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authorIan Wisbon <ian.wisbon@timesys.com>2011-02-10 17:15:15 -0500
committerIan Wisbon <ian.wisbon@timesys.com>2011-02-14 14:29:06 -0500
commit14a4057959f8ee0a2249eb2abd64fd6b1f571d98 (patch)
tree6df655a665a5a56bd6b7cae5e2689fc5a1b6c965 /drivers/misc/fsl_cache.c
parent0eb553bf96e2c990d3bfccaa07da0863624c89ab (diff)
Digi Release Code - 02142011 Missing Files Fix2.6.31-digi-201102141503
Diffstat (limited to 'drivers/misc/fsl_cache.c')
-rw-r--r--drivers/misc/fsl_cache.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/drivers/misc/fsl_cache.c b/drivers/misc/fsl_cache.c
new file mode 100644
index 000000000000..3101aef60833
--- /dev/null
+++ b/drivers/misc/fsl_cache.c
@@ -0,0 +1,85 @@
+/*
+ * fsl_cache.c -- freescale cache driver
+ *
+ * Copyright 2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/uaccess.h>
+#include <linux/fsl_cache.h>
+
+#include <asm/cacheflush.h>
+
+
+static int fsl_cache_ioctl(struct inode *ip, struct file *fp,
+ unsigned int cmd, unsigned long arg)
+{
+ struct fsl_cache_addr addr;
+ if (copy_from_user(&addr, (void __user *)arg,
+ sizeof(struct fsl_cache_addr))) {
+ printk(KERN_ERR "fsl_cache_ioctl failed!\n");
+ return -EFAULT;
+ }
+
+ if (addr.start <= 0 || addr.end <= addr.start)
+ return -EINVAL;
+
+ switch (cmd) {
+ case FSLCACHE_IOCINV:
+ dmac_inv_range(addr.start, addr.end);
+ break;
+ case FSLCACHE_IOCCLEAN:
+ dmac_clean_range(addr.start, addr.end);
+ break;
+ case FSLCACHE_IOCFLUSH:
+ dmac_flush_range(addr.start, addr.end);
+ break;
+ default:
+ printk(KERN_ERR "fsl_cache ioctl: error cmd!\n");
+ return -1;
+ }
+ return 0;
+}
+
+static const struct file_operations misc_fops = {
+ .ioctl = fsl_cache_ioctl,
+};
+
+static struct miscdevice fsl_cache_device = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "fsl_cache",
+ .fops = &misc_fops,
+};
+
+static int __init fsl_cache_init(void)
+{
+ int error;
+
+ error = misc_register(&fsl_cache_device);
+ if (error) {
+ printk(KERN_ERR "fsl_cache: misc_register failed!\n");
+ return error;
+ }
+ return 0;
+}
+
+static void __exit fsl_cache_exit(void)
+{
+ misc_deregister(&fsl_cache_device);
+}
+
+module_init(fsl_cache_init);
+module_exit(fsl_cache_exit);
+
+MODULE_DESCRIPTION("Freescale cache manipulation driver");
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_LICENSE("GPL");