sunsu.c 37.3 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14
/* $Id: su.c,v 1.55 2002/01/08 16:00:16 davem Exp $
 * su.c: Small serial driver for keyboard/mouse interface on sparc32/PCI
 *
 * Copyright (C) 1997  Eddie C. Dost  (ecd@skynet.be)
 * Copyright (C) 1998-1999  Pete Zaitcev   (zaitcev@yahoo.com)
 *
 * This is mainly a variation of 8250.c, credits go to authors mentioned
 * therein.  In fact this driver should be merged into the generic 8250.c
 * infrastructure perhaps using a 8250_sparc.c module.
 *
 * Fixed to use tty_get_baud_rate().
 *   Theodore Ts'o <tytso@mit.edu>, 2001-Oct-12
 *
 * Converted to new 2.5.x UART layer.
15
 *   David S. Miller (davem@davemloft.net), 2002-Jul-29
Linus Torvalds's avatar
Linus Torvalds committed
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/errno.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/major.h>
#include <linux/string.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/circ_buf.h>
#include <linux/serial.h>
#include <linux/sysrq.h>
#include <linux/console.h>
#ifdef CONFIG_SERIO
#include <linux/serio.h>
#endif
#include <linux/serial_reg.h>
#include <linux/init.h>
#include <linux/delay.h>

#include <asm/io.h>
#include <asm/irq.h>
42 43
#include <asm/prom.h>
#include <asm/of_device.h>
Linus Torvalds's avatar
Linus Torvalds committed
44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92

#if defined(CONFIG_SERIAL_SUNSU_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
#define SUPPORT_SYSRQ
#endif

#include <linux/serial_core.h>

#include "suncore.h"

/* We are on a NS PC87303 clocked with 24.0 MHz, which results
 * in a UART clock of 1.8462 MHz.
 */
#define SU_BASE_BAUD	(1846200 / 16)

enum su_type { SU_PORT_NONE, SU_PORT_MS, SU_PORT_KBD, SU_PORT_PORT };
static char *su_typev[] = { "su(???)", "su(mouse)", "su(kbd)", "su(serial)" };

/*
 * Here we define the default xmit fifo size used for each type of UART.
 */
static const struct serial_uart_config uart_config[PORT_MAX_8250+1] = {
	{ "unknown",	1,	0 },
	{ "8250",	1,	0 },
	{ "16450",	1,	0 },
	{ "16550",	1,	0 },
	{ "16550A",	16,	UART_CLEAR_FIFO | UART_USE_FIFO },
	{ "Cirrus",	1, 	0 },
	{ "ST16650",	1,	UART_CLEAR_FIFO | UART_STARTECH },
	{ "ST16650V2",	32,	UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH },
	{ "TI16750",	64,	UART_CLEAR_FIFO | UART_USE_FIFO },
	{ "Startech",	1,	0 },
	{ "16C950/954",	128,	UART_CLEAR_FIFO | UART_USE_FIFO },
	{ "ST16654",	64,	UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH },
	{ "XR16850",	128,	UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH },
	{ "RSA",	2048,	UART_CLEAR_FIFO | UART_USE_FIFO }
};

struct uart_sunsu_port {
	struct uart_port	port;
	unsigned char		acr;
	unsigned char		ier;
	unsigned short		rev;
	unsigned char		lcr;
	unsigned int		lsr_break_flag;
	unsigned int		cflag;

	/* Probing information.  */
	enum su_type		su_type;
	unsigned int		type_probed;	/* XXX Stupid */
93
	unsigned long		reg_size;
Linus Torvalds's avatar
Linus Torvalds committed
94 95

#ifdef CONFIG_SERIO
96
	struct serio		serio;
Linus Torvalds's avatar
Linus Torvalds committed
97 98 99 100
	int			serio_open;
#endif
};

Adrian Bunk's avatar
Adrian Bunk committed
101
static unsigned int serial_in(struct uart_sunsu_port *up, int offset)
Linus Torvalds's avatar
Linus Torvalds committed
102 103 104 105
{
	offset <<= up->port.regshift;

	switch (up->port.iotype) {
106
	case UPIO_HUB6:
Linus Torvalds's avatar
Linus Torvalds committed
107 108 109
		outb(up->port.hub6 - 1 + offset, up->port.iobase);
		return inb(up->port.iobase + 1);

110
	case UPIO_MEM:
Linus Torvalds's avatar
Linus Torvalds committed
111 112 113 114 115 116 117
		return readb(up->port.membase + offset);

	default:
		return inb(up->port.iobase + offset);
	}
}

Adrian Bunk's avatar
Adrian Bunk committed
118
static void serial_out(struct uart_sunsu_port *up, int offset, int value)
Linus Torvalds's avatar
Linus Torvalds committed
119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134
{
#ifndef CONFIG_SPARC64
	/*
	 * MrCoffee has weird schematics: IRQ4 & P10(?) pins of SuperIO are
	 * connected with a gate then go to SlavIO. When IRQ4 goes tristated
	 * gate outputs a logical one. Since we use level triggered interrupts
	 * we have lockup and watchdog reset. We cannot mask IRQ because
	 * keyboard shares IRQ with us (Word has it as Bob Smelik's design).
	 * This problem is similar to what Alpha people suffer, see serial.c.
	 */
	if (offset == UART_MCR)
		value |= UART_MCR_OUT2;
#endif
	offset <<= up->port.regshift;

	switch (up->port.iotype) {
135
	case UPIO_HUB6:
Linus Torvalds's avatar
Linus Torvalds committed
136 137 138 139
		outb(up->port.hub6 - 1 + offset, up->port.iobase);
		outb(value, up->port.iobase + 1);
		break;

140
	case UPIO_MEM:
Linus Torvalds's avatar
Linus Torvalds committed
141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250
		writeb(value, up->port.membase + offset);
		break;

	default:
		outb(value, up->port.iobase + offset);
	}
}

/*
 * We used to support using pause I/O for certain machines.  We
 * haven't supported this for a while, but just in case it's badly
 * needed for certain old 386 machines, I've left these #define's
 * in....
 */
#define serial_inp(up, offset)		serial_in(up, offset)
#define serial_outp(up, offset, value)	serial_out(up, offset, value)


/*
 * For the 16C950
 */
static void serial_icr_write(struct uart_sunsu_port *up, int offset, int value)
{
	serial_out(up, UART_SCR, offset);
	serial_out(up, UART_ICR, value);
}

#if 0 /* Unused currently */
static unsigned int serial_icr_read(struct uart_sunsu_port *up, int offset)
{
	unsigned int value;

	serial_icr_write(up, UART_ACR, up->acr | UART_ACR_ICRRD);
	serial_out(up, UART_SCR, offset);
	value = serial_in(up, UART_ICR);
	serial_icr_write(up, UART_ACR, up->acr);

	return value;
}
#endif

#ifdef CONFIG_SERIAL_8250_RSA
/*
 * Attempts to turn on the RSA FIFO.  Returns zero on failure.
 * We set the port uart clock rate if we succeed.
 */
static int __enable_rsa(struct uart_sunsu_port *up)
{
	unsigned char mode;
	int result;

	mode = serial_inp(up, UART_RSA_MSR);
	result = mode & UART_RSA_MSR_FIFO;

	if (!result) {
		serial_outp(up, UART_RSA_MSR, mode | UART_RSA_MSR_FIFO);
		mode = serial_inp(up, UART_RSA_MSR);
		result = mode & UART_RSA_MSR_FIFO;
	}

	if (result)
		up->port.uartclk = SERIAL_RSA_BAUD_BASE * 16;

	return result;
}

static void enable_rsa(struct uart_sunsu_port *up)
{
	if (up->port.type == PORT_RSA) {
		if (up->port.uartclk != SERIAL_RSA_BAUD_BASE * 16) {
			spin_lock_irq(&up->port.lock);
			__enable_rsa(up);
			spin_unlock_irq(&up->port.lock);
		}
		if (up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16)
			serial_outp(up, UART_RSA_FRR, 0);
	}
}

/*
 * Attempts to turn off the RSA FIFO.  Returns zero on failure.
 * It is unknown why interrupts were disabled in here.  However,
 * the caller is expected to preserve this behaviour by grabbing
 * the spinlock before calling this function.
 */
static void disable_rsa(struct uart_sunsu_port *up)
{
	unsigned char mode;
	int result;

	if (up->port.type == PORT_RSA &&
	    up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) {
		spin_lock_irq(&up->port.lock);

		mode = serial_inp(up, UART_RSA_MSR);
		result = !(mode & UART_RSA_MSR_FIFO);

		if (!result) {
			serial_outp(up, UART_RSA_MSR, mode & ~UART_RSA_MSR_FIFO);
			mode = serial_inp(up, UART_RSA_MSR);
			result = !(mode & UART_RSA_MSR_FIFO);
		}

		if (result)
			up->port.uartclk = SERIAL_RSA_BAUD_BASE_LO * 16;
		spin_unlock_irq(&up->port.lock);
	}
}
#endif /* CONFIG_SERIAL_8250_RSA */

251 252 253 254 255 256 257 258 259
static inline void __stop_tx(struct uart_sunsu_port *p)
{
	if (p->ier & UART_IER_THRI) {
		p->ier &= ~UART_IER_THRI;
		serial_out(p, UART_IER, p->ier);
	}
}

static void sunsu_stop_tx(struct uart_port *port)
Linus Torvalds's avatar
Linus Torvalds committed
260 261 262
{
	struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;

263 264
	__stop_tx(up);

Al Viro's avatar
Al Viro committed
265 266 267 268
	/*
	 * We really want to stop the transmitter from sending.
	 */
	if (up->port.type == PORT_16C950) {
Linus Torvalds's avatar
Linus Torvalds committed
269 270 271 272 273
		up->acr |= UART_ACR_TXDIS;
		serial_icr_write(up, UART_ACR, up->acr);
	}
}

274
static void sunsu_start_tx(struct uart_port *port)
Linus Torvalds's avatar
Linus Torvalds committed
275 276 277 278 279 280 281
{
	struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;

	if (!(up->ier & UART_IER_THRI)) {
		up->ier |= UART_IER_THRI;
		serial_out(up, UART_IER, up->ier);
	}
Al Viro's avatar
Al Viro committed
282

Linus Torvalds's avatar
Linus Torvalds committed
283
	/*
Al Viro's avatar
Al Viro committed
284
	 * Re-enable the transmitter if we disabled it.
Linus Torvalds's avatar
Linus Torvalds committed
285
	 */
Al Viro's avatar
Al Viro committed
286
	if (up->port.type == PORT_16C950 && up->acr & UART_ACR_TXDIS) {
Linus Torvalds's avatar
Linus Torvalds committed
287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311
		up->acr &= ~UART_ACR_TXDIS;
		serial_icr_write(up, UART_ACR, up->acr);
	}
}

static void sunsu_stop_rx(struct uart_port *port)
{
	struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;

	up->ier &= ~UART_IER_RLSI;
	up->port.read_status_mask &= ~UART_LSR_DR;
	serial_out(up, UART_IER, up->ier);
}

static void sunsu_enable_ms(struct uart_port *port)
{
	struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
	unsigned long flags;

	spin_lock_irqsave(&up->port.lock, flags);
	up->ier |= UART_IER_MSI;
	serial_out(up, UART_IER, up->ier);
	spin_unlock_irqrestore(&up->port.lock, flags);
}

Adrian Bunk's avatar
Adrian Bunk committed
312
static struct tty_struct *
313
receive_chars(struct uart_sunsu_port *up, unsigned char *status)
Linus Torvalds's avatar
Linus Torvalds committed
314 315
{
	struct tty_struct *tty = up->port.info->tty;
Alan Cox's avatar
Alan Cox committed
316
	unsigned char ch, flag;
Linus Torvalds's avatar
Linus Torvalds committed
317 318 319 320 321
	int max_count = 256;
	int saw_console_brk = 0;

	do {
		ch = serial_inp(up, UART_RX);
Alan Cox's avatar
Alan Cox committed
322
		flag = TTY_NORMAL;
Linus Torvalds's avatar
Linus Torvalds committed
323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363
		up->port.icount.rx++;

		if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE |
				       UART_LSR_FE | UART_LSR_OE))) {
			/*
			 * For statistics only
			 */
			if (*status & UART_LSR_BI) {
				*status &= ~(UART_LSR_FE | UART_LSR_PE);
				up->port.icount.brk++;
				if (up->port.cons != NULL &&
				    up->port.line == up->port.cons->index)
					saw_console_brk = 1;
				/*
				 * We do the SysRQ and SAK checking
				 * here because otherwise the break
				 * may get masked by ignore_status_mask
				 * or read_status_mask.
				 */
				if (uart_handle_break(&up->port))
					goto ignore_char;
			} else if (*status & UART_LSR_PE)
				up->port.icount.parity++;
			else if (*status & UART_LSR_FE)
				up->port.icount.frame++;
			if (*status & UART_LSR_OE)
				up->port.icount.overrun++;

			/*
			 * Mask off conditions which should be ingored.
			 */
			*status &= up->port.read_status_mask;

			if (up->port.cons != NULL &&
			    up->port.line == up->port.cons->index) {
				/* Recover the break flag from console xmit */
				*status |= up->lsr_break_flag;
				up->lsr_break_flag = 0;
			}

			if (*status & UART_LSR_BI) {
Alan Cox's avatar
Alan Cox committed
364
				flag = TTY_BREAK;
Linus Torvalds's avatar
Linus Torvalds committed
365
			} else if (*status & UART_LSR_PE)
Alan Cox's avatar
Alan Cox committed
366
				flag = TTY_PARITY;
Linus Torvalds's avatar
Linus Torvalds committed
367
			else if (*status & UART_LSR_FE)
Alan Cox's avatar
Alan Cox committed
368
				flag = TTY_FRAME;
Linus Torvalds's avatar
Linus Torvalds committed
369
		}
370
		if (uart_handle_sysrq_char(&up->port, ch))
Linus Torvalds's avatar
Linus Torvalds committed
371
			goto ignore_char;
Alan Cox's avatar
Alan Cox committed
372 373 374
		if ((*status & up->port.ignore_status_mask) == 0)
			tty_insert_flip_char(tty, ch, flag);
		if (*status & UART_LSR_OE)
Linus Torvalds's avatar
Linus Torvalds committed
375 376 377 378 379
			/*
			 * Overrun is special, since it's reported
			 * immediately, and doesn't affect the current
			 * character.
			 */
Alan Cox's avatar
Alan Cox committed
380
			 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
Linus Torvalds's avatar
Linus Torvalds committed
381 382 383 384 385 386 387 388 389 390
	ignore_char:
		*status = serial_inp(up, UART_LSR);
	} while ((*status & UART_LSR_DR) && (max_count-- > 0));

	if (saw_console_brk)
		sun_do_break();

	return tty;
}

Adrian Bunk's avatar
Adrian Bunk committed
391
static void transmit_chars(struct uart_sunsu_port *up)
Linus Torvalds's avatar
Linus Torvalds committed
392 393 394 395 396 397 398 399 400 401
{
	struct circ_buf *xmit = &up->port.info->xmit;
	int count;

	if (up->port.x_char) {
		serial_outp(up, UART_TX, up->port.x_char);
		up->port.icount.tx++;
		up->port.x_char = 0;
		return;
	}
402 403 404 405 406 407
	if (uart_tx_stopped(&up->port)) {
		sunsu_stop_tx(&up->port);
		return;
	}
	if (uart_circ_empty(xmit)) {
		__stop_tx(up);
Linus Torvalds's avatar
Linus Torvalds committed
408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423
		return;
	}

	count = up->port.fifosize;
	do {
		serial_out(up, UART_TX, xmit->buf[xmit->tail]);
		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
		up->port.icount.tx++;
		if (uart_circ_empty(xmit))
			break;
	} while (--count > 0);

	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
		uart_write_wakeup(&up->port);

	if (uart_circ_empty(xmit))
424
		__stop_tx(up);
Linus Torvalds's avatar
Linus Torvalds committed
425 426
}

Adrian Bunk's avatar
Adrian Bunk committed
427
static void check_modem_status(struct uart_sunsu_port *up)
Linus Torvalds's avatar
Linus Torvalds committed
428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447
{
	int status;

	status = serial_in(up, UART_MSR);

	if ((status & UART_MSR_ANY_DELTA) == 0)
		return;

	if (status & UART_MSR_TERI)
		up->port.icount.rng++;
	if (status & UART_MSR_DDSR)
		up->port.icount.dsr++;
	if (status & UART_MSR_DDCD)
		uart_handle_dcd_change(&up->port, status & UART_MSR_DCD);
	if (status & UART_MSR_DCTS)
		uart_handle_cts_change(&up->port, status & UART_MSR_CTS);

	wake_up_interruptible(&up->port.info->delta_msr_wait);
}

448
static irqreturn_t sunsu_serial_interrupt(int irq, void *dev_id)
Linus Torvalds's avatar
Linus Torvalds committed
449 450 451 452 453 454 455 456 457 458 459 460 461
{
	struct uart_sunsu_port *up = dev_id;
	unsigned long flags;
	unsigned char status;

	spin_lock_irqsave(&up->port.lock, flags);

	do {
		struct tty_struct *tty;

		status = serial_inp(up, UART_LSR);
		tty = NULL;
		if (status & UART_LSR_DR)
462
			tty = receive_chars(up, &status);
Linus Torvalds's avatar
Linus Torvalds committed
463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499
		check_modem_status(up);
		if (status & UART_LSR_THRE)
			transmit_chars(up);

		spin_unlock_irqrestore(&up->port.lock, flags);

		if (tty)
			tty_flip_buffer_push(tty);

		spin_lock_irqsave(&up->port.lock, flags);

	} while (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT));

	spin_unlock_irqrestore(&up->port.lock, flags);

	return IRQ_HANDLED;
}

/* Separate interrupt handling path for keyboard/mouse ports.  */

static void
sunsu_change_speed(struct uart_port *port, unsigned int cflag,
		   unsigned int iflag, unsigned int quot);

static void sunsu_change_mouse_baud(struct uart_sunsu_port *up)
{
	unsigned int cur_cflag = up->cflag;
	int quot, new_baud;

	up->cflag &= ~CBAUD;
	up->cflag |= suncore_mouse_baud_cflag_next(cur_cflag, &new_baud);

	quot = up->port.uartclk / (16 * new_baud);

	sunsu_change_speed(&up->port, up->cflag, 0, quot);
}

500
static void receive_kbd_ms_chars(struct uart_sunsu_port *up, int is_break)
Linus Torvalds's avatar
Linus Torvalds committed
501 502 503 504 505 506 507
{
	do {
		unsigned char ch = serial_inp(up, UART_RX);

		/* Stop-A is handled by drivers/char/keyboard.c now. */
		if (up->su_type == SU_PORT_KBD) {
#ifdef CONFIG_SERIO
508
			serio_interrupt(&up->serio, ch, 0);
Linus Torvalds's avatar
Linus Torvalds committed
509 510 511 512 513 514 515 516 517 518 519 520 521
#endif
		} else if (up->su_type == SU_PORT_MS) {
			int ret = suncore_mouse_baud_detection(ch, is_break);

			switch (ret) {
			case 2:
				sunsu_change_mouse_baud(up);
				/* fallthru */
			case 1:
				break;

			case 0:
#ifdef CONFIG_SERIO
522
				serio_interrupt(&up->serio, ch, 0);
Linus Torvalds's avatar
Linus Torvalds committed
523 524 525 526 527 528 529
#endif
				break;
			};
		}
	} while (serial_in(up, UART_LSR) & UART_LSR_DR);
}

530
static irqreturn_t sunsu_kbd_ms_interrupt(int irq, void *dev_id)
Linus Torvalds's avatar
Linus Torvalds committed
531 532 533 534 535 536 537
{
	struct uart_sunsu_port *up = dev_id;

	if (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT)) {
		unsigned char status = serial_inp(up, UART_LSR);

		if ((status & UART_LSR_DR) || (status & UART_LSR_BI))
538
			receive_kbd_ms_chars(up, (status & UART_LSR_BI) != 0);
Linus Torvalds's avatar
Linus Torvalds committed
539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638
	}

	return IRQ_HANDLED;
}

static unsigned int sunsu_tx_empty(struct uart_port *port)
{
	struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
	unsigned long flags;
	unsigned int ret;

	spin_lock_irqsave(&up->port.lock, flags);
	ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
	spin_unlock_irqrestore(&up->port.lock, flags);

	return ret;
}

static unsigned int sunsu_get_mctrl(struct uart_port *port)
{
	struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
	unsigned char status;
	unsigned int ret;

	status = serial_in(up, UART_MSR);

	ret = 0;
	if (status & UART_MSR_DCD)
		ret |= TIOCM_CAR;
	if (status & UART_MSR_RI)
		ret |= TIOCM_RNG;
	if (status & UART_MSR_DSR)
		ret |= TIOCM_DSR;
	if (status & UART_MSR_CTS)
		ret |= TIOCM_CTS;
	return ret;
}

static void sunsu_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
	struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
	unsigned char mcr = 0;

	if (mctrl & TIOCM_RTS)
		mcr |= UART_MCR_RTS;
	if (mctrl & TIOCM_DTR)
		mcr |= UART_MCR_DTR;
	if (mctrl & TIOCM_OUT1)
		mcr |= UART_MCR_OUT1;
	if (mctrl & TIOCM_OUT2)
		mcr |= UART_MCR_OUT2;
	if (mctrl & TIOCM_LOOP)
		mcr |= UART_MCR_LOOP;

	serial_out(up, UART_MCR, mcr);
}

static void sunsu_break_ctl(struct uart_port *port, int break_state)
{
	struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
	unsigned long flags;

	spin_lock_irqsave(&up->port.lock, flags);
	if (break_state == -1)
		up->lcr |= UART_LCR_SBC;
	else
		up->lcr &= ~UART_LCR_SBC;
	serial_out(up, UART_LCR, up->lcr);
	spin_unlock_irqrestore(&up->port.lock, flags);
}

static int sunsu_startup(struct uart_port *port)
{
	struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
	unsigned long flags;
	int retval;

	if (up->port.type == PORT_16C950) {
		/* Wake up and initialize UART */
		up->acr = 0;
		serial_outp(up, UART_LCR, 0xBF);
		serial_outp(up, UART_EFR, UART_EFR_ECB);
		serial_outp(up, UART_IER, 0);
		serial_outp(up, UART_LCR, 0);
		serial_icr_write(up, UART_CSR, 0); /* Reset the UART */
		serial_outp(up, UART_LCR, 0xBF);
		serial_outp(up, UART_EFR, UART_EFR_ECB);
		serial_outp(up, UART_LCR, 0);
	}

#ifdef CONFIG_SERIAL_8250_RSA
	/*
	 * If this is an RSA port, see if we can kick it up to the
	 * higher speed clock.
	 */
	enable_rsa(up);
#endif

	/*
	 * Clear the FIFO buffers and disable them.
Alexey Dobriyan's avatar
Alexey Dobriyan committed
639
	 * (they will be reenabled in set_termios())
Linus Torvalds's avatar
Linus Torvalds committed
640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660
	 */
	if (uart_config[up->port.type].flags & UART_CLEAR_FIFO) {
		serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
		serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO |
				UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
		serial_outp(up, UART_FCR, 0);
	}

	/*
	 * Clear the interrupt registers.
	 */
	(void) serial_inp(up, UART_LSR);
	(void) serial_inp(up, UART_RX);
	(void) serial_inp(up, UART_IIR);
	(void) serial_inp(up, UART_MSR);

	/*
	 * At this point, there's no way the LSR could still be 0xff;
	 * if it is, then bail out, because there's likely no UART
	 * here.
	 */
661
	if (!(up->port.flags & UPF_BUGGY_UART) &&
Linus Torvalds's avatar
Linus Torvalds committed
662 663 664 665 666 667 668
	    (serial_inp(up, UART_LSR) == 0xff)) {
		printk("ttyS%d: LSR safety check engaged!\n", up->port.line);
		return -ENODEV;
	}

	if (up->su_type != SU_PORT_PORT) {
		retval = request_irq(up->port.irq, sunsu_kbd_ms_interrupt,
669
				     IRQF_SHARED, su_typev[up->su_type], up);
Linus Torvalds's avatar
Linus Torvalds committed
670 671
	} else {
		retval = request_irq(up->port.irq, sunsu_serial_interrupt,
672
				     IRQF_SHARED, su_typev[up->su_type], up);
Linus Torvalds's avatar
Linus Torvalds committed
673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698
	}
	if (retval) {
		printk("su: Cannot register IRQ %d\n", up->port.irq);
		return retval;
	}

	/*
	 * Now, initialize the UART
	 */
	serial_outp(up, UART_LCR, UART_LCR_WLEN8);

	spin_lock_irqsave(&up->port.lock, flags);

	up->port.mctrl |= TIOCM_OUT2;

	sunsu_set_mctrl(&up->port, up->port.mctrl);
	spin_unlock_irqrestore(&up->port.lock, flags);

	/*
	 * Finally, enable interrupts.  Note: Modem status interrupts
	 * are set via set_termios(), which will be occurring imminently
	 * anyway, so we don't enable them here.
	 */
	up->ier = UART_IER_RLSI | UART_IER_RDI;
	serial_outp(up, UART_IER, up->ier);

699
	if (up->port.flags & UPF_FOURPORT) {
Linus Torvalds's avatar
Linus Torvalds committed
700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731
		unsigned int icp;
		/*
		 * Enable interrupts on the AST Fourport board
		 */
		icp = (up->port.iobase & 0xfe0) | 0x01f;
		outb_p(0x80, icp);
		(void) inb_p(icp);
	}

	/*
	 * And clear the interrupt registers again for luck.
	 */
	(void) serial_inp(up, UART_LSR);
	(void) serial_inp(up, UART_RX);
	(void) serial_inp(up, UART_IIR);
	(void) serial_inp(up, UART_MSR);

	return 0;
}

static void sunsu_shutdown(struct uart_port *port)
{
	struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
	unsigned long flags;

	/*
	 * Disable interrupts from this port
	 */
	up->ier = 0;
	serial_outp(up, UART_IER, 0);

	spin_lock_irqsave(&up->port.lock, flags);
732
	if (up->port.flags & UPF_FOURPORT) {
Linus Torvalds's avatar
Linus Torvalds committed
733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895
		/* reset interrupts on the AST Fourport board */
		inb((up->port.iobase & 0xfe0) | 0x1f);
		up->port.mctrl |= TIOCM_OUT1;
	} else
		up->port.mctrl &= ~TIOCM_OUT2;

	sunsu_set_mctrl(&up->port, up->port.mctrl);
	spin_unlock_irqrestore(&up->port.lock, flags);

	/*
	 * Disable break condition and FIFOs
	 */
	serial_out(up, UART_LCR, serial_inp(up, UART_LCR) & ~UART_LCR_SBC);
	serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO |
				  UART_FCR_CLEAR_RCVR |
				  UART_FCR_CLEAR_XMIT);
	serial_outp(up, UART_FCR, 0);

#ifdef CONFIG_SERIAL_8250_RSA
	/*
	 * Reset the RSA board back to 115kbps compat mode.
	 */
	disable_rsa(up);
#endif

	/*
	 * Read data port to reset things.
	 */
	(void) serial_in(up, UART_RX);

	free_irq(up->port.irq, up);
}

static void
sunsu_change_speed(struct uart_port *port, unsigned int cflag,
		   unsigned int iflag, unsigned int quot)
{
	struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
	unsigned char cval, fcr = 0;
	unsigned long flags;

	switch (cflag & CSIZE) {
	case CS5:
		cval = 0x00;
		break;
	case CS6:
		cval = 0x01;
		break;
	case CS7:
		cval = 0x02;
		break;
	default:
	case CS8:
		cval = 0x03;
		break;
	}

	if (cflag & CSTOPB)
		cval |= 0x04;
	if (cflag & PARENB)
		cval |= UART_LCR_PARITY;
	if (!(cflag & PARODD))
		cval |= UART_LCR_EPAR;
#ifdef CMSPAR
	if (cflag & CMSPAR)
		cval |= UART_LCR_SPAR;
#endif

	/*
	 * Work around a bug in the Oxford Semiconductor 952 rev B
	 * chip which causes it to seriously miscalculate baud rates
	 * when DLL is 0.
	 */
	if ((quot & 0xff) == 0 && up->port.type == PORT_16C950 &&
	    up->rev == 0x5201)
		quot ++;

	if (uart_config[up->port.type].flags & UART_USE_FIFO) {
		if ((up->port.uartclk / quot) < (2400 * 16))
			fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
#ifdef CONFIG_SERIAL_8250_RSA
		else if (up->port.type == PORT_RSA)
			fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_14;
#endif
		else
			fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8;
	}
	if (up->port.type == PORT_16750)
		fcr |= UART_FCR7_64BYTE;

	/*
	 * Ok, we're now changing the port state.  Do it with
	 * interrupts disabled.
	 */
	spin_lock_irqsave(&up->port.lock, flags);

	/*
	 * Update the per-port timeout.
	 */
	uart_update_timeout(port, cflag, (port->uartclk / (16 * quot)));

	up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
	if (iflag & INPCK)
		up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;
	if (iflag & (BRKINT | PARMRK))
		up->port.read_status_mask |= UART_LSR_BI;

	/*
	 * Characteres to ignore
	 */
	up->port.ignore_status_mask = 0;
	if (iflag & IGNPAR)
		up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
	if (iflag & IGNBRK) {
		up->port.ignore_status_mask |= UART_LSR_BI;
		/*
		 * If we're ignoring parity and break indicators,
		 * ignore overruns too (for real raw support).
		 */
		if (iflag & IGNPAR)
			up->port.ignore_status_mask |= UART_LSR_OE;
	}

	/*
	 * ignore all characters if CREAD is not set
	 */
	if ((cflag & CREAD) == 0)
		up->port.ignore_status_mask |= UART_LSR_DR;

	/*
	 * CTS flow control flag and modem status interrupts
	 */
	up->ier &= ~UART_IER_MSI;
	if (UART_ENABLE_MS(&up->port, cflag))
		up->ier |= UART_IER_MSI;

	serial_out(up, UART_IER, up->ier);

	if (uart_config[up->port.type].flags & UART_STARTECH) {
		serial_outp(up, UART_LCR, 0xBF);
		serial_outp(up, UART_EFR, cflag & CRTSCTS ? UART_EFR_CTS :0);
	}
	serial_outp(up, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */
	serial_outp(up, UART_DLL, quot & 0xff);		/* LS of divisor */
	serial_outp(up, UART_DLM, quot >> 8);		/* MS of divisor */
	if (up->port.type == PORT_16750)
		serial_outp(up, UART_FCR, fcr);		/* set fcr */
	serial_outp(up, UART_LCR, cval);		/* reset DLAB */
	up->lcr = cval;					/* Save LCR */
	if (up->port.type != PORT_16750) {
		if (fcr & UART_FCR_ENABLE_FIFO) {
			/* emulated UARTs (Lucent Venus 167x) need two steps */
			serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
		}
		serial_outp(up, UART_FCR, fcr);		/* set fcr */
	}

	up->cflag = cflag;

	spin_unlock_irqrestore(&up->port.lock, flags);
}

static void
Alan Cox's avatar
Alan Cox committed
896 897
sunsu_set_termios(struct uart_port *port, struct ktermios *termios,
		  struct ktermios *old)
Linus Torvalds's avatar
Linus Torvalds committed
898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030
{
	unsigned int baud, quot;

	/*
	 * Ask the core to calculate the divisor for us.
	 */
	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); 
	quot = uart_get_divisor(port, baud);

	sunsu_change_speed(port, termios->c_cflag, termios->c_iflag, quot);
}

static void sunsu_release_port(struct uart_port *port)
{
}

static int sunsu_request_port(struct uart_port *port)
{
	return 0;
}

static void sunsu_config_port(struct uart_port *port, int flags)
{
	struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;

	if (flags & UART_CONFIG_TYPE) {
		/*
		 * We are supposed to call autoconfig here, but this requires
		 * splitting all the OBP probing crap from the UART probing.
		 * We'll do it when we kill sunsu.c altogether.
		 */
		port->type = up->type_probed;	/* XXX */
	}
}

static int
sunsu_verify_port(struct uart_port *port, struct serial_struct *ser)
{
	return -EINVAL;
}

static const char *
sunsu_type(struct uart_port *port)
{
	int type = port->type;

	if (type >= ARRAY_SIZE(uart_config))
		type = 0;
	return uart_config[type].name;
}

static struct uart_ops sunsu_pops = {
	.tx_empty	= sunsu_tx_empty,
	.set_mctrl	= sunsu_set_mctrl,
	.get_mctrl	= sunsu_get_mctrl,
	.stop_tx	= sunsu_stop_tx,
	.start_tx	= sunsu_start_tx,
	.stop_rx	= sunsu_stop_rx,
	.enable_ms	= sunsu_enable_ms,
	.break_ctl	= sunsu_break_ctl,
	.startup	= sunsu_startup,
	.shutdown	= sunsu_shutdown,
	.set_termios	= sunsu_set_termios,
	.type		= sunsu_type,
	.release_port	= sunsu_release_port,
	.request_port	= sunsu_request_port,
	.config_port	= sunsu_config_port,
	.verify_port	= sunsu_verify_port,
};

#define UART_NR	4

static struct uart_sunsu_port sunsu_ports[UART_NR];

#ifdef CONFIG_SERIO

static DEFINE_SPINLOCK(sunsu_serio_lock);

static int sunsu_serio_write(struct serio *serio, unsigned char ch)
{
	struct uart_sunsu_port *up = serio->port_data;
	unsigned long flags;
	int lsr;

	spin_lock_irqsave(&sunsu_serio_lock, flags);

	do {
		lsr = serial_in(up, UART_LSR);
	} while (!(lsr & UART_LSR_THRE));

	/* Send the character out. */
	serial_out(up, UART_TX, ch);

	spin_unlock_irqrestore(&sunsu_serio_lock, flags);

	return 0;
}

static int sunsu_serio_open(struct serio *serio)
{
	struct uart_sunsu_port *up = serio->port_data;
	unsigned long flags;
	int ret;

	spin_lock_irqsave(&sunsu_serio_lock, flags);
	if (!up->serio_open) {
		up->serio_open = 1;
		ret = 0;
	} else
		ret = -EBUSY;
	spin_unlock_irqrestore(&sunsu_serio_lock, flags);

	return ret;
}

static void sunsu_serio_close(struct serio *serio)
{
	struct uart_sunsu_port *up = serio->port_data;
	unsigned long flags;

	spin_lock_irqsave(&sunsu_serio_lock, flags);
	up->serio_open = 0;
	spin_unlock_irqrestore(&sunsu_serio_lock, flags);
}

#endif /* CONFIG_SERIO */

static void sunsu_autoconfig(struct uart_sunsu_port *up)
{
	unsigned char status1, status2, scratch, scratch2, scratch3;
	unsigned char save_lcr, save_mcr;
	unsigned long flags;

1031
	if (up->su_type == SU_PORT_NONE)
Linus Torvalds's avatar
Linus Torvalds committed
1032 1033 1034
		return;

	up->type_probed = PORT_UNKNOWN;
1035
	up->port.iotype = UPIO_MEM;
Linus Torvalds's avatar
Linus Torvalds committed
1036 1037 1038

	spin_lock_irqsave(&up->port.lock, flags);

1039
	if (!(up->port.flags & UPF_BUGGY_UART)) {
Linus Torvalds's avatar
Linus Torvalds committed
1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076
		/*
		 * Do a simple existence test first; if we fail this, there's
		 * no point trying anything else.
		 *
		 * 0x80 is used as a nonsense port to prevent against false
		 * positives due to ISA bus float.  The assumption is that
		 * 0x80 is a non-existent port; which should be safe since
		 * include/asm/io.h also makes this assumption.
		 */
		scratch = serial_inp(up, UART_IER);
		serial_outp(up, UART_IER, 0);
#ifdef __i386__
		outb(0xff, 0x080);
#endif
		scratch2 = serial_inp(up, UART_IER);
		serial_outp(up, UART_IER, 0x0f);
#ifdef __i386__
		outb(0, 0x080);
#endif
		scratch3 = serial_inp(up, UART_IER);
		serial_outp(up, UART_IER, scratch);
		if (scratch2 != 0 || scratch3 != 0x0F)
			goto out;	/* We failed; there's nothing here */
	}

	save_mcr = serial_in(up, UART_MCR);
	save_lcr = serial_in(up, UART_LCR);

	/* 
	 * Check to see if a UART is really there.  Certain broken
	 * internal modems based on the Rockwell chipset fail this
	 * test, because they apparently don't implement the loopback
	 * test mode.  So this test is skipped on the COM 1 through
	 * COM 4 ports.  This *should* be safe, since no board
	 * manufacturer would be stupid enough to design a board
	 * that conflicts with COM 1-4 --- we hope!
	 */
1077
	if (!(up->port.flags & UPF_SKIP_TEST)) {
Linus Torvalds's avatar
Linus Torvalds committed
1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181
		serial_outp(up, UART_MCR, UART_MCR_LOOP | 0x0A);
		status1 = serial_inp(up, UART_MSR) & 0xF0;
		serial_outp(up, UART_MCR, save_mcr);
		if (status1 != 0x90)
			goto out;	/* We failed loopback test */
	}
	serial_outp(up, UART_LCR, 0xBF);	/* set up for StarTech test */
	serial_outp(up, UART_EFR, 0);		/* EFR is the same as FCR */
	serial_outp(up, UART_LCR, 0);
	serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
	scratch = serial_in(up, UART_IIR) >> 6;
	switch (scratch) {
		case 0:
			up->port.type = PORT_16450;
			break;
		case 1:
			up->port.type = PORT_UNKNOWN;
			break;
		case 2:
			up->port.type = PORT_16550;
			break;
		case 3:
			up->port.type = PORT_16550A;
			break;
	}
	if (up->port.type == PORT_16550A) {
		/* Check for Startech UART's */
		serial_outp(up, UART_LCR, UART_LCR_DLAB);
		if (serial_in(up, UART_EFR) == 0) {
			up->port.type = PORT_16650;
		} else {
			serial_outp(up, UART_LCR, 0xBF);
			if (serial_in(up, UART_EFR) == 0)
				up->port.type = PORT_16650V2;
		}
	}
	if (up->port.type == PORT_16550A) {
		/* Check for TI 16750 */
		serial_outp(up, UART_LCR, save_lcr | UART_LCR_DLAB);
		serial_outp(up, UART_FCR,
			    UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE);
		scratch = serial_in(up, UART_IIR) >> 5;
		if (scratch == 7) {
			/*
			 * If this is a 16750, and not a cheap UART
			 * clone, then it should only go into 64 byte
			 * mode if the UART_FCR7_64BYTE bit was set
			 * while UART_LCR_DLAB was latched.
			 */
 			serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
			serial_outp(up, UART_LCR, 0);
			serial_outp(up, UART_FCR,
				    UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE);
			scratch = serial_in(up, UART_IIR) >> 5;
			if (scratch == 6)
				up->port.type = PORT_16750;
		}
		serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
	}
	serial_outp(up, UART_LCR, save_lcr);
	if (up->port.type == PORT_16450) {
		scratch = serial_in(up, UART_SCR);
		serial_outp(up, UART_SCR, 0xa5);
		status1 = serial_in(up, UART_SCR);
		serial_outp(up, UART_SCR, 0x5a);
		status2 = serial_in(up, UART_SCR);
		serial_outp(up, UART_SCR, scratch);

		if ((status1 != 0xa5) || (status2 != 0x5a))
			up->port.type = PORT_8250;
	}

	up->port.fifosize = uart_config[up->port.type].dfl_xmit_fifo_size;

	if (up->port.type == PORT_UNKNOWN)
		goto out;
	up->type_probed = up->port.type;	/* XXX */

	/*
	 * Reset the UART.
	 */
#ifdef CONFIG_SERIAL_8250_RSA
	if (up->port.type == PORT_RSA)
		serial_outp(up, UART_RSA_FRR, 0);
#endif
	serial_outp(up, UART_MCR, save_mcr);
	serial_outp(up, UART_FCR, (UART_FCR_ENABLE_FIFO |
				     UART_FCR_CLEAR_RCVR |
				     UART_FCR_CLEAR_XMIT));
	serial_outp(up, UART_FCR, 0);
	(void)serial_in(up, UART_RX);
	serial_outp(up, UART_IER, 0);

out:
	spin_unlock_irqrestore(&up->port.lock, flags);
}

static struct uart_driver sunsu_reg = {
	.owner			= THIS_MODULE,
	.driver_name		= "serial",
	.dev_name		= "ttyS",
	.major			= TTY_MAJOR,
};

1182
static int __init sunsu_kbd_ms_init(struct uart_sunsu_port *up)
Linus Torvalds's avatar
Linus Torvalds committed
1183
{
1184
	int quot, baud;
Linus Torvalds's avatar
Linus Torvalds committed
1185 1186 1187 1188
#ifdef CONFIG_SERIO
	struct serio *serio;
#endif

1189
	if (up->su_type == SU_PORT_KBD) {
Linus Torvalds's avatar
Linus Torvalds committed
1190
		up->cflag = B1200 | CS8 | CLOCAL | CREAD;
1191 1192
		baud = 1200;
	} else {
Linus Torvalds's avatar
Linus Torvalds committed
1193
		up->cflag = B4800 | CS8 | CLOCAL | CREAD;
1194 1195 1196
		baud = 4800;
	}
	quot = up->port.uartclk / (16 * baud);
Linus Torvalds's avatar
Linus Torvalds committed
1197 1198 1199

	sunsu_autoconfig(up);
	if (up->port.type == PORT_UNKNOWN)
1200
		return -ENODEV;
Linus Torvalds's avatar
Linus Torvalds committed
1201

1202 1203 1204 1205 1206
	printk("%s: %s port at %lx, irq %u\n",
	       to_of_device(up->port.dev)->node->full_name,
	       (up->su_type == SU_PORT_KBD) ? "Keyboard" : "Mouse",
	       up->port.mapbase, up->port.irq);

Linus Torvalds's avatar
Linus Torvalds committed
1207
#ifdef CONFIG_SERIO
1208 1209
	serio = &up->serio;
	serio->port_data = up;
Linus Torvalds's avatar
Linus Torvalds committed
1210

1211 1212 1213 1214
	serio->id.type = SERIO_RS232;
	if (up->su_type == SU_PORT_KBD) {
		serio->id.proto = SERIO_SUNKBD;
		strlcpy(serio->name, "sukbd", sizeof(serio->name));
Linus Torvalds's avatar
Linus Torvalds committed
1215
	} else {
1216 1217 1218
		serio->id.proto = SERIO_SUN;
		serio->id.extra = 1;
		strlcpy(serio->name, "sums", sizeof(serio->name));
Linus Torvalds's avatar
Linus Torvalds committed
1219
	}
1220 1221 1222 1223 1224 1225 1226 1227 1228 1229
	strlcpy(serio->phys,
		(!(up->port.line & 1) ? "su/serio0" : "su/serio1"),
		sizeof(serio->phys));

	serio->write = sunsu_serio_write;
	serio->open = sunsu_serio_open;
	serio->close = sunsu_serio_close;
	serio->dev.parent = up->port.dev;

	serio_register_port(serio);
Linus Torvalds's avatar
Linus Torvalds committed
1230 1231
#endif

1232 1233
	sunsu_change_speed(&up->port, up->cflag, 0, quot);

Linus Torvalds's avatar
Linus Torvalds committed
1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267
	sunsu_startup(&up->port);
	return 0;
}

/*
 * ------------------------------------------------------------
 * Serial console driver
 * ------------------------------------------------------------
 */

#ifdef CONFIG_SERIAL_SUNSU_CONSOLE

#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)

/*
 *	Wait for transmitter & holding register to empty
 */
static __inline__ void wait_for_xmitr(struct uart_sunsu_port *up)
{
	unsigned int status, tmout = 10000;

	/* Wait up to 10ms for the character(s) to be sent. */
	do {
		status = serial_in(up, UART_LSR);

		if (status & UART_LSR_BI)
			up->lsr_break_flag = UART_LSR_BI;

		if (--tmout == 0)
			break;
		udelay(1);
	} while ((status & BOTH_EMPTY) != BOTH_EMPTY);

	/* Wait up to 1s for flow control if necessary */
1268
	if (up->port.flags & UPF_CONS_FLOW) {
Linus Torvalds's avatar
Linus Torvalds committed
1269 1270 1271 1272 1273 1274 1275
		tmout = 1000000;
		while (--tmout &&
		       ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0))
			udelay(1);
	}
}

1276 1277 1278 1279 1280 1281 1282 1283
static void sunsu_console_putchar(struct uart_port *port, int ch)
{
	struct uart_sunsu_port *up = (struct uart_sunsu_port *)port;

	wait_for_xmitr(up);
	serial_out(up, UART_TX, ch);
}

Linus Torvalds's avatar
Linus Torvalds committed
1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299
/*
 *	Print a string to the serial port trying not to disturb
 *	any possible real use of the port...
 */
static void sunsu_console_write(struct console *co, const char *s,
				unsigned int count)
{
	struct uart_sunsu_port *up = &sunsu_ports[co->index];
	unsigned int ier;

	/*
	 *	First save the UER then disable the interrupts
	 */
	ier = serial_in(up, UART_IER);
	serial_out(up, UART_IER, 0);

1300
	uart_console_write(&up->port, s, count, sunsu_console_putchar);
Linus Torvalds's avatar
Linus Torvalds committed
1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315

	/*
	 *	Finally, wait for transmitter to become empty
	 *	and restore the IER
	 */
	wait_for_xmitr(up);
	serial_out(up, UART_IER, ier);
}

/*
 *	Setup initial baud/bits/parity. We do two things here:
 *	- construct a cflag setting for the first su_open()
 *	- initialize the serial port
 *	Return non-zero if we didn't find a serial port.
 */
1316
static int sunsu_console_setup(struct console *co, char *options)
Linus Torvalds's avatar
Linus Torvalds committed
1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360
{
	struct uart_port *port;
	int baud = 9600;
	int bits = 8;
	int parity = 'n';
	int flow = 'n';

	printk("Console: ttyS%d (SU)\n",
	       (sunsu_reg.minor - 64) + co->index);

	/*
	 * Check whether an invalid uart number has been specified, and
	 * if so, search for the first available port that does have
	 * console support.
	 */
	if (co->index >= UART_NR)
		co->index = 0;
	port = &sunsu_ports[co->index].port;

	/*
	 * Temporary fix.
	 */
	spin_lock_init(&port->lock);

	if (options)
		uart_parse_options(options, &baud, &parity, &bits, &flow);

	return uart_set_options(port, co, baud, parity, bits, flow);
}

static struct console sunsu_cons = {
	.name	=	"ttyS",
	.write	=	sunsu_console_write,
	.device	=	uart_console_device,
	.setup	=	sunsu_console_setup,
	.flags	=	CON_PRINTBUFFER,
	.index	=	-1,
	.data	=	&sunsu_reg,
};

/*
 *	Register console.
 */

1361
static inline struct console *SUNSU_CONSOLE(int num_uart)
Linus Torvalds's avatar
Linus Torvalds committed
1362 1363 1364 1365
{
	int i;

	if (con_is_present())
1366
		return NULL;
Linus Torvalds's avatar
Linus Torvalds committed
1367

1368
	for (i = 0; i < num_uart; i++) {
Linus Torvalds's avatar
Linus Torvalds committed
1369 1370 1371 1372 1373
		int this_minor = sunsu_reg.minor + i;

		if ((this_minor - 64) == (serial_console - 1))
			break;
	}
1374
	if (i == num_uart)
1375
		return NULL;
Linus Torvalds's avatar
Linus Torvalds committed
1376 1377

	sunsu_cons.index = i;
1378 1379

	return &sunsu_cons;
Linus Torvalds's avatar
Linus Torvalds committed
1380 1381
}
#else
1382
#define SUNSU_CONSOLE(num_uart)		(NULL)
Linus Torvalds's avatar
Linus Torvalds committed
1383 1384 1385
#define sunsu_serial_console_init()	do { } while (0)
#endif

1386
static enum su_type __devinit su_get_type(struct device_node *dp)
Linus Torvalds's avatar
Linus Torvalds committed
1387
{
1388
	struct device_node *ap = of_find_node_by_path("/aliases");
Linus Torvalds's avatar
Linus Torvalds committed
1389

1390 1391 1392
	if (ap) {
		char *keyb = of_get_property(ap, "keyboard", NULL);
		char *ms = of_get_property(ap, "mouse", NULL);
Linus Torvalds's avatar
Linus Torvalds committed
1393

1394 1395 1396 1397 1398 1399 1400 1401 1402
		if (keyb) {
			if (dp == of_find_node_by_path(keyb))
				return SU_PORT_KBD;
		}
		if (ms) {
			if (dp == of_find_node_by_path(ms))
				return SU_PORT_MS;
		}
	}
Linus Torvalds's avatar
Linus Torvalds committed
1403

1404 1405
	return SU_PORT_PORT;
}
Linus Torvalds's avatar
Linus Torvalds committed
1406

1407 1408 1409 1410 1411 1412
static int __devinit su_probe(struct of_device *op, const struct of_device_id *match)
{
	static int inst;
	struct device_node *dp = op->node;
	struct uart_sunsu_port *up;
	struct resource *rp;
1413
	enum su_type type;
1414
	int err;
Linus Torvalds's avatar
Linus Torvalds committed
1415

1416 1417 1418 1419 1420 1421 1422 1423 1424 1425
	type = su_get_type(dp);
	if (type == SU_PORT_PORT) {
		if (inst >= UART_NR)
			return -EINVAL;
		up = &sunsu_ports[inst];
	} else {
		up = kzalloc(sizeof(*up), GFP_KERNEL);
		if (!up)
			return -ENOMEM;
	}
Linus Torvalds's avatar
Linus Torvalds committed
1426

1427
	up->port.line = inst;
Linus Torvalds's avatar
Linus Torvalds committed
1428

1429
	spin_lock_init(&up->port.lock);
Linus Torvalds's avatar
Linus Torvalds committed
1430

1431
	up->su_type = type;
1432

1433
	rp = &op->resource[0];
1434
	up->port.mapbase = rp->start;
1435 1436
	up->reg_size = (rp->end - rp->start) + 1;
	up->port.membase = of_ioremap(rp, 0, up->reg_size, "su");
1437 1438 1439
	if (!up->port.membase) {
		if (type != SU_PORT_PORT)
			kfree(up);
1440
		return -ENOMEM;
1441
	}
1442

1443
	up->port.irq = op->irqs[0];
Linus Torvalds's avatar
Linus Torvalds committed
1444

1445
	up->port.dev = &op->dev;
Linus Torvalds's avatar
Linus Torvalds committed
1446

1447 1448
	up->port.type = PORT_UNKNOWN;
	up->port.uartclk = (SU_BASE_BAUD * 16);
Linus Torvalds's avatar
Linus Torvalds committed
1449

1450 1451 1452
	err = 0;
	if (up->su_type == SU_PORT_KBD || up->su_type == SU_PORT_MS) {
		err = sunsu_kbd_ms_init(up);
1453 1454
		if (err) {
			kfree(up);
1455
			goto out_unmap;
1456 1457
		}
		dev_set_drvdata(&op->dev, up);
1458 1459

		return 0;
Linus Torvalds's avatar
Linus Torvalds committed
1460 1461
	}

1462
	up->port.flags |= UPF_BOOT_AUTOCONF;
Linus Torvalds's avatar
Linus Torvalds committed
1463

1464
	sunsu_autoconfig(up);
Linus Torvalds's avatar
Linus Torvalds committed
1465

1466 1467 1468
	err = -ENODEV;
	if (up->port.type == PORT_UNKNOWN)
		goto out_unmap;
Linus Torvalds's avatar
Linus Torvalds committed
1469

1470
	up->port.ops = &sunsu_pops;
Linus Torvalds's avatar
Linus Torvalds committed
1471

1472 1473 1474
	err = uart_add_one_port(&sunsu_reg, &up->port);
	if (err)
		goto out_unmap;
Linus Torvalds's avatar
Linus Torvalds committed
1475

1476
	dev_set_drvdata(&op->dev, up);
Linus Torvalds's avatar
Linus Torvalds committed
1477

1478
	inst++;
Linus Torvalds's avatar
Linus Torvalds committed
1479

1480 1481 1482
	return 0;

out_unmap:
1483
	of_iounmap(&op->resource[0], up->port.membase, up->reg_size);
1484
	return err;
Linus Torvalds's avatar
Linus Torvalds committed
1485 1486
}

1487
static int __devexit su_remove(struct of_device *op)
Linus Torvalds's avatar
Linus Torvalds committed
1488
{
1489
	struct uart_sunsu_port *up = dev_get_drvdata(&op->dev);
Linus Torvalds's avatar
Linus Torvalds committed
1490

1491 1492 1493 1494 1495
	if (up->su_type == SU_PORT_MS ||
	    up->su_type == SU_PORT_KBD) {
#ifdef CONFIG_SERIO
		serio_unregister_port(&up->serio);
#endif
1496 1497
		kfree(up);
	} else if (up->port.type != PORT_UNKNOWN) {
1498
		uart_remove_one_port(&sunsu_reg, &up->port);
1499 1500
	}

1501
	if (up->port.membase)
1502
		of_iounmap(&op->resource[0], up->port.membase, up->reg_size);
1503

1504
	dev_set_drvdata(&op->dev, NULL);
Linus Torvalds's avatar
Linus Torvalds committed
1505

1506 1507
	return 0;
}
Linus Torvalds's avatar
Linus Torvalds committed
1508

1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522
static struct of_device_id su_match[] = {
	{
		.name = "su",
	},
	{
		.name = "su_pnp",
	},
	{
		.name = "serial",
		.compatible = "su",
	},
	{},
};
MODULE_DEVICE_TABLE(of, su_match);
Linus Torvalds's avatar
Linus Torvalds committed
1523