Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Martin Schwidefsky | 4b214a0 | 2009-06-16 10:30:47 +0200 | [diff] [blame] | 2 | * IBM/3270 Driver - core functions. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
Martin Schwidefsky | 4b214a0 | 2009-06-16 10:30:47 +0200 | [diff] [blame] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | */ |
| 9 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Michael Holzheu | 0a87c5c | 2007-08-22 13:51:40 +0200 | [diff] [blame] | 22 | #include <asm/diag.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | #include "raw3270.h" |
| 25 | |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 26 | #include <linux/major.h> |
| 27 | #include <linux/kdev_t.h> |
| 28 | #include <linux/device.h> |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 29 | #include <linux/mutex.h> |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 30 | |
Martin Schwidefsky | c95571e | 2013-01-08 15:31:11 +0100 | [diff] [blame] | 31 | struct class *class3270; |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 40 | unsigned int state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
Martin Schwidefsky | 132fab1 | 2006-06-29 14:57:39 +0200 | [diff] [blame] | 50 | |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 51 | struct raw3270_view init_view; |
| 52 | struct raw3270_request init_reset; |
| 53 | struct raw3270_request init_readpart; |
| 54 | struct raw3270_request init_readmod; |
Martin Schwidefsky | 132fab1 | 2006-06-29 14:57:39 +0200 | [diff] [blame] | 55 | unsigned char init_data[256]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | }; |
| 57 | |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | /* raw3270->flags */ |
| 66 | #define RAW3270_FLAGS_14BITADDR 0 /* 14-bit buffer addresses */ |
| 67 | #define RAW3270_FLAGS_BUSY 1 /* Device busy, leave it alone */ |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 68 | #define RAW3270_FLAGS_CONSOLE 2 /* Device is the console. */ |
| 69 | #define RAW3270_FLAGS_FROZEN 3 /* set if 3270 is frozen for suspend */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
| 71 | /* Semaphore to protect global data of raw3270 (devices, views, etc). */ |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 72 | static DEFINE_MUTEX(raw3270_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
| 74 | /* List of 3270 devices. */ |
Denis Cheng | c11ca97 | 2008-01-26 14:11:13 +0100 | [diff] [blame] | 75 | static LIST_HEAD(raw3270_devices); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 85 | static bool tubxcorrect = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Heiko Carstens | 2b67fc4 | 2007-02-05 21:16:47 +0100 | [diff] [blame] | 96 | static unsigned char raw3270_ebcgraf[64] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
Eric Sesterhenn | 88abaab | 2006-03-24 03:15:31 -0800 | [diff] [blame] | 139 | rq = kzalloc(sizeof(struct raw3270_request), GFP_KERNEL | GFP_DMA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | if (!rq) |
| 141 | return ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | /* |
| 164 | * Free 3270 ccw request |
| 165 | */ |
| 166 | void |
| 167 | raw3270_request_free (struct raw3270_request *rq) |
| 168 | { |
Jesper Juhl | 17fd682 | 2005-11-07 01:01:30 -0800 | [diff] [blame] | 169 | kfree(rq->buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 235 | __raw3270_halt_io(struct raw3270 *rp, struct raw3270_request *rq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Martin Schwidefsky | 4b214a0 | 2009-06-16 10:30:47 +0200 | [diff] [blame] | 287 | if (!rp || rp->view != view || |
| 288 | test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | rc = -EACCES; |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 290 | else if (!raw3270_state_ready(rp)) |
| 291 | rc = -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 298 | int |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 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; |
Martin Schwidefsky | 4b214a0 | 2009-06-16 10:30:47 +0200 | [diff] [blame] | 305 | if (!rp || rp->view != view || |
| 306 | test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 307 | rc = -EACCES; |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 308 | else if (!raw3270_state_ready(rp)) |
| 309 | rc = -EBUSY; |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 310 | else |
| 311 | rc = __raw3270_start(rp, view, rq); |
| 312 | return rc; |
| 313 | } |
| 314 | |
| 315 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Greg Kroah-Hartman | dff59b6 | 2009-05-04 12:40:54 -0700 | [diff] [blame] | 338 | rp = dev_get_drvdata(&cdev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Peter Oberparleiter | 23d805b6 | 2008-07-14 09:58:50 +0200 | [diff] [blame] | 346 | else if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | rq->rc = -EIO; |
| 348 | rc = RAW3270_IO_DONE; |
Peter Oberparleiter | 23d805b6 | 2008-07-14 09:58:50 +0200 | [diff] [blame] | 349 | } else if (irb->scsw.cmd.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END | |
| 350 | DEV_STAT_UNIT_EXCEP)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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. */ |
Peter Oberparleiter | 23d805b6 | 2008-07-14 09:58:50 +0200 | [diff] [blame] | 356 | if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) |
Daniel Mack | 3ad2f3fb | 2010-02-03 08:01:28 +0800 | [diff] [blame] | 382 | return; /* Successfully restarted. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | break; |
| 384 | case RAW3270_IO_STOP: |
| 385 | if (!rq) |
| 386 | break; |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 387 | __raw3270_halt_io(rp, rq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | /* |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 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'). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | static void |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 466 | raw3270_size_device_vm(struct raw3270 *rp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | { |
| 468 | int rc, model; |
Cornelia Huck | 9a92fe4 | 2007-05-10 15:45:42 +0200 | [diff] [blame] | 469 | struct ccw_dev_id dev_id; |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 470 | struct diag210 diag_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | |
Cornelia Huck | 9a92fe4 | 2007-05-10 15:45:42 +0200 | [diff] [blame] | 472 | ccw_device_get_id(rp->cdev, &dev_id); |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | } |
| 503 | |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 504 | static void |
| 505 | raw3270_size_device(struct raw3270 *rp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | struct raw3270_ua *uap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | /* Got a Query Reply */ |
Martin Schwidefsky | 132fab1 | 2006-06-29 14:57:39 +0200 | [diff] [blame] | 510 | uap = (struct raw3270_ua *) (rp->init_data + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | /* Paranoia check. */ |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 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; |
| 542 | } |
| 543 | |
| 544 | static void |
| 545 | raw3270_size_device_done(struct raw3270 *rp) |
| 546 | { |
| 547 | struct raw3270_view *view; |
| 548 | |
| 549 | rp->view = NULL; |
| 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; |
| 561 | } |
| 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; |
| 618 | if (rq && rq->rc) { |
| 619 | /* Reset command failed. */ |
| 620 | rp->state = RAW3270_STATE_INIT; |
| 621 | } else if (0 && MACHINE_IS_VM) { |
| 622 | raw3270_size_device_vm(rp); |
| 623 | raw3270_size_device_done(rp); |
| 624 | } else |
| 625 | raw3270_writesf_readpart(rp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | } |
| 627 | |
| 628 | static int |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 629 | __raw3270_reset_device(struct raw3270 *rp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | { |
| 631 | int rc; |
| 632 | |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 633 | /* Store reset data stream to init_data/init_reset */ |
| 634 | memset(&rp->init_reset, 0, sizeof(rp->init_reset)); |
| 635 | memset(&rp->init_data, 0, sizeof(rp->init_data)); |
| 636 | rp->init_data[0] = TW_KR; |
| 637 | rp->init_reset.ccw.cmd_code = TC_EWRITEA; |
| 638 | rp->init_reset.ccw.flags = CCW_FLAG_SLI; |
| 639 | rp->init_reset.ccw.count = 1; |
| 640 | rp->init_reset.ccw.cda = (__u32) __pa(rp->init_data); |
| 641 | rp->init_reset.callback = raw3270_reset_device_cb; |
| 642 | rc = __raw3270_start(rp, &rp->init_view, &rp->init_reset); |
| 643 | if (rc == 0 && rp->state == RAW3270_STATE_INIT) |
| 644 | rp->state = RAW3270_STATE_RESET; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | return rc; |
| 646 | } |
| 647 | |
| 648 | static int |
| 649 | raw3270_reset_device(struct raw3270 *rp) |
| 650 | { |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 651 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | int rc; |
| 653 | |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | return rc; |
| 658 | } |
| 659 | |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 660 | int |
| 661 | raw3270_reset(struct raw3270_view *view) |
| 662 | { |
| 663 | struct raw3270 *rp; |
| 664 | int rc; |
| 665 | |
| 666 | rp = view->dev; |
Martin Schwidefsky | 4b214a0 | 2009-06-16 10:30:47 +0200 | [diff] [blame] | 667 | if (!rp || rp->view != view || |
| 668 | test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 669 | rc = -EACCES; |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 670 | else if (!raw3270_state_ready(rp)) |
| 671 | rc = -EBUSY; |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 672 | else |
| 673 | rc = raw3270_reset_device(view->dev); |
| 674 | return rc; |
| 675 | } |
| 676 | |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 742 | rp->init_view.dev = rp; |
| 743 | rp->init_view.fn = &raw3270_init_fn; |
| 744 | rp->view = &rp->init_view; |
| 745 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | /* |
| 747 | * Add device to list and find the smallest unused minor |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 748 | * number for it. Note: there is no device with minor 0, |
| 749 | * see special case for fs3270.c:fs3270_open(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | */ |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 751 | mutex_lock(&raw3270_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | /* Keep the list sorted. */ |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 753 | minor = RAW3270_FIRSTMINOR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 764 | if (rp->minor == -1 && minor < RAW3270_MAXDEVS + RAW3270_FIRSTMINOR) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | rp->minor = minor; |
| 766 | list_add_tail(&rp->list, &raw3270_devices); |
| 767 | } |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 768 | mutex_unlock(&raw3270_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | /* No free minor number? Then give up. */ |
| 770 | if (rp->minor == -1) |
| 771 | return -EUSERS; |
| 772 | rp->cdev = cdev; |
Greg Kroah-Hartman | dff59b6 | 2009-05-04 12:40:54 -0700 | [diff] [blame] | 773 | dev_set_drvdata(&cdev->dev, rp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | cdev->handler = raw3270_irq; |
| 775 | return 0; |
| 776 | } |
| 777 | |
| 778 | #ifdef CONFIG_TN3270_CONSOLE |
| 779 | /* |
| 780 | * Setup 3270 device configured as console. |
| 781 | */ |
Heiko Carstens | e62133b | 2007-07-27 12:29:13 +0200 | [diff] [blame] | 782 | struct raw3270 __init *raw3270_setup_console(struct ccw_device *cdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | { |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 784 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | struct raw3270 *rp; |
| 786 | char *ascebc; |
| 787 | int rc; |
| 788 | |
Heiko Carstens | 33403dc | 2009-06-22 12:08:05 +0200 | [diff] [blame] | 789 | rp = kzalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); |
| 790 | ascebc = kzalloc(256, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | rc = raw3270_setup_device(cdev, rp, ascebc); |
| 792 | if (rc) |
| 793 | return ERR_PTR(rc); |
| 794 | set_bit(RAW3270_FLAGS_CONSOLE, &rp->flags); |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 795 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); |
| 796 | do { |
| 797 | __raw3270_reset_device(rp); |
| 798 | while (!raw3270_state_final(rp)) { |
Sebastian Ott | 188561a | 2013-04-13 12:53:21 +0200 | [diff] [blame] | 799 | ccw_device_wait_idle(rp->cdev); |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 800 | barrier(); |
| 801 | } |
| 802 | } while (rp->state != RAW3270_STATE_READY); |
| 803 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | return rp; |
| 805 | } |
| 806 | |
| 807 | void |
| 808 | raw3270_wait_cons_dev(struct raw3270 *rp) |
| 809 | { |
| 810 | unsigned long flags; |
| 811 | |
| 812 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); |
Sebastian Ott | 188561a | 2013-04-13 12:53:21 +0200 | [diff] [blame] | 813 | ccw_device_wait_idle(rp->cdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); |
| 815 | } |
| 816 | |
| 817 | #endif |
| 818 | |
| 819 | /* |
| 820 | * Create a 3270 device structure. |
| 821 | */ |
| 822 | static struct raw3270 * |
| 823 | raw3270_create_device(struct ccw_device *cdev) |
| 824 | { |
| 825 | struct raw3270 *rp; |
| 826 | char *ascebc; |
| 827 | int rc; |
| 828 | |
Martin Schwidefsky | 132fab1 | 2006-06-29 14:57:39 +0200 | [diff] [blame] | 829 | rp = kmalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | if (!rp) |
| 831 | return ERR_PTR(-ENOMEM); |
| 832 | ascebc = kmalloc(256, GFP_KERNEL); |
| 833 | if (!ascebc) { |
| 834 | kfree(rp); |
| 835 | return ERR_PTR(-ENOMEM); |
| 836 | } |
| 837 | rc = raw3270_setup_device(cdev, rp, ascebc); |
| 838 | if (rc) { |
| 839 | kfree(rp->ascebc); |
| 840 | kfree(rp); |
| 841 | rp = ERR_PTR(rc); |
| 842 | } |
| 843 | /* Get reference to ccw_device structure. */ |
| 844 | get_device(&cdev->dev); |
| 845 | return rp; |
| 846 | } |
| 847 | |
| 848 | /* |
| 849 | * Activate a view. |
| 850 | */ |
| 851 | int |
| 852 | raw3270_activate_view(struct raw3270_view *view) |
| 853 | { |
| 854 | struct raw3270 *rp; |
| 855 | struct raw3270_view *oldview, *nv; |
| 856 | unsigned long flags; |
| 857 | int rc; |
| 858 | |
| 859 | rp = view->dev; |
| 860 | if (!rp) |
| 861 | return -ENODEV; |
| 862 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); |
| 863 | if (rp->view == view) |
| 864 | rc = 0; |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 865 | else if (!raw3270_state_ready(rp)) |
| 866 | rc = -EBUSY; |
Martin Schwidefsky | 4b214a0 | 2009-06-16 10:30:47 +0200 | [diff] [blame] | 867 | else if (test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) |
| 868 | rc = -EACCES; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | else { |
Heiko Carstens | d2c993d | 2006-07-12 16:41:55 +0200 | [diff] [blame] | 870 | oldview = NULL; |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 871 | if (rp->view && rp->view->fn->deactivate) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | oldview = rp->view; |
| 873 | oldview->fn->deactivate(oldview); |
| 874 | } |
| 875 | rp->view = view; |
| 876 | rc = view->fn->activate(view); |
| 877 | if (rc) { |
| 878 | /* Didn't work. Try to reactivate the old view. */ |
| 879 | rp->view = oldview; |
| 880 | if (!oldview || oldview->fn->activate(oldview) != 0) { |
| 881 | /* Didn't work as well. Try any other view. */ |
| 882 | list_for_each_entry(nv, &rp->view_list, list) |
| 883 | if (nv != view && nv != oldview) { |
| 884 | rp->view = nv; |
| 885 | if (nv->fn->activate(nv) == 0) |
| 886 | break; |
Heiko Carstens | d2c993d | 2006-07-12 16:41:55 +0200 | [diff] [blame] | 887 | rp->view = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | } |
| 889 | } |
| 890 | } |
| 891 | } |
| 892 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); |
| 893 | return rc; |
| 894 | } |
| 895 | |
| 896 | /* |
| 897 | * Deactivate current view. |
| 898 | */ |
| 899 | void |
| 900 | raw3270_deactivate_view(struct raw3270_view *view) |
| 901 | { |
| 902 | unsigned long flags; |
| 903 | struct raw3270 *rp; |
| 904 | |
| 905 | rp = view->dev; |
| 906 | if (!rp) |
| 907 | return; |
| 908 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); |
| 909 | if (rp->view == view) { |
| 910 | view->fn->deactivate(view); |
Heiko Carstens | d2c993d | 2006-07-12 16:41:55 +0200 | [diff] [blame] | 911 | rp->view = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | /* Move deactivated view to end of list. */ |
| 913 | list_del_init(&view->list); |
| 914 | list_add_tail(&view->list, &rp->view_list); |
| 915 | /* Try to activate another view. */ |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 916 | if (raw3270_state_ready(rp) && |
Martin Schwidefsky | 4b214a0 | 2009-06-16 10:30:47 +0200 | [diff] [blame] | 917 | !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) { |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 918 | list_for_each_entry(view, &rp->view_list, list) { |
| 919 | rp->view = view; |
| 920 | if (view->fn->activate(view) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | break; |
Heiko Carstens | d2c993d | 2006-07-12 16:41:55 +0200 | [diff] [blame] | 922 | rp->view = NULL; |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 923 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | } |
| 925 | } |
| 926 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); |
| 927 | } |
| 928 | |
| 929 | /* |
| 930 | * Add view to device with minor "minor". |
| 931 | */ |
| 932 | int |
| 933 | raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn, int minor) |
| 934 | { |
| 935 | unsigned long flags; |
| 936 | struct raw3270 *rp; |
| 937 | int rc; |
| 938 | |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 939 | if (minor <= 0) |
| 940 | return -ENODEV; |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 941 | mutex_lock(&raw3270_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | rc = -ENODEV; |
| 943 | list_for_each_entry(rp, &raw3270_devices, list) { |
| 944 | if (rp->minor != minor) |
| 945 | continue; |
| 946 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 947 | atomic_set(&view->ref_count, 2); |
| 948 | view->dev = rp; |
| 949 | view->fn = fn; |
| 950 | view->model = rp->model; |
| 951 | view->rows = rp->rows; |
| 952 | view->cols = rp->cols; |
| 953 | view->ascebc = rp->ascebc; |
| 954 | spin_lock_init(&view->lock); |
| 955 | list_add(&view->list, &rp->view_list); |
| 956 | rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); |
| 958 | break; |
| 959 | } |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 960 | mutex_unlock(&raw3270_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | return rc; |
| 962 | } |
| 963 | |
| 964 | /* |
| 965 | * Find specific view of device with minor "minor". |
| 966 | */ |
| 967 | struct raw3270_view * |
| 968 | raw3270_find_view(struct raw3270_fn *fn, int minor) |
| 969 | { |
| 970 | struct raw3270 *rp; |
| 971 | struct raw3270_view *view, *tmp; |
| 972 | unsigned long flags; |
| 973 | |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 974 | mutex_lock(&raw3270_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | view = ERR_PTR(-ENODEV); |
| 976 | list_for_each_entry(rp, &raw3270_devices, list) { |
| 977 | if (rp->minor != minor) |
| 978 | continue; |
| 979 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 980 | list_for_each_entry(tmp, &rp->view_list, list) { |
| 981 | if (tmp->fn == fn) { |
| 982 | raw3270_get_view(tmp); |
| 983 | view = tmp; |
| 984 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | } |
| 986 | } |
| 987 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); |
| 988 | break; |
| 989 | } |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 990 | mutex_unlock(&raw3270_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | return view; |
| 992 | } |
| 993 | |
| 994 | /* |
| 995 | * Remove view from device and free view structure via call to view->fn->free. |
| 996 | */ |
| 997 | void |
| 998 | raw3270_del_view(struct raw3270_view *view) |
| 999 | { |
| 1000 | unsigned long flags; |
| 1001 | struct raw3270 *rp; |
| 1002 | struct raw3270_view *nv; |
| 1003 | |
| 1004 | rp = view->dev; |
| 1005 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); |
| 1006 | if (rp->view == view) { |
| 1007 | view->fn->deactivate(view); |
Heiko Carstens | d2c993d | 2006-07-12 16:41:55 +0200 | [diff] [blame] | 1008 | rp->view = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | } |
| 1010 | list_del_init(&view->list); |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 1011 | if (!rp->view && raw3270_state_ready(rp) && |
Martin Schwidefsky | 4b214a0 | 2009-06-16 10:30:47 +0200 | [diff] [blame] | 1012 | !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | /* Try to activate another view. */ |
| 1014 | list_for_each_entry(nv, &rp->view_list, list) { |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 1015 | if (nv->fn->activate(nv) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | rp->view = nv; |
| 1017 | break; |
| 1018 | } |
| 1019 | } |
| 1020 | } |
| 1021 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); |
| 1022 | /* Wait for reference counter to drop to zero. */ |
| 1023 | atomic_dec(&view->ref_count); |
| 1024 | wait_event(raw3270_wait_queue, atomic_read(&view->ref_count) == 0); |
| 1025 | if (view->fn->free) |
| 1026 | view->fn->free(view); |
| 1027 | } |
| 1028 | |
| 1029 | /* |
| 1030 | * Remove a 3270 device structure. |
| 1031 | */ |
| 1032 | static void |
| 1033 | raw3270_delete_device(struct raw3270 *rp) |
| 1034 | { |
| 1035 | struct ccw_device *cdev; |
| 1036 | |
| 1037 | /* Remove from device chain. */ |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 1038 | mutex_lock(&raw3270_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | list_del_init(&rp->list); |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 1040 | mutex_unlock(&raw3270_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | |
| 1042 | /* Disconnect from ccw_device. */ |
| 1043 | cdev = rp->cdev; |
Heiko Carstens | d2c993d | 2006-07-12 16:41:55 +0200 | [diff] [blame] | 1044 | rp->cdev = NULL; |
Greg Kroah-Hartman | dff59b6 | 2009-05-04 12:40:54 -0700 | [diff] [blame] | 1045 | dev_set_drvdata(&cdev->dev, NULL); |
Heiko Carstens | d2c993d | 2006-07-12 16:41:55 +0200 | [diff] [blame] | 1046 | cdev->handler = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | |
| 1048 | /* Put ccw_device structure. */ |
| 1049 | put_device(&cdev->dev); |
| 1050 | |
| 1051 | /* Now free raw3270 structure. */ |
| 1052 | kfree(rp->ascebc); |
| 1053 | kfree(rp); |
| 1054 | } |
| 1055 | |
| 1056 | static int |
| 1057 | raw3270_probe (struct ccw_device *cdev) |
| 1058 | { |
| 1059 | return 0; |
| 1060 | } |
| 1061 | |
| 1062 | /* |
| 1063 | * Additional attributes for a 3270 device |
| 1064 | */ |
| 1065 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1066 | raw3270_model_show(struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | { |
| 1068 | return snprintf(buf, PAGE_SIZE, "%i\n", |
Greg Kroah-Hartman | dff59b6 | 2009-05-04 12:40:54 -0700 | [diff] [blame] | 1069 | ((struct raw3270 *) dev_get_drvdata(dev))->model); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | } |
Heiko Carstens | d2c993d | 2006-07-12 16:41:55 +0200 | [diff] [blame] | 1071 | static DEVICE_ATTR(model, 0444, raw3270_model_show, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | |
| 1073 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1074 | raw3270_rows_show(struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | { |
| 1076 | return snprintf(buf, PAGE_SIZE, "%i\n", |
Greg Kroah-Hartman | dff59b6 | 2009-05-04 12:40:54 -0700 | [diff] [blame] | 1077 | ((struct raw3270 *) dev_get_drvdata(dev))->rows); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | } |
Heiko Carstens | d2c993d | 2006-07-12 16:41:55 +0200 | [diff] [blame] | 1079 | static DEVICE_ATTR(rows, 0444, raw3270_rows_show, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | |
| 1081 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1082 | raw3270_columns_show(struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | { |
| 1084 | return snprintf(buf, PAGE_SIZE, "%i\n", |
Greg Kroah-Hartman | dff59b6 | 2009-05-04 12:40:54 -0700 | [diff] [blame] | 1085 | ((struct raw3270 *) dev_get_drvdata(dev))->cols); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | } |
Heiko Carstens | d2c993d | 2006-07-12 16:41:55 +0200 | [diff] [blame] | 1087 | static DEVICE_ATTR(columns, 0444, raw3270_columns_show, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | |
| 1089 | static struct attribute * raw3270_attrs[] = { |
| 1090 | &dev_attr_model.attr, |
| 1091 | &dev_attr_rows.attr, |
| 1092 | &dev_attr_columns.attr, |
| 1093 | NULL, |
| 1094 | }; |
| 1095 | |
| 1096 | static struct attribute_group raw3270_attr_group = { |
| 1097 | .attrs = raw3270_attrs, |
| 1098 | }; |
| 1099 | |
Heiko Carstens | d7cf0d5 | 2006-07-18 13:46:58 +0200 | [diff] [blame] | 1100 | static int raw3270_create_attributes(struct raw3270 *rp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | { |
Martin Schwidefsky | c95571e | 2013-01-08 15:31:11 +0100 | [diff] [blame] | 1102 | return sysfs_create_group(&rp->cdev->dev.kobj, &raw3270_attr_group); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | } |
| 1104 | |
| 1105 | /* |
| 1106 | * Notifier for device addition/removal |
| 1107 | */ |
Denis Cheng | c11ca97 | 2008-01-26 14:11:13 +0100 | [diff] [blame] | 1108 | static LIST_HEAD(raw3270_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | |
Martin Schwidefsky | c95571e | 2013-01-08 15:31:11 +0100 | [diff] [blame] | 1110 | int raw3270_register_notifier(struct raw3270_notifier *notifier) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | struct raw3270 *rp; |
| 1113 | |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 1114 | mutex_lock(&raw3270_mutex); |
Martin Schwidefsky | c95571e | 2013-01-08 15:31:11 +0100 | [diff] [blame] | 1115 | list_add_tail(¬ifier->list, &raw3270_notifier); |
| 1116 | list_for_each_entry(rp, &raw3270_devices, list) |
| 1117 | notifier->create(rp->minor); |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 1118 | mutex_unlock(&raw3270_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | return 0; |
| 1120 | } |
| 1121 | |
Martin Schwidefsky | c95571e | 2013-01-08 15:31:11 +0100 | [diff] [blame] | 1122 | void raw3270_unregister_notifier(struct raw3270_notifier *notifier) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | { |
Martin Schwidefsky | c95571e | 2013-01-08 15:31:11 +0100 | [diff] [blame] | 1124 | struct raw3270 *rp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 1126 | mutex_lock(&raw3270_mutex); |
Martin Schwidefsky | c95571e | 2013-01-08 15:31:11 +0100 | [diff] [blame] | 1127 | list_for_each_entry(rp, &raw3270_devices, list) |
| 1128 | notifier->destroy(rp->minor); |
| 1129 | list_del(¬ifier->list); |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 1130 | mutex_unlock(&raw3270_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | } |
| 1132 | |
| 1133 | /* |
| 1134 | * Set 3270 device online. |
| 1135 | */ |
| 1136 | static int |
| 1137 | raw3270_set_online (struct ccw_device *cdev) |
| 1138 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | struct raw3270_notifier *np; |
Martin Schwidefsky | c95571e | 2013-01-08 15:31:11 +0100 | [diff] [blame] | 1140 | struct raw3270 *rp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | int rc; |
| 1142 | |
| 1143 | rp = raw3270_create_device(cdev); |
| 1144 | if (IS_ERR(rp)) |
| 1145 | return PTR_ERR(rp); |
Heiko Carstens | d7cf0d5 | 2006-07-18 13:46:58 +0200 | [diff] [blame] | 1146 | rc = raw3270_create_attributes(rp); |
| 1147 | if (rc) |
| 1148 | goto failure; |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 1149 | raw3270_reset_device(rp); |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 1150 | mutex_lock(&raw3270_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | list_for_each_entry(np, &raw3270_notifier, list) |
Martin Schwidefsky | c95571e | 2013-01-08 15:31:11 +0100 | [diff] [blame] | 1152 | np->create(rp->minor); |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 1153 | mutex_unlock(&raw3270_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | return 0; |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 1155 | |
| 1156 | failure: |
| 1157 | raw3270_delete_device(rp); |
| 1158 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | } |
| 1160 | |
| 1161 | /* |
| 1162 | * Remove 3270 device structure. |
| 1163 | */ |
| 1164 | static void |
| 1165 | raw3270_remove (struct ccw_device *cdev) |
| 1166 | { |
| 1167 | unsigned long flags; |
| 1168 | struct raw3270 *rp; |
| 1169 | struct raw3270_view *v; |
| 1170 | struct raw3270_notifier *np; |
| 1171 | |
Greg Kroah-Hartman | dff59b6 | 2009-05-04 12:40:54 -0700 | [diff] [blame] | 1172 | rp = dev_get_drvdata(&cdev->dev); |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 1173 | /* |
| 1174 | * _remove is the opposite of _probe; it's probe that |
| 1175 | * should set up rp. raw3270_remove gets entered for |
| 1176 | * devices even if they haven't been varied online. |
| 1177 | * Thus, rp may validly be NULL here. |
| 1178 | */ |
| 1179 | if (rp == NULL) |
| 1180 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | |
| 1182 | sysfs_remove_group(&cdev->dev.kobj, &raw3270_attr_group); |
| 1183 | |
| 1184 | /* Deactivate current view and remove all views. */ |
| 1185 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); |
| 1186 | if (rp->view) { |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 1187 | if (rp->view->fn->deactivate) |
| 1188 | rp->view->fn->deactivate(rp->view); |
Heiko Carstens | d2c993d | 2006-07-12 16:41:55 +0200 | [diff] [blame] | 1189 | rp->view = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | } |
| 1191 | while (!list_empty(&rp->view_list)) { |
| 1192 | v = list_entry(rp->view_list.next, struct raw3270_view, list); |
| 1193 | if (v->fn->release) |
| 1194 | v->fn->release(v); |
| 1195 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); |
| 1196 | raw3270_del_view(v); |
| 1197 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); |
| 1198 | } |
| 1199 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); |
| 1200 | |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 1201 | mutex_lock(&raw3270_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | list_for_each_entry(np, &raw3270_notifier, list) |
Martin Schwidefsky | c95571e | 2013-01-08 15:31:11 +0100 | [diff] [blame] | 1203 | np->destroy(rp->minor); |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 1204 | mutex_unlock(&raw3270_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | |
| 1206 | /* Reset 3270 device. */ |
| 1207 | raw3270_reset_device(rp); |
| 1208 | /* And finally remove it. */ |
| 1209 | raw3270_delete_device(rp); |
| 1210 | } |
| 1211 | |
| 1212 | /* |
| 1213 | * Set 3270 device offline. |
| 1214 | */ |
| 1215 | static int |
| 1216 | raw3270_set_offline (struct ccw_device *cdev) |
| 1217 | { |
| 1218 | struct raw3270 *rp; |
| 1219 | |
Greg Kroah-Hartman | dff59b6 | 2009-05-04 12:40:54 -0700 | [diff] [blame] | 1220 | rp = dev_get_drvdata(&cdev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | if (test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) |
| 1222 | return -EBUSY; |
| 1223 | raw3270_remove(cdev); |
| 1224 | return 0; |
| 1225 | } |
| 1226 | |
Martin Schwidefsky | 4b214a0 | 2009-06-16 10:30:47 +0200 | [diff] [blame] | 1227 | static int raw3270_pm_stop(struct ccw_device *cdev) |
| 1228 | { |
| 1229 | struct raw3270 *rp; |
| 1230 | struct raw3270_view *view; |
| 1231 | unsigned long flags; |
| 1232 | |
Martin Schwidefsky | 4f0076f | 2009-06-22 12:08:19 +0200 | [diff] [blame] | 1233 | rp = dev_get_drvdata(&cdev->dev); |
Martin Schwidefsky | 4b214a0 | 2009-06-16 10:30:47 +0200 | [diff] [blame] | 1234 | if (!rp) |
| 1235 | return 0; |
| 1236 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 1237 | if (rp->view && rp->view->fn->deactivate) |
Martin Schwidefsky | 4b214a0 | 2009-06-16 10:30:47 +0200 | [diff] [blame] | 1238 | rp->view->fn->deactivate(rp->view); |
| 1239 | if (!test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) { |
| 1240 | /* |
| 1241 | * Release tty and fullscreen for all non-console |
| 1242 | * devices. |
| 1243 | */ |
| 1244 | list_for_each_entry(view, &rp->view_list, list) { |
| 1245 | if (view->fn->release) |
| 1246 | view->fn->release(view); |
| 1247 | } |
| 1248 | } |
| 1249 | set_bit(RAW3270_FLAGS_FROZEN, &rp->flags); |
| 1250 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); |
| 1251 | return 0; |
| 1252 | } |
| 1253 | |
| 1254 | static int raw3270_pm_start(struct ccw_device *cdev) |
| 1255 | { |
| 1256 | struct raw3270 *rp; |
| 1257 | unsigned long flags; |
| 1258 | |
Martin Schwidefsky | 4f0076f | 2009-06-22 12:08:19 +0200 | [diff] [blame] | 1259 | rp = dev_get_drvdata(&cdev->dev); |
Martin Schwidefsky | 4b214a0 | 2009-06-16 10:30:47 +0200 | [diff] [blame] | 1260 | if (!rp) |
| 1261 | return 0; |
| 1262 | spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); |
| 1263 | clear_bit(RAW3270_FLAGS_FROZEN, &rp->flags); |
Martin Schwidefsky | 4d334fd | 2013-01-04 14:55:13 +0100 | [diff] [blame] | 1264 | if (rp->view && rp->view->fn->activate) |
Martin Schwidefsky | 4b214a0 | 2009-06-16 10:30:47 +0200 | [diff] [blame] | 1265 | rp->view->fn->activate(rp->view); |
| 1266 | spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); |
| 1267 | return 0; |
| 1268 | } |
| 1269 | |
| 1270 | void raw3270_pm_unfreeze(struct raw3270_view *view) |
| 1271 | { |
Sebastian Ott | 34483ca | 2009-10-06 10:33:56 +0200 | [diff] [blame] | 1272 | #ifdef CONFIG_TN3270_CONSOLE |
Martin Schwidefsky | 4b214a0 | 2009-06-16 10:30:47 +0200 | [diff] [blame] | 1273 | struct raw3270 *rp; |
| 1274 | |
| 1275 | rp = view->dev; |
| 1276 | if (rp && test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) |
Sebastian Ott | f10ccca | 2013-04-13 12:56:51 +0200 | [diff] [blame] | 1277 | ccw_device_force_console(rp->cdev); |
Sebastian Ott | 34483ca | 2009-10-06 10:33:56 +0200 | [diff] [blame] | 1278 | #endif |
Martin Schwidefsky | 4b214a0 | 2009-06-16 10:30:47 +0200 | [diff] [blame] | 1279 | } |
| 1280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | static struct ccw_device_id raw3270_id[] = { |
| 1282 | { CCW_DEVICE(0x3270, 0) }, |
| 1283 | { CCW_DEVICE(0x3271, 0) }, |
| 1284 | { CCW_DEVICE(0x3272, 0) }, |
| 1285 | { CCW_DEVICE(0x3273, 0) }, |
| 1286 | { CCW_DEVICE(0x3274, 0) }, |
| 1287 | { CCW_DEVICE(0x3275, 0) }, |
| 1288 | { CCW_DEVICE(0x3276, 0) }, |
| 1289 | { CCW_DEVICE(0x3277, 0) }, |
| 1290 | { CCW_DEVICE(0x3278, 0) }, |
| 1291 | { CCW_DEVICE(0x3279, 0) }, |
| 1292 | { CCW_DEVICE(0x3174, 0) }, |
| 1293 | { /* end of list */ }, |
| 1294 | }; |
| 1295 | |
| 1296 | static struct ccw_driver raw3270_ccw_driver = { |
Sebastian Ott | 3bda058 | 2011-03-23 10:16:02 +0100 | [diff] [blame] | 1297 | .driver = { |
| 1298 | .name = "3270", |
| 1299 | .owner = THIS_MODULE, |
| 1300 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | .ids = raw3270_id, |
| 1302 | .probe = &raw3270_probe, |
| 1303 | .remove = &raw3270_remove, |
| 1304 | .set_online = &raw3270_set_online, |
| 1305 | .set_offline = &raw3270_set_offline, |
Martin Schwidefsky | 4b214a0 | 2009-06-16 10:30:47 +0200 | [diff] [blame] | 1306 | .freeze = &raw3270_pm_stop, |
| 1307 | .thaw = &raw3270_pm_start, |
| 1308 | .restore = &raw3270_pm_start, |
Heiko Carstens | 420f42e | 2013-01-02 15:18:18 +0100 | [diff] [blame] | 1309 | .int_class = IRQIO_C70, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | }; |
| 1311 | |
| 1312 | static int |
| 1313 | raw3270_init(void) |
| 1314 | { |
| 1315 | struct raw3270 *rp; |
| 1316 | int rc; |
| 1317 | |
| 1318 | if (raw3270_registered) |
| 1319 | return 0; |
| 1320 | raw3270_registered = 1; |
| 1321 | rc = ccw_driver_register(&raw3270_ccw_driver); |
| 1322 | if (rc == 0) { |
| 1323 | /* Create attributes for early (= console) device. */ |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 1324 | mutex_lock(&raw3270_mutex); |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 1325 | class3270 = class_create(THIS_MODULE, "3270"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | list_for_each_entry(rp, &raw3270_devices, list) { |
| 1327 | get_device(&rp->cdev->dev); |
| 1328 | raw3270_create_attributes(rp); |
| 1329 | } |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 1330 | mutex_unlock(&raw3270_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | } |
| 1332 | return rc; |
| 1333 | } |
| 1334 | |
| 1335 | static void |
| 1336 | raw3270_exit(void) |
| 1337 | { |
| 1338 | ccw_driver_unregister(&raw3270_ccw_driver); |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 1339 | class_destroy(class3270); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | } |
| 1341 | |
| 1342 | MODULE_LICENSE("GPL"); |
| 1343 | |
| 1344 | module_init(raw3270_init); |
| 1345 | module_exit(raw3270_exit); |
| 1346 | |
Martin Schwidefsky | c95571e | 2013-01-08 15:31:11 +0100 | [diff] [blame] | 1347 | EXPORT_SYMBOL(class3270); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | EXPORT_SYMBOL(raw3270_request_alloc); |
| 1349 | EXPORT_SYMBOL(raw3270_request_free); |
| 1350 | EXPORT_SYMBOL(raw3270_request_reset); |
| 1351 | EXPORT_SYMBOL(raw3270_request_set_cmd); |
| 1352 | EXPORT_SYMBOL(raw3270_request_add_data); |
| 1353 | EXPORT_SYMBOL(raw3270_request_set_data); |
| 1354 | EXPORT_SYMBOL(raw3270_request_set_idal); |
| 1355 | EXPORT_SYMBOL(raw3270_buffer_address); |
| 1356 | EXPORT_SYMBOL(raw3270_add_view); |
| 1357 | EXPORT_SYMBOL(raw3270_del_view); |
| 1358 | EXPORT_SYMBOL(raw3270_find_view); |
| 1359 | EXPORT_SYMBOL(raw3270_activate_view); |
| 1360 | EXPORT_SYMBOL(raw3270_deactivate_view); |
| 1361 | EXPORT_SYMBOL(raw3270_start); |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 1362 | EXPORT_SYMBOL(raw3270_start_locked); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | EXPORT_SYMBOL(raw3270_start_irq); |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 1364 | EXPORT_SYMBOL(raw3270_reset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | EXPORT_SYMBOL(raw3270_register_notifier); |
| 1366 | EXPORT_SYMBOL(raw3270_unregister_notifier); |
| 1367 | EXPORT_SYMBOL(raw3270_wait_queue); |