1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * AMD MP2 1.1 descriptor interfaces
4 *
5 * Copyright (c) 2022, Advanced Micro Devices, Inc.
6 * All Rights Reserved.
7 *
8 * Author: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
9 */
10
11 #include <linux/hid-sensor-ids.h>
12
13 #include "amd_sfh_interface.h"
14 #include "../hid_descriptor/amd_sfh_hid_desc.h"
15 #include "../hid_descriptor/amd_sfh_hid_report_desc.h"
16
17 #define SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM 0x41
18 #define SENSOR_PROP_POWER_STATE_D0_FULL_POWER_ENUM 0x51
19 #define HID_DEFAULT_REPORT_INTERVAL 0x50
20 #define HID_DEFAULT_MIN_VALUE 0X7F
21 #define HID_DEFAULT_MAX_VALUE 0x80
22 #define HID_DEFAULT_SENSITIVITY 0x7F
23 #define HID_USAGE_SENSOR_PROPERTY_CONNECTION_TYPE_PC_INTEGRATED_ENUM 0x01
24 /* state enums */
25 #define HID_USAGE_SENSOR_STATE_READY_ENUM 0x02
26 #define HID_USAGE_SENSOR_STATE_INITIALIZING_ENUM 0x05
27 #define HID_USAGE_SENSOR_EVENT_DATA_UPDATED_ENUM 0x04
28
get_report_desc(int sensor_idx,u8 * rep_desc)29 static int get_report_desc(int sensor_idx, u8 *rep_desc)
30 {
31 switch (sensor_idx) {
32 case ACCEL_IDX: /* accelerometer */
33 memset(rep_desc, 0, sizeof(accel3_report_descriptor));
34 memcpy(rep_desc, accel3_report_descriptor,
35 sizeof(accel3_report_descriptor));
36 break;
37 case GYRO_IDX: /* gyroscope */
38 memset(rep_desc, 0, sizeof(gyro3_report_descriptor));
39 memcpy(rep_desc, gyro3_report_descriptor,
40 sizeof(gyro3_report_descriptor));
41 break;
42 case MAG_IDX: /* magnetometer */
43 memset(rep_desc, 0, sizeof(comp3_report_descriptor));
44 memcpy(rep_desc, comp3_report_descriptor,
45 sizeof(comp3_report_descriptor));
46 break;
47 case ALS_IDX: /* ambient light sensor */
48 memset(rep_desc, 0, sizeof(als_report_descriptor));
49 memcpy(rep_desc, als_report_descriptor,
50 sizeof(als_report_descriptor));
51 break;
52 case HPD_IDX: /* HPD sensor */
53 memset(rep_desc, 0, sizeof(hpd_report_descriptor));
54 memcpy(rep_desc, hpd_report_descriptor,
55 sizeof(hpd_report_descriptor));
56 break;
57 }
58 return 0;
59 }
60
get_common_features(struct common_feature_property * common,int report_id)61 static void get_common_features(struct common_feature_property *common, int report_id)
62 {
63 common->report_id = report_id;
64 common->connection_type = HID_USAGE_SENSOR_PROPERTY_CONNECTION_TYPE_PC_INTEGRATED_ENUM;
65 common->report_state = SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM;
66 common->power_state = SENSOR_PROP_POWER_STATE_D0_FULL_POWER_ENUM;
67 common->sensor_state = HID_USAGE_SENSOR_STATE_INITIALIZING_ENUM;
68 common->report_interval = HID_DEFAULT_REPORT_INTERVAL;
69 }
70
get_feature_rep(int sensor_idx,int report_id,u8 * feature_report)71 static u8 get_feature_rep(int sensor_idx, int report_id, u8 *feature_report)
72 {
73 struct magno_feature_report magno_feature;
74 struct accel3_feature_report acc_feature;
75 struct gyro_feature_report gyro_feature;
76 struct hpd_feature_report hpd_feature;
77 struct als_feature_report als_feature;
78 u8 report_size = 0;
79
80 if (!feature_report)
81 return report_size;
82
83 switch (sensor_idx) {
84 case ACCEL_IDX: /* accelerometer */
85 get_common_features(&acc_feature.common_property, report_id);
86 acc_feature.accel_change_sesnitivity = HID_DEFAULT_SENSITIVITY;
87 acc_feature.accel_sensitivity_min = HID_DEFAULT_MIN_VALUE;
88 acc_feature.accel_sensitivity_max = HID_DEFAULT_MAX_VALUE;
89 memcpy(feature_report, &acc_feature, sizeof(acc_feature));
90 report_size = sizeof(acc_feature);
91 break;
92 case GYRO_IDX: /* gyroscope */
93 get_common_features(&gyro_feature.common_property, report_id);
94 gyro_feature.gyro_change_sesnitivity = HID_DEFAULT_SENSITIVITY;
95 gyro_feature.gyro_sensitivity_min = HID_DEFAULT_MIN_VALUE;
96 gyro_feature.gyro_sensitivity_max = HID_DEFAULT_MAX_VALUE;
97 memcpy(feature_report, &gyro_feature, sizeof(gyro_feature));
98 report_size = sizeof(gyro_feature);
99 break;
100 case MAG_IDX: /* magnetometer */
101 get_common_features(&magno_feature.common_property, report_id);
102 magno_feature.magno_headingchange_sensitivity = HID_DEFAULT_SENSITIVITY;
103 magno_feature.heading_min = HID_DEFAULT_MIN_VALUE;
104 magno_feature.heading_max = HID_DEFAULT_MAX_VALUE;
105 magno_feature.flux_change_sensitivity = HID_DEFAULT_MIN_VALUE;
106 magno_feature.flux_min = HID_DEFAULT_MIN_VALUE;
107 magno_feature.flux_max = HID_DEFAULT_MAX_VALUE;
108 memcpy(feature_report, &magno_feature, sizeof(magno_feature));
109 report_size = sizeof(magno_feature);
110 break;
111 case ALS_IDX: /* ambient light sensor */
112 get_common_features(&als_feature.common_property, report_id);
113 als_feature.als_change_sesnitivity = HID_DEFAULT_SENSITIVITY;
114 als_feature.als_sensitivity_min = HID_DEFAULT_MIN_VALUE;
115 als_feature.als_sensitivity_max = HID_DEFAULT_MAX_VALUE;
116 memcpy(feature_report, &als_feature, sizeof(als_feature));
117 report_size = sizeof(als_feature);
118 break;
119 case HPD_IDX: /* human presence detection sensor */
120 get_common_features(&hpd_feature.common_property, report_id);
121 memcpy(feature_report, &hpd_feature, sizeof(hpd_feature));
122 report_size = sizeof(hpd_feature);
123 break;
124 }
125 return report_size;
126 }
127
get_common_inputs(struct common_input_property * common,int report_id)128 static void get_common_inputs(struct common_input_property *common, int report_id)
129 {
130 common->report_id = report_id;
131 common->sensor_state = HID_USAGE_SENSOR_STATE_READY_ENUM;
132 common->event_type = HID_USAGE_SENSOR_EVENT_DATA_UPDATED_ENUM;
133 }
134
float_to_int(u32 flt32_val)135 static int float_to_int(u32 flt32_val)
136 {
137 int fraction, shift, mantissa, sign, exp, zeropre;
138
139 mantissa = flt32_val & GENMASK(22, 0);
140 sign = (flt32_val & BIT(31)) ? -1 : 1;
141 exp = (flt32_val & ~BIT(31)) >> 23;
142
143 if (!exp && !mantissa)
144 return 0;
145
146 /*
147 * Calculate the exponent and fraction part of floating
148 * point representation.
149 */
150 exp -= 127;
151 if (exp < 0) {
152 exp = -exp;
153 if (exp >= BITS_PER_TYPE(u32))
154 return 0;
155 zeropre = (((BIT(23) + mantissa) * 100) >> 23) >> exp;
156 return zeropre >= 50 ? sign : 0;
157 }
158
159 shift = 23 - exp;
160 if (abs(shift) >= BITS_PER_TYPE(u32))
161 return 0;
162
163 if (shift < 0) {
164 shift = -shift;
165 flt32_val = BIT(exp) + (mantissa << shift);
166 shift = 0;
167 } else {
168 flt32_val = BIT(exp) + (mantissa >> shift);
169 }
170
171 fraction = (shift == 0) ? 0 : mantissa & GENMASK(shift - 1, 0);
172
173 return (((fraction * 100) >> shift) >= 50) ? sign * (flt32_val + 1) : sign * flt32_val;
174 }
175
get_input_rep(u8 current_index,int sensor_idx,int report_id,struct amd_input_data * in_data)176 static u8 get_input_rep(u8 current_index, int sensor_idx, int report_id,
177 struct amd_input_data *in_data)
178 {
179 struct amd_mp2_dev *mp2 = container_of(in_data, struct amd_mp2_dev, in_data);
180 u8 *input_report = in_data->input_report[current_index];
181 struct magno_input_report magno_input;
182 struct accel3_input_report acc_input;
183 struct gyro_input_report gyro_input;
184 struct als_input_report als_input;
185 struct hpd_input_report hpd_input;
186 struct sfh_accel_data accel_data;
187 struct sfh_gyro_data gyro_data;
188 struct sfh_mag_data mag_data;
189 struct sfh_als_data als_data;
190 struct hpd_status hpdstatus;
191 void __iomem *sensoraddr;
192 u8 report_size = 0;
193
194 if (!input_report)
195 return report_size;
196
197 switch (sensor_idx) {
198 case ACCEL_IDX: /* accelerometer */
199 sensoraddr = mp2->vsbase + (ACCEL_IDX * SENSOR_DATA_MEM_SIZE_DEFAULT) +
200 OFFSET_SENSOR_DATA_DEFAULT;
201 memcpy_fromio(&accel_data, sensoraddr, sizeof(struct sfh_accel_data));
202 get_common_inputs(&acc_input.common_property, report_id);
203 acc_input.in_accel_x_value = float_to_int(accel_data.acceldata.x) / 100;
204 acc_input.in_accel_y_value = float_to_int(accel_data.acceldata.y) / 100;
205 acc_input.in_accel_z_value = float_to_int(accel_data.acceldata.z) / 100;
206 memcpy(input_report, &acc_input, sizeof(acc_input));
207 report_size = sizeof(acc_input);
208 break;
209 case GYRO_IDX: /* gyroscope */
210 sensoraddr = mp2->vsbase + (GYRO_IDX * SENSOR_DATA_MEM_SIZE_DEFAULT) +
211 OFFSET_SENSOR_DATA_DEFAULT;
212 memcpy_fromio(&gyro_data, sensoraddr, sizeof(struct sfh_gyro_data));
213 get_common_inputs(&gyro_input.common_property, report_id);
214 gyro_input.in_angel_x_value = float_to_int(gyro_data.gyrodata.x) / 1000;
215 gyro_input.in_angel_y_value = float_to_int(gyro_data.gyrodata.y) / 1000;
216 gyro_input.in_angel_z_value = float_to_int(gyro_data.gyrodata.z) / 1000;
217 memcpy(input_report, &gyro_input, sizeof(gyro_input));
218 report_size = sizeof(gyro_input);
219 break;
220 case MAG_IDX: /* magnetometer */
221 sensoraddr = mp2->vsbase + (MAG_IDX * SENSOR_DATA_MEM_SIZE_DEFAULT) +
222 OFFSET_SENSOR_DATA_DEFAULT;
223 memcpy_fromio(&mag_data, sensoraddr, sizeof(struct sfh_mag_data));
224 get_common_inputs(&magno_input.common_property, report_id);
225 magno_input.in_magno_x = float_to_int(mag_data.magdata.x) / 100;
226 magno_input.in_magno_y = float_to_int(mag_data.magdata.y) / 100;
227 magno_input.in_magno_z = float_to_int(mag_data.magdata.z) / 100;
228 magno_input.in_magno_accuracy = mag_data.accuracy / 100;
229 memcpy(input_report, &magno_input, sizeof(magno_input));
230 report_size = sizeof(magno_input);
231 break;
232 case ALS_IDX:
233 sensoraddr = mp2->vsbase + (ALS_IDX * SENSOR_DATA_MEM_SIZE_DEFAULT) +
234 OFFSET_SENSOR_DATA_DEFAULT;
235 memcpy_fromio(&als_data, sensoraddr, sizeof(struct sfh_als_data));
236 get_common_inputs(&als_input.common_property, report_id);
237 als_input.illuminance_value = float_to_int(als_data.lux);
238 report_size = sizeof(als_input);
239 memcpy(input_report, &als_input, sizeof(als_input));
240 break;
241 case HPD_IDX:
242 get_common_inputs(&hpd_input.common_property, report_id);
243 hpdstatus.val = readl(mp2->mmio + AMD_C2P_MSG(4));
244 hpd_input.human_presence = hpdstatus.shpd.presence;
245 report_size = sizeof(hpd_input);
246 memcpy(input_report, &hpd_input, sizeof(hpd_input));
247 break;
248 }
249 return report_size;
250 }
251
get_desc_size(int sensor_idx,int descriptor_name)252 static u32 get_desc_size(int sensor_idx, int descriptor_name)
253 {
254 switch (sensor_idx) {
255 case ACCEL_IDX:
256 switch (descriptor_name) {
257 case descr_size:
258 return sizeof(accel3_report_descriptor);
259 case input_size:
260 return sizeof(struct accel3_input_report);
261 case feature_size:
262 return sizeof(struct accel3_feature_report);
263 }
264 break;
265 case GYRO_IDX:
266 switch (descriptor_name) {
267 case descr_size:
268 return sizeof(gyro3_report_descriptor);
269 case input_size:
270 return sizeof(struct gyro_input_report);
271 case feature_size:
272 return sizeof(struct gyro_feature_report);
273 }
274 break;
275 case MAG_IDX:
276 switch (descriptor_name) {
277 case descr_size:
278 return sizeof(comp3_report_descriptor);
279 case input_size:
280 return sizeof(struct magno_input_report);
281 case feature_size:
282 return sizeof(struct magno_feature_report);
283 }
284 break;
285 case ALS_IDX:
286 switch (descriptor_name) {
287 case descr_size:
288 return sizeof(als_report_descriptor);
289 case input_size:
290 return sizeof(struct als_input_report);
291 case feature_size:
292 return sizeof(struct als_feature_report);
293 }
294 break;
295 case HPD_IDX:
296 switch (descriptor_name) {
297 case descr_size:
298 return sizeof(hpd_report_descriptor);
299 case input_size:
300 return sizeof(struct hpd_input_report);
301 case feature_size:
302 return sizeof(struct hpd_feature_report);
303 }
304 break;
305 }
306
307 return 0;
308 }
309
amd_sfh1_1_set_desc_ops(struct amd_mp2_ops * mp2_ops)310 void amd_sfh1_1_set_desc_ops(struct amd_mp2_ops *mp2_ops)
311 {
312 mp2_ops->get_rep_desc = get_report_desc;
313 mp2_ops->get_feat_rep = get_feature_rep;
314 mp2_ops->get_desc_sz = get_desc_size;
315 mp2_ops->get_in_rep = get_input_rep;
316 }
317