[people/ms/u-boot.git] / common / serial.c

/*
 * (C) Copyright 2004
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * 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
 */

#include <common.h>
#include <serial.h>
#include <stdio_dev.h>
#include <post.h>
#include <linux/compiler.h>

DECLARE_GLOBAL_DATA_PTR;

static struct serial_device *serial_devices;
static struct serial_device *serial_current;

static void serial_null(void)
{
}

#define serial_initfunc(name)					\
	void name(void)						\
		__attribute__((weak, alias("serial_null")));

serial_initfunc(mpc8xx_serial_initialize);

void serial_register(struct serial_device *dev)
{
#ifdef CONFIG_NEEDS_MANUAL_RELOC
	dev->start += gd->reloc_off;
	dev->setbrg += gd->reloc_off;
	dev->getc += gd->reloc_off;
	dev->tstc += gd->reloc_off;
	dev->putc += gd->reloc_off;
	dev->puts += gd->reloc_off;
#endif

	dev->next = serial_devices;
	serial_devices = dev;
}

void serial_initialize(void)
{
	mpc8xx_serial_initialize();
#if defined(CONFIG_SYS_NS16550_SERIAL)
#if defined(CONFIG_SYS_NS16550_COM1)
	serial_register(&eserial1_device);
#endif
#if defined(CONFIG_SYS_NS16550_COM2)
	serial_register(&eserial2_device);
#endif
#if defined(CONFIG_SYS_NS16550_COM3)
	serial_register(&eserial3_device);
#endif
#if defined(CONFIG_SYS_NS16550_COM4)
	serial_register(&eserial4_device);
#endif
#endif /* CONFIG_SYS_NS16550_SERIAL */
#if defined(CONFIG_FFUART)
	serial_register(&serial_ffuart_device);
#endif
#if defined(CONFIG_BTUART)
	serial_register(&serial_btuart_device);
#endif
#if defined(CONFIG_STUART)
	serial_register(&serial_stuart_device);
#endif
#if defined(CONFIG_S3C2410)
	serial_register(&s3c24xx_serial0_device);
	serial_register(&s3c24xx_serial1_device);
	serial_register(&s3c24xx_serial2_device);
#endif
#if defined(CONFIG_S5P)
	serial_register(&s5p_serial0_device);
	serial_register(&s5p_serial1_device);
	serial_register(&s5p_serial2_device);
	serial_register(&s5p_serial3_device);
#endif
#if defined(CONFIG_MPC512X)
#if defined(CONFIG_SYS_PSC1)
	serial_register(&serial1_device);
#endif
#if defined(CONFIG_SYS_PSC3)
	serial_register(&serial3_device);
#endif
#if defined(CONFIG_SYS_PSC4)
	serial_register(&serial4_device);
#endif
#if defined(CONFIG_SYS_PSC6)
	serial_register(&serial6_device);
#endif
#endif
#if defined(CONFIG_SYS_BFIN_UART)
	serial_register_bfin_uart();
#endif
#if defined(CONFIG_XILINX_UARTLITE)
# ifdef XILINX_UARTLITE_BASEADDR
	serial_register(&uartlite_serial0_device);
# endif /* XILINX_UARTLITE_BASEADDR */
# ifdef XILINX_UARTLITE_BASEADDR1
	serial_register(&uartlite_serial1_device);
# endif /* XILINX_UARTLITE_BASEADDR1 */
# ifdef XILINX_UARTLITE_BASEADDR2
	serial_register(&uartlite_serial2_device);
# endif /* XILINX_UARTLITE_BASEADDR2 */
# ifdef XILINX_UARTLITE_BASEADDR3
	serial_register(&uartlite_serial3_device);
# endif /* XILINX_UARTLITE_BASEADDR3 */
#endif /* CONFIG_XILINX_UARTLITE */
#if defined(CONFIG_ZYNQ_SERIAL)
# ifdef CONFIG_ZYNQ_SERIAL_BASEADDR0
	serial_register(&uart_zynq_serial0_device);
# endif
# ifdef CONFIG_ZYNQ_SERIAL_BASEADDR1
	serial_register(&uart_zynq_serial1_device);
# endif
#endif
	serial_assign(default_serial_console()->name);
}

void serial_stdio_init(void)
{
	struct stdio_dev dev;
	struct serial_device *s = serial_devices;

	while (s) {
		memset(&dev, 0, sizeof(dev));

		strcpy(dev.name, s->name);
		dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;

		dev.start = s->start;
		dev.stop = s->stop;
		dev.putc = s->putc;
		dev.puts = s->puts;
		dev.getc = s->getc;
		dev.tstc = s->tstc;

		stdio_register(&dev);

		s = s->next;
	}
}

int serial_assign(const char *name)
{
	struct serial_device *s;

	for (s = serial_devices; s; s = s->next) {
		if (strcmp(s->name, name) == 0) {
			serial_current = s;
			return 0;
		}
	}

	return 1;
}

void serial_reinit_all(void)
{
	struct serial_device *s;

	for (s = serial_devices; s; s = s->next)
		s->start();
}

static struct serial_device *get_current(void)
{
	struct serial_device *dev;

	if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
		dev = default_serial_console();

		/* We must have a console device */
		if (!dev)
			panic("Cannot find console");
	} else
		dev = serial_current;
	return dev;
}

int serial_init(void)
{
	return get_current()->start();
}

void serial_setbrg(void)
{
	get_current()->setbrg();
}

int serial_getc(void)
{
	return get_current()->getc();
}

int serial_tstc(void)
{
	return get_current()->tstc();
}

void serial_putc(const char c)
{
	get_current()->putc(c);
}

void serial_puts(const char *s)
{
	get_current()->puts(s);
}

#if CONFIG_POST & CONFIG_SYS_POST_UART
static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE;

/* Mark weak until post/cpu/.../uart.c migrate over */
__weak
int uart_post_test(int flags)
{
	unsigned char c;
	int ret, saved_baud, b;
	struct serial_device *saved_dev, *s;
	bd_t *bd = gd->bd;

	/* Save current serial state */
	ret = 0;
	saved_dev = serial_current;
	saved_baud = bd->bi_baudrate;

	for (s = serial_devices; s; s = s->next) {
		/* If this driver doesn't support loop back, skip it */
		if (!s->loop)
			continue;

		/* Test the next device */
		serial_current = s;

		ret = serial_init();
		if (ret)
			goto done;

		/* Consume anything that happens to be queued */
		while (serial_tstc())
			serial_getc();

		/* Enable loop back */
		s->loop(1);

		/* Test every available baud rate */
		for (b = 0; b < ARRAY_SIZE(bauds); ++b) {
			bd->bi_baudrate = bauds[b];
			serial_setbrg();

			/*
			 * Stick to printable chars to avoid issues:
			 *  - terminal corruption
			 *  - serial program reacting to sequences and sending
			 *    back random extra data
			 *  - most serial drivers add in extra chars (like \r\n)
			 */
			for (c = 0x20; c < 0x7f; ++c) {
				/* Send it out */
				serial_putc(c);

				/* Make sure it's the same one */
				ret = (c != serial_getc());
				if (ret) {
					s->loop(0);
					goto done;
				}

				/* Clean up the output in case it was sent */
				serial_putc('\b');
				ret = ('\b' != serial_getc());
				if (ret) {
					s->loop(0);
					goto done;
				}
			}
		}

		/* Disable loop back */
		s->loop(0);

		/* XXX: There is no serial_stop() !? */
		if (s->stop)
			s->stop();
	}

 done:
	/* Restore previous serial state */
	serial_current = saved_dev;
	bd->bi_baudrate = saved_baud;
	serial_reinit_all();
	serial_setbrg();

	return ret;
}
#endif
Commit	Line	Data
281e00a3 WD	1	/*
	2	* (C) Copyright 2004
	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
	5	* See file CREDITS for list of people who contributed to this
	6	* project.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of
	11	* the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	21	* MA 02111-1307 USA
	22	*/
	23
	24	#include <common.h>
	25	#include <serial.h>
52cb4d4f	26	#include <stdio_dev.h>
7b826c2f MF	27	#include <post.h>
7b826c2f MF	28	#include <linux/compiler.h>
281e00a3	29
d87080b7 WD	30	DECLARE_GLOBAL_DATA_PTR;
d87080b7 WD	31
a6e6f7f4 GF	32	static struct serial_device *serial_devices;
a6e6f7f4 GF	33	static struct serial_device *serial_current;
281e00a3	34
2a333aeb MV	35	static void serial_null(void)
	36	{
	37	}
	38
	39	#define serial_initfunc(name) \
	40	void name(void) \
	41	__attribute__((weak, alias("serial_null")));
	42
f0eb1f61 MV	43	serial_initfunc(mpc8xx_serial_initialize);
f0eb1f61 MV	44
c52b4f79	45	void serial_register(struct serial_device *dev)
281e00a3	46	{
2e5167cc	47	#ifdef CONFIG_NEEDS_MANUAL_RELOC
89143fb3	48	dev->start += gd->reloc_off;
281e00a3 WD	49	dev->setbrg += gd->reloc_off;
	50	dev->getc += gd->reloc_off;
	51	dev->tstc += gd->reloc_off;
	52	dev->putc += gd->reloc_off;
	53	dev->puts += gd->reloc_off;
521af04d	54	#endif
281e00a3 WD	55
	56	dev->next = serial_devices;
	57	serial_devices = dev;
281e00a3 WD	58	}
281e00a3 WD	59
a6e6f7f4	60	void serial_initialize(void)
281e00a3	61	{
f0eb1f61	62	mpc8xx_serial_initialize();
6d0f6bcf JCPV	63	#if defined(CONFIG_SYS_NS16550_SERIAL)
6d0f6bcf JCPV	64	#if defined(CONFIG_SYS_NS16550_COM1)
0fd30252 WD	65	serial_register(&eserial1_device);
0fd30252 WD	66	#endif
6d0f6bcf	67	#if defined(CONFIG_SYS_NS16550_COM2)
0fd30252 WD	68	serial_register(&eserial2_device);
0fd30252 WD	69	#endif
6d0f6bcf	70	#if defined(CONFIG_SYS_NS16550_COM3)
0fd30252 WD	71	serial_register(&eserial3_device);
0fd30252 WD	72	#endif
6d0f6bcf	73	#if defined(CONFIG_SYS_NS16550_COM4)
0fd30252 WD	74	serial_register(&eserial4_device);
0fd30252 WD	75	#endif
6d0f6bcf	76	#endif /* CONFIG_SYS_NS16550_SERIAL */
a6e6f7f4	77	#if defined(CONFIG_FFUART)
80172c61 SB	78	serial_register(&serial_ffuart_device);
80172c61 SB	79	#endif
a6e6f7f4	80	#if defined(CONFIG_BTUART)
80172c61 SB	81	serial_register(&serial_btuart_device);
80172c61 SB	82	#endif
a6e6f7f4	83	#if defined(CONFIG_STUART)
80172c61	84	serial_register(&serial_stuart_device);
a7c185ed HW	85	#endif
	86	#if defined(CONFIG_S3C2410)
	87	serial_register(&s3c24xx_serial0_device);
	88	serial_register(&s3c24xx_serial1_device);
	89	serial_register(&s3c24xx_serial2_device);
dd2c9e6a	90	#endif
889a275d	91	#if defined(CONFIG_S5P)
46a3b5c8 MK	92	serial_register(&s5p_serial0_device);
	93	serial_register(&s5p_serial1_device);
	94	serial_register(&s5p_serial2_device);
	95	serial_register(&s5p_serial3_device);
e3b28e67 AG	96	#endif
	97	#if defined(CONFIG_MPC512X)
	98	#if defined(CONFIG_SYS_PSC1)
	99	serial_register(&serial1_device);
	100	#endif
	101	#if defined(CONFIG_SYS_PSC3)
	102	serial_register(&serial3_device);
	103	#endif
	104	#if defined(CONFIG_SYS_PSC4)
	105	serial_register(&serial4_device);
	106	#endif
	107	#if defined(CONFIG_SYS_PSC6)
	108	serial_register(&serial6_device);
	109	#endif
635f330f MF	110	#endif
	111	#if defined(CONFIG_SYS_BFIN_UART)
	112	serial_register_bfin_uart();
80172c61	113	#endif
49a23e4a MS	114	#if defined(CONFIG_XILINX_UARTLITE)
	115	# ifdef XILINX_UARTLITE_BASEADDR
	116	serial_register(&uartlite_serial0_device);
	117	# endif /* XILINX_UARTLITE_BASEADDR */
	118	# ifdef XILINX_UARTLITE_BASEADDR1
	119	serial_register(&uartlite_serial1_device);
	120	# endif /* XILINX_UARTLITE_BASEADDR1 */
	121	# ifdef XILINX_UARTLITE_BASEADDR2
	122	serial_register(&uartlite_serial2_device);
	123	# endif /* XILINX_UARTLITE_BASEADDR2 */
	124	# ifdef XILINX_UARTLITE_BASEADDR3
	125	serial_register(&uartlite_serial3_device);
	126	# endif /* XILINX_UARTLITE_BASEADDR3 */
	127	#endif /* CONFIG_XILINX_UARTLITE */
194846f3 MS	128	#if defined(CONFIG_ZYNQ_SERIAL)
	129	# ifdef CONFIG_ZYNQ_SERIAL_BASEADDR0
	130	serial_register(&uart_zynq_serial0_device);
	131	# endif
	132	# ifdef CONFIG_ZYNQ_SERIAL_BASEADDR1
	133	serial_register(&uart_zynq_serial1_device);
	134	# endif
	135	#endif
a6e6f7f4	136	serial_assign(default_serial_console()->name);
281e00a3 WD	137	}
281e00a3 WD	138
a6e6f7f4	139	void serial_stdio_init(void)
281e00a3	140	{
52cb4d4f	141	struct stdio_dev dev;
281e00a3 WD	142	struct serial_device *s = serial_devices;
281e00a3 WD	143
2ee66533	144	while (s) {
a6e6f7f4	145	memset(&dev, 0, sizeof(dev));
281e00a3	146
a6e6f7f4	147	strcpy(dev.name, s->name);
281e00a3 WD	148	dev.flags = DEV_FLAGS_OUTPUT \| DEV_FLAGS_INPUT;
281e00a3 WD	149
89143fb3 MV	150	dev.start = s->start;
89143fb3 MV	151	dev.stop = s->stop;
281e00a3 WD	152	dev.putc = s->putc;
	153	dev.puts = s->puts;
	154	dev.getc = s->getc;
	155	dev.tstc = s->tstc;
	156
a6e6f7f4	157	stdio_register(&dev);
281e00a3 WD	158
	159	s = s->next;
	160	}
	161	}
	162
7813ca9b	163	int serial_assign(const char *name)
281e00a3 WD	164	{
	165	struct serial_device *s;
	166
2ee66533	167	for (s = serial_devices; s; s = s->next) {
a6e6f7f4	168	if (strcmp(s->name, name) == 0) {
281e00a3 WD	169	serial_current = s;
	170	return 0;
	171	}
	172	}
	173
	174	return 1;
	175	}
	176
a6e6f7f4	177	void serial_reinit_all(void)
281e00a3 WD	178	{
	179	struct serial_device *s;
	180
a6e6f7f4	181	for (s = serial_devices; s; s = s->next)
89143fb3	182	s->start();
281e00a3 WD	183	}
281e00a3 WD	184
857c283e	185	static struct serial_device *get_current(void)
281e00a3	186	{
857c283e	187	struct serial_device *dev;
2ee66533	188
857c283e SG	189	if (!(gd->flags & GD_FLG_RELOC) \|\| !serial_current) {
	190	dev = default_serial_console();
	191
	192	/* We must have a console device */
	193	if (!dev)
	194	panic("Cannot find console");
	195	} else
	196	dev = serial_current;
	197	return dev;
	198	}
281e00a3	199
857c283e SG	200	int serial_init(void)
857c283e SG	201	{
89143fb3	202	return get_current()->start();
281e00a3 WD	203	}
281e00a3 WD	204
a6e6f7f4	205	void serial_setbrg(void)
281e00a3	206	{
857c283e	207	get_current()->setbrg();
281e00a3 WD	208	}
281e00a3 WD	209
a6e6f7f4	210	int serial_getc(void)
281e00a3	211	{
857c283e	212	return get_current()->getc();
281e00a3 WD	213	}
281e00a3 WD	214
a6e6f7f4	215	int serial_tstc(void)
281e00a3	216	{
857c283e	217	return get_current()->tstc();
281e00a3 WD	218	}
281e00a3 WD	219
a6e6f7f4	220	void serial_putc(const char c)
281e00a3	221	{
857c283e	222	get_current()->putc(c);
281e00a3 WD	223	}
281e00a3 WD	224
a6e6f7f4	225	void serial_puts(const char *s)
281e00a3	226	{
857c283e	227	get_current()->puts(s);
281e00a3	228	}
7b826c2f MF	229
	230	#if CONFIG_POST & CONFIG_SYS_POST_UART
	231	static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE;
	232
	233	/* Mark weak until post/cpu/.../uart.c migrate over */
	234	__weak
	235	int uart_post_test(int flags)
	236	{
	237	unsigned char c;
	238	int ret, saved_baud, b;
	239	struct serial_device saved_dev, s;
	240	bd_t *bd = gd->bd;
	241
	242	/* Save current serial state */
	243	ret = 0;
	244	saved_dev = serial_current;
	245	saved_baud = bd->bi_baudrate;
	246
	247	for (s = serial_devices; s; s = s->next) {
	248	/* If this driver doesn't support loop back, skip it */
	249	if (!s->loop)
	250	continue;
	251
	252	/* Test the next device */
	253	serial_current = s;
	254
	255	ret = serial_init();
	256	if (ret)
	257	goto done;
	258
	259	/* Consume anything that happens to be queued */
	260	while (serial_tstc())
	261	serial_getc();
	262
	263	/* Enable loop back */
	264	s->loop(1);
	265
	266	/* Test every available baud rate */
	267	for (b = 0; b < ARRAY_SIZE(bauds); ++b) {
	268	bd->bi_baudrate = bauds[b];
	269	serial_setbrg();
	270
	271	/*
	272	* Stick to printable chars to avoid issues:
	273	* - terminal corruption
	274	* - serial program reacting to sequences and sending
	275	* back random extra data
	276	* - most serial drivers add in extra chars (like \r\n)
	277	*/
	278	for (c = 0x20; c < 0x7f; ++c) {
	279	/* Send it out */
	280	serial_putc(c);
	281
	282	/* Make sure it's the same one */
	283	ret = (c != serial_getc());
	284	if (ret) {
	285	s->loop(0);
	286	goto done;
	287	}
	288
	289	/* Clean up the output in case it was sent */
	290	serial_putc('\b');
	291	ret = ('\b' != serial_getc());
	292	if (ret) {
293	s->loop(0);
294	goto done;
295	}
296	}
297	}
298
299	/* Disable loop back */
300	s->loop(0);
301
89143fb3 MV	302	/* XXX: There is no serial_stop() !? */
	303	if (s->stop)
	304	s->stop();
7b826c2f MF	305	}
	306
	307	done:
	308	/* Restore previous serial state */
	309	serial_current = saved_dev;
	310	bd->bi_baudrate = saved_baud;
	311	serial_reinit_all();
	312	serial_setbrg();
	313
	314	return ret;
	315	}
	316	#endif