1/*- 2 * Copyright (c) 2010 Greg Ansley. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. --- 9 unchanged lines hidden (view full) --- 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 |
26#include "opt_platform.h" 27 |
28#include <sys/cdefs.h> |
29__FBSDID("$FreeBSD: stable/10/sys/arm/at91/at91_rst.c 266196 2014-05-15 21:21:47Z ian $"); |
30 31#include <sys/param.h> 32#include <sys/bus.h> 33#include <sys/kernel.h> 34#include <sys/module.h> 35#include <sys/rman.h> 36#include <sys/systm.h> 37 38#include <machine/bus.h> 39 40#include <arm/at91/at91var.h> 41#include <arm/at91/at91_rstreg.h> 42#include <arm/at91/at91board.h> 43 |
44#ifdef FDT 45#include <dev/fdt/fdt_common.h> 46#include <dev/ofw/ofw_bus.h> 47#include <dev/ofw/ofw_bus_subr.h> 48#define FDT_HACKS 1 49#endif 50 |
51#define RST_TIMEOUT (5) /* Seconds to hold NRST for hard reset */ 52#define RST_TICK (20) /* sample NRST at hz/RST_TICK intervals */ 53 |
54#ifndef FDT |
55static int at91_rst_intr(void *arg); |
56#endif |
57 58static struct at91_rst_softc { 59 struct resource *mem_res; /* Memory resource */ 60 struct resource *irq_res; /* IRQ resource */ 61 void *intrhand; /* Interrupt handle */ 62 struct callout tick_ch; /* Tick callout */ 63 device_t sc_dev; 64 u_int shutdown; /* Shutdown in progress */ --- 34 unchanged lines hidden (view full) --- 99 } 100 while(1) 101 continue; 102} 103 104static int 105at91_rst_probe(device_t dev) 106{ |
107#ifdef FDT 108 if (!ofw_bus_is_compatible(dev, "atmel,at91sam9260-rstc")) 109 return (ENXIO); 110#endif |
111 112 device_set_desc(dev, "AT91SAM9 Reset Controller"); 113 return (0); 114} 115 116static int 117at91_rst_attach(device_t dev) 118{ 119 struct at91_rst_softc *sc; 120 const char *cause; |
121 int rid, err = 0; |
122 123 at91_rst_sc = sc = device_get_softc(dev); 124 sc->sc_dev = dev; 125 126 callout_init(&sc->tick_ch, 0); 127 128 rid = 0; 129 sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 130 RF_ACTIVE); 131 if (sc->mem_res == NULL) { 132 device_printf(dev, "could not allocate memory resources.\n"); 133 err = ENOMEM; 134 goto out; 135 } |
136 137#ifndef FDT_HACKS |
138 rid = 0; 139 sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 140 RF_ACTIVE | RF_SHAREABLE); 141 if (sc->irq_res == NULL) { 142 device_printf(dev, "could not allocate interrupt resources.\n"); 143 err = ENOMEM; 144 goto out; 145 } 146 147 /* Activate the interrupt. */ 148 err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE, 149 at91_rst_intr, NULL, sc, &sc->intrhand); 150 if (err) 151 device_printf(dev, "could not establish interrupt handler.\n"); |
152#endif |
153 154 WR4(at91_rst_sc, RST_MR, RST_MR_ERSTL(0xd) | RST_MR_URSIEN | RST_MR_KEY); 155 156 switch (RD4(sc, RST_SR) & RST_SR_RST_MASK) { 157 case RST_SR_RST_POW: 158 cause = "Power On"; 159 break; 160 case RST_SR_RST_WAKE: --- 13 unchanged lines hidden (view full) --- 174 break; 175 } 176 177 device_printf(dev, "Reset cause: %s.\n", cause); 178out: 179 return (err); 180} 181 |
182#ifndef FDT_HACKS |
183static void 184at91_rst_tick(void *argp) 185{ 186 struct at91_rst_softc *sc = argp; 187 188 if (sc->shutdown++ >= RST_TIMEOUT * RST_TICK) { 189 /* User released the button in morre than RST_TIMEOUT */ 190 cpu_reset(); --- 14 unchanged lines hidden (view full) --- 205 206 if (RD4(sc, RST_SR) & RST_SR_URSTS) { 207 if (sc->shutdown == 0) 208 callout_reset(&sc->tick_ch, hz/RST_TICK, at91_rst_tick, sc); 209 return (FILTER_HANDLED); 210 } 211 return (FILTER_STRAY); 212} |
213#endif |
214 215static device_method_t at91_rst_methods[] = { 216 DEVMETHOD(device_probe, at91_rst_probe), 217 DEVMETHOD(device_attach, at91_rst_attach), 218 DEVMETHOD_END 219}; 220 221static driver_t at91_rst_driver = { 222 "at91_rst", 223 at91_rst_methods, 224 sizeof(struct at91_rst_softc), 225}; 226 227static devclass_t at91_rst_devclass; 228 |
229#ifdef FDT 230DRIVER_MODULE(at91_rst, simplebus, at91_rst_driver, at91_rst_devclass, NULL, 231 NULL); 232#else |
233DRIVER_MODULE(at91_rst, atmelarm, at91_rst_driver, at91_rst_devclass, NULL, 234 NULL); |
235#endif |