lpt_pcc.c revision 1.7
1 /* $NetBSD: lpt_pcc.c,v 1.7 2002/10/02 05:28:13 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Steve C. Woodford. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Device Driver back-end for the MVME147's parallel printer port 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/device.h> 47 #include <sys/syslog.h> 48 49 #include <machine/bus.h> 50 51 #include <dev/mvme/lptvar.h> 52 53 #include <mvme68k/dev/lpt_pccreg.h> 54 #include <mvme68k/dev/pccreg.h> 55 #include <mvme68k/dev/pccvar.h> 56 57 58 59 static int lpt_pcc_intr __P((void *)); 60 static void lpt_pcc_open __P((struct lpt_softc *, int)); 61 static void lpt_pcc_close __P((struct lpt_softc *)); 62 static void lpt_pcc_iprime __P((struct lpt_softc *)); 63 static void lpt_pcc_speed __P((struct lpt_softc *, int)); 64 static int lpt_pcc_notrdy __P((struct lpt_softc *, int)); 65 static void lpt_pcc_wr_data __P((struct lpt_softc *, u_char)); 66 67 struct lpt_funcs lpt_pcc_funcs = { 68 lpt_pcc_open, 69 lpt_pcc_close, 70 lpt_pcc_iprime, 71 lpt_pcc_speed, 72 lpt_pcc_notrdy, 73 lpt_pcc_wr_data 74 }; 75 76 /* 77 * Autoconfig stuff 78 */ 79 static int lpt_pcc_match __P((struct device *, struct cfdata *, void *)); 80 static void lpt_pcc_attach __P((struct device *, struct device *, void *)); 81 82 CFATTACH_DECL(lpt_pcc, sizeof(struct lpt_softc), 83 lpt_pcc_match, lpt_pcc_attach, NULL, NULL); 84 85 extern struct cfdriver lpt_cd; 86 87 88 /*ARGSUSED*/ 89 static int 90 lpt_pcc_match(parent, cf, args) 91 struct device *parent; 92 struct cfdata *cf; 93 void *args; 94 { 95 struct pcc_attach_args *pa; 96 97 pa = args; 98 99 if (strcmp(pa->pa_name, lpt_cd.cd_name)) 100 return (0); 101 102 pa->pa_ipl = cf->pcccf_ipl; 103 return (1); 104 } 105 106 /*ARGSUSED*/ 107 static void 108 lpt_pcc_attach(parent, self, args) 109 struct device *parent, *self; 110 void *args; 111 { 112 struct lpt_softc *sc; 113 struct pcc_attach_args *pa; 114 115 sc = (struct lpt_softc *) self; 116 pa = args; 117 118 sc->sc_bust = pa->pa_bust; 119 bus_space_map(pa->pa_bust, pa->pa_offset, LPREG_SIZE, 0, &sc->sc_bush); 120 121 sc->sc_ipl = pa->pa_ipl & PCC_IMASK; 122 sc->sc_funcs = &lpt_pcc_funcs; 123 sc->sc_laststatus = 0; 124 125 printf(": PCC Parallel Printer\n"); 126 127 /* 128 * Disable interrupts until device is opened 129 */ 130 pcc_reg_write(sys_pcc, PCCREG_PRNT_INTR_CTRL, 0); 131 132 /* 133 * Main attachment code 134 */ 135 lpt_attach_subr(sc); 136 137 /* Register the event counter */ 138 evcnt_attach_dynamic(&sc->sc_evcnt, EVCNT_TYPE_INTR, 139 pccintr_evcnt(sc->sc_ipl), "printer", sc->sc_dev.dv_xname); 140 141 /* 142 * Hook into the printer interrupt 143 */ 144 pccintr_establish(PCCV_PRINTER, lpt_pcc_intr, sc->sc_ipl, sc, 145 &sc->sc_evcnt); 146 } 147 148 /* 149 * Handle printer interrupts which occur when the printer is ready to accept 150 * another char. 151 */ 152 int 153 lpt_pcc_intr(arg) 154 void *arg; 155 { 156 struct lpt_softc *sc; 157 int i; 158 159 sc = arg; 160 161 /* is printer online and ready for output */ 162 if (lpt_pcc_notrdy(sc, 0) && lpt_pcc_notrdy(sc, 1)) 163 return 0; 164 165 i = lpt_intr(sc); 166 167 if (pcc_reg_read(sys_pcc, PCCREG_PRNT_INTR_CTRL) & LPI_ACKINT) { 168 pcc_reg_write(sys_pcc, PCCREG_PRNT_INTR_CTRL, 169 sc->sc_icr | LPI_ACKINT); 170 } 171 172 return (i); 173 } 174 175 176 static void 177 lpt_pcc_open(sc, int_ena) 178 struct lpt_softc *sc; 179 int int_ena; 180 { 181 int sps; 182 183 pcc_reg_write(sys_pcc, PCCREG_PRNT_INTR_CTRL, 184 LPI_ACKINT | LPI_FAULTINT); 185 186 if (int_ena == 0) { 187 sps = splhigh(); 188 sc->sc_icr = sc->sc_ipl | LPI_ENABLE; 189 pcc_reg_write(sys_pcc, PCCREG_PRNT_INTR_CTRL, sc->sc_icr); 190 splx(sps); 191 } 192 } 193 194 static void 195 lpt_pcc_close(sc) 196 struct lpt_softc *sc; 197 { 198 199 pcc_reg_write(sys_pcc, PCCREG_PRNT_INTR_CTRL, 0); 200 sc->sc_icr = sc->sc_ipl; 201 pcc_reg_write(sys_pcc, PCCREG_PRNT_INTR_CTRL, sc->sc_icr); 202 } 203 204 /* ARGSUSED */ 205 static void 206 lpt_pcc_iprime(sc) 207 struct lpt_softc *sc; 208 { 209 210 lpt_control_write(LPC_INPUT_PRIME); 211 delay(100); 212 } 213 214 /* ARGSUSED */ 215 static void 216 lpt_pcc_speed(sc, speed) 217 struct lpt_softc *sc; 218 int speed; 219 { 220 221 if (speed == LPT_STROBE_FAST) 222 lpt_control_write(LPC_FAST_STROBE); 223 else 224 lpt_control_write(0); 225 } 226 227 static int 228 lpt_pcc_notrdy(sc, err) 229 struct lpt_softc *sc; 230 int err; 231 { 232 u_char status; 233 u_char new; 234 235 #define LPS_INVERT (LPS_SELECT) 236 #define LPS_MASK (LPS_SELECT|LPS_FAULT|LPS_BUSY|LPS_PAPER_EMPTY) 237 238 status = (lpt_status_read(sc) ^ LPS_INVERT) & LPS_MASK; 239 240 if (err) { 241 new = status & ~sc->sc_laststatus; 242 sc->sc_laststatus = status; 243 244 if (new & LPS_SELECT) 245 log(LOG_NOTICE, "%s: offline\n", 246 sc->sc_dev.dv_xname); 247 else if (new & LPS_PAPER_EMPTY) 248 log(LOG_NOTICE, "%s: out of paper\n", 249 sc->sc_dev.dv_xname); 250 else if (new & LPS_FAULT) 251 log(LOG_NOTICE, "%s: output error\n", 252 sc->sc_dev.dv_xname); 253 } 254 255 pcc_reg_write(sys_pcc, PCCREG_PRNT_INTR_CTRL, 256 sc->sc_icr | LPI_FAULTINT); 257 258 return (status); 259 } 260 261 static void 262 lpt_pcc_wr_data(sc, data) 263 struct lpt_softc *sc; 264 u_char data; 265 { 266 267 lpt_data_write(sc, data); 268 } 269
Indexes created Fri Sep 26 20:09:58 GMT 2025