1 /* $NetBSD: m38813c.c,v 1.13 2012/10/27 17:17:52 chs 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 1.13 2012/10/27 17:17:52 chs 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 m38813c_chip *sc_chip; 68 tx_chipset_tag_t sc_tc; 69 void *sc_ih; 70 }; 71 72 int m38813c_match(device_t, cfdata_t, void *); 73 void m38813c_attach(device_t, device_t, void *); 74 int m38813c_intr(void *); 75 int m38813c_poll(void *); 76 void m38813c_ifsetup(struct m38813c_chip *); 77 int m38813c_input_establish(void *, struct hpckbd_if *); 78 79 struct m38813c_chip m38813c_chip; 80 81 CFATTACH_DECL_NEW(m38813c, sizeof(struct m38813c_softc), 82 m38813c_match, m38813c_attach, NULL, NULL); 83 84 int 85 m38813c_match(device_t parent, cfdata_t cf, void *aux) 86 { 87 88 return (1); 89 } 90 91 void 92 m38813c_attach(device_t parent, device_t self, void *aux) 93 { 94 struct cs_attach_args *ca = aux; 95 struct m38813c_softc *sc = device_private(self); 96 struct hpckbd_attach_args haa; 97 98 sc->sc_tc = ca->ca_tc; 99 sc->sc_chip = &m38813c_chip; 100 sc->sc_chip->scc_cst = ca->ca_csio.cstag; 101 102 if (bus_space_map(sc->sc_chip->scc_cst, ca->ca_csio.csbase, 103 ca->ca_csio.cssize, 0, &sc->sc_chip->scc_csh)) { 104 printf(": can't map i/o space\n"); 105 } 106 107 #ifndef USE_POLL 108 #error options USE_POLL required. 109 #endif 110 if (!(sc->sc_ih = tx39_poll_establish(sc->sc_tc, 1, 111 IPL_TTY, m38813c_intr, 112 sc))) { 113 printf(": can't establish interrupt\n"); 114 } 115 116 printf("\n"); 117 118 /* setup upper interface */ 119 m38813c_ifsetup(sc->sc_chip); 120 121 haa.haa_ic = &sc->sc_chip->scc_if; 122 123 config_found(self, &haa, hpckbd_print); 124 } 125 126 void 127 m38813c_ifsetup(struct m38813c_chip *scc) 128 { 129 130 scc->scc_if.hii_ctx = scc; 131 132 scc->scc_if.hii_establish = m38813c_input_establish; 133 scc->scc_if.hii_poll = m38813c_intr; 134 } 135 136 int 137 m38813c_cnattach(paddr_t addr) 138 { 139 struct m38813c_chip *scc = &m38813c_chip; 140 141 scc->scc_csh = MIPS_PHYS_TO_KSEG1(addr); 142 143 m38813c_ifsetup(scc); 144 145 hpckbd_cnattach(&scc->scc_if); 146 147 return (0); 148 } 149 150 int 151 m38813c_input_establish(void *ic, struct hpckbd_if *kbdif) 152 { 153 struct m38813c_chip *scc = ic; 154 155 /* save lower interface */ 156 scc->scc_hpckbd = kbdif; 157 158 scc->scc_enabled = 1; 159 160 return (0); 161 } 162 163 #define KBR_EXTENDED0 0xE0 /* extended key sequence */ 164 #define KBR_EXTENDED1 0xE1 /* extended key sequence */ 165 166 int 167 m38813c_intr(void *arg) 168 { 169 struct m38813c_softc *sc = arg; 170 171 return (m38813c_poll(sc->sc_chip)); 172 } 173 174 int 175 m38813c_poll(void *arg) 176 { 177 struct m38813c_chip *scc = arg; 178 bus_space_tag_t t = scc->scc_cst; 179 bus_space_handle_t h = scc->scc_csh; 180 int datain, type, key; 181 182 if (!scc->scc_enabled) { 183 return (0); 184 } 185 186 datain= bus_space_read_1(t, h, 0); 187 188 hpckbd_input_hook(scc->scc_hpckbd); 189 190 if (datain == KBR_EXTENDED0) { 191 scc->t_extended = 1; 192 return (0); 193 } else if (datain == KBR_EXTENDED1) { 194 scc->t_extended1 = 2; 195 return (0); 196 } 197 198 /* map extended keys to (unused) codes 128-254 */ 199 key = (datain & 0x7f) | (scc->t_extended ? 0x80 : 0); 200 scc->t_extended = 0; 201 202 /* 203 * process BREAK key (EXT1 1D 45 EXT1 9D C5): 204 * map to (unused) code 7F 205 */ 206 if (scc->t_extended1 == 2 && (datain == 0x1d || datain == 0x9d)) { 207 scc->t_extended1 = 1; 208 return (0); 209 } else if (scc->t_extended1 == 1 && 210 (datain == 0x45 || datain == 0xc5)) { 211 scc->t_extended1 = 0; 212 key = 0x7f; 213 } else if (scc->t_extended1 > 0) { 214 scc->t_extended1 = 0; 215 } 216 217 if (datain & 0x80) { 218 scc->t_lastchar = 0; 219 type = 0; 220 } else { 221 /* Always ignore typematic keys */ 222 if (key == scc->t_lastchar) 223 return 0; 224 scc->t_lastchar = key; 225 type = 1; 226 } 227 228 hpckbd_input(scc->scc_hpckbd, type, key); 229 230 return (0); 231 } 232