Logo Search packages:      
Sourcecode: linux version File versions  Download package

malta-pci.c

/*
 * 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/gcmpregs.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);
#ifdef CONFIG_MIPS_CMP
            if (gcmp_niocu())
                  gcmp_setregion(0, start, mask,
                        GCMP_GCB_GCMPB_CMDEFTGT_IOCU1);
#endif
            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;
#ifdef CONFIG_MIPS_CMP
            if (gcmp_niocu())
                  gcmp_setregion(1, start, mask,
                        GCMP_GCB_GCMPB_CMDEFTGT_IOCU1);
#endif
            /* 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);
}

/* Enable PCI 2.1 compatibility in PIIX4 */
static void __init quirk_dlcsetup(struct pci_dev *dev)
{
      u8 odlc, ndlc;
      (void) pci_read_config_byte(dev, 0x82, &odlc);
      /* Enable passive releases and delayed transaction */
      ndlc = odlc | 7;
      (void) pci_write_config_byte(dev, 0x82, ndlc);
}

DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_0,
      quirk_dlcsetup);

Generated by  Doxygen 1.6.0   Back to index