FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/am79c930.c
1 /* $NetBSD: am79c930.c,v 1.13 2005/02/27 00:27:00 perry Exp $ */
2
3 /*-
4 * Copyright (c) 1999 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Bill Sommerfeld
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the NetBSD
21 * Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 * contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39 /*
40 * Am79c930 chip driver.
41 *
42 * This is used by the awi driver to use the shared
43 * memory attached to the 79c930 to communicate with the firmware running
44 * in the 930's on-board 80188 core.
45 *
46 * The 79c930 can be mapped into just I/O space, or also have a
47 * memory mapping; the mapping must be set up by the bus front-end
48 * before am79c930_init is called.
49 */
50
51 /*
52 * operations:
53 *
54 * read_8, read_16, read_32, read_64, read_bytes
55 * write_8, write_16, write_32, write_64, write_bytes
56 * (two versions, depending on whether memory-space or i/o space is in use).
57 *
58 * interrupt E.C.
59 * start isr
60 * end isr
61 */
62
63 #include <sys/cdefs.h>
64 #ifdef __NetBSD__
65 __KERNEL_RCSID(0, "$NetBSD: am79c930.c,v 1.13 2005/02/27 00:27:00 perry Exp $");
66 #endif
67 #ifdef __FreeBSD__
68 __FBSDID("$FreeBSD$");
69 #endif
70
71 #include <sys/param.h>
72 #include <sys/systm.h>
73 #include <sys/endian.h>
74 #ifndef __FreeBSD__
75 #include <sys/device.h>
76 #endif
77
78 #include <machine/cpu.h>
79 #ifdef __FreeBSD__
80 #include <machine/bus_pio.h>
81 #include <machine/bus_memio.h>
82 #endif
83 #include <machine/bus.h>
84 #ifdef __NetBSD__
85 #include <machine/intr.h>
86 #endif
87
88 #ifdef __NetBSD__
89 #include <dev/ic/am79c930reg.h>
90 #include <dev/ic/am79c930var.h>
91 #endif
92 #ifdef __FreeBSD__
93 #include <dev/awi/am79c930reg.h>
94 #include <dev/awi/am79c930var.h>
95 #endif
96
97 #define AM930_DELAY(x) /*nothing*/
98
99 #ifndef __BUS_SPACE_HAS_STREAM_METHODS
100 #define bus_space_read_stream_2 bus_space_read_2
101 #define bus_space_read_stream_4 bus_space_read_4
102 #define bus_space_write_stream_2 bus_space_write_2
103 #define bus_space_write_stream_4 bus_space_write_4
104 #endif /* __BUS_SPACE_HAS_STREAM_METHODS */
105
106 void am79c930_regdump(struct am79c930_softc *sc);
107
108 static void io_write_1(struct am79c930_softc *, u_int32_t, u_int8_t);
109 static void io_write_2(struct am79c930_softc *, u_int32_t, u_int16_t);
110 static void io_write_4(struct am79c930_softc *, u_int32_t, u_int32_t);
111 static void io_write_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
112
113 static u_int8_t io_read_1(struct am79c930_softc *, u_int32_t);
114 static u_int16_t io_read_2(struct am79c930_softc *, u_int32_t);
115 static u_int32_t io_read_4(struct am79c930_softc *, u_int32_t);
116 static void io_read_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
117
118 static void mem_write_1(struct am79c930_softc *, u_int32_t, u_int8_t);
119 static void mem_write_2(struct am79c930_softc *, u_int32_t, u_int16_t);
120 static void mem_write_4(struct am79c930_softc *, u_int32_t, u_int32_t);
121 static void mem_write_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
122
123 static u_int8_t mem_read_1(struct am79c930_softc *, u_int32_t);
124 static u_int16_t mem_read_2(struct am79c930_softc *, u_int32_t);
125 static u_int32_t mem_read_4(struct am79c930_softc *, u_int32_t);
126 static void mem_read_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
127
128 static struct am79c930_ops iospace_ops = {
129 io_write_1,
130 io_write_2,
131 io_write_4,
132 io_write_bytes,
133 io_read_1,
134 io_read_2,
135 io_read_4,
136 io_read_bytes
137 };
138
139 struct am79c930_ops memspace_ops = {
140 mem_write_1,
141 mem_write_2,
142 mem_write_4,
143 mem_write_bytes,
144 mem_read_1,
145 mem_read_2,
146 mem_read_4,
147 mem_read_bytes
148 };
149
150 static void
151 io_write_1( struct am79c930_softc *sc, u_int32_t off, u_int8_t val)
152 {
153 AM930_DELAY(1);
154 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
155 ((off>>8)& 0x7f));
156 AM930_DELAY(1);
157 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
158 AM930_DELAY(1);
159 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA, val);
160 AM930_DELAY(1);
161 }
162
163 static void
164 io_write_2(struct am79c930_softc *sc, u_int32_t off, u_int16_t val)
165 {
166 AM930_DELAY(1);
167 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
168 ((off>>8)& 0x7f));
169 AM930_DELAY(1);
170 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff));
171 AM930_DELAY(1);
172 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA, val & 0xff);
173 AM930_DELAY(1);
174 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA, (val>>8)&0xff);
175 AM930_DELAY(1);
176 }
177
178 static void
179 io_write_4(struct am79c930_softc *sc, u_int32_t off, u_int32_t val)
180 {
181 AM930_DELAY(1);
182 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
183 ((off>>8)& 0x7f));
184 AM930_DELAY(1);
185 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff));
186 AM930_DELAY(1);
187 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,val & 0xff);
188 AM930_DELAY(1);
189 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>8)&0xff);
190 AM930_DELAY(1);
191 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>16)&0xff);
192 AM930_DELAY(1);
193 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>24)&0xff);
194 AM930_DELAY(1);
195 }
196
197 static void
198 io_write_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
199 size_t len)
200 {
201 int i;
202
203 AM930_DELAY(1);
204 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
205 ((off>>8)& 0x7f));
206 AM930_DELAY(1);
207 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff));
208 AM930_DELAY(1);
209 for (i=0; i<len; i++)
210 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,ptr[i]);
211 }
212
213 static u_int8_t
214 io_read_1(struct am79c930_softc *sc, u_int32_t off)
215 {
216 u_int8_t val;
217
218 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
219 ((off>>8)& 0x7f));
220 AM930_DELAY(1);
221 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
222 AM930_DELAY(1);
223 val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA);
224 AM930_DELAY(1);
225 return val;
226 }
227
228 static u_int16_t
229 io_read_2(struct am79c930_softc *sc, u_int32_t off)
230 {
231 u_int16_t val;
232
233 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
234 ((off>>8)& 0x7f));
235 AM930_DELAY(1);
236 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
237 AM930_DELAY(1);
238 val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA);
239 AM930_DELAY(1);
240 val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 8;
241 AM930_DELAY(1);
242 return val;
243 }
244
245 static u_int32_t
246 io_read_4(struct am79c930_softc *sc, u_int32_t off)
247 {
248 u_int32_t val;
249
250 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
251 ((off>>8)& 0x7f));
252 AM930_DELAY(1);
253 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
254 AM930_DELAY(1);
255 val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA);
256 AM930_DELAY(1);
257 val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 8;
258 AM930_DELAY(1);
259 val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 16;
260 AM930_DELAY(1);
261 val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 24;
262 AM930_DELAY(1);
263 return val;
264 }
265
266 static void
267 io_read_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
268 size_t len)
269 {
270 int i;
271
272 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
273 ((off>>8)& 0x7f));
274 AM930_DELAY(1);
275 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
276 AM930_DELAY(1);
277 for (i=0; i<len; i++)
278 ptr[i] = bus_space_read_1(sc->sc_iot, sc->sc_ioh,
279 AM79C930_IODPA);
280 }
281
282 static void
283 mem_write_1(struct am79c930_softc *sc, u_int32_t off, u_int8_t val)
284 {
285 bus_space_write_1(sc->sc_memt, sc->sc_memh, off, val);
286 }
287
288 static void
289 mem_write_2(struct am79c930_softc *sc, u_int32_t off, u_int16_t val)
290 {
291 bus_space_tag_t t = sc->sc_memt;
292 bus_space_handle_t h = sc->sc_memh;
293
294 /* could be unaligned */
295 if ((off & 0x1) == 0)
296 bus_space_write_stream_2(t, h, off, htole16(val));
297 else {
298 bus_space_write_1(t, h, off, val & 0xff);
299 bus_space_write_1(t, h, off+1, (val >> 8) & 0xff);
300 }
301 }
302
303 static void
304 mem_write_4(struct am79c930_softc *sc, u_int32_t off, u_int32_t val)
305 {
306 bus_space_tag_t t = sc->sc_memt;
307 bus_space_handle_t h = sc->sc_memh;
308
309 /* could be unaligned */
310 if ((off & 0x3) == 0)
311 bus_space_write_stream_4(t, h, off, htole32(val));
312 else {
313 bus_space_write_1(t, h, off, val & 0xff);
314 bus_space_write_1(t, h, off+1, (val >> 8) & 0xff);
315 bus_space_write_1(t, h, off+2, (val >> 16) & 0xff);
316 bus_space_write_1(t, h, off+3, (val >> 24) & 0xff);
317 }
318 }
319
320 static void
321 mem_write_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
322 size_t len)
323 {
324 bus_space_write_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len);
325 }
326
327 static u_int8_t
328 mem_read_1(struct am79c930_softc *sc, u_int32_t off)
329 {
330 return bus_space_read_1(sc->sc_memt, sc->sc_memh, off);
331 }
332
333 static u_int16_t
334 mem_read_2(struct am79c930_softc *sc, u_int32_t off)
335 {
336 /* could be unaligned */
337 if ((off & 0x1) == 0)
338 return le16toh(bus_space_read_stream_2(sc->sc_memt,
339 sc->sc_memh, off));
340 else
341 return
342 bus_space_read_1(sc->sc_memt, sc->sc_memh, off ) |
343 (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) << 8);
344 }
345
346 static u_int32_t
347 mem_read_4(struct am79c930_softc *sc, u_int32_t off)
348 {
349 /* could be unaligned */
350 if ((off & 0x3) == 0)
351 return le32toh(bus_space_read_stream_4(sc->sc_memt, sc->sc_memh,
352 off));
353 else
354 return
355 bus_space_read_1(sc->sc_memt, sc->sc_memh, off ) |
356 (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) << 8) |
357 (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+2) <<16) |
358 (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+3) <<24);
359 }
360
361 static void
362 mem_read_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
363 size_t len)
364 {
365 bus_space_read_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len);
366 }
367
368
369 /*
370 * Set bits in GCR.
371 */
372
373 void
374 am79c930_gcr_setbits(struct am79c930_softc *sc, u_int8_t bits)
375 {
376 u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
377
378 gcr |= bits;
379
380 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr);
381 }
382
383 /*
384 * Clear bits in GCR.
385 */
386
387 void
388 am79c930_gcr_clearbits(struct am79c930_softc *sc, u_int8_t bits)
389 {
390 u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
391
392 gcr &= ~bits;
393
394 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr);
395 }
396
397 u_int8_t
398 am79c930_gcr_read(struct am79c930_softc *sc)
399 {
400 return bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
401 }
402
403 #if 0
404 void
405 am79c930_regdump(struct am79c930_softc *sc)
406 {
407 u_int8_t buf[8];
408 int i;
409
410 AM930_DELAY(5);
411 for (i=0; i<8; i++) {
412 buf[i] = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, i);
413 AM930_DELAY(5);
414 }
415 printf("am79c930: regdump:");
416 for (i=0; i<8; i++) {
417 printf(" %02x", buf[i]);
418 }
419 printf("\n");
420 }
421 #endif
422
423 void
424 am79c930_chip_init(struct am79c930_softc *sc, int how)
425 {
426 /* zero the bank select register, and leave it that way.. */
427 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_BSS, 0);
428 if (how)
429 sc->sc_ops = &memspace_ops;
430 else
431 sc->sc_ops = &iospace_ops;
432 }
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