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[u-boot] / 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 */