| Message ID | 1580272046-32101-4-git-send-email-Sandeep.Singh@amd.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | SFH: Add Support for AMD Sensor Fusion Hub | expand |
On Wed, 2020-01-29 at 09:57 +0530, Sandeep Singh wrote: > From: Sandeep Singh <sandeep.singh@amd.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@amd.com> > Signed-off-by: Nehal Shah <Nehal-bakulchandra.Shah@amd.com> > Reported-by: kbuild test robot <lkp@intel.com> > Reported-by: Dan Carpenter <dan.carpenter@oracle.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@amd.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@amd.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@amd.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@amd.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@amd.com> > + * Nehal Bakulchandra Shah <Nehal-bakulchandra.shah@amd.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@amd.com> > + * Nehal Bakulchandra Shah <Nehal-bakulchandra.shah@amd.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 */
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@amd.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@amd.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@amd.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; + + 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); + 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@amd.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@amd.com> + * Nehal Bakulchandra Shah <Nehal-bakulchandra.shah@amd.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@amd.com> + * Nehal Bakulchandra Shah <Nehal-bakulchandra.shah@amd.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 */