Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Greybus "Core" |
| 3 | * |
Alex Elder | 4441f47 | 2015-05-22 12:59:16 -0500 | [diff] [blame] | 4 | * Copyright 2014-2015 Google Inc. |
| 5 | * Copyright 2014-2015 Linaro Ltd. |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 6 | * |
| 7 | * Released under the GPLv2 only. |
| 8 | */ |
| 9 | |
| 10 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 11 | |
Bryan O'Donoghue | 5c8ad59 | 2015-09-18 16:38:45 +0100 | [diff] [blame] | 12 | #define CREATE_TRACE_POINTS |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 13 | #include "greybus.h" |
Bryan O'Donoghue | 5c8ad59 | 2015-09-18 16:38:45 +0100 | [diff] [blame] | 14 | #include "greybus_trace.h" |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 15 | |
Bryan O'Donoghue | 32b2b16 | 2015-09-22 18:06:38 -0700 | [diff] [blame] | 16 | EXPORT_TRACEPOINT_SYMBOL_GPL(gb_host_device_send); |
| 17 | EXPORT_TRACEPOINT_SYMBOL_GPL(gb_host_device_recv); |
| 18 | |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 19 | /* Allow greybus to be disabled at boot if needed */ |
| 20 | static bool nogreybus; |
| 21 | #ifdef MODULE |
| 22 | module_param(nogreybus, bool, 0444); |
| 23 | #else |
Viresh Kumar | 8597e6b | 2014-10-20 16:45:50 +0530 | [diff] [blame] | 24 | core_param(nogreybus, nogreybus, bool, 0444); |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 25 | #endif |
| 26 | int greybus_disabled(void) |
| 27 | { |
| 28 | return nogreybus; |
| 29 | } |
| 30 | EXPORT_SYMBOL_GPL(greybus_disabled); |
| 31 | |
Johan Hovold | 700001a | 2015-11-21 10:52:03 +0100 | [diff] [blame] | 32 | static int greybus_match_one_id(struct gb_bundle *bundle, |
| 33 | const struct greybus_bundle_id *id) |
| 34 | { |
| 35 | if ((id->match_flags & GREYBUS_ID_MATCH_VENDOR) && |
Johan Hovold | 9f59263 | 2015-11-25 15:58:56 +0100 | [diff] [blame] | 36 | (id->vendor != bundle->intf->vendor_id)) |
Johan Hovold | 700001a | 2015-11-21 10:52:03 +0100 | [diff] [blame] | 37 | return 0; |
| 38 | |
| 39 | if ((id->match_flags & GREYBUS_ID_MATCH_PRODUCT) && |
Johan Hovold | 9f59263 | 2015-11-25 15:58:56 +0100 | [diff] [blame] | 40 | (id->product != bundle->intf->product_id)) |
Johan Hovold | 700001a | 2015-11-21 10:52:03 +0100 | [diff] [blame] | 41 | return 0; |
| 42 | |
| 43 | if ((id->match_flags & GREYBUS_ID_MATCH_CLASS) && |
| 44 | (id->class != bundle->class)) |
| 45 | return 0; |
| 46 | |
| 47 | return 1; |
| 48 | } |
| 49 | |
| 50 | static const struct greybus_bundle_id * |
| 51 | greybus_match_id(struct gb_bundle *bundle, const struct greybus_bundle_id *id) |
| 52 | { |
| 53 | if (id == NULL) |
| 54 | return NULL; |
| 55 | |
| 56 | for (; id->vendor || id->product || id->class || id->driver_info; |
| 57 | id++) { |
| 58 | if (greybus_match_one_id(bundle, id)) |
| 59 | return id; |
| 60 | } |
| 61 | |
| 62 | return NULL; |
| 63 | } |
| 64 | |
Alex Elder | 778c69c | 2014-09-22 19:19:03 -0500 | [diff] [blame] | 65 | static int greybus_module_match(struct device *dev, struct device_driver *drv) |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 66 | { |
Viresh Kumar | 95bd99d | 2014-11-14 17:24:59 +0530 | [diff] [blame] | 67 | struct greybus_driver *driver = to_greybus_driver(drv); |
Johan Hovold | b77f932 | 2016-01-08 20:13:41 +0100 | [diff] [blame] | 68 | struct gb_bundle *bundle; |
Viresh Kumar | 9f5f30e712 | 2015-04-01 20:32:04 +0530 | [diff] [blame] | 69 | const struct greybus_bundle_id *id; |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 70 | |
Johan Hovold | b77f932 | 2016-01-08 20:13:41 +0100 | [diff] [blame] | 71 | if (!is_gb_bundle(dev)) |
| 72 | return 0; |
| 73 | |
| 74 | bundle = to_gb_bundle(dev); |
| 75 | |
Johan Hovold | 700001a | 2015-11-21 10:52:03 +0100 | [diff] [blame] | 76 | id = greybus_match_id(bundle, driver->id_table); |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 77 | if (id) |
| 78 | return 1; |
Viresh Kumar | 696e0cc | 2014-11-21 11:26:30 +0530 | [diff] [blame] | 79 | /* FIXME - Dynamic ids? */ |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 80 | return 0; |
| 81 | } |
| 82 | |
| 83 | static int greybus_uevent(struct device *dev, struct kobj_uevent_env *env) |
| 84 | { |
Johan Hovold | f0960d0 | 2015-12-03 19:18:02 +0100 | [diff] [blame] | 85 | struct gb_host_device *hd; |
Greg Kroah-Hartman | 4ab9b3c | 2014-12-19 14:56:31 -0800 | [diff] [blame] | 86 | struct gb_interface *intf = NULL; |
Greg Kroah-Hartman | 1db0a5f | 2014-12-12 17:10:17 -0500 | [diff] [blame] | 87 | struct gb_bundle *bundle = NULL; |
Johan Hovold | 88f7b96 | 2015-11-25 15:59:08 +0100 | [diff] [blame] | 88 | struct gb_svc *svc = NULL; |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 89 | |
Johan Hovold | 2adaefb | 2015-11-25 15:59:02 +0100 | [diff] [blame] | 90 | if (is_gb_host_device(dev)) { |
| 91 | hd = to_gb_host_device(dev); |
Greg Kroah-Hartman | df67155 | 2014-12-21 14:10:26 -0800 | [diff] [blame] | 92 | } else if (is_gb_interface(dev)) { |
Greg Kroah-Hartman | 4ab9b3c | 2014-12-19 14:56:31 -0800 | [diff] [blame] | 93 | intf = to_gb_interface(dev); |
Johan Hovold | f0960d0 | 2015-12-03 19:18:02 +0100 | [diff] [blame] | 94 | hd = intf->hd; |
Greg Kroah-Hartman | 1db0a5f | 2014-12-12 17:10:17 -0500 | [diff] [blame] | 95 | } else if (is_gb_bundle(dev)) { |
| 96 | bundle = to_gb_bundle(dev); |
Greg Kroah-Hartman | 4ab9b3c | 2014-12-19 14:56:31 -0800 | [diff] [blame] | 97 | intf = bundle->intf; |
Johan Hovold | f0960d0 | 2015-12-03 19:18:02 +0100 | [diff] [blame] | 98 | hd = intf->hd; |
Johan Hovold | 88f7b96 | 2015-11-25 15:59:08 +0100 | [diff] [blame] | 99 | } else if (is_gb_svc(dev)) { |
| 100 | svc = to_gb_svc(dev); |
Johan Hovold | f0960d0 | 2015-12-03 19:18:02 +0100 | [diff] [blame] | 101 | hd = svc->hd; |
Greg Kroah-Hartman | 0ac5a83 | 2014-11-15 12:12:16 -0800 | [diff] [blame] | 102 | } else { |
| 103 | dev_WARN(dev, "uevent for unknown greybus device \"type\"!\n"); |
| 104 | return -EINVAL; |
| 105 | } |
Greg Kroah-Hartman | f0f61b9 | 2014-10-24 17:34:46 +0800 | [diff] [blame] | 106 | |
Johan Hovold | f0960d0 | 2015-12-03 19:18:02 +0100 | [diff] [blame] | 107 | if (add_uevent_var(env, "BUS=%u", hd->bus_id)) |
| 108 | return -ENOMEM; |
| 109 | |
Johan Hovold | c5e6b05 | 2015-12-03 19:18:04 +0100 | [diff] [blame] | 110 | if (intf) { |
| 111 | if (add_uevent_var(env, "INTERFACE=%u", intf->interface_id)) |
| 112 | return -ENOMEM; |
Greg Kroah-Hartman | de14131 | 2016-01-11 19:24:54 -0800 | [diff] [blame] | 113 | if (add_uevent_var(env, "GREYBUS_ID=%04x/%04x", |
| 114 | (u16)(intf->vendor_id & 0xffff), |
| 115 | (u16)(intf->product_id & 0xffff))) |
| 116 | return -ENOMEM; |
Johan Hovold | c5e6b05 | 2015-12-03 19:18:04 +0100 | [diff] [blame] | 117 | } |
| 118 | |
Greg Kroah-Hartman | 1db0a5f | 2014-12-12 17:10:17 -0500 | [diff] [blame] | 119 | if (bundle) { |
Greg Kroah-Hartman | 0ac5a83 | 2014-11-15 12:12:16 -0800 | [diff] [blame] | 120 | // FIXME |
Greg Kroah-Hartman | 1db0a5f | 2014-12-12 17:10:17 -0500 | [diff] [blame] | 121 | // add a uevent that can "load" a bundle type |
Greg Kroah-Hartman | 0ac5a83 | 2014-11-15 12:12:16 -0800 | [diff] [blame] | 122 | // This is what we need to bind a driver to so use the info |
| 123 | // in gmod here as well |
Johan Hovold | c29c016 | 2015-12-04 10:44:24 +0100 | [diff] [blame] | 124 | |
| 125 | if (add_uevent_var(env, "BUNDLE=%u", bundle->id)) |
| 126 | return -ENOMEM; |
Greg Kroah-Hartman | 0ac5a83 | 2014-11-15 12:12:16 -0800 | [diff] [blame] | 127 | } |
| 128 | |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 129 | return 0; |
| 130 | } |
| 131 | |
Greg Kroah-Hartman | f0f61b9 | 2014-10-24 17:34:46 +0800 | [diff] [blame] | 132 | struct bus_type greybus_bus_type = { |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 133 | .name = "greybus", |
Alex Elder | 778c69c | 2014-09-22 19:19:03 -0500 | [diff] [blame] | 134 | .match = greybus_module_match, |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 135 | .uevent = greybus_uevent, |
| 136 | }; |
| 137 | |
| 138 | static int greybus_probe(struct device *dev) |
| 139 | { |
| 140 | struct greybus_driver *driver = to_greybus_driver(dev->driver); |
Viresh Kumar | 9f5f30e712 | 2015-04-01 20:32:04 +0530 | [diff] [blame] | 141 | struct gb_bundle *bundle = to_gb_bundle(dev); |
| 142 | const struct greybus_bundle_id *id; |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 143 | int retval; |
| 144 | |
| 145 | /* match id */ |
Johan Hovold | 700001a | 2015-11-21 10:52:03 +0100 | [diff] [blame] | 146 | id = greybus_match_id(bundle, driver->id_table); |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 147 | if (!id) |
| 148 | return -ENODEV; |
| 149 | |
Viresh Kumar | 9f5f30e712 | 2015-04-01 20:32:04 +0530 | [diff] [blame] | 150 | retval = driver->probe(bundle, id); |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 151 | if (retval) |
| 152 | return retval; |
| 153 | |
| 154 | return 0; |
| 155 | } |
| 156 | |
| 157 | static int greybus_remove(struct device *dev) |
| 158 | { |
| 159 | struct greybus_driver *driver = to_greybus_driver(dev->driver); |
Viresh Kumar | 9f5f30e712 | 2015-04-01 20:32:04 +0530 | [diff] [blame] | 160 | struct gb_bundle *bundle = to_gb_bundle(dev); |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 161 | |
Viresh Kumar | 9f5f30e712 | 2015-04-01 20:32:04 +0530 | [diff] [blame] | 162 | driver->disconnect(bundle); |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 163 | return 0; |
| 164 | } |
| 165 | |
| 166 | int greybus_register_driver(struct greybus_driver *driver, struct module *owner, |
| 167 | const char *mod_name) |
| 168 | { |
| 169 | int retval; |
| 170 | |
| 171 | if (greybus_disabled()) |
| 172 | return -ENODEV; |
| 173 | |
Johan Hovold | 3c48d1b | 2016-01-08 20:13:42 +0100 | [diff] [blame] | 174 | driver->driver.bus = &greybus_bus_type; |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 175 | driver->driver.name = driver->name; |
| 176 | driver->driver.probe = greybus_probe; |
| 177 | driver->driver.remove = greybus_remove; |
| 178 | driver->driver.owner = owner; |
| 179 | driver->driver.mod_name = mod_name; |
| 180 | |
| 181 | retval = driver_register(&driver->driver); |
| 182 | if (retval) |
| 183 | return retval; |
| 184 | |
| 185 | pr_info("registered new driver %s\n", driver->name); |
| 186 | return 0; |
| 187 | } |
| 188 | EXPORT_SYMBOL_GPL(greybus_register_driver); |
| 189 | |
Alex Elder | fd1c2e5 | 2015-06-08 12:05:13 -0500 | [diff] [blame] | 190 | void greybus_deregister_driver(struct greybus_driver *driver) |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 191 | { |
| 192 | driver_unregister(&driver->driver); |
| 193 | } |
Alex Elder | fd1c2e5 | 2015-06-08 12:05:13 -0500 | [diff] [blame] | 194 | EXPORT_SYMBOL_GPL(greybus_deregister_driver); |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 195 | |
Greg Kroah-Hartman | 503c1cd | 2014-08-30 16:21:03 -0700 | [diff] [blame] | 196 | static int __init gb_init(void) |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 197 | { |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 198 | int retval; |
| 199 | |
Viresh Kumar | 337b068 | 2015-03-20 20:29:13 +0530 | [diff] [blame] | 200 | if (greybus_disabled()) |
| 201 | return -ENODEV; |
| 202 | |
Alex Elder | fb690ca | 2015-06-13 11:02:09 -0500 | [diff] [blame] | 203 | BUILD_BUG_ON(CPORT_ID_MAX >= (long)CPORT_ID_BAD); |
Alex Elder | 1bb3c72 | 2014-10-02 12:30:03 -0500 | [diff] [blame] | 204 | |
Greg Kroah-Hartman | 48f7047 | 2015-03-27 11:38:06 +0100 | [diff] [blame] | 205 | gb_debugfs_init(); |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 206 | |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 207 | retval = bus_register(&greybus_bus_type); |
Greg Kroah-Hartman | 168db1c | 2014-09-13 16:15:52 -0700 | [diff] [blame] | 208 | if (retval) { |
Alex Elder | f35ab90 | 2015-06-09 17:42:51 -0500 | [diff] [blame] | 209 | pr_err("bus_register failed (%d)\n", retval); |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 210 | goto error_bus; |
Greg Kroah-Hartman | 168db1c | 2014-09-13 16:15:52 -0700 | [diff] [blame] | 211 | } |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 212 | |
Johan Hovold | 2adaefb | 2015-11-25 15:59:02 +0100 | [diff] [blame] | 213 | retval = gb_hd_init(); |
| 214 | if (retval) { |
| 215 | pr_err("gb_hd_init failed (%d)\n", retval); |
| 216 | goto error_hd; |
| 217 | } |
| 218 | |
Alex Elder | 2eb585f | 2014-10-16 06:35:34 -0500 | [diff] [blame] | 219 | retval = gb_operation_init(); |
| 220 | if (retval) { |
Alex Elder | f35ab90 | 2015-06-09 17:42:51 -0500 | [diff] [blame] | 221 | pr_err("gb_operation_init failed (%d)\n", retval); |
Alex Elder | 2eb585f | 2014-10-16 06:35:34 -0500 | [diff] [blame] | 222 | goto error_operation; |
| 223 | } |
| 224 | |
Viresh Kumar | cdee4f7 | 2015-06-22 16:42:26 +0530 | [diff] [blame] | 225 | retval = gb_control_protocol_init(); |
| 226 | if (retval) { |
| 227 | pr_err("gb_control_protocol_init failed\n"); |
| 228 | goto error_control; |
| 229 | } |
| 230 | |
Viresh Kumar | ab69c4c | 2015-07-03 17:00:29 +0530 | [diff] [blame] | 231 | retval = gb_svc_protocol_init(); |
| 232 | if (retval) { |
| 233 | pr_err("gb_svc_protocol_init failed\n"); |
| 234 | goto error_svc; |
| 235 | } |
| 236 | |
Viresh Kumar | 90f1b61 | 2015-08-12 09:19:33 +0530 | [diff] [blame] | 237 | retval = gb_firmware_protocol_init(); |
| 238 | if (retval) { |
| 239 | pr_err("gb_firmware_protocol_init failed\n"); |
| 240 | goto error_firmware; |
| 241 | } |
| 242 | |
Alex Elder | 19d03de | 2014-11-05 16:12:53 -0600 | [diff] [blame] | 243 | return 0; /* Success */ |
| 244 | |
Viresh Kumar | 90f1b61 | 2015-08-12 09:19:33 +0530 | [diff] [blame] | 245 | error_firmware: |
| 246 | gb_svc_protocol_exit(); |
Viresh Kumar | ab69c4c | 2015-07-03 17:00:29 +0530 | [diff] [blame] | 247 | error_svc: |
| 248 | gb_control_protocol_exit(); |
Viresh Kumar | cdee4f7 | 2015-06-22 16:42:26 +0530 | [diff] [blame] | 249 | error_control: |
Alex Elder | f35ab90 | 2015-06-09 17:42:51 -0500 | [diff] [blame] | 250 | gb_operation_exit(); |
Alex Elder | 2eb585f | 2014-10-16 06:35:34 -0500 | [diff] [blame] | 251 | error_operation: |
Johan Hovold | 2adaefb | 2015-11-25 15:59:02 +0100 | [diff] [blame] | 252 | gb_hd_exit(); |
| 253 | error_hd: |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 254 | bus_unregister(&greybus_bus_type); |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 255 | error_bus: |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 256 | gb_debugfs_cleanup(); |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 257 | |
| 258 | return retval; |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 259 | } |
Viresh Kumar | d71aaf2 | 2015-03-19 17:02:49 +0530 | [diff] [blame] | 260 | module_init(gb_init); |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 261 | |
Greg Kroah-Hartman | 503c1cd | 2014-08-30 16:21:03 -0700 | [diff] [blame] | 262 | static void __exit gb_exit(void) |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 263 | { |
Viresh Kumar | 90f1b61 | 2015-08-12 09:19:33 +0530 | [diff] [blame] | 264 | gb_firmware_protocol_exit(); |
Viresh Kumar | ab69c4c | 2015-07-03 17:00:29 +0530 | [diff] [blame] | 265 | gb_svc_protocol_exit(); |
Viresh Kumar | cdee4f7 | 2015-06-22 16:42:26 +0530 | [diff] [blame] | 266 | gb_control_protocol_exit(); |
Alex Elder | 2eb585f | 2014-10-16 06:35:34 -0500 | [diff] [blame] | 267 | gb_operation_exit(); |
Johan Hovold | 2adaefb | 2015-11-25 15:59:02 +0100 | [diff] [blame] | 268 | gb_hd_exit(); |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 269 | bus_unregister(&greybus_bus_type); |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 270 | gb_debugfs_cleanup(); |
Bryan O'Donoghue | 5c8ad59 | 2015-09-18 16:38:45 +0100 | [diff] [blame] | 271 | tracepoint_synchronize_unregister(); |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 272 | } |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 273 | module_exit(gb_exit); |
Greg Kroah-Hartman | 6cf42a4 | 2015-04-13 19:51:33 +0200 | [diff] [blame] | 274 | MODULE_LICENSE("GPL v2"); |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 275 | MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>"); |