Add a simple-framebuffer vt driver
This allows us to support this hardware and, in the future, use clocks so they are enabled past the initial kernel boot process. Reviewed by: ray Differential Revision: https://reviews.freebsd.org/D30103
This commit is contained in:
Andrew Turner
Kyle Evans
parent
61fd6a1ea2
commit
d5035d913c
@ -49,6 +49,7 @@ device vt
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device kbdmux
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device vt_efifb
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device vt_simplefb
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# Pseudo devices.
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device crypto # core crypto support
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@ -3432,6 +3432,7 @@ dev/vt/colors/vt_termcolors.c optional vt
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dev/vt/font/vt_font_default.c optional vt
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dev/vt/font/vt_mouse_cursor.c optional vt
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dev/vt/hw/efifb/efifb.c optional vt_efifb
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dev/vt/hw/simplefb/simplefb.c optional vt_simplefb
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dev/vt/hw/vbefb/vbefb.c optional vt_vbefb
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dev/vt/hw/fb/vt_fb.c optional vt
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dev/vt/hw/vga/vt_vga.c optional vt vt_vga
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226
sys/dev/vt/hw/simplefb/simplefb.c
Normal file
226
sys/dev/vt/hw/simplefb/simplefb.c
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@ -0,0 +1,226 @@
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2014 The FreeBSD Foundation
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* Copyright (c) 2021 Andrew Turner
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*
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* Portions of this software was developed by Aleksandr Rybalko under
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* sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/fbio.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <dev/vt/vt.h>
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#include <dev/vt/hw/fb/vt_fb.h>
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#include <dev/vt/colors/vt_termcolors.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_subr.h>
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#include <dev/ofw/ofw_bus_subr.h>
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static vd_init_t vt_simplefb_init;
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static vd_fini_t vt_simplefb_fini;
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static vd_probe_t vt_simplefb_probe;
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static struct vt_driver vt_simplefb_driver = {
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.vd_name = "simplefb",
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.vd_probe = vt_simplefb_probe,
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.vd_init = vt_simplefb_init,
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.vd_fini = vt_simplefb_fini,
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.vd_blank = vt_fb_blank,
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.vd_bitblt_text = vt_fb_bitblt_text,
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.vd_invalidate_text = vt_fb_invalidate_text,
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.vd_bitblt_bmp = vt_fb_bitblt_bitmap,
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.vd_drawrect = vt_fb_drawrect,
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.vd_setpixel = vt_fb_setpixel,
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.vd_fb_ioctl = vt_fb_ioctl,
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.vd_fb_mmap = vt_fb_mmap,
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.vd_suspend = vt_suspend,
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.vd_resume = vt_resume,
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/* Better than efifb, but still generic driver. */
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.vd_priority = VD_PRIORITY_GENERIC + 2,
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};
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struct {
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const char *name;
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int rbits, rshift;
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int gbits, gshift;
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int bbits, bshift;
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int depth;
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enum vt_color_format format;
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} simplefb_formats[] = {
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{
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.name = "r5g6b5",
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.rbits = 5, .rshift = 11,
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.gbits = 6, .gshift = 5,
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.bbits = 5, .bshift = 0,
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.depth = 16, .format = COLOR_FORMAT_RGB,
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},
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{
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.name = "r8g8b8",
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.rbits = 8, .rshift = 16,
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.gbits = 8, .gshift = 8,
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.bbits = 8, .bshift = 0,
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.depth = 24, .format = COLOR_FORMAT_RGB,
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},
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{
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.name = "a8r8g8b8",
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.rbits = 8, .rshift = 16,
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.gbits = 8, .gshift = 8,
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.bbits = 8, .bshift = 0,
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.depth = 32, .format = COLOR_FORMAT_RGB,
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},
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{
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.name = "x8r8g8b8",
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.rbits = 8, .rshift = 16,
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.gbits = 8, .gshift = 8,
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.bbits = 8, .bshift = 0,
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.depth = 32, .format = COLOR_FORMAT_RGB,
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},
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{
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.name = "x2r10g10b10",
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.rbits = 10, .rshift = 20,
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.gbits = 10, .gshift = 10,
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.bbits = 10, .bshift = 0,
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.depth = 32, .format = COLOR_FORMAT_RGB,
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},
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};
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static struct fb_info local_info;
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VT_DRIVER_DECLARE(vt_simplefb, vt_simplefb_driver);
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static bool
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vt_simplefb_node(phandle_t *nodep)
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{
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phandle_t chosen, node;
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chosen = OF_finddevice("/chosen");
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if (chosen == -1)
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return (false);
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for (node = OF_child(chosen); node != 0; node = OF_peer(node)) {
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if (ofw_bus_node_is_compatible(node, "simple-framebuffer"))
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break;
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}
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if (node == 0)
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return (false);
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if (nodep != NULL)
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*nodep = node;
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return (true);
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}
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static int
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vt_simplefb_probe(struct vt_device *vd)
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{
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int disabled;
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disabled = 0;
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TUNABLE_INT_FETCH("hw.syscons.disable", &disabled);
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if (disabled != 0)
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return (CN_DEAD);
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if (!vt_simplefb_node(NULL))
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return (CN_DEAD);
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return (CN_INTERNAL);
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}
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static int
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vt_simplefb_init(struct vt_device *vd)
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{
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char format[16];
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pcell_t height, width, stride;
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struct fb_info *sc;
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phandle_t node;
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bus_size_t size;
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int error;
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/* Initialize softc */
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vd->vd_softc = sc = &local_info;
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if (!vt_simplefb_node(&node))
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return (CN_DEAD);
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if (OF_getencprop(node, "height", &height, sizeof(height)) == -1 ||
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OF_getencprop(node, "width", &width, sizeof(width)) == -1 ||
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OF_getencprop(node, "stride", &stride, sizeof(stride)) == -1 ||
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OF_getprop(node, "format", format, sizeof(format)) == -1) {
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return (CN_DEAD);
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}
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sc->fb_height = height;
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sc->fb_width = width;
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sc->fb_stride = stride;
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sc->fb_cmsize = NCOLORS;
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error = 1;
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for (int i = 0; i < nitems(simplefb_formats); i++) {
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if (strcmp(format, simplefb_formats[i].name) == 0) {
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vt_config_cons_colors(sc,
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simplefb_formats[i].format,
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(1 << simplefb_formats[i].rbits) - 1,
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simplefb_formats[i].rshift,
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(1 << simplefb_formats[i].gbits) - 1,
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simplefb_formats[i].gshift,
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(1 << simplefb_formats[i].bbits) - 1,
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simplefb_formats[i].bshift);
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sc->fb_depth = sc->fb_bpp = simplefb_formats[i].depth;
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error = 0;
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break;
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}
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}
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if (error != 0)
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return (CN_DEAD);
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ofw_reg_to_paddr(node, 0, &sc->fb_pbase, &size, NULL);
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sc->fb_vbase = (intptr_t)pmap_mapdev_attr(sc->fb_pbase,
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size, VM_MEMATTR_WRITE_COMBINING);
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sc->fb_size = size;
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vt_fb_init(vd);
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return (CN_INTERNAL);
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}
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static void
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vt_simplefb_fini(struct vt_device *vd, void *softc)
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{
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struct fb_info *sc;
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sc = softc;
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vt_fb_fini(vd, softc);
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pmap_unmapdev((void *)sc->fb_vbase, sc->fb_size);
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}
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