| 1 | /* |
| 2 | * arch/ubicom32/include/asm/io.h |
| 3 | * I/O memory accessor functions for Ubicom32 architecture. |
| 4 | * |
| 5 | * (C) Copyright 2009, Ubicom, Inc. |
| 6 | * |
| 7 | * This file is part of the Ubicom32 Linux Kernel Port. |
| 8 | * |
| 9 | * The Ubicom32 Linux Kernel Port is free software: you can redistribute |
| 10 | * it and/or modify it under the terms of the GNU General Public License |
| 11 | * as published by the Free Software Foundation, either version 2 of the |
| 12 | * License, or (at your option) any later version. |
| 13 | * |
| 14 | * The Ubicom32 Linux Kernel Port is distributed in the hope that it |
| 15 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied |
| 16 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 17 | * the GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with the Ubicom32 Linux Kernel Port. If not, |
| 21 | * see <http://www.gnu.org/licenses/>. |
| 22 | * |
| 23 | * Ubicom32 implementation derived from (with many thanks): |
| 24 | * arch/m68knommu |
| 25 | * arch/blackfin |
| 26 | * arch/parisc |
| 27 | */ |
| 28 | #ifndef _ASM_UBICOM32_IO_H |
| 29 | #define _ASM_UBICOM32_IO_H |
| 30 | |
| 31 | #ifdef __KERNEL__ |
| 32 | #include <linux/string.h> |
| 33 | #include <linux/compiler.h> |
| 34 | |
| 35 | static inline unsigned short _swapw(volatile unsigned short v) |
| 36 | { |
| 37 | return ((v << 8) | (v >> 8)); |
| 38 | } |
| 39 | |
| 40 | static inline unsigned int _swapl(volatile unsigned long v) |
| 41 | { |
| 42 | return ((v << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | (v >> 24)); |
| 43 | } |
| 44 | |
| 45 | #ifndef CONFIG_PCI |
| 46 | #define readb(addr) \ |
| 47 | ({ unsigned char __v = (*(volatile unsigned char *) (addr)); __v; }) |
| 48 | #define readw(addr) \ |
| 49 | ({ unsigned short __v = (*(volatile unsigned short *) (addr)); __v; }) |
| 50 | #define readl(addr) \ |
| 51 | ({ unsigned int __v = (*(volatile unsigned int *) (addr)); __v; }) |
| 52 | |
| 53 | #define writeb(b,addr) (void)((*(volatile unsigned char *) (addr)) = (b)) |
| 54 | #define writew(b,addr) (void)((*(volatile unsigned short *) (addr)) = (b)) |
| 55 | #define writel(b,addr) (void)((*(volatile unsigned int *) (addr)) = (b)) |
| 56 | #else /*CONFIG_PCI */ |
| 57 | |
| 58 | #define PCI_CPU_REG_BASE (0x00000000UL) /* taking lower 2GB space */ |
| 59 | #define PCI_DEV_REG_BASE (0x80000000UL) |
| 60 | |
| 61 | #if PCI_CPU_REG_BASE > PCI_DEV_REG_BASE |
| 62 | #define IS_PCI_ADDRESS(x) (((unsigned int)(x)&(PCI_CPU_REG_BASE)) == 0) |
| 63 | #else |
| 64 | #define IS_PCI_ADDRESS(x) ((unsigned int)(x)&(PCI_DEV_REG_BASE)) |
| 65 | #endif |
| 66 | |
| 67 | extern unsigned int ubi32_pci_read_u32(const volatile void __iomem *addr); |
| 68 | extern unsigned short ubi32_pci_read_u16(const volatile void __iomem *addr); |
| 69 | extern unsigned char ubi32_pci_read_u8(const volatile void __iomem *addr); |
| 70 | extern void ubi32_pci_write_u32(unsigned int val, const volatile void __iomem *addr); |
| 71 | extern void ubi32_pci_write_u16(unsigned short val, const volatile void __iomem *addr); |
| 72 | extern void ubi32_pci_write_u8(unsigned char val, const volatile void __iomem *addr); |
| 73 | |
| 74 | static inline unsigned char readb(const volatile void __iomem *addr) |
| 75 | { |
| 76 | if (IS_PCI_ADDRESS(addr)) |
| 77 | return ubi32_pci_read_u8(addr); |
| 78 | else |
| 79 | return (unsigned char)(*(volatile unsigned char *)addr); |
| 80 | } |
| 81 | static inline unsigned short readw(const volatile void __iomem *addr) |
| 82 | { |
| 83 | if (IS_PCI_ADDRESS(addr)) |
| 84 | return ubi32_pci_read_u16(addr); |
| 85 | else |
| 86 | return (unsigned short)(*(volatile unsigned short *)addr); |
| 87 | } |
| 88 | |
| 89 | static inline unsigned int readl(const volatile void __iomem *addr) |
| 90 | { |
| 91 | if (IS_PCI_ADDRESS(addr)) |
| 92 | return ubi32_pci_read_u32(addr); |
| 93 | else |
| 94 | return (unsigned int)(*(volatile unsigned int *)addr); |
| 95 | } |
| 96 | |
| 97 | static inline void writel(unsigned int val, volatile void __iomem *addr) |
| 98 | { |
| 99 | if (IS_PCI_ADDRESS(addr)) |
| 100 | ubi32_pci_write_u32(val, addr); |
| 101 | else |
| 102 | *(volatile unsigned int *)addr = val; |
| 103 | } |
| 104 | |
| 105 | static inline void writew(unsigned short val, volatile void __iomem *addr) |
| 106 | { |
| 107 | if (IS_PCI_ADDRESS(addr)) |
| 108 | ubi32_pci_write_u16(val, addr); |
| 109 | else |
| 110 | *(volatile unsigned short *)addr = val; |
| 111 | } |
| 112 | |
| 113 | static inline void writeb(unsigned char val, volatile void __iomem *addr) |
| 114 | { |
| 115 | if (IS_PCI_ADDRESS(addr)) |
| 116 | ubi32_pci_write_u8(val, addr); |
| 117 | else |
| 118 | *(volatile unsigned char *)addr = val; |
| 119 | } |
| 120 | #endif |
| 121 | |
| 122 | #define readb_relaxed(addr) readb(addr) |
| 123 | #define readw_relaxed(addr) readw(addr) |
| 124 | #define readl_relaxed(addr) readl(addr) |
| 125 | |
| 126 | |
| 127 | #define __raw_readb readb |
| 128 | #define __raw_readw readw |
| 129 | #define __raw_readl readl |
| 130 | #define __raw_writeb writeb |
| 131 | #define __raw_writew writew |
| 132 | #define __raw_writel writel |
| 133 | |
| 134 | static inline void io_outsb(unsigned int addr, const void *buf, int len) |
| 135 | { |
| 136 | volatile unsigned char *ap = (volatile unsigned char *) addr; |
| 137 | unsigned char *bp = (unsigned char *) buf; |
| 138 | while (len--) |
| 139 | *ap = *bp++; |
| 140 | } |
| 141 | |
| 142 | static inline void io_outsw(unsigned int addr, const void *buf, int len) |
| 143 | { |
| 144 | volatile unsigned short *ap = (volatile unsigned short *) addr; |
| 145 | unsigned short *bp = (unsigned short *) buf; |
| 146 | while (len--) |
| 147 | *ap = _swapw(*bp++); |
| 148 | } |
| 149 | |
| 150 | static inline void io_outsl(unsigned int addr, const void *buf, int len) |
| 151 | { |
| 152 | volatile unsigned int *ap = (volatile unsigned int *) addr; |
| 153 | unsigned int *bp = (unsigned int *) buf; |
| 154 | while (len--) |
| 155 | *ap = _swapl(*bp++); |
| 156 | } |
| 157 | |
| 158 | static inline void io_insb(unsigned int addr, void *buf, int len) |
| 159 | { |
| 160 | volatile unsigned char *ap = (volatile unsigned char *) addr; |
| 161 | unsigned char *bp = (unsigned char *) buf; |
| 162 | while (len--) |
| 163 | *bp++ = *ap; |
| 164 | } |
| 165 | |
| 166 | static inline void io_insw(unsigned int addr, void *buf, int len) |
| 167 | { |
| 168 | volatile unsigned short *ap = (volatile unsigned short *) addr; |
| 169 | unsigned short *bp = (unsigned short *) buf; |
| 170 | while (len--) |
| 171 | *bp++ = _swapw(*ap); |
| 172 | } |
| 173 | |
| 174 | static inline void io_insl(unsigned int addr, void *buf, int len) |
| 175 | { |
| 176 | volatile unsigned int *ap = (volatile unsigned int *) addr; |
| 177 | unsigned int *bp = (unsigned int *) buf; |
| 178 | while (len--) |
| 179 | *bp++ = _swapl(*ap); |
| 180 | } |
| 181 | |
| 182 | #define mmiowb() |
| 183 | |
| 184 | /* |
| 185 | * make the short names macros so specific devices |
| 186 | * can override them as required |
| 187 | */ |
| 188 | #ifndef CONFIG_PCI |
| 189 | #define memset_io(a,b,c) memset((void *)(a),(b),(c)) |
| 190 | #define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c)) |
| 191 | #define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c)) |
| 192 | #else |
| 193 | extern void memcpy_fromio(void *to, const volatile void __iomem *from, unsigned len); |
| 194 | extern void memcpy_toio(volatile void __iomem *to, const void *from, unsigned len); |
| 195 | extern void memset_io(volatile void __iomem *addr, int val, size_t count); |
| 196 | #endif |
| 197 | |
| 198 | #define inb(addr) readb(addr) |
| 199 | #define inw(addr) readw(addr) |
| 200 | #define inl(addr) readl(addr) |
| 201 | #define outb(x,addr) ((void) writeb(x,addr)) |
| 202 | #define outw(x,addr) ((void) writew(x,addr)) |
| 203 | #define outl(x,addr) ((void) writel(x,addr)) |
| 204 | |
| 205 | #define inb_p(addr) inb(addr) |
| 206 | #define inw_p(addr) inw(addr) |
| 207 | #define inl_p(addr) inl(addr) |
| 208 | #define outb_p(x,addr) outb(x,addr) |
| 209 | #define outw_p(x,addr) outw(x,addr) |
| 210 | #define outl_p(x,addr) outl(x,addr) |
| 211 | |
| 212 | #define outsb(a,b,l) io_outsb(a,b,l) |
| 213 | #define outsw(a,b,l) io_outsw(a,b,l) |
| 214 | #define outsl(a,b,l) io_outsl(a,b,l) |
| 215 | |
| 216 | #define insb(a,b,l) io_insb(a,b,l) |
| 217 | #define insw(a,b,l) io_insw(a,b,l) |
| 218 | #define insl(a,b,l) io_insl(a,b,l) |
| 219 | |
| 220 | #ifndef CONFIG_PCI |
| 221 | #define ioread8_rep(a,d,c) insb(a,d,c) |
| 222 | #define ioread16_rep(a,d,c) insw(a,d,c) |
| 223 | #define ioread32_rep(a,d,c) insl(a,d,c) |
| 224 | #define iowrite8_rep(a,s,c) outsb(a,s,c) |
| 225 | #define iowrite16_rep(a,s,c) outsw(a,s,c) |
| 226 | #define iowrite32_rep(a,s,c) outsl(a,s,c) |
| 227 | #else |
| 228 | extern void ioread8_rep(void __iomem *port, void *buf, unsigned long count); |
| 229 | extern void ioread16_rep(void __iomem *port, void *buf, unsigned long count); |
| 230 | extern void ioread32_rep(void __iomem *port, void *buf, unsigned long count); |
| 231 | extern void iowrite8_rep(void __iomem *port, const void *buf, unsigned long count); |
| 232 | extern void iowrite16_rep(void __iomem *port, const void *buf, unsigned long count); |
| 233 | extern void iowrite32_rep(void __iomem *port, const void *buf, unsigned long count); |
| 234 | #endif |
| 235 | |
| 236 | |
| 237 | #ifndef CONFIG_PCI |
| 238 | #define ioread8(X) readb(X) |
| 239 | #define ioread16(X) readw(X) |
| 240 | #define ioread32(X) readl(X) |
| 241 | #define iowrite8(val,X) writeb(val,X) |
| 242 | #define iowrite16(val,X) writew(val,X) |
| 243 | #define iowrite32(val,X) writel(val,X) |
| 244 | #else /*CONFIG_PCI */ |
| 245 | extern unsigned char ioread8(void __iomem *addr); |
| 246 | extern unsigned short ioread16(void __iomem *addr); |
| 247 | extern unsigned int ioread32(void __iomem *addr); |
| 248 | extern void iowrite8(unsigned char val, void __iomem *addr); |
| 249 | extern void iowrite16(unsigned short val, void __iomem *addr); |
| 250 | extern void iowrite32(unsigned int val, void __iomem *addr); |
| 251 | #endif /* CONFIG_PCI */ |
| 252 | |
| 253 | #define IO_SPACE_LIMIT 0xffff |
| 254 | |
| 255 | /* Values for nocacheflag and cmode */ |
| 256 | #define IOMAP_FULL_CACHING 0 |
| 257 | #define IOMAP_NOCACHE_SER 1 |
| 258 | #define IOMAP_NOCACHE_NONSER 2 |
| 259 | #define IOMAP_WRITETHROUGH 3 |
| 260 | |
| 261 | extern void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag); |
| 262 | extern void __iounmap(void *addr, unsigned long size); |
| 263 | |
| 264 | static inline void *ioremap(unsigned long physaddr, unsigned long size) |
| 265 | { |
| 266 | return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); |
| 267 | } |
| 268 | static inline void *ioremap_nocache(unsigned long physaddr, unsigned long size) |
| 269 | { |
| 270 | return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); |
| 271 | } |
| 272 | static inline void *ioremap_writethrough(unsigned long physaddr, unsigned long size) |
| 273 | { |
| 274 | return __ioremap(physaddr, size, IOMAP_WRITETHROUGH); |
| 275 | } |
| 276 | static inline void *ioremap_fullcache(unsigned long physaddr, unsigned long size) |
| 277 | { |
| 278 | return __ioremap(physaddr, size, IOMAP_FULL_CACHING); |
| 279 | } |
| 280 | |
| 281 | extern void iounmap(void *addr); |
| 282 | |
| 283 | #define ioport_map(port, nr) ((void __iomem*)(port)) |
| 284 | #define ioport_unmap(addr) |
| 285 | |
| 286 | |
| 287 | /* Pages to physical address... */ |
| 288 | #define page_to_phys(page) ((page - mem_map) << PAGE_SHIFT) |
| 289 | #define page_to_bus(page) ((page - mem_map) << PAGE_SHIFT) |
| 290 | |
| 291 | /* |
| 292 | * Macros used for converting between virtual and physical mappings. |
| 293 | */ |
| 294 | #define phys_to_virt(vaddr) ((void *) (vaddr)) |
| 295 | #define virt_to_phys(vaddr) ((unsigned long) (vaddr)) |
| 296 | |
| 297 | #define virt_to_bus virt_to_phys |
| 298 | #define bus_to_virt phys_to_virt |
| 299 | |
| 300 | /* |
| 301 | * Convert a physical pointer to a virtual kernel pointer for /dev/mem |
| 302 | * access |
| 303 | */ |
| 304 | #define xlate_dev_mem_ptr(p) __va(p) |
| 305 | |
| 306 | /* |
| 307 | * Convert a virtual cached pointer to an uncached pointer |
| 308 | */ |
| 309 | #define xlate_dev_kmem_ptr(p) p |
| 310 | |
| 311 | #endif /* __KERNEL__ */ |
| 312 | |
| 313 | #endif /* _ASM_UBICOM32_IO_H */ |
| 314 | |
