Date: Fri, 13 Nov 2015 23:47:41 +0000 (UTC) From: Oleksandr Tymoshenko <gonzo@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r290807 - head/sys/arm/freescale/imx Message-ID: <201511132347.tADNlfnB072281@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: gonzo Date: Fri Nov 13 23:47:41 2015 New Revision: 290807 URL: https://svnweb.freebsd.org/changeset/base/290807 Log: - Add driver for System-Reset-Controler i.MX6 module - Add API function to reset IPU1 Added: head/sys/arm/freescale/imx/imx6_src.c (contents, props changed) head/sys/arm/freescale/imx/imx6_src.h (contents, props changed) Modified: head/sys/arm/freescale/imx/files.imx6 Modified: head/sys/arm/freescale/imx/files.imx6 ============================================================================== --- head/sys/arm/freescale/imx/files.imx6 Fri Nov 13 23:14:39 2015 (r290806) +++ head/sys/arm/freescale/imx/files.imx6 Fri Nov 13 23:47:41 2015 (r290807) @@ -19,6 +19,7 @@ arm/freescale/imx/imx6_ccm.c standard arm/freescale/imx/imx6_machdep.c standard arm/freescale/imx/imx6_mp.c optional smp arm/freescale/imx/imx6_pl310.c standard +arm/freescale/imx/imx6_src.c standard arm/freescale/imx/imx_iomux.c standard arm/freescale/imx/imx_machdep.c standard arm/freescale/imx/imx_gpt.c standard Added: head/sys/arm/freescale/imx/imx6_src.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/arm/freescale/imx/imx6_src.c Fri Nov 13 23:47:41 2015 (r290807) @@ -0,0 +1,173 @@ +/*- + * Copyright (c) 2015 Oleksandr Tymoshenko <gonzo@freebsd.org> + * 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * System Reset Control for iMX6 + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/bus.h> +#include <sys/rman.h> + +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include <machine/bus.h> + +#include <arm/freescale/imx/imx6_src.h> + +#define SRC_SCR 0 +#define SW_IPU1_RST (1 << 3) + +struct src_softc { + device_t dev; + struct resource *mem_res; +}; + +static struct src_softc *src_sc; + +static inline uint32_t +RD4(struct src_softc *sc, bus_size_t off) +{ + + return (bus_read_4(sc->mem_res, off)); +} + +static inline void +WR4(struct src_softc *sc, bus_size_t off, uint32_t val) +{ + + bus_write_4(sc->mem_res, off, val); +} + +int +src_reset_ipu() +{ + uint32_t reg; + int timeout = 10000; + + if (src_sc == NULL) + return (-1); + + reg = RD4(src_sc, SRC_SCR); + reg |= SW_IPU1_RST; + WR4(src_sc, SRC_SCR, reg); + + while (timeout-- > 0) { + reg = RD4(src_sc, SRC_SCR); + if (reg & SW_IPU1_RST) + DELAY(1); + else + break; + } + + if (timeout < 0) + return (-1); + else + return (0); +} + +static int +src_detach(device_t dev) +{ + struct src_softc *sc; + + sc = device_get_softc(dev); + + if (sc->mem_res != NULL) + bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res); + + return (0); +} + +static int +src_attach(device_t dev) +{ + struct src_softc *sc; + int err, rid; + + sc = device_get_softc(dev); + err = 0; + + /* Allocate bus_space resources. */ + rid = 0; + sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, + RF_ACTIVE); + if (sc->mem_res == NULL) { + device_printf(dev, "Cannot allocate memory resources\n"); + err = ENXIO; + goto out; + } + + src_sc = sc; + + err = 0; + +out: + + if (err != 0) + src_detach(dev); + + return (err); +} + +static int +src_probe(device_t dev) +{ + + if ((ofw_bus_is_compatible(dev, "fsl,imx6q-src") == 0) && + (ofw_bus_is_compatible(dev, "fsl,imx6-src") == 0)) + return (ENXIO); + + device_set_desc(dev, "Freescale i.MX6 System Reset Controller"); + + return (BUS_PROBE_DEFAULT); +} + +static device_method_t src_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, src_probe), + DEVMETHOD(device_attach, src_attach), + DEVMETHOD(device_detach, src_detach), + + DEVMETHOD_END +}; + +static driver_t src_driver = { + "src", + src_methods, + sizeof(struct src_softc) +}; + +static devclass_t src_devclass; + +DRIVER_MODULE(src, simplebus, src_driver, src_devclass, 0, 0); Added: head/sys/arm/freescale/imx/imx6_src.h ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/arm/freescale/imx/imx6_src.h Fri Nov 13 23:47:41 2015 (r290807) @@ -0,0 +1,34 @@ +/*- + * Copyright (c) 2015 Oleksandr Tymoshenko <gonzo@freebsd.org> + * 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. + * + * $FreeBSD$ + */ + +#ifndef __IMX6_SRC_H__ +#define __IMX6_SRC_H__ + +int src_reset_ipu(void); + +#endif /* __IMX6_SRC_H__ */
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201511132347.tADNlfnB072281>