LXR linux/include/linux/dio.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* header file for DIO boards for the HP300 architecture.
   3 * Maybe this should handle DIO-II later?
   4 * The general structure of this is vaguely based on how
   5 * the Amiga port handles Zorro boards.
   6 * Copyright (C) Peter Maydell 05/1998 <pmaydell@chiark.greenend.org.uk>
   7 * Converted to driver model Jochen Friedrich <jochen@scram.de>
   8 *
   9 * The board IDs are from the NetBSD kernel, which for once provided
  10 * helpful comments...
  11 *
  12 * This goes with drivers/dio/dio.c
  13 */
  14
  15#ifndef _LINUX_DIO_H
  16#define _LINUX_DIO_H
  17
  18/* The DIO boards in a system are distinguished by 'select codes' which 
  19 * range from 0-63 (DIO) and 132-255 (DIO-II). 
  20 * The DIO board with select code sc is located at physical address 
  21 *     0x600000 + sc * 0x10000
  22 * So DIO cards cover [0x600000-0x800000); the areas [0x200000-0x400000) and
  23 * [0x800000-0x1000000) are for additional space required by things
  24 * like framebuffers. [0x400000-0x600000) is for miscellaneous internal I/O.
  25 * On Linux, this is currently all mapped into the virtual address space
  26 * at 0xf0000000 on bootup.
  27 * DIO-II boards are at 0x1000000 + (sc - 132) * 0x400000
  28 * which is address range [0x1000000-0x20000000) -- too big to map completely,
  29 * so currently we just don't handle DIO-II boards.  It wouldn't be hard to 
  30 * do with ioremap() though.
  31 */
  32
  33#include <linux/device.h>
  34
  35#ifdef __KERNEL__
  36
  37#include <asm/hp300hw.h>
  38
  39typedef __u16 dio_id;
  40
  41    /*
  42     *  DIO devices
  43     */
  44
  45struct dio_dev {
  46        struct dio_bus *bus;
  47        dio_id id;
  48        int scode;
  49        struct dio_driver *driver;      /* which driver has allocated this device */
  50        struct device dev;              /* Generic device interface */
  51        u8 ipl;
  52        char name[64];
  53        struct resource resource;
  54};
  55
  56#define to_dio_dev(n) container_of(n, struct dio_dev, dev)
  57
  58    /*
  59     *  DIO bus
  60     */
  61
  62struct dio_bus {
  63        struct list_head devices;           /* list of devices on this bus */
  64        unsigned int num_resources;         /* number of resources */
  65        struct resource resources[2];       /* address space routed to this bus */
  66        struct device dev;
  67        char name[10];
  68};
  69
  70extern struct dio_bus dio_bus;      /* Single DIO bus */
  71extern struct bus_type dio_bus_type;
  72
  73    /*
  74     *  DIO device IDs
  75     */
  76
  77struct dio_device_id {
  78        dio_id id;                    /* Device ID or DIO_WILDCARD */
  79        unsigned long driver_data;    /* Data private to the driver */
  80};
  81
  82    /*
  83     *  DIO device drivers
  84     */
  85
  86struct dio_driver {
  87        struct list_head node;
  88        char *name;
  89        const struct dio_device_id *id_table;     /* NULL if wants all devices */
  90        int (*probe)(struct dio_dev *z, const struct dio_device_id *id);
  91/* New device inserted */
  92        void (*remove)(struct dio_dev *z);        /* Device removed (NULL if not a hot-plug capable driver) */
  93        struct device_driver driver;
  94};
  95
  96#define to_dio_driver(drv)    container_of(drv, struct dio_driver, driver)
  97
  98/* DIO/DIO-II boards all have the following 8bit registers.
  99 * These are offsets from the base of the device.
 100 */
 101#define DIO_IDOFF     0x01             /* primary device ID */
 102#define DIO_IPLOFF    0x03             /* interrupt priority level */
 103#define DIO_SECIDOFF  0x15             /* secondary device ID */
 104#define DIOII_SIZEOFF 0x101            /* device size, DIO-II only */
 105#define DIO_VIRADDRBASE 0xf0000000UL   /* vir addr where IOspace is mapped */
 106
 107#define DIO_BASE                0x600000        /* start of DIO space */
 108#define DIO_END                 0x1000000       /* end of DIO space */
 109#define DIO_DEVSIZE             0x10000         /* size of a DIO device */
 110
 111#define DIOII_BASE              0x01000000      /* start of DIO-II space */
 112#define DIOII_END               0x20000000      /* end of DIO-II space */
 113#define DIOII_DEVSIZE           0x00400000      /* size of a DIO-II device */
 114
 115/* Highest valid select code. If we add DIO-II support this should become
 116 * 256 for everything except HP320, which only has DIO.
 117 */
 118#define DIO_SCMAX (hp300_model == HP_320 ? 32 : 256)
 119#define DIOII_SCBASE 132 /* lowest DIO-II select code */
 120#define DIO_SCINHOLE(scode) (((scode) >= 32) && ((scode) < DIOII_SCBASE))
 121#define DIO_ISDIOII(scode) ((scode) >= 132 && (scode) < 256)
 122
 123/* macros to read device IDs, given base address */
 124#define DIO_ID(baseaddr) in_8((baseaddr) + DIO_IDOFF)
 125#define DIO_SECID(baseaddr) in_8((baseaddr) + DIO_SECIDOFF)
 126
 127/* extract the interrupt level */
 128#define DIO_IPL(baseaddr) (((in_8((baseaddr) + DIO_IPLOFF) >> 4) & 0x03) + 3)
 129
 130/* find the size of a DIO-II board's address space.
 131 * DIO boards are all fixed length.
 132 */
 133#define DIOII_SIZE(baseaddr) ((in_8((baseaddr) + DIOII_SIZEOFF) + 1) * 0x100000)
 134
 135/* general purpose macro for both DIO and DIO-II */
 136#define DIO_SIZE(scode, base) (DIO_ISDIOII((scode)) ? DIOII_SIZE((base)) : DIO_DEVSIZE)
 137
 138/* The hardware has primary and secondary IDs; we encode these in a single
 139 * int as PRIMARY ID & (SECONDARY ID << 8).
 140 * In practice this is only important for framebuffers,
 141 * and everybody else just sets ID fields equal to the DIO_ID_FOO value.
 142 */
 143#define DIO_ENCODE_ID(pr,sec) ((((int)sec & 0xff) << 8) | ((int)pr & 0xff))
 144/* macro to determine whether a given primary ID requires a secondary ID byte */
 145#define DIO_NEEDSSECID(id) ((id) == DIO_ID_FBUFFER)
 146#define DIO_WILDCARD 0xff
 147
 148/* Now a whole slew of macros giving device IDs and descriptive strings: */
 149#define DIO_ID_DCA0     0x02 /* 98644A serial */
 150#define DIO_DESC_DCA0 "98644A DCA0 serial"
 151#define DIO_ID_DCA0REM  0x82 /* 98644A serial */
 152#define DIO_DESC_DCA0REM "98644A DCA0REM serial"
 153#define DIO_ID_DCA1     0x42 /* 98644A serial */
 154#define DIO_DESC_DCA1 "98644A DCA1 serial"
 155#define DIO_ID_DCA1REM  0xc2 /* 98644A serial */
 156#define DIO_DESC_DCA1REM "98644A DCA1REM serial"
 157#define DIO_ID_DCM      0x05 /* 98642A serial MUX */
 158#define DIO_DESC_DCM "98642A DCM serial MUX"
 159#define DIO_ID_DCMREM   0x85 /* 98642A serial MUX */
 160#define DIO_DESC_DCMREM "98642A DCMREM serial MUX"
 161#define DIO_ID_LAN      0x15 /* 98643A LAN */
 162#define DIO_DESC_LAN "98643A LANCE ethernet"
 163#define DIO_ID_FHPIB    0x08 /* 98625A/98625B fast HP-IB */
 164#define DIO_DESC_FHPIB "98625A/98625B fast HPIB"
 165#define DIO_ID_NHPIB    0x01 /* 98624A HP-IB (normal ie slow) */
 166#define DIO_DESC_NHPIB "98624A HPIB"
 167#define DIO_ID_SCSI0    0x07 /* 98265A SCSI */
 168#define DIO_DESC_SCSI0 "98265A SCSI0"
 169#define DIO_ID_SCSI1    0x27 /* ditto */
 170#define DIO_DESC_SCSI1 "98265A SCSI1"
 171#define DIO_ID_SCSI2    0x47 /* ditto */
 172#define DIO_DESC_SCSI2 "98265A SCSI2"
 173#define DIO_ID_SCSI3    0x67 /* ditto */
 174#define DIO_DESC_SCSI3 "98265A SCSI3"
 175#define DIO_ID_FBUFFER  0x39 /* framebuffer: flavour is distinguished by secondary ID */
 176#define DIO_DESC_FBUFFER "bitmapped display"
 177/* the NetBSD kernel source is a bit unsure as to what these next IDs actually do :-> */
 178#define DIO_ID_MISC0    0x03 /* 98622A */
 179#define DIO_DESC_MISC0 "98622A"
 180#define DIO_ID_MISC1    0x04 /* 98623A */
 181#define DIO_DESC_MISC1 "98623A"
 182#define DIO_ID_PARALLEL 0x06 /* internal parallel */
 183#define DIO_DESC_PARALLEL "internal parallel"
 184#define DIO_ID_MISC2    0x09 /* 98287A keyboard */
 185#define DIO_DESC_MISC2 "98287A keyboard"
 186#define DIO_ID_MISC3    0x0a /* HP98635A FP accelerator */
 187#define DIO_DESC_MISC3 "HP98635A FP accelerator"
 188#define DIO_ID_MISC4    0x0b /* timer */
 189#define DIO_DESC_MISC4 "timer"
 190#define DIO_ID_MISC5    0x12 /* 98640A */
 191#define DIO_DESC_MISC5 "98640A"
 192#define DIO_ID_MISC6    0x16 /* 98659A */
 193#define DIO_DESC_MISC6 "98659A"
 194#define DIO_ID_MISC7    0x19 /* 237 display */
 195#define DIO_DESC_MISC7 "237 display"
 196#define DIO_ID_MISC8    0x1a /* quad-wide card */
 197#define DIO_DESC_MISC8 "quad-wide card"
 198#define DIO_ID_MISC9    0x1b /* 98253A */
 199#define DIO_DESC_MISC9 "98253A"
 200#define DIO_ID_MISC10   0x1c /* 98627A */
 201#define DIO_DESC_MISC10 "98253A"
 202#define DIO_ID_MISC11   0x1d /* 98633A */
 203#define DIO_DESC_MISC11 "98633A"
 204#define DIO_ID_MISC12   0x1e /* 98259A */
 205#define DIO_DESC_MISC12 "98259A"
 206#define DIO_ID_MISC13   0x1f /* 8741 */
 207#define DIO_DESC_MISC13 "8741"
 208#define DIO_ID_VME      0x31 /* 98577A VME adapter */
 209#define DIO_DESC_VME "98577A VME adapter"
 210#define DIO_ID_DCL      0x34 /* 98628A serial */
 211#define DIO_DESC_DCL "98628A DCL serial"
 212#define DIO_ID_DCLREM   0xb4 /* 98628A serial */
 213#define DIO_DESC_DCLREM "98628A DCLREM serial"
 214/* These are the secondary IDs for the framebuffers */
 215#define DIO_ID2_GATORBOX    0x01 /* 98700/98710 "gatorbox" */
 216#define DIO_DESC2_GATORBOX       "98700/98710 \"gatorbox\" display"
 217#define DIO_ID2_TOPCAT      0x02 /* 98544/98545/98547 "topcat" */
 218#define DIO_DESC2_TOPCAT         "98544/98545/98547 \"topcat\" display"
 219#define DIO_ID2_RENAISSANCE 0x04 /* 98720/98721 "renaissance" */
 220#define DIO_DESC2_RENAISSANCE    "98720/98721 \"renaissance\" display"
 221#define DIO_ID2_LRCATSEYE   0x05 /* lowres "catseye" */
 222#define DIO_DESC2_LRCATSEYE      "low-res catseye display"
 223#define DIO_ID2_HRCCATSEYE  0x06 /* highres colour "catseye" */
 224#define DIO_DESC2_HRCCATSEYE     "high-res color catseye display"
 225#define DIO_ID2_HRMCATSEYE  0x07 /* highres mono "catseye" */
 226#define DIO_DESC2_HRMCATSEYE     "high-res mono catseye display"
 227#define DIO_ID2_DAVINCI     0x08 /* 98730/98731 "davinci" */
 228#define DIO_DESC2_DAVINCI        "98730/98731 \"davinci\" display"
 229#define DIO_ID2_XXXCATSEYE  0x09 /* "catseye" */
 230#define DIO_DESC2_XXXCATSEYE     "catseye display"
 231#define DIO_ID2_HYPERION    0x0e /* A1096A "hyperion" */
 232#define DIO_DESC2_HYPERION       "A1096A \"hyperion\" display"
 233#define DIO_ID2_XGENESIS    0x0b /* "x-genesis"; no NetBSD support */
 234#define DIO_DESC2_XGENESIS       "\"x-genesis\" display"
 235#define DIO_ID2_TIGER       0x0c /* "tiger"; no NetBSD support */
 236#define DIO_DESC2_TIGER          "\"tiger\" display"
 237#define DIO_ID2_YGENESIS    0x0d /* "y-genesis"; no NetBSD support */
 238#define DIO_DESC2_YGENESIS       "\"y-genesis\" display"
 239/* if you add new IDs then you should tell dio.c about them so it can
 240 * identify them...
 241 */
 242
 243extern int dio_find(int deviceid);
 244extern unsigned long dio_scodetophysaddr(int scode);
 245extern int dio_create_sysfs_dev_files(struct dio_dev *);
 246
 247/* New-style probing */
 248extern int dio_register_driver(struct dio_driver *);
 249extern void dio_unregister_driver(struct dio_driver *);
 250extern const struct dio_device_id *dio_match_device(const struct dio_device_id *ids, const struct dio_dev *z);
 251static inline struct dio_driver *dio_dev_driver(const struct dio_dev *d)
 252{
 253    return d->driver;
 254}
 255
 256#define dio_resource_start(d) ((d)->resource.start)
 257#define dio_resource_end(d)   ((d)->resource.end)
 258#define dio_resource_len(d)   (resource_size(&(d)->resource))
 259#define dio_resource_flags(d) ((d)->resource.flags)
 260
 261#define dio_request_device(d, name) \
 262    request_mem_region(dio_resource_start(d), dio_resource_len(d), name)
 263#define dio_release_device(d) \
 264    release_mem_region(dio_resource_start(d), dio_resource_len(d))
 265
 266/* Similar to the helpers above, these manipulate per-dio_dev
 267 * driver-specific data.  They are really just a wrapper around
 268 * the generic device structure functions of these calls.
 269 */
 270static inline void *dio_get_drvdata (struct dio_dev *d)
 271{
 272        return dev_get_drvdata(&d->dev);
 273}
 274
 275static inline void dio_set_drvdata (struct dio_dev *d, void *data)
 276{
 277        dev_set_drvdata(&d->dev, data);
 278}
 279
 280#endif /* __KERNEL__ */
 281#endif /* ndef _LINUX_DIO_H */
 282