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 Advanced Micro Devices, Inc.
   5  *  Authors: Nehal Bakulchandra Shah <Nehal-Bakulchandra.Shah@amd.com>
   6  *           Sandeep Singh <Sandeep.singh@amd.com>
   7  */
   8
   9 #include <linux/dma-mapping.h>
  10 #include <linux/hid.h>
  11 #include <linux/list.h>
  12 #include <linux/slab.h>
  13 #include <linux/workqueue.h>
  14 #include <linux/errno.h>
  15
  16 #include "hid_descriptor/amd_sfh_hid_desc.h"
  17 #include "amd_sfh_pcie.h"
  18 #include "amd_sfh_hid.h"
  19
  20 #define AMD_SFH_IDLE_LOOP       200
  21
  22 struct request_list {
  23         struct hid_device *hid;
  24         struct list_head list;
  25         u8 report_id;
  26         u8 sensor_idx;
  27         u8 report_type;
  28         u8 current_index;
  29 };
  30
  31 static struct request_list req_list;
  32
  33 void amd_sfh_set_report(struct hid_device *hid, int report_id,
  34                         int report_type)
  35 {
  36         struct amdtp_hid_data *hid_data = hid->driver_data;
  37         struct amdtp_cl_data *cli_data = hid_data->cli_data;
  38         int i;
  39
  40         for (i = 0; i < cli_data->num_hid_devices; i++) {
  41                 if (cli_data->hid_sensor_hubs[i] == hid) {
  42                         cli_data->cur_hid_dev = i;
  43                         break;
  44                 }
  45         }
  46         amdtp_hid_wakeup(hid);
  47 }
  48
  49 int amd_sfh_get_report(struct hid_device *hid, int report_id, int report_type)
  50 {
  51         struct amdtp_hid_data *hid_data = hid->driver_data;
  52         struct amdtp_cl_data *cli_data = hid_data->cli_data;
  53         int i;
  54
  55         for (i = 0; i < cli_data->num_hid_devices; i++) {
  56                 if (cli_data->hid_sensor_hubs[i] == hid) {
  57                         struct request_list *new = kzalloc(sizeof(*new), GFP_KERNEL);
  58
  59                         if (!new)
  60                                 return -ENOMEM;
  61
  62                         new->current_index = i;
  63                         new->sensor_idx = cli_data->sensor_idx[i];
  64                         new->hid = hid;
  65                         new->report_type = report_type;
  66                         new->report_id = report_id;
  67                         cli_data->report_id[i] = report_id;
  68                         cli_data->request_done[i] = false;
  69                         list_add(&new->list, &req_list.list);
  70                         break;
  71                 }
  72         }
  73         schedule_delayed_work(&cli_data->work, 0);
  74         return 0;
  75 }
  76
  77 static void amd_sfh_work(struct work_struct *work)
  78 {
  79         struct amdtp_cl_data *cli_data = container_of(work, struct amdtp_cl_data, work.work);
  80         struct request_list *req_node;
  81         u8 current_index, sensor_index;
  82         u8 report_id, node_type;
  83         u8 report_size = 0;
  84
  85         req_node = list_last_entry(&req_list.list, struct request_list, list);
  86         list_del(&req_node->list);
  87         current_index = req_node->current_index;
  88         sensor_index = req_node->sensor_idx;
  89         report_id = req_node->report_id;
  90         node_type = req_node->report_type;
  91         kfree(req_node);
  92
  93         if (node_type == HID_FEATURE_REPORT) {
  94                 report_size = get_feature_report(sensor_index, report_id,
  95                                                  cli_data->feature_report[current_index]);
  96                 if (report_size)
  97                         hid_input_report(cli_data->hid_sensor_hubs[current_index],
  98                                          cli_data->report_type[current_index],
  99                                          cli_data->feature_report[current_index], report_size, 0);
 100                 else
 101                         pr_err("AMDSFH: Invalid report size\n");
 102
 103         } else if (node_type == HID_INPUT_REPORT) {
 104                 report_size = get_input_report(sensor_index, report_id,
 105                                                cli_data->input_report[current_index],
 106                                                cli_data->sensor_virt_addr[current_index]);
 107                 if (report_size)
 108                         hid_input_report(cli_data->hid_sensor_hubs[current_index],
 109                                          cli_data->report_type[current_index],
 110                                          cli_data->input_report[current_index], report_size, 0);
 111                 else
 112                         pr_err("AMDSFH: Invalid report size\n");
 113         }
 114         cli_data->cur_hid_dev = current_index;
 115         cli_data->sensor_requested_cnt[current_index] = 0;
 116         amdtp_hid_wakeup(cli_data->hid_sensor_hubs[current_index]);
 117 }
 118
 119 static void amd_sfh_work_buffer(struct work_struct *work)
 120 {
 121         struct amdtp_cl_data *cli_data = container_of(work, struct amdtp_cl_data, work_buffer.work);
 122         u8 report_size;
 123         int i;
 124
 125         for (i = 0; i < cli_data->num_hid_devices; i++) {
 126                 report_size = get_input_report(cli_data->sensor_idx[i], cli_data->report_id[i],
 127                                                cli_data->input_report[i],
 128                                                cli_data->sensor_virt_addr[i]);
 129                 hid_input_report(cli_data->hid_sensor_hubs[i], HID_INPUT_REPORT,
 130                                  cli_data->input_report[i], report_size, 0);
 131         }
 132         schedule_delayed_work(&cli_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
 133 }
 134
 135 int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
 136 {
 137         struct amdtp_cl_data *cl_data = privdata->cl_data;
 138         struct amd_mp2_sensor_info info;
 139         struct device *dev;
 140         u32 feature_report_size;
 141         u32 input_report_size;
 142         u8 cl_idx;
 143         int rc, i;
 144
 145         dev = &privdata->pdev->dev;
 146         cl_data = devm_kzalloc(dev, sizeof(*cl_data), GFP_KERNEL);
 147         if (!cl_data)
 148                 return -ENOMEM;
 149
 150         cl_data->num_hid_devices = amd_mp2_get_sensor_num(privdata, &cl_data->sensor_idx[0]);
 151
 152         INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work);
 153         INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer);
 154         INIT_LIST_HEAD(&req_list.list);
 155
 156         for (i = 0; i < cl_data->num_hid_devices; i++) {
 157                 cl_data->sensor_virt_addr[i] = dma_alloc_coherent(dev, sizeof(int) * 8,
 158                                                                   &cl_data->sensor_dma_addr[i],
 159                                                                   GFP_KERNEL);
 160                 cl_data->sensor_sts[i] = 0;
 161                 cl_data->sensor_requested_cnt[i] = 0;
 162                 cl_data->cur_hid_dev = i;
 163                 cl_idx = cl_data->sensor_idx[i];
 164                 cl_data->report_descr_sz[i] = get_descr_sz(cl_idx, descr_size);
 165                 if (!cl_data->report_descr_sz[i]) {
 166                         rc = -EINVAL;
 167                         goto cleanup;
 168                 }
 169                 feature_report_size = get_descr_sz(cl_idx, feature_size);
 170                 if (!feature_report_size) {
 171                         rc = -EINVAL;
 172                         goto cleanup;
 173                 }
 174                 input_report_size =  get_descr_sz(cl_idx, input_size);
 175                 if (!input_report_size) {
 176                         rc = -EINVAL;
 177                         goto cleanup;
 178                 }
 179                 cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL);
 180                 if (!cl_data->feature_report[i]) {
 181                         rc = -ENOMEM;
 182                         goto cleanup;
 183                 }
 184                 cl_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL);
 185                 if (!cl_data->input_report[i]) {
 186                         rc = -ENOMEM;
 187                         goto cleanup;
 188                 }
 189                 info.period = msecs_to_jiffies(AMD_SFH_IDLE_LOOP);
 190                 info.sensor_idx = cl_idx;
 191                 info.dma_address = cl_data->sensor_dma_addr[i];
 192
 193                 cl_data->report_descr[i] =
 194                         devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL);
 195                 if (!cl_data->report_descr[i]) {
 196                         rc = -ENOMEM;
 197                         goto cleanup;
 198                 }
 199                 rc = get_report_descriptor(cl_idx, cl_data->report_descr[i]);
 200                 if (rc)
 201                         return rc;
 202                 rc = amdtp_hid_probe(cl_data->cur_hid_dev, cl_data);
 203                 if (rc)
 204                         return rc;
 205                 amd_start_sensor(privdata, info);
 206                 cl_data->sensor_sts[i] = 1;
 207         }
 208         privdata->cl_data = cl_data;
 209         schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
 210         return 0;
 211
 212 cleanup:
 213         for (i = 0; i < cl_data->num_hid_devices; i++) {
 214                 if (cl_data->sensor_virt_addr[i]) {
 215                         dma_free_coherent(&privdata->pdev->dev, 8 * sizeof(int),
 216                                           cl_data->sensor_virt_addr[i],
 217                                           cl_data->sensor_dma_addr[i]);
 218                 }
 219                 devm_kfree(dev, cl_data->feature_report[i]);
 220                 devm_kfree(dev, cl_data->input_report[i]);
 221                 devm_kfree(dev, cl_data->report_descr[i]);
 222         }
 223         devm_kfree(dev, cl_data);
 224         return rc;
 225 }
 226
 227 int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata)
 228 {
 229         struct amdtp_cl_data *cl_data = privdata->cl_data;
 230         int i;
 231
 232         for (i = 0; i < cl_data->num_hid_devices; i++)
 233                 amd_stop_sensor(privdata, i);
 234
 235         cancel_delayed_work_sync(&cl_data->work);
 236         cancel_delayed_work_sync(&cl_data->work_buffer);
 237         amdtp_hid_remove(cl_data);
 238
 239         for (i = 0; i < cl_data->num_hid_devices; i++) {
 240                 if (cl_data->sensor_virt_addr[i]) {
 241                         dma_free_coherent(&privdata->pdev->dev, 8 * sizeof(int),
 242                                           cl_data->sensor_virt_addr[i],
 243                                           cl_data->sensor_dma_addr[i]);
 244                 }
 245         }
 246         return 0;
 247 }