arch/sh/drivers/pci/fixups-rts7751r2d.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * arch/sh/drivers/pci/fixups-rts7751r2d.c
   4  *
   5  * RTS7751R2D / LBOXRE2 PCI fixups
   6  *
   7  * Copyright (C) 2003  Lineo uSolutions, Inc.
   8  * Copyright (C) 2004  Paul Mundt
   9  * Copyright (C) 2007  Nobuhiro Iwamatsu
  10  */
  11 #include <linux/pci.h>
  12 #include <mach/lboxre2.h>
  13 #include <mach/r2d.h>
  14 #include "pci-sh4.h"
  15 #include <generated/machtypes.h>
  16
  17 #define PCIMCR_MRSET_OFF        0xBFFFFFFF
  18 #define PCIMCR_RFSH_OFF         0xFFFFFFFB
  19
  20 static u8 rts7751r2d_irq_tab[] = {
  21         IRQ_PCI_INTA,
  22         IRQ_PCI_INTB,
  23         IRQ_PCI_INTC,
  24         IRQ_PCI_INTD,
  25 };
  26
  27 static char lboxre2_irq_tab[] = {
  28         IRQ_ETH0, IRQ_ETH1, IRQ_INTA, IRQ_INTD,
  29 };
  30
  31 int pcibios_map_platform_irq(const struct pci_dev *pdev, u8 slot, u8 pin)
  32 {
  33         if (mach_is_lboxre2())
  34                 return lboxre2_irq_tab[slot];
  35         else
  36                 return rts7751r2d_irq_tab[slot];
  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         /* Enable all interrupts, so we known what to fix */
  48         pci_write_reg(chan, 0x0000c3ff, SH4_PCIINTM);
  49         pci_write_reg(chan, 0x0000380f, SH4_PCIAINTM);
  50
  51         pci_write_reg(chan, 0xfb900047, SH7751_PCICONF1);
  52         pci_write_reg(chan, 0xab000001, SH7751_PCICONF4);
  53
  54         mcr = __raw_readl(SH7751_MCR);
  55         mcr = (mcr & PCIMCR_MRSET_OFF) & PCIMCR_RFSH_OFF;
  56         pci_write_reg(chan, mcr, SH4_PCIMCR);
  57
  58         pci_write_reg(chan, 0x0c000000, SH7751_PCICONF5);
  59         pci_write_reg(chan, 0xd0000000, SH7751_PCICONF6);
  60         pci_write_reg(chan, 0x0c000000, SH4_PCILAR0);
  61         pci_write_reg(chan, 0x00000000, SH4_PCILAR1);
  62
  63         return 0;
  64 }