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authorLinus Torvalds <torvalds@g5.osdl.org>2005-11-01 21:32:46 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-01 21:32:46 -0800
commitec33b309101bb2904e9fe20252f7760e254d05ec (patch)
tree13cde551f2ef845801d9e59081258572e1ac222a
parent7f36b1e9582c06d0ddef5f2416c9b17017647d1f (diff)
parent913ade51eca369553a8ffbdaf1f426fade84f6ae (diff)
downloadlinux-ec33b309101bb2904e9fe20252f7760e254d05ec.tar.bz2
Merge master.kernel.org:/home/rmk/linux-2.6-serial
-rw-r--r--Documentation/serial/driver66
-rw-r--r--drivers/serial/serial_core.c4
-rw-r--r--include/linux/serial_core.h7
3 files changed, 64 insertions, 13 deletions
diff --git a/Documentation/serial/driver b/Documentation/serial/driver
index 87856d3cfb67..42ef9970bc86 100644
--- a/Documentation/serial/driver
+++ b/Documentation/serial/driver
@@ -116,12 +116,15 @@ hardware.
line becoming inactive or the tty layer indicating we want
to stop transmission due to an XOFF character.
+ The driver should stop transmitting characters as soon as
+ possible.
+
Locking: port->lock taken.
Interrupts: locally disabled.
This call must not sleep
start_tx(port)
- start transmitting characters.
+ Start transmitting characters.
Locking: port->lock taken.
Interrupts: locally disabled.
@@ -281,26 +284,31 @@ hardware.
Other functions
---------------
-uart_update_timeout(port,cflag,quot)
+uart_update_timeout(port,cflag,baud)
Update the FIFO drain timeout, port->timeout, according to the
- number of bits, parity, stop bits and quotient.
+ number of bits, parity, stop bits and baud rate.
Locking: caller is expected to take port->lock
Interrupts: n/a
-uart_get_baud_rate(port,termios)
+uart_get_baud_rate(port,termios,old,min,max)
Return the numeric baud rate for the specified termios, taking
account of the special 38400 baud "kludge". The B0 baud rate
is mapped to 9600 baud.
+ If the baud rate is not within min..max, then if old is non-NULL,
+ the original baud rate will be tried. If that exceeds the
+ min..max constraint, 9600 baud will be returned. termios will
+ be updated to the baud rate in use.
+
+ Note: min..max must always allow 9600 baud to be selected.
+
Locking: caller dependent.
Interrupts: n/a
-uart_get_divisor(port,termios,oldtermios)
- Return the divsor (baud_base / baud) for the selected baud rate
- specified by termios. If the baud rate is out of range, try
- the original baud rate specified by oldtermios (if non-NULL).
- If that fails, try 9600 baud.
+uart_get_divisor(port,baud)
+ Return the divsor (baud_base / baud) for the specified baud
+ rate, appropriately rounded.
If 38400 baud and custom divisor is selected, return the
custom divisor instead.
@@ -308,6 +316,46 @@ uart_get_divisor(port,termios,oldtermios)
Locking: caller dependent.
Interrupts: n/a
+uart_match_port(port1,port2)
+ This utility function can be used to determine whether two
+ uart_port structures describe the same port.
+
+ Locking: n/a
+ Interrupts: n/a
+
+uart_write_wakeup(port)
+ A driver is expected to call this function when the number of
+ characters in the transmit buffer have dropped below a threshold.
+
+ Locking: port->lock should be held.
+ Interrupts: n/a
+
+uart_register_driver(drv)
+ Register a uart driver with the core driver. We in turn register
+ with the tty layer, and initialise the core driver per-port state.
+
+ drv->port should be NULL, and the per-port structures should be
+ registered using uart_add_one_port after this call has succeeded.
+
+ Locking: none
+ Interrupts: enabled
+
+uart_unregister_driver()
+ Remove all references to a driver from the core driver. The low
+ level driver must have removed all its ports via the
+ uart_remove_one_port() if it registered them with uart_add_one_port().
+
+ Locking: none
+ Interrupts: enabled
+
+uart_suspend_port()
+
+uart_resume_port()
+
+uart_add_one_port()
+
+uart_remove_one_port()
+
Other notes
-----------
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
index 401d94a7fe2e..0745ce782974 100644
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -1967,7 +1967,9 @@ uart_report_port(struct uart_driver *drv, struct uart_port *port)
break;
}
- printk(KERN_INFO "%s%d at %s (irq = %d) is a %s\n",
+ printk(KERN_INFO "%s%s%s%d at %s (irq = %d) is a %s\n",
+ port->dev ? port->dev->bus_id : "",
+ port->dev ? ": " : "",
drv->dev_name, port->line, address, port->irq, uart_type(port));
}
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 2b0401b93f2b..9d2579230689 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -39,8 +39,7 @@
#define PORT_RSA 13
#define PORT_NS16550A 14
#define PORT_XSCALE 15
-#define PORT_IP3106 16
-#define PORT_MAX_8250 16 /* max port ID */
+#define PORT_MAX_8250 15 /* max port ID */
/*
* ARM specific type numbers. These are not currently guaranteed
@@ -118,7 +117,9 @@
#define PORT_M32R_SIO 68
/*Digi jsm */
-#define PORT_JSM 65
+#define PORT_JSM 69
+
+#define PORT_IP3106 70
#ifdef __KERNEL__