1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (c) 2014-2016, Intel Corporation.
22 #include "ishtp-dev.h"
23 #include "hw-ish.h"
45  * ish_event_tracer() - Callback function to dump trace messages
67  * ish_init() - Init function
83 		dev_err(dev->devc, "ISH: hw start failed.\n");  in ish_init()
87 	/* Start the inter process communication to ISH processor */  in ish_init()
90 		dev_err(dev->devc, "ISHTP: Protocol init failed.\n");  in ish_init()
106 	return !pm_suspend_via_firmware() || pdev->device == CHV_DEVICE_ID;  in ish_should_enter_d0i3()
111 	return !pm_resume_via_firmware() || pdev->device == CHV_DEVICE_ID;  in ish_should_leave_d0i3()
115  * ish_probe() - PCI driver probe callback
129 	struct device *dev = &pdev->dev;  in ish_probe()
133 		return -ENODEV;  in ish_probe()
155 		ret = -ENOMEM;  in ish_probe()
159 	ishtp->print_log = ish_event_tracer;  in ish_probe()
162 	hw->mem_addr = pcim_iomap_table(pdev)[0];  in ish_probe()
163 	ishtp->pdev = pdev;  in ish_probe()
167 	if (!pdev->msi_enabled && !pdev->msix_enabled)  in ish_probe()
170 	ret = devm_request_irq(dev, pdev->irq, ish_irq_handler,  in ish_probe()
173 		dev_err(dev, "ISH: request IRQ %d failed\n", pdev->irq);  in ish_probe()
177 	dev_set_drvdata(ishtp->devc, ishtp);  in ish_probe()
179 	init_waitqueue_head(&ishtp->suspend_wait);  in ish_probe()
180 	init_waitqueue_head(&ishtp->resume_wait);  in ish_probe()
190  * ish_remove() - PCI driver remove callback
209  * ish_resume_handler() - Work function to complete resume
223 	if (ish_should_leave_d0i3(pdev) && !dev->suspend_flag) {  in ish_resume_handler()
224 		disable_irq_wake(pdev->irq);  in ish_resume_handler()
229 		if (dev->resume_flag)  in ish_resume_handler()
230 			ret = wait_event_interruptible_timeout(dev->resume_wait,  in ish_resume_handler()
231 				!dev->resume_flag,  in ish_resume_handler()
238 		if (dev->resume_flag)  in ish_resume_handler()
242 		 * Resume from the D3, full reboot of ISH processor will happen,  in ish_resume_handler()
250  * ish_suspend() - ISH suspend callback
267 		if (dev->suspend_flag)  in ish_suspend()
270 		dev->resume_flag = 0;  in ish_suspend()
271 		dev->suspend_flag = 1;  in ish_suspend()
275 		if (dev->suspend_flag)  in ish_suspend()
276 			wait_event_interruptible_timeout(dev->suspend_wait,  in ish_suspend()
277 					!dev->suspend_flag,  in ish_suspend()
280 		if (dev->suspend_flag) {  in ish_suspend()
293 			enable_irq_wake(pdev->irq);  in ish_suspend()
308  * ish_resume() - ISH resume callback
321 	dev->resume_flag = 1;  in ish_resume()