185 lines
4.7 KiB
C
185 lines
4.7 KiB
C
/*-
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* Copyright (c) 2012 Damjan Marion <dmarion@Freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* TPS65217 PMIC companion chip for AM335x SoC sitting on I2C bus
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/clock.h>
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#include <sys/time.h>
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#include <sys/bus.h>
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#include <sys/resource.h>
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#include <sys/rman.h>
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#include <dev/iicbus/iicbus.h>
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#include <dev/iicbus/iiconf.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include "iicbus_if.h"
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#define TPS65217A 0x7
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#define TPS65217B 0xF
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#define TPS65217C 0xE
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#define TPS65217D 0x6
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/* TPS65217 Reisters */
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#define TPS65217_CHIPID_REG 0x00
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#define TPS65217_STATUS_REG 0x0A
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#define MAX_IIC_DATA_SIZE 2
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struct am335x_pmic_softc {
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device_t sc_dev;
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uint32_t sc_addr;
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struct intr_config_hook enum_hook;
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};
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static int
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am335x_pmic_read(device_t dev, uint8_t addr, uint8_t *data, uint8_t size)
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{
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struct am335x_pmic_softc *sc = device_get_softc(dev);
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struct iic_msg msg[] = {
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{ sc->sc_addr, IIC_M_WR, 1, &addr },
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{ sc->sc_addr, IIC_M_RD, size, data },
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};
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return (iicbus_transfer(dev, msg, 2));
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}
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#ifdef notyet
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static int
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am335x_pmic_write(device_t dev, uint8_t address, uint8_t *data, uint8_t size)
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{
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uint8_t buffer[MAX_IIC_DATA_SIZE + 1];
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struct am335x_pmic_softc *sc = device_get_softc(dev);
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struct iic_msg msg[] = {
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{ sc->sc_addr, IIC_M_WR, size + 1, buffer },
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};
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if (size > MAX_IIC_DATA_SIZE)
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return (ENOMEM);
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buffer[0] = address;
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memcpy(buffer + 1, data, size);
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return (iicbus_transfer(dev, msg, 1));
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}
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#endif
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static int
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am335x_pmic_probe(device_t dev)
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{
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struct am335x_pmic_softc *sc;
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if (!ofw_bus_is_compatible(dev, "ti,am335x-pmic"))
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return (ENXIO);
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sc = device_get_softc(dev);
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sc->sc_dev = dev;
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sc->sc_addr = iicbus_get_addr(dev);
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device_set_desc(dev, "TI TPS65217 Power Management IC");
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return (0);
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}
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static void
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am335x_pmic_start(void *xdev)
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{
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struct am335x_pmic_softc *sc;
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device_t dev = (device_t)xdev;
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uint8_t reg;
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char name[20];
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char pwr[4][11] = {"Unknown", "USB", "AC", "USB and AC"};
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sc = device_get_softc(dev);
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am335x_pmic_read(dev, TPS65217_CHIPID_REG, ®, 1);
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switch (reg>>4) {
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case TPS65217A:
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sprintf(name, "TPS65217A ver 1.%u", reg & 0xF);
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break;
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case TPS65217B:
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sprintf(name, "TPS65217B ver 1.%u", reg & 0xF);
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break;
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case TPS65217C:
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sprintf(name, "TPS65217C ver 1.%u", reg & 0xF);
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break;
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case TPS65217D:
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sprintf(name, "TPS65217D ver 1.%u", reg & 0xF);
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break;
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default:
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sprintf(name, "Unknown PMIC");
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}
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am335x_pmic_read(dev, TPS65217_STATUS_REG, ®, 1);
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device_printf(dev, "%s powered by %s\n", name, pwr[(reg>>2)&0x03]);
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config_intrhook_disestablish(&sc->enum_hook);
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}
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static int
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am335x_pmic_attach(device_t dev)
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{
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struct am335x_pmic_softc *sc;
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sc = device_get_softc(dev);
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sc->enum_hook.ich_func = am335x_pmic_start;
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sc->enum_hook.ich_arg = dev;
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if (config_intrhook_establish(&sc->enum_hook) != 0)
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return (ENOMEM);
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return (0);
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}
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static device_method_t am335x_pmic_methods[] = {
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DEVMETHOD(device_probe, am335x_pmic_probe),
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DEVMETHOD(device_attach, am335x_pmic_attach),
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{0, 0},
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};
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static driver_t am335x_pmic_driver = {
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"am335x_pmic",
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am335x_pmic_methods,
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sizeof(struct am335x_pmic_softc),
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};
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static devclass_t am335x_pmic_devclass;
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DRIVER_MODULE(am335x_pmic, iicbus, am335x_pmic_driver, am335x_pmic_devclass, 0, 0);
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MODULE_VERSION(am335x_pmic, 1);
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MODULE_DEPEND(am335x_pmic, iicbus, 1, 1, 1);
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