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 if (!cl_data->is_any_sensor_enabled) { 214 amd_sfh_clear_intr(mp2); 215 return; 216 } 217 218 for (i = 0; i < cl_data->num_hid_devices; i++) { 219 if (cl_data->sensor_sts[i] == SENSOR_DISABLED) { 220 info.sensor_idx = cl_data->sensor_idx[i]; 221 mp2->mp2_ops->start(mp2, info); 222 status = amd_sfh_wait_for_response 223 (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR); 224 if (status == 0) 225 status = SENSOR_ENABLED; 226 if (status == SENSOR_ENABLED) 227 cl_data->sensor_sts[i] = SENSOR_ENABLED; 228 dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n", 229 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 230 cl_data->sensor_sts[i]); 231 } 232 } 233 234 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP)); 235 amd_sfh_clear_intr(mp2); 236 } 237 238 static void amd_sfh_suspend(struct amd_mp2_dev *mp2) 239 { 240 struct amdtp_cl_data *cl_data = mp2->cl_data; 241 int i, status; 242 243 if (!cl_data->is_any_sensor_enabled) { 244 amd_sfh_clear_intr(mp2); 245 return; 246 } 247 248 for (i = 0; i < cl_data->num_hid_devices; i++) { 249 if (cl_data->sensor_idx[i] != HPD_IDX && 250 cl_data->sensor_sts[i] == SENSOR_ENABLED) { 251 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]); 252 status = amd_sfh_wait_for_response 253 (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR); 254 if (status == 0) 255 status = SENSOR_DISABLED; 256 if (status != SENSOR_ENABLED) 257 cl_data->sensor_sts[i] = SENSOR_DISABLED; 258 dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n", 259 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 260 cl_data->sensor_sts[i]); 261 } 262 } 263 264 cancel_delayed_work_sync(&cl_data->work_buffer); 265 amd_sfh_clear_intr(mp2); 266 } 267 268 static void amd_mp2_pci_remove(void *privdata) 269 { 270 struct amd_mp2_dev *mp2 = privdata; 271 272 amd_sfh_hid_client_deinit(privdata); 273 mp2->mp2_ops->stop_all(mp2); 274 pci_intx(mp2->pdev, false); 275 amd_sfh_clear_intr(mp2); 276 } 277 278 static void amd_sfh_set_ops(struct amd_mp2_dev *mp2) 279 { 280 struct amd_mp2_ops *mp2_ops; 281 282 sfh_interface_init(mp2); 283 mp2_ops = mp2->mp2_ops; 284 mp2_ops->clear_intr = amd_sfh_clear_intr_v2, 285 mp2_ops->init_intr = amd_sfh_irq_init_v2, 286 mp2_ops->suspend = amd_sfh_suspend; 287 mp2_ops->resume = amd_sfh_resume; 288 mp2_ops->remove = amd_mp2_pci_remove; 289 } 290 291 int amd_sfh1_1_init(struct amd_mp2_dev *mp2) 292 { 293 u32 phy_base = readl(mp2->mmio + AMD_C2P_MSG(22)); 294 struct device *dev = &mp2->pdev->dev; 295 struct sfh_base_info binfo; 296 int rc; 297 298 phy_base <<= 21; 299 if (!devm_request_mem_region(dev, phy_base, 128 * 1024, "amd_sfh")) { 300 dev_dbg(dev, "can't reserve mmio registers\n"); 301 return -ENOMEM; 302 } 303 304 mp2->vsbase = devm_ioremap(dev, phy_base, 128 * 1024); 305 if (!mp2->vsbase) { 306 dev_dbg(dev, "failed to remap vsbase\n"); 307 return -ENOMEM; 308 } 309 310 /* Before accessing give time for SFH firmware for processing configuration */ 311 msleep(5000); 312 313 memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info)); 314 if (binfo.sbase.fw_info.fw_ver == 0 || binfo.sbase.s_list.sl.sensors == 0) { 315 dev_dbg(dev, "failed to get sensors\n"); 316 return -EOPNOTSUPP; 317 } 318 dev_dbg(dev, "firmware version 0x%x\n", binfo.sbase.fw_info.fw_ver); 319 320 amd_sfh_set_ops(mp2); 321 322 rc = amd_sfh_irq_init(mp2); 323 if (rc) { 324 dev_err(dev, "amd_sfh_irq_init failed\n"); 325 return rc; 326 } 327 328 rc = amd_sfh1_1_hid_client_init(mp2); 329 if (rc) { 330 dev_err(dev, "amd_sfh1_1_hid_client_init failed\n"); 331 return rc; 332 } 333 334 return rc; 335 } 336