Author: andrew Date: Mon Feb 15 19:31:23 2016 New Revision: 295634 URL: https://svnweb.freebsd.org/changeset/base/295634
Log: Add support for the AXP209 Power System Management IC. This allows boards with this and an Allwinner SoC to power off. Submitted by: Emmanuel Vadot <m...@bidouilliste.com> Differential Revision: https://reviews.freebsd.org/D4954 Added: head/sys/arm/allwinner/axp209.c (contents, props changed) Modified: head/sys/arm/allwinner/files.allwinner Added: head/sys/arm/allwinner/axp209.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/arm/allwinner/axp209.c Mon Feb 15 19:31:23 2016 (r295634) @@ -0,0 +1,182 @@ +/*- + * Copyright (c) 2015 Emmanuel Vadot <m...@bidouilliste.com> + * 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 <sys/cdefs.h> +__FBSDID("$FreeBSD$"); +/* +* X-Power AXP209 PMU for Allwinner SoCs +*/ +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/eventhandler.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/clock.h> +#include <sys/time.h> +#include <sys/bus.h> +#include <sys/proc.h> +#include <sys/reboot.h> +#include <sys/resource.h> +#include <sys/rman.h> + +#include <dev/iicbus/iicbus.h> +#include <dev/iicbus/iiconf.h> + +#include <dev/ofw/openfirm.h> +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include "iicbus_if.h" + +/* Power State Register */ +#define AXP209_PSR 0x00 +#define AXP209_PSR_ACIN 0x80 +#define AXP209_PSR_VBUS 0x20 + +/* Shutdown and battery control */ +#define AXP209_SHUTBAT 0x32 +#define AXP209_SHUTBAT_SHUTDOWN 0x80 + +struct axp209_softc { + uint32_t addr; + struct intr_config_hook enum_hook; +}; + +static int +axp209_read(device_t dev, uint8_t reg, uint8_t *data, uint8_t size) +{ + struct axp209_softc *sc = device_get_softc(dev); + struct iic_msg msg[2]; + + 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 +axp209_write(device_t dev, uint8_t reg, uint8_t data) +{ + uint8_t buffer[2]; + struct axp209_softc *sc = device_get_softc(dev); + struct iic_msg msg; + + buffer[0] = reg; + buffer[1] = data; + + msg.slave = sc->addr; + msg.flags = IIC_M_WR; + msg.len = 2; + msg.buf = buffer; + + return (iicbus_transfer(dev, &msg, 1)); +} + +static void +axp209_shutdown(void *devp, int howto) +{ + device_t dev; + + if (!(howto & RB_POWEROFF)) + return; + dev = (device_t)devp; + + if (bootverbose) + device_printf(dev, "Shutdown AXP209\n"); + + axp209_write(dev, AXP209_SHUTBAT, AXP209_SHUTBAT_SHUTDOWN); +} + +static int +axp209_probe(device_t dev) +{ + + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + if (!ofw_bus_is_compatible(dev, "x-powers,axp209")) + return (ENXIO); + + device_set_desc(dev, "X-Power AXP209 Power Management Unit"); + + return (BUS_PROBE_DEFAULT); +} + +static int +axp209_attach(device_t dev) +{ + struct axp209_softc *sc; + uint8_t data; + uint8_t pwr_src; + char pwr_name[4][11] = {"Battery", "AC", "USB", "AC and USB"}; + + sc = device_get_softc(dev); + + sc->addr = iicbus_get_addr(dev); + + /* + * Read the Power State register + * bit 7 is AC presence, bit 5 is VBUS presence. + * If none are set then we are running from battery (obviously). + */ + axp209_read(dev, AXP209_PSR, &data, 1); + pwr_src = ((data & AXP209_PSR_ACIN) >> 7) | + ((data & AXP209_PSR_VBUS) >> 4); + + if (bootverbose) + device_printf(dev, "AXP209 Powered by %s\n", + pwr_name[pwr_src]); + + EVENTHANDLER_REGISTER(shutdown_final, axp209_shutdown, dev, + SHUTDOWN_PRI_LAST); + + return (0); +} + +static device_method_t axp209_methods[] = { + DEVMETHOD(device_probe, axp209_probe), + DEVMETHOD(device_attach, axp209_attach), + {0, 0}, +}; + +static driver_t axp209_driver = { + "axp209_pmu", + axp209_methods, + sizeof(struct axp209_softc), +}; + +static devclass_t axp209_devclass; + +DRIVER_MODULE(axp209, iicbus, axp209_driver, axp209_devclass, 0, 0); +MODULE_VERSION(axp209, 1); +MODULE_DEPEND(axp209, iicbus, 1, 1, 1); Modified: head/sys/arm/allwinner/files.allwinner ============================================================================== --- head/sys/arm/allwinner/files.allwinner Mon Feb 15 19:14:24 2016 (r295633) +++ head/sys/arm/allwinner/files.allwinner Mon Feb 15 19:31:23 2016 (r295634) @@ -11,6 +11,7 @@ arm/allwinner/a10_sramc.c standard arm/allwinner/a10_wdog.c standard arm/allwinner/a20/a20_cpu_cfg.c standard arm/allwinner/allwinner_machdep.c standard +arm/allwinner/axp209.c optional axp209 arm/allwinner/if_emac.c optional emac dev/iicbus/twsi/a10_twsi.c optional twsi #arm/allwinner/console.c standard _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
