Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
4b214a0c | 2 | * IBM/3270 Driver - core functions. |
1da177e4 | 3 | * |
4b214a0c MS |
4 | * Author(s): |
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 | |
1da177e4 LT |
8 | */ |
9 | ||
1da177e4 LT |
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> | |
18 | ||
19 | #include <asm/ccwdev.h> | |
20 | #include <asm/cio.h> | |
21 | #include <asm/ebcdic.h> | |
0a87c5cf | 22 | #include <asm/diag.h> |
1da177e4 LT |
23 | |
24 | #include "raw3270.h" | |
25 | ||
ed3cb6f0 RH |
26 | #include <linux/major.h> |
27 | #include <linux/kdev_t.h> | |
28 | #include <linux/device.h> | |
14cc3e2b | 29 | #include <linux/mutex.h> |
ed3cb6f0 | 30 | |
c95571e6 | 31 | struct class *class3270; |
ed3cb6f0 | 32 | |
1da177e4 LT |
33 | /* The main 3270 data structure. */ |
34 | struct raw3270 { | |
35 | struct list_head list; | |
36 | struct ccw_device *cdev; | |
37 | int minor; | |
38 | ||
39 | short model, rows, cols; | |
4d334fd1 | 40 | unsigned int state; |
1da177e4 LT |
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 */ | |
132fab13 | 50 | |
4d334fd1 MS |
51 | struct raw3270_view init_view; |
52 | struct raw3270_request init_reset; | |
53 | struct raw3270_request init_readpart; | |
54 | struct raw3270_request init_readmod; | |
132fab13 | 55 | unsigned char init_data[256]; |
1da177e4 LT |
56 | }; |
57 | ||
4d334fd1 MS |
58 | /* raw3270->state */ |
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 */ | |
64 | ||
1da177e4 LT |
65 | /* raw3270->flags */ |
66 | #define RAW3270_FLAGS_14BITADDR 0 /* 14-bit buffer addresses */ | |
67 | #define RAW3270_FLAGS_BUSY 1 /* Device busy, leave it alone */ | |
4d334fd1 MS |
68 | #define RAW3270_FLAGS_CONSOLE 2 /* Device is the console. */ |
69 | #define RAW3270_FLAGS_FROZEN 3 /* set if 3270 is frozen for suspend */ | |
1da177e4 LT |
70 | |
71 | /* Semaphore to protect global data of raw3270 (devices, views, etc). */ | |
14cc3e2b | 72 | static DEFINE_MUTEX(raw3270_mutex); |
1da177e4 LT |
73 | |
74 | /* List of 3270 devices. */ | |
c11ca97e | 75 | static LIST_HEAD(raw3270_devices); |
1da177e4 LT |
76 | |
77 | /* | |
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). | |
81 | */ | |
82 | static int raw3270_registered; | |
83 | ||
84 | /* Module parameters */ | |
90ab5ee9 | 85 | static bool tubxcorrect = 0; |
1da177e4 LT |
86 | module_param(tubxcorrect, bool, 0); |
87 | ||
88 | /* | |
89 | * Wait queue for device init/delete, view delete. | |
90 | */ | |
91 | DECLARE_WAIT_QUEUE_HEAD(raw3270_wait_queue); | |
92 | ||
93 | /* | |
94 | * Encode array for 12 bit 3270 addresses. | |
95 | */ | |
2b67fc46 | 96 | static unsigned char raw3270_ebcgraf[64] = { |
1da177e4 LT |
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 | |
105 | }; | |
106 | ||
4d334fd1 MS |
107 | static inline int raw3270_state_ready(struct raw3270 *rp) |
108 | { | |
109 | return rp->state == RAW3270_STATE_READY; | |
110 | } | |
111 | ||
112 | static inline int raw3270_state_final(struct raw3270 *rp) | |
113 | { | |
114 | return rp->state == RAW3270_STATE_INIT || | |
115 | rp->state == RAW3270_STATE_READY; | |
116 | } | |
117 | ||
1da177e4 LT |
118 | void |
119 | raw3270_buffer_address(struct raw3270 *rp, char *cp, unsigned short addr) | |
120 | { | |
121 | if (test_bit(RAW3270_FLAGS_14BITADDR, &rp->flags)) { | |
122 | cp[0] = (addr >> 8) & 0x3f; | |
123 | cp[1] = addr & 0xff; | |
124 | } else { | |
125 | cp[0] = raw3270_ebcgraf[(addr >> 6) & 0x3f]; | |
126 | cp[1] = raw3270_ebcgraf[addr & 0x3f]; | |
127 | } | |
128 | } | |
129 | ||
130 | /* | |
131 | * Allocate a new 3270 ccw request | |
132 | */ | |
133 | struct raw3270_request * | |
134 | raw3270_request_alloc(size_t size) | |
135 | { | |
136 | struct raw3270_request *rq; | |
137 | ||
138 | /* Allocate request structure */ | |
88abaab4 | 139 | rq = kzalloc(sizeof(struct raw3270_request), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
140 | if (!rq) |
141 | return ERR_PTR(-ENOMEM); | |
1da177e4 LT |
142 | |
143 | /* alloc output buffer. */ | |
144 | if (size > 0) { | |
145 | rq->buffer = kmalloc(size, GFP_KERNEL | GFP_DMA); | |
146 | if (!rq->buffer) { | |
147 | kfree(rq); | |
148 | return ERR_PTR(-ENOMEM); | |
149 | } | |
150 | } | |
151 | rq->size = size; | |
152 | INIT_LIST_HEAD(&rq->list); | |
153 | ||
154 | /* | |
155 | * Setup ccw. | |
156 | */ | |
157 | rq->ccw.cda = __pa(rq->buffer); | |
158 | rq->ccw.flags = CCW_FLAG_SLI; | |
159 | ||
160 | return rq; | |
161 | } | |
162 | ||
1da177e4 LT |
163 | /* |
164 | * Free 3270 ccw request | |
165 | */ | |
166 | void | |
167 | raw3270_request_free (struct raw3270_request *rq) | |
168 | { | |
17fd682e | 169 | kfree(rq->buffer); |
1da177e4 LT |
170 | kfree(rq); |
171 | } | |
172 | ||
173 | /* | |
174 | * Reset request to initial state. | |
175 | */ | |
176 | void | |
177 | raw3270_request_reset(struct raw3270_request *rq) | |
178 | { | |
179 | BUG_ON(!list_empty(&rq->list)); | |
180 | rq->ccw.cmd_code = 0; | |
181 | rq->ccw.count = 0; | |
182 | rq->ccw.cda = __pa(rq->buffer); | |
183 | rq->ccw.flags = CCW_FLAG_SLI; | |
184 | rq->rescnt = 0; | |
185 | rq->rc = 0; | |
186 | } | |
187 | ||
188 | /* | |
189 | * Set command code to ccw of a request. | |
190 | */ | |
191 | void | |
192 | raw3270_request_set_cmd(struct raw3270_request *rq, u8 cmd) | |
193 | { | |
194 | rq->ccw.cmd_code = cmd; | |
195 | } | |
196 | ||
197 | /* | |
198 | * Add data fragment to output buffer. | |
199 | */ | |
200 | int | |
201 | raw3270_request_add_data(struct raw3270_request *rq, void *data, size_t size) | |
202 | { | |
203 | if (size + rq->ccw.count > rq->size) | |
204 | return -E2BIG; | |
205 | memcpy(rq->buffer + rq->ccw.count, data, size); | |
206 | rq->ccw.count += size; | |
207 | return 0; | |
208 | } | |
209 | ||
210 | /* | |
211 | * Set address/length pair to ccw of a request. | |
212 | */ | |
213 | void | |
214 | raw3270_request_set_data(struct raw3270_request *rq, void *data, size_t size) | |
215 | { | |
216 | rq->ccw.cda = __pa(data); | |
217 | rq->ccw.count = size; | |
218 | } | |
219 | ||
220 | /* | |
221 | * Set idal buffer to ccw of a request. | |
222 | */ | |
223 | void | |
224 | raw3270_request_set_idal(struct raw3270_request *rq, struct idal_buffer *ib) | |
225 | { | |
226 | rq->ccw.cda = __pa(ib->data); | |
227 | rq->ccw.count = ib->size; | |
228 | rq->ccw.flags |= CCW_FLAG_IDA; | |
229 | } | |
230 | ||
231 | /* | |
232 | * Stop running ccw. | |
233 | */ | |
234 | static int | |
4d334fd1 | 235 | __raw3270_halt_io(struct raw3270 *rp, struct raw3270_request *rq) |
1da177e4 LT |
236 | { |
237 | int retries; | |
238 | int rc; | |
239 | ||
240 | if (raw3270_request_final(rq)) | |
241 | return 0; | |
242 | /* Check if interrupt has already been processed */ | |
243 | for (retries = 0; retries < 5; retries++) { | |
244 | if (retries < 2) | |
245 | rc = ccw_device_halt(rp->cdev, (long) rq); | |
246 | else | |
247 | rc = ccw_device_clear(rp->cdev, (long) rq); | |
248 | if (rc == 0) | |
249 | break; /* termination successful */ | |
250 | } | |
251 | return rc; | |
252 | } | |
253 | ||
1da177e4 LT |
254 | /* |
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. | |
257 | */ | |
258 | static int | |
259 | __raw3270_start(struct raw3270 *rp, struct raw3270_view *view, | |
260 | struct raw3270_request *rq) | |
261 | { | |
262 | rq->view = view; | |
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); | |
269 | if (rq->rc) { | |
270 | raw3270_put_view(view); | |
271 | return rq->rc; | |
272 | } | |
273 | } | |
274 | list_add_tail(&rq->list, &rp->req_queue); | |
275 | return 0; | |
233faec9 MS |
276 | } |
277 | ||
278 | int | |
279 | raw3270_view_active(struct raw3270_view *view) | |
280 | { | |
281 | struct raw3270 *rp = view->dev; | |
282 | ||
283 | return rp && rp->view == view && | |
284 | !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags); | |
1da177e4 LT |
285 | } |
286 | ||
287 | int | |
288 | raw3270_start(struct raw3270_view *view, struct raw3270_request *rq) | |
289 | { | |
290 | unsigned long flags; | |
291 | struct raw3270 *rp; | |
292 | int rc; | |
293 | ||
294 | spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); | |
295 | rp = view->dev; | |
4b214a0c MS |
296 | if (!rp || rp->view != view || |
297 | test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
1da177e4 | 298 | rc = -EACCES; |
4d334fd1 MS |
299 | else if (!raw3270_state_ready(rp)) |
300 | rc = -EBUSY; | |
1da177e4 LT |
301 | else |
302 | rc = __raw3270_start(rp, view, rq); | |
303 | spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); | |
304 | return rc; | |
305 | } | |
306 | ||
ed3cb6f0 RH |
307 | int |
308 | raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq) | |
309 | { | |
310 | struct raw3270 *rp; | |
311 | int rc; | |
312 | ||
313 | rp = view->dev; | |
4b214a0c MS |
314 | if (!rp || rp->view != view || |
315 | test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
ed3cb6f0 | 316 | rc = -EACCES; |
4d334fd1 MS |
317 | else if (!raw3270_state_ready(rp)) |
318 | rc = -EBUSY; | |
ed3cb6f0 RH |
319 | else |
320 | rc = __raw3270_start(rp, view, rq); | |
321 | return rc; | |
322 | } | |
323 | ||
1da177e4 LT |
324 | int |
325 | raw3270_start_irq(struct raw3270_view *view, struct raw3270_request *rq) | |
326 | { | |
327 | struct raw3270 *rp; | |
328 | ||
329 | rp = view->dev; | |
330 | rq->view = view; | |
331 | raw3270_get_view(view); | |
332 | list_add_tail(&rq->list, &rp->req_queue); | |
333 | return 0; | |
334 | } | |
335 | ||
336 | /* | |
337 | * 3270 interrupt routine, called from the ccw_device layer | |
338 | */ | |
339 | static void | |
340 | raw3270_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb) | |
341 | { | |
342 | struct raw3270 *rp; | |
343 | struct raw3270_view *view; | |
344 | struct raw3270_request *rq; | |
345 | int rc; | |
346 | ||
dff59b64 | 347 | rp = dev_get_drvdata(&cdev->dev); |
1da177e4 LT |
348 | if (!rp) |
349 | return; | |
350 | rq = (struct raw3270_request *) intparm; | |
351 | view = rq ? rq->view : rp->view; | |
352 | ||
353 | if (IS_ERR(irb)) | |
354 | rc = RAW3270_IO_RETRY; | |
23d805b6 | 355 | else if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) { |
1da177e4 LT |
356 | rq->rc = -EIO; |
357 | rc = RAW3270_IO_DONE; | |
23d805b6 PO |
358 | } else if (irb->scsw.cmd.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END | |
359 | DEV_STAT_UNIT_EXCEP)) { | |
1da177e4 LT |
360 | /* Handle CE-DE-UE and subsequent UDE */ |
361 | set_bit(RAW3270_FLAGS_BUSY, &rp->flags); | |
362 | rc = RAW3270_IO_BUSY; | |
363 | } else if (test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) { | |
364 | /* Wait for UDE if busy flag is set. */ | |
23d805b6 | 365 | if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { |
1da177e4 LT |
366 | clear_bit(RAW3270_FLAGS_BUSY, &rp->flags); |
367 | /* Got it, now retry. */ | |
368 | rc = RAW3270_IO_RETRY; | |
369 | } else | |
370 | rc = RAW3270_IO_BUSY; | |
371 | } else if (view) | |
372 | rc = view->fn->intv(view, rq, irb); | |
373 | else | |
374 | rc = RAW3270_IO_DONE; | |
375 | ||
376 | switch (rc) { | |
377 | case RAW3270_IO_DONE: | |
378 | break; | |
379 | case RAW3270_IO_BUSY: | |
380 | /* | |
381 | * Intervention required by the operator. We have to wait | |
382 | * for unsolicited device end. | |
383 | */ | |
384 | return; | |
385 | case RAW3270_IO_RETRY: | |
386 | if (!rq) | |
387 | break; | |
388 | rq->rc = ccw_device_start(rp->cdev, &rq->ccw, | |
389 | (unsigned long) rq, 0, 0); | |
390 | if (rq->rc == 0) | |
3ad2f3fb | 391 | return; /* Successfully restarted. */ |
1da177e4 LT |
392 | break; |
393 | case RAW3270_IO_STOP: | |
394 | if (!rq) | |
395 | break; | |
4d334fd1 | 396 | __raw3270_halt_io(rp, rq); |
1da177e4 LT |
397 | rq->rc = -EIO; |
398 | break; | |
399 | default: | |
400 | BUG(); | |
401 | } | |
402 | if (rq) { | |
403 | BUG_ON(list_empty(&rq->list)); | |
404 | /* The request completed, remove from queue and do callback. */ | |
405 | list_del_init(&rq->list); | |
406 | if (rq->callback) | |
407 | rq->callback(rq, rq->callback_data); | |
408 | /* Do put_device for get_device in raw3270_start. */ | |
409 | raw3270_put_view(view); | |
410 | } | |
411 | /* | |
412 | * Try to start each request on request queue until one is | |
413 | * started successful. | |
414 | */ | |
415 | while (!list_empty(&rp->req_queue)) { | |
416 | rq = list_entry(rp->req_queue.next,struct raw3270_request,list); | |
417 | rq->rc = ccw_device_start(rp->cdev, &rq->ccw, | |
418 | (unsigned long) rq, 0, 0); | |
419 | if (rq->rc == 0) | |
420 | break; | |
421 | /* Start failed. Remove request and do callback. */ | |
422 | list_del_init(&rq->list); | |
423 | if (rq->callback) | |
424 | rq->callback(rq, rq->callback_data); | |
425 | /* Do put_device for get_device in raw3270_start. */ | |
426 | raw3270_put_view(view); | |
427 | } | |
428 | } | |
429 | ||
430 | /* | |
4d334fd1 MS |
431 | * To determine the size of the 3270 device we need to do: |
432 | * 1) send a 'read partition' data stream to the device | |
433 | * 2) wait for the attn interrupt that precedes the query reply | |
434 | * 3) do a read modified to get the query reply | |
435 | * To make things worse we have to cope with intervention | |
436 | * required (3270 device switched to 'stand-by') and command | |
437 | * rejects (old devices that can't do 'read partition'). | |
1da177e4 | 438 | */ |
1da177e4 LT |
439 | struct raw3270_ua { /* Query Reply structure for Usable Area */ |
440 | struct { /* Usable Area Query Reply Base */ | |
441 | short l; /* Length of this structured field */ | |
442 | char sfid; /* 0x81 if Query Reply */ | |
443 | char qcode; /* 0x81 if Usable Area */ | |
444 | char flags0; | |
445 | char flags1; | |
446 | short w; /* Width of usable area */ | |
447 | short h; /* Heigth of usavle area */ | |
448 | char units; /* 0x00:in; 0x01:mm */ | |
449 | int xr; | |
450 | int yr; | |
451 | char aw; | |
452 | char ah; | |
453 | short buffsz; /* Character buffer size, bytes */ | |
454 | char xmin; | |
455 | char ymin; | |
456 | char xmax; | |
457 | char ymax; | |
458 | } __attribute__ ((packed)) uab; | |
459 | struct { /* Alternate Usable Area Self-Defining Parameter */ | |
460 | char l; /* Length of this Self-Defining Parm */ | |
461 | char sdpid; /* 0x02 if Alternate Usable Area */ | |
462 | char res; | |
463 | char auaid; /* 0x01 is Id for the A U A */ | |
464 | short wauai; /* Width of AUAi */ | |
465 | short hauai; /* Height of AUAi */ | |
466 | char auaunits; /* 0x00:in, 0x01:mm */ | |
467 | int auaxr; | |
468 | int auayr; | |
469 | char awauai; | |
470 | char ahauai; | |
471 | } __attribute__ ((packed)) aua; | |
472 | } __attribute__ ((packed)); | |
473 | ||
1da177e4 | 474 | static void |
4d334fd1 | 475 | raw3270_size_device_vm(struct raw3270 *rp) |
1da177e4 LT |
476 | { |
477 | int rc, model; | |
9a92fe48 | 478 | struct ccw_dev_id dev_id; |
4d334fd1 | 479 | struct diag210 diag_data; |
1da177e4 | 480 | |
9a92fe48 | 481 | ccw_device_get_id(rp->cdev, &dev_id); |
4d334fd1 MS |
482 | diag_data.vrdcdvno = dev_id.devno; |
483 | diag_data.vrdclen = sizeof(struct diag210); | |
484 | rc = diag210(&diag_data); | |
485 | model = diag_data.vrdccrmd; | |
486 | /* Use default model 2 if the size could not be detected */ | |
487 | if (rc || model < 2 || model > 5) | |
488 | model = 2; | |
1da177e4 LT |
489 | switch (model) { |
490 | case 2: | |
491 | rp->model = model; | |
492 | rp->rows = 24; | |
493 | rp->cols = 80; | |
494 | break; | |
495 | case 3: | |
496 | rp->model = model; | |
497 | rp->rows = 32; | |
498 | rp->cols = 80; | |
499 | break; | |
500 | case 4: | |
501 | rp->model = model; | |
502 | rp->rows = 43; | |
503 | rp->cols = 80; | |
504 | break; | |
505 | case 5: | |
506 | rp->model = model; | |
507 | rp->rows = 27; | |
508 | rp->cols = 132; | |
509 | break; | |
1da177e4 | 510 | } |
1da177e4 LT |
511 | } |
512 | ||
4d334fd1 MS |
513 | static void |
514 | raw3270_size_device(struct raw3270 *rp) | |
1da177e4 | 515 | { |
1da177e4 | 516 | struct raw3270_ua *uap; |
1da177e4 | 517 | |
1da177e4 | 518 | /* Got a Query Reply */ |
132fab13 | 519 | uap = (struct raw3270_ua *) (rp->init_data + 1); |
1da177e4 | 520 | /* Paranoia check. */ |
4d334fd1 MS |
521 | if (rp->init_readmod.rc || rp->init_data[0] != 0x88 || |
522 | uap->uab.qcode != 0x81) { | |
523 | /* Couldn't detect size. Use default model 2. */ | |
524 | rp->model = 2; | |
525 | rp->rows = 24; | |
526 | rp->cols = 80; | |
527 | return; | |
528 | } | |
1da177e4 LT |
529 | /* Copy rows/columns of default Usable Area */ |
530 | rp->rows = uap->uab.h; | |
531 | rp->cols = uap->uab.w; | |
532 | /* Check for 14 bit addressing */ | |
533 | if ((uap->uab.flags0 & 0x0d) == 0x01) | |
534 | set_bit(RAW3270_FLAGS_14BITADDR, &rp->flags); | |
535 | /* Check for Alternate Usable Area */ | |
536 | if (uap->uab.l == sizeof(struct raw3270_ua) && | |
537 | uap->aua.sdpid == 0x02) { | |
538 | rp->rows = uap->aua.hauai; | |
539 | rp->cols = uap->aua.wauai; | |
540 | } | |
4d334fd1 MS |
541 | /* Try to find a model. */ |
542 | rp->model = 0; | |
543 | if (rp->rows == 24 && rp->cols == 80) | |
544 | rp->model = 2; | |
545 | if (rp->rows == 32 && rp->cols == 80) | |
546 | rp->model = 3; | |
547 | if (rp->rows == 43 && rp->cols == 80) | |
548 | rp->model = 4; | |
549 | if (rp->rows == 27 && rp->cols == 132) | |
550 | rp->model = 5; | |
1da177e4 LT |
551 | } |
552 | ||
4d334fd1 MS |
553 | static void |
554 | raw3270_size_device_done(struct raw3270 *rp) | |
1da177e4 | 555 | { |
4d334fd1 | 556 | struct raw3270_view *view; |
1da177e4 | 557 | |
d2c993d8 | 558 | rp->view = NULL; |
4d334fd1 MS |
559 | rp->state = RAW3270_STATE_READY; |
560 | /* Notify views about new size */ | |
561 | list_for_each_entry(view, &rp->view_list, list) | |
562 | if (view->fn->resize) | |
563 | view->fn->resize(view, rp->model, rp->rows, rp->cols); | |
564 | /* Setup processing done, now activate a view */ | |
565 | list_for_each_entry(view, &rp->view_list, list) { | |
566 | rp->view = view; | |
567 | if (view->fn->activate(view) == 0) | |
568 | break; | |
569 | rp->view = NULL; | |
1da177e4 | 570 | } |
4d334fd1 MS |
571 | } |
572 | ||
573 | static void | |
574 | raw3270_read_modified_cb(struct raw3270_request *rq, void *data) | |
575 | { | |
576 | struct raw3270 *rp = rq->view->dev; | |
577 | ||
578 | raw3270_size_device(rp); | |
579 | raw3270_size_device_done(rp); | |
580 | } | |
581 | ||
582 | static void | |
583 | raw3270_read_modified(struct raw3270 *rp) | |
584 | { | |
585 | if (rp->state != RAW3270_STATE_W4ATTN) | |
586 | return; | |
587 | /* Use 'read modified' to get the result of a read partition. */ | |
588 | memset(&rp->init_readmod, 0, sizeof(rp->init_readmod)); | |
589 | memset(&rp->init_data, 0, sizeof(rp->init_data)); | |
590 | rp->init_readmod.ccw.cmd_code = TC_READMOD; | |
591 | rp->init_readmod.ccw.flags = CCW_FLAG_SLI; | |
592 | rp->init_readmod.ccw.count = sizeof(rp->init_data); | |
593 | rp->init_readmod.ccw.cda = (__u32) __pa(rp->init_data); | |
594 | rp->init_readmod.callback = raw3270_read_modified_cb; | |
595 | rp->state = RAW3270_STATE_READMOD; | |
596 | raw3270_start_irq(&rp->init_view, &rp->init_readmod); | |
597 | } | |
598 | ||
599 | static void | |
600 | raw3270_writesf_readpart(struct raw3270 *rp) | |
601 | { | |
602 | static const unsigned char wbuf[] = | |
603 | { 0x00, 0x07, 0x01, 0xff, 0x03, 0x00, 0x81 }; | |
604 | ||
605 | /* Store 'read partition' data stream to init_data */ | |
606 | memset(&rp->init_readpart, 0, sizeof(rp->init_readpart)); | |
607 | memset(&rp->init_data, 0, sizeof(rp->init_data)); | |
608 | memcpy(&rp->init_data, wbuf, sizeof(wbuf)); | |
609 | rp->init_readpart.ccw.cmd_code = TC_WRITESF; | |
610 | rp->init_readpart.ccw.flags = CCW_FLAG_SLI; | |
611 | rp->init_readpart.ccw.count = sizeof(wbuf); | |
612 | rp->init_readpart.ccw.cda = (__u32) __pa(&rp->init_data); | |
613 | rp->state = RAW3270_STATE_W4ATTN; | |
614 | raw3270_start_irq(&rp->init_view, &rp->init_readpart); | |
615 | } | |
616 | ||
617 | /* | |
618 | * Device reset | |
619 | */ | |
620 | static void | |
621 | raw3270_reset_device_cb(struct raw3270_request *rq, void *data) | |
622 | { | |
623 | struct raw3270 *rp = rq->view->dev; | |
624 | ||
625 | if (rp->state != RAW3270_STATE_RESET) | |
626 | return; | |
dc3ac5ff | 627 | if (rq->rc) { |
4d334fd1 MS |
628 | /* Reset command failed. */ |
629 | rp->state = RAW3270_STATE_INIT; | |
01a7cfa2 | 630 | } else if (MACHINE_IS_VM) { |
4d334fd1 MS |
631 | raw3270_size_device_vm(rp); |
632 | raw3270_size_device_done(rp); | |
633 | } else | |
634 | raw3270_writesf_readpart(rp); | |
bd1cb5de | 635 | memset(&rp->init_reset, 0, sizeof(rp->init_reset)); |
1da177e4 LT |
636 | } |
637 | ||
638 | static int | |
4d334fd1 | 639 | __raw3270_reset_device(struct raw3270 *rp) |
1da177e4 LT |
640 | { |
641 | int rc; | |
642 | ||
bd1cb5de MS |
643 | /* Check if reset is already pending */ |
644 | if (rp->init_reset.view) | |
645 | return -EBUSY; | |
4d334fd1 | 646 | /* Store reset data stream to init_data/init_reset */ |
132fab13 | 647 | rp->init_data[0] = TW_KR; |
4d334fd1 MS |
648 | rp->init_reset.ccw.cmd_code = TC_EWRITEA; |
649 | rp->init_reset.ccw.flags = CCW_FLAG_SLI; | |
650 | rp->init_reset.ccw.count = 1; | |
651 | rp->init_reset.ccw.cda = (__u32) __pa(rp->init_data); | |
652 | rp->init_reset.callback = raw3270_reset_device_cb; | |
653 | rc = __raw3270_start(rp, &rp->init_view, &rp->init_reset); | |
654 | if (rc == 0 && rp->state == RAW3270_STATE_INIT) | |
655 | rp->state = RAW3270_STATE_RESET; | |
656 | return rc; | |
657 | } | |
658 | ||
659 | static int | |
660 | raw3270_reset_device(struct raw3270 *rp) | |
661 | { | |
662 | unsigned long flags; | |
663 | int rc; | |
664 | ||
665 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
666 | rc = __raw3270_reset_device(rp); | |
667 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1da177e4 LT |
668 | return rc; |
669 | } | |
670 | ||
ed3cb6f0 RH |
671 | int |
672 | raw3270_reset(struct raw3270_view *view) | |
673 | { | |
674 | struct raw3270 *rp; | |
675 | int rc; | |
676 | ||
677 | rp = view->dev; | |
4b214a0c MS |
678 | if (!rp || rp->view != view || |
679 | test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
ed3cb6f0 | 680 | rc = -EACCES; |
4d334fd1 MS |
681 | else if (!raw3270_state_ready(rp)) |
682 | rc = -EBUSY; | |
ed3cb6f0 RH |
683 | else |
684 | rc = raw3270_reset_device(view->dev); | |
685 | return rc; | |
686 | } | |
687 | ||
4d334fd1 MS |
688 | static int |
689 | raw3270_init_irq(struct raw3270_view *view, struct raw3270_request *rq, | |
690 | struct irb *irb) | |
691 | { | |
692 | struct raw3270 *rp; | |
693 | ||
694 | /* | |
695 | * Unit-Check Processing: | |
696 | * Expect Command Reject or Intervention Required. | |
697 | */ | |
698 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { | |
699 | /* Request finished abnormally. */ | |
700 | if (irb->ecw[0] & SNS0_INTERVENTION_REQ) { | |
701 | set_bit(RAW3270_FLAGS_BUSY, &view->dev->flags); | |
702 | return RAW3270_IO_BUSY; | |
703 | } | |
704 | } | |
705 | if (rq) { | |
706 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { | |
707 | if (irb->ecw[0] & SNS0_CMD_REJECT) | |
708 | rq->rc = -EOPNOTSUPP; | |
709 | else | |
710 | rq->rc = -EIO; | |
711 | } | |
712 | } | |
713 | if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { | |
714 | /* Queue read modified after attention interrupt */ | |
715 | rp = view->dev; | |
716 | raw3270_read_modified(rp); | |
717 | } | |
718 | return RAW3270_IO_DONE; | |
719 | } | |
720 | ||
721 | static struct raw3270_fn raw3270_init_fn = { | |
722 | .intv = raw3270_init_irq | |
723 | }; | |
724 | ||
1da177e4 LT |
725 | /* |
726 | * Setup new 3270 device. | |
727 | */ | |
728 | static int | |
729 | raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc) | |
730 | { | |
731 | struct list_head *l; | |
732 | struct raw3270 *tmp; | |
733 | int minor; | |
734 | ||
735 | memset(rp, 0, sizeof(struct raw3270)); | |
736 | /* Copy ebcdic -> ascii translation table. */ | |
737 | memcpy(ascebc, _ascebc, 256); | |
738 | if (tubxcorrect) { | |
739 | /* correct brackets and circumflex */ | |
740 | ascebc['['] = 0xad; | |
741 | ascebc[']'] = 0xbd; | |
742 | ascebc['^'] = 0xb0; | |
743 | } | |
744 | rp->ascebc = ascebc; | |
745 | ||
746 | /* Set defaults. */ | |
747 | rp->rows = 24; | |
748 | rp->cols = 80; | |
749 | ||
750 | INIT_LIST_HEAD(&rp->req_queue); | |
751 | INIT_LIST_HEAD(&rp->view_list); | |
752 | ||
4d334fd1 MS |
753 | rp->init_view.dev = rp; |
754 | rp->init_view.fn = &raw3270_init_fn; | |
755 | rp->view = &rp->init_view; | |
756 | ||
1da177e4 LT |
757 | /* |
758 | * Add device to list and find the smallest unused minor | |
ed3cb6f0 RH |
759 | * number for it. Note: there is no device with minor 0, |
760 | * see special case for fs3270.c:fs3270_open(). | |
1da177e4 | 761 | */ |
14cc3e2b | 762 | mutex_lock(&raw3270_mutex); |
1da177e4 | 763 | /* Keep the list sorted. */ |
ed3cb6f0 | 764 | minor = RAW3270_FIRSTMINOR; |
1da177e4 LT |
765 | rp->minor = -1; |
766 | list_for_each(l, &raw3270_devices) { | |
767 | tmp = list_entry(l, struct raw3270, list); | |
768 | if (tmp->minor > minor) { | |
769 | rp->minor = minor; | |
770 | __list_add(&rp->list, l->prev, l); | |
771 | break; | |
772 | } | |
773 | minor++; | |
774 | } | |
ed3cb6f0 | 775 | if (rp->minor == -1 && minor < RAW3270_MAXDEVS + RAW3270_FIRSTMINOR) { |
1da177e4 LT |
776 | rp->minor = minor; |
777 | list_add_tail(&rp->list, &raw3270_devices); | |
778 | } | |
14cc3e2b | 779 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
780 | /* No free minor number? Then give up. */ |
781 | if (rp->minor == -1) | |
782 | return -EUSERS; | |
783 | rp->cdev = cdev; | |
dff59b64 | 784 | dev_set_drvdata(&cdev->dev, rp); |
1da177e4 LT |
785 | cdev->handler = raw3270_irq; |
786 | return 0; | |
787 | } | |
788 | ||
789 | #ifdef CONFIG_TN3270_CONSOLE | |
2253e8d7 SO |
790 | /* Tentative definition - see below for actual definition. */ |
791 | static struct ccw_driver raw3270_ccw_driver; | |
792 | ||
1da177e4 LT |
793 | /* |
794 | * Setup 3270 device configured as console. | |
795 | */ | |
2253e8d7 | 796 | struct raw3270 __init *raw3270_setup_console(void) |
1da177e4 | 797 | { |
2253e8d7 | 798 | struct ccw_device *cdev; |
4d334fd1 | 799 | unsigned long flags; |
1da177e4 LT |
800 | struct raw3270 *rp; |
801 | char *ascebc; | |
802 | int rc; | |
803 | ||
1e532096 | 804 | cdev = ccw_device_create_console(&raw3270_ccw_driver); |
2253e8d7 SO |
805 | if (IS_ERR(cdev)) |
806 | return ERR_CAST(cdev); | |
807 | ||
33403dcf HC |
808 | rp = kzalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); |
809 | ascebc = kzalloc(256, GFP_KERNEL); | |
1da177e4 LT |
810 | rc = raw3270_setup_device(cdev, rp, ascebc); |
811 | if (rc) | |
812 | return ERR_PTR(rc); | |
813 | set_bit(RAW3270_FLAGS_CONSOLE, &rp->flags); | |
1e532096 SO |
814 | |
815 | rc = ccw_device_enable_console(cdev); | |
816 | if (rc) { | |
817 | ccw_device_destroy_console(cdev); | |
818 | return ERR_PTR(rc); | |
819 | } | |
820 | ||
4d334fd1 MS |
821 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); |
822 | do { | |
823 | __raw3270_reset_device(rp); | |
824 | while (!raw3270_state_final(rp)) { | |
188561a4 | 825 | ccw_device_wait_idle(rp->cdev); |
4d334fd1 MS |
826 | barrier(); |
827 | } | |
828 | } while (rp->state != RAW3270_STATE_READY); | |
829 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1da177e4 LT |
830 | return rp; |
831 | } | |
832 | ||
833 | void | |
834 | raw3270_wait_cons_dev(struct raw3270 *rp) | |
835 | { | |
836 | unsigned long flags; | |
837 | ||
838 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
188561a4 | 839 | ccw_device_wait_idle(rp->cdev); |
1da177e4 LT |
840 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); |
841 | } | |
842 | ||
843 | #endif | |
844 | ||
845 | /* | |
846 | * Create a 3270 device structure. | |
847 | */ | |
848 | static struct raw3270 * | |
849 | raw3270_create_device(struct ccw_device *cdev) | |
850 | { | |
851 | struct raw3270 *rp; | |
852 | char *ascebc; | |
853 | int rc; | |
854 | ||
bd1cb5de | 855 | rp = kzalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
856 | if (!rp) |
857 | return ERR_PTR(-ENOMEM); | |
858 | ascebc = kmalloc(256, GFP_KERNEL); | |
859 | if (!ascebc) { | |
860 | kfree(rp); | |
861 | return ERR_PTR(-ENOMEM); | |
862 | } | |
863 | rc = raw3270_setup_device(cdev, rp, ascebc); | |
864 | if (rc) { | |
865 | kfree(rp->ascebc); | |
866 | kfree(rp); | |
867 | rp = ERR_PTR(rc); | |
868 | } | |
869 | /* Get reference to ccw_device structure. */ | |
870 | get_device(&cdev->dev); | |
871 | return rp; | |
872 | } | |
873 | ||
874 | /* | |
875 | * Activate a view. | |
876 | */ | |
877 | int | |
878 | raw3270_activate_view(struct raw3270_view *view) | |
879 | { | |
880 | struct raw3270 *rp; | |
881 | struct raw3270_view *oldview, *nv; | |
882 | unsigned long flags; | |
883 | int rc; | |
884 | ||
885 | rp = view->dev; | |
886 | if (!rp) | |
887 | return -ENODEV; | |
888 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
889 | if (rp->view == view) | |
890 | rc = 0; | |
4d334fd1 MS |
891 | else if (!raw3270_state_ready(rp)) |
892 | rc = -EBUSY; | |
4b214a0c MS |
893 | else if (test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) |
894 | rc = -EACCES; | |
1da177e4 | 895 | else { |
d2c993d8 | 896 | oldview = NULL; |
4d334fd1 | 897 | if (rp->view && rp->view->fn->deactivate) { |
1da177e4 LT |
898 | oldview = rp->view; |
899 | oldview->fn->deactivate(oldview); | |
900 | } | |
901 | rp->view = view; | |
902 | rc = view->fn->activate(view); | |
903 | if (rc) { | |
904 | /* Didn't work. Try to reactivate the old view. */ | |
905 | rp->view = oldview; | |
906 | if (!oldview || oldview->fn->activate(oldview) != 0) { | |
907 | /* Didn't work as well. Try any other view. */ | |
908 | list_for_each_entry(nv, &rp->view_list, list) | |
909 | if (nv != view && nv != oldview) { | |
910 | rp->view = nv; | |
911 | if (nv->fn->activate(nv) == 0) | |
912 | break; | |
d2c993d8 | 913 | rp->view = NULL; |
1da177e4 LT |
914 | } |
915 | } | |
916 | } | |
917 | } | |
918 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
919 | return rc; | |
920 | } | |
921 | ||
922 | /* | |
923 | * Deactivate current view. | |
924 | */ | |
925 | void | |
926 | raw3270_deactivate_view(struct raw3270_view *view) | |
927 | { | |
928 | unsigned long flags; | |
929 | struct raw3270 *rp; | |
930 | ||
931 | rp = view->dev; | |
932 | if (!rp) | |
933 | return; | |
934 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
935 | if (rp->view == view) { | |
936 | view->fn->deactivate(view); | |
d2c993d8 | 937 | rp->view = NULL; |
1da177e4 LT |
938 | /* Move deactivated view to end of list. */ |
939 | list_del_init(&view->list); | |
940 | list_add_tail(&view->list, &rp->view_list); | |
941 | /* Try to activate another view. */ | |
4d334fd1 | 942 | if (raw3270_state_ready(rp) && |
4b214a0c | 943 | !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) { |
ed3cb6f0 RH |
944 | list_for_each_entry(view, &rp->view_list, list) { |
945 | rp->view = view; | |
946 | if (view->fn->activate(view) == 0) | |
1da177e4 | 947 | break; |
d2c993d8 | 948 | rp->view = NULL; |
ed3cb6f0 | 949 | } |
1da177e4 LT |
950 | } |
951 | } | |
952 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
953 | } | |
954 | ||
955 | /* | |
956 | * Add view to device with minor "minor". | |
957 | */ | |
958 | int | |
959 | raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn, int minor) | |
960 | { | |
961 | unsigned long flags; | |
962 | struct raw3270 *rp; | |
963 | int rc; | |
964 | ||
ed3cb6f0 RH |
965 | if (minor <= 0) |
966 | return -ENODEV; | |
14cc3e2b | 967 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
968 | rc = -ENODEV; |
969 | list_for_each_entry(rp, &raw3270_devices, list) { | |
970 | if (rp->minor != minor) | |
971 | continue; | |
972 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
4d334fd1 MS |
973 | atomic_set(&view->ref_count, 2); |
974 | view->dev = rp; | |
975 | view->fn = fn; | |
976 | view->model = rp->model; | |
977 | view->rows = rp->rows; | |
978 | view->cols = rp->cols; | |
979 | view->ascebc = rp->ascebc; | |
980 | spin_lock_init(&view->lock); | |
981 | list_add(&view->list, &rp->view_list); | |
982 | rc = 0; | |
1da177e4 LT |
983 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); |
984 | break; | |
985 | } | |
14cc3e2b | 986 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
987 | return rc; |
988 | } | |
989 | ||
990 | /* | |
991 | * Find specific view of device with minor "minor". | |
992 | */ | |
993 | struct raw3270_view * | |
994 | raw3270_find_view(struct raw3270_fn *fn, int minor) | |
995 | { | |
996 | struct raw3270 *rp; | |
997 | struct raw3270_view *view, *tmp; | |
998 | unsigned long flags; | |
999 | ||
14cc3e2b | 1000 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
1001 | view = ERR_PTR(-ENODEV); |
1002 | list_for_each_entry(rp, &raw3270_devices, list) { | |
1003 | if (rp->minor != minor) | |
1004 | continue; | |
1005 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
4d334fd1 MS |
1006 | list_for_each_entry(tmp, &rp->view_list, list) { |
1007 | if (tmp->fn == fn) { | |
1008 | raw3270_get_view(tmp); | |
1009 | view = tmp; | |
1010 | break; | |
1da177e4 LT |
1011 | } |
1012 | } | |
1013 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1014 | break; | |
1015 | } | |
14cc3e2b | 1016 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1017 | return view; |
1018 | } | |
1019 | ||
1020 | /* | |
1021 | * Remove view from device and free view structure via call to view->fn->free. | |
1022 | */ | |
1023 | void | |
1024 | raw3270_del_view(struct raw3270_view *view) | |
1025 | { | |
1026 | unsigned long flags; | |
1027 | struct raw3270 *rp; | |
1028 | struct raw3270_view *nv; | |
1029 | ||
1030 | rp = view->dev; | |
1031 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1032 | if (rp->view == view) { | |
1033 | view->fn->deactivate(view); | |
d2c993d8 | 1034 | rp->view = NULL; |
1da177e4 LT |
1035 | } |
1036 | list_del_init(&view->list); | |
4d334fd1 | 1037 | if (!rp->view && raw3270_state_ready(rp) && |
4b214a0c | 1038 | !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) { |
1da177e4 LT |
1039 | /* Try to activate another view. */ |
1040 | list_for_each_entry(nv, &rp->view_list, list) { | |
ed3cb6f0 | 1041 | if (nv->fn->activate(nv) == 0) { |
1da177e4 LT |
1042 | rp->view = nv; |
1043 | break; | |
1044 | } | |
1045 | } | |
1046 | } | |
1047 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1048 | /* Wait for reference counter to drop to zero. */ | |
1049 | atomic_dec(&view->ref_count); | |
1050 | wait_event(raw3270_wait_queue, atomic_read(&view->ref_count) == 0); | |
1051 | if (view->fn->free) | |
1052 | view->fn->free(view); | |
1053 | } | |
1054 | ||
1055 | /* | |
1056 | * Remove a 3270 device structure. | |
1057 | */ | |
1058 | static void | |
1059 | raw3270_delete_device(struct raw3270 *rp) | |
1060 | { | |
1061 | struct ccw_device *cdev; | |
1062 | ||
1063 | /* Remove from device chain. */ | |
14cc3e2b | 1064 | mutex_lock(&raw3270_mutex); |
1da177e4 | 1065 | list_del_init(&rp->list); |
14cc3e2b | 1066 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1067 | |
1068 | /* Disconnect from ccw_device. */ | |
1069 | cdev = rp->cdev; | |
d2c993d8 | 1070 | rp->cdev = NULL; |
dff59b64 | 1071 | dev_set_drvdata(&cdev->dev, NULL); |
d2c993d8 | 1072 | cdev->handler = NULL; |
1da177e4 LT |
1073 | |
1074 | /* Put ccw_device structure. */ | |
1075 | put_device(&cdev->dev); | |
1076 | ||
1077 | /* Now free raw3270 structure. */ | |
1078 | kfree(rp->ascebc); | |
1079 | kfree(rp); | |
1080 | } | |
1081 | ||
1082 | static int | |
1083 | raw3270_probe (struct ccw_device *cdev) | |
1084 | { | |
1085 | return 0; | |
1086 | } | |
1087 | ||
1088 | /* | |
1089 | * Additional attributes for a 3270 device | |
1090 | */ | |
1091 | static ssize_t | |
3fd3c0a5 | 1092 | raw3270_model_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1093 | { |
1094 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
dff59b64 | 1095 | ((struct raw3270 *) dev_get_drvdata(dev))->model); |
1da177e4 | 1096 | } |
d2c993d8 | 1097 | static DEVICE_ATTR(model, 0444, raw3270_model_show, NULL); |
1da177e4 LT |
1098 | |
1099 | static ssize_t | |
3fd3c0a5 | 1100 | raw3270_rows_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1101 | { |
1102 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
dff59b64 | 1103 | ((struct raw3270 *) dev_get_drvdata(dev))->rows); |
1da177e4 | 1104 | } |
d2c993d8 | 1105 | static DEVICE_ATTR(rows, 0444, raw3270_rows_show, NULL); |
1da177e4 LT |
1106 | |
1107 | static ssize_t | |
3fd3c0a5 | 1108 | raw3270_columns_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1109 | { |
1110 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
dff59b64 | 1111 | ((struct raw3270 *) dev_get_drvdata(dev))->cols); |
1da177e4 | 1112 | } |
d2c993d8 | 1113 | static DEVICE_ATTR(columns, 0444, raw3270_columns_show, NULL); |
1da177e4 LT |
1114 | |
1115 | static struct attribute * raw3270_attrs[] = { | |
1116 | &dev_attr_model.attr, | |
1117 | &dev_attr_rows.attr, | |
1118 | &dev_attr_columns.attr, | |
1119 | NULL, | |
1120 | }; | |
1121 | ||
1122 | static struct attribute_group raw3270_attr_group = { | |
1123 | .attrs = raw3270_attrs, | |
1124 | }; | |
1125 | ||
d7cf0d57 | 1126 | static int raw3270_create_attributes(struct raw3270 *rp) |
1da177e4 | 1127 | { |
c95571e6 | 1128 | return sysfs_create_group(&rp->cdev->dev.kobj, &raw3270_attr_group); |
1da177e4 LT |
1129 | } |
1130 | ||
1131 | /* | |
1132 | * Notifier for device addition/removal | |
1133 | */ | |
c11ca97e | 1134 | static LIST_HEAD(raw3270_notifier); |
1da177e4 | 1135 | |
c95571e6 | 1136 | int raw3270_register_notifier(struct raw3270_notifier *notifier) |
1da177e4 | 1137 | { |
1da177e4 LT |
1138 | struct raw3270 *rp; |
1139 | ||
14cc3e2b | 1140 | mutex_lock(&raw3270_mutex); |
c95571e6 MS |
1141 | list_add_tail(¬ifier->list, &raw3270_notifier); |
1142 | list_for_each_entry(rp, &raw3270_devices, list) | |
1143 | notifier->create(rp->minor); | |
14cc3e2b | 1144 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1145 | return 0; |
1146 | } | |
1147 | ||
c95571e6 | 1148 | void raw3270_unregister_notifier(struct raw3270_notifier *notifier) |
1da177e4 | 1149 | { |
c95571e6 | 1150 | struct raw3270 *rp; |
1da177e4 | 1151 | |
14cc3e2b | 1152 | mutex_lock(&raw3270_mutex); |
c95571e6 MS |
1153 | list_for_each_entry(rp, &raw3270_devices, list) |
1154 | notifier->destroy(rp->minor); | |
1155 | list_del(¬ifier->list); | |
14cc3e2b | 1156 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1157 | } |
1158 | ||
1159 | /* | |
1160 | * Set 3270 device online. | |
1161 | */ | |
1162 | static int | |
1163 | raw3270_set_online (struct ccw_device *cdev) | |
1164 | { | |
1da177e4 | 1165 | struct raw3270_notifier *np; |
c95571e6 | 1166 | struct raw3270 *rp; |
1da177e4 LT |
1167 | int rc; |
1168 | ||
1169 | rp = raw3270_create_device(cdev); | |
1170 | if (IS_ERR(rp)) | |
1171 | return PTR_ERR(rp); | |
d7cf0d57 HC |
1172 | rc = raw3270_create_attributes(rp); |
1173 | if (rc) | |
1174 | goto failure; | |
4d334fd1 | 1175 | raw3270_reset_device(rp); |
14cc3e2b | 1176 | mutex_lock(&raw3270_mutex); |
1da177e4 | 1177 | list_for_each_entry(np, &raw3270_notifier, list) |
c95571e6 | 1178 | np->create(rp->minor); |
14cc3e2b | 1179 | mutex_unlock(&raw3270_mutex); |
1da177e4 | 1180 | return 0; |
ed3cb6f0 RH |
1181 | |
1182 | failure: | |
1183 | raw3270_delete_device(rp); | |
1184 | return rc; | |
1da177e4 LT |
1185 | } |
1186 | ||
1187 | /* | |
1188 | * Remove 3270 device structure. | |
1189 | */ | |
1190 | static void | |
1191 | raw3270_remove (struct ccw_device *cdev) | |
1192 | { | |
1193 | unsigned long flags; | |
1194 | struct raw3270 *rp; | |
1195 | struct raw3270_view *v; | |
1196 | struct raw3270_notifier *np; | |
1197 | ||
dff59b64 | 1198 | rp = dev_get_drvdata(&cdev->dev); |
ed3cb6f0 RH |
1199 | /* |
1200 | * _remove is the opposite of _probe; it's probe that | |
1201 | * should set up rp. raw3270_remove gets entered for | |
1202 | * devices even if they haven't been varied online. | |
1203 | * Thus, rp may validly be NULL here. | |
1204 | */ | |
1205 | if (rp == NULL) | |
1206 | return; | |
1da177e4 LT |
1207 | |
1208 | sysfs_remove_group(&cdev->dev.kobj, &raw3270_attr_group); | |
1209 | ||
1210 | /* Deactivate current view and remove all views. */ | |
1211 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); | |
1212 | if (rp->view) { | |
4d334fd1 MS |
1213 | if (rp->view->fn->deactivate) |
1214 | rp->view->fn->deactivate(rp->view); | |
d2c993d8 | 1215 | rp->view = NULL; |
1da177e4 LT |
1216 | } |
1217 | while (!list_empty(&rp->view_list)) { | |
1218 | v = list_entry(rp->view_list.next, struct raw3270_view, list); | |
1219 | if (v->fn->release) | |
1220 | v->fn->release(v); | |
1221 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1222 | raw3270_del_view(v); | |
1223 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); | |
1224 | } | |
1225 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1226 | ||
14cc3e2b | 1227 | mutex_lock(&raw3270_mutex); |
1da177e4 | 1228 | list_for_each_entry(np, &raw3270_notifier, list) |
c95571e6 | 1229 | np->destroy(rp->minor); |
14cc3e2b | 1230 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1231 | |
1232 | /* Reset 3270 device. */ | |
1233 | raw3270_reset_device(rp); | |
1234 | /* And finally remove it. */ | |
1235 | raw3270_delete_device(rp); | |
1236 | } | |
1237 | ||
1238 | /* | |
1239 | * Set 3270 device offline. | |
1240 | */ | |
1241 | static int | |
1242 | raw3270_set_offline (struct ccw_device *cdev) | |
1243 | { | |
1244 | struct raw3270 *rp; | |
1245 | ||
dff59b64 | 1246 | rp = dev_get_drvdata(&cdev->dev); |
1da177e4 LT |
1247 | if (test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) |
1248 | return -EBUSY; | |
1249 | raw3270_remove(cdev); | |
1250 | return 0; | |
1251 | } | |
1252 | ||
4b214a0c MS |
1253 | static int raw3270_pm_stop(struct ccw_device *cdev) |
1254 | { | |
1255 | struct raw3270 *rp; | |
1256 | struct raw3270_view *view; | |
1257 | unsigned long flags; | |
1258 | ||
4f0076f7 | 1259 | rp = dev_get_drvdata(&cdev->dev); |
4b214a0c MS |
1260 | if (!rp) |
1261 | return 0; | |
1262 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
4d334fd1 | 1263 | if (rp->view && rp->view->fn->deactivate) |
4b214a0c MS |
1264 | rp->view->fn->deactivate(rp->view); |
1265 | if (!test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) { | |
1266 | /* | |
1267 | * Release tty and fullscreen for all non-console | |
1268 | * devices. | |
1269 | */ | |
1270 | list_for_each_entry(view, &rp->view_list, list) { | |
1271 | if (view->fn->release) | |
1272 | view->fn->release(view); | |
1273 | } | |
1274 | } | |
1275 | set_bit(RAW3270_FLAGS_FROZEN, &rp->flags); | |
1276 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1277 | return 0; | |
1278 | } | |
1279 | ||
1280 | static int raw3270_pm_start(struct ccw_device *cdev) | |
1281 | { | |
1282 | struct raw3270 *rp; | |
1283 | unsigned long flags; | |
1284 | ||
4f0076f7 | 1285 | rp = dev_get_drvdata(&cdev->dev); |
4b214a0c MS |
1286 | if (!rp) |
1287 | return 0; | |
1288 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1289 | clear_bit(RAW3270_FLAGS_FROZEN, &rp->flags); | |
4d334fd1 | 1290 | if (rp->view && rp->view->fn->activate) |
4b214a0c MS |
1291 | rp->view->fn->activate(rp->view); |
1292 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1293 | return 0; | |
1294 | } | |
1295 | ||
1296 | void raw3270_pm_unfreeze(struct raw3270_view *view) | |
1297 | { | |
34483cac | 1298 | #ifdef CONFIG_TN3270_CONSOLE |
4b214a0c MS |
1299 | struct raw3270 *rp; |
1300 | ||
1301 | rp = view->dev; | |
1302 | if (rp && test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
f10ccca7 | 1303 | ccw_device_force_console(rp->cdev); |
34483cac | 1304 | #endif |
4b214a0c MS |
1305 | } |
1306 | ||
1da177e4 LT |
1307 | static struct ccw_device_id raw3270_id[] = { |
1308 | { CCW_DEVICE(0x3270, 0) }, | |
1309 | { CCW_DEVICE(0x3271, 0) }, | |
1310 | { CCW_DEVICE(0x3272, 0) }, | |
1311 | { CCW_DEVICE(0x3273, 0) }, | |
1312 | { CCW_DEVICE(0x3274, 0) }, | |
1313 | { CCW_DEVICE(0x3275, 0) }, | |
1314 | { CCW_DEVICE(0x3276, 0) }, | |
1315 | { CCW_DEVICE(0x3277, 0) }, | |
1316 | { CCW_DEVICE(0x3278, 0) }, | |
1317 | { CCW_DEVICE(0x3279, 0) }, | |
1318 | { CCW_DEVICE(0x3174, 0) }, | |
1319 | { /* end of list */ }, | |
1320 | }; | |
1321 | ||
1322 | static struct ccw_driver raw3270_ccw_driver = { | |
3bda058b SO |
1323 | .driver = { |
1324 | .name = "3270", | |
1325 | .owner = THIS_MODULE, | |
1326 | }, | |
1da177e4 LT |
1327 | .ids = raw3270_id, |
1328 | .probe = &raw3270_probe, | |
1329 | .remove = &raw3270_remove, | |
1330 | .set_online = &raw3270_set_online, | |
1331 | .set_offline = &raw3270_set_offline, | |
4b214a0c MS |
1332 | .freeze = &raw3270_pm_stop, |
1333 | .thaw = &raw3270_pm_start, | |
1334 | .restore = &raw3270_pm_start, | |
420f42ec | 1335 | .int_class = IRQIO_C70, |
1da177e4 LT |
1336 | }; |
1337 | ||
1338 | static int | |
1339 | raw3270_init(void) | |
1340 | { | |
1341 | struct raw3270 *rp; | |
1342 | int rc; | |
1343 | ||
1344 | if (raw3270_registered) | |
1345 | return 0; | |
1346 | raw3270_registered = 1; | |
1347 | rc = ccw_driver_register(&raw3270_ccw_driver); | |
1348 | if (rc == 0) { | |
1349 | /* Create attributes for early (= console) device. */ | |
14cc3e2b | 1350 | mutex_lock(&raw3270_mutex); |
ed3cb6f0 | 1351 | class3270 = class_create(THIS_MODULE, "3270"); |
1da177e4 LT |
1352 | list_for_each_entry(rp, &raw3270_devices, list) { |
1353 | get_device(&rp->cdev->dev); | |
1354 | raw3270_create_attributes(rp); | |
1355 | } | |
14cc3e2b | 1356 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1357 | } |
1358 | return rc; | |
1359 | } | |
1360 | ||
1361 | static void | |
1362 | raw3270_exit(void) | |
1363 | { | |
1364 | ccw_driver_unregister(&raw3270_ccw_driver); | |
ed3cb6f0 | 1365 | class_destroy(class3270); |
1da177e4 LT |
1366 | } |
1367 | ||
1368 | MODULE_LICENSE("GPL"); | |
1369 | ||
1370 | module_init(raw3270_init); | |
1371 | module_exit(raw3270_exit); | |
1372 | ||
c95571e6 | 1373 | EXPORT_SYMBOL(class3270); |
1da177e4 LT |
1374 | EXPORT_SYMBOL(raw3270_request_alloc); |
1375 | EXPORT_SYMBOL(raw3270_request_free); | |
1376 | EXPORT_SYMBOL(raw3270_request_reset); | |
1377 | EXPORT_SYMBOL(raw3270_request_set_cmd); | |
1378 | EXPORT_SYMBOL(raw3270_request_add_data); | |
1379 | EXPORT_SYMBOL(raw3270_request_set_data); | |
1380 | EXPORT_SYMBOL(raw3270_request_set_idal); | |
1381 | EXPORT_SYMBOL(raw3270_buffer_address); | |
1382 | EXPORT_SYMBOL(raw3270_add_view); | |
1383 | EXPORT_SYMBOL(raw3270_del_view); | |
1384 | EXPORT_SYMBOL(raw3270_find_view); | |
1385 | EXPORT_SYMBOL(raw3270_activate_view); | |
1386 | EXPORT_SYMBOL(raw3270_deactivate_view); | |
1387 | EXPORT_SYMBOL(raw3270_start); | |
ed3cb6f0 | 1388 | EXPORT_SYMBOL(raw3270_start_locked); |
1da177e4 | 1389 | EXPORT_SYMBOL(raw3270_start_irq); |
ed3cb6f0 | 1390 | EXPORT_SYMBOL(raw3270_reset); |
1da177e4 LT |
1391 | EXPORT_SYMBOL(raw3270_register_notifier); |
1392 | EXPORT_SYMBOL(raw3270_unregister_notifier); | |
1393 | EXPORT_SYMBOL(raw3270_wait_queue); |