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path: root/drivers/usb/dwc2
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Diffstat (limited to 'drivers/usb/dwc2')
-rw-r--r--drivers/usb/dwc2/Kconfig1
-rw-r--r--drivers/usb/dwc2/core.c2
-rw-r--r--drivers/usb/dwc2/core.h8
-rw-r--r--drivers/usb/dwc2/hcd.c20
-rw-r--r--drivers/usb/dwc2/hcd.h1
-rw-r--r--drivers/usb/dwc2/params.c10
-rw-r--r--drivers/usb/dwc2/platform.c32
7 files changed, 58 insertions, 16 deletions
diff --git a/drivers/usb/dwc2/Kconfig b/drivers/usb/dwc2/Kconfig
index 68d095ae2865..16e1aa304edc 100644
--- a/drivers/usb/dwc2/Kconfig
+++ b/drivers/usb/dwc2/Kconfig
@@ -58,7 +58,6 @@ config USB_DWC2_PCI
tristate "DWC2 PCI"
depends on USB_PCI
depends on USB_GADGET || !USB_GADGET
- default n
select NOP_USB_XCEIV
help
The Designware USB2.0 PCI interface module for controllers
diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
index 8b499d643461..8e41d70fd298 100644
--- a/drivers/usb/dwc2/core.c
+++ b/drivers/usb/dwc2/core.c
@@ -531,7 +531,7 @@ int dwc2_core_reset(struct dwc2_hsotg *hsotg, bool skip_wait)
}
/* Wait for AHB master IDLE state */
- if (dwc2_hsotg_wait_bit_set(hsotg, GRSTCTL, GRSTCTL_AHBIDLE, 50)) {
+ if (dwc2_hsotg_wait_bit_set(hsotg, GRSTCTL, GRSTCTL_AHBIDLE, 10000)) {
dev_warn(hsotg->dev, "%s: HANG! AHB Idle timeout GRSTCTL GRSTCTL_AHBIDLE\n",
__func__);
return -EBUSY;
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 152ac41dfb2d..d08d070a0fb6 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -861,6 +861,9 @@ struct dwc2_hregs_backup {
* @hibernated: True if core is hibernated
* @reset_phy_on_wake: Quirk saying that we should assert PHY reset on a
* remote wakeup.
+ * @phy_off_for_suspend: Status of whether we turned the PHY off at suspend.
+ * @need_phy_for_wake: Quirk saying that we should keep the PHY on at
+ * suspend if we need USB to wake us up.
* @frame_number: Frame number read from the core. For both device
* and host modes. The value ranges are from 0
* to HFNUM_MAX_FRNUM.
@@ -1049,6 +1052,8 @@ struct dwc2_hsotg {
unsigned int ll_hw_enabled:1;
unsigned int hibernated:1;
unsigned int reset_phy_on_wake:1;
+ unsigned int need_phy_for_wake:1;
+ unsigned int phy_off_for_suspend:1;
u16 frame_number;
struct phy *phy;
@@ -1438,6 +1443,7 @@ int dwc2_restore_host_registers(struct dwc2_hsotg *hsotg);
int dwc2_host_enter_hibernation(struct dwc2_hsotg *hsotg);
int dwc2_host_exit_hibernation(struct dwc2_hsotg *hsotg,
int rem_wakeup, int reset);
+bool dwc2_host_can_poweroff_phy(struct dwc2_hsotg *dwc2);
static inline void dwc2_host_schedule_phy_reset(struct dwc2_hsotg *hsotg)
{ schedule_work(&hsotg->phy_reset_work); }
#else
@@ -1463,6 +1469,8 @@ static inline int dwc2_host_enter_hibernation(struct dwc2_hsotg *hsotg)
static inline int dwc2_host_exit_hibernation(struct dwc2_hsotg *hsotg,
int rem_wakeup, int reset)
{ return 0; }
+static inline bool dwc2_host_can_poweroff_phy(struct dwc2_hsotg *dwc2)
+{ return false; }
static inline void dwc2_host_schedule_phy_reset(struct dwc2_hsotg *hsotg) {}
#endif
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index 2192a2873c7c..ee144ff8af5b 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -4685,7 +4685,6 @@ fail2:
spin_unlock_irqrestore(&hsotg->lock, flags);
urb->hcpriv = NULL;
kfree(qtd);
- qtd = NULL;
fail1:
if (qh_allocated) {
struct dwc2_qtd *qtd2, *qtd2_tmp;
@@ -5587,3 +5586,22 @@ int dwc2_host_exit_hibernation(struct dwc2_hsotg *hsotg, int rem_wakeup,
dev_dbg(hsotg->dev, "Host hibernation restore complete\n");
return ret;
}
+
+bool dwc2_host_can_poweroff_phy(struct dwc2_hsotg *dwc2)
+{
+ struct usb_device *root_hub = dwc2_hsotg_to_hcd(dwc2)->self.root_hub;
+
+ /* If the controller isn't allowed to wakeup then we can power off. */
+ if (!device_may_wakeup(dwc2->dev))
+ return true;
+
+ /*
+ * We don't want to power off the PHY if something under the
+ * root hub has wakeup enabled.
+ */
+ if (usb_wakeup_enabled_descendants(root_hub))
+ return false;
+
+ /* No reason to keep the PHY powered, so allow poweroff */
+ return true;
+}
diff --git a/drivers/usb/dwc2/hcd.h b/drivers/usb/dwc2/hcd.h
index ce6445a06588..8ca6d12a6f57 100644
--- a/drivers/usb/dwc2/hcd.h
+++ b/drivers/usb/dwc2/hcd.h
@@ -582,7 +582,6 @@ static inline void dwc2_hcd_qtd_unlink_and_free(struct dwc2_hsotg *hsotg,
{
list_del(&qtd->qtd_list_entry);
kfree(qtd);
- qtd = NULL;
}
/* Descriptor DMA support functions */
diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
index 6900eea57526..55f841a54015 100644
--- a/drivers/usb/dwc2/params.c
+++ b/drivers/usb/dwc2/params.c
@@ -76,6 +76,7 @@ static void dwc2_set_s3c6400_params(struct dwc2_hsotg *hsotg)
struct dwc2_core_params *p = &hsotg->params;
p->power_down = 0;
+ p->phy_utmi_width = 8;
}
static void dwc2_set_rk_params(struct dwc2_hsotg *hsotg)
@@ -253,6 +254,15 @@ static void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
val = (hsotg->hw_params.utmi_phy_data_width ==
GHWCFG4_UTMI_PHY_DATA_WIDTH_8) ? 8 : 16;
+ if (hsotg->phy) {
+ /*
+ * If using the generic PHY framework, check if the PHY bus
+ * width is 8-bit and set the phyif appropriately.
+ */
+ if (phy_get_bus_width(hsotg->phy) == 8)
+ val = 8;
+ }
+
hsotg->params.phy_utmi_width = val;
}
diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index d10a7f8daec3..80fd3c6dcd1c 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -271,15 +271,6 @@ static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)
hsotg->plat = dev_get_platdata(hsotg->dev);
- if (hsotg->phy) {
- /*
- * If using the generic PHY framework, check if the PHY bus
- * width is 8-bit and set the phyif appropriately.
- */
- if (phy_get_bus_width(hsotg->phy) == 8)
- hsotg->params.phy_utmi_width = 8;
- }
-
/* Clock */
hsotg->clk = devm_clk_get_optional(hsotg->dev, "otg");
if (IS_ERR(hsotg->clk)) {
@@ -447,6 +438,10 @@ static int dwc2_driver_probe(struct platform_device *dev)
if (retval)
goto error;
+ hsotg->need_phy_for_wake =
+ of_property_read_bool(dev->dev.of_node,
+ "snps,need-phy-for-wake");
+
/*
* Reset before dwc2_get_hwparams() then it could get power-on real
* reset value form registers.
@@ -478,6 +473,14 @@ static int dwc2_driver_probe(struct platform_device *dev)
hsotg->gadget_enabled = 1;
}
+ /*
+ * If we need PHY for wakeup we must be wakeup capable.
+ * When we have a device that can wake without the PHY we
+ * can adjust this condition.
+ */
+ if (hsotg->need_phy_for_wake)
+ device_set_wakeup_capable(&dev->dev, true);
+
hsotg->reset_phy_on_wake =
of_property_read_bool(dev->dev.of_node,
"snps,reset-phy-on-wake");
@@ -516,13 +519,17 @@ error:
static int __maybe_unused dwc2_suspend(struct device *dev)
{
struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
+ bool is_device_mode = dwc2_is_device_mode(dwc2);
int ret = 0;
- if (dwc2_is_device_mode(dwc2))
+ if (is_device_mode)
dwc2_hsotg_suspend(dwc2);
- if (dwc2->ll_hw_enabled)
+ if (dwc2->ll_hw_enabled &&
+ (is_device_mode || dwc2_host_can_poweroff_phy(dwc2))) {
ret = __dwc2_lowlevel_hw_disable(dwc2);
+ dwc2->phy_off_for_suspend = true;
+ }
return ret;
}
@@ -532,11 +539,12 @@ static int __maybe_unused dwc2_resume(struct device *dev)
struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
int ret = 0;
- if (dwc2->ll_hw_enabled) {
+ if (dwc2->phy_off_for_suspend && dwc2->ll_hw_enabled) {
ret = __dwc2_lowlevel_hw_enable(dwc2);
if (ret)
return ret;
}
+ dwc2->phy_off_for_suspend = false;
if (dwc2_is_device_mode(dwc2))
ret = dwc2_hsotg_resume(dwc2);
generated by cgit (git 2.34.1) at 2025-04-12 18:20:45 +0000