| Message ID | 20240420044901.884098-3-quic_kriskura@quicinc.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | Add multiport support for DWC3 controllers | expand |
On Sat, Apr 20, 2024 at 10:18:54AM +0530, Krishna Kurapati wrote: > All DWC3 Multi Port controllers that exist today only support host mode. > Temporarily map XHCI address space for host-only controllers and parse > XHCI Extended Capabilities registers to read number of usb2 ports and > usb3 ports present on multiport controller. Each USB Port is at least HS > capable. > > The port info for usb2 and usb3 phy are identified as num_usb2_ports > and num_usb3_ports and these are used as iterators for phy operations > and for modifying GUSB2PHYCFG/ GUSB3PIPECTL registers accordingly. > > Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com> > Reviewed-by: Bjorn Andersson <quic_bjorande@quicinc.com> Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
On Sat, Apr 20, 2024, Krishna Kurapati wrote: > All DWC3 Multi Port controllers that exist today only support host mode. > Temporarily map XHCI address space for host-only controllers and parse > XHCI Extended Capabilities registers to read number of usb2 ports and > usb3 ports present on multiport controller. Each USB Port is at least HS > capable. > > The port info for usb2 and usb3 phy are identified as num_usb2_ports > and num_usb3_ports and these are used as iterators for phy operations > and for modifying GUSB2PHYCFG/ GUSB3PIPECTL registers accordingly. > > Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com> > Reviewed-by: Bjorn Andersson <quic_bjorande@quicinc.com> > --- > drivers/usb/dwc3/core.c | 61 +++++++++++++++++++++++++++++++++++++++++ > drivers/usb/dwc3/core.h | 5 ++++ > 2 files changed, 66 insertions(+) > > diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c > index 637194af506f..38fcf530332f 100644 > --- a/drivers/usb/dwc3/core.c > +++ b/drivers/usb/dwc3/core.c > @@ -39,6 +39,7 @@ > #include "io.h" > > #include "debug.h" > +#include "../host/xhci-ext-caps.h" > > #define DWC3_DEFAULT_AUTOSUSPEND_DELAY 5000 /* ms */ > > @@ -1884,10 +1885,56 @@ static int dwc3_get_clocks(struct dwc3 *dwc) > return 0; > } > > +static int dwc3_get_num_ports(struct dwc3 *dwc) > +{ > + void __iomem *base; > + u8 major_revision; > + u32 offset; > + u32 val; > + > + /* > + * Remap xHCI address space to access XHCI ext cap regs since it is > + * needed to get information on number of ports present. > + */ > + base = ioremap(dwc->xhci_resources[0].start, > + resource_size(&dwc->xhci_resources[0])); > + if (!base) > + return -ENOMEM; > + > + offset = 0; > + do { > + offset = xhci_find_next_ext_cap(base, offset, > + XHCI_EXT_CAPS_PROTOCOL); > + if (!offset) > + break; > + > + val = readl(base + offset); > + major_revision = XHCI_EXT_PORT_MAJOR(val); > + > + val = readl(base + offset + 0x08); > + if (major_revision == 0x03) { > + dwc->num_usb3_ports += XHCI_EXT_PORT_COUNT(val); > + } else if (major_revision <= 0x02) { > + dwc->num_usb2_ports += XHCI_EXT_PORT_COUNT(val); > + } else { > + dev_warn(dwc->dev, "unrecognized port major revision %d\n", > + major_revision); > + } > + } while (1); > + > + dev_dbg(dwc->dev, "hs-ports: %u ss-ports: %u\n", > + dwc->num_usb2_ports, dwc->num_usb3_ports); > + > + iounmap(base); > + > + return 0; > +} > + > static int dwc3_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > struct resource *res, dwc_res; > + unsigned int hw_mode; > void __iomem *regs; > struct dwc3 *dwc; > int ret; > @@ -1971,6 +2018,20 @@ static int dwc3_probe(struct platform_device *pdev) > goto err_disable_clks; > } > > + /* > + * Currently only DWC3 controllers that are host-only capable > + * can have more than one port. > + */ > + hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0); > + if (hw_mode == DWC3_GHWPARAMS0_MODE_HOST) { > + ret = dwc3_get_num_ports(dwc); > + if (ret) > + goto err_disable_clks; > + } else { > + dwc->num_usb2_ports = 1; > + dwc->num_usb3_ports = 1; > + } > + > spin_lock_init(&dwc->lock); > mutex_init(&dwc->mutex); > > diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h > index 7e80dd3d466b..341e4c73cb2e 100644 > --- a/drivers/usb/dwc3/core.h > +++ b/drivers/usb/dwc3/core.h > @@ -1039,6 +1039,8 @@ struct dwc3_scratchpad_array { > * @usb3_phy: pointer to USB3 PHY > * @usb2_generic_phy: pointer to USB2 PHY > * @usb3_generic_phy: pointer to USB3 PHY > + * @num_usb2_ports: number of USB2 ports > + * @num_usb3_ports: number of USB3 ports > * @phys_ready: flag to indicate that PHYs are ready > * @ulpi: pointer to ulpi interface > * @ulpi_ready: flag to indicate that ULPI is initialized > @@ -1187,6 +1189,9 @@ struct dwc3 { > struct phy *usb2_generic_phy; > struct phy *usb3_generic_phy; > > + u8 num_usb2_ports; > + u8 num_usb3_ports; > + > bool phys_ready; > > struct ulpi *ulpi; > -- > 2.34.1 > Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com> Thanks, Thinh
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 637194af506f..38fcf530332f 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -39,6 +39,7 @@ #include "io.h" #include "debug.h" +#include "../host/xhci-ext-caps.h" #define DWC3_DEFAULT_AUTOSUSPEND_DELAY 5000 /* ms */ @@ -1884,10 +1885,56 @@ static int dwc3_get_clocks(struct dwc3 *dwc) return 0; } +static int dwc3_get_num_ports(struct dwc3 *dwc) +{ + void __iomem *base; + u8 major_revision; + u32 offset; + u32 val; + + /* + * Remap xHCI address space to access XHCI ext cap regs since it is + * needed to get information on number of ports present. + */ + base = ioremap(dwc->xhci_resources[0].start, + resource_size(&dwc->xhci_resources[0])); + if (!base) + return -ENOMEM; + + offset = 0; + do { + offset = xhci_find_next_ext_cap(base, offset, + XHCI_EXT_CAPS_PROTOCOL); + if (!offset) + break; + + val = readl(base + offset); + major_revision = XHCI_EXT_PORT_MAJOR(val); + + val = readl(base + offset + 0x08); + if (major_revision == 0x03) { + dwc->num_usb3_ports += XHCI_EXT_PORT_COUNT(val); + } else if (major_revision <= 0x02) { + dwc->num_usb2_ports += XHCI_EXT_PORT_COUNT(val); + } else { + dev_warn(dwc->dev, "unrecognized port major revision %d\n", + major_revision); + } + } while (1); + + dev_dbg(dwc->dev, "hs-ports: %u ss-ports: %u\n", + dwc->num_usb2_ports, dwc->num_usb3_ports); + + iounmap(base); + + return 0; +} + static int dwc3_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct resource *res, dwc_res; + unsigned int hw_mode; void __iomem *regs; struct dwc3 *dwc; int ret; @@ -1971,6 +2018,20 @@ static int dwc3_probe(struct platform_device *pdev) goto err_disable_clks; } + /* + * Currently only DWC3 controllers that are host-only capable + * can have more than one port. + */ + hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0); + if (hw_mode == DWC3_GHWPARAMS0_MODE_HOST) { + ret = dwc3_get_num_ports(dwc); + if (ret) + goto err_disable_clks; + } else { + dwc->num_usb2_ports = 1; + dwc->num_usb3_ports = 1; + } + spin_lock_init(&dwc->lock); mutex_init(&dwc->mutex); diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 7e80dd3d466b..341e4c73cb2e 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -1039,6 +1039,8 @@ struct dwc3_scratchpad_array { * @usb3_phy: pointer to USB3 PHY * @usb2_generic_phy: pointer to USB2 PHY * @usb3_generic_phy: pointer to USB3 PHY + * @num_usb2_ports: number of USB2 ports + * @num_usb3_ports: number of USB3 ports * @phys_ready: flag to indicate that PHYs are ready * @ulpi: pointer to ulpi interface * @ulpi_ready: flag to indicate that ULPI is initialized @@ -1187,6 +1189,9 @@ struct dwc3 { struct phy *usb2_generic_phy; struct phy *usb3_generic_phy; + u8 num_usb2_ports; + u8 num_usb3_ports; + bool phys_ready; struct ulpi *ulpi;