arch/mips/pci/fixup-au1000.c

   1 /*
   2  * BRIEF MODULE DESCRIPTION
   3  *      Board specific pci fixups.
   4  *
   5  * Copyright 2001-2003 MontaVista Software Inc.
   6  * Author: MontaVista Software, Inc.
   7  *              ppopov@mvista.com or source@mvista.com
   8  *
   9  *  This program is free software; you can redistribute  it and/or modify it
  10  *  under  the terms of  the GNU General  Public License as published by the
  11  *  Free Software Foundation;  either version 2 of the  License, or (at your
  12  *  option) any later version.
  13  *
  14  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  15  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  16  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  17  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  18  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  20  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  21  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  22  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  *
  25  *  You should have received a copy of the  GNU General Public License along
  26  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  27  *  675 Mass Ave, Cambridge, MA 02139, USA.
  28  */
  29 #include <linux/config.h>
  30 #include <linux/types.h>
  31 #include <linux/pci.h>
  32 #include <linux/kernel.h>
  33 #include <linux/init.h>
  34
  35 #include <asm/au1000.h>
  36 //#include <asm/pb1500.h>
  37 #ifdef CONFIG_MIPS_PB1000
  38 #include <asm/pb1000.h>
  39 #endif
  40
  41 #undef  DEBUG
  42 #ifdef  DEBUG
  43 #define DBG(x...)       printk(x)
  44 #else
  45 #define DBG(x...)
  46 #endif
  47
  48 static void fixup_resource(int r_num, struct pci_dev *dev);
  49 #ifdef CONFIG_SOC_AU1500
  50 static unsigned long virt_io_addr;
  51 #endif
  52
  53 void __init pcibios_fixup_resources(struct pci_dev *dev)
  54 {
  55         /* will need to fixup IO resources */
  56 }
  57
  58 void __init pcibios_fixup(void)
  59 {
  60 #ifdef CONFIG_SOC_AU1500
  61         int i;
  62         struct pci_dev *dev;
  63
  64         virt_io_addr = (unsigned long) ioremap(Au1500_PCI_IO_START,
  65                                                Au1500_PCI_IO_END -
  66                                                Au1500_PCI_IO_START + 1);
  67
  68         if (!virt_io_addr) {
  69                 printk(KERN_ERR "Unable to ioremap pci space\n");
  70                 return;
  71         }
  72
  73         set_io_port_base(virt_io_addr);
  74 #endif
  75
  76 #ifdef CONFIG_MIPS_PB1000       /* This is truly board specific */
  77         unsigned long pci_mem_start = (unsigned long) PCI_MEM_START;
  78
  79         au_writel(0, PCI_BRIDGE_CONFIG);        // set extend byte to 0
  80         au_writel(0, SDRAM_MBAR);       // set mbar to 0
  81         au_writel(0x2, SDRAM_CMD);      // enable memory accesses
  82         au_sync_delay(1);
  83
  84         // set extend byte to mbar of ext slot
  85         au_writel(((pci_mem_start >> 24) & 0xff) |
  86                   (1 << 8 | 1 << 9 | 1 << 10 | 1 << 27),
  87                   PCI_BRIDGE_CONFIG);
  88         DBG("Set bridge config to %x\n", au_readl(PCI_BRIDGE_CONFIG));
  89 #endif
  90 }
  91
  92 void __init pcibios_fixup_irqs(void)
  93 {
  94 #ifdef CONFIG_SOC_AU1500
  95         unsigned int slot, func;
  96         unsigned char pin;
  97         struct pci_dev *dev;
  98
  99         pci_for_each_dev(dev) {
 100                 if (dev->bus->number != 0)
 101                         return;
 102
 103                 dev->irq = 0xff;
 104                 slot = PCI_SLOT(dev->devfn);
 105                 switch (slot) {
 106                 case 12:
 107                 case 13:
 108                         dev->irq = AU1000_PCI_INTA;
 109                         break;
 110
 111                 }
 112                 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
 113                 DBG("slot %d irq %d\n", slot, dev->irq);
 114         }
 115 #endif
 116 }
 117 unsigned int pcibios_assign_all_busses(void)
 118 {
 119         return 0;
 120 }
 121
 122 static void fixup_resource(int r_num, struct pci_dev *dev)
 123 {
 124 }