352 lines
11 KiB
C
352 lines
11 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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* TI 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/eventhandler.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/proc.h>
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#include <sys/reboot.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 <arm/ti/am335x/am335x_rtcvar.h>
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#include <arm/ti/am335x/tps65217x.h>
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#include "iicbus_if.h"
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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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struct resource *sc_irq_res;
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void *sc_intrhand;
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};
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static const char *tps65217_voreg_c[4] = {"4.10V", "4.15V", "4.20V", "4.25V"};
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static int am335x_pmic_bootverbose = 0;
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TUNABLE_INT("hw.am335x_pmic.bootverbose", &am335x_pmic_bootverbose);
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static char am335x_pmic_vo[6];
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TUNABLE_STR("hw.am335x_pmic.vo", am335x_pmic_vo, sizeof(am335x_pmic_vo));
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static void am335x_pmic_shutdown(void *, int);
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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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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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static void
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am335x_pmic_intr(void *arg)
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{
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struct am335x_pmic_softc *sc = (struct am335x_pmic_softc *)arg;
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struct tps65217_status_reg status_reg;
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struct tps65217_int_reg int_reg;
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int rv;
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char notify_buf[16];
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THREAD_SLEEPING_OK();
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rv = am335x_pmic_read(sc->sc_dev, TPS65217_INT_REG, (uint8_t *)&int_reg, 1);
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if (rv != 0) {
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device_printf(sc->sc_dev, "Cannot read interrupt register\n");
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THREAD_NO_SLEEPING();
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return;
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}
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rv = am335x_pmic_read(sc->sc_dev, TPS65217_STATUS_REG, (uint8_t *)&status_reg, 1);
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if (rv != 0) {
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device_printf(sc->sc_dev, "Cannot read status register\n");
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THREAD_NO_SLEEPING();
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return;
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}
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THREAD_NO_SLEEPING();
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if (int_reg.pbi && status_reg.pb)
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shutdown_nice(RB_POWEROFF);
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if (int_reg.aci) {
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snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x",
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status_reg.acpwr);
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devctl_notify_f("ACPI", "ACAD", "power", notify_buf, M_NOWAIT);
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}
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}
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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,tps65217"))
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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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/* Convert to 8-bit addressing */
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sc->sc_addr = iicbus_get_addr(dev) << 1;
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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_dump_chgconfig(device_t dev)
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{
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struct tps65217_chgconfig0_reg reg0;
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struct tps65217_chgconfig1_reg reg1;
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struct tps65217_chgconfig2_reg reg2;
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struct tps65217_chgconfig3_reg reg3;
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const char *e_d[] = {"enabled", "disabled"};
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const char *d_e[] = {"disabled", "enabled"};
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const char *i_a[] = {"inactive", "active"};
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const char *f_t[] = {"false", "true"};
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const char *timer_c[] = {"4h", "5h", "6h", "8h"};
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const char *ntc_type_c[] = {"100k", "10k"};
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const char *vprechg_c[] = {"2.9V", "2.5V"};
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const char *trange_c[] = {"0-45 C", "0-60 C"};
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const char *termif_c[] = {"2.5%", "7.5%", "15%", "18%"};
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const char *pchrgt_c[] = {"30 min", "60 min"};
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const char *dppmth_c[] = {"3.50V", "3.75V", "4.00V", "4.25V"};
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const char *ichrg_c[] = {"300mA", "400mA", "500mA", "700mA"};
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am335x_pmic_read(dev, TPS65217_CHGCONFIG0_REG, (uint8_t *)®0, 1);
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device_printf(dev, " BAT TEMP/NTC ERROR: %s\n", f_t[reg0.battemp]);
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device_printf(dev, " Pre-charge timer time-out: %s\n", f_t[reg0.pchgtout]);
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device_printf(dev, " Charge timer time-out: %s\n", f_t[reg0.chgtout]);
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device_printf(dev, " Charger active: %s\n", f_t[reg0.active]);
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device_printf(dev, " Termination current detected: %s\n", f_t[reg0.termi]);
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device_printf(dev, " Thermal suspend: %s\n", f_t[reg0.tsusp]);
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device_printf(dev, " DPPM active: %s\n", f_t[reg0.dppm]);
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device_printf(dev, " Thermal regulation: %s\n", i_a[reg0.treg]);
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am335x_pmic_read(dev, TPS65217_CHGCONFIG1_REG, (uint8_t *)®1, 1);
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device_printf(dev, " Charger: %s\n", d_e[reg1.chg_en]);
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device_printf(dev, " Suspend charge: %s\n", i_a[reg1.susp]);
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device_printf(dev, " Charge termination: %s\n", e_d[reg1.term]);
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device_printf(dev, " Charger reset: %s\n", i_a[reg1.reset]);
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device_printf(dev, " NTC TYPE: %s\n", ntc_type_c[reg1.ntc_type]);
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device_printf(dev, " Safety timer: %s\n", d_e[reg1.tmr_en]);
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device_printf(dev, " Charge safety timer: %s\n", timer_c[reg1.timer]);
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am335x_pmic_read(dev, TPS65217_CHGCONFIG2_REG, (uint8_t *)®2, 1);
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device_printf(dev, " Charge voltage: %s\n", tps65217_voreg_c[reg2.voreg]);
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device_printf(dev, " Pre-charge to fast charge transition voltage: %s\n",
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vprechg_c[reg2.vprechg]);
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device_printf(dev, " Dynamic timer function: %s\n", d_e[reg2.dyntmr]);
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am335x_pmic_read(dev, TPS65217_CHGCONFIG3_REG, (uint8_t *)®3, 1);
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device_printf(dev, " Temperature range for charging: %s\n", trange_c[reg3.trange]);
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device_printf(dev, " Termination current factor: %s\n", termif_c[reg3.termif]);
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device_printf(dev, " Pre-charge time: %s\n", pchrgt_c[reg3.pchrgt]);
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device_printf(dev, " Power path DPPM threshold: %s\n", dppmth_c[reg3.dppmth]);
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device_printf(dev, " Charge current: %s\n", ichrg_c[reg3.ichrg]);
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}
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static void
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am335x_pmic_setvo(device_t dev, uint8_t vo)
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{
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struct tps65217_chgconfig2_reg reg2;
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am335x_pmic_read(dev, TPS65217_CHGCONFIG2_REG, (uint8_t *)®2, 1);
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reg2.voreg = vo;
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am335x_pmic_write(dev, TPS65217_CHGCONFIG2_REG, (uint8_t *)®2, 1);
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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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struct tps65217_status_reg status_reg;
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struct tps65217_chipid_reg chipid_reg;
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uint8_t reg, vo;
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char name[20];
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char pwr[4][11] = {"Battery", "USB", "AC", "USB and AC"};
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int rv;
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sc = device_get_softc(dev);
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am335x_pmic_read(dev, TPS65217_CHIPID_REG, (uint8_t *)&chipid_reg, 1);
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switch (chipid_reg.chip) {
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case TPS65217A:
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sprintf(name, "TPS65217A ver 1.%u", chipid_reg.rev);
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break;
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case TPS65217B:
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sprintf(name, "TPS65217B ver 1.%u", chipid_reg.rev);
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break;
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case TPS65217C:
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sprintf(name, "TPS65217C ver 1.%u", chipid_reg.rev);
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break;
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case TPS65217D:
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sprintf(name, "TPS65217D ver 1.%u", chipid_reg.rev);
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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, (uint8_t *)&status_reg, 1);
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device_printf(dev, "%s powered by %s\n", name,
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pwr[status_reg.usbpwr | (status_reg.acpwr << 1)]);
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if (am335x_pmic_vo[0] != '\0') {
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for (vo = 0; vo < 4; vo++) {
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if (strcmp(tps65217_voreg_c[vo], am335x_pmic_vo) == 0)
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break;
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}
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if (vo == 4) {
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device_printf(dev, "WARNING: hw.am335x_pmic.vo=\"%s\""
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": unsupported value\n", am335x_pmic_vo);
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} else {
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am335x_pmic_setvo(dev, vo);
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}
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}
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if (bootverbose || am335x_pmic_bootverbose) {
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am335x_pmic_dump_chgconfig(dev);
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}
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EVENTHANDLER_REGISTER(shutdown_final, am335x_pmic_shutdown, dev,
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SHUTDOWN_PRI_LAST);
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config_intrhook_disestablish(&sc->enum_hook);
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/* Unmask all interrupts and clear pending status */
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reg = 0;
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am335x_pmic_write(dev, TPS65217_INT_REG, ®, 1);
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am335x_pmic_read(dev, TPS65217_INT_REG, ®, 1);
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if (sc->sc_irq_res != NULL) {
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rv = bus_setup_intr(dev, sc->sc_irq_res,
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INTR_TYPE_MISC | INTR_MPSAFE, NULL, am335x_pmic_intr,
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sc, &sc->sc_intrhand);
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if (rv != 0)
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device_printf(dev,
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"Unable to setup the irq handler.\n");
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}
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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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int rid;
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sc = device_get_softc(dev);
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rid = 0;
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sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
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RF_ACTIVE);
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if (!sc->sc_irq_res) {
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device_printf(dev, "cannot allocate interrupt\n");
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/* return (ENXIO); */
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}
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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 void
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am335x_pmic_shutdown(void *xdev, int howto)
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{
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device_t dev;
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struct tps65217_status_reg reg;
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if (!(howto & RB_POWEROFF))
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return;
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dev = (device_t)xdev;
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am335x_pmic_read(dev, TPS65217_STATUS_REG, (uint8_t *)®, 1);
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/* Set the OFF bit on status register to start the shutdown sequence. */
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reg.off = 1;
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am335x_pmic_write(dev, TPS65217_STATUS_REG, (uint8_t *)®, 1);
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/* Toggle pmic_pwr_enable to shutdown the PMIC. */
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am335x_rtc_pmic_pwr_toggle();
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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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