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Diffstat (limited to 'arch/cris/arch-v10/kernel/debugport.c')
-rw-r--r--arch/cris/arch-v10/kernel/debugport.c273
1 files changed, 196 insertions, 77 deletions
diff --git a/arch/cris/arch-v10/kernel/debugport.c b/arch/cris/arch-v10/kernel/debugport.c
index 6cf069e5e7b..f3a85b77c17 100644
--- a/arch/cris/arch-v10/kernel/debugport.c
+++ b/arch/cris/arch-v10/kernel/debugport.c
@@ -12,6 +12,31 @@
* 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.
*
@@ -114,7 +139,11 @@ struct dbg_port ports[]=
R_SERIAL0_BAUD,
R_SERIAL0_TR_CTRL,
R_SERIAL0_REC_CTRL,
- IO_STATE(R_IRQ_MASK1_SET, ser0_data, set)
+ IO_STATE(R_IRQ_MASK1_SET, ser0_data, set),
+ 0,
+ 115200,
+ 'N',
+ 8
},
{
1,
@@ -124,7 +153,11 @@ struct dbg_port ports[]=
R_SERIAL1_BAUD,
R_SERIAL1_TR_CTRL,
R_SERIAL1_REC_CTRL,
- IO_STATE(R_IRQ_MASK1_SET, ser1_data, set)
+ IO_STATE(R_IRQ_MASK1_SET, ser1_data, set),
+ 0,
+ 115200,
+ 'N',
+ 8
},
{
2,
@@ -134,7 +167,11 @@ struct dbg_port ports[]=
R_SERIAL2_BAUD,
R_SERIAL2_TR_CTRL,
R_SERIAL2_REC_CTRL,
- IO_STATE(R_IRQ_MASK1_SET, ser2_data, set)
+ IO_STATE(R_IRQ_MASK1_SET, ser2_data, set),
+ 0,
+ 115200,
+ 'N',
+ 8
},
{
3,
@@ -144,11 +181,15 @@ struct dbg_port ports[]=
R_SERIAL3_BAUD,
R_SERIAL3_TR_CTRL,
R_SERIAL3_REC_CTRL,
- IO_STATE(R_IRQ_MASK1_SET, ser3_data, set)
+ IO_STATE(R_IRQ_MASK1_SET, ser3_data, set),
+ 0,
+ 115200,
+ 'N',
+ 8
}
};
-static struct tty_driver *serial_driver;
+extern struct tty_driver *serial_driver;
struct dbg_port* port =
#if defined(CONFIG_ETRAX_DEBUG_PORT0)
@@ -162,37 +203,44 @@ struct dbg_port* port =
#else
NULL;
#endif
-/* Used by serial.c to register a debug_write_function so that the normal
- * serial driver is used for kernel debug output
- */
-typedef int (*debugport_write_function)(int i, const char *buf, unsigned int len);
-debugport_write_function debug_write_function = NULL;
+static struct dbg_port* kgdb_port =
+#if defined(CONFIG_ETRAX_KGDB_PORT0)
+ &ports[0];
+#elif defined(CONFIG_ETRAX_KGDB_PORT1)
+ &ports[1];
+#elif defined(CONFIG_ETRAX_KGDB_PORT2)
+ &ports[2];
+#elif defined(CONFIG_ETRAX_KGDB_PORT3)
+ &ports[3];
+#else
+ NULL;
+#endif
static void
-start_port(void)
+start_port(struct dbg_port* p)
{
unsigned long rec_ctrl = 0;
unsigned long tr_ctrl = 0;
- if (!port)
+ if (!p)
return;
- if (port->started)
+ if (p->started)
return;
- port->started = 1;
+ p->started = 1;
- if (port->index == 0)
+ if (p->index == 0)
{
genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma6);
genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma6, unused);
}
- else if (port->index == 1)
+ else if (p->index == 1)
{
genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma8);
genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma8, usb);
}
- else if (port->index == 2)
+ else if (p->index == 2)
{
genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma2);
genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma2, par0);
@@ -211,69 +259,69 @@ start_port(void)
*R_GEN_CONFIG = genconfig_shadow;
- *port->xoff =
+ *p->xoff =
IO_STATE(R_SERIAL0_XOFF, tx_stop, enable) |
IO_STATE(R_SERIAL0_XOFF, auto_xoff, disable) |
IO_FIELD(R_SERIAL0_XOFF, xoff_char, 0);
- switch (port->baudrate)
+ switch (p->baudrate)
{
case 0:
case 115200:
- *port->baud =
+ *p->baud =
IO_STATE(R_SERIAL0_BAUD, tr_baud, c115k2Hz) |
IO_STATE(R_SERIAL0_BAUD, rec_baud, c115k2Hz);
break;
case 1200:
- *port->baud =
+ *p->baud =
IO_STATE(R_SERIAL0_BAUD, tr_baud, c1200Hz) |
IO_STATE(R_SERIAL0_BAUD, rec_baud, c1200Hz);
break;
case 2400:
- *port->baud =
+ *p->baud =
IO_STATE(R_SERIAL0_BAUD, tr_baud, c2400Hz) |
IO_STATE(R_SERIAL0_BAUD, rec_baud, c2400Hz);
break;
case 4800:
- *port->baud =
+ *p->baud =
IO_STATE(R_SERIAL0_BAUD, tr_baud, c4800Hz) |
IO_STATE(R_SERIAL0_BAUD, rec_baud, c4800Hz);
break;
case 9600:
- *port->baud =
+ *p->baud =
IO_STATE(R_SERIAL0_BAUD, tr_baud, c9600Hz) |
IO_STATE(R_SERIAL0_BAUD, rec_baud, c9600Hz);
break;
case 19200:
- *port->baud =
+ *p->baud =
IO_STATE(R_SERIAL0_BAUD, tr_baud, c19k2Hz) |
IO_STATE(R_SERIAL0_BAUD, rec_baud, c19k2Hz);
break;
case 38400:
- *port->baud =
+ *p->baud =
IO_STATE(R_SERIAL0_BAUD, tr_baud, c38k4Hz) |
IO_STATE(R_SERIAL0_BAUD, rec_baud, c38k4Hz);
break;
case 57600:
- *port->baud =
+ *p->baud =
IO_STATE(R_SERIAL0_BAUD, tr_baud, c57k6Hz) |
IO_STATE(R_SERIAL0_BAUD, rec_baud, c57k6Hz);
break;
default:
- *port->baud =
+ *p->baud =
IO_STATE(R_SERIAL0_BAUD, tr_baud, c115k2Hz) |
IO_STATE(R_SERIAL0_BAUD, rec_baud, c115k2Hz);
break;
}
- if (port->parity == 'E') {
+ if (p->parity == 'E') {
rec_ctrl =
IO_STATE(R_SERIAL0_REC_CTRL, rec_par, even) |
IO_STATE(R_SERIAL0_REC_CTRL, rec_par_en, enable);
tr_ctrl =
IO_STATE(R_SERIAL0_TR_CTRL, tr_par, even) |
IO_STATE(R_SERIAL0_TR_CTRL, tr_par_en, enable);
- } else if (port->parity == 'O') {
+ } else if (p->parity == 'O') {
rec_ctrl =
IO_STATE(R_SERIAL0_REC_CTRL, rec_par, odd) |
IO_STATE(R_SERIAL0_REC_CTRL, rec_par_en, enable);
@@ -288,8 +336,7 @@ start_port(void)
IO_STATE(R_SERIAL0_TR_CTRL, tr_par, even) |
IO_STATE(R_SERIAL0_TR_CTRL, tr_par_en, disable);
}
-
- if (port->bits == 7)
+ if (p->bits == 7)
{
rec_ctrl |= IO_STATE(R_SERIAL0_REC_CTRL, rec_bitnr, rec_7bit);
tr_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, tr_bitnr, tr_7bit);
@@ -300,7 +347,7 @@ start_port(void)
tr_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, tr_bitnr, tr_8bit);
}
- *port->rec_ctrl =
+ *p->rec_ctrl =
IO_STATE(R_SERIAL0_REC_CTRL, dma_err, stop) |
IO_STATE(R_SERIAL0_REC_CTRL, rec_enable, enable) |
IO_STATE(R_SERIAL0_REC_CTRL, rts_, active) |
@@ -308,7 +355,7 @@ start_port(void)
IO_STATE(R_SERIAL0_REC_CTRL, rec_stick_par, normal) |
rec_ctrl;
- *port->tr_ctrl =
+ *p->tr_ctrl =
IO_FIELD(R_SERIAL0_TR_CTRL, txd, 0) |
IO_STATE(R_SERIAL0_TR_CTRL, tr_enable, enable) |
IO_STATE(R_SERIAL0_TR_CTRL, auto_cts, disabled) |
@@ -323,8 +370,18 @@ console_write_direct(struct console *co, const char *buf, unsigned int len)
int i;
unsigned long flags;
local_irq_save(flags);
+
+ if (!port)
+ return;
+
/* Send data */
for (i = 0; i < len; i++) {
+ /* LF -> CRLF */
+ if (buf[i] == '\n') {
+ while (!(*port->read & IO_MASK(R_SERIAL0_READ, tr_ready)))
+ ;
+ *port->write = '\r';
+ }
/* Wait until transmitter is ready and send.*/
while (!(*port->read & IO_MASK(R_SERIAL0_READ, tr_ready)))
;
@@ -333,6 +390,25 @@ console_write_direct(struct console *co, const char *buf, unsigned int len)
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;
+}
+
static void
console_write(struct console *co, const char *buf, unsigned int len)
{
@@ -345,18 +421,7 @@ console_write(struct console *co, const char *buf, unsigned int len)
return;
#endif
- start_port();
-
-#ifdef CONFIG_ETRAX_KGDB
- /* kgdb needs to output debug info using the gdb protocol */
- putDebugString(buf, len);
- return;
-#endif
-
- if (debug_write_function)
- debug_write_function(co->index, buf, len);
- else
- console_write_direct(co, buf, len);
+ console_write_direct(co, buf, len);
}
/* legacy function */
@@ -374,8 +439,11 @@ getDebugChar(void)
{
unsigned long readval;
+ if (!kgdb_port)
+ return 0;
+
do {
- readval = *port->read;
+ readval = *kgdb_port->read;
} while (!(readval & IO_MASK(R_SERIAL0_READ, data_avail)));
return (readval & IO_MASK(R_SERIAL0_READ, data_in));
@@ -386,9 +454,12 @@ getDebugChar(void)
void
putDebugChar(int val)
{
- while (!(*port->read & IO_MASK(R_SERIAL0_READ, tr_ready)))
+ if (!kgdb_port)
+ return;
+
+ while (!(*kgdb_port->read & IO_MASK(R_SERIAL0_READ, tr_ready)))
;
- *port->write = val;
+ *kgdb_port->write = val;
}
/* Enable irq for receiving chars on the debug port, used by kgdb */
@@ -396,19 +467,16 @@ putDebugChar(int val)
void
enableDebugIRQ(void)
{
- *R_IRQ_MASK1_SET = port->irq;
+ if (!kgdb_port)
+ return;
+
+ *R_IRQ_MASK1_SET = kgdb_port->irq;
/* use R_VECT_MASK directly, since we really bypass Linux normal
* IRQ handling in kgdb anyway, we don't need to use enable_irq
*/
*R_VECT_MASK_SET = IO_STATE(R_VECT_MASK_SET, serial, set);
- *port->rec_ctrl = IO_STATE(R_SERIAL0_REC_CTRL, rec_enable, enable);
-}
-
-static struct tty_driver*
-etrax_console_device(struct console* co, int *index)
-{
- return serial_driver;
+ *kgdb_port->rec_ctrl = IO_STATE(R_SERIAL0_REC_CTRL, rec_enable, enable);
}
static int __init
@@ -428,11 +496,69 @@ console_setup(struct console *co, char *options)
if (*s) port->parity = *s++;
if (*s) port->bits = *s++ - '0';
port->started = 0;
- start_port();
+ start_port(0);
}
return 0;
}
+/* This is a dummy serial device that throws away anything written to it.
+ * This is used when no debug output is wanted.
+ */
+static struct tty_driver dummy_driver;
+
+static int dummy_open(struct tty_struct *tty, struct file * filp)
+{
+ return 0;
+}
+
+static void dummy_close(struct tty_struct *tty, struct file * filp)
+{
+}
+
+static int dummy_write(struct tty_struct * tty,
+ const unsigned char *buf, int count)
+{
+ return count;
+}
+
+static int
+dummy_write_room(struct tty_struct *tty)
+{
+ return 8192;
+}
+
+void __init
+init_dummy_console(void)
+{
+ memset(&dummy_driver, 0, sizeof(struct tty_driver));
+ dummy_driver.driver_name = "serial";
+ dummy_driver.name = "ttyS";
+ dummy_driver.major = TTY_MAJOR;
+ dummy_driver.minor_start = 68;
+ dummy_driver.num = 1; /* etrax100 has 4 serial ports */
+ dummy_driver.type = TTY_DRIVER_TYPE_SERIAL;
+ dummy_driver.subtype = SERIAL_TYPE_NORMAL;
+ dummy_driver.init_termios = tty_std_termios;
+ dummy_driver.init_termios.c_cflag =
+ B115200 | CS8 | CREAD | HUPCL | CLOCAL; /* is normally B9600 default... */
+ dummy_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
+
+ dummy_driver.open = dummy_open;
+ dummy_driver.close = dummy_close;
+ dummy_driver.write = dummy_write;
+ dummy_driver.write_room = dummy_write_room;
+ if (tty_register_driver(&dummy_driver))
+ panic("Couldn't register dummy serial driver\n");
+}
+
+static struct tty_driver*
+etrax_console_device(struct console* co, int *index)
+{
+ if (port)
+ *index = port->index;
+ return port ? serial_driver : &dummy_driver;
+}
+
static struct console sercons = {
name : "ttyS",
write: console_write,
@@ -504,28 +630,21 @@ init_etrax_debug(void)
static int first = 1;
if (!first) {
- if (!port) {
- register_console(&sercons0);
- register_console(&sercons1);
- register_console(&sercons2);
- register_console(&sercons3);
- unregister_console(&sercons);
- }
+ unregister_console(&sercons);
+ register_console(&sercons0);
+ register_console(&sercons1);
+ register_console(&sercons2);
+ register_console(&sercons3);
+ init_dummy_console();
return 0;
}
- first = 0;
- if (port)
- register_console(&sercons);
- return 0;
-}
-int __init
-init_console(void)
-{
- serial_driver = alloc_tty_driver(1);
- if (!serial_driver)
- return -ENOMEM;
+ first = 0;
+ register_console(&sercons);
+ start_port(port);
+#ifdef CONFIG_ETRAX_KGDB
+ start_port(kgdb_port);
+#endif
return 0;
}
-
__initcall(init_etrax_debug);
generated by cgit (git 2.34.1) at 2024-11-10 17:36:33 +0000