spic.c revision 296137
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 27/* spic -- the Sony Programmable I/O Controller 28 * 29 * This device exists on most recent Sony laptops. It is the means by which 30 * you can watch the Jog Dial and some other functions. 31 * 32 * At the moment, this driver merely tries to turn the jog dial into a 33 * device that moused can park on, with the intent of supplying a Z axis 34 * and mouse button out of the jog dial. I suspect that this device will 35 * end up having to support at least 2 different minor devices: One to be 36 * the jog wheel device for moused to camp out on and the other to perform 37 * all of the other miscellaneous functions of this device. But for now, 38 * the jog wheel is all you get. 39 * 40 * At the moment, the data sent back by the device is rather primitive. 41 * It sends a single character per event: 42 * u = up, d = down -- that's the jog button 43 * l = left, r = right -- that's the dial. 44 * "left" and "right" are rather capricious. They actually represent 45 * ccw and cw, respectively 46 * 47 * What documentation exists is thanks to Andrew Tridge, and his page at 48 * http://samba.org/picturebook/ Special thanks also to Ian Dowse, who 49 * also provided sample code upon which this driver was based. 50 */ 51 52#include <sys/cdefs.h> 53__FBSDID("$FreeBSD: head/sys/i386/isa/spic.c 296137 2016-02-27 03:38:01Z jhibbits $"); 54 55#include <sys/param.h> 56#include <sys/systm.h> 57#include <sys/kernel.h> 58#include <sys/module.h> 59#include <sys/bus.h> 60#include <machine/bus.h> 61#include <sys/rman.h> 62#include <machine/resource.h> 63#include <isa/isavar.h> 64#include <sys/poll.h> 65#include <machine/pci_cfgreg.h> 66#include <sys/tty.h> 67#include <sys/conf.h> 68#include <sys/fcntl.h> 69#include <sys/malloc.h> 70#include <sys/sysctl.h> 71#include <sys/uio.h> 72 73#include <i386/isa/spicreg.h> 74 75static int spic_pollrate; 76 77SYSCTL_INT(_machdep, OID_AUTO, spic_pollrate, CTLFLAG_RW, &spic_pollrate, 0, "") 78; 79 80devclass_t spic_devclass; 81 82static d_open_t spicopen; 83static d_close_t spicclose; 84static d_read_t spicread; 85static d_ioctl_t spicioctl; 86static d_poll_t spicpoll; 87 88static struct cdevsw spic_cdevsw = { 89 .d_version = D_VERSION, 90 .d_open = spicopen, 91 .d_close = spicclose, 92 .d_read = spicread, 93 .d_ioctl = spicioctl, 94 .d_poll = spicpoll, 95 .d_name = "spic", 96}; 97 98#define SCBUFLEN 128 99 100struct spic_softc { 101 u_int sc_port_addr; 102 u_char sc_intr; 103 struct resource *sc_port_res,*sc_intr_res; 104 int sc_port_rid,sc_intr_rid; 105 int sc_opened; 106 int sc_sleeping; 107 int sc_buttonlast; 108 struct callout sc_timeout; 109 struct mtx sc_lock; 110 device_t sc_dev; 111 struct cdev *sc_cdev; 112 struct selinfo sc_rsel; 113 u_char sc_buf[SCBUFLEN]; 114 int sc_count; 115 int sc_model; 116}; 117 118static void 119write_port1(struct spic_softc *sc, u_char val) 120{ 121 DELAY(10); 122 outb(sc->sc_port_addr, val); 123} 124 125static void 126write_port2(struct spic_softc *sc, u_char val) 127{ 128 DELAY(10); 129 outb(sc->sc_port_addr + 4, val); 130} 131 132static u_char 133read_port1(struct spic_softc *sc) 134{ 135 DELAY(10); 136 return inb(sc->sc_port_addr); 137} 138 139static u_char 140read_port2(struct spic_softc *sc) 141{ 142 DELAY(10); 143 return inb(sc->sc_port_addr + 4); 144} 145 146static u_char 147read_port_cst(struct spic_softc *sc) 148{ 149 DELAY(10); 150 return inb(SPIC_CST_IOPORT); 151} 152 153static void 154busy_wait(struct spic_softc *sc) 155{ 156 int i=0; 157 158 while(read_port2(sc) & 2) { 159 DELAY(10); 160 if (i++>10000) { 161 printf("spic busy wait abort\n"); 162 return; 163 } 164 } 165} 166 167static void 168busy_wait_cst(struct spic_softc *sc, int mask) 169{ 170 int i=0; 171 172 while(read_port_cst(sc) & mask) { 173 DELAY(10); 174 if (i++>10000) { 175 printf("spic busy wait abort\n"); 176 return; 177 } 178 } 179} 180 181static u_char 182spic_call1(struct spic_softc *sc, u_char dev) { 183 busy_wait(sc); 184 write_port2(sc, dev); 185 read_port2(sc); 186 return read_port1(sc); 187} 188 189static u_char 190spic_call2(struct spic_softc *sc, u_char dev, u_char fn) 191{ 192 busy_wait(sc); 193 write_port2(sc, dev); 194 busy_wait(sc); 195 write_port1(sc, fn); 196 return read_port1(sc); 197} 198 199static void 200spic_ecrset(struct spic_softc *sc, u_int16_t addr, u_int16_t value) 201{ 202 busy_wait_cst(sc, 3); 203 outb(SPIC_CST_IOPORT, 0x81); 204 busy_wait_cst(sc, 2); 205 outb(SPIC_DATA_IOPORT, addr); 206 busy_wait_cst(sc, 2); 207 outb(SPIC_DATA_IOPORT, value); 208 busy_wait_cst(sc, 2); 209} 210 211static void 212spic_type2_srs(struct spic_softc *sc) 213{ 214 spic_ecrset(sc, SPIC_SHIB, (sc->sc_port_addr & 0xFF00) >> 8); 215 spic_ecrset(sc, SPIC_SLOB, sc->sc_port_addr & 0x00FF); 216 spic_ecrset(sc, SPIC_SIRQ, 0x00); /* using polling mode (IRQ=0)*/ 217 DELAY(10); 218} 219 220static int 221spic_probe(device_t dev) 222{ 223 struct spic_softc *sc; 224 u_char t, spic_irq; 225 226 sc = device_get_softc(dev); 227 228 /* 229 * We can only have 1 of these. Attempting to probe for a unit 1 230 * will destroy the work we did for unit 0 231 */ 232 if (device_get_unit(dev)) 233 return ENXIO; 234 235 bzero(sc, sizeof(struct spic_softc)); 236 237 if (!(sc->sc_port_res = bus_alloc_resource_anywhere(dev, SYS_RES_IOPORT, 238 &sc->sc_port_rid, 5, RF_ACTIVE))) { 239 device_printf(dev,"Couldn't map I/O\n"); 240 return ENXIO; 241 } 242 sc->sc_port_addr = (u_short)rman_get_start(sc->sc_port_res); 243 244#ifdef notyet 245 if (!(sc->sc_intr_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, 246 &sc->sc_intr_rid, RF_ACTIVE))) { 247 device_printf(dev,"Couldn't map IRQ\n"); 248 bus_release_resource(dev, SYS_RES_IOPORT, 249 sc->sc_port_rid, sc->sc_port_res); 250 return ENXIO; 251 } 252 sc->sc_intr = (u_short)rman_get_start(sc->sc_intr_res); 253 254 switch (sc->sc_intr) { 255 case 0: spic_irq = 3; break; 256 case 5: spic_irq = 0; break; 257 case 0xa: spic_irq = 1; break; 258 case 0xb: spic_irq = 2; break; 259 default: device_printf(dev,"Invalid IRQ\n"); 260 bus_release_resource(dev, SYS_RES_IOPORT, 261 sc->sc_port_rid, sc->sc_port_res); 262 bus_release_resource(dev, SYS_RES_IRQ, 263 sc->sc_intr_rid, sc->sc_intr_res); 264 return ENXIO; 265 } 266#else 267 spic_irq = 3; 268#endif 269 270#if 0 271 if (sc->sc_port_addr != 0x10A0) { 272 bus_release_resource(dev, SYS_RES_IOPORT, 273 sc->sc_port_rid, sc->sc_port_res); 274 bus_release_resource(dev, SYS_RES_IRQ, 275 sc->sc_intr_rid, sc->sc_intr_res); 276 return ENXIO; 277 } 278#endif 279 280 /* PIIX4 chipset at least? */ 281 if (pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, 0, 4) == 282 PIIX4_DEVID) { 283 sc->sc_model = SPIC_DEVICE_MODEL_TYPE1; 284 } else { 285 /* For newer VAIOs (R505, SRX7, ...) */ 286 sc->sc_model = SPIC_DEVICE_MODEL_TYPE2; 287 } 288 289 /* 290 * This is an ugly hack. It is necessary until ACPI works correctly. 291 * 292 * The SPIC consists of 2 registers. They are mapped onto I/O by the 293 * PIIX4's General Device 10 function. There is also an interrupt 294 * control port at a somewhat magic location, but this first pass is 295 * polled. 296 * 297 * So the first thing we need to do is map the G10 space in. 298 * 299 */ 300 301 /* Enable ACPI mode to get Fn key events */ 302 /* XXX This may slow down your VAIO if ACPI is not supported in the kernel. 303 outb(0xb2, 0xf0); 304 */ 305 306 device_printf(dev,"device model type = %d\n", sc->sc_model); 307 308 if(sc->sc_model == SPIC_DEVICE_MODEL_TYPE1) { 309 pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10A, 310 sc->sc_port_addr, 2); 311 t = pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, 1); 312 t &= 0xf0; 313 t |= 4; 314 pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, t, 1); 315 outw(SPIC_IRQ_PORT, (inw(SPIC_IRQ_PORT) & ~(0x3 << SPIC_IRQ_SHIFT)) | (spic_irq << SPIC_IRQ_SHIFT)); 316 t = pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, 1); 317 t &= 0x1f; 318 t |= 0xc0; 319 pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, t, 1); 320 } else { 321 spic_type2_srs(sc); 322 } 323 324 /* 325 * XXX: Should try and see if there's anything actually there. 326 */ 327 328 device_set_desc(dev, "Sony Programmable I/O Controller"); 329 330 return 0; 331} 332 333static int 334spic_attach(device_t dev) 335{ 336 struct spic_softc *sc; 337 338 sc = device_get_softc(dev); 339 340 sc->sc_dev = dev; 341 mtx_init(&sc->sc_lock, "spic", NULL, MTX_DEF); 342 callout_init_mtx(&sc->sc_timeout, &sc->sc_lock, 0); 343 344 spic_pollrate = (hz/50); /* Every 50th of a second */ 345 346 spic_call1(sc, 0x82); 347 spic_call2(sc, 0x81, 0xff); 348 spic_call1(sc, 0x92); 349 350 /* There can be only one */ 351 sc->sc_cdev = make_dev(&spic_cdevsw, 0, 0, 0, 0600, "jogdial"); 352 sc->sc_cdev->si_drv1 = sc; 353 354 return 0; 355} 356 357static void 358spictimeout(void *arg) 359{ 360 struct spic_softc *sc = arg; 361 u_char b, event, param; 362 int j; 363 364 mtx_assert(&sc->sc_lock, MA_OWNED); 365 if (!sc->sc_opened) { 366 device_printf(sc->sc_dev, "timeout called while closed!\n"); 367 return; 368 } 369 370 event = read_port2(sc); 371 param = read_port1(sc); 372 373 if ((event != 4) && (!(event & 0x1))) 374 switch(event) { 375 case 0x10: /* jog wheel event (type1) */ 376 if (sc->sc_model == SPIC_DEVICE_MODEL_TYPE1) { 377 b = !!(param & 0x40); 378 if (b != sc->sc_buttonlast) { 379 sc->sc_buttonlast = b; 380 sc->sc_buf[sc->sc_count++] = 381 b?'d':'u'; 382 } 383 j = (param & 0xf) | ((param & 0x10)? ~0xf:0); 384 if (j<0) 385 while(j++!=0) { 386 sc->sc_buf[sc->sc_count++] = 387 'l'; 388 } 389 else if (j>0) 390 while(j--!=0) { 391 sc->sc_buf[sc->sc_count++] = 392 'r'; 393 } 394 } 395 break; 396 case 0x08: /* jog wheel event (type2) */ 397 case 0x00: 398 /* SPIC_DEVICE_MODEL_TYPE2 returns jog wheel event=0x00 */ 399 if (sc->sc_model == SPIC_DEVICE_MODEL_TYPE2) { 400 b = !!(param & 0x40); 401 if (b != sc->sc_buttonlast) { 402 sc->sc_buttonlast = b; 403 sc->sc_buf[sc->sc_count++] = 404 b?'d':'u'; 405 } 406 j = (param & 0xf) | ((param & 0x10)? ~0xf:0); 407 if (j<0) 408 while(j++!=0) { 409 sc->sc_buf[sc->sc_count++] = 410 'l'; 411 } 412 else if (j>0) 413 while(j--!=0) { 414 sc->sc_buf[sc->sc_count++] = 415 'r'; 416 } 417 } 418 break; 419 case 0x60: /* Capture button */ 420 printf("Capture button event: %x\n",param); 421 break; 422 case 0x30: /* Lid switch */ 423 printf("Lid switch event: %x\n",param); 424 break; 425 case 0x0c: /* We must ignore these type of event for C1VP... */ 426 case 0x70: /* Closing/Opening the lid on C1VP */ 427 break; 428 default: 429 printf("Unknown event: event %02x param %02x\n", event, param); 430 break; 431 } 432 else { 433 /* No event. Wait some more */ 434 callout_reset(&sc->sc_timeout, spic_pollrate, spictimeout, sc); 435 return; 436 } 437 438 if (sc->sc_count) { 439 if (sc->sc_sleeping) { 440 sc->sc_sleeping = 0; 441 wakeup( sc); 442 } 443 selwakeuppri(&sc->sc_rsel, PZERO); 444 } 445 spic_call2(sc, 0x81, 0xff); /* Clear event */ 446 447 callout_reset(&sc->sc_timeout, spic_pollrate, spictimeout, sc); 448} 449 450static int 451spicopen(struct cdev *dev, int flag, int fmt, struct thread *td) 452{ 453 struct spic_softc *sc; 454 455 sc = dev->si_drv1; 456 457 mtx_lock(&sc->sc_lock); 458 if (sc->sc_opened) { 459 mtx_unlock(&sc->sc_lock); 460 return (EBUSY); 461 } 462 463 sc->sc_opened++; 464 sc->sc_count=0; 465 466 /* Start the polling */ 467 callout_reset(&sc->sc_timeout, spic_pollrate, spictimeout, sc); 468 mtx_unlock(&sc->sc_lock); 469 return (0); 470} 471 472static int 473spicclose(struct cdev *dev, int flag, int fmt, struct thread *td) 474{ 475 struct spic_softc *sc; 476 477 sc = dev->si_drv1; 478 mtx_lock(&sc->sc_lock); 479 480 /* Stop polling */ 481 callout_stop(&sc->sc_timeout); 482 sc->sc_opened = 0; 483 mtx_unlock(&sc->sc_lock); 484 return 0; 485} 486 487static int 488spicread(struct cdev *dev, struct uio *uio, int flag) 489{ 490 struct spic_softc *sc; 491 int l, error; 492 u_char buf[SCBUFLEN]; 493 494 sc = dev->si_drv1; 495 496 if (uio->uio_resid <= 0) /* What kind of a read is this?! */ 497 return (0); 498 499 mtx_lock(&sc->sc_lock); 500 while (!(sc->sc_count)) { 501 sc->sc_sleeping=1; 502 error = mtx_sleep(sc, &sc->sc_lock, PZERO | PCATCH, "jogrea", 0); 503 sc->sc_sleeping=0; 504 if (error) { 505 mtx_unlock(&sc->sc_lock); 506 return (error); 507 } 508 } 509 510 l = min(uio->uio_resid, sc->sc_count); 511 bcopy(sc->sc_buf, buf, l); 512 sc->sc_count -= l; 513 bcopy(sc->sc_buf + l, sc->sc_buf, l); 514 mtx_unlock(&sc->sc_lock); 515 return (uiomove(buf, l, uio)); 516} 517 518static int 519spicioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 520{ 521 struct spic_softc *sc; 522 523 sc = dev->si_drv1; 524 525 return (EIO); 526} 527 528static int 529spicpoll(struct cdev *dev, int events, struct thread *td) 530{ 531 struct spic_softc *sc; 532 int revents = 0; 533 534 sc = dev->si_drv1; 535 mtx_lock(&sc->sc_lock); 536 if (events & (POLLIN | POLLRDNORM)) { 537 if (sc->sc_count) 538 revents |= events & (POLLIN | POLLRDNORM); 539 else 540 selrecord(td, &sc->sc_rsel); /* Who shall we wake? */ 541 } 542 mtx_unlock(&sc->sc_lock); 543 544 return (revents); 545} 546 547 548static device_method_t spic_methods[] = { 549 DEVMETHOD(device_probe, spic_probe), 550 DEVMETHOD(device_attach, spic_attach), 551 552 { 0, 0 } 553}; 554 555static driver_t spic_driver = { 556 "spic", 557 spic_methods, 558 sizeof(struct spic_softc), 559}; 560 561DRIVER_MODULE(spic, isa, spic_driver, spic_devclass, 0, 0); 562 563