Alex Elder | e1e9dbd | 2014-10-01 21:54:11 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Greybus modules |
| 3 | * |
| 4 | * Copyright 2014 Google Inc. |
| 5 | * |
| 6 | * Released under the GPLv2 only. |
| 7 | */ |
| 8 | |
| 9 | #include "greybus.h" |
| 10 | |
| 11 | /* XXX This could be per-host device */ |
| 12 | static DEFINE_SPINLOCK(gb_modules_lock); |
| 13 | |
| 14 | static int gb_module_match_one_id(struct gb_module *gmod, |
| 15 | const struct greybus_module_id *id) |
| 16 | { |
Alex Elder | e1e9dbd | 2014-10-01 21:54:11 -0500 | [diff] [blame] | 17 | if ((id->match_flags & GREYBUS_DEVICE_ID_MATCH_VENDOR) && |
Alex Elder | b09c94a | 2014-10-01 21:54:16 -0500 | [diff] [blame] | 18 | (id->vendor != gmod->vendor)) |
Alex Elder | e1e9dbd | 2014-10-01 21:54:11 -0500 | [diff] [blame] | 19 | return 0; |
| 20 | |
| 21 | if ((id->match_flags & GREYBUS_DEVICE_ID_MATCH_PRODUCT) && |
Alex Elder | b09c94a | 2014-10-01 21:54:16 -0500 | [diff] [blame] | 22 | (id->product != gmod->product)) |
Alex Elder | e1e9dbd | 2014-10-01 21:54:11 -0500 | [diff] [blame] | 23 | return 0; |
| 24 | |
| 25 | if ((id->match_flags & GREYBUS_DEVICE_ID_MATCH_SERIAL) && |
Alex Elder | 63cc932 | 2014-10-02 12:30:02 -0500 | [diff] [blame] | 26 | (id->unique_id != gmod->unique_id)) |
Alex Elder | e1e9dbd | 2014-10-01 21:54:11 -0500 | [diff] [blame] | 27 | return 0; |
| 28 | |
| 29 | return 1; |
| 30 | } |
| 31 | |
| 32 | const struct greybus_module_id *gb_module_match_id(struct gb_module *gmod, |
| 33 | const struct greybus_module_id *id) |
| 34 | { |
| 35 | if (id == NULL) |
| 36 | return NULL; |
| 37 | |
Alex Elder | 63cc932 | 2014-10-02 12:30:02 -0500 | [diff] [blame] | 38 | for (; id->vendor || id->product || id->unique_id || |
Alex Elder | e1e9dbd | 2014-10-01 21:54:11 -0500 | [diff] [blame] | 39 | id->driver_info; id++) { |
| 40 | if (gb_module_match_one_id(gmod, id)) |
| 41 | return id; |
| 42 | } |
| 43 | |
| 44 | return NULL; |
| 45 | } |
| 46 | |
| 47 | /* |
| 48 | * A Greybus module represents a user-replacable component on an Ara |
| 49 | * phone. |
| 50 | * |
| 51 | * Create a gb_module structure to represent a discovered module. |
| 52 | * The position within the Endo is encoded in the "module_id" argument. |
| 53 | * Returns a pointer to the new module or a null pointer if a |
| 54 | * failure occurs due to memory exhaustion. |
| 55 | */ |
| 56 | struct gb_module *gb_module_create(struct greybus_host_device *hd, u8 module_id) |
| 57 | { |
Alex Elder | 574341c | 2014-10-16 06:35:35 -0500 | [diff] [blame] | 58 | struct gb_module *gmod; |
Alex Elder | e1e9dbd | 2014-10-01 21:54:11 -0500 | [diff] [blame] | 59 | |
Alex Elder | 574341c | 2014-10-16 06:35:35 -0500 | [diff] [blame] | 60 | gmod = kzalloc(sizeof(*gmod), GFP_KERNEL); |
| 61 | if (!gmod) |
Alex Elder | e1e9dbd | 2014-10-01 21:54:11 -0500 | [diff] [blame] | 62 | return NULL; |
| 63 | |
Alex Elder | 574341c | 2014-10-16 06:35:35 -0500 | [diff] [blame] | 64 | gmod->hd = hd; /* XXX refcount? */ |
| 65 | gmod->module_id = module_id; |
| 66 | INIT_LIST_HEAD(&gmod->interfaces); |
Alex Elder | e1e9dbd | 2014-10-01 21:54:11 -0500 | [diff] [blame] | 67 | |
| 68 | spin_lock_irq(&gb_modules_lock); |
Alex Elder | 574341c | 2014-10-16 06:35:35 -0500 | [diff] [blame] | 69 | list_add_tail(&gmod->links, &hd->modules); |
Alex Elder | e1e9dbd | 2014-10-01 21:54:11 -0500 | [diff] [blame] | 70 | spin_unlock_irq(&gb_modules_lock); |
| 71 | |
Alex Elder | 574341c | 2014-10-16 06:35:35 -0500 | [diff] [blame] | 72 | return gmod; |
Alex Elder | e1e9dbd | 2014-10-01 21:54:11 -0500 | [diff] [blame] | 73 | } |
| 74 | |
| 75 | /* |
| 76 | * Tear down a previously set up module. |
| 77 | */ |
Alex Elder | 574341c | 2014-10-16 06:35:35 -0500 | [diff] [blame] | 78 | void gb_module_destroy(struct gb_module *gmod) |
Alex Elder | e1e9dbd | 2014-10-01 21:54:11 -0500 | [diff] [blame] | 79 | { |
Alex Elder | 574341c | 2014-10-16 06:35:35 -0500 | [diff] [blame] | 80 | if (WARN_ON(!gmod)) |
Alex Elder | e1e9dbd | 2014-10-01 21:54:11 -0500 | [diff] [blame] | 81 | return; |
| 82 | |
Alex Elder | 574341c | 2014-10-16 06:35:35 -0500 | [diff] [blame] | 83 | kfree(gmod->product_string); |
| 84 | kfree(gmod->vendor_string); |
Alex Elder | b09c94a | 2014-10-01 21:54:16 -0500 | [diff] [blame] | 85 | |
Alex Elder | e1e9dbd | 2014-10-01 21:54:11 -0500 | [diff] [blame] | 86 | spin_lock_irq(&gb_modules_lock); |
Alex Elder | 574341c | 2014-10-16 06:35:35 -0500 | [diff] [blame] | 87 | list_del(&gmod->links); |
Alex Elder | e1e9dbd | 2014-10-01 21:54:11 -0500 | [diff] [blame] | 88 | spin_unlock_irq(&gb_modules_lock); |
| 89 | |
| 90 | /* kref_put(module->hd); */ |
| 91 | |
Alex Elder | 574341c | 2014-10-16 06:35:35 -0500 | [diff] [blame] | 92 | kfree(gmod); |
| 93 | } |
| 94 | |
| 95 | void gb_module_interfaces_init(struct gb_module *gmod) |
| 96 | { |
| 97 | struct gb_interface *interface; |
| 98 | int ret = 0; |
| 99 | |
| 100 | list_for_each_entry(interface, &gmod->interfaces, links) { |
| 101 | ret = gb_interface_connections_init(interface); |
| 102 | if (ret) |
| 103 | dev_err(gmod->hd->parent, |
| 104 | "module interface init error %d\n", ret); |
| 105 | } |
Alex Elder | e1e9dbd | 2014-10-01 21:54:11 -0500 | [diff] [blame] | 106 | } |