diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_client.c b/drivers/hid/amd-sfh-hid/amd_sfh_client.c new file mode 100644 index 000000000000..3d1ccac5d99a --- /dev/null +++ b/drivers/hid/amd-sfh-hid/amd_sfh_client.c @@ -0,0 +1,246 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * AMD SFH Client Layer + * Copyright 2020 Advanced Micro Devices, Inc. + * Authors: Nehal Bakulchandra Shah + * Sandeep Singh + */ + +#include +#include +#include +#include +#include +#include + +#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 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; + + 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(sensor_index, report_id, + cli_data->input_report[current_index], + cli_data->sensor_virt_addr[current_index]); + if (report_size) + 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); + 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); + u8 report_size; + int i; + + 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, msecs_to_jiffies(AMD_SFH_IDLE_LOOP)); +} + +int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata) +{ + 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; + u8 cl_idx; + int rc, i; + + dev = &privdata->pdev->dev; + cl_data = kzalloc(sizeof(*cl_data), GFP_KERNEL); + if (!cl_data) + return -ENOMEM; + + 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); + + for (i = 0; i < cl_data->num_hid_devices; i++) { + cl_data->sensor_virt_addr[i] = dma_alloc_coherent(dev, sizeof(int) * 8, + &cl_data->sensor_phys_addr[i], + GFP_KERNEL); + cl_data->sensor_sts[i] = 0; + 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] = kzalloc(feature_report_size, GFP_KERNEL); + if (!cl_data->feature_report[i]) { + rc = -ENOMEM; + goto cleanup; + } + cl_data->input_report[i] = kzalloc(input_report_size, GFP_KERNEL); + if (!cl_data->input_report[i]) { + rc = -ENOMEM; + goto cleanup; + } + info.period = msecs_to_jiffies(AMD_SFH_IDLE_LOOP); + info.sensor_idx = cl_idx; + info.phys_address = cl_data->sensor_phys_addr[i]; + + cl_data->report_descr[i] = kzalloc(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; + rc = amdtp_hid_probe(cl_data->cur_hid_dev, cl_data); + if (rc) + return rc; + amd_start_sensor(privdata, info); + cl_data->sensor_sts[i] = 1; + } + privdata->cl_data = cl_data; + 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 (cl_data->sensor_virt_addr[i]) { + dma_free_coherent(&privdata->pdev->dev, 8 * sizeof(int), + cl_data->sensor_virt_addr[i], + cl_data->sensor_phys_addr[i]); + } + kfree(cl_data->feature_report[i]); + kfree(cl_data->input_report[i]); + kfree(cl_data->report_descr[i]); + } + kfree(cl_data); + return rc; +} + +int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata) +{ + struct amdtp_cl_data *cl_data = privdata->cl_data; + int i; + + for (i = 0; i < cl_data->num_hid_devices; i++) + amd_stop_sensor(privdata, 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 (cl_data->sensor_virt_addr[i]) { + dma_free_coherent(&privdata->pdev->dev, 8 * sizeof(int), + cl_data->sensor_virt_addr[i], + cl_data->sensor_phys_addr[i]); + } + } + kfree(cl_data); + return 0; +} diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_hid.c b/drivers/hid/amd-sfh-hid/amd_sfh_hid.c new file mode 100644 index 000000000000..a471079a3bd0 --- /dev/null +++ b/drivers/hid/amd-sfh-hid/amd_sfh_hid.c @@ -0,0 +1,174 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * AMD MP2 Sensors transport driver + * + * Authors: Nehal Bakulchandra Shah + * Sandeep Singh + */ +#include +#include +#include + +#include "amd_sfh_hid.h" + +#define AMD_SFH_RESPONSE_TIMEOUT 1500 + +/** + * 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; + + return hid_parse_report(hid, cli_data->report_descr[hid_data->index], + cli_data->report_descr_sz[hid_data->index]); +} + +/* 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, u8 reportnum, + u8 *buf, size_t len, u8 rtype, int reqtype) +{ + return 0; +} + +static void amdtp_hid_request(struct hid_device *hid, struct hid_report *rep, int reqtype) +{ + int rc; + + switch (reqtype) { + case HID_REQ_GET_REPORT: + rc = amd_sfh_get_report(hid, rep->id, rep->type); + if (rc) + dev_err(&hid->dev, "AMDSFH get report error\n"); + break; + case HID_REQ_SET_REPORT: + amd_sfh_set_report(hid, rep->id, reqtype); + break; + default: + 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, ret = 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]) + ret = wait_event_interruptible_timeout(hid_data->hid_wait, + cli_data->request_done[i], + msecs_to_jiffies(AMD_SFH_RESPONSE_TIMEOUT)); + if (ret < 0) + return -ETIMEDOUT; + else if (ret == -ERESTARTSYS) + return -ERESTARTSYS; + else + 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(u32 cur_hid_dev, struct amdtp_cl_data *cli_data) +{ + struct hid_device *hid; + struct amdtp_hid_data *hid_data; + int rc; + + hid = hid_allocate_device(); + if (IS_ERR(hid)) + return PTR_ERR(hid); + + 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->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/amd_sfh_hid.h b/drivers/hid/amd-sfh-hid/amd_sfh_hid.h new file mode 100644 index 000000000000..6be0783d885c --- /dev/null +++ b/drivers/hid/amd-sfh-hid/amd_sfh_hid.h @@ -0,0 +1,67 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * AMD MP2 Sensors transport driver + * + * Authors: Nehal Bakulchandra Shah + * Sandeep Singh + */ + +#ifndef AMDSFH_HID_H +#define AMDSFH_HID_H + +#define MAX_HID_DEVICES 4 +#define BUS_AMD_AMDTP 0x20 +#define AMD_SFH_HID_VENDOR 0x1022 +#define AMD_SFH_HID_PRODUCT 0x0001 + +struct amdtp_cl_data { + u8 init_done; + u32 cur_hid_dev; + u32 hid_dev_count; + u32 num_hid_devices; + struct device_info *hid_devices; + u8 *report_descr[MAX_HID_DEVICES]; + int report_descr_sz[MAX_HID_DEVICES]; + struct hid_device *hid_sensor_hubs[MAX_HID_DEVICES]; + u8 *hid_descr[MAX_HID_DEVICES]; + int hid_descr_size[MAX_HID_DEVICES]; + phys_addr_t phys_addr_base; + u32 *sensor_virt_addr[MAX_HID_DEVICES]; + phys_addr_t sensor_phys_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 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->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, u32 len, int report_id); +void hid_amdtp_get_report(struct hid_device *hid, int report_id, int report_type); +int amdtp_hid_probe(u32 cur_hid_dev, struct amdtp_cl_data *cli_data); +void amdtp_hid_remove(struct amdtp_cl_data *cli_data); +int 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); +#endif