From: Yu Chen chenyu56@huawei.com
[ Upstream commit f580170f135af14e287560d94045624d4242d712 ]
SPLIT_BOUNDARY_DISABLE should be set for DesignWare USB3 DRD Core of Hisilicon Kirin Soc when dwc3 core act as host.
[mchehab: dropped a dev_dbg() as only traces are now allowwed on this driver]
Signed-off-by: Yu Chen chenyu56@huawei.com Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Felipe Balbi balbi@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/dwc3/core.c | 25 +++++++++++++++++++++++++ drivers/usb/dwc3/core.h | 7 +++++++ 2 files changed, 32 insertions(+)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 7c5a18f9f66c8..928a85b0d1cdd 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -119,6 +119,7 @@ static void __dwc3_set_mode(struct work_struct *work) struct dwc3 *dwc = work_to_dwc(work); unsigned long flags; int ret; + u32 reg;
if (dwc->dr_mode != USB_DR_MODE_OTG) return; @@ -172,6 +173,11 @@ static void __dwc3_set_mode(struct work_struct *work) otg_set_vbus(dwc->usb2_phy->otg, true); phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST); phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST); + if (dwc->dis_split_quirk) { + reg = dwc3_readl(dwc->regs, DWC3_GUCTL3); + reg |= DWC3_GUCTL3_SPLITDISABLE; + dwc3_writel(dwc->regs, DWC3_GUCTL3, reg); + } } break; case DWC3_GCTL_PRTCAP_DEVICE: @@ -1350,6 +1356,9 @@ static void dwc3_get_properties(struct dwc3 *dwc) dwc->dis_metastability_quirk = device_property_read_bool(dev, "snps,dis_metastability_quirk");
+ dwc->dis_split_quirk = device_property_read_bool(dev, + "snps,dis-split-quirk"); + dwc->lpm_nyet_threshold = lpm_nyet_threshold; dwc->tx_de_emphasis = tx_de_emphasis;
@@ -1867,10 +1876,26 @@ static int dwc3_resume(struct device *dev)
return 0; } + +static void dwc3_complete(struct device *dev) +{ + struct dwc3 *dwc = dev_get_drvdata(dev); + u32 reg; + + if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST && + dwc->dis_split_quirk) { + reg = dwc3_readl(dwc->regs, DWC3_GUCTL3); + reg |= DWC3_GUCTL3_SPLITDISABLE; + dwc3_writel(dwc->regs, DWC3_GUCTL3, reg); + } +} +#else +#define dwc3_complete NULL #endif /* CONFIG_PM_SLEEP */
static const struct dev_pm_ops dwc3_dev_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend, dwc3_resume) + .complete = dwc3_complete, SET_RUNTIME_PM_OPS(dwc3_runtime_suspend, dwc3_runtime_resume, dwc3_runtime_idle) }; diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 013f42a2b5dcc..af5533b097133 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -138,6 +138,7 @@ #define DWC3_GEVNTCOUNT(n) (0xc40c + ((n) * 0x10))
#define DWC3_GHWPARAMS8 0xc600 +#define DWC3_GUCTL3 0xc60c #define DWC3_GFLADJ 0xc630
/* Device Registers */ @@ -380,6 +381,9 @@ /* Global User Control Register 2 */ #define DWC3_GUCTL2_RST_ACTBITLATER BIT(14)
+/* Global User Control Register 3 */ +#define DWC3_GUCTL3_SPLITDISABLE BIT(14) + /* Device Configuration Register */ #define DWC3_DCFG_DEVADDR(addr) ((addr) << 3) #define DWC3_DCFG_DEVADDR_MASK DWC3_DCFG_DEVADDR(0x7f) @@ -1052,6 +1056,7 @@ struct dwc3_scratchpad_array { * 2 - No de-emphasis * 3 - Reserved * @dis_metastability_quirk: set to disable metastability quirk. + * @dis_split_quirk: set to disable split boundary. * @imod_interval: set the interrupt moderation interval in 250ns * increments or 0 to disable. */ @@ -1245,6 +1250,8 @@ struct dwc3 {
unsigned dis_metastability_quirk:1;
+ unsigned dis_split_quirk:1; + u16 imod_interval; };