1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * AMD SFH Client Layer
4 * Copyright 2020-2021 Advanced Micro Devices, Inc.
5 * Authors: Nehal Bakulchandra Shah <Nehal-Bakulchandra.Shah@amd.com>
6 * Sandeep Singh <Sandeep.singh@amd.com>
7 * Basavaraj Natikar <Basavaraj.Natikar@amd.com>
8 */
9
10 #include <linux/dma-mapping.h>
11 #include <linux/hid.h>
12 #include <linux/list.h>
13 #include <linux/slab.h>
14 #include <linux/workqueue.h>
15 #include <linux/errno.h>
16
17 #include "hid_descriptor/amd_sfh_hid_desc.h"
18 #include "amd_sfh_pcie.h"
19 #include "amd_sfh_hid.h"
20
amd_sfh_set_report(struct hid_device * hid,int report_id,int report_type)21 void amd_sfh_set_report(struct hid_device *hid, int report_id,
22 int report_type)
23 {
24 struct amdtp_hid_data *hid_data = hid->driver_data;
25 struct amdtp_cl_data *cli_data = hid_data->cli_data;
26 int i;
27
28 for (i = 0; i < cli_data->num_hid_devices; i++) {
29 if (cli_data->hid_sensor_hubs[i] == hid) {
30 cli_data->cur_hid_dev = i;
31 break;
32 }
33 }
34 amdtp_hid_wakeup(hid);
35 }
36
amd_sfh_get_report(struct hid_device * hid,int report_id,int report_type)37 int amd_sfh_get_report(struct hid_device *hid, int report_id, int report_type)
38 {
39 struct amdtp_hid_data *hid_data = hid->driver_data;
40 struct amdtp_cl_data *cli_data = hid_data->cli_data;
41 struct request_list *req_list = &cli_data->req_list;
42 int i;
43
44 for (i = 0; i < cli_data->num_hid_devices; i++) {
45 if (cli_data->hid_sensor_hubs[i] == hid) {
46 struct request_list *new = kzalloc(sizeof(*new), GFP_KERNEL);
47
48 if (!new)
49 return -ENOMEM;
50
51 new->current_index = i;
52 new->sensor_idx = cli_data->sensor_idx[i];
53 new->hid = hid;
54 new->report_type = report_type;
55 new->report_id = report_id;
56 cli_data->report_id[i] = report_id;
57 cli_data->request_done[i] = false;
58 list_add(&new->list, &req_list->list);
59 break;
60 }
61 }
62 schedule_delayed_work(&cli_data->work, 0);
63 return 0;
64 }
65
amd_sfh_work(struct work_struct * work)66 void amd_sfh_work(struct work_struct *work)
67 {
68 struct amdtp_cl_data *cli_data = container_of(work, struct amdtp_cl_data, work.work);
69 struct request_list *req_list = &cli_data->req_list;
70 struct amd_input_data *in_data = cli_data->in_data;
71 struct request_list *req_node;
72 u8 current_index, sensor_index;
73 struct amd_mp2_ops *mp2_ops;
74 struct amd_mp2_dev *mp2;
75 u8 report_id, node_type;
76 u8 report_size = 0;
77
78 req_node = list_last_entry(&req_list->list, struct request_list, list);
79 list_del(&req_node->list);
80 current_index = req_node->current_index;
81 sensor_index = req_node->sensor_idx;
82 report_id = req_node->report_id;
83 node_type = req_node->report_type;
84 kfree(req_node);
85
86 mp2 = container_of(in_data, struct amd_mp2_dev, in_data);
87 mp2_ops = mp2->mp2_ops;
88 if (node_type == HID_FEATURE_REPORT) {
89 report_size = mp2_ops->get_feat_rep(sensor_index, report_id,
90 cli_data->feature_report[current_index]);
91 if (report_size)
92 hid_input_report(cli_data->hid_sensor_hubs[current_index],
93 cli_data->report_type[current_index],
94 cli_data->feature_report[current_index], report_size, 0);
95 else
96 pr_err("AMDSFH: Invalid report size\n");
97
98 } else if (node_type == HID_INPUT_REPORT) {
99 report_size = mp2_ops->get_in_rep(current_index, sensor_index, report_id, in_data);
100 if (report_size)
101 hid_input_report(cli_data->hid_sensor_hubs[current_index],
102 cli_data->report_type[current_index],
103 in_data->input_report[current_index], report_size, 0);
104 else
105 pr_err("AMDSFH: Invalid report size\n");
106 }
107 cli_data->cur_hid_dev = current_index;
108 cli_data->sensor_requested_cnt[current_index] = 0;
109 amdtp_hid_wakeup(cli_data->hid_sensor_hubs[current_index]);
110 }
111
amd_sfh_work_buffer(struct work_struct * work)112 void amd_sfh_work_buffer(struct work_struct *work)
113 {
114 struct amdtp_cl_data *cli_data = container_of(work, struct amdtp_cl_data, work_buffer.work);
115 struct amd_input_data *in_data = cli_data->in_data;
116 struct amd_mp2_dev *mp2;
117 u8 report_size;
118 int i;
119
120 for (i = 0; i < cli_data->num_hid_devices; i++) {
121 if (cli_data->sensor_sts[i] == SENSOR_ENABLED) {
122 mp2 = container_of(in_data, struct amd_mp2_dev, in_data);
123 report_size = mp2->mp2_ops->get_in_rep(i, cli_data->sensor_idx[i],
124 cli_data->report_id[i], in_data);
125 hid_input_report(cli_data->hid_sensor_hubs[i], HID_INPUT_REPORT,
126 in_data->input_report[i], report_size, 0);
127 }
128 }
129 schedule_delayed_work(&cli_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
130 }
131
amd_sfh_wait_for_response(struct amd_mp2_dev * mp2,u8 sid,u32 sensor_sts)132 static u32 amd_sfh_wait_for_response(struct amd_mp2_dev *mp2, u8 sid, u32 sensor_sts)
133 {
134 if (mp2->mp2_ops->response)
135 sensor_sts = mp2->mp2_ops->response(mp2, sid, sensor_sts);
136
137 return sensor_sts;
138 }
139
get_sensor_name(int idx)140 static const char *get_sensor_name(int idx)
141 {
142 switch (idx) {
143 case accel_idx:
144 return "accelerometer";
145 case gyro_idx:
146 return "gyroscope";
147 case mag_idx:
148 return "magnetometer";
149 case als_idx:
150 case ACS_IDX: /* ambient color sensor */
151 return "ALS";
152 case HPD_IDX:
153 return "HPD";
154 default:
155 return "unknown sensor type";
156 }
157 }
158
amd_sfh_resume(struct amd_mp2_dev * mp2)159 static void amd_sfh_resume(struct amd_mp2_dev *mp2)
160 {
161 struct amdtp_cl_data *cl_data = mp2->cl_data;
162 struct amd_mp2_sensor_info info;
163 int i, status;
164
165 for (i = 0; i < cl_data->num_hid_devices; i++) {
166 if (cl_data->sensor_sts[i] == SENSOR_DISABLED) {
167 info.period = AMD_SFH_IDLE_LOOP;
168 info.sensor_idx = cl_data->sensor_idx[i];
169 info.dma_address = cl_data->sensor_dma_addr[i];
170 mp2->mp2_ops->start(mp2, info);
171 status = amd_sfh_wait_for_response
172 (mp2, cl_data->sensor_idx[i], SENSOR_ENABLED);
173 if (status == SENSOR_ENABLED)
174 cl_data->sensor_sts[i] = SENSOR_ENABLED;
175 dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n",
176 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
177 cl_data->sensor_sts[i]);
178 }
179 }
180
181 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
182 amd_sfh_clear_intr(mp2);
183 }
184
amd_sfh_suspend(struct amd_mp2_dev * mp2)185 static void amd_sfh_suspend(struct amd_mp2_dev *mp2)
186 {
187 struct amdtp_cl_data *cl_data = mp2->cl_data;
188 int i, status;
189
190 for (i = 0; i < cl_data->num_hid_devices; i++) {
191 if (cl_data->sensor_idx[i] != HPD_IDX &&
192 cl_data->sensor_sts[i] == SENSOR_ENABLED) {
193 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
194 status = amd_sfh_wait_for_response
195 (mp2, cl_data->sensor_idx[i], SENSOR_DISABLED);
196 if (status != SENSOR_ENABLED)
197 cl_data->sensor_sts[i] = SENSOR_DISABLED;
198 dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n",
199 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
200 cl_data->sensor_sts[i]);
201 }
202 }
203
204 cancel_delayed_work_sync(&cl_data->work_buffer);
205 amd_sfh_clear_intr(mp2);
206 }
207
amd_sfh_hid_client_init(struct amd_mp2_dev * privdata)208 int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
209 {
210 struct amd_input_data *in_data = &privdata->in_data;
211 struct amdtp_cl_data *cl_data = privdata->cl_data;
212 struct amd_mp2_ops *mp2_ops = privdata->mp2_ops;
213 struct amd_mp2_sensor_info info;
214 struct request_list *req_list;
215 struct device *dev;
216 u32 feature_report_size;
217 u32 input_report_size;
218 int rc, i;
219 u8 cl_idx;
220
221 req_list = &cl_data->req_list;
222 dev = &privdata->pdev->dev;
223 amd_sfh_set_desc_ops(mp2_ops);
224
225 mp2_ops->suspend = amd_sfh_suspend;
226 mp2_ops->resume = amd_sfh_resume;
227
228 cl_data->num_hid_devices = amd_mp2_get_sensor_num(privdata, &cl_data->sensor_idx[0]);
229 if (cl_data->num_hid_devices == 0)
230 return -ENODEV;
231 cl_data->is_any_sensor_enabled = false;
232
233 INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work);
234 INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer);
235 INIT_LIST_HEAD(&req_list->list);
236 cl_data->in_data = in_data;
237
238 for (i = 0; i < cl_data->num_hid_devices; i++) {
239 in_data->sensor_virt_addr[i] = dmam_alloc_coherent(dev, sizeof(int) * 8,
240 &cl_data->sensor_dma_addr[i],
241 GFP_KERNEL);
242 if (!in_data->sensor_virt_addr[i]) {
243 rc = -ENOMEM;
244 goto cleanup;
245 }
246 cl_data->sensor_sts[i] = SENSOR_DISABLED;
247 cl_data->sensor_requested_cnt[i] = 0;
248 cl_data->cur_hid_dev = i;
249 cl_idx = cl_data->sensor_idx[i];
250 cl_data->report_descr_sz[i] = mp2_ops->get_desc_sz(cl_idx, descr_size);
251 if (!cl_data->report_descr_sz[i]) {
252 rc = -EINVAL;
253 goto cleanup;
254 }
255 feature_report_size = mp2_ops->get_desc_sz(cl_idx, feature_size);
256 if (!feature_report_size) {
257 rc = -EINVAL;
258 goto cleanup;
259 }
260 input_report_size = mp2_ops->get_desc_sz(cl_idx, input_size);
261 if (!input_report_size) {
262 rc = -EINVAL;
263 goto cleanup;
264 }
265 cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL);
266 if (!cl_data->feature_report[i]) {
267 rc = -ENOMEM;
268 goto cleanup;
269 }
270 in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL);
271 if (!in_data->input_report[i]) {
272 rc = -ENOMEM;
273 goto cleanup;
274 }
275 info.period = AMD_SFH_IDLE_LOOP;
276 info.sensor_idx = cl_idx;
277 info.dma_address = cl_data->sensor_dma_addr[i];
278
279 cl_data->report_descr[i] =
280 devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL);
281 if (!cl_data->report_descr[i]) {
282 rc = -ENOMEM;
283 goto cleanup;
284 }
285 rc = mp2_ops->get_rep_desc(cl_idx, cl_data->report_descr[i]);
286 if (rc)
287 goto cleanup;
288 mp2_ops->start(privdata, info);
289 cl_data->sensor_sts[i] = amd_sfh_wait_for_response
290 (privdata, cl_data->sensor_idx[i], SENSOR_ENABLED);
291
292 if (cl_data->sensor_sts[i] == SENSOR_ENABLED)
293 cl_data->is_any_sensor_enabled = true;
294 }
295
296 if (!cl_data->is_any_sensor_enabled ||
297 (mp2_ops->discovery_status && mp2_ops->discovery_status(privdata) == 0)) {
298 dev_warn(dev, "Failed to discover, sensors not enabled is %d\n",
299 cl_data->is_any_sensor_enabled);
300 rc = -EOPNOTSUPP;
301 goto cleanup;
302 }
303
304 for (i = 0; i < cl_data->num_hid_devices; i++) {
305 cl_data->cur_hid_dev = i;
306 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
307 rc = amdtp_hid_probe(i, cl_data);
308 if (rc)
309 goto cleanup;
310 } else {
311 cl_data->sensor_sts[i] = SENSOR_DISABLED;
312 }
313 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
314 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
315 cl_data->sensor_sts[i]);
316 }
317
318 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
319 return 0;
320
321 cleanup:
322 amd_sfh_hid_client_deinit(privdata);
323 for (i = 0; i < cl_data->num_hid_devices; i++) {
324 devm_kfree(dev, cl_data->feature_report[i]);
325 devm_kfree(dev, in_data->input_report[i]);
326 devm_kfree(dev, cl_data->report_descr[i]);
327 }
328 return rc;
329 }
330
amd_sfh_hid_client_deinit(struct amd_mp2_dev * privdata)331 int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata)
332 {
333 struct amdtp_cl_data *cl_data = privdata->cl_data;
334 int i, status;
335
336 for (i = 0; i < cl_data->num_hid_devices; i++) {
337 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
338 privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
339 status = amd_sfh_wait_for_response
340 (privdata, cl_data->sensor_idx[i], SENSOR_DISABLED);
341 if (status != SENSOR_ENABLED)
342 cl_data->sensor_sts[i] = SENSOR_DISABLED;
343 dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x (%s) status 0x%x\n",
344 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
345 cl_data->sensor_sts[i]);
346 }
347 }
348
349 cancel_delayed_work_sync(&cl_data->work);
350 cancel_delayed_work_sync(&cl_data->work_buffer);
351 amdtp_hid_remove(cl_data);
352
353 return 0;
354 }
355