| /* |
| * 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; |
| } |
| |
| /* |
| * 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; |
| 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; |
| |
| kfree(gmod->product_string); |
| kfree(gmod->vendor_string); |
| |
| spin_lock_irq(&gb_modules_lock); |
| list_del(&gmod->links); |
| spin_unlock_irq(&gb_modules_lock); |
| |
| /* kref_put(module->hd); */ |
| |
| kfree(gmod); |
| } |
| |
| 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); |
| } |
| } |