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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
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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)

24
include/hw/qdev-core.h
View file

@ -131,6 +131,17 @@ typedef struct DeviceClass {
const char *bus_type;
} DeviceClass;
typedef struct NamedGPIOList NamedGPIOList;
struct NamedGPIOList {
char *name;
qemu_irq *in;
int num_in;
qemu_irq *out;
int num_out;
QLIST_ENTRY(NamedGPIOList) node;
};
/**
* DeviceState:
* @realized: Indicates whether the device has been fully constructed.
@ -148,10 +159,7 @@ struct DeviceState {
QemuOpts *opts;
int hotplugged;
BusState *parent_bus;
int num_gpio_out;
qemu_irq *gpio_out;
int num_gpio_in;
qemu_irq *gpio_in;
QLIST_HEAD(, NamedGPIOList) gpios;
QLIST_HEAD(, BusState) child_bus;
int num_child_bus;
int instance_id_alias;
@ -252,7 +260,11 @@ void qdev_machine_creation_done(void);
bool qdev_machine_modified(void);
qemu_irq qdev_get_gpio_in(DeviceState *dev, int n);
qemu_irq qdev_get_gpio_in_named(DeviceState *dev, const char *name, int n);
void qdev_connect_gpio_out(DeviceState *dev, int n, qemu_irq pin);
void qdev_connect_gpio_out_named(DeviceState *dev, const char *name, int n,
qemu_irq pin);
BusState *qdev_get_child_bus(DeviceState *dev, const char *name);
@ -262,6 +274,10 @@ BusState *qdev_get_child_bus(DeviceState *dev, const char *name);
/* GPIO inputs also double as IRQ sinks. */
void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n);
void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n);
void qdev_init_gpio_in_named(DeviceState *dev, qemu_irq_handler handler,
const char *name, int n);
void qdev_init_gpio_out_named(DeviceState *dev, qemu_irq *pins,
const char *name, int n);
BusState *qdev_get_parent_bus(DeviceState *dev);

16
qdev-monitor.c
View file

@ -613,14 +613,20 @@ static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
{
ObjectClass *class;
BusState *child;
NamedGPIOList *ngl;
qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
dev->id ? dev->id : "");
indent += 2;
if (dev->num_gpio_in) {
qdev_printf("gpio-in %d\n", dev->num_gpio_in);
}
if (dev->num_gpio_out) {
qdev_printf("gpio-out %d\n", dev->num_gpio_out);
QLIST_FOREACH(ngl, &dev->gpios, node) {
if (ngl->num_in) {
qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
ngl->num_in);
}
if (ngl->num_out) {
qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
ngl->num_out);
}
}
class = object_get_class(OBJECT(dev));
do {

19
qtest.c
View file

@ -233,7 +233,8 @@ static void qtest_process_command(CharDriverState *chr, gchar **words)
g_assert(command);
if (strcmp(words[0], "irq_intercept_out") == 0
|| strcmp(words[0], "irq_intercept_in") == 0) {
DeviceState *dev;
DeviceState *dev;
NamedGPIOList *ngl;
g_assert(words[1]);
dev = DEVICE(object_resolve_path(words[1], NULL));
@ -253,10 +254,18 @@ static void qtest_process_command(CharDriverState *chr, gchar **words)
return;
}
if (words[0][14] == 'o') {
qemu_irq_intercept_out(&dev->gpio_out, qtest_irq_handler, dev->num_gpio_out);
} else {
qemu_irq_intercept_in(dev->gpio_in, qtest_irq_handler, dev->num_gpio_in);
QLIST_FOREACH(ngl, &dev->gpios, node) {
/* We don't support intercept of named GPIOs yet */
if (ngl->name) {
continue;
}
if (words[0][14] == 'o') {
qemu_irq_intercept_out(&ngl->out, qtest_irq_handler,
ngl->num_out);
} else {
qemu_irq_intercept_in(ngl->in, qtest_irq_handler,
ngl->num_in);
}
}
irq_intercept_dev = dev;
qtest_send_prefix(chr);