xref: /openbmc/linux/include/linux/eisa.h (revision b2441318)
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 
35 struct 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 
eisa_get_region_index(void * addr)50 static 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 
58 struct 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 
68 extern struct bus_type eisa_bus_type;
69 int eisa_driver_register (struct eisa_driver *edrv);
70 void eisa_driver_unregister (struct eisa_driver *edrv);
71 
72 #else /* !CONFIG_EISA */
73 
eisa_driver_register(struct eisa_driver * edrv)74 static inline int eisa_driver_register (struct eisa_driver *edrv) { return 0; }
eisa_driver_unregister(struct eisa_driver * edrv)75 static inline void eisa_driver_unregister (struct eisa_driver *edrv) { }
76 
77 #endif /* !CONFIG_EISA */
78 
79 /* Mimics pci.h... */
eisa_get_drvdata(struct eisa_device * edev)80 static inline void *eisa_get_drvdata (struct eisa_device *edev)
81 {
82         return dev_get_drvdata(&edev->dev);
83 }
84 
eisa_set_drvdata(struct eisa_device * edev,void * data)85 static 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 
93 struct 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 
104 int eisa_root_register (struct eisa_root_device *root);
105 
106 #ifdef CONFIG_EISA
107 extern int EISA_bus;
108 #else
109 # define EISA_bus 0
110 #endif
111 
112 #endif
113