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1da177e4 LT |
1 | #ifndef __LINUX_USB_H |
2 | #define __LINUX_USB_H | |
3 | ||
4 | #include <linux/mod_devicetable.h> | |
5f848137 | 5 | #include <linux/usb/ch9.h> |
1da177e4 LT |
6 | |
7 | #define USB_MAJOR 180 | |
fbf82fd2 | 8 | #define USB_DEVICE_MAJOR 189 |
1da177e4 LT |
9 | |
10 | ||
11 | #ifdef __KERNEL__ | |
12 | ||
1da177e4 LT |
13 | #include <linux/errno.h> /* for -ENODEV */ |
14 | #include <linux/delay.h> /* for mdelay() */ | |
15 | #include <linux/interrupt.h> /* for in_interrupt() */ | |
16 | #include <linux/list.h> /* for struct list_head */ | |
17 | #include <linux/kref.h> /* for struct kref */ | |
18 | #include <linux/device.h> /* for struct device */ | |
19 | #include <linux/fs.h> /* for struct file_operations */ | |
20 | #include <linux/completion.h> /* for struct completion */ | |
21 | #include <linux/sched.h> /* for current && schedule_timeout */ | |
645daaab | 22 | #include <linux/mutex.h> /* for struct mutex */ |
1da177e4 LT |
23 | |
24 | struct usb_device; | |
25 | struct usb_driver; | |
26 | ||
27 | /*-------------------------------------------------------------------------*/ | |
28 | ||
29 | /* | |
30 | * Host-side wrappers for standard USB descriptors ... these are parsed | |
31 | * from the data provided by devices. Parsing turns them from a flat | |
32 | * sequence of descriptors into a hierarchy: | |
33 | * | |
34 | * - devices have one (usually) or more configs; | |
35 | * - configs have one (often) or more interfaces; | |
36 | * - interfaces have one (usually) or more settings; | |
37 | * - each interface setting has zero or (usually) more endpoints. | |
38 | * | |
39 | * And there might be other descriptors mixed in with those. | |
40 | * | |
41 | * Devices may also have class-specific or vendor-specific descriptors. | |
42 | */ | |
43 | ||
9bde7497 GKH |
44 | struct ep_device; |
45 | ||
1da177e4 LT |
46 | /** |
47 | * struct usb_host_endpoint - host-side endpoint descriptor and queue | |
48 | * @desc: descriptor for this endpoint, wMaxPacketSize in native byteorder | |
49 | * @urb_list: urbs queued to this endpoint; maintained by usbcore | |
50 | * @hcpriv: for use by HCD; typically holds hardware dma queue head (QH) | |
51 | * with one or more transfer descriptors (TDs) per urb | |
7fac9a33 | 52 | * @ep_dev: ep_device for sysfs info |
1da177e4 LT |
53 | * @extra: descriptors following this endpoint in the configuration |
54 | * @extralen: how many bytes of "extra" are valid | |
bdd016ba | 55 | * @enabled: URBs may be submitted to this endpoint |
1da177e4 LT |
56 | * |
57 | * USB requests are always queued to a given endpoint, identified by a | |
58 | * descriptor within an active interface in a given USB configuration. | |
59 | */ | |
60 | struct usb_host_endpoint { | |
61 | struct usb_endpoint_descriptor desc; | |
62 | struct list_head urb_list; | |
63 | void *hcpriv; | |
9bde7497 | 64 | struct ep_device *ep_dev; /* For sysfs info */ |
1da177e4 LT |
65 | |
66 | unsigned char *extra; /* Extra descriptors */ | |
67 | int extralen; | |
bdd016ba | 68 | int enabled; |
1da177e4 LT |
69 | }; |
70 | ||
71 | /* host-side wrapper for one interface setting's parsed descriptors */ | |
72 | struct usb_host_interface { | |
73 | struct usb_interface_descriptor desc; | |
74 | ||
75 | /* array of desc.bNumEndpoint endpoints associated with this | |
76 | * interface setting. these will be in no particular order. | |
77 | */ | |
78 | struct usb_host_endpoint *endpoint; | |
79 | ||
80 | char *string; /* iInterface string, if present */ | |
81 | unsigned char *extra; /* Extra descriptors */ | |
82 | int extralen; | |
83 | }; | |
84 | ||
85 | enum usb_interface_condition { | |
86 | USB_INTERFACE_UNBOUND = 0, | |
87 | USB_INTERFACE_BINDING, | |
88 | USB_INTERFACE_BOUND, | |
89 | USB_INTERFACE_UNBINDING, | |
90 | }; | |
91 | ||
92 | /** | |
93 | * struct usb_interface - what usb device drivers talk to | |
94 | * @altsetting: array of interface structures, one for each alternate | |
95 | * setting that may be selected. Each one includes a set of | |
96 | * endpoint configurations. They will be in no particular order. | |
97 | * @num_altsetting: number of altsettings defined. | |
98 | * @cur_altsetting: the current altsetting. | |
3f423787 | 99 | * @intf_assoc: interface association descriptor |
1da177e4 LT |
100 | * @driver: the USB driver that is bound to this interface. |
101 | * @minor: the minor number assigned to this interface, if this | |
102 | * interface is bound to a driver that uses the USB major number. | |
103 | * If this interface does not use the USB major, this field should | |
104 | * be unused. The driver should set this value in the probe() | |
105 | * function of the driver, after it has been assigned a minor | |
106 | * number from the USB core by calling usb_register_dev(). | |
107 | * @condition: binding state of the interface: not bound, binding | |
108 | * (in probe()), bound to a driver, or unbinding (in disconnect()) | |
4d064c08 | 109 | * @is_active: flag set when the interface is bound and not suspended. |
f88ed90d | 110 | * @sysfs_files_created: sysfs attributes exist |
645daaab AS |
111 | * @needs_remote_wakeup: flag set when the driver requires remote-wakeup |
112 | * capability during autosuspend. | |
1da177e4 | 113 | * @dev: driver model's view of this device |
0873c764 GKH |
114 | * @usb_dev: if an interface is bound to the USB major, this will point |
115 | * to the sysfs representation for that device. | |
645daaab AS |
116 | * @pm_usage_cnt: PM usage counter for this interface; autosuspend is not |
117 | * allowed unless the counter is 0. | |
1da177e4 LT |
118 | * |
119 | * USB device drivers attach to interfaces on a physical device. Each | |
120 | * interface encapsulates a single high level function, such as feeding | |
121 | * an audio stream to a speaker or reporting a change in a volume control. | |
122 | * Many USB devices only have one interface. The protocol used to talk to | |
123 | * an interface's endpoints can be defined in a usb "class" specification, | |
124 | * or by a product's vendor. The (default) control endpoint is part of | |
125 | * every interface, but is never listed among the interface's descriptors. | |
126 | * | |
127 | * The driver that is bound to the interface can use standard driver model | |
128 | * calls such as dev_get_drvdata() on the dev member of this structure. | |
129 | * | |
130 | * Each interface may have alternate settings. The initial configuration | |
131 | * of a device sets altsetting 0, but the device driver can change | |
132 | * that setting using usb_set_interface(). Alternate settings are often | |
59c51591 | 133 | * used to control the use of periodic endpoints, such as by having |
1da177e4 LT |
134 | * different endpoints use different amounts of reserved USB bandwidth. |
135 | * All standards-conformant USB devices that use isochronous endpoints | |
136 | * will use them in non-default settings. | |
137 | * | |
138 | * The USB specification says that alternate setting numbers must run from | |
139 | * 0 to one less than the total number of alternate settings. But some | |
140 | * devices manage to mess this up, and the structures aren't necessarily | |
141 | * stored in numerical order anyhow. Use usb_altnum_to_altsetting() to | |
142 | * look up an alternate setting in the altsetting array based on its number. | |
143 | */ | |
144 | struct usb_interface { | |
145 | /* array of alternate settings for this interface, | |
146 | * stored in no particular order */ | |
147 | struct usb_host_interface *altsetting; | |
148 | ||
149 | struct usb_host_interface *cur_altsetting; /* the currently | |
150 | * active alternate setting */ | |
151 | unsigned num_altsetting; /* number of alternate settings */ | |
152 | ||
165fe97e CN |
153 | /* If there is an interface association descriptor then it will list |
154 | * the associated interfaces */ | |
155 | struct usb_interface_assoc_descriptor *intf_assoc; | |
156 | ||
b724ae77 AS |
157 | int minor; /* minor number this interface is |
158 | * bound to */ | |
1da177e4 | 159 | enum usb_interface_condition condition; /* state of binding */ |
4d064c08 | 160 | unsigned is_active:1; /* the interface is not suspended */ |
7e61559f | 161 | unsigned sysfs_files_created:1; /* the sysfs attributes exist */ |
645daaab | 162 | unsigned needs_remote_wakeup:1; /* driver requires remote wakeup */ |
4d064c08 | 163 | |
1da177e4 | 164 | struct device dev; /* interface specific device info */ |
969ab2ee | 165 | struct device *usb_dev; |
645daaab | 166 | int pm_usage_cnt; /* usage counter for autosuspend */ |
1da177e4 LT |
167 | }; |
168 | #define to_usb_interface(d) container_of(d, struct usb_interface, dev) | |
169 | #define interface_to_usbdev(intf) \ | |
170 | container_of(intf->dev.parent, struct usb_device, dev) | |
171 | ||
969ab2ee | 172 | static inline void *usb_get_intfdata(struct usb_interface *intf) |
1da177e4 | 173 | { |
969ab2ee | 174 | return dev_get_drvdata(&intf->dev); |
1da177e4 LT |
175 | } |
176 | ||
969ab2ee | 177 | static inline void usb_set_intfdata(struct usb_interface *intf, void *data) |
1da177e4 LT |
178 | { |
179 | dev_set_drvdata(&intf->dev, data); | |
180 | } | |
181 | ||
182 | struct usb_interface *usb_get_intf(struct usb_interface *intf); | |
183 | void usb_put_intf(struct usb_interface *intf); | |
184 | ||
185 | /* this maximum is arbitrary */ | |
186 | #define USB_MAXINTERFACES 32 | |
165fe97e | 187 | #define USB_MAXIADS USB_MAXINTERFACES/2 |
1da177e4 LT |
188 | |
189 | /** | |
190 | * struct usb_interface_cache - long-term representation of a device interface | |
191 | * @num_altsetting: number of altsettings defined. | |
192 | * @ref: reference counter. | |
193 | * @altsetting: variable-length array of interface structures, one for | |
194 | * each alternate setting that may be selected. Each one includes a | |
195 | * set of endpoint configurations. They will be in no particular order. | |
196 | * | |
197 | * These structures persist for the lifetime of a usb_device, unlike | |
198 | * struct usb_interface (which persists only as long as its configuration | |
199 | * is installed). The altsetting arrays can be accessed through these | |
200 | * structures at any time, permitting comparison of configurations and | |
201 | * providing support for the /proc/bus/usb/devices pseudo-file. | |
202 | */ | |
203 | struct usb_interface_cache { | |
204 | unsigned num_altsetting; /* number of alternate settings */ | |
205 | struct kref ref; /* reference counter */ | |
206 | ||
207 | /* variable-length array of alternate settings for this interface, | |
208 | * stored in no particular order */ | |
209 | struct usb_host_interface altsetting[0]; | |
210 | }; | |
211 | #define ref_to_usb_interface_cache(r) \ | |
212 | container_of(r, struct usb_interface_cache, ref) | |
213 | #define altsetting_to_usb_interface_cache(a) \ | |
214 | container_of(a, struct usb_interface_cache, altsetting[0]) | |
215 | ||
216 | /** | |
217 | * struct usb_host_config - representation of a device's configuration | |
218 | * @desc: the device's configuration descriptor. | |
219 | * @string: pointer to the cached version of the iConfiguration string, if | |
220 | * present for this configuration. | |
3f423787 | 221 | * @intf_assoc: list of any interface association descriptors in this config |
1da177e4 LT |
222 | * @interface: array of pointers to usb_interface structures, one for each |
223 | * interface in the configuration. The number of interfaces is stored | |
224 | * in desc.bNumInterfaces. These pointers are valid only while the | |
225 | * the configuration is active. | |
226 | * @intf_cache: array of pointers to usb_interface_cache structures, one | |
227 | * for each interface in the configuration. These structures exist | |
228 | * for the entire life of the device. | |
229 | * @extra: pointer to buffer containing all extra descriptors associated | |
230 | * with this configuration (those preceding the first interface | |
231 | * descriptor). | |
232 | * @extralen: length of the extra descriptors buffer. | |
233 | * | |
234 | * USB devices may have multiple configurations, but only one can be active | |
235 | * at any time. Each encapsulates a different operational environment; | |
236 | * for example, a dual-speed device would have separate configurations for | |
237 | * full-speed and high-speed operation. The number of configurations | |
238 | * available is stored in the device descriptor as bNumConfigurations. | |
239 | * | |
240 | * A configuration can contain multiple interfaces. Each corresponds to | |
241 | * a different function of the USB device, and all are available whenever | |
242 | * the configuration is active. The USB standard says that interfaces | |
243 | * are supposed to be numbered from 0 to desc.bNumInterfaces-1, but a lot | |
244 | * of devices get this wrong. In addition, the interface array is not | |
245 | * guaranteed to be sorted in numerical order. Use usb_ifnum_to_if() to | |
246 | * look up an interface entry based on its number. | |
247 | * | |
248 | * Device drivers should not attempt to activate configurations. The choice | |
249 | * of which configuration to install is a policy decision based on such | |
250 | * considerations as available power, functionality provided, and the user's | |
312c004d | 251 | * desires (expressed through userspace tools). However, drivers can call |
1da177e4 LT |
252 | * usb_reset_configuration() to reinitialize the current configuration and |
253 | * all its interfaces. | |
254 | */ | |
255 | struct usb_host_config { | |
256 | struct usb_config_descriptor desc; | |
257 | ||
4f62efe6 | 258 | char *string; /* iConfiguration string, if present */ |
165fe97e CN |
259 | |
260 | /* List of any Interface Association Descriptors in this | |
261 | * configuration. */ | |
262 | struct usb_interface_assoc_descriptor *intf_assoc[USB_MAXIADS]; | |
263 | ||
1da177e4 LT |
264 | /* the interfaces associated with this configuration, |
265 | * stored in no particular order */ | |
266 | struct usb_interface *interface[USB_MAXINTERFACES]; | |
267 | ||
268 | /* Interface information available even when this is not the | |
269 | * active configuration */ | |
270 | struct usb_interface_cache *intf_cache[USB_MAXINTERFACES]; | |
271 | ||
272 | unsigned char *extra; /* Extra descriptors */ | |
273 | int extralen; | |
274 | }; | |
275 | ||
276 | int __usb_get_extra_descriptor(char *buffer, unsigned size, | |
277 | unsigned char type, void **ptr); | |
969ab2ee GKH |
278 | #define usb_get_extra_descriptor(ifpoint, type, ptr) \ |
279 | __usb_get_extra_descriptor((ifpoint)->extra, \ | |
280 | (ifpoint)->extralen, \ | |
281 | type, (void **)ptr) | |
1da177e4 | 282 | |
b724ae77 | 283 | /* ----------------------------------------------------------------------- */ |
1da177e4 | 284 | |
1da177e4 LT |
285 | /* USB device number allocation bitmap */ |
286 | struct usb_devmap { | |
287 | unsigned long devicemap[128 / (8*sizeof(unsigned long))]; | |
288 | }; | |
289 | ||
290 | /* | |
291 | * Allocated per bus (tree of devices) we have: | |
292 | */ | |
293 | struct usb_bus { | |
294 | struct device *controller; /* host/master side hardware */ | |
295 | int busnum; /* Bus number (in order of reg) */ | |
296 | char *bus_name; /* stable id (PCI slot_name etc) */ | |
dd990f16 | 297 | u8 uses_dma; /* Does the host controller use DMA? */ |
1da177e4 LT |
298 | u8 otg_port; /* 0, or number of OTG/HNP port */ |
299 | unsigned is_b_host:1; /* true during some HNP roleswitches */ | |
300 | unsigned b_hnp_enable:1; /* OTG: did A-Host enable HNP? */ | |
301 | ||
b724ae77 AS |
302 | int devnum_next; /* Next open device number in |
303 | * round-robin allocation */ | |
1da177e4 LT |
304 | |
305 | struct usb_devmap devmap; /* device address allocation map */ | |
1da177e4 LT |
306 | struct usb_device *root_hub; /* Root hub */ |
307 | struct list_head bus_list; /* list of busses */ | |
1da177e4 LT |
308 | |
309 | int bandwidth_allocated; /* on this bus: how much of the time | |
310 | * reserved for periodic (intr/iso) | |
311 | * requests is used, on average? | |
312 | * Units: microseconds/frame. | |
313 | * Limits: Full/low speed reserve 90%, | |
314 | * while high speed reserves 80%. | |
315 | */ | |
316 | int bandwidth_int_reqs; /* number of Interrupt requests */ | |
317 | int bandwidth_isoc_reqs; /* number of Isoc. requests */ | |
318 | ||
9f8b17e6 | 319 | #ifdef CONFIG_USB_DEVICEFS |
1da177e4 | 320 | struct dentry *usbfs_dentry; /* usbfs dentry entry for the bus */ |
9f8b17e6 | 321 | #endif |
5a3201b2 | 322 | struct device *dev; /* device for this bus */ |
b724ae77 | 323 | |
4749f32d | 324 | #if defined(CONFIG_USB_MON) |
1da177e4 LT |
325 | struct mon_bus *mon_bus; /* non-null when associated */ |
326 | int monitored; /* non-zero when monitored */ | |
327 | #endif | |
328 | }; | |
1da177e4 | 329 | |
b724ae77 | 330 | /* ----------------------------------------------------------------------- */ |
1da177e4 LT |
331 | |
332 | /* This is arbitrary. | |
333 | * From USB 2.0 spec Table 11-13, offset 7, a hub can | |
334 | * have up to 255 ports. The most yet reported is 10. | |
43705251 | 335 | * |
336 | * Current Wireless USB host hardware (Intel i1480 for example) allows | |
337 | * up to 22 devices to connect. Upcoming hardware might raise that | |
338 | * limit. Because the arrays need to add a bit for hub status data, we | |
339 | * do 31, so plus one evens out to four bytes. | |
1da177e4 | 340 | */ |
43705251 | 341 | #define USB_MAXCHILDREN (31) |
1da177e4 LT |
342 | |
343 | struct usb_tt; | |
344 | ||
345 | /* | |
346 | * struct usb_device - kernel's representation of a USB device | |
347 | * | |
348 | * FIXME: Write the kerneldoc! | |
349 | * | |
350 | * Usbcore drivers should not set usbdev->state directly. Instead use | |
351 | * usb_set_device_state(). | |
da04b7a4 IPG |
352 | * |
353 | * @authorized: (user space) policy determines if we authorize this | |
354 | * device to be used or not. By default, wired USB | |
355 | * devices are authorized. WUSB devices are not, until we | |
356 | * authorize them from user space. FIXME -- complete doc | |
1da177e4 LT |
357 | */ |
358 | struct usb_device { | |
359 | int devnum; /* Address on USB bus */ | |
360 | char devpath [16]; /* Use in messages: /port/port/... */ | |
361 | enum usb_device_state state; /* configured, not attached, etc */ | |
362 | enum usb_device_speed speed; /* high/full/low (or error) */ | |
363 | ||
364 | struct usb_tt *tt; /* low/full speed dev, highspeed hub */ | |
365 | int ttport; /* device port on that tt hub */ | |
366 | ||
b724ae77 AS |
367 | unsigned int toggle[2]; /* one bit for each endpoint |
368 | * ([0] = IN, [1] = OUT) */ | |
1da177e4 LT |
369 | |
370 | struct usb_device *parent; /* our hub, unless we're the root */ | |
371 | struct usb_bus *bus; /* Bus we're part of */ | |
372 | struct usb_host_endpoint ep0; | |
373 | ||
374 | struct device dev; /* Generic device interface */ | |
375 | ||
376 | struct usb_device_descriptor descriptor;/* Descriptor */ | |
377 | struct usb_host_config *config; /* All of the configs */ | |
378 | ||
379 | struct usb_host_config *actconfig;/* the active configuration */ | |
380 | struct usb_host_endpoint *ep_in[16]; | |
381 | struct usb_host_endpoint *ep_out[16]; | |
382 | ||
383 | char **rawdescriptors; /* Raw descriptors for each config */ | |
384 | ||
55c52718 | 385 | unsigned short bus_mA; /* Current available from the bus */ |
12c3da34 | 386 | u8 portnum; /* Parent port number (origin 1) */ |
b6956ffa | 387 | u8 level; /* Number of USB hub ancestors */ |
55c52718 | 388 | |
6840d255 | 389 | unsigned can_submit:1; /* URBs may be submitted */ |
ee49fb5d | 390 | unsigned discon_suspended:1; /* Disconnected while suspended */ |
ce361587 | 391 | unsigned have_langid:1; /* whether string_langid is valid */ |
969ab2ee | 392 | unsigned authorized:1; /* Policy has said we can use it */ |
da04b7a4 | 393 | unsigned wusb:1; /* Device is Wireless USB */ |
1da177e4 LT |
394 | int string_langid; /* language ID for strings */ |
395 | ||
4f62efe6 AS |
396 | /* static strings from the device */ |
397 | char *product; /* iProduct string, if present */ | |
398 | char *manufacturer; /* iManufacturer string, if present */ | |
399 | char *serial; /* iSerialNumber string, if present */ | |
400 | ||
1da177e4 | 401 | struct list_head filelist; |
9f8b17e6 KS |
402 | #ifdef CONFIG_USB_DEVICE_CLASS |
403 | struct device *usb_classdev; | |
404 | #endif | |
405 | #ifdef CONFIG_USB_DEVICEFS | |
1da177e4 | 406 | struct dentry *usbfs_dentry; /* usbfs dentry entry for the device */ |
9f8b17e6 | 407 | #endif |
1da177e4 LT |
408 | /* |
409 | * Child devices - these can be either new devices | |
410 | * (if this is a hub device), or different instances | |
411 | * of this same device. | |
412 | * | |
413 | * Each instance needs its own set of data structures. | |
414 | */ | |
415 | ||
416 | int maxchild; /* Number of ports if hub */ | |
417 | struct usb_device *children[USB_MAXCHILDREN]; | |
645daaab | 418 | |
e0318ebf | 419 | int pm_usage_cnt; /* usage counter for autosuspend */ |
7ceec1f1 | 420 | u32 quirks; /* quirks of the whole device */ |
969ab2ee GKH |
421 | atomic_t urbnum; /* number of URBs submitted for |
422 | the whole device */ | |
b5e795f8 | 423 | |
15123006 SS |
424 | unsigned long active_duration; /* total time device is not suspended */ |
425 | ||
645daaab | 426 | #ifdef CONFIG_PM |
c4028958 | 427 | struct delayed_work autosuspend; /* for delayed autosuspends */ |
645daaab | 428 | struct mutex pm_mutex; /* protects PM operations */ |
645daaab | 429 | |
1941044a | 430 | unsigned long last_busy; /* time of last use */ |
eaafbc3a | 431 | int autosuspend_delay; /* in jiffies */ |
15123006 | 432 | unsigned long connect_time; /* time device was first connected */ |
b5e795f8 | 433 | |
645daaab AS |
434 | unsigned auto_pm:1; /* autosuspend/resume in progress */ |
435 | unsigned do_remote_wakeup:1; /* remote wakeup should be enabled */ | |
0458d5b4 | 436 | unsigned reset_resume:1; /* needs reset instead of resume */ |
b41a60ec | 437 | unsigned persist_enabled:1; /* USB_PERSIST enabled for this dev */ |
2add5229 AS |
438 | unsigned autosuspend_disabled:1; /* autosuspend and autoresume */ |
439 | unsigned autoresume_disabled:1; /* disabled by the user */ | |
271f9e68 | 440 | unsigned skip_sys_resume:1; /* skip the next system resume */ |
645daaab | 441 | #endif |
1da177e4 LT |
442 | }; |
443 | #define to_usb_device(d) container_of(d, struct usb_device, dev) | |
444 | ||
445 | extern struct usb_device *usb_get_dev(struct usb_device *dev); | |
446 | extern void usb_put_dev(struct usb_device *dev); | |
447 | ||
9ad3d6cc AS |
448 | /* USB device locking */ |
449 | #define usb_lock_device(udev) down(&(udev)->dev.sem) | |
450 | #define usb_unlock_device(udev) up(&(udev)->dev.sem) | |
451 | #define usb_trylock_device(udev) down_trylock(&(udev)->dev.sem) | |
1da177e4 | 452 | extern int usb_lock_device_for_reset(struct usb_device *udev, |
095bc335 | 453 | const struct usb_interface *iface); |
1da177e4 LT |
454 | |
455 | /* USB port reset for device reinitialization */ | |
456 | extern int usb_reset_device(struct usb_device *dev); | |
79efa097 AS |
457 | extern int usb_reset_composite_device(struct usb_device *dev, |
458 | struct usb_interface *iface); | |
1da177e4 LT |
459 | |
460 | extern struct usb_device *usb_find_device(u16 vendor_id, u16 product_id); | |
461 | ||
645daaab AS |
462 | /* USB autosuspend and autoresume */ |
463 | #ifdef CONFIG_USB_SUSPEND | |
692a186c | 464 | extern int usb_autopm_set_interface(struct usb_interface *intf); |
645daaab AS |
465 | extern int usb_autopm_get_interface(struct usb_interface *intf); |
466 | extern void usb_autopm_put_interface(struct usb_interface *intf); | |
467 | ||
692a186c AS |
468 | static inline void usb_autopm_enable(struct usb_interface *intf) |
469 | { | |
470 | intf->pm_usage_cnt = 0; | |
471 | usb_autopm_set_interface(intf); | |
472 | } | |
473 | ||
474 | static inline void usb_autopm_disable(struct usb_interface *intf) | |
475 | { | |
476 | intf->pm_usage_cnt = 1; | |
477 | usb_autopm_set_interface(intf); | |
478 | } | |
479 | ||
1941044a AS |
480 | static inline void usb_mark_last_busy(struct usb_device *udev) |
481 | { | |
482 | udev->last_busy = jiffies; | |
483 | } | |
484 | ||
645daaab | 485 | #else |
645daaab | 486 | |
692a186c AS |
487 | static inline int usb_autopm_set_interface(struct usb_interface *intf) |
488 | { return 0; } | |
489 | ||
490 | static inline int usb_autopm_get_interface(struct usb_interface *intf) | |
491 | { return 0; } | |
492 | ||
493 | static inline void usb_autopm_put_interface(struct usb_interface *intf) | |
494 | { } | |
495 | static inline void usb_autopm_enable(struct usb_interface *intf) | |
496 | { } | |
497 | static inline void usb_autopm_disable(struct usb_interface *intf) | |
498 | { } | |
1941044a AS |
499 | static inline void usb_mark_last_busy(struct usb_device *udev) |
500 | { } | |
692a186c | 501 | #endif |
645daaab | 502 | |
1da177e4 LT |
503 | /*-------------------------------------------------------------------------*/ |
504 | ||
505 | /* for drivers using iso endpoints */ | |
969ab2ee | 506 | extern int usb_get_current_frame_number(struct usb_device *usb_dev); |
1da177e4 LT |
507 | |
508 | /* used these for multi-interface device registration */ | |
509 | extern int usb_driver_claim_interface(struct usb_driver *driver, | |
969ab2ee | 510 | struct usb_interface *iface, void *priv); |
1da177e4 LT |
511 | |
512 | /** | |
513 | * usb_interface_claimed - returns true iff an interface is claimed | |
514 | * @iface: the interface being checked | |
515 | * | |
516 | * Returns true (nonzero) iff the interface is claimed, else false (zero). | |
517 | * Callers must own the driver model's usb bus readlock. So driver | |
518 | * probe() entries don't need extra locking, but other call contexts | |
519 | * may need to explicitly claim that lock. | |
520 | * | |
521 | */ | |
969ab2ee GKH |
522 | static inline int usb_interface_claimed(struct usb_interface *iface) |
523 | { | |
1da177e4 LT |
524 | return (iface->dev.driver != NULL); |
525 | } | |
526 | ||
527 | extern void usb_driver_release_interface(struct usb_driver *driver, | |
528 | struct usb_interface *iface); | |
529 | const struct usb_device_id *usb_match_id(struct usb_interface *interface, | |
530 | const struct usb_device_id *id); | |
93bacefc GKH |
531 | extern int usb_match_one_id(struct usb_interface *interface, |
532 | const struct usb_device_id *id); | |
1da177e4 LT |
533 | |
534 | extern struct usb_interface *usb_find_interface(struct usb_driver *drv, | |
535 | int minor); | |
095bc335 | 536 | extern struct usb_interface *usb_ifnum_to_if(const struct usb_device *dev, |
1da177e4 LT |
537 | unsigned ifnum); |
538 | extern struct usb_host_interface *usb_altnum_to_altsetting( | |
095bc335 | 539 | const struct usb_interface *intf, unsigned int altnum); |
1da177e4 LT |
540 | |
541 | ||
542 | /** | |
543 | * usb_make_path - returns stable device path in the usb tree | |
544 | * @dev: the device whose path is being constructed | |
545 | * @buf: where to put the string | |
546 | * @size: how big is "buf"? | |
547 | * | |
548 | * Returns length of the string (> 0) or negative if size was too small. | |
549 | * | |
550 | * This identifier is intended to be "stable", reflecting physical paths in | |
551 | * hardware such as physical bus addresses for host controllers or ports on | |
552 | * USB hubs. That makes it stay the same until systems are physically | |
553 | * reconfigured, by re-cabling a tree of USB devices or by moving USB host | |
554 | * controllers. Adding and removing devices, including virtual root hubs | |
555 | * in host controller driver modules, does not change these path identifers; | |
556 | * neither does rebooting or re-enumerating. These are more useful identifiers | |
557 | * than changeable ("unstable") ones like bus numbers or device addresses. | |
558 | * | |
559 | * With a partial exception for devices connected to USB 2.0 root hubs, these | |
560 | * identifiers are also predictable. So long as the device tree isn't changed, | |
561 | * plugging any USB device into a given hub port always gives it the same path. | |
562 | * Because of the use of "companion" controllers, devices connected to ports on | |
563 | * USB 2.0 root hubs (EHCI host controllers) will get one path ID if they are | |
564 | * high speed, and a different one if they are full or low speed. | |
565 | */ | |
969ab2ee | 566 | static inline int usb_make_path(struct usb_device *dev, char *buf, size_t size) |
1da177e4 LT |
567 | { |
568 | int actual; | |
969ab2ee GKH |
569 | actual = snprintf(buf, size, "usb-%s-%s", dev->bus->bus_name, |
570 | dev->devpath); | |
1da177e4 LT |
571 | return (actual >= (int)size) ? -1 : actual; |
572 | } | |
573 | ||
574 | /*-------------------------------------------------------------------------*/ | |
575 | ||
5b653c79 AS |
576 | /** |
577 | * usb_endpoint_num - get the endpoint's number | |
578 | * @epd: endpoint to be checked | |
579 | * | |
580 | * Returns @epd's number: 0 to 15. | |
581 | */ | |
582 | static inline int usb_endpoint_num(const struct usb_endpoint_descriptor *epd) | |
583 | { | |
584 | return epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; | |
585 | } | |
586 | ||
587 | /** | |
588 | * usb_endpoint_type - get the endpoint's transfer type | |
589 | * @epd: endpoint to be checked | |
590 | * | |
591 | * Returns one of USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT} according | |
592 | * to @epd's transfer type. | |
593 | */ | |
594 | static inline int usb_endpoint_type(const struct usb_endpoint_descriptor *epd) | |
595 | { | |
596 | return epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; | |
597 | } | |
598 | ||
0c1ac4f2 LFC |
599 | /** |
600 | * usb_endpoint_dir_in - check if the endpoint has IN direction | |
601 | * @epd: endpoint to be checked | |
602 | * | |
603 | * Returns true if the endpoint is of type IN, otherwise it returns false. | |
604 | */ | |
605 | static inline int usb_endpoint_dir_in(const struct usb_endpoint_descriptor *epd) | |
606 | { | |
607 | return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN); | |
608 | } | |
609 | ||
610 | /** | |
611 | * usb_endpoint_dir_out - check if the endpoint has OUT direction | |
612 | * @epd: endpoint to be checked | |
613 | * | |
614 | * Returns true if the endpoint is of type OUT, otherwise it returns false. | |
615 | */ | |
969ab2ee GKH |
616 | static inline int usb_endpoint_dir_out( |
617 | const struct usb_endpoint_descriptor *epd) | |
0c1ac4f2 LFC |
618 | { |
619 | return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT); | |
620 | } | |
621 | ||
622 | /** | |
623 | * usb_endpoint_xfer_bulk - check if the endpoint has bulk transfer type | |
624 | * @epd: endpoint to be checked | |
625 | * | |
626 | * Returns true if the endpoint is of type bulk, otherwise it returns false. | |
627 | */ | |
969ab2ee GKH |
628 | static inline int usb_endpoint_xfer_bulk( |
629 | const struct usb_endpoint_descriptor *epd) | |
0c1ac4f2 LFC |
630 | { |
631 | return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == | |
632 | USB_ENDPOINT_XFER_BULK); | |
633 | } | |
634 | ||
a8ef36bc SB |
635 | /** |
636 | * usb_endpoint_xfer_control - check if the endpoint has control transfer type | |
637 | * @epd: endpoint to be checked | |
638 | * | |
639 | * Returns true if the endpoint is of type control, otherwise it returns false. | |
640 | */ | |
969ab2ee GKH |
641 | static inline int usb_endpoint_xfer_control( |
642 | const struct usb_endpoint_descriptor *epd) | |
a8ef36bc SB |
643 | { |
644 | return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == | |
645 | USB_ENDPOINT_XFER_CONTROL); | |
646 | } | |
647 | ||
0c1ac4f2 LFC |
648 | /** |
649 | * usb_endpoint_xfer_int - check if the endpoint has interrupt transfer type | |
650 | * @epd: endpoint to be checked | |
651 | * | |
652 | * Returns true if the endpoint is of type interrupt, otherwise it returns | |
653 | * false. | |
654 | */ | |
969ab2ee GKH |
655 | static inline int usb_endpoint_xfer_int( |
656 | const struct usb_endpoint_descriptor *epd) | |
0c1ac4f2 LFC |
657 | { |
658 | return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == | |
659 | USB_ENDPOINT_XFER_INT); | |
660 | } | |
661 | ||
662 | /** | |
663 | * usb_endpoint_xfer_isoc - check if the endpoint has isochronous transfer type | |
664 | * @epd: endpoint to be checked | |
665 | * | |
666 | * Returns true if the endpoint is of type isochronous, otherwise it returns | |
667 | * false. | |
668 | */ | |
969ab2ee GKH |
669 | static inline int usb_endpoint_xfer_isoc( |
670 | const struct usb_endpoint_descriptor *epd) | |
0c1ac4f2 LFC |
671 | { |
672 | return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == | |
673 | USB_ENDPOINT_XFER_ISOC); | |
674 | } | |
675 | ||
676 | /** | |
677 | * usb_endpoint_is_bulk_in - check if the endpoint is bulk IN | |
678 | * @epd: endpoint to be checked | |
679 | * | |
680 | * Returns true if the endpoint has bulk transfer type and IN direction, | |
681 | * otherwise it returns false. | |
682 | */ | |
969ab2ee GKH |
683 | static inline int usb_endpoint_is_bulk_in( |
684 | const struct usb_endpoint_descriptor *epd) | |
0c1ac4f2 LFC |
685 | { |
686 | return (usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_in(epd)); | |
687 | } | |
688 | ||
689 | /** | |
690 | * usb_endpoint_is_bulk_out - check if the endpoint is bulk OUT | |
691 | * @epd: endpoint to be checked | |
692 | * | |
693 | * Returns true if the endpoint has bulk transfer type and OUT direction, | |
694 | * otherwise it returns false. | |
695 | */ | |
969ab2ee GKH |
696 | static inline int usb_endpoint_is_bulk_out( |
697 | const struct usb_endpoint_descriptor *epd) | |
0c1ac4f2 LFC |
698 | { |
699 | return (usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_out(epd)); | |
700 | } | |
701 | ||
702 | /** | |
703 | * usb_endpoint_is_int_in - check if the endpoint is interrupt IN | |
704 | * @epd: endpoint to be checked | |
705 | * | |
706 | * Returns true if the endpoint has interrupt transfer type and IN direction, | |
707 | * otherwise it returns false. | |
708 | */ | |
969ab2ee GKH |
709 | static inline int usb_endpoint_is_int_in( |
710 | const struct usb_endpoint_descriptor *epd) | |
0c1ac4f2 LFC |
711 | { |
712 | return (usb_endpoint_xfer_int(epd) && usb_endpoint_dir_in(epd)); | |
713 | } | |
714 | ||
715 | /** | |
716 | * usb_endpoint_is_int_out - check if the endpoint is interrupt OUT | |
717 | * @epd: endpoint to be checked | |
718 | * | |
719 | * Returns true if the endpoint has interrupt transfer type and OUT direction, | |
720 | * otherwise it returns false. | |
721 | */ | |
969ab2ee GKH |
722 | static inline int usb_endpoint_is_int_out( |
723 | const struct usb_endpoint_descriptor *epd) | |
0c1ac4f2 LFC |
724 | { |
725 | return (usb_endpoint_xfer_int(epd) && usb_endpoint_dir_out(epd)); | |
726 | } | |
727 | ||
728 | /** | |
729 | * usb_endpoint_is_isoc_in - check if the endpoint is isochronous IN | |
730 | * @epd: endpoint to be checked | |
731 | * | |
732 | * Returns true if the endpoint has isochronous transfer type and IN direction, | |
733 | * otherwise it returns false. | |
734 | */ | |
969ab2ee GKH |
735 | static inline int usb_endpoint_is_isoc_in( |
736 | const struct usb_endpoint_descriptor *epd) | |
0c1ac4f2 LFC |
737 | { |
738 | return (usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_in(epd)); | |
739 | } | |
740 | ||
741 | /** | |
742 | * usb_endpoint_is_isoc_out - check if the endpoint is isochronous OUT | |
743 | * @epd: endpoint to be checked | |
744 | * | |
745 | * Returns true if the endpoint has isochronous transfer type and OUT direction, | |
746 | * otherwise it returns false. | |
747 | */ | |
969ab2ee GKH |
748 | static inline int usb_endpoint_is_isoc_out( |
749 | const struct usb_endpoint_descriptor *epd) | |
0c1ac4f2 LFC |
750 | { |
751 | return (usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_out(epd)); | |
752 | } | |
b7cfaaaf LFC |
753 | |
754 | /*-------------------------------------------------------------------------*/ | |
755 | ||
b724ae77 AS |
756 | #define USB_DEVICE_ID_MATCH_DEVICE \ |
757 | (USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_PRODUCT) | |
758 | #define USB_DEVICE_ID_MATCH_DEV_RANGE \ | |
759 | (USB_DEVICE_ID_MATCH_DEV_LO | USB_DEVICE_ID_MATCH_DEV_HI) | |
760 | #define USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION \ | |
761 | (USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_DEV_RANGE) | |
1da177e4 | 762 | #define USB_DEVICE_ID_MATCH_DEV_INFO \ |
b724ae77 AS |
763 | (USB_DEVICE_ID_MATCH_DEV_CLASS | \ |
764 | USB_DEVICE_ID_MATCH_DEV_SUBCLASS | \ | |
765 | USB_DEVICE_ID_MATCH_DEV_PROTOCOL) | |
1da177e4 | 766 | #define USB_DEVICE_ID_MATCH_INT_INFO \ |
b724ae77 AS |
767 | (USB_DEVICE_ID_MATCH_INT_CLASS | \ |
768 | USB_DEVICE_ID_MATCH_INT_SUBCLASS | \ | |
769 | USB_DEVICE_ID_MATCH_INT_PROTOCOL) | |
1da177e4 LT |
770 | |
771 | /** | |
772 | * USB_DEVICE - macro used to describe a specific usb device | |
773 | * @vend: the 16 bit USB Vendor ID | |
774 | * @prod: the 16 bit USB Product ID | |
775 | * | |
776 | * This macro is used to create a struct usb_device_id that matches a | |
777 | * specific device. | |
778 | */ | |
779 | #define USB_DEVICE(vend,prod) \ | |
969ab2ee GKH |
780 | .match_flags = USB_DEVICE_ID_MATCH_DEVICE, \ |
781 | .idVendor = (vend), \ | |
782 | .idProduct = (prod) | |
1da177e4 | 783 | /** |
b724ae77 AS |
784 | * USB_DEVICE_VER - macro used to describe a specific usb device with a |
785 | * version range | |
1da177e4 LT |
786 | * @vend: the 16 bit USB Vendor ID |
787 | * @prod: the 16 bit USB Product ID | |
788 | * @lo: the bcdDevice_lo value | |
789 | * @hi: the bcdDevice_hi value | |
790 | * | |
791 | * This macro is used to create a struct usb_device_id that matches a | |
792 | * specific device, with a version range. | |
793 | */ | |
969ab2ee | 794 | #define USB_DEVICE_VER(vend, prod, lo, hi) \ |
b724ae77 | 795 | .match_flags = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION, \ |
969ab2ee GKH |
796 | .idVendor = (vend), \ |
797 | .idProduct = (prod), \ | |
798 | .bcdDevice_lo = (lo), \ | |
799 | .bcdDevice_hi = (hi) | |
1da177e4 | 800 | |
f836ac80 JK |
801 | /** |
802 | * USB_DEVICE_INTERFACE_PROTOCOL - macro used to describe a usb | |
803 | * device with a specific interface protocol | |
804 | * @vend: the 16 bit USB Vendor ID | |
805 | * @prod: the 16 bit USB Product ID | |
806 | * @pr: bInterfaceProtocol value | |
807 | * | |
808 | * This macro is used to create a struct usb_device_id that matches a | |
809 | * specific interface protocol of devices. | |
810 | */ | |
969ab2ee GKH |
811 | #define USB_DEVICE_INTERFACE_PROTOCOL(vend, prod, pr) \ |
812 | .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \ | |
813 | USB_DEVICE_ID_MATCH_INT_PROTOCOL, \ | |
f836ac80 JK |
814 | .idVendor = (vend), \ |
815 | .idProduct = (prod), \ | |
816 | .bInterfaceProtocol = (pr) | |
817 | ||
1da177e4 LT |
818 | /** |
819 | * USB_DEVICE_INFO - macro used to describe a class of usb devices | |
820 | * @cl: bDeviceClass value | |
821 | * @sc: bDeviceSubClass value | |
822 | * @pr: bDeviceProtocol value | |
823 | * | |
824 | * This macro is used to create a struct usb_device_id that matches a | |
825 | * specific class of devices. | |
826 | */ | |
969ab2ee GKH |
827 | #define USB_DEVICE_INFO(cl, sc, pr) \ |
828 | .match_flags = USB_DEVICE_ID_MATCH_DEV_INFO, \ | |
829 | .bDeviceClass = (cl), \ | |
830 | .bDeviceSubClass = (sc), \ | |
831 | .bDeviceProtocol = (pr) | |
1da177e4 LT |
832 | |
833 | /** | |
969ab2ee | 834 | * USB_INTERFACE_INFO - macro used to describe a class of usb interfaces |
1da177e4 LT |
835 | * @cl: bInterfaceClass value |
836 | * @sc: bInterfaceSubClass value | |
837 | * @pr: bInterfaceProtocol value | |
838 | * | |
839 | * This macro is used to create a struct usb_device_id that matches a | |
840 | * specific class of interfaces. | |
841 | */ | |
969ab2ee GKH |
842 | #define USB_INTERFACE_INFO(cl, sc, pr) \ |
843 | .match_flags = USB_DEVICE_ID_MATCH_INT_INFO, \ | |
844 | .bInterfaceClass = (cl), \ | |
845 | .bInterfaceSubClass = (sc), \ | |
846 | .bInterfaceProtocol = (pr) | |
8538f96a DD |
847 | |
848 | /** | |
849 | * USB_DEVICE_AND_INTERFACE_INFO - macro used to describe a specific usb device | |
850 | * with a class of usb interfaces | |
851 | * @vend: the 16 bit USB Vendor ID | |
852 | * @prod: the 16 bit USB Product ID | |
853 | * @cl: bInterfaceClass value | |
854 | * @sc: bInterfaceSubClass value | |
855 | * @pr: bInterfaceProtocol value | |
856 | * | |
857 | * This macro is used to create a struct usb_device_id that matches a | |
858 | * specific device with a specific class of interfaces. | |
859 | * | |
860 | * This is especially useful when explicitly matching devices that have | |
861 | * vendor specific bDeviceClass values, but standards-compliant interfaces. | |
862 | */ | |
969ab2ee | 863 | #define USB_DEVICE_AND_INTERFACE_INFO(vend, prod, cl, sc, pr) \ |
8538f96a DD |
864 | .match_flags = USB_DEVICE_ID_MATCH_INT_INFO \ |
865 | | USB_DEVICE_ID_MATCH_DEVICE, \ | |
969ab2ee GKH |
866 | .idVendor = (vend), \ |
867 | .idProduct = (prod), \ | |
8538f96a | 868 | .bInterfaceClass = (cl), \ |
969ab2ee GKH |
869 | .bInterfaceSubClass = (sc), \ |
870 | .bInterfaceProtocol = (pr) | |
1da177e4 | 871 | |
b724ae77 | 872 | /* ----------------------------------------------------------------------- */ |
1da177e4 | 873 | |
93bacefc | 874 | /* Stuff for dynamic usb ids */ |
733260ff GKH |
875 | struct usb_dynids { |
876 | spinlock_t lock; | |
877 | struct list_head list; | |
878 | }; | |
879 | ||
93bacefc GKH |
880 | struct usb_dynid { |
881 | struct list_head node; | |
882 | struct usb_device_id id; | |
883 | }; | |
884 | ||
885 | extern ssize_t usb_store_new_id(struct usb_dynids *dynids, | |
886 | struct device_driver *driver, | |
887 | const char *buf, size_t count); | |
888 | ||
1da177e4 | 889 | /** |
8bb54ab5 AS |
890 | * struct usbdrv_wrap - wrapper for driver-model structure |
891 | * @driver: The driver-model core driver structure. | |
892 | * @for_devices: Non-zero for device drivers, 0 for interface drivers. | |
893 | */ | |
894 | struct usbdrv_wrap { | |
895 | struct device_driver driver; | |
896 | int for_devices; | |
897 | }; | |
898 | ||
899 | /** | |
900 | * struct usb_driver - identifies USB interface driver to usbcore | |
1da177e4 LT |
901 | * @name: The driver name should be unique among USB drivers, |
902 | * and should normally be the same as the module name. | |
903 | * @probe: Called to see if the driver is willing to manage a particular | |
904 | * interface on a device. If it is, probe returns zero and uses | |
905 | * dev_set_drvdata() to associate driver-specific data with the | |
906 | * interface. It may also use usb_set_interface() to specify the | |
907 | * appropriate altsetting. If unwilling to manage the interface, | |
908 | * return a negative errno value. | |
909 | * @disconnect: Called when the interface is no longer accessible, usually | |
910 | * because its device has been (or is being) disconnected or the | |
911 | * driver module is being unloaded. | |
912 | * @ioctl: Used for drivers that want to talk to userspace through | |
913 | * the "usbfs" filesystem. This lets devices provide ways to | |
914 | * expose information to user space regardless of where they | |
915 | * do (or don't) show up otherwise in the filesystem. | |
916 | * @suspend: Called when the device is going to be suspended by the system. | |
917 | * @resume: Called when the device is being resumed by the system. | |
f07600cf AS |
918 | * @reset_resume: Called when the suspended device has been reset instead |
919 | * of being resumed. | |
79efa097 AS |
920 | * @pre_reset: Called by usb_reset_composite_device() when the device |
921 | * is about to be reset. | |
922 | * @post_reset: Called by usb_reset_composite_device() after the device | |
0458d5b4 AS |
923 | * has been reset, or in lieu of @resume following a reset-resume |
924 | * (i.e., the device is reset instead of being resumed, as might | |
925 | * happen if power was lost). The second argument tells which is | |
926 | * the reason. | |
1da177e4 LT |
927 | * @id_table: USB drivers use ID table to support hotplugging. |
928 | * Export this with MODULE_DEVICE_TABLE(usb,...). This must be set | |
929 | * or your driver's probe function will never get called. | |
733260ff GKH |
930 | * @dynids: used internally to hold the list of dynamically added device |
931 | * ids for this driver. | |
8bb54ab5 | 932 | * @drvwrap: Driver-model core structure wrapper. |
ba9dc657 GKH |
933 | * @no_dynamic_id: if set to 1, the USB core will not allow dynamic ids to be |
934 | * added to this driver by preventing the sysfs file from being created. | |
645daaab AS |
935 | * @supports_autosuspend: if set to 0, the USB core will not allow autosuspend |
936 | * for interfaces bound to this driver. | |
1da177e4 | 937 | * |
8bb54ab5 AS |
938 | * USB interface drivers must provide a name, probe() and disconnect() |
939 | * methods, and an id_table. Other driver fields are optional. | |
1da177e4 LT |
940 | * |
941 | * The id_table is used in hotplugging. It holds a set of descriptors, | |
942 | * and specialized data may be associated with each entry. That table | |
943 | * is used by both user and kernel mode hotplugging support. | |
944 | * | |
945 | * The probe() and disconnect() methods are called in a context where | |
946 | * they can sleep, but they should avoid abusing the privilege. Most | |
947 | * work to connect to a device should be done when the device is opened, | |
948 | * and undone at the last close. The disconnect code needs to address | |
949 | * concurrency issues with respect to open() and close() methods, as | |
950 | * well as forcing all pending I/O requests to complete (by unlinking | |
951 | * them as necessary, and blocking until the unlinks complete). | |
952 | */ | |
953 | struct usb_driver { | |
1da177e4 LT |
954 | const char *name; |
955 | ||
956 | int (*probe) (struct usb_interface *intf, | |
957 | const struct usb_device_id *id); | |
958 | ||
959 | void (*disconnect) (struct usb_interface *intf); | |
960 | ||
b724ae77 AS |
961 | int (*ioctl) (struct usb_interface *intf, unsigned int code, |
962 | void *buf); | |
1da177e4 | 963 | |
27d72e85 | 964 | int (*suspend) (struct usb_interface *intf, pm_message_t message); |
1da177e4 | 965 | int (*resume) (struct usb_interface *intf); |
f07600cf | 966 | int (*reset_resume)(struct usb_interface *intf); |
1da177e4 | 967 | |
f07600cf AS |
968 | int (*pre_reset)(struct usb_interface *intf); |
969 | int (*post_reset)(struct usb_interface *intf); | |
79efa097 | 970 | |
1da177e4 LT |
971 | const struct usb_device_id *id_table; |
972 | ||
733260ff | 973 | struct usb_dynids dynids; |
8bb54ab5 | 974 | struct usbdrv_wrap drvwrap; |
ba9dc657 | 975 | unsigned int no_dynamic_id:1; |
645daaab | 976 | unsigned int supports_autosuspend:1; |
1da177e4 | 977 | }; |
8bb54ab5 AS |
978 | #define to_usb_driver(d) container_of(d, struct usb_driver, drvwrap.driver) |
979 | ||
980 | /** | |
981 | * struct usb_device_driver - identifies USB device driver to usbcore | |
982 | * @name: The driver name should be unique among USB drivers, | |
983 | * and should normally be the same as the module name. | |
984 | * @probe: Called to see if the driver is willing to manage a particular | |
985 | * device. If it is, probe returns zero and uses dev_set_drvdata() | |
986 | * to associate driver-specific data with the device. If unwilling | |
987 | * to manage the device, return a negative errno value. | |
988 | * @disconnect: Called when the device is no longer accessible, usually | |
989 | * because it has been (or is being) disconnected or the driver's | |
990 | * module is being unloaded. | |
991 | * @suspend: Called when the device is going to be suspended by the system. | |
992 | * @resume: Called when the device is being resumed by the system. | |
993 | * @drvwrap: Driver-model core structure wrapper. | |
645daaab AS |
994 | * @supports_autosuspend: if set to 0, the USB core will not allow autosuspend |
995 | * for devices bound to this driver. | |
8bb54ab5 AS |
996 | * |
997 | * USB drivers must provide all the fields listed above except drvwrap. | |
998 | */ | |
999 | struct usb_device_driver { | |
1000 | const char *name; | |
1001 | ||
1002 | int (*probe) (struct usb_device *udev); | |
1003 | void (*disconnect) (struct usb_device *udev); | |
1004 | ||
1005 | int (*suspend) (struct usb_device *udev, pm_message_t message); | |
1006 | int (*resume) (struct usb_device *udev); | |
1007 | struct usbdrv_wrap drvwrap; | |
645daaab | 1008 | unsigned int supports_autosuspend:1; |
8bb54ab5 AS |
1009 | }; |
1010 | #define to_usb_device_driver(d) container_of(d, struct usb_device_driver, \ | |
1011 | drvwrap.driver) | |
1da177e4 LT |
1012 | |
1013 | extern struct bus_type usb_bus_type; | |
1014 | ||
1015 | /** | |
1016 | * struct usb_class_driver - identifies a USB driver that wants to use the USB major number | |
d6e5bcf4 | 1017 | * @name: the usb class device name for this driver. Will show up in sysfs. |
1da177e4 | 1018 | * @fops: pointer to the struct file_operations of this driver. |
1da177e4 LT |
1019 | * @minor_base: the start of the minor range for this driver. |
1020 | * | |
1021 | * This structure is used for the usb_register_dev() and | |
1022 | * usb_unregister_dev() functions, to consolidate a number of the | |
1023 | * parameters used for them. | |
1024 | */ | |
1025 | struct usb_class_driver { | |
1026 | char *name; | |
99ac48f5 | 1027 | const struct file_operations *fops; |
d6e5bcf4 | 1028 | int minor_base; |
1da177e4 LT |
1029 | }; |
1030 | ||
1031 | /* | |
1032 | * use these in module_init()/module_exit() | |
1033 | * and don't forget MODULE_DEVICE_TABLE(usb, ...) | |
1034 | */ | |
80f745fb GKH |
1035 | extern int usb_register_driver(struct usb_driver *, struct module *, |
1036 | const char *); | |
2143acc6 GKH |
1037 | static inline int usb_register(struct usb_driver *driver) |
1038 | { | |
80f745fb | 1039 | return usb_register_driver(driver, THIS_MODULE, KBUILD_MODNAME); |
2143acc6 | 1040 | } |
1da177e4 LT |
1041 | extern void usb_deregister(struct usb_driver *); |
1042 | ||
8bb54ab5 AS |
1043 | extern int usb_register_device_driver(struct usb_device_driver *, |
1044 | struct module *); | |
1045 | extern void usb_deregister_device_driver(struct usb_device_driver *); | |
1046 | ||
1da177e4 LT |
1047 | extern int usb_register_dev(struct usb_interface *intf, |
1048 | struct usb_class_driver *class_driver); | |
1049 | extern void usb_deregister_dev(struct usb_interface *intf, | |
1050 | struct usb_class_driver *class_driver); | |
1051 | ||
1052 | extern int usb_disabled(void); | |
1053 | ||
b724ae77 | 1054 | /* ----------------------------------------------------------------------- */ |
1da177e4 LT |
1055 | |
1056 | /* | |
1057 | * URB support, for asynchronous request completions | |
1058 | */ | |
1059 | ||
1060 | /* | |
1061 | * urb->transfer_flags: | |
fea34091 AS |
1062 | * |
1063 | * Note: URB_DIR_IN/OUT is automatically set in usb_submit_urb(). | |
1da177e4 LT |
1064 | */ |
1065 | #define URB_SHORT_NOT_OK 0x0001 /* report short reads as errors */ | |
b724ae77 AS |
1066 | #define URB_ISO_ASAP 0x0002 /* iso-only, urb->start_frame |
1067 | * ignored */ | |
1da177e4 LT |
1068 | #define URB_NO_TRANSFER_DMA_MAP 0x0004 /* urb->transfer_dma valid on submit */ |
1069 | #define URB_NO_SETUP_DMA_MAP 0x0008 /* urb->setup_dma valid on submit */ | |
1da177e4 | 1070 | #define URB_NO_FSBR 0x0020 /* UHCI-specific */ |
b724ae77 AS |
1071 | #define URB_ZERO_PACKET 0x0040 /* Finish bulk OUT with short packet */ |
1072 | #define URB_NO_INTERRUPT 0x0080 /* HINT: no non-error interrupt | |
1073 | * needed */ | |
8b3b01c8 | 1074 | #define URB_FREE_BUFFER 0x0100 /* Free transfer buffer with the URB */ |
1da177e4 | 1075 | |
fea34091 AS |
1076 | #define URB_DIR_IN 0x0200 /* Transfer from device to host */ |
1077 | #define URB_DIR_OUT 0 | |
1078 | #define URB_DIR_MASK URB_DIR_IN | |
1079 | ||
1da177e4 LT |
1080 | struct usb_iso_packet_descriptor { |
1081 | unsigned int offset; | |
1082 | unsigned int length; /* expected length */ | |
1083 | unsigned int actual_length; | |
d1bbb600 | 1084 | int status; |
1da177e4 LT |
1085 | }; |
1086 | ||
1087 | struct urb; | |
1da177e4 | 1088 | |
51a2f077 ON |
1089 | struct usb_anchor { |
1090 | struct list_head urb_list; | |
1091 | wait_queue_head_t wait; | |
1092 | spinlock_t lock; | |
1093 | }; | |
1094 | ||
1095 | static inline void init_usb_anchor(struct usb_anchor *anchor) | |
1096 | { | |
1097 | INIT_LIST_HEAD(&anchor->urb_list); | |
1098 | init_waitqueue_head(&anchor->wait); | |
1099 | spin_lock_init(&anchor->lock); | |
1100 | } | |
1101 | ||
7d12e780 | 1102 | typedef void (*usb_complete_t)(struct urb *); |
1da177e4 LT |
1103 | |
1104 | /** | |
1105 | * struct urb - USB Request Block | |
1106 | * @urb_list: For use by current owner of the URB. | |
51a2f077 ON |
1107 | * @anchor_list: membership in the list of an anchor |
1108 | * @anchor: to anchor URBs to a common mooring | |
5b653c79 AS |
1109 | * @ep: Points to the endpoint's data structure. Will eventually |
1110 | * replace @pipe. | |
1da177e4 LT |
1111 | * @pipe: Holds endpoint number, direction, type, and more. |
1112 | * Create these values with the eight macros available; | |
1113 | * usb_{snd,rcv}TYPEpipe(dev,endpoint), where the TYPE is "ctrl" | |
1114 | * (control), "bulk", "int" (interrupt), or "iso" (isochronous). | |
1115 | * For example usb_sndbulkpipe() or usb_rcvintpipe(). Endpoint | |
1116 | * numbers range from zero to fifteen. Note that "in" endpoint two | |
1117 | * is a different endpoint (and pipe) from "out" endpoint two. | |
1118 | * The current configuration controls the existence, type, and | |
1119 | * maximum packet size of any given endpoint. | |
1120 | * @dev: Identifies the USB device to perform the request. | |
1121 | * @status: This is read in non-iso completion functions to get the | |
1122 | * status of the particular request. ISO requests only use it | |
1123 | * to tell whether the URB was unlinked; detailed status for | |
1124 | * each frame is in the fields of the iso_frame-desc. | |
1125 | * @transfer_flags: A variety of flags may be used to affect how URB | |
1126 | * submission, unlinking, or operation are handled. Different | |
1127 | * kinds of URB can use different flags. | |
1128 | * @transfer_buffer: This identifies the buffer to (or from) which | |
1129 | * the I/O request will be performed (unless URB_NO_TRANSFER_DMA_MAP | |
1130 | * is set). This buffer must be suitable for DMA; allocate it with | |
1131 | * kmalloc() or equivalent. For transfers to "in" endpoints, contents | |
1132 | * of this buffer will be modified. This buffer is used for the data | |
1133 | * stage of control transfers. | |
1134 | * @transfer_dma: When transfer_flags includes URB_NO_TRANSFER_DMA_MAP, | |
1135 | * the device driver is saying that it provided this DMA address, | |
1136 | * which the host controller driver should use in preference to the | |
1137 | * transfer_buffer. | |
1138 | * @transfer_buffer_length: How big is transfer_buffer. The transfer may | |
1139 | * be broken up into chunks according to the current maximum packet | |
1140 | * size for the endpoint, which is a function of the configuration | |
1141 | * and is encoded in the pipe. When the length is zero, neither | |
1142 | * transfer_buffer nor transfer_dma is used. | |
1143 | * @actual_length: This is read in non-iso completion functions, and | |
1144 | * it tells how many bytes (out of transfer_buffer_length) were | |
1145 | * transferred. It will normally be the same as requested, unless | |
1146 | * either an error was reported or a short read was performed. | |
1147 | * The URB_SHORT_NOT_OK transfer flag may be used to make such | |
969ab2ee | 1148 | * short reads be reported as errors. |
1da177e4 LT |
1149 | * @setup_packet: Only used for control transfers, this points to eight bytes |
1150 | * of setup data. Control transfers always start by sending this data | |
1151 | * to the device. Then transfer_buffer is read or written, if needed. | |
1152 | * @setup_dma: For control transfers with URB_NO_SETUP_DMA_MAP set, the | |
1153 | * device driver has provided this DMA address for the setup packet. | |
1154 | * The host controller driver should use this in preference to | |
1155 | * setup_packet. | |
1156 | * @start_frame: Returns the initial frame for isochronous transfers. | |
1157 | * @number_of_packets: Lists the number of ISO transfer buffers. | |
1158 | * @interval: Specifies the polling interval for interrupt or isochronous | |
1159 | * transfers. The units are frames (milliseconds) for for full and low | |
1160 | * speed devices, and microframes (1/8 millisecond) for highspeed ones. | |
1161 | * @error_count: Returns the number of ISO transfers that reported errors. | |
1162 | * @context: For use in completion functions. This normally points to | |
1163 | * request-specific driver context. | |
1164 | * @complete: Completion handler. This URB is passed as the parameter to the | |
1165 | * completion function. The completion function may then do what | |
1166 | * it likes with the URB, including resubmitting or freeing it. | |
969ab2ee | 1167 | * @iso_frame_desc: Used to provide arrays of ISO transfer buffers and to |
1da177e4 LT |
1168 | * collect the transfer status for each buffer. |
1169 | * | |
1170 | * This structure identifies USB transfer requests. URBs must be allocated by | |
1171 | * calling usb_alloc_urb() and freed with a call to usb_free_urb(). | |
1172 | * Initialization may be done using various usb_fill_*_urb() functions. URBs | |
1173 | * are submitted using usb_submit_urb(), and pending requests may be canceled | |
1174 | * using usb_unlink_urb() or usb_kill_urb(). | |
1175 | * | |
1176 | * Data Transfer Buffers: | |
1177 | * | |
1178 | * Normally drivers provide I/O buffers allocated with kmalloc() or otherwise | |
1179 | * taken from the general page pool. That is provided by transfer_buffer | |
1180 | * (control requests also use setup_packet), and host controller drivers | |
1181 | * perform a dma mapping (and unmapping) for each buffer transferred. Those | |
1182 | * mapping operations can be expensive on some platforms (perhaps using a dma | |
1183 | * bounce buffer or talking to an IOMMU), | |
1184 | * although they're cheap on commodity x86 and ppc hardware. | |
1185 | * | |
1186 | * Alternatively, drivers may pass the URB_NO_xxx_DMA_MAP transfer flags, | |
1187 | * which tell the host controller driver that no such mapping is needed since | |
1188 | * the device driver is DMA-aware. For example, a device driver might | |
1189 | * allocate a DMA buffer with usb_buffer_alloc() or call usb_buffer_map(). | |
1190 | * When these transfer flags are provided, host controller drivers will | |
1191 | * attempt to use the dma addresses found in the transfer_dma and/or | |
1192 | * setup_dma fields rather than determining a dma address themselves. (Note | |
1193 | * that transfer_buffer and setup_packet must still be set because not all | |
1194 | * host controllers use DMA, nor do virtual root hubs). | |
1195 | * | |
1196 | * Initialization: | |
1197 | * | |
1198 | * All URBs submitted must initialize the dev, pipe, transfer_flags (may be | |
b375a049 | 1199 | * zero), and complete fields. All URBs must also initialize |
1da177e4 LT |
1200 | * transfer_buffer and transfer_buffer_length. They may provide the |
1201 | * URB_SHORT_NOT_OK transfer flag, indicating that short reads are | |
1202 | * to be treated as errors; that flag is invalid for write requests. | |
1203 | * | |
1204 | * Bulk URBs may | |
1205 | * use the URB_ZERO_PACKET transfer flag, indicating that bulk OUT transfers | |
1206 | * should always terminate with a short packet, even if it means adding an | |
1207 | * extra zero length packet. | |
1208 | * | |
1209 | * Control URBs must provide a setup_packet. The setup_packet and | |
1210 | * transfer_buffer may each be mapped for DMA or not, independently of | |
1211 | * the other. The transfer_flags bits URB_NO_TRANSFER_DMA_MAP and | |
1212 | * URB_NO_SETUP_DMA_MAP indicate which buffers have already been mapped. | |
1213 | * URB_NO_SETUP_DMA_MAP is ignored for non-control URBs. | |
1214 | * | |
1215 | * Interrupt URBs must provide an interval, saying how often (in milliseconds | |
1216 | * or, for highspeed devices, 125 microsecond units) | |
1217 | * to poll for transfers. After the URB has been submitted, the interval | |
1218 | * field reflects how the transfer was actually scheduled. | |
1219 | * The polling interval may be more frequent than requested. | |
1220 | * For example, some controllers have a maximum interval of 32 milliseconds, | |
1221 | * while others support intervals of up to 1024 milliseconds. | |
1222 | * Isochronous URBs also have transfer intervals. (Note that for isochronous | |
1223 | * endpoints, as well as high speed interrupt endpoints, the encoding of | |
1224 | * the transfer interval in the endpoint descriptor is logarithmic. | |
1225 | * Device drivers must convert that value to linear units themselves.) | |
1226 | * | |
1227 | * Isochronous URBs normally use the URB_ISO_ASAP transfer flag, telling | |
1228 | * the host controller to schedule the transfer as soon as bandwidth | |
1229 | * utilization allows, and then set start_frame to reflect the actual frame | |
1230 | * selected during submission. Otherwise drivers must specify the start_frame | |
1231 | * and handle the case where the transfer can't begin then. However, drivers | |
1232 | * won't know how bandwidth is currently allocated, and while they can | |
1233 | * find the current frame using usb_get_current_frame_number () they can't | |
1234 | * know the range for that frame number. (Ranges for frame counter values | |
1235 | * are HC-specific, and can go from 256 to 65536 frames from "now".) | |
1236 | * | |
1237 | * Isochronous URBs have a different data transfer model, in part because | |
1238 | * the quality of service is only "best effort". Callers provide specially | |
1239 | * allocated URBs, with number_of_packets worth of iso_frame_desc structures | |
1240 | * at the end. Each such packet is an individual ISO transfer. Isochronous | |
1241 | * URBs are normally queued, submitted by drivers to arrange that | |
1242 | * transfers are at least double buffered, and then explicitly resubmitted | |
1243 | * in completion handlers, so | |
1244 | * that data (such as audio or video) streams at as constant a rate as the | |
1245 | * host controller scheduler can support. | |
1246 | * | |
1247 | * Completion Callbacks: | |
1248 | * | |
1249 | * The completion callback is made in_interrupt(), and one of the first | |
1250 | * things that a completion handler should do is check the status field. | |
1251 | * The status field is provided for all URBs. It is used to report | |
1252 | * unlinked URBs, and status for all non-ISO transfers. It should not | |
1253 | * be examined before the URB is returned to the completion handler. | |
1254 | * | |
1255 | * The context field is normally used to link URBs back to the relevant | |
1256 | * driver or request state. | |
1257 | * | |
1258 | * When the completion callback is invoked for non-isochronous URBs, the | |
1259 | * actual_length field tells how many bytes were transferred. This field | |
1260 | * is updated even when the URB terminated with an error or was unlinked. | |
1261 | * | |
1262 | * ISO transfer status is reported in the status and actual_length fields | |
1263 | * of the iso_frame_desc array, and the number of errors is reported in | |
1264 | * error_count. Completion callbacks for ISO transfers will normally | |
1265 | * (re)submit URBs to ensure a constant transfer rate. | |
719df469 RK |
1266 | * |
1267 | * Note that even fields marked "public" should not be touched by the driver | |
1268 | * when the urb is owned by the hcd, that is, since the call to | |
1269 | * usb_submit_urb() till the entry into the completion routine. | |
1da177e4 | 1270 | */ |
969ab2ee | 1271 | struct urb { |
aeec46b9 | 1272 | /* private: usb core and host controller only fields in the urb */ |
1da177e4 | 1273 | struct kref kref; /* reference count of the URB */ |
1da177e4 | 1274 | void *hcpriv; /* private data for host controller */ |
1da177e4 LT |
1275 | atomic_t use_count; /* concurrent submissions counter */ |
1276 | u8 reject; /* submissions will fail */ | |
eb231054 | 1277 | int unlinked; /* unlink error code */ |
1da177e4 | 1278 | |
aeec46b9 | 1279 | /* public: documented fields in the urb that can be used by drivers */ |
b724ae77 AS |
1280 | struct list_head urb_list; /* list head for use by the urb's |
1281 | * current owner */ | |
969ab2ee | 1282 | struct list_head anchor_list; /* the URB may be anchored */ |
51a2f077 | 1283 | struct usb_anchor *anchor; |
1da177e4 | 1284 | struct usb_device *dev; /* (in) pointer to associated device */ |
969ab2ee | 1285 | struct usb_host_endpoint *ep; /* (internal) pointer to endpoint */ |
1da177e4 LT |
1286 | unsigned int pipe; /* (in) pipe information */ |
1287 | int status; /* (return) non-ISO status */ | |
1288 | unsigned int transfer_flags; /* (in) URB_SHORT_NOT_OK | ...*/ | |
1289 | void *transfer_buffer; /* (in) associated data buffer */ | |
1290 | dma_addr_t transfer_dma; /* (in) dma addr for transfer_buffer */ | |
1291 | int transfer_buffer_length; /* (in) data buffer length */ | |
1292 | int actual_length; /* (return) actual transfer length */ | |
1293 | unsigned char *setup_packet; /* (in) setup packet (control only) */ | |
1294 | dma_addr_t setup_dma; /* (in) dma addr for setup_packet */ | |
1295 | int start_frame; /* (modify) start frame (ISO) */ | |
1296 | int number_of_packets; /* (in) number of ISO packets */ | |
b724ae77 AS |
1297 | int interval; /* (modify) transfer interval |
1298 | * (INT/ISO) */ | |
1da177e4 LT |
1299 | int error_count; /* (return) number of ISO errors */ |
1300 | void *context; /* (in) context for completion */ | |
1301 | usb_complete_t complete; /* (in) completion routine */ | |
b724ae77 AS |
1302 | struct usb_iso_packet_descriptor iso_frame_desc[0]; |
1303 | /* (in) ISO ONLY */ | |
1da177e4 LT |
1304 | }; |
1305 | ||
b724ae77 | 1306 | /* ----------------------------------------------------------------------- */ |
1da177e4 LT |
1307 | |
1308 | /** | |
1309 | * usb_fill_control_urb - initializes a control urb | |
1310 | * @urb: pointer to the urb to initialize. | |
1311 | * @dev: pointer to the struct usb_device for this urb. | |
1312 | * @pipe: the endpoint pipe | |
1313 | * @setup_packet: pointer to the setup_packet buffer | |
1314 | * @transfer_buffer: pointer to the transfer buffer | |
1315 | * @buffer_length: length of the transfer buffer | |
3d5b2510 | 1316 | * @complete_fn: pointer to the usb_complete_t function |
1da177e4 LT |
1317 | * @context: what to set the urb context to. |
1318 | * | |
1319 | * Initializes a control urb with the proper information needed to submit | |
1320 | * it to a device. | |
1321 | */ | |
969ab2ee GKH |
1322 | static inline void usb_fill_control_urb(struct urb *urb, |
1323 | struct usb_device *dev, | |
1324 | unsigned int pipe, | |
1325 | unsigned char *setup_packet, | |
1326 | void *transfer_buffer, | |
1327 | int buffer_length, | |
1328 | usb_complete_t complete_fn, | |
1329 | void *context) | |
1da177e4 | 1330 | { |
1da177e4 LT |
1331 | urb->dev = dev; |
1332 | urb->pipe = pipe; | |
1333 | urb->setup_packet = setup_packet; | |
1334 | urb->transfer_buffer = transfer_buffer; | |
1335 | urb->transfer_buffer_length = buffer_length; | |
3d5b2510 | 1336 | urb->complete = complete_fn; |
1da177e4 LT |
1337 | urb->context = context; |
1338 | } | |
1339 | ||
1340 | /** | |
1341 | * usb_fill_bulk_urb - macro to help initialize a bulk urb | |
1342 | * @urb: pointer to the urb to initialize. | |
1343 | * @dev: pointer to the struct usb_device for this urb. | |
1344 | * @pipe: the endpoint pipe | |
1345 | * @transfer_buffer: pointer to the transfer buffer | |
1346 | * @buffer_length: length of the transfer buffer | |
3d5b2510 | 1347 | * @complete_fn: pointer to the usb_complete_t function |
1da177e4 LT |
1348 | * @context: what to set the urb context to. |
1349 | * | |
1350 | * Initializes a bulk urb with the proper information needed to submit it | |
1351 | * to a device. | |
1352 | */ | |
969ab2ee GKH |
1353 | static inline void usb_fill_bulk_urb(struct urb *urb, |
1354 | struct usb_device *dev, | |
1355 | unsigned int pipe, | |
1356 | void *transfer_buffer, | |
1357 | int buffer_length, | |
1358 | usb_complete_t complete_fn, | |
1359 | void *context) | |
1da177e4 | 1360 | { |
1da177e4 LT |
1361 | urb->dev = dev; |
1362 | urb->pipe = pipe; | |
1363 | urb->transfer_buffer = transfer_buffer; | |
1364 | urb->transfer_buffer_length = buffer_length; | |
3d5b2510 | 1365 | urb->complete = complete_fn; |
1da177e4 LT |
1366 | urb->context = context; |
1367 | } | |
1368 | ||
1369 | /** | |
1370 | * usb_fill_int_urb - macro to help initialize a interrupt urb | |
1371 | * @urb: pointer to the urb to initialize. | |
1372 | * @dev: pointer to the struct usb_device for this urb. | |
1373 | * @pipe: the endpoint pipe | |
1374 | * @transfer_buffer: pointer to the transfer buffer | |
1375 | * @buffer_length: length of the transfer buffer | |
3d5b2510 | 1376 | * @complete_fn: pointer to the usb_complete_t function |
1da177e4 LT |
1377 | * @context: what to set the urb context to. |
1378 | * @interval: what to set the urb interval to, encoded like | |
1379 | * the endpoint descriptor's bInterval value. | |
1380 | * | |
1381 | * Initializes a interrupt urb with the proper information needed to submit | |
1382 | * it to a device. | |
1383 | * Note that high speed interrupt endpoints use a logarithmic encoding of | |
1384 | * the endpoint interval, and express polling intervals in microframes | |
1385 | * (eight per millisecond) rather than in frames (one per millisecond). | |
1386 | */ | |
969ab2ee GKH |
1387 | static inline void usb_fill_int_urb(struct urb *urb, |
1388 | struct usb_device *dev, | |
1389 | unsigned int pipe, | |
1390 | void *transfer_buffer, | |
1391 | int buffer_length, | |
1392 | usb_complete_t complete_fn, | |
1393 | void *context, | |
1394 | int interval) | |
1da177e4 | 1395 | { |
1da177e4 LT |
1396 | urb->dev = dev; |
1397 | urb->pipe = pipe; | |
1398 | urb->transfer_buffer = transfer_buffer; | |
1399 | urb->transfer_buffer_length = buffer_length; | |
3d5b2510 | 1400 | urb->complete = complete_fn; |
1da177e4 LT |
1401 | urb->context = context; |
1402 | if (dev->speed == USB_SPEED_HIGH) | |
1403 | urb->interval = 1 << (interval - 1); | |
1404 | else | |
1405 | urb->interval = interval; | |
1406 | urb->start_frame = -1; | |
1407 | } | |
1408 | ||
1409 | extern void usb_init_urb(struct urb *urb); | |
55016f10 | 1410 | extern struct urb *usb_alloc_urb(int iso_packets, gfp_t mem_flags); |
1da177e4 LT |
1411 | extern void usb_free_urb(struct urb *urb); |
1412 | #define usb_put_urb usb_free_urb | |
1413 | extern struct urb *usb_get_urb(struct urb *urb); | |
55016f10 | 1414 | extern int usb_submit_urb(struct urb *urb, gfp_t mem_flags); |
1da177e4 LT |
1415 | extern int usb_unlink_urb(struct urb *urb); |
1416 | extern void usb_kill_urb(struct urb *urb); | |
51a2f077 ON |
1417 | extern void usb_kill_anchored_urbs(struct usb_anchor *anchor); |
1418 | extern void usb_anchor_urb(struct urb *urb, struct usb_anchor *anchor); | |
1419 | extern void usb_unanchor_urb(struct urb *urb); | |
1420 | extern int usb_wait_anchor_empty_timeout(struct usb_anchor *anchor, | |
1421 | unsigned int timeout); | |
1da177e4 | 1422 | |
fea34091 AS |
1423 | /** |
1424 | * usb_urb_dir_in - check if an URB describes an IN transfer | |
1425 | * @urb: URB to be checked | |
1426 | * | |
1427 | * Returns 1 if @urb describes an IN transfer (device-to-host), | |
1428 | * otherwise 0. | |
1429 | */ | |
1430 | static inline int usb_urb_dir_in(struct urb *urb) | |
1431 | { | |
d617bc83 | 1432 | return (urb->transfer_flags & URB_DIR_MASK) == URB_DIR_IN; |
fea34091 AS |
1433 | } |
1434 | ||
1435 | /** | |
1436 | * usb_urb_dir_out - check if an URB describes an OUT transfer | |
1437 | * @urb: URB to be checked | |
1438 | * | |
1439 | * Returns 1 if @urb describes an OUT transfer (host-to-device), | |
1440 | * otherwise 0. | |
1441 | */ | |
1442 | static inline int usb_urb_dir_out(struct urb *urb) | |
1443 | { | |
1444 | return (urb->transfer_flags & URB_DIR_MASK) == URB_DIR_OUT; | |
1445 | } | |
1446 | ||
969ab2ee | 1447 | void *usb_buffer_alloc(struct usb_device *dev, size_t size, |
55016f10 | 1448 | gfp_t mem_flags, dma_addr_t *dma); |
969ab2ee | 1449 | void usb_buffer_free(struct usb_device *dev, size_t size, |
1da177e4 LT |
1450 | void *addr, dma_addr_t dma); |
1451 | ||
1452 | #if 0 | |
969ab2ee GKH |
1453 | struct urb *usb_buffer_map(struct urb *urb); |
1454 | void usb_buffer_dmasync(struct urb *urb); | |
1455 | void usb_buffer_unmap(struct urb *urb); | |
1da177e4 LT |
1456 | #endif |
1457 | ||
1458 | struct scatterlist; | |
5e60a161 | 1459 | int usb_buffer_map_sg(const struct usb_device *dev, int is_in, |
095bc335 | 1460 | struct scatterlist *sg, int nents); |
1da177e4 | 1461 | #if 0 |
5e60a161 | 1462 | void usb_buffer_dmasync_sg(const struct usb_device *dev, int is_in, |
095bc335 | 1463 | struct scatterlist *sg, int n_hw_ents); |
1da177e4 | 1464 | #endif |
5e60a161 | 1465 | void usb_buffer_unmap_sg(const struct usb_device *dev, int is_in, |
095bc335 | 1466 | struct scatterlist *sg, int n_hw_ents); |
1da177e4 LT |
1467 | |
1468 | /*-------------------------------------------------------------------* | |
1469 | * SYNCHRONOUS CALL SUPPORT * | |
1470 | *-------------------------------------------------------------------*/ | |
1471 | ||
1472 | extern int usb_control_msg(struct usb_device *dev, unsigned int pipe, | |
1473 | __u8 request, __u8 requesttype, __u16 value, __u16 index, | |
1474 | void *data, __u16 size, int timeout); | |
782a7a63 GKH |
1475 | extern int usb_interrupt_msg(struct usb_device *usb_dev, unsigned int pipe, |
1476 | void *data, int len, int *actual_length, int timeout); | |
1da177e4 LT |
1477 | extern int usb_bulk_msg(struct usb_device *usb_dev, unsigned int pipe, |
1478 | void *data, int len, int *actual_length, | |
1479 | int timeout); | |
1480 | ||
1da177e4 LT |
1481 | /* wrappers around usb_control_msg() for the most common standard requests */ |
1482 | extern int usb_get_descriptor(struct usb_device *dev, unsigned char desctype, | |
1483 | unsigned char descindex, void *buf, int size); | |
1484 | extern int usb_get_status(struct usb_device *dev, | |
1485 | int type, int target, void *data); | |
1da177e4 LT |
1486 | extern int usb_string(struct usb_device *dev, int index, |
1487 | char *buf, size_t size); | |
1488 | ||
1489 | /* wrappers that also update important state inside usbcore */ | |
1490 | extern int usb_clear_halt(struct usb_device *dev, int pipe); | |
1491 | extern int usb_reset_configuration(struct usb_device *dev); | |
1492 | extern int usb_set_interface(struct usb_device *dev, int ifnum, int alternate); | |
1493 | ||
088dc270 AS |
1494 | /* this request isn't really synchronous, but it belongs with the others */ |
1495 | extern int usb_driver_set_configuration(struct usb_device *udev, int config); | |
1496 | ||
1da177e4 LT |
1497 | /* |
1498 | * timeouts, in milliseconds, used for sending/receiving control messages | |
1499 | * they typically complete within a few frames (msec) after they're issued | |
1500 | * USB identifies 5 second timeouts, maybe more in a few cases, and a few | |
1501 | * slow devices (like some MGE Ellipse UPSes) actually push that limit. | |
1502 | */ | |
1503 | #define USB_CTRL_GET_TIMEOUT 5000 | |
1504 | #define USB_CTRL_SET_TIMEOUT 5000 | |
1505 | ||
1506 | ||
1507 | /** | |
1508 | * struct usb_sg_request - support for scatter/gather I/O | |
1509 | * @status: zero indicates success, else negative errno | |
1510 | * @bytes: counts bytes transferred. | |
1511 | * | |
1512 | * These requests are initialized using usb_sg_init(), and then are used | |
1513 | * as request handles passed to usb_sg_wait() or usb_sg_cancel(). Most | |
1514 | * members of the request object aren't for driver access. | |
1515 | * | |
1516 | * The status and bytecount values are valid only after usb_sg_wait() | |
1517 | * returns. If the status is zero, then the bytecount matches the total | |
1518 | * from the request. | |
1519 | * | |
1520 | * After an error completion, drivers may need to clear a halt condition | |
1521 | * on the endpoint. | |
1522 | */ | |
1523 | struct usb_sg_request { | |
1524 | int status; | |
1525 | size_t bytes; | |
1526 | ||
969ab2ee | 1527 | /* |
aeec46b9 | 1528 | * members below are private: to usbcore, |
1da177e4 LT |
1529 | * and are not provided for driver access! |
1530 | */ | |
1531 | spinlock_t lock; | |
1532 | ||
1533 | struct usb_device *dev; | |
1534 | int pipe; | |
1535 | struct scatterlist *sg; | |
1536 | int nents; | |
1537 | ||
1538 | int entries; | |
1539 | struct urb **urbs; | |
1540 | ||
1541 | int count; | |
1542 | struct completion complete; | |
1543 | }; | |
1544 | ||
969ab2ee | 1545 | int usb_sg_init( |
1da177e4 LT |
1546 | struct usb_sg_request *io, |
1547 | struct usb_device *dev, | |
969ab2ee | 1548 | unsigned pipe, |
1da177e4 LT |
1549 | unsigned period, |
1550 | struct scatterlist *sg, | |
1551 | int nents, | |
1552 | size_t length, | |
55016f10 | 1553 | gfp_t mem_flags |
1da177e4 | 1554 | ); |
969ab2ee GKH |
1555 | void usb_sg_cancel(struct usb_sg_request *io); |
1556 | void usb_sg_wait(struct usb_sg_request *io); | |
1da177e4 LT |
1557 | |
1558 | ||
b724ae77 | 1559 | /* ----------------------------------------------------------------------- */ |
1da177e4 LT |
1560 | |
1561 | /* | |
1562 | * For various legacy reasons, Linux has a small cookie that's paired with | |
1563 | * a struct usb_device to identify an endpoint queue. Queue characteristics | |
1564 | * are defined by the endpoint's descriptor. This cookie is called a "pipe", | |
1565 | * an unsigned int encoded as: | |
1566 | * | |
1567 | * - direction: bit 7 (0 = Host-to-Device [Out], | |
1568 | * 1 = Device-to-Host [In] ... | |
1569 | * like endpoint bEndpointAddress) | |
1570 | * - device address: bits 8-14 ... bit positions known to uhci-hcd | |
1571 | * - endpoint: bits 15-18 ... bit positions known to uhci-hcd | |
1572 | * - pipe type: bits 30-31 (00 = isochronous, 01 = interrupt, | |
1573 | * 10 = control, 11 = bulk) | |
1574 | * | |
1575 | * Given the device address and endpoint descriptor, pipes are redundant. | |
1576 | */ | |
1577 | ||
1578 | /* NOTE: these are not the standard USB_ENDPOINT_XFER_* values!! */ | |
1579 | /* (yet ... they're the values used by usbfs) */ | |
1580 | #define PIPE_ISOCHRONOUS 0 | |
1581 | #define PIPE_INTERRUPT 1 | |
1582 | #define PIPE_CONTROL 2 | |
1583 | #define PIPE_BULK 3 | |
1584 | ||
1585 | #define usb_pipein(pipe) ((pipe) & USB_DIR_IN) | |
1586 | #define usb_pipeout(pipe) (!usb_pipein(pipe)) | |
1587 | ||
1588 | #define usb_pipedevice(pipe) (((pipe) >> 8) & 0x7f) | |
1589 | #define usb_pipeendpoint(pipe) (((pipe) >> 15) & 0xf) | |
1590 | ||
1591 | #define usb_pipetype(pipe) (((pipe) >> 30) & 3) | |
1592 | #define usb_pipeisoc(pipe) (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS) | |
1593 | #define usb_pipeint(pipe) (usb_pipetype((pipe)) == PIPE_INTERRUPT) | |
1594 | #define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL) | |
1595 | #define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK) | |
1596 | ||
1597 | /* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */ | |
1598 | #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1) | |
1599 | #define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << (ep))) | |
b724ae77 AS |
1600 | #define usb_settoggle(dev, ep, out, bit) \ |
1601 | ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \ | |
1602 | ((bit) << (ep))) | |
1da177e4 LT |
1603 | |
1604 | ||
b724ae77 AS |
1605 | static inline unsigned int __create_pipe(struct usb_device *dev, |
1606 | unsigned int endpoint) | |
1da177e4 LT |
1607 | { |
1608 | return (dev->devnum << 8) | (endpoint << 15); | |
1609 | } | |
1610 | ||
1611 | /* Create various pipes... */ | |
b724ae77 | 1612 | #define usb_sndctrlpipe(dev,endpoint) \ |
969ab2ee | 1613 | ((PIPE_CONTROL << 30) | __create_pipe(dev, endpoint)) |
b724ae77 | 1614 | #define usb_rcvctrlpipe(dev,endpoint) \ |
969ab2ee | 1615 | ((PIPE_CONTROL << 30) | __create_pipe(dev, endpoint) | USB_DIR_IN) |
b724ae77 | 1616 | #define usb_sndisocpipe(dev,endpoint) \ |
969ab2ee | 1617 | ((PIPE_ISOCHRONOUS << 30) | __create_pipe(dev, endpoint)) |
b724ae77 | 1618 | #define usb_rcvisocpipe(dev,endpoint) \ |
969ab2ee | 1619 | ((PIPE_ISOCHRONOUS << 30) | __create_pipe(dev, endpoint) | USB_DIR_IN) |
b724ae77 | 1620 | #define usb_sndbulkpipe(dev,endpoint) \ |
969ab2ee | 1621 | ((PIPE_BULK << 30) | __create_pipe(dev, endpoint)) |
b724ae77 | 1622 | #define usb_rcvbulkpipe(dev,endpoint) \ |
969ab2ee | 1623 | ((PIPE_BULK << 30) | __create_pipe(dev, endpoint) | USB_DIR_IN) |
b724ae77 | 1624 | #define usb_sndintpipe(dev,endpoint) \ |
969ab2ee | 1625 | ((PIPE_INTERRUPT << 30) | __create_pipe(dev, endpoint)) |
b724ae77 | 1626 | #define usb_rcvintpipe(dev,endpoint) \ |
969ab2ee | 1627 | ((PIPE_INTERRUPT << 30) | __create_pipe(dev, endpoint) | USB_DIR_IN) |
1da177e4 LT |
1628 | |
1629 | /*-------------------------------------------------------------------------*/ | |
1630 | ||
1631 | static inline __u16 | |
1632 | usb_maxpacket(struct usb_device *udev, int pipe, int is_out) | |
1633 | { | |
1634 | struct usb_host_endpoint *ep; | |
1635 | unsigned epnum = usb_pipeendpoint(pipe); | |
1636 | ||
1637 | if (is_out) { | |
1638 | WARN_ON(usb_pipein(pipe)); | |
1639 | ep = udev->ep_out[epnum]; | |
1640 | } else { | |
1641 | WARN_ON(usb_pipeout(pipe)); | |
1642 | ep = udev->ep_in[epnum]; | |
1643 | } | |
1644 | if (!ep) | |
1645 | return 0; | |
1646 | ||
1647 | /* NOTE: only 0x07ff bits are for packet size... */ | |
1648 | return le16_to_cpu(ep->desc.wMaxPacketSize); | |
1649 | } | |
1650 | ||
b724ae77 | 1651 | /* ----------------------------------------------------------------------- */ |
1da177e4 | 1652 | |
3099e75a GKH |
1653 | /* Events from the usb core */ |
1654 | #define USB_DEVICE_ADD 0x0001 | |
1655 | #define USB_DEVICE_REMOVE 0x0002 | |
1656 | #define USB_BUS_ADD 0x0003 | |
1657 | #define USB_BUS_REMOVE 0x0004 | |
1658 | extern void usb_register_notify(struct notifier_block *nb); | |
1659 | extern void usb_unregister_notify(struct notifier_block *nb); | |
1660 | ||
1da177e4 | 1661 | #ifdef DEBUG |
b724ae77 AS |
1662 | #define dbg(format, arg...) printk(KERN_DEBUG "%s: " format "\n" , \ |
1663 | __FILE__ , ## arg) | |
1da177e4 LT |
1664 | #else |
1665 | #define dbg(format, arg...) do {} while (0) | |
1666 | #endif | |
1667 | ||
b724ae77 AS |
1668 | #define err(format, arg...) printk(KERN_ERR "%s: " format "\n" , \ |
1669 | __FILE__ , ## arg) | |
1670 | #define info(format, arg...) printk(KERN_INFO "%s: " format "\n" , \ | |
1671 | __FILE__ , ## arg) | |
1672 | #define warn(format, arg...) printk(KERN_WARNING "%s: " format "\n" , \ | |
1673 | __FILE__ , ## arg) | |
1da177e4 LT |
1674 | |
1675 | ||
1676 | #endif /* __KERNEL__ */ | |
1677 | ||
1678 | #endif |