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 mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
198 amd_sfh_wait_for_response(privdata, cl_data->sensor_idx[i], DISABLE_SENSOR);
199 writel(0, privdata->mmio + amd_get_p2c_val(privdata, 0));
200 mp2_ops->start(privdata, info);
201 status = amd_sfh_wait_for_response
202 (privdata, cl_data->sensor_idx[i], ENABLE_SENSOR);
203
204 cl_data->sensor_sts[i] = (status == 0) ? SENSOR_ENABLED : SENSOR_DISABLED;
205 }
206
207 for (i = 0; i < cl_data->num_hid_devices; i++) {
208 if (cl_data->sensor_idx[i] == SRA_IDX)
209 continue;
210 cl_data->cur_hid_dev = i;
211 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
212 cl_data->is_any_sensor_enabled = true;
213 rc = amdtp_hid_probe(i, cl_data);
214 if (rc)
215 goto cleanup;
216 switch (cl_data->sensor_idx[i]) {
217 case HPD_IDX:
218 privdata->dev_en.is_hpd_present = true;
219 privdata->dev_en.is_hpd_enabled = true;
220 amd_sfh_toggle_hpd(privdata, false);
221 break;
222 case ALS_IDX:
223 privdata->dev_en.is_als_present = true;
224 break;
225 }
226 }
227 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
228 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
229 cl_data->sensor_sts[i]);
230 }
231
232 if (!cl_data->is_any_sensor_enabled) {
233 dev_warn(dev, "No sensor registered, sensors not enabled is %d\n",
234 cl_data->is_any_sensor_enabled);
235 rc = -EOPNOTSUPP;
236 goto cleanup;
237 }
238
239 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
240 return 0;
241
242 cleanup:
243 amd_sfh_hid_client_deinit(privdata);
244 for (i = 0; i < cl_data->num_hid_devices; i++) {
245 if (cl_data->sensor_idx[i] == SRA_IDX)
246 continue;
247 devm_kfree(dev, cl_data->feature_report[i]);
248 devm_kfree(dev, in_data->input_report[i]);
249 devm_kfree(dev, cl_data->report_descr[i]);
250 }
251 return rc;
252 }
253
amd_sfh_resume(struct amd_mp2_dev * mp2)254 static void amd_sfh_resume(struct amd_mp2_dev *mp2)
255 {
256 struct amdtp_cl_data *cl_data = mp2->cl_data;
257 struct amd_mp2_sensor_info info;
258 int i, status;
259
260 if (!cl_data->is_any_sensor_enabled) {
261 amd_sfh_clear_intr(mp2);
262 return;
263 }
264
265 for (i = 0; i < cl_data->num_hid_devices; i++) {
266 /* leave HPD alone; policy is controlled by sysfs */
267 if (cl_data->sensor_idx[i] == HPD_IDX)
268 continue;
269
270 if (cl_data->sensor_sts[i] == SENSOR_DISABLED) {
271 info.sensor_idx = cl_data->sensor_idx[i];
272 mp2->mp2_ops->start(mp2, info);
273 status = amd_sfh_wait_for_response
274 (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR);
275 if (status == 0)
276 status = SENSOR_ENABLED;
277 if (status == SENSOR_ENABLED)
278 cl_data->sensor_sts[i] = SENSOR_ENABLED;
279 dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n",
280 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
281 cl_data->sensor_sts[i]);
282 }
283 }
284
285 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
286 amd_sfh_clear_intr(mp2);
287 }
288
amd_sfh_suspend(struct amd_mp2_dev * mp2)289 static void amd_sfh_suspend(struct amd_mp2_dev *mp2)
290 {
291 struct amdtp_cl_data *cl_data = mp2->cl_data;
292 int i, status;
293
294 if (!cl_data->is_any_sensor_enabled) {
295 amd_sfh_clear_intr(mp2);
296 return;
297 }
298
299 for (i = 0; i < cl_data->num_hid_devices; i++) {
300 /* leave HPD alone; policy is controlled by sysfs */
301 if (cl_data->sensor_idx[i] == HPD_IDX)
302 continue;
303 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
304 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
305 status = amd_sfh_wait_for_response
306 (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR);
307 if (status == 0)
308 status = SENSOR_DISABLED;
309 if (status != SENSOR_ENABLED)
310 cl_data->sensor_sts[i] = SENSOR_DISABLED;
311 dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n",
312 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
313 cl_data->sensor_sts[i]);
314 }
315 }
316
317 cancel_delayed_work_sync(&cl_data->work_buffer);
318 amd_sfh_clear_intr(mp2);
319 }
320
amd_sfh_toggle_hpd(struct amd_mp2_dev * mp2,bool enabled)321 void amd_sfh_toggle_hpd(struct amd_mp2_dev *mp2, bool enabled)
322 {
323 struct amdtp_cl_data *cl_data = mp2->cl_data;
324 struct amd_mp2_sensor_info info;
325 int i, status;
326
327 if (mp2->dev_en.is_hpd_enabled == enabled)
328 return;
329
330 for (i = 0; i < cl_data->num_hid_devices; i++) {
331 if (cl_data->sensor_idx[i] != HPD_IDX)
332 continue;
333 info.sensor_idx = cl_data->sensor_idx[i];
334 if (enabled) {
335 mp2->mp2_ops->start(mp2, info);
336 status = amd_sfh_wait_for_response
337 (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR);
338 if (status == 0)
339 status = SENSOR_ENABLED;
340 if (status == SENSOR_ENABLED)
341 cl_data->sensor_sts[i] = SENSOR_ENABLED;
342 } else {
343 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
344 status = amd_sfh_wait_for_response
345 (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR);
346 if (status == 0)
347 status = SENSOR_DISABLED;
348 if (status != SENSOR_ENABLED)
349 cl_data->sensor_sts[i] = SENSOR_DISABLED;
350 }
351 dev_dbg(&mp2->pdev->dev, "toggle sid 0x%x (%s) status 0x%x\n",
352 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
353 cl_data->sensor_sts[i]);
354 break;
355 }
356 mp2->dev_en.is_hpd_enabled = enabled;
357 }
358
amd_mp2_pci_remove(void * privdata)359 static void amd_mp2_pci_remove(void *privdata)
360 {
361 struct amd_mp2_dev *mp2 = privdata;
362
363 sfh_deinit_emp2();
364 amd_sfh_hid_client_deinit(privdata);
365 mp2->mp2_ops->stop_all(mp2);
366 pcim_intx(mp2->pdev, false);
367 amd_sfh_clear_intr(mp2);
368 }
369
amd_sfh_set_ops(struct amd_mp2_dev * mp2)370 static void amd_sfh_set_ops(struct amd_mp2_dev *mp2)
371 {
372 struct amd_mp2_ops *mp2_ops;
373
374 sfh_interface_init(mp2);
375 mp2_ops = mp2->mp2_ops;
376 mp2_ops->clear_intr = amd_sfh_clear_intr_v2;
377 mp2_ops->init_intr = amd_sfh_irq_init_v2;
378 mp2_ops->suspend = amd_sfh_suspend;
379 mp2_ops->resume = amd_sfh_resume;
380 mp2_ops->remove = amd_mp2_pci_remove;
381 }
382
amd_sfh1_1_init(struct amd_mp2_dev * mp2)383 int amd_sfh1_1_init(struct amd_mp2_dev *mp2)
384 {
385 u32 phy_base = readl(mp2->mmio + amd_get_c2p_val(mp2, 22));
386 struct device *dev = &mp2->pdev->dev;
387 struct sfh_base_info binfo;
388 int rc;
389
390 phy_base <<= 21;
391 if (!devm_request_mem_region(dev, phy_base, 128 * 1024, "amd_sfh")) {
392 dev_dbg(dev, "can't reserve mmio registers\n");
393 return -ENOMEM;
394 }
395
396 mp2->vsbase = devm_ioremap(dev, phy_base, 128 * 1024);
397 if (!mp2->vsbase) {
398 dev_dbg(dev, "failed to remap vsbase\n");
399 return -ENOMEM;
400 }
401
402 /* Before accessing give time for SFH firmware for processing configuration */
403 msleep(5000);
404
405 memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info));
406 if (binfo.sbase.fw_info.fw_ver == 0 || binfo.sbase.s_list.sl.sensors == 0) {
407 dev_dbg(dev, "No sensor registered\n");
408 return -EOPNOTSUPP;
409 }
410 dev_dbg(dev, "firmware version 0x%x\n", binfo.sbase.fw_info.fw_ver);
411
412 amd_sfh_set_ops(mp2);
413
414 rc = amd_sfh_irq_init(mp2);
415 if (rc) {
416 sfh_deinit_emp2();
417 dev_err(dev, "amd_sfh_irq_init failed\n");
418 return rc;
419 }
420
421 rc = amd_sfh1_1_hid_client_init(mp2);
422 if (rc) {
423 sfh_deinit_emp2();
424 if ((rc != -ENODEV) && (rc != -EOPNOTSUPP))
425 dev_err(dev, "amd_sfh1_1_hid_client_init failed\n");
426 return rc;
427 }
428
429 return rc;
430 }
431