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/* There is not much we can say about an EISA device, apart from
32 * signature, slot number, and base address. dma_mask is set by
33 * default to parent device mask..*/
34
35struct eisa_device {
36 struct eisa_device_id id;
37 int slot;
38 int state;
39 unsigned long base_addr;
40 struct resource res[EISA_MAX_RESOURCES];
41 u64 dma_mask;
42 struct device dev; /* generic device */
43#ifdef CONFIG_EISA_NAMES
44 char pretty_name[50];
45#endif
46};
47
48#define to_eisa_device(n) container_of(n, struct eisa_device, dev)
49
50static inline int eisa_get_region_index (void *addr)
51{
52 unsigned long x = (unsigned long) addr;
53
54 x &= 0xc00;
55 return (x >> 12);
56}
57
58struct eisa_driver {
59 const struct eisa_device_id *id_table;
60 struct device_driver driver;
61};
62
63#define to_eisa_driver(drv) container_of(drv,struct eisa_driver, driver)
64
65/* These external functions are only available when EISA support is enabled. */
66#ifdef CONFIG_EISA
67
68extern struct bus_type eisa_bus_type;
69int eisa_driver_register (struct eisa_driver *edrv);
70void eisa_driver_unregister (struct eisa_driver *edrv);
71
72#else /* !CONFIG_EISA */
73
74static inline int eisa_driver_register (struct eisa_driver *edrv) { return 0; }
75static inline void eisa_driver_unregister (struct eisa_driver *edrv) { }
76
77#endif /* !CONFIG_EISA */
78
79/* Mimics pci.h... */
80static inline void *eisa_get_drvdata (struct eisa_device *edev)
81{
82 return dev_get_drvdata(&edev->dev);
83}
84
85static inline void eisa_set_drvdata (struct eisa_device *edev, void *data)
86{
87 dev_set_drvdata(&edev->dev, data);
88}
89
90/* The EISA root device. There's rumours about machines with multiple
91 * busses (PA-RISC ?), so we try to handle that. */
92
93struct eisa_root_device {
94 struct device *dev; /* Pointer to bridge device */
95 struct resource *res;
96 unsigned long bus_base_addr;
97 int slots; /* Max slot number */
98 int force_probe; /* Probe even when no slot 0 */
99 u64 dma_mask; /* from bridge device */
100 int bus_nr; /* Set by eisa_root_register */
101 struct resource eisa_root_res; /* ditto */
102};
103
104int eisa_root_register (struct eisa_root_device *root);
105
106#ifdef CONFIG_EISA
107extern int EISA_bus;
108#else
109# define EISA_bus 0
110#endif
111
112#endif
113