1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com> 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 AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, 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 /* 30 * Vybrid Family Timing Controller (TCON) 31 * Chapter 58, Vybrid Reference Manual, Rev. 5, 07/2013 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/bus.h> 40 #include <sys/kernel.h> 41 #include <sys/module.h> 42 #include <sys/malloc.h> 43 #include <sys/rman.h> 44 #include <sys/timeet.h> 45 #include <sys/timetc.h> 46 #include <sys/watchdog.h> 47 48 #include <dev/ofw/openfirm.h> 49 #include <dev/ofw/ofw_bus.h> 50 #include <dev/ofw/ofw_bus_subr.h> 51 52 #include <machine/bus.h> 53 #include <machine/cpu.h> 54 #include <machine/intr.h> 55 56 #include <arm/freescale/vybrid/vf_common.h> 57 58 #define TCON0_CTRL1 0x00 59 #define TCON_BYPASS (1 << 29) 60 61 struct tcon_softc { 62 struct resource *res[1]; 63 bus_space_tag_t bst; 64 bus_space_handle_t bsh; 65 }; 66 67 struct tcon_softc *tcon_sc; 68 69 static struct resource_spec tcon_spec[] = { 70 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 71 { -1, 0 } 72 }; 73 74 uint32_t 75 tcon_bypass(void) 76 { 77 78 if (tcon_sc == NULL) 79 return (1); 80 81 WRITE4(tcon_sc, TCON0_CTRL1, TCON_BYPASS); 82 83 return (0); 84 } 85 86 static int 87 tcon_probe(device_t dev) 88 { 89 90 if (!ofw_bus_status_okay(dev)) 91 return (ENXIO); 92 93 if (!ofw_bus_is_compatible(dev, "fsl,mvf600-tcon")) 94 return (ENXIO); 95 96 device_set_desc(dev, "Vybrid Family Timing Controller (TCON)"); 97 return (BUS_PROBE_DEFAULT); 98 } 99 100 static int 101 tcon_attach(device_t dev) 102 { 103 struct tcon_softc *sc; 104 105 sc = device_get_softc(dev); 106 107 if (bus_alloc_resources(dev, tcon_spec, sc->res)) { 108 device_printf(dev, "could not allocate resources\n"); 109 return (ENXIO); 110 } 111 112 /* Memory interface */ 113 sc->bst = rman_get_bustag(sc->res[0]); 114 sc->bsh = rman_get_bushandle(sc->res[0]); 115 116 tcon_sc = sc; 117 118 return (0); 119 } 120 121 static device_method_t tcon_methods[] = { 122 DEVMETHOD(device_probe, tcon_probe), 123 DEVMETHOD(device_attach, tcon_attach), 124 { 0, 0 } 125 }; 126 127 static driver_t tcon_driver = { 128 "tcon", 129 tcon_methods, 130 sizeof(struct tcon_softc), 131 }; 132 133 DRIVER_MODULE(tcon, simplebus, tcon_driver, 0, 0); 134