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