1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org> 5 * Copyright (c) 2012, 2013 The FreeBSD Foundation 6 * All rights reserved. 7 * 8 * Portions of this software were developed by Oleksandr Rybalko 9 * under sponsorship from the FreeBSD Foundation. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 */ 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/bio.h> 39 #include <sys/bus.h> 40 #include <sys/fbio.h> 41 #include <sys/kernel.h> 42 #include <sys/malloc.h> 43 #include <sys/module.h> 44 45 #include <vm/vm.h> 46 #include <vm/pmap.h> 47 48 #include <dev/ofw/ofw_bus.h> 49 #include <dev/ofw/ofw_bus_subr.h> 50 51 #include <dev/fb/fbreg.h> 52 #include <dev/vt/vt.h> 53 #include <dev/vt/colors/vt_termcolors.h> 54 55 #include <arm/broadcom/bcm2835/bcm2835_mbox_prop.h> 56 57 #include "fb_if.h" 58 #include "mbox_if.h" 59 60 #define FB_DEPTH 24 61 62 struct bcmsc_softc { 63 struct fb_info info; 64 int fbswap; 65 struct bcm2835_fb_config fb; 66 device_t dev; 67 }; 68 69 static struct ofw_compat_data compat_data[] = { 70 {"broadcom,bcm2835-fb", 1}, 71 {"brcm,bcm2708-fb", 1}, 72 {NULL, 0} 73 }; 74 75 static int bcm_fb_probe(device_t); 76 static int bcm_fb_attach(device_t); 77 78 static int 79 bcm_fb_init(struct bcmsc_softc *sc, struct bcm2835_fb_config *fb) 80 { 81 int err; 82 83 err = 0; 84 85 memset(fb, 0, sizeof(*fb)); 86 if (bcm2835_mbox_fb_get_w_h(fb) != 0) 87 return (ENXIO); 88 if (bcm2835_mbox_fb_get_bpp(fb) != 0) 89 return (ENXIO); 90 if (fb->bpp < FB_DEPTH) { 91 device_printf(sc->dev, "changing fb bpp from %d to %d\n", 92 fb->bpp, FB_DEPTH); 93 fb->bpp = FB_DEPTH; 94 } else 95 device_printf(sc->dev, "keeping existing fb bpp of %d\n", 96 fb->bpp); 97 98 fb->vxres = fb->xres; 99 fb->vyres = fb->yres; 100 fb->xoffset = fb->yoffset = 0; 101 102 if ((err = bcm2835_mbox_fb_init(fb)) != 0) { 103 device_printf(sc->dev, "bcm2835_mbox_fb_init failed, err=%d\n", 104 err); 105 return (ENXIO); 106 } 107 108 return (0); 109 } 110 111 static int 112 bcm_fb_setup_fbd(struct bcmsc_softc *sc) 113 { 114 struct bcm2835_fb_config fb; 115 device_t fbd; 116 int err; 117 118 err = bcm_fb_init(sc, &fb); 119 if (err) 120 return (err); 121 122 memset(&sc->info, 0, sizeof(sc->info)); 123 sc->info.fb_name = device_get_nameunit(sc->dev); 124 125 sc->info.fb_vbase = (intptr_t)pmap_mapdev(fb.base, fb.size); 126 sc->info.fb_pbase = fb.base; 127 sc->info.fb_size = fb.size; 128 sc->info.fb_bpp = sc->info.fb_depth = fb.bpp; 129 sc->info.fb_stride = fb.pitch; 130 sc->info.fb_width = fb.xres; 131 sc->info.fb_height = fb.yres; 132 #ifdef VM_MEMATTR_WRITE_COMBINING 133 sc->info.fb_flags = FB_FLAG_MEMATTR; 134 sc->info.fb_memattr = VM_MEMATTR_WRITE_COMBINING; 135 #endif 136 137 if (sc->fbswap) { 138 switch (sc->info.fb_bpp) { 139 case 24: 140 vt_config_cons_colors(&sc->info, 141 COLOR_FORMAT_RGB, 0xff, 0, 0xff, 8, 0xff, 16); 142 sc->info.fb_cmsize = 16; 143 break; 144 case 32: 145 vt_config_cons_colors(&sc->info, 146 COLOR_FORMAT_RGB, 0xff, 16, 0xff, 8, 0xff, 0); 147 sc->info.fb_cmsize = 16; 148 break; 149 } 150 } 151 152 fbd = device_add_child(sc->dev, "fbd", device_get_unit(sc->dev)); 153 if (fbd == NULL) { 154 device_printf(sc->dev, "Failed to add fbd child\n"); 155 pmap_unmapdev(sc->info.fb_vbase, sc->info.fb_size); 156 return (ENXIO); 157 } else if (device_probe_and_attach(fbd) != 0) { 158 device_printf(sc->dev, "Failed to attach fbd device\n"); 159 device_delete_child(sc->dev, fbd); 160 pmap_unmapdev(sc->info.fb_vbase, sc->info.fb_size); 161 return (ENXIO); 162 } 163 164 device_printf(sc->dev, "%dx%d(%dx%d@%d,%d) %dbpp\n", fb.xres, fb.yres, 165 fb.vxres, fb.vyres, fb.xoffset, fb.yoffset, fb.bpp); 166 device_printf(sc->dev, 167 "fbswap: %d, pitch %d, base 0x%08x, screen_size %d\n", 168 sc->fbswap, fb.pitch, fb.base, fb.size); 169 170 return (0); 171 } 172 173 static int 174 bcm_fb_resync_sysctl(SYSCTL_HANDLER_ARGS) 175 { 176 struct bcmsc_softc *sc = arg1; 177 struct bcm2835_fb_config fb; 178 int val; 179 int err; 180 181 val = 0; 182 err = sysctl_handle_int(oidp, &val, 0, req); 183 if (err || !req->newptr) /* error || read request */ 184 return (err); 185 186 bcm_fb_init(sc, &fb); 187 188 return (0); 189 } 190 191 static void 192 bcm_fb_sysctl_init(struct bcmsc_softc *sc) 193 { 194 struct sysctl_ctx_list *ctx; 195 struct sysctl_oid *tree_node; 196 struct sysctl_oid_list *tree; 197 198 /* 199 * Add system sysctl tree/handlers. 200 */ 201 ctx = device_get_sysctl_ctx(sc->dev); 202 tree_node = device_get_sysctl_tree(sc->dev); 203 tree = SYSCTL_CHILDREN(tree_node); 204 SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "resync", 205 CTLFLAG_RW | CTLTYPE_UINT | CTLFLAG_NEEDGIANT, sc, sizeof(*sc), 206 bcm_fb_resync_sysctl, "IU", "Set to resync framebuffer with VC"); 207 } 208 209 static int 210 bcm_fb_probe(device_t dev) 211 { 212 213 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 214 return (ENXIO); 215 216 device_set_desc(dev, "BCM2835 VT framebuffer driver"); 217 218 return (BUS_PROBE_DEFAULT); 219 } 220 221 static int 222 bcm_fb_attach(device_t dev) 223 { 224 char bootargs[2048], *n, *p, *v; 225 int err; 226 phandle_t chosen; 227 struct bcmsc_softc *sc; 228 229 sc = device_get_softc(dev); 230 sc->dev = dev; 231 232 /* Newer firmware versions needs an inverted color palette. */ 233 sc->fbswap = 0; 234 chosen = OF_finddevice("/chosen"); 235 if (chosen != -1 && 236 OF_getprop(chosen, "bootargs", &bootargs, sizeof(bootargs)) > 0) { 237 p = bootargs; 238 while ((v = strsep(&p, " ")) != NULL) { 239 if (*v == '\0') 240 continue; 241 n = strsep(&v, "="); 242 if (strcmp(n, "bcm2708_fb.fbswap") == 0 && v != NULL) 243 if (*v == '1') 244 sc->fbswap = 1; 245 } 246 } 247 248 bcm_fb_sysctl_init(sc); 249 250 err = bcm_fb_setup_fbd(sc); 251 if (err) 252 return (err); 253 254 return (0); 255 } 256 257 static struct fb_info * 258 bcm_fb_helper_getinfo(device_t dev) 259 { 260 struct bcmsc_softc *sc; 261 262 sc = device_get_softc(dev); 263 264 return (&sc->info); 265 } 266 267 static device_method_t bcm_fb_methods[] = { 268 /* Device interface */ 269 DEVMETHOD(device_probe, bcm_fb_probe), 270 DEVMETHOD(device_attach, bcm_fb_attach), 271 272 /* Framebuffer service methods */ 273 DEVMETHOD(fb_getinfo, bcm_fb_helper_getinfo), 274 275 DEVMETHOD_END 276 }; 277 278 static driver_t bcm_fb_driver = { 279 "fb", 280 bcm_fb_methods, 281 sizeof(struct bcmsc_softc), 282 }; 283 284 DRIVER_MODULE(bcm2835fb, ofwbus, bcm_fb_driver, 0, 0); 285 DRIVER_MODULE(bcm2835fb, simplebus, bcm_fb_driver, 0, 0); 286