1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (c) 2014-2016, Intel Corporation.
23 #include "ishtp-dev.h"
24 #include "hw-ish.h"
49  * ish_event_tracer() - Callback function to dump trace messages
71  * ish_init() - Init function
87 		dev_err(dev->devc, "ISH: hw start failed.\n");  in ish_init()
91 	/* Start the inter process communication to ISH processor */  in ish_init()
94 		dev_err(dev->devc, "ISHTP: Protocol init failed.\n");  in ish_init()
110 	return !pm_suspend_via_firmware() || pdev->device == CHV_DEVICE_ID;  in ish_should_enter_d0i3()
115 	return !pm_resume_via_firmware() || pdev->device == CHV_DEVICE_ID;  in ish_should_leave_d0i3()
128 		return -ENODEV;  in enable_gpe()
130 	wakeup = &adev->wakeup;  in enable_gpe()
132 	acpi_sts = acpi_enable_gpe(wakeup->gpe_device, wakeup->gpe_number);  in enable_gpe()
135 		return -EIO;  in enable_gpe()
140 	return -ENODEV;  in enable_gpe()
148 	     pci_pme_capable(pdev, PCI_D3cold)) && !enable_gpe(&pdev->dev)) {  in enable_pme_wake()
150 		dev_dbg(&pdev->dev, "ish ipc driver pme wake enabled\n");  in enable_pme_wake()
155  * ish_probe() - PCI driver probe callback
169 	struct device *dev = &pdev->dev;  in ish_probe()
173 		return -ENODEV;  in ish_probe()
195 		ret = -ENOMEM;  in ish_probe()
199 	ishtp->print_log = ish_event_tracer;  in ish_probe()
202 	hw->mem_addr = pcim_iomap_table(pdev)[0];  in ish_probe()
203 	ishtp->pdev = pdev;  in ish_probe()
207 	if (!pdev->msi_enabled && !pdev->msix_enabled)  in ish_probe()
210 	ret = devm_request_irq(dev, pdev->irq, ish_irq_handler,  in ish_probe()
213 		dev_err(dev, "ISH: request IRQ %d failed\n", pdev->irq);  in ish_probe()
217 	dev_set_drvdata(ishtp->devc, ishtp);  in ish_probe()
219 	init_waitqueue_head(&ishtp->suspend_wait);  in ish_probe()
220 	init_waitqueue_head(&ishtp->resume_wait);  in ish_probe()
223 	if (pdev->device == EHL_Ax_DEVICE_ID)  in ish_probe()
234  * ish_remove() - PCI driver remove callback
253  * ish_resume_handler() - Work function to complete resume
265 	uint32_t fwsts = dev->ops->get_fw_status(dev);  in ish_resume_handler()
267 	if (ish_should_leave_d0i3(pdev) && !dev->suspend_flag  in ish_resume_handler()
269 		disable_irq_wake(pdev->irq);  in ish_resume_handler()
276 		if (dev->resume_flag)  in ish_resume_handler()
277 			wait_event_interruptible_timeout(dev->resume_wait,  in ish_resume_handler()
278 				!dev->resume_flag,  in ish_resume_handler()
285 		if (dev->resume_flag)  in ish_resume_handler()
289 		 * Resume from the D3, full reboot of ISH processor will happen,  in ish_resume_handler()
297  * ish_suspend() - ISH suspend callback
314 		if (dev->suspend_flag)  in ish_suspend()
317 		dev->resume_flag = 0;  in ish_suspend()
318 		dev->suspend_flag = 1;  in ish_suspend()
322 		if (dev->suspend_flag)  in ish_suspend()
323 			wait_event_interruptible_timeout(dev->suspend_wait,  in ish_suspend()
324 					!dev->suspend_flag,  in ish_suspend()
327 		if (dev->suspend_flag) {  in ish_suspend()
340 			enable_irq_wake(pdev->irq);  in ish_suspend()
355  * ish_resume() - ISH resume callback
368 	if (dev->pdev->device == EHL_Ax_DEVICE_ID) {  in ish_resume()
371 		dev_dbg(dev->devc, "set power state to D0 for ehl\n");  in ish_resume()
375 	dev->resume_flag = 1;  in ish_resume()