1 /* 2 * mxser.c -- MOXA Smartio/Industio family multiport serial driver. 3 * 4 * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com). 5 * Copyright (C) 2006-2008 Jiri Slaby <jirislaby@gmail.com> 6 * 7 * This code is loosely based on the 1.8 moxa driver which is based on 8 * Linux serial driver, written by Linus Torvalds, Theodore T'so and 9 * others. 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox 17 * <alan@lxorguk.ukuu.org.uk>. The original 1.8 code is available on 18 * www.moxa.com. 19 * - Fixed x86_64 cleanness 20 */ 21 22 #include <linux/module.h> 23 #include <linux/errno.h> 24 #include <linux/signal.h> 25 #include <linux/sched.h> 26 #include <linux/timer.h> 27 #include <linux/interrupt.h> 28 #include <linux/tty.h> 29 #include <linux/tty_flip.h> 30 #include <linux/serial.h> 31 #include <linux/serial_reg.h> 32 #include <linux/major.h> 33 #include <linux/string.h> 34 #include <linux/fcntl.h> 35 #include <linux/ptrace.h> 36 #include <linux/ioport.h> 37 #include <linux/mm.h> 38 #include <linux/delay.h> 39 #include <linux/pci.h> 40 #include <linux/bitops.h> 41 #include <linux/slab.h> 42 #include <linux/ratelimit.h> 43 44 #include <asm/system.h> 45 #include <asm/io.h> 46 #include <asm/irq.h> 47 #include <asm/uaccess.h> 48 49 #include "mxser.h" 50 51 #define MXSER_VERSION "2.0.5" /* 1.14 */ 52 #define MXSERMAJOR 174 53 54 #define MXSER_BOARDS 4 /* Max. boards */ 55 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */ 56 #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD) 57 #define MXSER_ISR_PASS_LIMIT 100 58 59 /*CheckIsMoxaMust return value*/ 60 #define MOXA_OTHER_UART 0x00 61 #define MOXA_MUST_MU150_HWID 0x01 62 #define MOXA_MUST_MU860_HWID 0x02 63 64 #define WAKEUP_CHARS 256 65 66 #define UART_MCR_AFE 0x20 67 #define UART_LSR_SPECIAL 0x1E 68 69 #define PCI_DEVICE_ID_POS104UL 0x1044 70 #define PCI_DEVICE_ID_CB108 0x1080 71 #define PCI_DEVICE_ID_CP102UF 0x1023 72 #define PCI_DEVICE_ID_CP112UL 0x1120 73 #define PCI_DEVICE_ID_CB114 0x1142 74 #define PCI_DEVICE_ID_CP114UL 0x1143 75 #define PCI_DEVICE_ID_CB134I 0x1341 76 #define PCI_DEVICE_ID_CP138U 0x1380 77 78 79 #define C168_ASIC_ID 1 80 #define C104_ASIC_ID 2 81 #define C102_ASIC_ID 0xB 82 #define CI132_ASIC_ID 4 83 #define CI134_ASIC_ID 3 84 #define CI104J_ASIC_ID 5 85 86 #define MXSER_HIGHBAUD 1 87 #define MXSER_HAS2 2 88 89 /* This is only for PCI */ 90 static const struct { 91 int type; 92 int tx_fifo; 93 int rx_fifo; 94 int xmit_fifo_size; 95 int rx_high_water; 96 int rx_trigger; 97 int rx_low_water; 98 long max_baud; 99 } Gpci_uart_info[] = { 100 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L}, 101 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L}, 102 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L} 103 }; 104 #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info) 105 106 struct mxser_cardinfo { 107 char *name; 108 unsigned int nports; 109 unsigned int flags; 110 }; 111 112 static const struct mxser_cardinfo mxser_cards[] = { 113 /* 0*/ { "C168 series", 8, }, 114 { "C104 series", 4, }, 115 { "CI-104J series", 4, }, 116 { "C168H/PCI series", 8, }, 117 { "C104H/PCI series", 4, }, 118 /* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */ 119 { "CI-132 series", 4, MXSER_HAS2 }, 120 { "CI-134 series", 4, }, 121 { "CP-132 series", 2, }, 122 { "CP-114 series", 4, }, 123 /*10*/ { "CT-114 series", 4, }, 124 { "CP-102 series", 2, MXSER_HIGHBAUD }, 125 { "CP-104U series", 4, }, 126 { "CP-168U series", 8, }, 127 { "CP-132U series", 2, }, 128 /*15*/ { "CP-134U series", 4, }, 129 { "CP-104JU series", 4, }, 130 { "Moxa UC7000 Serial", 8, }, /* RC7000 */ 131 { "CP-118U series", 8, }, 132 { "CP-102UL series", 2, }, 133 /*20*/ { "CP-102U series", 2, }, 134 { "CP-118EL series", 8, }, 135 { "CP-168EL series", 8, }, 136 { "CP-104EL series", 4, }, 137 { "CB-108 series", 8, }, 138 /*25*/ { "CB-114 series", 4, }, 139 { "CB-134I series", 4, }, 140 { "CP-138U series", 8, }, 141 { "POS-104UL series", 4, }, 142 { "CP-114UL series", 4, }, 143 /*30*/ { "CP-102UF series", 2, }, 144 { "CP-112UL series", 2, }, 145 }; 146 147 /* driver_data correspond to the lines in the structure above 148 see also ISA probe function before you change something */ 149 static struct pci_device_id mxser_pcibrds[] = { 150 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 }, 151 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 }, 152 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 }, 153 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 }, 154 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 }, 155 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 }, 156 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 }, 157 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 }, 158 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 }, 159 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 }, 160 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 }, 161 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 }, 162 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 }, 163 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 }, 164 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 }, 165 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 }, 166 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 }, 167 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 }, 168 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 }, 169 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 }, 170 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 }, 171 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 }, 172 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 }, 173 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 }, 174 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 }, 175 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP112UL), .driver_data = 31 }, 176 { } 177 }; 178 MODULE_DEVICE_TABLE(pci, mxser_pcibrds); 179 180 static unsigned long ioaddr[MXSER_BOARDS]; 181 static int ttymajor = MXSERMAJOR; 182 183 /* Variables for insmod */ 184 185 MODULE_AUTHOR("Casper Yang"); 186 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver"); 187 module_param_array(ioaddr, ulong, NULL, 0); 188 MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board"); 189 module_param(ttymajor, int, 0); 190 MODULE_LICENSE("GPL"); 191 192 struct mxser_log { 193 int tick; 194 unsigned long rxcnt[MXSER_PORTS]; 195 unsigned long txcnt[MXSER_PORTS]; 196 }; 197 198 struct mxser_mon { 199 unsigned long rxcnt; 200 unsigned long txcnt; 201 unsigned long up_rxcnt; 202 unsigned long up_txcnt; 203 int modem_status; 204 unsigned char hold_reason; 205 }; 206 207 struct mxser_mon_ext { 208 unsigned long rx_cnt[32]; 209 unsigned long tx_cnt[32]; 210 unsigned long up_rxcnt[32]; 211 unsigned long up_txcnt[32]; 212 int modem_status[32]; 213 214 long baudrate[32]; 215 int databits[32]; 216 int stopbits[32]; 217 int parity[32]; 218 int flowctrl[32]; 219 int fifo[32]; 220 int iftype[32]; 221 }; 222 223 struct mxser_board; 224 225 struct mxser_port { 226 struct tty_port port; 227 struct mxser_board *board; 228 229 unsigned long ioaddr; 230 unsigned long opmode_ioaddr; 231 int max_baud; 232 233 int rx_high_water; 234 int rx_trigger; /* Rx fifo trigger level */ 235 int rx_low_water; 236 int baud_base; /* max. speed */ 237 int type; /* UART type */ 238 239 int x_char; /* xon/xoff character */ 240 int IER; /* Interrupt Enable Register */ 241 int MCR; /* Modem control register */ 242 243 unsigned char stop_rx; 244 unsigned char ldisc_stop_rx; 245 246 int custom_divisor; 247 unsigned char err_shadow; 248 249 struct async_icount icount; /* kernel counters for 4 input interrupts */ 250 int timeout; 251 252 int read_status_mask; 253 int ignore_status_mask; 254 int xmit_fifo_size; 255 int xmit_head; 256 int xmit_tail; 257 int xmit_cnt; 258 259 struct ktermios normal_termios; 260 261 struct mxser_mon mon_data; 262 263 spinlock_t slock; 264 }; 265 266 struct mxser_board { 267 unsigned int idx; 268 int irq; 269 const struct mxser_cardinfo *info; 270 unsigned long vector; 271 unsigned long vector_mask; 272 273 int chip_flag; 274 int uart_type; 275 276 struct mxser_port ports[MXSER_PORTS_PER_BOARD]; 277 }; 278 279 struct mxser_mstatus { 280 tcflag_t cflag; 281 int cts; 282 int dsr; 283 int ri; 284 int dcd; 285 }; 286 287 static struct mxser_board mxser_boards[MXSER_BOARDS]; 288 static struct tty_driver *mxvar_sdriver; 289 static struct mxser_log mxvar_log; 290 static int mxser_set_baud_method[MXSER_PORTS + 1]; 291 292 static void mxser_enable_must_enchance_mode(unsigned long baseio) 293 { 294 u8 oldlcr; 295 u8 efr; 296 297 oldlcr = inb(baseio + UART_LCR); 298 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 299 300 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 301 efr |= MOXA_MUST_EFR_EFRB_ENABLE; 302 303 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 304 outb(oldlcr, baseio + UART_LCR); 305 } 306 307 #ifdef CONFIG_PCI 308 static void mxser_disable_must_enchance_mode(unsigned long baseio) 309 { 310 u8 oldlcr; 311 u8 efr; 312 313 oldlcr = inb(baseio + UART_LCR); 314 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 315 316 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 317 efr &= ~MOXA_MUST_EFR_EFRB_ENABLE; 318 319 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 320 outb(oldlcr, baseio + UART_LCR); 321 } 322 #endif 323 324 static void mxser_set_must_xon1_value(unsigned long baseio, u8 value) 325 { 326 u8 oldlcr; 327 u8 efr; 328 329 oldlcr = inb(baseio + UART_LCR); 330 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 331 332 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 333 efr &= ~MOXA_MUST_EFR_BANK_MASK; 334 efr |= MOXA_MUST_EFR_BANK0; 335 336 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 337 outb(value, baseio + MOXA_MUST_XON1_REGISTER); 338 outb(oldlcr, baseio + UART_LCR); 339 } 340 341 static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value) 342 { 343 u8 oldlcr; 344 u8 efr; 345 346 oldlcr = inb(baseio + UART_LCR); 347 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 348 349 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 350 efr &= ~MOXA_MUST_EFR_BANK_MASK; 351 efr |= MOXA_MUST_EFR_BANK0; 352 353 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 354 outb(value, baseio + MOXA_MUST_XOFF1_REGISTER); 355 outb(oldlcr, baseio + UART_LCR); 356 } 357 358 static void mxser_set_must_fifo_value(struct mxser_port *info) 359 { 360 u8 oldlcr; 361 u8 efr; 362 363 oldlcr = inb(info->ioaddr + UART_LCR); 364 outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR); 365 366 efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER); 367 efr &= ~MOXA_MUST_EFR_BANK_MASK; 368 efr |= MOXA_MUST_EFR_BANK1; 369 370 outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER); 371 outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER); 372 outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER); 373 outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER); 374 outb(oldlcr, info->ioaddr + UART_LCR); 375 } 376 377 static void mxser_set_must_enum_value(unsigned long baseio, u8 value) 378 { 379 u8 oldlcr; 380 u8 efr; 381 382 oldlcr = inb(baseio + UART_LCR); 383 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 384 385 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 386 efr &= ~MOXA_MUST_EFR_BANK_MASK; 387 efr |= MOXA_MUST_EFR_BANK2; 388 389 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 390 outb(value, baseio + MOXA_MUST_ENUM_REGISTER); 391 outb(oldlcr, baseio + UART_LCR); 392 } 393 394 #ifdef CONFIG_PCI 395 static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId) 396 { 397 u8 oldlcr; 398 u8 efr; 399 400 oldlcr = inb(baseio + UART_LCR); 401 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 402 403 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 404 efr &= ~MOXA_MUST_EFR_BANK_MASK; 405 efr |= MOXA_MUST_EFR_BANK2; 406 407 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 408 *pId = inb(baseio + MOXA_MUST_HWID_REGISTER); 409 outb(oldlcr, baseio + UART_LCR); 410 } 411 #endif 412 413 static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio) 414 { 415 u8 oldlcr; 416 u8 efr; 417 418 oldlcr = inb(baseio + UART_LCR); 419 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 420 421 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 422 efr &= ~MOXA_MUST_EFR_SF_MASK; 423 424 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 425 outb(oldlcr, baseio + UART_LCR); 426 } 427 428 static void mxser_enable_must_tx_software_flow_control(unsigned long baseio) 429 { 430 u8 oldlcr; 431 u8 efr; 432 433 oldlcr = inb(baseio + UART_LCR); 434 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 435 436 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 437 efr &= ~MOXA_MUST_EFR_SF_TX_MASK; 438 efr |= MOXA_MUST_EFR_SF_TX1; 439 440 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 441 outb(oldlcr, baseio + UART_LCR); 442 } 443 444 static void mxser_disable_must_tx_software_flow_control(unsigned long baseio) 445 { 446 u8 oldlcr; 447 u8 efr; 448 449 oldlcr = inb(baseio + UART_LCR); 450 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 451 452 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 453 efr &= ~MOXA_MUST_EFR_SF_TX_MASK; 454 455 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 456 outb(oldlcr, baseio + UART_LCR); 457 } 458 459 static void mxser_enable_must_rx_software_flow_control(unsigned long baseio) 460 { 461 u8 oldlcr; 462 u8 efr; 463 464 oldlcr = inb(baseio + UART_LCR); 465 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 466 467 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 468 efr &= ~MOXA_MUST_EFR_SF_RX_MASK; 469 efr |= MOXA_MUST_EFR_SF_RX1; 470 471 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 472 outb(oldlcr, baseio + UART_LCR); 473 } 474 475 static void mxser_disable_must_rx_software_flow_control(unsigned long baseio) 476 { 477 u8 oldlcr; 478 u8 efr; 479 480 oldlcr = inb(baseio + UART_LCR); 481 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 482 483 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 484 efr &= ~MOXA_MUST_EFR_SF_RX_MASK; 485 486 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 487 outb(oldlcr, baseio + UART_LCR); 488 } 489 490 #ifdef CONFIG_PCI 491 static int __devinit CheckIsMoxaMust(unsigned long io) 492 { 493 u8 oldmcr, hwid; 494 int i; 495 496 outb(0, io + UART_LCR); 497 mxser_disable_must_enchance_mode(io); 498 oldmcr = inb(io + UART_MCR); 499 outb(0, io + UART_MCR); 500 mxser_set_must_xon1_value(io, 0x11); 501 if ((hwid = inb(io + UART_MCR)) != 0) { 502 outb(oldmcr, io + UART_MCR); 503 return MOXA_OTHER_UART; 504 } 505 506 mxser_get_must_hardware_id(io, &hwid); 507 for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */ 508 if (hwid == Gpci_uart_info[i].type) 509 return (int)hwid; 510 } 511 return MOXA_OTHER_UART; 512 } 513 #endif 514 515 static void process_txrx_fifo(struct mxser_port *info) 516 { 517 int i; 518 519 if ((info->type == PORT_16450) || (info->type == PORT_8250)) { 520 info->rx_trigger = 1; 521 info->rx_high_water = 1; 522 info->rx_low_water = 1; 523 info->xmit_fifo_size = 1; 524 } else 525 for (i = 0; i < UART_INFO_NUM; i++) 526 if (info->board->chip_flag == Gpci_uart_info[i].type) { 527 info->rx_trigger = Gpci_uart_info[i].rx_trigger; 528 info->rx_low_water = Gpci_uart_info[i].rx_low_water; 529 info->rx_high_water = Gpci_uart_info[i].rx_high_water; 530 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size; 531 break; 532 } 533 } 534 535 static unsigned char mxser_get_msr(int baseaddr, int mode, int port) 536 { 537 static unsigned char mxser_msr[MXSER_PORTS + 1]; 538 unsigned char status = 0; 539 540 status = inb(baseaddr + UART_MSR); 541 542 mxser_msr[port] &= 0x0F; 543 mxser_msr[port] |= status; 544 status = mxser_msr[port]; 545 if (mode) 546 mxser_msr[port] = 0; 547 548 return status; 549 } 550 551 static int mxser_carrier_raised(struct tty_port *port) 552 { 553 struct mxser_port *mp = container_of(port, struct mxser_port, port); 554 return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0; 555 } 556 557 static void mxser_dtr_rts(struct tty_port *port, int on) 558 { 559 struct mxser_port *mp = container_of(port, struct mxser_port, port); 560 unsigned long flags; 561 562 spin_lock_irqsave(&mp->slock, flags); 563 if (on) 564 outb(inb(mp->ioaddr + UART_MCR) | 565 UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR); 566 else 567 outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS), 568 mp->ioaddr + UART_MCR); 569 spin_unlock_irqrestore(&mp->slock, flags); 570 } 571 572 static int mxser_set_baud(struct tty_struct *tty, long newspd) 573 { 574 struct mxser_port *info = tty->driver_data; 575 int quot = 0, baud; 576 unsigned char cval; 577 578 if (!info->ioaddr) 579 return -1; 580 581 if (newspd > info->max_baud) 582 return -1; 583 584 if (newspd == 134) { 585 quot = 2 * info->baud_base / 269; 586 tty_encode_baud_rate(tty, 134, 134); 587 } else if (newspd) { 588 quot = info->baud_base / newspd; 589 if (quot == 0) 590 quot = 1; 591 baud = info->baud_base/quot; 592 tty_encode_baud_rate(tty, baud, baud); 593 } else { 594 quot = 0; 595 } 596 597 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base); 598 info->timeout += HZ / 50; /* Add .02 seconds of slop */ 599 600 if (quot) { 601 info->MCR |= UART_MCR_DTR; 602 outb(info->MCR, info->ioaddr + UART_MCR); 603 } else { 604 info->MCR &= ~UART_MCR_DTR; 605 outb(info->MCR, info->ioaddr + UART_MCR); 606 return 0; 607 } 608 609 cval = inb(info->ioaddr + UART_LCR); 610 611 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */ 612 613 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */ 614 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */ 615 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */ 616 617 #ifdef BOTHER 618 if (C_BAUD(tty) == BOTHER) { 619 quot = info->baud_base % newspd; 620 quot *= 8; 621 if (quot % newspd > newspd / 2) { 622 quot /= newspd; 623 quot++; 624 } else 625 quot /= newspd; 626 627 mxser_set_must_enum_value(info->ioaddr, quot); 628 } else 629 #endif 630 mxser_set_must_enum_value(info->ioaddr, 0); 631 632 return 0; 633 } 634 635 /* 636 * This routine is called to set the UART divisor registers to match 637 * the specified baud rate for a serial port. 638 */ 639 static int mxser_change_speed(struct tty_struct *tty, 640 struct ktermios *old_termios) 641 { 642 struct mxser_port *info = tty->driver_data; 643 unsigned cflag, cval, fcr; 644 int ret = 0; 645 unsigned char status; 646 647 cflag = tty->termios->c_cflag; 648 if (!info->ioaddr) 649 return ret; 650 651 if (mxser_set_baud_method[tty->index] == 0) 652 mxser_set_baud(tty, tty_get_baud_rate(tty)); 653 654 /* byte size and parity */ 655 switch (cflag & CSIZE) { 656 case CS5: 657 cval = 0x00; 658 break; 659 case CS6: 660 cval = 0x01; 661 break; 662 case CS7: 663 cval = 0x02; 664 break; 665 case CS8: 666 cval = 0x03; 667 break; 668 default: 669 cval = 0x00; 670 break; /* too keep GCC shut... */ 671 } 672 if (cflag & CSTOPB) 673 cval |= 0x04; 674 if (cflag & PARENB) 675 cval |= UART_LCR_PARITY; 676 if (!(cflag & PARODD)) 677 cval |= UART_LCR_EPAR; 678 if (cflag & CMSPAR) 679 cval |= UART_LCR_SPAR; 680 681 if ((info->type == PORT_8250) || (info->type == PORT_16450)) { 682 if (info->board->chip_flag) { 683 fcr = UART_FCR_ENABLE_FIFO; 684 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE; 685 mxser_set_must_fifo_value(info); 686 } else 687 fcr = 0; 688 } else { 689 fcr = UART_FCR_ENABLE_FIFO; 690 if (info->board->chip_flag) { 691 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE; 692 mxser_set_must_fifo_value(info); 693 } else { 694 switch (info->rx_trigger) { 695 case 1: 696 fcr |= UART_FCR_TRIGGER_1; 697 break; 698 case 4: 699 fcr |= UART_FCR_TRIGGER_4; 700 break; 701 case 8: 702 fcr |= UART_FCR_TRIGGER_8; 703 break; 704 default: 705 fcr |= UART_FCR_TRIGGER_14; 706 break; 707 } 708 } 709 } 710 711 /* CTS flow control flag and modem status interrupts */ 712 info->IER &= ~UART_IER_MSI; 713 info->MCR &= ~UART_MCR_AFE; 714 if (cflag & CRTSCTS) { 715 info->port.flags |= ASYNC_CTS_FLOW; 716 info->IER |= UART_IER_MSI; 717 if ((info->type == PORT_16550A) || (info->board->chip_flag)) { 718 info->MCR |= UART_MCR_AFE; 719 } else { 720 status = inb(info->ioaddr + UART_MSR); 721 if (tty->hw_stopped) { 722 if (status & UART_MSR_CTS) { 723 tty->hw_stopped = 0; 724 if (info->type != PORT_16550A && 725 !info->board->chip_flag) { 726 outb(info->IER & ~UART_IER_THRI, 727 info->ioaddr + 728 UART_IER); 729 info->IER |= UART_IER_THRI; 730 outb(info->IER, info->ioaddr + 731 UART_IER); 732 } 733 tty_wakeup(tty); 734 } 735 } else { 736 if (!(status & UART_MSR_CTS)) { 737 tty->hw_stopped = 1; 738 if ((info->type != PORT_16550A) && 739 (!info->board->chip_flag)) { 740 info->IER &= ~UART_IER_THRI; 741 outb(info->IER, info->ioaddr + 742 UART_IER); 743 } 744 } 745 } 746 } 747 } else { 748 info->port.flags &= ~ASYNC_CTS_FLOW; 749 } 750 outb(info->MCR, info->ioaddr + UART_MCR); 751 if (cflag & CLOCAL) { 752 info->port.flags &= ~ASYNC_CHECK_CD; 753 } else { 754 info->port.flags |= ASYNC_CHECK_CD; 755 info->IER |= UART_IER_MSI; 756 } 757 outb(info->IER, info->ioaddr + UART_IER); 758 759 /* 760 * Set up parity check flag 761 */ 762 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; 763 if (I_INPCK(tty)) 764 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE; 765 if (I_BRKINT(tty) || I_PARMRK(tty)) 766 info->read_status_mask |= UART_LSR_BI; 767 768 info->ignore_status_mask = 0; 769 770 if (I_IGNBRK(tty)) { 771 info->ignore_status_mask |= UART_LSR_BI; 772 info->read_status_mask |= UART_LSR_BI; 773 /* 774 * If we're ignore parity and break indicators, ignore 775 * overruns too. (For real raw support). 776 */ 777 if (I_IGNPAR(tty)) { 778 info->ignore_status_mask |= 779 UART_LSR_OE | 780 UART_LSR_PE | 781 UART_LSR_FE; 782 info->read_status_mask |= 783 UART_LSR_OE | 784 UART_LSR_PE | 785 UART_LSR_FE; 786 } 787 } 788 if (info->board->chip_flag) { 789 mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty)); 790 mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty)); 791 if (I_IXON(tty)) { 792 mxser_enable_must_rx_software_flow_control( 793 info->ioaddr); 794 } else { 795 mxser_disable_must_rx_software_flow_control( 796 info->ioaddr); 797 } 798 if (I_IXOFF(tty)) { 799 mxser_enable_must_tx_software_flow_control( 800 info->ioaddr); 801 } else { 802 mxser_disable_must_tx_software_flow_control( 803 info->ioaddr); 804 } 805 } 806 807 808 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */ 809 outb(cval, info->ioaddr + UART_LCR); 810 811 return ret; 812 } 813 814 static void mxser_check_modem_status(struct tty_struct *tty, 815 struct mxser_port *port, int status) 816 { 817 /* update input line counters */ 818 if (status & UART_MSR_TERI) 819 port->icount.rng++; 820 if (status & UART_MSR_DDSR) 821 port->icount.dsr++; 822 if (status & UART_MSR_DDCD) 823 port->icount.dcd++; 824 if (status & UART_MSR_DCTS) 825 port->icount.cts++; 826 port->mon_data.modem_status = status; 827 wake_up_interruptible(&port->port.delta_msr_wait); 828 829 if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) { 830 if (status & UART_MSR_DCD) 831 wake_up_interruptible(&port->port.open_wait); 832 } 833 834 if (port->port.flags & ASYNC_CTS_FLOW) { 835 if (tty->hw_stopped) { 836 if (status & UART_MSR_CTS) { 837 tty->hw_stopped = 0; 838 839 if ((port->type != PORT_16550A) && 840 (!port->board->chip_flag)) { 841 outb(port->IER & ~UART_IER_THRI, 842 port->ioaddr + UART_IER); 843 port->IER |= UART_IER_THRI; 844 outb(port->IER, port->ioaddr + 845 UART_IER); 846 } 847 tty_wakeup(tty); 848 } 849 } else { 850 if (!(status & UART_MSR_CTS)) { 851 tty->hw_stopped = 1; 852 if (port->type != PORT_16550A && 853 !port->board->chip_flag) { 854 port->IER &= ~UART_IER_THRI; 855 outb(port->IER, port->ioaddr + 856 UART_IER); 857 } 858 } 859 } 860 } 861 } 862 863 static int mxser_activate(struct tty_port *port, struct tty_struct *tty) 864 { 865 struct mxser_port *info = container_of(port, struct mxser_port, port); 866 unsigned long page; 867 unsigned long flags; 868 869 page = __get_free_page(GFP_KERNEL); 870 if (!page) 871 return -ENOMEM; 872 873 spin_lock_irqsave(&info->slock, flags); 874 875 if (!info->ioaddr || !info->type) { 876 set_bit(TTY_IO_ERROR, &tty->flags); 877 free_page(page); 878 spin_unlock_irqrestore(&info->slock, flags); 879 return 0; 880 } 881 info->port.xmit_buf = (unsigned char *) page; 882 883 /* 884 * Clear the FIFO buffers and disable them 885 * (they will be reenabled in mxser_change_speed()) 886 */ 887 if (info->board->chip_flag) 888 outb((UART_FCR_CLEAR_RCVR | 889 UART_FCR_CLEAR_XMIT | 890 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR); 891 else 892 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), 893 info->ioaddr + UART_FCR); 894 895 /* 896 * At this point there's no way the LSR could still be 0xFF; 897 * if it is, then bail out, because there's likely no UART 898 * here. 899 */ 900 if (inb(info->ioaddr + UART_LSR) == 0xff) { 901 spin_unlock_irqrestore(&info->slock, flags); 902 if (capable(CAP_SYS_ADMIN)) { 903 set_bit(TTY_IO_ERROR, &tty->flags); 904 return 0; 905 } else 906 return -ENODEV; 907 } 908 909 /* 910 * Clear the interrupt registers. 911 */ 912 (void) inb(info->ioaddr + UART_LSR); 913 (void) inb(info->ioaddr + UART_RX); 914 (void) inb(info->ioaddr + UART_IIR); 915 (void) inb(info->ioaddr + UART_MSR); 916 917 /* 918 * Now, initialize the UART 919 */ 920 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */ 921 info->MCR = UART_MCR_DTR | UART_MCR_RTS; 922 outb(info->MCR, info->ioaddr + UART_MCR); 923 924 /* 925 * Finally, enable interrupts 926 */ 927 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI; 928 929 if (info->board->chip_flag) 930 info->IER |= MOXA_MUST_IER_EGDAI; 931 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */ 932 933 /* 934 * And clear the interrupt registers again for luck. 935 */ 936 (void) inb(info->ioaddr + UART_LSR); 937 (void) inb(info->ioaddr + UART_RX); 938 (void) inb(info->ioaddr + UART_IIR); 939 (void) inb(info->ioaddr + UART_MSR); 940 941 clear_bit(TTY_IO_ERROR, &tty->flags); 942 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; 943 944 /* 945 * and set the speed of the serial port 946 */ 947 mxser_change_speed(tty, NULL); 948 spin_unlock_irqrestore(&info->slock, flags); 949 950 return 0; 951 } 952 953 /* 954 * This routine will shutdown a serial port 955 */ 956 static void mxser_shutdown_port(struct tty_port *port) 957 { 958 struct mxser_port *info = container_of(port, struct mxser_port, port); 959 unsigned long flags; 960 961 spin_lock_irqsave(&info->slock, flags); 962 963 /* 964 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq 965 * here so the queue might never be waken up 966 */ 967 wake_up_interruptible(&info->port.delta_msr_wait); 968 969 /* 970 * Free the xmit buffer, if necessary 971 */ 972 if (info->port.xmit_buf) { 973 free_page((unsigned long) info->port.xmit_buf); 974 info->port.xmit_buf = NULL; 975 } 976 977 info->IER = 0; 978 outb(0x00, info->ioaddr + UART_IER); 979 980 /* clear Rx/Tx FIFO's */ 981 if (info->board->chip_flag) 982 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | 983 MOXA_MUST_FCR_GDA_MODE_ENABLE, 984 info->ioaddr + UART_FCR); 985 else 986 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT, 987 info->ioaddr + UART_FCR); 988 989 /* read data port to reset things */ 990 (void) inb(info->ioaddr + UART_RX); 991 992 993 if (info->board->chip_flag) 994 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr); 995 996 spin_unlock_irqrestore(&info->slock, flags); 997 } 998 999 /* 1000 * This routine is called whenever a serial port is opened. It 1001 * enables interrupts for a serial port, linking in its async structure into 1002 * the IRQ chain. It also performs the serial-specific 1003 * initialization for the tty structure. 1004 */ 1005 static int mxser_open(struct tty_struct *tty, struct file *filp) 1006 { 1007 struct mxser_port *info; 1008 int line; 1009 1010 line = tty->index; 1011 if (line == MXSER_PORTS) 1012 return 0; 1013 if (line < 0 || line > MXSER_PORTS) 1014 return -ENODEV; 1015 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD]; 1016 if (!info->ioaddr) 1017 return -ENODEV; 1018 1019 tty->driver_data = info; 1020 return tty_port_open(&info->port, tty, filp); 1021 } 1022 1023 static void mxser_flush_buffer(struct tty_struct *tty) 1024 { 1025 struct mxser_port *info = tty->driver_data; 1026 char fcr; 1027 unsigned long flags; 1028 1029 1030 spin_lock_irqsave(&info->slock, flags); 1031 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; 1032 1033 fcr = inb(info->ioaddr + UART_FCR); 1034 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), 1035 info->ioaddr + UART_FCR); 1036 outb(fcr, info->ioaddr + UART_FCR); 1037 1038 spin_unlock_irqrestore(&info->slock, flags); 1039 1040 tty_wakeup(tty); 1041 } 1042 1043 1044 static void mxser_close_port(struct tty_port *port) 1045 { 1046 struct mxser_port *info = container_of(port, struct mxser_port, port); 1047 unsigned long timeout; 1048 /* 1049 * At this point we stop accepting input. To do this, we 1050 * disable the receive line status interrupts, and tell the 1051 * interrupt driver to stop checking the data ready bit in the 1052 * line status register. 1053 */ 1054 info->IER &= ~UART_IER_RLSI; 1055 if (info->board->chip_flag) 1056 info->IER &= ~MOXA_MUST_RECV_ISR; 1057 1058 outb(info->IER, info->ioaddr + UART_IER); 1059 /* 1060 * Before we drop DTR, make sure the UART transmitter 1061 * has completely drained; this is especially 1062 * important if there is a transmit FIFO! 1063 */ 1064 timeout = jiffies + HZ; 1065 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) { 1066 schedule_timeout_interruptible(5); 1067 if (time_after(jiffies, timeout)) 1068 break; 1069 } 1070 } 1071 1072 /* 1073 * This routine is called when the serial port gets closed. First, we 1074 * wait for the last remaining data to be sent. Then, we unlink its 1075 * async structure from the interrupt chain if necessary, and we free 1076 * that IRQ if nothing is left in the chain. 1077 */ 1078 static void mxser_close(struct tty_struct *tty, struct file *filp) 1079 { 1080 struct mxser_port *info = tty->driver_data; 1081 struct tty_port *port = &info->port; 1082 1083 if (tty->index == MXSER_PORTS || info == NULL) 1084 return; 1085 if (tty_port_close_start(port, tty, filp) == 0) 1086 return; 1087 mutex_lock(&port->mutex); 1088 mxser_close_port(port); 1089 mxser_flush_buffer(tty); 1090 mxser_shutdown_port(port); 1091 clear_bit(ASYNCB_INITIALIZED, &port->flags); 1092 mutex_unlock(&port->mutex); 1093 /* Right now the tty_port set is done outside of the close_end helper 1094 as we don't yet have everyone using refcounts */ 1095 tty_port_close_end(port, tty); 1096 tty_port_tty_set(port, NULL); 1097 } 1098 1099 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count) 1100 { 1101 int c, total = 0; 1102 struct mxser_port *info = tty->driver_data; 1103 unsigned long flags; 1104 1105 if (!info->port.xmit_buf) 1106 return 0; 1107 1108 while (1) { 1109 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, 1110 SERIAL_XMIT_SIZE - info->xmit_head)); 1111 if (c <= 0) 1112 break; 1113 1114 memcpy(info->port.xmit_buf + info->xmit_head, buf, c); 1115 spin_lock_irqsave(&info->slock, flags); 1116 info->xmit_head = (info->xmit_head + c) & 1117 (SERIAL_XMIT_SIZE - 1); 1118 info->xmit_cnt += c; 1119 spin_unlock_irqrestore(&info->slock, flags); 1120 1121 buf += c; 1122 count -= c; 1123 total += c; 1124 } 1125 1126 if (info->xmit_cnt && !tty->stopped) { 1127 if (!tty->hw_stopped || 1128 (info->type == PORT_16550A) || 1129 (info->board->chip_flag)) { 1130 spin_lock_irqsave(&info->slock, flags); 1131 outb(info->IER & ~UART_IER_THRI, info->ioaddr + 1132 UART_IER); 1133 info->IER |= UART_IER_THRI; 1134 outb(info->IER, info->ioaddr + UART_IER); 1135 spin_unlock_irqrestore(&info->slock, flags); 1136 } 1137 } 1138 return total; 1139 } 1140 1141 static int mxser_put_char(struct tty_struct *tty, unsigned char ch) 1142 { 1143 struct mxser_port *info = tty->driver_data; 1144 unsigned long flags; 1145 1146 if (!info->port.xmit_buf) 1147 return 0; 1148 1149 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) 1150 return 0; 1151 1152 spin_lock_irqsave(&info->slock, flags); 1153 info->port.xmit_buf[info->xmit_head++] = ch; 1154 info->xmit_head &= SERIAL_XMIT_SIZE - 1; 1155 info->xmit_cnt++; 1156 spin_unlock_irqrestore(&info->slock, flags); 1157 if (!tty->stopped) { 1158 if (!tty->hw_stopped || 1159 (info->type == PORT_16550A) || 1160 info->board->chip_flag) { 1161 spin_lock_irqsave(&info->slock, flags); 1162 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); 1163 info->IER |= UART_IER_THRI; 1164 outb(info->IER, info->ioaddr + UART_IER); 1165 spin_unlock_irqrestore(&info->slock, flags); 1166 } 1167 } 1168 return 1; 1169 } 1170 1171 1172 static void mxser_flush_chars(struct tty_struct *tty) 1173 { 1174 struct mxser_port *info = tty->driver_data; 1175 unsigned long flags; 1176 1177 if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf || 1178 (tty->hw_stopped && info->type != PORT_16550A && 1179 !info->board->chip_flag)) 1180 return; 1181 1182 spin_lock_irqsave(&info->slock, flags); 1183 1184 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); 1185 info->IER |= UART_IER_THRI; 1186 outb(info->IER, info->ioaddr + UART_IER); 1187 1188 spin_unlock_irqrestore(&info->slock, flags); 1189 } 1190 1191 static int mxser_write_room(struct tty_struct *tty) 1192 { 1193 struct mxser_port *info = tty->driver_data; 1194 int ret; 1195 1196 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1; 1197 return ret < 0 ? 0 : ret; 1198 } 1199 1200 static int mxser_chars_in_buffer(struct tty_struct *tty) 1201 { 1202 struct mxser_port *info = tty->driver_data; 1203 return info->xmit_cnt; 1204 } 1205 1206 /* 1207 * ------------------------------------------------------------ 1208 * friends of mxser_ioctl() 1209 * ------------------------------------------------------------ 1210 */ 1211 static int mxser_get_serial_info(struct tty_struct *tty, 1212 struct serial_struct __user *retinfo) 1213 { 1214 struct mxser_port *info = tty->driver_data; 1215 struct serial_struct tmp = { 1216 .type = info->type, 1217 .line = tty->index, 1218 .port = info->ioaddr, 1219 .irq = info->board->irq, 1220 .flags = info->port.flags, 1221 .baud_base = info->baud_base, 1222 .close_delay = info->port.close_delay, 1223 .closing_wait = info->port.closing_wait, 1224 .custom_divisor = info->custom_divisor, 1225 .hub6 = 0 1226 }; 1227 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 1228 return -EFAULT; 1229 return 0; 1230 } 1231 1232 static int mxser_set_serial_info(struct tty_struct *tty, 1233 struct serial_struct __user *new_info) 1234 { 1235 struct mxser_port *info = tty->driver_data; 1236 struct tty_port *port = &info->port; 1237 struct serial_struct new_serial; 1238 speed_t baud; 1239 unsigned long sl_flags; 1240 unsigned int flags; 1241 int retval = 0; 1242 1243 if (!new_info || !info->ioaddr) 1244 return -ENODEV; 1245 if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) 1246 return -EFAULT; 1247 1248 if (new_serial.irq != info->board->irq || 1249 new_serial.port != info->ioaddr) 1250 return -EINVAL; 1251 1252 flags = port->flags & ASYNC_SPD_MASK; 1253 1254 if (!capable(CAP_SYS_ADMIN)) { 1255 if ((new_serial.baud_base != info->baud_base) || 1256 (new_serial.close_delay != info->port.close_delay) || 1257 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK))) 1258 return -EPERM; 1259 info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) | 1260 (new_serial.flags & ASYNC_USR_MASK)); 1261 } else { 1262 /* 1263 * OK, past this point, all the error checking has been done. 1264 * At this point, we start making changes..... 1265 */ 1266 port->flags = ((port->flags & ~ASYNC_FLAGS) | 1267 (new_serial.flags & ASYNC_FLAGS)); 1268 port->close_delay = new_serial.close_delay * HZ / 100; 1269 port->closing_wait = new_serial.closing_wait * HZ / 100; 1270 tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0; 1271 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST && 1272 (new_serial.baud_base != info->baud_base || 1273 new_serial.custom_divisor != 1274 info->custom_divisor)) { 1275 if (new_serial.custom_divisor == 0) 1276 return -EINVAL; 1277 baud = new_serial.baud_base / new_serial.custom_divisor; 1278 tty_encode_baud_rate(tty, baud, baud); 1279 } 1280 } 1281 1282 info->type = new_serial.type; 1283 1284 process_txrx_fifo(info); 1285 1286 if (test_bit(ASYNCB_INITIALIZED, &port->flags)) { 1287 if (flags != (port->flags & ASYNC_SPD_MASK)) { 1288 spin_lock_irqsave(&info->slock, sl_flags); 1289 mxser_change_speed(tty, NULL); 1290 spin_unlock_irqrestore(&info->slock, sl_flags); 1291 } 1292 } else { 1293 retval = mxser_activate(port, tty); 1294 if (retval == 0) 1295 set_bit(ASYNCB_INITIALIZED, &port->flags); 1296 } 1297 return retval; 1298 } 1299 1300 /* 1301 * mxser_get_lsr_info - get line status register info 1302 * 1303 * Purpose: Let user call ioctl() to get info when the UART physically 1304 * is emptied. On bus types like RS485, the transmitter must 1305 * release the bus after transmitting. This must be done when 1306 * the transmit shift register is empty, not be done when the 1307 * transmit holding register is empty. This functionality 1308 * allows an RS485 driver to be written in user space. 1309 */ 1310 static int mxser_get_lsr_info(struct mxser_port *info, 1311 unsigned int __user *value) 1312 { 1313 unsigned char status; 1314 unsigned int result; 1315 unsigned long flags; 1316 1317 spin_lock_irqsave(&info->slock, flags); 1318 status = inb(info->ioaddr + UART_LSR); 1319 spin_unlock_irqrestore(&info->slock, flags); 1320 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0); 1321 return put_user(result, value); 1322 } 1323 1324 static int mxser_tiocmget(struct tty_struct *tty) 1325 { 1326 struct mxser_port *info = tty->driver_data; 1327 unsigned char control, status; 1328 unsigned long flags; 1329 1330 1331 if (tty->index == MXSER_PORTS) 1332 return -ENOIOCTLCMD; 1333 if (test_bit(TTY_IO_ERROR, &tty->flags)) 1334 return -EIO; 1335 1336 control = info->MCR; 1337 1338 spin_lock_irqsave(&info->slock, flags); 1339 status = inb(info->ioaddr + UART_MSR); 1340 if (status & UART_MSR_ANY_DELTA) 1341 mxser_check_modem_status(tty, info, status); 1342 spin_unlock_irqrestore(&info->slock, flags); 1343 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) | 1344 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) | 1345 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) | 1346 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) | 1347 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) | 1348 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0); 1349 } 1350 1351 static int mxser_tiocmset(struct tty_struct *tty, 1352 unsigned int set, unsigned int clear) 1353 { 1354 struct mxser_port *info = tty->driver_data; 1355 unsigned long flags; 1356 1357 1358 if (tty->index == MXSER_PORTS) 1359 return -ENOIOCTLCMD; 1360 if (test_bit(TTY_IO_ERROR, &tty->flags)) 1361 return -EIO; 1362 1363 spin_lock_irqsave(&info->slock, flags); 1364 1365 if (set & TIOCM_RTS) 1366 info->MCR |= UART_MCR_RTS; 1367 if (set & TIOCM_DTR) 1368 info->MCR |= UART_MCR_DTR; 1369 1370 if (clear & TIOCM_RTS) 1371 info->MCR &= ~UART_MCR_RTS; 1372 if (clear & TIOCM_DTR) 1373 info->MCR &= ~UART_MCR_DTR; 1374 1375 outb(info->MCR, info->ioaddr + UART_MCR); 1376 spin_unlock_irqrestore(&info->slock, flags); 1377 return 0; 1378 } 1379 1380 static int __init mxser_program_mode(int port) 1381 { 1382 int id, i, j, n; 1383 1384 outb(0, port); 1385 outb(0, port); 1386 outb(0, port); 1387 (void)inb(port); 1388 (void)inb(port); 1389 outb(0, port); 1390 (void)inb(port); 1391 1392 id = inb(port + 1) & 0x1F; 1393 if ((id != C168_ASIC_ID) && 1394 (id != C104_ASIC_ID) && 1395 (id != C102_ASIC_ID) && 1396 (id != CI132_ASIC_ID) && 1397 (id != CI134_ASIC_ID) && 1398 (id != CI104J_ASIC_ID)) 1399 return -1; 1400 for (i = 0, j = 0; i < 4; i++) { 1401 n = inb(port + 2); 1402 if (n == 'M') { 1403 j = 1; 1404 } else if ((j == 1) && (n == 1)) { 1405 j = 2; 1406 break; 1407 } else 1408 j = 0; 1409 } 1410 if (j != 2) 1411 id = -2; 1412 return id; 1413 } 1414 1415 static void __init mxser_normal_mode(int port) 1416 { 1417 int i, n; 1418 1419 outb(0xA5, port + 1); 1420 outb(0x80, port + 3); 1421 outb(12, port + 0); /* 9600 bps */ 1422 outb(0, port + 1); 1423 outb(0x03, port + 3); /* 8 data bits */ 1424 outb(0x13, port + 4); /* loop back mode */ 1425 for (i = 0; i < 16; i++) { 1426 n = inb(port + 5); 1427 if ((n & 0x61) == 0x60) 1428 break; 1429 if ((n & 1) == 1) 1430 (void)inb(port); 1431 } 1432 outb(0x00, port + 4); 1433 } 1434 1435 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */ 1436 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */ 1437 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */ 1438 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */ 1439 #define EN_CCMD 0x000 /* Chip's command register */ 1440 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */ 1441 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */ 1442 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */ 1443 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */ 1444 #define EN0_DCFG 0x00E /* Data configuration reg WR */ 1445 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */ 1446 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */ 1447 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */ 1448 static int __init mxser_read_register(int port, unsigned short *regs) 1449 { 1450 int i, k, value, id; 1451 unsigned int j; 1452 1453 id = mxser_program_mode(port); 1454 if (id < 0) 1455 return id; 1456 for (i = 0; i < 14; i++) { 1457 k = (i & 0x3F) | 0x180; 1458 for (j = 0x100; j > 0; j >>= 1) { 1459 outb(CHIP_CS, port); 1460 if (k & j) { 1461 outb(CHIP_CS | CHIP_DO, port); 1462 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */ 1463 } else { 1464 outb(CHIP_CS, port); 1465 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */ 1466 } 1467 } 1468 (void)inb(port); 1469 value = 0; 1470 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) { 1471 outb(CHIP_CS, port); 1472 outb(CHIP_CS | CHIP_SK, port); 1473 if (inb(port) & CHIP_DI) 1474 value |= j; 1475 } 1476 regs[i] = value; 1477 outb(0, port); 1478 } 1479 mxser_normal_mode(port); 1480 return id; 1481 } 1482 1483 static int mxser_ioctl_special(unsigned int cmd, void __user *argp) 1484 { 1485 struct mxser_port *ip; 1486 struct tty_port *port; 1487 struct tty_struct *tty; 1488 int result, status; 1489 unsigned int i, j; 1490 int ret = 0; 1491 1492 switch (cmd) { 1493 case MOXA_GET_MAJOR: 1494 printk_ratelimited(KERN_WARNING "mxser: '%s' uses deprecated ioctl " 1495 "%x (GET_MAJOR), fix your userspace\n", 1496 current->comm, cmd); 1497 return put_user(ttymajor, (int __user *)argp); 1498 1499 case MOXA_CHKPORTENABLE: 1500 result = 0; 1501 for (i = 0; i < MXSER_BOARDS; i++) 1502 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) 1503 if (mxser_boards[i].ports[j].ioaddr) 1504 result |= (1 << i); 1505 return put_user(result, (unsigned long __user *)argp); 1506 case MOXA_GETDATACOUNT: 1507 /* The receive side is locked by port->slock but it isn't 1508 clear that an exact snapshot is worth copying here */ 1509 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log))) 1510 ret = -EFAULT; 1511 return ret; 1512 case MOXA_GETMSTATUS: { 1513 struct mxser_mstatus ms, __user *msu = argp; 1514 for (i = 0; i < MXSER_BOARDS; i++) 1515 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) { 1516 ip = &mxser_boards[i].ports[j]; 1517 port = &ip->port; 1518 memset(&ms, 0, sizeof(ms)); 1519 1520 mutex_lock(&port->mutex); 1521 if (!ip->ioaddr) 1522 goto copy; 1523 1524 tty = tty_port_tty_get(port); 1525 1526 if (!tty || !tty->termios) 1527 ms.cflag = ip->normal_termios.c_cflag; 1528 else 1529 ms.cflag = tty->termios->c_cflag; 1530 tty_kref_put(tty); 1531 spin_lock_irq(&ip->slock); 1532 status = inb(ip->ioaddr + UART_MSR); 1533 spin_unlock_irq(&ip->slock); 1534 if (status & UART_MSR_DCD) 1535 ms.dcd = 1; 1536 if (status & UART_MSR_DSR) 1537 ms.dsr = 1; 1538 if (status & UART_MSR_CTS) 1539 ms.cts = 1; 1540 copy: 1541 mutex_unlock(&port->mutex); 1542 if (copy_to_user(msu, &ms, sizeof(ms))) 1543 return -EFAULT; 1544 msu++; 1545 } 1546 return 0; 1547 } 1548 case MOXA_ASPP_MON_EXT: { 1549 struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */ 1550 unsigned int cflag, iflag, p; 1551 u8 opmode; 1552 1553 me = kzalloc(sizeof(*me), GFP_KERNEL); 1554 if (!me) 1555 return -ENOMEM; 1556 1557 for (i = 0, p = 0; i < MXSER_BOARDS; i++) { 1558 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) { 1559 if (p >= ARRAY_SIZE(me->rx_cnt)) { 1560 i = MXSER_BOARDS; 1561 break; 1562 } 1563 ip = &mxser_boards[i].ports[j]; 1564 port = &ip->port; 1565 1566 mutex_lock(&port->mutex); 1567 if (!ip->ioaddr) { 1568 mutex_unlock(&port->mutex); 1569 continue; 1570 } 1571 1572 spin_lock_irq(&ip->slock); 1573 status = mxser_get_msr(ip->ioaddr, 0, p); 1574 1575 if (status & UART_MSR_TERI) 1576 ip->icount.rng++; 1577 if (status & UART_MSR_DDSR) 1578 ip->icount.dsr++; 1579 if (status & UART_MSR_DDCD) 1580 ip->icount.dcd++; 1581 if (status & UART_MSR_DCTS) 1582 ip->icount.cts++; 1583 1584 ip->mon_data.modem_status = status; 1585 me->rx_cnt[p] = ip->mon_data.rxcnt; 1586 me->tx_cnt[p] = ip->mon_data.txcnt; 1587 me->up_rxcnt[p] = ip->mon_data.up_rxcnt; 1588 me->up_txcnt[p] = ip->mon_data.up_txcnt; 1589 me->modem_status[p] = 1590 ip->mon_data.modem_status; 1591 spin_unlock_irq(&ip->slock); 1592 1593 tty = tty_port_tty_get(&ip->port); 1594 1595 if (!tty || !tty->termios) { 1596 cflag = ip->normal_termios.c_cflag; 1597 iflag = ip->normal_termios.c_iflag; 1598 me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios); 1599 } else { 1600 cflag = tty->termios->c_cflag; 1601 iflag = tty->termios->c_iflag; 1602 me->baudrate[p] = tty_get_baud_rate(tty); 1603 } 1604 tty_kref_put(tty); 1605 1606 me->databits[p] = cflag & CSIZE; 1607 me->stopbits[p] = cflag & CSTOPB; 1608 me->parity[p] = cflag & (PARENB | PARODD | 1609 CMSPAR); 1610 1611 if (cflag & CRTSCTS) 1612 me->flowctrl[p] |= 0x03; 1613 1614 if (iflag & (IXON | IXOFF)) 1615 me->flowctrl[p] |= 0x0C; 1616 1617 if (ip->type == PORT_16550A) 1618 me->fifo[p] = 1; 1619 1620 opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2); 1621 opmode &= OP_MODE_MASK; 1622 me->iftype[p] = opmode; 1623 mutex_unlock(&port->mutex); 1624 } 1625 } 1626 if (copy_to_user(argp, me, sizeof(*me))) 1627 ret = -EFAULT; 1628 kfree(me); 1629 return ret; 1630 } 1631 default: 1632 return -ENOIOCTLCMD; 1633 } 1634 return 0; 1635 } 1636 1637 static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg, 1638 struct async_icount *cprev) 1639 { 1640 struct async_icount cnow; 1641 unsigned long flags; 1642 int ret; 1643 1644 spin_lock_irqsave(&info->slock, flags); 1645 cnow = info->icount; /* atomic copy */ 1646 spin_unlock_irqrestore(&info->slock, flags); 1647 1648 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) || 1649 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) || 1650 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) || 1651 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts)); 1652 1653 *cprev = cnow; 1654 1655 return ret; 1656 } 1657 1658 static int mxser_ioctl(struct tty_struct *tty, 1659 unsigned int cmd, unsigned long arg) 1660 { 1661 struct mxser_port *info = tty->driver_data; 1662 struct tty_port *port = &info->port; 1663 struct async_icount cnow; 1664 unsigned long flags; 1665 void __user *argp = (void __user *)arg; 1666 int retval; 1667 1668 if (tty->index == MXSER_PORTS) 1669 return mxser_ioctl_special(cmd, argp); 1670 1671 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) { 1672 int p; 1673 unsigned long opmode; 1674 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f }; 1675 int shiftbit; 1676 unsigned char val, mask; 1677 1678 p = tty->index % 4; 1679 if (cmd == MOXA_SET_OP_MODE) { 1680 if (get_user(opmode, (int __user *) argp)) 1681 return -EFAULT; 1682 if (opmode != RS232_MODE && 1683 opmode != RS485_2WIRE_MODE && 1684 opmode != RS422_MODE && 1685 opmode != RS485_4WIRE_MODE) 1686 return -EFAULT; 1687 mask = ModeMask[p]; 1688 shiftbit = p * 2; 1689 spin_lock_irq(&info->slock); 1690 val = inb(info->opmode_ioaddr); 1691 val &= mask; 1692 val |= (opmode << shiftbit); 1693 outb(val, info->opmode_ioaddr); 1694 spin_unlock_irq(&info->slock); 1695 } else { 1696 shiftbit = p * 2; 1697 spin_lock_irq(&info->slock); 1698 opmode = inb(info->opmode_ioaddr) >> shiftbit; 1699 spin_unlock_irq(&info->slock); 1700 opmode &= OP_MODE_MASK; 1701 if (put_user(opmode, (int __user *)argp)) 1702 return -EFAULT; 1703 } 1704 return 0; 1705 } 1706 1707 if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && 1708 test_bit(TTY_IO_ERROR, &tty->flags)) 1709 return -EIO; 1710 1711 switch (cmd) { 1712 case TIOCGSERIAL: 1713 mutex_lock(&port->mutex); 1714 retval = mxser_get_serial_info(tty, argp); 1715 mutex_unlock(&port->mutex); 1716 return retval; 1717 case TIOCSSERIAL: 1718 mutex_lock(&port->mutex); 1719 retval = mxser_set_serial_info(tty, argp); 1720 mutex_unlock(&port->mutex); 1721 return retval; 1722 case TIOCSERGETLSR: /* Get line status register */ 1723 return mxser_get_lsr_info(info, argp); 1724 /* 1725 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1726 * - mask passed in arg for lines of interest 1727 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1728 * Caller should use TIOCGICOUNT to see which one it was 1729 */ 1730 case TIOCMIWAIT: 1731 spin_lock_irqsave(&info->slock, flags); 1732 cnow = info->icount; /* note the counters on entry */ 1733 spin_unlock_irqrestore(&info->slock, flags); 1734 1735 return wait_event_interruptible(info->port.delta_msr_wait, 1736 mxser_cflags_changed(info, arg, &cnow)); 1737 case MOXA_HighSpeedOn: 1738 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp); 1739 case MOXA_SDS_RSTICOUNTER: 1740 spin_lock_irq(&info->slock); 1741 info->mon_data.rxcnt = 0; 1742 info->mon_data.txcnt = 0; 1743 spin_unlock_irq(&info->slock); 1744 return 0; 1745 1746 case MOXA_ASPP_OQUEUE:{ 1747 int len, lsr; 1748 1749 len = mxser_chars_in_buffer(tty); 1750 spin_lock_irq(&info->slock); 1751 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE; 1752 spin_unlock_irq(&info->slock); 1753 len += (lsr ? 0 : 1); 1754 1755 return put_user(len, (int __user *)argp); 1756 } 1757 case MOXA_ASPP_MON: { 1758 int mcr, status; 1759 1760 spin_lock_irq(&info->slock); 1761 status = mxser_get_msr(info->ioaddr, 1, tty->index); 1762 mxser_check_modem_status(tty, info, status); 1763 1764 mcr = inb(info->ioaddr + UART_MCR); 1765 spin_unlock_irq(&info->slock); 1766 1767 if (mcr & MOXA_MUST_MCR_XON_FLAG) 1768 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD; 1769 else 1770 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD; 1771 1772 if (mcr & MOXA_MUST_MCR_TX_XON) 1773 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT; 1774 else 1775 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT; 1776 1777 if (tty->hw_stopped) 1778 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD; 1779 else 1780 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD; 1781 1782 if (copy_to_user(argp, &info->mon_data, 1783 sizeof(struct mxser_mon))) 1784 return -EFAULT; 1785 1786 return 0; 1787 } 1788 case MOXA_ASPP_LSTATUS: { 1789 if (put_user(info->err_shadow, (unsigned char __user *)argp)) 1790 return -EFAULT; 1791 1792 info->err_shadow = 0; 1793 return 0; 1794 } 1795 case MOXA_SET_BAUD_METHOD: { 1796 int method; 1797 1798 if (get_user(method, (int __user *)argp)) 1799 return -EFAULT; 1800 mxser_set_baud_method[tty->index] = method; 1801 return put_user(method, (int __user *)argp); 1802 } 1803 default: 1804 return -ENOIOCTLCMD; 1805 } 1806 return 0; 1807 } 1808 1809 /* 1810 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1811 * Return: write counters to the user passed counter struct 1812 * NB: both 1->0 and 0->1 transitions are counted except for 1813 * RI where only 0->1 is counted. 1814 */ 1815 1816 static int mxser_get_icount(struct tty_struct *tty, 1817 struct serial_icounter_struct *icount) 1818 1819 { 1820 struct mxser_port *info = tty->driver_data; 1821 struct async_icount cnow; 1822 unsigned long flags; 1823 1824 spin_lock_irqsave(&info->slock, flags); 1825 cnow = info->icount; 1826 spin_unlock_irqrestore(&info->slock, flags); 1827 1828 icount->frame = cnow.frame; 1829 icount->brk = cnow.brk; 1830 icount->overrun = cnow.overrun; 1831 icount->buf_overrun = cnow.buf_overrun; 1832 icount->parity = cnow.parity; 1833 icount->rx = cnow.rx; 1834 icount->tx = cnow.tx; 1835 icount->cts = cnow.cts; 1836 icount->dsr = cnow.dsr; 1837 icount->rng = cnow.rng; 1838 icount->dcd = cnow.dcd; 1839 return 0; 1840 } 1841 1842 static void mxser_stoprx(struct tty_struct *tty) 1843 { 1844 struct mxser_port *info = tty->driver_data; 1845 1846 info->ldisc_stop_rx = 1; 1847 if (I_IXOFF(tty)) { 1848 if (info->board->chip_flag) { 1849 info->IER &= ~MOXA_MUST_RECV_ISR; 1850 outb(info->IER, info->ioaddr + UART_IER); 1851 } else { 1852 info->x_char = STOP_CHAR(tty); 1853 outb(0, info->ioaddr + UART_IER); 1854 info->IER |= UART_IER_THRI; 1855 outb(info->IER, info->ioaddr + UART_IER); 1856 } 1857 } 1858 1859 if (tty->termios->c_cflag & CRTSCTS) { 1860 info->MCR &= ~UART_MCR_RTS; 1861 outb(info->MCR, info->ioaddr + UART_MCR); 1862 } 1863 } 1864 1865 /* 1866 * This routine is called by the upper-layer tty layer to signal that 1867 * incoming characters should be throttled. 1868 */ 1869 static void mxser_throttle(struct tty_struct *tty) 1870 { 1871 mxser_stoprx(tty); 1872 } 1873 1874 static void mxser_unthrottle(struct tty_struct *tty) 1875 { 1876 struct mxser_port *info = tty->driver_data; 1877 1878 /* startrx */ 1879 info->ldisc_stop_rx = 0; 1880 if (I_IXOFF(tty)) { 1881 if (info->x_char) 1882 info->x_char = 0; 1883 else { 1884 if (info->board->chip_flag) { 1885 info->IER |= MOXA_MUST_RECV_ISR; 1886 outb(info->IER, info->ioaddr + UART_IER); 1887 } else { 1888 info->x_char = START_CHAR(tty); 1889 outb(0, info->ioaddr + UART_IER); 1890 info->IER |= UART_IER_THRI; 1891 outb(info->IER, info->ioaddr + UART_IER); 1892 } 1893 } 1894 } 1895 1896 if (tty->termios->c_cflag & CRTSCTS) { 1897 info->MCR |= UART_MCR_RTS; 1898 outb(info->MCR, info->ioaddr + UART_MCR); 1899 } 1900 } 1901 1902 /* 1903 * mxser_stop() and mxser_start() 1904 * 1905 * This routines are called before setting or resetting tty->stopped. 1906 * They enable or disable transmitter interrupts, as necessary. 1907 */ 1908 static void mxser_stop(struct tty_struct *tty) 1909 { 1910 struct mxser_port *info = tty->driver_data; 1911 unsigned long flags; 1912 1913 spin_lock_irqsave(&info->slock, flags); 1914 if (info->IER & UART_IER_THRI) { 1915 info->IER &= ~UART_IER_THRI; 1916 outb(info->IER, info->ioaddr + UART_IER); 1917 } 1918 spin_unlock_irqrestore(&info->slock, flags); 1919 } 1920 1921 static void mxser_start(struct tty_struct *tty) 1922 { 1923 struct mxser_port *info = tty->driver_data; 1924 unsigned long flags; 1925 1926 spin_lock_irqsave(&info->slock, flags); 1927 if (info->xmit_cnt && info->port.xmit_buf) { 1928 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); 1929 info->IER |= UART_IER_THRI; 1930 outb(info->IER, info->ioaddr + UART_IER); 1931 } 1932 spin_unlock_irqrestore(&info->slock, flags); 1933 } 1934 1935 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios) 1936 { 1937 struct mxser_port *info = tty->driver_data; 1938 unsigned long flags; 1939 1940 spin_lock_irqsave(&info->slock, flags); 1941 mxser_change_speed(tty, old_termios); 1942 spin_unlock_irqrestore(&info->slock, flags); 1943 1944 if ((old_termios->c_cflag & CRTSCTS) && 1945 !(tty->termios->c_cflag & CRTSCTS)) { 1946 tty->hw_stopped = 0; 1947 mxser_start(tty); 1948 } 1949 1950 /* Handle sw stopped */ 1951 if ((old_termios->c_iflag & IXON) && 1952 !(tty->termios->c_iflag & IXON)) { 1953 tty->stopped = 0; 1954 1955 if (info->board->chip_flag) { 1956 spin_lock_irqsave(&info->slock, flags); 1957 mxser_disable_must_rx_software_flow_control( 1958 info->ioaddr); 1959 spin_unlock_irqrestore(&info->slock, flags); 1960 } 1961 1962 mxser_start(tty); 1963 } 1964 } 1965 1966 /* 1967 * mxser_wait_until_sent() --- wait until the transmitter is empty 1968 */ 1969 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout) 1970 { 1971 struct mxser_port *info = tty->driver_data; 1972 unsigned long orig_jiffies, char_time; 1973 unsigned long flags; 1974 int lsr; 1975 1976 if (info->type == PORT_UNKNOWN) 1977 return; 1978 1979 if (info->xmit_fifo_size == 0) 1980 return; /* Just in case.... */ 1981 1982 orig_jiffies = jiffies; 1983 /* 1984 * Set the check interval to be 1/5 of the estimated time to 1985 * send a single character, and make it at least 1. The check 1986 * interval should also be less than the timeout. 1987 * 1988 * Note: we have to use pretty tight timings here to satisfy 1989 * the NIST-PCTS. 1990 */ 1991 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size; 1992 char_time = char_time / 5; 1993 if (char_time == 0) 1994 char_time = 1; 1995 if (timeout && timeout < char_time) 1996 char_time = timeout; 1997 /* 1998 * If the transmitter hasn't cleared in twice the approximate 1999 * amount of time to send the entire FIFO, it probably won't 2000 * ever clear. This assumes the UART isn't doing flow 2001 * control, which is currently the case. Hence, if it ever 2002 * takes longer than info->timeout, this is probably due to a 2003 * UART bug of some kind. So, we clamp the timeout parameter at 2004 * 2*info->timeout. 2005 */ 2006 if (!timeout || timeout > 2 * info->timeout) 2007 timeout = 2 * info->timeout; 2008 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT 2009 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...", 2010 timeout, char_time); 2011 printk("jiff=%lu...", jiffies); 2012 #endif 2013 spin_lock_irqsave(&info->slock, flags); 2014 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) { 2015 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT 2016 printk("lsr = %d (jiff=%lu)...", lsr, jiffies); 2017 #endif 2018 spin_unlock_irqrestore(&info->slock, flags); 2019 schedule_timeout_interruptible(char_time); 2020 spin_lock_irqsave(&info->slock, flags); 2021 if (signal_pending(current)) 2022 break; 2023 if (timeout && time_after(jiffies, orig_jiffies + timeout)) 2024 break; 2025 } 2026 spin_unlock_irqrestore(&info->slock, flags); 2027 set_current_state(TASK_RUNNING); 2028 2029 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT 2030 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies); 2031 #endif 2032 } 2033 2034 /* 2035 * This routine is called by tty_hangup() when a hangup is signaled. 2036 */ 2037 static void mxser_hangup(struct tty_struct *tty) 2038 { 2039 struct mxser_port *info = tty->driver_data; 2040 2041 mxser_flush_buffer(tty); 2042 tty_port_hangup(&info->port); 2043 } 2044 2045 /* 2046 * mxser_rs_break() --- routine which turns the break handling on or off 2047 */ 2048 static int mxser_rs_break(struct tty_struct *tty, int break_state) 2049 { 2050 struct mxser_port *info = tty->driver_data; 2051 unsigned long flags; 2052 2053 spin_lock_irqsave(&info->slock, flags); 2054 if (break_state == -1) 2055 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC, 2056 info->ioaddr + UART_LCR); 2057 else 2058 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC, 2059 info->ioaddr + UART_LCR); 2060 spin_unlock_irqrestore(&info->slock, flags); 2061 return 0; 2062 } 2063 2064 static void mxser_receive_chars(struct tty_struct *tty, 2065 struct mxser_port *port, int *status) 2066 { 2067 unsigned char ch, gdl; 2068 int ignored = 0; 2069 int cnt = 0; 2070 int recv_room; 2071 int max = 256; 2072 2073 recv_room = tty->receive_room; 2074 if (recv_room == 0 && !port->ldisc_stop_rx) 2075 mxser_stoprx(tty); 2076 if (port->board->chip_flag != MOXA_OTHER_UART) { 2077 2078 if (*status & UART_LSR_SPECIAL) 2079 goto intr_old; 2080 if (port->board->chip_flag == MOXA_MUST_MU860_HWID && 2081 (*status & MOXA_MUST_LSR_RERR)) 2082 goto intr_old; 2083 if (*status & MOXA_MUST_LSR_RERR) 2084 goto intr_old; 2085 2086 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER); 2087 2088 if (port->board->chip_flag == MOXA_MUST_MU150_HWID) 2089 gdl &= MOXA_MUST_GDL_MASK; 2090 if (gdl >= recv_room) { 2091 if (!port->ldisc_stop_rx) 2092 mxser_stoprx(tty); 2093 } 2094 while (gdl--) { 2095 ch = inb(port->ioaddr + UART_RX); 2096 tty_insert_flip_char(tty, ch, 0); 2097 cnt++; 2098 } 2099 goto end_intr; 2100 } 2101 intr_old: 2102 2103 do { 2104 if (max-- < 0) 2105 break; 2106 2107 ch = inb(port->ioaddr + UART_RX); 2108 if (port->board->chip_flag && (*status & UART_LSR_OE)) 2109 outb(0x23, port->ioaddr + UART_FCR); 2110 *status &= port->read_status_mask; 2111 if (*status & port->ignore_status_mask) { 2112 if (++ignored > 100) 2113 break; 2114 } else { 2115 char flag = 0; 2116 if (*status & UART_LSR_SPECIAL) { 2117 if (*status & UART_LSR_BI) { 2118 flag = TTY_BREAK; 2119 port->icount.brk++; 2120 2121 if (port->port.flags & ASYNC_SAK) 2122 do_SAK(tty); 2123 } else if (*status & UART_LSR_PE) { 2124 flag = TTY_PARITY; 2125 port->icount.parity++; 2126 } else if (*status & UART_LSR_FE) { 2127 flag = TTY_FRAME; 2128 port->icount.frame++; 2129 } else if (*status & UART_LSR_OE) { 2130 flag = TTY_OVERRUN; 2131 port->icount.overrun++; 2132 } else 2133 flag = TTY_BREAK; 2134 } 2135 tty_insert_flip_char(tty, ch, flag); 2136 cnt++; 2137 if (cnt >= recv_room) { 2138 if (!port->ldisc_stop_rx) 2139 mxser_stoprx(tty); 2140 break; 2141 } 2142 2143 } 2144 2145 if (port->board->chip_flag) 2146 break; 2147 2148 *status = inb(port->ioaddr + UART_LSR); 2149 } while (*status & UART_LSR_DR); 2150 2151 end_intr: 2152 mxvar_log.rxcnt[tty->index] += cnt; 2153 port->mon_data.rxcnt += cnt; 2154 port->mon_data.up_rxcnt += cnt; 2155 2156 /* 2157 * We are called from an interrupt context with &port->slock 2158 * being held. Drop it temporarily in order to prevent 2159 * recursive locking. 2160 */ 2161 spin_unlock(&port->slock); 2162 tty_flip_buffer_push(tty); 2163 spin_lock(&port->slock); 2164 } 2165 2166 static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port) 2167 { 2168 int count, cnt; 2169 2170 if (port->x_char) { 2171 outb(port->x_char, port->ioaddr + UART_TX); 2172 port->x_char = 0; 2173 mxvar_log.txcnt[tty->index]++; 2174 port->mon_data.txcnt++; 2175 port->mon_data.up_txcnt++; 2176 port->icount.tx++; 2177 return; 2178 } 2179 2180 if (port->port.xmit_buf == NULL) 2181 return; 2182 2183 if (port->xmit_cnt <= 0 || tty->stopped || 2184 (tty->hw_stopped && 2185 (port->type != PORT_16550A) && 2186 (!port->board->chip_flag))) { 2187 port->IER &= ~UART_IER_THRI; 2188 outb(port->IER, port->ioaddr + UART_IER); 2189 return; 2190 } 2191 2192 cnt = port->xmit_cnt; 2193 count = port->xmit_fifo_size; 2194 do { 2195 outb(port->port.xmit_buf[port->xmit_tail++], 2196 port->ioaddr + UART_TX); 2197 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1); 2198 if (--port->xmit_cnt <= 0) 2199 break; 2200 } while (--count > 0); 2201 mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt); 2202 2203 port->mon_data.txcnt += (cnt - port->xmit_cnt); 2204 port->mon_data.up_txcnt += (cnt - port->xmit_cnt); 2205 port->icount.tx += (cnt - port->xmit_cnt); 2206 2207 if (port->xmit_cnt < WAKEUP_CHARS) 2208 tty_wakeup(tty); 2209 2210 if (port->xmit_cnt <= 0) { 2211 port->IER &= ~UART_IER_THRI; 2212 outb(port->IER, port->ioaddr + UART_IER); 2213 } 2214 } 2215 2216 /* 2217 * This is the serial driver's generic interrupt routine 2218 */ 2219 static irqreturn_t mxser_interrupt(int irq, void *dev_id) 2220 { 2221 int status, iir, i; 2222 struct mxser_board *brd = NULL; 2223 struct mxser_port *port; 2224 int max, irqbits, bits, msr; 2225 unsigned int int_cnt, pass_counter = 0; 2226 int handled = IRQ_NONE; 2227 struct tty_struct *tty; 2228 2229 for (i = 0; i < MXSER_BOARDS; i++) 2230 if (dev_id == &mxser_boards[i]) { 2231 brd = dev_id; 2232 break; 2233 } 2234 2235 if (i == MXSER_BOARDS) 2236 goto irq_stop; 2237 if (brd == NULL) 2238 goto irq_stop; 2239 max = brd->info->nports; 2240 while (pass_counter++ < MXSER_ISR_PASS_LIMIT) { 2241 irqbits = inb(brd->vector) & brd->vector_mask; 2242 if (irqbits == brd->vector_mask) 2243 break; 2244 2245 handled = IRQ_HANDLED; 2246 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) { 2247 if (irqbits == brd->vector_mask) 2248 break; 2249 if (bits & irqbits) 2250 continue; 2251 port = &brd->ports[i]; 2252 2253 int_cnt = 0; 2254 spin_lock(&port->slock); 2255 do { 2256 iir = inb(port->ioaddr + UART_IIR); 2257 if (iir & UART_IIR_NO_INT) 2258 break; 2259 iir &= MOXA_MUST_IIR_MASK; 2260 tty = tty_port_tty_get(&port->port); 2261 if (!tty || 2262 (port->port.flags & ASYNC_CLOSING) || 2263 !(port->port.flags & 2264 ASYNC_INITIALIZED)) { 2265 status = inb(port->ioaddr + UART_LSR); 2266 outb(0x27, port->ioaddr + UART_FCR); 2267 inb(port->ioaddr + UART_MSR); 2268 tty_kref_put(tty); 2269 break; 2270 } 2271 2272 status = inb(port->ioaddr + UART_LSR); 2273 2274 if (status & UART_LSR_PE) 2275 port->err_shadow |= NPPI_NOTIFY_PARITY; 2276 if (status & UART_LSR_FE) 2277 port->err_shadow |= NPPI_NOTIFY_FRAMING; 2278 if (status & UART_LSR_OE) 2279 port->err_shadow |= 2280 NPPI_NOTIFY_HW_OVERRUN; 2281 if (status & UART_LSR_BI) 2282 port->err_shadow |= NPPI_NOTIFY_BREAK; 2283 2284 if (port->board->chip_flag) { 2285 if (iir == MOXA_MUST_IIR_GDA || 2286 iir == MOXA_MUST_IIR_RDA || 2287 iir == MOXA_MUST_IIR_RTO || 2288 iir == MOXA_MUST_IIR_LSR) 2289 mxser_receive_chars(tty, port, 2290 &status); 2291 2292 } else { 2293 status &= port->read_status_mask; 2294 if (status & UART_LSR_DR) 2295 mxser_receive_chars(tty, port, 2296 &status); 2297 } 2298 msr = inb(port->ioaddr + UART_MSR); 2299 if (msr & UART_MSR_ANY_DELTA) 2300 mxser_check_modem_status(tty, port, msr); 2301 2302 if (port->board->chip_flag) { 2303 if (iir == 0x02 && (status & 2304 UART_LSR_THRE)) 2305 mxser_transmit_chars(tty, port); 2306 } else { 2307 if (status & UART_LSR_THRE) 2308 mxser_transmit_chars(tty, port); 2309 } 2310 tty_kref_put(tty); 2311 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT); 2312 spin_unlock(&port->slock); 2313 } 2314 } 2315 2316 irq_stop: 2317 return handled; 2318 } 2319 2320 static const struct tty_operations mxser_ops = { 2321 .open = mxser_open, 2322 .close = mxser_close, 2323 .write = mxser_write, 2324 .put_char = mxser_put_char, 2325 .flush_chars = mxser_flush_chars, 2326 .write_room = mxser_write_room, 2327 .chars_in_buffer = mxser_chars_in_buffer, 2328 .flush_buffer = mxser_flush_buffer, 2329 .ioctl = mxser_ioctl, 2330 .throttle = mxser_throttle, 2331 .unthrottle = mxser_unthrottle, 2332 .set_termios = mxser_set_termios, 2333 .stop = mxser_stop, 2334 .start = mxser_start, 2335 .hangup = mxser_hangup, 2336 .break_ctl = mxser_rs_break, 2337 .wait_until_sent = mxser_wait_until_sent, 2338 .tiocmget = mxser_tiocmget, 2339 .tiocmset = mxser_tiocmset, 2340 .get_icount = mxser_get_icount, 2341 }; 2342 2343 struct tty_port_operations mxser_port_ops = { 2344 .carrier_raised = mxser_carrier_raised, 2345 .dtr_rts = mxser_dtr_rts, 2346 .activate = mxser_activate, 2347 .shutdown = mxser_shutdown_port, 2348 }; 2349 2350 /* 2351 * The MOXA Smartio/Industio serial driver boot-time initialization code! 2352 */ 2353 2354 static void mxser_release_ISA_res(struct mxser_board *brd) 2355 { 2356 free_irq(brd->irq, brd); 2357 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports); 2358 release_region(brd->vector, 1); 2359 } 2360 2361 static int __devinit mxser_initbrd(struct mxser_board *brd, 2362 struct pci_dev *pdev) 2363 { 2364 struct mxser_port *info; 2365 unsigned int i; 2366 int retval; 2367 2368 printk(KERN_INFO "mxser: max. baud rate = %d bps\n", 2369 brd->ports[0].max_baud); 2370 2371 for (i = 0; i < brd->info->nports; i++) { 2372 info = &brd->ports[i]; 2373 tty_port_init(&info->port); 2374 info->port.ops = &mxser_port_ops; 2375 info->board = brd; 2376 info->stop_rx = 0; 2377 info->ldisc_stop_rx = 0; 2378 2379 /* Enhance mode enabled here */ 2380 if (brd->chip_flag != MOXA_OTHER_UART) 2381 mxser_enable_must_enchance_mode(info->ioaddr); 2382 2383 info->port.flags = ASYNC_SHARE_IRQ; 2384 info->type = brd->uart_type; 2385 2386 process_txrx_fifo(info); 2387 2388 info->custom_divisor = info->baud_base * 16; 2389 info->port.close_delay = 5 * HZ / 10; 2390 info->port.closing_wait = 30 * HZ; 2391 info->normal_termios = mxvar_sdriver->init_termios; 2392 memset(&info->mon_data, 0, sizeof(struct mxser_mon)); 2393 info->err_shadow = 0; 2394 spin_lock_init(&info->slock); 2395 2396 /* before set INT ISR, disable all int */ 2397 outb(inb(info->ioaddr + UART_IER) & 0xf0, 2398 info->ioaddr + UART_IER); 2399 } 2400 2401 retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser", 2402 brd); 2403 if (retval) 2404 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may " 2405 "conflict with another device.\n", 2406 brd->info->name, brd->irq); 2407 2408 return retval; 2409 } 2410 2411 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd) 2412 { 2413 int id, i, bits; 2414 unsigned short regs[16], irq; 2415 unsigned char scratch, scratch2; 2416 2417 brd->chip_flag = MOXA_OTHER_UART; 2418 2419 id = mxser_read_register(cap, regs); 2420 switch (id) { 2421 case C168_ASIC_ID: 2422 brd->info = &mxser_cards[0]; 2423 break; 2424 case C104_ASIC_ID: 2425 brd->info = &mxser_cards[1]; 2426 break; 2427 case CI104J_ASIC_ID: 2428 brd->info = &mxser_cards[2]; 2429 break; 2430 case C102_ASIC_ID: 2431 brd->info = &mxser_cards[5]; 2432 break; 2433 case CI132_ASIC_ID: 2434 brd->info = &mxser_cards[6]; 2435 break; 2436 case CI134_ASIC_ID: 2437 brd->info = &mxser_cards[7]; 2438 break; 2439 default: 2440 return 0; 2441 } 2442 2443 irq = 0; 2444 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?) 2445 Flag-hack checks if configuration should be read as 2-port here. */ 2446 if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) { 2447 irq = regs[9] & 0xF000; 2448 irq = irq | (irq >> 4); 2449 if (irq != (regs[9] & 0xFF00)) 2450 goto err_irqconflict; 2451 } else if (brd->info->nports == 4) { 2452 irq = regs[9] & 0xF000; 2453 irq = irq | (irq >> 4); 2454 irq = irq | (irq >> 8); 2455 if (irq != regs[9]) 2456 goto err_irqconflict; 2457 } else if (brd->info->nports == 8) { 2458 irq = regs[9] & 0xF000; 2459 irq = irq | (irq >> 4); 2460 irq = irq | (irq >> 8); 2461 if ((irq != regs[9]) || (irq != regs[10])) 2462 goto err_irqconflict; 2463 } 2464 2465 if (!irq) { 2466 printk(KERN_ERR "mxser: interrupt number unset\n"); 2467 return -EIO; 2468 } 2469 brd->irq = ((int)(irq & 0xF000) >> 12); 2470 for (i = 0; i < 8; i++) 2471 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8; 2472 if ((regs[12] & 0x80) == 0) { 2473 printk(KERN_ERR "mxser: invalid interrupt vector\n"); 2474 return -EIO; 2475 } 2476 brd->vector = (int)regs[11]; /* interrupt vector */ 2477 if (id == 1) 2478 brd->vector_mask = 0x00FF; 2479 else 2480 brd->vector_mask = 0x000F; 2481 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) { 2482 if (regs[12] & bits) { 2483 brd->ports[i].baud_base = 921600; 2484 brd->ports[i].max_baud = 921600; 2485 } else { 2486 brd->ports[i].baud_base = 115200; 2487 brd->ports[i].max_baud = 115200; 2488 } 2489 } 2490 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB); 2491 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR); 2492 outb(0, cap + UART_EFR); /* EFR is the same as FCR */ 2493 outb(scratch2, cap + UART_LCR); 2494 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR); 2495 scratch = inb(cap + UART_IIR); 2496 2497 if (scratch & 0xC0) 2498 brd->uart_type = PORT_16550A; 2499 else 2500 brd->uart_type = PORT_16450; 2501 if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports, 2502 "mxser(IO)")) { 2503 printk(KERN_ERR "mxser: can't request ports I/O region: " 2504 "0x%.8lx-0x%.8lx\n", 2505 brd->ports[0].ioaddr, brd->ports[0].ioaddr + 2506 8 * brd->info->nports - 1); 2507 return -EIO; 2508 } 2509 if (!request_region(brd->vector, 1, "mxser(vector)")) { 2510 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports); 2511 printk(KERN_ERR "mxser: can't request interrupt vector region: " 2512 "0x%.8lx-0x%.8lx\n", 2513 brd->ports[0].ioaddr, brd->ports[0].ioaddr + 2514 8 * brd->info->nports - 1); 2515 return -EIO; 2516 } 2517 return brd->info->nports; 2518 2519 err_irqconflict: 2520 printk(KERN_ERR "mxser: invalid interrupt number\n"); 2521 return -EIO; 2522 } 2523 2524 static int __devinit mxser_probe(struct pci_dev *pdev, 2525 const struct pci_device_id *ent) 2526 { 2527 #ifdef CONFIG_PCI 2528 struct mxser_board *brd; 2529 unsigned int i, j; 2530 unsigned long ioaddress; 2531 int retval = -EINVAL; 2532 2533 for (i = 0; i < MXSER_BOARDS; i++) 2534 if (mxser_boards[i].info == NULL) 2535 break; 2536 2537 if (i >= MXSER_BOARDS) { 2538 dev_err(&pdev->dev, "too many boards found (maximum %d), board " 2539 "not configured\n", MXSER_BOARDS); 2540 goto err; 2541 } 2542 2543 brd = &mxser_boards[i]; 2544 brd->idx = i * MXSER_PORTS_PER_BOARD; 2545 dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n", 2546 mxser_cards[ent->driver_data].name, 2547 pdev->bus->number, PCI_SLOT(pdev->devfn)); 2548 2549 retval = pci_enable_device(pdev); 2550 if (retval) { 2551 dev_err(&pdev->dev, "PCI enable failed\n"); 2552 goto err; 2553 } 2554 2555 /* io address */ 2556 ioaddress = pci_resource_start(pdev, 2); 2557 retval = pci_request_region(pdev, 2, "mxser(IO)"); 2558 if (retval) 2559 goto err_dis; 2560 2561 brd->info = &mxser_cards[ent->driver_data]; 2562 for (i = 0; i < brd->info->nports; i++) 2563 brd->ports[i].ioaddr = ioaddress + 8 * i; 2564 2565 /* vector */ 2566 ioaddress = pci_resource_start(pdev, 3); 2567 retval = pci_request_region(pdev, 3, "mxser(vector)"); 2568 if (retval) 2569 goto err_zero; 2570 brd->vector = ioaddress; 2571 2572 /* irq */ 2573 brd->irq = pdev->irq; 2574 2575 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr); 2576 brd->uart_type = PORT_16550A; 2577 brd->vector_mask = 0; 2578 2579 for (i = 0; i < brd->info->nports; i++) { 2580 for (j = 0; j < UART_INFO_NUM; j++) { 2581 if (Gpci_uart_info[j].type == brd->chip_flag) { 2582 brd->ports[i].max_baud = 2583 Gpci_uart_info[j].max_baud; 2584 2585 /* exception....CP-102 */ 2586 if (brd->info->flags & MXSER_HIGHBAUD) 2587 brd->ports[i].max_baud = 921600; 2588 break; 2589 } 2590 } 2591 } 2592 2593 if (brd->chip_flag == MOXA_MUST_MU860_HWID) { 2594 for (i = 0; i < brd->info->nports; i++) { 2595 if (i < 4) 2596 brd->ports[i].opmode_ioaddr = ioaddress + 4; 2597 else 2598 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c; 2599 } 2600 outb(0, ioaddress + 4); /* default set to RS232 mode */ 2601 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */ 2602 } 2603 2604 for (i = 0; i < brd->info->nports; i++) { 2605 brd->vector_mask |= (1 << i); 2606 brd->ports[i].baud_base = 921600; 2607 } 2608 2609 /* mxser_initbrd will hook ISR. */ 2610 retval = mxser_initbrd(brd, pdev); 2611 if (retval) 2612 goto err_rel3; 2613 2614 for (i = 0; i < brd->info->nports; i++) 2615 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev); 2616 2617 pci_set_drvdata(pdev, brd); 2618 2619 return 0; 2620 err_rel3: 2621 pci_release_region(pdev, 3); 2622 err_zero: 2623 brd->info = NULL; 2624 pci_release_region(pdev, 2); 2625 err_dis: 2626 pci_disable_device(pdev); 2627 err: 2628 return retval; 2629 #else 2630 return -ENODEV; 2631 #endif 2632 } 2633 2634 static void __devexit mxser_remove(struct pci_dev *pdev) 2635 { 2636 #ifdef CONFIG_PCI 2637 struct mxser_board *brd = pci_get_drvdata(pdev); 2638 unsigned int i; 2639 2640 for (i = 0; i < brd->info->nports; i++) 2641 tty_unregister_device(mxvar_sdriver, brd->idx + i); 2642 2643 free_irq(pdev->irq, brd); 2644 pci_release_region(pdev, 2); 2645 pci_release_region(pdev, 3); 2646 pci_disable_device(pdev); 2647 brd->info = NULL; 2648 #endif 2649 } 2650 2651 static struct pci_driver mxser_driver = { 2652 .name = "mxser", 2653 .id_table = mxser_pcibrds, 2654 .probe = mxser_probe, 2655 .remove = __devexit_p(mxser_remove) 2656 }; 2657 2658 static int __init mxser_module_init(void) 2659 { 2660 struct mxser_board *brd; 2661 unsigned int b, i, m; 2662 int retval; 2663 2664 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1); 2665 if (!mxvar_sdriver) 2666 return -ENOMEM; 2667 2668 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n", 2669 MXSER_VERSION); 2670 2671 /* Initialize the tty_driver structure */ 2672 mxvar_sdriver->owner = THIS_MODULE; 2673 mxvar_sdriver->magic = TTY_DRIVER_MAGIC; 2674 mxvar_sdriver->name = "ttyMI"; 2675 mxvar_sdriver->major = ttymajor; 2676 mxvar_sdriver->minor_start = 0; 2677 mxvar_sdriver->num = MXSER_PORTS + 1; 2678 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL; 2679 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL; 2680 mxvar_sdriver->init_termios = tty_std_termios; 2681 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL; 2682 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV; 2683 tty_set_operations(mxvar_sdriver, &mxser_ops); 2684 2685 retval = tty_register_driver(mxvar_sdriver); 2686 if (retval) { 2687 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family " 2688 "tty driver !\n"); 2689 goto err_put; 2690 } 2691 2692 /* Start finding ISA boards here */ 2693 for (m = 0, b = 0; b < MXSER_BOARDS; b++) { 2694 if (!ioaddr[b]) 2695 continue; 2696 2697 brd = &mxser_boards[m]; 2698 retval = mxser_get_ISA_conf(ioaddr[b], brd); 2699 if (retval <= 0) { 2700 brd->info = NULL; 2701 continue; 2702 } 2703 2704 printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n", 2705 brd->info->name, ioaddr[b]); 2706 2707 /* mxser_initbrd will hook ISR. */ 2708 if (mxser_initbrd(brd, NULL) < 0) { 2709 brd->info = NULL; 2710 continue; 2711 } 2712 2713 brd->idx = m * MXSER_PORTS_PER_BOARD; 2714 for (i = 0; i < brd->info->nports; i++) 2715 tty_register_device(mxvar_sdriver, brd->idx + i, NULL); 2716 2717 m++; 2718 } 2719 2720 retval = pci_register_driver(&mxser_driver); 2721 if (retval) { 2722 printk(KERN_ERR "mxser: can't register pci driver\n"); 2723 if (!m) { 2724 retval = -ENODEV; 2725 goto err_unr; 2726 } /* else: we have some ISA cards under control */ 2727 } 2728 2729 return 0; 2730 err_unr: 2731 tty_unregister_driver(mxvar_sdriver); 2732 err_put: 2733 put_tty_driver(mxvar_sdriver); 2734 return retval; 2735 } 2736 2737 static void __exit mxser_module_exit(void) 2738 { 2739 unsigned int i, j; 2740 2741 pci_unregister_driver(&mxser_driver); 2742 2743 for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */ 2744 if (mxser_boards[i].info != NULL) 2745 for (j = 0; j < mxser_boards[i].info->nports; j++) 2746 tty_unregister_device(mxvar_sdriver, 2747 mxser_boards[i].idx + j); 2748 tty_unregister_driver(mxvar_sdriver); 2749 put_tty_driver(mxvar_sdriver); 2750 2751 for (i = 0; i < MXSER_BOARDS; i++) 2752 if (mxser_boards[i].info != NULL) 2753 mxser_release_ISA_res(&mxser_boards[i]); 2754 } 2755 2756 module_init(mxser_module_init); 2757 module_exit(mxser_module_exit); 2758