1 /*
2  * linux/include/asm-m68k/io.h
3  *
4  * 4/1/00 RZ: - rewritten to avoid clashes between ISA/PCI and other
5  *              IO access
6  *            - added Q40 support
7  *            - added skeleton for GG-II and Amiga PCMCIA
8  * 2/3/01 RZ: - moved a few more defs into raw_io.h
9  *
10  * inX/outX should not be used by any driver unless it does
11  * ISA access. Other drivers should use function defined in raw_io.h
12  * or define its own macros on top of these.
13  *
14  *    inX(),outX()              are for ISA I/O
15  *    isa_readX(),isa_writeX()  are for ISA memory
16  */
17 
18 #ifndef _IO_H
19 #define _IO_H
20 
21 #ifdef __KERNEL__
22 
23 #include <linux/compiler.h>
24 #include <asm/raw_io.h>
25 #include <asm/virtconvert.h>
26 
27 #include <asm-generic/iomap.h>
28 
29 #ifdef CONFIG_ATARI
30 #include <asm/atarihw.h>
31 #endif
32 
33 
34 /*
35  * IO/MEM definitions for various ISA bridges
36  */
37 
38 
39 #ifdef CONFIG_Q40
40 
41 #define q40_isa_io_base  0xff400000
42 #define q40_isa_mem_base 0xff800000
43 
44 #define Q40_ISA_IO_B(ioaddr) (q40_isa_io_base+1+4*((unsigned long)(ioaddr)))
45 #define Q40_ISA_IO_W(ioaddr) (q40_isa_io_base+  4*((unsigned long)(ioaddr)))
46 #define Q40_ISA_MEM_B(madr)  (q40_isa_mem_base+1+4*((unsigned long)(madr)))
47 #define Q40_ISA_MEM_W(madr)  (q40_isa_mem_base+  4*((unsigned long)(madr)))
48 
49 #define MULTI_ISA 0
50 #endif /* Q40 */
51 
52 #ifdef CONFIG_AMIGA_PCMCIA
53 #include <asm/amigayle.h>
54 
55 #define AG_ISA_IO_B(ioaddr) ( GAYLE_IO+(ioaddr)+(((ioaddr)&1)*GAYLE_ODD) )
56 #define AG_ISA_IO_W(ioaddr) ( GAYLE_IO+(ioaddr) )
57 
58 #ifndef MULTI_ISA
59 #define MULTI_ISA 0
60 #else
61 #undef MULTI_ISA
62 #define MULTI_ISA 1
63 #endif
64 #endif /* AMIGA_PCMCIA */
65 
66 
67 
68 #ifdef CONFIG_ISA
69 
70 #if MULTI_ISA == 0
71 #undef MULTI_ISA
72 #endif
73 
74 #define ISA_TYPE_Q40 (1)
75 #define ISA_TYPE_AG  (2)
76 
77 #if defined(CONFIG_Q40) && !defined(MULTI_ISA)
78 #define ISA_TYPE ISA_TYPE_Q40
79 #define ISA_SEX  0
80 #endif
81 #if defined(CONFIG_AMIGA_PCMCIA) && !defined(MULTI_ISA)
82 #define ISA_TYPE ISA_TYPE_AG
83 #define ISA_SEX  1
84 #endif
85 
86 #ifdef MULTI_ISA
87 extern int isa_type;
88 extern int isa_sex;
89 
90 #define ISA_TYPE isa_type
91 #define ISA_SEX  isa_sex
92 #endif
93 
94 /*
95  * define inline addr translation functions. Normally only one variant will
96  * be compiled in so the case statement will be optimised away
97  */
98 
isa_itb(unsigned long addr)99 static inline u8 __iomem *isa_itb(unsigned long addr)
100 {
101   switch(ISA_TYPE)
102     {
103 #ifdef CONFIG_Q40
104     case ISA_TYPE_Q40: return (u8 __iomem *)Q40_ISA_IO_B(addr);
105 #endif
106 #ifdef CONFIG_AMIGA_PCMCIA
107     case ISA_TYPE_AG: return (u8 __iomem *)AG_ISA_IO_B(addr);
108 #endif
109     default: return NULL; /* avoid warnings, just in case */
110     }
111 }
isa_itw(unsigned long addr)112 static inline u16 __iomem *isa_itw(unsigned long addr)
113 {
114   switch(ISA_TYPE)
115     {
116 #ifdef CONFIG_Q40
117     case ISA_TYPE_Q40: return (u16 __iomem *)Q40_ISA_IO_W(addr);
118 #endif
119 #ifdef CONFIG_AMIGA_PCMCIA
120     case ISA_TYPE_AG: return (u16 __iomem *)AG_ISA_IO_W(addr);
121 #endif
122     default: return NULL; /* avoid warnings, just in case */
123     }
124 }
isa_itl(unsigned long addr)125 static inline u32 __iomem *isa_itl(unsigned long addr)
126 {
127   switch(ISA_TYPE)
128     {
129 #ifdef CONFIG_AMIGA_PCMCIA
130     case ISA_TYPE_AG: return (u32 __iomem *)AG_ISA_IO_W(addr);
131 #endif
132     default: return 0; /* avoid warnings, just in case */
133     }
134 }
isa_mtb(unsigned long addr)135 static inline u8 __iomem *isa_mtb(unsigned long addr)
136 {
137   switch(ISA_TYPE)
138     {
139 #ifdef CONFIG_Q40
140     case ISA_TYPE_Q40: return (u8 __iomem *)Q40_ISA_MEM_B(addr);
141 #endif
142 #ifdef CONFIG_AMIGA_PCMCIA
143     case ISA_TYPE_AG: return (u8 __iomem *)addr;
144 #endif
145     default: return NULL; /* avoid warnings, just in case */
146     }
147 }
isa_mtw(unsigned long addr)148 static inline u16 __iomem *isa_mtw(unsigned long addr)
149 {
150   switch(ISA_TYPE)
151     {
152 #ifdef CONFIG_Q40
153     case ISA_TYPE_Q40: return (u16 __iomem *)Q40_ISA_MEM_W(addr);
154 #endif
155 #ifdef CONFIG_AMIGA_PCMCIA
156     case ISA_TYPE_AG: return (u16 __iomem *)addr;
157 #endif
158     default: return NULL; /* avoid warnings, just in case */
159     }
160 }
161 
162 
163 #define isa_inb(port)      in_8(isa_itb(port))
164 #define isa_inw(port)      (ISA_SEX ? in_be16(isa_itw(port)) : in_le16(isa_itw(port)))
165 #define isa_inl(port)      (ISA_SEX ? in_be32(isa_itl(port)) : in_le32(isa_itl(port)))
166 #define isa_outb(val,port) out_8(isa_itb(port),(val))
167 #define isa_outw(val,port) (ISA_SEX ? out_be16(isa_itw(port),(val)) : out_le16(isa_itw(port),(val)))
168 #define isa_outl(val,port) (ISA_SEX ? out_be32(isa_itl(port),(val)) : out_le32(isa_itl(port),(val)))
169 
170 #define isa_readb(p)       in_8(isa_mtb((unsigned long)(p)))
171 #define isa_readw(p)       \
172 	(ISA_SEX ? in_be16(isa_mtw((unsigned long)(p)))	\
173 		 : in_le16(isa_mtw((unsigned long)(p))))
174 #define isa_writeb(val,p)  out_8(isa_mtb((unsigned long)(p)),(val))
175 #define isa_writew(val,p)  \
176 	(ISA_SEX ? out_be16(isa_mtw((unsigned long)(p)),(val))	\
177 		 : out_le16(isa_mtw((unsigned long)(p)),(val)))
178 
isa_delay(void)179 static inline void isa_delay(void)
180 {
181   switch(ISA_TYPE)
182     {
183 #ifdef CONFIG_Q40
184     case ISA_TYPE_Q40: isa_outb(0,0x80); break;
185 #endif
186 #ifdef CONFIG_AMIGA_PCMCIA
187     case ISA_TYPE_AG: break;
188 #endif
189     default: break; /* avoid warnings */
190     }
191 }
192 
193 #define isa_inb_p(p)      ({u8 v=isa_inb(p);isa_delay();v;})
194 #define isa_outb_p(v,p)   ({isa_outb((v),(p));isa_delay();})
195 #define isa_inw_p(p)      ({u16 v=isa_inw(p);isa_delay();v;})
196 #define isa_outw_p(v,p)   ({isa_outw((v),(p));isa_delay();})
197 #define isa_inl_p(p)      ({u32 v=isa_inl(p);isa_delay();v;})
198 #define isa_outl_p(v,p)   ({isa_outl((v),(p));isa_delay();})
199 
200 #define isa_insb(port, buf, nr) raw_insb(isa_itb(port), (u8 *)(buf), (nr))
201 #define isa_outsb(port, buf, nr) raw_outsb(isa_itb(port), (u8 *)(buf), (nr))
202 
203 #define isa_insw(port, buf, nr)     \
204        (ISA_SEX ? raw_insw(isa_itw(port), (u16 *)(buf), (nr)) :    \
205                   raw_insw_swapw(isa_itw(port), (u16 *)(buf), (nr)))
206 
207 #define isa_outsw(port, buf, nr)    \
208        (ISA_SEX ? raw_outsw(isa_itw(port), (u16 *)(buf), (nr)) :  \
209                   raw_outsw_swapw(isa_itw(port), (u16 *)(buf), (nr)))
210 
211 #define isa_insl(port, buf, nr)     \
212        (ISA_SEX ? raw_insl(isa_itl(port), (u32 *)(buf), (nr)) :    \
213                   raw_insw_swapw(isa_itw(port), (u16 *)(buf), (nr)<<1))
214 
215 #define isa_outsl(port, buf, nr)    \
216        (ISA_SEX ? raw_outsl(isa_itl(port), (u32 *)(buf), (nr)) :  \
217                   raw_outsw_swapw(isa_itw(port), (u16 *)(buf), (nr)<<1))
218 
219 
220 #define inb     isa_inb
221 #define inb_p   isa_inb_p
222 #define outb    isa_outb
223 #define outb_p  isa_outb_p
224 #define inw     isa_inw
225 #define inw_p   isa_inw_p
226 #define outw    isa_outw
227 #define outw_p  isa_outw_p
228 #define inl     isa_inl
229 #define inl_p   isa_inl_p
230 #define outl    isa_outl
231 #define outl_p  isa_outl_p
232 #define insb    isa_insb
233 #define insw    isa_insw
234 #define insl    isa_insl
235 #define outsb   isa_outsb
236 #define outsw   isa_outsw
237 #define outsl   isa_outsl
238 #define readb   isa_readb
239 #define readw   isa_readw
240 #define writeb  isa_writeb
241 #define writew  isa_writew
242 
243 #else  /* CONFIG_ISA */
244 
245 /*
246  * We need to define dummy functions for GENERIC_IOMAP support.
247  */
248 #define inb(port)          0xff
249 #define inb_p(port)        0xff
250 #define outb(val,port)     ((void)0)
251 #define outb_p(val,port)   ((void)0)
252 #define inw(port)          0xffff
253 #define inw_p(port)        0xffff
254 #define outw(val,port)     ((void)0)
255 #define outw_p(val,port)   ((void)0)
256 #define inl(port)          0xffffffffUL
257 #define inl_p(port)        0xffffffffUL
258 #define outl(val,port)     ((void)0)
259 #define outl_p(val,port)   ((void)0)
260 
261 #define insb(port,buf,nr)  ((void)0)
262 #define outsb(port,buf,nr) ((void)0)
263 #define insw(port,buf,nr)  ((void)0)
264 #define outsw(port,buf,nr) ((void)0)
265 #define insl(port,buf,nr)  ((void)0)
266 #define outsl(port,buf,nr) ((void)0)
267 
268 /*
269  * These should be valid on any ioremap()ed region
270  */
271 #define readb(addr)      in_8(addr)
272 #define writeb(val,addr) out_8((addr),(val))
273 #define readw(addr)      in_le16(addr)
274 #define writew(val,addr) out_le16((addr),(val))
275 
276 #endif /* CONFIG_ISA */
277 
278 #define readl(addr)      in_le32(addr)
279 #define writel(val,addr) out_le32((addr),(val))
280 
281 #define mmiowb()
282 
ioremap(unsigned long physaddr,unsigned long size)283 static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size)
284 {
285 	return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
286 }
ioremap_nocache(unsigned long physaddr,unsigned long size)287 static inline void __iomem *ioremap_nocache(unsigned long physaddr, unsigned long size)
288 {
289 	return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
290 }
ioremap_writethrough(unsigned long physaddr,unsigned long size)291 static inline void __iomem *ioremap_writethrough(unsigned long physaddr,
292 					 unsigned long size)
293 {
294 	return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
295 }
ioremap_fullcache(unsigned long physaddr,unsigned long size)296 static inline void __iomem *ioremap_fullcache(unsigned long physaddr,
297 				      unsigned long size)
298 {
299 	return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
300 }
301 
memset_io(volatile void __iomem * addr,unsigned char val,int count)302 static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count)
303 {
304 	__builtin_memset((void __force *) addr, val, count);
305 }
memcpy_fromio(void * dst,const volatile void __iomem * src,int count)306 static inline void memcpy_fromio(void *dst, const volatile void __iomem *src, int count)
307 {
308 	__builtin_memcpy(dst, (void __force *) src, count);
309 }
memcpy_toio(volatile void __iomem * dst,const void * src,int count)310 static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int count)
311 {
312 	__builtin_memcpy((void __force *) dst, src, count);
313 }
314 
315 #ifndef CONFIG_SUN3
316 #define IO_SPACE_LIMIT 0xffff
317 #else
318 #define IO_SPACE_LIMIT 0x0fffffff
319 #endif
320 
321 #endif /* __KERNEL__ */
322 
323 #define __ARCH_HAS_NO_PAGE_ZERO_MAPPED		1
324 
325 /*
326  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
327  * access
328  */
329 #define xlate_dev_mem_ptr(p)	__va(p)
330 
331 /*
332  * Convert a virtual cached pointer to an uncached pointer
333  */
334 #define xlate_dev_kmem_ptr(p)	p
335 
336 #endif /* _IO_H */
337