1123256Sscottl/*- 2123256Sscottl * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org> 3123256Sscottl * All rights reserved. 4123256Sscottl * 5123256Sscottl * Redistribution and use in source and binary forms, with or without 6123256Sscottl * modification, are permitted provided that the following conditions 7123256Sscottl * are met: 8123256Sscottl * 1. Redistributions of source code must retain the above copyright 9123256Sscottl * notice unmodified, this list of conditions, and the following 10123256Sscottl * disclaimer. 11123256Sscottl * 2. Redistributions in binary form must reproduce the above copyright 12123256Sscottl * notice, this list of conditions and the following disclaimer in the 13123256Sscottl * documentation and/or other materials provided with the distribution. 14123256Sscottl * 15123256Sscottl * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16123256Sscottl * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17123256Sscottl * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18123256Sscottl * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19123256Sscottl * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20123256Sscottl * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21123256Sscottl * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22123256Sscottl * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23123256Sscottl * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24123256Sscottl * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25123256Sscottl * SUCH DAMAGE. 26123256Sscottl */ 27123256Sscottl#include <sys/cdefs.h> 28123256Sscottl__FBSDID("$FreeBSD: releng/10.3/sys/mips/atheros/ar71xx_bus_space_reversed.c 202175 2010-01-12 21:36:08Z imp $"); 29123256Sscottl 30123256Sscottl#include <sys/param.h> 31123256Sscottl#include <sys/systm.h> 32206622Suqs#include <sys/bus.h> 33123256Sscottl 34123256Sscottl#include <machine/bus.h> 35123256Sscottl#include <mips/atheros/ar71xx_bus_space_reversed.h> 36131736Sru 37123256Sscottlstatic bs_r_1_proto(reversed); 38123256Sscottlstatic bs_r_2_proto(reversed); 39123256Sscottlstatic bs_w_1_proto(reversed); 40123256Sscottlstatic bs_w_2_proto(reversed); 41123256Sscottl 42131736Sru/* 43131736Sru * Bus space that handles offsets in word for 1/2 bytes read/write access. 44131736Sru * Byte order of values is handled by device drivers itself. 45131736Sru */ 46131736Srustatic struct bus_space bus_space_reversed = { 47131736Sru /* cookie */ 48128951Shmp (void *) 0, 49123492Sroam 50131736Sru /* mapping/unmapping */ 51131736Sru generic_bs_map, 52131736Sru generic_bs_unmap, 53131736Sru generic_bs_subregion, 54123256Sscottl 55128951Shmp /* allocation/deallocation */ 56131736Sru NULL, 57131736Sru NULL, 58131736Sru 59123256Sscottl /* barrier */ 60131736Sru generic_bs_barrier, 61123256Sscottl 62131736Sru /* read (single) */ 63131736Sru reversed_bs_r_1, 64131736Sru reversed_bs_r_2, 65128951Shmp generic_bs_r_4, 66131736Sru NULL, 67131736Sru 68131736Sru /* read multiple */ 69123256Sscottl generic_bs_rm_1, 70131736Sru generic_bs_rm_2, 71131736Sru generic_bs_rm_4, 72131736Sru NULL, 73128951Shmp 74128951Shmp /* read region */ 75131736Sru generic_bs_rr_1, 76131736Sru generic_bs_rr_2, 77131736Sru generic_bs_rr_4, 78131736Sru NULL, 79131736Sru 80131736Sru /* write (single) */ 81131736Sru reversed_bs_w_1, 82131736Sru reversed_bs_w_2, 83131736Sru generic_bs_w_4, 84131736Sru NULL, 85131736Sru 86131736Sru /* write multiple */ 87131736Sru generic_bs_wm_1, 88123256Sscottl generic_bs_wm_2, 89123256Sscottl generic_bs_wm_4, 90123256Sscottl NULL, 91123256Sscottl 92123256Sscottl /* write region */ 93147647Shmp NULL, 94123256Sscottl generic_bs_wr_2, 95 generic_bs_wr_4, 96 NULL, 97 98 /* set multiple */ 99 NULL, 100 NULL, 101 NULL, 102 NULL, 103 104 /* set region */ 105 NULL, 106 generic_bs_sr_2, 107 generic_bs_sr_4, 108 NULL, 109 110 /* copy */ 111 NULL, 112 generic_bs_c_2, 113 NULL, 114 NULL, 115 116 /* read (single) stream */ 117 generic_bs_r_1, 118 generic_bs_r_2, 119 generic_bs_r_4, 120 NULL, 121 122 /* read multiple stream */ 123 generic_bs_rm_1, 124 generic_bs_rm_2, 125 generic_bs_rm_4, 126 NULL, 127 128 /* read region stream */ 129 generic_bs_rr_1, 130 generic_bs_rr_2, 131 generic_bs_rr_4, 132 NULL, 133 134 /* write (single) stream */ 135 generic_bs_w_1, 136 generic_bs_w_2, 137 generic_bs_w_4, 138 NULL, 139 140 /* write multiple stream */ 141 generic_bs_wm_1, 142 generic_bs_wm_2, 143 generic_bs_wm_4, 144 NULL, 145 146 /* write region stream */ 147 NULL, 148 generic_bs_wr_2, 149 generic_bs_wr_4, 150 NULL, 151}; 152 153bus_space_tag_t ar71xx_bus_space_reversed = &bus_space_reversed; 154 155static uint8_t 156reversed_bs_r_1(void *t, bus_space_handle_t h, bus_size_t o) 157{ 158 159 return readb(h + (o &~ 3) + (3 - (o & 3))); 160} 161 162static void 163reversed_bs_w_1(void *t, bus_space_handle_t h, bus_size_t o, u_int8_t v) 164{ 165 166 writeb(h + (o &~ 3) + (3 - (o & 3)), v); 167} 168 169static uint16_t 170reversed_bs_r_2(void *t, bus_space_handle_t h, bus_size_t o) 171{ 172 173 return readw(h + (o &~ 3) + (2 - (o & 3))); 174} 175 176static void 177reversed_bs_w_2(void *t, bus_space_handle_t h, bus_size_t o, uint16_t v) 178{ 179 180 writew(h + (o &~ 3) + (2 - (o & 3)), v); 181} 182