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. --- 10 unchanged lines hidden (view full) --- 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 <sys/cdefs.h> |
27__FBSDID("$FreeBSD: head/sys/arm/at91/at91_rst.c 234281 2012-04-14 11:29:32Z marius $"); |
28 29#include <sys/param.h> 30#include <sys/bus.h> 31#include <sys/kernel.h> 32#include <sys/module.h> 33#include <sys/rman.h> 34#include <sys/systm.h> 35 36#include <machine/bus.h> 37 38#include <arm/at91/at91var.h> 39#include <arm/at91/at91_rstreg.h> 40#include <arm/at91/at91board.h> 41 42#define RST_TIMEOUT (5) /* Seconds to hold NRST for hard reset */ |
43#define RST_TICK (20) /* sample NRST at hz/RST_TICK intervals */ |
44 45static int rst_intr(void *arg); 46 47static struct rst_softc { 48 struct resource *mem_res; /* Memory resource */ 49 struct resource *irq_res; /* IRQ resource */ 50 void *intrhand; /* Interrupt handle */ 51 struct callout tick_ch; /* Tick callout */ --- 65 unchanged lines hidden (view full) --- 117 118 switch (RD4(sc, RST_SR) & RST_SR_RST_MASK) { 119 case RST_SR_RST_POW: 120 cause = "Power On"; 121 break; 122 case RST_SR_RST_WAKE: 123 cause = "Wake Up"; 124 break; |
125 case RST_SR_RST_WDT: |
126 cause = "Watchdog"; 127 break; 128 case RST_SR_RST_SOFT: 129 cause = "Software Request"; 130 break; 131 case RST_SR_RST_USR: 132 cause = "External (User)"; 133 break; --- 14 unchanged lines hidden (view full) --- 148{ 149 struct rst_softc *sc = argp; 150 151 if (sc->shutdown++ >= RST_TIMEOUT * RST_TICK) { 152 /* User released the button in morre than RST_TIMEOUT */ 153 cpu_reset(); 154 } else if ((RD4(sc, RST_SR) & RST_SR_NRSTL)) { 155 /* User released the button in less than RST_TIMEOUT */ |
156 sc->shutdown = 0; |
157 device_printf(sc->sc_dev, "shutting down...\n"); 158 shutdown_nice(0); 159 } else { 160 callout_reset(&sc->tick_ch, hz/RST_TICK, rst_tick, sc); 161 } 162} 163 164static int 165rst_intr(void *argp) 166{ 167 struct rst_softc *sc = argp; 168 169 if (RD4(sc, RST_SR) & RST_SR_URSTS) { |
170 if (sc->shutdown == 0) |
171 callout_reset(&sc->tick_ch, hz/RST_TICK, rst_tick, sc); 172 return (FILTER_HANDLED); 173 } 174 return (FILTER_STRAY); 175} 176 177static device_method_t at91_rst_methods[] = { 178 DEVMETHOD(device_probe, at91_rst_probe), 179 DEVMETHOD(device_attach, at91_rst_attach), |
180 DEVMETHOD_END |
181}; 182 183static driver_t at91_rst_driver = { 184 "at91_rst", 185 at91_rst_methods, 186 sizeof(struct rst_softc), 187}; 188 189static devclass_t at91_rst_devclass; 190 |
191DRIVER_MODULE(at91_rst, atmelarm, at91_rst_driver, at91_rst_devclass, NULL, 192 NULL); |
193 194void cpu_reset_sam9g20(void) __attribute__((weak)); 195void cpu_reset_sam9g20(void) {} 196 197void 198cpu_reset(void) 199{ 200 201 if (rst_sc) { |
202 cpu_reset_sam9g20(); /* May be null */ 203 204 WR4(rst_sc, RST_MR, 205 RST_MR_ERSTL(0xd) | RST_MR_URSTEN | RST_MR_KEY); 206 207 WR4(rst_sc, RST_CR, 208 RST_CR_PROCRST | 209 RST_CR_PERRST | 210 RST_CR_EXTRST | 211 RST_CR_KEY); 212 } 213 |
214 for(;;) 215 ; |
216} |