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/ofw/ofw_bus.h> 47 #include <dev/ofw/ofw_bus_subr.h> 48 49 #include <dev/fb/fbreg.h> 50 #include <dev/vt/vt.h> 51 #include <dev/vt/colors/vt_termcolors.h> 52 53 #include <arm/broadcom/bcm2835/bcm2835_mbox_prop.h> 54 55 #include "fb_if.h" 56 #include "mbox_if.h" 57 58 #define FB_DEPTH 24 59 60 struct bcmsc_softc { 61 struct fb_info info; 62 int fbswap; 63 struct bcm2835_fb_config fb; 64 device_t dev; 65 }; 66 67 static struct ofw_compat_data compat_data[] = { 68 {"broadcom,bcm2835-fb", 1}, 69 {"brcm,bcm2708-fb", 1}, 70 {NULL, 0} 71 }; 72 73 static int bcm_fb_probe(device_t); 74 static int bcm_fb_attach(device_t); 75 76 static int 77 bcm_fb_init(struct bcmsc_softc *sc, struct bcm2835_fb_config *fb) 78 { 79 int err; 80 81 err = 0; 82 83 memset(fb, 0, sizeof(*fb)); 84 if (bcm2835_mbox_fb_get_w_h(fb) != 0) 85 return (ENXIO); 86 fb->bpp = FB_DEPTH; 87 88 fb->vxres = fb->xres; 89 fb->vyres = fb->yres; 90 fb->xoffset = fb->yoffset = 0; 91 92 if ((err = bcm2835_mbox_fb_init(fb)) != 0) { 93 device_printf(sc->dev, "bcm2835_mbox_fb_init failed, err=%d\n", err); 94 return (ENXIO); 95 } 96 97 return (0); 98 } 99 100 static int 101 bcm_fb_setup_fbd(struct bcmsc_softc *sc) 102 { 103 struct bcm2835_fb_config fb; 104 device_t fbd; 105 int err; 106 107 err = bcm_fb_init(sc, &fb); 108 if (err) 109 return (err); 110 111 memset(&sc->info, 0, sizeof(sc->info)); 112 sc->info.fb_name = device_get_nameunit(sc->dev); 113 114 sc->info.fb_vbase = (intptr_t)pmap_mapdev(fb.base, fb.size); 115 sc->info.fb_pbase = fb.base; 116 sc->info.fb_size = fb.size; 117 sc->info.fb_bpp = sc->info.fb_depth = fb.bpp; 118 sc->info.fb_stride = fb.pitch; 119 sc->info.fb_width = fb.xres; 120 sc->info.fb_height = fb.yres; 121 #ifdef VM_MEMATTR_WRITE_COMBINING 122 sc->info.fb_flags = FB_FLAG_MEMATTR; 123 sc->info.fb_memattr = VM_MEMATTR_WRITE_COMBINING; 124 #endif 125 126 if (sc->fbswap) { 127 switch (sc->info.fb_bpp) { 128 case 24: 129 vt_generate_cons_palette(sc->info.fb_cmap, 130 COLOR_FORMAT_RGB, 0xff, 0, 0xff, 8, 0xff, 16); 131 sc->info.fb_cmsize = 16; 132 break; 133 case 32: 134 vt_generate_cons_palette(sc->info.fb_cmap, 135 COLOR_FORMAT_RGB, 0xff, 16, 0xff, 8, 0xff, 0); 136 sc->info.fb_cmsize = 16; 137 break; 138 } 139 } 140 141 fbd = device_add_child(sc->dev, "fbd", device_get_unit(sc->dev)); 142 if (fbd == NULL) { 143 device_printf(sc->dev, "Failed to add fbd child\n"); 144 pmap_unmapdev(sc->info.fb_vbase, sc->info.fb_size); 145 return (ENXIO); 146 } else if (device_probe_and_attach(fbd) != 0) { 147 device_printf(sc->dev, "Failed to attach fbd device\n"); 148 device_delete_child(sc->dev, fbd); 149 pmap_unmapdev(sc->info.fb_vbase, sc->info.fb_size); 150 return (ENXIO); 151 } 152 153 device_printf(sc->dev, "%dx%d(%dx%d@%d,%d) %dbpp\n", fb.xres, fb.yres, 154 fb.vxres, fb.vyres, fb.xoffset, fb.yoffset, fb.bpp); 155 device_printf(sc->dev, 156 "fbswap: %d, pitch %d, base 0x%08x, screen_size %d\n", 157 sc->fbswap, fb.pitch, fb.base, fb.size); 158 159 return (0); 160 } 161 162 static int 163 bcm_fb_resync_sysctl(SYSCTL_HANDLER_ARGS) 164 { 165 struct bcmsc_softc *sc = arg1; 166 struct bcm2835_fb_config fb; 167 int val; 168 int err; 169 170 val = 0; 171 err = sysctl_handle_int(oidp, &val, 0, req); 172 if (err || !req->newptr) /* error || read request */ 173 return (err); 174 175 bcm_fb_init(sc, &fb); 176 177 return (0); 178 } 179 180 static void 181 bcm_fb_sysctl_init(struct bcmsc_softc *sc) 182 { 183 struct sysctl_ctx_list *ctx; 184 struct sysctl_oid *tree_node; 185 struct sysctl_oid_list *tree; 186 187 /* 188 * Add system sysctl tree/handlers. 189 */ 190 ctx = device_get_sysctl_ctx(sc->dev); 191 tree_node = device_get_sysctl_tree(sc->dev); 192 tree = SYSCTL_CHILDREN(tree_node); 193 SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "resync", 194 CTLFLAG_RW | CTLTYPE_UINT, sc, sizeof(*sc), 195 bcm_fb_resync_sysctl, "IU", "Set to resync framebuffer with VC"); 196 } 197 198 static int 199 bcm_fb_probe(device_t dev) 200 { 201 202 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 203 return (ENXIO); 204 205 device_set_desc(dev, "BCM2835 VT framebuffer driver"); 206 207 return (BUS_PROBE_DEFAULT); 208 } 209 210 static int 211 bcm_fb_attach(device_t dev) 212 { 213 char bootargs[2048], *n, *p, *v; 214 int err; 215 phandle_t chosen; 216 struct bcmsc_softc *sc; 217 218 sc = device_get_softc(dev); 219 sc->dev = dev; 220 221 /* Newer firmware versions needs an inverted color palette. */ 222 sc->fbswap = 0; 223 chosen = OF_finddevice("/chosen"); 224 if (chosen != 0 && 225 OF_getprop(chosen, "bootargs", &bootargs, sizeof(bootargs)) > 0) { 226 p = bootargs; 227 while ((v = strsep(&p, " ")) != NULL) { 228 if (*v == '\0') 229 continue; 230 n = strsep(&v, "="); 231 if (strcmp(n, "bcm2708_fb.fbswap") == 0 && v != NULL) 232 if (*v == '1') 233 sc->fbswap = 1; 234 } 235 } 236 237 bcm_fb_sysctl_init(sc); 238 239 err = bcm_fb_setup_fbd(sc); 240 if (err) 241 return (err); 242 243 return (0); 244 } 245 246 static struct fb_info * 247 bcm_fb_helper_getinfo(device_t dev) 248 { 249 struct bcmsc_softc *sc; 250 251 sc = device_get_softc(dev); 252 253 return (&sc->info); 254 } 255 256 static device_method_t bcm_fb_methods[] = { 257 /* Device interface */ 258 DEVMETHOD(device_probe, bcm_fb_probe), 259 DEVMETHOD(device_attach, bcm_fb_attach), 260 261 /* Framebuffer service methods */ 262 DEVMETHOD(fb_getinfo, bcm_fb_helper_getinfo), 263 264 DEVMETHOD_END 265 }; 266 267 static devclass_t bcm_fb_devclass; 268 269 static driver_t bcm_fb_driver = { 270 "fb", 271 bcm_fb_methods, 272 sizeof(struct bcmsc_softc), 273 }; 274 275 DRIVER_MODULE(bcm2835fb, ofwbus, bcm_fb_driver, bcm_fb_devclass, 0, 0); 276 DRIVER_MODULE(bcm2835fb, simplebus, bcm_fb_driver, bcm_fb_devclass, 0, 0); 277