1 /* $NetBSD: simplefb.c,v 1.2 2017/09/04 18:01:28 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2017 Jared McNeill <jmcneill@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 <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: simplefb.c,v 1.2 2017/09/04 18:01:28 jmcneill Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/device.h> 35 #include <sys/systm.h> 36 37 #include <dev/fdt/fdtvar.h> 38 39 #include <dev/wsfb/genfbvar.h> 40 41 static const char * const compatible[] = { 42 "simple-framebuffer", 43 NULL 44 }; 45 46 struct simplefb_softc { 47 struct genfb_softc sc_gen; 48 bus_space_tag_t sc_bst; 49 bus_space_handle_t sc_bsh; 50 int sc_phandle; 51 52 bus_addr_t sc_paddr; 53 }; 54 55 static int simplefb_console_phandle = -1; 56 57 static bool 58 simplefb_shutdown(device_t self, int flags) 59 { 60 genfb_enable_polling(self); 61 return true; 62 } 63 64 static int 65 simplefb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, lwp_t *l) 66 { 67 struct simplefb_softc * const sc = v; 68 struct wsdisplayio_bus_id *busid; 69 struct wsdisplayio_fbinfo *fbi; 70 struct rasops_info *ri; 71 int error; 72 73 switch (cmd) { 74 case WSDISPLAYIO_GTYPE: 75 *(u_int *)data = WSDISPLAY_TYPE_GENFB; 76 return 0; 77 case WSDISPLAYIO_GET_BUSID: 78 busid = data; 79 busid->bus_type = WSDISPLAYIO_BUS_SOC; 80 return 0; 81 case WSDISPLAYIO_GET_FBINFO: 82 fbi = data; 83 ri = &sc->sc_gen.vd.active->scr_ri; 84 error = wsdisplayio_get_fbinfo(ri, fbi); 85 if (error == 0) 86 fbi->fbi_flags |= WSFB_VRAM_IS_RAM; 87 return error; 88 default: 89 return EPASSTHROUGH; 90 } 91 } 92 93 static paddr_t 94 simplefb_mmap(void *v, void *vs, off_t off, int prot) 95 { 96 struct simplefb_softc * const sc = v; 97 98 if (off < 0 || off >= sc->sc_gen.sc_fbsize) 99 return -1; 100 101 return bus_space_mmap(sc->sc_bst, sc->sc_paddr, off, prot, 102 BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE); 103 } 104 105 static int 106 simplefb_attach_genfb(struct simplefb_softc *sc) 107 { 108 device_t dev = sc->sc_gen.sc_dev; 109 prop_dictionary_t dict = device_properties(dev); 110 const int phandle = sc->sc_phandle; 111 struct genfb_ops ops; 112 uint32_t width, height, stride; 113 uint16_t depth; 114 const char *format; 115 bus_addr_t addr; 116 bus_size_t size; 117 118 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 119 aprint_error(": couldn't get registers\n"); 120 return ENXIO; 121 } 122 123 if (size == 0) { 124 aprint_naive("\n"); 125 aprint_normal(": disabled\n"); 126 return ENXIO; 127 } 128 129 if (of_getprop_uint32(phandle, "width", &width) != 0 || 130 of_getprop_uint32(phandle, "height", &height) != 0 || 131 of_getprop_uint32(phandle, "stride", &stride) != 0 || 132 (format = fdtbus_get_string(phandle, "format")) == NULL) { 133 aprint_error(": missing property in DT\n"); 134 return ENXIO; 135 } 136 137 if (strcmp(format, "a8b8g8r8") == 0 || 138 strcmp(format, "x8r8g8b8") == 0) { 139 depth = 32; 140 } else if (strcmp(format, "r5g6b5") == 0) { 141 depth = 16; 142 } else { 143 aprint_error(": unsupported format '%s'\n", format); 144 return ENXIO; 145 } 146 147 if (bus_space_map(sc->sc_bst, addr, size, BUS_SPACE_MAP_LINEAR, 148 &sc->sc_bsh) != 0) { 149 aprint_error(": failed to map fb\n"); 150 return ENXIO; 151 } 152 153 sc->sc_paddr = addr; 154 155 prop_dictionary_set_uint32(dict, "width", width); 156 prop_dictionary_set_uint32(dict, "height", height); 157 prop_dictionary_set_uint8(dict, "depth", depth); 158 prop_dictionary_set_uint16(dict, "linebytes", stride); 159 prop_dictionary_set_uint32(dict, "address", addr); 160 prop_dictionary_set_uint32(dict, "virtual_address", 161 (uintptr_t)bus_space_vaddr(sc->sc_bst, sc->sc_bsh)); 162 163 genfb_init(&sc->sc_gen); 164 165 if (sc->sc_gen.sc_width == 0 || sc->sc_gen.sc_fbsize == 0) { 166 aprint_normal(": disabled\n"); 167 return ENXIO; 168 } 169 170 aprint_naive("\n"); 171 aprint_normal(": Simple Framebuffer (%ux%u %u-bpp @ 0x%" PRIxBUSADDR ")\n", 172 width, height, depth, addr); 173 174 pmf_device_register1(dev, NULL, NULL, simplefb_shutdown); 175 176 memset(&ops, 0, sizeof(ops)); 177 ops.genfb_ioctl = simplefb_ioctl; 178 ops.genfb_mmap = simplefb_mmap; 179 180 const bool is_console = phandle == simplefb_console_phandle; 181 182 prop_dictionary_set_bool(dict, "is_console", is_console); 183 184 if (is_console) 185 aprint_normal_dev(sc->sc_gen.sc_dev, 186 "switching to framebuffer console\n"); 187 188 genfb_attach(&sc->sc_gen, &ops); 189 190 return 0; 191 } 192 193 static int 194 simplefb_match(device_t parent, cfdata_t cf, void *aux) 195 { 196 struct fdt_attach_args * const faa = aux; 197 198 return of_match_compatible(faa->faa_phandle, compatible); 199 } 200 201 static void 202 simplefb_attach(device_t parent, device_t self, void *aux) 203 { 204 struct simplefb_softc * const sc = device_private(self); 205 struct fdt_attach_args * const faa = aux; 206 const int phandle = faa->faa_phandle; 207 208 sc->sc_gen.sc_dev = self; 209 sc->sc_phandle = phandle; 210 sc->sc_bst = faa->faa_bst; 211 212 if (simplefb_attach_genfb(sc) != 0) 213 return; 214 } 215 216 CFATTACH_DECL_NEW(simplefb, sizeof(struct simplefb_softc), 217 simplefb_match, simplefb_attach, NULL, NULL); 218 219 static int 220 simplefb_console_match(int phandle) 221 { 222 return of_match_compatible(phandle, compatible); 223 } 224 225 static void 226 simplefb_console_consinit(struct fdt_attach_args *faa, u_int uart_freq) 227 { 228 simplefb_console_phandle = faa->faa_phandle; 229 genfb_cnattach(); 230 } 231 232 static const struct fdt_console simplefb_fdt_console = { 233 .match = simplefb_console_match, 234 .consinit = simplefb_console_consinit 235 }; 236 237 FDT_CONSOLE(simplefb, &simplefb_fdt_console); 238