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 * See file CREDITS for list of people who contributed to this
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 #include <asm/processor.h>
31 /* Register addresses and such */
32 #define SH7751_BCR1 (vu_long *)0xFF800000
33 #define SH7751_BCR2 (vu_short *)0xFF800004
34 #define SH7751_WCR1 (vu_long *)0xFF800008
35 #define SH7751_WCR2 (vu_long *)0xFF80000C
36 #define SH7751_WCR3 (vu_long *)0xFF800010
37 #define SH7751_MCR (vu_long *)0xFF800014
38 #define SH7751_BCR3 (vu_short *)0xFF800050
39 #define SH7751_PCICONF0 (vu_long *)0xFE200000
40 #define SH7751_PCICONF1 (vu_long *)0xFE200004
41 #define SH7751_PCICONF2 (vu_long *)0xFE200008
42 #define SH7751_PCICONF3 (vu_long *)0xFE20000C
43 #define SH7751_PCICONF4 (vu_long *)0xFE200010
44 #define SH7751_PCICONF5 (vu_long *)0xFE200014
45 #define SH7751_PCICONF6 (vu_long *)0xFE200018
46 #define SH7751_PCICR (vu_long *)0xFE200100
47 #define SH7751_PCILSR0 (vu_long *)0xFE200104
48 #define SH7751_PCILSR1 (vu_long *)0xFE200108
49 #define SH7751_PCILAR0 (vu_long *)0xFE20010C
50 #define SH7751_PCILAR1 (vu_long *)0xFE200110
51 #define SH7751_PCIMBR (vu_long *)0xFE2001C4
52 #define SH7751_PCIIOBR (vu_long *)0xFE2001C8
53 #define SH7751_PCIPINT (vu_long *)0xFE2001CC
54 #define SH7751_PCIPINTM (vu_long *)0xFE2001D0
55 #define SH7751_PCICLKR (vu_long *)0xFE2001D4
56 #define SH7751_PCIBCR1 (vu_long *)0xFE2001E0
57 #define SH7751_PCIBCR2 (vu_long *)0xFE2001E4
58 #define SH7751_PCIWCR1 (vu_long *)0xFE2001E8
59 #define SH7751_PCIWCR2 (vu_long *)0xFE2001EC
60 #define SH7751_PCIWCR3 (vu_long *)0xFE2001F0
61 #define SH7751_PCIMCR (vu_long *)0xFE2001F4
62 #define SH7751_PCIBCR3 (vu_long *)0xFE2001F8
64 #define BCR1_BREQEN 0x00080000
65 #define PCI_SH7751_ID 0x35051054
66 #define PCI_SH7751R_ID 0x350E1054
67 #define SH7751_PCICONF1_WCC 0x00000080
68 #define SH7751_PCICONF1_PER 0x00000040
69 #define SH7751_PCICONF1_BUM 0x00000004
70 #define SH7751_PCICONF1_MES 0x00000002
71 #define SH7751_PCICONF1_CMDS 0x000000C6
72 #define SH7751_PCI_HOST_BRIDGE 0x6
73 #define SH7751_PCICR_PREFIX 0xa5000000
74 #define SH7751_PCICR_PRST 0x00000002
75 #define SH7751_PCICR_CFIN 0x00000001
76 #define SH7751_PCIPINT_D3 0x00000002
77 #define SH7751_PCIPINT_D0 0x00000001
78 #define SH7751_PCICLKR_PREFIX 0xa5000000
80 #define SH7751_PCI_MEM_BASE 0xFD000000
81 #define SH7751_PCI_MEM_SIZE 0x01000000
82 #define SH7751_PCI_IO_BASE 0xFE240000
83 #define SH7751_PCI_IO_SIZE 0x00040000
85 #define SH7751_CS3_BASE_ADDR 0x0C000000
86 #define SH7751_P2CS3_BASE_ADDR 0xAC000000
88 #define SH7751_PCIPAR (vu_long *)0xFE2001C0
89 #define SH7751_PCIPDR (vu_long *)0xFE200220
91 #define p4_in(addr) (*addr)
92 #define p4_out(data, addr) (*addr) = (data)
95 int pci_sh4_read_config_dword(struct pci_controller *hose,
96 pci_dev_t dev, int offset, u32 *value)
98 u32 par_data = 0x80000000 | dev;
100 p4_out(par_data | (offset & 0xfc), SH7751_PCIPAR);
101 *value = p4_in(SH7751_PCIPDR);
106 int pci_sh4_write_config_dword(struct pci_controller *hose,
107 pci_dev_t dev, int offset, u32 value)
109 u32 par_data = 0x80000000 | dev;
111 p4_out(par_data | (offset & 0xfc), SH7751_PCIPAR);
112 p4_out(value, SH7751_PCIPDR);
117 int pci_sh7751_init(struct pci_controller *hose)
119 /* Double-check that we're a 7751 or 7751R chip */
120 if (p4_in(SH7751_PCICONF0) != PCI_SH7751_ID
121 && p4_in(SH7751_PCICONF0) != PCI_SH7751R_ID) {
122 printf("PCI: Unknown PCI host bridge.\n");
125 printf("PCI: SH7751 PCI host bridge found.\n");
127 /* Double-check some BSC config settings */
128 /* (Area 3 non-MPX 32-bit, PCI bus pins) */
129 if ((p4_in(SH7751_BCR1) & 0x20008) == 0x20000) {
130 printf("SH7751_BCR1 value is wrong(0x%08X)\n",
131 (unsigned int)p4_in(SH7751_BCR1));
134 if ((p4_in(SH7751_BCR2) & 0xC0) != 0xC0) {
135 printf("SH7751_BCR2 value is wrong(0x%08X)\n",
136 (unsigned int)p4_in(SH7751_BCR2));
139 if (p4_in(SH7751_BCR2) & 0x01) {
140 printf("SH7751_BCR2 value is wrong(0x%08X)\n",
141 (unsigned int)p4_in(SH7751_BCR2));
145 /* Force BREQEN in BCR1 to allow PCIC access */
146 p4_out((p4_in(SH7751_BCR1) | BCR1_BREQEN), SH7751_BCR1);
148 /* Toggle PCI reset pin */
149 p4_out((SH7751_PCICR_PREFIX | SH7751_PCICR_PRST), SH7751_PCICR);
151 p4_out(SH7751_PCICR_PREFIX, SH7751_PCICR);
153 /* Set cmd bits: WCC, PER, BUM, MES */
154 /* (Addr/Data stepping, Parity enabled, Bus Master, Memory enabled) */
155 p4_out(0xfb900047, SH7751_PCICONF1); /* K.Kino */
157 /* Define this host as the host bridge */
158 p4_out((SH7751_PCI_HOST_BRIDGE << 24), SH7751_PCICONF2);
160 /* Force PCI clock(s) on */
161 p4_out(0, SH7751_PCICLKR);
162 p4_out(0x03, SH7751_PCICLKR);
164 /* Clear powerdown IRQs, also mask them (unused) */
165 p4_out((SH7751_PCIPINT_D0 | SH7751_PCIPINT_D3), SH7751_PCIPINT);
166 p4_out(0, SH7751_PCIPINTM);
168 p4_out(0xab000001, SH7751_PCICONF4);
170 /* Set up target memory mappings (for external DMA access) */
171 /* Map both P0 and P2 range to Area 3 RAM for ease of use */
172 p4_out((64 - 1) << 20, SH7751_PCILSR0);
173 p4_out(SH7751_CS3_BASE_ADDR, SH7751_PCILAR0);
174 p4_out(0, SH7751_PCILSR1);
175 p4_out(0, SH7751_PCILAR1);
176 p4_out(SH7751_CS3_BASE_ADDR, SH7751_PCICONF5);
177 p4_out(0xd0000000, SH7751_PCICONF6);
179 /* Map memory window to same address on PCI bus */
180 p4_out(SH7751_PCI_MEM_BASE, SH7751_PCIMBR);
182 /* Map IO window to same address on PCI bus */
183 p4_out(0x2000 & 0xfffc0000, SH7751_PCIIOBR);
186 p4_out(inl(SH7751_BCR1) | 0x00080000, SH7751_BCR1);
188 /* Copy BSC registers into PCI BSC */
189 p4_out(inl(SH7751_BCR1), SH7751_PCIBCR1);
190 p4_out(inw(SH7751_BCR2), SH7751_PCIBCR2);
191 p4_out(inw(SH7751_BCR3), SH7751_PCIBCR3);
192 p4_out(inl(SH7751_WCR1), SH7751_PCIWCR1);
193 p4_out(inl(SH7751_WCR2), SH7751_PCIWCR2);
194 p4_out(inl(SH7751_WCR3), SH7751_PCIWCR3);
195 p4_out(inl(SH7751_MCR), SH7751_PCIMCR);
197 /* Finally, set central function init complete */
198 p4_out((SH7751_PCICR_PREFIX | SH7751_PCICR_CFIN), SH7751_PCICR);