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1 | /* |
2 | * Interface to the TURBOchannel related routines. |
3 | * |
4 | * Copyright (c) 1998 Harald Koerfgen |
5 | * Copyright (c) 2005 James Simmons |
6 | * Copyright (c) 2006 Maciej W. Rozycki |
7 | * |
8 | * Based on: |
9 | * |
10 | * "TURBOchannel Firmware Specification", EK-TCAAD-FS-004 |
11 | * |
12 | * from Digital Equipment Corporation. |
13 | * |
14 | * This file is subject to the terms and conditions of the GNU |
15 | * General Public License. See the file "COPYING" in the main |
16 | * directory of this archive for more details. |
17 | */ |
18 | #ifndef _LINUX_TC_H |
19 | #define _LINUX_TC_H |
20 | |
21 | #include <linux/compiler.h> |
22 | #include <linux/device.h> |
23 | #include <linux/ioport.h> |
24 | #include <linux/types.h> |
25 | |
26 | /* |
27 | * Offsets for the ROM header locations for TURBOchannel cards. |
28 | */ |
29 | #define TC_OLDCARD 0x3c0000 |
30 | #define TC_NEWCARD 0x000000 |
31 | |
32 | #define TC_ROM_WIDTH 0x3e0 |
33 | #define TC_ROM_STRIDE 0x3e4 |
34 | #define TC_ROM_SIZE 0x3e8 |
35 | #define TC_SLOT_SIZE 0x3ec |
36 | #define TC_PATTERN0 0x3f0 |
37 | #define TC_PATTERN1 0x3f4 |
38 | #define TC_PATTERN2 0x3f8 |
39 | #define TC_PATTERN3 0x3fc |
40 | #define TC_FIRM_VER 0x400 |
41 | #define TC_VENDOR 0x420 |
42 | #define TC_MODULE 0x440 |
43 | #define TC_FIRM_TYPE 0x460 |
44 | #define TC_FLAGS 0x470 |
45 | #define TC_ROM_OBJECTS 0x480 |
46 | |
47 | /* |
48 | * Information obtained through the get_tcinfo() PROM call. |
49 | */ |
50 | struct tcinfo { |
51 | s32 revision; /* Hardware revision level. */ |
52 | s32 clk_period; /* Clock period in nanoseconds. */ |
53 | s32 slot_size; /* Slot size in megabytes. */ |
54 | s32 io_timeout; /* I/O timeout in cycles. */ |
55 | s32 dma_range; /* DMA address range in megabytes. */ |
56 | s32 max_dma_burst; /* Maximum DMA burst length. */ |
57 | s32 parity; /* System module supports TC parity. */ |
58 | s32 reserved[4]; |
59 | }; |
60 | |
61 | /* |
62 | * TURBOchannel bus. |
63 | */ |
64 | struct tc_bus { |
65 | struct list_head devices; /* List of devices on this bus. */ |
66 | struct resource resource[2]; /* Address space routed to this bus. */ |
67 | |
68 | struct device dev; |
69 | char name[13]; |
70 | resource_size_t slot_base; |
71 | resource_size_t ext_slot_base; |
72 | resource_size_t ext_slot_size; |
73 | int num_tcslots; |
74 | struct tcinfo info; |
75 | }; |
76 | |
77 | /* |
78 | * TURBOchannel device. |
79 | */ |
80 | struct tc_dev { |
81 | struct list_head node; /* Node in list of all TC devices. */ |
82 | struct tc_bus *bus; /* Bus this device is on. */ |
83 | struct tc_driver *driver; /* Which driver has allocated this |
84 | device. */ |
85 | struct device dev; /* Generic device interface. */ |
86 | struct resource resource; /* Address space of this device. */ |
87 | char vendor[9]; |
88 | char name[9]; |
89 | char firmware[9]; |
90 | int interrupt; |
91 | int slot; |
92 | }; |
93 | |
94 | #define to_tc_dev(n) container_of(n, struct tc_dev, dev) |
95 | |
96 | struct tc_device_id { |
97 | char vendor[9]; |
98 | char name[9]; |
99 | }; |
100 | |
101 | /* |
102 | * TURBOchannel driver. |
103 | */ |
104 | struct tc_driver { |
105 | struct list_head node; |
106 | const struct tc_device_id *id_table; |
107 | struct device_driver driver; |
108 | }; |
109 | |
110 | #define to_tc_driver(drv) container_of(drv, struct tc_driver, driver) |
111 | |
112 | /* |
113 | * Return TURBOchannel clock frequency in Hz. |
114 | */ |
115 | static inline unsigned long tc_get_speed(struct tc_bus *tbus) |
116 | { |
117 | return 100000 * (10000 / (unsigned long)tbus->info.clk_period); |
118 | } |
119 | |
120 | #ifdef CONFIG_TC |
121 | |
122 | extern struct bus_type tc_bus_type; |
123 | |
124 | extern int tc_register_driver(struct tc_driver *tdrv); |
125 | extern void tc_unregister_driver(struct tc_driver *tdrv); |
126 | |
127 | #else /* !CONFIG_TC */ |
128 | |
129 | static inline int tc_register_driver(struct tc_driver *tdrv) { return 0; } |
130 | static inline void tc_unregister_driver(struct tc_driver *tdrv) { } |
131 | |
132 | #endif /* CONFIG_TC */ |
133 | |
134 | /* |
135 | * These have to be provided by the architecture. |
136 | */ |
137 | extern int tc_preadb(u8 *valp, void __iomem *addr); |
138 | extern int tc_bus_get_info(struct tc_bus *tbus); |
139 | extern void tc_device_get_irq(struct tc_dev *tdev); |
140 | |
141 | #endif /* _LINUX_TC_H */ |
142 |
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