1 /* $NetBSD: tc5165buf.c,v 1.13 2005/12/11 12:17:33 christos 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 <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: tc5165buf.c,v 1.13 2005/12/11 12:17:33 christos Exp $"); 46 47 #include "opt_use_poll.h" 48 49 #include <sys/param.h> 50 #include <sys/systm.h> 51 #include <sys/callout.h> 52 #include <sys/device.h> 53 54 #include <machine/bus.h> 55 #include <machine/intr.h> 56 57 #include <dev/hpc/hpckbdvar.h> 58 59 #include <hpcmips/tx/tx39var.h> 60 #include <hpcmips/tx/txcsbusvar.h> 61 #include <hpcmips/dev/tc5165bufvar.h> 62 63 #define TC5165_ROW_MAX 16 64 #define TC5165_COLUMN_MAX 8 65 66 #ifdef TC5165DEBUG 67 #define DPRINTF(arg) printf arg 68 #else 69 #define DPRINTF(arg) 70 #endif 71 72 struct tc5165buf_chip { 73 bus_space_tag_t scc_cst; 74 bus_space_handle_t scc_csh; 75 u_int16_t scc_buf[TC5165_COLUMN_MAX]; 76 int scc_enabled; 77 int scc_queued; 78 struct callout scc_soft_ch; 79 struct hpckbd_ic_if scc_if; 80 struct hpckbd_if *scc_hpckbd; 81 }; 82 83 struct tc5165buf_softc { 84 struct device sc_dev; 85 struct tc5165buf_chip *sc_chip; 86 tx_chipset_tag_t sc_tc; 87 void *sc_ih; 88 }; 89 90 int tc5165buf_match(struct device *, struct cfdata *, void *); 91 void tc5165buf_attach(struct device *, struct device *, void *); 92 int tc5165buf_intr(void *); 93 int tc5165buf_poll(void *); 94 void tc5165buf_soft(void *); 95 void tc5165buf_ifsetup(struct tc5165buf_chip *); 96 97 int tc5165buf_input_establish(void *, struct hpckbd_if *); 98 99 struct tc5165buf_chip tc5165buf_chip; 100 101 CFATTACH_DECL(tc5165buf, sizeof(struct tc5165buf_softc), 102 tc5165buf_match, tc5165buf_attach, NULL, NULL); 103 104 int 105 tc5165buf_match(struct device *parent, struct cfdata *cf, void *aux) 106 { 107 108 return (1); 109 } 110 111 void 112 tc5165buf_attach(struct device *parent, struct device *self, void *aux) 113 { 114 struct cs_attach_args *ca = aux; 115 struct tc5165buf_softc *sc = (void*)self; 116 struct hpckbd_attach_args haa; 117 118 printf(": "); 119 sc->sc_tc = ca->ca_tc; 120 sc->sc_chip = &tc5165buf_chip; 121 122 callout_init(&sc->sc_chip->scc_soft_ch); 123 124 sc->sc_chip->scc_cst = ca->ca_csio.cstag; 125 126 if (bus_space_map(sc->sc_chip->scc_cst, ca->ca_csio.csbase, 127 ca->ca_csio.cssize, 0, &sc->sc_chip->scc_csh)) { 128 printf("can't map i/o space\n"); 129 return; 130 } 131 132 sc->sc_chip->scc_enabled = 0; 133 134 if (ca->ca_irq1 != -1) { 135 sc->sc_ih = tx_intr_establish(sc->sc_tc, ca->ca_irq1, 136 IST_EDGE, IPL_TTY, 137 tc5165buf_intr, sc); 138 printf("interrupt mode"); 139 } else { 140 sc->sc_ih = tx39_poll_establish(sc->sc_tc, 1, IPL_TTY, 141 tc5165buf_intr, sc); 142 printf("polling mode"); 143 } 144 145 if (!sc->sc_ih) { 146 printf(" can't establish interrupt\n"); 147 return; 148 } 149 150 printf("\n"); 151 152 /* setup upper interface */ 153 tc5165buf_ifsetup(sc->sc_chip); 154 155 haa.haa_ic = &sc->sc_chip->scc_if; 156 157 config_found(self, &haa, hpckbd_print); 158 } 159 160 void 161 tc5165buf_ifsetup(struct tc5165buf_chip *scc) 162 { 163 164 scc->scc_if.hii_ctx = scc; 165 scc->scc_if.hii_establish = tc5165buf_input_establish; 166 scc->scc_if.hii_poll = tc5165buf_poll; 167 } 168 169 int 170 tc5165buf_cnattach(paddr_t addr) 171 { 172 struct tc5165buf_chip *scc = &tc5165buf_chip; 173 174 scc->scc_csh = MIPS_PHYS_TO_KSEG1(addr); 175 176 tc5165buf_ifsetup(scc); 177 178 hpckbd_cnattach(&scc->scc_if); 179 180 return (0); 181 } 182 183 int 184 tc5165buf_input_establish(void *ic, struct hpckbd_if *kbdif) 185 { 186 struct tc5165buf_chip *scc = ic; 187 188 /* save hpckbd interface */ 189 scc->scc_hpckbd = kbdif; 190 191 scc->scc_enabled = 1; 192 193 return (0); 194 } 195 196 int 197 tc5165buf_intr(void *arg) 198 { 199 struct tc5165buf_softc *sc = arg; 200 struct tc5165buf_chip *scc = sc->sc_chip; 201 202 if (!scc->scc_enabled || scc->scc_queued) 203 return (0); 204 205 scc->scc_queued = 1; 206 callout_reset(&scc->scc_soft_ch, 1, tc5165buf_soft, scc); 207 208 return (0); 209 } 210 211 int 212 tc5165buf_poll(void *arg) 213 { 214 struct tc5165buf_chip *scc = arg; 215 216 if (!scc->scc_enabled) 217 return (POLL_CONT); 218 219 tc5165buf_soft(arg); 220 221 return (POLL_CONT); 222 } 223 224 void 225 tc5165buf_soft(void *arg) 226 { 227 struct tc5165buf_chip *scc = arg; 228 bus_space_tag_t t = scc->scc_cst; 229 bus_space_handle_t h = scc->scc_csh; 230 u_int16_t mask, rpat, edge; 231 int i, j, type, val; 232 int s; 233 234 hpckbd_input_hook(scc->scc_hpckbd); 235 236 /* clear scanlines */ 237 (void)bus_space_read_2(t, h, 0); 238 delay(3); 239 240 for (i = 0; i < TC5165_COLUMN_MAX; i++) { 241 rpat = bus_space_read_2(t, h, 2 << i); 242 delay(3); 243 (void)bus_space_read_2(t, h, 0); 244 delay(3); 245 if ((edge = (rpat ^ scc->scc_buf[i]))) { 246 scc->scc_buf[i] = rpat; 247 for (j = 0, mask = 1; j < TC5165_ROW_MAX; 248 j++, mask <<= 1) { 249 if (mask & edge) { 250 type = mask & rpat ? 1 : 0; 251 val = j * TC5165_COLUMN_MAX + i; 252 DPRINTF(("%d %d\n", j, i)); 253 hpckbd_input(scc->scc_hpckbd, 254 type, val); 255 } 256 } 257 } 258 } 259 260 s = spltty(); 261 scc->scc_queued = 0; 262 splx(s); 263 } 264