arch/sh/drivers/pci/fixups-landisk.c

   1 /*
   2  * arch/sh/drivers/pci/fixups-landisk.c
   3  *
   4  * PCI initialization for the I-O DATA Device, Inc. LANDISK board
   5  *
   6  * Copyright (C) 2006 kogiidena
   7  * Copyright (C) 2010 Nobuhiro Iwamatsu
   8  *
   9  * May be copied or modified under the terms of the GNU General Public
  10  * License.  See linux/COPYING for more information.
  11  */
  12 #include <linux/kernel.h>
  13 #include <linux/types.h>
  14 #include <linux/init.h>
  15 #include <linux/delay.h>
  16 #include <linux/pci.h>
  17 #include "pci-sh4.h"
  18
  19 #define PCIMCR_MRSET_OFF        0xBFFFFFFF
  20 #define PCIMCR_RFSH_OFF         0xFFFFFFFB
  21
  22 int pcibios_map_platform_irq(const struct pci_dev *pdev, u8 slot, u8 pin)
  23 {
  24         /*
  25          * slot0: pin1-4 = irq5,6,7,8
  26          * slot1: pin1-4 = irq6,7,8,5
  27          * slot2: pin1-4 = irq7,8,5,6
  28          * slot3: pin1-4 = irq8,5,6,7
  29          */
  30         int irq = ((slot + pin - 1) & 0x3) + 5;
  31
  32         if ((slot | (pin - 1)) > 0x3) {
  33                 printk(KERN_WARNING "PCI: Bad IRQ mapping request for slot %d pin %c\n",
  34                        slot, pin - 1 + 'A');
  35                 return -1;
  36         }
  37         return irq;
  38 }
  39
  40 int pci_fixup_pcic(struct pci_channel *chan)
  41 {
  42         unsigned long bcr1, mcr;
  43
  44         bcr1 = __raw_readl(SH7751_BCR1);
  45         bcr1 |= 0x40080000;     /* Enable Bit 19 BREQEN, set PCIC to slave */
  46         pci_write_reg(chan, bcr1, SH4_PCIBCR1);
  47
  48         mcr = __raw_readl(SH7751_MCR);
  49         mcr = (mcr & PCIMCR_MRSET_OFF) & PCIMCR_RFSH_OFF;
  50         pci_write_reg(chan, mcr, SH4_PCIMCR);
  51
  52         pci_write_reg(chan, 0x0c000000, SH7751_PCICONF5);
  53         pci_write_reg(chan, 0xd0000000, SH7751_PCICONF6);
  54         pci_write_reg(chan, 0x0c000000, SH4_PCILAR0);
  55         pci_write_reg(chan, 0x00000000, SH4_PCILAR1);
  56
  57         return 0;
  58 }