1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2013 The FreeBSD Foundation 5 * 6 * This software was developed by Aleksandr Rybalko under sponsorship from the 7 * 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 /* Generic framebuffer */ 32 /* TODO unlink from VT(9) */ 33 /* TODO done normal /dev/fb methods */ 34 35 #include <sys/cdefs.h> 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/bus.h> 39 #include <sys/conf.h> 40 #include <sys/eventhandler.h> 41 #include <sys/kernel.h> 42 #include <sys/malloc.h> 43 #include <sys/module.h> 44 #include <sys/queue.h> 45 #include <sys/fbio.h> 46 47 #include <machine/bus.h> 48 49 #include <dev/vt/vt.h> 50 #include <dev/vt/hw/fb/vt_fb.h> 51 52 #include <vm/vm.h> 53 #include <vm/pmap.h> 54 55 #include "fb_if.h" 56 57 LIST_HEAD(fb_list_head_t, fb_list_entry) fb_list_head = 58 LIST_HEAD_INITIALIZER(fb_list_head); 59 struct fb_list_entry { 60 struct fb_info *fb_info; 61 struct cdev *fb_si; 62 LIST_ENTRY(fb_list_entry) fb_list; 63 }; 64 65 struct fbd_softc { 66 device_t sc_dev; 67 struct fb_info *sc_info; 68 }; 69 70 static void fbd_evh_init(void *); 71 /* SI_ORDER_SECOND, just after EVENTHANDLERs initialized. */ 72 SYSINIT(fbd_evh_init, SI_SUB_CONFIGURE, SI_ORDER_SECOND, fbd_evh_init, NULL); 73 74 static d_open_t fb_open; 75 static d_close_t fb_close; 76 static d_read_t fb_read; 77 static d_write_t fb_write; 78 static d_ioctl_t fb_ioctl; 79 static d_mmap_t fb_mmap; 80 81 static struct cdevsw fb_cdevsw = { 82 .d_version = D_VERSION, 83 .d_flags = D_NEEDGIANT, 84 .d_open = fb_open, 85 .d_close = fb_close, 86 .d_read = fb_read, 87 .d_write = fb_write, 88 .d_ioctl = fb_ioctl, 89 .d_mmap = fb_mmap, 90 .d_name = "fb", 91 }; 92 93 static int framebuffer_dev_unit = 0; 94 95 static int 96 fb_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 97 { 98 99 return (0); 100 } 101 102 static int 103 fb_close(struct cdev *dev, int fflag, int devtype, struct thread *td) 104 { 105 106 return (0); 107 } 108 109 static int 110 fb_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, 111 struct thread *td) 112 { 113 struct fb_info *info; 114 int error; 115 116 error = 0; 117 info = dev->si_drv1; 118 119 switch (cmd) { 120 case FBIOGTYPE: 121 bcopy(info, (struct fbtype *)data, sizeof(struct fbtype)); 122 break; 123 124 case FBIO_GETWINORG: /* get frame buffer window origin */ 125 *(u_int *)data = 0; 126 break; 127 128 case FBIO_GETDISPSTART: /* get display start address */ 129 ((video_display_start_t *)data)->x = 0; 130 ((video_display_start_t *)data)->y = 0; 131 break; 132 133 case FBIO_GETLINEWIDTH: /* get scan line width in bytes */ 134 *(u_int *)data = info->fb_stride; 135 break; 136 137 case FBIO_BLANK: /* blank display */ 138 if (info->setblankmode != NULL) 139 error = info->setblankmode(info->fb_priv, *(int *)data); 140 break; 141 142 default: 143 error = ENOIOCTL; 144 break; 145 } 146 return (error); 147 } 148 149 static int 150 fb_read(struct cdev *dev, struct uio *uio, int ioflag) 151 { 152 153 return (0); /* XXX nothing to read, yet */ 154 } 155 156 static int 157 fb_write(struct cdev *dev, struct uio *uio, int ioflag) 158 { 159 160 return (0); /* XXX nothing written */ 161 } 162 163 static int 164 fb_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr, int nprot, 165 vm_memattr_t *memattr) 166 { 167 struct fb_info *info; 168 169 info = dev->si_drv1; 170 171 if (info->fb_flags & FB_FLAG_NOMMAP) 172 return (ENODEV); 173 174 if (offset < info->fb_size) { 175 if (info->fb_pbase == 0) 176 *paddr = vtophys((uint8_t *)info->fb_vbase + offset); 177 else 178 *paddr = info->fb_pbase + offset; 179 if (info->fb_flags & FB_FLAG_MEMATTR) 180 *memattr = info->fb_memattr; 181 return (0); 182 } 183 return (EINVAL); 184 } 185 186 static int 187 fb_init(struct fb_list_entry *entry, int unit) 188 { 189 struct fb_info *info; 190 191 info = entry->fb_info; 192 entry->fb_si = make_dev(&fb_cdevsw, unit, UID_ROOT, GID_WHEEL, 193 0600, "fb%d", unit); 194 entry->fb_si->si_drv1 = info; 195 info->fb_cdev = entry->fb_si; 196 197 return (0); 198 } 199 200 int 201 fbd_list(void) 202 { 203 struct fb_list_entry *entry; 204 205 if (LIST_EMPTY(&fb_list_head)) 206 return (ENOENT); 207 208 LIST_FOREACH(entry, &fb_list_head, fb_list) { 209 printf("FB %s @%#jx\n", entry->fb_info->fb_name, 210 (uintmax_t)entry->fb_info->fb_pbase); 211 } 212 213 return (0); 214 } 215 216 static struct fb_list_entry * 217 fbd_find(struct fb_info* info) 218 { 219 struct fb_list_entry *entry, *tmp; 220 221 LIST_FOREACH_SAFE(entry, &fb_list_head, fb_list, tmp) { 222 if (entry->fb_info == info) { 223 return (entry); 224 } 225 } 226 227 return (NULL); 228 } 229 230 int 231 fbd_register(struct fb_info* info) 232 { 233 struct fb_list_entry *entry; 234 int err, first; 235 236 first = 0; 237 if (LIST_EMPTY(&fb_list_head)) 238 first++; 239 240 entry = fbd_find(info); 241 if (entry != NULL) { 242 /* XXX Update framebuffer params */ 243 return (0); 244 } 245 246 entry = malloc(sizeof(struct fb_list_entry), M_DEVBUF, M_WAITOK|M_ZERO); 247 entry->fb_info = info; 248 249 LIST_INSERT_HEAD(&fb_list_head, entry, fb_list); 250 251 err = fb_init(entry, framebuffer_dev_unit++); 252 if (err) 253 return (err); 254 255 if (first) { 256 err = vt_fb_attach(info); 257 if (err) 258 return (err); 259 } 260 261 return (0); 262 } 263 264 int 265 fbd_unregister(struct fb_info* info) 266 { 267 struct fb_list_entry *entry, *tmp; 268 269 LIST_FOREACH_SAFE(entry, &fb_list_head, fb_list, tmp) { 270 if (entry->fb_info == info) { 271 LIST_REMOVE(entry, fb_list); 272 if (LIST_EMPTY(&fb_list_head)) 273 vt_fb_detach(info); 274 free(entry, M_DEVBUF); 275 return (0); 276 } 277 } 278 279 return (ENOENT); 280 } 281 282 static void 283 register_fb_wrap(void *arg, void *ptr) 284 { 285 286 fbd_register((struct fb_info *)ptr); 287 } 288 289 static void 290 unregister_fb_wrap(void *arg, void *ptr) 291 { 292 293 fbd_unregister((struct fb_info *)ptr); 294 } 295 296 static void 297 fbd_evh_init(void *ctx) 298 { 299 300 EVENTHANDLER_REGISTER(register_framebuffer, register_fb_wrap, NULL, 301 EVENTHANDLER_PRI_ANY); 302 EVENTHANDLER_REGISTER(unregister_framebuffer, unregister_fb_wrap, NULL, 303 EVENTHANDLER_PRI_ANY); 304 } 305 306 /* Newbus methods. */ 307 static int 308 fbd_probe(device_t dev) 309 { 310 311 return (BUS_PROBE_NOWILDCARD); 312 } 313 314 static int 315 fbd_attach(device_t dev) 316 { 317 struct fbd_softc *sc; 318 int err; 319 320 sc = device_get_softc(dev); 321 322 sc->sc_dev = dev; 323 sc->sc_info = FB_GETINFO(device_get_parent(dev)); 324 if (sc->sc_info == NULL) 325 return (ENXIO); 326 err = fbd_register(sc->sc_info); 327 328 return (err); 329 } 330 331 static int 332 fbd_detach(device_t dev) 333 { 334 struct fbd_softc *sc; 335 int err; 336 337 sc = device_get_softc(dev); 338 339 err = fbd_unregister(sc->sc_info); 340 341 return (err); 342 } 343 344 static device_method_t fbd_methods[] = { 345 /* Device interface */ 346 DEVMETHOD(device_probe, fbd_probe), 347 DEVMETHOD(device_attach, fbd_attach), 348 DEVMETHOD(device_detach, fbd_detach), 349 350 DEVMETHOD(device_shutdown, bus_generic_shutdown), 351 352 { 0, 0 } 353 }; 354 355 driver_t fbd_driver = { 356 "fbd", 357 fbd_methods, 358 sizeof(struct fbd_softc) 359 }; 360 361 DRIVER_MODULE(fbd, fb, fbd_driver, 0, 0); 362 DRIVER_MODULE(fbd, drmn, fbd_driver, 0, 0); 363 DRIVER_MODULE(fbd, udl, fbd_driver, 0, 0); 364 MODULE_VERSION(fbd, 1); 365 366