sunxi_fb.c revision 1.2 
1/* $NetBSD: sunxi_fb.c,v 1.2 2019/01/30 02:44:19 jmcneill Exp $ */
2
3/*-
4 * Copyright (c) 2015-2019 Jared McNeill <jmcneill@invisible.ca>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include "opt_wsdisplay_compat.h"
30
31#include <sys/cdefs.h>
32__KERNEL_RCSID(0, "$NetBSD: sunxi_fb.c,v 1.2 2019/01/30 02:44:19 jmcneill Exp $");
33
34#include <sys/param.h>
35#include <sys/bus.h>
36#include <sys/device.h>
37
38#include <dev/fdt/fdtvar.h>
39
40#include <dev/wscons/wsdisplayvar.h>
41
42#include <drm/drmP.h>
43#include <drm/drmfb.h>
44
45#include <arm/sunxi/sunxi_drm.h>
46
47static int	sunxi_fb_match(device_t, cfdata_t, void *);
48static void	sunxi_fb_attach(device_t, device_t, void *);
49
50static bool	sunxi_fb_shutdown(device_t, int);
51
52struct sunxi_fb_softc {
53	struct drmfb_softc	sc_drmfb;
54	device_t		sc_dev;
55	struct sunxi_drm_softc	*sc_drm;
56	struct sunxi_drm_framebuffer *sc_fb;
57	struct sunxi_drmfb_attach_args sc_sfa;
58};
59
60static paddr_t	sunxi_fb_mmapfb(struct drmfb_softc *, off_t, int);
61static int	sunxi_fb_ioctl(struct drmfb_softc *, u_long, void *, int,
62			       lwp_t *);
63
64static const struct drmfb_params sunxifb_drmfb_params = {
65	.dp_mmapfb = sunxi_fb_mmapfb,
66	.dp_ioctl = sunxi_fb_ioctl,
67
68};
69
70CFATTACH_DECL_NEW(sunxi_fb, sizeof(struct sunxi_fb_softc),
71	sunxi_fb_match, sunxi_fb_attach, NULL, NULL);
72
73static int
74sunxi_fb_match(device_t parent, cfdata_t cf, void *aux)
75{
76	return 1;
77}
78
79static void
80sunxi_fb_attach(device_t parent, device_t self, void *aux)
81{
82	struct sunxi_fb_softc * const sc = device_private(self);
83	struct sunxi_drm_softc * const drmsc = device_private(parent);
84	struct sunxi_drmfb_attach_args * const sfa = aux;
85	int error;
86
87	sc->sc_dev = self;
88	sc->sc_drm = drmsc;
89	sc->sc_sfa = *sfa;
90	sc->sc_fb = to_sunxi_drm_framebuffer(sfa->sfa_fb_helper->fb);
91
92	aprint_naive("\n");
93	aprint_normal("\n");
94
95#ifdef WSDISPLAY_MULTICONS
96	prop_dictionary_t dict = device_properties(self);
97	const bool is_console = true;
98	prop_dictionary_set_bool(dict, "is_console", is_console);
99	wsdisplay_cndetach();
100#endif
101
102	const struct drmfb_attach_args da = {
103		.da_dev = self,
104		.da_fb_helper = sfa->sfa_fb_helper,
105		.da_fb_sizes = &sfa->sfa_fb_sizes,
106		.da_fb_vaddr = sc->sc_fb->obj->vaddr,
107		.da_fb_linebytes = sfa->sfa_fb_linebytes,
108		.da_params = &sunxifb_drmfb_params,
109	};
110
111	error = drmfb_attach(&sc->sc_drmfb, &da);
112	if (error) {
113		aprint_error_dev(self, "failed to attach drmfb: %d\n", error);
114		return;
115	}
116
117	pmf_device_register1(self, NULL, NULL, sunxi_fb_shutdown);
118}
119
120static bool
121sunxi_fb_shutdown(device_t self, int flags)
122{
123	struct sunxi_fb_softc * const sc = device_private(self);
124
125	return drmfb_shutdown(&sc->sc_drmfb, flags);
126}
127
128static paddr_t
129sunxi_fb_mmapfb(struct drmfb_softc *sc, off_t off, int prot)
130{
131	struct sunxi_fb_softc * const tfb_sc = (struct sunxi_fb_softc *)sc;
132	struct drm_gem_cma_object *obj = tfb_sc->sc_fb->obj;
133
134	KASSERT(off >= 0);
135	KASSERT(off < obj->dmasize);
136
137	return bus_dmamem_mmap(obj->dmat, obj->dmasegs, 1, off, prot,
138	    BUS_DMA_PREFETCHABLE);
139}
140
141static int
142sunxi_fb_ioctl(struct drmfb_softc *sc, u_long cmd, void *data, int flag,
143    lwp_t *l)
144{
145	struct wsdisplayio_bus_id *busid;
146	struct wsdisplayio_fbinfo *fbi;
147	struct rasops_info *ri = &sc->sc_genfb.vd.active->scr_ri;
148	int error;
149
150	switch (cmd) {
151	case WSDISPLAYIO_GET_BUSID:
152		busid = data;
153		busid->bus_type = WSDISPLAYIO_BUS_SOC;
154		return 0;
155	case WSDISPLAYIO_GTYPE:
156		*(u_int *)data = WSDISPLAY_TYPE_GENFB;
157		return 0;
158	case WSDISPLAYIO_GET_FBINFO:
159		fbi = data;
160		error = wsdisplayio_get_fbinfo(ri, fbi);
161		fbi->fbi_flags |= WSFB_VRAM_IS_RAM;
162		return error;
163	default:
164		return EPASSTHROUGH;
165	}
166}
167