LXR linux/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
  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