1/* $NetBSD: dbcool_ki2c.c,v 1.7 2010/12/20 00:25:37 matt Exp $ */ 2 3/*- 4 * Copyright (C) 2005 Michael Lorenz 5 * Copyright (C) 2008 Paul Goyette 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28/* 29 * a driver for the dbCool family of environmental controllers found in the 30 * iBook G4 and probably other Apple machines 31 */ 32 33#include <sys/cdefs.h> 34__KERNEL_RCSID(0, "$NetBSD: dbcool_ki2c.c,v 1.7 2010/12/20 00:25:37 matt Exp $"); 35 36#include <sys/param.h> 37#include <sys/systm.h> 38#include <sys/kernel.h> 39#include <sys/device.h> 40#include <sys/malloc.h> 41#include <sys/sysctl.h> 42 43#include <dev/ofw/openfirm.h> 44#include <macppc/dev/ki2cvar.h> 45 46#include <dev/i2c/dbcool_var.h> 47#include <dev/i2c/dbcool_reg.h> 48 49static void dbcool_ki2c_attach(device_t, device_t, void *); 50static int dbcool_ki2c_match(device_t, cfdata_t, void *); 51static uint8_t dbcool_ki2c_readreg(struct dbcool_chipset *, uint8_t); 52static void dbcool_ki2c_writereg(struct dbcool_chipset *, uint8_t, uint8_t); 53 54CFATTACH_DECL_NEW(dbcool_ki2c, sizeof(struct dbcool_softc), 55 dbcool_ki2c_match, dbcool_ki2c_attach, NULL, NULL); 56 57int 58dbcool_ki2c_match(device_t parent, cfdata_t cf, void *aux) 59{ 60 struct ki2c_confargs *ka = aux; 61 char compat[32]; 62 63 if (strcmp(ka->ka_name, "fan") != 0) 64 return 0; 65 66 memset(compat, 0, sizeof(compat)); 67 OF_getprop(ka->ka_node, "compatible", compat, sizeof(compat)); 68 if (strcmp(compat, "adt7467") != 0 && strcmp(compat, "adt7460") != 0 && 69 strcmp(compat, "adm1030") != 0) 70 return 0; 71 72 return 1; 73} 74 75void 76dbcool_ki2c_attach(device_t parent, device_t self, void *aux) 77{ 78 struct dbcool_softc *sc = device_private(self); 79 struct ki2c_confargs *ka = aux; 80 uint8_t ver; 81 82 aprint_normal("\n"); 83 aprint_naive("\n"); 84 85 sc->sc_dc.dc_tag = ka->ka_tag; 86 sc->sc_dc.dc_addr = ka->ka_addr & 0xfe; 87 sc->sc_dc.dc_readreg = dbcool_ki2c_readreg; 88 sc->sc_dc.dc_writereg = dbcool_ki2c_writereg; 89 90 if (dbcool_chip_ident(&sc->sc_dc) < 0) { 91 aprint_error_dev(self, "Unrecognized dbCool chip - " 92 "set-up aborted\n"); 93 return; 94 } 95 96 ver = sc->sc_dc.dc_readreg(&sc->sc_dc, DBCOOL_REVISION_REG); 97 98 if (sc->sc_dc.dc_chip->flags & DBCFLAG_4BIT_VER) 99 aprint_normal_dev(self, "%s dBCool(tm) Controller " 100 "(rev 0x%02x, stepping 0x%02x)\n", sc->sc_dc.dc_chip->name, 101 ver >> 4, ver & 0x0f); 102 else 103 aprint_normal_dev(self, "%s dBCool(tm) Controller " 104 "(rev 0x%04x)\n", sc->sc_dc.dc_chip->name, ver); 105 106 dbcool_setup(self); 107 108 if (!pmf_device_register(self, dbcool_pmf_suspend, dbcool_pmf_resume)) 109 aprint_error_dev(self, "couldn't establish power handler\n"); 110} 111 112static uint8_t 113dbcool_ki2c_readreg(struct dbcool_chipset *dc, uint8_t reg) 114{ 115 uint8_t data = 0; 116 117 iic_acquire_bus(dc->dc_tag, 0); 118 iic_exec(dc->dc_tag, I2C_OP_READ, dc->dc_addr, ®, 1, &data, 1, 0); 119 iic_release_bus(dc->dc_tag, 0); 120 return data; 121} 122 123static void 124dbcool_ki2c_writereg(struct dbcool_chipset *dc, uint8_t reg, uint8_t data) 125{ 126 uint8_t mdata[2] = {reg, data}; 127 128 iic_acquire_bus(dc->dc_tag, 0); 129 iic_exec(dc->dc_tag, I2C_OP_WRITE, dc->dc_addr, &mdata, 2, NULL, 0, 0); 130 iic_release_bus(dc->dc_tag, 0); 131} 132