amd_sfh_client.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 *  AMD SFH Client Layer
  4 *  Copyright 2020-2021 Advanced Micro Devices, Inc.
  5 *  Authors: Nehal Bakulchandra Shah <Nehal-Bakulchandra.Shah@amd.com>
  6 *	     Sandeep Singh <Sandeep.singh@amd.com>
  7 *	     Basavaraj Natikar <Basavaraj.Natikar@amd.com>
  8 */
  9
 10#include <linux/dma-mapping.h>
 11#include <linux/hid.h>
 12#include <linux/list.h>
 13#include <linux/slab.h>
 14#include <linux/workqueue.h>
 15#include <linux/errno.h>
 16
 17#include "hid_descriptor/amd_sfh_hid_desc.h"
 18#include "amd_sfh_pcie.h"
 19#include "amd_sfh_hid.h"
 20
 21void amd_sfh_set_report(struct hid_device *hid, int report_id,
 22			int report_type)
 23{
 24	struct amdtp_hid_data *hid_data = hid->driver_data;
 25	struct amdtp_cl_data *cli_data = hid_data->cli_data;
 26	int i;
 27
 28	for (i = 0; i < cli_data->num_hid_devices; i++) {
 29		if (cli_data->hid_sensor_hubs[i] == hid) {
 30			cli_data->cur_hid_dev = i;
 31			break;
 32		}
 33	}
 34	amdtp_hid_wakeup(hid);
 35}
 36
 37int amd_sfh_get_report(struct hid_device *hid, int report_id, int report_type)
 38{
 39	struct amdtp_hid_data *hid_data = hid->driver_data;
 40	struct amdtp_cl_data *cli_data = hid_data->cli_data;
 41	struct request_list *req_list = &cli_data->req_list;
 42	struct amd_input_data *in_data = cli_data->in_data;
 43	struct amd_mp2_dev *mp2;
 44	int i;
 45
 46	mp2 = container_of(in_data, struct amd_mp2_dev, in_data);
 47	guard(mutex)(&mp2->lock);
 48	for (i = 0; i < cli_data->num_hid_devices; i++) {
 49		if (cli_data->hid_sensor_hubs[i] == hid) {
 50			struct request_list *new = kzalloc(sizeof(*new), GFP_KERNEL);
 51
 52			if (!new)
 53				return -ENOMEM;
 54
 55			new->current_index = i;
 56			new->sensor_idx = cli_data->sensor_idx[i];
 57			new->hid = hid;
 58			new->report_type = report_type;
 59			new->report_id = report_id;
 60			cli_data->report_id[i] = report_id;
 61			cli_data->request_done[i] = false;
 62			list_add(&new->list, &req_list->list);
 63			break;
 64		}
 65	}
 66	schedule_delayed_work(&cli_data->work, 0);
 67	return 0;
 68}
 69
 70void amd_sfh_work(struct work_struct *work)
 71{
 72	struct amdtp_cl_data *cli_data = container_of(work, struct amdtp_cl_data, work.work);
 73	struct request_list *req_list = &cli_data->req_list;
 74	struct amd_input_data *in_data = cli_data->in_data;
 75	struct request_list *req_node;
 76	u8 current_index, sensor_index;
 77	struct amd_mp2_ops *mp2_ops;
 78	struct amd_mp2_dev *mp2;
 79	u8 report_id, node_type;
 80	u8 report_size = 0;
 81
 82	mp2 = container_of(in_data, struct amd_mp2_dev, in_data);
 83	guard(mutex)(&mp2->lock);
 84	req_node = list_last_entry(&req_list->list, struct request_list, list);
 85	list_del(&req_node->list);
 86	current_index = req_node->current_index;
 87	sensor_index = req_node->sensor_idx;
 88	report_id = req_node->report_id;
 89	node_type = req_node->report_type;
 90	kfree(req_node);
 91
 92	mp2_ops = mp2->mp2_ops;
 93	if (node_type == HID_FEATURE_REPORT) {
 94		report_size = mp2_ops->get_feat_rep(sensor_index, report_id,
 95						    cli_data->feature_report[current_index]);
 96		if (report_size)
 97			hid_input_report(cli_data->hid_sensor_hubs[current_index],
 98					 cli_data->report_type[current_index],
 99					 cli_data->feature_report[current_index], report_size, 0);
100		else
101			pr_err("AMDSFH: Invalid report size\n");
102
103	} else if (node_type == HID_INPUT_REPORT) {
104		report_size = mp2_ops->get_in_rep(current_index, sensor_index, report_id, in_data);
105		if (report_size)
106			hid_input_report(cli_data->hid_sensor_hubs[current_index],
107					 cli_data->report_type[current_index],
108					 in_data->input_report[current_index], report_size, 0);
109		else
110			pr_err("AMDSFH: Invalid report size\n");
111	}
112	cli_data->cur_hid_dev = current_index;
113	cli_data->sensor_requested_cnt[current_index] = 0;
114	amdtp_hid_wakeup(cli_data->hid_sensor_hubs[current_index]);
115	if (!list_empty(&req_list->list))
116		schedule_delayed_work(&cli_data->work, 0);
117}
118
119void amd_sfh_work_buffer(struct work_struct *work)
120{
121	struct amdtp_cl_data *cli_data = container_of(work, struct amdtp_cl_data, work_buffer.work);
122	struct amd_input_data *in_data = cli_data->in_data;
123	struct amd_mp2_dev *mp2;
124	u8 report_size;
125	int i;
126
127	mp2 = container_of(in_data, struct amd_mp2_dev, in_data);
128	guard(mutex)(&mp2->lock);
129	for (i = 0; i < cli_data->num_hid_devices; i++) {
130		if (cli_data->sensor_sts[i] == SENSOR_ENABLED) {
131			report_size = mp2->mp2_ops->get_in_rep(i, cli_data->sensor_idx[i],
132							       cli_data->report_id[i], in_data);
133			hid_input_report(cli_data->hid_sensor_hubs[i], HID_INPUT_REPORT,
134					 in_data->input_report[i], report_size, 0);
135		}
136	}
137	schedule_delayed_work(&cli_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
138}
139
140static u32 amd_sfh_wait_for_response(struct amd_mp2_dev *mp2, u8 sid, u32 sensor_sts)
141{
142	if (mp2->mp2_ops->response)
143		sensor_sts = mp2->mp2_ops->response(mp2, sid, sensor_sts);
144
145	return sensor_sts;
146}
147
148static const char *get_sensor_name(int idx)
149{
150	switch (idx) {
151	case accel_idx:
152		return "accelerometer";
153	case gyro_idx:
154		return "gyroscope";
155	case mag_idx:
156		return "magnetometer";
157	case op_idx:
158		return "operating-mode";
159	case als_idx:
160	case ACS_IDX: /* ambient color sensor */
161		return "ALS";
162	case HPD_IDX:
163		return "HPD";
164	default:
165		return "unknown sensor type";
166	}
167}
168
169static void amd_sfh_resume(struct amd_mp2_dev *mp2)
170{
171	struct amdtp_cl_data *cl_data = mp2->cl_data;
172	struct amd_mp2_sensor_info info;
173	int i, status;
174
175	for (i = 0; i < cl_data->num_hid_devices; i++) {
176		if (cl_data->sensor_sts[i] == SENSOR_DISABLED) {
177			info.period = AMD_SFH_IDLE_LOOP;
178			info.sensor_idx = cl_data->sensor_idx[i];
179			info.dma_address = cl_data->sensor_dma_addr[i];
180			mp2->mp2_ops->start(mp2, info);
181			status = amd_sfh_wait_for_response
182					(mp2, cl_data->sensor_idx[i], SENSOR_ENABLED);
183			if (status == SENSOR_ENABLED)
184				cl_data->sensor_sts[i] = SENSOR_ENABLED;
185			dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n",
186				cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
187				cl_data->sensor_sts[i]);
188		}
189	}
190
191	schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
192	amd_sfh_clear_intr(mp2);
193}
194
195static void amd_sfh_suspend(struct amd_mp2_dev *mp2)
196{
197	struct amdtp_cl_data *cl_data = mp2->cl_data;
198	int i, status;
199
200	for (i = 0; i < cl_data->num_hid_devices; i++) {
201		if (cl_data->sensor_idx[i] != HPD_IDX &&
202		    cl_data->sensor_sts[i] == SENSOR_ENABLED) {
203			mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
204			status = amd_sfh_wait_for_response
205					(mp2, cl_data->sensor_idx[i], SENSOR_DISABLED);
206			if (status != SENSOR_ENABLED)
207				cl_data->sensor_sts[i] = SENSOR_DISABLED;
208			dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n",
209				cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
210				cl_data->sensor_sts[i]);
211		}
212	}
213
214	cancel_delayed_work_sync(&cl_data->work_buffer);
215	amd_sfh_clear_intr(mp2);
216}
217
218int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
219{
220	struct amd_input_data *in_data = &privdata->in_data;
221	struct amdtp_cl_data *cl_data = privdata->cl_data;
222	struct amd_mp2_ops *mp2_ops = privdata->mp2_ops;
223	struct amd_mp2_sensor_info info;
224	struct request_list *req_list;
225	struct device *dev;
226	u32 feature_report_size;
227	u32 input_report_size;
228	int rc, i;
229	u8 cl_idx;
230
231	req_list = &cl_data->req_list;
232	dev = &privdata->pdev->dev;
233	amd_sfh_set_desc_ops(mp2_ops);
234
235	mp2_ops->suspend = amd_sfh_suspend;
236	mp2_ops->resume = amd_sfh_resume;
237
238	cl_data->num_hid_devices = amd_mp2_get_sensor_num(privdata, &cl_data->sensor_idx[0]);
239	if (cl_data->num_hid_devices == 0)
240		return -ENODEV;
241	cl_data->is_any_sensor_enabled = false;
242
243	INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work);
244	INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer);
245	INIT_LIST_HEAD(&req_list->list);
246	cl_data->in_data = in_data;
247
248	for (i = 0; i < cl_data->num_hid_devices; i++) {
249		in_data->sensor_virt_addr[i] = dmam_alloc_coherent(dev, sizeof(int) * 8,
250								   &cl_data->sensor_dma_addr[i],
251								   GFP_KERNEL);
252		if (!in_data->sensor_virt_addr[i]) {
253			rc = -ENOMEM;
254			goto cleanup;
255		}
256
257		if (cl_data->sensor_idx[i] == op_idx) {
258			info.period = AMD_SFH_IDLE_LOOP;
259			info.sensor_idx = cl_data->sensor_idx[i];
260			info.dma_address = cl_data->sensor_dma_addr[i];
261			mp2_ops->start(privdata, info);
262			cl_data->sensor_sts[i] = amd_sfh_wait_for_response(privdata,
263									   cl_data->sensor_idx[i],
264									   SENSOR_ENABLED);
265			if (cl_data->sensor_sts[i] == SENSOR_ENABLED)
266				cl_data->is_any_sensor_enabled = true;
267			continue;
268		}
269
270		cl_data->sensor_sts[i] = SENSOR_DISABLED;
271		cl_data->sensor_requested_cnt[i] = 0;
272		cl_data->cur_hid_dev = i;
273		cl_idx = cl_data->sensor_idx[i];
274		cl_data->report_descr_sz[i] = mp2_ops->get_desc_sz(cl_idx, descr_size);
275		if (!cl_data->report_descr_sz[i]) {
276			rc = -EINVAL;
277			goto cleanup;
278		}
279		feature_report_size = mp2_ops->get_desc_sz(cl_idx, feature_size);
280		if (!feature_report_size) {
281			rc = -EINVAL;
282			goto cleanup;
283		}
284		input_report_size =  mp2_ops->get_desc_sz(cl_idx, input_size);
285		if (!input_report_size) {
286			rc = -EINVAL;
287			goto cleanup;
288		}
289		cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL);
290		if (!cl_data->feature_report[i]) {
291			rc = -ENOMEM;
292			goto cleanup;
293		}
294		in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL);
295		if (!in_data->input_report[i]) {
296			rc = -ENOMEM;
297			goto cleanup;
298		}
299		info.period = AMD_SFH_IDLE_LOOP;
300		info.sensor_idx = cl_idx;
301		info.dma_address = cl_data->sensor_dma_addr[i];
302
303		cl_data->report_descr[i] =
304			devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL);
305		if (!cl_data->report_descr[i]) {
306			rc = -ENOMEM;
307			goto cleanup;
308		}
309		rc = mp2_ops->get_rep_desc(cl_idx, cl_data->report_descr[i]);
310		if (rc)
311			goto cleanup;
312		mp2_ops->start(privdata, info);
313		cl_data->sensor_sts[i] = amd_sfh_wait_for_response
314						(privdata, cl_data->sensor_idx[i], SENSOR_ENABLED);
315
316		if (cl_data->sensor_sts[i] == SENSOR_ENABLED)
317			cl_data->is_any_sensor_enabled = true;
318	}
319
320	if (!cl_data->is_any_sensor_enabled ||
321	    (mp2_ops->discovery_status && mp2_ops->discovery_status(privdata) == 0)) {
322		dev_warn(dev, "Failed to discover, sensors not enabled is %d\n",
323			 cl_data->is_any_sensor_enabled);
324		rc = -EOPNOTSUPP;
325		goto cleanup;
326	}
327
328	for (i = 0; i < cl_data->num_hid_devices; i++) {
329		cl_data->cur_hid_dev = i;
330		if (cl_data->sensor_idx[i] == op_idx) {
331			dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
332				cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
333				cl_data->sensor_sts[i]);
334			continue;
335		}
336
337		if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
338			rc = amdtp_hid_probe(i, cl_data);
339			if (rc)
340				goto cleanup;
341		} else {
342			cl_data->sensor_sts[i] = SENSOR_DISABLED;
343		}
344		dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
345			cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
346			cl_data->sensor_sts[i]);
347	}
348
349	schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
350	return 0;
351
352cleanup:
353	amd_sfh_hid_client_deinit(privdata);
354	for (i = 0; i < cl_data->num_hid_devices; i++) {
355		devm_kfree(dev, cl_data->feature_report[i]);
356		devm_kfree(dev, in_data->input_report[i]);
357		devm_kfree(dev, cl_data->report_descr[i]);
358	}
359	return rc;
360}
361
362int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata)
363{
364	struct amdtp_cl_data *cl_data = privdata->cl_data;
365	int i, status;
366
367	for (i = 0; i < cl_data->num_hid_devices; i++) {
368		if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
369			privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
370			status = amd_sfh_wait_for_response
371					(privdata, cl_data->sensor_idx[i], SENSOR_DISABLED);
372			if (status != SENSOR_ENABLED)
373				cl_data->sensor_sts[i] = SENSOR_DISABLED;
374			dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x (%s) status 0x%x\n",
375				cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
376				cl_data->sensor_sts[i]);
377		}
378	}
379
380	cancel_delayed_work_sync(&cl_data->work);
381	cancel_delayed_work_sync(&cl_data->work_buffer);
382	amdtp_hid_remove(cl_data);
383
384	return 0;
385}