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Message-ID: <5eb0bed279933a259f7a82314abf1d83246aa602.camel@linux.intel.com>
Date: Mon, 03 Feb 2020 06:58:27 -0800
From: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To: Sandeep Singh <Sandeep.Singh@....com>, jikos@...nel.org,
benjamin.tissoires@...hat.com, linux-kernel@...r.kernel.org,
linux-input@...r.kernel.org, jic23@...nel.org,
linux-iio@...r.kernel.org
Cc: Shyam-sundar.S-k@....com,
Nehal Shah <Nehal-bakulchandra.Shah@....com>
Subject: Re: [PATCH v2 3/4] SFH: Transport Driver to add support of AMD
sensor fusion Hub (SFH)
On Wed, 2020-01-29 at 09:57 +0530, Sandeep Singh wrote:
> From: Sandeep Singh <sandeep.singh@....com>
>
> This part of module will provide the interaction between HID
> framework
> and client driver.This modules will registered client driver with
> HID framework.
>
Better to have two patches. One for debugfs specific and one client
driver.
> Signed-off-by: Sandeep Singh <sandeep.singh@....com>
> Signed-off-by: Nehal Shah <Nehal-bakulchandra.Shah@....com>
> Reported-by: kbuild test robot <lkp@...el.com>
> Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
> ---
> drivers/hid/amd-sfh-hid/amdsfh-debugfs.c | 251
> ++++++++++++++++++++++++++
> drivers/hid/amd-sfh-hid/amdsfh-debugfs.h | 14 ++
> drivers/hid/amd-sfh-hid/amdsfh-hid-client.c | 261
> ++++++++++++++++++++++++++++
> drivers/hid/amd-sfh-hid/amdsfh-hid.c | 179
> +++++++++++++++++++
> drivers/hid/amd-sfh-hid/amdsfh-hid.h | 85 +++++++++
> 5 files changed, 790 insertions(+)
> create mode 100644 drivers/hid/amd-sfh-hid/amdsfh-debugfs.c
> create mode 100644 drivers/hid/amd-sfh-hid/amdsfh-debugfs.h
> create mode 100644 drivers/hid/amd-sfh-hid/amdsfh-hid-client.c
> create mode 100644 drivers/hid/amd-sfh-hid/amdsfh-hid.c
> create mode 100644 drivers/hid/amd-sfh-hid/amdsfh-hid.h
>
> diff --git a/drivers/hid/amd-sfh-hid/amdsfh-debugfs.c
> b/drivers/hid/amd-sfh-hid/amdsfh-debugfs.c
> new file mode 100644
> index 0000000..20859d4
> --- /dev/null
> +++ b/drivers/hid/amd-sfh-hid/amdsfh-debugfs.c
> @@ -0,0 +1,251 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * AMD SFH DebugFS
> + * This part of module will provide sensors raw value data
> + * for AMD SFH debugging.
> + * cat /sys/kernel/debug/amd_sfhtp_hid
> + * Author: Nehal Bakulchandra Shah <Nehal-Bakulchandra.Shah@....com
> >
> + */
> +
> +#include <linux/slab.h>
> +#include "amd_mp2_pcie.h"
> +#include "amdsfh-debugfs.h"
> +
> +/* DebugFS helpers */
> +#define OBUFP (obuf + oboff)
> +#define OBUFLEN 512
> +#define OBUFSPC (OBUFLEN - oboff)
> +#define OSCNPRINTF(fmt, ...) \
> + scnprintf(OBUFP, OBUFSPC, fmt, ## __VA_ARGS__)
> +
> +static ssize_t amdsfh_debugfs_accel_read(struct file *filp, char
> __user *ubuf,
> + size_t count, loff_t *offp)
> +{
> + unsigned int oboff = 0, i;
> + struct amdtp_cl_data *cl_data = filp->private_data;
> + bool found = false;
> + ssize_t ret;
> + char *obuf;
> +
> + for (i = 0; i < cl_data->num_hid_devices; i++) {
> + if (cl_data->sensor_idx[i] == ACCEL_IDX) {
> + found = true;
> + break;
> + }
> + }
> +
> + if (!found)
> + return -1;
> +
> + obuf = kmalloc(OBUFLEN, GFP_KERNEL);
> + if (!obuf)
> + return -ENOMEM;
> +
> + oboff += OSCNPRINTF("Accel_X_Raw:%d\n",
> + (int)cl_data->sensor_virt_addr[i][0]);
> + oboff += OSCNPRINTF("Accel_Y_Raw:%d\n",
> + (int)cl_data->sensor_virt_addr[i][1]);
> + oboff += OSCNPRINTF("Accel_Z_Raw:%d\n",
> + (int)cl_data->sensor_virt_addr[i][2]);
> + ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);
> +
> + kfree(obuf);
> +
> + return ret;
> +}
> +
> +static ssize_t amdsfh_debugfs_gyro_read(struct file *filp, char
> __user *ubuf,
> + size_t count, loff_t *offp)
> +{
> + unsigned int oboff = 0, i;
> + bool found = false;
> + struct amdtp_cl_data *cl_data = filp->private_data;
> + ssize_t ret;
> + char *obuf;
> +
> + for (i = 0; i < cl_data->num_hid_devices; i++) {
> + if (cl_data->sensor_idx[i] == GYRO_IDX) {
> + found = true;
> + break;
> + }
> + }
> +
> + if (!found)
> + return -1;
> +
> + obuf = kmalloc(OBUFLEN, GFP_KERNEL);
> + if (!obuf)
> + return -ENOMEM;
> +
> + oboff += OSCNPRINTF("Gyro_X_Raw:%d\n",
> + (int)cl_data->sensor_virt_addr[i][0]);
> + oboff += OSCNPRINTF("Gyro_Y_Raw:%d\n",
> + (int)cl_data->sensor_virt_addr[i][1]);
> + oboff += OSCNPRINTF("Gyro_Z_Raw:%d\n",
> + (int)cl_data->sensor_virt_addr[i][2]);
> + ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);
> +
> + kfree(obuf);
> +
> + return ret;
> +}
> +
> +static ssize_t amdsfh_debugfs_mag_read(struct file *filp, char
> __user *ubuf,
> + size_t count, loff_t *offp)
> +{
> + unsigned int oboff = 0, i;
> + bool found = false;
> + ssize_t ret;
> + char *obuf;
> + struct amdtp_cl_data *cl_data = filp->private_data;
> +
> + for (i = 0; i < cl_data->num_hid_devices; i++) {
> + if (cl_data->sensor_idx[i] == MAG_IDX) {
> + found = true;
> + break;
> + }
> + }
> +
> + if (!found)
> + return -1;
> +
> + obuf = kmalloc(OBUFLEN, GFP_KERNEL);
> + if (!obuf)
> + return -ENOMEM;
> +
> + oboff += OSCNPRINTF("Mag_X_Raw:%d\n",
> + (int)cl_data->sensor_virt_addr[i][0]);
> + oboff += OSCNPRINTF("Mag_Y_Raw:%d\n",
> + (int)cl_data->sensor_virt_addr[i][1]);
> + oboff += OSCNPRINTF("Mag_Z_Raw:%d\n",
> + (int)cl_data->sensor_virt_addr[i][2]);
> + ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);
> +
> + kfree(obuf);
> +
> + return ret;
> +}
> +
> +static ssize_t amdsfh_debugfs_als_read(struct file *filp, char
> __user *ubuf,
> + size_t count, loff_t *offp)
> +{
> + unsigned int oboff = 0, i;
> + bool found = false;
> + ssize_t ret;
> + char *obuf;
> + struct amdtp_cl_data *cl_data = filp->private_data;
> +
> + for (i = 0; i < cl_data->num_hid_devices; i++) {
> + if (cl_data->sensor_idx[i] == AMBIENT_LIGHT_IDX) {
> + found = true;
> + break;
> + }
> + }
> +
> + if (!found)
> + return -1;
> +
> + obuf = kmalloc(OBUFLEN, GFP_KERNEL);
> + if (!obuf)
> + return -ENOMEM;
> +
> + oboff += OSCNPRINTF("Gyro_X_Raw:%d\n",
> + (int)cl_data->sensor_virt_addr[i][0]);
> + oboff += OSCNPRINTF("Gyro_Y_Raw:%d\n",
> + (int)cl_data->sensor_virt_addr[i][1]);
> + oboff += OSCNPRINTF("Gyro_Z_Raw:%d\n",
> + (int)cl_data->sensor_virt_addr[i][2]);
> + ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);
> +
> + kfree(obuf);
> +
> + return ret;
> +}
> +
> +static const struct file_operations amdsfh_debugfs_accel_ops = {
> + .owner = THIS_MODULE,
> + .open = simple_open,
> + .read = amdsfh_debugfs_accel_read,
> +};
> +
> +static const struct file_operations amdsfh_debugfs_gyro_ops = {
> + .owner = THIS_MODULE,
> + .open = simple_open,
> + .read = amdsfh_debugfs_gyro_read,
> +};
> +
> +static const struct file_operations amdsfh_debugfs_mag_ops = {
> + .owner = THIS_MODULE,
> + .open = simple_open,
> + .read = amdsfh_debugfs_mag_read,
> +};
> +
> +static const struct file_operations amdsfh_debugfs_als_ops = {
> + .owner = THIS_MODULE,
> + .open = simple_open,
> + .read = amdsfh_debugfs_als_read,
> +};
> +
> +int amdsfh_debugfs_setup(struct amdtp_cl_data *cl_data)
> +{
> + /* DebugFS info */
> + struct dentry *dbgfs;
> + int i;
> +
> + if (!debugfs_initialized())
> + return -1;
> +
> + if (!cl_data->amd_debugfs_dir)
> + cl_data->amd_debugfs_dir = debugfs_create_dir
> + (KBUILD_MODNAME, NULL);
> +
> + if (!cl_data->amd_debugfs_dir)
> + return -1;
> +
> + for (i = 0; i < cl_data->num_hid_devices; i++) {
> + switch (cl_data->sensor_idx[i]) {
> + case ACCEL_IDX:
> + dbgfs = debugfs_create_dir("accel",
> + cl_data-
> >amd_debugfs_dir);
> + debugfs_create_file("raw_value", 0400,
> + dbgfs, cl_data,
> + &amdsfh_debugfs_accel_ops);
> + break;
> +
> + case GYRO_IDX:
> + dbgfs = debugfs_create_dir("gyro",
> + cl_data-
> >amd_debugfs_dir);
> + debugfs_create_file("raw_value", 0400,
> + dbgfs, cl_data,
> + &amdsfh_debugfs_gyro_ops);
> + break;
> +
> + case MAG_IDX:
> + dbgfs = debugfs_create_dir("magnetometer",
> + cl_data-
> >amd_debugfs_dir);
> + debugfs_create_file("raw_value", 0400,
> + dbgfs, cl_data,
> + &amdsfh_debugfs_mag_ops);
> + break;
> +
> + case AMBIENT_LIGHT_IDX:
> + dbgfs = debugfs_create_dir("als",
> + cl_data-
> >amd_debugfs_dir);
> + debugfs_create_file("raw_value", 0400,
> + dbgfs, cl_data,
> + &amdsfh_debugfs_als_ops);
> + break;
> +
> + default:
> + return 0;
> + }
> + }
> + return 0;
> +}
> +EXPORT_SYMBOL(amdsfh_debugfs_setup);
> +
> +void amdsfh_debugfs_destroy(struct amdtp_cl_data *cl_data)
> +{
> + debugfs_remove_recursive(cl_data->amd_debugfs_dir);
> +}
> +EXPORT_SYMBOL(amdsfh_debugfs_destroy);
> diff --git a/drivers/hid/amd-sfh-hid/amdsfh-debugfs.h
> b/drivers/hid/amd-sfh-hid/amdsfh-debugfs.h
> new file mode 100644
> index 0000000..470f1f12
> --- /dev/null
> +++ b/drivers/hid/amd-sfh-hid/amdsfh-debugfs.h
> @@ -0,0 +1,14 @@
> +/* SPDX-License-Identifier: GPL-2.0
> + *
> + * AMD SFH DebugFS
> + * Author: Nehal Bakulchandra Shah <Nehal-Bakulchandra.Shah@....com
> >
> + */
> +#include "amdsfh-hid.h"
> +
> +#ifndef AMDSFH_DEBUGFS_H
> +#define AMDSFH_DEBUGFS_H
> +
> +int amdsfh_debugfs_setup(struct amdtp_cl_data *cl_data);
> +void amdsfh_debugfs_destroy(struct amdtp_cl_data *cl_data);
> +
> +#endif
> diff --git a/drivers/hid/amd-sfh-hid/amdsfh-hid-client.c
> b/drivers/hid/amd-sfh-hid/amdsfh-hid-client.c
> new file mode 100644
> index 0000000..b59cb2f
> --- /dev/null
> +++ b/drivers/hid/amd-sfh-hid/amdsfh-hid-client.c
> @@ -0,0 +1,261 @@
> +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
> +/*
> + * AMD SFH Client Driver
> + * Author: Nehal Bakulchandra Shah <Nehal-Bakulchandra.Shah@....com
> >
> + */
> +
> +#include <linux/init.h>
> +#include <linux/module.h>
> +#include <linux/kernel.h>
> +#include <linux/slab.h>
> +#include <linux/workqueue.h>
> +#include <linux/hid.h>
> +#include <linux/list.h>
> +#include <linux/platform_device.h>
> +#include <linux/acpi.h>
> +#include <linux/dma-mapping.h>
> +#include "amdsfh-hid.h"
> +#include "amd_mp2_pcie.h"
> +#include "hid_descriptor/amd_sfh_hid_descriptor.h"
> +#include "amdsfh-debugfs.h"
> +
> +#define DRIVER_DESC "AMD(R) PCIe MP2 Communication Client Driver"
> +#define DRIVER_VER "1.0"
> +#define DRIVER_NAME "AMD_SFH_HID_CLIENT"
> +#define PERIOD 200
> +
> +struct request_list {
> + u8 report_id;
> + u8 sensor_idx;
> + u8 report_type;
> + u8 current_index;
> + struct hid_device *hid;
> + struct list_head list;
> +};
> +
> +static struct request_list req_list;
> +static struct amdtp_cl_data *cl_data_context;
> +
> +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);
> +}
> +EXPORT_SYMBOL(amd_sfh_set_report);
> +
> +void 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_request = kzalloc
> + (sizeof(*new_request), GFP_KERNEL);
> + new_request->current_index = i;
> + new_request->sensor_idx = cli_data-
> >sensor_idx[i];
> + new_request->hid = hid;
> + new_request->report_type = report_type;
> + new_request->report_id = report_id;
> + cli_data->report_id[i] = report_id;
> + cli_data->request_done[i] = false;
> + list_add(&new_request->list, &req_list.list);
> + break;
> + }
> + }
> + schedule_delayed_work(&cli_data->work, 0);
> +}
> +EXPORT_SYMBOL(amd_sfh_get_report);
> +
> +static void amd_sfh_work(struct work_struct *work)
> +{
> + struct amdtp_cl_data *cli_data = amd_sfh_cldata(work);
> + struct request_list *req_node;
> + u8 report_size = 0;
> + u8 current_index;
> + u8 sensor_index;
> + u8 report_id;
> + u8 node_type;
> +
> + 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->current_index;
> + report_id = req_node->report_id;
> + node_type = req_node->report_type;
> +
> + if (node_type == HID_FEATURE_REPORT) {
> + report_size = get_feature_report(sensor_index,
> report_id,
> + cli_data-
> >feature_report
> + [current_index]);
> + } else if (node_type == HID_INPUT_REPORT) {
> + report_size = get_input_report(sensor_index, report_id,
> + cli_data->input_report
> + [current_index],
> + cli_data-
> >sensor_virt_addr
> + [current_index]);
> + }
> +
> + hid_input_report(cli_data->hid_sensor_hubs[current_index],
> + cli_data->report_type[current_index],
> + cli_data->input_report[current_index],
> + report_size, 0);
> + cli_data->cur_hid_dev = current_index;
> + cli_data->sensor_requested_cnt[current_index] = 0;
> + kfree(req_node);
> + 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 = cl_data_context;
> + unsigned int i;
> + u8 report_size = 0;
> +
> + for (i = 0; i < cli_data->num_hid_devices; i++) {
> + report_size = get_input_report(cli_data->sensor_idx[i],
> + cli_data->report_id[i],
> + cli_data->input_report[i],
> + cli_data->sensor_virt_addr[i]);
> + hid_input_report(cli_data->hid_sensor_hubs[i],
> + HID_INPUT_REPORT,
> + cli_data->input_report[i],
> report_size, 0);
> + }
> +
> + schedule_delayed_work(&cli_data->work_buffer, PERIOD);
> +}
> +
> +static int amd_sfh_hid_client_probe(struct platform_device *pdev)
> +{
> + struct amd_mp2_sensor_info info;
> + int rc = 0;
> + int i;
> + struct amdtp_cl_device *cl_dev;
> + struct amdtp_cl_data *cl_data;
> + u32 feature_report_size = 0;
> + u32 input_report_size = 0;
> +
> + cl_dev = devm_kzalloc(&pdev->dev, sizeof(*cl_dev), GFP_KERNEL);
> + if (!cl_dev)
> + return -ENOMEM;
Here you are using devm_ call. So better to be consistant and use
everywhere devm_
> +
> + cl_dev->pdev = pci_get_device(PCI_VENDOR_ID_AMD,
> + PCI_DEVICE_ID_AMD_MP2, NULL);
> + if (!cl_dev->pdev)
> + return -ENOMEM;
> +
> + cl_data = kzalloc(sizeof(*cl_data), GFP_KERNEL);
> + cl_data->num_hid_devices = amd_mp2_get_sensor_num
> + (cl_dev->pdev, &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);
> +
> + amdsfh_debugfs_setup(cl_data);
> +
> + for (i = 0; i < cl_data->num_hid_devices; i++) {
> + cl_data->sensor_virt_addr[i] = dma_alloc_coherent
> + (&pdev->dev, sizeof(int) * 8,
> + &cl_data->sensor_phy_addr[i], GFP_KERNEL);
> + cl_data->sensor_sts[i] = 0;
> + cl_data->sensor_requested_cnt[i] = 0;
> + cl_data->cur_hid_dev = i;
> +
> + cl_data->report_descr_size[i] = get_descriptor_size
> + (cl_data->sensor_idx[i], descr_size);
> +
> + feature_report_size = get_descriptor_size
> + (cl_data->sensor_idx[i], feature_size);
> +
> + input_report_size = get_descriptor_size
> + (cl_data->sensor_idx[i], input_size);
> +
> + cl_data->feature_report[i] =
> kzalloc(feature_report_size,
> + GFP_KERNEL);
> + cl_data->input_report[i] = kzalloc(input_report_size,
> + GFP_KERNEL);
> + info.period = PERIOD;
> + info.sensor_idx = cl_data->sensor_idx[i];
> + info.phy_address = cl_data->sensor_phy_addr[i];
> + cl_data->report_descr[i] = kzalloc
> + (cl_data->report_descr_size[i], GFP_KERNEL);
> + if (!cl_data->report_descr[i])
> + return -ENOMEM;
> + rc = get_report_descriptor(cl_data->sensor_idx[i],
> + cl_data->report_descr[i]);
> + rc = amdtp_hid_probe(cl_data->cur_hid_dev, cl_data);
> + rc = amd_start_sensor(cl_dev->pdev, info);
> + cl_data->sensor_sts[i] = 1;
> + }
> +
> + cl_dev->cl_data = cl_data;
> + cl_data_context = cl_data;
> + platform_set_drvdata(pdev, cl_dev);
> + schedule_delayed_work(&cl_data->work_buffer, PERIOD);
> + return 0;
> +}
> +
> +static int amd_sfh_hid_client_remove(struct platform_device *pdev)
> +{
> + int i;
> + struct amdtp_cl_device *cl_dev;
> + struct amdtp_cl_data *cl_data;
> +
> + cl_dev = platform_get_drvdata(pdev);
> + if (!(cl_dev))
> + return -EINVAL;
> +
> + cl_data = cl_dev->cl_data;
> + if (!(cl_data))
> + return -EINVAL;
> +
> + for (i = 0; i < cl_data->num_hid_devices; i++)
> + amd_stop_sensor(cl_dev->pdev, i);
one space
Thanks,
Srinivas
> + cancel_delayed_work_sync(&cl_data->work);
> + cancel_delayed_work_sync(&cl_data->work_buffer);
> + amdsfh_debugfs_destroy(cl_data);
> + amdtp_hid_remove(cl_data);
> +
> + for (i = 0; i < cl_data->num_hid_devices; i++) {
> + if (cl_data->sensor_virt_addr[i])
> + dma_free_coherent(&pdev->dev, 8 * sizeof(int),
> + cl_data->sensor_virt_addr[i],
> + cl_data->sensor_phy_addr[i]);
> + }
> +
> + kfree(cl_data);
> + pr_info("%s:%s Exit\n", DRIVER_NAME, __func__);
> + return 0;
> +}
> +
> +static const struct acpi_device_id amd_sfh_acpi_match[] = { {
> + "AMDI0080" },
> + { },
> +};
> +
> +MODULE_DEVICE_TABLE(acpi, amd_sfh_acpi_match);
> +static struct platform_driver amd_sfh_plat_driver = {
> + .probe = amd_sfh_hid_client_probe,
> + .remove = amd_sfh_hid_client_remove,
> + .driver = {
> + .name = "amd_sfh_platform",
> + .acpi_match_table =
> ACPI_PTR(amd_sfh_acpi_match),
> + },
> +};
> +module_platform_driver(amd_sfh_plat_driver);
> +MODULE_DESCRIPTION("AMD(R) SFH Client Driver");
> +MODULE_AUTHOR("Nehal Shah <nehal-bakulchandra.shah@....com>");
> +MODULE_LICENSE("Dual BSD/GPL");
> diff --git a/drivers/hid/amd-sfh-hid/amdsfh-hid.c b/drivers/hid/amd-
> sfh-hid/amdsfh-hid.c
> new file mode 100644
> index 0000000..89fe35a8
> --- /dev/null
> +++ b/drivers/hid/amd-sfh-hid/amdsfh-hid.c
> @@ -0,0 +1,179 @@
> +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
> +/*
> + * AMD MP2 Sensors transport driver
> + *
> + * Authors: Sandeep Singh <sandeep.singh@....com>
> + * Nehal Bakulchandra Shah <Nehal-bakulchandra.shah@....com
> >
> + */
> +#include <linux/hid.h>
> +#include <linux/wait.h>
> +#include <linux/sched.h>
> +#include "amdsfh-hid.h"
> +
> +#define DRIVER_NAME "AMD_MP2_SENSORS_TRANSPORT"
> +
> +/**
> + * amdtp_hid_parse() - hid-core .parse() callback
> + * @hid: hid device instance
> + *
> + * This function gets called during call to hid_add_device
> + *
> + * Return: 0 on success and non zero on error
> + */
> +static int amdtp_hid_parse(struct hid_device *hid)
> +{
> + struct amdtp_hid_data *hid_data = hid->driver_data;
> + struct amdtp_cl_data *cli_data = hid_data->cli_data;
> + int rc;
> +
> + rc = hid_parse_report(hid, cli_data->report_descr[hid_data-
> >index],
> + cli_data->report_descr_size[hid_data-
> >index]);
> + if (rc)
> + return rc;
> + return 0;
> +}
> +
> +/* Empty callbacks with success return code */
> +static int amdtp_hid_start(struct hid_device *hid)
> +{
> + return 0;
> +}
> +
> +static void amdtp_hid_stop(struct hid_device *hid)
> +{
> +}
> +
> +static int amdtp_hid_open(struct hid_device *hid)
> +{
> + return 0;
> +}
> +
> +static void amdtp_hid_close(struct hid_device *hid)
> +{
> +}
> +
> +static int amdtp_raw_request(struct hid_device *hdev, unsigned char
> reportnum,
> + u8 *buf, size_t len, unsigned char rtype,
> + int reqtype)
> +{
> + return 0;
> +}
> +
> +static void amdtp_hid_request(struct hid_device *hid, struct
> hid_report *rep,
> + int reqtype)
> +{
> + switch (reqtype) {
> + case HID_REQ_GET_REPORT:
> + amd_sfh_get_report(hid, rep->id, rep->type);
> + break;
> + case HID_REQ_SET_REPORT:
> + amd_sfh_set_report(hid, rep->id, reqtype);
> + break;
> + }
> +}
> +
> +static int amdtp_wait_for_response(struct hid_device *hid)
> +{
> + struct amdtp_hid_data *hid_data = hid->driver_data;
> + struct amdtp_cl_data *cli_data = hid_data->cli_data;
> + int i = 0;
> +
> + for (i = 0; i < cli_data->num_hid_devices; i++) {
> + if (cli_data->hid_sensor_hubs[i] == hid)
> + break;
> + }
> + if (!cli_data->request_done[i])
> + wait_event_interruptible_timeout(hid_data->hid_wait,
> + cli_data-
> >request_done[i],
> + 1500);
> + if (!cli_data->request_done[i]) {
> + hid_err(hid,
> + "timeout waiting for response from device\n");
> + return -ETIMEDOUT;
> + }
> + cli_data->request_done[i] = false;
> +
> + return 0;
> +}
> +
> +void amdtp_hid_wakeup(struct hid_device *hid)
> +{
> + struct amdtp_hid_data *hid_data = hid->driver_data;
> + struct amdtp_cl_data *cli_data = hid_data->cli_data;
> +
> + cli_data->request_done[cli_data->cur_hid_dev] = true;
> + wake_up_interruptible(&hid_data->hid_wait);
> +}
> +
> +static struct hid_ll_driver amdtp_hid_ll_driver = {
> + .parse = amdtp_hid_parse,
> + .start = amdtp_hid_start,
> + .stop = amdtp_hid_stop,
> + .open = amdtp_hid_open,
> + .close = amdtp_hid_close,
> + .request = amdtp_hid_request,
> + .wait = amdtp_wait_for_response,
> + .raw_request = amdtp_raw_request,
> +};
> +
> +int amdtp_hid_probe(unsigned int cur_hid_dev,
> + struct amdtp_cl_data *cli_data)
> +{
> + int rc;
> + struct hid_device *hid;
> + struct amdtp_hid_data *hid_data;
> +
> + hid = hid_allocate_device();
> + if (IS_ERR(hid)) {
> + rc = PTR_ERR(hid);
> + return -ENOMEM;
> + }
> +
> + hid_data = kzalloc(sizeof(*hid_data), GFP_KERNEL);
> + if (!hid_data) {
> + rc = -ENOMEM;
> + goto err_hid_data;
> + }
> +
> + hid->ll_driver = &amdtp_hid_ll_driver;
> + hid_data->index = cur_hid_dev;
> + hid_data->cli_data = cli_data;
> + init_waitqueue_head(&hid_data->hid_wait);
> +
> + hid->driver_data = hid_data;
> + cli_data->hid_sensor_hubs[cur_hid_dev] = hid;
> + hid->bus = BUS_AMD_AMDTP;
> + hid->version = AMD_SFH_HID_VERSION;
> + hid->vendor = AMD_SFH_HID_VENDOR;
> + hid->product = AMD_SFH_HID_PRODUCT;
> + snprintf(hid->name, sizeof(hid->name), "%s %04X:%04X", "hid-
> amdtp",
> + hid->vendor, hid->product);
> +
> + rc = hid_add_device(hid);
> + if (rc)
> + goto err_hid_device;
> +
> + return 0;
> +
> +err_hid_device:
> + kfree(hid_data);
> +err_hid_data:
> + hid_destroy_device(hid);
> + return rc;
> +}
> +
> +void amdtp_hid_remove(struct amdtp_cl_data *cli_data)
> +{
> + int i;
> +
> + for (i = 0; i < cli_data->num_hid_devices; ++i) {
> + kfree(cli_data->feature_report[i]);
> + kfree(cli_data->input_report[i]);
> + kfree(cli_data->report_descr[i]);
> + if (cli_data->hid_sensor_hubs[i]) {
> + kfree(cli_data->hid_sensor_hubs[i]-
> >driver_data);
> + hid_destroy_device(cli_data-
> >hid_sensor_hubs[i]);
> + cli_data->hid_sensor_hubs[i] = NULL;
> + }
> + }
> +}
> diff --git a/drivers/hid/amd-sfh-hid/amdsfh-hid.h b/drivers/hid/amd-
> sfh-hid/amdsfh-hid.h
> new file mode 100644
> index 0000000..8bbe40c
> --- /dev/null
> +++ b/drivers/hid/amd-sfh-hid/amdsfh-hid.h
> @@ -0,0 +1,85 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * AMD MP2 Sensors transport driver
> + *
> + * Authors: Sandeep Singh <sandeep.singh@....com>
> + * Nehal Bakulchandra Shah <Nehal-bakulchandra.shah@....com
> >
> + */
> +
> +#ifndef AMDSFH_HID_H
> +#define AMDSFH_HID_H
> +#include <linux/debugfs.h>
> +
> +#define MAX_HID_DEVICES 4
> +#define DCD_DATA_SIZE_CHAR 512
> +#define BUS_AMD_AMDTP 0x20
> +#define AMD_SFH_HID_VENDOR 1022
> +#define AMD_SFH_HID_PRODUCT 0x0001
> +#define AMD_SFH_HID_VERSION 0x0001
> +
> +struct amdtp_cl_device {
> + struct pci_dev *pdev;
> + struct amdtp_cl_data *cl_data;
> +};
> +
> +struct amdtp_cl_data {
> + u8 init_done;
> + unsigned int cur_hid_dev;
> + unsigned int hid_dev_count;
> + unsigned int num_hid_devices;
> + struct device_info *hid_devices;
> + unsigned char *report_descr[MAX_HID_DEVICES];
> + int report_descr_size[MAX_HID_DEVICES];
> + struct hid_device *hid_sensor_hubs[MAX_HID_DEVICES];
> + unsigned char *hid_descr[MAX_HID_DEVICES];
> + int hid_descr_size[MAX_HID_DEVICES];
> + phys_addr_t phy_addr_base;
> + u32 *sensor_virt_addr[MAX_HID_DEVICES];
> + phys_addr_t sensor_phy_addr[MAX_HID_DEVICES];
> + u32 sensor_sts[MAX_HID_DEVICES];
> + u32 sensor_requested_cnt[MAX_HID_DEVICES];
> + u8 report_type[MAX_HID_DEVICES];
> + u8 report_id[MAX_HID_DEVICES];
> + u8 sensor_idx[MAX_HID_DEVICES];
> + u8 *feature_report[MAX_HID_DEVICES];
> + u8 *input_report[MAX_HID_DEVICES];
> + u8 request_done[MAX_HID_DEVICES];
> + struct delayed_work work;
> + struct delayed_work work_buffer;
> + struct dentry *amd_debugfs_dir;
> +
> +};
> +
> +/**
> + * struct amdtp_hid_data - Per instance HID data
> + * @index: Device index in the order of enumeration
> + * @request_done: Get Feature/Input report complete flag
> + * used during get/set request from hid core
> + * @cli_data: Link to the client instance
> + * @hid_wait: Completion waitq
> + *
> + * Used to tie hid hid->driver data to driver client instance
> + */
> +struct amdtp_hid_data {
> + int index;
> + struct amdtp_cl_data *cli_data;
> + wait_queue_head_t hid_wait;
> +};
> +
> +/* Interface functions between HID LL driver and AMD SFH client */
> +void hid_amdtp_set_feature(struct hid_device *hid, char *buf,
> unsigned int len,
> + int report_id);
> +void hid_amdtp_get_report(struct hid_device *hid, int report_id,
> + int report_type);
> +int amdtp_hid_probe(unsigned int cur_hid_dev,
> + struct amdtp_cl_data *cli_data);
> +void amdtp_hid_remove(struct amdtp_cl_data *cli_data);
> +void amd_sfh_get_report(struct hid_device *hid, int report_id,
> + int report_type);
> +void amd_sfh_set_report(struct hid_device *hid, int report_id,
> + int report_type);
> +void amdtp_hid_wakeup(struct hid_device *hid);
> +
> +#define amd_sfh_cldata(__work) container_of(__work,\
> + struct amdtp_cl_data,
> work.work)
> +#endif /* AMDSFH_HID */
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