drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_desc.c

   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 int 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
 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         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(&acc_input.common_property, report_id);
 204                 acc_input.in_accel_x_value = amd_sfh_float_to_int(accel_data.acceldata.x) / 100;
 205                 acc_input.in_accel_y_value = amd_sfh_float_to_int(accel_data.acceldata.y) / 100;
 206                 acc_input.in_accel_z_value = amd_sfh_float_to_int(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(&gyro_input.common_property, report_id);
 215                 gyro_input.in_angel_x_value = amd_sfh_float_to_int(gyro_data.gyrodata.x) / 1000;
 216                 gyro_input.in_angel_y_value = amd_sfh_float_to_int(gyro_data.gyrodata.y) / 1000;
 217                 gyro_input.in_angel_z_value = amd_sfh_float_to_int(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(&magno_input.common_property, report_id);
 226                 magno_input.in_magno_x = amd_sfh_float_to_int(mag_data.magdata.x) / 100;
 227                 magno_input.in_magno_y = amd_sfh_float_to_int(mag_data.magdata.y) / 100;
 228                 magno_input.in_magno_z = amd_sfh_float_to_int(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(&als_input.common_property, report_id);
 238                 als_input.illuminance_value = amd_sfh_float_to_int(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(als_data.chromaticity_x);
 245                         als_input.chromaticity_y_value =
 246                                 amd_sfh_float_to_int(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(&hpd_input.common_property, report_id);
 254                 hpdstatus.val = readl(mp2->mmio + amd_get_c2p_val(mp2, 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
 263 static 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
 321 void 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 }