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 return "ALS";
151 case HPD_IDX:
152 return "HPD";
153 default:
154 return "unknown sensor type";
155 }
156 }
157
amd_sfh_resume(struct amd_mp2_dev * mp2)158 static void amd_sfh_resume(struct amd_mp2_dev *mp2)
159 {
160 struct amdtp_cl_data *cl_data = mp2->cl_data;
161 struct amd_mp2_sensor_info info;
162 int i, status;
163
164 for (i = 0; i < cl_data->num_hid_devices; i++) {
165 if (cl_data->sensor_sts[i] == SENSOR_DISABLED) {
166 info.period = AMD_SFH_IDLE_LOOP;
167 info.sensor_idx = cl_data->sensor_idx[i];
168 info.dma_address = cl_data->sensor_dma_addr[i];
169 mp2->mp2_ops->start(mp2, info);
170 status = amd_sfh_wait_for_response
171 (mp2, cl_data->sensor_idx[i], SENSOR_ENABLED);
172 if (status == SENSOR_ENABLED)
173 cl_data->sensor_sts[i] = SENSOR_ENABLED;
174 dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n",
175 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
176 cl_data->sensor_sts[i]);
177 }
178 }
179
180 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
181 amd_sfh_clear_intr(mp2);
182 }
183
amd_sfh_suspend(struct amd_mp2_dev * mp2)184 static void amd_sfh_suspend(struct amd_mp2_dev *mp2)
185 {
186 struct amdtp_cl_data *cl_data = mp2->cl_data;
187 int i, status;
188
189 for (i = 0; i < cl_data->num_hid_devices; i++) {
190 if (cl_data->sensor_idx[i] != HPD_IDX &&
191 cl_data->sensor_sts[i] == SENSOR_ENABLED) {
192 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
193 status = amd_sfh_wait_for_response
194 (mp2, cl_data->sensor_idx[i], SENSOR_DISABLED);
195 if (status != SENSOR_ENABLED)
196 cl_data->sensor_sts[i] = SENSOR_DISABLED;
197 dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n",
198 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
199 cl_data->sensor_sts[i]);
200 }
201 }
202
203 cancel_delayed_work_sync(&cl_data->work_buffer);
204 amd_sfh_clear_intr(mp2);
205 }
206
amd_sfh_hid_client_init(struct amd_mp2_dev * privdata)207 int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
208 {
209 struct amd_input_data *in_data = &privdata->in_data;
210 struct amdtp_cl_data *cl_data = privdata->cl_data;
211 struct amd_mp2_ops *mp2_ops = privdata->mp2_ops;
212 struct amd_mp2_sensor_info info;
213 struct request_list *req_list;
214 struct device *dev;
215 u32 feature_report_size;
216 u32 input_report_size;
217 int rc, i, status;
218 u8 cl_idx;
219
220 req_list = &cl_data->req_list;
221 dev = &privdata->pdev->dev;
222 amd_sfh_set_desc_ops(mp2_ops);
223
224 mp2_ops->suspend = amd_sfh_suspend;
225 mp2_ops->resume = amd_sfh_resume;
226
227 cl_data->num_hid_devices = amd_mp2_get_sensor_num(privdata, &cl_data->sensor_idx[0]);
228 if (cl_data->num_hid_devices == 0)
229 return -ENODEV;
230 cl_data->is_any_sensor_enabled = false;
231
232 INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work);
233 INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer);
234 INIT_LIST_HEAD(&req_list->list);
235 cl_data->in_data = in_data;
236
237 for (i = 0; i < cl_data->num_hid_devices; i++) {
238 in_data->sensor_virt_addr[i] = dma_alloc_coherent(dev, sizeof(int) * 8,
239 &cl_data->sensor_dma_addr[i],
240 GFP_KERNEL);
241 if (!in_data->sensor_virt_addr[i]) {
242 rc = -ENOMEM;
243 goto cleanup;
244 }
245 cl_data->sensor_sts[i] = SENSOR_DISABLED;
246 cl_data->sensor_requested_cnt[i] = 0;
247 cl_data->cur_hid_dev = i;
248 cl_idx = cl_data->sensor_idx[i];
249 cl_data->report_descr_sz[i] = mp2_ops->get_desc_sz(cl_idx, descr_size);
250 if (!cl_data->report_descr_sz[i]) {
251 rc = -EINVAL;
252 goto cleanup;
253 }
254 feature_report_size = mp2_ops->get_desc_sz(cl_idx, feature_size);
255 if (!feature_report_size) {
256 rc = -EINVAL;
257 goto cleanup;
258 }
259 input_report_size = mp2_ops->get_desc_sz(cl_idx, input_size);
260 if (!input_report_size) {
261 rc = -EINVAL;
262 goto cleanup;
263 }
264 cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL);
265 if (!cl_data->feature_report[i]) {
266 rc = -ENOMEM;
267 goto cleanup;
268 }
269 in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL);
270 if (!in_data->input_report[i]) {
271 rc = -ENOMEM;
272 goto cleanup;
273 }
274 info.period = AMD_SFH_IDLE_LOOP;
275 info.sensor_idx = cl_idx;
276 info.dma_address = cl_data->sensor_dma_addr[i];
277
278 cl_data->report_descr[i] =
279 devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL);
280 if (!cl_data->report_descr[i]) {
281 rc = -ENOMEM;
282 goto cleanup;
283 }
284 rc = mp2_ops->get_rep_desc(cl_idx, cl_data->report_descr[i]);
285 if (rc)
286 goto cleanup;
287 mp2_ops->start(privdata, info);
288 status = amd_sfh_wait_for_response
289 (privdata, cl_data->sensor_idx[i], SENSOR_ENABLED);
290 if (status == SENSOR_ENABLED) {
291 cl_data->is_any_sensor_enabled = true;
292 cl_data->sensor_sts[i] = SENSOR_ENABLED;
293 rc = amdtp_hid_probe(cl_data->cur_hid_dev, cl_data);
294 if (rc) {
295 mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
296 status = amd_sfh_wait_for_response
297 (privdata, cl_data->sensor_idx[i], SENSOR_DISABLED);
298 if (status != SENSOR_ENABLED)
299 cl_data->sensor_sts[i] = SENSOR_DISABLED;
300 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
301 cl_data->sensor_idx[i],
302 get_sensor_name(cl_data->sensor_idx[i]),
303 cl_data->sensor_sts[i]);
304 goto cleanup;
305 }
306 } else {
307 cl_data->sensor_sts[i] = SENSOR_DISABLED;
308 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
309 cl_data->sensor_idx[i],
310 get_sensor_name(cl_data->sensor_idx[i]),
311 cl_data->sensor_sts[i]);
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 if (!cl_data->is_any_sensor_enabled ||
318 (mp2_ops->discovery_status && mp2_ops->discovery_status(privdata) == 0)) {
319 amd_sfh_hid_client_deinit(privdata);
320 for (i = 0; i < cl_data->num_hid_devices; i++) {
321 devm_kfree(dev, cl_data->feature_report[i]);
322 devm_kfree(dev, in_data->input_report[i]);
323 devm_kfree(dev, cl_data->report_descr[i]);
324 }
325 dev_warn(dev, "Failed to discover, sensors not enabled is %d\n", cl_data->is_any_sensor_enabled);
326 return -EOPNOTSUPP;
327 }
328 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
329 return 0;
330
331 cleanup:
332 for (i = 0; i < cl_data->num_hid_devices; i++) {
333 if (in_data->sensor_virt_addr[i]) {
334 dma_free_coherent(&privdata->pdev->dev, 8 * sizeof(int),
335 in_data->sensor_virt_addr[i],
336 cl_data->sensor_dma_addr[i]);
337 }
338 devm_kfree(dev, cl_data->feature_report[i]);
339 devm_kfree(dev, in_data->input_report[i]);
340 devm_kfree(dev, cl_data->report_descr[i]);
341 }
342 return rc;
343 }
344
amd_sfh_hid_client_deinit(struct amd_mp2_dev * privdata)345 int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata)
346 {
347 struct amdtp_cl_data *cl_data = privdata->cl_data;
348 struct amd_input_data *in_data = cl_data->in_data;
349 int i, status;
350
351 for (i = 0; i < cl_data->num_hid_devices; i++) {
352 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
353 privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
354 status = amd_sfh_wait_for_response
355 (privdata, cl_data->sensor_idx[i], SENSOR_DISABLED);
356 if (status != SENSOR_ENABLED)
357 cl_data->sensor_sts[i] = SENSOR_DISABLED;
358 dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x (%s) status 0x%x\n",
359 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
360 cl_data->sensor_sts[i]);
361 }
362 }
363
364 cancel_delayed_work_sync(&cl_data->work);
365 cancel_delayed_work_sync(&cl_data->work_buffer);
366 amdtp_hid_remove(cl_data);
367
368 for (i = 0; i < cl_data->num_hid_devices; i++) {
369 if (in_data->sensor_virt_addr[i]) {
370 dma_free_coherent(&privdata->pdev->dev, 8 * sizeof(int),
371 in_data->sensor_virt_addr[i],
372 cl_data->sensor_dma_addr[i]);
373 }
374 }
375 return 0;
376 }
377