2 * SH7751 PCI Controller (PCIC) for U-Boot.
3 * (C) Dustin McIntire (dustin@sensoria.com)
4 * (C) 2007,2008 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
6 * SPDX-License-Identifier: GPL-2.0+
11 #include <asm/processor.h>
15 /* Register addresses and such */
16 #define SH7751_BCR1 (vu_long *)0xFF800000
17 #define SH7751_BCR2 (vu_short *)0xFF800004
18 #define SH7751_WCR1 (vu_long *)0xFF800008
19 #define SH7751_WCR2 (vu_long *)0xFF80000C
20 #define SH7751_WCR3 (vu_long *)0xFF800010
21 #define SH7751_MCR (vu_long *)0xFF800014
22 #define SH7751_BCR3 (vu_short *)0xFF800050
23 #define SH7751_PCICONF0 (vu_long *)0xFE200000
24 #define SH7751_PCICONF1 (vu_long *)0xFE200004
25 #define SH7751_PCICONF2 (vu_long *)0xFE200008
26 #define SH7751_PCICONF3 (vu_long *)0xFE20000C
27 #define SH7751_PCICONF4 (vu_long *)0xFE200010
28 #define SH7751_PCICONF5 (vu_long *)0xFE200014
29 #define SH7751_PCICONF6 (vu_long *)0xFE200018
30 #define SH7751_PCICR (vu_long *)0xFE200100
31 #define SH7751_PCILSR0 (vu_long *)0xFE200104
32 #define SH7751_PCILSR1 (vu_long *)0xFE200108
33 #define SH7751_PCILAR0 (vu_long *)0xFE20010C
34 #define SH7751_PCILAR1 (vu_long *)0xFE200110
35 #define SH7751_PCIMBR (vu_long *)0xFE2001C4
36 #define SH7751_PCIIOBR (vu_long *)0xFE2001C8
37 #define SH7751_PCIPINT (vu_long *)0xFE2001CC
38 #define SH7751_PCIPINTM (vu_long *)0xFE2001D0
39 #define SH7751_PCICLKR (vu_long *)0xFE2001D4
40 #define SH7751_PCIBCR1 (vu_long *)0xFE2001E0
41 #define SH7751_PCIBCR2 (vu_long *)0xFE2001E4
42 #define SH7751_PCIWCR1 (vu_long *)0xFE2001E8
43 #define SH7751_PCIWCR2 (vu_long *)0xFE2001EC
44 #define SH7751_PCIWCR3 (vu_long *)0xFE2001F0
45 #define SH7751_PCIMCR (vu_long *)0xFE2001F4
46 #define SH7751_PCIBCR3 (vu_long *)0xFE2001F8
48 #define BCR1_BREQEN 0x00080000
49 #define PCI_SH7751_ID 0x35051054
50 #define PCI_SH7751R_ID 0x350E1054
51 #define SH7751_PCICONF1_WCC 0x00000080
52 #define SH7751_PCICONF1_PER 0x00000040
53 #define SH7751_PCICONF1_BUM 0x00000004
54 #define SH7751_PCICONF1_MES 0x00000002
55 #define SH7751_PCICONF1_CMDS 0x000000C6
56 #define SH7751_PCI_HOST_BRIDGE 0x6
57 #define SH7751_PCICR_PREFIX 0xa5000000
58 #define SH7751_PCICR_PRST 0x00000002
59 #define SH7751_PCICR_CFIN 0x00000001
60 #define SH7751_PCIPINT_D3 0x00000002
61 #define SH7751_PCIPINT_D0 0x00000001
62 #define SH7751_PCICLKR_PREFIX 0xa5000000
64 #define SH7751_PCI_MEM_BASE 0xFD000000
65 #define SH7751_PCI_MEM_SIZE 0x01000000
66 #define SH7751_PCI_IO_BASE 0xFE240000
67 #define SH7751_PCI_IO_SIZE 0x00040000
69 #define SH7751_CS3_BASE_ADDR 0x0C000000
70 #define SH7751_P2CS3_BASE_ADDR 0xAC000000
72 #define SH7751_PCIPAR (vu_long *)0xFE2001C0
73 #define SH7751_PCIPDR (vu_long *)0xFE200220
75 #define p4_in(addr) (*addr)
76 #define p4_out(data, addr) (*addr) = (data)
79 int pci_sh4_read_config_dword(struct pci_controller *hose,
80 pci_dev_t dev, int offset, u32 *value)
82 u32 par_data = 0x80000000 | dev;
84 p4_out(par_data | (offset & 0xfc), SH7751_PCIPAR);
85 *value = p4_in(SH7751_PCIPDR);
90 int pci_sh4_write_config_dword(struct pci_controller *hose,
91 pci_dev_t dev, int offset, u32 value)
93 u32 par_data = 0x80000000 | dev;
95 p4_out(par_data | (offset & 0xfc), SH7751_PCIPAR);
96 p4_out(value, SH7751_PCIPDR);
101 int pci_sh7751_init(struct pci_controller *hose)
103 /* Double-check that we're a 7751 or 7751R chip */
104 if (p4_in(SH7751_PCICONF0) != PCI_SH7751_ID
105 && p4_in(SH7751_PCICONF0) != PCI_SH7751R_ID) {
106 printf("PCI: Unknown PCI host bridge.\n");
109 printf("PCI: SH7751 PCI host bridge found.\n");
111 /* Double-check some BSC config settings */
112 /* (Area 3 non-MPX 32-bit, PCI bus pins) */
113 if ((p4_in(SH7751_BCR1) & 0x20008) == 0x20000) {
114 printf("SH7751_BCR1 value is wrong(0x%08X)\n",
115 (unsigned int)p4_in(SH7751_BCR1));
118 if ((p4_in(SH7751_BCR2) & 0xC0) != 0xC0) {
119 printf("SH7751_BCR2 value is wrong(0x%08X)\n",
120 (unsigned int)p4_in(SH7751_BCR2));
123 if (p4_in(SH7751_BCR2) & 0x01) {
124 printf("SH7751_BCR2 value is wrong(0x%08X)\n",
125 (unsigned int)p4_in(SH7751_BCR2));
129 /* Force BREQEN in BCR1 to allow PCIC access */
130 p4_out((p4_in(SH7751_BCR1) | BCR1_BREQEN), SH7751_BCR1);
132 /* Toggle PCI reset pin */
133 p4_out((SH7751_PCICR_PREFIX | SH7751_PCICR_PRST), SH7751_PCICR);
135 p4_out(SH7751_PCICR_PREFIX, SH7751_PCICR);
137 /* Set cmd bits: WCC, PER, BUM, MES */
138 /* (Addr/Data stepping, Parity enabled, Bus Master, Memory enabled) */
139 p4_out(0xfb900047, SH7751_PCICONF1); /* K.Kino */
141 /* Define this host as the host bridge */
142 p4_out((SH7751_PCI_HOST_BRIDGE << 24), SH7751_PCICONF2);
144 /* Force PCI clock(s) on */
145 p4_out(0, SH7751_PCICLKR);
146 p4_out(0x03, SH7751_PCICLKR);
148 /* Clear powerdown IRQs, also mask them (unused) */
149 p4_out((SH7751_PCIPINT_D0 | SH7751_PCIPINT_D3), SH7751_PCIPINT);
150 p4_out(0, SH7751_PCIPINTM);
152 p4_out(0xab000001, SH7751_PCICONF4);
154 /* Set up target memory mappings (for external DMA access) */
155 /* Map both P0 and P2 range to Area 3 RAM for ease of use */
156 p4_out((64 - 1) << 20, SH7751_PCILSR0);
157 p4_out(SH7751_CS3_BASE_ADDR, SH7751_PCILAR0);
158 p4_out(0, SH7751_PCILSR1);
159 p4_out(0, SH7751_PCILAR1);
160 p4_out(SH7751_CS3_BASE_ADDR, SH7751_PCICONF5);
161 p4_out(0xd0000000, SH7751_PCICONF6);
163 /* Map memory window to same address on PCI bus */
164 p4_out(SH7751_PCI_MEM_BASE, SH7751_PCIMBR);
166 /* Map IO window to same address on PCI bus */
167 p4_out(0x2000 & 0xfffc0000, SH7751_PCIIOBR);
170 p4_out(inl(SH7751_BCR1) | 0x00080000, SH7751_BCR1);
172 /* Copy BSC registers into PCI BSC */
173 p4_out(inl(SH7751_BCR1), SH7751_PCIBCR1);
174 p4_out(inw(SH7751_BCR2), SH7751_PCIBCR2);
175 p4_out(inw(SH7751_BCR3), SH7751_PCIBCR3);
176 p4_out(inl(SH7751_WCR1), SH7751_PCIWCR1);
177 p4_out(inl(SH7751_WCR2), SH7751_PCIWCR2);
178 p4_out(inl(SH7751_WCR3), SH7751_PCIWCR3);
179 p4_out(inl(SH7751_MCR), SH7751_PCIMCR);
181 /* Finally, set central function init complete */
182 p4_out((SH7751_PCICR_PREFIX | SH7751_PCICR_CFIN), SH7751_PCICR);