drivers/hid/amd-sfh-hid/amd_sfh_client.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  AMD SFH Client Layer
  *  Copyright 2020-2021 Advanced Micro Devices, Inc.
  *  Authors: Nehal Bakulchandra Shah <Nehal-Bakulchandra.Shah@amd.com>
  *	     Sandeep Singh <Sandeep.singh@amd.com>
  *	     Basavaraj Natikar <Basavaraj.Natikar@amd.com>
  */

 #include <linux/dma-mapping.h>
 #include <linux/hid.h>
 #include <linux/list.h>
 #include <linux/slab.h>
 #include <linux/workqueue.h>
 #include <linux/errno.h>

 #include "hid_descriptor/amd_sfh_hid_desc.h"
 #include "amd_sfh_pcie.h"
 #include "amd_sfh_hid.h"


 struct request_list {
 	struct hid_device *hid;
 	struct list_head list;
 	u8 report_id;
 	u8 sensor_idx;
 	u8 report_type;
 	u8 current_index;
 };

 static struct request_list req_list;

 void amd_sfh_set_report(struct hid_device *hid, int report_id,
 			int report_type)
 {
 	struct amdtp_hid_data *hid_data = hid->driver_data;
 	struct amdtp_cl_data *cli_data = hid_data->cli_data;
 	int i;

 	for (i = 0; i < cli_data->num_hid_devices; i++) {
 		if (cli_data->hid_sensor_hubs[i] == hid) {
 			cli_data->cur_hid_dev = i;
 			break;
 		}
 	}
 	amdtp_hid_wakeup(hid);
 }

 int amd_sfh_get_report(struct hid_device *hid, int report_id, int report_type)
 {
 	struct amdtp_hid_data *hid_data = hid->driver_data;
 	struct amdtp_cl_data *cli_data = hid_data->cli_data;
 	int i;

 	for (i = 0; i < cli_data->num_hid_devices; i++) {
 		if (cli_data->hid_sensor_hubs[i] == hid) {
 			struct request_list *new = kzalloc(sizeof(*new), GFP_KERNEL);

 			if (!new)
 				return -ENOMEM;

 			new->current_index = i;
 			new->sensor_idx = cli_data->sensor_idx[i];
 			new->hid = hid;
 			new->report_type = report_type;
 			new->report_id = report_id;
 			cli_data->report_id[i] = report_id;
 			cli_data->request_done[i] = false;
 			list_add(&new->list, &req_list.list);
 			break;
 		}
 	}
 	schedule_delayed_work(&cli_data->work, 0);
 	return 0;
 }

 static void amd_sfh_work(struct work_struct *work)
 {
 	struct amdtp_cl_data *cli_data = container_of(work, struct amdtp_cl_data, work.work);
 	struct amd_input_data *in_data = cli_data->in_data;
 	struct request_list *req_node;
 	u8 current_index, sensor_index;
 	u8 report_id, node_type;
 	u8 report_size = 0;

 	req_node = list_last_entry(&req_list.list, struct request_list, list);
 	list_del(&req_node->list);
 	current_index = req_node->current_index;
 	sensor_index = req_node->sensor_idx;
 	report_id = req_node->report_id;
 	node_type = req_node->report_type;
 	kfree(req_node);

 	if (node_type == HID_FEATURE_REPORT) {
 		report_size = get_feature_report(sensor_index, report_id,
 						 cli_data->feature_report[current_index]);
 		if (report_size)
 			hid_input_report(cli_data->hid_sensor_hubs[current_index],
 					 cli_data->report_type[current_index],
 					 cli_data->feature_report[current_index], report_size, 0);
 		else
 			pr_err("AMDSFH: Invalid report size\n");

 	} else if (node_type == HID_INPUT_REPORT) {
 		report_size = get_input_report(current_index, sensor_index, report_id, in_data);
 		if (report_size)
 			hid_input_report(cli_data->hid_sensor_hubs[current_index],
 					 cli_data->report_type[current_index],
 					 in_data->input_report[current_index], report_size, 0);
 		else
 			pr_err("AMDSFH: Invalid report size\n");
 	}
 	cli_data->cur_hid_dev = current_index;
 	cli_data->sensor_requested_cnt[current_index] = 0;
 	amdtp_hid_wakeup(cli_data->hid_sensor_hubs[current_index]);
 }

 static void amd_sfh_work_buffer(struct work_struct *work)
 {
 	struct amdtp_cl_data *cli_data = container_of(work, struct amdtp_cl_data, work_buffer.work);
 	struct amd_input_data *in_data = cli_data->in_data;
 	u8 report_size;
 	int i;

 	for (i = 0; i < cli_data->num_hid_devices; i++) {
 		if (cli_data->sensor_sts[i] == SENSOR_ENABLED) {
 			report_size = get_input_report
 				(i, cli_data->sensor_idx[i], cli_data->report_id[i], in_data);
 			hid_input_report(cli_data->hid_sensor_hubs[i], HID_INPUT_REPORT,
 					 in_data->input_report[i], report_size, 0);
 		}
 	}
 	schedule_delayed_work(&cli_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
 }

 u32 amd_sfh_wait_for_response(struct amd_mp2_dev *mp2, u8 sid, u32 sensor_sts)
 {
 	if (mp2->mp2_ops->response)
 		sensor_sts = mp2->mp2_ops->response(mp2, sid, sensor_sts);

 	return sensor_sts;
 }

 int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
 {
 	struct amd_input_data *in_data = &privdata->in_data;
 	struct amdtp_cl_data *cl_data = privdata->cl_data;
 	struct amd_mp2_sensor_info info;
 	struct device *dev;
 	u32 feature_report_size;
 	u32 input_report_size;
 	int rc, i, status;
 	u8 cl_idx;

 	dev = &privdata->pdev->dev;

 	cl_data->num_hid_devices = amd_mp2_get_sensor_num(privdata, &cl_data->sensor_idx[0]);

 	INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work);
 	INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer);
 	INIT_LIST_HEAD(&req_list.list);
 	cl_data->in_data = in_data;

 	for (i = 0; i < cl_data->num_hid_devices; i++) {
 		in_data->sensor_virt_addr[i] = dma_alloc_coherent(dev, sizeof(int) * 8,
 								  &cl_data->sensor_dma_addr[i],
 								  GFP_KERNEL);
 		cl_data->sensor_sts[i] = SENSOR_DISABLED;
 		cl_data->sensor_requested_cnt[i] = 0;
 		cl_data->cur_hid_dev = i;
 		cl_idx = cl_data->sensor_idx[i];
 		cl_data->report_descr_sz[i] = get_descr_sz(cl_idx, descr_size);
 		if (!cl_data->report_descr_sz[i]) {
 			rc = -EINVAL;
 			goto cleanup;
 		}
 		feature_report_size = get_descr_sz(cl_idx, feature_size);
 		if (!feature_report_size) {
 			rc = -EINVAL;
 			goto cleanup;
 		}
 		input_report_size =  get_descr_sz(cl_idx, input_size);
 		if (!input_report_size) {
 			rc = -EINVAL;
 			goto cleanup;
 		}
 		cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL);
 		if (!cl_data->feature_report[i]) {
 			rc = -ENOMEM;
 			goto cleanup;
 		}
 		in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL);
 		if (!in_data->input_report[i]) {
 			rc = -ENOMEM;
 			goto cleanup;
 		}
 		info.period = AMD_SFH_IDLE_LOOP;
 		info.sensor_idx = cl_idx;
 		info.dma_address = cl_data->sensor_dma_addr[i];

 		cl_data->report_descr[i] =
 			devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL);
 		if (!cl_data->report_descr[i]) {
 			rc = -ENOMEM;
 			goto cleanup;
 		}
 		rc = get_report_descriptor(cl_idx, cl_data->report_descr[i]);
 		if (rc)
 			return rc;
 		privdata->mp2_ops->start(privdata, info);
 		status = amd_sfh_wait_for_response
 				(privdata, cl_data->sensor_idx[i], SENSOR_ENABLED);
 		if (status == SENSOR_ENABLED) {
 			cl_data->sensor_sts[i] = SENSOR_ENABLED;
 			rc = amdtp_hid_probe(cl_data->cur_hid_dev, cl_data);
 			if (rc) {
 				privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
 				status = amd_sfh_wait_for_response
 					(privdata, cl_data->sensor_idx[i], SENSOR_DISABLED);
 				if (status != SENSOR_ENABLED)
 					cl_data->sensor_sts[i] = SENSOR_DISABLED;
 				dev_dbg(dev, "sid 0x%x status 0x%x\n",
 					cl_data->sensor_idx[i], cl_data->sensor_sts[i]);
 				goto cleanup;
 			}
 		}
 		dev_dbg(dev, "sid 0x%x status 0x%x\n",
 			cl_data->sensor_idx[i], cl_data->sensor_sts[i]);
 	}
 	schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
 	return 0;

 cleanup:
 	for (i = 0; i < cl_data->num_hid_devices; i++) {
 		if (in_data->sensor_virt_addr[i]) {
 			dma_free_coherent(&privdata->pdev->dev, 8 * sizeof(int),
 					  in_data->sensor_virt_addr[i],
 					  cl_data->sensor_dma_addr[i]);
 		}
 		devm_kfree(dev, cl_data->feature_report[i]);
 		devm_kfree(dev, in_data->input_report[i]);
 		devm_kfree(dev, cl_data->report_descr[i]);
 	}
 	return rc;
 }

 int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata)
 {
 	struct amdtp_cl_data *cl_data = privdata->cl_data;
 	struct amd_input_data *in_data = cl_data->in_data;
 	int i, status;

 	for (i = 0; i < cl_data->num_hid_devices; i++) {
 		if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
 			privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
 			status = amd_sfh_wait_for_response
 					(privdata, cl_data->sensor_idx[i], SENSOR_DISABLED);
 			if (status != SENSOR_ENABLED)
 				cl_data->sensor_sts[i] = SENSOR_DISABLED;
 			dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x status 0x%x\n",
 				cl_data->sensor_idx[i], cl_data->sensor_sts[i]);
 		}
 	}

 	cancel_delayed_work_sync(&cl_data->work);
 	cancel_delayed_work_sync(&cl_data->work_buffer);
 	amdtp_hid_remove(cl_data);

 	for (i = 0; i < cl_data->num_hid_devices; i++) {
 		if (in_data->sensor_virt_addr[i]) {
 			dma_free_coherent(&privdata->pdev->dev, 8 * sizeof(int),
 					  in_data->sensor_virt_addr[i],
 					  cl_data->sensor_dma_addr[i]);
 		}
 	}
 	return 0;
 }
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* AMD SFH Client Layer
	* Copyright 2020-2021 Advanced Micro Devices, Inc.
	* Authors: Nehal Bakulchandra Shah <Nehal-Bakulchandra.Shah@amd.com>
	* Sandeep Singh <Sandeep.singh@amd.com>
	* Basavaraj Natikar <Basavaraj.Natikar@amd.com>
	*/

	#include <linux/dma-mapping.h>
	#include <linux/hid.h>
	#include <linux/list.h>
	#include <linux/slab.h>
	#include <linux/workqueue.h>
	#include <linux/errno.h>

	#include "hid_descriptor/amd_sfh_hid_desc.h"
	#include "amd_sfh_pcie.h"
	#include "amd_sfh_hid.h"


	struct request_list {
	struct hid_device *hid;
	struct list_head list;
	u8 report_id;
	u8 sensor_idx;
	u8 report_type;
	u8 current_index;
	};

	static struct request_list req_list;

	void amd_sfh_set_report(struct hid_device *hid, int report_id,
	int report_type)
	{
	struct amdtp_hid_data *hid_data = hid->driver_data;
	struct amdtp_cl_data *cli_data = hid_data->cli_data;
	int i;

	for (i = 0; i < cli_data->num_hid_devices; i++) {
	if (cli_data->hid_sensor_hubs[i] == hid) {
	cli_data->cur_hid_dev = i;
	break;
	}
	}
	amdtp_hid_wakeup(hid);
	}

	int amd_sfh_get_report(struct hid_device *hid, int report_id, int report_type)
	{
	struct amdtp_hid_data *hid_data = hid->driver_data;
	struct amdtp_cl_data *cli_data = hid_data->cli_data;
	int i;

	for (i = 0; i < cli_data->num_hid_devices; i++) {
	if (cli_data->hid_sensor_hubs[i] == hid) {
	struct request_list new = kzalloc(sizeof(new), GFP_KERNEL);

	if (!new)
	return -ENOMEM;

	new->current_index = i;
	new->sensor_idx = cli_data->sensor_idx[i];
	new->hid = hid;
	new->report_type = report_type;
	new->report_id = report_id;
	cli_data->report_id[i] = report_id;
	cli_data->request_done[i] = false;
	list_add(&new->list, &req_list.list);
	break;
	}
	}
	schedule_delayed_work(&cli_data->work, 0);
	return 0;
	}

	static void amd_sfh_work(struct work_struct *work)
	{
	struct amdtp_cl_data *cli_data = container_of(work, struct amdtp_cl_data, work.work);
	struct amd_input_data *in_data = cli_data->in_data;
	struct request_list *req_node;
	u8 current_index, sensor_index;
	u8 report_id, node_type;
	u8 report_size = 0;

	req_node = list_last_entry(&req_list.list, struct request_list, list);
	list_del(&req_node->list);
	current_index = req_node->current_index;
	sensor_index = req_node->sensor_idx;
	report_id = req_node->report_id;
	node_type = req_node->report_type;
	kfree(req_node);

	if (node_type == HID_FEATURE_REPORT) {
	report_size = get_feature_report(sensor_index, report_id,
	cli_data->feature_report[current_index]);
	if (report_size)
	hid_input_report(cli_data->hid_sensor_hubs[current_index],
	cli_data->report_type[current_index],
	cli_data->feature_report[current_index], report_size, 0);
	else
	pr_err("AMDSFH: Invalid report size\n");

	} else if (node_type == HID_INPUT_REPORT) {
	report_size = get_input_report(current_index, sensor_index, report_id, in_data);
	if (report_size)
	hid_input_report(cli_data->hid_sensor_hubs[current_index],
	cli_data->report_type[current_index],
	in_data->input_report[current_index], report_size, 0);
	else
	pr_err("AMDSFH: Invalid report size\n");
	}
	cli_data->cur_hid_dev = current_index;
	cli_data->sensor_requested_cnt[current_index] = 0;
	amdtp_hid_wakeup(cli_data->hid_sensor_hubs[current_index]);
	}

	static void amd_sfh_work_buffer(struct work_struct *work)
	{
	struct amdtp_cl_data *cli_data = container_of(work, struct amdtp_cl_data, work_buffer.work);
	struct amd_input_data *in_data = cli_data->in_data;
	u8 report_size;
	int i;

	for (i = 0; i < cli_data->num_hid_devices; i++) {
	if (cli_data->sensor_sts[i] == SENSOR_ENABLED) {
	report_size = get_input_report
	(i, cli_data->sensor_idx[i], cli_data->report_id[i], in_data);
	hid_input_report(cli_data->hid_sensor_hubs[i], HID_INPUT_REPORT,
	in_data->input_report[i], report_size, 0);
	}
	}
	schedule_delayed_work(&cli_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
	}

	u32 amd_sfh_wait_for_response(struct amd_mp2_dev *mp2, u8 sid, u32 sensor_sts)
	{
	if (mp2->mp2_ops->response)
	sensor_sts = mp2->mp2_ops->response(mp2, sid, sensor_sts);

	return sensor_sts;
	}

	int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
	{
	struct amd_input_data *in_data = &privdata->in_data;
	struct amdtp_cl_data *cl_data = privdata->cl_data;
	struct amd_mp2_sensor_info info;
	struct device *dev;
	u32 feature_report_size;
	u32 input_report_size;
	int rc, i, status;
	u8 cl_idx;

	dev = &privdata->pdev->dev;

	cl_data->num_hid_devices = amd_mp2_get_sensor_num(privdata, &cl_data->sensor_idx[0]);

	INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work);
	INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer);
	INIT_LIST_HEAD(&req_list.list);
	cl_data->in_data = in_data;

	for (i = 0; i < cl_data->num_hid_devices; i++) {
	in_data->sensor_virt_addr[i] = dma_alloc_coherent(dev, sizeof(int) * 8,
	&cl_data->sensor_dma_addr[i],
	GFP_KERNEL);
	cl_data->sensor_sts[i] = SENSOR_DISABLED;
	cl_data->sensor_requested_cnt[i] = 0;
	cl_data->cur_hid_dev = i;
	cl_idx = cl_data->sensor_idx[i];
	cl_data->report_descr_sz[i] = get_descr_sz(cl_idx, descr_size);
	if (!cl_data->report_descr_sz[i]) {
	rc = -EINVAL;
	goto cleanup;
	}
	feature_report_size = get_descr_sz(cl_idx, feature_size);
	if (!feature_report_size) {
	rc = -EINVAL;
	goto cleanup;
	}
	input_report_size = get_descr_sz(cl_idx, input_size);
	if (!input_report_size) {
	rc = -EINVAL;
	goto cleanup;
	}
	cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL);
	if (!cl_data->feature_report[i]) {
	rc = -ENOMEM;
	goto cleanup;
	}
	in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL);
	if (!in_data->input_report[i]) {
	rc = -ENOMEM;
	goto cleanup;
	}
	info.period = AMD_SFH_IDLE_LOOP;
	info.sensor_idx = cl_idx;
	info.dma_address = cl_data->sensor_dma_addr[i];

	cl_data->report_descr[i] =
	devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL);
	if (!cl_data->report_descr[i]) {
	rc = -ENOMEM;
	goto cleanup;
	}
	rc = get_report_descriptor(cl_idx, cl_data->report_descr[i]);
	if (rc)
	return rc;
	privdata->mp2_ops->start(privdata, info);
	status = amd_sfh_wait_for_response
	(privdata, cl_data->sensor_idx[i], SENSOR_ENABLED);
	if (status == SENSOR_ENABLED) {
	cl_data->sensor_sts[i] = SENSOR_ENABLED;
	rc = amdtp_hid_probe(cl_data->cur_hid_dev, cl_data);
	if (rc) {
	privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
	status = amd_sfh_wait_for_response
	(privdata, cl_data->sensor_idx[i], SENSOR_DISABLED);
	if (status != SENSOR_ENABLED)
	cl_data->sensor_sts[i] = SENSOR_DISABLED;
	dev_dbg(dev, "sid 0x%x status 0x%x\n",
	cl_data->sensor_idx[i], cl_data->sensor_sts[i]);
	goto cleanup;
	}
	}
	dev_dbg(dev, "sid 0x%x status 0x%x\n",
	cl_data->sensor_idx[i], cl_data->sensor_sts[i]);
	}
	schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
	return 0;

	cleanup:
	for (i = 0; i < cl_data->num_hid_devices; i++) {
	if (in_data->sensor_virt_addr[i]) {
	dma_free_coherent(&privdata->pdev->dev, 8 * sizeof(int),
	in_data->sensor_virt_addr[i],
	cl_data->sensor_dma_addr[i]);
	}
	devm_kfree(dev, cl_data->feature_report[i]);
	devm_kfree(dev, in_data->input_report[i]);
	devm_kfree(dev, cl_data->report_descr[i]);
	}
	return rc;
	}

	int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata)
	{
	struct amdtp_cl_data *cl_data = privdata->cl_data;
	struct amd_input_data *in_data = cl_data->in_data;
	int i, status;

	for (i = 0; i < cl_data->num_hid_devices; i++) {
	if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
	privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
	status = amd_sfh_wait_for_response
	(privdata, cl_data->sensor_idx[i], SENSOR_DISABLED);
	if (status != SENSOR_ENABLED)
	cl_data->sensor_sts[i] = SENSOR_DISABLED;
	dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x status 0x%x\n",
	cl_data->sensor_idx[i], cl_data->sensor_sts[i]);
	}
	}

	cancel_delayed_work_sync(&cl_data->work);
	cancel_delayed_work_sync(&cl_data->work_buffer);
	amdtp_hid_remove(cl_data);

	for (i = 0; i < cl_data->num_hid_devices; i++) {
	if (in_data->sensor_virt_addr[i]) {
	dma_free_coherent(&privdata->pdev->dev, 8 * sizeof(int),
	in_data->sensor_virt_addr[i],
	cl_data->sensor_dma_addr[i]);
	}
	}
	return 0;
	}