mirror of
https://github.com/proski/madwifi
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a992820b57
Use a new is_reg_le macro to determine whether the register points to a little-endian area. git-svn-id: http://madwifi-project.org/svn/madwifi/trunk@2933 0192ed92-7a03-0410-a25b-9323aeb14dbd
266 lines
9.0 KiB
C
266 lines
9.0 KiB
C
/*-
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* Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
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* redistribution must be conditioned upon including a substantially
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* similar Disclaimer requirement for further binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGES.
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*
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* $Id$
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*/
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#ifndef _ATH_AH_OS_H_
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#define _ATH_AH_OS_H_
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/*
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* Atheros Hardware Access Layer (HAL) OS Dependent Definitions.
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*/
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/*
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MadWifi safe register operations:
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When hacking on registers directly, we need to use the macros below to
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avoid concurrent PCI access and abort mode errors.
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* ath_reg_read
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* ATH_REG_WRITE
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HAL-ONLY register operations:
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* _OS_REG_READ
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* _OS_REG_WRITE
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* OS_REG_READ
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* OS_REG_WRITE
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* ath_hal_reg_read.
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* ath_hal_reg_write
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When compiled in HAL:
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* We don't require locking overhead and function call except for
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debugging.
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* All HAL operations are executed in the context of a MadWifi wrapper
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call that holds the HAL lock.
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* Normally HAL is built with the non-modified version of this file, so
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it doesn't have our funny macros anyway.
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When compiled in MadWifi:
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* The HAL wrapper API takes the HAL lock before invoking the HAL.
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* HAL access is already protected, and MadWifi must NOT access the
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functions listed above.
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*/
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/*
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* When building the HAL proper, we use no GPL-licensed include files and must
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* define Linux types ourselves. Please note that the definitions below don't
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* exactly match those in <linux/types.h>
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*/
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#ifndef _LINUX_TYPES_H
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/* NB: ARM defaults to unsigned, so be explicit */
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typedef signed char int8_t;
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typedef short int16_t;
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typedef int int32_t;
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typedef long long int64_t;
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typedef unsigned char u_int8_t;
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typedef unsigned short u_int16_t;
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typedef unsigned int u_int32_t;
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typedef unsigned long long u_int64_t;
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typedef unsigned int size_t;
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typedef unsigned int u_int;
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typedef void* va_list;
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#endif /* !_LINUX_TYPES_H */
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/*
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* Linux/BSD gcc compatibility shims.
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*/
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#define __printflike(_a,_b) \
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__attribute__((__format__ (__printf__, _a, _b)))
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#define __va_list va_list
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#define OS_INLINE __inline
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extern int ath_hal_dma_beacon_response_time;
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extern int ath_hal_sw_beacon_response_time;
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extern int ath_hal_additional_swba_backoff;
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void __ahdecl ath_hal_vprintf(struct ath_hal *ah, const char *fmt, va_list ap);
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void __ahdecl ath_hal_printf(struct ath_hal *ah, const char *fmt, ...);
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const char *__ahdecl ath_hal_ether_sprintf(const u_int8_t *mac);
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int __ahdecl ath_hal_memcmp(const void *a, const void *b, size_t n);
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void *__ahdecl ath_hal_malloc(size_t size);
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void __ahdecl ath_hal_free(void *p);
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/* Delay n microseconds. */
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extern void __ahdecl ath_hal_delay(int);
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#define OS_DELAY(_n) ath_hal_delay(_n)
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#define OS_MEMZERO(_a, _n) ath_hal_memzero((_a), (_n))
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extern void __ahdecl ath_hal_memzero(void *, size_t);
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#define OS_MEMCPY(_d, _s, _n) ath_hal_memcpy(_d,_s,_n)
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extern void *__ahdecl ath_hal_memcpy(void *, const void *, size_t);
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#ifndef abs
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#define abs(_a) __builtin_abs(_a)
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#endif
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#ifndef labs
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#define labs(_a) __builtin_labs(_a)
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#endif
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struct ath_hal;
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extern u_int32_t __ahdecl ath_hal_getuptime(struct ath_hal *);
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#define OS_GETUPTIME(_ah) ath_hal_getuptime(_ah)
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/* Byte order/swapping support. */
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#define AH_LITTLE_ENDIAN 1234
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#define AH_BIG_ENDIAN 4321
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#ifndef AH_BYTE_ORDER
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/*
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* When the .inc file is not available (e.g. when building in the kernel source
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* tree), look for some other way to determine the host byte order.
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*/
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#ifdef __LITTLE_ENDIAN
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#define AH_BYTE_ORDER AH_LITTLE_ENDIAN
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#endif
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#ifdef __BIG_ENDIAN
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#define AH_BYTE_ORDER AH_BIG_ENDIAN
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#endif
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#ifndef AH_BYTE_ORDER
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#error "Do not know host byte order"
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#endif
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#endif /* AH_BYTE_ORDER */
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/*
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* Some big-endian architectures don't set CONFIG_GENERIC_IOMAP, but fail to
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* implement iowrite32be and ioread32be. Provide compatibility macros when
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* it's needed.
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*
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* As of Linux 2.6.24, only MIPS, PARISC and PowerPC implement iowrite32be and
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* ioread32be as functions.
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*
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* The downside or the replacement macros it that we may be byte-swapping data
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* for the second time, so the native implementations should be preferred.
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*/
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#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,12)) && \
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!defined(CONFIG_GENERIC_IOMAP) && (AH_BYTE_ORDER == AH_BIG_ENDIAN) && \
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!defined(__mips__) && !defined(__hppa__) && !defined(__powerpc__)
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# ifndef iowrite32be
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# define iowrite32be(_val, _addr) iowrite32(swab32((_val)), (_addr))
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# endif
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# ifndef ioread32be
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# define ioread32be(_addr) swab32(ioread32((_addr)))
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# endif
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#endif
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/*
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* The register accesses are done using target-specific functions when
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* debugging is enabled (AH_DEBUG) or it's explicitly requested for the target.
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*
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* The hardware registers use little-endian byte order natively. Big-endian
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* systems are configured by HAL to enable hardware byte-swap of register reads
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* and writes at reset. This avoid the need to byte-swap the data in software.
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* However, the registers in a certain area from 0x4000 to 0x4fff (PCI clock
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* domain registers) are not byte swapped!
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*
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* Since Linux I/O primitives default to little-endian operations, we only
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* need to suppress byte-swapping on big-endian systems outside the area used
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* by the PCI clock domain registers.
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*/
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#if (AH_BYTE_ORDER == AH_BIG_ENDIAN)
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#define is_reg_le(__reg) ((0x4000 <= (__reg) && (__reg) < 0x5000))
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#else
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#define is_reg_le(__reg) 1
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#endif
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,12)
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#define _OS_REG_WRITE(_ah, _reg, _val) do { \
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is_reg_le(_reg) ? \
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iowrite32((_val), (_ah)->ah_sh + (_reg)) : \
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iowrite32be((_val), (_ah)->ah_sh + (_reg)); \
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} while (0)
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#define _OS_REG_READ(_ah, _reg) \
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(is_reg_le(_reg) ? \
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ioread32((_ah)->ah_sh + (_reg)) : \
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ioread32be((_ah)->ah_sh + (_reg)))
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#else
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#define _OS_REG_WRITE(_ah, _reg, _val) do { \
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writel(is_reg_le(_reg) ? \
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(_val) : cpu_to_le32(_val), \
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(_ah)->ah_sh + (_reg)); \
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} while (0)
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#define _OS_REG_READ(_ah, _reg) \
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(is_reg_le(_reg) ? \
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readl((_ah)->ah_sh + (_reg)) : \
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cpu_to_le32(readl((_ah)->ah_sh + (_reg))))
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#endif /* KERNEL_VERSION(2,6,12) */
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/*
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* The functions in this section are not intended to be invoked by MadWifi
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* driver code, but by the HAL. They are NOT safe to call directly when the
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* sc->sc_hal_lock is not held. Use ath_reg_read and ATH_REG_WRITE instead!
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*/
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#if defined(AH_DEBUG) || defined(AH_REGOPS_FUNC) || defined(AH_DEBUG_ALQ)
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#define OS_REG_WRITE(_ah, _reg, _val) ath_hal_reg_write(_ah, _reg, _val)
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#define OS_REG_READ(_ah, _reg) ath_hal_reg_read(_ah, _reg)
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extern void __ahdecl ath_hal_reg_write(struct ath_hal *ah, u_int reg,
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u_int32_t val);
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extern u_int32_t __ahdecl ath_hal_reg_read(struct ath_hal *ah, u_int reg);
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#else
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#define OS_REG_WRITE(_ah, _reg, _val) _OS_REG_WRITE(_ah, _reg, _val)
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#define OS_REG_READ(_ah, _reg) _OS_REG_READ(_ah, _reg)
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#endif /* AH_DEBUG || AH_REGFUNC || AH_DEBUG_ALQ */
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extern char *ath_hal_func;
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static inline void ath_hal_set_function(const char *name)
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{
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#ifdef AH_DEBUG
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ath_hal_func = (char *)name;
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#endif
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}
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#ifdef AH_DEBUG_ALQ
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extern void __ahdecl OS_MARK(struct ath_hal *, u_int id, u_int32_t value);
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#else
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#define OS_MARK(_ah, _id, _v)
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#endif
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/*
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* Linux-specific attach/detach methods needed for module reference counting.
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*
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* NB: These are intentionally not marked __ahdecl since they are
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* compiled with the default calling convention and are not called
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* from within the HAL.
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*/
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extern struct ath_hal *_ath_hal_attach(u_int16_t devid, HAL_SOFTC,
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HAL_BUS_TAG, HAL_BUS_HANDLE,
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HAL_STATUS *);
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extern void _ath_hal_detach(struct ath_hal *);
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#endif /* _ATH_AH_OSDEP_H_ */
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