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("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/bio.h> 37 #include <sys/bus.h> 38 #include <sys/conf.h> 39 #include <sys/endian.h> 40 #include <sys/kernel.h> 41 #include <sys/kthread.h> 42 #include <sys/lock.h> 43 #include <sys/malloc.h> 44 #include <sys/module.h> 45 #include <sys/mutex.h> 46 #include <sys/queue.h> 47 #include <sys/resource.h> 48 #include <sys/rman.h> 49 #include <sys/time.h> 50 #include <sys/timetc.h> 51 #include <sys/fbio.h> 52 #include <sys/consio.h> 53 54 #include <sys/kdb.h> 55 56 #include <machine/bus.h> 57 #include <machine/cpu.h> 58 #include <machine/cpufunc.h> 59 #include <machine/fdt.h> 60 #include <machine/resource.h> 61 #include <machine/intr.h> 62 63 #include <dev/fdt/fdt_common.h> 64 #include <dev/ofw/ofw_bus.h> 65 #include <dev/ofw/ofw_bus_subr.h> 66 67 #include <dev/fb/fbreg.h> 68 #include <dev/vt/vt.h> 69 70 #include <arm/broadcom/bcm2835/bcm2835_mbox.h> 71 #include <arm/broadcom/bcm2835/bcm2835_vcbus.h> 72 73 #include "fb_if.h" 74 #include "mbox_if.h" 75 76 #define FB_WIDTH 640 77 #define FB_HEIGHT 480 78 #define FB_DEPTH 24 79 80 struct bcm_fb_config { 81 uint32_t xres; 82 uint32_t yres; 83 uint32_t vxres; 84 uint32_t vyres; 85 uint32_t pitch; 86 uint32_t bpp; 87 uint32_t xoffset; 88 uint32_t yoffset; 89 /* Filled by videocore */ 90 uint32_t base; 91 uint32_t screen_size; 92 }; 93 94 struct bcmsc_softc { 95 device_t dev; 96 struct fb_info *info; 97 bus_dma_tag_t dma_tag; 98 bus_dmamap_t dma_map; 99 struct bcm_fb_config* fb_config; 100 bus_addr_t fb_config_phys; 101 struct intr_config_hook init_hook; 102 }; 103 104 static int bcm_fb_probe(device_t); 105 static int bcm_fb_attach(device_t); 106 static void bcm_fb_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, 107 int err); 108 109 static void 110 bcm_fb_init(void *arg) 111 { 112 volatile struct bcm_fb_config *fb_config; 113 struct bcmsc_softc *sc; 114 struct fb_info *info; 115 phandle_t node; 116 pcell_t cell; 117 device_t mbox; 118 device_t fbd; 119 int err = 0; 120 121 sc = arg; 122 fb_config = sc->fb_config; 123 node = ofw_bus_get_node(sc->dev); 124 125 fb_config->xres = 0; 126 fb_config->yres = 0; 127 fb_config->bpp = 0; 128 fb_config->vxres = 0; 129 fb_config->vyres = 0; 130 fb_config->xoffset = 0; 131 fb_config->yoffset = 0; 132 fb_config->base = 0; 133 fb_config->pitch = 0; 134 fb_config->screen_size = 0; 135 136 if ((OF_getprop(node, "broadcom,width", &cell, sizeof(cell))) > 0) 137 fb_config->xres = (int)fdt32_to_cpu(cell); 138 if (fb_config->xres == 0) 139 fb_config->xres = FB_WIDTH; 140 141 if ((OF_getprop(node, "broadcom,height", &cell, sizeof(cell))) > 0) 142 fb_config->yres = (uint32_t)fdt32_to_cpu(cell); 143 if (fb_config->yres == 0) 144 fb_config->yres = FB_HEIGHT; 145 146 if ((OF_getprop(node, "broadcom,depth", &cell, sizeof(cell))) > 0) 147 fb_config->bpp = (uint32_t)fdt32_to_cpu(cell); 148 if (fb_config->bpp == 0) 149 fb_config->bpp = FB_DEPTH; 150 151 bus_dmamap_sync(sc->dma_tag, sc->dma_map, 152 BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD); 153 154 mbox = devclass_get_device(devclass_find("mbox"), 0); 155 if (mbox) { 156 MBOX_WRITE(mbox, BCM2835_MBOX_CHAN_FB, sc->fb_config_phys); 157 MBOX_READ(mbox, BCM2835_MBOX_CHAN_FB, &err); 158 } 159 bus_dmamap_sync(sc->dma_tag, sc->dma_map, 160 BUS_DMASYNC_POSTREAD); 161 162 if (fb_config->base != 0) { 163 device_printf(sc->dev, "%dx%d(%dx%d@%d,%d) %dbpp\n", 164 fb_config->xres, fb_config->yres, 165 fb_config->vxres, fb_config->vyres, 166 fb_config->xoffset, fb_config->yoffset, 167 fb_config->bpp); 168 169 device_printf(sc->dev, "pitch %d, base 0x%08x, screen_size %d\n", 170 fb_config->pitch, fb_config->base, 171 fb_config->screen_size); 172 173 info = malloc(sizeof(struct fb_info), M_DEVBUF, 174 M_WAITOK | M_ZERO); 175 info->fb_name = device_get_nameunit(sc->dev); 176 info->fb_vbase = (intptr_t)pmap_mapdev(fb_config->base, 177 fb_config->screen_size); 178 info->fb_pbase = fb_config->base; 179 info->fb_size = fb_config->screen_size; 180 info->fb_bpp = info->fb_depth = fb_config->bpp; 181 info->fb_stride = fb_config->pitch; 182 info->fb_width = fb_config->xres; 183 info->fb_height = fb_config->yres; 184 185 sc->info = info; 186 187 fbd = device_add_child(sc->dev, "fbd", 188 device_get_unit(sc->dev)); 189 if (fbd == NULL) 190 device_printf(sc->dev, "Failed to add fbd child\n"); 191 else if (device_probe_and_attach(fbd) != 0) 192 device_printf(sc->dev, "Failed to attach fbd device\n"); 193 } else { 194 device_printf(sc->dev, "Failed to set framebuffer info\n"); 195 } 196 197 config_intrhook_disestablish(&sc->init_hook); 198 } 199 200 static int 201 bcm_fb_probe(device_t dev) 202 { 203 if (!ofw_bus_is_compatible(dev, "broadcom,bcm2835-fb")) 204 return (ENXIO); 205 206 device_set_desc(dev, "BCM2835 VT framebuffer driver"); 207 208 return (BUS_PROBE_DEFAULT); 209 } 210 211 static int 212 bcm_fb_attach(device_t dev) 213 { 214 struct bcmsc_softc *sc = device_get_softc(dev); 215 int dma_size = sizeof(struct bcm_fb_config); 216 int err; 217 218 sc->dev = dev; 219 220 err = bus_dma_tag_create( 221 bus_get_dma_tag(sc->dev), 222 PAGE_SIZE, 0, /* alignment, boundary */ 223 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 224 BUS_SPACE_MAXADDR, /* highaddr */ 225 NULL, NULL, /* filter, filterarg */ 226 dma_size, 1, /* maxsize, nsegments */ 227 dma_size, 0, /* maxsegsize, flags */ 228 NULL, NULL, /* lockfunc, lockarg */ 229 &sc->dma_tag); 230 231 err = bus_dmamem_alloc(sc->dma_tag, (void **)&sc->fb_config, 0, 232 &sc->dma_map); 233 if (err) { 234 device_printf(dev, "cannot allocate framebuffer\n"); 235 goto fail; 236 } 237 238 err = bus_dmamap_load(sc->dma_tag, sc->dma_map, sc->fb_config, 239 dma_size, bcm_fb_dmamap_cb, &sc->fb_config_phys, BUS_DMA_NOWAIT); 240 241 if (err) { 242 device_printf(dev, "cannot load DMA map\n"); 243 goto fail; 244 } 245 246 /* 247 * We have to wait until interrupts are enabled. 248 * Mailbox relies on it to get data from VideoCore 249 */ 250 sc->init_hook.ich_func = bcm_fb_init; 251 sc->init_hook.ich_arg = sc; 252 253 if (config_intrhook_establish(&sc->init_hook) != 0) { 254 device_printf(dev, "failed to establish intrhook\n"); 255 return (ENOMEM); 256 } 257 258 return (0); 259 260 fail: 261 return (ENXIO); 262 } 263 264 static void 265 bcm_fb_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err) 266 { 267 bus_addr_t *addr; 268 269 if (err) 270 return; 271 272 addr = (bus_addr_t*)arg; 273 *addr = PHYS_TO_VCBUS(segs[0].ds_addr); 274 } 275 276 static struct fb_info * 277 bcm_fb_helper_getinfo(device_t dev) 278 { 279 struct bcmsc_softc *sc; 280 281 sc = device_get_softc(dev); 282 283 return (sc->info); 284 } 285 286 static device_method_t bcm_fb_methods[] = { 287 /* Device interface */ 288 DEVMETHOD(device_probe, bcm_fb_probe), 289 DEVMETHOD(device_attach, bcm_fb_attach), 290 291 /* Framebuffer service methods */ 292 DEVMETHOD(fb_getinfo, bcm_fb_helper_getinfo), 293 294 DEVMETHOD_END 295 }; 296 297 static devclass_t bcm_fb_devclass; 298 299 static driver_t bcm_fb_driver = { 300 "fb", 301 bcm_fb_methods, 302 sizeof(struct bcmsc_softc), 303 }; 304 305 DRIVER_MODULE(bcm2835fb, ofwbus, bcm_fb_driver, bcm_fb_devclass, 0, 0); 306