1 /*- 2 * Copyright (c) 2013 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 System Reset Controller (SRC) 29 * Chapter 18, 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/fdt.h> 53 #include <machine/cpu.h> 54 #include <machine/intr.h> 55 56 #include <arm/freescale/vybrid/vf_src.h> 57 #include <arm/freescale/vybrid/vf_common.h> 58 59 #define SRC_SCR 0x00 /* SRC Control Register */ 60 #define SRC_SBMR1 0x04 /* SRC Boot Mode Register 1 */ 61 #define SRC_SRSR 0x08 /* SRC Status Register */ 62 #define SRC_SECR 0x0C /* SRC_SECR */ 63 #define SRC_SICR 0x14 /* SRC Reset Interrupt Configuration Register */ 64 #define SRC_SIMR 0x18 /* SRC Interrupt Masking Register */ 65 #define SRC_SBMR2 0x1C /* SRC Boot Mode Register 2 */ 66 #define SRC_GPR0 0x20 /* General Purpose Register */ 67 #define SRC_GPR1 0x24 /* General Purpose Register */ 68 #define SRC_GPR2 0x28 /* General Purpose Register */ 69 #define SRC_GPR3 0x2C /* General Purpose Register */ 70 #define SRC_GPR4 0x30 /* General Purpose Register */ 71 #define SRC_MISC0 0x4C /* MISC0 */ 72 #define SRC_MISC1 0x50 /* MISC1 */ 73 #define SRC_MISC2 0x54 /* MISC2 */ 74 #define SRC_MISC3 0x58 /* MISC3 */ 75 76 struct src_softc { 77 struct resource *res[1]; 78 bus_space_tag_t bst; 79 bus_space_handle_t bsh; 80 }; 81 82 struct src_softc *src_sc; 83 84 static struct resource_spec src_spec[] = { 85 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 86 { -1, 0 } 87 }; 88 89 int 90 src_swreset(void) 91 { 92 93 if (src_sc == NULL) 94 return (1); 95 96 WRITE4(src_sc, SRC_SCR, SW_RST); 97 98 return (0); 99 } 100 101 static int 102 src_probe(device_t dev) 103 { 104 105 if (!ofw_bus_status_okay(dev)) 106 return (ENXIO); 107 108 if (!ofw_bus_is_compatible(dev, "fsl,mvf600-src")) 109 return (ENXIO); 110 111 device_set_desc(dev, "Vybrid Family System Reset Controller"); 112 return (BUS_PROBE_DEFAULT); 113 } 114 115 static int 116 src_attach(device_t dev) 117 { 118 struct src_softc *sc; 119 120 sc = device_get_softc(dev); 121 122 if (bus_alloc_resources(dev, src_spec, sc->res)) { 123 device_printf(dev, "could not allocate resources\n"); 124 return (ENXIO); 125 } 126 127 /* Memory interface */ 128 sc->bst = rman_get_bustag(sc->res[0]); 129 sc->bsh = rman_get_bushandle(sc->res[0]); 130 131 src_sc = sc; 132 133 return (0); 134 } 135 136 static device_method_t src_methods[] = { 137 DEVMETHOD(device_probe, src_probe), 138 DEVMETHOD(device_attach, src_attach), 139 { 0, 0 } 140 }; 141 142 static driver_t src_driver = { 143 "src", 144 src_methods, 145 sizeof(struct src_softc), 146 }; 147 148 static devclass_t src_devclass; 149 150 DRIVER_MODULE(src, simplebus, src_driver, src_devclass, 0, 0); 151