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/* $NetBSD: ti_fb.c,v 1.4 2022/09/25 07:50:32 riastradh Exp $ */
/*-
* Copyright (c) 2015-2019 Jared McNeill <jmcneill@invisible.ca>
* All rights reserved.
*
* 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 ``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 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.
*/
#include "opt_wsdisplay_compat.h"
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ti_fb.c,v 1.4 2022/09/25 07:50:32 riastradh Exp $");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/device.h>
#include <dev/fdt/fdtvar.h>
#include <dev/fdt/fdt_port.h>
#include <drm/drm_drv.h>
#include <drm/drmfb.h>
#include <arm/ti/ti_lcdc.h>
static int ti_fb_match(device_t, cfdata_t, void *);
static void ti_fb_attach(device_t, device_t, void *);
static void tilcdc_fb_init(struct tilcdc_drm_task *);
static bool ti_fb_shutdown(device_t, int);
struct ti_fb_softc {
struct drmfb_softc sc_drmfb;
device_t sc_dev;
struct tilcdc_framebuffer *sc_fb;
struct tilcdcfb_attach_args sc_tfa;
struct tilcdc_drm_task sc_attach_task;
};
static paddr_t ti_fb_mmapfb(struct drmfb_softc *, off_t, int);
static int ti_fb_ioctl(struct drmfb_softc *, u_long, void *, int,
lwp_t *);
static const struct drmfb_params tifb_drmfb_params = {
.dp_mmapfb = ti_fb_mmapfb,
.dp_ioctl = ti_fb_ioctl,
};
CFATTACH_DECL_NEW(ti_fb, sizeof(struct ti_fb_softc),
ti_fb_match, ti_fb_attach, NULL, NULL);
static int
ti_fb_match(device_t parent, cfdata_t cf, void *aux)
{
return 1;
}
static void
ti_fb_attach(device_t parent, device_t self, void *aux)
{
struct ti_fb_softc * const sc = device_private(self);
struct tilcdcfb_attach_args * const tfa = aux;
sc->sc_dev = self;
sc->sc_tfa = *tfa;
sc->sc_fb = to_tilcdc_framebuffer(tfa->tfa_fb_helper->fb);
aprint_naive("\n");
aprint_normal("\n");
tilcdc_task_init(&sc->sc_attach_task, &tilcdc_fb_init);
tilcdc_task_schedule(parent, &sc->sc_attach_task);
}
static void
tilcdc_fb_init(struct tilcdc_drm_task *task)
{
struct ti_fb_softc *sc = container_of(task, struct ti_fb_softc,
sc_attach_task);
device_t self = sc->sc_dev;
struct tilcdcfb_attach_args * const tfa = &sc->sc_tfa;
const struct drmfb_attach_args da = {
.da_dev = self,
.da_fb_helper = tfa->tfa_fb_helper,
.da_fb_sizes = &tfa->tfa_fb_sizes,
.da_fb_vaddr = sc->sc_fb->obj->vaddr,
.da_fb_linebytes = tfa->tfa_fb_linebytes,
.da_params = &tifb_drmfb_params,
};
int error;
error = drmfb_attach(&sc->sc_drmfb, &da);
if (error) {
aprint_error_dev(self, "failed to attach drmfb: %d\n", error);
return;
}
pmf_device_register1(self, NULL, NULL, ti_fb_shutdown);
}
static bool
ti_fb_shutdown(device_t self, int flags)
{
struct ti_fb_softc * const sc = device_private(self);
return drmfb_shutdown(&sc->sc_drmfb, flags);
}
static paddr_t
ti_fb_mmapfb(struct drmfb_softc *sc, off_t off, int prot)
{
struct ti_fb_softc * const tfb_sc = (struct ti_fb_softc *)sc;
struct drm_gem_cma_object *obj = tfb_sc->sc_fb->obj;
KASSERT(off >= 0);
KASSERT(off < obj->dmasize);
return bus_dmamem_mmap(obj->dmat, obj->dmasegs, 1, off, prot,
BUS_DMA_PREFETCHABLE);
}
static int
ti_fb_ioctl(struct drmfb_softc *sc, u_long cmd, void *data, int flag,
lwp_t *l)
{
struct wsdisplayio_bus_id *busid;
struct wsdisplayio_fbinfo *fbi;
struct rasops_info *ri = &sc->sc_genfb.vd.active->scr_ri;
int error;
switch (cmd) {
case WSDISPLAYIO_GET_BUSID:
busid = data;
busid->bus_type = WSDISPLAYIO_BUS_SOC;
return 0;
case WSDISPLAYIO_GTYPE:
*(u_int *)data = WSDISPLAY_TYPE_GENFB;
return 0;
case WSDISPLAYIO_GET_FBINFO:
fbi = data;
error = wsdisplayio_get_fbinfo(ri, fbi);
fbi->fbi_flags |= WSFB_VRAM_IS_RAM;
return error;
default:
return EPASSTHROUGH;
}
}
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