[PATCH v3 2/5] usb: dwc3: host: Add suspend_quirk for dwc3 host

Sandeep Maheswaram
2020-09-29T10:48:16Z

Adding suspend quirk function for dwc3 host which will be called
during xhci suspend.
Setting hs_phy_flags, ss_phy_flags and phy mode during host suspend.

Signed-off-by: Sandeep Maheswaram <sanm@codeaurora.org>
---
drivers/usb/dwc3/host.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 49 insertions(+)

diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
index e195176..7f316fa 100644
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -11,6 +11,13 @@
#include <linux/platform_device.h>

#include "core.h"
+#include "../host/xhci.h"
+#include "../host/xhci-plat.h"
+int xhci_dwc3_suspend_quirk(struct usb_hcd *hcd);
+
+static const struct xhci_plat_priv xhci_plat_dwc3_xhci = {
+ .suspend_quirk = xhci_dwc3_suspend_quirk,
+};

static int dwc3_host_get_irq(struct dwc3 *dwc)
{
@@ -115,6 +122,13 @@ int dwc3_host_init(struct dwc3 *dwc)
}
}

+ ret = platform_device_add_data(xhci, &xhci_plat_dwc3_xhci,
+ sizeof(struct xhci_plat_priv));
+ if (ret) {
+ dev_err(dwc->dev, "failed to add data to xHCI\n");
+ goto err;
+ }
+
ret = platform_device_add(xhci);
if (ret) {
dev_err(dwc->dev, "failed to register xHCI device\n");
@@ -127,6 +141,41 @@ int dwc3_host_init(struct dwc3 *dwc)
return ret;
}

+static void dwc3_set_phy_speed_flags(struct usb_hcd *hcd)
+{
+
+ int i, num_ports;
+ u32 reg;
+ struct device *dev = hcd->self.controller;
+ struct dwc3 *dwc = dev_get_drvdata(dev->parent);
+ struct xhci_hcd *xhci_hcd = hcd_to_xhci(hcd);
+
+ dwc->hs_phy_flags = 0;
+
+ reg = readl(&xhci_hcd->cap_regs->hcs_params1);
+
+ num_ports = HCS_MAX_PORTS(reg);
+ for (i = 0; i < num_ports; i++) {
+ reg = readl(&xhci_hcd->op_regs->port_status_base + i * 0x04);
+ if (reg & PORT_PE) {
+ if (DEV_HIGHSPEED(reg) || DEV_FULLSPEED(reg))
+ dwc->hs_phy_flags |= PHY_MODE_USB_HOST_HS;
+ else if (DEV_LOWSPEED(reg))
+ dwc->hs_phy_flags |= PHY_MODE_USB_HOST_LS;
+ if (DEV_SUPERSPEED(reg))
+ dwc->ss_phy_flags |= PHY_MODE_USB_HOST_SS;
+ }
+ }
+ phy_set_mode(dwc->usb2_generic_phy, dwc->hs_phy_flags);
+ phy_set_mode(dwc->usb3_generic_phy, dwc->ss_phy_flags);
+}
+
+int xhci_dwc3_suspend_quirk(struct usb_hcd *hcd)
+{
+ dwc3_set_phy_speed_flags(hcd);
+ return 0;
+}
+
void dwc3_host_exit(struct dwc3 *dwc)
{
platform_device_unregister(dwc->xhci);
--
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