1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 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 if (bcm2835_mbox_fb_get_bpp(fb) != 0) 87 return (ENXIO); 88 if (fb->bpp < FB_DEPTH) { 89 device_printf(sc->dev, "changing fb bpp from %d to %d\n", 90 fb->bpp, FB_DEPTH); 91 fb->bpp = FB_DEPTH; 92 } else 93 device_printf(sc->dev, "keeping existing fb bpp of %d\n", 94 fb->bpp); 95 96 fb->vxres = fb->xres; 97 fb->vyres = fb->yres; 98 fb->xoffset = fb->yoffset = 0; 99 100 if ((err = bcm2835_mbox_fb_init(fb)) != 0) { 101 device_printf(sc->dev, "bcm2835_mbox_fb_init failed, err=%d\n", 102 err); 103 return (ENXIO); 104 } 105 106 return (0); 107 } 108 109 static int 110 bcm_fb_setup_fbd(struct bcmsc_softc *sc) 111 { 112 struct bcm2835_fb_config fb; 113 device_t fbd; 114 int err; 115 116 err = bcm_fb_init(sc, &fb); 117 if (err) 118 return (err); 119 120 memset(&sc->info, 0, sizeof(sc->info)); 121 sc->info.fb_name = device_get_nameunit(sc->dev); 122 123 sc->info.fb_vbase = (intptr_t)pmap_mapdev(fb.base, fb.size); 124 sc->info.fb_pbase = fb.base; 125 sc->info.fb_size = fb.size; 126 sc->info.fb_bpp = sc->info.fb_depth = fb.bpp; 127 sc->info.fb_stride = fb.pitch; 128 sc->info.fb_width = fb.xres; 129 sc->info.fb_height = fb.yres; 130 #ifdef VM_MEMATTR_WRITE_COMBINING 131 sc->info.fb_flags = FB_FLAG_MEMATTR; 132 sc->info.fb_memattr = VM_MEMATTR_WRITE_COMBINING; 133 #endif 134 135 if (sc->fbswap) { 136 switch (sc->info.fb_bpp) { 137 case 24: 138 vt_config_cons_colors(&sc->info, 139 COLOR_FORMAT_RGB, 0xff, 0, 0xff, 8, 0xff, 16); 140 sc->info.fb_cmsize = 16; 141 break; 142 case 32: 143 vt_config_cons_colors(&sc->info, 144 COLOR_FORMAT_RGB, 0xff, 16, 0xff, 8, 0xff, 0); 145 sc->info.fb_cmsize = 16; 146 break; 147 } 148 } 149 150 fbd = device_add_child(sc->dev, "fbd", device_get_unit(sc->dev)); 151 if (fbd == NULL) { 152 device_printf(sc->dev, "Failed to add fbd child\n"); 153 pmap_unmapdev((void *)sc->info.fb_vbase, sc->info.fb_size); 154 return (ENXIO); 155 } else if (device_probe_and_attach(fbd) != 0) { 156 device_printf(sc->dev, "Failed to attach fbd device\n"); 157 device_delete_child(sc->dev, fbd); 158 pmap_unmapdev((void *)sc->info.fb_vbase, sc->info.fb_size); 159 return (ENXIO); 160 } 161 162 device_printf(sc->dev, "%dx%d(%dx%d@%d,%d) %dbpp\n", fb.xres, fb.yres, 163 fb.vxres, fb.vyres, fb.xoffset, fb.yoffset, fb.bpp); 164 device_printf(sc->dev, 165 "fbswap: %d, pitch %d, base 0x%08x, screen_size %d\n", 166 sc->fbswap, fb.pitch, fb.base, fb.size); 167 168 return (0); 169 } 170 171 static int 172 bcm_fb_resync_sysctl(SYSCTL_HANDLER_ARGS) 173 { 174 struct bcmsc_softc *sc = arg1; 175 struct bcm2835_fb_config fb; 176 int val; 177 int err; 178 179 val = 0; 180 err = sysctl_handle_int(oidp, &val, 0, req); 181 if (err || !req->newptr) /* error || read request */ 182 return (err); 183 184 bcm_fb_init(sc, &fb); 185 186 return (0); 187 } 188 189 static void 190 bcm_fb_sysctl_init(struct bcmsc_softc *sc) 191 { 192 struct sysctl_ctx_list *ctx; 193 struct sysctl_oid *tree_node; 194 struct sysctl_oid_list *tree; 195 196 /* 197 * Add system sysctl tree/handlers. 198 */ 199 ctx = device_get_sysctl_ctx(sc->dev); 200 tree_node = device_get_sysctl_tree(sc->dev); 201 tree = SYSCTL_CHILDREN(tree_node); 202 SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "resync", 203 CTLFLAG_RW | CTLTYPE_UINT | CTLFLAG_NEEDGIANT, sc, sizeof(*sc), 204 bcm_fb_resync_sysctl, "IU", "Set to resync framebuffer with VC"); 205 } 206 207 static int 208 bcm_fb_probe(device_t dev) 209 { 210 211 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 212 return (ENXIO); 213 214 device_set_desc(dev, "BCM2835 VT framebuffer driver"); 215 216 return (BUS_PROBE_DEFAULT); 217 } 218 219 static int 220 bcm_fb_attach(device_t dev) 221 { 222 char bootargs[2048], *n, *p, *v; 223 int err; 224 phandle_t chosen; 225 struct bcmsc_softc *sc; 226 227 sc = device_get_softc(dev); 228 sc->dev = dev; 229 230 /* Newer firmware versions needs an inverted color palette. */ 231 sc->fbswap = 0; 232 chosen = OF_finddevice("/chosen"); 233 if (chosen != -1 && 234 OF_getprop(chosen, "bootargs", &bootargs, sizeof(bootargs)) > 0) { 235 p = bootargs; 236 while ((v = strsep(&p, " ")) != NULL) { 237 if (*v == '\0') 238 continue; 239 n = strsep(&v, "="); 240 if (strcmp(n, "bcm2708_fb.fbswap") == 0 && v != NULL) 241 if (*v == '1') 242 sc->fbswap = 1; 243 } 244 } 245 246 bcm_fb_sysctl_init(sc); 247 248 err = bcm_fb_setup_fbd(sc); 249 if (err) 250 return (err); 251 252 return (0); 253 } 254 255 static struct fb_info * 256 bcm_fb_helper_getinfo(device_t dev) 257 { 258 struct bcmsc_softc *sc; 259 260 sc = device_get_softc(dev); 261 262 return (&sc->info); 263 } 264 265 static device_method_t bcm_fb_methods[] = { 266 /* Device interface */ 267 DEVMETHOD(device_probe, bcm_fb_probe), 268 DEVMETHOD(device_attach, bcm_fb_attach), 269 270 /* Framebuffer service methods */ 271 DEVMETHOD(fb_getinfo, bcm_fb_helper_getinfo), 272 273 DEVMETHOD_END 274 }; 275 276 static driver_t bcm_fb_driver = { 277 "fb", 278 bcm_fb_methods, 279 sizeof(struct bcmsc_softc), 280 }; 281 282 DRIVER_MODULE(bcm2835fb, ofwbus, bcm_fb_driver, 0, 0); 283 DRIVER_MODULE(bcm2835fb, simplebus, bcm_fb_driver, 0, 0); 284