simplefb.c revision 1.5.2.2
1 /* $NetBSD: simplefb.c,v 1.5.2.2 2020/04/13 08:04:19 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2017 Jared McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include "opt_wsdisplay_compat.h" 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: simplefb.c,v 1.5.2.2 2020/04/13 08:04:19 martin Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/bus.h> 36 #include <sys/device.h> 37 #include <sys/systm.h> 38 39 #include <dev/fdt/fdtvar.h> 40 41 #include <dev/wsfb/genfbvar.h> 42 43 static const char * const compatible[] = { 44 "simple-framebuffer", 45 NULL 46 }; 47 48 struct simplefb_softc { 49 struct genfb_softc sc_gen; 50 bus_space_tag_t sc_bst; 51 bus_space_handle_t sc_bsh; 52 int sc_phandle; 53 54 bus_addr_t sc_paddr; 55 }; 56 57 static int simplefb_console_phandle = -1; 58 59 static bool 60 simplefb_shutdown(device_t self, int flags) 61 { 62 genfb_enable_polling(self); 63 return true; 64 } 65 66 static int 67 simplefb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, lwp_t *l) 68 { 69 struct simplefb_softc * const sc = v; 70 struct wsdisplayio_bus_id *busid; 71 struct wsdisplayio_fbinfo *fbi; 72 struct rasops_info *ri; 73 u_int video; 74 int error; 75 76 switch (cmd) { 77 case WSDISPLAYIO_GTYPE: 78 *(u_int *)data = WSDISPLAY_TYPE_GENFB; 79 return 0; 80 case WSDISPLAYIO_GET_BUSID: 81 busid = data; 82 busid->bus_type = WSDISPLAYIO_BUS_SOC; 83 return 0; 84 case WSDISPLAYIO_GET_FBINFO: 85 fbi = data; 86 ri = &sc->sc_gen.vd.active->scr_ri; 87 error = wsdisplayio_get_fbinfo(ri, fbi); 88 if (error == 0) { 89 /* 90 * XXX 91 * if the fb isn't page aligned, tell wsfb to skip the 92 * unaligned part 93 */ 94 fbi->fbi_fboffset = sc->sc_paddr & PAGE_MASK; 95 fbi->fbi_flags |= WSFB_VRAM_IS_RAM; 96 } 97 return error; 98 case WSDISPLAYIO_SVIDEO: 99 video = *(u_int *)data; 100 if (video == WSDISPLAYIO_VIDEO_OFF) 101 pmf_event_inject(NULL, PMFE_DISPLAY_OFF); 102 else if (video == WSDISPLAYIO_VIDEO_ON) 103 pmf_event_inject(NULL, PMFE_DISPLAY_ON); 104 else 105 return EINVAL; 106 return 0; 107 default: 108 return EPASSTHROUGH; 109 } 110 } 111 112 static paddr_t 113 simplefb_mmap(void *v, void *vs, off_t off, int prot) 114 { 115 struct simplefb_softc * const sc = v; 116 117 if (off < 0 || off >= (sc->sc_paddr & PAGE_MASK) + 118 sc->sc_gen.sc_fbsize) 119 return -1; 120 121 return bus_space_mmap(sc->sc_bst, trunc_page(sc->sc_paddr), off, prot, 122 BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE); 123 } 124 125 static int 126 simplefb_attach_genfb(struct simplefb_softc *sc) 127 { 128 device_t dev = sc->sc_gen.sc_dev; 129 prop_dictionary_t dict = device_properties(dev); 130 const int phandle = sc->sc_phandle; 131 struct genfb_ops ops; 132 uint32_t width, height, stride; 133 uint16_t depth; 134 const char *format; 135 bus_addr_t addr; 136 bus_size_t size; 137 138 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 139 aprint_error(": couldn't get registers\n"); 140 return ENXIO; 141 } 142 143 if (size == 0) { 144 aprint_naive("\n"); 145 aprint_normal(": disabled\n"); 146 return ENXIO; 147 } 148 149 if (of_getprop_uint32(phandle, "width", &width) != 0 || 150 of_getprop_uint32(phandle, "height", &height) != 0 || 151 of_getprop_uint32(phandle, "stride", &stride) != 0 || 152 (format = fdtbus_get_string(phandle, "format")) == NULL) { 153 aprint_error(": missing property in DT\n"); 154 return ENXIO; 155 } 156 157 if (strcmp(format, "a8b8g8r8") == 0 || 158 strcmp(format, "x8r8g8b8") == 0) { 159 depth = 32; 160 } else if (strcmp(format, "r5g6b5") == 0) { 161 depth = 16; 162 } else { 163 aprint_error(": unsupported format '%s'\n", format); 164 return ENXIO; 165 } 166 167 if (bus_space_map(sc->sc_bst, addr, size, 168 BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE, 169 &sc->sc_bsh) != 0) { 170 aprint_error(": failed to map fb\n"); 171 return ENXIO; 172 } 173 174 sc->sc_paddr = addr; 175 176 prop_dictionary_set_uint32(dict, "width", width); 177 prop_dictionary_set_uint32(dict, "height", height); 178 prop_dictionary_set_uint8(dict, "depth", depth); 179 prop_dictionary_set_uint16(dict, "linebytes", stride); 180 prop_dictionary_set_uint32(dict, "address", addr); 181 prop_dictionary_set_uint64(dict, "virtual_address", 182 (uintptr_t)bus_space_vaddr(sc->sc_bst, sc->sc_bsh)); 183 184 genfb_init(&sc->sc_gen); 185 186 if (sc->sc_gen.sc_width == 0 || sc->sc_gen.sc_fbsize == 0) { 187 aprint_normal(": disabled\n"); 188 return ENXIO; 189 } 190 191 aprint_naive("\n"); 192 aprint_normal(": Simple Framebuffer (%ux%u %u-bpp @ 0x%" PRIxBUSADDR ")\n", 193 width, height, depth, addr); 194 195 pmf_device_register1(dev, NULL, NULL, simplefb_shutdown); 196 197 memset(&ops, 0, sizeof(ops)); 198 ops.genfb_ioctl = simplefb_ioctl; 199 ops.genfb_mmap = simplefb_mmap; 200 201 #ifdef WSDISPLAY_MULTICONS 202 const bool is_console = true; 203 genfb_cnattach(); 204 #else 205 const bool is_console = phandle == simplefb_console_phandle; 206 if (is_console) 207 aprint_normal_dev(sc->sc_gen.sc_dev, 208 "switching to framebuffer console\n"); 209 #endif 210 211 prop_dictionary_set_bool(dict, "is_console", is_console); 212 213 genfb_attach(&sc->sc_gen, &ops); 214 215 return 0; 216 } 217 218 static int 219 simplefb_match(device_t parent, cfdata_t cf, void *aux) 220 { 221 struct fdt_attach_args * const faa = aux; 222 223 return of_match_compatible(faa->faa_phandle, compatible); 224 } 225 226 static void 227 simplefb_attach(device_t parent, device_t self, void *aux) 228 { 229 struct simplefb_softc * const sc = device_private(self); 230 struct fdt_attach_args * const faa = aux; 231 const int phandle = faa->faa_phandle; 232 233 sc->sc_gen.sc_dev = self; 234 sc->sc_phandle = phandle; 235 sc->sc_bst = faa->faa_bst; 236 237 if (simplefb_attach_genfb(sc) != 0) 238 return; 239 } 240 241 CFATTACH_DECL_NEW(simplefb, sizeof(struct simplefb_softc), 242 simplefb_match, simplefb_attach, NULL, NULL); 243 244 static int 245 simplefb_console_match(int phandle) 246 { 247 return of_match_compatible(phandle, compatible); 248 } 249 250 static void 251 simplefb_console_consinit(struct fdt_attach_args *faa, u_int uart_freq) 252 { 253 simplefb_console_phandle = faa->faa_phandle; 254 genfb_cnattach(); 255 } 256 257 static const struct fdt_console simplefb_fdt_console = { 258 .match = simplefb_console_match, 259 .consinit = simplefb_console_consinit 260 }; 261 262 FDT_CONSOLE(simplefb, &simplefb_fdt_console); 263
Indexes created Wed Oct 01 18:09:54 GMT 2025