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; 115 116 INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work); 117 INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer); 118 INIT_LIST_HEAD(&req_list->list); 119 cl_data->in_data = in_data; 120 121 for (i = 0; i < cl_data->num_hid_devices; i++) { 122 cl_data->sensor_sts[i] = SENSOR_DISABLED; 123 cl_data->sensor_requested_cnt[i] = 0; 124 cl_data->cur_hid_dev = i; 125 cl_idx = cl_data->sensor_idx[i]; 126 127 cl_data->report_descr_sz[i] = mp2_ops->get_desc_sz(cl_idx, descr_size); 128 if (!cl_data->report_descr_sz[i]) { 129 rc = -EINVAL; 130 goto cleanup; 131 } 132 feature_report_size = mp2_ops->get_desc_sz(cl_idx, feature_size); 133 if (!feature_report_size) { 134 rc = -EINVAL; 135 goto cleanup; 136 } 137 input_report_size = mp2_ops->get_desc_sz(cl_idx, input_size); 138 if (!input_report_size) { 139 rc = -EINVAL; 140 goto cleanup; 141 } 142 cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL); 143 if (!cl_data->feature_report[i]) { 144 rc = -ENOMEM; 145 goto cleanup; 146 } 147 in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL); 148 if (!in_data->input_report[i]) { 149 rc = -ENOMEM; 150 goto cleanup; 151 } 152 153 info.sensor_idx = cl_idx; 154 155 cl_data->report_descr[i] = 156 devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL); 157 if (!cl_data->report_descr[i]) { 158 rc = -ENOMEM; 159 goto cleanup; 160 } 161 rc = mp2_ops->get_rep_desc(cl_idx, cl_data->report_descr[i]); 162 if (rc) 163 return rc; 164 165 writel(0, privdata->mmio + AMD_P2C_MSG(0)); 166 mp2_ops->start(privdata, info); 167 status = amd_sfh_wait_for_response 168 (privdata, cl_data->sensor_idx[i], ENABLE_SENSOR); 169 170 status = (status == 0) ? SENSOR_ENABLED : SENSOR_DISABLED; 171 172 if (status == SENSOR_ENABLED) { 173 cl_data->sensor_sts[i] = SENSOR_ENABLED; 174 rc = amdtp_hid_probe(i, cl_data); 175 if (rc) { 176 mp2_ops->stop(privdata, cl_data->sensor_idx[i]); 177 status = amd_sfh_wait_for_response 178 (privdata, cl_data->sensor_idx[i], DISABLE_SENSOR); 179 if (status == 0) 180 status = SENSOR_DISABLED; 181 if (status != SENSOR_ENABLED) 182 cl_data->sensor_sts[i] = SENSOR_DISABLED; 183 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n", 184 cl_data->sensor_idx[i], 185 get_sensor_name(cl_data->sensor_idx[i]), 186 cl_data->sensor_sts[i]); 187 goto cleanup; 188 } 189 } 190 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n", 191 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 192 cl_data->sensor_sts[i]); 193 } 194 195 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP)); 196 return 0; 197 198 cleanup: 199 amd_sfh_hid_client_deinit(privdata); 200 for (i = 0; i < cl_data->num_hid_devices; i++) { 201 devm_kfree(dev, cl_data->feature_report[i]); 202 devm_kfree(dev, in_data->input_report[i]); 203 devm_kfree(dev, cl_data->report_descr[i]); 204 } 205 return rc; 206 } 207 208 static void amd_sfh_resume(struct amd_mp2_dev *mp2) 209 { 210 struct amdtp_cl_data *cl_data = mp2->cl_data; 211 struct amd_mp2_sensor_info info; 212 int i, status; 213 214 for (i = 0; i < cl_data->num_hid_devices; i++) { 215 if (cl_data->sensor_sts[i] == SENSOR_DISABLED) { 216 info.sensor_idx = cl_data->sensor_idx[i]; 217 mp2->mp2_ops->start(mp2, info); 218 status = amd_sfh_wait_for_response 219 (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR); 220 if (status == 0) 221 status = SENSOR_ENABLED; 222 if (status == SENSOR_ENABLED) 223 cl_data->sensor_sts[i] = SENSOR_ENABLED; 224 dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n", 225 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 226 cl_data->sensor_sts[i]); 227 } 228 } 229 230 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP)); 231 amd_sfh_clear_intr(mp2); 232 } 233 234 static void amd_sfh_suspend(struct amd_mp2_dev *mp2) 235 { 236 struct amdtp_cl_data *cl_data = mp2->cl_data; 237 int i, status; 238 239 for (i = 0; i < cl_data->num_hid_devices; i++) { 240 if (cl_data->sensor_idx[i] != HPD_IDX && 241 cl_data->sensor_sts[i] == SENSOR_ENABLED) { 242 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]); 243 status = amd_sfh_wait_for_response 244 (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR); 245 if (status == 0) 246 status = SENSOR_DISABLED; 247 if (status != SENSOR_ENABLED) 248 cl_data->sensor_sts[i] = SENSOR_DISABLED; 249 dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n", 250 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]), 251 cl_data->sensor_sts[i]); 252 } 253 } 254 255 cancel_delayed_work_sync(&cl_data->work_buffer); 256 amd_sfh_clear_intr(mp2); 257 } 258 259 static void amd_mp2_pci_remove(void *privdata) 260 { 261 struct amd_mp2_dev *mp2 = privdata; 262 263 amd_sfh_hid_client_deinit(privdata); 264 mp2->mp2_ops->stop_all(mp2); 265 pci_intx(mp2->pdev, false); 266 amd_sfh_clear_intr(mp2); 267 } 268 269 static void amd_sfh_set_ops(struct amd_mp2_dev *mp2) 270 { 271 struct amd_mp2_ops *mp2_ops; 272 273 sfh_interface_init(mp2); 274 mp2_ops = mp2->mp2_ops; 275 mp2_ops->clear_intr = amd_sfh_clear_intr_v2, 276 mp2_ops->init_intr = amd_sfh_irq_init_v2, 277 mp2_ops->suspend = amd_sfh_suspend; 278 mp2_ops->resume = amd_sfh_resume; 279 mp2_ops->remove = amd_mp2_pci_remove; 280 } 281 282 int amd_sfh1_1_init(struct amd_mp2_dev *mp2) 283 { 284 u32 phy_base = readl(mp2->mmio + AMD_C2P_MSG(22)); 285 struct device *dev = &mp2->pdev->dev; 286 struct sfh_base_info binfo; 287 int rc; 288 289 phy_base <<= 21; 290 if (!devm_request_mem_region(dev, phy_base, 128 * 1024, "amd_sfh")) { 291 dev_dbg(dev, "can't reserve mmio registers\n"); 292 return -ENOMEM; 293 } 294 295 mp2->vsbase = devm_ioremap(dev, phy_base, 128 * 1024); 296 if (!mp2->vsbase) { 297 dev_dbg(dev, "failed to remap vsbase\n"); 298 return -ENOMEM; 299 } 300 301 /* Before accessing give time for SFH firmware for processing configuration */ 302 msleep(5000); 303 304 memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info)); 305 if (binfo.sbase.fw_info.fw_ver == 0 || binfo.sbase.s_list.sl.sensors == 0) { 306 dev_dbg(dev, "failed to get sensors\n"); 307 return -EOPNOTSUPP; 308 } 309 dev_dbg(dev, "firmware version 0x%x\n", binfo.sbase.fw_info.fw_ver); 310 311 amd_sfh_set_ops(mp2); 312 313 rc = amd_sfh_irq_init(mp2); 314 if (rc) { 315 dev_err(dev, "amd_sfh_irq_init failed\n"); 316 return rc; 317 } 318 319 rc = amd_sfh1_1_hid_client_init(mp2); 320 if (rc) { 321 dev_err(dev, "amd_sfh1_1_hid_client_init failed\n"); 322 return rc; 323 } 324 325 return rc; 326 } 327