1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_EISA_H
3 #define _LINUX_EISA_H
4
5 #include <linux/ioport.h>
6 #include <linux/device.h>
7 #include <linux/mod_devicetable.h>
8
9 #define EISA_MAX_SLOTS 8
10
11 #define EISA_MAX_RESOURCES 4
12
13 /* A few EISA constants/offsets... */
14
15 #define EISA_DMA1_STATUS 8
16 #define EISA_INT1_CTRL 0x20
17 #define EISA_INT1_MASK 0x21
18 #define EISA_INT2_CTRL 0xA0
19 #define EISA_INT2_MASK 0xA1
20 #define EISA_DMA2_STATUS 0xD0
21 #define EISA_DMA2_WRITE_SINGLE 0xD4
22 #define EISA_EXT_NMI_RESET_CTRL 0x461
23 #define EISA_INT1_EDGE_LEVEL 0x4D0
24 #define EISA_INT2_EDGE_LEVEL 0x4D1
25 #define EISA_VENDOR_ID_OFFSET 0xC80
26 #define EISA_CONFIG_OFFSET 0xC84
27
28 #define EISA_CONFIG_ENABLED 1
29 #define EISA_CONFIG_FORCED 2
30
31 /* Chosen to hold the longest string in eisa.ids. */
32 #define EISA_DEVICE_INFO_NAME_SIZE 74
33
34 /* There is not much we can say about an EISA device, apart from
35 * signature, slot number, and base address. dma_mask is set by
36 * default to parent device mask..*/
37
38 struct eisa_device {
39 struct eisa_device_id id;
40 int slot;
41 int state;
42 unsigned long base_addr;
43 struct resource res[EISA_MAX_RESOURCES];
44 u64 dma_mask;
45 struct device dev; /* generic device */
46 #ifdef CONFIG_EISA_NAMES
47 char pretty_name[EISA_DEVICE_INFO_NAME_SIZE];
48 #endif
49 };
50
51 #define to_eisa_device(n) container_of(n, struct eisa_device, dev)
52
eisa_get_region_index(void * addr)53 static inline int eisa_get_region_index (void *addr)
54 {
55 unsigned long x = (unsigned long) addr;
56
57 x &= 0xc00;
58 return (x >> 12);
59 }
60
61 struct eisa_driver {
62 const struct eisa_device_id *id_table;
63 struct device_driver driver;
64 };
65
66 #define to_eisa_driver(drv) container_of_const(drv,struct eisa_driver, driver)
67
68 /* These external functions are only available when EISA support is enabled. */
69 #ifdef CONFIG_EISA
70
71 extern struct bus_type eisa_bus_type;
72 int eisa_driver_register (struct eisa_driver *edrv);
73 void eisa_driver_unregister (struct eisa_driver *edrv);
74
75 #else /* !CONFIG_EISA */
76
eisa_driver_register(struct eisa_driver * edrv)77 static inline int eisa_driver_register (struct eisa_driver *edrv) { return 0; }
eisa_driver_unregister(struct eisa_driver * edrv)78 static inline void eisa_driver_unregister (struct eisa_driver *edrv) { }
79
80 #endif /* !CONFIG_EISA */
81
82 /* Mimics pci.h... */
eisa_get_drvdata(struct eisa_device * edev)83 static inline void *eisa_get_drvdata (struct eisa_device *edev)
84 {
85 return dev_get_drvdata(&edev->dev);
86 }
87
eisa_set_drvdata(struct eisa_device * edev,void * data)88 static inline void eisa_set_drvdata (struct eisa_device *edev, void *data)
89 {
90 dev_set_drvdata(&edev->dev, data);
91 }
92
93 /* The EISA root device. There's rumours about machines with multiple
94 * busses (PA-RISC ?), so we try to handle that. */
95
96 struct eisa_root_device {
97 struct device *dev; /* Pointer to bridge device */
98 struct resource *res;
99 unsigned long bus_base_addr;
100 int slots; /* Max slot number */
101 int force_probe; /* Probe even when no slot 0 */
102 u64 dma_mask; /* from bridge device */
103 int bus_nr; /* Set by eisa_root_register */
104 struct resource eisa_root_res; /* ditto */
105 };
106
107 int eisa_root_register (struct eisa_root_device *root);
108
109 #ifdef CONFIG_EISA
110 extern int EISA_bus;
111 #else
112 # define EISA_bus 0
113 #endif
114
115 #endif
116