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Macpaul Lin00f892f2011-10-11 22:33:15 +00001/*
2 * linux/include/asm-nds/io.h
3 *
4 * Copyright (C) 1996-2000 Russell King
5 *
6 * Copyright (C) 2011 Andes Technology Corporation
7 * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
8 * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
9 *
Tom Rini99ca91b2013-07-24 09:39:00 -040010 * SPDX-License-Identifier: GPL-2.0
Macpaul Lin00f892f2011-10-11 22:33:15 +000011 *
12 * Modifications:
13 * 16-Sep-1996 RMK Inlined the inx/outx functions & optimised for both
14 * constant addresses and variable addresses.
15 * 04-Dec-1997 RMK Moved a lot of this stuff to the new architecture
16 * specific IO header files.
17 * 27-Mar-1999 PJB Second parameter of memcpy_toio is const..
18 * 04-Apr-1999 PJB Added check_signature.
19 * 12-Dec-1999 RMK More cleanups
20 * 18-Jun-2000 RMK Removed virt_to_* and friends definitions
21 */
22#ifndef __ASM_NDS_IO_H
23#define __ASM_NDS_IO_H
24
25/*
26 * CAUTION:
27 * - do not implement for NDS32 Arch yet.
28 * - cmd_pci.c, cmd_scsi.c, Lynxkdi.c, usb.c, usb_storage.c, etc...
29 * iinclude asm/io.h
30 */
31
32#ifdef __KERNEL__
33
34#include <linux/types.h>
35#include <asm/byteorder.h>
36
37static inline void sync(void)
38{
39}
40
41/*
42 * Given a physical address and a length, return a virtual address
43 * that can be used to access the memory range with the caching
44 * properties specified by "flags".
45 */
46#define MAP_NOCACHE (0)
47#define MAP_WRCOMBINE (0)
48#define MAP_WRBACK (0)
49#define MAP_WRTHROUGH (0)
50
51static inline void *
52map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
53{
54 return (void *)paddr;
55}
56
57/*
58 * Take down a mapping set up by map_physmem().
59 */
60static inline void unmap_physmem(void *vaddr, unsigned long flags)
61{
62
63}
64
65static inline phys_addr_t virt_to_phys(void *vaddr)
66{
67 return (phys_addr_t)(vaddr);
68}
69
70/*
71 * Generic virtual read/write. Note that we don't support half-word
72 * read/writes. We define __arch_*[bl] here, and leave __arch_*w
73 * to the architecture specific code.
74 */
75#define __arch_getb(a) (*(unsigned char *)(a))
76#define __arch_getw(a) (*(unsigned short *)(a))
77#define __arch_getl(a) (*(unsigned int *)(a))
78
79#define __arch_putb(v, a) (*(unsigned char *)(a) = (v))
80#define __arch_putw(v, a) (*(unsigned short *)(a) = (v))
81#define __arch_putl(v, a) (*(unsigned int *)(a) = (v))
82
83extern void __raw_writesb(unsigned int addr, const void *data, int bytelen);
84extern void __raw_writesw(unsigned int addr, const void *data, int wordlen);
85extern void __raw_writesl(unsigned int addr, const void *data, int longlen);
86
87extern void __raw_readsb(unsigned int addr, void *data, int bytelen);
88extern void __raw_readsw(unsigned int addr, void *data, int wordlen);
89extern void __raw_readsl(unsigned int addr, void *data, int longlen);
90
91#define __raw_writeb(v, a) __arch_putb(v, a)
92#define __raw_writew(v, a) __arch_putw(v, a)
93#define __raw_writel(v, a) __arch_putl(v, a)
94
95#define __raw_readb(a) __arch_getb(a)
96#define __raw_readw(a) __arch_getw(a)
97#define __raw_readl(a) __arch_getl(a)
98
Macpaul Lina53ef5e2011-10-24 13:31:05 +080099/*
100 * TODO: The kernel offers some more advanced versions of barriers, it might
101 * have some advantages to use them instead of the simple one here.
102 */
103#define dmb() __asm__ __volatile__ ("" : : : "memory")
104#define __iormb() dmb()
105#define __iowmb() dmb()
Macpaul Lin00f892f2011-10-11 22:33:15 +0000106
Macpaul Lina53ef5e2011-10-24 13:31:05 +0800107static inline void writeb(unsigned char val, unsigned char *addr)
108{
109 __iowmb();
110 __arch_putb(val, addr);
111}
112
113static inline void writew(unsigned short val, unsigned short *addr)
114{
115 __iowmb();
116 __arch_putw(val, addr);
117
118}
119
120static inline void writel(unsigned int val, unsigned int *addr)
121{
122 __iowmb();
123 __arch_putl(val, addr);
124}
125
126static inline unsigned char readb(unsigned char *addr)
127{
128 u8 val;
129
130 val = __arch_getb(addr);
131 __iormb();
132 return val;
133}
134
135static inline unsigned short readw(unsigned short *addr)
136{
137 u16 val;
138
139 val = __arch_getw(addr);
140 __iormb();
141 return val;
142}
143
144static inline unsigned int readl(unsigned int *addr)
145{
146 u32 val;
147
148 val = __arch_getl(addr);
149 __iormb();
150 return val;
151}
Macpaul Lin00f892f2011-10-11 22:33:15 +0000152
153/*
154 * The compiler seems to be incapable of optimising constants
155 * properly. Spell it out to the compiler in some cases.
156 * These are only valid for small values of "off" (< 1<<12)
157 */
158#define __raw_base_writeb(val, base, off) __arch_base_putb(val, base, off)
159#define __raw_base_writew(val, base, off) __arch_base_putw(val, base, off)
160#define __raw_base_writel(val, base, off) __arch_base_putl(val, base, off)
161
162#define __raw_base_readb(base, off) __arch_base_getb(base, off)
163#define __raw_base_readw(base, off) __arch_base_getw(base, off)
164#define __raw_base_readl(base, off) __arch_base_getl(base, off)
165
Macpaul Lind21f6e52011-09-23 18:00:13 +0800166#define out_arch(type, endian, a, v) __raw_write##type(cpu_to_##endian(v), a)
167#define in_arch(type, endian, a) endian##_to_cpu(__raw_read##type(a))
168
169#define out_le32(a, v) out_arch(l, le32, a, v)
170#define out_le16(a, v) out_arch(w, le16, a, v)
171
172#define in_le32(a) in_arch(l, le32, a)
173#define in_le16(a) in_arch(w, le16, a)
174
175#define out_be32(a, v) out_arch(l, be32, a, v)
176#define out_be16(a, v) out_arch(w, be16, a, v)
177
178#define in_be32(a) in_arch(l, be32, a)
179#define in_be16(a) in_arch(w, be16, a)
180
181#define out_8(a, v) __raw_writeb(v, a)
182#define in_8(a) __raw_readb(a)
183
Macpaul Lin00f892f2011-10-11 22:33:15 +0000184/*
Gabor Juhosbea28682013-05-26 12:11:26 +0200185 * Clear and set bits in one shot. These macros can be used to clear and
186 * set multiple bits in a register using a single call. These macros can
187 * also be used to set a multiple-bit bit pattern using a mask, by
188 * specifying the mask in the 'clear' parameter and the new bit pattern
189 * in the 'set' parameter.
190 */
191
192#define clrbits(type, addr, clear) \
193 out_##type((addr), in_##type(addr) & ~(clear))
194
195#define setbits(type, addr, set) \
196 out_##type((addr), in_##type(addr) | (set))
197
198#define clrsetbits(type, addr, clear, set) \
199 out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
200
201#define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
202#define setbits_be32(addr, set) setbits(be32, addr, set)
203#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
204
205#define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
206#define setbits_le32(addr, set) setbits(le32, addr, set)
207#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
208
209#define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
210#define setbits_be16(addr, set) setbits(be16, addr, set)
211#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
212
213#define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
214#define setbits_le16(addr, set) setbits(le16, addr, set)
215#define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
216
217#define clrbits_8(addr, clear) clrbits(8, addr, clear)
218#define setbits_8(addr, set) setbits(8, addr, set)
219#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
220
221/*
Macpaul Lin00f892f2011-10-11 22:33:15 +0000222 * Now, pick up the machine-defined IO definitions
223 * #include <asm/arch/io.h>
224 */
225
226/*
227 * IO port access primitives
228 * -------------------------
229 *
230 * The NDS32 doesn't have special IO access instructions just like ARM;
231 * all IO is memory mapped.
232 * Note that these are defined to perform little endian accesses
233 * only. Their primary purpose is to access PCI and ISA peripherals.
234 *
235 * Note that for a big endian machine, this implies that the following
236 * big endian mode connectivity is in place, as described by numerious
237 * ARM documents:
238 *
239 * PCI: D0-D7 D8-D15 D16-D23 D24-D31
240 * ARM: D24-D31 D16-D23 D8-D15 D0-D7
241 *
242 * The machine specific io.h include defines __io to translate an "IO"
243 * address to a memory address.
244 *
245 * Note that we prevent GCC re-ordering or caching values in expressions
246 * by introducing sequence points into the in*() definitions. Note that
247 * __raw_* do not guarantee this behaviour.
248 *
249 * The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space.
250 */
251#ifdef __io
252#define outb(v, p) __raw_writeb(v, __io(p))
253#define outw(v, p) __raw_writew(cpu_to_le16(v), __io(p))
254#define outl(v, p) __raw_writel(cpu_to_le32(v), __io(p))
255
256#define inb(p) ({ unsigned int __v = __raw_readb(__io(p)); __v; })
257#define inw(p) ({ unsigned int __v = le16_to_cpu(__raw_readw(__io(p))); __v; })
258#define inl(p) ({ unsigned int __v = le32_to_cpu(__raw_readl(__io(p))); __v; })
259
260#define outsb(p, d, l) writesb(__io(p), d, l)
261#define outsw(p, d, l) writesw(__io(p), d, l)
262#define outsl(p, d, l) writesl(__io(p), d, l)
263
264#define insb(p, d, l) readsb(__io(p), d, l)
265#define insw(p, d, l) readsw(__io(p), d, l)
266#define insl(p, d, l) readsl(__io(p), d, l)
267
268static inline void readsb(unsigned int *addr, void * data, int bytelen)
269{
270 unsigned char *ptr = (unsigned char *)addr;
271 unsigned char *ptr2 = (unsigned char *)data;
272 while (bytelen) {
273 *ptr2 = *ptr;
274 ptr2++;
275 bytelen--;
276 }
277}
278
279static inline void readsw(unsigned int *addr, void * data, int wordlen)
280{
281 unsigned short *ptr = (unsigned short *)addr;
282 unsigned short *ptr2 = (unsigned short *)data;
283 while (wordlen) {
284 *ptr2 = *ptr;
285 ptr2++;
286 wordlen--;
287 }
288}
289
290static inline void readsl(unsigned int *addr, void * data, int longlen)
291{
292 unsigned int *ptr = (unsigned int *)addr;
293 unsigned int *ptr2 = (unsigned int *)data;
294 while (longlen) {
295 *ptr2 = *ptr;
296 ptr2++;
297 longlen--;
298 }
299}
300static inline void writesb(unsigned int *addr, const void * data, int bytelen)
301{
302 unsigned char *ptr = (unsigned char *)addr;
303 unsigned char *ptr2 = (unsigned char *)data;
304 while (bytelen) {
305 *ptr = *ptr2;
306 ptr2++;
307 bytelen--;
308 }
309}
310static inline void writesw(unsigned int *addr, const void * data, int wordlen)
311{
312 unsigned short *ptr = (unsigned short *)addr;
313 unsigned short *ptr2 = (unsigned short *)data;
314 while (wordlen) {
315 *ptr = *ptr2;
316 ptr2++;
317 wordlen--;
318 }
319}
320static inline void writesl(unsigned int *addr, const void * data, int longlen)
321{
322 unsigned int *ptr = (unsigned int *)addr;
323 unsigned int *ptr2 = (unsigned int *)data;
324 while (longlen) {
325 *ptr = *ptr2;
326 ptr2++;
327 longlen--;
328 }
329}
330#endif
331
332#define outb_p(val, port) outb((val), (port))
333#define outw_p(val, port) outw((val), (port))
334#define outl_p(val, port) outl((val), (port))
335#define inb_p(port) inb((port))
336#define inw_p(port) inw((port))
337#define inl_p(port) inl((port))
338
339#define outsb_p(port, from, len) outsb(port, from, len)
340#define outsw_p(port, from, len) outsw(port, from, len)
341#define outsl_p(port, from, len) outsl(port, from, len)
342#define insb_p(port, to, len) insb(port, to, len)
343#define insw_p(port, to, len) insw(port, to, len)
344#define insl_p(port, to, len) insl(port, to, len)
345
346/*
Macpaul Lin00f892f2011-10-11 22:33:15 +0000347 * DMA-consistent mapping functions. These allocate/free a region of
348 * uncached, unwrite-buffered mapped memory space for use with DMA
349 * devices. This is the "generic" version. The PCI specific version
350 * is in pci.h
351 */
352extern void *consistent_alloc(int gfp, size_t size, dma_addr_t *handle);
353extern void consistent_free(void *vaddr, size_t size, dma_addr_t handle);
354extern void consistent_sync(void *vaddr, size_t size, int rw);
355
356/*
357 * String version of IO memory access ops:
358 */
359extern void _memcpy_fromio(void *, unsigned long, size_t);
360extern void _memcpy_toio(unsigned long, const void *, size_t);
361extern void _memset_io(unsigned long, int, size_t);
362
363extern void __readwrite_bug(const char *fn);
364
365/*
366 * If this architecture has PCI memory IO, then define the read/write
367 * macros. These should only be used with the cookie passed from
368 * ioremap.
369 */
370#ifdef __mem_pci
371
372#define readb(c) ({ unsigned int __v = \
373 __raw_readb(__mem_pci(c)); __v; })
374#define readw(c) ({ unsigned int __v = \
375 le16_to_cpu(__raw_readw(__mem_pci(c))); __v; })
376#define readl(c) ({ unsigned int __v = \
377 le32_to_cpu(__raw_readl(__mem_pci(c))); __v; })
378
379#define writeb(v, c) __raw_writeb(v, __mem_pci(c))
380#define writew(v, c) __raw_writew(cpu_to_le16(v), __mem_pci(c))
381#define writel(v, c) __raw_writel(cpu_to_le32(v), __mem_pci(c))
382
383#define memset_io(c, v, l) _memset_io(__mem_pci(c), (v), (l))
384#define memcpy_fromio(a, c, l) _memcpy_fromio((a), __mem_pci(c), (l))
385#define memcpy_toio(c, a, l) _memcpy_toio(__mem_pci(c), (a), (l))
386
387#define eth_io_copy_and_sum(s, c, l, b) \
388 eth_copy_and_sum((s), __mem_pci(c), (l), (b))
389
390static inline int
391check_signature(unsigned long io_addr, const unsigned char *signature,
392 int length)
393{
394 int retval = 0;
395 do {
396 if (readb(io_addr) != *signature)
397 goto out;
398 io_addr++;
399 signature++;
400 length--;
401 } while (length);
402 retval = 1;
403out:
404 return retval;
405}
Macpaul Lin00f892f2011-10-11 22:33:15 +0000406#endif /* __mem_pci */
407
408/*
409 * If this architecture has ISA IO, then define the isa_read/isa_write
410 * macros.
411 */
412#ifdef __mem_isa
413
414#define isa_readb(addr) __raw_readb(__mem_isa(addr))
415#define isa_readw(addr) __raw_readw(__mem_isa(addr))
416#define isa_readl(addr) __raw_readl(__mem_isa(addr))
417#define isa_writeb(val, addr) __raw_writeb(val, __mem_isa(addr))
418#define isa_writew(val, addr) __raw_writew(val, __mem_isa(addr))
419#define isa_writel(val, addr) __raw_writel(val, __mem_isa(addr))
420#define isa_memset_io(a, b, c) _memset_io(__mem_isa(a), (b), (c))
421#define isa_memcpy_fromio(a, b, c) _memcpy_fromio((a), __mem_isa(b), (c))
422#define isa_memcpy_toio(a, b, c) _memcpy_toio(__mem_isa((a)), (b), (c))
423
424#define isa_eth_io_copy_and_sum(a, b, c, d) \
425 eth_copy_and_sum((a), __mem_isa(b), (c), (d))
426
427static inline int
428isa_check_signature(unsigned long io_addr, const unsigned char *signature,
429 int length)
430{
431 int retval = 0;
432 do {
433 if (isa_readb(io_addr) != *signature)
434 goto out;
435 io_addr++;
436 signature++;
437 length--;
438 } while (length);
439 retval = 1;
440out:
441 return retval;
442}
443
444#else /* __mem_isa */
445
446#define isa_readb(addr) (__readwrite_bug("isa_readb"), 0)
447#define isa_readw(addr) (__readwrite_bug("isa_readw"), 0)
448#define isa_readl(addr) (__readwrite_bug("isa_readl"), 0)
449#define isa_writeb(val, addr) __readwrite_bug("isa_writeb")
450#define isa_writew(val, addr) __readwrite_bug("isa_writew")
451#define isa_writel(val, addr) __readwrite_bug("isa_writel")
452#define isa_memset_io(a, b, c) __readwrite_bug("isa_memset_io")
453#define isa_memcpy_fromio(a, b, c) __readwrite_bug("isa_memcpy_fromio")
454#define isa_memcpy_toio(a, b, c) __readwrite_bug("isa_memcpy_toio")
455
456#define isa_eth_io_copy_and_sum(a, b, c, d) \
457 __readwrite_bug("isa_eth_io_copy_and_sum")
458
459#define isa_check_signature(io, sig, len) (0)
460
461#endif /* __mem_isa */
462#endif /* __KERNEL__ */
463#endif /* __ASM_NDS_IO_H */