sys/arch/hp700/gsc/lpt_gsc.c

   1 /*      $NetBSD: lpt_gsc.c,v 1.10 2009/05/08 09:33:58 skrll Exp $       */
   2
   3 /*      $OpenBSD: lpt_gsc.c,v 1.6 2000/07/21 17:41:06 mickey Exp $      */
   4
   5 /*
   6  * Copyright (c) 1998 Michael Shalayeff
   7  * Copyright (c) 1993, 1994 Charles Hannum.
   8  * Copyright (c) 1990 William F. Jolitz, TeleMuse
   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  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *      This software is a component of "386BSD" developed by
  22  *      William F. Jolitz, TeleMuse.
  23  * 4. Neither the name of the developer nor the name "386BSD"
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ
  28  * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS
  29  * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT.
  30  * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT
  31  * NOT MAKE USE OF THIS WORK.
  32  *
  33  * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
  34  * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN
  35  * REFERENCES SUCH AS THE  "PORTING UNIX TO THE 386" SERIES
  36  * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING
  37  * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND
  38  * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE
  39  * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS
  40  * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND
  43  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  44  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  45  * ARE DISCLAIMED.  IN NO EVENT SHALL THE DEVELOPER BE LIABLE
  46  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  47  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  48  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  50  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  51  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  52  * SUCH DAMAGE.
  53  */
  54
  55 #include <sys/cdefs.h>
  56 __KERNEL_RCSID(0, "$NetBSD: lpt_gsc.c,v 1.10 2009/05/08 09:33:58 skrll Exp $");
  57
  58 #include <sys/param.h>
  59 #include <sys/systm.h>
  60 #include <sys/device.h>
  61
  62 #include <machine/bus.h>
  63 #include <machine/intr.h>
  64 #include <machine/iomod.h>
  65 #include <machine/autoconf.h>
  66
  67 #include <dev/ic/lptreg.h>
  68 #include <dev/ic/lptvar.h>
  69
  70 #include <hp700/dev/cpudevs.h>
  71
  72 #include <hp700/gsc/gscbusvar.h>
  73
  74 #define LPTGSC_OFFSET   0x800
  75
  76 #ifndef LPTDEBUG
  77 #define LPRINTF(a)
  78 #else
  79 #define LPRINTF(a)      if (lpt_isa_debug) printf a
  80 int lpt_isa_debug = 0;
  81 #endif
  82
  83 int     lpt_gsc_probe(device_t, cfdata_t , void *);
  84 void    lpt_gsc_attach(device_t, device_t, void *);
  85
  86 CFATTACH_DECL_NEW(lpt_gsc, sizeof(struct lpt_softc),
  87     lpt_gsc_probe, lpt_gsc_attach, NULL, NULL);
  88
  89 int     lpt_port_test(bus_space_tag_t, bus_space_handle_t, bus_addr_t,
  90             bus_size_t, u_char, u_char);
  91
  92 /*
  93  * Internal routine to lptprobe to do port tests of one byte value.
  94  */
  95 int
  96 lpt_port_test(bus_space_tag_t iot, bus_space_handle_t ioh, bus_addr_t base,
  97     bus_size_t off, u_char data, u_char mask)
  98 {
  99         int timeout;
 100         u_char temp;
 101
 102         data &= mask;
 103         bus_space_write_1(iot, ioh, off, data);
 104         timeout = 1000;
 105         do {
 106                 delay(10);
 107                 temp = bus_space_read_1(iot, ioh, off) & mask;
 108         } while (temp != data && --timeout);
 109         LPRINTF(("lpt: port=0x%x out=0x%x in=0x%x timeout=%d\n",
 110             (unsigned)(base + off), (unsigned)data, (unsigned)temp, timeout));
 111         return (temp == data);
 112 }
 113
 114 /*
 115  * Logic:
 116  *      1) You should be able to write to and read back the same value
 117  *         to the data port.  Do an alternating zeros, alternating ones,
 118  *         walking zero, and walking one test to check for stuck bits.
 119  *
 120  *      2) You should be able to write to and read back the same value
 121  *         to the control port lower 5 bits, the upper 3 bits are reserved
 122  *         per the IBM PC technical reference manauls and different boards
 123  *         do different things with them.  Do an alternating zeros, alternating
 124  *         ones, walking zero, and walking one test to check for stuck bits.
 125  *
 126  *         Some printers drag the strobe line down when the are powered off
 127  *         so this bit has been masked out of the control port test.
 128  *
 129  *         XXX Some printers may not like a fast pulse on init or strobe, I
 130  *         don't know at this point, if that becomes a problem these bits
 131  *         should be turned off in the mask byte for the control port test.
 132  *
 133  *      3) Set the data and control ports to a value of 0
 134  */
 135 int
 136 lpt_gsc_probe(device_t parent, cfdata_t match, void *aux)
 137 {
 138         struct gsc_attach_args *ga = aux;
 139         bus_space_handle_t ioh;
 140         bus_addr_t base;
 141         uint8_t mask, data;
 142         int i, rv;
 143
 144         if (ga->ga_type.iodc_type != HPPA_TYPE_FIO ||
 145             ga->ga_type.iodc_sv_model != HPPA_FIO_CENT)
 146                 return 0;
 147
 148 #ifdef DEBUG
 149 #define ABORT                                                                \
 150         do {                                                                 \
 151                 printf("lpt_gsc_probe: mask %x data %x failed\n", mask,      \
 152                     data);                                                   \
 153                 bus_space_unmap(ga->ga_iot, ioh, LPT_NPORTS);                \
 154                 return 0;                                                    \
 155         } while (0)
 156 #else
 157 #define ABORT                                                                \
 158         do {                                                                 \
 159                 bus_space_unmap(ga->ga_iot, ioh, LPT_NPORTS);                \
 160                 return 0;                                                    \
 161         } while (0)
 162 #endif
 163
 164         base = ga->ga_hpa + LPTGSC_OFFSET;
 165         if (bus_space_map(ga->ga_iot, base, LPT_NPORTS, 0, &ioh))
 166                 return 0;
 167
 168         rv = 0;
 169         mask = 0xff;
 170
 171         data = 0x55;                            /* Alternating zeros */
 172         if (!lpt_port_test(ga->ga_iot, ioh, base, lpt_data, data, mask))
 173                 ABORT;
 174
 175         data = 0xaa;                            /* Alternating ones */
 176         if (!lpt_port_test(ga->ga_iot, ioh, base, lpt_data, data, mask))
 177                 ABORT;
 178
 179         for (i = 0; i < CHAR_BIT; i++) {        /* Walking zero */
 180                 data = ~(1 << i);
 181                 if (!lpt_port_test(ga->ga_iot, ioh, base, lpt_data, data, mask))
 182                         ABORT;
 183         }
 184
 185         for (i = 0; i < CHAR_BIT; i++) {        /* Walking one */
 186                 data = (1 << i);
 187                 if (!lpt_port_test(ga->ga_iot, ioh, base, lpt_data, data, mask))
 188                         ABORT;
 189         }
 190
 191         bus_space_write_1(ga->ga_iot, ioh, lpt_data, 0);
 192         bus_space_write_1(ga->ga_iot, ioh, lpt_control, 0);
 193         bus_space_unmap(ga->ga_iot, ioh, LPT_NPORTS);
 194
 195         return 1;
 196 }
 197
 198 void
 199 lpt_gsc_attach(device_t parent, device_t self, void *aux)
 200 {
 201         struct lpt_softc *sc = device_private(self);
 202         struct gsc_attach_args *ga = aux;
 203
 204         /* sc->sc_flags |= LPT_POLLED; */
 205
 206         sc->sc_dev = self;
 207         sc->sc_state = 0;
 208         sc->sc_iot = ga->ga_iot;
 209         if (bus_space_map(sc->sc_iot, ga->ga_hpa + LPTGSC_OFFSET,
 210                           LPT_NPORTS, 0, &sc->sc_ioh)) {
 211                 aprint_error(": can't map i/o ports\n");
 212                 return;
 213         }
 214
 215         lpt_attach_subr(sc);
 216
 217         sc->sc_ih = hp700_intr_establish(sc->sc_dev, IPL_TTY,
 218                                          lptintr, sc,
 219                                          ga->ga_int_reg, ga->ga_irq);
 220         aprint_normal("\n");
 221 }