[RFC PATCH v2 52/64] usb: dwc3: import from kernel v6.8
Jens Wiklander
jens.wiklander at linaro.org
Thu May 7 11:27:59 CEST 2026
Sync Linux kernel dwc3 changes from v6.7 to v6.8.
The following files are preserved accross the import:
Makefile Kconfig dwc3-meson-g12a.c dwc3-meson-gxl.c dwc3-omap.c
dwc3-uniphier.c dwc3-generic.h dwc3-generic.c dwc3-generic-sti.c
dwc3-layerscape.c ti_usb_phy.c
Skipping unused files:
debugfs.c drd.c dwc3-exynos.c dwc3-haps.c dwc3-imx8mp.c dwc3-keystone.c
dwc3-octeon.c dwc3-of-simple.c dwc3-pci.c dwc3-qcom.c dwc3-qcom-legacy.c
dwc3-rtk.c dwc3-st.c dwc3-xilinx.c host.c trace.c trace.h ulpi.c
Note that this is a raw import and doesn't build.
A fixup commit at the end of the series fixes that.
List of commits: git log --oneline v6.7..v6.8
Commits imported:
b191a18cb5c4 usb: dwc3: gadget: Don't disconnect if not started
7d708c145b26 Revert "usb: dwc3: Support EBC feature of DWC_usb31"
61a348857e86 usb: dwc3: gadget: Fix NULL pointer dereference in dwc3_gadget_suspend
de4b5b28c87c usb: dwc3: pci: add support for the Intel Arrow Lake-H
817349b6d26a usb: dwc3: host: Set XHCI_SG_TRB_CACHE_SIZE_QUIRK
aefdcd89d72b usb: dwc3: qcom: Rename hs_phy_irq to qusb2_phy_irq
3c7af52c7616 usb: dwc3: gadget: Queue PM runtime idle on disconnect event
68c26fe58182 usb: dwc3: set pm runtime active before resume common
398aa9a7e77c usb: dwc3: Support EBC feature of DWC_usb31
91736d0619eb usb: dwc3: core: set force_gen1 bit in USB31 devices if max speed is SS
e9d40b215e38 usb: dwc: ep0: Update request status in dwc3_ep0_stall_restart
730e12fbec53 usb: dwc3: gadget: Handle EP0 request dequeuing properly
afe28cd686ae Revert "usb: dwc3: don't reset device side if dwc3 was configured as host-only"
7059fbebcb00 Revert "usb: dwc3: Soft reset phy on probe for host"
c084af69a8f4 usb: dwc3: imx8mp: Fix smatch warning
53b5ff83d893 usb: dwc3: xilinx: improve error handling for PM APIs
3396b3372e61 Merge 6.7-rc3 into usb-next
Signed-off-by: Jens Wiklander <jens.wiklander at linaro.org>
---
drivers/usb/dwc3/core.c | 60 +++++++++++++--------------------------
drivers/usb/dwc3/core.h | 5 ++++
drivers/usb/dwc3/ep0.c | 5 +++-
drivers/usb/dwc3/gadget.c | 30 ++++++++++++++++----
4 files changed, 53 insertions(+), 47 deletions(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index b101dbf8c5dc..3e55838c0001 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -277,48 +277,11 @@ int dwc3_core_soft_reset(struct dwc3 *dwc)
/*
* We're resetting only the device side because, if we're in host mode,
* XHCI driver will reset the host block. If dwc3 was configured for
- * host-only mode or current role is host, then we can return early.
+ * host-only mode, then we can return early.
*/
if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST)
return 0;
- /*
- * If the dr_mode is host and the dwc->current_dr_role is not the
- * corresponding DWC3_GCTL_PRTCAP_HOST, then the dwc3_core_init_mode
- * isn't executed yet. Ensure the phy is ready before the controller
- * updates the GCTL.PRTCAPDIR or other settings by soft-resetting
- * the phy.
- *
- * Note: GUSB3PIPECTL[n] and GUSB2PHYCFG[n] are port settings where n
- * is port index. If this is a multiport host, then we need to reset
- * all active ports.
- */
- if (dwc->dr_mode == USB_DR_MODE_HOST) {
- u32 usb3_port;
- u32 usb2_port;
-
- usb3_port = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
- usb3_port |= DWC3_GUSB3PIPECTL_PHYSOFTRST;
- dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), usb3_port);
-
- usb2_port = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
- usb2_port |= DWC3_GUSB2PHYCFG_PHYSOFTRST;
- dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), usb2_port);
-
- /* Small delay for phy reset assertion */
- usleep_range(1000, 2000);
-
- usb3_port &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST;
- dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), usb3_port);
-
- usb2_port &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST;
- dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), usb2_port);
-
- /* Wait for clock synchronization */
- msleep(50);
- return 0;
- }
-
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
reg |= DWC3_DCTL_CSFTRST;
reg &= ~DWC3_DCTL_RUN_STOP;
@@ -1367,6 +1330,18 @@ static int dwc3_core_init(struct dwc3 *dwc)
dwc3_config_threshold(dwc);
+ /*
+ * Modify this for all supported Super Speed ports when
+ * multiport support is added.
+ */
+ if (hw_mode != DWC3_GHWPARAMS0_MODE_GADGET &&
+ (DWC3_IP_IS(DWC31)) &&
+ dwc->maximum_speed == USB_SPEED_SUPER) {
+ reg = dwc3_readl(dwc->regs, DWC3_LLUCTL);
+ reg |= DWC3_LLUCTL_FORCE_GEN1;
+ dwc3_writel(dwc->regs, DWC3_LLUCTL, reg);
+ }
+
return 0;
err_power_off_phy:
@@ -2340,12 +2315,15 @@ static int dwc3_resume(struct device *dev)
pinctrl_pm_select_default_state(dev);
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+
ret = dwc3_resume_common(dwc, PMSG_RESUME);
- if (ret)
+ if (ret) {
+ pm_runtime_set_suspended(dev);
return ret;
+ }
- pm_runtime_disable(dev);
- pm_runtime_set_active(dev);
pm_runtime_enable(dev);
return 0;
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index efe6caf4d0e8..e120611a5174 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -172,6 +172,8 @@
#define DWC3_OEVTEN 0xcc0C
#define DWC3_OSTS 0xcc10
+#define DWC3_LLUCTL 0xd024
+
/* Bit fields */
/* Global SoC Bus Configuration INCRx Register 0 */
@@ -657,6 +659,9 @@
#define DWC3_OSTS_VBUSVLD BIT(1)
#define DWC3_OSTS_CONIDSTS BIT(0)
+/* Force Gen1 speed on Gen2 link */
+#define DWC3_LLUCTL_FORCE_GEN1 BIT(10)
+
/* Structures */
struct dwc3_trb;
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index b94243237293..6ae8a36f21cf 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -238,7 +238,10 @@ void dwc3_ep0_stall_and_restart(struct dwc3 *dwc)
struct dwc3_request *req;
req = next_request(&dep->pending_list);
- dwc3_gadget_giveback(dep, req, -ECONNRESET);
+ if (!dwc->connected)
+ dwc3_gadget_giveback(dep, req, -ESHUTDOWN);
+ else
+ dwc3_gadget_giveback(dep, req, -ECONNRESET);
}
dwc->eps[0]->trb_enqueue = 0;
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 858fe4c299b7..28f49400f3e8 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2103,7 +2103,17 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep,
list_for_each_entry(r, &dep->pending_list, list) {
if (r == req) {
- dwc3_gadget_giveback(dep, req, -ECONNRESET);
+ /*
+ * Explicitly check for EP0/1 as dequeue for those
+ * EPs need to be handled differently. Control EP
+ * only deals with one USB req, and giveback will
+ * occur during dwc3_ep0_stall_and_restart(). EP0
+ * requests are never added to started_list.
+ */
+ if (dep->number > 1)
+ dwc3_gadget_giveback(dep, req, -ECONNRESET);
+ else
+ dwc3_ep0_reset_state(dwc);
goto out;
}
}
@@ -2640,6 +2650,11 @@ static int dwc3_gadget_soft_disconnect(struct dwc3 *dwc)
int ret;
spin_lock_irqsave(&dwc->lock, flags);
+ if (!dwc->pullups_connected) {
+ spin_unlock_irqrestore(&dwc->lock, flags);
+ return 0;
+ }
+
dwc->connected = false;
/*
@@ -3973,6 +3988,13 @@ static void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc)
usb_gadget_set_state(dwc->gadget, USB_STATE_NOTATTACHED);
dwc3_ep0_reset_state(dwc);
+
+ /*
+ * Request PM idle to address condition where usage count is
+ * already decremented to zero, but waiting for the disconnect
+ * interrupt to set dwc->connected to FALSE.
+ */
+ pm_request_idle(dwc->dev);
}
static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc)
@@ -4686,15 +4708,13 @@ int dwc3_gadget_suspend(struct dwc3 *dwc)
unsigned long flags;
int ret;
- if (!dwc->gadget_driver)
- return 0;
-
ret = dwc3_gadget_soft_disconnect(dwc);
if (ret)
goto err;
spin_lock_irqsave(&dwc->lock, flags);
- dwc3_disconnect_gadget(dwc);
+ if (dwc->gadget_driver)
+ dwc3_disconnect_gadget(dwc);
spin_unlock_irqrestore(&dwc->lock, flags);
return 0;
--
2.43.0
More information about the U-Boot
mailing list