include/linux/eisa.h

   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
  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
  74 static inline int eisa_driver_register (struct eisa_driver *edrv) { return 0; }
  75 static inline void eisa_driver_unregister (struct eisa_driver *edrv) { }
  76
  77 #endif /* !CONFIG_EISA */
  78
  79 /* Mimics pci.h... */
  80 static inline void *eisa_get_drvdata (struct eisa_device *edev)
  81 {
  82         return dev_get_drvdata(&edev->dev);
  83 }
  84
  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