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

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * arch/sh/drivers/pci/fixups-landisk.c
   4  *
   5  * PCI initialization for the I-O DATA Device, Inc. LANDISK board
   6  *
   7  * Copyright (C) 2006 kogiidena
   8  * Copyright (C) 2010 Nobuhiro Iwamatsu
   9  */
  10 #include <linux/kernel.h>
  11 #include <linux/types.h>
  12 #include <linux/init.h>
  13 #include <linux/delay.h>
  14 #include <linux/pci.h>
  15 #include <linux/sh_intc.h>
  16 #include "pci-sh4.h"
  17
  18 #define PCIMCR_MRSET_OFF        0xBFFFFFFF
  19 #define PCIMCR_RFSH_OFF         0xFFFFFFFB
  20
  21 int pcibios_map_platform_irq(const struct pci_dev *pdev, u8 slot, u8 pin)
  22 {
  23         /*
  24          * slot0: pin1-4 = irq5,6,7,8
  25          * slot1: pin1-4 = irq6,7,8,5
  26          * slot2: pin1-4 = irq7,8,5,6
  27          * slot3: pin1-4 = irq8,5,6,7
  28          */
  29         int irq = ((slot + pin - 1) & 0x3) + evt2irq(0x2a0);
  30
  31         if ((slot | (pin - 1)) > 0x3) {
  32                 printk(KERN_WARNING "PCI: Bad IRQ mapping request for slot %d pin %c\n",
  33                        slot, pin - 1 + 'A');
  34                 return -1;
  35         }
  36         return irq;
  37 }
  38
  39 int pci_fixup_pcic(struct pci_channel *chan)
  40 {
  41         unsigned long bcr1, mcr;
  42
  43         bcr1 = __raw_readl(SH7751_BCR1);
  44         bcr1 |= 0x40080000;     /* Enable Bit 19 BREQEN, set PCIC to slave */
  45         pci_write_reg(chan, bcr1, SH4_PCIBCR1);
  46
  47         mcr = __raw_readl(SH7751_MCR);
  48         mcr = (mcr & PCIMCR_MRSET_OFF) & PCIMCR_RFSH_OFF;
  49         pci_write_reg(chan, mcr, SH4_PCIMCR);
  50
  51         pci_write_reg(chan, 0x0c000000, SH7751_PCICONF5);
  52         pci_write_reg(chan, 0xd0000000, SH7751_PCICONF6);
  53         pci_write_reg(chan, 0x0c000000, SH4_PCILAR0);
  54         pci_write_reg(chan, 0x00000000, SH4_PCILAR1);
  55
  56         return 0;
  57 }