Author: jmcneill Date: Sat May 14 23:33:57 2016 New Revision: 299786 URL: https://svnweb.freebsd.org/changeset/base/299786
Log: Add a basic driver for X-Powers AXP813 and AXP818 power management ICs. This driver simply installs a shutdown event handler for handling RB_POWEROFF at shutdown. Tested on a Sinovoip BananaPi BPI-M3. Added: head/sys/arm/allwinner/axp81x.c (contents, props changed) Added: head/sys/arm/allwinner/axp81x.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/arm/allwinner/axp81x.c Sat May 14 23:33:57 2016 (r299786) @@ -0,0 +1,180 @@ +/*- + * Copyright (c) 2016 Jared McNeill <[email protected]> + * 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 ``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 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. + * + * $FreeBSD$ + */ + +/* + * X-Powers AXP813/818 PMU for Allwinner SoCs + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/eventhandler.h> +#include <sys/bus.h> +#include <sys/rman.h> +#include <sys/kernel.h> +#include <sys/reboot.h> +#include <sys/module.h> +#include <machine/bus.h> + +#include <dev/iicbus/iicbus.h> +#include <dev/iicbus/iiconf.h> + +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include "iicbus_if.h" + +#define AXP_ICTYPE 0x03 +#define AXP_POWERBAT 0x32 +#define AXP_POWERBAT_SHUTDOWN (1 << 7) + +static struct ofw_compat_data compat_data[] = { + { "x-powers,axp813", 1 }, + { "x-powers,axp818", 1 }, + { NULL, 0 } +}; + +struct axp81x_softc { + uint16_t addr; + struct intr_config_hook enum_hook; +}; + +static int +axp81x_read(device_t dev, uint8_t reg, uint8_t *data, uint8_t size) +{ + struct axp81x_softc *sc; + struct iic_msg msg[2]; + + sc = device_get_softc(dev); + + msg[0].slave = sc->addr; + msg[0].flags = IIC_M_WR; + msg[0].len = 1; + msg[0].buf = ® + + msg[1].slave = sc->addr; + msg[1].flags = IIC_M_RD; + msg[1].len = size; + msg[1].buf = data; + + return (iicbus_transfer(dev, msg, 2)); +} + +static int +axp81x_write(device_t dev, uint8_t reg, uint8_t val) +{ + struct axp81x_softc *sc; + struct iic_msg msg[2]; + + sc = device_get_softc(dev); + + msg[0].slave = sc->addr; + msg[0].flags = IIC_M_WR; + msg[0].len = 1; + msg[0].buf = ® + + msg[1].slave = sc->addr; + msg[1].flags = IIC_M_WR; + msg[1].len = 1; + msg[1].buf = &val; + + return (iicbus_transfer(dev, msg, 2)); +} + +static void +axp81x_shutdown(void *devp, int howto) +{ + device_t dev; + + if ((howto & RB_POWEROFF) == 0) + return; + + dev = devp; + + if (bootverbose) + device_printf(dev, "Shutdown AXP81x\n"); + + axp81x_write(dev, AXP_POWERBAT, AXP_POWERBAT_SHUTDOWN); +} + +static int +axp81x_probe(device_t dev) +{ + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) + return (ENXIO); + + device_set_desc(dev, "X-Powers AXP81x Power Management Unit"); + + return (BUS_PROBE_DEFAULT); +} + +static int +axp81x_attach(device_t dev) +{ + struct axp81x_softc *sc; + uint8_t chip_id; + + sc = device_get_softc(dev); + + sc->addr = iicbus_get_addr(dev); + + if (bootverbose) { + axp81x_read(dev, AXP_ICTYPE, &chip_id, 1); + device_printf(dev, "chip ID 0x%02x\n", chip_id); + } + + EVENTHANDLER_REGISTER(shutdown_final, axp81x_shutdown, dev, + SHUTDOWN_PRI_LAST); + + return (0); +} + +static device_method_t axp81x_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, axp81x_probe), + DEVMETHOD(device_attach, axp81x_attach), + + DEVMETHOD_END +}; + +static driver_t axp81x_driver = { + "axp81x_pmu", + axp81x_methods, + sizeof(struct axp81x_softc), +}; + +static devclass_t axp81x_devclass; + +DRIVER_MODULE(axp81x, iicbus, axp81x_driver, axp81x_devclass, 0, 0); +MODULE_VERSION(axp81x, 1); +MODULE_DEPEND(axp81x, iicbus, 1, 1, 1); _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "[email protected]"
