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ARM: iop3xx: use fixed PCI i/o mapping

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Move iop33x and iop32x PCI to fixed i/o mapping and remove io.h. This
changes the PCI bus addresses from the cpu address to 0 based. It appears
that there is translation h/w for this, but its untested.

Not sure what to do with io_offset. I think it should always be 0.
AFAICT, PCI setup is skipped if the ATU is already setup.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Rob Herring 2012-07-04 11:18:40 -05:00
parent 0b9b18e016
commit dd9bf78040
6 changed files with 10 additions and 72 deletions
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2
arch/arm/Kconfig
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@ -495,7 +495,6 @@ config ARCH_IOP32X
bool "IOP32x-based"
depends on MMU
select CPU_XSCALE
select NEED_MACH_IO_H
select NEED_RET_TO_USER
select PLAT_IOP
select PCI
@ -508,7 +507,6 @@ config ARCH_IOP33X
bool "IOP33x-based"
depends on MMU
select CPU_XSCALE
select NEED_MACH_IO_H
select NEED_RET_TO_USER
select PLAT_IOP
select PCI

12
arch/arm/include/asm/hardware/iop3xx.h
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@ -217,18 +217,8 @@ extern int iop3xx_get_init_atu(void);
#define IOP3XX_PCI_LOWER_MEM_PA 0x80000000
#define IOP3XX_PCI_MEM_WINDOW_SIZE 0x08000000
#define IOP3XX_PCI_IO_WINDOW_SIZE 0x00010000
#define IOP3XX_PCI_LOWER_IO_PA 0x90000000
#define IOP3XX_PCI_LOWER_IO_VA 0xfe000000
#define IOP3XX_PCI_LOWER_IO_BA 0x90000000
#define IOP3XX_PCI_UPPER_IO_PA (IOP3XX_PCI_LOWER_IO_PA +\
IOP3XX_PCI_IO_WINDOW_SIZE - 1)
#define IOP3XX_PCI_UPPER_IO_VA (IOP3XX_PCI_LOWER_IO_VA +\
IOP3XX_PCI_IO_WINDOW_SIZE - 1)
#define IOP3XX_PCI_IO_PHYS_TO_VIRT(addr) (((u32) (addr) -\
IOP3XX_PCI_LOWER_IO_PA) +\
IOP3XX_PCI_LOWER_IO_VA)
#define IOP3XX_PCI_LOWER_IO_BA 0x00000000
#ifndef __ASSEMBLY__

19
arch/arm/mach-iop32x/include/mach/io.h
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@ -1,19 +0,0 @@
/*
* arch/arm/mach-iop32x/include/mach/io.h
*
* Copyright (C) 2001 MontaVista Software, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __IO_H
#define __IO_H
#include <asm/hardware/iop3xx.h>
#define IO_SPACE_LIMIT 0xffffffff
#define __io(p) ((void __iomem *)IOP3XX_PCI_IO_PHYS_TO_VIRT(p))
#endif

19
arch/arm/mach-iop33x/include/mach/io.h
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@ -1,19 +0,0 @@
/*
* arch/arm/mach-iop33x/include/mach/io.h
*
* Copyright (C) 2001 MontaVista Software, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __IO_H
#define __IO_H
#include <asm/hardware/iop3xx.h>
#define IO_SPACE_LIMIT 0xffffffff
#define __io(p) ((void __iomem *)IOP3XX_PCI_IO_PHYS_TO_VIRT(p))
#endif

25
arch/arm/plat-iop/pci.c
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@ -192,30 +192,24 @@ int iop3xx_pci_setup(int nr, struct pci_sys_data *sys)
if (nr != 0)
return 0;
res = kzalloc(2 * sizeof(struct resource), GFP_KERNEL);
res = kzalloc(sizeof(struct resource), GFP_KERNEL);
if (!res)
panic("PCI: unable to alloc resources");
res[0].start = IOP3XX_PCI_LOWER_IO_PA;
res[0].end = IOP3XX_PCI_LOWER_IO_PA + IOP3XX_PCI_IO_WINDOW_SIZE - 1;
res[0].name = "IOP3XX PCI I/O Space";
res[0].flags = IORESOURCE_IO;
request_resource(&ioport_resource, &res[0]);
res[1].start = IOP3XX_PCI_LOWER_MEM_PA;
res[1].end = IOP3XX_PCI_LOWER_MEM_PA + IOP3XX_PCI_MEM_WINDOW_SIZE - 1;
res[1].name = "IOP3XX PCI Memory Space";
res[1].flags = IORESOURCE_MEM;
request_resource(&iomem_resource, &res[1]);
res->start = IOP3XX_PCI_LOWER_MEM_PA;
res->end = IOP3XX_PCI_LOWER_MEM_PA + IOP3XX_PCI_MEM_WINDOW_SIZE - 1;
res->name = "IOP3XX PCI Memory Space";
res->flags = IORESOURCE_MEM;
request_resource(&iomem_resource, res);
/*
* Use whatever translation is already setup.
*/
sys->mem_offset = IOP3XX_PCI_LOWER_MEM_PA - *IOP3XX_OMWTVR0;
sys->io_offset = IOP3XX_PCI_LOWER_IO_PA - *IOP3XX_OIOWTVR;
pci_add_resource_offset(&sys->resources, &res[0], sys->io_offset);
pci_add_resource_offset(&sys->resources, &res[1], sys->mem_offset);
pci_add_resource_offset(&sys->resources, res, sys->mem_offset);
pci_ioremap_io(0, IOP3XX_PCI_LOWER_IO_PA);
return 1;
}
@ -367,7 +361,6 @@ void __init iop3xx_pci_preinit_cond(void)
void __init iop3xx_pci_preinit(void)
{
pcibios_min_io = 0;
pcibios_min_mem = 0;
iop3xx_atu_disable();

5
arch/arm/plat-iop/setup.c
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@ -25,11 +25,6 @@ static struct map_desc iop3xx_std_desc[] __initdata = {
.pfn = __phys_to_pfn(IOP3XX_PERIPHERAL_PHYS_BASE),
.length = IOP3XX_PERIPHERAL_SIZE,
.type = MT_UNCACHED,
}, { /* PCI IO space */
.virtual = IOP3XX_PCI_LOWER_IO_VA,
.pfn = __phys_to_pfn(IOP3XX_PCI_LOWER_IO_PA),
.length = IOP3XX_PCI_IO_WINDOW_SIZE,
.type = MT_DEVICE,
},
};