diff options
Diffstat (limited to 'freebsd/sys/arm/lpc/lpc_pwr.c')
| -rw-r--r-- | freebsd/sys/arm/lpc/lpc_pwr.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/freebsd/sys/arm/lpc/lpc_pwr.c b/freebsd/sys/arm/lpc/lpc_pwr.c new file mode 100644 index 00000000..0ea8c6a2 --- /dev/null +++ b/freebsd/sys/arm/lpc/lpc_pwr.c @@ -0,0 +1,131 @@ +#include <machine/rtems-bsd-kernel-space.h> + +/*- + * Copyright (c) 2011 Jakub Wojciech Klama <jceel@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("$FreeBSD$"); + +#include <rtems/bsd/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 <machine/bus.h> +#include <machine/intr.h> + +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include <arm/lpc/lpcreg.h> +#include <arm/lpc/lpcvar.h> + +struct lpc_pwr_softc { + device_t dp_dev; + struct resource * dp_mem_res; + bus_space_tag_t dp_bst; + bus_space_handle_t dp_bsh; +}; + +static struct lpc_pwr_softc *lpc_pwr_sc = NULL; + +static int lpc_pwr_probe(device_t); +static int lpc_pwr_attach(device_t); + +#define lpc_pwr_read_4(_sc, _reg) \ + bus_space_read_4((_sc)->dp_bst, (_sc)->dp_bsh, _reg) +#define lpc_pwr_write_4(_sc, _reg, _val) \ + bus_space_write_4((_sc)->dp_bst, (_sc)->dp_bsh, _reg, _val) + +static int +lpc_pwr_probe(device_t dev) +{ + + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + if (!ofw_bus_is_compatible(dev, "lpc,pwr")) + return (ENXIO); + + device_set_desc(dev, "LPC32x0 Power Controller"); + return (BUS_PROBE_DEFAULT); +} + +static int +lpc_pwr_attach(device_t dev) +{ + struct lpc_pwr_softc *sc = device_get_softc(dev); + int rid; + + sc->dp_dev = dev; + + rid = 0; + sc->dp_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, + RF_ACTIVE); + if (!sc->dp_mem_res) { + device_printf(dev, "cannot allocate memory window\n"); + return (ENXIO); + } + + sc->dp_bst = rman_get_bustag(sc->dp_mem_res); + sc->dp_bsh = rman_get_bushandle(sc->dp_mem_res); + + lpc_pwr_sc = sc; + + return (0); +} + +uint32_t +lpc_pwr_read(device_t dev, int reg) +{ + return (lpc_pwr_read_4(lpc_pwr_sc, reg)); +} + +void +lpc_pwr_write(device_t dev, int reg, uint32_t value) +{ + lpc_pwr_write_4(lpc_pwr_sc, reg, value); +} + +static device_method_t lpc_pwr_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, lpc_pwr_probe), + DEVMETHOD(device_attach, lpc_pwr_attach), + { 0, 0 } +}; + +static devclass_t lpc_pwr_devclass; + +static driver_t lpc_pwr_driver = { + "pwr", + lpc_pwr_methods, + sizeof(struct lpc_pwr_softc), +}; + +DRIVER_MODULE(pwr, simplebus, lpc_pwr_driver, lpc_pwr_devclass, 0, 0); |