1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2013 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 System Reset Controller (SRC) 31 * Chapter 18, Vybrid Reference Manual, Rev. 5, 07/2013 32 */ 33 34 #include <sys/cdefs.h> 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/ofw/openfirm.h> 47 #include <dev/ofw/ofw_bus.h> 48 #include <dev/ofw/ofw_bus_subr.h> 49 50 #include <machine/bus.h> 51 #include <machine/cpu.h> 52 #include <machine/intr.h> 53 54 #include <arm/freescale/vybrid/vf_src.h> 55 #include <arm/freescale/vybrid/vf_common.h> 56 57 #define SRC_SCR 0x00 /* SRC Control Register */ 58 #define SRC_SBMR1 0x04 /* SRC Boot Mode Register 1 */ 59 #define SRC_SRSR 0x08 /* SRC Status Register */ 60 #define SRC_SECR 0x0C /* SRC_SECR */ 61 #define SRC_SICR 0x14 /* SRC Reset Interrupt Configuration Register */ 62 #define SRC_SIMR 0x18 /* SRC Interrupt Masking Register */ 63 #define SRC_SBMR2 0x1C /* SRC Boot Mode Register 2 */ 64 #define SRC_GPR0 0x20 /* General Purpose Register */ 65 #define SRC_GPR1 0x24 /* General Purpose Register */ 66 #define SRC_GPR2 0x28 /* General Purpose Register */ 67 #define SRC_GPR3 0x2C /* General Purpose Register */ 68 #define SRC_GPR4 0x30 /* General Purpose Register */ 69 #define SRC_MISC0 0x4C /* MISC0 */ 70 #define SRC_MISC1 0x50 /* MISC1 */ 71 #define SRC_MISC2 0x54 /* MISC2 */ 72 #define SRC_MISC3 0x58 /* MISC3 */ 73 74 struct src_softc { 75 struct resource *res[1]; 76 bus_space_tag_t bst; 77 bus_space_handle_t bsh; 78 }; 79 80 struct src_softc *src_sc; 81 82 static struct resource_spec src_spec[] = { 83 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 84 { -1, 0 } 85 }; 86 87 int 88 src_swreset(void) 89 { 90 91 if (src_sc == NULL) 92 return (1); 93 94 WRITE4(src_sc, SRC_SCR, SW_RST); 95 96 return (0); 97 } 98 99 static int 100 src_probe(device_t dev) 101 { 102 103 if (!ofw_bus_status_okay(dev)) 104 return (ENXIO); 105 106 if (!ofw_bus_is_compatible(dev, "fsl,mvf600-src")) 107 return (ENXIO); 108 109 device_set_desc(dev, "Vybrid Family System Reset Controller"); 110 return (BUS_PROBE_DEFAULT); 111 } 112 113 static int 114 src_attach(device_t dev) 115 { 116 struct src_softc *sc; 117 118 sc = device_get_softc(dev); 119 120 if (bus_alloc_resources(dev, src_spec, sc->res)) { 121 device_printf(dev, "could not allocate resources\n"); 122 return (ENXIO); 123 } 124 125 /* Memory interface */ 126 sc->bst = rman_get_bustag(sc->res[0]); 127 sc->bsh = rman_get_bushandle(sc->res[0]); 128 129 src_sc = sc; 130 131 return (0); 132 } 133 134 static device_method_t src_methods[] = { 135 DEVMETHOD(device_probe, src_probe), 136 DEVMETHOD(device_attach, src_attach), 137 { 0, 0 } 138 }; 139 140 static driver_t src_driver = { 141 "src", 142 src_methods, 143 sizeof(struct src_softc), 144 }; 145 146 DRIVER_MODULE(src, simplebus, src_driver, 0, 0); 147