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/*
* Greybus modules
*
* Copyright 2014 Google Inc.
*
* Released under the GPLv2 only.
*/
#include "greybus.h"
/* XXX This could be per-host device */
static DEFINE_SPINLOCK(gb_modules_lock);
static int gb_module_match_one_id(struct gb_module *gmod,
const struct greybus_module_id *id)
{
if ((id->match_flags & GREYBUS_DEVICE_ID_MATCH_VENDOR) &&
(id->vendor != gmod->vendor))
return 0;
if ((id->match_flags & GREYBUS_DEVICE_ID_MATCH_PRODUCT) &&
(id->product != gmod->product))
return 0;
if ((id->match_flags & GREYBUS_DEVICE_ID_MATCH_SERIAL) &&
(id->unique_id != gmod->unique_id))
return 0;
return 1;
}
const struct greybus_module_id *gb_module_match_id(struct gb_module *gmod,
const struct greybus_module_id *id)
{
if (id == NULL)
return NULL;
for (; id->vendor || id->product || id->unique_id ||
id->driver_info; id++) {
if (gb_module_match_one_id(gmod, id))
return id;
}
return NULL;
}
static void gb_module_interfaces_exit(struct gb_module *gmod)
{
struct gb_interface *interface;
struct gb_interface *next;
list_for_each_entry_safe(interface, next, &gmod->interfaces, links)
gb_interface_destroy(interface);
}
/*
* A Greybus module represents a user-replacable component on an Ara
* phone.
*
* Create a gb_module structure to represent a discovered module.
* The position within the Endo is encoded in the "module_id" argument.
* Returns a pointer to the new module or a null pointer if a
* failure occurs due to memory exhaustion.
*/
struct gb_module *gb_module_create(struct greybus_host_device *hd, u8 module_id)
{
struct gb_module *gmod;
gmod = kzalloc(sizeof(*gmod), GFP_KERNEL);
if (!gmod)
return NULL;
gmod->hd = hd; /* XXX refcount? */
gmod->module_id = module_id; /* XXX check for dups */
INIT_LIST_HEAD(&gmod->interfaces);
spin_lock_irq(&gb_modules_lock);
list_add_tail(&gmod->links, &hd->modules);
spin_unlock_irq(&gb_modules_lock);
return gmod;
}
/*
* Tear down a previously set up module.
*/
void gb_module_destroy(struct gb_module *gmod)
{
if (WARN_ON(!gmod))
return;
spin_lock_irq(&gb_modules_lock);
list_del(&gmod->links);
spin_unlock_irq(&gb_modules_lock);
gb_module_interfaces_exit(gmod);
/* XXX Do something with gmod->gb_tty */
put_device(&gmod->dev);
/* kfree(gmod->dev->name); */
kfree(gmod->product_string);
kfree(gmod->vendor_string);
/* kref_put(module->hd); */
kfree(gmod);
}
struct gb_module *gb_module_find(struct greybus_host_device *hd, u8 module_id)
{
struct gb_module *module;
list_for_each_entry(module, &hd->modules, links)
if (module->module_id == module_id)
return module;
return NULL;
}
void gb_module_interfaces_init(struct gb_module *gmod)
{
struct gb_interface *interface;
int ret = 0;
list_for_each_entry(interface, &gmod->interfaces, links) {
ret = gb_interface_connections_init(interface);
if (ret)
dev_err(gmod->hd->parent,
"module interface init error %d\n", ret);
}
}
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