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 #define MOXA 0x400 49 #define MOXA_GET_IQUEUE (MOXA + 1) /* get input buffered count */ 50 #define MOXA_GET_OQUEUE (MOXA + 2) /* get output buffered count */ 51 #define MOXA_GETDATACOUNT (MOXA + 23) 52 #define MOXA_GET_IOQUEUE (MOXA + 27) 53 #define MOXA_FLUSH_QUEUE (MOXA + 28) 54 #define MOXA_GETMSTATUS (MOXA + 65) 55 56 /* 57 * System Configuration 58 */ 59 60 #define Magic_code 0x404 61 62 /* 63 * for C218 BIOS initialization 64 */ 65 #define C218_ConfBase 0x800 66 #define C218_status (C218_ConfBase + 0) /* BIOS running status */ 67 #define C218_diag (C218_ConfBase + 2) /* diagnostic status */ 68 #define C218_key (C218_ConfBase + 4) /* WORD (0x218 for C218) */ 69 #define C218DLoad_len (C218_ConfBase + 6) /* WORD */ 70 #define C218check_sum (C218_ConfBase + 8) /* BYTE */ 71 #define C218chksum_ok (C218_ConfBase + 0x0a) /* BYTE (1:ok) */ 72 #define C218_TestRx (C218_ConfBase + 0x10) /* 8 bytes for 8 ports */ 73 #define C218_TestTx (C218_ConfBase + 0x18) /* 8 bytes for 8 ports */ 74 #define C218_RXerr (C218_ConfBase + 0x20) /* 8 bytes for 8 ports */ 75 #define C218_ErrFlag (C218_ConfBase + 0x28) /* 8 bytes for 8 ports */ 76 77 #define C218_LoadBuf 0x0F00 78 #define C218_KeyCode 0x218 79 #define CP204J_KeyCode 0x204 80 81 /* 82 * for C320 BIOS initialization 83 */ 84 #define C320_ConfBase 0x800 85 #define C320_LoadBuf 0x0f00 86 #define STS_init 0x05 /* for C320_status */ 87 88 #define C320_status C320_ConfBase + 0 /* BIOS running status */ 89 #define C320_diag C320_ConfBase + 2 /* diagnostic status */ 90 #define C320_key C320_ConfBase + 4 /* WORD (0320H for C320) */ 91 #define C320DLoad_len C320_ConfBase + 6 /* WORD */ 92 #define C320check_sum C320_ConfBase + 8 /* WORD */ 93 #define C320chksum_ok C320_ConfBase + 0x0a /* WORD (1:ok) */ 94 #define C320bapi_len C320_ConfBase + 0x0c /* WORD */ 95 #define C320UART_no C320_ConfBase + 0x0e /* WORD */ 96 97 #define C320_KeyCode 0x320 98 99 #define FixPage_addr 0x0000 /* starting addr of static page */ 100 #define DynPage_addr 0x2000 /* starting addr of dynamic page */ 101 #define C218_start 0x3000 /* starting addr of C218 BIOS prg */ 102 #define Control_reg 0x1ff0 /* select page and reset control */ 103 #define HW_reset 0x80 104 105 /* 106 * Function Codes 107 */ 108 #define FC_CardReset 0x80 109 #define FC_ChannelReset 1 /* C320 firmware not supported */ 110 #define FC_EnableCH 2 111 #define FC_DisableCH 3 112 #define FC_SetParam 4 113 #define FC_SetMode 5 114 #define FC_SetRate 6 115 #define FC_LineControl 7 116 #define FC_LineStatus 8 117 #define FC_XmitControl 9 118 #define FC_FlushQueue 10 119 #define FC_SendBreak 11 120 #define FC_StopBreak 12 121 #define FC_LoopbackON 13 122 #define FC_LoopbackOFF 14 123 #define FC_ClrIrqTable 15 124 #define FC_SendXon 16 125 #define FC_SetTermIrq 17 /* C320 firmware not supported */ 126 #define FC_SetCntIrq 18 /* C320 firmware not supported */ 127 #define FC_SetBreakIrq 19 128 #define FC_SetLineIrq 20 129 #define FC_SetFlowCtl 21 130 #define FC_GenIrq 22 131 #define FC_InCD180 23 132 #define FC_OutCD180 24 133 #define FC_InUARTreg 23 134 #define FC_OutUARTreg 24 135 #define FC_SetXonXoff 25 136 #define FC_OutCD180CCR 26 137 #define FC_ExtIQueue 27 138 #define FC_ExtOQueue 28 139 #define FC_ClrLineIrq 29 140 #define FC_HWFlowCtl 30 141 #define FC_GetClockRate 35 142 #define FC_SetBaud 36 143 #define FC_SetDataMode 41 144 #define FC_GetCCSR 43 145 #define FC_GetDataError 45 146 #define FC_RxControl 50 147 #define FC_ImmSend 51 148 #define FC_SetXonState 52 149 #define FC_SetXoffState 53 150 #define FC_SetRxFIFOTrig 54 151 #define FC_SetTxFIFOCnt 55 152 #define FC_UnixRate 56 153 #define FC_UnixResetTimer 57 154 155 #define RxFIFOTrig1 0 156 #define RxFIFOTrig4 1 157 #define RxFIFOTrig8 2 158 #define RxFIFOTrig14 3 159 160 /* 161 * Dual-Ported RAM 162 */ 163 #define DRAM_global 0 164 #define INT_data (DRAM_global + 0) 165 #define Config_base (DRAM_global + 0x108) 166 167 #define IRQindex (INT_data + 0) 168 #define IRQpending (INT_data + 4) 169 #define IRQtable (INT_data + 8) 170 171 /* 172 * Interrupt Status 173 */ 174 #define IntrRx 0x01 /* receiver data O.K. */ 175 #define IntrTx 0x02 /* transmit buffer empty */ 176 #define IntrFunc 0x04 /* function complete */ 177 #define IntrBreak 0x08 /* received break */ 178 #define IntrLine 0x10 /* line status change 179 for transmitter */ 180 #define IntrIntr 0x20 /* received INTR code */ 181 #define IntrQuit 0x40 /* received QUIT code */ 182 #define IntrEOF 0x80 /* received EOF code */ 183 184 #define IntrRxTrigger 0x100 /* rx data count reach trigger value */ 185 #define IntrTxTrigger 0x200 /* tx data count below trigger value */ 186 187 #define Magic_no (Config_base + 0) 188 #define Card_model_no (Config_base + 2) 189 #define Total_ports (Config_base + 4) 190 #define Module_cnt (Config_base + 8) 191 #define Module_no (Config_base + 10) 192 #define Timer_10ms (Config_base + 14) 193 #define Disable_IRQ (Config_base + 20) 194 #define TMS320_PORT1 (Config_base + 22) 195 #define TMS320_PORT2 (Config_base + 24) 196 #define TMS320_CLOCK (Config_base + 26) 197 198 /* 199 * DATA BUFFER in DRAM 200 */ 201 #define Extern_table 0x400 /* Base address of the external table 202 (24 words * 64) total 3K bytes 203 (24 words * 128) total 6K bytes */ 204 #define Extern_size 0x60 /* 96 bytes */ 205 #define RXrptr 0x00 /* read pointer for RX buffer */ 206 #define RXwptr 0x02 /* write pointer for RX buffer */ 207 #define TXrptr 0x04 /* read pointer for TX buffer */ 208 #define TXwptr 0x06 /* write pointer for TX buffer */ 209 #define HostStat 0x08 /* IRQ flag and general flag */ 210 #define FlagStat 0x0A 211 #define FlowControl 0x0C /* B7 B6 B5 B4 B3 B2 B1 B0 */ 212 /* x x x x | | | | */ 213 /* | | | + CTS flow */ 214 /* | | +--- RTS flow */ 215 /* | +------ TX Xon/Xoff */ 216 /* +--------- RX Xon/Xoff */ 217 #define Break_cnt 0x0E /* received break count */ 218 #define CD180TXirq 0x10 /* if non-0: enable TX irq */ 219 #define RX_mask 0x12 220 #define TX_mask 0x14 221 #define Ofs_rxb 0x16 222 #define Ofs_txb 0x18 223 #define Page_rxb 0x1A 224 #define Page_txb 0x1C 225 #define EndPage_rxb 0x1E 226 #define EndPage_txb 0x20 227 #define Data_error 0x22 228 #define RxTrigger 0x28 229 #define TxTrigger 0x2a 230 231 #define rRXwptr 0x34 232 #define Low_water 0x36 233 234 #define FuncCode 0x40 235 #define FuncArg 0x42 236 #define FuncArg1 0x44 237 238 #define C218rx_size 0x2000 /* 8K bytes */ 239 #define C218tx_size 0x8000 /* 32K bytes */ 240 241 #define C218rx_mask (C218rx_size - 1) 242 #define C218tx_mask (C218tx_size - 1) 243 244 #define C320p8rx_size 0x2000 245 #define C320p8tx_size 0x8000 246 #define C320p8rx_mask (C320p8rx_size - 1) 247 #define C320p8tx_mask (C320p8tx_size - 1) 248 249 #define C320p16rx_size 0x2000 250 #define C320p16tx_size 0x4000 251 #define C320p16rx_mask (C320p16rx_size - 1) 252 #define C320p16tx_mask (C320p16tx_size - 1) 253 254 #define C320p24rx_size 0x2000 255 #define C320p24tx_size 0x2000 256 #define C320p24rx_mask (C320p24rx_size - 1) 257 #define C320p24tx_mask (C320p24tx_size - 1) 258 259 #define C320p32rx_size 0x1000 260 #define C320p32tx_size 0x1000 261 #define C320p32rx_mask (C320p32rx_size - 1) 262 #define C320p32tx_mask (C320p32tx_size - 1) 263 264 #define Page_size 0x2000U 265 #define Page_mask (Page_size - 1) 266 #define C218rx_spage 3 267 #define C218tx_spage 4 268 #define C218rx_pageno 1 269 #define C218tx_pageno 4 270 #define C218buf_pageno 5 271 272 #define C320p8rx_spage 3 273 #define C320p8tx_spage 4 274 #define C320p8rx_pgno 1 275 #define C320p8tx_pgno 4 276 #define C320p8buf_pgno 5 277 278 #define C320p16rx_spage 3 279 #define C320p16tx_spage 4 280 #define C320p16rx_pgno 1 281 #define C320p16tx_pgno 2 282 #define C320p16buf_pgno 3 283 284 #define C320p24rx_spage 3 285 #define C320p24tx_spage 4 286 #define C320p24rx_pgno 1 287 #define C320p24tx_pgno 1 288 #define C320p24buf_pgno 2 289 290 #define C320p32rx_spage 3 291 #define C320p32tx_ofs C320p32rx_size 292 #define C320p32tx_spage 3 293 #define C320p32buf_pgno 1 294 295 /* 296 * Host Status 297 */ 298 #define WakeupRx 0x01 299 #define WakeupTx 0x02 300 #define WakeupBreak 0x08 301 #define WakeupLine 0x10 302 #define WakeupIntr 0x20 303 #define WakeupQuit 0x40 304 #define WakeupEOF 0x80 /* used in VTIME control */ 305 #define WakeupRxTrigger 0x100 306 #define WakeupTxTrigger 0x200 307 /* 308 * Flag status 309 */ 310 #define Rx_over 0x01 311 #define Xoff_state 0x02 312 #define Tx_flowOff 0x04 313 #define Tx_enable 0x08 314 #define CTS_state 0x10 315 #define DSR_state 0x20 316 #define DCD_state 0x80 317 /* 318 * FlowControl 319 */ 320 #define CTS_FlowCtl 1 321 #define RTS_FlowCtl 2 322 #define Tx_FlowCtl 4 323 #define Rx_FlowCtl 8 324 #define IXM_IXANY 0x10 325 326 #define LowWater 128 327 328 #define DTR_ON 1 329 #define RTS_ON 2 330 #define CTS_ON 1 331 #define DSR_ON 2 332 #define DCD_ON 8 333 334 /* mode definition */ 335 #define MX_CS8 0x03 336 #define MX_CS7 0x02 337 #define MX_CS6 0x01 338 #define MX_CS5 0x00 339 340 #define MX_STOP1 0x00 341 #define MX_STOP15 0x04 342 #define MX_STOP2 0x08 343 344 #define MX_PARNONE 0x00 345 #define MX_PAREVEN 0x40 346 #define MX_PARODD 0xC0 347 #define MX_PARMARK 0xA0 348 #define MX_PARSPACE 0x20 349 350 #define MOXA_VERSION "6.0k" 351 352 #define MOXA_FW_HDRLEN 32 353 354 #define MOXAMAJOR 172 355 356 #define MAX_BOARDS 4 /* Don't change this value */ 357 #define MAX_PORTS_PER_BOARD 32 /* Don't change this value */ 358 #define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD) 359 360 #define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \ 361 (brd)->boardType == MOXA_BOARD_C320_PCI) 362 363 /* 364 * Define the Moxa PCI vendor and device IDs. 365 */ 366 #define MOXA_BUS_TYPE_ISA 0 367 #define MOXA_BUS_TYPE_PCI 1 368 369 enum { 370 MOXA_BOARD_C218_PCI = 1, 371 MOXA_BOARD_C218_ISA, 372 MOXA_BOARD_C320_PCI, 373 MOXA_BOARD_C320_ISA, 374 MOXA_BOARD_CP204J, 375 }; 376 377 static char *moxa_brdname[] = 378 { 379 "C218 Turbo PCI series", 380 "C218 Turbo ISA series", 381 "C320 Turbo PCI series", 382 "C320 Turbo ISA series", 383 "CP-204J series", 384 }; 385 386 #ifdef CONFIG_PCI 387 static const struct pci_device_id moxa_pcibrds[] = { 388 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218), 389 .driver_data = MOXA_BOARD_C218_PCI }, 390 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320), 391 .driver_data = MOXA_BOARD_C320_PCI }, 392 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J), 393 .driver_data = MOXA_BOARD_CP204J }, 394 { 0 } 395 }; 396 MODULE_DEVICE_TABLE(pci, moxa_pcibrds); 397 #endif /* CONFIG_PCI */ 398 399 struct moxa_port; 400 401 static struct moxa_board_conf { 402 int boardType; 403 int numPorts; 404 int busType; 405 406 unsigned int ready; 407 408 struct moxa_port *ports; 409 410 void __iomem *basemem; 411 void __iomem *intNdx; 412 void __iomem *intPend; 413 void __iomem *intTable; 414 } moxa_boards[MAX_BOARDS]; 415 416 struct mxser_mstatus { 417 tcflag_t cflag; 418 int cts; 419 int dsr; 420 int ri; 421 int dcd; 422 }; 423 424 struct moxaq_str { 425 int inq; 426 int outq; 427 }; 428 429 struct moxa_port { 430 struct tty_port port; 431 struct moxa_board_conf *board; 432 void __iomem *tableAddr; 433 434 int type; 435 int cflag; 436 unsigned long statusflags; 437 438 u8 DCDState; /* Protected by the port lock */ 439 u8 lineCtrl; 440 u8 lowChkFlag; 441 }; 442 443 struct mon_str { 444 int tick; 445 int rxcnt[MAX_PORTS]; 446 int txcnt[MAX_PORTS]; 447 }; 448 449 /* statusflags */ 450 #define TXSTOPPED 1 451 #define LOWWAIT 2 452 #define EMPTYWAIT 3 453 454 455 #define WAKEUP_CHARS 256 456 457 static int ttymajor = MOXAMAJOR; 458 static struct mon_str moxaLog; 459 static unsigned int moxaFuncTout = HZ / 2; 460 static unsigned int moxaLowWaterChk; 461 static DEFINE_MUTEX(moxa_openlock); 462 static DEFINE_SPINLOCK(moxa_lock); 463 464 static unsigned long baseaddr[MAX_BOARDS]; 465 static unsigned int type[MAX_BOARDS]; 466 static unsigned int numports[MAX_BOARDS]; 467 static struct tty_port moxa_service_port; 468 469 MODULE_AUTHOR("William Chen"); 470 MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver"); 471 MODULE_LICENSE("GPL"); 472 MODULE_FIRMWARE("c218tunx.cod"); 473 MODULE_FIRMWARE("cp204unx.cod"); 474 MODULE_FIRMWARE("c320tunx.cod"); 475 476 module_param_array(type, uint, NULL, 0); 477 MODULE_PARM_DESC(type, "card type: C218=2, C320=4"); 478 module_param_hw_array(baseaddr, ulong, ioport, NULL, 0); 479 MODULE_PARM_DESC(baseaddr, "base address"); 480 module_param_array(numports, uint, NULL, 0); 481 MODULE_PARM_DESC(numports, "numports (ignored for C218)"); 482 483 module_param(ttymajor, int, 0); 484 485 /* 486 * static functions: 487 */ 488 static int moxa_open(struct tty_struct *, struct file *); 489 static void moxa_close(struct tty_struct *, struct file *); 490 static ssize_t moxa_write(struct tty_struct *, const u8 *, size_t); 491 static unsigned int moxa_write_room(struct tty_struct *); 492 static void moxa_flush_buffer(struct tty_struct *); 493 static unsigned int moxa_chars_in_buffer(struct tty_struct *); 494 static void moxa_set_termios(struct tty_struct *, const struct ktermios *); 495 static void moxa_stop(struct tty_struct *); 496 static void moxa_start(struct tty_struct *); 497 static void moxa_hangup(struct tty_struct *); 498 static int moxa_tiocmget(struct tty_struct *tty); 499 static int moxa_tiocmset(struct tty_struct *tty, 500 unsigned int set, unsigned int clear); 501 static void moxa_poll(struct timer_list *); 502 static void moxa_set_tty_param(struct tty_struct *, const struct ktermios *); 503 static void moxa_shutdown(struct tty_port *); 504 static bool moxa_carrier_raised(struct tty_port *); 505 static void moxa_dtr_rts(struct tty_port *, bool); 506 /* 507 * moxa board interface functions: 508 */ 509 static void MoxaPortEnable(struct moxa_port *); 510 static void MoxaPortDisable(struct moxa_port *); 511 static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t); 512 static int MoxaPortGetLineOut(struct moxa_port *, bool *, bool *); 513 static void MoxaPortLineCtrl(struct moxa_port *, bool, bool); 514 static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int); 515 static int MoxaPortLineStatus(struct moxa_port *); 516 static void MoxaPortFlushData(struct moxa_port *, int); 517 static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int); 518 static int MoxaPortReadData(struct moxa_port *); 519 static unsigned int MoxaPortTxQueue(struct moxa_port *); 520 static int MoxaPortRxQueue(struct moxa_port *); 521 static unsigned int MoxaPortTxFree(struct moxa_port *); 522 static void MoxaPortTxDisable(struct moxa_port *); 523 static void MoxaPortTxEnable(struct moxa_port *); 524 static int moxa_get_serial_info(struct tty_struct *, struct serial_struct *); 525 static int moxa_set_serial_info(struct tty_struct *, struct serial_struct *); 526 static void MoxaSetFifo(struct moxa_port *port, int enable); 527 528 /* 529 * I/O functions 530 */ 531 532 static DEFINE_SPINLOCK(moxafunc_lock); 533 534 static void moxa_wait_finish(void __iomem *ofsAddr) 535 { 536 unsigned long end = jiffies + moxaFuncTout; 537 538 while (readw(ofsAddr + FuncCode) != 0) 539 if (time_after(jiffies, end)) 540 return; 541 if (readw(ofsAddr + FuncCode) != 0) 542 printk_ratelimited(KERN_WARNING "moxa function expired\n"); 543 } 544 545 static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg) 546 { 547 unsigned long flags; 548 spin_lock_irqsave(&moxafunc_lock, flags); 549 writew(arg, ofsAddr + FuncArg); 550 writew(cmd, ofsAddr + FuncCode); 551 moxa_wait_finish(ofsAddr); 552 spin_unlock_irqrestore(&moxafunc_lock, flags); 553 } 554 555 static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg) 556 { 557 unsigned long flags; 558 u16 ret; 559 spin_lock_irqsave(&moxafunc_lock, flags); 560 writew(arg, ofsAddr + FuncArg); 561 writew(cmd, ofsAddr + FuncCode); 562 moxa_wait_finish(ofsAddr); 563 ret = readw(ofsAddr + FuncArg); 564 spin_unlock_irqrestore(&moxafunc_lock, flags); 565 return ret; 566 } 567 568 static void moxa_low_water_check(void __iomem *ofsAddr) 569 { 570 u16 rptr, wptr, mask, len; 571 572 if (readb(ofsAddr + FlagStat) & Xoff_state) { 573 rptr = readw(ofsAddr + RXrptr); 574 wptr = readw(ofsAddr + RXwptr); 575 mask = readw(ofsAddr + RX_mask); 576 len = (wptr - rptr) & mask; 577 if (len <= Low_water) 578 moxafunc(ofsAddr, FC_SendXon, 0); 579 } 580 } 581 582 /* 583 * TTY operations 584 */ 585 586 static int moxa_ioctl(struct tty_struct *tty, 587 unsigned int cmd, unsigned long arg) 588 { 589 struct moxa_port *ch = tty->driver_data; 590 void __user *argp = (void __user *)arg; 591 int status, ret = 0; 592 593 if (tty->index == MAX_PORTS) { 594 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE && 595 cmd != MOXA_GETMSTATUS) 596 return -EINVAL; 597 } else if (!ch) 598 return -ENODEV; 599 600 switch (cmd) { 601 case MOXA_GETDATACOUNT: 602 moxaLog.tick = jiffies; 603 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog))) 604 ret = -EFAULT; 605 break; 606 case MOXA_FLUSH_QUEUE: 607 MoxaPortFlushData(ch, arg); 608 break; 609 case MOXA_GET_IOQUEUE: { 610 struct moxaq_str __user *argm = argp; 611 struct moxaq_str tmp; 612 struct moxa_port *p; 613 unsigned int i, j; 614 615 for (i = 0; i < MAX_BOARDS; i++) { 616 p = moxa_boards[i].ports; 617 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) { 618 memset(&tmp, 0, sizeof(tmp)); 619 spin_lock_bh(&moxa_lock); 620 if (moxa_boards[i].ready) { 621 tmp.inq = MoxaPortRxQueue(p); 622 tmp.outq = MoxaPortTxQueue(p); 623 } 624 spin_unlock_bh(&moxa_lock); 625 if (copy_to_user(argm, &tmp, sizeof(tmp))) 626 return -EFAULT; 627 } 628 } 629 break; 630 } case MOXA_GET_OQUEUE: 631 status = MoxaPortTxQueue(ch); 632 ret = put_user(status, (unsigned long __user *)argp); 633 break; 634 case MOXA_GET_IQUEUE: 635 status = MoxaPortRxQueue(ch); 636 ret = put_user(status, (unsigned long __user *)argp); 637 break; 638 case MOXA_GETMSTATUS: { 639 struct mxser_mstatus __user *argm = argp; 640 struct mxser_mstatus tmp; 641 struct moxa_port *p; 642 unsigned int i, j; 643 644 for (i = 0; i < MAX_BOARDS; i++) { 645 p = moxa_boards[i].ports; 646 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) { 647 struct tty_struct *ttyp; 648 memset(&tmp, 0, sizeof(tmp)); 649 spin_lock_bh(&moxa_lock); 650 if (!moxa_boards[i].ready) { 651 spin_unlock_bh(&moxa_lock); 652 goto copy; 653 } 654 655 status = MoxaPortLineStatus(p); 656 spin_unlock_bh(&moxa_lock); 657 658 if (status & 1) 659 tmp.cts = 1; 660 if (status & 2) 661 tmp.dsr = 1; 662 if (status & 4) 663 tmp.dcd = 1; 664 665 ttyp = tty_port_tty_get(&p->port); 666 if (!ttyp) 667 tmp.cflag = p->cflag; 668 else 669 tmp.cflag = ttyp->termios.c_cflag; 670 tty_kref_put(ttyp); 671 copy: 672 if (copy_to_user(argm, &tmp, sizeof(tmp))) 673 return -EFAULT; 674 } 675 } 676 break; 677 } 678 default: 679 ret = -ENOIOCTLCMD; 680 } 681 return ret; 682 } 683 684 static int moxa_break_ctl(struct tty_struct *tty, int state) 685 { 686 struct moxa_port *port = tty->driver_data; 687 688 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak, 689 Magic_code); 690 return 0; 691 } 692 693 static const struct tty_operations moxa_ops = { 694 .open = moxa_open, 695 .close = moxa_close, 696 .write = moxa_write, 697 .write_room = moxa_write_room, 698 .flush_buffer = moxa_flush_buffer, 699 .chars_in_buffer = moxa_chars_in_buffer, 700 .ioctl = moxa_ioctl, 701 .set_termios = moxa_set_termios, 702 .stop = moxa_stop, 703 .start = moxa_start, 704 .hangup = moxa_hangup, 705 .break_ctl = moxa_break_ctl, 706 .tiocmget = moxa_tiocmget, 707 .tiocmset = moxa_tiocmset, 708 .set_serial = moxa_set_serial_info, 709 .get_serial = moxa_get_serial_info, 710 }; 711 712 static const struct tty_port_operations moxa_port_ops = { 713 .carrier_raised = moxa_carrier_raised, 714 .dtr_rts = moxa_dtr_rts, 715 .shutdown = moxa_shutdown, 716 }; 717 718 static struct tty_driver *moxaDriver; 719 static DEFINE_TIMER(moxaTimer, moxa_poll); 720 721 /* 722 * HW init 723 */ 724 725 static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model) 726 { 727 switch (brd->boardType) { 728 case MOXA_BOARD_C218_ISA: 729 case MOXA_BOARD_C218_PCI: 730 if (model != 1) 731 goto err; 732 break; 733 case MOXA_BOARD_CP204J: 734 if (model != 3) 735 goto err; 736 break; 737 default: 738 if (model != 2) 739 goto err; 740 break; 741 } 742 return 0; 743 err: 744 return -EINVAL; 745 } 746 747 static int moxa_check_fw(const void *ptr) 748 { 749 const __le16 *lptr = ptr; 750 751 if (*lptr != cpu_to_le16(0x7980)) 752 return -EINVAL; 753 754 return 0; 755 } 756 757 static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf, 758 size_t len) 759 { 760 void __iomem *baseAddr = brd->basemem; 761 u16 tmp; 762 763 writeb(HW_reset, baseAddr + Control_reg); /* reset */ 764 msleep(10); 765 memset_io(baseAddr, 0, 4096); 766 memcpy_toio(baseAddr, buf, len); /* download BIOS */ 767 writeb(0, baseAddr + Control_reg); /* restart */ 768 769 msleep(2000); 770 771 switch (brd->boardType) { 772 case MOXA_BOARD_C218_ISA: 773 case MOXA_BOARD_C218_PCI: 774 tmp = readw(baseAddr + C218_key); 775 if (tmp != C218_KeyCode) 776 goto err; 777 break; 778 case MOXA_BOARD_CP204J: 779 tmp = readw(baseAddr + C218_key); 780 if (tmp != CP204J_KeyCode) 781 goto err; 782 break; 783 default: 784 tmp = readw(baseAddr + C320_key); 785 if (tmp != C320_KeyCode) 786 goto err; 787 tmp = readw(baseAddr + C320_status); 788 if (tmp != STS_init) { 789 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic " 790 "module not found\n"); 791 return -EIO; 792 } 793 break; 794 } 795 796 return 0; 797 err: 798 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n"); 799 return -EIO; 800 } 801 802 static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr, 803 size_t len) 804 { 805 void __iomem *baseAddr = brd->basemem; 806 807 if (len < 7168) { 808 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n"); 809 return -EINVAL; 810 } 811 812 writew(len - 7168 - 2, baseAddr + C320bapi_len); 813 writeb(1, baseAddr + Control_reg); /* Select Page 1 */ 814 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168); 815 writeb(2, baseAddr + Control_reg); /* Select Page 2 */ 816 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168); 817 818 return 0; 819 } 820 821 static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr, 822 size_t len) 823 { 824 void __iomem *baseAddr = brd->basemem; 825 const __le16 *uptr = ptr; 826 size_t wlen, len2, j; 827 unsigned long key, loadbuf, loadlen, checksum, checksum_ok; 828 unsigned int i, retry; 829 u16 usum, keycode; 830 831 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode : 832 C218_KeyCode; 833 834 switch (brd->boardType) { 835 case MOXA_BOARD_CP204J: 836 case MOXA_BOARD_C218_ISA: 837 case MOXA_BOARD_C218_PCI: 838 key = C218_key; 839 loadbuf = C218_LoadBuf; 840 loadlen = C218DLoad_len; 841 checksum = C218check_sum; 842 checksum_ok = C218chksum_ok; 843 break; 844 default: 845 key = C320_key; 846 keycode = C320_KeyCode; 847 loadbuf = C320_LoadBuf; 848 loadlen = C320DLoad_len; 849 checksum = C320check_sum; 850 checksum_ok = C320chksum_ok; 851 break; 852 } 853 854 usum = 0; 855 wlen = len >> 1; 856 for (i = 0; i < wlen; i++) 857 usum += le16_to_cpu(uptr[i]); 858 retry = 0; 859 do { 860 wlen = len >> 1; 861 j = 0; 862 while (wlen) { 863 len2 = (wlen > 2048) ? 2048 : wlen; 864 wlen -= len2; 865 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1); 866 j += len2 << 1; 867 868 writew(len2, baseAddr + loadlen); 869 writew(0, baseAddr + key); 870 for (i = 0; i < 100; i++) { 871 if (readw(baseAddr + key) == keycode) 872 break; 873 msleep(10); 874 } 875 if (readw(baseAddr + key) != keycode) 876 return -EIO; 877 } 878 writew(0, baseAddr + loadlen); 879 writew(usum, baseAddr + checksum); 880 writew(0, baseAddr + key); 881 for (i = 0; i < 100; i++) { 882 if (readw(baseAddr + key) == keycode) 883 break; 884 msleep(10); 885 } 886 retry++; 887 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3)); 888 if (readb(baseAddr + checksum_ok) != 1) 889 return -EIO; 890 891 writew(0, baseAddr + key); 892 for (i = 0; i < 600; i++) { 893 if (readw(baseAddr + Magic_no) == Magic_code) 894 break; 895 msleep(10); 896 } 897 if (readw(baseAddr + Magic_no) != Magic_code) 898 return -EIO; 899 900 if (MOXA_IS_320(brd)) { 901 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */ 902 writew(0x3800, baseAddr + TMS320_PORT1); 903 writew(0x3900, baseAddr + TMS320_PORT2); 904 writew(28499, baseAddr + TMS320_CLOCK); 905 } else { 906 writew(0x3200, baseAddr + TMS320_PORT1); 907 writew(0x3400, baseAddr + TMS320_PORT2); 908 writew(19999, baseAddr + TMS320_CLOCK); 909 } 910 } 911 writew(1, baseAddr + Disable_IRQ); 912 writew(0, baseAddr + Magic_no); 913 for (i = 0; i < 500; i++) { 914 if (readw(baseAddr + Magic_no) == Magic_code) 915 break; 916 msleep(10); 917 } 918 if (readw(baseAddr + Magic_no) != Magic_code) 919 return -EIO; 920 921 if (MOXA_IS_320(brd)) { 922 j = readw(baseAddr + Module_cnt); 923 if (j <= 0) 924 return -EIO; 925 brd->numPorts = j * 8; 926 writew(j, baseAddr + Module_no); 927 writew(0, baseAddr + Magic_no); 928 for (i = 0; i < 600; i++) { 929 if (readw(baseAddr + Magic_no) == Magic_code) 930 break; 931 msleep(10); 932 } 933 if (readw(baseAddr + Magic_no) != Magic_code) 934 return -EIO; 935 } 936 brd->intNdx = baseAddr + IRQindex; 937 brd->intPend = baseAddr + IRQpending; 938 brd->intTable = baseAddr + IRQtable; 939 940 return 0; 941 } 942 943 static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr, 944 size_t len) 945 { 946 void __iomem *ofsAddr, *baseAddr = brd->basemem; 947 struct moxa_port *port; 948 int retval, i; 949 950 if (len % 2) { 951 printk(KERN_ERR "MOXA: bios length is not even\n"); 952 return -EINVAL; 953 } 954 955 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */ 956 if (retval) 957 return retval; 958 959 switch (brd->boardType) { 960 case MOXA_BOARD_C218_ISA: 961 case MOXA_BOARD_C218_PCI: 962 case MOXA_BOARD_CP204J: 963 port = brd->ports; 964 for (i = 0; i < brd->numPorts; i++, port++) { 965 port->board = brd; 966 port->DCDState = 0; 967 port->tableAddr = baseAddr + Extern_table + 968 Extern_size * i; 969 ofsAddr = port->tableAddr; 970 writew(C218rx_mask, ofsAddr + RX_mask); 971 writew(C218tx_mask, ofsAddr + TX_mask); 972 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb); 973 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb); 974 975 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb); 976 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb); 977 978 } 979 break; 980 default: 981 port = brd->ports; 982 for (i = 0; i < brd->numPorts; i++, port++) { 983 port->board = brd; 984 port->DCDState = 0; 985 port->tableAddr = baseAddr + Extern_table + 986 Extern_size * i; 987 ofsAddr = port->tableAddr; 988 switch (brd->numPorts) { 989 case 8: 990 writew(C320p8rx_mask, ofsAddr + RX_mask); 991 writew(C320p8tx_mask, ofsAddr + TX_mask); 992 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb); 993 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb); 994 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb); 995 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb); 996 997 break; 998 case 16: 999 writew(C320p16rx_mask, ofsAddr + RX_mask); 1000 writew(C320p16tx_mask, ofsAddr + TX_mask); 1001 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb); 1002 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb); 1003 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb); 1004 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb); 1005 break; 1006 1007 case 24: 1008 writew(C320p24rx_mask, ofsAddr + RX_mask); 1009 writew(C320p24tx_mask, ofsAddr + TX_mask); 1010 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb); 1011 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb); 1012 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb); 1013 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb); 1014 break; 1015 case 32: 1016 writew(C320p32rx_mask, ofsAddr + RX_mask); 1017 writew(C320p32tx_mask, ofsAddr + TX_mask); 1018 writew(C320p32tx_ofs, ofsAddr + Ofs_txb); 1019 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb); 1020 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb); 1021 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb); 1022 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb); 1023 break; 1024 } 1025 } 1026 break; 1027 } 1028 return 0; 1029 } 1030 1031 static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw) 1032 { 1033 const void *ptr = fw->data; 1034 char rsn[64]; 1035 u16 lens[5]; 1036 size_t len; 1037 unsigned int a, lenp, lencnt; 1038 int ret = -EINVAL; 1039 struct { 1040 __le32 magic; /* 0x34303430 */ 1041 u8 reserved1[2]; 1042 u8 type; /* UNIX = 3 */ 1043 u8 model; /* C218T=1, C320T=2, CP204=3 */ 1044 u8 reserved2[8]; 1045 __le16 len[5]; 1046 } const *hdr = ptr; 1047 1048 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens)); 1049 1050 if (fw->size < MOXA_FW_HDRLEN) { 1051 strcpy(rsn, "too short (even header won't fit)"); 1052 goto err; 1053 } 1054 if (hdr->magic != cpu_to_le32(0x30343034)) { 1055 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic)); 1056 goto err; 1057 } 1058 if (hdr->type != 3) { 1059 sprintf(rsn, "not for linux, type is %u", hdr->type); 1060 goto err; 1061 } 1062 if (moxa_check_fw_model(brd, hdr->model)) { 1063 sprintf(rsn, "not for this card, model is %u", hdr->model); 1064 goto err; 1065 } 1066 1067 len = MOXA_FW_HDRLEN; 1068 lencnt = hdr->model == 2 ? 5 : 3; 1069 for (a = 0; a < ARRAY_SIZE(lens); a++) { 1070 lens[a] = le16_to_cpu(hdr->len[a]); 1071 if (lens[a] && len + lens[a] <= fw->size && 1072 moxa_check_fw(&fw->data[len])) 1073 printk(KERN_WARNING "MOXA firmware: unexpected input " 1074 "at offset %u, but going on\n", (u32)len); 1075 if (!lens[a] && a < lencnt) { 1076 sprintf(rsn, "too few entries in fw file"); 1077 goto err; 1078 } 1079 len += lens[a]; 1080 } 1081 1082 if (len != fw->size) { 1083 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size, 1084 (u32)len); 1085 goto err; 1086 } 1087 1088 ptr += MOXA_FW_HDRLEN; 1089 lenp = 0; /* bios */ 1090 1091 strcpy(rsn, "read above"); 1092 1093 ret = moxa_load_bios(brd, ptr, lens[lenp]); 1094 if (ret) 1095 goto err; 1096 1097 /* we skip the tty section (lens[1]), since we don't need it */ 1098 ptr += lens[lenp] + lens[lenp + 1]; 1099 lenp += 2; /* comm */ 1100 1101 if (hdr->model == 2) { 1102 ret = moxa_load_320b(brd, ptr, lens[lenp]); 1103 if (ret) 1104 goto err; 1105 /* skip another tty */ 1106 ptr += lens[lenp] + lens[lenp + 1]; 1107 lenp += 2; 1108 } 1109 1110 ret = moxa_load_code(brd, ptr, lens[lenp]); 1111 if (ret) 1112 goto err; 1113 1114 return 0; 1115 err: 1116 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn); 1117 return ret; 1118 } 1119 1120 static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev) 1121 { 1122 const struct firmware *fw; 1123 const char *file; 1124 struct moxa_port *p; 1125 unsigned int i, first_idx; 1126 int ret; 1127 1128 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports), 1129 GFP_KERNEL); 1130 if (brd->ports == NULL) { 1131 printk(KERN_ERR "cannot allocate memory for ports\n"); 1132 ret = -ENOMEM; 1133 goto err; 1134 } 1135 1136 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) { 1137 tty_port_init(&p->port); 1138 p->port.ops = &moxa_port_ops; 1139 p->type = PORT_16550A; 1140 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; 1141 } 1142 1143 switch (brd->boardType) { 1144 case MOXA_BOARD_C218_ISA: 1145 case MOXA_BOARD_C218_PCI: 1146 file = "c218tunx.cod"; 1147 break; 1148 case MOXA_BOARD_CP204J: 1149 file = "cp204unx.cod"; 1150 break; 1151 default: 1152 file = "c320tunx.cod"; 1153 break; 1154 } 1155 1156 ret = request_firmware(&fw, file, dev); 1157 if (ret) { 1158 printk(KERN_ERR "MOXA: request_firmware failed. Make sure " 1159 "you've placed '%s' file into your firmware " 1160 "loader directory (e.g. /lib/firmware)\n", 1161 file); 1162 goto err_free; 1163 } 1164 1165 ret = moxa_load_fw(brd, fw); 1166 1167 release_firmware(fw); 1168 1169 if (ret) 1170 goto err_free; 1171 1172 spin_lock_bh(&moxa_lock); 1173 brd->ready = 1; 1174 if (!timer_pending(&moxaTimer)) 1175 mod_timer(&moxaTimer, jiffies + HZ / 50); 1176 spin_unlock_bh(&moxa_lock); 1177 1178 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD; 1179 for (i = 0; i < brd->numPorts; i++) 1180 tty_port_register_device(&brd->ports[i].port, moxaDriver, 1181 first_idx + i, dev); 1182 1183 return 0; 1184 err_free: 1185 for (i = 0; i < MAX_PORTS_PER_BOARD; i++) 1186 tty_port_destroy(&brd->ports[i].port); 1187 kfree(brd->ports); 1188 err: 1189 return ret; 1190 } 1191 1192 static void moxa_board_deinit(struct moxa_board_conf *brd) 1193 { 1194 unsigned int a, opened, first_idx; 1195 1196 mutex_lock(&moxa_openlock); 1197 spin_lock_bh(&moxa_lock); 1198 brd->ready = 0; 1199 spin_unlock_bh(&moxa_lock); 1200 1201 /* pci hot-un-plug support */ 1202 for (a = 0; a < brd->numPorts; a++) 1203 if (tty_port_initialized(&brd->ports[a].port)) 1204 tty_port_tty_hangup(&brd->ports[a].port, false); 1205 1206 for (a = 0; a < MAX_PORTS_PER_BOARD; a++) 1207 tty_port_destroy(&brd->ports[a].port); 1208 1209 while (1) { 1210 opened = 0; 1211 for (a = 0; a < brd->numPorts; a++) 1212 if (tty_port_initialized(&brd->ports[a].port)) 1213 opened++; 1214 mutex_unlock(&moxa_openlock); 1215 if (!opened) 1216 break; 1217 msleep(50); 1218 mutex_lock(&moxa_openlock); 1219 } 1220 1221 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD; 1222 for (a = 0; a < brd->numPorts; a++) 1223 tty_unregister_device(moxaDriver, first_idx + a); 1224 1225 iounmap(brd->basemem); 1226 brd->basemem = NULL; 1227 kfree(brd->ports); 1228 } 1229 1230 #ifdef CONFIG_PCI 1231 static int moxa_pci_probe(struct pci_dev *pdev, 1232 const struct pci_device_id *ent) 1233 { 1234 struct moxa_board_conf *board; 1235 unsigned int i; 1236 int board_type = ent->driver_data; 1237 int retval; 1238 1239 retval = pci_enable_device(pdev); 1240 if (retval) { 1241 dev_err(&pdev->dev, "can't enable pci device\n"); 1242 goto err; 1243 } 1244 1245 for (i = 0; i < MAX_BOARDS; i++) 1246 if (moxa_boards[i].basemem == NULL) 1247 break; 1248 1249 retval = -ENODEV; 1250 if (i >= MAX_BOARDS) { 1251 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards " 1252 "found. Board is ignored.\n", MAX_BOARDS); 1253 goto err; 1254 } 1255 1256 board = &moxa_boards[i]; 1257 1258 retval = pci_request_region(pdev, 2, "moxa-base"); 1259 if (retval) { 1260 dev_err(&pdev->dev, "can't request pci region 2\n"); 1261 goto err; 1262 } 1263 1264 board->basemem = ioremap(pci_resource_start(pdev, 2), 0x4000); 1265 if (board->basemem == NULL) { 1266 dev_err(&pdev->dev, "can't remap io space 2\n"); 1267 retval = -ENOMEM; 1268 goto err_reg; 1269 } 1270 1271 board->boardType = board_type; 1272 switch (board_type) { 1273 case MOXA_BOARD_C218_ISA: 1274 case MOXA_BOARD_C218_PCI: 1275 board->numPorts = 8; 1276 break; 1277 1278 case MOXA_BOARD_CP204J: 1279 board->numPorts = 4; 1280 break; 1281 default: 1282 board->numPorts = 0; 1283 break; 1284 } 1285 board->busType = MOXA_BUS_TYPE_PCI; 1286 1287 retval = moxa_init_board(board, &pdev->dev); 1288 if (retval) 1289 goto err_base; 1290 1291 pci_set_drvdata(pdev, board); 1292 1293 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n", 1294 moxa_brdname[board_type - 1], board->numPorts); 1295 1296 return 0; 1297 err_base: 1298 iounmap(board->basemem); 1299 board->basemem = NULL; 1300 err_reg: 1301 pci_release_region(pdev, 2); 1302 err: 1303 return retval; 1304 } 1305 1306 static void moxa_pci_remove(struct pci_dev *pdev) 1307 { 1308 struct moxa_board_conf *brd = pci_get_drvdata(pdev); 1309 1310 moxa_board_deinit(brd); 1311 1312 pci_release_region(pdev, 2); 1313 } 1314 1315 static struct pci_driver moxa_pci_driver = { 1316 .name = "moxa", 1317 .id_table = moxa_pcibrds, 1318 .probe = moxa_pci_probe, 1319 .remove = moxa_pci_remove 1320 }; 1321 #endif /* CONFIG_PCI */ 1322 1323 static int __init moxa_init(void) 1324 { 1325 unsigned int isabrds = 0; 1326 int retval = 0; 1327 struct moxa_board_conf *brd = moxa_boards; 1328 unsigned int i; 1329 1330 printk(KERN_INFO "MOXA Intellio family driver version %s\n", 1331 MOXA_VERSION); 1332 1333 tty_port_init(&moxa_service_port); 1334 1335 moxaDriver = tty_alloc_driver(MAX_PORTS + 1, 1336 TTY_DRIVER_REAL_RAW | 1337 TTY_DRIVER_DYNAMIC_DEV); 1338 if (IS_ERR(moxaDriver)) 1339 return PTR_ERR(moxaDriver); 1340 1341 moxaDriver->name = "ttyMX"; 1342 moxaDriver->major = ttymajor; 1343 moxaDriver->minor_start = 0; 1344 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL; 1345 moxaDriver->subtype = SERIAL_TYPE_NORMAL; 1346 moxaDriver->init_termios = tty_std_termios; 1347 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; 1348 moxaDriver->init_termios.c_ispeed = 9600; 1349 moxaDriver->init_termios.c_ospeed = 9600; 1350 tty_set_operations(moxaDriver, &moxa_ops); 1351 /* Having one more port only for ioctls is ugly */ 1352 tty_port_link_device(&moxa_service_port, moxaDriver, MAX_PORTS); 1353 1354 if (tty_register_driver(moxaDriver)) { 1355 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n"); 1356 tty_driver_kref_put(moxaDriver); 1357 return -1; 1358 } 1359 1360 /* Find the boards defined from module args. */ 1361 1362 for (i = 0; i < MAX_BOARDS; i++) { 1363 if (!baseaddr[i]) 1364 break; 1365 if (type[i] == MOXA_BOARD_C218_ISA || 1366 type[i] == MOXA_BOARD_C320_ISA) { 1367 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n", 1368 isabrds + 1, moxa_brdname[type[i] - 1], 1369 baseaddr[i]); 1370 brd->boardType = type[i]; 1371 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 : 1372 numports[i]; 1373 brd->busType = MOXA_BUS_TYPE_ISA; 1374 brd->basemem = ioremap(baseaddr[i], 0x4000); 1375 if (!brd->basemem) { 1376 printk(KERN_ERR "MOXA: can't remap %lx\n", 1377 baseaddr[i]); 1378 continue; 1379 } 1380 if (moxa_init_board(brd, NULL)) { 1381 iounmap(brd->basemem); 1382 brd->basemem = NULL; 1383 continue; 1384 } 1385 1386 printk(KERN_INFO "MOXA isa board found at 0x%.8lx and " 1387 "ready (%u ports, firmware loaded)\n", 1388 baseaddr[i], brd->numPorts); 1389 1390 brd++; 1391 isabrds++; 1392 } 1393 } 1394 1395 #ifdef CONFIG_PCI 1396 retval = pci_register_driver(&moxa_pci_driver); 1397 if (retval) { 1398 printk(KERN_ERR "Can't register MOXA pci driver!\n"); 1399 if (isabrds) 1400 retval = 0; 1401 } 1402 #endif 1403 1404 return retval; 1405 } 1406 1407 static void __exit moxa_exit(void) 1408 { 1409 unsigned int i; 1410 1411 #ifdef CONFIG_PCI 1412 pci_unregister_driver(&moxa_pci_driver); 1413 #endif 1414 1415 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */ 1416 if (moxa_boards[i].ready) 1417 moxa_board_deinit(&moxa_boards[i]); 1418 1419 del_timer_sync(&moxaTimer); 1420 1421 tty_unregister_driver(moxaDriver); 1422 tty_driver_kref_put(moxaDriver); 1423 } 1424 1425 module_init(moxa_init); 1426 module_exit(moxa_exit); 1427 1428 static void moxa_shutdown(struct tty_port *port) 1429 { 1430 struct moxa_port *ch = container_of(port, struct moxa_port, port); 1431 MoxaPortDisable(ch); 1432 MoxaPortFlushData(ch, 2); 1433 } 1434 1435 static bool moxa_carrier_raised(struct tty_port *port) 1436 { 1437 struct moxa_port *ch = container_of(port, struct moxa_port, port); 1438 int dcd; 1439 1440 spin_lock_irq(&port->lock); 1441 dcd = ch->DCDState; 1442 spin_unlock_irq(&port->lock); 1443 return dcd; 1444 } 1445 1446 static void moxa_dtr_rts(struct tty_port *port, bool active) 1447 { 1448 struct moxa_port *ch = container_of(port, struct moxa_port, port); 1449 MoxaPortLineCtrl(ch, active, active); 1450 } 1451 1452 1453 static int moxa_open(struct tty_struct *tty, struct file *filp) 1454 { 1455 struct moxa_board_conf *brd; 1456 struct moxa_port *ch; 1457 int port; 1458 1459 port = tty->index; 1460 if (port == MAX_PORTS) { 1461 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM; 1462 } 1463 if (mutex_lock_interruptible(&moxa_openlock)) 1464 return -ERESTARTSYS; 1465 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD]; 1466 if (!brd->ready) { 1467 mutex_unlock(&moxa_openlock); 1468 return -ENODEV; 1469 } 1470 1471 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) { 1472 mutex_unlock(&moxa_openlock); 1473 return -ENODEV; 1474 } 1475 1476 ch = &brd->ports[port % MAX_PORTS_PER_BOARD]; 1477 ch->port.count++; 1478 tty->driver_data = ch; 1479 tty_port_tty_set(&ch->port, tty); 1480 mutex_lock(&ch->port.mutex); 1481 if (!tty_port_initialized(&ch->port)) { 1482 ch->statusflags = 0; 1483 moxa_set_tty_param(tty, &tty->termios); 1484 MoxaPortLineCtrl(ch, true, true); 1485 MoxaPortEnable(ch); 1486 MoxaSetFifo(ch, ch->type == PORT_16550A); 1487 tty_port_set_initialized(&ch->port, true); 1488 } 1489 mutex_unlock(&ch->port.mutex); 1490 mutex_unlock(&moxa_openlock); 1491 1492 return tty_port_block_til_ready(&ch->port, tty, filp); 1493 } 1494 1495 static void moxa_close(struct tty_struct *tty, struct file *filp) 1496 { 1497 struct moxa_port *ch = tty->driver_data; 1498 ch->cflag = tty->termios.c_cflag; 1499 tty_port_close(&ch->port, tty, filp); 1500 } 1501 1502 static ssize_t moxa_write(struct tty_struct *tty, const u8 *buf, size_t count) 1503 { 1504 struct moxa_port *ch = tty->driver_data; 1505 unsigned long flags; 1506 int len; 1507 1508 if (ch == NULL) 1509 return 0; 1510 1511 spin_lock_irqsave(&moxa_lock, flags); 1512 len = MoxaPortWriteData(tty, buf, count); 1513 spin_unlock_irqrestore(&moxa_lock, flags); 1514 1515 set_bit(LOWWAIT, &ch->statusflags); 1516 return len; 1517 } 1518 1519 static unsigned int moxa_write_room(struct tty_struct *tty) 1520 { 1521 struct moxa_port *ch; 1522 1523 if (tty->flow.stopped) 1524 return 0; 1525 ch = tty->driver_data; 1526 if (ch == NULL) 1527 return 0; 1528 return MoxaPortTxFree(ch); 1529 } 1530 1531 static void moxa_flush_buffer(struct tty_struct *tty) 1532 { 1533 struct moxa_port *ch = tty->driver_data; 1534 1535 if (ch == NULL) 1536 return; 1537 MoxaPortFlushData(ch, 1); 1538 tty_wakeup(tty); 1539 } 1540 1541 static unsigned int moxa_chars_in_buffer(struct tty_struct *tty) 1542 { 1543 struct moxa_port *ch = tty->driver_data; 1544 unsigned int chars; 1545 1546 chars = MoxaPortTxQueue(ch); 1547 if (chars) 1548 /* 1549 * Make it possible to wakeup anything waiting for output 1550 * in tty_ioctl.c, etc. 1551 */ 1552 set_bit(EMPTYWAIT, &ch->statusflags); 1553 return chars; 1554 } 1555 1556 static int moxa_tiocmget(struct tty_struct *tty) 1557 { 1558 struct moxa_port *ch = tty->driver_data; 1559 bool dtr_active, rts_active; 1560 int flag = 0; 1561 int status; 1562 1563 MoxaPortGetLineOut(ch, &dtr_active, &rts_active); 1564 if (dtr_active) 1565 flag |= TIOCM_DTR; 1566 if (rts_active) 1567 flag |= TIOCM_RTS; 1568 status = MoxaPortLineStatus(ch); 1569 if (status & 1) 1570 flag |= TIOCM_CTS; 1571 if (status & 2) 1572 flag |= TIOCM_DSR; 1573 if (status & 4) 1574 flag |= TIOCM_CD; 1575 return flag; 1576 } 1577 1578 static int moxa_tiocmset(struct tty_struct *tty, 1579 unsigned int set, unsigned int clear) 1580 { 1581 bool dtr_active, rts_active; 1582 struct moxa_port *ch; 1583 1584 mutex_lock(&moxa_openlock); 1585 ch = tty->driver_data; 1586 if (!ch) { 1587 mutex_unlock(&moxa_openlock); 1588 return -EINVAL; 1589 } 1590 1591 MoxaPortGetLineOut(ch, &dtr_active, &rts_active); 1592 if (set & TIOCM_RTS) 1593 rts_active = true; 1594 if (set & TIOCM_DTR) 1595 dtr_active = true; 1596 if (clear & TIOCM_RTS) 1597 rts_active = false; 1598 if (clear & TIOCM_DTR) 1599 dtr_active = false; 1600 MoxaPortLineCtrl(ch, dtr_active, rts_active); 1601 mutex_unlock(&moxa_openlock); 1602 return 0; 1603 } 1604 1605 static void moxa_set_termios(struct tty_struct *tty, 1606 const struct ktermios *old_termios) 1607 { 1608 struct moxa_port *ch = tty->driver_data; 1609 1610 if (ch == NULL) 1611 return; 1612 moxa_set_tty_param(tty, old_termios); 1613 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty)) 1614 wake_up_interruptible(&ch->port.open_wait); 1615 } 1616 1617 static void moxa_stop(struct tty_struct *tty) 1618 { 1619 struct moxa_port *ch = tty->driver_data; 1620 1621 if (ch == NULL) 1622 return; 1623 MoxaPortTxDisable(ch); 1624 set_bit(TXSTOPPED, &ch->statusflags); 1625 } 1626 1627 1628 static void moxa_start(struct tty_struct *tty) 1629 { 1630 struct moxa_port *ch = tty->driver_data; 1631 1632 if (ch == NULL) 1633 return; 1634 1635 if (!test_bit(TXSTOPPED, &ch->statusflags)) 1636 return; 1637 1638 MoxaPortTxEnable(ch); 1639 clear_bit(TXSTOPPED, &ch->statusflags); 1640 } 1641 1642 static void moxa_hangup(struct tty_struct *tty) 1643 { 1644 struct moxa_port *ch = tty->driver_data; 1645 tty_port_hangup(&ch->port); 1646 } 1647 1648 static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd) 1649 { 1650 unsigned long flags; 1651 dcd = !!dcd; 1652 1653 spin_lock_irqsave(&p->port.lock, flags); 1654 if (dcd != p->DCDState) { 1655 p->DCDState = dcd; 1656 spin_unlock_irqrestore(&p->port.lock, flags); 1657 if (!dcd) 1658 tty_port_tty_hangup(&p->port, true); 1659 } 1660 else 1661 spin_unlock_irqrestore(&p->port.lock, flags); 1662 } 1663 1664 static int moxa_poll_port(struct moxa_port *p, unsigned int handle, 1665 u16 __iomem *ip) 1666 { 1667 struct tty_struct *tty = tty_port_tty_get(&p->port); 1668 bool inited = tty_port_initialized(&p->port); 1669 void __iomem *ofsAddr; 1670 u16 intr; 1671 1672 if (tty) { 1673 if (test_bit(EMPTYWAIT, &p->statusflags) && 1674 MoxaPortTxQueue(p) == 0) { 1675 clear_bit(EMPTYWAIT, &p->statusflags); 1676 tty_wakeup(tty); 1677 } 1678 if (test_bit(LOWWAIT, &p->statusflags) && !tty->flow.stopped && 1679 MoxaPortTxQueue(p) <= WAKEUP_CHARS) { 1680 clear_bit(LOWWAIT, &p->statusflags); 1681 tty_wakeup(tty); 1682 } 1683 1684 if (inited && !tty_throttled(tty) && 1685 MoxaPortRxQueue(p) > 0) { /* RX */ 1686 MoxaPortReadData(p); 1687 tty_flip_buffer_push(&p->port); 1688 } 1689 } else { 1690 clear_bit(EMPTYWAIT, &p->statusflags); 1691 MoxaPortFlushData(p, 0); /* flush RX */ 1692 } 1693 1694 if (!handle) /* nothing else to do */ 1695 goto put; 1696 1697 intr = readw(ip); /* port irq status */ 1698 if (intr == 0) 1699 goto put; 1700 1701 writew(0, ip); /* ACK port */ 1702 ofsAddr = p->tableAddr; 1703 if (intr & IntrTx) /* disable tx intr */ 1704 writew(readw(ofsAddr + HostStat) & ~WakeupTx, 1705 ofsAddr + HostStat); 1706 1707 if (!inited) 1708 goto put; 1709 1710 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */ 1711 tty_insert_flip_char(&p->port, 0, TTY_BREAK); 1712 tty_flip_buffer_push(&p->port); 1713 } 1714 1715 if (intr & IntrLine) 1716 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state); 1717 put: 1718 tty_kref_put(tty); 1719 1720 return 0; 1721 } 1722 1723 static void moxa_poll(struct timer_list *unused) 1724 { 1725 struct moxa_board_conf *brd; 1726 u16 __iomem *ip; 1727 unsigned int card, port, served = 0; 1728 1729 spin_lock(&moxa_lock); 1730 for (card = 0; card < MAX_BOARDS; card++) { 1731 brd = &moxa_boards[card]; 1732 if (!brd->ready) 1733 continue; 1734 1735 served++; 1736 1737 ip = NULL; 1738 if (readb(brd->intPend) == 0xff) 1739 ip = brd->intTable + readb(brd->intNdx); 1740 1741 for (port = 0; port < brd->numPorts; port++) 1742 moxa_poll_port(&brd->ports[port], !!ip, ip + port); 1743 1744 if (ip) 1745 writeb(0, brd->intPend); /* ACK */ 1746 1747 if (moxaLowWaterChk) { 1748 struct moxa_port *p = brd->ports; 1749 for (port = 0; port < brd->numPorts; port++, p++) 1750 if (p->lowChkFlag) { 1751 p->lowChkFlag = 0; 1752 moxa_low_water_check(p->tableAddr); 1753 } 1754 } 1755 } 1756 moxaLowWaterChk = 0; 1757 1758 if (served) 1759 mod_timer(&moxaTimer, jiffies + HZ / 50); 1760 spin_unlock(&moxa_lock); 1761 } 1762 1763 /******************************************************************************/ 1764 1765 static void moxa_set_tty_param(struct tty_struct *tty, 1766 const struct ktermios *old_termios) 1767 { 1768 register struct ktermios *ts = &tty->termios; 1769 struct moxa_port *ch = tty->driver_data; 1770 int rts, cts, txflow, rxflow, xany, baud; 1771 1772 rts = cts = txflow = rxflow = xany = 0; 1773 if (ts->c_cflag & CRTSCTS) 1774 rts = cts = 1; 1775 if (ts->c_iflag & IXON) 1776 txflow = 1; 1777 if (ts->c_iflag & IXOFF) 1778 rxflow = 1; 1779 if (ts->c_iflag & IXANY) 1780 xany = 1; 1781 1782 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany); 1783 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty)); 1784 if (baud == -1) 1785 baud = tty_termios_baud_rate(old_termios); 1786 /* Not put the baud rate into the termios data */ 1787 tty_encode_baud_rate(tty, baud, baud); 1788 } 1789 1790 /***************************************************************************** 1791 * Driver level functions: * 1792 *****************************************************************************/ 1793 1794 static void MoxaPortFlushData(struct moxa_port *port, int mode) 1795 { 1796 void __iomem *ofsAddr; 1797 if (mode < 0 || mode > 2) 1798 return; 1799 ofsAddr = port->tableAddr; 1800 moxafunc(ofsAddr, FC_FlushQueue, mode); 1801 if (mode != 1) { 1802 port->lowChkFlag = 0; 1803 moxa_low_water_check(ofsAddr); 1804 } 1805 } 1806 1807 /* 1808 * Moxa Port Number Description: 1809 * 1810 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And, 1811 * the port number using in MOXA driver functions will be 0 to 31 for 1812 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96 1813 * to 127 for fourth. For example, if you setup three MOXA boards, 1814 * first board is C218, second board is C320-16 and third board is 1815 * C320-32. The port number of first board (C218 - 8 ports) is from 1816 * 0 to 7. The port number of second board (C320 - 16 ports) is form 1817 * 32 to 47. The port number of third board (C320 - 32 ports) is from 1818 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to 1819 * 127 will be invalid. 1820 * 1821 * 1822 * Moxa Functions Description: 1823 * 1824 * Function 1: Driver initialization routine, this routine must be 1825 * called when initialized driver. 1826 * Syntax: 1827 * void MoxaDriverInit(); 1828 * 1829 * 1830 * Function 2: Moxa driver private IOCTL command processing. 1831 * Syntax: 1832 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port); 1833 * 1834 * unsigned int cmd : IOCTL command 1835 * unsigned long arg : IOCTL argument 1836 * int port : port number (0 - 127) 1837 * 1838 * return: 0 (OK) 1839 * -EINVAL 1840 * -ENOIOCTLCMD 1841 * 1842 * 1843 * Function 6: Enable this port to start Tx/Rx data. 1844 * Syntax: 1845 * void MoxaPortEnable(int port); 1846 * int port : port number (0 - 127) 1847 * 1848 * 1849 * Function 7: Disable this port 1850 * Syntax: 1851 * void MoxaPortDisable(int port); 1852 * int port : port number (0 - 127) 1853 * 1854 * 1855 * Function 10: Setting baud rate of this port. 1856 * Syntax: 1857 * speed_t MoxaPortSetBaud(int port, speed_t baud); 1858 * int port : port number (0 - 127) 1859 * long baud : baud rate (50 - 115200) 1860 * 1861 * return: 0 : this port is invalid or baud < 50 1862 * 50 - 115200 : the real baud rate set to the port, if 1863 * the argument baud is large than maximun 1864 * available baud rate, the real setting 1865 * baud rate will be the maximun baud rate. 1866 * 1867 * 1868 * Function 12: Configure the port. 1869 * Syntax: 1870 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud); 1871 * int port : port number (0 - 127) 1872 * struct ktermios * termio : termio structure pointer 1873 * speed_t baud : baud rate 1874 * 1875 * return: -1 : this port is invalid or termio == NULL 1876 * 0 : setting O.K. 1877 * 1878 * 1879 * Function 13: Get the DTR/RTS state of this port. 1880 * Syntax: 1881 * int MoxaPortGetLineOut(int port, bool *dtrState, bool *rtsState); 1882 * int port : port number (0 - 127) 1883 * bool * dtr_active : pointer to bool to receive the current DTR 1884 * state. (if NULL, this function will not 1885 * write to this address) 1886 * bool * rts_active : pointer to bool to receive the current RTS 1887 * state. (if NULL, this function will not 1888 * write to this address) 1889 * 1890 * return: -1 : this port is invalid 1891 * 0 : O.K. 1892 * 1893 * 1894 * Function 14: Setting the DTR/RTS output state of this port. 1895 * Syntax: 1896 * void MoxaPortLineCtrl(int port, bool dtrState, bool rtsState); 1897 * int port : port number (0 - 127) 1898 * bool dtr_active : DTR output state 1899 * bool rts_active : RTS output state 1900 * 1901 * 1902 * Function 15: Setting the flow control of this port. 1903 * Syntax: 1904 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow, 1905 * int txFlow,int xany); 1906 * int port : port number (0 - 127) 1907 * int rtsFlow : H/W RTS flow control (0: no, 1: yes) 1908 * int ctsFlow : H/W CTS flow control (0: no, 1: yes) 1909 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes) 1910 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes) 1911 * int xany : S/W XANY flow control (0: no, 1: yes) 1912 * 1913 * 1914 * Function 16: Get ths line status of this port 1915 * Syntax: 1916 * int MoxaPortLineStatus(int port); 1917 * int port : port number (0 - 127) 1918 * 1919 * return: Bit 0 - CTS state (0: off, 1: on) 1920 * Bit 1 - DSR state (0: off, 1: on) 1921 * Bit 2 - DCD state (0: off, 1: on) 1922 * 1923 * 1924 * Function 19: Flush the Rx/Tx buffer data of this port. 1925 * Syntax: 1926 * void MoxaPortFlushData(int port, int mode); 1927 * int port : port number (0 - 127) 1928 * int mode 1929 * 0 : flush the Rx buffer 1930 * 1 : flush the Tx buffer 1931 * 2 : flush the Rx and Tx buffer 1932 * 1933 * 1934 * Function 20: Write data. 1935 * Syntax: 1936 * int MoxaPortWriteData(int port, unsigned char * buffer, int length); 1937 * int port : port number (0 - 127) 1938 * unsigned char * buffer : pointer to write data buffer. 1939 * int length : write data length 1940 * 1941 * return: 0 - length : real write data length 1942 * 1943 * 1944 * Function 21: Read data. 1945 * Syntax: 1946 * int MoxaPortReadData(int port, struct tty_struct *tty); 1947 * int port : port number (0 - 127) 1948 * struct tty_struct *tty : tty for data 1949 * 1950 * return: 0 - length : real read data length 1951 * 1952 * 1953 * Function 24: Get the Tx buffer current queued data bytes 1954 * Syntax: 1955 * int MoxaPortTxQueue(int port); 1956 * int port : port number (0 - 127) 1957 * 1958 * return: .. : Tx buffer current queued data bytes 1959 * 1960 * 1961 * Function 25: Get the Tx buffer current free space 1962 * Syntax: 1963 * int MoxaPortTxFree(int port); 1964 * int port : port number (0 - 127) 1965 * 1966 * return: .. : Tx buffer current free space 1967 * 1968 * 1969 * Function 26: Get the Rx buffer current queued data bytes 1970 * Syntax: 1971 * int MoxaPortRxQueue(int port); 1972 * int port : port number (0 - 127) 1973 * 1974 * return: .. : Rx buffer current queued data bytes 1975 * 1976 * 1977 * Function 28: Disable port data transmission. 1978 * Syntax: 1979 * void MoxaPortTxDisable(int port); 1980 * int port : port number (0 - 127) 1981 * 1982 * 1983 * Function 29: Enable port data transmission. 1984 * Syntax: 1985 * void MoxaPortTxEnable(int port); 1986 * int port : port number (0 - 127) 1987 * 1988 * 1989 * Function 31: Get the received BREAK signal count and reset it. 1990 * Syntax: 1991 * int MoxaPortResetBrkCnt(int port); 1992 * int port : port number (0 - 127) 1993 * 1994 * return: 0 - .. : BREAK signal count 1995 * 1996 * 1997 */ 1998 1999 static void MoxaPortEnable(struct moxa_port *port) 2000 { 2001 void __iomem *ofsAddr; 2002 u16 lowwater = 512; 2003 2004 ofsAddr = port->tableAddr; 2005 writew(lowwater, ofsAddr + Low_water); 2006 if (MOXA_IS_320(port->board)) 2007 moxafunc(ofsAddr, FC_SetBreakIrq, 0); 2008 else 2009 writew(readw(ofsAddr + HostStat) | WakeupBreak, 2010 ofsAddr + HostStat); 2011 2012 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code); 2013 moxafunc(ofsAddr, FC_FlushQueue, 2); 2014 2015 moxafunc(ofsAddr, FC_EnableCH, Magic_code); 2016 MoxaPortLineStatus(port); 2017 } 2018 2019 static void MoxaPortDisable(struct moxa_port *port) 2020 { 2021 void __iomem *ofsAddr = port->tableAddr; 2022 2023 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */ 2024 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code); 2025 writew(0, ofsAddr + HostStat); 2026 moxafunc(ofsAddr, FC_DisableCH, Magic_code); 2027 } 2028 2029 static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud) 2030 { 2031 void __iomem *ofsAddr = port->tableAddr; 2032 unsigned int clock, val; 2033 speed_t max; 2034 2035 max = MOXA_IS_320(port->board) ? 460800 : 921600; 2036 if (baud < 50) 2037 return 0; 2038 if (baud > max) 2039 baud = max; 2040 clock = 921600; 2041 val = clock / baud; 2042 moxafunc(ofsAddr, FC_SetBaud, val); 2043 baud = clock / val; 2044 return baud; 2045 } 2046 2047 static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio, 2048 speed_t baud) 2049 { 2050 void __iomem *ofsAddr; 2051 tcflag_t mode = 0; 2052 2053 ofsAddr = port->tableAddr; 2054 2055 mode = termio->c_cflag & CSIZE; 2056 if (mode == CS5) 2057 mode = MX_CS5; 2058 else if (mode == CS6) 2059 mode = MX_CS6; 2060 else if (mode == CS7) 2061 mode = MX_CS7; 2062 else if (mode == CS8) 2063 mode = MX_CS8; 2064 2065 if (termio->c_cflag & CSTOPB) { 2066 if (mode == MX_CS5) 2067 mode |= MX_STOP15; 2068 else 2069 mode |= MX_STOP2; 2070 } else 2071 mode |= MX_STOP1; 2072 2073 if (termio->c_cflag & PARENB) { 2074 if (termio->c_cflag & PARODD) { 2075 if (termio->c_cflag & CMSPAR) 2076 mode |= MX_PARMARK; 2077 else 2078 mode |= MX_PARODD; 2079 } else { 2080 if (termio->c_cflag & CMSPAR) 2081 mode |= MX_PARSPACE; 2082 else 2083 mode |= MX_PAREVEN; 2084 } 2085 } else 2086 mode |= MX_PARNONE; 2087 2088 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode); 2089 2090 if (MOXA_IS_320(port->board) && baud >= 921600) 2091 return -1; 2092 2093 baud = MoxaPortSetBaud(port, baud); 2094 2095 if (termio->c_iflag & (IXON | IXOFF | IXANY)) { 2096 spin_lock_irq(&moxafunc_lock); 2097 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg); 2098 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1); 2099 writeb(FC_SetXonXoff, ofsAddr + FuncCode); 2100 moxa_wait_finish(ofsAddr); 2101 spin_unlock_irq(&moxafunc_lock); 2102 2103 } 2104 return baud; 2105 } 2106 2107 static int MoxaPortGetLineOut(struct moxa_port *port, bool *dtr_active, 2108 bool *rts_active) 2109 { 2110 if (dtr_active) 2111 *dtr_active = port->lineCtrl & DTR_ON; 2112 if (rts_active) 2113 *rts_active = port->lineCtrl & RTS_ON; 2114 2115 return 0; 2116 } 2117 2118 static void MoxaPortLineCtrl(struct moxa_port *port, bool dtr_active, bool rts_active) 2119 { 2120 u8 mode = 0; 2121 2122 if (dtr_active) 2123 mode |= DTR_ON; 2124 if (rts_active) 2125 mode |= RTS_ON; 2126 port->lineCtrl = mode; 2127 moxafunc(port->tableAddr, FC_LineControl, mode); 2128 } 2129 2130 static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts, 2131 int txflow, int rxflow, int txany) 2132 { 2133 int mode = 0; 2134 2135 if (rts) 2136 mode |= RTS_FlowCtl; 2137 if (cts) 2138 mode |= CTS_FlowCtl; 2139 if (txflow) 2140 mode |= Tx_FlowCtl; 2141 if (rxflow) 2142 mode |= Rx_FlowCtl; 2143 if (txany) 2144 mode |= IXM_IXANY; 2145 moxafunc(port->tableAddr, FC_SetFlowCtl, mode); 2146 } 2147 2148 static int MoxaPortLineStatus(struct moxa_port *port) 2149 { 2150 void __iomem *ofsAddr; 2151 int val; 2152 2153 ofsAddr = port->tableAddr; 2154 if (MOXA_IS_320(port->board)) 2155 val = moxafuncret(ofsAddr, FC_LineStatus, 0); 2156 else 2157 val = readw(ofsAddr + FlagStat) >> 4; 2158 val &= 0x0B; 2159 if (val & 8) 2160 val |= 4; 2161 moxa_new_dcdstate(port, val & 8); 2162 val &= 7; 2163 return val; 2164 } 2165 2166 static int MoxaPortWriteData(struct tty_struct *tty, const u8 *buffer, int len) 2167 { 2168 struct moxa_port *port = tty->driver_data; 2169 void __iomem *baseAddr, *ofsAddr, *ofs; 2170 unsigned int c, total; 2171 u16 head, tail, tx_mask, spage, epage; 2172 u16 pageno, pageofs, bufhead; 2173 2174 ofsAddr = port->tableAddr; 2175 baseAddr = port->board->basemem; 2176 tx_mask = readw(ofsAddr + TX_mask); 2177 spage = readw(ofsAddr + Page_txb); 2178 epage = readw(ofsAddr + EndPage_txb); 2179 tail = readw(ofsAddr + TXwptr); 2180 head = readw(ofsAddr + TXrptr); 2181 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask); 2182 if (c > len) 2183 c = len; 2184 moxaLog.txcnt[port->port.tty->index] += c; 2185 total = c; 2186 if (spage == epage) { 2187 bufhead = readw(ofsAddr + Ofs_txb); 2188 writew(spage, baseAddr + Control_reg); 2189 while (c > 0) { 2190 if (head > tail) 2191 len = head - tail - 1; 2192 else 2193 len = tx_mask + 1 - tail; 2194 len = (c > len) ? len : c; 2195 ofs = baseAddr + DynPage_addr + bufhead + tail; 2196 memcpy_toio(ofs, buffer, len); 2197 buffer += len; 2198 tail = (tail + len) & tx_mask; 2199 c -= len; 2200 } 2201 } else { 2202 pageno = spage + (tail >> 13); 2203 pageofs = tail & Page_mask; 2204 while (c > 0) { 2205 len = Page_size - pageofs; 2206 if (len > c) 2207 len = c; 2208 writeb(pageno, baseAddr + Control_reg); 2209 ofs = baseAddr + DynPage_addr + pageofs; 2210 memcpy_toio(ofs, buffer, len); 2211 buffer += len; 2212 if (++pageno == epage) 2213 pageno = spage; 2214 pageofs = 0; 2215 c -= len; 2216 } 2217 tail = (tail + total) & tx_mask; 2218 } 2219 writew(tail, ofsAddr + TXwptr); 2220 writeb(1, ofsAddr + CD180TXirq); /* start to send */ 2221 return total; 2222 } 2223 2224 static int MoxaPortReadData(struct moxa_port *port) 2225 { 2226 struct tty_struct *tty = port->port.tty; 2227 unsigned char *dst; 2228 void __iomem *baseAddr, *ofsAddr, *ofs; 2229 unsigned int count, len, total; 2230 u16 tail, rx_mask, spage, epage; 2231 u16 pageno, pageofs, bufhead, head; 2232 2233 ofsAddr = port->tableAddr; 2234 baseAddr = port->board->basemem; 2235 head = readw(ofsAddr + RXrptr); 2236 tail = readw(ofsAddr + RXwptr); 2237 rx_mask = readw(ofsAddr + RX_mask); 2238 spage = readw(ofsAddr + Page_rxb); 2239 epage = readw(ofsAddr + EndPage_rxb); 2240 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1); 2241 if (count == 0) 2242 return 0; 2243 2244 total = count; 2245 moxaLog.rxcnt[tty->index] += total; 2246 if (spage == epage) { 2247 bufhead = readw(ofsAddr + Ofs_rxb); 2248 writew(spage, baseAddr + Control_reg); 2249 while (count > 0) { 2250 ofs = baseAddr + DynPage_addr + bufhead + head; 2251 len = (tail >= head) ? (tail - head) : 2252 (rx_mask + 1 - head); 2253 len = tty_prepare_flip_string(&port->port, &dst, 2254 min(len, count)); 2255 memcpy_fromio(dst, ofs, len); 2256 head = (head + len) & rx_mask; 2257 count -= len; 2258 } 2259 } else { 2260 pageno = spage + (head >> 13); 2261 pageofs = head & Page_mask; 2262 while (count > 0) { 2263 writew(pageno, baseAddr + Control_reg); 2264 ofs = baseAddr + DynPage_addr + pageofs; 2265 len = tty_prepare_flip_string(&port->port, &dst, 2266 min(Page_size - pageofs, count)); 2267 memcpy_fromio(dst, ofs, len); 2268 2269 count -= len; 2270 pageofs = (pageofs + len) & Page_mask; 2271 if (pageofs == 0 && ++pageno == epage) 2272 pageno = spage; 2273 } 2274 head = (head + total) & rx_mask; 2275 } 2276 writew(head, ofsAddr + RXrptr); 2277 if (readb(ofsAddr + FlagStat) & Xoff_state) { 2278 moxaLowWaterChk = 1; 2279 port->lowChkFlag = 1; 2280 } 2281 return total; 2282 } 2283 2284 2285 static unsigned int MoxaPortTxQueue(struct moxa_port *port) 2286 { 2287 void __iomem *ofsAddr = port->tableAddr; 2288 u16 rptr, wptr, mask; 2289 2290 rptr = readw(ofsAddr + TXrptr); 2291 wptr = readw(ofsAddr + TXwptr); 2292 mask = readw(ofsAddr + TX_mask); 2293 return (wptr - rptr) & mask; 2294 } 2295 2296 static unsigned int MoxaPortTxFree(struct moxa_port *port) 2297 { 2298 void __iomem *ofsAddr = port->tableAddr; 2299 u16 rptr, wptr, mask; 2300 2301 rptr = readw(ofsAddr + TXrptr); 2302 wptr = readw(ofsAddr + TXwptr); 2303 mask = readw(ofsAddr + TX_mask); 2304 return mask - ((wptr - rptr) & mask); 2305 } 2306 2307 static int MoxaPortRxQueue(struct moxa_port *port) 2308 { 2309 void __iomem *ofsAddr = port->tableAddr; 2310 u16 rptr, wptr, mask; 2311 2312 rptr = readw(ofsAddr + RXrptr); 2313 wptr = readw(ofsAddr + RXwptr); 2314 mask = readw(ofsAddr + RX_mask); 2315 return (wptr - rptr) & mask; 2316 } 2317 2318 static void MoxaPortTxDisable(struct moxa_port *port) 2319 { 2320 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code); 2321 } 2322 2323 static void MoxaPortTxEnable(struct moxa_port *port) 2324 { 2325 moxafunc(port->tableAddr, FC_SetXonState, Magic_code); 2326 } 2327 2328 static int moxa_get_serial_info(struct tty_struct *tty, 2329 struct serial_struct *ss) 2330 { 2331 struct moxa_port *info = tty->driver_data; 2332 2333 if (tty->index == MAX_PORTS) 2334 return -EINVAL; 2335 if (!info) 2336 return -ENODEV; 2337 mutex_lock(&info->port.mutex); 2338 ss->type = info->type; 2339 ss->line = info->port.tty->index; 2340 ss->flags = info->port.flags; 2341 ss->baud_base = 921600; 2342 ss->close_delay = jiffies_to_msecs(info->port.close_delay) / 10; 2343 mutex_unlock(&info->port.mutex); 2344 return 0; 2345 } 2346 2347 2348 static int moxa_set_serial_info(struct tty_struct *tty, 2349 struct serial_struct *ss) 2350 { 2351 struct moxa_port *info = tty->driver_data; 2352 unsigned int close_delay; 2353 2354 if (tty->index == MAX_PORTS) 2355 return -EINVAL; 2356 if (!info) 2357 return -ENODEV; 2358 2359 close_delay = msecs_to_jiffies(ss->close_delay * 10); 2360 2361 mutex_lock(&info->port.mutex); 2362 if (!capable(CAP_SYS_ADMIN)) { 2363 if (close_delay != info->port.close_delay || 2364 ss->type != info->type || 2365 ((ss->flags & ~ASYNC_USR_MASK) != 2366 (info->port.flags & ~ASYNC_USR_MASK))) { 2367 mutex_unlock(&info->port.mutex); 2368 return -EPERM; 2369 } 2370 } else { 2371 info->port.close_delay = close_delay; 2372 2373 MoxaSetFifo(info, ss->type == PORT_16550A); 2374 2375 info->type = ss->type; 2376 } 2377 mutex_unlock(&info->port.mutex); 2378 return 0; 2379 } 2380 2381 2382 2383 /***************************************************************************** 2384 * Static local functions: * 2385 *****************************************************************************/ 2386 2387 static void MoxaSetFifo(struct moxa_port *port, int enable) 2388 { 2389 void __iomem *ofsAddr = port->tableAddr; 2390 2391 if (!enable) { 2392 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0); 2393 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1); 2394 } else { 2395 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3); 2396 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16); 2397 } 2398 } 2399