434 lines
11 KiB
C
434 lines
11 KiB
C
/*-
|
|
* Copyright 2015 John Wehle <john@feith.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.
|
|
*/
|
|
|
|
/*
|
|
* Amlogic aml8726 pinctrl driver.
|
|
*
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/resource.h>
|
|
#include <sys/rman.h>
|
|
|
|
#include <machine/bus.h>
|
|
|
|
#include <dev/fdt/fdt_common.h>
|
|
#include <dev/fdt/fdt_pinctrl.h>
|
|
#include <dev/ofw/ofw_bus.h>
|
|
#include <dev/ofw/ofw_bus_subr.h>
|
|
|
|
#include <arm/amlogic/aml8726/aml8726_soc.h>
|
|
#include <arm/amlogic/aml8726/aml8726_pinctrl.h>
|
|
|
|
struct aml8726_pinctrl_softc {
|
|
device_t dev;
|
|
struct {
|
|
struct aml8726_pinctrl_function *func;
|
|
struct aml8726_pinctrl_pkg_pin *ppin;
|
|
boolean_t pud_ctrl;
|
|
} soc;
|
|
struct resource *res[6];
|
|
struct mtx mtx;
|
|
};
|
|
|
|
static struct resource_spec aml8726_pinctrl_spec[] = {
|
|
{ SYS_RES_MEMORY, 0, RF_ACTIVE }, /* mux */
|
|
{ SYS_RES_MEMORY, 1, RF_ACTIVE | RF_SHAREABLE }, /* pu/pd */
|
|
{ SYS_RES_MEMORY, 2, RF_ACTIVE | RF_SHAREABLE }, /* pull enable */
|
|
{ SYS_RES_MEMORY, 3, RF_ACTIVE }, /* ao mux */
|
|
{ SYS_RES_MEMORY, 4, RF_ACTIVE | RF_SHAREABLE }, /* ao pu/pd */
|
|
{ SYS_RES_MEMORY, 5, RF_ACTIVE | RF_SHAREABLE }, /* ao pull enable */
|
|
{ -1, 0 }
|
|
};
|
|
|
|
#define AML_PINCTRL_LOCK(sc) mtx_lock(&(sc)->mtx)
|
|
#define AML_PINCTRL_UNLOCK(sc) mtx_unlock(&(sc)->mtx)
|
|
#define AML_PINCTRL_LOCK_INIT(sc) \
|
|
mtx_init(&(sc)->mtx, device_get_nameunit((sc)->dev), \
|
|
"pinctrl", MTX_DEF)
|
|
#define AML_PINCTRL_LOCK_DESTROY(sc) mtx_destroy(&(sc)->mtx);
|
|
|
|
#define MUX_WRITE_4(sc, reg, val) bus_write_4((sc)->res[0], reg, (val))
|
|
#define MUX_READ_4(sc, reg) bus_read_4((sc)->res[0], reg)
|
|
|
|
#define PUD_WRITE_4(sc, reg, val) bus_write_4((sc)->res[1], reg, (val))
|
|
#define PUD_READ_4(sc, reg) bus_read_4((sc)->res[1], reg)
|
|
|
|
#define PEN_WRITE_4(sc, reg, val) bus_write_4((sc)->res[2], reg, (val))
|
|
#define PEN_READ_4(sc, reg) bus_read_4((sc)->res[2], reg)
|
|
|
|
#define AOMUX_WRITE_4(sc, reg, val) bus_write_4((sc)->res[3], reg, (val))
|
|
#define AOMUX_READ_4(sc, reg) bus_read_4((sc)->res[3], reg)
|
|
|
|
#define AOPUD_WRITE_4(sc, reg, val) bus_write_4((sc)->res[4], reg, (val))
|
|
#define AOPUD_READ_4(sc, reg) bus_read_4((sc)->res[4], reg)
|
|
|
|
#define AOPEN_WRITE_4(sc, reg, val) bus_write_4((sc)->res[5], reg, (val))
|
|
#define AOPEN_READ_4(sc, reg) bus_read_4((sc)->res[5], reg)
|
|
|
|
static int
|
|
aml8726_pinctrl_probe(device_t dev)
|
|
{
|
|
|
|
if (!ofw_bus_status_okay(dev))
|
|
return (ENXIO);
|
|
|
|
if (!ofw_bus_is_compatible(dev, "amlogic,aml8726-pinctrl"))
|
|
return (ENXIO);
|
|
|
|
device_set_desc(dev, "Amlogic aml8726 pinctrl");
|
|
|
|
return (BUS_PROBE_DEFAULT);
|
|
}
|
|
|
|
static int
|
|
aml8726_pinctrl_attach(device_t dev)
|
|
{
|
|
struct aml8726_pinctrl_softc *sc = device_get_softc(dev);
|
|
|
|
sc->dev = dev;
|
|
|
|
sc->soc.pud_ctrl = false;
|
|
|
|
switch (aml8726_soc_hw_rev) {
|
|
case AML_SOC_HW_REV_M3:
|
|
sc->soc.func = aml8726_m3_pinctrl;
|
|
sc->soc.ppin = aml8726_m3_pkg_pin;
|
|
break;
|
|
case AML_SOC_HW_REV_M6:
|
|
sc->soc.func = aml8726_m6_pinctrl;
|
|
sc->soc.ppin = aml8726_m6_pkg_pin;
|
|
break;
|
|
case AML_SOC_HW_REV_M8:
|
|
sc->soc.func = aml8726_m8_pinctrl;
|
|
sc->soc.ppin = aml8726_m8_pkg_pin;
|
|
sc->soc.pud_ctrl = true;
|
|
break;
|
|
case AML_SOC_HW_REV_M8B:
|
|
sc->soc.func = aml8726_m8b_pinctrl;
|
|
sc->soc.ppin = aml8726_m8b_pkg_pin;
|
|
sc->soc.pud_ctrl = true;
|
|
break;
|
|
default:
|
|
device_printf(dev, "unsupported SoC\n");
|
|
return (ENXIO);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
if (bus_alloc_resources(dev, aml8726_pinctrl_spec, sc->res)) {
|
|
device_printf(dev, "could not allocate resources for device\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
AML_PINCTRL_LOCK_INIT(sc);
|
|
|
|
fdt_pinctrl_register(dev, "amlogic,pins");
|
|
fdt_pinctrl_configure_tree(dev);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
aml8726_pinctrl_detach(device_t dev)
|
|
{
|
|
struct aml8726_pinctrl_softc *sc = device_get_softc(dev);
|
|
|
|
AML_PINCTRL_LOCK_DESTROY(sc);
|
|
|
|
bus_release_resources(dev, aml8726_pinctrl_spec, sc->res);
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
static int
|
|
aml8726_pinctrl_configure_pins(device_t dev, phandle_t cfgxref)
|
|
{
|
|
struct aml8726_pinctrl_softc *sc = device_get_softc(dev);
|
|
struct aml8726_pinctrl_function *cf;
|
|
struct aml8726_pinctrl_function *f;
|
|
struct aml8726_pinctrl_pkg_pin *pp;
|
|
struct aml8726_pinctrl_pin *cp;
|
|
struct aml8726_pinctrl_pin *p;
|
|
enum aml8726_pinctrl_pull_mode pm;
|
|
char *function_name;
|
|
char *pins;
|
|
char *pin_name;
|
|
char *pull;
|
|
phandle_t node;
|
|
ssize_t len;
|
|
uint32_t value;
|
|
|
|
node = OF_node_from_xref(cfgxref);
|
|
|
|
len = OF_getprop_alloc(node, "amlogic,function",
|
|
sizeof(char), (void **)&function_name);
|
|
|
|
if (len < 0) {
|
|
device_printf(dev,
|
|
"missing amlogic,function attribute in FDT\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
for (f = sc->soc.func; f->name != NULL; f++)
|
|
if (strncmp(f->name, function_name, len) == 0)
|
|
break;
|
|
|
|
if (f->name == NULL) {
|
|
device_printf(dev, "unknown function attribute %.*s in FDT\n",
|
|
len, function_name);
|
|
free(function_name, M_OFWPROP);
|
|
return (ENXIO);
|
|
}
|
|
|
|
free(function_name, M_OFWPROP);
|
|
|
|
len = OF_getprop_alloc(node, "amlogic,pull",
|
|
sizeof(char), (void **)&pull);
|
|
|
|
pm = aml8726_unknown_pm;
|
|
|
|
if (len > 0) {
|
|
if (strncmp(pull, "enable", len) == 0)
|
|
pm = aml8726_enable_pm;
|
|
else if (strncmp(pull, "disable", len) == 0)
|
|
pm = aml8726_disable_pm;
|
|
else if (strncmp(pull, "down", len) == 0)
|
|
pm = aml8726_enable_down_pm;
|
|
else if (strncmp(pull, "up", len) == 0)
|
|
pm = aml8726_enable_up_pm;
|
|
else {
|
|
device_printf(dev,
|
|
"unknown pull attribute %.*s in FDT\n",
|
|
len, pull);
|
|
free(pull, M_OFWPROP);
|
|
return (ENXIO);
|
|
}
|
|
}
|
|
|
|
free(pull, M_OFWPROP);
|
|
|
|
/*
|
|
* Setting the pull direction isn't supported on all SoC.
|
|
*/
|
|
switch (pm) {
|
|
case aml8726_enable_down_pm:
|
|
case aml8726_enable_up_pm:
|
|
if (sc->soc.pud_ctrl == false) {
|
|
device_printf(dev,
|
|
"SoC doesn't support setting pull direction.\n");
|
|
return (ENXIO);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
len = OF_getprop_alloc(node, "amlogic,pins",
|
|
sizeof(char), (void **)&pins);
|
|
|
|
if (len < 0) {
|
|
device_printf(dev, "missing amlogic,pins attribute in FDT\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
pin_name = pins;
|
|
|
|
while (len) {
|
|
for (p = f->pins; p->name != NULL; p++)
|
|
if (strncmp(p->name, pin_name, len) == 0)
|
|
break;
|
|
|
|
if (p->name == NULL) {
|
|
/* display message prior to queuing up next string */
|
|
device_printf(dev, "unknown pin attribute %.*s in FDT\n",
|
|
len, pin_name);
|
|
}
|
|
|
|
/* queue up next string */
|
|
while (*pin_name && len) {
|
|
pin_name++;
|
|
len--;
|
|
}
|
|
if (len) {
|
|
pin_name++;
|
|
len--;
|
|
}
|
|
|
|
if (p->name == NULL)
|
|
continue;
|
|
|
|
for (pp = sc->soc.ppin; pp->pkg_name != NULL; pp++)
|
|
if (strcmp(pp->pkg_name, p->pkg_name) == 0)
|
|
break;
|
|
|
|
if (pp->pkg_name == NULL) {
|
|
device_printf(dev,
|
|
"missing entry for package pin %s\n",
|
|
p->pkg_name);
|
|
continue;
|
|
}
|
|
|
|
if (pm != aml8726_unknown_pm && pp->pull_bits == 0x00000000) {
|
|
device_printf(dev,
|
|
"missing pull info for package pin %s\n",
|
|
p->pkg_name);
|
|
continue;
|
|
}
|
|
|
|
AML_PINCTRL_LOCK(sc);
|
|
|
|
/*
|
|
* First clear all other mux bits associated with this
|
|
* package pin. This may briefly configure the pin as
|
|
* GPIO ... however this should be fine since after
|
|
* reset the default GPIO mode is input.
|
|
*/
|
|
|
|
for (cf = sc->soc.func; cf->name != NULL; cf++)
|
|
for (cp = cf->pins; cp->name != NULL; cp++) {
|
|
if (cp == p)
|
|
continue;
|
|
if (strcmp(cp->pkg_name, p->pkg_name) != 0)
|
|
continue;
|
|
if (cp->mux_bits == 0)
|
|
continue;
|
|
if (pp->aobus == false) {
|
|
value = MUX_READ_4(sc, cp->mux_addr);
|
|
value &= ~cp->mux_bits;
|
|
MUX_WRITE_4(sc, cp->mux_addr, value);
|
|
} else {
|
|
value = AOMUX_READ_4(sc, cp->mux_addr);
|
|
value &= ~cp->mux_bits;
|
|
AOMUX_WRITE_4(sc, cp->mux_addr, value);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now set the desired mux bits.
|
|
*
|
|
* In the case of GPIO there's no bits to set.
|
|
*/
|
|
|
|
if (p->mux_bits != 0) {
|
|
if (pp->aobus == false) {
|
|
value = MUX_READ_4(sc, p->mux_addr);
|
|
value |= p->mux_bits;
|
|
MUX_WRITE_4(sc, p->mux_addr, value);
|
|
} else {
|
|
value = AOMUX_READ_4(sc, p->mux_addr);
|
|
value |= p->mux_bits;
|
|
AOMUX_WRITE_4(sc, p->mux_addr, value);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Finally set the pull mode if it was specified.
|
|
*/
|
|
|
|
switch (pm) {
|
|
case aml8726_enable_down_pm:
|
|
case aml8726_enable_up_pm:
|
|
if (pp->aobus == false) {
|
|
value = PUD_READ_4(sc, pp->pull_addr);
|
|
if (pm == aml8726_enable_down_pm)
|
|
value &= ~pp->pull_bits;
|
|
else
|
|
value |= pp->pull_bits;
|
|
PUD_WRITE_4(sc, pp->pull_addr, value);
|
|
} else {
|
|
value = AOPUD_READ_4(sc, pp->pull_addr);
|
|
if (pm == aml8726_enable_down_pm)
|
|
value &= ~(pp->pull_bits << 16);
|
|
else
|
|
value |= (pp->pull_bits << 16);
|
|
AOPUD_WRITE_4(sc, pp->pull_addr, value);
|
|
}
|
|
/* FALLTHROUGH */
|
|
case aml8726_disable_pm:
|
|
case aml8726_enable_pm:
|
|
if (pp->aobus == false) {
|
|
value = PEN_READ_4(sc, pp->pull_addr);
|
|
if (pm == aml8726_disable_pm)
|
|
value &= ~pp->pull_bits;
|
|
else
|
|
value |= pp->pull_bits;
|
|
PEN_WRITE_4(sc, pp->pull_addr, value);
|
|
} else {
|
|
value = AOPEN_READ_4(sc, pp->pull_addr);
|
|
if (pm == aml8726_disable_pm)
|
|
value &= ~pp->pull_bits;
|
|
else
|
|
value |= pp->pull_bits;
|
|
AOPEN_WRITE_4(sc, pp->pull_addr, value);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
AML_PINCTRL_UNLOCK(sc);
|
|
}
|
|
|
|
free(pins, M_OFWPROP);
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
static device_method_t aml8726_pinctrl_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, aml8726_pinctrl_probe),
|
|
DEVMETHOD(device_attach, aml8726_pinctrl_attach),
|
|
DEVMETHOD(device_detach, aml8726_pinctrl_detach),
|
|
|
|
/* fdt_pinctrl interface */
|
|
DEVMETHOD(fdt_pinctrl_configure,aml8726_pinctrl_configure_pins),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
static driver_t aml8726_pinctrl_driver = {
|
|
"pinctrl",
|
|
aml8726_pinctrl_methods,
|
|
sizeof(struct aml8726_pinctrl_softc),
|
|
};
|
|
|
|
static devclass_t aml8726_pinctrl_devclass;
|
|
|
|
EARLY_DRIVER_MODULE(pinctrl, simplebus, aml8726_pinctrl_driver,
|
|
aml8726_pinctrl_devclass, 0, 0, BUS_PASS_CPU + BUS_PASS_ORDER_LATE);
|