xref: /openbmc/qemu/hw/sensor/max31785.c (revision ad80e367)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Maxim MAX31785 PMBus 6-Channel Fan Controller
4  *
5  * Datasheet:
6  * https://datasheets.maximintegrated.com/en/ds/MAX31785.pdf
7  *
8  * Copyright(c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
9  */
10 
11 #include "qemu/osdep.h"
12 #include "hw/i2c/pmbus_device.h"
13 #include "hw/irq.h"
14 #include "migration/vmstate.h"
15 #include "qapi/error.h"
16 #include "qapi/visitor.h"
17 #include "qemu/log.h"
18 #include "qemu/module.h"
19 
20 #define TYPE_MAX31785 "max31785"
21 #define MAX31785(obj) OBJECT_CHECK(MAX31785State, (obj), TYPE_MAX31785)
22 
23 /* MAX31785 mfr specific PMBus commands */
24 #define MAX31785_MFR_MODE               0xD1
25 #define MAX31785_MFR_PSEN_CONFIG        0xD2
26 #define MAX31785_MFR_VOUT_PEAK          0xD4
27 #define MAX31785_MFR_TEMPERATURE_PEAK   0xD6
28 #define MAX31785_MFR_VOUT_MIN           0xD7
29 #define MAX31785_MFR_FAULT_RESPONSE     0xD9
30 #define MAX31785_MFR_NV_FAULT_LOG       0xDC
31 #define MAX31785_MFR_TIME_COUNT         0xDD
32 #define MAX31785_MFR_TEMP_SENSOR_CONFIG 0xF0
33 #define MAX31785_MFR_FAN_CONFIG         0xF1
34 #define MAX31785_MFR_FAN_LUT            0xF2
35 #define MAX31785_MFR_READ_FAN_PWM       0xF3
36 #define MAX31785_MFR_FAN_FAULT_LIMIT    0xF5
37 #define MAX31785_MFR_FAN_WARN_LIMIT     0xF6
38 #define MAX31785_MFR_FAN_RUN_TIME       0xF7
39 #define MAX31785_MFR_FAN_PWM_AVG        0xF8
40 #define MAX31785_MFR_FAN_PWM2RPM        0xF9
41 
42 /* defaults as per the data sheet */
43 #define MAX31785_DEFAULT_CAPABILITY            0x10
44 #define MAX31785_DEFAULT_VOUT_MODE             0x40
45 #define MAX31785_DEFAULT_VOUT_SCALE_MONITOR    0x7FFF
46 #define MAX31785_DEFAULT_FAN_COMMAND_1         0x7FFF
47 #define MAX31785_DEFAULT_OV_FAULT_LIMIT        0x7FFF
48 #define MAX31785_DEFAULT_OV_WARN_LIMIT         0x7FFF
49 #define MAX31785_DEFAULT_OT_FAULT_LIMIT        0x7FFF
50 #define MAX31785_DEFAULT_OT_WARN_LIMIT         0x7FFF
51 #define MAX31785_DEFAULT_PMBUS_REVISION        0x11
52 #define MAX31785_DEFAULT_MFR_ID                0x4D
53 #define MAX31785_DEFAULT_MFR_MODEL             0x53
54 #define MAX31785_DEFAULT_MFR_REVISION          0x3030
55 #define MAX31785A_DEFAULT_MFR_REVISION         0x3040
56 #define MAX31785B_DEFAULT_MFR_REVISION         0x3061
57 #define MAX31785B_DEFAULT_MFR_TEMPERATURE_PEAK 0x8000
58 #define MAX31785B_DEFAULT_MFR_VOUT_MIN         0x7FFF
59 #define MAX31785_DEFAULT_TEXT                  0x3130313031303130
60 
61 /* MAX31785 pages */
62 #define MAX31785_TOTAL_NUM_PAGES      23
63 #define MAX31785_FAN_PAGES            6
64 #define MAX31785_MIN_FAN_PAGE         0
65 #define MAX31785_MAX_FAN_PAGE         5
66 #define MAX31785_MIN_TEMP_PAGE        6
67 #define MAX31785_MAX_TEMP_PAGE        16
68 #define MAX31785_MIN_ADC_VOLTAGE_PAGE 17
69 #define MAX31785_MAX_ADC_VOLTAGE_PAGE 22
70 
71 /* FAN_CONFIG_1_2 */
72 #define MAX31785_MFR_FAN_CONFIG                0xF1
73 #define MAX31785_FAN_CONFIG_ENABLE             BIT(7)
74 #define MAX31785_FAN_CONFIG_RPM_PWM            BIT(6)
75 #define MAX31785_FAN_CONFIG_PULSE(pulse)       (pulse << 4)
76 #define MAX31785_DEFAULT_FAN_CONFIG_1_2(pulse)                                 \
77     (MAX31785_FAN_CONFIG_ENABLE | MAX31785_FAN_CONFIG_PULSE(pulse))
78 #define MAX31785_DEFAULT_MFR_FAN_CONFIG        0x0000
79 
80 /* fan speed in RPM */
81 #define MAX31785_DEFAULT_FAN_SPEED   0x7fff
82 #define MAX31785_DEFAULT_FAN_STATUS  0x00
83 
84 #define MAX31785_DEFAULT_FAN_MAX_PWM 0x2710
85 
86 /*
87  * MAX31785State:
88  * @code: The command code received
89  * @page: Each page corresponds to a device monitored by the Max 31785
90  * The page register determines the available commands depending on device
91  * _____________________________________________________________________________
92  * |   0   |  Fan Connected to PWM0                                            |
93  * |_______|___________________________________________________________________|
94  * |   1   |  Fan Connected to PWM1                                            |
95  * |_______|___________________________________________________________________|
96  * |   2   |  Fan Connected to PWM2                                            |
97  * |_______|___________________________________________________________________|
98  * |   3   |  Fan Connected to PWM3                                            |
99  * |_______|___________________________________________________________________|
100  * |   4   |  Fan Connected to PWM4                                            |
101  * |_______|___________________________________________________________________|
102  * |   5   |  Fan Connected to PWM5                                            |
103  * |_______|___________________________________________________________________|
104  * |   6   |  Remote Thermal Diode Connected to ADC 0                          |
105  * |_______|___________________________________________________________________|
106  * |   7   |  Remote Thermal Diode Connected to ADC 1                          |
107  * |_______|___________________________________________________________________|
108  * |   8   |  Remote Thermal Diode Connected to ADC 2                          |
109  * |_______|___________________________________________________________________|
110  * |   9   |  Remote Thermal Diode Connected to ADC 3                          |
111  * |_______|___________________________________________________________________|
112  * |  10   |  Remote Thermal Diode Connected to ADC 4                          |
113  * |_______|___________________________________________________________________|
114  * |  11   |  Remote Thermal Diode Connected to ADC 5                          |
115  * |_______|___________________________________________________________________|
116  * |  12   |  Internal Temperature Sensor                                      |
117  * |_______|___________________________________________________________________|
118  * |  13   |  Remote I2C Temperature Sensor with Address 0                     |
119  * |_______|___________________________________________________________________|
120  * |  14   |  Remote I2C Temperature Sensor with Address 1                     |
121  * |_______|___________________________________________________________________|
122  * |  15   |  Remote I2C Temperature Sensor with Address 2                     |
123  * |_______|___________________________________________________________________|
124  * |  16   |  Remote I2C Temperature Sensor with Address 3                     |
125  * |_______|___________________________________________________________________|
126  * |  17   |  Remote I2C Temperature Sensor with Address 4                     |
127  * |_______|___________________________________________________________________|
128  * |  17   |  Remote Voltage Connected to ADC0                                 |
129  * |_______|___________________________________________________________________|
130  * |  18   |  Remote Voltage Connected to ADC1                                 |
131  * |_______|___________________________________________________________________|
132  * |  19   |  Remote Voltage Connected to ADC2                                 |
133  * |_______|___________________________________________________________________|
134  * |  20   |  Remote Voltage Connected to ADC3                                 |
135  * |_______|___________________________________________________________________|
136  * |  21   |  Remote Voltage Connected to ADC4                                 |
137  * |_______|___________________________________________________________________|
138  * |  22   |  Remote Voltage Connected to ADC5                                 |
139  * |_______|___________________________________________________________________|
140  * |23-254 |  Reserved                                                         |
141  * |_______|___________________________________________________________________|
142  * |  255  |  Applies to all pages                                             |
143  * |_______|___________________________________________________________________|
144  */
145 
146 /* Place holder to save the max31785 mfr specific registers */
147 typedef struct MAX31785State {
148     PMBusDevice parent;
149     uint16_t mfr_mode[MAX31785_TOTAL_NUM_PAGES];
150     uint16_t vout_peak[MAX31785_TOTAL_NUM_PAGES];
151     uint16_t temperature_peak[MAX31785_TOTAL_NUM_PAGES];
152     uint16_t vout_min[MAX31785_TOTAL_NUM_PAGES];
153     uint8_t  fault_response[MAX31785_TOTAL_NUM_PAGES];
154     uint32_t time_count[MAX31785_TOTAL_NUM_PAGES];
155     uint16_t temp_sensor_config[MAX31785_TOTAL_NUM_PAGES];
156     uint16_t fan_config[MAX31785_TOTAL_NUM_PAGES];
157     uint16_t read_fan_pwm[MAX31785_TOTAL_NUM_PAGES];
158     uint16_t fan_fault_limit[MAX31785_TOTAL_NUM_PAGES];
159     uint16_t fan_warn_limit[MAX31785_TOTAL_NUM_PAGES];
160     uint16_t fan_run_time[MAX31785_TOTAL_NUM_PAGES];
161     uint16_t fan_pwm_avg[MAX31785_TOTAL_NUM_PAGES];
162     uint64_t fan_pwm2rpm[MAX31785_TOTAL_NUM_PAGES];
163     uint64_t mfr_location;
164     uint64_t mfr_date;
165     uint64_t mfr_serial;
166     uint16_t mfr_revision;
167 } MAX31785State;
168 
max31785_read_byte(PMBusDevice * pmdev)169 static uint8_t max31785_read_byte(PMBusDevice *pmdev)
170 {
171     MAX31785State *s = MAX31785(pmdev);
172     switch (pmdev->code) {
173 
174     case PMBUS_FAN_CONFIG_1_2:
175         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
176             pmbus_send8(pmdev, pmdev->pages[pmdev->page].fan_config_1_2);
177         }
178         break;
179 
180     case PMBUS_FAN_COMMAND_1:
181         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
182             pmbus_send16(pmdev, pmdev->pages[pmdev->page].fan_command_1);
183         }
184         break;
185 
186     case PMBUS_READ_FAN_SPEED_1:
187         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
188             pmbus_send16(pmdev, pmdev->pages[pmdev->page].read_fan_speed_1);
189         }
190         break;
191 
192     case PMBUS_STATUS_FANS_1_2:
193         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
194             pmbus_send16(pmdev, pmdev->pages[pmdev->page].status_fans_1_2);
195         }
196         break;
197 
198     case PMBUS_MFR_REVISION:
199         pmbus_send16(pmdev, MAX31785_DEFAULT_MFR_REVISION);
200         break;
201 
202     case PMBUS_MFR_ID:
203         pmbus_send8(pmdev, 0x4d); /* Maxim */
204         break;
205 
206     case PMBUS_MFR_MODEL:
207         pmbus_send8(pmdev, 0x53);
208         break;
209 
210     case PMBUS_MFR_LOCATION:
211         pmbus_send64(pmdev, s->mfr_location);
212         break;
213 
214     case PMBUS_MFR_DATE:
215         pmbus_send64(pmdev, s->mfr_date);
216         break;
217 
218     case PMBUS_MFR_SERIAL:
219         pmbus_send64(pmdev, s->mfr_serial);
220         break;
221 
222     case MAX31785_MFR_MODE:
223         pmbus_send16(pmdev, s->mfr_mode[pmdev->page]);
224         break;
225 
226     case MAX31785_MFR_VOUT_PEAK:
227         if ((pmdev->page >= MAX31785_MIN_ADC_VOLTAGE_PAGE) &&
228             (pmdev->page <= MAX31785_MAX_ADC_VOLTAGE_PAGE)) {
229             pmbus_send16(pmdev, s->vout_peak[pmdev->page]);
230         }
231         break;
232 
233     case MAX31785_MFR_TEMPERATURE_PEAK:
234         if ((pmdev->page >= MAX31785_MIN_TEMP_PAGE) &&
235             (pmdev->page <= MAX31785_MAX_TEMP_PAGE)) {
236             pmbus_send16(pmdev, s->temperature_peak[pmdev->page]);
237         }
238         break;
239 
240     case MAX31785_MFR_VOUT_MIN:
241         if ((pmdev->page >= MAX31785_MIN_ADC_VOLTAGE_PAGE) &&
242             (pmdev->page <= MAX31785_MAX_ADC_VOLTAGE_PAGE)) {
243             pmbus_send16(pmdev, s->vout_min[pmdev->page]);
244         }
245         break;
246 
247     case MAX31785_MFR_FAULT_RESPONSE:
248         pmbus_send8(pmdev, s->fault_response[pmdev->page]);
249         break;
250 
251     case MAX31785_MFR_TIME_COUNT: /* R/W 32 */
252         pmbus_send32(pmdev, s->time_count[pmdev->page]);
253         break;
254 
255     case MAX31785_MFR_TEMP_SENSOR_CONFIG: /* R/W 16 */
256         if ((pmdev->page >= MAX31785_MIN_TEMP_PAGE) &&
257             (pmdev->page <= MAX31785_MAX_TEMP_PAGE)) {
258             pmbus_send16(pmdev, s->temp_sensor_config[pmdev->page]);
259         }
260         break;
261 
262     case MAX31785_MFR_FAN_CONFIG: /* R/W 16 */
263         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
264             pmbus_send16(pmdev, s->fan_config[pmdev->page]);
265         }
266         break;
267 
268     case MAX31785_MFR_READ_FAN_PWM: /* R/W 16 */
269         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
270             pmbus_send16(pmdev, s->read_fan_pwm[pmdev->page]);
271         }
272         break;
273 
274     case MAX31785_MFR_FAN_FAULT_LIMIT: /* R/W 16 */
275         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
276             pmbus_send16(pmdev, s->fan_fault_limit[pmdev->page]);
277         }
278         break;
279 
280     case MAX31785_MFR_FAN_WARN_LIMIT: /* R/W 16 */
281         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
282             pmbus_send16(pmdev, s->fan_warn_limit[pmdev->page]);
283         }
284         break;
285 
286     case MAX31785_MFR_FAN_RUN_TIME: /* R/W 16 */
287         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
288             pmbus_send16(pmdev, s->fan_run_time[pmdev->page]);
289         }
290         break;
291 
292     case MAX31785_MFR_FAN_PWM_AVG: /* R/W 16 */
293         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
294             pmbus_send16(pmdev, s->fan_pwm_avg[pmdev->page]);
295         }
296         break;
297 
298     case MAX31785_MFR_FAN_PWM2RPM: /* R/W 64 */
299         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
300             pmbus_send64(pmdev, s->fan_pwm2rpm[pmdev->page]);
301         }
302         break;
303 
304     default:
305         qemu_log_mask(LOG_GUEST_ERROR,
306         "%s: reading from unsupported register: 0x%02x\n",
307         __func__, pmdev->code);
308         break;
309     }
310 
311     return 0xFF;
312 }
313 
max31785_write_data(PMBusDevice * pmdev,const uint8_t * buf,uint8_t len)314 static int max31785_write_data(PMBusDevice *pmdev, const uint8_t *buf,
315                                uint8_t len)
316 {
317     MAX31785State *s = MAX31785(pmdev);
318     if (len == 0) {
319         qemu_log_mask(LOG_GUEST_ERROR, "%s: writing empty data\n", __func__);
320         return -1;
321     }
322 
323     pmdev->code = buf[0]; /* PMBus command code */
324 
325     if (len == 1) {
326         return 0;
327     }
328 
329     /* Exclude command code from buffer */
330     buf++;
331     len--;
332 
333     switch (pmdev->code) {
334 
335     case PMBUS_FAN_CONFIG_1_2:
336         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
337             pmdev->pages[pmdev->page].fan_config_1_2 = pmbus_receive8(pmdev);
338         }
339         break;
340 
341     case PMBUS_FAN_COMMAND_1:
342         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
343             pmdev->pages[pmdev->page].fan_command_1 = pmbus_receive16(pmdev);
344             pmdev->pages[pmdev->page].read_fan_speed_1 =
345                 ((MAX31785_DEFAULT_FAN_SPEED / MAX31785_DEFAULT_FAN_MAX_PWM) *
346                 pmdev->pages[pmdev->page].fan_command_1);
347         }
348         break;
349 
350     case PMBUS_MFR_LOCATION: /* R/W 64 */
351         s->mfr_location = pmbus_receive64(pmdev);
352         break;
353 
354     case PMBUS_MFR_DATE: /* R/W 64 */
355         s->mfr_date = pmbus_receive64(pmdev);
356         break;
357 
358     case PMBUS_MFR_SERIAL: /* R/W 64 */
359         s->mfr_serial = pmbus_receive64(pmdev);
360         break;
361 
362     case MAX31785_MFR_MODE: /* R/W word */
363         s->mfr_mode[pmdev->page] = pmbus_receive16(pmdev);
364         break;
365 
366     case MAX31785_MFR_VOUT_PEAK: /* R/W word */
367         if ((pmdev->page >= MAX31785_MIN_ADC_VOLTAGE_PAGE) &&
368             (pmdev->page <= MAX31785_MAX_ADC_VOLTAGE_PAGE)) {
369             s->vout_peak[pmdev->page] = pmbus_receive16(pmdev);
370         }
371         break;
372 
373     case MAX31785_MFR_TEMPERATURE_PEAK: /* R/W word */
374         if ((pmdev->page >= 6) && (pmdev->page <= 16)) {
375             s->temperature_peak[pmdev->page] = pmbus_receive16(pmdev);
376         }
377         break;
378 
379     case MAX31785_MFR_VOUT_MIN: /* R/W word */
380         if ((pmdev->page >= MAX31785_MIN_ADC_VOLTAGE_PAGE) &&
381             (pmdev->page <= MAX31785_MAX_ADC_VOLTAGE_PAGE)) {
382             s->vout_min[pmdev->page] = pmbus_receive16(pmdev);
383         }
384         break;
385 
386     case MAX31785_MFR_FAULT_RESPONSE: /* R/W 8 */
387         s->fault_response[pmdev->page] = pmbus_receive8(pmdev);
388         break;
389 
390     case MAX31785_MFR_TIME_COUNT: /* R/W 32 */
391         s->time_count[pmdev->page] = pmbus_receive32(pmdev);
392         break;
393 
394     case MAX31785_MFR_TEMP_SENSOR_CONFIG: /* R/W 16 */
395         if ((pmdev->page >= MAX31785_MIN_TEMP_PAGE) &&
396             (pmdev->page <= MAX31785_MAX_TEMP_PAGE)) {
397             s->temp_sensor_config[pmdev->page] = pmbus_receive16(pmdev);
398         }
399         break;
400 
401     case MAX31785_MFR_FAN_CONFIG: /* R/W 16 */
402         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
403             s->fan_config[pmdev->page] = pmbus_receive16(pmdev);
404         }
405         break;
406 
407     case MAX31785_MFR_FAN_FAULT_LIMIT: /* R/W 16 */
408         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
409             s->fan_fault_limit[pmdev->page] = pmbus_receive16(pmdev);
410         }
411         break;
412 
413     case MAX31785_MFR_FAN_WARN_LIMIT: /* R/W 16 */
414         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
415             s->fan_warn_limit[pmdev->page] = pmbus_receive16(pmdev);
416         }
417         break;
418 
419     case MAX31785_MFR_FAN_RUN_TIME: /* R/W 16 */
420         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
421             s->fan_run_time[pmdev->page] = pmbus_receive16(pmdev);
422         }
423         break;
424 
425     case MAX31785_MFR_FAN_PWM_AVG: /* R/W 16 */
426         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
427             s->fan_pwm_avg[pmdev->page] = pmbus_receive16(pmdev);
428         }
429         break;
430 
431     case MAX31785_MFR_FAN_PWM2RPM: /* R/W 64 */
432         if (pmdev->page <= MAX31785_MAX_FAN_PAGE) {
433             s->fan_pwm2rpm[pmdev->page] = pmbus_receive64(pmdev);
434         }
435         break;
436 
437     default:
438         qemu_log_mask(LOG_GUEST_ERROR,
439                       "%s: writing to unsupported register: 0x%02x\n",
440                       __func__, pmdev->code);
441         break;
442     }
443 
444     return 0;
445 }
446 
max31785_exit_reset(Object * obj,ResetType type)447 static void max31785_exit_reset(Object *obj, ResetType type)
448 {
449     PMBusDevice *pmdev = PMBUS_DEVICE(obj);
450     MAX31785State *s = MAX31785(obj);
451 
452     pmdev->capability = MAX31785_DEFAULT_CAPABILITY;
453 
454     for (int i = MAX31785_MIN_FAN_PAGE; i <= MAX31785_MAX_FAN_PAGE; i++) {
455         pmdev->pages[i].vout_mode = MAX31785_DEFAULT_VOUT_MODE;
456         pmdev->pages[i].fan_command_1 = MAX31785_DEFAULT_FAN_COMMAND_1;
457         pmdev->pages[i].revision = MAX31785_DEFAULT_PMBUS_REVISION;
458         pmdev->pages[i].fan_config_1_2 = MAX31785_DEFAULT_FAN_CONFIG_1_2(0);
459         pmdev->pages[i].read_fan_speed_1 = MAX31785_DEFAULT_FAN_SPEED;
460         pmdev->pages[i].status_fans_1_2 = MAX31785_DEFAULT_FAN_STATUS;
461     }
462 
463     for (int i = MAX31785_MIN_TEMP_PAGE; i <= MAX31785_MAX_TEMP_PAGE; i++) {
464         pmdev->pages[i].vout_mode = MAX31785_DEFAULT_VOUT_MODE;
465         pmdev->pages[i].revision = MAX31785_DEFAULT_PMBUS_REVISION;
466         pmdev->pages[i].ot_fault_limit = MAX31785_DEFAULT_OT_FAULT_LIMIT;
467         pmdev->pages[i].ot_warn_limit = MAX31785_DEFAULT_OT_WARN_LIMIT;
468     }
469 
470     for (int i = MAX31785_MIN_ADC_VOLTAGE_PAGE;
471          i <= MAX31785_MAX_ADC_VOLTAGE_PAGE;
472          i++) {
473         pmdev->pages[i].vout_mode = MAX31785_DEFAULT_VOUT_MODE;
474         pmdev->pages[i].revision = MAX31785_DEFAULT_PMBUS_REVISION;
475         pmdev->pages[i].vout_scale_monitor =
476             MAX31785_DEFAULT_VOUT_SCALE_MONITOR;
477         pmdev->pages[i].vout_ov_fault_limit = MAX31785_DEFAULT_OV_FAULT_LIMIT;
478         pmdev->pages[i].vout_ov_warn_limit = MAX31785_DEFAULT_OV_WARN_LIMIT;
479     }
480 
481     s->mfr_location = MAX31785_DEFAULT_TEXT;
482     s->mfr_date = MAX31785_DEFAULT_TEXT;
483     s->mfr_serial = MAX31785_DEFAULT_TEXT;
484 }
485 
486 static const VMStateDescription vmstate_max31785 = {
487     .name = TYPE_MAX31785,
488     .version_id = 0,
489     .minimum_version_id = 0,
490     .fields = (const VMStateField[]){
491         VMSTATE_PMBUS_DEVICE(parent, MAX31785State),
492         VMSTATE_UINT16_ARRAY(mfr_mode, MAX31785State,
493                              MAX31785_TOTAL_NUM_PAGES),
494         VMSTATE_UINT16_ARRAY(vout_peak, MAX31785State,
495                              MAX31785_TOTAL_NUM_PAGES),
496         VMSTATE_UINT16_ARRAY(temperature_peak, MAX31785State,
497                              MAX31785_TOTAL_NUM_PAGES),
498         VMSTATE_UINT16_ARRAY(vout_min, MAX31785State,
499                              MAX31785_TOTAL_NUM_PAGES),
500         VMSTATE_UINT8_ARRAY(fault_response, MAX31785State,
501                             MAX31785_TOTAL_NUM_PAGES),
502         VMSTATE_UINT32_ARRAY(time_count, MAX31785State,
503                              MAX31785_TOTAL_NUM_PAGES),
504         VMSTATE_UINT16_ARRAY(temp_sensor_config, MAX31785State,
505                              MAX31785_TOTAL_NUM_PAGES),
506         VMSTATE_UINT16_ARRAY(fan_config, MAX31785State,
507                              MAX31785_TOTAL_NUM_PAGES),
508         VMSTATE_UINT16_ARRAY(read_fan_pwm, MAX31785State,
509                              MAX31785_TOTAL_NUM_PAGES),
510         VMSTATE_UINT16_ARRAY(fan_fault_limit, MAX31785State,
511                              MAX31785_TOTAL_NUM_PAGES),
512         VMSTATE_UINT16_ARRAY(fan_warn_limit, MAX31785State,
513                              MAX31785_TOTAL_NUM_PAGES),
514         VMSTATE_UINT16_ARRAY(fan_run_time, MAX31785State,
515                              MAX31785_TOTAL_NUM_PAGES),
516         VMSTATE_UINT16_ARRAY(fan_pwm_avg, MAX31785State,
517                              MAX31785_TOTAL_NUM_PAGES),
518         VMSTATE_UINT64_ARRAY(fan_pwm2rpm, MAX31785State,
519                              MAX31785_TOTAL_NUM_PAGES),
520         VMSTATE_UINT64(mfr_location, MAX31785State),
521         VMSTATE_UINT64(mfr_date, MAX31785State),
522         VMSTATE_UINT64(mfr_serial, MAX31785State),
523         VMSTATE_END_OF_LIST()
524     }
525 };
526 
max31785_init(Object * obj)527 static void max31785_init(Object *obj)
528 {
529     PMBusDevice *pmdev = PMBUS_DEVICE(obj);
530 
531     for (int i = MAX31785_MIN_FAN_PAGE; i <= MAX31785_MAX_FAN_PAGE; i++) {
532         pmbus_page_config(pmdev, i, PB_HAS_VOUT_MODE);
533     }
534 
535     for (int i = MAX31785_MIN_TEMP_PAGE; i <= MAX31785_MAX_TEMP_PAGE; i++) {
536         pmbus_page_config(pmdev, i, PB_HAS_VOUT_MODE | PB_HAS_TEMPERATURE);
537     }
538 
539     for (int i = MAX31785_MIN_ADC_VOLTAGE_PAGE;
540         i <= MAX31785_MAX_ADC_VOLTAGE_PAGE;
541         i++) {
542         pmbus_page_config(pmdev, i, PB_HAS_VOUT_MODE | PB_HAS_VOUT |
543                                     PB_HAS_VOUT_RATING);
544     }
545 }
546 
max31785_class_init(ObjectClass * klass,void * data)547 static void max31785_class_init(ObjectClass *klass, void *data)
548 {
549     ResettableClass *rc = RESETTABLE_CLASS(klass);
550     DeviceClass *dc = DEVICE_CLASS(klass);
551     PMBusDeviceClass *k = PMBUS_DEVICE_CLASS(klass);
552     dc->desc = "Maxim MAX31785 6-Channel Fan Controller";
553     dc->vmsd = &vmstate_max31785;
554     k->write_data = max31785_write_data;
555     k->receive_byte = max31785_read_byte;
556     k->device_num_pages = MAX31785_TOTAL_NUM_PAGES;
557     rc->phases.exit = max31785_exit_reset;
558 }
559 
560 static const TypeInfo max31785_info = {
561     .name = TYPE_MAX31785,
562     .parent = TYPE_PMBUS_DEVICE,
563     .instance_size = sizeof(MAX31785State),
564     .instance_init = max31785_init,
565     .class_init = max31785_class_init,
566 };
567 
max31785_register_types(void)568 static void max31785_register_types(void)
569 {
570     type_register_static(&max31785_info);
571 }
572 
573 type_init(max31785_register_types)
574