/* $NetBSD: dbcool_ki2c.c,v 1.3.6.1 2009/01/16 21:58:29 bouyer Exp $ */ /*- * Copyright (C) 2005 Michael Lorenz * Copyright (C) 2008 Paul Goyette * * 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 ``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 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. */ /* * a driver for the dbCool family of environmental controllers found in the * iBook G4 and probably other Apple machines */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: dbcool_ki2c.c,v 1.3.6.1 2009/01/16 21:58:29 bouyer Exp $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/device.h> #include <sys/malloc.h> #include <sys/sysctl.h> #include <uvm/uvm_extern.h> #include <dev/ofw/openfirm.h> #include <macppc/dev/ki2cvar.h> #include <dev/i2c/dbcool_var.h> #include <dev/i2c/dbcool_reg.h> static void dbcool_ki2c_attach(device_t, device_t, void *); static int dbcool_ki2c_match(device_t, cfdata_t, void *); static uint8_t dbcool_ki2c_readreg(struct dbcool_softc *, uint8_t); static void dbcool_ki2c_writereg(struct dbcool_softc *, uint8_t, uint8_t); CFATTACH_DECL_NEW(dbcool_ki2c, sizeof(struct dbcool_softc), dbcool_ki2c_match, dbcool_ki2c_attach, NULL, NULL); int dbcool_ki2c_match(device_t parent, cfdata_t cf, void *aux) { struct ki2c_confargs *ka = aux; char compat[32]; if (strcmp(ka->ka_name, "fan") != 0) return 0; memset(compat, 0, sizeof(compat)); OF_getprop(ka->ka_node, "compatible", compat, sizeof(compat)); if (strcmp(compat, "adt7467") != 0 && strcmp(compat, "adt7460") != 0) return 0; return 1; } void dbcool_ki2c_attach(device_t parent, device_t self, void *aux) { struct dbcool_softc *sc = device_private(self); struct ki2c_confargs *ka = aux; uint8_t ver; aprint_normal("\n"); aprint_naive("\n"); sc->sc_tag = ka->ka_tag; sc->sc_addr = ka->ka_addr & 0xfe; sc->sc_readreg = dbcool_ki2c_readreg; sc->sc_writereg = dbcool_ki2c_writereg; if (dbcool_chip_ident(sc) < 0) { aprint_error_dev(self, "Unrecognized dbCool chip - " "set-up aborted\n"); return; } ver = sc->sc_readreg(sc, DBCOOL_REVISION_REG); if (sc->sc_chip->flags & DBCFLAG_4BIT_VER) aprint_normal_dev(self, "%s dBCool(tm) Controller " "(rev 0x%02x, stepping 0x%02x)\n", sc->sc_chip->name, ver >> 4, ver & 0x0f); else aprint_normal_dev(self, "%s dBCool(tm) Controller " "(rev 0x%04x)\n", sc->sc_chip->name, ver); dbcool_setup(self); if (!pmf_device_register(self, dbcool_pmf_suspend, dbcool_pmf_resume)) aprint_error_dev(self, "couldn't establish power handler\n"); } static uint8_t dbcool_ki2c_readreg(struct dbcool_softc *sc, uint8_t reg) { uint8_t data = 0; iic_acquire_bus(sc->sc_tag, 0); iic_exec(sc->sc_tag, I2C_OP_READ, sc->sc_addr, ®, 1, &data, 1, 0); iic_release_bus(sc->sc_tag, 0); return data; } static void dbcool_ki2c_writereg(struct dbcool_softc *sc, uint8_t reg, uint8_t data) { uint8_t mdata[2] = {reg, data}; iic_acquire_bus(sc->sc_tag, 0); iic_exec(sc->sc_tag, I2C_OP_WRITE, sc->sc_addr, &mdata, 2, NULL, 0, 0); iic_release_bus(sc->sc_tag, 0); }