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1 /*

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 * You should have received a copy of the GNU General Public License

16 * along with this program; if not, write to the Free Software

17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

18 *

19 *

20 * NOTE TO LINUX KERNEL HACKERS: DO NOT REFORMAT THIS CODE!

21 *

22 * This is shared code between Digi's CVS archive and the

23 * Linux Kernel sources.

24 * Changing the source just for reformatting needlessly breaks

25 * our CVS diff history.

26 *

27 * Send any bug fixes/changes to: Eng.Linux at digi dot com.

28 * Thank you.

29 *

30 */

33 #include <linux/kernel.h>

34 #include <linux/version.h>

35 #include <linux/module.h>

36 #include <linux/pci.h>

37 #include <linux/slab.h>

39 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39)

40 #include <linux/sched.h>

41 #endif

43 #include "dgnc_driver.h"

44 #include "dgnc_pci.h"

45 #include "dpacompat.h"

46 #include "dgnc_mgmt.h"

47 #include "dgnc_tty.h"

48 #include "dgnc_trace.h"

49 #include "dgnc_cls.h"

50 #include "dgnc_neo.h"

51 #include "dgnc_sysfs.h"

53 MODULE_LICENSE("GPL");

54 MODULE_AUTHOR("Digi International, http://www.digi.com");

55 MODULE_DESCRIPTION("Driver for the Digi International Neo and Classic PCI based product line");

56 MODULE_SUPPORTED_DEVICE("dgnc");

58 /*

59 * insmod command line overrideable parameters

60 *

61 * NOTE: we use a set of macros to create the variables, which allows

62 * us to specify the variable type, name, initial value, and description.

63 */

64 PARM_INT(debug, 0x00, 0644, "Driver debugging level");

65 PARM_INT(rawreadok, 1, 0644, "Bypass flip buffers on input");

66 PARM_INT(trcbuf_size, 0x100000, 0644, "Debugging trace buffer size.");

68 /**************************************************************************

69 *

70 * protos for this file

71 *

72 */

73 static int dgnc_start(void);

74 static int dgnc_finalize_board_init(struct board_t *brd);

75 static void dgnc_init_globals(void);

76 static int dgnc_found_board(struct pci_dev *pdev, int id);

77 static void dgnc_cleanup_board(struct board_t *brd);

78 static void dgnc_poll_handler(ulong dummy);

79 static int dgnc_init_pci(void);

80 static int dgnc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);

81 static void dgnc_remove_one(struct pci_dev *dev);

82 static int dgnc_probe1(struct pci_dev *pdev, int card_type);

83 static void dgnc_do_remap(struct board_t *brd);

84 static void dgnc_mbuf(struct board_t *brd, const char *fmt, ...);

87 /* Driver load/unload functions */

88 int dgnc_init_module(void);

89 void dgnc_cleanup_module(void);

91 module_init(dgnc_init_module);

92 module_exit(dgnc_cleanup_module);

95 /*

96 * File operations permitted on Control/Management major.

97 */

98 static struct file_operations dgnc_BoardFops =

99 {

100 .owner = THIS_MODULE,

101 .unlocked_ioctl = dgnc_mgmt_ioctl,

102 .open = dgnc_mgmt_open,

103 .release = dgnc_mgmt_close

104 };

105

106

107 /*

108 * Globals

109 */

110 uint dgnc_NumBoards;

111 struct board_t *dgnc_Board[MAXBOARDS];

112 DEFINE_SPINLOCK(dgnc_global_lock);

113 int dgnc_driver_state = DRIVER_INITIALIZED;

114 ulong dgnc_poll_counter;

115 uint dgnc_Major;

116 int dgnc_poll_tick = 20; /* Poll interval - 20 ms */

117

118 /*

119 * Static vars.

120 */

121 static uint dgnc_Major_Control_Registered = FALSE;

122 static uint dgnc_driver_start = FALSE;

123

124 static struct class *dgnc_class;

125

126 /*

127 * Poller stuff

128 */

129 static DEFINE_SPINLOCK(dgnc_poll_lock); /* Poll scheduling lock */

130 static ulong dgnc_poll_time; /* Time of next poll */

131 static uint dgnc_poll_stop; /* Used to tell poller to stop */

132 static struct timer_list dgnc_poll_timer;

133

134

135 static struct pci_device_id dgnc_pci_tbl[] = {

136 { DIGI_VID, PCI_DEVICE_CLASSIC_4_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },

137 { DIGI_VID, PCI_DEVICE_CLASSIC_4_422_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 },

138 { DIGI_VID, PCI_DEVICE_CLASSIC_8_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2 },

139 { DIGI_VID, PCI_DEVICE_CLASSIC_8_422_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3 },

140 { DIGI_VID, PCI_DEVICE_NEO_4_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4 },

141 { DIGI_VID, PCI_DEVICE_NEO_8_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5 },

142 { DIGI_VID, PCI_DEVICE_NEO_2DB9_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 6 },

143 { DIGI_VID, PCI_DEVICE_NEO_2DB9PRI_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 7 },

144 { DIGI_VID, PCI_DEVICE_NEO_2RJ45_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 8 },

145 { DIGI_VID, PCI_DEVICE_NEO_2RJ45PRI_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 9 },

146 { DIGI_VID, PCI_DEVICE_NEO_1_422_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 10 },

147 { DIGI_VID, PCI_DEVICE_NEO_1_422_485_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 11 },

148 { DIGI_VID, PCI_DEVICE_NEO_2_422_485_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 12 },

149 { DIGI_VID, PCI_DEVICE_NEO_EXPRESS_8_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 13 },

150 { DIGI_VID, PCI_DEVICE_NEO_EXPRESS_4_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 14 },

151 { DIGI_VID, PCI_DEVICE_NEO_EXPRESS_4RJ45_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 15 },

152 { DIGI_VID, PCI_DEVICE_NEO_EXPRESS_8RJ45_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 16 },

153 {0,} /* 0 terminated list. */

154 };

155 MODULE_DEVICE_TABLE(pci, dgnc_pci_tbl);

156

157 struct board_id {

158 uchar *name;

159 uint maxports;

160 unsigned int is_pci_express;

161 };

162

163 static struct board_id dgnc_Ids[] =

164 {

165 { PCI_DEVICE_CLASSIC_4_PCI_NAME, 4, 0 },

166 { PCI_DEVICE_CLASSIC_4_422_PCI_NAME, 4, 0 },

167 { PCI_DEVICE_CLASSIC_8_PCI_NAME, 8, 0 },

168 { PCI_DEVICE_CLASSIC_8_422_PCI_NAME, 8, 0 },

169 { PCI_DEVICE_NEO_4_PCI_NAME, 4, 0 },

170 { PCI_DEVICE_NEO_8_PCI_NAME, 8, 0 },

171 { PCI_DEVICE_NEO_2DB9_PCI_NAME, 2, 0 },

172 { PCI_DEVICE_NEO_2DB9PRI_PCI_NAME, 2, 0 },

173 { PCI_DEVICE_NEO_2RJ45_PCI_NAME, 2, 0 },

174 { PCI_DEVICE_NEO_2RJ45PRI_PCI_NAME, 2, 0 },

175 { PCI_DEVICE_NEO_1_422_PCI_NAME, 1, 0 },

176 { PCI_DEVICE_NEO_1_422_485_PCI_NAME, 1, 0 },

177 { PCI_DEVICE_NEO_2_422_485_PCI_NAME, 2, 0 },

178 { PCI_DEVICE_NEO_EXPRESS_8_PCI_NAME, 8, 1 },

179 { PCI_DEVICE_NEO_EXPRESS_4_PCI_NAME, 4, 1 },

180 { PCI_DEVICE_NEO_EXPRESS_4RJ45_PCI_NAME, 4, 1 },

181 { PCI_DEVICE_NEO_EXPRESS_8RJ45_PCI_NAME, 8, 1 },

182 { NULL, 0, 0 }

183 };

184

185 static struct pci_driver dgnc_driver = {

186 .name = "dgnc",

187 .probe = dgnc_init_one,

188 .id_table = dgnc_pci_tbl,

189 .remove = dgnc_remove_one,

190 };

191

192

193 char *dgnc_state_text[] = {

194 "Board Failed",

195 "Board Found",

196 "Board READY",

197 };

198

199 char *dgnc_driver_state_text[] = {

200 "Driver Initialized",

201 "Driver Ready."

202 };

203

204

205

206 /************************************************************************

207 *

208 * Driver load/unload functions

209 *

210 ************************************************************************/

211

212

213 /*

214 * init_module()

215 *

216 * Module load. This is where it all starts.

217 */

218 int dgnc_init_module(void)

219 {

220 int rc = 0;

221

222 APR(("%s, Digi International Part Number %s\n", DG_NAME, DG_PART));

223

224 /*

225 * Initialize global stuff

226 */

227 rc = dgnc_start();

228

229 if (rc < 0) {

230 return(rc);

231 }

232

233 /*

234 * Find and configure all the cards

235 */

236 rc = dgnc_init_pci();

237

238 /*

239 * If something went wrong in the scan, bail out of driver.

240 */

241 if (rc < 0) {

242 /* Only unregister the pci driver if it was actually registered. */

243 if (dgnc_NumBoards)

244 pci_unregister_driver(&dgnc_driver);

245 else

246 printk("WARNING: dgnc driver load failed. No Digi Neo or Classic boards found.\n");

247

248 dgnc_cleanup_module();

249 }

250 else {

251 dgnc_create_driver_sysfiles(&dgnc_driver);

252 }

253

254 DPR_INIT(("Finished init_module. Returning %d\n", rc));

255 return (rc);

256 }

257

258

259 /*

260 * Start of driver.

261 */

262 static int dgnc_start(void)

263 {

264 int rc = 0;

265 unsigned long flags;

266

267 if (dgnc_driver_start == FALSE) {

268

269 dgnc_driver_start = TRUE;

270

271 /* make sure that the globals are init'd before we do anything else */

272 dgnc_init_globals();

273

274 dgnc_NumBoards = 0;

275

276 APR(("For the tools package or updated drivers please visit http://www.digi.com\n"));

277

278 /*

279 * Register our base character device into the kernel.

280 * This allows the download daemon to connect to the downld device

281 * before any of the boards are init'ed.

282 */

283 if (!dgnc_Major_Control_Registered) {

284 /*

285 * Register management/dpa devices

286 */

287 rc = register_chrdev(0, "dgnc", &dgnc_BoardFops);

288 if (rc <= 0) {

289 APR(("Can't register dgnc driver device (%d)\n", rc));

290 rc = -ENXIO;

291 return(rc);

292 }

293 dgnc_Major = rc;

294

295 dgnc_class = class_create(THIS_MODULE, "dgnc_mgmt");

296 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)

297 device_create_drvdata(dgnc_class, NULL,

298 MKDEV(dgnc_Major, 0),

299 NULL, "dgnc_mgmt");

300 #else

301 device_create(dgnc_class, NULL,

302 MKDEV(dgnc_Major, 0),

303 NULL, "dgnc_mgmt");

304 #endif

305

306 dgnc_Major_Control_Registered = TRUE;

307 }

308

309 /*

310 * Init any global tty stuff.

311 */

312 rc = dgnc_tty_preinit();

313

314 if (rc < 0) {

315 APR(("tty preinit - not enough memory (%d)\n", rc));

316 return(rc);

317 }

318

319 /* Start the poller */

320 DGNC_LOCK(dgnc_poll_lock, flags);

321 init_timer(&dgnc_poll_timer);

322 dgnc_poll_timer.function = dgnc_poll_handler;

323 dgnc_poll_timer.data = 0;

324 dgnc_poll_time = jiffies + dgnc_jiffies_from_ms(dgnc_poll_tick);

325 dgnc_poll_timer.expires = dgnc_poll_time;

326 DGNC_UNLOCK(dgnc_poll_lock, flags);

327

328 add_timer(&dgnc_poll_timer);

329

330 dgnc_driver_state = DRIVER_READY;

331 }

332

333 return(rc);

334 }

335

336 /*

337 * Register pci driver, and return how many boards we have.

338 */

339 static int dgnc_init_pci(void)

340 {

341 return pci_register_driver(&dgnc_driver);

342 }

343

344

345 /* returns count (>= 0), or negative on error */

346 static int dgnc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)

347 {

348 int rc;

349

350 /* wake up and enable device */

351 rc = pci_enable_device(pdev);

352

353 if (rc < 0) {

354 rc = -EIO;

355 } else {

356 rc = dgnc_probe1(pdev, ent->driver_data);

357 if (rc == 0) {

358 dgnc_NumBoards++;

359 DPR_INIT(("Incrementing numboards to %d\n", dgnc_NumBoards));

360 }

361 }

362 return rc;

363 }

364

365 static int dgnc_probe1(struct pci_dev *pdev, int card_type)

366 {

367 return dgnc_found_board(pdev, card_type);

368 }

369

370

371 static void dgnc_remove_one(struct pci_dev *dev)

372 {

373 /* Do Nothing */

374 }

375

376 /*

377 * dgnc_cleanup_module()

378 *

379 * Module unload. This is where it all ends.

380 */

381 void dgnc_cleanup_module(void)

382 {

383 int i;

384 ulong lock_flags;

385

386 DGNC_LOCK(dgnc_poll_lock, lock_flags);

387 dgnc_poll_stop = 1;

388 DGNC_UNLOCK(dgnc_poll_lock, lock_flags);

389

390 /* Turn off poller right away. */

391 del_timer_sync(&dgnc_poll_timer);

392

393 dgnc_remove_driver_sysfiles(&dgnc_driver);

394

395 if (dgnc_Major_Control_Registered) {

396 device_destroy(dgnc_class, MKDEV(dgnc_Major, 0));

397 class_destroy(dgnc_class);

398 unregister_chrdev(dgnc_Major, "dgnc");

399 }

400

401 for (i = 0; i < dgnc_NumBoards; ++i) {

402 dgnc_remove_ports_sysfiles(dgnc_Board[i]);

403 dgnc_tty_uninit(dgnc_Board[i]);

404 dgnc_cleanup_board(dgnc_Board[i]);

405 }

406

407 dgnc_tty_post_uninit();

408

409 #if defined(DGNC_TRACER)

410 /* last thing, make sure we release the tracebuffer */

411 dgnc_tracer_free();

412 #endif

413 if (dgnc_NumBoards)

414 pci_unregister_driver(&dgnc_driver);

415 }

416

417

418 /*

419 * dgnc_cleanup_board()

420 *

421 * Free all the memory associated with a board

422 */

423 static void dgnc_cleanup_board(struct board_t *brd)

424 {

425 int i = 0;

426

427 if(!brd || brd->magic != DGNC_BOARD_MAGIC)

428 return;

429

430 switch (brd->device) {

431 case PCI_DEVICE_CLASSIC_4_DID:

432 case PCI_DEVICE_CLASSIC_8_DID:

433 case PCI_DEVICE_CLASSIC_4_422_DID:

434 case PCI_DEVICE_CLASSIC_8_422_DID:

435

436 /* Tell card not to interrupt anymore. */

437 outb(0, brd->iobase + 0x4c);

438 break;

439

440 default:

441 break;

442 }

443

444 if (brd->irq)

445 free_irq(brd->irq, brd);

446

447 tasklet_kill(&brd->helper_tasklet);

448

449 if (brd->re_map_membase) {

450 iounmap(brd->re_map_membase);

451 brd->re_map_membase = NULL;

452 }

453

454 if (brd->msgbuf_head) {

455 unsigned long flags;

456

457 DGNC_LOCK(dgnc_global_lock, flags);

458 brd->msgbuf = NULL;

459 printk(brd->msgbuf_head);

460 kfree(brd->msgbuf_head);

461 brd->msgbuf_head = NULL;

462 DGNC_UNLOCK(dgnc_global_lock, flags);

463 }

464

465 /* Free all allocated channels structs */

466 for (i = 0; i < MAXPORTS ; i++) {

467 if (brd->channels[i]) {

468 if (brd->channels[i]->ch_rqueue)

469 kfree(brd->channels[i]->ch_rqueue);

470 if (brd->channels[i]->ch_equeue)

471 kfree(brd->channels[i]->ch_equeue);

472 if (brd->channels[i]->ch_wqueue)

473 kfree(brd->channels[i]->ch_wqueue);

474

475 kfree(brd->channels[i]);

476 brd->channels[i] = NULL;

477 }

478 }

479

480 if (brd->flipbuf)

481 kfree(brd->flipbuf);

482

483 dgnc_Board[brd->boardnum] = NULL;

484

485 kfree(brd);

486 }

487

488

489 /*

490 * dgnc_found_board()

491 *

492 * A board has been found, init it.

493 */

494 static int dgnc_found_board(struct pci_dev *pdev, int id)

495 {

496 struct board_t *brd;

497 unsigned int pci_irq;

498 int i = 0;

499 int rc = 0;

500 unsigned long flags;

501

502 /* get the board structure and prep it */

503 brd = dgnc_Board[dgnc_NumBoards] =

504 (struct board_t *) dgnc_driver_kzmalloc(sizeof(struct board_t), GFP_KERNEL);

505 if (!brd) {

506 APR(("memory allocation for board structure failed\n"));

507 return(-ENOMEM);

508 }

509

510 /* make a temporary message buffer for the boot messages */

511 brd->msgbuf = brd->msgbuf_head =

512 (char *) dgnc_driver_kzmalloc(sizeof(char) * 8192, GFP_KERNEL);

513 if (!brd->msgbuf) {

514 kfree(brd);

515 APR(("memory allocation for board msgbuf failed\n"));

516 return(-ENOMEM);

517 }

518

519 /* store the info for the board we've found */

520 brd->magic = DGNC_BOARD_MAGIC;

521 brd->boardnum = dgnc_NumBoards;

522 brd->vendor = dgnc_pci_tbl[id].vendor;

523 brd->device = dgnc_pci_tbl[id].device;

524 brd->pdev = pdev;

525 brd->pci_bus = pdev->bus->number;

526 brd->pci_slot = PCI_SLOT(pdev->devfn);

527 brd->name = dgnc_Ids[id].name;

528 brd->maxports = dgnc_Ids[id].maxports;

529 if (dgnc_Ids[i].is_pci_express)

530 brd->bd_flags |= BD_IS_PCI_EXPRESS;

531 brd->dpastatus = BD_NOFEP;

532 init_waitqueue_head(&brd->state_wait);

533

534 DGNC_SPINLOCK_INIT(brd->bd_lock);

535 DGNC_SPINLOCK_INIT(brd->bd_intr_lock);

536

537 brd->state = BOARD_FOUND;

538

539 for (i = 0; i < MAXPORTS; i++) {

540 brd->channels[i] = NULL;

541 }

542

543 /* store which card & revision we have */

544 pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &brd->subvendor);

545 pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &brd->subdevice);

546 pci_read_config_byte(pdev, PCI_REVISION_ID, &brd->rev);

547

548 pci_irq = pdev->irq;

549 brd->irq = pci_irq;

550

551

552 switch(brd->device) {

553

554 case PCI_DEVICE_CLASSIC_4_DID:

555 case PCI_DEVICE_CLASSIC_8_DID:

556 case PCI_DEVICE_CLASSIC_4_422_DID:

557 case PCI_DEVICE_CLASSIC_8_422_DID:

558

559 brd->dpatype = T_CLASSIC | T_PCIBUS;

560

561 DPR_INIT(("dgnc_found_board - Classic.\n"));

562

563 /*

564 * For PCI ClassicBoards

565 * PCI Local Address (i.e. "resource" number) space

566 * 0 PLX Memory Mapped Config

567 * 1 PLX I/O Mapped Config

568 * 2 I/O Mapped UARTs and Status

569 * 3 Memory Mapped VPD

570 * 4 Memory Mapped UARTs and Status

571 */

572

573

574 /* get the PCI Base Address Registers */

575 brd->membase = pci_resource_start(pdev, 4);

576

577 if (!brd->membase) {

578 APR(("card has no PCI IO resources, failing board.\n"));

579 return -ENODEV;

580 }

581

582 brd->membase_end = pci_resource_end(pdev, 4);

583

584 if (brd->membase & 1)

585 brd->membase &= ~3;

586 else

587 brd->membase &= ~15;

588

589 brd->iobase = pci_resource_start(pdev, 1);

590 brd->iobase_end = pci_resource_end(pdev, 1);

591 brd->iobase = ((unsigned int) (brd->iobase)) & 0xFFFE;

592

593 /* Assign the board_ops struct */

594 brd->bd_ops = &dgnc_cls_ops;

595

596 brd->bd_uart_offset = 0x8;

597 brd->bd_dividend = 921600;

598

599 dgnc_do_remap(brd);

600

601 /* Get and store the board VPD, if it exists */

602 brd->bd_ops->vpd(brd);

603

604 /*

605 * Enable Local Interrupt 1 (0x1),

606 * Local Interrupt 1 Polarity Active high (0x2),

607 * Enable PCI interrupt (0x40)

608 */

609 outb(0x43, brd->iobase + 0x4c);

610

611 break;

612

613

614 case PCI_DEVICE_NEO_4_DID:

615 case PCI_DEVICE_NEO_8_DID:

616 case PCI_DEVICE_NEO_2DB9_DID:

617 case PCI_DEVICE_NEO_2DB9PRI_DID:

618 case PCI_DEVICE_NEO_2RJ45_DID:

619 case PCI_DEVICE_NEO_2RJ45PRI_DID:

620 case PCI_DEVICE_NEO_1_422_DID:

621 case PCI_DEVICE_NEO_1_422_485_DID:

622 case PCI_DEVICE_NEO_2_422_485_DID:

623 case PCI_DEVICE_NEO_EXPRESS_8_DID:

624 case PCI_DEVICE_NEO_EXPRESS_4_DID:

625 case PCI_DEVICE_NEO_EXPRESS_4RJ45_DID:

626 case PCI_DEVICE_NEO_EXPRESS_8RJ45_DID:

627

628 /*

629 * This chip is set up 100% when we get to it.

630 * No need to enable global interrupts or anything.

631 */

632 if (brd->bd_flags & BD_IS_PCI_EXPRESS)

633 brd->dpatype = T_NEO_EXPRESS | T_PCIBUS;

634 else

635 brd->dpatype = T_NEO | T_PCIBUS;

636

637 DPR_INIT(("dgnc_found_board - NEO.\n"));

638

639 /* get the PCI Base Address Registers */

640 brd->membase = pci_resource_start(pdev, 0);

641 brd->membase_end = pci_resource_end(pdev, 0);

642

643 if (brd->membase & 1)

644 brd->membase &= ~3;

645 else

646 brd->membase &= ~15;

647

648 /* Assign the board_ops struct */

649 brd->bd_ops = &dgnc_neo_ops;

650

651 brd->bd_uart_offset = 0x200;

652 brd->bd_dividend = 921600;

653

654 dgnc_do_remap(brd);

655

656 if (brd->re_map_membase) {

657

658 /* After remap is complete, we need to read and store the dvid */

659 brd->dvid = readb(brd->re_map_membase + 0x8D);

660

661 /* Get and store the board VPD, if it exists */

662 brd->bd_ops->vpd(brd);

663 }

664 break;

665

666 default:

667 APR(("Did not find any compatible Neo or Classic PCI boards in system.\n"));

668 return (-ENXIO);

669

670 }

671

672 /*

673 * Do tty device initialization.

674 */

675

676 rc = dgnc_tty_register(brd);

677 if (rc < 0) {

678 dgnc_tty_uninit(brd);

679 APR(("Can't register tty devices (%d)\n", rc));

680 brd->state = BOARD_FAILED;

681 brd->dpastatus = BD_NOFEP;

682 goto failed;

683 }

684

685 rc = dgnc_finalize_board_init(brd);

686 if (rc < 0) {

687 APR(("Can't finalize board init (%d)\n", rc));

688 brd->state = BOARD_FAILED;

689 brd->dpastatus = BD_NOFEP;

690

691 goto failed;

692 }

693

694 rc = dgnc_tty_init(brd);

695 if (rc < 0) {

696 dgnc_tty_uninit(brd);

697 APR(("Can't init tty devices (%d)\n", rc));

698 brd->state = BOARD_FAILED;

699 brd->dpastatus = BD_NOFEP;

700

701 goto failed;

702 }

703

704 brd->state = BOARD_READY;

705 brd->dpastatus = BD_RUNNING;

706

707 dgnc_create_ports_sysfiles(brd);

708

709 /* init our poll helper tasklet */

710 tasklet_init(&brd->helper_tasklet, brd->bd_ops->tasklet, (unsigned long) brd);

711

712 /* Log the information about the board */

713 dgnc_mbuf(brd, DRVSTR": board %d: %s (rev %d), irq %d\n",

714 dgnc_NumBoards, brd->name, brd->rev, brd->irq);

715

716 DPR_INIT(("dgnc_scan(%d) - printing out the msgbuf\n", i));

717 DGNC_LOCK(dgnc_global_lock, flags);

718 brd->msgbuf = NULL;

719 printk(brd->msgbuf_head);

720 kfree(brd->msgbuf_head);

721 brd->msgbuf_head = NULL;

722 DGNC_UNLOCK(dgnc_global_lock, flags);

723

724 /*

725 * allocate flip buffer for board.

726 *

727 * Okay to malloc with GFP_KERNEL, we are not at interrupt

728 * context, and there are no locks held.

729 */

730 brd->flipbuf = dgnc_driver_kzmalloc(MYFLIPLEN, GFP_KERNEL);

731

732 wake_up_interruptible(&brd->state_wait);

734 return(0);

736 failed:

738 return (-ENXIO);

740 }

743 static int dgnc_finalize_board_init(struct board_t *brd) {

744 int rc = 0;

745

746 DPR_INIT(("dgnc_finalize_board_init() - start\n"));

747

748 if (!brd || brd->magic != DGNC_BOARD_MAGIC)

749 return(-ENODEV);

750

751 DPR_INIT(("dgnc_finalize_board_init() - start #2\n"));

752

753 if (brd->irq) {

754 rc = request_irq(brd->irq, brd->bd_ops->intr, IRQF_SHARED, "DGNC", brd);

755

756 if (rc) {

757 printk("Failed to hook IRQ %d\n",brd->irq);

758 brd->state = BOARD_FAILED;

759 brd->dpastatus = BD_NOFEP;

760 rc = -ENODEV;

761 } else {

762 DPR_INIT(("Requested and received usage of IRQ %d\n", brd->irq));

763 }

764 }

765 return(rc);

766 }

767

768 /*

769 * Remap PCI memory.

770 */

771 static void dgnc_do_remap(struct board_t *brd)

772 {

773

774 if (!brd || brd->magic != DGNC_BOARD_MAGIC)

775 return;

776

777 brd->re_map_membase = ioremap(brd->membase, 0x1000);

778

779 DPR_INIT(("remapped mem: 0x%p\n", brd->re_map_membase));

780 }

781

782

783 /*****************************************************************************

784 *

785 * Function:

786 *

787 * dgnc_poll_handler

788 *

789 * Author:

790 *

791 * Scott H Kilau

792 *

793 * Parameters:

794 *

795 * dummy -- ignored

796 *

797 * Return Values:

798 *

799 * none

800 *

801 * Description:

802 *

803 * As each timer expires, it determines (a) whether the "transmit"

804 * waiter needs to be woken up, and (b) whether the poller needs to

805 * be rescheduled.

806 *

807 ******************************************************************************/

808

809 static void dgnc_poll_handler(ulong dummy)

810 {

811 struct board_t *brd;

812 unsigned long lock_flags;

813 int i;

814 unsigned long new_time;

815

816 dgnc_poll_counter++;

817

818 /*

819 * Do not start the board state machine until

820 * driver tells us its up and running, and has

821 * everything it needs.

822 */

823 if (dgnc_driver_state != DRIVER_READY) {

824 goto schedule_poller;

825 }

826

827 /* Go thru each board, kicking off a tasklet for each if needed */

828 for (i = 0; i < dgnc_NumBoards; i++) {

829 brd = dgnc_Board[i];

830

831 DGNC_LOCK(brd->bd_lock, lock_flags);

832

833 /* If board is in a failed state, don't bother scheduling a tasklet */

834 if (brd->state == BOARD_FAILED) {

835 DGNC_UNLOCK(brd->bd_lock, lock_flags);

836 continue;

837 }

838

839 /* Schedule a poll helper task */

840 tasklet_schedule(&brd->helper_tasklet);

841

842 DGNC_UNLOCK(brd->bd_lock, lock_flags);

843 }

844

845 schedule_poller:

846

847 /*

848 * Schedule ourself back at the nominal wakeup interval.

849 */

850 DGNC_LOCK(dgnc_poll_lock, lock_flags);

851 dgnc_poll_time += dgnc_jiffies_from_ms(dgnc_poll_tick);

852

853 new_time = dgnc_poll_time - jiffies;

854

855 if ((ulong) new_time >= 2 * dgnc_poll_tick) {

856 dgnc_poll_time = jiffies + dgnc_jiffies_from_ms(dgnc_poll_tick);

857 }

858

859 init_timer(&dgnc_poll_timer);

860 dgnc_poll_timer.function = dgnc_poll_handler;

861 dgnc_poll_timer.data = 0;

862 dgnc_poll_timer.expires = dgnc_poll_time;

863 DGNC_UNLOCK(dgnc_poll_lock, lock_flags);

864

865 if (!dgnc_poll_stop)

866 add_timer(&dgnc_poll_timer);

867 }

868

869 /*

870 * dgnc_init_globals()

871 *

872 * This is where we initialize the globals from the static insmod

873 * configuration variables. These are declared near the head of

874 * this file.

875 */

876 static void dgnc_init_globals(void)

877 {

878 int i = 0;

879

880 dgnc_rawreadok = rawreadok;

881 dgnc_trcbuf_size = trcbuf_size;

882 dgnc_debug = debug;

883

884 for (i = 0; i < MAXBOARDS; i++) {

885 dgnc_Board[i] = NULL;

886 }

887

888 init_timer(&dgnc_poll_timer);

889 }

890

891

892 /************************************************************************

893 *

894 * Utility functions

895 *

896 ************************************************************************/

897

898

899 /*

900 * dgnc_driver_kzmalloc()

901 *

902 * Malloc and clear memory,

903 */

904 void *dgnc_driver_kzmalloc(size_t size, int priority)

905 {

906 void *p = kmalloc(size, priority);

907 if(p)

908 memset(p, 0, size);

909 return(p);

910 }

911

912

913 /*

914 * dgnc_mbuf()

915 *

916 * Used to print to the message buffer during board init.

917 */

918 static void dgnc_mbuf(struct board_t *brd, const char *fmt, ...) {

919 va_list ap;

920 char buf[1024];

921 int i;

922 unsigned long flags;

923

924 DGNC_LOCK(dgnc_global_lock, flags);

925

926 /* Format buf using fmt and arguments contained in ap. */

927 va_start(ap, fmt);

928 i = vsprintf(buf, fmt, ap);

929 va_end(ap);

930

931 DPR((buf));

932

933 if (!brd || !brd->msgbuf) {

934 printk(buf);

935 DGNC_UNLOCK(dgnc_global_lock, flags);

936 return;

937 }

938

939 memcpy(brd->msgbuf, buf, strlen(buf));

940 brd->msgbuf += strlen(buf);

941 *brd->msgbuf = '\0';

942

943 DGNC_UNLOCK(dgnc_global_lock, flags);

944 }

945

946

947 /*

948 * dgnc_ms_sleep()

949 *

950 * Put the driver to sleep for x ms's

951 *

952 * Returns 0 if timed out, !0 (showing signal) if interrupted by a signal.

953 */

954 int dgnc_ms_sleep(ulong ms)

955 {

956 current->state = TASK_INTERRUPTIBLE;

957 schedule_timeout((ms * HZ) / 1000);

958 return (signal_pending(current));

959 }

960

961

962

963 /*

964 * dgnc_ioctl_name() : Returns a text version of each ioctl value.

965 */

966 char *dgnc_ioctl_name(int cmd)

967 {

968 switch(cmd) {

969

970 case TCGETA: return("TCGETA");

971 case TCGETS: return("TCGETS");

972 case TCSETA: return("TCSETA");

973 case TCSETS: return("TCSETS");

974 case TCSETAW: return("TCSETAW");

975 case TCSETSW: return("TCSETSW");

976 case TCSETAF: return("TCSETAF");

977 case TCSETSF: return("TCSETSF");

978 case TCSBRK: return("TCSBRK");

979 case TCXONC: return("TCXONC");

980 case TCFLSH: return("TCFLSH");

981 case TIOCGSID: return("TIOCGSID");

982

983 case TIOCGETD: return("TIOCGETD");

984 case TIOCSETD: return("TIOCSETD");

985 case TIOCGWINSZ: return("TIOCGWINSZ");

986 case TIOCSWINSZ: return("TIOCSWINSZ");

987

988 case TIOCMGET: return("TIOCMGET");

989 case TIOCMSET: return("TIOCMSET");

990 case TIOCMBIS: return("TIOCMBIS");

991 case TIOCMBIC: return("TIOCMBIC");

992

993 /* from digi.h */

994 case DIGI_SETA: return("DIGI_SETA");

995 case DIGI_SETAW: return("DIGI_SETAW");

996 case DIGI_SETAF: return("DIGI_SETAF");

997 case DIGI_SETFLOW: return("DIGI_SETFLOW");

998 case DIGI_SETAFLOW: return("DIGI_SETAFLOW");

999 case DIGI_GETFLOW: return("DIGI_GETFLOW");

1000 case DIGI_GETAFLOW: return("DIGI_GETAFLOW");

1001 case DIGI_GETA: return("DIGI_GETA");

1002 case DIGI_GEDELAY: return("DIGI_GEDELAY");

1003 case DIGI_SEDELAY: return("DIGI_SEDELAY");

1004 case DIGI_GETCUSTOMBAUD: return("DIGI_GETCUSTOMBAUD");

1005 case DIGI_SETCUSTOMBAUD: return("DIGI_SETCUSTOMBAUD");

1006 case TIOCMODG: return("TIOCMODG");

1007 case TIOCMODS: return("TIOCMODS");

1008 case TIOCSDTR: return("TIOCSDTR");

1009 case TIOCCDTR: return("TIOCCDTR");

1010

1011 default: return("unknown");

1012 }

1013 }