arm_simplefb.c revision 1.2
1/* $NetBSD: arm_simplefb.c,v 1.2 2020/10/19 01:12:14 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 1.2 2020/10/19 01:12:14 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 62extern struct bus_space arm_generic_bs_tag; 63 64static 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 73static 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 84static struct wsdisplay_accessops arm_simplefb_accessops; 85static struct vcons_data arm_simplefb_vcons_data; 86static struct vcons_screen arm_simplefb_screen; 87 88static int 89arm_simplefb_find_node(void) 90{ 91 static const char * simplefb_compatible[] = { "simple-framebuffer", NULL }; 92 int chosen_phandle, child; 93 94 chosen_phandle = OF_finddevice("/chosen"); 95 if (chosen_phandle == -1) 96 return -1; 97 98 for (child = OF_child(chosen_phandle); child; child = OF_peer(child)) { 99 if (!fdtbus_status_okay(child)) 100 continue; 101 if (!of_match_compatible(child, simplefb_compatible)) 102 continue; 103 104 return child; 105 } 106 107 return -1; 108} 109 110static void 111arm_simplefb_init_screen(void *cookie, struct vcons_screen *scr, 112 int existing, long *defattr) 113{ 114 struct arm_simplefb_softc * const sc = cookie; 115 struct rasops_info *ri = &scr->scr_ri; 116 117 ri->ri_width = sc->sc_width; 118 ri->ri_height = sc->sc_height; 119 ri->ri_depth = sc->sc_depth; 120 ri->ri_stride = sc->sc_stride; 121 ri->ri_bits = sc->sc_bits; 122 ri->ri_flg = RI_CENTER | RI_FULLCLEAR | RI_CLEAR; 123 124 if (sc->sc_swapped) { 125 KASSERT(ri->ri_depth == 32); 126 ri->ri_rnum = ri->ri_gnum = ri->ri_bnum = 8; 127 ri->ri_rpos = 8; 128 ri->ri_gpos = 16; 129 ri->ri_bpos = 24; 130 } 131 132 scr->scr_flags |= VCONS_LOADFONT; 133 scr->scr_flags |= VCONS_DONT_READ; 134 135 rasops_init(ri, ri->ri_height / 8, ri->ri_width / 8); 136 ri->ri_caps = WSSCREEN_WSCOLORS | WSSCREEN_HILIT | WSSCREEN_UNDERLINE; 137 rasops_reconfig(ri, sc->sc_height / ri->ri_font->fontheight, 138 sc->sc_width / ri->ri_font->fontwidth); 139 140 ri->ri_hw = scr; 141} 142 143static int 144arm_simplefb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, lwp_t *l) 145{ 146 return EPASSTHROUGH; 147} 148 149static paddr_t 150arm_simplefb_mmap(void *v, void *vs, off_t offset, int prot) 151{ 152 return -1; 153} 154 155static void 156arm_simplefb_pollc(void *v, int on) 157{ 158} 159 160void 161arm_simplefb_preattach(void) 162{ 163 struct arm_simplefb_softc * const sc = &arm_simplefb_softc; 164 struct rasops_info *ri = &arm_simplefb_screen.scr_ri; 165 bus_space_tag_t bst = &arm_generic_bs_tag; 166 bus_space_handle_t bsh; 167 uint32_t width, height, stride; 168 const char *format; 169 bus_addr_t addr; 170 bus_size_t size; 171 uint16_t depth; 172 long defattr; 173 bool swapped = false; 174 175 const int phandle = arm_simplefb_find_node(); 176 if (phandle == -1) 177 return; 178 179 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0 || size == 0) 180 return; 181 182 if (of_getprop_uint32(phandle, "width", &width) != 0 || 183 of_getprop_uint32(phandle, "height", &height) != 0 || 184 of_getprop_uint32(phandle, "stride", &stride) != 0 || 185 (format = fdtbus_get_string(phandle, "format")) == NULL) 186 return; 187 188 if (width == 0 || height == 0) 189 return; 190 191 if (strcmp(format, "a8b8g8r8") == 0 || 192 strcmp(format, "x8r8g8b8") == 0) { 193 depth = 32; 194 } else if (strcmp(format, "r8g8b8a8") == 0 || 195 strcmp(format, "b8g8r8x8") == 0) { 196 depth = 32; 197 swapped = true; 198 } else if (strcmp(format, "r5g6b5") == 0) { 199 depth = 16; 200 } else { 201 return; 202 } 203 204 if (bus_space_map(bst, addr, size, 205 BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE, &bsh) != 0) 206 return; 207 208 sc->sc_width = width; 209 sc->sc_height = height; 210 sc->sc_depth = depth; 211 sc->sc_stride = stride; 212 sc->sc_bits = bus_space_vaddr(bst, bsh); 213 sc->sc_swapped = swapped; 214 215 wsfont_init(); 216 217 arm_simplefb_accessops.ioctl = arm_simplefb_ioctl; 218 arm_simplefb_accessops.mmap = arm_simplefb_mmap; 219 arm_simplefb_accessops.pollc = arm_simplefb_pollc; 220 221 vcons_init(&arm_simplefb_vcons_data, sc, &arm_simplefb_stdscreen, 222 &arm_simplefb_accessops); 223 arm_simplefb_vcons_data.init_screen = arm_simplefb_init_screen; 224 arm_simplefb_vcons_data.use_intr = 0; 225 vcons_init_screen(&arm_simplefb_vcons_data, &arm_simplefb_screen, 1, &defattr); 226 arm_simplefb_screen.scr_flags |= VCONS_SCREEN_IS_STATIC; 227 228 if (ri->ri_rows < 1 || ri->ri_cols < 1) 229 return; 230 231 arm_simplefb_stdscreen.nrows = ri->ri_rows; 232 arm_simplefb_stdscreen.ncols = ri->ri_cols; 233 arm_simplefb_stdscreen.textops = &ri->ri_ops; 234 arm_simplefb_stdscreen.capabilities = ri->ri_caps; 235 236 wsdisplay_preattach(&arm_simplefb_stdscreen, ri, 0, 0, defattr); 237 238 vcons_replay_msgbuf(&arm_simplefb_screen); 239 240#if NPCI > 0 && defined(PCI_NETBSD_CONFIGURE) 241 /* 242 * Let the PCI resource allocator know about our framebuffer. This 243 * protects the VGA device BARs from being reprogrammed when we the 244 * framebuffer is located in VRAM. 245 */ 246 pciconf_resource_reserve(PCI_CONF_MAP_MEM, addr, size); 247#endif 248} 249