diff options
Diffstat (limited to 'drivers/usb/dwc3/io.h')
| -rw-r--r-- | drivers/usb/dwc3/io.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/io.h b/drivers/usb/dwc3/io.h new file mode 100644 index 000000000..70acdf94a --- /dev/null +++ b/drivers/usb/dwc3/io.h @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0 +/** + * io.h - DesignWare USB3 DRD IO Header + * + * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com + * + * Authors: Felipe Balbi <balbi@ti.com>, + * Sebastian Andrzej Siewior <bigeasy@linutronix.de> + */ + +#ifndef __DRIVERS_USB_DWC3_IO_H +#define __DRIVERS_USB_DWC3_IO_H + +#include <linux/io.h> +#include "trace.h" +#include "debug.h" +#include "core.h" + +static inline u32 dwc3_readl(void __iomem *base, u32 offset) +{ + u32 value; + + /* + * We requested the mem region starting from the Globals address + * space, see dwc3_probe in core.c. + * However, the offsets are given starting from xHCI address space. + */ + value = readl(base + offset - DWC3_GLOBALS_REGS_START); + + /* + * When tracing we want to make it easy to find the correct address on + * documentation, so we revert it back to the proper addresses, the + * same way they are described on SNPS documentation + */ + trace_dwc3_readl(base - DWC3_GLOBALS_REGS_START, offset, value); + + return value; +} + +static inline void dwc3_writel(void __iomem *base, u32 offset, u32 value) +{ + /* + * We requested the mem region starting from the Globals address + * space, see dwc3_probe in core.c. + * However, the offsets are given starting from xHCI address space. + */ + writel(value, base + offset - DWC3_GLOBALS_REGS_START); + + /* + * When tracing we want to make it easy to find the correct address on + * documentation, so we revert it back to the proper addresses, the + * same way they are described on SNPS documentation + */ + trace_dwc3_writel(base - DWC3_GLOBALS_REGS_START, offset, value); +} + +#endif /* __DRIVERS_USB_DWC3_IO_H */ |