1/* 2 * SC268xx.c: Serial driver for Philiphs SC2681/SC2692 devices. 3 * 4 * Copyright (C) 2006,2007 Thomas Bogend��rfer (tsbogend@alpha.franken.de) 5 */ 6 7#include <linux/module.h> 8#include <linux/kernel.h> 9#include <linux/errno.h> 10#include <linux/tty.h> 11#include <linux/tty_flip.h> 12#include <linux/major.h> 13#include <linux/circ_buf.h> 14#include <linux/serial.h> 15#include <linux/sysrq.h> 16#include <linux/console.h> 17#include <linux/spinlock.h> 18#include <linux/slab.h> 19#include <linux/delay.h> 20#include <linux/init.h> 21#include <linux/platform_device.h> 22#include <linux/irq.h> 23 24#if defined(CONFIG_MAGIC_SYSRQ) 25#define SUPPORT_SYSRQ 26#endif 27 28#include <linux/serial_core.h> 29 30#define SC26XX_MAJOR 204 31#define SC26XX_MINOR_START 205 32#define SC26XX_NR 2 33 34struct uart_sc26xx_port { 35 struct uart_port port[2]; 36 u8 dsr_mask[2]; 37 u8 cts_mask[2]; 38 u8 dcd_mask[2]; 39 u8 ri_mask[2]; 40 u8 dtr_mask[2]; 41 u8 rts_mask[2]; 42 u8 imr; 43}; 44 45/* register common to both ports */ 46#define RD_ISR 0x14 47#define RD_IPR 0x34 48 49#define WR_ACR 0x10 50#define WR_IMR 0x14 51#define WR_OPCR 0x34 52#define WR_OPR_SET 0x38 53#define WR_OPR_CLR 0x3C 54 55/* access common register */ 56#define READ_SC(p, r) readb((p)->membase + RD_##r) 57#define WRITE_SC(p, r, v) writeb((v), (p)->membase + WR_##r) 58 59/* register per port */ 60#define RD_PORT_MRx 0x00 61#define RD_PORT_SR 0x04 62#define RD_PORT_RHR 0x0c 63 64#define WR_PORT_MRx 0x00 65#define WR_PORT_CSR 0x04 66#define WR_PORT_CR 0x08 67#define WR_PORT_THR 0x0c 68 69/* SR bits */ 70#define SR_BREAK (1 << 7) 71#define SR_FRAME (1 << 6) 72#define SR_PARITY (1 << 5) 73#define SR_OVERRUN (1 << 4) 74#define SR_TXRDY (1 << 2) 75#define SR_RXRDY (1 << 0) 76 77#define CR_RES_MR (1 << 4) 78#define CR_RES_RX (2 << 4) 79#define CR_RES_TX (3 << 4) 80#define CR_STRT_BRK (6 << 4) 81#define CR_STOP_BRK (7 << 4) 82#define CR_DIS_TX (1 << 3) 83#define CR_ENA_TX (1 << 2) 84#define CR_DIS_RX (1 << 1) 85#define CR_ENA_RX (1 << 0) 86 87/* ISR bits */ 88#define ISR_RXRDYB (1 << 5) 89#define ISR_TXRDYB (1 << 4) 90#define ISR_RXRDYA (1 << 1) 91#define ISR_TXRDYA (1 << 0) 92 93/* IMR bits */ 94#define IMR_RXRDY (1 << 1) 95#define IMR_TXRDY (1 << 0) 96 97/* access port register */ 98static inline u8 read_sc_port(struct uart_port *p, u8 reg) 99{ 100 return readb(p->membase + p->line * 0x20 + reg); 101} 102 103static inline void write_sc_port(struct uart_port *p, u8 reg, u8 val) 104{ 105 writeb(val, p->membase + p->line * 0x20 + reg); 106} 107 108#define READ_SC_PORT(p, r) read_sc_port(p, RD_PORT_##r) 109#define WRITE_SC_PORT(p, r, v) write_sc_port(p, WR_PORT_##r, v) 110 111static void sc26xx_enable_irq(struct uart_port *port, int mask) 112{ 113 struct uart_sc26xx_port *up; 114 int line = port->line; 115 116 port -= line; 117 up = container_of(port, struct uart_sc26xx_port, port[0]); 118 119 up->imr |= mask << (line * 4); 120 WRITE_SC(port, IMR, up->imr); 121} 122 123static void sc26xx_disable_irq(struct uart_port *port, int mask) 124{ 125 struct uart_sc26xx_port *up; 126 int line = port->line; 127 128 port -= line; 129 up = container_of(port, struct uart_sc26xx_port, port[0]); 130 131 up->imr &= ~(mask << (line * 4)); 132 WRITE_SC(port, IMR, up->imr); 133} 134 135static struct tty_struct *receive_chars(struct uart_port *port) 136{ 137 struct tty_struct *tty = NULL; 138 int limit = 10000; 139 unsigned char ch; 140 char flag; 141 u8 status; 142 143 if (port->state != NULL) /* Unopened serial console */ 144 tty = port->state->port.tty; 145 146 while (limit-- > 0) { 147 status = READ_SC_PORT(port, SR); 148 if (!(status & SR_RXRDY)) 149 break; 150 ch = READ_SC_PORT(port, RHR); 151 152 flag = TTY_NORMAL; 153 port->icount.rx++; 154 155 if (unlikely(status & (SR_BREAK | SR_FRAME | 156 SR_PARITY | SR_OVERRUN))) { 157 if (status & SR_BREAK) { 158 status &= ~(SR_PARITY | SR_FRAME); 159 port->icount.brk++; 160 if (uart_handle_break(port)) 161 continue; 162 } else if (status & SR_PARITY) 163 port->icount.parity++; 164 else if (status & SR_FRAME) 165 port->icount.frame++; 166 if (status & SR_OVERRUN) 167 port->icount.overrun++; 168 169 status &= port->read_status_mask; 170 if (status & SR_BREAK) 171 flag = TTY_BREAK; 172 else if (status & SR_PARITY) 173 flag = TTY_PARITY; 174 else if (status & SR_FRAME) 175 flag = TTY_FRAME; 176 } 177 178 if (uart_handle_sysrq_char(port, ch)) 179 continue; 180 181 if (status & port->ignore_status_mask) 182 continue; 183 184 tty_insert_flip_char(tty, ch, flag); 185 } 186 return tty; 187} 188 189static void transmit_chars(struct uart_port *port) 190{ 191 struct circ_buf *xmit; 192 193 if (!port->state) 194 return; 195 196 xmit = &port->state->xmit; 197 if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { 198 sc26xx_disable_irq(port, IMR_TXRDY); 199 return; 200 } 201 while (!uart_circ_empty(xmit)) { 202 if (!(READ_SC_PORT(port, SR) & SR_TXRDY)) 203 break; 204 205 WRITE_SC_PORT(port, THR, xmit->buf[xmit->tail]); 206 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); 207 port->icount.tx++; 208 } 209 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) 210 uart_write_wakeup(port); 211} 212 213static irqreturn_t sc26xx_interrupt(int irq, void *dev_id) 214{ 215 struct uart_sc26xx_port *up = dev_id; 216 struct tty_struct *tty; 217 unsigned long flags; 218 u8 isr; 219 220 spin_lock_irqsave(&up->port[0].lock, flags); 221 222 tty = NULL; 223 isr = READ_SC(&up->port[0], ISR); 224 if (isr & ISR_TXRDYA) 225 transmit_chars(&up->port[0]); 226 if (isr & ISR_RXRDYA) 227 tty = receive_chars(&up->port[0]); 228 229 spin_unlock(&up->port[0].lock); 230 231 if (tty) 232 tty_flip_buffer_push(tty); 233 234 spin_lock(&up->port[1].lock); 235 236 tty = NULL; 237 if (isr & ISR_TXRDYB) 238 transmit_chars(&up->port[1]); 239 if (isr & ISR_RXRDYB) 240 tty = receive_chars(&up->port[1]); 241 242 spin_unlock_irqrestore(&up->port[1].lock, flags); 243 244 if (tty) 245 tty_flip_buffer_push(tty); 246 247 return IRQ_HANDLED; 248} 249 250/* port->lock is not held. */ 251static unsigned int sc26xx_tx_empty(struct uart_port *port) 252{ 253 return (READ_SC_PORT(port, SR) & SR_TXRDY) ? TIOCSER_TEMT : 0; 254} 255 256/* port->lock held by caller. */ 257static void sc26xx_set_mctrl(struct uart_port *port, unsigned int mctrl) 258{ 259 struct uart_sc26xx_port *up; 260 int line = port->line; 261 262 port -= line; 263 up = container_of(port, struct uart_sc26xx_port, port[0]); 264 265 if (up->dtr_mask[line]) { 266 if (mctrl & TIOCM_DTR) 267 WRITE_SC(port, OPR_SET, up->dtr_mask[line]); 268 else 269 WRITE_SC(port, OPR_CLR, up->dtr_mask[line]); 270 } 271 if (up->rts_mask[line]) { 272 if (mctrl & TIOCM_RTS) 273 WRITE_SC(port, OPR_SET, up->rts_mask[line]); 274 else 275 WRITE_SC(port, OPR_CLR, up->rts_mask[line]); 276 } 277} 278 279/* port->lock is held by caller and interrupts are disabled. */ 280static unsigned int sc26xx_get_mctrl(struct uart_port *port) 281{ 282 struct uart_sc26xx_port *up; 283 int line = port->line; 284 unsigned int mctrl = TIOCM_DSR | TIOCM_CTS | TIOCM_CAR; 285 u8 ipr; 286 287 port -= line; 288 up = container_of(port, struct uart_sc26xx_port, port[0]); 289 ipr = READ_SC(port, IPR) ^ 0xff; 290 291 if (up->dsr_mask[line]) { 292 mctrl &= ~TIOCM_DSR; 293 mctrl |= ipr & up->dsr_mask[line] ? TIOCM_DSR : 0; 294 } 295 if (up->cts_mask[line]) { 296 mctrl &= ~TIOCM_CTS; 297 mctrl |= ipr & up->cts_mask[line] ? TIOCM_CTS : 0; 298 } 299 if (up->dcd_mask[line]) { 300 mctrl &= ~TIOCM_CAR; 301 mctrl |= ipr & up->dcd_mask[line] ? TIOCM_CAR : 0; 302 } 303 if (up->ri_mask[line]) { 304 mctrl &= ~TIOCM_RNG; 305 mctrl |= ipr & up->ri_mask[line] ? TIOCM_RNG : 0; 306 } 307 return mctrl; 308} 309 310/* port->lock held by caller. */ 311static void sc26xx_stop_tx(struct uart_port *port) 312{ 313 return; 314} 315 316/* port->lock held by caller. */ 317static void sc26xx_start_tx(struct uart_port *port) 318{ 319 struct circ_buf *xmit = &port->state->xmit; 320 321 while (!uart_circ_empty(xmit)) { 322 if (!(READ_SC_PORT(port, SR) & SR_TXRDY)) { 323 sc26xx_enable_irq(port, IMR_TXRDY); 324 break; 325 } 326 WRITE_SC_PORT(port, THR, xmit->buf[xmit->tail]); 327 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); 328 port->icount.tx++; 329 } 330} 331 332/* port->lock held by caller. */ 333static void sc26xx_stop_rx(struct uart_port *port) 334{ 335} 336 337/* port->lock held by caller. */ 338static void sc26xx_enable_ms(struct uart_port *port) 339{ 340} 341 342/* port->lock is not held. */ 343static void sc26xx_break_ctl(struct uart_port *port, int break_state) 344{ 345 if (break_state == -1) 346 WRITE_SC_PORT(port, CR, CR_STRT_BRK); 347 else 348 WRITE_SC_PORT(port, CR, CR_STOP_BRK); 349} 350 351/* port->lock is not held. */ 352static int sc26xx_startup(struct uart_port *port) 353{ 354 sc26xx_disable_irq(port, IMR_TXRDY | IMR_RXRDY); 355 WRITE_SC(port, OPCR, 0); 356 357 /* reset tx and rx */ 358 WRITE_SC_PORT(port, CR, CR_RES_RX); 359 WRITE_SC_PORT(port, CR, CR_RES_TX); 360 361 /* start rx/tx */ 362 WRITE_SC_PORT(port, CR, CR_ENA_TX | CR_ENA_RX); 363 364 /* enable irqs */ 365 sc26xx_enable_irq(port, IMR_RXRDY); 366 return 0; 367} 368 369/* port->lock is not held. */ 370static void sc26xx_shutdown(struct uart_port *port) 371{ 372 /* disable interrupst */ 373 sc26xx_disable_irq(port, IMR_TXRDY | IMR_RXRDY); 374 375 /* stop tx/rx */ 376 WRITE_SC_PORT(port, CR, CR_DIS_TX | CR_DIS_RX); 377} 378 379/* port->lock is not held. */ 380static void sc26xx_set_termios(struct uart_port *port, struct ktermios *termios, 381 struct ktermios *old) 382{ 383 unsigned int baud = uart_get_baud_rate(port, termios, old, 0, 4000000); 384 unsigned int quot = uart_get_divisor(port, baud); 385 unsigned int iflag, cflag; 386 unsigned long flags; 387 u8 mr1, mr2, csr; 388 389 spin_lock_irqsave(&port->lock, flags); 390 391 while ((READ_SC_PORT(port, SR) & ((1 << 3) | (1 << 2))) != 0xc) 392 udelay(2); 393 394 WRITE_SC_PORT(port, CR, CR_DIS_TX | CR_DIS_RX); 395 396 iflag = termios->c_iflag; 397 cflag = termios->c_cflag; 398 399 port->read_status_mask = SR_OVERRUN; 400 if (iflag & INPCK) 401 port->read_status_mask |= SR_PARITY | SR_FRAME; 402 if (iflag & (BRKINT | PARMRK)) 403 port->read_status_mask |= SR_BREAK; 404 405 port->ignore_status_mask = 0; 406 if (iflag & IGNBRK) 407 port->ignore_status_mask |= SR_BREAK; 408 if ((cflag & CREAD) == 0) 409 port->ignore_status_mask |= SR_BREAK | SR_FRAME | 410 SR_PARITY | SR_OVERRUN; 411 412 switch (cflag & CSIZE) { 413 case CS5: 414 mr1 = 0x00; 415 break; 416 case CS6: 417 mr1 = 0x01; 418 break; 419 case CS7: 420 mr1 = 0x02; 421 break; 422 default: 423 case CS8: 424 mr1 = 0x03; 425 break; 426 } 427 mr2 = 0x07; 428 if (cflag & CSTOPB) 429 mr2 = 0x0f; 430 if (cflag & PARENB) { 431 if (cflag & PARODD) 432 mr1 |= (1 << 2); 433 } else 434 mr1 |= (2 << 3); 435 436 switch (baud) { 437 case 50: 438 csr = 0x00; 439 break; 440 case 110: 441 csr = 0x11; 442 break; 443 case 134: 444 csr = 0x22; 445 break; 446 case 200: 447 csr = 0x33; 448 break; 449 case 300: 450 csr = 0x44; 451 break; 452 case 600: 453 csr = 0x55; 454 break; 455 case 1200: 456 csr = 0x66; 457 break; 458 case 2400: 459 csr = 0x88; 460 break; 461 case 4800: 462 csr = 0x99; 463 break; 464 default: 465 case 9600: 466 csr = 0xbb; 467 break; 468 case 19200: 469 csr = 0xcc; 470 break; 471 } 472 473 WRITE_SC_PORT(port, CR, CR_RES_MR); 474 WRITE_SC_PORT(port, MRx, mr1); 475 WRITE_SC_PORT(port, MRx, mr2); 476 477 WRITE_SC(port, ACR, 0x80); 478 WRITE_SC_PORT(port, CSR, csr); 479 480 /* reset tx and rx */ 481 WRITE_SC_PORT(port, CR, CR_RES_RX); 482 WRITE_SC_PORT(port, CR, CR_RES_TX); 483 484 WRITE_SC_PORT(port, CR, CR_ENA_TX | CR_ENA_RX); 485 while ((READ_SC_PORT(port, SR) & ((1 << 3) | (1 << 2))) != 0xc) 486 udelay(2); 487 488 uart_update_timeout(port, cflag, 489 (port->uartclk / (16 * quot))); 490 491 spin_unlock_irqrestore(&port->lock, flags); 492} 493 494static const char *sc26xx_type(struct uart_port *port) 495{ 496 return "SC26XX"; 497} 498 499static void sc26xx_release_port(struct uart_port *port) 500{ 501} 502 503static int sc26xx_request_port(struct uart_port *port) 504{ 505 return 0; 506} 507 508static void sc26xx_config_port(struct uart_port *port, int flags) 509{ 510} 511 512static int sc26xx_verify_port(struct uart_port *port, struct serial_struct *ser) 513{ 514 return -EINVAL; 515} 516 517static struct uart_ops sc26xx_ops = { 518 .tx_empty = sc26xx_tx_empty, 519 .set_mctrl = sc26xx_set_mctrl, 520 .get_mctrl = sc26xx_get_mctrl, 521 .stop_tx = sc26xx_stop_tx, 522 .start_tx = sc26xx_start_tx, 523 .stop_rx = sc26xx_stop_rx, 524 .enable_ms = sc26xx_enable_ms, 525 .break_ctl = sc26xx_break_ctl, 526 .startup = sc26xx_startup, 527 .shutdown = sc26xx_shutdown, 528 .set_termios = sc26xx_set_termios, 529 .type = sc26xx_type, 530 .release_port = sc26xx_release_port, 531 .request_port = sc26xx_request_port, 532 .config_port = sc26xx_config_port, 533 .verify_port = sc26xx_verify_port, 534}; 535 536static struct uart_port *sc26xx_port; 537 538#ifdef CONFIG_SERIAL_SC26XX_CONSOLE 539static void sc26xx_console_putchar(struct uart_port *port, char c) 540{ 541 unsigned long flags; 542 int limit = 1000000; 543 544 spin_lock_irqsave(&port->lock, flags); 545 546 while (limit-- > 0) { 547 if (READ_SC_PORT(port, SR) & SR_TXRDY) { 548 WRITE_SC_PORT(port, THR, c); 549 break; 550 } 551 udelay(2); 552 } 553 554 spin_unlock_irqrestore(&port->lock, flags); 555} 556 557static void sc26xx_console_write(struct console *con, const char *s, unsigned n) 558{ 559 struct uart_port *port = sc26xx_port; 560 int i; 561 562 for (i = 0; i < n; i++) { 563 if (*s == '\n') 564 sc26xx_console_putchar(port, '\r'); 565 sc26xx_console_putchar(port, *s++); 566 } 567} 568 569static int __init sc26xx_console_setup(struct console *con, char *options) 570{ 571 struct uart_port *port = sc26xx_port; 572 int baud = 9600; 573 int bits = 8; 574 int parity = 'n'; 575 int flow = 'n'; 576 577 if (port->type != PORT_SC26XX) 578 return -1; 579 580 printk(KERN_INFO "Console: ttySC%d (SC26XX)\n", con->index); 581 if (options) 582 uart_parse_options(options, &baud, &parity, &bits, &flow); 583 584 return uart_set_options(port, con, baud, parity, bits, flow); 585} 586 587static struct uart_driver sc26xx_reg; 588static struct console sc26xx_console = { 589 .name = "ttySC", 590 .write = sc26xx_console_write, 591 .device = uart_console_device, 592 .setup = sc26xx_console_setup, 593 .flags = CON_PRINTBUFFER, 594 .index = -1, 595 .data = &sc26xx_reg, 596}; 597#define SC26XX_CONSOLE &sc26xx_console 598#else 599#define SC26XX_CONSOLE NULL 600#endif 601 602static struct uart_driver sc26xx_reg = { 603 .owner = THIS_MODULE, 604 .driver_name = "SC26xx", 605 .dev_name = "ttySC", 606 .major = SC26XX_MAJOR, 607 .minor = SC26XX_MINOR_START, 608 .nr = SC26XX_NR, 609 .cons = SC26XX_CONSOLE, 610}; 611 612static u8 sc26xx_flags2mask(unsigned int flags, unsigned int bitpos) 613{ 614 unsigned int bit = (flags >> bitpos) & 15; 615 616 return bit ? (1 << (bit - 1)) : 0; 617} 618 619static void __devinit sc26xx_init_masks(struct uart_sc26xx_port *up, 620 int line, unsigned int data) 621{ 622 up->dtr_mask[line] = sc26xx_flags2mask(data, 0); 623 up->rts_mask[line] = sc26xx_flags2mask(data, 4); 624 up->dsr_mask[line] = sc26xx_flags2mask(data, 8); 625 up->cts_mask[line] = sc26xx_flags2mask(data, 12); 626 up->dcd_mask[line] = sc26xx_flags2mask(data, 16); 627 up->ri_mask[line] = sc26xx_flags2mask(data, 20); 628} 629 630static int __devinit sc26xx_probe(struct platform_device *dev) 631{ 632 struct resource *res; 633 struct uart_sc26xx_port *up; 634 unsigned int *sc26xx_data = dev->dev.platform_data; 635 int err; 636 637 res = platform_get_resource(dev, IORESOURCE_MEM, 0); 638 if (!res) 639 return -ENODEV; 640 641 up = kzalloc(sizeof *up, GFP_KERNEL); 642 if (unlikely(!up)) 643 return -ENOMEM; 644 645 up->port[0].line = 0; 646 up->port[0].ops = &sc26xx_ops; 647 up->port[0].type = PORT_SC26XX; 648 up->port[0].uartclk = (29491200 / 16); /* arbitrary */ 649 650 up->port[0].mapbase = res->start; 651 up->port[0].membase = ioremap_nocache(up->port[0].mapbase, 0x40); 652 up->port[0].iotype = UPIO_MEM; 653 up->port[0].irq = platform_get_irq(dev, 0); 654 655 up->port[0].dev = &dev->dev; 656 657 sc26xx_init_masks(up, 0, sc26xx_data[0]); 658 659 sc26xx_port = &up->port[0]; 660 661 up->port[1].line = 1; 662 up->port[1].ops = &sc26xx_ops; 663 up->port[1].type = PORT_SC26XX; 664 up->port[1].uartclk = (29491200 / 16); /* arbitrary */ 665 666 up->port[1].mapbase = up->port[0].mapbase; 667 up->port[1].membase = up->port[0].membase; 668 up->port[1].iotype = UPIO_MEM; 669 up->port[1].irq = up->port[0].irq; 670 671 up->port[1].dev = &dev->dev; 672 673 sc26xx_init_masks(up, 1, sc26xx_data[1]); 674 675 err = uart_register_driver(&sc26xx_reg); 676 if (err) 677 goto out_free_port; 678 679 sc26xx_reg.tty_driver->name_base = sc26xx_reg.minor; 680 681 err = uart_add_one_port(&sc26xx_reg, &up->port[0]); 682 if (err) 683 goto out_unregister_driver; 684 685 err = uart_add_one_port(&sc26xx_reg, &up->port[1]); 686 if (err) 687 goto out_remove_port0; 688 689 err = request_irq(up->port[0].irq, sc26xx_interrupt, 0, "sc26xx", up); 690 if (err) 691 goto out_remove_ports; 692 693 dev_set_drvdata(&dev->dev, up); 694 return 0; 695 696out_remove_ports: 697 uart_remove_one_port(&sc26xx_reg, &up->port[1]); 698out_remove_port0: 699 uart_remove_one_port(&sc26xx_reg, &up->port[0]); 700 701out_unregister_driver: 702 uart_unregister_driver(&sc26xx_reg); 703 704out_free_port: 705 kfree(up); 706 sc26xx_port = NULL; 707 return err; 708} 709 710 711static int __exit sc26xx_driver_remove(struct platform_device *dev) 712{ 713 struct uart_sc26xx_port *up = dev_get_drvdata(&dev->dev); 714 715 free_irq(up->port[0].irq, up); 716 717 uart_remove_one_port(&sc26xx_reg, &up->port[0]); 718 uart_remove_one_port(&sc26xx_reg, &up->port[1]); 719 720 uart_unregister_driver(&sc26xx_reg); 721 722 kfree(up); 723 sc26xx_port = NULL; 724 725 dev_set_drvdata(&dev->dev, NULL); 726 return 0; 727} 728 729static struct platform_driver sc26xx_driver = { 730 .probe = sc26xx_probe, 731 .remove = __devexit_p(sc26xx_driver_remove), 732 .driver = { 733 .name = "SC26xx", 734 .owner = THIS_MODULE, 735 }, 736}; 737 738static int __init sc26xx_init(void) 739{ 740 return platform_driver_register(&sc26xx_driver); 741} 742 743static void __exit sc26xx_exit(void) 744{ 745 platform_driver_unregister(&sc26xx_driver); 746} 747 748module_init(sc26xx_init); 749module_exit(sc26xx_exit); 750 751 752MODULE_AUTHOR("Thomas Bogend��rfer"); 753MODULE_DESCRIPTION("SC681/SC2692 serial driver"); 754MODULE_VERSION("1.0"); 755MODULE_LICENSE("GPL"); 756MODULE_ALIAS("platform:SC26xx"); 757