Home | History | Annotate | Line # | Download | only in ti 
      1 /* $NetBSD: ti_fb.c,v 1.4 2022/09/25 07:50:32 riastradh Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2015-2019 Jared McNeill <jmcneill (at) 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: ti_fb.c,v 1.4 2022/09/25 07:50:32 riastradh 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 #include <dev/fdt/fdt_port.h>
     40 
     41 #include <drm/drm_drv.h>
     42 #include <drm/drmfb.h>
     43 
     44 #include <arm/ti/ti_lcdc.h>
     45 
     46 static int	ti_fb_match(device_t, cfdata_t, void *);
     47 static void	ti_fb_attach(device_t, device_t, void *);
     48 
     49 static void	tilcdc_fb_init(struct tilcdc_drm_task *);
     50 
     51 static bool	ti_fb_shutdown(device_t, int);
     52 
     53 struct ti_fb_softc {
     54 	struct drmfb_softc	sc_drmfb;
     55 	device_t		sc_dev;
     56 	struct tilcdc_framebuffer *sc_fb;
     57 	struct tilcdcfb_attach_args sc_tfa;
     58 	struct tilcdc_drm_task	sc_attach_task;
     59 };
     60 
     61 static paddr_t	ti_fb_mmapfb(struct drmfb_softc *, off_t, int);
     62 static int	ti_fb_ioctl(struct drmfb_softc *, u_long, void *, int,
     63 			       lwp_t *);
     64 
     65 static const struct drmfb_params tifb_drmfb_params = {
     66 	.dp_mmapfb = ti_fb_mmapfb,
     67 	.dp_ioctl = ti_fb_ioctl,
     68 };
     69 
     70 CFATTACH_DECL_NEW(ti_fb, sizeof(struct ti_fb_softc),
     71 	ti_fb_match, ti_fb_attach, NULL, NULL);
     72 
     73 static int
     74 ti_fb_match(device_t parent, cfdata_t cf, void *aux)
     75 {
     76 	return 1;
     77 }
     78 
     79 static void
     80 ti_fb_attach(device_t parent, device_t self, void *aux)
     81 {
     82 	struct ti_fb_softc * const sc = device_private(self);
     83 	struct tilcdcfb_attach_args * const tfa = aux;
     84 
     85 	sc->sc_dev = self;
     86 	sc->sc_tfa = *tfa;
     87 	sc->sc_fb = to_tilcdc_framebuffer(tfa->tfa_fb_helper->fb);
     88 
     89 	aprint_naive("\n");
     90 	aprint_normal("\n");
     91 
     92 	tilcdc_task_init(&sc->sc_attach_task, &tilcdc_fb_init);
     93 	tilcdc_task_schedule(parent, &sc->sc_attach_task);
     94 }
     95 
     96 static void
     97 tilcdc_fb_init(struct tilcdc_drm_task *task)
     98 {
     99 	struct ti_fb_softc *sc = container_of(task, struct ti_fb_softc,
    100 	    sc_attach_task);
    101 	device_t self = sc->sc_dev;
    102 	struct tilcdcfb_attach_args * const tfa = &sc->sc_tfa;
    103 	const struct drmfb_attach_args da = {
    104 		.da_dev = self,
    105 		.da_fb_helper = tfa->tfa_fb_helper,
    106 		.da_fb_sizes = &tfa->tfa_fb_sizes,
    107 		.da_fb_vaddr = sc->sc_fb->obj->vaddr,
    108 		.da_fb_linebytes = tfa->tfa_fb_linebytes,
    109 		.da_params = &tifb_drmfb_params,
    110 	};
    111 	int error;
    112 
    113 	error = drmfb_attach(&sc->sc_drmfb, &da);
    114 	if (error) {
    115 		aprint_error_dev(self, "failed to attach drmfb: %d\n", error);
    116 		return;
    117 	}
    118 
    119 	pmf_device_register1(self, NULL, NULL, ti_fb_shutdown);
    120 }
    121 
    122 static bool
    123 ti_fb_shutdown(device_t self, int flags)
    124 {
    125 	struct ti_fb_softc * const sc = device_private(self);
    126 
    127 	return drmfb_shutdown(&sc->sc_drmfb, flags);
    128 }
    129 
    130 static paddr_t
    131 ti_fb_mmapfb(struct drmfb_softc *sc, off_t off, int prot)
    132 {
    133 	struct ti_fb_softc * const tfb_sc = (struct ti_fb_softc *)sc;
    134 	struct drm_gem_cma_object *obj = tfb_sc->sc_fb->obj;
    135 
    136 	KASSERT(off >= 0);
    137 	KASSERT(off < obj->dmasize);
    138 
    139 	return bus_dmamem_mmap(obj->dmat, obj->dmasegs, 1, off, prot,
    140 	    BUS_DMA_PREFETCHABLE);
    141 }
    142 
    143 static int
    144 ti_fb_ioctl(struct drmfb_softc *sc, u_long cmd, void *data, int flag,
    145     lwp_t *l)
    146 {
    147 	struct wsdisplayio_bus_id *busid;
    148 	struct wsdisplayio_fbinfo *fbi;
    149 	struct rasops_info *ri = &sc->sc_genfb.vd.active->scr_ri;
    150 	int error;
    151 
    152 	switch (cmd) {
    153 	case WSDISPLAYIO_GET_BUSID:
    154 		busid = data;
    155 		busid->bus_type = WSDISPLAYIO_BUS_SOC;
    156 		return 0;
    157 	case WSDISPLAYIO_GTYPE:
    158 		*(u_int *)data = WSDISPLAY_TYPE_GENFB;
    159 		return 0;
    160 	case WSDISPLAYIO_GET_FBINFO:
    161 		fbi = data;
    162 		error = wsdisplayio_get_fbinfo(ri, fbi);
    163 		fbi->fbi_flags |= WSFB_VRAM_IS_RAM;
    164 		return error;
    165 	default:
    166 		return EPASSTHROUGH;
    167 	}
    168 }
    169