aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/serial/netx-serial.c
blob: 9f8ccb735c19c7bfac58c991ae1235b9b377548c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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
42
43
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
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
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
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
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
312
313
314
315
316
317
318
319
320
321
322
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
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
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
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
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
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
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
699
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
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
/*
 * drivers/serial/netx-serial.c
 *
 * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

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

#include <linux/device.h>
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/console.h>
#include <linux/sysrq.h>
#include <linux/platform_device.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial_core.h>
#include <linux/serial.h>

#include <asm/io.h>
#include <asm/irq.h>
#include <asm/hardware.h>
#include <asm/arch/netx-regs.h>

/* We've been assigned a range on the "Low-density serial ports" major */
#define SERIAL_NX_MAJOR	204
#define MINOR_START	170

#ifdef CONFIG_SERIAL_NETX_CONSOLE

enum uart_regs {
	UART_DR              = 0x00,
	UART_SR              = 0x04,
	UART_LINE_CR         = 0x08,
	UART_BAUDDIV_MSB     = 0x0c,
	UART_BAUDDIV_LSB     = 0x10,
	UART_CR              = 0x14,
	UART_FR              = 0x18,
	UART_IIR             = 0x1c,
	UART_ILPR            = 0x20,
	UART_RTS_CR          = 0x24,
	UART_RTS_LEAD        = 0x28,
	UART_RTS_TRAIL       = 0x2c,
	UART_DRV_ENABLE      = 0x30,
	UART_BRM_CR          = 0x34,
	UART_RXFIFO_IRQLEVEL = 0x38,
	UART_TXFIFO_IRQLEVEL = 0x3c,
};

#define SR_FE (1<<0)
#define SR_PE (1<<1)
#define SR_BE (1<<2)
#define SR_OE (1<<3)

#define LINE_CR_BRK       (1<<0)
#define LINE_CR_PEN       (1<<1)
#define LINE_CR_EPS       (1<<2)
#define LINE_CR_STP2      (1<<3)
#define LINE_CR_FEN       (1<<4)
#define LINE_CR_5BIT      (0<<5)
#define LINE_CR_6BIT      (1<<5)
#define LINE_CR_7BIT      (2<<5)
#define LINE_CR_8BIT      (3<<5)
#define LINE_CR_BITS_MASK (3<<5)

#define CR_UART_EN (1<<0)
#define CR_SIREN   (1<<1)
#define CR_SIRLP   (1<<2)
#define CR_MSIE    (1<<3)
#define CR_RIE     (1<<4)
#define CR_TIE     (1<<5)
#define CR_RTIE    (1<<6)
#define CR_LBE     (1<<7)

#define FR_CTS  (1<<0)
#define FR_DSR  (1<<1)
#define FR_DCD  (1<<2)
#define FR_BUSY (1<<3)
#define FR_RXFE (1<<4)
#define FR_TXFF (1<<5)
#define FR_RXFF (1<<6)
#define FR_TXFE (1<<7)

#define IIR_MIS (1<<0)
#define IIR_RIS (1<<1)
#define IIR_TIS (1<<2)
#define IIR_RTIS (1<<3)
#define IIR_MASK 0xf

#define RTS_CR_AUTO (1<<0)
#define RTS_CR_RTS  (1<<1)
#define RTS_CR_COUNT (1<<2)
#define RTS_CR_MOD2  (1<<3)
#define RTS_CR_RTS_POL (1<<4)
#define RTS_CR_CTS_CTR (1<<5)
#define RTS_CR_CTS_POL (1<<6)
#define RTS_CR_STICK   (1<<7)

#define UART_PORT_SIZE 0x40
#define DRIVER_NAME "netx-uart"

struct netx_port {
	struct uart_port	port;
};

static void netx_stop_tx(struct uart_port *port)
{
	unsigned int val;
	val = readl(port->membase + UART_CR);
	writel(val & ~CR_TIE,  port->membase + UART_CR);
}

static void netx_stop_rx(struct uart_port *port)
{
	unsigned int val;
	val = readl(port->membase + UART_CR);
	writel(val & ~CR_RIE,  port->membase + UART_CR);
}

static void netx_enable_ms(struct uart_port *port)
{
	unsigned int val;
	val = readl(port->membase + UART_CR);
	writel(val | CR_MSIE, port->membase + UART_CR);
}

static inline void netx_transmit_buffer(struct uart_port *port)
{
	struct circ_buf *xmit = &port->info->xmit;

	if (port->x_char) {
		writel(port->x_char, port->membase + UART_DR);
		port->icount.tx++;
		port->x_char = 0;
		return;
	}

	if (uart_tx_stopped(port) || uart_circ_empty(xmit)) {
		netx_stop_tx(port);
		return;
	}

	do {
		/* send xmit->buf[xmit->tail]
		 * out the port here */
		writel(xmit->buf[xmit->tail], port->membase + UART_DR);
		xmit->tail = (xmit->tail + 1) &
		         (UART_XMIT_SIZE - 1);
		port->icount.tx++;
		if (uart_circ_empty(xmit))
			break;
	} while (!(readl(port->membase + UART_FR) & FR_TXFF));

	if (uart_circ_empty(xmit))
		netx_stop_tx(port);
}

static void netx_start_tx(struct uart_port *port)
{
	writel(
	    readl(port->membase + UART_CR) | CR_TIE, port->membase + UART_CR);

	if (!(readl(port->membase + UART_FR) & FR_TXFF))
		netx_transmit_buffer(port);
}

static unsigned int netx_tx_empty(struct uart_port *port)
{
	return readl(port->membase + UART_FR) & FR_BUSY ? 0 : TIOCSER_TEMT;
}

static void netx_txint(struct uart_port *port)
{
	struct circ_buf *xmit = &port->info->xmit;

	if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
		netx_stop_tx(port);
		return;
	}

	netx_transmit_buffer(port);

	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
		uart_write_wakeup(port);
}

static void netx_rxint(struct uart_port *port)
{
	unsigned char rx, flg, status;
	struct tty_struct *tty = port->info->port.tty;

	while (!(readl(port->membase + UART_FR) & FR_RXFE)) {
		rx = readl(port->membase + UART_DR);
		flg = TTY_NORMAL;
		port->icount.rx++;
		status = readl(port->membase + UART_SR);
		if (status & SR_BE) {
			writel(0, port->membase + UART_SR);
			if (uart_handle_break(port))
				continue;
		}

		if (unlikely(status & (SR_FE | SR_PE | SR_OE))) {

			if (status & SR_PE)
				port->icount.parity++;
			else if (status & SR_FE)
				port->icount.frame++;
			if (status & SR_OE)
				port->icount.overrun++;

			status &= port->read_status_mask;

			if (status & SR_BE)
				flg = TTY_BREAK;
			else if (status & SR_PE)
				flg = TTY_PARITY;
			else if (status & SR_FE)
				flg = TTY_FRAME;
		}

		if (uart_handle_sysrq_char(port, rx))
			continue;

		uart_insert_char(port, status, SR_OE, rx, flg);
	}

	tty_flip_buffer_push(tty);
	return;
}

static irqreturn_t netx_int(int irq, void *dev_id)
{
	struct uart_port *port = dev_id;
	unsigned long flags;
	unsigned char status;

	spin_lock_irqsave(&port->lock,flags);

	status = readl(port->membase + UART_IIR) & IIR_MASK;
	while (status) {
		if (status & IIR_RIS)
			netx_rxint(port);
		if (status & IIR_TIS)
			netx_txint(port);
		if (status & IIR_MIS) {
			if (readl(port->membase + UART_FR) & FR_CTS)
				uart_handle_cts_change(port, 1);
			else
				uart_handle_cts_change(port, 0);
		}
		writel(0, port->membase + UART_IIR);
		status = readl(port->membase + UART_IIR) & IIR_MASK;
	}

	spin_unlock_irqrestore(&port->lock,flags);
	return IRQ_HANDLED;
}

static unsigned int netx_get_mctrl(struct uart_port *port)
{
	unsigned int ret = TIOCM_DSR | TIOCM_CAR;

	if (readl(port->membase + UART_FR) & FR_CTS)
		ret |= TIOCM_CTS;

	return ret;
}

static void netx_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
	unsigned int val;

	/* FIXME: Locking needed ? */
	if (mctrl & TIOCM_RTS) {
		val = readl(port->membase + UART_RTS_CR);
		writel(val | RTS_CR_RTS, port->membase + UART_RTS_CR);
	}
}

static void netx_break_ctl(struct uart_port *port, int break_state)
{
	unsigned int line_cr;
	spin_lock_irq(&port->lock);

	line_cr = readl(port->membase + UART_LINE_CR);
	if (break_state != 0)
		line_cr |= LINE_CR_BRK;
	else
		line_cr &= ~LINE_CR_BRK;
	writel(line_cr, port->membase + UART_LINE_CR);

	spin_unlock_irq(&port->lock);
}

static int netx_startup(struct uart_port *port)
{
	int ret;

	ret = request_irq(port->irq, netx_int, 0,
			     DRIVER_NAME, port);
	if (ret) {
		dev_err(port->dev, "unable to grab irq%d\n",port->irq);
		goto exit;
	}

	writel(readl(port->membase + UART_LINE_CR) | LINE_CR_FEN,
		port->membase + UART_LINE_CR);

	writel(CR_MSIE | CR_RIE | CR_TIE | CR_RTIE | CR_UART_EN,
		port->membase + UART_CR);

exit:
	return ret;
}

static void netx_shutdown(struct uart_port *port)
{
	writel(0, port->membase + UART_CR) ;

	free_irq(port->irq, port);
}

static void
netx_set_termios(struct uart_port *port, struct ktermios *termios,
		   struct ktermios *old)
{
	unsigned int baud, quot;
	unsigned char old_cr;
	unsigned char line_cr = LINE_CR_FEN;
	unsigned char rts_cr = 0;

	switch (termios->c_cflag & CSIZE) {
	case CS5:
		line_cr |= LINE_CR_5BIT;
		break;
	case CS6:
		line_cr |= LINE_CR_6BIT;
		break;
	case CS7:
		line_cr |= LINE_CR_7BIT;
		break;
	case CS8:
		line_cr |= LINE_CR_8BIT;
		break;
	}

	if (termios->c_cflag & CSTOPB)
		line_cr |= LINE_CR_STP2;

	if (termios->c_cflag & PARENB) {
		line_cr |= LINE_CR_PEN;
		if (!(termios->c_cflag & PARODD))
			line_cr |= LINE_CR_EPS;
	}

	if (termios->c_cflag & CRTSCTS)
		rts_cr = RTS_CR_AUTO | RTS_CR_CTS_CTR | RTS_CR_RTS_POL;

	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
	quot = baud * 4096;
	quot /= 1000;
	quot *= 256;
	quot /= 100000;

	spin_lock_irq(&port->lock);

	uart_update_timeout(port, termios->c_cflag, baud);

	old_cr = readl(port->membase + UART_CR);

	/* disable interrupts */
	writel(old_cr & ~(CR_MSIE | CR_RIE | CR_TIE | CR_RTIE),
		port->membase + UART_CR);

	/* drain transmitter */
	while (readl(port->membase + UART_FR) & FR_BUSY);

	/* disable UART */
	writel(old_cr & ~CR_UART_EN, port->membase + UART_CR);

	/* modem status interrupts */
	old_cr &= ~CR_MSIE;
	if (UART_ENABLE_MS(port, termios->c_cflag))
		old_cr |= CR_MSIE;

	writel((quot>>8) & 0xff, port->membase + UART_BAUDDIV_MSB);
	writel(quot & 0xff, port->membase + UART_BAUDDIV_LSB);
	writel(line_cr, port->membase + UART_LINE_CR);

	writel(rts_cr, port->membase + UART_RTS_CR);

	/*
	 * Characters to ignore
	 */
	port->ignore_status_mask = 0;
	if (termios->c_iflag & IGNPAR)
		port->ignore_status_mask |= SR_PE;
	if (termios->c_iflag & IGNBRK) {
		port->ignore_status_mask |= SR_BE;
		/*
		 * If we're ignoring parity and break indicators,
		 * ignore overruns too (for real raw support).
		 */
		if (termios->c_iflag & IGNPAR)
			port->ignore_status_mask |= SR_PE;
	}

	port->read_status_mask = 0;
	if (termios->c_iflag & (BRKINT | PARMRK))
		port->read_status_mask |= SR_BE;
	if (termios->c_iflag & INPCK)
		port->read_status_mask |= SR_PE | SR_FE;

	writel(old_cr, port->membase + UART_CR);

	spin_unlock_irq(&port->lock);
}

static const char *netx_type(struct uart_port *port)
{
	return port->type == PORT_NETX ? "NETX" : NULL;
}

static void netx_release_port(struct uart_port *port)
{
	release_mem_region(port->mapbase, UART_PORT_SIZE);
}

static int netx_request_port(struct uart_port *port)
{
	return request_mem_region(port->mapbase, UART_PORT_SIZE,
			DRIVER_NAME) != NULL ? 0 : -EBUSY;
}

static void netx_config_port(struct uart_port *port, int flags)
{
	if (flags & UART_CONFIG_TYPE && netx_request_port(port) == 0)
		port->type = PORT_NETX;
}

static int
netx_verify_port(struct uart_port *port, struct serial_struct *ser)
{
	int ret = 0;

	if (ser->type != PORT_UNKNOWN && ser->type != PORT_NETX)
		ret = -EINVAL;

	return ret;
}

static struct uart_ops netx_pops = {
	.tx_empty	= netx_tx_empty,
	.set_mctrl	= netx_set_mctrl,
	.get_mctrl	= netx_get_mctrl,
	.stop_tx	= netx_stop_tx,
	.start_tx	= netx_start_tx,
	.stop_rx	= netx_stop_rx,
	.enable_ms	= netx_enable_ms,
	.break_ctl	= netx_break_ctl,
	.startup	= netx_startup,
	.shutdown	= netx_shutdown,
	.set_termios	= netx_set_termios,
	.type		= netx_type,
	.release_port	= netx_release_port,
	.request_port	= netx_request_port,
	.config_port	= netx_config_port,
	.verify_port	= netx_verify_port,
};

static struct netx_port netx_ports[] = {
	{
	.port = {
		.type = PORT_NETX,
		.iotype = UPIO_MEM,
		.membase = (char __iomem *)io_p2v(NETX_PA_UART0),
		.mapbase = NETX_PA_UART0,
		.irq = NETX_IRQ_UART0,
		.uartclk = 100000000,
		.fifosize = 16,
		.flags = UPF_BOOT_AUTOCONF,
		.ops = &netx_pops,
		.line = 0,
	},
	}, {
	.port = {
		.type = PORT_NETX,
		.iotype = UPIO_MEM,
		.membase = (char __iomem *)io_p2v(NETX_PA_UART1),
		.mapbase = NETX_PA_UART1,
		.irq = NETX_IRQ_UART1,
		.uartclk = 100000000,
		.fifosize = 16,
		.flags = UPF_BOOT_AUTOCONF,
		.ops = &netx_pops,
		.line = 1,
	},
	}, {
	.port = {
		.type = PORT_NETX,
		.iotype = UPIO_MEM,
		.membase = (char __iomem *)io_p2v(NETX_PA_UART2),
		.mapbase = NETX_PA_UART2,
		.irq = NETX_IRQ_UART2,
		.uartclk = 100000000,
		.fifosize = 16,
		.flags = UPF_BOOT_AUTOCONF,
		.ops = &netx_pops,
		.line = 2,
	},
	}
};

static void netx_console_putchar(struct uart_port *port, int ch)
{
	while (readl(port->membase + UART_FR) & FR_BUSY);
	writel(ch, port->membase + UART_DR);
}

static void
netx_console_write(struct console *co, const char *s, unsigned int count)
{
	struct uart_port *port = &netx_ports[co->index].port;
	unsigned char cr_save;

	cr_save = readl(port->membase + UART_CR);
	writel(cr_save | CR_UART_EN, port->membase + UART_CR);

	uart_console_write(port, s, count, netx_console_putchar);

	while (readl(port->membase + UART_FR) & FR_BUSY);
	writel(cr_save, port->membase + UART_CR);
}

static void __init
netx_console_get_options(struct uart_port *port, int *baud,
			int *parity, int *bits, int *flow)
{
	unsigned char line_cr;

	*baud = (readl(port->membase + UART_BAUDDIV_MSB) << 8) |
		readl(port->membase + UART_BAUDDIV_LSB);
	*baud *= 1000;
	*baud /= 4096;
	*baud *= 1000;
	*baud /= 256;
	*baud *= 100;

	line_cr = readl(port->membase + UART_LINE_CR);
	*parity = 'n';
	if (line_cr & LINE_CR_PEN) {
		if (line_cr & LINE_CR_EPS)
			*parity = 'e';
		else
			*parity = 'o';
	}

	switch (line_cr & LINE_CR_BITS_MASK) {
	case LINE_CR_8BIT:
		*bits = 8;
		break;
	case LINE_CR_7BIT:
		*bits = 7;
		break;
	case LINE_CR_6BIT:
		*bits = 6;
		break;
	case LINE_CR_5BIT:
		*bits = 5;
		break;
	}

	if (readl(port->membase + UART_RTS_CR) & RTS_CR_AUTO)
		*flow = 'r';
}

static int __init
netx_console_setup(struct console *co, char *options)
{
	struct netx_port *sport;
	int baud = 9600;
	int bits = 8;
	int parity = 'n';
	int flow = 'n';

	/*
	 * 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 == -1 || co->index >= ARRAY_SIZE(netx_ports))
		co->index = 0;
	sport = &netx_ports[co->index];

	if (options) {
		uart_parse_options(options, &baud, &parity, &bits, &flow);
	} else {
		/* if the UART is enabled, assume it has been correctly setup
		 * by the bootloader and get the options
		 */
		if (readl(sport->port.membase + UART_CR) & CR_UART_EN) {
			netx_console_get_options(&sport->port, &baud,
			&parity, &bits, &flow);
		}

	}

	return uart_set_options(&sport->port, co, baud, parity, bits, flow);
}

static struct uart_driver netx_reg;
static struct console netx_console = {
	.name		= "ttyNX",
	.write		= netx_console_write,
	.device		= uart_console_device,
	.setup		= netx_console_setup,
	.flags		= CON_PRINTBUFFER,
	.index		= -1,
	.data		= &netx_reg,
};

static int __init netx_console_init(void)
{
	register_console(&netx_console);
	return 0;
}
console_initcall(netx_console_init);

#define NETX_CONSOLE	&netx_console
#else
#define NETX_CONSOLE	NULL
#endif

static struct uart_driver netx_reg = {
	.owner          = THIS_MODULE,
	.driver_name    = DRIVER_NAME,
	.dev_name       = "ttyNX",
	.major          = SERIAL_NX_MAJOR,
	.minor          = MINOR_START,
	.nr             = ARRAY_SIZE(netx_ports),
	.cons           = NETX_CONSOLE,
};

static int serial_netx_suspend(struct platform_device *pdev, pm_message_t state)
{
	struct netx_port *sport = platform_get_drvdata(pdev);

	if (sport)
		uart_suspend_port(&netx_reg, &sport->port);

	return 0;
}

static int serial_netx_resume(struct platform_device *pdev)
{
	struct netx_port *sport = platform_get_drvdata(pdev);

	if (sport)
		uart_resume_port(&netx_reg, &sport->port);

	return 0;
}

static int serial_netx_probe(struct platform_device *pdev)
{
	struct uart_port *port = &netx_ports[pdev->id].port;

	dev_info(&pdev->dev, "initialising\n");

	port->dev = &pdev->dev;

	writel(1, port->membase + UART_RXFIFO_IRQLEVEL);
	uart_add_one_port(&netx_reg, &netx_ports[pdev->id].port);
	platform_set_drvdata(pdev, &netx_ports[pdev->id]);

	return 0;
}

static int serial_netx_remove(struct platform_device *pdev)
{
	struct netx_port *sport = platform_get_drvdata(pdev);

	platform_set_drvdata(pdev, NULL);

	if (sport)
		uart_remove_one_port(&netx_reg, &sport->port);

	return 0;
}

static struct platform_driver serial_netx_driver = {
	.probe          = serial_netx_probe,
	.remove         = serial_netx_remove,

	.suspend	= serial_netx_suspend,
	.resume		= serial_netx_resume,

	.driver		= {
		.name   = DRIVER_NAME,
		.owner	= THIS_MODULE,
	},
};

static int __init netx_serial_init(void)
{
	int ret;

	printk(KERN_INFO "Serial: NetX driver\n");

	ret = uart_register_driver(&netx_reg);
	if (ret)
		return ret;

	ret = platform_driver_register(&serial_netx_driver);
	if (ret != 0)
		uart_unregister_driver(&netx_reg);

	return 0;
}

static void __exit netx_serial_exit(void)
{
	platform_driver_unregister(&serial_netx_driver);
	uart_unregister_driver(&netx_reg);
}

module_init(netx_serial_init);
module_exit(netx_serial_exit);

MODULE_AUTHOR("Sascha Hauer");
MODULE_DESCRIPTION("NetX serial port driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRIVER_NAME);