1 /* $NetBSD: tc5165buf.c,v 1.11 2002/10/02 05:26:47 thorpej 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 CFATTACH_DECL(tc5165buf, sizeof(struct tc5165buf_softc), 99 tc5165buf_match, tc5165buf_attach, NULL, NULL); 100 101 int 102 tc5165buf_match(struct device *parent, struct cfdata *cf, void *aux) 103 { 104 105 return (1); 106 } 107 108 void 109 tc5165buf_attach(struct device *parent, struct device *self, void *aux) 110 { 111 struct cs_attach_args *ca = aux; 112 struct tc5165buf_softc *sc = (void*)self; 113 struct hpckbd_attach_args haa; 114 115 printf(": "); 116 sc->sc_tc = ca->ca_tc; 117 sc->sc_chip = &tc5165buf_chip; 118 119 callout_init(&sc->sc_chip->scc_soft_ch); 120 121 sc->sc_chip->scc_cst = ca->ca_csio.cstag; 122 123 if (bus_space_map(sc->sc_chip->scc_cst, ca->ca_csio.csbase, 124 ca->ca_csio.cssize, 0, &sc->sc_chip->scc_csh)) { 125 printf("can't map i/o space\n"); 126 return; 127 } 128 129 sc->sc_chip->scc_enabled = 0; 130 131 if (ca->ca_irq1 != -1) { 132 sc->sc_ih = tx_intr_establish(sc->sc_tc, ca->ca_irq1, 133 IST_EDGE, IPL_TTY, 134 tc5165buf_intr, sc); 135 printf("interrupt mode"); 136 } else { 137 sc->sc_ih = tx39_poll_establish(sc->sc_tc, 1, IPL_TTY, 138 tc5165buf_intr, sc); 139 printf("polling mode"); 140 } 141 142 if (!sc->sc_ih) { 143 printf(" can't establish interrupt\n"); 144 return; 145 } 146 147 printf("\n"); 148 149 /* setup upper interface */ 150 tc5165buf_ifsetup(sc->sc_chip); 151 152 haa.haa_ic = &sc->sc_chip->scc_if; 153 154 config_found(self, &haa, hpckbd_print); 155 } 156 157 void 158 tc5165buf_ifsetup(struct tc5165buf_chip *scc) 159 { 160 161 scc->scc_if.hii_ctx = scc; 162 scc->scc_if.hii_establish = tc5165buf_input_establish; 163 scc->scc_if.hii_poll = tc5165buf_poll; 164 } 165 166 int 167 tc5165buf_cnattach(paddr_t addr) 168 { 169 struct tc5165buf_chip *scc = &tc5165buf_chip; 170 171 scc->scc_csh = MIPS_PHYS_TO_KSEG1(addr); 172 173 tc5165buf_ifsetup(scc); 174 175 hpckbd_cnattach(&scc->scc_if); 176 177 return (0); 178 } 179 180 int 181 tc5165buf_input_establish(void *ic, struct hpckbd_if *kbdif) 182 { 183 struct tc5165buf_chip *scc = ic; 184 185 /* save hpckbd interface */ 186 scc->scc_hpckbd = kbdif; 187 188 scc->scc_enabled = 1; 189 190 return (0); 191 } 192 193 int 194 tc5165buf_intr(void *arg) 195 { 196 struct tc5165buf_softc *sc = arg; 197 struct tc5165buf_chip *scc = sc->sc_chip; 198 199 if (!scc->scc_enabled || scc->scc_queued) 200 return (0); 201 202 scc->scc_queued = 1; 203 callout_reset(&scc->scc_soft_ch, 1, tc5165buf_soft, scc); 204 205 return (0); 206 } 207 208 int 209 tc5165buf_poll(void *arg) 210 { 211 struct tc5165buf_chip *scc = arg; 212 213 if (!scc->scc_enabled) 214 return (POLL_CONT); 215 216 tc5165buf_soft(arg); 217 218 return (POLL_CONT); 219 } 220 221 void 222 tc5165buf_soft(void *arg) 223 { 224 struct tc5165buf_chip *scc = arg; 225 bus_space_tag_t t = scc->scc_cst; 226 bus_space_handle_t h = scc->scc_csh; 227 u_int16_t mask, rpat, edge; 228 int i, j, type, val; 229 int s; 230 231 hpckbd_input_hook(scc->scc_hpckbd); 232 233 /* clear scanlines */ 234 (void)bus_space_read_2(t, h, 0); 235 delay(3); 236 237 for (i = 0; i < TC5165_COLUMN_MAX; i++) { 238 rpat = bus_space_read_2(t, h, 2 << i); 239 delay(3); 240 (void)bus_space_read_2(t, h, 0); 241 delay(3); 242 if ((edge = (rpat ^ scc->scc_buf[i]))) { 243 scc->scc_buf[i] = rpat; 244 for (j = 0, mask = 1; j < TC5165_ROW_MAX; 245 j++, mask <<= 1) { 246 if (mask & edge) { 247 type = mask & rpat ? 1 : 0; 248 val = j * TC5165_COLUMN_MAX + i; 249 DPRINTF(("%d %d\n", j, i)); 250 hpckbd_input(scc->scc_hpckbd, 251 type, val); 252 } 253 } 254 } 255 } 256 257 s = spltty(); 258 scc->scc_queued = 0; 259 splx(s); 260 } 261