1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Ampere Computing SoC's SMPro Hardware Monitoring Driver |
4 | * |
5 | * Copyright (c) 2022, Ampere Computing LLC |
6 | */ |
7 | #include <linux/bitfield.h> |
8 | #include <linux/bitops.h> |
9 | #include <linux/hwmon.h> |
10 | #include <linux/hwmon-sysfs.h> |
11 | #include <linux/kernel.h> |
12 | #include <linux/mod_devicetable.h> |
13 | #include <linux/module.h> |
14 | #include <linux/platform_device.h> |
15 | #include <linux/property.h> |
16 | #include <linux/regmap.h> |
17 | |
18 | /* Logical Power Sensor Registers */ |
19 | #define SOC_TEMP 0x10 |
20 | #define SOC_VRD_TEMP 0x11 |
21 | #define DIMM_VRD_TEMP 0x12 |
22 | #define CORE_VRD_TEMP 0x13 |
23 | #define CH0_DIMM_TEMP 0x14 |
24 | #define CH1_DIMM_TEMP 0x15 |
25 | #define CH2_DIMM_TEMP 0x16 |
26 | #define CH3_DIMM_TEMP 0x17 |
27 | #define CH4_DIMM_TEMP 0x18 |
28 | #define CH5_DIMM_TEMP 0x19 |
29 | #define CH6_DIMM_TEMP 0x1A |
30 | #define CH7_DIMM_TEMP 0x1B |
31 | #define RCA_VRD_TEMP 0x1C |
32 | |
33 | #define CORE_VRD_PWR 0x20 |
34 | #define SOC_PWR 0x21 |
35 | #define DIMM_VRD1_PWR 0x22 |
36 | #define DIMM_VRD2_PWR 0x23 |
37 | #define CORE_VRD_PWR_MW 0x26 |
38 | #define SOC_PWR_MW 0x27 |
39 | #define DIMM_VRD1_PWR_MW 0x28 |
40 | #define DIMM_VRD2_PWR_MW 0x29 |
41 | #define RCA_VRD_PWR 0x2A |
42 | #define RCA_VRD_PWR_MW 0x2B |
43 | |
44 | #define MEM_HOT_THRESHOLD 0x32 |
45 | #define SOC_VR_HOT_THRESHOLD 0x33 |
46 | #define CORE_VRD_VOLT 0x34 |
47 | #define SOC_VRD_VOLT 0x35 |
48 | #define DIMM_VRD1_VOLT 0x36 |
49 | #define DIMM_VRD2_VOLT 0x37 |
50 | #define RCA_VRD_VOLT 0x38 |
51 | |
52 | #define CORE_VRD_CURR 0x39 |
53 | #define SOC_VRD_CURR 0x3A |
54 | #define DIMM_VRD1_CURR 0x3B |
55 | #define DIMM_VRD2_CURR 0x3C |
56 | #define RCA_VRD_CURR 0x3D |
57 | |
58 | struct smpro_hwmon { |
59 | struct regmap *regmap; |
60 | }; |
61 | |
62 | struct smpro_sensor { |
63 | const u8 reg; |
64 | const u8 reg_ext; |
65 | const char *label; |
66 | }; |
67 | |
68 | static const struct smpro_sensor temperature[] = { |
69 | { |
70 | .reg = SOC_TEMP, |
71 | .label = "temp1 SoC" |
72 | }, |
73 | { |
74 | .reg = SOC_VRD_TEMP, |
75 | .reg_ext = SOC_VR_HOT_THRESHOLD, |
76 | .label = "temp2 SoC VRD" |
77 | }, |
78 | { |
79 | .reg = DIMM_VRD_TEMP, |
80 | .label = "temp3 DIMM VRD" |
81 | }, |
82 | { |
83 | .reg = CORE_VRD_TEMP, |
84 | .label = "temp4 CORE VRD" |
85 | }, |
86 | { |
87 | .reg = CH0_DIMM_TEMP, |
88 | .reg_ext = MEM_HOT_THRESHOLD, |
89 | .label = "temp5 CH0 DIMM" |
90 | }, |
91 | { |
92 | .reg = CH1_DIMM_TEMP, |
93 | .reg_ext = MEM_HOT_THRESHOLD, |
94 | .label = "temp6 CH1 DIMM" |
95 | }, |
96 | { |
97 | .reg = CH2_DIMM_TEMP, |
98 | .reg_ext = MEM_HOT_THRESHOLD, |
99 | .label = "temp7 CH2 DIMM" |
100 | }, |
101 | { |
102 | .reg = CH3_DIMM_TEMP, |
103 | .reg_ext = MEM_HOT_THRESHOLD, |
104 | .label = "temp8 CH3 DIMM" |
105 | }, |
106 | { |
107 | .reg = CH4_DIMM_TEMP, |
108 | .reg_ext = MEM_HOT_THRESHOLD, |
109 | .label = "temp9 CH4 DIMM" |
110 | }, |
111 | { |
112 | .reg = CH5_DIMM_TEMP, |
113 | .reg_ext = MEM_HOT_THRESHOLD, |
114 | .label = "temp10 CH5 DIMM" |
115 | }, |
116 | { |
117 | .reg = CH6_DIMM_TEMP, |
118 | .reg_ext = MEM_HOT_THRESHOLD, |
119 | .label = "temp11 CH6 DIMM" |
120 | }, |
121 | { |
122 | .reg = CH7_DIMM_TEMP, |
123 | .reg_ext = MEM_HOT_THRESHOLD, |
124 | .label = "temp12 CH7 DIMM" |
125 | }, |
126 | { |
127 | .reg = RCA_VRD_TEMP, |
128 | .label = "temp13 RCA VRD" |
129 | }, |
130 | }; |
131 | |
132 | static const struct smpro_sensor voltage[] = { |
133 | { |
134 | .reg = CORE_VRD_VOLT, |
135 | .label = "vout0 CORE VRD" |
136 | }, |
137 | { |
138 | .reg = SOC_VRD_VOLT, |
139 | .label = "vout1 SoC VRD" |
140 | }, |
141 | { |
142 | .reg = DIMM_VRD1_VOLT, |
143 | .label = "vout2 DIMM VRD1" |
144 | }, |
145 | { |
146 | .reg = DIMM_VRD2_VOLT, |
147 | .label = "vout3 DIMM VRD2" |
148 | }, |
149 | { |
150 | .reg = RCA_VRD_VOLT, |
151 | .label = "vout4 RCA VRD" |
152 | }, |
153 | }; |
154 | |
155 | static const struct smpro_sensor curr_sensor[] = { |
156 | { |
157 | .reg = CORE_VRD_CURR, |
158 | .label = "iout1 CORE VRD" |
159 | }, |
160 | { |
161 | .reg = SOC_VRD_CURR, |
162 | .label = "iout2 SoC VRD" |
163 | }, |
164 | { |
165 | .reg = DIMM_VRD1_CURR, |
166 | .label = "iout3 DIMM VRD1" |
167 | }, |
168 | { |
169 | .reg = DIMM_VRD2_CURR, |
170 | .label = "iout4 DIMM VRD2" |
171 | }, |
172 | { |
173 | .reg = RCA_VRD_CURR, |
174 | .label = "iout5 RCA VRD" |
175 | }, |
176 | }; |
177 | |
178 | static const struct smpro_sensor power[] = { |
179 | { |
180 | .reg = CORE_VRD_PWR, |
181 | .reg_ext = CORE_VRD_PWR_MW, |
182 | .label = "power1 CORE VRD" |
183 | }, |
184 | { |
185 | .reg = SOC_PWR, |
186 | .reg_ext = SOC_PWR_MW, |
187 | .label = "power2 SoC" |
188 | }, |
189 | { |
190 | .reg = DIMM_VRD1_PWR, |
191 | .reg_ext = DIMM_VRD1_PWR_MW, |
192 | .label = "power3 DIMM VRD1" |
193 | }, |
194 | { |
195 | .reg = DIMM_VRD2_PWR, |
196 | .reg_ext = DIMM_VRD2_PWR_MW, |
197 | .label = "power4 DIMM VRD2" |
198 | }, |
199 | { |
200 | .reg = RCA_VRD_PWR, |
201 | .reg_ext = RCA_VRD_PWR_MW, |
202 | .label = "power5 RCA VRD" |
203 | }, |
204 | }; |
205 | |
206 | static int smpro_read_temp(struct device *dev, u32 attr, int channel, long *val) |
207 | { |
208 | struct smpro_hwmon *hwmon = dev_get_drvdata(dev); |
209 | unsigned int value; |
210 | int ret; |
211 | |
212 | switch (attr) { |
213 | case hwmon_temp_input: |
214 | ret = regmap_read(map: hwmon->regmap, reg: temperature[channel].reg, val: &value); |
215 | if (ret) |
216 | return ret; |
217 | break; |
218 | case hwmon_temp_crit: |
219 | ret = regmap_read(map: hwmon->regmap, reg: temperature[channel].reg_ext, val: &value); |
220 | if (ret) |
221 | return ret; |
222 | break; |
223 | default: |
224 | return -EOPNOTSUPP; |
225 | } |
226 | |
227 | *val = sign_extend32(value, index: 8) * 1000; |
228 | return 0; |
229 | } |
230 | |
231 | static int smpro_read_in(struct device *dev, u32 attr, int channel, long *val) |
232 | { |
233 | struct smpro_hwmon *hwmon = dev_get_drvdata(dev); |
234 | unsigned int value; |
235 | int ret; |
236 | |
237 | switch (attr) { |
238 | case hwmon_in_input: |
239 | ret = regmap_read(map: hwmon->regmap, reg: voltage[channel].reg, val: &value); |
240 | if (ret < 0) |
241 | return ret; |
242 | /* 15-bit value in 1mV */ |
243 | *val = value & 0x7fff; |
244 | return 0; |
245 | default: |
246 | return -EOPNOTSUPP; |
247 | } |
248 | } |
249 | |
250 | static int smpro_read_curr(struct device *dev, u32 attr, int channel, long *val) |
251 | { |
252 | struct smpro_hwmon *hwmon = dev_get_drvdata(dev); |
253 | unsigned int value; |
254 | int ret; |
255 | |
256 | switch (attr) { |
257 | case hwmon_curr_input: |
258 | ret = regmap_read(map: hwmon->regmap, reg: curr_sensor[channel].reg, val: &value); |
259 | if (ret < 0) |
260 | return ret; |
261 | /* Scale reported by the hardware is 1mA */ |
262 | *val = value & 0x7fff; |
263 | return 0; |
264 | default: |
265 | return -EOPNOTSUPP; |
266 | } |
267 | } |
268 | |
269 | static int smpro_read_power(struct device *dev, u32 attr, int channel, long *val_pwr) |
270 | { |
271 | struct smpro_hwmon *hwmon = dev_get_drvdata(dev); |
272 | unsigned int val = 0, val_mw = 0; |
273 | int ret; |
274 | |
275 | switch (attr) { |
276 | case hwmon_power_input: |
277 | ret = regmap_read(map: hwmon->regmap, reg: power[channel].reg, val: &val); |
278 | if (ret) |
279 | return ret; |
280 | |
281 | ret = regmap_read(map: hwmon->regmap, reg: power[channel].reg_ext, val: &val_mw); |
282 | if (ret) |
283 | return ret; |
284 | /* 10-bit value */ |
285 | *val_pwr = (val & 0x3ff) * 1000000 + (val_mw & 0x3ff) * 1000; |
286 | return 0; |
287 | |
288 | default: |
289 | return -EOPNOTSUPP; |
290 | } |
291 | } |
292 | |
293 | static int smpro_read(struct device *dev, enum hwmon_sensor_types type, |
294 | u32 attr, int channel, long *val) |
295 | { |
296 | switch (type) { |
297 | case hwmon_temp: |
298 | return smpro_read_temp(dev, attr, channel, val); |
299 | case hwmon_in: |
300 | return smpro_read_in(dev, attr, channel, val); |
301 | case hwmon_power: |
302 | return smpro_read_power(dev, attr, channel, val_pwr: val); |
303 | case hwmon_curr: |
304 | return smpro_read_curr(dev, attr, channel, val); |
305 | default: |
306 | return -EOPNOTSUPP; |
307 | } |
308 | } |
309 | |
310 | static int smpro_read_string(struct device *dev, enum hwmon_sensor_types type, |
311 | u32 attr, int channel, const char **str) |
312 | { |
313 | switch (type) { |
314 | case hwmon_temp: |
315 | switch (attr) { |
316 | case hwmon_temp_label: |
317 | *str = temperature[channel].label; |
318 | return 0; |
319 | default: |
320 | break; |
321 | } |
322 | break; |
323 | |
324 | case hwmon_in: |
325 | switch (attr) { |
326 | case hwmon_in_label: |
327 | *str = voltage[channel].label; |
328 | return 0; |
329 | default: |
330 | break; |
331 | } |
332 | break; |
333 | |
334 | case hwmon_curr: |
335 | switch (attr) { |
336 | case hwmon_curr_label: |
337 | *str = curr_sensor[channel].label; |
338 | return 0; |
339 | default: |
340 | break; |
341 | } |
342 | break; |
343 | |
344 | case hwmon_power: |
345 | switch (attr) { |
346 | case hwmon_power_label: |
347 | *str = power[channel].label; |
348 | return 0; |
349 | default: |
350 | break; |
351 | } |
352 | break; |
353 | default: |
354 | break; |
355 | } |
356 | |
357 | return -EOPNOTSUPP; |
358 | } |
359 | |
360 | static umode_t smpro_is_visible(const void *data, enum hwmon_sensor_types type, |
361 | u32 attr, int channel) |
362 | { |
363 | const struct smpro_hwmon *hwmon = data; |
364 | unsigned int value; |
365 | int ret; |
366 | |
367 | switch (type) { |
368 | case hwmon_temp: |
369 | switch (attr) { |
370 | case hwmon_temp_input: |
371 | case hwmon_temp_label: |
372 | case hwmon_temp_crit: |
373 | ret = regmap_read(map: hwmon->regmap, reg: temperature[channel].reg, val: &value); |
374 | if (ret || value == 0xFFFF) |
375 | return 0; |
376 | break; |
377 | default: |
378 | break; |
379 | } |
380 | break; |
381 | default: |
382 | break; |
383 | } |
384 | |
385 | return 0444; |
386 | } |
387 | |
388 | static const struct hwmon_channel_info * const smpro_info[] = { |
389 | HWMON_CHANNEL_INFO(temp, |
390 | HWMON_T_INPUT | HWMON_T_LABEL, |
391 | HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, |
392 | HWMON_T_INPUT | HWMON_T_LABEL, |
393 | HWMON_T_INPUT | HWMON_T_LABEL, |
394 | HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, |
395 | HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, |
396 | HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, |
397 | HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, |
398 | HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, |
399 | HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, |
400 | HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, |
401 | HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, |
402 | HWMON_T_INPUT | HWMON_T_LABEL), |
403 | HWMON_CHANNEL_INFO(in, |
404 | HWMON_I_INPUT | HWMON_I_LABEL, |
405 | HWMON_I_INPUT | HWMON_I_LABEL, |
406 | HWMON_I_INPUT | HWMON_I_LABEL, |
407 | HWMON_I_INPUT | HWMON_I_LABEL, |
408 | HWMON_I_INPUT | HWMON_I_LABEL), |
409 | HWMON_CHANNEL_INFO(power, |
410 | HWMON_P_INPUT | HWMON_P_LABEL, |
411 | HWMON_P_INPUT | HWMON_P_LABEL, |
412 | HWMON_P_INPUT | HWMON_P_LABEL, |
413 | HWMON_P_INPUT | HWMON_P_LABEL, |
414 | HWMON_P_INPUT | HWMON_P_LABEL), |
415 | HWMON_CHANNEL_INFO(curr, |
416 | HWMON_C_INPUT | HWMON_C_LABEL, |
417 | HWMON_C_INPUT | HWMON_C_LABEL, |
418 | HWMON_C_INPUT | HWMON_C_LABEL, |
419 | HWMON_C_INPUT | HWMON_C_LABEL, |
420 | HWMON_C_INPUT | HWMON_C_LABEL), |
421 | NULL |
422 | }; |
423 | |
424 | static const struct hwmon_ops smpro_hwmon_ops = { |
425 | .is_visible = smpro_is_visible, |
426 | .read = smpro_read, |
427 | .read_string = smpro_read_string, |
428 | }; |
429 | |
430 | static const struct hwmon_chip_info smpro_chip_info = { |
431 | .ops = &smpro_hwmon_ops, |
432 | .info = smpro_info, |
433 | }; |
434 | |
435 | static int smpro_hwmon_probe(struct platform_device *pdev) |
436 | { |
437 | struct smpro_hwmon *hwmon; |
438 | struct device *hwmon_dev; |
439 | |
440 | hwmon = devm_kzalloc(dev: &pdev->dev, size: sizeof(struct smpro_hwmon), GFP_KERNEL); |
441 | if (!hwmon) |
442 | return -ENOMEM; |
443 | |
444 | hwmon->regmap = dev_get_regmap(dev: pdev->dev.parent, NULL); |
445 | if (!hwmon->regmap) |
446 | return -ENODEV; |
447 | |
448 | hwmon_dev = devm_hwmon_device_register_with_info(dev: &pdev->dev, name: "smpro_hwmon" , |
449 | drvdata: hwmon, info: &smpro_chip_info, NULL); |
450 | |
451 | return PTR_ERR_OR_ZERO(ptr: hwmon_dev); |
452 | } |
453 | |
454 | static struct platform_driver smpro_hwmon_driver = { |
455 | .probe = smpro_hwmon_probe, |
456 | .driver = { |
457 | .name = "smpro-hwmon" , |
458 | }, |
459 | }; |
460 | |
461 | module_platform_driver(smpro_hwmon_driver); |
462 | |
463 | MODULE_AUTHOR("Thu Nguyen <thu@os.amperecomputing.com>" ); |
464 | MODULE_AUTHOR("Quan Nguyen <quan@os.amperecomputing.com>" ); |
465 | MODULE_DESCRIPTION("Ampere Altra SMPro hwmon driver" ); |
466 | MODULE_LICENSE("GPL" ); |
467 | |