1 /* $NetBSD: podulebus_io.c,v 1.9 2018/03/16 17:56:31 ryo Exp $ */
2
3 /*
4 * Copyright (c) 1997 Mark Brinicombe.
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, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Mark Brinicombe.
18 * 4. The name of the company nor the name of the author may be used to
19 * endorse or promote products derived from this software without specific
20 * prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
26 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
27 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 /*
36 * bus_space I/O functions for podulebus
37 */
38
39 #include <sys/cdefs.h>
40 __KERNEL_RCSID(0, "$NetBSD: podulebus_io.c,v 1.9 2018/03/16 17:56:31 ryo Exp $");
41
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/bus.h>
45
46 /* Proto types for all the bus_space structure functions */
47
48 bs_protos(podulebus);
49 bs_protos(bs_notimpl);
50
51 /* Declare the podulebus bus space tag */
52
53 struct bus_space podulebus_bs_tag = {
54 /* cookie */
55 .bs_cookie = (void *) 2, /* Shift to apply to registers */
56
57 /* mapping/unmapping */
58 .bs_map = podulebus_bs_map,
59 .bs_unmap = podulebus_bs_unmap,
60 .bs_subregion = podulebus_bs_subregion,
61
62 /* allocation/deallocation */
63 .bs_alloc = podulebus_bs_alloc,
64 .bs_free = podulebus_bs_free,
65
66 /* get kernel virtual address */
67 .bs_vaddr = 0, /* there is no linear mapping */
68
69 /* mmap bus space for userland */
70 .bs_mmap = bs_notimpl_bs_mmap, /* there is no bus mapping ... well maybe EASI space? */
71
72 /* barrier */
73 .bs_barrier = podulebus_bs_barrier,
74
75 /* read (single) */
76 .bs_r_1 = podulebus_bs_r_1,
77 .bs_r_2 = podulebus_bs_r_2,
78 .bs_r_4 = podulebus_bs_r_4,
79 .bs_r_8 = bs_notimpl_bs_r_8,
80
81 /* read multiple */
82 .bs_rm_1 = podulebus_bs_rm_1,
83 .bs_rm_2 = podulebus_bs_rm_2,
84 .bs_rm_4 = bs_notimpl_bs_rm_4,
85 .bs_rm_8 = bs_notimpl_bs_rm_8,
86
87 /* read region */
88 .bs_rr_1 = podulebus_bs_rr_1,
89 .bs_rr_2 = podulebus_bs_rr_2,
90 .bs_rr_4 = bs_notimpl_bs_rr_4,
91 .bs_rr_8 = bs_notimpl_bs_rr_8,
92
93 /* write (single) */
94 .bs_w_1 = podulebus_bs_w_1,
95 .bs_w_2 = podulebus_bs_w_2,
96 .bs_w_4 = podulebus_bs_w_4,
97 .bs_w_8 = bs_notimpl_bs_w_8,
98
99 /* write multiple */
100 .bs_wm_1 = podulebus_bs_wm_1,
101 .bs_wm_2 = podulebus_bs_wm_2,
102 .bs_wm_4 = bs_notimpl_bs_wm_4,
103 .bs_wm_8 = bs_notimpl_bs_wm_8,
104
105 /* write region */
106 .bs_wr_1 = podulebus_bs_wr_1,
107 .bs_wr_2 = podulebus_bs_wr_2,
108 .bs_wr_4 = bs_notimpl_bs_wr_4,
109 .bs_wr_8 = bs_notimpl_bs_wr_8,
110
111 /* set multiple */
112 .bs_sm_1 = bs_notimpl_bs_sm_1,
113 .bs_sm_2 = bs_notimpl_bs_sm_2,
114 .bs_sm_4 = bs_notimpl_bs_sm_4,
115 .bs_sm_8 = bs_notimpl_bs_sm_8,
116
117 /* set region */
118 .bs_sr_1 = podulebus_bs_sr_1,
119 .bs_sr_2 = podulebus_bs_sr_2,
120 .bs_sr_4 = bs_notimpl_bs_sr_4,
121 .bs_sr_8 = bs_notimpl_bs_sr_8,
122
123 /* copy */
124 .bs_c_1 = bs_notimpl_bs_c_1,
125 .bs_c_2 = bs_notimpl_bs_c_2,
126 .bs_c_4 = bs_notimpl_bs_c_4,
127 .bs_c_8 = bs_notimpl_bs_c_8,
128 };
129
130 /* bus space functions */
131
132 int
podulebus_bs_map(void * t,bus_addr_t bpa,bus_size_t size,int cacheable,bus_space_handle_t * bshp)133 podulebus_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int cacheable, bus_space_handle_t *bshp)
134 {
135 /*
136 * Temporary implementation as all I/O is already mapped etc.
137 *
138 * Eventually this function will do the mapping check for multiple maps
139 */
140 *bshp = bpa;
141 return(0);
142 }
143
144 int
podulebus_bs_alloc(void * t,bus_addr_t rstart,bus_addr_t rend,bus_size_t size,bus_size_t alignment,bus_size_t boundary,int cacheable,bus_addr_t * bpap,bus_space_handle_t * bshp)145 podulebus_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
146 bus_size_t size, bus_size_t alignment, bus_size_t boundary,
147 int cacheable, bus_addr_t *bpap, bus_space_handle_t *bshp)
148 {
149 panic("podulebus_bs_alloc(): Help!");
150 }
151
152
153 void
podulebus_bs_unmap(void * t,bus_space_handle_t bsh,bus_size_t size)154 podulebus_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
155 {
156 /*
157 * Temporary implementation
158 */
159 }
160
161 void
podulebus_bs_free(void * t,bus_space_handle_t bsh,bus_size_t size)162 podulebus_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
163 {
164
165 panic("podulebus_bs_free(): Help!");
166 /* podulebus_bs_unmap() does all that we need to do. */
167 /* podulebus_bs_unmap(t, bsh, size);*/
168 }
169
170 int
podulebus_bs_subregion(void * t,bus_space_handle_t bsh,bus_size_t offset,bus_size_t size,bus_space_handle_t * nbshp)171 podulebus_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp)
172 {
173
174 *nbshp = bsh + (offset << ((int)t));
175 return (0);
176 }
177
178 void
podulebus_bs_barrier(void * t,bus_space_handle_t bsh,bus_size_t offset,bus_size_t len,int flags)179 podulebus_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t len, int flags)
180 {
181 }
182
183 /* Rough-and-ready implementations from arm26 */
184
185 void
podulebus_bs_rr_1(void * cookie,bus_space_handle_t bsh,bus_size_t offset,uint8_t * datap,bus_size_t count)186 podulebus_bs_rr_1(void *cookie, bus_space_handle_t bsh,
187 bus_size_t offset, uint8_t *datap, bus_size_t count)
188 {
189 int i;
190
191 for (i = 0; i < count; i++)
192 datap[i] = podulebus_bs_r_1(cookie, bsh, offset + i);
193 }
194
195 void
podulebus_bs_rr_2(void * cookie,bus_space_handle_t bsh,bus_size_t offset,uint16_t * datap,bus_size_t count)196 podulebus_bs_rr_2(void *cookie, bus_space_handle_t bsh,
197 bus_size_t offset, uint16_t *datap, bus_size_t count)
198 {
199 int i;
200
201 for (i = 0; i < count; i++)
202 datap[i] = podulebus_bs_r_2(cookie, bsh, offset + i);
203 }
204
205 void
podulebus_bs_wr_1(void * cookie,bus_space_handle_t bsh,bus_size_t offset,uint8_t const * datap,bus_size_t count)206 podulebus_bs_wr_1(void *cookie, bus_space_handle_t bsh,
207 bus_size_t offset, uint8_t const *datap,
208 bus_size_t count)
209 {
210 int i;
211
212 for (i = 0; i < count; i++)
213 podulebus_bs_w_1(cookie, bsh, offset + i, datap[i]);
214 }
215
216 void
podulebus_bs_wr_2(void * cookie,bus_space_handle_t bsh,bus_size_t offset,uint16_t const * datap,bus_size_t count)217 podulebus_bs_wr_2(void *cookie, bus_space_handle_t bsh,
218 bus_size_t offset, uint16_t const *datap,
219 bus_size_t count)
220 {
221 int i;
222
223 for (i = 0; i < count; i++)
224 podulebus_bs_w_2(cookie, bsh, offset + i, datap[i]);
225 }
226
227 void
podulebus_bs_sr_1(void * cookie,bus_space_handle_t bsh,bus_size_t offset,uint8_t value,bus_size_t count)228 podulebus_bs_sr_1(void *cookie, bus_space_handle_t bsh,
229 bus_size_t offset, uint8_t value, bus_size_t count)
230 {
231 int i;
232
233 for (i = 0; i < count; i++)
234 podulebus_bs_w_1(cookie, bsh, offset + i, value);
235 }
236
237 void
podulebus_bs_sr_2(void * cookie,bus_space_handle_t bsh,bus_size_t offset,uint16_t value,bus_size_t count)238 podulebus_bs_sr_2(void *cookie, bus_space_handle_t bsh,
239 bus_size_t offset, uint16_t value, bus_size_t count)
240 {
241 int i;
242
243 for (i = 0; i < count; i++)
244 podulebus_bs_w_2(cookie, bsh, offset + i, value);
245 }
246