1 /*- 2 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer, 10 * without modification. 11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 12 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 13 * redistribution must be conditioned upon including a substantially 14 * similar Disclaimer requirement for further binary redistribution. 15 * 16 * NO WARRANTY 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 21 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 27 * THE POSSIBILITY OF SUCH DAMAGES. 28 * 29 * $FreeBSD$ 30 */ 31 #ifndef _ATH_AH_OSDEP_H_ 32 #define _ATH_AH_OSDEP_H_ 33 /* 34 * Atheros Hardware Access Layer (HAL) OS Dependent Definitions. 35 */ 36 #include <sys/cdefs.h> 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/endian.h> 40 #include <sys/linker_set.h> 41 42 #include <machine/bus.h> 43 44 /* 45 * Bus i/o type definitions. 46 */ 47 typedef void *HAL_SOFTC; 48 typedef bus_space_tag_t HAL_BUS_TAG; 49 typedef bus_space_handle_t HAL_BUS_HANDLE; 50 51 /* 52 * Although the underlying hardware may support 64 bit DMA, the 53 * current Atheros hardware only supports 32 bit addressing. 54 */ 55 typedef uint32_t HAL_DMA_ADDR; 56 57 /* 58 * Linker set writearounds for chip and RF backend registration. 59 */ 60 #define OS_DATA_SET(set, item) DATA_SET(set, item) 61 #define OS_SET_DECLARE(set, ptype) SET_DECLARE(set, ptype) 62 #define OS_SET_FOREACH(pvar, set) SET_FOREACH(pvar, set) 63 64 /* 65 * Delay n microseconds. 66 */ 67 #define OS_DELAY(_n) DELAY(_n) 68 69 #define OS_INLINE __inline 70 #define OS_MEMZERO(_a, _n) bzero((_a), (_n)) 71 #define OS_MEMCPY(_d, _s, _n) memcpy(_d,_s,_n) 72 #define OS_MEMCMP(_a, _b, _l) memcmp((_a), (_b), (_l)) 73 74 #define abs(_a) __builtin_abs(_a) 75 76 struct ath_hal; 77 78 /* 79 * The hardware registers are native little-endian byte order. 80 * Big-endian hosts are handled by enabling hardware byte-swap 81 * of register reads and writes at reset. But the PCI clock 82 * domain registers are not byte swapped! Thus, on big-endian 83 * platforms we have to explicitly byte-swap those registers. 84 * OS_REG_UNSWAPPED identifies the registers that need special handling. 85 * 86 * This is not currently used by the FreeBSD HAL osdep code; the HAL 87 * currently does not configure hardware byteswapping for register space 88 * accesses and instead does it through the FreeBSD bus space code. 89 */ 90 #if _BYTE_ORDER == _BIG_ENDIAN 91 #define OS_REG_UNSWAPPED(_reg) \ 92 (((_reg) >= 0x4000 && (_reg) < 0x5000) || \ 93 ((_reg) >= 0x7000 && (_reg) < 0x8000)) 94 #else /* _BYTE_ORDER == _LITTLE_ENDIAN */ 95 #define OS_REG_UNSWAPPED(_reg) (0) 96 #endif /* _BYTE_ORDER */ 97 98 /* 99 * For USB/SDIO support (where access latencies are quite high); 100 * some write accesses may be buffered and then flushed when 101 * either a read is done, or an explicit flush is done. 102 * 103 * These are simply placeholders for now. 104 */ 105 #define OS_REG_WRITE_BUFFER_ENABLE(_ah) \ 106 do { } while (0) 107 #define OS_REG_WRITE_BUFFER_DISABLE(_ah) \ 108 do { } while (0) 109 #define OS_REG_WRITE_BUFFER_FLUSH(_ah) \ 110 do { } while (0) 111 112 /* 113 * Read and write barriers. Some platforms require more strongly ordered 114 * operations and unfortunately most of the HAL is written assuming everything 115 * is either an x86 or the bus layer will do the barriers for you. 116 * 117 * Read barriers should occur before each read, and write barriers 118 * occur after each write. 119 * 120 * Later on for SDIO/USB parts we will methodize this and make them no-ops; 121 * register accesses will go via USB commands. 122 */ 123 #define OS_BUS_BARRIER_READ BUS_SPACE_BARRIER_READ 124 #define OS_BUS_BARRIER_WRITE BUS_SPACE_BARRIER_WRITE 125 #define OS_BUS_BARRIER_RW \ 126 (BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE) 127 #define OS_BUS_BARRIER(_ah, _start, _len, _t) \ 128 bus_space_barrier((bus_space_tag_t)(_ah)->ah_st, \ 129 (bus_space_handle_t)(_ah)->ah_sh, (_start), (_len), (_t)) 130 #define OS_BUS_BARRIER_REG(_ah, _reg, _t) \ 131 OS_BUS_BARRIER((_ah), (_reg), 4, (_t)) 132 133 /* 134 * Register read/write operations are handled through 135 * platform-dependent routines. 136 */ 137 #define OS_REG_WRITE(_ah, _reg, _val) ath_hal_reg_write(_ah, _reg, _val) 138 #define OS_REG_READ(_ah, _reg) ath_hal_reg_read(_ah, _reg) 139 140 extern void ath_hal_reg_write(struct ath_hal *ah, u_int reg, u_int32_t val); 141 extern u_int32_t ath_hal_reg_read(struct ath_hal *ah, u_int reg); 142 143 #ifdef AH_DEBUG_ALQ 144 extern void OS_MARK(struct ath_hal *, u_int id, u_int32_t value); 145 #else 146 #define OS_MARK(_ah, _id, _v) 147 #endif 148 149 #endif /* _ATH_AH_OSDEP_H_ */ 150