508 lines
10 KiB
C
508 lines
10 KiB
C
/*
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* linux/drivers/video/omap2/omapfb-sysfs.c
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*
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* Copyright (C) 2008 Nokia Corporation
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* Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
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*
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* Some code and ideas taken from drivers/video/omap/ driver
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* by Imre Deak.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/fb.h>
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#include <linux/sysfs.h>
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#include <linux/device.h>
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#include <linux/uaccess.h>
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#include <linux/platform_device.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/omapfb.h>
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#include <plat/display.h>
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#include <plat/vrfb.h>
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#include "omapfb.h"
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static ssize_t show_rotate_type(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct fb_info *fbi = dev_get_drvdata(dev);
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struct omapfb_info *ofbi = FB2OFB(fbi);
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return snprintf(buf, PAGE_SIZE, "%d\n", ofbi->rotation_type);
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}
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static ssize_t store_rotate_type(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct fb_info *fbi = dev_get_drvdata(dev);
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struct omapfb_info *ofbi = FB2OFB(fbi);
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enum omap_dss_rotation_type rot_type;
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int r;
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rot_type = simple_strtoul(buf, NULL, 0);
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if (rot_type != OMAP_DSS_ROT_DMA && rot_type != OMAP_DSS_ROT_VRFB)
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return -EINVAL;
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lock_fb_info(fbi);
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r = 0;
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if (rot_type == ofbi->rotation_type)
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goto out;
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if (ofbi->region.size) {
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r = -EBUSY;
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goto out;
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}
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ofbi->rotation_type = rot_type;
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/*
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* Since the VRAM for this FB is not allocated at the moment we don't
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* need to do any further parameter checking at this point.
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*/
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out:
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unlock_fb_info(fbi);
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return r ? r : count;
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}
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static ssize_t show_mirror(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct fb_info *fbi = dev_get_drvdata(dev);
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struct omapfb_info *ofbi = FB2OFB(fbi);
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return snprintf(buf, PAGE_SIZE, "%d\n", ofbi->mirror);
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}
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static ssize_t store_mirror(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct fb_info *fbi = dev_get_drvdata(dev);
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struct omapfb_info *ofbi = FB2OFB(fbi);
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bool mirror;
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int r;
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struct fb_var_screeninfo new_var;
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mirror = simple_strtoul(buf, NULL, 0);
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if (mirror != 0 && mirror != 1)
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return -EINVAL;
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lock_fb_info(fbi);
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ofbi->mirror = mirror;
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memcpy(&new_var, &fbi->var, sizeof(new_var));
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r = check_fb_var(fbi, &new_var);
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if (r)
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goto out;
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memcpy(&fbi->var, &new_var, sizeof(fbi->var));
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set_fb_fix(fbi);
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r = omapfb_apply_changes(fbi, 0);
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if (r)
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goto out;
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r = count;
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out:
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unlock_fb_info(fbi);
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return r;
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}
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static ssize_t show_overlays(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct fb_info *fbi = dev_get_drvdata(dev);
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struct omapfb_info *ofbi = FB2OFB(fbi);
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struct omapfb2_device *fbdev = ofbi->fbdev;
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ssize_t l = 0;
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int t;
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omapfb_lock(fbdev);
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lock_fb_info(fbi);
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for (t = 0; t < ofbi->num_overlays; t++) {
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struct omap_overlay *ovl = ofbi->overlays[t];
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int ovlnum;
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for (ovlnum = 0; ovlnum < fbdev->num_overlays; ++ovlnum)
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if (ovl == fbdev->overlays[ovlnum])
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break;
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l += snprintf(buf + l, PAGE_SIZE - l, "%s%d",
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t == 0 ? "" : ",", ovlnum);
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}
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l += snprintf(buf + l, PAGE_SIZE - l, "\n");
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unlock_fb_info(fbi);
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omapfb_unlock(fbdev);
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return l;
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}
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static struct omapfb_info *get_overlay_fb(struct omapfb2_device *fbdev,
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struct omap_overlay *ovl)
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{
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int i, t;
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for (i = 0; i < fbdev->num_fbs; i++) {
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struct omapfb_info *ofbi = FB2OFB(fbdev->fbs[i]);
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for (t = 0; t < ofbi->num_overlays; t++) {
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if (ofbi->overlays[t] == ovl)
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return ofbi;
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}
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}
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return NULL;
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}
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static ssize_t store_overlays(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct fb_info *fbi = dev_get_drvdata(dev);
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struct omapfb_info *ofbi = FB2OFB(fbi);
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struct omapfb2_device *fbdev = ofbi->fbdev;
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struct omap_overlay *ovls[OMAPFB_MAX_OVL_PER_FB];
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struct omap_overlay *ovl;
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int num_ovls, r, i;
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int len;
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bool added = false;
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num_ovls = 0;
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len = strlen(buf);
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if (buf[len - 1] == '\n')
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len = len - 1;
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omapfb_lock(fbdev);
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lock_fb_info(fbi);
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if (len > 0) {
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char *p = (char *)buf;
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int ovlnum;
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while (p < buf + len) {
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int found;
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if (num_ovls == OMAPFB_MAX_OVL_PER_FB) {
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r = -EINVAL;
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goto out;
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}
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ovlnum = simple_strtoul(p, &p, 0);
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if (ovlnum > fbdev->num_overlays) {
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r = -EINVAL;
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goto out;
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}
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found = 0;
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for (i = 0; i < num_ovls; ++i) {
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if (ovls[i] == fbdev->overlays[ovlnum]) {
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found = 1;
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break;
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}
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}
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if (!found)
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ovls[num_ovls++] = fbdev->overlays[ovlnum];
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p++;
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}
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}
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for (i = 0; i < num_ovls; ++i) {
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struct omapfb_info *ofbi2 = get_overlay_fb(fbdev, ovls[i]);
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if (ofbi2 && ofbi2 != ofbi) {
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dev_err(fbdev->dev, "overlay already in use\n");
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r = -EINVAL;
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goto out;
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}
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}
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/* detach unused overlays */
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for (i = 0; i < ofbi->num_overlays; ++i) {
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int t, found;
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ovl = ofbi->overlays[i];
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found = 0;
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for (t = 0; t < num_ovls; ++t) {
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if (ovl == ovls[t]) {
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found = 1;
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break;
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}
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}
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if (found)
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continue;
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DBG("detaching %d\n", ofbi->overlays[i]->id);
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omapfb_overlay_enable(ovl, 0);
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if (ovl->manager)
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ovl->manager->apply(ovl->manager);
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for (t = i + 1; t < ofbi->num_overlays; t++) {
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ofbi->rotation[t-1] = ofbi->rotation[t];
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ofbi->overlays[t-1] = ofbi->overlays[t];
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}
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ofbi->num_overlays--;
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i--;
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}
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for (i = 0; i < num_ovls; ++i) {
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int t, found;
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ovl = ovls[i];
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found = 0;
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for (t = 0; t < ofbi->num_overlays; ++t) {
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if (ovl == ofbi->overlays[t]) {
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found = 1;
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break;
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}
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}
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if (found)
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continue;
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ofbi->rotation[ofbi->num_overlays] = 0;
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ofbi->overlays[ofbi->num_overlays++] = ovl;
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added = true;
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}
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if (added) {
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r = omapfb_apply_changes(fbi, 0);
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if (r)
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goto out;
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}
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r = count;
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out:
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unlock_fb_info(fbi);
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omapfb_unlock(fbdev);
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return r;
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}
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static ssize_t show_overlays_rotate(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct fb_info *fbi = dev_get_drvdata(dev);
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struct omapfb_info *ofbi = FB2OFB(fbi);
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ssize_t l = 0;
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int t;
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lock_fb_info(fbi);
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for (t = 0; t < ofbi->num_overlays; t++) {
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l += snprintf(buf + l, PAGE_SIZE - l, "%s%d",
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t == 0 ? "" : ",", ofbi->rotation[t]);
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}
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l += snprintf(buf + l, PAGE_SIZE - l, "\n");
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unlock_fb_info(fbi);
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return l;
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}
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static ssize_t store_overlays_rotate(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t count)
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{
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struct fb_info *fbi = dev_get_drvdata(dev);
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struct omapfb_info *ofbi = FB2OFB(fbi);
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int num_ovls = 0, r, i;
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int len;
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bool changed = false;
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u8 rotation[OMAPFB_MAX_OVL_PER_FB];
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len = strlen(buf);
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if (buf[len - 1] == '\n')
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len = len - 1;
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lock_fb_info(fbi);
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if (len > 0) {
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char *p = (char *)buf;
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while (p < buf + len) {
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int rot;
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if (num_ovls == ofbi->num_overlays) {
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r = -EINVAL;
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goto out;
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}
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rot = simple_strtoul(p, &p, 0);
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if (rot < 0 || rot > 3) {
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r = -EINVAL;
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goto out;
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}
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if (ofbi->rotation[num_ovls] != rot)
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changed = true;
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rotation[num_ovls++] = rot;
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p++;
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}
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}
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if (num_ovls != ofbi->num_overlays) {
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r = -EINVAL;
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goto out;
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}
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if (changed) {
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for (i = 0; i < num_ovls; ++i)
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ofbi->rotation[i] = rotation[i];
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r = omapfb_apply_changes(fbi, 0);
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if (r)
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goto out;
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/* FIXME error handling? */
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}
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r = count;
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out:
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unlock_fb_info(fbi);
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return r;
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}
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static ssize_t show_size(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct fb_info *fbi = dev_get_drvdata(dev);
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struct omapfb_info *ofbi = FB2OFB(fbi);
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return snprintf(buf, PAGE_SIZE, "%lu\n", ofbi->region.size);
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}
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static ssize_t store_size(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct fb_info *fbi = dev_get_drvdata(dev);
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struct omapfb_info *ofbi = FB2OFB(fbi);
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unsigned long size;
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int r;
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int i;
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size = PAGE_ALIGN(simple_strtoul(buf, NULL, 0));
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lock_fb_info(fbi);
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for (i = 0; i < ofbi->num_overlays; i++) {
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if (ofbi->overlays[i]->info.enabled) {
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r = -EBUSY;
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goto out;
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}
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}
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if (size != ofbi->region.size) {
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r = omapfb_realloc_fbmem(fbi, size, ofbi->region.type);
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if (r) {
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dev_err(dev, "realloc fbmem failed\n");
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goto out;
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}
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}
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r = count;
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out:
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unlock_fb_info(fbi);
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return r;
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}
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static ssize_t show_phys(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct fb_info *fbi = dev_get_drvdata(dev);
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struct omapfb_info *ofbi = FB2OFB(fbi);
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return snprintf(buf, PAGE_SIZE, "%0x\n", ofbi->region.paddr);
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}
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static ssize_t show_virt(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct fb_info *fbi = dev_get_drvdata(dev);
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struct omapfb_info *ofbi = FB2OFB(fbi);
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return snprintf(buf, PAGE_SIZE, "%p\n", ofbi->region.vaddr);
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}
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static struct device_attribute omapfb_attrs[] = {
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__ATTR(rotate_type, S_IRUGO | S_IWUSR, show_rotate_type,
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store_rotate_type),
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__ATTR(mirror, S_IRUGO | S_IWUSR, show_mirror, store_mirror),
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__ATTR(size, S_IRUGO | S_IWUSR, show_size, store_size),
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__ATTR(overlays, S_IRUGO | S_IWUSR, show_overlays, store_overlays),
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__ATTR(overlays_rotate, S_IRUGO | S_IWUSR, show_overlays_rotate,
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store_overlays_rotate),
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__ATTR(phys_addr, S_IRUGO, show_phys, NULL),
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__ATTR(virt_addr, S_IRUGO, show_virt, NULL),
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};
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int omapfb_create_sysfs(struct omapfb2_device *fbdev)
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{
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int i;
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int r;
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DBG("create sysfs for fbs\n");
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for (i = 0; i < fbdev->num_fbs; i++) {
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int t;
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for (t = 0; t < ARRAY_SIZE(omapfb_attrs); t++) {
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r = device_create_file(fbdev->fbs[i]->dev,
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&omapfb_attrs[t]);
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if (r) {
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dev_err(fbdev->dev, "failed to create sysfs "
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"file\n");
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return r;
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}
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}
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}
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return 0;
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}
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void omapfb_remove_sysfs(struct omapfb2_device *fbdev)
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{
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int i, t;
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DBG("remove sysfs for fbs\n");
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for (i = 0; i < fbdev->num_fbs; i++) {
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for (t = 0; t < ARRAY_SIZE(omapfb_attrs); t++)
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device_remove_file(fbdev->fbs[i]->dev,
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&omapfb_attrs[t]);
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}
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}
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