[net-next-2.6.git] / drivers / serial / suncore.c

/* suncore.c
 *
 * Common SUN serial routines.  Based entirely
 * upon drivers/sbus/char/sunserial.c which is:
 *
 * Copyright (C) 1997  Eddie C. Dost  (ecd@skynet.be)
 *
 * Adaptation to new UART layer is:
 *
 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/console.h>
#include <linux/tty.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/serial_core.h>
#include <linux/init.h>

#include <asm/prom.h>

#include "suncore.h"

static int sunserial_current_minor = 64;

int sunserial_register_minors(struct uart_driver *drv, int count)
{
	int err = 0;

	drv->minor = sunserial_current_minor;
	drv->nr += count;
	/* Register the driver on the first call */
	if (drv->nr == count)
		err = uart_register_driver(drv);
	if (err == 0) {
		sunserial_current_minor += count;
		drv->tty_driver->name_base = drv->minor - 64;
	}
	return err;
}
EXPORT_SYMBOL(sunserial_register_minors);

void sunserial_unregister_minors(struct uart_driver *drv, int count)
{
	drv->nr -= count;
	sunserial_current_minor -= count;

	if (drv->nr == 0)
		uart_unregister_driver(drv);
}
EXPORT_SYMBOL(sunserial_unregister_minors);

int sunserial_console_match(struct console *con, struct device_node *dp,
			    struct uart_driver *drv, int line, bool ignore_line)
{
	if (!con)
		return 0;

	drv->cons = con;

	if (of_console_device != dp)
		return 0;

	if (!ignore_line) {
		int off = 0;

		if (of_console_options &&
		    *of_console_options == 'b')
			off = 1;

		if ((line & 1) != off)
			return 0;
	}

	if (!console_set_on_cmdline) {
		con->index = line;
		add_preferred_console(con->name, line, NULL);
	}
	return 1;
}
EXPORT_SYMBOL(sunserial_console_match);

void sunserial_console_termios(struct console *con, struct device_node *uart_dp)
{
	const char *mode, *s;
	char mode_prop[] = "ttyX-mode";
	int baud, bits, stop, cflag;
	char parity;

	if (!strcmp(uart_dp->name, "rsc") ||
	    !strcmp(uart_dp->name, "rsc-console") ||
	    !strcmp(uart_dp->name, "rsc-control")) {
		mode = of_get_property(uart_dp,
				       "ssp-console-modes", NULL);
		if (!mode)
			mode = "115200,8,n,1,-";
	} else if (!strcmp(uart_dp->name, "lom-console")) {
		mode = "9600,8,n,1,-";
	} else {
		struct device_node *dp;
		char c;

		c = 'a';
		if (of_console_options)
			c = *of_console_options;

		mode_prop[3] = c;

		dp = of_find_node_by_path("/options");
		mode = of_get_property(dp, mode_prop, NULL);
		if (!mode)
			mode = "9600,8,n,1,-";
	}

	cflag = CREAD | HUPCL | CLOCAL;

	s = mode;
	baud = simple_strtoul(s, NULL, 0);
	s = strchr(s, ',');
	bits = simple_strtoul(++s, NULL, 0);
	s = strchr(s, ',');
	parity = *(++s);
	s = strchr(s, ',');
	stop = simple_strtoul(++s, NULL, 0);
	s = strchr(s, ',');
	/* XXX handshake is not handled here. */

	switch (baud) {
		case 150: cflag |= B150; break;
		case 300: cflag |= B300; break;
		case 600: cflag |= B600; break;
		case 1200: cflag |= B1200; break;
		case 2400: cflag |= B2400; break;
		case 4800: cflag |= B4800; break;
		case 9600: cflag |= B9600; break;
		case 19200: cflag |= B19200; break;
		case 38400: cflag |= B38400; break;
		case 57600: cflag |= B57600; break;
		case 115200: cflag |= B115200; break;
		case 230400: cflag |= B230400; break;
		case 460800: cflag |= B460800; break;
		default: baud = 9600; cflag |= B9600; break;
	}

	switch (bits) {
		case 5: cflag |= CS5; break;
		case 6: cflag |= CS6; break;
		case 7: cflag |= CS7; break;
		case 8: cflag |= CS8; break;
		default: cflag |= CS8; break;
	}

	switch (parity) {
		case 'o': cflag |= (PARENB | PARODD); break;
		case 'e': cflag |= PARENB; break;
		case 'n': default: break;
	}

	switch (stop) {
		case 2: cflag |= CSTOPB; break;
		case 1: default: break;
	}

	con->cflag = cflag;
}

/* Sun serial MOUSE auto baud rate detection.  */
static struct mouse_baud_cflag {
	int baud;
	unsigned int cflag;
} mouse_baud_table[] = {
	{ 1200, B1200 },
	{ 2400, B2400 },
	{ 4800, B4800 },
	{ 9600, B9600 },
	{ -1, ~0 },
	{ -1, ~0 },
};

unsigned int suncore_mouse_baud_cflag_next(unsigned int cflag, int *new_baud)
{
	int i;

	for (i = 0; mouse_baud_table[i].baud != -1; i++)
		if (mouse_baud_table[i].cflag == (cflag & CBAUD))
			break;

	i += 1;
	if (mouse_baud_table[i].baud == -1)
		i = 0;

	*new_baud = mouse_baud_table[i].baud;
	return mouse_baud_table[i].cflag;
}

EXPORT_SYMBOL(suncore_mouse_baud_cflag_next);

/* Basically, when the baud rate is wrong the mouse spits out
 * breaks to us.
 */
int suncore_mouse_baud_detection(unsigned char ch, int is_break)
{
	static int mouse_got_break = 0;
	static int ctr = 0;

	if (is_break) {
		/* Let a few normal bytes go by before we jump the gun
		 * and say we need to try another baud rate.
		 */
		if (mouse_got_break && ctr < 8)
			return 1;

		/* Ok, we need to try another baud. */
		ctr = 0;
		mouse_got_break = 1;
		return 2;
	}
	if (mouse_got_break) {
		ctr++;
		if (ch == 0x87) {
			/* Correct baud rate determined. */
			mouse_got_break = 0;
		}
		return 1;
	}
	return 0;
}

EXPORT_SYMBOL(suncore_mouse_baud_detection);

static int __init suncore_init(void)
{
	return 0;
}

static void __exit suncore_exit(void)
{
}

module_init(suncore_init);
module_exit(suncore_exit);

MODULE_AUTHOR("Eddie C. Dost, David S. Miller");
MODULE_DESCRIPTION("Sun serial common layer");
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/* suncore.c
	2	*
	3	* Common SUN serial routines. Based entirely
	4	* upon drivers/sbus/char/sunserial.c which is:
	5	*
	6	* Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
	7	*
	8	* Adaptation to new UART layer is:
	9	*
	10	* Copyright (C) 2002 David S. Miller (davem@redhat.com)
	11	*/
	12
1da177e4 LT	13	#include <linux/module.h>
	14	#include <linux/kernel.h>
	15	#include <linux/console.h>
	16	#include <linux/tty.h>
	17	#include <linux/errno.h>
	18	#include <linux/string.h>
c73fcc84	19	#include <linux/serial_core.h>
1da177e4 LT	20	#include <linux/init.h>
1da177e4 LT	21
c73fcc84	22	#include <asm/prom.h>
1da177e4 LT	23
	24	#include "suncore.h"
	25
58d784a5	26	static int sunserial_current_minor = 64;
1da177e4	27
58d784a5 MH	28	int sunserial_register_minors(struct uart_driver *drv, int count)
	29	{
	30	int err = 0;
	31
	32	drv->minor = sunserial_current_minor;
	33	drv->nr += count;
	34	/* Register the driver on the first call */
	35	if (drv->nr == count)
	36	err = uart_register_driver(drv);
	37	if (err == 0) {
	38	sunserial_current_minor += count;
	39	drv->tty_driver->name_base = drv->minor - 64;
	40	}
	41	return err;
	42	}
	43	EXPORT_SYMBOL(sunserial_register_minors);
	44
	45	void sunserial_unregister_minors(struct uart_driver *drv, int count)
	46	{
	47	drv->nr -= count;
	48	sunserial_current_minor -= count;
	49
	50	if (drv->nr == 0)
	51	uart_unregister_driver(drv);
	52	}
	53	EXPORT_SYMBOL(sunserial_unregister_minors);
1da177e4	54
fb445ee5	55	int sunserial_console_match(struct console con, struct device_node dp,
4e3533d0	56	struct uart_driver *drv, int line, bool ignore_line)
1da177e4	57	{
0a492896 DM	58	if (!con)
	59	return 0;
	60
	61	drv->cons = con;
	62
	63	if (of_console_device != dp)
c73fcc84	64	return 0;
1da177e4	65
4e3533d0 DM	66	if (!ignore_line) {
4e3533d0 DM	67	int off = 0;
1da177e4	68
4e3533d0 DM	69	if (of_console_options &&
	70	*of_console_options == 'b')
	71	off = 1;
	72
	73	if ((line & 1) != off)
	74	return 0;
	75	}
1da177e4	76
0a492896 DM	77	if (!console_set_on_cmdline) {
0a492896 DM	78	con->index = line;
7c1f6afc	79	add_preferred_console(con->name, line, NULL);
0a492896	80	}
c73fcc84 DM	81	return 1;
	82	}
	83	EXPORT_SYMBOL(sunserial_console_match);
1da177e4	84
457931de	85	void sunserial_console_termios(struct console con, struct device_node uart_dp)
c73fcc84	86	{
457931de	87	const char mode, s;
c73fcc84 DM	88	char mode_prop[] = "ttyX-mode";
	89	int baud, bits, stop, cflag;
	90	char parity;
1da177e4	91
457931de DM	92	if (!strcmp(uart_dp->name, "rsc") \|\|
	93	!strcmp(uart_dp->name, "rsc-console") \|\|
	94	!strcmp(uart_dp->name, "rsc-control")) {
	95	mode = of_get_property(uart_dp,
c73fcc84 DM	96	"ssp-console-modes", NULL);
	97	if (!mode)
	98	mode = "115200,8,n,1,-";
457931de DM	99	} else if (!strcmp(uart_dp->name, "lom-console")) {
457931de DM	100	mode = "9600,8,n,1,-";
c73fcc84	101	} else {
457931de	102	struct device_node *dp;
c73fcc84 DM	103	char c;
	104
	105	c = 'a';
	106	if (of_console_options)
	107	c = *of_console_options;
	108
	109	mode_prop[3] = c;
	110
457931de	111	dp = of_find_node_by_path("/options");
c73fcc84 DM	112	mode = of_get_property(dp, mode_prop, NULL);
	113	if (!mode)
	114	mode = "9600,8,n,1,-";
1da177e4 LT	115	}
1da177e4 LT	116
1da177e4 LT	117	cflag = CREAD \| HUPCL \| CLOCAL;
	118
	119	s = mode;
	120	baud = simple_strtoul(s, NULL, 0);
	121	s = strchr(s, ',');
	122	bits = simple_strtoul(++s, NULL, 0);
	123	s = strchr(s, ',');
	124	parity = *(++s);
	125	s = strchr(s, ',');
	126	stop = simple_strtoul(++s, NULL, 0);
	127	s = strchr(s, ',');
	128	/* XXX handshake is not handled here. */
	129
	130	switch (baud) {
	131	case 150: cflag \|= B150; break;
	132	case 300: cflag \|= B300; break;
	133	case 600: cflag \|= B600; break;
	134	case 1200: cflag \|= B1200; break;
	135	case 2400: cflag \|= B2400; break;
	136	case 4800: cflag \|= B4800; break;
	137	case 9600: cflag \|= B9600; break;
	138	case 19200: cflag \|= B19200; break;
	139	case 38400: cflag \|= B38400; break;
c126cf80 ED	140	case 57600: cflag \|= B57600; break;
	141	case 115200: cflag \|= B115200; break;
	142	case 230400: cflag \|= B230400; break;
	143	case 460800: cflag \|= B460800; break;
1da177e4 LT	144	default: baud = 9600; cflag \|= B9600; break;
	145	}
	146
	147	switch (bits) {
	148	case 5: cflag \|= CS5; break;
	149	case 6: cflag \|= CS6; break;
	150	case 7: cflag \|= CS7; break;
	151	case 8: cflag \|= CS8; break;
	152	default: cflag \|= CS8; break;
	153	}
	154
	155	switch (parity) {
	156	case 'o': cflag \|= (PARENB \| PARODD); break;
	157	case 'e': cflag \|= PARENB; break;
	158	case 'n': default: break;
	159	}
	160
	161	switch (stop) {
	162	case 2: cflag \|= CSTOPB; break;
	163	case 1: default: break;
	164	}
	165
	166	con->cflag = cflag;
	167	}
	168
1da177e4 LT	169	/* Sun serial MOUSE auto baud rate detection. */
	170	static struct mouse_baud_cflag {
	171	int baud;
	172	unsigned int cflag;
	173	} mouse_baud_table[] = {
	174	{ 1200, B1200 },
	175	{ 2400, B2400 },
	176	{ 4800, B4800 },
	177	{ 9600, B9600 },
	178	{ -1, ~0 },
	179	{ -1, ~0 },
	180	};
	181
	182	unsigned int suncore_mouse_baud_cflag_next(unsigned int cflag, int *new_baud)
	183	{
	184	int i;
	185
	186	for (i = 0; mouse_baud_table[i].baud != -1; i++)
	187	if (mouse_baud_table[i].cflag == (cflag & CBAUD))
	188	break;
	189
	190	i += 1;
	191	if (mouse_baud_table[i].baud == -1)
	192	i = 0;
	193
	194	*new_baud = mouse_baud_table[i].baud;
	195	return mouse_baud_table[i].cflag;
	196	}
	197
	198	EXPORT_SYMBOL(suncore_mouse_baud_cflag_next);
	199
	200	/* Basically, when the baud rate is wrong the mouse spits out
	201	* breaks to us.
	202	*/
	203	int suncore_mouse_baud_detection(unsigned char ch, int is_break)
	204	{
	205	static int mouse_got_break = 0;
	206	static int ctr = 0;
	207
	208	if (is_break) {
	209	/* Let a few normal bytes go by before we jump the gun
	210	* and say we need to try another baud rate.
	211	*/
	212	if (mouse_got_break && ctr < 8)
	213	return 1;
	214
	215	/* Ok, we need to try another baud. */
	216	ctr = 0;
	217	mouse_got_break = 1;
	218	return 2;
	219	}
	220	if (mouse_got_break) {
	221	ctr++;
	222	if (ch == 0x87) {
	223	/* Correct baud rate determined. */
	224	mouse_got_break = 0;
	225	}
	226	return 1;
	227	}
	228	return 0;
	229	}
	230
	231	EXPORT_SYMBOL(suncore_mouse_baud_detection);
	232
233	static int __init suncore_init(void)
234	{
235	return 0;
236	}
237
238	static void __exit suncore_exit(void)
239	{
240	}
241
242	module_init(suncore_init);
243	module_exit(suncore_exit);
244
245	MODULE_AUTHOR("Eddie C. Dost, David S. Miller");
246	MODULE_DESCRIPTION("Sun serial common layer");
247	MODULE_LICENSE("GPL");