Revert "usb: dwc3: core: Prevent phy suspend during init"

This reverts commit 6d73572.

This breaks USB3 on Apple silicon systems and manifests in

| phy-apple-atc b03000000.phy: pipehandler lock not acked, this type-c port is probably dead until the next reboot.

Revert for now as the ATC phy initialization is due a rewrite.

Signed-off-by: Janne Grunau <j@jannau.net>

Author: jannau

drivers/usb/dwc3/core.c

@@ -105,27 +105,6 @@ static int dwc3_get_dr_mode(struct dwc3 *dwc)
 	return 0;
 }
 
-void dwc3_enable_susphy(struct dwc3 *dwc, bool enable)
-{
-	u32 reg;
-
-	reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
-	if (enable && !dwc->dis_u3_susphy_quirk)
-		reg |= DWC3_GUSB3PIPECTL_SUSPHY;
-	else
-		reg &= ~DWC3_GUSB3PIPECTL_SUSPHY;
-
-	dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
-
-	reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
-	if (enable && !dwc->dis_u2_susphy_quirk)
-		reg |= DWC3_GUSB2PHYCFG_SUSPHY;
-	else
-		reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
-
-	dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
-}
-
 void dwc3_set_prtcap(struct dwc3 *dwc, u32 mode)
 {
 	u32 reg;
@@ -639,8 +618,11 @@ static int dwc3_core_ulpi_init(struct dwc3 *dwc)
 
 static int dwc3_ss_phy_setup(struct dwc3 *dwc, int index)
 {
+	unsigned int hw_mode;
 	u32 reg;
 
+	hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0);
+
 	reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(index));
 
 	/*
@@ -650,16 +632,21 @@ static int dwc3_ss_phy_setup(struct dwc3 *dwc, int index)
 	reg &= ~DWC3_GUSB3PIPECTL_UX_EXIT_PX;
 
 	/*
-	 * Above DWC_usb3.0 1.94a, it is recommended to set
-	 * DWC3_GUSB3PIPECTL_SUSPHY to '0' during coreConsultant configuration.
-	 * So default value will be '0' when the core is reset. Application
-	 * needs to set it to '1' after the core initialization is completed.
-	 *
-	 * Similarly for DRD controllers, GUSB3PIPECTL.SUSPENDENABLE must be
-	 * cleared after power-on reset, and it can be set after core
-	 * initialization.
+	 * Above 1.94a, it is recommended to set DWC3_GUSB3PIPECTL_SUSPHY
+	 * to '0' during coreConsultant configuration. So default value
+	 * will be '0' when the core is reset. Application needs to set it
+	 * to '1' after the core initialization is completed.
+	 */
+	if (!DWC3_VER_IS_WITHIN(DWC3, ANY, 194A))
+		reg |= DWC3_GUSB3PIPECTL_SUSPHY;
+
+	/*
+	 * For DRD controllers, GUSB3PIPECTL.SUSPENDENABLE must be cleared after
+	 * power-on reset, and it can be set after core initialization, which is
+	 * after device soft-reset during initialization.
 	 */
-	reg &= ~DWC3_GUSB3PIPECTL_SUSPHY;
+	if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD)
+		reg &= ~DWC3_GUSB3PIPECTL_SUSPHY;
 
 	if (dwc->u2ss_inp3_quirk)
 		reg |= DWC3_GUSB3PIPECTL_U2SSINP3OK;
@@ -685,6 +672,9 @@ static int dwc3_ss_phy_setup(struct dwc3 *dwc, int index)
 	if (dwc->tx_de_emphasis_quirk)
 		reg |= DWC3_GUSB3PIPECTL_TX_DEEPH(dwc->tx_de_emphasis);
 
+	if (dwc->dis_u3_susphy_quirk)
+		reg &= ~DWC3_GUSB3PIPECTL_SUSPHY;
+
 	if (dwc->dis_del_phy_power_chg_quirk)
 		reg &= ~DWC3_GUSB3PIPECTL_DEPOCHANGE;
 
@@ -739,15 +729,24 @@ static int dwc3_hs_phy_setup(struct dwc3 *dwc, int index)
 	}
 
 	/*
-	 * Above DWC_usb3.0 1.94a, it is recommended to set
-	 * DWC3_GUSB2PHYCFG_SUSPHY to '0' during coreConsultant configuration.
-	 * So default value will be '0' when the core is reset. Application
-	 * needs to set it to '1' after the core initialization is completed.
-	 *
-	 * Similarly for DRD controllers, GUSB2PHYCFG.SUSPHY must be cleared
-	 * after power-on reset, and it can be set after core initialization.
+	 * Above 1.94a, it is recommended to set DWC3_GUSB2PHYCFG_SUSPHY to
+	 * '0' during coreConsultant configuration. So default value will
+	 * be '0' when the core is reset. Application needs to set it to
+	 * '1' after the core initialization is completed.
 	 */
-	reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
+	if (!DWC3_VER_IS_WITHIN(DWC3, ANY, 194A))
+		reg |= DWC3_GUSB2PHYCFG_SUSPHY;
+
+	/*
+	 * For DRD controllers, GUSB2PHYCFG.SUSPHY must be cleared after
+	 * power-on reset, and it can be set after core initialization, which is
+	 * after device soft-reset during initialization.
+	 */
+	if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD)
+		reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
+
+	if (dwc->dis_u2_susphy_quirk)
+		reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
 
 	if (dwc->dis_enblslpm_quirk)
 		reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
@@ -1346,6 +1345,21 @@ static int dwc3_core_init(struct dwc3 *dwc)
 	if (ret)
 		goto err_exit_phy;
 
+	if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD &&
+	    !DWC3_VER_IS_WITHIN(DWC3, ANY, 194A)) {
+		if (!dwc->dis_u3_susphy_quirk) {
+			reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
+			reg |= DWC3_GUSB3PIPECTL_SUSPHY;
+			dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
+		}
+
+		if (!dwc->dis_u2_susphy_quirk) {
+			reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
+			reg |= DWC3_GUSB2PHYCFG_SUSPHY;
+			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
+		}
+	}
+
 	dwc3_core_setup_global_control(dwc);
 	dwc3_core_num_eps(dwc);
 

drivers/usb/dwc3/core.h

@@ -1595,7 +1595,6 @@ int dwc3_event_buffers_setup(struct dwc3 *dwc);
 void dwc3_event_buffers_cleanup(struct dwc3 *dwc);
 
 int dwc3_core_soft_reset(struct dwc3 *dwc);
-void dwc3_enable_susphy(struct dwc3 *dwc, bool enable);
 
 #if IS_ENABLED(CONFIG_USB_DWC3_HOST) || IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)
 int dwc3_host_init(struct dwc3 *dwc);

drivers/usb/dwc3/gadget.c

@@ -2922,7 +2922,6 @@ static int __dwc3_gadget_start(struct dwc3 *dwc)
 	dwc3_ep0_out_start(dwc);
 
 	dwc3_gadget_enable_irq(dwc);
-	dwc3_enable_susphy(dwc, true);
 
 	return 0;
 
@@ -4689,7 +4688,6 @@ void dwc3_gadget_exit(struct dwc3 *dwc)
 	if (!dwc->gadget)
 		return;
 
-	dwc3_enable_susphy(dwc, false);
 	usb_del_gadget(dwc->gadget);
 	dwc3_gadget_free_endpoints(dwc);
 	usb_put_gadget(dwc->gadget);

drivers/usb/dwc3/host.c

@@ -10,13 +10,10 @@
 #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		0x4
@@ -60,24 +57,6 @@ static void dwc3_power_off_all_roothub_ports(struct dwc3 *dwc)
 	}
 }
 
-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)
 {
@@ -188,11 +167,6 @@ int dwc3_host_init(struct dwc3 *dwc)
 		}
 	}
 
-	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");
@@ -218,7 +192,6 @@ 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;
 }