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 
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 
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 
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 
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 
135 static int float_to_int(u32 float32)
136 {
137 	int fraction, shift, mantissa, sign, exp, zeropre;
138 
139 	mantissa = float32 & GENMASK(22, 0);
140 	sign = (float32 & BIT(31)) ? -1 : 1;
141 	exp = (float32 & ~BIT(31)) >> 23;
142 
143 	if (!exp && !mantissa)
144 		return 0;
145 
146 	exp -= 127;
147 	if (exp < 0) {
148 		exp = -exp;
149 		zeropre = (((BIT(23) + mantissa) * 100) >> 23) >> exp;
150 		return zeropre >= 50 ? sign : 0;
151 	}
152 
153 	shift = 23 - exp;
154 	float32 = BIT(exp) + (mantissa >> shift);
155 	fraction = mantissa & GENMASK(shift - 1, 0);
156 
157 	return (((fraction * 100) >> shift) >= 50) ? sign * (float32 + 1) : sign * float32;
158 }
159 
160 static u8 get_input_rep(u8 current_index, int sensor_idx, int report_id,
161 			struct amd_input_data *in_data)
162 {
163 	struct amd_mp2_dev *mp2 = container_of(in_data, struct amd_mp2_dev, in_data);
164 	u8 *input_report = in_data->input_report[current_index];
165 	struct magno_input_report magno_input;
166 	struct accel3_input_report acc_input;
167 	struct gyro_input_report gyro_input;
168 	struct als_input_report als_input;
169 	struct hpd_input_report hpd_input;
170 	struct sfh_accel_data accel_data;
171 	struct sfh_gyro_data gyro_data;
172 	struct sfh_mag_data mag_data;
173 	struct sfh_als_data als_data;
174 	struct hpd_status hpdstatus;
175 	void __iomem *sensoraddr;
176 	u8 report_size = 0;
177 
178 	if (!input_report)
179 		return report_size;
180 
181 	switch (sensor_idx) {
182 	case ACCEL_IDX: /* accelerometer */
183 		sensoraddr = mp2->vsbase + (ACCEL_IDX * SENSOR_DATA_MEM_SIZE_DEFAULT) +
184 			     OFFSET_SENSOR_DATA_DEFAULT;
185 		memcpy_fromio(&accel_data, sensoraddr, sizeof(struct sfh_accel_data));
186 		get_common_inputs(&acc_input.common_property, report_id);
187 		acc_input.in_accel_x_value = float_to_int(accel_data.acceldata.x) / 100;
188 		acc_input.in_accel_y_value = float_to_int(accel_data.acceldata.y) / 100;
189 		acc_input.in_accel_z_value = float_to_int(accel_data.acceldata.z) / 100;
190 		memcpy(input_report, &acc_input, sizeof(acc_input));
191 		report_size = sizeof(acc_input);
192 		break;
193 	case GYRO_IDX: /* gyroscope */
194 		sensoraddr = mp2->vsbase + (GYRO_IDX * SENSOR_DATA_MEM_SIZE_DEFAULT) +
195 			     OFFSET_SENSOR_DATA_DEFAULT;
196 		memcpy_fromio(&gyro_data, sensoraddr, sizeof(struct sfh_gyro_data));
197 		get_common_inputs(&gyro_input.common_property, report_id);
198 		gyro_input.in_angel_x_value = float_to_int(gyro_data.gyrodata.x) / 1000;
199 		gyro_input.in_angel_y_value = float_to_int(gyro_data.gyrodata.y) / 1000;
200 		gyro_input.in_angel_z_value = float_to_int(gyro_data.gyrodata.z) / 1000;
201 		memcpy(input_report, &gyro_input, sizeof(gyro_input));
202 		report_size = sizeof(gyro_input);
203 		break;
204 	case MAG_IDX: /* magnetometer */
205 		sensoraddr = mp2->vsbase + (MAG_IDX * SENSOR_DATA_MEM_SIZE_DEFAULT) +
206 			     OFFSET_SENSOR_DATA_DEFAULT;
207 		memcpy_fromio(&mag_data, sensoraddr, sizeof(struct sfh_mag_data));
208 		get_common_inputs(&magno_input.common_property, report_id);
209 		magno_input.in_magno_x = float_to_int(mag_data.magdata.x) / 100;
210 		magno_input.in_magno_y = float_to_int(mag_data.magdata.y) / 100;
211 		magno_input.in_magno_z = float_to_int(mag_data.magdata.z) / 100;
212 		magno_input.in_magno_accuracy = mag_data.accuracy / 100;
213 		memcpy(input_report, &magno_input, sizeof(magno_input));
214 		report_size = sizeof(magno_input);
215 		break;
216 	case ALS_IDX:
217 		sensoraddr = mp2->vsbase + (ALS_IDX * SENSOR_DATA_MEM_SIZE_DEFAULT) +
218 			     OFFSET_SENSOR_DATA_DEFAULT;
219 		memcpy_fromio(&als_data, sensoraddr, sizeof(struct sfh_als_data));
220 		get_common_inputs(&als_input.common_property, report_id);
221 		als_input.illuminance_value = float_to_int(als_data.lux);
222 		report_size = sizeof(als_input);
223 		memcpy(input_report, &als_input, sizeof(als_input));
224 		break;
225 	case HPD_IDX:
226 		get_common_inputs(&hpd_input.common_property, report_id);
227 		hpdstatus.val = readl(mp2->mmio + AMD_C2P_MSG(4));
228 		hpd_input.human_presence = hpdstatus.shpd.presence;
229 		report_size = sizeof(hpd_input);
230 		memcpy(input_report, &hpd_input, sizeof(hpd_input));
231 		break;
232 	}
233 	return report_size;
234 }
235 
236 static u32 get_desc_size(int sensor_idx, int descriptor_name)
237 {
238 	switch (sensor_idx) {
239 	case ACCEL_IDX:
240 		switch (descriptor_name) {
241 		case descr_size:
242 			return sizeof(accel3_report_descriptor);
243 		case input_size:
244 			return sizeof(struct accel3_input_report);
245 		case feature_size:
246 			return sizeof(struct accel3_feature_report);
247 		}
248 		break;
249 	case GYRO_IDX:
250 		switch (descriptor_name) {
251 		case descr_size:
252 			return sizeof(gyro3_report_descriptor);
253 		case input_size:
254 			return sizeof(struct gyro_input_report);
255 		case feature_size:
256 			return sizeof(struct gyro_feature_report);
257 		}
258 		break;
259 	case MAG_IDX:
260 		switch (descriptor_name) {
261 		case descr_size:
262 			return sizeof(comp3_report_descriptor);
263 		case input_size:
264 			return sizeof(struct magno_input_report);
265 		case feature_size:
266 			return sizeof(struct magno_feature_report);
267 		}
268 		break;
269 	case ALS_IDX:
270 		switch (descriptor_name) {
271 		case descr_size:
272 			return sizeof(als_report_descriptor);
273 		case input_size:
274 			return sizeof(struct als_input_report);
275 		case feature_size:
276 			return sizeof(struct als_feature_report);
277 		}
278 		break;
279 	case HPD_IDX:
280 		switch (descriptor_name) {
281 		case descr_size:
282 			return sizeof(hpd_report_descriptor);
283 		case input_size:
284 			return sizeof(struct hpd_input_report);
285 		case feature_size:
286 			return sizeof(struct hpd_feature_report);
287 		}
288 		break;
289 	}
290 
291 	return 0;
292 }
293 
294 void amd_sfh1_1_set_desc_ops(struct amd_mp2_ops *mp2_ops)
295 {
296 	mp2_ops->get_rep_desc = get_report_desc;
297 	mp2_ops->get_feat_rep = get_feature_rep;
298 	mp2_ops->get_desc_sz = get_desc_size;
299 	mp2_ops->get_in_rep = get_input_rep;
300 }
301