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