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> 34278079Sloos#include <sys/eventhandler.h> 35239281Sgonzo#include <sys/kernel.h> 36239281Sgonzo#include <sys/module.h> 37239281Sgonzo#include <sys/clock.h> 38239281Sgonzo#include <sys/time.h> 39239281Sgonzo#include <sys/bus.h> 40278079Sloos#include <sys/reboot.h> 41239281Sgonzo#include <sys/resource.h> 42239281Sgonzo#include <sys/rman.h> 43239281Sgonzo 44239281Sgonzo#include <dev/iicbus/iicbus.h> 45239281Sgonzo#include <dev/iicbus/iiconf.h> 46239281Sgonzo 47239281Sgonzo#include <dev/ofw/openfirm.h> 48239281Sgonzo#include <dev/ofw/ofw_bus.h> 49239281Sgonzo#include <dev/ofw/ofw_bus_subr.h> 50239281Sgonzo 51278079Sloos#include <arm/ti/am335x/am335x_rtcvar.h> 52278079Sloos 53239281Sgonzo#include "iicbus_if.h" 54239281Sgonzo 55239281Sgonzo#define TPS65217A 0x7 56239281Sgonzo#define TPS65217B 0xF 57253025Sgonzo#define TPS65217C 0xE 58253025Sgonzo#define TPS65217D 0x6 59239281Sgonzo 60239281Sgonzo/* TPS65217 Reisters */ 61239281Sgonzo#define TPS65217_CHIPID_REG 0x00 62239281Sgonzo#define TPS65217_STATUS_REG 0x0A 63278079Sloos#define TPS65217_STATUS_OFF (1U << 7) 64278079Sloos#define TPS65217_STATUS_ACPWR (1U << 3) 65278079Sloos#define TPS65217_STATUS_USBPWR (1U << 2) 66278079Sloos#define TPS65217_STATUS_BT (1U << 0) 67239281Sgonzo 68239281Sgonzo#define MAX_IIC_DATA_SIZE 2 69239281Sgonzo 70239281Sgonzo 71239281Sgonzostruct am335x_pmic_softc { 72239281Sgonzo device_t sc_dev; 73239281Sgonzo uint32_t sc_addr; 74239281Sgonzo struct intr_config_hook enum_hook; 75239281Sgonzo}; 76239281Sgonzo 77278079Sloosstatic void am335x_pmic_shutdown(void *, int); 78278079Sloos 79239281Sgonzostatic int 80239281Sgonzoam335x_pmic_read(device_t dev, uint8_t addr, uint8_t *data, uint8_t size) 81239281Sgonzo{ 82239281Sgonzo struct am335x_pmic_softc *sc = device_get_softc(dev); 83239281Sgonzo struct iic_msg msg[] = { 84239281Sgonzo { sc->sc_addr, IIC_M_WR, 1, &addr }, 85239281Sgonzo { sc->sc_addr, IIC_M_RD, size, data }, 86239281Sgonzo }; 87239281Sgonzo return (iicbus_transfer(dev, msg, 2)); 88239281Sgonzo} 89239281Sgonzo 90239281Sgonzostatic int 91239281Sgonzoam335x_pmic_write(device_t dev, uint8_t address, uint8_t *data, uint8_t size) 92239281Sgonzo{ 93239281Sgonzo uint8_t buffer[MAX_IIC_DATA_SIZE + 1]; 94239281Sgonzo struct am335x_pmic_softc *sc = device_get_softc(dev); 95239281Sgonzo struct iic_msg msg[] = { 96239281Sgonzo { sc->sc_addr, IIC_M_WR, size + 1, buffer }, 97239281Sgonzo }; 98239281Sgonzo 99239281Sgonzo if (size > MAX_IIC_DATA_SIZE) 100239281Sgonzo return (ENOMEM); 101239281Sgonzo 102239281Sgonzo buffer[0] = address; 103239281Sgonzo memcpy(buffer + 1, data, size); 104239281Sgonzo 105239281Sgonzo return (iicbus_transfer(dev, msg, 1)); 106239281Sgonzo} 107239281Sgonzo 108239281Sgonzostatic int 109239281Sgonzoam335x_pmic_probe(device_t dev) 110239281Sgonzo{ 111239281Sgonzo struct am335x_pmic_softc *sc; 112239281Sgonzo 113239281Sgonzo if (!ofw_bus_is_compatible(dev, "ti,am335x-pmic")) 114239281Sgonzo return (ENXIO); 115239281Sgonzo 116239281Sgonzo sc = device_get_softc(dev); 117239281Sgonzo sc->sc_dev = dev; 118239281Sgonzo sc->sc_addr = iicbus_get_addr(dev); 119239281Sgonzo 120239281Sgonzo device_set_desc(dev, "TI TPS65217 Power Management IC"); 121239281Sgonzo 122239281Sgonzo return (0); 123239281Sgonzo} 124239281Sgonzo 125239281Sgonzostatic void 126239281Sgonzoam335x_pmic_start(void *xdev) 127239281Sgonzo{ 128239281Sgonzo struct am335x_pmic_softc *sc; 129239281Sgonzo device_t dev = (device_t)xdev; 130239281Sgonzo uint8_t reg; 131239281Sgonzo char name[20]; 132239281Sgonzo char pwr[4][11] = {"Unknown", "USB", "AC", "USB and AC"}; 133239281Sgonzo 134239281Sgonzo sc = device_get_softc(dev); 135239281Sgonzo 136239281Sgonzo am335x_pmic_read(dev, TPS65217_CHIPID_REG, ®, 1); 137239281Sgonzo switch (reg>>4) { 138239281Sgonzo case TPS65217A: 139239281Sgonzo sprintf(name, "TPS65217A ver 1.%u", reg & 0xF); 140239281Sgonzo break; 141239281Sgonzo case TPS65217B: 142239281Sgonzo sprintf(name, "TPS65217B ver 1.%u", reg & 0xF); 143239281Sgonzo break; 144253025Sgonzo case TPS65217C: 145253025Sgonzo sprintf(name, "TPS65217C ver 1.%u", reg & 0xF); 146253025Sgonzo break; 147253025Sgonzo case TPS65217D: 148253025Sgonzo sprintf(name, "TPS65217D ver 1.%u", reg & 0xF); 149253025Sgonzo break; 150239281Sgonzo default: 151239281Sgonzo sprintf(name, "Unknown PMIC"); 152239281Sgonzo } 153239281Sgonzo 154239281Sgonzo am335x_pmic_read(dev, TPS65217_STATUS_REG, ®, 1); 155239281Sgonzo device_printf(dev, "%s powered by %s\n", name, pwr[(reg>>2)&0x03]); 156239281Sgonzo 157278079Sloos EVENTHANDLER_REGISTER(shutdown_final, am335x_pmic_shutdown, dev, 158278079Sloos SHUTDOWN_PRI_LAST); 159278079Sloos 160239281Sgonzo config_intrhook_disestablish(&sc->enum_hook); 161239281Sgonzo} 162239281Sgonzo 163239281Sgonzostatic int 164239281Sgonzoam335x_pmic_attach(device_t dev) 165239281Sgonzo{ 166239281Sgonzo struct am335x_pmic_softc *sc; 167239281Sgonzo 168239281Sgonzo sc = device_get_softc(dev); 169239281Sgonzo 170239281Sgonzo sc->enum_hook.ich_func = am335x_pmic_start; 171239281Sgonzo sc->enum_hook.ich_arg = dev; 172239281Sgonzo 173239281Sgonzo if (config_intrhook_establish(&sc->enum_hook) != 0) 174239281Sgonzo return (ENOMEM); 175239281Sgonzo 176239281Sgonzo return (0); 177239281Sgonzo} 178239281Sgonzo 179278079Sloosstatic void 180278079Sloosam335x_pmic_shutdown(void *xdev, int howto) 181278079Sloos{ 182278079Sloos device_t dev; 183278079Sloos uint8_t reg; 184278079Sloos 185278079Sloos if (!(howto & RB_POWEROFF)) 186278079Sloos return; 187278079Sloos dev = (device_t)xdev; 188278079Sloos /* Set the OFF bit on status register to start the shutdown sequence. */ 189278079Sloos reg = TPS65217_STATUS_OFF; 190278079Sloos am335x_pmic_write(dev, TPS65217_STATUS_REG, ®, 1); 191278079Sloos /* Toggle pmic_pwr_enable to shutdown the PMIC. */ 192278079Sloos am335x_rtc_pmic_pwr_toggle(); 193278079Sloos} 194278079Sloos 195239281Sgonzostatic device_method_t am335x_pmic_methods[] = { 196239281Sgonzo DEVMETHOD(device_probe, am335x_pmic_probe), 197239281Sgonzo DEVMETHOD(device_attach, am335x_pmic_attach), 198239281Sgonzo {0, 0}, 199239281Sgonzo}; 200239281Sgonzo 201239281Sgonzostatic driver_t am335x_pmic_driver = { 202239281Sgonzo "am335x_pmic", 203239281Sgonzo am335x_pmic_methods, 204239281Sgonzo sizeof(struct am335x_pmic_softc), 205239281Sgonzo}; 206239281Sgonzo 207239281Sgonzostatic devclass_t am335x_pmic_devclass; 208239281Sgonzo 209239281SgonzoDRIVER_MODULE(am335x_pmic, iicbus, am335x_pmic_driver, am335x_pmic_devclass, 0, 0); 210239281SgonzoMODULE_VERSION(am335x_pmic, 1); 211239281SgonzoMODULE_DEPEND(am335x_pmic, iicbus, 1, 1, 1); 212