simplefb.c revision 1.12
1 /* $NetBSD: simplefb.c,v 1.12 2021/01/27 03:10:21 thorpej 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 1.12 2021/01/27 03:10:21 thorpej 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 struct device_compatible_entry compat_data[] = { 44 { .compat = "simple-framebuffer" }, 45 DEVICE_COMPAT_EOL 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 uint64_t sfb_addr; 136 bus_addr_t addr; 137 bus_size_t size; 138 139 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 140 aprint_error(": couldn't get registers\n"); 141 return ENXIO; 142 } 143 144 if (size == 0) { 145 aprint_naive("\n"); 146 aprint_normal(": disabled\n"); 147 return ENXIO; 148 } 149 150 if (of_getprop_uint32(phandle, "width", &width) != 0 || 151 of_getprop_uint32(phandle, "height", &height) != 0 || 152 of_getprop_uint32(phandle, "stride", &stride) != 0 || 153 (format = fdtbus_get_string(phandle, "format")) == NULL) { 154 aprint_error(": missing property in DT\n"); 155 return ENXIO; 156 } 157 158 if (strcmp(format, "a8b8g8r8") == 0 || 159 strcmp(format, "x8r8g8b8") == 0) { 160 depth = 32; 161 } else if (strcmp(format, "r8g8b8a8") == 0 || 162 strcmp(format, "b8g8r8x8") == 0) { 163 depth = 32; 164 prop_dictionary_set_bool(dict, "is_swapped", true); 165 } else if (strcmp(format, "r5g6b5") == 0) { 166 depth = 16; 167 } else { 168 aprint_error(": unsupported format '%s'\n", format); 169 return ENXIO; 170 } 171 172 /* Device may have been reconfigured. MD code will tell us. */ 173 if (prop_dictionary_get_uint64(dict, "simplefb-physaddr", &sfb_addr) && 174 sfb_addr != 0) { 175 addr = (bus_addr_t)sfb_addr; 176 } 177 178 if (bus_space_map(sc->sc_bst, addr, size, 179 BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE, 180 &sc->sc_bsh) != 0) { 181 aprint_error(": failed to map fb\n"); 182 return ENXIO; 183 } 184 185 sc->sc_paddr = addr; 186 187 prop_dictionary_set_uint32(dict, "width", width); 188 prop_dictionary_set_uint32(dict, "height", height); 189 prop_dictionary_set_uint8(dict, "depth", depth); 190 prop_dictionary_set_uint16(dict, "linebytes", stride); 191 prop_dictionary_set_uint32(dict, "address", addr); 192 prop_dictionary_set_uint64(dict, "virtual_address", 193 (uintptr_t)bus_space_vaddr(sc->sc_bst, sc->sc_bsh)); 194 195 genfb_init(&sc->sc_gen); 196 197 if (sc->sc_gen.sc_width == 0 || sc->sc_gen.sc_fbsize == 0) { 198 aprint_normal(": disabled\n"); 199 return ENXIO; 200 } 201 202 aprint_naive("\n"); 203 aprint_normal(": Simple Framebuffer (%ux%u %u-bpp @ 0x%" PRIxBUSADDR ")\n", 204 width, height, depth, addr); 205 206 pmf_device_register1(dev, NULL, NULL, simplefb_shutdown); 207 208 memset(&ops, 0, sizeof(ops)); 209 ops.genfb_ioctl = simplefb_ioctl; 210 ops.genfb_mmap = simplefb_mmap; 211 212 #ifdef WSDISPLAY_MULTICONS 213 const bool is_console = true; 214 genfb_cnattach(); 215 #else 216 const bool is_console = phandle == simplefb_console_phandle; 217 if (is_console) 218 aprint_normal_dev(sc->sc_gen.sc_dev, 219 "switching to framebuffer console\n"); 220 #endif 221 222 prop_dictionary_set_bool(dict, "is_console", is_console); 223 224 genfb_attach(&sc->sc_gen, &ops); 225 226 return 0; 227 } 228 229 static int 230 simplefb_match(device_t parent, cfdata_t cf, void *aux) 231 { 232 struct fdt_attach_args * const faa = aux; 233 234 return of_compatible_match(faa->faa_phandle, compat_data); 235 } 236 237 static void 238 simplefb_attach(device_t parent, device_t self, void *aux) 239 { 240 struct simplefb_softc * const sc = device_private(self); 241 struct fdt_attach_args * const faa = aux; 242 const int phandle = faa->faa_phandle; 243 244 sc->sc_gen.sc_dev = self; 245 sc->sc_phandle = phandle; 246 sc->sc_bst = faa->faa_bst; 247 248 if (simplefb_attach_genfb(sc) != 0) 249 return; 250 } 251 252 CFATTACH_DECL_NEW(simplefb, sizeof(struct simplefb_softc), 253 simplefb_match, simplefb_attach, NULL, NULL); 254 255 static int 256 simplefb_console_match(int phandle) 257 { 258 return of_compatible_match(phandle, compat_data); 259 } 260 261 static void 262 simplefb_console_consinit(struct fdt_attach_args *faa, u_int uart_freq) 263 { 264 simplefb_console_phandle = faa->faa_phandle; 265 genfb_cnattach(); 266 } 267 268 static const struct fdt_console simplefb_fdt_console = { 269 .match = simplefb_console_match, 270 .consinit = simplefb_console_consinit 271 }; 272 273 FDT_CONSOLE(simplefb, &simplefb_fdt_console); 274
Indexes created Fri Sep 26 20:09:58 GMT 2025