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", fb->bpp, FB_DEPTH); 92 fb->bpp = FB_DEPTH; 93 } else 94 device_printf(sc->dev, "keeping existing fb bpp of %d\n", 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", err); 102 return (ENXIO); 103 } 104 105 return (0); 106 } 107 108 static int 109 bcm_fb_setup_fbd(struct bcmsc_softc *sc) 110 { 111 struct bcm2835_fb_config fb; 112 device_t fbd; 113 int err; 114 115 err = bcm_fb_init(sc, &fb); 116 if (err) 117 return (err); 118 119 memset(&sc->info, 0, sizeof(sc->info)); 120 sc->info.fb_name = device_get_nameunit(sc->dev); 121 122 sc->info.fb_vbase = (intptr_t)pmap_mapdev(fb.base, fb.size); 123 sc->info.fb_pbase = fb.base; 124 sc->info.fb_size = fb.size; 125 sc->info.fb_bpp = sc->info.fb_depth = fb.bpp; 126 sc->info.fb_stride = fb.pitch; 127 sc->info.fb_width = fb.xres; 128 sc->info.fb_height = fb.yres; 129 #ifdef VM_MEMATTR_WRITE_COMBINING 130 sc->info.fb_flags = FB_FLAG_MEMATTR; 131 sc->info.fb_memattr = VM_MEMATTR_WRITE_COMBINING; 132 #endif 133 134 if (sc->fbswap) { 135 switch (sc->info.fb_bpp) { 136 case 24: 137 vt_generate_cons_palette(sc->info.fb_cmap, 138 COLOR_FORMAT_RGB, 0xff, 0, 0xff, 8, 0xff, 16); 139 sc->info.fb_cmsize = 16; 140 break; 141 case 32: 142 vt_generate_cons_palette(sc->info.fb_cmap, 143 COLOR_FORMAT_RGB, 0xff, 16, 0xff, 8, 0xff, 0); 144 sc->info.fb_cmsize = 16; 145 break; 146 } 147 } 148 149 fbd = device_add_child(sc->dev, "fbd", device_get_unit(sc->dev)); 150 if (fbd == NULL) { 151 device_printf(sc->dev, "Failed to add fbd child\n"); 152 pmap_unmapdev(sc->info.fb_vbase, sc->info.fb_size); 153 return (ENXIO); 154 } else if (device_probe_and_attach(fbd) != 0) { 155 device_printf(sc->dev, "Failed to attach fbd device\n"); 156 device_delete_child(sc->dev, fbd); 157 pmap_unmapdev(sc->info.fb_vbase, sc->info.fb_size); 158 return (ENXIO); 159 } 160 161 device_printf(sc->dev, "%dx%d(%dx%d@%d,%d) %dbpp\n", fb.xres, fb.yres, 162 fb.vxres, fb.vyres, fb.xoffset, fb.yoffset, fb.bpp); 163 device_printf(sc->dev, 164 "fbswap: %d, pitch %d, base 0x%08x, screen_size %d\n", 165 sc->fbswap, fb.pitch, fb.base, fb.size); 166 167 return (0); 168 } 169 170 static int 171 bcm_fb_resync_sysctl(SYSCTL_HANDLER_ARGS) 172 { 173 struct bcmsc_softc *sc = arg1; 174 struct bcm2835_fb_config fb; 175 int val; 176 int err; 177 178 val = 0; 179 err = sysctl_handle_int(oidp, &val, 0, req); 180 if (err || !req->newptr) /* error || read request */ 181 return (err); 182 183 bcm_fb_init(sc, &fb); 184 185 return (0); 186 } 187 188 static void 189 bcm_fb_sysctl_init(struct bcmsc_softc *sc) 190 { 191 struct sysctl_ctx_list *ctx; 192 struct sysctl_oid *tree_node; 193 struct sysctl_oid_list *tree; 194 195 /* 196 * Add system sysctl tree/handlers. 197 */ 198 ctx = device_get_sysctl_ctx(sc->dev); 199 tree_node = device_get_sysctl_tree(sc->dev); 200 tree = SYSCTL_CHILDREN(tree_node); 201 SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "resync", 202 CTLFLAG_RW | CTLTYPE_UINT | CTLFLAG_NEEDGIANT, sc, sizeof(*sc), 203 bcm_fb_resync_sysctl, "IU", "Set to resync framebuffer with VC"); 204 } 205 206 static int 207 bcm_fb_probe(device_t dev) 208 { 209 210 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 211 return (ENXIO); 212 213 device_set_desc(dev, "BCM2835 VT framebuffer driver"); 214 215 return (BUS_PROBE_DEFAULT); 216 } 217 218 static int 219 bcm_fb_attach(device_t dev) 220 { 221 char bootargs[2048], *n, *p, *v; 222 int err; 223 phandle_t chosen; 224 struct bcmsc_softc *sc; 225 226 sc = device_get_softc(dev); 227 sc->dev = dev; 228 229 /* Newer firmware versions needs an inverted color palette. */ 230 sc->fbswap = 0; 231 chosen = OF_finddevice("/chosen"); 232 if (chosen != -1 && 233 OF_getprop(chosen, "bootargs", &bootargs, sizeof(bootargs)) > 0) { 234 p = bootargs; 235 while ((v = strsep(&p, " ")) != NULL) { 236 if (*v == '\0') 237 continue; 238 n = strsep(&v, "="); 239 if (strcmp(n, "bcm2708_fb.fbswap") == 0 && v != NULL) 240 if (*v == '1') 241 sc->fbswap = 1; 242 } 243 } 244 245 bcm_fb_sysctl_init(sc); 246 247 err = bcm_fb_setup_fbd(sc); 248 if (err) 249 return (err); 250 251 return (0); 252 } 253 254 static struct fb_info * 255 bcm_fb_helper_getinfo(device_t dev) 256 { 257 struct bcmsc_softc *sc; 258 259 sc = device_get_softc(dev); 260 261 return (&sc->info); 262 } 263 264 static device_method_t bcm_fb_methods[] = { 265 /* Device interface */ 266 DEVMETHOD(device_probe, bcm_fb_probe), 267 DEVMETHOD(device_attach, bcm_fb_attach), 268 269 /* Framebuffer service methods */ 270 DEVMETHOD(fb_getinfo, bcm_fb_helper_getinfo), 271 272 DEVMETHOD_END 273 }; 274 275 static devclass_t bcm_fb_devclass; 276 277 static driver_t bcm_fb_driver = { 278 "fb", 279 bcm_fb_methods, 280 sizeof(struct bcmsc_softc), 281 }; 282 283 DRIVER_MODULE(bcm2835fb, ofwbus, bcm_fb_driver, bcm_fb_devclass, 0, 0); 284 DRIVER_MODULE(bcm2835fb, simplebus, bcm_fb_driver, bcm_fb_devclass, 0, 0); 285