lpc_pwr.c revision 266152
1239278Sgonzo/*- 2239278Sgonzo * Copyright (c) 2011 Jakub Wojciech Klama <jceel@FreeBSD.org> 3239278Sgonzo * All rights reserved. 4239278Sgonzo * 5239278Sgonzo * Redistribution and use in source and binary forms, with or without 6239278Sgonzo * modification, are permitted provided that the following conditions 7239278Sgonzo * are met: 8239278Sgonzo * 1. Redistributions of source code must retain the above copyright 9239278Sgonzo * notice, this list of conditions and the following disclaimer. 10239278Sgonzo * 2. Redistributions in binary form must reproduce the above copyright 11239278Sgonzo * notice, this list of conditions and the following disclaimer in the 12239278Sgonzo * documentation and/or other materials provided with the distribution. 13239278Sgonzo * 14239278Sgonzo * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15239278Sgonzo * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16239278Sgonzo * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17239278Sgonzo * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18239278Sgonzo * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19239278Sgonzo * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20239278Sgonzo * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21239278Sgonzo * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22239278Sgonzo * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23239278Sgonzo * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24239278Sgonzo * SUCH DAMAGE. 25239278Sgonzo * 26239278Sgonzo */ 27239278Sgonzo 28239278Sgonzo#include <sys/cdefs.h> 29239278Sgonzo__FBSDID("$FreeBSD: stable/10/sys/arm/lpc/lpc_pwr.c 266152 2014-05-15 16:11:06Z ian $"); 30239278Sgonzo 31239278Sgonzo#include <sys/param.h> 32239278Sgonzo#include <sys/systm.h> 33239278Sgonzo#include <sys/bus.h> 34239278Sgonzo#include <sys/kernel.h> 35239278Sgonzo#include <sys/module.h> 36239278Sgonzo#include <sys/malloc.h> 37239278Sgonzo#include <sys/rman.h> 38239278Sgonzo#include <machine/bus.h> 39239278Sgonzo#include <machine/intr.h> 40239278Sgonzo 41239278Sgonzo#include <dev/ofw/ofw_bus.h> 42239278Sgonzo#include <dev/ofw/ofw_bus_subr.h> 43239278Sgonzo 44239278Sgonzo#include <arm/lpc/lpcreg.h> 45239278Sgonzo#include <arm/lpc/lpcvar.h> 46239278Sgonzo 47239278Sgonzostruct lpc_pwr_softc { 48239278Sgonzo device_t dp_dev; 49239278Sgonzo struct resource * dp_mem_res; 50239278Sgonzo bus_space_tag_t dp_bst; 51239278Sgonzo bus_space_handle_t dp_bsh; 52239278Sgonzo}; 53239278Sgonzo 54239278Sgonzostatic struct lpc_pwr_softc *lpc_pwr_sc = NULL; 55239278Sgonzo 56239278Sgonzostatic int lpc_pwr_probe(device_t); 57239278Sgonzostatic int lpc_pwr_attach(device_t); 58239278Sgonzo 59239278Sgonzo#define lpc_pwr_read_4(_sc, _reg) \ 60239278Sgonzo bus_space_read_4((_sc)->dp_bst, (_sc)->dp_bsh, _reg) 61239278Sgonzo#define lpc_pwr_write_4(_sc, _reg, _val) \ 62239278Sgonzo bus_space_write_4((_sc)->dp_bst, (_sc)->dp_bsh, _reg, _val) 63239278Sgonzo 64239278Sgonzostatic int 65239278Sgonzolpc_pwr_probe(device_t dev) 66239278Sgonzo{ 67239278Sgonzo 68266152Sian if (!ofw_bus_status_okay(dev)) 69266152Sian return (ENXIO); 70266152Sian 71239278Sgonzo if (!ofw_bus_is_compatible(dev, "lpc,pwr")) 72239278Sgonzo return (ENXIO); 73239278Sgonzo 74239278Sgonzo device_set_desc(dev, "LPC32x0 Power Controller"); 75239278Sgonzo return (BUS_PROBE_DEFAULT); 76239278Sgonzo} 77239278Sgonzo 78239278Sgonzostatic int 79239278Sgonzolpc_pwr_attach(device_t dev) 80239278Sgonzo{ 81239278Sgonzo struct lpc_pwr_softc *sc = device_get_softc(dev); 82239278Sgonzo int rid; 83239278Sgonzo 84239278Sgonzo sc->dp_dev = dev; 85239278Sgonzo 86239278Sgonzo rid = 0; 87239278Sgonzo sc->dp_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 88239278Sgonzo RF_ACTIVE); 89239278Sgonzo if (!sc->dp_mem_res) { 90239278Sgonzo device_printf(dev, "cannot allocate memory window\n"); 91239278Sgonzo return (ENXIO); 92239278Sgonzo } 93239278Sgonzo 94239278Sgonzo sc->dp_bst = rman_get_bustag(sc->dp_mem_res); 95239278Sgonzo sc->dp_bsh = rman_get_bushandle(sc->dp_mem_res); 96239278Sgonzo 97239278Sgonzo lpc_pwr_sc = sc; 98239278Sgonzo 99239278Sgonzo return (0); 100239278Sgonzo} 101239278Sgonzo 102239278Sgonzouint32_t 103239278Sgonzolpc_pwr_read(device_t dev, int reg) 104239278Sgonzo{ 105239278Sgonzo return (lpc_pwr_read_4(lpc_pwr_sc, reg)); 106239278Sgonzo} 107239278Sgonzo 108239278Sgonzovoid 109239278Sgonzolpc_pwr_write(device_t dev, int reg, uint32_t value) 110239278Sgonzo{ 111239278Sgonzo lpc_pwr_write_4(lpc_pwr_sc, reg, value); 112239278Sgonzo} 113239278Sgonzo 114239278Sgonzostatic device_method_t lpc_pwr_methods[] = { 115239278Sgonzo /* Device interface */ 116239278Sgonzo DEVMETHOD(device_probe, lpc_pwr_probe), 117239278Sgonzo DEVMETHOD(device_attach, lpc_pwr_attach), 118239278Sgonzo { 0, 0 } 119239278Sgonzo}; 120239278Sgonzo 121239278Sgonzostatic devclass_t lpc_pwr_devclass; 122239278Sgonzo 123239278Sgonzostatic driver_t lpc_pwr_driver = { 124239278Sgonzo "pwr", 125239278Sgonzo lpc_pwr_methods, 126239278Sgonzo sizeof(struct lpc_pwr_softc), 127239278Sgonzo}; 128239278Sgonzo 129239278SgonzoDRIVER_MODULE(pwr, simplebus, lpc_pwr_driver, lpc_pwr_devclass, 0, 0); 130