Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/i386/isa/spic.c
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1 /* 2 * Copyright (c) 2000 Nick Sayer 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * spic -- the Sony Programmable I/O Controller 27 * 28 * This device exists on most recent Sony laptops. It is the means by which 29 * you can watch the Jog Dial and some other functions. 30 * 31 * At the moment, this driver merely tries to turn the jog dial into a 32 * device that moused can park on, with the intent of supplying a Z axis 33 * and mouse button out of the jog dial. I suspect that this device will 34 * end up having to support at least 2 different minor devices: One to be 35 * the jog wheel device for moused to camp out on and the other to perform 36 * all of the other miscelaneous functions of this device. But for now, 37 * the jog wheel is all you get. 38 * 39 * At the moment, the data sent back by the device is rather primitive. 40 * It sends a single character per event: 41 * u = up, d = down -- that's the jog button 42 * l = left, r = right -- that's the dial. 43 * "left" and "right" are rather caprecious. They actually represent 44 * ccw and cw, respectively 45 * 46 * What documentation exists is thanks to Andrew Tridge, and his page at 47 * http://samba.org/picturebook/ Special thanks also to Ian Dowse, who 48 * also provided sample code upon which this driver was based. 49 * 50 * $FreeBSD: releng/5.1/sys/i386/isa/spic.c 111815 2003-03-03 12:15:54Z phk $ 51 */ 52 53 #include <sys/param.h> 54 #include <sys/systm.h> 55 #include <sys/kernel.h> 56 #include <sys/bus.h> 57 #include <machine/bus.h> 58 #include <sys/rman.h> 59 #include <machine/resource.h> 60 #include <isa/isavar.h> 61 #include <sys/poll.h> 62 #include <machine/pci_cfgreg.h> 63 #include <machine/clock.h> 64 #include <sys/tty.h> 65 #include <sys/conf.h> 66 #include <sys/fcntl.h> 67 #include <sys/malloc.h> 68 #include <sys/sysctl.h> 69 #include <sys/uio.h> 70 71 #include <i386/isa/spicreg.h> 72 73 static int spic_pollrate; 74 75 SYSCTL_INT(_machdep, OID_AUTO, spic_pollrate, CTLFLAG_RW, &spic_pollrate, 0, "") 76 ; 77 78 devclass_t spic_devclass; 79 80 static d_open_t spicopen; 81 static d_close_t spicclose; 82 static d_read_t spicread; 83 static d_ioctl_t spicioctl; 84 static d_poll_t spicpoll; 85 86 static struct cdevsw spic_cdevsw = { 87 .d_open = spicopen, 88 .d_close = spicclose, 89 .d_read = spicread, 90 .d_ioctl = spicioctl, 91 .d_poll = spicpoll, 92 .d_name = "spic", 93 .d_maj = CDEV_MAJOR, 94 }; 95 96 #define SCBUFLEN 128 97 98 struct spic_softc { 99 u_short sc_port_addr; 100 u_char sc_intr; 101 struct resource *sc_port_res,*sc_intr_res; 102 int sc_port_rid,sc_intr_rid; 103 int sc_opened; 104 int sc_sleeping; 105 int sc_buttonlast; 106 struct callout_handle sc_timeout_ch; 107 device_t sc_dev; 108 struct selinfo sc_rsel; 109 u_char sc_buf[SCBUFLEN]; 110 int sc_count; 111 int sc_model; 112 }; 113 114 static void 115 write_port1(struct spic_softc *sc, u_char val) 116 { 117 DELAY(10); 118 outb(sc->sc_port_addr, val); 119 } 120 121 static void 122 write_port2(struct spic_softc *sc, u_char val) 123 { 124 DELAY(10); 125 outb(sc->sc_port_addr + 4, val); 126 } 127 128 static u_char 129 read_port1(struct spic_softc *sc) 130 { 131 DELAY(10); 132 return inb(sc->sc_port_addr); 133 } 134 135 static u_char 136 read_port2(struct spic_softc *sc) 137 { 138 DELAY(10); 139 return inb(sc->sc_port_addr + 4); 140 } 141 142 static u_char 143 read_port_cst(struct spic_softc *sc) 144 { 145 DELAY(10); 146 return inb(SPIC_CST_IOPORT); 147 } 148 149 static void 150 busy_wait(struct spic_softc *sc) 151 { 152 int i=0; 153 154 while(read_port2(sc) & 2) { 155 DELAY(10); 156 if (i++>10000) { 157 printf("spic busy wait abort\n"); 158 return; 159 } 160 } 161 } 162 163 static void 164 busy_wait_cst(struct spic_softc *sc, int mask) 165 { 166 int i=0; 167 168 while(read_port_cst(sc) & mask) { 169 DELAY(10); 170 if (i++>10000) { 171 printf("spic busy wait abort\n"); 172 return; 173 } 174 } 175 } 176 177 static u_char 178 spic_call1(struct spic_softc *sc, u_char dev) { 179 busy_wait(sc); 180 write_port2(sc, dev); 181 read_port2(sc); 182 return read_port1(sc); 183 } 184 185 static u_char 186 spic_call2(struct spic_softc *sc, u_char dev, u_char fn) 187 { 188 busy_wait(sc); 189 write_port2(sc, dev); 190 busy_wait(sc); 191 write_port1(sc, fn); 192 return read_port1(sc); 193 } 194 195 static void 196 spic_ecrset(struct spic_softc *sc, u_int16_t addr, u_int16_t value) 197 { 198 busy_wait_cst(sc, 3); 199 outb(SPIC_CST_IOPORT, 0x81); 200 busy_wait_cst(sc, 2); 201 outb(SPIC_DATA_IOPORT, addr); 202 busy_wait_cst(sc, 2); 203 outb(SPIC_DATA_IOPORT, value); 204 busy_wait_cst(sc, 2); 205 } 206 207 static void 208 spic_type2_srs(struct spic_softc *sc) 209 { 210 spic_ecrset(sc, SPIC_SHIB, (sc->sc_port_addr & 0xFF00) >> 8); 211 spic_ecrset(sc, SPIC_SLOB, sc->sc_port_addr & 0x00FF); 212 spic_ecrset(sc, SPIC_SIRQ, 0x00); /* using polling mode (IRQ=0)*/ 213 DELAY(10); 214 } 215 216 static int 217 spic_probe(device_t dev) 218 { 219 struct spic_softc *sc; 220 u_char t, spic_irq; 221 222 sc = device_get_softc(dev); 223 224 /* 225 * We can only have 1 of these. Attempting to probe for a unit 1 226 * will destroy the work we did for unit 0 227 */ 228 if (device_get_unit(dev)) 229 return ENXIO; 230 231 bzero(sc, sizeof(struct spic_softc)); 232 233 if (!(sc->sc_port_res = bus_alloc_resource(dev, SYS_RES_IOPORT, 234 &sc->sc_port_rid, 0, ~0, 5, RF_ACTIVE))) { 235 device_printf(dev,"Couldn't map I/O\n"); 236 return ENXIO; 237 } 238 sc->sc_port_addr = (u_short)rman_get_start(sc->sc_port_res); 239 240 #ifdef notyet 241 if (!(sc->sc_intr_res = bus_alloc_resource(dev, SYS_RES_IRQ, 242 &sc->sc_intr_rid, 0, ~0, 1, RF_ACTIVE))) { 243 device_printf(dev,"Couldn't map IRQ\n"); 244 bus_release_resource(dev, SYS_RES_IOPORT, 245 sc->sc_port_rid, sc->sc_port_res); 246 return ENXIO; 247 } 248 sc->sc_intr = (u_short)rman_get_start(sc->sc_intr_res); 249 250 switch (sc->sc_intr) { 251 case 0: spic_irq = 3; break; 252 case 5: spic_irq = 0; break; 253 case 0xa: spic_irq = 1; break; 254 case 0xb: spic_irq = 2; break; 255 default: device_printf(dev,"Invalid IRQ\n"); 256 bus_release_resource(dev, SYS_RES_IOPORT, 257 sc->sc_port_rid, sc->sc_port_res); 258 bus_release_resource(dev, SYS_RES_IRQ, 259 sc->sc_intr_rid, sc->sc_intr_res); 260 return ENXIO; 261 } 262 #else 263 spic_irq = 3; 264 #endif 265 266 #if 0 267 if (sc->sc_port_addr != 0x10A0) { 268 bus_release_resource(dev, SYS_RES_IOPORT, 269 sc->sc_port_rid, sc->sc_port_res); 270 bus_release_resource(dev, SYS_RES_IRQ, 271 sc->sc_intr_rid, sc->sc_intr_res); 272 return ENXIO; 273 } 274 #endif 275 276 /* PIIX4 chipset at least? */ 277 if (pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, 0, 4) == 278 PIIX4_DEVID) { 279 sc->sc_model = SPIC_DEVICE_MODEL_TYPE1; 280 } else { 281 /* For newer VAIOs (R505, SRX7, ...) */ 282 sc->sc_model = SPIC_DEVICE_MODEL_TYPE2; 283 } 284 285 /* 286 * This is an ugly hack. It is necessary until ACPI works correctly. 287 * 288 * The SPIC consists of 2 registers. They are mapped onto I/O by the 289 * PIIX4's General Device 10 function. There is also an interrupt 290 * control port at a somewhat magic location, but this first pass is 291 * polled. 292 * 293 * So the first thing we need to do is map the G10 space in. 294 * 295 */ 296 297 /* Enable ACPI mode to get Fn key events */ 298 /* XXX This may slow down your VAIO if ACPI is not supported in the kernel. 299 outb(0xb2, 0xf0); 300 */ 301 302 device_printf(dev,"device model type = %d\n", sc->sc_model); 303 304 if(sc->sc_model == SPIC_DEVICE_MODEL_TYPE1) { 305 pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10A, 306 sc->sc_port_addr, 2); 307 t = pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, 1); 308 t &= 0xf0; 309 t |= 4; 310 pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, t, 1); 311 outw(SPIC_IRQ_PORT, (inw(SPIC_IRQ_PORT) & ~(0x3 << SPIC_IRQ_SHIFT)) | (spic_irq << SPIC_IRQ_SHIFT)); 312 t = pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, 1); 313 t &= 0x1f; 314 t |= 0xc0; 315 pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, t, 1); 316 } else { 317 spic_type2_srs(sc); 318 } 319 320 /* 321 * XXX: Should try and see if there's anything actually there. 322 */ 323 324 device_set_desc(dev, "Sony Programmable I/O Controller"); 325 326 return 0; 327 } 328 329 static int 330 spic_attach(device_t dev) 331 { 332 struct spic_softc *sc; 333 334 sc = device_get_softc(dev); 335 336 sc->sc_dev = dev; 337 338 spic_pollrate = (hz/50); /* Every 50th of a second */ 339 340 spic_call1(sc, 0x82); 341 spic_call2(sc, 0x81, 0xff); 342 spic_call1(sc, 0x92); 343 344 /* There can be only one */ 345 make_dev(&spic_cdevsw, 0, 0, 0, 0600, "jogdial"); 346 347 return 0; 348 } 349 350 static void 351 spictimeout(void *arg) 352 { 353 struct spic_softc *sc = arg; 354 u_char b, event, param; 355 int j; 356 357 if (!sc->sc_opened) { 358 device_printf(sc->sc_dev, "timeout called while closed!\n"); 359 return; 360 } 361 362 event = read_port2(sc); 363 param = read_port1(sc); 364 365 if ((event != 4) && (!(event & 0x1))) 366 switch(event) { 367 case 0x10: /* jog wheel event (type1) */ 368 if (sc->sc_model == SPIC_DEVICE_MODEL_TYPE1) { 369 b = !!(param & 0x40); 370 if (b != sc->sc_buttonlast) { 371 sc->sc_buttonlast = b; 372 sc->sc_buf[sc->sc_count++] = 373 b?'d':'u'; 374 } 375 j = (param & 0xf) | ((param & 0x10)? ~0xf:0); 376 if (j<0) 377 while(j++!=0) { 378 sc->sc_buf[sc->sc_count++] = 379 'l'; 380 } 381 else if (j>0) 382 while(j--!=0) { 383 sc->sc_buf[sc->sc_count++] = 384 'r'; 385 } 386 } 387 break; 388 case 0x08: /* jog wheel event (type2) */ 389 case 0x00: 390 /* SPIC_DEVICE_MODEL_TYPE2 returns jog wheel event=0x00 */ 391 if (sc->sc_model == SPIC_DEVICE_MODEL_TYPE2) { 392 b = !!(param & 0x40); 393 if (b != sc->sc_buttonlast) { 394 sc->sc_buttonlast = b; 395 sc->sc_buf[sc->sc_count++] = 396 b?'d':'u'; 397 } 398 j = (param & 0xf) | ((param & 0x10)? ~0xf:0); 399 if (j<0) 400 while(j++!=0) { 401 sc->sc_buf[sc->sc_count++] = 402 'l'; 403 } 404 else if (j>0) 405 while(j--!=0) { 406 sc->sc_buf[sc->sc_count++] = 407 'r'; 408 } 409 } 410 break; 411 case 0x60: /* Capture button */ 412 printf("Capture button event: %x\n",param); 413 break; 414 case 0x30: /* Lid switch */ 415 printf("Lid switch event: %x\n",param); 416 break; 417 case 0x0c: /* We must ignore these type of event for C1VP... */ 418 case 0x70: /* Closing/Opening the lid on C1VP */ 419 break; 420 default: 421 printf("Unknown event: event %02x param %02x\n", event, param); 422 break; 423 } 424 else { 425 /* No event. Wait some more */ 426 sc->sc_timeout_ch = timeout(spictimeout, sc, spic_pollrate); 427 return; 428 } 429 430 if (sc->sc_count) { 431 if (sc->sc_sleeping) { 432 sc->sc_sleeping = 0; 433 wakeup( sc); 434 } 435 selwakeup(&sc->sc_rsel); 436 } 437 spic_call2(sc, 0x81, 0xff); /* Clear event */ 438 439 sc->sc_timeout_ch = timeout(spictimeout, sc, spic_pollrate); 440 } 441 442 static int 443 spicopen(dev_t dev, int flag, int fmt, struct thread *td) 444 { 445 struct spic_softc *sc; 446 447 sc = devclass_get_softc(spic_devclass, 0); 448 449 if (sc->sc_opened) 450 return EBUSY; 451 452 sc->sc_opened++; 453 sc->sc_count=0; 454 455 /* Start the polling */ 456 timeout(spictimeout, sc, spic_pollrate); 457 return 0; 458 } 459 460 static int 461 spicclose(dev_t dev, int flag, int fmt, struct thread *td) 462 { 463 struct spic_softc *sc; 464 465 sc = devclass_get_softc(spic_devclass, 0); 466 467 /* Stop polling */ 468 untimeout(spictimeout, sc, sc->sc_timeout_ch); 469 sc->sc_opened = 0; 470 return 0; 471 } 472 473 static int 474 spicread(dev_t dev, struct uio *uio, int flag) 475 { 476 struct spic_softc *sc; 477 int l, s, error; 478 u_char buf[SCBUFLEN]; 479 480 sc = devclass_get_softc(spic_devclass, 0); 481 482 if (uio->uio_resid <= 0) /* What kind of a read is this?! */ 483 return 0; 484 485 s = spltty(); 486 while (!(sc->sc_count)) { 487 sc->sc_sleeping=1; 488 error = tsleep( sc, PZERO | PCATCH, "jogrea", 0); 489 sc->sc_sleeping=0; 490 if (error) { 491 splx(s); 492 return error; 493 } 494 } 495 splx(s); 496 497 s = spltty(); 498 l = min(uio->uio_resid, sc->sc_count); 499 bcopy(sc->sc_buf, buf, l); 500 sc->sc_count -= l; 501 bcopy(sc->sc_buf + l, sc->sc_buf, l); 502 splx(s); 503 return uiomove(buf, l, uio); 504 505 } 506 507 static int 508 spicioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 509 { 510 struct spic_softc *sc; 511 512 sc = devclass_get_softc(spic_devclass, 0); 513 514 return EIO; 515 } 516 517 static int 518 spicpoll(dev_t dev, int events, struct thread *td) 519 { 520 struct spic_softc *sc; 521 int revents = 0, s; 522 523 sc = devclass_get_softc(spic_devclass, 0); 524 s = spltty(); 525 if (events & (POLLIN | POLLRDNORM)) { 526 if (sc->sc_count) 527 revents |= events & (POLLIN | POLLRDNORM); 528 else 529 selrecord(td, &sc->sc_rsel); /* Who shall we wake? */ 530 } 531 splx(s); 532 533 return revents; 534 } 535 536 537 static device_method_t spic_methods[] = { 538 DEVMETHOD(device_probe, spic_probe), 539 DEVMETHOD(device_attach, spic_attach), 540 541 { 0, 0 } 542 }; 543 544 static driver_t spic_driver = { 545 "spic", 546 spic_methods, 547 sizeof(struct spic_softc), 548 }; 549 550 DRIVER_MODULE(spic, isa, spic_driver, spic_devclass, 0, 0); 551
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