1 /*- 2 * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org> 3 * Copyright (c) 2012, 2013 The FreeBSD Foundation 4 * All rights reserved. 5 * 6 * Portions of this software were developed by Oleksandr Rybalko 7 * under sponsorship from the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 */ 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/bio.h> 37 #include <sys/bus.h> 38 #include <sys/fbio.h> 39 #include <sys/kernel.h> 40 #include <sys/malloc.h> 41 #include <sys/module.h> 42 43 #include <vm/vm.h> 44 #include <vm/pmap.h> 45 46 #include <dev/fdt/fdt_common.h> 47 #include <dev/ofw/ofw_bus.h> 48 #include <dev/ofw/ofw_bus_subr.h> 49 50 #include <dev/fb/fbreg.h> 51 #include <dev/vt/vt.h> 52 #include <dev/vt/colors/vt_termcolors.h> 53 54 #include <arm/broadcom/bcm2835/bcm2835_mbox_prop.h> 55 56 #include "fb_if.h" 57 #include "mbox_if.h" 58 59 #define FB_DEPTH 24 60 61 struct bcmsc_softc { 62 struct fb_info *info; 63 }; 64 65 static int bcm_fb_probe(device_t); 66 static int bcm_fb_attach(device_t); 67 68 static int 69 bcm_fb_probe(device_t dev) 70 { 71 if (!ofw_bus_is_compatible(dev, "broadcom,bcm2835-fb")) 72 return (ENXIO); 73 74 device_set_desc(dev, "BCM2835 VT framebuffer driver"); 75 76 return (BUS_PROBE_DEFAULT); 77 } 78 79 static int 80 bcm_fb_attach(device_t dev) 81 { 82 char bootargs[2048], *n, *p, *v; 83 device_t fbd; 84 int fbswap; 85 phandle_t chosen; 86 struct bcm2835_fb_config fb; 87 struct bcmsc_softc *sc; 88 struct fb_info *info; 89 90 sc = device_get_softc(dev); 91 memset(&fb, 0, sizeof(fb)); 92 if (bcm2835_mbox_fb_get_w_h(dev, &fb) != 0) 93 return (ENXIO); 94 fb.bpp = FB_DEPTH; 95 if (bcm2835_mbox_fb_init(dev, &fb) != 0) 96 return (ENXIO); 97 98 info = malloc(sizeof(struct fb_info), M_DEVBUF, M_WAITOK | M_ZERO); 99 info->fb_name = device_get_nameunit(dev); 100 info->fb_vbase = (intptr_t)pmap_mapdev(fb.base, fb.size); 101 info->fb_pbase = fb.base; 102 info->fb_size = fb.size; 103 info->fb_bpp = info->fb_depth = fb.bpp; 104 info->fb_stride = fb.pitch; 105 info->fb_width = fb.xres; 106 info->fb_height = fb.yres; 107 sc->info = info; 108 109 /* Newer firmware versions needs an inverted color palette. */ 110 fbswap = 0; 111 chosen = OF_finddevice("/chosen"); 112 if (chosen != 0 && 113 OF_getprop(chosen, "bootargs", &bootargs, sizeof(bootargs)) > 0) { 114 p = bootargs; 115 while ((v = strsep(&p, " ")) != NULL) { 116 if (*v == '\0') 117 continue; 118 n = strsep(&v, "="); 119 if (strcmp(n, "bcm2708_fb.fbswap") == 0 && v != NULL) 120 if (*v == '1') 121 fbswap = 1; 122 } 123 } 124 if (fbswap) { 125 switch (info->fb_bpp) { 126 case 24: 127 vt_generate_cons_palette(info->fb_cmap, 128 COLOR_FORMAT_RGB, 0xff, 0, 0xff, 8, 0xff, 16); 129 info->fb_cmsize = 16; 130 break; 131 case 32: 132 vt_generate_cons_palette(info->fb_cmap, 133 COLOR_FORMAT_RGB, 0xff, 16, 0xff, 8, 0xff, 0); 134 info->fb_cmsize = 16; 135 break; 136 } 137 } 138 139 fbd = device_add_child(dev, "fbd", device_get_unit(dev)); 140 if (fbd == NULL) { 141 device_printf(dev, "Failed to add fbd child\n"); 142 free(info, M_DEVBUF); 143 return (ENXIO); 144 } else if (device_probe_and_attach(fbd) != 0) { 145 device_printf(dev, "Failed to attach fbd device\n"); 146 device_delete_child(dev, fbd); 147 free(info, M_DEVBUF); 148 return (ENXIO); 149 } 150 151 device_printf(dev, "%dx%d(%dx%d@%d,%d) %dbpp\n", fb.xres, fb.yres, 152 fb.vxres, fb.vyres, fb.xoffset, fb.yoffset, fb.bpp); 153 device_printf(dev, 154 "fbswap: %d, pitch %d, base 0x%08x, screen_size %d\n", 155 fbswap, fb.pitch, fb.base, fb.size); 156 157 return (0); 158 } 159 160 static struct fb_info * 161 bcm_fb_helper_getinfo(device_t dev) 162 { 163 struct bcmsc_softc *sc; 164 165 sc = device_get_softc(dev); 166 167 return (sc->info); 168 } 169 170 static device_method_t bcm_fb_methods[] = { 171 /* Device interface */ 172 DEVMETHOD(device_probe, bcm_fb_probe), 173 DEVMETHOD(device_attach, bcm_fb_attach), 174 175 /* Framebuffer service methods */ 176 DEVMETHOD(fb_getinfo, bcm_fb_helper_getinfo), 177 178 DEVMETHOD_END 179 }; 180 181 static devclass_t bcm_fb_devclass; 182 183 static driver_t bcm_fb_driver = { 184 "fb", 185 bcm_fb_methods, 186 sizeof(struct bcmsc_softc), 187 }; 188 189 DRIVER_MODULE(bcm2835fb, ofwbus, bcm_fb_driver, bcm_fb_devclass, 0, 0); 190