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Diffstat (limited to 'include/linux/dio.h')
| -rw-r--r-- | include/linux/dio.h | 312 |
1 files changed, 312 insertions, 0 deletions
diff --git a/include/linux/dio.h b/include/linux/dio.h new file mode 100644 index 00000000000..fae9395fcf4 --- /dev/null +++ b/include/linux/dio.h @@ -0,0 +1,312 @@ +/* header file for DIO boards for the HP300 architecture. + * Maybe this should handle DIO-II later? + * The general structure of this is vaguely based on how + * the Amiga port handles Zorro boards. + * Copyright (C) Peter Maydell 05/1998 <pmaydell@chiark.greenend.org.uk> + * Converted to driver model Jochen Friedrich <jochen@scram.de> + * + * The board IDs are from the NetBSD kernel, which for once provided + * helpful comments... + * + * This goes with drivers/dio/dio.c + */ + +#ifndef _LINUX_DIO_H +#define _LINUX_DIO_H + +/* The DIO boards in a system are distinguished by 'select codes' which + * range from 0-63 (DIO) and 132-255 (DIO-II). + * The DIO board with select code sc is located at physical address + * 0x600000 + sc * 0x10000 + * So DIO cards cover [0x600000-0x800000); the areas [0x200000-0x400000) and + * [0x800000-0x1000000) are for additional space required by things + * like framebuffers. [0x400000-0x600000) is for miscellaneous internal I/O. + * On Linux, this is currently all mapped into the virtual address space + * at 0xf0000000 on bootup. + * DIO-II boards are at 0x1000000 + (sc - 132) * 0x400000 + * which is address range [0x1000000-0x20000000) -- too big to map completely, + * so currently we just don't handle DIO-II boards. It wouldn't be hard to + * do with ioremap() though. + */ + +#include <linux/device.h> + +#ifdef __KERNEL__ + +#include <asm/hp300hw.h> + +typedef __u16 dio_id; + + /* + * DIO devices + */ + +struct dio_dev { + struct dio_bus *bus; + dio_id id; + int scode; + struct dio_driver *driver; /* which driver has allocated this device */ + struct device dev; /* Generic device interface */ + u8 ipl; + char name[64]; + struct resource resource; +}; + +#define to_dio_dev(n) container_of(n, struct dio_dev, dev) + + /* + * DIO bus + */ + +struct dio_bus { + struct list_head devices; /* list of devices on this bus */ + unsigned int num_resources; /* number of resources */ + struct resource resources[2]; /* address space routed to this bus */ + struct device dev; + char name[10]; +}; + +extern struct dio_bus dio_bus; /* Single DIO bus */ +extern struct bus_type dio_bus_type; + + /* + * DIO device IDs + */ + +struct dio_device_id { + dio_id id; /* Device ID or DIO_WILDCARD */ + unsigned long driver_data; /* Data private to the driver */ +}; + + /* + * DIO device drivers + */ + +struct dio_driver { + struct list_head node; + char *name; + const struct dio_device_id *id_table; /* NULL if wants all devices */ + int (*probe)(struct dio_dev *z, const struct dio_device_id *id); +/* New device inserted */ + void (*remove)(struct dio_dev *z); /* Device removed (NULL if not a hot-plug capable driver) */ + struct device_driver driver; +}; + +#define to_dio_driver(drv) container_of(drv, struct dio_driver, driver) + +/* DIO/DIO-II boards all have the following 8bit registers. + * These are offsets from the base of the device. + */ +#define DIO_IDOFF 0x01 /* primary device ID */ +#define DIO_IPLOFF 0x03 /* interrupt priority level */ +#define DIO_SECIDOFF 0x15 /* secondary device ID */ +#define DIOII_SIZEOFF 0x101 /* device size, DIO-II only */ +#define DIO_VIRADDRBASE 0xf0000000UL /* vir addr where IOspace is mapped */ + +#define DIO_BASE 0x600000 /* start of DIO space */ +#define DIO_END 0x1000000 /* end of DIO space */ +#define DIO_DEVSIZE 0x10000 /* size of a DIO device */ + +#define DIOII_BASE 0x01000000 /* start of DIO-II space */ +#define DIOII_END 0x20000000 /* end of DIO-II space */ +#define DIOII_DEVSIZE 0x00400000 /* size of a DIO-II device */ + +/* Highest valid select code. If we add DIO-II support this should become + * 256 for everything except HP320, which only has DIO. + */ +#define DIO_SCMAX (hp300_model == HP_320 ? 32 : 256) +#define DIOII_SCBASE 132 /* lowest DIO-II select code */ +#define DIO_SCINHOLE(scode) (((scode) >= 32) && ((scode) < DIOII_SCBASE)) +#define DIO_ISDIOII(scode) ((scode) >= 132 && (scode) < 256) + +/* macros to read device IDs, given base address */ +#define DIO_ID(baseaddr) in_8((baseaddr) + DIO_IDOFF) +#define DIO_SECID(baseaddr) in_8((baseaddr) + DIO_SECIDOFF) + +/* extract the interrupt level */ +#define DIO_IPL(baseaddr) (((in_8((baseaddr) + DIO_IPLOFF) >> 4) & 0x03) + 3) + +/* find the size of a DIO-II board's address space. + * DIO boards are all fixed length. + */ +#define DIOII_SIZE(baseaddr) ((in_8((baseaddr) + DIOII_SIZEOFF) + 1) * 0x100000) + +/* general purpose macro for both DIO and DIO-II */ +#define DIO_SIZE(scode, base) (DIO_ISDIOII((scode)) ? DIOII_SIZE((base)) : DIO_DEVSIZE) + +/* The hardware has primary and secondary IDs; we encode these in a single + * int as PRIMARY ID & (SECONDARY ID << 8). + * In practice this is only important for framebuffers, + * and everybody else just sets ID fields equal to the DIO_ID_FOO value. + */ +#define DIO_ENCODE_ID(pr,sec) ((((int)sec & 0xff) << 8) | ((int)pr & 0xff)) +/* macro to determine whether a given primary ID requires a secondary ID byte */ +#define DIO_NEEDSSECID(id) ((id) == DIO_ID_FBUFFER) +#define DIO_WILDCARD 0xff + +/* Now a whole slew of macros giving device IDs and descriptive strings: */ +#define DIO_ID_DCA0 0x02 /* 98644A serial */ +#define DIO_DESC_DCA0 "98644A DCA0 serial" +#define DIO_ID_DCA0REM 0x82 /* 98644A serial */ +#define DIO_DESC_DCA0REM "98644A DCA0REM serial" +#define DIO_ID_DCA1 0x42 /* 98644A serial */ +#define DIO_DESC_DCA1 "98644A DCA1 serial" +#define DIO_ID_DCA1REM 0xc2 /* 98644A serial */ +#define DIO_DESC_DCA1REM "98644A DCA1REM serial" +#define DIO_ID_DCM 0x05 /* 98642A serial MUX */ +#define DIO_DESC_DCM "98642A DCM serial MUX" +#define DIO_ID_DCMREM 0x85 /* 98642A serial MUX */ +#define DIO_DESC_DCMREM "98642A DCMREM serial MUX" +#define DIO_ID_LAN 0x15 /* 98643A LAN */ +#define DIO_DESC_LAN "98643A LANCE ethernet" +#define DIO_ID_FHPIB 0x08 /* 98625A/98625B fast HP-IB */ +#define DIO_DESC_FHPIB "98625A/98625B fast HPIB" +#define DIO_ID_NHPIB 0x01 /* 98624A HP-IB (normal ie slow) */ +#define DIO_DESC_NHPIB "98624A HPIB" +#define DIO_ID_SCSI0 0x07 /* 98265A SCSI */ +#define DIO_DESC_SCSI0 "98265A SCSI0" +#define DIO_ID_SCSI1 0x27 /* ditto */ +#define DIO_DESC_SCSI1 "98265A SCSI1" +#define DIO_ID_SCSI2 0x47 /* ditto */ +#define DIO_DESC_SCSI2 "98265A SCSI2" +#define DIO_ID_SCSI3 0x67 /* ditto */ +#define DIO_DESC_SCSI3 "98265A SCSI3" +#define DIO_ID_FBUFFER 0x39 /* framebuffer: flavour is distinguished by secondary ID */ +#define DIO_DESC_FBUFFER "bitmapped display" +/* the NetBSD kernel source is a bit unsure as to what these next IDs actually do :-> */ +#define DIO_ID_MISC0 0x03 /* 98622A */ +#define DIO_DESC_MISC0 "98622A" +#define DIO_ID_MISC1 0x04 /* 98623A */ +#define DIO_DESC_MISC1 "98623A" +#define DIO_ID_PARALLEL 0x06 /* internal parallel */ +#define DIO_DESC_PARALLEL "internal parallel" +#define DIO_ID_MISC2 0x09 /* 98287A keyboard */ +#define DIO_DESC_MISC2 "98287A keyboard" +#define DIO_ID_MISC3 0x0a /* HP98635A FP accelerator */ +#define DIO_DESC_MISC3 "HP98635A FP accelerator" +#define DIO_ID_MISC4 0x0b /* timer */ +#define DIO_DESC_MISC4 "timer" +#define DIO_ID_MISC5 0x12 /* 98640A */ +#define DIO_DESC_MISC5 "98640A" +#define DIO_ID_MISC6 0x16 /* 98659A */ +#define DIO_DESC_MISC6 "98659A" +#define DIO_ID_MISC7 0x19 /* 237 display */ +#define DIO_DESC_MISC7 "237 display" +#define DIO_ID_MISC8 0x1a /* quad-wide card */ +#define DIO_DESC_MISC8 "quad-wide card" +#define DIO_ID_MISC9 0x1b /* 98253A */ +#define DIO_DESC_MISC9 "98253A" +#define DIO_ID_MISC10 0x1c /* 98627A */ +#define DIO_DESC_MISC10 "98253A" +#define DIO_ID_MISC11 0x1d /* 98633A */ +#define DIO_DESC_MISC11 "98633A" +#define DIO_ID_MISC12 0x1e /* 98259A */ +#define DIO_DESC_MISC12 "98259A" +#define DIO_ID_MISC13 0x1f /* 8741 */ +#define DIO_DESC_MISC13 "8741" +#define DIO_ID_VME 0x31 /* 98577A VME adapter */ +#define DIO_DESC_VME "98577A VME adapter" +#define DIO_ID_DCL 0x34 /* 98628A serial */ +#define DIO_DESC_DCL "98628A DCL serial" +#define DIO_ID_DCLREM 0xb4 /* 98628A serial */ +#define DIO_DESC_DCLREM "98628A DCLREM serial" +/* These are the secondary IDs for the framebuffers */ +#define DIO_ID2_GATORBOX 0x01 /* 98700/98710 "gatorbox" */ +#define DIO_DESC2_GATORBOX "98700/98710 \"gatorbox\" display" +#define DIO_ID2_TOPCAT 0x02 /* 98544/98545/98547 "topcat" */ +#define DIO_DESC2_TOPCAT "98544/98545/98547 \"topcat\" display" +#define DIO_ID2_RENAISSANCE 0x04 /* 98720/98721 "renaissance" */ +#define DIO_DESC2_RENAISSANCE "98720/98721 \"renaissance\" display" +#define DIO_ID2_LRCATSEYE 0x05 /* lowres "catseye" */ +#define DIO_DESC2_LRCATSEYE "low-res catseye display" +#define DIO_ID2_HRCCATSEYE 0x06 /* highres colour "catseye" */ +#define DIO_DESC2_HRCCATSEYE "high-res color catseye display" +#define DIO_ID2_HRMCATSEYE 0x07 /* highres mono "catseye" */ +#define DIO_DESC2_HRMCATSEYE "high-res mono catseye display" +#define DIO_ID2_DAVINCI 0x08 /* 98730/98731 "davinci" */ +#define DIO_DESC2_DAVINCI "98730/98731 \"davinci\" display" +#define DIO_ID2_XXXCATSEYE 0x09 /* "catseye" */ +#define DIO_DESC2_XXXCATSEYE "catseye display" +#define DIO_ID2_HYPERION 0x0e /* A1096A "hyperion" */ +#define DIO_DESC2_HYPERION "A1096A \"hyperion\" display" +#define DIO_ID2_XGENESIS 0x0b /* "x-genesis"; no NetBSD support */ +#define DIO_DESC2_XGENESIS "\"x-genesis\" display" +#define DIO_ID2_TIGER 0x0c /* "tiger"; no NetBSD support */ +#define DIO_DESC2_TIGER "\"tiger\" display" +#define DIO_ID2_YGENESIS 0x0d /* "y-genesis"; no NetBSD support */ +#define DIO_DESC2_YGENESIS "\"y-genesis\" display" +/* if you add new IDs then you should tell dio.c about them so it can + * identify them... + */ + +extern int dio_find(int deviceid); +extern unsigned long dio_scodetophysaddr(int scode); +extern void dio_create_sysfs_dev_files(struct dio_dev *); + +/* New-style probing */ +extern int dio_register_driver(struct dio_driver *); +extern void dio_unregister_driver(struct dio_driver *); +extern const struct dio_device_id *dio_match_device(const struct dio_device_id *ids, const struct dio_dev *z); +static inline struct dio_driver *dio_dev_driver(const struct dio_dev *d) +{ + return d->driver; +} + +#define dio_resource_start(d) ((d)->resource.start) +#define dio_resource_end(d) ((d)->resource.end) +#define dio_resource_len(d) ((d)->resource.end-(d)->resource.start+1) +#define dio_resource_flags(d) ((d)->resource.flags) + +#define dio_request_device(d, name) \ + request_mem_region(dio_resource_start(d), dio_resource_len(d), name) +#define dio_release_device(d) \ + release_mem_region(dio_resource_start(d), dio_resource_len(d)) + +/* Similar to the helpers above, these manipulate per-dio_dev + * driver-specific data. They are really just a wrapper around + * the generic device structure functions of these calls. + */ +static inline void *dio_get_drvdata (struct dio_dev *d) +{ + return dev_get_drvdata(&d->dev); +} + +static inline void dio_set_drvdata (struct dio_dev *d, void *data) +{ + dev_set_drvdata(&d->dev, data); +} + +/* + * A helper function which helps ensure correct dio_driver + * setup and cleanup for commonly-encountered hotplug/modular cases + * + * This MUST stay in a header, as it checks for -DMODULE + */ +static inline int dio_module_init(struct dio_driver *drv) +{ + int rc = dio_register_driver(drv); + + if (rc > 0) + return 0; + + /* iff CONFIG_HOTPLUG and built into kernel, we should + * leave the driver around for future hotplug events. + * For the module case, a hotplug daemon of some sort + * should load a module in response to an insert event. */ +#if defined(CONFIG_HOTPLUG) && !defined(MODULE) + if (rc == 0) + return 0; +#else + if (rc == 0) + rc = -ENODEV; +#endif + + /* if we get here, we need to clean up DIO driver instance + * and return some sort of error */ + dio_unregister_driver(drv); + + return rc; +} + +#endif /* __KERNEL__ */ +#endif /* ndef _LINUX_DIO_H */ |