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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* AMD SFH Client Layer
* Copyright 2020 Advanced Micro Devices, Inc.
* Authors: Nehal Bakulchandra Shah <Nehal-Bakulchandra.Shah@amd.com>
* Sandeep Singh <Sandeep.singh@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"
#define AMD_SFH_IDLE_LOOP 200
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;
goto cleanup;
}
}
}
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;
}
}
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;
}
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