1 /* $NetBSD: arm_simplefb.c,v 1.4 2020/10/21 11:06:13 rin Exp $ */ 2 3 /*- 4 * Copyright (c) 2019 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jared McNeill <jmcneill@invisible.ca>. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include "pci.h" 33 #include "opt_pci.h" 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: arm_simplefb.c,v 1.4 2020/10/21 11:06:13 rin Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/bus.h> 40 #include <sys/cpu.h> 41 #include <sys/device.h> 42 43 #include <dev/fdt/fdtvar.h> 44 #include <arm/fdt/arm_fdtvar.h> 45 46 #include <dev/wscons/wsconsio.h> 47 #include <dev/wscons/wsdisplayvar.h> 48 #include <dev/rasops/rasops.h> 49 #include <dev/wsfont/wsfont.h> 50 #include <dev/wscons/wsdisplay_vconsvar.h> 51 52 #if NPCI > 0 && defined(PCI_NETBSD_CONFIGURE) 53 #include <dev/pci/pcireg.h> 54 #include <dev/pci/pcivar.h> 55 #include <dev/pci/pciconf.h> 56 #endif 57 58 #include <arm/fdt/arm_simplefb.h> 59 60 #include <libfdt.h> 61 62 extern struct bus_space arm_generic_bs_tag; 63 64 static struct arm_simplefb_softc { 65 uint32_t sc_width; 66 uint32_t sc_height; 67 uint32_t sc_stride; 68 uint16_t sc_depth; 69 bool sc_swapped; 70 void *sc_bits; 71 } arm_simplefb_softc; 72 73 static struct wsscreen_descr arm_simplefb_stdscreen = { 74 .name = "std", 75 .ncols = 0, 76 .nrows = 0, 77 .textops = NULL, 78 .fontwidth = 0, 79 .fontheight = 0, 80 .capabilities = 0, 81 .modecookie = NULL 82 }; 83 84 static struct wsdisplay_accessops arm_simplefb_accessops; 85 static struct vcons_data arm_simplefb_vcons_data; 86 static struct vcons_screen arm_simplefb_screen; 87 88 static bus_addr_t arm_simplefb_addr; 89 static bus_size_t arm_simplefb_size; 90 static bus_space_handle_t arm_simplefb_bsh; 91 92 static int 93 arm_simplefb_find_node(void) 94 { 95 static const char * simplefb_compatible[] = { "simple-framebuffer", NULL }; 96 int chosen_phandle, child; 97 98 chosen_phandle = OF_finddevice("/chosen"); 99 if (chosen_phandle == -1) 100 return -1; 101 102 for (child = OF_child(chosen_phandle); child; child = OF_peer(child)) { 103 if (!fdtbus_status_okay(child)) 104 continue; 105 if (!of_match_compatible(child, simplefb_compatible)) 106 continue; 107 108 return child; 109 } 110 111 return -1; 112 } 113 114 static void 115 arm_simplefb_init_screen(void *cookie, struct vcons_screen *scr, 116 int existing, long *defattr) 117 { 118 struct arm_simplefb_softc * const sc = cookie; 119 struct rasops_info *ri = &scr->scr_ri; 120 121 ri->ri_width = sc->sc_width; 122 ri->ri_height = sc->sc_height; 123 ri->ri_depth = sc->sc_depth; 124 ri->ri_stride = sc->sc_stride; 125 ri->ri_bits = sc->sc_bits; 126 ri->ri_flg = RI_CENTER | RI_FULLCLEAR | RI_CLEAR; 127 128 if (sc->sc_swapped) { 129 KASSERT(ri->ri_depth == 32); 130 ri->ri_rnum = ri->ri_gnum = ri->ri_bnum = 8; 131 ri->ri_rpos = 8; 132 ri->ri_gpos = 16; 133 ri->ri_bpos = 24; 134 } 135 136 scr->scr_flags |= VCONS_LOADFONT; 137 scr->scr_flags |= VCONS_DONT_READ; 138 139 rasops_init(ri, ri->ri_height / 8, ri->ri_width / 8); 140 ri->ri_caps = WSSCREEN_WSCOLORS | WSSCREEN_HILIT | WSSCREEN_UNDERLINE; 141 rasops_reconfig(ri, sc->sc_height / ri->ri_font->fontheight, 142 sc->sc_width / ri->ri_font->fontwidth); 143 144 ri->ri_hw = scr; 145 } 146 147 static int 148 arm_simplefb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, lwp_t *l) 149 { 150 return EPASSTHROUGH; 151 } 152 153 static paddr_t 154 arm_simplefb_mmap(void *v, void *vs, off_t offset, int prot) 155 { 156 return -1; 157 } 158 159 static void 160 arm_simplefb_pollc(void *v, int on) 161 { 162 } 163 164 #if NPCI > 0 && defined(PCI_NETBSD_CONFIGURE) 165 static void 166 arm_simplefb_reconfig(void *arg, uint64_t new_addr) 167 { 168 struct arm_simplefb_softc * const sc = &arm_simplefb_softc; 169 struct rasops_info *ri = &arm_simplefb_screen.scr_ri; 170 bus_space_tag_t bst = &arm_generic_bs_tag; 171 172 bus_space_unmap(bst, arm_simplefb_bsh, arm_simplefb_size); 173 bus_space_map(bst, new_addr, arm_simplefb_size, 174 BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE, &arm_simplefb_bsh); 175 176 sc->sc_bits = bus_space_vaddr(bst, arm_simplefb_bsh); 177 ri->ri_bits = sc->sc_bits; 178 179 arm_simplefb_addr = (bus_addr_t)new_addr; 180 } 181 #endif 182 183 uint64_t 184 arm_simplefb_physaddr(void) 185 { 186 return arm_simplefb_addr; 187 } 188 189 void 190 arm_simplefb_preattach(void) 191 { 192 struct arm_simplefb_softc * const sc = &arm_simplefb_softc; 193 struct rasops_info *ri = &arm_simplefb_screen.scr_ri; 194 bus_space_tag_t bst = &arm_generic_bs_tag; 195 bus_space_handle_t bsh; 196 uint32_t width, height, stride; 197 const char *format; 198 bus_addr_t addr; 199 bus_size_t size; 200 uint16_t depth; 201 long defattr; 202 bool swapped = false; 203 204 const int phandle = arm_simplefb_find_node(); 205 if (phandle == -1) 206 return; 207 208 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0 || size == 0) 209 return; 210 211 if (of_getprop_uint32(phandle, "width", &width) != 0 || 212 of_getprop_uint32(phandle, "height", &height) != 0 || 213 of_getprop_uint32(phandle, "stride", &stride) != 0 || 214 (format = fdtbus_get_string(phandle, "format")) == NULL) 215 return; 216 217 if (width == 0 || height == 0) 218 return; 219 220 if (strcmp(format, "a8b8g8r8") == 0 || 221 strcmp(format, "x8r8g8b8") == 0) { 222 depth = 32; 223 } else if (strcmp(format, "r8g8b8a8") == 0 || 224 strcmp(format, "b8g8r8x8") == 0) { 225 depth = 32; 226 swapped = true; 227 } else if (strcmp(format, "r5g6b5") == 0) { 228 depth = 16; 229 } else { 230 return; 231 } 232 233 if (bus_space_map(bst, addr, size, 234 BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE, &bsh) != 0) 235 return; 236 237 arm_simplefb_addr = addr; 238 arm_simplefb_size = size; 239 arm_simplefb_bsh = bsh; 240 241 sc->sc_width = width; 242 sc->sc_height = height; 243 sc->sc_depth = depth; 244 sc->sc_stride = stride; 245 sc->sc_bits = bus_space_vaddr(bst, bsh); 246 sc->sc_swapped = swapped; 247 248 wsfont_init(); 249 250 arm_simplefb_accessops.ioctl = arm_simplefb_ioctl; 251 arm_simplefb_accessops.mmap = arm_simplefb_mmap; 252 arm_simplefb_accessops.pollc = arm_simplefb_pollc; 253 254 vcons_init(&arm_simplefb_vcons_data, sc, &arm_simplefb_stdscreen, 255 &arm_simplefb_accessops); 256 arm_simplefb_vcons_data.init_screen = arm_simplefb_init_screen; 257 arm_simplefb_vcons_data.use_intr = 0; 258 vcons_init_screen(&arm_simplefb_vcons_data, &arm_simplefb_screen, 1, &defattr); 259 arm_simplefb_screen.scr_flags |= VCONS_SCREEN_IS_STATIC; 260 261 if (ri->ri_rows < 1 || ri->ri_cols < 1) 262 return; 263 264 arm_simplefb_stdscreen.nrows = ri->ri_rows; 265 arm_simplefb_stdscreen.ncols = ri->ri_cols; 266 arm_simplefb_stdscreen.textops = &ri->ri_ops; 267 arm_simplefb_stdscreen.capabilities = ri->ri_caps; 268 269 wsdisplay_preattach(&arm_simplefb_stdscreen, ri, 0, 0, defattr); 270 271 vcons_replay_msgbuf(&arm_simplefb_screen); 272 273 #if NPCI > 0 && defined(PCI_NETBSD_CONFIGURE) 274 /* 275 * Let the PCI resource allocator know about our framebuffer. This 276 * lets us know if the FB base address changes so we can remap the 277 * framebuffer if necessary. 278 */ 279 pciconf_resource_reserve(PCI_CONF_MAP_MEM, addr, size, 280 arm_simplefb_reconfig, NULL); 281 #endif 282 } 283