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6f05e69e | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
4b214a0c | 3 | * IBM/3270 Driver - core functions. |
1da177e4 | 4 | * |
4b214a0c MS |
5 | * Author(s): |
6 | * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global) | |
7 | * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com> | |
8 | * Copyright IBM Corp. 2003, 2009 | |
1da177e4 LT |
9 | */ |
10 | ||
1da177e4 LT |
11 | #include <linux/module.h> |
12 | #include <linux/err.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/list.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/types.h> | |
18 | #include <linux/wait.h> | |
19 | ||
20 | #include <asm/ccwdev.h> | |
21 | #include <asm/cio.h> | |
22 | #include <asm/ebcdic.h> | |
0a87c5cf | 23 | #include <asm/diag.h> |
1da177e4 LT |
24 | |
25 | #include "raw3270.h" | |
26 | ||
ed3cb6f0 RH |
27 | #include <linux/major.h> |
28 | #include <linux/kdev_t.h> | |
29 | #include <linux/device.h> | |
14cc3e2b | 30 | #include <linux/mutex.h> |
ed3cb6f0 | 31 | |
c95571e6 | 32 | struct class *class3270; |
ed3cb6f0 | 33 | |
1da177e4 LT |
34 | /* The main 3270 data structure. */ |
35 | struct raw3270 { | |
36 | struct list_head list; | |
37 | struct ccw_device *cdev; | |
38 | int minor; | |
39 | ||
40 | short model, rows, cols; | |
4d334fd1 | 41 | unsigned int state; |
1da177e4 LT |
42 | unsigned long flags; |
43 | ||
44 | struct list_head req_queue; /* Request queue. */ | |
45 | struct list_head view_list; /* List of available views. */ | |
46 | struct raw3270_view *view; /* Active view. */ | |
47 | ||
48 | struct timer_list timer; /* Device timer. */ | |
49 | ||
50 | unsigned char *ascebc; /* ascii -> ebcdic table */ | |
132fab13 | 51 | |
4d334fd1 MS |
52 | struct raw3270_view init_view; |
53 | struct raw3270_request init_reset; | |
54 | struct raw3270_request init_readpart; | |
55 | struct raw3270_request init_readmod; | |
132fab13 | 56 | unsigned char init_data[256]; |
1da177e4 LT |
57 | }; |
58 | ||
4d334fd1 MS |
59 | /* raw3270->state */ |
60 | #define RAW3270_STATE_INIT 0 /* Initial state */ | |
61 | #define RAW3270_STATE_RESET 1 /* Reset command is pending */ | |
62 | #define RAW3270_STATE_W4ATTN 2 /* Wait for attention interrupt */ | |
63 | #define RAW3270_STATE_READMOD 3 /* Read partition is pending */ | |
64 | #define RAW3270_STATE_READY 4 /* Device is usable by views */ | |
65 | ||
1da177e4 LT |
66 | /* raw3270->flags */ |
67 | #define RAW3270_FLAGS_14BITADDR 0 /* 14-bit buffer addresses */ | |
68 | #define RAW3270_FLAGS_BUSY 1 /* Device busy, leave it alone */ | |
4d334fd1 MS |
69 | #define RAW3270_FLAGS_CONSOLE 2 /* Device is the console. */ |
70 | #define RAW3270_FLAGS_FROZEN 3 /* set if 3270 is frozen for suspend */ | |
1da177e4 LT |
71 | |
72 | /* Semaphore to protect global data of raw3270 (devices, views, etc). */ | |
14cc3e2b | 73 | static DEFINE_MUTEX(raw3270_mutex); |
1da177e4 LT |
74 | |
75 | /* List of 3270 devices. */ | |
c11ca97e | 76 | static LIST_HEAD(raw3270_devices); |
1da177e4 LT |
77 | |
78 | /* | |
79 | * Flag to indicate if the driver has been registered. Some operations | |
80 | * like waiting for the end of i/o need to be done differently as long | |
81 | * as the kernel is still starting up (console support). | |
82 | */ | |
83 | static int raw3270_registered; | |
84 | ||
85 | /* Module parameters */ | |
970ba6ac | 86 | static bool tubxcorrect; |
1da177e4 LT |
87 | module_param(tubxcorrect, bool, 0); |
88 | ||
89 | /* | |
90 | * Wait queue for device init/delete, view delete. | |
91 | */ | |
92 | DECLARE_WAIT_QUEUE_HEAD(raw3270_wait_queue); | |
93 | ||
7e36eff1 MS |
94 | static void __raw3270_disconnect(struct raw3270 *rp); |
95 | ||
1da177e4 LT |
96 | /* |
97 | * Encode array for 12 bit 3270 addresses. | |
98 | */ | |
2b67fc46 | 99 | static unsigned char raw3270_ebcgraf[64] = { |
1da177e4 LT |
100 | 0x40, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, |
101 | 0xc8, 0xc9, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, | |
102 | 0x50, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, | |
103 | 0xd8, 0xd9, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, | |
104 | 0x60, 0x61, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, | |
105 | 0xe8, 0xe9, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, | |
106 | 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, | |
107 | 0xf8, 0xf9, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f | |
108 | }; | |
109 | ||
4d334fd1 MS |
110 | static inline int raw3270_state_ready(struct raw3270 *rp) |
111 | { | |
112 | return rp->state == RAW3270_STATE_READY; | |
113 | } | |
114 | ||
115 | static inline int raw3270_state_final(struct raw3270 *rp) | |
116 | { | |
117 | return rp->state == RAW3270_STATE_INIT || | |
118 | rp->state == RAW3270_STATE_READY; | |
119 | } | |
120 | ||
1da177e4 LT |
121 | void |
122 | raw3270_buffer_address(struct raw3270 *rp, char *cp, unsigned short addr) | |
123 | { | |
124 | if (test_bit(RAW3270_FLAGS_14BITADDR, &rp->flags)) { | |
125 | cp[0] = (addr >> 8) & 0x3f; | |
126 | cp[1] = addr & 0xff; | |
127 | } else { | |
128 | cp[0] = raw3270_ebcgraf[(addr >> 6) & 0x3f]; | |
129 | cp[1] = raw3270_ebcgraf[addr & 0x3f]; | |
130 | } | |
131 | } | |
132 | ||
133 | /* | |
134 | * Allocate a new 3270 ccw request | |
135 | */ | |
136 | struct raw3270_request * | |
137 | raw3270_request_alloc(size_t size) | |
138 | { | |
139 | struct raw3270_request *rq; | |
140 | ||
141 | /* Allocate request structure */ | |
88abaab4 | 142 | rq = kzalloc(sizeof(struct raw3270_request), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
143 | if (!rq) |
144 | return ERR_PTR(-ENOMEM); | |
1da177e4 LT |
145 | |
146 | /* alloc output buffer. */ | |
147 | if (size > 0) { | |
148 | rq->buffer = kmalloc(size, GFP_KERNEL | GFP_DMA); | |
149 | if (!rq->buffer) { | |
150 | kfree(rq); | |
151 | return ERR_PTR(-ENOMEM); | |
152 | } | |
153 | } | |
154 | rq->size = size; | |
155 | INIT_LIST_HEAD(&rq->list); | |
156 | ||
157 | /* | |
158 | * Setup ccw. | |
159 | */ | |
160 | rq->ccw.cda = __pa(rq->buffer); | |
161 | rq->ccw.flags = CCW_FLAG_SLI; | |
162 | ||
163 | return rq; | |
164 | } | |
165 | ||
1da177e4 LT |
166 | /* |
167 | * Free 3270 ccw request | |
168 | */ | |
169 | void | |
170 | raw3270_request_free (struct raw3270_request *rq) | |
171 | { | |
17fd682e | 172 | kfree(rq->buffer); |
1da177e4 LT |
173 | kfree(rq); |
174 | } | |
175 | ||
176 | /* | |
177 | * Reset request to initial state. | |
178 | */ | |
179 | void | |
180 | raw3270_request_reset(struct raw3270_request *rq) | |
181 | { | |
182 | BUG_ON(!list_empty(&rq->list)); | |
183 | rq->ccw.cmd_code = 0; | |
184 | rq->ccw.count = 0; | |
185 | rq->ccw.cda = __pa(rq->buffer); | |
186 | rq->ccw.flags = CCW_FLAG_SLI; | |
187 | rq->rescnt = 0; | |
188 | rq->rc = 0; | |
189 | } | |
190 | ||
191 | /* | |
192 | * Set command code to ccw of a request. | |
193 | */ | |
194 | void | |
195 | raw3270_request_set_cmd(struct raw3270_request *rq, u8 cmd) | |
196 | { | |
197 | rq->ccw.cmd_code = cmd; | |
198 | } | |
199 | ||
200 | /* | |
201 | * Add data fragment to output buffer. | |
202 | */ | |
203 | int | |
204 | raw3270_request_add_data(struct raw3270_request *rq, void *data, size_t size) | |
205 | { | |
206 | if (size + rq->ccw.count > rq->size) | |
207 | return -E2BIG; | |
208 | memcpy(rq->buffer + rq->ccw.count, data, size); | |
209 | rq->ccw.count += size; | |
210 | return 0; | |
211 | } | |
212 | ||
213 | /* | |
214 | * Set address/length pair to ccw of a request. | |
215 | */ | |
216 | void | |
217 | raw3270_request_set_data(struct raw3270_request *rq, void *data, size_t size) | |
218 | { | |
219 | rq->ccw.cda = __pa(data); | |
220 | rq->ccw.count = size; | |
221 | } | |
222 | ||
223 | /* | |
224 | * Set idal buffer to ccw of a request. | |
225 | */ | |
226 | void | |
227 | raw3270_request_set_idal(struct raw3270_request *rq, struct idal_buffer *ib) | |
228 | { | |
229 | rq->ccw.cda = __pa(ib->data); | |
230 | rq->ccw.count = ib->size; | |
231 | rq->ccw.flags |= CCW_FLAG_IDA; | |
232 | } | |
233 | ||
1da177e4 LT |
234 | /* |
235 | * Add the request to the request queue, try to start it if the | |
236 | * 3270 device is idle. Return without waiting for end of i/o. | |
237 | */ | |
238 | static int | |
239 | __raw3270_start(struct raw3270 *rp, struct raw3270_view *view, | |
240 | struct raw3270_request *rq) | |
241 | { | |
242 | rq->view = view; | |
243 | raw3270_get_view(view); | |
244 | if (list_empty(&rp->req_queue) && | |
245 | !test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) { | |
246 | /* No other requests are on the queue. Start this one. */ | |
247 | rq->rc = ccw_device_start(rp->cdev, &rq->ccw, | |
248 | (unsigned long) rq, 0, 0); | |
249 | if (rq->rc) { | |
250 | raw3270_put_view(view); | |
251 | return rq->rc; | |
252 | } | |
253 | } | |
254 | list_add_tail(&rq->list, &rp->req_queue); | |
255 | return 0; | |
233faec9 MS |
256 | } |
257 | ||
258 | int | |
259 | raw3270_view_active(struct raw3270_view *view) | |
260 | { | |
261 | struct raw3270 *rp = view->dev; | |
262 | ||
263 | return rp && rp->view == view && | |
264 | !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags); | |
1da177e4 LT |
265 | } |
266 | ||
267 | int | |
268 | raw3270_start(struct raw3270_view *view, struct raw3270_request *rq) | |
269 | { | |
270 | unsigned long flags; | |
271 | struct raw3270 *rp; | |
272 | int rc; | |
273 | ||
274 | spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); | |
275 | rp = view->dev; | |
4b214a0c MS |
276 | if (!rp || rp->view != view || |
277 | test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
1da177e4 | 278 | rc = -EACCES; |
4d334fd1 MS |
279 | else if (!raw3270_state_ready(rp)) |
280 | rc = -EBUSY; | |
1da177e4 LT |
281 | else |
282 | rc = __raw3270_start(rp, view, rq); | |
283 | spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); | |
284 | return rc; | |
285 | } | |
286 | ||
ed3cb6f0 RH |
287 | int |
288 | raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq) | |
289 | { | |
290 | struct raw3270 *rp; | |
291 | int rc; | |
292 | ||
293 | rp = view->dev; | |
4b214a0c MS |
294 | if (!rp || rp->view != view || |
295 | test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
ed3cb6f0 | 296 | rc = -EACCES; |
4d334fd1 MS |
297 | else if (!raw3270_state_ready(rp)) |
298 | rc = -EBUSY; | |
ed3cb6f0 RH |
299 | else |
300 | rc = __raw3270_start(rp, view, rq); | |
301 | return rc; | |
302 | } | |
303 | ||
1da177e4 LT |
304 | int |
305 | raw3270_start_irq(struct raw3270_view *view, struct raw3270_request *rq) | |
306 | { | |
307 | struct raw3270 *rp; | |
308 | ||
309 | rp = view->dev; | |
310 | rq->view = view; | |
311 | raw3270_get_view(view); | |
312 | list_add_tail(&rq->list, &rp->req_queue); | |
313 | return 0; | |
314 | } | |
315 | ||
316 | /* | |
317 | * 3270 interrupt routine, called from the ccw_device layer | |
318 | */ | |
319 | static void | |
320 | raw3270_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb) | |
321 | { | |
322 | struct raw3270 *rp; | |
323 | struct raw3270_view *view; | |
324 | struct raw3270_request *rq; | |
1da177e4 | 325 | |
dff59b64 | 326 | rp = dev_get_drvdata(&cdev->dev); |
1da177e4 LT |
327 | if (!rp) |
328 | return; | |
329 | rq = (struct raw3270_request *) intparm; | |
330 | view = rq ? rq->view : rp->view; | |
331 | ||
8340ab60 | 332 | if (!IS_ERR(irb)) { |
1da177e4 | 333 | /* Handle CE-DE-UE and subsequent UDE */ |
8340ab60 | 334 | if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) |
1da177e4 | 335 | clear_bit(RAW3270_FLAGS_BUSY, &rp->flags); |
8340ab60 MS |
336 | if (irb->scsw.cmd.dstat == (DEV_STAT_CHN_END | |
337 | DEV_STAT_DEV_END | | |
338 | DEV_STAT_UNIT_EXCEP)) | |
339 | set_bit(RAW3270_FLAGS_BUSY, &rp->flags); | |
340 | /* Handle disconnected devices */ | |
341 | if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) && | |
7e36eff1 | 342 | (irb->ecw[0] & SNS0_INTERVENTION_REQ)) { |
8340ab60 | 343 | set_bit(RAW3270_FLAGS_BUSY, &rp->flags); |
7e36eff1 MS |
344 | if (rp->state > RAW3270_STATE_RESET) |
345 | __raw3270_disconnect(rp); | |
346 | } | |
8340ab60 MS |
347 | /* Call interrupt handler of the view */ |
348 | if (view) | |
349 | view->fn->intv(view, rq, irb); | |
350 | } | |
1da177e4 | 351 | |
8340ab60 MS |
352 | if (test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) |
353 | /* Device busy, do not start I/O */ | |
1da177e4 | 354 | return; |
8340ab60 | 355 | |
7e36eff1 | 356 | if (rq && !list_empty(&rq->list)) { |
1da177e4 LT |
357 | /* The request completed, remove from queue and do callback. */ |
358 | list_del_init(&rq->list); | |
359 | if (rq->callback) | |
360 | rq->callback(rq, rq->callback_data); | |
361 | /* Do put_device for get_device in raw3270_start. */ | |
362 | raw3270_put_view(view); | |
363 | } | |
8340ab60 | 364 | |
1da177e4 LT |
365 | /* |
366 | * Try to start each request on request queue until one is | |
367 | * started successful. | |
368 | */ | |
369 | while (!list_empty(&rp->req_queue)) { | |
370 | rq = list_entry(rp->req_queue.next,struct raw3270_request,list); | |
371 | rq->rc = ccw_device_start(rp->cdev, &rq->ccw, | |
372 | (unsigned long) rq, 0, 0); | |
373 | if (rq->rc == 0) | |
374 | break; | |
375 | /* Start failed. Remove request and do callback. */ | |
376 | list_del_init(&rq->list); | |
377 | if (rq->callback) | |
378 | rq->callback(rq, rq->callback_data); | |
379 | /* Do put_device for get_device in raw3270_start. */ | |
380 | raw3270_put_view(view); | |
381 | } | |
382 | } | |
383 | ||
384 | /* | |
4d334fd1 MS |
385 | * To determine the size of the 3270 device we need to do: |
386 | * 1) send a 'read partition' data stream to the device | |
387 | * 2) wait for the attn interrupt that precedes the query reply | |
388 | * 3) do a read modified to get the query reply | |
389 | * To make things worse we have to cope with intervention | |
390 | * required (3270 device switched to 'stand-by') and command | |
391 | * rejects (old devices that can't do 'read partition'). | |
1da177e4 | 392 | */ |
1da177e4 LT |
393 | struct raw3270_ua { /* Query Reply structure for Usable Area */ |
394 | struct { /* Usable Area Query Reply Base */ | |
395 | short l; /* Length of this structured field */ | |
396 | char sfid; /* 0x81 if Query Reply */ | |
397 | char qcode; /* 0x81 if Usable Area */ | |
398 | char flags0; | |
399 | char flags1; | |
400 | short w; /* Width of usable area */ | |
401 | short h; /* Heigth of usavle area */ | |
402 | char units; /* 0x00:in; 0x01:mm */ | |
403 | int xr; | |
404 | int yr; | |
405 | char aw; | |
406 | char ah; | |
407 | short buffsz; /* Character buffer size, bytes */ | |
408 | char xmin; | |
409 | char ymin; | |
410 | char xmax; | |
411 | char ymax; | |
412 | } __attribute__ ((packed)) uab; | |
413 | struct { /* Alternate Usable Area Self-Defining Parameter */ | |
414 | char l; /* Length of this Self-Defining Parm */ | |
415 | char sdpid; /* 0x02 if Alternate Usable Area */ | |
416 | char res; | |
417 | char auaid; /* 0x01 is Id for the A U A */ | |
418 | short wauai; /* Width of AUAi */ | |
419 | short hauai; /* Height of AUAi */ | |
420 | char auaunits; /* 0x00:in, 0x01:mm */ | |
421 | int auaxr; | |
422 | int auayr; | |
423 | char awauai; | |
424 | char ahauai; | |
425 | } __attribute__ ((packed)) aua; | |
426 | } __attribute__ ((packed)); | |
427 | ||
1da177e4 | 428 | static void |
4d334fd1 | 429 | raw3270_size_device_vm(struct raw3270 *rp) |
1da177e4 LT |
430 | { |
431 | int rc, model; | |
9a92fe48 | 432 | struct ccw_dev_id dev_id; |
4d334fd1 | 433 | struct diag210 diag_data; |
1da177e4 | 434 | |
9a92fe48 | 435 | ccw_device_get_id(rp->cdev, &dev_id); |
4d334fd1 MS |
436 | diag_data.vrdcdvno = dev_id.devno; |
437 | diag_data.vrdclen = sizeof(struct diag210); | |
438 | rc = diag210(&diag_data); | |
439 | model = diag_data.vrdccrmd; | |
440 | /* Use default model 2 if the size could not be detected */ | |
441 | if (rc || model < 2 || model > 5) | |
442 | model = 2; | |
1da177e4 LT |
443 | switch (model) { |
444 | case 2: | |
445 | rp->model = model; | |
446 | rp->rows = 24; | |
447 | rp->cols = 80; | |
448 | break; | |
449 | case 3: | |
450 | rp->model = model; | |
451 | rp->rows = 32; | |
452 | rp->cols = 80; | |
453 | break; | |
454 | case 4: | |
455 | rp->model = model; | |
456 | rp->rows = 43; | |
457 | rp->cols = 80; | |
458 | break; | |
459 | case 5: | |
460 | rp->model = model; | |
461 | rp->rows = 27; | |
462 | rp->cols = 132; | |
463 | break; | |
1da177e4 | 464 | } |
1da177e4 LT |
465 | } |
466 | ||
4d334fd1 MS |
467 | static void |
468 | raw3270_size_device(struct raw3270 *rp) | |
1da177e4 | 469 | { |
1da177e4 | 470 | struct raw3270_ua *uap; |
1da177e4 | 471 | |
1da177e4 | 472 | /* Got a Query Reply */ |
132fab13 | 473 | uap = (struct raw3270_ua *) (rp->init_data + 1); |
1da177e4 | 474 | /* Paranoia check. */ |
4d334fd1 MS |
475 | if (rp->init_readmod.rc || rp->init_data[0] != 0x88 || |
476 | uap->uab.qcode != 0x81) { | |
477 | /* Couldn't detect size. Use default model 2. */ | |
478 | rp->model = 2; | |
479 | rp->rows = 24; | |
480 | rp->cols = 80; | |
481 | return; | |
482 | } | |
1da177e4 LT |
483 | /* Copy rows/columns of default Usable Area */ |
484 | rp->rows = uap->uab.h; | |
485 | rp->cols = uap->uab.w; | |
486 | /* Check for 14 bit addressing */ | |
487 | if ((uap->uab.flags0 & 0x0d) == 0x01) | |
488 | set_bit(RAW3270_FLAGS_14BITADDR, &rp->flags); | |
489 | /* Check for Alternate Usable Area */ | |
490 | if (uap->uab.l == sizeof(struct raw3270_ua) && | |
491 | uap->aua.sdpid == 0x02) { | |
492 | rp->rows = uap->aua.hauai; | |
493 | rp->cols = uap->aua.wauai; | |
494 | } | |
4d334fd1 MS |
495 | /* Try to find a model. */ |
496 | rp->model = 0; | |
497 | if (rp->rows == 24 && rp->cols == 80) | |
498 | rp->model = 2; | |
499 | if (rp->rows == 32 && rp->cols == 80) | |
500 | rp->model = 3; | |
501 | if (rp->rows == 43 && rp->cols == 80) | |
502 | rp->model = 4; | |
503 | if (rp->rows == 27 && rp->cols == 132) | |
504 | rp->model = 5; | |
1da177e4 LT |
505 | } |
506 | ||
4d334fd1 MS |
507 | static void |
508 | raw3270_size_device_done(struct raw3270 *rp) | |
1da177e4 | 509 | { |
4d334fd1 | 510 | struct raw3270_view *view; |
1da177e4 | 511 | |
d2c993d8 | 512 | rp->view = NULL; |
4d334fd1 MS |
513 | rp->state = RAW3270_STATE_READY; |
514 | /* Notify views about new size */ | |
515 | list_for_each_entry(view, &rp->view_list, list) | |
516 | if (view->fn->resize) | |
517 | view->fn->resize(view, rp->model, rp->rows, rp->cols); | |
518 | /* Setup processing done, now activate a view */ | |
519 | list_for_each_entry(view, &rp->view_list, list) { | |
520 | rp->view = view; | |
521 | if (view->fn->activate(view) == 0) | |
522 | break; | |
523 | rp->view = NULL; | |
1da177e4 | 524 | } |
4d334fd1 MS |
525 | } |
526 | ||
527 | static void | |
528 | raw3270_read_modified_cb(struct raw3270_request *rq, void *data) | |
529 | { | |
530 | struct raw3270 *rp = rq->view->dev; | |
531 | ||
532 | raw3270_size_device(rp); | |
533 | raw3270_size_device_done(rp); | |
534 | } | |
535 | ||
536 | static void | |
537 | raw3270_read_modified(struct raw3270 *rp) | |
538 | { | |
539 | if (rp->state != RAW3270_STATE_W4ATTN) | |
540 | return; | |
541 | /* Use 'read modified' to get the result of a read partition. */ | |
542 | memset(&rp->init_readmod, 0, sizeof(rp->init_readmod)); | |
543 | memset(&rp->init_data, 0, sizeof(rp->init_data)); | |
544 | rp->init_readmod.ccw.cmd_code = TC_READMOD; | |
545 | rp->init_readmod.ccw.flags = CCW_FLAG_SLI; | |
546 | rp->init_readmod.ccw.count = sizeof(rp->init_data); | |
547 | rp->init_readmod.ccw.cda = (__u32) __pa(rp->init_data); | |
548 | rp->init_readmod.callback = raw3270_read_modified_cb; | |
549 | rp->state = RAW3270_STATE_READMOD; | |
550 | raw3270_start_irq(&rp->init_view, &rp->init_readmod); | |
551 | } | |
552 | ||
553 | static void | |
554 | raw3270_writesf_readpart(struct raw3270 *rp) | |
555 | { | |
556 | static const unsigned char wbuf[] = | |
557 | { 0x00, 0x07, 0x01, 0xff, 0x03, 0x00, 0x81 }; | |
558 | ||
559 | /* Store 'read partition' data stream to init_data */ | |
560 | memset(&rp->init_readpart, 0, sizeof(rp->init_readpart)); | |
561 | memset(&rp->init_data, 0, sizeof(rp->init_data)); | |
562 | memcpy(&rp->init_data, wbuf, sizeof(wbuf)); | |
563 | rp->init_readpart.ccw.cmd_code = TC_WRITESF; | |
564 | rp->init_readpart.ccw.flags = CCW_FLAG_SLI; | |
565 | rp->init_readpart.ccw.count = sizeof(wbuf); | |
566 | rp->init_readpart.ccw.cda = (__u32) __pa(&rp->init_data); | |
567 | rp->state = RAW3270_STATE_W4ATTN; | |
568 | raw3270_start_irq(&rp->init_view, &rp->init_readpart); | |
569 | } | |
570 | ||
571 | /* | |
572 | * Device reset | |
573 | */ | |
574 | static void | |
575 | raw3270_reset_device_cb(struct raw3270_request *rq, void *data) | |
576 | { | |
577 | struct raw3270 *rp = rq->view->dev; | |
578 | ||
579 | if (rp->state != RAW3270_STATE_RESET) | |
580 | return; | |
dc3ac5ff | 581 | if (rq->rc) { |
4d334fd1 MS |
582 | /* Reset command failed. */ |
583 | rp->state = RAW3270_STATE_INIT; | |
01a7cfa2 | 584 | } else if (MACHINE_IS_VM) { |
4d334fd1 MS |
585 | raw3270_size_device_vm(rp); |
586 | raw3270_size_device_done(rp); | |
587 | } else | |
588 | raw3270_writesf_readpart(rp); | |
bd1cb5de | 589 | memset(&rp->init_reset, 0, sizeof(rp->init_reset)); |
1da177e4 LT |
590 | } |
591 | ||
592 | static int | |
4d334fd1 | 593 | __raw3270_reset_device(struct raw3270 *rp) |
1da177e4 LT |
594 | { |
595 | int rc; | |
596 | ||
bd1cb5de MS |
597 | /* Check if reset is already pending */ |
598 | if (rp->init_reset.view) | |
599 | return -EBUSY; | |
4d334fd1 | 600 | /* Store reset data stream to init_data/init_reset */ |
132fab13 | 601 | rp->init_data[0] = TW_KR; |
4d334fd1 MS |
602 | rp->init_reset.ccw.cmd_code = TC_EWRITEA; |
603 | rp->init_reset.ccw.flags = CCW_FLAG_SLI; | |
604 | rp->init_reset.ccw.count = 1; | |
605 | rp->init_reset.ccw.cda = (__u32) __pa(rp->init_data); | |
606 | rp->init_reset.callback = raw3270_reset_device_cb; | |
607 | rc = __raw3270_start(rp, &rp->init_view, &rp->init_reset); | |
608 | if (rc == 0 && rp->state == RAW3270_STATE_INIT) | |
609 | rp->state = RAW3270_STATE_RESET; | |
610 | return rc; | |
611 | } | |
612 | ||
613 | static int | |
614 | raw3270_reset_device(struct raw3270 *rp) | |
615 | { | |
616 | unsigned long flags; | |
617 | int rc; | |
618 | ||
619 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
620 | rc = __raw3270_reset_device(rp); | |
621 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1da177e4 LT |
622 | return rc; |
623 | } | |
624 | ||
ed3cb6f0 RH |
625 | int |
626 | raw3270_reset(struct raw3270_view *view) | |
627 | { | |
628 | struct raw3270 *rp; | |
629 | int rc; | |
630 | ||
631 | rp = view->dev; | |
4b214a0c MS |
632 | if (!rp || rp->view != view || |
633 | test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
ed3cb6f0 | 634 | rc = -EACCES; |
4d334fd1 MS |
635 | else if (!raw3270_state_ready(rp)) |
636 | rc = -EBUSY; | |
ed3cb6f0 RH |
637 | else |
638 | rc = raw3270_reset_device(view->dev); | |
639 | return rc; | |
640 | } | |
641 | ||
7e36eff1 MS |
642 | static void |
643 | __raw3270_disconnect(struct raw3270 *rp) | |
644 | { | |
645 | struct raw3270_request *rq; | |
646 | struct raw3270_view *view; | |
647 | ||
648 | rp->state = RAW3270_STATE_INIT; | |
649 | rp->view = &rp->init_view; | |
650 | /* Cancel all queued requests */ | |
651 | while (!list_empty(&rp->req_queue)) { | |
652 | rq = list_entry(rp->req_queue.next,struct raw3270_request,list); | |
653 | view = rq->view; | |
654 | rq->rc = -EACCES; | |
655 | list_del_init(&rq->list); | |
656 | if (rq->callback) | |
657 | rq->callback(rq, rq->callback_data); | |
658 | raw3270_put_view(view); | |
659 | } | |
660 | /* Start from scratch */ | |
661 | __raw3270_reset_device(rp); | |
662 | } | |
663 | ||
8340ab60 | 664 | static void |
4d334fd1 MS |
665 | raw3270_init_irq(struct raw3270_view *view, struct raw3270_request *rq, |
666 | struct irb *irb) | |
667 | { | |
668 | struct raw3270 *rp; | |
669 | ||
4d334fd1 MS |
670 | if (rq) { |
671 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { | |
672 | if (irb->ecw[0] & SNS0_CMD_REJECT) | |
673 | rq->rc = -EOPNOTSUPP; | |
674 | else | |
675 | rq->rc = -EIO; | |
676 | } | |
677 | } | |
678 | if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { | |
679 | /* Queue read modified after attention interrupt */ | |
680 | rp = view->dev; | |
681 | raw3270_read_modified(rp); | |
682 | } | |
4d334fd1 MS |
683 | } |
684 | ||
685 | static struct raw3270_fn raw3270_init_fn = { | |
686 | .intv = raw3270_init_irq | |
687 | }; | |
688 | ||
1da177e4 LT |
689 | /* |
690 | * Setup new 3270 device. | |
691 | */ | |
692 | static int | |
693 | raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc) | |
694 | { | |
695 | struct list_head *l; | |
696 | struct raw3270 *tmp; | |
697 | int minor; | |
698 | ||
699 | memset(rp, 0, sizeof(struct raw3270)); | |
700 | /* Copy ebcdic -> ascii translation table. */ | |
701 | memcpy(ascebc, _ascebc, 256); | |
702 | if (tubxcorrect) { | |
703 | /* correct brackets and circumflex */ | |
704 | ascebc['['] = 0xad; | |
705 | ascebc[']'] = 0xbd; | |
706 | ascebc['^'] = 0xb0; | |
707 | } | |
708 | rp->ascebc = ascebc; | |
709 | ||
710 | /* Set defaults. */ | |
711 | rp->rows = 24; | |
712 | rp->cols = 80; | |
713 | ||
714 | INIT_LIST_HEAD(&rp->req_queue); | |
715 | INIT_LIST_HEAD(&rp->view_list); | |
716 | ||
4d334fd1 MS |
717 | rp->init_view.dev = rp; |
718 | rp->init_view.fn = &raw3270_init_fn; | |
719 | rp->view = &rp->init_view; | |
720 | ||
1da177e4 LT |
721 | /* |
722 | * Add device to list and find the smallest unused minor | |
ed3cb6f0 RH |
723 | * number for it. Note: there is no device with minor 0, |
724 | * see special case for fs3270.c:fs3270_open(). | |
1da177e4 | 725 | */ |
14cc3e2b | 726 | mutex_lock(&raw3270_mutex); |
1da177e4 | 727 | /* Keep the list sorted. */ |
ed3cb6f0 | 728 | minor = RAW3270_FIRSTMINOR; |
1da177e4 LT |
729 | rp->minor = -1; |
730 | list_for_each(l, &raw3270_devices) { | |
731 | tmp = list_entry(l, struct raw3270, list); | |
732 | if (tmp->minor > minor) { | |
733 | rp->minor = minor; | |
734 | __list_add(&rp->list, l->prev, l); | |
735 | break; | |
736 | } | |
737 | minor++; | |
738 | } | |
ed3cb6f0 | 739 | if (rp->minor == -1 && minor < RAW3270_MAXDEVS + RAW3270_FIRSTMINOR) { |
1da177e4 LT |
740 | rp->minor = minor; |
741 | list_add_tail(&rp->list, &raw3270_devices); | |
742 | } | |
14cc3e2b | 743 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
744 | /* No free minor number? Then give up. */ |
745 | if (rp->minor == -1) | |
746 | return -EUSERS; | |
747 | rp->cdev = cdev; | |
dff59b64 | 748 | dev_set_drvdata(&cdev->dev, rp); |
1da177e4 LT |
749 | cdev->handler = raw3270_irq; |
750 | return 0; | |
751 | } | |
752 | ||
753 | #ifdef CONFIG_TN3270_CONSOLE | |
2253e8d7 SO |
754 | /* Tentative definition - see below for actual definition. */ |
755 | static struct ccw_driver raw3270_ccw_driver; | |
756 | ||
1da177e4 LT |
757 | /* |
758 | * Setup 3270 device configured as console. | |
759 | */ | |
2253e8d7 | 760 | struct raw3270 __init *raw3270_setup_console(void) |
1da177e4 | 761 | { |
2253e8d7 | 762 | struct ccw_device *cdev; |
4d334fd1 | 763 | unsigned long flags; |
1da177e4 LT |
764 | struct raw3270 *rp; |
765 | char *ascebc; | |
766 | int rc; | |
767 | ||
1e532096 | 768 | cdev = ccw_device_create_console(&raw3270_ccw_driver); |
2253e8d7 SO |
769 | if (IS_ERR(cdev)) |
770 | return ERR_CAST(cdev); | |
771 | ||
33403dcf HC |
772 | rp = kzalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); |
773 | ascebc = kzalloc(256, GFP_KERNEL); | |
1da177e4 LT |
774 | rc = raw3270_setup_device(cdev, rp, ascebc); |
775 | if (rc) | |
776 | return ERR_PTR(rc); | |
777 | set_bit(RAW3270_FLAGS_CONSOLE, &rp->flags); | |
1e532096 SO |
778 | |
779 | rc = ccw_device_enable_console(cdev); | |
780 | if (rc) { | |
781 | ccw_device_destroy_console(cdev); | |
782 | return ERR_PTR(rc); | |
783 | } | |
784 | ||
4d334fd1 MS |
785 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); |
786 | do { | |
787 | __raw3270_reset_device(rp); | |
788 | while (!raw3270_state_final(rp)) { | |
188561a4 | 789 | ccw_device_wait_idle(rp->cdev); |
4d334fd1 MS |
790 | barrier(); |
791 | } | |
792 | } while (rp->state != RAW3270_STATE_READY); | |
793 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1da177e4 LT |
794 | return rp; |
795 | } | |
796 | ||
797 | void | |
798 | raw3270_wait_cons_dev(struct raw3270 *rp) | |
799 | { | |
800 | unsigned long flags; | |
801 | ||
802 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
188561a4 | 803 | ccw_device_wait_idle(rp->cdev); |
1da177e4 LT |
804 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); |
805 | } | |
806 | ||
807 | #endif | |
808 | ||
809 | /* | |
810 | * Create a 3270 device structure. | |
811 | */ | |
812 | static struct raw3270 * | |
813 | raw3270_create_device(struct ccw_device *cdev) | |
814 | { | |
815 | struct raw3270 *rp; | |
816 | char *ascebc; | |
817 | int rc; | |
818 | ||
bd1cb5de | 819 | rp = kzalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
820 | if (!rp) |
821 | return ERR_PTR(-ENOMEM); | |
822 | ascebc = kmalloc(256, GFP_KERNEL); | |
823 | if (!ascebc) { | |
824 | kfree(rp); | |
825 | return ERR_PTR(-ENOMEM); | |
826 | } | |
827 | rc = raw3270_setup_device(cdev, rp, ascebc); | |
828 | if (rc) { | |
829 | kfree(rp->ascebc); | |
830 | kfree(rp); | |
831 | rp = ERR_PTR(rc); | |
832 | } | |
833 | /* Get reference to ccw_device structure. */ | |
834 | get_device(&cdev->dev); | |
835 | return rp; | |
836 | } | |
837 | ||
838 | /* | |
839 | * Activate a view. | |
840 | */ | |
841 | int | |
842 | raw3270_activate_view(struct raw3270_view *view) | |
843 | { | |
844 | struct raw3270 *rp; | |
845 | struct raw3270_view *oldview, *nv; | |
846 | unsigned long flags; | |
847 | int rc; | |
848 | ||
849 | rp = view->dev; | |
850 | if (!rp) | |
851 | return -ENODEV; | |
852 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
853 | if (rp->view == view) | |
854 | rc = 0; | |
4d334fd1 MS |
855 | else if (!raw3270_state_ready(rp)) |
856 | rc = -EBUSY; | |
4b214a0c MS |
857 | else if (test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) |
858 | rc = -EACCES; | |
1da177e4 | 859 | else { |
d2c993d8 | 860 | oldview = NULL; |
4d334fd1 | 861 | if (rp->view && rp->view->fn->deactivate) { |
1da177e4 LT |
862 | oldview = rp->view; |
863 | oldview->fn->deactivate(oldview); | |
864 | } | |
865 | rp->view = view; | |
866 | rc = view->fn->activate(view); | |
867 | if (rc) { | |
868 | /* Didn't work. Try to reactivate the old view. */ | |
869 | rp->view = oldview; | |
870 | if (!oldview || oldview->fn->activate(oldview) != 0) { | |
871 | /* Didn't work as well. Try any other view. */ | |
872 | list_for_each_entry(nv, &rp->view_list, list) | |
873 | if (nv != view && nv != oldview) { | |
874 | rp->view = nv; | |
875 | if (nv->fn->activate(nv) == 0) | |
876 | break; | |
d2c993d8 | 877 | rp->view = NULL; |
1da177e4 LT |
878 | } |
879 | } | |
880 | } | |
881 | } | |
882 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
883 | return rc; | |
884 | } | |
885 | ||
886 | /* | |
887 | * Deactivate current view. | |
888 | */ | |
889 | void | |
890 | raw3270_deactivate_view(struct raw3270_view *view) | |
891 | { | |
892 | unsigned long flags; | |
893 | struct raw3270 *rp; | |
894 | ||
895 | rp = view->dev; | |
896 | if (!rp) | |
897 | return; | |
898 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
899 | if (rp->view == view) { | |
900 | view->fn->deactivate(view); | |
d2c993d8 | 901 | rp->view = NULL; |
1da177e4 LT |
902 | /* Move deactivated view to end of list. */ |
903 | list_del_init(&view->list); | |
904 | list_add_tail(&view->list, &rp->view_list); | |
905 | /* Try to activate another view. */ | |
4d334fd1 | 906 | if (raw3270_state_ready(rp) && |
4b214a0c | 907 | !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) { |
ed3cb6f0 RH |
908 | list_for_each_entry(view, &rp->view_list, list) { |
909 | rp->view = view; | |
910 | if (view->fn->activate(view) == 0) | |
1da177e4 | 911 | break; |
d2c993d8 | 912 | rp->view = NULL; |
ed3cb6f0 | 913 | } |
1da177e4 LT |
914 | } |
915 | } | |
916 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
917 | } | |
918 | ||
919 | /* | |
920 | * Add view to device with minor "minor". | |
921 | */ | |
922 | int | |
4454e135 | 923 | raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn, int minor, int subclass) |
1da177e4 LT |
924 | { |
925 | unsigned long flags; | |
926 | struct raw3270 *rp; | |
927 | int rc; | |
928 | ||
ed3cb6f0 RH |
929 | if (minor <= 0) |
930 | return -ENODEV; | |
14cc3e2b | 931 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
932 | rc = -ENODEV; |
933 | list_for_each_entry(rp, &raw3270_devices, list) { | |
934 | if (rp->minor != minor) | |
935 | continue; | |
936 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
4d334fd1 MS |
937 | atomic_set(&view->ref_count, 2); |
938 | view->dev = rp; | |
939 | view->fn = fn; | |
940 | view->model = rp->model; | |
941 | view->rows = rp->rows; | |
942 | view->cols = rp->cols; | |
943 | view->ascebc = rp->ascebc; | |
944 | spin_lock_init(&view->lock); | |
4454e135 | 945 | lockdep_set_subclass(&view->lock, subclass); |
4d334fd1 MS |
946 | list_add(&view->list, &rp->view_list); |
947 | rc = 0; | |
1da177e4 LT |
948 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); |
949 | break; | |
950 | } | |
14cc3e2b | 951 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
952 | return rc; |
953 | } | |
954 | ||
955 | /* | |
956 | * Find specific view of device with minor "minor". | |
957 | */ | |
958 | struct raw3270_view * | |
959 | raw3270_find_view(struct raw3270_fn *fn, int minor) | |
960 | { | |
961 | struct raw3270 *rp; | |
962 | struct raw3270_view *view, *tmp; | |
963 | unsigned long flags; | |
964 | ||
14cc3e2b | 965 | mutex_lock(&raw3270_mutex); |
1da177e4 LT |
966 | view = ERR_PTR(-ENODEV); |
967 | list_for_each_entry(rp, &raw3270_devices, list) { | |
968 | if (rp->minor != minor) | |
969 | continue; | |
970 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
4d334fd1 MS |
971 | list_for_each_entry(tmp, &rp->view_list, list) { |
972 | if (tmp->fn == fn) { | |
973 | raw3270_get_view(tmp); | |
974 | view = tmp; | |
975 | break; | |
1da177e4 LT |
976 | } |
977 | } | |
978 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
979 | break; | |
980 | } | |
14cc3e2b | 981 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
982 | return view; |
983 | } | |
984 | ||
985 | /* | |
986 | * Remove view from device and free view structure via call to view->fn->free. | |
987 | */ | |
988 | void | |
989 | raw3270_del_view(struct raw3270_view *view) | |
990 | { | |
991 | unsigned long flags; | |
992 | struct raw3270 *rp; | |
993 | struct raw3270_view *nv; | |
994 | ||
995 | rp = view->dev; | |
996 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
997 | if (rp->view == view) { | |
998 | view->fn->deactivate(view); | |
d2c993d8 | 999 | rp->view = NULL; |
1da177e4 LT |
1000 | } |
1001 | list_del_init(&view->list); | |
4d334fd1 | 1002 | if (!rp->view && raw3270_state_ready(rp) && |
4b214a0c | 1003 | !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) { |
1da177e4 LT |
1004 | /* Try to activate another view. */ |
1005 | list_for_each_entry(nv, &rp->view_list, list) { | |
ed3cb6f0 | 1006 | if (nv->fn->activate(nv) == 0) { |
1da177e4 LT |
1007 | rp->view = nv; |
1008 | break; | |
1009 | } | |
1010 | } | |
1011 | } | |
1012 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1013 | /* Wait for reference counter to drop to zero. */ | |
1014 | atomic_dec(&view->ref_count); | |
1015 | wait_event(raw3270_wait_queue, atomic_read(&view->ref_count) == 0); | |
1016 | if (view->fn->free) | |
1017 | view->fn->free(view); | |
1018 | } | |
1019 | ||
1020 | /* | |
1021 | * Remove a 3270 device structure. | |
1022 | */ | |
1023 | static void | |
1024 | raw3270_delete_device(struct raw3270 *rp) | |
1025 | { | |
1026 | struct ccw_device *cdev; | |
1027 | ||
1028 | /* Remove from device chain. */ | |
14cc3e2b | 1029 | mutex_lock(&raw3270_mutex); |
1da177e4 | 1030 | list_del_init(&rp->list); |
14cc3e2b | 1031 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1032 | |
1033 | /* Disconnect from ccw_device. */ | |
1034 | cdev = rp->cdev; | |
d2c993d8 | 1035 | rp->cdev = NULL; |
dff59b64 | 1036 | dev_set_drvdata(&cdev->dev, NULL); |
d2c993d8 | 1037 | cdev->handler = NULL; |
1da177e4 LT |
1038 | |
1039 | /* Put ccw_device structure. */ | |
1040 | put_device(&cdev->dev); | |
1041 | ||
1042 | /* Now free raw3270 structure. */ | |
1043 | kfree(rp->ascebc); | |
1044 | kfree(rp); | |
1045 | } | |
1046 | ||
1047 | static int | |
1048 | raw3270_probe (struct ccw_device *cdev) | |
1049 | { | |
1050 | return 0; | |
1051 | } | |
1052 | ||
1053 | /* | |
1054 | * Additional attributes for a 3270 device | |
1055 | */ | |
1056 | static ssize_t | |
3fd3c0a5 | 1057 | raw3270_model_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1058 | { |
1059 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
dff59b64 | 1060 | ((struct raw3270 *) dev_get_drvdata(dev))->model); |
1da177e4 | 1061 | } |
d2c993d8 | 1062 | static DEVICE_ATTR(model, 0444, raw3270_model_show, NULL); |
1da177e4 LT |
1063 | |
1064 | static ssize_t | |
3fd3c0a5 | 1065 | raw3270_rows_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1066 | { |
1067 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
dff59b64 | 1068 | ((struct raw3270 *) dev_get_drvdata(dev))->rows); |
1da177e4 | 1069 | } |
d2c993d8 | 1070 | static DEVICE_ATTR(rows, 0444, raw3270_rows_show, NULL); |
1da177e4 LT |
1071 | |
1072 | static ssize_t | |
3fd3c0a5 | 1073 | raw3270_columns_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1074 | { |
1075 | return snprintf(buf, PAGE_SIZE, "%i\n", | |
dff59b64 | 1076 | ((struct raw3270 *) dev_get_drvdata(dev))->cols); |
1da177e4 | 1077 | } |
d2c993d8 | 1078 | static DEVICE_ATTR(columns, 0444, raw3270_columns_show, NULL); |
1da177e4 LT |
1079 | |
1080 | static struct attribute * raw3270_attrs[] = { | |
1081 | &dev_attr_model.attr, | |
1082 | &dev_attr_rows.attr, | |
1083 | &dev_attr_columns.attr, | |
1084 | NULL, | |
1085 | }; | |
1086 | ||
cb0259ca | 1087 | static const struct attribute_group raw3270_attr_group = { |
1da177e4 LT |
1088 | .attrs = raw3270_attrs, |
1089 | }; | |
1090 | ||
d7cf0d57 | 1091 | static int raw3270_create_attributes(struct raw3270 *rp) |
1da177e4 | 1092 | { |
c95571e6 | 1093 | return sysfs_create_group(&rp->cdev->dev.kobj, &raw3270_attr_group); |
1da177e4 LT |
1094 | } |
1095 | ||
1096 | /* | |
1097 | * Notifier for device addition/removal | |
1098 | */ | |
c11ca97e | 1099 | static LIST_HEAD(raw3270_notifier); |
1da177e4 | 1100 | |
c95571e6 | 1101 | int raw3270_register_notifier(struct raw3270_notifier *notifier) |
1da177e4 | 1102 | { |
1da177e4 LT |
1103 | struct raw3270 *rp; |
1104 | ||
14cc3e2b | 1105 | mutex_lock(&raw3270_mutex); |
c95571e6 MS |
1106 | list_add_tail(¬ifier->list, &raw3270_notifier); |
1107 | list_for_each_entry(rp, &raw3270_devices, list) | |
1108 | notifier->create(rp->minor); | |
14cc3e2b | 1109 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1110 | return 0; |
1111 | } | |
1112 | ||
c95571e6 | 1113 | void raw3270_unregister_notifier(struct raw3270_notifier *notifier) |
1da177e4 | 1114 | { |
c95571e6 | 1115 | struct raw3270 *rp; |
1da177e4 | 1116 | |
14cc3e2b | 1117 | mutex_lock(&raw3270_mutex); |
c95571e6 MS |
1118 | list_for_each_entry(rp, &raw3270_devices, list) |
1119 | notifier->destroy(rp->minor); | |
1120 | list_del(¬ifier->list); | |
14cc3e2b | 1121 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1122 | } |
1123 | ||
1124 | /* | |
1125 | * Set 3270 device online. | |
1126 | */ | |
1127 | static int | |
1128 | raw3270_set_online (struct ccw_device *cdev) | |
1129 | { | |
1da177e4 | 1130 | struct raw3270_notifier *np; |
c95571e6 | 1131 | struct raw3270 *rp; |
1da177e4 LT |
1132 | int rc; |
1133 | ||
1134 | rp = raw3270_create_device(cdev); | |
1135 | if (IS_ERR(rp)) | |
1136 | return PTR_ERR(rp); | |
d7cf0d57 HC |
1137 | rc = raw3270_create_attributes(rp); |
1138 | if (rc) | |
1139 | goto failure; | |
4d334fd1 | 1140 | raw3270_reset_device(rp); |
14cc3e2b | 1141 | mutex_lock(&raw3270_mutex); |
1da177e4 | 1142 | list_for_each_entry(np, &raw3270_notifier, list) |
c95571e6 | 1143 | np->create(rp->minor); |
14cc3e2b | 1144 | mutex_unlock(&raw3270_mutex); |
1da177e4 | 1145 | return 0; |
ed3cb6f0 RH |
1146 | |
1147 | failure: | |
1148 | raw3270_delete_device(rp); | |
1149 | return rc; | |
1da177e4 LT |
1150 | } |
1151 | ||
1152 | /* | |
1153 | * Remove 3270 device structure. | |
1154 | */ | |
1155 | static void | |
1156 | raw3270_remove (struct ccw_device *cdev) | |
1157 | { | |
1158 | unsigned long flags; | |
1159 | struct raw3270 *rp; | |
1160 | struct raw3270_view *v; | |
1161 | struct raw3270_notifier *np; | |
1162 | ||
dff59b64 | 1163 | rp = dev_get_drvdata(&cdev->dev); |
ed3cb6f0 RH |
1164 | /* |
1165 | * _remove is the opposite of _probe; it's probe that | |
1166 | * should set up rp. raw3270_remove gets entered for | |
1167 | * devices even if they haven't been varied online. | |
1168 | * Thus, rp may validly be NULL here. | |
1169 | */ | |
1170 | if (rp == NULL) | |
1171 | return; | |
1da177e4 LT |
1172 | |
1173 | sysfs_remove_group(&cdev->dev.kobj, &raw3270_attr_group); | |
1174 | ||
1175 | /* Deactivate current view and remove all views. */ | |
1176 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); | |
1177 | if (rp->view) { | |
4d334fd1 MS |
1178 | if (rp->view->fn->deactivate) |
1179 | rp->view->fn->deactivate(rp->view); | |
d2c993d8 | 1180 | rp->view = NULL; |
1da177e4 LT |
1181 | } |
1182 | while (!list_empty(&rp->view_list)) { | |
1183 | v = list_entry(rp->view_list.next, struct raw3270_view, list); | |
1184 | if (v->fn->release) | |
1185 | v->fn->release(v); | |
1186 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1187 | raw3270_del_view(v); | |
1188 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); | |
1189 | } | |
1190 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1191 | ||
14cc3e2b | 1192 | mutex_lock(&raw3270_mutex); |
1da177e4 | 1193 | list_for_each_entry(np, &raw3270_notifier, list) |
c95571e6 | 1194 | np->destroy(rp->minor); |
14cc3e2b | 1195 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1196 | |
1197 | /* Reset 3270 device. */ | |
1198 | raw3270_reset_device(rp); | |
1199 | /* And finally remove it. */ | |
1200 | raw3270_delete_device(rp); | |
1201 | } | |
1202 | ||
1203 | /* | |
1204 | * Set 3270 device offline. | |
1205 | */ | |
1206 | static int | |
1207 | raw3270_set_offline (struct ccw_device *cdev) | |
1208 | { | |
1209 | struct raw3270 *rp; | |
1210 | ||
dff59b64 | 1211 | rp = dev_get_drvdata(&cdev->dev); |
1da177e4 LT |
1212 | if (test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) |
1213 | return -EBUSY; | |
1214 | raw3270_remove(cdev); | |
1215 | return 0; | |
1216 | } | |
1217 | ||
4b214a0c MS |
1218 | static int raw3270_pm_stop(struct ccw_device *cdev) |
1219 | { | |
1220 | struct raw3270 *rp; | |
1221 | struct raw3270_view *view; | |
1222 | unsigned long flags; | |
1223 | ||
4f0076f7 | 1224 | rp = dev_get_drvdata(&cdev->dev); |
4b214a0c MS |
1225 | if (!rp) |
1226 | return 0; | |
1227 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
4d334fd1 | 1228 | if (rp->view && rp->view->fn->deactivate) |
4b214a0c MS |
1229 | rp->view->fn->deactivate(rp->view); |
1230 | if (!test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) { | |
1231 | /* | |
1232 | * Release tty and fullscreen for all non-console | |
1233 | * devices. | |
1234 | */ | |
1235 | list_for_each_entry(view, &rp->view_list, list) { | |
1236 | if (view->fn->release) | |
1237 | view->fn->release(view); | |
1238 | } | |
1239 | } | |
1240 | set_bit(RAW3270_FLAGS_FROZEN, &rp->flags); | |
1241 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1242 | return 0; | |
1243 | } | |
1244 | ||
1245 | static int raw3270_pm_start(struct ccw_device *cdev) | |
1246 | { | |
1247 | struct raw3270 *rp; | |
1248 | unsigned long flags; | |
1249 | ||
4f0076f7 | 1250 | rp = dev_get_drvdata(&cdev->dev); |
4b214a0c MS |
1251 | if (!rp) |
1252 | return 0; | |
1253 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); | |
1254 | clear_bit(RAW3270_FLAGS_FROZEN, &rp->flags); | |
4d334fd1 | 1255 | if (rp->view && rp->view->fn->activate) |
4b214a0c MS |
1256 | rp->view->fn->activate(rp->view); |
1257 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); | |
1258 | return 0; | |
1259 | } | |
1260 | ||
1261 | void raw3270_pm_unfreeze(struct raw3270_view *view) | |
1262 | { | |
34483cac | 1263 | #ifdef CONFIG_TN3270_CONSOLE |
4b214a0c MS |
1264 | struct raw3270 *rp; |
1265 | ||
1266 | rp = view->dev; | |
1267 | if (rp && test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) | |
f10ccca7 | 1268 | ccw_device_force_console(rp->cdev); |
34483cac | 1269 | #endif |
4b214a0c MS |
1270 | } |
1271 | ||
1da177e4 LT |
1272 | static struct ccw_device_id raw3270_id[] = { |
1273 | { CCW_DEVICE(0x3270, 0) }, | |
1274 | { CCW_DEVICE(0x3271, 0) }, | |
1275 | { CCW_DEVICE(0x3272, 0) }, | |
1276 | { CCW_DEVICE(0x3273, 0) }, | |
1277 | { CCW_DEVICE(0x3274, 0) }, | |
1278 | { CCW_DEVICE(0x3275, 0) }, | |
1279 | { CCW_DEVICE(0x3276, 0) }, | |
1280 | { CCW_DEVICE(0x3277, 0) }, | |
1281 | { CCW_DEVICE(0x3278, 0) }, | |
1282 | { CCW_DEVICE(0x3279, 0) }, | |
1283 | { CCW_DEVICE(0x3174, 0) }, | |
1284 | { /* end of list */ }, | |
1285 | }; | |
1286 | ||
1287 | static struct ccw_driver raw3270_ccw_driver = { | |
3bda058b SO |
1288 | .driver = { |
1289 | .name = "3270", | |
1290 | .owner = THIS_MODULE, | |
1291 | }, | |
1da177e4 LT |
1292 | .ids = raw3270_id, |
1293 | .probe = &raw3270_probe, | |
1294 | .remove = &raw3270_remove, | |
1295 | .set_online = &raw3270_set_online, | |
1296 | .set_offline = &raw3270_set_offline, | |
4b214a0c MS |
1297 | .freeze = &raw3270_pm_stop, |
1298 | .thaw = &raw3270_pm_start, | |
1299 | .restore = &raw3270_pm_start, | |
420f42ec | 1300 | .int_class = IRQIO_C70, |
1da177e4 LT |
1301 | }; |
1302 | ||
1303 | static int | |
1304 | raw3270_init(void) | |
1305 | { | |
1306 | struct raw3270 *rp; | |
1307 | int rc; | |
1308 | ||
1309 | if (raw3270_registered) | |
1310 | return 0; | |
1311 | raw3270_registered = 1; | |
1312 | rc = ccw_driver_register(&raw3270_ccw_driver); | |
1313 | if (rc == 0) { | |
1314 | /* Create attributes for early (= console) device. */ | |
14cc3e2b | 1315 | mutex_lock(&raw3270_mutex); |
ed3cb6f0 | 1316 | class3270 = class_create(THIS_MODULE, "3270"); |
1da177e4 LT |
1317 | list_for_each_entry(rp, &raw3270_devices, list) { |
1318 | get_device(&rp->cdev->dev); | |
1319 | raw3270_create_attributes(rp); | |
1320 | } | |
14cc3e2b | 1321 | mutex_unlock(&raw3270_mutex); |
1da177e4 LT |
1322 | } |
1323 | return rc; | |
1324 | } | |
1325 | ||
1326 | static void | |
1327 | raw3270_exit(void) | |
1328 | { | |
1329 | ccw_driver_unregister(&raw3270_ccw_driver); | |
ed3cb6f0 | 1330 | class_destroy(class3270); |
1da177e4 LT |
1331 | } |
1332 | ||
1333 | MODULE_LICENSE("GPL"); | |
1334 | ||
1335 | module_init(raw3270_init); | |
1336 | module_exit(raw3270_exit); | |
1337 | ||
c95571e6 | 1338 | EXPORT_SYMBOL(class3270); |
1da177e4 LT |
1339 | EXPORT_SYMBOL(raw3270_request_alloc); |
1340 | EXPORT_SYMBOL(raw3270_request_free); | |
1341 | EXPORT_SYMBOL(raw3270_request_reset); | |
1342 | EXPORT_SYMBOL(raw3270_request_set_cmd); | |
1343 | EXPORT_SYMBOL(raw3270_request_add_data); | |
1344 | EXPORT_SYMBOL(raw3270_request_set_data); | |
1345 | EXPORT_SYMBOL(raw3270_request_set_idal); | |
1346 | EXPORT_SYMBOL(raw3270_buffer_address); | |
1347 | EXPORT_SYMBOL(raw3270_add_view); | |
1348 | EXPORT_SYMBOL(raw3270_del_view); | |
1349 | EXPORT_SYMBOL(raw3270_find_view); | |
1350 | EXPORT_SYMBOL(raw3270_activate_view); | |
1351 | EXPORT_SYMBOL(raw3270_deactivate_view); | |
1352 | EXPORT_SYMBOL(raw3270_start); | |
ed3cb6f0 | 1353 | EXPORT_SYMBOL(raw3270_start_locked); |
1da177e4 | 1354 | EXPORT_SYMBOL(raw3270_start_irq); |
ed3cb6f0 | 1355 | EXPORT_SYMBOL(raw3270_reset); |
1da177e4 LT |
1356 | EXPORT_SYMBOL(raw3270_register_notifier); |
1357 | EXPORT_SYMBOL(raw3270_unregister_notifier); | |
1358 | EXPORT_SYMBOL(raw3270_wait_queue); |