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| author | Kever Yang <kever.yang@rock-chips.com> | 2014-08-06 09:01:50 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-08 15:43:28 -0700 |
| commit | c0155b9d5ef29092d39502ec57b0454b2b3c7cc9 (patch) | |
| tree | 6c7ada1655a4c741ca043b94a3afc4022598b53a /drivers/usb/dwc2/core.c | |
| parent | fc1b0e2aa3251c5f90bb6c70358832e4dab9abfd (diff) | |
| download | op-kernel-dev-c0155b9d5ef29092d39502ec57b0454b2b3c7cc9.zip op-kernel-dev-c0155b9d5ef29092d39502ec57b0454b2b3c7cc9.tar.gz | |
usb: dwc2: add 'mode' which based on Kconfig select or dts setting
According to the "dr_mode", the otg controller can work as
device role and host role. Some boards always want to use host mode
and some other boards want to use gadget mode. We use the dts setting
to set dwc2's mode, rather than fixing it to whatever hardware says.
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Tested-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc2/core.c')
| -rw-r--r-- | drivers/usb/dwc2/core.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c index c184ed43..ea0048a 100644 --- a/drivers/usb/dwc2/core.c +++ b/drivers/usb/dwc2/core.c @@ -118,6 +118,7 @@ static int dwc2_core_reset(struct dwc2_hsotg *hsotg) { u32 greset; int count = 0; + u32 gusbcfg; dev_vdbg(hsotg->dev, "%s()\n", __func__); @@ -148,6 +149,23 @@ static int dwc2_core_reset(struct dwc2_hsotg *hsotg) } } while (greset & GRSTCTL_CSFTRST); + if (hsotg->dr_mode == USB_DR_MODE_HOST) { + gusbcfg = readl(hsotg->regs + GUSBCFG); + gusbcfg &= ~GUSBCFG_FORCEDEVMODE; + gusbcfg |= GUSBCFG_FORCEHOSTMODE; + writel(gusbcfg, hsotg->regs + GUSBCFG); + } else if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) { + gusbcfg = readl(hsotg->regs + GUSBCFG); + gusbcfg &= ~GUSBCFG_FORCEHOSTMODE; + gusbcfg |= GUSBCFG_FORCEDEVMODE; + writel(gusbcfg, hsotg->regs + GUSBCFG); + } else if (hsotg->dr_mode == USB_DR_MODE_OTG) { + gusbcfg = readl(hsotg->regs + GUSBCFG); + gusbcfg &= ~GUSBCFG_FORCEHOSTMODE; + gusbcfg &= ~GUSBCFG_FORCEDEVMODE; + writel(gusbcfg, hsotg->regs + GUSBCFG); + } + /* * NOTE: This long sleep is _very_ important, otherwise the core will * not stay in host mode after a connector ID change! |
