1 // SPDX-License-Identifier: GPL-2.0+ 2 /*****************************************************************************/ 3 /* 4 * moxa.c -- MOXA Intellio family multiport serial driver. 5 * 6 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com). 7 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com> 8 * 9 * This code is loosely based on the Linux serial driver, written by 10 * Linus Torvalds, Theodore T'so and others. 11 */ 12 13 /* 14 * MOXA Intellio Series Driver 15 * for : LINUX 16 * date : 1999/1/7 17 * version : 5.1 18 */ 19 20 #include <linux/module.h> 21 #include <linux/types.h> 22 #include <linux/mm.h> 23 #include <linux/ioport.h> 24 #include <linux/errno.h> 25 #include <linux/firmware.h> 26 #include <linux/signal.h> 27 #include <linux/sched.h> 28 #include <linux/timer.h> 29 #include <linux/interrupt.h> 30 #include <linux/tty.h> 31 #include <linux/tty_flip.h> 32 #include <linux/major.h> 33 #include <linux/string.h> 34 #include <linux/fcntl.h> 35 #include <linux/ptrace.h> 36 #include <linux/serial.h> 37 #include <linux/tty_driver.h> 38 #include <linux/delay.h> 39 #include <linux/pci.h> 40 #include <linux/init.h> 41 #include <linux/bitops.h> 42 #include <linux/slab.h> 43 #include <linux/ratelimit.h> 44 45 #include <asm/io.h> 46 #include <linux/uaccess.h> 47 48 #include "moxa.h" 49 50 #define MOXA_VERSION "6.0k" 51 52 #define MOXA_FW_HDRLEN 32 53 54 #define MOXAMAJOR 172 55 56 #define MAX_BOARDS 4 /* Don't change this value */ 57 #define MAX_PORTS_PER_BOARD 32 /* Don't change this value */ 58 #define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD) 59 60 #define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \ 61 (brd)->boardType == MOXA_BOARD_C320_PCI) 62 63 /* 64 * Define the Moxa PCI vendor and device IDs. 65 */ 66 #define MOXA_BUS_TYPE_ISA 0 67 #define MOXA_BUS_TYPE_PCI 1 68 69 enum { 70 MOXA_BOARD_C218_PCI = 1, 71 MOXA_BOARD_C218_ISA, 72 MOXA_BOARD_C320_PCI, 73 MOXA_BOARD_C320_ISA, 74 MOXA_BOARD_CP204J, 75 }; 76 77 static char *moxa_brdname[] = 78 { 79 "C218 Turbo PCI series", 80 "C218 Turbo ISA series", 81 "C320 Turbo PCI series", 82 "C320 Turbo ISA series", 83 "CP-204J series", 84 }; 85 86 #ifdef CONFIG_PCI 87 static const struct pci_device_id moxa_pcibrds[] = { 88 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218), 89 .driver_data = MOXA_BOARD_C218_PCI }, 90 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320), 91 .driver_data = MOXA_BOARD_C320_PCI }, 92 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J), 93 .driver_data = MOXA_BOARD_CP204J }, 94 { 0 } 95 }; 96 MODULE_DEVICE_TABLE(pci, moxa_pcibrds); 97 #endif /* CONFIG_PCI */ 98 99 struct moxa_port; 100 101 static struct moxa_board_conf { 102 int boardType; 103 int numPorts; 104 int busType; 105 106 unsigned int ready; 107 108 struct moxa_port *ports; 109 110 void __iomem *basemem; 111 void __iomem *intNdx; 112 void __iomem *intPend; 113 void __iomem *intTable; 114 } moxa_boards[MAX_BOARDS]; 115 116 struct mxser_mstatus { 117 tcflag_t cflag; 118 int cts; 119 int dsr; 120 int ri; 121 int dcd; 122 }; 123 124 struct moxaq_str { 125 int inq; 126 int outq; 127 }; 128 129 struct moxa_port { 130 struct tty_port port; 131 struct moxa_board_conf *board; 132 void __iomem *tableAddr; 133 134 int type; 135 int cflag; 136 unsigned long statusflags; 137 138 u8 DCDState; /* Protected by the port lock */ 139 u8 lineCtrl; 140 u8 lowChkFlag; 141 }; 142 143 struct mon_str { 144 int tick; 145 int rxcnt[MAX_PORTS]; 146 int txcnt[MAX_PORTS]; 147 }; 148 149 /* statusflags */ 150 #define TXSTOPPED 1 151 #define LOWWAIT 2 152 #define EMPTYWAIT 3 153 154 155 #define WAKEUP_CHARS 256 156 157 static int ttymajor = MOXAMAJOR; 158 static struct mon_str moxaLog; 159 static unsigned int moxaFuncTout = HZ / 2; 160 static unsigned int moxaLowWaterChk; 161 static DEFINE_MUTEX(moxa_openlock); 162 static DEFINE_SPINLOCK(moxa_lock); 163 164 static unsigned long baseaddr[MAX_BOARDS]; 165 static unsigned int type[MAX_BOARDS]; 166 static unsigned int numports[MAX_BOARDS]; 167 static struct tty_port moxa_service_port; 168 169 MODULE_AUTHOR("William Chen"); 170 MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver"); 171 MODULE_LICENSE("GPL"); 172 MODULE_FIRMWARE("c218tunx.cod"); 173 MODULE_FIRMWARE("cp204unx.cod"); 174 MODULE_FIRMWARE("c320tunx.cod"); 175 176 module_param_array(type, uint, NULL, 0); 177 MODULE_PARM_DESC(type, "card type: C218=2, C320=4"); 178 module_param_hw_array(baseaddr, ulong, ioport, NULL, 0); 179 MODULE_PARM_DESC(baseaddr, "base address"); 180 module_param_array(numports, uint, NULL, 0); 181 MODULE_PARM_DESC(numports, "numports (ignored for C218)"); 182 183 module_param(ttymajor, int, 0); 184 185 /* 186 * static functions: 187 */ 188 static int moxa_open(struct tty_struct *, struct file *); 189 static void moxa_close(struct tty_struct *, struct file *); 190 static int moxa_write(struct tty_struct *, const unsigned char *, int); 191 static int moxa_write_room(struct tty_struct *); 192 static void moxa_flush_buffer(struct tty_struct *); 193 static int moxa_chars_in_buffer(struct tty_struct *); 194 static void moxa_set_termios(struct tty_struct *, struct ktermios *); 195 static void moxa_stop(struct tty_struct *); 196 static void moxa_start(struct tty_struct *); 197 static void moxa_hangup(struct tty_struct *); 198 static int moxa_tiocmget(struct tty_struct *tty); 199 static int moxa_tiocmset(struct tty_struct *tty, 200 unsigned int set, unsigned int clear); 201 static void moxa_poll(struct timer_list *); 202 static void moxa_set_tty_param(struct tty_struct *, struct ktermios *); 203 static void moxa_shutdown(struct tty_port *); 204 static int moxa_carrier_raised(struct tty_port *); 205 static void moxa_dtr_rts(struct tty_port *, int); 206 /* 207 * moxa board interface functions: 208 */ 209 static void MoxaPortEnable(struct moxa_port *); 210 static void MoxaPortDisable(struct moxa_port *); 211 static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t); 212 static int MoxaPortGetLineOut(struct moxa_port *, int *, int *); 213 static void MoxaPortLineCtrl(struct moxa_port *, int, int); 214 static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int); 215 static int MoxaPortLineStatus(struct moxa_port *); 216 static void MoxaPortFlushData(struct moxa_port *, int); 217 static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int); 218 static int MoxaPortReadData(struct moxa_port *); 219 static int MoxaPortTxQueue(struct moxa_port *); 220 static int MoxaPortRxQueue(struct moxa_port *); 221 static int MoxaPortTxFree(struct moxa_port *); 222 static void MoxaPortTxDisable(struct moxa_port *); 223 static void MoxaPortTxEnable(struct moxa_port *); 224 static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *); 225 static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *); 226 static void MoxaSetFifo(struct moxa_port *port, int enable); 227 228 /* 229 * I/O functions 230 */ 231 232 static DEFINE_SPINLOCK(moxafunc_lock); 233 234 static void moxa_wait_finish(void __iomem *ofsAddr) 235 { 236 unsigned long end = jiffies + moxaFuncTout; 237 238 while (readw(ofsAddr + FuncCode) != 0) 239 if (time_after(jiffies, end)) 240 return; 241 if (readw(ofsAddr + FuncCode) != 0) 242 printk_ratelimited(KERN_WARNING "moxa function expired\n"); 243 } 244 245 static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg) 246 { 247 unsigned long flags; 248 spin_lock_irqsave(&moxafunc_lock, flags); 249 writew(arg, ofsAddr + FuncArg); 250 writew(cmd, ofsAddr + FuncCode); 251 moxa_wait_finish(ofsAddr); 252 spin_unlock_irqrestore(&moxafunc_lock, flags); 253 } 254 255 static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg) 256 { 257 unsigned long flags; 258 u16 ret; 259 spin_lock_irqsave(&moxafunc_lock, flags); 260 writew(arg, ofsAddr + FuncArg); 261 writew(cmd, ofsAddr + FuncCode); 262 moxa_wait_finish(ofsAddr); 263 ret = readw(ofsAddr + FuncArg); 264 spin_unlock_irqrestore(&moxafunc_lock, flags); 265 return ret; 266 } 267 268 static void moxa_low_water_check(void __iomem *ofsAddr) 269 { 270 u16 rptr, wptr, mask, len; 271 272 if (readb(ofsAddr + FlagStat) & Xoff_state) { 273 rptr = readw(ofsAddr + RXrptr); 274 wptr = readw(ofsAddr + RXwptr); 275 mask = readw(ofsAddr + RX_mask); 276 len = (wptr - rptr) & mask; 277 if (len <= Low_water) 278 moxafunc(ofsAddr, FC_SendXon, 0); 279 } 280 } 281 282 /* 283 * TTY operations 284 */ 285 286 static int moxa_ioctl(struct tty_struct *tty, 287 unsigned int cmd, unsigned long arg) 288 { 289 struct moxa_port *ch = tty->driver_data; 290 void __user *argp = (void __user *)arg; 291 int status, ret = 0; 292 293 if (tty->index == MAX_PORTS) { 294 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE && 295 cmd != MOXA_GETMSTATUS) 296 return -EINVAL; 297 } else if (!ch) 298 return -ENODEV; 299 300 switch (cmd) { 301 case MOXA_GETDATACOUNT: 302 moxaLog.tick = jiffies; 303 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog))) 304 ret = -EFAULT; 305 break; 306 case MOXA_FLUSH_QUEUE: 307 MoxaPortFlushData(ch, arg); 308 break; 309 case MOXA_GET_IOQUEUE: { 310 struct moxaq_str __user *argm = argp; 311 struct moxaq_str tmp; 312 struct moxa_port *p; 313 unsigned int i, j; 314 315 for (i = 0; i < MAX_BOARDS; i++) { 316 p = moxa_boards[i].ports; 317 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) { 318 memset(&tmp, 0, sizeof(tmp)); 319 spin_lock_bh(&moxa_lock); 320 if (moxa_boards[i].ready) { 321 tmp.inq = MoxaPortRxQueue(p); 322 tmp.outq = MoxaPortTxQueue(p); 323 } 324 spin_unlock_bh(&moxa_lock); 325 if (copy_to_user(argm, &tmp, sizeof(tmp))) 326 return -EFAULT; 327 } 328 } 329 break; 330 } case MOXA_GET_OQUEUE: 331 status = MoxaPortTxQueue(ch); 332 ret = put_user(status, (unsigned long __user *)argp); 333 break; 334 case MOXA_GET_IQUEUE: 335 status = MoxaPortRxQueue(ch); 336 ret = put_user(status, (unsigned long __user *)argp); 337 break; 338 case MOXA_GETMSTATUS: { 339 struct mxser_mstatus __user *argm = argp; 340 struct mxser_mstatus tmp; 341 struct moxa_port *p; 342 unsigned int i, j; 343 344 for (i = 0; i < MAX_BOARDS; i++) { 345 p = moxa_boards[i].ports; 346 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) { 347 struct tty_struct *ttyp; 348 memset(&tmp, 0, sizeof(tmp)); 349 spin_lock_bh(&moxa_lock); 350 if (!moxa_boards[i].ready) { 351 spin_unlock_bh(&moxa_lock); 352 goto copy; 353 } 354 355 status = MoxaPortLineStatus(p); 356 spin_unlock_bh(&moxa_lock); 357 358 if (status & 1) 359 tmp.cts = 1; 360 if (status & 2) 361 tmp.dsr = 1; 362 if (status & 4) 363 tmp.dcd = 1; 364 365 ttyp = tty_port_tty_get(&p->port); 366 if (!ttyp) 367 tmp.cflag = p->cflag; 368 else 369 tmp.cflag = ttyp->termios.c_cflag; 370 tty_kref_put(ttyp); 371 copy: 372 if (copy_to_user(argm, &tmp, sizeof(tmp))) 373 return -EFAULT; 374 } 375 } 376 break; 377 } 378 case TIOCGSERIAL: 379 mutex_lock(&ch->port.mutex); 380 ret = moxa_get_serial_info(ch, argp); 381 mutex_unlock(&ch->port.mutex); 382 break; 383 case TIOCSSERIAL: 384 mutex_lock(&ch->port.mutex); 385 ret = moxa_set_serial_info(ch, argp); 386 mutex_unlock(&ch->port.mutex); 387 break; 388 default: 389 ret = -ENOIOCTLCMD; 390 } 391 return ret; 392 } 393 394 static int moxa_break_ctl(struct tty_struct *tty, int state) 395 { 396 struct moxa_port *port = tty->driver_data; 397 398 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak, 399 Magic_code); 400 return 0; 401 } 402 403 static const struct tty_operations moxa_ops = { 404 .open = moxa_open, 405 .close = moxa_close, 406 .write = moxa_write, 407 .write_room = moxa_write_room, 408 .flush_buffer = moxa_flush_buffer, 409 .chars_in_buffer = moxa_chars_in_buffer, 410 .ioctl = moxa_ioctl, 411 .set_termios = moxa_set_termios, 412 .stop = moxa_stop, 413 .start = moxa_start, 414 .hangup = moxa_hangup, 415 .break_ctl = moxa_break_ctl, 416 .tiocmget = moxa_tiocmget, 417 .tiocmset = moxa_tiocmset, 418 }; 419 420 static const struct tty_port_operations moxa_port_ops = { 421 .carrier_raised = moxa_carrier_raised, 422 .dtr_rts = moxa_dtr_rts, 423 .shutdown = moxa_shutdown, 424 }; 425 426 static struct tty_driver *moxaDriver; 427 static DEFINE_TIMER(moxaTimer, moxa_poll); 428 429 /* 430 * HW init 431 */ 432 433 static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model) 434 { 435 switch (brd->boardType) { 436 case MOXA_BOARD_C218_ISA: 437 case MOXA_BOARD_C218_PCI: 438 if (model != 1) 439 goto err; 440 break; 441 case MOXA_BOARD_CP204J: 442 if (model != 3) 443 goto err; 444 break; 445 default: 446 if (model != 2) 447 goto err; 448 break; 449 } 450 return 0; 451 err: 452 return -EINVAL; 453 } 454 455 static int moxa_check_fw(const void *ptr) 456 { 457 const __le16 *lptr = ptr; 458 459 if (*lptr != cpu_to_le16(0x7980)) 460 return -EINVAL; 461 462 return 0; 463 } 464 465 static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf, 466 size_t len) 467 { 468 void __iomem *baseAddr = brd->basemem; 469 u16 tmp; 470 471 writeb(HW_reset, baseAddr + Control_reg); /* reset */ 472 msleep(10); 473 memset_io(baseAddr, 0, 4096); 474 memcpy_toio(baseAddr, buf, len); /* download BIOS */ 475 writeb(0, baseAddr + Control_reg); /* restart */ 476 477 msleep(2000); 478 479 switch (brd->boardType) { 480 case MOXA_BOARD_C218_ISA: 481 case MOXA_BOARD_C218_PCI: 482 tmp = readw(baseAddr + C218_key); 483 if (tmp != C218_KeyCode) 484 goto err; 485 break; 486 case MOXA_BOARD_CP204J: 487 tmp = readw(baseAddr + C218_key); 488 if (tmp != CP204J_KeyCode) 489 goto err; 490 break; 491 default: 492 tmp = readw(baseAddr + C320_key); 493 if (tmp != C320_KeyCode) 494 goto err; 495 tmp = readw(baseAddr + C320_status); 496 if (tmp != STS_init) { 497 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic " 498 "module not found\n"); 499 return -EIO; 500 } 501 break; 502 } 503 504 return 0; 505 err: 506 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n"); 507 return -EIO; 508 } 509 510 static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr, 511 size_t len) 512 { 513 void __iomem *baseAddr = brd->basemem; 514 515 if (len < 7168) { 516 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n"); 517 return -EINVAL; 518 } 519 520 writew(len - 7168 - 2, baseAddr + C320bapi_len); 521 writeb(1, baseAddr + Control_reg); /* Select Page 1 */ 522 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168); 523 writeb(2, baseAddr + Control_reg); /* Select Page 2 */ 524 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168); 525 526 return 0; 527 } 528 529 static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr, 530 size_t len) 531 { 532 void __iomem *baseAddr = brd->basemem; 533 const __le16 *uptr = ptr; 534 size_t wlen, len2, j; 535 unsigned long key, loadbuf, loadlen, checksum, checksum_ok; 536 unsigned int i, retry; 537 u16 usum, keycode; 538 539 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode : 540 C218_KeyCode; 541 542 switch (brd->boardType) { 543 case MOXA_BOARD_CP204J: 544 case MOXA_BOARD_C218_ISA: 545 case MOXA_BOARD_C218_PCI: 546 key = C218_key; 547 loadbuf = C218_LoadBuf; 548 loadlen = C218DLoad_len; 549 checksum = C218check_sum; 550 checksum_ok = C218chksum_ok; 551 break; 552 default: 553 key = C320_key; 554 keycode = C320_KeyCode; 555 loadbuf = C320_LoadBuf; 556 loadlen = C320DLoad_len; 557 checksum = C320check_sum; 558 checksum_ok = C320chksum_ok; 559 break; 560 } 561 562 usum = 0; 563 wlen = len >> 1; 564 for (i = 0; i < wlen; i++) 565 usum += le16_to_cpu(uptr[i]); 566 retry = 0; 567 do { 568 wlen = len >> 1; 569 j = 0; 570 while (wlen) { 571 len2 = (wlen > 2048) ? 2048 : wlen; 572 wlen -= len2; 573 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1); 574 j += len2 << 1; 575 576 writew(len2, baseAddr + loadlen); 577 writew(0, baseAddr + key); 578 for (i = 0; i < 100; i++) { 579 if (readw(baseAddr + key) == keycode) 580 break; 581 msleep(10); 582 } 583 if (readw(baseAddr + key) != keycode) 584 return -EIO; 585 } 586 writew(0, baseAddr + loadlen); 587 writew(usum, baseAddr + checksum); 588 writew(0, baseAddr + key); 589 for (i = 0; i < 100; i++) { 590 if (readw(baseAddr + key) == keycode) 591 break; 592 msleep(10); 593 } 594 retry++; 595 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3)); 596 if (readb(baseAddr + checksum_ok) != 1) 597 return -EIO; 598 599 writew(0, baseAddr + key); 600 for (i = 0; i < 600; i++) { 601 if (readw(baseAddr + Magic_no) == Magic_code) 602 break; 603 msleep(10); 604 } 605 if (readw(baseAddr + Magic_no) != Magic_code) 606 return -EIO; 607 608 if (MOXA_IS_320(brd)) { 609 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */ 610 writew(0x3800, baseAddr + TMS320_PORT1); 611 writew(0x3900, baseAddr + TMS320_PORT2); 612 writew(28499, baseAddr + TMS320_CLOCK); 613 } else { 614 writew(0x3200, baseAddr + TMS320_PORT1); 615 writew(0x3400, baseAddr + TMS320_PORT2); 616 writew(19999, baseAddr + TMS320_CLOCK); 617 } 618 } 619 writew(1, baseAddr + Disable_IRQ); 620 writew(0, baseAddr + Magic_no); 621 for (i = 0; i < 500; i++) { 622 if (readw(baseAddr + Magic_no) == Magic_code) 623 break; 624 msleep(10); 625 } 626 if (readw(baseAddr + Magic_no) != Magic_code) 627 return -EIO; 628 629 if (MOXA_IS_320(brd)) { 630 j = readw(baseAddr + Module_cnt); 631 if (j <= 0) 632 return -EIO; 633 brd->numPorts = j * 8; 634 writew(j, baseAddr + Module_no); 635 writew(0, baseAddr + Magic_no); 636 for (i = 0; i < 600; i++) { 637 if (readw(baseAddr + Magic_no) == Magic_code) 638 break; 639 msleep(10); 640 } 641 if (readw(baseAddr + Magic_no) != Magic_code) 642 return -EIO; 643 } 644 brd->intNdx = baseAddr + IRQindex; 645 brd->intPend = baseAddr + IRQpending; 646 brd->intTable = baseAddr + IRQtable; 647 648 return 0; 649 } 650 651 static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr, 652 size_t len) 653 { 654 void __iomem *ofsAddr, *baseAddr = brd->basemem; 655 struct moxa_port *port; 656 int retval, i; 657 658 if (len % 2) { 659 printk(KERN_ERR "MOXA: bios length is not even\n"); 660 return -EINVAL; 661 } 662 663 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */ 664 if (retval) 665 return retval; 666 667 switch (brd->boardType) { 668 case MOXA_BOARD_C218_ISA: 669 case MOXA_BOARD_C218_PCI: 670 case MOXA_BOARD_CP204J: 671 port = brd->ports; 672 for (i = 0; i < brd->numPorts; i++, port++) { 673 port->board = brd; 674 port->DCDState = 0; 675 port->tableAddr = baseAddr + Extern_table + 676 Extern_size * i; 677 ofsAddr = port->tableAddr; 678 writew(C218rx_mask, ofsAddr + RX_mask); 679 writew(C218tx_mask, ofsAddr + TX_mask); 680 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb); 681 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb); 682 683 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb); 684 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb); 685 686 } 687 break; 688 default: 689 port = brd->ports; 690 for (i = 0; i < brd->numPorts; i++, port++) { 691 port->board = brd; 692 port->DCDState = 0; 693 port->tableAddr = baseAddr + Extern_table + 694 Extern_size * i; 695 ofsAddr = port->tableAddr; 696 switch (brd->numPorts) { 697 case 8: 698 writew(C320p8rx_mask, ofsAddr + RX_mask); 699 writew(C320p8tx_mask, ofsAddr + TX_mask); 700 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb); 701 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb); 702 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb); 703 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb); 704 705 break; 706 case 16: 707 writew(C320p16rx_mask, ofsAddr + RX_mask); 708 writew(C320p16tx_mask, ofsAddr + TX_mask); 709 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb); 710 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb); 711 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb); 712 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb); 713 break; 714 715 case 24: 716 writew(C320p24rx_mask, ofsAddr + RX_mask); 717 writew(C320p24tx_mask, ofsAddr + TX_mask); 718 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb); 719 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb); 720 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb); 721 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb); 722 break; 723 case 32: 724 writew(C320p32rx_mask, ofsAddr + RX_mask); 725 writew(C320p32tx_mask, ofsAddr + TX_mask); 726 writew(C320p32tx_ofs, ofsAddr + Ofs_txb); 727 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb); 728 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb); 729 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb); 730 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb); 731 break; 732 } 733 } 734 break; 735 } 736 return 0; 737 } 738 739 static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw) 740 { 741 const void *ptr = fw->data; 742 char rsn[64]; 743 u16 lens[5]; 744 size_t len; 745 unsigned int a, lenp, lencnt; 746 int ret = -EINVAL; 747 struct { 748 __le32 magic; /* 0x34303430 */ 749 u8 reserved1[2]; 750 u8 type; /* UNIX = 3 */ 751 u8 model; /* C218T=1, C320T=2, CP204=3 */ 752 u8 reserved2[8]; 753 __le16 len[5]; 754 } const *hdr = ptr; 755 756 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens)); 757 758 if (fw->size < MOXA_FW_HDRLEN) { 759 strcpy(rsn, "too short (even header won't fit)"); 760 goto err; 761 } 762 if (hdr->magic != cpu_to_le32(0x30343034)) { 763 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic)); 764 goto err; 765 } 766 if (hdr->type != 3) { 767 sprintf(rsn, "not for linux, type is %u", hdr->type); 768 goto err; 769 } 770 if (moxa_check_fw_model(brd, hdr->model)) { 771 sprintf(rsn, "not for this card, model is %u", hdr->model); 772 goto err; 773 } 774 775 len = MOXA_FW_HDRLEN; 776 lencnt = hdr->model == 2 ? 5 : 3; 777 for (a = 0; a < ARRAY_SIZE(lens); a++) { 778 lens[a] = le16_to_cpu(hdr->len[a]); 779 if (lens[a] && len + lens[a] <= fw->size && 780 moxa_check_fw(&fw->data[len])) 781 printk(KERN_WARNING "MOXA firmware: unexpected input " 782 "at offset %u, but going on\n", (u32)len); 783 if (!lens[a] && a < lencnt) { 784 sprintf(rsn, "too few entries in fw file"); 785 goto err; 786 } 787 len += lens[a]; 788 } 789 790 if (len != fw->size) { 791 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size, 792 (u32)len); 793 goto err; 794 } 795 796 ptr += MOXA_FW_HDRLEN; 797 lenp = 0; /* bios */ 798 799 strcpy(rsn, "read above"); 800 801 ret = moxa_load_bios(brd, ptr, lens[lenp]); 802 if (ret) 803 goto err; 804 805 /* we skip the tty section (lens[1]), since we don't need it */ 806 ptr += lens[lenp] + lens[lenp + 1]; 807 lenp += 2; /* comm */ 808 809 if (hdr->model == 2) { 810 ret = moxa_load_320b(brd, ptr, lens[lenp]); 811 if (ret) 812 goto err; 813 /* skip another tty */ 814 ptr += lens[lenp] + lens[lenp + 1]; 815 lenp += 2; 816 } 817 818 ret = moxa_load_code(brd, ptr, lens[lenp]); 819 if (ret) 820 goto err; 821 822 return 0; 823 err: 824 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn); 825 return ret; 826 } 827 828 static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev) 829 { 830 const struct firmware *fw; 831 const char *file; 832 struct moxa_port *p; 833 unsigned int i, first_idx; 834 int ret; 835 836 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports), 837 GFP_KERNEL); 838 if (brd->ports == NULL) { 839 printk(KERN_ERR "cannot allocate memory for ports\n"); 840 ret = -ENOMEM; 841 goto err; 842 } 843 844 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) { 845 tty_port_init(&p->port); 846 p->port.ops = &moxa_port_ops; 847 p->type = PORT_16550A; 848 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; 849 } 850 851 switch (brd->boardType) { 852 case MOXA_BOARD_C218_ISA: 853 case MOXA_BOARD_C218_PCI: 854 file = "c218tunx.cod"; 855 break; 856 case MOXA_BOARD_CP204J: 857 file = "cp204unx.cod"; 858 break; 859 default: 860 file = "c320tunx.cod"; 861 break; 862 } 863 864 ret = request_firmware(&fw, file, dev); 865 if (ret) { 866 printk(KERN_ERR "MOXA: request_firmware failed. Make sure " 867 "you've placed '%s' file into your firmware " 868 "loader directory (e.g. /lib/firmware)\n", 869 file); 870 goto err_free; 871 } 872 873 ret = moxa_load_fw(brd, fw); 874 875 release_firmware(fw); 876 877 if (ret) 878 goto err_free; 879 880 spin_lock_bh(&moxa_lock); 881 brd->ready = 1; 882 if (!timer_pending(&moxaTimer)) 883 mod_timer(&moxaTimer, jiffies + HZ / 50); 884 spin_unlock_bh(&moxa_lock); 885 886 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD; 887 for (i = 0; i < brd->numPorts; i++) 888 tty_port_register_device(&brd->ports[i].port, moxaDriver, 889 first_idx + i, dev); 890 891 return 0; 892 err_free: 893 for (i = 0; i < MAX_PORTS_PER_BOARD; i++) 894 tty_port_destroy(&brd->ports[i].port); 895 kfree(brd->ports); 896 err: 897 return ret; 898 } 899 900 static void moxa_board_deinit(struct moxa_board_conf *brd) 901 { 902 unsigned int a, opened, first_idx; 903 904 mutex_lock(&moxa_openlock); 905 spin_lock_bh(&moxa_lock); 906 brd->ready = 0; 907 spin_unlock_bh(&moxa_lock); 908 909 /* pci hot-un-plug support */ 910 for (a = 0; a < brd->numPorts; a++) 911 if (tty_port_initialized(&brd->ports[a].port)) 912 tty_port_tty_hangup(&brd->ports[a].port, false); 913 914 for (a = 0; a < MAX_PORTS_PER_BOARD; a++) 915 tty_port_destroy(&brd->ports[a].port); 916 917 while (1) { 918 opened = 0; 919 for (a = 0; a < brd->numPorts; a++) 920 if (tty_port_initialized(&brd->ports[a].port)) 921 opened++; 922 mutex_unlock(&moxa_openlock); 923 if (!opened) 924 break; 925 msleep(50); 926 mutex_lock(&moxa_openlock); 927 } 928 929 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD; 930 for (a = 0; a < brd->numPorts; a++) 931 tty_unregister_device(moxaDriver, first_idx + a); 932 933 iounmap(brd->basemem); 934 brd->basemem = NULL; 935 kfree(brd->ports); 936 } 937 938 #ifdef CONFIG_PCI 939 static int moxa_pci_probe(struct pci_dev *pdev, 940 const struct pci_device_id *ent) 941 { 942 struct moxa_board_conf *board; 943 unsigned int i; 944 int board_type = ent->driver_data; 945 int retval; 946 947 retval = pci_enable_device(pdev); 948 if (retval) { 949 dev_err(&pdev->dev, "can't enable pci device\n"); 950 goto err; 951 } 952 953 for (i = 0; i < MAX_BOARDS; i++) 954 if (moxa_boards[i].basemem == NULL) 955 break; 956 957 retval = -ENODEV; 958 if (i >= MAX_BOARDS) { 959 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards " 960 "found. Board is ignored.\n", MAX_BOARDS); 961 goto err; 962 } 963 964 board = &moxa_boards[i]; 965 966 retval = pci_request_region(pdev, 2, "moxa-base"); 967 if (retval) { 968 dev_err(&pdev->dev, "can't request pci region 2\n"); 969 goto err; 970 } 971 972 board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000); 973 if (board->basemem == NULL) { 974 dev_err(&pdev->dev, "can't remap io space 2\n"); 975 retval = -ENOMEM; 976 goto err_reg; 977 } 978 979 board->boardType = board_type; 980 switch (board_type) { 981 case MOXA_BOARD_C218_ISA: 982 case MOXA_BOARD_C218_PCI: 983 board->numPorts = 8; 984 break; 985 986 case MOXA_BOARD_CP204J: 987 board->numPorts = 4; 988 break; 989 default: 990 board->numPorts = 0; 991 break; 992 } 993 board->busType = MOXA_BUS_TYPE_PCI; 994 995 retval = moxa_init_board(board, &pdev->dev); 996 if (retval) 997 goto err_base; 998 999 pci_set_drvdata(pdev, board); 1000 1001 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n", 1002 moxa_brdname[board_type - 1], board->numPorts); 1003 1004 return 0; 1005 err_base: 1006 iounmap(board->basemem); 1007 board->basemem = NULL; 1008 err_reg: 1009 pci_release_region(pdev, 2); 1010 err: 1011 return retval; 1012 } 1013 1014 static void moxa_pci_remove(struct pci_dev *pdev) 1015 { 1016 struct moxa_board_conf *brd = pci_get_drvdata(pdev); 1017 1018 moxa_board_deinit(brd); 1019 1020 pci_release_region(pdev, 2); 1021 } 1022 1023 static struct pci_driver moxa_pci_driver = { 1024 .name = "moxa", 1025 .id_table = moxa_pcibrds, 1026 .probe = moxa_pci_probe, 1027 .remove = moxa_pci_remove 1028 }; 1029 #endif /* CONFIG_PCI */ 1030 1031 static int __init moxa_init(void) 1032 { 1033 unsigned int isabrds = 0; 1034 int retval = 0; 1035 struct moxa_board_conf *brd = moxa_boards; 1036 unsigned int i; 1037 1038 printk(KERN_INFO "MOXA Intellio family driver version %s\n", 1039 MOXA_VERSION); 1040 1041 tty_port_init(&moxa_service_port); 1042 1043 moxaDriver = tty_alloc_driver(MAX_PORTS + 1, 1044 TTY_DRIVER_REAL_RAW | 1045 TTY_DRIVER_DYNAMIC_DEV); 1046 if (IS_ERR(moxaDriver)) 1047 return PTR_ERR(moxaDriver); 1048 1049 moxaDriver->name = "ttyMX"; 1050 moxaDriver->major = ttymajor; 1051 moxaDriver->minor_start = 0; 1052 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL; 1053 moxaDriver->subtype = SERIAL_TYPE_NORMAL; 1054 moxaDriver->init_termios = tty_std_termios; 1055 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; 1056 moxaDriver->init_termios.c_ispeed = 9600; 1057 moxaDriver->init_termios.c_ospeed = 9600; 1058 tty_set_operations(moxaDriver, &moxa_ops); 1059 /* Having one more port only for ioctls is ugly */ 1060 tty_port_link_device(&moxa_service_port, moxaDriver, MAX_PORTS); 1061 1062 if (tty_register_driver(moxaDriver)) { 1063 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n"); 1064 put_tty_driver(moxaDriver); 1065 return -1; 1066 } 1067 1068 /* Find the boards defined from module args. */ 1069 1070 for (i = 0; i < MAX_BOARDS; i++) { 1071 if (!baseaddr[i]) 1072 break; 1073 if (type[i] == MOXA_BOARD_C218_ISA || 1074 type[i] == MOXA_BOARD_C320_ISA) { 1075 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n", 1076 isabrds + 1, moxa_brdname[type[i] - 1], 1077 baseaddr[i]); 1078 brd->boardType = type[i]; 1079 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 : 1080 numports[i]; 1081 brd->busType = MOXA_BUS_TYPE_ISA; 1082 brd->basemem = ioremap_nocache(baseaddr[i], 0x4000); 1083 if (!brd->basemem) { 1084 printk(KERN_ERR "MOXA: can't remap %lx\n", 1085 baseaddr[i]); 1086 continue; 1087 } 1088 if (moxa_init_board(brd, NULL)) { 1089 iounmap(brd->basemem); 1090 brd->basemem = NULL; 1091 continue; 1092 } 1093 1094 printk(KERN_INFO "MOXA isa board found at 0x%.8lx and " 1095 "ready (%u ports, firmware loaded)\n", 1096 baseaddr[i], brd->numPorts); 1097 1098 brd++; 1099 isabrds++; 1100 } 1101 } 1102 1103 #ifdef CONFIG_PCI 1104 retval = pci_register_driver(&moxa_pci_driver); 1105 if (retval) { 1106 printk(KERN_ERR "Can't register MOXA pci driver!\n"); 1107 if (isabrds) 1108 retval = 0; 1109 } 1110 #endif 1111 1112 return retval; 1113 } 1114 1115 static void __exit moxa_exit(void) 1116 { 1117 unsigned int i; 1118 1119 #ifdef CONFIG_PCI 1120 pci_unregister_driver(&moxa_pci_driver); 1121 #endif 1122 1123 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */ 1124 if (moxa_boards[i].ready) 1125 moxa_board_deinit(&moxa_boards[i]); 1126 1127 del_timer_sync(&moxaTimer); 1128 1129 if (tty_unregister_driver(moxaDriver)) 1130 printk(KERN_ERR "Couldn't unregister MOXA Intellio family " 1131 "serial driver\n"); 1132 put_tty_driver(moxaDriver); 1133 } 1134 1135 module_init(moxa_init); 1136 module_exit(moxa_exit); 1137 1138 static void moxa_shutdown(struct tty_port *port) 1139 { 1140 struct moxa_port *ch = container_of(port, struct moxa_port, port); 1141 MoxaPortDisable(ch); 1142 MoxaPortFlushData(ch, 2); 1143 } 1144 1145 static int moxa_carrier_raised(struct tty_port *port) 1146 { 1147 struct moxa_port *ch = container_of(port, struct moxa_port, port); 1148 int dcd; 1149 1150 spin_lock_irq(&port->lock); 1151 dcd = ch->DCDState; 1152 spin_unlock_irq(&port->lock); 1153 return dcd; 1154 } 1155 1156 static void moxa_dtr_rts(struct tty_port *port, int onoff) 1157 { 1158 struct moxa_port *ch = container_of(port, struct moxa_port, port); 1159 MoxaPortLineCtrl(ch, onoff, onoff); 1160 } 1161 1162 1163 static int moxa_open(struct tty_struct *tty, struct file *filp) 1164 { 1165 struct moxa_board_conf *brd; 1166 struct moxa_port *ch; 1167 int port; 1168 1169 port = tty->index; 1170 if (port == MAX_PORTS) { 1171 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM; 1172 } 1173 if (mutex_lock_interruptible(&moxa_openlock)) 1174 return -ERESTARTSYS; 1175 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD]; 1176 if (!brd->ready) { 1177 mutex_unlock(&moxa_openlock); 1178 return -ENODEV; 1179 } 1180 1181 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) { 1182 mutex_unlock(&moxa_openlock); 1183 return -ENODEV; 1184 } 1185 1186 ch = &brd->ports[port % MAX_PORTS_PER_BOARD]; 1187 ch->port.count++; 1188 tty->driver_data = ch; 1189 tty_port_tty_set(&ch->port, tty); 1190 mutex_lock(&ch->port.mutex); 1191 if (!tty_port_initialized(&ch->port)) { 1192 ch->statusflags = 0; 1193 moxa_set_tty_param(tty, &tty->termios); 1194 MoxaPortLineCtrl(ch, 1, 1); 1195 MoxaPortEnable(ch); 1196 MoxaSetFifo(ch, ch->type == PORT_16550A); 1197 tty_port_set_initialized(&ch->port, 1); 1198 } 1199 mutex_unlock(&ch->port.mutex); 1200 mutex_unlock(&moxa_openlock); 1201 1202 return tty_port_block_til_ready(&ch->port, tty, filp); 1203 } 1204 1205 static void moxa_close(struct tty_struct *tty, struct file *filp) 1206 { 1207 struct moxa_port *ch = tty->driver_data; 1208 ch->cflag = tty->termios.c_cflag; 1209 tty_port_close(&ch->port, tty, filp); 1210 } 1211 1212 static int moxa_write(struct tty_struct *tty, 1213 const unsigned char *buf, int count) 1214 { 1215 struct moxa_port *ch = tty->driver_data; 1216 unsigned long flags; 1217 int len; 1218 1219 if (ch == NULL) 1220 return 0; 1221 1222 spin_lock_irqsave(&moxa_lock, flags); 1223 len = MoxaPortWriteData(tty, buf, count); 1224 spin_unlock_irqrestore(&moxa_lock, flags); 1225 1226 set_bit(LOWWAIT, &ch->statusflags); 1227 return len; 1228 } 1229 1230 static int moxa_write_room(struct tty_struct *tty) 1231 { 1232 struct moxa_port *ch; 1233 1234 if (tty->stopped) 1235 return 0; 1236 ch = tty->driver_data; 1237 if (ch == NULL) 1238 return 0; 1239 return MoxaPortTxFree(ch); 1240 } 1241 1242 static void moxa_flush_buffer(struct tty_struct *tty) 1243 { 1244 struct moxa_port *ch = tty->driver_data; 1245 1246 if (ch == NULL) 1247 return; 1248 MoxaPortFlushData(ch, 1); 1249 tty_wakeup(tty); 1250 } 1251 1252 static int moxa_chars_in_buffer(struct tty_struct *tty) 1253 { 1254 struct moxa_port *ch = tty->driver_data; 1255 int chars; 1256 1257 chars = MoxaPortTxQueue(ch); 1258 if (chars) 1259 /* 1260 * Make it possible to wakeup anything waiting for output 1261 * in tty_ioctl.c, etc. 1262 */ 1263 set_bit(EMPTYWAIT, &ch->statusflags); 1264 return chars; 1265 } 1266 1267 static int moxa_tiocmget(struct tty_struct *tty) 1268 { 1269 struct moxa_port *ch = tty->driver_data; 1270 int flag = 0, dtr, rts; 1271 1272 MoxaPortGetLineOut(ch, &dtr, &rts); 1273 if (dtr) 1274 flag |= TIOCM_DTR; 1275 if (rts) 1276 flag |= TIOCM_RTS; 1277 dtr = MoxaPortLineStatus(ch); 1278 if (dtr & 1) 1279 flag |= TIOCM_CTS; 1280 if (dtr & 2) 1281 flag |= TIOCM_DSR; 1282 if (dtr & 4) 1283 flag |= TIOCM_CD; 1284 return flag; 1285 } 1286 1287 static int moxa_tiocmset(struct tty_struct *tty, 1288 unsigned int set, unsigned int clear) 1289 { 1290 struct moxa_port *ch; 1291 int dtr, rts; 1292 1293 mutex_lock(&moxa_openlock); 1294 ch = tty->driver_data; 1295 if (!ch) { 1296 mutex_unlock(&moxa_openlock); 1297 return -EINVAL; 1298 } 1299 1300 MoxaPortGetLineOut(ch, &dtr, &rts); 1301 if (set & TIOCM_RTS) 1302 rts = 1; 1303 if (set & TIOCM_DTR) 1304 dtr = 1; 1305 if (clear & TIOCM_RTS) 1306 rts = 0; 1307 if (clear & TIOCM_DTR) 1308 dtr = 0; 1309 MoxaPortLineCtrl(ch, dtr, rts); 1310 mutex_unlock(&moxa_openlock); 1311 return 0; 1312 } 1313 1314 static void moxa_set_termios(struct tty_struct *tty, 1315 struct ktermios *old_termios) 1316 { 1317 struct moxa_port *ch = tty->driver_data; 1318 1319 if (ch == NULL) 1320 return; 1321 moxa_set_tty_param(tty, old_termios); 1322 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty)) 1323 wake_up_interruptible(&ch->port.open_wait); 1324 } 1325 1326 static void moxa_stop(struct tty_struct *tty) 1327 { 1328 struct moxa_port *ch = tty->driver_data; 1329 1330 if (ch == NULL) 1331 return; 1332 MoxaPortTxDisable(ch); 1333 set_bit(TXSTOPPED, &ch->statusflags); 1334 } 1335 1336 1337 static void moxa_start(struct tty_struct *tty) 1338 { 1339 struct moxa_port *ch = tty->driver_data; 1340 1341 if (ch == NULL) 1342 return; 1343 1344 if (!test_bit(TXSTOPPED, &ch->statusflags)) 1345 return; 1346 1347 MoxaPortTxEnable(ch); 1348 clear_bit(TXSTOPPED, &ch->statusflags); 1349 } 1350 1351 static void moxa_hangup(struct tty_struct *tty) 1352 { 1353 struct moxa_port *ch = tty->driver_data; 1354 tty_port_hangup(&ch->port); 1355 } 1356 1357 static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd) 1358 { 1359 unsigned long flags; 1360 dcd = !!dcd; 1361 1362 spin_lock_irqsave(&p->port.lock, flags); 1363 if (dcd != p->DCDState) { 1364 p->DCDState = dcd; 1365 spin_unlock_irqrestore(&p->port.lock, flags); 1366 if (!dcd) 1367 tty_port_tty_hangup(&p->port, true); 1368 } 1369 else 1370 spin_unlock_irqrestore(&p->port.lock, flags); 1371 } 1372 1373 static 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 = tty_port_initialized(&p->port); 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 && !tty_throttled(tty) && 1394 MoxaPortRxQueue(p) > 0) { /* RX */ 1395 MoxaPortReadData(p); 1396 tty_schedule_flip(&p->port); 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(&p->port, 0, TTY_BREAK); 1421 tty_schedule_flip(&p->port); 1422 } 1423 1424 if (intr & IntrLine) 1425 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state); 1426 put: 1427 tty_kref_put(tty); 1428 1429 return 0; 1430 } 1431 1432 static void moxa_poll(struct timer_list *unused) 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 1474 static 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 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany); 1491 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty)); 1492 if (baud == -1) 1493 baud = tty_termios_baud_rate(old_termios); 1494 /* Not put the baud rate into the termios data */ 1495 tty_encode_baud_rate(tty, baud, baud); 1496 } 1497 1498 /***************************************************************************** 1499 * Driver level functions: * 1500 *****************************************************************************/ 1501 1502 static void MoxaPortFlushData(struct moxa_port *port, int mode) 1503 { 1504 void __iomem *ofsAddr; 1505 if (mode < 0 || mode > 2) 1506 return; 1507 ofsAddr = port->tableAddr; 1508 moxafunc(ofsAddr, FC_FlushQueue, mode); 1509 if (mode != 1) { 1510 port->lowChkFlag = 0; 1511 moxa_low_water_check(ofsAddr); 1512 } 1513 } 1514 1515 /* 1516 * Moxa Port Number Description: 1517 * 1518 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And, 1519 * the port number using in MOXA driver functions will be 0 to 31 for 1520 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96 1521 * to 127 for fourth. For example, if you setup three MOXA boards, 1522 * first board is C218, second board is C320-16 and third board is 1523 * C320-32. The port number of first board (C218 - 8 ports) is from 1524 * 0 to 7. The port number of second board (C320 - 16 ports) is form 1525 * 32 to 47. The port number of third board (C320 - 32 ports) is from 1526 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to 1527 * 127 will be invalid. 1528 * 1529 * 1530 * Moxa Functions Description: 1531 * 1532 * Function 1: Driver initialization routine, this routine must be 1533 * called when initialized driver. 1534 * Syntax: 1535 * void MoxaDriverInit(); 1536 * 1537 * 1538 * Function 2: Moxa driver private IOCTL command processing. 1539 * Syntax: 1540 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port); 1541 * 1542 * unsigned int cmd : IOCTL command 1543 * unsigned long arg : IOCTL argument 1544 * int port : port number (0 - 127) 1545 * 1546 * return: 0 (OK) 1547 * -EINVAL 1548 * -ENOIOCTLCMD 1549 * 1550 * 1551 * Function 6: Enable this port to start Tx/Rx data. 1552 * Syntax: 1553 * void MoxaPortEnable(int port); 1554 * int port : port number (0 - 127) 1555 * 1556 * 1557 * Function 7: Disable this port 1558 * Syntax: 1559 * void MoxaPortDisable(int port); 1560 * int port : port number (0 - 127) 1561 * 1562 * 1563 * Function 10: Setting baud rate of this port. 1564 * Syntax: 1565 * speed_t MoxaPortSetBaud(int port, speed_t baud); 1566 * int port : port number (0 - 127) 1567 * long baud : baud rate (50 - 115200) 1568 * 1569 * return: 0 : this port is invalid or baud < 50 1570 * 50 - 115200 : the real baud rate set to the port, if 1571 * the argument baud is large than maximun 1572 * available baud rate, the real setting 1573 * baud rate will be the maximun baud rate. 1574 * 1575 * 1576 * Function 12: Configure the port. 1577 * Syntax: 1578 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud); 1579 * int port : port number (0 - 127) 1580 * struct ktermios * termio : termio structure pointer 1581 * speed_t baud : baud rate 1582 * 1583 * return: -1 : this port is invalid or termio == NULL 1584 * 0 : setting O.K. 1585 * 1586 * 1587 * Function 13: Get the DTR/RTS state of this port. 1588 * Syntax: 1589 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); 1590 * int port : port number (0 - 127) 1591 * int * dtrState : pointer to INT to receive the current DTR 1592 * state. (if NULL, this function will not 1593 * write to this address) 1594 * int * rtsState : pointer to INT to receive the current RTS 1595 * state. (if NULL, this function will not 1596 * write to this address) 1597 * 1598 * return: -1 : this port is invalid 1599 * 0 : O.K. 1600 * 1601 * 1602 * Function 14: Setting the DTR/RTS output state of this port. 1603 * Syntax: 1604 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState); 1605 * int port : port number (0 - 127) 1606 * int dtrState : DTR output state (0: off, 1: on) 1607 * int rtsState : RTS output state (0: off, 1: on) 1608 * 1609 * 1610 * Function 15: Setting the flow control of this port. 1611 * Syntax: 1612 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow, 1613 * int txFlow,int xany); 1614 * int port : port number (0 - 127) 1615 * int rtsFlow : H/W RTS flow control (0: no, 1: yes) 1616 * int ctsFlow : H/W CTS flow control (0: no, 1: yes) 1617 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes) 1618 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes) 1619 * int xany : S/W XANY flow control (0: no, 1: yes) 1620 * 1621 * 1622 * Function 16: Get ths line status of this port 1623 * Syntax: 1624 * int MoxaPortLineStatus(int port); 1625 * int port : port number (0 - 127) 1626 * 1627 * return: Bit 0 - CTS state (0: off, 1: on) 1628 * Bit 1 - DSR state (0: off, 1: on) 1629 * Bit 2 - DCD state (0: off, 1: on) 1630 * 1631 * 1632 * Function 19: Flush the Rx/Tx buffer data of this port. 1633 * Syntax: 1634 * void MoxaPortFlushData(int port, int mode); 1635 * int port : port number (0 - 127) 1636 * int mode 1637 * 0 : flush the Rx buffer 1638 * 1 : flush the Tx buffer 1639 * 2 : flush the Rx and Tx buffer 1640 * 1641 * 1642 * Function 20: Write data. 1643 * Syntax: 1644 * int MoxaPortWriteData(int port, unsigned char * buffer, int length); 1645 * int port : port number (0 - 127) 1646 * unsigned char * buffer : pointer to write data buffer. 1647 * int length : write data length 1648 * 1649 * return: 0 - length : real write data length 1650 * 1651 * 1652 * Function 21: Read data. 1653 * Syntax: 1654 * int MoxaPortReadData(int port, struct tty_struct *tty); 1655 * int port : port number (0 - 127) 1656 * struct tty_struct *tty : tty for data 1657 * 1658 * return: 0 - length : real read data length 1659 * 1660 * 1661 * Function 24: Get the Tx buffer current queued data bytes 1662 * Syntax: 1663 * int MoxaPortTxQueue(int port); 1664 * int port : port number (0 - 127) 1665 * 1666 * return: .. : Tx buffer current queued data bytes 1667 * 1668 * 1669 * Function 25: Get the Tx buffer current free space 1670 * Syntax: 1671 * int MoxaPortTxFree(int port); 1672 * int port : port number (0 - 127) 1673 * 1674 * return: .. : Tx buffer current free space 1675 * 1676 * 1677 * Function 26: Get the Rx buffer current queued data bytes 1678 * Syntax: 1679 * int MoxaPortRxQueue(int port); 1680 * int port : port number (0 - 127) 1681 * 1682 * return: .. : Rx buffer current queued data bytes 1683 * 1684 * 1685 * Function 28: Disable port data transmission. 1686 * Syntax: 1687 * void MoxaPortTxDisable(int port); 1688 * int port : port number (0 - 127) 1689 * 1690 * 1691 * Function 29: Enable port data transmission. 1692 * Syntax: 1693 * void MoxaPortTxEnable(int port); 1694 * int port : port number (0 - 127) 1695 * 1696 * 1697 * Function 31: Get the received BREAK signal count and reset it. 1698 * Syntax: 1699 * int MoxaPortResetBrkCnt(int port); 1700 * int port : port number (0 - 127) 1701 * 1702 * return: 0 - .. : BREAK signal count 1703 * 1704 * 1705 */ 1706 1707 static void MoxaPortEnable(struct moxa_port *port) 1708 { 1709 void __iomem *ofsAddr; 1710 u16 lowwater = 512; 1711 1712 ofsAddr = port->tableAddr; 1713 writew(lowwater, ofsAddr + Low_water); 1714 if (MOXA_IS_320(port->board)) 1715 moxafunc(ofsAddr, FC_SetBreakIrq, 0); 1716 else 1717 writew(readw(ofsAddr + HostStat) | WakeupBreak, 1718 ofsAddr + HostStat); 1719 1720 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code); 1721 moxafunc(ofsAddr, FC_FlushQueue, 2); 1722 1723 moxafunc(ofsAddr, FC_EnableCH, Magic_code); 1724 MoxaPortLineStatus(port); 1725 } 1726 1727 static void MoxaPortDisable(struct moxa_port *port) 1728 { 1729 void __iomem *ofsAddr = port->tableAddr; 1730 1731 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */ 1732 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code); 1733 writew(0, ofsAddr + HostStat); 1734 moxafunc(ofsAddr, FC_DisableCH, Magic_code); 1735 } 1736 1737 static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud) 1738 { 1739 void __iomem *ofsAddr = port->tableAddr; 1740 unsigned int clock, val; 1741 speed_t max; 1742 1743 max = MOXA_IS_320(port->board) ? 460800 : 921600; 1744 if (baud < 50) 1745 return 0; 1746 if (baud > max) 1747 baud = max; 1748 clock = 921600; 1749 val = clock / baud; 1750 moxafunc(ofsAddr, FC_SetBaud, val); 1751 baud = clock / val; 1752 return baud; 1753 } 1754 1755 static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio, 1756 speed_t baud) 1757 { 1758 void __iomem *ofsAddr; 1759 tcflag_t mode = 0; 1760 1761 ofsAddr = port->tableAddr; 1762 1763 mode = termio->c_cflag & CSIZE; 1764 if (mode == CS5) 1765 mode = MX_CS5; 1766 else if (mode == CS6) 1767 mode = MX_CS6; 1768 else if (mode == CS7) 1769 mode = MX_CS7; 1770 else if (mode == CS8) 1771 mode = MX_CS8; 1772 1773 if (termio->c_cflag & CSTOPB) { 1774 if (mode == MX_CS5) 1775 mode |= MX_STOP15; 1776 else 1777 mode |= MX_STOP2; 1778 } else 1779 mode |= MX_STOP1; 1780 1781 if (termio->c_cflag & PARENB) { 1782 if (termio->c_cflag & PARODD) { 1783 if (termio->c_cflag & CMSPAR) 1784 mode |= MX_PARMARK; 1785 else 1786 mode |= MX_PARODD; 1787 } else { 1788 if (termio->c_cflag & CMSPAR) 1789 mode |= MX_PARSPACE; 1790 else 1791 mode |= MX_PAREVEN; 1792 } 1793 } else 1794 mode |= MX_PARNONE; 1795 1796 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode); 1797 1798 if (MOXA_IS_320(port->board) && baud >= 921600) 1799 return -1; 1800 1801 baud = MoxaPortSetBaud(port, baud); 1802 1803 if (termio->c_iflag & (IXON | IXOFF | IXANY)) { 1804 spin_lock_irq(&moxafunc_lock); 1805 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg); 1806 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1); 1807 writeb(FC_SetXonXoff, ofsAddr + FuncCode); 1808 moxa_wait_finish(ofsAddr); 1809 spin_unlock_irq(&moxafunc_lock); 1810 1811 } 1812 return baud; 1813 } 1814 1815 static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState, 1816 int *rtsState) 1817 { 1818 if (dtrState) 1819 *dtrState = !!(port->lineCtrl & DTR_ON); 1820 if (rtsState) 1821 *rtsState = !!(port->lineCtrl & RTS_ON); 1822 1823 return 0; 1824 } 1825 1826 static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts) 1827 { 1828 u8 mode = 0; 1829 1830 if (dtr) 1831 mode |= DTR_ON; 1832 if (rts) 1833 mode |= RTS_ON; 1834 port->lineCtrl = mode; 1835 moxafunc(port->tableAddr, FC_LineControl, mode); 1836 } 1837 1838 static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts, 1839 int txflow, int rxflow, int txany) 1840 { 1841 int mode = 0; 1842 1843 if (rts) 1844 mode |= RTS_FlowCtl; 1845 if (cts) 1846 mode |= CTS_FlowCtl; 1847 if (txflow) 1848 mode |= Tx_FlowCtl; 1849 if (rxflow) 1850 mode |= Rx_FlowCtl; 1851 if (txany) 1852 mode |= IXM_IXANY; 1853 moxafunc(port->tableAddr, FC_SetFlowCtl, mode); 1854 } 1855 1856 static int MoxaPortLineStatus(struct moxa_port *port) 1857 { 1858 void __iomem *ofsAddr; 1859 int val; 1860 1861 ofsAddr = port->tableAddr; 1862 if (MOXA_IS_320(port->board)) 1863 val = moxafuncret(ofsAddr, FC_LineStatus, 0); 1864 else 1865 val = readw(ofsAddr + FlagStat) >> 4; 1866 val &= 0x0B; 1867 if (val & 8) 1868 val |= 4; 1869 moxa_new_dcdstate(port, val & 8); 1870 val &= 7; 1871 return val; 1872 } 1873 1874 static int MoxaPortWriteData(struct tty_struct *tty, 1875 const unsigned char *buffer, int len) 1876 { 1877 struct moxa_port *port = tty->driver_data; 1878 void __iomem *baseAddr, *ofsAddr, *ofs; 1879 unsigned int c, total; 1880 u16 head, tail, tx_mask, spage, epage; 1881 u16 pageno, pageofs, bufhead; 1882 1883 ofsAddr = port->tableAddr; 1884 baseAddr = port->board->basemem; 1885 tx_mask = readw(ofsAddr + TX_mask); 1886 spage = readw(ofsAddr + Page_txb); 1887 epage = readw(ofsAddr + EndPage_txb); 1888 tail = readw(ofsAddr + TXwptr); 1889 head = readw(ofsAddr + TXrptr); 1890 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask); 1891 if (c > len) 1892 c = len; 1893 moxaLog.txcnt[port->port.tty->index] += c; 1894 total = c; 1895 if (spage == epage) { 1896 bufhead = readw(ofsAddr + Ofs_txb); 1897 writew(spage, baseAddr + Control_reg); 1898 while (c > 0) { 1899 if (head > tail) 1900 len = head - tail - 1; 1901 else 1902 len = tx_mask + 1 - tail; 1903 len = (c > len) ? len : c; 1904 ofs = baseAddr + DynPage_addr + bufhead + tail; 1905 memcpy_toio(ofs, buffer, len); 1906 buffer += len; 1907 tail = (tail + len) & tx_mask; 1908 c -= len; 1909 } 1910 } else { 1911 pageno = spage + (tail >> 13); 1912 pageofs = tail & Page_mask; 1913 while (c > 0) { 1914 len = Page_size - pageofs; 1915 if (len > c) 1916 len = c; 1917 writeb(pageno, baseAddr + Control_reg); 1918 ofs = baseAddr + DynPage_addr + pageofs; 1919 memcpy_toio(ofs, buffer, len); 1920 buffer += len; 1921 if (++pageno == epage) 1922 pageno = spage; 1923 pageofs = 0; 1924 c -= len; 1925 } 1926 tail = (tail + total) & tx_mask; 1927 } 1928 writew(tail, ofsAddr + TXwptr); 1929 writeb(1, ofsAddr + CD180TXirq); /* start to send */ 1930 return total; 1931 } 1932 1933 static int MoxaPortReadData(struct moxa_port *port) 1934 { 1935 struct tty_struct *tty = port->port.tty; 1936 unsigned char *dst; 1937 void __iomem *baseAddr, *ofsAddr, *ofs; 1938 unsigned int count, len, total; 1939 u16 tail, rx_mask, spage, epage; 1940 u16 pageno, pageofs, bufhead, head; 1941 1942 ofsAddr = port->tableAddr; 1943 baseAddr = port->board->basemem; 1944 head = readw(ofsAddr + RXrptr); 1945 tail = readw(ofsAddr + RXwptr); 1946 rx_mask = readw(ofsAddr + RX_mask); 1947 spage = readw(ofsAddr + Page_rxb); 1948 epage = readw(ofsAddr + EndPage_rxb); 1949 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1); 1950 if (count == 0) 1951 return 0; 1952 1953 total = count; 1954 moxaLog.rxcnt[tty->index] += total; 1955 if (spage == epage) { 1956 bufhead = readw(ofsAddr + Ofs_rxb); 1957 writew(spage, baseAddr + Control_reg); 1958 while (count > 0) { 1959 ofs = baseAddr + DynPage_addr + bufhead + head; 1960 len = (tail >= head) ? (tail - head) : 1961 (rx_mask + 1 - head); 1962 len = tty_prepare_flip_string(&port->port, &dst, 1963 min(len, count)); 1964 memcpy_fromio(dst, ofs, len); 1965 head = (head + len) & rx_mask; 1966 count -= len; 1967 } 1968 } else { 1969 pageno = spage + (head >> 13); 1970 pageofs = head & Page_mask; 1971 while (count > 0) { 1972 writew(pageno, baseAddr + Control_reg); 1973 ofs = baseAddr + DynPage_addr + pageofs; 1974 len = tty_prepare_flip_string(&port->port, &dst, 1975 min(Page_size - pageofs, count)); 1976 memcpy_fromio(dst, ofs, len); 1977 1978 count -= len; 1979 pageofs = (pageofs + len) & Page_mask; 1980 if (pageofs == 0 && ++pageno == epage) 1981 pageno = spage; 1982 } 1983 head = (head + total) & rx_mask; 1984 } 1985 writew(head, ofsAddr + RXrptr); 1986 if (readb(ofsAddr + FlagStat) & Xoff_state) { 1987 moxaLowWaterChk = 1; 1988 port->lowChkFlag = 1; 1989 } 1990 return total; 1991 } 1992 1993 1994 static int MoxaPortTxQueue(struct moxa_port *port) 1995 { 1996 void __iomem *ofsAddr = port->tableAddr; 1997 u16 rptr, wptr, mask; 1998 1999 rptr = readw(ofsAddr + TXrptr); 2000 wptr = readw(ofsAddr + TXwptr); 2001 mask = readw(ofsAddr + TX_mask); 2002 return (wptr - rptr) & mask; 2003 } 2004 2005 static int MoxaPortTxFree(struct moxa_port *port) 2006 { 2007 void __iomem *ofsAddr = port->tableAddr; 2008 u16 rptr, wptr, mask; 2009 2010 rptr = readw(ofsAddr + TXrptr); 2011 wptr = readw(ofsAddr + TXwptr); 2012 mask = readw(ofsAddr + TX_mask); 2013 return mask - ((wptr - rptr) & mask); 2014 } 2015 2016 static int MoxaPortRxQueue(struct moxa_port *port) 2017 { 2018 void __iomem *ofsAddr = port->tableAddr; 2019 u16 rptr, wptr, mask; 2020 2021 rptr = readw(ofsAddr + RXrptr); 2022 wptr = readw(ofsAddr + RXwptr); 2023 mask = readw(ofsAddr + RX_mask); 2024 return (wptr - rptr) & mask; 2025 } 2026 2027 static void MoxaPortTxDisable(struct moxa_port *port) 2028 { 2029 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code); 2030 } 2031 2032 static void MoxaPortTxEnable(struct moxa_port *port) 2033 { 2034 moxafunc(port->tableAddr, FC_SetXonState, Magic_code); 2035 } 2036 2037 static int moxa_get_serial_info(struct moxa_port *info, 2038 struct serial_struct __user *retinfo) 2039 { 2040 struct serial_struct tmp = { 2041 .type = info->type, 2042 .line = info->port.tty->index, 2043 .flags = info->port.flags, 2044 .baud_base = 921600, 2045 .close_delay = info->port.close_delay 2046 }; 2047 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0; 2048 } 2049 2050 2051 static int moxa_set_serial_info(struct moxa_port *info, 2052 struct serial_struct __user *new_info) 2053 { 2054 struct serial_struct new_serial; 2055 2056 if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) 2057 return -EFAULT; 2058 2059 if (new_serial.irq != 0 || new_serial.port != 0 || 2060 new_serial.custom_divisor != 0 || 2061 new_serial.baud_base != 921600) 2062 return -EPERM; 2063 2064 if (!capable(CAP_SYS_ADMIN)) { 2065 if (((new_serial.flags & ~ASYNC_USR_MASK) != 2066 (info->port.flags & ~ASYNC_USR_MASK))) 2067 return -EPERM; 2068 } else 2069 info->port.close_delay = new_serial.close_delay * HZ / 100; 2070 2071 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS); 2072 new_serial.flags |= (info->port.flags & ASYNC_FLAGS); 2073 2074 MoxaSetFifo(info, new_serial.type == PORT_16550A); 2075 2076 info->type = new_serial.type; 2077 return 0; 2078 } 2079 2080 2081 2082 /***************************************************************************** 2083 * Static local functions: * 2084 *****************************************************************************/ 2085 2086 static void MoxaSetFifo(struct moxa_port *port, int enable) 2087 { 2088 void __iomem *ofsAddr = port->tableAddr; 2089 2090 if (!enable) { 2091 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0); 2092 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1); 2093 } else { 2094 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3); 2095 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16); 2096 } 2097 } 2098