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319 lines
9.1 KiB
319 lines
9.1 KiB
/*
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* linux/arch/sh/kernel/io_rts7751r2d.c
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*
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* Copyright (C) 2001 Ian da Silva, Jeremy Siegel
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* Based largely on io_se.c.
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*
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* I/O routine for Renesas Technology sales RTS7751R2D.
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*
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* Initial version only to support LAN access; some
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* placeholder code from io_rts7751r2d.c left in with the
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* expectation of later SuperIO and PCMCIA access.
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <asm/io.h>
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#include <asm/rts7751r2d/rts7751r2d.h>
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#include <asm/addrspace.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include "../../../drivers/pci/pci-sh7751.h"
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/*
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* The 7751R RTS7751R2D uses the built-in PCI controller (PCIC)
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* of the 7751R processor, and has a SuperIO accessible via the PCI.
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* The board also includes a PCMCIA controller on its memory bus,
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* like the other Solution Engine boards.
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*/
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#define PCIIOBR (volatile long *)PCI_REG(SH7751_PCIIOBR)
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#define PCIMBR (volatile long *)PCI_REG(SH7751_PCIMBR)
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#define PCI_IO_AREA SH7751_PCI_IO_BASE
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#define PCI_MEM_AREA SH7751_PCI_CONFIG_BASE
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#define PCI_IOMAP(adr) (PCI_IO_AREA + (adr & ~SH7751_PCIIOBR_MASK))
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#define maybebadio(name,port) \
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printk("bad PC-like io %s for port 0x%lx at 0x%08x\n", \
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#name, (port), (__u32) __builtin_return_address(0))
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static inline void delay(void)
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{
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ctrl_inw(0xa0000000);
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}
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static inline unsigned long port2adr(unsigned int port)
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{
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if ((0x1f0 <= port && port < 0x1f8) || port == 0x3f6)
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if (port == 0x3f6)
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return (PA_AREA5_IO + 0x80c);
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else
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return (PA_AREA5_IO + 0x1000 + ((port-0x1f0) << 1));
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else
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maybebadio(port2adr, (unsigned long)port);
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return port;
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}
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static inline unsigned long port88796l(unsigned int port, int flag)
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{
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unsigned long addr;
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if (flag)
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addr = PA_AX88796L + ((port - AX88796L_IO_BASE) << 1);
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else
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addr = PA_AX88796L + ((port - AX88796L_IO_BASE) << 1) + 0x1000;
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return addr;
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}
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/* The 7751R RTS7751R2D seems to have everything hooked */
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/* up pretty normally (nothing on high-bytes only...) so this */
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/* shouldn't be needed */
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static inline int shifted_port(unsigned long port)
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{
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/* For IDE registers, value is not shifted */
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if ((0x1f0 <= port && port < 0x1f8) || port == 0x3f6)
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return 0;
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else
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return 1;
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}
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/* In case someone configures the kernel w/o PCI support: in that */
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/* scenario, don't ever bother to check for PCI-window addresses */
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/* NOTE: WINDOW CHECK MAY BE A BIT OFF, HIGH PCIBIOS_MIN_IO WRAPS? */
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#if defined(CONFIG_PCI)
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#define CHECK_SH7751_PCIIO(port) \
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((port >= PCIBIOS_MIN_IO) && (port < (PCIBIOS_MIN_IO + SH7751_PCI_IO_SIZE)))
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#else
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#define CHECK_SH7751_PCIIO(port) (0)
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#endif
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#if defined(CONFIG_NE2000) || defined(CONFIG_NE2000_MODULE)
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#define CHECK_AX88796L_PORT(port) \
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((port >= AX88796L_IO_BASE) && (port < (AX88796L_IO_BASE+0x20)))
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#else
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#define CHECK_AX88796L_PORT(port) (0)
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#endif
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/*
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* General outline: remap really low stuff [eventually] to SuperIO,
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* stuff in PCI IO space (at or above window at pci.h:PCIBIOS_MIN_IO)
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* is mapped through the PCI IO window. Stuff with high bits (PXSEG)
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* should be way beyond the window, and is used w/o translation for
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* compatibility.
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*/
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unsigned char rts7751r2d_inb(unsigned long port)
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{
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if (CHECK_AX88796L_PORT(port))
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return (*(volatile unsigned short *)port88796l(port, 0)) & 0xff;
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else if (PXSEG(port))
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return *(volatile unsigned char *)port;
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else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
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return *(volatile unsigned char *)PCI_IOMAP(port);
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else
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return (*(volatile unsigned short *)port2adr(port) & 0xff);
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}
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unsigned char rts7751r2d_inb_p(unsigned long port)
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{
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unsigned char v;
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if (CHECK_AX88796L_PORT(port))
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v = (*(volatile unsigned short *)port88796l(port, 0)) & 0xff;
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else if (PXSEG(port))
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v = *(volatile unsigned char *)port;
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else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
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v = *(volatile unsigned char *)PCI_IOMAP(port);
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else
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v = (*(volatile unsigned short *)port2adr(port) & 0xff);
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delay();
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return v;
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}
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unsigned short rts7751r2d_inw(unsigned long port)
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{
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if (CHECK_AX88796L_PORT(port))
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maybebadio(inw, port);
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else if (PXSEG(port))
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return *(volatile unsigned short *)port;
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else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
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return *(volatile unsigned short *)PCI_IOMAP(port);
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else
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maybebadio(inw, port);
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return 0;
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}
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unsigned int rts7751r2d_inl(unsigned long port)
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{
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if (CHECK_AX88796L_PORT(port))
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maybebadio(inl, port);
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else if (PXSEG(port))
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return *(volatile unsigned long *)port;
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else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
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return *(volatile unsigned long *)PCI_IOMAP(port);
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else
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maybebadio(inl, port);
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return 0;
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}
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void rts7751r2d_outb(unsigned char value, unsigned long port)
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{
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if (CHECK_AX88796L_PORT(port))
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*((volatile unsigned short *)port88796l(port, 0)) = value;
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else if (PXSEG(port))
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*(volatile unsigned char *)port = value;
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else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
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*(volatile unsigned char *)PCI_IOMAP(port) = value;
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else
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*(volatile unsigned short *)port2adr(port) = value;
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}
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void rts7751r2d_outb_p(unsigned char value, unsigned long port)
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{
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if (CHECK_AX88796L_PORT(port))
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*((volatile unsigned short *)port88796l(port, 0)) = value;
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else if (PXSEG(port))
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*(volatile unsigned char *)port = value;
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else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
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*(volatile unsigned char *)PCI_IOMAP(port) = value;
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else
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*(volatile unsigned short *)port2adr(port) = value;
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delay();
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}
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void rts7751r2d_outw(unsigned short value, unsigned long port)
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{
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if (CHECK_AX88796L_PORT(port))
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maybebadio(outw, port);
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else if (PXSEG(port))
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*(volatile unsigned short *)port = value;
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else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
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*(volatile unsigned short *)PCI_IOMAP(port) = value;
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else
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maybebadio(outw, port);
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}
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void rts7751r2d_outl(unsigned int value, unsigned long port)
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{
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if (CHECK_AX88796L_PORT(port))
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maybebadio(outl, port);
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else if (PXSEG(port))
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*(volatile unsigned long *)port = value;
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else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
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*(volatile unsigned long *)PCI_IOMAP(port) = value;
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else
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maybebadio(outl, port);
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}
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void rts7751r2d_insb(unsigned long port, void *addr, unsigned long count)
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{
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volatile __u8 *bp;
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volatile __u16 *p;
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if (CHECK_AX88796L_PORT(port)) {
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p = (volatile unsigned short *)port88796l(port, 0);
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while (count--) *((unsigned char *) addr)++ = *p & 0xff;
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} else if (PXSEG(port))
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while (count--) *((unsigned char *) addr)++ = *(volatile unsigned char *)port;
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else if (CHECK_SH7751_PCIIO(port) || shifted_port(port)) {
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bp = (__u8 *)PCI_IOMAP(port);
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while (count--) *((volatile unsigned char *) addr)++ = *bp;
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} else {
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p = (volatile unsigned short *)port2adr(port);
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while (count--) *((unsigned char *) addr)++ = *p & 0xff;
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}
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}
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void rts7751r2d_insw(unsigned long port, void *addr, unsigned long count)
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{
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volatile __u16 *p;
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if (CHECK_AX88796L_PORT(port))
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p = (volatile unsigned short *)port88796l(port, 1);
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else if (PXSEG(port))
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p = (volatile unsigned short *)port;
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else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
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p = (volatile unsigned short *)PCI_IOMAP(port);
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else
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p = (volatile unsigned short *)port2adr(port);
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while (count--) *((__u16 *) addr)++ = *p;
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}
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void rts7751r2d_insl(unsigned long port, void *addr, unsigned long count)
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{
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if (CHECK_AX88796L_PORT(port))
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maybebadio(insl, port);
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else if (CHECK_SH7751_PCIIO(port) || shifted_port(port)) {
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volatile __u32 *p = (__u32 *)PCI_IOMAP(port);
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while (count--) *((__u32 *) addr)++ = *p;
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} else
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maybebadio(insl, port);
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}
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void rts7751r2d_outsb(unsigned long port, const void *addr, unsigned long count)
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{
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volatile __u8 *bp;
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volatile __u16 *p;
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if (CHECK_AX88796L_PORT(port)) {
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p = (volatile unsigned short *)port88796l(port, 0);
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while (count--) *p = *((unsigned char *) addr)++;
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} else if (PXSEG(port))
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while (count--) *(volatile unsigned char *)port = *((unsigned char *) addr)++;
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else if (CHECK_SH7751_PCIIO(port) || shifted_port(port)) {
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bp = (__u8 *)PCI_IOMAP(port);
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while (count--) *bp = *((volatile unsigned char *) addr)++;
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} else {
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p = (volatile unsigned short *)port2adr(port);
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while (count--) *p = *((unsigned char *) addr)++;
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}
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}
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void rts7751r2d_outsw(unsigned long port, const void *addr, unsigned long count)
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{
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volatile __u16 *p;
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if (CHECK_AX88796L_PORT(port))
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p = (volatile unsigned short *)port88796l(port, 1);
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else if (PXSEG(port))
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p = (volatile unsigned short *)port;
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else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
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p = (volatile unsigned short *)PCI_IOMAP(port);
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else
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p = (volatile unsigned short *)port2adr(port);
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while (count--) *p = *((__u16 *) addr)++;
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}
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void rts7751r2d_outsl(unsigned long port, const void *addr, unsigned long count)
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{
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if (CHECK_AX88796L_PORT(port))
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maybebadio(outsl, port);
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else if (CHECK_SH7751_PCIIO(port) || shifted_port(port)) {
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volatile __u32 *p = (__u32 *)PCI_IOMAP(port);
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while (count--) *p = *((__u32 *) addr)++;
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} else
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maybebadio(outsl, port);
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}
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void *rts7751r2d_ioremap(unsigned long offset, unsigned long size)
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{
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if (offset >= 0xfd000000)
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return (void *)offset;
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else
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return (void *)P2SEGADDR(offset);
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}
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EXPORT_SYMBOL(rts7751r2d_ioremap);
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unsigned long rts7751r2d_isa_port2addr(unsigned long offset)
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{
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return port2adr(offset);
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}
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