* Add support for 16 MB flash configuration of TRAB board

* Patch by Erwin Rol, 27 Feb 2003:
  Add support for RTEMS

* Add image information to README

* Fix dual PCMCIA slot support (when running with just one
  slot populated)

* Add VFD type detection to trab board

* extend drivers/cs8900.c driver to synchronize  ethaddr  environment
  variable with value in the EEPROM

* Start adding MIPS support files

1 files changed, 450 insertions, 0 deletions

diff --git a/include/asm-mips/io.h b/include/asm-mips/io.h
new file mode 100644
index 0000000..9a7aaf7
--- /dev/null
+++ b/include/asm-mips/io.h
@@ -0,0 +1,450 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1994, 1995 Waldorf GmbH
+ * Copyright (C) 1994 - 2000 Ralf Baechle
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2000 FSMLabs, Inc.
+ */
+#ifndef _ASM_IO_H
+#define _ASM_IO_H
+
+#include <linux/config.h>
+#if 0
+#include <linux/pagemap.h>
+#endif
+#include <asm/addrspace.h>
+#include <asm/byteorder.h>
+
+/*
+ * Slowdown I/O port space accesses for antique hardware.
+ */
+#undef CONF_SLOWDOWN_IO
+
+/*
+ * Sane hardware offers swapping of I/O space accesses in hardware; less
+ * sane hardware forces software to fiddle with this ...
+ */
+#if defined(CONFIG_SWAP_IO_SPACE) && defined(__MIPSEB__)
+
+#define __ioswab8(x) (x)
+#define __ioswab16(x) swab16(x)
+#define __ioswab32(x) swab32(x)
+
+#else
+
+#define __ioswab8(x) (x)
+#define __ioswab16(x) (x)
+#define __ioswab32(x) (x)
+
+#endif
+
+/*
+ * This file contains the definitions for the MIPS counterpart of the
+ * x86 in/out instructions. This heap of macros and C results in much
+ * better code than the approach of doing it in plain C.  The macros
+ * result in code that is to fast for certain hardware.  On the other
+ * side the performance of the string functions should be improved for
+ * sake of certain devices like EIDE disks that do highspeed polled I/O.
+ *
+ *   Ralf
+ *
+ * This file contains the definitions for the x86 IO instructions
+ * inb/inw/inl/outb/outw/outl and the "string versions" of the same
+ * (insb/insw/insl/outsb/outsw/outsl). You can also use "pausing"
+ * versions of the single-IO instructions (inb_p/inw_p/..).
+ *
+ * This file is not meant to be obfuscating: it's just complicated
+ * to (a) handle it all in a way that makes gcc able to optimize it
+ * as well as possible and (b) trying to avoid writing the same thing
+ * over and over again with slight variations and possibly making a
+ * mistake somewhere.
+ */
+
+/*
+ * On MIPS I/O ports are memory mapped, so we access them using normal
+ * load/store instructions. mips_io_port_base is the virtual address to
+ * which all ports are being mapped.  For sake of efficiency some code
+ * assumes that this is an address that can be loaded with a single lui
+ * instruction, so the lower 16 bits must be zero.  Should be true on
+ * on any sane architecture; generic code does not use this assumption.
+ */
+extern unsigned long mips_io_port_base;
+
+/*
+ * Thanks to James van Artsdalen for a better timing-fix than
+ * the two short jumps: using outb's to a nonexistent port seems
+ * to guarantee better timings even on fast machines.
+ *
+ * On the other hand, I'd like to be sure of a non-existent port:
+ * I feel a bit unsafe about using 0x80 (should be safe, though)
+ *
+ *		Linus
+ *
+ */
+
+#define __SLOW_DOWN_IO \
+	__asm__ __volatile__( \
+		"sb\t$0,0x80(%0)" \
+		: : "r" (mips_io_port_base));
+
+#ifdef CONF_SLOWDOWN_IO
+#ifdef REALLY_SLOW_IO
+#define SLOW_DOWN_IO { __SLOW_DOWN_IO; __SLOW_DOWN_IO; __SLOW_DOWN_IO; __SLOW_DOWN_IO; }
+#else
+#define SLOW_DOWN_IO __SLOW_DOWN_IO
+#endif
+#else
+#define SLOW_DOWN_IO
+#endif
+
+/*
+ * Change virtual addresses to physical addresses and vv.
+ * These are trivial on the 1:1 Linux/MIPS mapping
+ */
+extern inline unsigned long virt_to_phys(volatile void * address)
+{
+	return PHYSADDR(address);
+}
+
+extern inline void * phys_to_virt(unsigned long address)
+{
+	return (void *)KSEG0ADDR(address);
+}
+
+/*
+ * IO bus memory addresses are also 1:1 with the physical address
+ */
+extern inline unsigned long virt_to_bus(volatile void * address)
+{
+	return PHYSADDR(address);
+}
+
+extern inline void * bus_to_virt(unsigned long address)
+{
+	return (void *)KSEG0ADDR(address);
+}
+
+/*
+ * isa_slot_offset is the address where E(ISA) busaddress 0 is mapped
+ * for the processor.
+ */
+extern unsigned long isa_slot_offset;
+
+extern void * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
+
+#if 0
+extern inline void *ioremap(unsigned long offset, unsigned long size)
+{
+	return __ioremap(offset, size, _CACHE_UNCACHED);
+}
+
+extern inline void *ioremap_nocache(unsigned long offset, unsigned long size)
+{
+	return __ioremap(offset, size, _CACHE_UNCACHED);
+}
+
+extern void iounmap(void *addr);
+#endif
+
+/*
+ * XXX We need system specific versions of these to handle EISA address bits
+ * 24-31 on SNI.
+ * XXX more SNI hacks.
+ */
+#define readb(addr) (*(volatile unsigned char *)(addr))
+#define readw(addr) __ioswab16((*(volatile unsigned short *)(addr)))
+#define readl(addr) __ioswab32((*(volatile unsigned int *)(addr)))
+#define __raw_readb readb
+#define __raw_readw readw
+#define __raw_readl readl
+
+#define writeb(b,addr) (*(volatile unsigned char *)(addr)) = (b)
+#define writew(b,addr) (*(volatile unsigned short *)(addr)) = (__ioswab16(b))
+#define writel(b,addr) (*(volatile unsigned int *)(addr)) = (__ioswab32(b))
+#define __raw_writeb writeb
+#define __raw_writew writew
+#define __raw_writel writel
+
+#define memset_io(a,b,c)	memset((void *)(a),(b),(c))
+#define memcpy_fromio(a,b,c)	memcpy((a),(void *)(b),(c))
+#define memcpy_toio(a,b,c)	memcpy((void *)(a),(b),(c))
+
+/* END SNI HACKS ... */
+
+/*
+ * ISA space is 'always mapped' on currently supported MIPS systems, no need
+ * to explicitly ioremap() it. The fact that the ISA IO space is mapped
+ * to PAGE_OFFSET is pure coincidence - it does not mean ISA values
+ * are physical addresses. The following constant pointer can be
+ * used as the IO-area pointer (it can be iounmapped as well, so the
+ * analogy with PCI is quite large):
+ */
+#define __ISA_IO_base ((char *)(PAGE_OFFSET))
+
+#define isa_readb(a) readb(a)
+#define isa_readw(a) readw(a)
+#define isa_readl(a) readl(a)
+#define isa_writeb(b,a) writeb(b,a)
+#define isa_writew(w,a) writew(w,a)
+#define isa_writel(l,a) writel(l,a)
+
+#define isa_memset_io(a,b,c)     memset_io((a),(b),(c))
+#define isa_memcpy_fromio(a,b,c) memcpy_fromio((a),(b),(c))
+#define isa_memcpy_toio(a,b,c)   memcpy_toio((a),(b),(c))
+
+/*
+ * We don't have csum_partial_copy_fromio() yet, so we cheat here and
+ * just copy it. The net code will then do the checksum later.
+ */
+#define eth_io_copy_and_sum(skb,src,len,unused) memcpy_fromio((skb)->data,(src),(len))
+#define isa_eth_io_copy_and_sum(a,b,c,d) eth_copy_and_sum((a),(b),(c),(d))
+
+static inline int check_signature(unsigned long io_addr,
+                                  const unsigned char *signature, int length)
+{
+	int retval = 0;
+	do {
+		if (readb(io_addr) != *signature)
+			goto out;
+		io_addr++;
+		signature++;
+		length--;
+	} while (length);
+	retval = 1;
+out:
+	return retval;
+}
+#define isa_check_signature(io, s, l) check_signature(i,s,l)
+
+/*
+ * Talk about misusing macros..
+ */
+
+#define __OUT1(s) \
+extern inline void __out##s(unsigned int value, unsigned int port) {
+
+#define __OUT2(m) \
+__asm__ __volatile__ ("s" #m "\t%0,%1(%2)"
+
+#define __OUT(m,s,w) \
+__OUT1(s) __OUT2(m) : : "r" (__ioswab##w(value)), "i" (0), "r" (mips_io_port_base+port)); } \
+__OUT1(s##c) __OUT2(m) : : "r" (__ioswab##w(value)), "ir" (port), "r" (mips_io_port_base)); } \
+__OUT1(s##_p) __OUT2(m) : : "r" (__ioswab##w(value)), "i" (0), "r" (mips_io_port_base+port)); \
+	SLOW_DOWN_IO; } \
+__OUT1(s##c_p) __OUT2(m) : : "r" (__ioswab##w(value)), "ir" (port), "r" (mips_io_port_base)); \
+	SLOW_DOWN_IO; }
+
+#define __IN1(t,s) \
+extern __inline__ t __in##s(unsigned int port) { t _v;
+
+/*
+ * Required nops will be inserted by the assembler
+ */
+#define __IN2(m) \
+__asm__ __volatile__ ("l" #m "\t%0,%1(%2)"
+
+#define __IN(t,m,s,w) \
+__IN1(t,s) __IN2(m) : "=r" (_v) : "i" (0), "r" (mips_io_port_base+port)); return __ioswab##w(_v); } \
+__IN1(t,s##c) __IN2(m) : "=r" (_v) : "ir" (port), "r" (mips_io_port_base)); return __ioswab##w(_v); } \
+__IN1(t,s##_p) __IN2(m) : "=r" (_v) : "i" (0), "r" (mips_io_port_base+port)); SLOW_DOWN_IO; return __ioswab##w(_v); } \
+__IN1(t,s##c_p) __IN2(m) : "=r" (_v) : "ir" (port), "r" (mips_io_port_base)); SLOW_DOWN_IO; return __ioswab##w(_v); }
+
+#define __INS1(s) \
+extern inline void __ins##s(unsigned int port, void * addr, unsigned long count) {
+
+#define __INS2(m) \
+if (count) \
+__asm__ __volatile__ ( \
+	".set\tnoreorder\n\t" \
+	".set\tnoat\n" \
+	"1:\tl" #m "\t$1,%4(%5)\n\t" \
+	"subu\t%1,1\n\t" \
+	"s" #m "\t$1,(%0)\n\t" \
+	"bne\t$0,%1,1b\n\t" \
+	"addiu\t%0,%6\n\t" \
+	".set\tat\n\t" \
+	".set\treorder"
+
+#define __INS(m,s,i) \
+__INS1(s) __INS2(m) \
+	: "=r" (addr), "=r" (count) \
+	: "0" (addr), "1" (count), "i" (0), \
+	  "r" (mips_io_port_base+port), "I" (i) \
+	: "$1");} \
+__INS1(s##c) __INS2(m) \
+	: "=r" (addr), "=r" (count) \
+	: "0" (addr), "1" (count), "ir" (port), \
+	  "r" (mips_io_port_base), "I" (i) \
+	: "$1");}
+
+#define __OUTS1(s) \
+extern inline void __outs##s(unsigned int port, const void * addr, unsigned long count) {
+
+#define __OUTS2(m) \
+if (count) \
+__asm__ __volatile__ ( \
+        ".set\tnoreorder\n\t" \
+        ".set\tnoat\n" \
+        "1:\tl" #m "\t$1,(%0)\n\t" \
+        "subu\t%1,1\n\t" \
+        "s" #m "\t$1,%4(%5)\n\t" \
+        "bne\t$0,%1,1b\n\t" \
+        "addiu\t%0,%6\n\t" \
+        ".set\tat\n\t" \
+        ".set\treorder"
+
+#define __OUTS(m,s,i) \
+__OUTS1(s) __OUTS2(m) \
+	: "=r" (addr), "=r" (count) \
+	: "0" (addr), "1" (count), "i" (0), "r" (mips_io_port_base+port), "I" (i) \
+	: "$1");} \
+__OUTS1(s##c) __OUTS2(m) \
+	: "=r" (addr), "=r" (count) \
+	: "0" (addr), "1" (count), "ir" (port), "r" (mips_io_port_base), "I" (i) \
+	: "$1");}
+
+__IN(unsigned char,b,b,8)
+__IN(unsigned short,h,w,16)
+__IN(unsigned int,w,l,32)
+
+__OUT(b,b,8)
+__OUT(h,w,16)
+__OUT(w,l,32)
+
+__INS(b,b,1)
+__INS(h,w,2)
+__INS(w,l,4)
+
+__OUTS(b,b,1)
+__OUTS(h,w,2)
+__OUTS(w,l,4)
+
+
+/*
+ * Note that due to the way __builtin_constant_p() works, you
+ *  - can't use it inside an inline function (it will never be true)
+ *  - you don't have to worry about side effects within the __builtin..
+ */
+#define outb(val,port) \
+((__builtin_constant_p((port)) && (port) < 32768) ? \
+	__outbc((val),(port)) : \
+	__outb((val),(port)))
+
+#define inb(port) \
+((__builtin_constant_p((port)) && (port) < 32768) ? \
+	__inbc(port) : \
+	__inb(port))
+
+#define outb_p(val,port) \
+((__builtin_constant_p((port)) && (port) < 32768) ? \
+	__outbc_p((val),(port)) : \
+	__outb_p((val),(port)))
+
+#define inb_p(port) \
+((__builtin_constant_p((port)) && (port) < 32768) ? \
+	__inbc_p(port) : \
+	__inb_p(port))
+
+#define outw(val,port) \
+((__builtin_constant_p((port)) && (port) < 32768) ? \
+	__outwc((val),(port)) : \
+	__outw((val),(port)))
+
+#define inw(port) \
+((__builtin_constant_p((port)) && (port) < 32768) ? \
+	__inwc(port) : \
+	__inw(port))
+
+#define outw_p(val,port) \
+((__builtin_constant_p((port)) && (port) < 32768) ? \
+	__outwc_p((val),(port)) : \
+	__outw_p((val),(port)))
+
+#define inw_p(port) \
+((__builtin_constant_p((port)) && (port) < 32768) ? \
+	__inwc_p(port) : \
+	__inw_p(port))
+
+#define outl(val,port) \
+((__builtin_constant_p((port)) && (port) < 32768) ? \
+	__outlc((val),(port)) : \
+	__outl((val),(port)))
+
+#define inl(port) \
+((__builtin_constant_p((port)) && (port) < 32768) ? \
+	__inlc(port) : \
+	__inl(port))
+
+#define outl_p(val,port) \
+((__builtin_constant_p((port)) && (port) < 32768) ? \
+	__outlc_p((val),(port)) : \
+	__outl_p((val),(port)))
+
+#define inl_p(port) \
+((__builtin_constant_p((port)) && (port) < 32768) ? \
+	__inlc_p(port) : \
+	__inl_p(port))
+
+
+#define outsb(port,addr,count) \
+((__builtin_constant_p((port)) && (port) < 32768) ? \
+	__outsbc((port),(addr),(count)) : \
+	__outsb ((port),(addr),(count)))
+
+#define insb(port,addr,count) \
+((__builtin_constant_p((port)) && (port) < 32768) ? \
+	__insbc((port),(addr),(count)) : \
+	__insb((port),(addr),(count)))
+
+#define outsw(port,addr,count) \
+((__builtin_constant_p((port)) && (port) < 32768) ? \
+	__outswc((port),(addr),(count)) : \
+	__outsw ((port),(addr),(count)))
+
+#define insw(port,addr,count) \
+((__builtin_constant_p((port)) && (port) < 32768) ? \
+	__inswc((port),(addr),(count)) : \
+	__insw((port),(addr),(count)))
+
+#define outsl(port,addr,count) \
+((__builtin_constant_p((port)) && (port) < 32768) ? \
+	__outslc((port),(addr),(count)) : \
+	__outsl ((port),(addr),(count)))
+
+#define insl(port,addr,count) \
+((__builtin_constant_p((port)) && (port) < 32768) ? \
+	__inslc((port),(addr),(count)) : \
+	__insl((port),(addr),(count)))
+
+#define IO_SPACE_LIMIT 0xffff
+
+/*
+ * The caches on some architectures aren't dma-coherent and have need to
+ * handle this in software.  There are three types of operations that
+ * can be applied to dma buffers.
+ *
+ *  - dma_cache_wback_inv(start, size) makes caches and coherent by
+ *    writing the content of the caches back to memory, if necessary.
+ *    The function also invalidates the affected part of the caches as
+ *    necessary before DMA transfers from outside to memory.
+ *  - dma_cache_wback(start, size) makes caches and coherent by
+ *    writing the content of the caches back to memory, if necessary.
+ *    The function also invalidates the affected part of the caches as
+ *    necessary before DMA transfers from outside to memory.
+ *  - dma_cache_inv(start, size) invalidates the affected parts of the
+ *    caches.  Dirty lines of the caches may be written back or simply
+ *    be discarded.  This operation is necessary before dma operations
+ *    to the memory.
+ */
+extern void (*_dma_cache_wback_inv)(unsigned long start, unsigned long size);
+extern void (*_dma_cache_wback)(unsigned long start, unsigned long size);
+extern void (*_dma_cache_inv)(unsigned long start, unsigned long size);
+
+#define dma_cache_wback_inv(start,size)	_dma_cache_wback_inv(start,size)
+#define dma_cache_wback(start,size)	_dma_cache_wback(start,size)
+#define dma_cache_inv(start,size)	_dma_cache_inv(start,size)
+
+#endif /* _ASM_IO_H */