1 /* $NetBSD: tc5165buf.c,v 1.5 2000/03/23 06:38:02 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1999, 2000, by UCHIYAMA Yasushi 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. The name of the developer may NOT be used to endorse or promote products 13 * derived from this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 */ 28 29 /* 30 * Device driver for TOSHIBA TC5165BFTS, PHILIPS 74ALVC16241/245 31 * buffer chip 32 */ 33 34 #include "opt_tx39_debug.h" 35 #include "opt_use_poll.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/callout.h> 40 #include <sys/device.h> 41 42 #include <machine/bus.h> 43 #include <machine/intr.h> 44 45 #include <hpcmips/tx/tx39var.h> 46 #include <hpcmips/tx/txcsbusvar.h> 47 48 #include <hpcmips/dev/tc5165bufvar.h> 49 #include <hpcmips/dev/skbdvar.h> 50 51 #define TC5165_ROW_MAX 16 52 #define TC5165_COLUMN_MAX 8 53 54 #ifdef TC5165DEBUG 55 #define DPRINTF(arg) printf arg 56 #else 57 #define DPRINTF(arg) 58 #endif 59 60 struct tc5165buf_chip { 61 bus_space_tag_t scc_cst; 62 bus_space_handle_t scc_csh; 63 u_int16_t scc_buf[TC5165_COLUMN_MAX]; 64 int scc_enabled; 65 int scc_queued; 66 struct callout scc_soft_ch; 67 68 struct skbd_controller scc_controller; 69 }; 70 71 struct tc5165buf_softc { 72 struct device sc_dev; 73 struct tc5165buf_chip *sc_chip; 74 tx_chipset_tag_t sc_tc; 75 void *sc_ih; 76 }; 77 78 int tc5165buf_match __P((struct device*, struct cfdata*, void*)); 79 void tc5165buf_attach __P((struct device*, struct device*, void*)); 80 int tc5165buf_intr __P((void*)); 81 int tc5165buf_poll __P((void*)); 82 void tc5165buf_soft __P((void*)); 83 void tc5165buf_ifsetup __P((struct tc5165buf_chip*)); 84 85 int tc5165buf_input_establish __P((void*, int (*) __P((void*, int, int)), 86 void (*) __P((void*)), void*)); 87 88 struct tc5165buf_chip tc5165buf_chip; 89 90 struct cfattach tc5165buf_ca = { 91 sizeof(struct tc5165buf_softc), tc5165buf_match, tc5165buf_attach 92 }; 93 94 int 95 tc5165buf_match(parent, cf, aux) 96 struct device *parent; 97 struct cfdata *cf; 98 void *aux; 99 { 100 return 1; 101 } 102 103 void 104 tc5165buf_attach(parent, self, aux) 105 struct device *parent; 106 struct device *self; 107 void *aux; 108 { 109 struct cs_attach_args *ca = aux; 110 struct tc5165buf_softc *sc = (void*)self; 111 struct skbd_attach_args saa; 112 113 printf(": "); 114 sc->sc_tc = ca->ca_tc; 115 sc->sc_chip = &tc5165buf_chip; 116 117 callout_init(&sc->sc_chip->scc_soft_ch); 118 119 sc->sc_chip->scc_cst = ca->ca_csio.cstag; 120 121 if (bus_space_map(sc->sc_chip->scc_cst, ca->ca_csio.csbase, 122 ca->ca_csio.cssize, 0, &sc->sc_chip->scc_csh)) { 123 printf("can't map i/o space\n"); 124 return; 125 } 126 127 sc->sc_chip->scc_enabled = 0; 128 129 if (ca->ca_irq1 != -1) { 130 sc->sc_ih = tx_intr_establish(sc->sc_tc, ca->ca_irq1, 131 IST_EDGE, IPL_TTY, 132 tc5165buf_intr, sc); 133 printf("interrupt mode"); 134 } else { 135 sc->sc_ih = tx39_poll_establish(sc->sc_tc, 1, IPL_TTY, 136 tc5165buf_intr, sc); 137 printf("polling mode"); 138 } 139 140 if (!sc->sc_ih) { 141 printf(" can't establish interrupt\n"); 142 return; 143 } 144 145 printf("\n"); 146 147 /* setup upper interface */ 148 tc5165buf_ifsetup(sc->sc_chip); 149 150 saa.saa_ic = &sc->sc_chip->scc_controller; 151 152 config_found(self, &saa, skbd_print); 153 } 154 155 void 156 tc5165buf_ifsetup(scc) 157 struct tc5165buf_chip *scc; 158 { 159 scc->scc_controller.skif_v = scc; 160 161 scc->scc_controller.skif_establish = tc5165buf_input_establish; 162 scc->scc_controller.skif_poll = tc5165buf_poll; 163 } 164 165 int 166 tc5165buf_cnattach(addr) 167 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 skbd_cnattach(&scc->scc_controller); 176 177 return 0; 178 } 179 180 int 181 tc5165buf_input_establish(ic, inputfunc, inputhookfunc, arg) 182 void *ic; 183 int (*inputfunc) __P((void*, int, int)); 184 void (*inputhookfunc) __P((void*)); 185 void *arg; 186 { 187 struct tc5165buf_chip *scc = ic; 188 189 /* setup lower interface */ 190 191 scc->scc_controller.sk_v = arg; 192 193 scc->scc_controller.sk_input = inputfunc; 194 scc->scc_controller.sk_input_hook = inputhookfunc; 195 196 scc->scc_enabled = 1; 197 198 return 0; 199 } 200 201 int 202 tc5165buf_intr(arg) 203 void *arg; 204 { 205 struct tc5165buf_softc *sc = arg; 206 struct tc5165buf_chip *scc = sc->sc_chip; 207 208 if (!scc->scc_enabled || scc->scc_queued) 209 return 0; 210 211 scc->scc_queued = 1; 212 callout_reset(&scc->scc_soft_ch, 1, tc5165buf_soft, scc); 213 214 return 0; 215 } 216 217 int 218 tc5165buf_poll(arg) 219 void *arg; 220 { 221 struct tc5165buf_chip *scc = arg; 222 223 if (!scc->scc_enabled) 224 return POLL_CONT; 225 226 tc5165buf_soft(arg); 227 228 return POLL_CONT; 229 } 230 231 void 232 tc5165buf_soft(arg) 233 void *arg; 234 { 235 struct tc5165buf_chip *scc = arg; 236 bus_space_tag_t t = scc->scc_cst; 237 bus_space_handle_t h = scc->scc_csh; 238 u_int16_t mask, rpat, edge; 239 int i, j, type, val; 240 skbd_tag_t controller; 241 int s; 242 243 controller = &scc->scc_controller; 244 skbd_input_hook(controller); 245 246 /* clear scanlines */ 247 (void)bus_space_read_2(t, h, 0); 248 delay(3); 249 250 for (i = 0; i < TC5165_COLUMN_MAX; i++) { 251 rpat = bus_space_read_2(t, h, 2 << i); 252 delay(3); 253 (void)bus_space_read_2(t, h, 0); 254 delay(3); 255 if ((edge = (rpat ^ scc->scc_buf[i]))) { 256 scc->scc_buf[i] = rpat; 257 for (j = 0, mask = 1; j < TC5165_ROW_MAX; 258 j++, mask <<= 1) { 259 if (mask & edge) { 260 type = mask & rpat ? 1 : 0; 261 val = j * TC5165_COLUMN_MAX + i; 262 DPRINTF(("%d %d\n", j, i)); 263 skbd_input(controller, type, val); 264 } 265 } 266 } 267 } 268 269 s = spltty(); 270 scc->scc_queued = 0; 271 splx(s); 272 } 273