1 /* 2 * Derived from many drivers using generic_serial interface, 3 * especially serial_tx3912.c by Steven J. Hill and r39xx_serial.c 4 * (was in Linux/VR tree) by Jim Pick. 5 * 6 * Copyright (C) 1999 Harald Koerfgen 7 * Copyright (C) 2000 Jim Pick <jim@jimpick.com> 8 * Copyright (C) 2001 Steven J. Hill (sjhill@realitydiluted.com) 9 * Copyright (C) 2000-2002 Toshiba Corporation 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 version 2 as 13 * published by the Free Software Foundation. 14 * 15 * Serial driver for TX3927/TX4927/TX4925/TX4938 internal SIO controller 16 */ 17 18 #if defined(CONFIG_SERIAL_TXX9_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) 19 #define SUPPORT_SYSRQ 20 #endif 21 22 #include <linux/module.h> 23 #include <linux/ioport.h> 24 #include <linux/init.h> 25 #include <linux/console.h> 26 #include <linux/delay.h> 27 #include <linux/platform_device.h> 28 #include <linux/pci.h> 29 #include <linux/serial_core.h> 30 #include <linux/serial.h> 31 #include <linux/tty.h> 32 #include <linux/tty_flip.h> 33 34 #include <asm/io.h> 35 36 static char *serial_version = "1.11"; 37 static char *serial_name = "TX39/49 Serial driver"; 38 39 #define PASS_LIMIT 256 40 41 #if !defined(CONFIG_SERIAL_TXX9_STDSERIAL) 42 /* "ttyS" is used for standard serial driver */ 43 #define TXX9_TTY_NAME "ttyTX" 44 #define TXX9_TTY_MINOR_START 196 45 #define TXX9_TTY_MAJOR 204 46 #else 47 /* acts like standard serial driver */ 48 #define TXX9_TTY_NAME "ttyS" 49 #define TXX9_TTY_MINOR_START 64 50 #define TXX9_TTY_MAJOR TTY_MAJOR 51 #endif 52 53 /* flag aliases */ 54 #define UPF_TXX9_HAVE_CTS_LINE UPF_BUGGY_UART 55 #define UPF_TXX9_USE_SCLK UPF_MAGIC_MULTIPLIER 56 57 #ifdef CONFIG_PCI 58 /* support for Toshiba TC86C001 SIO */ 59 #define ENABLE_SERIAL_TXX9_PCI 60 #endif 61 62 /* 63 * Number of serial ports 64 */ 65 #define UART_NR CONFIG_SERIAL_TXX9_NR_UARTS 66 67 struct uart_txx9_port { 68 struct uart_port port; 69 /* No additional info for now */ 70 }; 71 72 #define TXX9_REGION_SIZE 0x24 73 74 /* TXX9 Serial Registers */ 75 #define TXX9_SILCR 0x00 76 #define TXX9_SIDICR 0x04 77 #define TXX9_SIDISR 0x08 78 #define TXX9_SICISR 0x0c 79 #define TXX9_SIFCR 0x10 80 #define TXX9_SIFLCR 0x14 81 #define TXX9_SIBGR 0x18 82 #define TXX9_SITFIFO 0x1c 83 #define TXX9_SIRFIFO 0x20 84 85 /* SILCR : Line Control */ 86 #define TXX9_SILCR_SCS_MASK 0x00000060 87 #define TXX9_SILCR_SCS_IMCLK 0x00000000 88 #define TXX9_SILCR_SCS_IMCLK_BG 0x00000020 89 #define TXX9_SILCR_SCS_SCLK 0x00000040 90 #define TXX9_SILCR_SCS_SCLK_BG 0x00000060 91 #define TXX9_SILCR_UEPS 0x00000010 92 #define TXX9_SILCR_UPEN 0x00000008 93 #define TXX9_SILCR_USBL_MASK 0x00000004 94 #define TXX9_SILCR_USBL_1BIT 0x00000000 95 #define TXX9_SILCR_USBL_2BIT 0x00000004 96 #define TXX9_SILCR_UMODE_MASK 0x00000003 97 #define TXX9_SILCR_UMODE_8BIT 0x00000000 98 #define TXX9_SILCR_UMODE_7BIT 0x00000001 99 100 /* SIDICR : DMA/Int. Control */ 101 #define TXX9_SIDICR_TDE 0x00008000 102 #define TXX9_SIDICR_RDE 0x00004000 103 #define TXX9_SIDICR_TIE 0x00002000 104 #define TXX9_SIDICR_RIE 0x00001000 105 #define TXX9_SIDICR_SPIE 0x00000800 106 #define TXX9_SIDICR_CTSAC 0x00000600 107 #define TXX9_SIDICR_STIE_MASK 0x0000003f 108 #define TXX9_SIDICR_STIE_OERS 0x00000020 109 #define TXX9_SIDICR_STIE_CTSS 0x00000010 110 #define TXX9_SIDICR_STIE_RBRKD 0x00000008 111 #define TXX9_SIDICR_STIE_TRDY 0x00000004 112 #define TXX9_SIDICR_STIE_TXALS 0x00000002 113 #define TXX9_SIDICR_STIE_UBRKD 0x00000001 114 115 /* SIDISR : DMA/Int. Status */ 116 #define TXX9_SIDISR_UBRK 0x00008000 117 #define TXX9_SIDISR_UVALID 0x00004000 118 #define TXX9_SIDISR_UFER 0x00002000 119 #define TXX9_SIDISR_UPER 0x00001000 120 #define TXX9_SIDISR_UOER 0x00000800 121 #define TXX9_SIDISR_ERI 0x00000400 122 #define TXX9_SIDISR_TOUT 0x00000200 123 #define TXX9_SIDISR_TDIS 0x00000100 124 #define TXX9_SIDISR_RDIS 0x00000080 125 #define TXX9_SIDISR_STIS 0x00000040 126 #define TXX9_SIDISR_RFDN_MASK 0x0000001f 127 128 /* SICISR : Change Int. Status */ 129 #define TXX9_SICISR_OERS 0x00000020 130 #define TXX9_SICISR_CTSS 0x00000010 131 #define TXX9_SICISR_RBRKD 0x00000008 132 #define TXX9_SICISR_TRDY 0x00000004 133 #define TXX9_SICISR_TXALS 0x00000002 134 #define TXX9_SICISR_UBRKD 0x00000001 135 136 /* SIFCR : FIFO Control */ 137 #define TXX9_SIFCR_SWRST 0x00008000 138 #define TXX9_SIFCR_RDIL_MASK 0x00000180 139 #define TXX9_SIFCR_RDIL_1 0x00000000 140 #define TXX9_SIFCR_RDIL_4 0x00000080 141 #define TXX9_SIFCR_RDIL_8 0x00000100 142 #define TXX9_SIFCR_RDIL_12 0x00000180 143 #define TXX9_SIFCR_RDIL_MAX 0x00000180 144 #define TXX9_SIFCR_TDIL_MASK 0x00000018 145 #define TXX9_SIFCR_TDIL_1 0x00000000 146 #define TXX9_SIFCR_TDIL_4 0x00000001 147 #define TXX9_SIFCR_TDIL_8 0x00000010 148 #define TXX9_SIFCR_TDIL_MAX 0x00000010 149 #define TXX9_SIFCR_TFRST 0x00000004 150 #define TXX9_SIFCR_RFRST 0x00000002 151 #define TXX9_SIFCR_FRSTE 0x00000001 152 #define TXX9_SIO_TX_FIFO 8 153 #define TXX9_SIO_RX_FIFO 16 154 155 /* SIFLCR : Flow Control */ 156 #define TXX9_SIFLCR_RCS 0x00001000 157 #define TXX9_SIFLCR_TES 0x00000800 158 #define TXX9_SIFLCR_RTSSC 0x00000200 159 #define TXX9_SIFLCR_RSDE 0x00000100 160 #define TXX9_SIFLCR_TSDE 0x00000080 161 #define TXX9_SIFLCR_RTSTL_MASK 0x0000001e 162 #define TXX9_SIFLCR_RTSTL_MAX 0x0000001e 163 #define TXX9_SIFLCR_TBRK 0x00000001 164 165 /* SIBGR : Baudrate Control */ 166 #define TXX9_SIBGR_BCLK_MASK 0x00000300 167 #define TXX9_SIBGR_BCLK_T0 0x00000000 168 #define TXX9_SIBGR_BCLK_T2 0x00000100 169 #define TXX9_SIBGR_BCLK_T4 0x00000200 170 #define TXX9_SIBGR_BCLK_T6 0x00000300 171 #define TXX9_SIBGR_BRD_MASK 0x000000ff 172 173 static inline unsigned int sio_in(struct uart_txx9_port *up, int offset) 174 { 175 switch (up->port.iotype) { 176 default: 177 return __raw_readl(up->port.membase + offset); 178 case UPIO_PORT: 179 return inl(up->port.iobase + offset); 180 } 181 } 182 183 static inline void 184 sio_out(struct uart_txx9_port *up, int offset, int value) 185 { 186 switch (up->port.iotype) { 187 default: 188 __raw_writel(value, up->port.membase + offset); 189 break; 190 case UPIO_PORT: 191 outl(value, up->port.iobase + offset); 192 break; 193 } 194 } 195 196 static inline void 197 sio_mask(struct uart_txx9_port *up, int offset, unsigned int value) 198 { 199 sio_out(up, offset, sio_in(up, offset) & ~value); 200 } 201 static inline void 202 sio_set(struct uart_txx9_port *up, int offset, unsigned int value) 203 { 204 sio_out(up, offset, sio_in(up, offset) | value); 205 } 206 207 static inline void 208 sio_quot_set(struct uart_txx9_port *up, int quot) 209 { 210 quot >>= 1; 211 if (quot < 256) 212 sio_out(up, TXX9_SIBGR, quot | TXX9_SIBGR_BCLK_T0); 213 else if (quot < (256 << 2)) 214 sio_out(up, TXX9_SIBGR, (quot >> 2) | TXX9_SIBGR_BCLK_T2); 215 else if (quot < (256 << 4)) 216 sio_out(up, TXX9_SIBGR, (quot >> 4) | TXX9_SIBGR_BCLK_T4); 217 else if (quot < (256 << 6)) 218 sio_out(up, TXX9_SIBGR, (quot >> 6) | TXX9_SIBGR_BCLK_T6); 219 else 220 sio_out(up, TXX9_SIBGR, 0xff | TXX9_SIBGR_BCLK_T6); 221 } 222 223 static struct uart_txx9_port *to_uart_txx9_port(struct uart_port *port) 224 { 225 return container_of(port, struct uart_txx9_port, port); 226 } 227 228 static void serial_txx9_stop_tx(struct uart_port *port) 229 { 230 struct uart_txx9_port *up = to_uart_txx9_port(port); 231 sio_mask(up, TXX9_SIDICR, TXX9_SIDICR_TIE); 232 } 233 234 static void serial_txx9_start_tx(struct uart_port *port) 235 { 236 struct uart_txx9_port *up = to_uart_txx9_port(port); 237 sio_set(up, TXX9_SIDICR, TXX9_SIDICR_TIE); 238 } 239 240 static void serial_txx9_stop_rx(struct uart_port *port) 241 { 242 struct uart_txx9_port *up = to_uart_txx9_port(port); 243 up->port.read_status_mask &= ~TXX9_SIDISR_RDIS; 244 } 245 246 static void serial_txx9_initialize(struct uart_port *port) 247 { 248 struct uart_txx9_port *up = to_uart_txx9_port(port); 249 unsigned int tmout = 10000; 250 251 sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST); 252 /* TX4925 BUG WORKAROUND. Accessing SIOC register 253 * immediately after soft reset causes bus error. */ 254 mmiowb(); 255 udelay(1); 256 while ((sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) && --tmout) 257 udelay(1); 258 /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */ 259 sio_set(up, TXX9_SIFCR, 260 TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1); 261 /* initial settings */ 262 sio_out(up, TXX9_SILCR, 263 TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT | 264 ((up->port.flags & UPF_TXX9_USE_SCLK) ? 265 TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG)); 266 sio_quot_set(up, uart_get_divisor(port, 9600)); 267 sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */); 268 sio_out(up, TXX9_SIDICR, 0); 269 } 270 271 static inline void 272 receive_chars(struct uart_txx9_port *up, unsigned int *status) 273 { 274 unsigned char ch; 275 unsigned int disr = *status; 276 int max_count = 256; 277 char flag; 278 unsigned int next_ignore_status_mask; 279 280 do { 281 ch = sio_in(up, TXX9_SIRFIFO); 282 flag = TTY_NORMAL; 283 up->port.icount.rx++; 284 285 /* mask out RFDN_MASK bit added by previous overrun */ 286 next_ignore_status_mask = 287 up->port.ignore_status_mask & ~TXX9_SIDISR_RFDN_MASK; 288 if (unlikely(disr & (TXX9_SIDISR_UBRK | TXX9_SIDISR_UPER | 289 TXX9_SIDISR_UFER | TXX9_SIDISR_UOER))) { 290 /* 291 * For statistics only 292 */ 293 if (disr & TXX9_SIDISR_UBRK) { 294 disr &= ~(TXX9_SIDISR_UFER | TXX9_SIDISR_UPER); 295 up->port.icount.brk++; 296 /* 297 * We do the SysRQ and SAK checking 298 * here because otherwise the break 299 * may get masked by ignore_status_mask 300 * or read_status_mask. 301 */ 302 if (uart_handle_break(&up->port)) 303 goto ignore_char; 304 } else if (disr & TXX9_SIDISR_UPER) 305 up->port.icount.parity++; 306 else if (disr & TXX9_SIDISR_UFER) 307 up->port.icount.frame++; 308 if (disr & TXX9_SIDISR_UOER) { 309 up->port.icount.overrun++; 310 /* 311 * The receiver read buffer still hold 312 * a char which caused overrun. 313 * Ignore next char by adding RFDN_MASK 314 * to ignore_status_mask temporarily. 315 */ 316 next_ignore_status_mask |= 317 TXX9_SIDISR_RFDN_MASK; 318 } 319 320 /* 321 * Mask off conditions which should be ingored. 322 */ 323 disr &= up->port.read_status_mask; 324 325 if (disr & TXX9_SIDISR_UBRK) { 326 flag = TTY_BREAK; 327 } else if (disr & TXX9_SIDISR_UPER) 328 flag = TTY_PARITY; 329 else if (disr & TXX9_SIDISR_UFER) 330 flag = TTY_FRAME; 331 } 332 if (uart_handle_sysrq_char(&up->port, ch)) 333 goto ignore_char; 334 335 uart_insert_char(&up->port, disr, TXX9_SIDISR_UOER, ch, flag); 336 337 ignore_char: 338 up->port.ignore_status_mask = next_ignore_status_mask; 339 disr = sio_in(up, TXX9_SIDISR); 340 } while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0)); 341 spin_unlock(&up->port.lock); 342 tty_flip_buffer_push(&up->port.state->port); 343 spin_lock(&up->port.lock); 344 *status = disr; 345 } 346 347 static inline void transmit_chars(struct uart_txx9_port *up) 348 { 349 struct circ_buf *xmit = &up->port.state->xmit; 350 int count; 351 352 if (up->port.x_char) { 353 sio_out(up, TXX9_SITFIFO, up->port.x_char); 354 up->port.icount.tx++; 355 up->port.x_char = 0; 356 return; 357 } 358 if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) { 359 serial_txx9_stop_tx(&up->port); 360 return; 361 } 362 363 count = TXX9_SIO_TX_FIFO; 364 do { 365 sio_out(up, TXX9_SITFIFO, xmit->buf[xmit->tail]); 366 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); 367 up->port.icount.tx++; 368 if (uart_circ_empty(xmit)) 369 break; 370 } while (--count > 0); 371 372 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) 373 uart_write_wakeup(&up->port); 374 375 if (uart_circ_empty(xmit)) 376 serial_txx9_stop_tx(&up->port); 377 } 378 379 static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id) 380 { 381 int pass_counter = 0; 382 struct uart_txx9_port *up = dev_id; 383 unsigned int status; 384 385 while (1) { 386 spin_lock(&up->port.lock); 387 status = sio_in(up, TXX9_SIDISR); 388 if (!(sio_in(up, TXX9_SIDICR) & TXX9_SIDICR_TIE)) 389 status &= ~TXX9_SIDISR_TDIS; 390 if (!(status & (TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS | 391 TXX9_SIDISR_TOUT))) { 392 spin_unlock(&up->port.lock); 393 break; 394 } 395 396 if (status & TXX9_SIDISR_RDIS) 397 receive_chars(up, &status); 398 if (status & TXX9_SIDISR_TDIS) 399 transmit_chars(up); 400 /* Clear TX/RX Int. Status */ 401 sio_mask(up, TXX9_SIDISR, 402 TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS | 403 TXX9_SIDISR_TOUT); 404 spin_unlock(&up->port.lock); 405 406 if (pass_counter++ > PASS_LIMIT) 407 break; 408 } 409 410 return pass_counter ? IRQ_HANDLED : IRQ_NONE; 411 } 412 413 static unsigned int serial_txx9_tx_empty(struct uart_port *port) 414 { 415 struct uart_txx9_port *up = to_uart_txx9_port(port); 416 unsigned long flags; 417 unsigned int ret; 418 419 spin_lock_irqsave(&up->port.lock, flags); 420 ret = (sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS) ? TIOCSER_TEMT : 0; 421 spin_unlock_irqrestore(&up->port.lock, flags); 422 423 return ret; 424 } 425 426 static unsigned int serial_txx9_get_mctrl(struct uart_port *port) 427 { 428 struct uart_txx9_port *up = to_uart_txx9_port(port); 429 unsigned int ret; 430 431 /* no modem control lines */ 432 ret = TIOCM_CAR | TIOCM_DSR; 433 ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS; 434 ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS; 435 436 return ret; 437 } 438 439 static void serial_txx9_set_mctrl(struct uart_port *port, unsigned int mctrl) 440 { 441 struct uart_txx9_port *up = to_uart_txx9_port(port); 442 443 if (mctrl & TIOCM_RTS) 444 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC); 445 else 446 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC); 447 } 448 449 static void serial_txx9_break_ctl(struct uart_port *port, int break_state) 450 { 451 struct uart_txx9_port *up = to_uart_txx9_port(port); 452 unsigned long flags; 453 454 spin_lock_irqsave(&up->port.lock, flags); 455 if (break_state == -1) 456 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK); 457 else 458 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK); 459 spin_unlock_irqrestore(&up->port.lock, flags); 460 } 461 462 #if defined(CONFIG_SERIAL_TXX9_CONSOLE) || defined(CONFIG_CONSOLE_POLL) 463 /* 464 * Wait for transmitter & holding register to empty 465 */ 466 static void wait_for_xmitr(struct uart_txx9_port *up) 467 { 468 unsigned int tmout = 10000; 469 470 /* Wait up to 10ms for the character(s) to be sent. */ 471 while (--tmout && 472 !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS)) 473 udelay(1); 474 475 /* Wait up to 1s for flow control if necessary */ 476 if (up->port.flags & UPF_CONS_FLOW) { 477 tmout = 1000000; 478 while (--tmout && 479 (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS)) 480 udelay(1); 481 } 482 } 483 #endif 484 485 #ifdef CONFIG_CONSOLE_POLL 486 /* 487 * Console polling routines for writing and reading from the uart while 488 * in an interrupt or debug context. 489 */ 490 491 static int serial_txx9_get_poll_char(struct uart_port *port) 492 { 493 unsigned int ier; 494 unsigned char c; 495 struct uart_txx9_port *up = to_uart_txx9_port(port); 496 497 /* 498 * First save the IER then disable the interrupts 499 */ 500 ier = sio_in(up, TXX9_SIDICR); 501 sio_out(up, TXX9_SIDICR, 0); 502 503 while (sio_in(up, TXX9_SIDISR) & TXX9_SIDISR_UVALID) 504 ; 505 506 c = sio_in(up, TXX9_SIRFIFO); 507 508 /* 509 * Finally, clear RX interrupt status 510 * and restore the IER 511 */ 512 sio_mask(up, TXX9_SIDISR, TXX9_SIDISR_RDIS); 513 sio_out(up, TXX9_SIDICR, ier); 514 return c; 515 } 516 517 518 static void serial_txx9_put_poll_char(struct uart_port *port, unsigned char c) 519 { 520 unsigned int ier; 521 struct uart_txx9_port *up = to_uart_txx9_port(port); 522 523 /* 524 * First save the IER then disable the interrupts 525 */ 526 ier = sio_in(up, TXX9_SIDICR); 527 sio_out(up, TXX9_SIDICR, 0); 528 529 wait_for_xmitr(up); 530 /* 531 * Send the character out. 532 */ 533 sio_out(up, TXX9_SITFIFO, c); 534 535 /* 536 * Finally, wait for transmitter to become empty 537 * and restore the IER 538 */ 539 wait_for_xmitr(up); 540 sio_out(up, TXX9_SIDICR, ier); 541 } 542 543 #endif /* CONFIG_CONSOLE_POLL */ 544 545 static int serial_txx9_startup(struct uart_port *port) 546 { 547 struct uart_txx9_port *up = to_uart_txx9_port(port); 548 unsigned long flags; 549 int retval; 550 551 /* 552 * Clear the FIFO buffers and disable them. 553 * (they will be reenabled in set_termios()) 554 */ 555 sio_set(up, TXX9_SIFCR, 556 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); 557 /* clear reset */ 558 sio_mask(up, TXX9_SIFCR, 559 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); 560 sio_out(up, TXX9_SIDICR, 0); 561 562 /* 563 * Clear the interrupt registers. 564 */ 565 sio_out(up, TXX9_SIDISR, 0); 566 567 retval = request_irq(up->port.irq, serial_txx9_interrupt, 568 IRQF_SHARED, "serial_txx9", up); 569 if (retval) 570 return retval; 571 572 /* 573 * Now, initialize the UART 574 */ 575 spin_lock_irqsave(&up->port.lock, flags); 576 serial_txx9_set_mctrl(&up->port, up->port.mctrl); 577 spin_unlock_irqrestore(&up->port.lock, flags); 578 579 /* Enable RX/TX */ 580 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE); 581 582 /* 583 * Finally, enable interrupts. 584 */ 585 sio_set(up, TXX9_SIDICR, TXX9_SIDICR_RIE); 586 587 return 0; 588 } 589 590 static void serial_txx9_shutdown(struct uart_port *port) 591 { 592 struct uart_txx9_port *up = to_uart_txx9_port(port); 593 unsigned long flags; 594 595 /* 596 * Disable interrupts from this port 597 */ 598 sio_out(up, TXX9_SIDICR, 0); /* disable all intrs */ 599 600 spin_lock_irqsave(&up->port.lock, flags); 601 serial_txx9_set_mctrl(&up->port, up->port.mctrl); 602 spin_unlock_irqrestore(&up->port.lock, flags); 603 604 /* 605 * Disable break condition 606 */ 607 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK); 608 609 #ifdef CONFIG_SERIAL_TXX9_CONSOLE 610 if (up->port.cons && up->port.line == up->port.cons->index) { 611 free_irq(up->port.irq, up); 612 return; 613 } 614 #endif 615 /* reset FIFOs */ 616 sio_set(up, TXX9_SIFCR, 617 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); 618 /* clear reset */ 619 sio_mask(up, TXX9_SIFCR, 620 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); 621 622 /* Disable RX/TX */ 623 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE); 624 625 free_irq(up->port.irq, up); 626 } 627 628 static void 629 serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios, 630 struct ktermios *old) 631 { 632 struct uart_txx9_port *up = to_uart_txx9_port(port); 633 unsigned int cval, fcr = 0; 634 unsigned long flags; 635 unsigned int baud, quot; 636 637 /* 638 * We don't support modem control lines. 639 */ 640 termios->c_cflag &= ~(HUPCL | CMSPAR); 641 termios->c_cflag |= CLOCAL; 642 643 cval = sio_in(up, TXX9_SILCR); 644 /* byte size and parity */ 645 cval &= ~TXX9_SILCR_UMODE_MASK; 646 switch (termios->c_cflag & CSIZE) { 647 case CS7: 648 cval |= TXX9_SILCR_UMODE_7BIT; 649 break; 650 default: 651 case CS5: /* not supported */ 652 case CS6: /* not supported */ 653 case CS8: 654 cval |= TXX9_SILCR_UMODE_8BIT; 655 break; 656 } 657 658 cval &= ~TXX9_SILCR_USBL_MASK; 659 if (termios->c_cflag & CSTOPB) 660 cval |= TXX9_SILCR_USBL_2BIT; 661 else 662 cval |= TXX9_SILCR_USBL_1BIT; 663 cval &= ~(TXX9_SILCR_UPEN | TXX9_SILCR_UEPS); 664 if (termios->c_cflag & PARENB) 665 cval |= TXX9_SILCR_UPEN; 666 if (!(termios->c_cflag & PARODD)) 667 cval |= TXX9_SILCR_UEPS; 668 669 /* 670 * Ask the core to calculate the divisor for us. 671 */ 672 baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16/2); 673 quot = uart_get_divisor(port, baud); 674 675 /* Set up FIFOs */ 676 /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */ 677 fcr = TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1; 678 679 /* 680 * Ok, we're now changing the port state. Do it with 681 * interrupts disabled. 682 */ 683 spin_lock_irqsave(&up->port.lock, flags); 684 685 /* 686 * Update the per-port timeout. 687 */ 688 uart_update_timeout(port, termios->c_cflag, baud); 689 690 up->port.read_status_mask = TXX9_SIDISR_UOER | 691 TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS; 692 if (termios->c_iflag & INPCK) 693 up->port.read_status_mask |= TXX9_SIDISR_UFER | TXX9_SIDISR_UPER; 694 if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK)) 695 up->port.read_status_mask |= TXX9_SIDISR_UBRK; 696 697 /* 698 * Characteres to ignore 699 */ 700 up->port.ignore_status_mask = 0; 701 if (termios->c_iflag & IGNPAR) 702 up->port.ignore_status_mask |= TXX9_SIDISR_UPER | TXX9_SIDISR_UFER; 703 if (termios->c_iflag & IGNBRK) { 704 up->port.ignore_status_mask |= TXX9_SIDISR_UBRK; 705 /* 706 * If we're ignoring parity and break indicators, 707 * ignore overruns too (for real raw support). 708 */ 709 if (termios->c_iflag & IGNPAR) 710 up->port.ignore_status_mask |= TXX9_SIDISR_UOER; 711 } 712 713 /* 714 * ignore all characters if CREAD is not set 715 */ 716 if ((termios->c_cflag & CREAD) == 0) 717 up->port.ignore_status_mask |= TXX9_SIDISR_RDIS; 718 719 /* CTS flow control flag */ 720 if ((termios->c_cflag & CRTSCTS) && 721 (up->port.flags & UPF_TXX9_HAVE_CTS_LINE)) { 722 sio_set(up, TXX9_SIFLCR, 723 TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES); 724 } else { 725 sio_mask(up, TXX9_SIFLCR, 726 TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES); 727 } 728 729 sio_out(up, TXX9_SILCR, cval); 730 sio_quot_set(up, quot); 731 sio_out(up, TXX9_SIFCR, fcr); 732 733 serial_txx9_set_mctrl(&up->port, up->port.mctrl); 734 spin_unlock_irqrestore(&up->port.lock, flags); 735 } 736 737 static void 738 serial_txx9_pm(struct uart_port *port, unsigned int state, 739 unsigned int oldstate) 740 { 741 /* 742 * If oldstate was -1 this is called from 743 * uart_configure_port(). In this case do not initialize the 744 * port now, because the port was already initialized (for 745 * non-console port) or should not be initialized here (for 746 * console port). If we initialized the port here we lose 747 * serial console settings. 748 */ 749 if (state == 0 && oldstate != -1) 750 serial_txx9_initialize(port); 751 } 752 753 static int serial_txx9_request_resource(struct uart_txx9_port *up) 754 { 755 unsigned int size = TXX9_REGION_SIZE; 756 int ret = 0; 757 758 switch (up->port.iotype) { 759 default: 760 if (!up->port.mapbase) 761 break; 762 763 if (!request_mem_region(up->port.mapbase, size, "serial_txx9")) { 764 ret = -EBUSY; 765 break; 766 } 767 768 if (up->port.flags & UPF_IOREMAP) { 769 up->port.membase = ioremap(up->port.mapbase, size); 770 if (!up->port.membase) { 771 release_mem_region(up->port.mapbase, size); 772 ret = -ENOMEM; 773 } 774 } 775 break; 776 777 case UPIO_PORT: 778 if (!request_region(up->port.iobase, size, "serial_txx9")) 779 ret = -EBUSY; 780 break; 781 } 782 return ret; 783 } 784 785 static void serial_txx9_release_resource(struct uart_txx9_port *up) 786 { 787 unsigned int size = TXX9_REGION_SIZE; 788 789 switch (up->port.iotype) { 790 default: 791 if (!up->port.mapbase) 792 break; 793 794 if (up->port.flags & UPF_IOREMAP) { 795 iounmap(up->port.membase); 796 up->port.membase = NULL; 797 } 798 799 release_mem_region(up->port.mapbase, size); 800 break; 801 802 case UPIO_PORT: 803 release_region(up->port.iobase, size); 804 break; 805 } 806 } 807 808 static void serial_txx9_release_port(struct uart_port *port) 809 { 810 struct uart_txx9_port *up = to_uart_txx9_port(port); 811 serial_txx9_release_resource(up); 812 } 813 814 static int serial_txx9_request_port(struct uart_port *port) 815 { 816 struct uart_txx9_port *up = to_uart_txx9_port(port); 817 return serial_txx9_request_resource(up); 818 } 819 820 static void serial_txx9_config_port(struct uart_port *port, int uflags) 821 { 822 struct uart_txx9_port *up = to_uart_txx9_port(port); 823 int ret; 824 825 /* 826 * Find the region that we can probe for. This in turn 827 * tells us whether we can probe for the type of port. 828 */ 829 ret = serial_txx9_request_resource(up); 830 if (ret < 0) 831 return; 832 port->type = PORT_TXX9; 833 up->port.fifosize = TXX9_SIO_TX_FIFO; 834 835 #ifdef CONFIG_SERIAL_TXX9_CONSOLE 836 if (up->port.line == up->port.cons->index) 837 return; 838 #endif 839 serial_txx9_initialize(port); 840 } 841 842 static const char * 843 serial_txx9_type(struct uart_port *port) 844 { 845 return "txx9"; 846 } 847 848 static struct uart_ops serial_txx9_pops = { 849 .tx_empty = serial_txx9_tx_empty, 850 .set_mctrl = serial_txx9_set_mctrl, 851 .get_mctrl = serial_txx9_get_mctrl, 852 .stop_tx = serial_txx9_stop_tx, 853 .start_tx = serial_txx9_start_tx, 854 .stop_rx = serial_txx9_stop_rx, 855 .break_ctl = serial_txx9_break_ctl, 856 .startup = serial_txx9_startup, 857 .shutdown = serial_txx9_shutdown, 858 .set_termios = serial_txx9_set_termios, 859 .pm = serial_txx9_pm, 860 .type = serial_txx9_type, 861 .release_port = serial_txx9_release_port, 862 .request_port = serial_txx9_request_port, 863 .config_port = serial_txx9_config_port, 864 #ifdef CONFIG_CONSOLE_POLL 865 .poll_get_char = serial_txx9_get_poll_char, 866 .poll_put_char = serial_txx9_put_poll_char, 867 #endif 868 }; 869 870 static struct uart_txx9_port serial_txx9_ports[UART_NR]; 871 872 static void __init serial_txx9_register_ports(struct uart_driver *drv, 873 struct device *dev) 874 { 875 int i; 876 877 for (i = 0; i < UART_NR; i++) { 878 struct uart_txx9_port *up = &serial_txx9_ports[i]; 879 880 up->port.line = i; 881 up->port.ops = &serial_txx9_pops; 882 up->port.dev = dev; 883 if (up->port.iobase || up->port.mapbase) 884 uart_add_one_port(drv, &up->port); 885 } 886 } 887 888 #ifdef CONFIG_SERIAL_TXX9_CONSOLE 889 890 static void serial_txx9_console_putchar(struct uart_port *port, int ch) 891 { 892 struct uart_txx9_port *up = to_uart_txx9_port(port); 893 894 wait_for_xmitr(up); 895 sio_out(up, TXX9_SITFIFO, ch); 896 } 897 898 /* 899 * Print a string to the serial port trying not to disturb 900 * any possible real use of the port... 901 * 902 * The console_lock must be held when we get here. 903 */ 904 static void 905 serial_txx9_console_write(struct console *co, const char *s, unsigned int count) 906 { 907 struct uart_txx9_port *up = &serial_txx9_ports[co->index]; 908 unsigned int ier, flcr; 909 910 /* 911 * First save the UER then disable the interrupts 912 */ 913 ier = sio_in(up, TXX9_SIDICR); 914 sio_out(up, TXX9_SIDICR, 0); 915 /* 916 * Disable flow-control if enabled (and unnecessary) 917 */ 918 flcr = sio_in(up, TXX9_SIFLCR); 919 if (!(up->port.flags & UPF_CONS_FLOW) && (flcr & TXX9_SIFLCR_TES)) 920 sio_out(up, TXX9_SIFLCR, flcr & ~TXX9_SIFLCR_TES); 921 922 uart_console_write(&up->port, s, count, serial_txx9_console_putchar); 923 924 /* 925 * Finally, wait for transmitter to become empty 926 * and restore the IER 927 */ 928 wait_for_xmitr(up); 929 sio_out(up, TXX9_SIFLCR, flcr); 930 sio_out(up, TXX9_SIDICR, ier); 931 } 932 933 static int __init serial_txx9_console_setup(struct console *co, char *options) 934 { 935 struct uart_port *port; 936 struct uart_txx9_port *up; 937 int baud = 9600; 938 int bits = 8; 939 int parity = 'n'; 940 int flow = 'n'; 941 942 /* 943 * Check whether an invalid uart number has been specified, and 944 * if so, search for the first available port that does have 945 * console support. 946 */ 947 if (co->index >= UART_NR) 948 co->index = 0; 949 up = &serial_txx9_ports[co->index]; 950 port = &up->port; 951 if (!port->ops) 952 return -ENODEV; 953 954 serial_txx9_initialize(&up->port); 955 956 if (options) 957 uart_parse_options(options, &baud, &parity, &bits, &flow); 958 959 return uart_set_options(port, co, baud, parity, bits, flow); 960 } 961 962 static struct uart_driver serial_txx9_reg; 963 static struct console serial_txx9_console = { 964 .name = TXX9_TTY_NAME, 965 .write = serial_txx9_console_write, 966 .device = uart_console_device, 967 .setup = serial_txx9_console_setup, 968 .flags = CON_PRINTBUFFER, 969 .index = -1, 970 .data = &serial_txx9_reg, 971 }; 972 973 static int __init serial_txx9_console_init(void) 974 { 975 register_console(&serial_txx9_console); 976 return 0; 977 } 978 console_initcall(serial_txx9_console_init); 979 980 #define SERIAL_TXX9_CONSOLE &serial_txx9_console 981 #else 982 #define SERIAL_TXX9_CONSOLE NULL 983 #endif 984 985 static struct uart_driver serial_txx9_reg = { 986 .owner = THIS_MODULE, 987 .driver_name = "serial_txx9", 988 .dev_name = TXX9_TTY_NAME, 989 .major = TXX9_TTY_MAJOR, 990 .minor = TXX9_TTY_MINOR_START, 991 .nr = UART_NR, 992 .cons = SERIAL_TXX9_CONSOLE, 993 }; 994 995 int __init early_serial_txx9_setup(struct uart_port *port) 996 { 997 if (port->line >= ARRAY_SIZE(serial_txx9_ports)) 998 return -ENODEV; 999 1000 serial_txx9_ports[port->line].port = *port; 1001 serial_txx9_ports[port->line].port.ops = &serial_txx9_pops; 1002 serial_txx9_ports[port->line].port.flags |= 1003 UPF_BOOT_AUTOCONF | UPF_FIXED_PORT; 1004 return 0; 1005 } 1006 1007 static DEFINE_MUTEX(serial_txx9_mutex); 1008 1009 /** 1010 * serial_txx9_register_port - register a serial port 1011 * @port: serial port template 1012 * 1013 * Configure the serial port specified by the request. 1014 * 1015 * The port is then probed and if necessary the IRQ is autodetected 1016 * If this fails an error is returned. 1017 * 1018 * On success the port is ready to use and the line number is returned. 1019 */ 1020 static int serial_txx9_register_port(struct uart_port *port) 1021 { 1022 int i; 1023 struct uart_txx9_port *uart; 1024 int ret = -ENOSPC; 1025 1026 mutex_lock(&serial_txx9_mutex); 1027 for (i = 0; i < UART_NR; i++) { 1028 uart = &serial_txx9_ports[i]; 1029 if (uart_match_port(&uart->port, port)) { 1030 uart_remove_one_port(&serial_txx9_reg, &uart->port); 1031 break; 1032 } 1033 } 1034 if (i == UART_NR) { 1035 /* Find unused port */ 1036 for (i = 0; i < UART_NR; i++) { 1037 uart = &serial_txx9_ports[i]; 1038 if (!(uart->port.iobase || uart->port.mapbase)) 1039 break; 1040 } 1041 } 1042 if (i < UART_NR) { 1043 uart->port.iobase = port->iobase; 1044 uart->port.membase = port->membase; 1045 uart->port.irq = port->irq; 1046 uart->port.uartclk = port->uartclk; 1047 uart->port.iotype = port->iotype; 1048 uart->port.flags = port->flags 1049 | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT; 1050 uart->port.mapbase = port->mapbase; 1051 if (port->dev) 1052 uart->port.dev = port->dev; 1053 ret = uart_add_one_port(&serial_txx9_reg, &uart->port); 1054 if (ret == 0) 1055 ret = uart->port.line; 1056 } 1057 mutex_unlock(&serial_txx9_mutex); 1058 return ret; 1059 } 1060 1061 /** 1062 * serial_txx9_unregister_port - remove a txx9 serial port at runtime 1063 * @line: serial line number 1064 * 1065 * Remove one serial port. This may not be called from interrupt 1066 * context. We hand the port back to the our control. 1067 */ 1068 static void serial_txx9_unregister_port(int line) 1069 { 1070 struct uart_txx9_port *uart = &serial_txx9_ports[line]; 1071 1072 mutex_lock(&serial_txx9_mutex); 1073 uart_remove_one_port(&serial_txx9_reg, &uart->port); 1074 uart->port.flags = 0; 1075 uart->port.type = PORT_UNKNOWN; 1076 uart->port.iobase = 0; 1077 uart->port.mapbase = 0; 1078 uart->port.membase = NULL; 1079 uart->port.dev = NULL; 1080 mutex_unlock(&serial_txx9_mutex); 1081 } 1082 1083 /* 1084 * Register a set of serial devices attached to a platform device. 1085 */ 1086 static int serial_txx9_probe(struct platform_device *dev) 1087 { 1088 struct uart_port *p = dev_get_platdata(&dev->dev); 1089 struct uart_port port; 1090 int ret, i; 1091 1092 memset(&port, 0, sizeof(struct uart_port)); 1093 for (i = 0; p && p->uartclk != 0; p++, i++) { 1094 port.iobase = p->iobase; 1095 port.membase = p->membase; 1096 port.irq = p->irq; 1097 port.uartclk = p->uartclk; 1098 port.iotype = p->iotype; 1099 port.flags = p->flags; 1100 port.mapbase = p->mapbase; 1101 port.dev = &dev->dev; 1102 ret = serial_txx9_register_port(&port); 1103 if (ret < 0) { 1104 dev_err(&dev->dev, "unable to register port at index %d " 1105 "(IO%lx MEM%llx IRQ%d): %d\n", i, 1106 p->iobase, (unsigned long long)p->mapbase, 1107 p->irq, ret); 1108 } 1109 } 1110 return 0; 1111 } 1112 1113 /* 1114 * Remove serial ports registered against a platform device. 1115 */ 1116 static int serial_txx9_remove(struct platform_device *dev) 1117 { 1118 int i; 1119 1120 for (i = 0; i < UART_NR; i++) { 1121 struct uart_txx9_port *up = &serial_txx9_ports[i]; 1122 1123 if (up->port.dev == &dev->dev) 1124 serial_txx9_unregister_port(i); 1125 } 1126 return 0; 1127 } 1128 1129 #ifdef CONFIG_PM 1130 static int serial_txx9_suspend(struct platform_device *dev, pm_message_t state) 1131 { 1132 int i; 1133 1134 for (i = 0; i < UART_NR; i++) { 1135 struct uart_txx9_port *up = &serial_txx9_ports[i]; 1136 1137 if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev) 1138 uart_suspend_port(&serial_txx9_reg, &up->port); 1139 } 1140 1141 return 0; 1142 } 1143 1144 static int serial_txx9_resume(struct platform_device *dev) 1145 { 1146 int i; 1147 1148 for (i = 0; i < UART_NR; i++) { 1149 struct uart_txx9_port *up = &serial_txx9_ports[i]; 1150 1151 if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev) 1152 uart_resume_port(&serial_txx9_reg, &up->port); 1153 } 1154 1155 return 0; 1156 } 1157 #endif 1158 1159 static struct platform_driver serial_txx9_plat_driver = { 1160 .probe = serial_txx9_probe, 1161 .remove = serial_txx9_remove, 1162 #ifdef CONFIG_PM 1163 .suspend = serial_txx9_suspend, 1164 .resume = serial_txx9_resume, 1165 #endif 1166 .driver = { 1167 .name = "serial_txx9", 1168 .owner = THIS_MODULE, 1169 }, 1170 }; 1171 1172 #ifdef ENABLE_SERIAL_TXX9_PCI 1173 /* 1174 * Probe one serial board. Unfortunately, there is no rhyme nor reason 1175 * to the arrangement of serial ports on a PCI card. 1176 */ 1177 static int 1178 pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent) 1179 { 1180 struct uart_port port; 1181 int line; 1182 int rc; 1183 1184 rc = pci_enable_device(dev); 1185 if (rc) 1186 return rc; 1187 1188 memset(&port, 0, sizeof(port)); 1189 port.ops = &serial_txx9_pops; 1190 port.flags |= UPF_TXX9_HAVE_CTS_LINE; 1191 port.uartclk = 66670000; 1192 port.irq = dev->irq; 1193 port.iotype = UPIO_PORT; 1194 port.iobase = pci_resource_start(dev, 1); 1195 port.dev = &dev->dev; 1196 line = serial_txx9_register_port(&port); 1197 if (line < 0) { 1198 printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line); 1199 pci_disable_device(dev); 1200 return line; 1201 } 1202 pci_set_drvdata(dev, &serial_txx9_ports[line]); 1203 1204 return 0; 1205 } 1206 1207 static void pciserial_txx9_remove_one(struct pci_dev *dev) 1208 { 1209 struct uart_txx9_port *up = pci_get_drvdata(dev); 1210 1211 if (up) { 1212 serial_txx9_unregister_port(up->port.line); 1213 pci_disable_device(dev); 1214 } 1215 } 1216 1217 #ifdef CONFIG_PM 1218 static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state) 1219 { 1220 struct uart_txx9_port *up = pci_get_drvdata(dev); 1221 1222 if (up) 1223 uart_suspend_port(&serial_txx9_reg, &up->port); 1224 pci_save_state(dev); 1225 pci_set_power_state(dev, pci_choose_state(dev, state)); 1226 return 0; 1227 } 1228 1229 static int pciserial_txx9_resume_one(struct pci_dev *dev) 1230 { 1231 struct uart_txx9_port *up = pci_get_drvdata(dev); 1232 1233 pci_set_power_state(dev, PCI_D0); 1234 pci_restore_state(dev); 1235 if (up) 1236 uart_resume_port(&serial_txx9_reg, &up->port); 1237 return 0; 1238 } 1239 #endif 1240 1241 static const struct pci_device_id serial_txx9_pci_tbl[] = { 1242 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_MISC) }, 1243 { 0, } 1244 }; 1245 1246 static struct pci_driver serial_txx9_pci_driver = { 1247 .name = "serial_txx9", 1248 .probe = pciserial_txx9_init_one, 1249 .remove = pciserial_txx9_remove_one, 1250 #ifdef CONFIG_PM 1251 .suspend = pciserial_txx9_suspend_one, 1252 .resume = pciserial_txx9_resume_one, 1253 #endif 1254 .id_table = serial_txx9_pci_tbl, 1255 }; 1256 1257 MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl); 1258 #endif /* ENABLE_SERIAL_TXX9_PCI */ 1259 1260 static struct platform_device *serial_txx9_plat_devs; 1261 1262 static int __init serial_txx9_init(void) 1263 { 1264 int ret; 1265 1266 printk(KERN_INFO "%s version %s\n", serial_name, serial_version); 1267 1268 ret = uart_register_driver(&serial_txx9_reg); 1269 if (ret) 1270 goto out; 1271 1272 serial_txx9_plat_devs = platform_device_alloc("serial_txx9", -1); 1273 if (!serial_txx9_plat_devs) { 1274 ret = -ENOMEM; 1275 goto unreg_uart_drv; 1276 } 1277 1278 ret = platform_device_add(serial_txx9_plat_devs); 1279 if (ret) 1280 goto put_dev; 1281 1282 serial_txx9_register_ports(&serial_txx9_reg, 1283 &serial_txx9_plat_devs->dev); 1284 1285 ret = platform_driver_register(&serial_txx9_plat_driver); 1286 if (ret) 1287 goto del_dev; 1288 1289 #ifdef ENABLE_SERIAL_TXX9_PCI 1290 ret = pci_register_driver(&serial_txx9_pci_driver); 1291 #endif 1292 if (ret == 0) 1293 goto out; 1294 1295 del_dev: 1296 platform_device_del(serial_txx9_plat_devs); 1297 put_dev: 1298 platform_device_put(serial_txx9_plat_devs); 1299 unreg_uart_drv: 1300 uart_unregister_driver(&serial_txx9_reg); 1301 out: 1302 return ret; 1303 } 1304 1305 static void __exit serial_txx9_exit(void) 1306 { 1307 int i; 1308 1309 #ifdef ENABLE_SERIAL_TXX9_PCI 1310 pci_unregister_driver(&serial_txx9_pci_driver); 1311 #endif 1312 platform_driver_unregister(&serial_txx9_plat_driver); 1313 platform_device_unregister(serial_txx9_plat_devs); 1314 for (i = 0; i < UART_NR; i++) { 1315 struct uart_txx9_port *up = &serial_txx9_ports[i]; 1316 if (up->port.iobase || up->port.mapbase) 1317 uart_remove_one_port(&serial_txx9_reg, &up->port); 1318 } 1319 1320 uart_unregister_driver(&serial_txx9_reg); 1321 } 1322 1323 module_init(serial_txx9_init); 1324 module_exit(serial_txx9_exit); 1325 1326 MODULE_LICENSE("GPL"); 1327 MODULE_DESCRIPTION("TX39/49 serial driver"); 1328 1329 MODULE_ALIAS_CHARDEV_MAJOR(TXX9_TTY_MAJOR); 1330