/* * 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 Asb�ck <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_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); }