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Date:      Sat, 1 Dec 2018 20:31:50 +0000 (UTC)
From:      Emmanuel Vadot <manu@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   svn commit: r341386 - in head/sys: arm64/conf conf dev/iicbus
Message-ID:  <201812012031.wB1KVoAr063670@repo.freebsd.org>

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Author: manu
Date: Sat Dec  1 20:31:49 2018
New Revision: 341386
URL: https://svnweb.freebsd.org/changeset/base/341386

Log:
  Add Silergy SYR827 PMIC driver
  
  SYR827 is a PMIC that can output a voltage from 0.7125V to 1.5V in 12.5mV steps
  It's controlled via I2C.
  
  MFC after:	1 month

Added:
  head/sys/dev/iicbus/syr827.c   (contents, props changed)
Modified:
  head/sys/arm64/conf/GENERIC
  head/sys/conf/files

Modified: head/sys/arm64/conf/GENERIC
==============================================================================
--- head/sys/arm64/conf/GENERIC	Sat Dec  1 20:31:05 2018	(r341385)
+++ head/sys/arm64/conf/GENERIC	Sat Dec  1 20:31:49 2018	(r341386)
@@ -211,6 +211,7 @@ device		iicbus
 device		iic
 device		twsi		# Allwinner I2C controller
 device		rk_i2c		# RockChip I2C controller
+device		syr827		# Silergy SYR827 PMIC
 
 # Clock and reset controllers
 device		aw_ccu		# Allwinner clock controller

Modified: head/sys/conf/files
==============================================================================
--- head/sys/conf/files	Sat Dec  1 20:31:05 2018	(r341385)
+++ head/sys/conf/files	Sat Dec  1 20:31:49 2018	(r341386)
@@ -1826,6 +1826,7 @@ dev/iicbus/ds13rtc.c		optional ds13rtc | ds133x | ds13
 dev/iicbus/ds1672.c		optional ds1672
 dev/iicbus/ds3231.c		optional ds3231
 dev/iicbus/rtc8583.c		optional rtc8583
+dev/iicbus/syr827.c		optional ext_resources syr827
 dev/iicbus/icee.c		optional icee
 dev/iicbus/if_ic.c		optional ic
 dev/iicbus/iic.c		optional iic

Added: head/sys/dev/iicbus/syr827.c
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ head/sys/dev/iicbus/syr827.c	Sat Dec  1 20:31:49 2018	(r341386)
@@ -0,0 +1,354 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2016 Jared McNeill <jmcneill@invisible.ca>
+ * Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org>
+ *
+ * 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("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/rman.h>
+#include <sys/kernel.h>
+#include <sys/reboot.h>
+#include <sys/module.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 <dev/extres/regulator/regulator.h>
+
+#include "iicbus_if.h"
+#include "regdev_if.h"
+
+#define	VSEL0	0x00
+#define	VSEL1	0x01
+
+#define	VSEL_BUCK_EN	(1 << 7)
+#define	VSEL_NSEL_MASK	0x3F
+#define	VSEL_VOLTAGE_BASE	712500 /* uV */
+#define	VSEL_VOLTAGE_STEP	12500  /* uV */
+
+#define	ID1	0x03
+#define	 ID1_VENDOR_MASK	0xE0
+#define	 ID1_VENDOR_SHIFT	5
+#define	 ID1_DIE_MASK		0xF
+
+#define	ID2	0x4
+#define	 ID2_DIE_REV_MASK	0xF
+
+static struct ofw_compat_data compat_data[] = {
+	{ "silergy,syr827",			1 },
+	{ NULL,					0 }
+};
+
+struct syr827_reg_sc {
+	struct regnode		*regnode;
+	device_t		base_dev;
+	phandle_t		xref;
+	struct regnode_std_param *param;
+
+	int			volt_reg;
+	int			suspend_reg;
+};
+
+struct syr827_softc {
+	uint16_t		addr;
+	struct intr_config_hook	intr_hook;
+
+	/* Regulator */
+	struct syr827_reg_sc	*reg;
+};
+
+static int
+syr827_read(device_t dev, uint8_t reg, uint8_t *data, uint8_t size)
+{
+	struct syr827_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 = &reg;
+
+	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
+syr827_write(device_t dev, uint8_t reg, uint8_t val)
+{
+	struct syr827_softc *sc;
+	struct iic_msg msg;
+	uint8_t buffer[2];
+
+	sc = device_get_softc(dev);
+
+	buffer[0] = reg;
+	buffer[1] = val;
+
+	msg.slave = sc->addr;
+	msg.flags = IIC_M_WR;
+	msg.len = 2;
+	msg.buf = buffer;
+
+	return (iicbus_transfer(dev, &msg, 1));
+}
+
+static int
+syr827_regnode_init(struct regnode *regnode)
+{
+	return (0);
+}
+
+static int
+syr827_regnode_enable(struct regnode *regnode, bool enable, int *udelay)
+{
+	struct syr827_reg_sc *sc;
+	uint8_t val;
+
+	sc = regnode_get_softc(regnode);
+
+	syr827_read(sc->base_dev, sc->volt_reg, &val, 1);
+	if (enable)
+		val &= ~VSEL_BUCK_EN;
+	else
+		val |= VSEL_BUCK_EN;
+	syr827_write(sc->base_dev, sc->volt_reg, val);
+
+	*udelay = sc->param->ramp_delay;
+
+	return (0);
+}
+
+static int
+syr827_regnode_set_voltage(struct regnode *regnode, int min_uvolt,
+    int max_uvolt, int *udelay)
+{
+	struct syr827_reg_sc *sc;
+	int cur_uvolt;
+	uint8_t val;
+
+	sc = regnode_get_softc(regnode);
+
+	/* Get current voltage */
+	syr827_read(sc->base_dev, sc->volt_reg, &val, 1);
+	cur_uvolt = (val & VSEL_NSEL_MASK) * VSEL_VOLTAGE_STEP +
+	    VSEL_VOLTAGE_BASE;
+
+	/* Set new voltage */
+	val &= ~VSEL_NSEL_MASK;
+	val |= ((min_uvolt - VSEL_VOLTAGE_BASE) / VSEL_VOLTAGE_STEP);
+	syr827_write(sc->base_dev, sc->volt_reg, val);
+
+	/* Time to delay is based on the number of voltage steps */
+	*udelay = sc->param->ramp_delay *
+	    (abs(cur_uvolt - min_uvolt) / VSEL_VOLTAGE_STEP);
+
+	return (0);
+}
+
+static int
+syr827_regnode_get_voltage(struct regnode *regnode, int *uvolt)
+{
+	struct syr827_reg_sc *sc;
+	uint8_t val;
+
+	sc = regnode_get_softc(regnode);
+
+	syr827_read(sc->base_dev, sc->volt_reg, &val, 1);
+	*uvolt = (val & VSEL_NSEL_MASK) * VSEL_VOLTAGE_STEP +
+	    VSEL_VOLTAGE_BASE;
+
+	return (0);
+}
+
+static regnode_method_t syr827_regnode_methods[] = {
+	/* Regulator interface */
+	REGNODEMETHOD(regnode_init,		syr827_regnode_init),
+	REGNODEMETHOD(regnode_enable,		syr827_regnode_enable),
+	REGNODEMETHOD(regnode_set_voltage,	syr827_regnode_set_voltage),
+	REGNODEMETHOD(regnode_get_voltage,	syr827_regnode_get_voltage),
+	REGNODEMETHOD_END
+};
+DEFINE_CLASS_1(syr827_regnode, syr827_regnode_class, syr827_regnode_methods,
+    sizeof(struct syr827_reg_sc), regnode_class);
+
+static struct syr827_reg_sc *
+syr827_reg_attach(device_t dev, phandle_t node)
+{
+	struct syr827_reg_sc *reg_sc;
+	struct regnode_init_def initdef;
+	struct regnode *regnode;
+	int suspend_reg;
+
+	memset(&initdef, 0, sizeof(initdef));
+	regulator_parse_ofw_stdparam(dev, node, &initdef);
+	initdef.id = 0;
+	initdef.ofw_node = node;
+	regnode = regnode_create(dev, &syr827_regnode_class, &initdef);
+	if (regnode == NULL) {
+		device_printf(dev, "cannot create regulator\n");
+		return (NULL);
+	}
+
+	reg_sc = regnode_get_softc(regnode);
+	reg_sc->regnode = regnode;
+	reg_sc->base_dev = dev;
+	reg_sc->xref = OF_xref_from_node(node);
+	reg_sc->param = regnode_get_stdparam(regnode);
+
+	if (OF_getencprop(node, "fcs,suspend-voltage-selector", &suspend_reg,
+	    sizeof(uint32_t)) <= 0)
+		suspend_reg = 0;
+
+	switch (suspend_reg) {
+	case 0:
+		reg_sc->suspend_reg = VSEL0;
+		reg_sc->volt_reg = VSEL1;
+		break;
+	case 1:
+		reg_sc->suspend_reg = VSEL1;
+		reg_sc->volt_reg = VSEL0;
+		break;
+	}
+
+	regnode_register(regnode);
+
+	return (reg_sc);
+}
+
+static int
+syr827_regdev_map(device_t dev, phandle_t xref, int ncells, pcell_t *cells,
+    intptr_t *num)
+{
+	struct syr827_softc *sc;
+
+	sc = device_get_softc(dev);
+
+	if (sc->reg->xref != xref)
+		return (ENXIO);
+
+	*num = 0;
+
+	return (0);
+}
+
+static int
+syr827_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, "Silergy SYR827 regulator");
+
+	return (BUS_PROBE_DEFAULT);
+}
+
+static void
+syr827_start(void *pdev)
+{
+	struct syr827_softc *sc;
+	device_t dev;
+	uint8_t val;
+
+	dev = pdev;
+	sc = device_get_softc(dev);
+
+	if (bootverbose) {
+		syr827_read(dev, ID1, &val, 1);
+		device_printf(dev, "Vendor ID: %x, DIE ID: %x\n",
+		    (val & ID1_VENDOR_MASK) >> ID1_VENDOR_SHIFT,
+		    val & ID1_DIE_MASK);
+		syr827_read(dev, ID2, &val, 1);
+		device_printf(dev, "DIE Rev: %x\n", val & ID2_DIE_REV_MASK);
+	}
+
+	config_intrhook_disestablish(&sc->intr_hook);
+}
+
+static int
+syr827_attach(device_t dev)
+{
+	struct syr827_softc *sc;
+	phandle_t node;
+
+	sc = device_get_softc(dev);
+	node = ofw_bus_get_node(dev);
+
+	sc->addr = iicbus_get_addr(dev);
+
+	sc->intr_hook.ich_func = syr827_start;
+	sc->intr_hook.ich_arg = dev;
+
+	if (config_intrhook_establish(&sc->intr_hook) != 0)
+		return (ENOMEM);
+
+	sc->reg = syr827_reg_attach(dev, node);
+	if (sc->reg == NULL) {
+		device_printf(dev, "cannot attach regulator\n");
+		return (ENXIO);
+	}
+
+	return (0);
+}
+
+static device_method_t syr827_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		syr827_probe),
+	DEVMETHOD(device_attach,	syr827_attach),
+
+	/* Regdev interface */
+	DEVMETHOD(regdev_map,		syr827_regdev_map),
+
+	DEVMETHOD_END
+};
+
+static driver_t syr827_driver = {
+	"syr827",
+	syr827_methods,
+	sizeof(struct syr827_softc),
+};
+
+static devclass_t syr827_devclass;
+
+EARLY_DRIVER_MODULE(syr827, iicbus, syr827_driver, syr827_devclass, 0, 0,
+    BUS_PASS_RESOURCE);
+MODULE_VERSION(syr827, 1);
+MODULE_DEPEND(syr827, iicbus, 1, 1, 1);



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