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ARM: mv78xx0: use fixed pci i/o mapping 

Move mv78xx0 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.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Rob Herring 2012-07-09 23:26:58 -05:00
parent e7adf1e0a5
commit 0b9b18e016
6 changed files with 47 additions and 121 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/Kconfig
View File

@ -571,7 +571,6 @@ config ARCH_MV78XX0
select PCI
select ARCH_REQUIRE_GPIOLIB
select GENERIC_CLOCKEVENTS
select NEED_MACH_IO_H
select PLAT_ORION
help
Support for the following Marvell MV78xx0 series SoCs:

3
arch/arm/mach-mv78xx0/addr-map.c
View File

@ -13,6 +13,7 @@
#include <linux/mbus.h>
#include <linux/io.h>
#include <plat/addr-map.h>
#include <mach/mv78xx0.h>
#include "common.h"
/*
@ -81,7 +82,7 @@ void __init mv78xx0_setup_pcie_io_win(int window, u32 base, u32 size,
int maj, int min)
{
orion_setup_cpu_win(&addr_map_cfg, window, base, size,
TARGET_PCIE(maj), ATTR_PCIE_IO(min), -1);
TARGET_PCIE(maj), ATTR_PCIE_IO(min), 0);
}
void __init mv78xx0_setup_pcie_mem_win(int window, u32 base, u32 size,

5
arch/arm/mach-mv78xx0/common.c
View File

@ -134,11 +134,6 @@ static struct map_desc mv78xx0_io_desc[] __initdata = {
.pfn = 0,
.length = MV78XX0_CORE_REGS_SIZE,
.type = MT_DEVICE,
}, {
.virtual = MV78XX0_PCIE_IO_VIRT_BASE(0),
.pfn = __phys_to_pfn(MV78XX0_PCIE_IO_PHYS_BASE(0)),
.length = MV78XX0_PCIE_IO_SIZE * 8,
.type = MT_DEVICE,
}, {
.virtual = MV78XX0_REGS_VIRT_BASE,
.pfn = __phys_to_pfn(MV78XX0_REGS_PHYS_BASE),

24
arch/arm/mach-mv78xx0/include/mach/io.h
View File

@ -1,24 +0,0 @@
/*
* arch/arm/mach-mv78xx0/include/mach/io.h
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#ifndef __ASM_ARCH_IO_H
#define __ASM_ARCH_IO_H
#include "mv78xx0.h"
#define IO_SPACE_LIMIT 0xffffffff
static inline void __iomem *__io(unsigned long addr)
{
return (void __iomem *)((addr - MV78XX0_PCIE_IO_PHYS_BASE(0))
+ MV78XX0_PCIE_IO_VIRT_BASE(0));
}
#define __io(a) __io(a)
#endif

21
arch/arm/mach-mv78xx0/include/mach/mv78xx0.h
View File

@ -29,15 +29,15 @@
*
* virt phys size
* fe400000 f102x000 16K core-specific peripheral registers
* fe700000 f0800000 1M PCIe #0 I/O space
* fe800000 f0900000 1M PCIe #1 I/O space
* fe900000 f0a00000 1M PCIe #2 I/O space
* fea00000 f0b00000 1M PCIe #3 I/O space
* feb00000 f0c00000 1M PCIe #4 I/O space
* fec00000 f0d00000 1M PCIe #5 I/O space
* fed00000 f0e00000 1M PCIe #6 I/O space
* fee00000 f0f00000 1M PCIe #7 I/O space
* fef00000 f1000000 1M on-chip peripheral registers
* fee00000 f0800000 64K PCIe #0 I/O space
* fee10000 f0900000 64K PCIe #1 I/O space
* fee20000 f0a00000 64K PCIe #2 I/O space
* fee30000 f0b00000 64K PCIe #3 I/O space
* fee40000 f0c00000 64K PCIe #4 I/O space
* fee50000 f0d00000 64K PCIe #5 I/O space
* fee60000 f0e00000 64K PCIe #6 I/O space
* fee70000 f0f00000 64K PCIe #7 I/O space
* fd000000 f1000000 1M on-chip peripheral registers
*/
#define MV78XX0_CORE0_REGS_PHYS_BASE 0xf1020000
#define MV78XX0_CORE1_REGS_PHYS_BASE 0xf1024000
@ -46,11 +46,10 @@
#define MV78XX0_CORE_REGS_SIZE SZ_16K
#define MV78XX0_PCIE_IO_PHYS_BASE(i) (0xf0800000 + ((i) << 20))
#define MV78XX0_PCIE_IO_VIRT_BASE(i) (0xfe700000 + ((i) << 20))
#define MV78XX0_PCIE_IO_SIZE SZ_1M
#define MV78XX0_REGS_PHYS_BASE 0xf1000000
#define MV78XX0_REGS_VIRT_BASE 0xfef00000
#define MV78XX0_REGS_VIRT_BASE 0xfd000000
#define MV78XX0_REGS_SIZE SZ_1M
#define MV78XX0_PCIE_MEM_PHYS_BASE 0xc0000000

110
arch/arm/mach-mv78xx0/pcie.c
View File

@ -15,6 +15,7 @@
#include <asm/mach/pci.h>
#include <plat/pcie.h>
#include <plat/addr-map.h>
#include <mach/mv78xx0.h>
#include "common.h"
struct pcie_port {
@ -23,16 +24,13 @@ struct pcie_port {
u8 root_bus_nr;
void __iomem *base;
spinlock_t conf_lock;
char io_space_name[16];
char mem_space_name[16];
struct resource res[2];
struct resource res;
};
static struct pcie_port pcie_port[8];
static int num_pcie_ports;
static struct resource pcie_io_space;
static struct resource pcie_mem_space;
void __init mv78xx0_pcie_id(u32 *dev, u32 *rev)
{
@ -40,101 +38,58 @@ void __init mv78xx0_pcie_id(u32 *dev, u32 *rev)
*rev = orion_pcie_rev((void __iomem *)PCIE00_VIRT_BASE);
}
u32 pcie_port_size[8] = {
0,
0x30000000,
0x10000000,
0x10000000,
0x08000000,
0x08000000,
0x08000000,
0x04000000,
};
static void __init mv78xx0_pcie_preinit(void)
{
int i;
u32 size_each;
u32 start;
int win;
int win = 0;
pcie_io_space.name = "PCIe I/O Space";
pcie_io_space.start = MV78XX0_PCIE_IO_PHYS_BASE(0);
pcie_io_space.end =
MV78XX0_PCIE_IO_PHYS_BASE(0) + MV78XX0_PCIE_IO_SIZE * 8 - 1;
pcie_io_space.flags = IORESOURCE_IO;
pcie_io_space.flags = IORESOURCE_MEM;
if (request_resource(&iomem_resource, &pcie_io_space))
panic("can't allocate PCIe I/O space");
pcie_mem_space.name = "PCIe MEM Space";
pcie_mem_space.start = MV78XX0_PCIE_MEM_PHYS_BASE;
pcie_mem_space.end =
MV78XX0_PCIE_MEM_PHYS_BASE + MV78XX0_PCIE_MEM_SIZE - 1;
pcie_mem_space.flags = IORESOURCE_MEM;
if (request_resource(&iomem_resource, &pcie_mem_space))
panic("can't allocate PCIe MEM space");
for (i = 0; i < num_pcie_ports; i++) {
struct pcie_port *pp = pcie_port + i;
snprintf(pp->io_space_name, sizeof(pp->io_space_name),
"PCIe %d.%d I/O", pp->maj, pp->min);
pp->io_space_name[sizeof(pp->io_space_name) - 1] = 0;
pp->res[0].name = pp->io_space_name;
pp->res[0].start = MV78XX0_PCIE_IO_PHYS_BASE(i);
pp->res[0].end = pp->res[0].start + MV78XX0_PCIE_IO_SIZE - 1;
pp->res[0].flags = IORESOURCE_IO;
snprintf(pp->mem_space_name, sizeof(pp->mem_space_name),
"PCIe %d.%d MEM", pp->maj, pp->min);
pp->mem_space_name[sizeof(pp->mem_space_name) - 1] = 0;
pp->res[1].name = pp->mem_space_name;
pp->res[1].flags = IORESOURCE_MEM;
}
switch (num_pcie_ports) {
case 0:
size_each = 0;
break;
case 1:
size_each = 0x30000000;
break;
case 2 ... 3:
size_each = 0x10000000;
break;
case 4 ... 6:
size_each = 0x08000000;
break;
case 7:
size_each = 0x04000000;
break;
default:
if (num_pcie_ports > 7)
panic("invalid number of PCIe ports");
}
size_each = pcie_port_size[num_pcie_ports];
start = MV78XX0_PCIE_MEM_PHYS_BASE;
for (i = 0; i < num_pcie_ports; i++) {
struct pcie_port *pp = pcie_port + i;
pp->res[1].start = start;
pp->res[1].end = start + size_each - 1;
snprintf(pp->mem_space_name, sizeof(pp->mem_space_name),
"PCIe %d.%d MEM", pp->maj, pp->min);
pp->mem_space_name[sizeof(pp->mem_space_name) - 1] = 0;
pp->res.name = pp->mem_space_name;
pp->res.flags = IORESOURCE_MEM;
pp->res.start = start;
pp->res.end = start + size_each - 1;
start += size_each;
}
for (i = 0; i < num_pcie_ports; i++) {
struct pcie_port *pp = pcie_port + i;
if (request_resource(&pcie_io_space, &pp->res[0]))
panic("can't allocate PCIe I/O sub-space");
if (request_resource(&pcie_mem_space, &pp->res[1]))
if (request_resource(&iomem_resource, &pp->res))
panic("can't allocate PCIe MEM sub-space");
}
win = 0;
for (i = 0; i < num_pcie_ports; i++) {
struct pcie_port *pp = pcie_port + i;
mv78xx0_setup_pcie_io_win(win++, pp->res[0].start,
resource_size(&pp->res[0]),
mv78xx0_setup_pcie_mem_win(win + i + 8, pp->res.start,
resource_size(&pp->res),
pp->maj, pp->min);
mv78xx0_setup_pcie_mem_win(win++, pp->res[1].start,
resource_size(&pp->res[1]),
mv78xx0_setup_pcie_io_win(win + i, i * SZ_64K, SZ_64K,
pp->maj, pp->min);
}
}
@ -156,8 +111,9 @@ static int __init mv78xx0_pcie_setup(int nr, struct pci_sys_data *sys)
orion_pcie_set_local_bus_nr(pp->base, sys->busnr);
orion_pcie_setup(pp->base);
pci_add_resource_offset(&sys->resources, &pp->res[0], sys->io_offset);
pci_add_resource_offset(&sys->resources, &pp->res[1], sys->mem_offset);
pci_ioremap_io(nr * SZ_64K, MV78XX0_PCIE_IO_PHYS_BASE(nr));
pci_add_resource_offset(&sys->resources, &pp->res, sys->mem_offset);
return 1;
}
@ -281,7 +237,7 @@ static void __init add_pcie_port(int maj, int min, unsigned long base)
pp->root_bus_nr = -1;
pp->base = (void __iomem *)base;
spin_lock_init(&pp->conf_lock);
memset(pp->res, 0, sizeof(pp->res));
memset(&pp->res, 0, sizeof(pp->res));
} else {
printk("link down, ignoring\n");
}