Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | fscpos.c - Kernel module for hardware monitoring with FSC Poseidon chips |
| 3 | Copyright (C) 2004, 2005 Stefan Ott <stefan@desire.ch> |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 2 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program; if not, write to the Free Software |
| 17 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 18 | */ |
| 19 | |
| 20 | /* |
| 21 | fujitsu siemens poseidon chip, |
| 22 | module based on the old fscpos module by Hermann Jung <hej@odn.de> and |
| 23 | the fscher module by Reinhard Nissl <rnissl@gmx.de> |
| 24 | |
| 25 | original module based on lm80.c |
| 26 | Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl> |
| 27 | and Philip Edelbrock <phil@netroedge.com> |
| 28 | |
| 29 | Thanks to Jean Delvare for reviewing my code and suggesting a lot of |
| 30 | improvements. |
| 31 | */ |
| 32 | |
| 33 | #include <linux/module.h> |
| 34 | #include <linux/slab.h> |
Jean Delvare | 0cacdf2 | 2005-07-29 12:15:12 -0700 | [diff] [blame] | 35 | #include <linux/jiffies.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/i2c.h> |
| 37 | #include <linux/i2c-sensor.h> |
| 38 | #include <linux/init.h> |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 39 | #include <linux/hwmon.h> |
| 40 | #include <linux/err.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | /* |
| 43 | * Addresses to scan |
| 44 | */ |
| 45 | static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
| 47 | /* |
| 48 | * Insmod parameters |
| 49 | */ |
| 50 | SENSORS_INSMOD_1(fscpos); |
| 51 | |
| 52 | /* |
| 53 | * The FSCPOS registers |
| 54 | */ |
| 55 | |
| 56 | /* chip identification */ |
| 57 | #define FSCPOS_REG_IDENT_0 0x00 |
| 58 | #define FSCPOS_REG_IDENT_1 0x01 |
| 59 | #define FSCPOS_REG_IDENT_2 0x02 |
| 60 | #define FSCPOS_REG_REVISION 0x03 |
| 61 | |
| 62 | /* global control and status */ |
| 63 | #define FSCPOS_REG_EVENT_STATE 0x04 |
| 64 | #define FSCPOS_REG_CONTROL 0x05 |
| 65 | |
| 66 | /* watchdog */ |
| 67 | #define FSCPOS_REG_WDOG_PRESET 0x28 |
| 68 | #define FSCPOS_REG_WDOG_STATE 0x23 |
| 69 | #define FSCPOS_REG_WDOG_CONTROL 0x21 |
| 70 | |
| 71 | /* voltages */ |
| 72 | #define FSCPOS_REG_VOLT_12 0x45 |
| 73 | #define FSCPOS_REG_VOLT_5 0x42 |
| 74 | #define FSCPOS_REG_VOLT_BATT 0x48 |
| 75 | |
| 76 | /* fans - the chip does not support minimum speed for fan2 */ |
| 77 | static u8 FSCPOS_REG_PWM[] = { 0x55, 0x65 }; |
| 78 | static u8 FSCPOS_REG_FAN_ACT[] = { 0x0e, 0x6b, 0xab }; |
| 79 | static u8 FSCPOS_REG_FAN_STATE[] = { 0x0d, 0x62, 0xa2 }; |
| 80 | static u8 FSCPOS_REG_FAN_RIPPLE[] = { 0x0f, 0x6f, 0xaf }; |
| 81 | |
| 82 | /* temperatures */ |
| 83 | static u8 FSCPOS_REG_TEMP_ACT[] = { 0x64, 0x32, 0x35 }; |
| 84 | static u8 FSCPOS_REG_TEMP_STATE[] = { 0x71, 0x81, 0x91 }; |
| 85 | |
| 86 | /* |
| 87 | * Functions declaration |
| 88 | */ |
| 89 | static int fscpos_attach_adapter(struct i2c_adapter *adapter); |
| 90 | static int fscpos_detect(struct i2c_adapter *adapter, int address, int kind); |
| 91 | static int fscpos_detach_client(struct i2c_client *client); |
| 92 | |
| 93 | static int fscpos_read_value(struct i2c_client *client, u8 register); |
| 94 | static int fscpos_write_value(struct i2c_client *client, u8 register, u8 value); |
| 95 | static struct fscpos_data *fscpos_update_device(struct device *dev); |
| 96 | static void fscpos_init_client(struct i2c_client *client); |
| 97 | |
| 98 | static void reset_fan_alarm(struct i2c_client *client, int nr); |
| 99 | |
| 100 | /* |
| 101 | * Driver data (common to all clients) |
| 102 | */ |
| 103 | static struct i2c_driver fscpos_driver = { |
| 104 | .owner = THIS_MODULE, |
| 105 | .name = "fscpos", |
| 106 | .id = I2C_DRIVERID_FSCPOS, |
| 107 | .flags = I2C_DF_NOTIFY, |
| 108 | .attach_adapter = fscpos_attach_adapter, |
| 109 | .detach_client = fscpos_detach_client, |
| 110 | }; |
| 111 | |
| 112 | /* |
| 113 | * Client data (each client gets its own) |
| 114 | */ |
| 115 | struct fscpos_data { |
| 116 | struct i2c_client client; |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 117 | struct class_device *class_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | struct semaphore update_lock; |
| 119 | char valid; /* 0 until following fields are valid */ |
| 120 | unsigned long last_updated; /* In jiffies */ |
| 121 | |
| 122 | /* register values */ |
| 123 | u8 revision; /* revision of chip */ |
| 124 | u8 global_event; /* global event status */ |
| 125 | u8 global_control; /* global control register */ |
| 126 | u8 wdog_control; /* watchdog control */ |
| 127 | u8 wdog_state; /* watchdog status */ |
| 128 | u8 wdog_preset; /* watchdog preset */ |
| 129 | u8 volt[3]; /* 12, 5, battery current */ |
| 130 | u8 temp_act[3]; /* temperature */ |
| 131 | u8 temp_status[3]; /* status of sensor */ |
| 132 | u8 fan_act[3]; /* fans revolutions per second */ |
| 133 | u8 fan_status[3]; /* fan status */ |
| 134 | u8 pwm[2]; /* fan min value for rps */ |
| 135 | u8 fan_ripple[3]; /* divider for rps */ |
| 136 | }; |
| 137 | |
| 138 | /* Temperature */ |
| 139 | #define TEMP_FROM_REG(val) (((val) - 128) * 1000) |
| 140 | |
| 141 | static ssize_t show_temp_input(struct fscpos_data *data, char *buf, int nr) |
| 142 | { |
| 143 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[nr - 1])); |
| 144 | } |
| 145 | |
| 146 | static ssize_t show_temp_status(struct fscpos_data *data, char *buf, int nr) |
| 147 | { |
| 148 | /* bits 2..7 reserved => mask with 0x03 */ |
| 149 | return sprintf(buf, "%u\n", data->temp_status[nr - 1] & 0x03); |
| 150 | } |
| 151 | |
| 152 | static ssize_t show_temp_reset(struct fscpos_data *data, char *buf, int nr) |
| 153 | { |
| 154 | return sprintf(buf, "1\n"); |
| 155 | } |
| 156 | |
| 157 | static ssize_t set_temp_reset(struct i2c_client *client, struct fscpos_data |
| 158 | *data, const char *buf, size_t count, int nr, int reg) |
| 159 | { |
| 160 | unsigned long v = simple_strtoul(buf, NULL, 10); |
| 161 | if (v != 1) { |
| 162 | dev_err(&client->dev, "temp_reset value %ld not supported. " |
| 163 | "Use 1 to reset the alarm!\n", v); |
| 164 | return -EINVAL; |
| 165 | } |
| 166 | |
| 167 | dev_info(&client->dev, "You used the temp_reset feature which has not " |
| 168 | "been proplerly tested. Please report your " |
| 169 | "experience to the module author.\n"); |
| 170 | |
| 171 | /* Supported value: 2 (clears the status) */ |
Jean Delvare | 3fd1bb9 | 2005-08-25 18:43:37 +0200 | [diff] [blame] | 172 | fscpos_write_value(client, FSCPOS_REG_TEMP_STATE[nr - 1], 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | return count; |
| 174 | } |
| 175 | |
| 176 | /* Fans */ |
| 177 | #define RPM_FROM_REG(val) ((val) * 60) |
| 178 | |
| 179 | static ssize_t show_fan_status(struct fscpos_data *data, char *buf, int nr) |
| 180 | { |
| 181 | /* bits 0..1, 3..7 reserved => mask with 0x04 */ |
| 182 | return sprintf(buf, "%u\n", data->fan_status[nr - 1] & 0x04); |
| 183 | } |
| 184 | |
| 185 | static ssize_t show_fan_input(struct fscpos_data *data, char *buf, int nr) |
| 186 | { |
| 187 | return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[nr - 1])); |
| 188 | } |
| 189 | |
| 190 | static ssize_t show_fan_ripple(struct fscpos_data *data, char *buf, int nr) |
| 191 | { |
| 192 | /* bits 2..7 reserved => mask with 0x03 */ |
| 193 | return sprintf(buf, "%u\n", data->fan_ripple[nr - 1] & 0x03); |
| 194 | } |
| 195 | |
| 196 | static ssize_t set_fan_ripple(struct i2c_client *client, struct fscpos_data |
| 197 | *data, const char *buf, size_t count, int nr, int reg) |
| 198 | { |
| 199 | /* supported values: 2, 4, 8 */ |
| 200 | unsigned long v = simple_strtoul(buf, NULL, 10); |
| 201 | |
| 202 | switch (v) { |
| 203 | case 2: v = 1; break; |
| 204 | case 4: v = 2; break; |
| 205 | case 8: v = 3; break; |
| 206 | default: |
| 207 | dev_err(&client->dev, "fan_ripple value %ld not supported. " |
| 208 | "Must be one of 2, 4 or 8!\n", v); |
| 209 | return -EINVAL; |
| 210 | } |
| 211 | |
| 212 | down(&data->update_lock); |
| 213 | /* bits 2..7 reserved => mask with 0x03 */ |
| 214 | data->fan_ripple[nr - 1] &= ~0x03; |
| 215 | data->fan_ripple[nr - 1] |= v; |
| 216 | |
| 217 | fscpos_write_value(client, reg, data->fan_ripple[nr - 1]); |
| 218 | up(&data->update_lock); |
| 219 | return count; |
| 220 | } |
| 221 | |
| 222 | static ssize_t show_pwm(struct fscpos_data *data, char *buf, int nr) |
| 223 | { |
| 224 | return sprintf(buf, "%u\n", data->pwm[nr - 1]); |
| 225 | } |
| 226 | |
| 227 | static ssize_t set_pwm(struct i2c_client *client, struct fscpos_data *data, |
| 228 | const char *buf, size_t count, int nr, int reg) |
| 229 | { |
| 230 | unsigned long v = simple_strtoul(buf, NULL, 10); |
| 231 | |
| 232 | /* Range: 0..255 */ |
| 233 | if (v < 0) v = 0; |
| 234 | if (v > 255) v = 255; |
| 235 | |
| 236 | down(&data->update_lock); |
| 237 | data->pwm[nr - 1] = v; |
| 238 | fscpos_write_value(client, reg, data->pwm[nr - 1]); |
| 239 | up(&data->update_lock); |
| 240 | return count; |
| 241 | } |
| 242 | |
| 243 | static void reset_fan_alarm(struct i2c_client *client, int nr) |
| 244 | { |
| 245 | fscpos_write_value(client, FSCPOS_REG_FAN_STATE[nr], 4); |
| 246 | } |
| 247 | |
| 248 | /* Volts */ |
| 249 | #define VOLT_FROM_REG(val, mult) ((val) * (mult) / 255) |
| 250 | |
Yani Ioannou | 30f7429 | 2005-05-17 06:41:35 -0400 | [diff] [blame] | 251 | static ssize_t show_volt_12(struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | { |
| 253 | struct fscpos_data *data = fscpos_update_device(dev); |
| 254 | return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[0], 14200)); |
| 255 | } |
| 256 | |
Yani Ioannou | 30f7429 | 2005-05-17 06:41:35 -0400 | [diff] [blame] | 257 | static ssize_t show_volt_5(struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | { |
| 259 | struct fscpos_data *data = fscpos_update_device(dev); |
| 260 | return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[1], 6600)); |
| 261 | } |
| 262 | |
Yani Ioannou | 30f7429 | 2005-05-17 06:41:35 -0400 | [diff] [blame] | 263 | static ssize_t show_volt_batt(struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | { |
| 265 | struct fscpos_data *data = fscpos_update_device(dev); |
| 266 | return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[2], 3300)); |
| 267 | } |
| 268 | |
| 269 | /* Watchdog */ |
| 270 | static ssize_t show_wdog_control(struct fscpos_data *data, char *buf) |
| 271 | { |
| 272 | /* bits 0..3 reserved, bit 6 write only => mask with 0xb0 */ |
| 273 | return sprintf(buf, "%u\n", data->wdog_control & 0xb0); |
| 274 | } |
| 275 | |
| 276 | static ssize_t set_wdog_control(struct i2c_client *client, struct fscpos_data |
| 277 | *data, const char *buf, size_t count, int reg) |
| 278 | { |
| 279 | /* bits 0..3 reserved => mask with 0xf0 */ |
| 280 | unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0; |
| 281 | |
| 282 | down(&data->update_lock); |
| 283 | data->wdog_control &= ~0xf0; |
| 284 | data->wdog_control |= v; |
| 285 | fscpos_write_value(client, reg, data->wdog_control); |
| 286 | up(&data->update_lock); |
| 287 | return count; |
| 288 | } |
| 289 | |
| 290 | static ssize_t show_wdog_state(struct fscpos_data *data, char *buf) |
| 291 | { |
| 292 | /* bits 0, 2..7 reserved => mask with 0x02 */ |
| 293 | return sprintf(buf, "%u\n", data->wdog_state & 0x02); |
| 294 | } |
| 295 | |
| 296 | static ssize_t set_wdog_state(struct i2c_client *client, struct fscpos_data |
| 297 | *data, const char *buf, size_t count, int reg) |
| 298 | { |
| 299 | unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02; |
| 300 | |
| 301 | /* Valid values: 2 (clear) */ |
| 302 | if (v != 2) { |
| 303 | dev_err(&client->dev, "wdog_state value %ld not supported. " |
| 304 | "Must be 2 to clear the state!\n", v); |
| 305 | return -EINVAL; |
| 306 | } |
| 307 | |
| 308 | down(&data->update_lock); |
| 309 | data->wdog_state &= ~v; |
| 310 | fscpos_write_value(client, reg, v); |
| 311 | up(&data->update_lock); |
| 312 | return count; |
| 313 | } |
| 314 | |
| 315 | static ssize_t show_wdog_preset(struct fscpos_data *data, char *buf) |
| 316 | { |
| 317 | return sprintf(buf, "%u\n", data->wdog_preset); |
| 318 | } |
| 319 | |
| 320 | static ssize_t set_wdog_preset(struct i2c_client *client, struct fscpos_data |
| 321 | *data, const char *buf, size_t count, int reg) |
| 322 | { |
| 323 | unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff; |
| 324 | |
| 325 | down(&data->update_lock); |
| 326 | data->wdog_preset = v; |
| 327 | fscpos_write_value(client, reg, data->wdog_preset); |
| 328 | up(&data->update_lock); |
| 329 | return count; |
| 330 | } |
| 331 | |
| 332 | /* Event */ |
Yani Ioannou | 30f7429 | 2005-05-17 06:41:35 -0400 | [diff] [blame] | 333 | static ssize_t show_event(struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | { |
| 335 | /* bits 5..7 reserved => mask with 0x1f */ |
| 336 | struct fscpos_data *data = fscpos_update_device(dev); |
| 337 | return sprintf(buf, "%u\n", data->global_event & 0x9b); |
| 338 | } |
| 339 | |
| 340 | /* |
| 341 | * Sysfs stuff |
| 342 | */ |
| 343 | #define create_getter(kind, sub) \ |
Yani Ioannou | 30f7429 | 2005-05-17 06:41:35 -0400 | [diff] [blame] | 344 | static ssize_t sysfs_show_##kind##sub(struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | { \ |
| 346 | struct fscpos_data *data = fscpos_update_device(dev); \ |
| 347 | return show_##kind##sub(data, buf); \ |
| 348 | } |
| 349 | |
| 350 | #define create_getter_n(kind, offset, sub) \ |
Yani Ioannou | 30f7429 | 2005-05-17 06:41:35 -0400 | [diff] [blame] | 351 | static ssize_t sysfs_show_##kind##offset##sub(struct device *dev, struct device_attribute *attr, char\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | *buf) \ |
| 353 | { \ |
| 354 | struct fscpos_data *data = fscpos_update_device(dev); \ |
| 355 | return show_##kind##sub(data, buf, offset); \ |
| 356 | } |
| 357 | |
| 358 | #define create_setter(kind, sub, reg) \ |
Yani Ioannou | 30f7429 | 2005-05-17 06:41:35 -0400 | [diff] [blame] | 359 | static ssize_t sysfs_set_##kind##sub (struct device *dev, struct device_attribute *attr, const char \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | *buf, size_t count) \ |
| 361 | { \ |
| 362 | struct i2c_client *client = to_i2c_client(dev); \ |
| 363 | struct fscpos_data *data = i2c_get_clientdata(client); \ |
| 364 | return set_##kind##sub(client, data, buf, count, reg); \ |
| 365 | } |
| 366 | |
| 367 | #define create_setter_n(kind, offset, sub, reg) \ |
Yani Ioannou | 30f7429 | 2005-05-17 06:41:35 -0400 | [diff] [blame] | 368 | static ssize_t sysfs_set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | const char *buf, size_t count) \ |
| 370 | { \ |
| 371 | struct i2c_client *client = to_i2c_client(dev); \ |
| 372 | struct fscpos_data *data = i2c_get_clientdata(client); \ |
| 373 | return set_##kind##sub(client, data, buf, count, offset, reg);\ |
| 374 | } |
| 375 | |
| 376 | #define create_sysfs_device_ro(kind, sub, offset) \ |
| 377 | static DEVICE_ATTR(kind##offset##sub, S_IRUGO, \ |
| 378 | sysfs_show_##kind##offset##sub, NULL); |
| 379 | |
| 380 | #define create_sysfs_device_rw(kind, sub, offset) \ |
| 381 | static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, \ |
| 382 | sysfs_show_##kind##offset##sub, sysfs_set_##kind##offset##sub); |
| 383 | |
| 384 | #define sysfs_ro_n(kind, sub, offset) \ |
| 385 | create_getter_n(kind, offset, sub); \ |
| 386 | create_sysfs_device_ro(kind, sub, offset); |
| 387 | |
| 388 | #define sysfs_rw_n(kind, sub, offset, reg) \ |
| 389 | create_getter_n(kind, offset, sub); \ |
| 390 | create_setter_n(kind, offset, sub, reg); \ |
| 391 | create_sysfs_device_rw(kind, sub, offset); |
| 392 | |
| 393 | #define sysfs_rw(kind, sub, reg) \ |
| 394 | create_getter(kind, sub); \ |
| 395 | create_setter(kind, sub, reg); \ |
| 396 | create_sysfs_device_rw(kind, sub,); |
| 397 | |
| 398 | #define sysfs_fan_with_min(offset, reg_status, reg_ripple, reg_min) \ |
| 399 | sysfs_fan(offset, reg_status, reg_ripple); \ |
| 400 | sysfs_rw_n(pwm,, offset, reg_min); |
| 401 | |
| 402 | #define sysfs_fan(offset, reg_status, reg_ripple) \ |
| 403 | sysfs_ro_n(fan, _input, offset); \ |
| 404 | sysfs_ro_n(fan, _status, offset); \ |
| 405 | sysfs_rw_n(fan, _ripple, offset, reg_ripple); |
| 406 | |
| 407 | #define sysfs_temp(offset, reg_status) \ |
| 408 | sysfs_ro_n(temp, _input, offset); \ |
| 409 | sysfs_ro_n(temp, _status, offset); \ |
| 410 | sysfs_rw_n(temp, _reset, offset, reg_status); |
| 411 | |
| 412 | #define sysfs_watchdog(reg_wdog_preset, reg_wdog_state, reg_wdog_control) \ |
| 413 | sysfs_rw(wdog, _control, reg_wdog_control); \ |
| 414 | sysfs_rw(wdog, _preset, reg_wdog_preset); \ |
| 415 | sysfs_rw(wdog, _state, reg_wdog_state); |
| 416 | |
| 417 | sysfs_fan_with_min(1, FSCPOS_REG_FAN_STATE[0], FSCPOS_REG_FAN_RIPPLE[0], |
| 418 | FSCPOS_REG_PWM[0]); |
| 419 | sysfs_fan_with_min(2, FSCPOS_REG_FAN_STATE[1], FSCPOS_REG_FAN_RIPPLE[1], |
| 420 | FSCPOS_REG_PWM[1]); |
| 421 | sysfs_fan(3, FSCPOS_REG_FAN_STATE[2], FSCPOS_REG_FAN_RIPPLE[2]); |
| 422 | |
| 423 | sysfs_temp(1, FSCPOS_REG_TEMP_STATE[0]); |
| 424 | sysfs_temp(2, FSCPOS_REG_TEMP_STATE[1]); |
| 425 | sysfs_temp(3, FSCPOS_REG_TEMP_STATE[2]); |
| 426 | |
| 427 | sysfs_watchdog(FSCPOS_REG_WDOG_PRESET, FSCPOS_REG_WDOG_STATE, |
| 428 | FSCPOS_REG_WDOG_CONTROL); |
| 429 | |
| 430 | static DEVICE_ATTR(event, S_IRUGO, show_event, NULL); |
| 431 | static DEVICE_ATTR(in0_input, S_IRUGO, show_volt_12, NULL); |
| 432 | static DEVICE_ATTR(in1_input, S_IRUGO, show_volt_5, NULL); |
| 433 | static DEVICE_ATTR(in2_input, S_IRUGO, show_volt_batt, NULL); |
| 434 | |
| 435 | static int fscpos_attach_adapter(struct i2c_adapter *adapter) |
| 436 | { |
| 437 | if (!(adapter->class & I2C_CLASS_HWMON)) |
| 438 | return 0; |
Jean Delvare | 2ed2dc3 | 2005-07-31 21:42:02 +0200 | [diff] [blame^] | 439 | return i2c_probe(adapter, &addr_data, fscpos_detect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | } |
| 441 | |
| 442 | int fscpos_detect(struct i2c_adapter *adapter, int address, int kind) |
| 443 | { |
| 444 | struct i2c_client *new_client; |
| 445 | struct fscpos_data *data; |
| 446 | int err = 0; |
| 447 | |
| 448 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
| 449 | goto exit; |
| 450 | |
| 451 | /* |
| 452 | * OK. For now, we presume we have a valid client. We now create the |
| 453 | * client structure, even though we cannot fill it completely yet. |
| 454 | * But it allows us to access fscpos_{read,write}_value. |
| 455 | */ |
| 456 | |
| 457 | if (!(data = kmalloc(sizeof(struct fscpos_data), GFP_KERNEL))) { |
| 458 | err = -ENOMEM; |
| 459 | goto exit; |
| 460 | } |
| 461 | memset(data, 0, sizeof(struct fscpos_data)); |
| 462 | |
| 463 | new_client = &data->client; |
| 464 | i2c_set_clientdata(new_client, data); |
| 465 | new_client->addr = address; |
| 466 | new_client->adapter = adapter; |
| 467 | new_client->driver = &fscpos_driver; |
| 468 | new_client->flags = 0; |
| 469 | |
| 470 | /* Do the remaining detection unless force or force_fscpos parameter */ |
| 471 | if (kind < 0) { |
| 472 | if ((fscpos_read_value(new_client, FSCPOS_REG_IDENT_0) |
| 473 | != 0x50) /* 'P' */ |
| 474 | || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_1) |
| 475 | != 0x45) /* 'E' */ |
| 476 | || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_2) |
| 477 | != 0x47))/* 'G' */ |
| 478 | { |
| 479 | dev_dbg(&new_client->dev, "fscpos detection failed\n"); |
| 480 | goto exit_free; |
| 481 | } |
| 482 | } |
| 483 | |
| 484 | /* Fill in the remaining client fields and put it in the global list */ |
| 485 | strlcpy(new_client->name, "fscpos", I2C_NAME_SIZE); |
| 486 | |
| 487 | data->valid = 0; |
| 488 | init_MUTEX(&data->update_lock); |
| 489 | |
| 490 | /* Tell the I2C layer a new client has arrived */ |
| 491 | if ((err = i2c_attach_client(new_client))) |
| 492 | goto exit_free; |
| 493 | |
| 494 | /* Inizialize the fscpos chip */ |
| 495 | fscpos_init_client(new_client); |
| 496 | |
| 497 | /* Announce that the chip was found */ |
| 498 | dev_info(&new_client->dev, "Found fscpos chip, rev %u\n", data->revision); |
| 499 | |
| 500 | /* Register sysfs hooks */ |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 501 | data->class_dev = hwmon_device_register(&new_client->dev); |
| 502 | if (IS_ERR(data->class_dev)) { |
| 503 | err = PTR_ERR(data->class_dev); |
| 504 | goto exit_detach; |
| 505 | } |
| 506 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | device_create_file(&new_client->dev, &dev_attr_event); |
| 508 | device_create_file(&new_client->dev, &dev_attr_in0_input); |
| 509 | device_create_file(&new_client->dev, &dev_attr_in1_input); |
| 510 | device_create_file(&new_client->dev, &dev_attr_in2_input); |
| 511 | device_create_file(&new_client->dev, &dev_attr_wdog_control); |
| 512 | device_create_file(&new_client->dev, &dev_attr_wdog_preset); |
| 513 | device_create_file(&new_client->dev, &dev_attr_wdog_state); |
| 514 | device_create_file(&new_client->dev, &dev_attr_temp1_input); |
| 515 | device_create_file(&new_client->dev, &dev_attr_temp1_status); |
| 516 | device_create_file(&new_client->dev, &dev_attr_temp1_reset); |
| 517 | device_create_file(&new_client->dev, &dev_attr_temp2_input); |
| 518 | device_create_file(&new_client->dev, &dev_attr_temp2_status); |
| 519 | device_create_file(&new_client->dev, &dev_attr_temp2_reset); |
| 520 | device_create_file(&new_client->dev, &dev_attr_temp3_input); |
| 521 | device_create_file(&new_client->dev, &dev_attr_temp3_status); |
| 522 | device_create_file(&new_client->dev, &dev_attr_temp3_reset); |
| 523 | device_create_file(&new_client->dev, &dev_attr_fan1_input); |
| 524 | device_create_file(&new_client->dev, &dev_attr_fan1_status); |
| 525 | device_create_file(&new_client->dev, &dev_attr_fan1_ripple); |
| 526 | device_create_file(&new_client->dev, &dev_attr_pwm1); |
| 527 | device_create_file(&new_client->dev, &dev_attr_fan2_input); |
| 528 | device_create_file(&new_client->dev, &dev_attr_fan2_status); |
| 529 | device_create_file(&new_client->dev, &dev_attr_fan2_ripple); |
| 530 | device_create_file(&new_client->dev, &dev_attr_pwm2); |
| 531 | device_create_file(&new_client->dev, &dev_attr_fan3_input); |
| 532 | device_create_file(&new_client->dev, &dev_attr_fan3_status); |
| 533 | device_create_file(&new_client->dev, &dev_attr_fan3_ripple); |
| 534 | |
| 535 | return 0; |
| 536 | |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 537 | exit_detach: |
| 538 | i2c_detach_client(new_client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | exit_free: |
| 540 | kfree(data); |
| 541 | exit: |
| 542 | return err; |
| 543 | } |
| 544 | |
| 545 | static int fscpos_detach_client(struct i2c_client *client) |
| 546 | { |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 547 | struct fscpos_data *data = i2c_get_clientdata(client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | int err; |
| 549 | |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 550 | hwmon_device_unregister(data->class_dev); |
| 551 | |
Jean Delvare | 7bef559 | 2005-07-27 22:14:49 +0200 | [diff] [blame] | 552 | if ((err = i2c_detach_client(client))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | return err; |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 554 | kfree(data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | return 0; |
| 556 | } |
| 557 | |
| 558 | static int fscpos_read_value(struct i2c_client *client, u8 reg) |
| 559 | { |
| 560 | dev_dbg(&client->dev, "Read reg 0x%02x\n", reg); |
| 561 | return i2c_smbus_read_byte_data(client, reg); |
| 562 | } |
| 563 | |
| 564 | static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value) |
| 565 | { |
| 566 | dev_dbg(&client->dev, "Write reg 0x%02x, val 0x%02x\n", reg, value); |
| 567 | return i2c_smbus_write_byte_data(client, reg, value); |
| 568 | } |
| 569 | |
| 570 | /* Called when we have found a new FSCPOS chip */ |
| 571 | static void fscpos_init_client(struct i2c_client *client) |
| 572 | { |
| 573 | struct fscpos_data *data = i2c_get_clientdata(client); |
| 574 | |
| 575 | /* read revision from chip */ |
| 576 | data->revision = fscpos_read_value(client, FSCPOS_REG_REVISION); |
| 577 | } |
| 578 | |
| 579 | static struct fscpos_data *fscpos_update_device(struct device *dev) |
| 580 | { |
| 581 | struct i2c_client *client = to_i2c_client(dev); |
| 582 | struct fscpos_data *data = i2c_get_clientdata(client); |
| 583 | |
| 584 | down(&data->update_lock); |
| 585 | |
Jean Delvare | 0cacdf2 | 2005-07-29 12:15:12 -0700 | [diff] [blame] | 586 | if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | int i; |
| 588 | |
| 589 | dev_dbg(&client->dev, "Starting fscpos update\n"); |
| 590 | |
| 591 | for (i = 0; i < 3; i++) { |
| 592 | data->temp_act[i] = fscpos_read_value(client, |
| 593 | FSCPOS_REG_TEMP_ACT[i]); |
| 594 | data->temp_status[i] = fscpos_read_value(client, |
| 595 | FSCPOS_REG_TEMP_STATE[i]); |
| 596 | data->fan_act[i] = fscpos_read_value(client, |
| 597 | FSCPOS_REG_FAN_ACT[i]); |
| 598 | data->fan_status[i] = fscpos_read_value(client, |
| 599 | FSCPOS_REG_FAN_STATE[i]); |
| 600 | data->fan_ripple[i] = fscpos_read_value(client, |
| 601 | FSCPOS_REG_FAN_RIPPLE[i]); |
| 602 | if (i < 2) { |
| 603 | /* fan2_min is not supported by the chip */ |
| 604 | data->pwm[i] = fscpos_read_value(client, |
| 605 | FSCPOS_REG_PWM[i]); |
| 606 | } |
| 607 | /* reset fan status if speed is back to > 0 */ |
| 608 | if (data->fan_status[i] != 0 && data->fan_act[i] > 0) { |
| 609 | reset_fan_alarm(client, i); |
| 610 | } |
| 611 | } |
| 612 | |
| 613 | data->volt[0] = fscpos_read_value(client, FSCPOS_REG_VOLT_12); |
| 614 | data->volt[1] = fscpos_read_value(client, FSCPOS_REG_VOLT_5); |
| 615 | data->volt[2] = fscpos_read_value(client, FSCPOS_REG_VOLT_BATT); |
| 616 | |
| 617 | data->wdog_preset = fscpos_read_value(client, |
| 618 | FSCPOS_REG_WDOG_PRESET); |
| 619 | data->wdog_state = fscpos_read_value(client, |
| 620 | FSCPOS_REG_WDOG_STATE); |
| 621 | data->wdog_control = fscpos_read_value(client, |
| 622 | FSCPOS_REG_WDOG_CONTROL); |
| 623 | |
| 624 | data->global_event = fscpos_read_value(client, |
| 625 | FSCPOS_REG_EVENT_STATE); |
| 626 | |
| 627 | data->last_updated = jiffies; |
| 628 | data->valid = 1; |
| 629 | } |
| 630 | up(&data->update_lock); |
| 631 | return data; |
| 632 | } |
| 633 | |
| 634 | static int __init sm_fscpos_init(void) |
| 635 | { |
| 636 | return i2c_add_driver(&fscpos_driver); |
| 637 | } |
| 638 | |
| 639 | static void __exit sm_fscpos_exit(void) |
| 640 | { |
| 641 | i2c_del_driver(&fscpos_driver); |
| 642 | } |
| 643 | |
| 644 | MODULE_AUTHOR("Stefan Ott <stefan@desire.ch> based on work from Hermann Jung " |
| 645 | "<hej@odn.de>, Frodo Looijaard <frodol@dds.nl>" |
| 646 | " and Philip Edelbrock <phil@netroedge.com>"); |
| 647 | MODULE_DESCRIPTION("fujitsu siemens poseidon chip driver"); |
| 648 | MODULE_LICENSE("GPL"); |
| 649 | |
| 650 | module_init(sm_fscpos_init); |
| 651 | module_exit(sm_fscpos_exit); |