1 /* 2 * drivers/s390/char/raw3270.c 3 * IBM/3270 Driver - core functions. 4 * 5 * Author(s): 6 * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global) 7 * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com> 8 * -- Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation 9 */ 10 11 #include <linux/bootmem.h> 12 #include <linux/module.h> 13 #include <linux/err.h> 14 #include <linux/init.h> 15 #include <linux/interrupt.h> 16 #include <linux/list.h> 17 #include <linux/slab.h> 18 #include <linux/types.h> 19 #include <linux/wait.h> 20 21 #include <asm/ccwdev.h> 22 #include <asm/cio.h> 23 #include <asm/ebcdic.h> 24 #include <asm/diag.h> 25 26 #include "raw3270.h" 27 28 #include <linux/major.h> 29 #include <linux/kdev_t.h> 30 #include <linux/device.h> 31 #include <linux/mutex.h> 32 33 static struct class *class3270; 34 35 /* The main 3270 data structure. */ 36 struct raw3270 { 37 struct list_head list; 38 struct ccw_device *cdev; 39 int minor; 40 41 short model, rows, cols; 42 unsigned long flags; 43 44 struct list_head req_queue; /* Request queue. */ 45 struct list_head view_list; /* List of available views. */ 46 struct raw3270_view *view; /* Active view. */ 47 48 struct timer_list timer; /* Device timer. */ 49 50 unsigned char *ascebc; /* ascii -> ebcdic table */ 51 struct device *clttydev; /* 3270-class tty device ptr */ 52 struct device *cltubdev; /* 3270-class tub device ptr */ 53 54 struct raw3270_request init_request; 55 unsigned char init_data[256]; 56 }; 57 58 /* raw3270->flags */ 59 #define RAW3270_FLAGS_14BITADDR 0 /* 14-bit buffer addresses */ 60 #define RAW3270_FLAGS_BUSY 1 /* Device busy, leave it alone */ 61 #define RAW3270_FLAGS_ATTN 2 /* Device sent an ATTN interrupt */ 62 #define RAW3270_FLAGS_READY 4 /* Device is useable by views */ 63 #define RAW3270_FLAGS_CONSOLE 8 /* Device is the console. */ 64 65 /* Semaphore to protect global data of raw3270 (devices, views, etc). */ 66 static DEFINE_MUTEX(raw3270_mutex); 67 68 /* List of 3270 devices. */ 69 static LIST_HEAD(raw3270_devices); 70 71 /* 72 * Flag to indicate if the driver has been registered. Some operations 73 * like waiting for the end of i/o need to be done differently as long 74 * as the kernel is still starting up (console support). 75 */ 76 static int raw3270_registered; 77 78 /* Module parameters */ 79 static int tubxcorrect = 0; 80 module_param(tubxcorrect, bool, 0); 81 82 /* 83 * Wait queue for device init/delete, view delete. 84 */ 85 DECLARE_WAIT_QUEUE_HEAD(raw3270_wait_queue); 86 87 /* 88 * Encode array for 12 bit 3270 addresses. 89 */ 90 static unsigned char raw3270_ebcgraf[64] = { 91 0x40, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 92 0xc8, 0xc9, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 93 0x50, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 94 0xd8, 0xd9, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 95 0x60, 0x61, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 96 0xe8, 0xe9, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 97 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 98 0xf8, 0xf9, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f 99 }; 100 101 void 102 raw3270_buffer_address(struct raw3270 *rp, char *cp, unsigned short addr) 103 { 104 if (test_bit(RAW3270_FLAGS_14BITADDR, &rp->flags)) { 105 cp[0] = (addr >> 8) & 0x3f; 106 cp[1] = addr & 0xff; 107 } else { 108 cp[0] = raw3270_ebcgraf[(addr >> 6) & 0x3f]; 109 cp[1] = raw3270_ebcgraf[addr & 0x3f]; 110 } 111 } 112 113 /* 114 * Allocate a new 3270 ccw request 115 */ 116 struct raw3270_request * 117 raw3270_request_alloc(size_t size) 118 { 119 struct raw3270_request *rq; 120 121 /* Allocate request structure */ 122 rq = kzalloc(sizeof(struct raw3270_request), GFP_KERNEL | GFP_DMA); 123 if (!rq) 124 return ERR_PTR(-ENOMEM); 125 126 /* alloc output buffer. */ 127 if (size > 0) { 128 rq->buffer = kmalloc(size, GFP_KERNEL | GFP_DMA); 129 if (!rq->buffer) { 130 kfree(rq); 131 return ERR_PTR(-ENOMEM); 132 } 133 } 134 rq->size = size; 135 INIT_LIST_HEAD(&rq->list); 136 137 /* 138 * Setup ccw. 139 */ 140 rq->ccw.cda = __pa(rq->buffer); 141 rq->ccw.flags = CCW_FLAG_SLI; 142 143 return rq; 144 } 145 146 #ifdef CONFIG_TN3270_CONSOLE 147 /* 148 * Allocate a new 3270 ccw request from bootmem. Only works very 149 * early in the boot process. Only con3270.c should be using this. 150 */ 151 struct raw3270_request __init *raw3270_request_alloc_bootmem(size_t size) 152 { 153 struct raw3270_request *rq; 154 155 rq = alloc_bootmem_low(sizeof(struct raw3270)); 156 if (!rq) 157 return ERR_PTR(-ENOMEM); 158 memset(rq, 0, sizeof(struct raw3270_request)); 159 160 /* alloc output buffer. */ 161 if (size > 0) { 162 rq->buffer = alloc_bootmem_low(size); 163 if (!rq->buffer) { 164 free_bootmem((unsigned long) rq, 165 sizeof(struct raw3270)); 166 return ERR_PTR(-ENOMEM); 167 } 168 } 169 rq->size = size; 170 INIT_LIST_HEAD(&rq->list); 171 172 /* 173 * Setup ccw. 174 */ 175 rq->ccw.cda = __pa(rq->buffer); 176 rq->ccw.flags = CCW_FLAG_SLI; 177 178 return rq; 179 } 180 #endif 181 182 /* 183 * Free 3270 ccw request 184 */ 185 void 186 raw3270_request_free (struct raw3270_request *rq) 187 { 188 kfree(rq->buffer); 189 kfree(rq); 190 } 191 192 /* 193 * Reset request to initial state. 194 */ 195 void 196 raw3270_request_reset(struct raw3270_request *rq) 197 { 198 BUG_ON(!list_empty(&rq->list)); 199 rq->ccw.cmd_code = 0; 200 rq->ccw.count = 0; 201 rq->ccw.cda = __pa(rq->buffer); 202 rq->ccw.flags = CCW_FLAG_SLI; 203 rq->rescnt = 0; 204 rq->rc = 0; 205 } 206 207 /* 208 * Set command code to ccw of a request. 209 */ 210 void 211 raw3270_request_set_cmd(struct raw3270_request *rq, u8 cmd) 212 { 213 rq->ccw.cmd_code = cmd; 214 } 215 216 /* 217 * Add data fragment to output buffer. 218 */ 219 int 220 raw3270_request_add_data(struct raw3270_request *rq, void *data, size_t size) 221 { 222 if (size + rq->ccw.count > rq->size) 223 return -E2BIG; 224 memcpy(rq->buffer + rq->ccw.count, data, size); 225 rq->ccw.count += size; 226 return 0; 227 } 228 229 /* 230 * Set address/length pair to ccw of a request. 231 */ 232 void 233 raw3270_request_set_data(struct raw3270_request *rq, void *data, size_t size) 234 { 235 rq->ccw.cda = __pa(data); 236 rq->ccw.count = size; 237 } 238 239 /* 240 * Set idal buffer to ccw of a request. 241 */ 242 void 243 raw3270_request_set_idal(struct raw3270_request *rq, struct idal_buffer *ib) 244 { 245 rq->ccw.cda = __pa(ib->data); 246 rq->ccw.count = ib->size; 247 rq->ccw.flags |= CCW_FLAG_IDA; 248 } 249 250 /* 251 * Stop running ccw. 252 */ 253 static int 254 raw3270_halt_io_nolock(struct raw3270 *rp, struct raw3270_request *rq) 255 { 256 int retries; 257 int rc; 258 259 if (raw3270_request_final(rq)) 260 return 0; 261 /* Check if interrupt has already been processed */ 262 for (retries = 0; retries < 5; retries++) { 263 if (retries < 2) 264 rc = ccw_device_halt(rp->cdev, (long) rq); 265 else 266 rc = ccw_device_clear(rp->cdev, (long) rq); 267 if (rc == 0) 268 break; /* termination successful */ 269 } 270 return rc; 271 } 272 273 static int 274 raw3270_halt_io(struct raw3270 *rp, struct raw3270_request *rq) 275 { 276 unsigned long flags; 277 int rc; 278 279 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 280 rc = raw3270_halt_io_nolock(rp, rq); 281 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 282 return rc; 283 } 284 285 /* 286 * Add the request to the request queue, try to start it if the 287 * 3270 device is idle. Return without waiting for end of i/o. 288 */ 289 static int 290 __raw3270_start(struct raw3270 *rp, struct raw3270_view *view, 291 struct raw3270_request *rq) 292 { 293 rq->view = view; 294 raw3270_get_view(view); 295 if (list_empty(&rp->req_queue) && 296 !test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) { 297 /* No other requests are on the queue. Start this one. */ 298 rq->rc = ccw_device_start(rp->cdev, &rq->ccw, 299 (unsigned long) rq, 0, 0); 300 if (rq->rc) { 301 raw3270_put_view(view); 302 return rq->rc; 303 } 304 } 305 list_add_tail(&rq->list, &rp->req_queue); 306 return 0; 307 } 308 309 int 310 raw3270_start(struct raw3270_view *view, struct raw3270_request *rq) 311 { 312 unsigned long flags; 313 struct raw3270 *rp; 314 int rc; 315 316 spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); 317 rp = view->dev; 318 if (!rp || rp->view != view) 319 rc = -EACCES; 320 else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) 321 rc = -ENODEV; 322 else 323 rc = __raw3270_start(rp, view, rq); 324 spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); 325 return rc; 326 } 327 328 int 329 raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq) 330 { 331 struct raw3270 *rp; 332 int rc; 333 334 rp = view->dev; 335 if (!rp || rp->view != view) 336 rc = -EACCES; 337 else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) 338 rc = -ENODEV; 339 else 340 rc = __raw3270_start(rp, view, rq); 341 return rc; 342 } 343 344 int 345 raw3270_start_irq(struct raw3270_view *view, struct raw3270_request *rq) 346 { 347 struct raw3270 *rp; 348 349 rp = view->dev; 350 rq->view = view; 351 raw3270_get_view(view); 352 list_add_tail(&rq->list, &rp->req_queue); 353 return 0; 354 } 355 356 /* 357 * 3270 interrupt routine, called from the ccw_device layer 358 */ 359 static void 360 raw3270_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb) 361 { 362 struct raw3270 *rp; 363 struct raw3270_view *view; 364 struct raw3270_request *rq; 365 int rc; 366 367 rp = (struct raw3270 *) cdev->dev.driver_data; 368 if (!rp) 369 return; 370 rq = (struct raw3270_request *) intparm; 371 view = rq ? rq->view : rp->view; 372 373 if (IS_ERR(irb)) 374 rc = RAW3270_IO_RETRY; 375 else if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) { 376 rq->rc = -EIO; 377 rc = RAW3270_IO_DONE; 378 } else if (irb->scsw.cmd.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END | 379 DEV_STAT_UNIT_EXCEP)) { 380 /* Handle CE-DE-UE and subsequent UDE */ 381 set_bit(RAW3270_FLAGS_BUSY, &rp->flags); 382 rc = RAW3270_IO_BUSY; 383 } else if (test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) { 384 /* Wait for UDE if busy flag is set. */ 385 if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { 386 clear_bit(RAW3270_FLAGS_BUSY, &rp->flags); 387 /* Got it, now retry. */ 388 rc = RAW3270_IO_RETRY; 389 } else 390 rc = RAW3270_IO_BUSY; 391 } else if (view) 392 rc = view->fn->intv(view, rq, irb); 393 else 394 rc = RAW3270_IO_DONE; 395 396 switch (rc) { 397 case RAW3270_IO_DONE: 398 break; 399 case RAW3270_IO_BUSY: 400 /* 401 * Intervention required by the operator. We have to wait 402 * for unsolicited device end. 403 */ 404 return; 405 case RAW3270_IO_RETRY: 406 if (!rq) 407 break; 408 rq->rc = ccw_device_start(rp->cdev, &rq->ccw, 409 (unsigned long) rq, 0, 0); 410 if (rq->rc == 0) 411 return; /* Sucessfully restarted. */ 412 break; 413 case RAW3270_IO_STOP: 414 if (!rq) 415 break; 416 raw3270_halt_io_nolock(rp, rq); 417 rq->rc = -EIO; 418 break; 419 default: 420 BUG(); 421 } 422 if (rq) { 423 BUG_ON(list_empty(&rq->list)); 424 /* The request completed, remove from queue and do callback. */ 425 list_del_init(&rq->list); 426 if (rq->callback) 427 rq->callback(rq, rq->callback_data); 428 /* Do put_device for get_device in raw3270_start. */ 429 raw3270_put_view(view); 430 } 431 /* 432 * Try to start each request on request queue until one is 433 * started successful. 434 */ 435 while (!list_empty(&rp->req_queue)) { 436 rq = list_entry(rp->req_queue.next,struct raw3270_request,list); 437 rq->rc = ccw_device_start(rp->cdev, &rq->ccw, 438 (unsigned long) rq, 0, 0); 439 if (rq->rc == 0) 440 break; 441 /* Start failed. Remove request and do callback. */ 442 list_del_init(&rq->list); 443 if (rq->callback) 444 rq->callback(rq, rq->callback_data); 445 /* Do put_device for get_device in raw3270_start. */ 446 raw3270_put_view(view); 447 } 448 } 449 450 /* 451 * Size sensing. 452 */ 453 454 struct raw3270_ua { /* Query Reply structure for Usable Area */ 455 struct { /* Usable Area Query Reply Base */ 456 short l; /* Length of this structured field */ 457 char sfid; /* 0x81 if Query Reply */ 458 char qcode; /* 0x81 if Usable Area */ 459 char flags0; 460 char flags1; 461 short w; /* Width of usable area */ 462 short h; /* Heigth of usavle area */ 463 char units; /* 0x00:in; 0x01:mm */ 464 int xr; 465 int yr; 466 char aw; 467 char ah; 468 short buffsz; /* Character buffer size, bytes */ 469 char xmin; 470 char ymin; 471 char xmax; 472 char ymax; 473 } __attribute__ ((packed)) uab; 474 struct { /* Alternate Usable Area Self-Defining Parameter */ 475 char l; /* Length of this Self-Defining Parm */ 476 char sdpid; /* 0x02 if Alternate Usable Area */ 477 char res; 478 char auaid; /* 0x01 is Id for the A U A */ 479 short wauai; /* Width of AUAi */ 480 short hauai; /* Height of AUAi */ 481 char auaunits; /* 0x00:in, 0x01:mm */ 482 int auaxr; 483 int auayr; 484 char awauai; 485 char ahauai; 486 } __attribute__ ((packed)) aua; 487 } __attribute__ ((packed)); 488 489 static struct diag210 raw3270_init_diag210; 490 static DEFINE_MUTEX(raw3270_init_mutex); 491 492 static int 493 raw3270_init_irq(struct raw3270_view *view, struct raw3270_request *rq, 494 struct irb *irb) 495 { 496 /* 497 * Unit-Check Processing: 498 * Expect Command Reject or Intervention Required. 499 */ 500 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { 501 /* Request finished abnormally. */ 502 if (irb->ecw[0] & SNS0_INTERVENTION_REQ) { 503 set_bit(RAW3270_FLAGS_BUSY, &view->dev->flags); 504 return RAW3270_IO_BUSY; 505 } 506 } 507 if (rq) { 508 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { 509 if (irb->ecw[0] & SNS0_CMD_REJECT) 510 rq->rc = -EOPNOTSUPP; 511 else 512 rq->rc = -EIO; 513 } else 514 /* Request finished normally. Copy residual count. */ 515 rq->rescnt = irb->scsw.cmd.count; 516 } 517 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 518 set_bit(RAW3270_FLAGS_ATTN, &view->dev->flags); 519 wake_up(&raw3270_wait_queue); 520 } 521 return RAW3270_IO_DONE; 522 } 523 524 static struct raw3270_fn raw3270_init_fn = { 525 .intv = raw3270_init_irq 526 }; 527 528 static struct raw3270_view raw3270_init_view = { 529 .fn = &raw3270_init_fn 530 }; 531 532 /* 533 * raw3270_wait/raw3270_wait_interruptible/__raw3270_wakeup 534 * Wait for end of request. The request must have been started 535 * with raw3270_start, rc = 0. The device lock may NOT have been 536 * released between calling raw3270_start and raw3270_wait. 537 */ 538 static void 539 raw3270_wake_init(struct raw3270_request *rq, void *data) 540 { 541 wake_up((wait_queue_head_t *) data); 542 } 543 544 /* 545 * Special wait function that can cope with console initialization. 546 */ 547 static int 548 raw3270_start_init(struct raw3270 *rp, struct raw3270_view *view, 549 struct raw3270_request *rq) 550 { 551 unsigned long flags; 552 int rc; 553 554 #ifdef CONFIG_TN3270_CONSOLE 555 if (raw3270_registered == 0) { 556 spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); 557 rq->callback = NULL; 558 rc = __raw3270_start(rp, view, rq); 559 if (rc == 0) 560 while (!raw3270_request_final(rq)) { 561 wait_cons_dev(); 562 barrier(); 563 } 564 spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); 565 return rq->rc; 566 } 567 #endif 568 rq->callback = raw3270_wake_init; 569 rq->callback_data = &raw3270_wait_queue; 570 spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); 571 rc = __raw3270_start(rp, view, rq); 572 spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); 573 if (rc) 574 return rc; 575 /* Now wait for the completion. */ 576 rc = wait_event_interruptible(raw3270_wait_queue, 577 raw3270_request_final(rq)); 578 if (rc == -ERESTARTSYS) { /* Interrupted by a signal. */ 579 raw3270_halt_io(view->dev, rq); 580 /* No wait for the halt to complete. */ 581 wait_event(raw3270_wait_queue, raw3270_request_final(rq)); 582 return -ERESTARTSYS; 583 } 584 return rq->rc; 585 } 586 587 static int 588 __raw3270_size_device_vm(struct raw3270 *rp) 589 { 590 int rc, model; 591 struct ccw_dev_id dev_id; 592 593 ccw_device_get_id(rp->cdev, &dev_id); 594 raw3270_init_diag210.vrdcdvno = dev_id.devno; 595 raw3270_init_diag210.vrdclen = sizeof(struct diag210); 596 rc = diag210(&raw3270_init_diag210); 597 if (rc) 598 return rc; 599 model = raw3270_init_diag210.vrdccrmd; 600 switch (model) { 601 case 2: 602 rp->model = model; 603 rp->rows = 24; 604 rp->cols = 80; 605 break; 606 case 3: 607 rp->model = model; 608 rp->rows = 32; 609 rp->cols = 80; 610 break; 611 case 4: 612 rp->model = model; 613 rp->rows = 43; 614 rp->cols = 80; 615 break; 616 case 5: 617 rp->model = model; 618 rp->rows = 27; 619 rp->cols = 132; 620 break; 621 default: 622 printk(KERN_WARNING "vrdccrmd is 0x%.8x\n", model); 623 rc = -EOPNOTSUPP; 624 break; 625 } 626 return rc; 627 } 628 629 static int 630 __raw3270_size_device(struct raw3270 *rp) 631 { 632 static const unsigned char wbuf[] = 633 { 0x00, 0x07, 0x01, 0xff, 0x03, 0x00, 0x81 }; 634 struct raw3270_ua *uap; 635 unsigned short count; 636 int rc; 637 638 /* 639 * To determine the size of the 3270 device we need to do: 640 * 1) send a 'read partition' data stream to the device 641 * 2) wait for the attn interrupt that preceeds the query reply 642 * 3) do a read modified to get the query reply 643 * To make things worse we have to cope with intervention 644 * required (3270 device switched to 'stand-by') and command 645 * rejects (old devices that can't do 'read partition'). 646 */ 647 memset(&rp->init_request, 0, sizeof(rp->init_request)); 648 memset(&rp->init_data, 0, 256); 649 /* Store 'read partition' data stream to init_data */ 650 memcpy(&rp->init_data, wbuf, sizeof(wbuf)); 651 INIT_LIST_HEAD(&rp->init_request.list); 652 rp->init_request.ccw.cmd_code = TC_WRITESF; 653 rp->init_request.ccw.flags = CCW_FLAG_SLI; 654 rp->init_request.ccw.count = sizeof(wbuf); 655 rp->init_request.ccw.cda = (__u32) __pa(&rp->init_data); 656 657 rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); 658 if (rc) 659 /* Check error cases: -ERESTARTSYS, -EIO and -EOPNOTSUPP */ 660 return rc; 661 662 /* Wait for attention interrupt. */ 663 #ifdef CONFIG_TN3270_CONSOLE 664 if (raw3270_registered == 0) { 665 unsigned long flags; 666 667 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 668 while (!test_and_clear_bit(RAW3270_FLAGS_ATTN, &rp->flags)) 669 wait_cons_dev(); 670 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 671 } else 672 #endif 673 rc = wait_event_interruptible(raw3270_wait_queue, 674 test_and_clear_bit(RAW3270_FLAGS_ATTN, &rp->flags)); 675 if (rc) 676 return rc; 677 678 /* 679 * The device accepted the 'read partition' command. Now 680 * set up a read ccw and issue it. 681 */ 682 rp->init_request.ccw.cmd_code = TC_READMOD; 683 rp->init_request.ccw.flags = CCW_FLAG_SLI; 684 rp->init_request.ccw.count = sizeof(rp->init_data); 685 rp->init_request.ccw.cda = (__u32) __pa(rp->init_data); 686 rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); 687 if (rc) 688 return rc; 689 /* Got a Query Reply */ 690 count = sizeof(rp->init_data) - rp->init_request.rescnt; 691 uap = (struct raw3270_ua *) (rp->init_data + 1); 692 /* Paranoia check. */ 693 if (rp->init_data[0] != 0x88 || uap->uab.qcode != 0x81) 694 return -EOPNOTSUPP; 695 /* Copy rows/columns of default Usable Area */ 696 rp->rows = uap->uab.h; 697 rp->cols = uap->uab.w; 698 /* Check for 14 bit addressing */ 699 if ((uap->uab.flags0 & 0x0d) == 0x01) 700 set_bit(RAW3270_FLAGS_14BITADDR, &rp->flags); 701 /* Check for Alternate Usable Area */ 702 if (uap->uab.l == sizeof(struct raw3270_ua) && 703 uap->aua.sdpid == 0x02) { 704 rp->rows = uap->aua.hauai; 705 rp->cols = uap->aua.wauai; 706 } 707 return 0; 708 } 709 710 static int 711 raw3270_size_device(struct raw3270 *rp) 712 { 713 int rc; 714 715 mutex_lock(&raw3270_init_mutex); 716 rp->view = &raw3270_init_view; 717 raw3270_init_view.dev = rp; 718 if (MACHINE_IS_VM) 719 rc = __raw3270_size_device_vm(rp); 720 else 721 rc = __raw3270_size_device(rp); 722 raw3270_init_view.dev = NULL; 723 rp->view = NULL; 724 mutex_unlock(&raw3270_init_mutex); 725 if (rc == 0) { /* Found something. */ 726 /* Try to find a model. */ 727 rp->model = 0; 728 if (rp->rows == 24 && rp->cols == 80) 729 rp->model = 2; 730 if (rp->rows == 32 && rp->cols == 80) 731 rp->model = 3; 732 if (rp->rows == 43 && rp->cols == 80) 733 rp->model = 4; 734 if (rp->rows == 27 && rp->cols == 132) 735 rp->model = 5; 736 } else { 737 /* Couldn't detect size. Use default model 2. */ 738 rp->model = 2; 739 rp->rows = 24; 740 rp->cols = 80; 741 return 0; 742 } 743 return rc; 744 } 745 746 static int 747 raw3270_reset_device(struct raw3270 *rp) 748 { 749 int rc; 750 751 mutex_lock(&raw3270_init_mutex); 752 memset(&rp->init_request, 0, sizeof(rp->init_request)); 753 memset(&rp->init_data, 0, sizeof(rp->init_data)); 754 /* Store reset data stream to init_data/init_request */ 755 rp->init_data[0] = TW_KR; 756 INIT_LIST_HEAD(&rp->init_request.list); 757 rp->init_request.ccw.cmd_code = TC_EWRITEA; 758 rp->init_request.ccw.flags = CCW_FLAG_SLI; 759 rp->init_request.ccw.count = 1; 760 rp->init_request.ccw.cda = (__u32) __pa(rp->init_data); 761 rp->view = &raw3270_init_view; 762 raw3270_init_view.dev = rp; 763 rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); 764 raw3270_init_view.dev = NULL; 765 rp->view = NULL; 766 mutex_unlock(&raw3270_init_mutex); 767 return rc; 768 } 769 770 int 771 raw3270_reset(struct raw3270_view *view) 772 { 773 struct raw3270 *rp; 774 int rc; 775 776 rp = view->dev; 777 if (!rp || rp->view != view) 778 rc = -EACCES; 779 else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) 780 rc = -ENODEV; 781 else 782 rc = raw3270_reset_device(view->dev); 783 return rc; 784 } 785 786 /* 787 * Setup new 3270 device. 788 */ 789 static int 790 raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc) 791 { 792 struct list_head *l; 793 struct raw3270 *tmp; 794 int minor; 795 796 memset(rp, 0, sizeof(struct raw3270)); 797 /* Copy ebcdic -> ascii translation table. */ 798 memcpy(ascebc, _ascebc, 256); 799 if (tubxcorrect) { 800 /* correct brackets and circumflex */ 801 ascebc['['] = 0xad; 802 ascebc[']'] = 0xbd; 803 ascebc['^'] = 0xb0; 804 } 805 rp->ascebc = ascebc; 806 807 /* Set defaults. */ 808 rp->rows = 24; 809 rp->cols = 80; 810 811 INIT_LIST_HEAD(&rp->req_queue); 812 INIT_LIST_HEAD(&rp->view_list); 813 814 /* 815 * Add device to list and find the smallest unused minor 816 * number for it. Note: there is no device with minor 0, 817 * see special case for fs3270.c:fs3270_open(). 818 */ 819 mutex_lock(&raw3270_mutex); 820 /* Keep the list sorted. */ 821 minor = RAW3270_FIRSTMINOR; 822 rp->minor = -1; 823 list_for_each(l, &raw3270_devices) { 824 tmp = list_entry(l, struct raw3270, list); 825 if (tmp->minor > minor) { 826 rp->minor = minor; 827 __list_add(&rp->list, l->prev, l); 828 break; 829 } 830 minor++; 831 } 832 if (rp->minor == -1 && minor < RAW3270_MAXDEVS + RAW3270_FIRSTMINOR) { 833 rp->minor = minor; 834 list_add_tail(&rp->list, &raw3270_devices); 835 } 836 mutex_unlock(&raw3270_mutex); 837 /* No free minor number? Then give up. */ 838 if (rp->minor == -1) 839 return -EUSERS; 840 rp->cdev = cdev; 841 cdev->dev.driver_data = rp; 842 cdev->handler = raw3270_irq; 843 return 0; 844 } 845 846 #ifdef CONFIG_TN3270_CONSOLE 847 /* 848 * Setup 3270 device configured as console. 849 */ 850 struct raw3270 __init *raw3270_setup_console(struct ccw_device *cdev) 851 { 852 struct raw3270 *rp; 853 char *ascebc; 854 int rc; 855 856 rp = (struct raw3270 *) alloc_bootmem_low(sizeof(struct raw3270)); 857 ascebc = (char *) alloc_bootmem(256); 858 rc = raw3270_setup_device(cdev, rp, ascebc); 859 if (rc) 860 return ERR_PTR(rc); 861 set_bit(RAW3270_FLAGS_CONSOLE, &rp->flags); 862 rc = raw3270_reset_device(rp); 863 if (rc) 864 return ERR_PTR(rc); 865 rc = raw3270_size_device(rp); 866 if (rc) 867 return ERR_PTR(rc); 868 rc = raw3270_reset_device(rp); 869 if (rc) 870 return ERR_PTR(rc); 871 set_bit(RAW3270_FLAGS_READY, &rp->flags); 872 return rp; 873 } 874 875 void 876 raw3270_wait_cons_dev(struct raw3270 *rp) 877 { 878 unsigned long flags; 879 880 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 881 wait_cons_dev(); 882 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 883 } 884 885 #endif 886 887 /* 888 * Create a 3270 device structure. 889 */ 890 static struct raw3270 * 891 raw3270_create_device(struct ccw_device *cdev) 892 { 893 struct raw3270 *rp; 894 char *ascebc; 895 int rc; 896 897 rp = kmalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); 898 if (!rp) 899 return ERR_PTR(-ENOMEM); 900 ascebc = kmalloc(256, GFP_KERNEL); 901 if (!ascebc) { 902 kfree(rp); 903 return ERR_PTR(-ENOMEM); 904 } 905 rc = raw3270_setup_device(cdev, rp, ascebc); 906 if (rc) { 907 kfree(rp->ascebc); 908 kfree(rp); 909 rp = ERR_PTR(rc); 910 } 911 /* Get reference to ccw_device structure. */ 912 get_device(&cdev->dev); 913 return rp; 914 } 915 916 /* 917 * Activate a view. 918 */ 919 int 920 raw3270_activate_view(struct raw3270_view *view) 921 { 922 struct raw3270 *rp; 923 struct raw3270_view *oldview, *nv; 924 unsigned long flags; 925 int rc; 926 927 rp = view->dev; 928 if (!rp) 929 return -ENODEV; 930 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 931 if (rp->view == view) 932 rc = 0; 933 else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) 934 rc = -ENODEV; 935 else { 936 oldview = NULL; 937 if (rp->view) { 938 oldview = rp->view; 939 oldview->fn->deactivate(oldview); 940 } 941 rp->view = view; 942 rc = view->fn->activate(view); 943 if (rc) { 944 /* Didn't work. Try to reactivate the old view. */ 945 rp->view = oldview; 946 if (!oldview || oldview->fn->activate(oldview) != 0) { 947 /* Didn't work as well. Try any other view. */ 948 list_for_each_entry(nv, &rp->view_list, list) 949 if (nv != view && nv != oldview) { 950 rp->view = nv; 951 if (nv->fn->activate(nv) == 0) 952 break; 953 rp->view = NULL; 954 } 955 } 956 } 957 } 958 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 959 return rc; 960 } 961 962 /* 963 * Deactivate current view. 964 */ 965 void 966 raw3270_deactivate_view(struct raw3270_view *view) 967 { 968 unsigned long flags; 969 struct raw3270 *rp; 970 971 rp = view->dev; 972 if (!rp) 973 return; 974 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 975 if (rp->view == view) { 976 view->fn->deactivate(view); 977 rp->view = NULL; 978 /* Move deactivated view to end of list. */ 979 list_del_init(&view->list); 980 list_add_tail(&view->list, &rp->view_list); 981 /* Try to activate another view. */ 982 if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) { 983 list_for_each_entry(view, &rp->view_list, list) { 984 rp->view = view; 985 if (view->fn->activate(view) == 0) 986 break; 987 rp->view = NULL; 988 } 989 } 990 } 991 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 992 } 993 994 /* 995 * Add view to device with minor "minor". 996 */ 997 int 998 raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn, int minor) 999 { 1000 unsigned long flags; 1001 struct raw3270 *rp; 1002 int rc; 1003 1004 if (minor <= 0) 1005 return -ENODEV; 1006 mutex_lock(&raw3270_mutex); 1007 rc = -ENODEV; 1008 list_for_each_entry(rp, &raw3270_devices, list) { 1009 if (rp->minor != minor) 1010 continue; 1011 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 1012 if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) { 1013 atomic_set(&view->ref_count, 2); 1014 view->dev = rp; 1015 view->fn = fn; 1016 view->model = rp->model; 1017 view->rows = rp->rows; 1018 view->cols = rp->cols; 1019 view->ascebc = rp->ascebc; 1020 spin_lock_init(&view->lock); 1021 list_add(&view->list, &rp->view_list); 1022 rc = 0; 1023 } 1024 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 1025 break; 1026 } 1027 mutex_unlock(&raw3270_mutex); 1028 return rc; 1029 } 1030 1031 /* 1032 * Find specific view of device with minor "minor". 1033 */ 1034 struct raw3270_view * 1035 raw3270_find_view(struct raw3270_fn *fn, int minor) 1036 { 1037 struct raw3270 *rp; 1038 struct raw3270_view *view, *tmp; 1039 unsigned long flags; 1040 1041 mutex_lock(&raw3270_mutex); 1042 view = ERR_PTR(-ENODEV); 1043 list_for_each_entry(rp, &raw3270_devices, list) { 1044 if (rp->minor != minor) 1045 continue; 1046 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 1047 if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) { 1048 view = ERR_PTR(-ENOENT); 1049 list_for_each_entry(tmp, &rp->view_list, list) { 1050 if (tmp->fn == fn) { 1051 raw3270_get_view(tmp); 1052 view = tmp; 1053 break; 1054 } 1055 } 1056 } 1057 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 1058 break; 1059 } 1060 mutex_unlock(&raw3270_mutex); 1061 return view; 1062 } 1063 1064 /* 1065 * Remove view from device and free view structure via call to view->fn->free. 1066 */ 1067 void 1068 raw3270_del_view(struct raw3270_view *view) 1069 { 1070 unsigned long flags; 1071 struct raw3270 *rp; 1072 struct raw3270_view *nv; 1073 1074 rp = view->dev; 1075 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 1076 if (rp->view == view) { 1077 view->fn->deactivate(view); 1078 rp->view = NULL; 1079 } 1080 list_del_init(&view->list); 1081 if (!rp->view && test_bit(RAW3270_FLAGS_READY, &rp->flags)) { 1082 /* Try to activate another view. */ 1083 list_for_each_entry(nv, &rp->view_list, list) { 1084 if (nv->fn->activate(nv) == 0) { 1085 rp->view = nv; 1086 break; 1087 } 1088 } 1089 } 1090 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 1091 /* Wait for reference counter to drop to zero. */ 1092 atomic_dec(&view->ref_count); 1093 wait_event(raw3270_wait_queue, atomic_read(&view->ref_count) == 0); 1094 if (view->fn->free) 1095 view->fn->free(view); 1096 } 1097 1098 /* 1099 * Remove a 3270 device structure. 1100 */ 1101 static void 1102 raw3270_delete_device(struct raw3270 *rp) 1103 { 1104 struct ccw_device *cdev; 1105 1106 /* Remove from device chain. */ 1107 mutex_lock(&raw3270_mutex); 1108 if (rp->clttydev && !IS_ERR(rp->clttydev)) 1109 device_destroy(class3270, MKDEV(IBM_TTY3270_MAJOR, rp->minor)); 1110 if (rp->cltubdev && !IS_ERR(rp->cltubdev)) 1111 device_destroy(class3270, MKDEV(IBM_FS3270_MAJOR, rp->minor)); 1112 list_del_init(&rp->list); 1113 mutex_unlock(&raw3270_mutex); 1114 1115 /* Disconnect from ccw_device. */ 1116 cdev = rp->cdev; 1117 rp->cdev = NULL; 1118 cdev->dev.driver_data = NULL; 1119 cdev->handler = NULL; 1120 1121 /* Put ccw_device structure. */ 1122 put_device(&cdev->dev); 1123 1124 /* Now free raw3270 structure. */ 1125 kfree(rp->ascebc); 1126 kfree(rp); 1127 } 1128 1129 static int 1130 raw3270_probe (struct ccw_device *cdev) 1131 { 1132 return 0; 1133 } 1134 1135 /* 1136 * Additional attributes for a 3270 device 1137 */ 1138 static ssize_t 1139 raw3270_model_show(struct device *dev, struct device_attribute *attr, char *buf) 1140 { 1141 return snprintf(buf, PAGE_SIZE, "%i\n", 1142 ((struct raw3270 *) dev->driver_data)->model); 1143 } 1144 static DEVICE_ATTR(model, 0444, raw3270_model_show, NULL); 1145 1146 static ssize_t 1147 raw3270_rows_show(struct device *dev, struct device_attribute *attr, char *buf) 1148 { 1149 return snprintf(buf, PAGE_SIZE, "%i\n", 1150 ((struct raw3270 *) dev->driver_data)->rows); 1151 } 1152 static DEVICE_ATTR(rows, 0444, raw3270_rows_show, NULL); 1153 1154 static ssize_t 1155 raw3270_columns_show(struct device *dev, struct device_attribute *attr, char *buf) 1156 { 1157 return snprintf(buf, PAGE_SIZE, "%i\n", 1158 ((struct raw3270 *) dev->driver_data)->cols); 1159 } 1160 static DEVICE_ATTR(columns, 0444, raw3270_columns_show, NULL); 1161 1162 static struct attribute * raw3270_attrs[] = { 1163 &dev_attr_model.attr, 1164 &dev_attr_rows.attr, 1165 &dev_attr_columns.attr, 1166 NULL, 1167 }; 1168 1169 static struct attribute_group raw3270_attr_group = { 1170 .attrs = raw3270_attrs, 1171 }; 1172 1173 static int raw3270_create_attributes(struct raw3270 *rp) 1174 { 1175 int rc; 1176 1177 rc = sysfs_create_group(&rp->cdev->dev.kobj, &raw3270_attr_group); 1178 if (rc) 1179 goto out; 1180 1181 rp->clttydev = device_create(class3270, &rp->cdev->dev, 1182 MKDEV(IBM_TTY3270_MAJOR, rp->minor), 1183 "tty%s", rp->cdev->dev.bus_id); 1184 if (IS_ERR(rp->clttydev)) { 1185 rc = PTR_ERR(rp->clttydev); 1186 goto out_ttydev; 1187 } 1188 1189 rp->cltubdev = device_create(class3270, &rp->cdev->dev, 1190 MKDEV(IBM_FS3270_MAJOR, rp->minor), 1191 "tub%s", rp->cdev->dev.bus_id); 1192 if (!IS_ERR(rp->cltubdev)) 1193 goto out; 1194 1195 rc = PTR_ERR(rp->cltubdev); 1196 device_destroy(class3270, MKDEV(IBM_TTY3270_MAJOR, rp->minor)); 1197 1198 out_ttydev: 1199 sysfs_remove_group(&rp->cdev->dev.kobj, &raw3270_attr_group); 1200 out: 1201 return rc; 1202 } 1203 1204 /* 1205 * Notifier for device addition/removal 1206 */ 1207 struct raw3270_notifier { 1208 struct list_head list; 1209 void (*notifier)(int, int); 1210 }; 1211 1212 static LIST_HEAD(raw3270_notifier); 1213 1214 int raw3270_register_notifier(void (*notifier)(int, int)) 1215 { 1216 struct raw3270_notifier *np; 1217 struct raw3270 *rp; 1218 1219 np = kmalloc(sizeof(struct raw3270_notifier), GFP_KERNEL); 1220 if (!np) 1221 return -ENOMEM; 1222 np->notifier = notifier; 1223 mutex_lock(&raw3270_mutex); 1224 list_add_tail(&np->list, &raw3270_notifier); 1225 list_for_each_entry(rp, &raw3270_devices, list) { 1226 get_device(&rp->cdev->dev); 1227 notifier(rp->minor, 1); 1228 } 1229 mutex_unlock(&raw3270_mutex); 1230 return 0; 1231 } 1232 1233 void raw3270_unregister_notifier(void (*notifier)(int, int)) 1234 { 1235 struct raw3270_notifier *np; 1236 1237 mutex_lock(&raw3270_mutex); 1238 list_for_each_entry(np, &raw3270_notifier, list) 1239 if (np->notifier == notifier) { 1240 list_del(&np->list); 1241 kfree(np); 1242 break; 1243 } 1244 mutex_unlock(&raw3270_mutex); 1245 } 1246 1247 /* 1248 * Set 3270 device online. 1249 */ 1250 static int 1251 raw3270_set_online (struct ccw_device *cdev) 1252 { 1253 struct raw3270 *rp; 1254 struct raw3270_notifier *np; 1255 int rc; 1256 1257 rp = raw3270_create_device(cdev); 1258 if (IS_ERR(rp)) 1259 return PTR_ERR(rp); 1260 rc = raw3270_reset_device(rp); 1261 if (rc) 1262 goto failure; 1263 rc = raw3270_size_device(rp); 1264 if (rc) 1265 goto failure; 1266 rc = raw3270_reset_device(rp); 1267 if (rc) 1268 goto failure; 1269 rc = raw3270_create_attributes(rp); 1270 if (rc) 1271 goto failure; 1272 set_bit(RAW3270_FLAGS_READY, &rp->flags); 1273 mutex_lock(&raw3270_mutex); 1274 list_for_each_entry(np, &raw3270_notifier, list) 1275 np->notifier(rp->minor, 1); 1276 mutex_unlock(&raw3270_mutex); 1277 return 0; 1278 1279 failure: 1280 raw3270_delete_device(rp); 1281 return rc; 1282 } 1283 1284 /* 1285 * Remove 3270 device structure. 1286 */ 1287 static void 1288 raw3270_remove (struct ccw_device *cdev) 1289 { 1290 unsigned long flags; 1291 struct raw3270 *rp; 1292 struct raw3270_view *v; 1293 struct raw3270_notifier *np; 1294 1295 rp = cdev->dev.driver_data; 1296 /* 1297 * _remove is the opposite of _probe; it's probe that 1298 * should set up rp. raw3270_remove gets entered for 1299 * devices even if they haven't been varied online. 1300 * Thus, rp may validly be NULL here. 1301 */ 1302 if (rp == NULL) 1303 return; 1304 clear_bit(RAW3270_FLAGS_READY, &rp->flags); 1305 1306 sysfs_remove_group(&cdev->dev.kobj, &raw3270_attr_group); 1307 1308 /* Deactivate current view and remove all views. */ 1309 spin_lock_irqsave(get_ccwdev_lock(cdev), flags); 1310 if (rp->view) { 1311 rp->view->fn->deactivate(rp->view); 1312 rp->view = NULL; 1313 } 1314 while (!list_empty(&rp->view_list)) { 1315 v = list_entry(rp->view_list.next, struct raw3270_view, list); 1316 if (v->fn->release) 1317 v->fn->release(v); 1318 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); 1319 raw3270_del_view(v); 1320 spin_lock_irqsave(get_ccwdev_lock(cdev), flags); 1321 } 1322 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); 1323 1324 mutex_lock(&raw3270_mutex); 1325 list_for_each_entry(np, &raw3270_notifier, list) 1326 np->notifier(rp->minor, 0); 1327 mutex_unlock(&raw3270_mutex); 1328 1329 /* Reset 3270 device. */ 1330 raw3270_reset_device(rp); 1331 /* And finally remove it. */ 1332 raw3270_delete_device(rp); 1333 } 1334 1335 /* 1336 * Set 3270 device offline. 1337 */ 1338 static int 1339 raw3270_set_offline (struct ccw_device *cdev) 1340 { 1341 struct raw3270 *rp; 1342 1343 rp = cdev->dev.driver_data; 1344 if (test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) 1345 return -EBUSY; 1346 raw3270_remove(cdev); 1347 return 0; 1348 } 1349 1350 static struct ccw_device_id raw3270_id[] = { 1351 { CCW_DEVICE(0x3270, 0) }, 1352 { CCW_DEVICE(0x3271, 0) }, 1353 { CCW_DEVICE(0x3272, 0) }, 1354 { CCW_DEVICE(0x3273, 0) }, 1355 { CCW_DEVICE(0x3274, 0) }, 1356 { CCW_DEVICE(0x3275, 0) }, 1357 { CCW_DEVICE(0x3276, 0) }, 1358 { CCW_DEVICE(0x3277, 0) }, 1359 { CCW_DEVICE(0x3278, 0) }, 1360 { CCW_DEVICE(0x3279, 0) }, 1361 { CCW_DEVICE(0x3174, 0) }, 1362 { /* end of list */ }, 1363 }; 1364 1365 static struct ccw_driver raw3270_ccw_driver = { 1366 .name = "3270", 1367 .owner = THIS_MODULE, 1368 .ids = raw3270_id, 1369 .probe = &raw3270_probe, 1370 .remove = &raw3270_remove, 1371 .set_online = &raw3270_set_online, 1372 .set_offline = &raw3270_set_offline, 1373 }; 1374 1375 static int 1376 raw3270_init(void) 1377 { 1378 struct raw3270 *rp; 1379 int rc; 1380 1381 if (raw3270_registered) 1382 return 0; 1383 raw3270_registered = 1; 1384 rc = ccw_driver_register(&raw3270_ccw_driver); 1385 if (rc == 0) { 1386 /* Create attributes for early (= console) device. */ 1387 mutex_lock(&raw3270_mutex); 1388 class3270 = class_create(THIS_MODULE, "3270"); 1389 list_for_each_entry(rp, &raw3270_devices, list) { 1390 get_device(&rp->cdev->dev); 1391 raw3270_create_attributes(rp); 1392 } 1393 mutex_unlock(&raw3270_mutex); 1394 } 1395 return rc; 1396 } 1397 1398 static void 1399 raw3270_exit(void) 1400 { 1401 ccw_driver_unregister(&raw3270_ccw_driver); 1402 class_destroy(class3270); 1403 } 1404 1405 MODULE_LICENSE("GPL"); 1406 1407 module_init(raw3270_init); 1408 module_exit(raw3270_exit); 1409 1410 EXPORT_SYMBOL(raw3270_request_alloc); 1411 EXPORT_SYMBOL(raw3270_request_free); 1412 EXPORT_SYMBOL(raw3270_request_reset); 1413 EXPORT_SYMBOL(raw3270_request_set_cmd); 1414 EXPORT_SYMBOL(raw3270_request_add_data); 1415 EXPORT_SYMBOL(raw3270_request_set_data); 1416 EXPORT_SYMBOL(raw3270_request_set_idal); 1417 EXPORT_SYMBOL(raw3270_buffer_address); 1418 EXPORT_SYMBOL(raw3270_add_view); 1419 EXPORT_SYMBOL(raw3270_del_view); 1420 EXPORT_SYMBOL(raw3270_find_view); 1421 EXPORT_SYMBOL(raw3270_activate_view); 1422 EXPORT_SYMBOL(raw3270_deactivate_view); 1423 EXPORT_SYMBOL(raw3270_start); 1424 EXPORT_SYMBOL(raw3270_start_locked); 1425 EXPORT_SYMBOL(raw3270_start_irq); 1426 EXPORT_SYMBOL(raw3270_reset); 1427 EXPORT_SYMBOL(raw3270_register_notifier); 1428 EXPORT_SYMBOL(raw3270_unregister_notifier); 1429 EXPORT_SYMBOL(raw3270_wait_queue); 1430