1 /*************************************************************************** 2 * Copyright (C) 2010-2011 Hans de Goede <hdegoede@redhat.com> * 3 * * 4 * This program is free software; you can redistribute it and/or modify * 5 * it under the terms of the GNU General Public License as published by * 6 * the Free Software Foundation; either version 2 of the License, or * 7 * (at your option) any later version. * 8 * * 9 * This program is distributed in the hope that it will be useful, * 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 12 * GNU General Public License for more details. * 13 * * 14 * You should have received a copy of the GNU General Public License * 15 * along with this program; if not, write to the * 16 * Free Software Foundation, Inc., * 17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * 18 ***************************************************************************/ 19 20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 21 22 #include <linux/module.h> 23 #include <linux/init.h> 24 #include <linux/slab.h> 25 #include <linux/jiffies.h> 26 #include <linux/platform_device.h> 27 #include <linux/hwmon.h> 28 #include <linux/hwmon-sysfs.h> 29 #include <linux/err.h> 30 #include <linux/mutex.h> 31 #include <linux/io.h> 32 #include <linux/acpi.h> 33 #include <linux/delay.h> 34 35 #define DRVNAME "sch5627" 36 #define DEVNAME DRVNAME /* We only support one model */ 37 38 #define SIO_SCH5627_EM_LD 0x0C /* Embedded Microcontroller LD */ 39 #define SIO_UNLOCK_KEY 0x55 /* Key to enable Super-I/O */ 40 #define SIO_LOCK_KEY 0xAA /* Key to disable Super-I/O */ 41 42 #define SIO_REG_LDSEL 0x07 /* Logical device select */ 43 #define SIO_REG_DEVID 0x20 /* Device ID */ 44 #define SIO_REG_ENABLE 0x30 /* Logical device enable */ 45 #define SIO_REG_ADDR 0x66 /* Logical device address (2 bytes) */ 46 47 #define SIO_SCH5627_ID 0xC6 /* Chipset ID */ 48 49 #define REGION_LENGTH 9 50 51 #define SCH5627_HWMON_ID 0xa5 52 #define SCH5627_COMPANY_ID 0x5c 53 #define SCH5627_PRIMARY_ID 0xa0 54 55 #define SCH5627_REG_BUILD_CODE 0x39 56 #define SCH5627_REG_BUILD_ID 0x3a 57 #define SCH5627_REG_HWMON_ID 0x3c 58 #define SCH5627_REG_HWMON_REV 0x3d 59 #define SCH5627_REG_COMPANY_ID 0x3e 60 #define SCH5627_REG_PRIMARY_ID 0x3f 61 #define SCH5627_REG_CTRL 0x40 62 63 #define SCH5627_NO_TEMPS 8 64 #define SCH5627_NO_FANS 4 65 #define SCH5627_NO_IN 5 66 67 static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = { 68 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 }; 69 static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = { 70 0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 }; 71 static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = { 72 0, 0, 1, 1, 0, 0, 0, 1 }; 73 static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = { 74 0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 }; 75 static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = { 76 0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 }; 77 78 static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = { 79 0x2C, 0x2E, 0x30, 0x32 }; 80 static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = { 81 0x62, 0x64, 0x66, 0x68 }; 82 83 static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = { 84 0x22, 0x23, 0x24, 0x25, 0x189 }; 85 static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = { 86 0xE4, 0xE4, 0xE3, 0xE3, 0x18A }; 87 static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = { 88 1, 0, 1, 0, 1 }; 89 static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = { 90 10745, 3660, 9765, 10745, 3660 }; 91 static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = { 92 "VCC", "VTT", "VBAT", "VTR", "V_IN" }; 93 94 struct sch5627_data { 95 unsigned short addr; 96 struct device *hwmon_dev; 97 u8 temp_max[SCH5627_NO_TEMPS]; 98 u8 temp_crit[SCH5627_NO_TEMPS]; 99 u16 fan_min[SCH5627_NO_FANS]; 100 101 struct mutex update_lock; 102 char valid; /* !=0 if following fields are valid */ 103 unsigned long last_updated; /* In jiffies */ 104 u16 temp[SCH5627_NO_TEMPS]; 105 u16 fan[SCH5627_NO_FANS]; 106 u16 in[SCH5627_NO_IN]; 107 }; 108 109 static struct platform_device *sch5627_pdev; 110 111 /* Super I/O functions */ 112 static inline int superio_inb(int base, int reg) 113 { 114 outb(reg, base); 115 return inb(base + 1); 116 } 117 118 static inline int superio_enter(int base) 119 { 120 /* Don't step on other drivers' I/O space by accident */ 121 if (!request_muxed_region(base, 2, DRVNAME)) { 122 pr_err("I/O address 0x%04x already in use\n", base); 123 return -EBUSY; 124 } 125 126 outb(SIO_UNLOCK_KEY, base); 127 128 return 0; 129 } 130 131 static inline void superio_select(int base, int ld) 132 { 133 outb(SIO_REG_LDSEL, base); 134 outb(ld, base + 1); 135 } 136 137 static inline void superio_exit(int base) 138 { 139 outb(SIO_LOCK_KEY, base); 140 release_region(base, 2); 141 } 142 143 static int sch5627_read_virtual_reg(struct sch5627_data *data, u16 reg) 144 { 145 u8 val; 146 int i; 147 /* 148 * According to SMSC for the commands we use the maximum time for 149 * the EM to respond is 15 ms, but testing shows in practice it 150 * responds within 15-32 reads, so we first busy poll, and if 151 * that fails sleep a bit and try again until we are way past 152 * the 15 ms maximum response time. 153 */ 154 const int max_busy_polls = 64; 155 const int max_lazy_polls = 32; 156 157 /* (Optional) Write-Clear the EC to Host Mailbox Register */ 158 val = inb(data->addr + 1); 159 outb(val, data->addr + 1); 160 161 /* Set Mailbox Address Pointer to first location in Region 1 */ 162 outb(0x00, data->addr + 2); 163 outb(0x80, data->addr + 3); 164 165 /* Write Request Packet Header */ 166 outb(0x02, data->addr + 4); /* Access Type: VREG read */ 167 outb(0x01, data->addr + 5); /* # of Entries: 1 Byte (8-bit) */ 168 outb(0x04, data->addr + 2); /* Mailbox AP to first data entry loc. */ 169 170 /* Write Address field */ 171 outb(reg & 0xff, data->addr + 6); 172 outb(reg >> 8, data->addr + 7); 173 174 /* Execute the Random Access Command */ 175 outb(0x01, data->addr); /* Write 01h to the Host-to-EC register */ 176 177 /* EM Interface Polling "Algorithm" */ 178 for (i = 0; i < max_busy_polls + max_lazy_polls; i++) { 179 if (i >= max_busy_polls) 180 msleep(1); 181 /* Read Interrupt source Register */ 182 val = inb(data->addr + 8); 183 /* Write Clear the interrupt source bits */ 184 if (val) 185 outb(val, data->addr + 8); 186 /* Command Completed ? */ 187 if (val & 0x01) 188 break; 189 } 190 if (i == max_busy_polls + max_lazy_polls) { 191 pr_err("Max retries exceeded reading virtual " 192 "register 0x%04hx (%d)\n", reg, 1); 193 return -EIO; 194 } 195 196 /* 197 * According to SMSC we may need to retry this, but sofar I've always 198 * seen this succeed in 1 try. 199 */ 200 for (i = 0; i < max_busy_polls; i++) { 201 /* Read EC-to-Host Register */ 202 val = inb(data->addr + 1); 203 /* Command Completed ? */ 204 if (val == 0x01) 205 break; 206 207 if (i == 0) 208 pr_warn("EC reports: 0x%02x reading virtual register " 209 "0x%04hx\n", (unsigned int)val, reg); 210 } 211 if (i == max_busy_polls) { 212 pr_err("Max retries exceeded reading virtual " 213 "register 0x%04hx (%d)\n", reg, 2); 214 return -EIO; 215 } 216 217 /* 218 * According to the SMSC app note we should now do: 219 * 220 * Set Mailbox Address Pointer to first location in Region 1 * 221 * outb(0x00, data->addr + 2); 222 * outb(0x80, data->addr + 3); 223 * 224 * But if we do that things don't work, so let's not. 225 */ 226 227 /* Read Data from Mailbox */ 228 return inb(data->addr + 4); 229 } 230 231 static int sch5627_read_virtual_reg16(struct sch5627_data *data, u16 reg) 232 { 233 int lsb, msb; 234 235 /* Read LSB first, this will cause the matching MSB to be latched */ 236 lsb = sch5627_read_virtual_reg(data, reg); 237 if (lsb < 0) 238 return lsb; 239 240 msb = sch5627_read_virtual_reg(data, reg + 1); 241 if (msb < 0) 242 return msb; 243 244 return lsb | (msb << 8); 245 } 246 247 static int sch5627_read_virtual_reg12(struct sch5627_data *data, u16 msb_reg, 248 u16 lsn_reg, int high_nibble) 249 { 250 int msb, lsn; 251 252 /* Read MSB first, this will cause the matching LSN to be latched */ 253 msb = sch5627_read_virtual_reg(data, msb_reg); 254 if (msb < 0) 255 return msb; 256 257 lsn = sch5627_read_virtual_reg(data, lsn_reg); 258 if (lsn < 0) 259 return lsn; 260 261 if (high_nibble) 262 return (msb << 4) | (lsn >> 4); 263 else 264 return (msb << 4) | (lsn & 0x0f); 265 } 266 267 static struct sch5627_data *sch5627_update_device(struct device *dev) 268 { 269 struct sch5627_data *data = dev_get_drvdata(dev); 270 struct sch5627_data *ret = data; 271 int i, val; 272 273 mutex_lock(&data->update_lock); 274 275 /* Cache the values for 1 second */ 276 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 277 for (i = 0; i < SCH5627_NO_TEMPS; i++) { 278 val = sch5627_read_virtual_reg12(data, 279 SCH5627_REG_TEMP_MSB[i], 280 SCH5627_REG_TEMP_LSN[i], 281 SCH5627_REG_TEMP_HIGH_NIBBLE[i]); 282 if (unlikely(val < 0)) { 283 ret = ERR_PTR(val); 284 goto abort; 285 } 286 data->temp[i] = val; 287 } 288 289 for (i = 0; i < SCH5627_NO_FANS; i++) { 290 val = sch5627_read_virtual_reg16(data, 291 SCH5627_REG_FAN[i]); 292 if (unlikely(val < 0)) { 293 ret = ERR_PTR(val); 294 goto abort; 295 } 296 data->fan[i] = val; 297 } 298 299 for (i = 0; i < SCH5627_NO_IN; i++) { 300 val = sch5627_read_virtual_reg12(data, 301 SCH5627_REG_IN_MSB[i], 302 SCH5627_REG_IN_LSN[i], 303 SCH5627_REG_IN_HIGH_NIBBLE[i]); 304 if (unlikely(val < 0)) { 305 ret = ERR_PTR(val); 306 goto abort; 307 } 308 data->in[i] = val; 309 } 310 311 data->last_updated = jiffies; 312 data->valid = 1; 313 } 314 abort: 315 mutex_unlock(&data->update_lock); 316 return ret; 317 } 318 319 static int __devinit sch5627_read_limits(struct sch5627_data *data) 320 { 321 int i, val; 322 323 for (i = 0; i < SCH5627_NO_TEMPS; i++) { 324 /* 325 * Note what SMSC calls ABS, is what lm_sensors calls max 326 * (aka high), and HIGH is what lm_sensors calls crit. 327 */ 328 val = sch5627_read_virtual_reg(data, SCH5627_REG_TEMP_ABS[i]); 329 if (val < 0) 330 return val; 331 data->temp_max[i] = val; 332 333 val = sch5627_read_virtual_reg(data, SCH5627_REG_TEMP_HIGH[i]); 334 if (val < 0) 335 return val; 336 data->temp_crit[i] = val; 337 } 338 for (i = 0; i < SCH5627_NO_FANS; i++) { 339 val = sch5627_read_virtual_reg16(data, SCH5627_REG_FAN_MIN[i]); 340 if (val < 0) 341 return val; 342 data->fan_min[i] = val; 343 } 344 345 return 0; 346 } 347 348 static int reg_to_temp(u16 reg) 349 { 350 return (reg * 625) / 10 - 64000; 351 } 352 353 static int reg_to_temp_limit(u8 reg) 354 { 355 return (reg - 64) * 1000; 356 } 357 358 static int reg_to_rpm(u16 reg) 359 { 360 if (reg == 0) 361 return -EIO; 362 if (reg == 0xffff) 363 return 0; 364 365 return 5400540 / reg; 366 } 367 368 static ssize_t show_name(struct device *dev, struct device_attribute *devattr, 369 char *buf) 370 { 371 return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME); 372 } 373 374 static ssize_t show_temp(struct device *dev, struct device_attribute 375 *devattr, char *buf) 376 { 377 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 378 struct sch5627_data *data = sch5627_update_device(dev); 379 int val; 380 381 if (IS_ERR(data)) 382 return PTR_ERR(data); 383 384 val = reg_to_temp(data->temp[attr->index]); 385 return snprintf(buf, PAGE_SIZE, "%d\n", val); 386 } 387 388 static ssize_t show_temp_fault(struct device *dev, struct device_attribute 389 *devattr, char *buf) 390 { 391 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 392 struct sch5627_data *data = sch5627_update_device(dev); 393 394 if (IS_ERR(data)) 395 return PTR_ERR(data); 396 397 return snprintf(buf, PAGE_SIZE, "%d\n", data->temp[attr->index] == 0); 398 } 399 400 static ssize_t show_temp_max(struct device *dev, struct device_attribute 401 *devattr, char *buf) 402 { 403 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 404 struct sch5627_data *data = dev_get_drvdata(dev); 405 int val; 406 407 val = reg_to_temp_limit(data->temp_max[attr->index]); 408 return snprintf(buf, PAGE_SIZE, "%d\n", val); 409 } 410 411 static ssize_t show_temp_crit(struct device *dev, struct device_attribute 412 *devattr, char *buf) 413 { 414 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 415 struct sch5627_data *data = dev_get_drvdata(dev); 416 int val; 417 418 val = reg_to_temp_limit(data->temp_crit[attr->index]); 419 return snprintf(buf, PAGE_SIZE, "%d\n", val); 420 } 421 422 static ssize_t show_fan(struct device *dev, struct device_attribute 423 *devattr, char *buf) 424 { 425 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 426 struct sch5627_data *data = sch5627_update_device(dev); 427 int val; 428 429 if (IS_ERR(data)) 430 return PTR_ERR(data); 431 432 val = reg_to_rpm(data->fan[attr->index]); 433 if (val < 0) 434 return val; 435 436 return snprintf(buf, PAGE_SIZE, "%d\n", val); 437 } 438 439 static ssize_t show_fan_fault(struct device *dev, struct device_attribute 440 *devattr, char *buf) 441 { 442 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 443 struct sch5627_data *data = sch5627_update_device(dev); 444 445 if (IS_ERR(data)) 446 return PTR_ERR(data); 447 448 return snprintf(buf, PAGE_SIZE, "%d\n", 449 data->fan[attr->index] == 0xffff); 450 } 451 452 static ssize_t show_fan_min(struct device *dev, struct device_attribute 453 *devattr, char *buf) 454 { 455 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 456 struct sch5627_data *data = dev_get_drvdata(dev); 457 int val = reg_to_rpm(data->fan_min[attr->index]); 458 if (val < 0) 459 return val; 460 461 return snprintf(buf, PAGE_SIZE, "%d\n", val); 462 } 463 464 static ssize_t show_in(struct device *dev, struct device_attribute 465 *devattr, char *buf) 466 { 467 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 468 struct sch5627_data *data = sch5627_update_device(dev); 469 int val; 470 471 if (IS_ERR(data)) 472 return PTR_ERR(data); 473 474 val = DIV_ROUND_CLOSEST( 475 data->in[attr->index] * SCH5627_REG_IN_FACTOR[attr->index], 476 10000); 477 return snprintf(buf, PAGE_SIZE, "%d\n", val); 478 } 479 480 static ssize_t show_in_label(struct device *dev, struct device_attribute 481 *devattr, char *buf) 482 { 483 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 484 485 return snprintf(buf, PAGE_SIZE, "%s\n", 486 SCH5627_IN_LABELS[attr->index]); 487 } 488 489 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 490 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); 491 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); 492 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); 493 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); 494 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4); 495 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5); 496 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6); 497 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7); 498 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0); 499 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1); 500 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2); 501 static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3); 502 static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4); 503 static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5); 504 static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6); 505 static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7); 506 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0); 507 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1); 508 static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2); 509 static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3); 510 static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4); 511 static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5); 512 static SENSOR_DEVICE_ATTR(temp7_max, S_IRUGO, show_temp_max, NULL, 6); 513 static SENSOR_DEVICE_ATTR(temp8_max, S_IRUGO, show_temp_max, NULL, 7); 514 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0); 515 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1); 516 static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2); 517 static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3); 518 static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4); 519 static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5); 520 static SENSOR_DEVICE_ATTR(temp7_crit, S_IRUGO, show_temp_crit, NULL, 6); 521 static SENSOR_DEVICE_ATTR(temp8_crit, S_IRUGO, show_temp_crit, NULL, 7); 522 523 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 524 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1); 525 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2); 526 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3); 527 static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0); 528 static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1); 529 static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2); 530 static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3); 531 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan_min, NULL, 0); 532 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan_min, NULL, 1); 533 static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO, show_fan_min, NULL, 2); 534 static SENSOR_DEVICE_ATTR(fan4_min, S_IRUGO, show_fan_min, NULL, 3); 535 536 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0); 537 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1); 538 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2); 539 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3); 540 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 4); 541 static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_in_label, NULL, 0); 542 static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_in_label, NULL, 1); 543 static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_in_label, NULL, 2); 544 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_in_label, NULL, 3); 545 546 static struct attribute *sch5627_attributes[] = { 547 &dev_attr_name.attr, 548 549 &sensor_dev_attr_temp1_input.dev_attr.attr, 550 &sensor_dev_attr_temp2_input.dev_attr.attr, 551 &sensor_dev_attr_temp3_input.dev_attr.attr, 552 &sensor_dev_attr_temp4_input.dev_attr.attr, 553 &sensor_dev_attr_temp5_input.dev_attr.attr, 554 &sensor_dev_attr_temp6_input.dev_attr.attr, 555 &sensor_dev_attr_temp7_input.dev_attr.attr, 556 &sensor_dev_attr_temp8_input.dev_attr.attr, 557 &sensor_dev_attr_temp1_fault.dev_attr.attr, 558 &sensor_dev_attr_temp2_fault.dev_attr.attr, 559 &sensor_dev_attr_temp3_fault.dev_attr.attr, 560 &sensor_dev_attr_temp4_fault.dev_attr.attr, 561 &sensor_dev_attr_temp5_fault.dev_attr.attr, 562 &sensor_dev_attr_temp6_fault.dev_attr.attr, 563 &sensor_dev_attr_temp7_fault.dev_attr.attr, 564 &sensor_dev_attr_temp8_fault.dev_attr.attr, 565 &sensor_dev_attr_temp1_max.dev_attr.attr, 566 &sensor_dev_attr_temp2_max.dev_attr.attr, 567 &sensor_dev_attr_temp3_max.dev_attr.attr, 568 &sensor_dev_attr_temp4_max.dev_attr.attr, 569 &sensor_dev_attr_temp5_max.dev_attr.attr, 570 &sensor_dev_attr_temp6_max.dev_attr.attr, 571 &sensor_dev_attr_temp7_max.dev_attr.attr, 572 &sensor_dev_attr_temp8_max.dev_attr.attr, 573 &sensor_dev_attr_temp1_crit.dev_attr.attr, 574 &sensor_dev_attr_temp2_crit.dev_attr.attr, 575 &sensor_dev_attr_temp3_crit.dev_attr.attr, 576 &sensor_dev_attr_temp4_crit.dev_attr.attr, 577 &sensor_dev_attr_temp5_crit.dev_attr.attr, 578 &sensor_dev_attr_temp6_crit.dev_attr.attr, 579 &sensor_dev_attr_temp7_crit.dev_attr.attr, 580 &sensor_dev_attr_temp8_crit.dev_attr.attr, 581 582 &sensor_dev_attr_fan1_input.dev_attr.attr, 583 &sensor_dev_attr_fan2_input.dev_attr.attr, 584 &sensor_dev_attr_fan3_input.dev_attr.attr, 585 &sensor_dev_attr_fan4_input.dev_attr.attr, 586 &sensor_dev_attr_fan1_fault.dev_attr.attr, 587 &sensor_dev_attr_fan2_fault.dev_attr.attr, 588 &sensor_dev_attr_fan3_fault.dev_attr.attr, 589 &sensor_dev_attr_fan4_fault.dev_attr.attr, 590 &sensor_dev_attr_fan1_min.dev_attr.attr, 591 &sensor_dev_attr_fan2_min.dev_attr.attr, 592 &sensor_dev_attr_fan3_min.dev_attr.attr, 593 &sensor_dev_attr_fan4_min.dev_attr.attr, 594 595 &sensor_dev_attr_in0_input.dev_attr.attr, 596 &sensor_dev_attr_in1_input.dev_attr.attr, 597 &sensor_dev_attr_in2_input.dev_attr.attr, 598 &sensor_dev_attr_in3_input.dev_attr.attr, 599 &sensor_dev_attr_in4_input.dev_attr.attr, 600 &sensor_dev_attr_in0_label.dev_attr.attr, 601 &sensor_dev_attr_in1_label.dev_attr.attr, 602 &sensor_dev_attr_in2_label.dev_attr.attr, 603 &sensor_dev_attr_in3_label.dev_attr.attr, 604 /* No in4_label as in4 is a generic input pin */ 605 606 NULL 607 }; 608 609 static const struct attribute_group sch5627_group = { 610 .attrs = sch5627_attributes, 611 }; 612 613 static int sch5627_remove(struct platform_device *pdev) 614 { 615 struct sch5627_data *data = platform_get_drvdata(pdev); 616 617 if (data->hwmon_dev) 618 hwmon_device_unregister(data->hwmon_dev); 619 620 sysfs_remove_group(&pdev->dev.kobj, &sch5627_group); 621 platform_set_drvdata(pdev, NULL); 622 kfree(data); 623 624 return 0; 625 } 626 627 static int __devinit sch5627_probe(struct platform_device *pdev) 628 { 629 struct sch5627_data *data; 630 int err, build_code, build_id, hwmon_rev, val; 631 632 data = kzalloc(sizeof(struct sch5627_data), GFP_KERNEL); 633 if (!data) 634 return -ENOMEM; 635 636 data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start; 637 mutex_init(&data->update_lock); 638 platform_set_drvdata(pdev, data); 639 640 val = sch5627_read_virtual_reg(data, SCH5627_REG_HWMON_ID); 641 if (val < 0) { 642 err = val; 643 goto error; 644 } 645 if (val != SCH5627_HWMON_ID) { 646 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon", 647 val, SCH5627_HWMON_ID); 648 err = -ENODEV; 649 goto error; 650 } 651 652 val = sch5627_read_virtual_reg(data, SCH5627_REG_COMPANY_ID); 653 if (val < 0) { 654 err = val; 655 goto error; 656 } 657 if (val != SCH5627_COMPANY_ID) { 658 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company", 659 val, SCH5627_COMPANY_ID); 660 err = -ENODEV; 661 goto error; 662 } 663 664 val = sch5627_read_virtual_reg(data, SCH5627_REG_PRIMARY_ID); 665 if (val < 0) { 666 err = val; 667 goto error; 668 } 669 if (val != SCH5627_PRIMARY_ID) { 670 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary", 671 val, SCH5627_PRIMARY_ID); 672 err = -ENODEV; 673 goto error; 674 } 675 676 build_code = sch5627_read_virtual_reg(data, SCH5627_REG_BUILD_CODE); 677 if (build_code < 0) { 678 err = build_code; 679 goto error; 680 } 681 682 build_id = sch5627_read_virtual_reg16(data, SCH5627_REG_BUILD_ID); 683 if (build_id < 0) { 684 err = build_id; 685 goto error; 686 } 687 688 hwmon_rev = sch5627_read_virtual_reg(data, SCH5627_REG_HWMON_REV); 689 if (hwmon_rev < 0) { 690 err = hwmon_rev; 691 goto error; 692 } 693 694 val = sch5627_read_virtual_reg(data, SCH5627_REG_CTRL); 695 if (val < 0) { 696 err = val; 697 goto error; 698 } 699 if (!(val & 0x01)) { 700 pr_err("hardware monitoring not enabled\n"); 701 err = -ENODEV; 702 goto error; 703 } 704 705 /* 706 * Read limits, we do this only once as reading a register on 707 * the sch5627 is quite expensive (and they don't change). 708 */ 709 err = sch5627_read_limits(data); 710 if (err) 711 goto error; 712 713 pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n", 714 build_code, build_id, hwmon_rev); 715 716 /* Register sysfs interface files */ 717 err = sysfs_create_group(&pdev->dev.kobj, &sch5627_group); 718 if (err) 719 goto error; 720 721 data->hwmon_dev = hwmon_device_register(&pdev->dev); 722 if (IS_ERR(data->hwmon_dev)) { 723 err = PTR_ERR(data->hwmon_dev); 724 data->hwmon_dev = NULL; 725 goto error; 726 } 727 728 return 0; 729 730 error: 731 sch5627_remove(pdev); 732 return err; 733 } 734 735 static int __init sch5627_find(int sioaddr, unsigned short *address) 736 { 737 u8 devid; 738 int err = superio_enter(sioaddr); 739 if (err) 740 return err; 741 742 devid = superio_inb(sioaddr, SIO_REG_DEVID); 743 if (devid != SIO_SCH5627_ID) { 744 pr_debug("Unsupported device id: 0x%02x\n", 745 (unsigned int)devid); 746 err = -ENODEV; 747 goto exit; 748 } 749 750 superio_select(sioaddr, SIO_SCH5627_EM_LD); 751 752 if (!(superio_inb(sioaddr, SIO_REG_ENABLE) & 0x01)) { 753 pr_warn("Device not activated\n"); 754 err = -ENODEV; 755 goto exit; 756 } 757 758 /* 759 * Warning the order of the low / high byte is the other way around 760 * as on most other superio devices!! 761 */ 762 *address = superio_inb(sioaddr, SIO_REG_ADDR) | 763 superio_inb(sioaddr, SIO_REG_ADDR + 1) << 8; 764 if (*address == 0) { 765 pr_warn("Base address not set\n"); 766 err = -ENODEV; 767 goto exit; 768 } 769 770 pr_info("Found %s chip at %#hx\n", DEVNAME, *address); 771 exit: 772 superio_exit(sioaddr); 773 return err; 774 } 775 776 static int __init sch5627_device_add(unsigned short address) 777 { 778 struct resource res = { 779 .start = address, 780 .end = address + REGION_LENGTH - 1, 781 .flags = IORESOURCE_IO, 782 }; 783 int err; 784 785 sch5627_pdev = platform_device_alloc(DRVNAME, address); 786 if (!sch5627_pdev) 787 return -ENOMEM; 788 789 res.name = sch5627_pdev->name; 790 err = acpi_check_resource_conflict(&res); 791 if (err) 792 goto exit_device_put; 793 794 err = platform_device_add_resources(sch5627_pdev, &res, 1); 795 if (err) { 796 pr_err("Device resource addition failed\n"); 797 goto exit_device_put; 798 } 799 800 err = platform_device_add(sch5627_pdev); 801 if (err) { 802 pr_err("Device addition failed\n"); 803 goto exit_device_put; 804 } 805 806 return 0; 807 808 exit_device_put: 809 platform_device_put(sch5627_pdev); 810 811 return err; 812 } 813 814 static struct platform_driver sch5627_driver = { 815 .driver = { 816 .owner = THIS_MODULE, 817 .name = DRVNAME, 818 }, 819 .probe = sch5627_probe, 820 .remove = sch5627_remove, 821 }; 822 823 static int __init sch5627_init(void) 824 { 825 int err = -ENODEV; 826 unsigned short address; 827 828 if (sch5627_find(0x4e, &address) && sch5627_find(0x2e, &address)) 829 goto exit; 830 831 err = platform_driver_register(&sch5627_driver); 832 if (err) 833 goto exit; 834 835 err = sch5627_device_add(address); 836 if (err) 837 goto exit_driver; 838 839 return 0; 840 841 exit_driver: 842 platform_driver_unregister(&sch5627_driver); 843 exit: 844 return err; 845 } 846 847 static void __exit sch5627_exit(void) 848 { 849 platform_device_unregister(sch5627_pdev); 850 platform_driver_unregister(&sch5627_driver); 851 } 852 853 MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver"); 854 MODULE_AUTHOR("Hans de Goede (hdegoede@redhat.com)"); 855 MODULE_LICENSE("GPL"); 856 857 module_init(sch5627_init); 858 module_exit(sch5627_exit); 859