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
101static 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
110static 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
150static 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
189static 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
229static 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
268static 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
309static 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
362static 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)
417static 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
426static 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
435static 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
444static 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
453static 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
462static 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