macekbc.c revision 1.2
1 /* $NetBSD: macekbc.c,v 1.2 2007/04/14 15:11:39 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 Jared D. McNeill <jmcneill (at) invisible.ca> 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. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Jared D. McNeill. 18 * 4. Neither the name of The NetBSD Foundation nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 /* 36 * SGI MACE PS2 keyboard/mouse controller driver 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: macekbc.c,v 1.2 2007/04/14 15:11:39 jmcneill Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/device.h> 44 #include <sys/syslog.h> 45 #include <sys/malloc.h> 46 47 #include <machine/bus.h> 48 #include <machine/intr.h> 49 50 #include <sgimips/mace/macevar.h> 51 52 #include <dev/arcbios/arcbios.h> 53 #include <dev/arcbios/arcbiosvar.h> 54 #include <dev/pckbport/pckbportvar.h> 55 56 #define MACEKBC_TX 0x00 57 #define MACEKBC_RX 0x08 58 #define MACEKBC_CTRL 0x10 59 #define MACEKBC_CTRL_TXCLKOFF (1 << 0) 60 #define MACEKBC_CTRL_TXON (1 << 1) 61 #define MACEKBC_CTRL_TXINTEN (1 << 2) 62 #define MACEKBC_CTRL_RXINTEN (1 << 3) 63 #define MACEKBC_CTRL_RXCLKON (1 << 4) 64 #define MACEKBC_CTRL_RESET (1 << 5) 65 #define MACEKBC_STAT 0x18 66 #define MACEKBC_STAT_TXEMPTY (1 << 3) 67 #define MACEKBC_STAT_RXFULL (1 << 4) 68 69 struct macekbc_softc { 70 struct device sc_dev; 71 struct macekbc_internal *sc_id; 72 73 bus_space_tag_t sc_iot; 74 bus_space_handle_t sc_ioh; 75 }; 76 77 struct macekbc_internal { 78 struct macekbc_softc *t_sc; 79 pckbport_tag_t t_pt; 80 81 bus_space_tag_t t_iot; 82 bus_space_handle_t t_ioh[PCKBPORT_NSLOTS]; 83 int t_present[PCKBPORT_NSLOTS]; 84 85 void *t_rxih; 86 }; 87 88 static int macekbc_intr(void *); 89 static void macekbc_reset(struct macekbc_internal *, pckbport_slot_t); 90 91 static int macekbc_xt_translation(void *, pckbport_slot_t, int); 92 static int macekbc_send_devcmd(void *, pckbport_slot_t, u_char); 93 static int macekbc_poll_data1(void *, pckbport_slot_t); 94 static void macekbc_slot_enable(void *, pckbport_slot_t, int); 95 static void macekbc_intr_establish(void *, pckbport_slot_t); 96 static void macekbc_set_poll(void *, pckbport_slot_t, int); 97 98 static int macekbc_match(struct device *, struct cfdata *, void *); 99 static void macekbc_attach(struct device *, struct device *, void *); 100 101 CFATTACH_DECL(macekbc, sizeof(struct macekbc_softc), 102 macekbc_match, macekbc_attach, NULL, NULL); 103 104 static struct pckbport_accessops macekbc_ops = { 105 .t_xt_translation = macekbc_xt_translation, 106 .t_send_devcmd = macekbc_send_devcmd, 107 .t_poll_data1 = macekbc_poll_data1, 108 .t_slot_enable = macekbc_slot_enable, 109 .t_intr_establish = macekbc_intr_establish, 110 .t_set_poll = macekbc_set_poll, 111 }; 112 113 static int 114 macekbc_match(struct device *parent, struct cfdata *match, void *aux) 115 { 116 const char *consdev; 117 118 /* XXX don't bother attaching if we're using a serial console */ 119 consdev = ARCBIOS->GetEnvironmentVariable("ConsoleIn"); 120 if (consdev == NULL || strcmp(consdev, "keyboard()") != 0) 121 return 0; 122 123 return 1; 124 } 125 126 static void 127 macekbc_attach(struct device *parent, struct device *self, void *aux) 128 { 129 struct mace_attach_args *maa; 130 struct macekbc_softc *sc; 131 struct macekbc_internal *t; 132 int slot; 133 134 maa = aux; 135 sc = device_private(self); 136 137 aprint_normal(": PS2 controller\n"); 138 aprint_naive("\n"); 139 140 t = malloc(sizeof(struct macekbc_internal), M_DEVBUF, M_NOWAIT|M_ZERO); 141 if (t == NULL) { 142 aprint_error("%s: not enough memory\n", device_xname(self)); 143 return; 144 } 145 t->t_iot = maa->maa_st; 146 for (slot = 0; slot < PCKBPORT_NSLOTS; slot++) 147 t->t_present[slot] = 0; 148 if (bus_space_subregion(t->t_iot, maa->maa_sh, maa->maa_offset, 149 0, &t->t_ioh[PCKBPORT_KBD_SLOT]) != 0) { 150 aprint_error("%s: couldn't map kbd registers\n", 151 device_xname(self)); 152 return; 153 } 154 if (bus_space_subregion(t->t_iot, maa->maa_sh, maa->maa_offset + 32, 155 0, &t->t_ioh[PCKBPORT_AUX_SLOT]) != 0) { 156 aprint_error("%s: couldn't map aux registers\n", 157 device_xname(self)); 158 return; 159 } 160 161 if ((t->t_rxih = cpu_intr_establish(maa->maa_intr, maa->maa_intrmask, 162 macekbc_intr, t)) == NULL) { 163 printf("%s: couldn't establish interrupt\n", 164 device_xname(self)); 165 return; 166 } 167 sc->sc_id = t; 168 t->t_sc = sc; 169 170 macekbc_reset(t, PCKBPORT_KBD_SLOT); 171 macekbc_reset(t, PCKBPORT_AUX_SLOT); 172 173 t->t_pt = pckbport_attach(t, &macekbc_ops); 174 if (pckbport_attach_slot(&sc->sc_dev, t->t_pt, PCKBPORT_KBD_SLOT)) 175 t->t_present[PCKBPORT_KBD_SLOT] = 1; 176 if (pckbport_attach_slot(&sc->sc_dev, t->t_pt, PCKBPORT_AUX_SLOT)) 177 t->t_present[PCKBPORT_AUX_SLOT] = 1; 178 179 return; 180 } 181 182 static int 183 macekbc_intr(void *opaque) 184 { 185 struct macekbc_internal *t; 186 bus_space_tag_t iot; 187 bus_space_handle_t ioh; 188 uint64_t stat, val; 189 pckbport_slot_t slot; 190 int rv; 191 192 t = opaque; 193 iot = t->t_iot; 194 rv = 0; 195 196 for (slot = 0; slot < PCKBPORT_NSLOTS; slot++) { 197 if (t->t_present[slot] == 0) 198 continue; 199 200 ioh = t->t_ioh[slot]; 201 stat = bus_space_read_8(iot, ioh, MACEKBC_STAT); 202 if (stat & MACEKBC_STAT_RXFULL) { 203 val = bus_space_read_8(iot, ioh, MACEKBC_RX); 204 pckbportintr(t->t_pt, slot, val & 0xff); 205 rv = 1; 206 } 207 } 208 209 return rv; 210 } 211 212 static void 213 macekbc_reset(struct macekbc_internal *t, pckbport_slot_t slot) 214 { 215 bus_space_tag_t iot; 216 bus_space_handle_t ioh; 217 uint64_t val; 218 219 iot = t->t_iot; 220 ioh = t->t_ioh[slot]; 221 222 val = bus_space_read_8(iot, ioh, MACEKBC_CTRL); 223 val |= MACEKBC_CTRL_TXCLKOFF | MACEKBC_CTRL_RESET; 224 bus_space_write_8(iot, ioh, MACEKBC_CTRL, val); 225 226 delay(10000); 227 228 val &= ~(MACEKBC_CTRL_TXCLKOFF | MACEKBC_CTRL_RESET); 229 val |= MACEKBC_CTRL_TXON | MACEKBC_CTRL_RXCLKON | MACEKBC_CTRL_RXINTEN; 230 bus_space_write_8(iot, ioh, MACEKBC_CTRL, val); 231 232 return; 233 } 234 235 static int 236 macekbc_wait(struct macekbc_internal *t, pckbport_slot_t slot, 237 uint64_t mask, bool set) 238 { 239 bus_space_tag_t iot; 240 bus_space_handle_t ioh; 241 uint64_t val, tmp; 242 int timeout; 243 244 iot = t->t_iot; 245 ioh = t->t_ioh[slot]; 246 val = (set ? mask : 0); 247 timeout = 1000; 248 249 while (timeout-- > 0) { 250 tmp = bus_space_read_8(iot, ioh, MACEKBC_STAT); 251 if ((tmp & mask) == val) 252 return 0; 253 delay(10); 254 } 255 256 return 1; 257 } 258 259 static int 260 macekbc_xt_translation(void *opaque, pckbport_slot_t port, int on) 261 { 262 263 if (on) 264 return 0; 265 266 return 1; 267 } 268 269 static int 270 macekbc_send_devcmd(void *opaque, pckbport_slot_t slot, u_char byte) 271 { 272 struct macekbc_internal *t; 273 bus_space_tag_t iot; 274 bus_space_handle_t ioh; 275 276 t = opaque; 277 iot = t->t_iot; 278 ioh = t->t_ioh[slot]; 279 280 if (macekbc_wait(t, slot, MACEKBC_STAT_TXEMPTY, 1)) 281 return 0; 282 283 bus_space_write_8(iot, ioh, MACEKBC_TX, byte & 0xff); 284 285 return 1; 286 } 287 288 static int 289 macekbc_poll_data1(void *opaque, pckbport_slot_t slot) 290 { 291 struct macekbc_internal *t; 292 bus_space_tag_t iot; 293 bus_space_handle_t ioh; 294 295 t = opaque; 296 iot = t->t_iot; 297 ioh = t->t_ioh[slot]; 298 299 if (macekbc_wait(t, slot, MACEKBC_STAT_RXFULL, 1)) /* rx full */ 300 return -1; 301 302 return bus_space_read_8(iot, ioh, MACEKBC_RX) & 0xff; 303 } 304 305 static void 306 macekbc_slot_enable(void *opaque, pckbport_slot_t slot, int on) 307 { 308 struct macekbc_internal *t; 309 bus_space_tag_t iot; 310 bus_space_handle_t ioh; 311 uint64_t val; 312 313 t = opaque; 314 iot = t->t_iot; 315 ioh = t->t_ioh[slot]; 316 317 val = bus_space_read_8(iot, ioh, MACEKBC_CTRL); 318 if (on) 319 val |= MACEKBC_CTRL_TXON | MACEKBC_CTRL_RXCLKON; 320 else 321 val &= ~(MACEKBC_CTRL_TXON | MACEKBC_CTRL_RXCLKON); 322 bus_space_write_8(iot, ioh, MACEKBC_CTRL, val); 323 324 return; 325 } 326 327 static void 328 macekbc_intr_establish(void *opaque, pckbport_slot_t slot) 329 { 330 331 /* XXX */ 332 macekbc_set_poll(opaque, slot, 0); 333 334 return; 335 } 336 337 static void 338 macekbc_set_poll(void *opaque, pckbport_slot_t slot, int on) 339 { 340 struct macekbc_internal *t; 341 bus_space_tag_t iot; 342 bus_space_handle_t ioh; 343 uint64_t val; 344 345 t = opaque; 346 iot = t->t_iot; 347 ioh = t->t_ioh[slot]; 348 349 val = bus_space_read_8(iot, ioh, MACEKBC_CTRL); 350 if (on) 351 val &= ~MACEKBC_CTRL_RXINTEN; 352 else 353 val |= MACEKBC_CTRL_RXINTEN; 354 bus_space_write_8(iot, ioh, MACEKBC_CTRL, val); 355 356 return; 357 } 358
Indexes created Thu Oct 02 14:10:14 GMT 2025