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 if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
77 privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
78 status = amd_sfh_wait_for_response
79 (privdata, cl_data->sensor_idx[i], DISABLE_SENSOR);
80 if (status == 0)
81 cl_data->sensor_sts[i] = SENSOR_DISABLED;
82 dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x (%s) status 0x%x\n",
83 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
84 cl_data->sensor_sts[i]);
85 }
86 }
87
88 cancel_delayed_work_sync(&cl_data->work);
89 cancel_delayed_work_sync(&cl_data->work_buffer);
90 amdtp_hid_remove(cl_data);
91
92 return 0;
93 }
94
amd_sfh1_1_hid_client_init(struct amd_mp2_dev * privdata)95 static int amd_sfh1_1_hid_client_init(struct amd_mp2_dev *privdata)
96 {
97 struct amd_input_data *in_data = &privdata->in_data;
98 struct amdtp_cl_data *cl_data = privdata->cl_data;
99 struct amd_mp2_ops *mp2_ops = privdata->mp2_ops;
100 struct amd_mp2_sensor_info info;
101 struct request_list *req_list;
102 u32 feature_report_size;
103 u32 input_report_size;
104 struct device *dev;
105 int rc, i, status;
106 u8 cl_idx;
107
108 req_list = &cl_data->req_list;
109 dev = &privdata->pdev->dev;
110 amd_sfh1_1_set_desc_ops(mp2_ops);
111
112 cl_data->num_hid_devices = amd_sfh_get_sensor_num(privdata, &cl_data->sensor_idx[0]);
113 if (cl_data->num_hid_devices == 0)
114 return -ENODEV;
115
116 INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work);
117 INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer);
118 INIT_LIST_HEAD(&req_list->list);
119 cl_data->in_data = in_data;
120
121 for (i = 0; i < cl_data->num_hid_devices; i++) {
122 cl_data->sensor_sts[i] = SENSOR_DISABLED;
123 cl_data->sensor_requested_cnt[i] = 0;
124 cl_data->cur_hid_dev = i;
125 cl_idx = cl_data->sensor_idx[i];
126
127 cl_data->report_descr_sz[i] = mp2_ops->get_desc_sz(cl_idx, descr_size);
128 if (!cl_data->report_descr_sz[i]) {
129 rc = -EINVAL;
130 goto cleanup;
131 }
132 feature_report_size = mp2_ops->get_desc_sz(cl_idx, feature_size);
133 if (!feature_report_size) {
134 rc = -EINVAL;
135 goto cleanup;
136 }
137 input_report_size = mp2_ops->get_desc_sz(cl_idx, input_size);
138 if (!input_report_size) {
139 rc = -EINVAL;
140 goto cleanup;
141 }
142 cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL);
143 if (!cl_data->feature_report[i]) {
144 rc = -ENOMEM;
145 goto cleanup;
146 }
147 in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL);
148 if (!in_data->input_report[i]) {
149 rc = -ENOMEM;
150 goto cleanup;
151 }
152
153 info.sensor_idx = cl_idx;
154
155 cl_data->report_descr[i] =
156 devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL);
157 if (!cl_data->report_descr[i]) {
158 rc = -ENOMEM;
159 goto cleanup;
160 }
161 rc = mp2_ops->get_rep_desc(cl_idx, cl_data->report_descr[i]);
162 if (rc)
163 goto cleanup;
164
165 writel(0, privdata->mmio + AMD_P2C_MSG(0));
166 mp2_ops->start(privdata, info);
167 status = amd_sfh_wait_for_response
168 (privdata, cl_data->sensor_idx[i], ENABLE_SENSOR);
169
170 status = (status == 0) ? SENSOR_ENABLED : SENSOR_DISABLED;
171
172 if (status == SENSOR_ENABLED) {
173 cl_data->sensor_sts[i] = SENSOR_ENABLED;
174 rc = amdtp_hid_probe(i, cl_data);
175 if (rc) {
176 mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
177 status = amd_sfh_wait_for_response
178 (privdata, cl_data->sensor_idx[i], DISABLE_SENSOR);
179 if (status == 0)
180 status = SENSOR_DISABLED;
181 if (status != SENSOR_ENABLED)
182 cl_data->sensor_sts[i] = SENSOR_DISABLED;
183 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
184 cl_data->sensor_idx[i],
185 get_sensor_name(cl_data->sensor_idx[i]),
186 cl_data->sensor_sts[i]);
187 goto cleanup;
188 }
189 }
190 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
191 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
192 cl_data->sensor_sts[i]);
193 }
194
195 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
196 return 0;
197
198 cleanup:
199 amd_sfh_hid_client_deinit(privdata);
200 for (i = 0; i < cl_data->num_hid_devices; i++) {
201 devm_kfree(dev, cl_data->feature_report[i]);
202 devm_kfree(dev, in_data->input_report[i]);
203 devm_kfree(dev, cl_data->report_descr[i]);
204 }
205 return rc;
206 }
207
amd_sfh_resume(struct amd_mp2_dev * mp2)208 static void amd_sfh_resume(struct amd_mp2_dev *mp2)
209 {
210 struct amdtp_cl_data *cl_data = mp2->cl_data;
211 struct amd_mp2_sensor_info info;
212 int i, status;
213
214 for (i = 0; i < cl_data->num_hid_devices; i++) {
215 if (cl_data->sensor_sts[i] == SENSOR_DISABLED) {
216 info.sensor_idx = cl_data->sensor_idx[i];
217 mp2->mp2_ops->start(mp2, info);
218 status = amd_sfh_wait_for_response
219 (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR);
220 if (status == 0)
221 status = SENSOR_ENABLED;
222 if (status == SENSOR_ENABLED)
223 cl_data->sensor_sts[i] = SENSOR_ENABLED;
224 dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n",
225 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
226 cl_data->sensor_sts[i]);
227 }
228 }
229
230 schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
231 amd_sfh_clear_intr(mp2);
232 }
233
amd_sfh_suspend(struct amd_mp2_dev * mp2)234 static void amd_sfh_suspend(struct amd_mp2_dev *mp2)
235 {
236 struct amdtp_cl_data *cl_data = mp2->cl_data;
237 int i, status;
238
239 for (i = 0; i < cl_data->num_hid_devices; i++) {
240 if (cl_data->sensor_idx[i] != HPD_IDX &&
241 cl_data->sensor_sts[i] == SENSOR_ENABLED) {
242 mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
243 status = amd_sfh_wait_for_response
244 (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR);
245 if (status == 0)
246 status = SENSOR_DISABLED;
247 if (status != SENSOR_ENABLED)
248 cl_data->sensor_sts[i] = SENSOR_DISABLED;
249 dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n",
250 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
251 cl_data->sensor_sts[i]);
252 }
253 }
254
255 cancel_delayed_work_sync(&cl_data->work_buffer);
256 amd_sfh_clear_intr(mp2);
257 }
258
amd_mp2_pci_remove(void * privdata)259 static void amd_mp2_pci_remove(void *privdata)
260 {
261 struct amd_mp2_dev *mp2 = privdata;
262
263 amd_sfh_hid_client_deinit(privdata);
264 mp2->mp2_ops->stop_all(mp2);
265 pci_intx(mp2->pdev, false);
266 amd_sfh_clear_intr(mp2);
267 }
268
amd_sfh_set_ops(struct amd_mp2_dev * mp2)269 static void amd_sfh_set_ops(struct amd_mp2_dev *mp2)
270 {
271 struct amd_mp2_ops *mp2_ops;
272
273 sfh_interface_init(mp2);
274 mp2_ops = mp2->mp2_ops;
275 mp2_ops->clear_intr = amd_sfh_clear_intr_v2,
276 mp2_ops->init_intr = amd_sfh_irq_init_v2,
277 mp2_ops->suspend = amd_sfh_suspend;
278 mp2_ops->resume = amd_sfh_resume;
279 mp2_ops->remove = amd_mp2_pci_remove;
280 }
281
amd_sfh1_1_init(struct amd_mp2_dev * mp2)282 int amd_sfh1_1_init(struct amd_mp2_dev *mp2)
283 {
284 u32 phy_base = readl(mp2->mmio + AMD_C2P_MSG(22));
285 struct device *dev = &mp2->pdev->dev;
286 struct sfh_base_info binfo;
287 int rc;
288
289 phy_base <<= 21;
290 if (!devm_request_mem_region(dev, phy_base, 128 * 1024, "amd_sfh")) {
291 dev_dbg(dev, "can't reserve mmio registers\n");
292 return -ENOMEM;
293 }
294
295 mp2->vsbase = devm_ioremap(dev, phy_base, 128 * 1024);
296 if (!mp2->vsbase) {
297 dev_dbg(dev, "failed to remap vsbase\n");
298 return -ENOMEM;
299 }
300
301 /* Before accessing give time for SFH firmware for processing configuration */
302 msleep(5000);
303
304 memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info));
305 if (binfo.sbase.fw_info.fw_ver == 0 || binfo.sbase.s_list.sl.sensors == 0) {
306 dev_dbg(dev, "failed to get sensors\n");
307 return -EOPNOTSUPP;
308 }
309 dev_dbg(dev, "firmware version 0x%x\n", binfo.sbase.fw_info.fw_ver);
310
311 amd_sfh_set_ops(mp2);
312
313 rc = amd_sfh_irq_init(mp2);
314 if (rc) {
315 dev_err(dev, "amd_sfh_irq_init failed\n");
316 return rc;
317 }
318
319 rc = amd_sfh1_1_hid_client_init(mp2);
320 if (rc) {
321 dev_err(dev, "amd_sfh1_1_hid_client_init failed\n");
322 return rc;
323 }
324
325 return rc;
326 }
327