| 1 | /* |
| 2 | Copyright (C) 1996 Digi International. |
| 3 | |
| 4 | For technical support please email digiLinux@dgii.com or |
| 5 | call Digi tech support at (612) 912-3456 |
| 6 | |
| 7 | ** This driver is no longer supported by Digi ** |
| 8 | |
| 9 | Much of this design and code came from epca.c which was |
| 10 | copyright (C) 1994, 1995 Troy De Jongh, and subsquently |
| 11 | modified by David Nugent, Christoph Lameter, Mike McLagan. |
| 12 | |
| 13 | This program is free software; you can redistribute it and/or modify |
| 14 | it under the terms of the GNU General Public License as published by |
| 15 | the Free Software Foundation; either version 2 of the License, or |
| 16 | (at your option) any later version. |
| 17 | |
| 18 | This program is distributed in the hope that it will be useful, |
| 19 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | GNU General Public License for more details. |
| 22 | |
| 23 | You should have received a copy of the GNU General Public License |
| 24 | along with this program; if not, write to the Free Software |
| 25 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 26 | */ |
| 27 | /* See README.epca for change history --DAT*/ |
| 28 | |
| 29 | #include <linux/module.h> |
| 30 | #include <linux/kernel.h> |
| 31 | #include <linux/types.h> |
| 32 | #include <linux/init.h> |
| 33 | #include <linux/serial.h> |
| 34 | #include <linux/delay.h> |
| 35 | #include <linux/ctype.h> |
| 36 | #include <linux/tty.h> |
| 37 | #include <linux/tty_flip.h> |
| 38 | #include <linux/slab.h> |
| 39 | #include <linux/smp_lock.h> |
| 40 | #include <linux/ioport.h> |
| 41 | #include <linux/interrupt.h> |
| 42 | #include <linux/uaccess.h> |
| 43 | #include <linux/io.h> |
| 44 | #include <linux/spinlock.h> |
| 45 | #include <linux/pci.h> |
| 46 | #include "digiPCI.h" |
| 47 | |
| 48 | |
| 49 | #include "digi1.h" |
| 50 | #include "digiFep1.h" |
| 51 | #include "epca.h" |
| 52 | #include "epcaconfig.h" |
| 53 | |
| 54 | #define VERSION "1.3.0.1-LK2.6" |
| 55 | |
| 56 | /* This major needs to be submitted to Linux to join the majors list */ |
| 57 | #define DIGIINFOMAJOR 35 /* For Digi specific ioctl */ |
| 58 | |
| 59 | |
| 60 | #define MAXCARDS 7 |
| 61 | #define epcaassert(x, msg) if (!(x)) epca_error(__LINE__, msg) |
| 62 | |
| 63 | #define PFX "epca: " |
| 64 | |
| 65 | static int nbdevs, num_cards, liloconfig; |
| 66 | static int digi_poller_inhibited = 1 ; |
| 67 | |
| 68 | static int setup_error_code; |
| 69 | static int invalid_lilo_config; |
| 70 | |
| 71 | /* |
| 72 | * The ISA boards do window flipping into the same spaces so its only sane with |
| 73 | * a single lock. It's still pretty efficient. This lock guards the hardware |
| 74 | * and the tty_port lock guards the kernel side stuff like use counts. Take |
| 75 | * this lock inside the port lock if you must take both. |
| 76 | */ |
| 77 | static DEFINE_SPINLOCK(epca_lock); |
| 78 | |
| 79 | /* MAXBOARDS is typically 12, but ISA and EISA cards are restricted |
| 80 | to 7 below. */ |
| 81 | static struct board_info boards[MAXBOARDS]; |
| 82 | |
| 83 | static struct tty_driver *pc_driver; |
| 84 | static struct tty_driver *pc_info; |
| 85 | |
| 86 | /* ------------------ Begin Digi specific structures -------------------- */ |
| 87 | |
| 88 | /* |
| 89 | * digi_channels represents an array of structures that keep track of each |
| 90 | * channel of the Digi product. Information such as transmit and receive |
| 91 | * pointers, termio data, and signal definitions (DTR, CTS, etc ...) are stored |
| 92 | * here. This structure is NOT used to overlay the cards physical channel |
| 93 | * structure. |
| 94 | */ |
| 95 | static struct channel digi_channels[MAX_ALLOC]; |
| 96 | |
| 97 | /* |
| 98 | * card_ptr is an array used to hold the address of the first channel structure |
| 99 | * of each card. This array will hold the addresses of various channels located |
| 100 | * in digi_channels. |
| 101 | */ |
| 102 | static struct channel *card_ptr[MAXCARDS]; |
| 103 | |
| 104 | static struct timer_list epca_timer; |
| 105 | |
| 106 | /* |
| 107 | * Begin generic memory functions. These functions will be alias (point at) |
| 108 | * more specific functions dependent on the board being configured. |
| 109 | */ |
| 110 | static void memwinon(struct board_info *b, unsigned int win); |
| 111 | static void memwinoff(struct board_info *b, unsigned int win); |
| 112 | static void globalwinon(struct channel *ch); |
| 113 | static void rxwinon(struct channel *ch); |
| 114 | static void txwinon(struct channel *ch); |
| 115 | static void memoff(struct channel *ch); |
| 116 | static void assertgwinon(struct channel *ch); |
| 117 | static void assertmemoff(struct channel *ch); |
| 118 | |
| 119 | /* ---- Begin more 'specific' memory functions for cx_like products --- */ |
| 120 | |
| 121 | static void pcxem_memwinon(struct board_info *b, unsigned int win); |
| 122 | static void pcxem_memwinoff(struct board_info *b, unsigned int win); |
| 123 | static void pcxem_globalwinon(struct channel *ch); |
| 124 | static void pcxem_rxwinon(struct channel *ch); |
| 125 | static void pcxem_txwinon(struct channel *ch); |
| 126 | static void pcxem_memoff(struct channel *ch); |
| 127 | |
| 128 | /* ------ Begin more 'specific' memory functions for the pcxe ------- */ |
| 129 | |
| 130 | static void pcxe_memwinon(struct board_info *b, unsigned int win); |
| 131 | static void pcxe_memwinoff(struct board_info *b, unsigned int win); |
| 132 | static void pcxe_globalwinon(struct channel *ch); |
| 133 | static void pcxe_rxwinon(struct channel *ch); |
| 134 | static void pcxe_txwinon(struct channel *ch); |
| 135 | static void pcxe_memoff(struct channel *ch); |
| 136 | |
| 137 | /* ---- Begin more 'specific' memory functions for the pc64xe and pcxi ---- */ |
| 138 | /* Note : pc64xe and pcxi share the same windowing routines */ |
| 139 | |
| 140 | static void pcxi_memwinon(struct board_info *b, unsigned int win); |
| 141 | static void pcxi_memwinoff(struct board_info *b, unsigned int win); |
| 142 | static void pcxi_globalwinon(struct channel *ch); |
| 143 | static void pcxi_rxwinon(struct channel *ch); |
| 144 | static void pcxi_txwinon(struct channel *ch); |
| 145 | static void pcxi_memoff(struct channel *ch); |
| 146 | |
| 147 | /* - Begin 'specific' do nothing memory functions needed for some cards - */ |
| 148 | |
| 149 | static void dummy_memwinon(struct board_info *b, unsigned int win); |
| 150 | static void dummy_memwinoff(struct board_info *b, unsigned int win); |
| 151 | static void dummy_globalwinon(struct channel *ch); |
| 152 | static void dummy_rxwinon(struct channel *ch); |
| 153 | static void dummy_txwinon(struct channel *ch); |
| 154 | static void dummy_memoff(struct channel *ch); |
| 155 | static void dummy_assertgwinon(struct channel *ch); |
| 156 | static void dummy_assertmemoff(struct channel *ch); |
| 157 | |
| 158 | static struct channel *verifyChannel(struct tty_struct *); |
| 159 | static void pc_sched_event(struct channel *, int); |
| 160 | static void epca_error(int, char *); |
| 161 | static void pc_close(struct tty_struct *, struct file *); |
| 162 | static void shutdown(struct channel *, struct tty_struct *tty); |
| 163 | static void pc_hangup(struct tty_struct *); |
| 164 | static int pc_write_room(struct tty_struct *); |
| 165 | static int pc_chars_in_buffer(struct tty_struct *); |
| 166 | static void pc_flush_buffer(struct tty_struct *); |
| 167 | static void pc_flush_chars(struct tty_struct *); |
| 168 | static int pc_open(struct tty_struct *, struct file *); |
| 169 | static void post_fep_init(unsigned int crd); |
| 170 | static void epcapoll(unsigned long); |
| 171 | static void doevent(int); |
| 172 | static void fepcmd(struct channel *, int, int, int, int, int); |
| 173 | static unsigned termios2digi_h(struct channel *ch, unsigned); |
| 174 | static unsigned termios2digi_i(struct channel *ch, unsigned); |
| 175 | static unsigned termios2digi_c(struct channel *ch, unsigned); |
| 176 | static void epcaparam(struct tty_struct *, struct channel *); |
| 177 | static void receive_data(struct channel *, struct tty_struct *tty); |
| 178 | static int pc_ioctl(struct tty_struct *, struct file *, |
| 179 | unsigned int, unsigned long); |
| 180 | static int info_ioctl(struct tty_struct *, struct file *, |
| 181 | unsigned int, unsigned long); |
| 182 | static void pc_set_termios(struct tty_struct *, struct ktermios *); |
| 183 | static void do_softint(struct work_struct *work); |
| 184 | static void pc_stop(struct tty_struct *); |
| 185 | static void pc_start(struct tty_struct *); |
| 186 | static void pc_throttle(struct tty_struct *tty); |
| 187 | static void pc_unthrottle(struct tty_struct *tty); |
| 188 | static int pc_send_break(struct tty_struct *tty, int msec); |
| 189 | static void setup_empty_event(struct tty_struct *tty, struct channel *ch); |
| 190 | |
| 191 | static int pc_write(struct tty_struct *, const unsigned char *, int); |
| 192 | static int pc_init(void); |
| 193 | static int init_PCI(void); |
| 194 | |
| 195 | /* |
| 196 | * Table of functions for each board to handle memory. Mantaining parallelism |
| 197 | * is a *very* good idea here. The idea is for the runtime code to blindly call |
| 198 | * these functions, not knowing/caring about the underlying hardware. This |
| 199 | * stuff should contain no conditionals; if more functionality is needed a |
| 200 | * different entry should be established. These calls are the interface calls |
| 201 | * and are the only functions that should be accessed. Anyone caught making |
| 202 | * direct calls deserves what they get. |
| 203 | */ |
| 204 | static void memwinon(struct board_info *b, unsigned int win) |
| 205 | { |
| 206 | b->memwinon(b, win); |
| 207 | } |
| 208 | |
| 209 | static void memwinoff(struct board_info *b, unsigned int win) |
| 210 | { |
| 211 | b->memwinoff(b, win); |
| 212 | } |
| 213 | |
| 214 | static void globalwinon(struct channel *ch) |
| 215 | { |
| 216 | ch->board->globalwinon(ch); |
| 217 | } |
| 218 | |
| 219 | static void rxwinon(struct channel *ch) |
| 220 | { |
| 221 | ch->board->rxwinon(ch); |
| 222 | } |
| 223 | |
| 224 | static void txwinon(struct channel *ch) |
| 225 | { |
| 226 | ch->board->txwinon(ch); |
| 227 | } |
| 228 | |
| 229 | static void memoff(struct channel *ch) |
| 230 | { |
| 231 | ch->board->memoff(ch); |
| 232 | } |
| 233 | static void assertgwinon(struct channel *ch) |
| 234 | { |
| 235 | ch->board->assertgwinon(ch); |
| 236 | } |
| 237 | |
| 238 | static void assertmemoff(struct channel *ch) |
| 239 | { |
| 240 | ch->board->assertmemoff(ch); |
| 241 | } |
| 242 | |
| 243 | /* PCXEM windowing is the same as that used in the PCXR and CX series cards. */ |
| 244 | static void pcxem_memwinon(struct board_info *b, unsigned int win) |
| 245 | { |
| 246 | outb_p(FEPWIN | win, b->port + 1); |
| 247 | } |
| 248 | |
| 249 | static void pcxem_memwinoff(struct board_info *b, unsigned int win) |
| 250 | { |
| 251 | outb_p(0, b->port + 1); |
| 252 | } |
| 253 | |
| 254 | static void pcxem_globalwinon(struct channel *ch) |
| 255 | { |
| 256 | outb_p(FEPWIN, (int)ch->board->port + 1); |
| 257 | } |
| 258 | |
| 259 | static void pcxem_rxwinon(struct channel *ch) |
| 260 | { |
| 261 | outb_p(ch->rxwin, (int)ch->board->port + 1); |
| 262 | } |
| 263 | |
| 264 | static void pcxem_txwinon(struct channel *ch) |
| 265 | { |
| 266 | outb_p(ch->txwin, (int)ch->board->port + 1); |
| 267 | } |
| 268 | |
| 269 | static void pcxem_memoff(struct channel *ch) |
| 270 | { |
| 271 | outb_p(0, (int)ch->board->port + 1); |
| 272 | } |
| 273 | |
| 274 | /* ----------------- Begin pcxe memory window stuff ------------------ */ |
| 275 | static void pcxe_memwinon(struct board_info *b, unsigned int win) |
| 276 | { |
| 277 | outb_p(FEPWIN | win, b->port + 1); |
| 278 | } |
| 279 | |
| 280 | static void pcxe_memwinoff(struct board_info *b, unsigned int win) |
| 281 | { |
| 282 | outb_p(inb(b->port) & ~FEPMEM, b->port + 1); |
| 283 | outb_p(0, b->port + 1); |
| 284 | } |
| 285 | |
| 286 | static void pcxe_globalwinon(struct channel *ch) |
| 287 | { |
| 288 | outb_p(FEPWIN, (int)ch->board->port + 1); |
| 289 | } |
| 290 | |
| 291 | static void pcxe_rxwinon(struct channel *ch) |
| 292 | { |
| 293 | outb_p(ch->rxwin, (int)ch->board->port + 1); |
| 294 | } |
| 295 | |
| 296 | static void pcxe_txwinon(struct channel *ch) |
| 297 | { |
| 298 | outb_p(ch->txwin, (int)ch->board->port + 1); |
| 299 | } |
| 300 | |
| 301 | static void pcxe_memoff(struct channel *ch) |
| 302 | { |
| 303 | outb_p(0, (int)ch->board->port); |
| 304 | outb_p(0, (int)ch->board->port + 1); |
| 305 | } |
| 306 | |
| 307 | /* ------------- Begin pc64xe and pcxi memory window stuff -------------- */ |
| 308 | static void pcxi_memwinon(struct board_info *b, unsigned int win) |
| 309 | { |
| 310 | outb_p(inb(b->port) | FEPMEM, b->port); |
| 311 | } |
| 312 | |
| 313 | static void pcxi_memwinoff(struct board_info *b, unsigned int win) |
| 314 | { |
| 315 | outb_p(inb(b->port) & ~FEPMEM, b->port); |
| 316 | } |
| 317 | |
| 318 | static void pcxi_globalwinon(struct channel *ch) |
| 319 | { |
| 320 | outb_p(FEPMEM, ch->board->port); |
| 321 | } |
| 322 | |
| 323 | static void pcxi_rxwinon(struct channel *ch) |
| 324 | { |
| 325 | outb_p(FEPMEM, ch->board->port); |
| 326 | } |
| 327 | |
| 328 | static void pcxi_txwinon(struct channel *ch) |
| 329 | { |
| 330 | outb_p(FEPMEM, ch->board->port); |
| 331 | } |
| 332 | |
| 333 | static void pcxi_memoff(struct channel *ch) |
| 334 | { |
| 335 | outb_p(0, ch->board->port); |
| 336 | } |
| 337 | |
| 338 | static void pcxi_assertgwinon(struct channel *ch) |
| 339 | { |
| 340 | epcaassert(inb(ch->board->port) & FEPMEM, "Global memory off"); |
| 341 | } |
| 342 | |
| 343 | static void pcxi_assertmemoff(struct channel *ch) |
| 344 | { |
| 345 | epcaassert(!(inb(ch->board->port) & FEPMEM), "Memory on"); |
| 346 | } |
| 347 | |
| 348 | /* |
| 349 | * Not all of the cards need specific memory windowing routines. Some cards |
| 350 | * (Such as PCI) needs no windowing routines at all. We provide these do |
| 351 | * nothing routines so that the same code base can be used. The driver will |
| 352 | * ALWAYS call a windowing routine if it thinks it needs to; regardless of the |
| 353 | * card. However, dependent on the card the routine may or may not do anything. |
| 354 | */ |
| 355 | static void dummy_memwinon(struct board_info *b, unsigned int win) |
| 356 | { |
| 357 | } |
| 358 | |
| 359 | static void dummy_memwinoff(struct board_info *b, unsigned int win) |
| 360 | { |
| 361 | } |
| 362 | |
| 363 | static void dummy_globalwinon(struct channel *ch) |
| 364 | { |
| 365 | } |
| 366 | |
| 367 | static void dummy_rxwinon(struct channel *ch) |
| 368 | { |
| 369 | } |
| 370 | |
| 371 | static void dummy_txwinon(struct channel *ch) |
| 372 | { |
| 373 | } |
| 374 | |
| 375 | static void dummy_memoff(struct channel *ch) |
| 376 | { |
| 377 | } |
| 378 | |
| 379 | static void dummy_assertgwinon(struct channel *ch) |
| 380 | { |
| 381 | } |
| 382 | |
| 383 | static void dummy_assertmemoff(struct channel *ch) |
| 384 | { |
| 385 | } |
| 386 | |
| 387 | static struct channel *verifyChannel(struct tty_struct *tty) |
| 388 | { |
| 389 | /* |
| 390 | * This routine basically provides a sanity check. It insures that the |
| 391 | * channel returned is within the proper range of addresses as well as |
| 392 | * properly initialized. If some bogus info gets passed in |
| 393 | * through tty->driver_data this should catch it. |
| 394 | */ |
| 395 | if (tty) { |
| 396 | struct channel *ch = tty->driver_data; |
| 397 | if (ch >= &digi_channels[0] && ch < &digi_channels[nbdevs]) { |
| 398 | if (ch->magic == EPCA_MAGIC) |
| 399 | return ch; |
| 400 | } |
| 401 | } |
| 402 | return NULL; |
| 403 | } |
| 404 | |
| 405 | static void pc_sched_event(struct channel *ch, int event) |
| 406 | { |
| 407 | /* |
| 408 | * We call this to schedule interrupt processing on some event. The |
| 409 | * kernel sees our request and calls the related routine in OUR driver. |
| 410 | */ |
| 411 | ch->event |= 1 << event; |
| 412 | schedule_work(&ch->tqueue); |
| 413 | } |
| 414 | |
| 415 | static void epca_error(int line, char *msg) |
| 416 | { |
| 417 | printk(KERN_ERR "epca_error (Digi): line = %d %s\n", line, msg); |
| 418 | } |
| 419 | |
| 420 | static void pc_close(struct tty_struct *tty, struct file *filp) |
| 421 | { |
| 422 | struct channel *ch; |
| 423 | struct tty_port *port; |
| 424 | /* |
| 425 | * verifyChannel returns the channel from the tty struct if it is |
| 426 | * valid. This serves as a sanity check. |
| 427 | */ |
| 428 | ch = verifyChannel(tty); |
| 429 | if (ch == NULL) |
| 430 | return; |
| 431 | port = &ch->port; |
| 432 | |
| 433 | if (tty_port_close_start(port, tty, filp) == 0) |
| 434 | return; |
| 435 | |
| 436 | pc_flush_buffer(tty); |
| 437 | shutdown(ch, tty); |
| 438 | |
| 439 | tty_port_close_end(port, tty); |
| 440 | ch->event = 0; /* FIXME: review ch->event locking */ |
| 441 | tty_port_tty_set(port, NULL); |
| 442 | } |
| 443 | |
| 444 | static void shutdown(struct channel *ch, struct tty_struct *tty) |
| 445 | { |
| 446 | unsigned long flags; |
| 447 | struct board_chan __iomem *bc; |
| 448 | struct tty_port *port = &ch->port; |
| 449 | |
| 450 | if (!(port->flags & ASYNC_INITIALIZED)) |
| 451 | return; |
| 452 | |
| 453 | spin_lock_irqsave(&epca_lock, flags); |
| 454 | |
| 455 | globalwinon(ch); |
| 456 | bc = ch->brdchan; |
| 457 | |
| 458 | /* |
| 459 | * In order for an event to be generated on the receipt of data the |
| 460 | * idata flag must be set. Since we are shutting down, this is not |
| 461 | * necessary clear this flag. |
| 462 | */ |
| 463 | if (bc) |
| 464 | writeb(0, &bc->idata); |
| 465 | |
| 466 | /* If we're a modem control device and HUPCL is on, drop RTS & DTR. */ |
| 467 | if (tty->termios->c_cflag & HUPCL) { |
| 468 | ch->omodem &= ~(ch->m_rts | ch->m_dtr); |
| 469 | fepcmd(ch, SETMODEM, 0, ch->m_dtr | ch->m_rts, 10, 1); |
| 470 | } |
| 471 | memoff(ch); |
| 472 | |
| 473 | /* |
| 474 | * The channel has officialy been closed. The next time it is opened it |
| 475 | * will have to reinitialized. Set a flag to indicate this. |
| 476 | */ |
| 477 | /* Prevent future Digi programmed interrupts from coming active */ |
| 478 | port->flags &= ~ASYNC_INITIALIZED; |
| 479 | spin_unlock_irqrestore(&epca_lock, flags); |
| 480 | } |
| 481 | |
| 482 | static void pc_hangup(struct tty_struct *tty) |
| 483 | { |
| 484 | struct channel *ch; |
| 485 | |
| 486 | /* |
| 487 | * verifyChannel returns the channel from the tty struct if it is |
| 488 | * valid. This serves as a sanity check. |
| 489 | */ |
| 490 | ch = verifyChannel(tty); |
| 491 | if (ch != NULL) { |
| 492 | pc_flush_buffer(tty); |
| 493 | tty_ldisc_flush(tty); |
| 494 | shutdown(ch, tty); |
| 495 | |
| 496 | ch->event = 0; /* FIXME: review locking of ch->event */ |
| 497 | tty_port_hangup(&ch->port); |
| 498 | } |
| 499 | } |
| 500 | |
| 501 | static int pc_write(struct tty_struct *tty, |
| 502 | const unsigned char *buf, int bytesAvailable) |
| 503 | { |
| 504 | unsigned int head, tail; |
| 505 | int dataLen; |
| 506 | int size; |
| 507 | int amountCopied; |
| 508 | struct channel *ch; |
| 509 | unsigned long flags; |
| 510 | int remain; |
| 511 | struct board_chan __iomem *bc; |
| 512 | |
| 513 | /* |
| 514 | * pc_write is primarily called directly by the kernel routine |
| 515 | * tty_write (Though it can also be called by put_char) found in |
| 516 | * tty_io.c. pc_write is passed a line discipline buffer where the data |
| 517 | * to be written out is stored. The line discipline implementation |
| 518 | * itself is done at the kernel level and is not brought into the |
| 519 | * driver. |
| 520 | */ |
| 521 | |
| 522 | /* |
| 523 | * verifyChannel returns the channel from the tty struct if it is |
| 524 | * valid. This serves as a sanity check. |
| 525 | */ |
| 526 | ch = verifyChannel(tty); |
| 527 | if (ch == NULL) |
| 528 | return 0; |
| 529 | |
| 530 | /* Make a pointer to the channel data structure found on the board. */ |
| 531 | bc = ch->brdchan; |
| 532 | size = ch->txbufsize; |
| 533 | amountCopied = 0; |
| 534 | |
| 535 | spin_lock_irqsave(&epca_lock, flags); |
| 536 | globalwinon(ch); |
| 537 | |
| 538 | head = readw(&bc->tin) & (size - 1); |
| 539 | tail = readw(&bc->tout); |
| 540 | |
| 541 | if (tail != readw(&bc->tout)) |
| 542 | tail = readw(&bc->tout); |
| 543 | tail &= (size - 1); |
| 544 | |
| 545 | if (head >= tail) { |
| 546 | /* head has not wrapped */ |
| 547 | /* |
| 548 | * remain (much like dataLen above) represents the total amount |
| 549 | * of space available on the card for data. Here dataLen |
| 550 | * represents the space existing between the head pointer and |
| 551 | * the end of buffer. This is important because a memcpy cannot |
| 552 | * be told to automatically wrap around when it hits the buffer |
| 553 | * end. |
| 554 | */ |
| 555 | dataLen = size - head; |
| 556 | remain = size - (head - tail) - 1; |
| 557 | } else { |
| 558 | /* head has wrapped around */ |
| 559 | remain = tail - head - 1; |
| 560 | dataLen = remain; |
| 561 | } |
| 562 | /* |
| 563 | * Check the space on the card. If we have more data than space; reduce |
| 564 | * the amount of data to fit the space. |
| 565 | */ |
| 566 | bytesAvailable = min(remain, bytesAvailable); |
| 567 | txwinon(ch); |
| 568 | while (bytesAvailable > 0) { |
| 569 | /* there is data to copy onto card */ |
| 570 | |
| 571 | /* |
| 572 | * If head is not wrapped, the below will make sure the first |
| 573 | * data copy fills to the end of card buffer. |
| 574 | */ |
| 575 | dataLen = min(bytesAvailable, dataLen); |
| 576 | memcpy_toio(ch->txptr + head, buf, dataLen); |
| 577 | buf += dataLen; |
| 578 | head += dataLen; |
| 579 | amountCopied += dataLen; |
| 580 | bytesAvailable -= dataLen; |
| 581 | |
| 582 | if (head >= size) { |
| 583 | head = 0; |
| 584 | dataLen = tail; |
| 585 | } |
| 586 | } |
| 587 | ch->statusflags |= TXBUSY; |
| 588 | globalwinon(ch); |
| 589 | writew(head, &bc->tin); |
| 590 | |
| 591 | if ((ch->statusflags & LOWWAIT) == 0) { |
| 592 | ch->statusflags |= LOWWAIT; |
| 593 | writeb(1, &bc->ilow); |
| 594 | } |
| 595 | memoff(ch); |
| 596 | spin_unlock_irqrestore(&epca_lock, flags); |
| 597 | return amountCopied; |
| 598 | } |
| 599 | |
| 600 | static int pc_write_room(struct tty_struct *tty) |
| 601 | { |
| 602 | int remain = 0; |
| 603 | struct channel *ch; |
| 604 | unsigned long flags; |
| 605 | unsigned int head, tail; |
| 606 | struct board_chan __iomem *bc; |
| 607 | /* |
| 608 | * verifyChannel returns the channel from the tty struct if it is |
| 609 | * valid. This serves as a sanity check. |
| 610 | */ |
| 611 | ch = verifyChannel(tty); |
| 612 | if (ch != NULL) { |
| 613 | spin_lock_irqsave(&epca_lock, flags); |
| 614 | globalwinon(ch); |
| 615 | |
| 616 | bc = ch->brdchan; |
| 617 | head = readw(&bc->tin) & (ch->txbufsize - 1); |
| 618 | tail = readw(&bc->tout); |
| 619 | |
| 620 | if (tail != readw(&bc->tout)) |
| 621 | tail = readw(&bc->tout); |
| 622 | /* Wrap tail if necessary */ |
| 623 | tail &= (ch->txbufsize - 1); |
| 624 | remain = tail - head - 1; |
| 625 | if (remain < 0) |
| 626 | remain += ch->txbufsize; |
| 627 | |
| 628 | if (remain && (ch->statusflags & LOWWAIT) == 0) { |
| 629 | ch->statusflags |= LOWWAIT; |
| 630 | writeb(1, &bc->ilow); |
| 631 | } |
| 632 | memoff(ch); |
| 633 | spin_unlock_irqrestore(&epca_lock, flags); |
| 634 | } |
| 635 | /* Return how much room is left on card */ |
| 636 | return remain; |
| 637 | } |
| 638 | |
| 639 | static int pc_chars_in_buffer(struct tty_struct *tty) |
| 640 | { |
| 641 | int chars; |
| 642 | unsigned int ctail, head, tail; |
| 643 | int remain; |
| 644 | unsigned long flags; |
| 645 | struct channel *ch; |
| 646 | struct board_chan __iomem *bc; |
| 647 | /* |
| 648 | * verifyChannel returns the channel from the tty struct if it is |
| 649 | * valid. This serves as a sanity check. |
| 650 | */ |
| 651 | ch = verifyChannel(tty); |
| 652 | if (ch == NULL) |
| 653 | return 0; |
| 654 | |
| 655 | spin_lock_irqsave(&epca_lock, flags); |
| 656 | globalwinon(ch); |
| 657 | |
| 658 | bc = ch->brdchan; |
| 659 | tail = readw(&bc->tout); |
| 660 | head = readw(&bc->tin); |
| 661 | ctail = readw(&ch->mailbox->cout); |
| 662 | |
| 663 | if (tail == head && readw(&ch->mailbox->cin) == ctail && |
| 664 | readb(&bc->tbusy) == 0) |
| 665 | chars = 0; |
| 666 | else { /* Begin if some space on the card has been used */ |
| 667 | head = readw(&bc->tin) & (ch->txbufsize - 1); |
| 668 | tail &= (ch->txbufsize - 1); |
| 669 | /* |
| 670 | * The logic here is basically opposite of the above |
| 671 | * pc_write_room here we are finding the amount of bytes in the |
| 672 | * buffer filled. Not the amount of bytes empty. |
| 673 | */ |
| 674 | remain = tail - head - 1; |
| 675 | if (remain < 0) |
| 676 | remain += ch->txbufsize; |
| 677 | chars = (int)(ch->txbufsize - remain); |
| 678 | /* |
| 679 | * Make it possible to wakeup anything waiting for output in |
| 680 | * tty_ioctl.c, etc. |
| 681 | * |
| 682 | * If not already set. Setup an event to indicate when the |
| 683 | * transmit buffer empties. |
| 684 | */ |
| 685 | if (!(ch->statusflags & EMPTYWAIT)) |
| 686 | setup_empty_event(tty, ch); |
| 687 | } /* End if some space on the card has been used */ |
| 688 | memoff(ch); |
| 689 | spin_unlock_irqrestore(&epca_lock, flags); |
| 690 | /* Return number of characters residing on card. */ |
| 691 | return chars; |
| 692 | } |
| 693 | |
| 694 | static void pc_flush_buffer(struct tty_struct *tty) |
| 695 | { |
| 696 | unsigned int tail; |
| 697 | unsigned long flags; |
| 698 | struct channel *ch; |
| 699 | struct board_chan __iomem *bc; |
| 700 | /* |
| 701 | * verifyChannel returns the channel from the tty struct if it is |
| 702 | * valid. This serves as a sanity check. |
| 703 | */ |
| 704 | ch = verifyChannel(tty); |
| 705 | if (ch == NULL) |
| 706 | return; |
| 707 | |
| 708 | spin_lock_irqsave(&epca_lock, flags); |
| 709 | globalwinon(ch); |
| 710 | bc = ch->brdchan; |
| 711 | tail = readw(&bc->tout); |
| 712 | /* Have FEP move tout pointer; effectively flushing transmit buffer */ |
| 713 | fepcmd(ch, STOUT, (unsigned) tail, 0, 0, 0); |
| 714 | memoff(ch); |
| 715 | spin_unlock_irqrestore(&epca_lock, flags); |
| 716 | tty_wakeup(tty); |
| 717 | } |
| 718 | |
| 719 | static void pc_flush_chars(struct tty_struct *tty) |
| 720 | { |
| 721 | struct channel *ch; |
| 722 | /* |
| 723 | * verifyChannel returns the channel from the tty struct if it is |
| 724 | * valid. This serves as a sanity check. |
| 725 | */ |
| 726 | ch = verifyChannel(tty); |
| 727 | if (ch != NULL) { |
| 728 | unsigned long flags; |
| 729 | spin_lock_irqsave(&epca_lock, flags); |
| 730 | /* |
| 731 | * If not already set and the transmitter is busy setup an |
| 732 | * event to indicate when the transmit empties. |
| 733 | */ |
| 734 | if ((ch->statusflags & TXBUSY) && |
| 735 | !(ch->statusflags & EMPTYWAIT)) |
| 736 | setup_empty_event(tty, ch); |
| 737 | spin_unlock_irqrestore(&epca_lock, flags); |
| 738 | } |
| 739 | } |
| 740 | |
| 741 | static int epca_carrier_raised(struct tty_port *port) |
| 742 | { |
| 743 | struct channel *ch = container_of(port, struct channel, port); |
| 744 | if (ch->imodem & ch->dcd) |
| 745 | return 1; |
| 746 | return 0; |
| 747 | } |
| 748 | |
| 749 | static void epca_dtr_rts(struct tty_port *port, int onoff) |
| 750 | { |
| 751 | } |
| 752 | |
| 753 | static int pc_open(struct tty_struct *tty, struct file *filp) |
| 754 | { |
| 755 | struct channel *ch; |
| 756 | struct tty_port *port; |
| 757 | unsigned long flags; |
| 758 | int line, retval, boardnum; |
| 759 | struct board_chan __iomem *bc; |
| 760 | unsigned int head; |
| 761 | |
| 762 | line = tty->index; |
| 763 | if (line < 0 || line >= nbdevs) |
| 764 | return -ENODEV; |
| 765 | |
| 766 | ch = &digi_channels[line]; |
| 767 | port = &ch->port; |
| 768 | boardnum = ch->boardnum; |
| 769 | |
| 770 | /* Check status of board configured in system. */ |
| 771 | |
| 772 | /* |
| 773 | * I check to see if the epca_setup routine detected a user error. It |
| 774 | * might be better to put this in pc_init, but for the moment it goes |
| 775 | * here. |
| 776 | */ |
| 777 | if (invalid_lilo_config) { |
| 778 | if (setup_error_code & INVALID_BOARD_TYPE) |
| 779 | printk(KERN_ERR "epca: pc_open: Invalid board type specified in kernel options.\n"); |
| 780 | if (setup_error_code & INVALID_NUM_PORTS) |
| 781 | printk(KERN_ERR "epca: pc_open: Invalid number of ports specified in kernel options.\n"); |
| 782 | if (setup_error_code & INVALID_MEM_BASE) |
| 783 | printk(KERN_ERR "epca: pc_open: Invalid board memory address specified in kernel options.\n"); |
| 784 | if (setup_error_code & INVALID_PORT_BASE) |
| 785 | printk(KERN_ERR "epca; pc_open: Invalid board port address specified in kernel options.\n"); |
| 786 | if (setup_error_code & INVALID_BOARD_STATUS) |
| 787 | printk(KERN_ERR "epca: pc_open: Invalid board status specified in kernel options.\n"); |
| 788 | if (setup_error_code & INVALID_ALTPIN) |
| 789 | printk(KERN_ERR "epca: pc_open: Invalid board altpin specified in kernel options;\n"); |
| 790 | tty->driver_data = NULL; /* Mark this device as 'down' */ |
| 791 | return -ENODEV; |
| 792 | } |
| 793 | if (boardnum >= num_cards || boards[boardnum].status == DISABLED) { |
| 794 | tty->driver_data = NULL; /* Mark this device as 'down' */ |
| 795 | return(-ENODEV); |
| 796 | } |
| 797 | |
| 798 | bc = ch->brdchan; |
| 799 | if (bc == NULL) { |
| 800 | tty->driver_data = NULL; |
| 801 | return -ENODEV; |
| 802 | } |
| 803 | |
| 804 | spin_lock_irqsave(&port->lock, flags); |
| 805 | /* |
| 806 | * Every time a channel is opened, increment a counter. This is |
| 807 | * necessary because we do not wish to flush and shutdown the channel |
| 808 | * until the last app holding the channel open, closes it. |
| 809 | */ |
| 810 | port->count++; |
| 811 | /* |
| 812 | * Set a kernel structures pointer to our local channel structure. This |
| 813 | * way we can get to it when passed only a tty struct. |
| 814 | */ |
| 815 | tty->driver_data = ch; |
| 816 | port->tty = tty; |
| 817 | /* |
| 818 | * If this is the first time the channel has been opened, initialize |
| 819 | * the tty->termios struct otherwise let pc_close handle it. |
| 820 | */ |
| 821 | spin_lock(&epca_lock); |
| 822 | globalwinon(ch); |
| 823 | ch->statusflags = 0; |
| 824 | |
| 825 | /* Save boards current modem status */ |
| 826 | ch->imodem = readb(&bc->mstat); |
| 827 | |
| 828 | /* |
| 829 | * Set receive head and tail ptrs to each other. This indicates no data |
| 830 | * available to read. |
| 831 | */ |
| 832 | head = readw(&bc->rin); |
| 833 | writew(head, &bc->rout); |
| 834 | |
| 835 | /* Set the channels associated tty structure */ |
| 836 | |
| 837 | /* |
| 838 | * The below routine generally sets up parity, baud, flow control |
| 839 | * issues, etc.... It effect both control flags and input flags. |
| 840 | */ |
| 841 | epcaparam(tty, ch); |
| 842 | memoff(ch); |
| 843 | spin_unlock(&epca_lock); |
| 844 | port->flags |= ASYNC_INITIALIZED; |
| 845 | spin_unlock_irqrestore(&port->lock, flags); |
| 846 | |
| 847 | retval = tty_port_block_til_ready(port, tty, filp); |
| 848 | if (retval) |
| 849 | return retval; |
| 850 | /* |
| 851 | * Set this again in case a hangup set it to zero while this open() was |
| 852 | * waiting for the line... |
| 853 | */ |
| 854 | spin_lock_irqsave(&port->lock, flags); |
| 855 | port->tty = tty; |
| 856 | spin_lock(&epca_lock); |
| 857 | globalwinon(ch); |
| 858 | /* Enable Digi Data events */ |
| 859 | writeb(1, &bc->idata); |
| 860 | memoff(ch); |
| 861 | spin_unlock(&epca_lock); |
| 862 | spin_unlock_irqrestore(&port->lock, flags); |
| 863 | return 0; |
| 864 | } |
| 865 | |
| 866 | static int __init epca_module_init(void) |
| 867 | { |
| 868 | return pc_init(); |
| 869 | } |
| 870 | module_init(epca_module_init); |
| 871 | |
| 872 | static struct pci_driver epca_driver; |
| 873 | |
| 874 | static void __exit epca_module_exit(void) |
| 875 | { |
| 876 | int count, crd; |
| 877 | struct board_info *bd; |
| 878 | struct channel *ch; |
| 879 | |
| 880 | del_timer_sync(&epca_timer); |
| 881 | |
| 882 | if (tty_unregister_driver(pc_driver) || |
| 883 | tty_unregister_driver(pc_info)) { |
| 884 | printk(KERN_WARNING "epca: cleanup_module failed to un-register tty driver\n"); |
| 885 | return; |
| 886 | } |
| 887 | put_tty_driver(pc_driver); |
| 888 | put_tty_driver(pc_info); |
| 889 | |
| 890 | for (crd = 0; crd < num_cards; crd++) { |
| 891 | bd = &boards[crd]; |
| 892 | if (!bd) { /* sanity check */ |
| 893 | printk(KERN_ERR "<Error> - Digi : cleanup_module failed\n"); |
| 894 | return; |
| 895 | } |
| 896 | ch = card_ptr[crd]; |
| 897 | for (count = 0; count < bd->numports; count++, ch++) { |
| 898 | struct tty_struct *tty = tty_port_tty_get(&ch->port); |
| 899 | if (tty) { |
| 900 | tty_hangup(tty); |
| 901 | tty_kref_put(tty); |
| 902 | } |
| 903 | } |
| 904 | } |
| 905 | pci_unregister_driver(&epca_driver); |
| 906 | } |
| 907 | module_exit(epca_module_exit); |
| 908 | |
| 909 | static const struct tty_operations pc_ops = { |
| 910 | .open = pc_open, |
| 911 | .close = pc_close, |
| 912 | .write = pc_write, |
| 913 | .write_room = pc_write_room, |
| 914 | .flush_buffer = pc_flush_buffer, |
| 915 | .chars_in_buffer = pc_chars_in_buffer, |
| 916 | .flush_chars = pc_flush_chars, |
| 917 | .ioctl = pc_ioctl, |
| 918 | .set_termios = pc_set_termios, |
| 919 | .stop = pc_stop, |
| 920 | .start = pc_start, |
| 921 | .throttle = pc_throttle, |
| 922 | .unthrottle = pc_unthrottle, |
| 923 | .hangup = pc_hangup, |
| 924 | .break_ctl = pc_send_break |
| 925 | }; |
| 926 | |
| 927 | static const struct tty_port_operations epca_port_ops = { |
| 928 | .carrier_raised = epca_carrier_raised, |
| 929 | .dtr_rts = epca_dtr_rts, |
| 930 | }; |
| 931 | |
| 932 | static int info_open(struct tty_struct *tty, struct file *filp) |
| 933 | { |
| 934 | return 0; |
| 935 | } |
| 936 | |
| 937 | static struct tty_operations info_ops = { |
| 938 | .open = info_open, |
| 939 | .ioctl = info_ioctl, |
| 940 | }; |
| 941 | |
| 942 | static int __init pc_init(void) |
| 943 | { |
| 944 | int crd; |
| 945 | struct board_info *bd; |
| 946 | unsigned char board_id = 0; |
| 947 | int err = -ENOMEM; |
| 948 | |
| 949 | int pci_boards_found, pci_count; |
| 950 | |
| 951 | pci_count = 0; |
| 952 | |
| 953 | pc_driver = alloc_tty_driver(MAX_ALLOC); |
| 954 | if (!pc_driver) |
| 955 | goto out1; |
| 956 | |
| 957 | pc_info = alloc_tty_driver(MAX_ALLOC); |
| 958 | if (!pc_info) |
| 959 | goto out2; |
| 960 | |
| 961 | /* |
| 962 | * If epca_setup has not been ran by LILO set num_cards to defaults; |
| 963 | * copy board structure defined by digiConfig into drivers board |
| 964 | * structure. Note : If LILO has ran epca_setup then epca_setup will |
| 965 | * handle defining num_cards as well as copying the data into the board |
| 966 | * structure. |
| 967 | */ |
| 968 | if (!liloconfig) { |
| 969 | /* driver has been configured via. epcaconfig */ |
| 970 | nbdevs = NBDEVS; |
| 971 | num_cards = NUMCARDS; |
| 972 | memcpy(&boards, &static_boards, |
| 973 | sizeof(struct board_info) * NUMCARDS); |
| 974 | } |
| 975 | |
| 976 | /* |
| 977 | * Note : If lilo was used to configure the driver and the ignore |
| 978 | * epcaconfig option was choosen (digiepca=2) then nbdevs and num_cards |
| 979 | * will equal 0 at this point. This is okay; PCI cards will still be |
| 980 | * picked up if detected. |
| 981 | */ |
| 982 | |
| 983 | /* |
| 984 | * Set up interrupt, we will worry about memory allocation in |
| 985 | * post_fep_init. |
| 986 | */ |
| 987 | printk(KERN_INFO "DIGI epca driver version %s loaded.\n", VERSION); |
| 988 | |
| 989 | /* |
| 990 | * NOTE : This code assumes that the number of ports found in the |
| 991 | * boards array is correct. This could be wrong if the card in question |
| 992 | * is PCI (And therefore has no ports entry in the boards structure.) |
| 993 | * The rest of the information will be valid for PCI because the |
| 994 | * beginning of pc_init scans for PCI and determines i/o and base |
| 995 | * memory addresses. I am not sure if it is possible to read the number |
| 996 | * of ports supported by the card prior to it being booted (Since that |
| 997 | * is the state it is in when pc_init is run). Because it is not |
| 998 | * possible to query the number of supported ports until after the card |
| 999 | * has booted; we are required to calculate the card_ptrs as the card |
| 1000 | * is initialized (Inside post_fep_init). The negative thing about this |
| 1001 | * approach is that digiDload's call to GET_INFO will have a bad port |
| 1002 | * value. (Since this is called prior to post_fep_init.) |
| 1003 | */ |
| 1004 | pci_boards_found = 0; |
| 1005 | if (num_cards < MAXBOARDS) |
| 1006 | pci_boards_found += init_PCI(); |
| 1007 | num_cards += pci_boards_found; |
| 1008 | |
| 1009 | pc_driver->owner = THIS_MODULE; |
| 1010 | pc_driver->name = "ttyD"; |
| 1011 | pc_driver->major = DIGI_MAJOR; |
| 1012 | pc_driver->minor_start = 0; |
| 1013 | pc_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| 1014 | pc_driver->subtype = SERIAL_TYPE_NORMAL; |
| 1015 | pc_driver->init_termios = tty_std_termios; |
| 1016 | pc_driver->init_termios.c_iflag = 0; |
| 1017 | pc_driver->init_termios.c_oflag = 0; |
| 1018 | pc_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; |
| 1019 | pc_driver->init_termios.c_lflag = 0; |
| 1020 | pc_driver->init_termios.c_ispeed = 9600; |
| 1021 | pc_driver->init_termios.c_ospeed = 9600; |
| 1022 | pc_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_HARDWARE_BREAK; |
| 1023 | tty_set_operations(pc_driver, &pc_ops); |
| 1024 | |
| 1025 | pc_info->owner = THIS_MODULE; |
| 1026 | pc_info->name = "digi_ctl"; |
| 1027 | pc_info->major = DIGIINFOMAJOR; |
| 1028 | pc_info->minor_start = 0; |
| 1029 | pc_info->type = TTY_DRIVER_TYPE_SERIAL; |
| 1030 | pc_info->subtype = SERIAL_TYPE_INFO; |
| 1031 | pc_info->init_termios = tty_std_termios; |
| 1032 | pc_info->init_termios.c_iflag = 0; |
| 1033 | pc_info->init_termios.c_oflag = 0; |
| 1034 | pc_info->init_termios.c_lflag = 0; |
| 1035 | pc_info->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL; |
| 1036 | pc_info->init_termios.c_ispeed = 9600; |
| 1037 | pc_info->init_termios.c_ospeed = 9600; |
| 1038 | pc_info->flags = TTY_DRIVER_REAL_RAW; |
| 1039 | tty_set_operations(pc_info, &info_ops); |
| 1040 | |
| 1041 | |
| 1042 | for (crd = 0; crd < num_cards; crd++) { |
| 1043 | /* |
| 1044 | * This is where the appropriate memory handlers for the |
| 1045 | * hardware is set. Everything at runtime blindly jumps through |
| 1046 | * these vectors. |
| 1047 | */ |
| 1048 | |
| 1049 | /* defined in epcaconfig.h */ |
| 1050 | bd = &boards[crd]; |
| 1051 | |
| 1052 | switch (bd->type) { |
| 1053 | case PCXEM: |
| 1054 | case EISAXEM: |
| 1055 | bd->memwinon = pcxem_memwinon; |
| 1056 | bd->memwinoff = pcxem_memwinoff; |
| 1057 | bd->globalwinon = pcxem_globalwinon; |
| 1058 | bd->txwinon = pcxem_txwinon; |
| 1059 | bd->rxwinon = pcxem_rxwinon; |
| 1060 | bd->memoff = pcxem_memoff; |
| 1061 | bd->assertgwinon = dummy_assertgwinon; |
| 1062 | bd->assertmemoff = dummy_assertmemoff; |
| 1063 | break; |
| 1064 | |
| 1065 | case PCIXEM: |
| 1066 | case PCIXRJ: |
| 1067 | case PCIXR: |
| 1068 | bd->memwinon = dummy_memwinon; |
| 1069 | bd->memwinoff = dummy_memwinoff; |
| 1070 | bd->globalwinon = dummy_globalwinon; |
| 1071 | bd->txwinon = dummy_txwinon; |
| 1072 | bd->rxwinon = dummy_rxwinon; |
| 1073 | bd->memoff = dummy_memoff; |
| 1074 | bd->assertgwinon = dummy_assertgwinon; |
| 1075 | bd->assertmemoff = dummy_assertmemoff; |
| 1076 | break; |
| 1077 | |
| 1078 | case PCXE: |
| 1079 | case PCXEVE: |
| 1080 | bd->memwinon = pcxe_memwinon; |
| 1081 | bd->memwinoff = pcxe_memwinoff; |
| 1082 | bd->globalwinon = pcxe_globalwinon; |
| 1083 | bd->txwinon = pcxe_txwinon; |
| 1084 | bd->rxwinon = pcxe_rxwinon; |
| 1085 | bd->memoff = pcxe_memoff; |
| 1086 | bd->assertgwinon = dummy_assertgwinon; |
| 1087 | bd->assertmemoff = dummy_assertmemoff; |
| 1088 | break; |
| 1089 | |
| 1090 | case PCXI: |
| 1091 | case PC64XE: |
| 1092 | bd->memwinon = pcxi_memwinon; |
| 1093 | bd->memwinoff = pcxi_memwinoff; |
| 1094 | bd->globalwinon = pcxi_globalwinon; |
| 1095 | bd->txwinon = pcxi_txwinon; |
| 1096 | bd->rxwinon = pcxi_rxwinon; |
| 1097 | bd->memoff = pcxi_memoff; |
| 1098 | bd->assertgwinon = pcxi_assertgwinon; |
| 1099 | bd->assertmemoff = pcxi_assertmemoff; |
| 1100 | break; |
| 1101 | |
| 1102 | default: |
| 1103 | break; |
| 1104 | } |
| 1105 | |
| 1106 | /* |
| 1107 | * Some cards need a memory segment to be defined for use in |
| 1108 | * transmit and receive windowing operations. These boards are |
| 1109 | * listed in the below switch. In the case of the XI the amount |
| 1110 | * of memory on the board is variable so the memory_seg is also |
| 1111 | * variable. This code determines what they segment should be. |
| 1112 | */ |
| 1113 | switch (bd->type) { |
| 1114 | case PCXE: |
| 1115 | case PCXEVE: |
| 1116 | case PC64XE: |
| 1117 | bd->memory_seg = 0xf000; |
| 1118 | break; |
| 1119 | |
| 1120 | case PCXI: |
| 1121 | board_id = inb((int)bd->port); |
| 1122 | if ((board_id & 0x1) == 0x1) { |
| 1123 | /* it's an XI card */ |
| 1124 | /* Is it a 64K board */ |
| 1125 | if ((board_id & 0x30) == 0) |
| 1126 | bd->memory_seg = 0xf000; |
| 1127 | |
| 1128 | /* Is it a 128K board */ |
| 1129 | if ((board_id & 0x30) == 0x10) |
| 1130 | bd->memory_seg = 0xe000; |
| 1131 | |
| 1132 | /* Is is a 256K board */ |
| 1133 | if ((board_id & 0x30) == 0x20) |
| 1134 | bd->memory_seg = 0xc000; |
| 1135 | |
| 1136 | /* Is it a 512K board */ |
| 1137 | if ((board_id & 0x30) == 0x30) |
| 1138 | bd->memory_seg = 0x8000; |
| 1139 | } else |
| 1140 | printk(KERN_ERR "epca: Board at 0x%x doesn't appear to be an XI\n", (int)bd->port); |
| 1141 | break; |
| 1142 | } |
| 1143 | } |
| 1144 | |
| 1145 | err = tty_register_driver(pc_driver); |
| 1146 | if (err) { |
| 1147 | printk(KERN_ERR "Couldn't register Digi PC/ driver"); |
| 1148 | goto out3; |
| 1149 | } |
| 1150 | |
| 1151 | err = tty_register_driver(pc_info); |
| 1152 | if (err) { |
| 1153 | printk(KERN_ERR "Couldn't register Digi PC/ info "); |
| 1154 | goto out4; |
| 1155 | } |
| 1156 | |
| 1157 | /* Start up the poller to check for events on all enabled boards */ |
| 1158 | init_timer(&epca_timer); |
| 1159 | epca_timer.function = epcapoll; |
| 1160 | mod_timer(&epca_timer, jiffies + HZ/25); |
| 1161 | return 0; |
| 1162 | |
| 1163 | out4: |
| 1164 | tty_unregister_driver(pc_driver); |
| 1165 | out3: |
| 1166 | put_tty_driver(pc_info); |
| 1167 | out2: |
| 1168 | put_tty_driver(pc_driver); |
| 1169 | out1: |
| 1170 | return err; |
| 1171 | } |
| 1172 | |
| 1173 | static void post_fep_init(unsigned int crd) |
| 1174 | { |
| 1175 | int i; |
| 1176 | void __iomem *memaddr; |
| 1177 | struct global_data __iomem *gd; |
| 1178 | struct board_info *bd; |
| 1179 | struct board_chan __iomem *bc; |
| 1180 | struct channel *ch; |
| 1181 | int shrinkmem = 0, lowwater; |
| 1182 | |
| 1183 | /* |
| 1184 | * This call is made by the user via. the ioctl call DIGI_INIT. It is |
| 1185 | * responsible for setting up all the card specific stuff. |
| 1186 | */ |
| 1187 | bd = &boards[crd]; |
| 1188 | |
| 1189 | /* |
| 1190 | * If this is a PCI board, get the port info. Remember PCI cards do not |
| 1191 | * have entries into the epcaconfig.h file, so we can't get the number |
| 1192 | * of ports from it. Unfortunetly, this means that anyone doing a |
| 1193 | * DIGI_GETINFO before the board has booted will get an invalid number |
| 1194 | * of ports returned (It should return 0). Calls to DIGI_GETINFO after |
| 1195 | * DIGI_INIT has been called will return the proper values. |
| 1196 | */ |
| 1197 | if (bd->type >= PCIXEM) { /* Begin get PCI number of ports */ |
| 1198 | /* |
| 1199 | * Below we use XEMPORTS as a memory offset regardless of which |
| 1200 | * PCI card it is. This is because all of the supported PCI |
| 1201 | * cards have the same memory offset for the channel data. This |
| 1202 | * will have to be changed if we ever develop a PCI/XE card. |
| 1203 | * NOTE : The FEP manual states that the port offset is 0xC22 |
| 1204 | * as opposed to 0xC02. This is only true for PC/XE, and PC/XI |
| 1205 | * cards; not for the XEM, or CX series. On the PCI cards the |
| 1206 | * number of ports is determined by reading a ID PROM located |
| 1207 | * in the box attached to the card. The card can then determine |
| 1208 | * the index the id to determine the number of ports available. |
| 1209 | * (FYI - The id should be located at 0x1ac (And may use up to |
| 1210 | * 4 bytes if the box in question is a XEM or CX)). |
| 1211 | */ |
| 1212 | /* PCI cards are already remapped at this point ISA are not */ |
| 1213 | bd->numports = readw(bd->re_map_membase + XEMPORTS); |
| 1214 | epcaassert(bd->numports <= 64, "PCI returned a invalid number of ports"); |
| 1215 | nbdevs += (bd->numports); |
| 1216 | } else { |
| 1217 | /* Fix up the mappings for ISA/EISA etc */ |
| 1218 | /* FIXME: 64K - can we be smarter ? */ |
| 1219 | bd->re_map_membase = ioremap_nocache(bd->membase, 0x10000); |
| 1220 | } |
| 1221 | |
| 1222 | if (crd != 0) |
| 1223 | card_ptr[crd] = card_ptr[crd-1] + boards[crd-1].numports; |
| 1224 | else |
| 1225 | card_ptr[crd] = &digi_channels[crd]; /* <- For card 0 only */ |
| 1226 | |
| 1227 | ch = card_ptr[crd]; |
| 1228 | epcaassert(ch <= &digi_channels[nbdevs - 1], "ch out of range"); |
| 1229 | |
| 1230 | memaddr = bd->re_map_membase; |
| 1231 | |
| 1232 | /* |
| 1233 | * The below assignment will set bc to point at the BEGINING of the |
| 1234 | * cards channel structures. For 1 card there will be between 8 and 64 |
| 1235 | * of these structures. |
| 1236 | */ |
| 1237 | bc = memaddr + CHANSTRUCT; |
| 1238 | |
| 1239 | /* |
| 1240 | * The below assignment will set gd to point at the BEGINING of global |
| 1241 | * memory address 0xc00. The first data in that global memory actually |
| 1242 | * starts at address 0xc1a. The command in pointer begins at 0xd10. |
| 1243 | */ |
| 1244 | gd = memaddr + GLOBAL; |
| 1245 | |
| 1246 | /* |
| 1247 | * XEPORTS (address 0xc22) points at the number of channels the card |
| 1248 | * supports. (For 64XE, XI, XEM, and XR use 0xc02) |
| 1249 | */ |
| 1250 | if ((bd->type == PCXEVE || bd->type == PCXE) && |
| 1251 | (readw(memaddr + XEPORTS) < 3)) |
| 1252 | shrinkmem = 1; |
| 1253 | if (bd->type < PCIXEM) |
| 1254 | if (!request_region((int)bd->port, 4, board_desc[bd->type])) |
| 1255 | return; |
| 1256 | memwinon(bd, 0); |
| 1257 | |
| 1258 | /* |
| 1259 | * Remember ch is the main drivers channels structure, while bc is the |
| 1260 | * cards channel structure. |
| 1261 | */ |
| 1262 | for (i = 0; i < bd->numports; i++, ch++, bc++) { |
| 1263 | unsigned long flags; |
| 1264 | u16 tseg, rseg; |
| 1265 | |
| 1266 | tty_port_init(&ch->port); |
| 1267 | ch->port.ops = &epca_port_ops; |
| 1268 | ch->brdchan = bc; |
| 1269 | ch->mailbox = gd; |
| 1270 | INIT_WORK(&ch->tqueue, do_softint); |
| 1271 | ch->board = &boards[crd]; |
| 1272 | |
| 1273 | spin_lock_irqsave(&epca_lock, flags); |
| 1274 | switch (bd->type) { |
| 1275 | /* |
| 1276 | * Since some of the boards use different bitmaps for |
| 1277 | * their control signals we cannot hard code these |
| 1278 | * values and retain portability. We virtualize this |
| 1279 | * data here. |
| 1280 | */ |
| 1281 | case EISAXEM: |
| 1282 | case PCXEM: |
| 1283 | case PCIXEM: |
| 1284 | case PCIXRJ: |
| 1285 | case PCIXR: |
| 1286 | ch->m_rts = 0x02; |
| 1287 | ch->m_dcd = 0x80; |
| 1288 | ch->m_dsr = 0x20; |
| 1289 | ch->m_cts = 0x10; |
| 1290 | ch->m_ri = 0x40; |
| 1291 | ch->m_dtr = 0x01; |
| 1292 | break; |
| 1293 | |
| 1294 | case PCXE: |
| 1295 | case PCXEVE: |
| 1296 | case PCXI: |
| 1297 | case PC64XE: |
| 1298 | ch->m_rts = 0x02; |
| 1299 | ch->m_dcd = 0x08; |
| 1300 | ch->m_dsr = 0x10; |
| 1301 | ch->m_cts = 0x20; |
| 1302 | ch->m_ri = 0x40; |
| 1303 | ch->m_dtr = 0x80; |
| 1304 | break; |
| 1305 | } |
| 1306 | |
| 1307 | if (boards[crd].altpin) { |
| 1308 | ch->dsr = ch->m_dcd; |
| 1309 | ch->dcd = ch->m_dsr; |
| 1310 | ch->digiext.digi_flags |= DIGI_ALTPIN; |
| 1311 | } else { |
| 1312 | ch->dcd = ch->m_dcd; |
| 1313 | ch->dsr = ch->m_dsr; |
| 1314 | } |
| 1315 | |
| 1316 | ch->boardnum = crd; |
| 1317 | ch->channelnum = i; |
| 1318 | ch->magic = EPCA_MAGIC; |
| 1319 | tty_port_tty_set(&ch->port, NULL); |
| 1320 | |
| 1321 | if (shrinkmem) { |
| 1322 | fepcmd(ch, SETBUFFER, 32, 0, 0, 0); |
| 1323 | shrinkmem = 0; |
| 1324 | } |
| 1325 | |
| 1326 | tseg = readw(&bc->tseg); |
| 1327 | rseg = readw(&bc->rseg); |
| 1328 | |
| 1329 | switch (bd->type) { |
| 1330 | case PCIXEM: |
| 1331 | case PCIXRJ: |
| 1332 | case PCIXR: |
| 1333 | /* Cover all the 2MEG cards */ |
| 1334 | ch->txptr = memaddr + ((tseg << 4) & 0x1fffff); |
| 1335 | ch->rxptr = memaddr + ((rseg << 4) & 0x1fffff); |
| 1336 | ch->txwin = FEPWIN | (tseg >> 11); |
| 1337 | ch->rxwin = FEPWIN | (rseg >> 11); |
| 1338 | break; |
| 1339 | |
| 1340 | case PCXEM: |
| 1341 | case EISAXEM: |
| 1342 | /* Cover all the 32K windowed cards */ |
| 1343 | /* Mask equal to window size - 1 */ |
| 1344 | ch->txptr = memaddr + ((tseg << 4) & 0x7fff); |
| 1345 | ch->rxptr = memaddr + ((rseg << 4) & 0x7fff); |
| 1346 | ch->txwin = FEPWIN | (tseg >> 11); |
| 1347 | ch->rxwin = FEPWIN | (rseg >> 11); |
| 1348 | break; |
| 1349 | |
| 1350 | case PCXEVE: |
| 1351 | case PCXE: |
| 1352 | ch->txptr = memaddr + (((tseg - bd->memory_seg) << 4) |
| 1353 | & 0x1fff); |
| 1354 | ch->txwin = FEPWIN | ((tseg - bd->memory_seg) >> 9); |
| 1355 | ch->rxptr = memaddr + (((rseg - bd->memory_seg) << 4) |
| 1356 | & 0x1fff); |
| 1357 | ch->rxwin = FEPWIN | ((rseg - bd->memory_seg) >> 9); |
| 1358 | break; |
| 1359 | |
| 1360 | case PCXI: |
| 1361 | case PC64XE: |
| 1362 | ch->txptr = memaddr + ((tseg - bd->memory_seg) << 4); |
| 1363 | ch->rxptr = memaddr + ((rseg - bd->memory_seg) << 4); |
| 1364 | ch->txwin = ch->rxwin = 0; |
| 1365 | break; |
| 1366 | } |
| 1367 | |
| 1368 | ch->txbufhead = 0; |
| 1369 | ch->txbufsize = readw(&bc->tmax) + 1; |
| 1370 | |
| 1371 | ch->rxbufhead = 0; |
| 1372 | ch->rxbufsize = readw(&bc->rmax) + 1; |
| 1373 | |
| 1374 | lowwater = ch->txbufsize >= 2000 ? 1024 : (ch->txbufsize / 2); |
| 1375 | |
| 1376 | /* Set transmitter low water mark */ |
| 1377 | fepcmd(ch, STXLWATER, lowwater, 0, 10, 0); |
| 1378 | |
| 1379 | /* Set receiver low water mark */ |
| 1380 | fepcmd(ch, SRXLWATER, (ch->rxbufsize / 4), 0, 10, 0); |
| 1381 | |
| 1382 | /* Set receiver high water mark */ |
| 1383 | fepcmd(ch, SRXHWATER, (3 * ch->rxbufsize / 4), 0, 10, 0); |
| 1384 | |
| 1385 | writew(100, &bc->edelay); |
| 1386 | writeb(1, &bc->idata); |
| 1387 | |
| 1388 | ch->startc = readb(&bc->startc); |
| 1389 | ch->stopc = readb(&bc->stopc); |
| 1390 | ch->startca = readb(&bc->startca); |
| 1391 | ch->stopca = readb(&bc->stopca); |
| 1392 | |
| 1393 | ch->fepcflag = 0; |
| 1394 | ch->fepiflag = 0; |
| 1395 | ch->fepoflag = 0; |
| 1396 | ch->fepstartc = 0; |
| 1397 | ch->fepstopc = 0; |
| 1398 | ch->fepstartca = 0; |
| 1399 | ch->fepstopca = 0; |
| 1400 | |
| 1401 | ch->port.close_delay = 50; |
| 1402 | |
| 1403 | spin_unlock_irqrestore(&epca_lock, flags); |
| 1404 | } |
| 1405 | |
| 1406 | printk(KERN_INFO |
| 1407 | "Digi PC/Xx Driver V%s: %s I/O = 0x%lx Mem = 0x%lx Ports = %d\n", |
| 1408 | VERSION, board_desc[bd->type], (long)bd->port, |
| 1409 | (long)bd->membase, bd->numports); |
| 1410 | memwinoff(bd, 0); |
| 1411 | } |
| 1412 | |
| 1413 | static void epcapoll(unsigned long ignored) |
| 1414 | { |
| 1415 | unsigned long flags; |
| 1416 | int crd; |
| 1417 | unsigned int head, tail; |
| 1418 | struct channel *ch; |
| 1419 | struct board_info *bd; |
| 1420 | |
| 1421 | /* |
| 1422 | * This routine is called upon every timer interrupt. Even though the |
| 1423 | * Digi series cards are capable of generating interrupts this method |
| 1424 | * of non-looping polling is more efficient. This routine checks for |
| 1425 | * card generated events (Such as receive data, are transmit buffer |
| 1426 | * empty) and acts on those events. |
| 1427 | */ |
| 1428 | for (crd = 0; crd < num_cards; crd++) { |
| 1429 | bd = &boards[crd]; |
| 1430 | ch = card_ptr[crd]; |
| 1431 | |
| 1432 | if ((bd->status == DISABLED) || digi_poller_inhibited) |
| 1433 | continue; |
| 1434 | |
| 1435 | /* |
| 1436 | * assertmemoff is not needed here; indeed it is an empty |
| 1437 | * subroutine. It is being kept because future boards may need |
| 1438 | * this as well as some legacy boards. |
| 1439 | */ |
| 1440 | spin_lock_irqsave(&epca_lock, flags); |
| 1441 | |
| 1442 | assertmemoff(ch); |
| 1443 | |
| 1444 | globalwinon(ch); |
| 1445 | |
| 1446 | /* |
| 1447 | * In this case head and tail actually refer to the event queue |
| 1448 | * not the transmit or receive queue. |
| 1449 | */ |
| 1450 | head = readw(&ch->mailbox->ein); |
| 1451 | tail = readw(&ch->mailbox->eout); |
| 1452 | |
| 1453 | /* If head isn't equal to tail we have an event */ |
| 1454 | if (head != tail) |
| 1455 | doevent(crd); |
| 1456 | memoff(ch); |
| 1457 | |
| 1458 | spin_unlock_irqrestore(&epca_lock, flags); |
| 1459 | } /* End for each card */ |
| 1460 | mod_timer(&epca_timer, jiffies + (HZ / 25)); |
| 1461 | } |
| 1462 | |
| 1463 | static void doevent(int crd) |
| 1464 | { |
| 1465 | void __iomem *eventbuf; |
| 1466 | struct channel *ch, *chan0; |
| 1467 | static struct tty_struct *tty; |
| 1468 | struct board_info *bd; |
| 1469 | struct board_chan __iomem *bc; |
| 1470 | unsigned int tail, head; |
| 1471 | int event, channel; |
| 1472 | int mstat, lstat; |
| 1473 | |
| 1474 | /* |
| 1475 | * This subroutine is called by epcapoll when an event is detected |
| 1476 | * in the event queue. This routine responds to those events. |
| 1477 | */ |
| 1478 | bd = &boards[crd]; |
| 1479 | |
| 1480 | chan0 = card_ptr[crd]; |
| 1481 | epcaassert(chan0 <= &digi_channels[nbdevs - 1], "ch out of range"); |
| 1482 | assertgwinon(chan0); |
| 1483 | while ((tail = readw(&chan0->mailbox->eout)) != |
| 1484 | (head = readw(&chan0->mailbox->ein))) { |
| 1485 | /* Begin while something in event queue */ |
| 1486 | assertgwinon(chan0); |
| 1487 | eventbuf = bd->re_map_membase + tail + ISTART; |
| 1488 | /* Get the channel the event occurred on */ |
| 1489 | channel = readb(eventbuf); |
| 1490 | /* Get the actual event code that occurred */ |
| 1491 | event = readb(eventbuf + 1); |
| 1492 | /* |
| 1493 | * The two assignments below get the current modem status |
| 1494 | * (mstat) and the previous modem status (lstat). These are |
| 1495 | * useful becuase an event could signal a change in modem |
| 1496 | * signals itself. |
| 1497 | */ |
| 1498 | mstat = readb(eventbuf + 2); |
| 1499 | lstat = readb(eventbuf + 3); |
| 1500 | |
| 1501 | ch = chan0 + channel; |
| 1502 | if ((unsigned)channel >= bd->numports || !ch) { |
| 1503 | if (channel >= bd->numports) |
| 1504 | ch = chan0; |
| 1505 | bc = ch->brdchan; |
| 1506 | goto next; |
| 1507 | } |
| 1508 | |
| 1509 | bc = ch->brdchan; |
| 1510 | if (bc == NULL) |
| 1511 | goto next; |
| 1512 | |
| 1513 | tty = tty_port_tty_get(&ch->port); |
| 1514 | if (event & DATA_IND) { /* Begin DATA_IND */ |
| 1515 | receive_data(ch, tty); |
| 1516 | assertgwinon(ch); |
| 1517 | } /* End DATA_IND */ |
| 1518 | /* else *//* Fix for DCD transition missed bug */ |
| 1519 | if (event & MODEMCHG_IND) { |
| 1520 | /* A modem signal change has been indicated */ |
| 1521 | ch->imodem = mstat; |
| 1522 | if (test_bit(ASYNCB_CHECK_CD, &ch->port.flags)) { |
| 1523 | /* We are now receiving dcd */ |
| 1524 | if (mstat & ch->dcd) |
| 1525 | wake_up_interruptible(&ch->port.open_wait); |
| 1526 | else /* No dcd; hangup */ |
| 1527 | pc_sched_event(ch, EPCA_EVENT_HANGUP); |
| 1528 | } |
| 1529 | } |
| 1530 | if (tty) { |
| 1531 | if (event & BREAK_IND) { |
| 1532 | /* A break has been indicated */ |
| 1533 | tty_insert_flip_char(tty, 0, TTY_BREAK); |
| 1534 | tty_schedule_flip(tty); |
| 1535 | } else if (event & LOWTX_IND) { |
| 1536 | if (ch->statusflags & LOWWAIT) { |
| 1537 | ch->statusflags &= ~LOWWAIT; |
| 1538 | tty_wakeup(tty); |
| 1539 | } |
| 1540 | } else if (event & EMPTYTX_IND) { |
| 1541 | /* This event is generated by |
| 1542 | setup_empty_event */ |
| 1543 | ch->statusflags &= ~TXBUSY; |
| 1544 | if (ch->statusflags & EMPTYWAIT) { |
| 1545 | ch->statusflags &= ~EMPTYWAIT; |
| 1546 | tty_wakeup(tty); |
| 1547 | } |
| 1548 | } |
| 1549 | tty_kref_put(tty); |
| 1550 | } |
| 1551 | next: |
| 1552 | globalwinon(ch); |
| 1553 | BUG_ON(!bc); |
| 1554 | writew(1, &bc->idata); |
| 1555 | writew((tail + 4) & (IMAX - ISTART - 4), &chan0->mailbox->eout); |
| 1556 | globalwinon(chan0); |
| 1557 | } /* End while something in event queue */ |
| 1558 | } |
| 1559 | |
| 1560 | static void fepcmd(struct channel *ch, int cmd, int word_or_byte, |
| 1561 | int byte2, int ncmds, int bytecmd) |
| 1562 | { |
| 1563 | unchar __iomem *memaddr; |
| 1564 | unsigned int head, cmdTail, cmdStart, cmdMax; |
| 1565 | long count; |
| 1566 | int n; |
| 1567 | |
| 1568 | /* This is the routine in which commands may be passed to the card. */ |
| 1569 | |
| 1570 | if (ch->board->status == DISABLED) |
| 1571 | return; |
| 1572 | assertgwinon(ch); |
| 1573 | /* Remember head (As well as max) is just an offset not a base addr */ |
| 1574 | head = readw(&ch->mailbox->cin); |
| 1575 | /* cmdStart is a base address */ |
| 1576 | cmdStart = readw(&ch->mailbox->cstart); |
| 1577 | /* |
| 1578 | * We do the addition below because we do not want a max pointer |
| 1579 | * relative to cmdStart. We want a max pointer that points at the |
| 1580 | * physical end of the command queue. |
| 1581 | */ |
| 1582 | cmdMax = (cmdStart + 4 + readw(&ch->mailbox->cmax)); |
| 1583 | memaddr = ch->board->re_map_membase; |
| 1584 | |
| 1585 | if (head >= (cmdMax - cmdStart) || (head & 03)) { |
| 1586 | printk(KERN_ERR "line %d: Out of range, cmd = %x, head = %x\n", |
| 1587 | __LINE__, cmd, head); |
| 1588 | printk(KERN_ERR "line %d: Out of range, cmdMax = %x, cmdStart = %x\n", |
| 1589 | __LINE__, cmdMax, cmdStart); |
| 1590 | return; |
| 1591 | } |
| 1592 | if (bytecmd) { |
| 1593 | writeb(cmd, memaddr + head + cmdStart + 0); |
| 1594 | writeb(ch->channelnum, memaddr + head + cmdStart + 1); |
| 1595 | /* Below word_or_byte is bits to set */ |
| 1596 | writeb(word_or_byte, memaddr + head + cmdStart + 2); |
| 1597 | /* Below byte2 is bits to reset */ |
| 1598 | writeb(byte2, memaddr + head + cmdStart + 3); |
| 1599 | } else { |
| 1600 | writeb(cmd, memaddr + head + cmdStart + 0); |
| 1601 | writeb(ch->channelnum, memaddr + head + cmdStart + 1); |
| 1602 | writeb(word_or_byte, memaddr + head + cmdStart + 2); |
| 1603 | } |
| 1604 | head = (head + 4) & (cmdMax - cmdStart - 4); |
| 1605 | writew(head, &ch->mailbox->cin); |
| 1606 | count = FEPTIMEOUT; |
| 1607 | |
| 1608 | for (;;) { |
| 1609 | count--; |
| 1610 | if (count == 0) { |
| 1611 | printk(KERN_ERR "<Error> - Fep not responding in fepcmd()\n"); |
| 1612 | return; |
| 1613 | } |
| 1614 | head = readw(&ch->mailbox->cin); |
| 1615 | cmdTail = readw(&ch->mailbox->cout); |
| 1616 | n = (head - cmdTail) & (cmdMax - cmdStart - 4); |
| 1617 | /* |
| 1618 | * Basically this will break when the FEP acknowledges the |
| 1619 | * command by incrementing cmdTail (Making it equal to head). |
| 1620 | */ |
| 1621 | if (n <= ncmds * (sizeof(short) * 4)) |
| 1622 | break; |
| 1623 | } |
| 1624 | } |
| 1625 | |
| 1626 | /* |
| 1627 | * Digi products use fields in their channels structures that are very similar |
| 1628 | * to the c_cflag and c_iflag fields typically found in UNIX termios |
| 1629 | * structures. The below three routines allow mappings between these hardware |
| 1630 | * "flags" and their respective Linux flags. |
| 1631 | */ |
| 1632 | static unsigned termios2digi_h(struct channel *ch, unsigned cflag) |
| 1633 | { |
| 1634 | unsigned res = 0; |
| 1635 | |
| 1636 | if (cflag & CRTSCTS) { |
| 1637 | ch->digiext.digi_flags |= (RTSPACE | CTSPACE); |
| 1638 | res |= ((ch->m_cts) | (ch->m_rts)); |
| 1639 | } |
| 1640 | |
| 1641 | if (ch->digiext.digi_flags & RTSPACE) |
| 1642 | res |= ch->m_rts; |
| 1643 | |
| 1644 | if (ch->digiext.digi_flags & DTRPACE) |
| 1645 | res |= ch->m_dtr; |
| 1646 | |
| 1647 | if (ch->digiext.digi_flags & CTSPACE) |
| 1648 | res |= ch->m_cts; |
| 1649 | |
| 1650 | if (ch->digiext.digi_flags & DSRPACE) |
| 1651 | res |= ch->dsr; |
| 1652 | |
| 1653 | if (ch->digiext.digi_flags & DCDPACE) |
| 1654 | res |= ch->dcd; |
| 1655 | |
| 1656 | if (res & (ch->m_rts)) |
| 1657 | ch->digiext.digi_flags |= RTSPACE; |
| 1658 | |
| 1659 | if (res & (ch->m_cts)) |
| 1660 | ch->digiext.digi_flags |= CTSPACE; |
| 1661 | |
| 1662 | return res; |
| 1663 | } |
| 1664 | |
| 1665 | static unsigned termios2digi_i(struct channel *ch, unsigned iflag) |
| 1666 | { |
| 1667 | unsigned res = iflag & (IGNBRK | BRKINT | IGNPAR | PARMRK | |
| 1668 | INPCK | ISTRIP | IXON | IXANY | IXOFF); |
| 1669 | if (ch->digiext.digi_flags & DIGI_AIXON) |
| 1670 | res |= IAIXON; |
| 1671 | return res; |
| 1672 | } |
| 1673 | |
| 1674 | static unsigned termios2digi_c(struct channel *ch, unsigned cflag) |
| 1675 | { |
| 1676 | unsigned res = 0; |
| 1677 | if (cflag & CBAUDEX) { |
| 1678 | ch->digiext.digi_flags |= DIGI_FAST; |
| 1679 | /* |
| 1680 | * HUPCL bit is used by FEP to indicate fast baud table is to |
| 1681 | * be used. |
| 1682 | */ |
| 1683 | res |= FEP_HUPCL; |
| 1684 | } else |
| 1685 | ch->digiext.digi_flags &= ~DIGI_FAST; |
| 1686 | /* |
| 1687 | * CBAUD has bit position 0x1000 set these days to indicate Linux |
| 1688 | * baud rate remap. Digi hardware can't handle the bit assignment. |
| 1689 | * (We use a different bit assignment for high speed.). Clear this |
| 1690 | * bit out. |
| 1691 | */ |
| 1692 | res |= cflag & ((CBAUD ^ CBAUDEX) | PARODD | PARENB | CSTOPB | CSIZE); |
| 1693 | /* |
| 1694 | * This gets a little confusing. The Digi cards have their own |
| 1695 | * representation of c_cflags controlling baud rate. For the most part |
| 1696 | * this is identical to the Linux implementation. However; Digi |
| 1697 | * supports one rate (76800) that Linux doesn't. This means that the |
| 1698 | * c_cflag entry that would normally mean 76800 for Digi actually means |
| 1699 | * 115200 under Linux. Without the below mapping, a stty 115200 would |
| 1700 | * only drive the board at 76800. Since the rate 230400 is also found |
| 1701 | * after 76800, the same problem afflicts us when we choose a rate of |
| 1702 | * 230400. Without the below modificiation stty 230400 would actually |
| 1703 | * give us 115200. |
| 1704 | * |
| 1705 | * There are two additional differences. The Linux value for CLOCAL |
| 1706 | * (0x800; 0004000) has no meaning to the Digi hardware. Also in later |
| 1707 | * releases of Linux; the CBAUD define has CBAUDEX (0x1000; 0010000) |
| 1708 | * ored into it (CBAUD = 0x100f as opposed to 0xf). CBAUDEX should be |
| 1709 | * checked for a screened out prior to termios2digi_c returning. Since |
| 1710 | * CLOCAL isn't used by the board this can be ignored as long as the |
| 1711 | * returned value is used only by Digi hardware. |
| 1712 | */ |
| 1713 | if (cflag & CBAUDEX) { |
| 1714 | /* |
| 1715 | * The below code is trying to guarantee that only baud rates |
| 1716 | * 115200 and 230400 are remapped. We use exclusive or because |
| 1717 | * the various baud rates share common bit positions and |
| 1718 | * therefore can't be tested for easily. |
| 1719 | */ |
| 1720 | if ((!((cflag & 0x7) ^ (B115200 & ~CBAUDEX))) || |
| 1721 | (!((cflag & 0x7) ^ (B230400 & ~CBAUDEX)))) |
| 1722 | res += 1; |
| 1723 | } |
| 1724 | return res; |
| 1725 | } |
| 1726 | |
| 1727 | /* Caller must hold the locks */ |
| 1728 | static void epcaparam(struct tty_struct *tty, struct channel *ch) |
| 1729 | { |
| 1730 | unsigned int cmdHead; |
| 1731 | struct ktermios *ts; |
| 1732 | struct board_chan __iomem *bc; |
| 1733 | unsigned mval, hflow, cflag, iflag; |
| 1734 | |
| 1735 | bc = ch->brdchan; |
| 1736 | epcaassert(bc != NULL, "bc out of range"); |
| 1737 | |
| 1738 | assertgwinon(ch); |
| 1739 | ts = tty->termios; |
| 1740 | if ((ts->c_cflag & CBAUD) == 0) { /* Begin CBAUD detected */ |
| 1741 | cmdHead = readw(&bc->rin); |
| 1742 | writew(cmdHead, &bc->rout); |
| 1743 | cmdHead = readw(&bc->tin); |
| 1744 | /* Changing baud in mid-stream transmission can be wonderful */ |
| 1745 | /* |
| 1746 | * Flush current transmit buffer by setting cmdTail pointer |
| 1747 | * (tout) to cmdHead pointer (tin). Hopefully the transmit |
| 1748 | * buffer is empty. |
| 1749 | */ |
| 1750 | fepcmd(ch, STOUT, (unsigned) cmdHead, 0, 0, 0); |
| 1751 | mval = 0; |
| 1752 | } else { /* Begin CBAUD not detected */ |
| 1753 | /* |
| 1754 | * c_cflags have changed but that change had nothing to do with |
| 1755 | * BAUD. Propagate the change to the card. |
| 1756 | */ |
| 1757 | cflag = termios2digi_c(ch, ts->c_cflag); |
| 1758 | if (cflag != ch->fepcflag) { |
| 1759 | ch->fepcflag = cflag; |
| 1760 | /* Set baud rate, char size, stop bits, parity */ |
| 1761 | fepcmd(ch, SETCTRLFLAGS, (unsigned) cflag, 0, 0, 0); |
| 1762 | } |
| 1763 | /* |
| 1764 | * If the user has not forced CLOCAL and if the device is not a |
| 1765 | * CALLOUT device (Which is always CLOCAL) we set flags such |
| 1766 | * that the driver will wait on carrier detect. |
| 1767 | */ |
| 1768 | if (ts->c_cflag & CLOCAL) |
| 1769 | clear_bit(ASYNCB_CHECK_CD, &ch->port.flags); |
| 1770 | else |
| 1771 | set_bit(ASYNCB_CHECK_CD, &ch->port.flags); |
| 1772 | mval = ch->m_dtr | ch->m_rts; |
| 1773 | } /* End CBAUD not detected */ |
| 1774 | iflag = termios2digi_i(ch, ts->c_iflag); |
| 1775 | /* Check input mode flags */ |
| 1776 | if (iflag != ch->fepiflag) { |
| 1777 | ch->fepiflag = iflag; |
| 1778 | /* |
| 1779 | * Command sets channels iflag structure on the board. Such |
| 1780 | * things as input soft flow control, handling of parity |
| 1781 | * errors, and break handling are all set here. |
| 1782 | * |
| 1783 | * break handling, parity handling, input stripping, |
| 1784 | * flow control chars |
| 1785 | */ |
| 1786 | fepcmd(ch, SETIFLAGS, (unsigned int) ch->fepiflag, 0, 0, 0); |
| 1787 | } |
| 1788 | /* |
| 1789 | * Set the board mint value for this channel. This will cause hardware |
| 1790 | * events to be generated each time the DCD signal (Described in mint) |
| 1791 | * changes. |
| 1792 | */ |
| 1793 | writeb(ch->dcd, &bc->mint); |
| 1794 | if ((ts->c_cflag & CLOCAL) || (ch->digiext.digi_flags & DIGI_FORCEDCD)) |
| 1795 | if (ch->digiext.digi_flags & DIGI_FORCEDCD) |
| 1796 | writeb(0, &bc->mint); |
| 1797 | ch->imodem = readb(&bc->mstat); |
| 1798 | hflow = termios2digi_h(ch, ts->c_cflag); |
| 1799 | if (hflow != ch->hflow) { |
| 1800 | ch->hflow = hflow; |
| 1801 | /* |
| 1802 | * Hard flow control has been selected but the board is not |
| 1803 | * using it. Activate hard flow control now. |
| 1804 | */ |
| 1805 | fepcmd(ch, SETHFLOW, hflow, 0xff, 0, 1); |
| 1806 | } |
| 1807 | mval ^= ch->modemfake & (mval ^ ch->modem); |
| 1808 | |
| 1809 | if (ch->omodem ^ mval) { |
| 1810 | ch->omodem = mval; |
| 1811 | /* |
| 1812 | * The below command sets the DTR and RTS mstat structure. If |
| 1813 | * hard flow control is NOT active these changes will drive the |
| 1814 | * output of the actual DTR and RTS lines. If hard flow control |
| 1815 | * is active, the changes will be saved in the mstat structure |
| 1816 | * and only asserted when hard flow control is turned off. |
| 1817 | */ |
| 1818 | |
| 1819 | /* First reset DTR & RTS; then set them */ |
| 1820 | fepcmd(ch, SETMODEM, 0, ((ch->m_dtr)|(ch->m_rts)), 0, 1); |
| 1821 | fepcmd(ch, SETMODEM, mval, 0, 0, 1); |
| 1822 | } |
| 1823 | if (ch->startc != ch->fepstartc || ch->stopc != ch->fepstopc) { |
| 1824 | ch->fepstartc = ch->startc; |
| 1825 | ch->fepstopc = ch->stopc; |
| 1826 | /* |
| 1827 | * The XON / XOFF characters have changed; propagate these |
| 1828 | * changes to the card. |
| 1829 | */ |
| 1830 | fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1); |
| 1831 | } |
| 1832 | if (ch->startca != ch->fepstartca || ch->stopca != ch->fepstopca) { |
| 1833 | ch->fepstartca = ch->startca; |
| 1834 | ch->fepstopca = ch->stopca; |
| 1835 | /* |
| 1836 | * Similar to the above, this time the auxilarly XON / XOFF |
| 1837 | * characters have changed; propagate these changes to the card. |
| 1838 | */ |
| 1839 | fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1); |
| 1840 | } |
| 1841 | } |
| 1842 | |
| 1843 | /* Caller holds lock */ |
| 1844 | static void receive_data(struct channel *ch, struct tty_struct *tty) |
| 1845 | { |
| 1846 | unchar *rptr; |
| 1847 | struct ktermios *ts = NULL; |
| 1848 | struct board_chan __iomem *bc; |
| 1849 | int dataToRead, wrapgap, bytesAvailable; |
| 1850 | unsigned int tail, head; |
| 1851 | unsigned int wrapmask; |
| 1852 | |
| 1853 | /* |
| 1854 | * This routine is called by doint when a receive data event has taken |
| 1855 | * place. |
| 1856 | */ |
| 1857 | globalwinon(ch); |
| 1858 | if (ch->statusflags & RXSTOPPED) |
| 1859 | return; |
| 1860 | if (tty) |
| 1861 | ts = tty->termios; |
| 1862 | bc = ch->brdchan; |
| 1863 | BUG_ON(!bc); |
| 1864 | wrapmask = ch->rxbufsize - 1; |
| 1865 | |
| 1866 | /* |
| 1867 | * Get the head and tail pointers to the receiver queue. Wrap the head |
| 1868 | * pointer if it has reached the end of the buffer. |
| 1869 | */ |
| 1870 | head = readw(&bc->rin); |
| 1871 | head &= wrapmask; |
| 1872 | tail = readw(&bc->rout) & wrapmask; |
| 1873 | |
| 1874 | bytesAvailable = (head - tail) & wrapmask; |
| 1875 | if (bytesAvailable == 0) |
| 1876 | return; |
| 1877 | |
| 1878 | /* If CREAD bit is off or device not open, set TX tail to head */ |
| 1879 | if (!tty || !ts || !(ts->c_cflag & CREAD)) { |
| 1880 | writew(head, &bc->rout); |
| 1881 | return; |
| 1882 | } |
| 1883 | |
| 1884 | if (tty_buffer_request_room(tty, bytesAvailable + 1) == 0) |
| 1885 | return; |
| 1886 | |
| 1887 | if (readb(&bc->orun)) { |
| 1888 | writeb(0, &bc->orun); |
| 1889 | printk(KERN_WARNING "epca; overrun! DigiBoard device %s\n", |
| 1890 | tty->name); |
| 1891 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
| 1892 | } |
| 1893 | rxwinon(ch); |
| 1894 | while (bytesAvailable > 0) { |
| 1895 | /* Begin while there is data on the card */ |
| 1896 | wrapgap = (head >= tail) ? head - tail : ch->rxbufsize - tail; |
| 1897 | /* |
| 1898 | * Even if head has wrapped around only report the amount of |
| 1899 | * data to be equal to the size - tail. Remember memcpy can't |
| 1900 | * automaticly wrap around the receive buffer. |
| 1901 | */ |
| 1902 | dataToRead = (wrapgap < bytesAvailable) ? wrapgap |
| 1903 | : bytesAvailable; |
| 1904 | /* Make sure we don't overflow the buffer */ |
| 1905 | dataToRead = tty_prepare_flip_string(tty, &rptr, dataToRead); |
| 1906 | if (dataToRead == 0) |
| 1907 | break; |
| 1908 | /* |
| 1909 | * Move data read from our card into the line disciplines |
| 1910 | * buffer for translation if necessary. |
| 1911 | */ |
| 1912 | memcpy_fromio(rptr, ch->rxptr + tail, dataToRead); |
| 1913 | tail = (tail + dataToRead) & wrapmask; |
| 1914 | bytesAvailable -= dataToRead; |
| 1915 | } /* End while there is data on the card */ |
| 1916 | globalwinon(ch); |
| 1917 | writew(tail, &bc->rout); |
| 1918 | /* Must be called with global data */ |
| 1919 | tty_schedule_flip(tty); |
| 1920 | } |
| 1921 | |
| 1922 | static int info_ioctl(struct tty_struct *tty, struct file *file, |
| 1923 | unsigned int cmd, unsigned long arg) |
| 1924 | { |
| 1925 | switch (cmd) { |
| 1926 | case DIGI_GETINFO: |
| 1927 | { |
| 1928 | struct digi_info di; |
| 1929 | int brd; |
| 1930 | |
| 1931 | if (get_user(brd, (unsigned int __user *)arg)) |
| 1932 | return -EFAULT; |
| 1933 | if (brd < 0 || brd >= num_cards || num_cards == 0) |
| 1934 | return -ENODEV; |
| 1935 | |
| 1936 | memset(&di, 0, sizeof(di)); |
| 1937 | |
| 1938 | di.board = brd; |
| 1939 | di.status = boards[brd].status; |
| 1940 | di.type = boards[brd].type ; |
| 1941 | di.numports = boards[brd].numports ; |
| 1942 | /* Legacy fixups - just move along nothing to see */ |
| 1943 | di.port = (unsigned char *)boards[brd].port ; |
| 1944 | di.membase = (unsigned char *)boards[brd].membase ; |
| 1945 | |
| 1946 | if (copy_to_user((void __user *)arg, &di, sizeof(di))) |
| 1947 | return -EFAULT; |
| 1948 | break; |
| 1949 | |
| 1950 | } |
| 1951 | |
| 1952 | case DIGI_POLLER: |
| 1953 | { |
| 1954 | int brd = arg & 0xff000000 >> 16; |
| 1955 | unsigned char state = arg & 0xff; |
| 1956 | |
| 1957 | if (brd < 0 || brd >= num_cards) { |
| 1958 | printk(KERN_ERR "epca: DIGI POLLER : brd not valid!\n"); |
| 1959 | return -ENODEV; |
| 1960 | } |
| 1961 | digi_poller_inhibited = state; |
| 1962 | break; |
| 1963 | } |
| 1964 | |
| 1965 | case DIGI_INIT: |
| 1966 | { |
| 1967 | /* |
| 1968 | * This call is made by the apps to complete the |
| 1969 | * initialization of the board(s). This routine is |
| 1970 | * responsible for setting the card to its initial |
| 1971 | * state and setting the drivers control fields to the |
| 1972 | * sutianle settings for the card in question. |
| 1973 | */ |
| 1974 | int crd; |
| 1975 | for (crd = 0; crd < num_cards; crd++) |
| 1976 | post_fep_init(crd); |
| 1977 | break; |
| 1978 | } |
| 1979 | default: |
| 1980 | return -ENOTTY; |
| 1981 | } |
| 1982 | return 0; |
| 1983 | } |
| 1984 | |
| 1985 | static int pc_tiocmget(struct tty_struct *tty, struct file *file) |
| 1986 | { |
| 1987 | struct channel *ch = tty->driver_data; |
| 1988 | struct board_chan __iomem *bc; |
| 1989 | unsigned int mstat, mflag = 0; |
| 1990 | unsigned long flags; |
| 1991 | |
| 1992 | if (ch) |
| 1993 | bc = ch->brdchan; |
| 1994 | else |
| 1995 | return -EINVAL; |
| 1996 | |
| 1997 | spin_lock_irqsave(&epca_lock, flags); |
| 1998 | globalwinon(ch); |
| 1999 | mstat = readb(&bc->mstat); |
| 2000 | memoff(ch); |
| 2001 | spin_unlock_irqrestore(&epca_lock, flags); |
| 2002 | |
| 2003 | if (mstat & ch->m_dtr) |
| 2004 | mflag |= TIOCM_DTR; |
| 2005 | if (mstat & ch->m_rts) |
| 2006 | mflag |= TIOCM_RTS; |
| 2007 | if (mstat & ch->m_cts) |
| 2008 | mflag |= TIOCM_CTS; |
| 2009 | if (mstat & ch->dsr) |
| 2010 | mflag |= TIOCM_DSR; |
| 2011 | if (mstat & ch->m_ri) |
| 2012 | mflag |= TIOCM_RI; |
| 2013 | if (mstat & ch->dcd) |
| 2014 | mflag |= TIOCM_CD; |
| 2015 | return mflag; |
| 2016 | } |
| 2017 | |
| 2018 | static int pc_tiocmset(struct tty_struct *tty, struct file *file, |
| 2019 | unsigned int set, unsigned int clear) |
| 2020 | { |
| 2021 | struct channel *ch = tty->driver_data; |
| 2022 | unsigned long flags; |
| 2023 | |
| 2024 | if (!ch) |
| 2025 | return -EINVAL; |
| 2026 | |
| 2027 | spin_lock_irqsave(&epca_lock, flags); |
| 2028 | /* |
| 2029 | * I think this modemfake stuff is broken. It doesn't correctly reflect |
| 2030 | * the behaviour desired by the TIOCM* ioctls. Therefore this is |
| 2031 | * probably broken. |
| 2032 | */ |
| 2033 | if (set & TIOCM_RTS) { |
| 2034 | ch->modemfake |= ch->m_rts; |
| 2035 | ch->modem |= ch->m_rts; |
| 2036 | } |
| 2037 | if (set & TIOCM_DTR) { |
| 2038 | ch->modemfake |= ch->m_dtr; |
| 2039 | ch->modem |= ch->m_dtr; |
| 2040 | } |
| 2041 | if (clear & TIOCM_RTS) { |
| 2042 | ch->modemfake |= ch->m_rts; |
| 2043 | ch->modem &= ~ch->m_rts; |
| 2044 | } |
| 2045 | if (clear & TIOCM_DTR) { |
| 2046 | ch->modemfake |= ch->m_dtr; |
| 2047 | ch->modem &= ~ch->m_dtr; |
| 2048 | } |
| 2049 | globalwinon(ch); |
| 2050 | /* |
| 2051 | * The below routine generally sets up parity, baud, flow control |
| 2052 | * issues, etc.... It effect both control flags and input flags. |
| 2053 | */ |
| 2054 | epcaparam(tty, ch); |
| 2055 | memoff(ch); |
| 2056 | spin_unlock_irqrestore(&epca_lock, flags); |
| 2057 | return 0; |
| 2058 | } |
| 2059 | |
| 2060 | static int pc_ioctl(struct tty_struct *tty, struct file *file, |
| 2061 | unsigned int cmd, unsigned long arg) |
| 2062 | { |
| 2063 | digiflow_t dflow; |
| 2064 | unsigned long flags; |
| 2065 | unsigned int mflag, mstat; |
| 2066 | unsigned char startc, stopc; |
| 2067 | struct board_chan __iomem *bc; |
| 2068 | struct channel *ch = tty->driver_data; |
| 2069 | void __user *argp = (void __user *)arg; |
| 2070 | |
| 2071 | if (ch) |
| 2072 | bc = ch->brdchan; |
| 2073 | else |
| 2074 | return -EINVAL; |
| 2075 | switch (cmd) { |
| 2076 | case TIOCMODG: |
| 2077 | mflag = pc_tiocmget(tty, file); |
| 2078 | if (put_user(mflag, (unsigned long __user *)argp)) |
| 2079 | return -EFAULT; |
| 2080 | break; |
| 2081 | case TIOCMODS: |
| 2082 | if (get_user(mstat, (unsigned __user *)argp)) |
| 2083 | return -EFAULT; |
| 2084 | return pc_tiocmset(tty, file, mstat, ~mstat); |
| 2085 | case TIOCSDTR: |
| 2086 | spin_lock_irqsave(&epca_lock, flags); |
| 2087 | ch->omodem |= ch->m_dtr; |
| 2088 | globalwinon(ch); |
| 2089 | fepcmd(ch, SETMODEM, ch->m_dtr, 0, 10, 1); |
| 2090 | memoff(ch); |
| 2091 | spin_unlock_irqrestore(&epca_lock, flags); |
| 2092 | break; |
| 2093 | |
| 2094 | case TIOCCDTR: |
| 2095 | spin_lock_irqsave(&epca_lock, flags); |
| 2096 | ch->omodem &= ~ch->m_dtr; |
| 2097 | globalwinon(ch); |
| 2098 | fepcmd(ch, SETMODEM, 0, ch->m_dtr, 10, 1); |
| 2099 | memoff(ch); |
| 2100 | spin_unlock_irqrestore(&epca_lock, flags); |
| 2101 | break; |
| 2102 | case DIGI_GETA: |
| 2103 | if (copy_to_user(argp, &ch->digiext, sizeof(digi_t))) |
| 2104 | return -EFAULT; |
| 2105 | break; |
| 2106 | case DIGI_SETAW: |
| 2107 | case DIGI_SETAF: |
| 2108 | lock_kernel(); |
| 2109 | if (cmd == DIGI_SETAW) { |
| 2110 | /* Setup an event to indicate when the transmit |
| 2111 | buffer empties */ |
| 2112 | spin_lock_irqsave(&epca_lock, flags); |
| 2113 | setup_empty_event(tty, ch); |
| 2114 | spin_unlock_irqrestore(&epca_lock, flags); |
| 2115 | tty_wait_until_sent(tty, 0); |
| 2116 | } else { |
| 2117 | /* ldisc lock already held in ioctl */ |
| 2118 | if (tty->ldisc->ops->flush_buffer) |
| 2119 | tty->ldisc->ops->flush_buffer(tty); |
| 2120 | } |
| 2121 | unlock_kernel(); |
| 2122 | /* Fall Thru */ |
| 2123 | case DIGI_SETA: |
| 2124 | if (copy_from_user(&ch->digiext, argp, sizeof(digi_t))) |
| 2125 | return -EFAULT; |
| 2126 | |
| 2127 | if (ch->digiext.digi_flags & DIGI_ALTPIN) { |
| 2128 | ch->dcd = ch->m_dsr; |
| 2129 | ch->dsr = ch->m_dcd; |
| 2130 | } else { |
| 2131 | ch->dcd = ch->m_dcd; |
| 2132 | ch->dsr = ch->m_dsr; |
| 2133 | } |
| 2134 | |
| 2135 | spin_lock_irqsave(&epca_lock, flags); |
| 2136 | globalwinon(ch); |
| 2137 | |
| 2138 | /* |
| 2139 | * The below routine generally sets up parity, baud, flow |
| 2140 | * control issues, etc.... It effect both control flags and |
| 2141 | * input flags. |
| 2142 | */ |
| 2143 | epcaparam(tty, ch); |
| 2144 | memoff(ch); |
| 2145 | spin_unlock_irqrestore(&epca_lock, flags); |
| 2146 | break; |
| 2147 | |
| 2148 | case DIGI_GETFLOW: |
| 2149 | case DIGI_GETAFLOW: |
| 2150 | spin_lock_irqsave(&epca_lock, flags); |
| 2151 | globalwinon(ch); |
| 2152 | if (cmd == DIGI_GETFLOW) { |
| 2153 | dflow.startc = readb(&bc->startc); |
| 2154 | dflow.stopc = readb(&bc->stopc); |
| 2155 | } else { |
| 2156 | dflow.startc = readb(&bc->startca); |
| 2157 | dflow.stopc = readb(&bc->stopca); |
| 2158 | } |
| 2159 | memoff(ch); |
| 2160 | spin_unlock_irqrestore(&epca_lock, flags); |
| 2161 | |
| 2162 | if (copy_to_user(argp, &dflow, sizeof(dflow))) |
| 2163 | return -EFAULT; |
| 2164 | break; |
| 2165 | |
| 2166 | case DIGI_SETAFLOW: |
| 2167 | case DIGI_SETFLOW: |
| 2168 | if (cmd == DIGI_SETFLOW) { |
| 2169 | startc = ch->startc; |
| 2170 | stopc = ch->stopc; |
| 2171 | } else { |
| 2172 | startc = ch->startca; |
| 2173 | stopc = ch->stopca; |
| 2174 | } |
| 2175 | |
| 2176 | if (copy_from_user(&dflow, argp, sizeof(dflow))) |
| 2177 | return -EFAULT; |
| 2178 | |
| 2179 | if (dflow.startc != startc || dflow.stopc != stopc) { |
| 2180 | /* Begin if setflow toggled */ |
| 2181 | spin_lock_irqsave(&epca_lock, flags); |
| 2182 | globalwinon(ch); |
| 2183 | |
| 2184 | if (cmd == DIGI_SETFLOW) { |
| 2185 | ch->fepstartc = ch->startc = dflow.startc; |
| 2186 | ch->fepstopc = ch->stopc = dflow.stopc; |
| 2187 | fepcmd(ch, SONOFFC, ch->fepstartc, |
| 2188 | ch->fepstopc, 0, 1); |
| 2189 | } else { |
| 2190 | ch->fepstartca = ch->startca = dflow.startc; |
| 2191 | ch->fepstopca = ch->stopca = dflow.stopc; |
| 2192 | fepcmd(ch, SAUXONOFFC, ch->fepstartca, |
| 2193 | ch->fepstopca, 0, 1); |
| 2194 | } |
| 2195 | |
| 2196 | if (ch->statusflags & TXSTOPPED) |
| 2197 | pc_start(tty); |
| 2198 | |
| 2199 | memoff(ch); |
| 2200 | spin_unlock_irqrestore(&epca_lock, flags); |
| 2201 | } /* End if setflow toggled */ |
| 2202 | break; |
| 2203 | default: |
| 2204 | return -ENOIOCTLCMD; |
| 2205 | } |
| 2206 | return 0; |
| 2207 | } |
| 2208 | |
| 2209 | static void pc_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
| 2210 | { |
| 2211 | struct channel *ch; |
| 2212 | unsigned long flags; |
| 2213 | /* |
| 2214 | * verifyChannel returns the channel from the tty struct if it is |
| 2215 | * valid. This serves as a sanity check. |
| 2216 | */ |
| 2217 | ch = verifyChannel(tty); |
| 2218 | |
| 2219 | if (ch != NULL) { /* Begin if channel valid */ |
| 2220 | spin_lock_irqsave(&epca_lock, flags); |
| 2221 | globalwinon(ch); |
| 2222 | epcaparam(tty, ch); |
| 2223 | memoff(ch); |
| 2224 | spin_unlock_irqrestore(&epca_lock, flags); |
| 2225 | |
| 2226 | if ((old_termios->c_cflag & CRTSCTS) && |
| 2227 | ((tty->termios->c_cflag & CRTSCTS) == 0)) |
| 2228 | tty->hw_stopped = 0; |
| 2229 | |
| 2230 | if (!(old_termios->c_cflag & CLOCAL) && |
| 2231 | (tty->termios->c_cflag & CLOCAL)) |
| 2232 | wake_up_interruptible(&ch->port.open_wait); |
| 2233 | |
| 2234 | } /* End if channel valid */ |
| 2235 | } |
| 2236 | |
| 2237 | static void do_softint(struct work_struct *work) |
| 2238 | { |
| 2239 | struct channel *ch = container_of(work, struct channel, tqueue); |
| 2240 | /* Called in response to a modem change event */ |
| 2241 | if (ch && ch->magic == EPCA_MAGIC) { |
| 2242 | struct tty_struct *tty = tty_port_tty_get(&ch->port);; |
| 2243 | |
| 2244 | if (tty && tty->driver_data) { |
| 2245 | if (test_and_clear_bit(EPCA_EVENT_HANGUP, &ch->event)) { |
| 2246 | tty_hangup(tty); |
| 2247 | wake_up_interruptible(&ch->port.open_wait); |
| 2248 | clear_bit(ASYNCB_NORMAL_ACTIVE, |
| 2249 | &ch->port.flags); |
| 2250 | } |
| 2251 | } |
| 2252 | tty_kref_put(tty); |
| 2253 | } |
| 2254 | } |
| 2255 | |
| 2256 | /* |
| 2257 | * pc_stop and pc_start provide software flow control to the routine and the |
| 2258 | * pc_ioctl routine. |
| 2259 | */ |
| 2260 | static void pc_stop(struct tty_struct *tty) |
| 2261 | { |
| 2262 | struct channel *ch; |
| 2263 | unsigned long flags; |
| 2264 | /* |
| 2265 | * verifyChannel returns the channel from the tty struct if it is |
| 2266 | * valid. This serves as a sanity check. |
| 2267 | */ |
| 2268 | ch = verifyChannel(tty); |
| 2269 | if (ch != NULL) { |
| 2270 | spin_lock_irqsave(&epca_lock, flags); |
| 2271 | if ((ch->statusflags & TXSTOPPED) == 0) { |
| 2272 | /* Begin if transmit stop requested */ |
| 2273 | globalwinon(ch); |
| 2274 | /* STOP transmitting now !! */ |
| 2275 | fepcmd(ch, PAUSETX, 0, 0, 0, 0); |
| 2276 | ch->statusflags |= TXSTOPPED; |
| 2277 | memoff(ch); |
| 2278 | } /* End if transmit stop requested */ |
| 2279 | spin_unlock_irqrestore(&epca_lock, flags); |
| 2280 | } |
| 2281 | } |
| 2282 | |
| 2283 | static void pc_start(struct tty_struct *tty) |
| 2284 | { |
| 2285 | struct channel *ch; |
| 2286 | /* |
| 2287 | * verifyChannel returns the channel from the tty struct if it is |
| 2288 | * valid. This serves as a sanity check. |
| 2289 | */ |
| 2290 | ch = verifyChannel(tty); |
| 2291 | if (ch != NULL) { |
| 2292 | unsigned long flags; |
| 2293 | spin_lock_irqsave(&epca_lock, flags); |
| 2294 | /* Just in case output was resumed because of a change |
| 2295 | in Digi-flow */ |
| 2296 | if (ch->statusflags & TXSTOPPED) { |
| 2297 | /* Begin transmit resume requested */ |
| 2298 | struct board_chan __iomem *bc; |
| 2299 | globalwinon(ch); |
| 2300 | bc = ch->brdchan; |
| 2301 | if (ch->statusflags & LOWWAIT) |
| 2302 | writeb(1, &bc->ilow); |
| 2303 | /* Okay, you can start transmitting again... */ |
| 2304 | fepcmd(ch, RESUMETX, 0, 0, 0, 0); |
| 2305 | ch->statusflags &= ~TXSTOPPED; |
| 2306 | memoff(ch); |
| 2307 | } /* End transmit resume requested */ |
| 2308 | spin_unlock_irqrestore(&epca_lock, flags); |
| 2309 | } |
| 2310 | } |
| 2311 | |
| 2312 | /* |
| 2313 | * The below routines pc_throttle and pc_unthrottle are used to slow (And |
| 2314 | * resume) the receipt of data into the kernels receive buffers. The exact |
| 2315 | * occurrence of this depends on the size of the kernels receive buffer and |
| 2316 | * what the 'watermarks' are set to for that buffer. See the n_ttys.c file for |
| 2317 | * more details. |
| 2318 | */ |
| 2319 | static void pc_throttle(struct tty_struct *tty) |
| 2320 | { |
| 2321 | struct channel *ch; |
| 2322 | unsigned long flags; |
| 2323 | /* |
| 2324 | * verifyChannel returns the channel from the tty struct if it is |
| 2325 | * valid. This serves as a sanity check. |
| 2326 | */ |
| 2327 | ch = verifyChannel(tty); |
| 2328 | if (ch != NULL) { |
| 2329 | spin_lock_irqsave(&epca_lock, flags); |
| 2330 | if ((ch->statusflags & RXSTOPPED) == 0) { |
| 2331 | globalwinon(ch); |
| 2332 | fepcmd(ch, PAUSERX, 0, 0, 0, 0); |
| 2333 | ch->statusflags |= RXSTOPPED; |
| 2334 | memoff(ch); |
| 2335 | } |
| 2336 | spin_unlock_irqrestore(&epca_lock, flags); |
| 2337 | } |
| 2338 | } |
| 2339 | |
| 2340 | static void pc_unthrottle(struct tty_struct *tty) |
| 2341 | { |
| 2342 | struct channel *ch; |
| 2343 | unsigned long flags; |
| 2344 | /* |
| 2345 | * verifyChannel returns the channel from the tty struct if it is |
| 2346 | * valid. This serves as a sanity check. |
| 2347 | */ |
| 2348 | ch = verifyChannel(tty); |
| 2349 | if (ch != NULL) { |
| 2350 | /* Just in case output was resumed because of a change |
| 2351 | in Digi-flow */ |
| 2352 | spin_lock_irqsave(&epca_lock, flags); |
| 2353 | if (ch->statusflags & RXSTOPPED) { |
| 2354 | globalwinon(ch); |
| 2355 | fepcmd(ch, RESUMERX, 0, 0, 0, 0); |
| 2356 | ch->statusflags &= ~RXSTOPPED; |
| 2357 | memoff(ch); |
| 2358 | } |
| 2359 | spin_unlock_irqrestore(&epca_lock, flags); |
| 2360 | } |
| 2361 | } |
| 2362 | |
| 2363 | static int pc_send_break(struct tty_struct *tty, int msec) |
| 2364 | { |
| 2365 | struct channel *ch = tty->driver_data; |
| 2366 | unsigned long flags; |
| 2367 | |
| 2368 | if (msec == -1) |
| 2369 | msec = 0xFFFF; |
| 2370 | else if (msec > 0xFFFE) |
| 2371 | msec = 0xFFFE; |
| 2372 | else if (msec < 1) |
| 2373 | msec = 1; |
| 2374 | |
| 2375 | spin_lock_irqsave(&epca_lock, flags); |
| 2376 | globalwinon(ch); |
| 2377 | /* |
| 2378 | * Maybe I should send an infinite break here, schedule() for msec |
| 2379 | * amount of time, and then stop the break. This way, the user can't |
| 2380 | * screw up the FEP by causing digi_send_break() to be called (i.e. via |
| 2381 | * an ioctl()) more than once in msec amount of time. |
| 2382 | * Try this for now... |
| 2383 | */ |
| 2384 | fepcmd(ch, SENDBREAK, msec, 0, 10, 0); |
| 2385 | memoff(ch); |
| 2386 | spin_unlock_irqrestore(&epca_lock, flags); |
| 2387 | return 0; |
| 2388 | } |
| 2389 | |
| 2390 | /* Caller MUST hold the lock */ |
| 2391 | static void setup_empty_event(struct tty_struct *tty, struct channel *ch) |
| 2392 | { |
| 2393 | struct board_chan __iomem *bc = ch->brdchan; |
| 2394 | |
| 2395 | globalwinon(ch); |
| 2396 | ch->statusflags |= EMPTYWAIT; |
| 2397 | /* |
| 2398 | * When set the iempty flag request a event to be generated when the |
| 2399 | * transmit buffer is empty (If there is no BREAK in progress). |
| 2400 | */ |
| 2401 | writeb(1, &bc->iempty); |
| 2402 | memoff(ch); |
| 2403 | } |
| 2404 | |
| 2405 | #ifndef MODULE |
| 2406 | static void __init epca_setup(char *str, int *ints) |
| 2407 | { |
| 2408 | struct board_info board; |
| 2409 | int index, loop, last; |
| 2410 | char *temp, *t2; |
| 2411 | unsigned len; |
| 2412 | |
| 2413 | /* |
| 2414 | * If this routine looks a little strange it is because it is only |
| 2415 | * called if a LILO append command is given to boot the kernel with |
| 2416 | * parameters. In this way, we can provide the user a method of |
| 2417 | * changing his board configuration without rebuilding the kernel. |
| 2418 | */ |
| 2419 | if (!liloconfig) |
| 2420 | liloconfig = 1; |
| 2421 | |
| 2422 | memset(&board, 0, sizeof(board)); |
| 2423 | |
| 2424 | /* Assume the data is int first, later we can change it */ |
| 2425 | /* I think that array position 0 of ints holds the number of args */ |
| 2426 | for (last = 0, index = 1; index <= ints[0]; index++) |
| 2427 | switch (index) { /* Begin parse switch */ |
| 2428 | case 1: |
| 2429 | board.status = ints[index]; |
| 2430 | /* |
| 2431 | * We check for 2 (As opposed to 1; because 2 is a flag |
| 2432 | * instructing the driver to ignore epcaconfig.) For |
| 2433 | * this reason we check for 2. |
| 2434 | */ |
| 2435 | if (board.status == 2) { |
| 2436 | /* Begin ignore epcaconfig as well as lilo cmd line */ |
| 2437 | nbdevs = 0; |
| 2438 | num_cards = 0; |
| 2439 | return; |
| 2440 | } /* End ignore epcaconfig as well as lilo cmd line */ |
| 2441 | |
| 2442 | if (board.status > 2) { |
| 2443 | printk(KERN_ERR "epca_setup: Invalid board status 0x%x\n", |
| 2444 | board.status); |
| 2445 | invalid_lilo_config = 1; |
| 2446 | setup_error_code |= INVALID_BOARD_STATUS; |
| 2447 | return; |
| 2448 | } |
| 2449 | last = index; |
| 2450 | break; |
| 2451 | case 2: |
| 2452 | board.type = ints[index]; |
| 2453 | if (board.type >= PCIXEM) { |
| 2454 | printk(KERN_ERR "epca_setup: Invalid board type 0x%x\n", board.type); |
| 2455 | invalid_lilo_config = 1; |
| 2456 | setup_error_code |= INVALID_BOARD_TYPE; |
| 2457 | return; |
| 2458 | } |
| 2459 | last = index; |
| 2460 | break; |
| 2461 | case 3: |
| 2462 | board.altpin = ints[index]; |
| 2463 | if (board.altpin > 1) { |
| 2464 | printk(KERN_ERR "epca_setup: Invalid board altpin 0x%x\n", board.altpin); |
| 2465 | invalid_lilo_config = 1; |
| 2466 | setup_error_code |= INVALID_ALTPIN; |
| 2467 | return; |
| 2468 | } |
| 2469 | last = index; |
| 2470 | break; |
| 2471 | |
| 2472 | case 4: |
| 2473 | board.numports = ints[index]; |
| 2474 | if (board.numports < 2 || board.numports > 256) { |
| 2475 | printk(KERN_ERR "epca_setup: Invalid board numports 0x%x\n", board.numports); |
| 2476 | invalid_lilo_config = 1; |
| 2477 | setup_error_code |= INVALID_NUM_PORTS; |
| 2478 | return; |
| 2479 | } |
| 2480 | nbdevs += board.numports; |
| 2481 | last = index; |
| 2482 | break; |
| 2483 | |
| 2484 | case 5: |
| 2485 | board.port = ints[index]; |
| 2486 | if (ints[index] <= 0) { |
| 2487 | printk(KERN_ERR "epca_setup: Invalid io port 0x%x\n", (unsigned int)board.port); |
| 2488 | invalid_lilo_config = 1; |
| 2489 | setup_error_code |= INVALID_PORT_BASE; |
| 2490 | return; |
| 2491 | } |
| 2492 | last = index; |
| 2493 | break; |
| 2494 | |
| 2495 | case 6: |
| 2496 | board.membase = ints[index]; |
| 2497 | if (ints[index] <= 0) { |
| 2498 | printk(KERN_ERR "epca_setup: Invalid memory base 0x%x\n", |
| 2499 | (unsigned int)board.membase); |
| 2500 | invalid_lilo_config = 1; |
| 2501 | setup_error_code |= INVALID_MEM_BASE; |
| 2502 | return; |
| 2503 | } |
| 2504 | last = index; |
| 2505 | break; |
| 2506 | |
| 2507 | default: |
| 2508 | printk(KERN_ERR "<Error> - epca_setup: Too many integer parms\n"); |
| 2509 | return; |
| 2510 | |
| 2511 | } /* End parse switch */ |
| 2512 | |
| 2513 | while (str && *str) { /* Begin while there is a string arg */ |
| 2514 | /* find the next comma or terminator */ |
| 2515 | temp = str; |
| 2516 | /* While string is not null, and a comma hasn't been found */ |
| 2517 | while (*temp && (*temp != ',')) |
| 2518 | temp++; |
| 2519 | if (!*temp) |
| 2520 | temp = NULL; |
| 2521 | else |
| 2522 | *temp++ = 0; |
| 2523 | /* Set index to the number of args + 1 */ |
| 2524 | index = last + 1; |
| 2525 | |
| 2526 | switch (index) { |
| 2527 | case 1: |
| 2528 | len = strlen(str); |
| 2529 | if (strncmp("Disable", str, len) == 0) |
| 2530 | board.status = 0; |
| 2531 | else if (strncmp("Enable", str, len) == 0) |
| 2532 | board.status = 1; |
| 2533 | else { |
| 2534 | printk(KERN_ERR "epca_setup: Invalid status %s\n", str); |
| 2535 | invalid_lilo_config = 1; |
| 2536 | setup_error_code |= INVALID_BOARD_STATUS; |
| 2537 | return; |
| 2538 | } |
| 2539 | last = index; |
| 2540 | break; |
| 2541 | |
| 2542 | case 2: |
| 2543 | for (loop = 0; loop < EPCA_NUM_TYPES; loop++) |
| 2544 | if (strcmp(board_desc[loop], str) == 0) |
| 2545 | break; |
| 2546 | /* |
| 2547 | * If the index incremented above refers to a |
| 2548 | * legitamate board type set it here. |
| 2549 | */ |
| 2550 | if (index < EPCA_NUM_TYPES) |
| 2551 | board.type = loop; |
| 2552 | else { |
| 2553 | printk(KERN_ERR "epca_setup: Invalid board type: %s\n", str); |
| 2554 | invalid_lilo_config = 1; |
| 2555 | setup_error_code |= INVALID_BOARD_TYPE; |
| 2556 | return; |
| 2557 | } |
| 2558 | last = index; |
| 2559 | break; |
| 2560 | |
| 2561 | case 3: |
| 2562 | len = strlen(str); |
| 2563 | if (strncmp("Disable", str, len) == 0) |
| 2564 | board.altpin = 0; |
| 2565 | else if (strncmp("Enable", str, len) == 0) |
| 2566 | board.altpin = 1; |
| 2567 | else { |
| 2568 | printk(KERN_ERR "epca_setup: Invalid altpin %s\n", str); |
| 2569 | invalid_lilo_config = 1; |
| 2570 | setup_error_code |= INVALID_ALTPIN; |
| 2571 | return; |
| 2572 | } |
| 2573 | last = index; |
| 2574 | break; |
| 2575 | |
| 2576 | case 4: |
| 2577 | t2 = str; |
| 2578 | while (isdigit(*t2)) |
| 2579 | t2++; |
| 2580 | |
| 2581 | if (*t2) { |
| 2582 | printk(KERN_ERR "epca_setup: Invalid port count %s\n", str); |
| 2583 | invalid_lilo_config = 1; |
| 2584 | setup_error_code |= INVALID_NUM_PORTS; |
| 2585 | return; |
| 2586 | } |
| 2587 | |
| 2588 | /* |
| 2589 | * There is not a man page for simple_strtoul but the |
| 2590 | * code can be found in vsprintf.c. The first argument |
| 2591 | * is the string to translate (To an unsigned long |
| 2592 | * obviously), the second argument can be the address |
| 2593 | * of any character variable or a NULL. If a variable |
| 2594 | * is given, the end pointer of the string will be |
| 2595 | * stored in that variable; if a NULL is given the end |
| 2596 | * pointer will not be returned. The last argument is |
| 2597 | * the base to use. If a 0 is indicated, the routine |
| 2598 | * will attempt to determine the proper base by looking |
| 2599 | * at the values prefix (A '0' for octal, a 'x' for |
| 2600 | * hex, etc ... If a value is given it will use that |
| 2601 | * value as the base. |
| 2602 | */ |
| 2603 | board.numports = simple_strtoul(str, NULL, 0); |
| 2604 | nbdevs += board.numports; |
| 2605 | last = index; |
| 2606 | break; |
| 2607 | |
| 2608 | case 5: |
| 2609 | t2 = str; |
| 2610 | while (isxdigit(*t2)) |
| 2611 | t2++; |
| 2612 | |
| 2613 | if (*t2) { |
| 2614 | printk(KERN_ERR "epca_setup: Invalid i/o address %s\n", str); |
| 2615 | invalid_lilo_config = 1; |
| 2616 | setup_error_code |= INVALID_PORT_BASE; |
| 2617 | return; |
| 2618 | } |
| 2619 | |
| 2620 | board.port = simple_strtoul(str, NULL, 16); |
| 2621 | last = index; |
| 2622 | break; |
| 2623 | |
| 2624 | case 6: |
| 2625 | t2 = str; |
| 2626 | while (isxdigit(*t2)) |
| 2627 | t2++; |
| 2628 | |
| 2629 | if (*t2) { |
| 2630 | printk(KERN_ERR "epca_setup: Invalid memory base %s\n", str); |
| 2631 | invalid_lilo_config = 1; |
| 2632 | setup_error_code |= INVALID_MEM_BASE; |
| 2633 | return; |
| 2634 | } |
| 2635 | board.membase = simple_strtoul(str, NULL, 16); |
| 2636 | last = index; |
| 2637 | break; |
| 2638 | default: |
| 2639 | printk(KERN_ERR "epca: Too many string parms\n"); |
| 2640 | return; |
| 2641 | } |
| 2642 | str = temp; |
| 2643 | } /* End while there is a string arg */ |
| 2644 | |
| 2645 | if (last < 6) { |
| 2646 | printk(KERN_ERR "epca: Insufficient parms specified\n"); |
| 2647 | return; |
| 2648 | } |
| 2649 | |
| 2650 | /* I should REALLY validate the stuff here */ |
| 2651 | /* Copies our local copy of board into boards */ |
| 2652 | memcpy((void *)&boards[num_cards], (void *)&board, sizeof(board)); |
| 2653 | /* Does this get called once per lilo arg are what ? */ |
| 2654 | printk(KERN_INFO "PC/Xx: Added board %i, %s %i ports at 0x%4.4X base 0x%6.6X\n", |
| 2655 | num_cards, board_desc[board.type], |
| 2656 | board.numports, (int)board.port, (unsigned int) board.membase); |
| 2657 | num_cards++; |
| 2658 | } |
| 2659 | |
| 2660 | static int __init epca_real_setup(char *str) |
| 2661 | { |
| 2662 | int ints[11]; |
| 2663 | |
| 2664 | epca_setup(get_options(str, 11, ints), ints); |
| 2665 | return 1; |
| 2666 | } |
| 2667 | |
| 2668 | __setup("digiepca", epca_real_setup); |
| 2669 | #endif |
| 2670 | |
| 2671 | enum epic_board_types { |
| 2672 | brd_xr = 0, |
| 2673 | brd_xem, |
| 2674 | brd_cx, |
| 2675 | brd_xrj, |
| 2676 | }; |
| 2677 | |
| 2678 | /* indexed directly by epic_board_types enum */ |
| 2679 | static struct { |
| 2680 | unsigned char board_type; |
| 2681 | unsigned bar_idx; /* PCI base address region */ |
| 2682 | } epca_info_tbl[] = { |
| 2683 | { PCIXR, 0, }, |
| 2684 | { PCIXEM, 0, }, |
| 2685 | { PCICX, 0, }, |
| 2686 | { PCIXRJ, 2, }, |
| 2687 | }; |
| 2688 | |
| 2689 | static int __devinit epca_init_one(struct pci_dev *pdev, |
| 2690 | const struct pci_device_id *ent) |
| 2691 | { |
| 2692 | static int board_num = -1; |
| 2693 | int board_idx, info_idx = ent->driver_data; |
| 2694 | unsigned long addr; |
| 2695 | |
| 2696 | if (pci_enable_device(pdev)) |
| 2697 | return -EIO; |
| 2698 | |
| 2699 | board_num++; |
| 2700 | board_idx = board_num + num_cards; |
| 2701 | if (board_idx >= MAXBOARDS) |
| 2702 | goto err_out; |
| 2703 | |
| 2704 | addr = pci_resource_start(pdev, epca_info_tbl[info_idx].bar_idx); |
| 2705 | if (!addr) { |
| 2706 | printk(KERN_ERR PFX "PCI region #%d not available (size 0)\n", |
| 2707 | epca_info_tbl[info_idx].bar_idx); |
| 2708 | goto err_out; |
| 2709 | } |
| 2710 | |
| 2711 | boards[board_idx].status = ENABLED; |
| 2712 | boards[board_idx].type = epca_info_tbl[info_idx].board_type; |
| 2713 | boards[board_idx].numports = 0x0; |
| 2714 | boards[board_idx].port = addr + PCI_IO_OFFSET; |
| 2715 | boards[board_idx].membase = addr; |
| 2716 | |
| 2717 | if (!request_mem_region(addr + PCI_IO_OFFSET, 0x200000, "epca")) { |
| 2718 | printk(KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n", |
| 2719 | 0x200000, addr + PCI_IO_OFFSET); |
| 2720 | goto err_out; |
| 2721 | } |
| 2722 | |
| 2723 | boards[board_idx].re_map_port = ioremap_nocache(addr + PCI_IO_OFFSET, |
| 2724 | 0x200000); |
| 2725 | if (!boards[board_idx].re_map_port) { |
| 2726 | printk(KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n", |
| 2727 | 0x200000, addr + PCI_IO_OFFSET); |
| 2728 | goto err_out_free_pciio; |
| 2729 | } |
| 2730 | |
| 2731 | if (!request_mem_region(addr, 0x200000, "epca")) { |
| 2732 | printk(KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n", |
| 2733 | 0x200000, addr); |
| 2734 | goto err_out_free_iounmap; |
| 2735 | } |
| 2736 | |
| 2737 | boards[board_idx].re_map_membase = ioremap_nocache(addr, 0x200000); |
| 2738 | if (!boards[board_idx].re_map_membase) { |
| 2739 | printk(KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n", |
| 2740 | 0x200000, addr + PCI_IO_OFFSET); |
| 2741 | goto err_out_free_memregion; |
| 2742 | } |
| 2743 | |
| 2744 | /* |
| 2745 | * I don't know what the below does, but the hardware guys say its |
| 2746 | * required on everything except PLX (In this case XRJ). |
| 2747 | */ |
| 2748 | if (info_idx != brd_xrj) { |
| 2749 | pci_write_config_byte(pdev, 0x40, 0); |
| 2750 | pci_write_config_byte(pdev, 0x46, 0); |
| 2751 | } |
| 2752 | |
| 2753 | return 0; |
| 2754 | |
| 2755 | err_out_free_memregion: |
| 2756 | release_mem_region(addr, 0x200000); |
| 2757 | err_out_free_iounmap: |
| 2758 | iounmap(boards[board_idx].re_map_port); |
| 2759 | err_out_free_pciio: |
| 2760 | release_mem_region(addr + PCI_IO_OFFSET, 0x200000); |
| 2761 | err_out: |
| 2762 | return -ENODEV; |
| 2763 | } |
| 2764 | |
| 2765 | |
| 2766 | static struct pci_device_id epca_pci_tbl[] = { |
| 2767 | { PCI_VENDOR_DIGI, PCI_DEVICE_XR, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xr }, |
| 2768 | { PCI_VENDOR_DIGI, PCI_DEVICE_XEM, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xem }, |
| 2769 | { PCI_VENDOR_DIGI, PCI_DEVICE_CX, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_cx }, |
| 2770 | { PCI_VENDOR_DIGI, PCI_DEVICE_XRJ, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xrj }, |
| 2771 | { 0, } |
| 2772 | }; |
| 2773 | |
| 2774 | MODULE_DEVICE_TABLE(pci, epca_pci_tbl); |
| 2775 | |
| 2776 | static int __init init_PCI(void) |
| 2777 | { |
| 2778 | memset(&epca_driver, 0, sizeof(epca_driver)); |
| 2779 | epca_driver.name = "epca"; |
| 2780 | epca_driver.id_table = epca_pci_tbl; |
| 2781 | epca_driver.probe = epca_init_one; |
| 2782 | |
| 2783 | return pci_register_driver(&epca_driver); |
| 2784 | } |
| 2785 | |
| 2786 | MODULE_LICENSE("GPL"); |