// SPDX-License-Identifier: GPL-2.0
/*
* host . c - DesignWare USB3 DRD Controller Host Glue
*
* Copyright ( C ) 2011 Texas Instruments Incorporated - https : //www.ti.com
*
* Authors : Felipe Balbi < balbi @ ti . com > ,
*/
#include <linux/irq.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include "../host/xhci-port.h"
#include "../host/xhci-ext-caps.h"
#include "../host/xhci-caps.h"
#include "../host/xhci-plat.h"
#include "core.h"
#define XHCI_HCSPARAMS1 0 x4
#define XHCI_PORTSC_BASE 0 x400
/**
* dwc3_power_off_all_roothub_ports - Power off all Root hub ports
* @ dwc : Pointer to our controller context structure
*/
static void dwc3_power_off_all_roothub_ports(struct dwc3 *dwc)
{
void __iomem *xhci_regs;
u32 op_regs_base;
int port_num;
u32 offset;
u32 reg;
int i;
/* xhci regs are not mapped yet, do it temporarily here */
if (dwc->xhci_resources[0 ].start) {
xhci_regs = ioremap(dwc->xhci_resources[0 ].start, DWC3_XHCI_REGS_END);
if (!xhci_regs) {
dev_err(dwc->dev, "Failed to ioremap xhci_regs\n" );
return ;
}
op_regs_base = HC_LENGTH(readl(xhci_regs));
reg = readl(xhci_regs + XHCI_HCSPARAMS1);
port_num = HCS_MAX_PORTS(reg);
for (i = 1 ; i <= port_num; i++) {
offset = op_regs_base + XHCI_PORTSC_BASE + 0 x10 * (i - 1 );
reg = readl(xhci_regs + offset);
reg &= ~PORT_POWER;
writel(reg, xhci_regs + offset);
}
iounmap(xhci_regs);
} else {
dev_err(dwc->dev, "xhci base reg invalid\n" );
}
}
static void dwc3_xhci_plat_start(struct usb_hcd *hcd)
{
struct platform_device *pdev;
struct dwc3 *dwc;
if (!usb_hcd_is_primary_hcd(hcd))
return ;
pdev = to_platform_device(hcd->self.controller);
dwc = dev_get_drvdata(pdev->dev.parent);
dwc3_enable_susphy(dwc, true );
}
static const struct xhci_plat_priv dwc3_xhci_plat_quirk = {
.plat_start = dwc3_xhci_plat_start,
};
static void dwc3_host_fill_xhci_irq_res(struct dwc3 *dwc,
int irq, char *name)
{
struct platform_device *pdev = to_platform_device(dwc->dev);
struct device_node *np = dev_of_node(&pdev->dev);
dwc->xhci_resources[1 ].start = irq;
dwc->xhci_resources[1 ].end = irq;
dwc->xhci_resources[1 ].flags = IORESOURCE_IRQ | irq_get_trigger_type(irq);
if (!name && np)
dwc->xhci_resources[1 ].name = of_node_full_name(pdev->dev.of_node);
else
dwc->xhci_resources[1 ].name = name;
}
static int dwc3_host_get_irq(struct dwc3 *dwc)
{
struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
int irq;
irq = platform_get_irq_byname_optional(dwc3_pdev, "host" );
if (irq > 0 ) {
dwc3_host_fill_xhci_irq_res(dwc, irq, "host" );
goto out;
}
if (irq == -EPROBE_DEFER)
goto out;
irq = platform_get_irq_byname_optional(dwc3_pdev, "dwc_usb3" );
if (irq > 0 ) {
dwc3_host_fill_xhci_irq_res(dwc, irq, "dwc_usb3" );
goto out;
}
if (irq == -EPROBE_DEFER)
goto out;
irq = platform_get_irq(dwc3_pdev, 0 );
if (irq > 0 )
dwc3_host_fill_xhci_irq_res(dwc, irq, NULL);
out:
return irq;
}
int dwc3_host_init(struct dwc3 *dwc)
{
struct property_entry props[6 ];
struct platform_device *xhci;
int ret, irq;
int prop_idx = 0 ;
/*
* Some platforms need to power off all Root hub ports immediately after DWC3 set to host
* mode to avoid VBUS glitch happen when xhci get reset later .
*/
dwc3_power_off_all_roothub_ports(dwc);
irq = dwc3_host_get_irq(dwc);
if (irq < 0 )
return irq;
xhci = platform_device_alloc("xhci-hcd" , PLATFORM_DEVID_AUTO);
if (!xhci) {
dev_err(dwc->dev, "couldn't allocate xHCI device\n" );
return -ENOMEM;
}
xhci->dev.parent = dwc->dev;
dwc->xhci = xhci;
ret = platform_device_add_resources(xhci, dwc->xhci_resources,
DWC3_XHCI_RESOURCES_NUM);
if (ret) {
dev_err(dwc->dev, "couldn't add resources to xHCI device\n" );
goto err;
}
memset(props, 0 , sizeof (struct property_entry) * ARRAY_SIZE(props));
props[prop_idx++] = PROPERTY_ENTRY_BOOL("xhci-sg-trb-cache-size-quirk" );
props[prop_idx++] = PROPERTY_ENTRY_BOOL("write-64-hi-lo-quirk" );
if (dwc->usb3_lpm_capable)
props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable" );
if (dwc->usb2_lpm_disable)
props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb2-lpm-disable" );
/**
* WORKAROUND : dwc3 revisions < = 3 . 00 a have a limitation
* where Port Disable command doesn ' t work .
*
* The suggested workaround is that we avoid Port Disable
* completely .
*
* This following flag tells XHCI to do just that .
*/
if (DWC3_VER_IS_WITHIN(DWC3, ANY, 300 A))
props[prop_idx++] = PROPERTY_ENTRY_BOOL("quirk-broken-port-ped" );
props[prop_idx++] = PROPERTY_ENTRY_U16("num-hc-interrupters" ,
dwc->num_hc_interrupters);
if (prop_idx) {
ret = device_create_managed_software_node(&xhci->dev, props, NULL);
if (ret) {
dev_err(dwc->dev, "failed to add properties to xHCI\n" );
goto err;
}
}
ret = platform_device_add_data(xhci, &dwc3_xhci_plat_quirk,
sizeof (struct xhci_plat_priv));
if (ret)
goto err;
ret = platform_device_add(xhci);
if (ret) {
dev_err(dwc->dev, "failed to register xHCI device\n" );
goto err;
}
if (dwc->sys_wakeup) {
/* Restore wakeup setting if switched from device */
device_wakeup_enable(dwc->sysdev);
/* Pass on wakeup setting to the new xhci platform device */
device_init_wakeup(&xhci->dev, true );
}
return 0 ;
err:
platform_device_put(xhci);
return ret;
}
void dwc3_host_exit(struct dwc3 *dwc)
{
if (dwc->sys_wakeup)
device_init_wakeup(&dwc->xhci->dev, false );
dwc3_enable_susphy(dwc, false );
platform_device_unregister(dwc->xhci);
dwc->xhci = NULL;
}
Messung V0.5 in Prozent C=97 H=78 G=87
¤ Dauer der Verarbeitung: 0.8 Sekunden
(vorverarbeitet am 2026-09-29)
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