|
|
@@ -0,0 +1,129 @@
|
|
|
+/*
|
|
|
+ * output.c - Display Output Switch driver
|
|
|
+ *
|
|
|
+ * Copyright (C) 2006 Luming Yu <luming.yu@intel.com>
|
|
|
+ *
|
|
|
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
+ *
|
|
|
+ * 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.
|
|
|
+ *
|
|
|
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
+ */
|
|
|
+#include <linux/module.h>
|
|
|
+#include <linux/video_output.h>
|
|
|
+#include <linux/err.h>
|
|
|
+#include <linux/ctype.h>
|
|
|
+
|
|
|
+
|
|
|
+MODULE_DESCRIPTION("Display Output Switcher Lowlevel Control Abstraction");
|
|
|
+MODULE_LICENSE("GPL");
|
|
|
+MODULE_AUTHOR("Luming Yu <luming.yu@intel.com>");
|
|
|
+
|
|
|
+static ssize_t video_output_show_state(struct class_device *dev,char *buf)
|
|
|
+{
|
|
|
+ ssize_t ret_size = 0;
|
|
|
+ struct output_device *od = to_output_device(dev);
|
|
|
+ if (od->props)
|
|
|
+ ret_size = sprintf(buf,"%.8x\n",od->props->get_status(od));
|
|
|
+ return ret_size;
|
|
|
+}
|
|
|
+
|
|
|
+static ssize_t video_output_store_state(struct class_device *dev,
|
|
|
+ const char *buf,size_t count)
|
|
|
+{
|
|
|
+ char *endp;
|
|
|
+ struct output_device *od = to_output_device(dev);
|
|
|
+ int request_state = simple_strtoul(buf,&endp,0);
|
|
|
+ size_t size = endp - buf;
|
|
|
+
|
|
|
+ if (*endp && isspace(*endp))
|
|
|
+ size++;
|
|
|
+ if (size != count)
|
|
|
+ return -EINVAL;
|
|
|
+
|
|
|
+ if (od->props) {
|
|
|
+ od->request_state = request_state;
|
|
|
+ od->props->set_state(od);
|
|
|
+ }
|
|
|
+ return count;
|
|
|
+}
|
|
|
+
|
|
|
+static void video_output_class_release(struct class_device *dev)
|
|
|
+{
|
|
|
+ struct output_device *od = to_output_device(dev);
|
|
|
+ kfree(od);
|
|
|
+}
|
|
|
+
|
|
|
+static struct class_device_attribute video_output_attributes[] = {
|
|
|
+ __ATTR(state, 0644, video_output_show_state, video_output_store_state),
|
|
|
+ __ATTR_NULL,
|
|
|
+};
|
|
|
+
|
|
|
+static struct class video_output_class = {
|
|
|
+ .name = "video_output",
|
|
|
+ .release = video_output_class_release,
|
|
|
+ .class_dev_attrs = video_output_attributes,
|
|
|
+};
|
|
|
+
|
|
|
+struct output_device *video_output_register(const char *name,
|
|
|
+ struct device *dev,
|
|
|
+ void *devdata,
|
|
|
+ struct output_properties *op)
|
|
|
+{
|
|
|
+ struct output_device *new_dev;
|
|
|
+ int ret_code = 0;
|
|
|
+
|
|
|
+ new_dev = kzalloc(sizeof(struct output_device),GFP_KERNEL);
|
|
|
+ if (!new_dev) {
|
|
|
+ ret_code = -ENOMEM;
|
|
|
+ goto error_return;
|
|
|
+ }
|
|
|
+ new_dev->props = op;
|
|
|
+ new_dev->class_dev.class = &video_output_class;
|
|
|
+ new_dev->class_dev.dev = dev;
|
|
|
+ strlcpy(new_dev->class_dev.class_id,name,KOBJ_NAME_LEN);
|
|
|
+ class_set_devdata(&new_dev->class_dev,devdata);
|
|
|
+ ret_code = class_device_register(&new_dev->class_dev);
|
|
|
+ if (ret_code) {
|
|
|
+ kfree(new_dev);
|
|
|
+ goto error_return;
|
|
|
+ }
|
|
|
+ return new_dev;
|
|
|
+
|
|
|
+error_return:
|
|
|
+ return ERR_PTR(ret_code);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(video_output_register);
|
|
|
+
|
|
|
+void video_output_unregister(struct output_device *dev)
|
|
|
+{
|
|
|
+ if (!dev)
|
|
|
+ return;
|
|
|
+ class_device_unregister(&dev->class_dev);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(video_output_unregister);
|
|
|
+
|
|
|
+static void __exit video_output_class_exit(void)
|
|
|
+{
|
|
|
+ class_unregister(&video_output_class);
|
|
|
+}
|
|
|
+
|
|
|
+static int __init video_output_class_init(void)
|
|
|
+{
|
|
|
+ return class_register(&video_output_class);
|
|
|
+}
|
|
|
+
|
|
|
+postcore_initcall(video_output_class_init);
|
|
|
+module_exit(video_output_class_exit);
|
Len Brown