drivers/hid/amd-sfh-hid/amd_sfh_client.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  AMD SFH Client Layer
   4  *  Copyright 2020-2021 Advanced Micro Devices, Inc.
   5  *  Authors: Nehal Bakulchandra Shah <Nehal-Bakulchandra.Shah@amd.com>
   6  *           Sandeep Singh <Sandeep.singh@amd.com>
   7  *           Basavaraj Natikar <Basavaraj.Natikar@amd.com>
   8  */
   9
  10 #include <linux/dma-mapping.h>
  11 #include <linux/hid.h>
  12 #include <linux/list.h>
  13 #include <linux/slab.h>
  14 #include <linux/workqueue.h>
  15 #include <linux/errno.h>
  16
  17 #include "hid_descriptor/amd_sfh_hid_desc.h"
  18 #include "amd_sfh_pcie.h"
  19 #include "amd_sfh_hid.h"
  20
  21 void amd_sfh_set_report(struct hid_device *hid, int report_id,
  22                         int report_type)
  23 {
  24         struct amdtp_hid_data *hid_data = hid->driver_data;
  25         struct amdtp_cl_data *cli_data = hid_data->cli_data;
  26         int i;
  27
  28         for (i = 0; i < cli_data->num_hid_devices; i++) {
  29                 if (cli_data->hid_sensor_hubs[i] == hid) {
  30                         cli_data->cur_hid_dev = i;
  31                         break;
  32                 }
  33         }
  34         amdtp_hid_wakeup(hid);
  35 }
  36
  37 int amd_sfh_get_report(struct hid_device *hid, int report_id, int report_type)
  38 {
  39         struct amdtp_hid_data *hid_data = hid->driver_data;
  40         struct amdtp_cl_data *cli_data = hid_data->cli_data;
  41         struct request_list *req_list = &cli_data->req_list;
  42         int i;
  43
  44         for (i = 0; i < cli_data->num_hid_devices; i++) {
  45                 if (cli_data->hid_sensor_hubs[i] == hid) {
  46                         struct request_list *new = kzalloc(sizeof(*new), GFP_KERNEL);
  47
  48                         if (!new)
  49                                 return -ENOMEM;
  50
  51                         new->current_index = i;
  52                         new->sensor_idx = cli_data->sensor_idx[i];
  53                         new->hid = hid;
  54                         new->report_type = report_type;
  55                         new->report_id = report_id;
  56                         cli_data->report_id[i] = report_id;
  57                         cli_data->request_done[i] = false;
  58                         list_add(&new->list, &req_list->list);
  59                         break;
  60                 }
  61         }
  62         schedule_delayed_work(&cli_data->work, 0);
  63         return 0;
  64 }
  65
  66 void amd_sfh_work(struct work_struct *work)
  67 {
  68         struct amdtp_cl_data *cli_data = container_of(work, struct amdtp_cl_data, work.work);
  69         struct request_list *req_list = &cli_data->req_list;
  70         struct amd_input_data *in_data = cli_data->in_data;
  71         struct request_list *req_node;
  72         u8 current_index, sensor_index;
  73         struct amd_mp2_ops *mp2_ops;
  74         struct amd_mp2_dev *mp2;
  75         u8 report_id, node_type;
  76         u8 report_size = 0;
  77
  78         req_node = list_last_entry(&req_list->list, struct request_list, list);
  79         list_del(&req_node->list);
  80         current_index = req_node->current_index;
  81         sensor_index = req_node->sensor_idx;
  82         report_id = req_node->report_id;
  83         node_type = req_node->report_type;
  84         kfree(req_node);
  85
  86         mp2 = container_of(in_data, struct amd_mp2_dev, in_data);
  87         mp2_ops = mp2->mp2_ops;
  88         if (node_type == HID_FEATURE_REPORT) {
  89                 report_size = mp2_ops->get_feat_rep(sensor_index, report_id,
  90                                                     cli_data->feature_report[current_index]);
  91                 if (report_size)
  92                         hid_input_report(cli_data->hid_sensor_hubs[current_index],
  93                                          cli_data->report_type[current_index],
  94                                          cli_data->feature_report[current_index], report_size, 0);
  95                 else
  96                         pr_err("AMDSFH: Invalid report size\n");
  97
  98         } else if (node_type == HID_INPUT_REPORT) {
  99                 report_size = mp2_ops->get_in_rep(current_index, sensor_index, report_id, in_data);
 100                 if (report_size)
 101                         hid_input_report(cli_data->hid_sensor_hubs[current_index],
 102                                          cli_data->report_type[current_index],
 103                                          in_data->input_report[current_index], report_size, 0);
 104                 else
 105                         pr_err("AMDSFH: Invalid report size\n");
 106         }
 107         cli_data->cur_hid_dev = current_index;
 108         cli_data->sensor_requested_cnt[current_index] = 0;
 109         amdtp_hid_wakeup(cli_data->hid_sensor_hubs[current_index]);
 110 }
 111
 112 void amd_sfh_work_buffer(struct work_struct *work)
 113 {
 114         struct amdtp_cl_data *cli_data = container_of(work, struct amdtp_cl_data, work_buffer.work);
 115         struct amd_input_data *in_data = cli_data->in_data;
 116         struct amd_mp2_dev *mp2;
 117         u8 report_size;
 118         int i;
 119
 120         for (i = 0; i < cli_data->num_hid_devices; i++) {
 121                 if (cli_data->sensor_sts[i] == SENSOR_ENABLED) {
 122                         mp2 = container_of(in_data, struct amd_mp2_dev, in_data);
 123                         report_size = mp2->mp2_ops->get_in_rep(i, cli_data->sensor_idx[i],
 124                                                                cli_data->report_id[i], in_data);
 125                         hid_input_report(cli_data->hid_sensor_hubs[i], HID_INPUT_REPORT,
 126                                          in_data->input_report[i], report_size, 0);
 127                 }
 128         }
 129         schedule_delayed_work(&cli_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
 130 }
 131
 132 static u32 amd_sfh_wait_for_response(struct amd_mp2_dev *mp2, u8 sid, u32 sensor_sts)
 133 {
 134         if (mp2->mp2_ops->response)
 135                 sensor_sts = mp2->mp2_ops->response(mp2, sid, sensor_sts);
 136
 137         return sensor_sts;
 138 }
 139
 140 static const char *get_sensor_name(int idx)
 141 {
 142         switch (idx) {
 143         case accel_idx:
 144                 return "accelerometer";
 145         case gyro_idx:
 146                 return "gyroscope";
 147         case mag_idx:
 148                 return "magnetometer";
 149         case als_idx:
 150         case ACS_IDX: /* ambient color sensor */
 151                 return "ALS";
 152         case HPD_IDX:
 153                 return "HPD";
 154         default:
 155                 return "unknown sensor type";
 156         }
 157 }
 158
 159 static void amd_sfh_resume(struct amd_mp2_dev *mp2)
 160 {
 161         struct amdtp_cl_data *cl_data = mp2->cl_data;
 162         struct amd_mp2_sensor_info info;
 163         int i, status;
 164
 165         for (i = 0; i < cl_data->num_hid_devices; i++) {
 166                 if (cl_data->sensor_sts[i] == SENSOR_DISABLED) {
 167                         info.period = AMD_SFH_IDLE_LOOP;
 168                         info.sensor_idx = cl_data->sensor_idx[i];
 169                         info.dma_address = cl_data->sensor_dma_addr[i];
 170                         mp2->mp2_ops->start(mp2, info);
 171                         status = amd_sfh_wait_for_response
 172                                         (mp2, cl_data->sensor_idx[i], SENSOR_ENABLED);
 173                         if (status == SENSOR_ENABLED)
 174                                 cl_data->sensor_sts[i] = SENSOR_ENABLED;
 175                         dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n",
 176                                 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
 177                                 cl_data->sensor_sts[i]);
 178                 }
 179         }
 180
 181         schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
 182         amd_sfh_clear_intr(mp2);
 183 }
 184
 185 static void amd_sfh_suspend(struct amd_mp2_dev *mp2)
 186 {
 187         struct amdtp_cl_data *cl_data = mp2->cl_data;
 188         int i, status;
 189
 190         for (i = 0; i < cl_data->num_hid_devices; i++) {
 191                 if (cl_data->sensor_idx[i] != HPD_IDX &&
 192                     cl_data->sensor_sts[i] == SENSOR_ENABLED) {
 193                         mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
 194                         status = amd_sfh_wait_for_response
 195                                         (mp2, cl_data->sensor_idx[i], SENSOR_DISABLED);
 196                         if (status != SENSOR_ENABLED)
 197                                 cl_data->sensor_sts[i] = SENSOR_DISABLED;
 198                         dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n",
 199                                 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
 200                                 cl_data->sensor_sts[i]);
 201                 }
 202         }
 203
 204         cancel_delayed_work_sync(&cl_data->work_buffer);
 205         amd_sfh_clear_intr(mp2);
 206 }
 207
 208 int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
 209 {
 210         struct amd_input_data *in_data = &privdata->in_data;
 211         struct amdtp_cl_data *cl_data = privdata->cl_data;
 212         struct amd_mp2_ops *mp2_ops = privdata->mp2_ops;
 213         struct amd_mp2_sensor_info info;
 214         struct request_list *req_list;
 215         struct device *dev;
 216         u32 feature_report_size;
 217         u32 input_report_size;
 218         int rc, i;
 219         u8 cl_idx;
 220
 221         req_list = &cl_data->req_list;
 222         dev = &privdata->pdev->dev;
 223         amd_sfh_set_desc_ops(mp2_ops);
 224
 225         mp2_ops->suspend = amd_sfh_suspend;
 226         mp2_ops->resume = amd_sfh_resume;
 227
 228         cl_data->num_hid_devices = amd_mp2_get_sensor_num(privdata, &cl_data->sensor_idx[0]);
 229         if (cl_data->num_hid_devices == 0)
 230                 return -ENODEV;
 231         cl_data->is_any_sensor_enabled = false;
 232
 233         INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work);
 234         INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer);
 235         INIT_LIST_HEAD(&req_list->list);
 236         cl_data->in_data = in_data;
 237
 238         for (i = 0; i < cl_data->num_hid_devices; i++) {
 239                 in_data->sensor_virt_addr[i] = dma_alloc_coherent(dev, sizeof(int) * 8,
 240                                                                   &cl_data->sensor_dma_addr[i],
 241                                                                   GFP_KERNEL);
 242                 if (!in_data->sensor_virt_addr[i]) {
 243                         rc = -ENOMEM;
 244                         goto cleanup;
 245                 }
 246                 cl_data->sensor_sts[i] = SENSOR_DISABLED;
 247                 cl_data->sensor_requested_cnt[i] = 0;
 248                 cl_data->cur_hid_dev = i;
 249                 cl_idx = cl_data->sensor_idx[i];
 250                 cl_data->report_descr_sz[i] = mp2_ops->get_desc_sz(cl_idx, descr_size);
 251                 if (!cl_data->report_descr_sz[i]) {
 252                         rc = -EINVAL;
 253                         goto cleanup;
 254                 }
 255                 feature_report_size = mp2_ops->get_desc_sz(cl_idx, feature_size);
 256                 if (!feature_report_size) {
 257                         rc = -EINVAL;
 258                         goto cleanup;
 259                 }
 260                 input_report_size =  mp2_ops->get_desc_sz(cl_idx, input_size);
 261                 if (!input_report_size) {
 262                         rc = -EINVAL;
 263                         goto cleanup;
 264                 }
 265                 cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL);
 266                 if (!cl_data->feature_report[i]) {
 267                         rc = -ENOMEM;
 268                         goto cleanup;
 269                 }
 270                 in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL);
 271                 if (!in_data->input_report[i]) {
 272                         rc = -ENOMEM;
 273                         goto cleanup;
 274                 }
 275                 info.period = AMD_SFH_IDLE_LOOP;
 276                 info.sensor_idx = cl_idx;
 277                 info.dma_address = cl_data->sensor_dma_addr[i];
 278
 279                 cl_data->report_descr[i] =
 280                         devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL);
 281                 if (!cl_data->report_descr[i]) {
 282                         rc = -ENOMEM;
 283                         goto cleanup;
 284                 }
 285                 rc = mp2_ops->get_rep_desc(cl_idx, cl_data->report_descr[i]);
 286                 if (rc)
 287                         goto cleanup;
 288                 mp2_ops->start(privdata, info);
 289                 cl_data->sensor_sts[i] = amd_sfh_wait_for_response
 290                                                 (privdata, cl_data->sensor_idx[i], SENSOR_ENABLED);
 291         }
 292
 293         for (i = 0; i < cl_data->num_hid_devices; i++) {
 294                 cl_data->cur_hid_dev = i;
 295                 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
 296                         cl_data->is_any_sensor_enabled = true;
 297                         rc = amdtp_hid_probe(i, cl_data);
 298                         if (rc)
 299                                 goto cleanup;
 300                 } else {
 301                         cl_data->sensor_sts[i] = SENSOR_DISABLED;
 302                 }
 303                 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
 304                         cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
 305                         cl_data->sensor_sts[i]);
 306         }
 307
 308         if (!cl_data->is_any_sensor_enabled ||
 309            (mp2_ops->discovery_status && mp2_ops->discovery_status(privdata) == 0)) {
 310                 dev_warn(dev, "Failed to discover, sensors not enabled is %d\n", cl_data->is_any_sensor_enabled);
 311                 rc = -EOPNOTSUPP;
 312                 goto cleanup;
 313         }
 314         schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
 315         return 0;
 316
 317 cleanup:
 318         amd_sfh_hid_client_deinit(privdata);
 319         for (i = 0; i < cl_data->num_hid_devices; i++) {
 320                 devm_kfree(dev, cl_data->feature_report[i]);
 321                 devm_kfree(dev, in_data->input_report[i]);
 322                 devm_kfree(dev, cl_data->report_descr[i]);
 323         }
 324         return rc;
 325 }
 326
 327 int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata)
 328 {
 329         struct amdtp_cl_data *cl_data = privdata->cl_data;
 330         struct amd_input_data *in_data = cl_data->in_data;
 331         int i, status;
 332
 333         for (i = 0; i < cl_data->num_hid_devices; i++) {
 334                 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
 335                         privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
 336                         status = amd_sfh_wait_for_response
 337                                         (privdata, cl_data->sensor_idx[i], SENSOR_DISABLED);
 338                         if (status != SENSOR_ENABLED)
 339                                 cl_data->sensor_sts[i] = SENSOR_DISABLED;
 340                         dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x (%s) status 0x%x\n",
 341                                 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
 342                                 cl_data->sensor_sts[i]);
 343                 }
 344         }
 345
 346         cancel_delayed_work_sync(&cl_data->work);
 347         cancel_delayed_work_sync(&cl_data->work_buffer);
 348         amdtp_hid_remove(cl_data);
 349
 350         for (i = 0; i < cl_data->num_hid_devices; i++) {
 351                 if (in_data->sensor_virt_addr[i]) {
 352                         dma_free_coherent(&privdata->pdev->dev, 8 * sizeof(int),
 353                                           in_data->sensor_virt_addr[i],
 354                                           cl_data->sensor_dma_addr[i]);
 355                 }
 356         }
 357         return 0;
 358 }