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 switch (cl_data->sensor_idx[i]) { 77 case HPD_IDX: 78 privdata->dev_en.is_hpd_present = false; 79 break; 80 case ALS_IDX: 81 privdata->dev_en.is_als_present = false; 82 break; 83 } 84 85 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) { 86 privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]); 87 status = amd_sfh_wait_for_response 88 (privdata, cl_data->sensor_idx[i], DISABLE_SENSOR); 89 if (status == 0) 90 cl_data->sensor_sts[i] = SENSOR_DISABLED; 91 dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x (%s) status 0x%x\n", 92 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 93 cl_data->sensor_sts[i]); 94 } 95 } 96 97 cancel_delayed_work_sync(&cl_data->work); 98 cancel_delayed_work_sync(&cl_data->work_buffer); 99 amdtp_hid_remove(cl_data); 100 101 return 0; 102 } 103 104 static int amd_sfh1_1_hid_client_init(struct amd_mp2_dev *privdata) 105 { 106 struct amd_input_data *in_data = &privdata->in_data; 107 struct amdtp_cl_data *cl_data = privdata->cl_data; 108 struct amd_mp2_ops *mp2_ops = privdata->mp2_ops; 109 struct amd_mp2_sensor_info info; 110 struct request_list *req_list; 111 u32 feature_report_size; 112 u32 input_report_size; 113 struct device *dev; 114 int rc, i, status; 115 u8 cl_idx; 116 117 req_list = &cl_data->req_list; 118 dev = &privdata->pdev->dev; 119 amd_sfh1_1_set_desc_ops(mp2_ops); 120 121 cl_data->num_hid_devices = amd_sfh_get_sensor_num(privdata, &cl_data->sensor_idx[0]); 122 if (cl_data->num_hid_devices == 0) 123 return -ENODEV; 124 cl_data->is_any_sensor_enabled = false; 125 126 INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work); 127 INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer); 128 INIT_LIST_HEAD(&req_list->list); 129 cl_data->in_data = in_data; 130 131 for (i = 0; i < cl_data->num_hid_devices; i++) { 132 cl_data->sensor_sts[i] = SENSOR_DISABLED; 133 cl_data->sensor_requested_cnt[i] = 0; 134 cl_data->cur_hid_dev = i; 135 cl_idx = cl_data->sensor_idx[i]; 136 137 cl_data->report_descr_sz[i] = mp2_ops->get_desc_sz(cl_idx, descr_size); 138 if (!cl_data->report_descr_sz[i]) { 139 rc = -EINVAL; 140 goto cleanup; 141 } 142 feature_report_size = mp2_ops->get_desc_sz(cl_idx, feature_size); 143 if (!feature_report_size) { 144 rc = -EINVAL; 145 goto cleanup; 146 } 147 input_report_size = mp2_ops->get_desc_sz(cl_idx, input_size); 148 if (!input_report_size) { 149 rc = -EINVAL; 150 goto cleanup; 151 } 152 cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL); 153 if (!cl_data->feature_report[i]) { 154 rc = -ENOMEM; 155 goto cleanup; 156 } 157 in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL); 158 if (!in_data->input_report[i]) { 159 rc = -ENOMEM; 160 goto cleanup; 161 } 162 163 info.sensor_idx = cl_idx; 164 165 cl_data->report_descr[i] = 166 devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL); 167 if (!cl_data->report_descr[i]) { 168 rc = -ENOMEM; 169 goto cleanup; 170 } 171 rc = mp2_ops->get_rep_desc(cl_idx, cl_data->report_descr[i]); 172 if (rc) 173 goto cleanup; 174 175 writel(0, privdata->mmio + amd_get_p2c_val(privdata, 0)); 176 mp2_ops->start(privdata, info); 177 status = amd_sfh_wait_for_response 178 (privdata, cl_data->sensor_idx[i], ENABLE_SENSOR); 179 180 cl_data->sensor_sts[i] = (status == 0) ? SENSOR_ENABLED : SENSOR_DISABLED; 181 } 182 183 for (i = 0; i < cl_data->num_hid_devices; i++) { 184 cl_data->cur_hid_dev = i; 185 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) { 186 cl_data->is_any_sensor_enabled = true; 187 rc = amdtp_hid_probe(i, cl_data); 188 if (rc) 189 goto cleanup; 190 switch (cl_data->sensor_idx[i]) { 191 case HPD_IDX: 192 privdata->dev_en.is_hpd_present = true; 193 break; 194 case ALS_IDX: 195 privdata->dev_en.is_als_present = true; 196 break; 197 } 198 } 199 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n", 200 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 201 cl_data->sensor_sts[i]); 202 } 203 204 if (!cl_data->is_any_sensor_enabled) { 205 dev_warn(dev, "Failed to discover, sensors not enabled is %d\n", 206 cl_data->is_any_sensor_enabled); 207 rc = -EOPNOTSUPP; 208 goto cleanup; 209 } 210 211 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP)); 212 return 0; 213 214 cleanup: 215 amd_sfh_hid_client_deinit(privdata); 216 for (i = 0; i < cl_data->num_hid_devices; i++) { 217 devm_kfree(dev, cl_data->feature_report[i]); 218 devm_kfree(dev, in_data->input_report[i]); 219 devm_kfree(dev, cl_data->report_descr[i]); 220 } 221 return rc; 222 } 223 224 static void amd_sfh_resume(struct amd_mp2_dev *mp2) 225 { 226 struct amdtp_cl_data *cl_data = mp2->cl_data; 227 struct amd_mp2_sensor_info info; 228 int i, status; 229 230 for (i = 0; i < cl_data->num_hid_devices; i++) { 231 if (cl_data->sensor_sts[i] == SENSOR_DISABLED) { 232 info.sensor_idx = cl_data->sensor_idx[i]; 233 mp2->mp2_ops->start(mp2, info); 234 status = amd_sfh_wait_for_response 235 (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR); 236 if (status == 0) 237 status = SENSOR_ENABLED; 238 if (status == SENSOR_ENABLED) 239 cl_data->sensor_sts[i] = SENSOR_ENABLED; 240 dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n", 241 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 242 cl_data->sensor_sts[i]); 243 } 244 } 245 246 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP)); 247 amd_sfh_clear_intr(mp2); 248 } 249 250 static void amd_sfh_suspend(struct amd_mp2_dev *mp2) 251 { 252 struct amdtp_cl_data *cl_data = mp2->cl_data; 253 int i, status; 254 255 for (i = 0; i < cl_data->num_hid_devices; i++) { 256 if (cl_data->sensor_idx[i] != HPD_IDX && 257 cl_data->sensor_sts[i] == SENSOR_ENABLED) { 258 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]); 259 status = amd_sfh_wait_for_response 260 (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR); 261 if (status == 0) 262 status = SENSOR_DISABLED; 263 if (status != SENSOR_ENABLED) 264 cl_data->sensor_sts[i] = SENSOR_DISABLED; 265 dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n", 266 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 267 cl_data->sensor_sts[i]); 268 } 269 } 270 271 cancel_delayed_work_sync(&cl_data->work_buffer); 272 amd_sfh_clear_intr(mp2); 273 } 274 275 static void amd_mp2_pci_remove(void *privdata) 276 { 277 struct amd_mp2_dev *mp2 = privdata; 278 279 sfh_deinit_emp2(); 280 amd_sfh_hid_client_deinit(privdata); 281 mp2->mp2_ops->stop_all(mp2); 282 pci_intx(mp2->pdev, false); 283 amd_sfh_clear_intr(mp2); 284 } 285 286 static void amd_sfh_set_ops(struct amd_mp2_dev *mp2) 287 { 288 struct amd_mp2_ops *mp2_ops; 289 290 sfh_interface_init(mp2); 291 mp2_ops = mp2->mp2_ops; 292 mp2_ops->clear_intr = amd_sfh_clear_intr_v2, 293 mp2_ops->init_intr = amd_sfh_irq_init_v2, 294 mp2_ops->suspend = amd_sfh_suspend; 295 mp2_ops->resume = amd_sfh_resume; 296 mp2_ops->remove = amd_mp2_pci_remove; 297 } 298 299 int amd_sfh1_1_init(struct amd_mp2_dev *mp2) 300 { 301 u32 phy_base = readl(mp2->mmio + amd_get_c2p_val(mp2, 22)); 302 struct device *dev = &mp2->pdev->dev; 303 struct sfh_base_info binfo; 304 int rc; 305 306 phy_base <<= 21; 307 if (!devm_request_mem_region(dev, phy_base, 128 * 1024, "amd_sfh")) { 308 dev_dbg(dev, "can't reserve mmio registers\n"); 309 return -ENOMEM; 310 } 311 312 mp2->vsbase = devm_ioremap(dev, phy_base, 128 * 1024); 313 if (!mp2->vsbase) { 314 dev_dbg(dev, "failed to remap vsbase\n"); 315 return -ENOMEM; 316 } 317 318 /* Before accessing give time for SFH firmware for processing configuration */ 319 msleep(5000); 320 321 memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info)); 322 if (binfo.sbase.fw_info.fw_ver == 0 || binfo.sbase.s_list.sl.sensors == 0) { 323 dev_dbg(dev, "failed to get sensors\n"); 324 return -EOPNOTSUPP; 325 } 326 dev_dbg(dev, "firmware version 0x%x\n", binfo.sbase.fw_info.fw_ver); 327 328 amd_sfh_set_ops(mp2); 329 330 rc = amd_sfh_irq_init(mp2); 331 if (rc) { 332 sfh_deinit_emp2(); 333 dev_err(dev, "amd_sfh_irq_init failed\n"); 334 return rc; 335 } 336 337 rc = amd_sfh1_1_hid_client_init(mp2); 338 if (rc) { 339 sfh_deinit_emp2(); 340 dev_err(dev, "amd_sfh1_1_hid_client_init failed\n"); 341 return rc; 342 } 343 344 return rc; 345 } 346