2014-10-02 02:54:11 +00:00
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/*
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* Greybus modules
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*
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* Copyright 2014 Google Inc.
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*
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* Released under the GPLv2 only.
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*/
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#include "greybus.h"
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/* XXX This could be per-host device */
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static DEFINE_SPINLOCK(gb_modules_lock);
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static int gb_module_match_one_id(struct gb_module *gmod,
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const struct greybus_module_id *id)
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{
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if ((id->match_flags & GREYBUS_DEVICE_ID_MATCH_VENDOR) &&
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2014-10-02 02:54:16 +00:00
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(id->vendor != gmod->vendor))
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2014-10-02 02:54:11 +00:00
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return 0;
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if ((id->match_flags & GREYBUS_DEVICE_ID_MATCH_PRODUCT) &&
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2014-10-02 02:54:16 +00:00
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(id->product != gmod->product))
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2014-10-02 02:54:11 +00:00
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return 0;
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if ((id->match_flags & GREYBUS_DEVICE_ID_MATCH_SERIAL) &&
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2014-10-02 17:30:02 +00:00
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(id->unique_id != gmod->unique_id))
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2014-10-02 02:54:11 +00:00
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return 0;
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return 1;
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}
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const struct greybus_module_id *gb_module_match_id(struct gb_module *gmod,
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const struct greybus_module_id *id)
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{
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if (id == NULL)
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return NULL;
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2014-10-02 17:30:02 +00:00
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for (; id->vendor || id->product || id->unique_id ||
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2014-10-02 02:54:11 +00:00
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id->driver_info; id++) {
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if (gb_module_match_one_id(gmod, id))
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return id;
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}
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return NULL;
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}
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2014-10-21 04:01:04 +00:00
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static void gb_module_interfaces_exit(struct gb_module *gmod)
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{
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struct gb_interface *interface;
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struct gb_interface *next;
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list_for_each_entry_safe(interface, next, &gmod->interfaces, links)
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gb_interface_destroy(interface);
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}
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2014-10-02 02:54:11 +00:00
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/*
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* A Greybus module represents a user-replacable component on an Ara
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* phone.
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*
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* Create a gb_module structure to represent a discovered module.
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* The position within the Endo is encoded in the "module_id" argument.
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* Returns a pointer to the new module or a null pointer if a
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* failure occurs due to memory exhaustion.
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*/
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struct gb_module *gb_module_create(struct greybus_host_device *hd, u8 module_id)
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{
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2014-10-16 11:35:35 +00:00
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struct gb_module *gmod;
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2014-10-02 02:54:11 +00:00
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2014-10-16 11:35:35 +00:00
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gmod = kzalloc(sizeof(*gmod), GFP_KERNEL);
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if (!gmod)
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2014-10-02 02:54:11 +00:00
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return NULL;
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2014-10-16 11:35:35 +00:00
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gmod->hd = hd; /* XXX refcount? */
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2014-10-21 04:01:04 +00:00
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gmod->module_id = module_id; /* XXX check for dups */
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2014-10-16 11:35:35 +00:00
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INIT_LIST_HEAD(&gmod->interfaces);
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2014-10-02 02:54:11 +00:00
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spin_lock_irq(&gb_modules_lock);
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2014-10-16 11:35:35 +00:00
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list_add_tail(&gmod->links, &hd->modules);
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2014-10-02 02:54:11 +00:00
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spin_unlock_irq(&gb_modules_lock);
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2014-10-16 11:35:35 +00:00
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return gmod;
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2014-10-02 02:54:11 +00:00
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}
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/*
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* Tear down a previously set up module.
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*/
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2014-10-16 11:35:35 +00:00
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void gb_module_destroy(struct gb_module *gmod)
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2014-10-02 02:54:11 +00:00
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{
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2014-10-16 11:35:35 +00:00
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if (WARN_ON(!gmod))
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2014-10-02 02:54:11 +00:00
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return;
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spin_lock_irq(&gb_modules_lock);
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2014-10-16 11:35:35 +00:00
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list_del(&gmod->links);
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2014-10-02 02:54:11 +00:00
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spin_unlock_irq(&gb_modules_lock);
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2014-10-21 04:01:04 +00:00
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gb_module_interfaces_exit(gmod);
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/* XXX Do something with gmod->gb_tty */
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put_device(&gmod->dev);
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/* kfree(gmod->dev->name); */
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kfree(gmod->product_string);
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kfree(gmod->vendor_string);
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2014-10-02 02:54:11 +00:00
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/* kref_put(module->hd); */
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2014-10-21 04:01:04 +00:00
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2014-10-16 11:35:35 +00:00
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kfree(gmod);
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}
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void gb_module_interfaces_init(struct gb_module *gmod)
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{
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struct gb_interface *interface;
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int ret = 0;
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list_for_each_entry(interface, &gmod->interfaces, links) {
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ret = gb_interface_connections_init(interface);
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if (ret)
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dev_err(gmod->hd->parent,
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"module interface init error %d\n", ret);
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}
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2014-10-02 02:54:11 +00:00
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}
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