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 SRA_IDX: 34 case ALS_IDX: 35 case HPD_IDX: 36 if (BIT(i) & slist->sl.sensors) 37 sensor_id[num_of_sensors++] = i; 38 break; 39 } 40 } 41 42 return num_of_sensors; 43 } 44 45 static u32 amd_sfh_wait_for_response(struct amd_mp2_dev *mp2, u8 sid, u32 cmd_id) 46 { 47 if (mp2->mp2_ops->response) 48 return mp2->mp2_ops->response(mp2, sid, cmd_id); 49 50 return 0; 51 } 52 53 static const char *get_sensor_name(int idx) 54 { 55 switch (idx) { 56 case ACCEL_IDX: 57 return "accelerometer"; 58 case GYRO_IDX: 59 return "gyroscope"; 60 case MAG_IDX: 61 return "magnetometer"; 62 case SRA_IDX: 63 return "SRA"; 64 case ALS_IDX: 65 return "ALS"; 66 case HPD_IDX: 67 return "HPD"; 68 default: 69 return "unknown sensor type"; 70 } 71 } 72 73 static int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata) 74 { 75 struct amdtp_cl_data *cl_data = privdata->cl_data; 76 int i, status; 77 78 for (i = 0; i < cl_data->num_hid_devices; i++) { 79 switch (cl_data->sensor_idx[i]) { 80 case HPD_IDX: 81 privdata->dev_en.is_hpd_present = false; 82 break; 83 case ALS_IDX: 84 privdata->dev_en.is_als_present = false; 85 break; 86 case SRA_IDX: 87 privdata->dev_en.is_sra_present = false; 88 break; 89 } 90 91 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) { 92 privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]); 93 status = amd_sfh_wait_for_response 94 (privdata, cl_data->sensor_idx[i], DISABLE_SENSOR); 95 if (status == 0) 96 cl_data->sensor_sts[i] = SENSOR_DISABLED; 97 dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x (%s) status 0x%x\n", 98 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 99 cl_data->sensor_sts[i]); 100 } 101 } 102 103 cancel_delayed_work_sync(&cl_data->work); 104 cancel_delayed_work_sync(&cl_data->work_buffer); 105 amdtp_hid_remove(cl_data); 106 107 return 0; 108 } 109 110 static int amd_sfh1_1_hid_client_init(struct amd_mp2_dev *privdata) 111 { 112 struct amd_input_data *in_data = &privdata->in_data; 113 struct amdtp_cl_data *cl_data = privdata->cl_data; 114 struct amd_mp2_ops *mp2_ops = privdata->mp2_ops; 115 struct amd_mp2_sensor_info info; 116 struct request_list *req_list; 117 u32 feature_report_size; 118 u32 input_report_size; 119 struct device *dev; 120 int rc, i, status; 121 u8 cl_idx; 122 123 req_list = &cl_data->req_list; 124 dev = &privdata->pdev->dev; 125 amd_sfh1_1_set_desc_ops(mp2_ops); 126 127 cl_data->num_hid_devices = amd_sfh_get_sensor_num(privdata, &cl_data->sensor_idx[0]); 128 if (cl_data->num_hid_devices == 0) 129 return -ENODEV; 130 cl_data->is_any_sensor_enabled = false; 131 132 INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work); 133 INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer); 134 INIT_LIST_HEAD(&req_list->list); 135 cl_data->in_data = in_data; 136 137 for (i = 0; i < cl_data->num_hid_devices; i++) { 138 cl_data->sensor_sts[i] = SENSOR_DISABLED; 139 140 if (cl_data->sensor_idx[i] == SRA_IDX) { 141 info.sensor_idx = cl_data->sensor_idx[i]; 142 writel(0, privdata->mmio + amd_get_p2c_val(privdata, 0)); 143 mp2_ops->start(privdata, info); 144 status = amd_sfh_wait_for_response 145 (privdata, cl_data->sensor_idx[i], ENABLE_SENSOR); 146 147 cl_data->sensor_sts[i] = (status == 0) ? SENSOR_ENABLED : SENSOR_DISABLED; 148 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) { 149 cl_data->is_any_sensor_enabled = true; 150 privdata->dev_en.is_sra_present = true; 151 } 152 continue; 153 } 154 155 cl_data->sensor_requested_cnt[i] = 0; 156 cl_data->cur_hid_dev = i; 157 cl_idx = cl_data->sensor_idx[i]; 158 159 cl_data->report_descr_sz[i] = mp2_ops->get_desc_sz(cl_idx, descr_size); 160 if (!cl_data->report_descr_sz[i]) { 161 rc = -EINVAL; 162 goto cleanup; 163 } 164 feature_report_size = mp2_ops->get_desc_sz(cl_idx, feature_size); 165 if (!feature_report_size) { 166 rc = -EINVAL; 167 goto cleanup; 168 } 169 input_report_size = mp2_ops->get_desc_sz(cl_idx, input_size); 170 if (!input_report_size) { 171 rc = -EINVAL; 172 goto cleanup; 173 } 174 cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL); 175 if (!cl_data->feature_report[i]) { 176 rc = -ENOMEM; 177 goto cleanup; 178 } 179 in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL); 180 if (!in_data->input_report[i]) { 181 rc = -ENOMEM; 182 goto cleanup; 183 } 184 185 info.sensor_idx = cl_idx; 186 187 cl_data->report_descr[i] = 188 devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL); 189 if (!cl_data->report_descr[i]) { 190 rc = -ENOMEM; 191 goto cleanup; 192 } 193 rc = mp2_ops->get_rep_desc(cl_idx, cl_data->report_descr[i]); 194 if (rc) 195 goto cleanup; 196 197 mp2_ops->stop(privdata, cl_data->sensor_idx[i]); 198 amd_sfh_wait_for_response(privdata, cl_data->sensor_idx[i], DISABLE_SENSOR); 199 writel(0, privdata->mmio + amd_get_p2c_val(privdata, 0)); 200 mp2_ops->start(privdata, info); 201 status = amd_sfh_wait_for_response 202 (privdata, cl_data->sensor_idx[i], ENABLE_SENSOR); 203 204 cl_data->sensor_sts[i] = (status == 0) ? SENSOR_ENABLED : SENSOR_DISABLED; 205 } 206 207 for (i = 0; i < cl_data->num_hid_devices; i++) { 208 if (cl_data->sensor_idx[i] == SRA_IDX) 209 continue; 210 cl_data->cur_hid_dev = i; 211 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) { 212 cl_data->is_any_sensor_enabled = true; 213 rc = amdtp_hid_probe(i, cl_data); 214 if (rc) 215 goto cleanup; 216 switch (cl_data->sensor_idx[i]) { 217 case HPD_IDX: 218 privdata->dev_en.is_hpd_present = true; 219 privdata->dev_en.is_hpd_enabled = true; 220 amd_sfh_toggle_hpd(privdata, false); 221 break; 222 case ALS_IDX: 223 privdata->dev_en.is_als_present = true; 224 break; 225 } 226 } 227 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n", 228 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 229 cl_data->sensor_sts[i]); 230 } 231 232 if (!cl_data->is_any_sensor_enabled) { 233 dev_warn(dev, "No sensor registered, sensors not enabled is %d\n", 234 cl_data->is_any_sensor_enabled); 235 rc = -EOPNOTSUPP; 236 goto cleanup; 237 } 238 239 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP)); 240 return 0; 241 242 cleanup: 243 amd_sfh_hid_client_deinit(privdata); 244 for (i = 0; i < cl_data->num_hid_devices; i++) { 245 if (cl_data->sensor_idx[i] == SRA_IDX) 246 continue; 247 devm_kfree(dev, cl_data->feature_report[i]); 248 devm_kfree(dev, in_data->input_report[i]); 249 devm_kfree(dev, cl_data->report_descr[i]); 250 } 251 return rc; 252 } 253 254 static void amd_sfh_resume(struct amd_mp2_dev *mp2) 255 { 256 struct amdtp_cl_data *cl_data = mp2->cl_data; 257 struct amd_mp2_sensor_info info; 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 /* leave HPD alone; policy is controlled by sysfs */ 267 if (cl_data->sensor_idx[i] == HPD_IDX) 268 continue; 269 270 if (cl_data->sensor_sts[i] == SENSOR_DISABLED) { 271 info.sensor_idx = cl_data->sensor_idx[i]; 272 mp2->mp2_ops->start(mp2, info); 273 status = amd_sfh_wait_for_response 274 (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR); 275 if (status == 0) 276 status = SENSOR_ENABLED; 277 if (status == SENSOR_ENABLED) 278 cl_data->sensor_sts[i] = SENSOR_ENABLED; 279 dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n", 280 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 281 cl_data->sensor_sts[i]); 282 } 283 } 284 285 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP)); 286 amd_sfh_clear_intr(mp2); 287 } 288 289 static void amd_sfh_suspend(struct amd_mp2_dev *mp2) 290 { 291 struct amdtp_cl_data *cl_data = mp2->cl_data; 292 int i, status; 293 294 if (!cl_data->is_any_sensor_enabled) { 295 amd_sfh_clear_intr(mp2); 296 return; 297 } 298 299 for (i = 0; i < cl_data->num_hid_devices; i++) { 300 /* leave HPD alone; policy is controlled by sysfs */ 301 if (cl_data->sensor_idx[i] == HPD_IDX) 302 continue; 303 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) { 304 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]); 305 status = amd_sfh_wait_for_response 306 (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR); 307 if (status == 0) 308 status = SENSOR_DISABLED; 309 if (status != SENSOR_ENABLED) 310 cl_data->sensor_sts[i] = SENSOR_DISABLED; 311 dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n", 312 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 313 cl_data->sensor_sts[i]); 314 } 315 } 316 317 cancel_delayed_work_sync(&cl_data->work_buffer); 318 amd_sfh_clear_intr(mp2); 319 } 320 321 void amd_sfh_toggle_hpd(struct amd_mp2_dev *mp2, bool enabled) 322 { 323 struct amdtp_cl_data *cl_data = mp2->cl_data; 324 struct amd_mp2_sensor_info info; 325 int i, status; 326 327 if (mp2->dev_en.is_hpd_enabled == enabled) 328 return; 329 330 for (i = 0; i < cl_data->num_hid_devices; i++) { 331 if (cl_data->sensor_idx[i] != HPD_IDX) 332 continue; 333 info.sensor_idx = cl_data->sensor_idx[i]; 334 if (enabled) { 335 mp2->mp2_ops->start(mp2, info); 336 status = amd_sfh_wait_for_response 337 (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR); 338 if (status == 0) 339 status = SENSOR_ENABLED; 340 if (status == SENSOR_ENABLED) 341 cl_data->sensor_sts[i] = SENSOR_ENABLED; 342 } else { 343 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]); 344 status = amd_sfh_wait_for_response 345 (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR); 346 if (status == 0) 347 status = SENSOR_DISABLED; 348 if (status != SENSOR_ENABLED) 349 cl_data->sensor_sts[i] = SENSOR_DISABLED; 350 } 351 dev_dbg(&mp2->pdev->dev, "toggle sid 0x%x (%s) status 0x%x\n", 352 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 353 cl_data->sensor_sts[i]); 354 break; 355 } 356 mp2->dev_en.is_hpd_enabled = enabled; 357 } 358 359 static void amd_mp2_pci_remove(void *privdata) 360 { 361 struct amd_mp2_dev *mp2 = privdata; 362 363 sfh_deinit_emp2(); 364 amd_sfh_hid_client_deinit(privdata); 365 mp2->mp2_ops->stop_all(mp2); 366 pcim_intx(mp2->pdev, false); 367 amd_sfh_clear_intr(mp2); 368 } 369 370 static void amd_sfh_set_ops(struct amd_mp2_dev *mp2) 371 { 372 struct amd_mp2_ops *mp2_ops; 373 374 sfh_interface_init(mp2); 375 mp2_ops = mp2->mp2_ops; 376 mp2_ops->clear_intr = amd_sfh_clear_intr_v2; 377 mp2_ops->init_intr = amd_sfh_irq_init_v2; 378 mp2_ops->suspend = amd_sfh_suspend; 379 mp2_ops->resume = amd_sfh_resume; 380 mp2_ops->remove = amd_mp2_pci_remove; 381 } 382 383 int amd_sfh1_1_init(struct amd_mp2_dev *mp2) 384 { 385 u32 phy_base = readl(mp2->mmio + amd_get_c2p_val(mp2, 22)); 386 struct device *dev = &mp2->pdev->dev; 387 struct sfh_base_info binfo; 388 int rc; 389 390 phy_base <<= 21; 391 if (!devm_request_mem_region(dev, phy_base, 128 * 1024, "amd_sfh")) { 392 dev_dbg(dev, "can't reserve mmio registers\n"); 393 return -ENOMEM; 394 } 395 396 mp2->vsbase = devm_ioremap(dev, phy_base, 128 * 1024); 397 if (!mp2->vsbase) { 398 dev_dbg(dev, "failed to remap vsbase\n"); 399 return -ENOMEM; 400 } 401 402 /* Before accessing give time for SFH firmware for processing configuration */ 403 msleep(5000); 404 405 memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info)); 406 if (binfo.sbase.fw_info.fw_ver == 0 || binfo.sbase.s_list.sl.sensors == 0) { 407 dev_dbg(dev, "No sensor registered\n"); 408 return -EOPNOTSUPP; 409 } 410 dev_dbg(dev, "firmware version 0x%x\n", binfo.sbase.fw_info.fw_ver); 411 412 amd_sfh_set_ops(mp2); 413 414 rc = amd_sfh_irq_init(mp2); 415 if (rc) { 416 sfh_deinit_emp2(); 417 dev_err(dev, "amd_sfh_irq_init failed\n"); 418 return rc; 419 } 420 421 rc = amd_sfh1_1_hid_client_init(mp2); 422 if (rc) { 423 sfh_deinit_emp2(); 424 if ((rc != -ENODEV) && (rc != -EOPNOTSUPP)) 425 dev_err(dev, "amd_sfh1_1_hid_client_init failed\n"); 426 return rc; 427 } 428 429 return rc; 430 } 431