svn commit: r256905 - user/ed/newcons/sys/dev/fb
Aleksandr Rybalko
ray at FreeBSD.org
Tue Oct 22 14:45:35 UTC 2013
Author: ray
Date: Tue Oct 22 14:45:35 2013
New Revision: 256905
URL: http://svnweb.freebsd.org/changeset/base/256905
Log:
Add generic/simple framebuffer.
Sponsored by: The FreeBSD Foundation
Added:
user/ed/newcons/sys/dev/fb/fbd.c (contents, props changed)
Added: user/ed/newcons/sys/dev/fb/fbd.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/ed/newcons/sys/dev/fb/fbd.c Tue Oct 22 14:45:35 2013 (r256905)
@@ -0,0 +1,324 @@
+/*-
+ * Copyright (c) 2013 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Aleksandr Rybalko under sponsorship from the
+ * FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+/* Generic framebuffer */
+/* TODO unlink from VT(9) */
+/* TODO done normal /dev/fb methods */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/conf.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/queue.h>
+#include <sys/fbio.h>
+#include <dev/vt/hw/fb/vt_fb.h>
+
+LIST_HEAD(fb_list_head_t, fb_list_entry) fb_list_head =
+ LIST_HEAD_INITIALIZER(fb_list_head);
+struct fb_list_entry {
+ struct fb_info *fb_info;
+ struct cdev *fb_si;
+ LIST_ENTRY(fb_list_entry) fb_list;
+};
+
+static void fbd_evh_init(void *);
+/* SI_ORDER_SECOND, just after EVENTHANDLERs initialized. */
+SYSINIT(fbd_evh_init, SI_SUB_CONFIGURE, SI_ORDER_SECOND, fbd_evh_init, NULL);
+
+static d_open_t fb_open;
+static d_close_t fb_close;
+static d_read_t fb_read;
+static d_write_t fb_write;
+static d_ioctl_t fb_ioctl;
+static d_mmap_t fb_mmap;
+
+static struct cdevsw fb_cdevsw = {
+ .d_version = D_VERSION,
+ .d_flags = D_NEEDGIANT,
+ .d_open = fb_open,
+ .d_close = fb_close,
+ .d_read = fb_read,
+ .d_write = fb_write,
+ .d_ioctl = fb_ioctl,
+ .d_mmap = fb_mmap,
+ .d_name = "fb",
+};
+
+static int framebuffer_dev_unit = 0;
+
+static int
+fb_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
+{
+
+ return (0);
+}
+
+static int
+fb_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
+{
+
+ return (0);
+}
+
+static int
+fb_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
+ struct thread *td)
+{
+
+ return (0);
+}
+
+static int
+fb_read(struct cdev *dev, struct uio *uio, int ioflag)
+{
+
+ return (0); /* XXX nothing to read, yet */
+}
+
+static int
+fb_write(struct cdev *dev, struct uio *uio, int ioflag)
+{
+
+ return (0); /* XXX nothing written */
+}
+
+static int
+fb_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr, int nprot,
+ vm_memattr_t *memattr)
+{
+ struct fb_info *info;
+
+ info = dev->si_drv1;
+ if (offset < info->fb_size) {
+ *paddr = info->fb_pbase + offset;
+ return (0);
+ }
+ return (EINVAL);
+}
+
+
+static void
+vt_fb_mem_wr1(struct fb_info *sc, uint32_t o, uint8_t v)
+{
+
+ KASSERT((o < sc->fb_size), ("Offset %#08x out of fb size", o));
+ *(uint8_t *)(sc->fb_vbase + o) = v;
+}
+
+static void
+vt_fb_mem_wr2(struct fb_info *sc, uint32_t o, uint16_t v)
+{
+
+ KASSERT((o < sc->fb_size), ("Offset %#08x out of fb size", o));
+ *(uint16_t *)(sc->fb_vbase + o) = v;
+}
+
+static void
+vt_fb_mem_wr4(struct fb_info *sc, uint32_t o, uint32_t v)
+{
+
+ KASSERT((o < sc->fb_size), ("Offset %#08x out of fb size", o));
+ *(uint32_t *)(sc->fb_vbase + o) = v;
+}
+
+static void
+vt_fb_indir_wr1(struct fb_info *sc, uint32_t o, uint8_t v)
+{
+
+ KASSERT((o < sc->fb_size), ("Offset %#08x out of fb size", o));
+ sc->fb_write(sc->fb_priv, o, &v, 1);
+}
+
+static void
+vt_fb_indir_wr2(struct fb_info *sc, uint32_t o, uint16_t v)
+{
+
+ KASSERT((o < sc->fb_size), ("Offset %#08x out of fb size", o));
+ sc->fb_write(sc->fb_priv, o, &v, 2);
+}
+
+static void
+vt_fb_indir_wr4(struct fb_info *sc, uint32_t o, uint32_t v)
+{
+
+ KASSERT((o < sc->fb_size), ("Offset %#08x out of fb size", o));
+ sc->fb_write(sc->fb_priv, o, &v, 4);
+}
+
+static int
+fb_probe(struct fb_info *info)
+{
+
+ if (info->fb_size == 0)
+ return (ENXIO);
+
+ if (info->fb_write != NULL) {
+ if (info->fb_write == NULL) {
+ return (EINVAL);
+ }
+ info->fb_flags |= FB_FLAG_NOMMAP;
+ info->wr1 = &vt_fb_indir_wr1;
+ info->wr2 = &vt_fb_indir_wr2;
+ info->wr4 = &vt_fb_indir_wr4;
+ } else if (info->fb_vbase != 0) {
+ if (info->fb_pbase == 0)
+ info->fb_flags |= FB_FLAG_NOMMAP;
+ info->wr1 = &vt_fb_mem_wr1;
+ info->wr2 = &vt_fb_mem_wr2;
+ info->wr4 = &vt_fb_mem_wr4;
+ } else
+ return (ENXIO);
+
+ return (0);
+}
+
+
+static int
+fb_init(struct fb_list_entry *entry, int unit)
+{
+ struct fb_info *info;
+
+ info = entry->fb_info;
+ entry->fb_si = make_dev(&fb_cdevsw, unit, UID_ROOT, GID_WHEEL,
+ 0600, "fb%d", unit);
+ entry->fb_si->si_drv1 = info;
+
+ return (0);
+}
+
+int
+fbd_list()
+{
+ struct fb_list_entry *entry;
+
+ if (LIST_EMPTY(&fb_list_head))
+ return (ENOENT);
+
+ LIST_FOREACH(entry, &fb_list_head, fb_list) {
+ printf("FB %s @%p\n", entry->fb_info->fb_name,
+ (void *)entry->fb_info->fb_pbase);
+ }
+
+ return (0);
+}
+
+static struct fb_list_entry *
+fbd_find(struct fb_info* info)
+{
+ struct fb_list_entry *entry, *tmp;
+
+ LIST_FOREACH_SAFE(entry, &fb_list_head, fb_list, tmp) {
+ if (entry->fb_info == info) {
+ return (entry);
+ }
+ }
+
+ return (NULL);
+}
+
+int
+fbd_register(struct fb_info* info)
+{
+ struct fb_list_entry *entry;
+ int err, first;
+
+ first = 0;
+ if (LIST_EMPTY(&fb_list_head))
+ first++;
+
+ entry = fbd_find(info);
+ if (entry != NULL) {
+ /* XXX Update framebuffer params */
+ return (0);
+ }
+
+ err = fb_probe(info);
+ if (err)
+ return (err);
+
+ entry = malloc(sizeof(struct fb_list_entry), M_DEVBUF, M_WAITOK|M_ZERO);
+ entry->fb_info = info;
+
+ LIST_INSERT_HEAD(&fb_list_head, entry, fb_list);
+
+ err = fb_init(entry, framebuffer_dev_unit++);
+ if (err)
+ return (err);
+
+ if (first)
+ vt_fb_attach(info);
+
+ return (0);
+}
+
+int
+fbd_unregister(struct fb_info* info)
+{
+ struct fb_list_entry *entry, *tmp;
+
+ LIST_FOREACH_SAFE(entry, &fb_list_head, fb_list, tmp) {
+ if (entry->fb_info == info) {
+ LIST_REMOVE(entry, fb_list);
+ free(entry, M_DEVBUF);
+ return (0);
+ }
+ }
+
+ return (ENOENT);
+}
+
+static void
+register_fb_wrap(void *arg, void *ptr)
+{
+
+ fbd_register((struct fb_info *)ptr);
+}
+
+static void
+unregister_fb_wrap(void *arg, void *ptr)
+{
+
+ fbd_unregister((struct fb_info *)ptr);
+}
+
+static void
+fbd_evh_init(void *ctx)
+{
+
+ EVENTHANDLER_REGISTER(register_framebuffer, register_fb_wrap, NULL,
+ EVENTHANDLER_PRI_ANY);
+ EVENTHANDLER_REGISTER(unregister_framebuffer, unregister_fb_wrap, NULL,
+ EVENTHANDLER_PRI_ANY);
+}
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