1 /* $NetBSD: ti_fb.c,v 1.1 2019/11/03 22:59:06 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: ti_fb.c,v 1.1 2019/11/03 22:59:06 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 #include <dev/fdt/fdt_port.h> 40 41 #include <drm/drmP.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 bool ti_fb_shutdown(device_t, int); 50 51 struct ti_fb_softc { 52 struct drmfb_softc sc_drmfb; 53 device_t sc_dev; 54 struct tilcdc_framebuffer *sc_fb; 55 struct tilcdcfb_attach_args sc_tfa; 56 }; 57 58 static paddr_t ti_fb_mmapfb(struct drmfb_softc *, off_t, int); 59 static int ti_fb_ioctl(struct drmfb_softc *, u_long, void *, int, 60 lwp_t *); 61 62 static const struct drmfb_params tifb_drmfb_params = { 63 .dp_mmapfb = ti_fb_mmapfb, 64 .dp_ioctl = ti_fb_ioctl, 65 66 }; 67 68 CFATTACH_DECL_NEW(ti_fb, sizeof(struct ti_fb_softc), 69 ti_fb_match, ti_fb_attach, NULL, NULL); 70 71 static int 72 ti_fb_match(device_t parent, cfdata_t cf, void *aux) 73 { 74 return 1; 75 } 76 77 static void 78 ti_fb_attach(device_t parent, device_t self, void *aux) 79 { 80 struct ti_fb_softc * const sc = device_private(self); 81 struct tilcdcfb_attach_args * const tfa = aux; 82 int error; 83 84 sc->sc_dev = self; 85 sc->sc_tfa = *tfa; 86 sc->sc_fb = to_tilcdc_framebuffer(tfa->tfa_fb_helper->fb); 87 88 aprint_naive("\n"); 89 aprint_normal("\n"); 90 91 #ifdef WSDISPLAY_MULTICONS 92 prop_dictionary_t dict = device_properties(self); 93 const bool is_console = true; 94 prop_dictionary_set_bool(dict, "is_console", is_console); 95 #endif 96 97 const struct drmfb_attach_args da = { 98 .da_dev = self, 99 .da_fb_helper = tfa->tfa_fb_helper, 100 .da_fb_sizes = &tfa->tfa_fb_sizes, 101 .da_fb_vaddr = sc->sc_fb->obj->vaddr, 102 .da_fb_linebytes = tfa->tfa_fb_linebytes, 103 .da_params = &tifb_drmfb_params, 104 }; 105 106 error = drmfb_attach(&sc->sc_drmfb, &da); 107 if (error) { 108 aprint_error_dev(self, "failed to attach drmfb: %d\n", error); 109 return; 110 } 111 112 pmf_device_register1(self, NULL, NULL, ti_fb_shutdown); 113 } 114 115 static bool 116 ti_fb_shutdown(device_t self, int flags) 117 { 118 struct ti_fb_softc * const sc = device_private(self); 119 120 return drmfb_shutdown(&sc->sc_drmfb, flags); 121 } 122 123 static paddr_t 124 ti_fb_mmapfb(struct drmfb_softc *sc, off_t off, int prot) 125 { 126 struct ti_fb_softc * const tfb_sc = (struct ti_fb_softc *)sc; 127 struct drm_gem_cma_object *obj = tfb_sc->sc_fb->obj; 128 129 KASSERT(off >= 0); 130 KASSERT(off < obj->dmasize); 131 132 return bus_dmamem_mmap(obj->dmat, obj->dmasegs, 1, off, prot, 133 BUS_DMA_PREFETCHABLE); 134 } 135 136 static int 137 ti_fb_ioctl(struct drmfb_softc *sc, u_long cmd, void *data, int flag, 138 lwp_t *l) 139 { 140 struct wsdisplayio_bus_id *busid; 141 struct wsdisplayio_fbinfo *fbi; 142 struct rasops_info *ri = &sc->sc_genfb.vd.active->scr_ri; 143 int error; 144 145 switch (cmd) { 146 case WSDISPLAYIO_GET_BUSID: 147 busid = data; 148 busid->bus_type = WSDISPLAYIO_BUS_SOC; 149 return 0; 150 case WSDISPLAYIO_GTYPE: 151 *(u_int *)data = WSDISPLAY_TYPE_GENFB; 152 return 0; 153 case WSDISPLAYIO_GET_FBINFO: 154 fbi = data; 155 error = wsdisplayio_get_fbinfo(ri, fbi); 156 fbi->fbi_flags |= WSFB_VRAM_IS_RAM; 157 return error; 158 default: 159 return EPASSTHROUGH; 160 } 161 } 162