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74ba9207 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
40b5cda2 GC |
2 | /* |
3 | * adm9240.c Part of lm_sensors, Linux kernel modules for hardware | |
c387e4eb | 4 | * monitoring |
40b5cda2 GC |
5 | * |
6 | * Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl> | |
7 | * Philip Edelbrock <phil@netroedge.com> | |
8 | * Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl> | |
2ca7b961 | 9 | * Copyright (C) 2005 Grant Coady <gcoady.lk@gmail.com> with valuable |
c387e4eb | 10 | * guidance from Jean Delvare |
40b5cda2 GC |
11 | * |
12 | * Driver supports Analog Devices ADM9240 | |
13 | * Dallas Semiconductor DS1780 | |
14 | * National Semiconductor LM81 | |
15 | * | |
16 | * ADM9240 is the reference, DS1780 and LM81 are register compatibles | |
17 | * | |
18 | * Voltage Six inputs are scaled by chip, VID also reported | |
19 | * Temperature Chip temperature to 0.5'C, maximum and max_hysteris | |
20 | * Fans 2 fans, low speed alarm, automatic fan clock divider | |
21 | * Alarms 16-bit map of active alarms | |
22 | * Analog Out 0..1250 mV output | |
23 | * | |
0de2b244 | 24 | * Chassis Intrusion: clear CI latch with 'echo 0 > intrusion0_alarm' |
40b5cda2 GC |
25 | * |
26 | * Test hardware: Intel SE440BX-2 desktop motherboard --Grant | |
27 | * | |
28 | * LM81 extended temp reading not implemented | |
40b5cda2 GC |
29 | */ |
30 | ||
124b7e34 | 31 | #include <linux/bits.h> |
40b5cda2 GC |
32 | #include <linux/init.h> |
33 | #include <linux/module.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/i2c.h> | |
c7461a66 | 36 | #include <linux/hwmon-sysfs.h> |
943b0830 | 37 | #include <linux/hwmon.h> |
303760b4 | 38 | #include <linux/hwmon-vid.h> |
943b0830 | 39 | #include <linux/err.h> |
9a61bf63 | 40 | #include <linux/mutex.h> |
df885d91 | 41 | #include <linux/regmap.h> |
40b5cda2 GC |
42 | |
43 | /* Addresses to scan */ | |
25e9c86d | 44 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, |
40b5cda2 GC |
45 | I2C_CLIENT_END }; |
46 | ||
e5e9f44c | 47 | enum chips { adm9240, ds1780, lm81 }; |
40b5cda2 GC |
48 | |
49 | /* ADM9240 registers */ | |
50 | #define ADM9240_REG_MAN_ID 0x3e | |
51 | #define ADM9240_REG_DIE_REV 0x3f | |
52 | #define ADM9240_REG_CONFIG 0x40 | |
53 | ||
54 | #define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */ | |
55 | #define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2) | |
56 | #define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2) | |
57 | #define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */ | |
58 | #define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr)) | |
59 | #define ADM9240_REG_INT(nr) (0x41 + (nr)) | |
60 | #define ADM9240_REG_INT_MASK(nr) (0x43 + (nr)) | |
61 | #define ADM9240_REG_TEMP 0x27 | |
c7461a66 | 62 | #define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */ |
40b5cda2 GC |
63 | #define ADM9240_REG_ANALOG_OUT 0x19 |
64 | #define ADM9240_REG_CHASSIS_CLEAR 0x46 | |
65 | #define ADM9240_REG_VID_FAN_DIV 0x47 | |
66 | #define ADM9240_REG_I2C_ADDR 0x48 | |
67 | #define ADM9240_REG_VID4 0x49 | |
68 | #define ADM9240_REG_TEMP_CONF 0x4b | |
69 | ||
70 | /* generalised scaling with integer rounding */ | |
71 | static inline int SCALE(long val, int mul, int div) | |
72 | { | |
73 | if (val < 0) | |
74 | return (val * mul - div / 2) / div; | |
75 | else | |
76 | return (val * mul + div / 2) / div; | |
77 | } | |
78 | ||
79 | /* adm9240 internally scales voltage measurements */ | |
80 | static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 }; | |
81 | ||
82 | static inline unsigned int IN_FROM_REG(u8 reg, int n) | |
83 | { | |
84 | return SCALE(reg, nom_mv[n], 192); | |
85 | } | |
86 | ||
87 | static inline u8 IN_TO_REG(unsigned long val, int n) | |
88 | { | |
0fb620c4 GR |
89 | val = clamp_val(val, 0, nom_mv[n] * 255 / 192); |
90 | return SCALE(val, 192, nom_mv[n]); | |
40b5cda2 GC |
91 | } |
92 | ||
93 | /* temperature range: -40..125, 127 disables temperature alarm */ | |
94 | static inline s8 TEMP_TO_REG(long val) | |
95 | { | |
0fb620c4 GR |
96 | val = clamp_val(val, -40000, 127000); |
97 | return SCALE(val, 1, 1000); | |
40b5cda2 GC |
98 | } |
99 | ||
100 | /* two fans, each with low fan speed limit */ | |
101 | static inline unsigned int FAN_FROM_REG(u8 reg, u8 div) | |
102 | { | |
103 | if (!reg) /* error */ | |
104 | return -1; | |
105 | ||
106 | if (reg == 255) | |
107 | return 0; | |
108 | ||
109 | return SCALE(1350000, 1, reg * div); | |
110 | } | |
111 | ||
112 | /* analog out 0..1250mV */ | |
113 | static inline u8 AOUT_TO_REG(unsigned long val) | |
114 | { | |
0fb620c4 GR |
115 | val = clamp_val(val, 0, 1250); |
116 | return SCALE(val, 255, 1250); | |
40b5cda2 GC |
117 | } |
118 | ||
119 | static inline unsigned int AOUT_FROM_REG(u8 reg) | |
120 | { | |
121 | return SCALE(reg, 1250, 255); | |
122 | } | |
123 | ||
40b5cda2 GC |
124 | /* per client data */ |
125 | struct adm9240_data { | |
4f427dcb | 126 | struct device *dev; |
df885d91 | 127 | struct regmap *regmap; |
9a61bf63 | 128 | struct mutex update_lock; |
124b7e34 | 129 | |
40b5cda2 | 130 | u8 fan_div[2]; /* rw fan1_div, read-only accessor */ |
40b5cda2 GC |
131 | u8 vrm; /* -- vrm set on startup, no accessor */ |
132 | }; | |
133 | ||
4341fc3f | 134 | /* write new fan div, callers must hold data->update_lock */ |
124b7e34 | 135 | static int adm9240_write_fan_div(struct adm9240_data *data, int channel, u8 fan_div) |
4341fc3f | 136 | { |
124b7e34 | 137 | unsigned int reg, old, shift = (channel + 2) * 2; |
df885d91 | 138 | int err; |
4341fc3f | 139 | |
df885d91 CP |
140 | err = regmap_read(data->regmap, ADM9240_REG_VID_FAN_DIV, ®); |
141 | if (err < 0) | |
142 | return err; | |
4341fc3f AL |
143 | old = (reg >> shift) & 3; |
144 | reg &= ~(3 << shift); | |
145 | reg |= (fan_div << shift); | |
df885d91 CP |
146 | err = regmap_write(data->regmap, ADM9240_REG_VID_FAN_DIV, reg); |
147 | if (err < 0) | |
148 | return err; | |
4f427dcb | 149 | dev_dbg(data->dev, |
124b7e34 GR |
150 | "fan%d clock divider changed from %lu to %lu\n", |
151 | channel + 1, BIT(old), BIT(fan_div)); | |
df885d91 CP |
152 | |
153 | return 0; | |
4341fc3f AL |
154 | } |
155 | ||
e415e48b | 156 | /* |
40b5cda2 GC |
157 | * set fan speed low limit: |
158 | * | |
159 | * - value is zero: disable fan speed low limit alarm | |
160 | * | |
161 | * - value is below fan speed measurement range: enable fan speed low | |
162 | * limit alarm to be asserted while fan speed too slow to measure | |
163 | * | |
164 | * - otherwise: select fan clock divider to suit fan speed low limit, | |
165 | * measurement code may adjust registers to ensure fan speed reading | |
166 | */ | |
124b7e34 | 167 | static int adm9240_fan_min_write(struct adm9240_data *data, int channel, long val) |
40b5cda2 | 168 | { |
40b5cda2 | 169 | u8 new_div; |
124b7e34 | 170 | u8 fan_min; |
c387e4eb GR |
171 | int err; |
172 | ||
9a61bf63 | 173 | mutex_lock(&data->update_lock); |
40b5cda2 GC |
174 | |
175 | if (!val) { | |
124b7e34 GR |
176 | fan_min = 255; |
177 | new_div = data->fan_div[channel]; | |
40b5cda2 | 178 | |
124b7e34 | 179 | dev_dbg(data->dev, "fan%u low limit set disabled\n", channel + 1); |
40b5cda2 GC |
180 | } else if (val < 1350000 / (8 * 254)) { |
181 | new_div = 3; | |
124b7e34 | 182 | fan_min = 254; |
40b5cda2 | 183 | |
4f427dcb | 184 | dev_dbg(data->dev, "fan%u low limit set minimum %u\n", |
124b7e34 | 185 | channel + 1, FAN_FROM_REG(254, BIT(new_div))); |
40b5cda2 GC |
186 | } else { |
187 | unsigned int new_min = 1350000 / val; | |
188 | ||
189 | new_div = 0; | |
190 | while (new_min > 192 && new_div < 3) { | |
191 | new_div++; | |
192 | new_min /= 2; | |
193 | } | |
194 | if (!new_min) /* keep > 0 */ | |
195 | new_min++; | |
196 | ||
124b7e34 | 197 | fan_min = new_min; |
40b5cda2 | 198 | |
4f427dcb | 199 | dev_dbg(data->dev, "fan%u low limit set fan speed %u\n", |
124b7e34 | 200 | channel + 1, FAN_FROM_REG(new_min, BIT(new_div))); |
40b5cda2 GC |
201 | } |
202 | ||
124b7e34 GR |
203 | if (new_div != data->fan_div[channel]) { |
204 | data->fan_div[channel] = new_div; | |
205 | adm9240_write_fan_div(data, channel, new_div); | |
40b5cda2 | 206 | } |
124b7e34 | 207 | err = regmap_write(data->regmap, ADM9240_REG_FAN_MIN(channel), fan_min); |
40b5cda2 | 208 | |
9a61bf63 | 209 | mutex_unlock(&data->update_lock); |
6a8cdd14 | 210 | |
124b7e34 | 211 | return err; |
40b5cda2 | 212 | } |
6a8cdd14 | 213 | |
b5751116 JL |
214 | static ssize_t cpu0_vid_show(struct device *dev, |
215 | struct device_attribute *attr, char *buf) | |
40b5cda2 | 216 | { |
124b7e34 GR |
217 | struct adm9240_data *data = dev_get_drvdata(dev); |
218 | unsigned int regval; | |
219 | int err; | |
220 | u8 vid; | |
6a8cdd14 | 221 | |
124b7e34 GR |
222 | err = regmap_read(data->regmap, ADM9240_REG_VID_FAN_DIV, ®val); |
223 | if (err < 0) | |
224 | return err; | |
225 | vid = regval & 0x0f; | |
226 | err = regmap_read(data->regmap, ADM9240_REG_VID4, ®val); | |
227 | if (err < 0) | |
228 | return err; | |
229 | vid |= (regval & 1) << 4; | |
230 | return sprintf(buf, "%d\n", vid_from_reg(vid, data->vrm)); | |
40b5cda2 | 231 | } |
b5751116 | 232 | static DEVICE_ATTR_RO(cpu0_vid); |
40b5cda2 | 233 | |
b5751116 JL |
234 | static ssize_t aout_output_show(struct device *dev, |
235 | struct device_attribute *attr, char *buf) | |
40b5cda2 | 236 | { |
124b7e34 GR |
237 | struct adm9240_data *data = dev_get_drvdata(dev); |
238 | unsigned int regval; | |
239 | int err; | |
6a8cdd14 | 240 | |
124b7e34 GR |
241 | err = regmap_read(data->regmap, ADM9240_REG_ANALOG_OUT, ®val); |
242 | if (err) | |
243 | return err; | |
6a8cdd14 | 244 | |
124b7e34 | 245 | return sprintf(buf, "%d\n", AOUT_FROM_REG(regval)); |
40b5cda2 GC |
246 | } |
247 | ||
b5751116 JL |
248 | static ssize_t aout_output_store(struct device *dev, |
249 | struct device_attribute *attr, | |
250 | const char *buf, size_t count) | |
40b5cda2 | 251 | { |
715f69be | 252 | struct adm9240_data *data = dev_get_drvdata(dev); |
c387e4eb GR |
253 | long val; |
254 | int err; | |
255 | ||
256 | err = kstrtol(buf, 10, &val); | |
257 | if (err) | |
258 | return err; | |
40b5cda2 | 259 | |
124b7e34 | 260 | err = regmap_write(data->regmap, ADM9240_REG_ANALOG_OUT, AOUT_TO_REG(val)); |
df885d91 | 261 | return err < 0 ? err : count; |
40b5cda2 | 262 | } |
b5751116 | 263 | static DEVICE_ATTR_RW(aout_output); |
40b5cda2 | 264 | |
715f69be | 265 | static struct attribute *adm9240_attrs[] = { |
681c6f7a | 266 | &dev_attr_aout_output.attr, |
681c6f7a MH |
267 | &dev_attr_cpu0_vid.attr, |
268 | NULL | |
269 | }; | |
270 | ||
715f69be | 271 | ATTRIBUTE_GROUPS(adm9240); |
681c6f7a | 272 | |
40b5cda2 GC |
273 | /*** sensor chip detect and driver install ***/ |
274 | ||
7fae8283 | 275 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
310ec792 | 276 | static int adm9240_detect(struct i2c_client *new_client, |
7fae8283 | 277 | struct i2c_board_info *info) |
40b5cda2 | 278 | { |
7fae8283 | 279 | struct i2c_adapter *adapter = new_client->adapter; |
40b5cda2 | 280 | const char *name = ""; |
7fae8283 | 281 | int address = new_client->addr; |
40b5cda2 GC |
282 | u8 man_id, die_rev; |
283 | ||
284 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
7fae8283 | 285 | return -ENODEV; |
40b5cda2 | 286 | |
52df6440 | 287 | /* verify chip: reg address should match i2c address */ |
69698bde | 288 | if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR) != address) |
52df6440 | 289 | return -ENODEV; |
40b5cda2 | 290 | |
52df6440 JD |
291 | /* check known chip manufacturer */ |
292 | man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID); | |
69698bde | 293 | if (man_id == 0x23) |
40b5cda2 | 294 | name = "adm9240"; |
69698bde | 295 | else if (man_id == 0xda) |
40b5cda2 | 296 | name = "ds1780"; |
69698bde | 297 | else if (man_id == 0x01) |
40b5cda2 | 298 | name = "lm81"; |
69698bde | 299 | else |
52df6440 | 300 | return -ENODEV; |
52df6440 JD |
301 | |
302 | /* successful detect, print chip info */ | |
303 | die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV); | |
304 | dev_info(&adapter->dev, "found %s revision %u\n", | |
305 | man_id == 0x23 ? "ADM9240" : | |
306 | man_id == 0xda ? "DS1780" : "LM81", die_rev); | |
307 | ||
124b7e34 | 308 | strscpy(info->type, name, I2C_NAME_SIZE); |
40b5cda2 | 309 | |
7fae8283 JD |
310 | return 0; |
311 | } | |
40b5cda2 | 312 | |
4f427dcb | 313 | static int adm9240_init_client(struct adm9240_data *data) |
40b5cda2 | 314 | { |
124b7e34 | 315 | unsigned int regval; |
df885d91 CP |
316 | u8 conf, mode; |
317 | int err; | |
318 | ||
319 | err = regmap_raw_read(data->regmap, ADM9240_REG_CONFIG, &conf, 1); | |
320 | if (err < 0) | |
321 | return err; | |
322 | err = regmap_raw_read(data->regmap, ADM9240_REG_TEMP_CONF, &mode, 1); | |
323 | if (err < 0) | |
324 | return err; | |
325 | mode &= 3; | |
40b5cda2 | 326 | |
303760b4 | 327 | data->vrm = vid_which_vrm(); /* need this to report vid as mV */ |
40b5cda2 | 328 | |
4f427dcb GR |
329 | dev_info(data->dev, "Using VRM: %d.%d\n", data->vrm / 10, |
330 | data->vrm % 10); | |
8e8f9289 | 331 | |
40b5cda2 GC |
332 | if (conf & 1) { /* measurement cycle running: report state */ |
333 | ||
4f427dcb GR |
334 | dev_info(data->dev, "status: config 0x%02x mode %u\n", |
335 | conf, mode); | |
40b5cda2 GC |
336 | |
337 | } else { /* cold start: open limits before starting chip */ | |
338 | int i; | |
339 | ||
c387e4eb | 340 | for (i = 0; i < 6; i++) { |
df885d91 CP |
341 | err = regmap_write(data->regmap, |
342 | ADM9240_REG_IN_MIN(i), 0); | |
343 | if (err < 0) | |
344 | return err; | |
345 | err = regmap_write(data->regmap, | |
346 | ADM9240_REG_IN_MAX(i), 255); | |
347 | if (err < 0) | |
348 | return err; | |
40b5cda2 | 349 | } |
10d09773 | 350 | for (i = 0; i < 2; i++) { |
df885d91 | 351 | err = regmap_write(data->regmap, |
124b7e34 | 352 | ADM9240_REG_FAN_MIN(i), 255); |
df885d91 CP |
353 | if (err < 0) |
354 | return err; | |
10d09773 CP |
355 | } |
356 | for (i = 0; i < 2; i++) { | |
df885d91 | 357 | err = regmap_write(data->regmap, |
124b7e34 | 358 | ADM9240_REG_TEMP_MAX(i), 127); |
df885d91 CP |
359 | if (err < 0) |
360 | return err; | |
10d09773 | 361 | } |
40b5cda2 GC |
362 | |
363 | /* start measurement cycle */ | |
df885d91 CP |
364 | err = regmap_write(data->regmap, ADM9240_REG_CONFIG, 1); |
365 | if (err < 0) | |
366 | return err; | |
40b5cda2 | 367 | |
4f427dcb | 368 | dev_info(data->dev, |
b55f3757 | 369 | "cold start: config was 0x%02x mode %u\n", conf, mode); |
40b5cda2 | 370 | } |
df885d91 | 371 | |
124b7e34 GR |
372 | /* read fan divs */ |
373 | err = regmap_read(data->regmap, ADM9240_REG_VID_FAN_DIV, ®val); | |
374 | if (err < 0) | |
375 | return err; | |
376 | data->fan_div[0] = (regval >> 4) & 3; | |
377 | data->fan_div[1] = (regval >> 6) & 3; | |
378 | return 0; | |
379 | } | |
380 | ||
381 | static int adm9240_chip_read(struct device *dev, u32 attr, long *val) | |
382 | { | |
383 | struct adm9240_data *data = dev_get_drvdata(dev); | |
384 | u8 regs[2]; | |
385 | int err; | |
386 | ||
387 | switch (attr) { | |
388 | case hwmon_chip_alarms: | |
389 | err = regmap_bulk_read(data->regmap, ADM9240_REG_INT(0), ®s, 2); | |
390 | if (err < 0) | |
391 | return err; | |
392 | *val = regs[0] | regs[1] << 8; | |
393 | break; | |
394 | default: | |
395 | return -EOPNOTSUPP; | |
396 | } | |
397 | return 0; | |
398 | } | |
399 | ||
400 | static int adm9240_intrusion_read(struct device *dev, u32 attr, long *val) | |
401 | { | |
402 | struct adm9240_data *data = dev_get_drvdata(dev); | |
403 | unsigned int regval; | |
404 | int err; | |
405 | ||
406 | switch (attr) { | |
407 | case hwmon_intrusion_alarm: | |
408 | err = regmap_read(data->regmap, ADM9240_REG_INT(1), ®val); | |
409 | if (err < 0) | |
410 | return err; | |
411 | *val = !!(regval & BIT(4)); | |
412 | break; | |
413 | default: | |
414 | return -EOPNOTSUPP; | |
415 | } | |
416 | return 0; | |
417 | } | |
418 | ||
419 | static int adm9240_intrusion_write(struct device *dev, u32 attr, long val) | |
420 | { | |
421 | struct adm9240_data *data = dev_get_drvdata(dev); | |
422 | int err; | |
423 | ||
424 | switch (attr) { | |
425 | case hwmon_intrusion_alarm: | |
426 | if (val) | |
427 | return -EINVAL; | |
428 | err = regmap_write(data->regmap, ADM9240_REG_CHASSIS_CLEAR, 0x80); | |
429 | if (err < 0) | |
430 | return err; | |
431 | dev_dbg(data->dev, "chassis intrusion latch cleared\n"); | |
432 | break; | |
433 | default: | |
434 | return -EOPNOTSUPP; | |
435 | } | |
436 | return 0; | |
437 | } | |
438 | ||
439 | static int adm9240_in_read(struct device *dev, u32 attr, int channel, long *val) | |
440 | { | |
441 | struct adm9240_data *data = dev_get_drvdata(dev); | |
442 | unsigned int regval; | |
443 | int reg; | |
444 | int err; | |
445 | ||
446 | switch (attr) { | |
447 | case hwmon_in_input: | |
448 | reg = ADM9240_REG_IN(channel); | |
449 | break; | |
450 | case hwmon_in_min: | |
451 | reg = ADM9240_REG_IN_MIN(channel); | |
452 | break; | |
453 | case hwmon_in_max: | |
454 | reg = ADM9240_REG_IN_MAX(channel); | |
455 | break; | |
456 | case hwmon_in_alarm: | |
457 | if (channel < 4) { | |
458 | reg = ADM9240_REG_INT(0); | |
459 | } else { | |
460 | reg = ADM9240_REG_INT(1); | |
461 | channel -= 4; | |
462 | } | |
463 | err = regmap_read(data->regmap, reg, ®val); | |
464 | if (err < 0) | |
465 | return err; | |
466 | *val = !!(regval & BIT(channel)); | |
467 | return 0; | |
468 | default: | |
469 | return -EOPNOTSUPP; | |
470 | } | |
471 | err = regmap_read(data->regmap, reg, ®val); | |
472 | if (err < 0) | |
473 | return err; | |
474 | *val = IN_FROM_REG(regval, channel); | |
df885d91 | 475 | return 0; |
40b5cda2 GC |
476 | } |
477 | ||
124b7e34 GR |
478 | static int adm9240_in_write(struct device *dev, u32 attr, int channel, long val) |
479 | { | |
480 | struct adm9240_data *data = dev_get_drvdata(dev); | |
481 | int reg; | |
482 | ||
483 | switch (attr) { | |
484 | case hwmon_in_min: | |
485 | reg = ADM9240_REG_IN_MIN(channel); | |
486 | break; | |
487 | case hwmon_in_max: | |
3b5169c2 | 488 | reg = ADM9240_REG_IN_MAX(channel); |
124b7e34 GR |
489 | break; |
490 | default: | |
491 | return -EOPNOTSUPP; | |
492 | } | |
493 | return regmap_write(data->regmap, reg, IN_TO_REG(val, channel)); | |
494 | } | |
495 | ||
496 | static int adm9240_fan_read(struct device *dev, u32 attr, int channel, long *val) | |
497 | { | |
498 | struct adm9240_data *data = dev_get_drvdata(dev); | |
499 | unsigned int regval; | |
500 | int err; | |
501 | ||
502 | switch (attr) { | |
503 | case hwmon_fan_input: | |
504 | err = regmap_read(data->regmap, ADM9240_REG_FAN(channel), ®val); | |
505 | if (err < 0) | |
506 | return err; | |
507 | if (regval == 255 && data->fan_div[channel] < 3) { | |
508 | /* adjust fan clock divider on overflow */ | |
509 | err = adm9240_write_fan_div(data, channel, | |
510 | ++data->fan_div[channel]); | |
511 | if (err) | |
512 | return err; | |
513 | } | |
514 | *val = FAN_FROM_REG(regval, BIT(data->fan_div[channel])); | |
515 | break; | |
516 | case hwmon_fan_div: | |
517 | *val = BIT(data->fan_div[channel]); | |
518 | break; | |
519 | case hwmon_fan_min: | |
520 | err = regmap_read(data->regmap, ADM9240_REG_FAN_MIN(channel), ®val); | |
521 | if (err < 0) | |
522 | return err; | |
523 | *val = FAN_FROM_REG(regval, BIT(data->fan_div[channel])); | |
524 | break; | |
525 | case hwmon_fan_alarm: | |
526 | err = regmap_read(data->regmap, ADM9240_REG_INT(0), ®val); | |
527 | if (err < 0) | |
528 | return err; | |
529 | *val = !!(regval & BIT(channel + 6)); | |
530 | break; | |
531 | default: | |
532 | return -EOPNOTSUPP; | |
533 | } | |
534 | return 0; | |
535 | } | |
536 | ||
537 | static int adm9240_fan_write(struct device *dev, u32 attr, int channel, long val) | |
538 | { | |
539 | struct adm9240_data *data = dev_get_drvdata(dev); | |
540 | int err; | |
541 | ||
542 | switch (attr) { | |
543 | case hwmon_fan_min: | |
544 | err = adm9240_fan_min_write(data, channel, val); | |
545 | if (err < 0) | |
546 | return err; | |
547 | break; | |
548 | default: | |
549 | return -EOPNOTSUPP; | |
550 | } | |
551 | return 0; | |
552 | } | |
553 | ||
554 | static int adm9240_temp_read(struct device *dev, u32 attr, int channel, long *val) | |
555 | { | |
556 | struct adm9240_data *data = dev_get_drvdata(dev); | |
557 | unsigned int regval; | |
558 | int err, temp; | |
559 | ||
560 | switch (attr) { | |
561 | case hwmon_temp_input: | |
562 | err = regmap_read(data->regmap, ADM9240_REG_TEMP, ®val); | |
563 | if (err < 0) | |
564 | return err; | |
565 | temp = regval << 1; | |
566 | err = regmap_read(data->regmap, ADM9240_REG_TEMP_CONF, ®val); | |
567 | if (err < 0) | |
568 | return err; | |
569 | temp |= regval >> 7; | |
570 | *val = sign_extend32(temp, 8) * 500; | |
571 | break; | |
572 | case hwmon_temp_max: | |
573 | err = regmap_read(data->regmap, ADM9240_REG_TEMP_MAX(0), ®val); | |
574 | if (err < 0) | |
575 | return err; | |
576 | *val = (s8)regval * 1000; | |
577 | break; | |
578 | case hwmon_temp_max_hyst: | |
579 | err = regmap_read(data->regmap, ADM9240_REG_TEMP_MAX(1), ®val); | |
580 | if (err < 0) | |
581 | return err; | |
582 | *val = (s8)regval * 1000; | |
583 | break; | |
584 | case hwmon_temp_alarm: | |
585 | err = regmap_read(data->regmap, ADM9240_REG_INT(0), ®val); | |
586 | if (err < 0) | |
587 | return err; | |
588 | *val = !!(regval & BIT(4)); | |
589 | break; | |
590 | default: | |
591 | return -EOPNOTSUPP; | |
592 | } | |
593 | return 0; | |
594 | } | |
595 | ||
596 | static int adm9240_temp_write(struct device *dev, u32 attr, int channel, long val) | |
597 | { | |
598 | struct adm9240_data *data = dev_get_drvdata(dev); | |
599 | int reg; | |
600 | ||
601 | switch (attr) { | |
602 | case hwmon_temp_max: | |
603 | reg = ADM9240_REG_TEMP_MAX(0); | |
604 | break; | |
605 | case hwmon_temp_max_hyst: | |
606 | reg = ADM9240_REG_TEMP_MAX(1); | |
607 | break; | |
608 | default: | |
609 | return -EOPNOTSUPP; | |
610 | } | |
611 | return regmap_write(data->regmap, reg, TEMP_TO_REG(val)); | |
612 | } | |
613 | ||
614 | static int adm9240_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, | |
615 | int channel, long *val) | |
616 | { | |
617 | switch (type) { | |
618 | case hwmon_chip: | |
619 | return adm9240_chip_read(dev, attr, val); | |
620 | case hwmon_intrusion: | |
621 | return adm9240_intrusion_read(dev, attr, val); | |
622 | case hwmon_in: | |
623 | return adm9240_in_read(dev, attr, channel, val); | |
624 | case hwmon_fan: | |
625 | return adm9240_fan_read(dev, attr, channel, val); | |
626 | case hwmon_temp: | |
627 | return adm9240_temp_read(dev, attr, channel, val); | |
628 | default: | |
629 | return -EOPNOTSUPP; | |
630 | } | |
631 | } | |
632 | ||
633 | static int adm9240_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, | |
634 | int channel, long val) | |
635 | { | |
636 | switch (type) { | |
637 | case hwmon_intrusion: | |
638 | return adm9240_intrusion_write(dev, attr, val); | |
639 | case hwmon_in: | |
640 | return adm9240_in_write(dev, attr, channel, val); | |
641 | case hwmon_fan: | |
642 | return adm9240_fan_write(dev, attr, channel, val); | |
643 | case hwmon_temp: | |
644 | return adm9240_temp_write(dev, attr, channel, val); | |
645 | default: | |
646 | return -EOPNOTSUPP; | |
647 | } | |
648 | } | |
649 | ||
650 | static umode_t adm9240_is_visible(const void *_data, enum hwmon_sensor_types type, | |
651 | u32 attr, int channel) | |
652 | { | |
653 | umode_t mode = 0; | |
654 | ||
655 | switch (type) { | |
656 | case hwmon_chip: | |
657 | switch (attr) { | |
658 | case hwmon_chip_alarms: | |
659 | mode = 0444; | |
660 | break; | |
661 | default: | |
662 | break; | |
663 | } | |
664 | break; | |
665 | case hwmon_intrusion: | |
666 | switch (attr) { | |
667 | case hwmon_intrusion_alarm: | |
668 | mode = 0644; | |
669 | break; | |
670 | default: | |
671 | break; | |
672 | } | |
673 | break; | |
674 | case hwmon_temp: | |
675 | switch (attr) { | |
676 | case hwmon_temp: | |
677 | case hwmon_temp_alarm: | |
678 | mode = 0444; | |
679 | break; | |
680 | case hwmon_temp_max: | |
681 | case hwmon_temp_max_hyst: | |
682 | mode = 0644; | |
683 | break; | |
684 | default: | |
685 | break; | |
686 | } | |
687 | break; | |
688 | case hwmon_fan: | |
689 | switch (attr) { | |
690 | case hwmon_fan_input: | |
691 | case hwmon_fan_div: | |
692 | case hwmon_fan_alarm: | |
693 | mode = 0444; | |
694 | break; | |
695 | case hwmon_fan_min: | |
696 | mode = 0644; | |
697 | break; | |
698 | default: | |
699 | break; | |
700 | } | |
701 | break; | |
702 | case hwmon_in: | |
703 | switch (attr) { | |
704 | case hwmon_in_input: | |
705 | case hwmon_in_alarm: | |
706 | mode = 0444; | |
707 | break; | |
708 | case hwmon_in_min: | |
709 | case hwmon_in_max: | |
710 | mode = 0644; | |
711 | break; | |
712 | default: | |
713 | break; | |
714 | } | |
715 | break; | |
716 | default: | |
717 | break; | |
718 | } | |
719 | return mode; | |
720 | } | |
721 | ||
722 | static const struct hwmon_ops adm9240_hwmon_ops = { | |
723 | .is_visible = adm9240_is_visible, | |
724 | .read = adm9240_read, | |
725 | .write = adm9240_write, | |
726 | }; | |
727 | ||
728 | static const struct hwmon_channel_info *adm9240_info[] = { | |
729 | HWMON_CHANNEL_INFO(chip, HWMON_C_ALARMS), | |
730 | HWMON_CHANNEL_INFO(intrusion, HWMON_INTRUSION_ALARM), | |
731 | HWMON_CHANNEL_INFO(temp, | |
732 | HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | HWMON_T_ALARM), | |
733 | HWMON_CHANNEL_INFO(in, | |
734 | HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, | |
735 | HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, | |
736 | HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, | |
737 | HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, | |
738 | HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, | |
739 | HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM), | |
740 | HWMON_CHANNEL_INFO(fan, | |
741 | HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_DIV | HWMON_F_ALARM, | |
742 | HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_DIV | HWMON_F_ALARM), | |
743 | NULL | |
744 | }; | |
745 | ||
746 | static const struct hwmon_chip_info adm9240_chip_info = { | |
747 | .ops = &adm9240_hwmon_ops, | |
748 | .info = adm9240_info, | |
749 | }; | |
750 | ||
751 | static bool adm9240_volatile_reg(struct device *dev, unsigned int reg) | |
752 | { | |
753 | switch (reg) { | |
754 | case ADM9240_REG_IN(0) ... ADM9240_REG_IN(5): | |
755 | case ADM9240_REG_FAN(0) ... ADM9240_REG_FAN(1): | |
756 | case ADM9240_REG_INT(0) ... ADM9240_REG_INT(1): | |
757 | case ADM9240_REG_TEMP: | |
758 | case ADM9240_REG_TEMP_CONF: | |
759 | case ADM9240_REG_VID_FAN_DIV: | |
760 | case ADM9240_REG_VID4: | |
761 | case ADM9240_REG_ANALOG_OUT: | |
762 | return true; | |
763 | default: | |
764 | return false; | |
765 | } | |
766 | } | |
767 | ||
df885d91 CP |
768 | static const struct regmap_config adm9240_regmap_config = { |
769 | .reg_bits = 8, | |
770 | .val_bits = 8, | |
771 | .use_single_read = true, | |
772 | .use_single_write = true, | |
124b7e34 | 773 | .volatile_reg = adm9240_volatile_reg, |
df885d91 CP |
774 | }; |
775 | ||
124b7e34 | 776 | static int adm9240_probe(struct i2c_client *client) |
40b5cda2 | 777 | { |
124b7e34 | 778 | struct device *dev = &client->dev; |
715f69be | 779 | struct device *hwmon_dev; |
4341fc3f | 780 | struct adm9240_data *data; |
df885d91 | 781 | int err; |
40b5cda2 | 782 | |
715f69be | 783 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
4341fc3f AL |
784 | if (!data) |
785 | return -ENOMEM; | |
40b5cda2 | 786 | |
4f427dcb | 787 | data->dev = dev; |
4341fc3f | 788 | mutex_init(&data->update_lock); |
124b7e34 | 789 | data->regmap = devm_regmap_init_i2c(client, &adm9240_regmap_config); |
df885d91 CP |
790 | if (IS_ERR(data->regmap)) |
791 | return PTR_ERR(data->regmap); | |
40b5cda2 | 792 | |
4f427dcb | 793 | err = adm9240_init_client(data); |
df885d91 CP |
794 | if (err < 0) |
795 | return err; | |
40b5cda2 | 796 | |
124b7e34 GR |
797 | hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, data, |
798 | &adm9240_chip_info, | |
799 | adm9240_groups); | |
715f69be | 800 | return PTR_ERR_OR_ZERO(hwmon_dev); |
4341fc3f | 801 | } |
40b5cda2 | 802 | |
4341fc3f AL |
803 | static const struct i2c_device_id adm9240_id[] = { |
804 | { "adm9240", adm9240 }, | |
805 | { "ds1780", ds1780 }, | |
806 | { "lm81", lm81 }, | |
807 | { } | |
808 | }; | |
809 | MODULE_DEVICE_TABLE(i2c, adm9240_id); | |
40b5cda2 | 810 | |
4341fc3f AL |
811 | static struct i2c_driver adm9240_driver = { |
812 | .class = I2C_CLASS_HWMON, | |
813 | .driver = { | |
814 | .name = "adm9240", | |
815 | }, | |
67487038 | 816 | .probe_new = adm9240_probe, |
4341fc3f AL |
817 | .id_table = adm9240_id, |
818 | .detect = adm9240_detect, | |
819 | .address_list = normal_i2c, | |
820 | }; | |
40b5cda2 | 821 | |
f0967eea | 822 | module_i2c_driver(adm9240_driver); |
40b5cda2 GC |
823 | |
824 | MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " | |
2ca7b961 | 825 | "Grant Coady <gcoady.lk@gmail.com> and others"); |
40b5cda2 GC |
826 | MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); |
827 | MODULE_LICENSE("GPL"); |