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usb: cdns3: host: add .suspend_quirk for xhci-plat.c 

cdns3 has some special PM sequence between xhci_bus_suspend and
xhci_suspend, add quirk to implement it.

Reviewed-by: Pawel Laszczak <pawell@cadence.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
This commit is contained in:
Peter Chen 2020-05-22 17:56:30 +08:00
parent cdd3013dcc
commit ed22764847
No known key found for this signature in database
GPG Key ID: 4859298150D671BB
2 changed files with 49 additions and 0 deletions
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6
drivers/usb/cdns3/host-export.h
View File

@ -9,9 +9,11 @@
#ifndef __LINUX_CDNS3_HOST_EXPORT
#define __LINUX_CDNS3_HOST_EXPORT
struct usb_hcd;
#ifdef CONFIG_USB_CDNS3_HOST
int cdns3_host_init(struct cdns3 *cdns);
int xhci_cdns3_suspend_quirk(struct usb_hcd *hcd);
#else
@ -21,6 +23,10 @@ static inline int cdns3_host_init(struct cdns3 *cdns)
}
static inline void cdns3_host_exit(struct cdns3 *cdns) { }
static inline int xhci_cdns3_suspend_quirk(struct usb_hcd *hcd)
{
return 0;
}
#endif /* CONFIG_USB_CDNS3_HOST */

43
drivers/usb/cdns3/host.c
View File

@ -14,6 +14,18 @@
#include "drd.h"
#include "host-export.h"
#include <linux/usb/hcd.h>
#include "../host/xhci.h"
#include "../host/xhci-plat.h"
#define XECP_PORT_CAP_REG 0x8000
#define XECP_AUX_CTRL_REG1 0x8120
#define CFG_RXDET_P3_EN BIT(15)
#define LPM_2_STB_SWITCH_EN BIT(25)
static const struct xhci_plat_priv xhci_plat_cdns3_xhci = {
.suspend_quirk = xhci_cdns3_suspend_quirk,
};
static int __cdns3_host_init(struct cdns3 *cdns)
{
@ -39,6 +51,11 @@ static int __cdns3_host_init(struct cdns3 *cdns)
goto err1;
}
ret = platform_device_add_data(xhci, &xhci_plat_cdns3_xhci,
sizeof(struct xhci_plat_priv));
if (ret)
goto err1;
ret = platform_device_add(xhci);
if (ret) {
dev_err(cdns->dev, "failed to register xHCI device\n");
@ -56,6 +73,32 @@ err1:
return ret;
}
int xhci_cdns3_suspend_quirk(struct usb_hcd *hcd)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
u32 value;
if (pm_runtime_status_suspended(hcd->self.controller))
return 0;
/* set usbcmd.EU3S */
value = readl(&xhci->op_regs->command);
value |= CMD_PM_INDEX;
writel(value, &xhci->op_regs->command);
if (hcd->regs) {
value = readl(hcd->regs + XECP_AUX_CTRL_REG1);
value |= CFG_RXDET_P3_EN;
writel(value, hcd->regs + XECP_AUX_CTRL_REG1);
value = readl(hcd->regs + XECP_PORT_CAP_REG);
value |= LPM_2_STB_SWITCH_EN;
writel(value, hcd->regs + XECP_PORT_CAP_REG);
}
return 0;
}
static void cdns3_host_exit(struct cdns3 *cdns)
{
platform_device_unregister(cdns->host_dev);