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 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/kernel.h> 34 #include <sys/fbio.h> 35 36 #include "opt_platform.h" 37 38 #ifdef FDT 39 #include <dev/fdt/fdt_common.h> 40 #include <dev/ofw/ofw_bus.h> 41 #include <dev/ofw/ofw_bus_subr.h> 42 #include <dev/ofw/ofw_pci.h> 43 #include <machine/fdt.h> 44 #endif 45 46 #include <dev/vt/vt.h> 47 #include <dev/vt/hw/fb/vt_fb.h> 48 #include <dev/vt/colors/vt_termcolors.h> 49 50 static vd_init_t vt_efb_init; 51 static vd_probe_t vt_efb_probe; 52 53 static struct vt_driver vt_fb_early_driver = { 54 .vd_name = "efb", 55 .vd_probe = vt_efb_probe, 56 .vd_init = vt_efb_init, 57 .vd_blank = vt_fb_blank, 58 .vd_bitblt_text = vt_fb_bitblt_text, 59 .vd_invalidate_text = vt_fb_invalidate_text, 60 .vd_bitblt_bmp = vt_fb_bitblt_bitmap, 61 .vd_drawrect = vt_fb_drawrect, 62 .vd_setpixel = vt_fb_setpixel, 63 .vd_priority = VD_PRIORITY_GENERIC, 64 }; 65 66 static struct fb_info local_info; 67 VT_DRIVER_DECLARE(vt_efb, vt_fb_early_driver); 68 69 static void 70 #ifdef FDT 71 vt_efb_initialize(struct fb_info *info, phandle_t node) 72 #else 73 vt_efb_initialize(struct fb_info *info) 74 #endif 75 { 76 #ifdef FDT 77 char name[64]; 78 cell_t retval; 79 ihandle_t ih; 80 int i; 81 82 /* Open display device, thereby initializing it */ 83 memset(name, 0, sizeof(name)); 84 OF_package_to_path(node, name, sizeof(name)); 85 ih = OF_open(name); 86 #endif 87 88 /* 89 * Set up the color map 90 */ 91 switch (info->fb_depth) { 92 case 8: 93 vt_config_cons_colors(info, COLOR_FORMAT_RGB, 94 0x7, 5, 0x7, 2, 0x3, 0); 95 break; 96 case 15: 97 vt_config_cons_colors(info, COLOR_FORMAT_RGB, 98 0x1f, 10, 0x1f, 5, 0x1f, 0); 99 break; 100 case 16: 101 vt_config_cons_colors(info, COLOR_FORMAT_RGB, 102 0x1f, 11, 0x3f, 5, 0x1f, 0); 103 break; 104 case 24: 105 case 32: 106 #if BYTE_ORDER == BIG_ENDIAN 107 vt_config_cons_colors(info, 108 COLOR_FORMAT_RGB, 255, 0, 255, 8, 255, 16); 109 #else 110 vt_config_cons_colors(info, 111 COLOR_FORMAT_RGB, 255, 16, 255, 8, 255, 0); 112 #endif 113 #ifdef FDT 114 for (i = 0; i < 16; i++) { 115 OF_call_method("color!", ih, 4, 1, 116 (cell_t)((info->fb_cmap[i] >> 16) & 0xff), 117 (cell_t)((info->fb_cmap[i] >> 8) & 0xff), 118 (cell_t)((info->fb_cmap[i] >> 0) & 0xff), 119 (cell_t)i, &retval); 120 } 121 #endif 122 break; 123 124 default: 125 panic("Unknown color space fb_depth %d", info->fb_depth); 126 break; 127 } 128 } 129 130 static phandle_t 131 vt_efb_get_fbnode() 132 { 133 phandle_t chosen, node; 134 ihandle_t stdout; 135 char type[64]; 136 137 chosen = OF_finddevice("/chosen"); 138 OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)); 139 node = OF_instance_to_package(stdout); 140 if (node != -1) { 141 /* The "/chosen/stdout" present. */ 142 OF_getprop(node, "device_type", type, sizeof(type)); 143 /* Check if it has "display" type. */ 144 if (strcmp(type, "display") == 0) 145 return (node); 146 } 147 /* Try device with name "screen". */ 148 node = OF_finddevice("screen"); 149 150 return (node); 151 } 152 153 static int 154 vt_efb_probe(struct vt_device *vd) 155 { 156 phandle_t node; 157 158 node = vt_efb_get_fbnode(); 159 if (node == -1) 160 return (CN_DEAD); 161 162 if ((OF_getproplen(node, "height") <= 0) || 163 (OF_getproplen(node, "width") <= 0) || 164 (OF_getproplen(node, "depth") <= 0) || 165 (OF_getproplen(node, "linebytes") <= 0)) 166 return (CN_DEAD); 167 168 return (CN_INTERNAL); 169 } 170 171 static int 172 vt_efb_init(struct vt_device *vd) 173 { 174 struct ofw_pci_register pciaddrs[8]; 175 struct fb_info *info; 176 int i, len, n_pciaddrs; 177 phandle_t node; 178 179 if (vd->vd_softc == NULL) 180 vd->vd_softc = (void *)&local_info; 181 182 info = vd->vd_softc; 183 184 node = vt_efb_get_fbnode(); 185 if (node == -1) 186 return (CN_DEAD); 187 188 #define GET(name, var) \ 189 if (OF_getproplen(node, (name)) != sizeof(info->fb_##var)) \ 190 return (CN_DEAD); \ 191 OF_getencprop(node, (name), &info->fb_##var, sizeof(info->fb_##var)); \ 192 if (info->fb_##var == 0) \ 193 return (CN_DEAD); 194 195 GET("height", height) 196 GET("width", width) 197 GET("depth", depth) 198 GET("linebytes", stride) 199 #undef GET 200 201 info->fb_size = info->fb_height * info->fb_stride; 202 203 /* 204 * Get the PCI addresses of the adapter, if present. The node may be the 205 * child of the PCI device: in that case, try the parent for 206 * the assigned-addresses property. 207 */ 208 len = OF_getprop(node, "assigned-addresses", pciaddrs, 209 sizeof(pciaddrs)); 210 if (len == -1) { 211 len = OF_getprop(OF_parent(node), "assigned-addresses", 212 pciaddrs, sizeof(pciaddrs)); 213 } 214 if (len == -1) 215 len = 0; 216 n_pciaddrs = len / sizeof(struct ofw_pci_register); 217 218 /* 219 * Grab the physical address of the framebuffer, and then map it 220 * into our memory space. If the MMU is not yet up, it will be 221 * remapped for us when relocation turns on. 222 */ 223 if (OF_getproplen(node, "address") == sizeof(info->fb_pbase)) { 224 /* XXX We assume #address-cells is 1 at this point. */ 225 OF_getencprop(node, "address", &info->fb_pbase, 226 sizeof(info->fb_pbase)); 227 228 #if defined(__powerpc__) 229 sc->sc_memt = &bs_be_tag; 230 bus_space_map(sc->sc_memt, info->fb_pbase, info->fb_size, 231 BUS_SPACE_MAP_PREFETCHABLE, &info->fb_vbase); 232 #else 233 bus_space_map(fdtbus_bs_tag, info->fb_pbase, info->fb_size, 234 BUS_SPACE_MAP_PREFETCHABLE, 235 (bus_space_handle_t *)&info->fb_vbase); 236 #endif 237 } else { 238 /* 239 * Some IBM systems don't have an address property. Try to 240 * guess the framebuffer region from the assigned addresses. 241 * This is ugly, but there doesn't seem to be an alternative. 242 * Linux does the same thing. 243 */ 244 245 info->fb_pbase = n_pciaddrs; 246 for (i = 0; i < n_pciaddrs; i++) { 247 /* If it is too small, not the framebuffer */ 248 if (pciaddrs[i].size_lo < info->fb_size) 249 continue; 250 /* If it is not memory, it isn't either */ 251 if (!(pciaddrs[i].phys_hi & 252 OFW_PCI_PHYS_HI_SPACE_MEM32)) 253 continue; 254 255 /* This could be the framebuffer */ 256 info->fb_pbase = i; 257 258 /* If it is prefetchable, it certainly is */ 259 if (pciaddrs[i].phys_hi & OFW_PCI_PHYS_HI_PREFETCHABLE) 260 break; 261 } 262 263 if (info->fb_pbase == n_pciaddrs) /* No candidates found */ 264 return (CN_DEAD); 265 266 #if defined(__powerpc__) 267 OF_decode_addr(node, info->fb_pbase, &sc->sc_memt, 268 &info->fb_vbase); 269 #else 270 bus_space_map(fdtbus_bs_tag, info->fb_pbase, info->fb_size, 271 BUS_SPACE_MAP_PREFETCHABLE, 272 (bus_space_handle_t *)&info->fb_vbase); 273 #endif 274 } 275 276 /* blank full size */ 277 len = info->fb_size / 4; 278 for (i = 0; i < len; i++) { 279 ((uint32_t *)info->fb_vbase)[i] = 0; 280 } 281 282 /* Get pixel storage size. */ 283 info->fb_bpp = info->fb_stride / info->fb_width * 8; 284 285 #ifdef FDT 286 vt_efb_initialize(info, node); 287 #else 288 vt_efb_initialize(info); 289 #endif 290 vt_fb_init(vd); 291 292 return (CN_INTERNAL); 293 } 294