svn commit: r295634 - head/sys/arm/allwinner
Andrew Turner
andrew at FreeBSD.org
Mon Feb 15 19:31:25 UTC 2016
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 <manu at 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 <manu at 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
More information about the svn-src-head
mailing list