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 const volatile u8 *) (unsigned long)(addr)); __v; })
21 #define in_be16(addr) \
22 ({ u16 __v = (*(__force const volatile u16 *) (unsigned long)(addr)); __v; })
23 #define in_be32(addr) \
24 ({ u32 __v = (*(__force const volatile u32 *) (unsigned long)(addr)); __v; })
25 #define in_le16(addr) \
26 ({ u16 __v = le16_to_cpu(*(__force const volatile __le16 *) (unsigned long)(addr)); __v; })
27 #define in_le32(addr) \
28 ({ u32 __v = le32_to_cpu(*(__force const 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 const volatile u16 *) (addr)); __v >>= 8; __v; })
77 #define rom_in_be16(addr) \
78 ({ u16 __v = (*(__force const volatile u16 *) (addr)); __v; })
79 #define rom_in_le16(addr) \
80 ({ u16 __v = le16_to_cpu(*(__force const 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(const volatile u8 __iomem * port,u8 * buf,unsigned int len)101 static inline void raw_insb(const volatile u8 __iomem *port, u8 *buf,
102 unsigned int len)
103 {
104 unsigned int i;
105
106 for (i = 0; i < len; i++)
107 *buf++ = in_8(port);
108 }
109
raw_outsb(volatile u8 __iomem * port,const u8 * buf,unsigned int nr)110 static inline void raw_outsb(volatile u8 __iomem *port, const u8 *buf,
111 unsigned int nr)
112 {
113 unsigned int tmp;
114
115 if (nr & 15) {
116 tmp = (nr & 15) - 1;
117 asm volatile (
118 "1: moveb %0@+,%2@; dbra %1,1b"
119 : "=a" (buf), "=d" (tmp)
120 : "a" (port), "0" (buf),
121 "1" (tmp));
122 }
123 if (nr >> 4) {
124 tmp = (nr >> 4) - 1;
125 asm volatile (
126 "1: "
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 "moveb %0@+,%2@; "
143 "dbra %1,1b"
144 : "=a" (buf), "=d" (tmp)
145 : "a" (port), "0" (buf),
146 "1" (tmp));
147 }
148 }
149
raw_insw(volatile const u16 __iomem * port,u16 * buf,unsigned int nr)150 static inline void raw_insw(volatile const u16 __iomem *port, u16 *buf, unsigned int nr)
151 {
152 unsigned int tmp;
153
154 if (nr & 15) {
155 tmp = (nr & 15) - 1;
156 asm volatile (
157 "1: movew %2@,%0@+; dbra %1,1b"
158 : "=a" (buf), "=d" (tmp)
159 : "a" (port), "0" (buf),
160 "1" (tmp));
161 }
162 if (nr >> 4) {
163 tmp = (nr >> 4) - 1;
164 asm volatile (
165 "1: "
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 "movew %2@,%0@+; "
182 "dbra %1,1b"
183 : "=a" (buf), "=d" (tmp)
184 : "a" (port), "0" (buf),
185 "1" (tmp));
186 }
187 }
188
raw_outsw(volatile u16 __iomem * port,const u16 * buf,unsigned int nr)189 static inline void raw_outsw(volatile u16 __iomem *port, const u16 *buf,
190 unsigned int nr)
191 {
192 unsigned int tmp;
193
194 if (nr & 15) {
195 tmp = (nr & 15) - 1;
196 asm volatile (
197 "1: movew %0@+,%2@; dbra %1,1b"
198 : "=a" (buf), "=d" (tmp)
199 : "a" (port), "0" (buf),
200 "1" (tmp));
201 }
202 if (nr >> 4) {
203 tmp = (nr >> 4) - 1;
204 asm volatile (
205 "1: "
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 "movew %0@+,%2@; "
222 "dbra %1,1b"
223 : "=a" (buf), "=d" (tmp)
224 : "a" (port), "0" (buf),
225 "1" (tmp));
226 }
227 }
228
raw_insl(const volatile u32 __iomem * port,u32 * buf,unsigned int nr)229 static inline void raw_insl(const volatile u32 __iomem *port, u32 *buf, unsigned int nr)
230 {
231 unsigned int tmp;
232
233 if (nr & 15) {
234 tmp = (nr & 15) - 1;
235 asm volatile (
236 "1: movel %2@,%0@+; dbra %1,1b"
237 : "=a" (buf), "=d" (tmp)
238 : "a" (port), "0" (buf),
239 "1" (tmp));
240 }
241 if (nr >> 4) {
242 tmp = (nr >> 4) - 1;
243 asm volatile (
244 "1: "
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 "movel %2@,%0@+; "
261 "dbra %1,1b"
262 : "=a" (buf), "=d" (tmp)
263 : "a" (port), "0" (buf),
264 "1" (tmp));
265 }
266 }
267
raw_outsl(volatile u32 __iomem * port,const u32 * buf,unsigned int nr)268 static inline void raw_outsl(volatile u32 __iomem *port, const u32 *buf,
269 unsigned int nr)
270 {
271 unsigned int tmp;
272
273 if (nr & 15) {
274 tmp = (nr & 15) - 1;
275 asm volatile (
276 "1: movel %0@+,%2@; dbra %1,1b"
277 : "=a" (buf), "=d" (tmp)
278 : "a" (port), "0" (buf),
279 "1" (tmp));
280 }
281 if (nr >> 4) {
282 tmp = (nr >> 4) - 1;
283 asm volatile (
284 "1: "
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 "movel %0@+,%2@; "
301 "dbra %1,1b"
302 : "=a" (buf), "=d" (tmp)
303 : "a" (port), "0" (buf),
304 "1" (tmp));
305 }
306 }
307
308
raw_insw_swapw(const volatile u16 __iomem * port,u16 * buf,unsigned int nr)309 static inline void raw_insw_swapw(const volatile u16 __iomem *port, u16 *buf,
310 unsigned int nr)
311 {
312 if ((nr) % 8)
313 __asm__ __volatile__
314 ("\tmovel %0,%/a0\n\t"
315 "movel %1,%/a1\n\t"
316 "movel %2,%/d6\n\t"
317 "subql #1,%/d6\n"
318 "1:\tmovew %/a0@,%/d0\n\t"
319 "rolw #8,%/d0\n\t"
320 "movew %/d0,%/a1@+\n\t"
321 "dbra %/d6,1b"
322 :
323 : "g" (port), "g" (buf), "g" (nr)
324 : "d0", "a0", "a1", "d6");
325 else
326 __asm__ __volatile__
327 ("movel %0,%/a0\n\t"
328 "movel %1,%/a1\n\t"
329 "movel %2,%/d6\n\t"
330 "lsrl #3,%/d6\n\t"
331 "subql #1,%/d6\n"
332 "1:\tmovew %/a0@,%/d0\n\t"
333 "rolw #8,%/d0\n\t"
334 "movew %/d0,%/a1@+\n\t"
335 "movew %/a0@,%/d0\n\t"
336 "rolw #8,%/d0\n\t"
337 "movew %/d0,%/a1@+\n\t"
338 "movew %/a0@,%/d0\n\t"
339 "rolw #8,%/d0\n\t"
340 "movew %/d0,%/a1@+\n\t"
341 "movew %/a0@,%/d0\n\t"
342 "rolw #8,%/d0\n\t"
343 "movew %/d0,%/a1@+\n\t"
344 "movew %/a0@,%/d0\n\t"
345 "rolw #8,%/d0\n\t"
346 "movew %/d0,%/a1@+\n\t"
347 "movew %/a0@,%/d0\n\t"
348 "rolw #8,%/d0\n\t"
349 "movew %/d0,%/a1@+\n\t"
350 "movew %/a0@,%/d0\n\t"
351 "rolw #8,%/d0\n\t"
352 "movew %/d0,%/a1@+\n\t"
353 "movew %/a0@,%/d0\n\t"
354 "rolw #8,%/d0\n\t"
355 "movew %/d0,%/a1@+\n\t"
356 "dbra %/d6,1b"
357 :
358 : "g" (port), "g" (buf), "g" (nr)
359 : "d0", "a0", "a1", "d6");
360 }
361
raw_outsw_swapw(volatile u16 __iomem * port,const u16 * buf,unsigned int nr)362 static inline void raw_outsw_swapw(volatile u16 __iomem *port, const u16 *buf,
363 unsigned int nr)
364 {
365 if ((nr) % 8)
366 __asm__ __volatile__
367 ("movel %0,%/a0\n\t"
368 "movel %1,%/a1\n\t"
369 "movel %2,%/d6\n\t"
370 "subql #1,%/d6\n"
371 "1:\tmovew %/a1@+,%/d0\n\t"
372 "rolw #8,%/d0\n\t"
373 "movew %/d0,%/a0@\n\t"
374 "dbra %/d6,1b"
375 :
376 : "g" (port), "g" (buf), "g" (nr)
377 : "d0", "a0", "a1", "d6");
378 else
379 __asm__ __volatile__
380 ("movel %0,%/a0\n\t"
381 "movel %1,%/a1\n\t"
382 "movel %2,%/d6\n\t"
383 "lsrl #3,%/d6\n\t"
384 "subql #1,%/d6\n"
385 "1:\tmovew %/a1@+,%/d0\n\t"
386 "rolw #8,%/d0\n\t"
387 "movew %/d0,%/a0@\n\t"
388 "movew %/a1@+,%/d0\n\t"
389 "rolw #8,%/d0\n\t"
390 "movew %/d0,%/a0@\n\t"
391 "movew %/a1@+,%/d0\n\t"
392 "rolw #8,%/d0\n\t"
393 "movew %/d0,%/a0@\n\t"
394 "movew %/a1@+,%/d0\n\t"
395 "rolw #8,%/d0\n\t"
396 "movew %/d0,%/a0@\n\t"
397 "movew %/a1@+,%/d0\n\t"
398 "rolw #8,%/d0\n\t"
399 "movew %/d0,%/a0@\n\t"
400 "movew %/a1@+,%/d0\n\t"
401 "rolw #8,%/d0\n\t"
402 "movew %/d0,%/a0@\n\t"
403 "movew %/a1@+,%/d0\n\t"
404 "rolw #8,%/d0\n\t"
405 "movew %/d0,%/a0@\n\t"
406 "movew %/a1@+,%/d0\n\t"
407 "rolw #8,%/d0\n\t"
408 "movew %/d0,%/a0@\n\t"
409 "dbra %/d6,1b"
410 :
411 : "g" (port), "g" (buf), "g" (nr)
412 : "d0", "a0", "a1", "d6");
413 }
414
415
416 #if defined(CONFIG_ATARI_ROM_ISA)
raw_rom_insb(const volatile u8 __iomem * port,u8 * buf,unsigned int len)417 static inline void raw_rom_insb(const volatile u8 __iomem *port, u8 *buf,
418 unsigned int len)
419 {
420 unsigned int i;
421
422 for (i = 0; i < len; i++)
423 *buf++ = rom_in_8(port);
424 }
425
raw_rom_outsb(volatile u8 __iomem * port,const u8 * buf,unsigned int len)426 static inline void raw_rom_outsb(volatile u8 __iomem *port, const u8 *buf,
427 unsigned int len)
428 {
429 unsigned int i;
430
431 for (i = 0; i < len; i++)
432 rom_out_8(port, *buf++);
433 }
434
raw_rom_insw(const volatile u16 __iomem * port,u16 * buf,unsigned int nr)435 static inline void raw_rom_insw(const volatile u16 __iomem *port, u16 *buf,
436 unsigned int nr)
437 {
438 unsigned int i;
439
440 for (i = 0; i < nr; i++)
441 *buf++ = rom_in_be16(port);
442 }
443
raw_rom_outsw(volatile u16 __iomem * port,const u16 * buf,unsigned int nr)444 static inline void raw_rom_outsw(volatile u16 __iomem *port, const u16 *buf,
445 unsigned int nr)
446 {
447 unsigned int i;
448
449 for (i = 0; i < nr; i++)
450 rom_out_be16(port, *buf++);
451 }
452
raw_rom_insw_swapw(const volatile u16 __iomem * port,u16 * buf,unsigned int nr)453 static inline void raw_rom_insw_swapw(const volatile u16 __iomem *port, u16 *buf,
454 unsigned int nr)
455 {
456 unsigned int i;
457
458 for (i = 0; i < nr; i++)
459 *buf++ = rom_in_le16(port);
460 }
461
raw_rom_outsw_swapw(volatile u16 __iomem * port,const u16 * buf,unsigned int nr)462 static inline void raw_rom_outsw_swapw(volatile u16 __iomem *port, const u16 *buf,
463 unsigned int nr)
464 {
465 unsigned int i;
466
467 for (i = 0; i < nr; i++)
468 rom_out_le16(port, *buf++);
469 }
470 #endif /* CONFIG_ATARI_ROM_ISA */
471
472 #endif /* __KERNEL__ */
473
474 #endif /* _RAW_IO_H */
475