projects / deliverable / linux.git / blame
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1 | /** |
| 2 | * io.h - DesignWare USB3 DRD IO Header | |
| 3 | * | |
| 4 | * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com | |
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5 | * |
| 6 | * Authors: Felipe Balbi <balbi@ti.com>, | |
| 7 | * Sebastian Andrzej Siewior <bigeasy@linutronix.de> | |
| 8 | * | |
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9 | * This program is free software: you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 of | |
| 11 | * the License as published by the Free Software Foundation. | |
| 72246da4 | 12 | * |
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13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 16 | * GNU General Public License for more details. | |
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17 | */ |
| 18 | ||
| 19 | #ifndef __DRIVERS_USB_DWC3_IO_H | |
| 20 | #define __DRIVERS_USB_DWC3_IO_H | |
| 21 | ||
| 25b8ff68 | 22 | #include <linux/io.h> |
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23 | #include "trace.h" |
| 24 | #include "debug.h" | |
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25 | #include "core.h" |
| 26 | ||
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27 | static inline u32 dwc3_readl(void __iomem *base, u32 offset) |
| 28 | { | |
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29 | u32 offs = offset - DWC3_GLOBALS_REGS_START; |
| 30 | u32 value; | |
| 31 | ||
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32 | /* |
| 33 | * We requested the mem region starting from the Globals address | |
| 34 | * space, see dwc3_probe in core.c. | |
| 35 | * However, the offsets are given starting from xHCI address space. | |
| 36 | */ | |
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37 | value = readl(base + offs); |
| 38 | ||
| 39 | /* | |
| 40 | * When tracing we want to make it easy to find the correct address on | |
| 41 | * documentation, so we revert it back to the proper addresses, the | |
| 42 | * same way they are described on SNPS documentation | |
| 43 | */ | |
| 44 | dwc3_trace(trace_dwc3_readl, "addr %p value %08x", | |
| 45 | base - DWC3_GLOBALS_REGS_START + offset, value); | |
| 46 | ||
| 47 | return value; | |
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48 | } |
| 49 | ||
| 50 | static inline void dwc3_writel(void __iomem *base, u32 offset, u32 value) | |
| 51 | { | |
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52 | u32 offs = offset - DWC3_GLOBALS_REGS_START; |
| 53 | ||
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54 | /* |
| 55 | * We requested the mem region starting from the Globals address | |
| 56 | * space, see dwc3_probe in core.c. | |
| 57 | * However, the offsets are given starting from xHCI address space. | |
| 58 | */ | |
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59 | writel(value, base + offs); |
| 60 | ||
| 61 | /* | |
| 62 | * When tracing we want to make it easy to find the correct address on | |
| 63 | * documentation, so we revert it back to the proper addresses, the | |
| 64 | * same way they are described on SNPS documentation | |
| 65 | */ | |
| 66 | dwc3_trace(trace_dwc3_writel, "addr %p value %08x", | |
| 67 | base - DWC3_GLOBALS_REGS_START + offset, value); | |
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68 | } |
| 69 | ||
| 70 | #endif /* __DRIVERS_USB_DWC3_IO_H */ |