diff options
Diffstat (limited to 'sys/arm/freescale/vybrid/vf_src.c')
| -rw-r--r-- | sys/arm/freescale/vybrid/vf_src.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/sys/arm/freescale/vybrid/vf_src.c b/sys/arm/freescale/vybrid/vf_src.c new file mode 100644 index 000000000000..c038c816d0de --- /dev/null +++ b/sys/arm/freescale/vybrid/vf_src.c @@ -0,0 +1,145 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2013 Ruslan Bukin <br@bsdpad.com> + * 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 THE 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 THE 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. + */ + +/* + * Vybrid Family System Reset Controller (SRC) + * Chapter 18, Vybrid Reference Manual, Rev. 5, 07/2013 + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/malloc.h> +#include <sys/rman.h> +#include <sys/timeet.h> +#include <sys/timetc.h> +#include <sys/watchdog.h> + +#include <dev/ofw/openfirm.h> +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include <machine/bus.h> +#include <machine/cpu.h> +#include <machine/intr.h> + +#include <arm/freescale/vybrid/vf_src.h> +#include <arm/freescale/vybrid/vf_common.h> + +#define SRC_SCR 0x00 /* SRC Control Register */ +#define SRC_SBMR1 0x04 /* SRC Boot Mode Register 1 */ +#define SRC_SRSR 0x08 /* SRC Status Register */ +#define SRC_SECR 0x0C /* SRC_SECR */ +#define SRC_SICR 0x14 /* SRC Reset Interrupt Configuration Register */ +#define SRC_SIMR 0x18 /* SRC Interrupt Masking Register */ +#define SRC_SBMR2 0x1C /* SRC Boot Mode Register 2 */ +#define SRC_GPR0 0x20 /* General Purpose Register */ +#define SRC_GPR1 0x24 /* General Purpose Register */ +#define SRC_GPR2 0x28 /* General Purpose Register */ +#define SRC_GPR3 0x2C /* General Purpose Register */ +#define SRC_GPR4 0x30 /* General Purpose Register */ +#define SRC_MISC0 0x4C /* MISC0 */ +#define SRC_MISC1 0x50 /* MISC1 */ +#define SRC_MISC2 0x54 /* MISC2 */ +#define SRC_MISC3 0x58 /* MISC3 */ + +struct src_softc { + struct resource *res[1]; + bus_space_tag_t bst; + bus_space_handle_t bsh; +}; + +struct src_softc *src_sc; + +static struct resource_spec src_spec[] = { + { SYS_RES_MEMORY, 0, RF_ACTIVE }, + { -1, 0 } +}; + +int +src_swreset(void) +{ + + if (src_sc == NULL) + return (1); + + WRITE4(src_sc, SRC_SCR, SW_RST); + + return (0); +} + +static int +src_probe(device_t dev) +{ + + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + if (!ofw_bus_is_compatible(dev, "fsl,mvf600-src")) + return (ENXIO); + + device_set_desc(dev, "Vybrid Family System Reset Controller"); + return (BUS_PROBE_DEFAULT); +} + +static int +src_attach(device_t dev) +{ + struct src_softc *sc; + + sc = device_get_softc(dev); + + if (bus_alloc_resources(dev, src_spec, sc->res)) { + device_printf(dev, "could not allocate resources\n"); + return (ENXIO); + } + + /* Memory interface */ + sc->bst = rman_get_bustag(sc->res[0]); + sc->bsh = rman_get_bushandle(sc->res[0]); + + src_sc = sc; + + return (0); +} + +static device_method_t src_methods[] = { + DEVMETHOD(device_probe, src_probe), + DEVMETHOD(device_attach, src_attach), + { 0, 0 } +}; + +static driver_t src_driver = { + "src", + src_methods, + sizeof(struct src_softc), +}; + +DRIVER_MODULE(src, simplebus, src_driver, 0, 0); |