include/linux/dio.h

   1 /* header file for DIO boards for the HP300 architecture.
   2  * Maybe this should handle DIO-II later?
   3  * The general structure of this is vaguely based on how
   4  * the Amiga port handles Zorro boards.
   5  * Copyright (C) Peter Maydell 05/1998 <pmaydell@chiark.greenend.org.uk>
   6  * Converted to driver model Jochen Friedrich <jochen@scram.de>
   7  *
   8  * The board IDs are from the NetBSD kernel, which for once provided
   9  * helpful comments...
  10  *
  11  * This goes with drivers/dio/dio.c
  12  */
  13
  14 #ifndef _LINUX_DIO_H
  15 #define _LINUX_DIO_H
  16
  17 /* The DIO boards in a system are distinguished by 'select codes' which
  18  * range from 0-63 (DIO) and 132-255 (DIO-II).
  19  * The DIO board with select code sc is located at physical address
  20  *     0x600000 + sc * 0x10000
  21  * So DIO cards cover [0x600000-0x800000); the areas [0x200000-0x400000) and
  22  * [0x800000-0x1000000) are for additional space required by things
  23  * like framebuffers. [0x400000-0x600000) is for miscellaneous internal I/O.
  24  * On Linux, this is currently all mapped into the virtual address space
  25  * at 0xf0000000 on bootup.
  26  * DIO-II boards are at 0x1000000 + (sc - 132) * 0x400000
  27  * which is address range [0x1000000-0x20000000) -- too big to map completely,
  28  * so currently we just don't handle DIO-II boards.  It wouldn't be hard to
  29  * do with ioremap() though.
  30  */
  31
  32 #include <linux/device.h>
  33
  34 #ifdef __KERNEL__
  35
  36 #include <asm/hp300hw.h>
  37
  38 typedef __u16 dio_id;
  39
  40     /*
  41      *  DIO devices
  42      */
  43
  44 struct dio_dev {
  45         struct dio_bus *bus;
  46         dio_id id;
  47         int scode;
  48         struct dio_driver *driver;      /* which driver has allocated this device */
  49         struct device dev;              /* Generic device interface */
  50         u8 ipl;
  51         char name[64];
  52         struct resource resource;
  53 };
  54
  55 #define to_dio_dev(n) container_of(n, struct dio_dev, dev)
  56
  57     /*
  58      *  DIO bus
  59      */
  60
  61 struct dio_bus {
  62         struct list_head devices;           /* list of devices on this bus */
  63         unsigned int num_resources;         /* number of resources */
  64         struct resource resources[2];       /* address space routed to this bus */
  65         struct device dev;
  66         char name[10];
  67 };
  68
  69 extern struct dio_bus dio_bus;      /* Single DIO bus */
  70 extern struct bus_type dio_bus_type;
  71
  72     /*
  73      *  DIO device IDs
  74      */
  75
  76 struct dio_device_id {
  77         dio_id id;                    /* Device ID or DIO_WILDCARD */
  78         unsigned long driver_data;    /* Data private to the driver */
  79 };
  80
  81     /*
  82      *  DIO device drivers
  83      */
  84
  85 struct dio_driver {
  86         struct list_head node;
  87         char *name;
  88         const struct dio_device_id *id_table;     /* NULL if wants all devices */
  89         int (*probe)(struct dio_dev *z, const struct dio_device_id *id);
  90 /* New device inserted */
  91         void (*remove)(struct dio_dev *z);        /* Device removed (NULL if not a hot-plug capable driver) */
  92         struct device_driver driver;
  93 };
  94
  95 #define to_dio_driver(drv)    container_of(drv, struct dio_driver, driver)
  96
  97 /* DIO/DIO-II boards all have the following 8bit registers.
  98  * These are offsets from the base of the device.
  99  */
 100 #define DIO_IDOFF     0x01             /* primary device ID */
 101 #define DIO_IPLOFF    0x03             /* interrupt priority level */
 102 #define DIO_SECIDOFF  0x15             /* secondary device ID */
 103 #define DIOII_SIZEOFF 0x101            /* device size, DIO-II only */
 104 #define DIO_VIRADDRBASE 0xf0000000UL   /* vir addr where IOspace is mapped */
 105
 106 #define DIO_BASE                0x600000        /* start of DIO space */
 107 #define DIO_END                 0x1000000       /* end of DIO space */
 108 #define DIO_DEVSIZE             0x10000         /* size of a DIO device */
 109
 110 #define DIOII_BASE              0x01000000      /* start of DIO-II space */
 111 #define DIOII_END               0x20000000      /* end of DIO-II space */
 112 #define DIOII_DEVSIZE           0x00400000      /* size of a DIO-II device */
 113
 114 /* Highest valid select code. If we add DIO-II support this should become
 115  * 256 for everything except HP320, which only has DIO.
 116  */
 117 #define DIO_SCMAX (hp300_model == HP_320 ? 32 : 256)
 118 #define DIOII_SCBASE 132 /* lowest DIO-II select code */
 119 #define DIO_SCINHOLE(scode) (((scode) >= 32) && ((scode) < DIOII_SCBASE))
 120 #define DIO_ISDIOII(scode) ((scode) >= 132 && (scode) < 256)
 121
 122 /* macros to read device IDs, given base address */
 123 #define DIO_ID(baseaddr) in_8((baseaddr) + DIO_IDOFF)
 124 #define DIO_SECID(baseaddr) in_8((baseaddr) + DIO_SECIDOFF)
 125
 126 /* extract the interrupt level */
 127 #define DIO_IPL(baseaddr) (((in_8((baseaddr) + DIO_IPLOFF) >> 4) & 0x03) + 3)
 128
 129 /* find the size of a DIO-II board's address space.
 130  * DIO boards are all fixed length.
 131  */
 132 #define DIOII_SIZE(baseaddr) ((in_8((baseaddr) + DIOII_SIZEOFF) + 1) * 0x100000)
 133
 134 /* general purpose macro for both DIO and DIO-II */
 135 #define DIO_SIZE(scode, base) (DIO_ISDIOII((scode)) ? DIOII_SIZE((base)) : DIO_DEVSIZE)
 136
 137 /* The hardware has primary and secondary IDs; we encode these in a single
 138  * int as PRIMARY ID & (SECONDARY ID << 8).
 139  * In practice this is only important for framebuffers,
 140  * and everybody else just sets ID fields equal to the DIO_ID_FOO value.
 141  */
 142 #define DIO_ENCODE_ID(pr,sec) ((((int)sec & 0xff) << 8) | ((int)pr & 0xff))
 143 /* macro to determine whether a given primary ID requires a secondary ID byte */
 144 #define DIO_NEEDSSECID(id) ((id) == DIO_ID_FBUFFER)
 145 #define DIO_WILDCARD 0xff
 146
 147 /* Now a whole slew of macros giving device IDs and descriptive strings: */
 148 #define DIO_ID_DCA0     0x02 /* 98644A serial */
 149 #define DIO_DESC_DCA0 "98644A DCA0 serial"
 150 #define DIO_ID_DCA0REM  0x82 /* 98644A serial */
 151 #define DIO_DESC_DCA0REM "98644A DCA0REM serial"
 152 #define DIO_ID_DCA1     0x42 /* 98644A serial */
 153 #define DIO_DESC_DCA1 "98644A DCA1 serial"
 154 #define DIO_ID_DCA1REM  0xc2 /* 98644A serial */
 155 #define DIO_DESC_DCA1REM "98644A DCA1REM serial"
 156 #define DIO_ID_DCM      0x05 /* 98642A serial MUX */
 157 #define DIO_DESC_DCM "98642A DCM serial MUX"
 158 #define DIO_ID_DCMREM   0x85 /* 98642A serial MUX */
 159 #define DIO_DESC_DCMREM "98642A DCMREM serial MUX"
 160 #define DIO_ID_LAN      0x15 /* 98643A LAN */
 161 #define DIO_DESC_LAN "98643A LANCE ethernet"
 162 #define DIO_ID_FHPIB    0x08 /* 98625A/98625B fast HP-IB */
 163 #define DIO_DESC_FHPIB "98625A/98625B fast HPIB"
 164 #define DIO_ID_NHPIB    0x01 /* 98624A HP-IB (normal ie slow) */
 165 #define DIO_DESC_NHPIB "98624A HPIB"
 166 #define DIO_ID_SCSI0    0x07 /* 98265A SCSI */
 167 #define DIO_DESC_SCSI0 "98265A SCSI0"
 168 #define DIO_ID_SCSI1    0x27 /* ditto */
 169 #define DIO_DESC_SCSI1 "98265A SCSI1"
 170 #define DIO_ID_SCSI2    0x47 /* ditto */
 171 #define DIO_DESC_SCSI2 "98265A SCSI2"
 172 #define DIO_ID_SCSI3    0x67 /* ditto */
 173 #define DIO_DESC_SCSI3 "98265A SCSI3"
 174 #define DIO_ID_FBUFFER  0x39 /* framebuffer: flavour is distinguished by secondary ID */
 175 #define DIO_DESC_FBUFFER "bitmapped display"
 176 /* the NetBSD kernel source is a bit unsure as to what these next IDs actually do :-> */
 177 #define DIO_ID_MISC0    0x03 /* 98622A */
 178 #define DIO_DESC_MISC0 "98622A"
 179 #define DIO_ID_MISC1    0x04 /* 98623A */
 180 #define DIO_DESC_MISC1 "98623A"
 181 #define DIO_ID_PARALLEL 0x06 /* internal parallel */
 182 #define DIO_DESC_PARALLEL "internal parallel"
 183 #define DIO_ID_MISC2    0x09 /* 98287A keyboard */
 184 #define DIO_DESC_MISC2 "98287A keyboard"
 185 #define DIO_ID_MISC3    0x0a /* HP98635A FP accelerator */
 186 #define DIO_DESC_MISC3 "HP98635A FP accelerator"
 187 #define DIO_ID_MISC4    0x0b /* timer */
 188 #define DIO_DESC_MISC4 "timer"
 189 #define DIO_ID_MISC5    0x12 /* 98640A */
 190 #define DIO_DESC_MISC5 "98640A"
 191 #define DIO_ID_MISC6    0x16 /* 98659A */
 192 #define DIO_DESC_MISC6 "98659A"
 193 #define DIO_ID_MISC7    0x19 /* 237 display */
 194 #define DIO_DESC_MISC7 "237 display"
 195 #define DIO_ID_MISC8    0x1a /* quad-wide card */
 196 #define DIO_DESC_MISC8 "quad-wide card"
 197 #define DIO_ID_MISC9    0x1b /* 98253A */
 198 #define DIO_DESC_MISC9 "98253A"
 199 #define DIO_ID_MISC10   0x1c /* 98627A */
 200 #define DIO_DESC_MISC10 "98253A"
 201 #define DIO_ID_MISC11   0x1d /* 98633A */
 202 #define DIO_DESC_MISC11 "98633A"
 203 #define DIO_ID_MISC12   0x1e /* 98259A */
 204 #define DIO_DESC_MISC12 "98259A"
 205 #define DIO_ID_MISC13   0x1f /* 8741 */
 206 #define DIO_DESC_MISC13 "8741"
 207 #define DIO_ID_VME      0x31 /* 98577A VME adapter */
 208 #define DIO_DESC_VME "98577A VME adapter"
 209 #define DIO_ID_DCL      0x34 /* 98628A serial */
 210 #define DIO_DESC_DCL "98628A DCL serial"
 211 #define DIO_ID_DCLREM   0xb4 /* 98628A serial */
 212 #define DIO_DESC_DCLREM "98628A DCLREM serial"
 213 /* These are the secondary IDs for the framebuffers */
 214 #define DIO_ID2_GATORBOX    0x01 /* 98700/98710 "gatorbox" */
 215 #define DIO_DESC2_GATORBOX       "98700/98710 \"gatorbox\" display"
 216 #define DIO_ID2_TOPCAT      0x02 /* 98544/98545/98547 "topcat" */
 217 #define DIO_DESC2_TOPCAT         "98544/98545/98547 \"topcat\" display"
 218 #define DIO_ID2_RENAISSANCE 0x04 /* 98720/98721 "renaissance" */
 219 #define DIO_DESC2_RENAISSANCE    "98720/98721 \"renaissance\" display"
 220 #define DIO_ID2_LRCATSEYE   0x05 /* lowres "catseye" */
 221 #define DIO_DESC2_LRCATSEYE      "low-res catseye display"
 222 #define DIO_ID2_HRCCATSEYE  0x06 /* highres colour "catseye" */
 223 #define DIO_DESC2_HRCCATSEYE     "high-res color catseye display"
 224 #define DIO_ID2_HRMCATSEYE  0x07 /* highres mono "catseye" */
 225 #define DIO_DESC2_HRMCATSEYE     "high-res mono catseye display"
 226 #define DIO_ID2_DAVINCI     0x08 /* 98730/98731 "davinci" */
 227 #define DIO_DESC2_DAVINCI        "98730/98731 \"davinci\" display"
 228 #define DIO_ID2_XXXCATSEYE  0x09 /* "catseye" */
 229 #define DIO_DESC2_XXXCATSEYE     "catseye display"
 230 #define DIO_ID2_HYPERION    0x0e /* A1096A "hyperion" */
 231 #define DIO_DESC2_HYPERION       "A1096A \"hyperion\" display"
 232 #define DIO_ID2_XGENESIS    0x0b /* "x-genesis"; no NetBSD support */
 233 #define DIO_DESC2_XGENESIS       "\"x-genesis\" display"
 234 #define DIO_ID2_TIGER       0x0c /* "tiger"; no NetBSD support */
 235 #define DIO_DESC2_TIGER          "\"tiger\" display"
 236 #define DIO_ID2_YGENESIS    0x0d /* "y-genesis"; no NetBSD support */
 237 #define DIO_DESC2_YGENESIS       "\"y-genesis\" display"
 238 /* if you add new IDs then you should tell dio.c about them so it can
 239  * identify them...
 240  */
 241
 242 extern int dio_find(int deviceid);
 243 extern unsigned long dio_scodetophysaddr(int scode);
 244 extern void dio_create_sysfs_dev_files(struct dio_dev *);
 245
 246 /* New-style probing */
 247 extern int dio_register_driver(struct dio_driver *);
 248 extern void dio_unregister_driver(struct dio_driver *);
 249 extern const struct dio_device_id *dio_match_device(const struct dio_device_id *ids, const struct dio_dev *z);
 250 static inline struct dio_driver *dio_dev_driver(const struct dio_dev *d)
 251 {
 252     return d->driver;
 253 }
 254
 255 #define dio_resource_start(d) ((d)->resource.start)
 256 #define dio_resource_end(d)   ((d)->resource.end)
 257 #define dio_resource_len(d)   ((d)->resource.end-(d)->resource.start+1)
 258 #define dio_resource_flags(d) ((d)->resource.flags)
 259
 260 #define dio_request_device(d, name) \
 261     request_mem_region(dio_resource_start(d), dio_resource_len(d), name)
 262 #define dio_release_device(d) \
 263     release_mem_region(dio_resource_start(d), dio_resource_len(d))
 264
 265 /* Similar to the helpers above, these manipulate per-dio_dev
 266  * driver-specific data.  They are really just a wrapper around
 267  * the generic device structure functions of these calls.
 268  */
 269 static inline void *dio_get_drvdata (struct dio_dev *d)
 270 {
 271         return dev_get_drvdata(&d->dev);
 272 }
 273
 274 static inline void dio_set_drvdata (struct dio_dev *d, void *data)
 275 {
 276         dev_set_drvdata(&d->dev, data);
 277 }
 278
 279 /*
 280  * A helper function which helps ensure correct dio_driver
 281  * setup and cleanup for commonly-encountered hotplug/modular cases
 282  *
 283  * This MUST stay in a header, as it checks for -DMODULE
 284  */
 285 static inline int dio_module_init(struct dio_driver *drv)
 286 {
 287         int rc = dio_register_driver(drv);
 288
 289         if (rc > 0)
 290                 return 0;
 291
 292         /* iff CONFIG_HOTPLUG and built into kernel, we should
 293          * leave the driver around for future hotplug events.
 294          * For the module case, a hotplug daemon of some sort
 295          * should load a module in response to an insert event. */
 296 #if defined(CONFIG_HOTPLUG) && !defined(MODULE)
 297         if (rc == 0)
 298                 return 0;
 299 #else
 300         if (rc == 0)
 301                 rc = -ENODEV;
 302 #endif
 303
 304         /* if we get here, we need to clean up DIO driver instance
 305          * and return some sort of error */
 306         dio_unregister_driver(drv);
 307
 308         return rc;
 309 }
 310
 311 #endif /* __KERNEL__ */
 312 #endif /* ndef _LINUX_DIO_H */