1 /* $NetBSD: m38813c.c,v 1.12 2008/04/28 20:23:21 martin 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Device driver for MITUBISHI M38813 controller 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: m38813c.c,v 1.12 2008/04/28 20:23:21 martin Exp $"); 38 39 #include "opt_use_poll.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/device.h> 44 45 #include <machine/bus.h> 46 #include <machine/intr.h> 47 48 #include <dev/hpc/hpckbdvar.h> 49 50 #include <hpcmips/tx/tx39var.h> 51 #include <hpcmips/tx/txcsbusvar.h> 52 #include <hpcmips/dev/m38813cvar.h> 53 54 struct m38813c_chip { 55 bus_space_tag_t scc_cst; 56 bus_space_handle_t scc_csh; 57 int scc_enabled; 58 int t_lastchar; 59 int t_extended; 60 int t_extended1; 61 62 struct hpckbd_ic_if scc_if; 63 struct hpckbd_if *scc_hpckbd; 64 }; 65 66 struct m38813c_softc { 67 struct device sc_dev; 68 struct m38813c_chip *sc_chip; 69 tx_chipset_tag_t sc_tc; 70 void *sc_ih; 71 }; 72 73 int m38813c_match(struct device *, struct cfdata *, void *); 74 void m38813c_attach(struct device *, struct device *, void *); 75 int m38813c_intr(void *); 76 int m38813c_poll(void *); 77 void m38813c_ifsetup(struct m38813c_chip *); 78 int m38813c_input_establish(void *, struct hpckbd_if *); 79 80 struct m38813c_chip m38813c_chip; 81 82 CFATTACH_DECL(m38813c, sizeof(struct m38813c_softc), 83 m38813c_match, m38813c_attach, NULL, NULL); 84 85 int 86 m38813c_match(struct device *parent, struct cfdata *cf, void *aux) 87 { 88 89 return (1); 90 } 91 92 void 93 m38813c_attach(struct device *parent, struct device *self, void *aux) 94 { 95 struct cs_attach_args *ca = aux; 96 struct m38813c_softc *sc = (void*)self; 97 struct hpckbd_attach_args haa; 98 99 sc->sc_tc = ca->ca_tc; 100 sc->sc_chip = &m38813c_chip; 101 sc->sc_chip->scc_cst = ca->ca_csio.cstag; 102 103 if (bus_space_map(sc->sc_chip->scc_cst, ca->ca_csio.csbase, 104 ca->ca_csio.cssize, 0, &sc->sc_chip->scc_csh)) { 105 printf(": can't map i/o space\n"); 106 } 107 108 #ifndef USE_POLL 109 #error options USE_POLL required. 110 #endif 111 if (!(sc->sc_ih = tx39_poll_establish(sc->sc_tc, 1, 112 IPL_TTY, m38813c_intr, 113 sc))) { 114 printf(": can't establish interrupt\n"); 115 } 116 117 printf("\n"); 118 119 /* setup upper interface */ 120 m38813c_ifsetup(sc->sc_chip); 121 122 haa.haa_ic = &sc->sc_chip->scc_if; 123 124 config_found(self, &haa, hpckbd_print); 125 } 126 127 void 128 m38813c_ifsetup(struct m38813c_chip *scc) 129 { 130 131 scc->scc_if.hii_ctx = scc; 132 133 scc->scc_if.hii_establish = m38813c_input_establish; 134 scc->scc_if.hii_poll = m38813c_intr; 135 } 136 137 int 138 m38813c_cnattach(paddr_t addr) 139 { 140 struct m38813c_chip *scc = &m38813c_chip; 141 142 scc->scc_csh = MIPS_PHYS_TO_KSEG1(addr); 143 144 m38813c_ifsetup(scc); 145 146 hpckbd_cnattach(&scc->scc_if); 147 148 return (0); 149 } 150 151 int 152 m38813c_input_establish(void *ic, struct hpckbd_if *kbdif) 153 { 154 struct m38813c_chip *scc = ic; 155 156 /* save lower interface */ 157 scc->scc_hpckbd = kbdif; 158 159 scc->scc_enabled = 1; 160 161 return (0); 162 } 163 164 #define KBR_EXTENDED0 0xE0 /* extended key sequence */ 165 #define KBR_EXTENDED1 0xE1 /* extended key sequence */ 166 167 int 168 m38813c_intr(void *arg) 169 { 170 struct m38813c_softc *sc = arg; 171 172 return (m38813c_poll(sc->sc_chip)); 173 } 174 175 int 176 m38813c_poll(void *arg) 177 { 178 struct m38813c_chip *scc = arg; 179 bus_space_tag_t t = scc->scc_cst; 180 bus_space_handle_t h = scc->scc_csh; 181 int datain, type, key; 182 183 if (!scc->scc_enabled) { 184 return (0); 185 } 186 187 datain= bus_space_read_1(t, h, 0); 188 189 hpckbd_input_hook(scc->scc_hpckbd); 190 191 if (datain == KBR_EXTENDED0) { 192 scc->t_extended = 1; 193 return (0); 194 } else if (datain == KBR_EXTENDED1) { 195 scc->t_extended1 = 2; 196 return (0); 197 } 198 199 /* map extended keys to (unused) codes 128-254 */ 200 key = (datain & 0x7f) | (scc->t_extended ? 0x80 : 0); 201 scc->t_extended = 0; 202 203 /* 204 * process BREAK key (EXT1 1D 45 EXT1 9D C5): 205 * map to (unused) code 7F 206 */ 207 if (scc->t_extended1 == 2 && (datain == 0x1d || datain == 0x9d)) { 208 scc->t_extended1 = 1; 209 return (0); 210 } else if (scc->t_extended1 == 1 && 211 (datain == 0x45 || datain == 0xc5)) { 212 scc->t_extended1 = 0; 213 key = 0x7f; 214 } else if (scc->t_extended1 > 0) { 215 scc->t_extended1 = 0; 216 } 217 218 if (datain & 0x80) { 219 scc->t_lastchar = 0; 220 type = 0; 221 } else { 222 /* Always ignore typematic keys */ 223 if (key == scc->t_lastchar) 224 return 0; 225 scc->t_lastchar = key; 226 type = 1; 227 } 228 229 hpckbd_input(scc->scc_hpckbd, type, key); 230 231 return (0); 232 } 233