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 ALS_IDX:
34 case HPD_IDX:
35 if (BIT(i) & slist->sl.sensors)
36 sensor_id[num_of_sensors++] = i;
37 break;
38 }
39 }
40
41 return num_of_sensors;
42 }
43
amd_sfh_wait_for_response(struct amd_mp2_dev * mp2,u8 sid,u32 cmd_id)44 static u32 amd_sfh_wait_for_response(struct amd_mp2_dev *mp2, u8 sid, u32 cmd_id)
45 {
46 if (mp2->mp2_ops->response)
47 return mp2->mp2_ops->response(mp2, sid, cmd_id);
48
49 return 0;
50 }
51
get_sensor_name(int idx)52 static const char *get_sensor_name(int idx)
53 {
54 switch (idx) {
55 case ACCEL_IDX:
56 return "accelerometer";
57 case GYRO_IDX:
58 return "gyroscope";
59 case MAG_IDX:
60 return "magnetometer";
61 case ALS_IDX:
62 return "ALS";
63 case HPD_IDX:
64 return "HPD";
65 default:
66 return "unknown sensor type";
67 }
68 }
69
amd_sfh_hid_client_deinit(struct amd_mp2_dev * privdata)70 static int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata)
71 {
72 struct amdtp_cl_data *cl_data = privdata->cl_data;
73 int i, status;
74
75 for (i = 0; i < cl_data->num_hid_devices; i++) {
76 switch (cl_data->sensor_idx[i]) {
77 case HPD_IDX:
78 privdata->dev_en.is_hpd_present = false;
79 break;
80 case ALS_IDX:
81 privdata->dev_en.is_als_present = false;
82 break;
83 }
84
85 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
86 privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
87 status = amd_sfh_wait_for_response
88 (privdata, cl_data->sensor_idx[i], DISABLE_SENSOR);
89 if (status == 0)
90 cl_data->sensor_sts[i] = SENSOR_DISABLED;
91 dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x (%s) status 0x%x\n",
92 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
93 cl_data->sensor_sts[i]);
94 }
95 }
96
97 cancel_delayed_work_sync(&cl_data->work);
98 cancel_delayed_work_sync(&cl_data->work_buffer);
99 amdtp_hid_remove(cl_data);
100
101 return 0;
102 }
103
amd_sfh1_1_hid_client_init(struct amd_mp2_dev * privdata)104 static int amd_sfh1_1_hid_client_init(struct amd_mp2_dev *privdata)
105 {
106 struct amd_input_data *in_data = &privdata->in_data;
107 struct amdtp_cl_data *cl_data = privdata->cl_data;
108 struct amd_mp2_ops *mp2_ops = privdata->mp2_ops;
109 struct amd_mp2_sensor_info info;
110 struct request_list *req_list;
111 u32 feature_report_size;
112 u32 input_report_size;
113 struct device *dev;
114 int rc, i, status;
115 u8 cl_idx;
116
117 req_list = &cl_data->req_list;
118 dev = &privdata->pdev->dev;
119 amd_sfh1_1_set_desc_ops(mp2_ops);
120
121 cl_data->num_hid_devices = amd_sfh_get_sensor_num(privdata, &cl_data->sensor_idx[0]);
122 if (cl_data->num_hid_devices == 0)
123 return -ENODEV;
124 cl_data->is_any_sensor_enabled = false;
125
126 INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work);
127 INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer);
128 INIT_LIST_HEAD(&req_list->list);
129 cl_data->in_data = in_data;
130
131 for (i = 0; i < cl_data->num_hid_devices; i++) {
132 cl_data->sensor_sts[i] = SENSOR_DISABLED;
133 cl_data->sensor_requested_cnt[i] = 0;
134 cl_data->cur_hid_dev = i;
135 cl_idx = cl_data->sensor_idx[i];
136
137 cl_data->report_descr_sz[i] = mp2_ops->get_desc_sz(cl_idx, descr_size);
138 if (!cl_data->report_descr_sz[i]) {
139 rc = -EINVAL;
140 goto cleanup;
141 }
142 feature_report_size = mp2_ops->get_desc_sz(cl_idx, feature_size);
143 if (!feature_report_size) {
144 rc = -EINVAL;
145 goto cleanup;
146 }
147 input_report_size = mp2_ops->get_desc_sz(cl_idx, input_size);
148 if (!input_report_size) {
149 rc = -EINVAL;
150 goto cleanup;
151 }
152 cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL);
153 if (!cl_data->feature_report[i]) {
154 rc = -ENOMEM;
155 goto cleanup;
156 }
157 in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL);
158 if (!in_data->input_report[i]) {
159 rc = -ENOMEM;
160 goto cleanup;
161 }
162
163 info.sensor_idx = cl_idx;
164
165 cl_data->report_descr[i] =
166 devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL);
167 if (!cl_data->report_descr[i]) {
168 rc = -ENOMEM;
169 goto cleanup;
170 }
171 rc = mp2_ops->get_rep_desc(cl_idx, cl_data->report_descr[i]);
172 if (rc)
173 goto cleanup;
174
175 writel(0, privdata->mmio + amd_get_p2c_val(privdata, 0));
176 mp2_ops->start(privdata, info);
177 status = amd_sfh_wait_for_response
178 (privdata, cl_data->sensor_idx[i], ENABLE_SENSOR);
179
180 cl_data->sensor_sts[i] = (status == 0) ? SENSOR_ENABLED : SENSOR_DISABLED;
181 }
182
183 for (i = 0; i < cl_data->num_hid_devices; i++) {
184 cl_data->cur_hid_dev = i;
185 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
186 cl_data->is_any_sensor_enabled = true;
187 rc = amdtp_hid_probe(i, cl_data);
188 if (rc)
189 goto cleanup;
190 switch (cl_data->sensor_idx[i]) {
191 case HPD_IDX:
192 privdata->dev_en.is_hpd_present = true;
193 break;
194 case ALS_IDX:
195 privdata->dev_en.is_als_present = true;
196 break;
197 }
198 }
199 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
200 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
201 cl_data->sensor_sts[i]);
202 }
203
204 if (!cl_data->is_any_sensor_enabled) {
205 dev_warn(dev, "No sensor registered, sensors not enabled is %d\n",
206 cl_data->is_any_sensor_enabled);
207 rc = -EOPNOTSUPP;
208 goto cleanup;
209 }
210
211 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
212 return 0;
213
214 cleanup:
215 amd_sfh_hid_client_deinit(privdata);
216 for (i = 0; i < cl_data->num_hid_devices; i++) {
217 devm_kfree(dev, cl_data->feature_report[i]);
218 devm_kfree(dev, in_data->input_report[i]);
219 devm_kfree(dev, cl_data->report_descr[i]);
220 }
221 return rc;
222 }
223
amd_sfh_resume(struct amd_mp2_dev * mp2)224 static void amd_sfh_resume(struct amd_mp2_dev *mp2)
225 {
226 struct amdtp_cl_data *cl_data = mp2->cl_data;
227 struct amd_mp2_sensor_info info;
228 int i, status;
229
230 if (!cl_data->is_any_sensor_enabled) {
231 amd_sfh_clear_intr(mp2);
232 return;
233 }
234
235 for (i = 0; i < cl_data->num_hid_devices; i++) {
236 if (cl_data->sensor_sts[i] == SENSOR_DISABLED) {
237 info.sensor_idx = cl_data->sensor_idx[i];
238 mp2->mp2_ops->start(mp2, info);
239 status = amd_sfh_wait_for_response
240 (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR);
241 if (status == 0)
242 status = SENSOR_ENABLED;
243 if (status == SENSOR_ENABLED)
244 cl_data->sensor_sts[i] = SENSOR_ENABLED;
245 dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n",
246 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
247 cl_data->sensor_sts[i]);
248 }
249 }
250
251 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
252 amd_sfh_clear_intr(mp2);
253 }
254
amd_sfh_suspend(struct amd_mp2_dev * mp2)255 static void amd_sfh_suspend(struct amd_mp2_dev *mp2)
256 {
257 struct amdtp_cl_data *cl_data = mp2->cl_data;
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 if (cl_data->sensor_idx[i] != HPD_IDX &&
267 cl_data->sensor_sts[i] == SENSOR_ENABLED) {
268 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
269 status = amd_sfh_wait_for_response
270 (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR);
271 if (status == 0)
272 status = SENSOR_DISABLED;
273 if (status != SENSOR_ENABLED)
274 cl_data->sensor_sts[i] = SENSOR_DISABLED;
275 dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n",
276 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
277 cl_data->sensor_sts[i]);
278 }
279 }
280
281 cancel_delayed_work_sync(&cl_data->work_buffer);
282 amd_sfh_clear_intr(mp2);
283 }
284
amd_mp2_pci_remove(void * privdata)285 static void amd_mp2_pci_remove(void *privdata)
286 {
287 struct amd_mp2_dev *mp2 = privdata;
288
289 sfh_deinit_emp2();
290 amd_sfh_hid_client_deinit(privdata);
291 mp2->mp2_ops->stop_all(mp2);
292 pci_intx(mp2->pdev, false);
293 amd_sfh_clear_intr(mp2);
294 }
295
amd_sfh_set_ops(struct amd_mp2_dev * mp2)296 static void amd_sfh_set_ops(struct amd_mp2_dev *mp2)
297 {
298 struct amd_mp2_ops *mp2_ops;
299
300 sfh_interface_init(mp2);
301 mp2_ops = mp2->mp2_ops;
302 mp2_ops->clear_intr = amd_sfh_clear_intr_v2;
303 mp2_ops->init_intr = amd_sfh_irq_init_v2;
304 mp2_ops->suspend = amd_sfh_suspend;
305 mp2_ops->resume = amd_sfh_resume;
306 mp2_ops->remove = amd_mp2_pci_remove;
307 }
308
amd_sfh1_1_init(struct amd_mp2_dev * mp2)309 int amd_sfh1_1_init(struct amd_mp2_dev *mp2)
310 {
311 u32 phy_base = readl(mp2->mmio + amd_get_c2p_val(mp2, 22));
312 struct device *dev = &mp2->pdev->dev;
313 struct sfh_base_info binfo;
314 int rc;
315
316 phy_base <<= 21;
317 if (!devm_request_mem_region(dev, phy_base, 128 * 1024, "amd_sfh")) {
318 dev_dbg(dev, "can't reserve mmio registers\n");
319 return -ENOMEM;
320 }
321
322 mp2->vsbase = devm_ioremap(dev, phy_base, 128 * 1024);
323 if (!mp2->vsbase) {
324 dev_dbg(dev, "failed to remap vsbase\n");
325 return -ENOMEM;
326 }
327
328 /* Before accessing give time for SFH firmware for processing configuration */
329 msleep(5000);
330
331 memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info));
332 if (binfo.sbase.fw_info.fw_ver == 0 || binfo.sbase.s_list.sl.sensors == 0) {
333 dev_dbg(dev, "No sensor registered\n");
334 return -EOPNOTSUPP;
335 }
336 dev_dbg(dev, "firmware version 0x%x\n", binfo.sbase.fw_info.fw_ver);
337
338 amd_sfh_set_ops(mp2);
339
340 rc = amd_sfh_irq_init(mp2);
341 if (rc) {
342 sfh_deinit_emp2();
343 dev_err(dev, "amd_sfh_irq_init failed\n");
344 return rc;
345 }
346
347 rc = amd_sfh1_1_hid_client_init(mp2);
348 if (rc) {
349 sfh_deinit_emp2();
350 if ((rc != -ENODEV) && (rc != -EOPNOTSUPP))
351 dev_err(dev, "amd_sfh1_1_hid_client_init failed\n");
352 return rc;
353 }
354
355 return rc;
356 }
357