include/asm-h8300/io.h

   1 #ifndef _H8300_IO_H
   2 #define _H8300_IO_H
   3
   4 #ifdef __KERNEL__
   5
   6 #include <linux/config.h>
   7 #include <asm/virtconvert.h>
   8
   9 #if defined(CONFIG_H83007) || defined(CONFIG_H83068)
  10 #include <asm/regs306x.h>
  11 #elif defined(CONFIG_H8S2678)
  12 #include <asm/regs267x.h>
  13 #else
  14 #error UNKNOWN CPU TYPE
  15 #endif
  16
  17
  18 /*
  19  * These are for ISA/PCI shared memory _only_ and should never be used
  20  * on any other type of memory, including Zorro memory. They are meant to
  21  * access the bus in the bus byte order which is little-endian!.
  22  *
  23  * readX/writeX() are used to access memory mapped devices. On some
  24  * architectures the memory mapped IO stuff needs to be accessed
  25  * differently. On the m68k architecture, we just read/write the
  26  * memory location directly.
  27  */
  28 /* ++roman: The assignments to temp. vars avoid that gcc sometimes generates
  29  * two accesses to memory, which may be undesireable for some devices.
  30  */
  31
  32 /*
  33  * swap functions are sometimes needed to interface little-endian hardware
  34  */
  35
  36 static inline unsigned short _swapw(volatile unsigned short v)
  37 {
  38 #ifndef H8300_IO_NOSWAP
  39         unsigned short r;
  40         __asm__("xor.b %w0,%x0\n\t"
  41                 "xor.b %x0,%w0\n\t"
  42                 "xor.b %w0,%x0"
  43                 :"=r"(r)
  44                 :"0"(v));
  45         return r;
  46 #else
  47         return v;
  48 #endif
  49 }
  50
  51 static inline unsigned long _swapl(volatile unsigned long v)
  52 {
  53 #ifndef H8300_IO_NOSWAP
  54         unsigned long r;
  55         __asm__("xor.b %w0,%x0\n\t"
  56                 "xor.b %x0,%w0\n\t"
  57                 "xor.b %w0,%x0\n\t"
  58                 "xor.w %e0,%f0\n\t"
  59                 "xor.w %f0,%e0\n\t"
  60                 "xor.w %e0,%f0\n\t"
  61                 "xor.b %w0,%x0\n\t"
  62                 "xor.b %x0,%w0\n\t"
  63                 "xor.b %w0,%x0"
  64                 :"=r"(r)
  65                 :"0"(v));
  66         return r;
  67 #else
  68         return v;
  69 #endif
  70 }
  71
  72 #define readb(addr) \
  73     ({ unsigned char __v = \
  74      *(volatile unsigned char *)((unsigned long)(addr) & 0x00ffffff); \
  75      __v; })
  76 #define readw(addr) \
  77     ({ unsigned short __v = \
  78      *(volatile unsigned short *)((unsigned long)(addr) & 0x00ffffff); \
  79      __v; })
  80 #define readl(addr) \
  81     ({ unsigned long __v = \
  82      *(volatile unsigned long *)((unsigned long)(addr) & 0x00ffffff); \
  83      __v; })
  84
  85 #define writeb(b,addr) (void)((*(volatile unsigned char *) \
  86                              ((unsigned long)(addr) & 0x00ffffff)) = (b))
  87 #define writew(b,addr) (void)((*(volatile unsigned short *) \
  88                              ((unsigned long)(addr) & 0x00ffffff)) = (b))
  89 #define writel(b,addr) (void)((*(volatile unsigned long *) \
  90                              ((unsigned long)(addr) & 0x00ffffff)) = (b))
  91 #define readb_relaxed(addr) readb(addr)
  92 #define readw_relaxed(addr) readw(addr)
  93 #define readl_relaxed(addr) readl(addr)
  94
  95 #define __raw_readb readb
  96 #define __raw_readw readw
  97 #define __raw_readl readl
  98 #define __raw_writeb writeb
  99 #define __raw_writew writew
 100 #define __raw_writel writel
 101
 102 static inline int h8300_buswidth(unsigned int addr)
 103 {
 104         return (*(volatile unsigned char *)ABWCR & (1 << ((addr >> 21) & 7))) == 0;
 105 }
 106
 107 static inline void io_outsb(unsigned int addr, const void *buf, int len)
 108 {
 109         volatile unsigned char  *ap_b = (volatile unsigned char *) addr;
 110         volatile unsigned short *ap_w = (volatile unsigned short *) addr;
 111         unsigned char *bp = (unsigned char *) buf;
 112
 113         if(h8300_buswidth(addr) && (addr & 1)) {
 114                 while (len--)
 115                         *ap_w = *bp++;
 116         } else {
 117                 while (len--)
 118                         *ap_b = *bp++;
 119         }
 120 }
 121
 122 static inline void io_outsw(unsigned int addr, const void *buf, int len)
 123 {
 124         volatile unsigned short *ap = (volatile unsigned short *) addr;
 125         unsigned short *bp = (unsigned short *) buf;
 126         while (len--)
 127                 *ap = _swapw(*bp++);
 128 }
 129
 130 static inline void io_outsl(unsigned int addr, const void *buf, int len)
 131 {
 132         volatile unsigned long *ap = (volatile unsigned long *) addr;
 133         unsigned long *bp = (unsigned long *) buf;
 134         while (len--)
 135                 *ap = _swapl(*bp++);
 136 }
 137
 138 static inline void io_outsw_noswap(unsigned int addr, const void *buf, int len)
 139 {
 140         volatile unsigned short *ap = (volatile unsigned short *) addr;
 141         unsigned short *bp = (unsigned short *) buf;
 142         while (len--)
 143                 *ap = *bp++;
 144 }
 145
 146 static inline void io_outsl_noswap(unsigned int addr, const void *buf, int len)
 147 {
 148         volatile unsigned long *ap = (volatile unsigned long *) addr;
 149         unsigned long *bp = (unsigned long *) buf;
 150         while (len--)
 151                 *ap = *bp++;
 152 }
 153
 154 static inline void io_insb(unsigned int addr, void *buf, int len)
 155 {
 156         volatile unsigned char  *ap_b;
 157         volatile unsigned short *ap_w;
 158         unsigned char *bp = (unsigned char *) buf;
 159
 160         if(h8300_buswidth(addr)) {
 161                 ap_w = (volatile unsigned short *)(addr & ~1);
 162                 while (len--)
 163                         *bp++ = *ap_w & 0xff;
 164         } else {
 165                 ap_b = (volatile unsigned char *)addr;
 166                 while (len--)
 167                         *bp++ = *ap_b;
 168         }
 169 }
 170
 171 static inline void io_insw(unsigned int addr, void *buf, int len)
 172 {
 173         volatile unsigned short *ap = (volatile unsigned short *) addr;
 174         unsigned short *bp = (unsigned short *) buf;
 175         while (len--)
 176                 *bp++ = _swapw(*ap);
 177 }
 178
 179 static inline void io_insl(unsigned int addr, void *buf, int len)
 180 {
 181         volatile unsigned long *ap = (volatile unsigned long *) addr;
 182         unsigned long *bp = (unsigned long *) buf;
 183         while (len--)
 184                 *bp++ = _swapl(*ap);
 185 }
 186
 187 static inline void io_insw_noswap(unsigned int addr, void *buf, int len)
 188 {
 189         volatile unsigned short *ap = (volatile unsigned short *) addr;
 190         unsigned short *bp = (unsigned short *) buf;
 191         while (len--)
 192                 *bp++ = *ap;
 193 }
 194
 195 static inline void io_insl_noswap(unsigned int addr, void *buf, int len)
 196 {
 197         volatile unsigned long *ap = (volatile unsigned long *) addr;
 198         unsigned long *bp = (unsigned long *) buf;
 199         while (len--)
 200                 *bp++ = *ap;
 201 }
 202
 203 /*
 204  *      make the short names macros so specific devices
 205  *      can override them as required
 206  */
 207
 208 #define memset_io(a,b,c)        memset((void *)(a),(b),(c))
 209 #define memcpy_fromio(a,b,c)    memcpy((a),(void *)(b),(c))
 210 #define memcpy_toio(a,b,c)      memcpy((void *)(a),(b),(c))
 211
 212 #define mmiowb()
 213
 214 #define inb(addr)    ((h8300_buswidth(addr))?readw((addr) & ~1) & 0xff:readb(addr))
 215 #define inw(addr)    _swapw(readw(addr))
 216 #define inl(addr)    _swapl(readl(addr))
 217 #define outb(x,addr) ((void)((h8300_buswidth(addr) && \
 218                       ((addr) & 1))?writew(x,(addr) & ~1):writeb(x,addr)))
 219 #define outw(x,addr) ((void) writew(_swapw(x),addr))
 220 #define outl(x,addr) ((void) writel(_swapl(x),addr))
 221
 222 #define inb_p(addr)    inb(addr)
 223 #define inw_p(addr)    inw(addr)
 224 #define inl_p(addr)    inl(addr)
 225 #define outb_p(x,addr) outb(x,addr)
 226 #define outw_p(x,addr) outw(x,addr)
 227 #define outl_p(x,addr) outl(x,addr)
 228
 229 #define outsb(a,b,l) io_outsb(a,b,l)
 230 #define outsw(a,b,l) io_outsw(a,b,l)
 231 #define outsl(a,b,l) io_outsl(a,b,l)
 232
 233 #define insb(a,b,l) io_insb(a,b,l)
 234 #define insw(a,b,l) io_insw(a,b,l)
 235 #define insl(a,b,l) io_insl(a,b,l)
 236
 237 #define IO_SPACE_LIMIT 0xffffff
 238
 239
 240 /* Values for nocacheflag and cmode */
 241 #define IOMAP_FULL_CACHING              0
 242 #define IOMAP_NOCACHE_SER               1
 243 #define IOMAP_NOCACHE_NONSER            2
 244 #define IOMAP_WRITETHROUGH              3
 245
 246 extern void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag);
 247 extern void __iounmap(void *addr, unsigned long size);
 248
 249 static inline void *ioremap(unsigned long physaddr, unsigned long size)
 250 {
 251         return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
 252 }
 253 static inline void *ioremap_nocache(unsigned long physaddr, unsigned long size)
 254 {
 255         return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
 256 }
 257 static inline void *ioremap_writethrough(unsigned long physaddr, unsigned long size)
 258 {
 259         return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
 260 }
 261 static inline void *ioremap_fullcache(unsigned long physaddr, unsigned long size)
 262 {
 263         return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
 264 }
 265
 266 extern void iounmap(void *addr);
 267
 268 /* Nothing to do */
 269
 270 #define dma_cache_inv(_start,_size)             do { } while (0)
 271 #define dma_cache_wback(_start,_size)           do { } while (0)
 272 #define dma_cache_wback_inv(_start,_size)       do { } while (0)
 273
 274 /* H8/300 internal I/O functions */
 275 static __inline__ unsigned char ctrl_inb(unsigned long addr)
 276 {
 277         return *(volatile unsigned char*)addr;
 278 }
 279
 280 static __inline__ unsigned short ctrl_inw(unsigned long addr)
 281 {
 282         return *(volatile unsigned short*)addr;
 283 }
 284
 285 static __inline__ unsigned long ctrl_inl(unsigned long addr)
 286 {
 287         return *(volatile unsigned long*)addr;
 288 }
 289
 290 static __inline__ void ctrl_outb(unsigned char b, unsigned long addr)
 291 {
 292         *(volatile unsigned char*)addr = b;
 293 }
 294
 295 static __inline__ void ctrl_outw(unsigned short b, unsigned long addr)
 296 {
 297         *(volatile unsigned short*)addr = b;
 298 }
 299
 300 static __inline__ void ctrl_outl(unsigned long b, unsigned long addr)
 301 {
 302         *(volatile unsigned long*)addr = b;
 303 }
 304
 305 /* Pages to physical address... */
 306 #define page_to_phys(page)      ((page - mem_map) << PAGE_SHIFT)
 307 #define page_to_bus(page)       ((page - mem_map) << PAGE_SHIFT)
 308
 309 /*
 310  * Macros used for converting between virtual and physical mappings.
 311  */
 312 #define mm_ptov(vaddr)          ((void *) (vaddr))
 313 #define mm_vtop(vaddr)          ((unsigned long) (vaddr))
 314 #define phys_to_virt(vaddr)     ((void *) (vaddr))
 315 #define virt_to_phys(vaddr)     ((unsigned long) (vaddr))
 316
 317 #define virt_to_bus virt_to_phys
 318 #define bus_to_virt phys_to_virt
 319
 320 /*
 321  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 322  * access
 323  */
 324 #define xlate_dev_mem_ptr(p)    __va(p)
 325
 326 /*
 327  * Convert a virtual cached pointer to an uncached pointer
 328  */
 329 #define xlate_dev_kmem_ptr(p)   p
 330
 331 #endif /* __KERNEL__ */
 332
 333 #endif /* _H8300_IO_H */