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Wed, 12 Feb 2020 02:57:06 +0000 From: Sandeep Singh To: jikos@kernel.org, benjamin.tissoires@redhat.com, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, srinivas.pandruvada@linux.intel.com, jic23@kernel.org, linux-iio@vger.kernel.org, Nehal-bakulchandra.Shah@amd.com Cc: Shyam-sundar.S-k@amd.com, Sandeep Singh Subject: [PATCH v3 3/5] SFH: Transport Driver to add support of AMD Sensor Fusion Hub (SFH) Date: Wed, 12 Feb 2020 08:26:35 +0530 Message-Id: <1581476197-25854-4-git-send-email-Sandeep.Singh@amd.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1581476197-25854-1-git-send-email-Sandeep.Singh@amd.com> References: <1581476197-25854-1-git-send-email-Sandeep.Singh@amd.com> Content-Type: text/plain X-ClientProxiedBy: MA1PR0101CA0016.INDPRD01.PROD.OUTLOOK.COM (2603:1096:a00:21::26) To MN2PR12MB3598.namprd12.prod.outlook.com (2603:10b6:208:d1::20) MIME-Version: 1.0 Received: from andbang2.amd.com (165.204.156.251) by MA1PR0101CA0016.INDPRD01.PROD.OUTLOOK.COM (2603:1096:a00:21::26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.20.2707.21 via Frontend Transport; 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X-Microsoft-Antispam-Message-Info: GIZBxHM73mkRDmajRWkRjf6l/SiA21JTXzZJvyWp9wcgd4x8dUoIO1K6CVZiZb58KnvzAXHViTFaiVBOG9YdwVziMBUVYoMHqpk+NU/WVUTsDSNt4JDF1sIKE7lo/KPTwnNiPKU3yRXoGBa552SQmZBu7RaGwyrVAzXttpT/IRWC+bJyilNEcm1la3jSj6e3zAFb/Z7kSNKegeoWTtCPd/pSHvvaBllYLZZI23yp/tpH1bIcET7Vymc1jp5rg+AOH1FXX5S9JAFvfNPLCBp7iwO23YWBndvFtwrPTFYj6LrMGdUR7lgdczEH+NiX7dxEsZiJZgj5vXEovuatuKd4rZK6c7gds4Jw3Y0nTzZlnHr0PTbR6TFd7UT34iN9wLAW5rOLvr2Z4Y/+otC8+SWAEXbv+1auW1yl4rtocbAK7JEwNkL2czWG8N1B8GQl0Utr X-MS-Exchange-AntiSpam-MessageData: mhbeJiCnYGw0d6eCiR8XplnShJ+Cas831mVOcrL+lMyLoMvGoNUDPKw0GSgdnjehSM21YLued8R2VuhfHTZb8ggzLtGYBA/t+AMMmhbk22eIUV0T+moArpvayxEMHWlm4SGU9lwamqeaw/gxvKcOcg== X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 4f1e3202-60c6-4375-662f-08d7af673e60 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Feb 2020 02:57:06.1120 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: lVg6krcPK3mxtYVjH+yctA/NcIcEwqjUzb/V1iu8VuMUjlqi5BNjoktBh228QGoe X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR12MB3343 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sandeep Singh This part of module will provide the interaction between HID framework and client driver.This modules will registered client driver with HID framework. Signed-off-by: Sandeep Singh Signed-off-by: Nehal Shah Reported-by: kbuild test robot Reported-by: Dan Carpenter --- drivers/hid/amd-sfh-hid/amdsfh-hid-client.c | 260 ++++++++++++++++++++++++++++ drivers/hid/amd-sfh-hid/amdsfh-hid.c | 179 +++++++++++++++++++ drivers/hid/amd-sfh-hid/amdsfh-hid.h | 85 +++++++++ 3 files changed, 524 insertions(+) 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-hid-client.c b/drivers/hid/amd-sfh-hid/amdsfh-hid-client.c new file mode 100644 index 0000000..a78e7fb --- /dev/null +++ b/drivers/hid/amd-sfh-hid/amdsfh-hid-client.c @@ -0,0 +1,260 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause +/* + * AMD SFH Client Driver + * Author: Nehal Bakulchandra Shah + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "amdsfh-hid.h" +#include "amd_mp2_pcie.h" +#include "amdsfh-debugfs.h" +#include "hid_descriptor/amd_sfh_hid_descriptor.h" + +#define DRIVER_DESC "AMD(R) PCIe MP2 Communication Client Driver" +#define DRIVER_NAME "AMD_SFH_HID_CLIENT" +#define PERIOD 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; +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; + 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); + 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 "); +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 + * Nehal Bakulchandra Shah + */ +#include +#include +#include +#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 + * Nehal Bakulchandra Shah + */ + +#ifndef AMDSFH_HID_H +#define AMDSFH_HID_H +#include + +#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 */ -- 2.7.4