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 op_idx:
150 return "operating-mode";
151 case als_idx:
152 case ACS_IDX: /* ambient color sensor */
153 return "ALS";
154 case HPD_IDX:
155 return "HPD";
156 default:
157 return "unknown sensor type";
158 }
159 }
160
amd_sfh_resume(struct amd_mp2_dev * mp2)161 static void amd_sfh_resume(struct amd_mp2_dev *mp2)
162 {
163 struct amdtp_cl_data *cl_data = mp2->cl_data;
164 struct amd_mp2_sensor_info info;
165 int i, status;
166
167 for (i = 0; i < cl_data->num_hid_devices; i++) {
168 if (cl_data->sensor_sts[i] == SENSOR_DISABLED) {
169 info.period = AMD_SFH_IDLE_LOOP;
170 info.sensor_idx = cl_data->sensor_idx[i];
171 info.dma_address = cl_data->sensor_dma_addr[i];
172 mp2->mp2_ops->start(mp2, info);
173 status = amd_sfh_wait_for_response
174 (mp2, cl_data->sensor_idx[i], SENSOR_ENABLED);
175 if (status == SENSOR_ENABLED)
176 cl_data->sensor_sts[i] = SENSOR_ENABLED;
177 dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n",
178 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
179 cl_data->sensor_sts[i]);
180 }
181 }
182
183 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
184 amd_sfh_clear_intr(mp2);
185 }
186
amd_sfh_suspend(struct amd_mp2_dev * mp2)187 static void amd_sfh_suspend(struct amd_mp2_dev *mp2)
188 {
189 struct amdtp_cl_data *cl_data = mp2->cl_data;
190 int i, status;
191
192 for (i = 0; i < cl_data->num_hid_devices; i++) {
193 if (cl_data->sensor_idx[i] != HPD_IDX &&
194 cl_data->sensor_sts[i] == SENSOR_ENABLED) {
195 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
196 status = amd_sfh_wait_for_response
197 (mp2, cl_data->sensor_idx[i], SENSOR_DISABLED);
198 if (status != SENSOR_ENABLED)
199 cl_data->sensor_sts[i] = SENSOR_DISABLED;
200 dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n",
201 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
202 cl_data->sensor_sts[i]);
203 }
204 }
205
206 cancel_delayed_work_sync(&cl_data->work_buffer);
207 amd_sfh_clear_intr(mp2);
208 }
209
amd_sfh_hid_client_init(struct amd_mp2_dev * privdata)210 int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
211 {
212 struct amd_input_data *in_data = &privdata->in_data;
213 struct amdtp_cl_data *cl_data = privdata->cl_data;
214 struct amd_mp2_ops *mp2_ops = privdata->mp2_ops;
215 struct amd_mp2_sensor_info info;
216 struct request_list *req_list;
217 struct device *dev;
218 u32 feature_report_size;
219 u32 input_report_size;
220 int rc, i;
221 u8 cl_idx;
222
223 req_list = &cl_data->req_list;
224 dev = &privdata->pdev->dev;
225 amd_sfh_set_desc_ops(mp2_ops);
226
227 mp2_ops->suspend = amd_sfh_suspend;
228 mp2_ops->resume = amd_sfh_resume;
229
230 cl_data->num_hid_devices = amd_mp2_get_sensor_num(privdata, &cl_data->sensor_idx[0]);
231 if (cl_data->num_hid_devices == 0)
232 return -ENODEV;
233 cl_data->is_any_sensor_enabled = false;
234
235 INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work);
236 INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer);
237 INIT_LIST_HEAD(&req_list->list);
238 cl_data->in_data = in_data;
239
240 for (i = 0; i < cl_data->num_hid_devices; i++) {
241 in_data->sensor_virt_addr[i] = dmam_alloc_coherent(dev, sizeof(int) * 8,
242 &cl_data->sensor_dma_addr[i],
243 GFP_KERNEL);
244 if (!in_data->sensor_virt_addr[i]) {
245 rc = -ENOMEM;
246 goto cleanup;
247 }
248
249 if (cl_data->sensor_idx[i] == op_idx) {
250 info.period = AMD_SFH_IDLE_LOOP;
251 info.sensor_idx = cl_data->sensor_idx[i];
252 info.dma_address = cl_data->sensor_dma_addr[i];
253 mp2_ops->start(privdata, info);
254 cl_data->sensor_sts[i] = amd_sfh_wait_for_response(privdata,
255 cl_data->sensor_idx[i],
256 SENSOR_ENABLED);
257 if (cl_data->sensor_sts[i] == SENSOR_ENABLED)
258 cl_data->is_any_sensor_enabled = true;
259 continue;
260 }
261
262 cl_data->sensor_sts[i] = SENSOR_DISABLED;
263 cl_data->sensor_requested_cnt[i] = 0;
264 cl_data->cur_hid_dev = i;
265 cl_idx = cl_data->sensor_idx[i];
266 cl_data->report_descr_sz[i] = mp2_ops->get_desc_sz(cl_idx, descr_size);
267 if (!cl_data->report_descr_sz[i]) {
268 rc = -EINVAL;
269 goto cleanup;
270 }
271 feature_report_size = mp2_ops->get_desc_sz(cl_idx, feature_size);
272 if (!feature_report_size) {
273 rc = -EINVAL;
274 goto cleanup;
275 }
276 input_report_size = mp2_ops->get_desc_sz(cl_idx, input_size);
277 if (!input_report_size) {
278 rc = -EINVAL;
279 goto cleanup;
280 }
281 cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL);
282 if (!cl_data->feature_report[i]) {
283 rc = -ENOMEM;
284 goto cleanup;
285 }
286 in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL);
287 if (!in_data->input_report[i]) {
288 rc = -ENOMEM;
289 goto cleanup;
290 }
291 info.period = AMD_SFH_IDLE_LOOP;
292 info.sensor_idx = cl_idx;
293 info.dma_address = cl_data->sensor_dma_addr[i];
294
295 cl_data->report_descr[i] =
296 devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL);
297 if (!cl_data->report_descr[i]) {
298 rc = -ENOMEM;
299 goto cleanup;
300 }
301 rc = mp2_ops->get_rep_desc(cl_idx, cl_data->report_descr[i]);
302 if (rc)
303 goto cleanup;
304 mp2_ops->start(privdata, info);
305 cl_data->sensor_sts[i] = amd_sfh_wait_for_response
306 (privdata, cl_data->sensor_idx[i], SENSOR_ENABLED);
307
308 if (cl_data->sensor_sts[i] == SENSOR_ENABLED)
309 cl_data->is_any_sensor_enabled = true;
310 }
311
312 if (!cl_data->is_any_sensor_enabled ||
313 (mp2_ops->discovery_status && mp2_ops->discovery_status(privdata) == 0)) {
314 dev_warn(dev, "Failed to discover, sensors not enabled is %d\n",
315 cl_data->is_any_sensor_enabled);
316 rc = -EOPNOTSUPP;
317 goto cleanup;
318 }
319
320 for (i = 0; i < cl_data->num_hid_devices; i++) {
321 cl_data->cur_hid_dev = i;
322 if (cl_data->sensor_idx[i] == op_idx) {
323 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
324 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
325 cl_data->sensor_sts[i]);
326 continue;
327 }
328
329 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
330 rc = amdtp_hid_probe(i, cl_data);
331 if (rc)
332 goto cleanup;
333 } else {
334 cl_data->sensor_sts[i] = SENSOR_DISABLED;
335 }
336 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
337 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
338 cl_data->sensor_sts[i]);
339 }
340
341 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
342 return 0;
343
344 cleanup:
345 amd_sfh_hid_client_deinit(privdata);
346 for (i = 0; i < cl_data->num_hid_devices; i++) {
347 devm_kfree(dev, cl_data->feature_report[i]);
348 devm_kfree(dev, in_data->input_report[i]);
349 devm_kfree(dev, cl_data->report_descr[i]);
350 }
351 return rc;
352 }
353
amd_sfh_hid_client_deinit(struct amd_mp2_dev * privdata)354 int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata)
355 {
356 struct amdtp_cl_data *cl_data = privdata->cl_data;
357 int i, status;
358
359 for (i = 0; i < cl_data->num_hid_devices; i++) {
360 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
361 privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
362 status = amd_sfh_wait_for_response
363 (privdata, cl_data->sensor_idx[i], SENSOR_DISABLED);
364 if (status != SENSOR_ENABLED)
365 cl_data->sensor_sts[i] = SENSOR_DISABLED;
366 dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x (%s) status 0x%x\n",
367 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
368 cl_data->sensor_sts[i]);
369 }
370 }
371
372 cancel_delayed_work_sync(&cl_data->work);
373 cancel_delayed_work_sync(&cl_data->work_buffer);
374 amdtp_hid_remove(cl_data);
375
376 return 0;
377 }
378