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wdenkf4863a72004-02-07 01:27:10 +00001/*
2 * VR4131 PCIU support code for TANBAC Evaluation board TB0229.
3 *
4 * (C) Masami Komiya <mkomiya@sonare.it> 2004
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2, or (at
9 * your option) any later version.
10 */
11
12#include <common.h>
13#include <pci.h>
14#include <asm/addrspace.h>
15
16#define VR4131_PCIMMAW1REG (volatile unsigned int*)(KSEG1 + 0x0f000c00)
17#define VR4131_PCIMMAW2REG (volatile unsigned int*)(KSEG1 + 0x0f000c04)
18#define VR4131_PCITAW1REG (volatile unsigned int*)(KSEG1 + 0x0f000c08)
19#define VR4131_PCITAW2REG (volatile unsigned int*)(KSEG1 + 0x0f000c0c)
20#define VR4131_PCIMIOAWREG (volatile unsigned int*)(KSEG1 + 0x0f000c10)
21#define VR4131_PCICONFDREG (volatile unsigned int*)(KSEG1 + 0x0f000c14)
22#define VR4131_PCICONFAREG (volatile unsigned int*)(KSEG1 + 0x0f000c18)
23#define VR4131_PCIMAILREG (volatile unsigned int*)(KSEG1 + 0x0f000c1c)
24#define VR4131_BUSERRADREG (volatile unsigned int*)(KSEG1 + 0x0f000c24)
25#define VR4131_INTCNTSTAREG (volatile unsigned int*)(KSEG1 + 0x0f000c28)
26#define VR4131_PCIEXACCREG (volatile unsigned int*)(KSEG1 + 0x0f000c2c)
27#define VR4131_PCIRECONTREG (volatile unsigned int*)(KSEG1 + 0x0f000c30)
28#define VR4131_PCIENREG (volatile unsigned int*)(KSEG1 + 0x0f000c34)
29#define VR4131_PCICLKSELREG (volatile unsigned int*)(KSEG1 + 0x0f000c38)
30#define VR4131_PCITRDYREG (volatile unsigned int*)(KSEG1 + 0x0f000c3c)
31#define VR4131_PCICLKRUNREG (volatile unsigned int*)(KSEG1 + 0x0f000c60)
32#define VR4131_PCIHOSTCONFIG (volatile unsigned int*)(KSEG1 + 0x0f000d00)
33#define VR4131_VENDORIDREG (volatile unsigned int*)(KSEG1 + 0x0f000d00)
34#define VR4131_DEVICEIDREG (volatile unsigned int*)(KSEG1 + 0x0f000d00)
35#define VR4131_COMMANDREG (volatile unsigned int*)(KSEG1 + 0x0f000d04)
36#define VR4131_STATUSREG (volatile unsigned int*)(KSEG1 + 0x0f000d04)
37#define VR4131_REVREG (volatile unsigned int*)(KSEG1 + 0x0f000d08)
38#define VR4131_CLASSREG (volatile unsigned int*)(KSEG1 + 0x0f000d08)
39#define VR4131_CACHELSREG (volatile unsigned int*)(KSEG1 + 0x0f000d0c)
40#define VR4131_LATTIMERRG (volatile unsigned int*)(KSEG1 + 0x0f000d0c)
41#define VR4131_MAILBAREG (volatile unsigned int*)(KSEG1 + 0x0f000d10)
42#define VR4131_PCIMBA1REG (volatile unsigned int*)(KSEG1 + 0x0f000d14)
43#define VR4131_PCIMBA2REG (volatile unsigned int*)(KSEG1 + 0x0f000d18)
44
45/*#define VR41XX_PCIIRQ_OFFSET (VR41XX_IRQ_MAX + 1) */
46/*#define VR41XX_PCIIRQ_MAX (VR41XX_IRQ_MAX + 12) */
47/*#define VR4122_PCI_HOST_BASE 0xa0000000 */
48
49volatile unsigned int *pciconfigaddr;
50volatile unsigned int *pciconfigdata;
51
52#define PCI_ACCESS_READ 0
53#define PCI_ACCESS_WRITE 1
54
55/*
56 * Access PCI Configuration Register for VR4131
57 */
58
59static int vr4131_pci_config_access (u8 access_type, u32 dev, u32 reg,
60 u32 * data)
61{
62 u32 bus;
63 u32 device;
64
65 bus = ((dev & 0xff0000) >> 16);
66 device = ((dev & 0xf800) >> 11);
67
68 if (bus == 0) {
69 /* Type 0 Configuration */
70 *VR4131_PCICONFAREG = (u32) (1UL << device | (reg & 0xfc));
71 } else {
72 /* Type 1 Configuration */
73 *VR4131_PCICONFAREG = (u32) (dev | ((reg / 4) << 2) | 1);
74 }
75
76 if (access_type == PCI_ACCESS_WRITE) {
77 *VR4131_PCICONFDREG = *data;
78 } else {
79 *data = *VR4131_PCICONFDREG;
80 }
81
82 return (0);
83}
84
85static int vr4131_pci_read_config_byte (u32 hose, u32 dev, u32 reg, u8 * val)
86{
87 u32 data;
88
89 if (vr4131_pci_config_access (PCI_ACCESS_READ, dev, reg, &data))
90 return -1;
91
92 *val = (data >> ((reg & 3) << 3)) & 0xff;
93
94 return 0;
95}
96
97
98static int vr4131_pci_read_config_word (u32 hose, u32 dev, u32 reg, u16 * val)
99{
100 u32 data;
101
102 if (reg & 1)
103 return -1;
104
105 if (vr4131_pci_config_access (PCI_ACCESS_READ, dev, reg, &data))
106 return -1;
107
108 *val = (data >> ((reg & 3) << 3)) & 0xffff;
109
110 return 0;
111}
112
113
114static int vr4131_pci_read_config_dword (u32 hose, u32 dev, u32 reg,
115 u32 * val)
116{
117 u32 data = 0;
118
119 if (reg & 3)
120 return -1;
121
122 if (vr4131_pci_config_access (PCI_ACCESS_READ, dev, reg, &data))
123 return -1;
124
125 *val = data;
126
127 return (0);
128}
129
130static int vr4131_pci_write_config_byte (u32 hose, u32 dev, u32 reg, u8 val)
131{
132 u32 data = 0;
133
134 if (vr4131_pci_config_access (PCI_ACCESS_READ, dev, reg, &data))
135 return -1;
136
137 data = (data & ~(0xff << ((reg & 3) << 3))) | (val <<
138 ((reg & 3) << 3));
139
140 if (vr4131_pci_config_access (PCI_ACCESS_WRITE, dev, reg, &data))
141 return -1;
142
143 return 0;
144}
145
146
147static int vr4131_pci_write_config_word (u32 hose, u32 dev, u32 reg, u16 val)
148{
149 u32 data = 0;
150
151 if (reg & 1)
152 return -1;
153
154 if (vr4131_pci_config_access (PCI_ACCESS_READ, dev, reg, &data))
155 return -1;
156
157 data = (data & ~(0xffff << ((reg & 3) << 3))) | (val <<
158 ((reg & 3) << 3));
159
160 if (vr4131_pci_config_access (PCI_ACCESS_WRITE, dev, reg, &data))
161 return -1;
162
163 return 0;
164}
165
166static int vr4131_pci_write_config_dword (u32 hose, u32 dev, u32 reg, u32 val)
167{
168 u32 data;
169
170 if (reg & 3) {
171 return -1;
172 }
173
174 data = val;
175
176 if (vr4131_pci_config_access (PCI_ACCESS_WRITE, dev, reg, &data))
177 return -1;
178
179 return (0);
180}
181
182
183/*
184 * Initialize VR4131 PCIU
185 */
186
187vr4131_pciu_init ()
188{
189 /* PCI clock */
190 *VR4131_PCICLKSELREG = 0x00000002;
191
192 /* PCI memory and I/O space */
193 *VR4131_PCIMMAW1REG = 0x100F9010;
194 *VR4131_PCIMMAW2REG = 0x140FD014;
195 *VR4131_PCIMIOAWREG = 0x160FD000;
196
197 /* Target memory window */
198 *VR4131_PCITAW1REG = 0x00081000; /* 64MB */
199 *VR4131_PCITAW2REG = 0x00000000;
200
201 *VR4131_MAILBAREG = 0UL;
202 *VR4131_PCIMBA1REG = 0UL;
203
204 *VR4131_PCITRDYREG = 0x00008004;
205
206 *VR4131_PCIENREG = 0x00000004; /* PCI enable */
207 *VR4131_COMMANDREG = 0x02000007;
208}
209
210/*
211 * Initialize Module
212 */
213
214void init_vr4131_pci (struct pci_controller *hose)
215{
216 hose->first_busno = 0;
217 hose->last_busno = 0xff;
218
219 vr4131_pciu_init (); /* Initialize VR4131 PCIU */
220
221 /* PCI memory space #1 */
222 pci_set_region (hose->regions + 0,
223 0x10000000, 0xb0000000, 0x04000000, PCI_REGION_MEM);
224
225 /* PCI memory space #2 */
226 pci_set_region (hose->regions + 1,
227 0x14000000, 0xb4000000, 0x02000000, PCI_REGION_MEM);
228
229
230 /* PCI I/O space */
231 pci_set_region (hose->regions + 2,
232 0x16000000, 0xb6000000, 0x02000000, PCI_REGION_IO);
233
234 /* System memory space */
235 pci_set_region (hose->regions + 3,
236 0x00000000,
237 0x80000000,
238 0x04000000, PCI_REGION_MEM | PCI_REGION_MEMORY);
239
240 hose->region_count = 4;
241
242 hose->read_byte = vr4131_pci_read_config_byte;
243 hose->read_word = vr4131_pci_read_config_word;
244 hose->read_dword = vr4131_pci_read_config_dword;
245 hose->write_byte = vr4131_pci_write_config_byte;
246 hose->write_word = vr4131_pci_write_config_word;
247 hose->write_dword = vr4131_pci_write_config_dword;
248
249 pci_register_hose (hose);
250
251 hose->last_busno = pci_hose_scan (hose);
252
253 return;
254}