terasic_mtl_fdt.c revision 245373
1/*- 2 * Copyright (c) 2012-2013 Robert N. M. Watson 3 * All rights reserved. 4 * 5 * This software was developed by SRI International and the University of 6 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) 7 * ("CTSRD"), as part of the DARPA CRASH research programme. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31#include <sys/cdefs.h> 32__FBSDID("$FreeBSD: head/sys/dev/terasic/mtl/terasic_mtl_fdt.c 245373 2013-01-13 16:27:56Z rwatson $"); 33 34#include <sys/param.h> 35#include <sys/bus.h> 36#include <sys/condvar.h> 37#include <sys/conf.h> 38#include <sys/consio.h> /* struct vt_mode */ 39#include <sys/fbio.h> /* video_adapter_t */ 40#include <sys/kernel.h> 41#include <sys/lock.h> 42#include <sys/malloc.h> 43#include <sys/module.h> 44#include <sys/mutex.h> 45#include <sys/rman.h> 46#include <sys/systm.h> 47 48#include <machine/bus.h> 49#include <machine/resource.h> 50 51#include <dev/fdt/fdt_common.h> 52#include <dev/ofw/openfirm.h> 53#include <dev/ofw/ofw_bus.h> 54#include <dev/ofw/ofw_bus_subr.h> 55 56#include <dev/terasic/mtl/terasic_mtl.h> 57 58static int 59terasic_mtl_fdt_probe(device_t dev) 60{ 61 62 if (ofw_bus_is_compatible(dev, "cambridge,mtl")) { 63 device_set_desc(dev, "Terasic Multi-touch LCD (MTL)"); 64 return (BUS_PROBE_DEFAULT); 65 } 66 return (ENXIO); 67} 68 69static int 70terasic_mtl_fdt_attach(device_t dev) 71{ 72 struct terasic_mtl_softc *sc; 73 int error; 74 75 sc = device_get_softc(dev); 76 sc->mtl_dev = dev; 77 sc->mtl_unit = device_get_unit(dev); 78 79 /* 80 * FDT allows multiple memory resources to be defined for a device; 81 * query them in the order registers, pixel buffer, text buffer. 82 * However, we need to sanity-check that they are page-aligned and 83 * page-sized, so we may still abort. 84 */ 85 sc->mtl_reg_rid = 0; 86 sc->mtl_reg_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 87 &sc->mtl_reg_rid, RF_ACTIVE); 88 if (sc->mtl_reg_res == NULL) { 89 device_printf(dev, "couldn't map register memory\n"); 90 error = ENXIO; 91 goto error; 92 } 93 if (rman_get_start(sc->mtl_reg_res) % PAGE_SIZE != 0) { 94 device_printf(dev, "improper register address"); 95 error = ENXIO; 96 goto error; 97 } 98 if (rman_get_size(sc->mtl_reg_res) % PAGE_SIZE != 0) { 99 device_printf(dev, "improper register size"); 100 error = ENXIO; 101 goto error; 102 } 103 device_printf(sc->mtl_dev, "registers at mem %p-%p\n", 104 (void *)rman_get_start(sc->mtl_reg_res), 105 (void *)(rman_get_start(sc->mtl_reg_res) + 106 rman_get_size(sc->mtl_reg_res))); 107 108 sc->mtl_pixel_rid = 1; 109 sc->mtl_pixel_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 110 &sc->mtl_pixel_rid, RF_ACTIVE); 111 if (sc->mtl_pixel_res == NULL) { 112 device_printf(dev, "couldn't map pixel memory\n"); 113 error = ENXIO; 114 goto error; 115 } 116 if (rman_get_start(sc->mtl_pixel_res) % PAGE_SIZE != 0) { 117 device_printf(dev, "improper pixel address"); 118 error = ENXIO; 119 goto error; 120 } 121 if (rman_get_size(sc->mtl_pixel_res) % PAGE_SIZE != 0) { 122 device_printf(dev, "improper pixel size"); 123 error = ENXIO; 124 goto error; 125 } 126 device_printf(sc->mtl_dev, "pixel frame buffer at mem %p-%p\n", 127 (void *)rman_get_start(sc->mtl_pixel_res), 128 (void *)(rman_get_start(sc->mtl_pixel_res) + 129 rman_get_size(sc->mtl_pixel_res))); 130 131 sc->mtl_text_rid = 2; 132 sc->mtl_text_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 133 &sc->mtl_text_rid, RF_ACTIVE); 134 if (sc->mtl_text_res == NULL) { 135 device_printf(dev, "couldn't map text memory\n"); 136 error = ENXIO; 137 goto error; 138 } 139 if (rman_get_start(sc->mtl_text_res) % PAGE_SIZE != 0) { 140 device_printf(dev, "improper text address"); 141 error = ENXIO; 142 goto error; 143 } 144 if (rman_get_size(sc->mtl_text_res) % PAGE_SIZE != 0) { 145 device_printf(dev, "improper text size"); 146 error = ENXIO; 147 goto error; 148 } 149 device_printf(sc->mtl_dev, "text frame buffer at mem %p-%p\n", 150 (void *)rman_get_start(sc->mtl_text_res), 151 (void *)(rman_get_start(sc->mtl_text_res) + 152 rman_get_size(sc->mtl_text_res))); 153 154 error = terasic_mtl_attach(sc); 155 if (error == 0) 156 return (0); 157error: 158 if (sc->mtl_text_res != NULL) 159 bus_release_resource(dev, SYS_RES_MEMORY, sc->mtl_text_rid, 160 sc->mtl_text_res); 161 if (sc->mtl_pixel_res != NULL) 162 bus_release_resource(dev, SYS_RES_MEMORY, sc->mtl_pixel_rid, 163 sc->mtl_pixel_res); 164 if (sc->mtl_reg_res != NULL) 165 bus_release_resource(dev, SYS_RES_MEMORY, sc->mtl_reg_rid, 166 sc->mtl_reg_res); 167 return (error); 168} 169 170static int 171terasic_mtl_fdt_detach(device_t dev) 172{ 173 struct terasic_mtl_softc *sc; 174 175 sc = device_get_softc(dev); 176 terasic_mtl_detach(sc); 177 bus_release_resource(dev, SYS_RES_MEMORY, sc->mtl_text_rid, 178 sc->mtl_text_res); 179 bus_release_resource(dev, SYS_RES_MEMORY, sc->mtl_pixel_rid, 180 sc->mtl_pixel_res); 181 bus_release_resource(dev, SYS_RES_MEMORY, sc->mtl_reg_rid, 182 sc->mtl_reg_res); 183 return (0); 184} 185 186static device_method_t terasic_mtl_fdt_methods[] = { 187 DEVMETHOD(device_probe, terasic_mtl_fdt_probe), 188 DEVMETHOD(device_attach, terasic_mtl_fdt_attach), 189 DEVMETHOD(device_detach, terasic_mtl_fdt_detach), 190 { 0, 0 } 191}; 192 193static driver_t terasic_mtl_fdt_driver = { 194 "terasic_mtl", 195 terasic_mtl_fdt_methods, 196 sizeof(struct terasic_mtl_softc), 197}; 198 199static devclass_t terasic_mtl_devclass; 200 201DRIVER_MODULE(mtl, simplebus, terasic_mtl_fdt_driver, terasic_mtl_devclass, 0, 202 0); 203