diff options
| -rw-r--r-- | Documentation/hid/amd-sfh-hid.rst | 145 | ||||
| -rw-r--r-- | Documentation/hid/index.rst | 1 | ||||
| -rw-r--r-- | MAINTAINERS | 8 | ||||
| -rw-r--r-- | drivers/hid/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/hid/Makefile | 2 | ||||
| -rw-r--r-- | drivers/hid/amd-sfh-hid/Kconfig | 18 | ||||
| -rw-r--r-- | drivers/hid/amd-sfh-hid/Makefile | 13 | ||||
| -rw-r--r-- | drivers/hid/amd-sfh-hid/amd_sfh_client.c | 246 | ||||
| -rw-r--r-- | drivers/hid/amd-sfh-hid/amd_sfh_hid.c | 174 | ||||
| -rw-r--r-- | drivers/hid/amd-sfh-hid/amd_sfh_hid.h | 67 | ||||
| -rw-r--r-- | drivers/hid/amd-sfh-hid/amd_sfh_pcie.c | 152 | ||||
| -rw-r--r-- | drivers/hid/amd-sfh-hid/amd_sfh_pcie.h | 79 | ||||
| -rw-r--r-- | drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.c | 224 | ||||
| -rw-r--r-- | drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.h | 107 | ||||
| -rw-r--r-- | drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_report_desc.h | 645 |
15 files changed, 1883 insertions, 0 deletions
diff --git a/Documentation/hid/amd-sfh-hid.rst b/Documentation/hid/amd-sfh-hid.rst new file mode 100644 index 000000000000..1f2fe29ccd4f --- /dev/null +++ b/Documentation/hid/amd-sfh-hid.rst @@ -0,0 +1,145 @@ +.. SPDX-License-Identifier: GPL-2.0 + + +AMD Sensor Fusion Hub +===================== +AMD Sensor Fusion Hub (SFH) is part of an SOC starting from Ryzen based platforms. +The solution is working well on several OEM products. AMD SFH uses HID over PCIe bus. +In terms of architecture it resembles ISH, however the major difference is all +the HID reports are generated as part of the kernel driver. + +1. Block Diagram +================ + +:: + + --------------------------------- + | HID User Space Applications | + - ------------------------------- + + --------------------------------------------- + --------------------------------- + | HID Core | + --------------------------------- + + --------------------------------- + | AMD HID Transport | + --------------------------------- + + -------------------------------- + | AMD HID Client | + | with HID Report Generator| + -------------------------------- + + -------------------------------- + | AMD MP2 PCIe Driver | + -------------------------------- + OS + --------------------------------------------- + Hardware + Firmware + -------------------------------- + | SFH MP2 Processor | + -------------------------------- + + +AMD HID Transport Layer +----------------------- +AMD SFH transport is also implemented as a bus. Each client application executing in the AMD MP2 is +registered as a device on this bus. Here: MP2 which is an ARM core connected to x86 for processing +sensor data. The layer, which binds each device (AMD SFH HID driver) identifies the device type and +registers with the hid core. Transport layer attach a constant "struct hid_ll_driver" object with +each device. Once a device is registered with HID core, the callbacks provided via this struct are +used by HID core to communicate with the device. AMD HID Transport layer implements the synchronous calls. + +AMD HID Client Layer +-------------------- +This layer is responsible to implement HID request and descriptors. As firmware is OS agnostic, HID +client layer fills the HID request structure and descriptors. HID client layer is complex as it is +interface between MP2 PCIe layer and HID. HID client layer initialized the MP2 PCIe layer and holds +the instance of MP2 layer. It identifies the number of sensors connected using MP2-PCIe layer. Base +on that allocates the DRAM address for each and every sensor and pass it to MP2-PCIe driver.On +enumeration of each the sensor, client layer fills the HID Descriptor structure and HID input repor +structure. HID Feature report structure is optional. The report descriptor structure varies from +sensor to sensor. + +AMD MP2 PCIe layer +------------------ +MP2 PCIe Layer is responsible for making all transactions with the firmware over PCIe. +The connection establishment between firmware and PCIe happens here. + +The communication between X86 and MP2 is split into three parts. +1. Command transfer via the C2P mailbox registers. +2. Data transfer via DRAM. +3. Supported sensor info via P2C registers. + +Commands are sent to MP2 using C2P Mailbox registers. Writing into C2P Message registers generate +interrupt to MP2. The client layer allocates the physical memory and the same is sent to MP2 via +the PCI layer. MP2 firmware writes the command output to the access DRAM memory which the client +layer has allocated. Firmware always writes minimum of 32 bytes into DRAM. So as a protocol driver +shall allocate minimum of 32 bytes DRAM space. + +Enumeration and Probing flow +---------------------------- +:: + + HID AMD AMD AMD -PCIe MP2 + Core Transport Client layer layer FW + | | | | | + | | | on Boot Driver Loaded | + | | | | | + | | | MP2-PCIe Int | + | | | | | + | | |---Get Number of sensors-> | | + | | | Read P2C | + | | | Register | + | | | | | + | | | Loop(for No of Sensors) | | + | | |----------------------| | | + | | | Create HID Descriptor| | | + | | | Create Input report | | | + | | | Descriptor Map | | | + | | | the MP2 FW Index to | | | + | | | HID Index | | | + | | | Allocate the DRAM | Enable | + | | | address | Sensors | + | | |----------------------| | | + | | HID transport| | Enable | + | |<--Probe------| |---Sensor CMD--> | + | | Create the | | | + | | HID device | | | + | | (MFD) | | | + | | by Populating| | | + | | the HID | | | + | | ll_driver | | | + | HID | | | | + | add | | | | + |Device | | | | + |<------------- | | | | + + +Data Flow from Application to the AMD SFH Driver +------------------------------------------------ + +:: + + | | | | | + | | | | | + | | | | | + | | | | | + | | | | | + |HID_req | | | | + |get_report | | | | + |------------->| | | | + | | HID_get_input| | | + | | report | | | + | |------------->|------------------------| | | + | | | Read the DRAM data for| | | + | | | requested sensor and | | | + | | | create the HID input | | | + | | | report | | | + | | |------------------------| | | + | |Data received | | | + | | in HID report| | | + To |<-------------|<-------------| | | + Applications| | | | | + <-------| | | | | diff --git a/Documentation/hid/index.rst b/Documentation/hid/index.rst index 737d66dc16a1..e50f513c579c 100644 --- a/Documentation/hid/index.rst +++ b/Documentation/hid/index.rst @@ -16,3 +16,4 @@ Human Interface Devices (HID) hid-alps intel-ish-hid + amd-sfh-hid diff --git a/MAINTAINERS b/MAINTAINERS index dd1887c3c5bf..9d12f61d0519 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -950,6 +950,14 @@ S: Supported F: arch/arm64/boot/dts/amd/amd-seattle-xgbe*.dtsi F: drivers/net/ethernet/amd/xgbe/ +AMD SENSOR FUSION HUB DRIVER +M: Nehal Shah <nehal-bakulchandra.shah@amd.com> +M: Sandeep Singh <sandeep.singh@amd.com> +L: linux-input@vger.kernel.org +S: Maintained +F: Documentation/hid/amd-sfh* +F: drivers/hid/amd-sfh-hid/ + AMS AS73211 DRIVER M: Christian Eggers <ceggers@arri.de> L: linux-iio@vger.kernel.org diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig index 612629678c84..fff3963ba02b 100644 --- a/drivers/hid/Kconfig +++ b/drivers/hid/Kconfig @@ -1183,4 +1183,6 @@ source "drivers/hid/i2c-hid/Kconfig" source "drivers/hid/intel-ish-hid/Kconfig" +source "drivers/hid/amd-sfh-hid/Kconfig" + endmenu diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile index 4acb583c92a6..014d21fe7dac 100644 --- a/drivers/hid/Makefile +++ b/drivers/hid/Makefile @@ -142,3 +142,5 @@ obj-$(CONFIG_I2C_HID) += i2c-hid/ obj-$(CONFIG_INTEL_ISH_HID) += intel-ish-hid/ obj-$(INTEL_ISH_FIRMWARE_DOWNLOADER) += intel-ish-hid/ + +obj-$(CONFIG_AMD_SFH_HID) += amd-sfh-hid/ diff --git a/drivers/hid/amd-sfh-hid/Kconfig b/drivers/hid/amd-sfh-hid/Kconfig new file mode 100644 index 000000000000..db069a83e9a2 --- /dev/null +++ b/drivers/hid/amd-sfh-hid/Kconfig @@ -0,0 +1,18 @@ +# SPDX-License-Identifier: GPL-2.0-or-later +menu "AMD SFH HID Support" + depends on X86_64 || COMPILE_TEST + depends on PCI + depends on HID + +config AMD_SFH_HID + tristate "AMD Sensor Fusion Hub" + help + If you say yes to this option, support will be included for the + AMD Sensor Fusion Hub. + This driver will enable sensors functionality on AMD platforms + starting from 17h family of RYZEN parts. + + This driver can also be built as a module. If so, the module will + be called amd-sfh. + Say Y or M here if you want to support AMD SFH. If unsure, say N. +endmenu diff --git a/drivers/hid/amd-sfh-hid/Makefile b/drivers/hid/amd-sfh-hid/Makefile new file mode 100644 index 000000000000..35e704da5612 --- /dev/null +++ b/drivers/hid/amd-sfh-hid/Makefile @@ -0,0 +1,13 @@ +# SPDX-License-Identifier: GPL-2.0-or-later +# +# Makefile - AMD SFH HID drivers +# Copyright (c) 2019-2020, Advanced Micro Devices, Inc. +# +# +obj-$(CONFIG_AMD_SFH_HID) += amd_sfh.o +amd_sfh-objs := amd_sfh_hid.o +amd_sfh-objs += amd_sfh_client.o +amd_sfh-objs += amd_sfh_pcie.o +amd_sfh-objs += hid_descriptor/amd_sfh_hid_desc.o + +ccflags-y += -I $(srctree)/$(src)/ 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 <Nehal-Bakulchandra.Shah@amd.com> + * Sandeep Singh <Sandeep.singh@amd.com> + */ + +#include <linux/dma-mapping.h> +#include <linux/hid.h> +#include <linux/list.h> +#include <linux/slab.h> +#include <linux/workqueue.h> +#include <linux/errno.h> + +#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..4f989483aa03 --- /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 <Nehal-bakulchandra.shah@amd.com> + * Sandeep Singh <sandeep.singh@amd.com> + */ +#include <linux/hid.h> +#include <linux/wait.h> +#include <linux/sched.h> + +#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 == -ERESTARTSYS) + return -ERESTARTSYS; + else if (ret < 0) + return -ETIMEDOUT; + 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 <Nehal-bakulchandra.shah@amd.com> + * Sandeep Singh <sandeep.singh@amd.com> + */ + +#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 diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c new file mode 100644 index 000000000000..a51c7b76283b --- /dev/null +++ b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c @@ -0,0 +1,152 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * AMD MP2 PCIe communication driver + * Copyright 2020 Advanced Micro Devices, Inc. + * + * Authors: Shyam Sundar S K <Shyam-sundar.S-k@amd.com> + * Sandeep Singh <Sandeep.singh@amd.com> + */ + +#include <linux/bitops.h> +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/interrupt.h> +#include <linux/io-64-nonatomic-lo-hi.h> +#include <linux/module.h> +#include <linux/slab.h> + +#include "amd_sfh_pcie.h" + +#define DRIVER_NAME "pcie_mp2_amd" +#define DRIVER_DESC "AMD(R) PCIe MP2 Communication Driver" + +#define ACEL_EN BIT(0) +#define GYRO_EN BIT(1) +#define MAGNO_EN BIT(2) +#define ALS_EN BIT(19) + +void amd_start_sensor(struct amd_mp2_dev *privdata, struct amd_mp2_sensor_info info) +{ + union sfh_cmd_param cmd_param; + union sfh_cmd_base cmd_base; + + /* fill up command register */ + memset(&cmd_base, 0, sizeof(cmd_base)); + cmd_base.s.cmd_id = ENABLE_SENSOR; + cmd_base.s.period = info.period; + cmd_base.s.sensor_id = info.sensor_idx; + + /* fill up command param register */ + memset(&cmd_param, 0, sizeof(cmd_param)); + cmd_param.s.buf_layout = 1; + cmd_param.s.buf_length = 16; + + writeq(info.phys_address, privdata->mmio + AMD_C2P_MSG2); + writel(cmd_param.ul, privdata->mmio + AMD_C2P_MSG1); + writel(cmd_base.ul, privdata->mmio + AMD_C2P_MSG0); +} + +void amd_stop_sensor(struct amd_mp2_dev *privdata, u16 sensor_idx) +{ + union sfh_cmd_base cmd_base; + + /* fill up command register */ + memset(&cmd_base, 0, sizeof(cmd_base)); + cmd_base.s.cmd_id = DISABLE_SENSOR; + cmd_base.s.period = 0; + cmd_base.s.sensor_id = sensor_idx; + + writeq(0x0, privdata->mmio + AMD_C2P_MSG2); + writel(cmd_base.ul, privdata->mmio + AMD_C2P_MSG0); +} + +void amd_stop_all_sensors(struct amd_mp2_dev *privdata) +{ + union sfh_cmd_base cmd_base; + + /* fill up command register */ + memset(&cmd_base, 0, sizeof(cmd_base)); + cmd_base.s.cmd_id = STOP_ALL_SENSORS; + cmd_base.s.period = 0; + cmd_base.s.sensor_id = 0; + + writel(cmd_base.ul, privdata->mmio + AMD_C2P_MSG0); +} + +int amd_mp2_get_sensor_num(struct amd_mp2_dev *privdata, u8 *sensor_id) +{ + int activestatus, num_of_sensors = 0; + + privdata->activecontrolstatus = readl(privdata->mmio + AMD_P2C_MSG3); + activestatus = privdata->activecontrolstatus >> 4; + if (ACEL_EN & activestatus) + sensor_id[num_of_sensors++] = accel_idx; + + if (GYRO_EN & activestatus) + sensor_id[num_of_sensors++] = gyro_idx; + + if (MAGNO_EN & activestatus) + sensor_id[num_of_sensors++] = mag_idx; + + if (ALS_EN & activestatus) + sensor_id[num_of_sensors++] = als_idx; + + return num_of_sensors; +} + +static void amd_mp2_pci_remove(void *privdata) +{ + amd_sfh_hid_client_deinit(privdata); + amd_stop_all_sensors(privdata); +} + +static int amd_mp2_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct amd_mp2_dev *privdata; + int rc; + + privdata = devm_kzalloc(&pdev->dev, sizeof(*privdata), GFP_KERNEL); + if (!privdata) + return -ENOMEM; + + privdata->pdev = pdev; + pci_set_drvdata(pdev, privdata); + rc = pcim_enable_device(pdev); + if (rc) + return rc; + + rc = pcim_iomap_regions(pdev, BIT(2), DRIVER_NAME); + if (rc) + return rc; + + privdata->mmio = pcim_iomap_table(pdev)[2]; + pci_set_master(pdev); + rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); + if (rc) { + rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); + return rc; + } + rc = devm_add_action_or_reset(&pdev->dev, amd_mp2_pci_remove, privdata); + if (rc) + return rc; + + return amd_sfh_hid_client_init(privdata); +} + +static const struct pci_device_id amd_mp2_pci_tbl[] = { + { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_MP2) }, + { } +}; +MODULE_DEVICE_TABLE(pci, amd_mp2_pci_tbl); + +static struct pci_driver amd_mp2_pci_driver = { + .name = DRIVER_NAME, + .id_table = amd_mp2_pci_tbl, + .probe = amd_mp2_pci_probe, +}; +module_pci_driver(amd_mp2_pci_driver); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_AUTHOR("Shyam Sundar S K <Shyam-sundar.S-k@amd.com>"); +MODULE_AUTHOR("Sandeep Singh <Sandeep.singh@amd.com>"); diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h new file mode 100644 index 000000000000..e8be94f935b7 --- /dev/null +++ b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h @@ -0,0 +1,79 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * AMD MP2 PCIe communication driver + * Copyright 2020 Advanced Micro Devices, Inc. + * Authors: Shyam Sundar S K <Shyam-sundar.S-k@amd.com> + * Sandeep Singh <Sandeep.singh@amd.com> + */ + +#ifndef PCIE_MP2_AMD_H +#define PCIE_MP2_AMD_H + +#include <linux/pci.h> + +#define PCI_DEVICE_ID_AMD_MP2 0x15E4 + +#define ENABLE_SENSOR 1 +#define DISABLE_SENSOR 2 +#define STOP_ALL_SENSORS 8 + +/* MP2 C2P Message Registers */ +#define AMD_C2P_MSG0 0x10500 +#define AMD_C2P_MSG1 0x10504 +#define AMD_C2P_MSG2 0x10508 + +/* MP2 P2C Message Registers */ +#define AMD_P2C_MSG3 0x1068C /* Supported Sensors info */ + +/* SFH Command regis |