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qdev: Implement named GPIOs

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Implement named GPIOs on the Device layer. Listifies the existing GPIOs
stuff using string keys. Legacy un-named GPIOs are preserved by using
a NULL name string - they are just a single matchable element in the
name list.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
This commit is contained in:
Peter Crosthwaite 2014-05-19 23:30:58 -07:00 • committed by Andreas Färber
parent 6b1b144019
commit a5f54290ce
4 changed files with 120 additions and 24 deletions
Download patch file Download diff file Expand all files Collapse all files

85
hw/core/qdev.c
View file

@ -312,30 +312,82 @@ BusState *qdev_get_parent_bus(DeviceState *dev)
return dev->parent_bus;
}
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, otherwise do a normal
* strcmp match.
*/
if ((!ngl->name && !name) ||
(name && ngl->name && strcmp(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(DeviceState *dev, qemu_irq_handler handler,
const char *name, int n)
{
NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
gpio_list->in = qemu_extend_irqs(gpio_list->in, gpio_list->num_in, handler,
dev, n);
gpio_list->num_in += n;
}
void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n)
{
dev->gpio_in = qemu_extend_irqs(dev->gpio_in, dev->num_gpio_in, handler,
dev, n);
dev->num_gpio_in += 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)
{
NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
assert(gpio_list->num_out == 0);
gpio_list->num_out = n;
gpio_list->out = pins;
}
void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n)
{
assert(dev->num_gpio_out == 0);
dev->num_gpio_out = n;
dev->gpio_out = pins;
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)
{
assert(n >= 0 && n < dev->num_gpio_in);
return dev->gpio_in[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 pin)
{
NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
assert(n >= 0 && n < gpio_list->num_out);
gpio_list->out[n] = pin;
}
void qdev_connect_gpio_out(DeviceState * dev, int n, qemu_irq pin)
{
assert(n >= 0 && n < dev->num_gpio_out);
dev->gpio_out[n] = pin;
qdev_connect_gpio_out_named(dev, NULL, n, pin);
}
BusState *qdev_get_child_bus(DeviceState *dev, const char *name)
@ -844,6 +896,7 @@ static void device_initfn(Object *obj)
object_property_add_link(OBJECT(dev), "parent_bus", TYPE_BUS,
(Object **)&dev->parent_bus, NULL, 0,
&error_abort);
QLIST_INIT(&dev->gpios);
}
static void device_post_init(Object *obj)
@ -854,10 +907,22 @@ static void device_post_init(Object *obj)
/* Unlink device from bus and free the structure. */
static void device_finalize(Object *obj)
{
NamedGPIOList *ngl, *next;
DeviceState *dev = DEVICE(obj);
if (dev->opts) {
qemu_opts_del(dev->opts);
}
QLIST_FOREACH_SAFE(ngl, &dev->gpios, node, next) {
QLIST_REMOVE(ngl, node);
qemu_free_irqs(ngl->in);
g_free(ngl->name);
g_free(ngl);
/* ngl->out irqs are owned by the other end and should not be freed
* here
*/
}
}
static void device_class_base_init(ObjectClass *class, void *data)