255 lines
7.9 KiB
C
255 lines
7.9 KiB
C
/*
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* Copyright (C) 1999, 2000, 2004, 2005 MIPS Technologies, Inc.
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* All rights reserved.
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* Authors: Carsten Langgaard <carstenl@mips.com>
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* Maciej W. Rozycki <macro@mips.com>
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*
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* Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
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*
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* This program is free software; you can distribute it and/or modify it
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* under the terms of the GNU General Public License (Version 2) as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* MIPS boards specific PCI support.
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*/
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <asm/gt64120.h>
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#include <asm/mips-cm.h>
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#include <asm/mips-boards/generic.h>
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#include <asm/mips-boards/bonito64.h>
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#include <asm/mips-boards/msc01_pci.h>
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static struct resource bonito64_mem_resource = {
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.name = "Bonito PCI MEM",
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.flags = IORESOURCE_MEM,
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};
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static struct resource bonito64_io_resource = {
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.name = "Bonito PCI I/O",
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.start = 0x00000000UL,
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.end = 0x000fffffUL,
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.flags = IORESOURCE_IO,
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};
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static struct resource gt64120_mem_resource = {
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.name = "GT-64120 PCI MEM",
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.flags = IORESOURCE_MEM,
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};
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static struct resource gt64120_io_resource = {
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.name = "GT-64120 PCI I/O",
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.flags = IORESOURCE_IO,
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};
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static struct resource msc_mem_resource = {
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.name = "MSC PCI MEM",
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.flags = IORESOURCE_MEM,
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};
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static struct resource msc_io_resource = {
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.name = "MSC PCI I/O",
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.flags = IORESOURCE_IO,
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};
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extern struct pci_ops bonito64_pci_ops;
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extern struct pci_ops gt64xxx_pci0_ops;
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extern struct pci_ops msc_pci_ops;
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static struct pci_controller bonito64_controller = {
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.pci_ops = &bonito64_pci_ops,
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.io_resource = &bonito64_io_resource,
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.mem_resource = &bonito64_mem_resource,
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.io_offset = 0x00000000UL,
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};
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static struct pci_controller gt64120_controller = {
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.pci_ops = >64xxx_pci0_ops,
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.io_resource = >64120_io_resource,
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.mem_resource = >64120_mem_resource,
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};
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static struct pci_controller msc_controller = {
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.pci_ops = &msc_pci_ops,
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.io_resource = &msc_io_resource,
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.mem_resource = &msc_mem_resource,
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};
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void __init mips_pcibios_init(void)
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{
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struct pci_controller *controller;
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resource_size_t start, end, map, start1, end1, map1, map2, map3, mask;
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switch (mips_revision_sconid) {
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case MIPS_REVISION_SCON_GT64120:
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/*
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* Due to a bug in the Galileo system controller, we need
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* to setup the PCI BAR for the Galileo internal registers.
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* This should be done in the bios/bootprom and will be
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* fixed in a later revision of YAMON (the MIPS boards
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* boot prom).
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*/
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GT_WRITE(GT_PCI0_CFGADDR_OFS,
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(0 << GT_PCI0_CFGADDR_BUSNUM_SHF) | /* Local bus */
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(0 << GT_PCI0_CFGADDR_DEVNUM_SHF) | /* GT64120 dev */
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(0 << GT_PCI0_CFGADDR_FUNCTNUM_SHF) | /* Function 0*/
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((0x20/4) << GT_PCI0_CFGADDR_REGNUM_SHF) | /* BAR 4*/
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GT_PCI0_CFGADDR_CONFIGEN_BIT);
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/* Perform the write */
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GT_WRITE(GT_PCI0_CFGDATA_OFS, CPHYSADDR(MIPS_GT_BASE));
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/* Set up resource ranges from the controller's registers. */
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start = GT_READ(GT_PCI0M0LD_OFS);
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end = GT_READ(GT_PCI0M0HD_OFS);
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map = GT_READ(GT_PCI0M0REMAP_OFS);
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end = (end & GT_PCI_HD_MSK) | (start & ~GT_PCI_HD_MSK);
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start1 = GT_READ(GT_PCI0M1LD_OFS);
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end1 = GT_READ(GT_PCI0M1HD_OFS);
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map1 = GT_READ(GT_PCI0M1REMAP_OFS);
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end1 = (end1 & GT_PCI_HD_MSK) | (start1 & ~GT_PCI_HD_MSK);
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/* Cannot support multiple windows, use the wider. */
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if (end1 - start1 > end - start) {
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start = start1;
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end = end1;
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map = map1;
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}
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mask = ~(start ^ end);
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/* We don't support remapping with a discontiguous mask. */
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BUG_ON((start & GT_PCI_HD_MSK) != (map & GT_PCI_HD_MSK) &&
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mask != ~((mask & -mask) - 1));
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gt64120_mem_resource.start = start;
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gt64120_mem_resource.end = end;
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gt64120_controller.mem_offset = (start & mask) - (map & mask);
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/* Addresses are 36-bit, so do shifts in the destinations. */
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gt64120_mem_resource.start <<= GT_PCI_DCRM_SHF;
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gt64120_mem_resource.end <<= GT_PCI_DCRM_SHF;
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gt64120_mem_resource.end |= (1 << GT_PCI_DCRM_SHF) - 1;
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gt64120_controller.mem_offset <<= GT_PCI_DCRM_SHF;
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start = GT_READ(GT_PCI0IOLD_OFS);
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end = GT_READ(GT_PCI0IOHD_OFS);
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map = GT_READ(GT_PCI0IOREMAP_OFS);
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end = (end & GT_PCI_HD_MSK) | (start & ~GT_PCI_HD_MSK);
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mask = ~(start ^ end);
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/* We don't support remapping with a discontiguous mask. */
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BUG_ON((start & GT_PCI_HD_MSK) != (map & GT_PCI_HD_MSK) &&
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mask != ~((mask & -mask) - 1));
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gt64120_io_resource.start = map & mask;
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gt64120_io_resource.end = (map & mask) | ~mask;
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gt64120_controller.io_offset = 0;
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/* Addresses are 36-bit, so do shifts in the destinations. */
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gt64120_io_resource.start <<= GT_PCI_DCRM_SHF;
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gt64120_io_resource.end <<= GT_PCI_DCRM_SHF;
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gt64120_io_resource.end |= (1 << GT_PCI_DCRM_SHF) - 1;
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controller = >64120_controller;
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break;
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case MIPS_REVISION_SCON_BONITO:
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/* Set up resource ranges from the controller's registers. */
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map = BONITO_PCIMAP;
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map1 = (BONITO_PCIMAP & BONITO_PCIMAP_PCIMAP_LO0) >>
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BONITO_PCIMAP_PCIMAP_LO0_SHIFT;
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map2 = (BONITO_PCIMAP & BONITO_PCIMAP_PCIMAP_LO1) >>
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BONITO_PCIMAP_PCIMAP_LO1_SHIFT;
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map3 = (BONITO_PCIMAP & BONITO_PCIMAP_PCIMAP_LO2) >>
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BONITO_PCIMAP_PCIMAP_LO2_SHIFT;
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/* Combine as many adjacent windows as possible. */
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map = map1;
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start = BONITO_PCILO0_BASE;
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end = 1;
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if (map3 == map2 + 1) {
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map = map2;
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start = BONITO_PCILO1_BASE;
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end++;
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}
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if (map2 == map1 + 1) {
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map = map1;
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start = BONITO_PCILO0_BASE;
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end++;
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}
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bonito64_mem_resource.start = start;
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bonito64_mem_resource.end = start +
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BONITO_PCIMAP_WINBASE(end) - 1;
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bonito64_controller.mem_offset = start -
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BONITO_PCIMAP_WINBASE(map);
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controller = &bonito64_controller;
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break;
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case MIPS_REVISION_SCON_SOCIT:
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case MIPS_REVISION_SCON_ROCIT:
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case MIPS_REVISION_SCON_SOCITSC:
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case MIPS_REVISION_SCON_SOCITSCP:
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/* Set up resource ranges from the controller's registers. */
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MSC_READ(MSC01_PCI_SC2PMBASL, start);
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MSC_READ(MSC01_PCI_SC2PMMSKL, mask);
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MSC_READ(MSC01_PCI_SC2PMMAPL, map);
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msc_mem_resource.start = start & mask;
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msc_mem_resource.end = (start & mask) | ~mask;
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msc_controller.mem_offset = (start & mask) - (map & mask);
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if (mips_cm_numiocu()) {
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write_gcr_reg0_base(start);
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write_gcr_reg0_mask(mask |
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CM_GCR_REGn_MASK_CMTGT_IOCU0);
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}
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MSC_READ(MSC01_PCI_SC2PIOBASL, start);
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MSC_READ(MSC01_PCI_SC2PIOMSKL, mask);
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MSC_READ(MSC01_PCI_SC2PIOMAPL, map);
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msc_io_resource.start = map & mask;
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msc_io_resource.end = (map & mask) | ~mask;
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msc_controller.io_offset = 0;
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ioport_resource.end = ~mask;
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if (mips_cm_numiocu()) {
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write_gcr_reg1_base(start);
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write_gcr_reg1_mask(mask |
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CM_GCR_REGn_MASK_CMTGT_IOCU0);
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}
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/* If ranges overlap I/O takes precedence. */
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start = start & mask;
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end = start | ~mask;
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if ((start >= msc_mem_resource.start &&
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start <= msc_mem_resource.end) ||
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(end >= msc_mem_resource.start &&
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end <= msc_mem_resource.end)) {
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/* Use the larger space. */
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start = max(start, msc_mem_resource.start);
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end = min(end, msc_mem_resource.end);
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if (start - msc_mem_resource.start >=
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msc_mem_resource.end - end)
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msc_mem_resource.end = start - 1;
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else
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msc_mem_resource.start = end + 1;
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}
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controller = &msc_controller;
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break;
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default:
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return;
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}
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/* PIIX4 ACPI starts at 0x1000 */
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if (controller->io_resource->start < 0x00001000UL)
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controller->io_resource->start = 0x00001000UL;
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iomem_resource.end &= 0xfffffffffULL; /* 64 GB */
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ioport_resource.end = controller->io_resource->end;
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controller->io_map_base = mips_io_port_base;
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register_pci_controller(controller);
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}
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