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1da177e4 LT |
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 | ||
1da177e4 LT |
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 | ||
25 | #include "raw3270.h" | |
26 | ||
ed3cb6f0 RH |
27 | #include <linux/major.h> |
28 | #include <linux/kdev_t.h> | |
29 | #include <linux/device.h> | |
14cc3e2b | 30 | #include <linux/mutex.h> |
ed3cb6f0 RH |
31 | |
32 | struct class *class3270; | |
33 | ||
1da177e4 LT |
34 | /* The main 3270 data structure. */ |
35 | struct raw3270 { | |
36 | struct list_head list; | |
37 | struct ccw_device *cdev; | |
38 | int minor; | |
39 | ||
40 | short model, rows, cols; | |
41 | unsigned long flags; | |
42 | ||
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. */ | |
46 | ||
47 | struct timer_list timer; /* Device timer. */ | |
48 | ||
49 | unsigned char *ascebc; /* ascii -> ebcdic table */ | |
ed3cb6f0 RH |
50 | struct class_device *clttydev; /* 3270-class tty device ptr */ |
51 | struct class_device *cltubdev; /* 3270-class tub device ptr */ | |
132fab13 MS |
52 | |
53 | struct raw3270_request init_request; | |
54 | unsigned char init_data[256]; | |
1da177e4 LT |
55 | }; |
56 | ||
57 | /* raw3270->flags */ | |
58 | #define RAW3270_FLAGS_14BITADDR 0 /* 14-bit buffer addresses */ | |
59 | #define RAW3270_FLAGS_BUSY 1 /* Device busy, leave it alone */ | |
60 | #define RAW3270_FLAGS_ATTN 2 /* Device sent an ATTN interrupt */ | |
61 | #define RAW3270_FLAGS_READY 4 /* Device is useable by views */ | |
62 | #define RAW3270_FLAGS_CONSOLE 8 /* Device is the console. */ | |
63 | ||
64 | /* Semaphore to protect global data of raw3270 (devices, views, etc). */ | |
14cc3e2b | 65 | static DEFINE_MUTEX(raw3270_mutex); |
1da177e4 LT |
66 | |
67 | /* List of 3270 devices. */ | |
68 | static struct list_head raw3270_devices = LIST_HEAD_INIT(raw3270_devices); | |
69 | ||
70 | /* | |
71 | * Flag to indicate if the driver has been registered. Some operations | |
72 | * like waiting for the end of i/o need to be done differently as long | |
73 | * as the kernel is still starting up (console support). | |
74 | */ | |
75 | static int raw3270_registered; | |
76 | ||
77 | /* Module parameters */ | |
78 | static int tubxcorrect = 0; | |
79 | module_param(tubxcorrect, bool, 0); | |
80 | ||
81 | /* | |
82 | * Wait queue for device init/delete, view delete. | |
83 | */ | |
84 | DECLARE_WAIT_QUEUE_HEAD(raw3270_wait_queue); | |
85 | ||
86 | /* | |
87 | * Encode array for 12 bit 3270 addresses. | |
88 | */ | |
89 | unsigned char raw3270_ebcgraf[64] = { | |
90 | 0x40, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, | |
91 | 0xc8, 0xc9, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, | |
92 | 0x50, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, | |
93 | 0xd8, 0xd9, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, | |
94 | 0x60, 0x61, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, | |
95 | 0xe8, 0xe9, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, | |
96 | 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, | |
97 | 0xf8, 0xf9, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f | |
98 | }; | |
99 | ||
100 | void | |
101 | raw3270_buffer_address(struct raw3270 *rp, char *cp, unsigned short addr) | |
102 | { | |
103 | if (test_bit(RAW3270_FLAGS_14BITADDR, &rp->flags)) { | |
104 | cp[0] = (addr >> 8) & 0x3f; | |
105 | cp[1] = addr & 0xff; | |
106 | } else { | |
107 | cp[0] = raw3270_ebcgraf[(addr >> 6) & 0x3f]; | |
108 | cp[1] = raw3270_ebcgraf[addr & 0x3f]; | |
109 | } | |
110 | } | |
111 | ||
112 | /* | |
113 | * Allocate a new 3270 ccw request | |
114 | */ | |
115 | struct raw3270_request * | |
116 | raw3270_request_alloc(size_t size) | |
117 | { | |
118 | struct raw3270_request *rq; | |
119 | ||
120 | /* Allocate request structure */ | |
88abaab4 | 121 | rq = kzalloc(sizeof(struct raw3270_request), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
122 | if (!rq) |
123 | return ERR_PTR(-ENOMEM); | |
1da177e4 LT |
124 | |
125 | /* alloc output buffer. */ | |
126 | if (size > 0) { | |
127 | rq->buffer = kmalloc(size, GFP_KERNEL | GFP_DMA); | |
128 | if (!rq->buffer) { | |
129 | kfree(rq); | |
130 | return ERR_PTR(-ENOMEM); | |
131 | } | |
132 | } | |
133 | rq->size = size; | |
134 | INIT_LIST_HEAD(&rq->list); | |
135 | ||
136 | /* | |
137 | * Setup ccw. | |
138 | */ | |
139 | rq->ccw.cda = __pa(rq->buffer); | |
140 | rq->ccw.flags = CCW_FLAG_SLI; | |
141 | ||
142 | return rq; | |
143 | } | |
144 | ||
145 | #ifdef CONFIG_TN3270_CONSOLE | |
146 | /* | |
147 | * Allocate a new 3270 ccw request from bootmem. Only works very | |
148 | * early in the boot process. Only con3270.c should be using this. | |
149 | */ | |
150 | struct raw3270_request * | |
151 | 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 | { | |
17fd682e | 188 | kfree(rq->buffer); |
1da177e4 LT |
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 | ||
ed3cb6f0 RH |
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 | ||
1da177e4 LT |
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.fctl & SCSW_FCTL_HALT_FUNC) { | |
376 | rq->rc = -EIO; | |
377 | rc = RAW3270_IO_DONE; | |
378 | } else if (irb->scsw.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.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 | ||
1da177e4 LT |
489 | static struct diag210 raw3270_init_diag210; |
490 | static DECLARE_MUTEX(raw3270_init_sem); | |
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.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.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.count; | |
516 | } | |
517 | if (irb->scsw.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 | wait_queue_head_t wq; | |
553 | int rc; | |
554 | ||
555 | #ifdef CONFIG_TN3270_CONSOLE | |
556 | if (raw3270_registered == 0) { | |
557 | spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); | |
d2c993d8 | 558 | rq->callback = NULL; |
1da177e4 LT |
559 | rc = __raw3270_start(rp, view, rq); |
560 | if (rc == 0) | |
561 | while (!raw3270_request_final(rq)) { | |
562 | wait_cons_dev(); | |
563 | barrier(); | |
564 | } | |
565 | spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); | |
566 | return rq->rc; | |
567 | } | |
568 | #endif | |
569 | init_waitqueue_head(&wq); | |
570 | rq->callback = raw3270_wake_init; | |
571 | rq->callback_data = &wq; | |
572 | spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); | |
573 | rc = __raw3270_start(rp, view, rq); | |
574 | spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); | |
575 | if (rc) | |
576 | return rc; | |
577 | /* Now wait for the completion. */ | |
578 | rc = wait_event_interruptible(wq, raw3270_request_final(rq)); | |
579 | if (rc == -ERESTARTSYS) { /* Interrupted by a signal. */ | |
580 | raw3270_halt_io(view->dev, rq); | |
581 | /* No wait for the halt to complete. */ | |
582 | wait_event(wq, raw3270_request_final(rq)); | |
583 | return -ERESTARTSYS; | |
584 | } | |
585 | return rq->rc; | |
586 | } | |
587 | ||
588 | static int | |
589 | __raw3270_size_device_vm(struct raw3270 *rp) | |
590 | { | |
591 | int rc, model; | |
592 | ||
593 | raw3270_init_diag210.vrdcdvno = | |
594 | _ccw_device_get_device_number(rp->cdev); | |
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 | */ | |
132fab13 MS |
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); | |
3863e724 | 658 | if (rc) |
1da177e4 | 659 | /* Check error cases: -ERESTARTSYS, -EIO and -EOPNOTSUPP */ |
1da177e4 | 660 | return rc; |
1da177e4 LT |
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 | */ | |
132fab13 MS |
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); | |
1da177e4 LT |
687 | if (rc) |
688 | return rc; | |
689 | /* Got a Query Reply */ | |
132fab13 MS |
690 | count = sizeof(rp->init_data) - rp->init_request.rescnt; |
691 | uap = (struct raw3270_ua *) (rp->init_data + 1); | |
1da177e4 | 692 | /* Paranoia check. */ |
132fab13 | 693 | if (rp->init_data[0] != 0x88 || uap->uab.qcode != 0x81) |
1da177e4 LT |
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 | down(&raw3270_init_sem); | |
716 | rp->view = &raw3270_init_view; | |
717 | raw3270_init_view.dev = rp; | |
3863e724 MS |
718 | if (MACHINE_IS_VM) |
719 | rc = __raw3270_size_device_vm(rp); | |
720 | else | |
721 | rc = __raw3270_size_device(rp); | |
d2c993d8 HC |
722 | raw3270_init_view.dev = NULL; |
723 | rp->view = NULL; | |
1da177e4 LT |
724 | up(&raw3270_init_sem); |
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; | |
3863e724 MS |
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; | |
1da177e4 LT |
742 | } |
743 | return rc; | |
744 | } | |
745 | ||
746 | static int | |
747 | raw3270_reset_device(struct raw3270 *rp) | |
748 | { | |
749 | int rc; | |
750 | ||
751 | down(&raw3270_init_sem); | |
132fab13 MS |
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); | |
1da177e4 LT |
761 | rp->view = &raw3270_init_view; |
762 | raw3270_init_view.dev = rp; | |
132fab13 | 763 | rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); |
d2c993d8 HC |
764 | raw3270_init_view.dev = NULL; |
765 | rp->view = NULL; | |
1da177e4 LT |
766 | up(&raw3270_init_sem); |
767 | return rc; | |
768 | } | |
769 | ||
ed3cb6f0 RH |
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 | ||
1da177e4 LT |
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 | |
ed3cb6f0 RH |
816 | * number for it. Note: there is no device with minor 0, |
817 | * see special case for fs3270.c:fs3270_open(). | |
1da177e4 | 818 | */ |
14cc3e2b | 819 | mutex_lock(&raw3270_mutex); |
1da177e4 | 820 | /* Keep the list sorted. */ |
ed3cb6f0 | 821 | minor = RAW3270_FIRSTMINOR; |
1da177e4 LT |
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 | } | |
ed3cb6f0 | 832 | if (rp->minor == -1 && minor < RAW3270_MAXDEVS + RAW3270_FIRSTMINOR) { |
1da177e4 LT |
833 | rp->minor = minor; |
834 | list_add_tail(&rp->list, &raw3270_devices); | |
835 | } | |
14cc3e2b | 836 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
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 * | |
851 | raw3270_setup_console(struct ccw_device *cdev) | |
852 | { | |
853 | struct raw3270 *rp; | |
854 | char *ascebc; | |
855 | int rc; | |
856 | ||
132fab13 | 857 | rp = (struct raw3270 *) alloc_bootmem_low(sizeof(struct raw3270)); |
1da177e4 LT |
858 | ascebc = (char *) alloc_bootmem(256); |
859 | rc = raw3270_setup_device(cdev, rp, ascebc); | |
860 | if (rc) | |
861 | return ERR_PTR(rc); | |
862 | set_bit(RAW3270_FLAGS_CONSOLE, &rp->flags); | |
863 | rc = raw3270_reset_device(rp); | |
864 | if (rc) | |
865 | return ERR_PTR(rc); | |
866 | rc = raw3270_size_device(rp); | |
867 | if (rc) | |
868 | return ERR_PTR(rc); | |
869 | rc = raw3270_reset_device(rp); | |
870 | if (rc) | |
871 | return ERR_PTR(rc); | |
872 | set_bit(RAW3270_FLAGS_READY, &rp->flags); | |
873 | return rp; | |
874 | } | |
875 | ||
876 | void | |
877 | raw3270_wait_cons_dev(struct raw3270 *rp) | |
878 | { | |
879 | unsigned long flags; | |
880 | ||
881 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
882 | wait_cons_dev(); | |
883 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
884 | } | |
885 | ||
886 | #endif | |
887 | ||
888 | /* | |
889 | * Create a 3270 device structure. | |
890 | */ | |
891 | static struct raw3270 * | |
892 | raw3270_create_device(struct ccw_device *cdev) | |
893 | { | |
894 | struct raw3270 *rp; | |
895 | char *ascebc; | |
896 | int rc; | |
897 | ||
132fab13 | 898 | rp = kmalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
899 | if (!rp) |
900 | return ERR_PTR(-ENOMEM); | |
901 | ascebc = kmalloc(256, GFP_KERNEL); | |
902 | if (!ascebc) { | |
903 | kfree(rp); | |
904 | return ERR_PTR(-ENOMEM); | |
905 | } | |
906 | rc = raw3270_setup_device(cdev, rp, ascebc); | |
907 | if (rc) { | |
908 | kfree(rp->ascebc); | |
909 | kfree(rp); | |
910 | rp = ERR_PTR(rc); | |
911 | } | |
912 | /* Get reference to ccw_device structure. */ | |
913 | get_device(&cdev->dev); | |
914 | return rp; | |
915 | } | |
916 | ||
917 | /* | |
918 | * Activate a view. | |
919 | */ | |
920 | int | |
921 | raw3270_activate_view(struct raw3270_view *view) | |
922 | { | |
923 | struct raw3270 *rp; | |
924 | struct raw3270_view *oldview, *nv; | |
925 | unsigned long flags; | |
926 | int rc; | |
927 | ||
928 | rp = view->dev; | |
929 | if (!rp) | |
930 | return -ENODEV; | |
931 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
932 | if (rp->view == view) | |
933 | rc = 0; | |
934 | else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) | |
935 | rc = -ENODEV; | |
936 | else { | |
d2c993d8 | 937 | oldview = NULL; |
1da177e4 LT |
938 | if (rp->view) { |
939 | oldview = rp->view; | |
940 | oldview->fn->deactivate(oldview); | |
941 | } | |
942 | rp->view = view; | |
943 | rc = view->fn->activate(view); | |
944 | if (rc) { | |
945 | /* Didn't work. Try to reactivate the old view. */ | |
946 | rp->view = oldview; | |
947 | if (!oldview || oldview->fn->activate(oldview) != 0) { | |
948 | /* Didn't work as well. Try any other view. */ | |
949 | list_for_each_entry(nv, &rp->view_list, list) | |
950 | if (nv != view && nv != oldview) { | |
951 | rp->view = nv; | |
952 | if (nv->fn->activate(nv) == 0) | |
953 | break; | |
d2c993d8 | 954 | rp->view = NULL; |
1da177e4 LT |
955 | } |
956 | } | |
957 | } | |
958 | } | |
959 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
960 | return rc; | |
961 | } | |
962 | ||
963 | /* | |
964 | * Deactivate current view. | |
965 | */ | |
966 | void | |
967 | raw3270_deactivate_view(struct raw3270_view *view) | |
968 | { | |
969 | unsigned long flags; | |
970 | struct raw3270 *rp; | |
971 | ||
972 | rp = view->dev; | |
973 | if (!rp) | |
974 | return; | |
975 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
976 | if (rp->view == view) { | |
977 | view->fn->deactivate(view); | |
d2c993d8 | 978 | rp->view = NULL; |
1da177e4 LT |
979 | /* Move deactivated view to end of list. */ |
980 | list_del_init(&view->list); | |
981 | list_add_tail(&view->list, &rp->view_list); | |
982 | /* Try to activate another view. */ | |
983 | if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) { | |
ed3cb6f0 RH |
984 | list_for_each_entry(view, &rp->view_list, list) { |
985 | rp->view = view; | |
986 | if (view->fn->activate(view) == 0) | |
1da177e4 | 987 | break; |
d2c993d8 | 988 | rp->view = NULL; |
ed3cb6f0 | 989 | } |
1da177e4 LT |
990 | } |
991 | } | |
992 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
993 | } | |
994 | ||
995 | /* | |
996 | * Add view to device with minor "minor". | |
997 | */ | |
998 | int | |
999 | raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn, int minor) | |
1000 | { | |
1001 | unsigned long flags; | |
1002 | struct raw3270 *rp; | |
1003 | int rc; | |
1004 | ||
ed3cb6f0 RH |
1005 | if (minor <= 0) |
1006 | return -ENODEV; | |
14cc3e2b | 1007 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1008 | rc = -ENODEV; |
1009 | list_for_each_entry(rp, &raw3270_devices, list) { | |
1010 | if (rp->minor != minor) | |
1011 | continue; | |
1012 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1013 | if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) { | |
1014 | atomic_set(&view->ref_count, 2); | |
1015 | view->dev = rp; | |
1016 | view->fn = fn; | |
1017 | view->model = rp->model; | |
1018 | view->rows = rp->rows; | |
1019 | view->cols = rp->cols; | |
1020 | view->ascebc = rp->ascebc; | |
1021 | spin_lock_init(&view->lock); | |
ed3cb6f0 | 1022 | list_add(&view->list, &rp->view_list); |
1da177e4 LT |
1023 | rc = 0; |
1024 | } | |
1025 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1026 | break; | |
1027 | } | |
14cc3e2b | 1028 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1029 | return rc; |
1030 | } | |
1031 | ||
1032 | /* | |
1033 | * Find specific view of device with minor "minor". | |
1034 | */ | |
1035 | struct raw3270_view * | |
1036 | raw3270_find_view(struct raw3270_fn *fn, int minor) | |
1037 | { | |
1038 | struct raw3270 *rp; | |
1039 | struct raw3270_view *view, *tmp; | |
1040 | unsigned long flags; | |
1041 | ||
14cc3e2b | 1042 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1043 | view = ERR_PTR(-ENODEV); |
1044 | list_for_each_entry(rp, &raw3270_devices, list) { | |
1045 | if (rp->minor != minor) | |
1046 | continue; | |
1047 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1048 | if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) { | |
1049 | view = ERR_PTR(-ENOENT); | |
1050 | list_for_each_entry(tmp, &rp->view_list, list) { | |
1051 | if (tmp->fn == fn) { | |
1052 | raw3270_get_view(tmp); | |
1053 | view = tmp; | |
1054 | break; | |
1055 | } | |
1056 | } | |
1057 | } | |
1058 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1059 | break; | |
1060 | } | |
14cc3e2b | 1061 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1062 | return view; |
1063 | } | |
1064 | ||
1065 | /* | |
1066 | * Remove view from device and free view structure via call to view->fn->free. | |
1067 | */ | |
1068 | void | |
1069 | raw3270_del_view(struct raw3270_view *view) | |
1070 | { | |
1071 | unsigned long flags; | |
1072 | struct raw3270 *rp; | |
1073 | struct raw3270_view *nv; | |
1074 | ||
1075 | rp = view->dev; | |
1076 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1077 | if (rp->view == view) { | |
1078 | view->fn->deactivate(view); | |
d2c993d8 | 1079 | rp->view = NULL; |
1da177e4 LT |
1080 | } |
1081 | list_del_init(&view->list); | |
1082 | if (!rp->view && test_bit(RAW3270_FLAGS_READY, &rp->flags)) { | |
1083 | /* Try to activate another view. */ | |
1084 | list_for_each_entry(nv, &rp->view_list, list) { | |
ed3cb6f0 | 1085 | if (nv->fn->activate(nv) == 0) { |
1da177e4 LT |
1086 | rp->view = nv; |
1087 | break; | |
1088 | } | |
1089 | } | |
1090 | } | |
1091 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1092 | /* Wait for reference counter to drop to zero. */ | |
1093 | atomic_dec(&view->ref_count); | |
1094 | wait_event(raw3270_wait_queue, atomic_read(&view->ref_count) == 0); | |
1095 | if (view->fn->free) | |
1096 | view->fn->free(view); | |
1097 | } | |
1098 | ||
1099 | /* | |
1100 | * Remove a 3270 device structure. | |
1101 | */ | |
1102 | static void | |
1103 | raw3270_delete_device(struct raw3270 *rp) | |
1104 | { | |
1105 | struct ccw_device *cdev; | |
1106 | ||
1107 | /* Remove from device chain. */ | |
14cc3e2b | 1108 | mutex_lock(&raw3270_mutex); |
ed3cb6f0 RH |
1109 | if (rp->clttydev) |
1110 | class_device_destroy(class3270, | |
1111 | MKDEV(IBM_TTY3270_MAJOR, rp->minor)); | |
1112 | if (rp->cltubdev) | |
1113 | class_device_destroy(class3270, | |
1114 | MKDEV(IBM_FS3270_MAJOR, rp->minor)); | |
1da177e4 | 1115 | list_del_init(&rp->list); |
14cc3e2b | 1116 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1117 | |
1118 | /* Disconnect from ccw_device. */ | |
1119 | cdev = rp->cdev; | |
d2c993d8 HC |
1120 | rp->cdev = NULL; |
1121 | cdev->dev.driver_data = NULL; | |
1122 | cdev->handler = NULL; | |
1da177e4 LT |
1123 | |
1124 | /* Put ccw_device structure. */ | |
1125 | put_device(&cdev->dev); | |
1126 | ||
1127 | /* Now free raw3270 structure. */ | |
1128 | kfree(rp->ascebc); | |
1129 | kfree(rp); | |
1130 | } | |
1131 | ||
1132 | static int | |
1133 | raw3270_probe (struct ccw_device *cdev) | |
1134 | { | |
1135 | return 0; | |
1136 | } | |
1137 | ||
1138 | /* | |
1139 | * Additional attributes for a 3270 device | |
1140 | */ | |
1141 | static ssize_t | |
3fd3c0a5 | 1142 | raw3270_model_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1143 | { |
1144 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
1145 | ((struct raw3270 *) dev->driver_data)->model); | |
1146 | } | |
d2c993d8 | 1147 | static DEVICE_ATTR(model, 0444, raw3270_model_show, NULL); |
1da177e4 LT |
1148 | |
1149 | static ssize_t | |
3fd3c0a5 | 1150 | raw3270_rows_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1151 | { |
1152 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
1153 | ((struct raw3270 *) dev->driver_data)->rows); | |
1154 | } | |
d2c993d8 | 1155 | static DEVICE_ATTR(rows, 0444, raw3270_rows_show, NULL); |
1da177e4 LT |
1156 | |
1157 | static ssize_t | |
3fd3c0a5 | 1158 | raw3270_columns_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1159 | { |
1160 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
1161 | ((struct raw3270 *) dev->driver_data)->cols); | |
1162 | } | |
d2c993d8 | 1163 | static DEVICE_ATTR(columns, 0444, raw3270_columns_show, NULL); |
1da177e4 LT |
1164 | |
1165 | static struct attribute * raw3270_attrs[] = { | |
1166 | &dev_attr_model.attr, | |
1167 | &dev_attr_rows.attr, | |
1168 | &dev_attr_columns.attr, | |
1169 | NULL, | |
1170 | }; | |
1171 | ||
1172 | static struct attribute_group raw3270_attr_group = { | |
1173 | .attrs = raw3270_attrs, | |
1174 | }; | |
1175 | ||
1176 | static void | |
1177 | raw3270_create_attributes(struct raw3270 *rp) | |
1178 | { | |
1179 | //FIXME: check return code | |
1180 | sysfs_create_group(&rp->cdev->dev.kobj, &raw3270_attr_group); | |
ed3cb6f0 | 1181 | rp->clttydev = |
fc71fe40 | 1182 | class_device_create(class3270, NULL, |
ed3cb6f0 RH |
1183 | MKDEV(IBM_TTY3270_MAJOR, rp->minor), |
1184 | &rp->cdev->dev, "tty%s", | |
1185 | rp->cdev->dev.bus_id); | |
1186 | rp->cltubdev = | |
fc71fe40 | 1187 | class_device_create(class3270, NULL, |
ed3cb6f0 RH |
1188 | MKDEV(IBM_FS3270_MAJOR, rp->minor), |
1189 | &rp->cdev->dev, "tub%s", | |
1190 | rp->cdev->dev.bus_id); | |
1da177e4 LT |
1191 | } |
1192 | ||
1193 | /* | |
1194 | * Notifier for device addition/removal | |
1195 | */ | |
1196 | struct raw3270_notifier { | |
1197 | struct list_head list; | |
1198 | void (*notifier)(int, int); | |
1199 | }; | |
1200 | ||
1201 | static struct list_head raw3270_notifier = LIST_HEAD_INIT(raw3270_notifier); | |
1202 | ||
1203 | int raw3270_register_notifier(void (*notifier)(int, int)) | |
1204 | { | |
1205 | struct raw3270_notifier *np; | |
1206 | struct raw3270 *rp; | |
1207 | ||
1208 | np = kmalloc(sizeof(struct raw3270_notifier), GFP_KERNEL); | |
1209 | if (!np) | |
1210 | return -ENOMEM; | |
1211 | np->notifier = notifier; | |
14cc3e2b | 1212 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1213 | list_add_tail(&np->list, &raw3270_notifier); |
1214 | list_for_each_entry(rp, &raw3270_devices, list) { | |
1215 | get_device(&rp->cdev->dev); | |
1216 | notifier(rp->minor, 1); | |
1217 | } | |
14cc3e2b | 1218 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1219 | return 0; |
1220 | } | |
1221 | ||
1222 | void raw3270_unregister_notifier(void (*notifier)(int, int)) | |
1223 | { | |
1224 | struct raw3270_notifier *np; | |
1225 | ||
14cc3e2b | 1226 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1227 | list_for_each_entry(np, &raw3270_notifier, list) |
1228 | if (np->notifier == notifier) { | |
1229 | list_del(&np->list); | |
1230 | kfree(np); | |
1231 | break; | |
1232 | } | |
14cc3e2b | 1233 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1234 | } |
1235 | ||
1236 | /* | |
1237 | * Set 3270 device online. | |
1238 | */ | |
1239 | static int | |
1240 | raw3270_set_online (struct ccw_device *cdev) | |
1241 | { | |
1242 | struct raw3270 *rp; | |
1243 | struct raw3270_notifier *np; | |
1244 | int rc; | |
1245 | ||
1246 | rp = raw3270_create_device(cdev); | |
1247 | if (IS_ERR(rp)) | |
1248 | return PTR_ERR(rp); | |
1249 | rc = raw3270_reset_device(rp); | |
1250 | if (rc) | |
ed3cb6f0 | 1251 | goto failure; |
1da177e4 LT |
1252 | rc = raw3270_size_device(rp); |
1253 | if (rc) | |
ed3cb6f0 | 1254 | goto failure; |
1da177e4 LT |
1255 | rc = raw3270_reset_device(rp); |
1256 | if (rc) | |
ed3cb6f0 | 1257 | goto failure; |
1da177e4 LT |
1258 | raw3270_create_attributes(rp); |
1259 | set_bit(RAW3270_FLAGS_READY, &rp->flags); | |
14cc3e2b | 1260 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1261 | list_for_each_entry(np, &raw3270_notifier, list) |
1262 | np->notifier(rp->minor, 1); | |
14cc3e2b | 1263 | mutex_unlock(&raw3270_mutex); |
1da177e4 | 1264 | return 0; |
ed3cb6f0 RH |
1265 | |
1266 | failure: | |
1267 | raw3270_delete_device(rp); | |
1268 | return rc; | |
1da177e4 LT |
1269 | } |
1270 | ||
1271 | /* | |
1272 | * Remove 3270 device structure. | |
1273 | */ | |
1274 | static void | |
1275 | raw3270_remove (struct ccw_device *cdev) | |
1276 | { | |
1277 | unsigned long flags; | |
1278 | struct raw3270 *rp; | |
1279 | struct raw3270_view *v; | |
1280 | struct raw3270_notifier *np; | |
1281 | ||
1282 | rp = cdev->dev.driver_data; | |
ed3cb6f0 RH |
1283 | /* |
1284 | * _remove is the opposite of _probe; it's probe that | |
1285 | * should set up rp. raw3270_remove gets entered for | |
1286 | * devices even if they haven't been varied online. | |
1287 | * Thus, rp may validly be NULL here. | |
1288 | */ | |
1289 | if (rp == NULL) | |
1290 | return; | |
1da177e4 LT |
1291 | clear_bit(RAW3270_FLAGS_READY, &rp->flags); |
1292 | ||
1293 | sysfs_remove_group(&cdev->dev.kobj, &raw3270_attr_group); | |
1294 | ||
1295 | /* Deactivate current view and remove all views. */ | |
1296 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); | |
1297 | if (rp->view) { | |
1298 | rp->view->fn->deactivate(rp->view); | |
d2c993d8 | 1299 | rp->view = NULL; |
1da177e4 LT |
1300 | } |
1301 | while (!list_empty(&rp->view_list)) { | |
1302 | v = list_entry(rp->view_list.next, struct raw3270_view, list); | |
1303 | if (v->fn->release) | |
1304 | v->fn->release(v); | |
1305 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1306 | raw3270_del_view(v); | |
1307 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); | |
1308 | } | |
1309 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1310 | ||
14cc3e2b | 1311 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1312 | list_for_each_entry(np, &raw3270_notifier, list) |
1313 | np->notifier(rp->minor, 0); | |
14cc3e2b | 1314 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1315 | |
1316 | /* Reset 3270 device. */ | |
1317 | raw3270_reset_device(rp); | |
1318 | /* And finally remove it. */ | |
1319 | raw3270_delete_device(rp); | |
1320 | } | |
1321 | ||
1322 | /* | |
1323 | * Set 3270 device offline. | |
1324 | */ | |
1325 | static int | |
1326 | raw3270_set_offline (struct ccw_device *cdev) | |
1327 | { | |
1328 | struct raw3270 *rp; | |
1329 | ||
1330 | rp = cdev->dev.driver_data; | |
1331 | if (test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) | |
1332 | return -EBUSY; | |
1333 | raw3270_remove(cdev); | |
1334 | return 0; | |
1335 | } | |
1336 | ||
1337 | static struct ccw_device_id raw3270_id[] = { | |
1338 | { CCW_DEVICE(0x3270, 0) }, | |
1339 | { CCW_DEVICE(0x3271, 0) }, | |
1340 | { CCW_DEVICE(0x3272, 0) }, | |
1341 | { CCW_DEVICE(0x3273, 0) }, | |
1342 | { CCW_DEVICE(0x3274, 0) }, | |
1343 | { CCW_DEVICE(0x3275, 0) }, | |
1344 | { CCW_DEVICE(0x3276, 0) }, | |
1345 | { CCW_DEVICE(0x3277, 0) }, | |
1346 | { CCW_DEVICE(0x3278, 0) }, | |
1347 | { CCW_DEVICE(0x3279, 0) }, | |
1348 | { CCW_DEVICE(0x3174, 0) }, | |
1349 | { /* end of list */ }, | |
1350 | }; | |
1351 | ||
1352 | static struct ccw_driver raw3270_ccw_driver = { | |
1353 | .name = "3270", | |
1354 | .owner = THIS_MODULE, | |
1355 | .ids = raw3270_id, | |
1356 | .probe = &raw3270_probe, | |
1357 | .remove = &raw3270_remove, | |
1358 | .set_online = &raw3270_set_online, | |
1359 | .set_offline = &raw3270_set_offline, | |
1360 | }; | |
1361 | ||
1362 | static int | |
1363 | raw3270_init(void) | |
1364 | { | |
1365 | struct raw3270 *rp; | |
1366 | int rc; | |
1367 | ||
1368 | if (raw3270_registered) | |
1369 | return 0; | |
1370 | raw3270_registered = 1; | |
1371 | rc = ccw_driver_register(&raw3270_ccw_driver); | |
1372 | if (rc == 0) { | |
1373 | /* Create attributes for early (= console) device. */ | |
14cc3e2b | 1374 | mutex_lock(&raw3270_mutex); |
ed3cb6f0 | 1375 | class3270 = class_create(THIS_MODULE, "3270"); |
1da177e4 LT |
1376 | list_for_each_entry(rp, &raw3270_devices, list) { |
1377 | get_device(&rp->cdev->dev); | |
1378 | raw3270_create_attributes(rp); | |
1379 | } | |
14cc3e2b | 1380 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1381 | } |
1382 | return rc; | |
1383 | } | |
1384 | ||
1385 | static void | |
1386 | raw3270_exit(void) | |
1387 | { | |
1388 | ccw_driver_unregister(&raw3270_ccw_driver); | |
ed3cb6f0 | 1389 | class_destroy(class3270); |
1da177e4 LT |
1390 | } |
1391 | ||
1392 | MODULE_LICENSE("GPL"); | |
1393 | ||
1394 | module_init(raw3270_init); | |
1395 | module_exit(raw3270_exit); | |
1396 | ||
1397 | EXPORT_SYMBOL(raw3270_request_alloc); | |
1398 | EXPORT_SYMBOL(raw3270_request_free); | |
1399 | EXPORT_SYMBOL(raw3270_request_reset); | |
1400 | EXPORT_SYMBOL(raw3270_request_set_cmd); | |
1401 | EXPORT_SYMBOL(raw3270_request_add_data); | |
1402 | EXPORT_SYMBOL(raw3270_request_set_data); | |
1403 | EXPORT_SYMBOL(raw3270_request_set_idal); | |
1404 | EXPORT_SYMBOL(raw3270_buffer_address); | |
1405 | EXPORT_SYMBOL(raw3270_add_view); | |
1406 | EXPORT_SYMBOL(raw3270_del_view); | |
1407 | EXPORT_SYMBOL(raw3270_find_view); | |
1408 | EXPORT_SYMBOL(raw3270_activate_view); | |
1409 | EXPORT_SYMBOL(raw3270_deactivate_view); | |
1410 | EXPORT_SYMBOL(raw3270_start); | |
ed3cb6f0 | 1411 | EXPORT_SYMBOL(raw3270_start_locked); |
1da177e4 | 1412 | EXPORT_SYMBOL(raw3270_start_irq); |
ed3cb6f0 | 1413 | EXPORT_SYMBOL(raw3270_reset); |
1da177e4 LT |
1414 | EXPORT_SYMBOL(raw3270_register_notifier); |
1415 | EXPORT_SYMBOL(raw3270_unregister_notifier); | |
1416 | EXPORT_SYMBOL(raw3270_wait_queue); |