diff options
author | Dave Airlie <airlied@redhat.com> | 2016-07-02 15:56:01 +1000 |
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committer | Dave Airlie <airlied@redhat.com> | 2016-07-02 15:56:01 +1000 |
commit | 542d972221e024681b502033154f917c1455469f (patch) | |
tree | 1c7c1be768f6e1b496a3edad6b105804a8d05c57 /drivers/usb/dwc2/core.h | |
parent | 583fa4e02775b26d76771d4e1ddc6f10ba005ef2 (diff) | |
parent | 4c2e07c6a29e0129e975727b9f57eede813eea85 (diff) |
Back-merge tag 'v4.7-rc5' into drm-next
Linux 4.7-rc5
The fsl-dcu pull needs -rc3 so go to -rc5 for now.
Diffstat (limited to 'drivers/usb/dwc2/core.h')
-rw-r--r-- | drivers/usb/dwc2/core.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index 3c58d633ce80..dec0b21fc626 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -64,6 +64,17 @@ DWC2_TRACE_SCHEDULER_VB(pr_fmt("%s: SCH: " fmt), \ dev_name(hsotg->dev), ##__VA_ARGS__) +#ifdef CONFIG_MIPS +/* + * There are some MIPS machines that can run in either big-endian + * or little-endian mode and that use the dwc2 register without + * a byteswap in both ways. + * Unlike other architectures, MIPS apparently does not require a + * barrier before the __raw_writel() to synchronize with DMA but does + * require the barrier after the __raw_writel() to serialize a set of + * writes. This set of operations was added specifically for MIPS and + * should only be used there. + */ static inline u32 dwc2_readl(const void __iomem *addr) { u32 value = __raw_readl(addr); @@ -90,6 +101,22 @@ static inline void dwc2_writel(u32 value, void __iomem *addr) pr_info("INFO:: wrote %08x to %p\n", value, addr); #endif } +#else +/* Normal architectures just use readl/write */ +static inline u32 dwc2_readl(const void __iomem *addr) +{ + return readl(addr); +} + +static inline void dwc2_writel(u32 value, void __iomem *addr) +{ + writel(value, addr); + +#ifdef DWC2_LOG_WRITES + pr_info("info:: wrote %08x to %p\n", value, addr); +#endif +} +#endif /* Maximum number of Endpoints/HostChannels */ #define MAX_EPS_CHANNELS 16 |