io_7751se.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:8k
- /*
- * linux/arch/sh/kernel/io_7751se.c
- *
- * Copyright (C) 2001 Ian da Silva, Jeremy Siegel
- * Based largely on io_se.c.
- *
- * I/O routine for Hitachi 7751 SolutionEngine.
- *
- * Initial version only to support LAN access; some
- * placeholder code from io_se.c left in with the
- * expectation of later SuperIO and PCMCIA access.
- */
- #include <linux/kernel.h>
- #include <linux/types.h>
- #include <asm/io.h>
- #include <asm/hitachi_7751se.h>
- #include <asm/addrspace.h>
- #include <linux/pci.h>
- #include <asm/pci-sh7751.h>
- #if 0
- /******************************************************************
- * Variables from io_se.c, related to PCMCIA (not PCI); we're not
- * compiling them in, and have removed references from functions
- * which follow. [Many checked for IO ports in the range bounded
- * by sh_pcic_io_start/stop, and used sh_pcic_io_wbase as offset.
- * As start/stop are uninitialized, only port 0x0 would match?]
- * When used, remember to adjust names to avoid clash with io_se?
- *****************************************************************/
- /* 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;
- /*************************************************************/
- #endif
- /*
- * The 7751 Solution Engine uses the built-in PCI controller (PCIC)
- * of the 7751 processor, and has a SuperIO accessible via the PCI.
- * The board also includes a PCMCIA controller on its memory bus,
- * like the other Solution Engine boards.
- */
- #define PCIIOBR (volatile long *)PCI_REG(SH7751_PCIIOBR)
- #define PCIMBR (volatile long *)PCI_REG(SH7751_PCIMBR)
- #define PCI_IO_AREA SH7751_PCI_IO_BASE
- #define PCI_MEM_AREA SH7751_PCI_CONFIG_BASE
- #define PCI_IOMAP(adr) (PCI_IO_AREA + (adr & ~SH7751_PCIIOBR_MASK))
- #define maybebadio(name,port)
- printk("bad PC-like io %s for port 0x%lx at 0x%08xn",
- #name, (port), (__u32) __builtin_return_address(0))
- static inline void delay(void)
- {
- ctrl_inw(0xa0000000);
- }
- static inline volatile __u16 *
- port2adr(unsigned int port)
- {
- if (port >= 0x2000)
- return (volatile __u16 *) (PA_MRSHPC + (port - 0x2000));
- #if 0
- else
- return (volatile __u16 *) (PA_SUPERIO + (port << 1));
- #endif
- maybebadio(name,(unsigned long)port);
- return (volatile __u16*)port;
- }
- #if 0
- /* The 7751 Solution Engine seems to have everything hooked */
- /* up pretty normally (nothing on high-bytes only...) so this */
- /* shouldn't be needed */
- 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;
- }
- #endif
- /* In case someone configures the kernel w/o PCI support: in that */
- /* scenario, don't ever bother to check for PCI-window addresses */
- /* NOTE: WINDOW CHECK MAY BE A BIT OFF, HIGH PCIBIOS_MIN_IO WRAPS? */
- #if defined(CONFIG_PCI)
- #define CHECK_SH7751_PCIIO(port)
- ((port >= PCIBIOS_MIN_IO) && (port < (PCIBIOS_MIN_IO + SH7751_PCI_IO_SIZE)))
- #else
- #define CHECK_SH_7751_PCIIO(port) (0)
- #endif
- /*
- * General outline: remap really low stuff [eventually] to SuperIO,
- * stuff in PCI IO space (at or above window at pci.h:PCIBIOS_MIN_IO)
- * is mapped through the PCI IO window. Stuff with high bits (PXSEG)
- * should be way beyond the window, and is used w/o translation for
- * compatibility.
- */
- unsigned char sh7751se_inb(unsigned long port)
- {
- if (PXSEG(port))
- return *(volatile unsigned char *)port;
- else if (CHECK_SH7751_PCIIO(port))
- return *(volatile unsigned char *)PCI_IOMAP(port);
- else
- return (*port2adr(port))&0xff;
- }
- unsigned char sh7751se_inb_p(unsigned long port)
- {
- unsigned char v;
- if (PXSEG(port))
- v = *(volatile unsigned char *)port;
- else if (CHECK_SH7751_PCIIO(port))
- v = *(volatile unsigned char *)PCI_IOMAP(port);
- else
- v = (*port2adr(port))&0xff;
- delay();
- return v;
- }
- unsigned short sh7751se_inw(unsigned long port)
- {
- if (PXSEG(port))
- return *(volatile unsigned short *)port;
- else if (CHECK_SH7751_PCIIO(port))
- return *(volatile unsigned short *)PCI_IOMAP(port);
- else if (port >= 0x2000)
- return *port2adr(port);
- else
- maybebadio(inw, port);
- return 0;
- }
- unsigned int sh7751se_inl(unsigned long port)
- {
- if (PXSEG(port))
- return *(volatile unsigned long *)port;
- else if (CHECK_SH7751_PCIIO(port))
- return *(volatile unsigned int *)PCI_IOMAP(port);
- else if (port >= 0x2000)
- return *port2adr(port);
- else
- maybebadio(inl, port);
- return 0;
- }
- void sh7751se_outb(unsigned char value, unsigned long port)
- {
- if (PXSEG(port))
- *(volatile unsigned char *)port = value;
- else if (CHECK_SH7751_PCIIO(port))
- *((unsigned char*)PCI_IOMAP(port)) = value;
- else
- *(port2adr(port)) = value;
- }
- void sh7751se_outb_p(unsigned char value, unsigned long port)
- {
- if (PXSEG(port))
- *(volatile unsigned char *)port = value;
- else if (CHECK_SH7751_PCIIO(port))
- *((unsigned char*)PCI_IOMAP(port)) = value;
- else
- *(port2adr(port)) = value;
- delay();
- }
- void sh7751se_outw(unsigned short value, unsigned long port)
- {
- if (PXSEG(port))
- *(volatile unsigned short *)port = value;
- else if (CHECK_SH7751_PCIIO(port))
- *((unsigned short *)PCI_IOMAP(port)) = value;
- else if (port >= 0x2000)
- *port2adr(port) = value;
- else
- maybebadio(outw, port);
- }
- void sh7751se_outl(unsigned int value, unsigned long port)
- {
- if (PXSEG(port))
- *(volatile unsigned long *)port = value;
- else if (CHECK_SH7751_PCIIO(port))
- *((unsigned long*)PCI_IOMAP(port)) = value;
- else
- maybebadio(outl, port);
- }
- void sh7751se_insb(unsigned long port, void *addr, unsigned long count)
- {
- unsigned char *p = addr;
- while (count--) *p++ = sh7751se_inb(port);
- }
- void sh7751se_insw(unsigned long port, void *addr, unsigned long count)
- {
- unsigned short *p = addr;
- while (count--) *p++ = sh7751se_inw(port);
- }
- void sh7751se_insl(unsigned long port, void *addr, unsigned long count)
- {
- maybebadio(insl, port);
- }
- void sh7751se_outsb(unsigned long port, const void *addr, unsigned long count)
- {
- unsigned char *p = (unsigned char*)addr;
- while (count--) sh7751se_outb(*p++, port);
- }
- void sh7751se_outsw(unsigned long port, const void *addr, unsigned long count)
- {
- unsigned short *p = (unsigned short*)addr;
- while (count--) sh7751se_outw(*p++, port);
- }
- void sh7751se_outsl(unsigned long port, const void *addr, unsigned long count)
- {
- maybebadio(outsw, port);
- }
- /* For read/write calls, just copy generic (pass-thru); PCIMBR is */
- /* already set up. For a larger memory space, these would need to */
- /* reset PCIMBR as needed on a per-call basis... */
- unsigned char sh7751se_readb(unsigned long addr)
- {
- return *(volatile unsigned char*)addr;
- }
- unsigned short sh7751se_readw(unsigned long addr)
- {
- return *(volatile unsigned short*)addr;
- }
- unsigned int sh7751se_readl(unsigned long addr)
- {
- return *(volatile unsigned long*)addr;
- }
- void sh7751se_writeb(unsigned char b, unsigned long addr)
- {
- *(volatile unsigned char*)addr = b;
- }
- void sh7751se_writew(unsigned short b, unsigned long addr)
- {
- *(volatile unsigned short*)addr = b;
- }
- void sh7751se_writel(unsigned int b, unsigned long addr)
- {
- *(volatile unsigned long*)addr = b;
- }
- /* Map ISA bus address to the real address. Only for PCMCIA. */
- /* ISA page descriptor. */
- static __u32 sh_isa_memmap[256];
- #if 0
- 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);
- printk("sh_isa_mmap: start %x len %x offset %x (idx %x paddr %x)n",
- start, length, offset, idx, sh_isa_memmap[idx]);
- return 0;
- }
- #endif
- unsigned long
- sh7751se_isa_port2addr(unsigned long offset)
- {
- int idx;
- idx = (offset >> 12) & 0xff;
- offset &= 0xfff;
- return sh_isa_memmap[idx] + offset;
- }