1 /* $NetBSD: tegra_fb.c,v 1.2 2015/11/12 00:43:52 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2015 Jared D. 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 <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: tegra_fb.c,v 1.2 2015/11/12 00:43:52 jmcneill Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/device.h> 35 36 #include <drm/drmP.h> 37 #include <drm/drmfb.h> 38 39 #include <arm/nvidia/tegra_var.h> 40 #include <arm/nvidia/tegra_drm.h> 41 42 static int tegra_fb_match(device_t, cfdata_t, void *); 43 static void tegra_fb_attach(device_t, device_t, void *); 44 45 static bool tegra_fb_shutdown(device_t, int); 46 47 struct tegra_fb_softc { 48 struct drmfb_softc sc_drmfb; 49 device_t sc_dev; 50 struct tegra_drm_softc *sc_drm; 51 struct tegra_drmfb_attach_args sc_tfa; 52 struct tegra_framebuffer *sc_fb; 53 }; 54 55 static paddr_t tegra_fb_mmapfb(struct drmfb_softc *, off_t, int); 56 static int tegra_fb_ioctl(struct drmfb_softc *, u_long, void *, int, 57 lwp_t *); 58 59 60 static const struct drmfb_params tegrafb_drmfb_params = { 61 .dp_mmapfb = tegra_fb_mmapfb, 62 .dp_ioctl = tegra_fb_ioctl, 63 64 }; 65 66 CFATTACH_DECL_NEW(tegra_fb, sizeof(struct tegra_fb_softc), 67 tegra_fb_match, tegra_fb_attach, NULL, NULL); 68 69 static int 70 tegra_fb_match(device_t parent, cfdata_t cf, void *aux) 71 { 72 return 1; 73 } 74 75 static void 76 tegra_fb_attach(device_t parent, device_t self, void *aux) 77 { 78 struct tegra_fb_softc * const sc = device_private(self); 79 struct tegra_drm_softc * const drmsc = device_private(parent); 80 struct tegra_drmfb_attach_args * const tfa = aux; 81 struct drmfb_attach_args da; 82 int error; 83 84 sc->sc_dev = self; 85 sc->sc_drm = drmsc; 86 sc->sc_tfa = *tfa; 87 sc->sc_fb = to_tegra_framebuffer(tfa->tfa_fb_helper->fb); 88 89 aprint_naive("\n"); 90 aprint_normal("\n"); 91 92 da.da_dev = self; 93 da.da_fb_helper = tfa->tfa_fb_helper; 94 da.da_fb_sizes = &tfa->tfa_fb_sizes; 95 da.da_fb_vaddr = sc->sc_fb->obj->dmap; 96 da.da_params = &tegrafb_drmfb_params; 97 98 error = drmfb_attach(&sc->sc_drmfb, &da); 99 if (error) { 100 aprint_error_dev(self, "failed to attach drmfb: %d\n", error); 101 return; 102 } 103 104 pmf_device_register1(self, NULL, NULL, tegra_fb_shutdown); 105 } 106 107 static bool 108 tegra_fb_shutdown(device_t self, int flags) 109 { 110 struct tegra_fb_softc * const sc = device_private(self); 111 112 return drmfb_shutdown(&sc->sc_drmfb, flags); 113 } 114 115 static paddr_t 116 tegra_fb_mmapfb(struct drmfb_softc *sc, off_t off, int prot) 117 { 118 struct tegra_fb_softc * const tfb_sc = (struct tegra_fb_softc *)sc; 119 struct tegra_gem_object *obj = tfb_sc->sc_fb->obj; 120 121 KASSERT(off >= 0); 122 KASSERT(off < obj->dmasize); 123 124 return bus_dmamem_mmap(obj->dmat, obj->dmasegs, 1, off, prot, 125 BUS_DMA_PREFETCHABLE); 126 } 127 128 static int 129 tegra_fb_ioctl(struct drmfb_softc *sc, u_long cmd, void *data, int flag, 130 lwp_t *l) 131 { 132 struct wsdisplayio_bus_id *busid; 133 struct wsdisplayio_fbinfo *fbi; 134 struct rasops_info *ri = &sc->sc_genfb.vd.active->scr_ri; 135 int error; 136 137 switch (cmd) { 138 case WSDISPLAYIO_GET_BUSID: 139 busid = data; 140 busid->bus_type = WSDISPLAYIO_BUS_SOC; 141 return 0; 142 case WSDISPLAYIO_GTYPE: 143 *(u_int *)data = WSDISPLAY_TYPE_TEGRA; 144 return 0; 145 case WSDISPLAYIO_GET_FBINFO: 146 fbi = data; 147 error = wsdisplayio_get_fbinfo(ri, fbi); 148 fbi->fbi_flags |= WSFB_VRAM_IS_RAM; 149 return error; 150 default: 151 return EPASSTHROUGH; 152 } 153 } 154