus_reg2data_direct(struct pmbus_data *data, |
| 479 | struct pmbus_sensor *sensor) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 480 | { |
| 481 | long val = (s16) sensor->data; |
| 482 | long m, b, R; |
| 483 | |
| 484 | m = data->info->m[sensor->class]; |
| 485 | b = data->info->b[sensor->class]; |
| 486 | R = data->info->R[sensor->class]; |
| 487 | |
| 488 | if (m == 0) |
| 489 | return 0; |
| 490 | |
| 491 | /* X = 1/m * (Y * 10^-R - b) */ |
| 492 | R = -R; |
| 493 | /* scale result to milli-units for everything but fans */ |
| 494 | if (sensor->class != PSC_FAN) { |
| 495 | R += 3; |
| 496 | b *= 1000; |
| 497 | } |
| 498 | |
| 499 | /* scale result to micro-units for power sensors */ |
| 500 | if (sensor->class == PSC_POWER) { |
| 501 | R += 3; |
| 502 | b *= 1000; |
| 503 | } |
| 504 | |
| 505 | while (R > 0) { |
| 506 | val *= 10; |
| 507 | R--; |
| 508 | } |
| 509 | while (R < 0) { |
| 510 | val = DIV_ROUND_CLOSEST(val, 10); |
| 511 | R++; |
| 512 | } |
| 513 | |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 514 | return (val - b) / m; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 515 | } |
| 516 | |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 517 | /* |
| 518 | * Convert VID sensor values to milli- or micro-units |
| 519 | * depending on sensor type. |
| 520 | * We currently only support VR11. |
| 521 | */ |
| 522 | static long pmbus_reg2data_vid(struct pmbus_data *data, |
| 523 | struct pmbus_sensor *sensor) |
| 524 | { |
| 525 | long val = sensor->data; |
| 526 | |
| 527 | if (val < 0x02 || val > 0xb2) |
| 528 | return 0; |
| 529 | return DIV_ROUND_CLOSEST(160000 - (val - 2) * 625, 100); |
| 530 | } |
| 531 | |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 532 | static long pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 533 | { |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 534 | long val; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 535 | |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 536 | switch (data->info->format[sensor->class]) { |
| 537 | case direct: |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 538 | val = pmbus_reg2data_direct(data, sensor); |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 539 | break; |
| 540 | case vid: |
| 541 | val = pmbus_reg2data_vid(data, sensor); |
| 542 | break; |
| 543 | case linear: |
| 544 | default: |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 545 | val = pmbus_reg2data_linear(data, sensor); |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 546 | break; |
| 547 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 548 | return val; |
| 549 | } |
| 550 | |
| 551 | #define MAX_MANTISSA (1023 * 1000) |
| 552 | #define MIN_MANTISSA (511 * 1000) |
| 553 | |
| 554 | static u16 pmbus_data2reg_linear(struct pmbus_data *data, |
| 555 | enum pmbus_sensor_classes class, long val) |
| 556 | { |
Guenter Roeck | 9f6ad1c | 2011-03-07 18:34:50 -0800 | [diff] [blame] | 557 | s16 exponent = 0, mantissa; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 558 | bool negative = false; |
| 559 | |
| 560 | /* simple case */ |
| 561 | if (val == 0) |
| 562 | return 0; |
| 563 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 564 | if (class == PSC_VOLTAGE_OUT) { |
Guenter Roeck | 9f6ad1c | 2011-03-07 18:34:50 -0800 | [diff] [blame] | 565 | /* LINEAR16 does not support negative voltages */ |
| 566 | if (val < 0) |
| 567 | return 0; |
| 568 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 569 | /* |
| 570 | * For a static exponents, we don't have a choice |
| 571 | * but to adjust the value to it. |
| 572 | */ |
| 573 | if (data->exponent < 0) |
| 574 | val <<= -data->exponent; |
| 575 | else |
| 576 | val >>= data->exponent; |
| 577 | val = DIV_ROUND_CLOSEST(val, 1000); |
Guenter Roeck | 9f6ad1c | 2011-03-07 18:34:50 -0800 | [diff] [blame] | 578 | return val & 0xffff; |
| 579 | } |
| 580 | |
| 581 | if (val < 0) { |
| 582 | negative = true; |
| 583 | val = -val; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 584 | } |
| 585 | |
| 586 | /* Power is in uW. Convert to mW before converting. */ |
| 587 | if (class == PSC_POWER) |
| 588 | val = DIV_ROUND_CLOSEST(val, 1000L); |
| 589 | |
| 590 | /* |
| 591 | * For simplicity, convert fan data to milli-units |
| 592 | * before calculating the exponent. |
| 593 | */ |
| 594 | if (class == PSC_FAN) |
| 595 | val = val * 1000; |
| 596 | |
| 597 | /* Reduce large mantissa until it fits into 10 bit */ |
| 598 | while (val >= MAX_MANTISSA && exponent < 15) { |
| 599 | exponent++; |
| 600 | val >>= 1; |
| 601 | } |
| 602 | /* Increase small mantissa to improve precision */ |
| 603 | while (val < MIN_MANTISSA && exponent > -15) { |
| 604 | exponent--; |
| 605 | val <<= 1; |
| 606 | } |
| 607 | |
| 608 | /* Convert mantissa from milli-units to units */ |
| 609 | mantissa = DIV_ROUND_CLOSEST(val, 1000); |
| 610 | |
| 611 | /* Ensure that resulting number is within range */ |
| 612 | if (mantissa > 0x3ff) |
| 613 | mantissa = 0x3ff; |
| 614 | |
| 615 | /* restore sign */ |
| 616 | if (negative) |
| 617 | mantissa = -mantissa; |
| 618 | |
| 619 | /* Convert to 5 bit exponent, 11 bit mantissa */ |
| 620 | return (mantissa & 0x7ff) | ((exponent << 11) & 0xf800); |
| 621 | } |
| 622 | |
| 623 | static u16 pmbus_data2reg_direct(struct pmbus_data *data, |
| 624 | enum pmbus_sensor_classes class, long val) |
| 625 | { |
| 626 | long m, b, R; |
| 627 | |
| 628 | m = data->info->m[class]; |
| 629 | b = data->info->b[class]; |
| 630 | R = data->info->R[class]; |
| 631 | |
| 632 | /* Power is in uW. Adjust R and b. */ |
| 633 | if (class == PSC_POWER) { |
| 634 | R -= 3; |
| 635 | b *= 1000; |
| 636 | } |
| 637 | |
| 638 | /* Calculate Y = (m * X + b) * 10^R */ |
| 639 | if (class != PSC_FAN) { |
| 640 | R -= 3; /* Adjust R and b for data in milli-units */ |
| 641 | b *= 1000; |
| 642 | } |
| 643 | val = val * m + b; |
| 644 | |
| 645 | while (R > 0) { |
| 646 | val *= 10; |
| 647 | R--; |
| 648 | } |
| 649 | while (R < 0) { |
| 650 | val = DIV_ROUND_CLOSEST(val, 10); |
| 651 | R++; |
| 652 | } |
| 653 | |
| 654 | return val; |
| 655 | } |
| 656 | |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 657 | static u16 pmbus_data2reg_vid(struct pmbus_data *data, |
| 658 | enum pmbus_sensor_classes class, long val) |
| 659 | { |
| 660 | val = SENSORS_LIMIT(val, 500, 1600); |
| 661 | |
| 662 | return 2 + DIV_ROUND_CLOSEST((1600 - val) * 100, 625); |
| 663 | } |
| 664 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 665 | static u16 pmbus_data2reg(struct pmbus_data *data, |
| 666 | enum pmbus_sensor_classes class, long val) |
| 667 | { |
| 668 | u16 regval; |
| 669 | |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 670 | switch (data->info->format[class]) { |
| 671 | case direct: |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 672 | regval = pmbus_data2reg_direct(data, class, val); |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 673 | break; |
| 674 | case vid: |
| 675 | regval = pmbus_data2reg_vid(data, class, val); |
| 676 | break; |
| 677 | case linear: |
| 678 | default: |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 679 | regval = pmbus_data2reg_linear(data, class, val); |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 680 | break; |
| 681 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 682 | return regval; |
| 683 | } |
| 684 | |
| 685 | /* |
| 686 | * Return boolean calculated from converted data. |
| 687 | * <index> defines a status register index and mask, and optionally |
| 688 | * two sensor indexes. |
| 689 | * The upper half-word references the two sensors, |
| 690 | * two sensor indices. |
| 691 | * The upper half-word references the two optional sensors, |
| 692 | * the lower half word references status register and mask. |
| 693 | * The function returns true if (status[reg] & mask) is true and, |
| 694 | * if specified, if v1 >= v2. |
| 695 | * To determine if an object exceeds upper limits, specify <v, limit>. |
| 696 | * To determine if an object exceeds lower limits, specify <limit, v>. |
| 697 | * |
| 698 | * For booleans created with pmbus_add_boolean_reg(), only the lower 16 bits of |
| 699 | * index are set. s1 and s2 (the sensor index values) are zero in this case. |
| 700 | * The function returns true if (status[reg] & mask) is true. |
| 701 | * |
| 702 | * If the boolean was created with pmbus_add_boolean_cmp(), a comparison against |
| 703 | * a specified limit has to be performed to determine the boolean result. |
| 704 | * In this case, the function returns true if v1 >= v2 (where v1 and v2 are |
| 705 | * sensor values referenced by sensor indices s1 and s2). |
| 706 | * |
| 707 | * To determine if an object exceeds upper limits, specify <s1,s2> = <v,limit>. |
| 708 | * To determine if an object exceeds lower limits, specify <s1,s2> = <limit,v>. |
| 709 | * |
| 710 | * If a negative value is stored in any of the referenced registers, this value |
| 711 | * reflects an error code which will be returned. |
| 712 | */ |
| 713 | static int pmbus_get_boolean(struct pmbus_data *data, int index, int *val) |
| 714 | { |
| 715 | u8 s1 = (index >> 24) & 0xff; |
| 716 | u8 s2 = (index >> 16) & 0xff; |
| 717 | u8 reg = (index >> 8) & 0xff; |
| 718 | u8 mask = index & 0xff; |
| 719 | int status; |
| 720 | u8 regval; |
| 721 | |
| 722 | status = data->status[reg]; |
| 723 | if (status < 0) |
| 724 | return status; |
| 725 | |
| 726 | regval = status & mask; |
| 727 | if (!s1 && !s2) |
| 728 | *val = !!regval; |
| 729 | else { |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 730 | long v1, v2; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 731 | struct pmbus_sensor *sensor1, *sensor2; |
| 732 | |
| 733 | sensor1 = &data->sensors[s1]; |
| 734 | if (sensor1->data < 0) |
| 735 | return sensor1->data; |
| 736 | sensor2 = &data->sensors[s2]; |
| 737 | if (sensor2->data < 0) |
| 738 | return sensor2->data; |
| 739 | |
| 740 | v1 = pmbus_reg2data(data, sensor1); |
| 741 | v2 = pmbus_reg2data(data, sensor2); |
| 742 | *val = !!(regval && v1 >= v2); |
| 743 | } |
| 744 | return 0; |
| 745 | } |
| 746 | |
| 747 | static ssize_t pmbus_show_boolean(struct device *dev, |
| 748 | struct device_attribute *da, char *buf) |
| 749 | { |
| 750 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 751 | struct pmbus_data *data = pmbus_update_device(dev); |
| 752 | int val; |
| 753 | int err; |
| 754 | |
| 755 | err = pmbus_get_boolean(data, attr->index, &val); |
| 756 | if (err) |
| 757 | return err; |
| 758 | return snprintf(buf, PAGE_SIZE, "%d\n", val); |
| 759 | } |
| 760 | |
| 761 | static ssize_t pmbus_show_sensor(struct device *dev, |
| 762 | struct device_attribute *da, char *buf) |
| 763 | { |
| 764 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 765 | struct pmbus_data *data = pmbus_update_device(dev); |
| 766 | struct pmbus_sensor *sensor; |
| 767 | |
| 768 | sensor = &data->sensors[attr->index]; |
| 769 | if (sensor->data < 0) |
| 770 | return sensor->data; |
| 771 | |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 772 | return snprintf(buf, PAGE_SIZE, "%ld\n", pmbus_reg2data(data, sensor)); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 773 | } |
| 774 | |
| 775 | static ssize_t pmbus_set_sensor(struct device *dev, |
| 776 | struct device_attribute *devattr, |
| 777 | const char *buf, size_t count) |
| 778 | { |
| 779 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 780 | struct i2c_client *client = to_i2c_client(dev); |
| 781 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 782 | struct pmbus_sensor *sensor = &data->sensors[attr->index]; |
| 783 | ssize_t rv = count; |
| 784 | long val = 0; |
| 785 | int ret; |
| 786 | u16 regval; |
| 787 | |
Guenter Roeck | 0117c3f | 2012-01-16 10:14:54 -0800 | [diff] [blame] | 788 | if (kstrtol(buf, 10, &val) < 0) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 789 | return -EINVAL; |
| 790 | |
| 791 | mutex_lock(&data->update_lock); |
| 792 | regval = pmbus_data2reg(data, sensor->class, val); |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 793 | ret = _pmbus_write_word_data(client, sensor->page, sensor->reg, regval); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 794 | if (ret < 0) |
| 795 | rv = ret; |
| 796 | else |
| 797 | data->sensors[attr->index].data = regval; |
| 798 | mutex_unlock(&data->update_lock); |
| 799 | return rv; |
| 800 | } |
| 801 | |
| 802 | static ssize_t pmbus_show_label(struct device *dev, |
| 803 | struct device_attribute *da, char *buf) |
| 804 | { |
| 805 | struct i2c_client *client = to_i2c_client(dev); |
| 806 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 807 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 808 | |
| 809 | return snprintf(buf, PAGE_SIZE, "%s\n", |
| 810 | data->labels[attr->index].label); |
| 811 | } |
| 812 | |
| 813 | #define PMBUS_ADD_ATTR(data, _name, _idx, _mode, _type, _show, _set) \ |
| 814 | do { \ |
| 815 | struct sensor_device_attribute *a \ |
| 816 | = &data->_type##s[data->num_##_type##s].attribute; \ |
| 817 | BUG_ON(data->num_attributes >= data->max_attributes); \ |
Guenter Roeck | eec752b | 2011-05-24 12:16:40 -0700 | [diff] [blame] | 818 | sysfs_attr_init(&a->dev_attr.attr); \ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 819 | a->dev_attr.attr.name = _name; \ |
| 820 | a->dev_attr.attr.mode = _mode; \ |
| 821 | a->dev_attr.show = _show; \ |
| 822 | a->dev_attr.store = _set; \ |
| 823 | a->index = _idx; \ |
| 824 | data->attributes[data->num_attributes] = &a->dev_attr.attr; \ |
| 825 | data->num_attributes++; \ |
| 826 | } while (0) |
| 827 | |
| 828 | #define PMBUS_ADD_GET_ATTR(data, _name, _type, _idx) \ |
| 829 | PMBUS_ADD_ATTR(data, _name, _idx, S_IRUGO, _type, \ |
| 830 | pmbus_show_##_type, NULL) |
| 831 | |
| 832 | #define PMBUS_ADD_SET_ATTR(data, _name, _type, _idx) \ |
| 833 | PMBUS_ADD_ATTR(data, _name, _idx, S_IWUSR | S_IRUGO, _type, \ |
| 834 | pmbus_show_##_type, pmbus_set_##_type) |
| 835 | |
| 836 | static void pmbus_add_boolean(struct pmbus_data *data, |
| 837 | const char *name, const char *type, int seq, |
| 838 | int idx) |
| 839 | { |
| 840 | struct pmbus_boolean *boolean; |
| 841 | |
| 842 | BUG_ON(data->num_booleans >= data->max_booleans); |
| 843 | |
| 844 | boolean = &data->booleans[data->num_booleans]; |
| 845 | |
| 846 | snprintf(boolean->name, sizeof(boolean->name), "%s%d_%s", |
| 847 | name, seq, type); |
| 848 | PMBUS_ADD_GET_ATTR(data, boolean->name, boolean, idx); |
| 849 | data->num_booleans++; |
| 850 | } |
| 851 | |
| 852 | static void pmbus_add_boolean_reg(struct pmbus_data *data, |
| 853 | const char *name, const char *type, |
| 854 | int seq, int reg, int bit) |
| 855 | { |
| 856 | pmbus_add_boolean(data, name, type, seq, (reg << 8) | bit); |
| 857 | } |
| 858 | |
| 859 | static void pmbus_add_boolean_cmp(struct pmbus_data *data, |
| 860 | const char *name, const char *type, |
| 861 | int seq, int i1, int i2, int reg, int mask) |
| 862 | { |
| 863 | pmbus_add_boolean(data, name, type, seq, |
| 864 | (i1 << 24) | (i2 << 16) | (reg << 8) | mask); |
| 865 | } |
| 866 | |
| 867 | static void pmbus_add_sensor(struct pmbus_data *data, |
| 868 | const char *name, const char *type, int seq, |
| 869 | int page, int reg, enum pmbus_sensor_classes class, |
Guenter Roeck | 3506999 | 2011-03-21 21:31:00 -0700 | [diff] [blame] | 870 | bool update, bool readonly) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 871 | { |
| 872 | struct pmbus_sensor *sensor; |
| 873 | |
| 874 | BUG_ON(data->num_sensors >= data->max_sensors); |
| 875 | |
| 876 | sensor = &data->sensors[data->num_sensors]; |
| 877 | snprintf(sensor->name, sizeof(sensor->name), "%s%d_%s", |
| 878 | name, seq, type); |
| 879 | sensor->page = page; |
| 880 | sensor->reg = reg; |
| 881 | sensor->class = class; |
| 882 | sensor->update = update; |
Guenter Roeck | 3506999 | 2011-03-21 21:31:00 -0700 | [diff] [blame] | 883 | if (readonly) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 884 | PMBUS_ADD_GET_ATTR(data, sensor->name, sensor, |
| 885 | data->num_sensors); |
| 886 | else |
| 887 | PMBUS_ADD_SET_ATTR(data, sensor->name, sensor, |
| 888 | data->num_sensors); |
| 889 | data->num_sensors++; |
| 890 | } |
| 891 | |
| 892 | static void pmbus_add_label(struct pmbus_data *data, |
| 893 | const char *name, int seq, |
| 894 | const char *lstring, int index) |
| 895 | { |
| 896 | struct pmbus_label *label; |
| 897 | |
| 898 | BUG_ON(data->num_labels >= data->max_labels); |
| 899 | |
| 900 | label = &data->labels[data->num_labels]; |
| 901 | snprintf(label->name, sizeof(label->name), "%s%d_label", name, seq); |
| 902 | if (!index) |
| 903 | strncpy(label->label, lstring, sizeof(label->label) - 1); |
| 904 | else |
| 905 | snprintf(label->label, sizeof(label->label), "%s%d", lstring, |
| 906 | index); |
| 907 | |
| 908 | PMBUS_ADD_GET_ATTR(data, label->name, label, data->num_labels); |
| 909 | data->num_labels++; |
| 910 | } |
| 911 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 912 | /* |
| 913 | * Determine maximum number of sensors, booleans, and labels. |
| 914 | * To keep things simple, only make a rough high estimate. |
| 915 | */ |
| 916 | static void pmbus_find_max_attr(struct i2c_client *client, |
| 917 | struct pmbus_data *data) |
| 918 | { |
| 919 | const struct pmbus_driver_info *info = data->info; |
| 920 | int page, max_sensors, max_booleans, max_labels; |
| 921 | |
| 922 | max_sensors = PMBUS_MAX_INPUT_SENSORS; |
| 923 | max_booleans = PMBUS_MAX_INPUT_BOOLEANS; |
| 924 | max_labels = PMBUS_MAX_INPUT_LABELS; |
| 925 | |
| 926 | for (page = 0; page < info->pages; page++) { |
| 927 | if (info->func[page] & PMBUS_HAVE_VOUT) { |
| 928 | max_sensors += PMBUS_VOUT_SENSORS_PER_PAGE; |
| 929 | max_booleans += PMBUS_VOUT_BOOLEANS_PER_PAGE; |
| 930 | max_labels++; |
| 931 | } |
| 932 | if (info->func[page] & PMBUS_HAVE_IOUT) { |
| 933 | max_sensors += PMBUS_IOUT_SENSORS_PER_PAGE; |
| 934 | max_booleans += PMBUS_IOUT_BOOLEANS_PER_PAGE; |
| 935 | max_labels++; |
| 936 | } |
| 937 | if (info->func[page] & PMBUS_HAVE_POUT) { |
| 938 | max_sensors += PMBUS_POUT_SENSORS_PER_PAGE; |
| 939 | max_booleans += PMBUS_POUT_BOOLEANS_PER_PAGE; |
| 940 | max_labels++; |
| 941 | } |
| 942 | if (info->func[page] & PMBUS_HAVE_FAN12) { |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 943 | max_sensors += 2 * PMBUS_MAX_SENSORS_PER_FAN; |
| 944 | max_booleans += 2 * PMBUS_MAX_BOOLEANS_PER_FAN; |
| 945 | } |
| 946 | if (info->func[page] & PMBUS_HAVE_FAN34) { |
| 947 | max_sensors += 2 * PMBUS_MAX_SENSORS_PER_FAN; |
| 948 | max_booleans += 2 * PMBUS_MAX_BOOLEANS_PER_FAN; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 949 | } |
| 950 | if (info->func[page] & PMBUS_HAVE_TEMP) { |
Guenter Roeck | b49547a | 2011-03-06 10:56:52 -0800 | [diff] [blame] | 951 | max_sensors += PMBUS_MAX_SENSORS_PER_TEMP; |
| 952 | max_booleans += PMBUS_MAX_BOOLEANS_PER_TEMP; |
| 953 | } |
| 954 | if (info->func[page] & PMBUS_HAVE_TEMP2) { |
| 955 | max_sensors += PMBUS_MAX_SENSORS_PER_TEMP; |
| 956 | max_booleans += PMBUS_MAX_BOOLEANS_PER_TEMP; |
| 957 | } |
| 958 | if (info->func[page] & PMBUS_HAVE_TEMP3) { |
| 959 | max_sensors += PMBUS_MAX_SENSORS_PER_TEMP; |
| 960 | max_booleans += PMBUS_MAX_BOOLEANS_PER_TEMP; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 961 | } |
| 962 | } |
| 963 | data->max_sensors = max_sensors; |
| 964 | data->max_booleans = max_booleans; |
| 965 | data->max_labels = max_labels; |
| 966 | data->max_attributes = max_sensors + max_booleans + max_labels; |
| 967 | } |
| 968 | |
| 969 | /* |
| 970 | * Search for attributes. Allocate sensors, booleans, and labels as needed. |
| 971 | */ |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 972 | |
| 973 | /* |
| 974 | * The pmbus_limit_attr structure describes a single limit attribute |
| 975 | * and its associated alarm attribute. |
| 976 | */ |
| 977 | struct pmbus_limit_attr { |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 978 | u16 reg; /* Limit register */ |
| 979 | bool update; /* True if register needs updates */ |
Guenter Roeck | 40257b9 | 2011-09-10 06:02:12 -0700 | [diff] [blame] | 980 | bool low; /* True if low limit; for limits with compare |
| 981 | functions only */ |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 982 | const char *attr; /* Attribute name */ |
| 983 | const char *alarm; /* Alarm attribute name */ |
| 984 | u32 sbit; /* Alarm attribute status bit */ |
| 985 | }; |
| 986 | |
| 987 | /* |
| 988 | * The pmbus_sensor_attr structure describes one sensor attribute. This |
| 989 | * description includes a reference to the associated limit attributes. |
| 990 | */ |
| 991 | struct pmbus_sensor_attr { |
| 992 | u8 reg; /* sensor register */ |
| 993 | enum pmbus_sensor_classes class;/* sensor class */ |
| 994 | const char *label; /* sensor label */ |
| 995 | bool paged; /* true if paged sensor */ |
| 996 | bool update; /* true if update needed */ |
| 997 | bool compare; /* true if compare function needed */ |
| 998 | u32 func; /* sensor mask */ |
| 999 | u32 sfunc; /* sensor status mask */ |
| 1000 | int sbase; /* status base register */ |
| 1001 | u32 gbit; /* generic status bit */ |
| 1002 | const struct pmbus_limit_attr *limit;/* limit registers */ |
| 1003 | int nlimit; /* # of limit registers */ |
| 1004 | }; |
| 1005 | |
| 1006 | /* |
| 1007 | * Add a set of limit attributes and, if supported, the associated |
| 1008 | * alarm attributes. |
| 1009 | */ |
| 1010 | static bool pmbus_add_limit_attrs(struct i2c_client *client, |
| 1011 | struct pmbus_data *data, |
| 1012 | const struct pmbus_driver_info *info, |
| 1013 | const char *name, int index, int page, |
| 1014 | int cbase, |
| 1015 | const struct pmbus_sensor_attr *attr) |
| 1016 | { |
| 1017 | const struct pmbus_limit_attr *l = attr->limit; |
| 1018 | int nlimit = attr->nlimit; |
| 1019 | bool have_alarm = false; |
| 1020 | int i, cindex; |
| 1021 | |
| 1022 | for (i = 0; i < nlimit; i++) { |
| 1023 | if (pmbus_check_word_register(client, page, l->reg)) { |
| 1024 | cindex = data->num_sensors; |
| 1025 | pmbus_add_sensor(data, name, l->attr, index, page, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1026 | l->reg, attr->class, |
| 1027 | attr->update || l->update, |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1028 | false); |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1029 | if (l->sbit && (info->func[page] & attr->sfunc)) { |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1030 | if (attr->compare) { |
| 1031 | pmbus_add_boolean_cmp(data, name, |
| 1032 | l->alarm, index, |
Guenter Roeck | 40257b9 | 2011-09-10 06:02:12 -0700 | [diff] [blame] | 1033 | l->low ? cindex : cbase, |
| 1034 | l->low ? cbase : cindex, |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1035 | attr->sbase + page, l->sbit); |
| 1036 | } else { |
| 1037 | pmbus_add_boolean_reg(data, name, |
| 1038 | l->alarm, index, |
| 1039 | attr->sbase + page, l->sbit); |
| 1040 | } |
| 1041 | have_alarm = true; |
| 1042 | } |
| 1043 | } |
| 1044 | l++; |
| 1045 | } |
| 1046 | return have_alarm; |
| 1047 | } |
| 1048 | |
| 1049 | static void pmbus_add_sensor_attrs_one(struct i2c_client *client, |
| 1050 | struct pmbus_data *data, |
| 1051 | const struct pmbus_driver_info *info, |
| 1052 | const char *name, |
| 1053 | int index, int page, |
| 1054 | const struct pmbus_sensor_attr *attr) |
| 1055 | { |
| 1056 | bool have_alarm; |
| 1057 | int cbase = data->num_sensors; |
| 1058 | |
| 1059 | if (attr->label) |
| 1060 | pmbus_add_label(data, name, index, attr->label, |
| 1061 | attr->paged ? page + 1 : 0); |
| 1062 | pmbus_add_sensor(data, name, "input", index, page, attr->reg, |
| 1063 | attr->class, true, true); |
| 1064 | if (attr->sfunc) { |
| 1065 | have_alarm = pmbus_add_limit_attrs(client, data, info, name, |
| 1066 | index, page, cbase, attr); |
| 1067 | /* |
| 1068 | * Add generic alarm attribute only if there are no individual |
Guenter Roeck | c6bfb76 | 2011-07-09 12:06:45 -0700 | [diff] [blame] | 1069 | * alarm attributes, if there is a global alarm bit, and if |
| 1070 | * the generic status register for this page is accessible. |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1071 | */ |
Guenter Roeck | c6bfb76 | 2011-07-09 12:06:45 -0700 | [diff] [blame] | 1072 | if (!have_alarm && attr->gbit && |
| 1073 | pmbus_check_byte_register(client, page, PMBUS_STATUS_BYTE)) |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1074 | pmbus_add_boolean_reg(data, name, "alarm", index, |
| 1075 | PB_STATUS_BASE + page, |
| 1076 | attr->gbit); |
| 1077 | } |
| 1078 | } |
| 1079 | |
| 1080 | static void pmbus_add_sensor_attrs(struct i2c_client *client, |
| 1081 | struct pmbus_data *data, |
| 1082 | const char *name, |
| 1083 | const struct pmbus_sensor_attr *attrs, |
| 1084 | int nattrs) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1085 | { |
| 1086 | const struct pmbus_driver_info *info = data->info; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1087 | int index, i; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1088 | |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1089 | index = 1; |
| 1090 | for (i = 0; i < nattrs; i++) { |
| 1091 | int page, pages; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1092 | |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1093 | pages = attrs->paged ? info->pages : 1; |
| 1094 | for (page = 0; page < pages; page++) { |
| 1095 | if (!(info->func[page] & attrs->func)) |
Guenter Roeck | b49547a | 2011-03-06 10:56:52 -0800 | [diff] [blame] | 1096 | continue; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1097 | pmbus_add_sensor_attrs_one(client, data, info, name, |
| 1098 | index, page, attrs); |
| 1099 | index++; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1100 | } |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1101 | attrs++; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1102 | } |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1103 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1104 | |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1105 | static const struct pmbus_limit_attr vin_limit_attrs[] = { |
| 1106 | { |
| 1107 | .reg = PMBUS_VIN_UV_WARN_LIMIT, |
| 1108 | .attr = "min", |
| 1109 | .alarm = "min_alarm", |
| 1110 | .sbit = PB_VOLTAGE_UV_WARNING, |
| 1111 | }, { |
| 1112 | .reg = PMBUS_VIN_UV_FAULT_LIMIT, |
| 1113 | .attr = "lcrit", |
| 1114 | .alarm = "lcrit_alarm", |
| 1115 | .sbit = PB_VOLTAGE_UV_FAULT, |
| 1116 | }, { |
| 1117 | .reg = PMBUS_VIN_OV_WARN_LIMIT, |
| 1118 | .attr = "max", |
| 1119 | .alarm = "max_alarm", |
| 1120 | .sbit = PB_VOLTAGE_OV_WARNING, |
| 1121 | }, { |
| 1122 | .reg = PMBUS_VIN_OV_FAULT_LIMIT, |
| 1123 | .attr = "crit", |
| 1124 | .alarm = "crit_alarm", |
| 1125 | .sbit = PB_VOLTAGE_OV_FAULT, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1126 | }, { |
| 1127 | .reg = PMBUS_VIRT_READ_VIN_AVG, |
| 1128 | .update = true, |
| 1129 | .attr = "average", |
| 1130 | }, { |
| 1131 | .reg = PMBUS_VIRT_READ_VIN_MIN, |
| 1132 | .update = true, |
| 1133 | .attr = "lowest", |
| 1134 | }, { |
| 1135 | .reg = PMBUS_VIRT_READ_VIN_MAX, |
| 1136 | .update = true, |
| 1137 | .attr = "highest", |
| 1138 | }, { |
| 1139 | .reg = PMBUS_VIRT_RESET_VIN_HISTORY, |
| 1140 | .attr = "reset_history", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1141 | }, |
| 1142 | }; |
| 1143 | |
| 1144 | static const struct pmbus_limit_attr vout_limit_attrs[] = { |
| 1145 | { |
| 1146 | .reg = PMBUS_VOUT_UV_WARN_LIMIT, |
| 1147 | .attr = "min", |
| 1148 | .alarm = "min_alarm", |
| 1149 | .sbit = PB_VOLTAGE_UV_WARNING, |
| 1150 | }, { |
| 1151 | .reg = PMBUS_VOUT_UV_FAULT_LIMIT, |
| 1152 | .attr = "lcrit", |
| 1153 | .alarm = "lcrit_alarm", |
| 1154 | .sbit = PB_VOLTAGE_UV_FAULT, |
| 1155 | }, { |
| 1156 | .reg = PMBUS_VOUT_OV_WARN_LIMIT, |
| 1157 | .attr = "max", |
| 1158 | .alarm = "max_alarm", |
| 1159 | .sbit = PB_VOLTAGE_OV_WARNING, |
| 1160 | }, { |
| 1161 | .reg = PMBUS_VOUT_OV_FAULT_LIMIT, |
| 1162 | .attr = "crit", |
| 1163 | .alarm = "crit_alarm", |
| 1164 | .sbit = PB_VOLTAGE_OV_FAULT, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1165 | }, { |
| 1166 | .reg = PMBUS_VIRT_READ_VOUT_AVG, |
| 1167 | .update = true, |
| 1168 | .attr = "average", |
| 1169 | }, { |
| 1170 | .reg = PMBUS_VIRT_READ_VOUT_MIN, |
| 1171 | .update = true, |
| 1172 | .attr = "lowest", |
| 1173 | }, { |
| 1174 | .reg = PMBUS_VIRT_READ_VOUT_MAX, |
| 1175 | .update = true, |
| 1176 | .attr = "highest", |
| 1177 | }, { |
| 1178 | .reg = PMBUS_VIRT_RESET_VOUT_HISTORY, |
| 1179 | .attr = "reset_history", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1180 | } |
| 1181 | }; |
| 1182 | |
| 1183 | static const struct pmbus_sensor_attr voltage_attributes[] = { |
| 1184 | { |
| 1185 | .reg = PMBUS_READ_VIN, |
| 1186 | .class = PSC_VOLTAGE_IN, |
| 1187 | .label = "vin", |
| 1188 | .func = PMBUS_HAVE_VIN, |
| 1189 | .sfunc = PMBUS_HAVE_STATUS_INPUT, |
| 1190 | .sbase = PB_STATUS_INPUT_BASE, |
| 1191 | .gbit = PB_STATUS_VIN_UV, |
| 1192 | .limit = vin_limit_attrs, |
| 1193 | .nlimit = ARRAY_SIZE(vin_limit_attrs), |
| 1194 | }, { |
| 1195 | .reg = PMBUS_READ_VCAP, |
| 1196 | .class = PSC_VOLTAGE_IN, |
| 1197 | .label = "vcap", |
| 1198 | .func = PMBUS_HAVE_VCAP, |
| 1199 | }, { |
| 1200 | .reg = PMBUS_READ_VOUT, |
| 1201 | .class = PSC_VOLTAGE_OUT, |
| 1202 | .label = "vout", |
| 1203 | .paged = true, |
| 1204 | .func = PMBUS_HAVE_VOUT, |
| 1205 | .sfunc = PMBUS_HAVE_STATUS_VOUT, |
| 1206 | .sbase = PB_STATUS_VOUT_BASE, |
| 1207 | .gbit = PB_STATUS_VOUT_OV, |
| 1208 | .limit = vout_limit_attrs, |
| 1209 | .nlimit = ARRAY_SIZE(vout_limit_attrs), |
| 1210 | } |
| 1211 | }; |
| 1212 | |
| 1213 | /* Current attributes */ |
| 1214 | |
| 1215 | static const struct pmbus_limit_attr iin_limit_attrs[] = { |
| 1216 | { |
| 1217 | .reg = PMBUS_IIN_OC_WARN_LIMIT, |
| 1218 | .attr = "max", |
| 1219 | .alarm = "max_alarm", |
| 1220 | .sbit = PB_IIN_OC_WARNING, |
| 1221 | }, { |
| 1222 | .reg = PMBUS_IIN_OC_FAULT_LIMIT, |
| 1223 | .attr = "crit", |
| 1224 | .alarm = "crit_alarm", |
| 1225 | .sbit = PB_IIN_OC_FAULT, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1226 | }, { |
| 1227 | .reg = PMBUS_VIRT_READ_IIN_AVG, |
| 1228 | .update = true, |
| 1229 | .attr = "average", |
| 1230 | }, { |
| 1231 | .reg = PMBUS_VIRT_READ_IIN_MIN, |
| 1232 | .update = true, |
| 1233 | .attr = "lowest", |
| 1234 | }, { |
| 1235 | .reg = PMBUS_VIRT_READ_IIN_MAX, |
| 1236 | .update = true, |
| 1237 | .attr = "highest", |
| 1238 | }, { |
| 1239 | .reg = PMBUS_VIRT_RESET_IIN_HISTORY, |
| 1240 | .attr = "reset_history", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1241 | } |
| 1242 | }; |
| 1243 | |
| 1244 | static const struct pmbus_limit_attr iout_limit_attrs[] = { |
| 1245 | { |
| 1246 | .reg = PMBUS_IOUT_OC_WARN_LIMIT, |
| 1247 | .attr = "max", |
| 1248 | .alarm = "max_alarm", |
| 1249 | .sbit = PB_IOUT_OC_WARNING, |
| 1250 | }, { |
| 1251 | .reg = PMBUS_IOUT_UC_FAULT_LIMIT, |
| 1252 | .attr = "lcrit", |
| 1253 | .alarm = "lcrit_alarm", |
| 1254 | .sbit = PB_IOUT_UC_FAULT, |
| 1255 | }, { |
| 1256 | .reg = PMBUS_IOUT_OC_FAULT_LIMIT, |
| 1257 | .attr = "crit", |
| 1258 | .alarm = "crit_alarm", |
| 1259 | .sbit = PB_IOUT_OC_FAULT, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1260 | }, { |
| 1261 | .reg = PMBUS_VIRT_READ_IOUT_AVG, |
| 1262 | .update = true, |
| 1263 | .attr = "average", |
| 1264 | }, { |
| 1265 | .reg = PMBUS_VIRT_READ_IOUT_MIN, |
| 1266 | .update = true, |
| 1267 | .attr = "lowest", |
| 1268 | }, { |
| 1269 | .reg = PMBUS_VIRT_READ_IOUT_MAX, |
| 1270 | .update = true, |
| 1271 | .attr = "highest", |
| 1272 | }, { |
| 1273 | .reg = PMBUS_VIRT_RESET_IOUT_HISTORY, |
| 1274 | .attr = "reset_history", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1275 | } |
| 1276 | }; |
| 1277 | |
| 1278 | static const struct pmbus_sensor_attr current_attributes[] = { |
| 1279 | { |
| 1280 | .reg = PMBUS_READ_IIN, |
| 1281 | .class = PSC_CURRENT_IN, |
| 1282 | .label = "iin", |
| 1283 | .func = PMBUS_HAVE_IIN, |
| 1284 | .sfunc = PMBUS_HAVE_STATUS_INPUT, |
| 1285 | .sbase = PB_STATUS_INPUT_BASE, |
| 1286 | .limit = iin_limit_attrs, |
| 1287 | .nlimit = ARRAY_SIZE(iin_limit_attrs), |
| 1288 | }, { |
| 1289 | .reg = PMBUS_READ_IOUT, |
| 1290 | .class = PSC_CURRENT_OUT, |
| 1291 | .label = "iout", |
| 1292 | .paged = true, |
| 1293 | .func = PMBUS_HAVE_IOUT, |
| 1294 | .sfunc = PMBUS_HAVE_STATUS_IOUT, |
| 1295 | .sbase = PB_STATUS_IOUT_BASE, |
| 1296 | .gbit = PB_STATUS_IOUT_OC, |
| 1297 | .limit = iout_limit_attrs, |
| 1298 | .nlimit = ARRAY_SIZE(iout_limit_attrs), |
| 1299 | } |
| 1300 | }; |
| 1301 | |
| 1302 | /* Power attributes */ |
| 1303 | |
| 1304 | static const struct pmbus_limit_attr pin_limit_attrs[] = { |
| 1305 | { |
| 1306 | .reg = PMBUS_PIN_OP_WARN_LIMIT, |
| 1307 | .attr = "max", |
| 1308 | .alarm = "alarm", |
| 1309 | .sbit = PB_PIN_OP_WARNING, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1310 | }, { |
| 1311 | .reg = PMBUS_VIRT_READ_PIN_AVG, |
| 1312 | .update = true, |
| 1313 | .attr = "average", |
| 1314 | }, { |
| 1315 | .reg = PMBUS_VIRT_READ_PIN_MAX, |
| 1316 | .update = true, |
| 1317 | .attr = "input_highest", |
| 1318 | }, { |
| 1319 | .reg = PMBUS_VIRT_RESET_PIN_HISTORY, |
| 1320 | .attr = "reset_history", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1321 | } |
| 1322 | }; |
| 1323 | |
| 1324 | static const struct pmbus_limit_attr pout_limit_attrs[] = { |
| 1325 | { |
| 1326 | .reg = PMBUS_POUT_MAX, |
| 1327 | .attr = "cap", |
| 1328 | .alarm = "cap_alarm", |
| 1329 | .sbit = PB_POWER_LIMITING, |
| 1330 | }, { |
| 1331 | .reg = PMBUS_POUT_OP_WARN_LIMIT, |
| 1332 | .attr = "max", |
| 1333 | .alarm = "max_alarm", |
| 1334 | .sbit = PB_POUT_OP_WARNING, |
| 1335 | }, { |
| 1336 | .reg = PMBUS_POUT_OP_FAULT_LIMIT, |
| 1337 | .attr = "crit", |
| 1338 | .alarm = "crit_alarm", |
| 1339 | .sbit = PB_POUT_OP_FAULT, |
Guenter Roeck | 60b873e | 2012-02-23 19:33:55 -0800 | [diff] [blame] | 1340 | }, { |
| 1341 | .reg = PMBUS_VIRT_READ_POUT_AVG, |
| 1342 | .update = true, |
| 1343 | .attr = "average", |
| 1344 | }, { |
| 1345 | .reg = PMBUS_VIRT_READ_POUT_MAX, |
| 1346 | .update = true, |
| 1347 | .attr = "input_highest", |
| 1348 | }, { |
| 1349 | .reg = PMBUS_VIRT_RESET_POUT_HISTORY, |
| 1350 | .attr = "reset_history", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1351 | } |
| 1352 | }; |
| 1353 | |
| 1354 | static const struct pmbus_sensor_attr power_attributes[] = { |
| 1355 | { |
| 1356 | .reg = PMBUS_READ_PIN, |
| 1357 | .class = PSC_POWER, |
| 1358 | .label = "pin", |
| 1359 | .func = PMBUS_HAVE_PIN, |
| 1360 | .sfunc = PMBUS_HAVE_STATUS_INPUT, |
| 1361 | .sbase = PB_STATUS_INPUT_BASE, |
| 1362 | .limit = pin_limit_attrs, |
| 1363 | .nlimit = ARRAY_SIZE(pin_limit_attrs), |
| 1364 | }, { |
| 1365 | .reg = PMBUS_READ_POUT, |
| 1366 | .class = PSC_POWER, |
| 1367 | .label = "pout", |
| 1368 | .paged = true, |
| 1369 | .func = PMBUS_HAVE_POUT, |
| 1370 | .sfunc = PMBUS_HAVE_STATUS_IOUT, |
| 1371 | .sbase = PB_STATUS_IOUT_BASE, |
| 1372 | .limit = pout_limit_attrs, |
| 1373 | .nlimit = ARRAY_SIZE(pout_limit_attrs), |
| 1374 | } |
| 1375 | }; |
| 1376 | |
| 1377 | /* Temperature atributes */ |
| 1378 | |
| 1379 | static const struct pmbus_limit_attr temp_limit_attrs[] = { |
| 1380 | { |
| 1381 | .reg = PMBUS_UT_WARN_LIMIT, |
Guenter Roeck | 40257b9 | 2011-09-10 06:02:12 -0700 | [diff] [blame] | 1382 | .low = true, |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1383 | .attr = "min", |
| 1384 | .alarm = "min_alarm", |
| 1385 | .sbit = PB_TEMP_UT_WARNING, |
| 1386 | }, { |
| 1387 | .reg = PMBUS_UT_FAULT_LIMIT, |
Guenter Roeck | 40257b9 | 2011-09-10 06:02:12 -0700 | [diff] [blame] | 1388 | .low = true, |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1389 | .attr = "lcrit", |
| 1390 | .alarm = "lcrit_alarm", |
| 1391 | .sbit = PB_TEMP_UT_FAULT, |
| 1392 | }, { |
| 1393 | .reg = PMBUS_OT_WARN_LIMIT, |
| 1394 | .attr = "max", |
| 1395 | .alarm = "max_alarm", |
| 1396 | .sbit = PB_TEMP_OT_WARNING, |
| 1397 | }, { |
| 1398 | .reg = PMBUS_OT_FAULT_LIMIT, |
| 1399 | .attr = "crit", |
| 1400 | .alarm = "crit_alarm", |
| 1401 | .sbit = PB_TEMP_OT_FAULT, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1402 | }, { |
| 1403 | .reg = PMBUS_VIRT_READ_TEMP_MIN, |
| 1404 | .attr = "lowest", |
| 1405 | }, { |
Guenter Roeck | 60b873e | 2012-02-23 19:33:55 -0800 | [diff] [blame] | 1406 | .reg = PMBUS_VIRT_READ_TEMP_AVG, |
| 1407 | .attr = "average", |
| 1408 | }, { |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1409 | .reg = PMBUS_VIRT_READ_TEMP_MAX, |
| 1410 | .attr = "highest", |
| 1411 | }, { |
| 1412 | .reg = PMBUS_VIRT_RESET_TEMP_HISTORY, |
| 1413 | .attr = "reset_history", |
| 1414 | } |
| 1415 | }; |
| 1416 | |
Guenter Roeck | 3d79028 | 2011-09-10 12:59:15 -0700 | [diff] [blame] | 1417 | static const struct pmbus_limit_attr temp_limit_attrs2[] = { |
| 1418 | { |
| 1419 | .reg = PMBUS_UT_WARN_LIMIT, |
| 1420 | .low = true, |
| 1421 | .attr = "min", |
| 1422 | .alarm = "min_alarm", |
| 1423 | .sbit = PB_TEMP_UT_WARNING, |
| 1424 | }, { |
| 1425 | .reg = PMBUS_UT_FAULT_LIMIT, |
| 1426 | .low = true, |
| 1427 | .attr = "lcrit", |
| 1428 | .alarm = "lcrit_alarm", |
| 1429 | .sbit = PB_TEMP_UT_FAULT, |
| 1430 | }, { |
| 1431 | .reg = PMBUS_OT_WARN_LIMIT, |
| 1432 | .attr = "max", |
| 1433 | .alarm = "max_alarm", |
| 1434 | .sbit = PB_TEMP_OT_WARNING, |
| 1435 | }, { |
| 1436 | .reg = PMBUS_OT_FAULT_LIMIT, |
| 1437 | .attr = "crit", |
| 1438 | .alarm = "crit_alarm", |
| 1439 | .sbit = PB_TEMP_OT_FAULT, |
| 1440 | }, { |
| 1441 | .reg = PMBUS_VIRT_READ_TEMP2_MIN, |
| 1442 | .attr = "lowest", |
| 1443 | }, { |
Guenter Roeck | 60b873e | 2012-02-23 19:33:55 -0800 | [diff] [blame] | 1444 | .reg = PMBUS_VIRT_READ_TEMP2_AVG, |
| 1445 | .attr = "average", |
| 1446 | }, { |
Guenter Roeck | 3d79028 | 2011-09-10 12:59:15 -0700 | [diff] [blame] | 1447 | .reg = PMBUS_VIRT_READ_TEMP2_MAX, |
| 1448 | .attr = "highest", |
| 1449 | }, { |
| 1450 | .reg = PMBUS_VIRT_RESET_TEMP2_HISTORY, |
| 1451 | .attr = "reset_history", |
| 1452 | } |
| 1453 | }; |
| 1454 | |
| 1455 | static const struct pmbus_limit_attr temp_limit_attrs3[] = { |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1456 | { |
| 1457 | .reg = PMBUS_UT_WARN_LIMIT, |
Guenter Roeck | 40257b9 | 2011-09-10 06:02:12 -0700 | [diff] [blame] | 1458 | .low = true, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1459 | .attr = "min", |
| 1460 | .alarm = "min_alarm", |
| 1461 | .sbit = PB_TEMP_UT_WARNING, |
| 1462 | }, { |
| 1463 | .reg = PMBUS_UT_FAULT_LIMIT, |
Guenter Roeck | 40257b9 | 2011-09-10 06:02:12 -0700 | [diff] [blame] | 1464 | .low = true, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1465 | .attr = "lcrit", |
| 1466 | .alarm = "lcrit_alarm", |
| 1467 | .sbit = PB_TEMP_UT_FAULT, |
| 1468 | }, { |
| 1469 | .reg = PMBUS_OT_WARN_LIMIT, |
| 1470 | .attr = "max", |
| 1471 | .alarm = "max_alarm", |
| 1472 | .sbit = PB_TEMP_OT_WARNING, |
| 1473 | }, { |
| 1474 | .reg = PMBUS_OT_FAULT_LIMIT, |
| 1475 | .attr = "crit", |
| 1476 | .alarm = "crit_alarm", |
| 1477 | .sbit = PB_TEMP_OT_FAULT, |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1478 | } |
| 1479 | }; |
| 1480 | |
| 1481 | static const struct pmbus_sensor_attr temp_attributes[] = { |
| 1482 | { |
| 1483 | .reg = PMBUS_READ_TEMPERATURE_1, |
| 1484 | .class = PSC_TEMPERATURE, |
| 1485 | .paged = true, |
| 1486 | .update = true, |
| 1487 | .compare = true, |
| 1488 | .func = PMBUS_HAVE_TEMP, |
| 1489 | .sfunc = PMBUS_HAVE_STATUS_TEMP, |
| 1490 | .sbase = PB_STATUS_TEMP_BASE, |
| 1491 | .gbit = PB_STATUS_TEMPERATURE, |
| 1492 | .limit = temp_limit_attrs, |
| 1493 | .nlimit = ARRAY_SIZE(temp_limit_attrs), |
| 1494 | }, { |
| 1495 | .reg = PMBUS_READ_TEMPERATURE_2, |
| 1496 | .class = PSC_TEMPERATURE, |
| 1497 | .paged = true, |
| 1498 | .update = true, |
| 1499 | .compare = true, |
| 1500 | .func = PMBUS_HAVE_TEMP2, |
| 1501 | .sfunc = PMBUS_HAVE_STATUS_TEMP, |
| 1502 | .sbase = PB_STATUS_TEMP_BASE, |
| 1503 | .gbit = PB_STATUS_TEMPERATURE, |
Guenter Roeck | 3d79028 | 2011-09-10 12:59:15 -0700 | [diff] [blame] | 1504 | .limit = temp_limit_attrs2, |
| 1505 | .nlimit = ARRAY_SIZE(temp_limit_attrs2), |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1506 | }, { |
| 1507 | .reg = PMBUS_READ_TEMPERATURE_3, |
| 1508 | .class = PSC_TEMPERATURE, |
| 1509 | .paged = true, |
| 1510 | .update = true, |
| 1511 | .compare = true, |
| 1512 | .func = PMBUS_HAVE_TEMP3, |
| 1513 | .sfunc = PMBUS_HAVE_STATUS_TEMP, |
| 1514 | .sbase = PB_STATUS_TEMP_BASE, |
| 1515 | .gbit = PB_STATUS_TEMPERATURE, |
Guenter Roeck | 3d79028 | 2011-09-10 12:59:15 -0700 | [diff] [blame] | 1516 | .limit = temp_limit_attrs3, |
| 1517 | .nlimit = ARRAY_SIZE(temp_limit_attrs3), |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1518 | } |
| 1519 | }; |
| 1520 | |
| 1521 | static const int pmbus_fan_registers[] = { |
| 1522 | PMBUS_READ_FAN_SPEED_1, |
| 1523 | PMBUS_READ_FAN_SPEED_2, |
| 1524 | PMBUS_READ_FAN_SPEED_3, |
| 1525 | PMBUS_READ_FAN_SPEED_4 |
| 1526 | }; |
| 1527 | |
| 1528 | static const int pmbus_fan_config_registers[] = { |
| 1529 | PMBUS_FAN_CONFIG_12, |
| 1530 | PMBUS_FAN_CONFIG_12, |
| 1531 | PMBUS_FAN_CONFIG_34, |
| 1532 | PMBUS_FAN_CONFIG_34 |
| 1533 | }; |
| 1534 | |
| 1535 | static const int pmbus_fan_status_registers[] = { |
| 1536 | PMBUS_STATUS_FAN_12, |
| 1537 | PMBUS_STATUS_FAN_12, |
| 1538 | PMBUS_STATUS_FAN_34, |
| 1539 | PMBUS_STATUS_FAN_34 |
| 1540 | }; |
| 1541 | |
| 1542 | static const u32 pmbus_fan_flags[] = { |
| 1543 | PMBUS_HAVE_FAN12, |
| 1544 | PMBUS_HAVE_FAN12, |
| 1545 | PMBUS_HAVE_FAN34, |
| 1546 | PMBUS_HAVE_FAN34 |
| 1547 | }; |
| 1548 | |
| 1549 | static const u32 pmbus_fan_status_flags[] = { |
| 1550 | PMBUS_HAVE_STATUS_FAN12, |
| 1551 | PMBUS_HAVE_STATUS_FAN12, |
| 1552 | PMBUS_HAVE_STATUS_FAN34, |
| 1553 | PMBUS_HAVE_STATUS_FAN34 |
| 1554 | }; |
| 1555 | |
| 1556 | /* Fans */ |
| 1557 | static void pmbus_add_fan_attributes(struct i2c_client *client, |
| 1558 | struct pmbus_data *data) |
| 1559 | { |
| 1560 | const struct pmbus_driver_info *info = data->info; |
| 1561 | int index = 1; |
| 1562 | int page; |
| 1563 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1564 | for (page = 0; page < info->pages; page++) { |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 1565 | int f; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1566 | |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 1567 | for (f = 0; f < ARRAY_SIZE(pmbus_fan_registers); f++) { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1568 | int regval; |
| 1569 | |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 1570 | if (!(info->func[page] & pmbus_fan_flags[f])) |
| 1571 | break; |
| 1572 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1573 | if (!pmbus_check_word_register(client, page, |
Guenter Roeck | 6586b14 | 2011-03-09 07:23:54 -0800 | [diff] [blame] | 1574 | pmbus_fan_registers[f])) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1575 | break; |
| 1576 | |
| 1577 | /* |
| 1578 | * Skip fan if not installed. |
| 1579 | * Each fan configuration register covers multiple fans, |
| 1580 | * so we have to do some magic. |
| 1581 | */ |
Guenter Roeck | 6586b14 | 2011-03-09 07:23:54 -0800 | [diff] [blame] | 1582 | regval = _pmbus_read_byte_data(client, page, |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1583 | pmbus_fan_config_registers[f]); |
| 1584 | if (regval < 0 || |
| 1585 | (!(regval & (PB_FAN_1_INSTALLED >> ((f & 1) * 4))))) |
| 1586 | continue; |
| 1587 | |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1588 | pmbus_add_sensor(data, "fan", "input", index, page, |
Guenter Roeck | 3506999 | 2011-03-21 21:31:00 -0700 | [diff] [blame] | 1589 | pmbus_fan_registers[f], PSC_FAN, true, |
| 1590 | true); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1591 | |
| 1592 | /* |
| 1593 | * Each fan status register covers multiple fans, |
| 1594 | * so we have to do some magic. |
| 1595 | */ |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 1596 | if ((info->func[page] & pmbus_fan_status_flags[f]) && |
| 1597 | pmbus_check_byte_register(client, |
| 1598 | page, pmbus_fan_status_registers[f])) { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1599 | int base; |
| 1600 | |
| 1601 | if (f > 1) /* fan 3, 4 */ |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 1602 | base = PB_STATUS_FAN34_BASE + page; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1603 | else |
| 1604 | base = PB_STATUS_FAN_BASE + page; |
| 1605 | pmbus_add_boolean_reg(data, "fan", "alarm", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1606 | index, base, |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1607 | PB_FAN_FAN1_WARNING >> (f & 1)); |
| 1608 | pmbus_add_boolean_reg(data, "fan", "fault", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1609 | index, base, |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1610 | PB_FAN_FAN1_FAULT >> (f & 1)); |
| 1611 | } |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1612 | index++; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1613 | } |
| 1614 | } |
| 1615 | } |
| 1616 | |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1617 | static void pmbus_find_attributes(struct i2c_client *client, |
| 1618 | struct pmbus_data *data) |
| 1619 | { |
| 1620 | /* Voltage sensors */ |
| 1621 | pmbus_add_sensor_attrs(client, data, "in", voltage_attributes, |
| 1622 | ARRAY_SIZE(voltage_attributes)); |
| 1623 | |
| 1624 | /* Current sensors */ |
| 1625 | pmbus_add_sensor_attrs(client, data, "curr", current_attributes, |
| 1626 | ARRAY_SIZE(current_attributes)); |
| 1627 | |
| 1628 | /* Power sensors */ |
| 1629 | pmbus_add_sensor_attrs(client, data, "power", power_attributes, |
| 1630 | ARRAY_SIZE(power_attributes)); |
| 1631 | |
| 1632 | /* Temperature sensors */ |
| 1633 | pmbus_add_sensor_attrs(client, data, "temp", temp_attributes, |
| 1634 | ARRAY_SIZE(temp_attributes)); |
| 1635 | |
| 1636 | /* Fans */ |
| 1637 | pmbus_add_fan_attributes(client, data); |
| 1638 | } |
| 1639 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1640 | /* |
| 1641 | * Identify chip parameters. |
| 1642 | * This function is called for all chips. |
| 1643 | */ |
| 1644 | static int pmbus_identify_common(struct i2c_client *client, |
| 1645 | struct pmbus_data *data) |
| 1646 | { |
Guenter Roeck | 1af1f53 | 2011-09-28 11:36:20 -0700 | [diff] [blame] | 1647 | int vout_mode = -1; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1648 | |
Guenter Roeck | 83274c6 | 2011-03-01 13:49:18 -0800 | [diff] [blame] | 1649 | if (pmbus_check_byte_register(client, 0, PMBUS_VOUT_MODE)) |
Guenter Roeck | da8e48a | 2011-07-29 22:19:39 -0700 | [diff] [blame] | 1650 | vout_mode = _pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE); |
Guenter Roeck | 83274c6 | 2011-03-01 13:49:18 -0800 | [diff] [blame] | 1651 | if (vout_mode >= 0 && vout_mode != 0xff) { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1652 | /* |
| 1653 | * Not all chips support the VOUT_MODE command, |
| 1654 | * so a failure to read it is not an error. |
| 1655 | */ |
| 1656 | switch (vout_mode >> 5) { |
| 1657 | case 0: /* linear mode */ |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 1658 | if (data->info->format[PSC_VOLTAGE_OUT] != linear) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1659 | return -ENODEV; |
| 1660 | |
Guenter Roeck | 1af1f53 | 2011-09-28 11:36:20 -0700 | [diff] [blame] | 1661 | data->exponent = ((s8)(vout_mode << 3)) >> 3; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1662 | break; |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 1663 | case 1: /* VID mode */ |
| 1664 | if (data->info->format[PSC_VOLTAGE_OUT] != vid) |
| 1665 | return -ENODEV; |
| 1666 | break; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1667 | case 2: /* direct mode */ |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 1668 | if (data->info->format[PSC_VOLTAGE_OUT] != direct) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1669 | return -ENODEV; |
| 1670 | break; |
| 1671 | default: |
| 1672 | return -ENODEV; |
| 1673 | } |
| 1674 | } |
| 1675 | |
| 1676 | /* Determine maximum number of sensors, booleans, and labels */ |
| 1677 | pmbus_find_max_attr(client, data); |
| 1678 | pmbus_clear_fault_page(client, 0); |
| 1679 | return 0; |
| 1680 | } |
| 1681 | |
| 1682 | int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id, |
| 1683 | struct pmbus_driver_info *info) |
| 1684 | { |
| 1685 | const struct pmbus_platform_data *pdata = client->dev.platform_data; |
| 1686 | struct pmbus_data *data; |
| 1687 | int ret; |
| 1688 | |
| 1689 | if (!info) { |
| 1690 | dev_err(&client->dev, "Missing chip information"); |
| 1691 | return -ENODEV; |
| 1692 | } |
| 1693 | |
| 1694 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WRITE_BYTE |
| 1695 | | I2C_FUNC_SMBUS_BYTE_DATA |
| 1696 | | I2C_FUNC_SMBUS_WORD_DATA)) |
| 1697 | return -ENODEV; |
| 1698 | |
Guenter Roeck | 8b313ca | 2012-02-22 08:56:43 -0800 | [diff] [blame] | 1699 | data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1700 | if (!data) { |
| 1701 | dev_err(&client->dev, "No memory to allocate driver data\n"); |
| 1702 | return -ENOMEM; |
| 1703 | } |
| 1704 | |
| 1705 | i2c_set_clientdata(client, data); |
| 1706 | mutex_init(&data->update_lock); |
| 1707 | |
Guenter Roeck | 7f2c066 | 2011-06-25 12:42:14 -0700 | [diff] [blame] | 1708 | /* Bail out if PMBus status register does not exist. */ |
| 1709 | if (i2c_smbus_read_byte_data(client, PMBUS_STATUS_BYTE) < 0) { |
| 1710 | dev_err(&client->dev, "PMBus status register not found\n"); |
Guenter Roeck | 8b313ca | 2012-02-22 08:56:43 -0800 | [diff] [blame] | 1711 | return -ENODEV; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1712 | } |
| 1713 | |
| 1714 | if (pdata) |
| 1715 | data->flags = pdata->flags; |
| 1716 | data->info = info; |
| 1717 | |
| 1718 | pmbus_clear_faults(client); |
| 1719 | |
| 1720 | if (info->identify) { |
| 1721 | ret = (*info->identify)(client, info); |
| 1722 | if (ret < 0) { |
| 1723 | dev_err(&client->dev, "Chip identification failed\n"); |
Guenter Roeck | 8b313ca | 2012-02-22 08:56:43 -0800 | [diff] [blame] | 1724 | return ret; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1725 | } |
| 1726 | } |
| 1727 | |
| 1728 | if (info->pages <= 0 || info->pages > PMBUS_PAGES) { |
| 1729 | dev_err(&client->dev, "Bad number of PMBus pages: %d\n", |
| 1730 | info->pages); |
Guenter Roeck | 8b313ca | 2012-02-22 08:56:43 -0800 | [diff] [blame] | 1731 | return -ENODEV; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1732 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1733 | |
| 1734 | ret = pmbus_identify_common(client, data); |
| 1735 | if (ret < 0) { |
| 1736 | dev_err(&client->dev, "Failed to identify chip capabilities\n"); |
Guenter Roeck | 8b313ca | 2012-02-22 08:56:43 -0800 | [diff] [blame] | 1737 | return ret; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1738 | } |
| 1739 | |
| 1740 | ret = -ENOMEM; |
Guenter Roeck | 8b313ca | 2012-02-22 08:56:43 -0800 | [diff] [blame] | 1741 | data->sensors = devm_kzalloc(&client->dev, sizeof(struct pmbus_sensor) |
| 1742 | * data->max_sensors, GFP_KERNEL); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1743 | if (!data->sensors) { |
| 1744 | dev_err(&client->dev, "No memory to allocate sensor data\n"); |
Guenter Roeck | 8b313ca | 2012-02-22 08:56:43 -0800 | [diff] [blame] | 1745 | return -ENOMEM; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1746 | } |
| 1747 | |
Guenter Roeck | 8b313ca | 2012-02-22 08:56:43 -0800 | [diff] [blame] | 1748 | data->booleans = devm_kzalloc(&client->dev, sizeof(struct pmbus_boolean) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1749 | * data->max_booleans, GFP_KERNEL); |
| 1750 | if (!data->booleans) { |
| 1751 | dev_err(&client->dev, "No memory to allocate boolean data\n"); |
Guenter Roeck | 8b313ca | 2012-02-22 08:56:43 -0800 | [diff] [blame] | 1752 | return -ENOMEM; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1753 | } |
| 1754 | |
Guenter Roeck | 8b313ca | 2012-02-22 08:56:43 -0800 | [diff] [blame] | 1755 | data->labels = devm_kzalloc(&client->dev, sizeof(struct pmbus_label) |
| 1756 | * data->max_labels, GFP_KERNEL); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1757 | if (!data->labels) { |
| 1758 | dev_err(&client->dev, "No memory to allocate label data\n"); |
Guenter Roeck | 8b313ca | 2012-02-22 08:56:43 -0800 | [diff] [blame] | 1759 | return -ENOMEM; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1760 | } |
| 1761 | |
Guenter Roeck | 8b313ca | 2012-02-22 08:56:43 -0800 | [diff] [blame] | 1762 | data->attributes = devm_kzalloc(&client->dev, sizeof(struct attribute *) |
| 1763 | * data->max_attributes, GFP_KERNEL); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1764 | if (!data->attributes) { |
| 1765 | dev_err(&client->dev, "No memory to allocate attribute data\n"); |
Guenter Roeck | 8b313ca | 2012-02-22 08:56:43 -0800 | [diff] [blame] | 1766 | return -ENOMEM; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1767 | } |
| 1768 | |
| 1769 | pmbus_find_attributes(client, data); |
| 1770 | |
| 1771 | /* |
| 1772 | * If there are no attributes, something is wrong. |
| 1773 | * Bail out instead of trying to register nothing. |
| 1774 | */ |
| 1775 | if (!data->num_attributes) { |
| 1776 | dev_err(&client->dev, "No attributes found\n"); |
Guenter Roeck | 8b313ca | 2012-02-22 08:56:43 -0800 | [diff] [blame] | 1777 | return -ENODEV; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1778 | } |
| 1779 | |
| 1780 | /* Register sysfs hooks */ |
| 1781 | data->group.attrs = data->attributes; |
| 1782 | ret = sysfs_create_group(&client->dev.kobj, &data->group); |
| 1783 | if (ret) { |
| 1784 | dev_err(&client->dev, "Failed to create sysfs entries\n"); |
Guenter Roeck | 8b313ca | 2012-02-22 08:56:43 -0800 | [diff] [blame] | 1785 | return ret; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1786 | } |
| 1787 | data->hwmon_dev = hwmon_device_register(&client->dev); |
| 1788 | if (IS_ERR(data->hwmon_dev)) { |
| 1789 | ret = PTR_ERR(data->hwmon_dev); |
| 1790 | dev_err(&client->dev, "Failed to register hwmon device\n"); |
| 1791 | goto out_hwmon_device_register; |
| 1792 | } |
| 1793 | return 0; |
| 1794 | |
| 1795 | out_hwmon_device_register: |
| 1796 | sysfs_remove_group(&client->dev.kobj, &data->group); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1797 | return ret; |
| 1798 | } |
| 1799 | EXPORT_SYMBOL_GPL(pmbus_do_probe); |
| 1800 | |
Guenter Roeck | dd285ad | 2012-02-22 08:56:44 -0800 | [diff] [blame] | 1801 | int pmbus_do_remove(struct i2c_client *client) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1802 | { |
| 1803 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 1804 | hwmon_device_unregister(data->hwmon_dev); |
| 1805 | sysfs_remove_group(&client->dev.kobj, &data->group); |
Guenter Roeck | dd285ad | 2012-02-22 08:56:44 -0800 | [diff] [blame] | 1806 | return 0; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1807 | } |
| 1808 | EXPORT_SYMBOL_GPL(pmbus_do_remove); |
| 1809 | |
| 1810 | MODULE_AUTHOR("Guenter Roeck"); |
| 1811 | MODULE_DESCRIPTION("PMBus core driver"); |
| 1812 | MODULE_LICENSE("GPL"); |