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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 *) (unsigned long)(addr)); __v; })
21 #define in_be16(addr) \
22     ({ u16 __v = (*(__force volatile u16 *) (unsigned long)(addr)); __v; })
23 #define in_be32(addr) \
24     ({ u32 __v = (*(__force volatile u32 *) (unsigned long)(addr)); __v; })
25 #define in_le16(addr) \
26     ({ u16 __v = le16_to_cpu(*(__force volatile __le16 *) (unsigned long)(addr)); __v; })
27 #define in_le32(addr) \
28     ({ u32 __v = le32_to_cpu(*(__force volatile __le32 *) (unsigned long)(addr)); __v; })
29 
30 #define out_8(addr,b) (void)((*(__force volatile u8 *) (unsigned long)(addr)) = (b))
31 #define out_be16(addr,w) (void)((*(__force volatile u16 *) (unsigned long)(addr)) = (w))
32 #define out_be32(addr,l) (void)((*(__force volatile u32 *) (unsigned long)(addr)) = (l))
33 #define out_le16(addr,w) (void)((*(__force volatile __le16 *) (unsigned long)(addr)) = cpu_to_le16(w))
34 #define out_le32(addr,l) (void)((*(__force volatile __le32 *) (unsigned long)(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 	(void)({u8 __maybe_unused __w, __v = (b);  u32 _addr = ((u32) (addr)); \
84 	__w = ((*(__force volatile u8 *)  ((_addr | 0x10000) + (__v<<1)))); })
85 #define rom_out_be16(addr, w)	\
86 	(void)({u16 __maybe_unused __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 	(void)({u16 __maybe_unused __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 
raw_insb(volatile u8 __iomem * port,u8 * buf,unsigned int len)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 
raw_outsb(volatile u8 __iomem * port,const u8 * buf,unsigned int nr)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), "0" (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), "0" (buf),
145 			  "1" (tmp));
146 	}
147 }
148 
raw_insw(volatile u16 __iomem * port,u16 * buf,unsigned int nr)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), "0" (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), "0" (buf),
184 			  "1" (tmp));
185 	}
186 }
187 
raw_outsw(volatile u16 __iomem * port,const u16 * buf,unsigned int nr)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), "0" (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), "0" (buf),
224 			  "1" (tmp));
225 	}
226 }
227 
raw_insl(volatile u32 __iomem * port,u32 * buf,unsigned int nr)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), "0" (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), "0" (buf),
263 			  "1" (tmp));
264 	}
265 }
266 
raw_outsl(volatile u32 __iomem * port,const u32 * buf,unsigned int nr)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), "0" (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), "0" (buf),
303 			  "1" (tmp));
304 	}
305 }
306 
307 
raw_insw_swapw(volatile u16 __iomem * port,u16 * buf,unsigned int nr)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 
raw_outsw_swapw(volatile u16 __iomem * port,const u16 * buf,unsigned int nr)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)
raw_rom_insb(volatile u8 __iomem * port,u8 * buf,unsigned int len)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 
raw_rom_outsb(volatile u8 __iomem * port,const u8 * buf,unsigned int len)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 
raw_rom_insw(volatile u16 __iomem * port,u16 * buf,unsigned int nr)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 
raw_rom_outsw(volatile u16 __iomem * port,const u16 * buf,unsigned int nr)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 
raw_rom_insw_swapw(volatile u16 __iomem * port,u16 * buf,unsigned int nr)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 
raw_rom_outsw_swapw(volatile u16 __iomem * port,const u16 * buf,unsigned int nr)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