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
101static 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
109static 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
149static 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
188static 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
228static 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
267static 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
308static 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
361static 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)
416static 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
424static 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
433static 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
442static 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
451static 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
460static 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