Home | History | Annotate | Line # | Download | only in ic
smc93cx6var.h revision 1.5 
      1 /*	$NetBSD: smc93cx6var.h,v 1.5 2000/03/15 02:08:31 fvdl Exp $	*/
      2 
      3 /*
      4  * Interface to the 93C46 serial EEPROM that is used to store BIOS
      5  * settings for the aic7xxx based adaptec SCSI controllers.  It can
      6  * also be used for 93C26 and 93C06 serial EEPROMS.
      7  *
      8  * Copyright (c) 1994, 1995 Justin T. Gibbs.
      9  * All rights reserved.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions, and the following disclaimer,
     16  *    without modification.
     17  * 2. The name of the author may not be used to endorse or promote products
     18  *    derived from this software without specific prior written permission.
     19  *
     20  * Alternatively, this software may be distributed under the terms of the
     21  * the GNU Public License ("GPL").
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
     27  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  * $FreeBSD: src/sys/dev/aic7xxx/aic7xxx.c,v 1.40 2000/01/07 23:08:17 gibbs Exp $
     36  */
     37 
     38 #include <sys/param.h>
     39 #if !defined(__NetBSD__)
     40 #include <sys/systm.h>
     41 #endif
     42 
     43 typedef enum {
     44 	C46 = 6,
     45 	C56_66 = 8
     46 } seeprom_chip_t;
     47 
     48 struct seeprom_descriptor {
     49 	bus_space_tag_t sd_tag;
     50 	bus_space_handle_t sd_bsh;
     51 	bus_size_t sd_control_offset;
     52 	bus_size_t sd_status_offset;
     53 	bus_size_t sd_dataout_offset;
     54 	seeprom_chip_t sd_chip;
     55 	u_int16_t sd_MS;
     56 	u_int16_t sd_RDY;
     57 	u_int16_t sd_CS;
     58 	u_int16_t sd_CK;
     59 	u_int16_t sd_DO;
     60 	u_int16_t sd_DI;
     61 };
     62 
     63 /*
     64  * This function will read count 16-bit words from the serial EEPROM and
     65  * return their value in buf.  The port address of the aic7xxx serial EEPROM
     66  * control register is passed in as offset.  The following parameters are
     67  * also passed in:
     68  *
     69  *   CS  - Chip select
     70  *   CK  - Clock
     71  *   DO  - Data out
     72  *   DI  - Data in
     73  *   RDY - SEEPROM ready
     74  *   MS  - Memory port mode select
     75  *
     76  *  A failed read attempt returns 0, and a successful read returns 1.
     77  */
     78 
     79 #define SEEPROM_INB(sd) \
     80 	bus_space_read_1(sd->sd_tag, sd->sd_bsh, sd->sd_control_offset)
     81 #define SEEPROM_OUTB(sd, value) \
     82 	bus_space_write_1(sd->sd_tag, sd->sd_bsh, sd->sd_control_offset, value)
     83 #define SEEPROM_STATUS_INB(sd) \
     84 	bus_space_read_1(sd->sd_tag, sd->sd_bsh, sd->sd_status_offset)
     85 #define SEEPROM_DATA_INB(sd) \
     86 	bus_space_read_1(sd->sd_tag, sd->sd_bsh, sd->sd_dataout_offset)
     87 
     88 int read_seeprom(struct seeprom_descriptor *sd, u_int16_t *buf,
     89 		 bus_size_t start_addr, bus_size_t count);
     90