linux/drivers/serial/suncore.c

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/* 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"
[SERIAL] sparc: Infrastructure to fix section mismatch bugs. This patch against 2.6.23 sparc-2.6.git contains a number of minor cleanups of the sparc serial drivers. Initially I fixed this build warning: WARNING: vmlinux.o(.text+0x107a2c): Section mismatch: reference to .init.text:add_preferred_console (between 'sunserial_console_match' and 'sunserial_console_termios') which is done by declaring sunserial_console_match() as __init. This resulted in build warnings on sunserial_current_minor. To resolve these the variable was changed so it is no longer global, and to hide operations on it inside 2 new functions. These functions handle the UART minor handling code that is common to all sparc serial drivers. These changes allowed to clean up the uart counters in all the sparc serial drivers, and the administration of minor device numbers. Lastly, sunserial_console_termios() does not need to be exported since it is only called from non-modular code. Sadly, the following build warning still exists: WARNING: vmlinux.o(__ksymtab+0x2910): Section mismatch: reference to .init.text:sunserial_console_match (between '__ksymtab_sunserial_console_match' and '__ksymtab_sunserial_unregister_minors') This could be resolved by not exporting sunserial_console_match(), but this is not possible at the moment because it is being called from modular code. On the other hand, this is a bogus warning since it comes from a ksymtab section. Signed-off-by: Martin Habets <errandir_news@mph.eclipse.co.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-12-11 11:37:04 +00:00
static int sunserial_current_minor = 64;
[SERIAL] sparc: Infrastructure to fix section mismatch bugs. This patch against 2.6.23 sparc-2.6.git contains a number of minor cleanups of the sparc serial drivers. Initially I fixed this build warning: WARNING: vmlinux.o(.text+0x107a2c): Section mismatch: reference to .init.text:add_preferred_console (between 'sunserial_console_match' and 'sunserial_console_termios') which is done by declaring sunserial_console_match() as __init. This resulted in build warnings on sunserial_current_minor. To resolve these the variable was changed so it is no longer global, and to hide operations on it inside 2 new functions. These functions handle the UART minor handling code that is common to all sparc serial drivers. These changes allowed to clean up the uart counters in all the sparc serial drivers, and the administration of minor device numbers. Lastly, sunserial_console_termios() does not need to be exported since it is only called from non-modular code. Sadly, the following build warning still exists: WARNING: vmlinux.o(__ksymtab+0x2910): Section mismatch: reference to .init.text:sunserial_console_match (between '__ksymtab_sunserial_console_match' and '__ksymtab_sunserial_unregister_minors') This could be resolved by not exporting sunserial_console_match(), but this is not possible at the moment because it is being called from modular code. On the other hand, this is a bogus warning since it comes from a ksymtab section. Signed-off-by: Martin Habets <errandir_news@mph.eclipse.co.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-12-11 11:37:04 +00:00
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)
{
int off;
if (!con || of_console_device != dp)
return 0;
off = 0;
if (of_console_options &&
*of_console_options == 'b')
off = 1;
if ((line & 1) != off)
return 0;
con->index = line;
drv->cons = con;
add_preferred_console(con->name, line, NULL);
return 1;
}
EXPORT_SYMBOL(sunserial_console_match);
void
sunserial_console_termios(struct console *con)
{
struct device_node *dp;
const char *od, *mode, *s;
char mode_prop[] = "ttyX-mode";
int baud, bits, stop, cflag;
char parity;
dp = of_find_node_by_path("/options");
od = of_get_property(dp, "output-device", NULL);
if (!strcmp(od, "rsc")) {
mode = of_get_property(of_console_device,
"ssp-console-modes", NULL);
if (!mode)
mode = "115200,8,n,1,-";
} else {
char c;
c = 'a';
if (of_console_options)
c = *of_console_options;
mode_prop[3] = c;
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");