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