ARM: pxa/sa1100: move I/O space to PCI_IOBASE

PXA and StrongARM1100 traditionally map their I/O space 1:1 into virtual
memory, using a per-bus io_offset that matches the base address of the
ioremap mapping.

In order for PXA to work in a multiplatform config, this needs to
change so I/O space starts at PCI_IOBASE (0xfee00000). Since the pcmcia
soc_common support is shared with StrongARM1100, both have to change at
the same time. The affected machines are:

 - Anything with a PCMCIA slot now uses pci_remap_iospace, which
   is made available to PCMCIA configurations as well, rather than
   just PCI. The first PCMCIA slot now starts at port number 0x10000.

 - The Zeus and Viper platforms have PC/104-style ISA buses,
   which have a static mapping for both I/O and memory space at
   0xf1000000, which can no longer work. It does not appear to have
   any in-tree users, so moving it to port number 0 makes them
   behave like a traditional PC.

 - SA1100 does support ISA slots in theory, but all machines that
   originally enabled this appear to have been removed from the tree
   ages ago, and the I/O space is never mapped anywhere.

 - The Nanoengine machine has support for PCI slots, but looks
   like this never included I/O space, the resources only define the
   location for memory and config space.

With this, the definitions of __io() and IO_SPACE_LIMIT can be simplified,
as the only remaining cases are the generic PCI_IOBASE and the custom
inb()/outb() macros on RiscPC.  S3C24xx still has a custom inb()/outb()
in this here, but this is already removed in another branch.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 4 insertions, 23 deletions

diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
index 0c70eb688a00..f36ca0da8427 100644
--- a/arch/arm/include/asm/io.h
+++ b/arch/arm/include/asm/io.h
@@ -174,7 +174,7 @@ static inline void __iomem *__typesafe_io(unsigned long addr)
 #define PCI_IO_VIRT_BASE	0xfee00000
 #define PCI_IOBASE		((void __iomem *)PCI_IO_VIRT_BASE)
 
-#if defined(CONFIG_PCI)
+#if defined(CONFIG_PCI) || IS_ENABLED(CONFIG_PCMCIA)
 void pci_ioremap_set_mem_type(int mem_type);
 #else
 static inline void pci_ioremap_set_mem_type(int mem_type) {}
@@ -200,32 +200,13 @@ void __iomem *pci_remap_cfgspace(resource_size_t res_cookie, size_t size);
  */
 #ifdef CONFIG_NEED_MACH_IO_H
 #include <mach/io.h>
-#elif defined(CONFIG_PCI)
-#define IO_SPACE_LIMIT	((resource_size_t)0xfffff)
-#define __io(a)		__typesafe_io(PCI_IO_VIRT_BASE + ((a) & IO_SPACE_LIMIT))
 #else
-#define __io(a)		__typesafe_io((a) & IO_SPACE_LIMIT)
-#endif
-
-/*
- * This is the limit of PC card/PCI/ISA IO space, which is by default
- * 64K if we have PC card, PCI or ISA support.  Otherwise, default to
- * zero to prevent ISA/PCI drivers claiming IO space (and potentially
- * oopsing.)
- *
- * Only set this larger if you really need inb() et.al. to operate over
- * a larger address space.  Note that SOC_COMMON ioremaps each sockets
- * IO space area, and so inb() et.al. must be defined to operate as per
- * readb() et.al. on such platforms.
- */
-#ifndef IO_SPACE_LIMIT
-#if defined(CONFIG_PCMCIA_SOC_COMMON) || defined(CONFIG_PCMCIA_SOC_COMMON_MODULE)
-#define IO_SPACE_LIMIT ((resource_size_t)0xffffffff)
-#elif defined(CONFIG_PCI) || defined(CONFIG_ISA) || defined(CONFIG_PCCARD)
-#define IO_SPACE_LIMIT ((resource_size_t)0xffff)
+#if IS_ENABLED(CONFIG_PCMCIA) || defined(CONFIG_PCI)
+#define IO_SPACE_LIMIT	((resource_size_t)0xfffff)
 #else
 #define IO_SPACE_LIMIT ((resource_size_t)0)
 #endif
+#define __io(a)		__typesafe_io(PCI_IO_VIRT_BASE + ((a) & IO_SPACE_LIMIT))
 #endif
 
 /*