freebsd-dev/sys/arm/at91/at91_pinctrl.c
2016-05-13 22:05:16 +00:00

518 lines
13 KiB
C

/*-
* Copyright (c) 2014 Warner Losh. 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 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 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/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/resource.h>
#include <sys/systm.h>
#include <sys/rman.h>
#include <machine/bus.h>
#include <arm/at91/at91var.h>
#include <arm/at91/at91_piovar.h>
#include <dev/fdt/fdt_common.h>
#include <dev/fdt/fdt_pinctrl.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#define BUS_PASS_PINMUX (BUS_PASS_INTERRUPT + 1)
struct pinctrl_range {
uint64_t bus;
uint64_t host;
uint64_t size;
};
struct pinctrl_softc {
device_t dev;
phandle_t node;
struct pinctrl_range *ranges;
int nranges;
pcell_t acells, scells;
int done_pinmux;
};
struct pinctrl_devinfo {
struct ofw_bus_devinfo obdinfo;
struct resource_list rl;
};
static int
at91_pinctrl_probe(device_t dev)
{
if (!ofw_bus_is_compatible(dev, "atmel,at91rm9200-pinctrl"))
return (ENXIO);
device_set_desc(dev, "pincontrol bus");
return (0);
}
/* XXX Make this a subclass of simplebus */
static struct pinctrl_devinfo *
at91_pinctrl_setup_dinfo(device_t dev, phandle_t node)
{
struct pinctrl_softc *sc;
struct pinctrl_devinfo *ndi;
uint32_t *reg, *intr, icells;
uint64_t phys, size;
phandle_t iparent;
int i, j, k;
int nintr;
int nreg;
sc = device_get_softc(dev);
ndi = malloc(sizeof(*ndi), M_DEVBUF, M_WAITOK | M_ZERO);
if (ofw_bus_gen_setup_devinfo(&ndi->obdinfo, node) != 0) {
free(ndi, M_DEVBUF);
return (NULL);
}
resource_list_init(&ndi->rl);
nreg = OF_getencprop_alloc(node, "reg", sizeof(*reg), (void **)&reg);
if (nreg == -1)
nreg = 0;
if (nreg % (sc->acells + sc->scells) != 0) {
// if (bootverbose)
device_printf(dev, "Malformed reg property on <%s>\n",
ndi->obdinfo.obd_name);
nreg = 0;
}
for (i = 0, k = 0; i < nreg; i += sc->acells + sc->scells, k++) {
phys = size = 0;
for (j = 0; j < sc->acells; j++) {
phys <<= 32;
phys |= reg[i + j];
}
for (j = 0; j < sc->scells; j++) {
size <<= 32;
size |= reg[i + sc->acells + j];
}
resource_list_add(&ndi->rl, SYS_RES_MEMORY, k,
phys, phys + size - 1, size);
}
OF_prop_free(reg);
nintr = OF_getencprop_alloc(node, "interrupts", sizeof(*intr),
(void **)&intr);
if (nintr > 0) {
if (OF_searchencprop(node, "interrupt-parent", &iparent,
sizeof(iparent)) == -1) {
device_printf(dev, "No interrupt-parent found, "
"assuming direct parent\n");
iparent = OF_parent(node);
}
if (OF_searchencprop(OF_node_from_xref(iparent),
"#interrupt-cells", &icells, sizeof(icells)) == -1) {
device_printf(dev, "Missing #interrupt-cells property,"
" assuming <1>\n");
icells = 1;
}
if (icells < 1 || icells > nintr) {
device_printf(dev, "Invalid #interrupt-cells property "
"value <%d>, assuming <1>\n", icells);
icells = 1;
}
for (i = 0, k = 0; i < nintr; i += icells, k++) {
intr[i] = ofw_bus_map_intr(dev, iparent, icells,
&intr[i]);
resource_list_add(&ndi->rl, SYS_RES_IRQ, k, intr[i],
intr[i], 1);
}
OF_prop_free(intr);
}
return (ndi);
}
static int
at91_pinctrl_fill_ranges(phandle_t node, struct pinctrl_softc *sc)
{
int host_address_cells;
cell_t *base_ranges;
ssize_t nbase_ranges;
int err;
int i, j, k;
err = OF_searchencprop(OF_parent(node), "#address-cells",
&host_address_cells, sizeof(host_address_cells));
if (err <= 0)
return (-1);
nbase_ranges = OF_getproplen(node, "ranges");
if (nbase_ranges < 0)
return (-1);
sc->nranges = nbase_ranges / sizeof(cell_t) /
(sc->acells + host_address_cells + sc->scells);
if (sc->nranges == 0)
return (0);
sc->ranges = malloc(sc->nranges * sizeof(sc->ranges[0]),
M_DEVBUF, M_WAITOK);
base_ranges = malloc(nbase_ranges, M_DEVBUF, M_WAITOK);
OF_getencprop(node, "ranges", base_ranges, nbase_ranges);
for (i = 0, j = 0; i < sc->nranges; i++) {
sc->ranges[i].bus = 0;
for (k = 0; k < sc->acells; k++) {
sc->ranges[i].bus <<= 32;
sc->ranges[i].bus |= base_ranges[j++];
}
sc->ranges[i].host = 0;
for (k = 0; k < host_address_cells; k++) {
sc->ranges[i].host <<= 32;
sc->ranges[i].host |= base_ranges[j++];
}
sc->ranges[i].size = 0;
for (k = 0; k < sc->scells; k++) {
sc->ranges[i].size <<= 32;
sc->ranges[i].size |= base_ranges[j++];
}
}
free(base_ranges, M_DEVBUF);
return (sc->nranges);
}
static int
at91_pinctrl_attach(device_t dev)
{
struct pinctrl_softc *sc;
struct pinctrl_devinfo *di;
phandle_t node;
device_t cdev;
sc = device_get_softc(dev);
node = ofw_bus_get_node(dev);
sc->dev = dev;
sc->node = node;
/*
* Some important numbers
*/
sc->acells = 2;
OF_getencprop(node, "#address-cells", &sc->acells, sizeof(sc->acells));
sc->scells = 1;
OF_getencprop(node, "#size-cells", &sc->scells, sizeof(sc->scells));
if (at91_pinctrl_fill_ranges(node, sc) < 0) {
device_printf(dev, "could not get ranges\n");
return (ENXIO);
}
for (node = OF_child(node); node > 0; node = OF_peer(node)) {
if ((di = at91_pinctrl_setup_dinfo(dev, node)) == NULL)
continue;
cdev = device_add_child(dev, NULL, -1);
if (cdev == NULL) {
device_printf(dev, "<%s>: device_add_child failed\n",
di->obdinfo.obd_name);
resource_list_free(&di->rl);
ofw_bus_gen_destroy_devinfo(&di->obdinfo);
free(di, M_DEVBUF);
continue;
}
device_set_ivars(cdev, di);
}
fdt_pinctrl_register(dev, "atmel,pins");
return (bus_generic_attach(dev));
}
static const struct ofw_bus_devinfo *
pinctrl_get_devinfo(device_t bus __unused, device_t child)
{
struct pinctrl_devinfo *ndi;
ndi = device_get_ivars(child);
return (&ndi->obdinfo);
}
static struct resource *
pinctrl_alloc_resource(device_t bus, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct pinctrl_softc *sc;
struct pinctrl_devinfo *di;
struct resource_list_entry *rle;
int j;
sc = device_get_softc(bus);
/*
* Request for the default allocation with a given rid: use resource
* list stored in the local device info.
*/
if (RMAN_IS_DEFAULT_RANGE(start, end)) {
if ((di = device_get_ivars(child)) == NULL)
return (NULL);
if (type == SYS_RES_IOPORT)
type = SYS_RES_MEMORY;
rle = resource_list_find(&di->rl, type, *rid);
if (rle == NULL) {
// if (bootverbose)
device_printf(bus, "no default resources for "
"rid = %d, type = %d\n", *rid, type);
return (NULL);
}
start = rle->start;
end = rle->end;
count = rle->count;
}
if (type == SYS_RES_MEMORY) {
/* Remap through ranges property */
for (j = 0; j < sc->nranges; j++) {
if (start >= sc->ranges[j].bus && end <
sc->ranges[j].bus + sc->ranges[j].size) {
start -= sc->ranges[j].bus;
start += sc->ranges[j].host;
end -= sc->ranges[j].bus;
end += sc->ranges[j].host;
break;
}
}
if (j == sc->nranges && sc->nranges != 0) {
// if (bootverbose)
device_printf(bus, "Could not map resource "
"%#lx-%#lx\n", start, end);
return (NULL);
}
}
return (bus_generic_alloc_resource(bus, child, type, rid, start, end,
count, flags));
}
static int
pinctrl_print_res(struct pinctrl_devinfo *di)
{
int rv;
rv = 0;
rv += resource_list_print_type(&di->rl, "mem", SYS_RES_MEMORY, "%#jx");
rv += resource_list_print_type(&di->rl, "irq", SYS_RES_IRQ, "%jd");
return (rv);
}
static void
pinctrl_probe_nomatch(device_t bus, device_t child)
{
const char *name, *type, *compat;
// if (!bootverbose)
return;
name = ofw_bus_get_name(child);
type = ofw_bus_get_type(child);
compat = ofw_bus_get_compat(child);
device_printf(bus, "<%s>", name != NULL ? name : "unknown");
pinctrl_print_res(device_get_ivars(child));
if (!ofw_bus_status_okay(child))
printf(" disabled");
if (type)
printf(" type %s", type);
if (compat)
printf(" compat %s", compat);
printf(" (no driver attached)\n");
}
static int
pinctrl_print_child(device_t bus, device_t child)
{
int rv;
rv = bus_print_child_header(bus, child);
rv += pinctrl_print_res(device_get_ivars(child));
if (!ofw_bus_status_okay(child))
rv += printf(" disabled");
rv += bus_print_child_footer(bus, child);
return (rv);
}
const char *periphs[] = {"gpio", "periph A", "periph B", "periph C", "periph D", "periph E" };
struct pincfg {
uint32_t unit;
uint32_t pin;
uint32_t periph;
uint32_t flags;
};
static int
pinctrl_configure_pins(device_t bus, phandle_t cfgxref)
{
struct pinctrl_softc *sc;
struct pincfg *cfg, *cfgdata;
char name[32];
phandle_t node;
ssize_t npins;
int i;
sc = device_get_softc(bus);
node = OF_node_from_xref(cfgxref);
memset(name, 0, sizeof(name));
OF_getprop(node, "name", name, sizeof(name));
npins = OF_getencprop_alloc(node, "atmel,pins", sizeof(*cfgdata),
(void **)&cfgdata);
if (npins < 0) {
printf("We're doing it wrong %s\n", name);
return (ENXIO);
}
if (npins == 0)
return (0);
for (i = 0, cfg = cfgdata; i < npins; i++, cfg++) {
uint32_t pio;
pio = (0xfffffff & sc->ranges[0].bus) + 0x200 * cfg->unit;
printf("P%c%d %s %#x\n", cfg->unit + 'A', cfg->pin,
periphs[cfg->periph], cfg->flags);
switch (cfg->periph) {
case 0:
at91_pio_use_gpio(pio, 1u << cfg->pin);
at91_pio_gpio_pullup(pio, 1u << cfg->pin,
!!(cfg->flags & 1));
at91_pio_gpio_high_z(pio, 1u << cfg->pin,
!!(cfg->flags & 2));
at91_pio_gpio_set_deglitch(pio,
1u << cfg->pin, !!(cfg->flags & 4));
// at91_pio_gpio_pulldown(pio, 1u << cfg->pin,
// !!(cfg->flags & 8));
// at91_pio_gpio_dis_schmidt(pio,
// 1u << cfg->pin, !!(cfg->flags & 16));
break;
case 1:
at91_pio_use_periph_a(pio, 1u << cfg->pin, cfg->flags);
break;
case 2:
at91_pio_use_periph_b(pio, 1u << cfg->pin, cfg->flags);
break;
}
}
OF_prop_free(cfgdata);
return (0);
}
static void
pinctrl_new_pass(device_t bus)
{
struct pinctrl_softc *sc;
sc = device_get_softc(bus);
bus_generic_new_pass(bus);
if (sc->done_pinmux || bus_current_pass < BUS_PASS_PINMUX)
return;
sc->done_pinmux++;
fdt_pinctrl_configure_tree(bus);
}
static device_method_t at91_pinctrl_methods[] = {
DEVMETHOD(device_probe, at91_pinctrl_probe),
DEVMETHOD(device_attach, at91_pinctrl_attach),
DEVMETHOD(bus_print_child, pinctrl_print_child),
DEVMETHOD(bus_probe_nomatch, pinctrl_probe_nomatch),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
DEVMETHOD(bus_alloc_resource, pinctrl_alloc_resource),
DEVMETHOD(bus_release_resource, bus_generic_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
DEVMETHOD(bus_new_pass, pinctrl_new_pass),
/* ofw_bus interface */
DEVMETHOD(ofw_bus_get_devinfo, pinctrl_get_devinfo),
DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
/* fdt_pintrl interface */
DEVMETHOD(fdt_pinctrl_configure,pinctrl_configure_pins),
DEVMETHOD_END
};
static driver_t at91_pinctrl_driver = {
"at91_pinctrl",
at91_pinctrl_methods,
sizeof(struct pinctrl_softc),
};
static devclass_t at91_pinctrl_devclass;
EARLY_DRIVER_MODULE(at91_pinctrl, simplebus, at91_pinctrl_driver,
at91_pinctrl_devclass, NULL, NULL, BUS_PASS_BUS);
/*
* dummy driver to force pass BUS_PASS_PINMUX to happen.
*/
static int
at91_pingroup_probe(device_t dev)
{
return ENXIO;
}
static device_method_t at91_pingroup_methods[] = {
DEVMETHOD(device_probe, at91_pingroup_probe),
DEVMETHOD_END
};
static driver_t at91_pingroup_driver = {
"at91_pingroup",
at91_pingroup_methods,
0,
};
static devclass_t at91_pingroup_devclass;
EARLY_DRIVER_MODULE(at91_pingroup, at91_pinctrl, at91_pingroup_driver,
at91_pingroup_devclass, NULL, NULL, BUS_PASS_PINMUX);