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usb: dwc3: Add splitdisable quirk for Hisilicon Kirin Soc 

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>
This commit is contained in:
Yu Chen 2020-09-08 09:20:56 +02:00 committed by Felipe Balbi
parent 2a87445af2
commit f580170f13
2 changed files with 32 additions and 0 deletions
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25
drivers/usb/dwc3/core.c
View File

@ -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;
pm_runtime_get_sync(dwc->dev);
@ -169,6 +170,11 @@ 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:
@ -1349,6 +1355,9 @@ 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;
@ -1886,10 +1895,26 @@ 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)
};

7
drivers/usb/dwc3/core.h
View File

@ -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)
@ -1053,6 +1057,7 @@ 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.
*/
@ -1246,6 +1251,8 @@ struct dwc3 {
unsigned dis_metastability_quirk:1;
unsigned dis_split_quirk:1;
u16 imod_interval;
};