sys/mips/atheros/ar71xx_bus_space_reversed.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice unmodified, this list of conditions, and the following
  12  *    disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29 #include <sys/cdefs.h>
  30 __FBSDID("$FreeBSD$");
  31
  32 #include <sys/param.h>
  33 #include <sys/systm.h>
  34 #include <sys/bus.h>
  35
  36 #include <machine/bus.h>
  37 #include <mips/atheros/ar71xx_bus_space_reversed.h>
  38
  39 static bs_r_1_proto(reversed);
  40 static bs_r_2_proto(reversed);
  41 static bs_w_1_proto(reversed);
  42 static bs_w_2_proto(reversed);
  43
  44 /*
  45  * Bus space that handles offsets in word for 1/2 bytes read/write access.
  46  * Byte order of values is handled by device drivers itself.
  47  */
  48 static struct bus_space bus_space_reversed = {
  49         /* cookie */
  50         (void *) 0,
  51
  52         /* mapping/unmapping */
  53         generic_bs_map,
  54         generic_bs_unmap,
  55         generic_bs_subregion,
  56
  57         /* allocation/deallocation */
  58         NULL,
  59         NULL,
  60
  61         /* barrier */
  62         generic_bs_barrier,
  63
  64         /* read (single) */
  65         reversed_bs_r_1,
  66         reversed_bs_r_2,
  67         generic_bs_r_4,
  68         NULL,
  69
  70         /* read multiple */
  71         generic_bs_rm_1,
  72         generic_bs_rm_2,
  73         generic_bs_rm_4,
  74         NULL,
  75
  76         /* read region */
  77         generic_bs_rr_1,
  78         generic_bs_rr_2,
  79         generic_bs_rr_4,
  80         NULL,
  81
  82         /* write (single) */
  83         reversed_bs_w_1,
  84         reversed_bs_w_2,
  85         generic_bs_w_4,
  86         NULL,
  87
  88         /* write multiple */
  89         generic_bs_wm_1,
  90         generic_bs_wm_2,
  91         generic_bs_wm_4,
  92         NULL,
  93
  94         /* write region */
  95         NULL,
  96         generic_bs_wr_2,
  97         generic_bs_wr_4,
  98         NULL,
  99
 100         /* set multiple */
 101         NULL,
 102         NULL,
 103         NULL,
 104         NULL,
 105
 106         /* set region */
 107         NULL,
 108         generic_bs_sr_2,
 109         generic_bs_sr_4,
 110         NULL,
 111
 112         /* copy */
 113         NULL,
 114         generic_bs_c_2,
 115         NULL,
 116         NULL,
 117
 118         /* read (single) stream */
 119         generic_bs_r_1,
 120         generic_bs_r_2,
 121         generic_bs_r_4,
 122         NULL,
 123
 124         /* read multiple stream */
 125         generic_bs_rm_1,
 126         generic_bs_rm_2,
 127         generic_bs_rm_4,
 128         NULL,
 129
 130         /* read region stream */
 131         generic_bs_rr_1,
 132         generic_bs_rr_2,
 133         generic_bs_rr_4,
 134         NULL,
 135
 136         /* write (single) stream */
 137         generic_bs_w_1,
 138         generic_bs_w_2,
 139         generic_bs_w_4,
 140         NULL,
 141
 142         /* write multiple stream */
 143         generic_bs_wm_1,
 144         generic_bs_wm_2,
 145         generic_bs_wm_4,
 146         NULL,
 147
 148         /* write region stream */
 149         NULL,
 150         generic_bs_wr_2,
 151         generic_bs_wr_4,
 152         NULL,
 153 };
 154
 155 bus_space_tag_t ar71xx_bus_space_reversed = &bus_space_reversed;
 156
 157 static uint8_t
 158 reversed_bs_r_1(void *t, bus_space_handle_t h, bus_size_t o)
 159 {
 160
 161         return readb(h + (o &~ 3) + (3 - (o & 3)));
 162 }
 163
 164 static void
 165 reversed_bs_w_1(void *t, bus_space_handle_t h, bus_size_t o, u_int8_t v)
 166 {
 167
 168         writeb(h + (o &~ 3) + (3 - (o & 3)), v);
 169 }
 170
 171 static uint16_t
 172 reversed_bs_r_2(void *t, bus_space_handle_t h, bus_size_t o)
 173 {
 174
 175         return readw(h + (o &~ 3) + (2 - (o & 3)));
 176 }
 177
 178 static void
 179 reversed_bs_w_2(void *t, bus_space_handle_t h, bus_size_t o, uint16_t v)
 180 {
 181
 182         writew(h + (o &~ 3) + (2 - (o & 3)), v);
 183 }