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 <[email protected]>
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 }
87
88 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
89 privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
90 status = amd_sfh_wait_for_response
91 (privdata, cl_data->sensor_idx[i], DISABLE_SENSOR);
92 if (status == 0)
93 cl_data->sensor_sts[i] = SENSOR_DISABLED;
94 dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x (%s) status 0x%x\n",
95 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
96 cl_data->sensor_sts[i]);
97 }
98 }
99
100 cancel_delayed_work_sync(&cl_data->work);
101 cancel_delayed_work_sync(&cl_data->work_buffer);
102 amdtp_hid_remove(cl_data);
103
104 return 0;
105 }
106
amd_sfh1_1_hid_client_init(struct amd_mp2_dev * privdata)107 static int amd_sfh1_1_hid_client_init(struct amd_mp2_dev *privdata)
108 {
109 struct amd_input_data *in_data = &privdata->in_data;
110 struct amdtp_cl_data *cl_data = privdata->cl_data;
111 struct amd_mp2_ops *mp2_ops = privdata->mp2_ops;
112 struct amd_mp2_sensor_info info;
113 struct request_list *req_list;
114 u32 feature_report_size;
115 u32 input_report_size;
116 struct device *dev;
117 int rc, i, status;
118 u8 cl_idx;
119
120 req_list = &cl_data->req_list;
121 dev = &privdata->pdev->dev;
122 amd_sfh1_1_set_desc_ops(mp2_ops);
123
124 cl_data->num_hid_devices = amd_sfh_get_sensor_num(privdata, &cl_data->sensor_idx[0]);
125 if (cl_data->num_hid_devices == 0)
126 return -ENODEV;
127 cl_data->is_any_sensor_enabled = false;
128
129 INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work);
130 INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer);
131 INIT_LIST_HEAD(&req_list->list);
132 cl_data->in_data = in_data;
133
134 for (i = 0; i < cl_data->num_hid_devices; i++) {
135 cl_data->sensor_sts[i] = SENSOR_DISABLED;
136
137 if (cl_data->num_hid_devices == 1 && cl_data->sensor_idx[0] == SRA_IDX)
138 break;
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 privdata->dev_en.is_sra_present = true;
150 continue;
151 }
152
153 cl_data->sensor_requested_cnt[i] = 0;
154 cl_data->cur_hid_dev = i;
155 cl_idx = cl_data->sensor_idx[i];
156
157 cl_data->report_descr_sz[i] = mp2_ops->get_desc_sz(cl_idx, descr_size);
158 if (!cl_data->report_descr_sz[i]) {
159 rc = -EINVAL;
160 goto cleanup;
161 }
162 feature_report_size = mp2_ops->get_desc_sz(cl_idx, feature_size);
163 if (!feature_report_size) {
164 rc = -EINVAL;
165 goto cleanup;
166 }
167 input_report_size = mp2_ops->get_desc_sz(cl_idx, input_size);
168 if (!input_report_size) {
169 rc = -EINVAL;
170 goto cleanup;
171 }
172 cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL);
173 if (!cl_data->feature_report[i]) {
174 rc = -ENOMEM;
175 goto cleanup;
176 }
177 in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL);
178 if (!in_data->input_report[i]) {
179 rc = -ENOMEM;
180 goto cleanup;
181 }
182
183 info.sensor_idx = cl_idx;
184
185 cl_data->report_descr[i] =
186 devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL);
187 if (!cl_data->report_descr[i]) {
188 rc = -ENOMEM;
189 goto cleanup;
190 }
191 rc = mp2_ops->get_rep_desc(cl_idx, cl_data->report_descr[i]);
192 if (rc)
193 goto cleanup;
194
195 writel(0, privdata->mmio + amd_get_p2c_val(privdata, 0));
196 mp2_ops->start(privdata, info);
197 status = amd_sfh_wait_for_response
198 (privdata, cl_data->sensor_idx[i], ENABLE_SENSOR);
199
200 cl_data->sensor_sts[i] = (status == 0) ? SENSOR_ENABLED : SENSOR_DISABLED;
201 }
202
203 for (i = 0; i < cl_data->num_hid_devices; i++) {
204 if (cl_data->sensor_idx[i] == SRA_IDX)
205 continue;
206 cl_data->cur_hid_dev = i;
207 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
208 cl_data->is_any_sensor_enabled = true;
209 rc = amdtp_hid_probe(i, cl_data);
210 if (rc)
211 goto cleanup;
212 switch (cl_data->sensor_idx[i]) {
213 case HPD_IDX:
214 privdata->dev_en.is_hpd_present = true;
215 break;
216 case ALS_IDX:
217 privdata->dev_en.is_als_present = true;
218 break;
219 }
220 }
221 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
222 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
223 cl_data->sensor_sts[i]);
224 }
225
226 if (!cl_data->is_any_sensor_enabled) {
227 dev_warn(dev, "No sensor registered, sensors not enabled is %d\n",
228 cl_data->is_any_sensor_enabled);
229 rc = -EOPNOTSUPP;
230 goto cleanup;
231 }
232
233 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
234 return 0;
235
236 cleanup:
237 amd_sfh_hid_client_deinit(privdata);
238 for (i = 0; i < cl_data->num_hid_devices; i++) {
239 devm_kfree(dev, cl_data->feature_report[i]);
240 devm_kfree(dev, in_data->input_report[i]);
241 devm_kfree(dev, cl_data->report_descr[i]);
242 }
243 return rc;
244 }
245
amd_sfh_resume(struct amd_mp2_dev * mp2)246 static void amd_sfh_resume(struct amd_mp2_dev *mp2)
247 {
248 struct amdtp_cl_data *cl_data = mp2->cl_data;
249 struct amd_mp2_sensor_info info;
250 int i, status;
251
252 if (!cl_data->is_any_sensor_enabled) {
253 amd_sfh_clear_intr(mp2);
254 return;
255 }
256
257 for (i = 0; i < cl_data->num_hid_devices; i++) {
258 if (cl_data->sensor_sts[i] == SENSOR_DISABLED) {
259 info.sensor_idx = cl_data->sensor_idx[i];
260 mp2->mp2_ops->start(mp2, info);
261 status = amd_sfh_wait_for_response
262 (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR);
263 if (status == 0)
264 status = SENSOR_ENABLED;
265 if (status == SENSOR_ENABLED)
266 cl_data->sensor_sts[i] = SENSOR_ENABLED;
267 dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n",
268 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
269 cl_data->sensor_sts[i]);
270 }
271 }
272
273 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
274 amd_sfh_clear_intr(mp2);
275 }
276
amd_sfh_suspend(struct amd_mp2_dev * mp2)277 static void amd_sfh_suspend(struct amd_mp2_dev *mp2)
278 {
279 struct amdtp_cl_data *cl_data = mp2->cl_data;
280 int i, status;
281
282 if (!cl_data->is_any_sensor_enabled) {
283 amd_sfh_clear_intr(mp2);
284 return;
285 }
286
287 for (i = 0; i < cl_data->num_hid_devices; i++) {
288 if (cl_data->sensor_idx[i] != HPD_IDX &&
289 cl_data->sensor_sts[i] == SENSOR_ENABLED) {
290 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
291 status = amd_sfh_wait_for_response
292 (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR);
293 if (status == 0)
294 status = SENSOR_DISABLED;
295 if (status != SENSOR_ENABLED)
296 cl_data->sensor_sts[i] = SENSOR_DISABLED;
297 dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n",
298 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
299 cl_data->sensor_sts[i]);
300 }
301 }
302
303 cancel_delayed_work_sync(&cl_data->work_buffer);
304 amd_sfh_clear_intr(mp2);
305 }
306
amd_mp2_pci_remove(void * privdata)307 static void amd_mp2_pci_remove(void *privdata)
308 {
309 struct amd_mp2_dev *mp2 = privdata;
310
311 sfh_deinit_emp2();
312 amd_sfh_hid_client_deinit(privdata);
313 mp2->mp2_ops->stop_all(mp2);
314 pcim_intx(mp2->pdev, false);
315 amd_sfh_clear_intr(mp2);
316 }
317
amd_sfh_set_ops(struct amd_mp2_dev * mp2)318 static void amd_sfh_set_ops(struct amd_mp2_dev *mp2)
319 {
320 struct amd_mp2_ops *mp2_ops;
321
322 sfh_interface_init(mp2);
323 mp2_ops = mp2->mp2_ops;
324 mp2_ops->clear_intr = amd_sfh_clear_intr_v2;
325 mp2_ops->init_intr = amd_sfh_irq_init_v2;
326 mp2_ops->suspend = amd_sfh_suspend;
327 mp2_ops->resume = amd_sfh_resume;
328 mp2_ops->remove = amd_mp2_pci_remove;
329 }
330
amd_sfh1_1_init(struct amd_mp2_dev * mp2)331 int amd_sfh1_1_init(struct amd_mp2_dev *mp2)
332 {
333 u32 phy_base = readl(mp2->mmio + amd_get_c2p_val(mp2, 22));
334 struct device *dev = &mp2->pdev->dev;
335 struct sfh_base_info binfo;
336 int rc;
337
338 phy_base <<= 21;
339 if (!devm_request_mem_region(dev, phy_base, 128 * 1024, "amd_sfh")) {
340 dev_dbg(dev, "can't reserve mmio registers\n");
341 return -ENOMEM;
342 }
343
344 mp2->vsbase = devm_ioremap(dev, phy_base, 128 * 1024);
345 if (!mp2->vsbase) {
346 dev_dbg(dev, "failed to remap vsbase\n");
347 return -ENOMEM;
348 }
349
350 /* Before accessing give time for SFH firmware for processing configuration */
351 msleep(5000);
352
353 memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info));
354 if (binfo.sbase.fw_info.fw_ver == 0 || binfo.sbase.s_list.sl.sensors == 0) {
355 dev_dbg(dev, "No sensor registered\n");
356 return -EOPNOTSUPP;
357 }
358 dev_dbg(dev, "firmware version 0x%x\n", binfo.sbase.fw_info.fw_ver);
359
360 amd_sfh_set_ops(mp2);
361
362 rc = amd_sfh_irq_init(mp2);
363 if (rc) {
364 sfh_deinit_emp2();
365 dev_err(dev, "amd_sfh_irq_init failed\n");
366 return rc;
367 }
368
369 rc = amd_sfh1_1_hid_client_init(mp2);
370 if (rc) {
371 sfh_deinit_emp2();
372 if ((rc != -ENODEV) && (rc != -EOPNOTSUPP))
373 dev_err(dev, "amd_sfh1_1_hid_client_init failed\n");
374 return rc;
375 }
376
377 return rc;
378 }
379