/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2007 MIPS Technologies, Inc.
* written by Ralf Baechle (ralf@linux-mips.org)
*
* Probe driver for the Malta's UART ports:
*
* o 2 ports in the SMC SuperIO
* o 1 port in the CBUS UART, a discrete 16550 which normally is only used
* for bringups.
*
* We don't use 8250_platform.c on Malta as it would result in the CBUS
* UART becoming ttyS0.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/serial_8250.h>
#define SMC_PORT(base, int) \
{ \
.iobase = base, \
.irq = int, \
.uartclk = 1843200, \
.iotype = UPIO_PORT, \
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, \
.regshift = 0, \
}
#define CBUS_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)
static struct plat_serial8250_port uart8250_data[] = {
SMC_PORT(0x3F8, 4),
SMC_PORT(0x2F8, 3),
{
.mapbase = 0x1f000900, /* The CBUS UART */
.irq = MIPS_CPU_IRQ_BASE + 2,
.uartclk = 3686400, /* Twice the usual clk! */
.iotype = UPIO_MEM32,
.flags = CBUS_UART_FLAGS,
.regshift = 3,
},
{ },
};
static struct platform_device uart8250_device = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM2,
.dev = {
.platform_data = uart8250_data,
},
};
static int __init uart8250_init(void)
{
return platform_device_register(&uart8250_device);
}
module_init(uart8250_init);
MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("8250 UART probe driver for the Malta CBUS UART");
