sys/mips/atheros/ar71xx_bus_space_reversed.c

   1 /*-
   2  * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
   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 unmodified, this list of conditions, and the following
  10  *    disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  */
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include <sys/param.h>
  31 #include <sys/systm.h>
  32 #include <sys/bus.h>
  33
  34 #include <machine/bus.h>
  35 #include <mips/atheros/ar71xx_bus_space_reversed.h>
  36
  37 static bs_r_1_proto(reversed);
  38 static bs_r_2_proto(reversed);
  39 static bs_w_1_proto(reversed);
  40 static bs_w_2_proto(reversed);
  41
  42 /*
  43  * Bus space that handles offsets in word for 1/2 bytes read/write access.
  44  * Byte order of values is handled by device drivers itself.
  45  */
  46 static struct bus_space bus_space_reversed = {
  47         /* cookie */
  48         (void *) 0,
  49
  50         /* mapping/unmapping */
  51         generic_bs_map,
  52         generic_bs_unmap,
  53         generic_bs_subregion,
  54
  55         /* allocation/deallocation */
  56         NULL,
  57         NULL,
  58
  59         /* barrier */
  60         generic_bs_barrier,
  61
  62         /* read (single) */
  63         reversed_bs_r_1,
  64         reversed_bs_r_2,
  65         generic_bs_r_4,
  66         NULL,
  67
  68         /* read multiple */
  69         generic_bs_rm_1,
  70         generic_bs_rm_2,
  71         generic_bs_rm_4,
  72         NULL,
  73
  74         /* read region */
  75         generic_bs_rr_1,
  76         generic_bs_rr_2,
  77         generic_bs_rr_4,
  78         NULL,
  79
  80         /* write (single) */
  81         reversed_bs_w_1,
  82         reversed_bs_w_2,
  83         generic_bs_w_4,
  84         NULL,
  85
  86         /* write multiple */
  87         generic_bs_wm_1,
  88         generic_bs_wm_2,
  89         generic_bs_wm_4,
  90         NULL,
  91
  92         /* write region */
  93         NULL,
  94         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
 153 bus_space_tag_t ar71xx_bus_space_reversed = &bus_space_reversed;
 154
 155 static uint8_t
 156 reversed_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
 162 static void
 163 reversed_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
 169 static uint16_t
 170 reversed_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
 176 static void
 177 reversed_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 }