Powerpc/i2c: Use the same initialize codes
[oweals/u-boot.git] / drivers / pci / pci_indirect.c
1 /*
2  * Support for indirect PCI bridges.
3  *
4  * Copyright (C) 1998 Gabriel Paubert.
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
8  * as published by the Free Software Foundation; either version
9  * 2 of the License, or (at your option) any later version.
10  */
11
12 #include <common.h>
13
14 #if !defined(__I386__)
15
16 #include <asm/processor.h>
17 #include <asm/io.h>
18 #include <pci.h>
19
20 #define cfg_read(val, addr, type, op)   *val = op((type)(addr))
21 #define cfg_write(val, addr, type, op)  op((type *)(addr), (val))
22
23 #if defined(CONFIG_MPC8260)
24 #define INDIRECT_PCI_OP(rw, size, type, op, mask)                        \
25 static int                                                               \
26 indirect_##rw##_config_##size(struct pci_controller *hose,               \
27                               pci_dev_t dev, int offset, type val)       \
28 {                                                                        \
29         u32 b, d,f;                                                      \
30         b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev);           \
31         b = b - hose->first_busno;                                       \
32         dev = PCI_BDF(b, d, f);                                          \
33         out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000);    \
34         sync();                                                          \
35         cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);       \
36         return 0;                                                        \
37 }
38 #elif defined(CONFIG_E500) || defined(CONFIG_MPC86xx)
39 #define INDIRECT_PCI_OP(rw, size, type, op, mask)                        \
40 static int                                                               \
41 indirect_##rw##_config_##size(struct pci_controller *hose,               \
42                               pci_dev_t dev, int offset, type val)       \
43 {                                                                        \
44         u32 b, d,f;                                                      \
45         b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev);           \
46         b = b - hose->first_busno;                                       \
47         dev = PCI_BDF(b, d, f);                                          \
48         *(hose->cfg_addr) = dev | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000; \
49         sync();                                                          \
50         cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);       \
51         return 0;                                                        \
52 }
53 #elif defined(CONFIG_440GX)  || defined(CONFIG_440GP) || defined(CONFIG_440SP) || \
54       defined(CONFIG_440SPE) || defined(CONFIG_460EX) || defined(CONFIG_460GT)
55 #define INDIRECT_PCI_OP(rw, size, type, op, mask)                        \
56 static int                                                               \
57 indirect_##rw##_config_##size(struct pci_controller *hose,               \
58                               pci_dev_t dev, int offset, type val)       \
59 {                                                                        \
60         u32 b, d,f;                                                      \
61         b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev);           \
62         b = b - hose->first_busno;                                       \
63         dev = PCI_BDF(b, d, f);                                          \
64         if (PCI_BUS(dev) > 0)                                            \
65                 out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000001); \
66         else                                                             \
67                 out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \
68         cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);       \
69         return 0;                                                        \
70 }
71 #else
72 #define INDIRECT_PCI_OP(rw, size, type, op, mask)                        \
73 static int                                                               \
74 indirect_##rw##_config_##size(struct pci_controller *hose,               \
75                               pci_dev_t dev, int offset, type val)       \
76 {                                                                        \
77         u32 b, d,f;                                                      \
78         b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev);           \
79         b = b - hose->first_busno;                                       \
80         dev = PCI_BDF(b, d, f);                                          \
81         out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000);    \
82         cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);       \
83         return 0;                                                        \
84 }
85 #endif
86
87 #define INDIRECT_PCI_OP_ERRATA6(rw, size, type, op, mask)                \
88 static int                                                               \
89 indirect_##rw##_config_##size(struct pci_controller *hose,               \
90                               pci_dev_t dev, int offset, type val)       \
91 {                                                                        \
92         unsigned int msr = mfmsr();                                      \
93         mtmsr(msr & ~(MSR_EE | MSR_CE));                                 \
94         out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000);    \
95         cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);       \
96         out_le32(hose->cfg_addr, 0x00000000);                            \
97         mtmsr(msr);                                                      \
98         return 0;                                                        \
99 }
100
101 INDIRECT_PCI_OP(read, byte, u8 *, in_8, 3)
102 INDIRECT_PCI_OP(read, word, u16 *, in_le16, 2)
103 INDIRECT_PCI_OP(read, dword, u32 *, in_le32, 0)
104 #ifdef CONFIG_405GP
105 INDIRECT_PCI_OP_ERRATA6(write, byte, u8, out_8, 3)
106 INDIRECT_PCI_OP_ERRATA6(write, word, u16, out_le16, 2)
107 INDIRECT_PCI_OP_ERRATA6(write, dword, u32, out_le32, 0)
108 #else
109 INDIRECT_PCI_OP(write, byte, u8, out_8, 3)
110 INDIRECT_PCI_OP(write, word, u16, out_le16, 2)
111 INDIRECT_PCI_OP(write, dword, u32, out_le32, 0)
112 #endif
113
114 void pci_setup_indirect(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
115 {
116         pci_set_ops(hose,
117                     indirect_read_config_byte,
118                     indirect_read_config_word,
119                     indirect_read_config_dword,
120                     indirect_write_config_byte,
121                     indirect_write_config_word,
122                     indirect_write_config_dword);
123
124         hose->cfg_addr = (unsigned int *) cfg_addr;
125         hose->cfg_data = (unsigned char *) cfg_data;
126 }
127
128 #endif  /* !__I386__ */