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