Changeset View
Changeset View
Standalone View
Standalone View
head/sys/mips/mediatek/mtk_reset.c
| Property | Old Value | New Value |
|---|---|---|
| svn:eol-style | null | native \ No newline at end of property |
| svn:keywords | null | FreeBSD=%H \ No newline at end of property |
| svn:mime-type | null | text/plain \ No newline at end of property |
| /*- | |||||
| * Copyright (c) 2016 Stanislav Galabov | |||||
| * 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, | |||||
| * without modification, immediately at the beginning of the file. | |||||
| * 2. The name of the author may not be used to endorse or promote products | |||||
| * derived from this software without specific prior written permission. | |||||
| * | |||||
| * 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("$FreeBSD$"); | |||||
| #include <sys/param.h> | |||||
| #include <sys/kernel.h> | |||||
| #include <sys/bus.h> | |||||
| #include <sys/module.h> | |||||
| #include <dev/fdt/fdt_common.h> | |||||
| #include <dev/ofw/openfirm.h> | |||||
| #include <dev/ofw/ofw_bus.h> | |||||
| #include <dev/ofw/ofw_bus_subr.h> | |||||
| #include <mips/mediatek/fdt_reset.h> | |||||
| #include <mips/mediatek/mtk_sysctl.h> | |||||
| #include "fdt_reset_if.h" | |||||
| static const struct ofw_compat_data compat_data[] = { | |||||
| { "ralink,rt2880-reset", 1 }, | |||||
| /* Sentinel */ | |||||
| { NULL, 0 } | |||||
| }; | |||||
| static int | |||||
| mtk_reset_probe(device_t dev) | |||||
| { | |||||
| if (!ofw_bus_status_okay(dev)) | |||||
| return (ENXIO); | |||||
| if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) | |||||
| return (ENXIO); | |||||
| device_set_desc(dev, "MTK Reset Controller"); | |||||
| return (0); | |||||
| } | |||||
| static int | |||||
| mtk_reset_attach(device_t dev) | |||||
| { | |||||
| if (device_get_unit(dev) != 0) { | |||||
| device_printf(dev, "Only one reset control allowed\n"); | |||||
| return (ENXIO); | |||||
| } | |||||
| fdt_reset_register_provider(dev); | |||||
| return (0); | |||||
| } | |||||
| #define RESET_ASSERT 1 | |||||
| #define RESET_DEASSERT 0 | |||||
| static int | |||||
| mtk_reset_set(device_t dev, int index, int value) | |||||
| { | |||||
| uint32_t mask; | |||||
| /* index 0 is SoC reset, indices 1 - 31 are valid peripheral resets */ | |||||
| if (index < 1 || index > 31) | |||||
| return (EINVAL); | |||||
| mask = (1u << index); | |||||
| if (value == RESET_ASSERT) | |||||
| mtk_sysctl_clr_set(SYSCTL_RSTCTRL, 0, mask); | |||||
| else | |||||
| mtk_sysctl_clr_set(SYSCTL_RSTCTRL, mask, 0); | |||||
| return (0); | |||||
| } | |||||
| static int | |||||
| mtk_reset_assert(device_t dev, int index) | |||||
| { | |||||
| return mtk_reset_set(dev, index, RESET_ASSERT); | |||||
| } | |||||
| static int | |||||
| mtk_reset_deassert(device_t dev, int index) | |||||
| { | |||||
| return mtk_reset_set(dev, index, RESET_DEASSERT); | |||||
| } | |||||
| static device_method_t mtk_reset_methods[] = { | |||||
| DEVMETHOD(device_probe, mtk_reset_probe), | |||||
| DEVMETHOD(device_attach, mtk_reset_attach), | |||||
| /* fdt_reset interface */ | |||||
| DEVMETHOD(fdt_reset_assert, mtk_reset_assert), | |||||
| DEVMETHOD(fdt_reset_deassert, mtk_reset_deassert), | |||||
| DEVMETHOD_END | |||||
| }; | |||||
| static driver_t mtk_reset_driver = { | |||||
| "rstctrl", | |||||
| mtk_reset_methods, | |||||
| 0, | |||||
| }; | |||||
| static devclass_t mtk_reset_devclass; | |||||
| EARLY_DRIVER_MODULE(mtk_reset, simplebus, mtk_reset_driver, mtk_reset_devclass, | |||||
| 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_EARLY); | |||||
| MODULE_DEPEND(mtk_reset, mtk_sysctl, 1, 1, 1); | |||||