1 /* $NetBSD: tc5165buf.c,v 1.9 2002/01/29 18:53:12 uch Exp $ */ 2 3 /*- 4 * Copyright (c) 1999-2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by UCHIYAMA Yasushi. 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 for TOSHIBA TC5165BFTS, PHILIPS 74ALVC16241/245 41 * buffer chip 42 */ 43 44 #include "opt_use_poll.h" 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/callout.h> 49 #include <sys/device.h> 50 51 #include <machine/bus.h> 52 #include <machine/intr.h> 53 54 #include <dev/hpc/hpckbdvar.h> 55 56 #include <hpcmips/tx/tx39var.h> 57 #include <hpcmips/tx/txcsbusvar.h> 58 #include <hpcmips/dev/tc5165bufvar.h> 59 60 #define TC5165_ROW_MAX 16 61 #define TC5165_COLUMN_MAX 8 62 63 #ifdef TC5165DEBUG 64 #define DPRINTF(arg) printf arg 65 #else 66 #define DPRINTF(arg) 67 #endif 68 69 struct tc5165buf_chip { 70 bus_space_tag_t scc_cst; 71 bus_space_handle_t scc_csh; 72 u_int16_t scc_buf[TC5165_COLUMN_MAX]; 73 int scc_enabled; 74 int scc_queued; 75 struct callout scc_soft_ch; 76 struct hpckbd_ic_if scc_if; 77 struct hpckbd_if *scc_hpckbd; 78 }; 79 80 struct tc5165buf_softc { 81 struct device sc_dev; 82 struct tc5165buf_chip *sc_chip; 83 tx_chipset_tag_t sc_tc; 84 void *sc_ih; 85 }; 86 87 int tc5165buf_match(struct device *, struct cfdata *, void *); 88 void tc5165buf_attach(struct device *, struct device *, void *); 89 int tc5165buf_intr(void *); 90 int tc5165buf_poll(void *); 91 void tc5165buf_soft(void *); 92 void tc5165buf_ifsetup(struct tc5165buf_chip *); 93 94 int tc5165buf_input_establish(void *, struct hpckbd_if *); 95 96 struct tc5165buf_chip tc5165buf_chip; 97 98 struct cfattach tc5165buf_ca = { 99 sizeof(struct tc5165buf_softc), tc5165buf_match, tc5165buf_attach 100 }; 101 102 int 103 tc5165buf_match(struct device *parent, struct cfdata *cf, void *aux) 104 { 105 106 return (1); 107 } 108 109 void 110 tc5165buf_attach(struct device *parent, struct device *self, void *aux) 111 { 112 struct cs_attach_args *ca = aux; 113 struct tc5165buf_softc *sc = (void*)self; 114 struct hpckbd_attach_args haa; 115 116 printf(": "); 117 sc->sc_tc = ca->ca_tc; 118 sc->sc_chip = &tc5165buf_chip; 119 120 callout_init(&sc->sc_chip->scc_soft_ch); 121 122 sc->sc_chip->scc_cst = ca->ca_csio.cstag; 123 124 if (bus_space_map(sc->sc_chip->scc_cst, ca->ca_csio.csbase, 125 ca->ca_csio.cssize, 0, &sc->sc_chip->scc_csh)) { 126 printf("can't map i/o space\n"); 127 return; 128 } 129 130 sc->sc_chip->scc_enabled = 0; 131 132 if (ca->ca_irq1 != -1) { 133 sc->sc_ih = tx_intr_establish(sc->sc_tc, ca->ca_irq1, 134 IST_EDGE, IPL_TTY, 135 tc5165buf_intr, sc); 136 printf("interrupt mode"); 137 } else { 138 sc->sc_ih = tx39_poll_establish(sc->sc_tc, 1, IPL_TTY, 139 tc5165buf_intr, sc); 140 printf("polling mode"); 141 } 142 143 if (!sc->sc_ih) { 144 printf(" can't establish interrupt\n"); 145 return; 146 } 147 148 printf("\n"); 149 150 /* setup upper interface */ 151 tc5165buf_ifsetup(sc->sc_chip); 152 153 haa.haa_ic = &sc->sc_chip->scc_if; 154 155 config_found(self, &haa, hpckbd_print); 156 } 157 158 void 159 tc5165buf_ifsetup(struct tc5165buf_chip *scc) 160 { 161 162 scc->scc_if.hii_ctx = scc; 163 scc->scc_if.hii_establish = tc5165buf_input_establish; 164 scc->scc_if.hii_poll = tc5165buf_poll; 165 } 166 167 int 168 tc5165buf_cnattach(paddr_t addr) 169 { 170 struct tc5165buf_chip *scc = &tc5165buf_chip; 171 172 scc->scc_csh = MIPS_PHYS_TO_KSEG1(addr); 173 174 tc5165buf_ifsetup(scc); 175 176 hpckbd_cnattach(&scc->scc_if); 177 178 return (0); 179 } 180 181 int 182 tc5165buf_input_establish(void *ic, struct hpckbd_if *kbdif) 183 { 184 struct tc5165buf_chip *scc = ic; 185 186 /* save hpckbd interface */ 187 scc->scc_hpckbd = kbdif; 188 189 scc->scc_enabled = 1; 190 191 return (0); 192 } 193 194 int 195 tc5165buf_intr(void *arg) 196 { 197 struct tc5165buf_softc *sc = arg; 198 struct tc5165buf_chip *scc = sc->sc_chip; 199 200 if (!scc->scc_enabled || scc->scc_queued) 201 return (0); 202 203 scc->scc_queued = 1; 204 callout_reset(&scc->scc_soft_ch, 1, tc5165buf_soft, scc); 205 206 return (0); 207 } 208 209 int 210 tc5165buf_poll(void *arg) 211 { 212 struct tc5165buf_chip *scc = arg; 213 214 if (!scc->scc_enabled) 215 return (POLL_CONT); 216 217 tc5165buf_soft(arg); 218 219 return (POLL_CONT); 220 } 221 222 void 223 tc5165buf_soft(void *arg) 224 { 225 struct tc5165buf_chip *scc = arg; 226 bus_space_tag_t t = scc->scc_cst; 227 bus_space_handle_t h = scc->scc_csh; 228 u_int16_t mask, rpat, edge; 229 int i, j, type, val; 230 int s; 231 232 hpckbd_input_hook(scc->scc_hpckbd); 233 234 /* clear scanlines */ 235 (void)bus_space_read_2(t, h, 0); 236 delay(3); 237 238 for (i = 0; i < TC5165_COLUMN_MAX; i++) { 239 rpat = bus_space_read_2(t, h, 2 << i); 240 delay(3); 241 (void)bus_space_read_2(t, h, 0); 242 delay(3); 243 if ((edge = (rpat ^ scc->scc_buf[i]))) { 244 scc->scc_buf[i] = rpat; 245 for (j = 0, mask = 1; j < TC5165_ROW_MAX; 246 j++, mask <<= 1) { 247 if (mask & edge) { 248 type = mask & rpat ? 1 : 0; 249 val = j * TC5165_COLUMN_MAX + i; 250 DPRINTF(("%d %d\n", j, i)); 251 hpckbd_input(scc->scc_hpckbd, 252 type, val); 253 } 254 } 255 } 256 } 257 258 s = spltty(); 259 scc->scc_queued = 0; 260 splx(s); 261 } 262