13004Salanb/*-
23004Salanb * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
33004Salanb * All rights reserved.
43004Salanb *
53004Salanb * Redistribution and use in source and binary forms, with or without
63004Salanb * modification, are permitted provided that the following conditions
73004Salanb * are met:
83004Salanb * 1. Redistributions of source code must retain the above copyright
93004Salanb *    notice unmodified, this list of conditions, and the following
103004Salanb *    disclaimer.
113004Salanb * 2. Redistributions in binary form must reproduce the above copyright
123004Salanb *    notice, this list of conditions and the following disclaimer in the
133004Salanb *    documentation and/or other materials provided with the distribution.
143004Salanb *
153004Salanb * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
163004Salanb * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
173004Salanb * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
183004Salanb * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
193004Salanb * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
203004Salanb * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
213004Salanb * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
223004Salanb * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
233004Salanb * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
243004Salanb * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
253004Salanb * SUCH DAMAGE.
263004Salanb */
273004Salanb#include <sys/cdefs.h>
283004Salanb__FBSDID("$FreeBSD$");
293004Salanb
303004Salanb#include <sys/param.h>
313004Salanb#include <sys/systm.h>
323004Salanb#include <sys/bus.h>
333004Salanb
343004Salanb#include <machine/bus.h>
353004Salanb#include <mips/atheros/ar71xx_bus_space_reversed.h>
363004Salanb
373004Salanbstatic bs_r_1_proto(reversed);
383004Salanbstatic bs_r_2_proto(reversed);
393004Salanbstatic bs_w_1_proto(reversed);
403004Salanbstatic bs_w_2_proto(reversed);
413004Salanb
423004Salanb/*
433004Salanb * Bus space that handles offsets in word for 1/2 bytes read/write access.
443004Salanb * Byte order of values is handled by device drivers itself.
453004Salanb */
463004Salanbstatic struct bus_space bus_space_reversed = {
473004Salanb	/* cookie */
483004Salanb	(void *) 0,
493004Salanb
503004Salanb	/* mapping/unmapping */
513004Salanb	generic_bs_map,
523004Salanb	generic_bs_unmap,
533004Salanb	generic_bs_subregion,
543004Salanb
553004Salanb	/* allocation/deallocation */
563004Salanb	NULL,
573004Salanb	NULL,
583004Salanb
593004Salanb	/* barrier */
603004Salanb	generic_bs_barrier,
613004Salanb
623004Salanb	/* read (single) */
633004Salanb	reversed_bs_r_1,
643004Salanb	reversed_bs_r_2,
653004Salanb	generic_bs_r_4,
663004Salanb	NULL,
673004Salanb
683004Salanb	/* read multiple */
693004Salanb	generic_bs_rm_1,
703004Salanb	generic_bs_rm_2,
713004Salanb	generic_bs_rm_4,
723004Salanb	NULL,
733004Salanb
743004Salanb	/* read region */
753004Salanb	generic_bs_rr_1,
763004Salanb	generic_bs_rr_2,
773004Salanb	generic_bs_rr_4,
783004Salanb	NULL,
793004Salanb
803004Salanb	/* write (single) */
813004Salanb	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
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