1 /*- 2 * Copyright (c) 2013 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Aleksandr Rybalko under sponsorship from the 6 * FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 /* Generic framebuffer */ 33 /* TODO unlink from VT(9) */ 34 /* TODO done normal /dev/fb methods */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/bus.h> 42 #include <sys/conf.h> 43 #include <sys/kernel.h> 44 #include <sys/malloc.h> 45 #include <sys/module.h> 46 #include <sys/queue.h> 47 #include <sys/fbio.h> 48 49 #include <machine/bus.h> 50 51 #include <dev/vt/vt.h> 52 #include <dev/vt/hw/fb/vt_fb.h> 53 54 #include "fb_if.h" 55 56 LIST_HEAD(fb_list_head_t, fb_list_entry) fb_list_head = 57 LIST_HEAD_INITIALIZER(fb_list_head); 58 struct fb_list_entry { 59 struct fb_info *fb_info; 60 struct cdev *fb_si; 61 LIST_ENTRY(fb_list_entry) fb_list; 62 }; 63 64 struct fbd_softc { 65 device_t sc_dev; 66 struct fb_info *sc_info; 67 }; 68 69 static void fbd_evh_init(void *); 70 /* SI_ORDER_SECOND, just after EVENTHANDLERs initialized. */ 71 SYSINIT(fbd_evh_init, SI_SUB_CONFIGURE, SI_ORDER_SECOND, fbd_evh_init, NULL); 72 73 static d_open_t fb_open; 74 static d_close_t fb_close; 75 static d_read_t fb_read; 76 static d_write_t fb_write; 77 static d_ioctl_t fb_ioctl; 78 static d_mmap_t fb_mmap; 79 80 static struct cdevsw fb_cdevsw = { 81 .d_version = D_VERSION, 82 .d_flags = D_NEEDGIANT, 83 .d_open = fb_open, 84 .d_close = fb_close, 85 .d_read = fb_read, 86 .d_write = fb_write, 87 .d_ioctl = fb_ioctl, 88 .d_mmap = fb_mmap, 89 .d_name = "fb", 90 }; 91 92 static int framebuffer_dev_unit = 0; 93 94 static int 95 fb_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 96 { 97 98 return (0); 99 } 100 101 static int 102 fb_close(struct cdev *dev, int fflag, int devtype, struct thread *td) 103 { 104 105 return (0); 106 } 107 108 static int 109 fb_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, 110 struct thread *td) 111 { 112 struct fb_info *info; 113 int error; 114 115 error = 0; 116 info = dev->si_drv1; 117 118 switch (cmd) { 119 case FBIOGTYPE: 120 bcopy(info, (struct fbtype *)data, sizeof(struct fbtype)); 121 break; 122 123 case FBIO_GETWINORG: /* get frame buffer window origin */ 124 *(u_int *)data = 0; 125 break; 126 127 case FBIO_GETDISPSTART: /* get display start address */ 128 ((video_display_start_t *)data)->x = 0; 129 ((video_display_start_t *)data)->y = 0; 130 break; 131 132 case FBIO_GETLINEWIDTH: /* get scan line width in bytes */ 133 *(u_int *)data = info->fb_stride; 134 break; 135 136 case FBIO_BLANK: /* blank display */ 137 error = 0; /* TODO */ 138 break; 139 140 default: 141 error = ENOIOCTL; 142 break; 143 } 144 return (error); 145 } 146 147 static int 148 fb_read(struct cdev *dev, struct uio *uio, int ioflag) 149 { 150 151 return (0); /* XXX nothing to read, yet */ 152 } 153 154 static int 155 fb_write(struct cdev *dev, struct uio *uio, int ioflag) 156 { 157 158 return (0); /* XXX nothing written */ 159 } 160 161 static int 162 fb_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr, int nprot, 163 vm_memattr_t *memattr) 164 { 165 struct fb_info *info; 166 167 info = dev->si_drv1; 168 169 if ((info->fb_flags & FB_FLAG_NOMMAP) || info->fb_pbase == 0) 170 return (ENODEV); 171 172 if (offset < info->fb_size) { 173 *paddr = info->fb_pbase + offset; 174 return (0); 175 } 176 return (EINVAL); 177 } 178 179 static int 180 fb_init(struct fb_list_entry *entry, int unit) 181 { 182 struct fb_info *info; 183 184 info = entry->fb_info; 185 entry->fb_si = make_dev(&fb_cdevsw, unit, UID_ROOT, GID_WHEEL, 186 0600, "fb%d", unit); 187 entry->fb_si->si_drv1 = info; 188 info->fb_cdev = entry->fb_si; 189 190 return (0); 191 } 192 193 int 194 fbd_list() 195 { 196 struct fb_list_entry *entry; 197 198 if (LIST_EMPTY(&fb_list_head)) 199 return (ENOENT); 200 201 LIST_FOREACH(entry, &fb_list_head, fb_list) { 202 printf("FB %s @%p\n", entry->fb_info->fb_name, 203 (void *)entry->fb_info->fb_pbase); 204 } 205 206 return (0); 207 } 208 209 static struct fb_list_entry * 210 fbd_find(struct fb_info* info) 211 { 212 struct fb_list_entry *entry, *tmp; 213 214 LIST_FOREACH_SAFE(entry, &fb_list_head, fb_list, tmp) { 215 if (entry->fb_info == info) { 216 return (entry); 217 } 218 } 219 220 return (NULL); 221 } 222 223 int 224 fbd_register(struct fb_info* info) 225 { 226 struct fb_list_entry *entry; 227 int err, first; 228 229 first = 0; 230 if (LIST_EMPTY(&fb_list_head)) 231 first++; 232 233 entry = fbd_find(info); 234 if (entry != NULL) { 235 /* XXX Update framebuffer params */ 236 return (0); 237 } 238 239 entry = malloc(sizeof(struct fb_list_entry), M_DEVBUF, M_WAITOK|M_ZERO); 240 entry->fb_info = info; 241 242 LIST_INSERT_HEAD(&fb_list_head, entry, fb_list); 243 244 err = fb_init(entry, framebuffer_dev_unit++); 245 if (err) 246 return (err); 247 248 if (first) { 249 err = vt_fb_attach(info); 250 if (err) 251 return (err); 252 } 253 254 return (0); 255 } 256 257 int 258 fbd_unregister(struct fb_info* info) 259 { 260 struct fb_list_entry *entry, *tmp; 261 262 LIST_FOREACH_SAFE(entry, &fb_list_head, fb_list, tmp) { 263 if (entry->fb_info == info) { 264 LIST_REMOVE(entry, fb_list); 265 free(entry, M_DEVBUF); 266 return (0); 267 } 268 } 269 270 return (ENOENT); 271 } 272 273 static void 274 register_fb_wrap(void *arg, void *ptr) 275 { 276 277 fbd_register((struct fb_info *)ptr); 278 } 279 280 static void 281 unregister_fb_wrap(void *arg, void *ptr) 282 { 283 284 fbd_unregister((struct fb_info *)ptr); 285 } 286 287 static void 288 fbd_evh_init(void *ctx) 289 { 290 291 EVENTHANDLER_REGISTER(register_framebuffer, register_fb_wrap, NULL, 292 EVENTHANDLER_PRI_ANY); 293 EVENTHANDLER_REGISTER(unregister_framebuffer, unregister_fb_wrap, NULL, 294 EVENTHANDLER_PRI_ANY); 295 } 296 297 /* Newbus methods. */ 298 static int 299 fbd_probe(device_t dev) 300 { 301 302 return (BUS_PROBE_NOWILDCARD); 303 } 304 305 static int 306 fbd_attach(device_t dev) 307 { 308 struct fbd_softc *sc; 309 int err; 310 311 sc = device_get_softc(dev); 312 313 sc->sc_dev = dev; 314 sc->sc_info = FB_GETINFO(device_get_parent(dev)); 315 if (sc->sc_info == NULL) 316 return (ENXIO); 317 err = fbd_register(sc->sc_info); 318 319 return (err); 320 } 321 322 static int 323 fbd_detach(device_t dev) 324 { 325 struct fbd_softc *sc; 326 int err; 327 328 sc = device_get_softc(dev); 329 330 err = fbd_unregister(sc->sc_info); 331 332 return (err); 333 } 334 335 static int 336 fbd_suspend(device_t dev) 337 { 338 339 vt_fb_suspend(); 340 return (bus_generic_suspend(dev)); 341 } 342 343 static int 344 fbd_resume(device_t dev) 345 { 346 347 vt_fb_resume(); 348 return (bus_generic_resume(dev)); 349 } 350 351 static device_method_t fbd_methods[] = { 352 /* Device interface */ 353 DEVMETHOD(device_probe, fbd_probe), 354 DEVMETHOD(device_attach, fbd_attach), 355 DEVMETHOD(device_detach, fbd_detach), 356 357 DEVMETHOD(device_shutdown, bus_generic_shutdown), 358 DEVMETHOD(device_suspend, fbd_suspend), 359 DEVMETHOD(device_resume, fbd_resume), 360 361 { 0, 0 } 362 }; 363 364 driver_t fbd_driver = { 365 "fbd", 366 fbd_methods, 367 sizeof(struct fbd_softc) 368 }; 369 370 devclass_t fbd_devclass; 371 372 DRIVER_MODULE(fbd, fb, fbd_driver, fbd_devclass, 0, 0); 373 DRIVER_MODULE(fbd, drmn, fbd_driver, fbd_devclass, 0, 0); 374 MODULE_VERSION(fbd, 1); 375 376