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
21void 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
37int 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(size: 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: &new->list, head: &req_list->list);
59 break;
60 }
61 }
62 schedule_delayed_work(dwork: &cli_data->work, delay: 0);
63 return 0;
64}
65
66void 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(entry: &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(objp: 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(hid: cli_data->hid_sensor_hubs[current_index],
93 type: cli_data->report_type[current_index],
94 data: cli_data->feature_report[current_index], size: report_size, interrupt: 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(hid: cli_data->hid_sensor_hubs[current_index],
102 type: cli_data->report_type[current_index],
103 data: in_data->input_report[current_index], size: report_size, interrupt: 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(hid: cli_data->hid_sensor_hubs[current_index]);
110}
111
112void 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(hid: cli_data->hid_sensor_hubs[i], type: HID_INPUT_REPORT,
126 data: in_data->input_report[i], size: report_size, interrupt: 0);
127 }
128 }
129 schedule_delayed_work(dwork: &cli_data->work_buffer, delay: msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
130}
131
132static 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
140static 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
159static 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, sid: 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(dwork: &cl_data->work_buffer, delay: msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
182 amd_sfh_clear_intr(privdata: mp2);
183}
184
185static 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, sid: 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(dwork: &cl_data->work_buffer);
205 amd_sfh_clear_intr(privdata: mp2);
206}
207
208int 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, sensor_id: &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(list: &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] = dma_alloc_coherent(dev, size: sizeof(int) * 8,
240 dma_handle: &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, size: 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, size: 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, size: 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 (mp2: privdata, sid: cl_data->sensor_idx[i], SENSOR_ENABLED);
291 }
292
293 for (i = 0; i < cl_data->num_hid_devices; i++) {
294 cl_data->cur_hid_dev = i;
295 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
296 cl_data->is_any_sensor_enabled = true;
297 rc = amdtp_hid_probe(cur_hid_dev: i, cli_data: cl_data);
298 if (rc)
299 goto cleanup;
300 } else {
301 cl_data->sensor_sts[i] = SENSOR_DISABLED;
302 }
303 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
304 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
305 cl_data->sensor_sts[i]);
306 }
307
308 if (!cl_data->is_any_sensor_enabled ||
309 (mp2_ops->discovery_status && mp2_ops->discovery_status(privdata) == 0)) {
310 dev_warn(dev, "Failed to discover, sensors not enabled is %d\n", cl_data->is_any_sensor_enabled);
311 rc = -EOPNOTSUPP;
312 goto cleanup;
313 }
314 schedule_delayed_work(dwork: &cl_data->work_buffer, delay: msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
315 return 0;
316
317cleanup:
318 amd_sfh_hid_client_deinit(privdata);
319 for (i = 0; i < cl_data->num_hid_devices; i++) {
320 devm_kfree(dev, p: cl_data->feature_report[i]);
321 devm_kfree(dev, p: in_data->input_report[i]);
322 devm_kfree(dev, p: cl_data->report_descr[i]);
323 }
324 return rc;
325}
326
327int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata)
328{
329 struct amdtp_cl_data *cl_data = privdata->cl_data;
330 struct amd_input_data *in_data = cl_data->in_data;
331 int i, status;
332
333 for (i = 0; i < cl_data->num_hid_devices; i++) {
334 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
335 privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
336 status = amd_sfh_wait_for_response
337 (mp2: privdata, sid: cl_data->sensor_idx[i], SENSOR_DISABLED);
338 if (status != SENSOR_ENABLED)
339 cl_data->sensor_sts[i] = SENSOR_DISABLED;
340 dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x (%s) status 0x%x\n",
341 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
342 cl_data->sensor_sts[i]);
343 }
344 }
345
346 cancel_delayed_work_sync(dwork: &cl_data->work);
347 cancel_delayed_work_sync(dwork: &cl_data->work_buffer);
348 amdtp_hid_remove(cli_data: cl_data);
349
350 for (i = 0; i < cl_data->num_hid_devices; i++) {
351 if (in_data->sensor_virt_addr[i]) {
352 dma_free_coherent(dev: &privdata->pdev->dev, size: 8 * sizeof(int),
353 cpu_addr: in_data->sensor_virt_addr[i],
354 dma_handle: cl_data->sensor_dma_addr[i]);
355 }
356 }
357 return 0;
358}
359

source code of linux/drivers/hid/amd-sfh-hid/amd_sfh_client.c