| 1 | /* |
| 2 | * Copyright 2003 Digi International (www.digi.com) |
| 3 | * Scott H Kilau <Scott_Kilau at digi dot com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2, or (at your option) |
| 8 | * any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the |
| 12 | * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
| 13 | * PURPOSE. See the GNU General Public License for more details. |
| 14 | */ |
| 15 | |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/pci.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/sched.h> |
| 21 | #include "dgnc_driver.h" |
| 22 | #include "dgnc_pci.h" |
| 23 | #include "dgnc_mgmt.h" |
| 24 | #include "dgnc_tty.h" |
| 25 | #include "dgnc_cls.h" |
| 26 | #include "dgnc_neo.h" |
| 27 | #include "dgnc_sysfs.h" |
| 28 | |
| 29 | MODULE_LICENSE("GPL"); |
| 30 | MODULE_AUTHOR("Digi International, http://www.digi.com"); |
| 31 | MODULE_DESCRIPTION("Driver for the Digi International Neo and Classic PCI based product line"); |
| 32 | MODULE_SUPPORTED_DEVICE("dgnc"); |
| 33 | |
| 34 | /************************************************************************** |
| 35 | * |
| 36 | * protos for this file |
| 37 | * |
| 38 | */ |
| 39 | static int dgnc_start(void); |
| 40 | static int dgnc_finalize_board_init(struct dgnc_board *brd); |
| 41 | static int dgnc_found_board(struct pci_dev *pdev, int id); |
| 42 | static void dgnc_cleanup_board(struct dgnc_board *brd); |
| 43 | static void dgnc_poll_handler(ulong dummy); |
| 44 | static int dgnc_init_one(struct pci_dev *pdev, |
| 45 | const struct pci_device_id *ent); |
| 46 | static void dgnc_do_remap(struct dgnc_board *brd); |
| 47 | |
| 48 | /* |
| 49 | * File operations permitted on Control/Management major. |
| 50 | */ |
| 51 | static const struct file_operations dgnc_BoardFops = { |
| 52 | .owner = THIS_MODULE, |
| 53 | .unlocked_ioctl = dgnc_mgmt_ioctl, |
| 54 | .open = dgnc_mgmt_open, |
| 55 | .release = dgnc_mgmt_close |
| 56 | }; |
| 57 | |
| 58 | /* |
| 59 | * Globals |
| 60 | */ |
| 61 | uint dgnc_NumBoards; |
| 62 | struct dgnc_board *dgnc_Board[MAXBOARDS]; |
| 63 | DEFINE_SPINLOCK(dgnc_global_lock); |
| 64 | DEFINE_SPINLOCK(dgnc_poll_lock); /* Poll scheduling lock */ |
| 65 | uint dgnc_Major; |
| 66 | int dgnc_poll_tick = 20; /* Poll interval - 20 ms */ |
| 67 | |
| 68 | /* |
| 69 | * Static vars. |
| 70 | */ |
| 71 | static struct class *dgnc_class; |
| 72 | |
| 73 | /* |
| 74 | * Poller stuff |
| 75 | */ |
| 76 | static ulong dgnc_poll_time; /* Time of next poll */ |
| 77 | static uint dgnc_poll_stop; /* Used to tell poller to stop */ |
| 78 | static struct timer_list dgnc_poll_timer; |
| 79 | |
| 80 | static const struct pci_device_id dgnc_pci_tbl[] = { |
| 81 | {PCI_DEVICE(DIGI_VID, PCI_DEVICE_CLASSIC_4_DID), .driver_data = 0}, |
| 82 | {PCI_DEVICE(DIGI_VID, PCI_DEVICE_CLASSIC_4_422_DID), .driver_data = 1}, |
| 83 | {PCI_DEVICE(DIGI_VID, PCI_DEVICE_CLASSIC_8_DID), .driver_data = 2}, |
| 84 | {PCI_DEVICE(DIGI_VID, PCI_DEVICE_CLASSIC_8_422_DID), .driver_data = 3}, |
| 85 | {0,} |
| 86 | }; |
| 87 | MODULE_DEVICE_TABLE(pci, dgnc_pci_tbl); |
| 88 | |
| 89 | struct board_id { |
| 90 | unsigned char *name; |
| 91 | uint maxports; |
| 92 | unsigned int is_pci_express; |
| 93 | }; |
| 94 | |
| 95 | static struct board_id dgnc_Ids[] = { |
| 96 | { PCI_DEVICE_CLASSIC_4_PCI_NAME, 4, 0 }, |
| 97 | { PCI_DEVICE_CLASSIC_4_422_PCI_NAME, 4, 0 }, |
| 98 | { PCI_DEVICE_CLASSIC_8_PCI_NAME, 8, 0 }, |
| 99 | { PCI_DEVICE_CLASSIC_8_422_PCI_NAME, 8, 0 }, |
| 100 | { PCI_DEVICE_NEO_4_PCI_NAME, 4, 0 }, |
| 101 | { PCI_DEVICE_NEO_8_PCI_NAME, 8, 0 }, |
| 102 | { PCI_DEVICE_NEO_2DB9_PCI_NAME, 2, 0 }, |
| 103 | { PCI_DEVICE_NEO_2DB9PRI_PCI_NAME, 2, 0 }, |
| 104 | { PCI_DEVICE_NEO_2RJ45_PCI_NAME, 2, 0 }, |
| 105 | { PCI_DEVICE_NEO_2RJ45PRI_PCI_NAME, 2, 0 }, |
| 106 | { PCI_DEVICE_NEO_1_422_PCI_NAME, 1, 0 }, |
| 107 | { PCI_DEVICE_NEO_1_422_485_PCI_NAME, 1, 0 }, |
| 108 | { PCI_DEVICE_NEO_2_422_485_PCI_NAME, 2, 0 }, |
| 109 | { PCI_DEVICE_NEO_EXPRESS_8_PCI_NAME, 8, 1 }, |
| 110 | { PCI_DEVICE_NEO_EXPRESS_4_PCI_NAME, 4, 1 }, |
| 111 | { PCI_DEVICE_NEO_EXPRESS_4RJ45_PCI_NAME, 4, 1 }, |
| 112 | { PCI_DEVICE_NEO_EXPRESS_8RJ45_PCI_NAME, 8, 1 }, |
| 113 | { NULL, 0, 0 } |
| 114 | }; |
| 115 | |
| 116 | static struct pci_driver dgnc_driver = { |
| 117 | .name = "dgnc", |
| 118 | .probe = dgnc_init_one, |
| 119 | .id_table = dgnc_pci_tbl, |
| 120 | }; |
| 121 | |
| 122 | /************************************************************************ |
| 123 | * |
| 124 | * Driver load/unload functions |
| 125 | * |
| 126 | ************************************************************************/ |
| 127 | |
| 128 | /* |
| 129 | * dgnc_cleanup_module() |
| 130 | * |
| 131 | * Module unload. This is where it all ends. |
| 132 | */ |
| 133 | static void dgnc_cleanup_module(void) |
| 134 | { |
| 135 | int i; |
| 136 | unsigned long flags; |
| 137 | |
| 138 | spin_lock_irqsave(&dgnc_poll_lock, flags); |
| 139 | dgnc_poll_stop = 1; |
| 140 | spin_unlock_irqrestore(&dgnc_poll_lock, flags); |
| 141 | |
| 142 | /* Turn off poller right away. */ |
| 143 | del_timer_sync(&dgnc_poll_timer); |
| 144 | |
| 145 | dgnc_remove_driver_sysfiles(&dgnc_driver); |
| 146 | |
| 147 | device_destroy(dgnc_class, MKDEV(dgnc_Major, 0)); |
| 148 | class_destroy(dgnc_class); |
| 149 | unregister_chrdev(dgnc_Major, "dgnc"); |
| 150 | |
| 151 | for (i = 0; i < dgnc_NumBoards; ++i) { |
| 152 | dgnc_remove_ports_sysfiles(dgnc_Board[i]); |
| 153 | dgnc_tty_uninit(dgnc_Board[i]); |
| 154 | dgnc_cleanup_board(dgnc_Board[i]); |
| 155 | } |
| 156 | |
| 157 | dgnc_tty_post_uninit(); |
| 158 | |
| 159 | if (dgnc_NumBoards) |
| 160 | pci_unregister_driver(&dgnc_driver); |
| 161 | } |
| 162 | |
| 163 | /* |
| 164 | * init_module() |
| 165 | * |
| 166 | * Module load. This is where it all starts. |
| 167 | */ |
| 168 | static int __init dgnc_init_module(void) |
| 169 | { |
| 170 | int rc; |
| 171 | |
| 172 | /* |
| 173 | * Initialize global stuff |
| 174 | */ |
| 175 | rc = dgnc_start(); |
| 176 | |
| 177 | if (rc < 0) |
| 178 | return rc; |
| 179 | |
| 180 | /* |
| 181 | * Find and configure all the cards |
| 182 | */ |
| 183 | rc = pci_register_driver(&dgnc_driver); |
| 184 | |
| 185 | /* |
| 186 | * If something went wrong in the scan, bail out of driver. |
| 187 | */ |
| 188 | if (rc < 0) { |
| 189 | /* Only unregister if it was actually registered. */ |
| 190 | if (dgnc_NumBoards) |
| 191 | pci_unregister_driver(&dgnc_driver); |
| 192 | else |
| 193 | pr_warn("WARNING: dgnc driver load failed. No Digi Neo or Classic boards found.\n"); |
| 194 | |
| 195 | dgnc_cleanup_module(); |
| 196 | } else { |
| 197 | dgnc_create_driver_sysfiles(&dgnc_driver); |
| 198 | } |
| 199 | |
| 200 | return rc; |
| 201 | } |
| 202 | |
| 203 | module_init(dgnc_init_module); |
| 204 | module_exit(dgnc_cleanup_module); |
| 205 | |
| 206 | /* |
| 207 | * Start of driver. |
| 208 | */ |
| 209 | static int dgnc_start(void) |
| 210 | { |
| 211 | int rc = 0; |
| 212 | unsigned long flags; |
| 213 | struct device *dev; |
| 214 | |
| 215 | /* make sure timer is initialized before we do anything else */ |
| 216 | init_timer(&dgnc_poll_timer); |
| 217 | |
| 218 | /* |
| 219 | * Register our base character device into the kernel. |
| 220 | * This allows the download daemon to connect to the downld device |
| 221 | * before any of the boards are init'ed. |
| 222 | * |
| 223 | * Register management/dpa devices |
| 224 | */ |
| 225 | rc = register_chrdev(0, "dgnc", &dgnc_BoardFops); |
| 226 | if (rc < 0) { |
| 227 | pr_err(DRVSTR ": Can't register dgnc driver device (%d)\n", rc); |
| 228 | return rc; |
| 229 | } |
| 230 | dgnc_Major = rc; |
| 231 | |
| 232 | dgnc_class = class_create(THIS_MODULE, "dgnc_mgmt"); |
| 233 | if (IS_ERR(dgnc_class)) { |
| 234 | rc = PTR_ERR(dgnc_class); |
| 235 | pr_err(DRVSTR ": Can't create dgnc_mgmt class (%d)\n", rc); |
| 236 | goto failed_class; |
| 237 | } |
| 238 | |
| 239 | dev = device_create(dgnc_class, NULL, |
| 240 | MKDEV(dgnc_Major, 0), |
| 241 | NULL, "dgnc_mgmt"); |
| 242 | if (IS_ERR(dev)) { |
| 243 | rc = PTR_ERR(dev); |
| 244 | pr_err(DRVSTR ": Can't create device (%d)\n", rc); |
| 245 | goto failed_device; |
| 246 | } |
| 247 | |
| 248 | /* |
| 249 | * Init any global tty stuff. |
| 250 | */ |
| 251 | rc = dgnc_tty_preinit(); |
| 252 | |
| 253 | if (rc < 0) { |
| 254 | pr_err(DRVSTR ": tty preinit - not enough memory (%d)\n", rc); |
| 255 | goto failed_tty; |
| 256 | } |
| 257 | |
| 258 | /* Start the poller */ |
| 259 | spin_lock_irqsave(&dgnc_poll_lock, flags); |
| 260 | setup_timer(&dgnc_poll_timer, dgnc_poll_handler, 0); |
| 261 | dgnc_poll_time = jiffies + dgnc_jiffies_from_ms(dgnc_poll_tick); |
| 262 | dgnc_poll_timer.expires = dgnc_poll_time; |
| 263 | spin_unlock_irqrestore(&dgnc_poll_lock, flags); |
| 264 | |
| 265 | add_timer(&dgnc_poll_timer); |
| 266 | |
| 267 | return 0; |
| 268 | |
| 269 | failed_tty: |
| 270 | device_destroy(dgnc_class, MKDEV(dgnc_Major, 0)); |
| 271 | failed_device: |
| 272 | class_destroy(dgnc_class); |
| 273 | failed_class: |
| 274 | unregister_chrdev(dgnc_Major, "dgnc"); |
| 275 | return rc; |
| 276 | } |
| 277 | |
| 278 | /* returns count (>= 0), or negative on error */ |
| 279 | static int dgnc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) |
| 280 | { |
| 281 | int rc; |
| 282 | |
| 283 | /* wake up and enable device */ |
| 284 | rc = pci_enable_device(pdev); |
| 285 | |
| 286 | if (rc < 0) { |
| 287 | rc = -EIO; |
| 288 | } else { |
| 289 | rc = dgnc_found_board(pdev, ent->driver_data); |
| 290 | if (rc == 0) |
| 291 | dgnc_NumBoards++; |
| 292 | } |
| 293 | return rc; |
| 294 | } |
| 295 | |
| 296 | /* |
| 297 | * dgnc_cleanup_board() |
| 298 | * |
| 299 | * Free all the memory associated with a board |
| 300 | */ |
| 301 | static void dgnc_cleanup_board(struct dgnc_board *brd) |
| 302 | { |
| 303 | int i = 0; |
| 304 | |
| 305 | if (!brd || brd->magic != DGNC_BOARD_MAGIC) |
| 306 | return; |
| 307 | |
| 308 | switch (brd->device) { |
| 309 | case PCI_DEVICE_CLASSIC_4_DID: |
| 310 | case PCI_DEVICE_CLASSIC_8_DID: |
| 311 | case PCI_DEVICE_CLASSIC_4_422_DID: |
| 312 | case PCI_DEVICE_CLASSIC_8_422_DID: |
| 313 | |
| 314 | /* Tell card not to interrupt anymore. */ |
| 315 | outb(0, brd->iobase + 0x4c); |
| 316 | break; |
| 317 | |
| 318 | default: |
| 319 | break; |
| 320 | } |
| 321 | |
| 322 | if (brd->irq) |
| 323 | free_irq(brd->irq, brd); |
| 324 | |
| 325 | tasklet_kill(&brd->helper_tasklet); |
| 326 | |
| 327 | if (brd->re_map_membase) { |
| 328 | iounmap(brd->re_map_membase); |
| 329 | brd->re_map_membase = NULL; |
| 330 | } |
| 331 | |
| 332 | if (brd->msgbuf_head) { |
| 333 | unsigned long flags; |
| 334 | |
| 335 | spin_lock_irqsave(&dgnc_global_lock, flags); |
| 336 | brd->msgbuf = NULL; |
| 337 | dev_dbg(&brd->pdev->dev, "%s\n", brd->msgbuf_head); |
| 338 | kfree(brd->msgbuf_head); |
| 339 | brd->msgbuf_head = NULL; |
| 340 | spin_unlock_irqrestore(&dgnc_global_lock, flags); |
| 341 | } |
| 342 | |
| 343 | /* Free all allocated channels structs */ |
| 344 | for (i = 0; i < MAXPORTS ; i++) { |
| 345 | if (brd->channels[i]) { |
| 346 | kfree(brd->channels[i]->ch_rqueue); |
| 347 | kfree(brd->channels[i]->ch_equeue); |
| 348 | kfree(brd->channels[i]->ch_wqueue); |
| 349 | kfree(brd->channels[i]); |
| 350 | brd->channels[i] = NULL; |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | dgnc_Board[brd->boardnum] = NULL; |
| 355 | |
| 356 | kfree(brd); |
| 357 | } |
| 358 | |
| 359 | /* |
| 360 | * dgnc_found_board() |
| 361 | * |
| 362 | * A board has been found, init it. |
| 363 | */ |
| 364 | static int dgnc_found_board(struct pci_dev *pdev, int id) |
| 365 | { |
| 366 | struct dgnc_board *brd; |
| 367 | unsigned int pci_irq; |
| 368 | int i = 0; |
| 369 | int rc = 0; |
| 370 | unsigned long flags; |
| 371 | |
| 372 | /* get the board structure and prep it */ |
| 373 | dgnc_Board[dgnc_NumBoards] = kzalloc(sizeof(*brd), GFP_KERNEL); |
| 374 | brd = dgnc_Board[dgnc_NumBoards]; |
| 375 | |
| 376 | if (!brd) |
| 377 | return -ENOMEM; |
| 378 | |
| 379 | /* make a temporary message buffer for the boot messages */ |
| 380 | brd->msgbuf_head = kcalloc(8192, sizeof(u8), GFP_KERNEL); |
| 381 | brd->msgbuf = brd->msgbuf_head; |
| 382 | |
| 383 | if (!brd->msgbuf) { |
| 384 | kfree(brd); |
| 385 | return -ENOMEM; |
| 386 | } |
| 387 | |
| 388 | /* store the info for the board we've found */ |
| 389 | brd->magic = DGNC_BOARD_MAGIC; |
| 390 | brd->boardnum = dgnc_NumBoards; |
| 391 | brd->vendor = dgnc_pci_tbl[id].vendor; |
| 392 | brd->device = dgnc_pci_tbl[id].device; |
| 393 | brd->pdev = pdev; |
| 394 | brd->pci_bus = pdev->bus->number; |
| 395 | brd->pci_slot = PCI_SLOT(pdev->devfn); |
| 396 | brd->name = dgnc_Ids[id].name; |
| 397 | brd->maxports = dgnc_Ids[id].maxports; |
| 398 | if (dgnc_Ids[i].is_pci_express) |
| 399 | brd->bd_flags |= BD_IS_PCI_EXPRESS; |
| 400 | brd->dpastatus = BD_NOFEP; |
| 401 | init_waitqueue_head(&brd->state_wait); |
| 402 | |
| 403 | spin_lock_init(&brd->bd_lock); |
| 404 | spin_lock_init(&brd->bd_intr_lock); |
| 405 | |
| 406 | brd->state = BOARD_FOUND; |
| 407 | |
| 408 | for (i = 0; i < MAXPORTS; i++) |
| 409 | brd->channels[i] = NULL; |
| 410 | |
| 411 | /* store which card & revision we have */ |
| 412 | pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &brd->subvendor); |
| 413 | pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &brd->subdevice); |
| 414 | pci_read_config_byte(pdev, PCI_REVISION_ID, &brd->rev); |
| 415 | |
| 416 | pci_irq = pdev->irq; |
| 417 | brd->irq = pci_irq; |
| 418 | |
| 419 | switch (brd->device) { |
| 420 | case PCI_DEVICE_CLASSIC_4_DID: |
| 421 | case PCI_DEVICE_CLASSIC_8_DID: |
| 422 | case PCI_DEVICE_CLASSIC_4_422_DID: |
| 423 | case PCI_DEVICE_CLASSIC_8_422_DID: |
| 424 | |
| 425 | brd->dpatype = T_CLASSIC | T_PCIBUS; |
| 426 | |
| 427 | /* |
| 428 | * For PCI ClassicBoards |
| 429 | * PCI Local Address (i.e. "resource" number) space |
| 430 | * 0 PLX Memory Mapped Config |
| 431 | * 1 PLX I/O Mapped Config |
| 432 | * 2 I/O Mapped UARTs and Status |
| 433 | * 3 Memory Mapped VPD |
| 434 | * 4 Memory Mapped UARTs and Status |
| 435 | */ |
| 436 | |
| 437 | /* get the PCI Base Address Registers */ |
| 438 | brd->membase = pci_resource_start(pdev, 4); |
| 439 | |
| 440 | if (!brd->membase) { |
| 441 | dev_err(&brd->pdev->dev, |
| 442 | "Card has no PCI IO resources, failing.\n"); |
| 443 | return -ENODEV; |
| 444 | } |
| 445 | |
| 446 | brd->membase_end = pci_resource_end(pdev, 4); |
| 447 | |
| 448 | if (brd->membase & 1) |
| 449 | brd->membase &= ~3; |
| 450 | else |
| 451 | brd->membase &= ~15; |
| 452 | |
| 453 | brd->iobase = pci_resource_start(pdev, 1); |
| 454 | brd->iobase_end = pci_resource_end(pdev, 1); |
| 455 | brd->iobase = ((unsigned int)(brd->iobase)) & 0xFFFE; |
| 456 | |
| 457 | /* Assign the board_ops struct */ |
| 458 | brd->bd_ops = &dgnc_cls_ops; |
| 459 | |
| 460 | brd->bd_uart_offset = 0x8; |
| 461 | brd->bd_dividend = 921600; |
| 462 | |
| 463 | dgnc_do_remap(brd); |
| 464 | |
| 465 | /* Get and store the board VPD, if it exists */ |
| 466 | brd->bd_ops->vpd(brd); |
| 467 | |
| 468 | /* |
| 469 | * Enable Local Interrupt 1 (0x1), |
| 470 | * Local Interrupt 1 Polarity Active high (0x2), |
| 471 | * Enable PCI interrupt (0x40) |
| 472 | */ |
| 473 | outb(0x43, brd->iobase + 0x4c); |
| 474 | |
| 475 | break; |
| 476 | |
| 477 | case PCI_DEVICE_NEO_4_DID: |
| 478 | case PCI_DEVICE_NEO_8_DID: |
| 479 | case PCI_DEVICE_NEO_2DB9_DID: |
| 480 | case PCI_DEVICE_NEO_2DB9PRI_DID: |
| 481 | case PCI_DEVICE_NEO_2RJ45_DID: |
| 482 | case PCI_DEVICE_NEO_2RJ45PRI_DID: |
| 483 | case PCI_DEVICE_NEO_1_422_DID: |
| 484 | case PCI_DEVICE_NEO_1_422_485_DID: |
| 485 | case PCI_DEVICE_NEO_2_422_485_DID: |
| 486 | case PCI_DEVICE_NEO_EXPRESS_8_DID: |
| 487 | case PCI_DEVICE_NEO_EXPRESS_4_DID: |
| 488 | case PCI_DEVICE_NEO_EXPRESS_4RJ45_DID: |
| 489 | case PCI_DEVICE_NEO_EXPRESS_8RJ45_DID: |
| 490 | |
| 491 | /* |
| 492 | * This chip is set up 100% when we get to it. |
| 493 | * No need to enable global interrupts or anything. |
| 494 | */ |
| 495 | if (brd->bd_flags & BD_IS_PCI_EXPRESS) |
| 496 | brd->dpatype = T_NEO_EXPRESS | T_PCIBUS; |
| 497 | else |
| 498 | brd->dpatype = T_NEO | T_PCIBUS; |
| 499 | |
| 500 | /* get the PCI Base Address Registers */ |
| 501 | brd->membase = pci_resource_start(pdev, 0); |
| 502 | brd->membase_end = pci_resource_end(pdev, 0); |
| 503 | |
| 504 | if (brd->membase & 1) |
| 505 | brd->membase &= ~3; |
| 506 | else |
| 507 | brd->membase &= ~15; |
| 508 | |
| 509 | /* Assign the board_ops struct */ |
| 510 | brd->bd_ops = &dgnc_neo_ops; |
| 511 | |
| 512 | brd->bd_uart_offset = 0x200; |
| 513 | brd->bd_dividend = 921600; |
| 514 | |
| 515 | dgnc_do_remap(brd); |
| 516 | |
| 517 | if (brd->re_map_membase) { |
| 518 | /* Read and store the dvid after remapping */ |
| 519 | brd->dvid = readb(brd->re_map_membase + 0x8D); |
| 520 | |
| 521 | /* Get and store the board VPD, if it exists */ |
| 522 | brd->bd_ops->vpd(brd); |
| 523 | } |
| 524 | break; |
| 525 | |
| 526 | default: |
| 527 | dev_err(&brd->pdev->dev, |
| 528 | "Didn't find any compatible Neo/Classic PCI boards.\n"); |
| 529 | return -ENXIO; |
| 530 | } |
| 531 | |
| 532 | /* |
| 533 | * Do tty device initialization. |
| 534 | */ |
| 535 | |
| 536 | rc = dgnc_tty_register(brd); |
| 537 | if (rc < 0) { |
| 538 | pr_err(DRVSTR ": Can't register tty devices (%d)\n", rc); |
| 539 | goto failed; |
| 540 | } |
| 541 | |
| 542 | rc = dgnc_finalize_board_init(brd); |
| 543 | if (rc < 0) { |
| 544 | pr_err(DRVSTR ": Can't finalize board init (%d)\n", rc); |
| 545 | goto failed; |
| 546 | } |
| 547 | |
| 548 | rc = dgnc_tty_init(brd); |
| 549 | if (rc < 0) { |
| 550 | pr_err(DRVSTR ": Can't init tty devices (%d)\n", rc); |
| 551 | goto failed; |
| 552 | } |
| 553 | |
| 554 | brd->state = BOARD_READY; |
| 555 | brd->dpastatus = BD_RUNNING; |
| 556 | |
| 557 | dgnc_create_ports_sysfiles(brd); |
| 558 | |
| 559 | /* init our poll helper tasklet */ |
| 560 | tasklet_init(&brd->helper_tasklet, |
| 561 | brd->bd_ops->tasklet, |
| 562 | (unsigned long)brd); |
| 563 | |
| 564 | spin_lock_irqsave(&dgnc_global_lock, flags); |
| 565 | brd->msgbuf = NULL; |
| 566 | dev_dbg(&brd->pdev->dev, "%s\n", brd->msgbuf_head); |
| 567 | kfree(brd->msgbuf_head); |
| 568 | brd->msgbuf_head = NULL; |
| 569 | spin_unlock_irqrestore(&dgnc_global_lock, flags); |
| 570 | |
| 571 | wake_up_interruptible(&brd->state_wait); |
| 572 | |
| 573 | return 0; |
| 574 | |
| 575 | failed: |
| 576 | dgnc_tty_uninit(brd); |
| 577 | brd->state = BOARD_FAILED; |
| 578 | brd->dpastatus = BD_NOFEP; |
| 579 | |
| 580 | return -ENXIO; |
| 581 | } |
| 582 | |
| 583 | static int dgnc_finalize_board_init(struct dgnc_board *brd) |
| 584 | { |
| 585 | int rc = 0; |
| 586 | |
| 587 | if (!brd || brd->magic != DGNC_BOARD_MAGIC) |
| 588 | return -ENODEV; |
| 589 | |
| 590 | if (brd->irq) { |
| 591 | rc = request_irq(brd->irq, brd->bd_ops->intr, |
| 592 | IRQF_SHARED, "DGNC", brd); |
| 593 | |
| 594 | if (rc) { |
| 595 | dev_err(&brd->pdev->dev, |
| 596 | "Failed to hook IRQ %d\n", brd->irq); |
| 597 | brd->state = BOARD_FAILED; |
| 598 | brd->dpastatus = BD_NOFEP; |
| 599 | rc = -ENODEV; |
| 600 | } |
| 601 | } |
| 602 | return rc; |
| 603 | } |
| 604 | |
| 605 | /* |
| 606 | * Remap PCI memory. |
| 607 | */ |
| 608 | static void dgnc_do_remap(struct dgnc_board *brd) |
| 609 | { |
| 610 | if (!brd || brd->magic != DGNC_BOARD_MAGIC) |
| 611 | return; |
| 612 | |
| 613 | brd->re_map_membase = ioremap(brd->membase, 0x1000); |
| 614 | } |
| 615 | |
| 616 | /***************************************************************************** |
| 617 | * |
| 618 | * Function: |
| 619 | * |
| 620 | * dgnc_poll_handler |
| 621 | * |
| 622 | * Author: |
| 623 | * |
| 624 | * Scott H Kilau |
| 625 | * |
| 626 | * Parameters: |
| 627 | * |
| 628 | * dummy -- ignored |
| 629 | * |
| 630 | * Return Values: |
| 631 | * |
| 632 | * none |
| 633 | * |
| 634 | * Description: |
| 635 | * |
| 636 | * As each timer expires, it determines (a) whether the "transmit" |
| 637 | * waiter needs to be woken up, and (b) whether the poller needs to |
| 638 | * be rescheduled. |
| 639 | * |
| 640 | ******************************************************************************/ |
| 641 | |
| 642 | static void dgnc_poll_handler(ulong dummy) |
| 643 | { |
| 644 | struct dgnc_board *brd; |
| 645 | unsigned long flags; |
| 646 | int i; |
| 647 | unsigned long new_time; |
| 648 | |
| 649 | /* Go thru each board, kicking off a tasklet for each if needed */ |
| 650 | for (i = 0; i < dgnc_NumBoards; i++) { |
| 651 | brd = dgnc_Board[i]; |
| 652 | |
| 653 | spin_lock_irqsave(&brd->bd_lock, flags); |
| 654 | |
| 655 | /* If board is in a failed state don't schedule a tasklet */ |
| 656 | if (brd->state == BOARD_FAILED) { |
| 657 | spin_unlock_irqrestore(&brd->bd_lock, flags); |
| 658 | continue; |
| 659 | } |
| 660 | |
| 661 | /* Schedule a poll helper task */ |
| 662 | tasklet_schedule(&brd->helper_tasklet); |
| 663 | |
| 664 | spin_unlock_irqrestore(&brd->bd_lock, flags); |
| 665 | } |
| 666 | |
| 667 | /* |
| 668 | * Schedule ourself back at the nominal wakeup interval. |
| 669 | */ |
| 670 | spin_lock_irqsave(&dgnc_poll_lock, flags); |
| 671 | dgnc_poll_time += dgnc_jiffies_from_ms(dgnc_poll_tick); |
| 672 | |
| 673 | new_time = dgnc_poll_time - jiffies; |
| 674 | |
| 675 | if ((ulong)new_time >= 2 * dgnc_poll_tick) |
| 676 | dgnc_poll_time = jiffies + dgnc_jiffies_from_ms(dgnc_poll_tick); |
| 677 | |
| 678 | setup_timer(&dgnc_poll_timer, dgnc_poll_handler, 0); |
| 679 | dgnc_poll_timer.expires = dgnc_poll_time; |
| 680 | spin_unlock_irqrestore(&dgnc_poll_lock, flags); |
| 681 | |
| 682 | if (!dgnc_poll_stop) |
| 683 | add_timer(&dgnc_poll_timer); |
| 684 | } |