* 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 arch/m68k/hp300/dio.c
+ * This goes with drivers/dio/dio.c
*/
#ifndef _LINUX_DIO_H
* 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 */
-
-/* The internal HPIB device is special; this is its physaddr; its select code is 7.
- * The reason why we have to treat it specially is because apparently it's broken:
- * the device ID isn't consistent/reliable. *sigh*
- */
-#define DIO_IHPIBADDR 0x47800
-#define DIO_IHPIBSCODE 7
-
-/* If we don't have the internal HPIB defined, then treat select code 7 like
- * any other. If we *do* have internal HPIB, then we just have to assume that
- * select code 7 is the internal HPIB regardless of the ID register :-<
- */
-#define CONFIG_IHPIB /* hack hack : not yet a proper config option */
-#ifdef CONFIG_IHPIB
-#define DIO_ISIHPIB(scode) ((scode) == DIO_IHPIBSCODE)
-#else
-#define DIO_ISIHPIB(scode) 0
-#endif
-
-#define DIO_VIRADDRBASE 0xf0000000 /* vir addr where IOspace is mapped */
+#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 */
/* 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 32
+#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)
* 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))
+#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_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 0x80 /* 98624A HP-IB (normal ie slow) */
+#define DIO_ID_NHPIB 0x01 /* 98624A HP-IB (normal ie slow) */
#define DIO_DESC_NHPIB "98624A HPIB"
-#define DIO_ID_IHPIB 0x00 /* internal HPIB (not its real ID, it hasn't got one! */
-#define DIO_DESC_IHPIB "internal HPIB"
-#define DIO_ID_SCSI0 0x07 /* 98625A SCSI */
-#define DIO_DESC_SCSI0 "98625A SCSI0"
+#define DIO_ID_SCSI0 0x07 /* 98265A SCSI */
+#define DIO_DESC_SCSI0 "98265A SCSI0"
#define DIO_ID_SCSI1 0x27 /* ditto */
-#define DIO_DESC_SCSI1 "98625A SCSI1"
+#define DIO_DESC_SCSI1 "98265A SCSI1"
#define DIO_ID_SCSI2 0x47 /* ditto */
-#define DIO_DESC_SCSI2 "98625A SCSI2"
+#define DIO_DESC_SCSI2 "98265A SCSI2"
#define DIO_ID_SCSI3 0x67 /* ditto */
-#define DIO_DESC_SCSI3 "98625A SCSI3"
+#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 :-> */
*/
extern int dio_find(int deviceid);
-extern void *dio_scodetoviraddr(int scode);
-extern int dio_scodetoipl(int scode);
-extern const char *dio_scodetoname(int scode);
-extern void dio_config_board(int scode);
-extern void dio_unconfig_board(int scode);
+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 */
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