1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * AMD SFH Client Layer 4 * Copyright 2020 Advanced Micro Devices, Inc. 5 * Authors: Nehal Bakulchandra Shah <Nehal-Bakulchandra.Shah@amd.com> 6 * Sandeep Singh <Sandeep.singh@amd.com> 7 */ 8 9 #include <linux/dma-mapping.h> 10 #include <linux/hid.h> 11 #include <linux/list.h> 12 #include <linux/slab.h> 13 #include <linux/workqueue.h> 14 #include <linux/errno.h> 15 16 #include "hid_descriptor/amd_sfh_hid_desc.h" 17 #include "amd_sfh_pcie.h" 18 #include "amd_sfh_hid.h" 19 20 #define AMD_SFH_IDLE_LOOP 200 21 22 struct request_list { 23 struct hid_device *hid; 24 struct list_head list; 25 u8 report_id; 26 u8 sensor_idx; 27 u8 report_type; 28 u8 current_index; 29 }; 30 31 static struct request_list req_list; 32 33 void amd_sfh_set_report(struct hid_device *hid, int report_id, 34 int report_type) 35 { 36 struct amdtp_hid_data *hid_data = hid->driver_data; 37 struct amdtp_cl_data *cli_data = hid_data->cli_data; 38 int i; 39 40 for (i = 0; i < cli_data->num_hid_devices; i++) { 41 if (cli_data->hid_sensor_hubs[i] == hid) { 42 cli_data->cur_hid_dev = i; 43 break; 44 } 45 } 46 amdtp_hid_wakeup(hid); 47 } 48 49 int amd_sfh_get_report(struct hid_device *hid, int report_id, int report_type) 50 { 51 struct amdtp_hid_data *hid_data = hid->driver_data; 52 struct amdtp_cl_data *cli_data = hid_data->cli_data; 53 int i; 54 55 for (i = 0; i < cli_data->num_hid_devices; i++) { 56 if (cli_data->hid_sensor_hubs[i] == hid) { 57 struct request_list *new = kzalloc(sizeof(*new), GFP_KERNEL); 58 59 if (!new) 60 return -ENOMEM; 61 62 new->current_index = i; 63 new->sensor_idx = cli_data->sensor_idx[i]; 64 new->hid = hid; 65 new->report_type = report_type; 66 new->report_id = report_id; 67 cli_data->report_id[i] = report_id; 68 cli_data->request_done[i] = false; 69 list_add(&new->list, &req_list.list); 70 break; 71 } 72 } 73 schedule_delayed_work(&cli_data->work, 0); 74 return 0; 75 } 76 77 static void amd_sfh_work(struct work_struct *work) 78 { 79 struct amdtp_cl_data *cli_data = container_of(work, struct amdtp_cl_data, work.work); 80 struct request_list *req_node; 81 u8 current_index, sensor_index; 82 u8 report_id, node_type; 83 u8 report_size = 0; 84 85 req_node = list_last_entry(&req_list.list, struct request_list, list); 86 list_del(&req_node->list); 87 current_index = req_node->current_index; 88 sensor_index = req_node->sensor_idx; 89 report_id = req_node->report_id; 90 node_type = req_node->report_type; 91 kfree(req_node); 92 93 if (node_type == HID_FEATURE_REPORT) { 94 report_size = get_feature_report(sensor_index, report_id, 95 cli_data->feature_report[current_index]); 96 if (report_size) 97 hid_input_report(cli_data->hid_sensor_hubs[current_index], 98 cli_data->report_type[current_index], 99 cli_data->feature_report[current_index], report_size, 0); 100 else 101 pr_err("AMDSFH: Invalid report size\n"); 102 103 } else if (node_type == HID_INPUT_REPORT) { 104 report_size = get_input_report(sensor_index, report_id, 105 cli_data->input_report[current_index], 106 cli_data->sensor_virt_addr[current_index]); 107 if (report_size) 108 hid_input_report(cli_data->hid_sensor_hubs[current_index], 109 cli_data->report_type[current_index], 110 cli_data->input_report[current_index], report_size, 0); 111 else 112 pr_err("AMDSFH: Invalid report size\n"); 113 } 114 cli_data->cur_hid_dev = current_index; 115 cli_data->sensor_requested_cnt[current_index] = 0; 116 amdtp_hid_wakeup(cli_data->hid_sensor_hubs[current_index]); 117 } 118 119 static void amd_sfh_work_buffer(struct work_struct *work) 120 { 121 struct amdtp_cl_data *cli_data = container_of(work, struct amdtp_cl_data, work_buffer.work); 122 u8 report_size; 123 int i; 124 125 for (i = 0; i < cli_data->num_hid_devices; i++) { 126 report_size = get_input_report(cli_data->sensor_idx[i], cli_data->report_id[i], 127 cli_data->input_report[i], 128 cli_data->sensor_virt_addr[i]); 129 hid_input_report(cli_data->hid_sensor_hubs[i], HID_INPUT_REPORT, 130 cli_data->input_report[i], report_size, 0); 131 } 132 schedule_delayed_work(&cli_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP)); 133 } 134 135 int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata) 136 { 137 struct amdtp_cl_data *cl_data = privdata->cl_data; 138 struct amd_mp2_sensor_info info; 139 struct device *dev; 140 u32 feature_report_size; 141 u32 input_report_size; 142 u8 cl_idx; 143 int rc, i; 144 145 dev = &privdata->pdev->dev; 146 cl_data = devm_kzalloc(dev, sizeof(*cl_data), GFP_KERNEL); 147 if (!cl_data) 148 return -ENOMEM; 149 150 cl_data->num_hid_devices = amd_mp2_get_sensor_num(privdata, &cl_data->sensor_idx[0]); 151 152 INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work); 153 INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer); 154 INIT_LIST_HEAD(&req_list.list); 155 156 for (i = 0; i < cl_data->num_hid_devices; i++) { 157 cl_data->sensor_virt_addr[i] = dma_alloc_coherent(dev, sizeof(int) * 8, 158 &cl_data->sensor_dma_addr[i], 159 GFP_KERNEL); 160 cl_data->sensor_sts[i] = 0; 161 cl_data->sensor_requested_cnt[i] = 0; 162 cl_data->cur_hid_dev = i; 163 cl_idx = cl_data->sensor_idx[i]; 164 cl_data->report_descr_sz[i] = get_descr_sz(cl_idx, descr_size); 165 if (!cl_data->report_descr_sz[i]) { 166 rc = -EINVAL; 167 goto cleanup; 168 } 169 feature_report_size = get_descr_sz(cl_idx, feature_size); 170 if (!feature_report_size) { 171 rc = -EINVAL; 172 goto cleanup; 173 } 174 input_report_size = get_descr_sz(cl_idx, input_size); 175 if (!input_report_size) { 176 rc = -EINVAL; 177 goto cleanup; 178 } 179 cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL); 180 if (!cl_data->feature_report[i]) { 181 rc = -ENOMEM; 182 goto cleanup; 183 } 184 cl_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL); 185 if (!cl_data->input_report[i]) { 186 rc = -ENOMEM; 187 goto cleanup; 188 } 189 info.period = msecs_to_jiffies(AMD_SFH_IDLE_LOOP); 190 info.sensor_idx = cl_idx; 191 info.dma_address = cl_data->sensor_dma_addr[i]; 192 193 cl_data->report_descr[i] = 194 devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL); 195 if (!cl_data->report_descr[i]) { 196 rc = -ENOMEM; 197 goto cleanup; 198 } 199 rc = get_report_descriptor(cl_idx, cl_data->report_descr[i]); 200 if (rc) 201 return rc; 202 rc = amdtp_hid_probe(cl_data->cur_hid_dev, cl_data); 203 if (rc) 204 return rc; 205 amd_start_sensor(privdata, info); 206 cl_data->sensor_sts[i] = 1; 207 } 208 privdata->cl_data = cl_data; 209 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP)); 210 return 0; 211 212 cleanup: 213 for (i = 0; i < cl_data->num_hid_devices; i++) { 214 if (cl_data->sensor_virt_addr[i]) { 215 dma_free_coherent(&privdata->pdev->dev, 8 * sizeof(int), 216 cl_data->sensor_virt_addr[i], 217 cl_data->sensor_dma_addr[i]); 218 } 219 devm_kfree(dev, cl_data->feature_report[i]); 220 devm_kfree(dev, cl_data->input_report[i]); 221 devm_kfree(dev, cl_data->report_descr[i]); 222 } 223 devm_kfree(dev, cl_data); 224 return rc; 225 } 226 227 int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata) 228 { 229 struct amdtp_cl_data *cl_data = privdata->cl_data; 230 int i; 231 232 for (i = 0; i < cl_data->num_hid_devices; i++) 233 amd_stop_sensor(privdata, i); 234 235 cancel_delayed_work_sync(&cl_data->work); 236 cancel_delayed_work_sync(&cl_data->work_buffer); 237 amdtp_hid_remove(cl_data); 238 239 for (i = 0; i < cl_data->num_hid_devices; i++) { 240 if (cl_data->sensor_virt_addr[i]) { 241 dma_free_coherent(&privdata->pdev->dev, 8 * sizeof(int), 242 cl_data->sensor_virt_addr[i], 243 cl_data->sensor_dma_addr[i]); 244 } 245 } 246 return 0; 247 } 248