/* Serialport functions for debugging
*
- * Copyright (c) 2000 Axis Communications AB
+ * Copyright (c) 2000-2007 Axis Communications AB
*
* Authors: Bjorn Wesen
*
* enableDebugIRQ()
* init_etrax_debug()
*
- * $Log: debugport.c,v $
- * Revision 1.27 2005/06/10 10:34:14 starvik
- * Real console support
- *
- * Revision 1.26 2005/06/07 07:06:07 starvik
- * Added LF->CR translation to make ETRAX customers happy.
- *
- * Revision 1.25 2005/03/08 08:56:47 mikaelam
- * Do only set index as port->index if port is defined, otherwise use the index from the command line
- *
- * Revision 1.24 2005/01/19 10:26:33 mikaelam
- * Return the cris serial driver in console device driver callback function
- *
- * Revision 1.23 2005/01/14 10:12:17 starvik
- * KGDB on separate port.
- * Console fixes from 2.4.
- *
- * Revision 1.22 2005/01/11 16:06:13 starvik
- * typo
- *
- * Revision 1.21 2005/01/11 13:49:14 starvik
- * Added raw_printk to be used where we don't trust the console.
- *
- * Revision 1.20 2004/12/27 11:18:32 starvik
- * Merge of Linux 2.6.10 (not functional yet).
- *
- * Revision 1.19 2004/10/21 07:26:16 starvik
- * Made it possible to specify console settings on kernel command line.
- *
- * Revision 1.18 2004/10/19 13:07:37 starvik
- * Merge of Linux 2.6.9
- *
- * Revision 1.17 2004/09/29 10:33:46 starvik
- * Resolved a dealock when printing debug from kernel.
- *
- * Revision 1.16 2004/08/24 06:12:19 starvik
- * Whitespace cleanup
- *
- * Revision 1.15 2004/08/16 12:37:19 starvik
- * Merge of Linux 2.6.8
- *
- * Revision 1.14 2004/05/17 13:11:29 starvik
- * Disable DMA until real serial driver is up
- *
- * Revision 1.13 2004/05/14 07:58:01 starvik
- * Merge of changes from 2.4
- *
- * Revision 1.12 2003/09/11 07:29:49 starvik
- * Merge of Linux 2.6.0-test5
- *
- * Revision 1.11 2003/07/07 09:53:36 starvik
- * Revert all the 2.5.74 merge changes to make the console work again
- *
- * Revision 1.9 2003/02/17 17:07:23 starvik
- * Solved the problem with corrupted debug output (from Linux 2.4)
- * * Wait until DMA, FIFO and pipe is empty before and after transmissions
- * * Buffer data until a FIFO flush can be triggered.
- *
- * Revision 1.8 2003/01/22 06:48:36 starvik
- * Fixed warnings issued by GCC 3.2.1
- *
- * Revision 1.7 2002/12/12 08:26:32 starvik
- * Don't use C-comments inside CVS comments
- *
- * Revision 1.6 2002/12/11 15:42:02 starvik
- * Extracted v10 (ETRAX 100LX) specific stuff from arch/cris/kernel/
- *
- * Revision 1.5 2002/11/20 06:58:03 starvik
- * Compiles with kgdb
- *
- * Revision 1.4 2002/11/19 14:35:24 starvik
- * Changes from linux 2.4
- * Changed struct initializer syntax to the currently prefered notation
- *
- * Revision 1.3 2002/11/06 09:47:03 starvik
- * Modified for new interrupt macros
- *
- * Revision 1.2 2002/01/21 15:21:50 bjornw
- * Update for kdev_t changes
- *
- * Revision 1.6 2001/04/17 13:58:39 orjanf
- * * Renamed CONFIG_KGDB to CONFIG_ETRAX_KGDB.
- *
- * Revision 1.5 2001/03/26 14:22:05 bjornw
- * Namechange of some config options
- *
- * Revision 1.4 2000/10/06 12:37:26 bjornw
- * Use physical addresses when talking to DMA
- *
- *
*/
#include <linux/console.h>
#include <asm/arch/svinto.h>
#include <asm/io.h> /* Get SIMCOUT. */
+extern void reset_watchdog(void);
+
struct dbg_port
{
unsigned int index;
}
};
+#ifdef CONFIG_ETRAX_SERIAL
extern struct tty_driver *serial_driver;
+#endif
struct dbg_port* port =
#if defined(CONFIG_ETRAX_DEBUG_PORT0)
{
int i;
unsigned long flags;
- local_irq_save(flags);
if (!port)
return;
+ local_irq_save(flags);
+
/* Send data */
for (i = 0; i < len; i++) {
/* LF -> CRLF */
;
*port->write = buf[i];
}
- local_irq_restore(flags);
-}
-int raw_printk(const char *fmt, ...)
-{
- static char buf[1024];
- int printed_len;
- static int first = 1;
- if (first) {
- /* Force reinitialization of the port to get manual mode. */
- port->started = 0;
- start_port(port);
- first = 0;
- }
- va_list args;
- va_start(args, fmt);
- printed_len = vsnprintf(buf, sizeof(buf), fmt, args);
- va_end(args);
- console_write_direct(NULL, buf, strlen(buf));
- return printed_len;
+ /*
+ * Feed the watchdog, otherwise it will reset the chip during boot.
+ * The time to send an ordinary boot message line (10-90 chars)
+ * varies between 1-8ms at 115200. What makes up for the additional
+ * 90ms that allows the watchdog to bite?
+ */
+ reset_watchdog();
+
+ local_irq_restore(flags);
}
static void
return 0;
}
+
/* This is a dummy serial device that throws away anything written to it.
* This is used when no debug output is wanted.
*/
return count;
}
-static int
-dummy_write_room(struct tty_struct *tty)
+static int dummy_write_room(struct tty_struct *tty)
{
return 8192;
}
+static const struct tty_operations dummy_ops = {
+ .open = dummy_open,
+ .close = dummy_close,
+ .write = dummy_write,
+ .write_room = dummy_write_room,
+};
+
void __init
init_dummy_console(void)
{
dummy_driver.type = TTY_DRIVER_TYPE_SERIAL;
dummy_driver.subtype = SERIAL_TYPE_NORMAL;
dummy_driver.init_termios = tty_std_termios;
+ /* Normally B9600 default... */
dummy_driver.init_termios.c_cflag =
- B115200 | CS8 | CREAD | HUPCL | CLOCAL; /* is normally B9600 default... */
+ B115200 | CS8 | CREAD | HUPCL | CLOCAL;
dummy_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+ dummy_driver.init_termios.c_ispeed = 115200;
+ dummy_driver.init_termios.c_ospeed = 115200;
- dummy_driver.open = dummy_open;
- dummy_driver.close = dummy_close;
- dummy_driver.write = dummy_write;
- dummy_driver.write_room = dummy_write_room;
+ dummy_driver.ops = &dummy_ops;
if (tty_register_driver(&dummy_driver))
panic("Couldn't register dummy serial driver\n");
}
{
if (port)
*index = port->index;
+ else
+ *index = 0;
+#ifdef CONFIG_ETRAX_SERIAL
return port ? serial_driver : &dummy_driver;
+#else
+ return &dummy_driver;
+#endif
}
static struct console sercons = {
git.openpandora.org / pandora-kernel.git / blobdiff