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Openwrt/package/madwifi/patches/127-regaccess.patch

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Index: madwifi-dfs-r2996/ath_hal/ah_os.h
===================================================================
--- madwifi-dfs-r2996.orig/ath_hal/ah_os.h 2007-12-01 19:36:04.943396719 +0100
+++ madwifi-dfs-r2996/ath_hal/ah_os.h 2007-12-01 19:37:06.182886560 +0100
@@ -33,7 +33,7 @@
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGES.
*
- * $Id: ah_os.h 2727 2007-10-05 17:42:53Z mtaylor $
+ * $Id: ah_os.h 2933 2007-11-23 09:38:18Z proski $
*/
#ifndef _ATH_AH_OS_H_
#define _ATH_AH_OS_H_
@@ -42,16 +42,16 @@
* Atheros Hardware Access Layer (HAL) OS Dependent Definitions.
*/
-/*
-MadWifi safe register operations:
+/*
+ MadWifi safe register operations:
- When hacking on registers directly we need to use the macros
- below, to avoid concurrent PCI access and abort mode errors.
+ When hacking on registers directly, we need to use the macros below to
+ avoid concurrent PCI access and abort mode errors.
* ath_reg_read
* ATH_REG_WRITE
-HAL-ONLY register operations:
+ HAL-ONLY register operations:
* _OS_REG_READ
* _OS_REG_WRITE
@@ -60,26 +60,27 @@
* ath_hal_reg_read.
* ath_hal_reg_write
- When compiled in HAL:
- * We do not require locking overhead and function call unless user is debugging.
- * All HAL operations are executed in the context of a MadWifi wrapper call which holds
- the HAL lock.
- * Normally HAL is build with the non-modified version of this file so it doesnt have our
- funny macros anyway.
-
- When compiled in MadWifi:
- * The HAL wrapper API takes the HAL lock before invoking the HAL.
- * HAL access is already protected, and MadWifi must NOT access the functions listed above.
-
+ When compiled in HAL:
+ * We don't require locking overhead and function call except for
+ debugging.
+ * All HAL operations are executed in the context of a MadWifi wrapper
+ call that holds the HAL lock.
+ * Normally HAL is built with the non-modified version of this file, so
+ it doesn't have our funny macros anyway.
+
+ When compiled in MadWifi:
+ * The HAL wrapper API takes the HAL lock before invoking the HAL.
+ * HAL access is already protected, and MadWifi must NOT access the
+ functions listed above.
*/
/*
- * When building the HAL proper we use no GPL-contaminated include
- * files and must define these types ourself. Beware of these being
- * mismatched against the contents of <linux/types.h>
+ * When building the HAL proper, we use no GPL-licensed include files and must
+ * define Linux types ourselves. Please note that the definitions below don't
+ * exactly match those in <linux/types.h>
*/
#ifndef _LINUX_TYPES_H
-/* NB: arm defaults to unsigned so be explicit */
+/* NB: ARM defaults to unsigned, so be explicit */
typedef signed char int8_t;
typedef short int16_t;
typedef int int32_t;
@@ -93,36 +94,33 @@
typedef unsigned int size_t;
typedef unsigned int u_int;
typedef void* va_list;
-#endif
+#endif /* !_LINUX_TYPES_H */
/*
* Linux/BSD gcc compatibility shims.
*/
-#define __printflike(_a,_b) \
- __attribute__ ((__format__ (__printf__, _a, _b)))
-#define __va_list va_list
+#define __va_list va_list
#define OS_INLINE __inline
extern int ath_hal_dma_beacon_response_time;
extern int ath_hal_sw_beacon_response_time;
extern int ath_hal_additional_swba_backoff;
-void __ahdecl ath_hal_vprintf(struct ath_hal *ah, const char* fmt,
- va_list ap);
-void __ahdecl ath_hal_printf(struct ath_hal *ah, const char* fmt, ...);
-const char* __ahdecl ath_hal_ether_sprintf(const u_int8_t *mac);
+void __ahdecl ath_hal_vprintf(struct ath_hal *ah, const char *fmt, va_list ap);
+void __ahdecl ath_hal_printf(struct ath_hal *ah, const char *fmt, ...);
+const char *__ahdecl ath_hal_ether_sprintf(const u_int8_t *mac);
int __ahdecl ath_hal_memcmp(const void *a, const void *b, size_t n);
-void * __ahdecl ath_hal_malloc(size_t size);
-void __ahdecl ath_hal_free(void* p);
+void *__ahdecl ath_hal_malloc(size_t size);
+void __ahdecl ath_hal_free(void *p);
/* Delay n microseconds. */
-extern void __ahdecl ath_hal_delay(int);
+extern void __ahdecl ath_hal_delay(int);
#define OS_DELAY(_n) ath_hal_delay(_n)
#define OS_MEMZERO(_a, _n) ath_hal_memzero((_a), (_n))
extern void __ahdecl ath_hal_memzero(void *, size_t);
#define OS_MEMCPY(_d, _s, _n) ath_hal_memcpy(_d,_s,_n)
-extern void * __ahdecl ath_hal_memcpy(void *, const void *, size_t);
+extern void *__ahdecl ath_hal_memcpy(void *, const void *, size_t);
#ifndef abs
#define abs(_a) __builtin_abs(_a)
@@ -133,7 +131,7 @@
#endif
struct ath_hal;
-extern u_int32_t __ahdecl ath_hal_getuptime(struct ath_hal *);
+extern u_int32_t __ahdecl ath_hal_getuptime(struct ath_hal *);
#define OS_GETUPTIME(_ah) ath_hal_getuptime(_ah)
/* Byte order/swapping support. */
@@ -142,9 +140,8 @@
#ifndef AH_BYTE_ORDER
/*
- * When the .inc file is not available (e.g. when building
- * in a kernel source tree); look for some other way to
- * setup the host byte order.
+ * When the .inc file is not available (e.g. when building in the kernel source
+ * tree), look for some other way to determine the host byte order.
*/
#ifdef __LITTLE_ENDIAN
#define AH_BYTE_ORDER AH_LITTLE_ENDIAN
@@ -155,93 +152,98 @@
#ifndef AH_BYTE_ORDER
#error "Do not know host byte order"
#endif
-#endif /* AH_BYTE_ORDER */
+#endif /* AH_BYTE_ORDER */
/*
- * Note that register accesses are done using target-specific
- * functions when debugging is enabled (AH_DEBUG) or we are
- * explicitly configured this way.
- *
- * The hardware registers are native little-endian byte order.
- * Big-endian hosts are handled by enabling hardware byte-swap
- * of register reads and writes at reset. But the PCI clock
- * domain registers are not byte swapped! Thus, on big-endian
- * platforms we have to byte-swap thoese registers specifically.
- * Most of this code is collapsed at compile time because the
- * register values are constants.
- *
- * Presumably when talking about hardware byte-swapping, the above
- * text is referring to the Atheros chipset, as the registers
- * referred to are in the PCI memory address space, and these are
- * never byte-swapped by PCI chipsets or bridges, but always
- * written directly (i.e. the format defined by the manufacturer).
+ * Some big-endian architectures don't set CONFIG_GENERIC_IOMAP, but fail to
+ * implement iowrite32be and ioread32be. Provide compatibility macros when
+ * it's needed.
+ *
+ * As of Linux 2.6.24, only MIPS, PARISC and PowerPC implement iowrite32be and
+ * ioread32be as functions.
+ *
+ * The downside or the replacement macros it that we may be byte-swapping data
+ * for the second time, so the native implementations should be preferred.
*/
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,12)) && \
+ !defined(CONFIG_GENERIC_IOMAP) && (AH_BYTE_ORDER == AH_BIG_ENDIAN) && \
+ !defined(__mips__) && !defined(__hppa__) && !defined(__powerpc__)
+# ifndef iowrite32be
+# define iowrite32be(_val, _addr) iowrite32(swab32((_val)), (_addr))
+# endif
+# ifndef ioread32be
+# define ioread32be(_addr) swab32(ioread32((_addr)))
+# endif
+#endif
+
+/*
+ * The register accesses are done using target-specific functions when
+ * debugging is enabled (AH_DEBUG) or it's explicitly requested for the target.
+ *
+ * The hardware registers use little-endian byte order natively. Big-endian
+ * systems are configured by HAL to enable hardware byte-swap of register reads
+ * and writes at reset. This avoid the need to byte-swap the data in software.
+ * However, the registers in a certain area from 0x4000 to 0x4fff (PCI clock
+ * domain registers) are not byte swapped!
+ *
+ * Since Linux I/O primitives default to little-endian operations, we only
+ * need to suppress byte-swapping on big-endian systems outside the area used
+ * by the PCI clock domain registers.
+ */
+#if (AH_BYTE_ORDER == AH_BIG_ENDIAN)
+#define is_reg_le(__reg) ((0x4000 <= (__reg) && (__reg) < 0x5000))
+#else
+#define is_reg_le(__reg) 1
+#endif
+
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,12)
-# if (AH_BYTE_ORDER == AH_BIG_ENDIAN)
#define _OS_REG_WRITE(_ah, _reg, _val) do { \
- (0x4000 <= (_reg) && (_reg) < 0x5000) ? \
+ is_reg_le(_reg) ? \
iowrite32((_val), (_ah)->ah_sh + (_reg)) : \
iowrite32be((_val), (_ah)->ah_sh + (_reg)); \
} while (0)
#define _OS_REG_READ(_ah, _reg) \
- ((0x4000 <= (_reg) && (_reg) < 0x5000) ? \
+ (is_reg_le(_reg) ? \
ioread32((_ah)->ah_sh + (_reg)) : \
- ioread32be((_ah)->ah_sh + (_reg)));
-# else /* AH_LITTLE_ENDIAN */
-#define _OS_REG_WRITE(_ah, _reg, _val) do { \
- iowrite32(_val, (_ah)->ah_sh + (_reg)); \
- } while (0)
-#define _OS_REG_READ(_ah, _reg) \
- ioread32((_ah)->ah_sh + (_reg))
-
-# endif /* AH_BYTE_ORDER */
+ ioread32be((_ah)->ah_sh + (_reg)))
#else
-# if (AH_BYTE_ORDER == AH_BIG_ENDIAN)
#define _OS_REG_WRITE(_ah, _reg, _val) do { \
- writel((0x4000 <= (_reg) && (_reg) < 0x5000) ? \
+ writel(is_reg_le(_reg) ? \
(_val) : cpu_to_le32(_val), \
(_ah)->ah_sh + (_reg)); \
} while (0)
#define _OS_REG_READ(_ah, _reg) \
- ((0x4000 <= (_reg) && (_reg) < 0x5000) ? \
+ (is_reg_le(_reg) ? \
readl((_ah)->ah_sh + (_reg)) : \
cpu_to_le32(readl((_ah)->ah_sh + (_reg))))
-# else /* AH_LITTLE_ENDIAN */
-#define _OS_REG_WRITE(_ah, _reg, _val) do { \
- writel(_val, (_ah)->ah_sh + (_reg)); \
- } while (0)
-#define _OS_REG_READ(_ah, _reg) \
- readl((_ah)->ah_sh + (_reg))
-# endif /* AH_BYTE_ORDER */
-#endif /* KERNEL_VERSON(2,6,12) */
-
-/*
-The functions in this section are not intended to be invoked by MadWifi driver
-code, but by the HAL. They are NOT safe for direct invocation when the
-sc->sc_hal_lock is not held. Use ath_reg_read and ATH_REG_WRITE instead!
+#endif /* KERNEL_VERSION(2,6,12) */
+
+/*
+ * The functions in this section are not intended to be invoked by MadWifi
+ * driver code, but by the HAL. They are NOT safe to call directly when the
+ * sc->sc_hal_lock is not held. Use ath_reg_read and ATH_REG_WRITE instead!
*/
#if defined(AH_DEBUG) || defined(AH_REGOPS_FUNC) || defined(AH_DEBUG_ALQ)
#define OS_REG_WRITE(_ah, _reg, _val) ath_hal_reg_write(_ah, _reg, _val)
#define OS_REG_READ(_ah, _reg) ath_hal_reg_read(_ah, _reg)
-extern void __ahdecl ath_hal_reg_write(struct ath_hal *ah, u_int reg, u_int32_t val);
-extern u_int32_t __ahdecl ath_hal_reg_read(struct ath_hal *ah, u_int reg);
+extern void __ahdecl ath_hal_reg_write(struct ath_hal *ah, u_int reg,
+ u_int32_t val);
+extern u_int32_t __ahdecl ath_hal_reg_read(struct ath_hal *ah, u_int reg);
#else
#define OS_REG_WRITE(_ah, _reg, _val) _OS_REG_WRITE(_ah, _reg, _val)
#define OS_REG_READ(_ah, _reg) _OS_REG_READ(_ah, _reg)
-#endif /* AH_DEBUG || AH_REGFUNC || AH_DEBUG_ALQ */
+#endif /* AH_DEBUG || AH_REGFUNC || AH_DEBUG_ALQ */
extern char *ath_hal_func;
static inline void ath_hal_set_function(const char *name)
-#if defined(AH_DEBUG)
{
+#ifdef AH_DEBUG
ath_hal_func = (char *)name;
-}
-#else
-{ }
#endif
+}
#ifdef AH_DEBUG_ALQ
-extern void __ahdecl OS_MARK(struct ath_hal *, u_int id, u_int32_t value);
+extern void __ahdecl OS_MARK(struct ath_hal *, u_int id, u_int32_t value);
#else
#define OS_MARK(_ah, _id, _v)
#endif
@@ -253,8 +255,9 @@
* compiled with the default calling convention and are not called
* from within the HAL.
*/
-extern struct ath_hal *_ath_hal_attach(u_int16_t devid, HAL_SOFTC,
- HAL_BUS_TAG, HAL_BUS_HANDLE, HAL_STATUS*);
-extern void _ath_hal_detach(struct ath_hal *);
+extern struct ath_hal *_ath_hal_attach(u_int16_t devid, HAL_SOFTC,
+ HAL_BUS_TAG, HAL_BUS_HANDLE,
+ HAL_STATUS *);
+extern void _ath_hal_detach(struct ath_hal *);
-#endif /* _ATH_AH_OSDEP_H_ */
+#endif /* _ATH_AH_OSDEP_H_ */
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