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
  13 #include <asm/processor.h>
  14 #include <asm/io.h>
  15 #include <asm/pci.h>
  16 #include <pci.h>
  17
  18 int pci_sh4_init(struct pci_controller *hose)
  19 {
  20         hose->first_busno = 0;
  21         hose->region_count = 0;
  22         hose->last_busno = 0xff;
  23
  24         /* PCI memory space */
  25         pci_set_region(hose->regions + 0,
  26                 CONFIG_PCI_MEM_BUS,
  27                 CONFIG_PCI_MEM_PHYS,
  28                 CONFIG_PCI_MEM_SIZE,
  29                 PCI_REGION_MEM);
  30         hose->region_count++;
  31
  32         /* PCI IO space */
  33         pci_set_region(hose->regions + 1,
  34                 CONFIG_PCI_IO_BUS,
  35                 CONFIG_PCI_IO_PHYS,
  36                 CONFIG_PCI_IO_SIZE,
  37                 PCI_REGION_IO);
  38         hose->region_count++;
  39
  40 #if defined(CONFIG_PCI_SYS_BUS)
  41         /* PCI System Memory space */
  42         pci_set_region(hose->regions + 2,
  43                 CONFIG_PCI_SYS_BUS,
  44                 CONFIG_PCI_SYS_PHYS,
  45                 CONFIG_PCI_SYS_SIZE,
  46                 PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
  47         hose->region_count++;
  48 #endif
  49
  50         udelay(1000);
  51
  52         pci_set_ops(hose,
  53                     pci_hose_read_config_byte_via_dword,
  54                     pci_hose_read_config_word_via_dword,
  55                     pci_sh4_read_config_dword,
  56                     pci_hose_write_config_byte_via_dword,
  57                     pci_hose_write_config_word_via_dword,
  58                     pci_sh4_write_config_dword);
  59
  60         pci_register_hose(hose);
  61
  62         udelay(1000);
  63
  64 #ifdef CONFIG_PCI_SCAN_SHOW
  65         printf("PCI:   Bus Dev VenId DevId Class Int\n");
  66 #endif
  67         hose->last_busno = pci_hose_scan(hose);
  68         return 0;
  69 }
  70
  71 int pci_skip_dev(struct pci_controller *hose, pci_dev_t dev)
  72 {
  73         return 0;
  74 }
  75
  76 #ifdef CONFIG_PCI_SCAN_SHOW
  77 int pci_print_dev(struct pci_controller *hose, pci_dev_t dev)
  78 {
  79         return 1;
  80 }
  81 #endif /* CONFIG_PCI_SCAN_SHOW */