2 * IBM/3270 Driver - core functions.
5 * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
6 * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com>
7 * Copyright IBM Corp. 2003, 2009
10 #include <linux/module.h>
11 #include <linux/err.h>
12 #include <linux/init.h>
13 #include <linux/interrupt.h>
14 #include <linux/list.h>
15 #include <linux/slab.h>
16 #include <linux/types.h>
17 #include <linux/wait.h>
19 #include <asm/ccwdev.h>
21 #include <asm/ebcdic.h>
26 #include <linux/major.h>
27 #include <linux/kdev_t.h>
28 #include <linux/device.h>
29 #include <linux/mutex.h>
31 struct class *class3270;
33 /* The main 3270 data structure. */
35 struct list_head list;
36 struct ccw_device *cdev;
39 short model, rows, cols;
43 struct list_head req_queue; /* Request queue. */
44 struct list_head view_list; /* List of available views. */
45 struct raw3270_view *view; /* Active view. */
47 struct timer_list timer; /* Device timer. */
49 unsigned char *ascebc; /* ascii -> ebcdic table */
51 struct raw3270_view init_view;
52 struct raw3270_request init_reset;
53 struct raw3270_request init_readpart;
54 struct raw3270_request init_readmod;
55 unsigned char init_data[256];
59 #define RAW3270_STATE_INIT 0 /* Initial state */
60 #define RAW3270_STATE_RESET 1 /* Reset command is pending */
61 #define RAW3270_STATE_W4ATTN 2 /* Wait for attention interrupt */
62 #define RAW3270_STATE_READMOD 3 /* Read partition is pending */
63 #define RAW3270_STATE_READY 4 /* Device is usable by views */
66 #define RAW3270_FLAGS_14BITADDR 0 /* 14-bit buffer addresses */
67 #define RAW3270_FLAGS_BUSY 1 /* Device busy, leave it alone */
68 #define RAW3270_FLAGS_CONSOLE 2 /* Device is the console. */
69 #define RAW3270_FLAGS_FROZEN 3 /* set if 3270 is frozen for suspend */
71 /* Semaphore to protect global data of raw3270 (devices, views, etc). */
72 static DEFINE_MUTEX(raw3270_mutex);
74 /* List of 3270 devices. */
75 static LIST_HEAD(raw3270_devices);
78 * Flag to indicate if the driver has been registered. Some operations
79 * like waiting for the end of i/o need to be done differently as long
80 * as the kernel is still starting up (console support).
82 static int raw3270_registered;
84 /* Module parameters */
85 static bool tubxcorrect = 0;
86 module_param(tubxcorrect, bool, 0);
89 * Wait queue for device init/delete, view delete.
91 DECLARE_WAIT_QUEUE_HEAD(raw3270_wait_queue);
94 * Encode array for 12 bit 3270 addresses.
96 static unsigned char raw3270_ebcgraf[64] = {
97 0x40, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
98 0xc8, 0xc9, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
99 0x50, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
100 0xd8, 0xd9, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
101 0x60, 0x61, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
102 0xe8, 0xe9, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
103 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
104 0xf8, 0xf9, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f
107 static inline int raw3270_state_ready(struct raw3270 *rp)
109 return rp->state == RAW3270_STATE_READY;
112 static inline int raw3270_state_final(struct raw3270 *rp)
114 return rp->state == RAW3270_STATE_INIT ||
115 rp->state == RAW3270_STATE_READY;
119 raw3270_buffer_address(struct raw3270 *rp, char *cp, unsigned short addr)
121 if (test_bit(RAW3270_FLAGS_14BITADDR, &rp->flags)) {
122 cp[0] = (addr >> 8) & 0x3f;
125 cp[0] = raw3270_ebcgraf[(addr >> 6) & 0x3f];
126 cp[1] = raw3270_ebcgraf[addr & 0x3f];
131 * Allocate a new 3270 ccw request
133 struct raw3270_request *
134 raw3270_request_alloc(size_t size)
136 struct raw3270_request *rq;
138 /* Allocate request structure */
139 rq = kzalloc(sizeof(struct raw3270_request), GFP_KERNEL | GFP_DMA);
141 return ERR_PTR(-ENOMEM);
143 /* alloc output buffer. */
145 rq->buffer = kmalloc(size, GFP_KERNEL | GFP_DMA);
148 return ERR_PTR(-ENOMEM);
152 INIT_LIST_HEAD(&rq->list);
157 rq->ccw.cda = __pa(rq->buffer);
158 rq->ccw.flags = CCW_FLAG_SLI;
164 * Free 3270 ccw request
167 raw3270_request_free (struct raw3270_request *rq)
174 * Reset request to initial state.
177 raw3270_request_reset(struct raw3270_request *rq)
179 BUG_ON(!list_empty(&rq->list));
180 rq->ccw.cmd_code = 0;
182 rq->ccw.cda = __pa(rq->buffer);
183 rq->ccw.flags = CCW_FLAG_SLI;
189 * Set command code to ccw of a request.
192 raw3270_request_set_cmd(struct raw3270_request *rq, u8 cmd)
194 rq->ccw.cmd_code = cmd;
198 * Add data fragment to output buffer.
201 raw3270_request_add_data(struct raw3270_request *rq, void *data, size_t size)
203 if (size + rq->ccw.count > rq->size)
205 memcpy(rq->buffer + rq->ccw.count, data, size);
206 rq->ccw.count += size;
211 * Set address/length pair to ccw of a request.
214 raw3270_request_set_data(struct raw3270_request *rq, void *data, size_t size)
216 rq->ccw.cda = __pa(data);
217 rq->ccw.count = size;
221 * Set idal buffer to ccw of a request.
224 raw3270_request_set_idal(struct raw3270_request *rq, struct idal_buffer *ib)
226 rq->ccw.cda = __pa(ib->data);
227 rq->ccw.count = ib->size;
228 rq->ccw.flags |= CCW_FLAG_IDA;
235 __raw3270_halt_io(struct raw3270 *rp, struct raw3270_request *rq)
240 if (raw3270_request_final(rq))
242 /* Check if interrupt has already been processed */
243 for (retries = 0; retries < 5; retries++) {
245 rc = ccw_device_halt(rp->cdev, (long) rq);
247 rc = ccw_device_clear(rp->cdev, (long) rq);
249 break; /* termination successful */
255 * Add the request to the request queue, try to start it if the
256 * 3270 device is idle. Return without waiting for end of i/o.
259 __raw3270_start(struct raw3270 *rp, struct raw3270_view *view,
260 struct raw3270_request *rq)
263 raw3270_get_view(view);
264 if (list_empty(&rp->req_queue) &&
265 !test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) {
266 /* No other requests are on the queue. Start this one. */
267 rq->rc = ccw_device_start(rp->cdev, &rq->ccw,
268 (unsigned long) rq, 0, 0);
270 raw3270_put_view(view);
274 list_add_tail(&rq->list, &rp->req_queue);
279 raw3270_start(struct raw3270_view *view, struct raw3270_request *rq)
285 spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags);
287 if (!rp || rp->view != view ||
288 test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
290 else if (!raw3270_state_ready(rp))
293 rc = __raw3270_start(rp, view, rq);
294 spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags);
299 raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq)
305 if (!rp || rp->view != view ||
306 test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
308 else if (!raw3270_state_ready(rp))
311 rc = __raw3270_start(rp, view, rq);
316 raw3270_start_irq(struct raw3270_view *view, struct raw3270_request *rq)
322 raw3270_get_view(view);
323 list_add_tail(&rq->list, &rp->req_queue);
328 * 3270 interrupt routine, called from the ccw_device layer
331 raw3270_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
334 struct raw3270_view *view;
335 struct raw3270_request *rq;
338 rp = dev_get_drvdata(&cdev->dev);
341 rq = (struct raw3270_request *) intparm;
342 view = rq ? rq->view : rp->view;
345 rc = RAW3270_IO_RETRY;
346 else if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
348 rc = RAW3270_IO_DONE;
349 } else if (irb->scsw.cmd.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END |
350 DEV_STAT_UNIT_EXCEP)) {
351 /* Handle CE-DE-UE and subsequent UDE */
352 set_bit(RAW3270_FLAGS_BUSY, &rp->flags);
353 rc = RAW3270_IO_BUSY;
354 } else if (test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) {
355 /* Wait for UDE if busy flag is set. */
356 if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) {
357 clear_bit(RAW3270_FLAGS_BUSY, &rp->flags);
358 /* Got it, now retry. */
359 rc = RAW3270_IO_RETRY;
361 rc = RAW3270_IO_BUSY;
363 rc = view->fn->intv(view, rq, irb);
365 rc = RAW3270_IO_DONE;
368 case RAW3270_IO_DONE:
370 case RAW3270_IO_BUSY:
372 * Intervention required by the operator. We have to wait
373 * for unsolicited device end.
376 case RAW3270_IO_RETRY:
379 rq->rc = ccw_device_start(rp->cdev, &rq->ccw,
380 (unsigned long) rq, 0, 0);
382 return; /* Successfully restarted. */
384 case RAW3270_IO_STOP:
387 __raw3270_halt_io(rp, rq);
394 BUG_ON(list_empty(&rq->list));
395 /* The request completed, remove from queue and do callback. */
396 list_del_init(&rq->list);
398 rq->callback(rq, rq->callback_data);
399 /* Do put_device for get_device in raw3270_start. */
400 raw3270_put_view(view);
403 * Try to start each request on request queue until one is
404 * started successful.
406 while (!list_empty(&rp->req_queue)) {
407 rq = list_entry(rp->req_queue.next,struct raw3270_request,list);
408 rq->rc = ccw_device_start(rp->cdev, &rq->ccw,
409 (unsigned long) rq, 0, 0);
412 /* Start failed. Remove request and do callback. */
413 list_del_init(&rq->list);
415 rq->callback(rq, rq->callback_data);
416 /* Do put_device for get_device in raw3270_start. */
417 raw3270_put_view(view);
422 * To determine the size of the 3270 device we need to do:
423 * 1) send a 'read partition' data stream to the device
424 * 2) wait for the attn interrupt that precedes the query reply
425 * 3) do a read modified to get the query reply
426 * To make things worse we have to cope with intervention
427 * required (3270 device switched to 'stand-by') and command
428 * rejects (old devices that can't do 'read partition').
430 struct raw3270_ua { /* Query Reply structure for Usable Area */
431 struct { /* Usable Area Query Reply Base */
432 short l; /* Length of this structured field */
433 char sfid; /* 0x81 if Query Reply */
434 char qcode; /* 0x81 if Usable Area */
437 short w; /* Width of usable area */
438 short h; /* Heigth of usavle area */
439 char units; /* 0x00:in; 0x01:mm */
444 short buffsz; /* Character buffer size, bytes */
449 } __attribute__ ((packed)) uab;
450 struct { /* Alternate Usable Area Self-Defining Parameter */
451 char l; /* Length of this Self-Defining Parm */
452 char sdpid; /* 0x02 if Alternate Usable Area */
454 char auaid; /* 0x01 is Id for the A U A */
455 short wauai; /* Width of AUAi */
456 short hauai; /* Height of AUAi */
457 char auaunits; /* 0x00:in, 0x01:mm */
462 } __attribute__ ((packed)) aua;
463 } __attribute__ ((packed));
466 raw3270_size_device_vm(struct raw3270 *rp)
469 struct ccw_dev_id dev_id;
470 struct diag210 diag_data;
472 ccw_device_get_id(rp->cdev, &dev_id);
473 diag_data.vrdcdvno = dev_id.devno;
474 diag_data.vrdclen = sizeof(struct diag210);
475 rc = diag210(&diag_data);
476 model = diag_data.vrdccrmd;
477 /* Use default model 2 if the size could not be detected */
478 if (rc || model < 2 || model > 5)
505 raw3270_size_device(struct raw3270 *rp)
507 struct raw3270_ua *uap;
509 /* Got a Query Reply */
510 uap = (struct raw3270_ua *) (rp->init_data + 1);
511 /* Paranoia check. */
512 if (rp->init_readmod.rc || rp->init_data[0] != 0x88 ||
513 uap->uab.qcode != 0x81) {
514 /* Couldn't detect size. Use default model 2. */
520 /* Copy rows/columns of default Usable Area */
521 rp->rows = uap->uab.h;
522 rp->cols = uap->uab.w;
523 /* Check for 14 bit addressing */
524 if ((uap->uab.flags0 & 0x0d) == 0x01)
525 set_bit(RAW3270_FLAGS_14BITADDR, &rp->flags);
526 /* Check for Alternate Usable Area */
527 if (uap->uab.l == sizeof(struct raw3270_ua) &&
528 uap->aua.sdpid == 0x02) {
529 rp->rows = uap->aua.hauai;
530 rp->cols = uap->aua.wauai;
532 /* Try to find a model. */
534 if (rp->rows == 24 && rp->cols == 80)
536 if (rp->rows == 32 && rp->cols == 80)
538 if (rp->rows == 43 && rp->cols == 80)
540 if (rp->rows == 27 && rp->cols == 132)
545 raw3270_size_device_done(struct raw3270 *rp)
547 struct raw3270_view *view;
550 rp->state = RAW3270_STATE_READY;
551 /* Notify views about new size */
552 list_for_each_entry(view, &rp->view_list, list)
553 if (view->fn->resize)
554 view->fn->resize(view, rp->model, rp->rows, rp->cols);
555 /* Setup processing done, now activate a view */
556 list_for_each_entry(view, &rp->view_list, list) {
558 if (view->fn->activate(view) == 0)
565 raw3270_read_modified_cb(struct raw3270_request *rq, void *data)
567 struct raw3270 *rp = rq->view->dev;
569 raw3270_size_device(rp);
570 raw3270_size_device_done(rp);
574 raw3270_read_modified(struct raw3270 *rp)
576 if (rp->state != RAW3270_STATE_W4ATTN)
578 /* Use 'read modified' to get the result of a read partition. */
579 memset(&rp->init_readmod, 0, sizeof(rp->init_readmod));
580 memset(&rp->init_data, 0, sizeof(rp->init_data));
581 rp->init_readmod.ccw.cmd_code = TC_READMOD;
582 rp->init_readmod.ccw.flags = CCW_FLAG_SLI;
583 rp->init_readmod.ccw.count = sizeof(rp->init_data);
584 rp->init_readmod.ccw.cda = (__u32) __pa(rp->init_data);
585 rp->init_readmod.callback = raw3270_read_modified_cb;
586 rp->state = RAW3270_STATE_READMOD;
587 raw3270_start_irq(&rp->init_view, &rp->init_readmod);
591 raw3270_writesf_readpart(struct raw3270 *rp)
593 static const unsigned char wbuf[] =
594 { 0x00, 0x07, 0x01, 0xff, 0x03, 0x00, 0x81 };
596 /* Store 'read partition' data stream to init_data */
597 memset(&rp->init_readpart, 0, sizeof(rp->init_readpart));
598 memset(&rp->init_data, 0, sizeof(rp->init_data));
599 memcpy(&rp->init_data, wbuf, sizeof(wbuf));
600 rp->init_readpart.ccw.cmd_code = TC_WRITESF;
601 rp->init_readpart.ccw.flags = CCW_FLAG_SLI;
602 rp->init_readpart.ccw.count = sizeof(wbuf);
603 rp->init_readpart.ccw.cda = (__u32) __pa(&rp->init_data);
604 rp->state = RAW3270_STATE_W4ATTN;
605 raw3270_start_irq(&rp->init_view, &rp->init_readpart);
612 raw3270_reset_device_cb(struct raw3270_request *rq, void *data)
614 struct raw3270 *rp = rq->view->dev;
616 if (rp->state != RAW3270_STATE_RESET)
619 /* Reset command failed. */
620 rp->state = RAW3270_STATE_INIT;
621 } else if (MACHINE_IS_VM) {
622 raw3270_size_device_vm(rp);
623 raw3270_size_device_done(rp);
625 raw3270_writesf_readpart(rp);
629 __raw3270_reset_device(struct raw3270 *rp)
633 /* Store reset data stream to init_data/init_reset */
634 memset(&rp->init_reset, 0, sizeof(rp->init_reset));
635 memset(&rp->init_data, 0, sizeof(rp->init_data));
636 rp->init_data[0] = TW_KR;
637 rp->init_reset.ccw.cmd_code = TC_EWRITEA;
638 rp->init_reset.ccw.flags = CCW_FLAG_SLI;
639 rp->init_reset.ccw.count = 1;
640 rp->init_reset.ccw.cda = (__u32) __pa(rp->init_data);
641 rp->init_reset.callback = raw3270_reset_device_cb;
642 rc = __raw3270_start(rp, &rp->init_view, &rp->init_reset);
643 if (rc == 0 && rp->state == RAW3270_STATE_INIT)
644 rp->state = RAW3270_STATE_RESET;
649 raw3270_reset_device(struct raw3270 *rp)
654 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
655 rc = __raw3270_reset_device(rp);
656 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
661 raw3270_reset(struct raw3270_view *view)
667 if (!rp || rp->view != view ||
668 test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
670 else if (!raw3270_state_ready(rp))
673 rc = raw3270_reset_device(view->dev);
678 raw3270_init_irq(struct raw3270_view *view, struct raw3270_request *rq,
684 * Unit-Check Processing:
685 * Expect Command Reject or Intervention Required.
687 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
688 /* Request finished abnormally. */
689 if (irb->ecw[0] & SNS0_INTERVENTION_REQ) {
690 set_bit(RAW3270_FLAGS_BUSY, &view->dev->flags);
691 return RAW3270_IO_BUSY;
695 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
696 if (irb->ecw[0] & SNS0_CMD_REJECT)
697 rq->rc = -EOPNOTSUPP;
702 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) {
703 /* Queue read modified after attention interrupt */
705 raw3270_read_modified(rp);
707 return RAW3270_IO_DONE;
710 static struct raw3270_fn raw3270_init_fn = {
711 .intv = raw3270_init_irq
715 * Setup new 3270 device.
718 raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc)
724 memset(rp, 0, sizeof(struct raw3270));
725 /* Copy ebcdic -> ascii translation table. */
726 memcpy(ascebc, _ascebc, 256);
728 /* correct brackets and circumflex */
739 INIT_LIST_HEAD(&rp->req_queue);
740 INIT_LIST_HEAD(&rp->view_list);
742 rp->init_view.dev = rp;
743 rp->init_view.fn = &raw3270_init_fn;
744 rp->view = &rp->init_view;
747 * Add device to list and find the smallest unused minor
748 * number for it. Note: there is no device with minor 0,
749 * see special case for fs3270.c:fs3270_open().
751 mutex_lock(&raw3270_mutex);
752 /* Keep the list sorted. */
753 minor = RAW3270_FIRSTMINOR;
755 list_for_each(l, &raw3270_devices) {
756 tmp = list_entry(l, struct raw3270, list);
757 if (tmp->minor > minor) {
759 __list_add(&rp->list, l->prev, l);
764 if (rp->minor == -1 && minor < RAW3270_MAXDEVS + RAW3270_FIRSTMINOR) {
766 list_add_tail(&rp->list, &raw3270_devices);
768 mutex_unlock(&raw3270_mutex);
769 /* No free minor number? Then give up. */
773 dev_set_drvdata(&cdev->dev, rp);
774 cdev->handler = raw3270_irq;
778 #ifdef CONFIG_TN3270_CONSOLE
779 /* Tentative definition - see below for actual definition. */
780 static struct ccw_driver raw3270_ccw_driver;
783 * Setup 3270 device configured as console.
785 struct raw3270 __init *raw3270_setup_console(void)
787 struct ccw_device *cdev;
793 cdev = ccw_device_create_console(&raw3270_ccw_driver);
795 return ERR_CAST(cdev);
797 rp = kzalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA);
798 ascebc = kzalloc(256, GFP_KERNEL);
799 rc = raw3270_setup_device(cdev, rp, ascebc);
802 set_bit(RAW3270_FLAGS_CONSOLE, &rp->flags);
804 rc = ccw_device_enable_console(cdev);
806 ccw_device_destroy_console(cdev);
810 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
812 __raw3270_reset_device(rp);
813 while (!raw3270_state_final(rp)) {
814 ccw_device_wait_idle(rp->cdev);
817 } while (rp->state != RAW3270_STATE_READY);
818 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
823 raw3270_wait_cons_dev(struct raw3270 *rp)
827 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
828 ccw_device_wait_idle(rp->cdev);
829 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
835 * Create a 3270 device structure.
837 static struct raw3270 *
838 raw3270_create_device(struct ccw_device *cdev)
844 rp = kmalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA);
846 return ERR_PTR(-ENOMEM);
847 ascebc = kmalloc(256, GFP_KERNEL);
850 return ERR_PTR(-ENOMEM);
852 rc = raw3270_setup_device(cdev, rp, ascebc);
858 /* Get reference to ccw_device structure. */
859 get_device(&cdev->dev);
867 raw3270_activate_view(struct raw3270_view *view)
870 struct raw3270_view *oldview, *nv;
877 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
878 if (rp->view == view)
880 else if (!raw3270_state_ready(rp))
882 else if (test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
886 if (rp->view && rp->view->fn->deactivate) {
888 oldview->fn->deactivate(oldview);
891 rc = view->fn->activate(view);
893 /* Didn't work. Try to reactivate the old view. */
895 if (!oldview || oldview->fn->activate(oldview) != 0) {
896 /* Didn't work as well. Try any other view. */
897 list_for_each_entry(nv, &rp->view_list, list)
898 if (nv != view && nv != oldview) {
900 if (nv->fn->activate(nv) == 0)
907 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
912 * Deactivate current view.
915 raw3270_deactivate_view(struct raw3270_view *view)
923 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
924 if (rp->view == view) {
925 view->fn->deactivate(view);
927 /* Move deactivated view to end of list. */
928 list_del_init(&view->list);
929 list_add_tail(&view->list, &rp->view_list);
930 /* Try to activate another view. */
931 if (raw3270_state_ready(rp) &&
932 !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) {
933 list_for_each_entry(view, &rp->view_list, list) {
935 if (view->fn->activate(view) == 0)
941 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
945 * Add view to device with minor "minor".
948 raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn, int minor)
956 mutex_lock(&raw3270_mutex);
958 list_for_each_entry(rp, &raw3270_devices, list) {
959 if (rp->minor != minor)
961 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
962 atomic_set(&view->ref_count, 2);
965 view->model = rp->model;
966 view->rows = rp->rows;
967 view->cols = rp->cols;
968 view->ascebc = rp->ascebc;
969 spin_lock_init(&view->lock);
970 list_add(&view->list, &rp->view_list);
972 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
975 mutex_unlock(&raw3270_mutex);
980 * Find specific view of device with minor "minor".
982 struct raw3270_view *
983 raw3270_find_view(struct raw3270_fn *fn, int minor)
986 struct raw3270_view *view, *tmp;
989 mutex_lock(&raw3270_mutex);
990 view = ERR_PTR(-ENODEV);
991 list_for_each_entry(rp, &raw3270_devices, list) {
992 if (rp->minor != minor)
994 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
995 list_for_each_entry(tmp, &rp->view_list, list) {
997 raw3270_get_view(tmp);
1002 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
1005 mutex_unlock(&raw3270_mutex);
1010 * Remove view from device and free view structure via call to view->fn->free.
1013 raw3270_del_view(struct raw3270_view *view)
1015 unsigned long flags;
1017 struct raw3270_view *nv;
1020 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
1021 if (rp->view == view) {
1022 view->fn->deactivate(view);
1025 list_del_init(&view->list);
1026 if (!rp->view && raw3270_state_ready(rp) &&
1027 !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) {
1028 /* Try to activate another view. */
1029 list_for_each_entry(nv, &rp->view_list, list) {
1030 if (nv->fn->activate(nv) == 0) {
1036 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
1037 /* Wait for reference counter to drop to zero. */
1038 atomic_dec(&view->ref_count);
1039 wait_event(raw3270_wait_queue, atomic_read(&view->ref_count) == 0);
1041 view->fn->free(view);
1045 * Remove a 3270 device structure.
1048 raw3270_delete_device(struct raw3270 *rp)
1050 struct ccw_device *cdev;
1052 /* Remove from device chain. */
1053 mutex_lock(&raw3270_mutex);
1054 list_del_init(&rp->list);
1055 mutex_unlock(&raw3270_mutex);
1057 /* Disconnect from ccw_device. */
1060 dev_set_drvdata(&cdev->dev, NULL);
1061 cdev->handler = NULL;
1063 /* Put ccw_device structure. */
1064 put_device(&cdev->dev);
1066 /* Now free raw3270 structure. */
1072 raw3270_probe (struct ccw_device *cdev)
1078 * Additional attributes for a 3270 device
1081 raw3270_model_show(struct device *dev, struct device_attribute *attr, char *buf)
1083 return snprintf(buf, PAGE_SIZE, "%i\n",
1084 ((struct raw3270 *) dev_get_drvdata(dev))->model);
1086 static DEVICE_ATTR(model, 0444, raw3270_model_show, NULL);
1089 raw3270_rows_show(struct device *dev, struct device_attribute *attr, char *buf)
1091 return snprintf(buf, PAGE_SIZE, "%i\n",
1092 ((struct raw3270 *) dev_get_drvdata(dev))->rows);
1094 static DEVICE_ATTR(rows, 0444, raw3270_rows_show, NULL);
1097 raw3270_columns_show(struct device *dev, struct device_attribute *attr, char *buf)
1099 return snprintf(buf, PAGE_SIZE, "%i\n",
1100 ((struct raw3270 *) dev_get_drvdata(dev))->cols);
1102 static DEVICE_ATTR(columns, 0444, raw3270_columns_show, NULL);
1104 static struct attribute * raw3270_attrs[] = {
1105 &dev_attr_model.attr,
1106 &dev_attr_rows.attr,
1107 &dev_attr_columns.attr,
1111 static struct attribute_group raw3270_attr_group = {
1112 .attrs = raw3270_attrs,
1115 static int raw3270_create_attributes(struct raw3270 *rp)
1117 return sysfs_create_group(&rp->cdev->dev.kobj, &raw3270_attr_group);
1121 * Notifier for device addition/removal
1123 static LIST_HEAD(raw3270_notifier);
1125 int raw3270_register_notifier(struct raw3270_notifier *notifier)
1129 mutex_lock(&raw3270_mutex);
1130 list_add_tail(¬ifier->list, &raw3270_notifier);
1131 list_for_each_entry(rp, &raw3270_devices, list)
1132 notifier->create(rp->minor);
1133 mutex_unlock(&raw3270_mutex);
1137 void raw3270_unregister_notifier(struct raw3270_notifier *notifier)
1141 mutex_lock(&raw3270_mutex);
1142 list_for_each_entry(rp, &raw3270_devices, list)
1143 notifier->destroy(rp->minor);
1144 list_del(¬ifier->list);
1145 mutex_unlock(&raw3270_mutex);
1149 * Set 3270 device online.
1152 raw3270_set_online (struct ccw_device *cdev)
1154 struct raw3270_notifier *np;
1158 rp = raw3270_create_device(cdev);
1161 rc = raw3270_create_attributes(rp);
1164 raw3270_reset_device(rp);
1165 mutex_lock(&raw3270_mutex);
1166 list_for_each_entry(np, &raw3270_notifier, list)
1167 np->create(rp->minor);
1168 mutex_unlock(&raw3270_mutex);
1172 raw3270_delete_device(rp);
1177 * Remove 3270 device structure.
1180 raw3270_remove (struct ccw_device *cdev)
1182 unsigned long flags;
1184 struct raw3270_view *v;
1185 struct raw3270_notifier *np;
1187 rp = dev_get_drvdata(&cdev->dev);
1189 * _remove is the opposite of _probe; it's probe that
1190 * should set up rp. raw3270_remove gets entered for
1191 * devices even if they haven't been varied online.
1192 * Thus, rp may validly be NULL here.
1197 sysfs_remove_group(&cdev->dev.kobj, &raw3270_attr_group);
1199 /* Deactivate current view and remove all views. */
1200 spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
1202 if (rp->view->fn->deactivate)
1203 rp->view->fn->deactivate(rp->view);
1206 while (!list_empty(&rp->view_list)) {
1207 v = list_entry(rp->view_list.next, struct raw3270_view, list);
1210 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
1211 raw3270_del_view(v);
1212 spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
1214 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
1216 mutex_lock(&raw3270_mutex);
1217 list_for_each_entry(np, &raw3270_notifier, list)
1218 np->destroy(rp->minor);
1219 mutex_unlock(&raw3270_mutex);
1221 /* Reset 3270 device. */
1222 raw3270_reset_device(rp);
1223 /* And finally remove it. */
1224 raw3270_delete_device(rp);
1228 * Set 3270 device offline.
1231 raw3270_set_offline (struct ccw_device *cdev)
1235 rp = dev_get_drvdata(&cdev->dev);
1236 if (test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags))
1238 raw3270_remove(cdev);
1242 static int raw3270_pm_stop(struct ccw_device *cdev)
1245 struct raw3270_view *view;
1246 unsigned long flags;
1248 rp = dev_get_drvdata(&cdev->dev);
1251 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
1252 if (rp->view && rp->view->fn->deactivate)
1253 rp->view->fn->deactivate(rp->view);
1254 if (!test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) {
1256 * Release tty and fullscreen for all non-console
1259 list_for_each_entry(view, &rp->view_list, list) {
1260 if (view->fn->release)
1261 view->fn->release(view);
1264 set_bit(RAW3270_FLAGS_FROZEN, &rp->flags);
1265 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
1269 static int raw3270_pm_start(struct ccw_device *cdev)
1272 unsigned long flags;
1274 rp = dev_get_drvdata(&cdev->dev);
1277 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
1278 clear_bit(RAW3270_FLAGS_FROZEN, &rp->flags);
1279 if (rp->view && rp->view->fn->activate)
1280 rp->view->fn->activate(rp->view);
1281 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
1285 void raw3270_pm_unfreeze(struct raw3270_view *view)
1287 #ifdef CONFIG_TN3270_CONSOLE
1291 if (rp && test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
1292 ccw_device_force_console(rp->cdev);
1296 static struct ccw_device_id raw3270_id[] = {
1297 { CCW_DEVICE(0x3270, 0) },
1298 { CCW_DEVICE(0x3271, 0) },
1299 { CCW_DEVICE(0x3272, 0) },
1300 { CCW_DEVICE(0x3273, 0) },
1301 { CCW_DEVICE(0x3274, 0) },
1302 { CCW_DEVICE(0x3275, 0) },
1303 { CCW_DEVICE(0x3276, 0) },
1304 { CCW_DEVICE(0x3277, 0) },
1305 { CCW_DEVICE(0x3278, 0) },
1306 { CCW_DEVICE(0x3279, 0) },
1307 { CCW_DEVICE(0x3174, 0) },
1308 { /* end of list */ },
1311 static struct ccw_driver raw3270_ccw_driver = {
1314 .owner = THIS_MODULE,
1317 .probe = &raw3270_probe,
1318 .remove = &raw3270_remove,
1319 .set_online = &raw3270_set_online,
1320 .set_offline = &raw3270_set_offline,
1321 .freeze = &raw3270_pm_stop,
1322 .thaw = &raw3270_pm_start,
1323 .restore = &raw3270_pm_start,
1324 .int_class = IRQIO_C70,
1333 if (raw3270_registered)
1335 raw3270_registered = 1;
1336 rc = ccw_driver_register(&raw3270_ccw_driver);
1338 /* Create attributes for early (= console) device. */
1339 mutex_lock(&raw3270_mutex);
1340 class3270 = class_create(THIS_MODULE, "3270");
1341 list_for_each_entry(rp, &raw3270_devices, list) {
1342 get_device(&rp->cdev->dev);
1343 raw3270_create_attributes(rp);
1345 mutex_unlock(&raw3270_mutex);
1353 ccw_driver_unregister(&raw3270_ccw_driver);
1354 class_destroy(class3270);
1357 MODULE_LICENSE("GPL");
1359 module_init(raw3270_init);
1360 module_exit(raw3270_exit);
1362 EXPORT_SYMBOL(class3270);
1363 EXPORT_SYMBOL(raw3270_request_alloc);
1364 EXPORT_SYMBOL(raw3270_request_free);
1365 EXPORT_SYMBOL(raw3270_request_reset);
1366 EXPORT_SYMBOL(raw3270_request_set_cmd);
1367 EXPORT_SYMBOL(raw3270_request_add_data);
1368 EXPORT_SYMBOL(raw3270_request_set_data);
1369 EXPORT_SYMBOL(raw3270_request_set_idal);
1370 EXPORT_SYMBOL(raw3270_buffer_address);
1371 EXPORT_SYMBOL(raw3270_add_view);
1372 EXPORT_SYMBOL(raw3270_del_view);
1373 EXPORT_SYMBOL(raw3270_find_view);
1374 EXPORT_SYMBOL(raw3270_activate_view);
1375 EXPORT_SYMBOL(raw3270_deactivate_view);
1376 EXPORT_SYMBOL(raw3270_start);
1377 EXPORT_SYMBOL(raw3270_start_locked);
1378 EXPORT_SYMBOL(raw3270_start_irq);
1379 EXPORT_SYMBOL(raw3270_reset);
1380 EXPORT_SYMBOL(raw3270_register_notifier);
1381 EXPORT_SYMBOL(raw3270_unregister_notifier);
1382 EXPORT_SYMBOL(raw3270_wait_queue);