xref: /linux/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_init.c (revision fe661d01ab40eb4d1e7c6a8ace699901e6aef77b)
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 		writel(0, privdata->mmio + amd_get_p2c_val(privdata, 0));
198 		mp2_ops->start(privdata, info);
199 		status = amd_sfh_wait_for_response
200 				(privdata, cl_data->sensor_idx[i], ENABLE_SENSOR);
201 
202 		cl_data->sensor_sts[i] = (status == 0) ? SENSOR_ENABLED : SENSOR_DISABLED;
203 	}
204 
205 	for (i = 0; i < cl_data->num_hid_devices; i++) {
206 		if (cl_data->sensor_idx[i] == SRA_IDX)
207 			continue;
208 		cl_data->cur_hid_dev = i;
209 		if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
210 			cl_data->is_any_sensor_enabled = true;
211 			rc = amdtp_hid_probe(i, cl_data);
212 			if (rc)
213 				goto cleanup;
214 			switch (cl_data->sensor_idx[i]) {
215 			case HPD_IDX:
216 				privdata->dev_en.is_hpd_present = true;
217 				privdata->dev_en.is_hpd_enabled = true;
218 				amd_sfh_toggle_hpd(privdata, false);
219 				break;
220 			case ALS_IDX:
221 				privdata->dev_en.is_als_present = true;
222 				break;
223 			}
224 		}
225 		dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
226 			cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
227 			cl_data->sensor_sts[i]);
228 	}
229 
230 	if (!cl_data->is_any_sensor_enabled) {
231 		dev_warn(dev, "No sensor registered, sensors not enabled is %d\n",
232 			 cl_data->is_any_sensor_enabled);
233 		rc = -EOPNOTSUPP;
234 		goto cleanup;
235 	}
236 
237 	schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
238 	return 0;
239 
240 cleanup:
241 	amd_sfh_hid_client_deinit(privdata);
242 	for (i = 0; i < cl_data->num_hid_devices; i++) {
243 		if (cl_data->sensor_idx[i] == SRA_IDX)
244 			continue;
245 		devm_kfree(dev, cl_data->feature_report[i]);
246 		devm_kfree(dev, in_data->input_report[i]);
247 		devm_kfree(dev, cl_data->report_descr[i]);
248 	}
249 	return rc;
250 }
251 
amd_sfh_resume(struct amd_mp2_dev * mp2)252 static void amd_sfh_resume(struct amd_mp2_dev *mp2)
253 {
254 	struct amdtp_cl_data *cl_data = mp2->cl_data;
255 	struct amd_mp2_sensor_info info;
256 	int i, status;
257 
258 	if (!cl_data->is_any_sensor_enabled) {
259 		amd_sfh_clear_intr(mp2);
260 		return;
261 	}
262 
263 	for (i = 0; i < cl_data->num_hid_devices; i++) {
264 		/* leave HPD alone; policy is controlled by sysfs */
265 		if (cl_data->sensor_idx[i] == HPD_IDX)
266 			continue;
267 
268 		if (cl_data->sensor_sts[i] == SENSOR_DISABLED) {
269 			info.sensor_idx = cl_data->sensor_idx[i];
270 			mp2->mp2_ops->start(mp2, info);
271 			status = amd_sfh_wait_for_response
272 					(mp2, cl_data->sensor_idx[i], ENABLE_SENSOR);
273 			if (status == 0)
274 				status = SENSOR_ENABLED;
275 			if (status == SENSOR_ENABLED)
276 				cl_data->sensor_sts[i] = SENSOR_ENABLED;
277 			dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n",
278 				cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
279 				cl_data->sensor_sts[i]);
280 		}
281 	}
282 
283 	schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
284 	amd_sfh_clear_intr(mp2);
285 }
286 
amd_sfh_suspend(struct amd_mp2_dev * mp2)287 static void amd_sfh_suspend(struct amd_mp2_dev *mp2)
288 {
289 	struct amdtp_cl_data *cl_data = mp2->cl_data;
290 	int i, status;
291 
292 	if (!cl_data->is_any_sensor_enabled) {
293 		amd_sfh_clear_intr(mp2);
294 		return;
295 	}
296 
297 	for (i = 0; i < cl_data->num_hid_devices; i++) {
298 		/* leave HPD alone; policy is controlled by sysfs */
299 		if (cl_data->sensor_idx[i] == HPD_IDX)
300 			continue;
301 		if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
302 			mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
303 			status = amd_sfh_wait_for_response
304 					(mp2, cl_data->sensor_idx[i], DISABLE_SENSOR);
305 			if (status == 0)
306 				status = SENSOR_DISABLED;
307 			if (status != SENSOR_ENABLED)
308 				cl_data->sensor_sts[i] = SENSOR_DISABLED;
309 			dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n",
310 				cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
311 				cl_data->sensor_sts[i]);
312 		}
313 	}
314 
315 	cancel_delayed_work_sync(&cl_data->work_buffer);
316 	amd_sfh_clear_intr(mp2);
317 }
318 
amd_sfh_toggle_hpd(struct amd_mp2_dev * mp2,bool enabled)319 void amd_sfh_toggle_hpd(struct amd_mp2_dev *mp2, bool enabled)
320 {
321 	struct amdtp_cl_data *cl_data = mp2->cl_data;
322 	struct amd_mp2_sensor_info info;
323 	int i, status;
324 
325 	if (mp2->dev_en.is_hpd_enabled == enabled)
326 		return;
327 
328 	for (i = 0; i < cl_data->num_hid_devices; i++) {
329 		if (cl_data->sensor_idx[i] != HPD_IDX)
330 			continue;
331 		info.sensor_idx = cl_data->sensor_idx[i];
332 		if (enabled) {
333 			mp2->mp2_ops->start(mp2, info);
334 			status = amd_sfh_wait_for_response
335 					(mp2, cl_data->sensor_idx[i], ENABLE_SENSOR);
336 			if (status == 0)
337 				status = SENSOR_ENABLED;
338 			if (status == SENSOR_ENABLED)
339 				cl_data->sensor_sts[i] = SENSOR_ENABLED;
340 		} else {
341 			mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
342 			status = amd_sfh_wait_for_response
343 					(mp2, cl_data->sensor_idx[i], DISABLE_SENSOR);
344 			if (status == 0)
345 				status = SENSOR_DISABLED;
346 			if (status != SENSOR_ENABLED)
347 				cl_data->sensor_sts[i] = SENSOR_DISABLED;
348 		}
349 		dev_dbg(&mp2->pdev->dev, "toggle sid 0x%x (%s) status 0x%x\n",
350 			cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
351 			cl_data->sensor_sts[i]);
352 		break;
353 	}
354 	mp2->dev_en.is_hpd_enabled = enabled;
355 }
356 
amd_mp2_pci_remove(void * privdata)357 static void amd_mp2_pci_remove(void *privdata)
358 {
359 	struct amd_mp2_dev *mp2 = privdata;
360 
361 	sfh_deinit_emp2();
362 	amd_sfh_hid_client_deinit(privdata);
363 	mp2->mp2_ops->stop_all(mp2);
364 	pcim_intx(mp2->pdev, false);
365 	amd_sfh_clear_intr(mp2);
366 }
367 
amd_sfh_set_ops(struct amd_mp2_dev * mp2)368 static void amd_sfh_set_ops(struct amd_mp2_dev *mp2)
369 {
370 	struct amd_mp2_ops *mp2_ops;
371 
372 	sfh_interface_init(mp2);
373 	mp2_ops = mp2->mp2_ops;
374 	mp2_ops->clear_intr = amd_sfh_clear_intr_v2;
375 	mp2_ops->init_intr = amd_sfh_irq_init_v2;
376 	mp2_ops->suspend = amd_sfh_suspend;
377 	mp2_ops->resume = amd_sfh_resume;
378 	mp2_ops->remove = amd_mp2_pci_remove;
379 }
380 
amd_sfh1_1_init(struct amd_mp2_dev * mp2)381 int amd_sfh1_1_init(struct amd_mp2_dev *mp2)
382 {
383 	u32 phy_base = readl(mp2->mmio + amd_get_c2p_val(mp2, 22));
384 	struct device *dev = &mp2->pdev->dev;
385 	struct sfh_base_info binfo;
386 	int rc;
387 
388 	phy_base <<= 21;
389 	if (!devm_request_mem_region(dev, phy_base, 128 * 1024, "amd_sfh")) {
390 		dev_dbg(dev, "can't reserve mmio registers\n");
391 		return -ENOMEM;
392 	}
393 
394 	mp2->vsbase = devm_ioremap(dev, phy_base, 128 * 1024);
395 	if (!mp2->vsbase) {
396 		dev_dbg(dev, "failed to remap vsbase\n");
397 		return -ENOMEM;
398 	}
399 
400 	/* Before accessing give time for SFH firmware for processing configuration */
401 	msleep(5000);
402 
403 	memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info));
404 	if (binfo.sbase.fw_info.fw_ver == 0 || binfo.sbase.s_list.sl.sensors == 0) {
405 		dev_dbg(dev, "No sensor registered\n");
406 		return -EOPNOTSUPP;
407 	}
408 	dev_dbg(dev, "firmware version 0x%x\n", binfo.sbase.fw_info.fw_ver);
409 
410 	amd_sfh_set_ops(mp2);
411 
412 	rc = amd_sfh_irq_init(mp2);
413 	if (rc) {
414 		sfh_deinit_emp2();
415 		dev_err(dev, "amd_sfh_irq_init failed\n");
416 		return rc;
417 	}
418 
419 	rc = amd_sfh1_1_hid_client_init(mp2);
420 	if (rc) {
421 		sfh_deinit_emp2();
422 		if ((rc != -ENODEV) && (rc != -EOPNOTSUPP))
423 			dev_err(dev, "amd_sfh1_1_hid_client_init failed\n");
424 		return rc;
425 	}
426 
427 	return rc;
428 }
429