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 int fbswap; 64 struct bcm2835_fb_config fb; 65 device_t dev; 66 }; 67 68 static int bcm_fb_probe(device_t); 69 static int bcm_fb_attach(device_t); 70 71 static int 72 bcm_fb_init(struct bcmsc_softc *sc, struct bcm2835_fb_config *fb) 73 { 74 int err; 75 76 err = 0; 77 78 memset(fb, 0, sizeof(*fb)); 79 if (bcm2835_mbox_fb_get_w_h(fb) != 0) 80 return (ENXIO); 81 fb->bpp = FB_DEPTH; 82 83 fb->vxres = fb->xres; 84 fb->vyres = fb->yres; 85 fb->xoffset = fb->yoffset = 0; 86 87 if ((err = bcm2835_mbox_fb_init(fb)) != 0) { 88 device_printf(sc->dev, "bcm2835_mbox_fb_init failed, err=%d\n", err); 89 return (ENXIO); 90 } 91 92 return (0); 93 } 94 95 static int 96 bcm_fb_setup_fbd(struct bcmsc_softc *sc) 97 { 98 struct bcm2835_fb_config fb; 99 device_t fbd; 100 int err; 101 102 err = bcm_fb_init(sc, &fb); 103 if (err) 104 return (err); 105 106 memset(&sc->info, 0, sizeof(sc->info)); 107 sc->info.fb_name = device_get_nameunit(sc->dev); 108 109 sc->info.fb_vbase = (intptr_t)pmap_mapdev(fb.base, fb.size); 110 sc->info.fb_pbase = fb.base; 111 sc->info.fb_size = fb.size; 112 sc->info.fb_bpp = sc->info.fb_depth = fb.bpp; 113 sc->info.fb_stride = fb.pitch; 114 sc->info.fb_width = fb.xres; 115 sc->info.fb_height = fb.yres; 116 117 if (sc->fbswap) { 118 switch (sc->info.fb_bpp) { 119 case 24: 120 vt_generate_cons_palette(sc->info.fb_cmap, 121 COLOR_FORMAT_RGB, 0xff, 0, 0xff, 8, 0xff, 16); 122 sc->info.fb_cmsize = 16; 123 break; 124 case 32: 125 vt_generate_cons_palette(sc->info.fb_cmap, 126 COLOR_FORMAT_RGB, 0xff, 16, 0xff, 8, 0xff, 0); 127 sc->info.fb_cmsize = 16; 128 break; 129 } 130 } 131 132 fbd = device_add_child(sc->dev, "fbd", device_get_unit(sc->dev)); 133 if (fbd == NULL) { 134 device_printf(sc->dev, "Failed to add fbd child\n"); 135 pmap_unmapdev(sc->info.fb_vbase, sc->info.fb_size); 136 return (ENXIO); 137 } else if (device_probe_and_attach(fbd) != 0) { 138 device_printf(sc->dev, "Failed to attach fbd device\n"); 139 device_delete_child(sc->dev, fbd); 140 pmap_unmapdev(sc->info.fb_vbase, sc->info.fb_size); 141 return (ENXIO); 142 } 143 144 device_printf(sc->dev, "%dx%d(%dx%d@%d,%d) %dbpp\n", fb.xres, fb.yres, 145 fb.vxres, fb.vyres, fb.xoffset, fb.yoffset, fb.bpp); 146 device_printf(sc->dev, 147 "fbswap: %d, pitch %d, base 0x%08x, screen_size %d\n", 148 sc->fbswap, fb.pitch, fb.base, fb.size); 149 150 return (0); 151 } 152 153 static int 154 bcm_fb_resync_sysctl(SYSCTL_HANDLER_ARGS) 155 { 156 struct bcmsc_softc *sc = arg1; 157 struct bcm2835_fb_config fb; 158 int val; 159 int err; 160 161 val = 0; 162 err = sysctl_handle_int(oidp, &val, 0, req); 163 if (err || !req->newptr) /* error || read request */ 164 return (err); 165 166 bcm_fb_init(sc, &fb); 167 168 return (0); 169 } 170 171 static void 172 bcm_fb_sysctl_init(struct bcmsc_softc *sc) 173 { 174 struct sysctl_ctx_list *ctx; 175 struct sysctl_oid *tree_node; 176 struct sysctl_oid_list *tree; 177 178 /* 179 * Add system sysctl tree/handlers. 180 */ 181 ctx = device_get_sysctl_ctx(sc->dev); 182 tree_node = device_get_sysctl_tree(sc->dev); 183 tree = SYSCTL_CHILDREN(tree_node); 184 SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "resync", 185 CTLFLAG_RW | CTLTYPE_UINT, sc, sizeof(*sc), 186 bcm_fb_resync_sysctl, "IU", "Set to resync framebuffer with VC"); 187 } 188 189 static int 190 bcm_fb_probe(device_t dev) 191 { 192 if (!ofw_bus_is_compatible(dev, "broadcom,bcm2835-fb")) 193 return (ENXIO); 194 195 device_set_desc(dev, "BCM2835 VT framebuffer driver"); 196 197 return (BUS_PROBE_DEFAULT); 198 } 199 200 static int 201 bcm_fb_attach(device_t dev) 202 { 203 char bootargs[2048], *n, *p, *v; 204 int err; 205 phandle_t chosen; 206 struct bcmsc_softc *sc; 207 208 sc = device_get_softc(dev); 209 sc->dev = dev; 210 211 /* Newer firmware versions needs an inverted color palette. */ 212 sc->fbswap = 0; 213 chosen = OF_finddevice("/chosen"); 214 if (chosen != 0 && 215 OF_getprop(chosen, "bootargs", &bootargs, sizeof(bootargs)) > 0) { 216 p = bootargs; 217 while ((v = strsep(&p, " ")) != NULL) { 218 if (*v == '\0') 219 continue; 220 n = strsep(&v, "="); 221 if (strcmp(n, "bcm2708_fb.fbswap") == 0 && v != NULL) 222 if (*v == '1') 223 sc->fbswap = 1; 224 } 225 } 226 227 bcm_fb_sysctl_init(sc); 228 229 err = bcm_fb_setup_fbd(sc); 230 if (err) 231 return (err); 232 233 return (0); 234 } 235 236 static struct fb_info * 237 bcm_fb_helper_getinfo(device_t dev) 238 { 239 struct bcmsc_softc *sc; 240 241 sc = device_get_softc(dev); 242 243 return (&sc->info); 244 } 245 246 static device_method_t bcm_fb_methods[] = { 247 /* Device interface */ 248 DEVMETHOD(device_probe, bcm_fb_probe), 249 DEVMETHOD(device_attach, bcm_fb_attach), 250 251 /* Framebuffer service methods */ 252 DEVMETHOD(fb_getinfo, bcm_fb_helper_getinfo), 253 254 DEVMETHOD_END 255 }; 256 257 static devclass_t bcm_fb_devclass; 258 259 static driver_t bcm_fb_driver = { 260 "fb", 261 bcm_fb_methods, 262 sizeof(struct bcmsc_softc), 263 }; 264 265 DRIVER_MODULE(bcm2835fb, ofwbus, bcm_fb_driver, bcm_fb_devclass, 0, 0); 266