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 } 87 88 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) { 89 privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]); 90 status = amd_sfh_wait_for_response 91 (privdata, cl_data->sensor_idx[i], DISABLE_SENSOR); 92 if (status == 0) 93 cl_data->sensor_sts[i] = SENSOR_DISABLED; 94 dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x (%s) status 0x%x\n", 95 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 96 cl_data->sensor_sts[i]); 97 } 98 } 99 100 cancel_delayed_work_sync(&cl_data->work); 101 cancel_delayed_work_sync(&cl_data->work_buffer); 102 amdtp_hid_remove(cl_data); 103 104 return 0; 105 } 106 107 static int amd_sfh1_1_hid_client_init(struct amd_mp2_dev *privdata) 108 { 109 struct amd_input_data *in_data = &privdata->in_data; 110 struct amdtp_cl_data *cl_data = privdata->cl_data; 111 struct amd_mp2_ops *mp2_ops = privdata->mp2_ops; 112 struct amd_mp2_sensor_info info; 113 struct request_list *req_list; 114 u32 feature_report_size; 115 u32 input_report_size; 116 struct device *dev; 117 int rc, i, status; 118 u8 cl_idx; 119 120 req_list = &cl_data->req_list; 121 dev = &privdata->pdev->dev; 122 amd_sfh1_1_set_desc_ops(mp2_ops); 123 124 cl_data->num_hid_devices = amd_sfh_get_sensor_num(privdata, &cl_data->sensor_idx[0]); 125 if (cl_data->num_hid_devices == 0) 126 return -ENODEV; 127 cl_data->is_any_sensor_enabled = false; 128 129 INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work); 130 INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer); 131 INIT_LIST_HEAD(&req_list->list); 132 cl_data->in_data = in_data; 133 134 for (i = 0; i < cl_data->num_hid_devices; i++) { 135 cl_data->sensor_sts[i] = SENSOR_DISABLED; 136 137 if (cl_data->num_hid_devices == 1 && cl_data->sensor_idx[0] == SRA_IDX) 138 break; 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 privdata->dev_en.is_sra_present = true; 150 continue; 151 } 152 153 cl_data->sensor_requested_cnt[i] = 0; 154 cl_data->cur_hid_dev = i; 155 cl_idx = cl_data->sensor_idx[i]; 156 157 cl_data->report_descr_sz[i] = mp2_ops->get_desc_sz(cl_idx, descr_size); 158 if (!cl_data->report_descr_sz[i]) { 159 rc = -EINVAL; 160 goto cleanup; 161 } 162 feature_report_size = mp2_ops->get_desc_sz(cl_idx, feature_size); 163 if (!feature_report_size) { 164 rc = -EINVAL; 165 goto cleanup; 166 } 167 input_report_size = mp2_ops->get_desc_sz(cl_idx, input_size); 168 if (!input_report_size) { 169 rc = -EINVAL; 170 goto cleanup; 171 } 172 cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL); 173 if (!cl_data->feature_report[i]) { 174 rc = -ENOMEM; 175 goto cleanup; 176 } 177 in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL); 178 if (!in_data->input_report[i]) { 179 rc = -ENOMEM; 180 goto cleanup; 181 } 182 183 info.sensor_idx = cl_idx; 184 185 cl_data->report_descr[i] = 186 devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL); 187 if (!cl_data->report_descr[i]) { 188 rc = -ENOMEM; 189 goto cleanup; 190 } 191 rc = mp2_ops->get_rep_desc(cl_idx, cl_data->report_descr[i]); 192 if (rc) 193 goto cleanup; 194 195 writel(0, privdata->mmio + amd_get_p2c_val(privdata, 0)); 196 mp2_ops->start(privdata, info); 197 status = amd_sfh_wait_for_response 198 (privdata, cl_data->sensor_idx[i], ENABLE_SENSOR); 199 200 cl_data->sensor_sts[i] = (status == 0) ? SENSOR_ENABLED : SENSOR_DISABLED; 201 } 202 203 for (i = 0; i < cl_data->num_hid_devices; i++) { 204 if (cl_data->sensor_idx[i] == SRA_IDX) 205 continue; 206 cl_data->cur_hid_dev = i; 207 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) { 208 cl_data->is_any_sensor_enabled = true; 209 rc = amdtp_hid_probe(i, cl_data); 210 if (rc) 211 goto cleanup; 212 switch (cl_data->sensor_idx[i]) { 213 case HPD_IDX: 214 privdata->dev_en.is_hpd_present = true; 215 privdata->dev_en.is_hpd_enabled = true; 216 amd_sfh_toggle_hpd(privdata, false); 217 break; 218 case ALS_IDX: 219 privdata->dev_en.is_als_present = true; 220 break; 221 } 222 } 223 dev_dbg(dev, "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 if (!cl_data->is_any_sensor_enabled) { 229 dev_warn(dev, "No sensor registered, sensors not enabled is %d\n", 230 cl_data->is_any_sensor_enabled); 231 rc = -EOPNOTSUPP; 232 goto cleanup; 233 } 234 235 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP)); 236 return 0; 237 238 cleanup: 239 amd_sfh_hid_client_deinit(privdata); 240 for (i = 0; i < cl_data->num_hid_devices; i++) { 241 devm_kfree(dev, cl_data->feature_report[i]); 242 devm_kfree(dev, in_data->input_report[i]); 243 devm_kfree(dev, cl_data->report_descr[i]); 244 } 245 return rc; 246 } 247 248 static void amd_sfh_resume(struct amd_mp2_dev *mp2) 249 { 250 struct amdtp_cl_data *cl_data = mp2->cl_data; 251 struct amd_mp2_sensor_info info; 252 int i, status; 253 254 if (!cl_data->is_any_sensor_enabled) { 255 amd_sfh_clear_intr(mp2); 256 return; 257 } 258 259 for (i = 0; i < cl_data->num_hid_devices; i++) { 260 /* leave HPD alone; policy is controlled by sysfs */ 261 if (cl_data->sensor_idx[i] == HPD_IDX) 262 continue; 263 264 if (cl_data->sensor_sts[i] == SENSOR_DISABLED) { 265 info.sensor_idx = cl_data->sensor_idx[i]; 266 mp2->mp2_ops->start(mp2, info); 267 status = amd_sfh_wait_for_response 268 (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR); 269 if (status == 0) 270 status = SENSOR_ENABLED; 271 if (status == SENSOR_ENABLED) 272 cl_data->sensor_sts[i] = SENSOR_ENABLED; 273 dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n", 274 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 275 cl_data->sensor_sts[i]); 276 } 277 } 278 279 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP)); 280 amd_sfh_clear_intr(mp2); 281 } 282 283 static void amd_sfh_suspend(struct amd_mp2_dev *mp2) 284 { 285 struct amdtp_cl_data *cl_data = mp2->cl_data; 286 int i, status; 287 288 if (!cl_data->is_any_sensor_enabled) { 289 amd_sfh_clear_intr(mp2); 290 return; 291 } 292 293 for (i = 0; i < cl_data->num_hid_devices; i++) { 294 /* leave HPD alone; policy is controlled by sysfs */ 295 if (cl_data->sensor_idx[i] == HPD_IDX) 296 continue; 297 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) { 298 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]); 299 status = amd_sfh_wait_for_response 300 (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR); 301 if (status == 0) 302 status = SENSOR_DISABLED; 303 if (status != SENSOR_ENABLED) 304 cl_data->sensor_sts[i] = SENSOR_DISABLED; 305 dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n", 306 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 307 cl_data->sensor_sts[i]); 308 } 309 } 310 311 cancel_delayed_work_sync(&cl_data->work_buffer); 312 amd_sfh_clear_intr(mp2); 313 } 314 315 void amd_sfh_toggle_hpd(struct amd_mp2_dev *mp2, bool enabled) 316 { 317 struct amdtp_cl_data *cl_data = mp2->cl_data; 318 struct amd_mp2_sensor_info info; 319 int i, status; 320 321 if (mp2->dev_en.is_hpd_enabled == enabled) 322 return; 323 324 for (i = 0; i < cl_data->num_hid_devices; i++) { 325 if (cl_data->sensor_idx[i] != HPD_IDX) 326 continue; 327 info.sensor_idx = cl_data->sensor_idx[i]; 328 if (enabled) { 329 mp2->mp2_ops->start(mp2, info); 330 status = amd_sfh_wait_for_response 331 (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR); 332 if (status == 0) 333 status = SENSOR_ENABLED; 334 if (status == SENSOR_ENABLED) 335 cl_data->sensor_sts[i] = SENSOR_ENABLED; 336 } else { 337 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]); 338 status = amd_sfh_wait_for_response 339 (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR); 340 if (status == 0) 341 status = SENSOR_DISABLED; 342 if (status != SENSOR_ENABLED) 343 cl_data->sensor_sts[i] = SENSOR_DISABLED; 344 } 345 dev_dbg(&mp2->pdev->dev, "toggle sid 0x%x (%s) status 0x%x\n", 346 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 347 cl_data->sensor_sts[i]); 348 break; 349 } 350 mp2->dev_en.is_hpd_enabled = enabled; 351 } 352 353 static void amd_mp2_pci_remove(void *privdata) 354 { 355 struct amd_mp2_dev *mp2 = privdata; 356 357 sfh_deinit_emp2(); 358 amd_sfh_hid_client_deinit(privdata); 359 mp2->mp2_ops->stop_all(mp2); 360 pcim_intx(mp2->pdev, false); 361 amd_sfh_clear_intr(mp2); 362 } 363 364 static void amd_sfh_set_ops(struct amd_mp2_dev *mp2) 365 { 366 struct amd_mp2_ops *mp2_ops; 367 368 sfh_interface_init(mp2); 369 mp2_ops = mp2->mp2_ops; 370 mp2_ops->clear_intr = amd_sfh_clear_intr_v2; 371 mp2_ops->init_intr = amd_sfh_irq_init_v2; 372 mp2_ops->suspend = amd_sfh_suspend; 373 mp2_ops->resume = amd_sfh_resume; 374 mp2_ops->remove = amd_mp2_pci_remove; 375 } 376 377 int amd_sfh1_1_init(struct amd_mp2_dev *mp2) 378 { 379 u32 phy_base = readl(mp2->mmio + amd_get_c2p_val(mp2, 22)); 380 struct device *dev = &mp2->pdev->dev; 381 struct sfh_base_info binfo; 382 int rc; 383 384 phy_base <<= 21; 385 if (!devm_request_mem_region(dev, phy_base, 128 * 1024, "amd_sfh")) { 386 dev_dbg(dev, "can't reserve mmio registers\n"); 387 return -ENOMEM; 388 } 389 390 mp2->vsbase = devm_ioremap(dev, phy_base, 128 * 1024); 391 if (!mp2->vsbase) { 392 dev_dbg(dev, "failed to remap vsbase\n"); 393 return -ENOMEM; 394 } 395 396 /* Before accessing give time for SFH firmware for processing configuration */ 397 msleep(5000); 398 399 memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info)); 400 if (binfo.sbase.fw_info.fw_ver == 0 || binfo.sbase.s_list.sl.sensors == 0) { 401 dev_dbg(dev, "No sensor registered\n"); 402 return -EOPNOTSUPP; 403 } 404 dev_dbg(dev, "firmware version 0x%x\n", binfo.sbase.fw_info.fw_ver); 405 406 amd_sfh_set_ops(mp2); 407 408 rc = amd_sfh_irq_init(mp2); 409 if (rc) { 410 sfh_deinit_emp2(); 411 dev_err(dev, "amd_sfh_irq_init failed\n"); 412 return rc; 413 } 414 415 rc = amd_sfh1_1_hid_client_init(mp2); 416 if (rc) { 417 sfh_deinit_emp2(); 418 if ((rc != -ENODEV) && (rc != -EOPNOTSUPP)) 419 dev_err(dev, "amd_sfh1_1_hid_client_init failed\n"); 420 return rc; 421 } 422 423 return rc; 424 } 425