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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * AMD MP2 1.1 communication driver
   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/delay.h>
  12 #include <linux/hid.h>
  13
  14 #include "amd_sfh_init.h"
  15 #include "amd_sfh_interface.h"
  16 #include "../hid_descriptor/amd_sfh_hid_desc.h"
  17
  18 static int amd_sfh_get_sensor_num(struct amd_mp2_dev *mp2, u8 *sensor_id)
  19 {
  20         struct sfh_sensor_list *slist;
  21         struct sfh_base_info binfo;
  22         int num_of_sensors = 0;
  23         int i;
  24
  25         memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info));
  26         slist = &binfo.sbase.s_list;
  27
  28         for (i = 0; i < MAX_IDX; i++) {
  29                 switch (i) {
  30                 case ACCEL_IDX:
  31                 case GYRO_IDX:
  32                 case MAG_IDX:
  33                 case ALS_IDX:
  34                 case HPD_IDX:
  35                         if (BIT(i) & slist->sl.sensors)
  36                                 sensor_id[num_of_sensors++] = i;
  37                         break;
  38                 }
  39         }
  40
  41         return num_of_sensors;
  42 }
  43
  44 static u32 amd_sfh_wait_for_response(struct amd_mp2_dev *mp2, u8 sid, u32 cmd_id)
  45 {
  46         if (mp2->mp2_ops->response)
  47                 return mp2->mp2_ops->response(mp2, sid, cmd_id);
  48
  49         return 0;
  50 }
  51
  52 static const char *get_sensor_name(int idx)
  53 {
  54         switch (idx) {
  55         case ACCEL_IDX:
  56                 return "accelerometer";
  57         case GYRO_IDX:
  58                 return "gyroscope";
  59         case MAG_IDX:
  60                 return "magnetometer";
  61         case ALS_IDX:
  62                 return "ALS";
  63         case HPD_IDX:
  64                 return "HPD";
  65         default:
  66                 return "unknown sensor type";
  67         }
  68 }
  69
  70 static int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata)
  71 {
  72         struct amdtp_cl_data *cl_data = privdata->cl_data;
  73         int i, status;
  74
  75         for (i = 0; i < cl_data->num_hid_devices; i++) {
  76                 switch (cl_data->sensor_idx[i]) {
  77                 case HPD_IDX:
  78                         privdata->dev_en.is_hpd_present = false;
  79                         break;
  80                 case ALS_IDX:
  81                         privdata->dev_en.is_als_present = false;
  82                         break;
  83                 }
  84
  85                 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
  86                         privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
  87                         status = amd_sfh_wait_for_response
  88                                         (privdata, cl_data->sensor_idx[i], DISABLE_SENSOR);
  89                         if (status == 0)
  90                                 cl_data->sensor_sts[i] = SENSOR_DISABLED;
  91                         dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x (%s) status 0x%x\n",
  92                                 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
  93                                 cl_data->sensor_sts[i]);
  94                 }
  95         }
  96
  97         cancel_delayed_work_sync(&cl_data->work);
  98         cancel_delayed_work_sync(&cl_data->work_buffer);
  99         amdtp_hid_remove(cl_data);
 100
 101         return 0;
 102 }
 103
 104 static int amd_sfh1_1_hid_client_init(struct amd_mp2_dev *privdata)
 105 {
 106         struct amd_input_data *in_data = &privdata->in_data;
 107         struct amdtp_cl_data *cl_data = privdata->cl_data;
 108         struct amd_mp2_ops *mp2_ops = privdata->mp2_ops;
 109         struct amd_mp2_sensor_info info;
 110         struct request_list *req_list;
 111         u32 feature_report_size;
 112         u32 input_report_size;
 113         struct device *dev;
 114         int rc, i, status;
 115         u8 cl_idx;
 116
 117         req_list = &cl_data->req_list;
 118         dev = &privdata->pdev->dev;
 119         amd_sfh1_1_set_desc_ops(mp2_ops);
 120
 121         cl_data->num_hid_devices = amd_sfh_get_sensor_num(privdata, &cl_data->sensor_idx[0]);
 122         if (cl_data->num_hid_devices == 0)
 123                 return -ENODEV;
 124         cl_data->is_any_sensor_enabled = false;
 125
 126         INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work);
 127         INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer);
 128         INIT_LIST_HEAD(&req_list->list);
 129         cl_data->in_data = in_data;
 130
 131         for (i = 0; i < cl_data->num_hid_devices; i++) {
 132                 cl_data->sensor_sts[i] = SENSOR_DISABLED;
 133                 cl_data->sensor_requested_cnt[i] = 0;
 134                 cl_data->cur_hid_dev = i;
 135                 cl_idx = cl_data->sensor_idx[i];
 136
 137                 cl_data->report_descr_sz[i] = mp2_ops->get_desc_sz(cl_idx, descr_size);
 138                 if (!cl_data->report_descr_sz[i]) {
 139                         rc = -EINVAL;
 140                         goto cleanup;
 141                 }
 142                 feature_report_size = mp2_ops->get_desc_sz(cl_idx, feature_size);
 143                 if (!feature_report_size) {
 144                         rc = -EINVAL;
 145                         goto cleanup;
 146                 }
 147                 input_report_size =  mp2_ops->get_desc_sz(cl_idx, input_size);
 148                 if (!input_report_size) {
 149                         rc = -EINVAL;
 150                         goto cleanup;
 151                 }
 152                 cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL);
 153                 if (!cl_data->feature_report[i]) {
 154                         rc = -ENOMEM;
 155                         goto cleanup;
 156                 }
 157                 in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL);
 158                 if (!in_data->input_report[i]) {
 159                         rc = -ENOMEM;
 160                         goto cleanup;
 161                 }
 162
 163                 info.sensor_idx = cl_idx;
 164
 165                 cl_data->report_descr[i] =
 166                         devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL);
 167                 if (!cl_data->report_descr[i]) {
 168                         rc = -ENOMEM;
 169                         goto cleanup;
 170                 }
 171                 rc = mp2_ops->get_rep_desc(cl_idx, cl_data->report_descr[i]);
 172                 if (rc)
 173                         goto cleanup;
 174
 175                 writel(0, privdata->mmio + amd_get_p2c_val(privdata, 0));
 176                 mp2_ops->start(privdata, info);
 177                 status = amd_sfh_wait_for_response
 178                                 (privdata, cl_data->sensor_idx[i], ENABLE_SENSOR);
 179
 180                 cl_data->sensor_sts[i] = (status == 0) ? SENSOR_ENABLED : SENSOR_DISABLED;
 181         }
 182
 183         for (i = 0; i < cl_data->num_hid_devices; i++) {
 184                 cl_data->cur_hid_dev = i;
 185                 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
 186                         cl_data->is_any_sensor_enabled = true;
 187                         rc = amdtp_hid_probe(i, cl_data);
 188                         if (rc)
 189                                 goto cleanup;
 190                         switch (cl_data->sensor_idx[i]) {
 191                         case HPD_IDX:
 192                                 privdata->dev_en.is_hpd_present = true;
 193                                 break;
 194                         case ALS_IDX:
 195                                 privdata->dev_en.is_als_present = true;
 196                                 break;
 197                         }
 198                 }
 199                 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
 200                         cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
 201                         cl_data->sensor_sts[i]);
 202         }
 203
 204         if (!cl_data->is_any_sensor_enabled) {
 205                 dev_warn(dev, "No sensor registered, sensors not enabled is %d\n",
 206                          cl_data->is_any_sensor_enabled);
 207                 rc = -EOPNOTSUPP;
 208                 goto cleanup;
 209         }
 210
 211         schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
 212         return 0;
 213
 214 cleanup:
 215         amd_sfh_hid_client_deinit(privdata);
 216         for (i = 0; i < cl_data->num_hid_devices; i++) {
 217                 devm_kfree(dev, cl_data->feature_report[i]);
 218                 devm_kfree(dev, in_data->input_report[i]);
 219                 devm_kfree(dev, cl_data->report_descr[i]);
 220         }
 221         return rc;
 222 }
 223
 224 static void amd_sfh_resume(struct amd_mp2_dev *mp2)
 225 {
 226         struct amdtp_cl_data *cl_data = mp2->cl_data;
 227         struct amd_mp2_sensor_info info;
 228         int i, status;
 229
 230         if (!cl_data->is_any_sensor_enabled) {
 231                 amd_sfh_clear_intr(mp2);
 232                 return;
 233         }
 234
 235         for (i = 0; i < cl_data->num_hid_devices; i++) {
 236                 if (cl_data->sensor_sts[i] == SENSOR_DISABLED) {
 237                         info.sensor_idx = cl_data->sensor_idx[i];
 238                         mp2->mp2_ops->start(mp2, info);
 239                         status = amd_sfh_wait_for_response
 240                                         (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR);
 241                         if (status == 0)
 242                                 status = SENSOR_ENABLED;
 243                         if (status == SENSOR_ENABLED)
 244                                 cl_data->sensor_sts[i] = SENSOR_ENABLED;
 245                         dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n",
 246                                 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
 247                                 cl_data->sensor_sts[i]);
 248                 }
 249         }
 250
 251         schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
 252         amd_sfh_clear_intr(mp2);
 253 }
 254
 255 static void amd_sfh_suspend(struct amd_mp2_dev *mp2)
 256 {
 257         struct amdtp_cl_data *cl_data = mp2->cl_data;
 258         int i, status;
 259
 260         if (!cl_data->is_any_sensor_enabled) {
 261                 amd_sfh_clear_intr(mp2);
 262                 return;
 263         }
 264
 265         for (i = 0; i < cl_data->num_hid_devices; i++) {
 266                 if (cl_data->sensor_idx[i] != HPD_IDX &&
 267                     cl_data->sensor_sts[i] == SENSOR_ENABLED) {
 268                         mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
 269                         status = amd_sfh_wait_for_response
 270                                         (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR);
 271                         if (status == 0)
 272                                 status = SENSOR_DISABLED;
 273                         if (status != SENSOR_ENABLED)
 274                                 cl_data->sensor_sts[i] = SENSOR_DISABLED;
 275                         dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n",
 276                                 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
 277                                 cl_data->sensor_sts[i]);
 278                 }
 279         }
 280
 281         cancel_delayed_work_sync(&cl_data->work_buffer);
 282         amd_sfh_clear_intr(mp2);
 283 }
 284
 285 static void amd_mp2_pci_remove(void *privdata)
 286 {
 287         struct amd_mp2_dev *mp2 = privdata;
 288
 289         sfh_deinit_emp2();
 290         amd_sfh_hid_client_deinit(privdata);
 291         mp2->mp2_ops->stop_all(mp2);
 292         pci_intx(mp2->pdev, false);
 293         amd_sfh_clear_intr(mp2);
 294 }
 295
 296 static void amd_sfh_set_ops(struct amd_mp2_dev *mp2)
 297 {
 298         struct amd_mp2_ops *mp2_ops;
 299
 300         sfh_interface_init(mp2);
 301         mp2_ops = mp2->mp2_ops;
 302         mp2_ops->clear_intr = amd_sfh_clear_intr_v2;
 303         mp2_ops->init_intr = amd_sfh_irq_init_v2;
 304         mp2_ops->suspend = amd_sfh_suspend;
 305         mp2_ops->resume = amd_sfh_resume;
 306         mp2_ops->remove = amd_mp2_pci_remove;
 307 }
 308
 309 int amd_sfh1_1_init(struct amd_mp2_dev *mp2)
 310 {
 311         u32 phy_base = readl(mp2->mmio + amd_get_c2p_val(mp2, 22));
 312         struct device *dev = &mp2->pdev->dev;
 313         struct sfh_base_info binfo;
 314         int rc;
 315
 316         phy_base <<= 21;
 317         if (!devm_request_mem_region(dev, phy_base, 128 * 1024, "amd_sfh")) {
 318                 dev_dbg(dev, "can't reserve mmio registers\n");
 319                 return -ENOMEM;
 320         }
 321
 322         mp2->vsbase = devm_ioremap(dev, phy_base, 128 * 1024);
 323         if (!mp2->vsbase) {
 324                 dev_dbg(dev, "failed to remap vsbase\n");
 325                 return -ENOMEM;
 326         }
 327
 328         /* Before accessing give time for SFH firmware for processing configuration */
 329         msleep(5000);
 330
 331         memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info));
 332         if (binfo.sbase.fw_info.fw_ver == 0 || binfo.sbase.s_list.sl.sensors == 0) {
 333                 dev_dbg(dev, "No sensor registered\n");
 334                 return -EOPNOTSUPP;
 335         }
 336         dev_dbg(dev, "firmware version 0x%x\n", binfo.sbase.fw_info.fw_ver);
 337
 338         amd_sfh_set_ops(mp2);
 339
 340         rc = amd_sfh_irq_init(mp2);
 341         if (rc) {
 342                 sfh_deinit_emp2();
 343                 dev_err(dev, "amd_sfh_irq_init failed\n");
 344                 return rc;
 345         }
 346
 347         rc = amd_sfh1_1_hid_client_init(mp2);
 348         if (rc) {
 349                 sfh_deinit_emp2();
 350                 if ((rc != -ENODEV) && (rc != -EOPNOTSUPP))
 351                         dev_err(dev, "amd_sfh1_1_hid_client_init failed\n");
 352                 return rc;
 353         }
 354
 355         return rc;
 356 }