73 lines
2 KiB
C
73 lines
2 KiB
C
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/*
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* IBM ASM Service Processor Device Driver
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* Copyright (C) IBM Corporation, 2004
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*
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* Author: Max Asböck <amax@us.ibm.com>
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*
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*/
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#include <linux/termios.h>
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#include <linux/tty.h>
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#include <linux/serial_core.h>
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#include <linux/serial_reg.h>
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#include <linux/serial_8250.h>
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#include "ibmasm.h"
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#include "lowlevel.h"
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void ibmasm_register_uart(struct service_processor *sp)
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{
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struct uart_8250_port uart;
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void __iomem *iomem_base;
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iomem_base = sp->base_address + SCOUT_COM_B_BASE;
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/* read the uart scratch register to determine if the UART
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* is dedicated to the service processor or if the OS can use it
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*/
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if (0 == readl(iomem_base + UART_SCR)) {
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dev_info(sp->dev, "IBM SP UART not registered, owned by service processor\n");
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sp->serial_line = -1;
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return;
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}
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memset(&uart, 0, sizeof(uart));
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uart.port.irq = sp->irq;
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uart.port.uartclk = 3686400;
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uart.port.flags = UPF_SHARE_IRQ;
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uart.port.iotype = UPIO_MEM;
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uart.port.membase = iomem_base;
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sp->serial_line = serial8250_register_8250_port(&uart);
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if (sp->serial_line < 0) {
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dev_err(sp->dev, "Failed to register serial port\n");
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return;
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}
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enable_uart_interrupts(sp->base_address);
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}
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void ibmasm_unregister_uart(struct service_processor *sp)
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{
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if (sp->serial_line < 0)
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return;
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disable_uart_interrupts(sp->base_address);
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serial8250_unregister_port(sp->serial_line);
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}
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