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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* AMD MP2 1.1 communication driver
*
* Copyright (c) 2022, Advanced Micro Devices, Inc.
* All Rights Reserved.
*
* Author: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
*/
#include <linux/delay.h>
#include <linux/hid.h>
#include "amd_sfh_init.h"
#include "amd_sfh_interface.h"
#include "../hid_descriptor/amd_sfh_hid_desc.h"
static int amd_sfh_get_sensor_num(struct amd_mp2_dev *mp2, u8 *sensor_id)
{
struct sfh_sensor_list *slist;
struct sfh_base_info binfo;
int num_of_sensors = 0;
int i;
memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info));
slist = &binfo.sbase.s_list;
for (i = 0; i < MAX_IDX; i++) {
switch (i) {
case ACCEL_IDX:
case GYRO_IDX:
case MAG_IDX:
case ALS_IDX:
case HPD_IDX:
if (BIT(i) & slist->sl.sensors)
sensor_id[num_of_sensors++] = i;
break;
}
}
return num_of_sensors;
}
static u32 amd_sfh_wait_for_response(struct amd_mp2_dev *mp2, u8 sid, u32 cmd_id)
{
if (mp2->mp2_ops->response)
return mp2->mp2_ops->response(mp2, sid, cmd_id);
return 0;
}
static const char *get_sensor_name(int idx)
{
switch (idx) {
case ACCEL_IDX:
return "accelerometer";
case GYRO_IDX:
return "gyroscope";
case MAG_IDX:
return "magnetometer";
case ALS_IDX:
return "ALS";
case HPD_IDX:
return "HPD";
default:
return "unknown sensor type";
}
}
static int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata)
{
struct amdtp_cl_data *cl_data = privdata->cl_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], DISABLE_SENSOR);
if (status == 0)
cl_data->sensor_sts[i] = SENSOR_DISABLED;
dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x (%s) status 0x%x\n",
cl_data->sensor_idx[i], get_sensor_name(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);
return 0;
}
static int amd_sfh1_1_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_ops *mp2_ops = privdata->mp2_ops;
struct amd_mp2_sensor_info info;
struct request_list *req_list;
u32 feature_report_size;
u32 input_report_size;
struct device *dev;
int rc, i, status;
u8 cl_idx;
req_list = &cl_data->req_list;
dev = &privdata->pdev->dev;
amd_sfh1_1_set_desc_ops(mp2_ops);
cl_data->num_hid_devices = amd_sfh_get_sensor_num(privdata, &cl_data->sensor_idx[0]);
if (cl_data->num_hid_devices == 0)
return -ENODEV;
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++) {
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] = mp2_ops->get_desc_sz(cl_idx, descr_size);
if (!cl_data->report_descr_sz[i]) {
rc = -EINVAL;
goto cleanup;
}
feature_report_size = mp2_ops->get_desc_sz(cl_idx, feature_size);
if (!feature_report_size) {
rc = -EINVAL;
goto cleanup;
}
input_report_size = mp2_ops->get_desc_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.sensor_idx = cl_idx;
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 = mp2_ops->get_rep_desc(cl_idx, cl_data->report_descr[i]);
if (rc)
return rc;
writel(0, privdata->mmio + AMD_P2C_MSG(0));
mp2_ops->start(privdata, info);
status = amd_sfh_wait_for_response
(privdata, cl_data->sensor_idx[i], ENABLE_SENSOR);
status = (status == 0) ? SENSOR_ENABLED : SENSOR_DISABLED;
if (status == SENSOR_ENABLED) {
cl_data->sensor_sts[i] = SENSOR_ENABLED;
rc = amdtp_hid_probe(i, cl_data);
if (rc) {
mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
status = amd_sfh_wait_for_response
(privdata, cl_data->sensor_idx[i], DISABLE_SENSOR);
if (status == 0)
status = SENSOR_DISABLED;
if (status != SENSOR_ENABLED)
cl_data->sensor_sts[i] = SENSOR_DISABLED;
dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
cl_data->sensor_idx[i],
get_sensor_name(cl_data->sensor_idx[i]),
cl_data->sensor_sts[i]);
goto cleanup;
}
}
dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
cl_data->sensor_idx[i], get_sensor_name(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:
amd_sfh_hid_client_deinit(privdata);
for (i = 0; i < cl_data->num_hid_devices; 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;
}
static void amd_sfh_resume(struct amd_mp2_dev *mp2)
{
struct amdtp_cl_data *cl_data = mp2->cl_data;
struct amd_mp2_sensor_info info;
int i, status;
for (i = 0; i < cl_data->num_hid_devices; i++) {
if (cl_data->sensor_sts[i] == SENSOR_DISABLED) {
info.sensor_idx = cl_data->sensor_idx[i];
mp2->mp2_ops->start(mp2, info);
status = amd_sfh_wait_for_response
(mp2, cl_data->sensor_idx[i], ENABLE_SENSOR);
if (status == 0)
status = SENSOR_ENABLED;
if (status == SENSOR_ENABLED)
cl_data->sensor_sts[i] = SENSOR_ENABLED;
dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n",
cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
cl_data->sensor_sts[i]);
}
}
schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
amd_sfh_clear_intr(mp2);
}
static void amd_sfh_suspend(struct amd_mp2_dev *mp2)
{
struct amdtp_cl_data *cl_data = mp2->cl_data;
int i, status;
for (i = 0; i < cl_data->num_hid_devices; i++) {
if (cl_data->sensor_idx[i] != HPD_IDX &&
cl_data->sensor_sts[i] == SENSOR_ENABLED) {
mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
status = amd_sfh_wait_for_response
(mp2, cl_data->sensor_idx[i], DISABLE_SENSOR);
if (status == 0)
status = SENSOR_DISABLED;
if (status != SENSOR_ENABLED)
cl_data->sensor_sts[i] = SENSOR_DISABLED;
dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n",
cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
cl_data->sensor_sts[i]);
}
}
cancel_delayed_work_sync(&cl_data->work_buffer);
amd_sfh_clear_intr(mp2);
}
static void amd_mp2_pci_remove(void *privdata)
{
struct amd_mp2_dev *mp2 = privdata;
amd_sfh_hid_client_deinit(privdata);
mp2->mp2_ops->stop_all(mp2);
pci_intx(mp2->pdev, false);
amd_sfh_clear_intr(mp2);
}
static void amd_sfh_set_ops(struct amd_mp2_dev *mp2)
{
struct amd_mp2_ops *mp2_ops;
sfh_interface_init(mp2);
mp2_ops = mp2->mp2_ops;
mp2_ops->clear_intr = amd_sfh_clear_intr_v2,
mp2_ops->init_intr = amd_sfh_irq_init_v2,
mp2_ops->suspend = amd_sfh_suspend;
mp2_ops->resume = amd_sfh_resume;
mp2_ops->remove = amd_mp2_pci_remove;
}
int amd_sfh1_1_init(struct amd_mp2_dev *mp2)
{
u32 phy_base = readl(mp2->mmio + AMD_C2P_MSG(22));
struct device *dev = &mp2->pdev->dev;
struct sfh_base_info binfo;
int rc;
phy_base <<= 21;
if (!devm_request_mem_region(dev, phy_base, 128 * 1024, "amd_sfh")) {
dev_dbg(dev, "can't reserve mmio registers\n");
return -ENOMEM;
}
mp2->vsbase = devm_ioremap(dev, phy_base, 128 * 1024);
if (!mp2->vsbase) {
dev_dbg(dev, "failed to remap vsbase\n");
return -ENOMEM;
}
/* Before accessing give time for SFH firmware for processing configuration */
msleep(5000);
memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info));
if (binfo.sbase.fw_info.fw_ver == 0 || binfo.sbase.s_list.sl.sensors == 0) {
dev_dbg(dev, "failed to get sensors\n");
return -EOPNOTSUPP;
}
dev_dbg(dev, "firmware version 0x%x\n", binfo.sbase.fw_info.fw_ver);
amd_sfh_set_ops(mp2);
rc = amd_sfh_irq_init(mp2);
if (rc) {
dev_err(dev, "amd_sfh_irq_init failed\n");
return rc;
}
rc = amd_sfh1_1_hid_client_init(mp2);
if (rc) {
dev_err(dev, "amd_sfh1_1_hid_client_init failed\n");
return rc;
}
return rc;
}
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