1 /*- 2 * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 /* 28 * Vybrid Family Timing Controller (TCON) 29 * Chapter 58, Vybrid Reference Manual, Rev. 5, 07/2013 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/bus.h> 38 #include <sys/kernel.h> 39 #include <sys/module.h> 40 #include <sys/malloc.h> 41 #include <sys/rman.h> 42 #include <sys/timeet.h> 43 #include <sys/timetc.h> 44 #include <sys/watchdog.h> 45 46 #include <dev/fdt/fdt_common.h> 47 #include <dev/ofw/openfirm.h> 48 #include <dev/ofw/ofw_bus.h> 49 #include <dev/ofw/ofw_bus_subr.h> 50 51 #include <machine/bus.h> 52 #include <machine/cpu.h> 53 #include <machine/intr.h> 54 55 #include <arm/freescale/vybrid/vf_common.h> 56 57 #define TCON0_CTRL1 0x00 58 #define TCON_BYPASS (1 << 29) 59 60 struct tcon_softc { 61 struct resource *res[1]; 62 bus_space_tag_t bst; 63 bus_space_handle_t bsh; 64 }; 65 66 struct tcon_softc *tcon_sc; 67 68 static struct resource_spec tcon_spec[] = { 69 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 70 { -1, 0 } 71 }; 72 73 uint32_t 74 tcon_bypass(void) 75 { 76 struct tcon_softc *sc; 77 78 if (tcon_sc == NULL) 79 return (1); 80 81 sc = tcon_sc; 82 83 WRITE4(tcon_sc, TCON0_CTRL1, TCON_BYPASS); 84 85 return (0); 86 } 87 88 static int 89 tcon_probe(device_t dev) 90 { 91 92 if (!ofw_bus_status_okay(dev)) 93 return (ENXIO); 94 95 if (!ofw_bus_is_compatible(dev, "fsl,mvf600-tcon")) 96 return (ENXIO); 97 98 device_set_desc(dev, "Vybrid Family Timing Controller (TCON)"); 99 return (BUS_PROBE_DEFAULT); 100 } 101 102 static int 103 tcon_attach(device_t dev) 104 { 105 struct tcon_softc *sc; 106 107 sc = device_get_softc(dev); 108 109 if (bus_alloc_resources(dev, tcon_spec, sc->res)) { 110 device_printf(dev, "could not allocate resources\n"); 111 return (ENXIO); 112 } 113 114 /* Memory interface */ 115 sc->bst = rman_get_bustag(sc->res[0]); 116 sc->bsh = rman_get_bushandle(sc->res[0]); 117 118 tcon_sc = sc; 119 120 return (0); 121 } 122 123 static device_method_t tcon_methods[] = { 124 DEVMETHOD(device_probe, tcon_probe), 125 DEVMETHOD(device_attach, tcon_attach), 126 { 0, 0 } 127 }; 128 129 static driver_t tcon_driver = { 130 "tcon", 131 tcon_methods, 132 sizeof(struct tcon_softc), 133 }; 134 135 static devclass_t tcon_devclass; 136 137 DRIVER_MODULE(tcon, simplebus, tcon_driver, tcon_devclass, 0, 0); 138