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/io.h> 50 #include <asm/uaccess.h> 51 52 #include "moxa.h" 53 54 #define MOXA_VERSION "6.0k" 55 56 #define MOXA_FW_HDRLEN 32 57 58 #define MOXAMAJOR 172 59 60 #define MAX_BOARDS 4 /* Don't change this value */ 61 #define MAX_PORTS_PER_BOARD 32 /* Don't change this value */ 62 #define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD) 63 64 #define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \ 65 (brd)->boardType == MOXA_BOARD_C320_PCI) 66 67 /* 68 * Define the Moxa PCI vendor and device IDs. 69 */ 70 #define MOXA_BUS_TYPE_ISA 0 71 #define MOXA_BUS_TYPE_PCI 1 72 73 enum { 74 MOXA_BOARD_C218_PCI = 1, 75 MOXA_BOARD_C218_ISA, 76 MOXA_BOARD_C320_PCI, 77 MOXA_BOARD_C320_ISA, 78 MOXA_BOARD_CP204J, 79 }; 80 81 static char *moxa_brdname[] = 82 { 83 "C218 Turbo PCI series", 84 "C218 Turbo ISA series", 85 "C320 Turbo PCI series", 86 "C320 Turbo ISA series", 87 "CP-204J series", 88 }; 89 90 #ifdef CONFIG_PCI 91 static struct pci_device_id moxa_pcibrds[] = { 92 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218), 93 .driver_data = MOXA_BOARD_C218_PCI }, 94 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320), 95 .driver_data = MOXA_BOARD_C320_PCI }, 96 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J), 97 .driver_data = MOXA_BOARD_CP204J }, 98 { 0 } 99 }; 100 MODULE_DEVICE_TABLE(pci, moxa_pcibrds); 101 #endif /* CONFIG_PCI */ 102 103 struct moxa_port; 104 105 static struct moxa_board_conf { 106 int boardType; 107 int numPorts; 108 int busType; 109 110 unsigned int ready; 111 112 struct moxa_port *ports; 113 114 void __iomem *basemem; 115 void __iomem *intNdx; 116 void __iomem *intPend; 117 void __iomem *intTable; 118 } moxa_boards[MAX_BOARDS]; 119 120 struct mxser_mstatus { 121 tcflag_t cflag; 122 int cts; 123 int dsr; 124 int ri; 125 int dcd; 126 }; 127 128 struct moxaq_str { 129 int inq; 130 int outq; 131 }; 132 133 struct moxa_port { 134 struct tty_port port; 135 struct moxa_board_conf *board; 136 void __iomem *tableAddr; 137 138 int type; 139 int cflag; 140 unsigned long statusflags; 141 142 u8 DCDState; /* Protected by the port lock */ 143 u8 lineCtrl; 144 u8 lowChkFlag; 145 }; 146 147 struct mon_str { 148 int tick; 149 int rxcnt[MAX_PORTS]; 150 int txcnt[MAX_PORTS]; 151 }; 152 153 /* statusflags */ 154 #define TXSTOPPED 1 155 #define LOWWAIT 2 156 #define EMPTYWAIT 3 157 158 159 #define WAKEUP_CHARS 256 160 161 static int ttymajor = MOXAMAJOR; 162 static struct mon_str moxaLog; 163 static unsigned int moxaFuncTout = HZ / 2; 164 static unsigned int moxaLowWaterChk; 165 static DEFINE_MUTEX(moxa_openlock); 166 static DEFINE_SPINLOCK(moxa_lock); 167 168 static unsigned long baseaddr[MAX_BOARDS]; 169 static unsigned int type[MAX_BOARDS]; 170 static unsigned int numports[MAX_BOARDS]; 171 static struct tty_port moxa_service_port; 172 173 MODULE_AUTHOR("William Chen"); 174 MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver"); 175 MODULE_LICENSE("GPL"); 176 MODULE_FIRMWARE("c218tunx.cod"); 177 MODULE_FIRMWARE("cp204unx.cod"); 178 MODULE_FIRMWARE("c320tunx.cod"); 179 180 module_param_array(type, uint, NULL, 0); 181 MODULE_PARM_DESC(type, "card type: C218=2, C320=4"); 182 module_param_array(baseaddr, ulong, NULL, 0); 183 MODULE_PARM_DESC(baseaddr, "base address"); 184 module_param_array(numports, uint, NULL, 0); 185 MODULE_PARM_DESC(numports, "numports (ignored for C218)"); 186 187 module_param(ttymajor, int, 0); 188 189 /* 190 * static functions: 191 */ 192 static int moxa_open(struct tty_struct *, struct file *); 193 static void moxa_close(struct tty_struct *, struct file *); 194 static int moxa_write(struct tty_struct *, const unsigned char *, int); 195 static int moxa_write_room(struct tty_struct *); 196 static void moxa_flush_buffer(struct tty_struct *); 197 static int moxa_chars_in_buffer(struct tty_struct *); 198 static void moxa_set_termios(struct tty_struct *, struct ktermios *); 199 static void moxa_stop(struct tty_struct *); 200 static void moxa_start(struct tty_struct *); 201 static void moxa_hangup(struct tty_struct *); 202 static int moxa_tiocmget(struct tty_struct *tty); 203 static int moxa_tiocmset(struct tty_struct *tty, 204 unsigned int set, unsigned int clear); 205 static void moxa_poll(unsigned long); 206 static void moxa_set_tty_param(struct tty_struct *, struct ktermios *); 207 static void moxa_shutdown(struct tty_port *); 208 static int moxa_carrier_raised(struct tty_port *); 209 static void moxa_dtr_rts(struct tty_port *, int); 210 /* 211 * moxa board interface functions: 212 */ 213 static void MoxaPortEnable(struct moxa_port *); 214 static void MoxaPortDisable(struct moxa_port *); 215 static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t); 216 static int MoxaPortGetLineOut(struct moxa_port *, int *, int *); 217 static void MoxaPortLineCtrl(struct moxa_port *, int, int); 218 static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int); 219 static int MoxaPortLineStatus(struct moxa_port *); 220 static void MoxaPortFlushData(struct moxa_port *, int); 221 static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int); 222 static int MoxaPortReadData(struct moxa_port *); 223 static int MoxaPortTxQueue(struct moxa_port *); 224 static int MoxaPortRxQueue(struct moxa_port *); 225 static int MoxaPortTxFree(struct moxa_port *); 226 static void MoxaPortTxDisable(struct moxa_port *); 227 static void MoxaPortTxEnable(struct moxa_port *); 228 static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *); 229 static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *); 230 static void MoxaSetFifo(struct moxa_port *port, int enable); 231 232 /* 233 * I/O functions 234 */ 235 236 static DEFINE_SPINLOCK(moxafunc_lock); 237 238 static void moxa_wait_finish(void __iomem *ofsAddr) 239 { 240 unsigned long end = jiffies + moxaFuncTout; 241 242 while (readw(ofsAddr + FuncCode) != 0) 243 if (time_after(jiffies, end)) 244 return; 245 if (readw(ofsAddr + FuncCode) != 0) 246 printk_ratelimited(KERN_WARNING "moxa function expired\n"); 247 } 248 249 static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg) 250 { 251 unsigned long flags; 252 spin_lock_irqsave(&moxafunc_lock, flags); 253 writew(arg, ofsAddr + FuncArg); 254 writew(cmd, ofsAddr + FuncCode); 255 moxa_wait_finish(ofsAddr); 256 spin_unlock_irqrestore(&moxafunc_lock, flags); 257 } 258 259 static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg) 260 { 261 unsigned long flags; 262 u16 ret; 263 spin_lock_irqsave(&moxafunc_lock, flags); 264 writew(arg, ofsAddr + FuncArg); 265 writew(cmd, ofsAddr + FuncCode); 266 moxa_wait_finish(ofsAddr); 267 ret = readw(ofsAddr + FuncArg); 268 spin_unlock_irqrestore(&moxafunc_lock, flags); 269 return ret; 270 } 271 272 static void moxa_low_water_check(void __iomem *ofsAddr) 273 { 274 u16 rptr, wptr, mask, len; 275 276 if (readb(ofsAddr + FlagStat) & Xoff_state) { 277 rptr = readw(ofsAddr + RXrptr); 278 wptr = readw(ofsAddr + RXwptr); 279 mask = readw(ofsAddr + RX_mask); 280 len = (wptr - rptr) & mask; 281 if (len <= Low_water) 282 moxafunc(ofsAddr, FC_SendXon, 0); 283 } 284 } 285 286 /* 287 * TTY operations 288 */ 289 290 static int moxa_ioctl(struct tty_struct *tty, 291 unsigned int cmd, unsigned long arg) 292 { 293 struct moxa_port *ch = tty->driver_data; 294 void __user *argp = (void __user *)arg; 295 int status, ret = 0; 296 297 if (tty->index == MAX_PORTS) { 298 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE && 299 cmd != MOXA_GETMSTATUS) 300 return -EINVAL; 301 } else if (!ch) 302 return -ENODEV; 303 304 switch (cmd) { 305 case MOXA_GETDATACOUNT: 306 moxaLog.tick = jiffies; 307 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog))) 308 ret = -EFAULT; 309 break; 310 case MOXA_FLUSH_QUEUE: 311 MoxaPortFlushData(ch, arg); 312 break; 313 case MOXA_GET_IOQUEUE: { 314 struct moxaq_str __user *argm = argp; 315 struct moxaq_str tmp; 316 struct moxa_port *p; 317 unsigned int i, j; 318 319 for (i = 0; i < MAX_BOARDS; i++) { 320 p = moxa_boards[i].ports; 321 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) { 322 memset(&tmp, 0, sizeof(tmp)); 323 spin_lock_bh(&moxa_lock); 324 if (moxa_boards[i].ready) { 325 tmp.inq = MoxaPortRxQueue(p); 326 tmp.outq = MoxaPortTxQueue(p); 327 } 328 spin_unlock_bh(&moxa_lock); 329 if (copy_to_user(argm, &tmp, sizeof(tmp))) 330 return -EFAULT; 331 } 332 } 333 break; 334 } case MOXA_GET_OQUEUE: 335 status = MoxaPortTxQueue(ch); 336 ret = put_user(status, (unsigned long __user *)argp); 337 break; 338 case MOXA_GET_IQUEUE: 339 status = MoxaPortRxQueue(ch); 340 ret = put_user(status, (unsigned long __user *)argp); 341 break; 342 case MOXA_GETMSTATUS: { 343 struct mxser_mstatus __user *argm = argp; 344 struct mxser_mstatus tmp; 345 struct moxa_port *p; 346 unsigned int i, j; 347 348 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 spin_lock_bh(&moxa_lock); 354 if (!moxa_boards[i].ready) { 355 spin_unlock_bh(&moxa_lock); 356 goto copy; 357 } 358 359 status = MoxaPortLineStatus(p); 360 spin_unlock_bh(&moxa_lock); 361 362 if (status & 1) 363 tmp.cts = 1; 364 if (status & 2) 365 tmp.dsr = 1; 366 if (status & 4) 367 tmp.dcd = 1; 368 369 ttyp = tty_port_tty_get(&p->port); 370 if (!ttyp) 371 tmp.cflag = p->cflag; 372 else 373 tmp.cflag = ttyp->termios.c_cflag; 374 tty_kref_put(ttyp); 375 copy: 376 if (copy_to_user(argm, &tmp, sizeof(tmp))) 377 return -EFAULT; 378 } 379 } 380 break; 381 } 382 case TIOCGSERIAL: 383 mutex_lock(&ch->port.mutex); 384 ret = moxa_get_serial_info(ch, argp); 385 mutex_unlock(&ch->port.mutex); 386 break; 387 case TIOCSSERIAL: 388 mutex_lock(&ch->port.mutex); 389 ret = moxa_set_serial_info(ch, argp); 390 mutex_unlock(&ch->port.mutex); 391 break; 392 default: 393 ret = -ENOIOCTLCMD; 394 } 395 return ret; 396 } 397 398 static int moxa_break_ctl(struct tty_struct *tty, int state) 399 { 400 struct moxa_port *port = tty->driver_data; 401 402 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak, 403 Magic_code); 404 return 0; 405 } 406 407 static const struct tty_operations moxa_ops = { 408 .open = moxa_open, 409 .close = moxa_close, 410 .write = moxa_write, 411 .write_room = moxa_write_room, 412 .flush_buffer = moxa_flush_buffer, 413 .chars_in_buffer = moxa_chars_in_buffer, 414 .ioctl = moxa_ioctl, 415 .set_termios = moxa_set_termios, 416 .stop = moxa_stop, 417 .start = moxa_start, 418 .hangup = moxa_hangup, 419 .break_ctl = moxa_break_ctl, 420 .tiocmget = moxa_tiocmget, 421 .tiocmset = moxa_tiocmset, 422 }; 423 424 static const struct tty_port_operations moxa_port_ops = { 425 .carrier_raised = moxa_carrier_raised, 426 .dtr_rts = moxa_dtr_rts, 427 .shutdown = moxa_shutdown, 428 }; 429 430 static struct tty_driver *moxaDriver; 431 static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0); 432 433 /* 434 * HW init 435 */ 436 437 static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model) 438 { 439 switch (brd->boardType) { 440 case MOXA_BOARD_C218_ISA: 441 case MOXA_BOARD_C218_PCI: 442 if (model != 1) 443 goto err; 444 break; 445 case MOXA_BOARD_CP204J: 446 if (model != 3) 447 goto err; 448 break; 449 default: 450 if (model != 2) 451 goto err; 452 break; 453 } 454 return 0; 455 err: 456 return -EINVAL; 457 } 458 459 static int moxa_check_fw(const void *ptr) 460 { 461 const __le16 *lptr = ptr; 462 463 if (*lptr != cpu_to_le16(0x7980)) 464 return -EINVAL; 465 466 return 0; 467 } 468 469 static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf, 470 size_t len) 471 { 472 void __iomem *baseAddr = brd->basemem; 473 u16 tmp; 474 475 writeb(HW_reset, baseAddr + Control_reg); /* reset */ 476 msleep(10); 477 memset_io(baseAddr, 0, 4096); 478 memcpy_toio(baseAddr, buf, len); /* download BIOS */ 479 writeb(0, baseAddr + Control_reg); /* restart */ 480 481 msleep(2000); 482 483 switch (brd->boardType) { 484 case MOXA_BOARD_C218_ISA: 485 case MOXA_BOARD_C218_PCI: 486 tmp = readw(baseAddr + C218_key); 487 if (tmp != C218_KeyCode) 488 goto err; 489 break; 490 case MOXA_BOARD_CP204J: 491 tmp = readw(baseAddr + C218_key); 492 if (tmp != CP204J_KeyCode) 493 goto err; 494 break; 495 default: 496 tmp = readw(baseAddr + C320_key); 497 if (tmp != C320_KeyCode) 498 goto err; 499 tmp = readw(baseAddr + C320_status); 500 if (tmp != STS_init) { 501 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic " 502 "module not found\n"); 503 return -EIO; 504 } 505 break; 506 } 507 508 return 0; 509 err: 510 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n"); 511 return -EIO; 512 } 513 514 static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr, 515 size_t len) 516 { 517 void __iomem *baseAddr = brd->basemem; 518 519 if (len < 7168) { 520 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n"); 521 return -EINVAL; 522 } 523 524 writew(len - 7168 - 2, baseAddr + C320bapi_len); 525 writeb(1, baseAddr + Control_reg); /* Select Page 1 */ 526 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168); 527 writeb(2, baseAddr + Control_reg); /* Select Page 2 */ 528 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168); 529 530 return 0; 531 } 532 533 static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr, 534 size_t len) 535 { 536 void __iomem *baseAddr = brd->basemem; 537 const __le16 *uptr = ptr; 538 size_t wlen, len2, j; 539 unsigned long key, loadbuf, loadlen, checksum, checksum_ok; 540 unsigned int i, retry; 541 u16 usum, keycode; 542 543 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode : 544 C218_KeyCode; 545 546 switch (brd->boardType) { 547 case MOXA_BOARD_CP204J: 548 case MOXA_BOARD_C218_ISA: 549 case MOXA_BOARD_C218_PCI: 550 key = C218_key; 551 loadbuf = C218_LoadBuf; 552 loadlen = C218DLoad_len; 553 checksum = C218check_sum; 554 checksum_ok = C218chksum_ok; 555 break; 556 default: 557 key = C320_key; 558 keycode = C320_KeyCode; 559 loadbuf = C320_LoadBuf; 560 loadlen = C320DLoad_len; 561 checksum = C320check_sum; 562 checksum_ok = C320chksum_ok; 563 break; 564 } 565 566 usum = 0; 567 wlen = len >> 1; 568 for (i = 0; i < wlen; i++) 569 usum += le16_to_cpu(uptr[i]); 570 retry = 0; 571 do { 572 wlen = len >> 1; 573 j = 0; 574 while (wlen) { 575 len2 = (wlen > 2048) ? 2048 : wlen; 576 wlen -= len2; 577 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1); 578 j += len2 << 1; 579 580 writew(len2, baseAddr + loadlen); 581 writew(0, baseAddr + key); 582 for (i = 0; i < 100; i++) { 583 if (readw(baseAddr + key) == keycode) 584 break; 585 msleep(10); 586 } 587 if (readw(baseAddr + key) != keycode) 588 return -EIO; 589 } 590 writew(0, baseAddr + loadlen); 591 writew(usum, baseAddr + checksum); 592 writew(0, baseAddr + key); 593 for (i = 0; i < 100; i++) { 594 if (readw(baseAddr + key) == keycode) 595 break; 596 msleep(10); 597 } 598 retry++; 599 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3)); 600 if (readb(baseAddr + checksum_ok) != 1) 601 return -EIO; 602 603 writew(0, baseAddr + key); 604 for (i = 0; i < 600; i++) { 605 if (readw(baseAddr + Magic_no) == Magic_code) 606 break; 607 msleep(10); 608 } 609 if (readw(baseAddr + Magic_no) != Magic_code) 610 return -EIO; 611 612 if (MOXA_IS_320(brd)) { 613 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */ 614 writew(0x3800, baseAddr + TMS320_PORT1); 615 writew(0x3900, baseAddr + TMS320_PORT2); 616 writew(28499, baseAddr + TMS320_CLOCK); 617 } else { 618 writew(0x3200, baseAddr + TMS320_PORT1); 619 writew(0x3400, baseAddr + TMS320_PORT2); 620 writew(19999, baseAddr + TMS320_CLOCK); 621 } 622 } 623 writew(1, baseAddr + Disable_IRQ); 624 writew(0, baseAddr + Magic_no); 625 for (i = 0; i < 500; i++) { 626 if (readw(baseAddr + Magic_no) == Magic_code) 627 break; 628 msleep(10); 629 } 630 if (readw(baseAddr + Magic_no) != Magic_code) 631 return -EIO; 632 633 if (MOXA_IS_320(brd)) { 634 j = readw(baseAddr + Module_cnt); 635 if (j <= 0) 636 return -EIO; 637 brd->numPorts = j * 8; 638 writew(j, baseAddr + Module_no); 639 writew(0, baseAddr + Magic_no); 640 for (i = 0; i < 600; i++) { 641 if (readw(baseAddr + Magic_no) == Magic_code) 642 break; 643 msleep(10); 644 } 645 if (readw(baseAddr + Magic_no) != Magic_code) 646 return -EIO; 647 } 648 brd->intNdx = baseAddr + IRQindex; 649 brd->intPend = baseAddr + IRQpending; 650 brd->intTable = baseAddr + IRQtable; 651 652 return 0; 653 } 654 655 static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr, 656 size_t len) 657 { 658 void __iomem *ofsAddr, *baseAddr = brd->basemem; 659 struct moxa_port *port; 660 int retval, i; 661 662 if (len % 2) { 663 printk(KERN_ERR "MOXA: bios length is not even\n"); 664 return -EINVAL; 665 } 666 667 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */ 668 if (retval) 669 return retval; 670 671 switch (brd->boardType) { 672 case MOXA_BOARD_C218_ISA: 673 case MOXA_BOARD_C218_PCI: 674 case MOXA_BOARD_CP204J: 675 port = brd->ports; 676 for (i = 0; i < brd->numPorts; i++, port++) { 677 port->board = brd; 678 port->DCDState = 0; 679 port->tableAddr = baseAddr + Extern_table + 680 Extern_size * i; 681 ofsAddr = port->tableAddr; 682 writew(C218rx_mask, ofsAddr + RX_mask); 683 writew(C218tx_mask, ofsAddr + TX_mask); 684 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb); 685 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb); 686 687 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb); 688 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb); 689 690 } 691 break; 692 default: 693 port = brd->ports; 694 for (i = 0; i < brd->numPorts; i++, port++) { 695 port->board = brd; 696 port->DCDState = 0; 697 port->tableAddr = baseAddr + Extern_table + 698 Extern_size * i; 699 ofsAddr = port->tableAddr; 700 switch (brd->numPorts) { 701 case 8: 702 writew(C320p8rx_mask, ofsAddr + RX_mask); 703 writew(C320p8tx_mask, ofsAddr + TX_mask); 704 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb); 705 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb); 706 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb); 707 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb); 708 709 break; 710 case 16: 711 writew(C320p16rx_mask, ofsAddr + RX_mask); 712 writew(C320p16tx_mask, ofsAddr + TX_mask); 713 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb); 714 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb); 715 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb); 716 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb); 717 break; 718 719 case 24: 720 writew(C320p24rx_mask, ofsAddr + RX_mask); 721 writew(C320p24tx_mask, ofsAddr + TX_mask); 722 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb); 723 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb); 724 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb); 725 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb); 726 break; 727 case 32: 728 writew(C320p32rx_mask, ofsAddr + RX_mask); 729 writew(C320p32tx_mask, ofsAddr + TX_mask); 730 writew(C320p32tx_ofs, ofsAddr + Ofs_txb); 731 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb); 732 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb); 733 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb); 734 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb); 735 break; 736 } 737 } 738 break; 739 } 740 return 0; 741 } 742 743 static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw) 744 { 745 const void *ptr = fw->data; 746 char rsn[64]; 747 u16 lens[5]; 748 size_t len; 749 unsigned int a, lenp, lencnt; 750 int ret = -EINVAL; 751 struct { 752 __le32 magic; /* 0x34303430 */ 753 u8 reserved1[2]; 754 u8 type; /* UNIX = 3 */ 755 u8 model; /* C218T=1, C320T=2, CP204=3 */ 756 u8 reserved2[8]; 757 __le16 len[5]; 758 } const *hdr = ptr; 759 760 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens)); 761 762 if (fw->size < MOXA_FW_HDRLEN) { 763 strcpy(rsn, "too short (even header won't fit)"); 764 goto err; 765 } 766 if (hdr->magic != cpu_to_le32(0x30343034)) { 767 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic)); 768 goto err; 769 } 770 if (hdr->type != 3) { 771 sprintf(rsn, "not for linux, type is %u", hdr->type); 772 goto err; 773 } 774 if (moxa_check_fw_model(brd, hdr->model)) { 775 sprintf(rsn, "not for this card, model is %u", hdr->model); 776 goto err; 777 } 778 779 len = MOXA_FW_HDRLEN; 780 lencnt = hdr->model == 2 ? 5 : 3; 781 for (a = 0; a < ARRAY_SIZE(lens); a++) { 782 lens[a] = le16_to_cpu(hdr->len[a]); 783 if (lens[a] && len + lens[a] <= fw->size && 784 moxa_check_fw(&fw->data[len])) 785 printk(KERN_WARNING "MOXA firmware: unexpected input " 786 "at offset %u, but going on\n", (u32)len); 787 if (!lens[a] && a < lencnt) { 788 sprintf(rsn, "too few entries in fw file"); 789 goto err; 790 } 791 len += lens[a]; 792 } 793 794 if (len != fw->size) { 795 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size, 796 (u32)len); 797 goto err; 798 } 799 800 ptr += MOXA_FW_HDRLEN; 801 lenp = 0; /* bios */ 802 803 strcpy(rsn, "read above"); 804 805 ret = moxa_load_bios(brd, ptr, lens[lenp]); 806 if (ret) 807 goto err; 808 809 /* we skip the tty section (lens[1]), since we don't need it */ 810 ptr += lens[lenp] + lens[lenp + 1]; 811 lenp += 2; /* comm */ 812 813 if (hdr->model == 2) { 814 ret = moxa_load_320b(brd, ptr, lens[lenp]); 815 if (ret) 816 goto err; 817 /* skip another tty */ 818 ptr += lens[lenp] + lens[lenp + 1]; 819 lenp += 2; 820 } 821 822 ret = moxa_load_code(brd, ptr, lens[lenp]); 823 if (ret) 824 goto err; 825 826 return 0; 827 err: 828 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn); 829 return ret; 830 } 831 832 static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev) 833 { 834 const struct firmware *fw; 835 const char *file; 836 struct moxa_port *p; 837 unsigned int i, first_idx; 838 int ret; 839 840 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports), 841 GFP_KERNEL); 842 if (brd->ports == NULL) { 843 printk(KERN_ERR "cannot allocate memory for ports\n"); 844 ret = -ENOMEM; 845 goto err; 846 } 847 848 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) { 849 tty_port_init(&p->port); 850 p->port.ops = &moxa_port_ops; 851 p->type = PORT_16550A; 852 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; 853 } 854 855 switch (brd->boardType) { 856 case MOXA_BOARD_C218_ISA: 857 case MOXA_BOARD_C218_PCI: 858 file = "c218tunx.cod"; 859 break; 860 case MOXA_BOARD_CP204J: 861 file = "cp204unx.cod"; 862 break; 863 default: 864 file = "c320tunx.cod"; 865 break; 866 } 867 868 ret = request_firmware(&fw, file, dev); 869 if (ret) { 870 printk(KERN_ERR "MOXA: request_firmware failed. Make sure " 871 "you've placed '%s' file into your firmware " 872 "loader directory (e.g. /lib/firmware)\n", 873 file); 874 goto err_free; 875 } 876 877 ret = moxa_load_fw(brd, fw); 878 879 release_firmware(fw); 880 881 if (ret) 882 goto err_free; 883 884 spin_lock_bh(&moxa_lock); 885 brd->ready = 1; 886 if (!timer_pending(&moxaTimer)) 887 mod_timer(&moxaTimer, jiffies + HZ / 50); 888 spin_unlock_bh(&moxa_lock); 889 890 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD; 891 for (i = 0; i < brd->numPorts; i++) 892 tty_port_register_device(&brd->ports[i].port, moxaDriver, 893 first_idx + i, dev); 894 895 return 0; 896 err_free: 897 for (i = 0; i < MAX_PORTS_PER_BOARD; i++) 898 tty_port_destroy(&brd->ports[i].port); 899 kfree(brd->ports); 900 err: 901 return ret; 902 } 903 904 static void moxa_board_deinit(struct moxa_board_conf *brd) 905 { 906 unsigned int a, opened, first_idx; 907 908 mutex_lock(&moxa_openlock); 909 spin_lock_bh(&moxa_lock); 910 brd->ready = 0; 911 spin_unlock_bh(&moxa_lock); 912 913 /* pci hot-un-plug support */ 914 for (a = 0; a < brd->numPorts; a++) 915 if (tty_port_initialized(&brd->ports[a].port)) 916 tty_port_tty_hangup(&brd->ports[a].port, false); 917 918 for (a = 0; a < MAX_PORTS_PER_BOARD; a++) 919 tty_port_destroy(&brd->ports[a].port); 920 921 while (1) { 922 opened = 0; 923 for (a = 0; a < brd->numPorts; a++) 924 if (tty_port_initialized(&brd->ports[a].port)) 925 opened++; 926 mutex_unlock(&moxa_openlock); 927 if (!opened) 928 break; 929 msleep(50); 930 mutex_lock(&moxa_openlock); 931 } 932 933 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD; 934 for (a = 0; a < brd->numPorts; a++) 935 tty_unregister_device(moxaDriver, first_idx + a); 936 937 iounmap(brd->basemem); 938 brd->basemem = NULL; 939 kfree(brd->ports); 940 } 941 942 #ifdef CONFIG_PCI 943 static int moxa_pci_probe(struct pci_dev *pdev, 944 const struct pci_device_id *ent) 945 { 946 struct moxa_board_conf *board; 947 unsigned int i; 948 int board_type = ent->driver_data; 949 int retval; 950 951 retval = pci_enable_device(pdev); 952 if (retval) { 953 dev_err(&pdev->dev, "can't enable pci device\n"); 954 goto err; 955 } 956 957 for (i = 0; i < MAX_BOARDS; i++) 958 if (moxa_boards[i].basemem == NULL) 959 break; 960 961 retval = -ENODEV; 962 if (i >= MAX_BOARDS) { 963 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards " 964 "found. Board is ignored.\n", MAX_BOARDS); 965 goto err; 966 } 967 968 board = &moxa_boards[i]; 969 970 retval = pci_request_region(pdev, 2, "moxa-base"); 971 if (retval) { 972 dev_err(&pdev->dev, "can't request pci region 2\n"); 973 goto err; 974 } 975 976 board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000); 977 if (board->basemem == NULL) { 978 dev_err(&pdev->dev, "can't remap io space 2\n"); 979 retval = -ENOMEM; 980 goto err_reg; 981 } 982 983 board->boardType = board_type; 984 switch (board_type) { 985 case MOXA_BOARD_C218_ISA: 986 case MOXA_BOARD_C218_PCI: 987 board->numPorts = 8; 988 break; 989 990 case MOXA_BOARD_CP204J: 991 board->numPorts = 4; 992 break; 993 default: 994 board->numPorts = 0; 995 break; 996 } 997 board->busType = MOXA_BUS_TYPE_PCI; 998 999 retval = moxa_init_board(board, &pdev->dev); 1000 if (retval) 1001 goto err_base; 1002 1003 pci_set_drvdata(pdev, board); 1004 1005 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n", 1006 moxa_brdname[board_type - 1], board->numPorts); 1007 1008 return 0; 1009 err_base: 1010 iounmap(board->basemem); 1011 board->basemem = NULL; 1012 err_reg: 1013 pci_release_region(pdev, 2); 1014 err: 1015 return retval; 1016 } 1017 1018 static void moxa_pci_remove(struct pci_dev *pdev) 1019 { 1020 struct moxa_board_conf *brd = pci_get_drvdata(pdev); 1021 1022 moxa_board_deinit(brd); 1023 1024 pci_release_region(pdev, 2); 1025 } 1026 1027 static struct pci_driver moxa_pci_driver = { 1028 .name = "moxa", 1029 .id_table = moxa_pcibrds, 1030 .probe = moxa_pci_probe, 1031 .remove = moxa_pci_remove 1032 }; 1033 #endif /* CONFIG_PCI */ 1034 1035 static int __init moxa_init(void) 1036 { 1037 unsigned int isabrds = 0; 1038 int retval = 0; 1039 struct moxa_board_conf *brd = moxa_boards; 1040 unsigned int i; 1041 1042 printk(KERN_INFO "MOXA Intellio family driver version %s\n", 1043 MOXA_VERSION); 1044 1045 tty_port_init(&moxa_service_port); 1046 1047 moxaDriver = tty_alloc_driver(MAX_PORTS + 1, 1048 TTY_DRIVER_REAL_RAW | 1049 TTY_DRIVER_DYNAMIC_DEV); 1050 if (IS_ERR(moxaDriver)) 1051 return PTR_ERR(moxaDriver); 1052 1053 moxaDriver->name = "ttyMX"; 1054 moxaDriver->major = ttymajor; 1055 moxaDriver->minor_start = 0; 1056 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL; 1057 moxaDriver->subtype = SERIAL_TYPE_NORMAL; 1058 moxaDriver->init_termios = tty_std_termios; 1059 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; 1060 moxaDriver->init_termios.c_ispeed = 9600; 1061 moxaDriver->init_termios.c_ospeed = 9600; 1062 tty_set_operations(moxaDriver, &moxa_ops); 1063 /* Having one more port only for ioctls is ugly */ 1064 tty_port_link_device(&moxa_service_port, moxaDriver, MAX_PORTS); 1065 1066 if (tty_register_driver(moxaDriver)) { 1067 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n"); 1068 put_tty_driver(moxaDriver); 1069 return -1; 1070 } 1071 1072 /* Find the boards defined from module args. */ 1073 1074 for (i = 0; i < MAX_BOARDS; i++) { 1075 if (!baseaddr[i]) 1076 break; 1077 if (type[i] == MOXA_BOARD_C218_ISA || 1078 type[i] == MOXA_BOARD_C320_ISA) { 1079 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n", 1080 isabrds + 1, moxa_brdname[type[i] - 1], 1081 baseaddr[i]); 1082 brd->boardType = type[i]; 1083 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 : 1084 numports[i]; 1085 brd->busType = MOXA_BUS_TYPE_ISA; 1086 brd->basemem = ioremap_nocache(baseaddr[i], 0x4000); 1087 if (!brd->basemem) { 1088 printk(KERN_ERR "MOXA: can't remap %lx\n", 1089 baseaddr[i]); 1090 continue; 1091 } 1092 if (moxa_init_board(brd, NULL)) { 1093 iounmap(brd->basemem); 1094 brd->basemem = NULL; 1095 continue; 1096 } 1097 1098 printk(KERN_INFO "MOXA isa board found at 0x%.8lx and " 1099 "ready (%u ports, firmware loaded)\n", 1100 baseaddr[i], brd->numPorts); 1101 1102 brd++; 1103 isabrds++; 1104 } 1105 } 1106 1107 #ifdef CONFIG_PCI 1108 retval = pci_register_driver(&moxa_pci_driver); 1109 if (retval) { 1110 printk(KERN_ERR "Can't register MOXA pci driver!\n"); 1111 if (isabrds) 1112 retval = 0; 1113 } 1114 #endif 1115 1116 return retval; 1117 } 1118 1119 static void __exit moxa_exit(void) 1120 { 1121 unsigned int i; 1122 1123 #ifdef CONFIG_PCI 1124 pci_unregister_driver(&moxa_pci_driver); 1125 #endif 1126 1127 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */ 1128 if (moxa_boards[i].ready) 1129 moxa_board_deinit(&moxa_boards[i]); 1130 1131 del_timer_sync(&moxaTimer); 1132 1133 if (tty_unregister_driver(moxaDriver)) 1134 printk(KERN_ERR "Couldn't unregister MOXA Intellio family " 1135 "serial driver\n"); 1136 put_tty_driver(moxaDriver); 1137 } 1138 1139 module_init(moxa_init); 1140 module_exit(moxa_exit); 1141 1142 static void moxa_shutdown(struct tty_port *port) 1143 { 1144 struct moxa_port *ch = container_of(port, struct moxa_port, port); 1145 MoxaPortDisable(ch); 1146 MoxaPortFlushData(ch, 2); 1147 } 1148 1149 static int moxa_carrier_raised(struct tty_port *port) 1150 { 1151 struct moxa_port *ch = container_of(port, struct moxa_port, port); 1152 int dcd; 1153 1154 spin_lock_irq(&port->lock); 1155 dcd = ch->DCDState; 1156 spin_unlock_irq(&port->lock); 1157 return dcd; 1158 } 1159 1160 static void moxa_dtr_rts(struct tty_port *port, int onoff) 1161 { 1162 struct moxa_port *ch = container_of(port, struct moxa_port, port); 1163 MoxaPortLineCtrl(ch, onoff, onoff); 1164 } 1165 1166 1167 static int moxa_open(struct tty_struct *tty, struct file *filp) 1168 { 1169 struct moxa_board_conf *brd; 1170 struct moxa_port *ch; 1171 int port; 1172 1173 port = tty->index; 1174 if (port == MAX_PORTS) { 1175 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM; 1176 } 1177 if (mutex_lock_interruptible(&moxa_openlock)) 1178 return -ERESTARTSYS; 1179 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD]; 1180 if (!brd->ready) { 1181 mutex_unlock(&moxa_openlock); 1182 return -ENODEV; 1183 } 1184 1185 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) { 1186 mutex_unlock(&moxa_openlock); 1187 return -ENODEV; 1188 } 1189 1190 ch = &brd->ports[port % MAX_PORTS_PER_BOARD]; 1191 ch->port.count++; 1192 tty->driver_data = ch; 1193 tty_port_tty_set(&ch->port, tty); 1194 mutex_lock(&ch->port.mutex); 1195 if (!tty_port_initialized(&ch->port)) { 1196 ch->statusflags = 0; 1197 moxa_set_tty_param(tty, &tty->termios); 1198 MoxaPortLineCtrl(ch, 1, 1); 1199 MoxaPortEnable(ch); 1200 MoxaSetFifo(ch, ch->type == PORT_16550A); 1201 tty_port_set_initialized(&ch->port, 1); 1202 } 1203 mutex_unlock(&ch->port.mutex); 1204 mutex_unlock(&moxa_openlock); 1205 1206 return tty_port_block_til_ready(&ch->port, tty, filp); 1207 } 1208 1209 static void moxa_close(struct tty_struct *tty, struct file *filp) 1210 { 1211 struct moxa_port *ch = tty->driver_data; 1212 ch->cflag = tty->termios.c_cflag; 1213 tty_port_close(&ch->port, tty, filp); 1214 } 1215 1216 static int moxa_write(struct tty_struct *tty, 1217 const unsigned char *buf, int count) 1218 { 1219 struct moxa_port *ch = tty->driver_data; 1220 unsigned long flags; 1221 int len; 1222 1223 if (ch == NULL) 1224 return 0; 1225 1226 spin_lock_irqsave(&moxa_lock, flags); 1227 len = MoxaPortWriteData(tty, buf, count); 1228 spin_unlock_irqrestore(&moxa_lock, flags); 1229 1230 set_bit(LOWWAIT, &ch->statusflags); 1231 return len; 1232 } 1233 1234 static int moxa_write_room(struct tty_struct *tty) 1235 { 1236 struct moxa_port *ch; 1237 1238 if (tty->stopped) 1239 return 0; 1240 ch = tty->driver_data; 1241 if (ch == NULL) 1242 return 0; 1243 return MoxaPortTxFree(ch); 1244 } 1245 1246 static void moxa_flush_buffer(struct tty_struct *tty) 1247 { 1248 struct moxa_port *ch = tty->driver_data; 1249 1250 if (ch == NULL) 1251 return; 1252 MoxaPortFlushData(ch, 1); 1253 tty_wakeup(tty); 1254 } 1255 1256 static int moxa_chars_in_buffer(struct tty_struct *tty) 1257 { 1258 struct moxa_port *ch = tty->driver_data; 1259 int chars; 1260 1261 chars = MoxaPortTxQueue(ch); 1262 if (chars) 1263 /* 1264 * Make it possible to wakeup anything waiting for output 1265 * in tty_ioctl.c, etc. 1266 */ 1267 set_bit(EMPTYWAIT, &ch->statusflags); 1268 return chars; 1269 } 1270 1271 static int moxa_tiocmget(struct tty_struct *tty) 1272 { 1273 struct moxa_port *ch = tty->driver_data; 1274 int flag = 0, dtr, rts; 1275 1276 MoxaPortGetLineOut(ch, &dtr, &rts); 1277 if (dtr) 1278 flag |= TIOCM_DTR; 1279 if (rts) 1280 flag |= TIOCM_RTS; 1281 dtr = MoxaPortLineStatus(ch); 1282 if (dtr & 1) 1283 flag |= TIOCM_CTS; 1284 if (dtr & 2) 1285 flag |= TIOCM_DSR; 1286 if (dtr & 4) 1287 flag |= TIOCM_CD; 1288 return flag; 1289 } 1290 1291 static int moxa_tiocmset(struct tty_struct *tty, 1292 unsigned int set, unsigned int clear) 1293 { 1294 struct moxa_port *ch; 1295 int dtr, rts; 1296 1297 mutex_lock(&moxa_openlock); 1298 ch = tty->driver_data; 1299 if (!ch) { 1300 mutex_unlock(&moxa_openlock); 1301 return -EINVAL; 1302 } 1303 1304 MoxaPortGetLineOut(ch, &dtr, &rts); 1305 if (set & TIOCM_RTS) 1306 rts = 1; 1307 if (set & TIOCM_DTR) 1308 dtr = 1; 1309 if (clear & TIOCM_RTS) 1310 rts = 0; 1311 if (clear & TIOCM_DTR) 1312 dtr = 0; 1313 MoxaPortLineCtrl(ch, dtr, rts); 1314 mutex_unlock(&moxa_openlock); 1315 return 0; 1316 } 1317 1318 static void moxa_set_termios(struct tty_struct *tty, 1319 struct ktermios *old_termios) 1320 { 1321 struct moxa_port *ch = tty->driver_data; 1322 1323 if (ch == NULL) 1324 return; 1325 moxa_set_tty_param(tty, old_termios); 1326 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty)) 1327 wake_up_interruptible(&ch->port.open_wait); 1328 } 1329 1330 static void moxa_stop(struct tty_struct *tty) 1331 { 1332 struct moxa_port *ch = tty->driver_data; 1333 1334 if (ch == NULL) 1335 return; 1336 MoxaPortTxDisable(ch); 1337 set_bit(TXSTOPPED, &ch->statusflags); 1338 } 1339 1340 1341 static void moxa_start(struct tty_struct *tty) 1342 { 1343 struct moxa_port *ch = tty->driver_data; 1344 1345 if (ch == NULL) 1346 return; 1347 1348 if (!test_bit(TXSTOPPED, &ch->statusflags)) 1349 return; 1350 1351 MoxaPortTxEnable(ch); 1352 clear_bit(TXSTOPPED, &ch->statusflags); 1353 } 1354 1355 static void moxa_hangup(struct tty_struct *tty) 1356 { 1357 struct moxa_port *ch = tty->driver_data; 1358 tty_port_hangup(&ch->port); 1359 } 1360 1361 static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd) 1362 { 1363 unsigned long flags; 1364 dcd = !!dcd; 1365 1366 spin_lock_irqsave(&p->port.lock, flags); 1367 if (dcd != p->DCDState) { 1368 p->DCDState = dcd; 1369 spin_unlock_irqrestore(&p->port.lock, flags); 1370 if (!dcd) 1371 tty_port_tty_hangup(&p->port, true); 1372 } 1373 else 1374 spin_unlock_irqrestore(&p->port.lock, flags); 1375 } 1376 1377 static int moxa_poll_port(struct moxa_port *p, unsigned int handle, 1378 u16 __iomem *ip) 1379 { 1380 struct tty_struct *tty = tty_port_tty_get(&p->port); 1381 void __iomem *ofsAddr; 1382 unsigned int inited = tty_port_initialized(&p->port); 1383 u16 intr; 1384 1385 if (tty) { 1386 if (test_bit(EMPTYWAIT, &p->statusflags) && 1387 MoxaPortTxQueue(p) == 0) { 1388 clear_bit(EMPTYWAIT, &p->statusflags); 1389 tty_wakeup(tty); 1390 } 1391 if (test_bit(LOWWAIT, &p->statusflags) && !tty->stopped && 1392 MoxaPortTxQueue(p) <= WAKEUP_CHARS) { 1393 clear_bit(LOWWAIT, &p->statusflags); 1394 tty_wakeup(tty); 1395 } 1396 1397 if (inited && !tty_throttled(tty) && 1398 MoxaPortRxQueue(p) > 0) { /* RX */ 1399 MoxaPortReadData(p); 1400 tty_schedule_flip(&p->port); 1401 } 1402 } else { 1403 clear_bit(EMPTYWAIT, &p->statusflags); 1404 MoxaPortFlushData(p, 0); /* flush RX */ 1405 } 1406 1407 if (!handle) /* nothing else to do */ 1408 goto put; 1409 1410 intr = readw(ip); /* port irq status */ 1411 if (intr == 0) 1412 goto put; 1413 1414 writew(0, ip); /* ACK port */ 1415 ofsAddr = p->tableAddr; 1416 if (intr & IntrTx) /* disable tx intr */ 1417 writew(readw(ofsAddr + HostStat) & ~WakeupTx, 1418 ofsAddr + HostStat); 1419 1420 if (!inited) 1421 goto put; 1422 1423 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */ 1424 tty_insert_flip_char(&p->port, 0, TTY_BREAK); 1425 tty_schedule_flip(&p->port); 1426 } 1427 1428 if (intr & IntrLine) 1429 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state); 1430 put: 1431 tty_kref_put(tty); 1432 1433 return 0; 1434 } 1435 1436 static void moxa_poll(unsigned long ignored) 1437 { 1438 struct moxa_board_conf *brd; 1439 u16 __iomem *ip; 1440 unsigned int card, port, served = 0; 1441 1442 spin_lock(&moxa_lock); 1443 for (card = 0; card < MAX_BOARDS; card++) { 1444 brd = &moxa_boards[card]; 1445 if (!brd->ready) 1446 continue; 1447 1448 served++; 1449 1450 ip = NULL; 1451 if (readb(brd->intPend) == 0xff) 1452 ip = brd->intTable + readb(brd->intNdx); 1453 1454 for (port = 0; port < brd->numPorts; port++) 1455 moxa_poll_port(&brd->ports[port], !!ip, ip + port); 1456 1457 if (ip) 1458 writeb(0, brd->intPend); /* ACK */ 1459 1460 if (moxaLowWaterChk) { 1461 struct moxa_port *p = brd->ports; 1462 for (port = 0; port < brd->numPorts; port++, p++) 1463 if (p->lowChkFlag) { 1464 p->lowChkFlag = 0; 1465 moxa_low_water_check(p->tableAddr); 1466 } 1467 } 1468 } 1469 moxaLowWaterChk = 0; 1470 1471 if (served) 1472 mod_timer(&moxaTimer, jiffies + HZ / 50); 1473 spin_unlock(&moxa_lock); 1474 } 1475 1476 /******************************************************************************/ 1477 1478 static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios) 1479 { 1480 register struct ktermios *ts = &tty->termios; 1481 struct moxa_port *ch = tty->driver_data; 1482 int rts, cts, txflow, rxflow, xany, baud; 1483 1484 rts = cts = txflow = rxflow = xany = 0; 1485 if (ts->c_cflag & CRTSCTS) 1486 rts = cts = 1; 1487 if (ts->c_iflag & IXON) 1488 txflow = 1; 1489 if (ts->c_iflag & IXOFF) 1490 rxflow = 1; 1491 if (ts->c_iflag & IXANY) 1492 xany = 1; 1493 1494 /* Clear the features we don't support */ 1495 ts->c_cflag &= ~CMSPAR; 1496 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany); 1497 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty)); 1498 if (baud == -1) 1499 baud = tty_termios_baud_rate(old_termios); 1500 /* Not put the baud rate into the termios data */ 1501 tty_encode_baud_rate(tty, baud, baud); 1502 } 1503 1504 /***************************************************************************** 1505 * Driver level functions: * 1506 *****************************************************************************/ 1507 1508 static void MoxaPortFlushData(struct moxa_port *port, int mode) 1509 { 1510 void __iomem *ofsAddr; 1511 if (mode < 0 || mode > 2) 1512 return; 1513 ofsAddr = port->tableAddr; 1514 moxafunc(ofsAddr, FC_FlushQueue, mode); 1515 if (mode != 1) { 1516 port->lowChkFlag = 0; 1517 moxa_low_water_check(ofsAddr); 1518 } 1519 } 1520 1521 /* 1522 * Moxa Port Number Description: 1523 * 1524 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And, 1525 * the port number using in MOXA driver functions will be 0 to 31 for 1526 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96 1527 * to 127 for fourth. For example, if you setup three MOXA boards, 1528 * first board is C218, second board is C320-16 and third board is 1529 * C320-32. The port number of first board (C218 - 8 ports) is from 1530 * 0 to 7. The port number of second board (C320 - 16 ports) is form 1531 * 32 to 47. The port number of third board (C320 - 32 ports) is from 1532 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to 1533 * 127 will be invalid. 1534 * 1535 * 1536 * Moxa Functions Description: 1537 * 1538 * Function 1: Driver initialization routine, this routine must be 1539 * called when initialized driver. 1540 * Syntax: 1541 * void MoxaDriverInit(); 1542 * 1543 * 1544 * Function 2: Moxa driver private IOCTL command processing. 1545 * Syntax: 1546 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port); 1547 * 1548 * unsigned int cmd : IOCTL command 1549 * unsigned long arg : IOCTL argument 1550 * int port : port number (0 - 127) 1551 * 1552 * return: 0 (OK) 1553 * -EINVAL 1554 * -ENOIOCTLCMD 1555 * 1556 * 1557 * Function 6: Enable this port to start Tx/Rx data. 1558 * Syntax: 1559 * void MoxaPortEnable(int port); 1560 * int port : port number (0 - 127) 1561 * 1562 * 1563 * Function 7: Disable this port 1564 * Syntax: 1565 * void MoxaPortDisable(int port); 1566 * int port : port number (0 - 127) 1567 * 1568 * 1569 * Function 10: Setting baud rate of this port. 1570 * Syntax: 1571 * speed_t MoxaPortSetBaud(int port, speed_t baud); 1572 * int port : port number (0 - 127) 1573 * long baud : baud rate (50 - 115200) 1574 * 1575 * return: 0 : this port is invalid or baud < 50 1576 * 50 - 115200 : the real baud rate set to the port, if 1577 * the argument baud is large than maximun 1578 * available baud rate, the real setting 1579 * baud rate will be the maximun baud rate. 1580 * 1581 * 1582 * Function 12: Configure the port. 1583 * Syntax: 1584 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud); 1585 * int port : port number (0 - 127) 1586 * struct ktermios * termio : termio structure pointer 1587 * speed_t baud : baud rate 1588 * 1589 * return: -1 : this port is invalid or termio == NULL 1590 * 0 : setting O.K. 1591 * 1592 * 1593 * Function 13: Get the DTR/RTS state of this port. 1594 * Syntax: 1595 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); 1596 * int port : port number (0 - 127) 1597 * int * dtrState : pointer to INT to receive the current DTR 1598 * state. (if NULL, this function will not 1599 * write to this address) 1600 * int * rtsState : pointer to INT to receive the current RTS 1601 * state. (if NULL, this function will not 1602 * write to this address) 1603 * 1604 * return: -1 : this port is invalid 1605 * 0 : O.K. 1606 * 1607 * 1608 * Function 14: Setting the DTR/RTS output state of this port. 1609 * Syntax: 1610 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState); 1611 * int port : port number (0 - 127) 1612 * int dtrState : DTR output state (0: off, 1: on) 1613 * int rtsState : RTS output state (0: off, 1: on) 1614 * 1615 * 1616 * Function 15: Setting the flow control of this port. 1617 * Syntax: 1618 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow, 1619 * int txFlow,int xany); 1620 * int port : port number (0 - 127) 1621 * int rtsFlow : H/W RTS flow control (0: no, 1: yes) 1622 * int ctsFlow : H/W CTS flow control (0: no, 1: yes) 1623 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes) 1624 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes) 1625 * int xany : S/W XANY flow control (0: no, 1: yes) 1626 * 1627 * 1628 * Function 16: Get ths line status of this port 1629 * Syntax: 1630 * int MoxaPortLineStatus(int port); 1631 * int port : port number (0 - 127) 1632 * 1633 * return: Bit 0 - CTS state (0: off, 1: on) 1634 * Bit 1 - DSR state (0: off, 1: on) 1635 * Bit 2 - DCD state (0: off, 1: on) 1636 * 1637 * 1638 * Function 19: Flush the Rx/Tx buffer data of this port. 1639 * Syntax: 1640 * void MoxaPortFlushData(int port, int mode); 1641 * int port : port number (0 - 127) 1642 * int mode 1643 * 0 : flush the Rx buffer 1644 * 1 : flush the Tx buffer 1645 * 2 : flush the Rx and Tx buffer 1646 * 1647 * 1648 * Function 20: Write data. 1649 * Syntax: 1650 * int MoxaPortWriteData(int port, unsigned char * buffer, int length); 1651 * int port : port number (0 - 127) 1652 * unsigned char * buffer : pointer to write data buffer. 1653 * int length : write data length 1654 * 1655 * return: 0 - length : real write data length 1656 * 1657 * 1658 * Function 21: Read data. 1659 * Syntax: 1660 * int MoxaPortReadData(int port, struct tty_struct *tty); 1661 * int port : port number (0 - 127) 1662 * struct tty_struct *tty : tty for data 1663 * 1664 * return: 0 - length : real read data length 1665 * 1666 * 1667 * Function 24: Get the Tx buffer current queued data bytes 1668 * Syntax: 1669 * int MoxaPortTxQueue(int port); 1670 * int port : port number (0 - 127) 1671 * 1672 * return: .. : Tx buffer current queued data bytes 1673 * 1674 * 1675 * Function 25: Get the Tx buffer current free space 1676 * Syntax: 1677 * int MoxaPortTxFree(int port); 1678 * int port : port number (0 - 127) 1679 * 1680 * return: .. : Tx buffer current free space 1681 * 1682 * 1683 * Function 26: Get the Rx buffer current queued data bytes 1684 * Syntax: 1685 * int MoxaPortRxQueue(int port); 1686 * int port : port number (0 - 127) 1687 * 1688 * return: .. : Rx buffer current queued data bytes 1689 * 1690 * 1691 * Function 28: Disable port data transmission. 1692 * Syntax: 1693 * void MoxaPortTxDisable(int port); 1694 * int port : port number (0 - 127) 1695 * 1696 * 1697 * Function 29: Enable port data transmission. 1698 * Syntax: 1699 * void MoxaPortTxEnable(int port); 1700 * int port : port number (0 - 127) 1701 * 1702 * 1703 * Function 31: Get the received BREAK signal count and reset it. 1704 * Syntax: 1705 * int MoxaPortResetBrkCnt(int port); 1706 * int port : port number (0 - 127) 1707 * 1708 * return: 0 - .. : BREAK signal count 1709 * 1710 * 1711 */ 1712 1713 static void MoxaPortEnable(struct moxa_port *port) 1714 { 1715 void __iomem *ofsAddr; 1716 u16 lowwater = 512; 1717 1718 ofsAddr = port->tableAddr; 1719 writew(lowwater, ofsAddr + Low_water); 1720 if (MOXA_IS_320(port->board)) 1721 moxafunc(ofsAddr, FC_SetBreakIrq, 0); 1722 else 1723 writew(readw(ofsAddr + HostStat) | WakeupBreak, 1724 ofsAddr + HostStat); 1725 1726 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code); 1727 moxafunc(ofsAddr, FC_FlushQueue, 2); 1728 1729 moxafunc(ofsAddr, FC_EnableCH, Magic_code); 1730 MoxaPortLineStatus(port); 1731 } 1732 1733 static void MoxaPortDisable(struct moxa_port *port) 1734 { 1735 void __iomem *ofsAddr = port->tableAddr; 1736 1737 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */ 1738 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code); 1739 writew(0, ofsAddr + HostStat); 1740 moxafunc(ofsAddr, FC_DisableCH, Magic_code); 1741 } 1742 1743 static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud) 1744 { 1745 void __iomem *ofsAddr = port->tableAddr; 1746 unsigned int clock, val; 1747 speed_t max; 1748 1749 max = MOXA_IS_320(port->board) ? 460800 : 921600; 1750 if (baud < 50) 1751 return 0; 1752 if (baud > max) 1753 baud = max; 1754 clock = 921600; 1755 val = clock / baud; 1756 moxafunc(ofsAddr, FC_SetBaud, val); 1757 baud = clock / val; 1758 return baud; 1759 } 1760 1761 static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio, 1762 speed_t baud) 1763 { 1764 void __iomem *ofsAddr; 1765 tcflag_t mode = 0; 1766 1767 ofsAddr = port->tableAddr; 1768 1769 mode = termio->c_cflag & CSIZE; 1770 if (mode == CS5) 1771 mode = MX_CS5; 1772 else if (mode == CS6) 1773 mode = MX_CS6; 1774 else if (mode == CS7) 1775 mode = MX_CS7; 1776 else if (mode == CS8) 1777 mode = MX_CS8; 1778 1779 if (termio->c_cflag & CSTOPB) { 1780 if (mode == MX_CS5) 1781 mode |= MX_STOP15; 1782 else 1783 mode |= MX_STOP2; 1784 } else 1785 mode |= MX_STOP1; 1786 1787 if (termio->c_cflag & PARENB) { 1788 if (termio->c_cflag & PARODD) 1789 mode |= MX_PARODD; 1790 else 1791 mode |= MX_PAREVEN; 1792 } else 1793 mode |= MX_PARNONE; 1794 1795 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode); 1796 1797 if (MOXA_IS_320(port->board) && baud >= 921600) 1798 return -1; 1799 1800 baud = MoxaPortSetBaud(port, baud); 1801 1802 if (termio->c_iflag & (IXON | IXOFF | IXANY)) { 1803 spin_lock_irq(&moxafunc_lock); 1804 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg); 1805 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1); 1806 writeb(FC_SetXonXoff, ofsAddr + FuncCode); 1807 moxa_wait_finish(ofsAddr); 1808 spin_unlock_irq(&moxafunc_lock); 1809 1810 } 1811 return baud; 1812 } 1813 1814 static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState, 1815 int *rtsState) 1816 { 1817 if (dtrState) 1818 *dtrState = !!(port->lineCtrl & DTR_ON); 1819 if (rtsState) 1820 *rtsState = !!(port->lineCtrl & RTS_ON); 1821 1822 return 0; 1823 } 1824 1825 static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts) 1826 { 1827 u8 mode = 0; 1828 1829 if (dtr) 1830 mode |= DTR_ON; 1831 if (rts) 1832 mode |= RTS_ON; 1833 port->lineCtrl = mode; 1834 moxafunc(port->tableAddr, FC_LineControl, mode); 1835 } 1836 1837 static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts, 1838 int txflow, int rxflow, int txany) 1839 { 1840 int mode = 0; 1841 1842 if (rts) 1843 mode |= RTS_FlowCtl; 1844 if (cts) 1845 mode |= CTS_FlowCtl; 1846 if (txflow) 1847 mode |= Tx_FlowCtl; 1848 if (rxflow) 1849 mode |= Rx_FlowCtl; 1850 if (txany) 1851 mode |= IXM_IXANY; 1852 moxafunc(port->tableAddr, FC_SetFlowCtl, mode); 1853 } 1854 1855 static int MoxaPortLineStatus(struct moxa_port *port) 1856 { 1857 void __iomem *ofsAddr; 1858 int val; 1859 1860 ofsAddr = port->tableAddr; 1861 if (MOXA_IS_320(port->board)) 1862 val = moxafuncret(ofsAddr, FC_LineStatus, 0); 1863 else 1864 val = readw(ofsAddr + FlagStat) >> 4; 1865 val &= 0x0B; 1866 if (val & 8) 1867 val |= 4; 1868 moxa_new_dcdstate(port, val & 8); 1869 val &= 7; 1870 return val; 1871 } 1872 1873 static int MoxaPortWriteData(struct tty_struct *tty, 1874 const unsigned char *buffer, int len) 1875 { 1876 struct moxa_port *port = tty->driver_data; 1877 void __iomem *baseAddr, *ofsAddr, *ofs; 1878 unsigned int c, total; 1879 u16 head, tail, tx_mask, spage, epage; 1880 u16 pageno, pageofs, bufhead; 1881 1882 ofsAddr = port->tableAddr; 1883 baseAddr = port->board->basemem; 1884 tx_mask = readw(ofsAddr + TX_mask); 1885 spage = readw(ofsAddr + Page_txb); 1886 epage = readw(ofsAddr + EndPage_txb); 1887 tail = readw(ofsAddr + TXwptr); 1888 head = readw(ofsAddr + TXrptr); 1889 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask); 1890 if (c > len) 1891 c = len; 1892 moxaLog.txcnt[port->port.tty->index] += c; 1893 total = c; 1894 if (spage == epage) { 1895 bufhead = readw(ofsAddr + Ofs_txb); 1896 writew(spage, baseAddr + Control_reg); 1897 while (c > 0) { 1898 if (head > tail) 1899 len = head - tail - 1; 1900 else 1901 len = tx_mask + 1 - tail; 1902 len = (c > len) ? len : c; 1903 ofs = baseAddr + DynPage_addr + bufhead + tail; 1904 memcpy_toio(ofs, buffer, len); 1905 buffer += len; 1906 tail = (tail + len) & tx_mask; 1907 c -= len; 1908 } 1909 } else { 1910 pageno = spage + (tail >> 13); 1911 pageofs = tail & Page_mask; 1912 while (c > 0) { 1913 len = Page_size - pageofs; 1914 if (len > c) 1915 len = c; 1916 writeb(pageno, baseAddr + Control_reg); 1917 ofs = baseAddr + DynPage_addr + pageofs; 1918 memcpy_toio(ofs, buffer, len); 1919 buffer += len; 1920 if (++pageno == epage) 1921 pageno = spage; 1922 pageofs = 0; 1923 c -= len; 1924 } 1925 tail = (tail + total) & tx_mask; 1926 } 1927 writew(tail, ofsAddr + TXwptr); 1928 writeb(1, ofsAddr + CD180TXirq); /* start to send */ 1929 return total; 1930 } 1931 1932 static int MoxaPortReadData(struct moxa_port *port) 1933 { 1934 struct tty_struct *tty = port->port.tty; 1935 unsigned char *dst; 1936 void __iomem *baseAddr, *ofsAddr, *ofs; 1937 unsigned int count, len, total; 1938 u16 tail, rx_mask, spage, epage; 1939 u16 pageno, pageofs, bufhead, head; 1940 1941 ofsAddr = port->tableAddr; 1942 baseAddr = port->board->basemem; 1943 head = readw(ofsAddr + RXrptr); 1944 tail = readw(ofsAddr + RXwptr); 1945 rx_mask = readw(ofsAddr + RX_mask); 1946 spage = readw(ofsAddr + Page_rxb); 1947 epage = readw(ofsAddr + EndPage_rxb); 1948 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1); 1949 if (count == 0) 1950 return 0; 1951 1952 total = count; 1953 moxaLog.rxcnt[tty->index] += total; 1954 if (spage == epage) { 1955 bufhead = readw(ofsAddr + Ofs_rxb); 1956 writew(spage, baseAddr + Control_reg); 1957 while (count > 0) { 1958 ofs = baseAddr + DynPage_addr + bufhead + head; 1959 len = (tail >= head) ? (tail - head) : 1960 (rx_mask + 1 - head); 1961 len = tty_prepare_flip_string(&port->port, &dst, 1962 min(len, count)); 1963 memcpy_fromio(dst, ofs, len); 1964 head = (head + len) & rx_mask; 1965 count -= len; 1966 } 1967 } else { 1968 pageno = spage + (head >> 13); 1969 pageofs = head & Page_mask; 1970 while (count > 0) { 1971 writew(pageno, baseAddr + Control_reg); 1972 ofs = baseAddr + DynPage_addr + pageofs; 1973 len = tty_prepare_flip_string(&port->port, &dst, 1974 min(Page_size - pageofs, count)); 1975 memcpy_fromio(dst, ofs, len); 1976 1977 count -= len; 1978 pageofs = (pageofs + len) & Page_mask; 1979 if (pageofs == 0 && ++pageno == epage) 1980 pageno = spage; 1981 } 1982 head = (head + total) & rx_mask; 1983 } 1984 writew(head, ofsAddr + RXrptr); 1985 if (readb(ofsAddr + FlagStat) & Xoff_state) { 1986 moxaLowWaterChk = 1; 1987 port->lowChkFlag = 1; 1988 } 1989 return total; 1990 } 1991 1992 1993 static int MoxaPortTxQueue(struct moxa_port *port) 1994 { 1995 void __iomem *ofsAddr = port->tableAddr; 1996 u16 rptr, wptr, mask; 1997 1998 rptr = readw(ofsAddr + TXrptr); 1999 wptr = readw(ofsAddr + TXwptr); 2000 mask = readw(ofsAddr + TX_mask); 2001 return (wptr - rptr) & mask; 2002 } 2003 2004 static int MoxaPortTxFree(struct moxa_port *port) 2005 { 2006 void __iomem *ofsAddr = port->tableAddr; 2007 u16 rptr, wptr, mask; 2008 2009 rptr = readw(ofsAddr + TXrptr); 2010 wptr = readw(ofsAddr + TXwptr); 2011 mask = readw(ofsAddr + TX_mask); 2012 return mask - ((wptr - rptr) & mask); 2013 } 2014 2015 static int MoxaPortRxQueue(struct moxa_port *port) 2016 { 2017 void __iomem *ofsAddr = port->tableAddr; 2018 u16 rptr, wptr, mask; 2019 2020 rptr = readw(ofsAddr + RXrptr); 2021 wptr = readw(ofsAddr + RXwptr); 2022 mask = readw(ofsAddr + RX_mask); 2023 return (wptr - rptr) & mask; 2024 } 2025 2026 static void MoxaPortTxDisable(struct moxa_port *port) 2027 { 2028 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code); 2029 } 2030 2031 static void MoxaPortTxEnable(struct moxa_port *port) 2032 { 2033 moxafunc(port->tableAddr, FC_SetXonState, Magic_code); 2034 } 2035 2036 static int moxa_get_serial_info(struct moxa_port *info, 2037 struct serial_struct __user *retinfo) 2038 { 2039 struct serial_struct tmp = { 2040 .type = info->type, 2041 .line = info->port.tty->index, 2042 .flags = info->port.flags, 2043 .baud_base = 921600, 2044 .close_delay = info->port.close_delay 2045 }; 2046 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0; 2047 } 2048 2049 2050 static int moxa_set_serial_info(struct moxa_port *info, 2051 struct serial_struct __user *new_info) 2052 { 2053 struct serial_struct new_serial; 2054 2055 if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) 2056 return -EFAULT; 2057 2058 if (new_serial.irq != 0 || new_serial.port != 0 || 2059 new_serial.custom_divisor != 0 || 2060 new_serial.baud_base != 921600) 2061 return -EPERM; 2062 2063 if (!capable(CAP_SYS_ADMIN)) { 2064 if (((new_serial.flags & ~ASYNC_USR_MASK) != 2065 (info->port.flags & ~ASYNC_USR_MASK))) 2066 return -EPERM; 2067 } else 2068 info->port.close_delay = new_serial.close_delay * HZ / 100; 2069 2070 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS); 2071 new_serial.flags |= (info->port.flags & ASYNC_FLAGS); 2072 2073 MoxaSetFifo(info, new_serial.type == PORT_16550A); 2074 2075 info->type = new_serial.type; 2076 return 0; 2077 } 2078 2079 2080 2081 /***************************************************************************** 2082 * Static local functions: * 2083 *****************************************************************************/ 2084 2085 static void MoxaSetFifo(struct moxa_port *port, int enable) 2086 { 2087 void __iomem *ofsAddr = port->tableAddr; 2088 2089 if (!enable) { 2090 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0); 2091 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1); 2092 } else { 2093 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3); 2094 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16); 2095 } 2096 } 2097