1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * linux/include/asm-m68k/raw_io.h
4 *
5 * 10/20/00 RZ: - created from bits of io.h and ide.h to cleanup namespace
6 *
7 */
8
9 #ifndef _RAW_IO_H
10 #define _RAW_IO_H
11
12 #ifdef __KERNEL__
13
14 #include <asm/byteorder.h>
15
16 /* ++roman: The assignments to temp. vars avoid that gcc sometimes generates
17 * two accesses to memory, which may be undesirable for some devices.
18 */
19 #define in_8(addr) \
20 ({ u8 __v = (*(__force volatile u8 *) (addr)); __v; })
21 #define in_be16(addr) \
22 ({ u16 __v = (*(__force volatile u16 *) (addr)); __v; })
23 #define in_be32(addr) \
24 ({ u32 __v = (*(__force volatile u32 *) (addr)); __v; })
25 #define in_le16(addr) \
26 ({ u16 __v = le16_to_cpu(*(__force volatile __le16 *) (addr)); __v; })
27 #define in_le32(addr) \
28 ({ u32 __v = le32_to_cpu(*(__force volatile __le32 *) (addr)); __v; })
29
30 #define out_8(addr,b) (void)((*(__force volatile u8 *) (addr)) = (b))
31 #define out_be16(addr,w) (void)((*(__force volatile u16 *) (addr)) = (w))
32 #define out_be32(addr,l) (void)((*(__force volatile u32 *) (addr)) = (l))
33 #define out_le16(addr,w) (void)((*(__force volatile __le16 *) (addr)) = cpu_to_le16(w))
34 #define out_le32(addr,l) (void)((*(__force volatile __le32 *) (addr)) = cpu_to_le32(l))
35
36 #define raw_inb in_8
37 #define raw_inw in_be16
38 #define raw_inl in_be32
39 #define __raw_readb in_8
40 #define __raw_readw in_be16
41 #define __raw_readl in_be32
42
43 #define raw_outb(val,port) out_8((port),(val))
44 #define raw_outw(val,port) out_be16((port),(val))
45 #define raw_outl(val,port) out_be32((port),(val))
46 #define __raw_writeb(val,addr) out_8((addr),(val))
47 #define __raw_writew(val,addr) out_be16((addr),(val))
48 #define __raw_writel(val,addr) out_be32((addr),(val))
49
50 /*
51 * Atari ROM port (cartridge port) ISA adapter, used for the EtherNEC NE2000
52 * network card driver.
53 * The ISA adapter connects address lines A9-A13 to ISA address lines A0-A4,
54 * and hardwires the rest of the ISA addresses for a base address of 0x300.
55 *
56 * Data lines D8-D15 are connected to ISA data lines D0-D7 for reading.
57 * For writes, address lines A1-A8 are latched to ISA data lines D0-D7
58 * (meaning the bit pattern on A1-A8 can be read back as byte).
59 *
60 * Read and write operations are distinguished by the base address used:
61 * reads are from the ROM A side range, writes are through the B side range
62 * addresses (A side base + 0x10000).
63 *
64 * Reads and writes are byte only.
65 *
66 * 16 bit reads and writes are necessary for the NetUSBee adapter's USB
67 * chipset - 16 bit words are read straight off the ROM port while 16 bit
68 * reads are split into two byte writes. The low byte is latched to the
69 * NetUSBee buffer by a read from the _read_ window (with the data pattern
70 * asserted as A1-A8 address pattern). The high byte is then written to the
71 * write range as usual, completing the write cycle.
72 */
73
74 #if defined(CONFIG_ATARI_ROM_ISA)
75 #define rom_in_8(addr) \
76 ({ u16 __v = (*(__force volatile u16 *) (addr)); __v >>= 8; __v; })
77 #define rom_in_be16(addr) \
78 ({ u16 __v = (*(__force volatile u16 *) (addr)); __v; })
79 #define rom_in_le16(addr) \
80 ({ u16 __v = le16_to_cpu(*(__force volatile u16 *) (addr)); __v; })
81
82 #define rom_out_8(addr, b) \
83 ({u8 __w, __v = (b); u32 _addr = ((u32) (addr)); \
84 __w = ((*(__force volatile u8 *) ((_addr | 0x10000) + (__v<<1)))); })
85 #define rom_out_be16(addr, w) \
86 ({u16 __w, __v = (w); u32 _addr = ((u32) (addr)); \
87 __w = ((*(__force volatile u16 *) ((_addr & 0xFFFF0000UL) + ((__v & 0xFF)<<1)))); \
88 __w = ((*(__force volatile u16 *) ((_addr | 0x10000) + ((__v >> 8)<<1)))); })
89 #define rom_out_le16(addr, w) \
90 ({u16 __w, __v = (w); u32 _addr = ((u32) (addr)); \
91 __w = ((*(__force volatile u16 *) ((_addr & 0xFFFF0000UL) + ((__v >> 8)<<1)))); \
92 __w = ((*(__force volatile u16 *) ((_addr | 0x10000) + ((__v & 0xFF)<<1)))); })
93
94 #define raw_rom_inb rom_in_8
95 #define raw_rom_inw rom_in_be16
96
97 #define raw_rom_outb(val, port) rom_out_8((port), (val))
98 #define raw_rom_outw(val, port) rom_out_be16((port), (val))
99 #endif /* CONFIG_ATARI_ROM_ISA */
100
101 static inline void raw_insb(volatile u8 __iomem *port, u8 *buf, unsigned int len)
102 {
103 unsigned int i;
104
105 for (i = 0; i < len; i++)
106 *buf++ = in_8(port);
107 }
108
109 static inline void raw_outsb(volatile u8 __iomem *port, const u8 *buf,
110 unsigned int nr)
111 {
112 unsigned int tmp;
113
114 if (nr & 15) {
115 tmp = (nr & 15) - 1;
116 asm volatile (
117 "1: moveb %0@+,%2@; dbra %1,1b"
118 : "=a" (buf), "=d" (tmp)
119 : "a" (port), "" (buf),
120 "1" (tmp));
121 }
122 if (nr >> 4) {
123 tmp = (nr >> 4) - 1;
124 asm volatile (
125 "1: "
126 "moveb %0@+,%2@; "
127 "moveb %0@+,%2@; "
128 "moveb %0@+,%2@; "
129 "moveb %0@+,%2@; "
130 "moveb %0@+,%2@; "
131 "moveb %0@+,%2@; "
132 "moveb %0@+,%2@; "
133 "moveb %0@+,%2@; "
134 "moveb %0@+,%2@; "
135 "moveb %0@+,%2@; "
136 "moveb %0@+,%2@; "
137 "moveb %0@+,%2@; "
138 "moveb %0@+,%2@; "
139 "moveb %0@+,%2@; "
140 "moveb %0@+,%2@; "
141 "moveb %0@+,%2@; "
142 "dbra %1,1b"
143 : "=a" (buf), "=d" (tmp)
144 : "a" (port), "" (buf),
145 "1" (tmp));
146 }
147 }
148
149 static inline void raw_insw(volatile u16 __iomem *port, u16 *buf, unsigned int nr)
150 {
151 unsigned int tmp;
152
153 if (nr & 15) {
154 tmp = (nr & 15) - 1;
155 asm volatile (
156 "1: movew %2@,%0@+; dbra %1,1b"
157 : "=a" (buf), "=d" (tmp)
158 : "a" (port), "" (buf),
159 "1" (tmp));
160 }
161 if (nr >> 4) {
162 tmp = (nr >> 4) - 1;
163 asm volatile (
164 "1: "
165 "movew %2@,%0@+; "
166 "movew %2@,%0@+; "
167 "movew %2@,%0@+; "
168 "movew %2@,%0@+; "
169 "movew %2@,%0@+; "
170 "movew %2@,%0@+; "
171 "movew %2@,%0@+; "
172 "movew %2@,%0@+; "
173 "movew %2@,%0@+; "
174 "movew %2@,%0@+; "
175 "movew %2@,%0@+; "
176 "movew %2@,%0@+; "
177 "movew %2@,%0@+; "
178 "movew %2@,%0@+; "
179 "movew %2@,%0@+; "
180 "movew %2@,%0@+; "
181 "dbra %1,1b"
182 : "=a" (buf), "=d" (tmp)
183 : "a" (port), "" (buf),
184 "1" (tmp));
185 }
186 }
187
188 static inline void raw_outsw(volatile u16 __iomem *port, const u16 *buf,
189 unsigned int nr)
190 {
191 unsigned int tmp;
192
193 if (nr & 15) {
194 tmp = (nr & 15) - 1;
195 asm volatile (
196 "1: movew %0@+,%2@; dbra %1,1b"
197 : "=a" (buf), "=d" (tmp)
198 : "a" (port), "" (buf),
199 "1" (tmp));
200 }
201 if (nr >> 4) {
202 tmp = (nr >> 4) - 1;
203 asm volatile (
204 "1: "
205 "movew %0@+,%2@; "
206 "movew %0@+,%2@; "
207 "movew %0@+,%2@; "
208 "movew %0@+,%2@; "
209 "movew %0@+,%2@; "
210 "movew %0@+,%2@; "
211 "movew %0@+,%2@; "
212 "movew %0@+,%2@; "
213 "movew %0@+,%2@; "
214 "movew %0@+,%2@; "
215 "movew %0@+,%2@; "
216 "movew %0@+,%2@; "
217 "movew %0@+,%2@; "
218 "movew %0@+,%2@; "
219 "movew %0@+,%2@; "
220 "movew %0@+,%2@; "
221 "dbra %1,1b"
222 : "=a" (buf), "=d" (tmp)
223 : "a" (port), "" (buf),
224 "1" (tmp));
225 }
226 }
227
228 static inline void raw_insl(volatile u32 __iomem *port, u32 *buf, unsigned int nr)
229 {
230 unsigned int tmp;
231
232 if (nr & 15) {
233 tmp = (nr & 15) - 1;
234 asm volatile (
235 "1: movel %2@,%0@+; dbra %1,1b"
236 : "=a" (buf), "=d" (tmp)
237 : "a" (port), "" (buf),
238 "1" (tmp));
239 }
240 if (nr >> 4) {
241 tmp = (nr >> 4) - 1;
242 asm volatile (
243 "1: "
244 "movel %2@,%0@+; "
245 "movel %2@,%0@+; "
246 "movel %2@,%0@+; "
247 "movel %2@,%0@+; "
248 "movel %2@,%0@+; "
249 "movel %2@,%0@+; "
250 "movel %2@,%0@+; "
251 "movel %2@,%0@+; "
252 "movel %2@,%0@+; "
253 "movel %2@,%0@+; "
254 "movel %2@,%0@+; "
255 "movel %2@,%0@+; "
256 "movel %2@,%0@+; "
257 "movel %2@,%0@+; "
258 "movel %2@,%0@+; "
259 "movel %2@,%0@+; "
260 "dbra %1,1b"
261 : "=a" (buf), "=d" (tmp)
262 : "a" (port), "" (buf),
263 "1" (tmp));
264 }
265 }
266
267 static inline void raw_outsl(volatile u32 __iomem *port, const u32 *buf,
268 unsigned int nr)
269 {
270 unsigned int tmp;
271
272 if (nr & 15) {
273 tmp = (nr & 15) - 1;
274 asm volatile (
275 "1: movel %0@+,%2@; dbra %1,1b"
276 : "=a" (buf), "=d" (tmp)
277 : "a" (port), "" (buf),
278 "1" (tmp));
279 }
280 if (nr >> 4) {
281 tmp = (nr >> 4) - 1;
282 asm volatile (
283 "1: "
284 "movel %0@+,%2@; "
285 "movel %0@+,%2@; "
286 "movel %0@+,%2@; "
287 "movel %0@+,%2@; "
288 "movel %0@+,%2@; "
289 "movel %0@+,%2@; "
290 "movel %0@+,%2@; "
291 "movel %0@+,%2@; "
292 "movel %0@+,%2@; "
293 "movel %0@+,%2@; "
294 "movel %0@+,%2@; "
295 "movel %0@+,%2@; "
296 "movel %0@+,%2@; "
297 "movel %0@+,%2@; "
298 "movel %0@+,%2@; "
299 "movel %0@+,%2@; "
300 "dbra %1,1b"
301 : "=a" (buf), "=d" (tmp)
302 : "a" (port), "" (buf),
303 "1" (tmp));
304 }
305 }
306
307
308 static inline void raw_insw_swapw(volatile u16 __iomem *port, u16 *buf,
309 unsigned int nr)
310 {
311 if ((nr) % 8)
312 __asm__ __volatile__
313 ("\tmovel %0,%/a0\n\t"
314 "movel %1,%/a1\n\t"
315 "movel %2,%/d6\n\t"
316 "subql #1,%/d6\n"
317 "1:\tmovew %/a0@,%/d0\n\t"
318 "rolw #8,%/d0\n\t"
319 "movew %/d0,%/a1@+\n\t"
320 "dbra %/d6,1b"
321 :
322 : "g" (port), "g" (buf), "g" (nr)
323 : "d0", "a0", "a1", "d6");
324 else
325 __asm__ __volatile__
326 ("movel %0,%/a0\n\t"
327 "movel %1,%/a1\n\t"
328 "movel %2,%/d6\n\t"
329 "lsrl #3,%/d6\n\t"
330 "subql #1,%/d6\n"
331 "1:\tmovew %/a0@,%/d0\n\t"
332 "rolw #8,%/d0\n\t"
333 "movew %/d0,%/a1@+\n\t"
334 "movew %/a0@,%/d0\n\t"
335 "rolw #8,%/d0\n\t"
336 "movew %/d0,%/a1@+\n\t"
337 "movew %/a0@,%/d0\n\t"
338 "rolw #8,%/d0\n\t"
339 "movew %/d0,%/a1@+\n\t"
340 "movew %/a0@,%/d0\n\t"
341 "rolw #8,%/d0\n\t"
342 "movew %/d0,%/a1@+\n\t"
343 "movew %/a0@,%/d0\n\t"
344 "rolw #8,%/d0\n\t"
345 "movew %/d0,%/a1@+\n\t"
346 "movew %/a0@,%/d0\n\t"
347 "rolw #8,%/d0\n\t"
348 "movew %/d0,%/a1@+\n\t"
349 "movew %/a0@,%/d0\n\t"
350 "rolw #8,%/d0\n\t"
351 "movew %/d0,%/a1@+\n\t"
352 "movew %/a0@,%/d0\n\t"
353 "rolw #8,%/d0\n\t"
354 "movew %/d0,%/a1@+\n\t"
355 "dbra %/d6,1b"
356 :
357 : "g" (port), "g" (buf), "g" (nr)
358 : "d0", "a0", "a1", "d6");
359 }
360
361 static inline void raw_outsw_swapw(volatile u16 __iomem *port, const u16 *buf,
362 unsigned int nr)
363 {
364 if ((nr) % 8)
365 __asm__ __volatile__
366 ("movel %0,%/a0\n\t"
367 "movel %1,%/a1\n\t"
368 "movel %2,%/d6\n\t"
369 "subql #1,%/d6\n"
370 "1:\tmovew %/a1@+,%/d0\n\t"
371 "rolw #8,%/d0\n\t"
372 "movew %/d0,%/a0@\n\t"
373 "dbra %/d6,1b"
374 :
375 : "g" (port), "g" (buf), "g" (nr)
376 : "d0", "a0", "a1", "d6");
377 else
378 __asm__ __volatile__
379 ("movel %0,%/a0\n\t"
380 "movel %1,%/a1\n\t"
381 "movel %2,%/d6\n\t"
382 "lsrl #3,%/d6\n\t"
383 "subql #1,%/d6\n"
384 "1:\tmovew %/a1@+,%/d0\n\t"
385 "rolw #8,%/d0\n\t"
386 "movew %/d0,%/a0@\n\t"
387 "movew %/a1@+,%/d0\n\t"
388 "rolw #8,%/d0\n\t"
389 "movew %/d0,%/a0@\n\t"
390 "movew %/a1@+,%/d0\n\t"
391 "rolw #8,%/d0\n\t"
392 "movew %/d0,%/a0@\n\t"
393 "movew %/a1@+,%/d0\n\t"
394 "rolw #8,%/d0\n\t"
395 "movew %/d0,%/a0@\n\t"
396 "movew %/a1@+,%/d0\n\t"
397 "rolw #8,%/d0\n\t"
398 "movew %/d0,%/a0@\n\t"
399 "movew %/a1@+,%/d0\n\t"
400 "rolw #8,%/d0\n\t"
401 "movew %/d0,%/a0@\n\t"
402 "movew %/a1@+,%/d0\n\t"
403 "rolw #8,%/d0\n\t"
404 "movew %/d0,%/a0@\n\t"
405 "movew %/a1@+,%/d0\n\t"
406 "rolw #8,%/d0\n\t"
407 "movew %/d0,%/a0@\n\t"
408 "dbra %/d6,1b"
409 :
410 : "g" (port), "g" (buf), "g" (nr)
411 : "d0", "a0", "a1", "d6");
412 }
413
414
415 #if defined(CONFIG_ATARI_ROM_ISA)
416 static inline void raw_rom_insb(volatile u8 __iomem *port, u8 *buf, unsigned int len)
417 {
418 unsigned int i;
419
420 for (i = 0; i < len; i++)
421 *buf++ = rom_in_8(port);
422 }
423
424 static inline void raw_rom_outsb(volatile u8 __iomem *port, const u8 *buf,
425 unsigned int len)
426 {
427 unsigned int i;
428
429 for (i = 0; i < len; i++)
430 rom_out_8(port, *buf++);
431 }
432
433 static inline void raw_rom_insw(volatile u16 __iomem *port, u16 *buf,
434 unsigned int nr)
435 {
436 unsigned int i;
437
438 for (i = 0; i < nr; i++)
439 *buf++ = rom_in_be16(port);
440 }
441
442 static inline void raw_rom_outsw(volatile u16 __iomem *port, const u16 *buf,
443 unsigned int nr)
444 {
445 unsigned int i;
446
447 for (i = 0; i < nr; i++)
448 rom_out_be16(port, *buf++);
449 }
450
451 static inline void raw_rom_insw_swapw(volatile u16 __iomem *port, u16 *buf,
452 unsigned int nr)
453 {
454 unsigned int i;
455
456 for (i = 0; i < nr; i++)
457 *buf++ = rom_in_le16(port);
458 }
459
460 static inline void raw_rom_outsw_swapw(volatile u16 __iomem *port, const u16 *buf,
461 unsigned int nr)
462 {
463 unsigned int i;
464
465 for (i = 0; i < nr; i++)
466 rom_out_le16(port, *buf++);
467 }
468 #endif /* CONFIG_ATARI_ROM_ISA */
469
470 #endif /* __KERNEL__ */
471
472 #endif /* _RAW_IO_H */
473
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