1 /*
2 * arch/mips/vr41xx/common/pciu.h
3 *
4 * Include file for PCI Control Unit of the NEC VR4100 series.
5 *
6 * Author: Yoichi Yuasa <yyuasa@mvista.com, or source@mvista.com>
7 *
8 * 2002-2003 (c) MontaVista, Software, Inc. This file is licensed under
9 * the terms of the GNU General Public License version 2. This program
10 * is licensed "as is" without any warranty of any kind, whether express
11 * or implied.
12 */
13 /*
14 * Changes:
15 * MontaVista Software Inc. <yyuasa@mvista.com> or <source@mvista.com>
16 * - New creation, NEC VR4122 and VR4131 are supported.
17 */
18 #ifndef __VR41XX_PCIU_H
19 #define __VR41XX_PCIU_H
20
21 #include <linux/config.h>
22 #include <asm/addrspace.h>
23
24 #define BIT(x) (1U << (x))
25
26 #define PCIMMAW1REG KSEG1ADDR(0x0f000c00)
27 #define PCIMMAW2REG KSEG1ADDR(0x0f000c04)
28 #define PCITAW1REG KSEG1ADDR(0x0f000c08)
29 #define PCITAW2REG KSEG1ADDR(0x0f000c0c)
30 #define PCIMIOAWREG KSEG1ADDR(0x0f000c10)
31 #define INTERNAL_BUS_BASE_ADDRESS 0xff000000U
32 #define ADDRESS_MASK 0x000fe000U
33 #define PCI_ACCESS_ENABLE BIT(12)
34 #define PCI_ADDRESS_SETTING 0x000000ffU
35
36 #define PCICONFDREG KSEG1ADDR(0x0f000c14)
37 #define PCICONFAREG KSEG1ADDR(0x0f000c18)
38 #define PCIMAILREG KSEG1ADDR(0x0f000c1c)
39
40 #define BUSERRADREG KSEG1ADDR(0x0f000c24)
41 #define ERROR_ADDRESS 0xfffffffcU
42
43 #define INTCNTSTAREG KSEG1ADDR(0x0f000c28)
44 #define MABTCLR BIT(31)
45 #define TRDYCLR BIT(30)
46 #define PARCLR BIT(29)
47 #define MBCLR BIT(28)
48 #define SERRCLR BIT(27)
49
50 #define PCIEXACCREG KSEG1ADDR(0x0f000c2c)
51 #define UNLOCK BIT(1)
52 #define EAREQ BIT(0)
53
54 #define PCIRECONTREG KSEG1ADDR(0x0f000c30)
55 #define RTRYCNT 0xffU
56
57 #define PCIENREG KSEG1ADDR(0x0f000c34)
58 #define CONFIG_DONE BIT(2)
59
60 #define PCICLKSELREG KSEG1ADDR(0x0f000c38)
61 #define EQUAL_VTCLOCK 0x2U
62 #define HALF_VTCLOCK 0x0U
63 #define QUARTER_VTCLOCK 0x1U
64
65 #define PCITRDYVREG KSEG1ADDR(0x0f000c3c)
66
67 #define PCICLKRUNREG KSEG1ADDR(0x0f000c60)
68
69 #define VENDORIDREG KSEG1ADDR(0x0f000d00)
70
71 #define MPCIINTREG KSEG1ADDR(0x0f0000b2)
72
73 #define MAX_PCI_CLOCK 33333333
74
pciu_read_config_byte(int where,uint8_t * val)75 static inline int pciu_read_config_byte(int where, uint8_t *val)
76 {
77 uint32_t data;
78
79 if (where > 0xff)
80 return PCIBIOS_BAD_REGISTER_NUMBER;
81
82 data = readl(VENDORIDREG + (where & 0xfc));
83 *val = (uint8_t)(data >> ((where & 3) << 3));
84
85 return PCIBIOS_SUCCESSFUL;
86 }
87
pciu_read_config_word(int where,uint16_t * val)88 static inline int pciu_read_config_word(int where, uint16_t *val)
89 {
90 uint32_t data;
91
92 if (where > 0xff || (where & 1))
93 return PCIBIOS_BAD_REGISTER_NUMBER;
94
95 data = readl(VENDORIDREG + (where & 0xfc));
96 *val = (uint16_t)(data >> ((where & 2) << 3));
97
98 return PCIBIOS_SUCCESSFUL;
99 }
100
pciu_read_config_dword(int where,uint32_t * val)101 static inline int pciu_read_config_dword(int where, uint32_t *val)
102 {
103 if (where > 0xff || (where & 3))
104 return PCIBIOS_BAD_REGISTER_NUMBER;
105
106 *val = readl(VENDORIDREG + where);
107
108 return PCIBIOS_SUCCESSFUL;
109 }
110
pciu_write_config_byte(int where,uint8_t val)111 static inline int pciu_write_config_byte(int where, uint8_t val)
112 {
113 uint32_t data;
114 int shift;
115
116 if (where > 0xff)
117 return PCIBIOS_BAD_REGISTER_NUMBER;
118
119 data = readl(VENDORIDREG + (where & 0xfc));
120 shift = (where & 3) << 3;
121 data &= ~(0xffU << shift);
122 data |= (uint32_t)val << shift;
123 writel(data, VENDORIDREG + (where & 0xfc));
124
125 return 0;
126 }
127
pciu_write_config_word(int where,uint16_t val)128 static inline int pciu_write_config_word(int where, uint16_t val)
129 {
130 uint32_t data;
131 int shift;
132
133 if (where > 0xff || (where & 1))
134 return PCIBIOS_BAD_REGISTER_NUMBER;
135
136 data = readl(VENDORIDREG + (where & 0xfc));
137 shift = (where & 2) << 3;
138 data &= ~(0xffffU << shift);
139 data |= (uint32_t)val << shift;
140 writel(data, VENDORIDREG + (where & 0xfc));
141
142 return 0;
143 }
144
pciu_write_config_dword(int where,uint32_t val)145 static inline int pciu_write_config_dword(int where, uint32_t val)
146 {
147 if (where > 0xff || (where & 3))
148 return PCIBIOS_BAD_REGISTER_NUMBER;
149
150 writel(val, VENDORIDREG + where);
151
152 return 0;
153 }
154
155 #endif /* __VR41XX_PCIU_H */
156