1239281Sgonzo/*- 2239281Sgonzo * Copyright (c) 2012 Damjan Marion <dmarion@Freebsd.org> 3239281Sgonzo * All rights reserved. 4239281Sgonzo * 5239281Sgonzo * Redistribution and use in source and binary forms, with or without 6239281Sgonzo * modification, are permitted provided that the following conditions 7239281Sgonzo * are met: 8239281Sgonzo * 1. Redistributions of source code must retain the above copyright 9239281Sgonzo * notice, this list of conditions and the following disclaimer. 10239281Sgonzo * 2. Redistributions in binary form must reproduce the above copyright 11239281Sgonzo * notice, this list of conditions and the following disclaimer in the 12239281Sgonzo * documentation and/or other materials provided with the distribution. 13239281Sgonzo * 14239281Sgonzo * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15239281Sgonzo * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16239281Sgonzo * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17239281Sgonzo * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18239281Sgonzo * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19239281Sgonzo * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20239281Sgonzo * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21239281Sgonzo * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22239281Sgonzo * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23239281Sgonzo * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24239281Sgonzo * SUCH DAMAGE. 25239281Sgonzo */ 26239281Sgonzo 27239281Sgonzo#include <sys/cdefs.h> 28239281Sgonzo__FBSDID("$FreeBSD$"); 29239281Sgonzo/* 30239281Sgonzo* TPS65217 PMIC companion chip for AM335x SoC sitting on I2C bus 31239281Sgonzo*/ 32239281Sgonzo#include <sys/param.h> 33239281Sgonzo#include <sys/systm.h> 34239281Sgonzo#include <sys/kernel.h> 35239281Sgonzo#include <sys/module.h> 36239281Sgonzo#include <sys/clock.h> 37239281Sgonzo#include <sys/time.h> 38239281Sgonzo#include <sys/bus.h> 39239281Sgonzo#include <sys/resource.h> 40239281Sgonzo#include <sys/rman.h> 41239281Sgonzo 42239281Sgonzo#include <dev/iicbus/iicbus.h> 43239281Sgonzo#include <dev/iicbus/iiconf.h> 44239281Sgonzo 45239281Sgonzo#include <dev/ofw/openfirm.h> 46239281Sgonzo#include <dev/ofw/ofw_bus.h> 47239281Sgonzo#include <dev/ofw/ofw_bus_subr.h> 48239281Sgonzo 49239281Sgonzo#include "iicbus_if.h" 50239281Sgonzo 51239281Sgonzo#define TPS65217A 0x7 52239281Sgonzo#define TPS65217B 0xF 53253025Sgonzo#define TPS65217C 0xE 54253025Sgonzo#define TPS65217D 0x6 55239281Sgonzo 56239281Sgonzo/* TPS65217 Reisters */ 57239281Sgonzo#define TPS65217_CHIPID_REG 0x00 58239281Sgonzo#define TPS65217_STATUS_REG 0x0A 59239281Sgonzo 60239281Sgonzo#define MAX_IIC_DATA_SIZE 2 61239281Sgonzo 62239281Sgonzo 63239281Sgonzostruct am335x_pmic_softc { 64239281Sgonzo device_t sc_dev; 65239281Sgonzo uint32_t sc_addr; 66239281Sgonzo struct intr_config_hook enum_hook; 67239281Sgonzo}; 68239281Sgonzo 69239281Sgonzostatic int 70239281Sgonzoam335x_pmic_read(device_t dev, uint8_t addr, uint8_t *data, uint8_t size) 71239281Sgonzo{ 72239281Sgonzo struct am335x_pmic_softc *sc = device_get_softc(dev); 73239281Sgonzo struct iic_msg msg[] = { 74239281Sgonzo { sc->sc_addr, IIC_M_WR, 1, &addr }, 75239281Sgonzo { sc->sc_addr, IIC_M_RD, size, data }, 76239281Sgonzo }; 77239281Sgonzo return (iicbus_transfer(dev, msg, 2)); 78239281Sgonzo} 79239281Sgonzo 80239281Sgonzo#ifdef notyet 81239281Sgonzostatic int 82239281Sgonzoam335x_pmic_write(device_t dev, uint8_t address, uint8_t *data, uint8_t size) 83239281Sgonzo{ 84239281Sgonzo uint8_t buffer[MAX_IIC_DATA_SIZE + 1]; 85239281Sgonzo struct am335x_pmic_softc *sc = device_get_softc(dev); 86239281Sgonzo struct iic_msg msg[] = { 87239281Sgonzo { sc->sc_addr, IIC_M_WR, size + 1, buffer }, 88239281Sgonzo }; 89239281Sgonzo 90239281Sgonzo if (size > MAX_IIC_DATA_SIZE) 91239281Sgonzo return (ENOMEM); 92239281Sgonzo 93239281Sgonzo buffer[0] = address; 94239281Sgonzo memcpy(buffer + 1, data, size); 95239281Sgonzo 96239281Sgonzo return (iicbus_transfer(dev, msg, 1)); 97239281Sgonzo} 98239281Sgonzo#endif 99239281Sgonzo 100239281Sgonzostatic int 101239281Sgonzoam335x_pmic_probe(device_t dev) 102239281Sgonzo{ 103239281Sgonzo struct am335x_pmic_softc *sc; 104239281Sgonzo 105239281Sgonzo if (!ofw_bus_is_compatible(dev, "ti,am335x-pmic")) 106239281Sgonzo return (ENXIO); 107239281Sgonzo 108239281Sgonzo sc = device_get_softc(dev); 109239281Sgonzo sc->sc_dev = dev; 110239281Sgonzo sc->sc_addr = iicbus_get_addr(dev); 111239281Sgonzo 112239281Sgonzo device_set_desc(dev, "TI TPS65217 Power Management IC"); 113239281Sgonzo 114239281Sgonzo return (0); 115239281Sgonzo} 116239281Sgonzo 117239281Sgonzostatic void 118239281Sgonzoam335x_pmic_start(void *xdev) 119239281Sgonzo{ 120239281Sgonzo struct am335x_pmic_softc *sc; 121239281Sgonzo device_t dev = (device_t)xdev; 122239281Sgonzo uint8_t reg; 123239281Sgonzo char name[20]; 124239281Sgonzo char pwr[4][11] = {"Unknown", "USB", "AC", "USB and AC"}; 125239281Sgonzo 126239281Sgonzo sc = device_get_softc(dev); 127239281Sgonzo 128239281Sgonzo am335x_pmic_read(dev, TPS65217_CHIPID_REG, ®, 1); 129239281Sgonzo switch (reg>>4) { 130239281Sgonzo case TPS65217A: 131239281Sgonzo sprintf(name, "TPS65217A ver 1.%u", reg & 0xF); 132239281Sgonzo break; 133239281Sgonzo case TPS65217B: 134239281Sgonzo sprintf(name, "TPS65217B ver 1.%u", reg & 0xF); 135239281Sgonzo break; 136253025Sgonzo case TPS65217C: 137253025Sgonzo sprintf(name, "TPS65217C ver 1.%u", reg & 0xF); 138253025Sgonzo break; 139253025Sgonzo case TPS65217D: 140253025Sgonzo sprintf(name, "TPS65217D ver 1.%u", reg & 0xF); 141253025Sgonzo break; 142239281Sgonzo default: 143239281Sgonzo sprintf(name, "Unknown PMIC"); 144239281Sgonzo } 145239281Sgonzo 146239281Sgonzo am335x_pmic_read(dev, TPS65217_STATUS_REG, ®, 1); 147239281Sgonzo device_printf(dev, "%s powered by %s\n", name, pwr[(reg>>2)&0x03]); 148239281Sgonzo 149239281Sgonzo config_intrhook_disestablish(&sc->enum_hook); 150239281Sgonzo} 151239281Sgonzo 152239281Sgonzostatic int 153239281Sgonzoam335x_pmic_attach(device_t dev) 154239281Sgonzo{ 155239281Sgonzo struct am335x_pmic_softc *sc; 156239281Sgonzo 157239281Sgonzo sc = device_get_softc(dev); 158239281Sgonzo 159239281Sgonzo sc->enum_hook.ich_func = am335x_pmic_start; 160239281Sgonzo sc->enum_hook.ich_arg = dev; 161239281Sgonzo 162239281Sgonzo if (config_intrhook_establish(&sc->enum_hook) != 0) 163239281Sgonzo return (ENOMEM); 164239281Sgonzo 165239281Sgonzo return (0); 166239281Sgonzo} 167239281Sgonzo 168239281Sgonzostatic device_method_t am335x_pmic_methods[] = { 169239281Sgonzo DEVMETHOD(device_probe, am335x_pmic_probe), 170239281Sgonzo DEVMETHOD(device_attach, am335x_pmic_attach), 171239281Sgonzo {0, 0}, 172239281Sgonzo}; 173239281Sgonzo 174239281Sgonzostatic driver_t am335x_pmic_driver = { 175239281Sgonzo "am335x_pmic", 176239281Sgonzo am335x_pmic_methods, 177239281Sgonzo sizeof(struct am335x_pmic_softc), 178239281Sgonzo}; 179239281Sgonzo 180239281Sgonzostatic devclass_t am335x_pmic_devclass; 181239281Sgonzo 182239281SgonzoDRIVER_MODULE(am335x_pmic, iicbus, am335x_pmic_driver, am335x_pmic_devclass, 0, 0); 183239281SgonzoMODULE_VERSION(am335x_pmic, 1); 184239281SgonzoMODULE_DEPEND(am335x_pmic, iicbus, 1, 1, 1); 185