Guenter Roeck | 3434f37 | 2014-06-29 19:38:45 -0700 | [diff] [blame] | 1 | /* |
| 2 | * nct7802 - Driver for Nuvoton NCT7802Y |
| 3 | * |
| 4 | * Copyright (C) 2014 Guenter Roeck <linux@roeck-us.net> |
| 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 | |
| 17 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 18 | |
| 19 | #include <linux/err.h> |
| 20 | #include <linux/i2c.h> |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/hwmon.h> |
| 23 | #include <linux/hwmon-sysfs.h> |
| 24 | #include <linux/jiffies.h> |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/mutex.h> |
| 27 | #include <linux/regmap.h> |
| 28 | #include <linux/slab.h> |
| 29 | |
| 30 | #define DRVNAME "nct7802" |
| 31 | |
| 32 | static const u8 REG_VOLTAGE[5] = { 0x09, 0x0a, 0x0c, 0x0d, 0x0e }; |
| 33 | |
| 34 | static const u8 REG_VOLTAGE_LIMIT_LSB[2][5] = { |
| 35 | { 0x40, 0x00, 0x42, 0x44, 0x46 }, |
| 36 | { 0x3f, 0x00, 0x41, 0x43, 0x45 }, |
| 37 | }; |
| 38 | |
| 39 | static const u8 REG_VOLTAGE_LIMIT_MSB[5] = { 0x48, 0x00, 0x47, 0x47, 0x48 }; |
| 40 | |
| 41 | static const u8 REG_VOLTAGE_LIMIT_MSB_SHIFT[2][5] = { |
| 42 | { 0, 0, 4, 0, 4 }, |
| 43 | { 2, 0, 6, 2, 6 }, |
| 44 | }; |
| 45 | |
| 46 | #define REG_BANK 0x00 |
| 47 | #define REG_TEMP_LSB 0x05 |
| 48 | #define REG_TEMP_PECI_LSB 0x08 |
| 49 | #define REG_VOLTAGE_LOW 0x0f |
| 50 | #define REG_FANCOUNT_LOW 0x13 |
| 51 | #define REG_START 0x21 |
| 52 | #define REG_MODE 0x22 |
| 53 | #define REG_PECI_ENABLE 0x23 |
| 54 | #define REG_FAN_ENABLE 0x24 |
| 55 | #define REG_VMON_ENABLE 0x25 |
| 56 | #define REG_VENDOR_ID 0xfd |
| 57 | #define REG_CHIP_ID 0xfe |
| 58 | #define REG_VERSION_ID 0xff |
| 59 | |
| 60 | /* |
| 61 | * Data structures and manipulation thereof |
| 62 | */ |
| 63 | |
| 64 | struct nct7802_data { |
| 65 | struct regmap *regmap; |
| 66 | struct mutex access_lock; /* for multi-byte read and write operations */ |
| 67 | }; |
| 68 | |
| 69 | static int nct7802_read_temp(struct nct7802_data *data, |
| 70 | u8 reg_temp, u8 reg_temp_low, int *temp) |
| 71 | { |
| 72 | unsigned int t1, t2 = 0; |
| 73 | int err; |
| 74 | |
| 75 | *temp = 0; |
| 76 | |
| 77 | mutex_lock(&data->access_lock); |
| 78 | err = regmap_read(data->regmap, reg_temp, &t1); |
| 79 | if (err < 0) |
| 80 | goto abort; |
| 81 | t1 <<= 8; |
| 82 | if (reg_temp_low) { /* 11 bit data */ |
| 83 | err = regmap_read(data->regmap, reg_temp_low, &t2); |
| 84 | if (err < 0) |
| 85 | goto abort; |
| 86 | } |
| 87 | t1 |= t2 & 0xe0; |
| 88 | *temp = (s16)t1 / 32 * 125; |
| 89 | abort: |
| 90 | mutex_unlock(&data->access_lock); |
| 91 | return err; |
| 92 | } |
| 93 | |
| 94 | static int nct7802_read_fan(struct nct7802_data *data, u8 reg_fan) |
| 95 | { |
| 96 | unsigned int f1, f2; |
| 97 | int ret; |
| 98 | |
| 99 | mutex_lock(&data->access_lock); |
| 100 | ret = regmap_read(data->regmap, reg_fan, &f1); |
| 101 | if (ret < 0) |
| 102 | goto abort; |
| 103 | ret = regmap_read(data->regmap, REG_FANCOUNT_LOW, &f2); |
| 104 | if (ret < 0) |
| 105 | goto abort; |
| 106 | ret = (f1 << 5) | (f2 >> 3); |
| 107 | /* convert fan count to rpm */ |
| 108 | if (ret == 0x1fff) /* maximum value, assume fan is stopped */ |
| 109 | ret = 0; |
| 110 | else if (ret) |
| 111 | ret = DIV_ROUND_CLOSEST(1350000U, ret); |
| 112 | abort: |
| 113 | mutex_unlock(&data->access_lock); |
| 114 | return ret; |
| 115 | } |
| 116 | |
| 117 | static int nct7802_read_fan_min(struct nct7802_data *data, u8 reg_fan_low, |
| 118 | u8 reg_fan_high) |
| 119 | { |
| 120 | unsigned int f1, f2; |
| 121 | int ret; |
| 122 | |
| 123 | mutex_lock(&data->access_lock); |
| 124 | ret = regmap_read(data->regmap, reg_fan_low, &f1); |
| 125 | if (ret < 0) |
| 126 | goto abort; |
| 127 | ret = regmap_read(data->regmap, reg_fan_high, &f2); |
| 128 | if (ret < 0) |
| 129 | goto abort; |
| 130 | ret = f1 | ((f2 & 0xf8) << 5); |
| 131 | /* convert fan count to rpm */ |
| 132 | if (ret == 0x1fff) /* maximum value, assume no limit */ |
| 133 | ret = 0; |
| 134 | else if (ret) |
| 135 | ret = DIV_ROUND_CLOSEST(1350000U, ret); |
| 136 | abort: |
| 137 | mutex_unlock(&data->access_lock); |
| 138 | return ret; |
| 139 | } |
| 140 | |
| 141 | static int nct7802_write_fan_min(struct nct7802_data *data, u8 reg_fan_low, |
| 142 | u8 reg_fan_high, unsigned int limit) |
| 143 | { |
| 144 | int err; |
| 145 | |
| 146 | if (limit) |
| 147 | limit = DIV_ROUND_CLOSEST(1350000U, limit); |
| 148 | else |
| 149 | limit = 0x1fff; |
| 150 | limit = clamp_val(limit, 0, 0x1fff); |
| 151 | |
| 152 | mutex_lock(&data->access_lock); |
| 153 | err = regmap_write(data->regmap, reg_fan_low, limit & 0xff); |
| 154 | if (err < 0) |
| 155 | goto abort; |
| 156 | |
| 157 | err = regmap_write(data->regmap, reg_fan_high, (limit & 0x1f00) >> 5); |
| 158 | abort: |
| 159 | mutex_unlock(&data->access_lock); |
| 160 | return err; |
| 161 | } |
| 162 | |
| 163 | static u8 nct7802_vmul[] = { 4, 2, 2, 2, 2 }; |
| 164 | |
| 165 | static int nct7802_read_voltage(struct nct7802_data *data, int nr, int index) |
| 166 | { |
| 167 | unsigned int v1, v2; |
| 168 | int ret; |
| 169 | |
| 170 | mutex_lock(&data->access_lock); |
| 171 | if (index == 0) { /* voltage */ |
| 172 | ret = regmap_read(data->regmap, REG_VOLTAGE[nr], &v1); |
| 173 | if (ret < 0) |
| 174 | goto abort; |
| 175 | ret = regmap_read(data->regmap, REG_VOLTAGE_LOW, &v2); |
| 176 | if (ret < 0) |
| 177 | goto abort; |
| 178 | ret = ((v1 << 2) | (v2 >> 6)) * nct7802_vmul[nr]; |
| 179 | } else { /* limit */ |
| 180 | int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr]; |
| 181 | |
| 182 | ret = regmap_read(data->regmap, |
| 183 | REG_VOLTAGE_LIMIT_LSB[index - 1][nr], &v1); |
| 184 | if (ret < 0) |
| 185 | goto abort; |
| 186 | ret = regmap_read(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr], |
| 187 | &v2); |
| 188 | if (ret < 0) |
| 189 | goto abort; |
| 190 | ret = (v1 | ((v2 << shift) & 0x300)) * nct7802_vmul[nr]; |
| 191 | } |
| 192 | abort: |
| 193 | mutex_unlock(&data->access_lock); |
| 194 | return ret; |
| 195 | } |
| 196 | |
| 197 | static int nct7802_write_voltage(struct nct7802_data *data, int nr, int index, |
| 198 | unsigned int voltage) |
| 199 | { |
| 200 | int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr]; |
| 201 | int err; |
| 202 | |
| 203 | voltage = DIV_ROUND_CLOSEST(voltage, nct7802_vmul[nr]); |
| 204 | voltage = clamp_val(voltage, 0, 0x3ff); |
| 205 | |
| 206 | mutex_lock(&data->access_lock); |
| 207 | err = regmap_write(data->regmap, |
| 208 | REG_VOLTAGE_LIMIT_LSB[index - 1][nr], |
| 209 | voltage & 0xff); |
| 210 | if (err < 0) |
| 211 | goto abort; |
| 212 | |
| 213 | err = regmap_update_bits(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr], |
| 214 | 0x0300 >> shift, (voltage & 0x0300) >> shift); |
| 215 | abort: |
| 216 | mutex_unlock(&data->access_lock); |
| 217 | return err; |
| 218 | } |
| 219 | |
| 220 | static ssize_t show_in(struct device *dev, struct device_attribute *attr, |
| 221 | char *buf) |
| 222 | { |
| 223 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| 224 | struct nct7802_data *data = dev_get_drvdata(dev); |
| 225 | int voltage; |
| 226 | |
| 227 | voltage = nct7802_read_voltage(data, sattr->nr, sattr->index); |
| 228 | if (voltage < 0) |
| 229 | return voltage; |
| 230 | |
| 231 | return sprintf(buf, "%d\n", voltage); |
| 232 | } |
| 233 | |
| 234 | static ssize_t store_in(struct device *dev, struct device_attribute *attr, |
| 235 | const char *buf, size_t count) |
| 236 | { |
| 237 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| 238 | struct nct7802_data *data = dev_get_drvdata(dev); |
| 239 | int index = sattr->index; |
| 240 | int nr = sattr->nr; |
| 241 | unsigned long val; |
| 242 | int err; |
| 243 | |
| 244 | err = kstrtoul(buf, 10, &val); |
| 245 | if (err < 0) |
| 246 | return err; |
| 247 | |
| 248 | err = nct7802_write_voltage(data, nr, index, val); |
| 249 | return err ? : count; |
| 250 | } |
| 251 | |
| 252 | static ssize_t show_temp(struct device *dev, struct device_attribute *attr, |
| 253 | char *buf) |
| 254 | { |
| 255 | struct nct7802_data *data = dev_get_drvdata(dev); |
| 256 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| 257 | int err, temp; |
| 258 | |
| 259 | err = nct7802_read_temp(data, sattr->nr, sattr->index, &temp); |
| 260 | if (err < 0) |
| 261 | return err; |
| 262 | |
| 263 | return sprintf(buf, "%d\n", temp); |
| 264 | } |
| 265 | |
| 266 | static ssize_t store_temp(struct device *dev, struct device_attribute *attr, |
| 267 | const char *buf, size_t count) |
| 268 | { |
| 269 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| 270 | struct nct7802_data *data = dev_get_drvdata(dev); |
| 271 | int nr = sattr->nr; |
| 272 | long val; |
| 273 | int err; |
| 274 | |
| 275 | err = kstrtol(buf, 10, &val); |
| 276 | if (err < 0) |
| 277 | return err; |
| 278 | |
| 279 | val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), -128, 127); |
| 280 | |
| 281 | err = regmap_write(data->regmap, nr, val & 0xff); |
| 282 | return err ? : count; |
| 283 | } |
| 284 | |
| 285 | static ssize_t show_fan(struct device *dev, struct device_attribute *attr, |
| 286 | char *buf) |
| 287 | { |
| 288 | struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); |
| 289 | struct nct7802_data *data = dev_get_drvdata(dev); |
| 290 | int speed; |
| 291 | |
| 292 | speed = nct7802_read_fan(data, sattr->index); |
| 293 | if (speed < 0) |
| 294 | return speed; |
| 295 | |
| 296 | return sprintf(buf, "%d\n", speed); |
| 297 | } |
| 298 | |
| 299 | static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, |
| 300 | char *buf) |
| 301 | { |
| 302 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| 303 | struct nct7802_data *data = dev_get_drvdata(dev); |
| 304 | int speed; |
| 305 | |
| 306 | speed = nct7802_read_fan_min(data, sattr->nr, sattr->index); |
| 307 | if (speed < 0) |
| 308 | return speed; |
| 309 | |
| 310 | return sprintf(buf, "%d\n", speed); |
| 311 | } |
| 312 | |
| 313 | static ssize_t store_fan_min(struct device *dev, struct device_attribute *attr, |
| 314 | const char *buf, size_t count) |
| 315 | { |
| 316 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| 317 | struct nct7802_data *data = dev_get_drvdata(dev); |
| 318 | unsigned long val; |
| 319 | int err; |
| 320 | |
| 321 | err = kstrtoul(buf, 10, &val); |
| 322 | if (err < 0) |
| 323 | return err; |
| 324 | |
| 325 | err = nct7802_write_fan_min(data, sattr->nr, sattr->index, val); |
| 326 | return err ? : count; |
| 327 | } |
| 328 | |
| 329 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, |
| 330 | char *buf) |
| 331 | { |
| 332 | struct nct7802_data *data = dev_get_drvdata(dev); |
| 333 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| 334 | int bit = sattr->index; |
| 335 | unsigned int val; |
| 336 | int ret; |
| 337 | |
| 338 | ret = regmap_read(data->regmap, sattr->nr, &val); |
| 339 | if (ret < 0) |
| 340 | return ret; |
| 341 | |
| 342 | return sprintf(buf, "%u\n", !!(val & (1 << bit))); |
| 343 | } |
| 344 | |
| 345 | static ssize_t |
| 346 | show_beep(struct device *dev, struct device_attribute *attr, char *buf) |
| 347 | { |
| 348 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| 349 | struct nct7802_data *data = dev_get_drvdata(dev); |
| 350 | unsigned int regval; |
| 351 | int err; |
| 352 | |
| 353 | err = regmap_read(data->regmap, sattr->nr, ®val); |
| 354 | if (err) |
| 355 | return err; |
| 356 | |
| 357 | return sprintf(buf, "%u\n", !!(regval & (1 << sattr->index))); |
| 358 | } |
| 359 | |
| 360 | static ssize_t |
| 361 | store_beep(struct device *dev, struct device_attribute *attr, const char *buf, |
| 362 | size_t count) |
| 363 | { |
| 364 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| 365 | struct nct7802_data *data = dev_get_drvdata(dev); |
| 366 | unsigned long val; |
| 367 | int err; |
| 368 | |
| 369 | err = kstrtoul(buf, 10, &val); |
| 370 | if (err < 0) |
| 371 | return err; |
| 372 | if (val > 1) |
| 373 | return -EINVAL; |
| 374 | |
| 375 | err = regmap_update_bits(data->regmap, sattr->nr, 1 << sattr->index, |
| 376 | val ? 1 << sattr->index : 0); |
| 377 | return err ? : count; |
| 378 | } |
| 379 | |
| 380 | static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0x01, |
| 381 | REG_TEMP_LSB); |
| 382 | static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, |
| 383 | store_temp, 0x31, 0); |
| 384 | static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, |
| 385 | store_temp, 0x30, 0); |
| 386 | static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp, |
| 387 | store_temp, 0x3a, 0); |
| 388 | |
| 389 | static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0x02, |
| 390 | REG_TEMP_LSB); |
| 391 | static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, |
| 392 | store_temp, 0x33, 0); |
| 393 | static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, |
| 394 | store_temp, 0x32, 0); |
| 395 | static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp, |
| 396 | store_temp, 0x3b, 0); |
| 397 | |
| 398 | static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 0x03, |
| 399 | REG_TEMP_LSB); |
| 400 | static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, |
| 401 | store_temp, 0x35, 0); |
| 402 | static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, |
| 403 | store_temp, 0x34, 0); |
| 404 | static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp, |
| 405 | store_temp, 0x3c, 0); |
| 406 | |
| 407 | static SENSOR_DEVICE_ATTR_2(temp4_input, S_IRUGO, show_temp, NULL, 0x04, 0); |
| 408 | static SENSOR_DEVICE_ATTR_2(temp4_min, S_IRUGO | S_IWUSR, show_temp, |
| 409 | store_temp, 0x37, 0); |
| 410 | static SENSOR_DEVICE_ATTR_2(temp4_max, S_IRUGO | S_IWUSR, show_temp, |
| 411 | store_temp, 0x36, 0); |
| 412 | static SENSOR_DEVICE_ATTR_2(temp4_crit, S_IRUGO | S_IWUSR, show_temp, |
| 413 | store_temp, 0x3d, 0); |
| 414 | |
| 415 | static SENSOR_DEVICE_ATTR_2(temp5_input, S_IRUGO, show_temp, NULL, 0x06, |
| 416 | REG_TEMP_PECI_LSB); |
| 417 | static SENSOR_DEVICE_ATTR_2(temp5_min, S_IRUGO | S_IWUSR, show_temp, |
| 418 | store_temp, 0x39, 0); |
| 419 | static SENSOR_DEVICE_ATTR_2(temp5_max, S_IRUGO | S_IWUSR, show_temp, |
| 420 | store_temp, 0x38, 0); |
| 421 | static SENSOR_DEVICE_ATTR_2(temp5_crit, S_IRUGO | S_IWUSR, show_temp, |
| 422 | store_temp, 0x3e, 0); |
| 423 | |
| 424 | static SENSOR_DEVICE_ATTR_2(temp6_input, S_IRUGO, show_temp, NULL, 0x07, |
| 425 | REG_TEMP_PECI_LSB); |
| 426 | |
| 427 | static SENSOR_DEVICE_ATTR_2(temp1_min_alarm, S_IRUGO, show_alarm, NULL, |
| 428 | 0x18, 0); |
| 429 | static SENSOR_DEVICE_ATTR_2(temp2_min_alarm, S_IRUGO, show_alarm, NULL, |
| 430 | 0x18, 1); |
| 431 | static SENSOR_DEVICE_ATTR_2(temp3_min_alarm, S_IRUGO, show_alarm, NULL, |
| 432 | 0x18, 2); |
| 433 | static SENSOR_DEVICE_ATTR_2(temp4_min_alarm, S_IRUGO, show_alarm, NULL, |
| 434 | 0x18, 3); |
| 435 | static SENSOR_DEVICE_ATTR_2(temp5_min_alarm, S_IRUGO, show_alarm, NULL, |
| 436 | 0x18, 4); |
| 437 | |
| 438 | static SENSOR_DEVICE_ATTR_2(temp1_max_alarm, S_IRUGO, show_alarm, NULL, |
| 439 | 0x19, 0); |
| 440 | static SENSOR_DEVICE_ATTR_2(temp2_max_alarm, S_IRUGO, show_alarm, NULL, |
| 441 | 0x19, 1); |
| 442 | static SENSOR_DEVICE_ATTR_2(temp3_max_alarm, S_IRUGO, show_alarm, NULL, |
| 443 | 0x19, 2); |
| 444 | static SENSOR_DEVICE_ATTR_2(temp4_max_alarm, S_IRUGO, show_alarm, NULL, |
| 445 | 0x19, 3); |
| 446 | static SENSOR_DEVICE_ATTR_2(temp5_max_alarm, S_IRUGO, show_alarm, NULL, |
| 447 | 0x19, 4); |
| 448 | |
| 449 | static SENSOR_DEVICE_ATTR_2(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, |
| 450 | 0x1b, 0); |
| 451 | static SENSOR_DEVICE_ATTR_2(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, |
| 452 | 0x1b, 1); |
| 453 | static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, |
| 454 | 0x1b, 2); |
| 455 | static SENSOR_DEVICE_ATTR_2(temp4_crit_alarm, S_IRUGO, show_alarm, NULL, |
| 456 | 0x1b, 3); |
| 457 | static SENSOR_DEVICE_ATTR_2(temp5_crit_alarm, S_IRUGO, show_alarm, NULL, |
| 458 | 0x1b, 4); |
| 459 | |
| 460 | static SENSOR_DEVICE_ATTR_2(temp1_fault, S_IRUGO, show_alarm, NULL, 0x17, 0); |
| 461 | static SENSOR_DEVICE_ATTR_2(temp2_fault, S_IRUGO, show_alarm, NULL, 0x17, 1); |
| 462 | static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_alarm, NULL, 0x17, 2); |
| 463 | |
| 464 | static SENSOR_DEVICE_ATTR_2(temp1_beep, S_IRUGO | S_IWUSR, show_beep, |
| 465 | store_beep, 0x5c, 0); |
| 466 | static SENSOR_DEVICE_ATTR_2(temp2_beep, S_IRUGO | S_IWUSR, show_beep, |
| 467 | store_beep, 0x5c, 1); |
| 468 | static SENSOR_DEVICE_ATTR_2(temp3_beep, S_IRUGO | S_IWUSR, show_beep, |
| 469 | store_beep, 0x5c, 2); |
| 470 | static SENSOR_DEVICE_ATTR_2(temp4_beep, S_IRUGO | S_IWUSR, show_beep, |
| 471 | store_beep, 0x5c, 3); |
| 472 | static SENSOR_DEVICE_ATTR_2(temp5_beep, S_IRUGO | S_IWUSR, show_beep, |
| 473 | store_beep, 0x5c, 4); |
| 474 | static SENSOR_DEVICE_ATTR_2(temp6_beep, S_IRUGO | S_IWUSR, show_beep, |
| 475 | store_beep, 0x5c, 5); |
| 476 | |
| 477 | static struct attribute *nct7802_temp_attrs[] = { |
| 478 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
| 479 | &sensor_dev_attr_temp1_min.dev_attr.attr, |
| 480 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
| 481 | &sensor_dev_attr_temp1_crit.dev_attr.attr, |
| 482 | &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, |
| 483 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, |
| 484 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, |
| 485 | &sensor_dev_attr_temp1_fault.dev_attr.attr, |
| 486 | &sensor_dev_attr_temp1_beep.dev_attr.attr, |
| 487 | |
| 488 | &sensor_dev_attr_temp2_input.dev_attr.attr, /* 9 */ |
| 489 | &sensor_dev_attr_temp2_min.dev_attr.attr, |
| 490 | &sensor_dev_attr_temp2_max.dev_attr.attr, |
| 491 | &sensor_dev_attr_temp2_crit.dev_attr.attr, |
| 492 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, |
| 493 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, |
| 494 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, |
| 495 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
| 496 | &sensor_dev_attr_temp2_beep.dev_attr.attr, |
| 497 | |
| 498 | &sensor_dev_attr_temp3_input.dev_attr.attr, /* 18 */ |
| 499 | &sensor_dev_attr_temp3_min.dev_attr.attr, |
| 500 | &sensor_dev_attr_temp3_max.dev_attr.attr, |
| 501 | &sensor_dev_attr_temp3_crit.dev_attr.attr, |
| 502 | &sensor_dev_attr_temp3_min_alarm.dev_attr.attr, |
| 503 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, |
| 504 | &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, |
| 505 | &sensor_dev_attr_temp3_fault.dev_attr.attr, |
| 506 | &sensor_dev_attr_temp3_beep.dev_attr.attr, |
| 507 | |
| 508 | &sensor_dev_attr_temp4_input.dev_attr.attr, /* 27 */ |
| 509 | &sensor_dev_attr_temp4_min.dev_attr.attr, |
| 510 | &sensor_dev_attr_temp4_max.dev_attr.attr, |
| 511 | &sensor_dev_attr_temp4_crit.dev_attr.attr, |
| 512 | &sensor_dev_attr_temp4_min_alarm.dev_attr.attr, |
| 513 | &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, |
| 514 | &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, |
| 515 | &sensor_dev_attr_temp4_beep.dev_attr.attr, |
| 516 | |
| 517 | &sensor_dev_attr_temp5_input.dev_attr.attr, /* 35 */ |
| 518 | &sensor_dev_attr_temp5_min.dev_attr.attr, |
| 519 | &sensor_dev_attr_temp5_max.dev_attr.attr, |
| 520 | &sensor_dev_attr_temp5_crit.dev_attr.attr, |
| 521 | &sensor_dev_attr_temp5_min_alarm.dev_attr.attr, |
| 522 | &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, |
| 523 | &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr, |
| 524 | &sensor_dev_attr_temp5_beep.dev_attr.attr, |
| 525 | |
| 526 | &sensor_dev_attr_temp6_input.dev_attr.attr, /* 43 */ |
| 527 | &sensor_dev_attr_temp6_beep.dev_attr.attr, |
| 528 | |
| 529 | NULL |
| 530 | }; |
| 531 | |
| 532 | static umode_t nct7802_temp_is_visible(struct kobject *kobj, |
| 533 | struct attribute *attr, int index) |
| 534 | { |
| 535 | struct device *dev = container_of(kobj, struct device, kobj); |
| 536 | struct nct7802_data *data = dev_get_drvdata(dev); |
| 537 | unsigned int reg; |
| 538 | int err; |
| 539 | |
| 540 | err = regmap_read(data->regmap, REG_MODE, ®); |
| 541 | if (err < 0) |
| 542 | return 0; |
| 543 | |
| 544 | if (index < 9 && |
| 545 | (reg & 03) != 0x01 && (reg & 0x03) != 0x02) /* RD1 */ |
| 546 | return 0; |
| 547 | if (index >= 9 && index < 18 && |
| 548 | (reg & 0x0c) != 0x04 && (reg & 0x0c) != 0x08) /* RD2 */ |
| 549 | return 0; |
Constantine Shulyupin | 56172d8 | 2015-06-26 17:47:44 +0300 | [diff] [blame] | 550 | if (index >= 18 && index < 27 && (reg & 0x30) != 0x20) /* RD3 */ |
Guenter Roeck | 3434f37 | 2014-06-29 19:38:45 -0700 | [diff] [blame] | 551 | return 0; |
| 552 | if (index >= 27 && index < 35) /* local */ |
| 553 | return attr->mode; |
| 554 | |
| 555 | err = regmap_read(data->regmap, REG_PECI_ENABLE, ®); |
| 556 | if (err < 0) |
| 557 | return 0; |
| 558 | |
| 559 | if (index >= 35 && index < 43 && !(reg & 0x01)) /* PECI 0 */ |
| 560 | return 0; |
| 561 | |
| 562 | if (index >= 0x43 && (!(reg & 0x02))) /* PECI 1 */ |
| 563 | return 0; |
| 564 | |
| 565 | return attr->mode; |
| 566 | } |
| 567 | |
| 568 | static struct attribute_group nct7802_temp_group = { |
| 569 | .attrs = nct7802_temp_attrs, |
| 570 | .is_visible = nct7802_temp_is_visible, |
| 571 | }; |
| 572 | |
| 573 | static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0); |
| 574 | static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, store_in, |
| 575 | 0, 1); |
| 576 | static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, store_in, |
| 577 | 0, 2); |
| 578 | static SENSOR_DEVICE_ATTR_2(in0_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 3); |
| 579 | static SENSOR_DEVICE_ATTR_2(in0_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, |
| 580 | 0x5a, 3); |
| 581 | |
| 582 | static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0); |
| 583 | |
| 584 | static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0); |
| 585 | static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, store_in, |
| 586 | 2, 1); |
| 587 | static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, store_in, |
| 588 | 2, 2); |
| 589 | static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 0); |
| 590 | static SENSOR_DEVICE_ATTR_2(in2_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, |
| 591 | 0x5a, 0); |
| 592 | |
| 593 | static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0); |
| 594 | static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, store_in, |
| 595 | 3, 1); |
| 596 | static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, store_in, |
| 597 | 3, 2); |
| 598 | static SENSOR_DEVICE_ATTR_2(in3_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 1); |
| 599 | static SENSOR_DEVICE_ATTR_2(in3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, |
| 600 | 0x5a, 1); |
| 601 | |
| 602 | static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0); |
| 603 | static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, store_in, |
| 604 | 4, 1); |
| 605 | static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, store_in, |
| 606 | 4, 2); |
| 607 | static SENSOR_DEVICE_ATTR_2(in4_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 2); |
| 608 | static SENSOR_DEVICE_ATTR_2(in4_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, |
| 609 | 0x5a, 2); |
| 610 | |
| 611 | static struct attribute *nct7802_in_attrs[] = { |
| 612 | &sensor_dev_attr_in0_input.dev_attr.attr, |
| 613 | &sensor_dev_attr_in0_min.dev_attr.attr, |
| 614 | &sensor_dev_attr_in0_max.dev_attr.attr, |
| 615 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
| 616 | &sensor_dev_attr_in0_beep.dev_attr.attr, |
| 617 | |
| 618 | &sensor_dev_attr_in1_input.dev_attr.attr, /* 5 */ |
| 619 | |
| 620 | &sensor_dev_attr_in2_input.dev_attr.attr, /* 6 */ |
| 621 | &sensor_dev_attr_in2_min.dev_attr.attr, |
| 622 | &sensor_dev_attr_in2_max.dev_attr.attr, |
| 623 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
| 624 | &sensor_dev_attr_in2_beep.dev_attr.attr, |
| 625 | |
| 626 | &sensor_dev_attr_in3_input.dev_attr.attr, /* 11 */ |
| 627 | &sensor_dev_attr_in3_min.dev_attr.attr, |
| 628 | &sensor_dev_attr_in3_max.dev_attr.attr, |
| 629 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
| 630 | &sensor_dev_attr_in3_beep.dev_attr.attr, |
| 631 | |
| 632 | &sensor_dev_attr_in4_input.dev_attr.attr, /* 17 */ |
| 633 | &sensor_dev_attr_in4_min.dev_attr.attr, |
| 634 | &sensor_dev_attr_in4_max.dev_attr.attr, |
| 635 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
| 636 | &sensor_dev_attr_in4_beep.dev_attr.attr, |
| 637 | |
| 638 | NULL, |
| 639 | }; |
| 640 | |
| 641 | static umode_t nct7802_in_is_visible(struct kobject *kobj, |
| 642 | struct attribute *attr, int index) |
| 643 | { |
| 644 | struct device *dev = container_of(kobj, struct device, kobj); |
| 645 | struct nct7802_data *data = dev_get_drvdata(dev); |
| 646 | unsigned int reg; |
| 647 | int err; |
| 648 | |
| 649 | if (index < 6) /* VCC, VCORE */ |
| 650 | return attr->mode; |
| 651 | |
| 652 | err = regmap_read(data->regmap, REG_MODE, ®); |
| 653 | if (err < 0) |
| 654 | return 0; |
| 655 | |
| 656 | if (index >= 6 && index < 11 && (reg & 0x03) != 0x03) /* VSEN1 */ |
| 657 | return 0; |
| 658 | if (index >= 11 && index < 17 && (reg & 0x0c) != 0x0c) /* VSEN2 */ |
| 659 | return 0; |
| 660 | if (index >= 17 && (reg & 0x30) != 0x30) /* VSEN3 */ |
| 661 | return 0; |
| 662 | |
| 663 | return attr->mode; |
| 664 | } |
| 665 | |
| 666 | static struct attribute_group nct7802_in_group = { |
| 667 | .attrs = nct7802_in_attrs, |
| 668 | .is_visible = nct7802_in_is_visible, |
| 669 | }; |
| 670 | |
| 671 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0x10); |
| 672 | static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan_min, |
| 673 | store_fan_min, 0x49, 0x4c); |
| 674 | static SENSOR_DEVICE_ATTR_2(fan1_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 0); |
| 675 | static SENSOR_DEVICE_ATTR_2(fan1_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, |
| 676 | 0x5b, 0); |
| 677 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 0x11); |
| 678 | static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan_min, |
| 679 | store_fan_min, 0x4a, 0x4d); |
| 680 | static SENSOR_DEVICE_ATTR_2(fan2_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 1); |
| 681 | static SENSOR_DEVICE_ATTR_2(fan2_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, |
| 682 | 0x5b, 1); |
| 683 | static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 0x12); |
| 684 | static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan_min, |
| 685 | store_fan_min, 0x4b, 0x4e); |
| 686 | static SENSOR_DEVICE_ATTR_2(fan3_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 2); |
| 687 | static SENSOR_DEVICE_ATTR_2(fan3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, |
| 688 | 0x5b, 2); |
| 689 | |
| 690 | static struct attribute *nct7802_fan_attrs[] = { |
| 691 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
| 692 | &sensor_dev_attr_fan1_min.dev_attr.attr, |
| 693 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
| 694 | &sensor_dev_attr_fan1_beep.dev_attr.attr, |
| 695 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
| 696 | &sensor_dev_attr_fan2_min.dev_attr.attr, |
| 697 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
| 698 | &sensor_dev_attr_fan2_beep.dev_attr.attr, |
| 699 | &sensor_dev_attr_fan3_input.dev_attr.attr, |
| 700 | &sensor_dev_attr_fan3_min.dev_attr.attr, |
| 701 | &sensor_dev_attr_fan3_alarm.dev_attr.attr, |
| 702 | &sensor_dev_attr_fan3_beep.dev_attr.attr, |
| 703 | |
| 704 | NULL |
| 705 | }; |
| 706 | |
| 707 | static umode_t nct7802_fan_is_visible(struct kobject *kobj, |
| 708 | struct attribute *attr, int index) |
| 709 | { |
| 710 | struct device *dev = container_of(kobj, struct device, kobj); |
| 711 | struct nct7802_data *data = dev_get_drvdata(dev); |
| 712 | int fan = index / 4; /* 4 attributes per fan */ |
| 713 | unsigned int reg; |
| 714 | int err; |
| 715 | |
| 716 | err = regmap_read(data->regmap, REG_FAN_ENABLE, ®); |
| 717 | if (err < 0 || !(reg & (1 << fan))) |
| 718 | return 0; |
| 719 | |
| 720 | return attr->mode; |
| 721 | } |
| 722 | |
| 723 | static struct attribute_group nct7802_fan_group = { |
| 724 | .attrs = nct7802_fan_attrs, |
| 725 | .is_visible = nct7802_fan_is_visible, |
| 726 | }; |
| 727 | |
| 728 | static const struct attribute_group *nct7802_groups[] = { |
| 729 | &nct7802_temp_group, |
| 730 | &nct7802_in_group, |
| 731 | &nct7802_fan_group, |
| 732 | NULL |
| 733 | }; |
| 734 | |
| 735 | static int nct7802_detect(struct i2c_client *client, |
| 736 | struct i2c_board_info *info) |
| 737 | { |
| 738 | int reg; |
| 739 | |
| 740 | /* |
| 741 | * Chip identification registers are only available in bank 0, |
| 742 | * so only attempt chip detection if bank 0 is selected |
| 743 | */ |
| 744 | reg = i2c_smbus_read_byte_data(client, REG_BANK); |
| 745 | if (reg != 0x00) |
| 746 | return -ENODEV; |
| 747 | |
| 748 | reg = i2c_smbus_read_byte_data(client, REG_VENDOR_ID); |
| 749 | if (reg != 0x50) |
| 750 | return -ENODEV; |
| 751 | |
| 752 | reg = i2c_smbus_read_byte_data(client, REG_CHIP_ID); |
| 753 | if (reg != 0xc3) |
| 754 | return -ENODEV; |
| 755 | |
| 756 | reg = i2c_smbus_read_byte_data(client, REG_VERSION_ID); |
| 757 | if (reg < 0 || (reg & 0xf0) != 0x20) |
| 758 | return -ENODEV; |
| 759 | |
| 760 | /* Also validate lower bits of voltage and temperature registers */ |
| 761 | reg = i2c_smbus_read_byte_data(client, REG_TEMP_LSB); |
| 762 | if (reg < 0 || (reg & 0x1f)) |
| 763 | return -ENODEV; |
| 764 | |
| 765 | reg = i2c_smbus_read_byte_data(client, REG_TEMP_PECI_LSB); |
| 766 | if (reg < 0 || (reg & 0x3f)) |
| 767 | return -ENODEV; |
| 768 | |
| 769 | reg = i2c_smbus_read_byte_data(client, REG_VOLTAGE_LOW); |
| 770 | if (reg < 0 || (reg & 0x3f)) |
| 771 | return -ENODEV; |
| 772 | |
| 773 | strlcpy(info->type, "nct7802", I2C_NAME_SIZE); |
| 774 | return 0; |
| 775 | } |
| 776 | |
| 777 | static bool nct7802_regmap_is_volatile(struct device *dev, unsigned int reg) |
| 778 | { |
| 779 | return reg != REG_BANK && reg <= 0x20; |
| 780 | } |
| 781 | |
Krzysztof Kozlowski | 3c535bc | 2015-01-05 09:57:55 +0100 | [diff] [blame] | 782 | static const struct regmap_config nct7802_regmap_config = { |
Guenter Roeck | 3434f37 | 2014-06-29 19:38:45 -0700 | [diff] [blame] | 783 | .reg_bits = 8, |
| 784 | .val_bits = 8, |
| 785 | .cache_type = REGCACHE_RBTREE, |
| 786 | .volatile_reg = nct7802_regmap_is_volatile, |
| 787 | }; |
| 788 | |
| 789 | static int nct7802_init_chip(struct nct7802_data *data) |
| 790 | { |
| 791 | int err; |
| 792 | |
| 793 | /* Enable ADC */ |
| 794 | err = regmap_update_bits(data->regmap, REG_START, 0x01, 0x01); |
| 795 | if (err) |
| 796 | return err; |
| 797 | |
| 798 | /* Enable local temperature sensor */ |
| 799 | err = regmap_update_bits(data->regmap, REG_MODE, 0x40, 0x40); |
| 800 | if (err) |
| 801 | return err; |
| 802 | |
| 803 | /* Enable Vcore and VCC voltage monitoring */ |
| 804 | return regmap_update_bits(data->regmap, REG_VMON_ENABLE, 0x03, 0x03); |
| 805 | } |
| 806 | |
| 807 | static int nct7802_probe(struct i2c_client *client, |
| 808 | const struct i2c_device_id *id) |
| 809 | { |
| 810 | struct device *dev = &client->dev; |
| 811 | struct nct7802_data *data; |
| 812 | struct device *hwmon_dev; |
| 813 | int ret; |
| 814 | |
| 815 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
| 816 | if (data == NULL) |
| 817 | return -ENOMEM; |
| 818 | |
| 819 | data->regmap = devm_regmap_init_i2c(client, &nct7802_regmap_config); |
| 820 | if (IS_ERR(data->regmap)) |
| 821 | return PTR_ERR(data->regmap); |
| 822 | |
| 823 | mutex_init(&data->access_lock); |
| 824 | |
| 825 | ret = nct7802_init_chip(data); |
| 826 | if (ret < 0) |
| 827 | return ret; |
| 828 | |
| 829 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
| 830 | data, |
| 831 | nct7802_groups); |
| 832 | return PTR_ERR_OR_ZERO(hwmon_dev); |
| 833 | } |
| 834 | |
| 835 | static const unsigned short nct7802_address_list[] = { |
| 836 | 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END |
| 837 | }; |
| 838 | |
| 839 | static const struct i2c_device_id nct7802_idtable[] = { |
| 840 | { "nct7802", 0 }, |
| 841 | { } |
| 842 | }; |
| 843 | MODULE_DEVICE_TABLE(i2c, nct7802_idtable); |
| 844 | |
| 845 | static struct i2c_driver nct7802_driver = { |
| 846 | .class = I2C_CLASS_HWMON, |
| 847 | .driver = { |
| 848 | .name = DRVNAME, |
| 849 | }, |
| 850 | .detect = nct7802_detect, |
| 851 | .probe = nct7802_probe, |
| 852 | .id_table = nct7802_idtable, |
| 853 | .address_list = nct7802_address_list, |
| 854 | }; |
| 855 | |
| 856 | module_i2c_driver(nct7802_driver); |
| 857 | |
| 858 | MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); |
| 859 | MODULE_DESCRIPTION("NCT7802Y Hardware Monitoring Driver"); |
| 860 | MODULE_LICENSE("GPL v2"); |