/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2012 Damjan Marion * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include /* * TI TPS65217 PMIC companion chip for AM335x SoC sitting on I2C bus */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "iicbus_if.h" struct am335x_pmic_softc { device_t sc_dev; uint32_t sc_addr; struct resource *sc_irq_res; void *sc_intrhand; }; static const char *tps65217_voreg_c[4] = {"4.10V", "4.15V", "4.20V", "4.25V"}; static int am335x_pmic_bootverbose = 0; TUNABLE_INT("hw.am335x_pmic.bootverbose", &am335x_pmic_bootverbose); static char am335x_pmic_vo[6]; TUNABLE_STR("hw.am335x_pmic.vo", am335x_pmic_vo, sizeof(am335x_pmic_vo)); static void am335x_pmic_shutdown(void *, int); static int am335x_pmic_read(device_t dev, uint8_t addr, uint8_t *data, uint8_t size) { return (iicdev_readfrom(dev, addr, data, size, IIC_INTRWAIT)); } static int am335x_pmic_write(device_t dev, uint8_t address, uint8_t *data, uint8_t size) { return (iicdev_writeto(dev, address, data, size, IIC_INTRWAIT)); } static void am335x_pmic_intr(void *arg) { struct am335x_pmic_softc *sc = (struct am335x_pmic_softc *)arg; struct tps65217_status_reg status_reg; struct tps65217_int_reg int_reg; int rv; char notify_buf[16]; THREAD_SLEEPING_OK(); rv = am335x_pmic_read(sc->sc_dev, TPS65217_INT_REG, (uint8_t *)&int_reg, 1); if (rv != 0) { device_printf(sc->sc_dev, "Cannot read interrupt register\n"); THREAD_NO_SLEEPING(); return; } rv = am335x_pmic_read(sc->sc_dev, TPS65217_STATUS_REG, (uint8_t *)&status_reg, 1); if (rv != 0) { device_printf(sc->sc_dev, "Cannot read status register\n"); THREAD_NO_SLEEPING(); return; } THREAD_NO_SLEEPING(); if (int_reg.pbi && status_reg.pb) shutdown_nice(RB_POWEROFF); if (int_reg.aci) { snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", status_reg.acpwr); devctl_notify("ACPI", "ACAD", "power", notify_buf); } } static int am335x_pmic_probe(device_t dev) { struct am335x_pmic_softc *sc; if (!ofw_bus_is_compatible(dev, "ti,tps65217")) return (ENXIO); sc = device_get_softc(dev); sc->sc_dev = dev; /* Convert to 8-bit addressing */ sc->sc_addr = iicbus_get_addr(dev); device_set_desc(dev, "TI TPS65217 Power Management IC"); return (0); } static void am335x_pmic_dump_chgconfig(device_t dev) { struct tps65217_chgconfig0_reg reg0; struct tps65217_chgconfig1_reg reg1; struct tps65217_chgconfig2_reg reg2; struct tps65217_chgconfig3_reg reg3; const char *e_d[] = {"enabled", "disabled"}; const char *d_e[] = {"disabled", "enabled"}; const char *i_a[] = {"inactive", "active"}; const char *f_t[] = {"false", "true"}; const char *timer_c[] = {"4h", "5h", "6h", "8h"}; const char *ntc_type_c[] = {"100k", "10k"}; const char *vprechg_c[] = {"2.9V", "2.5V"}; const char *trange_c[] = {"0-45 C", "0-60 C"}; const char *termif_c[] = {"2.5%", "7.5%", "15%", "18%"}; const char *pchrgt_c[] = {"30 min", "60 min"}; const char *dppmth_c[] = {"3.50V", "3.75V", "4.00V", "4.25V"}; const char *ichrg_c[] = {"300mA", "400mA", "500mA", "700mA"}; am335x_pmic_read(dev, TPS65217_CHGCONFIG0_REG, (uint8_t *)®0, 1); device_printf(dev, " BAT TEMP/NTC ERROR: %s\n", f_t[reg0.battemp]); device_printf(dev, " Pre-charge timer time-out: %s\n", f_t[reg0.pchgtout]); device_printf(dev, " Charge timer time-out: %s\n", f_t[reg0.chgtout]); device_printf(dev, " Charger active: %s\n", f_t[reg0.active]); device_printf(dev, " Termination current detected: %s\n", f_t[reg0.termi]); device_printf(dev, " Thermal suspend: %s\n", f_t[reg0.tsusp]); device_printf(dev, " DPPM active: %s\n", f_t[reg0.dppm]); device_printf(dev, " Thermal regulation: %s\n", i_a[reg0.treg]); am335x_pmic_read(dev, TPS65217_CHGCONFIG1_REG, (uint8_t *)®1, 1); device_printf(dev, " Charger: %s\n", d_e[reg1.chg_en]); device_printf(dev, " Suspend charge: %s\n", i_a[reg1.susp]); device_printf(dev, " Charge termination: %s\n", e_d[reg1.term]); device_printf(dev, " Charger reset: %s\n", i_a[reg1.reset]); device_printf(dev, " NTC TYPE: %s\n", ntc_type_c[reg1.ntc_type]); device_printf(dev, " Safety timer: %s\n", d_e[reg1.tmr_en]); device_printf(dev, " Charge safety timer: %s\n", timer_c[reg1.timer]); am335x_pmic_read(dev, TPS65217_CHGCONFIG2_REG, (uint8_t *)®2, 1); device_printf(dev, " Charge voltage: %s\n", tps65217_voreg_c[reg2.voreg]); device_printf(dev, " Pre-charge to fast charge transition voltage: %s\n", vprechg_c[reg2.vprechg]); device_printf(dev, " Dynamic timer function: %s\n", d_e[reg2.dyntmr]); am335x_pmic_read(dev, TPS65217_CHGCONFIG3_REG, (uint8_t *)®3, 1); device_printf(dev, " Temperature range for charging: %s\n", trange_c[reg3.trange]); device_printf(dev, " Termination current factor: %s\n", termif_c[reg3.termif]); device_printf(dev, " Pre-charge time: %s\n", pchrgt_c[reg3.pchrgt]); device_printf(dev, " Power path DPPM threshold: %s\n", dppmth_c[reg3.dppmth]); device_printf(dev, " Charge current: %s\n", ichrg_c[reg3.ichrg]); } static void am335x_pmic_setvo(device_t dev, uint8_t vo) { struct tps65217_chgconfig2_reg reg2; am335x_pmic_read(dev, TPS65217_CHGCONFIG2_REG, (uint8_t *)®2, 1); reg2.voreg = vo; am335x_pmic_write(dev, TPS65217_CHGCONFIG2_REG, (uint8_t *)®2, 1); } static void am335x_pmic_start(struct am335x_pmic_softc *sc) { device_t dev; struct tps65217_status_reg status_reg; struct tps65217_chipid_reg chipid_reg; uint8_t reg, vo; char name[20]; char pwr[4][11] = {"Battery", "USB", "AC", "USB and AC"}; int rv; phandle_t node; dev = sc->sc_dev; am335x_pmic_read(dev, TPS65217_CHIPID_REG, (uint8_t *)&chipid_reg, 1); switch (chipid_reg.chip) { case TPS65217A: sprintf(name, "TPS65217A ver 1.%u", chipid_reg.rev); break; case TPS65217B: sprintf(name, "TPS65217B ver 1.%u", chipid_reg.rev); break; case TPS65217C: sprintf(name, "TPS65217C ver 1.%u", chipid_reg.rev); break; case TPS65217D: sprintf(name, "TPS65217D ver 1.%u", chipid_reg.rev); break; default: sprintf(name, "Unknown PMIC"); } am335x_pmic_read(dev, TPS65217_STATUS_REG, (uint8_t *)&status_reg, 1); device_printf(dev, "%s powered by %s\n", name, pwr[status_reg.usbpwr | (status_reg.acpwr << 1)]); /* Check devicetree for ti,pmic-shutdown-controller * if present; PMIC will go to shutdown state on PWR_EN toggle * if not present; PMIC will enter sleep state on PWR_EN toggle (default on reset) */ node = ofw_bus_get_node(dev); if (OF_hasprop(node, "ti,pmic-shutdown-controller")) { status_reg.off = 1; am335x_pmic_write(dev, TPS65217_STATUS_REG, (uint8_t *)&status_reg, 1); } if (am335x_pmic_vo[0] != '\0') { for (vo = 0; vo < 4; vo++) { if (strcmp(tps65217_voreg_c[vo], am335x_pmic_vo) == 0) break; } if (vo == 4) { device_printf(dev, "WARNING: hw.am335x_pmic.vo=\"%s\"" ": unsupported value\n", am335x_pmic_vo); } else { am335x_pmic_setvo(dev, vo); } } if (bootverbose || am335x_pmic_bootverbose) { am335x_pmic_dump_chgconfig(dev); } EVENTHANDLER_REGISTER(shutdown_final, am335x_pmic_shutdown, dev, SHUTDOWN_PRI_LAST); /* Unmask all interrupts and clear pending status */ reg = 0; am335x_pmic_write(dev, TPS65217_INT_REG, ®, 1); am335x_pmic_read(dev, TPS65217_INT_REG, ®, 1); if (sc->sc_irq_res != NULL) { rv = bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_MISC | INTR_MPSAFE, NULL, am335x_pmic_intr, sc, &sc->sc_intrhand); if (rv != 0) device_printf(dev, "Unable to setup the irq handler.\n"); } } static int am335x_pmic_attach(device_t dev) { struct am335x_pmic_softc *sc; int rid; sc = device_get_softc(dev); rid = 0; sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE); if (!sc->sc_irq_res) { device_printf(dev, "cannot allocate interrupt\n"); /* return (ENXIO); */ } am335x_pmic_start(sc); return (0); } static void am335x_pmic_shutdown(void *xdev, int howto) { if (!(howto & RB_POWEROFF)) return; /* Toggle pmic_pwr_enable to shutdown the PMIC. */ am335x_rtc_pmic_pwr_toggle(); } static device_method_t am335x_pmic_methods[] = { DEVMETHOD(device_probe, am335x_pmic_probe), DEVMETHOD(device_attach, am335x_pmic_attach), {0, 0}, }; static driver_t am335x_pmic_driver = { "am335x_pmic", am335x_pmic_methods, sizeof(struct am335x_pmic_softc), }; static devclass_t am335x_pmic_devclass; DRIVER_MODULE(am335x_pmic, iicbus, am335x_pmic_driver, am335x_pmic_devclass, 0, 0); MODULE_VERSION(am335x_pmic, 1); MODULE_DEPEND(am335x_pmic, iicbus, 1, 1, 1);