| 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
| 2 | /* |
| 3 | * vt8231.c - Part of lm_sensors, Linux kernel modules |
| 4 | * for hardware monitoring |
| 5 | * |
| 6 | * Copyright (c) 2005 Roger Lucas <vt8231@hiddenengine.co.uk> |
| 7 | * Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com> |
| 8 | * Aaron M. Marsh <amarsh@sdf.lonestar.org> |
| 9 | */ |
| 10 | |
| 11 | /* |
| 12 | * Supports VIA VT8231 South Bridge embedded sensors |
| 13 | */ |
| 14 | |
| 15 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 16 | |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/pci.h> |
| 21 | #include <linux/jiffies.h> |
| 22 | #include <linux/platform_device.h> |
| 23 | #include <linux/hwmon.h> |
| 24 | #include <linux/hwmon-sysfs.h> |
| 25 | #include <linux/err.h> |
| 26 | #include <linux/mutex.h> |
| 27 | #include <linux/acpi.h> |
| 28 | #include <linux/io.h> |
| 29 | |
| 30 | static int force_addr; |
| 31 | module_param(force_addr, int, 0); |
| 32 | MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors"); |
| 33 | |
| 34 | static struct platform_device *pdev; |
| 35 | |
| 36 | #define VT8231_EXTENT 0x80 |
| 37 | #define VT8231_BASE_REG 0x70 |
| 38 | #define VT8231_ENABLE_REG 0x74 |
| 39 | |
| 40 | #define DRIVER_NAME "vt8231" |
| 41 | |
| 42 | /* |
| 43 | * The VT8231 registers |
| 44 | * |
| 45 | * The reset value for the input channel configuration is used (Reg 0x4A=0x07) |
| 46 | * which sets the selected inputs marked with '*' below if multiple options are |
| 47 | * possible: |
| 48 | * |
| 49 | * Voltage Mode Temperature Mode |
| 50 | * Sensor Linux Id Linux Id VIA Id |
| 51 | * -------- -------- -------- ------ |
| 52 | * CPU Diode N/A temp1 0 |
| 53 | * UIC1 in0 temp2 * 1 |
| 54 | * UIC2 in1 * temp3 2 |
| 55 | * UIC3 in2 * temp4 3 |
| 56 | * UIC4 in3 * temp5 4 |
| 57 | * UIC5 in4 * temp6 5 |
| 58 | * 3.3V in5 N/A |
| 59 | * |
| 60 | * Note that the BIOS may set the configuration register to a different value |
| 61 | * to match the motherboard configuration. |
| 62 | */ |
| 63 | |
| 64 | /* fans numbered 0-1 */ |
| 65 | #define VT8231_REG_FAN_MIN(nr) (0x3b + (nr)) |
| 66 | #define VT8231_REG_FAN(nr) (0x29 + (nr)) |
| 67 | |
| 68 | /* Voltage inputs numbered 0-5 */ |
| 69 | |
| 70 | static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 }; |
| 71 | static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 }; |
| 72 | static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 }; |
| 73 | |
| 74 | /* |
| 75 | * Temperatures are numbered 1-6 according to the Linux kernel specification. |
| 76 | * |
| 77 | * In the VIA datasheet, however, the temperatures are numbered from zero. |
| 78 | * Since it is important that this driver can easily be compared to the VIA |
| 79 | * datasheet, we will use the VIA numbering within this driver and map the |
| 80 | * kernel sysfs device name to the VIA number in the sysfs callback. |
| 81 | */ |
| 82 | |
| 83 | #define VT8231_REG_TEMP_LOW01 0x49 |
| 84 | #define VT8231_REG_TEMP_LOW25 0x4d |
| 85 | |
| 86 | static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 }; |
| 87 | static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 }; |
| 88 | static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 }; |
| 89 | |
| 90 | #define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210) |
| 91 | #define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210) |
| 92 | #define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200) |
| 93 | |
| 94 | #define VT8231_REG_CONFIG 0x40 |
| 95 | #define VT8231_REG_ALARM1 0x41 |
| 96 | #define VT8231_REG_ALARM2 0x42 |
| 97 | #define VT8231_REG_FANDIV 0x47 |
| 98 | #define VT8231_REG_UCH_CONFIG 0x4a |
| 99 | #define VT8231_REG_TEMP1_CONFIG 0x4b |
| 100 | #define VT8231_REG_TEMP2_CONFIG 0x4c |
| 101 | |
| 102 | /* |
| 103 | * temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux |
| 104 | * numbering |
| 105 | */ |
| 106 | #define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \ |
| 107 | ((ch_config) >> ((i)+1)) & 0x01) |
| 108 | /* voltages 0-5 */ |
| 109 | #define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \ |
| 110 | !(((ch_config) >> ((i)+2)) & 0x01)) |
| 111 | |
| 112 | #define DIV_FROM_REG(val) (1 << (val)) |
| 113 | |
| 114 | /* |
| 115 | * NB The values returned here are NOT temperatures. The calibration curves |
| 116 | * for the thermistor curves are board-specific and must go in the |
| 117 | * sensors.conf file. Temperature sensors are actually ten bits, but the |
| 118 | * VIA datasheet only considers the 8 MSBs obtained from the regtemp[] |
| 119 | * register. The temperature value returned should have a magnitude of 3, |
| 120 | * so we use the VIA scaling as the "true" scaling and use the remaining 2 |
| 121 | * LSBs as fractional precision. |
| 122 | * |
| 123 | * All the on-chip hardware temperature comparisons for the alarms are only |
| 124 | * 8-bits wide, and compare against the 8 MSBs of the temperature. The bits |
| 125 | * in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are |
| 126 | * ignored. |
| 127 | */ |
| 128 | |
| 129 | /* |
| 130 | ****** FAN RPM CONVERSIONS ******** |
| 131 | * This chip saturates back at 0, not at 255 like many the other chips. |
| 132 | * So, 0 means 0 RPM |
| 133 | */ |
| 134 | static inline u8 FAN_TO_REG(long rpm, int div) |
| 135 | { |
| 136 | if (rpm <= 0 || rpm > 1310720) |
| 137 | return 0; |
| 138 | return clamp_val(1310720 / (rpm * div), 1, 255); |
| 139 | } |
| 140 | |
| 141 | #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div))) |
| 142 | |
| 143 | struct vt8231_data { |
| 144 | unsigned short addr; |
| 145 | const char *name; |
| 146 | |
| 147 | struct mutex update_lock; |
| 148 | struct device *hwmon_dev; |
| 149 | bool valid; /* true if following fields are valid */ |
| 150 | unsigned long last_updated; /* In jiffies */ |
| 151 | |
| 152 | u8 in[6]; /* Register value */ |
| 153 | u8 in_max[6]; /* Register value */ |
| 154 | u8 in_min[6]; /* Register value */ |
| 155 | u16 temp[6]; /* Register value 10 bit, right aligned */ |
| 156 | u8 temp_max[6]; /* Register value */ |
| 157 | u8 temp_min[6]; /* Register value */ |
| 158 | u8 fan[2]; /* Register value */ |
| 159 | u8 fan_min[2]; /* Register value */ |
| 160 | u8 fan_div[2]; /* Register encoding, shifted right */ |
| 161 | u16 alarms; /* Register encoding */ |
| 162 | u8 uch_config; |
| 163 | }; |
| 164 | |
| 165 | static struct pci_dev *s_bridge; |
| 166 | |
| 167 | static inline int vt8231_read_value(struct vt8231_data *data, u8 reg) |
| 168 | { |
| 169 | return inb_p(data->addr + reg); |
| 170 | } |
| 171 | |
| 172 | static inline void vt8231_write_value(struct vt8231_data *data, u8 reg, |
| 173 | u8 value) |
| 174 | { |
| 175 | outb_p(value, data->addr + reg); |
| 176 | } |
| 177 | |
| 178 | static struct vt8231_data *vt8231_update_device(struct device *dev) |
| 179 | { |
| 180 | struct vt8231_data *data = dev_get_drvdata(dev); |
| 181 | int i; |
| 182 | u16 low; |
| 183 | |
| 184 | mutex_lock(&data->update_lock); |
| 185 | |
| 186 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) |
| 187 | || !data->valid) { |
| 188 | for (i = 0; i < 6; i++) { |
| 189 | if (ISVOLT(i, data->uch_config)) { |
| 190 | data->in[i] = vt8231_read_value(data, |
| 191 | regvolt[i]); |
| 192 | data->in_min[i] = vt8231_read_value(data, |
| 193 | regvoltmin[i]); |
| 194 | data->in_max[i] = vt8231_read_value(data, |
| 195 | regvoltmax[i]); |
| 196 | } |
| 197 | } |
| 198 | for (i = 0; i < 2; i++) { |
| 199 | data->fan[i] = vt8231_read_value(data, |
| 200 | VT8231_REG_FAN(i)); |
| 201 | data->fan_min[i] = vt8231_read_value(data, |
| 202 | VT8231_REG_FAN_MIN(i)); |
| 203 | } |
| 204 | |
| 205 | low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01); |
| 206 | low = (low >> 6) | ((low & 0x30) >> 2) |
| 207 | | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4); |
| 208 | for (i = 0; i < 6; i++) { |
| 209 | if (ISTEMP(i, data->uch_config)) { |
| 210 | data->temp[i] = (vt8231_read_value(data, |
| 211 | regtemp[i]) << 2) |
| 212 | | ((low >> (2 * i)) & 0x03); |
| 213 | data->temp_max[i] = vt8231_read_value(data, |
| 214 | regtempmax[i]); |
| 215 | data->temp_min[i] = vt8231_read_value(data, |
| 216 | regtempmin[i]); |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | i = vt8231_read_value(data, VT8231_REG_FANDIV); |
| 221 | data->fan_div[0] = (i >> 4) & 0x03; |
| 222 | data->fan_div[1] = i >> 6; |
| 223 | data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) | |
| 224 | (vt8231_read_value(data, VT8231_REG_ALARM2) << 8); |
| 225 | |
| 226 | /* Set alarm flags correctly */ |
| 227 | if (!data->fan[0] && data->fan_min[0]) |
| 228 | data->alarms |= 0x40; |
| 229 | else if (data->fan[0] && !data->fan_min[0]) |
| 230 | data->alarms &= ~0x40; |
| 231 | |
| 232 | if (!data->fan[1] && data->fan_min[1]) |
| 233 | data->alarms |= 0x80; |
| 234 | else if (data->fan[1] && !data->fan_min[1]) |
| 235 | data->alarms &= ~0x80; |
| 236 | |
| 237 | data->last_updated = jiffies; |
| 238 | data->valid = true; |
| 239 | } |
| 240 | |
| 241 | mutex_unlock(&data->update_lock); |
| 242 | |
| 243 | return data; |
| 244 | } |
| 245 | |
| 246 | /* following are the sysfs callback functions */ |
| 247 | static ssize_t in_show(struct device *dev, struct device_attribute *attr, |
| 248 | char *buf) |
| 249 | { |
| 250 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| 251 | int nr = sensor_attr->index; |
| 252 | struct vt8231_data *data = vt8231_update_device(dev); |
| 253 | |
| 254 | return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958); |
| 255 | } |
| 256 | |
| 257 | static ssize_t in_min_show(struct device *dev, struct device_attribute *attr, |
| 258 | char *buf) |
| 259 | { |
| 260 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| 261 | int nr = sensor_attr->index; |
| 262 | struct vt8231_data *data = vt8231_update_device(dev); |
| 263 | |
| 264 | return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958); |
| 265 | } |
| 266 | |
| 267 | static ssize_t in_max_show(struct device *dev, struct device_attribute *attr, |
| 268 | char *buf) |
| 269 | { |
| 270 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| 271 | int nr = sensor_attr->index; |
| 272 | struct vt8231_data *data = vt8231_update_device(dev); |
| 273 | |
| 274 | return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958)); |
| 275 | } |
| 276 | |
| 277 | static ssize_t in_min_store(struct device *dev, struct device_attribute *attr, |
| 278 | const char *buf, size_t count) |
| 279 | { |
| 280 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| 281 | int nr = sensor_attr->index; |
| 282 | struct vt8231_data *data = dev_get_drvdata(dev); |
| 283 | unsigned long val; |
| 284 | int err; |
| 285 | |
| 286 | err = kstrtoul(buf, 10, &val); |
| 287 | if (err) |
| 288 | return err; |
| 289 | |
| 290 | mutex_lock(&data->update_lock); |
| 291 | data->in_min[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255); |
| 292 | vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]); |
| 293 | mutex_unlock(&data->update_lock); |
| 294 | return count; |
| 295 | } |
| 296 | |
| 297 | static ssize_t in_max_store(struct device *dev, struct device_attribute *attr, |
| 298 | const char *buf, size_t count) |
| 299 | { |
| 300 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| 301 | int nr = sensor_attr->index; |
| 302 | struct vt8231_data *data = dev_get_drvdata(dev); |
| 303 | unsigned long val; |
| 304 | int err; |
| 305 | |
| 306 | err = kstrtoul(buf, 10, &val); |
| 307 | if (err) |
| 308 | return err; |
| 309 | |
| 310 | mutex_lock(&data->update_lock); |
| 311 | data->in_max[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255); |
| 312 | vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]); |
| 313 | mutex_unlock(&data->update_lock); |
| 314 | return count; |
| 315 | } |
| 316 | |
| 317 | /* Special case for input 5 as this has 3.3V scaling built into the chip */ |
| 318 | static ssize_t in5_input_show(struct device *dev, |
| 319 | struct device_attribute *attr, char *buf) |
| 320 | { |
| 321 | struct vt8231_data *data = vt8231_update_device(dev); |
| 322 | |
| 323 | return sprintf(buf, "%d\n", |
| 324 | (((data->in[5] - 3) * 10000 * 54) / (958 * 34))); |
| 325 | } |
| 326 | |
| 327 | static ssize_t in5_min_show(struct device *dev, struct device_attribute *attr, |
| 328 | char *buf) |
| 329 | { |
| 330 | struct vt8231_data *data = vt8231_update_device(dev); |
| 331 | |
| 332 | return sprintf(buf, "%d\n", |
| 333 | (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34))); |
| 334 | } |
| 335 | |
| 336 | static ssize_t in5_max_show(struct device *dev, struct device_attribute *attr, |
| 337 | char *buf) |
| 338 | { |
| 339 | struct vt8231_data *data = vt8231_update_device(dev); |
| 340 | |
| 341 | return sprintf(buf, "%d\n", |
| 342 | (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34))); |
| 343 | } |
| 344 | |
| 345 | static ssize_t in5_min_store(struct device *dev, |
| 346 | struct device_attribute *attr, const char *buf, |
| 347 | size_t count) |
| 348 | { |
| 349 | struct vt8231_data *data = dev_get_drvdata(dev); |
| 350 | unsigned long val; |
| 351 | int err; |
| 352 | |
| 353 | err = kstrtoul(buf, 10, &val); |
| 354 | if (err) |
| 355 | return err; |
| 356 | |
| 357 | mutex_lock(&data->update_lock); |
| 358 | data->in_min[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3, |
| 359 | 0, 255); |
| 360 | vt8231_write_value(data, regvoltmin[5], data->in_min[5]); |
| 361 | mutex_unlock(&data->update_lock); |
| 362 | return count; |
| 363 | } |
| 364 | |
| 365 | static ssize_t in5_max_store(struct device *dev, |
| 366 | struct device_attribute *attr, const char *buf, |
| 367 | size_t count) |
| 368 | { |
| 369 | struct vt8231_data *data = dev_get_drvdata(dev); |
| 370 | unsigned long val; |
| 371 | int err; |
| 372 | |
| 373 | err = kstrtoul(buf, 10, &val); |
| 374 | if (err) |
| 375 | return err; |
| 376 | |
| 377 | mutex_lock(&data->update_lock); |
| 378 | data->in_max[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3, |
| 379 | 0, 255); |
| 380 | vt8231_write_value(data, regvoltmax[5], data->in_max[5]); |
| 381 | mutex_unlock(&data->update_lock); |
| 382 | return count; |
| 383 | } |
| 384 | |
| 385 | static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0); |
| 386 | static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); |
| 387 | static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); |
| 388 | static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1); |
| 389 | static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); |
| 390 | static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); |
| 391 | static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2); |
| 392 | static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); |
| 393 | static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); |
| 394 | static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3); |
| 395 | static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); |
| 396 | static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); |
| 397 | static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4); |
| 398 | static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); |
| 399 | static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); |
| 400 | |
| 401 | static DEVICE_ATTR_RO(in5_input); |
| 402 | static DEVICE_ATTR_RW(in5_min); |
| 403 | static DEVICE_ATTR_RW(in5_max); |
| 404 | |
| 405 | /* Temperatures */ |
| 406 | static ssize_t temp1_input_show(struct device *dev, |
| 407 | struct device_attribute *attr, char *buf) |
| 408 | { |
| 409 | struct vt8231_data *data = vt8231_update_device(dev); |
| 410 | return sprintf(buf, "%d\n", data->temp[0] * 250); |
| 411 | } |
| 412 | |
| 413 | static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr, |
| 414 | char *buf) |
| 415 | { |
| 416 | struct vt8231_data *data = vt8231_update_device(dev); |
| 417 | return sprintf(buf, "%d\n", data->temp_max[0] * 1000); |
| 418 | } |
| 419 | |
| 420 | static ssize_t temp1_max_hyst_show(struct device *dev, |
| 421 | struct device_attribute *attr, char *buf) |
| 422 | { |
| 423 | struct vt8231_data *data = vt8231_update_device(dev); |
| 424 | return sprintf(buf, "%d\n", data->temp_min[0] * 1000); |
| 425 | } |
| 426 | |
| 427 | static ssize_t temp1_max_store(struct device *dev, |
| 428 | struct device_attribute *attr, const char *buf, |
| 429 | size_t count) |
| 430 | { |
| 431 | struct vt8231_data *data = dev_get_drvdata(dev); |
| 432 | long val; |
| 433 | int err; |
| 434 | |
| 435 | err = kstrtol(buf, 10, &val); |
| 436 | if (err) |
| 437 | return err; |
| 438 | |
| 439 | mutex_lock(&data->update_lock); |
| 440 | data->temp_max[0] = clamp_val((val + 500) / 1000, 0, 255); |
| 441 | vt8231_write_value(data, regtempmax[0], data->temp_max[0]); |
| 442 | mutex_unlock(&data->update_lock); |
| 443 | return count; |
| 444 | } |
| 445 | static ssize_t temp1_max_hyst_store(struct device *dev, |
| 446 | struct device_attribute *attr, |
| 447 | const char *buf, size_t count) |
| 448 | { |
| 449 | struct vt8231_data *data = dev_get_drvdata(dev); |
| 450 | long val; |
| 451 | int err; |
| 452 | |
| 453 | err = kstrtol(buf, 10, &val); |
| 454 | if (err) |
| 455 | return err; |
| 456 | |
| 457 | mutex_lock(&data->update_lock); |
| 458 | data->temp_min[0] = clamp_val((val + 500) / 1000, 0, 255); |
| 459 | vt8231_write_value(data, regtempmin[0], data->temp_min[0]); |
| 460 | mutex_unlock(&data->update_lock); |
| 461 | return count; |
| 462 | } |
| 463 | |
| 464 | static ssize_t temp_show(struct device *dev, struct device_attribute *attr, |
| 465 | char *buf) |
| 466 | { |
| 467 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| 468 | int nr = sensor_attr->index; |
| 469 | struct vt8231_data *data = vt8231_update_device(dev); |
| 470 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); |
| 471 | } |
| 472 | |
| 473 | static ssize_t temp_max_show(struct device *dev, |
| 474 | struct device_attribute *attr, char *buf) |
| 475 | { |
| 476 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| 477 | int nr = sensor_attr->index; |
| 478 | struct vt8231_data *data = vt8231_update_device(dev); |
| 479 | return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr])); |
| 480 | } |
| 481 | |
| 482 | static ssize_t temp_min_show(struct device *dev, |
| 483 | struct device_attribute *attr, char *buf) |
| 484 | { |
| 485 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| 486 | int nr = sensor_attr->index; |
| 487 | struct vt8231_data *data = vt8231_update_device(dev); |
| 488 | return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr])); |
| 489 | } |
| 490 | |
| 491 | static ssize_t temp_max_store(struct device *dev, |
| 492 | struct device_attribute *attr, const char *buf, |
| 493 | size_t count) |
| 494 | { |
| 495 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| 496 | int nr = sensor_attr->index; |
| 497 | struct vt8231_data *data = dev_get_drvdata(dev); |
| 498 | long val; |
| 499 | int err; |
| 500 | |
| 501 | err = kstrtol(buf, 10, &val); |
| 502 | if (err) |
| 503 | return err; |
| 504 | |
| 505 | mutex_lock(&data->update_lock); |
| 506 | data->temp_max[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255); |
| 507 | vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]); |
| 508 | mutex_unlock(&data->update_lock); |
| 509 | return count; |
| 510 | } |
| 511 | static ssize_t temp_min_store(struct device *dev, |
| 512 | struct device_attribute *attr, const char *buf, |
| 513 | size_t count) |
| 514 | { |
| 515 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| 516 | int nr = sensor_attr->index; |
| 517 | struct vt8231_data *data = dev_get_drvdata(dev); |
| 518 | long val; |
| 519 | int err; |
| 520 | |
| 521 | err = kstrtol(buf, 10, &val); |
| 522 | if (err) |
| 523 | return err; |
| 524 | |
| 525 | mutex_lock(&data->update_lock); |
| 526 | data->temp_min[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255); |
| 527 | vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]); |
| 528 | mutex_unlock(&data->update_lock); |
| 529 | return count; |
| 530 | } |
| 531 | |
| 532 | /* |
| 533 | * Note that these map the Linux temperature sensor numbering (1-6) to the VIA |
| 534 | * temperature sensor numbering (0-5) |
| 535 | */ |
| 536 | |
| 537 | static DEVICE_ATTR_RO(temp1_input); |
| 538 | static DEVICE_ATTR_RW(temp1_max); |
| 539 | static DEVICE_ATTR_RW(temp1_max_hyst); |
| 540 | |
| 541 | static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); |
| 542 | static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); |
| 543 | static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, temp_min, 1); |
| 544 | static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); |
| 545 | static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2); |
| 546 | static SENSOR_DEVICE_ATTR_RW(temp3_max_hyst, temp_min, 2); |
| 547 | static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3); |
| 548 | static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3); |
| 549 | static SENSOR_DEVICE_ATTR_RW(temp4_max_hyst, temp_min, 3); |
| 550 | static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4); |
| 551 | static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4); |
| 552 | static SENSOR_DEVICE_ATTR_RW(temp5_max_hyst, temp_min, 4); |
| 553 | static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5); |
| 554 | static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5); |
| 555 | static SENSOR_DEVICE_ATTR_RW(temp6_max_hyst, temp_min, 5); |
| 556 | |
| 557 | /* Fans */ |
| 558 | static ssize_t fan_show(struct device *dev, struct device_attribute *attr, |
| 559 | char *buf) |
| 560 | { |
| 561 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| 562 | int nr = sensor_attr->index; |
| 563 | struct vt8231_data *data = vt8231_update_device(dev); |
| 564 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], |
| 565 | DIV_FROM_REG(data->fan_div[nr]))); |
| 566 | } |
| 567 | |
| 568 | static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr, |
| 569 | char *buf) |
| 570 | { |
| 571 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| 572 | int nr = sensor_attr->index; |
| 573 | struct vt8231_data *data = vt8231_update_device(dev); |
| 574 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], |
| 575 | DIV_FROM_REG(data->fan_div[nr]))); |
| 576 | } |
| 577 | |
| 578 | static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr, |
| 579 | char *buf) |
| 580 | { |
| 581 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| 582 | int nr = sensor_attr->index; |
| 583 | struct vt8231_data *data = vt8231_update_device(dev); |
| 584 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); |
| 585 | } |
| 586 | |
| 587 | static ssize_t fan_min_store(struct device *dev, |
| 588 | struct device_attribute *attr, const char *buf, |
| 589 | size_t count) |
| 590 | { |
| 591 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| 592 | int nr = sensor_attr->index; |
| 593 | struct vt8231_data *data = dev_get_drvdata(dev); |
| 594 | unsigned long val; |
| 595 | int err; |
| 596 | |
| 597 | err = kstrtoul(buf, 10, &val); |
| 598 | if (err) |
| 599 | return err; |
| 600 | |
| 601 | mutex_lock(&data->update_lock); |
| 602 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
| 603 | vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); |
| 604 | mutex_unlock(&data->update_lock); |
| 605 | return count; |
| 606 | } |
| 607 | |
| 608 | static ssize_t fan_div_store(struct device *dev, |
| 609 | struct device_attribute *attr, const char *buf, |
| 610 | size_t count) |
| 611 | { |
| 612 | struct vt8231_data *data = dev_get_drvdata(dev); |
| 613 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| 614 | unsigned long val; |
| 615 | int nr = sensor_attr->index; |
| 616 | int old = vt8231_read_value(data, VT8231_REG_FANDIV); |
| 617 | long min = FAN_FROM_REG(data->fan_min[nr], |
| 618 | DIV_FROM_REG(data->fan_div[nr])); |
| 619 | int err; |
| 620 | |
| 621 | err = kstrtoul(buf, 10, &val); |
| 622 | if (err) |
| 623 | return err; |
| 624 | |
| 625 | mutex_lock(&data->update_lock); |
| 626 | switch (val) { |
| 627 | case 1: |
| 628 | data->fan_div[nr] = 0; |
| 629 | break; |
| 630 | case 2: |
| 631 | data->fan_div[nr] = 1; |
| 632 | break; |
| 633 | case 4: |
| 634 | data->fan_div[nr] = 2; |
| 635 | break; |
| 636 | case 8: |
| 637 | data->fan_div[nr] = 3; |
| 638 | break; |
| 639 | default: |
| 640 | dev_err(dev, |
| 641 | "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", |
| 642 | val); |
| 643 | mutex_unlock(&data->update_lock); |
| 644 | return -EINVAL; |
| 645 | } |
| 646 | |
| 647 | /* Correct the fan minimum speed */ |
| 648 | data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); |
| 649 | vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); |
| 650 | |
| 651 | old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); |
| 652 | vt8231_write_value(data, VT8231_REG_FANDIV, old); |
| 653 | mutex_unlock(&data->update_lock); |
| 654 | return count; |
| 655 | } |
| 656 | |
| 657 | static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); |
| 658 | static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); |
| 659 | static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); |
| 660 | static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); |
| 661 | static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); |
| 662 | static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); |
| 663 | |
| 664 | /* Alarms */ |
| 665 | static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, |
| 666 | char *buf) |
| 667 | { |
| 668 | struct vt8231_data *data = vt8231_update_device(dev); |
| 669 | return sprintf(buf, "%d\n", data->alarms); |
| 670 | } |
| 671 | static DEVICE_ATTR_RO(alarms); |
| 672 | |
| 673 | static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, |
| 674 | char *buf) |
| 675 | { |
| 676 | int bitnr = to_sensor_dev_attr(attr)->index; |
| 677 | struct vt8231_data *data = vt8231_update_device(dev); |
| 678 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); |
| 679 | } |
| 680 | static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4); |
| 681 | static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 11); |
| 682 | static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 0); |
| 683 | static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, 1); |
| 684 | static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, 3); |
| 685 | static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, 8); |
| 686 | static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 11); |
| 687 | static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 0); |
| 688 | static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 1); |
| 689 | static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); |
| 690 | static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8); |
| 691 | static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 2); |
| 692 | static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6); |
| 693 | static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7); |
| 694 | |
| 695 | static ssize_t name_show(struct device *dev, struct device_attribute |
| 696 | *devattr, char *buf) |
| 697 | { |
| 698 | struct vt8231_data *data = dev_get_drvdata(dev); |
| 699 | return sprintf(buf, "%s\n", data->name); |
| 700 | } |
| 701 | static DEVICE_ATTR_RO(name); |
| 702 | |
| 703 | static struct attribute *vt8231_attributes_temps[6][5] = { |
| 704 | { |
| 705 | &dev_attr_temp1_input.attr, |
| 706 | &dev_attr_temp1_max_hyst.attr, |
| 707 | &dev_attr_temp1_max.attr, |
| 708 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
| 709 | NULL |
| 710 | }, { |
| 711 | &sensor_dev_attr_temp2_input.dev_attr.attr, |
| 712 | &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, |
| 713 | &sensor_dev_attr_temp2_max.dev_attr.attr, |
| 714 | &sensor_dev_attr_temp2_alarm.dev_attr.attr, |
| 715 | NULL |
| 716 | }, { |
| 717 | &sensor_dev_attr_temp3_input.dev_attr.attr, |
| 718 | &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, |
| 719 | &sensor_dev_attr_temp3_max.dev_attr.attr, |
| 720 | &sensor_dev_attr_temp3_alarm.dev_attr.attr, |
| 721 | NULL |
| 722 | }, { |
| 723 | &sensor_dev_attr_temp4_input.dev_attr.attr, |
| 724 | &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, |
| 725 | &sensor_dev_attr_temp4_max.dev_attr.attr, |
| 726 | &sensor_dev_attr_temp4_alarm.dev_attr.attr, |
| 727 | NULL |
| 728 | }, { |
| 729 | &sensor_dev_attr_temp5_input.dev_attr.attr, |
| 730 | &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, |
| 731 | &sensor_dev_attr_temp5_max.dev_attr.attr, |
| 732 | &sensor_dev_attr_temp5_alarm.dev_attr.attr, |
| 733 | NULL |
| 734 | }, { |
| 735 | &sensor_dev_attr_temp6_input.dev_attr.attr, |
| 736 | &sensor_dev_attr_temp6_max_hyst.dev_attr.attr, |
| 737 | &sensor_dev_attr_temp6_max.dev_attr.attr, |
| 738 | &sensor_dev_attr_temp6_alarm.dev_attr.attr, |
| 739 | NULL |
| 740 | } |
| 741 | }; |
| 742 | |
| 743 | static const struct attribute_group vt8231_group_temps[6] = { |
| 744 | { .attrs = vt8231_attributes_temps[0] }, |
| 745 | { .attrs = vt8231_attributes_temps[1] }, |
| 746 | { .attrs = vt8231_attributes_temps[2] }, |
| 747 | { .attrs = vt8231_attributes_temps[3] }, |
| 748 | { .attrs = vt8231_attributes_temps[4] }, |
| 749 | { .attrs = vt8231_attributes_temps[5] }, |
| 750 | }; |
| 751 | |
| 752 | static struct attribute *vt8231_attributes_volts[6][5] = { |
| 753 | { |
| 754 | &sensor_dev_attr_in0_input.dev_attr.attr, |
| 755 | &sensor_dev_attr_in0_min.dev_attr.attr, |
| 756 | &sensor_dev_attr_in0_max.dev_attr.attr, |
| 757 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
| 758 | NULL |
| 759 | }, { |
| 760 | &sensor_dev_attr_in1_input.dev_attr.attr, |
| 761 | &sensor_dev_attr_in1_min.dev_attr.attr, |
| 762 | &sensor_dev_attr_in1_max.dev_attr.attr, |
| 763 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
| 764 | NULL |
| 765 | }, { |
| 766 | &sensor_dev_attr_in2_input.dev_attr.attr, |
| 767 | &sensor_dev_attr_in2_min.dev_attr.attr, |
| 768 | &sensor_dev_attr_in2_max.dev_attr.attr, |
| 769 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
| 770 | NULL |
| 771 | }, { |
| 772 | &sensor_dev_attr_in3_input.dev_attr.attr, |
| 773 | &sensor_dev_attr_in3_min.dev_attr.attr, |
| 774 | &sensor_dev_attr_in3_max.dev_attr.attr, |
| 775 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
| 776 | NULL |
| 777 | }, { |
| 778 | &sensor_dev_attr_in4_input.dev_attr.attr, |
| 779 | &sensor_dev_attr_in4_min.dev_attr.attr, |
| 780 | &sensor_dev_attr_in4_max.dev_attr.attr, |
| 781 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
| 782 | NULL |
| 783 | }, { |
| 784 | &dev_attr_in5_input.attr, |
| 785 | &dev_attr_in5_min.attr, |
| 786 | &dev_attr_in5_max.attr, |
| 787 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
| 788 | NULL |
| 789 | } |
| 790 | }; |
| 791 | |
| 792 | static const struct attribute_group vt8231_group_volts[6] = { |
| 793 | { .attrs = vt8231_attributes_volts[0] }, |
| 794 | { .attrs = vt8231_attributes_volts[1] }, |
| 795 | { .attrs = vt8231_attributes_volts[2] }, |
| 796 | { .attrs = vt8231_attributes_volts[3] }, |
| 797 | { .attrs = vt8231_attributes_volts[4] }, |
| 798 | { .attrs = vt8231_attributes_volts[5] }, |
| 799 | }; |
| 800 | |
| 801 | static struct attribute *vt8231_attributes[] = { |
| 802 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
| 803 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
| 804 | &sensor_dev_attr_fan1_min.dev_attr.attr, |
| 805 | &sensor_dev_attr_fan2_min.dev_attr.attr, |
| 806 | &sensor_dev_attr_fan1_div.dev_attr.attr, |
| 807 | &sensor_dev_attr_fan2_div.dev_attr.attr, |
| 808 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
| 809 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
| 810 | &dev_attr_alarms.attr, |
| 811 | &dev_attr_name.attr, |
| 812 | NULL |
| 813 | }; |
| 814 | |
| 815 | static const struct attribute_group vt8231_group = { |
| 816 | .attrs = vt8231_attributes, |
| 817 | }; |
| 818 | |
| 819 | static void vt8231_init_device(struct vt8231_data *data) |
| 820 | { |
| 821 | vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0); |
| 822 | vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0); |
| 823 | } |
| 824 | |
| 825 | static int vt8231_probe(struct platform_device *pdev) |
| 826 | { |
| 827 | struct resource *res; |
| 828 | struct vt8231_data *data; |
| 829 | int err = 0, i; |
| 830 | |
| 831 | /* Reserve the ISA region */ |
| 832 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
| 833 | if (!devm_request_region(&pdev->dev, res->start, VT8231_EXTENT, |
| 834 | DRIVER_NAME)) { |
| 835 | dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n", |
| 836 | (unsigned long)res->start, (unsigned long)res->end); |
| 837 | return -ENODEV; |
| 838 | } |
| 839 | |
| 840 | data = devm_kzalloc(&pdev->dev, sizeof(struct vt8231_data), GFP_KERNEL); |
| 841 | if (!data) |
| 842 | return -ENOMEM; |
| 843 | |
| 844 | platform_set_drvdata(pdev, data); |
| 845 | data->addr = res->start; |
| 846 | data->name = DRIVER_NAME; |
| 847 | |
| 848 | mutex_init(&data->update_lock); |
| 849 | vt8231_init_device(data); |
| 850 | |
| 851 | /* Register sysfs hooks */ |
| 852 | err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group); |
| 853 | if (err) |
| 854 | return err; |
| 855 | |
| 856 | /* Must update device information to find out the config field */ |
| 857 | data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG); |
| 858 | |
| 859 | for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) { |
| 860 | if (ISTEMP(i, data->uch_config)) { |
| 861 | err = sysfs_create_group(&pdev->dev.kobj, |
| 862 | &vt8231_group_temps[i]); |
| 863 | if (err) |
| 864 | goto exit_remove_files; |
| 865 | } |
| 866 | } |
| 867 | |
| 868 | for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) { |
| 869 | if (ISVOLT(i, data->uch_config)) { |
| 870 | err = sysfs_create_group(&pdev->dev.kobj, |
| 871 | &vt8231_group_volts[i]); |
| 872 | if (err) |
| 873 | goto exit_remove_files; |
| 874 | } |
| 875 | } |
| 876 | |
| 877 | data->hwmon_dev = hwmon_device_register(&pdev->dev); |
| 878 | if (IS_ERR(data->hwmon_dev)) { |
| 879 | err = PTR_ERR(data->hwmon_dev); |
| 880 | goto exit_remove_files; |
| 881 | } |
| 882 | return 0; |
| 883 | |
| 884 | exit_remove_files: |
| 885 | for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) |
| 886 | sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); |
| 887 | |
| 888 | for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) |
| 889 | sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); |
| 890 | |
| 891 | sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); |
| 892 | return err; |
| 893 | } |
| 894 | |
| 895 | static int vt8231_remove(struct platform_device *pdev) |
| 896 | { |
| 897 | struct vt8231_data *data = platform_get_drvdata(pdev); |
| 898 | int i; |
| 899 | |
| 900 | hwmon_device_unregister(data->hwmon_dev); |
| 901 | |
| 902 | for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) |
| 903 | sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); |
| 904 | |
| 905 | for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) |
| 906 | sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); |
| 907 | |
| 908 | sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); |
| 909 | |
| 910 | return 0; |
| 911 | } |
| 912 | |
| 913 | |
| 914 | static struct platform_driver vt8231_driver = { |
| 915 | .driver = { |
| 916 | .name = DRIVER_NAME, |
| 917 | }, |
| 918 | .probe = vt8231_probe, |
| 919 | .remove = vt8231_remove, |
| 920 | }; |
| 921 | |
| 922 | static const struct pci_device_id vt8231_pci_ids[] = { |
| 923 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) }, |
| 924 | { 0, } |
| 925 | }; |
| 926 | |
| 927 | MODULE_DEVICE_TABLE(pci, vt8231_pci_ids); |
| 928 | |
| 929 | static int vt8231_device_add(unsigned short address) |
| 930 | { |
| 931 | struct resource res = { |
| 932 | .start = address, |
| 933 | .end = address + VT8231_EXTENT - 1, |
| 934 | .name = DRIVER_NAME, |
| 935 | .flags = IORESOURCE_IO, |
| 936 | }; |
| 937 | int err; |
| 938 | |
| 939 | err = acpi_check_resource_conflict(&res); |
| 940 | if (err) |
| 941 | goto exit; |
| 942 | |
| 943 | pdev = platform_device_alloc(DRIVER_NAME, address); |
| 944 | if (!pdev) { |
| 945 | err = -ENOMEM; |
| 946 | pr_err("Device allocation failed\n"); |
| 947 | goto exit; |
| 948 | } |
| 949 | |
| 950 | err = platform_device_add_resources(pdev, &res, 1); |
| 951 | if (err) { |
| 952 | pr_err("Device resource addition failed (%d)\n", err); |
| 953 | goto exit_device_put; |
| 954 | } |
| 955 | |
| 956 | err = platform_device_add(pdev); |
| 957 | if (err) { |
| 958 | pr_err("Device addition failed (%d)\n", err); |
| 959 | goto exit_device_put; |
| 960 | } |
| 961 | |
| 962 | return 0; |
| 963 | |
| 964 | exit_device_put: |
| 965 | platform_device_put(pdev); |
| 966 | exit: |
| 967 | return err; |
| 968 | } |
| 969 | |
| 970 | static int vt8231_pci_probe(struct pci_dev *dev, |
| 971 | const struct pci_device_id *id) |
| 972 | { |
| 973 | u16 address, val; |
| 974 | int ret; |
| 975 | |
| 976 | if (force_addr) { |
| 977 | address = force_addr & 0xff00; |
| 978 | dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", |
| 979 | address); |
| 980 | |
| 981 | ret = pci_write_config_word(dev, VT8231_BASE_REG, address | 1); |
| 982 | if (ret != PCIBIOS_SUCCESSFUL) |
| 983 | return -ENODEV; |
| 984 | } |
| 985 | |
| 986 | pci_read_config_word(dev, VT8231_BASE_REG, &val); |
| 987 | if (val == (u16)~0) |
| 988 | return -ENODEV; |
| 989 | |
| 990 | address = val & ~(VT8231_EXTENT - 1); |
| 991 | if (address == 0) { |
| 992 | dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n"); |
| 993 | return -ENODEV; |
| 994 | } |
| 995 | |
| 996 | pci_read_config_word(dev, VT8231_ENABLE_REG, &val); |
| 997 | if (val == (u16)~0) |
| 998 | return -ENODEV; |
| 999 | |
| 1000 | if (!(val & 0x0001)) { |
| 1001 | dev_warn(&dev->dev, "enabling sensors\n"); |
| 1002 | ret = pci_write_config_word(dev, VT8231_ENABLE_REG, val | 0x1); |
| 1003 | if (ret != PCIBIOS_SUCCESSFUL) |
| 1004 | return -ENODEV; |
| 1005 | } |
| 1006 | |
| 1007 | if (platform_driver_register(&vt8231_driver)) |
| 1008 | goto exit; |
| 1009 | |
| 1010 | /* Sets global pdev as a side effect */ |
| 1011 | if (vt8231_device_add(address)) |
| 1012 | goto exit_unregister; |
| 1013 | |
| 1014 | /* |
| 1015 | * Always return failure here. This is to allow other drivers to bind |
| 1016 | * to this pci device. We don't really want to have control over the |
| 1017 | * pci device, we only wanted to read as few register values from it. |
| 1018 | */ |
| 1019 | |
| 1020 | /* |
| 1021 | * We do, however, mark ourselves as using the PCI device to stop it |
| 1022 | * getting unloaded. |
| 1023 | */ |
| 1024 | s_bridge = pci_dev_get(dev); |
| 1025 | return -ENODEV; |
| 1026 | |
| 1027 | exit_unregister: |
| 1028 | platform_driver_unregister(&vt8231_driver); |
| 1029 | exit: |
| 1030 | return -ENODEV; |
| 1031 | } |
| 1032 | |
| 1033 | static struct pci_driver vt8231_pci_driver = { |
| 1034 | .name = DRIVER_NAME, |
| 1035 | .id_table = vt8231_pci_ids, |
| 1036 | .probe = vt8231_pci_probe, |
| 1037 | }; |
| 1038 | |
| 1039 | static int __init sm_vt8231_init(void) |
| 1040 | { |
| 1041 | return pci_register_driver(&vt8231_pci_driver); |
| 1042 | } |
| 1043 | |
| 1044 | static void __exit sm_vt8231_exit(void) |
| 1045 | { |
| 1046 | pci_unregister_driver(&vt8231_pci_driver); |
| 1047 | if (s_bridge != NULL) { |
| 1048 | platform_device_unregister(pdev); |
| 1049 | platform_driver_unregister(&vt8231_driver); |
| 1050 | pci_dev_put(s_bridge); |
| 1051 | s_bridge = NULL; |
| 1052 | } |
| 1053 | } |
| 1054 | |
| 1055 | MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>"); |
| 1056 | MODULE_DESCRIPTION("VT8231 sensors"); |
| 1057 | MODULE_LICENSE("GPL"); |
| 1058 | |
| 1059 | module_init(sm_vt8231_init); |
| 1060 | module_exit(sm_vt8231_exit); |