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 writel(0, privdata->mmio + amd_get_p2c_val(privdata, 0)); 198 mp2_ops->start(privdata, info); 199 status = amd_sfh_wait_for_response 200 (privdata, cl_data->sensor_idx[i], ENABLE_SENSOR); 201 202 cl_data->sensor_sts[i] = (status == 0) ? SENSOR_ENABLED : SENSOR_DISABLED; 203 } 204 205 for (i = 0; i < cl_data->num_hid_devices; i++) { 206 if (cl_data->sensor_idx[i] == SRA_IDX) 207 continue; 208 cl_data->cur_hid_dev = i; 209 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) { 210 cl_data->is_any_sensor_enabled = true; 211 rc = amdtp_hid_probe(i, cl_data); 212 if (rc) 213 goto cleanup; 214 switch (cl_data->sensor_idx[i]) { 215 case HPD_IDX: 216 privdata->dev_en.is_hpd_present = true; 217 privdata->dev_en.is_hpd_enabled = true; 218 amd_sfh_toggle_hpd(privdata, false); 219 break; 220 case ALS_IDX: 221 privdata->dev_en.is_als_present = true; 222 break; 223 } 224 } 225 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n", 226 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 227 cl_data->sensor_sts[i]); 228 } 229 230 if (!cl_data->is_any_sensor_enabled) { 231 dev_warn(dev, "No sensor registered, sensors not enabled is %d\n", 232 cl_data->is_any_sensor_enabled); 233 rc = -EOPNOTSUPP; 234 goto cleanup; 235 } 236 237 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP)); 238 return 0; 239 240 cleanup: 241 amd_sfh_hid_client_deinit(privdata); 242 for (i = 0; i < cl_data->num_hid_devices; i++) { 243 if (cl_data->sensor_idx[i] == SRA_IDX) 244 continue; 245 devm_kfree(dev, cl_data->feature_report[i]); 246 devm_kfree(dev, in_data->input_report[i]); 247 devm_kfree(dev, cl_data->report_descr[i]); 248 } 249 return rc; 250 } 251 252 static void amd_sfh_resume(struct amd_mp2_dev *mp2) 253 { 254 struct amdtp_cl_data *cl_data = mp2->cl_data; 255 struct amd_mp2_sensor_info info; 256 int i, status; 257 258 if (!cl_data->is_any_sensor_enabled) { 259 amd_sfh_clear_intr(mp2); 260 return; 261 } 262 263 for (i = 0; i < cl_data->num_hid_devices; i++) { 264 /* leave HPD alone; policy is controlled by sysfs */ 265 if (cl_data->sensor_idx[i] == HPD_IDX) 266 continue; 267 268 if (cl_data->sensor_sts[i] == SENSOR_DISABLED) { 269 info.sensor_idx = cl_data->sensor_idx[i]; 270 mp2->mp2_ops->start(mp2, info); 271 status = amd_sfh_wait_for_response 272 (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR); 273 if (status == 0) 274 status = SENSOR_ENABLED; 275 if (status == SENSOR_ENABLED) 276 cl_data->sensor_sts[i] = SENSOR_ENABLED; 277 dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n", 278 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 279 cl_data->sensor_sts[i]); 280 } 281 } 282 283 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP)); 284 amd_sfh_clear_intr(mp2); 285 } 286 287 static void amd_sfh_suspend(struct amd_mp2_dev *mp2) 288 { 289 struct amdtp_cl_data *cl_data = mp2->cl_data; 290 int i, status; 291 292 if (!cl_data->is_any_sensor_enabled) { 293 amd_sfh_clear_intr(mp2); 294 return; 295 } 296 297 for (i = 0; i < cl_data->num_hid_devices; i++) { 298 /* leave HPD alone; policy is controlled by sysfs */ 299 if (cl_data->sensor_idx[i] == HPD_IDX) 300 continue; 301 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) { 302 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]); 303 status = amd_sfh_wait_for_response 304 (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR); 305 if (status == 0) 306 status = SENSOR_DISABLED; 307 if (status != SENSOR_ENABLED) 308 cl_data->sensor_sts[i] = SENSOR_DISABLED; 309 dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n", 310 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 311 cl_data->sensor_sts[i]); 312 } 313 } 314 315 cancel_delayed_work_sync(&cl_data->work_buffer); 316 amd_sfh_clear_intr(mp2); 317 } 318 319 void amd_sfh_toggle_hpd(struct amd_mp2_dev *mp2, bool enabled) 320 { 321 struct amdtp_cl_data *cl_data = mp2->cl_data; 322 struct amd_mp2_sensor_info info; 323 int i, status; 324 325 if (mp2->dev_en.is_hpd_enabled == enabled) 326 return; 327 328 for (i = 0; i < cl_data->num_hid_devices; i++) { 329 if (cl_data->sensor_idx[i] != HPD_IDX) 330 continue; 331 info.sensor_idx = cl_data->sensor_idx[i]; 332 if (enabled) { 333 mp2->mp2_ops->start(mp2, info); 334 status = amd_sfh_wait_for_response 335 (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR); 336 if (status == 0) 337 status = SENSOR_ENABLED; 338 if (status == SENSOR_ENABLED) 339 cl_data->sensor_sts[i] = SENSOR_ENABLED; 340 } else { 341 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]); 342 status = amd_sfh_wait_for_response 343 (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR); 344 if (status == 0) 345 status = SENSOR_DISABLED; 346 if (status != SENSOR_ENABLED) 347 cl_data->sensor_sts[i] = SENSOR_DISABLED; 348 } 349 dev_dbg(&mp2->pdev->dev, "toggle sid 0x%x (%s) status 0x%x\n", 350 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 351 cl_data->sensor_sts[i]); 352 break; 353 } 354 mp2->dev_en.is_hpd_enabled = enabled; 355 } 356 357 static void amd_mp2_pci_remove(void *privdata) 358 { 359 struct amd_mp2_dev *mp2 = privdata; 360 361 sfh_deinit_emp2(); 362 amd_sfh_hid_client_deinit(privdata); 363 mp2->mp2_ops->stop_all(mp2); 364 pcim_intx(mp2->pdev, false); 365 amd_sfh_clear_intr(mp2); 366 } 367 368 static void amd_sfh_set_ops(struct amd_mp2_dev *mp2) 369 { 370 struct amd_mp2_ops *mp2_ops; 371 372 sfh_interface_init(mp2); 373 mp2_ops = mp2->mp2_ops; 374 mp2_ops->clear_intr = amd_sfh_clear_intr_v2; 375 mp2_ops->init_intr = amd_sfh_irq_init_v2; 376 mp2_ops->suspend = amd_sfh_suspend; 377 mp2_ops->resume = amd_sfh_resume; 378 mp2_ops->remove = amd_mp2_pci_remove; 379 } 380 381 int amd_sfh1_1_init(struct amd_mp2_dev *mp2) 382 { 383 u32 phy_base = readl(mp2->mmio + amd_get_c2p_val(mp2, 22)); 384 struct device *dev = &mp2->pdev->dev; 385 struct sfh_base_info binfo; 386 int rc; 387 388 phy_base <<= 21; 389 if (!devm_request_mem_region(dev, phy_base, 128 * 1024, "amd_sfh")) { 390 dev_dbg(dev, "can't reserve mmio registers\n"); 391 return -ENOMEM; 392 } 393 394 mp2->vsbase = devm_ioremap(dev, phy_base, 128 * 1024); 395 if (!mp2->vsbase) { 396 dev_dbg(dev, "failed to remap vsbase\n"); 397 return -ENOMEM; 398 } 399 400 /* Before accessing give time for SFH firmware for processing configuration */ 401 msleep(5000); 402 403 memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info)); 404 if (binfo.sbase.fw_info.fw_ver == 0 || binfo.sbase.s_list.sl.sensors == 0) { 405 dev_dbg(dev, "No sensor registered\n"); 406 return -EOPNOTSUPP; 407 } 408 dev_dbg(dev, "firmware version 0x%x\n", binfo.sbase.fw_info.fw_ver); 409 410 amd_sfh_set_ops(mp2); 411 412 rc = amd_sfh_irq_init(mp2); 413 if (rc) { 414 sfh_deinit_emp2(); 415 dev_err(dev, "amd_sfh_irq_init failed\n"); 416 return rc; 417 } 418 419 rc = amd_sfh1_1_hid_client_init(mp2); 420 if (rc) { 421 sfh_deinit_emp2(); 422 if ((rc != -ENODEV) && (rc != -EOPNOTSUPP)) 423 dev_err(dev, "amd_sfh1_1_hid_client_init failed\n"); 424 return rc; 425 } 426 427 return rc; 428 } 429