1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * mxser.c -- MOXA Smartio/Industio family multiport serial driver. 4 * 5 * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com). 6 * Copyright (C) 2006-2008 Jiri Slaby <jirislaby@gmail.com> 7 * 8 * This code is loosely based on the 1.8 moxa driver which is based on 9 * Linux serial driver, written by Linus Torvalds, Theodore T'so and 10 * others. 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox 18 * <alan@lxorguk.ukuu.org.uk>. The original 1.8 code is available on 19 * www.moxa.com. 20 * - Fixed x86_64 cleanness 21 */ 22 23 #include <linux/module.h> 24 #include <linux/errno.h> 25 #include <linux/signal.h> 26 #include <linux/sched.h> 27 #include <linux/timer.h> 28 #include <linux/interrupt.h> 29 #include <linux/tty.h> 30 #include <linux/tty_flip.h> 31 #include <linux/serial.h> 32 #include <linux/serial_reg.h> 33 #include <linux/major.h> 34 #include <linux/string.h> 35 #include <linux/fcntl.h> 36 #include <linux/ptrace.h> 37 #include <linux/ioport.h> 38 #include <linux/mm.h> 39 #include <linux/delay.h> 40 #include <linux/pci.h> 41 #include <linux/bitops.h> 42 #include <linux/slab.h> 43 #include <linux/ratelimit.h> 44 45 #include <asm/io.h> 46 #include <asm/irq.h> 47 #include <linux/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 const 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_hw_array(ioaddr, ulong, ioport, 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 unsigned int timeout; 251 252 int read_status_mask; 253 int ignore_status_mask; 254 unsigned int xmit_fifo_size; 255 int xmit_head; 256 int xmit_tail; 257 int xmit_cnt; 258 int closing; 259 260 struct ktermios normal_termios; 261 262 struct mxser_mon mon_data; 263 264 spinlock_t slock; 265 }; 266 267 struct mxser_board { 268 unsigned int idx; 269 int irq; 270 const struct mxser_cardinfo *info; 271 unsigned long vector; 272 unsigned long vector_mask; 273 274 int chip_flag; 275 int uart_type; 276 277 struct mxser_port ports[MXSER_PORTS_PER_BOARD]; 278 }; 279 280 struct mxser_mstatus { 281 tcflag_t cflag; 282 int cts; 283 int dsr; 284 int ri; 285 int dcd; 286 }; 287 288 static struct mxser_board mxser_boards[MXSER_BOARDS]; 289 static struct tty_driver *mxvar_sdriver; 290 static struct mxser_log mxvar_log; 291 static int mxser_set_baud_method[MXSER_PORTS + 1]; 292 293 static void mxser_enable_must_enchance_mode(unsigned long baseio) 294 { 295 u8 oldlcr; 296 u8 efr; 297 298 oldlcr = inb(baseio + UART_LCR); 299 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 300 301 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 302 efr |= MOXA_MUST_EFR_EFRB_ENABLE; 303 304 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 305 outb(oldlcr, baseio + UART_LCR); 306 } 307 308 #ifdef CONFIG_PCI 309 static void mxser_disable_must_enchance_mode(unsigned long baseio) 310 { 311 u8 oldlcr; 312 u8 efr; 313 314 oldlcr = inb(baseio + UART_LCR); 315 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 316 317 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 318 efr &= ~MOXA_MUST_EFR_EFRB_ENABLE; 319 320 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 321 outb(oldlcr, baseio + UART_LCR); 322 } 323 #endif 324 325 static void mxser_set_must_xon1_value(unsigned long baseio, u8 value) 326 { 327 u8 oldlcr; 328 u8 efr; 329 330 oldlcr = inb(baseio + UART_LCR); 331 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 332 333 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 334 efr &= ~MOXA_MUST_EFR_BANK_MASK; 335 efr |= MOXA_MUST_EFR_BANK0; 336 337 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 338 outb(value, baseio + MOXA_MUST_XON1_REGISTER); 339 outb(oldlcr, baseio + UART_LCR); 340 } 341 342 static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value) 343 { 344 u8 oldlcr; 345 u8 efr; 346 347 oldlcr = inb(baseio + UART_LCR); 348 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 349 350 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 351 efr &= ~MOXA_MUST_EFR_BANK_MASK; 352 efr |= MOXA_MUST_EFR_BANK0; 353 354 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 355 outb(value, baseio + MOXA_MUST_XOFF1_REGISTER); 356 outb(oldlcr, baseio + UART_LCR); 357 } 358 359 static void mxser_set_must_fifo_value(struct mxser_port *info) 360 { 361 u8 oldlcr; 362 u8 efr; 363 364 oldlcr = inb(info->ioaddr + UART_LCR); 365 outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR); 366 367 efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER); 368 efr &= ~MOXA_MUST_EFR_BANK_MASK; 369 efr |= MOXA_MUST_EFR_BANK1; 370 371 outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER); 372 outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER); 373 outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER); 374 outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER); 375 outb(oldlcr, info->ioaddr + UART_LCR); 376 } 377 378 static void mxser_set_must_enum_value(unsigned long baseio, u8 value) 379 { 380 u8 oldlcr; 381 u8 efr; 382 383 oldlcr = inb(baseio + UART_LCR); 384 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 385 386 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 387 efr &= ~MOXA_MUST_EFR_BANK_MASK; 388 efr |= MOXA_MUST_EFR_BANK2; 389 390 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 391 outb(value, baseio + MOXA_MUST_ENUM_REGISTER); 392 outb(oldlcr, baseio + UART_LCR); 393 } 394 395 #ifdef CONFIG_PCI 396 static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId) 397 { 398 u8 oldlcr; 399 u8 efr; 400 401 oldlcr = inb(baseio + UART_LCR); 402 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 403 404 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 405 efr &= ~MOXA_MUST_EFR_BANK_MASK; 406 efr |= MOXA_MUST_EFR_BANK2; 407 408 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 409 *pId = inb(baseio + MOXA_MUST_HWID_REGISTER); 410 outb(oldlcr, baseio + UART_LCR); 411 } 412 #endif 413 414 static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio) 415 { 416 u8 oldlcr; 417 u8 efr; 418 419 oldlcr = inb(baseio + UART_LCR); 420 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 421 422 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 423 efr &= ~MOXA_MUST_EFR_SF_MASK; 424 425 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 426 outb(oldlcr, baseio + UART_LCR); 427 } 428 429 static void mxser_enable_must_tx_software_flow_control(unsigned long baseio) 430 { 431 u8 oldlcr; 432 u8 efr; 433 434 oldlcr = inb(baseio + UART_LCR); 435 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 436 437 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 438 efr &= ~MOXA_MUST_EFR_SF_TX_MASK; 439 efr |= MOXA_MUST_EFR_SF_TX1; 440 441 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 442 outb(oldlcr, baseio + UART_LCR); 443 } 444 445 static void mxser_disable_must_tx_software_flow_control(unsigned long baseio) 446 { 447 u8 oldlcr; 448 u8 efr; 449 450 oldlcr = inb(baseio + UART_LCR); 451 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 452 453 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 454 efr &= ~MOXA_MUST_EFR_SF_TX_MASK; 455 456 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 457 outb(oldlcr, baseio + UART_LCR); 458 } 459 460 static void mxser_enable_must_rx_software_flow_control(unsigned long baseio) 461 { 462 u8 oldlcr; 463 u8 efr; 464 465 oldlcr = inb(baseio + UART_LCR); 466 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 467 468 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 469 efr &= ~MOXA_MUST_EFR_SF_RX_MASK; 470 efr |= MOXA_MUST_EFR_SF_RX1; 471 472 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 473 outb(oldlcr, baseio + UART_LCR); 474 } 475 476 static void mxser_disable_must_rx_software_flow_control(unsigned long baseio) 477 { 478 u8 oldlcr; 479 u8 efr; 480 481 oldlcr = inb(baseio + UART_LCR); 482 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); 483 484 efr = inb(baseio + MOXA_MUST_EFR_REGISTER); 485 efr &= ~MOXA_MUST_EFR_SF_RX_MASK; 486 487 outb(efr, baseio + MOXA_MUST_EFR_REGISTER); 488 outb(oldlcr, baseio + UART_LCR); 489 } 490 491 #ifdef CONFIG_PCI 492 static int CheckIsMoxaMust(unsigned long io) 493 { 494 u8 oldmcr, hwid; 495 int i; 496 497 outb(0, io + UART_LCR); 498 mxser_disable_must_enchance_mode(io); 499 oldmcr = inb(io + UART_MCR); 500 outb(0, io + UART_MCR); 501 mxser_set_must_xon1_value(io, 0x11); 502 if ((hwid = inb(io + UART_MCR)) != 0) { 503 outb(oldmcr, io + UART_MCR); 504 return MOXA_OTHER_UART; 505 } 506 507 mxser_get_must_hardware_id(io, &hwid); 508 for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */ 509 if (hwid == Gpci_uart_info[i].type) 510 return (int)hwid; 511 } 512 return MOXA_OTHER_UART; 513 } 514 #endif 515 516 static void process_txrx_fifo(struct mxser_port *info) 517 { 518 int i; 519 520 if ((info->type == PORT_16450) || (info->type == PORT_8250)) { 521 info->rx_trigger = 1; 522 info->rx_high_water = 1; 523 info->rx_low_water = 1; 524 info->xmit_fifo_size = 1; 525 } else 526 for (i = 0; i < UART_INFO_NUM; i++) 527 if (info->board->chip_flag == Gpci_uart_info[i].type) { 528 info->rx_trigger = Gpci_uart_info[i].rx_trigger; 529 info->rx_low_water = Gpci_uart_info[i].rx_low_water; 530 info->rx_high_water = Gpci_uart_info[i].rx_high_water; 531 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size; 532 break; 533 } 534 } 535 536 static unsigned char mxser_get_msr(int baseaddr, int mode, int port) 537 { 538 static unsigned char mxser_msr[MXSER_PORTS + 1]; 539 unsigned char status = 0; 540 541 status = inb(baseaddr + UART_MSR); 542 543 mxser_msr[port] &= 0x0F; 544 mxser_msr[port] |= status; 545 status = mxser_msr[port]; 546 if (mode) 547 mxser_msr[port] = 0; 548 549 return status; 550 } 551 552 static int mxser_carrier_raised(struct tty_port *port) 553 { 554 struct mxser_port *mp = container_of(port, struct mxser_port, port); 555 return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0; 556 } 557 558 static void mxser_dtr_rts(struct tty_port *port, int on) 559 { 560 struct mxser_port *mp = container_of(port, struct mxser_port, port); 561 unsigned long flags; 562 563 spin_lock_irqsave(&mp->slock, flags); 564 if (on) 565 outb(inb(mp->ioaddr + UART_MCR) | 566 UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR); 567 else 568 outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS), 569 mp->ioaddr + UART_MCR); 570 spin_unlock_irqrestore(&mp->slock, flags); 571 } 572 573 static int mxser_set_baud(struct tty_struct *tty, long newspd) 574 { 575 struct mxser_port *info = tty->driver_data; 576 unsigned int quot = 0, baud; 577 unsigned char cval; 578 u64 timeout; 579 580 if (!info->ioaddr) 581 return -1; 582 583 if (newspd > info->max_baud) 584 return -1; 585 586 if (newspd == 134) { 587 quot = 2 * info->baud_base / 269; 588 tty_encode_baud_rate(tty, 134, 134); 589 } else if (newspd) { 590 quot = info->baud_base / newspd; 591 if (quot == 0) 592 quot = 1; 593 baud = info->baud_base/quot; 594 tty_encode_baud_rate(tty, baud, baud); 595 } else { 596 quot = 0; 597 } 598 599 /* 600 * worst case (128 * 1000 * 10 * 18432) needs 35 bits, so divide in the 601 * u64 domain 602 */ 603 timeout = (u64)info->xmit_fifo_size * HZ * 10 * quot; 604 do_div(timeout, info->baud_base); 605 info->timeout = timeout + HZ / 50; /* Add .02 seconds of slop */ 606 607 if (quot) { 608 info->MCR |= UART_MCR_DTR; 609 outb(info->MCR, info->ioaddr + UART_MCR); 610 } else { 611 info->MCR &= ~UART_MCR_DTR; 612 outb(info->MCR, info->ioaddr + UART_MCR); 613 return 0; 614 } 615 616 cval = inb(info->ioaddr + UART_LCR); 617 618 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */ 619 620 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */ 621 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */ 622 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */ 623 624 #ifdef BOTHER 625 if (C_BAUD(tty) == BOTHER) { 626 quot = info->baud_base % newspd; 627 quot *= 8; 628 if (quot % newspd > newspd / 2) { 629 quot /= newspd; 630 quot++; 631 } else 632 quot /= newspd; 633 634 mxser_set_must_enum_value(info->ioaddr, quot); 635 } else 636 #endif 637 mxser_set_must_enum_value(info->ioaddr, 0); 638 639 return 0; 640 } 641 642 /* 643 * This routine is called to set the UART divisor registers to match 644 * the specified baud rate for a serial port. 645 */ 646 static int mxser_change_speed(struct tty_struct *tty) 647 { 648 struct mxser_port *info = tty->driver_data; 649 unsigned cflag, cval, fcr; 650 int ret = 0; 651 unsigned char status; 652 653 cflag = tty->termios.c_cflag; 654 if (!info->ioaddr) 655 return ret; 656 657 if (mxser_set_baud_method[tty->index] == 0) 658 mxser_set_baud(tty, tty_get_baud_rate(tty)); 659 660 /* byte size and parity */ 661 switch (cflag & CSIZE) { 662 case CS5: 663 cval = 0x00; 664 break; 665 case CS6: 666 cval = 0x01; 667 break; 668 case CS7: 669 cval = 0x02; 670 break; 671 case CS8: 672 cval = 0x03; 673 break; 674 default: 675 cval = 0x00; 676 break; /* too keep GCC shut... */ 677 } 678 if (cflag & CSTOPB) 679 cval |= 0x04; 680 if (cflag & PARENB) 681 cval |= UART_LCR_PARITY; 682 if (!(cflag & PARODD)) 683 cval |= UART_LCR_EPAR; 684 if (cflag & CMSPAR) 685 cval |= UART_LCR_SPAR; 686 687 if ((info->type == PORT_8250) || (info->type == PORT_16450)) { 688 if (info->board->chip_flag) { 689 fcr = UART_FCR_ENABLE_FIFO; 690 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE; 691 mxser_set_must_fifo_value(info); 692 } else 693 fcr = 0; 694 } else { 695 fcr = UART_FCR_ENABLE_FIFO; 696 if (info->board->chip_flag) { 697 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE; 698 mxser_set_must_fifo_value(info); 699 } else { 700 switch (info->rx_trigger) { 701 case 1: 702 fcr |= UART_FCR_TRIGGER_1; 703 break; 704 case 4: 705 fcr |= UART_FCR_TRIGGER_4; 706 break; 707 case 8: 708 fcr |= UART_FCR_TRIGGER_8; 709 break; 710 default: 711 fcr |= UART_FCR_TRIGGER_14; 712 break; 713 } 714 } 715 } 716 717 /* CTS flow control flag and modem status interrupts */ 718 info->IER &= ~UART_IER_MSI; 719 info->MCR &= ~UART_MCR_AFE; 720 tty_port_set_cts_flow(&info->port, cflag & CRTSCTS); 721 if (cflag & CRTSCTS) { 722 info->IER |= UART_IER_MSI; 723 if ((info->type == PORT_16550A) || (info->board->chip_flag)) { 724 info->MCR |= UART_MCR_AFE; 725 } else { 726 status = inb(info->ioaddr + UART_MSR); 727 if (tty->hw_stopped) { 728 if (status & UART_MSR_CTS) { 729 tty->hw_stopped = 0; 730 if (info->type != PORT_16550A && 731 !info->board->chip_flag) { 732 outb(info->IER & ~UART_IER_THRI, 733 info->ioaddr + 734 UART_IER); 735 info->IER |= UART_IER_THRI; 736 outb(info->IER, info->ioaddr + 737 UART_IER); 738 } 739 tty_wakeup(tty); 740 } 741 } else { 742 if (!(status & UART_MSR_CTS)) { 743 tty->hw_stopped = 1; 744 if ((info->type != PORT_16550A) && 745 (!info->board->chip_flag)) { 746 info->IER &= ~UART_IER_THRI; 747 outb(info->IER, info->ioaddr + 748 UART_IER); 749 } 750 } 751 } 752 } 753 } 754 outb(info->MCR, info->ioaddr + UART_MCR); 755 tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL); 756 if (~cflag & CLOCAL) 757 info->IER |= UART_IER_MSI; 758 outb(info->IER, info->ioaddr + UART_IER); 759 760 /* 761 * Set up parity check flag 762 */ 763 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; 764 if (I_INPCK(tty)) 765 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE; 766 if (I_BRKINT(tty) || I_PARMRK(tty)) 767 info->read_status_mask |= UART_LSR_BI; 768 769 info->ignore_status_mask = 0; 770 771 if (I_IGNBRK(tty)) { 772 info->ignore_status_mask |= UART_LSR_BI; 773 info->read_status_mask |= UART_LSR_BI; 774 /* 775 * If we're ignore parity and break indicators, ignore 776 * overruns too. (For real raw support). 777 */ 778 if (I_IGNPAR(tty)) { 779 info->ignore_status_mask |= 780 UART_LSR_OE | 781 UART_LSR_PE | 782 UART_LSR_FE; 783 info->read_status_mask |= 784 UART_LSR_OE | 785 UART_LSR_PE | 786 UART_LSR_FE; 787 } 788 } 789 if (info->board->chip_flag) { 790 mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty)); 791 mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty)); 792 if (I_IXON(tty)) { 793 mxser_enable_must_rx_software_flow_control( 794 info->ioaddr); 795 } else { 796 mxser_disable_must_rx_software_flow_control( 797 info->ioaddr); 798 } 799 if (I_IXOFF(tty)) { 800 mxser_enable_must_tx_software_flow_control( 801 info->ioaddr); 802 } else { 803 mxser_disable_must_tx_software_flow_control( 804 info->ioaddr); 805 } 806 } 807 808 809 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */ 810 outb(cval, info->ioaddr + UART_LCR); 811 812 return ret; 813 } 814 815 static void mxser_check_modem_status(struct tty_struct *tty, 816 struct mxser_port *port, int status) 817 { 818 /* update input line counters */ 819 if (status & UART_MSR_TERI) 820 port->icount.rng++; 821 if (status & UART_MSR_DDSR) 822 port->icount.dsr++; 823 if (status & UART_MSR_DDCD) 824 port->icount.dcd++; 825 if (status & UART_MSR_DCTS) 826 port->icount.cts++; 827 port->mon_data.modem_status = status; 828 wake_up_interruptible(&port->port.delta_msr_wait); 829 830 if (tty_port_check_carrier(&port->port) && (status & UART_MSR_DDCD)) { 831 if (status & UART_MSR_DCD) 832 wake_up_interruptible(&port->port.open_wait); 833 } 834 835 if (tty_port_cts_enabled(&port->port)) { 836 if (tty->hw_stopped) { 837 if (status & UART_MSR_CTS) { 838 tty->hw_stopped = 0; 839 840 if ((port->type != PORT_16550A) && 841 (!port->board->chip_flag)) { 842 outb(port->IER & ~UART_IER_THRI, 843 port->ioaddr + UART_IER); 844 port->IER |= UART_IER_THRI; 845 outb(port->IER, port->ioaddr + 846 UART_IER); 847 } 848 tty_wakeup(tty); 849 } 850 } else { 851 if (!(status & UART_MSR_CTS)) { 852 tty->hw_stopped = 1; 853 if (port->type != PORT_16550A && 854 !port->board->chip_flag) { 855 port->IER &= ~UART_IER_THRI; 856 outb(port->IER, port->ioaddr + 857 UART_IER); 858 } 859 } 860 } 861 } 862 } 863 864 static int mxser_activate(struct tty_port *port, struct tty_struct *tty) 865 { 866 struct mxser_port *info = container_of(port, struct mxser_port, port); 867 unsigned long page; 868 unsigned long flags; 869 870 page = __get_free_page(GFP_KERNEL); 871 if (!page) 872 return -ENOMEM; 873 874 spin_lock_irqsave(&info->slock, flags); 875 876 if (!info->ioaddr || !info->type) { 877 set_bit(TTY_IO_ERROR, &tty->flags); 878 free_page(page); 879 spin_unlock_irqrestore(&info->slock, flags); 880 return 0; 881 } 882 info->port.xmit_buf = (unsigned char *) page; 883 884 /* 885 * Clear the FIFO buffers and disable them 886 * (they will be reenabled in mxser_change_speed()) 887 */ 888 if (info->board->chip_flag) 889 outb((UART_FCR_CLEAR_RCVR | 890 UART_FCR_CLEAR_XMIT | 891 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR); 892 else 893 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), 894 info->ioaddr + UART_FCR); 895 896 /* 897 * At this point there's no way the LSR could still be 0xFF; 898 * if it is, then bail out, because there's likely no UART 899 * here. 900 */ 901 if (inb(info->ioaddr + UART_LSR) == 0xff) { 902 spin_unlock_irqrestore(&info->slock, flags); 903 if (capable(CAP_SYS_ADMIN)) { 904 set_bit(TTY_IO_ERROR, &tty->flags); 905 return 0; 906 } else 907 return -ENODEV; 908 } 909 910 /* 911 * Clear the interrupt registers. 912 */ 913 (void) inb(info->ioaddr + UART_LSR); 914 (void) inb(info->ioaddr + UART_RX); 915 (void) inb(info->ioaddr + UART_IIR); 916 (void) inb(info->ioaddr + UART_MSR); 917 918 /* 919 * Now, initialize the UART 920 */ 921 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */ 922 info->MCR = UART_MCR_DTR | UART_MCR_RTS; 923 outb(info->MCR, info->ioaddr + UART_MCR); 924 925 /* 926 * Finally, enable interrupts 927 */ 928 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI; 929 930 if (info->board->chip_flag) 931 info->IER |= MOXA_MUST_IER_EGDAI; 932 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */ 933 934 /* 935 * And clear the interrupt registers again for luck. 936 */ 937 (void) inb(info->ioaddr + UART_LSR); 938 (void) inb(info->ioaddr + UART_RX); 939 (void) inb(info->ioaddr + UART_IIR); 940 (void) inb(info->ioaddr + UART_MSR); 941 942 clear_bit(TTY_IO_ERROR, &tty->flags); 943 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; 944 945 /* 946 * and set the speed of the serial port 947 */ 948 mxser_change_speed(tty); 949 spin_unlock_irqrestore(&info->slock, flags); 950 951 return 0; 952 } 953 954 /* 955 * This routine will shutdown a serial port 956 */ 957 static void mxser_shutdown_port(struct tty_port *port) 958 { 959 struct mxser_port *info = container_of(port, struct mxser_port, port); 960 unsigned long flags; 961 962 spin_lock_irqsave(&info->slock, flags); 963 964 /* 965 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq 966 * here so the queue might never be waken up 967 */ 968 wake_up_interruptible(&info->port.delta_msr_wait); 969 970 /* 971 * Free the xmit buffer, if necessary 972 */ 973 if (info->port.xmit_buf) { 974 free_page((unsigned long) info->port.xmit_buf); 975 info->port.xmit_buf = NULL; 976 } 977 978 info->IER = 0; 979 outb(0x00, info->ioaddr + UART_IER); 980 981 /* clear Rx/Tx FIFO's */ 982 if (info->board->chip_flag) 983 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | 984 MOXA_MUST_FCR_GDA_MODE_ENABLE, 985 info->ioaddr + UART_FCR); 986 else 987 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT, 988 info->ioaddr + UART_FCR); 989 990 /* read data port to reset things */ 991 (void) inb(info->ioaddr + UART_RX); 992 993 994 if (info->board->chip_flag) 995 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr); 996 997 spin_unlock_irqrestore(&info->slock, flags); 998 } 999 1000 /* 1001 * This routine is called whenever a serial port is opened. It 1002 * enables interrupts for a serial port, linking in its async structure into 1003 * the IRQ chain. It also performs the serial-specific 1004 * initialization for the tty structure. 1005 */ 1006 static int mxser_open(struct tty_struct *tty, struct file *filp) 1007 { 1008 struct mxser_port *info; 1009 int line; 1010 1011 line = tty->index; 1012 if (line == MXSER_PORTS) 1013 return 0; 1014 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD]; 1015 if (!info->ioaddr) 1016 return -ENODEV; 1017 1018 tty->driver_data = info; 1019 return tty_port_open(&info->port, tty, filp); 1020 } 1021 1022 static void mxser_flush_buffer(struct tty_struct *tty) 1023 { 1024 struct mxser_port *info = tty->driver_data; 1025 char fcr; 1026 unsigned long flags; 1027 1028 1029 spin_lock_irqsave(&info->slock, flags); 1030 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; 1031 1032 fcr = inb(info->ioaddr + UART_FCR); 1033 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), 1034 info->ioaddr + UART_FCR); 1035 outb(fcr, info->ioaddr + UART_FCR); 1036 1037 spin_unlock_irqrestore(&info->slock, flags); 1038 1039 tty_wakeup(tty); 1040 } 1041 1042 1043 static void mxser_close_port(struct tty_port *port) 1044 { 1045 struct mxser_port *info = container_of(port, struct mxser_port, port); 1046 unsigned long timeout; 1047 /* 1048 * At this point we stop accepting input. To do this, we 1049 * disable the receive line status interrupts, and tell the 1050 * interrupt driver to stop checking the data ready bit in the 1051 * line status register. 1052 */ 1053 info->IER &= ~UART_IER_RLSI; 1054 if (info->board->chip_flag) 1055 info->IER &= ~MOXA_MUST_RECV_ISR; 1056 1057 outb(info->IER, info->ioaddr + UART_IER); 1058 /* 1059 * Before we drop DTR, make sure the UART transmitter 1060 * has completely drained; this is especially 1061 * important if there is a transmit FIFO! 1062 */ 1063 timeout = jiffies + HZ; 1064 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) { 1065 schedule_timeout_interruptible(5); 1066 if (time_after(jiffies, timeout)) 1067 break; 1068 } 1069 } 1070 1071 /* 1072 * This routine is called when the serial port gets closed. First, we 1073 * wait for the last remaining data to be sent. Then, we unlink its 1074 * async structure from the interrupt chain if necessary, and we free 1075 * that IRQ if nothing is left in the chain. 1076 */ 1077 static void mxser_close(struct tty_struct *tty, struct file *filp) 1078 { 1079 struct mxser_port *info = tty->driver_data; 1080 struct tty_port *port = &info->port; 1081 1082 if (tty->index == MXSER_PORTS || info == NULL) 1083 return; 1084 if (tty_port_close_start(port, tty, filp) == 0) 1085 return; 1086 info->closing = 1; 1087 mutex_lock(&port->mutex); 1088 mxser_close_port(port); 1089 mxser_flush_buffer(tty); 1090 if (tty_port_initialized(port) && C_HUPCL(tty)) 1091 tty_port_lower_dtr_rts(port); 1092 mxser_shutdown_port(port); 1093 tty_port_set_initialized(port, 0); 1094 mutex_unlock(&port->mutex); 1095 info->closing = 0; 1096 /* Right now the tty_port set is done outside of the close_end helper 1097 as we don't yet have everyone using refcounts */ 1098 tty_port_close_end(port, tty); 1099 tty_port_tty_set(port, NULL); 1100 } 1101 1102 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count) 1103 { 1104 int c, total = 0; 1105 struct mxser_port *info = tty->driver_data; 1106 unsigned long flags; 1107 1108 if (!info->port.xmit_buf) 1109 return 0; 1110 1111 while (1) { 1112 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, 1113 SERIAL_XMIT_SIZE - info->xmit_head)); 1114 if (c <= 0) 1115 break; 1116 1117 memcpy(info->port.xmit_buf + info->xmit_head, buf, c); 1118 spin_lock_irqsave(&info->slock, flags); 1119 info->xmit_head = (info->xmit_head + c) & 1120 (SERIAL_XMIT_SIZE - 1); 1121 info->xmit_cnt += c; 1122 spin_unlock_irqrestore(&info->slock, flags); 1123 1124 buf += c; 1125 count -= c; 1126 total += c; 1127 } 1128 1129 if (info->xmit_cnt && !tty->stopped) { 1130 if (!tty->hw_stopped || 1131 (info->type == PORT_16550A) || 1132 (info->board->chip_flag)) { 1133 spin_lock_irqsave(&info->slock, flags); 1134 outb(info->IER & ~UART_IER_THRI, info->ioaddr + 1135 UART_IER); 1136 info->IER |= UART_IER_THRI; 1137 outb(info->IER, info->ioaddr + UART_IER); 1138 spin_unlock_irqrestore(&info->slock, flags); 1139 } 1140 } 1141 return total; 1142 } 1143 1144 static int mxser_put_char(struct tty_struct *tty, unsigned char ch) 1145 { 1146 struct mxser_port *info = tty->driver_data; 1147 unsigned long flags; 1148 1149 if (!info->port.xmit_buf) 1150 return 0; 1151 1152 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) 1153 return 0; 1154 1155 spin_lock_irqsave(&info->slock, flags); 1156 info->port.xmit_buf[info->xmit_head++] = ch; 1157 info->xmit_head &= SERIAL_XMIT_SIZE - 1; 1158 info->xmit_cnt++; 1159 spin_unlock_irqrestore(&info->slock, flags); 1160 if (!tty->stopped) { 1161 if (!tty->hw_stopped || 1162 (info->type == PORT_16550A) || 1163 info->board->chip_flag) { 1164 spin_lock_irqsave(&info->slock, flags); 1165 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); 1166 info->IER |= UART_IER_THRI; 1167 outb(info->IER, info->ioaddr + UART_IER); 1168 spin_unlock_irqrestore(&info->slock, flags); 1169 } 1170 } 1171 return 1; 1172 } 1173 1174 1175 static void mxser_flush_chars(struct tty_struct *tty) 1176 { 1177 struct mxser_port *info = tty->driver_data; 1178 unsigned long flags; 1179 1180 if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf || 1181 (tty->hw_stopped && info->type != PORT_16550A && 1182 !info->board->chip_flag)) 1183 return; 1184 1185 spin_lock_irqsave(&info->slock, flags); 1186 1187 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); 1188 info->IER |= UART_IER_THRI; 1189 outb(info->IER, info->ioaddr + UART_IER); 1190 1191 spin_unlock_irqrestore(&info->slock, flags); 1192 } 1193 1194 static int mxser_write_room(struct tty_struct *tty) 1195 { 1196 struct mxser_port *info = tty->driver_data; 1197 int ret; 1198 1199 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1; 1200 return ret < 0 ? 0 : ret; 1201 } 1202 1203 static int mxser_chars_in_buffer(struct tty_struct *tty) 1204 { 1205 struct mxser_port *info = tty->driver_data; 1206 return info->xmit_cnt; 1207 } 1208 1209 /* 1210 * ------------------------------------------------------------ 1211 * friends of mxser_ioctl() 1212 * ------------------------------------------------------------ 1213 */ 1214 static int mxser_get_serial_info(struct tty_struct *tty, 1215 struct serial_struct __user *retinfo) 1216 { 1217 struct mxser_port *info = tty->driver_data; 1218 struct serial_struct tmp = { 1219 .type = info->type, 1220 .line = tty->index, 1221 .port = info->ioaddr, 1222 .irq = info->board->irq, 1223 .flags = info->port.flags, 1224 .baud_base = info->baud_base, 1225 .close_delay = info->port.close_delay, 1226 .closing_wait = info->port.closing_wait, 1227 .custom_divisor = info->custom_divisor, 1228 }; 1229 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 1230 return -EFAULT; 1231 return 0; 1232 } 1233 1234 static int mxser_set_serial_info(struct tty_struct *tty, 1235 struct serial_struct __user *new_info) 1236 { 1237 struct mxser_port *info = tty->driver_data; 1238 struct tty_port *port = &info->port; 1239 struct serial_struct new_serial; 1240 speed_t baud; 1241 unsigned long sl_flags; 1242 unsigned int flags; 1243 int retval = 0; 1244 1245 if (!new_info || !info->ioaddr) 1246 return -ENODEV; 1247 if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) 1248 return -EFAULT; 1249 1250 if (new_serial.irq != info->board->irq || 1251 new_serial.port != info->ioaddr) 1252 return -EINVAL; 1253 1254 flags = port->flags & ASYNC_SPD_MASK; 1255 1256 if (!capable(CAP_SYS_ADMIN)) { 1257 if ((new_serial.baud_base != info->baud_base) || 1258 (new_serial.close_delay != info->port.close_delay) || 1259 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK))) 1260 return -EPERM; 1261 info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) | 1262 (new_serial.flags & ASYNC_USR_MASK)); 1263 } else { 1264 /* 1265 * OK, past this point, all the error checking has been done. 1266 * At this point, we start making changes..... 1267 */ 1268 port->flags = ((port->flags & ~ASYNC_FLAGS) | 1269 (new_serial.flags & ASYNC_FLAGS)); 1270 port->close_delay = new_serial.close_delay * HZ / 100; 1271 port->closing_wait = new_serial.closing_wait * HZ / 100; 1272 port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0; 1273 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST && 1274 (new_serial.baud_base != info->baud_base || 1275 new_serial.custom_divisor != 1276 info->custom_divisor)) { 1277 if (new_serial.custom_divisor == 0) 1278 return -EINVAL; 1279 baud = new_serial.baud_base / new_serial.custom_divisor; 1280 tty_encode_baud_rate(tty, baud, baud); 1281 } 1282 } 1283 1284 info->type = new_serial.type; 1285 1286 process_txrx_fifo(info); 1287 1288 if (tty_port_initialized(port)) { 1289 if (flags != (port->flags & ASYNC_SPD_MASK)) { 1290 spin_lock_irqsave(&info->slock, sl_flags); 1291 mxser_change_speed(tty); 1292 spin_unlock_irqrestore(&info->slock, sl_flags); 1293 } 1294 } else { 1295 retval = mxser_activate(port, tty); 1296 if (retval == 0) 1297 tty_port_set_initialized(port, 1); 1298 } 1299 return retval; 1300 } 1301 1302 /* 1303 * mxser_get_lsr_info - get line status register info 1304 * 1305 * Purpose: Let user call ioctl() to get info when the UART physically 1306 * is emptied. On bus types like RS485, the transmitter must 1307 * release the bus after transmitting. This must be done when 1308 * the transmit shift register is empty, not be done when the 1309 * transmit holding register is empty. This functionality 1310 * allows an RS485 driver to be written in user space. 1311 */ 1312 static int mxser_get_lsr_info(struct mxser_port *info, 1313 unsigned int __user *value) 1314 { 1315 unsigned char status; 1316 unsigned int result; 1317 unsigned long flags; 1318 1319 spin_lock_irqsave(&info->slock, flags); 1320 status = inb(info->ioaddr + UART_LSR); 1321 spin_unlock_irqrestore(&info->slock, flags); 1322 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0); 1323 return put_user(result, value); 1324 } 1325 1326 static int mxser_tiocmget(struct tty_struct *tty) 1327 { 1328 struct mxser_port *info = tty->driver_data; 1329 unsigned char control, status; 1330 unsigned long flags; 1331 1332 1333 if (tty->index == MXSER_PORTS) 1334 return -ENOIOCTLCMD; 1335 if (tty_io_error(tty)) 1336 return -EIO; 1337 1338 control = info->MCR; 1339 1340 spin_lock_irqsave(&info->slock, flags); 1341 status = inb(info->ioaddr + UART_MSR); 1342 if (status & UART_MSR_ANY_DELTA) 1343 mxser_check_modem_status(tty, info, status); 1344 spin_unlock_irqrestore(&info->slock, flags); 1345 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) | 1346 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) | 1347 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) | 1348 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) | 1349 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) | 1350 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0); 1351 } 1352 1353 static int mxser_tiocmset(struct tty_struct *tty, 1354 unsigned int set, unsigned int clear) 1355 { 1356 struct mxser_port *info = tty->driver_data; 1357 unsigned long flags; 1358 1359 1360 if (tty->index == MXSER_PORTS) 1361 return -ENOIOCTLCMD; 1362 if (tty_io_error(tty)) 1363 return -EIO; 1364 1365 spin_lock_irqsave(&info->slock, flags); 1366 1367 if (set & TIOCM_RTS) 1368 info->MCR |= UART_MCR_RTS; 1369 if (set & TIOCM_DTR) 1370 info->MCR |= UART_MCR_DTR; 1371 1372 if (clear & TIOCM_RTS) 1373 info->MCR &= ~UART_MCR_RTS; 1374 if (clear & TIOCM_DTR) 1375 info->MCR &= ~UART_MCR_DTR; 1376 1377 outb(info->MCR, info->ioaddr + UART_MCR); 1378 spin_unlock_irqrestore(&info->slock, flags); 1379 return 0; 1380 } 1381 1382 static int __init mxser_program_mode(int port) 1383 { 1384 int id, i, j, n; 1385 1386 outb(0, port); 1387 outb(0, port); 1388 outb(0, port); 1389 (void)inb(port); 1390 (void)inb(port); 1391 outb(0, port); 1392 (void)inb(port); 1393 1394 id = inb(port + 1) & 0x1F; 1395 if ((id != C168_ASIC_ID) && 1396 (id != C104_ASIC_ID) && 1397 (id != C102_ASIC_ID) && 1398 (id != CI132_ASIC_ID) && 1399 (id != CI134_ASIC_ID) && 1400 (id != CI104J_ASIC_ID)) 1401 return -1; 1402 for (i = 0, j = 0; i < 4; i++) { 1403 n = inb(port + 2); 1404 if (n == 'M') { 1405 j = 1; 1406 } else if ((j == 1) && (n == 1)) { 1407 j = 2; 1408 break; 1409 } else 1410 j = 0; 1411 } 1412 if (j != 2) 1413 id = -2; 1414 return id; 1415 } 1416 1417 static void __init mxser_normal_mode(int port) 1418 { 1419 int i, n; 1420 1421 outb(0xA5, port + 1); 1422 outb(0x80, port + 3); 1423 outb(12, port + 0); /* 9600 bps */ 1424 outb(0, port + 1); 1425 outb(0x03, port + 3); /* 8 data bits */ 1426 outb(0x13, port + 4); /* loop back mode */ 1427 for (i = 0; i < 16; i++) { 1428 n = inb(port + 5); 1429 if ((n & 0x61) == 0x60) 1430 break; 1431 if ((n & 1) == 1) 1432 (void)inb(port); 1433 } 1434 outb(0x00, port + 4); 1435 } 1436 1437 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */ 1438 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */ 1439 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */ 1440 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */ 1441 #define EN_CCMD 0x000 /* Chip's command register */ 1442 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */ 1443 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */ 1444 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */ 1445 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */ 1446 #define EN0_DCFG 0x00E /* Data configuration reg WR */ 1447 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */ 1448 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */ 1449 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */ 1450 static int __init mxser_read_register(int port, unsigned short *regs) 1451 { 1452 int i, k, value, id; 1453 unsigned int j; 1454 1455 id = mxser_program_mode(port); 1456 if (id < 0) 1457 return id; 1458 for (i = 0; i < 14; i++) { 1459 k = (i & 0x3F) | 0x180; 1460 for (j = 0x100; j > 0; j >>= 1) { 1461 outb(CHIP_CS, port); 1462 if (k & j) { 1463 outb(CHIP_CS | CHIP_DO, port); 1464 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */ 1465 } else { 1466 outb(CHIP_CS, port); 1467 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */ 1468 } 1469 } 1470 (void)inb(port); 1471 value = 0; 1472 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) { 1473 outb(CHIP_CS, port); 1474 outb(CHIP_CS | CHIP_SK, port); 1475 if (inb(port) & CHIP_DI) 1476 value |= j; 1477 } 1478 regs[i] = value; 1479 outb(0, port); 1480 } 1481 mxser_normal_mode(port); 1482 return id; 1483 } 1484 1485 static int mxser_ioctl_special(unsigned int cmd, void __user *argp) 1486 { 1487 struct mxser_port *ip; 1488 struct tty_port *port; 1489 struct tty_struct *tty; 1490 int result, status; 1491 unsigned int i, j; 1492 int ret = 0; 1493 1494 switch (cmd) { 1495 case MOXA_GET_MAJOR: 1496 printk_ratelimited(KERN_WARNING "mxser: '%s' uses deprecated ioctl " 1497 "%x (GET_MAJOR), fix your userspace\n", 1498 current->comm, cmd); 1499 return put_user(ttymajor, (int __user *)argp); 1500 1501 case MOXA_CHKPORTENABLE: 1502 result = 0; 1503 for (i = 0; i < MXSER_BOARDS; i++) 1504 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) 1505 if (mxser_boards[i].ports[j].ioaddr) 1506 result |= (1 << i); 1507 return put_user(result, (unsigned long __user *)argp); 1508 case MOXA_GETDATACOUNT: 1509 /* The receive side is locked by port->slock but it isn't 1510 clear that an exact snapshot is worth copying here */ 1511 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log))) 1512 ret = -EFAULT; 1513 return ret; 1514 case MOXA_GETMSTATUS: { 1515 struct mxser_mstatus ms, __user *msu = argp; 1516 for (i = 0; i < MXSER_BOARDS; i++) 1517 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) { 1518 ip = &mxser_boards[i].ports[j]; 1519 port = &ip->port; 1520 memset(&ms, 0, sizeof(ms)); 1521 1522 mutex_lock(&port->mutex); 1523 if (!ip->ioaddr) 1524 goto copy; 1525 1526 tty = tty_port_tty_get(port); 1527 1528 if (!tty) 1529 ms.cflag = ip->normal_termios.c_cflag; 1530 else 1531 ms.cflag = tty->termios.c_cflag; 1532 tty_kref_put(tty); 1533 spin_lock_irq(&ip->slock); 1534 status = inb(ip->ioaddr + UART_MSR); 1535 spin_unlock_irq(&ip->slock); 1536 if (status & UART_MSR_DCD) 1537 ms.dcd = 1; 1538 if (status & UART_MSR_DSR) 1539 ms.dsr = 1; 1540 if (status & UART_MSR_CTS) 1541 ms.cts = 1; 1542 copy: 1543 mutex_unlock(&port->mutex); 1544 if (copy_to_user(msu, &ms, sizeof(ms))) 1545 return -EFAULT; 1546 msu++; 1547 } 1548 return 0; 1549 } 1550 case MOXA_ASPP_MON_EXT: { 1551 struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */ 1552 unsigned int cflag, iflag, p; 1553 u8 opmode; 1554 1555 me = kzalloc(sizeof(*me), GFP_KERNEL); 1556 if (!me) 1557 return -ENOMEM; 1558 1559 for (i = 0, p = 0; i < MXSER_BOARDS; i++) { 1560 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) { 1561 if (p >= ARRAY_SIZE(me->rx_cnt)) { 1562 i = MXSER_BOARDS; 1563 break; 1564 } 1565 ip = &mxser_boards[i].ports[j]; 1566 port = &ip->port; 1567 1568 mutex_lock(&port->mutex); 1569 if (!ip->ioaddr) { 1570 mutex_unlock(&port->mutex); 1571 continue; 1572 } 1573 1574 spin_lock_irq(&ip->slock); 1575 status = mxser_get_msr(ip->ioaddr, 0, p); 1576 1577 if (status & UART_MSR_TERI) 1578 ip->icount.rng++; 1579 if (status & UART_MSR_DDSR) 1580 ip->icount.dsr++; 1581 if (status & UART_MSR_DDCD) 1582 ip->icount.dcd++; 1583 if (status & UART_MSR_DCTS) 1584 ip->icount.cts++; 1585 1586 ip->mon_data.modem_status = status; 1587 me->rx_cnt[p] = ip->mon_data.rxcnt; 1588 me->tx_cnt[p] = ip->mon_data.txcnt; 1589 me->up_rxcnt[p] = ip->mon_data.up_rxcnt; 1590 me->up_txcnt[p] = ip->mon_data.up_txcnt; 1591 me->modem_status[p] = 1592 ip->mon_data.modem_status; 1593 spin_unlock_irq(&ip->slock); 1594 1595 tty = tty_port_tty_get(&ip->port); 1596 1597 if (!tty) { 1598 cflag = ip->normal_termios.c_cflag; 1599 iflag = ip->normal_termios.c_iflag; 1600 me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios); 1601 } else { 1602 cflag = tty->termios.c_cflag; 1603 iflag = tty->termios.c_iflag; 1604 me->baudrate[p] = tty_get_baud_rate(tty); 1605 } 1606 tty_kref_put(tty); 1607 1608 me->databits[p] = cflag & CSIZE; 1609 me->stopbits[p] = cflag & CSTOPB; 1610 me->parity[p] = cflag & (PARENB | PARODD | 1611 CMSPAR); 1612 1613 if (cflag & CRTSCTS) 1614 me->flowctrl[p] |= 0x03; 1615 1616 if (iflag & (IXON | IXOFF)) 1617 me->flowctrl[p] |= 0x0C; 1618 1619 if (ip->type == PORT_16550A) 1620 me->fifo[p] = 1; 1621 1622 if (ip->board->chip_flag == MOXA_MUST_MU860_HWID) { 1623 opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2); 1624 opmode &= OP_MODE_MASK; 1625 } else { 1626 opmode = RS232_MODE; 1627 } 1628 me->iftype[p] = opmode; 1629 mutex_unlock(&port->mutex); 1630 } 1631 } 1632 if (copy_to_user(argp, me, sizeof(*me))) 1633 ret = -EFAULT; 1634 kfree(me); 1635 return ret; 1636 } 1637 default: 1638 return -ENOIOCTLCMD; 1639 } 1640 return 0; 1641 } 1642 1643 static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg, 1644 struct async_icount *cprev) 1645 { 1646 struct async_icount cnow; 1647 unsigned long flags; 1648 int ret; 1649 1650 spin_lock_irqsave(&info->slock, flags); 1651 cnow = info->icount; /* atomic copy */ 1652 spin_unlock_irqrestore(&info->slock, flags); 1653 1654 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) || 1655 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) || 1656 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) || 1657 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts)); 1658 1659 *cprev = cnow; 1660 1661 return ret; 1662 } 1663 1664 static int mxser_ioctl(struct tty_struct *tty, 1665 unsigned int cmd, unsigned long arg) 1666 { 1667 struct mxser_port *info = tty->driver_data; 1668 struct tty_port *port = &info->port; 1669 struct async_icount cnow; 1670 unsigned long flags; 1671 void __user *argp = (void __user *)arg; 1672 int retval; 1673 1674 if (tty->index == MXSER_PORTS) 1675 return mxser_ioctl_special(cmd, argp); 1676 1677 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) { 1678 int p; 1679 unsigned long opmode; 1680 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f }; 1681 int shiftbit; 1682 unsigned char val, mask; 1683 1684 if (info->board->chip_flag != MOXA_MUST_MU860_HWID) 1685 return -EFAULT; 1686 1687 p = tty->index % 4; 1688 if (cmd == MOXA_SET_OP_MODE) { 1689 if (get_user(opmode, (int __user *) argp)) 1690 return -EFAULT; 1691 if (opmode != RS232_MODE && 1692 opmode != RS485_2WIRE_MODE && 1693 opmode != RS422_MODE && 1694 opmode != RS485_4WIRE_MODE) 1695 return -EFAULT; 1696 mask = ModeMask[p]; 1697 shiftbit = p * 2; 1698 spin_lock_irq(&info->slock); 1699 val = inb(info->opmode_ioaddr); 1700 val &= mask; 1701 val |= (opmode << shiftbit); 1702 outb(val, info->opmode_ioaddr); 1703 spin_unlock_irq(&info->slock); 1704 } else { 1705 shiftbit = p * 2; 1706 spin_lock_irq(&info->slock); 1707 opmode = inb(info->opmode_ioaddr) >> shiftbit; 1708 spin_unlock_irq(&info->slock); 1709 opmode &= OP_MODE_MASK; 1710 if (put_user(opmode, (int __user *)argp)) 1711 return -EFAULT; 1712 } 1713 return 0; 1714 } 1715 1716 if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && tty_io_error(tty)) 1717 return -EIO; 1718 1719 switch (cmd) { 1720 case TIOCGSERIAL: 1721 mutex_lock(&port->mutex); 1722 retval = mxser_get_serial_info(tty, argp); 1723 mutex_unlock(&port->mutex); 1724 return retval; 1725 case TIOCSSERIAL: 1726 mutex_lock(&port->mutex); 1727 retval = mxser_set_serial_info(tty, argp); 1728 mutex_unlock(&port->mutex); 1729 return retval; 1730 case TIOCSERGETLSR: /* Get line status register */ 1731 return mxser_get_lsr_info(info, argp); 1732 /* 1733 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1734 * - mask passed in arg for lines of interest 1735 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1736 * Caller should use TIOCGICOUNT to see which one it was 1737 */ 1738 case TIOCMIWAIT: 1739 spin_lock_irqsave(&info->slock, flags); 1740 cnow = info->icount; /* note the counters on entry */ 1741 spin_unlock_irqrestore(&info->slock, flags); 1742 1743 return wait_event_interruptible(info->port.delta_msr_wait, 1744 mxser_cflags_changed(info, arg, &cnow)); 1745 case MOXA_HighSpeedOn: 1746 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp); 1747 case MOXA_SDS_RSTICOUNTER: 1748 spin_lock_irq(&info->slock); 1749 info->mon_data.rxcnt = 0; 1750 info->mon_data.txcnt = 0; 1751 spin_unlock_irq(&info->slock); 1752 return 0; 1753 1754 case MOXA_ASPP_OQUEUE:{ 1755 int len, lsr; 1756 1757 len = mxser_chars_in_buffer(tty); 1758 spin_lock_irq(&info->slock); 1759 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE; 1760 spin_unlock_irq(&info->slock); 1761 len += (lsr ? 0 : 1); 1762 1763 return put_user(len, (int __user *)argp); 1764 } 1765 case MOXA_ASPP_MON: { 1766 int mcr, status; 1767 1768 spin_lock_irq(&info->slock); 1769 status = mxser_get_msr(info->ioaddr, 1, tty->index); 1770 mxser_check_modem_status(tty, info, status); 1771 1772 mcr = inb(info->ioaddr + UART_MCR); 1773 spin_unlock_irq(&info->slock); 1774 1775 if (mcr & MOXA_MUST_MCR_XON_FLAG) 1776 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD; 1777 else 1778 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD; 1779 1780 if (mcr & MOXA_MUST_MCR_TX_XON) 1781 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT; 1782 else 1783 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT; 1784 1785 if (tty->hw_stopped) 1786 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD; 1787 else 1788 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD; 1789 1790 if (copy_to_user(argp, &info->mon_data, 1791 sizeof(struct mxser_mon))) 1792 return -EFAULT; 1793 1794 return 0; 1795 } 1796 case MOXA_ASPP_LSTATUS: { 1797 if (put_user(info->err_shadow, (unsigned char __user *)argp)) 1798 return -EFAULT; 1799 1800 info->err_shadow = 0; 1801 return 0; 1802 } 1803 case MOXA_SET_BAUD_METHOD: { 1804 int method; 1805 1806 if (get_user(method, (int __user *)argp)) 1807 return -EFAULT; 1808 mxser_set_baud_method[tty->index] = method; 1809 return put_user(method, (int __user *)argp); 1810 } 1811 default: 1812 return -ENOIOCTLCMD; 1813 } 1814 return 0; 1815 } 1816 1817 /* 1818 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1819 * Return: write counters to the user passed counter struct 1820 * NB: both 1->0 and 0->1 transitions are counted except for 1821 * RI where only 0->1 is counted. 1822 */ 1823 1824 static int mxser_get_icount(struct tty_struct *tty, 1825 struct serial_icounter_struct *icount) 1826 1827 { 1828 struct mxser_port *info = tty->driver_data; 1829 struct async_icount cnow; 1830 unsigned long flags; 1831 1832 spin_lock_irqsave(&info->slock, flags); 1833 cnow = info->icount; 1834 spin_unlock_irqrestore(&info->slock, flags); 1835 1836 icount->frame = cnow.frame; 1837 icount->brk = cnow.brk; 1838 icount->overrun = cnow.overrun; 1839 icount->buf_overrun = cnow.buf_overrun; 1840 icount->parity = cnow.parity; 1841 icount->rx = cnow.rx; 1842 icount->tx = cnow.tx; 1843 icount->cts = cnow.cts; 1844 icount->dsr = cnow.dsr; 1845 icount->rng = cnow.rng; 1846 icount->dcd = cnow.dcd; 1847 return 0; 1848 } 1849 1850 static void mxser_stoprx(struct tty_struct *tty) 1851 { 1852 struct mxser_port *info = tty->driver_data; 1853 1854 info->ldisc_stop_rx = 1; 1855 if (I_IXOFF(tty)) { 1856 if (info->board->chip_flag) { 1857 info->IER &= ~MOXA_MUST_RECV_ISR; 1858 outb(info->IER, info->ioaddr + UART_IER); 1859 } else { 1860 info->x_char = STOP_CHAR(tty); 1861 outb(0, info->ioaddr + UART_IER); 1862 info->IER |= UART_IER_THRI; 1863 outb(info->IER, info->ioaddr + UART_IER); 1864 } 1865 } 1866 1867 if (C_CRTSCTS(tty)) { 1868 info->MCR &= ~UART_MCR_RTS; 1869 outb(info->MCR, info->ioaddr + UART_MCR); 1870 } 1871 } 1872 1873 /* 1874 * This routine is called by the upper-layer tty layer to signal that 1875 * incoming characters should be throttled. 1876 */ 1877 static void mxser_throttle(struct tty_struct *tty) 1878 { 1879 mxser_stoprx(tty); 1880 } 1881 1882 static void mxser_unthrottle(struct tty_struct *tty) 1883 { 1884 struct mxser_port *info = tty->driver_data; 1885 1886 /* startrx */ 1887 info->ldisc_stop_rx = 0; 1888 if (I_IXOFF(tty)) { 1889 if (info->x_char) 1890 info->x_char = 0; 1891 else { 1892 if (info->board->chip_flag) { 1893 info->IER |= MOXA_MUST_RECV_ISR; 1894 outb(info->IER, info->ioaddr + UART_IER); 1895 } else { 1896 info->x_char = START_CHAR(tty); 1897 outb(0, info->ioaddr + UART_IER); 1898 info->IER |= UART_IER_THRI; 1899 outb(info->IER, info->ioaddr + UART_IER); 1900 } 1901 } 1902 } 1903 1904 if (C_CRTSCTS(tty)) { 1905 info->MCR |= UART_MCR_RTS; 1906 outb(info->MCR, info->ioaddr + UART_MCR); 1907 } 1908 } 1909 1910 /* 1911 * mxser_stop() and mxser_start() 1912 * 1913 * This routines are called before setting or resetting tty->stopped. 1914 * They enable or disable transmitter interrupts, as necessary. 1915 */ 1916 static void mxser_stop(struct tty_struct *tty) 1917 { 1918 struct mxser_port *info = tty->driver_data; 1919 unsigned long flags; 1920 1921 spin_lock_irqsave(&info->slock, flags); 1922 if (info->IER & UART_IER_THRI) { 1923 info->IER &= ~UART_IER_THRI; 1924 outb(info->IER, info->ioaddr + UART_IER); 1925 } 1926 spin_unlock_irqrestore(&info->slock, flags); 1927 } 1928 1929 static void mxser_start(struct tty_struct *tty) 1930 { 1931 struct mxser_port *info = tty->driver_data; 1932 unsigned long flags; 1933 1934 spin_lock_irqsave(&info->slock, flags); 1935 if (info->xmit_cnt && info->port.xmit_buf) { 1936 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); 1937 info->IER |= UART_IER_THRI; 1938 outb(info->IER, info->ioaddr + UART_IER); 1939 } 1940 spin_unlock_irqrestore(&info->slock, flags); 1941 } 1942 1943 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios) 1944 { 1945 struct mxser_port *info = tty->driver_data; 1946 unsigned long flags; 1947 1948 spin_lock_irqsave(&info->slock, flags); 1949 mxser_change_speed(tty); 1950 spin_unlock_irqrestore(&info->slock, flags); 1951 1952 if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) { 1953 tty->hw_stopped = 0; 1954 mxser_start(tty); 1955 } 1956 1957 /* Handle sw stopped */ 1958 if ((old_termios->c_iflag & IXON) && !I_IXON(tty)) { 1959 tty->stopped = 0; 1960 1961 if (info->board->chip_flag) { 1962 spin_lock_irqsave(&info->slock, flags); 1963 mxser_disable_must_rx_software_flow_control( 1964 info->ioaddr); 1965 spin_unlock_irqrestore(&info->slock, flags); 1966 } 1967 1968 mxser_start(tty); 1969 } 1970 } 1971 1972 /* 1973 * mxser_wait_until_sent() --- wait until the transmitter is empty 1974 */ 1975 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout) 1976 { 1977 struct mxser_port *info = tty->driver_data; 1978 unsigned long orig_jiffies, char_time; 1979 unsigned long flags; 1980 int lsr; 1981 1982 if (info->type == PORT_UNKNOWN) 1983 return; 1984 1985 if (info->xmit_fifo_size == 0) 1986 return; /* Just in case.... */ 1987 1988 orig_jiffies = jiffies; 1989 /* 1990 * Set the check interval to be 1/5 of the estimated time to 1991 * send a single character, and make it at least 1. The check 1992 * interval should also be less than the timeout. 1993 * 1994 * Note: we have to use pretty tight timings here to satisfy 1995 * the NIST-PCTS. 1996 */ 1997 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size; 1998 char_time = char_time / 5; 1999 if (char_time == 0) 2000 char_time = 1; 2001 if (timeout && timeout < char_time) 2002 char_time = timeout; 2003 /* 2004 * If the transmitter hasn't cleared in twice the approximate 2005 * amount of time to send the entire FIFO, it probably won't 2006 * ever clear. This assumes the UART isn't doing flow 2007 * control, which is currently the case. Hence, if it ever 2008 * takes longer than info->timeout, this is probably due to a 2009 * UART bug of some kind. So, we clamp the timeout parameter at 2010 * 2*info->timeout. 2011 */ 2012 if (!timeout || timeout > 2 * info->timeout) 2013 timeout = 2 * info->timeout; 2014 2015 spin_lock_irqsave(&info->slock, flags); 2016 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) { 2017 spin_unlock_irqrestore(&info->slock, flags); 2018 schedule_timeout_interruptible(char_time); 2019 spin_lock_irqsave(&info->slock, flags); 2020 if (signal_pending(current)) 2021 break; 2022 if (timeout && time_after(jiffies, orig_jiffies + timeout)) 2023 break; 2024 } 2025 spin_unlock_irqrestore(&info->slock, flags); 2026 set_current_state(TASK_RUNNING); 2027 } 2028 2029 /* 2030 * This routine is called by tty_hangup() when a hangup is signaled. 2031 */ 2032 static void mxser_hangup(struct tty_struct *tty) 2033 { 2034 struct mxser_port *info = tty->driver_data; 2035 2036 mxser_flush_buffer(tty); 2037 tty_port_hangup(&info->port); 2038 } 2039 2040 /* 2041 * mxser_rs_break() --- routine which turns the break handling on or off 2042 */ 2043 static int mxser_rs_break(struct tty_struct *tty, int break_state) 2044 { 2045 struct mxser_port *info = tty->driver_data; 2046 unsigned long flags; 2047 2048 spin_lock_irqsave(&info->slock, flags); 2049 if (break_state == -1) 2050 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC, 2051 info->ioaddr + UART_LCR); 2052 else 2053 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC, 2054 info->ioaddr + UART_LCR); 2055 spin_unlock_irqrestore(&info->slock, flags); 2056 return 0; 2057 } 2058 2059 static void mxser_receive_chars(struct tty_struct *tty, 2060 struct mxser_port *port, int *status) 2061 { 2062 unsigned char ch, gdl; 2063 int ignored = 0; 2064 int cnt = 0; 2065 int recv_room; 2066 int max = 256; 2067 2068 recv_room = tty->receive_room; 2069 if (recv_room == 0 && !port->ldisc_stop_rx) 2070 mxser_stoprx(tty); 2071 if (port->board->chip_flag != MOXA_OTHER_UART) { 2072 2073 if (*status & UART_LSR_SPECIAL) 2074 goto intr_old; 2075 if (port->board->chip_flag == MOXA_MUST_MU860_HWID && 2076 (*status & MOXA_MUST_LSR_RERR)) 2077 goto intr_old; 2078 if (*status & MOXA_MUST_LSR_RERR) 2079 goto intr_old; 2080 2081 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER); 2082 2083 if (port->board->chip_flag == MOXA_MUST_MU150_HWID) 2084 gdl &= MOXA_MUST_GDL_MASK; 2085 if (gdl >= recv_room) { 2086 if (!port->ldisc_stop_rx) 2087 mxser_stoprx(tty); 2088 } 2089 while (gdl--) { 2090 ch = inb(port->ioaddr + UART_RX); 2091 tty_insert_flip_char(&port->port, ch, 0); 2092 cnt++; 2093 } 2094 goto end_intr; 2095 } 2096 intr_old: 2097 2098 do { 2099 if (max-- < 0) 2100 break; 2101 2102 ch = inb(port->ioaddr + UART_RX); 2103 if (port->board->chip_flag && (*status & UART_LSR_OE)) 2104 outb(0x23, port->ioaddr + UART_FCR); 2105 *status &= port->read_status_mask; 2106 if (*status & port->ignore_status_mask) { 2107 if (++ignored > 100) 2108 break; 2109 } else { 2110 char flag = 0; 2111 if (*status & UART_LSR_SPECIAL) { 2112 if (*status & UART_LSR_BI) { 2113 flag = TTY_BREAK; 2114 port->icount.brk++; 2115 2116 if (port->port.flags & ASYNC_SAK) 2117 do_SAK(tty); 2118 } else if (*status & UART_LSR_PE) { 2119 flag = TTY_PARITY; 2120 port->icount.parity++; 2121 } else if (*status & UART_LSR_FE) { 2122 flag = TTY_FRAME; 2123 port->icount.frame++; 2124 } else if (*status & UART_LSR_OE) { 2125 flag = TTY_OVERRUN; 2126 port->icount.overrun++; 2127 } else 2128 flag = TTY_BREAK; 2129 } 2130 tty_insert_flip_char(&port->port, ch, flag); 2131 cnt++; 2132 if (cnt >= recv_room) { 2133 if (!port->ldisc_stop_rx) 2134 mxser_stoprx(tty); 2135 break; 2136 } 2137 2138 } 2139 2140 if (port->board->chip_flag) 2141 break; 2142 2143 *status = inb(port->ioaddr + UART_LSR); 2144 } while (*status & UART_LSR_DR); 2145 2146 end_intr: 2147 mxvar_log.rxcnt[tty->index] += cnt; 2148 port->mon_data.rxcnt += cnt; 2149 port->mon_data.up_rxcnt += cnt; 2150 2151 /* 2152 * We are called from an interrupt context with &port->slock 2153 * being held. Drop it temporarily in order to prevent 2154 * recursive locking. 2155 */ 2156 spin_unlock(&port->slock); 2157 tty_flip_buffer_push(&port->port); 2158 spin_lock(&port->slock); 2159 } 2160 2161 static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port) 2162 { 2163 int count, cnt; 2164 2165 if (port->x_char) { 2166 outb(port->x_char, port->ioaddr + UART_TX); 2167 port->x_char = 0; 2168 mxvar_log.txcnt[tty->index]++; 2169 port->mon_data.txcnt++; 2170 port->mon_data.up_txcnt++; 2171 port->icount.tx++; 2172 return; 2173 } 2174 2175 if (port->port.xmit_buf == NULL) 2176 return; 2177 2178 if (port->xmit_cnt <= 0 || tty->stopped || 2179 (tty->hw_stopped && 2180 (port->type != PORT_16550A) && 2181 (!port->board->chip_flag))) { 2182 port->IER &= ~UART_IER_THRI; 2183 outb(port->IER, port->ioaddr + UART_IER); 2184 return; 2185 } 2186 2187 cnt = port->xmit_cnt; 2188 count = port->xmit_fifo_size; 2189 do { 2190 outb(port->port.xmit_buf[port->xmit_tail++], 2191 port->ioaddr + UART_TX); 2192 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1); 2193 if (--port->xmit_cnt <= 0) 2194 break; 2195 } while (--count > 0); 2196 mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt); 2197 2198 port->mon_data.txcnt += (cnt - port->xmit_cnt); 2199 port->mon_data.up_txcnt += (cnt - port->xmit_cnt); 2200 port->icount.tx += (cnt - port->xmit_cnt); 2201 2202 if (port->xmit_cnt < WAKEUP_CHARS) 2203 tty_wakeup(tty); 2204 2205 if (port->xmit_cnt <= 0) { 2206 port->IER &= ~UART_IER_THRI; 2207 outb(port->IER, port->ioaddr + UART_IER); 2208 } 2209 } 2210 2211 /* 2212 * This is the serial driver's generic interrupt routine 2213 */ 2214 static irqreturn_t mxser_interrupt(int irq, void *dev_id) 2215 { 2216 int status, iir, i; 2217 struct mxser_board *brd = NULL; 2218 struct mxser_port *port; 2219 int max, irqbits, bits, msr; 2220 unsigned int int_cnt, pass_counter = 0; 2221 int handled = IRQ_NONE; 2222 struct tty_struct *tty; 2223 2224 for (i = 0; i < MXSER_BOARDS; i++) 2225 if (dev_id == &mxser_boards[i]) { 2226 brd = dev_id; 2227 break; 2228 } 2229 2230 if (i == MXSER_BOARDS) 2231 goto irq_stop; 2232 if (brd == NULL) 2233 goto irq_stop; 2234 max = brd->info->nports; 2235 while (pass_counter++ < MXSER_ISR_PASS_LIMIT) { 2236 irqbits = inb(brd->vector) & brd->vector_mask; 2237 if (irqbits == brd->vector_mask) 2238 break; 2239 2240 handled = IRQ_HANDLED; 2241 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) { 2242 if (irqbits == brd->vector_mask) 2243 break; 2244 if (bits & irqbits) 2245 continue; 2246 port = &brd->ports[i]; 2247 2248 int_cnt = 0; 2249 spin_lock(&port->slock); 2250 do { 2251 iir = inb(port->ioaddr + UART_IIR); 2252 if (iir & UART_IIR_NO_INT) 2253 break; 2254 iir &= MOXA_MUST_IIR_MASK; 2255 tty = tty_port_tty_get(&port->port); 2256 if (!tty || port->closing || 2257 !tty_port_initialized(&port->port)) { 2258 status = inb(port->ioaddr + UART_LSR); 2259 outb(0x27, port->ioaddr + UART_FCR); 2260 inb(port->ioaddr + UART_MSR); 2261 tty_kref_put(tty); 2262 break; 2263 } 2264 2265 status = inb(port->ioaddr + UART_LSR); 2266 2267 if (status & UART_LSR_PE) 2268 port->err_shadow |= NPPI_NOTIFY_PARITY; 2269 if (status & UART_LSR_FE) 2270 port->err_shadow |= NPPI_NOTIFY_FRAMING; 2271 if (status & UART_LSR_OE) 2272 port->err_shadow |= 2273 NPPI_NOTIFY_HW_OVERRUN; 2274 if (status & UART_LSR_BI) 2275 port->err_shadow |= NPPI_NOTIFY_BREAK; 2276 2277 if (port->board->chip_flag) { 2278 if (iir == MOXA_MUST_IIR_GDA || 2279 iir == MOXA_MUST_IIR_RDA || 2280 iir == MOXA_MUST_IIR_RTO || 2281 iir == MOXA_MUST_IIR_LSR) 2282 mxser_receive_chars(tty, port, 2283 &status); 2284 2285 } else { 2286 status &= port->read_status_mask; 2287 if (status & UART_LSR_DR) 2288 mxser_receive_chars(tty, port, 2289 &status); 2290 } 2291 msr = inb(port->ioaddr + UART_MSR); 2292 if (msr & UART_MSR_ANY_DELTA) 2293 mxser_check_modem_status(tty, port, msr); 2294 2295 if (port->board->chip_flag) { 2296 if (iir == 0x02 && (status & 2297 UART_LSR_THRE)) 2298 mxser_transmit_chars(tty, port); 2299 } else { 2300 if (status & UART_LSR_THRE) 2301 mxser_transmit_chars(tty, port); 2302 } 2303 tty_kref_put(tty); 2304 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT); 2305 spin_unlock(&port->slock); 2306 } 2307 } 2308 2309 irq_stop: 2310 return handled; 2311 } 2312 2313 static const struct tty_operations mxser_ops = { 2314 .open = mxser_open, 2315 .close = mxser_close, 2316 .write = mxser_write, 2317 .put_char = mxser_put_char, 2318 .flush_chars = mxser_flush_chars, 2319 .write_room = mxser_write_room, 2320 .chars_in_buffer = mxser_chars_in_buffer, 2321 .flush_buffer = mxser_flush_buffer, 2322 .ioctl = mxser_ioctl, 2323 .throttle = mxser_throttle, 2324 .unthrottle = mxser_unthrottle, 2325 .set_termios = mxser_set_termios, 2326 .stop = mxser_stop, 2327 .start = mxser_start, 2328 .hangup = mxser_hangup, 2329 .break_ctl = mxser_rs_break, 2330 .wait_until_sent = mxser_wait_until_sent, 2331 .tiocmget = mxser_tiocmget, 2332 .tiocmset = mxser_tiocmset, 2333 .get_icount = mxser_get_icount, 2334 }; 2335 2336 static const struct tty_port_operations mxser_port_ops = { 2337 .carrier_raised = mxser_carrier_raised, 2338 .dtr_rts = mxser_dtr_rts, 2339 .activate = mxser_activate, 2340 .shutdown = mxser_shutdown_port, 2341 }; 2342 2343 /* 2344 * The MOXA Smartio/Industio serial driver boot-time initialization code! 2345 */ 2346 2347 static bool allow_overlapping_vector; 2348 module_param(allow_overlapping_vector, bool, S_IRUGO); 2349 MODULE_PARM_DESC(allow_overlapping_vector, "whether we allow ISA cards to be configured such that vector overlabs IO ports (default=no)"); 2350 2351 static bool mxser_overlapping_vector(struct mxser_board *brd) 2352 { 2353 return allow_overlapping_vector && 2354 brd->vector >= brd->ports[0].ioaddr && 2355 brd->vector < brd->ports[0].ioaddr + 8 * brd->info->nports; 2356 } 2357 2358 static int mxser_request_vector(struct mxser_board *brd) 2359 { 2360 if (mxser_overlapping_vector(brd)) 2361 return 0; 2362 return request_region(brd->vector, 1, "mxser(vector)") ? 0 : -EIO; 2363 } 2364 2365 static void mxser_release_vector(struct mxser_board *brd) 2366 { 2367 if (mxser_overlapping_vector(brd)) 2368 return; 2369 release_region(brd->vector, 1); 2370 } 2371 2372 static void mxser_release_ISA_res(struct mxser_board *brd) 2373 { 2374 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports); 2375 mxser_release_vector(brd); 2376 } 2377 2378 static int mxser_initbrd(struct mxser_board *brd) 2379 { 2380 struct mxser_port *info; 2381 unsigned int i; 2382 int retval; 2383 2384 printk(KERN_INFO "mxser: max. baud rate = %d bps\n", 2385 brd->ports[0].max_baud); 2386 2387 for (i = 0; i < brd->info->nports; i++) { 2388 info = &brd->ports[i]; 2389 tty_port_init(&info->port); 2390 info->port.ops = &mxser_port_ops; 2391 info->board = brd; 2392 info->stop_rx = 0; 2393 info->ldisc_stop_rx = 0; 2394 2395 /* Enhance mode enabled here */ 2396 if (brd->chip_flag != MOXA_OTHER_UART) 2397 mxser_enable_must_enchance_mode(info->ioaddr); 2398 2399 info->type = brd->uart_type; 2400 2401 process_txrx_fifo(info); 2402 2403 info->custom_divisor = info->baud_base * 16; 2404 info->port.close_delay = 5 * HZ / 10; 2405 info->port.closing_wait = 30 * HZ; 2406 info->normal_termios = mxvar_sdriver->init_termios; 2407 memset(&info->mon_data, 0, sizeof(struct mxser_mon)); 2408 info->err_shadow = 0; 2409 spin_lock_init(&info->slock); 2410 2411 /* before set INT ISR, disable all int */ 2412 outb(inb(info->ioaddr + UART_IER) & 0xf0, 2413 info->ioaddr + UART_IER); 2414 } 2415 2416 retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser", 2417 brd); 2418 if (retval) { 2419 for (i = 0; i < brd->info->nports; i++) 2420 tty_port_destroy(&brd->ports[i].port); 2421 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may " 2422 "conflict with another device.\n", 2423 brd->info->name, brd->irq); 2424 } 2425 2426 return retval; 2427 } 2428 2429 static void mxser_board_remove(struct mxser_board *brd) 2430 { 2431 unsigned int i; 2432 2433 for (i = 0; i < brd->info->nports; i++) { 2434 tty_unregister_device(mxvar_sdriver, brd->idx + i); 2435 tty_port_destroy(&brd->ports[i].port); 2436 } 2437 free_irq(brd->irq, brd); 2438 } 2439 2440 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd) 2441 { 2442 int id, i, bits, ret; 2443 unsigned short regs[16], irq; 2444 unsigned char scratch, scratch2; 2445 2446 brd->chip_flag = MOXA_OTHER_UART; 2447 2448 id = mxser_read_register(cap, regs); 2449 switch (id) { 2450 case C168_ASIC_ID: 2451 brd->info = &mxser_cards[0]; 2452 break; 2453 case C104_ASIC_ID: 2454 brd->info = &mxser_cards[1]; 2455 break; 2456 case CI104J_ASIC_ID: 2457 brd->info = &mxser_cards[2]; 2458 break; 2459 case C102_ASIC_ID: 2460 brd->info = &mxser_cards[5]; 2461 break; 2462 case CI132_ASIC_ID: 2463 brd->info = &mxser_cards[6]; 2464 break; 2465 case CI134_ASIC_ID: 2466 brd->info = &mxser_cards[7]; 2467 break; 2468 default: 2469 return 0; 2470 } 2471 2472 irq = 0; 2473 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?) 2474 Flag-hack checks if configuration should be read as 2-port here. */ 2475 if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) { 2476 irq = regs[9] & 0xF000; 2477 irq = irq | (irq >> 4); 2478 if (irq != (regs[9] & 0xFF00)) 2479 goto err_irqconflict; 2480 } else if (brd->info->nports == 4) { 2481 irq = regs[9] & 0xF000; 2482 irq = irq | (irq >> 4); 2483 irq = irq | (irq >> 8); 2484 if (irq != regs[9]) 2485 goto err_irqconflict; 2486 } else if (brd->info->nports == 8) { 2487 irq = regs[9] & 0xF000; 2488 irq = irq | (irq >> 4); 2489 irq = irq | (irq >> 8); 2490 if ((irq != regs[9]) || (irq != regs[10])) 2491 goto err_irqconflict; 2492 } 2493 2494 if (!irq) { 2495 printk(KERN_ERR "mxser: interrupt number unset\n"); 2496 return -EIO; 2497 } 2498 brd->irq = ((int)(irq & 0xF000) >> 12); 2499 for (i = 0; i < 8; i++) 2500 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8; 2501 if ((regs[12] & 0x80) == 0) { 2502 printk(KERN_ERR "mxser: invalid interrupt vector\n"); 2503 return -EIO; 2504 } 2505 brd->vector = (int)regs[11]; /* interrupt vector */ 2506 if (id == 1) 2507 brd->vector_mask = 0x00FF; 2508 else 2509 brd->vector_mask = 0x000F; 2510 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) { 2511 if (regs[12] & bits) { 2512 brd->ports[i].baud_base = 921600; 2513 brd->ports[i].max_baud = 921600; 2514 } else { 2515 brd->ports[i].baud_base = 115200; 2516 brd->ports[i].max_baud = 115200; 2517 } 2518 } 2519 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB); 2520 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR); 2521 outb(0, cap + UART_EFR); /* EFR is the same as FCR */ 2522 outb(scratch2, cap + UART_LCR); 2523 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR); 2524 scratch = inb(cap + UART_IIR); 2525 2526 if (scratch & 0xC0) 2527 brd->uart_type = PORT_16550A; 2528 else 2529 brd->uart_type = PORT_16450; 2530 if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports, 2531 "mxser(IO)")) { 2532 printk(KERN_ERR "mxser: can't request ports I/O region: " 2533 "0x%.8lx-0x%.8lx\n", 2534 brd->ports[0].ioaddr, brd->ports[0].ioaddr + 2535 8 * brd->info->nports - 1); 2536 return -EIO; 2537 } 2538 2539 ret = mxser_request_vector(brd); 2540 if (ret) { 2541 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports); 2542 printk(KERN_ERR "mxser: can't request interrupt vector region: " 2543 "0x%.8lx-0x%.8lx\n", 2544 brd->ports[0].ioaddr, brd->ports[0].ioaddr + 2545 8 * brd->info->nports - 1); 2546 return ret; 2547 } 2548 return brd->info->nports; 2549 2550 err_irqconflict: 2551 printk(KERN_ERR "mxser: invalid interrupt number\n"); 2552 return -EIO; 2553 } 2554 2555 static int mxser_probe(struct pci_dev *pdev, 2556 const struct pci_device_id *ent) 2557 { 2558 #ifdef CONFIG_PCI 2559 struct mxser_board *brd; 2560 unsigned int i, j; 2561 unsigned long ioaddress; 2562 struct device *tty_dev; 2563 int retval = -EINVAL; 2564 2565 for (i = 0; i < MXSER_BOARDS; i++) 2566 if (mxser_boards[i].info == NULL) 2567 break; 2568 2569 if (i >= MXSER_BOARDS) { 2570 dev_err(&pdev->dev, "too many boards found (maximum %d), board " 2571 "not configured\n", MXSER_BOARDS); 2572 goto err; 2573 } 2574 2575 brd = &mxser_boards[i]; 2576 brd->idx = i * MXSER_PORTS_PER_BOARD; 2577 dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n", 2578 mxser_cards[ent->driver_data].name, 2579 pdev->bus->number, PCI_SLOT(pdev->devfn)); 2580 2581 retval = pci_enable_device(pdev); 2582 if (retval) { 2583 dev_err(&pdev->dev, "PCI enable failed\n"); 2584 goto err; 2585 } 2586 2587 /* io address */ 2588 ioaddress = pci_resource_start(pdev, 2); 2589 retval = pci_request_region(pdev, 2, "mxser(IO)"); 2590 if (retval) 2591 goto err_dis; 2592 2593 brd->info = &mxser_cards[ent->driver_data]; 2594 for (i = 0; i < brd->info->nports; i++) 2595 brd->ports[i].ioaddr = ioaddress + 8 * i; 2596 2597 /* vector */ 2598 ioaddress = pci_resource_start(pdev, 3); 2599 retval = pci_request_region(pdev, 3, "mxser(vector)"); 2600 if (retval) 2601 goto err_zero; 2602 brd->vector = ioaddress; 2603 2604 /* irq */ 2605 brd->irq = pdev->irq; 2606 2607 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr); 2608 brd->uart_type = PORT_16550A; 2609 brd->vector_mask = 0; 2610 2611 for (i = 0; i < brd->info->nports; i++) { 2612 for (j = 0; j < UART_INFO_NUM; j++) { 2613 if (Gpci_uart_info[j].type == brd->chip_flag) { 2614 brd->ports[i].max_baud = 2615 Gpci_uart_info[j].max_baud; 2616 2617 /* exception....CP-102 */ 2618 if (brd->info->flags & MXSER_HIGHBAUD) 2619 brd->ports[i].max_baud = 921600; 2620 break; 2621 } 2622 } 2623 } 2624 2625 if (brd->chip_flag == MOXA_MUST_MU860_HWID) { 2626 for (i = 0; i < brd->info->nports; i++) { 2627 if (i < 4) 2628 brd->ports[i].opmode_ioaddr = ioaddress + 4; 2629 else 2630 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c; 2631 } 2632 outb(0, ioaddress + 4); /* default set to RS232 mode */ 2633 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */ 2634 } 2635 2636 for (i = 0; i < brd->info->nports; i++) { 2637 brd->vector_mask |= (1 << i); 2638 brd->ports[i].baud_base = 921600; 2639 } 2640 2641 /* mxser_initbrd will hook ISR. */ 2642 retval = mxser_initbrd(brd); 2643 if (retval) 2644 goto err_rel3; 2645 2646 for (i = 0; i < brd->info->nports; i++) { 2647 tty_dev = tty_port_register_device(&brd->ports[i].port, 2648 mxvar_sdriver, brd->idx + i, &pdev->dev); 2649 if (IS_ERR(tty_dev)) { 2650 retval = PTR_ERR(tty_dev); 2651 for (; i > 0; i--) 2652 tty_unregister_device(mxvar_sdriver, 2653 brd->idx + i - 1); 2654 goto err_relbrd; 2655 } 2656 } 2657 2658 pci_set_drvdata(pdev, brd); 2659 2660 return 0; 2661 err_relbrd: 2662 for (i = 0; i < brd->info->nports; i++) 2663 tty_port_destroy(&brd->ports[i].port); 2664 free_irq(brd->irq, brd); 2665 err_rel3: 2666 pci_release_region(pdev, 3); 2667 err_zero: 2668 brd->info = NULL; 2669 pci_release_region(pdev, 2); 2670 err_dis: 2671 pci_disable_device(pdev); 2672 err: 2673 return retval; 2674 #else 2675 return -ENODEV; 2676 #endif 2677 } 2678 2679 static void mxser_remove(struct pci_dev *pdev) 2680 { 2681 #ifdef CONFIG_PCI 2682 struct mxser_board *brd = pci_get_drvdata(pdev); 2683 2684 mxser_board_remove(brd); 2685 2686 pci_release_region(pdev, 2); 2687 pci_release_region(pdev, 3); 2688 pci_disable_device(pdev); 2689 brd->info = NULL; 2690 #endif 2691 } 2692 2693 static struct pci_driver mxser_driver = { 2694 .name = "mxser", 2695 .id_table = mxser_pcibrds, 2696 .probe = mxser_probe, 2697 .remove = mxser_remove 2698 }; 2699 2700 static int __init mxser_module_init(void) 2701 { 2702 struct mxser_board *brd; 2703 struct device *tty_dev; 2704 unsigned int b, i, m; 2705 int retval; 2706 2707 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1); 2708 if (!mxvar_sdriver) 2709 return -ENOMEM; 2710 2711 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n", 2712 MXSER_VERSION); 2713 2714 /* Initialize the tty_driver structure */ 2715 mxvar_sdriver->name = "ttyMI"; 2716 mxvar_sdriver->major = ttymajor; 2717 mxvar_sdriver->minor_start = 0; 2718 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL; 2719 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL; 2720 mxvar_sdriver->init_termios = tty_std_termios; 2721 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL; 2722 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV; 2723 tty_set_operations(mxvar_sdriver, &mxser_ops); 2724 2725 retval = tty_register_driver(mxvar_sdriver); 2726 if (retval) { 2727 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family " 2728 "tty driver !\n"); 2729 goto err_put; 2730 } 2731 2732 /* Start finding ISA boards here */ 2733 for (m = 0, b = 0; b < MXSER_BOARDS; b++) { 2734 if (!ioaddr[b]) 2735 continue; 2736 2737 brd = &mxser_boards[m]; 2738 retval = mxser_get_ISA_conf(ioaddr[b], brd); 2739 if (retval <= 0) { 2740 brd->info = NULL; 2741 continue; 2742 } 2743 2744 printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n", 2745 brd->info->name, ioaddr[b]); 2746 2747 /* mxser_initbrd will hook ISR. */ 2748 if (mxser_initbrd(brd) < 0) { 2749 mxser_release_ISA_res(brd); 2750 brd->info = NULL; 2751 continue; 2752 } 2753 2754 brd->idx = m * MXSER_PORTS_PER_BOARD; 2755 for (i = 0; i < brd->info->nports; i++) { 2756 tty_dev = tty_port_register_device(&brd->ports[i].port, 2757 mxvar_sdriver, brd->idx + i, NULL); 2758 if (IS_ERR(tty_dev)) { 2759 for (; i > 0; i--) 2760 tty_unregister_device(mxvar_sdriver, 2761 brd->idx + i - 1); 2762 for (i = 0; i < brd->info->nports; i++) 2763 tty_port_destroy(&brd->ports[i].port); 2764 free_irq(brd->irq, brd); 2765 mxser_release_ISA_res(brd); 2766 brd->info = NULL; 2767 break; 2768 } 2769 } 2770 if (brd->info == NULL) 2771 continue; 2772 2773 m++; 2774 } 2775 2776 retval = pci_register_driver(&mxser_driver); 2777 if (retval) { 2778 printk(KERN_ERR "mxser: can't register pci driver\n"); 2779 if (!m) { 2780 retval = -ENODEV; 2781 goto err_unr; 2782 } /* else: we have some ISA cards under control */ 2783 } 2784 2785 return 0; 2786 err_unr: 2787 tty_unregister_driver(mxvar_sdriver); 2788 err_put: 2789 put_tty_driver(mxvar_sdriver); 2790 return retval; 2791 } 2792 2793 static void __exit mxser_module_exit(void) 2794 { 2795 unsigned int i; 2796 2797 pci_unregister_driver(&mxser_driver); 2798 2799 for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */ 2800 if (mxser_boards[i].info != NULL) 2801 mxser_board_remove(&mxser_boards[i]); 2802 tty_unregister_driver(mxvar_sdriver); 2803 put_tty_driver(mxvar_sdriver); 2804 2805 for (i = 0; i < MXSER_BOARDS; i++) 2806 if (mxser_boards[i].info != NULL) 2807 mxser_release_ISA_res(&mxser_boards[i]); 2808 } 2809 2810 module_init(mxser_module_init); 2811 module_exit(mxser_module_exit); 2812