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 struct amd_input_data *in_data = cli_data->in_data;
43 struct amd_mp2_dev *mp2;
44 int i;
45
46 mp2 = container_of(in_data, struct amd_mp2_dev, in_data);
47 guard(mutex)(&mp2->lock);
48 for (i = 0; i < cli_data->num_hid_devices; i++) {
49 if (cli_data->hid_sensor_hubs[i] == hid) {
50 struct request_list *new = kzalloc(sizeof(*new), GFP_KERNEL);
51
52 if (!new)
53 return -ENOMEM;
54
55 new->current_index = i;
56 new->sensor_idx = cli_data->sensor_idx[i];
57 new->hid = hid;
58 new->report_type = report_type;
59 new->report_id = report_id;
60 cli_data->report_id[i] = report_id;
61 cli_data->request_done[i] = false;
62 list_add(&new->list, &req_list->list);
63 break;
64 }
65 }
66 schedule_delayed_work(&cli_data->work, 0);
67 return 0;
68 }
69
amd_sfh_work(struct work_struct * work)70 void amd_sfh_work(struct work_struct *work)
71 {
72 struct amdtp_cl_data *cli_data = container_of(work, struct amdtp_cl_data, work.work);
73 struct request_list *req_list = &cli_data->req_list;
74 struct amd_input_data *in_data = cli_data->in_data;
75 struct request_list *req_node;
76 u8 current_index, sensor_index;
77 struct amd_mp2_ops *mp2_ops;
78 struct amd_mp2_dev *mp2;
79 u8 report_id, node_type;
80 u8 report_size = 0;
81
82 mp2 = container_of(in_data, struct amd_mp2_dev, in_data);
83 guard(mutex)(&mp2->lock);
84 req_node = list_last_entry(&req_list->list, struct request_list, list);
85 list_del(&req_node->list);
86 current_index = req_node->current_index;
87 sensor_index = req_node->sensor_idx;
88 report_id = req_node->report_id;
89 node_type = req_node->report_type;
90 kfree(req_node);
91
92 mp2_ops = mp2->mp2_ops;
93 if (node_type == HID_FEATURE_REPORT) {
94 report_size = mp2_ops->get_feat_rep(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 = mp2_ops->get_in_rep(current_index, sensor_index, report_id, in_data);
105 if (report_size)
106 hid_input_report(cli_data->hid_sensor_hubs[current_index],
107 cli_data->report_type[current_index],
108 in_data->input_report[current_index], report_size, 0);
109 else
110 pr_err("AMDSFH: Invalid report size\n");
111 }
112 cli_data->cur_hid_dev = current_index;
113 cli_data->sensor_requested_cnt[current_index] = 0;
114 amdtp_hid_wakeup(cli_data->hid_sensor_hubs[current_index]);
115 if (!list_empty(&req_list->list))
116 schedule_delayed_work(&cli_data->work, 0);
117 }
118
amd_sfh_work_buffer(struct work_struct * work)119 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 struct amd_input_data *in_data = cli_data->in_data;
123 struct amd_mp2_dev *mp2;
124 u8 report_size;
125 int i;
126
127 mp2 = container_of(in_data, struct amd_mp2_dev, in_data);
128 guard(mutex)(&mp2->lock);
129 for (i = 0; i < cli_data->num_hid_devices; i++) {
130 if (cli_data->sensor_sts[i] == SENSOR_ENABLED) {
131 report_size = mp2->mp2_ops->get_in_rep(i, cli_data->sensor_idx[i],
132 cli_data->report_id[i], in_data);
133 hid_input_report(cli_data->hid_sensor_hubs[i], HID_INPUT_REPORT,
134 in_data->input_report[i], report_size, 0);
135 }
136 }
137 schedule_delayed_work(&cli_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
138 }
139
amd_sfh_wait_for_response(struct amd_mp2_dev * mp2,u8 sid,u32 sensor_sts)140 static u32 amd_sfh_wait_for_response(struct amd_mp2_dev *mp2, u8 sid, u32 sensor_sts)
141 {
142 if (mp2->mp2_ops->response)
143 sensor_sts = mp2->mp2_ops->response(mp2, sid, sensor_sts);
144
145 return sensor_sts;
146 }
147
get_sensor_name(int idx)148 static const char *get_sensor_name(int idx)
149 {
150 switch (idx) {
151 case accel_idx:
152 return "accelerometer";
153 case gyro_idx:
154 return "gyroscope";
155 case mag_idx:
156 return "magnetometer";
157 case op_idx:
158 return "operating-mode";
159 case als_idx:
160 case ACS_IDX: /* ambient color sensor */
161 return "ALS";
162 case HPD_IDX:
163 return "HPD";
164 default:
165 return "unknown sensor type";
166 }
167 }
168
amd_sfh_resume(struct amd_mp2_dev * mp2)169 static void amd_sfh_resume(struct amd_mp2_dev *mp2)
170 {
171 struct amdtp_cl_data *cl_data = mp2->cl_data;
172 struct amd_mp2_sensor_info info;
173 int i, status;
174
175 for (i = 0; i < cl_data->num_hid_devices; i++) {
176 if (cl_data->sensor_sts[i] == SENSOR_DISABLED) {
177 info.period = AMD_SFH_IDLE_LOOP;
178 info.sensor_idx = cl_data->sensor_idx[i];
179 info.dma_address = cl_data->sensor_dma_addr[i];
180 mp2->mp2_ops->start(mp2, info);
181 status = amd_sfh_wait_for_response
182 (mp2, cl_data->sensor_idx[i], SENSOR_ENABLED);
183 if (status == SENSOR_ENABLED)
184 cl_data->sensor_sts[i] = SENSOR_ENABLED;
185 dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n",
186 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
187 cl_data->sensor_sts[i]);
188 }
189 }
190
191 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
192 amd_sfh_clear_intr(mp2);
193 }
194
amd_sfh_suspend(struct amd_mp2_dev * mp2)195 static void amd_sfh_suspend(struct amd_mp2_dev *mp2)
196 {
197 struct amdtp_cl_data *cl_data = mp2->cl_data;
198 int i, status;
199
200 for (i = 0; i < cl_data->num_hid_devices; i++) {
201 if (cl_data->sensor_idx[i] != HPD_IDX &&
202 cl_data->sensor_sts[i] == SENSOR_ENABLED) {
203 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
204 status = amd_sfh_wait_for_response
205 (mp2, cl_data->sensor_idx[i], SENSOR_DISABLED);
206 if (status != SENSOR_ENABLED)
207 cl_data->sensor_sts[i] = SENSOR_DISABLED;
208 dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n",
209 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
210 cl_data->sensor_sts[i]);
211 }
212 }
213
214 cancel_delayed_work_sync(&cl_data->work_buffer);
215 amd_sfh_clear_intr(mp2);
216 }
217
amd_sfh_hid_client_init(struct amd_mp2_dev * privdata)218 int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
219 {
220 struct amd_input_data *in_data = &privdata->in_data;
221 struct amdtp_cl_data *cl_data = privdata->cl_data;
222 struct amd_mp2_ops *mp2_ops = privdata->mp2_ops;
223 struct amd_mp2_sensor_info info;
224 struct request_list *req_list;
225 struct device *dev;
226 u32 feature_report_size;
227 u32 input_report_size;
228 int rc, i;
229 u8 cl_idx;
230
231 req_list = &cl_data->req_list;
232 dev = &privdata->pdev->dev;
233 amd_sfh_set_desc_ops(mp2_ops);
234
235 mp2_ops->suspend = amd_sfh_suspend;
236 mp2_ops->resume = amd_sfh_resume;
237
238 cl_data->num_hid_devices = amd_mp2_get_sensor_num(privdata, &cl_data->sensor_idx[0]);
239 if (cl_data->num_hid_devices == 0)
240 return -ENODEV;
241 cl_data->is_any_sensor_enabled = false;
242
243 INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work);
244 INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer);
245 INIT_LIST_HEAD(&req_list->list);
246 cl_data->in_data = in_data;
247
248 for (i = 0; i < cl_data->num_hid_devices; i++) {
249 in_data->sensor_virt_addr[i] = dmam_alloc_coherent(dev, sizeof(int) * 8,
250 &cl_data->sensor_dma_addr[i],
251 GFP_KERNEL);
252 if (!in_data->sensor_virt_addr[i]) {
253 rc = -ENOMEM;
254 goto cleanup;
255 }
256
257 if (cl_data->sensor_idx[i] == op_idx) {
258 info.period = AMD_SFH_IDLE_LOOP;
259 info.sensor_idx = cl_data->sensor_idx[i];
260 info.dma_address = cl_data->sensor_dma_addr[i];
261 mp2_ops->start(privdata, info);
262 cl_data->sensor_sts[i] = amd_sfh_wait_for_response(privdata,
263 cl_data->sensor_idx[i],
264 SENSOR_ENABLED);
265 if (cl_data->sensor_sts[i] == SENSOR_ENABLED)
266 cl_data->is_any_sensor_enabled = true;
267 continue;
268 }
269
270 cl_data->sensor_sts[i] = SENSOR_DISABLED;
271 cl_data->sensor_requested_cnt[i] = 0;
272 cl_data->cur_hid_dev = i;
273 cl_idx = cl_data->sensor_idx[i];
274 cl_data->report_descr_sz[i] = mp2_ops->get_desc_sz(cl_idx, descr_size);
275 if (!cl_data->report_descr_sz[i]) {
276 rc = -EINVAL;
277 goto cleanup;
278 }
279 feature_report_size = mp2_ops->get_desc_sz(cl_idx, feature_size);
280 if (!feature_report_size) {
281 rc = -EINVAL;
282 goto cleanup;
283 }
284 input_report_size = mp2_ops->get_desc_sz(cl_idx, input_size);
285 if (!input_report_size) {
286 rc = -EINVAL;
287 goto cleanup;
288 }
289 cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL);
290 if (!cl_data->feature_report[i]) {
291 rc = -ENOMEM;
292 goto cleanup;
293 }
294 in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL);
295 if (!in_data->input_report[i]) {
296 rc = -ENOMEM;
297 goto cleanup;
298 }
299 info.period = AMD_SFH_IDLE_LOOP;
300 info.sensor_idx = cl_idx;
301 info.dma_address = cl_data->sensor_dma_addr[i];
302
303 cl_data->report_descr[i] =
304 devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL);
305 if (!cl_data->report_descr[i]) {
306 rc = -ENOMEM;
307 goto cleanup;
308 }
309 rc = mp2_ops->get_rep_desc(cl_idx, cl_data->report_descr[i]);
310 if (rc)
311 goto cleanup;
312 mp2_ops->start(privdata, info);
313 cl_data->sensor_sts[i] = amd_sfh_wait_for_response
314 (privdata, cl_data->sensor_idx[i], SENSOR_ENABLED);
315
316 if (cl_data->sensor_sts[i] == SENSOR_ENABLED)
317 cl_data->is_any_sensor_enabled = true;
318 }
319
320 if (!cl_data->is_any_sensor_enabled ||
321 (mp2_ops->discovery_status && mp2_ops->discovery_status(privdata) == 0)) {
322 dev_warn(dev, "Failed to discover, sensors not enabled is %d\n",
323 cl_data->is_any_sensor_enabled);
324 rc = -EOPNOTSUPP;
325 goto cleanup;
326 }
327
328 for (i = 0; i < cl_data->num_hid_devices; i++) {
329 cl_data->cur_hid_dev = i;
330 if (cl_data->sensor_idx[i] == op_idx) {
331 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
332 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
333 cl_data->sensor_sts[i]);
334 continue;
335 }
336
337 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
338 rc = amdtp_hid_probe(i, cl_data);
339 if (rc)
340 goto cleanup;
341 } else {
342 cl_data->sensor_sts[i] = SENSOR_DISABLED;
343 }
344 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
345 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
346 cl_data->sensor_sts[i]);
347 }
348
349 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
350 return 0;
351
352 cleanup:
353 amd_sfh_hid_client_deinit(privdata);
354 for (i = 0; i < cl_data->num_hid_devices; i++) {
355 devm_kfree(dev, cl_data->feature_report[i]);
356 devm_kfree(dev, in_data->input_report[i]);
357 devm_kfree(dev, cl_data->report_descr[i]);
358 }
359 return rc;
360 }
361
amd_sfh_hid_client_deinit(struct amd_mp2_dev * privdata)362 int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata)
363 {
364 struct amdtp_cl_data *cl_data = privdata->cl_data;
365 int i, status;
366
367 for (i = 0; i < cl_data->num_hid_devices; i++) {
368 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
369 privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
370 status = amd_sfh_wait_for_response
371 (privdata, cl_data->sensor_idx[i], SENSOR_DISABLED);
372 if (status != SENSOR_ENABLED)
373 cl_data->sensor_sts[i] = SENSOR_DISABLED;
374 dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x (%s) status 0x%x\n",
375 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
376 cl_data->sensor_sts[i]);
377 }
378 }
379
380 cancel_delayed_work_sync(&cl_data->work);
381 cancel_delayed_work_sync(&cl_data->work_buffer);
382 amdtp_hid_remove(cl_data);
383
384 return 0;
385 }
386