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