tty: move drivers/serial/ to drivers/tty/serial/
The serial drivers are really just tty drivers, so move them to drivers/tty/ to make things a bit neater overall. This is part of the tty/serial driver movement proceedure as proposed by Arnd Bergmann and approved by everyone involved a number of months ago. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Rogier Wolff <R.E.Wolff@bitwizard.nl> Cc: Michael H. Warfield <mhw@wittsend.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman
201
drivers/tty/serial/of_serial.c
Normal file
201
drivers/tty/serial/of_serial.c
Normal file
@@ -0,0 +1,201 @@
|
||||
/*
|
||||
* Serial Port driver for Open Firmware platform devices
|
||||
*
|
||||
* Copyright (C) 2006 Arnd Bergmann <arnd@arndb.de>, IBM Corp.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; either version
|
||||
* 2 of the License, or (at your option) any later version.
|
||||
*
|
||||
*/
|
||||
#include <linux/init.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/serial_core.h>
|
||||
#include <linux/serial_8250.h>
|
||||
#include <linux/of_address.h>
|
||||
#include <linux/of_irq.h>
|
||||
#include <linux/of_platform.h>
|
||||
#include <linux/nwpserial.h>
|
||||
|
||||
struct of_serial_info {
|
||||
int type;
|
||||
int line;
|
||||
};
|
||||
|
||||
/*
|
||||
* Fill a struct uart_port for a given device node
|
||||
*/
|
||||
static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
|
||||
int type, struct uart_port *port)
|
||||
{
|
||||
struct resource resource;
|
||||
struct device_node *np = ofdev->dev.of_node;
|
||||
const __be32 *clk, *spd;
|
||||
const __be32 *prop;
|
||||
int ret, prop_size;
|
||||
|
||||
memset(port, 0, sizeof *port);
|
||||
spd = of_get_property(np, "current-speed", NULL);
|
||||
clk = of_get_property(np, "clock-frequency", NULL);
|
||||
if (!clk) {
|
||||
dev_warn(&ofdev->dev, "no clock-frequency property set\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
ret = of_address_to_resource(np, 0, &resource);
|
||||
if (ret) {
|
||||
dev_warn(&ofdev->dev, "invalid address\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
spin_lock_init(&port->lock);
|
||||
port->mapbase = resource.start;
|
||||
|
||||
/* Check for shifted address mapping */
|
||||
prop = of_get_property(np, "reg-offset", &prop_size);
|
||||
if (prop && (prop_size == sizeof(u32)))
|
||||
port->mapbase += be32_to_cpup(prop);
|
||||
|
||||
/* Check for registers offset within the devices address range */
|
||||
prop = of_get_property(np, "reg-shift", &prop_size);
|
||||
if (prop && (prop_size == sizeof(u32)))
|
||||
port->regshift = be32_to_cpup(prop);
|
||||
|
||||
port->irq = irq_of_parse_and_map(np, 0);
|
||||
port->iotype = UPIO_MEM;
|
||||
port->type = type;
|
||||
port->uartclk = be32_to_cpup(clk);
|
||||
port->flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_IOREMAP
|
||||
| UPF_FIXED_PORT | UPF_FIXED_TYPE;
|
||||
port->dev = &ofdev->dev;
|
||||
/* If current-speed was set, then try not to change it. */
|
||||
if (spd)
|
||||
port->custom_divisor = be32_to_cpup(clk) / (16 * (be32_to_cpup(spd)));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Try to register a serial port
|
||||
*/
|
||||
static int __devinit of_platform_serial_probe(struct platform_device *ofdev,
|
||||
const struct of_device_id *id)
|
||||
{
|
||||
struct of_serial_info *info;
|
||||
struct uart_port port;
|
||||
int port_type;
|
||||
int ret;
|
||||
|
||||
if (of_find_property(ofdev->dev.of_node, "used-by-rtas", NULL))
|
||||
return -EBUSY;
|
||||
|
||||
info = kmalloc(sizeof(*info), GFP_KERNEL);
|
||||
if (info == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
port_type = (unsigned long)id->data;
|
||||
ret = of_platform_serial_setup(ofdev, port_type, &port);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
switch (port_type) {
|
||||
#ifdef CONFIG_SERIAL_8250
|
||||
case PORT_8250 ... PORT_MAX_8250:
|
||||
ret = serial8250_register_port(&port);
|
||||
break;
|
||||
#endif
|
||||
#ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL
|
||||
case PORT_NWPSERIAL:
|
||||
ret = nwpserial_register_port(&port);
|
||||
break;
|
||||
#endif
|
||||
default:
|
||||
/* need to add code for these */
|
||||
case PORT_UNKNOWN:
|
||||
dev_info(&ofdev->dev, "Unknown serial port found, ignored\n");
|
||||
ret = -ENODEV;
|
||||
break;
|
||||
}
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
info->type = port_type;
|
||||
info->line = ret;
|
||||
dev_set_drvdata(&ofdev->dev, info);
|
||||
return 0;
|
||||
out:
|
||||
kfree(info);
|
||||
irq_dispose_mapping(port.irq);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* Release a line
|
||||
*/
|
||||
static int of_platform_serial_remove(struct platform_device *ofdev)
|
||||
{
|
||||
struct of_serial_info *info = dev_get_drvdata(&ofdev->dev);
|
||||
switch (info->type) {
|
||||
#ifdef CONFIG_SERIAL_8250
|
||||
case PORT_8250 ... PORT_MAX_8250:
|
||||
serial8250_unregister_port(info->line);
|
||||
break;
|
||||
#endif
|
||||
#ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL
|
||||
case PORT_NWPSERIAL:
|
||||
nwpserial_unregister_port(info->line);
|
||||
break;
|
||||
#endif
|
||||
default:
|
||||
/* need to add code for these */
|
||||
break;
|
||||
}
|
||||
kfree(info);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* A few common types, add more as needed.
|
||||
*/
|
||||
static struct of_device_id __devinitdata of_platform_serial_table[] = {
|
||||
{ .type = "serial", .compatible = "ns8250", .data = (void *)PORT_8250, },
|
||||
{ .type = "serial", .compatible = "ns16450", .data = (void *)PORT_16450, },
|
||||
{ .type = "serial", .compatible = "ns16550a", .data = (void *)PORT_16550A, },
|
||||
{ .type = "serial", .compatible = "ns16550", .data = (void *)PORT_16550, },
|
||||
{ .type = "serial", .compatible = "ns16750", .data = (void *)PORT_16750, },
|
||||
{ .type = "serial", .compatible = "ns16850", .data = (void *)PORT_16850, },
|
||||
#ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL
|
||||
{ .type = "serial", .compatible = "ibm,qpace-nwp-serial",
|
||||
.data = (void *)PORT_NWPSERIAL, },
|
||||
#endif
|
||||
{ .type = "serial", .data = (void *)PORT_UNKNOWN, },
|
||||
{ /* end of list */ },
|
||||
};
|
||||
|
||||
static struct of_platform_driver of_platform_serial_driver = {
|
||||
.driver = {
|
||||
.name = "of_serial",
|
||||
.owner = THIS_MODULE,
|
||||
.of_match_table = of_platform_serial_table,
|
||||
},
|
||||
.probe = of_platform_serial_probe,
|
||||
.remove = of_platform_serial_remove,
|
||||
};
|
||||
|
||||
static int __init of_platform_serial_init(void)
|
||||
{
|
||||
return of_register_platform_driver(&of_platform_serial_driver);
|
||||
}
|
||||
module_init(of_platform_serial_init);
|
||||
|
||||
static void __exit of_platform_serial_exit(void)
|
||||
{
|
||||
return of_unregister_platform_driver(&of_platform_serial_driver);
|
||||
};
|
||||
module_exit(of_platform_serial_exit);
|
||||
|
||||
MODULE_AUTHOR("Arnd Bergmann <arnd@arndb.de>");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Serial Port driver for Open Firmware platform devices");
|
||||
Reference in New Issue
Block a user