1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Intel MAX 10 BMC HWMON Driver
4  *
5  * Copyright (C) 2018-2020 Intel Corporation. All rights reserved.
6  *
7  */
8 #include <linux/device.h>
9 #include <linux/hwmon.h>
10 #include <linux/mfd/intel-m10-bmc.h>
11 #include <linux/module.h>
12 #include <linux/mod_devicetable.h>
13 #include <linux/platform_device.h>
14 
15 struct m10bmc_sdata {
16 	unsigned int reg_input;
17 	unsigned int reg_max;
18 	unsigned int reg_crit;
19 	unsigned int reg_hyst;
20 	unsigned int reg_min;
21 	unsigned int multiplier;
22 	const char *label;
23 };
24 
25 struct m10bmc_hwmon_board_data {
26 	const struct m10bmc_sdata *tables[hwmon_max];
27 	const struct hwmon_channel_info **hinfo;
28 };
29 
30 struct m10bmc_hwmon {
31 	struct device *dev;
32 	struct hwmon_chip_info chip;
33 	char *hw_name;
34 	struct intel_m10bmc *m10bmc;
35 	const struct m10bmc_hwmon_board_data *bdata;
36 };
37 
38 static const struct m10bmc_sdata n3000bmc_temp_tbl[] = {
39 	{ 0x100, 0x104, 0x108, 0x10c, 0x0, 500, "Board Temperature" },
40 	{ 0x110, 0x114, 0x118, 0x0, 0x0, 500, "FPGA Die Temperature" },
41 	{ 0x11c, 0x124, 0x120, 0x0, 0x0, 500, "QSFP0 Temperature" },
42 	{ 0x12c, 0x134, 0x130, 0x0, 0x0, 500, "QSFP1 Temperature" },
43 	{ 0x168, 0x0, 0x0, 0x0, 0x0, 500, "Retimer A Temperature" },
44 	{ 0x16c, 0x0, 0x0, 0x0, 0x0, 500, "Retimer A SerDes Temperature" },
45 	{ 0x170, 0x0, 0x0, 0x0, 0x0, 500, "Retimer B Temperature" },
46 	{ 0x174, 0x0, 0x0, 0x0, 0x0, 500, "Retimer B SerDes Temperature" },
47 };
48 
49 static const struct m10bmc_sdata n3000bmc_in_tbl[] = {
50 	{ 0x128, 0x0, 0x0, 0x0, 0x0, 1, "QSFP0 Supply Voltage" },
51 	{ 0x138, 0x0, 0x0, 0x0, 0x0, 1, "QSFP1 Supply Voltage" },
52 	{ 0x13c, 0x0, 0x0, 0x0, 0x0, 1, "FPGA Core Voltage" },
53 	{ 0x144, 0x0, 0x0, 0x0, 0x0, 1, "12V Backplane Voltage" },
54 	{ 0x14c, 0x0, 0x0, 0x0, 0x0, 1, "1.2V Voltage" },
55 	{ 0x150, 0x0, 0x0, 0x0, 0x0, 1, "12V AUX Voltage" },
56 	{ 0x158, 0x0, 0x0, 0x0, 0x0, 1, "1.8V Voltage" },
57 	{ 0x15c, 0x0, 0x0, 0x0, 0x0, 1, "3.3V Voltage" },
58 };
59 
60 static const struct m10bmc_sdata n3000bmc_curr_tbl[] = {
61 	{ 0x140, 0x0, 0x0, 0x0, 0x0, 1, "FPGA Core Current" },
62 	{ 0x148, 0x0, 0x0, 0x0, 0x0, 1, "12V Backplane Current" },
63 	{ 0x154, 0x0, 0x0, 0x0, 0x0, 1, "12V AUX Current" },
64 };
65 
66 static const struct m10bmc_sdata n3000bmc_power_tbl[] = {
67 	{ 0x160, 0x0, 0x0, 0x0, 0x0, 1000, "Board Power" },
68 };
69 
70 static const struct hwmon_channel_info *n3000bmc_hinfo[] = {
71 	HWMON_CHANNEL_INFO(temp,
72 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
73 			   HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL,
74 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
75 			   HWMON_T_LABEL,
76 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
77 			   HWMON_T_LABEL,
78 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
79 			   HWMON_T_LABEL,
80 			   HWMON_T_INPUT | HWMON_T_LABEL,
81 			   HWMON_T_INPUT | HWMON_T_LABEL,
82 			   HWMON_T_INPUT | HWMON_T_LABEL,
83 			   HWMON_T_INPUT | HWMON_T_LABEL),
84 	HWMON_CHANNEL_INFO(in,
85 			   HWMON_I_INPUT | HWMON_I_LABEL,
86 			   HWMON_I_INPUT | HWMON_I_LABEL,
87 			   HWMON_I_INPUT | HWMON_I_LABEL,
88 			   HWMON_I_INPUT | HWMON_I_LABEL,
89 			   HWMON_I_INPUT | HWMON_I_LABEL,
90 			   HWMON_I_INPUT | HWMON_I_LABEL,
91 			   HWMON_I_INPUT | HWMON_I_LABEL,
92 			   HWMON_I_INPUT | HWMON_I_LABEL),
93 	HWMON_CHANNEL_INFO(curr,
94 			   HWMON_C_INPUT | HWMON_C_LABEL,
95 			   HWMON_C_INPUT | HWMON_C_LABEL,
96 			   HWMON_C_INPUT | HWMON_C_LABEL),
97 	HWMON_CHANNEL_INFO(power,
98 			   HWMON_P_INPUT | HWMON_P_LABEL),
99 	NULL
100 };
101 
102 static const struct m10bmc_sdata d5005bmc_temp_tbl[] = {
103 	{ 0x100, 0x104, 0x108, 0x10c, 0x0, 500, "Board Inlet Air Temperature" },
104 	{ 0x110, 0x114, 0x118, 0x0, 0x0, 500, "FPGA Core Temperature" },
105 	{ 0x11c, 0x120, 0x124, 0x128, 0x0, 500, "Board Exhaust Air Temperature" },
106 	{ 0x12c, 0x130, 0x134, 0x0, 0x0, 500, "FPGA Transceiver Temperature" },
107 	{ 0x138, 0x13c, 0x140, 0x144, 0x0, 500, "RDIMM0 Temperature" },
108 	{ 0x148, 0x14c, 0x150, 0x154, 0x0, 500, "RDIMM1 Temperature" },
109 	{ 0x158, 0x15c, 0x160, 0x164, 0x0, 500, "RDIMM2 Temperature" },
110 	{ 0x168, 0x16c, 0x170, 0x174, 0x0, 500, "RDIMM3 Temperature" },
111 	{ 0x178, 0x17c, 0x180, 0x0, 0x0, 500, "QSFP0 Temperature" },
112 	{ 0x188, 0x18c, 0x190, 0x0, 0x0, 500, "QSFP1 Temperature" },
113 	{ 0x1a0, 0x1a4, 0x1a8, 0x0, 0x0, 500, "3.3v Temperature" },
114 	{ 0x1bc, 0x1c0, 0x1c4, 0x0, 0x0, 500, "VCCERAM Temperature" },
115 	{ 0x1d8, 0x1dc, 0x1e0, 0x0, 0x0, 500, "VCCR Temperature" },
116 	{ 0x1f4, 0x1f8, 0x1fc, 0x0, 0x0, 500, "VCCT Temperature" },
117 	{ 0x210, 0x214, 0x218, 0x0, 0x0, 500, "1.8v Temperature" },
118 	{ 0x22c, 0x230, 0x234, 0x0, 0x0, 500, "12v Backplane Temperature" },
119 	{ 0x248, 0x24c, 0x250, 0x0, 0x0, 500, "12v AUX Temperature" },
120 };
121 
122 static const struct m10bmc_sdata d5005bmc_in_tbl[] = {
123 	{ 0x184, 0x0, 0x0, 0x0, 0x0, 1, "QSFP0 Supply Voltage" },
124 	{ 0x194, 0x0, 0x0, 0x0, 0x0, 1, "QSFP1 Supply Voltage" },
125 	{ 0x198, 0x0, 0x0, 0x0, 0x0, 1, "FPGA Core Voltage" },
126 	{ 0x1ac, 0x1b0, 0x1b4, 0x0, 0x0, 1, "3.3v Voltage" },
127 	{ 0x1c8, 0x1cc, 0x1d0, 0x0, 0x0, 1, "VCCERAM Voltage" },
128 	{ 0x1e4, 0x1e8, 0x1ec, 0x0, 0x0, 1, "VCCR Voltage" },
129 	{ 0x200, 0x204, 0x208, 0x0, 0x0, 1, "VCCT Voltage" },
130 	{ 0x21c, 0x220, 0x224, 0x0, 0x0, 1, "1.8v Voltage" },
131 	{ 0x238, 0x0, 0x0, 0x0, 0x23c, 1, "12v Backplane Voltage" },
132 	{ 0x254, 0x0, 0x0, 0x0, 0x258, 1, "12v AUX Voltage" },
133 };
134 
135 static const struct m10bmc_sdata d5005bmc_curr_tbl[] = {
136 	{ 0x19c, 0x0, 0x0, 0x0, 0x0, 1, "FPGA Core Current" },
137 	{ 0x1b8, 0x0, 0x0, 0x0, 0x0, 1, "3.3v Current" },
138 	{ 0x1d4, 0x0, 0x0, 0x0, 0x0, 1, "VCCERAM Current" },
139 	{ 0x1f0, 0x0, 0x0, 0x0, 0x0, 1, "VCCR Current" },
140 	{ 0x20c, 0x0, 0x0, 0x0, 0x0, 1, "VCCT Current" },
141 	{ 0x228, 0x0, 0x0, 0x0, 0x0, 1, "1.8v Current" },
142 	{ 0x240, 0x244, 0x0, 0x0, 0x0, 1, "12v Backplane Current" },
143 	{ 0x25c, 0x260, 0x0, 0x0, 0x0, 1, "12v AUX Current" },
144 };
145 
146 static const struct m10bmc_hwmon_board_data n3000bmc_hwmon_bdata = {
147 	.tables = {
148 		[hwmon_temp] = n3000bmc_temp_tbl,
149 		[hwmon_in] = n3000bmc_in_tbl,
150 		[hwmon_curr] = n3000bmc_curr_tbl,
151 		[hwmon_power] = n3000bmc_power_tbl,
152 	},
153 
154 	.hinfo = n3000bmc_hinfo,
155 };
156 
157 static const struct hwmon_channel_info *d5005bmc_hinfo[] = {
158 	HWMON_CHANNEL_INFO(temp,
159 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
160 			   HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL,
161 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
162 			   HWMON_T_LABEL,
163 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
164 			   HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL,
165 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
166 			   HWMON_T_LABEL,
167 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
168 			   HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL,
169 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
170 			   HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL,
171 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
172 			   HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL,
173 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
174 			   HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL,
175 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
176 			   HWMON_T_LABEL,
177 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
178 			   HWMON_T_LABEL,
179 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
180 			   HWMON_T_LABEL,
181 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
182 			   HWMON_T_LABEL,
183 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
184 			   HWMON_T_LABEL,
185 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
186 			   HWMON_T_LABEL,
187 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
188 			   HWMON_T_LABEL,
189 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
190 			   HWMON_T_LABEL,
191 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
192 			   HWMON_T_LABEL),
193 	HWMON_CHANNEL_INFO(in,
194 			   HWMON_I_INPUT | HWMON_I_LABEL,
195 			   HWMON_I_INPUT | HWMON_I_LABEL,
196 			   HWMON_I_INPUT | HWMON_I_LABEL,
197 			   HWMON_I_INPUT | HWMON_I_MAX | HWMON_I_CRIT |
198 			   HWMON_I_LABEL,
199 			   HWMON_I_INPUT | HWMON_I_MAX | HWMON_I_CRIT |
200 			   HWMON_I_LABEL,
201 			   HWMON_I_INPUT | HWMON_I_MAX | HWMON_I_CRIT |
202 			   HWMON_I_LABEL,
203 			   HWMON_I_INPUT | HWMON_I_MAX | HWMON_I_CRIT |
204 			   HWMON_I_LABEL,
205 			   HWMON_I_INPUT | HWMON_I_MAX | HWMON_I_CRIT |
206 			   HWMON_I_LABEL,
207 			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_LABEL,
208 			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_LABEL),
209 	HWMON_CHANNEL_INFO(curr,
210 			   HWMON_C_INPUT | HWMON_C_LABEL,
211 			   HWMON_C_INPUT | HWMON_C_LABEL,
212 			   HWMON_C_INPUT | HWMON_C_LABEL,
213 			   HWMON_C_INPUT | HWMON_C_LABEL,
214 			   HWMON_C_INPUT | HWMON_C_LABEL,
215 			   HWMON_C_INPUT | HWMON_C_LABEL,
216 			   HWMON_C_INPUT | HWMON_C_MAX | HWMON_C_LABEL,
217 			   HWMON_C_INPUT | HWMON_C_MAX | HWMON_C_LABEL),
218 	NULL
219 };
220 
221 static const struct m10bmc_hwmon_board_data d5005bmc_hwmon_bdata = {
222 	.tables = {
223 		[hwmon_temp] = d5005bmc_temp_tbl,
224 		[hwmon_in] = d5005bmc_in_tbl,
225 		[hwmon_curr] = d5005bmc_curr_tbl,
226 	},
227 
228 	.hinfo = d5005bmc_hinfo,
229 };
230 
231 static const struct m10bmc_sdata n5010bmc_temp_tbl[] = {
232 	{ 0x100, 0x0, 0x104, 0x0, 0x0, 1000, "Board Local Temperature" },
233 	{ 0x108, 0x0, 0x10c, 0x0, 0x0, 1000, "FPGA 1 Temperature" },
234 	{ 0x110, 0x0, 0x114, 0x0, 0x0, 1000, "FPGA 2 Temperature" },
235 	{ 0x118, 0x0, 0x0, 0x0, 0x0, 1000, "Card Top Temperature" },
236 	{ 0x11c, 0x0, 0x0, 0x0, 0x0, 1000, "Card Bottom Temperature" },
237 	{ 0x128, 0x0, 0x0, 0x0, 0x0, 1000, "FPGA 1.2V Temperature" },
238 	{ 0x134, 0x0, 0x0, 0x0, 0x0, 1000, "FPGA 5V Temperature" },
239 	{ 0x140, 0x0, 0x0, 0x0, 0x0, 1000, "FPGA 0.9V Temperature" },
240 	{ 0x14c, 0x0, 0x0, 0x0, 0x0, 1000, "FPGA 0.85V Temperature" },
241 	{ 0x158, 0x0, 0x0, 0x0, 0x0, 1000, "AUX 12V Temperature" },
242 	{ 0x164, 0x0, 0x0, 0x0, 0x0, 1000, "Backplane 12V Temperature" },
243 	{ 0x1a8, 0x0, 0x0, 0x0, 0x0, 1000, "QSFP28-1 Temperature" },
244 	{ 0x1ac, 0x0, 0x0, 0x0, 0x0, 1000, "QSFP28-2 Temperature" },
245 	{ 0x1b0, 0x0, 0x0, 0x0, 0x0, 1000, "QSFP28-3 Temperature" },
246 	{ 0x1b4, 0x0, 0x0, 0x0, 0x0, 1000, "QSFP28-4 Temperature" },
247 	{ 0x1b8, 0x0, 0x0, 0x0, 0x0, 1000, "CVL1 Internal Temperature" },
248 	{ 0x1bc, 0x0, 0x0, 0x0, 0x0, 1000, "CVL2 Internal Temperature" },
249 };
250 
251 static const struct m10bmc_sdata n5010bmc_in_tbl[] = {
252 	{ 0x120, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 1.2V Voltage" },
253 	{ 0x12c, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 5V Voltage" },
254 	{ 0x138, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 0.9V Voltage" },
255 	{ 0x144, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 0.85V Voltage" },
256 	{ 0x150, 0x0, 0x0, 0x0, 0x0, 1, "AUX 12V Voltage" },
257 	{ 0x15c, 0x0, 0x0, 0x0, 0x0, 1, "Backplane 12V Voltage" },
258 	{ 0x16c, 0x0, 0x0, 0x0, 0x0, 1, "DDR4 1.2V Voltage" },
259 	{ 0x17c, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 1.8V Voltage" },
260 	{ 0x184, 0x0, 0x0, 0x0, 0x0, 1, "QDR 1.3V Voltage" },
261 	{ 0x18c, 0x0, 0x0, 0x0, 0x0, 1, "CVL1 0.8V Voltage" },
262 	{ 0x194, 0x0, 0x0, 0x0, 0x0, 1, "CVL1 1.05V Voltage" },
263 	{ 0x19c, 0x0, 0x0, 0x0, 0x0, 1, "CVL2 1.05V Voltage" },
264 	{ 0x1a4, 0x0, 0x0, 0x0, 0x0, 1, "CVL2 0.8V Voltage" },
265 };
266 
267 static const struct m10bmc_sdata n5010bmc_curr_tbl[] = {
268 	{ 0x124, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 1.2V Current" },
269 	{ 0x130, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 5V Current" },
270 	{ 0x13c, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 0.9V Current" },
271 	{ 0x148, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 0.85V Current" },
272 	{ 0x154, 0x0, 0x0, 0x0, 0x0, 1, "AUX 12V Current" },
273 	{ 0x160, 0x0, 0x0, 0x0, 0x0, 1, "Backplane 12V Current" },
274 	{ 0x168, 0x0, 0x0, 0x0, 0x0, 1, "DDR4 1.2V Current" },
275 	{ 0x178, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 1.8V Current" },
276 	{ 0x180, 0x0, 0x0, 0x0, 0x0, 1, "QDR 1.3V Current" },
277 	{ 0x188, 0x0, 0x0, 0x0, 0x0, 1, "CVL1 0.8V Current" },
278 	{ 0x190, 0x0, 0x0, 0x0, 0x0, 1, "CVL1 1.05V Current" },
279 	{ 0x198, 0x0, 0x0, 0x0, 0x0, 1, "CVL2 1.05V Current" },
280 	{ 0x1a0, 0x0, 0x0, 0x0, 0x0, 1, "CVL2 0.8V Current" },
281 };
282 
283 static const struct hwmon_channel_info *n5010bmc_hinfo[] = {
284 	HWMON_CHANNEL_INFO(temp,
285 			   HWMON_T_INPUT | HWMON_T_CRIT | HWMON_T_LABEL,
286 			   HWMON_T_INPUT | HWMON_T_CRIT | HWMON_T_LABEL,
287 			   HWMON_T_INPUT | HWMON_T_CRIT | HWMON_T_LABEL,
288 			   HWMON_T_INPUT | HWMON_T_LABEL,
289 			   HWMON_T_INPUT | HWMON_T_LABEL,
290 			   HWMON_T_INPUT | HWMON_T_LABEL,
291 			   HWMON_T_INPUT | HWMON_T_LABEL,
292 			   HWMON_T_INPUT | HWMON_T_LABEL,
293 			   HWMON_T_INPUT | HWMON_T_LABEL,
294 			   HWMON_T_INPUT | HWMON_T_LABEL,
295 			   HWMON_T_INPUT | HWMON_T_LABEL,
296 			   HWMON_T_INPUT | HWMON_T_LABEL,
297 			   HWMON_T_INPUT | HWMON_T_LABEL,
298 			   HWMON_T_INPUT | HWMON_T_LABEL,
299 			   HWMON_T_INPUT | HWMON_T_LABEL,
300 			   HWMON_T_INPUT | HWMON_T_LABEL,
301 			   HWMON_T_INPUT | HWMON_T_LABEL),
302 	HWMON_CHANNEL_INFO(in,
303 			   HWMON_I_INPUT | HWMON_I_LABEL,
304 			   HWMON_I_INPUT | HWMON_I_LABEL,
305 			   HWMON_I_INPUT | HWMON_I_LABEL,
306 			   HWMON_I_INPUT | HWMON_I_LABEL,
307 			   HWMON_I_INPUT | HWMON_I_LABEL,
308 			   HWMON_I_INPUT | HWMON_I_LABEL,
309 			   HWMON_I_INPUT | HWMON_I_LABEL,
310 			   HWMON_I_INPUT | HWMON_I_LABEL,
311 			   HWMON_I_INPUT | HWMON_I_LABEL,
312 			   HWMON_I_INPUT | HWMON_I_LABEL,
313 			   HWMON_I_INPUT | HWMON_I_LABEL,
314 			   HWMON_I_INPUT | HWMON_I_LABEL,
315 			   HWMON_I_INPUT | HWMON_I_LABEL),
316 	HWMON_CHANNEL_INFO(curr,
317 			   HWMON_C_INPUT | HWMON_C_LABEL,
318 			   HWMON_C_INPUT | HWMON_C_LABEL,
319 			   HWMON_C_INPUT | HWMON_C_LABEL,
320 			   HWMON_C_INPUT | HWMON_C_LABEL,
321 			   HWMON_C_INPUT | HWMON_C_LABEL,
322 			   HWMON_C_INPUT | HWMON_C_LABEL,
323 			   HWMON_C_INPUT | HWMON_C_LABEL,
324 			   HWMON_C_INPUT | HWMON_C_LABEL,
325 			   HWMON_C_INPUT | HWMON_C_LABEL,
326 			   HWMON_C_INPUT | HWMON_C_LABEL,
327 			   HWMON_C_INPUT | HWMON_C_LABEL,
328 			   HWMON_C_INPUT | HWMON_C_LABEL,
329 			   HWMON_C_INPUT | HWMON_C_LABEL),
330 	NULL
331 };
332 
333 static const struct m10bmc_hwmon_board_data n5010bmc_hwmon_bdata = {
334 	.tables = {
335 		[hwmon_temp] = n5010bmc_temp_tbl,
336 		[hwmon_in] = n5010bmc_in_tbl,
337 		[hwmon_curr] = n5010bmc_curr_tbl,
338 	},
339 
340 	.hinfo = n5010bmc_hinfo,
341 };
342 
343 static umode_t
m10bmc_hwmon_is_visible(const void * data,enum hwmon_sensor_types type,u32 attr,int channel)344 m10bmc_hwmon_is_visible(const void *data, enum hwmon_sensor_types type,
345 			u32 attr, int channel)
346 {
347 	return 0444;
348 }
349 
350 static const struct m10bmc_sdata *
find_sensor_data(struct m10bmc_hwmon * hw,enum hwmon_sensor_types type,int channel)351 find_sensor_data(struct m10bmc_hwmon *hw, enum hwmon_sensor_types type,
352 		 int channel)
353 {
354 	const struct m10bmc_sdata *tbl;
355 
356 	tbl = hw->bdata->tables[type];
357 	if (!tbl)
358 		return ERR_PTR(-EOPNOTSUPP);
359 
360 	return &tbl[channel];
361 }
362 
do_sensor_read(struct m10bmc_hwmon * hw,const struct m10bmc_sdata * data,unsigned int regoff,long * val)363 static int do_sensor_read(struct m10bmc_hwmon *hw,
364 			  const struct m10bmc_sdata *data,
365 			  unsigned int regoff, long *val)
366 {
367 	unsigned int regval;
368 	int ret;
369 
370 	ret = m10bmc_sys_read(hw->m10bmc, regoff, &regval);
371 	if (ret)
372 		return ret;
373 
374 	/*
375 	 * BMC Firmware will return 0xdeadbeef if the sensor value is invalid
376 	 * at that time. This usually happens on sensor channels which connect
377 	 * to external pluggable modules, e.g. QSFP temperature and voltage.
378 	 * When the QSFP is unplugged from cage, driver will get 0xdeadbeef
379 	 * from their registers.
380 	 */
381 	if (regval == 0xdeadbeef)
382 		return -ENODATA;
383 
384 	*val = regval * data->multiplier;
385 
386 	return 0;
387 }
388 
m10bmc_hwmon_read(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long * val)389 static int m10bmc_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
390 			     u32 attr, int channel, long *val)
391 {
392 	struct m10bmc_hwmon *hw = dev_get_drvdata(dev);
393 	unsigned int reg = 0, reg_hyst = 0;
394 	const struct m10bmc_sdata *data;
395 	long hyst, value;
396 	int ret;
397 
398 	data = find_sensor_data(hw, type, channel);
399 	if (IS_ERR(data))
400 		return PTR_ERR(data);
401 
402 	switch (type) {
403 	case hwmon_temp:
404 		switch (attr) {
405 		case hwmon_temp_input:
406 			reg = data->reg_input;
407 			break;
408 		case hwmon_temp_max_hyst:
409 			reg_hyst = data->reg_hyst;
410 			fallthrough;
411 		case hwmon_temp_max:
412 			reg = data->reg_max;
413 			break;
414 		case hwmon_temp_crit_hyst:
415 			reg_hyst = data->reg_hyst;
416 			fallthrough;
417 		case hwmon_temp_crit:
418 			reg = data->reg_crit;
419 			break;
420 		default:
421 			return -EOPNOTSUPP;
422 		}
423 		break;
424 	case hwmon_in:
425 		switch (attr) {
426 		case hwmon_in_input:
427 			reg = data->reg_input;
428 			break;
429 		case hwmon_in_max:
430 			reg = data->reg_max;
431 			break;
432 		case hwmon_in_crit:
433 			reg = data->reg_crit;
434 			break;
435 		case hwmon_in_min:
436 			reg = data->reg_min;
437 			break;
438 		default:
439 			return -EOPNOTSUPP;
440 		}
441 		break;
442 	case hwmon_curr:
443 		switch (attr) {
444 		case hwmon_curr_input:
445 			reg = data->reg_input;
446 			break;
447 		case hwmon_curr_max:
448 			reg = data->reg_max;
449 			break;
450 		case hwmon_curr_crit:
451 			reg = data->reg_crit;
452 			break;
453 		default:
454 			return -EOPNOTSUPP;
455 		}
456 		break;
457 	case hwmon_power:
458 		switch (attr) {
459 		case hwmon_power_input:
460 			reg = data->reg_input;
461 			break;
462 		default:
463 			return -EOPNOTSUPP;
464 		}
465 		break;
466 	default:
467 		return -EOPNOTSUPP;
468 	}
469 
470 	if (!reg)
471 		return -EOPNOTSUPP;
472 
473 	ret = do_sensor_read(hw, data, reg, &value);
474 	if (ret)
475 		return ret;
476 
477 	if (reg_hyst) {
478 		ret = do_sensor_read(hw, data, reg_hyst, &hyst);
479 		if (ret)
480 			return ret;
481 
482 		value -= hyst;
483 	}
484 
485 	*val = value;
486 
487 	return 0;
488 }
489 
m10bmc_hwmon_read_string(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,const char ** str)490 static int m10bmc_hwmon_read_string(struct device *dev,
491 				    enum hwmon_sensor_types type,
492 				    u32 attr, int channel, const char **str)
493 {
494 	struct m10bmc_hwmon *hw = dev_get_drvdata(dev);
495 	const struct m10bmc_sdata *data;
496 
497 	data = find_sensor_data(hw, type, channel);
498 	if (IS_ERR(data))
499 		return PTR_ERR(data);
500 
501 	*str = data->label;
502 
503 	return 0;
504 }
505 
506 static const struct hwmon_ops m10bmc_hwmon_ops = {
507 	.is_visible = m10bmc_hwmon_is_visible,
508 	.read = m10bmc_hwmon_read,
509 	.read_string = m10bmc_hwmon_read_string,
510 };
511 
m10bmc_hwmon_probe(struct platform_device * pdev)512 static int m10bmc_hwmon_probe(struct platform_device *pdev)
513 {
514 	const struct platform_device_id *id = platform_get_device_id(pdev);
515 	struct intel_m10bmc *m10bmc = dev_get_drvdata(pdev->dev.parent);
516 	struct device *hwmon_dev, *dev = &pdev->dev;
517 	struct m10bmc_hwmon *hw;
518 	int i;
519 
520 	hw = devm_kzalloc(dev, sizeof(*hw), GFP_KERNEL);
521 	if (!hw)
522 		return -ENOMEM;
523 
524 	hw->dev = dev;
525 	hw->m10bmc = m10bmc;
526 	hw->bdata = (const struct m10bmc_hwmon_board_data *)id->driver_data;
527 
528 	hw->chip.info = hw->bdata->hinfo;
529 	hw->chip.ops = &m10bmc_hwmon_ops;
530 
531 	hw->hw_name = devm_kstrdup(dev, id->name, GFP_KERNEL);
532 	if (!hw->hw_name)
533 		return -ENOMEM;
534 
535 	for (i = 0; hw->hw_name[i]; i++)
536 		if (hwmon_is_bad_char(hw->hw_name[i]))
537 			hw->hw_name[i] = '_';
538 
539 	hwmon_dev = devm_hwmon_device_register_with_info(dev, hw->hw_name,
540 							 hw, &hw->chip, NULL);
541 	return PTR_ERR_OR_ZERO(hwmon_dev);
542 }
543 
544 static const struct platform_device_id intel_m10bmc_hwmon_ids[] = {
545 	{
546 		.name = "n3000bmc-hwmon",
547 		.driver_data = (unsigned long)&n3000bmc_hwmon_bdata,
548 	},
549 	{
550 		.name = "d5005bmc-hwmon",
551 		.driver_data = (unsigned long)&d5005bmc_hwmon_bdata,
552 	},
553 	{
554 		.name = "n5010bmc-hwmon",
555 		.driver_data = (unsigned long)&n5010bmc_hwmon_bdata,
556 	},
557 	{ }
558 };
559 
560 static struct platform_driver intel_m10bmc_hwmon_driver = {
561 	.probe = m10bmc_hwmon_probe,
562 	.driver = {
563 		.name = "intel-m10-bmc-hwmon",
564 	},
565 	.id_table = intel_m10bmc_hwmon_ids,
566 };
567 module_platform_driver(intel_m10bmc_hwmon_driver);
568 
569 MODULE_DEVICE_TABLE(platform, intel_m10bmc_hwmon_ids);
570 MODULE_AUTHOR("Intel Corporation");
571 MODULE_DESCRIPTION("Intel MAX 10 BMC hardware monitor");
572 MODULE_LICENSE("GPL");
573