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/*
* qdev GPIO helpers
*
* Copyright (c) 2009 CodeSourcery
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "hw/qdev-core.h"
#include "hw/irq.h"
#include "qapi/error.h"
static NamedGPIOList *qdev_get_named_gpio_list(DeviceState *dev,
const char *name)
{
NamedGPIOList *ngl;
QLIST_FOREACH(ngl, &dev->gpios, node) {
/* NULL is a valid and matchable name. */
if (g_strcmp0(name, ngl->name) == 0) {
return ngl;
}
}
ngl = g_malloc0(sizeof(*ngl));
ngl->name = g_strdup(name);
QLIST_INSERT_HEAD(&dev->gpios, ngl, node);
return ngl;
}
void qdev_init_gpio_in_named_with_opaque(DeviceState *dev,
qemu_irq_handler handler,
void *opaque,
const char *name, int n)
{
int i;
NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
assert(gpio_list->num_out == 0 || !name);
gpio_list->in = qemu_extend_irqs(gpio_list->in, gpio_list->num_in, handler,
opaque, n);
if (!name) {
name = "unnamed-gpio-in";
}
for (i = gpio_list->num_in; i < gpio_list->num_in + n; i++) {
gchar *propname = g_strdup_printf("%s[%u]", name, i);
object_property_add_child(OBJECT(dev), propname,
OBJECT(gpio_list->in[i]));
g_free(propname);
}
gpio_list->num_in += n;
}
void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n)
{
qdev_init_gpio_in_named(dev, handler, NULL, n);
}
void qdev_init_gpio_out_named(DeviceState *dev, qemu_irq *pins,
const char *name, int n)
{
int i;
NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
assert(gpio_list->num_in == 0 || !name);
if (!name) {
name = "unnamed-gpio-out";
}
memset(pins, 0, sizeof(*pins) * n);
for (i = 0; i < n; ++i) {
gchar *propname = g_strdup_printf("%s[%u]", name,
gpio_list->num_out + i);
object_property_add_link(OBJECT(dev), propname, TYPE_IRQ,
(Object **)&pins[i],
object_property_allow_set_link,
OBJ_PROP_LINK_STRONG);
g_free(propname);
}
gpio_list->num_out += n;
}
void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n)
{
qdev_init_gpio_out_named(dev, pins, NULL, n);
}
qemu_irq qdev_get_gpio_in_named(DeviceState *dev, const char *name, int n)
{
NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
assert(n >= 0 && n < gpio_list->num_in);
return gpio_list->in[n];
}
qemu_irq qdev_get_gpio_in(DeviceState *dev, int n)
{
return qdev_get_gpio_in_named(dev, NULL, n);
}
void qdev_connect_gpio_out_named(DeviceState *dev, const char *name, int n,
qemu_irq input_pin)
{
char *propname = g_strdup_printf("%s[%d]",
name ? name : "unnamed-gpio-out", n);
if (input_pin && !OBJECT(input_pin)->parent) {
/* We need a name for object_property_set_link to work */
object_property_add_child(container_get(qdev_get_machine(),
"/unattached"),
"non-qdev-gpio[*]", OBJECT(input_pin));
}
object_property_set_link(OBJECT(dev), propname,
OBJECT(input_pin), &error_abort);
g_free(propname);
}
qemu_irq qdev_get_gpio_out_connector(DeviceState *dev, const char *name, int n)
{
g_autofree char *propname = g_strdup_printf("%s[%d]",
name ? name : "unnamed-gpio-out", n);
qemu_irq ret = (qemu_irq)object_property_get_link(OBJECT(dev), propname,
NULL);
return ret;
}
/* disconnect a GPIO output, returning the disconnected input (if any) */
static qemu_irq qdev_disconnect_gpio_out_named(DeviceState *dev,
const char *name, int n)
{
char *propname = g_strdup_printf("%s[%d]",
name ? name : "unnamed-gpio-out", n);
qemu_irq ret = (qemu_irq)object_property_get_link(OBJECT(dev), propname,
NULL);
if (ret) {
object_property_set_link(OBJECT(dev), propname, NULL, NULL);
}
g_free(propname);
return ret;
}
qemu_irq qdev_intercept_gpio_out(DeviceState *dev, qemu_irq icpt,
const char *name, int n)
{
qemu_irq disconnected = qdev_disconnect_gpio_out_named(dev, name, n);
qdev_connect_gpio_out_named(dev, name, n, icpt);
return disconnected;
}
void qdev_connect_gpio_out(DeviceState *dev, int n, qemu_irq input_pin)
{
qdev_connect_gpio_out_named(dev, NULL, n, input_pin);
}
void qdev_pass_gpios(DeviceState *dev, DeviceState *container,
const char *name)
{
int i;
NamedGPIOList *ngl = qdev_get_named_gpio_list(dev, name);
for (i = 0; i < ngl->num_in; i++) {
const char *nm = ngl->name ? ngl->name : "unnamed-gpio-in";
char *propname = g_strdup_printf("%s[%d]", nm, i);
object_property_add_alias(OBJECT(container), propname,
OBJECT(dev), propname);
g_free(propname);
}
for (i = 0; i < ngl->num_out; i++) {
const char *nm = ngl->name ? ngl->name : "unnamed-gpio-out";
char *propname = g_strdup_printf("%s[%d]", nm, i);
object_property_add_alias(OBJECT(container), propname,
OBJECT(dev), propname);
g_free(propname);
}
QLIST_REMOVE(ngl, node);
QLIST_INSERT_HEAD(&container->gpios, ngl, node);
}
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