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                 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
  77                         privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
  78                         status = amd_sfh_wait_for_response
  79                                         (privdata, cl_data->sensor_idx[i], DISABLE_SENSOR);
  80                         if (status == 0)
  81                                 cl_data->sensor_sts[i] = SENSOR_DISABLED;
  82                         dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x (%s) status 0x%x\n",
  83                                 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
  84                                 cl_data->sensor_sts[i]);
  85                 }
  86         }
  87
  88         cancel_delayed_work_sync(&cl_data->work);
  89         cancel_delayed_work_sync(&cl_data->work_buffer);
  90         amdtp_hid_remove(cl_data);
  91
  92         return 0;
  93 }
  94
  95 static int amd_sfh1_1_hid_client_init(struct amd_mp2_dev *privdata)
  96 {
  97         struct amd_input_data *in_data = &privdata->in_data;
  98         struct amdtp_cl_data *cl_data = privdata->cl_data;
  99         struct amd_mp2_ops *mp2_ops = privdata->mp2_ops;
 100         struct amd_mp2_sensor_info info;
 101         struct request_list *req_list;
 102         u32 feature_report_size;
 103         u32 input_report_size;
 104         struct device *dev;
 105         int rc, i, status;
 106         u8 cl_idx;
 107
 108         req_list = &cl_data->req_list;
 109         dev = &privdata->pdev->dev;
 110         amd_sfh1_1_set_desc_ops(mp2_ops);
 111
 112         cl_data->num_hid_devices = amd_sfh_get_sensor_num(privdata, &cl_data->sensor_idx[0]);
 113         if (cl_data->num_hid_devices == 0)
 114                 return -ENODEV;
 115         cl_data->is_any_sensor_enabled = false;
 116
 117         INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work);
 118         INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer);
 119         INIT_LIST_HEAD(&req_list->list);
 120         cl_data->in_data = in_data;
 121
 122         for (i = 0; i < cl_data->num_hid_devices; i++) {
 123                 cl_data->sensor_sts[i] = SENSOR_DISABLED;
 124                 cl_data->sensor_requested_cnt[i] = 0;
 125                 cl_data->cur_hid_dev = i;
 126                 cl_idx = cl_data->sensor_idx[i];
 127
 128                 cl_data->report_descr_sz[i] = mp2_ops->get_desc_sz(cl_idx, descr_size);
 129                 if (!cl_data->report_descr_sz[i]) {
 130                         rc = -EINVAL;
 131                         goto cleanup;
 132                 }
 133                 feature_report_size = mp2_ops->get_desc_sz(cl_idx, feature_size);
 134                 if (!feature_report_size) {
 135                         rc = -EINVAL;
 136                         goto cleanup;
 137                 }
 138                 input_report_size =  mp2_ops->get_desc_sz(cl_idx, input_size);
 139                 if (!input_report_size) {
 140                         rc = -EINVAL;
 141                         goto cleanup;
 142                 }
 143                 cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL);
 144                 if (!cl_data->feature_report[i]) {
 145                         rc = -ENOMEM;
 146                         goto cleanup;
 147                 }
 148                 in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL);
 149                 if (!in_data->input_report[i]) {
 150                         rc = -ENOMEM;
 151                         goto cleanup;
 152                 }
 153
 154                 info.sensor_idx = cl_idx;
 155
 156                 cl_data->report_descr[i] =
 157                         devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL);
 158                 if (!cl_data->report_descr[i]) {
 159                         rc = -ENOMEM;
 160                         goto cleanup;
 161                 }
 162                 rc = mp2_ops->get_rep_desc(cl_idx, cl_data->report_descr[i]);
 163                 if (rc)
 164                         goto cleanup;
 165
 166                 writel(0, privdata->mmio + AMD_P2C_MSG(0));
 167                 mp2_ops->start(privdata, info);
 168                 status = amd_sfh_wait_for_response
 169                                 (privdata, cl_data->sensor_idx[i], ENABLE_SENSOR);
 170
 171                 cl_data->sensor_sts[i] = (status == 0) ? SENSOR_ENABLED : SENSOR_DISABLED;
 172         }
 173
 174         for (i = 0; i < cl_data->num_hid_devices; i++) {
 175                 cl_data->cur_hid_dev = i;
 176                 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
 177                         cl_data->is_any_sensor_enabled = true;
 178                         rc = amdtp_hid_probe(i, cl_data);
 179                         if (rc)
 180                                 goto cleanup;
 181                 }
 182                 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
 183                         cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
 184                         cl_data->sensor_sts[i]);
 185         }
 186
 187         if (!cl_data->is_any_sensor_enabled) {
 188                 dev_warn(dev, "Failed to discover, sensors not enabled is %d\n",
 189                          cl_data->is_any_sensor_enabled);
 190                 rc = -EOPNOTSUPP;
 191                 goto cleanup;
 192         }
 193
 194         schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
 195         return 0;
 196
 197 cleanup:
 198         amd_sfh_hid_client_deinit(privdata);
 199         for (i = 0; i < cl_data->num_hid_devices; i++) {
 200                 devm_kfree(dev, cl_data->feature_report[i]);
 201                 devm_kfree(dev, in_data->input_report[i]);
 202                 devm_kfree(dev, cl_data->report_descr[i]);
 203         }
 204         return rc;
 205 }
 206
 207 static void amd_sfh_resume(struct amd_mp2_dev *mp2)
 208 {
 209         struct amdtp_cl_data *cl_data = mp2->cl_data;
 210         struct amd_mp2_sensor_info info;
 211         int i, status;
 212
 213         for (i = 0; i < cl_data->num_hid_devices; i++) {
 214                 if (cl_data->sensor_sts[i] == SENSOR_DISABLED) {
 215                         info.sensor_idx = cl_data->sensor_idx[i];
 216                         mp2->mp2_ops->start(mp2, info);
 217                         status = amd_sfh_wait_for_response
 218                                         (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR);
 219                         if (status == 0)
 220                                 status = SENSOR_ENABLED;
 221                         if (status == SENSOR_ENABLED)
 222                                 cl_data->sensor_sts[i] = SENSOR_ENABLED;
 223                         dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n",
 224                                 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
 225                                 cl_data->sensor_sts[i]);
 226                 }
 227         }
 228
 229         schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
 230         amd_sfh_clear_intr(mp2);
 231 }
 232
 233 static void amd_sfh_suspend(struct amd_mp2_dev *mp2)
 234 {
 235         struct amdtp_cl_data *cl_data = mp2->cl_data;
 236         int i, status;
 237
 238         for (i = 0; i < cl_data->num_hid_devices; i++) {
 239                 if (cl_data->sensor_idx[i] != HPD_IDX &&
 240                     cl_data->sensor_sts[i] == SENSOR_ENABLED) {
 241                         mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
 242                         status = amd_sfh_wait_for_response
 243                                         (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR);
 244                         if (status == 0)
 245                                 status = SENSOR_DISABLED;
 246                         if (status != SENSOR_ENABLED)
 247                                 cl_data->sensor_sts[i] = SENSOR_DISABLED;
 248                         dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n",
 249                                 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
 250                                 cl_data->sensor_sts[i]);
 251                 }
 252         }
 253
 254         cancel_delayed_work_sync(&cl_data->work_buffer);
 255         amd_sfh_clear_intr(mp2);
 256 }
 257
 258 static void amd_mp2_pci_remove(void *privdata)
 259 {
 260         struct amd_mp2_dev *mp2 = privdata;
 261
 262         amd_sfh_hid_client_deinit(privdata);
 263         mp2->mp2_ops->stop_all(mp2);
 264         pci_intx(mp2->pdev, false);
 265         amd_sfh_clear_intr(mp2);
 266 }
 267
 268 static void amd_sfh_set_ops(struct amd_mp2_dev *mp2)
 269 {
 270         struct amd_mp2_ops *mp2_ops;
 271
 272         sfh_interface_init(mp2);
 273         mp2_ops = mp2->mp2_ops;
 274         mp2_ops->clear_intr = amd_sfh_clear_intr_v2,
 275         mp2_ops->init_intr = amd_sfh_irq_init_v2,
 276         mp2_ops->suspend = amd_sfh_suspend;
 277         mp2_ops->resume = amd_sfh_resume;
 278         mp2_ops->remove = amd_mp2_pci_remove;
 279 }
 280
 281 int amd_sfh1_1_init(struct amd_mp2_dev *mp2)
 282 {
 283         u32 phy_base = readl(mp2->mmio + AMD_C2P_MSG(22));
 284         struct device *dev = &mp2->pdev->dev;
 285         struct sfh_base_info binfo;
 286         int rc;
 287
 288         phy_base <<= 21;
 289         if (!devm_request_mem_region(dev, phy_base, 128 * 1024, "amd_sfh")) {
 290                 dev_dbg(dev, "can't reserve mmio registers\n");
 291                 return -ENOMEM;
 292         }
 293
 294         mp2->vsbase = devm_ioremap(dev, phy_base, 128 * 1024);
 295         if (!mp2->vsbase) {
 296                 dev_dbg(dev, "failed to remap vsbase\n");
 297                 return -ENOMEM;
 298         }
 299
 300         /* Before accessing give time for SFH firmware for processing configuration */
 301         msleep(5000);
 302
 303         memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info));
 304         if (binfo.sbase.fw_info.fw_ver == 0 || binfo.sbase.s_list.sl.sensors == 0) {
 305                 dev_dbg(dev, "failed to get sensors\n");
 306                 return -EOPNOTSUPP;
 307         }
 308         dev_dbg(dev, "firmware version 0x%x\n", binfo.sbase.fw_info.fw_ver);
 309
 310         amd_sfh_set_ops(mp2);
 311
 312         rc = amd_sfh_irq_init(mp2);
 313         if (rc) {
 314                 dev_err(dev, "amd_sfh_irq_init failed\n");
 315                 return rc;
 316         }
 317
 318         rc = amd_sfh1_1_hid_client_init(mp2);
 319         if (rc) {
 320                 dev_err(dev, "amd_sfh1_1_hid_client_init failed\n");
 321                 return rc;
 322         }
 323
 324         return rc;
 325 }