isapnp.h

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/**************************************************************************
*
*    isapnp.h -- Etherboot isapnp support for the 3Com 3c515
*    Written 2002-2003 by Timothy Legge <tlegge@rogers.com>
*
*    This program is free software; you can redistribute it and/or modify
*    it under the terms of the GNU General Public License as published by
*    the Free Software Foundation; either version 2 of the License, or
*    (at your option) any later version.
*
*    This program is distributed in the hope that it will be useful,
*    but WITHOUT ANY WARRANTY; without even the implied warranty of
*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*    GNU General Public License for more details.
*
*    You should have received a copy of the GNU General Public License
*    along with this program; if not, write to the Free Software
*    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*    Portions of this code:
*               Copyright (C) 2001  P.J.H.Fox (fox@roestock.demon.co.uk)
*
*
*
*    REVISION HISTORY:
*    ================
*        Version 0.1 April 26, 2002     TJL
*        Version 0.2 01/08/2003                 TJL Renamed from 3c515_isapnp.h
*
*
*    Generalised into an ISAPnP bus that can be used by more than just
*    the 3c515 by Michael Brown <mbrown@fensystems.co.uk>
*
***************************************************************************/

FILE_LICENCE ( GPL2_OR_LATER );

#ifndef ISAPNP_H
#define ISAPNP_H

#include <stdint.h>
#include <gpxe/isa_ids.h>
#include <gpxe/device.h>
#include <gpxe/tables.h>

/*
 * ISAPnP constants
 *
 */

/* Port addresses */
#define ISAPNP_ADDRESS          0x279
#define ISAPNP_WRITE_DATA       0xa79
#define ISAPNP_READ_PORT_MIN    0x203
#define ISAPNP_READ_PORT_START  0x213   /* ISAPnP spec says 0x203, but
                                         * Linux ISAPnP starts at
                                         * 0x213 with no explanatory
                                         * comment.  0x203 probably
                                         * clashes with something. */
#define ISAPNP_READ_PORT_MAX    0x3ff
#define ISAPNP_READ_PORT_STEP   0x10    /* Can be any multiple of 4
                                         * according to the spec, but
                                         * since ISA I/O addresses are
                                         * allocated in blocks of 16,
                                         * it makes no sense to use
                                         * any value less than 16.
                                         */

/* Card select numbers */
#define ISAPNP_CSN_MIN          0x01
#define ISAPNP_CSN_MAX          0x0f

/* Registers */
#define ISAPNP_READPORT                 0x00
#define ISAPNP_SERIALISOLATION          0x01
#define ISAPNP_CONFIGCONTROL            0x02
#define ISAPNP_WAKE                     0x03
#define ISAPNP_RESOURCEDATA             0x04
#define ISAPNP_STATUS                   0x05
#define ISAPNP_CARDSELECTNUMBER         0x06
#define ISAPNP_LOGICALDEVICENUMBER      0x07
#define ISAPNP_ACTIVATE                 0x30
#define ISAPNP_IORANGECHECK             0x31
#define ISAPNP_IOBASE(n)                ( 0x60 + ( (n) * 2 ) )
#define ISAPNP_IRQNO(n)                 ( 0x70 + ( (n) * 2 ) )
#define ISAPNP_IRQTYPE(n)               ( 0x71 + ( (n) * 2 ) )

/* Bits in the CONFIGCONTROL register */
#define ISAPNP_CONFIG_RESET             ( 1 << 0 )
#define ISAPNP_CONFIG_WAIT_FOR_KEY      ( 1 << 1 )
#define ISAPNP_CONFIG_RESET_CSN         ( 1 << 2 )
#define ISAPNP_CONFIG_RESET_DRV         ( ISAPNP_CONFIG_RESET |         \
                                          ISAPNP_CONFIG_WAIT_FOR_KEY |  \
                                          ISAPNP_CONFIG_RESET_CSN )

/* The LFSR used for the initiation key and for checksumming */
#define ISAPNP_LFSR_SEED                0x6a

/* Small tags */
#define ISAPNP_IS_SMALL_TAG(tag)        ( ! ( (tag) & 0x80 ) )
#define ISAPNP_SMALL_TAG_NAME(tag)      ( ( (tag) >> 3 ) & 0xf )
#define ISAPNP_SMALL_TAG_LEN(tag)       ( ( (tag) & 0x7 ) )
#define ISAPNP_TAG_PNPVERNO             0x01
#define ISAPNP_TAG_LOGDEVID             0x02
#define ISAPNP_TAG_COMPATDEVID          0x03
#define ISAPNP_TAG_IRQ                  0x04
#define ISAPNP_TAG_DMA                  0x05
#define ISAPNP_TAG_STARTDEP             0x06
#define ISAPNP_TAG_ENDDEP               0x07
#define ISAPNP_TAG_IOPORT               0x08
#define ISAPNP_TAG_FIXEDIO              0x09
#define ISAPNP_TAG_RSVDSHORTA           0x0A
#define ISAPNP_TAG_RSVDSHORTB           0x0B
#define ISAPNP_TAG_RSVDSHORTC           0x0C
#define ISAPNP_TAG_RSVDSHORTD           0x0D
#define ISAPNP_TAG_VENDORSHORT          0x0E
#define ISAPNP_TAG_END                  0x0F
/* Large tags */
#define ISAPNP_IS_LARGE_TAG(tag)        ( ( (tag) & 0x80 ) )
#define ISAPNP_LARGE_TAG_NAME(tag)      (tag)
#define ISAPNP_TAG_MEMRANGE             0x81
#define ISAPNP_TAG_ANSISTR              0x82
#define ISAPNP_TAG_UNICODESTR           0x83
#define ISAPNP_TAG_VENDORLONG           0x84
#define ISAPNP_TAG_MEM32RANGE           0x85
#define ISAPNP_TAG_FIXEDMEM32RANGE      0x86
#define ISAPNP_TAG_RSVDLONG0            0xF0
#define ISAPNP_TAG_RSVDLONG1            0xF1
#define ISAPNP_TAG_RSVDLONG2            0xF2
#define ISAPNP_TAG_RSVDLONG3            0xF3
#define ISAPNP_TAG_RSVDLONG4            0xF4
#define ISAPNP_TAG_RSVDLONG5            0xF5
#define ISAPNP_TAG_RSVDLONG6            0xF6
#define ISAPNP_TAG_RSVDLONG7            0xF7
#define ISAPNP_TAG_RSVDLONG8            0xF8
#define ISAPNP_TAG_RSVDLONG9            0xF9
#define ISAPNP_TAG_RSVDLONGA            0xFA
#define ISAPNP_TAG_RSVDLONGB            0xFB
#define ISAPNP_TAG_RSVDLONGC            0xFC
#define ISAPNP_TAG_RSVDLONGD            0xFD
#define ISAPNP_TAG_RSVDLONGE            0xFE
#define ISAPNP_TAG_RSVDLONGF            0xFF
#define ISAPNP_TAG_PSEUDO_NEWBOARD      0x100

/** An ISAPnP serial identifier */
struct isapnp_identifier {
        /** Vendor ID */
        uint16_t vendor_id;
        /** Product ID */
        uint16_t prod_id;
        /** Serial number */
        uint32_t serial;
        /** Checksum */
        uint8_t checksum;
} __attribute__ (( packed ));

/** An ISAPnP logical device ID structure */
struct isapnp_logdevid {
        /** Vendor ID */
        uint16_t vendor_id;
        /** Product ID */
        uint16_t prod_id;
        /** Flags */
        uint16_t flags;
} __attribute__ (( packed ));

/** An ISAPnP device ID list entry */
struct isapnp_device_id {
        /** Name */
        const char *name;
        /** Vendor ID */
        uint16_t vendor_id;
        /** Product ID */
        uint16_t prod_id;
};

/** An ISAPnP device */
struct isapnp_device {
        /** Generic device */
        struct device dev;
        /** Vendor ID */
        uint16_t vendor_id;
        /** Product ID */
        uint16_t prod_id;
        /** I/O address */
        uint16_t ioaddr;
        /** Interrupt number */
        uint8_t irqno;
        /** Card Select Number */
        uint8_t csn;
        /** Logical Device ID */
        uint8_t logdev;
        /** Driver for this device */
        struct isapnp_driver *driver;
        /** Driver-private data
         *
         * Use isapnp_set_drvdata() and isapnp_get_drvdata() to access
         * this field.
         */
        void *priv;
        /** Driver name */
        const char *driver_name;
};

/** An ISAPnP driver */
struct isapnp_driver {
        /** ISAPnP ID table */
        struct isapnp_device_id *ids;
        /** Number of entries in ISAPnP ID table */
        unsigned int id_count;
        /**
         * Probe device
         *
         * @v isapnp    ISAPnP device
         * @v id        Matching entry in ID table
         * @ret rc      Return status code
         */
        int ( * probe ) ( struct isapnp_device *isapnp,
                          const struct isapnp_device_id *id );
        /**
         * Remove device
         *
         * @v isapnp    ISAPnP device
         */
        void ( * remove ) ( struct isapnp_device *isapnp );
};

/** ISAPnP driver table */
#define ISAPNP_DRIVERS __table ( struct isapnp_driver, "isapnp_drivers" )

/** Declare an ISAPnP driver */
#define __isapnp_driver __table_entry ( ISAPNP_DRIVERS, 01 )

extern uint16_t isapnp_read_port;

extern void isapnp_device_activation ( struct isapnp_device *isapnp,
                                       int activation );

/**
 * Activate ISAPnP device
 *
 * @v isapnp            ISAPnP device
 */
static inline void activate_isapnp_device ( struct isapnp_device *isapnp ) {
        isapnp_device_activation ( isapnp, 1 );
}

/**
 * Deactivate ISAPnP device
 *
 * @v isapnp            ISAPnP device
 */
static inline void deactivate_isapnp_device ( struct isapnp_device *isapnp ) {
        isapnp_device_activation ( isapnp, 0 );
}

/**
 * Set ISAPnP driver-private data
 *
 * @v isapnp            ISAPnP device
 * @v priv              Private data
 */
static inline void isapnp_set_drvdata ( struct isapnp_device *isapnp,
                                        void *priv ) {
        isapnp->priv = priv;
}

/**
 * Get ISAPnP driver-private data
 *
 * @v isapnp            ISAPnP device
 * @ret priv            Private data
 */
static inline void * isapnp_get_drvdata ( struct isapnp_device *isapnp ) {
        return isapnp->priv;
}

#endif /* ISAPNP_H */