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authorYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>2017-04-19 15:55:48 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-04-19 19:59:17 +0200
commit435cc1138ec94af7497ea68c8eb8b0c17cfcf002 (patch)
treee3f947ca678dd59e6b5e588c651e3f67d6186c46 /drivers/usb/host
parentusb: host: xhci-plat: add resume_quirk() (diff)
downloadlinux-435cc1138ec94af7497ea68c8eb8b0c17cfcf002.tar.xz
linux-435cc1138ec94af7497ea68c8eb8b0c17cfcf002.zip
usb: host: xhci-plat: set resume_quirk() for R-Car controllers
This patch sets resume_quirk() for R-Car controllers to re-download the firmware in resume timing. Otherwise, if the controller's power is down in suspend timing, the firmware in the controller goes away, and then the controller doesn't work after resume. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host')
-rw-r--r--drivers/usb/host/xhci-plat.c3
-rw-r--r--drivers/usb/host/xhci-rcar.c11
-rw-r--r--drivers/usb/host/xhci-rcar.h6
3 files changed, 20 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 8ab517f94b24..057571fab599 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -103,18 +103,21 @@ static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V1,
.init_quirk = xhci_rcar_init_quirk,
.plat_start = xhci_rcar_start,
+ .resume_quirk = xhci_rcar_resume_quirk,
};
static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V2,
.init_quirk = xhci_rcar_init_quirk,
.plat_start = xhci_rcar_start,
+ .resume_quirk = xhci_rcar_resume_quirk,
};
static const struct xhci_plat_priv xhci_plat_renesas_rcar_r8a7796 = {
.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V3,
.init_quirk = xhci_rcar_init_quirk,
.plat_start = xhci_rcar_start,
+ .resume_quirk = xhci_rcar_resume_quirk,
};
static const struct of_device_id usb_xhci_of_match[] = {
diff --git a/drivers/usb/host/xhci-rcar.c b/drivers/usb/host/xhci-rcar.c
index d28df386e780..07278228214b 100644
--- a/drivers/usb/host/xhci-rcar.c
+++ b/drivers/usb/host/xhci-rcar.c
@@ -198,3 +198,14 @@ int xhci_rcar_init_quirk(struct usb_hcd *hcd)
return xhci_rcar_download_firmware(hcd);
}
+
+int xhci_rcar_resume_quirk(struct usb_hcd *hcd)
+{
+ int ret;
+
+ ret = xhci_rcar_download_firmware(hcd);
+ if (!ret)
+ xhci_rcar_start(hcd);
+
+ return ret;
+}
diff --git a/drivers/usb/host/xhci-rcar.h b/drivers/usb/host/xhci-rcar.h
index d2ffe20401cf..d247951147a1 100644
--- a/drivers/usb/host/xhci-rcar.h
+++ b/drivers/usb/host/xhci-rcar.h
@@ -18,6 +18,7 @@
#if IS_ENABLED(CONFIG_USB_XHCI_RCAR)
void xhci_rcar_start(struct usb_hcd *hcd);
int xhci_rcar_init_quirk(struct usb_hcd *hcd);
+int xhci_rcar_resume_quirk(struct usb_hcd *hcd);
#else
static inline void xhci_rcar_start(struct usb_hcd *hcd)
{
@@ -27,5 +28,10 @@ static inline int xhci_rcar_init_quirk(struct usb_hcd *hcd)
{
return 0;
}
+
+static inline int xhci_rcar_resume_quirk(struct usb_hcd *hcd)
+{
+ return 0;
+}
#endif
#endif /* _XHCI_RCAR_H */