init android origin source code

1 files changed, 574 insertions, 0 deletions

diff --git a/ANDROID_3.4.5/drivers/video/fbsysfs.c b/ANDROID_3.4.5/drivers/video/fbsysfs.c
new file mode 100644
index 00000000..67afa9c2
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/video/fbsysfs.c
@@ -0,0 +1,574 @@
+/*
+ * fbsysfs.c - framebuffer device class and attributes
+ *
+ * Copyright (c) 2004 James Simmons <jsimmons@infradead.org>
+ * 
+ *	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.
+ */
+
+/*
+ * Note:  currently there's only stubs for framebuffer_alloc and
+ * framebuffer_release here.  The reson for that is that until all drivers
+ * are converted to use it a sysfsification will open OOPSable races.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fb.h>
+#include <linux/console.h>
+#include <linux/module.h>
+
+#define FB_SYSFS_FLAG_ATTR 1
+
+/**
+ * framebuffer_alloc - creates a new frame buffer info structure
+ *
+ * @size: size of driver private data, can be zero
+ * @dev: pointer to the device for this fb, this can be NULL
+ *
+ * Creates a new frame buffer info structure. Also reserves @size bytes
+ * for driver private data (info->par). info->par (if any) will be
+ * aligned to sizeof(long).
+ *
+ * Returns the new structure, or NULL if an error occurred.
+ *
+ */
+struct fb_info *framebuffer_alloc(size_t size, struct device *dev)
+{
+#define BYTES_PER_LONG (BITS_PER_LONG/8)
+#define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
+	int fb_info_size = sizeof(struct fb_info);
+	struct fb_info *info;
+	char *p;
+
+	if (size)
+		fb_info_size += PADDING;
+
+	p = kzalloc(fb_info_size + size, GFP_KERNEL);
+
+	if (!p)
+		return NULL;
+
+	info = (struct fb_info *) p;
+
+	if (size)
+		info->par = p + fb_info_size;
+
+	info->device = dev;
+
+#ifdef CONFIG_FB_BACKLIGHT
+	mutex_init(&info->bl_curve_mutex);
+#endif
+
+	return info;
+#undef PADDING
+#undef BYTES_PER_LONG
+}
+EXPORT_SYMBOL(framebuffer_alloc);
+
+/**
+ * framebuffer_release - marks the structure available for freeing
+ *
+ * @info: frame buffer info structure
+ *
+ * Drop the reference count of the device embedded in the
+ * framebuffer info structure.
+ *
+ */
+void framebuffer_release(struct fb_info *info)
+{
+	kfree(info->apertures);
+	kfree(info);
+}
+EXPORT_SYMBOL(framebuffer_release);
+
+static int activate(struct fb_info *fb_info, struct fb_var_screeninfo *var)
+{
+	int err;
+
+	var->activate |= FB_ACTIVATE_FORCE;
+	console_lock();
+	fb_info->flags |= FBINFO_MISC_USEREVENT;
+	err = fb_set_var(fb_info, var);
+	fb_info->flags &= ~FBINFO_MISC_USEREVENT;
+	console_unlock();
+	if (err)
+		return err;
+	return 0;
+}
+
+static int mode_string(char *buf, unsigned int offset,
+		       const struct fb_videomode *mode)
+{
+	char m = 'U';
+	char v = 'p';
+
+	if (mode->flag & FB_MODE_IS_DETAILED)
+		m = 'D';
+	if (mode->flag & FB_MODE_IS_VESA)
+		m = 'V';
+	if (mode->flag & FB_MODE_IS_STANDARD)
+		m = 'S';
+
+	if (mode->vmode & FB_VMODE_INTERLACED)
+		v = 'i';
+	if (mode->vmode & FB_VMODE_DOUBLE)
+		v = 'd';
+
+	return snprintf(&buf[offset], PAGE_SIZE - offset, "%c:%dx%d%c-%d\n",
+	                m, mode->xres, mode->yres, v, mode->refresh);
+}
+
+static ssize_t store_mode(struct device *device, struct device_attribute *attr,
+			  const char *buf, size_t count)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+	char mstr[100];
+	struct fb_var_screeninfo var;
+	struct fb_modelist *modelist;
+	struct fb_videomode *mode;
+	struct list_head *pos;
+	size_t i;
+	int err;
+
+	memset(&var, 0, sizeof(var));
+
+	list_for_each(pos, &fb_info->modelist) {
+		modelist = list_entry(pos, struct fb_modelist, list);
+		mode = &modelist->mode;
+		i = mode_string(mstr, 0, mode);
+		if (strncmp(mstr, buf, max(count, i)) == 0) {
+
+			var = fb_info->var;
+			fb_videomode_to_var(&var, mode);
+			if ((err = activate(fb_info, &var)))
+				return err;
+			fb_info->mode = mode;
+			return count;
+		}
+	}
+	return -EINVAL;
+}
+
+static ssize_t show_mode(struct device *device, struct device_attribute *attr,
+			 char *buf)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+
+	if (!fb_info->mode)
+		return 0;
+
+	return mode_string(buf, 0, fb_info->mode);
+}
+
+static ssize_t store_modes(struct device *device,
+			   struct device_attribute *attr,
+			   const char *buf, size_t count)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+	LIST_HEAD(old_list);
+	int i = count / sizeof(struct fb_videomode);
+
+	if (i * sizeof(struct fb_videomode) != count)
+		return -EINVAL;
+
+	console_lock();
+	list_splice(&fb_info->modelist, &old_list);
+	fb_videomode_to_modelist((const struct fb_videomode *)buf, i,
+				 &fb_info->modelist);
+	if (fb_new_modelist(fb_info)) {
+		fb_destroy_modelist(&fb_info->modelist);
+		list_splice(&old_list, &fb_info->modelist);
+	} else
+		fb_destroy_modelist(&old_list);
+
+	console_unlock();
+
+	return 0;
+}
+
+static ssize_t show_modes(struct device *device, struct device_attribute *attr,
+			  char *buf)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+	unsigned int i;
+	struct list_head *pos;
+	struct fb_modelist *modelist;
+	const struct fb_videomode *mode;
+
+	i = 0;
+	list_for_each(pos, &fb_info->modelist) {
+		modelist = list_entry(pos, struct fb_modelist, list);
+		mode = &modelist->mode;
+		i += mode_string(buf, i, mode);
+	}
+	return i;
+}
+
+static ssize_t store_bpp(struct device *device, struct device_attribute *attr,
+			 const char *buf, size_t count)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+	struct fb_var_screeninfo var;
+	char ** last = NULL;
+	int err;
+
+	var = fb_info->var;
+	var.bits_per_pixel = simple_strtoul(buf, last, 0);
+	if ((err = activate(fb_info, &var)))
+		return err;
+	return count;
+}
+
+static ssize_t show_bpp(struct device *device, struct device_attribute *attr,
+			char *buf)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+	return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->var.bits_per_pixel);
+}
+
+static ssize_t store_rotate(struct device *device,
+			    struct device_attribute *attr,
+			    const char *buf, size_t count)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+	struct fb_var_screeninfo var;
+	char **last = NULL;
+	int err;
+
+	var = fb_info->var;
+	var.rotate = simple_strtoul(buf, last, 0);
+
+	if ((err = activate(fb_info, &var)))
+		return err;
+
+	return count;
+}
+
+
+static ssize_t show_rotate(struct device *device,
+			   struct device_attribute *attr, char *buf)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+
+	return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->var.rotate);
+}
+
+static ssize_t store_virtual(struct device *device,
+			     struct device_attribute *attr,
+			     const char *buf, size_t count)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+	struct fb_var_screeninfo var;
+	char *last = NULL;
+	int err;
+
+	var = fb_info->var;
+	var.xres_virtual = simple_strtoul(buf, &last, 0);
+	last++;
+	if (last - buf >= count)
+		return -EINVAL;
+	var.yres_virtual = simple_strtoul(last, &last, 0);
+
+	if ((err = activate(fb_info, &var)))
+		return err;
+	return count;
+}
+
+static ssize_t show_virtual(struct device *device,
+			    struct device_attribute *attr, char *buf)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+	return snprintf(buf, PAGE_SIZE, "%d,%d\n", fb_info->var.xres_virtual,
+			fb_info->var.yres_virtual);
+}
+
+static ssize_t show_stride(struct device *device,
+			   struct device_attribute *attr, char *buf)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+	return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->fix.line_length);
+}
+
+static ssize_t store_blank(struct device *device,
+			   struct device_attribute *attr,
+			   const char *buf, size_t count)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+	char *last = NULL;
+	int err;
+
+	console_lock();
+	fb_info->flags |= FBINFO_MISC_USEREVENT;
+	err = fb_blank(fb_info, simple_strtoul(buf, &last, 0));
+	fb_info->flags &= ~FBINFO_MISC_USEREVENT;
+	console_unlock();
+	if (err < 0)
+		return err;
+	return count;
+}
+
+static ssize_t show_blank(struct device *device,
+			  struct device_attribute *attr, char *buf)
+{
+//	struct fb_info *fb_info = dev_get_drvdata(device);
+	return 0;
+}
+
+static ssize_t store_console(struct device *device,
+			     struct device_attribute *attr,
+			     const char *buf, size_t count)
+{
+//	struct fb_info *fb_info = dev_get_drvdata(device);
+	return 0;
+}
+
+static ssize_t show_console(struct device *device,
+			    struct device_attribute *attr, char *buf)
+{
+//	struct fb_info *fb_info = dev_get_drvdata(device);
+	return 0;
+}
+
+static ssize_t store_cursor(struct device *device,
+			    struct device_attribute *attr,
+			    const char *buf, size_t count)
+{
+//	struct fb_info *fb_info = dev_get_drvdata(device);
+	return 0;
+}
+
+static ssize_t show_cursor(struct device *device,
+			   struct device_attribute *attr, char *buf)
+{
+//	struct fb_info *fb_info = dev_get_drvdata(device);
+	return 0;
+}
+
+static ssize_t store_pan(struct device *device,
+			 struct device_attribute *attr,
+			 const char *buf, size_t count)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+	struct fb_var_screeninfo var;
+	char *last = NULL;
+	int err;
+
+	var = fb_info->var;
+	var.xoffset = simple_strtoul(buf, &last, 0);
+	last++;
+	if (last - buf >= count)
+		return -EINVAL;
+	var.yoffset = simple_strtoul(last, &last, 0);
+
+	console_lock();
+	err = fb_pan_display(fb_info, &var);
+	console_unlock();
+
+	if (err < 0)
+		return err;
+	return count;
+}
+
+static ssize_t show_pan(struct device *device,
+			struct device_attribute *attr, char *buf)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+	return snprintf(buf, PAGE_SIZE, "%d,%d\n", fb_info->var.xoffset,
+			fb_info->var.yoffset);
+}
+
+static ssize_t show_name(struct device *device,
+			 struct device_attribute *attr, char *buf)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+
+	return snprintf(buf, PAGE_SIZE, "%s\n", fb_info->fix.id);
+}
+
+static ssize_t store_fbstate(struct device *device,
+			     struct device_attribute *attr,
+			     const char *buf, size_t count)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+	u32 state;
+	char *last = NULL;
+
+	state = simple_strtoul(buf, &last, 0);
+
+	if (!lock_fb_info(fb_info))
+		return -ENODEV;
+	console_lock();
+	fb_set_suspend(fb_info, (int)state);
+	console_unlock();
+	unlock_fb_info(fb_info);
+
+	return count;
+}
+
+static ssize_t show_fbstate(struct device *device,
+			    struct device_attribute *attr, char *buf)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+	return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->state);
+}
+
+#ifdef CONFIG_FB_BACKLIGHT
+static ssize_t store_bl_curve(struct device *device,
+			      struct device_attribute *attr,
+			      const char *buf, size_t count)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+	u8 tmp_curve[FB_BACKLIGHT_LEVELS];
+	unsigned int i;
+
+	/* Some drivers don't use framebuffer_alloc(), but those also
+	 * don't have backlights.
+	 */
+	if (!fb_info || !fb_info->bl_dev)
+		return -ENODEV;
+
+	if (count != (FB_BACKLIGHT_LEVELS / 8 * 24))
+		return -EINVAL;
+
+	for (i = 0; i < (FB_BACKLIGHT_LEVELS / 8); ++i)
+		if (sscanf(&buf[i * 24],
+			"%2hhx %2hhx %2hhx %2hhx %2hhx %2hhx %2hhx %2hhx\n",
+			&tmp_curve[i * 8 + 0],
+			&tmp_curve[i * 8 + 1],
+			&tmp_curve[i * 8 + 2],
+			&tmp_curve[i * 8 + 3],
+			&tmp_curve[i * 8 + 4],
+			&tmp_curve[i * 8 + 5],
+			&tmp_curve[i * 8 + 6],
+			&tmp_curve[i * 8 + 7]) != 8)
+			return -EINVAL;
+
+	/* If there has been an error in the input data, we won't
+	 * reach this loop.
+	 */
+	mutex_lock(&fb_info->bl_curve_mutex);
+	for (i = 0; i < FB_BACKLIGHT_LEVELS; ++i)
+		fb_info->bl_curve[i] = tmp_curve[i];
+	mutex_unlock(&fb_info->bl_curve_mutex);
+
+	return count;
+}
+
+static ssize_t show_bl_curve(struct device *device,
+			     struct device_attribute *attr, char *buf)
+{
+	struct fb_info *fb_info = dev_get_drvdata(device);
+	ssize_t len = 0;
+	unsigned int i;
+
+	/* Some drivers don't use framebuffer_alloc(), but those also
+	 * don't have backlights.
+	 */
+	if (!fb_info || !fb_info->bl_dev)
+		return -ENODEV;
+
+	mutex_lock(&fb_info->bl_curve_mutex);
+	for (i = 0; i < FB_BACKLIGHT_LEVELS; i += 8)
+		len += snprintf(&buf[len], PAGE_SIZE,
+				"%02x %02x %02x %02x %02x %02x %02x %02x\n",
+				fb_info->bl_curve[i + 0],
+				fb_info->bl_curve[i + 1],
+				fb_info->bl_curve[i + 2],
+				fb_info->bl_curve[i + 3],
+				fb_info->bl_curve[i + 4],
+				fb_info->bl_curve[i + 5],
+				fb_info->bl_curve[i + 6],
+				fb_info->bl_curve[i + 7]);
+	mutex_unlock(&fb_info->bl_curve_mutex);
+
+	return len;
+}
+#endif
+
+/* When cmap is added back in it should be a binary attribute
+ * not a text one. Consideration should also be given to converting
+ * fbdev to use configfs instead of sysfs */
+static struct device_attribute device_attrs[] = {
+	__ATTR(bits_per_pixel, S_IRUGO|S_IWUSR, show_bpp, store_bpp),
+	__ATTR(blank, S_IRUGO|S_IWUSR, show_blank, store_blank),
+	__ATTR(console, S_IRUGO|S_IWUSR, show_console, store_console),
+	__ATTR(cursor, S_IRUGO|S_IWUSR, show_cursor, store_cursor),
+	__ATTR(mode, S_IRUGO|S_IWUSR, show_mode, store_mode),
+	__ATTR(modes, S_IRUGO|S_IWUSR, show_modes, store_modes),
+	__ATTR(pan, S_IRUGO|S_IWUSR, show_pan, store_pan),
+	__ATTR(virtual_size, S_IRUGO|S_IWUSR, show_virtual, store_virtual),
+	__ATTR(name, S_IRUGO, show_name, NULL),
+	__ATTR(stride, S_IRUGO, show_stride, NULL),
+	__ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
+	__ATTR(state, S_IRUGO|S_IWUSR, show_fbstate, store_fbstate),
+#ifdef CONFIG_FB_BACKLIGHT
+	__ATTR(bl_curve, S_IRUGO|S_IWUSR, show_bl_curve, store_bl_curve),
+#endif
+};
+
+int fb_init_device(struct fb_info *fb_info)
+{
+	int i, error = 0;
+
+	dev_set_drvdata(fb_info->dev, fb_info);
+
+	fb_info->class_flag |= FB_SYSFS_FLAG_ATTR;
+
+	for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
+		error = device_create_file(fb_info->dev, &device_attrs[i]);
+
+		if (error)
+			break;
+	}
+
+	if (error) {
+		while (--i >= 0)
+			device_remove_file(fb_info->dev, &device_attrs[i]);
+		fb_info->class_flag &= ~FB_SYSFS_FLAG_ATTR;
+	}
+
+	return 0;
+}
+
+void fb_cleanup_device(struct fb_info *fb_info)
+{
+	unsigned int i;
+
+	if (fb_info->class_flag & FB_SYSFS_FLAG_ATTR) {
+		for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
+			device_remove_file(fb_info->dev, &device_attrs[i]);
+
+		fb_info->class_flag &= ~FB_SYSFS_FLAG_ATTR;
+	}
+}
+
+#ifdef CONFIG_FB_BACKLIGHT
+/* This function generates a linear backlight curve
+ *
+ *     0: off
+ *   1-7: min
+ * 8-127: linear from min to max
+ */
+void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max)
+{
+	unsigned int i, flat, count, range = (max - min);
+
+	mutex_lock(&fb_info->bl_curve_mutex);
+
+	fb_info->bl_curve[0] = off;
+
+	for (flat = 1; flat < (FB_BACKLIGHT_LEVELS / 16); ++flat)
+		fb_info->bl_curve[flat] = min;
+
+	count = FB_BACKLIGHT_LEVELS * 15 / 16;
+	for (i = 0; i < count; ++i)
+		fb_info->bl_curve[flat + i] = min + (range * (i + 1) / count);
+
+	mutex_unlock(&fb_info->bl_curve_mutex);
+}
+EXPORT_SYMBOL_GPL(fb_bl_default_curve);
+#endif