// SPDX-License-Identifier: GPL-2.0-only /* * PCI glue for ISHTP provider device (ISH) driver * * Copyright (c) 2014-2016, Intel Corporation. */ #include <linux/acpi.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/kernel.h> #include <linux/device.h> #include <linux/fs.h> #include <linux/errno.h> #include <linux/types.h> #include <linux/pci.h> #include <linux/sched.h> #include <linux/suspend.h> #include <linux/interrupt.h> #include <linux/workqueue.h> #define CREATE_TRACE_POINTS #include <trace/events/intel_ish.h> #include "ishtp-dev.h" #include "hw-ish.h" enum ishtp_driver_data_index { … }; #define ISH_FW_FILENAME_LNL_M … static struct ishtp_driver_data ishtp_driver_data[] = …; static const struct pci_device_id ish_pci_tbl[] = …; MODULE_DEVICE_TABLE(pci, ish_pci_tbl); /** * ish_event_tracer() - Callback function to dump trace messages * @dev: ishtp device * @format: printf style format * * Callback to direct log messages to Linux trace buffers */ static __printf(2, 3) void ish_event_tracer(struct ishtp_device *dev, const char *format, ...) { … } /** * ish_init() - Init function * @dev: ishtp device * * This function initialize wait queues for suspend/resume and call * calls hadware initialization function. This will initiate * startup sequence * * Return: 0 for success or error code for failure */ static int ish_init(struct ishtp_device *dev) { … } static const struct pci_device_id ish_invalid_pci_ids[] = …; static inline bool ish_should_enter_d0i3(struct pci_dev *pdev) { … } static inline bool ish_should_leave_d0i3(struct pci_dev *pdev) { … } /** * ish_probe() - PCI driver probe callback * @pdev: pci device * @ent: pci device id * * Initialize PCI function, setup interrupt and call for ISH initialization * * Return: 0 for success or error code for failure */ static int ish_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { … } /** * ish_remove() - PCI driver remove callback * @pdev: pci device * * This function does cleanup of ISH on pci remove callback */ static void ish_remove(struct pci_dev *pdev) { … } /** * ish_shutdown() - PCI driver shutdown callback * @pdev: pci device * * This function sets up wakeup for S5 */ static void ish_shutdown(struct pci_dev *pdev) { … } static struct device __maybe_unused *ish_resume_device; /* 50ms to get resume response */ #define WAIT_FOR_RESUME_ACK_MS … /** * ish_resume_handler() - Work function to complete resume * @work: work struct * * The resume work function to complete resume function asynchronously. * There are two resume paths, one where ISH is not powered off, * in that case a simple resume message is enough, others we need * a reset sequence. */ static void __maybe_unused ish_resume_handler(struct work_struct *work) { … } /** * ish_suspend() - ISH suspend callback * @device: device pointer * * ISH suspend callback * * Return: 0 to the pm core */ static int __maybe_unused ish_suspend(struct device *device) { … } static __maybe_unused DECLARE_WORK(resume_work, ish_resume_handler); /** * ish_resume() - ISH resume callback * @device: device pointer * * ISH resume callback * * Return: 0 to the pm core */ static int __maybe_unused ish_resume(struct device *device) { … } static SIMPLE_DEV_PM_OPS(ish_pm_ops, ish_suspend, ish_resume); static struct pci_driver ish_driver = …; module_pci_driver(…) …; /* Original author */ MODULE_AUTHOR(…) …; /* Adoption to upstream Linux kernel */ MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_FIRMWARE(…);
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