1 files changed, 72 insertions, 0 deletions

diff --git a/drivers/misc/ibmasm/uart.c b/drivers/misc/ibmasm/uart.c
new file mode 100644
index 000000000000..914804512dba
--- /dev/null
+++ b/drivers/misc/ibmasm/uart.c
@@ -0,0 +1,72 @@
+
+/*
+ * 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.h>
+#include <linux/serial_reg.h>
+#include "ibmasm.h"
+#include "lowlevel.h"
+
+
+void ibmasm_register_uart(struct service_processor *sp)
+{
+        struct serial_struct serial;
+        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(&serial, 0, sizeof(serial));
+        serial.irq              = sp->irq;
+        serial.baud_base        = 3686400 / 16;
+        serial.flags            = UPF_AUTOPROBE | UPF_SHARE_IRQ;
+        serial.io_type          = UPIO_MEM;
+        serial.iomem_base       = iomem_base;
+
+        sp->serial_line = register_serial(&serial);
+        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);
+        unregister_serial(sp->serial_line);
+}