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linux/drivers/usb/dwc3/dwc3-pci.c
Rafael J. Wysocki de3ef1eb1c PM / core: Drop run_wake flag from struct dev_pm_info 
The run_wake flag in struct dev_pm_info is used to indicate whether
or not the device is capable of generating remote wakeup signals at
run time (or in the system working state), but the distinction
between runtime remote wakeup and system wakeup signaling has always
been rather artificial.  The only practical reason for it to exist
at the core level was that ACPI and PCI treated those two cases
differently, but that's not the case any more after recent changes.

For this reason, get rid of the run_wake flag and, when applicable,
use device_set_wakeup_capable() and device_can_wakeup() instead of
device_set_run_wake() and device_run_wake(), respectively.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
2017-06-28 01:52:52 +02:00

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/**
* dwc3-pci.c - PCI Specific glue layer
*
* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
*
* Authors: Felipe Balbi <balbi@ti.com>,
* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 of
* the License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/pm_runtime.h>
#include <linux/platform_device.h>
#include <linux/gpio/consumer.h>
#include <linux/acpi.h>
#include <linux/delay.h>
#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI 0xabce
#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31 0xabcf
#define PCI_DEVICE_ID_INTEL_BYT 0x0f37
#define PCI_DEVICE_ID_INTEL_MRFLD 0x119e
#define PCI_DEVICE_ID_INTEL_BSW 0x22b7
#define PCI_DEVICE_ID_INTEL_SPTLP 0x9d30
#define PCI_DEVICE_ID_INTEL_SPTH 0xa130
#define PCI_DEVICE_ID_INTEL_BXT 0x0aaa
#define PCI_DEVICE_ID_INTEL_BXT_M 0x1aaa
#define PCI_DEVICE_ID_INTEL_APL 0x5aaa
#define PCI_DEVICE_ID_INTEL_KBP 0xa2b0
#define PCI_DEVICE_ID_INTEL_GLK 0x31aa
#define PCI_DEVICE_ID_INTEL_CNPLP 0x9dee
#define PCI_DEVICE_ID_INTEL_CNPH 0xa36e
#define PCI_INTEL_BXT_DSM_GUID "732b85d5-b7a7-4a1b-9ba0-4bbd00ffd511"
#define PCI_INTEL_BXT_FUNC_PMU_PWR 4
#define PCI_INTEL_BXT_STATE_D0 0
#define PCI_INTEL_BXT_STATE_D3 3
/**
* struct dwc3_pci - Driver private structure
* @dwc3: child dwc3 platform_device
* @pci: our link to PCI bus
* @guid: _DSM GUID
* @has_dsm_for_pm: true for devices which need to run _DSM on runtime PM
*/
struct dwc3_pci {
struct platform_device *dwc3;
struct pci_dev *pci;
guid_t guid;
unsigned int has_dsm_for_pm:1;
};
static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
{ "reset-gpios", &reset_gpios, 1 },
{ "cs-gpios", &cs_gpios, 1 },
{ },
};
static int dwc3_pci_quirks(struct dwc3_pci *dwc)
{
struct platform_device *dwc3 = dwc->dwc3;
struct pci_dev *pdev = dwc->pci;
if (pdev->vendor == PCI_VENDOR_ID_AMD &&
pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
struct property_entry properties[] = {
PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf),
PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"),
PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"),
PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"),
PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"),
PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"),
PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"),
PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"),
PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"),
PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1),
/*
* FIXME these quirks should be removed when AMD NL
* tapes out
*/
PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"),
PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
{ },
};
return platform_device_add_properties(dwc3, properties);
}
if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
int ret;
struct property_entry properties[] = {
PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
{ }
};
ret = platform_device_add_properties(dwc3, properties);
if (ret < 0)
return ret;
if (pdev->device == PCI_DEVICE_ID_INTEL_BXT ||
pdev->device == PCI_DEVICE_ID_INTEL_BXT_M) {
guid_parse(PCI_INTEL_BXT_DSM_GUID, &dwc->guid);
dwc->has_dsm_for_pm = true;
}
if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
struct gpio_desc *gpio;
ret = devm_acpi_dev_add_driver_gpios(&pdev->dev,
acpi_dwc3_byt_gpios);
if (ret)
dev_dbg(&pdev->dev, "failed to add mapping table\n");
/*
* These GPIOs will turn on the USB2 PHY. Note that we have to
* put the gpio descriptors again here because the phy driver
* might want to grab them, too.
*/
gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
if (IS_ERR(gpio))
return PTR_ERR(gpio);
gpiod_set_value_cansleep(gpio, 1);
gpiod_put(gpio);
gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(gpio))
return PTR_ERR(gpio);
if (gpio) {
gpiod_set_value_cansleep(gpio, 1);
gpiod_put(gpio);
usleep_range(10000, 11000);
}
}
}
if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
(pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 ||
pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI ||
pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) {
struct property_entry properties[] = {
PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"),
PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"),
PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
{ },
};
return platform_device_add_properties(dwc3, properties);
}
return 0;
}
static int dwc3_pci_probe(struct pci_dev *pci,
const struct pci_device_id *id)
{
struct dwc3_pci *dwc;
struct resource res[2];
int ret;
struct device *dev = &pci->dev;
ret = pcim_enable_device(pci);
if (ret) {
dev_err(dev, "failed to enable pci device\n");
return -ENODEV;
}
pci_set_master(pci);
dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL);
if (!dwc)
return -ENOMEM;
dwc->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
if (!dwc->dwc3)
return -ENOMEM;
memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
res[0].start = pci_resource_start(pci, 0);
res[0].end = pci_resource_end(pci, 0);
res[0].name = "dwc_usb3";
res[0].flags = IORESOURCE_MEM;
res[1].start = pci->irq;
res[1].name = "dwc_usb3";
res[1].flags = IORESOURCE_IRQ;
ret = platform_device_add_resources(dwc->dwc3, res, ARRAY_SIZE(res));
if (ret) {
dev_err(dev, "couldn't add resources to dwc3 device\n");
return ret;
}
dwc->pci = pci;
dwc->dwc3->dev.parent = dev;
ACPI_COMPANION_SET(&dwc->dwc3->dev, ACPI_COMPANION(dev));
ret = dwc3_pci_quirks(dwc);
if (ret)
goto err;
ret = platform_device_add(dwc->dwc3);
if (ret) {
dev_err(dev, "failed to register dwc3 device\n");
goto err;
}
device_init_wakeup(dev, true);
pci_set_drvdata(pci, dwc);
pm_runtime_put(dev);
return 0;
err:
platform_device_put(dwc->dwc3);
return ret;
}
static void dwc3_pci_remove(struct pci_dev *pci)
{
struct dwc3_pci *dwc = pci_get_drvdata(pci);
device_init_wakeup(&pci->dev, false);
pm_runtime_get(&pci->dev);
platform_device_unregister(dwc->dwc3);
}
static const struct pci_device_id dwc3_pci_id_table[] = {
{
PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
},
{
PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
},
{
PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
},
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_KBP), },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_GLK), },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CNPLP), },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CNPH), },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
{ } /* Terminating Entry */
};
MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
#if defined(CONFIG_PM) || defined(CONFIG_PM_SLEEP)
static int dwc3_pci_dsm(struct dwc3_pci *dwc, int param)
{
union acpi_object *obj;
union acpi_object tmp;
union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
if (!dwc->has_dsm_for_pm)
return 0;
tmp.type = ACPI_TYPE_INTEGER;
tmp.integer.value = param;
obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), &dwc->guid,
1, PCI_INTEL_BXT_FUNC_PMU_PWR, &argv4);
if (!obj) {
dev_err(&dwc->pci->dev, "failed to evaluate _DSM\n");
return -EIO;
}
ACPI_FREE(obj);
return 0;
}
#endif /* CONFIG_PM || CONFIG_PM_SLEEP */
#ifdef CONFIG_PM
static int dwc3_pci_runtime_suspend(struct device *dev)
{
struct dwc3_pci *dwc = dev_get_drvdata(dev);
if (device_can_wakeup(dev))
return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
return -EBUSY;
}
static int dwc3_pci_runtime_resume(struct device *dev)
{
struct dwc3_pci *dwc = dev_get_drvdata(dev);
struct platform_device *dwc3 = dwc->dwc3;
int ret;
ret = dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
if (ret)
return ret;
return pm_runtime_get(&dwc3->dev);
}
#endif /* CONFIG_PM */
#ifdef CONFIG_PM_SLEEP
static int dwc3_pci_suspend(struct device *dev)
{
struct dwc3_pci *dwc = dev_get_drvdata(dev);
return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
}
static int dwc3_pci_resume(struct device *dev)
{
struct dwc3_pci *dwc = dev_get_drvdata(dev);
return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
}
#endif /* CONFIG_PM_SLEEP */
static struct dev_pm_ops dwc3_pci_dev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_runtime_resume,
NULL)
};
static struct pci_driver dwc3_pci_driver = {
.name = "dwc3-pci",
.id_table = dwc3_pci_id_table,
.probe = dwc3_pci_probe,
.remove = dwc3_pci_remove,
.driver = {
.pm = &dwc3_pci_dev_pm_ops,
}
};
MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
module_pci_driver(dwc3_pci_driver);
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