diff options
Diffstat (limited to 'arch/sh/boards/se/770x/io.c')
| -rw-r--r-- | arch/sh/boards/se/770x/io.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/arch/sh/boards/se/770x/io.c b/arch/sh/boards/se/770x/io.c new file mode 100644 index 00000000000..9a39ee96314 --- /dev/null +++ b/arch/sh/boards/se/770x/io.c @@ -0,0 +1,226 @@ +/* $Id: io.c,v 1.5 2004/02/22 23:08:43 kkojima Exp $ + * + * linux/arch/sh/kernel/io_se.c + * + * Copyright (C) 2000 Kazumoto Kojima + * + * I/O routine for Hitachi SolutionEngine. + * + */ + +#include <linux/kernel.h> +#include <linux/types.h> +#include <asm/io.h> +#include <asm/se/se.h> + +/* SH pcmcia io window base, start and end. */ +int sh_pcic_io_wbase = 0xb8400000; +int sh_pcic_io_start; +int sh_pcic_io_stop; +int sh_pcic_io_type; +int sh_pcic_io_dummy; + +static inline void delay(void) +{ + ctrl_inw(0xa0000000); +} + +/* MS7750 requires special versions of in*, out* routines, since + PC-like io ports are located at upper half byte of 16-bit word which + can be accessed only with 16-bit wide. */ + +static inline volatile __u16 * +port2adr(unsigned int port) +{ + if (port >= 0x2000) + return (volatile __u16 *) (PA_MRSHPC + (port - 0x2000)); + else if (port >= 0x1000) + return (volatile __u16 *) (PA_83902 + (port << 1)); + else if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop) + return (volatile __u16 *) (sh_pcic_io_wbase + (port &~ 1)); + else + return (volatile __u16 *) (PA_SUPERIO + (port << 1)); +} + +static inline int +shifted_port(unsigned long port) +{ + /* For IDE registers, value is not shifted */ + if ((0x1f0 <= port && port < 0x1f8) || port == 0x3f6) + return 0; + else + return 1; +} + +#define maybebadio(name,port) \ + printk("bad PC-like io %s for port 0x%lx at 0x%08x\n", \ + #name, (port), (__u32) __builtin_return_address(0)) + +unsigned char se_inb(unsigned long port) +{ + if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop) + return *(__u8 *) (sh_pcic_io_wbase + 0x40000 + port); + else if (shifted_port(port)) + return (*port2adr(port) >> 8); + else + return (*port2adr(port))&0xff; +} + +unsigned char se_inb_p(unsigned long port) +{ + unsigned long v; + + if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop) + v = *(__u8 *) (sh_pcic_io_wbase + 0x40000 + port); + else if (shifted_port(port)) + v = (*port2adr(port) >> 8); + else + v = (*port2adr(port))&0xff; + delay(); + return v; +} + +unsigned short se_inw(unsigned long port) +{ + if (port >= 0x2000 || + (sh_pcic_io_start <= port && port <= sh_pcic_io_stop)) + return *port2adr(port); + else + maybebadio(inw, port); + return 0; +} + +unsigned int se_inl(unsigned long port) +{ + maybebadio(inl, port); + return 0; +} + +void se_outb(unsigned char value, unsigned long port) +{ + if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop) + *(__u8 *)(sh_pcic_io_wbase + port) = value; + else if (shifted_port(port)) + *(port2adr(port)) = value << 8; + else + *(port2adr(port)) = value; +} + +void se_outb_p(unsigned char value, unsigned long port) +{ + if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop) + *(__u8 *)(sh_pcic_io_wbase + port) = value; + else if (shifted_port(port)) + *(port2adr(port)) = value << 8; + else + *(port2adr(port)) = value; + delay(); +} + +void se_outw(unsigned short value, unsigned long port) +{ + if (port >= 0x2000 || + (sh_pcic_io_start <= port && port <= sh_pcic_io_stop)) + *port2adr(port) = value; + else + maybebadio(outw, port); +} + +void se_outl(unsigned int value, unsigned long port) +{ + maybebadio(outl, port); +} + +void se_insb(unsigned long port, void *addr, unsigned long count) +{ + volatile __u16 *p = port2adr(port); + __u8 *ap = addr; + + if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop) { + volatile __u8 *bp = (__u8 *) (sh_pcic_io_wbase + 0x40000 + port); + while (count--) + *ap++ = *bp; + } else if (shifted_port(port)) { + while (count--) + *ap++ = *p >> 8; + } else { + while (count--) + *ap++ = *p; + } +} + +void se_insw(unsigned long port, void *addr, unsigned long count) +{ + volatile __u16 *p = port2adr(port); + __u16 *ap = addr; + while (count--) + *ap++ = *p; +} + +void se_insl(unsigned long port, void *addr, unsigned long count) +{ + maybebadio(insl, port); +} + +void se_outsb(unsigned long port, const void *addr, unsigned long count) +{ + volatile __u16 *p = port2adr(port); + const __u8 *ap = addr; + + if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop) { + volatile __u8 *bp = (__u8 *) (sh_pcic_io_wbase + port); + while (count--) + *bp = *ap++; + } else if (shifted_port(port)) { + while (count--) + *p = *ap++ << 8; + } else { + while (count--) + *p = *ap++; + } +} + +void se_outsw(unsigned long port, const void *addr, unsigned long count) +{ + volatile __u16 *p = port2adr(port); + const __u16 *ap = addr; + while (count--) + *p = *ap++; +} + +void se_outsl(unsigned long port, const void *addr, unsigned long count) +{ + maybebadio(outsw, port); +} + +/* Map ISA bus address to the real address. Only for PCMCIA. */ + +/* ISA page descriptor. */ +static __u32 sh_isa_memmap[256]; + +static int +sh_isa_mmap(__u32 start, __u32 length, __u32 offset) +{ + int idx; + + if (start >= 0x100000 || (start & 0xfff) || (length != 0x1000)) + return -1; + + idx = start >> 12; + sh_isa_memmap[idx] = 0xb8000000 + (offset &~ 0xfff); +#if 0 + printk("sh_isa_mmap: start %x len %x offset %x (idx %x paddr %x)\n", + start, length, offset, idx, sh_isa_memmap[idx]); +#endif + return 0; +} + +unsigned long +se_isa_port2addr(unsigned long offset) +{ + int idx; + + idx = (offset >> 12) & 0xff; + offset &= 0xfff; + return sh_isa_memmap[idx] + offset; +} |