vt_early_fb.c revision 266360
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: stable/10/sys/dev/vt/hw/fb/vt_early_fb.c 266360 2014-05-17 21:31:58Z ian $ 30 */ 31 32#include <sys/cdefs.h> 33__FBSDID("$FreeBSD: stable/10/sys/dev/vt/hw/fb/vt_early_fb.c 266360 2014-05-17 21:31:58Z ian $"); 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/kernel.h> 38#include <sys/fbio.h> 39 40#include "opt_platform.h" 41 42#ifdef FDT 43#include <dev/fdt/fdt_common.h> 44#include <dev/ofw/ofw_bus.h> 45#include <dev/ofw/ofw_bus_subr.h> 46#include <dev/ofw/ofw_pci.h> 47#include <machine/fdt.h> 48#endif 49 50#include <dev/vt/vt.h> 51#include <dev/vt/hw/fb/vt_fb.h> 52#include <dev/vt/colors/vt_termcolors.h> 53 54static vd_init_t vt_efb_init; 55 56static struct vt_driver vt_fb_early_driver = { 57 .vd_init = vt_efb_init, 58 .vd_blank = vt_fb_blank, 59 .vd_bitbltchr = vt_fb_bitbltchr, 60 .vd_priority = VD_PRIORITY_GENERIC, 61}; 62 63static struct fb_info info; 64VT_CONSDEV_DECLARE(vt_fb_early_driver, 65 MAX(80, PIXEL_WIDTH(VT_FB_DEFAULT_WIDTH)), 66 MAX(25, PIXEL_HEIGHT(VT_FB_DEFAULT_HEIGHT)), &info); 67 68static void 69#ifdef FDT 70vt_efb_initialize(struct fb_info *info, phandle_t node) 71#else 72vt_efb_initialize(struct fb_info *info) 73#endif 74{ 75#ifdef FDT 76 char name[64]; 77 cell_t retval; 78 ihandle_t ih; 79 int i; 80 81 /* Open display device, thereby initializing it */ 82 memset(name, 0, sizeof(name)); 83 OF_package_to_path(node, name, sizeof(name)); 84 ih = OF_open(name); 85#endif 86 87 /* 88 * Set up the color map 89 */ 90 switch (info->fb_depth) { 91 case 8: 92 vt_generate_vga_palette(info->fb_cmap, COLOR_FORMAT_RGB, 93 0x7, 5, 0x7, 2, 0x3, 0); 94 break; 95 case 15: 96 vt_generate_vga_palette(info->fb_cmap, COLOR_FORMAT_RGB, 97 0x1f, 10, 0x1f, 5, 0x1f, 0); 98 break; 99 case 16: 100 vt_generate_vga_palette(info->fb_cmap, COLOR_FORMAT_RGB, 101 0x1f, 11, 0x3f, 5, 0x1f, 0); 102 break; 103 case 24: 104 case 32: 105#if BYTE_ORDER == BIG_ENDIAN 106 vt_generate_vga_palette(info->fb_cmap, 107 COLOR_FORMAT_RGB, 255, 16, 255, 8, 255, 0); 108#else 109 vt_generate_vga_palette(info->fb_cmap, 110 COLOR_FORMAT_RGB, 255, 0, 255, 8, 255, 16); 111#endif 112#ifdef FDT 113 for (i = 0; i < 16; i++) { 114 OF_call_method("color!", ih, 4, 1, 115 (cell_t)((info->fb_cmap[i] >> 16) & 0xff), 116 (cell_t)((info->fb_cmap[i] >> 8) & 0xff), 117 (cell_t)((info->fb_cmap[i] >> 0) & 0xff), 118 (cell_t)i, &retval); 119 } 120#endif 121 break; 122 123 default: 124 panic("Unknown color space fb_depth %d", info->fb_depth); 125 break; 126 } 127} 128 129static int 130vt_efb_init(struct vt_device *vd) 131{ 132 struct ofw_pci_register pciaddrs[8]; 133 struct fb_info *info; 134 int i, len, n_pciaddrs; 135 phandle_t chosen, node; 136 ihandle_t stdout; 137 char type[64]; 138 139 info = vd->vd_softc; 140 141 chosen = OF_finddevice("/chosen"); 142 OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)); 143 node = OF_instance_to_package(stdout); 144 if (node == -1) { 145 /* 146 * The "/chosen/stdout" does not exist try 147 * using "screen" directly. 148 */ 149 node = OF_finddevice("screen"); 150 } 151 OF_getprop(node, "device_type", type, sizeof(type)); 152 if (strcmp(type, "display") != 0) 153 return (CN_DEAD); 154 155#define GET(name, var) \ 156 if (OF_getproplen(node, (name)) != sizeof(info->fb_##var)) \ 157 return (CN_DEAD); \ 158 OF_getencprop(node, (name), &info->fb_##var, sizeof(info->fb_##var)); \ 159 if (info->fb_##var == 0) \ 160 return (CN_DEAD); 161 162 GET("height", height) 163 GET("width", width) 164 GET("depth", depth) 165 GET("linebytes", stride) 166#undef GET 167 168 info->fb_size = info->fb_height * info->fb_stride; 169 170 /* 171 * Get the PCI addresses of the adapter, if present. The node may be the 172 * child of the PCI device: in that case, try the parent for 173 * the assigned-addresses property. 174 */ 175 len = OF_getprop(node, "assigned-addresses", pciaddrs, 176 sizeof(pciaddrs)); 177 if (len == -1) { 178 len = OF_getprop(OF_parent(node), "assigned-addresses", 179 pciaddrs, sizeof(pciaddrs)); 180 } 181 if (len == -1) 182 len = 0; 183 n_pciaddrs = len / sizeof(struct ofw_pci_register); 184 185 /* 186 * Grab the physical address of the framebuffer, and then map it 187 * into our memory space. If the MMU is not yet up, it will be 188 * remapped for us when relocation turns on. 189 */ 190 if (OF_getproplen(node, "address") == sizeof(info->fb_pbase)) { 191 /* XXX We assume #address-cells is 1 at this point. */ 192 OF_getencprop(node, "address", &info->fb_pbase, 193 sizeof(info->fb_pbase)); 194 195 #if defined(__powerpc__) 196 sc->sc_memt = &bs_be_tag; 197 bus_space_map(sc->sc_memt, info->fb_pbase, info->fb_size, 198 BUS_SPACE_MAP_PREFETCHABLE, &info->fb_vbase); 199 #elif defined(__sparc64__) 200 OF_decode_addr(node, 0, &space, &phys); 201 sc->sc_memt = &vt_efb_memt[0]; 202 info->addr = sparc64_fake_bustag(space, fb_phys, sc->sc_memt); 203 #else 204 bus_space_map(fdtbus_bs_tag, info->fb_pbase, info->fb_size, 205 BUS_SPACE_MAP_PREFETCHABLE, 206 (bus_space_handle_t *)&info->fb_vbase); 207 #endif 208 } else { 209 /* 210 * Some IBM systems don't have an address property. Try to 211 * guess the framebuffer region from the assigned addresses. 212 * This is ugly, but there doesn't seem to be an alternative. 213 * Linux does the same thing. 214 */ 215 216 info->fb_pbase = n_pciaddrs; 217 for (i = 0; i < n_pciaddrs; i++) { 218 /* If it is too small, not the framebuffer */ 219 if (pciaddrs[i].size_lo < info->fb_size) 220 continue; 221 /* If it is not memory, it isn't either */ 222 if (!(pciaddrs[i].phys_hi & 223 OFW_PCI_PHYS_HI_SPACE_MEM32)) 224 continue; 225 226 /* This could be the framebuffer */ 227 info->fb_pbase = i; 228 229 /* If it is prefetchable, it certainly is */ 230 if (pciaddrs[i].phys_hi & OFW_PCI_PHYS_HI_PREFETCHABLE) 231 break; 232 } 233 234 if (info->fb_pbase == n_pciaddrs) /* No candidates found */ 235 return (CN_DEAD); 236 237 #if defined(__powerpc__) 238 OF_decode_addr(node, info->fb_pbase, &sc->sc_memt, 239 &info->fb_vbase); 240 #elif defined(__sparc64__) 241 OF_decode_addr(node, info->fb_pbase, &space, &info->fb_pbase); 242 sc->sc_memt = &vt_efb_memt[0]; 243 info->fb_vbase = sparc64_fake_bustag(space, info->fb_pbase, 244 sc->sc_memt); 245 #else 246 bus_space_map(fdtbus_bs_tag, info->fb_pbase, info->fb_size, 247 BUS_SPACE_MAP_PREFETCHABLE, 248 (bus_space_handle_t *)&info->fb_vbase); 249 #endif 250 } 251 252 253 /* blank full size */ 254 len = info->fb_size / 4; 255 for (i = 0; i < len; i++) { 256 ((uint32_t *)info->fb_vbase)[i] = 0; 257 } 258 259 /* Get pixel storage size. */ 260 info->fb_bpp = info->fb_stride / info->fb_width * 8; 261 262 /* 263 * Early FB driver work with static window buffer 80x25, so reduce 264 * size to 640x480. 265 */ 266 info->fb_width = VT_FB_DEFAULT_WIDTH; 267 info->fb_height = VT_FB_DEFAULT_HEIGHT; 268 269#ifdef FDT 270 vt_efb_initialize(info, node); 271#else 272 vt_efb_initialize(info); 273#endif 274 fb_probe(info); 275 vt_fb_init(vd); 276 277 278 return (CN_INTERNAL); 279} 280