From: Rob Herring <rob.herring@calxeda.com>
Date: Fri, 2 Mar 2012 02:48:12 +0000 (-0600)
Subject: ARM: footbridge: use fixed PCI i/o mapping
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8ef6e6201b26cb9fde79c1baa08145af6aca2815;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git
ARM: footbridge: use fixed PCI i/o mapping
Move footbridge PCI to fixed i/o mapping. io.h is still needed for the
!MMU case.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
---
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 3dfc555219b5..7215ebfcd6cb 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -431,7 +431,7 @@ config ARCH_FOOTBRIDGE
select FOOTBRIDGE
select GENERIC_CLOCKEVENTS
select HAVE_IDE
- select NEED_MACH_IO_H
+ select NEED_MACH_IO_H if !MMU
select NEED_MACH_MEMORY_H
help
Support for systems based on the DC21285 companion chip
diff --git a/arch/arm/mach-footbridge/common.c b/arch/arm/mach-footbridge/common.c
index 3e6aaa6361da..a42b369bc439 100644
--- a/arch/arm/mach-footbridge/common.c
+++ b/arch/arm/mach-footbridge/common.c
@@ -15,7 +15,7 @@
#include <linux/init.h>
#include <linux/io.h>
#include <linux/spinlock.h>
-
+
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/irq.h>
@@ -26,6 +26,7 @@
#include <asm/mach/irq.h>
#include <asm/mach/map.h>
+#include <asm/mach/pci.h>
#include "common.h"
@@ -175,11 +176,6 @@ static struct map_desc ebsa285_host_io_desc[] __initdata = {
.pfn = __phys_to_pfn(DC21285_PCI_IACK),
.length = PCIIACK_SIZE,
.type = MT_DEVICE,
- }, {
- .virtual = PCIO_BASE,
- .pfn = __phys_to_pfn(DC21285_PCI_IO),
- .length = PCIO_SIZE,
- .type = MT_DEVICE,
},
#endif
};
@@ -196,8 +192,10 @@ void __init footbridge_map_io(void)
* Now, work out what we've got to map in addition on this
* platform.
*/
- if (footbridge_cfn_mode())
+ if (footbridge_cfn_mode()) {
iotable_init(ebsa285_host_io_desc, ARRAY_SIZE(ebsa285_host_io_desc));
+ pci_map_io_early(__phys_to_pfn(DC21285_PCI_IO));
+ }
}
void footbridge_restart(char mode, const char *cmd)
diff --git a/arch/arm/mach-footbridge/dc21285.c b/arch/arm/mach-footbridge/dc21285.c
index 9d62e3381024..a7cd2cf5e08d 100644
--- a/arch/arm/mach-footbridge/dc21285.c
+++ b/arch/arm/mach-footbridge/dc21285.c
@@ -276,8 +276,8 @@ int __init dc21285_setup(int nr, struct pci_sys_data *sys)
sys->mem_offset = DC21285_PCI_MEM;
- pci_add_resource_offset(&sys->resources,
- &ioport_resource, sys->io_offset);
+ pci_ioremap_io(0, DC21285_PCI_IO);
+
pci_add_resource_offset(&sys->resources, &res[0], sys->mem_offset);
pci_add_resource_offset(&sys->resources, &res[1], sys->mem_offset);
@@ -298,7 +298,7 @@ void __init dc21285_preinit(void)
mem_size = (unsigned int)high_memory - PAGE_OFFSET;
for (mem_mask = 0x00100000; mem_mask < 0x10000000; mem_mask <<= 1)
if (mem_mask >= mem_size)
- break;
+ break;
/*
* These registers need to be set up whether we're the
@@ -350,14 +350,6 @@ void __init dc21285_preinit(void)
"PCI data parity", NULL);
if (cfn_mode) {
- static struct resource csrio;
-
- csrio.flags = IORESOURCE_IO;
- csrio.name = "Footbridge";
-
- allocate_resource(&ioport_resource, &csrio, 128,
- 0xff00, 0xffff, 128, NULL, NULL);
-
/*
* Map our SDRAM at a known address in PCI space, just in case
* the firmware had other ideas. Using a nonzero base is
@@ -365,7 +357,7 @@ void __init dc21285_preinit(void)
* in the range 0x000a0000 to 0x000c0000. (eg, S3 cards).
*/
*CSR_PCICSRBASE = 0xf4000000;
- *CSR_PCICSRIOBASE = csrio.start;
+ *CSR_PCICSRIOBASE = 0;
*CSR_PCISDRAMBASE = __virt_to_bus(PAGE_OFFSET);
*CSR_PCIROMBASE = 0;
*CSR_PCICMD = PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
diff --git a/arch/arm/mach-footbridge/include/mach/debug-macro.S b/arch/arm/mach-footbridge/include/mach/debug-macro.S
index e5acde25ffc5..c169f0c99b2a 100644
--- a/arch/arm/mach-footbridge/include/mach/debug-macro.S
+++ b/arch/arm/mach-footbridge/include/mach/debug-macro.S
@@ -17,7 +17,8 @@
/* For NetWinder debugging */
.macro addruart, rp, rv, tmp
mov \rp, #0x000003f8
- orr \rv, \rp, #0xff000000 @ virtual
+ orr \rv, \rp, #0xfe000000 @ virtual
+ orr \rv, \rv, #0x00e00000 @ virtual
orr \rp, \rp, #0x7c000000 @ physical
.endm
diff --git a/arch/arm/mach-footbridge/include/mach/io.h b/arch/arm/mach-footbridge/include/mach/io.h
index aba531eebbc6..aba46388cc0c 100644
--- a/arch/arm/mach-footbridge/include/mach/io.h
+++ b/arch/arm/mach-footbridge/include/mach/io.h
@@ -14,18 +14,10 @@
#ifndef __ASM_ARM_ARCH_IO_H
#define __ASM_ARM_ARCH_IO_H
-#ifdef CONFIG_MMU
-#define MMU_IO(a, b) (a)
-#else
-#define MMU_IO(a, b) (b)
-#endif
-
-#define PCIO_SIZE 0x00100000
-#define PCIO_BASE MMU_IO(0xff000000, 0x7c000000)
-
/*
- * Translation of various region addresses to virtual addresses
+ * Translation of various i/o addresses to host addresses for !CONFIG_MMU
*/
+#define PCIO_BASE 0x7c000000
#define __io(a) ((void __iomem *)(PCIO_BASE + (a)))
#endif