1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * AMD MP2 1.1 communication driver
4 *
5 * Copyright (c) 2022, Advanced Micro Devices, Inc.
6 * All Rights Reserved.
7 *
8 * Author: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
9 */
10
11 #include <linux/delay.h>
12 #include <linux/hid.h>
13
14 #include "amd_sfh_init.h"
15 #include "amd_sfh_interface.h"
16 #include "../hid_descriptor/amd_sfh_hid_desc.h"
17
amd_sfh_get_sensor_num(struct amd_mp2_dev * mp2,u8 * sensor_id)18 static int amd_sfh_get_sensor_num(struct amd_mp2_dev *mp2, u8 *sensor_id)
19 {
20 struct sfh_sensor_list *slist;
21 struct sfh_base_info binfo;
22 int num_of_sensors = 0;
23 int i;
24
25 memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info));
26 slist = &binfo.sbase.s_list;
27
28 for (i = 0; i < MAX_IDX; i++) {
29 switch (i) {
30 case ACCEL_IDX:
31 case GYRO_IDX:
32 case MAG_IDX:
33 case SRA_IDX:
34 case ALS_IDX:
35 case HPD_IDX:
36 if (BIT(i) & slist->sl.sensors)
37 sensor_id[num_of_sensors++] = i;
38 break;
39 }
40 }
41
42 return num_of_sensors;
43 }
44
amd_sfh_wait_for_response(struct amd_mp2_dev * mp2,u8 sid,u32 cmd_id)45 static u32 amd_sfh_wait_for_response(struct amd_mp2_dev *mp2, u8 sid, u32 cmd_id)
46 {
47 if (mp2->mp2_ops->response)
48 return mp2->mp2_ops->response(mp2, sid, cmd_id);
49
50 return 0;
51 }
52
get_sensor_name(int idx)53 static const char *get_sensor_name(int idx)
54 {
55 switch (idx) {
56 case ACCEL_IDX:
57 return "accelerometer";
58 case GYRO_IDX:
59 return "gyroscope";
60 case MAG_IDX:
61 return "magnetometer";
62 case SRA_IDX:
63 return "SRA";
64 case ALS_IDX:
65 return "ALS";
66 case HPD_IDX:
67 return "HPD";
68 default:
69 return "unknown sensor type";
70 }
71 }
72
amd_sfh_hid_client_deinit(struct amd_mp2_dev * privdata)73 static int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata)
74 {
75 struct amdtp_cl_data *cl_data = privdata->cl_data;
76 int i, status;
77
78 for (i = 0; i < cl_data->num_hid_devices; i++) {
79 switch (cl_data->sensor_idx[i]) {
80 case HPD_IDX:
81 privdata->dev_en.is_hpd_present = false;
82 break;
83 case ALS_IDX:
84 privdata->dev_en.is_als_present = false;
85 break;
86 case SRA_IDX:
87 privdata->dev_en.is_sra_present = false;
88 break;
89 }
90
91 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
92 privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
93 status = amd_sfh_wait_for_response
94 (privdata, cl_data->sensor_idx[i], DISABLE_SENSOR);
95 if (status == 0)
96 cl_data->sensor_sts[i] = SENSOR_DISABLED;
97 dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x (%s) status 0x%x\n",
98 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
99 cl_data->sensor_sts[i]);
100 }
101 }
102
103 cancel_delayed_work_sync(&cl_data->work);
104 cancel_delayed_work_sync(&cl_data->work_buffer);
105 amdtp_hid_remove(cl_data);
106
107 return 0;
108 }
109
amd_sfh1_1_hid_client_init(struct amd_mp2_dev * privdata)110 static int amd_sfh1_1_hid_client_init(struct amd_mp2_dev *privdata)
111 {
112 struct amd_input_data *in_data = &privdata->in_data;
113 struct amdtp_cl_data *cl_data = privdata->cl_data;
114 struct amd_mp2_ops *mp2_ops = privdata->mp2_ops;
115 struct amd_mp2_sensor_info info;
116 struct request_list *req_list;
117 u32 feature_report_size;
118 u32 input_report_size;
119 struct device *dev;
120 int rc, i, status;
121 u8 cl_idx;
122
123 req_list = &cl_data->req_list;
124 dev = &privdata->pdev->dev;
125 amd_sfh1_1_set_desc_ops(mp2_ops);
126
127 cl_data->num_hid_devices = amd_sfh_get_sensor_num(privdata, &cl_data->sensor_idx[0]);
128 if (cl_data->num_hid_devices == 0)
129 return -ENODEV;
130 cl_data->is_any_sensor_enabled = false;
131
132 INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work);
133 INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer);
134 INIT_LIST_HEAD(&req_list->list);
135 cl_data->in_data = in_data;
136
137 for (i = 0; i < cl_data->num_hid_devices; i++) {
138 cl_data->sensor_sts[i] = SENSOR_DISABLED;
139
140 if (cl_data->sensor_idx[i] == SRA_IDX) {
141 info.sensor_idx = cl_data->sensor_idx[i];
142 writel(0, privdata->mmio + amd_get_p2c_val(privdata, 0));
143 mp2_ops->start(privdata, info);
144 status = amd_sfh_wait_for_response
145 (privdata, cl_data->sensor_idx[i], ENABLE_SENSOR);
146
147 cl_data->sensor_sts[i] = (status == 0) ? SENSOR_ENABLED : SENSOR_DISABLED;
148 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
149 cl_data->is_any_sensor_enabled = true;
150 privdata->dev_en.is_sra_present = true;
151 }
152 continue;
153 }
154
155 cl_data->sensor_requested_cnt[i] = 0;
156 cl_data->cur_hid_dev = i;
157 cl_idx = cl_data->sensor_idx[i];
158
159 cl_data->report_descr_sz[i] = mp2_ops->get_desc_sz(cl_idx, descr_size);
160 if (!cl_data->report_descr_sz[i]) {
161 rc = -EINVAL;
162 goto cleanup;
163 }
164 feature_report_size = mp2_ops->get_desc_sz(cl_idx, feature_size);
165 if (!feature_report_size) {
166 rc = -EINVAL;
167 goto cleanup;
168 }
169 input_report_size = mp2_ops->get_desc_sz(cl_idx, input_size);
170 if (!input_report_size) {
171 rc = -EINVAL;
172 goto cleanup;
173 }
174 cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL);
175 if (!cl_data->feature_report[i]) {
176 rc = -ENOMEM;
177 goto cleanup;
178 }
179 in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL);
180 if (!in_data->input_report[i]) {
181 rc = -ENOMEM;
182 goto cleanup;
183 }
184
185 info.sensor_idx = cl_idx;
186
187 cl_data->report_descr[i] =
188 devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL);
189 if (!cl_data->report_descr[i]) {
190 rc = -ENOMEM;
191 goto cleanup;
192 }
193 rc = mp2_ops->get_rep_desc(cl_idx, cl_data->report_descr[i]);
194 if (rc)
195 goto cleanup;
196
197 writel(0, privdata->mmio + amd_get_p2c_val(privdata, 0));
198 mp2_ops->start(privdata, info);
199 status = amd_sfh_wait_for_response
200 (privdata, cl_data->sensor_idx[i], ENABLE_SENSOR);
201
202 cl_data->sensor_sts[i] = (status == 0) ? SENSOR_ENABLED : SENSOR_DISABLED;
203 }
204
205 for (i = 0; i < cl_data->num_hid_devices; i++) {
206 if (cl_data->sensor_idx[i] == SRA_IDX)
207 continue;
208 cl_data->cur_hid_dev = i;
209 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
210 cl_data->is_any_sensor_enabled = true;
211 rc = amdtp_hid_probe(i, cl_data);
212 if (rc)
213 goto cleanup;
214 switch (cl_data->sensor_idx[i]) {
215 case HPD_IDX:
216 privdata->dev_en.is_hpd_present = true;
217 privdata->dev_en.is_hpd_enabled = true;
218 amd_sfh_toggle_hpd(privdata, false);
219 break;
220 case ALS_IDX:
221 privdata->dev_en.is_als_present = true;
222 break;
223 }
224 }
225 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
226 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
227 cl_data->sensor_sts[i]);
228 }
229
230 if (!cl_data->is_any_sensor_enabled) {
231 dev_warn(dev, "No sensor registered, sensors not enabled is %d\n",
232 cl_data->is_any_sensor_enabled);
233 rc = -EOPNOTSUPP;
234 goto cleanup;
235 }
236
237 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
238 return 0;
239
240 cleanup:
241 amd_sfh_hid_client_deinit(privdata);
242 for (i = 0; i < cl_data->num_hid_devices; i++) {
243 if (cl_data->sensor_idx[i] == SRA_IDX)
244 continue;
245 devm_kfree(dev, cl_data->feature_report[i]);
246 devm_kfree(dev, in_data->input_report[i]);
247 devm_kfree(dev, cl_data->report_descr[i]);
248 }
249 return rc;
250 }
251
amd_sfh_resume(struct amd_mp2_dev * mp2)252 static void amd_sfh_resume(struct amd_mp2_dev *mp2)
253 {
254 struct amdtp_cl_data *cl_data = mp2->cl_data;
255 struct amd_mp2_sensor_info info;
256 int i, status;
257
258 if (!cl_data->is_any_sensor_enabled) {
259 amd_sfh_clear_intr(mp2);
260 return;
261 }
262
263 for (i = 0; i < cl_data->num_hid_devices; i++) {
264 /* leave HPD alone; policy is controlled by sysfs */
265 if (cl_data->sensor_idx[i] == HPD_IDX)
266 continue;
267
268 if (cl_data->sensor_sts[i] == SENSOR_DISABLED) {
269 info.sensor_idx = cl_data->sensor_idx[i];
270 mp2->mp2_ops->start(mp2, info);
271 status = amd_sfh_wait_for_response
272 (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR);
273 if (status == 0)
274 status = SENSOR_ENABLED;
275 if (status == SENSOR_ENABLED)
276 cl_data->sensor_sts[i] = SENSOR_ENABLED;
277 dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n",
278 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
279 cl_data->sensor_sts[i]);
280 }
281 }
282
283 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
284 amd_sfh_clear_intr(mp2);
285 }
286
amd_sfh_suspend(struct amd_mp2_dev * mp2)287 static void amd_sfh_suspend(struct amd_mp2_dev *mp2)
288 {
289 struct amdtp_cl_data *cl_data = mp2->cl_data;
290 int i, status;
291
292 if (!cl_data->is_any_sensor_enabled) {
293 amd_sfh_clear_intr(mp2);
294 return;
295 }
296
297 for (i = 0; i < cl_data->num_hid_devices; i++) {
298 /* leave HPD alone; policy is controlled by sysfs */
299 if (cl_data->sensor_idx[i] == HPD_IDX)
300 continue;
301 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
302 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
303 status = amd_sfh_wait_for_response
304 (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR);
305 if (status == 0)
306 status = SENSOR_DISABLED;
307 if (status != SENSOR_ENABLED)
308 cl_data->sensor_sts[i] = SENSOR_DISABLED;
309 dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n",
310 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
311 cl_data->sensor_sts[i]);
312 }
313 }
314
315 cancel_delayed_work_sync(&cl_data->work_buffer);
316 amd_sfh_clear_intr(mp2);
317 }
318
amd_sfh_toggle_hpd(struct amd_mp2_dev * mp2,bool enabled)319 void amd_sfh_toggle_hpd(struct amd_mp2_dev *mp2, bool enabled)
320 {
321 struct amdtp_cl_data *cl_data = mp2->cl_data;
322 struct amd_mp2_sensor_info info;
323 int i, status;
324
325 if (mp2->dev_en.is_hpd_enabled == enabled)
326 return;
327
328 for (i = 0; i < cl_data->num_hid_devices; i++) {
329 if (cl_data->sensor_idx[i] != HPD_IDX)
330 continue;
331 info.sensor_idx = cl_data->sensor_idx[i];
332 if (enabled) {
333 mp2->mp2_ops->start(mp2, info);
334 status = amd_sfh_wait_for_response
335 (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR);
336 if (status == 0)
337 status = SENSOR_ENABLED;
338 if (status == SENSOR_ENABLED)
339 cl_data->sensor_sts[i] = SENSOR_ENABLED;
340 } else {
341 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
342 status = amd_sfh_wait_for_response
343 (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR);
344 if (status == 0)
345 status = SENSOR_DISABLED;
346 if (status != SENSOR_ENABLED)
347 cl_data->sensor_sts[i] = SENSOR_DISABLED;
348 }
349 dev_dbg(&mp2->pdev->dev, "toggle sid 0x%x (%s) status 0x%x\n",
350 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
351 cl_data->sensor_sts[i]);
352 break;
353 }
354 mp2->dev_en.is_hpd_enabled = enabled;
355 }
356
amd_mp2_pci_remove(void * privdata)357 static void amd_mp2_pci_remove(void *privdata)
358 {
359 struct amd_mp2_dev *mp2 = privdata;
360
361 sfh_deinit_emp2();
362 amd_sfh_hid_client_deinit(privdata);
363 mp2->mp2_ops->stop_all(mp2);
364 pcim_intx(mp2->pdev, false);
365 amd_sfh_clear_intr(mp2);
366 }
367
amd_sfh_set_ops(struct amd_mp2_dev * mp2)368 static void amd_sfh_set_ops(struct amd_mp2_dev *mp2)
369 {
370 struct amd_mp2_ops *mp2_ops;
371
372 sfh_interface_init(mp2);
373 mp2_ops = mp2->mp2_ops;
374 mp2_ops->clear_intr = amd_sfh_clear_intr_v2;
375 mp2_ops->init_intr = amd_sfh_irq_init_v2;
376 mp2_ops->suspend = amd_sfh_suspend;
377 mp2_ops->resume = amd_sfh_resume;
378 mp2_ops->remove = amd_mp2_pci_remove;
379 }
380
amd_sfh1_1_init(struct amd_mp2_dev * mp2)381 int amd_sfh1_1_init(struct amd_mp2_dev *mp2)
382 {
383 u32 phy_base = readl(mp2->mmio + amd_get_c2p_val(mp2, 22));
384 struct device *dev = &mp2->pdev->dev;
385 struct sfh_base_info binfo;
386 int rc;
387
388 phy_base <<= 21;
389 if (!devm_request_mem_region(dev, phy_base, 128 * 1024, "amd_sfh")) {
390 dev_dbg(dev, "can't reserve mmio registers\n");
391 return -ENOMEM;
392 }
393
394 mp2->vsbase = devm_ioremap(dev, phy_base, 128 * 1024);
395 if (!mp2->vsbase) {
396 dev_dbg(dev, "failed to remap vsbase\n");
397 return -ENOMEM;
398 }
399
400 /* Before accessing give time for SFH firmware for processing configuration */
401 msleep(5000);
402
403 memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info));
404 if (binfo.sbase.fw_info.fw_ver == 0 || binfo.sbase.s_list.sl.sensors == 0) {
405 dev_dbg(dev, "No sensor registered\n");
406 return -EOPNOTSUPP;
407 }
408 dev_dbg(dev, "firmware version 0x%x\n", binfo.sbase.fw_info.fw_ver);
409
410 amd_sfh_set_ops(mp2);
411
412 rc = amd_sfh_irq_init(mp2);
413 if (rc) {
414 sfh_deinit_emp2();
415 dev_err(dev, "amd_sfh_irq_init failed\n");
416 return rc;
417 }
418
419 rc = amd_sfh1_1_hid_client_init(mp2);
420 if (rc) {
421 sfh_deinit_emp2();
422 if ((rc != -ENODEV) && (rc != -EOPNOTSUPP))
423 dev_err(dev, "amd_sfh1_1_hid_client_init failed\n");
424 return rc;
425 }
426
427 return rc;
428 }
429