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@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 46static int ti_fb_match(device_t, cfdata_t, void *); 47static void ti_fb_attach(device_t, device_t, void *); 48 49static void tilcdc_fb_init(struct tilcdc_drm_task *); 50 51static bool ti_fb_shutdown(device_t, int); 52 53struct 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 61static paddr_t ti_fb_mmapfb(struct drmfb_softc *, off_t, int); 62static int ti_fb_ioctl(struct drmfb_softc *, u_long, void *, int, 63 lwp_t *); 64 65static const struct drmfb_params tifb_drmfb_params = { 66 .dp_mmapfb = ti_fb_mmapfb, 67 .dp_ioctl = ti_fb_ioctl, 68}; 69 70CFATTACH_DECL_NEW(ti_fb, sizeof(struct ti_fb_softc), 71 ti_fb_match, ti_fb_attach, NULL, NULL); 72 73static int 74ti_fb_match(device_t parent, cfdata_t cf, void *aux) 75{ 76 return 1; 77} 78 79static void 80ti_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 96static void 97tilcdc_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 122static bool 123ti_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 130static paddr_t 131ti_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 143static int 144ti_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