moxa.c revision f710ebd7f70801e31751f2c49fe4b92a477d24eb
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 47#include <asm/system.h> 48#include <asm/io.h> 49#include <asm/uaccess.h> 50 51#include "moxa.h" 52 53#define MOXA_VERSION "6.0k" 54 55#define MOXA_FW_HDRLEN 32 56 57#define MOXAMAJOR 172 58 59#define MAX_BOARDS 4 /* Don't change this value */ 60#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */ 61#define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD) 62 63#define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \ 64 (brd)->boardType == MOXA_BOARD_C320_PCI) 65 66/* 67 * Define the Moxa PCI vendor and device IDs. 68 */ 69#define MOXA_BUS_TYPE_ISA 0 70#define MOXA_BUS_TYPE_PCI 1 71 72enum { 73 MOXA_BOARD_C218_PCI = 1, 74 MOXA_BOARD_C218_ISA, 75 MOXA_BOARD_C320_PCI, 76 MOXA_BOARD_C320_ISA, 77 MOXA_BOARD_CP204J, 78}; 79 80static char *moxa_brdname[] = 81{ 82 "C218 Turbo PCI series", 83 "C218 Turbo ISA series", 84 "C320 Turbo PCI series", 85 "C320 Turbo ISA series", 86 "CP-204J series", 87}; 88 89#ifdef CONFIG_PCI 90static struct pci_device_id moxa_pcibrds[] = { 91 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218), 92 .driver_data = MOXA_BOARD_C218_PCI }, 93 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320), 94 .driver_data = MOXA_BOARD_C320_PCI }, 95 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J), 96 .driver_data = MOXA_BOARD_CP204J }, 97 { 0 } 98}; 99MODULE_DEVICE_TABLE(pci, moxa_pcibrds); 100#endif /* CONFIG_PCI */ 101 102struct moxa_port; 103 104static struct moxa_board_conf { 105 int boardType; 106 int numPorts; 107 int busType; 108 109 unsigned int ready; 110 111 struct moxa_port *ports; 112 113 void __iomem *basemem; 114 void __iomem *intNdx; 115 void __iomem *intPend; 116 void __iomem *intTable; 117} moxa_boards[MAX_BOARDS]; 118 119struct mxser_mstatus { 120 tcflag_t cflag; 121 int cts; 122 int dsr; 123 int ri; 124 int dcd; 125}; 126 127struct moxaq_str { 128 int inq; 129 int outq; 130}; 131 132struct moxa_port { 133 struct tty_port port; 134 struct moxa_board_conf *board; 135 void __iomem *tableAddr; 136 137 int type; 138 int cflag; 139 unsigned long statusflags; 140 141 u8 DCDState; /* Protected by the port lock */ 142 u8 lineCtrl; 143 u8 lowChkFlag; 144}; 145 146struct mon_str { 147 int tick; 148 int rxcnt[MAX_PORTS]; 149 int txcnt[MAX_PORTS]; 150}; 151 152/* statusflags */ 153#define TXSTOPPED 1 154#define LOWWAIT 2 155#define EMPTYWAIT 3 156 157#define SERIAL_DO_RESTART 158 159#define WAKEUP_CHARS 256 160 161static int ttymajor = MOXAMAJOR; 162static struct mon_str moxaLog; 163static unsigned int moxaFuncTout = HZ / 2; 164static unsigned int moxaLowWaterChk; 165static DEFINE_MUTEX(moxa_openlock); 166/* Variables for insmod */ 167#ifdef MODULE 168static unsigned long baseaddr[MAX_BOARDS]; 169static unsigned int type[MAX_BOARDS]; 170static unsigned int numports[MAX_BOARDS]; 171#endif 172 173MODULE_AUTHOR("William Chen"); 174MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver"); 175MODULE_LICENSE("GPL"); 176#ifdef MODULE 177module_param_array(type, uint, NULL, 0); 178MODULE_PARM_DESC(type, "card type: C218=2, C320=4"); 179module_param_array(baseaddr, ulong, NULL, 0); 180MODULE_PARM_DESC(baseaddr, "base address"); 181module_param_array(numports, uint, NULL, 0); 182MODULE_PARM_DESC(numports, "numports (ignored for C218)"); 183#endif 184module_param(ttymajor, int, 0); 185 186/* 187 * static functions: 188 */ 189static int moxa_open(struct tty_struct *, struct file *); 190static void moxa_close(struct tty_struct *, struct file *); 191static int moxa_write(struct tty_struct *, const unsigned char *, int); 192static int moxa_write_room(struct tty_struct *); 193static void moxa_flush_buffer(struct tty_struct *); 194static int moxa_chars_in_buffer(struct tty_struct *); 195static void moxa_set_termios(struct tty_struct *, struct ktermios *); 196static void moxa_stop(struct tty_struct *); 197static void moxa_start(struct tty_struct *); 198static void moxa_hangup(struct tty_struct *); 199static int moxa_tiocmget(struct tty_struct *tty, struct file *file); 200static int moxa_tiocmset(struct tty_struct *tty, struct file *file, 201 unsigned int set, unsigned int clear); 202static void moxa_poll(unsigned long); 203static void moxa_set_tty_param(struct tty_struct *, struct ktermios *); 204static void moxa_shutdown(struct tty_port *); 205static int moxa_carrier_raised(struct tty_port *); 206static void moxa_dtr_rts(struct tty_port *, int); 207/* 208 * moxa board interface functions: 209 */ 210static void MoxaPortEnable(struct moxa_port *); 211static void MoxaPortDisable(struct moxa_port *); 212static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t); 213static int MoxaPortGetLineOut(struct moxa_port *, int *, int *); 214static void MoxaPortLineCtrl(struct moxa_port *, int, int); 215static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int); 216static int MoxaPortLineStatus(struct moxa_port *); 217static void MoxaPortFlushData(struct moxa_port *, int); 218static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int); 219static int MoxaPortReadData(struct moxa_port *); 220static int MoxaPortTxQueue(struct moxa_port *); 221static int MoxaPortRxQueue(struct moxa_port *); 222static int MoxaPortTxFree(struct moxa_port *); 223static void MoxaPortTxDisable(struct moxa_port *); 224static void MoxaPortTxEnable(struct moxa_port *); 225static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *); 226static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *); 227static void MoxaSetFifo(struct moxa_port *port, int enable); 228 229/* 230 * I/O functions 231 */ 232 233static DEFINE_SPINLOCK(moxafunc_lock); 234 235static void moxa_wait_finish(void __iomem *ofsAddr) 236{ 237 unsigned long end = jiffies + moxaFuncTout; 238 239 while (readw(ofsAddr + FuncCode) != 0) 240 if (time_after(jiffies, end)) 241 return; 242 if (readw(ofsAddr + FuncCode) != 0 && printk_ratelimit()) 243 printk(KERN_WARNING "moxa function expired\n"); 244} 245 246static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg) 247{ 248 unsigned long flags; 249 spin_lock_irqsave(&moxafunc_lock, flags); 250 writew(arg, ofsAddr + FuncArg); 251 writew(cmd, ofsAddr + FuncCode); 252 moxa_wait_finish(ofsAddr); 253 spin_unlock_irqrestore(&moxafunc_lock, flags); 254} 255 256static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg) 257{ 258 unsigned long flags; 259 u16 ret; 260 spin_lock_irqsave(&moxafunc_lock, flags); 261 writew(arg, ofsAddr + FuncArg); 262 writew(cmd, ofsAddr + FuncCode); 263 moxa_wait_finish(ofsAddr); 264 ret = readw(ofsAddr + FuncArg); 265 spin_unlock_irqrestore(&moxafunc_lock, flags); 266 return ret; 267} 268 269static void moxa_low_water_check(void __iomem *ofsAddr) 270{ 271 u16 rptr, wptr, mask, len; 272 273 if (readb(ofsAddr + FlagStat) & Xoff_state) { 274 rptr = readw(ofsAddr + RXrptr); 275 wptr = readw(ofsAddr + RXwptr); 276 mask = readw(ofsAddr + RX_mask); 277 len = (wptr - rptr) & mask; 278 if (len <= Low_water) 279 moxafunc(ofsAddr, FC_SendXon, 0); 280 } 281} 282 283/* 284 * TTY operations 285 */ 286 287static int moxa_ioctl(struct tty_struct *tty, struct file *file, 288 unsigned int cmd, unsigned long arg) 289{ 290 struct moxa_port *ch = tty->driver_data; 291 void __user *argp = (void __user *)arg; 292 int status, ret = 0; 293 294 if (tty->index == MAX_PORTS) { 295 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE && 296 cmd != MOXA_GETMSTATUS) 297 return -EINVAL; 298 } else if (!ch) 299 return -ENODEV; 300 301 switch (cmd) { 302 case MOXA_GETDATACOUNT: 303 moxaLog.tick = jiffies; 304 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog))) 305 ret = -EFAULT; 306 break; 307 case MOXA_FLUSH_QUEUE: 308 MoxaPortFlushData(ch, arg); 309 break; 310 case MOXA_GET_IOQUEUE: { 311 struct moxaq_str __user *argm = argp; 312 struct moxaq_str tmp; 313 struct moxa_port *p; 314 unsigned int i, j; 315 316 mutex_lock(&moxa_openlock); 317 for (i = 0; i < MAX_BOARDS; i++) { 318 p = moxa_boards[i].ports; 319 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) { 320 memset(&tmp, 0, sizeof(tmp)); 321 if (moxa_boards[i].ready) { 322 tmp.inq = MoxaPortRxQueue(p); 323 tmp.outq = MoxaPortTxQueue(p); 324 } 325 if (copy_to_user(argm, &tmp, sizeof(tmp))) { 326 mutex_unlock(&moxa_openlock); 327 return -EFAULT; 328 } 329 } 330 } 331 mutex_unlock(&moxa_openlock); 332 break; 333 } case MOXA_GET_OQUEUE: 334 status = MoxaPortTxQueue(ch); 335 ret = put_user(status, (unsigned long __user *)argp); 336 break; 337 case MOXA_GET_IQUEUE: 338 status = MoxaPortRxQueue(ch); 339 ret = put_user(status, (unsigned long __user *)argp); 340 break; 341 case MOXA_GETMSTATUS: { 342 struct mxser_mstatus __user *argm = argp; 343 struct mxser_mstatus tmp; 344 struct moxa_port *p; 345 unsigned int i, j; 346 347 mutex_lock(&moxa_openlock); 348 for (i = 0; i < MAX_BOARDS; i++) { 349 p = moxa_boards[i].ports; 350 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) { 351 struct tty_struct *ttyp; 352 memset(&tmp, 0, sizeof(tmp)); 353 if (!moxa_boards[i].ready) 354 goto copy; 355 356 status = MoxaPortLineStatus(p); 357 if (status & 1) 358 tmp.cts = 1; 359 if (status & 2) 360 tmp.dsr = 1; 361 if (status & 4) 362 tmp.dcd = 1; 363 364 ttyp = tty_port_tty_get(&p->port); 365 if (!ttyp || !ttyp->termios) 366 tmp.cflag = p->cflag; 367 else 368 tmp.cflag = ttyp->termios->c_cflag; 369 tty_kref_put(tty); 370copy: 371 if (copy_to_user(argm, &tmp, sizeof(tmp))) { 372 mutex_unlock(&moxa_openlock); 373 return -EFAULT; 374 } 375 } 376 } 377 mutex_unlock(&moxa_openlock); 378 break; 379 } 380 case TIOCGSERIAL: 381 mutex_lock(&ch->port.mutex); 382 ret = moxa_get_serial_info(ch, argp); 383 mutex_unlock(&ch->port.mutex); 384 break; 385 case TIOCSSERIAL: 386 mutex_lock(&ch->port.mutex); 387 ret = moxa_set_serial_info(ch, argp); 388 mutex_unlock(&ch->port.mutex); 389 break; 390 default: 391 ret = -ENOIOCTLCMD; 392 } 393 return ret; 394} 395 396static int moxa_break_ctl(struct tty_struct *tty, int state) 397{ 398 struct moxa_port *port = tty->driver_data; 399 400 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak, 401 Magic_code); 402 return 0; 403} 404 405static const struct tty_operations moxa_ops = { 406 .open = moxa_open, 407 .close = moxa_close, 408 .write = moxa_write, 409 .write_room = moxa_write_room, 410 .flush_buffer = moxa_flush_buffer, 411 .chars_in_buffer = moxa_chars_in_buffer, 412 .ioctl = moxa_ioctl, 413 .set_termios = moxa_set_termios, 414 .stop = moxa_stop, 415 .start = moxa_start, 416 .hangup = moxa_hangup, 417 .break_ctl = moxa_break_ctl, 418 .tiocmget = moxa_tiocmget, 419 .tiocmset = moxa_tiocmset, 420}; 421 422static const struct tty_port_operations moxa_port_ops = { 423 .carrier_raised = moxa_carrier_raised, 424 .dtr_rts = moxa_dtr_rts, 425 .shutdown = moxa_shutdown, 426}; 427 428static struct tty_driver *moxaDriver; 429static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0); 430static DEFINE_SPINLOCK(moxa_lock); 431 432/* 433 * HW init 434 */ 435 436static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model) 437{ 438 switch (brd->boardType) { 439 case MOXA_BOARD_C218_ISA: 440 case MOXA_BOARD_C218_PCI: 441 if (model != 1) 442 goto err; 443 break; 444 case MOXA_BOARD_CP204J: 445 if (model != 3) 446 goto err; 447 break; 448 default: 449 if (model != 2) 450 goto err; 451 break; 452 } 453 return 0; 454err: 455 return -EINVAL; 456} 457 458static int moxa_check_fw(const void *ptr) 459{ 460 const __le16 *lptr = ptr; 461 462 if (*lptr != cpu_to_le16(0x7980)) 463 return -EINVAL; 464 465 return 0; 466} 467 468static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf, 469 size_t len) 470{ 471 void __iomem *baseAddr = brd->basemem; 472 u16 tmp; 473 474 writeb(HW_reset, baseAddr + Control_reg); /* reset */ 475 msleep(10); 476 memset_io(baseAddr, 0, 4096); 477 memcpy_toio(baseAddr, buf, len); /* download BIOS */ 478 writeb(0, baseAddr + Control_reg); /* restart */ 479 480 msleep(2000); 481 482 switch (brd->boardType) { 483 case MOXA_BOARD_C218_ISA: 484 case MOXA_BOARD_C218_PCI: 485 tmp = readw(baseAddr + C218_key); 486 if (tmp != C218_KeyCode) 487 goto err; 488 break; 489 case MOXA_BOARD_CP204J: 490 tmp = readw(baseAddr + C218_key); 491 if (tmp != CP204J_KeyCode) 492 goto err; 493 break; 494 default: 495 tmp = readw(baseAddr + C320_key); 496 if (tmp != C320_KeyCode) 497 goto err; 498 tmp = readw(baseAddr + C320_status); 499 if (tmp != STS_init) { 500 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic " 501 "module not found\n"); 502 return -EIO; 503 } 504 break; 505 } 506 507 return 0; 508err: 509 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n"); 510 return -EIO; 511} 512 513static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr, 514 size_t len) 515{ 516 void __iomem *baseAddr = brd->basemem; 517 518 if (len < 7168) { 519 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n"); 520 return -EINVAL; 521 } 522 523 writew(len - 7168 - 2, baseAddr + C320bapi_len); 524 writeb(1, baseAddr + Control_reg); /* Select Page 1 */ 525 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168); 526 writeb(2, baseAddr + Control_reg); /* Select Page 2 */ 527 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168); 528 529 return 0; 530} 531 532static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr, 533 size_t len) 534{ 535 void __iomem *baseAddr = brd->basemem; 536 const __le16 *uptr = ptr; 537 size_t wlen, len2, j; 538 unsigned long key, loadbuf, loadlen, checksum, checksum_ok; 539 unsigned int i, retry; 540 u16 usum, keycode; 541 542 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode : 543 C218_KeyCode; 544 545 switch (brd->boardType) { 546 case MOXA_BOARD_CP204J: 547 case MOXA_BOARD_C218_ISA: 548 case MOXA_BOARD_C218_PCI: 549 key = C218_key; 550 loadbuf = C218_LoadBuf; 551 loadlen = C218DLoad_len; 552 checksum = C218check_sum; 553 checksum_ok = C218chksum_ok; 554 break; 555 default: 556 key = C320_key; 557 keycode = C320_KeyCode; 558 loadbuf = C320_LoadBuf; 559 loadlen = C320DLoad_len; 560 checksum = C320check_sum; 561 checksum_ok = C320chksum_ok; 562 break; 563 } 564 565 usum = 0; 566 wlen = len >> 1; 567 for (i = 0; i < wlen; i++) 568 usum += le16_to_cpu(uptr[i]); 569 retry = 0; 570 do { 571 wlen = len >> 1; 572 j = 0; 573 while (wlen) { 574 len2 = (wlen > 2048) ? 2048 : wlen; 575 wlen -= len2; 576 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1); 577 j += len2 << 1; 578 579 writew(len2, baseAddr + loadlen); 580 writew(0, baseAddr + key); 581 for (i = 0; i < 100; i++) { 582 if (readw(baseAddr + key) == keycode) 583 break; 584 msleep(10); 585 } 586 if (readw(baseAddr + key) != keycode) 587 return -EIO; 588 } 589 writew(0, baseAddr + loadlen); 590 writew(usum, baseAddr + checksum); 591 writew(0, baseAddr + key); 592 for (i = 0; i < 100; i++) { 593 if (readw(baseAddr + key) == keycode) 594 break; 595 msleep(10); 596 } 597 retry++; 598 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3)); 599 if (readb(baseAddr + checksum_ok) != 1) 600 return -EIO; 601 602 writew(0, baseAddr + key); 603 for (i = 0; i < 600; i++) { 604 if (readw(baseAddr + Magic_no) == Magic_code) 605 break; 606 msleep(10); 607 } 608 if (readw(baseAddr + Magic_no) != Magic_code) 609 return -EIO; 610 611 if (MOXA_IS_320(brd)) { 612 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */ 613 writew(0x3800, baseAddr + TMS320_PORT1); 614 writew(0x3900, baseAddr + TMS320_PORT2); 615 writew(28499, baseAddr + TMS320_CLOCK); 616 } else { 617 writew(0x3200, baseAddr + TMS320_PORT1); 618 writew(0x3400, baseAddr + TMS320_PORT2); 619 writew(19999, baseAddr + TMS320_CLOCK); 620 } 621 } 622 writew(1, baseAddr + Disable_IRQ); 623 writew(0, baseAddr + Magic_no); 624 for (i = 0; i < 500; i++) { 625 if (readw(baseAddr + Magic_no) == Magic_code) 626 break; 627 msleep(10); 628 } 629 if (readw(baseAddr + Magic_no) != Magic_code) 630 return -EIO; 631 632 if (MOXA_IS_320(brd)) { 633 j = readw(baseAddr + Module_cnt); 634 if (j <= 0) 635 return -EIO; 636 brd->numPorts = j * 8; 637 writew(j, baseAddr + Module_no); 638 writew(0, baseAddr + Magic_no); 639 for (i = 0; i < 600; i++) { 640 if (readw(baseAddr + Magic_no) == Magic_code) 641 break; 642 msleep(10); 643 } 644 if (readw(baseAddr + Magic_no) != Magic_code) 645 return -EIO; 646 } 647 brd->intNdx = baseAddr + IRQindex; 648 brd->intPend = baseAddr + IRQpending; 649 brd->intTable = baseAddr + IRQtable; 650 651 return 0; 652} 653 654static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr, 655 size_t len) 656{ 657 void __iomem *ofsAddr, *baseAddr = brd->basemem; 658 struct moxa_port *port; 659 int retval, i; 660 661 if (len % 2) { 662 printk(KERN_ERR "MOXA: bios length is not even\n"); 663 return -EINVAL; 664 } 665 666 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */ 667 if (retval) 668 return retval; 669 670 switch (brd->boardType) { 671 case MOXA_BOARD_C218_ISA: 672 case MOXA_BOARD_C218_PCI: 673 case MOXA_BOARD_CP204J: 674 port = brd->ports; 675 for (i = 0; i < brd->numPorts; i++, port++) { 676 port->board = brd; 677 port->DCDState = 0; 678 port->tableAddr = baseAddr + Extern_table + 679 Extern_size * i; 680 ofsAddr = port->tableAddr; 681 writew(C218rx_mask, ofsAddr + RX_mask); 682 writew(C218tx_mask, ofsAddr + TX_mask); 683 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb); 684 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb); 685 686 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb); 687 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb); 688 689 } 690 break; 691 default: 692 port = brd->ports; 693 for (i = 0; i < brd->numPorts; i++, port++) { 694 port->board = brd; 695 port->DCDState = 0; 696 port->tableAddr = baseAddr + Extern_table + 697 Extern_size * i; 698 ofsAddr = port->tableAddr; 699 switch (brd->numPorts) { 700 case 8: 701 writew(C320p8rx_mask, ofsAddr + RX_mask); 702 writew(C320p8tx_mask, ofsAddr + TX_mask); 703 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb); 704 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb); 705 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb); 706 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb); 707 708 break; 709 case 16: 710 writew(C320p16rx_mask, ofsAddr + RX_mask); 711 writew(C320p16tx_mask, ofsAddr + TX_mask); 712 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb); 713 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb); 714 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb); 715 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb); 716 break; 717 718 case 24: 719 writew(C320p24rx_mask, ofsAddr + RX_mask); 720 writew(C320p24tx_mask, ofsAddr + TX_mask); 721 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb); 722 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb); 723 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb); 724 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb); 725 break; 726 case 32: 727 writew(C320p32rx_mask, ofsAddr + RX_mask); 728 writew(C320p32tx_mask, ofsAddr + TX_mask); 729 writew(C320p32tx_ofs, ofsAddr + Ofs_txb); 730 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb); 731 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb); 732 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb); 733 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb); 734 break; 735 } 736 } 737 break; 738 } 739 return 0; 740} 741 742static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw) 743{ 744 const void *ptr = fw->data; 745 char rsn[64]; 746 u16 lens[5]; 747 size_t len; 748 unsigned int a, lenp, lencnt; 749 int ret = -EINVAL; 750 struct { 751 __le32 magic; /* 0x34303430 */ 752 u8 reserved1[2]; 753 u8 type; /* UNIX = 3 */ 754 u8 model; /* C218T=1, C320T=2, CP204=3 */ 755 u8 reserved2[8]; 756 __le16 len[5]; 757 } const *hdr = ptr; 758 759 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens)); 760 761 if (fw->size < MOXA_FW_HDRLEN) { 762 strcpy(rsn, "too short (even header won't fit)"); 763 goto err; 764 } 765 if (hdr->magic != cpu_to_le32(0x30343034)) { 766 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic)); 767 goto err; 768 } 769 if (hdr->type != 3) { 770 sprintf(rsn, "not for linux, type is %u", hdr->type); 771 goto err; 772 } 773 if (moxa_check_fw_model(brd, hdr->model)) { 774 sprintf(rsn, "not for this card, model is %u", hdr->model); 775 goto err; 776 } 777 778 len = MOXA_FW_HDRLEN; 779 lencnt = hdr->model == 2 ? 5 : 3; 780 for (a = 0; a < ARRAY_SIZE(lens); a++) { 781 lens[a] = le16_to_cpu(hdr->len[a]); 782 if (lens[a] && len + lens[a] <= fw->size && 783 moxa_check_fw(&fw->data[len])) 784 printk(KERN_WARNING "MOXA firmware: unexpected input " 785 "at offset %u, but going on\n", (u32)len); 786 if (!lens[a] && a < lencnt) { 787 sprintf(rsn, "too few entries in fw file"); 788 goto err; 789 } 790 len += lens[a]; 791 } 792 793 if (len != fw->size) { 794 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size, 795 (u32)len); 796 goto err; 797 } 798 799 ptr += MOXA_FW_HDRLEN; 800 lenp = 0; /* bios */ 801 802 strcpy(rsn, "read above"); 803 804 ret = moxa_load_bios(brd, ptr, lens[lenp]); 805 if (ret) 806 goto err; 807 808 /* we skip the tty section (lens[1]), since we don't need it */ 809 ptr += lens[lenp] + lens[lenp + 1]; 810 lenp += 2; /* comm */ 811 812 if (hdr->model == 2) { 813 ret = moxa_load_320b(brd, ptr, lens[lenp]); 814 if (ret) 815 goto err; 816 /* skip another tty */ 817 ptr += lens[lenp] + lens[lenp + 1]; 818 lenp += 2; 819 } 820 821 ret = moxa_load_code(brd, ptr, lens[lenp]); 822 if (ret) 823 goto err; 824 825 return 0; 826err: 827 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn); 828 return ret; 829} 830 831static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev) 832{ 833 const struct firmware *fw; 834 const char *file; 835 struct moxa_port *p; 836 unsigned int i; 837 int ret; 838 839 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports), 840 GFP_KERNEL); 841 if (brd->ports == NULL) { 842 printk(KERN_ERR "cannot allocate memory for ports\n"); 843 ret = -ENOMEM; 844 goto err; 845 } 846 847 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) { 848 tty_port_init(&p->port); 849 p->port.ops = &moxa_port_ops; 850 p->type = PORT_16550A; 851 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; 852 } 853 854 switch (brd->boardType) { 855 case MOXA_BOARD_C218_ISA: 856 case MOXA_BOARD_C218_PCI: 857 file = "c218tunx.cod"; 858 break; 859 case MOXA_BOARD_CP204J: 860 file = "cp204unx.cod"; 861 break; 862 default: 863 file = "c320tunx.cod"; 864 break; 865 } 866 867 ret = request_firmware(&fw, file, dev); 868 if (ret) { 869 printk(KERN_ERR "MOXA: request_firmware failed. Make sure " 870 "you've placed '%s' file into your firmware " 871 "loader directory (e.g. /lib/firmware)\n", 872 file); 873 goto err_free; 874 } 875 876 ret = moxa_load_fw(brd, fw); 877 878 release_firmware(fw); 879 880 if (ret) 881 goto err_free; 882 883 spin_lock_bh(&moxa_lock); 884 brd->ready = 1; 885 if (!timer_pending(&moxaTimer)) 886 mod_timer(&moxaTimer, jiffies + HZ / 50); 887 spin_unlock_bh(&moxa_lock); 888 889 return 0; 890err_free: 891 kfree(brd->ports); 892err: 893 return ret; 894} 895 896static void moxa_board_deinit(struct moxa_board_conf *brd) 897{ 898 unsigned int a, opened; 899 900 mutex_lock(&moxa_openlock); 901 spin_lock_bh(&moxa_lock); 902 brd->ready = 0; 903 spin_unlock_bh(&moxa_lock); 904 905 /* pci hot-un-plug support */ 906 for (a = 0; a < brd->numPorts; a++) 907 if (brd->ports[a].port.flags & ASYNC_INITIALIZED) { 908 struct tty_struct *tty = tty_port_tty_get( 909 &brd->ports[a].port); 910 if (tty) { 911 tty_hangup(tty); 912 tty_kref_put(tty); 913 } 914 } 915 while (1) { 916 opened = 0; 917 for (a = 0; a < brd->numPorts; a++) 918 if (brd->ports[a].port.flags & ASYNC_INITIALIZED) 919 opened++; 920 mutex_unlock(&moxa_openlock); 921 if (!opened) 922 break; 923 msleep(50); 924 mutex_lock(&moxa_openlock); 925 } 926 927 iounmap(brd->basemem); 928 brd->basemem = NULL; 929 kfree(brd->ports); 930} 931 932#ifdef CONFIG_PCI 933static int __devinit moxa_pci_probe(struct pci_dev *pdev, 934 const struct pci_device_id *ent) 935{ 936 struct moxa_board_conf *board; 937 unsigned int i; 938 int board_type = ent->driver_data; 939 int retval; 940 941 retval = pci_enable_device(pdev); 942 if (retval) { 943 dev_err(&pdev->dev, "can't enable pci device\n"); 944 goto err; 945 } 946 947 for (i = 0; i < MAX_BOARDS; i++) 948 if (moxa_boards[i].basemem == NULL) 949 break; 950 951 retval = -ENODEV; 952 if (i >= MAX_BOARDS) { 953 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards " 954 "found. Board is ignored.\n", MAX_BOARDS); 955 goto err; 956 } 957 958 board = &moxa_boards[i]; 959 960 retval = pci_request_region(pdev, 2, "moxa-base"); 961 if (retval) { 962 dev_err(&pdev->dev, "can't request pci region 2\n"); 963 goto err; 964 } 965 966 board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000); 967 if (board->basemem == NULL) { 968 dev_err(&pdev->dev, "can't remap io space 2\n"); 969 goto err_reg; 970 } 971 972 board->boardType = board_type; 973 switch (board_type) { 974 case MOXA_BOARD_C218_ISA: 975 case MOXA_BOARD_C218_PCI: 976 board->numPorts = 8; 977 break; 978 979 case MOXA_BOARD_CP204J: 980 board->numPorts = 4; 981 break; 982 default: 983 board->numPorts = 0; 984 break; 985 } 986 board->busType = MOXA_BUS_TYPE_PCI; 987 988 retval = moxa_init_board(board, &pdev->dev); 989 if (retval) 990 goto err_base; 991 992 pci_set_drvdata(pdev, board); 993 994 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n", 995 moxa_brdname[board_type - 1], board->numPorts); 996 997 return 0; 998err_base: 999 iounmap(board->basemem); 1000 board->basemem = NULL; 1001err_reg: 1002 pci_release_region(pdev, 2); 1003err: 1004 return retval; 1005} 1006 1007static void __devexit moxa_pci_remove(struct pci_dev *pdev) 1008{ 1009 struct moxa_board_conf *brd = pci_get_drvdata(pdev); 1010 1011 moxa_board_deinit(brd); 1012 1013 pci_release_region(pdev, 2); 1014} 1015 1016static struct pci_driver moxa_pci_driver = { 1017 .name = "moxa", 1018 .id_table = moxa_pcibrds, 1019 .probe = moxa_pci_probe, 1020 .remove = __devexit_p(moxa_pci_remove) 1021}; 1022#endif /* CONFIG_PCI */ 1023 1024static int __init moxa_init(void) 1025{ 1026 unsigned int isabrds = 0; 1027 int retval = 0; 1028 1029 printk(KERN_INFO "MOXA Intellio family driver version %s\n", 1030 MOXA_VERSION); 1031 moxaDriver = alloc_tty_driver(MAX_PORTS + 1); 1032 if (!moxaDriver) 1033 return -ENOMEM; 1034 1035 moxaDriver->owner = THIS_MODULE; 1036 moxaDriver->name = "ttyMX"; 1037 moxaDriver->major = ttymajor; 1038 moxaDriver->minor_start = 0; 1039 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL; 1040 moxaDriver->subtype = SERIAL_TYPE_NORMAL; 1041 moxaDriver->init_termios = tty_std_termios; 1042 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; 1043 moxaDriver->init_termios.c_ispeed = 9600; 1044 moxaDriver->init_termios.c_ospeed = 9600; 1045 moxaDriver->flags = TTY_DRIVER_REAL_RAW; 1046 tty_set_operations(moxaDriver, &moxa_ops); 1047 1048 if (tty_register_driver(moxaDriver)) { 1049 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n"); 1050 put_tty_driver(moxaDriver); 1051 return -1; 1052 } 1053 1054 /* Find the boards defined from module args. */ 1055#ifdef MODULE 1056 { 1057 struct moxa_board_conf *brd = moxa_boards; 1058 unsigned int i; 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#endif 1093 1094#ifdef CONFIG_PCI 1095 retval = pci_register_driver(&moxa_pci_driver); 1096 if (retval) { 1097 printk(KERN_ERR "Can't register MOXA pci driver!\n"); 1098 if (isabrds) 1099 retval = 0; 1100 } 1101#endif 1102 1103 return retval; 1104} 1105 1106static void __exit moxa_exit(void) 1107{ 1108 unsigned int i; 1109 1110#ifdef CONFIG_PCI 1111 pci_unregister_driver(&moxa_pci_driver); 1112#endif 1113 1114 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */ 1115 if (moxa_boards[i].ready) 1116 moxa_board_deinit(&moxa_boards[i]); 1117 1118 del_timer_sync(&moxaTimer); 1119 1120 if (tty_unregister_driver(moxaDriver)) 1121 printk(KERN_ERR "Couldn't unregister MOXA Intellio family " 1122 "serial driver\n"); 1123 put_tty_driver(moxaDriver); 1124} 1125 1126module_init(moxa_init); 1127module_exit(moxa_exit); 1128 1129static void moxa_shutdown(struct tty_port *port) 1130{ 1131 struct moxa_port *ch = container_of(port, struct moxa_port, port); 1132 MoxaPortDisable(ch); 1133 MoxaPortFlushData(ch, 2); 1134 clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags); 1135} 1136 1137static int moxa_carrier_raised(struct tty_port *port) 1138{ 1139 struct moxa_port *ch = container_of(port, struct moxa_port, port); 1140 int dcd; 1141 1142 spin_lock_irq(&port->lock); 1143 dcd = ch->DCDState; 1144 spin_unlock_irq(&port->lock); 1145 return dcd; 1146} 1147 1148static void moxa_dtr_rts(struct tty_port *port, int onoff) 1149{ 1150 struct moxa_port *ch = container_of(port, struct moxa_port, port); 1151 MoxaPortLineCtrl(ch, onoff, onoff); 1152} 1153 1154 1155static int moxa_open(struct tty_struct *tty, struct file *filp) 1156{ 1157 struct moxa_board_conf *brd; 1158 struct moxa_port *ch; 1159 int port; 1160 int retval; 1161 1162 port = tty->index; 1163 if (port == MAX_PORTS) { 1164 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM; 1165 } 1166 if (mutex_lock_interruptible(&moxa_openlock)) 1167 return -ERESTARTSYS; 1168 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD]; 1169 if (!brd->ready) { 1170 mutex_unlock(&moxa_openlock); 1171 return -ENODEV; 1172 } 1173 1174 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) { 1175 mutex_unlock(&moxa_openlock); 1176 return -ENODEV; 1177 } 1178 1179 ch = &brd->ports[port % MAX_PORTS_PER_BOARD]; 1180 ch->port.count++; 1181 tty->driver_data = ch; 1182 tty_port_tty_set(&ch->port, tty); 1183 mutex_lock(&ch->port.mutex); 1184 if (!(ch->port.flags & ASYNC_INITIALIZED)) { 1185 ch->statusflags = 0; 1186 moxa_set_tty_param(tty, tty->termios); 1187 MoxaPortLineCtrl(ch, 1, 1); 1188 MoxaPortEnable(ch); 1189 MoxaSetFifo(ch, ch->type == PORT_16550A); 1190 ch->port.flags |= ASYNC_INITIALIZED; 1191 } 1192 mutex_unlock(&ch->port.mutex); 1193 mutex_unlock(&moxa_openlock); 1194 1195 retval = tty_port_block_til_ready(&ch->port, tty, filp); 1196 if (retval == 0) 1197 set_bit(ASYNCB_NORMAL_ACTIVE, &ch->port.flags); 1198 return retval; 1199} 1200 1201static void moxa_close(struct tty_struct *tty, struct file *filp) 1202{ 1203 struct moxa_port *ch = tty->driver_data; 1204 ch->cflag = tty->termios->c_cflag; 1205 tty_port_close(&ch->port, tty, filp); 1206} 1207 1208static int moxa_write(struct tty_struct *tty, 1209 const unsigned char *buf, int count) 1210{ 1211 struct moxa_port *ch = tty->driver_data; 1212 int len; 1213 1214 if (ch == NULL) 1215 return 0; 1216 1217 spin_lock_bh(&moxa_lock); 1218 len = MoxaPortWriteData(tty, buf, count); 1219 spin_unlock_bh(&moxa_lock); 1220 1221 set_bit(LOWWAIT, &ch->statusflags); 1222 return len; 1223} 1224 1225static int moxa_write_room(struct tty_struct *tty) 1226{ 1227 struct moxa_port *ch; 1228 1229 if (tty->stopped) 1230 return 0; 1231 ch = tty->driver_data; 1232 if (ch == NULL) 1233 return 0; 1234 return MoxaPortTxFree(ch); 1235} 1236 1237static void moxa_flush_buffer(struct tty_struct *tty) 1238{ 1239 struct moxa_port *ch = tty->driver_data; 1240 1241 if (ch == NULL) 1242 return; 1243 MoxaPortFlushData(ch, 1); 1244 tty_wakeup(tty); 1245} 1246 1247static int moxa_chars_in_buffer(struct tty_struct *tty) 1248{ 1249 struct moxa_port *ch = tty->driver_data; 1250 int chars; 1251 1252 chars = MoxaPortTxQueue(ch); 1253 if (chars) 1254 /* 1255 * Make it possible to wakeup anything waiting for output 1256 * in tty_ioctl.c, etc. 1257 */ 1258 set_bit(EMPTYWAIT, &ch->statusflags); 1259 return chars; 1260} 1261 1262static int moxa_tiocmget(struct tty_struct *tty, struct file *file) 1263{ 1264 struct moxa_port *ch = tty->driver_data; 1265 int flag = 0, dtr, rts; 1266 1267 MoxaPortGetLineOut(ch, &dtr, &rts); 1268 if (dtr) 1269 flag |= TIOCM_DTR; 1270 if (rts) 1271 flag |= TIOCM_RTS; 1272 dtr = MoxaPortLineStatus(ch); 1273 if (dtr & 1) 1274 flag |= TIOCM_CTS; 1275 if (dtr & 2) 1276 flag |= TIOCM_DSR; 1277 if (dtr & 4) 1278 flag |= TIOCM_CD; 1279 return flag; 1280} 1281 1282static int moxa_tiocmset(struct tty_struct *tty, struct file *file, 1283 unsigned int set, unsigned int clear) 1284{ 1285 struct moxa_port *ch; 1286 int port; 1287 int dtr, rts; 1288 1289 port = tty->index; 1290 mutex_lock(&moxa_openlock); 1291 ch = tty->driver_data; 1292 if (!ch) { 1293 mutex_unlock(&moxa_openlock); 1294 return -EINVAL; 1295 } 1296 1297 MoxaPortGetLineOut(ch, &dtr, &rts); 1298 if (set & TIOCM_RTS) 1299 rts = 1; 1300 if (set & TIOCM_DTR) 1301 dtr = 1; 1302 if (clear & TIOCM_RTS) 1303 rts = 0; 1304 if (clear & TIOCM_DTR) 1305 dtr = 0; 1306 MoxaPortLineCtrl(ch, dtr, rts); 1307 mutex_unlock(&moxa_openlock); 1308 return 0; 1309} 1310 1311static void moxa_set_termios(struct tty_struct *tty, 1312 struct ktermios *old_termios) 1313{ 1314 struct moxa_port *ch = tty->driver_data; 1315 1316 if (ch == NULL) 1317 return; 1318 moxa_set_tty_param(tty, old_termios); 1319 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty)) 1320 wake_up_interruptible(&ch->port.open_wait); 1321} 1322 1323static void moxa_stop(struct tty_struct *tty) 1324{ 1325 struct moxa_port *ch = tty->driver_data; 1326 1327 if (ch == NULL) 1328 return; 1329 MoxaPortTxDisable(ch); 1330 set_bit(TXSTOPPED, &ch->statusflags); 1331} 1332 1333 1334static void moxa_start(struct tty_struct *tty) 1335{ 1336 struct moxa_port *ch = tty->driver_data; 1337 1338 if (ch == NULL) 1339 return; 1340 1341 if (!(ch->statusflags & TXSTOPPED)) 1342 return; 1343 1344 MoxaPortTxEnable(ch); 1345 clear_bit(TXSTOPPED, &ch->statusflags); 1346} 1347 1348static void moxa_hangup(struct tty_struct *tty) 1349{ 1350 struct moxa_port *ch = tty->driver_data; 1351 tty_port_hangup(&ch->port); 1352} 1353 1354static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd) 1355{ 1356 struct tty_struct *tty; 1357 unsigned long flags; 1358 dcd = !!dcd; 1359 1360 spin_lock_irqsave(&p->port.lock, flags); 1361 if (dcd != p->DCDState) { 1362 p->DCDState = dcd; 1363 spin_unlock_irqrestore(&p->port.lock, flags); 1364 tty = tty_port_tty_get(&p->port); 1365 if (tty && C_CLOCAL(tty) && !dcd) 1366 tty_hangup(tty); 1367 tty_kref_put(tty); 1368 } 1369 else 1370 spin_unlock_irqrestore(&p->port.lock, flags); 1371} 1372 1373static int moxa_poll_port(struct moxa_port *p, unsigned int handle, 1374 u16 __iomem *ip) 1375{ 1376 struct tty_struct *tty = tty_port_tty_get(&p->port); 1377 void __iomem *ofsAddr; 1378 unsigned int inited = p->port.flags & ASYNC_INITIALIZED; 1379 u16 intr; 1380 1381 if (tty) { 1382 if (test_bit(EMPTYWAIT, &p->statusflags) && 1383 MoxaPortTxQueue(p) == 0) { 1384 clear_bit(EMPTYWAIT, &p->statusflags); 1385 tty_wakeup(tty); 1386 } 1387 if (test_bit(LOWWAIT, &p->statusflags) && !tty->stopped && 1388 MoxaPortTxQueue(p) <= WAKEUP_CHARS) { 1389 clear_bit(LOWWAIT, &p->statusflags); 1390 tty_wakeup(tty); 1391 } 1392 1393 if (inited && !test_bit(TTY_THROTTLED, &tty->flags) && 1394 MoxaPortRxQueue(p) > 0) { /* RX */ 1395 MoxaPortReadData(p); 1396 tty_schedule_flip(tty); 1397 } 1398 } else { 1399 clear_bit(EMPTYWAIT, &p->statusflags); 1400 MoxaPortFlushData(p, 0); /* flush RX */ 1401 } 1402 1403 if (!handle) /* nothing else to do */ 1404 goto put; 1405 1406 intr = readw(ip); /* port irq status */ 1407 if (intr == 0) 1408 goto put; 1409 1410 writew(0, ip); /* ACK port */ 1411 ofsAddr = p->tableAddr; 1412 if (intr & IntrTx) /* disable tx intr */ 1413 writew(readw(ofsAddr + HostStat) & ~WakeupTx, 1414 ofsAddr + HostStat); 1415 1416 if (!inited) 1417 goto put; 1418 1419 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */ 1420 tty_insert_flip_char(tty, 0, TTY_BREAK); 1421 tty_schedule_flip(tty); 1422 } 1423 1424 if (intr & IntrLine) 1425 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state); 1426put: 1427 tty_kref_put(tty); 1428 1429 return 0; 1430} 1431 1432static void moxa_poll(unsigned long ignored) 1433{ 1434 struct moxa_board_conf *brd; 1435 u16 __iomem *ip; 1436 unsigned int card, port, served = 0; 1437 1438 spin_lock(&moxa_lock); 1439 for (card = 0; card < MAX_BOARDS; card++) { 1440 brd = &moxa_boards[card]; 1441 if (!brd->ready) 1442 continue; 1443 1444 served++; 1445 1446 ip = NULL; 1447 if (readb(brd->intPend) == 0xff) 1448 ip = brd->intTable + readb(brd->intNdx); 1449 1450 for (port = 0; port < brd->numPorts; port++) 1451 moxa_poll_port(&brd->ports[port], !!ip, ip + port); 1452 1453 if (ip) 1454 writeb(0, brd->intPend); /* ACK */ 1455 1456 if (moxaLowWaterChk) { 1457 struct moxa_port *p = brd->ports; 1458 for (port = 0; port < brd->numPorts; port++, p++) 1459 if (p->lowChkFlag) { 1460 p->lowChkFlag = 0; 1461 moxa_low_water_check(p->tableAddr); 1462 } 1463 } 1464 } 1465 moxaLowWaterChk = 0; 1466 1467 if (served) 1468 mod_timer(&moxaTimer, jiffies + HZ / 50); 1469 spin_unlock(&moxa_lock); 1470} 1471 1472/******************************************************************************/ 1473 1474static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios) 1475{ 1476 register struct ktermios *ts = tty->termios; 1477 struct moxa_port *ch = tty->driver_data; 1478 int rts, cts, txflow, rxflow, xany, baud; 1479 1480 rts = cts = txflow = rxflow = xany = 0; 1481 if (ts->c_cflag & CRTSCTS) 1482 rts = cts = 1; 1483 if (ts->c_iflag & IXON) 1484 txflow = 1; 1485 if (ts->c_iflag & IXOFF) 1486 rxflow = 1; 1487 if (ts->c_iflag & IXANY) 1488 xany = 1; 1489 1490 /* Clear the features we don't support */ 1491 ts->c_cflag &= ~CMSPAR; 1492 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany); 1493 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty)); 1494 if (baud == -1) 1495 baud = tty_termios_baud_rate(old_termios); 1496 /* Not put the baud rate into the termios data */ 1497 tty_encode_baud_rate(tty, baud, baud); 1498} 1499 1500/***************************************************************************** 1501 * Driver level functions: * 1502 *****************************************************************************/ 1503 1504static void MoxaPortFlushData(struct moxa_port *port, int mode) 1505{ 1506 void __iomem *ofsAddr; 1507 if (mode < 0 || mode > 2) 1508 return; 1509 ofsAddr = port->tableAddr; 1510 moxafunc(ofsAddr, FC_FlushQueue, mode); 1511 if (mode != 1) { 1512 port->lowChkFlag = 0; 1513 moxa_low_water_check(ofsAddr); 1514 } 1515} 1516 1517/* 1518 * Moxa Port Number Description: 1519 * 1520 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And, 1521 * the port number using in MOXA driver functions will be 0 to 31 for 1522 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96 1523 * to 127 for fourth. For example, if you setup three MOXA boards, 1524 * first board is C218, second board is C320-16 and third board is 1525 * C320-32. The port number of first board (C218 - 8 ports) is from 1526 * 0 to 7. The port number of second board (C320 - 16 ports) is form 1527 * 32 to 47. The port number of third board (C320 - 32 ports) is from 1528 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to 1529 * 127 will be invalid. 1530 * 1531 * 1532 * Moxa Functions Description: 1533 * 1534 * Function 1: Driver initialization routine, this routine must be 1535 * called when initialized driver. 1536 * Syntax: 1537 * void MoxaDriverInit(); 1538 * 1539 * 1540 * Function 2: Moxa driver private IOCTL command processing. 1541 * Syntax: 1542 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port); 1543 * 1544 * unsigned int cmd : IOCTL command 1545 * unsigned long arg : IOCTL argument 1546 * int port : port number (0 - 127) 1547 * 1548 * return: 0 (OK) 1549 * -EINVAL 1550 * -ENOIOCTLCMD 1551 * 1552 * 1553 * Function 6: Enable this port to start Tx/Rx data. 1554 * Syntax: 1555 * void MoxaPortEnable(int port); 1556 * int port : port number (0 - 127) 1557 * 1558 * 1559 * Function 7: Disable this port 1560 * Syntax: 1561 * void MoxaPortDisable(int port); 1562 * int port : port number (0 - 127) 1563 * 1564 * 1565 * Function 10: Setting baud rate of this port. 1566 * Syntax: 1567 * speed_t MoxaPortSetBaud(int port, speed_t baud); 1568 * int port : port number (0 - 127) 1569 * long baud : baud rate (50 - 115200) 1570 * 1571 * return: 0 : this port is invalid or baud < 50 1572 * 50 - 115200 : the real baud rate set to the port, if 1573 * the argument baud is large than maximun 1574 * available baud rate, the real setting 1575 * baud rate will be the maximun baud rate. 1576 * 1577 * 1578 * Function 12: Configure the port. 1579 * Syntax: 1580 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud); 1581 * int port : port number (0 - 127) 1582 * struct ktermios * termio : termio structure pointer 1583 * speed_t baud : baud rate 1584 * 1585 * return: -1 : this port is invalid or termio == NULL 1586 * 0 : setting O.K. 1587 * 1588 * 1589 * Function 13: Get the DTR/RTS state of this port. 1590 * Syntax: 1591 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); 1592 * int port : port number (0 - 127) 1593 * int * dtrState : pointer to INT to receive the current DTR 1594 * state. (if NULL, this function will not 1595 * write to this address) 1596 * int * rtsState : pointer to INT to receive the current RTS 1597 * state. (if NULL, this function will not 1598 * write to this address) 1599 * 1600 * return: -1 : this port is invalid 1601 * 0 : O.K. 1602 * 1603 * 1604 * Function 14: Setting the DTR/RTS output state of this port. 1605 * Syntax: 1606 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState); 1607 * int port : port number (0 - 127) 1608 * int dtrState : DTR output state (0: off, 1: on) 1609 * int rtsState : RTS output state (0: off, 1: on) 1610 * 1611 * 1612 * Function 15: Setting the flow control of this port. 1613 * Syntax: 1614 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow, 1615 * int txFlow,int xany); 1616 * int port : port number (0 - 127) 1617 * int rtsFlow : H/W RTS flow control (0: no, 1: yes) 1618 * int ctsFlow : H/W CTS flow control (0: no, 1: yes) 1619 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes) 1620 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes) 1621 * int xany : S/W XANY flow control (0: no, 1: yes) 1622 * 1623 * 1624 * Function 16: Get ths line status of this port 1625 * Syntax: 1626 * int MoxaPortLineStatus(int port); 1627 * int port : port number (0 - 127) 1628 * 1629 * return: Bit 0 - CTS state (0: off, 1: on) 1630 * Bit 1 - DSR state (0: off, 1: on) 1631 * Bit 2 - DCD state (0: off, 1: on) 1632 * 1633 * 1634 * Function 19: Flush the Rx/Tx buffer data of this port. 1635 * Syntax: 1636 * void MoxaPortFlushData(int port, int mode); 1637 * int port : port number (0 - 127) 1638 * int mode 1639 * 0 : flush the Rx buffer 1640 * 1 : flush the Tx buffer 1641 * 2 : flush the Rx and Tx buffer 1642 * 1643 * 1644 * Function 20: Write data. 1645 * Syntax: 1646 * int MoxaPortWriteData(int port, unsigned char * buffer, int length); 1647 * int port : port number (0 - 127) 1648 * unsigned char * buffer : pointer to write data buffer. 1649 * int length : write data length 1650 * 1651 * return: 0 - length : real write data length 1652 * 1653 * 1654 * Function 21: Read data. 1655 * Syntax: 1656 * int MoxaPortReadData(int port, struct tty_struct *tty); 1657 * int port : port number (0 - 127) 1658 * struct tty_struct *tty : tty for data 1659 * 1660 * return: 0 - length : real read data length 1661 * 1662 * 1663 * Function 24: Get the Tx buffer current queued data bytes 1664 * Syntax: 1665 * int MoxaPortTxQueue(int port); 1666 * int port : port number (0 - 127) 1667 * 1668 * return: .. : Tx buffer current queued data bytes 1669 * 1670 * 1671 * Function 25: Get the Tx buffer current free space 1672 * Syntax: 1673 * int MoxaPortTxFree(int port); 1674 * int port : port number (0 - 127) 1675 * 1676 * return: .. : Tx buffer current free space 1677 * 1678 * 1679 * Function 26: Get the Rx buffer current queued data bytes 1680 * Syntax: 1681 * int MoxaPortRxQueue(int port); 1682 * int port : port number (0 - 127) 1683 * 1684 * return: .. : Rx buffer current queued data bytes 1685 * 1686 * 1687 * Function 28: Disable port data transmission. 1688 * Syntax: 1689 * void MoxaPortTxDisable(int port); 1690 * int port : port number (0 - 127) 1691 * 1692 * 1693 * Function 29: Enable port data transmission. 1694 * Syntax: 1695 * void MoxaPortTxEnable(int port); 1696 * int port : port number (0 - 127) 1697 * 1698 * 1699 * Function 31: Get the received BREAK signal count and reset it. 1700 * Syntax: 1701 * int MoxaPortResetBrkCnt(int port); 1702 * int port : port number (0 - 127) 1703 * 1704 * return: 0 - .. : BREAK signal count 1705 * 1706 * 1707 */ 1708 1709static void MoxaPortEnable(struct moxa_port *port) 1710{ 1711 void __iomem *ofsAddr; 1712 u16 lowwater = 512; 1713 1714 ofsAddr = port->tableAddr; 1715 writew(lowwater, ofsAddr + Low_water); 1716 if (MOXA_IS_320(port->board)) 1717 moxafunc(ofsAddr, FC_SetBreakIrq, 0); 1718 else 1719 writew(readw(ofsAddr + HostStat) | WakeupBreak, 1720 ofsAddr + HostStat); 1721 1722 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code); 1723 moxafunc(ofsAddr, FC_FlushQueue, 2); 1724 1725 moxafunc(ofsAddr, FC_EnableCH, Magic_code); 1726 MoxaPortLineStatus(port); 1727} 1728 1729static void MoxaPortDisable(struct moxa_port *port) 1730{ 1731 void __iomem *ofsAddr = port->tableAddr; 1732 1733 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */ 1734 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code); 1735 writew(0, ofsAddr + HostStat); 1736 moxafunc(ofsAddr, FC_DisableCH, Magic_code); 1737} 1738 1739static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud) 1740{ 1741 void __iomem *ofsAddr = port->tableAddr; 1742 unsigned int clock, val; 1743 speed_t max; 1744 1745 max = MOXA_IS_320(port->board) ? 460800 : 921600; 1746 if (baud < 50) 1747 return 0; 1748 if (baud > max) 1749 baud = max; 1750 clock = 921600; 1751 val = clock / baud; 1752 moxafunc(ofsAddr, FC_SetBaud, val); 1753 baud = clock / val; 1754 return baud; 1755} 1756 1757static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio, 1758 speed_t baud) 1759{ 1760 void __iomem *ofsAddr; 1761 tcflag_t cflag; 1762 tcflag_t mode = 0; 1763 1764 ofsAddr = port->tableAddr; 1765 cflag = termio->c_cflag; /* termio->c_cflag */ 1766 1767 mode = termio->c_cflag & CSIZE; 1768 if (mode == CS5) 1769 mode = MX_CS5; 1770 else if (mode == CS6) 1771 mode = MX_CS6; 1772 else if (mode == CS7) 1773 mode = MX_CS7; 1774 else if (mode == CS8) 1775 mode = MX_CS8; 1776 1777 if (termio->c_cflag & CSTOPB) { 1778 if (mode == MX_CS5) 1779 mode |= MX_STOP15; 1780 else 1781 mode |= MX_STOP2; 1782 } else 1783 mode |= MX_STOP1; 1784 1785 if (termio->c_cflag & PARENB) { 1786 if (termio->c_cflag & PARODD) 1787 mode |= MX_PARODD; 1788 else 1789 mode |= MX_PAREVEN; 1790 } else 1791 mode |= MX_PARNONE; 1792 1793 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode); 1794 1795 if (MOXA_IS_320(port->board) && baud >= 921600) 1796 return -1; 1797 1798 baud = MoxaPortSetBaud(port, baud); 1799 1800 if (termio->c_iflag & (IXON | IXOFF | IXANY)) { 1801 spin_lock_irq(&moxafunc_lock); 1802 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg); 1803 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1); 1804 writeb(FC_SetXonXoff, ofsAddr + FuncCode); 1805 moxa_wait_finish(ofsAddr); 1806 spin_unlock_irq(&moxafunc_lock); 1807 1808 } 1809 return baud; 1810} 1811 1812static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState, 1813 int *rtsState) 1814{ 1815 if (dtrState) 1816 *dtrState = !!(port->lineCtrl & DTR_ON); 1817 if (rtsState) 1818 *rtsState = !!(port->lineCtrl & RTS_ON); 1819 1820 return 0; 1821} 1822 1823static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts) 1824{ 1825 u8 mode = 0; 1826 1827 if (dtr) 1828 mode |= DTR_ON; 1829 if (rts) 1830 mode |= RTS_ON; 1831 port->lineCtrl = mode; 1832 moxafunc(port->tableAddr, FC_LineControl, mode); 1833} 1834 1835static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts, 1836 int txflow, int rxflow, int txany) 1837{ 1838 int mode = 0; 1839 1840 if (rts) 1841 mode |= RTS_FlowCtl; 1842 if (cts) 1843 mode |= CTS_FlowCtl; 1844 if (txflow) 1845 mode |= Tx_FlowCtl; 1846 if (rxflow) 1847 mode |= Rx_FlowCtl; 1848 if (txany) 1849 mode |= IXM_IXANY; 1850 moxafunc(port->tableAddr, FC_SetFlowCtl, mode); 1851} 1852 1853static int MoxaPortLineStatus(struct moxa_port *port) 1854{ 1855 void __iomem *ofsAddr; 1856 int val; 1857 1858 ofsAddr = port->tableAddr; 1859 if (MOXA_IS_320(port->board)) 1860 val = moxafuncret(ofsAddr, FC_LineStatus, 0); 1861 else 1862 val = readw(ofsAddr + FlagStat) >> 4; 1863 val &= 0x0B; 1864 if (val & 8) 1865 val |= 4; 1866 moxa_new_dcdstate(port, val & 8); 1867 val &= 7; 1868 return val; 1869} 1870 1871static int MoxaPortWriteData(struct tty_struct *tty, 1872 const unsigned char *buffer, int len) 1873{ 1874 struct moxa_port *port = tty->driver_data; 1875 void __iomem *baseAddr, *ofsAddr, *ofs; 1876 unsigned int c, total; 1877 u16 head, tail, tx_mask, spage, epage; 1878 u16 pageno, pageofs, bufhead; 1879 1880 ofsAddr = port->tableAddr; 1881 baseAddr = port->board->basemem; 1882 tx_mask = readw(ofsAddr + TX_mask); 1883 spage = readw(ofsAddr + Page_txb); 1884 epage = readw(ofsAddr + EndPage_txb); 1885 tail = readw(ofsAddr + TXwptr); 1886 head = readw(ofsAddr + TXrptr); 1887 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask); 1888 if (c > len) 1889 c = len; 1890 moxaLog.txcnt[port->port.tty->index] += c; 1891 total = c; 1892 if (spage == epage) { 1893 bufhead = readw(ofsAddr + Ofs_txb); 1894 writew(spage, baseAddr + Control_reg); 1895 while (c > 0) { 1896 if (head > tail) 1897 len = head - tail - 1; 1898 else 1899 len = tx_mask + 1 - tail; 1900 len = (c > len) ? len : c; 1901 ofs = baseAddr + DynPage_addr + bufhead + tail; 1902 memcpy_toio(ofs, buffer, len); 1903 buffer += len; 1904 tail = (tail + len) & tx_mask; 1905 c -= len; 1906 } 1907 } else { 1908 pageno = spage + (tail >> 13); 1909 pageofs = tail & Page_mask; 1910 while (c > 0) { 1911 len = Page_size - pageofs; 1912 if (len > c) 1913 len = c; 1914 writeb(pageno, baseAddr + Control_reg); 1915 ofs = baseAddr + DynPage_addr + pageofs; 1916 memcpy_toio(ofs, buffer, len); 1917 buffer += len; 1918 if (++pageno == epage) 1919 pageno = spage; 1920 pageofs = 0; 1921 c -= len; 1922 } 1923 tail = (tail + total) & tx_mask; 1924 } 1925 writew(tail, ofsAddr + TXwptr); 1926 writeb(1, ofsAddr + CD180TXirq); /* start to send */ 1927 return total; 1928} 1929 1930static int MoxaPortReadData(struct moxa_port *port) 1931{ 1932 struct tty_struct *tty = port->port.tty; 1933 unsigned char *dst; 1934 void __iomem *baseAddr, *ofsAddr, *ofs; 1935 unsigned int count, len, total; 1936 u16 tail, rx_mask, spage, epage; 1937 u16 pageno, pageofs, bufhead, head; 1938 1939 ofsAddr = port->tableAddr; 1940 baseAddr = port->board->basemem; 1941 head = readw(ofsAddr + RXrptr); 1942 tail = readw(ofsAddr + RXwptr); 1943 rx_mask = readw(ofsAddr + RX_mask); 1944 spage = readw(ofsAddr + Page_rxb); 1945 epage = readw(ofsAddr + EndPage_rxb); 1946 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1); 1947 if (count == 0) 1948 return 0; 1949 1950 total = count; 1951 moxaLog.rxcnt[tty->index] += total; 1952 if (spage == epage) { 1953 bufhead = readw(ofsAddr + Ofs_rxb); 1954 writew(spage, baseAddr + Control_reg); 1955 while (count > 0) { 1956 ofs = baseAddr + DynPage_addr + bufhead + head; 1957 len = (tail >= head) ? (tail - head) : 1958 (rx_mask + 1 - head); 1959 len = tty_prepare_flip_string(tty, &dst, 1960 min(len, count)); 1961 memcpy_fromio(dst, ofs, len); 1962 head = (head + len) & rx_mask; 1963 count -= len; 1964 } 1965 } else { 1966 pageno = spage + (head >> 13); 1967 pageofs = head & Page_mask; 1968 while (count > 0) { 1969 writew(pageno, baseAddr + Control_reg); 1970 ofs = baseAddr + DynPage_addr + pageofs; 1971 len = tty_prepare_flip_string(tty, &dst, 1972 min(Page_size - pageofs, count)); 1973 memcpy_fromio(dst, ofs, len); 1974 1975 count -= len; 1976 pageofs = (pageofs + len) & Page_mask; 1977 if (pageofs == 0 && ++pageno == epage) 1978 pageno = spage; 1979 } 1980 head = (head + total) & rx_mask; 1981 } 1982 writew(head, ofsAddr + RXrptr); 1983 if (readb(ofsAddr + FlagStat) & Xoff_state) { 1984 moxaLowWaterChk = 1; 1985 port->lowChkFlag = 1; 1986 } 1987 return total; 1988} 1989 1990 1991static int MoxaPortTxQueue(struct moxa_port *port) 1992{ 1993 void __iomem *ofsAddr = port->tableAddr; 1994 u16 rptr, wptr, mask; 1995 1996 rptr = readw(ofsAddr + TXrptr); 1997 wptr = readw(ofsAddr + TXwptr); 1998 mask = readw(ofsAddr + TX_mask); 1999 return (wptr - rptr) & mask; 2000} 2001 2002static int MoxaPortTxFree(struct moxa_port *port) 2003{ 2004 void __iomem *ofsAddr = port->tableAddr; 2005 u16 rptr, wptr, mask; 2006 2007 rptr = readw(ofsAddr + TXrptr); 2008 wptr = readw(ofsAddr + TXwptr); 2009 mask = readw(ofsAddr + TX_mask); 2010 return mask - ((wptr - rptr) & mask); 2011} 2012 2013static int MoxaPortRxQueue(struct moxa_port *port) 2014{ 2015 void __iomem *ofsAddr = port->tableAddr; 2016 u16 rptr, wptr, mask; 2017 2018 rptr = readw(ofsAddr + RXrptr); 2019 wptr = readw(ofsAddr + RXwptr); 2020 mask = readw(ofsAddr + RX_mask); 2021 return (wptr - rptr) & mask; 2022} 2023 2024static void MoxaPortTxDisable(struct moxa_port *port) 2025{ 2026 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code); 2027} 2028 2029static void MoxaPortTxEnable(struct moxa_port *port) 2030{ 2031 moxafunc(port->tableAddr, FC_SetXonState, Magic_code); 2032} 2033 2034static int moxa_get_serial_info(struct moxa_port *info, 2035 struct serial_struct __user *retinfo) 2036{ 2037 struct serial_struct tmp = { 2038 .type = info->type, 2039 .line = info->port.tty->index, 2040 .flags = info->port.flags, 2041 .baud_base = 921600, 2042 .close_delay = info->port.close_delay 2043 }; 2044 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0; 2045} 2046 2047 2048static int moxa_set_serial_info(struct moxa_port *info, 2049 struct serial_struct __user *new_info) 2050{ 2051 struct serial_struct new_serial; 2052 2053 if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) 2054 return -EFAULT; 2055 2056 if (new_serial.irq != 0 || new_serial.port != 0 || 2057 new_serial.custom_divisor != 0 || 2058 new_serial.baud_base != 921600) 2059 return -EPERM; 2060 2061 if (!capable(CAP_SYS_ADMIN)) { 2062 if (((new_serial.flags & ~ASYNC_USR_MASK) != 2063 (info->port.flags & ~ASYNC_USR_MASK))) 2064 return -EPERM; 2065 } else 2066 info->port.close_delay = new_serial.close_delay * HZ / 100; 2067 2068 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS); 2069 new_serial.flags |= (info->port.flags & ASYNC_FLAGS); 2070 2071 MoxaSetFifo(info, new_serial.type == PORT_16550A); 2072 2073 info->type = new_serial.type; 2074 return 0; 2075} 2076 2077 2078 2079/***************************************************************************** 2080 * Static local functions: * 2081 *****************************************************************************/ 2082 2083static void MoxaSetFifo(struct moxa_port *port, int enable) 2084{ 2085 void __iomem *ofsAddr = port->tableAddr; 2086 2087 if (!enable) { 2088 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0); 2089 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1); 2090 } else { 2091 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3); 2092 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16); 2093 } 2094} 2095