| 1 | /* |
| 2 | lm78.c - Part of lm_sensors, Linux kernel modules for hardware |
| 3 | monitoring |
| 4 | Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> |
| 5 | Copyright (c) 2007 Jean Delvare <khali@linux-fr.org> |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | */ |
| 21 | |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/init.h> |
| 24 | #include <linux/slab.h> |
| 25 | #include <linux/jiffies.h> |
| 26 | #include <linux/i2c.h> |
| 27 | #include <linux/platform_device.h> |
| 28 | #include <linux/ioport.h> |
| 29 | #include <linux/hwmon.h> |
| 30 | #include <linux/hwmon-vid.h> |
| 31 | #include <linux/hwmon-sysfs.h> |
| 32 | #include <linux/err.h> |
| 33 | #include <linux/mutex.h> |
| 34 | #include <linux/io.h> |
| 35 | |
| 36 | /* ISA device, if found */ |
| 37 | static struct platform_device *pdev; |
| 38 | |
| 39 | /* Addresses to scan */ |
| 40 | static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, |
| 41 | 0x2e, 0x2f, I2C_CLIENT_END }; |
| 42 | static unsigned short isa_address = 0x290; |
| 43 | |
| 44 | /* Insmod parameters */ |
| 45 | I2C_CLIENT_INSMOD_2(lm78, lm79); |
| 46 | |
| 47 | /* Many LM78 constants specified below */ |
| 48 | |
| 49 | /* Length of ISA address segment */ |
| 50 | #define LM78_EXTENT 8 |
| 51 | |
| 52 | /* Where are the ISA address/data registers relative to the base address */ |
| 53 | #define LM78_ADDR_REG_OFFSET 5 |
| 54 | #define LM78_DATA_REG_OFFSET 6 |
| 55 | |
| 56 | /* The LM78 registers */ |
| 57 | #define LM78_REG_IN_MAX(nr) (0x2b + (nr) * 2) |
| 58 | #define LM78_REG_IN_MIN(nr) (0x2c + (nr) * 2) |
| 59 | #define LM78_REG_IN(nr) (0x20 + (nr)) |
| 60 | |
| 61 | #define LM78_REG_FAN_MIN(nr) (0x3b + (nr)) |
| 62 | #define LM78_REG_FAN(nr) (0x28 + (nr)) |
| 63 | |
| 64 | #define LM78_REG_TEMP 0x27 |
| 65 | #define LM78_REG_TEMP_OVER 0x39 |
| 66 | #define LM78_REG_TEMP_HYST 0x3a |
| 67 | |
| 68 | #define LM78_REG_ALARM1 0x41 |
| 69 | #define LM78_REG_ALARM2 0x42 |
| 70 | |
| 71 | #define LM78_REG_VID_FANDIV 0x47 |
| 72 | |
| 73 | #define LM78_REG_CONFIG 0x40 |
| 74 | #define LM78_REG_CHIPID 0x49 |
| 75 | #define LM78_REG_I2C_ADDR 0x48 |
| 76 | |
| 77 | |
| 78 | /* Conversions. Rounding and limit checking is only done on the TO_REG |
| 79 | variants. */ |
| 80 | |
| 81 | /* IN: mV, (0V to 4.08V) |
| 82 | REG: 16mV/bit */ |
| 83 | static inline u8 IN_TO_REG(unsigned long val) |
| 84 | { |
| 85 | unsigned long nval = SENSORS_LIMIT(val, 0, 4080); |
| 86 | return (nval + 8) / 16; |
| 87 | } |
| 88 | #define IN_FROM_REG(val) ((val) * 16) |
| 89 | |
| 90 | static inline u8 FAN_TO_REG(long rpm, int div) |
| 91 | { |
| 92 | if (rpm <= 0) |
| 93 | return 255; |
| 94 | return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254); |
| 95 | } |
| 96 | |
| 97 | static inline int FAN_FROM_REG(u8 val, int div) |
| 98 | { |
| 99 | return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div); |
| 100 | } |
| 101 | |
| 102 | /* TEMP: mC (-128C to +127C) |
| 103 | REG: 1C/bit, two's complement */ |
| 104 | static inline s8 TEMP_TO_REG(int val) |
| 105 | { |
| 106 | int nval = SENSORS_LIMIT(val, -128000, 127000) ; |
| 107 | return nval<0 ? (nval-500)/1000 : (nval+500)/1000; |
| 108 | } |
| 109 | |
| 110 | static inline int TEMP_FROM_REG(s8 val) |
| 111 | { |
| 112 | return val * 1000; |
| 113 | } |
| 114 | |
| 115 | #define DIV_FROM_REG(val) (1 << (val)) |
| 116 | |
| 117 | struct lm78_data { |
| 118 | struct i2c_client *client; |
| 119 | struct device *hwmon_dev; |
| 120 | struct mutex lock; |
| 121 | enum chips type; |
| 122 | |
| 123 | /* For ISA device only */ |
| 124 | const char *name; |
| 125 | int isa_addr; |
| 126 | |
| 127 | struct mutex update_lock; |
| 128 | char valid; /* !=0 if following fields are valid */ |
| 129 | unsigned long last_updated; /* In jiffies */ |
| 130 | |
| 131 | u8 in[7]; /* Register value */ |
| 132 | u8 in_max[7]; /* Register value */ |
| 133 | u8 in_min[7]; /* Register value */ |
| 134 | u8 fan[3]; /* Register value */ |
| 135 | u8 fan_min[3]; /* Register value */ |
| 136 | s8 temp; /* Register value */ |
| 137 | s8 temp_over; /* Register value */ |
| 138 | s8 temp_hyst; /* Register value */ |
| 139 | u8 fan_div[3]; /* Register encoding, shifted right */ |
| 140 | u8 vid; /* Register encoding, combined */ |
| 141 | u16 alarms; /* Register encoding, combined */ |
| 142 | }; |
| 143 | |
| 144 | |
| 145 | static int lm78_i2c_detect(struct i2c_client *client, int kind, |
| 146 | struct i2c_board_info *info); |
| 147 | static int lm78_i2c_probe(struct i2c_client *client, |
| 148 | const struct i2c_device_id *id); |
| 149 | static int lm78_i2c_remove(struct i2c_client *client); |
| 150 | |
| 151 | static int __devinit lm78_isa_probe(struct platform_device *pdev); |
| 152 | static int __devexit lm78_isa_remove(struct platform_device *pdev); |
| 153 | |
| 154 | static int lm78_read_value(struct lm78_data *data, u8 reg); |
| 155 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value); |
| 156 | static struct lm78_data *lm78_update_device(struct device *dev); |
| 157 | static void lm78_init_device(struct lm78_data *data); |
| 158 | |
| 159 | |
| 160 | static const struct i2c_device_id lm78_i2c_id[] = { |
| 161 | { "lm78", lm78 }, |
| 162 | { "lm79", lm79 }, |
| 163 | { } |
| 164 | }; |
| 165 | MODULE_DEVICE_TABLE(i2c, lm78_i2c_id); |
| 166 | |
| 167 | static struct i2c_driver lm78_driver = { |
| 168 | .class = I2C_CLASS_HWMON, |
| 169 | .driver = { |
| 170 | .name = "lm78", |
| 171 | }, |
| 172 | .probe = lm78_i2c_probe, |
| 173 | .remove = lm78_i2c_remove, |
| 174 | .id_table = lm78_i2c_id, |
| 175 | .detect = lm78_i2c_detect, |
| 176 | .address_data = &addr_data, |
| 177 | }; |
| 178 | |
| 179 | static struct platform_driver lm78_isa_driver = { |
| 180 | .driver = { |
| 181 | .owner = THIS_MODULE, |
| 182 | .name = "lm78", |
| 183 | }, |
| 184 | .probe = lm78_isa_probe, |
| 185 | .remove = __devexit_p(lm78_isa_remove), |
| 186 | }; |
| 187 | |
| 188 | |
| 189 | /* 7 Voltages */ |
| 190 | static ssize_t show_in(struct device *dev, struct device_attribute *da, |
| 191 | char *buf) |
| 192 | { |
| 193 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 194 | struct lm78_data *data = lm78_update_device(dev); |
| 195 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index])); |
| 196 | } |
| 197 | |
| 198 | static ssize_t show_in_min(struct device *dev, struct device_attribute *da, |
| 199 | char *buf) |
| 200 | { |
| 201 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 202 | struct lm78_data *data = lm78_update_device(dev); |
| 203 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index])); |
| 204 | } |
| 205 | |
| 206 | static ssize_t show_in_max(struct device *dev, struct device_attribute *da, |
| 207 | char *buf) |
| 208 | { |
| 209 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 210 | struct lm78_data *data = lm78_update_device(dev); |
| 211 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index])); |
| 212 | } |
| 213 | |
| 214 | static ssize_t set_in_min(struct device *dev, struct device_attribute *da, |
| 215 | const char *buf, size_t count) |
| 216 | { |
| 217 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 218 | struct lm78_data *data = dev_get_drvdata(dev); |
| 219 | unsigned long val = simple_strtoul(buf, NULL, 10); |
| 220 | int nr = attr->index; |
| 221 | |
| 222 | mutex_lock(&data->update_lock); |
| 223 | data->in_min[nr] = IN_TO_REG(val); |
| 224 | lm78_write_value(data, LM78_REG_IN_MIN(nr), data->in_min[nr]); |
| 225 | mutex_unlock(&data->update_lock); |
| 226 | return count; |
| 227 | } |
| 228 | |
| 229 | static ssize_t set_in_max(struct device *dev, struct device_attribute *da, |
| 230 | const char *buf, size_t count) |
| 231 | { |
| 232 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 233 | struct lm78_data *data = dev_get_drvdata(dev); |
| 234 | unsigned long val = simple_strtoul(buf, NULL, 10); |
| 235 | int nr = attr->index; |
| 236 | |
| 237 | mutex_lock(&data->update_lock); |
| 238 | data->in_max[nr] = IN_TO_REG(val); |
| 239 | lm78_write_value(data, LM78_REG_IN_MAX(nr), data->in_max[nr]); |
| 240 | mutex_unlock(&data->update_lock); |
| 241 | return count; |
| 242 | } |
| 243 | |
| 244 | #define show_in_offset(offset) \ |
| 245 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ |
| 246 | show_in, NULL, offset); \ |
| 247 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ |
| 248 | show_in_min, set_in_min, offset); \ |
| 249 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ |
| 250 | show_in_max, set_in_max, offset); |
| 251 | |
| 252 | show_in_offset(0); |
| 253 | show_in_offset(1); |
| 254 | show_in_offset(2); |
| 255 | show_in_offset(3); |
| 256 | show_in_offset(4); |
| 257 | show_in_offset(5); |
| 258 | show_in_offset(6); |
| 259 | |
| 260 | /* Temperature */ |
| 261 | static ssize_t show_temp(struct device *dev, struct device_attribute *da, |
| 262 | char *buf) |
| 263 | { |
| 264 | struct lm78_data *data = lm78_update_device(dev); |
| 265 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp)); |
| 266 | } |
| 267 | |
| 268 | static ssize_t show_temp_over(struct device *dev, struct device_attribute *da, |
| 269 | char *buf) |
| 270 | { |
| 271 | struct lm78_data *data = lm78_update_device(dev); |
| 272 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over)); |
| 273 | } |
| 274 | |
| 275 | static ssize_t set_temp_over(struct device *dev, struct device_attribute *da, |
| 276 | const char *buf, size_t count) |
| 277 | { |
| 278 | struct lm78_data *data = dev_get_drvdata(dev); |
| 279 | long val = simple_strtol(buf, NULL, 10); |
| 280 | |
| 281 | mutex_lock(&data->update_lock); |
| 282 | data->temp_over = TEMP_TO_REG(val); |
| 283 | lm78_write_value(data, LM78_REG_TEMP_OVER, data->temp_over); |
| 284 | mutex_unlock(&data->update_lock); |
| 285 | return count; |
| 286 | } |
| 287 | |
| 288 | static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *da, |
| 289 | char *buf) |
| 290 | { |
| 291 | struct lm78_data *data = lm78_update_device(dev); |
| 292 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst)); |
| 293 | } |
| 294 | |
| 295 | static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *da, |
| 296 | const char *buf, size_t count) |
| 297 | { |
| 298 | struct lm78_data *data = dev_get_drvdata(dev); |
| 299 | long val = simple_strtol(buf, NULL, 10); |
| 300 | |
| 301 | mutex_lock(&data->update_lock); |
| 302 | data->temp_hyst = TEMP_TO_REG(val); |
| 303 | lm78_write_value(data, LM78_REG_TEMP_HYST, data->temp_hyst); |
| 304 | mutex_unlock(&data->update_lock); |
| 305 | return count; |
| 306 | } |
| 307 | |
| 308 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); |
| 309 | static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, |
| 310 | show_temp_over, set_temp_over); |
| 311 | static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, |
| 312 | show_temp_hyst, set_temp_hyst); |
| 313 | |
| 314 | /* 3 Fans */ |
| 315 | static ssize_t show_fan(struct device *dev, struct device_attribute *da, |
| 316 | char *buf) |
| 317 | { |
| 318 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 319 | struct lm78_data *data = lm78_update_device(dev); |
| 320 | int nr = attr->index; |
| 321 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], |
| 322 | DIV_FROM_REG(data->fan_div[nr])) ); |
| 323 | } |
| 324 | |
| 325 | static ssize_t show_fan_min(struct device *dev, struct device_attribute *da, |
| 326 | char *buf) |
| 327 | { |
| 328 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 329 | struct lm78_data *data = lm78_update_device(dev); |
| 330 | int nr = attr->index; |
| 331 | return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan_min[nr], |
| 332 | DIV_FROM_REG(data->fan_div[nr])) ); |
| 333 | } |
| 334 | |
| 335 | static ssize_t set_fan_min(struct device *dev, struct device_attribute *da, |
| 336 | const char *buf, size_t count) |
| 337 | { |
| 338 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 339 | struct lm78_data *data = dev_get_drvdata(dev); |
| 340 | int nr = attr->index; |
| 341 | unsigned long val = simple_strtoul(buf, NULL, 10); |
| 342 | |
| 343 | mutex_lock(&data->update_lock); |
| 344 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
| 345 | lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); |
| 346 | mutex_unlock(&data->update_lock); |
| 347 | return count; |
| 348 | } |
| 349 | |
| 350 | static ssize_t show_fan_div(struct device *dev, struct device_attribute *da, |
| 351 | char *buf) |
| 352 | { |
| 353 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 354 | struct lm78_data *data = lm78_update_device(dev); |
| 355 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index])); |
| 356 | } |
| 357 | |
| 358 | /* Note: we save and restore the fan minimum here, because its value is |
| 359 | determined in part by the fan divisor. This follows the principle of |
| 360 | least surprise; the user doesn't expect the fan minimum to change just |
| 361 | because the divisor changed. */ |
| 362 | static ssize_t set_fan_div(struct device *dev, struct device_attribute *da, |
| 363 | const char *buf, size_t count) |
| 364 | { |
| 365 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 366 | struct lm78_data *data = dev_get_drvdata(dev); |
| 367 | int nr = attr->index; |
| 368 | unsigned long val = simple_strtoul(buf, NULL, 10); |
| 369 | unsigned long min; |
| 370 | u8 reg; |
| 371 | |
| 372 | mutex_lock(&data->update_lock); |
| 373 | min = FAN_FROM_REG(data->fan_min[nr], |
| 374 | DIV_FROM_REG(data->fan_div[nr])); |
| 375 | |
| 376 | switch (val) { |
| 377 | case 1: data->fan_div[nr] = 0; break; |
| 378 | case 2: data->fan_div[nr] = 1; break; |
| 379 | case 4: data->fan_div[nr] = 2; break; |
| 380 | case 8: data->fan_div[nr] = 3; break; |
| 381 | default: |
| 382 | dev_err(dev, "fan_div value %ld not " |
| 383 | "supported. Choose one of 1, 2, 4 or 8!\n", val); |
| 384 | mutex_unlock(&data->update_lock); |
| 385 | return -EINVAL; |
| 386 | } |
| 387 | |
| 388 | reg = lm78_read_value(data, LM78_REG_VID_FANDIV); |
| 389 | switch (nr) { |
| 390 | case 0: |
| 391 | reg = (reg & 0xcf) | (data->fan_div[nr] << 4); |
| 392 | break; |
| 393 | case 1: |
| 394 | reg = (reg & 0x3f) | (data->fan_div[nr] << 6); |
| 395 | break; |
| 396 | } |
| 397 | lm78_write_value(data, LM78_REG_VID_FANDIV, reg); |
| 398 | |
| 399 | data->fan_min[nr] = |
| 400 | FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); |
| 401 | lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); |
| 402 | mutex_unlock(&data->update_lock); |
| 403 | |
| 404 | return count; |
| 405 | } |
| 406 | |
| 407 | #define show_fan_offset(offset) \ |
| 408 | static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ |
| 409 | show_fan, NULL, offset - 1); \ |
| 410 | static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ |
| 411 | show_fan_min, set_fan_min, offset - 1); |
| 412 | |
| 413 | show_fan_offset(1); |
| 414 | show_fan_offset(2); |
| 415 | show_fan_offset(3); |
| 416 | |
| 417 | /* Fan 3 divisor is locked in H/W */ |
| 418 | static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, |
| 419 | show_fan_div, set_fan_div, 0); |
| 420 | static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, |
| 421 | show_fan_div, set_fan_div, 1); |
| 422 | static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO, show_fan_div, NULL, 2); |
| 423 | |
| 424 | /* VID */ |
| 425 | static ssize_t show_vid(struct device *dev, struct device_attribute *da, |
| 426 | char *buf) |
| 427 | { |
| 428 | struct lm78_data *data = lm78_update_device(dev); |
| 429 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, 82)); |
| 430 | } |
| 431 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); |
| 432 | |
| 433 | /* Alarms */ |
| 434 | static ssize_t show_alarms(struct device *dev, struct device_attribute *da, |
| 435 | char *buf) |
| 436 | { |
| 437 | struct lm78_data *data = lm78_update_device(dev); |
| 438 | return sprintf(buf, "%u\n", data->alarms); |
| 439 | } |
| 440 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
| 441 | |
| 442 | static ssize_t show_alarm(struct device *dev, struct device_attribute *da, |
| 443 | char *buf) |
| 444 | { |
| 445 | struct lm78_data *data = lm78_update_device(dev); |
| 446 | int nr = to_sensor_dev_attr(da)->index; |
| 447 | return sprintf(buf, "%u\n", (data->alarms >> nr) & 1); |
| 448 | } |
| 449 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); |
| 450 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); |
| 451 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); |
| 452 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); |
| 453 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); |
| 454 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); |
| 455 | static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10); |
| 456 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); |
| 457 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); |
| 458 | static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11); |
| 459 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); |
| 460 | |
| 461 | static struct attribute *lm78_attributes[] = { |
| 462 | &sensor_dev_attr_in0_input.dev_attr.attr, |
| 463 | &sensor_dev_attr_in0_min.dev_attr.attr, |
| 464 | &sensor_dev_attr_in0_max.dev_attr.attr, |
| 465 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
| 466 | &sensor_dev_attr_in1_input.dev_attr.attr, |
| 467 | &sensor_dev_attr_in1_min.dev_attr.attr, |
| 468 | &sensor_dev_attr_in1_max.dev_attr.attr, |
| 469 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
| 470 | &sensor_dev_attr_in2_input.dev_attr.attr, |
| 471 | &sensor_dev_attr_in2_min.dev_attr.attr, |
| 472 | &sensor_dev_attr_in2_max.dev_attr.attr, |
| 473 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
| 474 | &sensor_dev_attr_in3_input.dev_attr.attr, |
| 475 | &sensor_dev_attr_in3_min.dev_attr.attr, |
| 476 | &sensor_dev_attr_in3_max.dev_attr.attr, |
| 477 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
| 478 | &sensor_dev_attr_in4_input.dev_attr.attr, |
| 479 | &sensor_dev_attr_in4_min.dev_attr.attr, |
| 480 | &sensor_dev_attr_in4_max.dev_attr.attr, |
| 481 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
| 482 | &sensor_dev_attr_in5_input.dev_attr.attr, |
| 483 | &sensor_dev_attr_in5_min.dev_attr.attr, |
| 484 | &sensor_dev_attr_in5_max.dev_attr.attr, |
| 485 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
| 486 | &sensor_dev_attr_in6_input.dev_attr.attr, |
| 487 | &sensor_dev_attr_in6_min.dev_attr.attr, |
| 488 | &sensor_dev_attr_in6_max.dev_attr.attr, |
| 489 | &sensor_dev_attr_in6_alarm.dev_attr.attr, |
| 490 | &dev_attr_temp1_input.attr, |
| 491 | &dev_attr_temp1_max.attr, |
| 492 | &dev_attr_temp1_max_hyst.attr, |
| 493 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
| 494 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
| 495 | &sensor_dev_attr_fan1_min.dev_attr.attr, |
| 496 | &sensor_dev_attr_fan1_div.dev_attr.attr, |
| 497 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
| 498 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
| 499 | &sensor_dev_attr_fan2_min.dev_attr.attr, |
| 500 | &sensor_dev_attr_fan2_div.dev_attr.attr, |
| 501 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
| 502 | &sensor_dev_attr_fan3_input.dev_attr.attr, |
| 503 | &sensor_dev_attr_fan3_min.dev_attr.attr, |
| 504 | &sensor_dev_attr_fan3_div.dev_attr.attr, |
| 505 | &sensor_dev_attr_fan3_alarm.dev_attr.attr, |
| 506 | &dev_attr_alarms.attr, |
| 507 | &dev_attr_cpu0_vid.attr, |
| 508 | |
| 509 | NULL |
| 510 | }; |
| 511 | |
| 512 | static const struct attribute_group lm78_group = { |
| 513 | .attrs = lm78_attributes, |
| 514 | }; |
| 515 | |
| 516 | /* I2C devices get this name attribute automatically, but for ISA devices |
| 517 | we must create it by ourselves. */ |
| 518 | static ssize_t show_name(struct device *dev, struct device_attribute |
| 519 | *devattr, char *buf) |
| 520 | { |
| 521 | struct lm78_data *data = dev_get_drvdata(dev); |
| 522 | |
| 523 | return sprintf(buf, "%s\n", data->name); |
| 524 | } |
| 525 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); |
| 526 | |
| 527 | /* Returns 1 if the I2C chip appears to be an alias of the ISA chip */ |
| 528 | static int lm78_alias_detect(struct i2c_client *client, u8 chipid) |
| 529 | { |
| 530 | struct lm78_data *isa; |
| 531 | int i; |
| 532 | |
| 533 | if (!pdev) /* No ISA chip */ |
| 534 | return 0; |
| 535 | isa = platform_get_drvdata(pdev); |
| 536 | |
| 537 | if (lm78_read_value(isa, LM78_REG_I2C_ADDR) != client->addr) |
| 538 | return 0; /* Address doesn't match */ |
| 539 | if ((lm78_read_value(isa, LM78_REG_CHIPID) & 0xfe) != (chipid & 0xfe)) |
| 540 | return 0; /* Chip type doesn't match */ |
| 541 | |
| 542 | /* We compare all the limit registers, the config register and the |
| 543 | * interrupt mask registers */ |
| 544 | for (i = 0x2b; i <= 0x3d; i++) { |
| 545 | if (lm78_read_value(isa, i) != |
| 546 | i2c_smbus_read_byte_data(client, i)) |
| 547 | return 0; |
| 548 | } |
| 549 | if (lm78_read_value(isa, LM78_REG_CONFIG) != |
| 550 | i2c_smbus_read_byte_data(client, LM78_REG_CONFIG)) |
| 551 | return 0; |
| 552 | for (i = 0x43; i <= 0x46; i++) { |
| 553 | if (lm78_read_value(isa, i) != |
| 554 | i2c_smbus_read_byte_data(client, i)) |
| 555 | return 0; |
| 556 | } |
| 557 | |
| 558 | return 1; |
| 559 | } |
| 560 | |
| 561 | static int lm78_i2c_detect(struct i2c_client *client, int kind, |
| 562 | struct i2c_board_info *info) |
| 563 | { |
| 564 | int i; |
| 565 | struct lm78_data *isa = pdev ? platform_get_drvdata(pdev) : NULL; |
| 566 | const char *client_name; |
| 567 | struct i2c_adapter *adapter = client->adapter; |
| 568 | int address = client->addr; |
| 569 | |
| 570 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
| 571 | return -ENODEV; |
| 572 | |
| 573 | /* We block updates of the ISA device to minimize the risk of |
| 574 | concurrent access to the same LM78 chip through different |
| 575 | interfaces. */ |
| 576 | if (isa) |
| 577 | mutex_lock(&isa->update_lock); |
| 578 | |
| 579 | if (kind < 0) { |
| 580 | if ((i2c_smbus_read_byte_data(client, LM78_REG_CONFIG) & 0x80) |
| 581 | || i2c_smbus_read_byte_data(client, LM78_REG_I2C_ADDR) |
| 582 | != address) |
| 583 | goto err_nodev; |
| 584 | |
| 585 | /* Explicitly prevent the misdetection of Winbond chips */ |
| 586 | i = i2c_smbus_read_byte_data(client, 0x4f); |
| 587 | if (i == 0xa3 || i == 0x5c) |
| 588 | goto err_nodev; |
| 589 | } |
| 590 | |
| 591 | /* Determine the chip type. */ |
| 592 | if (kind <= 0) { |
| 593 | i = i2c_smbus_read_byte_data(client, LM78_REG_CHIPID); |
| 594 | if (i == 0x00 || i == 0x20 /* LM78 */ |
| 595 | || i == 0x40) /* LM78-J */ |
| 596 | kind = lm78; |
| 597 | else if ((i & 0xfe) == 0xc0) |
| 598 | kind = lm79; |
| 599 | else { |
| 600 | if (kind == 0) |
| 601 | dev_warn(&adapter->dev, "Ignoring 'force' " |
| 602 | "parameter for unknown chip at " |
| 603 | "adapter %d, address 0x%02x\n", |
| 604 | i2c_adapter_id(adapter), address); |
| 605 | goto err_nodev; |
| 606 | } |
| 607 | |
| 608 | if (lm78_alias_detect(client, i)) { |
| 609 | dev_dbg(&adapter->dev, "Device at 0x%02x appears to " |
| 610 | "be the same as ISA device\n", address); |
| 611 | goto err_nodev; |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | if (isa) |
| 616 | mutex_unlock(&isa->update_lock); |
| 617 | |
| 618 | switch (kind) { |
| 619 | case lm79: |
| 620 | client_name = "lm79"; |
| 621 | break; |
| 622 | default: |
| 623 | client_name = "lm78"; |
| 624 | } |
| 625 | strlcpy(info->type, client_name, I2C_NAME_SIZE); |
| 626 | |
| 627 | return 0; |
| 628 | |
| 629 | err_nodev: |
| 630 | if (isa) |
| 631 | mutex_unlock(&isa->update_lock); |
| 632 | return -ENODEV; |
| 633 | } |
| 634 | |
| 635 | static int lm78_i2c_probe(struct i2c_client *client, |
| 636 | const struct i2c_device_id *id) |
| 637 | { |
| 638 | struct lm78_data *data; |
| 639 | int err; |
| 640 | |
| 641 | data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL); |
| 642 | if (!data) |
| 643 | return -ENOMEM; |
| 644 | |
| 645 | i2c_set_clientdata(client, data); |
| 646 | data->client = client; |
| 647 | data->type = id->driver_data; |
| 648 | |
| 649 | /* Initialize the LM78 chip */ |
| 650 | lm78_init_device(data); |
| 651 | |
| 652 | /* Register sysfs hooks */ |
| 653 | err = sysfs_create_group(&client->dev.kobj, &lm78_group); |
| 654 | if (err) |
| 655 | goto ERROR3; |
| 656 | |
| 657 | data->hwmon_dev = hwmon_device_register(&client->dev); |
| 658 | if (IS_ERR(data->hwmon_dev)) { |
| 659 | err = PTR_ERR(data->hwmon_dev); |
| 660 | goto ERROR4; |
| 661 | } |
| 662 | |
| 663 | return 0; |
| 664 | |
| 665 | ERROR4: |
| 666 | sysfs_remove_group(&client->dev.kobj, &lm78_group); |
| 667 | ERROR3: |
| 668 | kfree(data); |
| 669 | return err; |
| 670 | } |
| 671 | |
| 672 | static int lm78_i2c_remove(struct i2c_client *client) |
| 673 | { |
| 674 | struct lm78_data *data = i2c_get_clientdata(client); |
| 675 | |
| 676 | hwmon_device_unregister(data->hwmon_dev); |
| 677 | sysfs_remove_group(&client->dev.kobj, &lm78_group); |
| 678 | kfree(data); |
| 679 | |
| 680 | return 0; |
| 681 | } |
| 682 | |
| 683 | static int __devinit lm78_isa_probe(struct platform_device *pdev) |
| 684 | { |
| 685 | int err; |
| 686 | struct lm78_data *data; |
| 687 | struct resource *res; |
| 688 | |
| 689 | /* Reserve the ISA region */ |
| 690 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
| 691 | if (!request_region(res->start + LM78_ADDR_REG_OFFSET, 2, "lm78")) { |
| 692 | err = -EBUSY; |
| 693 | goto exit; |
| 694 | } |
| 695 | |
| 696 | if (!(data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL))) { |
| 697 | err = -ENOMEM; |
| 698 | goto exit_release_region; |
| 699 | } |
| 700 | mutex_init(&data->lock); |
| 701 | data->isa_addr = res->start; |
| 702 | platform_set_drvdata(pdev, data); |
| 703 | |
| 704 | if (lm78_read_value(data, LM78_REG_CHIPID) & 0x80) { |
| 705 | data->type = lm79; |
| 706 | data->name = "lm79"; |
| 707 | } else { |
| 708 | data->type = lm78; |
| 709 | data->name = "lm78"; |
| 710 | } |
| 711 | |
| 712 | /* Initialize the LM78 chip */ |
| 713 | lm78_init_device(data); |
| 714 | |
| 715 | /* Register sysfs hooks */ |
| 716 | if ((err = sysfs_create_group(&pdev->dev.kobj, &lm78_group)) |
| 717 | || (err = device_create_file(&pdev->dev, &dev_attr_name))) |
| 718 | goto exit_remove_files; |
| 719 | |
| 720 | data->hwmon_dev = hwmon_device_register(&pdev->dev); |
| 721 | if (IS_ERR(data->hwmon_dev)) { |
| 722 | err = PTR_ERR(data->hwmon_dev); |
| 723 | goto exit_remove_files; |
| 724 | } |
| 725 | |
| 726 | return 0; |
| 727 | |
| 728 | exit_remove_files: |
| 729 | sysfs_remove_group(&pdev->dev.kobj, &lm78_group); |
| 730 | device_remove_file(&pdev->dev, &dev_attr_name); |
| 731 | kfree(data); |
| 732 | exit_release_region: |
| 733 | release_region(res->start + LM78_ADDR_REG_OFFSET, 2); |
| 734 | exit: |
| 735 | return err; |
| 736 | } |
| 737 | |
| 738 | static int __devexit lm78_isa_remove(struct platform_device *pdev) |
| 739 | { |
| 740 | struct lm78_data *data = platform_get_drvdata(pdev); |
| 741 | struct resource *res; |
| 742 | |
| 743 | hwmon_device_unregister(data->hwmon_dev); |
| 744 | sysfs_remove_group(&pdev->dev.kobj, &lm78_group); |
| 745 | device_remove_file(&pdev->dev, &dev_attr_name); |
| 746 | kfree(data); |
| 747 | |
| 748 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
| 749 | release_region(res->start + LM78_ADDR_REG_OFFSET, 2); |
| 750 | |
| 751 | return 0; |
| 752 | } |
| 753 | |
| 754 | /* The SMBus locks itself, but ISA access must be locked explicitly! |
| 755 | We don't want to lock the whole ISA bus, so we lock each client |
| 756 | separately. |
| 757 | We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, |
| 758 | would slow down the LM78 access and should not be necessary. */ |
| 759 | static int lm78_read_value(struct lm78_data *data, u8 reg) |
| 760 | { |
| 761 | struct i2c_client *client = data->client; |
| 762 | |
| 763 | if (!client) { /* ISA device */ |
| 764 | int res; |
| 765 | mutex_lock(&data->lock); |
| 766 | outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET); |
| 767 | res = inb_p(data->isa_addr + LM78_DATA_REG_OFFSET); |
| 768 | mutex_unlock(&data->lock); |
| 769 | return res; |
| 770 | } else |
| 771 | return i2c_smbus_read_byte_data(client, reg); |
| 772 | } |
| 773 | |
| 774 | /* The SMBus locks itself, but ISA access muse be locked explicitly! |
| 775 | We don't want to lock the whole ISA bus, so we lock each client |
| 776 | separately. |
| 777 | We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, |
| 778 | would slow down the LM78 access and should not be necessary. |
| 779 | There are some ugly typecasts here, but the good new is - they should |
| 780 | nowhere else be necessary! */ |
| 781 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value) |
| 782 | { |
| 783 | struct i2c_client *client = data->client; |
| 784 | |
| 785 | if (!client) { /* ISA device */ |
| 786 | mutex_lock(&data->lock); |
| 787 | outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET); |
| 788 | outb_p(value, data->isa_addr + LM78_DATA_REG_OFFSET); |
| 789 | mutex_unlock(&data->lock); |
| 790 | return 0; |
| 791 | } else |
| 792 | return i2c_smbus_write_byte_data(client, reg, value); |
| 793 | } |
| 794 | |
| 795 | static void lm78_init_device(struct lm78_data *data) |
| 796 | { |
| 797 | u8 config; |
| 798 | int i; |
| 799 | |
| 800 | /* Start monitoring */ |
| 801 | config = lm78_read_value(data, LM78_REG_CONFIG); |
| 802 | if ((config & 0x09) != 0x01) |
| 803 | lm78_write_value(data, LM78_REG_CONFIG, |
| 804 | (config & 0xf7) | 0x01); |
| 805 | |
| 806 | /* A few vars need to be filled upon startup */ |
| 807 | for (i = 0; i < 3; i++) { |
| 808 | data->fan_min[i] = lm78_read_value(data, |
| 809 | LM78_REG_FAN_MIN(i)); |
| 810 | } |
| 811 | |
| 812 | mutex_init(&data->update_lock); |
| 813 | } |
| 814 | |
| 815 | static struct lm78_data *lm78_update_device(struct device *dev) |
| 816 | { |
| 817 | struct lm78_data *data = dev_get_drvdata(dev); |
| 818 | int i; |
| 819 | |
| 820 | mutex_lock(&data->update_lock); |
| 821 | |
| 822 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) |
| 823 | || !data->valid) { |
| 824 | |
| 825 | dev_dbg(dev, "Starting lm78 update\n"); |
| 826 | |
| 827 | for (i = 0; i <= 6; i++) { |
| 828 | data->in[i] = |
| 829 | lm78_read_value(data, LM78_REG_IN(i)); |
| 830 | data->in_min[i] = |
| 831 | lm78_read_value(data, LM78_REG_IN_MIN(i)); |
| 832 | data->in_max[i] = |
| 833 | lm78_read_value(data, LM78_REG_IN_MAX(i)); |
| 834 | } |
| 835 | for (i = 0; i < 3; i++) { |
| 836 | data->fan[i] = |
| 837 | lm78_read_value(data, LM78_REG_FAN(i)); |
| 838 | data->fan_min[i] = |
| 839 | lm78_read_value(data, LM78_REG_FAN_MIN(i)); |
| 840 | } |
| 841 | data->temp = lm78_read_value(data, LM78_REG_TEMP); |
| 842 | data->temp_over = |
| 843 | lm78_read_value(data, LM78_REG_TEMP_OVER); |
| 844 | data->temp_hyst = |
| 845 | lm78_read_value(data, LM78_REG_TEMP_HYST); |
| 846 | i = lm78_read_value(data, LM78_REG_VID_FANDIV); |
| 847 | data->vid = i & 0x0f; |
| 848 | if (data->type == lm79) |
| 849 | data->vid |= |
| 850 | (lm78_read_value(data, LM78_REG_CHIPID) & |
| 851 | 0x01) << 4; |
| 852 | else |
| 853 | data->vid |= 0x10; |
| 854 | data->fan_div[0] = (i >> 4) & 0x03; |
| 855 | data->fan_div[1] = i >> 6; |
| 856 | data->alarms = lm78_read_value(data, LM78_REG_ALARM1) + |
| 857 | (lm78_read_value(data, LM78_REG_ALARM2) << 8); |
| 858 | data->last_updated = jiffies; |
| 859 | data->valid = 1; |
| 860 | |
| 861 | data->fan_div[2] = 1; |
| 862 | } |
| 863 | |
| 864 | mutex_unlock(&data->update_lock); |
| 865 | |
| 866 | return data; |
| 867 | } |
| 868 | |
| 869 | /* return 1 if a supported chip is found, 0 otherwise */ |
| 870 | static int __init lm78_isa_found(unsigned short address) |
| 871 | { |
| 872 | int val, save, found = 0; |
| 873 | |
| 874 | /* We have to request the region in two parts because some |
| 875 | boards declare base+4 to base+7 as a PNP device */ |
| 876 | if (!request_region(address, 4, "lm78")) { |
| 877 | pr_debug("lm78: Failed to request low part of region\n"); |
| 878 | return 0; |
| 879 | } |
| 880 | if (!request_region(address + 4, 4, "lm78")) { |
| 881 | pr_debug("lm78: Failed to request high part of region\n"); |
| 882 | release_region(address, 4); |
| 883 | return 0; |
| 884 | } |
| 885 | |
| 886 | #define REALLY_SLOW_IO |
| 887 | /* We need the timeouts for at least some LM78-like |
| 888 | chips. But only if we read 'undefined' registers. */ |
| 889 | val = inb_p(address + 1); |
| 890 | if (inb_p(address + 2) != val |
| 891 | || inb_p(address + 3) != val |
| 892 | || inb_p(address + 7) != val) |
| 893 | goto release; |
| 894 | #undef REALLY_SLOW_IO |
| 895 | |
| 896 | /* We should be able to change the 7 LSB of the address port. The |
| 897 | MSB (busy flag) should be clear initially, set after the write. */ |
| 898 | save = inb_p(address + LM78_ADDR_REG_OFFSET); |
| 899 | if (save & 0x80) |
| 900 | goto release; |
| 901 | val = ~save & 0x7f; |
| 902 | outb_p(val, address + LM78_ADDR_REG_OFFSET); |
| 903 | if (inb_p(address + LM78_ADDR_REG_OFFSET) != (val | 0x80)) { |
| 904 | outb_p(save, address + LM78_ADDR_REG_OFFSET); |
| 905 | goto release; |
| 906 | } |
| 907 | |
| 908 | /* We found a device, now see if it could be an LM78 */ |
| 909 | outb_p(LM78_REG_CONFIG, address + LM78_ADDR_REG_OFFSET); |
| 910 | val = inb_p(address + LM78_DATA_REG_OFFSET); |
| 911 | if (val & 0x80) |
| 912 | goto release; |
| 913 | outb_p(LM78_REG_I2C_ADDR, address + LM78_ADDR_REG_OFFSET); |
| 914 | val = inb_p(address + LM78_DATA_REG_OFFSET); |
| 915 | if (val < 0x03 || val > 0x77) /* Not a valid I2C address */ |
| 916 | goto release; |
| 917 | |
| 918 | /* The busy flag should be clear again */ |
| 919 | if (inb_p(address + LM78_ADDR_REG_OFFSET) & 0x80) |
| 920 | goto release; |
| 921 | |
| 922 | /* Explicitly prevent the misdetection of Winbond chips */ |
| 923 | outb_p(0x4f, address + LM78_ADDR_REG_OFFSET); |
| 924 | val = inb_p(address + LM78_DATA_REG_OFFSET); |
| 925 | if (val == 0xa3 || val == 0x5c) |
| 926 | goto release; |
| 927 | |
| 928 | /* Explicitly prevent the misdetection of ITE chips */ |
| 929 | outb_p(0x58, address + LM78_ADDR_REG_OFFSET); |
| 930 | val = inb_p(address + LM78_DATA_REG_OFFSET); |
| 931 | if (val == 0x90) |
| 932 | goto release; |
| 933 | |
| 934 | /* Determine the chip type */ |
| 935 | outb_p(LM78_REG_CHIPID, address + LM78_ADDR_REG_OFFSET); |
| 936 | val = inb_p(address + LM78_DATA_REG_OFFSET); |
| 937 | if (val == 0x00 || val == 0x20 /* LM78 */ |
| 938 | || val == 0x40 /* LM78-J */ |
| 939 | || (val & 0xfe) == 0xc0) /* LM79 */ |
| 940 | found = 1; |
| 941 | |
| 942 | if (found) |
| 943 | pr_info("lm78: Found an %s chip at %#x\n", |
| 944 | val & 0x80 ? "LM79" : "LM78", (int)address); |
| 945 | |
| 946 | release: |
| 947 | release_region(address + 4, 4); |
| 948 | release_region(address, 4); |
| 949 | return found; |
| 950 | } |
| 951 | |
| 952 | static int __init lm78_isa_device_add(unsigned short address) |
| 953 | { |
| 954 | struct resource res = { |
| 955 | .start = address, |
| 956 | .end = address + LM78_EXTENT - 1, |
| 957 | .name = "lm78", |
| 958 | .flags = IORESOURCE_IO, |
| 959 | }; |
| 960 | int err; |
| 961 | |
| 962 | pdev = platform_device_alloc("lm78", address); |
| 963 | if (!pdev) { |
| 964 | err = -ENOMEM; |
| 965 | printk(KERN_ERR "lm78: Device allocation failed\n"); |
| 966 | goto exit; |
| 967 | } |
| 968 | |
| 969 | err = platform_device_add_resources(pdev, &res, 1); |
| 970 | if (err) { |
| 971 | printk(KERN_ERR "lm78: Device resource addition failed " |
| 972 | "(%d)\n", err); |
| 973 | goto exit_device_put; |
| 974 | } |
| 975 | |
| 976 | err = platform_device_add(pdev); |
| 977 | if (err) { |
| 978 | printk(KERN_ERR "lm78: Device addition failed (%d)\n", |
| 979 | err); |
| 980 | goto exit_device_put; |
| 981 | } |
| 982 | |
| 983 | return 0; |
| 984 | |
| 985 | exit_device_put: |
| 986 | platform_device_put(pdev); |
| 987 | exit: |
| 988 | pdev = NULL; |
| 989 | return err; |
| 990 | } |
| 991 | |
| 992 | static int __init sm_lm78_init(void) |
| 993 | { |
| 994 | int res; |
| 995 | |
| 996 | /* We register the ISA device first, so that we can skip the |
| 997 | * registration of an I2C interface to the same device. */ |
| 998 | if (lm78_isa_found(isa_address)) { |
| 999 | res = platform_driver_register(&lm78_isa_driver); |
| 1000 | if (res) |
| 1001 | goto exit; |
| 1002 | |
| 1003 | /* Sets global pdev as a side effect */ |
| 1004 | res = lm78_isa_device_add(isa_address); |
| 1005 | if (res) |
| 1006 | goto exit_unreg_isa_driver; |
| 1007 | } |
| 1008 | |
| 1009 | res = i2c_add_driver(&lm78_driver); |
| 1010 | if (res) |
| 1011 | goto exit_unreg_isa_device; |
| 1012 | |
| 1013 | return 0; |
| 1014 | |
| 1015 | exit_unreg_isa_device: |
| 1016 | platform_device_unregister(pdev); |
| 1017 | exit_unreg_isa_driver: |
| 1018 | platform_driver_unregister(&lm78_isa_driver); |
| 1019 | exit: |
| 1020 | return res; |
| 1021 | } |
| 1022 | |
| 1023 | static void __exit sm_lm78_exit(void) |
| 1024 | { |
| 1025 | if (pdev) { |
| 1026 | platform_device_unregister(pdev); |
| 1027 | platform_driver_unregister(&lm78_isa_driver); |
| 1028 | } |
| 1029 | i2c_del_driver(&lm78_driver); |
| 1030 | } |
| 1031 | |
| 1032 | |
| 1033 | |
| 1034 | MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>"); |
| 1035 | MODULE_DESCRIPTION("LM78/LM79 driver"); |
| 1036 | MODULE_LICENSE("GPL"); |
| 1037 | |
| 1038 | module_init(sm_lm78_init); |
| 1039 | module_exit(sm_lm78_exit); |