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linux-sg2042/arch/mips/mti-malta/malta-pci.c

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/*
* Copyright (C) 1999, 2000, 2004, 2005 MIPS Technologies, Inc.
* All rights reserved.
* Authors: Carsten Langgaard <carstenl@mips.com>
* Maciej W. Rozycki <macro@mips.com>
*
* Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* MIPS boards specific PCI support.
*/
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/gt64120.h>
#include <asm/mips-boards/generic.h>
#include <asm/mips-boards/bonito64.h>
#include <asm/mips-boards/msc01_pci.h>
static struct resource bonito64_mem_resource = {
.name = "Bonito PCI MEM",
.flags = IORESOURCE_MEM,
};
static struct resource bonito64_io_resource = {
.name = "Bonito PCI I/O",
.start = 0x00000000UL,
.end = 0x000fffffUL,
.flags = IORESOURCE_IO,
};
static struct resource gt64120_mem_resource = {
.name = "GT-64120 PCI MEM",
.flags = IORESOURCE_MEM,
};
static struct resource gt64120_io_resource = {
.name = "GT-64120 PCI I/O",
.flags = IORESOURCE_IO,
};
static struct resource msc_mem_resource = {
.name = "MSC PCI MEM",
.flags = IORESOURCE_MEM,
};
static struct resource msc_io_resource = {
.name = "MSC PCI I/O",
.flags = IORESOURCE_IO,
};
extern struct pci_ops bonito64_pci_ops;
extern struct pci_ops gt64xxx_pci0_ops;
extern struct pci_ops msc_pci_ops;
static struct pci_controller bonito64_controller = {
.pci_ops = &bonito64_pci_ops,
.io_resource = &bonito64_io_resource,
.mem_resource = &bonito64_mem_resource,
.io_offset = 0x00000000UL,
};
static struct pci_controller gt64120_controller = {
.pci_ops = &gt64xxx_pci0_ops,
.io_resource = &gt64120_io_resource,
.mem_resource = &gt64120_mem_resource,
};
static struct pci_controller msc_controller = {
.pci_ops = &msc_pci_ops,
.io_resource = &msc_io_resource,
.mem_resource = &msc_mem_resource,
};
void __init mips_pcibios_init(void)
{
struct pci_controller *controller;
resource_size_t start, end, map, start1, end1, map1, map2, map3, mask;
switch (mips_revision_sconid) {
case MIPS_REVISION_SCON_GT64120:
/*
* Due to a bug in the Galileo system controller, we need
* to setup the PCI BAR for the Galileo internal registers.
* This should be done in the bios/bootprom and will be
* fixed in a later revision of YAMON (the MIPS boards
* boot prom).
*/
GT_WRITE(GT_PCI0_CFGADDR_OFS,
(0 << GT_PCI0_CFGADDR_BUSNUM_SHF) | /* Local bus */
(0 << GT_PCI0_CFGADDR_DEVNUM_SHF) | /* GT64120 dev */
(0 << GT_PCI0_CFGADDR_FUNCTNUM_SHF) | /* Function 0*/
((0x20/4) << GT_PCI0_CFGADDR_REGNUM_SHF) | /* BAR 4*/
GT_PCI0_CFGADDR_CONFIGEN_BIT);
/* Perform the write */
GT_WRITE(GT_PCI0_CFGDATA_OFS, CPHYSADDR(MIPS_GT_BASE));
/* Set up resource ranges from the controller's registers. */
start = GT_READ(GT_PCI0M0LD_OFS);
end = GT_READ(GT_PCI0M0HD_OFS);
map = GT_READ(GT_PCI0M0REMAP_OFS);
end = (end & GT_PCI_HD_MSK) | (start & ~GT_PCI_HD_MSK);
start1 = GT_READ(GT_PCI0M1LD_OFS);
end1 = GT_READ(GT_PCI0M1HD_OFS);
map1 = GT_READ(GT_PCI0M1REMAP_OFS);
end1 = (end1 & GT_PCI_HD_MSK) | (start1 & ~GT_PCI_HD_MSK);
/* Cannot support multiple windows, use the wider. */
if (end1 - start1 > end - start) {
start = start1;
end = end1;
map = map1;
}
mask = ~(start ^ end);
/* We don't support remapping with a discontiguous mask. */
BUG_ON((start & GT_PCI_HD_MSK) != (map & GT_PCI_HD_MSK) &&
mask != ~((mask & -mask) - 1));
gt64120_mem_resource.start = start;
gt64120_mem_resource.end = end;
gt64120_controller.mem_offset = (start & mask) - (map & mask);
/* Addresses are 36-bit, so do shifts in the destinations. */
gt64120_mem_resource.start <<= GT_PCI_DCRM_SHF;
gt64120_mem_resource.end <<= GT_PCI_DCRM_SHF;
gt64120_mem_resource.end |= (1 << GT_PCI_DCRM_SHF) - 1;
gt64120_controller.mem_offset <<= GT_PCI_DCRM_SHF;
start = GT_READ(GT_PCI0IOLD_OFS);
end = GT_READ(GT_PCI0IOHD_OFS);
map = GT_READ(GT_PCI0IOREMAP_OFS);
end = (end & GT_PCI_HD_MSK) | (start & ~GT_PCI_HD_MSK);
mask = ~(start ^ end);
/* We don't support remapping with a discontiguous mask. */
BUG_ON((start & GT_PCI_HD_MSK) != (map & GT_PCI_HD_MSK) &&
mask != ~((mask & -mask) - 1));
gt64120_io_resource.start = map & mask;
gt64120_io_resource.end = (map & mask) | ~mask;
gt64120_controller.io_offset = 0;
/* Addresses are 36-bit, so do shifts in the destinations. */
gt64120_io_resource.start <<= GT_PCI_DCRM_SHF;
gt64120_io_resource.end <<= GT_PCI_DCRM_SHF;
gt64120_io_resource.end |= (1 << GT_PCI_DCRM_SHF) - 1;
controller = &gt64120_controller;
break;
case MIPS_REVISION_SCON_BONITO:
/* Set up resource ranges from the controller's registers. */
map = BONITO_PCIMAP;
map1 = (BONITO_PCIMAP & BONITO_PCIMAP_PCIMAP_LO0) >>
BONITO_PCIMAP_PCIMAP_LO0_SHIFT;
map2 = (BONITO_PCIMAP & BONITO_PCIMAP_PCIMAP_LO1) >>
BONITO_PCIMAP_PCIMAP_LO1_SHIFT;
map3 = (BONITO_PCIMAP & BONITO_PCIMAP_PCIMAP_LO2) >>
BONITO_PCIMAP_PCIMAP_LO2_SHIFT;
/* Combine as many adjacent windows as possible. */
map = map1;
start = BONITO_PCILO0_BASE;
end = 1;
if (map3 == map2 + 1) {
map = map2;
start = BONITO_PCILO1_BASE;
end++;
}
if (map2 == map1 + 1) {
map = map1;
start = BONITO_PCILO0_BASE;
end++;
}
bonito64_mem_resource.start = start;
bonito64_mem_resource.end = start +
BONITO_PCIMAP_WINBASE(end) - 1;
bonito64_controller.mem_offset = start -
BONITO_PCIMAP_WINBASE(map);
controller = &bonito64_controller;
break;
case MIPS_REVISION_SCON_SOCIT:
case MIPS_REVISION_SCON_ROCIT:
case MIPS_REVISION_SCON_SOCITSC:
case MIPS_REVISION_SCON_SOCITSCP:
/* Set up resource ranges from the controller's registers. */
MSC_READ(MSC01_PCI_SC2PMBASL, start);
MSC_READ(MSC01_PCI_SC2PMMSKL, mask);
MSC_READ(MSC01_PCI_SC2PMMAPL, map);
msc_mem_resource.start = start & mask;
msc_mem_resource.end = (start & mask) | ~mask;
msc_controller.mem_offset = (start & mask) - (map & mask);
MSC_READ(MSC01_PCI_SC2PIOBASL, start);
MSC_READ(MSC01_PCI_SC2PIOMSKL, mask);
MSC_READ(MSC01_PCI_SC2PIOMAPL, map);
msc_io_resource.start = map & mask;
msc_io_resource.end = (map & mask) | ~mask;
msc_controller.io_offset = 0;
ioport_resource.end = ~mask;
/* If ranges overlap I/O takes precedence. */
start = start & mask;
end = start | ~mask;
if ((start >= msc_mem_resource.start &&
start <= msc_mem_resource.end) ||
(end >= msc_mem_resource.start &&
end <= msc_mem_resource.end)) {
/* Use the larger space. */
start = max(start, msc_mem_resource.start);
end = min(end, msc_mem_resource.end);
if (start - msc_mem_resource.start >=
msc_mem_resource.end - end)
msc_mem_resource.end = start - 1;
else
msc_mem_resource.start = end + 1;
}
controller = &msc_controller;
break;
default:
return;
}
if (controller->io_resource->start < 0x00001000UL) /* FIXME */
controller->io_resource->start = 0x00001000UL;
iomem_resource.end &= 0xfffffffffULL; /* 64 GB */
ioport_resource.end = controller->io_resource->end;
register_pci_controller(controller);
}
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