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smc93cx6var.h revision 1.1 
      1 /*
      2  * Interface to the 93C46 serial EEPROM that is used to store BIOS
      3  * settings for the aic7xxx based adaptec SCSI controllers.  It can
      4  * also be used for 93C26 and 93C06 serial EEPROMS.
      5  *
      6  * Copyright (c) 1994, 1995 Justin T. Gibbs.
      7  * All rights reserved.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice immediately at the beginning of the file, without modification,
     14  *    this list of conditions, and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. Absolutely no warranty of function or purpose is made by the author
     19  *    Justin T. Gibbs.
     20  * 4. Modifications may be freely made to this file if the above conditions
     21  *    are met.
     22  *
     23  *      $Id: smc93cx6var.h,v 1.1 1996/05/16 03:59:11 mycroft Exp $
     24  */
     25 
     26 #include <sys/param.h>
     27 #if !defined(__NetBSD__)
     28 #include <sys/systm.h>
     29 #endif
     30 
     31 struct seeprom_descriptor {
     32 #if defined(__FreeBSD__)
     33 	u_long sd_iobase;
     34 #elif defined(__NetBSD__)
     35 	bus_chipset_tag_t sd_bc;
     36 	bus_io_handle_t sd_ioh;
     37 	bus_io_size_t sd_offset;
     38 #endif
     39 	u_int16_t sd_MS;
     40 	u_int16_t sd_RDY;
     41 	u_int16_t sd_CS;
     42 	u_int16_t sd_CK;
     43 	u_int16_t sd_DO;
     44 	u_int16_t sd_DI;
     45 };
     46 
     47 /*
     48  * This function will read count 16-bit words from the serial EEPROM and
     49  * return their value in buf.  The port address of the aic7xxx serial EEPROM
     50  * control register is passed in as offset.  The following parameters are
     51  * also passed in:
     52  *
     53  *   CS  - Chip select
     54  *   CK  - Clock
     55  *   DO  - Data out
     56  *   DI  - Data in
     57  *   RDY - SEEPROM ready
     58  *   MS  - Memory port mode select
     59  *
     60  *  A failed read attempt returns 0, and a successful read returns 1.
     61  */
     62 #if defined(__FreeBSD__)
     63 int read_seeprom __P((struct seeprom_descriptor *sd,
     64     u_int16_t *buf, u_int start_addr, int count));
     65 #elif defined(__NetBSD__)
     66 int read_seeprom __P((struct seeprom_descriptor *sd,
     67     u_int16_t *buf, bus_io_size_t start_addr, bus_io_size_t count));
     68 #endif
     69 int acquire_seeprom __P((struct seeprom_descriptor *sd));
     70 void release_seeprom __P((struct seeprom_descriptor *sd));
     71