1 /* $NetBSD: simplefb.c,v 1.3 2017/12/18 19:06:32 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 "opt_wsdisplay_compat.h" 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: simplefb.c,v 1.3 2017/12/18 19:06:32 jmcneill 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 int error; 74 75 switch (cmd) { 76 case WSDISPLAYIO_GTYPE: 77 *(u_int *)data = WSDISPLAY_TYPE_GENFB; 78 return 0; 79 case WSDISPLAYIO_GET_BUSID: 80 busid = data; 81 busid->bus_type = WSDISPLAYIO_BUS_SOC; 82 return 0; 83 case WSDISPLAYIO_GET_FBINFO: 84 fbi = data; 85 ri = &sc->sc_gen.vd.active->scr_ri; 86 error = wsdisplayio_get_fbinfo(ri, fbi); 87 if (error == 0) 88 fbi->fbi_flags |= WSFB_VRAM_IS_RAM; 89 return error; 90 default: 91 return EPASSTHROUGH; 92 } 93 } 94 95 static paddr_t 96 simplefb_mmap(void *v, void *vs, off_t off, int prot) 97 { 98 struct simplefb_softc * const sc = v; 99 100 if (off < 0 || off >= sc->sc_gen.sc_fbsize) 101 return -1; 102 103 return bus_space_mmap(sc->sc_bst, sc->sc_paddr, off, prot, 104 BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE); 105 } 106 107 static int 108 simplefb_attach_genfb(struct simplefb_softc *sc) 109 { 110 device_t dev = sc->sc_gen.sc_dev; 111 prop_dictionary_t dict = device_properties(dev); 112 const int phandle = sc->sc_phandle; 113 struct genfb_ops ops; 114 uint32_t width, height, stride; 115 uint16_t depth; 116 const char *format; 117 bus_addr_t addr; 118 bus_size_t size; 119 120 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 121 aprint_error(": couldn't get registers\n"); 122 return ENXIO; 123 } 124 125 if (size == 0) { 126 aprint_naive("\n"); 127 aprint_normal(": disabled\n"); 128 return ENXIO; 129 } 130 131 if (of_getprop_uint32(phandle, "width", &width) != 0 || 132 of_getprop_uint32(phandle, "height", &height) != 0 || 133 of_getprop_uint32(phandle, "stride", &stride) != 0 || 134 (format = fdtbus_get_string(phandle, "format")) == NULL) { 135 aprint_error(": missing property in DT\n"); 136 return ENXIO; 137 } 138 139 if (strcmp(format, "a8b8g8r8") == 0 || 140 strcmp(format, "x8r8g8b8") == 0) { 141 depth = 32; 142 } else if (strcmp(format, "r5g6b5") == 0) { 143 depth = 16; 144 } else { 145 aprint_error(": unsupported format '%s'\n", format); 146 return ENXIO; 147 } 148 149 if (bus_space_map(sc->sc_bst, addr, size, BUS_SPACE_MAP_LINEAR, 150 &sc->sc_bsh) != 0) { 151 aprint_error(": failed to map fb\n"); 152 return ENXIO; 153 } 154 155 sc->sc_paddr = addr; 156 157 prop_dictionary_set_uint32(dict, "width", width); 158 prop_dictionary_set_uint32(dict, "height", height); 159 prop_dictionary_set_uint8(dict, "depth", depth); 160 prop_dictionary_set_uint16(dict, "linebytes", stride); 161 prop_dictionary_set_uint32(dict, "address", addr); 162 prop_dictionary_set_uint32(dict, "virtual_address", 163 (uintptr_t)bus_space_vaddr(sc->sc_bst, sc->sc_bsh)); 164 165 genfb_init(&sc->sc_gen); 166 167 if (sc->sc_gen.sc_width == 0 || sc->sc_gen.sc_fbsize == 0) { 168 aprint_normal(": disabled\n"); 169 return ENXIO; 170 } 171 172 aprint_naive("\n"); 173 aprint_normal(": Simple Framebuffer (%ux%u %u-bpp @ 0x%" PRIxBUSADDR ")\n", 174 width, height, depth, addr); 175 176 pmf_device_register1(dev, NULL, NULL, simplefb_shutdown); 177 178 memset(&ops, 0, sizeof(ops)); 179 ops.genfb_ioctl = simplefb_ioctl; 180 ops.genfb_mmap = simplefb_mmap; 181 182 #ifdef WSDISPLAY_MULTICONS 183 const bool is_console = true; 184 #else 185 const bool is_console = phandle == simplefb_console_phandle; 186 if (is_console) 187 aprint_normal_dev(sc->sc_gen.sc_dev, 188 "switching to framebuffer console\n"); 189 #endif 190 191 prop_dictionary_set_bool(dict, "is_console", is_console); 192 193 genfb_attach(&sc->sc_gen, &ops); 194 195 return 0; 196 } 197 198 static int 199 simplefb_match(device_t parent, cfdata_t cf, void *aux) 200 { 201 struct fdt_attach_args * const faa = aux; 202 203 return of_match_compatible(faa->faa_phandle, compatible); 204 } 205 206 static void 207 simplefb_attach(device_t parent, device_t self, void *aux) 208 { 209 struct simplefb_softc * const sc = device_private(self); 210 struct fdt_attach_args * const faa = aux; 211 const int phandle = faa->faa_phandle; 212 213 sc->sc_gen.sc_dev = self; 214 sc->sc_phandle = phandle; 215 sc->sc_bst = faa->faa_bst; 216 217 if (simplefb_attach_genfb(sc) != 0) 218 return; 219 } 220 221 CFATTACH_DECL_NEW(simplefb, sizeof(struct simplefb_softc), 222 simplefb_match, simplefb_attach, NULL, NULL); 223 224 static int 225 simplefb_console_match(int phandle) 226 { 227 return of_match_compatible(phandle, compatible); 228 } 229 230 static void 231 simplefb_console_consinit(struct fdt_attach_args *faa, u_int uart_freq) 232 { 233 simplefb_console_phandle = faa->faa_phandle; 234 genfb_cnattach(); 235 } 236 237 static const struct fdt_console simplefb_fdt_console = { 238 .match = simplefb_console_match, 239 .consinit = simplefb_console_consinit 240 }; 241 242 FDT_CONSOLE(simplefb, &simplefb_fdt_console); 243