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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 | /* drivers/char/ser_a2232.c */ /* $Id: ser_a2232.c,v 0.4 2000/01/25 12:00:00 ehaase Exp $ */ /* Linux serial driver for the Amiga A2232 board */ /* This driver is MAINTAINED. Before applying any changes, please contact * the author. */ /* Copyright (c) 2000-2001 Enver Haase <ehaase@inf.fu-berlin.de> * alias The A2232 driver project <A2232@gmx.net> * All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * */ /***************************** Documentation ************************/ /* * This driver is in EXPERIMENTAL state. That means I could not find * someone with five A2232 boards with 35 ports running at 19200 bps * at the same time and test the machine's behaviour. * However, I know that you can performance-tweak this driver (see * the source code). * One thing to consider is the time this driver consumes during the * Amiga's vertical blank interrupt. Everything that is to be done * _IS DONE_ when entering the vertical blank interrupt handler of * this driver. * However, it would be more sane to only do the job for only ONE card * instead of ALL cards at a time; or, more generally, to handle only * SOME ports instead of ALL ports at a time. * However, as long as no-one runs into problems I guess I shouldn't * change the driver as it runs fine for me :) . * * Version history of this file: * 0.4 Resolved licensing issues. * 0.3 Inclusion in the Linux/m68k tree, small fixes. * 0.2 Added documentation, minor typo fixes. * 0.1 Initial release. * * TO DO: * - Handle incoming BREAK events. I guess "Stevens: Advanced * Programming in the UNIX(R) Environment" is a good reference * on what is to be done. * - When installing as a module, don't simply 'printk' text, but * send it to the TTY used by the user. * * THANKS TO: * - Jukka Marin (65EC02 code). * - The other NetBSD developers on whose A2232 driver I had a * pretty close look. However, I didn't copy any code so it * is okay to put my code under the GPL and include it into * Linux. */ /***************************** End of Documentation *****************/ /***************************** Defines ******************************/ /* * Enables experimental 115200 (normal) 230400 (turbo) baud rate. * The A2232 specification states it can only operate at speeds up to * 19200 bits per second, and I was not able to send a file via * "sz"/"rz" and a null-modem cable from one A2232 port to another * at 115200 bits per second. * However, this might work for you. */ #undef A2232_SPEEDHACK /* * Default is not to use RTS/CTS so you could be talked to death. */ #define A2232_SUPPRESS_RTSCTS_WARNING /************************* End of Defines ***************************/ /***************************** Includes *****************************/ #include <linux/module.h> #include <linux/types.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/tty.h> #include <asm/setup.h> #include <asm/amigaints.h> #include <asm/amigahw.h> #include <linux/zorro.h> #include <asm/irq.h> #include <linux/mutex.h> #include <linux/delay.h> #include <linux/serial.h> #include <linux/generic_serial.h> #include <linux/tty_flip.h> #include "ser_a2232.h" #include "ser_a2232fw.h" /************************* End of Includes **************************/ /***************************** Prototypes ***************************/ /* The interrupt service routine */ static irqreturn_t a2232_vbl_inter(int irq, void *data); /* Initialize the port structures */ static void a2232_init_portstructs(void); /* Initialize and register TTY drivers. */ /* returns 0 IFF successful */ static int a2232_init_drivers(void); /* BEGIN GENERIC_SERIAL PROTOTYPES */ static void a2232_disable_tx_interrupts(void *ptr); static void a2232_enable_tx_interrupts(void *ptr); static void a2232_disable_rx_interrupts(void *ptr); static void a2232_enable_rx_interrupts(void *ptr); static int a2232_carrier_raised(struct tty_port *port); static void a2232_shutdown_port(void *ptr); static int a2232_set_real_termios(void *ptr); static int a2232_chars_in_buffer(void *ptr); static void a2232_close(void *ptr); static void a2232_hungup(void *ptr); /* static void a2232_getserial (void *ptr, struct serial_struct *sp); */ /* END GENERIC_SERIAL PROTOTYPES */ /* Functions that the TTY driver struct expects */ static int a2232_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg); static void a2232_throttle(struct tty_struct *tty); static void a2232_unthrottle(struct tty_struct *tty); static int a2232_open(struct tty_struct * tty, struct file * filp); /************************* End of Prototypes ************************/ /***************************** Global variables *********************/ /*--------------------------------------------------------------------------- * Interface from generic_serial.c back here *--------------------------------------------------------------------------*/ static struct real_driver a2232_real_driver = { a2232_disable_tx_interrupts, a2232_enable_tx_interrupts, a2232_disable_rx_interrupts, a2232_enable_rx_interrupts, a2232_shutdown_port, a2232_set_real_termios, a2232_chars_in_buffer, a2232_close, a2232_hungup, NULL /* a2232_getserial */ }; static void *a2232_driver_ID = &a2232_driver_ID; // Some memory address WE own. /* Ports structs */ static struct a2232_port a2232_ports[MAX_A2232_BOARDS*NUMLINES]; /* TTY driver structs */ static struct tty_driver *a2232_driver; /* nr of cards completely (all ports) and correctly configured */ static int nr_a2232; /* zorro_dev structs for the A2232's */ static struct zorro_dev *zd_a2232[MAX_A2232_BOARDS]; /***************************** End of Global variables **************/ /* Helper functions */ static inline volatile struct a2232memory *a2232mem(unsigned int board) { return (volatile struct a2232memory *)ZTWO_VADDR(zd_a2232[board]->resource.start); } static inline volatile struct a2232status *a2232stat(unsigned int board, unsigned int portonboard) { volatile struct a2232memory *mem = a2232mem(board); return &(mem->Status[portonboard]); } static inline void a2232_receive_char(struct a2232_port *port, int ch, int err) { /* Mostly stolen from other drivers. Maybe one could implement a more efficient version by not only transferring one character at a time. */ struct tty_struct *tty = port->gs.port.tty; #if 0 switch(err) { case TTY_BREAK: break; case TTY_PARITY: break; case TTY_OVERRUN: break; case TTY_FRAME: break; } #endif tty_insert_flip_char(tty, ch, err); tty_flip_buffer_push(tty); } /***************************** Functions ****************************/ /*** BEGIN OF REAL_DRIVER FUNCTIONS ***/ static void a2232_disable_tx_interrupts(void *ptr) { struct a2232_port *port; volatile struct a2232status *stat; unsigned long flags; port = ptr; stat = a2232stat(port->which_a2232, port->which_port_on_a2232); stat->OutDisable = -1; /* Does this here really have to be? */ local_irq_save(flags); port->gs.port.flags &= ~GS_TX_INTEN; local_irq_restore(flags); } static void a2232_enable_tx_interrupts(void *ptr) { struct a2232_port *port; volatile struct a2232status *stat; unsigned long flags; port = ptr; stat = a2232stat(port->which_a2232, port->which_port_on_a2232); stat->OutDisable = 0; /* Does this here really have to be? */ local_irq_save(flags); port->gs.port.flags |= GS_TX_INTEN; local_irq_restore(flags); } static void a2232_disable_rx_interrupts(void *ptr) { struct a2232_port *port; port = ptr; port->disable_rx = -1; } static void a2232_enable_rx_interrupts(void *ptr) { struct a2232_port *port; port = ptr; port->disable_rx = 0; } static int a2232_carrier_raised(struct tty_port *port) { struct a2232_port *ap = container_of(port, struct a2232_port, gs.port); return ap->cd_status; } static void a2232_shutdown_port(void *ptr) { struct a2232_port *port; volatile struct a2232status *stat; unsigned long flags; port = ptr; stat = a2232stat(port->which_a2232, port->which_port_on_a2232); local_irq_save(flags); port->gs.port.flags &= ~GS_ACTIVE; if (port->gs.port.tty && port->gs.port.tty->termios->c_cflag & HUPCL) { /* Set DTR and RTS to Low, flush output. The NetBSD driver "msc.c" does it this way. */ stat->Command = ( (stat->Command & ~A2232CMD_CMask) | A2232CMD_Close ); stat->OutFlush = -1; stat->Setup = -1; } local_irq_restore(flags); /* After analyzing control flow, I think a2232_shutdown_port is actually the last call from the system when at application level someone issues a "echo Hello >>/dev/ttyY0". Therefore I think the MOD_DEC_USE_COUNT should be here and not in "a2232_close()". See the comment in "sx.c", too. If you run into problems, compile this driver into the kernel instead of compiling it as a module. */ } static int a2232_set_real_termios(void *ptr) { unsigned int cflag, baud, chsize, stopb, parity, softflow; int rate; int a2232_param, a2232_cmd; unsigned long flags; unsigned int i; struct a2232_port *port = ptr; volatile struct a2232status *status; volatile struct a2232memory *mem; if (!port->gs.port.tty || !port->gs.port.tty->termios) return 0; status = a2232stat(port->which_a2232, port->which_port_on_a2232); mem = a2232mem(port->which_a2232); a2232_param = a2232_cmd = 0; // get baud rate baud = port->gs.baud; if (baud == 0) { /* speed == 0 -> drop DTR, do nothing else */ local_irq_save(flags); // Clear DTR (and RTS... mhhh). status->Command = ( (status->Command & ~A2232CMD_CMask) | A2232CMD_Close ); status->OutFlush = -1; status->Setup = -1; local_irq_restore(flags); return 0; } rate = A2232_BAUD_TABLE_NOAVAIL; for (i=0; i < A2232_BAUD_TABLE_NUM_RATES * 3; i += 3){ if (a2232_baud_table[i] == baud){ if (mem->Common.Crystal == A2232_TURBO) rate = a2232_baud_table[i+2]; else rate = a2232_baud_table[i+1]; } } if (rate == A2232_BAUD_TABLE_NOAVAIL){ printk("a2232: Board %d Port %d unsupported baud rate: %d baud. Using another.\n",port->which_a2232,port->which_port_on_a2232,baud); // This is useful for both (turbo or normal) Crystal versions. rate = A2232PARAM_B9600; } a2232_param |= rate; cflag = port->gs.port.tty->termios->c_cflag; // get character size chsize = cflag & CSIZE; switch (chsize){ case CS8: a2232_param |= A2232PARAM_8Bit; break; case CS7: a2232_param |= A2232PARAM_7Bit; break; case CS6: a2232_param |= A2232PARAM_6Bit; break; case CS5: a2232_param |= A2232PARAM_5Bit; break; default: printk("a2232: Board %d Port %d unsupported character size: %d. Using 8 data bits.\n", port->which_a2232,port->which_port_on_a2232,chsize); a2232_param |= A2232PARAM_8Bit; break; } // get number of stop bits stopb = cflag & CSTOPB; if (stopb){ // two stop bits instead of one printk("a2232: Board %d Port %d 2 stop bits unsupported. Using 1 stop bit.\n", port->which_a2232,port->which_port_on_a2232); } // Warn if RTS/CTS not wanted if (!(cflag & CRTSCTS)){ #ifndef A2232_SUPPRESS_RTSCTS_WARNING printk("a2232: Board %d Port %d cannot switch off firmware-implemented RTS/CTS hardware flow control.\n", port->which_a2232,port->which_port_on_a2232); #endif } /* I think this is correct. However, IXOFF means _input_ flow control and I wonder if one should care about IXON _output_ flow control, too. If this makes problems, one should turn the A2232 firmware XON/XOFF "SoftFlow" flow control off and use the conventional way of inserting START/STOP characters by hand in throttle()/unthrottle(). */ softflow = !!( port->gs.port.tty->termios->c_iflag & IXOFF ); // get Parity (Enabled/Disabled? If Enabled, Odd or Even?) parity = cflag & (PARENB | PARODD); if (parity & PARENB){ if (parity & PARODD){ a2232_cmd |= A2232CMD_OddParity; } else{ a2232_cmd |= A2232CMD_EvenParity; } } else a2232_cmd |= A2232CMD_NoParity; /* Hmm. Maybe an own a2232_port structure member would be cleaner? */ if (cflag & CLOCAL) port->gs.port.flags &= ~ASYNC_CHECK_CD; else port->gs.port.flags |= ASYNC_CHECK_CD; /* Now we have all parameters and can go to set them: */ local_irq_save(flags); status->Param = a2232_param | A2232PARAM_RcvBaud; status->Command = a2232_cmd | A2232CMD_Open | A2232CMD_Enable; status->SoftFlow = softflow; status->OutDisable = 0; status->Setup = -1; local_irq_restore(flags); return 0; } static int a2232_chars_in_buffer(void *ptr) { struct a2232_port *port; volatile struct a2232status *status; unsigned char ret; /* we need modulo-256 arithmetics */ port = ptr; status = a2232stat(port->which_a2232, port->which_port_on_a2232); #if A2232_IOBUFLEN != 256 #error "Re-Implement a2232_chars_in_buffer()!" #endif ret = (status->OutHead - status->OutTail); return ret; } static void a2232_close(void *ptr) { a2232_disable_tx_interrupts(ptr); a2232_disable_rx_interrupts(ptr); /* see the comment in a2232_shutdown_port above. */ } static void a2232_hungup(void *ptr) { a2232_close(ptr); } /*** END OF REAL_DRIVER FUNCTIONS ***/ /*** BEGIN FUNCTIONS EXPECTED BY TTY DRIVER STRUCTS ***/ static int a2232_ioctl( struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) { return -ENOIOCTLCMD; } static void a2232_throttle(struct tty_struct *tty) { /* Throttle: System cannot take another chars: Drop RTS or send the STOP char or whatever. The A2232 firmware does RTS/CTS anyway, and XON/XOFF if switched on. So the only thing we can do at this layer here is not taking any characters out of the A2232 buffer any more. */ struct a2232_port *port = tty->driver_data; port->throttle_input = -1; } static void a2232_unthrottle(struct tty_struct *tty) { /* Unthrottle: dual to "throttle()" above. */ struct a2232_port *port = tty->driver_data; port->throttle_input = 0; } static int a2232_open(struct tty_struct * tty, struct file * filp) { /* More or less stolen from other drivers. */ int line; int retval; struct a2232_port *port; line = tty->index; port = &a2232_ports[line]; tty->driver_data = port; port->gs.port.tty = tty; port->gs.port.count++; retval = gs_init_port(&port->gs); if (retval) { port->gs.port.count--; return retval; } port->gs.port.flags |= GS_ACTIVE; retval = gs_block_til_ready(port, filp); if (retval) { port->gs.port.count--; return retval; } a2232_enable_rx_interrupts(port); return 0; } /*** END OF FUNCTIONS EXPECTED BY TTY DRIVER STRUCTS ***/ static irqreturn_t a2232_vbl_inter(int irq, void *data) { #if A2232_IOBUFLEN != 256 #error "Re-Implement a2232_vbl_inter()!" #endif struct a2232_port *port; volatile struct a2232memory *mem; volatile struct a2232status *status; unsigned char newhead; unsigned char bufpos; /* Must be unsigned char. We need the modulo-256 arithmetics */ unsigned char ncd, ocd, ccd; /* names consistent with the NetBSD driver */ volatile u_char *ibuf, *cbuf, *obuf; int ch, err, n, p; for (n = 0; n < nr_a2232; n++){ /* for every completely initialized A2232 board */ mem = a2232mem(n); for (p = 0; p < NUMLINES; p++){ /* for every port on this board */ err = 0; port = &a2232_ports[n*NUMLINES+p]; if ( port->gs.port.flags & GS_ACTIVE ){ /* if the port is used */ status = a2232stat(n,p); if (!port->disable_rx && !port->throttle_input){ /* If input is not disabled */ newhead = status->InHead; /* 65EC02 write pointer */ bufpos = status->InTail; /* check for input for this port */ if (newhead != bufpos) { /* buffer for input chars/events */ ibuf = mem->InBuf[p]; /* data types of bytes in ibuf */ cbuf = mem->InCtl[p]; /* do for all chars */ while (bufpos != newhead) { /* which type of input data? */ switch (cbuf[bufpos]) { /* switch on input event (CD, BREAK, etc.) */ case A2232INCTL_EVENT: switch (ibuf[bufpos++]) { case A2232EVENT_Break: /* TODO: Handle BREAK signal */ break; /* A2232EVENT_CarrierOn and A2232EVENT_CarrierOff are handled in a separate queue and should not occur here. */ case A2232EVENT_Sync: printk("A2232: 65EC02 software sent SYNC event, don't know what to do. Ignoring."); break; default: printk("A2232: 65EC02 software broken, unknown event type %d occurred.\n",ibuf[bufpos-1]); } /* event type switch */ break; case A2232INCTL_CHAR: /* Receive incoming char */ a2232_receive_char(port, ibuf[bufpos], err); bufpos++; break; default: printk("A2232: 65EC02 software broken, unknown data type %d occurred.\n",cbuf[bufpos]); bufpos++; } /* switch on input data type */ } /* while there's something in the buffer */ status->InTail = bufpos; /* tell 65EC02 what we've read */ } /* if there was something in the buffer */ } /* If input is not disabled */ /* Now check if there's something to output */ obuf = mem->OutBuf[p]; bufpos = status->OutHead; while ( (port->gs.xmit_cnt > 0) && (!port->gs.port.tty->stopped) && (!port->gs.port.tty->hw_stopped) ){ /* While there are chars to transmit */ if (((bufpos+1) & A2232_IOBUFLENMASK) != status->OutTail) { /* If the A2232 buffer is not full */ ch = port->gs.xmit_buf[port->gs.xmit_tail]; /* get the next char to transmit */ port->gs.xmit_tail = (port->gs.xmit_tail+1) & (SERIAL_XMIT_SIZE-1); /* modulo-addition for the gs.xmit_buf ring-buffer */ obuf[bufpos++] = ch; /* put it into the A2232 buffer */ port->gs.xmit_cnt--; } else{ /* If A2232 the buffer is full */ break; /* simply stop filling it. */ } } status->OutHead = bufpos; /* WakeUp if output buffer runs low */ if ((port->gs.xmit_cnt <= port->gs.wakeup_chars) && port->gs.port.tty) { tty_wakeup(port->gs.port.tty); } } // if the port is used } // for every port on the board /* Now check the CD message queue */ newhead = mem->Common.CDHead; bufpos = mem->Common.CDTail; if (newhead != bufpos){ /* There are CD events in queue */ ocd = mem->Common.CDStatus; /* get old status bits */ while (newhead != bufpos){ /* read all events */ ncd = mem->CDBuf[bufpos++]; /* get one event */ ccd = ncd ^ ocd; /* mask of changed lines */ ocd = ncd; /* save new status bits */ for(p=0; p < NUMLINES; p++){ /* for all ports */ if (ccd & 1){ /* this one changed */ struct a2232_port *port = &a2232_ports[n*7+p]; port->cd_status = !(ncd & 1); /* ncd&1 <=> CD is now off */ if (!(port->gs.port.flags & ASYNC_CHECK_CD)) ; /* Don't report DCD changes */ else if (port->cd_status) { // if DCD on: DCD went UP! /* Are we blocking in open?*/ wake_up_interruptible(&port->gs.port.open_wait); } else { // if DCD off: DCD went DOWN! if (port->gs.port.tty) tty_hangup (port->gs.port.tty); } } // if CD changed for this port ccd >>= 1; ncd >>= 1; /* Shift bits for next line */ } // for every port } // while CD events in queue mem->Common.CDStatus = ocd; /* save new status */ mem->Common.CDTail = bufpos; /* remove events */ } // if events in CD queue } // for every completely initialized A2232 board return IRQ_HANDLED; } static const struct tty_port_operations a2232_port_ops = { .carrier_raised = a2232_carrier_raised, }; static void a2232_init_portstructs(void) { struct a2232_port *port; int i; for (i = 0; i < MAX_A2232_BOARDS*NUMLINES; i++) { port = a2232_ports + i; tty_port_init(&port->gs.port); port->gs.port.ops = &a2232_port_ops; port->which_a2232 = i/NUMLINES; port->which_port_on_a2232 = i%NUMLINES; port->disable_rx = port->throttle_input = port->cd_status = 0; port->gs.magic = A2232_MAGIC; port->gs.close_delay = HZ/2; port->gs.closing_wait = 30 * HZ; port->gs.rd = &a2232_real_driver; } } static const struct tty_operations a2232_ops = { .open = a2232_open, .close = gs_close, .write = gs_write, .put_char = gs_put_char, .flush_chars = gs_flush_chars, .write_room = gs_write_room, .chars_in_buffer = gs_chars_in_buffer, .flush_buffer = gs_flush_buffer, .ioctl = a2232_ioctl, .throttle = a2232_throttle, .unthrottle = a2232_unthrottle, .set_termios = gs_set_termios, .stop = gs_stop, .start = gs_start, .hangup = gs_hangup, }; static int a2232_init_drivers(void) { int error; a2232_driver = alloc_tty_driver(NUMLINES * nr_a2232); if (!a2232_driver) return -ENOMEM; a2232_driver->owner = THIS_MODULE; a2232_driver->driver_name = "commodore_a2232"; a2232_driver->name = "ttyY"; a2232_driver->major = A2232_NORMAL_MAJOR; a2232_driver->type = TTY_DRIVER_TYPE_SERIAL; a2232_driver->subtype = SERIAL_TYPE_NORMAL; a2232_driver->init_termios = tty_std_termios; a2232_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; a2232_driver->init_termios.c_ispeed = 9600; a2232_driver->init_termios.c_ospeed = 9600; a2232_driver->flags = TTY_DRIVER_REAL_RAW; tty_set_operations(a2232_driver, &a2232_ops); if ((error = tty_register_driver(a2232_driver))) { printk(KERN_ERR "A2232: Couldn't register A2232 driver, error = %d\n", error); put_tty_driver(a2232_driver); return 1; } return 0; } static int __init a2232board_init(void) { struct zorro_dev *z; unsigned int boardaddr; int bcount; short start; u_char *from; volatile u_char *to; volatile struct a2232memory *mem; int error, i; #ifdef CONFIG_SMP return -ENODEV; /* This driver is not SMP aware. Is there an SMP ZorroII-bus-machine? */ #endif if (!MACH_IS_AMIGA){ return -ENODEV; } printk("Commodore A2232 driver initializing.\n"); /* Say that we're alive. */ z = NULL; nr_a2232 = 0; while ( (z = zorro_find_device(ZORRO_WILDCARD, z)) ){ if ( (z->id != ZORRO_PROD_CBM_A2232_PROTOTYPE) && (z->id != ZORRO_PROD_CBM_A2232) ){ continue; // The board found was no A2232 } if (!zorro_request_device(z,"A2232 driver")) continue; printk("Commodore A2232 found (#%d).\n",nr_a2232); zd_a2232[nr_a2232] = z; boardaddr = ZTWO_VADDR( z->resource.start ); printk("Board is located at address 0x%x, size is 0x%x.\n", boardaddr, (unsigned int) ((z->resource.end+1) - (z->resource.start))); mem = (volatile struct a2232memory *) boardaddr; (void) mem->Enable6502Reset; /* copy the code across to the board */ to = (u_char *)mem; from = a2232_65EC02code; bcount = sizeof(a2232_65EC02code) - 2; start = *(short *)from; from += sizeof(start); to += start; while(bcount--) *to++ = *from++; printk("65EC02 software uploaded to the A2232 memory.\n"); mem->Common.Crystal = A2232_UNKNOWN; /* use automatic speed check */ /* start 6502 running */ (void) mem->ResetBoard; printk("A2232's 65EC02 CPU up and running.\n"); /* wait until speed detector has finished */ for (bcount = 0; bcount < 2000; bcount++) { udelay(1000); if (mem->Common.Crystal) break; } printk((mem->Common.Crystal?"A2232 oscillator crystal detected by 65EC02 software: ":"65EC02 software could not determine A2232 oscillator crystal: ")); switch (mem->Common.Crystal){ case A2232_UNKNOWN: printk("Unknown crystal.\n"); break; case A2232_NORMAL: printk ("Normal crystal.\n"); break; case A2232_TURBO: printk ("Turbo crystal.\n"); break; default: printk ("0x%x. Huh?\n",mem->Common.Crystal); } nr_a2232++; } printk("Total: %d A2232 boards initialized.\n", nr_a2232); /* Some status report if no card was found */ a2232_init_portstructs(); /* a2232_init_drivers also registers the drivers. Must be here because all boards have to be detected first. */ if (a2232_init_drivers()) return -ENODEV; // maybe we should use a different -Exxx? error = request_irq(IRQ_AMIGA_VERTB, a2232_vbl_inter, 0, "A2232 serial VBL", a2232_driver_ID); if (error) { for (i = 0; i < nr_a2232; i++) zorro_release_device(zd_a2232[i]); tty_unregister_driver(a2232_driver); put_tty_driver(a2232_driver); } return error; } static void __exit a2232board_exit(void) { int i; for (i = 0; i < nr_a2232; i++) { zorro_release_device(zd_a2232[i]); } tty_unregister_driver(a2232_driver); put_tty_driver(a2232_driver); free_irq(IRQ_AMIGA_VERTB, a2232_driver_ID); } module_init(a2232board_init); module_exit(a2232board_exit); MODULE_AUTHOR("Enver Haase"); MODULE_DESCRIPTION("Amiga A2232 multi-serial board driver"); MODULE_LICENSE("GPL"); |