Annotation of sys/arch/macppc/include/z8530var.h, Revision 1.1
1.1 ! nbrk 1: /* $NetBSD: z8530var.h,v 1.5 2002/03/17 19:40:45 atatat Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1994 Gordon W. Ross
! 5: * Copyright (c) 1992, 1993
! 6: * The Regents of the University of California. All rights reserved.
! 7: *
! 8: * This software was developed by the Computer Systems Engineering group
! 9: * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
! 10: * contributed to Berkeley.
! 11: *
! 12: * All advertising materials mentioning features or use of this software
! 13: * must display the following acknowledgement:
! 14: * This product includes software developed by the University of
! 15: * California, Lawrence Berkeley Laboratory.
! 16: *
! 17: * Redistribution and use in source and binary forms, with or without
! 18: * modification, are permitted provided that the following conditions
! 19: * are met:
! 20: * 1. Redistributions of source code must retain the above copyright
! 21: * notice, this list of conditions and the following disclaimer.
! 22: * 2. Redistributions in binary form must reproduce the above copyright
! 23: * notice, this list of conditions and the following disclaimer in the
! 24: * documentation and/or other materials provided with the distribution.
! 25: * 3. Neither the name of the University nor the names of its contributors
! 26: * may be used to endorse or promote products derived from this software
! 27: * without specific prior written permission.
! 28: *
! 29: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 30: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 31: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 32: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 33: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 34: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 35: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 36: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 37: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 38: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 39: * SUCH DAMAGE.
! 40: *
! 41: * @(#)zsvar.h 8.1 (Berkeley) 6/11/93
! 42: */
! 43:
! 44: #include <macppc/dev/z8530sc.h>
! 45: #include <macppc/dev/dbdma.h>
! 46:
! 47: /*
! 48: * Clock source info structure, added here so xzs_chanstate works
! 49: */
! 50: struct zsclksrc {
! 51: long clk; /* clock rate, in MHz, present on signal line */
! 52: int flags; /* Specifies how this source can be used
! 53: (RTxC divided, RTxC BRG, PCLK BRG, TRxC divided)
! 54: and also if the source is "external" and if it
! 55: is changeable (by an ioctl ex.). The
! 56: source usage flags are used by the tty
! 57: child. The other bits tell zsloadchannelregs
! 58: if it should call an md signal source
! 59: changing routine. ZSC_VARIABLE says if
! 60: an ioctl should be able to cahnge the
! 61: clock rate.*/
! 62: };
! 63: #define ZSC_PCLK 0x01
! 64: #define ZSC_RTXBRG 0x02
! 65: #define ZSC_RTXDIV 0x04
! 66: #define ZSC_TRXDIV 0x08
! 67: #define ZSC_VARIABLE 0x40
! 68: #define ZSC_EXTERN 0x80
! 69:
! 70: #define ZSC_BRG 0x03
! 71: #define ZSC_DIV 0x0c
! 72:
! 73:
! 74: /*
! 75: * These are the machine-dependent (extended) variants of
! 76: * struct zs_chanstate and struct zsc_softc
! 77: */
! 78: struct xzs_chanstate {
! 79: /* machine-independent part (First!)*/
! 80: struct zs_chanstate xzs_cs;
! 81: /* machine-dependent extensions */
! 82: int cs_hwflags;
! 83: int cs_chip; /* type of chip */
! 84: /* Clock source info... */
! 85: int cs_clock_count; /* how many signal sources available */
! 86: struct zsclksrc cs_clocks[4]; /* info on available signal sources */
! 87: long cs_cclk_flag; /* flag for current clock source */
! 88: long cs_pclk_flag; /* flag for pending clock source */
! 89: int cs_csource; /* current source # */
! 90: int cs_psource; /* pending source # */
! 91: };
! 92:
! 93: struct zsc_softc {
! 94: struct device zsc_dev; /* required first: base device */
! 95: struct zs_chanstate *zsc_cs[2]; /* channel A and B soft state */
! 96: /* Machine-dependent part follows... */
! 97: struct xzs_chanstate xzsc_xcs_store[2];
! 98: dbdma_regmap_t *zsc_txdmareg[2];
! 99: dbdma_command_t *zsc_txdmacmd[2];
! 100: /* XXX tx only, for now */
! 101: };
! 102:
! 103: /*
! 104: * Functions to read and write individual registers in a channel.
! 105: * The ZS chip requires a 1.6 uSec. recovery time between accesses,
! 106: * and the Sun3 hardware does NOT take care of this for you.
! 107: * MacII hardware DOES dake care of the delay for us. :-)
! 108: * XXX - Then these should be inline functions! -gwr
! 109: * Some clock-chirped macs lose serial ports. It could be that the
! 110: * hardware delay is tied to the CPU speed, and that the minimum delay
! 111: * no longer's respected. For them, ZS_DELAY might help.
! 112: * XXX - no one seems to want to try and check this -wrs
! 113: */
! 114:
! 115: u_char zs_read_reg(struct zs_chanstate *cs, u_char reg);
! 116: u_char zs_read_csr(struct zs_chanstate *cs);
! 117: u_char zs_read_data(struct zs_chanstate *cs);
! 118:
! 119: void zs_write_reg(struct zs_chanstate *cs, u_char reg, u_char val);
! 120: void zs_write_csr(struct zs_chanstate *cs, u_char val);
! 121: void zs_write_data(struct zs_chanstate *cs, u_char val);
! 122:
! 123: /* XXX - Could define splzs() here instead of in psl.h */
! 124: #define splzs spltty
! 125:
! 126: /* Hook for MD ioctl support */
! 127: int zsmdioctl(struct zs_chanstate *cs, u_long cmd, caddr_t data);
! 128: /* XXX - This is a bit gross... */
! 129: /*
! 130: #define ZS_MD_IOCTL(cs, cmd, data) zsmdioctl(cs, cmd, data)
! 131: */
! 132:
! 133: /* Callback for "external" clock sources */
! 134: void zsmd_setclock(struct zs_chanstate *cs);
! 135: #define ZS_MD_SETCLK(cs) zsmd_setclock(cs)
! 136:
! 137: #define PCLK (9600 * 384) /* PCLK pin input clock rate */
! 138:
! 139: /* The layout of this is hardware-dependent (padding, order). */
! 140: struct zschan {
! 141: volatile u_char zc_csr; /* ctrl,status, and indirect access */
! 142: u_char zc_xxx0[15];
! 143: volatile u_char zc_data; /* data */
! 144: u_char zc_xxx1[15];
! 145: };
! 146: void zs_kgdb_init (void);
! 147:
! 148: #ifndef ZSCCF_CHANNEL
! 149: #define ZSCCF_CHANNEL 0
! 150: #define ZSCCF_CHANNEL_DEFAULT -1
! 151: #endif
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