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      1 /*	$NetBSD: cpi_nubusvar.h,v 1.4 2012/10/27 17:17:59 chs Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2008 Hauke Fath
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #ifndef CPI_NUBUSVAR_H
     28 #define CPI_NUBUSVAR_H
     29 
     30 /* Where we find the Z8536 CIO in Nubus slot space */
     31 #define CIO_BASE_OFFSET	0x060010
     32 
     33 /* Max. length of card name string */
     34 #define	CPI_CARD_NAME_LEN 64
     35 
     36 /* The CIO lives on the top 8 bit of the 32 bit data bus. */
     37 enum cio_regs {
     38 	CIO_PORTC = 0x03,
     39 	CIO_PORTB = 0x07,
     40 	CIO_PORTA = 0x0b,
     41 	CIO_CTRL  = 0x0f
     42 };
     43 
     44 #define CPI_UNIT(c)	(minor(c) & 0x1f)
     45 
     46 enum lp_state {
     47 	LP_INITIAL = 0,		/* device is closed */
     48 	LP_OPENING,		/* device is about to be opened */
     49 	LP_OPEN,		/* device is open */
     50 	LP_BUSY,		/* busy with data output */
     51 	LP_ASLEEP,		/* waiting for output completion */
     52 };
     53 
     54 /* Bit masks for Centronics status + handshake lines */
     55 enum hsk_lines {
     56 	CPI_RESET = 0x01,	/* PB0 */
     57 	CPI_STROBE = 0x08,	/* PC3 */
     58 	CPI_BUSY = 0x40,	/* PC0 */
     59 	CPI_SELECT = 0x20,	/* PB5 */
     60 	CPI_FAULT = 0x02,	/* PB1 */
     61 	CPI_PAPER_EMPTY = 0x02,	/* PC1 */
     62 	CPI_ACK = 0x04		/* PC2 */
     63 };
     64 
     65 /*
     66  * The CPI board glue logic divides the 10 MHz Nubus clock by 2, and
     67  * feeds it to the 8536 CIO (pin 16). The CIO divides the PCLK clock
     68  * by 2 internally before providing it to its counters.
     69  */
     70 #define CPI_CLK_FREQ (10000000 / 4)
     71 
     72 /* CPI configuration options - we might grow more */
     73 enum cpi_cf_flags {
     74 	CPI_CTC12_IS_TIMECOUNTER = 0x01
     75 };
     76 #define CPI_OPTIONS_MASK	(CPI_CTC12_IS_TIMECOUNTER)
     77 
     78 struct cpi_softc {
     79 	nubus_slot		sc_slot;	/* Nubus slot number */
     80 	char			sc_cardname[CPI_CARD_NAME_LEN];
     81 
     82 	bus_addr_t		sc_basepa;	/* base physical address */
     83 	bus_space_tag_t		sc_bst;
     84 	bus_space_handle_t	sc_bsh;
     85 
     86 	ulong			sc_intcount;	/* Hard interrupts */
     87 	ulong			sc_bytestoport;	/* Bytes written to port */
     88 
     89         struct callout  	sc_wakeupchan;
     90 
     91 #define CPI_BUFSIZE	0x0800
     92         char		      	*sc_printbuf;	/* Driver's print buffer */
     93         size_t          	sc_bufbytes;	/* # of bytes in buffer */
     94         u_char          	*sc_cp;		/* Next byte to send */
     95 
     96         u_char          	sc_lpstate;
     97 
     98 	ulong			sc_options;
     99 
    100 	struct timecounter	sc_timecounter;
    101 };
    102 
    103 #endif /* CPI_NUBUSVAR_H */
    104