lkml.org 
[lkml]   [2004]   [Aug]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATCH] Add sysfs support for the i8259 PIC on x86_64
From
Date

I got to looking at x86_64 and while it occasionally uses the i8259 legacy
pic it is not put in sysfs.

Here is the appropriate code ported code from i386.

diff -uNr linux-2.6.8.1-i8259-shutdown.i386/arch/x86_64/kernel/i8259.c linux-2.6.8.1-i8259-sysfs.x86_64/arch/x86_64/kernel/i8259.c
--- linux-2.6.8.1-i8259-shutdown.i386/arch/x86_64/kernel/i8259.c Wed Aug 18 14:54:30 2004
+++ linux-2.6.8.1-i8259-sysfs.x86_64/arch/x86_64/kernel/i8259.c Wed Aug 18 14:59:00 2004
@@ -342,6 +342,44 @@
}
}

+static int i8259A_resume(struct sys_device *dev)
+{
+ init_8259A(0);
+ return 0;
+}
+
+static int i8259A_shutdown(struct sys_device *dev)
+{
+ /* Put the i8259A into a quiescent state that
+ * the kernel initialization code can get it
+ * out of.
+ */
+ outb(0xff, 0x21); /* mask all of 8259A-1 */
+ outb(0xff, 0xA1); /* mask all of 8259A-1 */
+ return 0;
+}
+
+static struct sysdev_class i8259_sysdev_class = {
+ set_kset_name("i8259"),
+ .resume = i8259A_resume,
+ .shutdown = i8259A_shutdown,
+};
+
+static struct sys_device device_i8259A = {
+ .id = 0,
+ .cls = &i8259_sysdev_class,
+};
+
+static int __init i8259A_init_sysfs(void)
+{
+ int error = sysdev_class_register(&i8259_sysdev_class);
+ if (!error)
+ error = sysdev_register(&device_i8259A);
+ return error;
+}
+
+device_initcall(i8259A_init_sysfs);
+
void __init init_8259A(int auto_eoi)
{
unsigned long flags;
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2005-03-22 14:05    [W:0.029 / U:1.896 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site