/*- * 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 __FBSDID("$FreeBSD$"); /* * 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 "iicbus_if.h" #define TPS65217A 0x7 #define TPS65217B 0xF #define TPS65217C 0xE #define TPS65217D 0x6 /* TPS65217 Reisters */ #define TPS65217_CHIPID_REG 0x00 #define TPS65217_INT_REG 0x02 #define TPS65217_INT_PBM (1U << 6) #define TPS65217_INT_ACM (1U << 5) #define TPS65217_INT_USBM (1U << 4) #define TPS65217_INT_PBI (1U << 2) #define TPS65217_INT_ACI (1U << 1) #define TPS65217_INT_USBI (1U << 0) #define TPS65217_STATUS_REG 0x0A #define TPS65217_STATUS_OFF (1U << 7) #define TPS65217_STATUS_ACPWR (1U << 3) #define TPS65217_STATUS_USBPWR (1U << 2) #define TPS65217_STATUS_BT (1U << 0) #define MAX_IIC_DATA_SIZE 2 struct am335x_pmic_softc { device_t sc_dev; uint32_t sc_addr; struct intr_config_hook enum_hook; struct resource *sc_irq_res; void *sc_intrhand; }; static void am335x_pmic_shutdown(void *, int); static int am335x_pmic_read(device_t dev, uint8_t addr, uint8_t *data, uint8_t size) { struct am335x_pmic_softc *sc = device_get_softc(dev); struct iic_msg msg[] = { { sc->sc_addr, IIC_M_WR, 1, &addr }, { sc->sc_addr, IIC_M_RD, size, data }, }; return (iicbus_transfer(dev, msg, 2)); } static int am335x_pmic_write(device_t dev, uint8_t address, uint8_t *data, uint8_t size) { uint8_t buffer[MAX_IIC_DATA_SIZE + 1]; struct am335x_pmic_softc *sc = device_get_softc(dev); struct iic_msg msg[] = { { sc->sc_addr, IIC_M_WR, size + 1, buffer }, }; if (size > MAX_IIC_DATA_SIZE) return (ENOMEM); buffer[0] = address; memcpy(buffer + 1, data, size); return (iicbus_transfer(dev, msg, 1)); } static void am335x_pmic_intr(void *arg) { struct am335x_pmic_softc *sc = (struct am335x_pmic_softc *)arg; uint8_t int_reg, status_reg; int rv; char notify_buf[16]; THREAD_SLEEPING_OK(); rv = am335x_pmic_read(sc->sc_dev, TPS65217_INT_REG, &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, &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 & TPS65217_INT_PBI) && (status_reg & TPS65217_STATUS_BT)) shutdown_nice(RB_POWEROFF); if (int_reg & TPS65217_INT_ACI) { snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", (status_reg & TPS65217_STATUS_ACPWR) ? 1 : 0); devctl_notify_f("ACPI", "ACAD", "power", notify_buf, M_NOWAIT); } } static int am335x_pmic_probe(device_t dev) { struct am335x_pmic_softc *sc; if (!ofw_bus_is_compatible(dev, "ti,am335x-pmic")) return (ENXIO); sc = device_get_softc(dev); sc->sc_dev = dev; sc->sc_addr = iicbus_get_addr(dev); device_set_desc(dev, "TI TPS65217 Power Management IC"); return (0); } static void am335x_pmic_start(void *xdev) { struct am335x_pmic_softc *sc; device_t dev = (device_t)xdev; uint8_t reg; char name[20]; char pwr[4][11] = {"Unknown", "USB", "AC", "USB and AC"}; int rv; sc = device_get_softc(dev); am335x_pmic_read(dev, TPS65217_CHIPID_REG, ®, 1); switch (reg>>4) { case TPS65217A: sprintf(name, "TPS65217A ver 1.%u", reg & 0xF); break; case TPS65217B: sprintf(name, "TPS65217B ver 1.%u", reg & 0xF); break; case TPS65217C: sprintf(name, "TPS65217C ver 1.%u", reg & 0xF); break; case TPS65217D: sprintf(name, "TPS65217D ver 1.%u", reg & 0xF); break; default: sprintf(name, "Unknown PMIC"); } am335x_pmic_read(dev, TPS65217_STATUS_REG, ®, 1); device_printf(dev, "%s powered by %s\n", name, pwr[(reg>>2)&0x03]); EVENTHANDLER_REGISTER(shutdown_final, am335x_pmic_shutdown, dev, SHUTDOWN_PRI_LAST); config_intrhook_disestablish(&sc->enum_hook); /* 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); */ } sc->enum_hook.ich_func = am335x_pmic_start; sc->enum_hook.ich_arg = dev; if (config_intrhook_establish(&sc->enum_hook) != 0) return (ENOMEM); return (0); } static void am335x_pmic_shutdown(void *xdev, int howto) { device_t dev; uint8_t reg; if (!(howto & RB_POWEROFF)) return; dev = (device_t)xdev; /* Set the OFF bit on status register to start the shutdown sequence. */ reg = TPS65217_STATUS_OFF; am335x_pmic_write(dev, TPS65217_STATUS_REG, ®, 1); /* 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);