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From 4d5e00ec9374ddf1ec0995e10380e2e044eb8154 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Wed, 2 May 2012 21:47:27 +0900
Subject: serial8250: Introduce serial8250_register_8250_port()
Introduce yet another 8250 registration function.
This time it is serial8250_register_8250_port() and it
allows us to register 8250 hardware instances using struct
uart_8250_port. The new function makes it possible to
register 8250 hardware that makes use of 8250 specific
callbacks such as ->dl_read() and ->dl_write().
Signed-off-by: Magnus Damm <damm@opensource.se>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit f73fa05b90eb8c0dd3230c364cf1107f4f8f3848)
Conflicts:
drivers/tty/serial/8250/8250.c
Signed-off-by: Simon Horman <horms@verge.net.au>
---
drivers/tty/serial/8250/8250.c | 87 ++++++++++++++++++++++++++--------------
include/linux/serial_8250.h | 1 +
2 files changed, 58 insertions(+), 30 deletions(-)
diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c
index 3445a27..8de9a39 100644
--- a/drivers/tty/serial/8250/8250.c
+++ b/drivers/tty/serial/8250/8250.c
@@ -3132,7 +3132,7 @@ static struct uart_8250_port *serial8250_find_match_or_unused(struct uart_port *
}
/**
- * serial8250_register_port - register a serial port
+ * serial8250_register_8250_port - register a serial port
* @port: serial port template
*
* Configure the serial port specified by the request. If the
@@ -3144,50 +3144,54 @@ static struct uart_8250_port *serial8250_find_match_or_unused(struct uart_port *
*
* On success the port is ready to use and the line number is returned.
*/
-int serial8250_register_port(struct uart_port *port)
+int serial8250_register_8250_port(struct uart_8250_port *up)
{
struct uart_8250_port *uart;
int ret = -ENOSPC;
- if (port->uartclk == 0)
+ if (up->port.uartclk == 0)
return -EINVAL;
mutex_lock(&serial_mutex);
- uart = serial8250_find_match_or_unused(port);
+ uart = serial8250_find_match_or_unused(&up->port);
if (uart) {
uart_remove_one_port(&serial8250_reg, &uart->port);
- uart->port.iobase = port->iobase;
- uart->port.membase = port->membase;
- uart->port.irq = port->irq;
- uart->port.irqflags = port->irqflags;
- uart->port.uartclk = port->uartclk;
- uart->port.fifosize = port->fifosize;
- uart->port.regshift = port->regshift;
- uart->port.iotype = port->iotype;
- uart->port.flags = port->flags | UPF_BOOT_AUTOCONF;
- uart->port.mapbase = port->mapbase;
- uart->port.private_data = port->private_data;
- if (port->dev)
- uart->port.dev = port->dev;
-
- if (port->flags & UPF_FIXED_TYPE)
- serial8250_init_fixed_type_port(uart, port->type);
+ uart->port.iobase = up->port.iobase;
+ uart->port.membase = up->port.membase;
+ uart->port.irq = up->port.irq;
+ uart->port.irqflags = up->port.irqflags;
+ uart->port.uartclk = up->port.uartclk;
+ uart->port.fifosize = up->port.fifosize;
+ uart->port.regshift = up->port.regshift;
+ uart->port.iotype = up->port.iotype;
+ uart->port.flags = up->port.flags | UPF_BOOT_AUTOCONF;
+ uart->port.mapbase = up->port.mapbase;
+ uart->port.private_data = up->port.private_data;
+ if (up->port.dev)
+ uart->port.dev = up->port.dev;
+
+ if (up->port.flags & UPF_FIXED_TYPE)
+ serial8250_init_fixed_type_port(uart, up->port.type);
set_io_from_upio(&uart->port);
/* Possibly override default I/O functions. */
- if (port->serial_in)
- uart->port.serial_in = port->serial_in;
- if (port->serial_out)
- uart->port.serial_out = port->serial_out;
- if (port->handle_irq)
- uart->port.handle_irq = port->handle_irq;
+ if (up->port.serial_in)
+ uart->port.serial_in = up->port.serial_in;
+ if (up->port.serial_out)
+ uart->port.serial_out = up->port.serial_out;
+ if (up->port.handle_irq)
+ uart->port.handle_irq = up->port.handle_irq;
/* Possibly override set_termios call */
- if (port->set_termios)
- uart->port.set_termios = port->set_termios;
- if (port->pm)
- uart->port.pm = port->pm;
+ if (up->port.set_termios)
+ uart->port.set_termios = up->port.set_termios;
+ if (up->port.pm)
+ uart->port.pm = up->port.pm;
+ if (up->dl_read)
+ uart->dl_read = up->dl_read;
+ if (up->dl_write)
+ uart->dl_write = up->dl_write;
if (serial8250_isa_config != NULL)
serial8250_isa_config(0, &uart->port,
@@ -3201,6 +3205,29 @@ int serial8250_register_port(struct uart_port *port)
return ret;
}
+EXPORT_SYMBOL(serial8250_register_8250_port);
+
+/**
+ * serial8250_register_port - register a serial port
+ * @port: serial port template
+ *
+ * Configure the serial port specified by the request. If the
+ * port exists and is in use, it is hung up and unregistered
+ * first.
+ *
+ * The port is then probed and if necessary the IRQ is autodetected
+ * If this fails an error is returned.
+ *
+ * On success the port is ready to use and the line number is returned.
+ */
+int serial8250_register_port(struct uart_port *port)
+{
+ struct uart_8250_port up;
+
+ memset(&up, 0, sizeof(up));
+ memcpy(&up.port, port, sizeof(*port));
+ return serial8250_register_8250_port(&up);
+}
EXPORT_SYMBOL(serial8250_register_port);
/**
diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
index b44034e..d7f286e 100644
--- a/include/linux/serial_8250.h
+++ b/include/linux/serial_8250.h
@@ -68,6 +68,7 @@ enum {
struct uart_port;
struct uart_8250_port;
+int serial8250_register_8250_port(struct uart_8250_port *);
int serial8250_register_port(struct uart_port *);
void serial8250_unregister_port(int line);
void serial8250_suspend_port(int line);
--
1.7.10.1.362.g242cab3
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