1239691Srwatson/*- 2239691Srwatson * Copyright (c) 2012 Robert N. M. Watson 3239691Srwatson * All rights reserved. 4239691Srwatson * 5239691Srwatson * This software was developed by SRI International and the University of 6239691Srwatson * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) 7239691Srwatson * ("CTSRD"), as part of the DARPA CRASH research programme. 8239691Srwatson * 9239691Srwatson * Redistribution and use in source and binary forms, with or without 10239691Srwatson * modification, are permitted provided that the following conditions 11239691Srwatson * are met: 12239691Srwatson * 1. Redistributions of source code must retain the above copyright 13239691Srwatson * notice, this list of conditions and the following disclaimer. 14239691Srwatson * 2. Redistributions in binary form must reproduce the above copyright 15239691Srwatson * notice, this list of conditions and the following disclaimer in the 16239691Srwatson * documentation and/or other materials provided with the distribution. 17239691Srwatson * 18239691Srwatson * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19239691Srwatson * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20239691Srwatson * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21239691Srwatson * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22239691Srwatson * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23239691Srwatson * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24239691Srwatson * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25239691Srwatson * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26239691Srwatson * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27239691Srwatson * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28239691Srwatson * SUCH DAMAGE. 29239691Srwatson */ 30239691Srwatson 31239691Srwatson#include <sys/cdefs.h> 32239691Srwatson__FBSDID("$FreeBSD: releng/11.0/sys/dev/terasic/mtl/terasic_mtl_pixel.c 239691 2012-08-25 22:35:29Z rwatson $"); 33239691Srwatson 34239691Srwatson#include <sys/param.h> 35239691Srwatson#include <sys/bus.h> 36239691Srwatson#include <sys/conf.h> 37239691Srwatson#include <sys/consio.h> /* struct vt_mode */ 38239691Srwatson#include <sys/fbio.h> /* video_adapter_t */ 39239691Srwatson#include <sys/lock.h> 40239691Srwatson#include <sys/mutex.h> 41239691Srwatson#include <sys/rman.h> 42239691Srwatson#include <sys/uio.h> 43239691Srwatson 44239691Srwatson#include <machine/bus.h> 45239691Srwatson#include <machine/resource.h> 46239691Srwatson#include <machine/vm.h> 47239691Srwatson 48239691Srwatson#include <dev/terasic/mtl/terasic_mtl.h> 49239691Srwatson 50239691Srwatsonstatic d_mmap_t terasic_mtl_pixel_mmap; 51239691Srwatsonstatic d_read_t terasic_mtl_pixel_read; 52239691Srwatsonstatic d_write_t terasic_mtl_pixel_write; 53239691Srwatson 54239691Srwatsonstatic struct cdevsw mtl_pixel_cdevsw = { 55239691Srwatson .d_version = D_VERSION, 56239691Srwatson .d_mmap = terasic_mtl_pixel_mmap, 57239691Srwatson .d_read = terasic_mtl_pixel_read, 58239691Srwatson .d_write = terasic_mtl_pixel_write, 59239691Srwatson .d_name = "terasic_mtl_pixel", 60239691Srwatson}; 61239691Srwatson 62239691Srwatson/* 63239691Srwatson * All I/O to/from the MTL pixel device must be 32-bit, and aligned to 32-bit. 64239691Srwatson */ 65239691Srwatsonstatic int 66239691Srwatsonterasic_mtl_pixel_read(struct cdev *dev, struct uio *uio, int flag) 67239691Srwatson{ 68239691Srwatson struct terasic_mtl_softc *sc; 69239691Srwatson u_long offset, size; 70239691Srwatson uint32_t v; 71239691Srwatson int error; 72239691Srwatson 73239691Srwatson if (uio->uio_offset < 0 || uio->uio_offset % 4 != 0 || 74239691Srwatson uio->uio_resid % 4 != 0) 75239691Srwatson return (ENODEV); 76239691Srwatson sc = dev->si_drv1; 77239691Srwatson size = rman_get_size(sc->mtl_pixel_res); 78239691Srwatson error = 0; 79239691Srwatson if ((uio->uio_offset + uio->uio_resid < 0) || 80239691Srwatson (uio->uio_offset + uio->uio_resid > size)) 81239691Srwatson return (ENODEV); 82239691Srwatson while (uio->uio_resid > 0) { 83239691Srwatson offset = uio->uio_offset; 84239691Srwatson if (offset + sizeof(v) > size) 85239691Srwatson return (ENODEV); 86239691Srwatson v = bus_read_4(sc->mtl_pixel_res, offset); 87239691Srwatson error = uiomove(&v, sizeof(v), uio); 88239691Srwatson if (error) 89239691Srwatson return (error); 90239691Srwatson } 91239691Srwatson return (error); 92239691Srwatson} 93239691Srwatson 94239691Srwatsonstatic int 95239691Srwatsonterasic_mtl_pixel_write(struct cdev *dev, struct uio *uio, int flag) 96239691Srwatson{ 97239691Srwatson struct terasic_mtl_softc *sc; 98239691Srwatson u_long offset, size; 99239691Srwatson uint32_t v; 100239691Srwatson int error; 101239691Srwatson 102239691Srwatson if (uio->uio_offset < 0 || uio->uio_offset % 4 != 0 || 103239691Srwatson uio->uio_resid % 4 != 0) 104239691Srwatson return (ENODEV); 105239691Srwatson sc = dev->si_drv1; 106239691Srwatson size = rman_get_size(sc->mtl_pixel_res); 107239691Srwatson error = 0; 108239691Srwatson while (uio->uio_resid > 0) { 109239691Srwatson offset = uio->uio_offset; 110239691Srwatson if (offset + sizeof(v) > size) 111239691Srwatson return (ENODEV); 112239691Srwatson error = uiomove(&v, sizeof(v), uio); 113239691Srwatson if (error) 114239691Srwatson return (error); 115239691Srwatson bus_write_4(sc->mtl_pixel_res, offset, v); 116239691Srwatson } 117239691Srwatson return (error); 118239691Srwatson} 119239691Srwatson 120239691Srwatsonstatic int 121239691Srwatsonterasic_mtl_pixel_mmap(struct cdev *dev, vm_ooffset_t offset, 122239691Srwatson vm_paddr_t *paddr, int nprot, vm_memattr_t *memattr) 123239691Srwatson{ 124239691Srwatson struct terasic_mtl_softc *sc; 125239691Srwatson int error; 126239691Srwatson 127239691Srwatson sc = dev->si_drv1; 128239691Srwatson error = 0; 129239691Srwatson if (trunc_page(offset) == offset && 130239691Srwatson rman_get_size(sc->mtl_pixel_res) >= offset + PAGE_SIZE) { 131239691Srwatson *paddr = rman_get_start(sc->mtl_pixel_res) + offset; 132239691Srwatson *memattr = VM_MEMATTR_UNCACHEABLE; 133239691Srwatson } else 134239691Srwatson error = ENODEV; 135239691Srwatson return (error); 136239691Srwatson} 137239691Srwatson 138239691Srwatsonint 139239691Srwatsonterasic_mtl_pixel_attach(struct terasic_mtl_softc *sc) 140239691Srwatson{ 141239691Srwatson 142239691Srwatson sc->mtl_pixel_cdev = make_dev(&mtl_pixel_cdevsw, sc->mtl_unit, 143239691Srwatson UID_ROOT, GID_WHEEL, 0400, "mtl_pixel%d", sc->mtl_unit); 144239691Srwatson if (sc->mtl_pixel_cdev == NULL) { 145239691Srwatson device_printf(sc->mtl_dev, "%s: make_dev failed\n", __func__); 146239691Srwatson return (ENXIO); 147239691Srwatson } 148239691Srwatson /* XXXRW: Slight race between make_dev(9) and here. */ 149239691Srwatson sc->mtl_pixel_cdev->si_drv1 = sc; 150239691Srwatson return (0); 151239691Srwatson} 152239691Srwatson 153239691Srwatsonvoid 154239691Srwatsonterasic_mtl_pixel_detach(struct terasic_mtl_softc *sc) 155239691Srwatson{ 156239691Srwatson 157239691Srwatson if (sc->mtl_pixel_cdev != NULL) 158239691Srwatson destroy_dev(sc->mtl_pixel_cdev); 159239691Srwatson} 160