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
29static 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
61static 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
71static 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(common: &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(common: &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(common: &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(common: &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(common: &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
128static 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
135int amd_sfh_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
176static 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 struct sfh_base_info binfo;
192 void __iomem *sensoraddr;
193 u8 report_size = 0;
194
195 if (!input_report)
196 return report_size;
197
198 switch (sensor_idx) {
199 case ACCEL_IDX: /* accelerometer */
200 sensoraddr = mp2->vsbase + (ACCEL_IDX * SENSOR_DATA_MEM_SIZE_DEFAULT) +
201 OFFSET_SENSOR_DATA_DEFAULT;
202 memcpy_fromio(&accel_data, sensoraddr, sizeof(struct sfh_accel_data));
203 get_common_inputs(common: &acc_input.common_property, report_id);
204 acc_input.in_accel_x_value = amd_sfh_float_to_int(flt32_val: accel_data.acceldata.x) / 100;
205 acc_input.in_accel_y_value = amd_sfh_float_to_int(flt32_val: accel_data.acceldata.y) / 100;
206 acc_input.in_accel_z_value = amd_sfh_float_to_int(flt32_val: accel_data.acceldata.z) / 100;
207 memcpy(input_report, &acc_input, sizeof(acc_input));
208 report_size = sizeof(acc_input);
209 break;
210 case GYRO_IDX: /* gyroscope */
211 sensoraddr = mp2->vsbase + (GYRO_IDX * SENSOR_DATA_MEM_SIZE_DEFAULT) +
212 OFFSET_SENSOR_DATA_DEFAULT;
213 memcpy_fromio(&gyro_data, sensoraddr, sizeof(struct sfh_gyro_data));
214 get_common_inputs(common: &gyro_input.common_property, report_id);
215 gyro_input.in_angel_x_value = amd_sfh_float_to_int(flt32_val: gyro_data.gyrodata.x) / 1000;
216 gyro_input.in_angel_y_value = amd_sfh_float_to_int(flt32_val: gyro_data.gyrodata.y) / 1000;
217 gyro_input.in_angel_z_value = amd_sfh_float_to_int(flt32_val: gyro_data.gyrodata.z) / 1000;
218 memcpy(input_report, &gyro_input, sizeof(gyro_input));
219 report_size = sizeof(gyro_input);
220 break;
221 case MAG_IDX: /* magnetometer */
222 sensoraddr = mp2->vsbase + (MAG_IDX * SENSOR_DATA_MEM_SIZE_DEFAULT) +
223 OFFSET_SENSOR_DATA_DEFAULT;
224 memcpy_fromio(&mag_data, sensoraddr, sizeof(struct sfh_mag_data));
225 get_common_inputs(common: &magno_input.common_property, report_id);
226 magno_input.in_magno_x = amd_sfh_float_to_int(flt32_val: mag_data.magdata.x) / 100;
227 magno_input.in_magno_y = amd_sfh_float_to_int(flt32_val: mag_data.magdata.y) / 100;
228 magno_input.in_magno_z = amd_sfh_float_to_int(flt32_val: mag_data.magdata.z) / 100;
229 magno_input.in_magno_accuracy = mag_data.accuracy / 100;
230 memcpy(input_report, &magno_input, sizeof(magno_input));
231 report_size = sizeof(magno_input);
232 break;
233 case ALS_IDX:
234 sensoraddr = mp2->vsbase + (ALS_IDX * SENSOR_DATA_MEM_SIZE_DEFAULT) +
235 OFFSET_SENSOR_DATA_DEFAULT;
236 memcpy_fromio(&als_data, sensoraddr, sizeof(struct sfh_als_data));
237 get_common_inputs(common: &als_input.common_property, report_id);
238 als_input.illuminance_value = amd_sfh_float_to_int(flt32_val: als_data.lux);
239
240 memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info));
241 if (binfo.sbase.s_prop[ALS_IDX].sf.feat & 0x2) {
242 als_input.light_color_temp = als_data.light_color_temp;
243 als_input.chromaticity_x_value =
244 amd_sfh_float_to_int(flt32_val: als_data.chromaticity_x);
245 als_input.chromaticity_y_value =
246 amd_sfh_float_to_int(flt32_val: als_data.chromaticity_y);
247 }
248
249 report_size = sizeof(als_input);
250 memcpy(input_report, &als_input, sizeof(als_input));
251 break;
252 case HPD_IDX:
253 get_common_inputs(common: &hpd_input.common_property, report_id);
254 hpdstatus.val = readl(addr: mp2->mmio + amd_get_c2p_val(mp2, idx: 4));
255 hpd_input.human_presence = hpdstatus.shpd.presence;
256 report_size = sizeof(hpd_input);
257 memcpy(input_report, &hpd_input, sizeof(hpd_input));
258 break;
259 }
260 return report_size;
261}
262
263static u32 get_desc_size(int sensor_idx, int descriptor_name)
264{
265 switch (sensor_idx) {
266 case ACCEL_IDX:
267 switch (descriptor_name) {
268 case descr_size:
269 return sizeof(accel3_report_descriptor);
270 case input_size:
271 return sizeof(struct accel3_input_report);
272 case feature_size:
273 return sizeof(struct accel3_feature_report);
274 }
275 break;
276 case GYRO_IDX:
277 switch (descriptor_name) {
278 case descr_size:
279 return sizeof(gyro3_report_descriptor);
280 case input_size:
281 return sizeof(struct gyro_input_report);
282 case feature_size:
283 return sizeof(struct gyro_feature_report);
284 }
285 break;
286 case MAG_IDX:
287 switch (descriptor_name) {
288 case descr_size:
289 return sizeof(comp3_report_descriptor);
290 case input_size:
291 return sizeof(struct magno_input_report);
292 case feature_size:
293 return sizeof(struct magno_feature_report);
294 }
295 break;
296 case ALS_IDX:
297 switch (descriptor_name) {
298 case descr_size:
299 return sizeof(als_report_descriptor);
300 case input_size:
301 return sizeof(struct als_input_report);
302 case feature_size:
303 return sizeof(struct als_feature_report);
304 }
305 break;
306 case HPD_IDX:
307 switch (descriptor_name) {
308 case descr_size:
309 return sizeof(hpd_report_descriptor);
310 case input_size:
311 return sizeof(struct hpd_input_report);
312 case feature_size:
313 return sizeof(struct hpd_feature_report);
314 }
315 break;
316 }
317
318 return 0;
319}
320
321void amd_sfh1_1_set_desc_ops(struct amd_mp2_ops *mp2_ops)
322{
323 mp2_ops->get_rep_desc = get_report_desc;
324 mp2_ops->get_feat_rep = get_feature_rep;
325 mp2_ops->get_desc_sz = get_desc_size;
326 mp2_ops->get_in_rep = get_input_rep;
327}
328

source code of linux/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_desc.c