drivers/pci/pci_sh4.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * SH4 PCI Controller (PCIC) for U-Boot.
   4  * (C) Dustin McIntire (dustin@sensoria.com)
   5  * (C) 2007,2008 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
   6  * (C) 2008 Yusuke Goda <goda.yusuke@renesas.com>
   7  *
   8  * u-boot/arch/sh/cpu/sh4/pci-sh4.c
   9  */
  10
  11 #include <common.h>
  12 #include <linux/delay.h>
  13
  14 #include <asm/processor.h>
  15 #include <asm/io.h>
  16 #include <asm/pci.h>
  17 #include <pci.h>
  18
  19 int pci_sh4_init(struct pci_controller *hose)
  20 {
  21         hose->first_busno = 0;
  22         hose->region_count = 0;
  23         hose->last_busno = 0xff;
  24
  25         /* PCI memory space */
  26         pci_set_region(hose->regions + 0,
  27                 CONFIG_PCI_MEM_BUS,
  28                 CONFIG_PCI_MEM_PHYS,
  29                 CONFIG_PCI_MEM_SIZE,
  30                 PCI_REGION_MEM);
  31         hose->region_count++;
  32
  33         /* PCI IO space */
  34         pci_set_region(hose->regions + 1,
  35                 CONFIG_PCI_IO_BUS,
  36                 CONFIG_PCI_IO_PHYS,
  37                 CONFIG_PCI_IO_SIZE,
  38                 PCI_REGION_IO);
  39         hose->region_count++;
  40
  41 #if defined(CONFIG_PCI_SYS_BUS)
  42         /* PCI System Memory space */
  43         pci_set_region(hose->regions + 2,
  44                 CONFIG_PCI_SYS_BUS,
  45                 CONFIG_PCI_SYS_PHYS,
  46                 CONFIG_PCI_SYS_SIZE,
  47                 PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
  48         hose->region_count++;
  49 #endif
  50
  51         udelay(1000);
  52
  53         pci_set_ops(hose,
  54                     pci_hose_read_config_byte_via_dword,
  55                     pci_hose_read_config_word_via_dword,
  56                     pci_sh4_read_config_dword,
  57                     pci_hose_write_config_byte_via_dword,
  58                     pci_hose_write_config_word_via_dword,
  59                     pci_sh4_write_config_dword);
  60
  61         pci_register_hose(hose);
  62
  63         udelay(1000);
  64
  65 #ifdef CONFIG_PCI_SCAN_SHOW
  66         printf("PCI:   Bus Dev VenId DevId Class Int\n");
  67 #endif
  68         hose->last_busno = pci_hose_scan(hose);
  69         return 0;
  70 }
  71
  72 int pci_skip_dev(struct pci_controller *hose, pci_dev_t dev)
  73 {
  74         return 0;
  75 }
  76
  77 #ifdef CONFIG_PCI_SCAN_SHOW
  78 int pci_print_dev(struct pci_controller *hose, pci_dev_t dev)
  79 {
  80         return 1;
  81 }
  82 #endif /* CONFIG_PCI_SCAN_SHOW */