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: stable/11/sys/arm/broadcom/bcm2835/bcm2835_fbd.c 307596 2016-10-19 02:15:41Z gonzo $"); 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/fdt/fdt_common.h> 47#include <dev/ofw/ofw_bus.h> 48#include <dev/ofw/ofw_bus_subr.h> 49 50#include <dev/fb/fbreg.h> 51#include <dev/vt/vt.h> 52#include <dev/vt/colors/vt_termcolors.h> 53 54#include <arm/broadcom/bcm2835/bcm2835_mbox_prop.h> 55 56#include "fb_if.h" 57#include "mbox_if.h" 58 59#define FB_DEPTH 24 60 61struct bcmsc_softc { 62 struct fb_info info; 63 int fbswap; 64 struct bcm2835_fb_config fb; 65 device_t dev; 66}; 67 68static struct ofw_compat_data compat_data[] = { 69 {"broadcom,bcm2835-fb", 1}, 70 {"brcm,bcm2708-fb", 1}, 71 {NULL, 0} 72}; 73 74static int bcm_fb_probe(device_t); 75static int bcm_fb_attach(device_t); 76 77static int 78bcm_fb_init(struct bcmsc_softc *sc, struct bcm2835_fb_config *fb) 79{ 80 int err; 81 82 err = 0; 83 84 memset(fb, 0, sizeof(*fb)); 85 if (bcm2835_mbox_fb_get_w_h(fb) != 0) 86 return (ENXIO); 87 fb->bpp = FB_DEPTH; 88 89 fb->vxres = fb->xres; 90 fb->vyres = fb->yres; 91 fb->xoffset = fb->yoffset = 0; 92 93 if ((err = bcm2835_mbox_fb_init(fb)) != 0) { 94 device_printf(sc->dev, "bcm2835_mbox_fb_init failed, err=%d\n", err); 95 return (ENXIO); 96 } 97 98 return (0); 99} 100 101static int 102bcm_fb_setup_fbd(struct bcmsc_softc *sc) 103{ 104 struct bcm2835_fb_config fb; 105 device_t fbd; 106 int err; 107 108 err = bcm_fb_init(sc, &fb); 109 if (err) 110 return (err); 111 112 memset(&sc->info, 0, sizeof(sc->info)); 113 sc->info.fb_name = device_get_nameunit(sc->dev); 114 115 sc->info.fb_vbase = (intptr_t)pmap_mapdev(fb.base, fb.size); 116 sc->info.fb_pbase = fb.base; 117 sc->info.fb_size = fb.size; 118 sc->info.fb_bpp = sc->info.fb_depth = fb.bpp; 119 sc->info.fb_stride = fb.pitch; 120 sc->info.fb_width = fb.xres; 121 sc->info.fb_height = fb.yres; 122#ifdef VM_MEMATTR_WRITE_COMBINING 123 sc->info.fb_flags = FB_FLAG_MEMATTR; 124 sc->info.fb_memattr = VM_MEMATTR_WRITE_COMBINING; 125#endif 126 127 if (sc->fbswap) { 128 switch (sc->info.fb_bpp) { 129 case 24: 130 vt_generate_cons_palette(sc->info.fb_cmap, 131 COLOR_FORMAT_RGB, 0xff, 0, 0xff, 8, 0xff, 16); 132 sc->info.fb_cmsize = 16; 133 break; 134 case 32: 135 vt_generate_cons_palette(sc->info.fb_cmap, 136 COLOR_FORMAT_RGB, 0xff, 16, 0xff, 8, 0xff, 0); 137 sc->info.fb_cmsize = 16; 138 break; 139 } 140 } 141 142 fbd = device_add_child(sc->dev, "fbd", device_get_unit(sc->dev)); 143 if (fbd == NULL) { 144 device_printf(sc->dev, "Failed to add fbd child\n"); 145 pmap_unmapdev(sc->info.fb_vbase, sc->info.fb_size); 146 return (ENXIO); 147 } else if (device_probe_and_attach(fbd) != 0) { 148 device_printf(sc->dev, "Failed to attach fbd device\n"); 149 device_delete_child(sc->dev, fbd); 150 pmap_unmapdev(sc->info.fb_vbase, sc->info.fb_size); 151 return (ENXIO); 152 } 153 154 device_printf(sc->dev, "%dx%d(%dx%d@%d,%d) %dbpp\n", fb.xres, fb.yres, 155 fb.vxres, fb.vyres, fb.xoffset, fb.yoffset, fb.bpp); 156 device_printf(sc->dev, 157 "fbswap: %d, pitch %d, base 0x%08x, screen_size %d\n", 158 sc->fbswap, fb.pitch, fb.base, fb.size); 159 160 return (0); 161} 162 163static int 164bcm_fb_resync_sysctl(SYSCTL_HANDLER_ARGS) 165{ 166 struct bcmsc_softc *sc = arg1; 167 struct bcm2835_fb_config fb; 168 int val; 169 int err; 170 171 val = 0; 172 err = sysctl_handle_int(oidp, &val, 0, req); 173 if (err || !req->newptr) /* error || read request */ 174 return (err); 175 176 bcm_fb_init(sc, &fb); 177 178 return (0); 179} 180 181static void 182bcm_fb_sysctl_init(struct bcmsc_softc *sc) 183{ 184 struct sysctl_ctx_list *ctx; 185 struct sysctl_oid *tree_node; 186 struct sysctl_oid_list *tree; 187 188 /* 189 * Add system sysctl tree/handlers. 190 */ 191 ctx = device_get_sysctl_ctx(sc->dev); 192 tree_node = device_get_sysctl_tree(sc->dev); 193 tree = SYSCTL_CHILDREN(tree_node); 194 SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "resync", 195 CTLFLAG_RW | CTLTYPE_UINT, sc, sizeof(*sc), 196 bcm_fb_resync_sysctl, "IU", "Set to resync framebuffer with VC"); 197} 198 199static int 200bcm_fb_probe(device_t dev) 201{ 202 203 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 204 return (ENXIO); 205 206 device_set_desc(dev, "BCM2835 VT framebuffer driver"); 207 208 return (BUS_PROBE_DEFAULT); 209} 210 211static int 212bcm_fb_attach(device_t dev) 213{ 214 char bootargs[2048], *n, *p, *v; 215 int err; 216 phandle_t chosen; 217 struct bcmsc_softc *sc; 218 219 sc = device_get_softc(dev); 220 sc->dev = dev; 221 222 /* Newer firmware versions needs an inverted color palette. */ 223 sc->fbswap = 0; 224 chosen = OF_finddevice("/chosen"); 225 if (chosen != 0 && 226 OF_getprop(chosen, "bootargs", &bootargs, sizeof(bootargs)) > 0) { 227 p = bootargs; 228 while ((v = strsep(&p, " ")) != NULL) { 229 if (*v == '\0') 230 continue; 231 n = strsep(&v, "="); 232 if (strcmp(n, "bcm2708_fb.fbswap") == 0 && v != NULL) 233 if (*v == '1') 234 sc->fbswap = 1; 235 } 236 } 237 238 bcm_fb_sysctl_init(sc); 239 240 err = bcm_fb_setup_fbd(sc); 241 if (err) 242 return (err); 243 244 return (0); 245} 246 247static struct fb_info * 248bcm_fb_helper_getinfo(device_t dev) 249{ 250 struct bcmsc_softc *sc; 251 252 sc = device_get_softc(dev); 253 254 return (&sc->info); 255} 256 257static device_method_t bcm_fb_methods[] = { 258 /* Device interface */ 259 DEVMETHOD(device_probe, bcm_fb_probe), 260 DEVMETHOD(device_attach, bcm_fb_attach), 261 262 /* Framebuffer service methods */ 263 DEVMETHOD(fb_getinfo, bcm_fb_helper_getinfo), 264 265 DEVMETHOD_END 266}; 267 268static devclass_t bcm_fb_devclass; 269 270static driver_t bcm_fb_driver = { 271 "fb", 272 bcm_fb_methods, 273 sizeof(struct bcmsc_softc), 274}; 275 276DRIVER_MODULE(bcm2835fb, ofwbus, bcm_fb_driver, bcm_fb_devclass, 0, 0); 277DRIVER_MODULE(bcm2835fb, simplebus, bcm_fb_driver, bcm_fb_devclass, 0, 0); 278