diff options
Diffstat (limited to 'sys/arm/at91/at91_rst.c')
| -rw-r--r-- | sys/arm/at91/at91_rst.c | 236 |
1 files changed, 0 insertions, 236 deletions
diff --git a/sys/arm/at91/at91_rst.c b/sys/arm/at91/at91_rst.c deleted file mode 100644 index f20c9f38976c..000000000000 --- a/sys/arm/at91/at91_rst.c +++ /dev/null @@ -1,236 +0,0 @@ -/*- - * SPDX-License-Identifier: BSD-2-Clause-FreeBSD - * - * Copyright (c) 2010 Greg Ansley. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include "opt_platform.h" - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/bus.h> -#include <sys/kernel.h> -#include <sys/module.h> -#include <sys/rman.h> -#include <sys/systm.h> - -#include <machine/bus.h> - -#include <arm/at91/at91var.h> -#include <arm/at91/at91_rstreg.h> -#include <arm/at91/at91board.h> - -#ifdef FDT -#include <dev/ofw/ofw_bus.h> -#include <dev/ofw/ofw_bus_subr.h> -#define FDT_HACKS 1 -#endif - -#define RST_TIMEOUT (5) /* Seconds to hold NRST for hard reset */ -#define RST_TICK (20) /* sample NRST at hz/RST_TICK intervals */ - -#ifndef FDT -static int at91_rst_intr(void *arg); -#endif - -static struct at91_rst_softc { - struct resource *mem_res; /* Memory resource */ - struct resource *irq_res; /* IRQ resource */ - void *intrhand; /* Interrupt handle */ - struct callout tick_ch; /* Tick callout */ - device_t sc_dev; - u_int shutdown; /* Shutdown in progress */ -} *at91_rst_sc; - -static inline uint32_t -RD4(struct at91_rst_softc *sc, bus_size_t off) -{ - - return (bus_read_4(sc->mem_res, off)); -} - -static inline void -WR4(struct at91_rst_softc *sc, bus_size_t off, uint32_t val) -{ - - bus_write_4(sc->mem_res, off, val); -} - -void cpu_reset_sam9g20(void) __attribute__((weak)); -void cpu_reset_sam9g20(void) {} - -void -at91_rst_cpu_reset(void) -{ - - if (at91_rst_sc) { - cpu_reset_sam9g20(); /* May be null */ - - WR4(at91_rst_sc, RST_MR, - RST_MR_ERSTL(0xd) | RST_MR_URSTEN | RST_MR_KEY); - - WR4(at91_rst_sc, RST_CR, - RST_CR_PROCRST | - RST_CR_PERRST | - RST_CR_EXTRST | - RST_CR_KEY); - } - while(1) - continue; -} - -static int -at91_rst_probe(device_t dev) -{ -#ifdef FDT - if (!ofw_bus_is_compatible(dev, "atmel,at91sam9260-rstc")) - return (ENXIO); -#endif - - device_set_desc(dev, "AT91SAM9 Reset Controller"); - return (0); -} - -static int -at91_rst_attach(device_t dev) -{ - struct at91_rst_softc *sc; - const char *cause; - int rid, err = 0; - - at91_rst_sc = sc = device_get_softc(dev); - sc->sc_dev = dev; - - callout_init(&sc->tick_ch, 1); - - rid = 0; - sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, - RF_ACTIVE); - if (sc->mem_res == NULL) { - device_printf(dev, "could not allocate memory resources.\n"); - err = ENOMEM; - goto out; - } - -#ifndef FDT_HACKS - rid = 0; - sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, - RF_ACTIVE | RF_SHAREABLE); - if (sc->irq_res == NULL) { - device_printf(dev, "could not allocate interrupt resources.\n"); - err = ENOMEM; - goto out; - } - - /* Activate the interrupt. */ - err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE, - at91_rst_intr, NULL, sc, &sc->intrhand); - if (err) - device_printf(dev, "could not establish interrupt handler.\n"); -#endif - - WR4(at91_rst_sc, RST_MR, RST_MR_ERSTL(0xd) | RST_MR_URSIEN | RST_MR_KEY); - - switch (RD4(sc, RST_SR) & RST_SR_RST_MASK) { - case RST_SR_RST_POW: - cause = "Power On"; - break; - case RST_SR_RST_WAKE: - cause = "Wake Up"; - break; - case RST_SR_RST_WDT: - cause = "Watchdog"; - break; - case RST_SR_RST_SOFT: - cause = "Software Request"; - break; - case RST_SR_RST_USR: - cause = "External (User)"; - break; - default: - cause = "Unknown"; - break; - } - - device_printf(dev, "Reset cause: %s.\n", cause); -out: - return (err); -} - -#ifndef FDT_HACKS -static void -at91_rst_tick(void *argp) -{ - struct at91_rst_softc *sc = argp; - - if (sc->shutdown++ >= RST_TIMEOUT * RST_TICK) { - /* User released the button in morre than RST_TIMEOUT */ - cpu_reset(); - } else if ((RD4(sc, RST_SR) & RST_SR_NRSTL)) { - /* User released the button in less than RST_TIMEOUT */ - sc->shutdown = 0; - device_printf(sc->sc_dev, "shutting down...\n"); - shutdown_nice(0); - } else { - callout_reset(&sc->tick_ch, hz/RST_TICK, at91_rst_tick, sc); - } -} - -static int -at91_rst_intr(void *argp) -{ - struct at91_rst_softc *sc = argp; - - if (RD4(sc, RST_SR) & RST_SR_URSTS) { - if (sc->shutdown == 0) - callout_reset(&sc->tick_ch, hz/RST_TICK, at91_rst_tick, sc); - return (FILTER_HANDLED); - } - return (FILTER_STRAY); -} -#endif - -static device_method_t at91_rst_methods[] = { - DEVMETHOD(device_probe, at91_rst_probe), - DEVMETHOD(device_attach, at91_rst_attach), - DEVMETHOD_END -}; - -static driver_t at91_rst_driver = { - "at91_rst", - at91_rst_methods, - sizeof(struct at91_rst_softc), -}; - -static devclass_t at91_rst_devclass; - -#ifdef FDT -DRIVER_MODULE(at91_rst, simplebus, at91_rst_driver, at91_rst_devclass, NULL, - NULL); -#else -DRIVER_MODULE(at91_rst, atmelarm, at91_rst_driver, at91_rst_devclass, NULL, - NULL); -#endif |