327 lines
7.7 KiB
C
327 lines
7.7 KiB
C
/*-
|
|
* 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)
|
|
{
|
|
return (iicdev_readfrom(dev, reg, data, size, IIC_INTRWAIT));
|
|
}
|
|
|
|
static int
|
|
syr827_write(device_t dev, uint8_t reg, uint8_t val)
|
|
{
|
|
return (iicdev_writeto(dev, reg, &val, 1, IIC_INTRWAIT));
|
|
}
|
|
|
|
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);
|
|
IICBUS_FDT_PNP_INFO(compat_data);
|