1 /*****************************************************************************/ 2 /* 3 * moxa.c -- MOXA Intellio family multiport serial driver. 4 * 5 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com). 6 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com> 7 * 8 * This code is loosely based on the Linux serial driver, written by 9 * Linus Torvalds, Theodore T'so and others. 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 */ 16 17 /* 18 * MOXA Intellio Series Driver 19 * for : LINUX 20 * date : 1999/1/7 21 * version : 5.1 22 */ 23 24 #include <linux/module.h> 25 #include <linux/types.h> 26 #include <linux/mm.h> 27 #include <linux/ioport.h> 28 #include <linux/errno.h> 29 #include <linux/firmware.h> 30 #include <linux/signal.h> 31 #include <linux/sched.h> 32 #include <linux/timer.h> 33 #include <linux/interrupt.h> 34 #include <linux/tty.h> 35 #include <linux/tty_flip.h> 36 #include <linux/major.h> 37 #include <linux/string.h> 38 #include <linux/fcntl.h> 39 #include <linux/ptrace.h> 40 #include <linux/serial.h> 41 #include <linux/tty_driver.h> 42 #include <linux/delay.h> 43 #include <linux/pci.h> 44 #include <linux/init.h> 45 #include <linux/bitops.h> 46 #include <linux/slab.h> 47 #include <linux/ratelimit.h> 48 49 #include <asm/system.h> 50 #include <asm/io.h> 51 #include <asm/uaccess.h> 52 53 #include "moxa.h" 54 55 #define MOXA_VERSION "6.0k" 56 57 #define MOXA_FW_HDRLEN 32 58 59 #define MOXAMAJOR 172 60 61 #define MAX_BOARDS 4 /* Don't change this value */ 62 #define MAX_PORTS_PER_BOARD 32 /* Don't change this value */ 63 #define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD) 64 65 #define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \ 66 (brd)->boardType == MOXA_BOARD_C320_PCI) 67 68 /* 69 * Define the Moxa PCI vendor and device IDs. 70 */ 71 #define MOXA_BUS_TYPE_ISA 0 72 #define MOXA_BUS_TYPE_PCI 1 73 74 enum { 75 MOXA_BOARD_C218_PCI = 1, 76 MOXA_BOARD_C218_ISA, 77 MOXA_BOARD_C320_PCI, 78 MOXA_BOARD_C320_ISA, 79 MOXA_BOARD_CP204J, 80 }; 81 82 static char *moxa_brdname[] = 83 { 84 "C218 Turbo PCI series", 85 "C218 Turbo ISA series", 86 "C320 Turbo PCI series", 87 "C320 Turbo ISA series", 88 "CP-204J series", 89 }; 90 91 #ifdef CONFIG_PCI 92 static struct pci_device_id moxa_pcibrds[] = { 93 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218), 94 .driver_data = MOXA_BOARD_C218_PCI }, 95 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320), 96 .driver_data = MOXA_BOARD_C320_PCI }, 97 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J), 98 .driver_data = MOXA_BOARD_CP204J }, 99 { 0 } 100 }; 101 MODULE_DEVICE_TABLE(pci, moxa_pcibrds); 102 #endif /* CONFIG_PCI */ 103 104 struct moxa_port; 105 106 static struct moxa_board_conf { 107 int boardType; 108 int numPorts; 109 int busType; 110 111 unsigned int ready; 112 113 struct moxa_port *ports; 114 115 void __iomem *basemem; 116 void __iomem *intNdx; 117 void __iomem *intPend; 118 void __iomem *intTable; 119 } moxa_boards[MAX_BOARDS]; 120 121 struct mxser_mstatus { 122 tcflag_t cflag; 123 int cts; 124 int dsr; 125 int ri; 126 int dcd; 127 }; 128 129 struct moxaq_str { 130 int inq; 131 int outq; 132 }; 133 134 struct moxa_port { 135 struct tty_port port; 136 struct moxa_board_conf *board; 137 void __iomem *tableAddr; 138 139 int type; 140 int cflag; 141 unsigned long statusflags; 142 143 u8 DCDState; /* Protected by the port lock */ 144 u8 lineCtrl; 145 u8 lowChkFlag; 146 }; 147 148 struct mon_str { 149 int tick; 150 int rxcnt[MAX_PORTS]; 151 int txcnt[MAX_PORTS]; 152 }; 153 154 /* statusflags */ 155 #define TXSTOPPED 1 156 #define LOWWAIT 2 157 #define EMPTYWAIT 3 158 159 #define SERIAL_DO_RESTART 160 161 #define WAKEUP_CHARS 256 162 163 static int ttymajor = MOXAMAJOR; 164 static struct mon_str moxaLog; 165 static unsigned int moxaFuncTout = HZ / 2; 166 static unsigned int moxaLowWaterChk; 167 static DEFINE_MUTEX(moxa_openlock); 168 static DEFINE_SPINLOCK(moxa_lock); 169 170 static unsigned long baseaddr[MAX_BOARDS]; 171 static unsigned int type[MAX_BOARDS]; 172 static unsigned int numports[MAX_BOARDS]; 173 174 MODULE_AUTHOR("William Chen"); 175 MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver"); 176 MODULE_LICENSE("GPL"); 177 MODULE_FIRMWARE("c218tunx.cod"); 178 MODULE_FIRMWARE("cp204unx.cod"); 179 MODULE_FIRMWARE("c320tunx.cod"); 180 181 module_param_array(type, uint, NULL, 0); 182 MODULE_PARM_DESC(type, "card type: C218=2, C320=4"); 183 module_param_array(baseaddr, ulong, NULL, 0); 184 MODULE_PARM_DESC(baseaddr, "base address"); 185 module_param_array(numports, uint, NULL, 0); 186 MODULE_PARM_DESC(numports, "numports (ignored for C218)"); 187 188 module_param(ttymajor, int, 0); 189 190 /* 191 * static functions: 192 */ 193 static int moxa_open(struct tty_struct *, struct file *); 194 static void moxa_close(struct tty_struct *, struct file *); 195 static int moxa_write(struct tty_struct *, const unsigned char *, int); 196 static int moxa_write_room(struct tty_struct *); 197 static void moxa_flush_buffer(struct tty_struct *); 198 static int moxa_chars_in_buffer(struct tty_struct *); 199 static void moxa_set_termios(struct tty_struct *, struct ktermios *); 200 static void moxa_stop(struct tty_struct *); 201 static void moxa_start(struct tty_struct *); 202 static void moxa_hangup(struct tty_struct *); 203 static int moxa_tiocmget(struct tty_struct *tty); 204 static int moxa_tiocmset(struct tty_struct *tty, 205 unsigned int set, unsigned int clear); 206 static void moxa_poll(unsigned long); 207 static void moxa_set_tty_param(struct tty_struct *, struct ktermios *); 208 static void moxa_shutdown(struct tty_port *); 209 static int moxa_carrier_raised(struct tty_port *); 210 static void moxa_dtr_rts(struct tty_port *, int); 211 /* 212 * moxa board interface functions: 213 */ 214 static void MoxaPortEnable(struct moxa_port *); 215 static void MoxaPortDisable(struct moxa_port *); 216 static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t); 217 static int MoxaPortGetLineOut(struct moxa_port *, int *, int *); 218 static void MoxaPortLineCtrl(struct moxa_port *, int, int); 219 static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int); 220 static int MoxaPortLineStatus(struct moxa_port *); 221 static void MoxaPortFlushData(struct moxa_port *, int); 222 static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int); 223 static int MoxaPortReadData(struct moxa_port *); 224 static int MoxaPortTxQueue(struct moxa_port *); 225 static int MoxaPortRxQueue(struct moxa_port *); 226 static int MoxaPortTxFree(struct moxa_port *); 227 static void MoxaPortTxDisable(struct moxa_port *); 228 static void MoxaPortTxEnable(struct moxa_port *); 229 static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *); 230 static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *); 231 static void MoxaSetFifo(struct moxa_port *port, int enable); 232 233 /* 234 * I/O functions 235 */ 236 237 static DEFINE_SPINLOCK(moxafunc_lock); 238 239 static void moxa_wait_finish(void __iomem *ofsAddr) 240 { 241 unsigned long end = jiffies + moxaFuncTout; 242 243 while (readw(ofsAddr + FuncCode) != 0) 244 if (time_after(jiffies, end)) 245 return; 246 if (readw(ofsAddr + FuncCode) != 0) 247 printk_ratelimited(KERN_WARNING "moxa function expired\n"); 248 } 249 250 static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg) 251 { 252 unsigned long flags; 253 spin_lock_irqsave(&moxafunc_lock, flags); 254 writew(arg, ofsAddr + FuncArg); 255 writew(cmd, ofsAddr + FuncCode); 256 moxa_wait_finish(ofsAddr); 257 spin_unlock_irqrestore(&moxafunc_lock, flags); 258 } 259 260 static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg) 261 { 262 unsigned long flags; 263 u16 ret; 264 spin_lock_irqsave(&moxafunc_lock, flags); 265 writew(arg, ofsAddr + FuncArg); 266 writew(cmd, ofsAddr + FuncCode); 267 moxa_wait_finish(ofsAddr); 268 ret = readw(ofsAddr + FuncArg); 269 spin_unlock_irqrestore(&moxafunc_lock, flags); 270 return ret; 271 } 272 273 static void moxa_low_water_check(void __iomem *ofsAddr) 274 { 275 u16 rptr, wptr, mask, len; 276 277 if (readb(ofsAddr + FlagStat) & Xoff_state) { 278 rptr = readw(ofsAddr + RXrptr); 279 wptr = readw(ofsAddr + RXwptr); 280 mask = readw(ofsAddr + RX_mask); 281 len = (wptr - rptr) & mask; 282 if (len <= Low_water) 283 moxafunc(ofsAddr, FC_SendXon, 0); 284 } 285 } 286 287 /* 288 * TTY operations 289 */ 290 291 static int moxa_ioctl(struct tty_struct *tty, 292 unsigned int cmd, unsigned long arg) 293 { 294 struct moxa_port *ch = tty->driver_data; 295 void __user *argp = (void __user *)arg; 296 int status, ret = 0; 297 298 if (tty->index == MAX_PORTS) { 299 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE && 300 cmd != MOXA_GETMSTATUS) 301 return -EINVAL; 302 } else if (!ch) 303 return -ENODEV; 304 305 switch (cmd) { 306 case MOXA_GETDATACOUNT: 307 moxaLog.tick = jiffies; 308 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog))) 309 ret = -EFAULT; 310 break; 311 case MOXA_FLUSH_QUEUE: 312 MoxaPortFlushData(ch, arg); 313 break; 314 case MOXA_GET_IOQUEUE: { 315 struct moxaq_str __user *argm = argp; 316 struct moxaq_str tmp; 317 struct moxa_port *p; 318 unsigned int i, j; 319 320 for (i = 0; i < MAX_BOARDS; i++) { 321 p = moxa_boards[i].ports; 322 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) { 323 memset(&tmp, 0, sizeof(tmp)); 324 spin_lock_bh(&moxa_lock); 325 if (moxa_boards[i].ready) { 326 tmp.inq = MoxaPortRxQueue(p); 327 tmp.outq = MoxaPortTxQueue(p); 328 } 329 spin_unlock_bh(&moxa_lock); 330 if (copy_to_user(argm, &tmp, sizeof(tmp))) 331 return -EFAULT; 332 } 333 } 334 break; 335 } case MOXA_GET_OQUEUE: 336 status = MoxaPortTxQueue(ch); 337 ret = put_user(status, (unsigned long __user *)argp); 338 break; 339 case MOXA_GET_IQUEUE: 340 status = MoxaPortRxQueue(ch); 341 ret = put_user(status, (unsigned long __user *)argp); 342 break; 343 case MOXA_GETMSTATUS: { 344 struct mxser_mstatus __user *argm = argp; 345 struct mxser_mstatus tmp; 346 struct moxa_port *p; 347 unsigned int i, j; 348 349 for (i = 0; i < MAX_BOARDS; i++) { 350 p = moxa_boards[i].ports; 351 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) { 352 struct tty_struct *ttyp; 353 memset(&tmp, 0, sizeof(tmp)); 354 spin_lock_bh(&moxa_lock); 355 if (!moxa_boards[i].ready) { 356 spin_unlock_bh(&moxa_lock); 357 goto copy; 358 } 359 360 status = MoxaPortLineStatus(p); 361 spin_unlock_bh(&moxa_lock); 362 363 if (status & 1) 364 tmp.cts = 1; 365 if (status & 2) 366 tmp.dsr = 1; 367 if (status & 4) 368 tmp.dcd = 1; 369 370 ttyp = tty_port_tty_get(&p->port); 371 if (!ttyp || !ttyp->termios) 372 tmp.cflag = p->cflag; 373 else 374 tmp.cflag = ttyp->termios->c_cflag; 375 tty_kref_put(ttyp); 376 copy: 377 if (copy_to_user(argm, &tmp, sizeof(tmp))) 378 return -EFAULT; 379 } 380 } 381 break; 382 } 383 case TIOCGSERIAL: 384 mutex_lock(&ch->port.mutex); 385 ret = moxa_get_serial_info(ch, argp); 386 mutex_unlock(&ch->port.mutex); 387 break; 388 case TIOCSSERIAL: 389 mutex_lock(&ch->port.mutex); 390 ret = moxa_set_serial_info(ch, argp); 391 mutex_unlock(&ch->port.mutex); 392 break; 393 default: 394 ret = -ENOIOCTLCMD; 395 } 396 return ret; 397 } 398 399 static int moxa_break_ctl(struct tty_struct *tty, int state) 400 { 401 struct moxa_port *port = tty->driver_data; 402 403 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak, 404 Magic_code); 405 return 0; 406 } 407 408 static const struct tty_operations moxa_ops = { 409 .open = moxa_open, 410 .close = moxa_close, 411 .write = moxa_write, 412 .write_room = moxa_write_room, 413 .flush_buffer = moxa_flush_buffer, 414 .chars_in_buffer = moxa_chars_in_buffer, 415 .ioctl = moxa_ioctl, 416 .set_termios = moxa_set_termios, 417 .stop = moxa_stop, 418 .start = moxa_start, 419 .hangup = moxa_hangup, 420 .break_ctl = moxa_break_ctl, 421 .tiocmget = moxa_tiocmget, 422 .tiocmset = moxa_tiocmset, 423 }; 424 425 static const struct tty_port_operations moxa_port_ops = { 426 .carrier_raised = moxa_carrier_raised, 427 .dtr_rts = moxa_dtr_rts, 428 .shutdown = moxa_shutdown, 429 }; 430 431 static struct tty_driver *moxaDriver; 432 static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0); 433 434 /* 435 * HW init 436 */ 437 438 static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model) 439 { 440 switch (brd->boardType) { 441 case MOXA_BOARD_C218_ISA: 442 case MOXA_BOARD_C218_PCI: 443 if (model != 1) 444 goto err; 445 break; 446 case MOXA_BOARD_CP204J: 447 if (model != 3) 448 goto err; 449 break; 450 default: 451 if (model != 2) 452 goto err; 453 break; 454 } 455 return 0; 456 err: 457 return -EINVAL; 458 } 459 460 static int moxa_check_fw(const void *ptr) 461 { 462 const __le16 *lptr = ptr; 463 464 if (*lptr != cpu_to_le16(0x7980)) 465 return -EINVAL; 466 467 return 0; 468 } 469 470 static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf, 471 size_t len) 472 { 473 void __iomem *baseAddr = brd->basemem; 474 u16 tmp; 475 476 writeb(HW_reset, baseAddr + Control_reg); /* reset */ 477 msleep(10); 478 memset_io(baseAddr, 0, 4096); 479 memcpy_toio(baseAddr, buf, len); /* download BIOS */ 480 writeb(0, baseAddr + Control_reg); /* restart */ 481 482 msleep(2000); 483 484 switch (brd->boardType) { 485 case MOXA_BOARD_C218_ISA: 486 case MOXA_BOARD_C218_PCI: 487 tmp = readw(baseAddr + C218_key); 488 if (tmp != C218_KeyCode) 489 goto err; 490 break; 491 case MOXA_BOARD_CP204J: 492 tmp = readw(baseAddr + C218_key); 493 if (tmp != CP204J_KeyCode) 494 goto err; 495 break; 496 default: 497 tmp = readw(baseAddr + C320_key); 498 if (tmp != C320_KeyCode) 499 goto err; 500 tmp = readw(baseAddr + C320_status); 501 if (tmp != STS_init) { 502 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic " 503 "module not found\n"); 504 return -EIO; 505 } 506 break; 507 } 508 509 return 0; 510 err: 511 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n"); 512 return -EIO; 513 } 514 515 static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr, 516 size_t len) 517 { 518 void __iomem *baseAddr = brd->basemem; 519 520 if (len < 7168) { 521 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n"); 522 return -EINVAL; 523 } 524 525 writew(len - 7168 - 2, baseAddr + C320bapi_len); 526 writeb(1, baseAddr + Control_reg); /* Select Page 1 */ 527 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168); 528 writeb(2, baseAddr + Control_reg); /* Select Page 2 */ 529 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168); 530 531 return 0; 532 } 533 534 static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr, 535 size_t len) 536 { 537 void __iomem *baseAddr = brd->basemem; 538 const __le16 *uptr = ptr; 539 size_t wlen, len2, j; 540 unsigned long key, loadbuf, loadlen, checksum, checksum_ok; 541 unsigned int i, retry; 542 u16 usum, keycode; 543 544 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode : 545 C218_KeyCode; 546 547 switch (brd->boardType) { 548 case MOXA_BOARD_CP204J: 549 case MOXA_BOARD_C218_ISA: 550 case MOXA_BOARD_C218_PCI: 551 key = C218_key; 552 loadbuf = C218_LoadBuf; 553 loadlen = C218DLoad_len; 554 checksum = C218check_sum; 555 checksum_ok = C218chksum_ok; 556 break; 557 default: 558 key = C320_key; 559 keycode = C320_KeyCode; 560 loadbuf = C320_LoadBuf; 561 loadlen = C320DLoad_len; 562 checksum = C320check_sum; 563 checksum_ok = C320chksum_ok; 564 break; 565 } 566 567 usum = 0; 568 wlen = len >> 1; 569 for (i = 0; i < wlen; i++) 570 usum += le16_to_cpu(uptr[i]); 571 retry = 0; 572 do { 573 wlen = len >> 1; 574 j = 0; 575 while (wlen) { 576 len2 = (wlen > 2048) ? 2048 : wlen; 577 wlen -= len2; 578 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1); 579 j += len2 << 1; 580 581 writew(len2, baseAddr + loadlen); 582 writew(0, baseAddr + key); 583 for (i = 0; i < 100; i++) { 584 if (readw(baseAddr + key) == keycode) 585 break; 586 msleep(10); 587 } 588 if (readw(baseAddr + key) != keycode) 589 return -EIO; 590 } 591 writew(0, baseAddr + loadlen); 592 writew(usum, baseAddr + checksum); 593 writew(0, baseAddr + key); 594 for (i = 0; i < 100; i++) { 595 if (readw(baseAddr + key) == keycode) 596 break; 597 msleep(10); 598 } 599 retry++; 600 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3)); 601 if (readb(baseAddr + checksum_ok) != 1) 602 return -EIO; 603 604 writew(0, baseAddr + key); 605 for (i = 0; i < 600; i++) { 606 if (readw(baseAddr + Magic_no) == Magic_code) 607 break; 608 msleep(10); 609 } 610 if (readw(baseAddr + Magic_no) != Magic_code) 611 return -EIO; 612 613 if (MOXA_IS_320(brd)) { 614 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */ 615 writew(0x3800, baseAddr + TMS320_PORT1); 616 writew(0x3900, baseAddr + TMS320_PORT2); 617 writew(28499, baseAddr + TMS320_CLOCK); 618 } else { 619 writew(0x3200, baseAddr + TMS320_PORT1); 620 writew(0x3400, baseAddr + TMS320_PORT2); 621 writew(19999, baseAddr + TMS320_CLOCK); 622 } 623 } 624 writew(1, baseAddr + Disable_IRQ); 625 writew(0, baseAddr + Magic_no); 626 for (i = 0; i < 500; i++) { 627 if (readw(baseAddr + Magic_no) == Magic_code) 628 break; 629 msleep(10); 630 } 631 if (readw(baseAddr + Magic_no) != Magic_code) 632 return -EIO; 633 634 if (MOXA_IS_320(brd)) { 635 j = readw(baseAddr + Module_cnt); 636 if (j <= 0) 637 return -EIO; 638 brd->numPorts = j * 8; 639 writew(j, baseAddr + Module_no); 640 writew(0, baseAddr + Magic_no); 641 for (i = 0; i < 600; i++) { 642 if (readw(baseAddr + Magic_no) == Magic_code) 643 break; 644 msleep(10); 645 } 646 if (readw(baseAddr + Magic_no) != Magic_code) 647 return -EIO; 648 } 649 brd->intNdx = baseAddr + IRQindex; 650 brd->intPend = baseAddr + IRQpending; 651 brd->intTable = baseAddr + IRQtable; 652 653 return 0; 654 } 655 656 static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr, 657 size_t len) 658 { 659 void __iomem *ofsAddr, *baseAddr = brd->basemem; 660 struct moxa_port *port; 661 int retval, i; 662 663 if (len % 2) { 664 printk(KERN_ERR "MOXA: bios length is not even\n"); 665 return -EINVAL; 666 } 667 668 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */ 669 if (retval) 670 return retval; 671 672 switch (brd->boardType) { 673 case MOXA_BOARD_C218_ISA: 674 case MOXA_BOARD_C218_PCI: 675 case MOXA_BOARD_CP204J: 676 port = brd->ports; 677 for (i = 0; i < brd->numPorts; i++, port++) { 678 port->board = brd; 679 port->DCDState = 0; 680 port->tableAddr = baseAddr + Extern_table + 681 Extern_size * i; 682 ofsAddr = port->tableAddr; 683 writew(C218rx_mask, ofsAddr + RX_mask); 684 writew(C218tx_mask, ofsAddr + TX_mask); 685 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb); 686 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb); 687 688 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb); 689 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb); 690 691 } 692 break; 693 default: 694 port = brd->ports; 695 for (i = 0; i < brd->numPorts; i++, port++) { 696 port->board = brd; 697 port->DCDState = 0; 698 port->tableAddr = baseAddr + Extern_table + 699 Extern_size * i; 700 ofsAddr = port->tableAddr; 701 switch (brd->numPorts) { 702 case 8: 703 writew(C320p8rx_mask, ofsAddr + RX_mask); 704 writew(C320p8tx_mask, ofsAddr + TX_mask); 705 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb); 706 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb); 707 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb); 708 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb); 709 710 break; 711 case 16: 712 writew(C320p16rx_mask, ofsAddr + RX_mask); 713 writew(C320p16tx_mask, ofsAddr + TX_mask); 714 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb); 715 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb); 716 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb); 717 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb); 718 break; 719 720 case 24: 721 writew(C320p24rx_mask, ofsAddr + RX_mask); 722 writew(C320p24tx_mask, ofsAddr + TX_mask); 723 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb); 724 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb); 725 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb); 726 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb); 727 break; 728 case 32: 729 writew(C320p32rx_mask, ofsAddr + RX_mask); 730 writew(C320p32tx_mask, ofsAddr + TX_mask); 731 writew(C320p32tx_ofs, ofsAddr + Ofs_txb); 732 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb); 733 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb); 734 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb); 735 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb); 736 break; 737 } 738 } 739 break; 740 } 741 return 0; 742 } 743 744 static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw) 745 { 746 const void *ptr = fw->data; 747 char rsn[64]; 748 u16 lens[5]; 749 size_t len; 750 unsigned int a, lenp, lencnt; 751 int ret = -EINVAL; 752 struct { 753 __le32 magic; /* 0x34303430 */ 754 u8 reserved1[2]; 755 u8 type; /* UNIX = 3 */ 756 u8 model; /* C218T=1, C320T=2, CP204=3 */ 757 u8 reserved2[8]; 758 __le16 len[5]; 759 } const *hdr = ptr; 760 761 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens)); 762 763 if (fw->size < MOXA_FW_HDRLEN) { 764 strcpy(rsn, "too short (even header won't fit)"); 765 goto err; 766 } 767 if (hdr->magic != cpu_to_le32(0x30343034)) { 768 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic)); 769 goto err; 770 } 771 if (hdr->type != 3) { 772 sprintf(rsn, "not for linux, type is %u", hdr->type); 773 goto err; 774 } 775 if (moxa_check_fw_model(brd, hdr->model)) { 776 sprintf(rsn, "not for this card, model is %u", hdr->model); 777 goto err; 778 } 779 780 len = MOXA_FW_HDRLEN; 781 lencnt = hdr->model == 2 ? 5 : 3; 782 for (a = 0; a < ARRAY_SIZE(lens); a++) { 783 lens[a] = le16_to_cpu(hdr->len[a]); 784 if (lens[a] && len + lens[a] <= fw->size && 785 moxa_check_fw(&fw->data[len])) 786 printk(KERN_WARNING "MOXA firmware: unexpected input " 787 "at offset %u, but going on\n", (u32)len); 788 if (!lens[a] && a < lencnt) { 789 sprintf(rsn, "too few entries in fw file"); 790 goto err; 791 } 792 len += lens[a]; 793 } 794 795 if (len != fw->size) { 796 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size, 797 (u32)len); 798 goto err; 799 } 800 801 ptr += MOXA_FW_HDRLEN; 802 lenp = 0; /* bios */ 803 804 strcpy(rsn, "read above"); 805 806 ret = moxa_load_bios(brd, ptr, lens[lenp]); 807 if (ret) 808 goto err; 809 810 /* we skip the tty section (lens[1]), since we don't need it */ 811 ptr += lens[lenp] + lens[lenp + 1]; 812 lenp += 2; /* comm */ 813 814 if (hdr->model == 2) { 815 ret = moxa_load_320b(brd, ptr, lens[lenp]); 816 if (ret) 817 goto err; 818 /* skip another tty */ 819 ptr += lens[lenp] + lens[lenp + 1]; 820 lenp += 2; 821 } 822 823 ret = moxa_load_code(brd, ptr, lens[lenp]); 824 if (ret) 825 goto err; 826 827 return 0; 828 err: 829 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn); 830 return ret; 831 } 832 833 static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev) 834 { 835 const struct firmware *fw; 836 const char *file; 837 struct moxa_port *p; 838 unsigned int i; 839 int ret; 840 841 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports), 842 GFP_KERNEL); 843 if (brd->ports == NULL) { 844 printk(KERN_ERR "cannot allocate memory for ports\n"); 845 ret = -ENOMEM; 846 goto err; 847 } 848 849 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) { 850 tty_port_init(&p->port); 851 p->port.ops = &moxa_port_ops; 852 p->type = PORT_16550A; 853 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; 854 } 855 856 switch (brd->boardType) { 857 case MOXA_BOARD_C218_ISA: 858 case MOXA_BOARD_C218_PCI: 859 file = "c218tunx.cod"; 860 break; 861 case MOXA_BOARD_CP204J: 862 file = "cp204unx.cod"; 863 break; 864 default: 865 file = "c320tunx.cod"; 866 break; 867 } 868 869 ret = request_firmware(&fw, file, dev); 870 if (ret) { 871 printk(KERN_ERR "MOXA: request_firmware failed. Make sure " 872 "you've placed '%s' file into your firmware " 873 "loader directory (e.g. /lib/firmware)\n", 874 file); 875 goto err_free; 876 } 877 878 ret = moxa_load_fw(brd, fw); 879 880 release_firmware(fw); 881 882 if (ret) 883 goto err_free; 884 885 spin_lock_bh(&moxa_lock); 886 brd->ready = 1; 887 if (!timer_pending(&moxaTimer)) 888 mod_timer(&moxaTimer, jiffies + HZ / 50); 889 spin_unlock_bh(&moxa_lock); 890 891 return 0; 892 err_free: 893 kfree(brd->ports); 894 err: 895 return ret; 896 } 897 898 static void moxa_board_deinit(struct moxa_board_conf *brd) 899 { 900 unsigned int a, opened; 901 902 mutex_lock(&moxa_openlock); 903 spin_lock_bh(&moxa_lock); 904 brd->ready = 0; 905 spin_unlock_bh(&moxa_lock); 906 907 /* pci hot-un-plug support */ 908 for (a = 0; a < brd->numPorts; a++) 909 if (brd->ports[a].port.flags & ASYNC_INITIALIZED) { 910 struct tty_struct *tty = tty_port_tty_get( 911 &brd->ports[a].port); 912 if (tty) { 913 tty_hangup(tty); 914 tty_kref_put(tty); 915 } 916 } 917 while (1) { 918 opened = 0; 919 for (a = 0; a < brd->numPorts; a++) 920 if (brd->ports[a].port.flags & ASYNC_INITIALIZED) 921 opened++; 922 mutex_unlock(&moxa_openlock); 923 if (!opened) 924 break; 925 msleep(50); 926 mutex_lock(&moxa_openlock); 927 } 928 929 iounmap(brd->basemem); 930 brd->basemem = NULL; 931 kfree(brd->ports); 932 } 933 934 #ifdef CONFIG_PCI 935 static int __devinit moxa_pci_probe(struct pci_dev *pdev, 936 const struct pci_device_id *ent) 937 { 938 struct moxa_board_conf *board; 939 unsigned int i; 940 int board_type = ent->driver_data; 941 int retval; 942 943 retval = pci_enable_device(pdev); 944 if (retval) { 945 dev_err(&pdev->dev, "can't enable pci device\n"); 946 goto err; 947 } 948 949 for (i = 0; i < MAX_BOARDS; i++) 950 if (moxa_boards[i].basemem == NULL) 951 break; 952 953 retval = -ENODEV; 954 if (i >= MAX_BOARDS) { 955 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards " 956 "found. Board is ignored.\n", MAX_BOARDS); 957 goto err; 958 } 959 960 board = &moxa_boards[i]; 961 962 retval = pci_request_region(pdev, 2, "moxa-base"); 963 if (retval) { 964 dev_err(&pdev->dev, "can't request pci region 2\n"); 965 goto err; 966 } 967 968 board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000); 969 if (board->basemem == NULL) { 970 dev_err(&pdev->dev, "can't remap io space 2\n"); 971 goto err_reg; 972 } 973 974 board->boardType = board_type; 975 switch (board_type) { 976 case MOXA_BOARD_C218_ISA: 977 case MOXA_BOARD_C218_PCI: 978 board->numPorts = 8; 979 break; 980 981 case MOXA_BOARD_CP204J: 982 board->numPorts = 4; 983 break; 984 default: 985 board->numPorts = 0; 986 break; 987 } 988 board->busType = MOXA_BUS_TYPE_PCI; 989 990 retval = moxa_init_board(board, &pdev->dev); 991 if (retval) 992 goto err_base; 993 994 pci_set_drvdata(pdev, board); 995 996 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n", 997 moxa_brdname[board_type - 1], board->numPorts); 998 999 return 0; 1000 err_base: 1001 iounmap(board->basemem); 1002 board->basemem = NULL; 1003 err_reg: 1004 pci_release_region(pdev, 2); 1005 err: 1006 return retval; 1007 } 1008 1009 static void __devexit moxa_pci_remove(struct pci_dev *pdev) 1010 { 1011 struct moxa_board_conf *brd = pci_get_drvdata(pdev); 1012 1013 moxa_board_deinit(brd); 1014 1015 pci_release_region(pdev, 2); 1016 } 1017 1018 static struct pci_driver moxa_pci_driver = { 1019 .name = "moxa", 1020 .id_table = moxa_pcibrds, 1021 .probe = moxa_pci_probe, 1022 .remove = __devexit_p(moxa_pci_remove) 1023 }; 1024 #endif /* CONFIG_PCI */ 1025 1026 static int __init moxa_init(void) 1027 { 1028 unsigned int isabrds = 0; 1029 int retval = 0; 1030 struct moxa_board_conf *brd = moxa_boards; 1031 unsigned int i; 1032 1033 printk(KERN_INFO "MOXA Intellio family driver version %s\n", 1034 MOXA_VERSION); 1035 moxaDriver = alloc_tty_driver(MAX_PORTS + 1); 1036 if (!moxaDriver) 1037 return -ENOMEM; 1038 1039 moxaDriver->name = "ttyMX"; 1040 moxaDriver->major = ttymajor; 1041 moxaDriver->minor_start = 0; 1042 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL; 1043 moxaDriver->subtype = SERIAL_TYPE_NORMAL; 1044 moxaDriver->init_termios = tty_std_termios; 1045 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; 1046 moxaDriver->init_termios.c_ispeed = 9600; 1047 moxaDriver->init_termios.c_ospeed = 9600; 1048 moxaDriver->flags = TTY_DRIVER_REAL_RAW; 1049 tty_set_operations(moxaDriver, &moxa_ops); 1050 1051 if (tty_register_driver(moxaDriver)) { 1052 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n"); 1053 put_tty_driver(moxaDriver); 1054 return -1; 1055 } 1056 1057 /* Find the boards defined from module args. */ 1058 1059 for (i = 0; i < MAX_BOARDS; i++) { 1060 if (!baseaddr[i]) 1061 break; 1062 if (type[i] == MOXA_BOARD_C218_ISA || 1063 type[i] == MOXA_BOARD_C320_ISA) { 1064 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n", 1065 isabrds + 1, moxa_brdname[type[i] - 1], 1066 baseaddr[i]); 1067 brd->boardType = type[i]; 1068 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 : 1069 numports[i]; 1070 brd->busType = MOXA_BUS_TYPE_ISA; 1071 brd->basemem = ioremap_nocache(baseaddr[i], 0x4000); 1072 if (!brd->basemem) { 1073 printk(KERN_ERR "MOXA: can't remap %lx\n", 1074 baseaddr[i]); 1075 continue; 1076 } 1077 if (moxa_init_board(brd, NULL)) { 1078 iounmap(brd->basemem); 1079 brd->basemem = NULL; 1080 continue; 1081 } 1082 1083 printk(KERN_INFO "MOXA isa board found at 0x%.8lu and " 1084 "ready (%u ports, firmware loaded)\n", 1085 baseaddr[i], brd->numPorts); 1086 1087 brd++; 1088 isabrds++; 1089 } 1090 } 1091 1092 #ifdef CONFIG_PCI 1093 retval = pci_register_driver(&moxa_pci_driver); 1094 if (retval) { 1095 printk(KERN_ERR "Can't register MOXA pci driver!\n"); 1096 if (isabrds) 1097 retval = 0; 1098 } 1099 #endif 1100 1101 return retval; 1102 } 1103 1104 static void __exit moxa_exit(void) 1105 { 1106 unsigned int i; 1107 1108 #ifdef CONFIG_PCI 1109 pci_unregister_driver(&moxa_pci_driver); 1110 #endif 1111 1112 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */ 1113 if (moxa_boards[i].ready) 1114 moxa_board_deinit(&moxa_boards[i]); 1115 1116 del_timer_sync(&moxaTimer); 1117 1118 if (tty_unregister_driver(moxaDriver)) 1119 printk(KERN_ERR "Couldn't unregister MOXA Intellio family " 1120 "serial driver\n"); 1121 put_tty_driver(moxaDriver); 1122 } 1123 1124 module_init(moxa_init); 1125 module_exit(moxa_exit); 1126 1127 static void moxa_shutdown(struct tty_port *port) 1128 { 1129 struct moxa_port *ch = container_of(port, struct moxa_port, port); 1130 MoxaPortDisable(ch); 1131 MoxaPortFlushData(ch, 2); 1132 } 1133 1134 static int moxa_carrier_raised(struct tty_port *port) 1135 { 1136 struct moxa_port *ch = container_of(port, struct moxa_port, port); 1137 int dcd; 1138 1139 spin_lock_irq(&port->lock); 1140 dcd = ch->DCDState; 1141 spin_unlock_irq(&port->lock); 1142 return dcd; 1143 } 1144 1145 static void moxa_dtr_rts(struct tty_port *port, int onoff) 1146 { 1147 struct moxa_port *ch = container_of(port, struct moxa_port, port); 1148 MoxaPortLineCtrl(ch, onoff, onoff); 1149 } 1150 1151 1152 static int moxa_open(struct tty_struct *tty, struct file *filp) 1153 { 1154 struct moxa_board_conf *brd; 1155 struct moxa_port *ch; 1156 int port; 1157 1158 port = tty->index; 1159 if (port == MAX_PORTS) { 1160 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM; 1161 } 1162 if (mutex_lock_interruptible(&moxa_openlock)) 1163 return -ERESTARTSYS; 1164 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD]; 1165 if (!brd->ready) { 1166 mutex_unlock(&moxa_openlock); 1167 return -ENODEV; 1168 } 1169 1170 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) { 1171 mutex_unlock(&moxa_openlock); 1172 return -ENODEV; 1173 } 1174 1175 ch = &brd->ports[port % MAX_PORTS_PER_BOARD]; 1176 ch->port.count++; 1177 tty->driver_data = ch; 1178 tty_port_tty_set(&ch->port, tty); 1179 mutex_lock(&ch->port.mutex); 1180 if (!(ch->port.flags & ASYNC_INITIALIZED)) { 1181 ch->statusflags = 0; 1182 moxa_set_tty_param(tty, tty->termios); 1183 MoxaPortLineCtrl(ch, 1, 1); 1184 MoxaPortEnable(ch); 1185 MoxaSetFifo(ch, ch->type == PORT_16550A); 1186 ch->port.flags |= ASYNC_INITIALIZED; 1187 } 1188 mutex_unlock(&ch->port.mutex); 1189 mutex_unlock(&moxa_openlock); 1190 1191 return tty_port_block_til_ready(&ch->port, tty, filp); 1192 } 1193 1194 static void moxa_close(struct tty_struct *tty, struct file *filp) 1195 { 1196 struct moxa_port *ch = tty->driver_data; 1197 ch->cflag = tty->termios->c_cflag; 1198 tty_port_close(&ch->port, tty, filp); 1199 } 1200 1201 static int moxa_write(struct tty_struct *tty, 1202 const unsigned char *buf, int count) 1203 { 1204 struct moxa_port *ch = tty->driver_data; 1205 unsigned long flags; 1206 int len; 1207 1208 if (ch == NULL) 1209 return 0; 1210 1211 spin_lock_irqsave(&moxa_lock, flags); 1212 len = MoxaPortWriteData(tty, buf, count); 1213 spin_unlock_irqrestore(&moxa_lock, flags); 1214 1215 set_bit(LOWWAIT, &ch->statusflags); 1216 return len; 1217 } 1218 1219 static int moxa_write_room(struct tty_struct *tty) 1220 { 1221 struct moxa_port *ch; 1222 1223 if (tty->stopped) 1224 return 0; 1225 ch = tty->driver_data; 1226 if (ch == NULL) 1227 return 0; 1228 return MoxaPortTxFree(ch); 1229 } 1230 1231 static void moxa_flush_buffer(struct tty_struct *tty) 1232 { 1233 struct moxa_port *ch = tty->driver_data; 1234 1235 if (ch == NULL) 1236 return; 1237 MoxaPortFlushData(ch, 1); 1238 tty_wakeup(tty); 1239 } 1240 1241 static int moxa_chars_in_buffer(struct tty_struct *tty) 1242 { 1243 struct moxa_port *ch = tty->driver_data; 1244 int chars; 1245 1246 chars = MoxaPortTxQueue(ch); 1247 if (chars) 1248 /* 1249 * Make it possible to wakeup anything waiting for output 1250 * in tty_ioctl.c, etc. 1251 */ 1252 set_bit(EMPTYWAIT, &ch->statusflags); 1253 return chars; 1254 } 1255 1256 static int moxa_tiocmget(struct tty_struct *tty) 1257 { 1258 struct moxa_port *ch = tty->driver_data; 1259 int flag = 0, dtr, rts; 1260 1261 MoxaPortGetLineOut(ch, &dtr, &rts); 1262 if (dtr) 1263 flag |= TIOCM_DTR; 1264 if (rts) 1265 flag |= TIOCM_RTS; 1266 dtr = MoxaPortLineStatus(ch); 1267 if (dtr & 1) 1268 flag |= TIOCM_CTS; 1269 if (dtr & 2) 1270 flag |= TIOCM_DSR; 1271 if (dtr & 4) 1272 flag |= TIOCM_CD; 1273 return flag; 1274 } 1275 1276 static int moxa_tiocmset(struct tty_struct *tty, 1277 unsigned int set, unsigned int clear) 1278 { 1279 struct moxa_port *ch; 1280 int dtr, rts; 1281 1282 mutex_lock(&moxa_openlock); 1283 ch = tty->driver_data; 1284 if (!ch) { 1285 mutex_unlock(&moxa_openlock); 1286 return -EINVAL; 1287 } 1288 1289 MoxaPortGetLineOut(ch, &dtr, &rts); 1290 if (set & TIOCM_RTS) 1291 rts = 1; 1292 if (set & TIOCM_DTR) 1293 dtr = 1; 1294 if (clear & TIOCM_RTS) 1295 rts = 0; 1296 if (clear & TIOCM_DTR) 1297 dtr = 0; 1298 MoxaPortLineCtrl(ch, dtr, rts); 1299 mutex_unlock(&moxa_openlock); 1300 return 0; 1301 } 1302 1303 static void moxa_set_termios(struct tty_struct *tty, 1304 struct ktermios *old_termios) 1305 { 1306 struct moxa_port *ch = tty->driver_data; 1307 1308 if (ch == NULL) 1309 return; 1310 moxa_set_tty_param(tty, old_termios); 1311 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty)) 1312 wake_up_interruptible(&ch->port.open_wait); 1313 } 1314 1315 static void moxa_stop(struct tty_struct *tty) 1316 { 1317 struct moxa_port *ch = tty->driver_data; 1318 1319 if (ch == NULL) 1320 return; 1321 MoxaPortTxDisable(ch); 1322 set_bit(TXSTOPPED, &ch->statusflags); 1323 } 1324 1325 1326 static void moxa_start(struct tty_struct *tty) 1327 { 1328 struct moxa_port *ch = tty->driver_data; 1329 1330 if (ch == NULL) 1331 return; 1332 1333 if (!test_bit(TXSTOPPED, &ch->statusflags)) 1334 return; 1335 1336 MoxaPortTxEnable(ch); 1337 clear_bit(TXSTOPPED, &ch->statusflags); 1338 } 1339 1340 static void moxa_hangup(struct tty_struct *tty) 1341 { 1342 struct moxa_port *ch = tty->driver_data; 1343 tty_port_hangup(&ch->port); 1344 } 1345 1346 static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd) 1347 { 1348 struct tty_struct *tty; 1349 unsigned long flags; 1350 dcd = !!dcd; 1351 1352 spin_lock_irqsave(&p->port.lock, flags); 1353 if (dcd != p->DCDState) { 1354 p->DCDState = dcd; 1355 spin_unlock_irqrestore(&p->port.lock, flags); 1356 tty = tty_port_tty_get(&p->port); 1357 if (tty && C_CLOCAL(tty) && !dcd) 1358 tty_hangup(tty); 1359 tty_kref_put(tty); 1360 } 1361 else 1362 spin_unlock_irqrestore(&p->port.lock, flags); 1363 } 1364 1365 static int moxa_poll_port(struct moxa_port *p, unsigned int handle, 1366 u16 __iomem *ip) 1367 { 1368 struct tty_struct *tty = tty_port_tty_get(&p->port); 1369 void __iomem *ofsAddr; 1370 unsigned int inited = p->port.flags & ASYNC_INITIALIZED; 1371 u16 intr; 1372 1373 if (tty) { 1374 if (test_bit(EMPTYWAIT, &p->statusflags) && 1375 MoxaPortTxQueue(p) == 0) { 1376 clear_bit(EMPTYWAIT, &p->statusflags); 1377 tty_wakeup(tty); 1378 } 1379 if (test_bit(LOWWAIT, &p->statusflags) && !tty->stopped && 1380 MoxaPortTxQueue(p) <= WAKEUP_CHARS) { 1381 clear_bit(LOWWAIT, &p->statusflags); 1382 tty_wakeup(tty); 1383 } 1384 1385 if (inited && !test_bit(TTY_THROTTLED, &tty->flags) && 1386 MoxaPortRxQueue(p) > 0) { /* RX */ 1387 MoxaPortReadData(p); 1388 tty_schedule_flip(tty); 1389 } 1390 } else { 1391 clear_bit(EMPTYWAIT, &p->statusflags); 1392 MoxaPortFlushData(p, 0); /* flush RX */ 1393 } 1394 1395 if (!handle) /* nothing else to do */ 1396 goto put; 1397 1398 intr = readw(ip); /* port irq status */ 1399 if (intr == 0) 1400 goto put; 1401 1402 writew(0, ip); /* ACK port */ 1403 ofsAddr = p->tableAddr; 1404 if (intr & IntrTx) /* disable tx intr */ 1405 writew(readw(ofsAddr + HostStat) & ~WakeupTx, 1406 ofsAddr + HostStat); 1407 1408 if (!inited) 1409 goto put; 1410 1411 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */ 1412 tty_insert_flip_char(tty, 0, TTY_BREAK); 1413 tty_schedule_flip(tty); 1414 } 1415 1416 if (intr & IntrLine) 1417 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state); 1418 put: 1419 tty_kref_put(tty); 1420 1421 return 0; 1422 } 1423 1424 static void moxa_poll(unsigned long ignored) 1425 { 1426 struct moxa_board_conf *brd; 1427 u16 __iomem *ip; 1428 unsigned int card, port, served = 0; 1429 1430 spin_lock(&moxa_lock); 1431 for (card = 0; card < MAX_BOARDS; card++) { 1432 brd = &moxa_boards[card]; 1433 if (!brd->ready) 1434 continue; 1435 1436 served++; 1437 1438 ip = NULL; 1439 if (readb(brd->intPend) == 0xff) 1440 ip = brd->intTable + readb(brd->intNdx); 1441 1442 for (port = 0; port < brd->numPorts; port++) 1443 moxa_poll_port(&brd->ports[port], !!ip, ip + port); 1444 1445 if (ip) 1446 writeb(0, brd->intPend); /* ACK */ 1447 1448 if (moxaLowWaterChk) { 1449 struct moxa_port *p = brd->ports; 1450 for (port = 0; port < brd->numPorts; port++, p++) 1451 if (p->lowChkFlag) { 1452 p->lowChkFlag = 0; 1453 moxa_low_water_check(p->tableAddr); 1454 } 1455 } 1456 } 1457 moxaLowWaterChk = 0; 1458 1459 if (served) 1460 mod_timer(&moxaTimer, jiffies + HZ / 50); 1461 spin_unlock(&moxa_lock); 1462 } 1463 1464 /******************************************************************************/ 1465 1466 static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios) 1467 { 1468 register struct ktermios *ts = tty->termios; 1469 struct moxa_port *ch = tty->driver_data; 1470 int rts, cts, txflow, rxflow, xany, baud; 1471 1472 rts = cts = txflow = rxflow = xany = 0; 1473 if (ts->c_cflag & CRTSCTS) 1474 rts = cts = 1; 1475 if (ts->c_iflag & IXON) 1476 txflow = 1; 1477 if (ts->c_iflag & IXOFF) 1478 rxflow = 1; 1479 if (ts->c_iflag & IXANY) 1480 xany = 1; 1481 1482 /* Clear the features we don't support */ 1483 ts->c_cflag &= ~CMSPAR; 1484 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany); 1485 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty)); 1486 if (baud == -1) 1487 baud = tty_termios_baud_rate(old_termios); 1488 /* Not put the baud rate into the termios data */ 1489 tty_encode_baud_rate(tty, baud, baud); 1490 } 1491 1492 /***************************************************************************** 1493 * Driver level functions: * 1494 *****************************************************************************/ 1495 1496 static void MoxaPortFlushData(struct moxa_port *port, int mode) 1497 { 1498 void __iomem *ofsAddr; 1499 if (mode < 0 || mode > 2) 1500 return; 1501 ofsAddr = port->tableAddr; 1502 moxafunc(ofsAddr, FC_FlushQueue, mode); 1503 if (mode != 1) { 1504 port->lowChkFlag = 0; 1505 moxa_low_water_check(ofsAddr); 1506 } 1507 } 1508 1509 /* 1510 * Moxa Port Number Description: 1511 * 1512 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And, 1513 * the port number using in MOXA driver functions will be 0 to 31 for 1514 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96 1515 * to 127 for fourth. For example, if you setup three MOXA boards, 1516 * first board is C218, second board is C320-16 and third board is 1517 * C320-32. The port number of first board (C218 - 8 ports) is from 1518 * 0 to 7. The port number of second board (C320 - 16 ports) is form 1519 * 32 to 47. The port number of third board (C320 - 32 ports) is from 1520 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to 1521 * 127 will be invalid. 1522 * 1523 * 1524 * Moxa Functions Description: 1525 * 1526 * Function 1: Driver initialization routine, this routine must be 1527 * called when initialized driver. 1528 * Syntax: 1529 * void MoxaDriverInit(); 1530 * 1531 * 1532 * Function 2: Moxa driver private IOCTL command processing. 1533 * Syntax: 1534 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port); 1535 * 1536 * unsigned int cmd : IOCTL command 1537 * unsigned long arg : IOCTL argument 1538 * int port : port number (0 - 127) 1539 * 1540 * return: 0 (OK) 1541 * -EINVAL 1542 * -ENOIOCTLCMD 1543 * 1544 * 1545 * Function 6: Enable this port to start Tx/Rx data. 1546 * Syntax: 1547 * void MoxaPortEnable(int port); 1548 * int port : port number (0 - 127) 1549 * 1550 * 1551 * Function 7: Disable this port 1552 * Syntax: 1553 * void MoxaPortDisable(int port); 1554 * int port : port number (0 - 127) 1555 * 1556 * 1557 * Function 10: Setting baud rate of this port. 1558 * Syntax: 1559 * speed_t MoxaPortSetBaud(int port, speed_t baud); 1560 * int port : port number (0 - 127) 1561 * long baud : baud rate (50 - 115200) 1562 * 1563 * return: 0 : this port is invalid or baud < 50 1564 * 50 - 115200 : the real baud rate set to the port, if 1565 * the argument baud is large than maximun 1566 * available baud rate, the real setting 1567 * baud rate will be the maximun baud rate. 1568 * 1569 * 1570 * Function 12: Configure the port. 1571 * Syntax: 1572 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud); 1573 * int port : port number (0 - 127) 1574 * struct ktermios * termio : termio structure pointer 1575 * speed_t baud : baud rate 1576 * 1577 * return: -1 : this port is invalid or termio == NULL 1578 * 0 : setting O.K. 1579 * 1580 * 1581 * Function 13: Get the DTR/RTS state of this port. 1582 * Syntax: 1583 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); 1584 * int port : port number (0 - 127) 1585 * int * dtrState : pointer to INT to receive the current DTR 1586 * state. (if NULL, this function will not 1587 * write to this address) 1588 * int * rtsState : pointer to INT to receive the current RTS 1589 * state. (if NULL, this function will not 1590 * write to this address) 1591 * 1592 * return: -1 : this port is invalid 1593 * 0 : O.K. 1594 * 1595 * 1596 * Function 14: Setting the DTR/RTS output state of this port. 1597 * Syntax: 1598 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState); 1599 * int port : port number (0 - 127) 1600 * int dtrState : DTR output state (0: off, 1: on) 1601 * int rtsState : RTS output state (0: off, 1: on) 1602 * 1603 * 1604 * Function 15: Setting the flow control of this port. 1605 * Syntax: 1606 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow, 1607 * int txFlow,int xany); 1608 * int port : port number (0 - 127) 1609 * int rtsFlow : H/W RTS flow control (0: no, 1: yes) 1610 * int ctsFlow : H/W CTS flow control (0: no, 1: yes) 1611 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes) 1612 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes) 1613 * int xany : S/W XANY flow control (0: no, 1: yes) 1614 * 1615 * 1616 * Function 16: Get ths line status of this port 1617 * Syntax: 1618 * int MoxaPortLineStatus(int port); 1619 * int port : port number (0 - 127) 1620 * 1621 * return: Bit 0 - CTS state (0: off, 1: on) 1622 * Bit 1 - DSR state (0: off, 1: on) 1623 * Bit 2 - DCD state (0: off, 1: on) 1624 * 1625 * 1626 * Function 19: Flush the Rx/Tx buffer data of this port. 1627 * Syntax: 1628 * void MoxaPortFlushData(int port, int mode); 1629 * int port : port number (0 - 127) 1630 * int mode 1631 * 0 : flush the Rx buffer 1632 * 1 : flush the Tx buffer 1633 * 2 : flush the Rx and Tx buffer 1634 * 1635 * 1636 * Function 20: Write data. 1637 * Syntax: 1638 * int MoxaPortWriteData(int port, unsigned char * buffer, int length); 1639 * int port : port number (0 - 127) 1640 * unsigned char * buffer : pointer to write data buffer. 1641 * int length : write data length 1642 * 1643 * return: 0 - length : real write data length 1644 * 1645 * 1646 * Function 21: Read data. 1647 * Syntax: 1648 * int MoxaPortReadData(int port, struct tty_struct *tty); 1649 * int port : port number (0 - 127) 1650 * struct tty_struct *tty : tty for data 1651 * 1652 * return: 0 - length : real read data length 1653 * 1654 * 1655 * Function 24: Get the Tx buffer current queued data bytes 1656 * Syntax: 1657 * int MoxaPortTxQueue(int port); 1658 * int port : port number (0 - 127) 1659 * 1660 * return: .. : Tx buffer current queued data bytes 1661 * 1662 * 1663 * Function 25: Get the Tx buffer current free space 1664 * Syntax: 1665 * int MoxaPortTxFree(int port); 1666 * int port : port number (0 - 127) 1667 * 1668 * return: .. : Tx buffer current free space 1669 * 1670 * 1671 * Function 26: Get the Rx buffer current queued data bytes 1672 * Syntax: 1673 * int MoxaPortRxQueue(int port); 1674 * int port : port number (0 - 127) 1675 * 1676 * return: .. : Rx buffer current queued data bytes 1677 * 1678 * 1679 * Function 28: Disable port data transmission. 1680 * Syntax: 1681 * void MoxaPortTxDisable(int port); 1682 * int port : port number (0 - 127) 1683 * 1684 * 1685 * Function 29: Enable port data transmission. 1686 * Syntax: 1687 * void MoxaPortTxEnable(int port); 1688 * int port : port number (0 - 127) 1689 * 1690 * 1691 * Function 31: Get the received BREAK signal count and reset it. 1692 * Syntax: 1693 * int MoxaPortResetBrkCnt(int port); 1694 * int port : port number (0 - 127) 1695 * 1696 * return: 0 - .. : BREAK signal count 1697 * 1698 * 1699 */ 1700 1701 static void MoxaPortEnable(struct moxa_port *port) 1702 { 1703 void __iomem *ofsAddr; 1704 u16 lowwater = 512; 1705 1706 ofsAddr = port->tableAddr; 1707 writew(lowwater, ofsAddr + Low_water); 1708 if (MOXA_IS_320(port->board)) 1709 moxafunc(ofsAddr, FC_SetBreakIrq, 0); 1710 else 1711 writew(readw(ofsAddr + HostStat) | WakeupBreak, 1712 ofsAddr + HostStat); 1713 1714 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code); 1715 moxafunc(ofsAddr, FC_FlushQueue, 2); 1716 1717 moxafunc(ofsAddr, FC_EnableCH, Magic_code); 1718 MoxaPortLineStatus(port); 1719 } 1720 1721 static void MoxaPortDisable(struct moxa_port *port) 1722 { 1723 void __iomem *ofsAddr = port->tableAddr; 1724 1725 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */ 1726 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code); 1727 writew(0, ofsAddr + HostStat); 1728 moxafunc(ofsAddr, FC_DisableCH, Magic_code); 1729 } 1730 1731 static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud) 1732 { 1733 void __iomem *ofsAddr = port->tableAddr; 1734 unsigned int clock, val; 1735 speed_t max; 1736 1737 max = MOXA_IS_320(port->board) ? 460800 : 921600; 1738 if (baud < 50) 1739 return 0; 1740 if (baud > max) 1741 baud = max; 1742 clock = 921600; 1743 val = clock / baud; 1744 moxafunc(ofsAddr, FC_SetBaud, val); 1745 baud = clock / val; 1746 return baud; 1747 } 1748 1749 static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio, 1750 speed_t baud) 1751 { 1752 void __iomem *ofsAddr; 1753 tcflag_t mode = 0; 1754 1755 ofsAddr = port->tableAddr; 1756 1757 mode = termio->c_cflag & CSIZE; 1758 if (mode == CS5) 1759 mode = MX_CS5; 1760 else if (mode == CS6) 1761 mode = MX_CS6; 1762 else if (mode == CS7) 1763 mode = MX_CS7; 1764 else if (mode == CS8) 1765 mode = MX_CS8; 1766 1767 if (termio->c_cflag & CSTOPB) { 1768 if (mode == MX_CS5) 1769 mode |= MX_STOP15; 1770 else 1771 mode |= MX_STOP2; 1772 } else 1773 mode |= MX_STOP1; 1774 1775 if (termio->c_cflag & PARENB) { 1776 if (termio->c_cflag & PARODD) 1777 mode |= MX_PARODD; 1778 else 1779 mode |= MX_PAREVEN; 1780 } else 1781 mode |= MX_PARNONE; 1782 1783 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode); 1784 1785 if (MOXA_IS_320(port->board) && baud >= 921600) 1786 return -1; 1787 1788 baud = MoxaPortSetBaud(port, baud); 1789 1790 if (termio->c_iflag & (IXON | IXOFF | IXANY)) { 1791 spin_lock_irq(&moxafunc_lock); 1792 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg); 1793 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1); 1794 writeb(FC_SetXonXoff, ofsAddr + FuncCode); 1795 moxa_wait_finish(ofsAddr); 1796 spin_unlock_irq(&moxafunc_lock); 1797 1798 } 1799 return baud; 1800 } 1801 1802 static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState, 1803 int *rtsState) 1804 { 1805 if (dtrState) 1806 *dtrState = !!(port->lineCtrl & DTR_ON); 1807 if (rtsState) 1808 *rtsState = !!(port->lineCtrl & RTS_ON); 1809 1810 return 0; 1811 } 1812 1813 static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts) 1814 { 1815 u8 mode = 0; 1816 1817 if (dtr) 1818 mode |= DTR_ON; 1819 if (rts) 1820 mode |= RTS_ON; 1821 port->lineCtrl = mode; 1822 moxafunc(port->tableAddr, FC_LineControl, mode); 1823 } 1824 1825 static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts, 1826 int txflow, int rxflow, int txany) 1827 { 1828 int mode = 0; 1829 1830 if (rts) 1831 mode |= RTS_FlowCtl; 1832 if (cts) 1833 mode |= CTS_FlowCtl; 1834 if (txflow) 1835 mode |= Tx_FlowCtl; 1836 if (rxflow) 1837 mode |= Rx_FlowCtl; 1838 if (txany) 1839 mode |= IXM_IXANY; 1840 moxafunc(port->tableAddr, FC_SetFlowCtl, mode); 1841 } 1842 1843 static int MoxaPortLineStatus(struct moxa_port *port) 1844 { 1845 void __iomem *ofsAddr; 1846 int val; 1847 1848 ofsAddr = port->tableAddr; 1849 if (MOXA_IS_320(port->board)) 1850 val = moxafuncret(ofsAddr, FC_LineStatus, 0); 1851 else 1852 val = readw(ofsAddr + FlagStat) >> 4; 1853 val &= 0x0B; 1854 if (val & 8) 1855 val |= 4; 1856 moxa_new_dcdstate(port, val & 8); 1857 val &= 7; 1858 return val; 1859 } 1860 1861 static int MoxaPortWriteData(struct tty_struct *tty, 1862 const unsigned char *buffer, int len) 1863 { 1864 struct moxa_port *port = tty->driver_data; 1865 void __iomem *baseAddr, *ofsAddr, *ofs; 1866 unsigned int c, total; 1867 u16 head, tail, tx_mask, spage, epage; 1868 u16 pageno, pageofs, bufhead; 1869 1870 ofsAddr = port->tableAddr; 1871 baseAddr = port->board->basemem; 1872 tx_mask = readw(ofsAddr + TX_mask); 1873 spage = readw(ofsAddr + Page_txb); 1874 epage = readw(ofsAddr + EndPage_txb); 1875 tail = readw(ofsAddr + TXwptr); 1876 head = readw(ofsAddr + TXrptr); 1877 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask); 1878 if (c > len) 1879 c = len; 1880 moxaLog.txcnt[port->port.tty->index] += c; 1881 total = c; 1882 if (spage == epage) { 1883 bufhead = readw(ofsAddr + Ofs_txb); 1884 writew(spage, baseAddr + Control_reg); 1885 while (c > 0) { 1886 if (head > tail) 1887 len = head - tail - 1; 1888 else 1889 len = tx_mask + 1 - tail; 1890 len = (c > len) ? len : c; 1891 ofs = baseAddr + DynPage_addr + bufhead + tail; 1892 memcpy_toio(ofs, buffer, len); 1893 buffer += len; 1894 tail = (tail + len) & tx_mask; 1895 c -= len; 1896 } 1897 } else { 1898 pageno = spage + (tail >> 13); 1899 pageofs = tail & Page_mask; 1900 while (c > 0) { 1901 len = Page_size - pageofs; 1902 if (len > c) 1903 len = c; 1904 writeb(pageno, baseAddr + Control_reg); 1905 ofs = baseAddr + DynPage_addr + pageofs; 1906 memcpy_toio(ofs, buffer, len); 1907 buffer += len; 1908 if (++pageno == epage) 1909 pageno = spage; 1910 pageofs = 0; 1911 c -= len; 1912 } 1913 tail = (tail + total) & tx_mask; 1914 } 1915 writew(tail, ofsAddr + TXwptr); 1916 writeb(1, ofsAddr + CD180TXirq); /* start to send */ 1917 return total; 1918 } 1919 1920 static int MoxaPortReadData(struct moxa_port *port) 1921 { 1922 struct tty_struct *tty = port->port.tty; 1923 unsigned char *dst; 1924 void __iomem *baseAddr, *ofsAddr, *ofs; 1925 unsigned int count, len, total; 1926 u16 tail, rx_mask, spage, epage; 1927 u16 pageno, pageofs, bufhead, head; 1928 1929 ofsAddr = port->tableAddr; 1930 baseAddr = port->board->basemem; 1931 head = readw(ofsAddr + RXrptr); 1932 tail = readw(ofsAddr + RXwptr); 1933 rx_mask = readw(ofsAddr + RX_mask); 1934 spage = readw(ofsAddr + Page_rxb); 1935 epage = readw(ofsAddr + EndPage_rxb); 1936 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1); 1937 if (count == 0) 1938 return 0; 1939 1940 total = count; 1941 moxaLog.rxcnt[tty->index] += total; 1942 if (spage == epage) { 1943 bufhead = readw(ofsAddr + Ofs_rxb); 1944 writew(spage, baseAddr + Control_reg); 1945 while (count > 0) { 1946 ofs = baseAddr + DynPage_addr + bufhead + head; 1947 len = (tail >= head) ? (tail - head) : 1948 (rx_mask + 1 - head); 1949 len = tty_prepare_flip_string(tty, &dst, 1950 min(len, count)); 1951 memcpy_fromio(dst, ofs, len); 1952 head = (head + len) & rx_mask; 1953 count -= len; 1954 } 1955 } else { 1956 pageno = spage + (head >> 13); 1957 pageofs = head & Page_mask; 1958 while (count > 0) { 1959 writew(pageno, baseAddr + Control_reg); 1960 ofs = baseAddr + DynPage_addr + pageofs; 1961 len = tty_prepare_flip_string(tty, &dst, 1962 min(Page_size - pageofs, count)); 1963 memcpy_fromio(dst, ofs, len); 1964 1965 count -= len; 1966 pageofs = (pageofs + len) & Page_mask; 1967 if (pageofs == 0 && ++pageno == epage) 1968 pageno = spage; 1969 } 1970 head = (head + total) & rx_mask; 1971 } 1972 writew(head, ofsAddr + RXrptr); 1973 if (readb(ofsAddr + FlagStat) & Xoff_state) { 1974 moxaLowWaterChk = 1; 1975 port->lowChkFlag = 1; 1976 } 1977 return total; 1978 } 1979 1980 1981 static int MoxaPortTxQueue(struct moxa_port *port) 1982 { 1983 void __iomem *ofsAddr = port->tableAddr; 1984 u16 rptr, wptr, mask; 1985 1986 rptr = readw(ofsAddr + TXrptr); 1987 wptr = readw(ofsAddr + TXwptr); 1988 mask = readw(ofsAddr + TX_mask); 1989 return (wptr - rptr) & mask; 1990 } 1991 1992 static int MoxaPortTxFree(struct moxa_port *port) 1993 { 1994 void __iomem *ofsAddr = port->tableAddr; 1995 u16 rptr, wptr, mask; 1996 1997 rptr = readw(ofsAddr + TXrptr); 1998 wptr = readw(ofsAddr + TXwptr); 1999 mask = readw(ofsAddr + TX_mask); 2000 return mask - ((wptr - rptr) & mask); 2001 } 2002 2003 static int MoxaPortRxQueue(struct moxa_port *port) 2004 { 2005 void __iomem *ofsAddr = port->tableAddr; 2006 u16 rptr, wptr, mask; 2007 2008 rptr = readw(ofsAddr + RXrptr); 2009 wptr = readw(ofsAddr + RXwptr); 2010 mask = readw(ofsAddr + RX_mask); 2011 return (wptr - rptr) & mask; 2012 } 2013 2014 static void MoxaPortTxDisable(struct moxa_port *port) 2015 { 2016 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code); 2017 } 2018 2019 static void MoxaPortTxEnable(struct moxa_port *port) 2020 { 2021 moxafunc(port->tableAddr, FC_SetXonState, Magic_code); 2022 } 2023 2024 static int moxa_get_serial_info(struct moxa_port *info, 2025 struct serial_struct __user *retinfo) 2026 { 2027 struct serial_struct tmp = { 2028 .type = info->type, 2029 .line = info->port.tty->index, 2030 .flags = info->port.flags, 2031 .baud_base = 921600, 2032 .close_delay = info->port.close_delay 2033 }; 2034 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0; 2035 } 2036 2037 2038 static int moxa_set_serial_info(struct moxa_port *info, 2039 struct serial_struct __user *new_info) 2040 { 2041 struct serial_struct new_serial; 2042 2043 if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) 2044 return -EFAULT; 2045 2046 if (new_serial.irq != 0 || new_serial.port != 0 || 2047 new_serial.custom_divisor != 0 || 2048 new_serial.baud_base != 921600) 2049 return -EPERM; 2050 2051 if (!capable(CAP_SYS_ADMIN)) { 2052 if (((new_serial.flags & ~ASYNC_USR_MASK) != 2053 (info->port.flags & ~ASYNC_USR_MASK))) 2054 return -EPERM; 2055 } else 2056 info->port.close_delay = new_serial.close_delay * HZ / 100; 2057 2058 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS); 2059 new_serial.flags |= (info->port.flags & ASYNC_FLAGS); 2060 2061 MoxaSetFifo(info, new_serial.type == PORT_16550A); 2062 2063 info->type = new_serial.type; 2064 return 0; 2065 } 2066 2067 2068 2069 /***************************************************************************** 2070 * Static local functions: * 2071 *****************************************************************************/ 2072 2073 static void MoxaSetFifo(struct moxa_port *port, int enable) 2074 { 2075 void __iomem *ofsAddr = port->tableAddr; 2076 2077 if (!enable) { 2078 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0); 2079 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1); 2080 } else { 2081 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3); 2082 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16); 2083 } 2084 } 2085