1 /* 2 * QEMU Parallel PORT emulation 3 * 4 * Copyright (c) 2003-2005 Fabrice Bellard 5 * Copyright (c) 2007 Marko Kohtala 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 * THE SOFTWARE. 24 */ 25 #include "qemu/osdep.h" 26 #include "qapi/error.h" 27 #include "hw/hw.h" 28 #include "chardev/char-parallel.h" 29 #include "chardev/char-fe.h" 30 #include "hw/isa/isa.h" 31 #include "hw/i386/pc.h" 32 #include "sysemu/sysemu.h" 33 34 //#define DEBUG_PARALLEL 35 36 #ifdef DEBUG_PARALLEL 37 #define pdebug(fmt, ...) printf("pp: " fmt, ## __VA_ARGS__) 38 #else 39 #define pdebug(fmt, ...) ((void)0) 40 #endif 41 42 #define PARA_REG_DATA 0 43 #define PARA_REG_STS 1 44 #define PARA_REG_CTR 2 45 #define PARA_REG_EPP_ADDR 3 46 #define PARA_REG_EPP_DATA 4 47 48 /* 49 * These are the definitions for the Printer Status Register 50 */ 51 #define PARA_STS_BUSY 0x80 /* Busy complement */ 52 #define PARA_STS_ACK 0x40 /* Acknowledge */ 53 #define PARA_STS_PAPER 0x20 /* Out of paper */ 54 #define PARA_STS_ONLINE 0x10 /* Online */ 55 #define PARA_STS_ERROR 0x08 /* Error complement */ 56 #define PARA_STS_TMOUT 0x01 /* EPP timeout */ 57 58 /* 59 * These are the definitions for the Printer Control Register 60 */ 61 #define PARA_CTR_DIR 0x20 /* Direction (1=read, 0=write) */ 62 #define PARA_CTR_INTEN 0x10 /* IRQ Enable */ 63 #define PARA_CTR_SELECT 0x08 /* Select In complement */ 64 #define PARA_CTR_INIT 0x04 /* Initialize Printer complement */ 65 #define PARA_CTR_AUTOLF 0x02 /* Auto linefeed complement */ 66 #define PARA_CTR_STROBE 0x01 /* Strobe complement */ 67 68 #define PARA_CTR_SIGNAL (PARA_CTR_SELECT|PARA_CTR_INIT|PARA_CTR_AUTOLF|PARA_CTR_STROBE) 69 70 typedef struct ParallelState { 71 MemoryRegion iomem; 72 uint8_t dataw; 73 uint8_t datar; 74 uint8_t status; 75 uint8_t control; 76 qemu_irq irq; 77 int irq_pending; 78 CharBackend chr; 79 int hw_driver; 80 int epp_timeout; 81 uint32_t last_read_offset; /* For debugging */ 82 /* Memory-mapped interface */ 83 int it_shift; 84 PortioList portio_list; 85 } ParallelState; 86 87 #define TYPE_ISA_PARALLEL "isa-parallel" 88 #define ISA_PARALLEL(obj) \ 89 OBJECT_CHECK(ISAParallelState, (obj), TYPE_ISA_PARALLEL) 90 91 typedef struct ISAParallelState { 92 ISADevice parent_obj; 93 94 uint32_t index; 95 uint32_t iobase; 96 uint32_t isairq; 97 ParallelState state; 98 } ISAParallelState; 99 100 static void parallel_update_irq(ParallelState *s) 101 { 102 if (s->irq_pending) 103 qemu_irq_raise(s->irq); 104 else 105 qemu_irq_lower(s->irq); 106 } 107 108 static void 109 parallel_ioport_write_sw(void *opaque, uint32_t addr, uint32_t val) 110 { 111 ParallelState *s = opaque; 112 113 pdebug("write addr=0x%02x val=0x%02x\n", addr, val); 114 115 addr &= 7; 116 switch(addr) { 117 case PARA_REG_DATA: 118 s->dataw = val; 119 parallel_update_irq(s); 120 break; 121 case PARA_REG_CTR: 122 val |= 0xc0; 123 if ((val & PARA_CTR_INIT) == 0 ) { 124 s->status = PARA_STS_BUSY; 125 s->status |= PARA_STS_ACK; 126 s->status |= PARA_STS_ONLINE; 127 s->status |= PARA_STS_ERROR; 128 } 129 else if (val & PARA_CTR_SELECT) { 130 if (val & PARA_CTR_STROBE) { 131 s->status &= ~PARA_STS_BUSY; 132 if ((s->control & PARA_CTR_STROBE) == 0) 133 /* XXX this blocks entire thread. Rewrite to use 134 * qemu_chr_fe_write and background I/O callbacks */ 135 qemu_chr_fe_write_all(&s->chr, &s->dataw, 1); 136 } else { 137 if (s->control & PARA_CTR_INTEN) { 138 s->irq_pending = 1; 139 } 140 } 141 } 142 parallel_update_irq(s); 143 s->control = val; 144 break; 145 } 146 } 147 148 static void parallel_ioport_write_hw(void *opaque, uint32_t addr, uint32_t val) 149 { 150 ParallelState *s = opaque; 151 uint8_t parm = val; 152 int dir; 153 154 /* Sometimes programs do several writes for timing purposes on old 155 HW. Take care not to waste time on writes that do nothing. */ 156 157 s->last_read_offset = ~0U; 158 159 addr &= 7; 160 switch(addr) { 161 case PARA_REG_DATA: 162 if (s->dataw == val) 163 return; 164 pdebug("wd%02x\n", val); 165 qemu_chr_fe_ioctl(&s->chr, CHR_IOCTL_PP_WRITE_DATA, &parm); 166 s->dataw = val; 167 break; 168 case PARA_REG_STS: 169 pdebug("ws%02x\n", val); 170 if (val & PARA_STS_TMOUT) 171 s->epp_timeout = 0; 172 break; 173 case PARA_REG_CTR: 174 val |= 0xc0; 175 if (s->control == val) 176 return; 177 pdebug("wc%02x\n", val); 178 179 if ((val & PARA_CTR_DIR) != (s->control & PARA_CTR_DIR)) { 180 if (val & PARA_CTR_DIR) { 181 dir = 1; 182 } else { 183 dir = 0; 184 } 185 qemu_chr_fe_ioctl(&s->chr, CHR_IOCTL_PP_DATA_DIR, &dir); 186 parm &= ~PARA_CTR_DIR; 187 } 188 189 qemu_chr_fe_ioctl(&s->chr, CHR_IOCTL_PP_WRITE_CONTROL, &parm); 190 s->control = val; 191 break; 192 case PARA_REG_EPP_ADDR: 193 if ((s->control & (PARA_CTR_DIR|PARA_CTR_SIGNAL)) != PARA_CTR_INIT) 194 /* Controls not correct for EPP address cycle, so do nothing */ 195 pdebug("wa%02x s\n", val); 196 else { 197 struct ParallelIOArg ioarg = { .buffer = &parm, .count = 1 }; 198 if (qemu_chr_fe_ioctl(&s->chr, 199 CHR_IOCTL_PP_EPP_WRITE_ADDR, &ioarg)) { 200 s->epp_timeout = 1; 201 pdebug("wa%02x t\n", val); 202 } 203 else 204 pdebug("wa%02x\n", val); 205 } 206 break; 207 case PARA_REG_EPP_DATA: 208 if ((s->control & (PARA_CTR_DIR|PARA_CTR_SIGNAL)) != PARA_CTR_INIT) 209 /* Controls not correct for EPP data cycle, so do nothing */ 210 pdebug("we%02x s\n", val); 211 else { 212 struct ParallelIOArg ioarg = { .buffer = &parm, .count = 1 }; 213 if (qemu_chr_fe_ioctl(&s->chr, CHR_IOCTL_PP_EPP_WRITE, &ioarg)) { 214 s->epp_timeout = 1; 215 pdebug("we%02x t\n", val); 216 } 217 else 218 pdebug("we%02x\n", val); 219 } 220 break; 221 } 222 } 223 224 static void 225 parallel_ioport_eppdata_write_hw2(void *opaque, uint32_t addr, uint32_t val) 226 { 227 ParallelState *s = opaque; 228 uint16_t eppdata = cpu_to_le16(val); 229 int err; 230 struct ParallelIOArg ioarg = { 231 .buffer = &eppdata, .count = sizeof(eppdata) 232 }; 233 if ((s->control & (PARA_CTR_DIR|PARA_CTR_SIGNAL)) != PARA_CTR_INIT) { 234 /* Controls not correct for EPP data cycle, so do nothing */ 235 pdebug("we%04x s\n", val); 236 return; 237 } 238 err = qemu_chr_fe_ioctl(&s->chr, CHR_IOCTL_PP_EPP_WRITE, &ioarg); 239 if (err) { 240 s->epp_timeout = 1; 241 pdebug("we%04x t\n", val); 242 } 243 else 244 pdebug("we%04x\n", val); 245 } 246 247 static void 248 parallel_ioport_eppdata_write_hw4(void *opaque, uint32_t addr, uint32_t val) 249 { 250 ParallelState *s = opaque; 251 uint32_t eppdata = cpu_to_le32(val); 252 int err; 253 struct ParallelIOArg ioarg = { 254 .buffer = &eppdata, .count = sizeof(eppdata) 255 }; 256 if ((s->control & (PARA_CTR_DIR|PARA_CTR_SIGNAL)) != PARA_CTR_INIT) { 257 /* Controls not correct for EPP data cycle, so do nothing */ 258 pdebug("we%08x s\n", val); 259 return; 260 } 261 err = qemu_chr_fe_ioctl(&s->chr, CHR_IOCTL_PP_EPP_WRITE, &ioarg); 262 if (err) { 263 s->epp_timeout = 1; 264 pdebug("we%08x t\n", val); 265 } 266 else 267 pdebug("we%08x\n", val); 268 } 269 270 static uint32_t parallel_ioport_read_sw(void *opaque, uint32_t addr) 271 { 272 ParallelState *s = opaque; 273 uint32_t ret = 0xff; 274 275 addr &= 7; 276 switch(addr) { 277 case PARA_REG_DATA: 278 if (s->control & PARA_CTR_DIR) 279 ret = s->datar; 280 else 281 ret = s->dataw; 282 break; 283 case PARA_REG_STS: 284 ret = s->status; 285 s->irq_pending = 0; 286 if ((s->status & PARA_STS_BUSY) == 0 && (s->control & PARA_CTR_STROBE) == 0) { 287 /* XXX Fixme: wait 5 microseconds */ 288 if (s->status & PARA_STS_ACK) 289 s->status &= ~PARA_STS_ACK; 290 else { 291 /* XXX Fixme: wait 5 microseconds */ 292 s->status |= PARA_STS_ACK; 293 s->status |= PARA_STS_BUSY; 294 } 295 } 296 parallel_update_irq(s); 297 break; 298 case PARA_REG_CTR: 299 ret = s->control; 300 break; 301 } 302 pdebug("read addr=0x%02x val=0x%02x\n", addr, ret); 303 return ret; 304 } 305 306 static uint32_t parallel_ioport_read_hw(void *opaque, uint32_t addr) 307 { 308 ParallelState *s = opaque; 309 uint8_t ret = 0xff; 310 addr &= 7; 311 switch(addr) { 312 case PARA_REG_DATA: 313 qemu_chr_fe_ioctl(&s->chr, CHR_IOCTL_PP_READ_DATA, &ret); 314 if (s->last_read_offset != addr || s->datar != ret) 315 pdebug("rd%02x\n", ret); 316 s->datar = ret; 317 break; 318 case PARA_REG_STS: 319 qemu_chr_fe_ioctl(&s->chr, CHR_IOCTL_PP_READ_STATUS, &ret); 320 ret &= ~PARA_STS_TMOUT; 321 if (s->epp_timeout) 322 ret |= PARA_STS_TMOUT; 323 if (s->last_read_offset != addr || s->status != ret) 324 pdebug("rs%02x\n", ret); 325 s->status = ret; 326 break; 327 case PARA_REG_CTR: 328 /* s->control has some bits fixed to 1. It is zero only when 329 it has not been yet written to. */ 330 if (s->control == 0) { 331 qemu_chr_fe_ioctl(&s->chr, CHR_IOCTL_PP_READ_CONTROL, &ret); 332 if (s->last_read_offset != addr) 333 pdebug("rc%02x\n", ret); 334 s->control = ret; 335 } 336 else { 337 ret = s->control; 338 if (s->last_read_offset != addr) 339 pdebug("rc%02x\n", ret); 340 } 341 break; 342 case PARA_REG_EPP_ADDR: 343 if ((s->control & (PARA_CTR_DIR | PARA_CTR_SIGNAL)) != 344 (PARA_CTR_DIR | PARA_CTR_INIT)) 345 /* Controls not correct for EPP addr cycle, so do nothing */ 346 pdebug("ra%02x s\n", ret); 347 else { 348 struct ParallelIOArg ioarg = { .buffer = &ret, .count = 1 }; 349 if (qemu_chr_fe_ioctl(&s->chr, 350 CHR_IOCTL_PP_EPP_READ_ADDR, &ioarg)) { 351 s->epp_timeout = 1; 352 pdebug("ra%02x t\n", ret); 353 } 354 else 355 pdebug("ra%02x\n", ret); 356 } 357 break; 358 case PARA_REG_EPP_DATA: 359 if ((s->control & (PARA_CTR_DIR | PARA_CTR_SIGNAL)) != 360 (PARA_CTR_DIR | PARA_CTR_INIT)) 361 /* Controls not correct for EPP data cycle, so do nothing */ 362 pdebug("re%02x s\n", ret); 363 else { 364 struct ParallelIOArg ioarg = { .buffer = &ret, .count = 1 }; 365 if (qemu_chr_fe_ioctl(&s->chr, CHR_IOCTL_PP_EPP_READ, &ioarg)) { 366 s->epp_timeout = 1; 367 pdebug("re%02x t\n", ret); 368 } 369 else 370 pdebug("re%02x\n", ret); 371 } 372 break; 373 } 374 s->last_read_offset = addr; 375 return ret; 376 } 377 378 static uint32_t 379 parallel_ioport_eppdata_read_hw2(void *opaque, uint32_t addr) 380 { 381 ParallelState *s = opaque; 382 uint32_t ret; 383 uint16_t eppdata = ~0; 384 int err; 385 struct ParallelIOArg ioarg = { 386 .buffer = &eppdata, .count = sizeof(eppdata) 387 }; 388 if ((s->control & (PARA_CTR_DIR|PARA_CTR_SIGNAL)) != (PARA_CTR_DIR|PARA_CTR_INIT)) { 389 /* Controls not correct for EPP data cycle, so do nothing */ 390 pdebug("re%04x s\n", eppdata); 391 return eppdata; 392 } 393 err = qemu_chr_fe_ioctl(&s->chr, CHR_IOCTL_PP_EPP_READ, &ioarg); 394 ret = le16_to_cpu(eppdata); 395 396 if (err) { 397 s->epp_timeout = 1; 398 pdebug("re%04x t\n", ret); 399 } 400 else 401 pdebug("re%04x\n", ret); 402 return ret; 403 } 404 405 static uint32_t 406 parallel_ioport_eppdata_read_hw4(void *opaque, uint32_t addr) 407 { 408 ParallelState *s = opaque; 409 uint32_t ret; 410 uint32_t eppdata = ~0U; 411 int err; 412 struct ParallelIOArg ioarg = { 413 .buffer = &eppdata, .count = sizeof(eppdata) 414 }; 415 if ((s->control & (PARA_CTR_DIR|PARA_CTR_SIGNAL)) != (PARA_CTR_DIR|PARA_CTR_INIT)) { 416 /* Controls not correct for EPP data cycle, so do nothing */ 417 pdebug("re%08x s\n", eppdata); 418 return eppdata; 419 } 420 err = qemu_chr_fe_ioctl(&s->chr, CHR_IOCTL_PP_EPP_READ, &ioarg); 421 ret = le32_to_cpu(eppdata); 422 423 if (err) { 424 s->epp_timeout = 1; 425 pdebug("re%08x t\n", ret); 426 } 427 else 428 pdebug("re%08x\n", ret); 429 return ret; 430 } 431 432 static void parallel_ioport_ecp_write(void *opaque, uint32_t addr, uint32_t val) 433 { 434 pdebug("wecp%d=%02x\n", addr & 7, val); 435 } 436 437 static uint32_t parallel_ioport_ecp_read(void *opaque, uint32_t addr) 438 { 439 uint8_t ret = 0xff; 440 441 pdebug("recp%d:%02x\n", addr & 7, ret); 442 return ret; 443 } 444 445 static void parallel_reset(void *opaque) 446 { 447 ParallelState *s = opaque; 448 449 s->datar = ~0; 450 s->dataw = ~0; 451 s->status = PARA_STS_BUSY; 452 s->status |= PARA_STS_ACK; 453 s->status |= PARA_STS_ONLINE; 454 s->status |= PARA_STS_ERROR; 455 s->status |= PARA_STS_TMOUT; 456 s->control = PARA_CTR_SELECT; 457 s->control |= PARA_CTR_INIT; 458 s->control |= 0xc0; 459 s->irq_pending = 0; 460 s->hw_driver = 0; 461 s->epp_timeout = 0; 462 s->last_read_offset = ~0U; 463 } 464 465 static const int isa_parallel_io[MAX_PARALLEL_PORTS] = { 0x378, 0x278, 0x3bc }; 466 467 static const MemoryRegionPortio isa_parallel_portio_hw_list[] = { 468 { 0, 8, 1, 469 .read = parallel_ioport_read_hw, 470 .write = parallel_ioport_write_hw }, 471 { 4, 1, 2, 472 .read = parallel_ioport_eppdata_read_hw2, 473 .write = parallel_ioport_eppdata_write_hw2 }, 474 { 4, 1, 4, 475 .read = parallel_ioport_eppdata_read_hw4, 476 .write = parallel_ioport_eppdata_write_hw4 }, 477 { 0x400, 8, 1, 478 .read = parallel_ioport_ecp_read, 479 .write = parallel_ioport_ecp_write }, 480 PORTIO_END_OF_LIST(), 481 }; 482 483 static const MemoryRegionPortio isa_parallel_portio_sw_list[] = { 484 { 0, 8, 1, 485 .read = parallel_ioport_read_sw, 486 .write = parallel_ioport_write_sw }, 487 PORTIO_END_OF_LIST(), 488 }; 489 490 491 static const VMStateDescription vmstate_parallel_isa = { 492 .name = "parallel_isa", 493 .version_id = 1, 494 .minimum_version_id = 1, 495 .fields = (VMStateField[]) { 496 VMSTATE_UINT8(state.dataw, ISAParallelState), 497 VMSTATE_UINT8(state.datar, ISAParallelState), 498 VMSTATE_UINT8(state.status, ISAParallelState), 499 VMSTATE_UINT8(state.control, ISAParallelState), 500 VMSTATE_INT32(state.irq_pending, ISAParallelState), 501 VMSTATE_INT32(state.epp_timeout, ISAParallelState), 502 VMSTATE_END_OF_LIST() 503 } 504 }; 505 506 static int parallel_can_receive(void *opaque) 507 { 508 return 1; 509 } 510 511 static void parallel_isa_realizefn(DeviceState *dev, Error **errp) 512 { 513 static int index; 514 ISADevice *isadev = ISA_DEVICE(dev); 515 ISAParallelState *isa = ISA_PARALLEL(dev); 516 ParallelState *s = &isa->state; 517 int base; 518 uint8_t dummy; 519 520 if (!qemu_chr_fe_backend_connected(&s->chr)) { 521 error_setg(errp, "Can't create parallel device, empty char device"); 522 return; 523 } 524 525 if (isa->index == -1) { 526 isa->index = index; 527 } 528 if (isa->index >= MAX_PARALLEL_PORTS) { 529 error_setg(errp, "Max. supported number of parallel ports is %d.", 530 MAX_PARALLEL_PORTS); 531 return; 532 } 533 if (isa->iobase == -1) { 534 isa->iobase = isa_parallel_io[isa->index]; 535 } 536 index++; 537 538 base = isa->iobase; 539 isa_init_irq(isadev, &s->irq, isa->isairq); 540 qemu_register_reset(parallel_reset, s); 541 542 qemu_chr_fe_set_handlers(&s->chr, parallel_can_receive, NULL, 543 NULL, NULL, s, NULL, true); 544 if (qemu_chr_fe_ioctl(&s->chr, CHR_IOCTL_PP_READ_STATUS, &dummy) == 0) { 545 s->hw_driver = 1; 546 s->status = dummy; 547 } 548 549 isa_register_portio_list(isadev, &s->portio_list, base, 550 (s->hw_driver 551 ? &isa_parallel_portio_hw_list[0] 552 : &isa_parallel_portio_sw_list[0]), 553 s, "parallel"); 554 } 555 556 /* Memory mapped interface */ 557 static uint32_t parallel_mm_readb (void *opaque, hwaddr addr) 558 { 559 ParallelState *s = opaque; 560 561 return parallel_ioport_read_sw(s, addr >> s->it_shift) & 0xFF; 562 } 563 564 static void parallel_mm_writeb (void *opaque, 565 hwaddr addr, uint32_t value) 566 { 567 ParallelState *s = opaque; 568 569 parallel_ioport_write_sw(s, addr >> s->it_shift, value & 0xFF); 570 } 571 572 static uint32_t parallel_mm_readw (void *opaque, hwaddr addr) 573 { 574 ParallelState *s = opaque; 575 576 return parallel_ioport_read_sw(s, addr >> s->it_shift) & 0xFFFF; 577 } 578 579 static void parallel_mm_writew (void *opaque, 580 hwaddr addr, uint32_t value) 581 { 582 ParallelState *s = opaque; 583 584 parallel_ioport_write_sw(s, addr >> s->it_shift, value & 0xFFFF); 585 } 586 587 static uint32_t parallel_mm_readl (void *opaque, hwaddr addr) 588 { 589 ParallelState *s = opaque; 590 591 return parallel_ioport_read_sw(s, addr >> s->it_shift); 592 } 593 594 static void parallel_mm_writel (void *opaque, 595 hwaddr addr, uint32_t value) 596 { 597 ParallelState *s = opaque; 598 599 parallel_ioport_write_sw(s, addr >> s->it_shift, value); 600 } 601 602 static const MemoryRegionOps parallel_mm_ops = { 603 .old_mmio = { 604 .read = { parallel_mm_readb, parallel_mm_readw, parallel_mm_readl }, 605 .write = { parallel_mm_writeb, parallel_mm_writew, parallel_mm_writel }, 606 }, 607 .endianness = DEVICE_NATIVE_ENDIAN, 608 }; 609 610 /* If fd is zero, it means that the parallel device uses the console */ 611 bool parallel_mm_init(MemoryRegion *address_space, 612 hwaddr base, int it_shift, qemu_irq irq, 613 Chardev *chr) 614 { 615 ParallelState *s; 616 617 s = g_malloc0(sizeof(ParallelState)); 618 s->irq = irq; 619 qemu_chr_fe_init(&s->chr, chr, &error_abort); 620 s->it_shift = it_shift; 621 qemu_register_reset(parallel_reset, s); 622 623 memory_region_init_io(&s->iomem, NULL, ¶llel_mm_ops, s, 624 "parallel", 8 << it_shift); 625 memory_region_add_subregion(address_space, base, &s->iomem); 626 return true; 627 } 628 629 static Property parallel_isa_properties[] = { 630 DEFINE_PROP_UINT32("index", ISAParallelState, index, -1), 631 DEFINE_PROP_UINT32("iobase", ISAParallelState, iobase, -1), 632 DEFINE_PROP_UINT32("irq", ISAParallelState, isairq, 7), 633 DEFINE_PROP_CHR("chardev", ISAParallelState, state.chr), 634 DEFINE_PROP_END_OF_LIST(), 635 }; 636 637 static void parallel_isa_class_initfn(ObjectClass *klass, void *data) 638 { 639 DeviceClass *dc = DEVICE_CLASS(klass); 640 641 dc->realize = parallel_isa_realizefn; 642 dc->vmsd = &vmstate_parallel_isa; 643 dc->props = parallel_isa_properties; 644 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 645 } 646 647 static const TypeInfo parallel_isa_info = { 648 .name = TYPE_ISA_PARALLEL, 649 .parent = TYPE_ISA_DEVICE, 650 .instance_size = sizeof(ISAParallelState), 651 .class_init = parallel_isa_class_initfn, 652 }; 653 654 static void parallel_register_types(void) 655 { 656 type_register_static(¶llel_isa_info); 657 } 658 659 type_init(parallel_register_types) 660