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/*
* IBM ASM Service Processor Device Driver
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Copyright (C) IBM Corporation, 2004
*
* Author: Max Asböck <amax@us.ibm.com>
*
*/
#include <linux/termios.h>
#include <linux/tty.h>
#include <linux/serial_core.h>
#include <linux/serial_reg.h>
#include <linux/serial_8250.h>
#include "ibmasm.h"
#include "lowlevel.h"
void ibmasm_register_uart(struct service_processor *sp)
{
struct uart_port uport;
void __iomem *iomem_base;
iomem_base = sp->base_address + SCOUT_COM_B_BASE;
/* read the uart scratch register to determine if the UART
* is dedicated to the service processor or if the OS can use it
*/
if (0 == readl(iomem_base + UART_SCR)) {
dev_info(sp->dev, "IBM SP UART not registered, owned by service processor\n");
sp->serial_line = -1;
return;
}
memset(&uport, 0, sizeof(struct uart_port));
uport.irq = sp->irq;
uport.uartclk = 3686400;
uport.flags = UPF_AUTOPROBE | UPF_SHARE_IRQ;
uport.iotype = UPIO_MEM;
uport.membase = iomem_base;
sp->serial_line = serial8250_register_port(&uport);
if (sp->serial_line < 0) {
dev_err(sp->dev, "Failed to register serial port\n");
return;
}
enable_uart_interrupts(sp->base_address);
}
void ibmasm_unregister_uart(struct service_processor *sp)
{
if (sp->serial_line < 0)
return;
disable_uart_interrupts(sp->base_address);
serial8250_unregister_port(sp->serial_line);
}
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