LXR linux/arch/avr32/include/asm/io.h

   1#ifndef __ASM_AVR32_IO_H
   2#define __ASM_AVR32_IO_H
   3
   4#include <linux/bug.h>
   5#include <linux/kernel.h>
   6#include <linux/string.h>
   7#include <linux/types.h>
   8
   9#include <asm/addrspace.h>
  10#include <asm/byteorder.h>
  11
  12#include <mach/io.h>
  13
  14/* virt_to_phys will only work when address is in P1 or P2 */
  15static __inline__ unsigned long virt_to_phys(volatile void *address)
  16{
  17        return PHYSADDR(address);
  18}
  19
  20static __inline__ void * phys_to_virt(unsigned long address)
  21{
  22        return (void *)P1SEGADDR(address);
  23}
  24
  25#define cached_to_phys(addr)    ((unsigned long)PHYSADDR(addr))
  26#define uncached_to_phys(addr)  ((unsigned long)PHYSADDR(addr))
  27#define phys_to_cached(addr)    ((void *)P1SEGADDR(addr))
  28#define phys_to_uncached(addr)  ((void *)P2SEGADDR(addr))
  29
  30/*
  31 * Generic IO read/write.  These perform native-endian accesses.  Note
  32 * that some architectures will want to re-define __raw_{read,write}w.
  33 */
  34extern void __raw_writesb(void __iomem *addr, const void *data, int bytelen);
  35extern void __raw_writesw(void __iomem *addr, const void *data, int wordlen);
  36extern void __raw_writesl(void __iomem *addr, const void *data, int longlen);
  37
  38extern void __raw_readsb(const void __iomem *addr, void *data, int bytelen);
  39extern void __raw_readsw(const void __iomem *addr, void *data, int wordlen);
  40extern void __raw_readsl(const void __iomem *addr, void *data, int longlen);
  41
  42static inline void __raw_writeb(u8 v, volatile void __iomem *addr)
  43{
  44        *(volatile u8 __force *)addr = v;
  45}
  46static inline void __raw_writew(u16 v, volatile void __iomem *addr)
  47{
  48        *(volatile u16 __force *)addr = v;
  49}
  50static inline void __raw_writel(u32 v, volatile void __iomem *addr)
  51{
  52        *(volatile u32 __force *)addr = v;
  53}
  54
  55static inline u8 __raw_readb(const volatile void __iomem *addr)
  56{
  57        return *(const volatile u8 __force *)addr;
  58}
  59static inline u16 __raw_readw(const volatile void __iomem *addr)
  60{
  61        return *(const volatile u16 __force *)addr;
  62}
  63static inline u32 __raw_readl(const volatile void __iomem *addr)
  64{
  65        return *(const volatile u32 __force *)addr;
  66}
  67
  68/* Convert I/O port address to virtual address */
  69#ifndef __io
  70# define __io(p)        ((void *)phys_to_uncached(p))
  71#endif
  72
  73/*
  74 * Not really sure about the best way to slow down I/O on
  75 * AVR32. Defining it as a no-op until we have an actual test case.
  76 */
  77#define SLOW_DOWN_IO    do { } while (0)
  78
  79#define __BUILD_MEMORY_SINGLE(pfx, bwl, type)                           \
  80static inline void                                                      \
  81pfx##write##bwl(type val, volatile void __iomem *addr)                  \
  82{                                                                       \
  83        volatile type *__addr;                                          \
  84        type __val;                                                     \
  85                                                                        \
  86        __addr = (void *)__swizzle_addr_##bwl((unsigned long)(addr));   \
  87        __val = pfx##ioswab##bwl(__addr, val);                          \
  88                                                                        \
  89        BUILD_BUG_ON(sizeof(type) > sizeof(unsigned long));             \
  90                                                                        \
  91        *__addr = __val;                                                \
  92}                                                                       \
  93                                                                        \
  94static inline type pfx##read##bwl(const volatile void __iomem *addr)    \
  95{                                                                       \
  96        volatile type *__addr;                                          \
  97        type __val;                                                     \
  98                                                                        \
  99        __addr = (void *)__swizzle_addr_##bwl((unsigned long)(addr));   \
 100                                                                        \
 101        BUILD_BUG_ON(sizeof(type) > sizeof(unsigned long));             \
 102                                                                        \
 103        __val = *__addr;                                                \
 104        return pfx##ioswab##bwl(__addr, __val);                         \
 105}
 106
 107#define __BUILD_IOPORT_SINGLE(pfx, bwl, type, p, slow)                  \
 108static inline void pfx##out##bwl##p(type val, unsigned long port)       \
 109{                                                                       \
 110        volatile type *__addr;                                          \
 111        type __val;                                                     \
 112                                                                        \
 113        __addr = __io(__swizzle_addr_##bwl(port));                      \
 114        __val = pfx##ioswab##bwl(__addr, val);                          \
 115                                                                        \
 116        BUILD_BUG_ON(sizeof(type) > sizeof(unsigned long));             \
 117                                                                        \
 118        *__addr = __val;                                                \
 119        slow;                                                           \
 120}                                                                       \
 121                                                                        \
 122static inline type pfx##in##bwl##p(unsigned long port)                  \
 123{                                                                       \
 124        volatile type *__addr;                                          \
 125        type __val;                                                     \
 126                                                                        \
 127        __addr = __io(__swizzle_addr_##bwl(port));                      \
 128                                                                        \
 129        BUILD_BUG_ON(sizeof(type) > sizeof(unsigned long));             \
 130                                                                        \
 131        __val = *__addr;                                                \
 132        slow;                                                           \
 133                                                                        \
 134        return pfx##ioswab##bwl(__addr, __val);                         \
 135}
 136
 137#define __BUILD_MEMORY_PFX(bus, bwl, type)                              \
 138        __BUILD_MEMORY_SINGLE(bus, bwl, type)
 139
 140#define BUILDIO_MEM(bwl, type)                                          \
 141        __BUILD_MEMORY_PFX(, bwl, type)                                 \
 142        __BUILD_MEMORY_PFX(__mem_, bwl, type)
 143
 144#define __BUILD_IOPORT_PFX(bus, bwl, type)                              \
 145        __BUILD_IOPORT_SINGLE(bus, bwl, type, ,)                        \
 146        __BUILD_IOPORT_SINGLE(bus, bwl, type, _p, SLOW_DOWN_IO)
 147
 148#define BUILDIO_IOPORT(bwl, type)                                       \
 149        __BUILD_IOPORT_PFX(, bwl, type)                                 \
 150        __BUILD_IOPORT_PFX(__mem_, bwl, type)
 151
 152BUILDIO_MEM(b, u8)
 153BUILDIO_MEM(w, u16)
 154BUILDIO_MEM(l, u32)
 155
 156BUILDIO_IOPORT(b, u8)
 157BUILDIO_IOPORT(w, u16)
 158BUILDIO_IOPORT(l, u32)
 159
 160#define readb_relaxed                   readb
 161#define readw_relaxed                   readw
 162#define readl_relaxed                   readl
 163
 164#define readb_be                        __raw_readb
 165#define readw_be                        __raw_readw
 166#define readl_be                        __raw_readl
 167
 168#define writeb_relaxed                  writeb
 169#define writew_relaxed                  writew
 170#define writel_relaxed                  writel
 171
 172#define writeb_be                       __raw_writeb
 173#define writew_be                       __raw_writew
 174#define writel_be                       __raw_writel
 175
 176#define __BUILD_MEMORY_STRING(bwl, type)                                \
 177static inline void writes##bwl(volatile void __iomem *addr,             \
 178                               const void *data, unsigned int count)    \
 179{                                                                       \
 180        const type *__data = data;                                      \
 181                                                                        \
 182        while (count--)                                                 \
 183                __mem_write##bwl(*__data++, addr);                      \
 184}                                                                       \
 185                                                                        \
 186static inline void reads##bwl(const volatile void __iomem *addr,        \
 187                              void *data, unsigned int count)           \
 188{                                                                       \
 189        type *__data = data;                                            \
 190                                                                        \
 191        while (count--)                                                 \
 192                *__data++ = __mem_read##bwl(addr);                      \
 193}
 194
 195#define __BUILD_IOPORT_STRING(bwl, type)                                \
 196static inline void outs##bwl(unsigned long port, const void *data,      \
 197                             unsigned int count)                        \
 198{                                                                       \
 199        const type *__data = data;                                      \
 200                                                                        \
 201        while (count--)                                                 \
 202                __mem_out##bwl(*__data++, port);                        \
 203}                                                                       \
 204                                                                        \
 205static inline void ins##bwl(unsigned long port, void *data,             \
 206                           unsigned int count)                          \
 207{                                                                       \
 208        type *__data = data;                                            \
 209                                                                        \
 210        while (count--)                                                 \
 211                *__data++ = __mem_in##bwl(port);                        \
 212}
 213
 214#define BUILDSTRING(bwl, type)                                          \
 215        __BUILD_MEMORY_STRING(bwl, type)                                \
 216        __BUILD_IOPORT_STRING(bwl, type)
 217
 218BUILDSTRING(b, u8)
 219BUILDSTRING(w, u16)
 220BUILDSTRING(l, u32)
 221
 222/*
 223 * io{read,write}{8,16,32} macros in both le (for PCI style consumers) and native be
 224 */
 225#ifndef ioread8
 226
 227#define ioread8(p)              ((unsigned int)readb(p))
 228
 229#define ioread16(p)             ((unsigned int)readw(p))
 230#define ioread16be(p)           ((unsigned int)__raw_readw(p))
 231
 232#define ioread32(p)             ((unsigned int)readl(p))
 233#define ioread32be(p)           ((unsigned int)__raw_readl(p))
 234
 235#define iowrite8(v,p)           writeb(v, p)
 236
 237#define iowrite16(v,p)          writew(v, p)
 238#define iowrite16be(v,p)        __raw_writew(v, p)
 239
 240#define iowrite32(v,p)          writel(v, p)
 241#define iowrite32be(v,p)        __raw_writel(v, p)
 242
 243#define ioread8_rep(p,d,c)      readsb(p,d,c)
 244#define ioread16_rep(p,d,c)     readsw(p,d,c)
 245#define ioread32_rep(p,d,c)     readsl(p,d,c)
 246
 247#define iowrite8_rep(p,s,c)     writesb(p,s,c)
 248#define iowrite16_rep(p,s,c)    writesw(p,s,c)
 249#define iowrite32_rep(p,s,c)    writesl(p,s,c)
 250
 251#endif
 252
 253static inline void memcpy_fromio(void * to, const volatile void __iomem *from,
 254                                 unsigned long count)
 255{
 256        memcpy(to, (const void __force *)from, count);
 257}
 258
 259static inline void  memcpy_toio(volatile void __iomem *to, const void * from,
 260                                unsigned long count)
 261{
 262        memcpy((void __force *)to, from, count);
 263}
 264
 265static inline void memset_io(volatile void __iomem *addr, unsigned char val,
 266                             unsigned long count)
 267{
 268        memset((void __force *)addr, val, count);
 269}
 270
 271#define mmiowb()
 272
 273#define IO_SPACE_LIMIT  0xffffffff
 274
 275extern void __iomem *__ioremap(unsigned long offset, size_t size,
 276                               unsigned long flags);
 277extern void __iounmap(void __iomem *addr);
 278
 279/*
 280 * ioremap      -   map bus memory into CPU space
 281 * @offset      bus address of the memory
 282 * @size        size of the resource to map
 283 *
 284 * ioremap performs a platform specific sequence of operations to make
 285 * bus memory CPU accessible via the readb/.../writel functions and
 286 * the other mmio helpers. The returned address is not guaranteed to
 287 * be usable directly as a virtual address.
 288 */
 289#define ioremap(offset, size)                   \
 290        __ioremap((offset), (size), 0)
 291
 292#define ioremap_nocache(offset, size)           \
 293        __ioremap((offset), (size), 0)
 294
 295#define iounmap(addr)                           \
 296        __iounmap(addr)
 297
 298#define ioremap_wc ioremap_nocache
 299
 300#define cached(addr) P1SEGADDR(addr)
 301#define uncached(addr) P2SEGADDR(addr)
 302
 303#define virt_to_bus virt_to_phys
 304#define bus_to_virt phys_to_virt
 305#define page_to_bus page_to_phys
 306#define bus_to_page phys_to_page
 307
 308/*
 309 * Create a virtual mapping cookie for an IO port range.  There exists
 310 * no such thing as port-based I/O on AVR32, so a regular ioremap()
 311 * should do what we need.
 312 */
 313#define ioport_map(port, nr)    ioremap(port, nr)
 314#define ioport_unmap(port)      iounmap(port)
 315
 316/*
 317 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 318 * access
 319 */
 320#define xlate_dev_mem_ptr(p)    __va(p)
 321
 322/*
 323 * Convert a virtual cached pointer to an uncached pointer
 324 */
 325#define xlate_dev_kmem_ptr(p)   p
 326
 327#endif /* __ASM_AVR32_IO_H */
 328