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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; | |
b1d8dfb0 | 26 | struct wusb_dev; |
1da177e4 LT |
27 | |
28 | /*-------------------------------------------------------------------------*/ | |
29 | ||
30 | /* | |
31 | * Host-side wrappers for standard USB descriptors ... these are parsed | |
32 | * from the data provided by devices. Parsing turns them from a flat | |
33 | * sequence of descriptors into a hierarchy: | |
34 | * | |
35 | * - devices have one (usually) or more configs; | |
36 | * - configs have one (often) or more interfaces; | |
37 | * - interfaces have one (usually) or more settings; | |
38 | * - each interface setting has zero or (usually) more endpoints. | |
663c30d0 | 39 | * - a SuperSpeed endpoint has a companion descriptor |
1da177e4 LT |
40 | * |
41 | * And there might be other descriptors mixed in with those. | |
42 | * | |
43 | * Devices may also have class-specific or vendor-specific descriptors. | |
44 | */ | |
45 | ||
9bde7497 GKH |
46 | struct ep_device; |
47 | ||
663c30d0 SS |
48 | /* For SS devices */ |
49 | /** | |
f0058c62 | 50 | * struct usb_host_ss_ep_comp - Valid for SuperSpeed devices only |
663c30d0 SS |
51 | * @desc: endpoint companion descriptor, wMaxPacketSize in native byteorder |
52 | * @extra: descriptors following this endpoint companion descriptor | |
53 | * @extralen: how many bytes of "extra" are valid | |
54 | */ | |
f0058c62 SS |
55 | struct usb_host_ss_ep_comp { |
56 | struct usb_ss_ep_comp_descriptor desc; | |
57 | unsigned char *extra; /* Extra descriptors */ | |
58 | int extralen; | |
663c30d0 SS |
59 | }; |
60 | ||
1da177e4 LT |
61 | /** |
62 | * struct usb_host_endpoint - host-side endpoint descriptor and queue | |
63 | * @desc: descriptor for this endpoint, wMaxPacketSize in native byteorder | |
64 | * @urb_list: urbs queued to this endpoint; maintained by usbcore | |
65 | * @hcpriv: for use by HCD; typically holds hardware dma queue head (QH) | |
66 | * with one or more transfer descriptors (TDs) per urb | |
7fac9a33 | 67 | * @ep_dev: ep_device for sysfs info |
f0058c62 | 68 | * @ss_ep_comp: companion descriptor information for this endpoint |
1da177e4 LT |
69 | * @extra: descriptors following this endpoint in the configuration |
70 | * @extralen: how many bytes of "extra" are valid | |
bdd016ba | 71 | * @enabled: URBs may be submitted to this endpoint |
1da177e4 LT |
72 | * |
73 | * USB requests are always queued to a given endpoint, identified by a | |
74 | * descriptor within an active interface in a given USB configuration. | |
75 | */ | |
76 | struct usb_host_endpoint { | |
77 | struct usb_endpoint_descriptor desc; | |
78 | struct list_head urb_list; | |
79 | void *hcpriv; | |
9bde7497 | 80 | struct ep_device *ep_dev; /* For sysfs info */ |
f0058c62 | 81 | struct usb_host_ss_ep_comp *ss_ep_comp; /* For SS devices */ |
1da177e4 LT |
82 | |
83 | unsigned char *extra; /* Extra descriptors */ | |
84 | int extralen; | |
bdd016ba | 85 | int enabled; |
1da177e4 LT |
86 | }; |
87 | ||
88 | /* host-side wrapper for one interface setting's parsed descriptors */ | |
89 | struct usb_host_interface { | |
90 | struct usb_interface_descriptor desc; | |
91 | ||
92 | /* array of desc.bNumEndpoint endpoints associated with this | |
93 | * interface setting. these will be in no particular order. | |
94 | */ | |
95 | struct usb_host_endpoint *endpoint; | |
96 | ||
97 | char *string; /* iInterface string, if present */ | |
98 | unsigned char *extra; /* Extra descriptors */ | |
99 | int extralen; | |
100 | }; | |
101 | ||
102 | enum usb_interface_condition { | |
103 | USB_INTERFACE_UNBOUND = 0, | |
104 | USB_INTERFACE_BINDING, | |
105 | USB_INTERFACE_BOUND, | |
106 | USB_INTERFACE_UNBINDING, | |
107 | }; | |
108 | ||
109 | /** | |
110 | * struct usb_interface - what usb device drivers talk to | |
111 | * @altsetting: array of interface structures, one for each alternate | |
112 | * setting that may be selected. Each one includes a set of | |
113 | * endpoint configurations. They will be in no particular order. | |
1da177e4 | 114 | * @cur_altsetting: the current altsetting. |
d6d914f5 | 115 | * @num_altsetting: number of altsettings defined. |
3f423787 | 116 | * @intf_assoc: interface association descriptor |
1da177e4 LT |
117 | * @minor: the minor number assigned to this interface, if this |
118 | * interface is bound to a driver that uses the USB major number. | |
119 | * If this interface does not use the USB major, this field should | |
120 | * be unused. The driver should set this value in the probe() | |
121 | * function of the driver, after it has been assigned a minor | |
122 | * number from the USB core by calling usb_register_dev(). | |
123 | * @condition: binding state of the interface: not bound, binding | |
124 | * (in probe()), bound to a driver, or unbinding (in disconnect()) | |
4d064c08 | 125 | * @is_active: flag set when the interface is bound and not suspended. |
f88ed90d | 126 | * @sysfs_files_created: sysfs attributes exist |
3b23dd6f | 127 | * @ep_devs_created: endpoint child pseudo-devices exist |
352d0263 | 128 | * @unregistering: flag set when the interface is being unregistered |
645daaab AS |
129 | * @needs_remote_wakeup: flag set when the driver requires remote-wakeup |
130 | * capability during autosuspend. | |
55151d7d AS |
131 | * @needs_altsetting0: flag set when a set-interface request for altsetting 0 |
132 | * has been deferred. | |
f4f4d587 AS |
133 | * @needs_binding: flag set when the driver should be re-probed or unbound |
134 | * following a reset or suspend operation it doesn't support. | |
1da177e4 | 135 | * @dev: driver model's view of this device |
0873c764 GKH |
136 | * @usb_dev: if an interface is bound to the USB major, this will point |
137 | * to the sysfs representation for that device. | |
645daaab AS |
138 | * @pm_usage_cnt: PM usage counter for this interface; autosuspend is not |
139 | * allowed unless the counter is 0. | |
dc023dce IPG |
140 | * @reset_ws: Used for scheduling resets from atomic context. |
141 | * @reset_running: set to 1 if the interface is currently running a | |
142 | * queued reset so that usb_cancel_queued_reset() doesn't try to | |
143 | * remove from the workqueue when running inside the worker | |
144 | * thread. See __usb_queue_reset_device(). | |
1da177e4 LT |
145 | * |
146 | * USB device drivers attach to interfaces on a physical device. Each | |
147 | * interface encapsulates a single high level function, such as feeding | |
148 | * an audio stream to a speaker or reporting a change in a volume control. | |
149 | * Many USB devices only have one interface. The protocol used to talk to | |
150 | * an interface's endpoints can be defined in a usb "class" specification, | |
151 | * or by a product's vendor. The (default) control endpoint is part of | |
152 | * every interface, but is never listed among the interface's descriptors. | |
153 | * | |
154 | * The driver that is bound to the interface can use standard driver model | |
155 | * calls such as dev_get_drvdata() on the dev member of this structure. | |
156 | * | |
157 | * Each interface may have alternate settings. The initial configuration | |
158 | * of a device sets altsetting 0, but the device driver can change | |
159 | * that setting using usb_set_interface(). Alternate settings are often | |
59c51591 | 160 | * used to control the use of periodic endpoints, such as by having |
1da177e4 LT |
161 | * different endpoints use different amounts of reserved USB bandwidth. |
162 | * All standards-conformant USB devices that use isochronous endpoints | |
163 | * will use them in non-default settings. | |
164 | * | |
165 | * The USB specification says that alternate setting numbers must run from | |
166 | * 0 to one less than the total number of alternate settings. But some | |
167 | * devices manage to mess this up, and the structures aren't necessarily | |
168 | * stored in numerical order anyhow. Use usb_altnum_to_altsetting() to | |
169 | * look up an alternate setting in the altsetting array based on its number. | |
170 | */ | |
171 | struct usb_interface { | |
172 | /* array of alternate settings for this interface, | |
173 | * stored in no particular order */ | |
174 | struct usb_host_interface *altsetting; | |
175 | ||
176 | struct usb_host_interface *cur_altsetting; /* the currently | |
177 | * active alternate setting */ | |
178 | unsigned num_altsetting; /* number of alternate settings */ | |
179 | ||
165fe97e CN |
180 | /* If there is an interface association descriptor then it will list |
181 | * the associated interfaces */ | |
182 | struct usb_interface_assoc_descriptor *intf_assoc; | |
183 | ||
b724ae77 AS |
184 | int minor; /* minor number this interface is |
185 | * bound to */ | |
1da177e4 | 186 | enum usb_interface_condition condition; /* state of binding */ |
4d064c08 | 187 | unsigned is_active:1; /* the interface is not suspended */ |
7e61559f | 188 | unsigned sysfs_files_created:1; /* the sysfs attributes exist */ |
3b23dd6f | 189 | unsigned ep_devs_created:1; /* endpoint "devices" exist */ |
352d0263 | 190 | unsigned unregistering:1; /* unregistration is in progress */ |
645daaab | 191 | unsigned needs_remote_wakeup:1; /* driver requires remote wakeup */ |
55151d7d | 192 | unsigned needs_altsetting0:1; /* switch to altsetting 0 is pending */ |
78d9a487 | 193 | unsigned needs_binding:1; /* needs delayed unbind/rebind */ |
dc023dce | 194 | unsigned reset_running:1; |
4d064c08 | 195 | |
1da177e4 | 196 | struct device dev; /* interface specific device info */ |
969ab2ee | 197 | struct device *usb_dev; |
ccf5b801 | 198 | atomic_t pm_usage_cnt; /* usage counter for autosuspend */ |
dc023dce | 199 | struct work_struct reset_ws; /* for resets in atomic context */ |
1da177e4 LT |
200 | }; |
201 | #define to_usb_interface(d) container_of(d, struct usb_interface, dev) | |
202 | #define interface_to_usbdev(intf) \ | |
203 | container_of(intf->dev.parent, struct usb_device, dev) | |
204 | ||
969ab2ee | 205 | static inline void *usb_get_intfdata(struct usb_interface *intf) |
1da177e4 | 206 | { |
969ab2ee | 207 | return dev_get_drvdata(&intf->dev); |
1da177e4 LT |
208 | } |
209 | ||
969ab2ee | 210 | static inline void usb_set_intfdata(struct usb_interface *intf, void *data) |
1da177e4 LT |
211 | { |
212 | dev_set_drvdata(&intf->dev, data); | |
213 | } | |
214 | ||
215 | struct usb_interface *usb_get_intf(struct usb_interface *intf); | |
216 | void usb_put_intf(struct usb_interface *intf); | |
217 | ||
218 | /* this maximum is arbitrary */ | |
219 | #define USB_MAXINTERFACES 32 | |
165fe97e | 220 | #define USB_MAXIADS USB_MAXINTERFACES/2 |
1da177e4 LT |
221 | |
222 | /** | |
223 | * struct usb_interface_cache - long-term representation of a device interface | |
224 | * @num_altsetting: number of altsettings defined. | |
225 | * @ref: reference counter. | |
226 | * @altsetting: variable-length array of interface structures, one for | |
227 | * each alternate setting that may be selected. Each one includes a | |
228 | * set of endpoint configurations. They will be in no particular order. | |
229 | * | |
230 | * These structures persist for the lifetime of a usb_device, unlike | |
231 | * struct usb_interface (which persists only as long as its configuration | |
232 | * is installed). The altsetting arrays can be accessed through these | |
233 | * structures at any time, permitting comparison of configurations and | |
234 | * providing support for the /proc/bus/usb/devices pseudo-file. | |
235 | */ | |
236 | struct usb_interface_cache { | |
237 | unsigned num_altsetting; /* number of alternate settings */ | |
238 | struct kref ref; /* reference counter */ | |
239 | ||
240 | /* variable-length array of alternate settings for this interface, | |
241 | * stored in no particular order */ | |
242 | struct usb_host_interface altsetting[0]; | |
243 | }; | |
244 | #define ref_to_usb_interface_cache(r) \ | |
245 | container_of(r, struct usb_interface_cache, ref) | |
246 | #define altsetting_to_usb_interface_cache(a) \ | |
247 | container_of(a, struct usb_interface_cache, altsetting[0]) | |
248 | ||
249 | /** | |
250 | * struct usb_host_config - representation of a device's configuration | |
251 | * @desc: the device's configuration descriptor. | |
252 | * @string: pointer to the cached version of the iConfiguration string, if | |
253 | * present for this configuration. | |
3f423787 | 254 | * @intf_assoc: list of any interface association descriptors in this config |
1da177e4 LT |
255 | * @interface: array of pointers to usb_interface structures, one for each |
256 | * interface in the configuration. The number of interfaces is stored | |
257 | * in desc.bNumInterfaces. These pointers are valid only while the | |
258 | * the configuration is active. | |
259 | * @intf_cache: array of pointers to usb_interface_cache structures, one | |
260 | * for each interface in the configuration. These structures exist | |
261 | * for the entire life of the device. | |
262 | * @extra: pointer to buffer containing all extra descriptors associated | |
263 | * with this configuration (those preceding the first interface | |
264 | * descriptor). | |
265 | * @extralen: length of the extra descriptors buffer. | |
266 | * | |
267 | * USB devices may have multiple configurations, but only one can be active | |
268 | * at any time. Each encapsulates a different operational environment; | |
269 | * for example, a dual-speed device would have separate configurations for | |
270 | * full-speed and high-speed operation. The number of configurations | |
271 | * available is stored in the device descriptor as bNumConfigurations. | |
272 | * | |
273 | * A configuration can contain multiple interfaces. Each corresponds to | |
274 | * a different function of the USB device, and all are available whenever | |
275 | * the configuration is active. The USB standard says that interfaces | |
276 | * are supposed to be numbered from 0 to desc.bNumInterfaces-1, but a lot | |
277 | * of devices get this wrong. In addition, the interface array is not | |
278 | * guaranteed to be sorted in numerical order. Use usb_ifnum_to_if() to | |
279 | * look up an interface entry based on its number. | |
280 | * | |
281 | * Device drivers should not attempt to activate configurations. The choice | |
282 | * of which configuration to install is a policy decision based on such | |
283 | * considerations as available power, functionality provided, and the user's | |
312c004d | 284 | * desires (expressed through userspace tools). However, drivers can call |
1da177e4 LT |
285 | * usb_reset_configuration() to reinitialize the current configuration and |
286 | * all its interfaces. | |
287 | */ | |
288 | struct usb_host_config { | |
289 | struct usb_config_descriptor desc; | |
290 | ||
4f62efe6 | 291 | char *string; /* iConfiguration string, if present */ |
165fe97e CN |
292 | |
293 | /* List of any Interface Association Descriptors in this | |
294 | * configuration. */ | |
295 | struct usb_interface_assoc_descriptor *intf_assoc[USB_MAXIADS]; | |
296 | ||
1da177e4 LT |
297 | /* the interfaces associated with this configuration, |
298 | * stored in no particular order */ | |
299 | struct usb_interface *interface[USB_MAXINTERFACES]; | |
300 | ||
301 | /* Interface information available even when this is not the | |
302 | * active configuration */ | |
303 | struct usb_interface_cache *intf_cache[USB_MAXINTERFACES]; | |
304 | ||
305 | unsigned char *extra; /* Extra descriptors */ | |
306 | int extralen; | |
307 | }; | |
308 | ||
309 | int __usb_get_extra_descriptor(char *buffer, unsigned size, | |
310 | unsigned char type, void **ptr); | |
969ab2ee GKH |
311 | #define usb_get_extra_descriptor(ifpoint, type, ptr) \ |
312 | __usb_get_extra_descriptor((ifpoint)->extra, \ | |
313 | (ifpoint)->extralen, \ | |
314 | type, (void **)ptr) | |
1da177e4 | 315 | |
b724ae77 | 316 | /* ----------------------------------------------------------------------- */ |
1da177e4 | 317 | |
1da177e4 LT |
318 | /* USB device number allocation bitmap */ |
319 | struct usb_devmap { | |
320 | unsigned long devicemap[128 / (8*sizeof(unsigned long))]; | |
321 | }; | |
322 | ||
323 | /* | |
324 | * Allocated per bus (tree of devices) we have: | |
325 | */ | |
326 | struct usb_bus { | |
327 | struct device *controller; /* host/master side hardware */ | |
328 | int busnum; /* Bus number (in order of reg) */ | |
1b26da15 | 329 | const char *bus_name; /* stable id (PCI slot_name etc) */ |
dd990f16 | 330 | u8 uses_dma; /* Does the host controller use DMA? */ |
1da177e4 LT |
331 | u8 otg_port; /* 0, or number of OTG/HNP port */ |
332 | unsigned is_b_host:1; /* true during some HNP roleswitches */ | |
333 | unsigned b_hnp_enable:1; /* OTG: did A-Host enable HNP? */ | |
4c1bd3d7 | 334 | unsigned sg_tablesize; /* 0 or largest number of sg list entries */ |
1da177e4 | 335 | |
b724ae77 AS |
336 | int devnum_next; /* Next open device number in |
337 | * round-robin allocation */ | |
1da177e4 LT |
338 | |
339 | struct usb_devmap devmap; /* device address allocation map */ | |
1da177e4 LT |
340 | struct usb_device *root_hub; /* Root hub */ |
341 | struct list_head bus_list; /* list of busses */ | |
1da177e4 LT |
342 | |
343 | int bandwidth_allocated; /* on this bus: how much of the time | |
344 | * reserved for periodic (intr/iso) | |
345 | * requests is used, on average? | |
346 | * Units: microseconds/frame. | |
347 | * Limits: Full/low speed reserve 90%, | |
348 | * while high speed reserves 80%. | |
349 | */ | |
350 | int bandwidth_int_reqs; /* number of Interrupt requests */ | |
351 | int bandwidth_isoc_reqs; /* number of Isoc. requests */ | |
352 | ||
9f8b17e6 | 353 | #ifdef CONFIG_USB_DEVICEFS |
1da177e4 | 354 | struct dentry *usbfs_dentry; /* usbfs dentry entry for the bus */ |
9f8b17e6 | 355 | #endif |
b724ae77 | 356 | |
f150fa1a | 357 | #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) |
1da177e4 LT |
358 | struct mon_bus *mon_bus; /* non-null when associated */ |
359 | int monitored; /* non-zero when monitored */ | |
360 | #endif | |
361 | }; | |
1da177e4 | 362 | |
b724ae77 | 363 | /* ----------------------------------------------------------------------- */ |
1da177e4 LT |
364 | |
365 | /* This is arbitrary. | |
366 | * From USB 2.0 spec Table 11-13, offset 7, a hub can | |
367 | * have up to 255 ports. The most yet reported is 10. | |
43705251 | 368 | * |
369 | * Current Wireless USB host hardware (Intel i1480 for example) allows | |
370 | * up to 22 devices to connect. Upcoming hardware might raise that | |
371 | * limit. Because the arrays need to add a bit for hub status data, we | |
372 | * do 31, so plus one evens out to four bytes. | |
1da177e4 | 373 | */ |
43705251 | 374 | #define USB_MAXCHILDREN (31) |
1da177e4 LT |
375 | |
376 | struct usb_tt; | |
377 | ||
f476fbab | 378 | /** |
1da177e4 | 379 | * struct usb_device - kernel's representation of a USB device |
f476fbab RD |
380 | * @devnum: device number; address on a USB bus |
381 | * @devpath: device ID string for use in messages (e.g., /port/...) | |
7206b001 | 382 | * @route: tree topology hex string for use with xHCI |
f476fbab RD |
383 | * @state: device state: configured, not attached, etc. |
384 | * @speed: device speed: high/full/low (or error) | |
385 | * @tt: Transaction Translator info; used with low/full speed dev, highspeed hub | |
386 | * @ttport: device port on that tt hub | |
387 | * @toggle: one bit for each endpoint, with ([0] = IN, [1] = OUT) endpoints | |
388 | * @parent: our hub, unless we're the root | |
389 | * @bus: bus we're part of | |
390 | * @ep0: endpoint 0 data (default control pipe) | |
391 | * @dev: generic device interface | |
392 | * @descriptor: USB device descriptor | |
393 | * @config: all of the device's configs | |
394 | * @actconfig: the active configuration | |
395 | * @ep_in: array of IN endpoints | |
396 | * @ep_out: array of OUT endpoints | |
397 | * @rawdescriptors: raw descriptors for each config | |
398 | * @bus_mA: Current available from the bus | |
399 | * @portnum: parent port number (origin 1) | |
400 | * @level: number of USB hub ancestors | |
401 | * @can_submit: URBs may be submitted | |
402 | * @discon_suspended: disconnected while suspended | |
403 | * @persist_enabled: USB_PERSIST enabled for this device | |
404 | * @have_langid: whether string_langid is valid | |
405 | * @authorized: policy has said we can use it; | |
406 | * (user space) policy determines if we authorize this device to be | |
407 | * used or not. By default, wired USB devices are authorized. | |
408 | * WUSB devices are not, until we authorize them from user space. | |
409 | * FIXME -- complete doc | |
3b52f128 | 410 | * @authenticated: Crypto authentication passed |
f476fbab RD |
411 | * @wusb: device is Wireless USB |
412 | * @string_langid: language ID for strings | |
413 | * @product: iProduct string, if present (static) | |
414 | * @manufacturer: iManufacturer string, if present (static) | |
415 | * @serial: iSerialNumber string, if present (static) | |
416 | * @filelist: usbfs files that are open to this device | |
417 | * @usb_classdev: USB class device that was created for usbfs device | |
418 | * access from userspace | |
419 | * @usbfs_dentry: usbfs dentry entry for the device | |
420 | * @maxchild: number of ports if hub | |
421 | * @children: child devices - USB devices that are attached to this hub | |
422 | * @pm_usage_cnt: usage counter for autosuspend | |
423 | * @quirks: quirks of the whole device | |
424 | * @urbnum: number of URBs submitted for the whole device | |
425 | * @active_duration: total time device is not suspended | |
426 | * @autosuspend: for delayed autosuspends | |
9ac39f28 | 427 | * @autoresume: for autoresumes requested while in_interrupt |
f476fbab RD |
428 | * @pm_mutex: protects PM operations |
429 | * @last_busy: time of last use | |
430 | * @autosuspend_delay: in jiffies | |
431 | * @connect_time: time device was first connected | |
f476fbab RD |
432 | * @do_remote_wakeup: remote wakeup should be enabled |
433 | * @reset_resume: needs reset instead of resume | |
434 | * @autosuspend_disabled: autosuspend disabled by the user | |
f476fbab | 435 | * @skip_sys_resume: skip the next system resume |
11e76ae0 IPG |
436 | * @wusb_dev: if this is a Wireless USB device, link to the WUSB |
437 | * specific data for the device. | |
c6515272 | 438 | * @slot_id: Slot ID assigned by xHCI |
1da177e4 | 439 | * |
f476fbab | 440 | * Notes: |
1da177e4 LT |
441 | * Usbcore drivers should not set usbdev->state directly. Instead use |
442 | * usb_set_device_state(). | |
443 | */ | |
444 | struct usb_device { | |
f476fbab RD |
445 | int devnum; |
446 | char devpath [16]; | |
7206b001 | 447 | u32 route; |
f476fbab RD |
448 | enum usb_device_state state; |
449 | enum usb_device_speed speed; | |
1da177e4 | 450 | |
f476fbab RD |
451 | struct usb_tt *tt; |
452 | int ttport; | |
1da177e4 | 453 | |
f476fbab | 454 | unsigned int toggle[2]; |
1da177e4 | 455 | |
f476fbab RD |
456 | struct usb_device *parent; |
457 | struct usb_bus *bus; | |
1da177e4 LT |
458 | struct usb_host_endpoint ep0; |
459 | ||
f476fbab | 460 | struct device dev; |
1da177e4 | 461 | |
f476fbab RD |
462 | struct usb_device_descriptor descriptor; |
463 | struct usb_host_config *config; | |
1da177e4 | 464 | |
f476fbab | 465 | struct usb_host_config *actconfig; |
1da177e4 LT |
466 | struct usb_host_endpoint *ep_in[16]; |
467 | struct usb_host_endpoint *ep_out[16]; | |
468 | ||
f476fbab | 469 | char **rawdescriptors; |
1da177e4 | 470 | |
f476fbab RD |
471 | unsigned short bus_mA; |
472 | u8 portnum; | |
473 | u8 level; | |
55c52718 | 474 | |
f476fbab RD |
475 | unsigned can_submit:1; |
476 | unsigned discon_suspended:1; | |
477 | unsigned persist_enabled:1; | |
478 | unsigned have_langid:1; | |
479 | unsigned authorized:1; | |
3b52f128 | 480 | unsigned authenticated:1; |
f476fbab RD |
481 | unsigned wusb:1; |
482 | int string_langid; | |
1da177e4 | 483 | |
4f62efe6 | 484 | /* static strings from the device */ |
f476fbab RD |
485 | char *product; |
486 | char *manufacturer; | |
487 | char *serial; | |
4f62efe6 | 488 | |
1da177e4 | 489 | struct list_head filelist; |
9f8b17e6 KS |
490 | #ifdef CONFIG_USB_DEVICE_CLASS |
491 | struct device *usb_classdev; | |
492 | #endif | |
493 | #ifdef CONFIG_USB_DEVICEFS | |
f476fbab | 494 | struct dentry *usbfs_dentry; |
9f8b17e6 | 495 | #endif |
1da177e4 | 496 | |
f476fbab | 497 | int maxchild; |
1da177e4 | 498 | struct usb_device *children[USB_MAXCHILDREN]; |
645daaab | 499 | |
f476fbab RD |
500 | int pm_usage_cnt; |
501 | u32 quirks; | |
502 | atomic_t urbnum; | |
b5e795f8 | 503 | |
f476fbab | 504 | unsigned long active_duration; |
15123006 | 505 | |
645daaab | 506 | #ifdef CONFIG_PM |
f476fbab | 507 | struct delayed_work autosuspend; |
9ac39f28 | 508 | struct work_struct autoresume; |
f476fbab RD |
509 | struct mutex pm_mutex; |
510 | ||
511 | unsigned long last_busy; | |
512 | int autosuspend_delay; | |
513 | unsigned long connect_time; | |
514 | ||
f476fbab RD |
515 | unsigned do_remote_wakeup:1; |
516 | unsigned reset_resume:1; | |
517 | unsigned autosuspend_disabled:1; | |
f476fbab | 518 | unsigned skip_sys_resume:1; |
645daaab | 519 | #endif |
b1d8dfb0 | 520 | struct wusb_dev *wusb_dev; |
c6515272 | 521 | int slot_id; |
1da177e4 LT |
522 | }; |
523 | #define to_usb_device(d) container_of(d, struct usb_device, dev) | |
524 | ||
525 | extern struct usb_device *usb_get_dev(struct usb_device *dev); | |
526 | extern void usb_put_dev(struct usb_device *dev); | |
527 | ||
9ad3d6cc AS |
528 | /* USB device locking */ |
529 | #define usb_lock_device(udev) down(&(udev)->dev.sem) | |
530 | #define usb_unlock_device(udev) up(&(udev)->dev.sem) | |
531 | #define usb_trylock_device(udev) down_trylock(&(udev)->dev.sem) | |
1da177e4 | 532 | extern int usb_lock_device_for_reset(struct usb_device *udev, |
095bc335 | 533 | const struct usb_interface *iface); |
1da177e4 LT |
534 | |
535 | /* USB port reset for device reinitialization */ | |
536 | extern int usb_reset_device(struct usb_device *dev); | |
dc023dce | 537 | extern void usb_queue_reset_device(struct usb_interface *dev); |
1da177e4 LT |
538 | |
539 | extern struct usb_device *usb_find_device(u16 vendor_id, u16 product_id); | |
540 | ||
645daaab AS |
541 | /* USB autosuspend and autoresume */ |
542 | #ifdef CONFIG_USB_SUSPEND | |
543 | extern int usb_autopm_get_interface(struct usb_interface *intf); | |
544 | extern void usb_autopm_put_interface(struct usb_interface *intf); | |
9ac39f28 AS |
545 | extern int usb_autopm_get_interface_async(struct usb_interface *intf); |
546 | extern void usb_autopm_put_interface_async(struct usb_interface *intf); | |
645daaab | 547 | |
8e4ceb38 AS |
548 | static inline void usb_autopm_get_interface_no_resume( |
549 | struct usb_interface *intf) | |
692a186c | 550 | { |
8e4ceb38 | 551 | atomic_inc(&intf->pm_usage_cnt); |
692a186c | 552 | } |
8e4ceb38 AS |
553 | static inline void usb_autopm_put_interface_no_suspend( |
554 | struct usb_interface *intf) | |
692a186c | 555 | { |
8e4ceb38 | 556 | atomic_dec(&intf->pm_usage_cnt); |
692a186c AS |
557 | } |
558 | ||
1941044a AS |
559 | static inline void usb_mark_last_busy(struct usb_device *udev) |
560 | { | |
561 | udev->last_busy = jiffies; | |
562 | } | |
563 | ||
645daaab | 564 | #else |
645daaab | 565 | |
692a186c AS |
566 | static inline int usb_autopm_get_interface(struct usb_interface *intf) |
567 | { return 0; } | |
9ac39f28 AS |
568 | static inline int usb_autopm_get_interface_async(struct usb_interface *intf) |
569 | { return 0; } | |
570 | ||
692a186c AS |
571 | static inline void usb_autopm_put_interface(struct usb_interface *intf) |
572 | { } | |
9ac39f28 AS |
573 | static inline void usb_autopm_put_interface_async(struct usb_interface *intf) |
574 | { } | |
8e4ceb38 AS |
575 | static inline void usb_autopm_get_interface_no_resume( |
576 | struct usb_interface *intf) | |
692a186c | 577 | { } |
8e4ceb38 AS |
578 | static inline void usb_autopm_put_interface_no_suspend( |
579 | struct usb_interface *intf) | |
692a186c | 580 | { } |
1941044a AS |
581 | static inline void usb_mark_last_busy(struct usb_device *udev) |
582 | { } | |
692a186c | 583 | #endif |
645daaab | 584 | |
1da177e4 LT |
585 | /*-------------------------------------------------------------------------*/ |
586 | ||
587 | /* for drivers using iso endpoints */ | |
969ab2ee | 588 | extern int usb_get_current_frame_number(struct usb_device *usb_dev); |
1da177e4 LT |
589 | |
590 | /* used these for multi-interface device registration */ | |
591 | extern int usb_driver_claim_interface(struct usb_driver *driver, | |
969ab2ee | 592 | struct usb_interface *iface, void *priv); |
1da177e4 LT |
593 | |
594 | /** | |
595 | * usb_interface_claimed - returns true iff an interface is claimed | |
596 | * @iface: the interface being checked | |
597 | * | |
598 | * Returns true (nonzero) iff the interface is claimed, else false (zero). | |
599 | * Callers must own the driver model's usb bus readlock. So driver | |
600 | * probe() entries don't need extra locking, but other call contexts | |
601 | * may need to explicitly claim that lock. | |
602 | * | |
603 | */ | |
969ab2ee GKH |
604 | static inline int usb_interface_claimed(struct usb_interface *iface) |
605 | { | |
1da177e4 LT |
606 | return (iface->dev.driver != NULL); |
607 | } | |
608 | ||
609 | extern void usb_driver_release_interface(struct usb_driver *driver, | |
610 | struct usb_interface *iface); | |
611 | const struct usb_device_id *usb_match_id(struct usb_interface *interface, | |
612 | const struct usb_device_id *id); | |
93bacefc GKH |
613 | extern int usb_match_one_id(struct usb_interface *interface, |
614 | const struct usb_device_id *id); | |
1da177e4 LT |
615 | |
616 | extern struct usb_interface *usb_find_interface(struct usb_driver *drv, | |
617 | int minor); | |
095bc335 | 618 | extern struct usb_interface *usb_ifnum_to_if(const struct usb_device *dev, |
1da177e4 LT |
619 | unsigned ifnum); |
620 | extern struct usb_host_interface *usb_altnum_to_altsetting( | |
095bc335 | 621 | const struct usb_interface *intf, unsigned int altnum); |
91017f9c SS |
622 | extern struct usb_host_interface *usb_find_alt_setting( |
623 | struct usb_host_config *config, | |
624 | unsigned int iface_num, | |
625 | unsigned int alt_num); | |
1da177e4 LT |
626 | |
627 | ||
628 | /** | |
629 | * usb_make_path - returns stable device path in the usb tree | |
630 | * @dev: the device whose path is being constructed | |
631 | * @buf: where to put the string | |
632 | * @size: how big is "buf"? | |
633 | * | |
634 | * Returns length of the string (> 0) or negative if size was too small. | |
635 | * | |
636 | * This identifier is intended to be "stable", reflecting physical paths in | |
637 | * hardware such as physical bus addresses for host controllers or ports on | |
638 | * USB hubs. That makes it stay the same until systems are physically | |
639 | * reconfigured, by re-cabling a tree of USB devices or by moving USB host | |
640 | * controllers. Adding and removing devices, including virtual root hubs | |
641 | * in host controller driver modules, does not change these path identifers; | |
642 | * neither does rebooting or re-enumerating. These are more useful identifiers | |
643 | * than changeable ("unstable") ones like bus numbers or device addresses. | |
644 | * | |
645 | * With a partial exception for devices connected to USB 2.0 root hubs, these | |
646 | * identifiers are also predictable. So long as the device tree isn't changed, | |
647 | * plugging any USB device into a given hub port always gives it the same path. | |
648 | * Because of the use of "companion" controllers, devices connected to ports on | |
649 | * USB 2.0 root hubs (EHCI host controllers) will get one path ID if they are | |
650 | * high speed, and a different one if they are full or low speed. | |
651 | */ | |
969ab2ee | 652 | static inline int usb_make_path(struct usb_device *dev, char *buf, size_t size) |
1da177e4 LT |
653 | { |
654 | int actual; | |
969ab2ee GKH |
655 | actual = snprintf(buf, size, "usb-%s-%s", dev->bus->bus_name, |
656 | dev->devpath); | |
1da177e4 LT |
657 | return (actual >= (int)size) ? -1 : actual; |
658 | } | |
659 | ||
660 | /*-------------------------------------------------------------------------*/ | |
661 | ||
b724ae77 AS |
662 | #define USB_DEVICE_ID_MATCH_DEVICE \ |
663 | (USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_PRODUCT) | |
664 | #define USB_DEVICE_ID_MATCH_DEV_RANGE \ | |
665 | (USB_DEVICE_ID_MATCH_DEV_LO | USB_DEVICE_ID_MATCH_DEV_HI) | |
666 | #define USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION \ | |
667 | (USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_DEV_RANGE) | |
1da177e4 | 668 | #define USB_DEVICE_ID_MATCH_DEV_INFO \ |
b724ae77 AS |
669 | (USB_DEVICE_ID_MATCH_DEV_CLASS | \ |
670 | USB_DEVICE_ID_MATCH_DEV_SUBCLASS | \ | |
671 | USB_DEVICE_ID_MATCH_DEV_PROTOCOL) | |
1da177e4 | 672 | #define USB_DEVICE_ID_MATCH_INT_INFO \ |
b724ae77 AS |
673 | (USB_DEVICE_ID_MATCH_INT_CLASS | \ |
674 | USB_DEVICE_ID_MATCH_INT_SUBCLASS | \ | |
675 | USB_DEVICE_ID_MATCH_INT_PROTOCOL) | |
1da177e4 LT |
676 | |
677 | /** | |
678 | * USB_DEVICE - macro used to describe a specific usb device | |
679 | * @vend: the 16 bit USB Vendor ID | |
680 | * @prod: the 16 bit USB Product ID | |
681 | * | |
682 | * This macro is used to create a struct usb_device_id that matches a | |
683 | * specific device. | |
684 | */ | |
685 | #define USB_DEVICE(vend,prod) \ | |
969ab2ee GKH |
686 | .match_flags = USB_DEVICE_ID_MATCH_DEVICE, \ |
687 | .idVendor = (vend), \ | |
688 | .idProduct = (prod) | |
1da177e4 | 689 | /** |
d0bcabcd | 690 | * USB_DEVICE_VER - describe a specific usb device with a version range |
1da177e4 LT |
691 | * @vend: the 16 bit USB Vendor ID |
692 | * @prod: the 16 bit USB Product ID | |
693 | * @lo: the bcdDevice_lo value | |
694 | * @hi: the bcdDevice_hi value | |
695 | * | |
696 | * This macro is used to create a struct usb_device_id that matches a | |
697 | * specific device, with a version range. | |
698 | */ | |
969ab2ee | 699 | #define USB_DEVICE_VER(vend, prod, lo, hi) \ |
b724ae77 | 700 | .match_flags = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION, \ |
969ab2ee GKH |
701 | .idVendor = (vend), \ |
702 | .idProduct = (prod), \ | |
703 | .bcdDevice_lo = (lo), \ | |
704 | .bcdDevice_hi = (hi) | |
1da177e4 | 705 | |
f836ac80 | 706 | /** |
d0bcabcd | 707 | * USB_DEVICE_INTERFACE_PROTOCOL - describe a usb device with a specific interface protocol |
f836ac80 JK |
708 | * @vend: the 16 bit USB Vendor ID |
709 | * @prod: the 16 bit USB Product ID | |
710 | * @pr: bInterfaceProtocol value | |
711 | * | |
712 | * This macro is used to create a struct usb_device_id that matches a | |
713 | * specific interface protocol of devices. | |
714 | */ | |
969ab2ee GKH |
715 | #define USB_DEVICE_INTERFACE_PROTOCOL(vend, prod, pr) \ |
716 | .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \ | |
717 | USB_DEVICE_ID_MATCH_INT_PROTOCOL, \ | |
f836ac80 JK |
718 | .idVendor = (vend), \ |
719 | .idProduct = (prod), \ | |
720 | .bInterfaceProtocol = (pr) | |
721 | ||
1da177e4 LT |
722 | /** |
723 | * USB_DEVICE_INFO - macro used to describe a class of usb devices | |
724 | * @cl: bDeviceClass value | |
725 | * @sc: bDeviceSubClass value | |
726 | * @pr: bDeviceProtocol value | |
727 | * | |
728 | * This macro is used to create a struct usb_device_id that matches a | |
729 | * specific class of devices. | |
730 | */ | |
969ab2ee GKH |
731 | #define USB_DEVICE_INFO(cl, sc, pr) \ |
732 | .match_flags = USB_DEVICE_ID_MATCH_DEV_INFO, \ | |
733 | .bDeviceClass = (cl), \ | |
734 | .bDeviceSubClass = (sc), \ | |
735 | .bDeviceProtocol = (pr) | |
1da177e4 LT |
736 | |
737 | /** | |
969ab2ee | 738 | * USB_INTERFACE_INFO - macro used to describe a class of usb interfaces |
1da177e4 LT |
739 | * @cl: bInterfaceClass value |
740 | * @sc: bInterfaceSubClass value | |
741 | * @pr: bInterfaceProtocol value | |
742 | * | |
743 | * This macro is used to create a struct usb_device_id that matches a | |
744 | * specific class of interfaces. | |
745 | */ | |
969ab2ee GKH |
746 | #define USB_INTERFACE_INFO(cl, sc, pr) \ |
747 | .match_flags = USB_DEVICE_ID_MATCH_INT_INFO, \ | |
748 | .bInterfaceClass = (cl), \ | |
749 | .bInterfaceSubClass = (sc), \ | |
750 | .bInterfaceProtocol = (pr) | |
8538f96a DD |
751 | |
752 | /** | |
d0bcabcd | 753 | * USB_DEVICE_AND_INTERFACE_INFO - describe a specific usb device with a class of usb interfaces |
8538f96a DD |
754 | * @vend: the 16 bit USB Vendor ID |
755 | * @prod: the 16 bit USB Product ID | |
756 | * @cl: bInterfaceClass value | |
757 | * @sc: bInterfaceSubClass value | |
758 | * @pr: bInterfaceProtocol value | |
759 | * | |
760 | * This macro is used to create a struct usb_device_id that matches a | |
761 | * specific device with a specific class of interfaces. | |
762 | * | |
763 | * This is especially useful when explicitly matching devices that have | |
764 | * vendor specific bDeviceClass values, but standards-compliant interfaces. | |
765 | */ | |
969ab2ee | 766 | #define USB_DEVICE_AND_INTERFACE_INFO(vend, prod, cl, sc, pr) \ |
8538f96a DD |
767 | .match_flags = USB_DEVICE_ID_MATCH_INT_INFO \ |
768 | | USB_DEVICE_ID_MATCH_DEVICE, \ | |
969ab2ee GKH |
769 | .idVendor = (vend), \ |
770 | .idProduct = (prod), \ | |
8538f96a | 771 | .bInterfaceClass = (cl), \ |
969ab2ee GKH |
772 | .bInterfaceSubClass = (sc), \ |
773 | .bInterfaceProtocol = (pr) | |
1da177e4 | 774 | |
b724ae77 | 775 | /* ----------------------------------------------------------------------- */ |
1da177e4 | 776 | |
93bacefc | 777 | /* Stuff for dynamic usb ids */ |
733260ff GKH |
778 | struct usb_dynids { |
779 | spinlock_t lock; | |
780 | struct list_head list; | |
781 | }; | |
782 | ||
93bacefc GKH |
783 | struct usb_dynid { |
784 | struct list_head node; | |
785 | struct usb_device_id id; | |
786 | }; | |
787 | ||
788 | extern ssize_t usb_store_new_id(struct usb_dynids *dynids, | |
789 | struct device_driver *driver, | |
790 | const char *buf, size_t count); | |
791 | ||
1da177e4 | 792 | /** |
8bb54ab5 AS |
793 | * struct usbdrv_wrap - wrapper for driver-model structure |
794 | * @driver: The driver-model core driver structure. | |
795 | * @for_devices: Non-zero for device drivers, 0 for interface drivers. | |
796 | */ | |
797 | struct usbdrv_wrap { | |
798 | struct device_driver driver; | |
799 | int for_devices; | |
800 | }; | |
801 | ||
802 | /** | |
803 | * struct usb_driver - identifies USB interface driver to usbcore | |
1da177e4 LT |
804 | * @name: The driver name should be unique among USB drivers, |
805 | * and should normally be the same as the module name. | |
806 | * @probe: Called to see if the driver is willing to manage a particular | |
807 | * interface on a device. If it is, probe returns zero and uses | |
7ef4f060 | 808 | * usb_set_intfdata() to associate driver-specific data with the |
1da177e4 LT |
809 | * interface. It may also use usb_set_interface() to specify the |
810 | * appropriate altsetting. If unwilling to manage the interface, | |
7ef4f060 ON |
811 | * return -ENODEV, if genuine IO errors occured, an appropriate |
812 | * negative errno value. | |
1da177e4 LT |
813 | * @disconnect: Called when the interface is no longer accessible, usually |
814 | * because its device has been (or is being) disconnected or the | |
815 | * driver module is being unloaded. | |
816 | * @ioctl: Used for drivers that want to talk to userspace through | |
817 | * the "usbfs" filesystem. This lets devices provide ways to | |
818 | * expose information to user space regardless of where they | |
819 | * do (or don't) show up otherwise in the filesystem. | |
820 | * @suspend: Called when the device is going to be suspended by the system. | |
821 | * @resume: Called when the device is being resumed by the system. | |
f07600cf AS |
822 | * @reset_resume: Called when the suspended device has been reset instead |
823 | * of being resumed. | |
742120c6 | 824 | * @pre_reset: Called by usb_reset_device() when the device |
79efa097 | 825 | * is about to be reset. |
742120c6 | 826 | * @post_reset: Called by usb_reset_device() after the device |
7ef4f060 | 827 | * has been reset |
1da177e4 LT |
828 | * @id_table: USB drivers use ID table to support hotplugging. |
829 | * Export this with MODULE_DEVICE_TABLE(usb,...). This must be set | |
830 | * or your driver's probe function will never get called. | |
733260ff GKH |
831 | * @dynids: used internally to hold the list of dynamically added device |
832 | * ids for this driver. | |
8bb54ab5 | 833 | * @drvwrap: Driver-model core structure wrapper. |
ba9dc657 GKH |
834 | * @no_dynamic_id: if set to 1, the USB core will not allow dynamic ids to be |
835 | * added to this driver by preventing the sysfs file from being created. | |
645daaab AS |
836 | * @supports_autosuspend: if set to 0, the USB core will not allow autosuspend |
837 | * for interfaces bound to this driver. | |
9da82bd4 AS |
838 | * @soft_unbind: if set to 1, the USB core will not kill URBs and disable |
839 | * endpoints before calling the driver's disconnect method. | |
1da177e4 | 840 | * |
8bb54ab5 AS |
841 | * USB interface drivers must provide a name, probe() and disconnect() |
842 | * methods, and an id_table. Other driver fields are optional. | |
1da177e4 LT |
843 | * |
844 | * The id_table is used in hotplugging. It holds a set of descriptors, | |
845 | * and specialized data may be associated with each entry. That table | |
846 | * is used by both user and kernel mode hotplugging support. | |
847 | * | |
848 | * The probe() and disconnect() methods are called in a context where | |
849 | * they can sleep, but they should avoid abusing the privilege. Most | |
850 | * work to connect to a device should be done when the device is opened, | |
851 | * and undone at the last close. The disconnect code needs to address | |
852 | * concurrency issues with respect to open() and close() methods, as | |
853 | * well as forcing all pending I/O requests to complete (by unlinking | |
854 | * them as necessary, and blocking until the unlinks complete). | |
855 | */ | |
856 | struct usb_driver { | |
1da177e4 LT |
857 | const char *name; |
858 | ||
859 | int (*probe) (struct usb_interface *intf, | |
860 | const struct usb_device_id *id); | |
861 | ||
862 | void (*disconnect) (struct usb_interface *intf); | |
863 | ||
b724ae77 AS |
864 | int (*ioctl) (struct usb_interface *intf, unsigned int code, |
865 | void *buf); | |
1da177e4 | 866 | |
27d72e85 | 867 | int (*suspend) (struct usb_interface *intf, pm_message_t message); |
1da177e4 | 868 | int (*resume) (struct usb_interface *intf); |
f07600cf | 869 | int (*reset_resume)(struct usb_interface *intf); |
1da177e4 | 870 | |
f07600cf AS |
871 | int (*pre_reset)(struct usb_interface *intf); |
872 | int (*post_reset)(struct usb_interface *intf); | |
79efa097 | 873 | |
1da177e4 LT |
874 | const struct usb_device_id *id_table; |
875 | ||
733260ff | 876 | struct usb_dynids dynids; |
8bb54ab5 | 877 | struct usbdrv_wrap drvwrap; |
ba9dc657 | 878 | unsigned int no_dynamic_id:1; |
645daaab | 879 | unsigned int supports_autosuspend:1; |
9da82bd4 | 880 | unsigned int soft_unbind:1; |
1da177e4 | 881 | }; |
8bb54ab5 AS |
882 | #define to_usb_driver(d) container_of(d, struct usb_driver, drvwrap.driver) |
883 | ||
884 | /** | |
885 | * struct usb_device_driver - identifies USB device driver to usbcore | |
886 | * @name: The driver name should be unique among USB drivers, | |
887 | * and should normally be the same as the module name. | |
888 | * @probe: Called to see if the driver is willing to manage a particular | |
889 | * device. If it is, probe returns zero and uses dev_set_drvdata() | |
890 | * to associate driver-specific data with the device. If unwilling | |
891 | * to manage the device, return a negative errno value. | |
892 | * @disconnect: Called when the device is no longer accessible, usually | |
893 | * because it has been (or is being) disconnected or the driver's | |
894 | * module is being unloaded. | |
895 | * @suspend: Called when the device is going to be suspended by the system. | |
896 | * @resume: Called when the device is being resumed by the system. | |
897 | * @drvwrap: Driver-model core structure wrapper. | |
645daaab AS |
898 | * @supports_autosuspend: if set to 0, the USB core will not allow autosuspend |
899 | * for devices bound to this driver. | |
8bb54ab5 AS |
900 | * |
901 | * USB drivers must provide all the fields listed above except drvwrap. | |
902 | */ | |
903 | struct usb_device_driver { | |
904 | const char *name; | |
905 | ||
906 | int (*probe) (struct usb_device *udev); | |
907 | void (*disconnect) (struct usb_device *udev); | |
908 | ||
909 | int (*suspend) (struct usb_device *udev, pm_message_t message); | |
65bfd296 | 910 | int (*resume) (struct usb_device *udev, pm_message_t message); |
8bb54ab5 | 911 | struct usbdrv_wrap drvwrap; |
645daaab | 912 | unsigned int supports_autosuspend:1; |
8bb54ab5 AS |
913 | }; |
914 | #define to_usb_device_driver(d) container_of(d, struct usb_device_driver, \ | |
915 | drvwrap.driver) | |
1da177e4 LT |
916 | |
917 | extern struct bus_type usb_bus_type; | |
918 | ||
919 | /** | |
920 | * struct usb_class_driver - identifies a USB driver that wants to use the USB major number | |
d6e5bcf4 | 921 | * @name: the usb class device name for this driver. Will show up in sysfs. |
e454cea2 | 922 | * @devnode: Callback to provide a naming hint for a possible |
e376bbbb | 923 | * device node to create. |
1da177e4 | 924 | * @fops: pointer to the struct file_operations of this driver. |
1da177e4 LT |
925 | * @minor_base: the start of the minor range for this driver. |
926 | * | |
927 | * This structure is used for the usb_register_dev() and | |
928 | * usb_unregister_dev() functions, to consolidate a number of the | |
929 | * parameters used for them. | |
930 | */ | |
931 | struct usb_class_driver { | |
932 | char *name; | |
e454cea2 | 933 | char *(*devnode)(struct device *dev, mode_t *mode); |
99ac48f5 | 934 | const struct file_operations *fops; |
d6e5bcf4 | 935 | int minor_base; |
1da177e4 LT |
936 | }; |
937 | ||
938 | /* | |
939 | * use these in module_init()/module_exit() | |
940 | * and don't forget MODULE_DEVICE_TABLE(usb, ...) | |
941 | */ | |
80f745fb GKH |
942 | extern int usb_register_driver(struct usb_driver *, struct module *, |
943 | const char *); | |
2143acc6 GKH |
944 | static inline int usb_register(struct usb_driver *driver) |
945 | { | |
80f745fb | 946 | return usb_register_driver(driver, THIS_MODULE, KBUILD_MODNAME); |
2143acc6 | 947 | } |
1da177e4 LT |
948 | extern void usb_deregister(struct usb_driver *); |
949 | ||
8bb54ab5 AS |
950 | extern int usb_register_device_driver(struct usb_device_driver *, |
951 | struct module *); | |
952 | extern void usb_deregister_device_driver(struct usb_device_driver *); | |
953 | ||
1da177e4 LT |
954 | extern int usb_register_dev(struct usb_interface *intf, |
955 | struct usb_class_driver *class_driver); | |
956 | extern void usb_deregister_dev(struct usb_interface *intf, | |
957 | struct usb_class_driver *class_driver); | |
958 | ||
959 | extern int usb_disabled(void); | |
960 | ||
b724ae77 | 961 | /* ----------------------------------------------------------------------- */ |
1da177e4 LT |
962 | |
963 | /* | |
964 | * URB support, for asynchronous request completions | |
965 | */ | |
966 | ||
967 | /* | |
968 | * urb->transfer_flags: | |
fea34091 AS |
969 | * |
970 | * Note: URB_DIR_IN/OUT is automatically set in usb_submit_urb(). | |
1da177e4 LT |
971 | */ |
972 | #define URB_SHORT_NOT_OK 0x0001 /* report short reads as errors */ | |
b724ae77 AS |
973 | #define URB_ISO_ASAP 0x0002 /* iso-only, urb->start_frame |
974 | * ignored */ | |
1da177e4 LT |
975 | #define URB_NO_TRANSFER_DMA_MAP 0x0004 /* urb->transfer_dma valid on submit */ |
976 | #define URB_NO_SETUP_DMA_MAP 0x0008 /* urb->setup_dma valid on submit */ | |
1da177e4 | 977 | #define URB_NO_FSBR 0x0020 /* UHCI-specific */ |
b724ae77 AS |
978 | #define URB_ZERO_PACKET 0x0040 /* Finish bulk OUT with short packet */ |
979 | #define URB_NO_INTERRUPT 0x0080 /* HINT: no non-error interrupt | |
980 | * needed */ | |
8b3b01c8 | 981 | #define URB_FREE_BUFFER 0x0100 /* Free transfer buffer with the URB */ |
1da177e4 | 982 | |
fea34091 AS |
983 | #define URB_DIR_IN 0x0200 /* Transfer from device to host */ |
984 | #define URB_DIR_OUT 0 | |
985 | #define URB_DIR_MASK URB_DIR_IN | |
986 | ||
1da177e4 LT |
987 | struct usb_iso_packet_descriptor { |
988 | unsigned int offset; | |
989 | unsigned int length; /* expected length */ | |
990 | unsigned int actual_length; | |
d1bbb600 | 991 | int status; |
1da177e4 LT |
992 | }; |
993 | ||
994 | struct urb; | |
1da177e4 | 995 | |
51a2f077 ON |
996 | struct usb_anchor { |
997 | struct list_head urb_list; | |
998 | wait_queue_head_t wait; | |
999 | spinlock_t lock; | |
6a2839be | 1000 | unsigned int poisoned:1; |
51a2f077 ON |
1001 | }; |
1002 | ||
1003 | static inline void init_usb_anchor(struct usb_anchor *anchor) | |
1004 | { | |
1005 | INIT_LIST_HEAD(&anchor->urb_list); | |
1006 | init_waitqueue_head(&anchor->wait); | |
1007 | spin_lock_init(&anchor->lock); | |
1008 | } | |
1009 | ||
7d12e780 | 1010 | typedef void (*usb_complete_t)(struct urb *); |
1da177e4 LT |
1011 | |
1012 | /** | |
1013 | * struct urb - USB Request Block | |
1014 | * @urb_list: For use by current owner of the URB. | |
51a2f077 ON |
1015 | * @anchor_list: membership in the list of an anchor |
1016 | * @anchor: to anchor URBs to a common mooring | |
5b653c79 AS |
1017 | * @ep: Points to the endpoint's data structure. Will eventually |
1018 | * replace @pipe. | |
1da177e4 LT |
1019 | * @pipe: Holds endpoint number, direction, type, and more. |
1020 | * Create these values with the eight macros available; | |
1021 | * usb_{snd,rcv}TYPEpipe(dev,endpoint), where the TYPE is "ctrl" | |
1022 | * (control), "bulk", "int" (interrupt), or "iso" (isochronous). | |
1023 | * For example usb_sndbulkpipe() or usb_rcvintpipe(). Endpoint | |
1024 | * numbers range from zero to fifteen. Note that "in" endpoint two | |
1025 | * is a different endpoint (and pipe) from "out" endpoint two. | |
1026 | * The current configuration controls the existence, type, and | |
1027 | * maximum packet size of any given endpoint. | |
1028 | * @dev: Identifies the USB device to perform the request. | |
1029 | * @status: This is read in non-iso completion functions to get the | |
1030 | * status of the particular request. ISO requests only use it | |
1031 | * to tell whether the URB was unlinked; detailed status for | |
1032 | * each frame is in the fields of the iso_frame-desc. | |
1033 | * @transfer_flags: A variety of flags may be used to affect how URB | |
1034 | * submission, unlinking, or operation are handled. Different | |
1035 | * kinds of URB can use different flags. | |
4e9e9200 PZ |
1036 | * @transfer_buffer: This identifies the buffer to (or from) which the I/O |
1037 | * request will be performed unless URB_NO_TRANSFER_DMA_MAP is set | |
1038 | * (however, do not leave garbage in transfer_buffer even then). | |
1039 | * This buffer must be suitable for DMA; allocate it with | |
1da177e4 LT |
1040 | * kmalloc() or equivalent. For transfers to "in" endpoints, contents |
1041 | * of this buffer will be modified. This buffer is used for the data | |
1042 | * stage of control transfers. | |
1043 | * @transfer_dma: When transfer_flags includes URB_NO_TRANSFER_DMA_MAP, | |
1044 | * the device driver is saying that it provided this DMA address, | |
1045 | * which the host controller driver should use in preference to the | |
1046 | * transfer_buffer. | |
e376bbbb RD |
1047 | * @sg: scatter gather buffer list |
1048 | * @num_sgs: number of entries in the sg list | |
1da177e4 LT |
1049 | * @transfer_buffer_length: How big is transfer_buffer. The transfer may |
1050 | * be broken up into chunks according to the current maximum packet | |
1051 | * size for the endpoint, which is a function of the configuration | |
1052 | * and is encoded in the pipe. When the length is zero, neither | |
1053 | * transfer_buffer nor transfer_dma is used. | |
1054 | * @actual_length: This is read in non-iso completion functions, and | |
1055 | * it tells how many bytes (out of transfer_buffer_length) were | |
1056 | * transferred. It will normally be the same as requested, unless | |
1057 | * either an error was reported or a short read was performed. | |
1058 | * The URB_SHORT_NOT_OK transfer flag may be used to make such | |
969ab2ee | 1059 | * short reads be reported as errors. |
1da177e4 LT |
1060 | * @setup_packet: Only used for control transfers, this points to eight bytes |
1061 | * of setup data. Control transfers always start by sending this data | |
1062 | * to the device. Then transfer_buffer is read or written, if needed. | |
1063 | * @setup_dma: For control transfers with URB_NO_SETUP_DMA_MAP set, the | |
1064 | * device driver has provided this DMA address for the setup packet. | |
1065 | * The host controller driver should use this in preference to | |
6d65b78a SS |
1066 | * setup_packet, but the HCD may chose to ignore the address if it must |
1067 | * copy the setup packet into internal structures. Therefore, setup_packet | |
1068 | * must always point to a valid buffer. | |
1da177e4 LT |
1069 | * @start_frame: Returns the initial frame for isochronous transfers. |
1070 | * @number_of_packets: Lists the number of ISO transfer buffers. | |
1071 | * @interval: Specifies the polling interval for interrupt or isochronous | |
411c9403 | 1072 | * transfers. The units are frames (milliseconds) for full and low |
1da177e4 LT |
1073 | * speed devices, and microframes (1/8 millisecond) for highspeed ones. |
1074 | * @error_count: Returns the number of ISO transfers that reported errors. | |
1075 | * @context: For use in completion functions. This normally points to | |
1076 | * request-specific driver context. | |
1077 | * @complete: Completion handler. This URB is passed as the parameter to the | |
1078 | * completion function. The completion function may then do what | |
1079 | * it likes with the URB, including resubmitting or freeing it. | |
969ab2ee | 1080 | * @iso_frame_desc: Used to provide arrays of ISO transfer buffers and to |
1da177e4 LT |
1081 | * collect the transfer status for each buffer. |
1082 | * | |
1083 | * This structure identifies USB transfer requests. URBs must be allocated by | |
1084 | * calling usb_alloc_urb() and freed with a call to usb_free_urb(). | |
1085 | * Initialization may be done using various usb_fill_*_urb() functions. URBs | |
1086 | * are submitted using usb_submit_urb(), and pending requests may be canceled | |
1087 | * using usb_unlink_urb() or usb_kill_urb(). | |
1088 | * | |
1089 | * Data Transfer Buffers: | |
1090 | * | |
1091 | * Normally drivers provide I/O buffers allocated with kmalloc() or otherwise | |
1092 | * taken from the general page pool. That is provided by transfer_buffer | |
1093 | * (control requests also use setup_packet), and host controller drivers | |
1094 | * perform a dma mapping (and unmapping) for each buffer transferred. Those | |
1095 | * mapping operations can be expensive on some platforms (perhaps using a dma | |
1096 | * bounce buffer or talking to an IOMMU), | |
1097 | * although they're cheap on commodity x86 and ppc hardware. | |
1098 | * | |
1099 | * Alternatively, drivers may pass the URB_NO_xxx_DMA_MAP transfer flags, | |
1100 | * which tell the host controller driver that no such mapping is needed since | |
1101 | * the device driver is DMA-aware. For example, a device driver might | |
1102 | * allocate a DMA buffer with usb_buffer_alloc() or call usb_buffer_map(). | |
1103 | * When these transfer flags are provided, host controller drivers will | |
1104 | * attempt to use the dma addresses found in the transfer_dma and/or | |
4e9e9200 PZ |
1105 | * setup_dma fields rather than determining a dma address themselves. |
1106 | * | |
1107 | * Note that transfer_buffer must still be set if the controller | |
1108 | * does not support DMA (as indicated by bus.uses_dma) and when talking | |
1109 | * to root hub. If you have to trasfer between highmem zone and the device | |
1110 | * on such controller, create a bounce buffer or bail out with an error. | |
1111 | * If transfer_buffer cannot be set (is in highmem) and the controller is DMA | |
1112 | * capable, assign NULL to it, so that usbmon knows not to use the value. | |
1113 | * The setup_packet must always be set, so it cannot be located in highmem. | |
1da177e4 LT |
1114 | * |
1115 | * Initialization: | |
1116 | * | |
1117 | * All URBs submitted must initialize the dev, pipe, transfer_flags (may be | |
b375a049 | 1118 | * zero), and complete fields. All URBs must also initialize |
1da177e4 LT |
1119 | * transfer_buffer and transfer_buffer_length. They may provide the |
1120 | * URB_SHORT_NOT_OK transfer flag, indicating that short reads are | |
1121 | * to be treated as errors; that flag is invalid for write requests. | |
1122 | * | |
1123 | * Bulk URBs may | |
1124 | * use the URB_ZERO_PACKET transfer flag, indicating that bulk OUT transfers | |
1125 | * should always terminate with a short packet, even if it means adding an | |
1126 | * extra zero length packet. | |
1127 | * | |
1128 | * Control URBs must provide a setup_packet. The setup_packet and | |
1129 | * transfer_buffer may each be mapped for DMA or not, independently of | |
1130 | * the other. The transfer_flags bits URB_NO_TRANSFER_DMA_MAP and | |
1131 | * URB_NO_SETUP_DMA_MAP indicate which buffers have already been mapped. | |
1132 | * URB_NO_SETUP_DMA_MAP is ignored for non-control URBs. | |
1133 | * | |
1134 | * Interrupt URBs must provide an interval, saying how often (in milliseconds | |
1135 | * or, for highspeed devices, 125 microsecond units) | |
1136 | * to poll for transfers. After the URB has been submitted, the interval | |
1137 | * field reflects how the transfer was actually scheduled. | |
1138 | * The polling interval may be more frequent than requested. | |
1139 | * For example, some controllers have a maximum interval of 32 milliseconds, | |
1140 | * while others support intervals of up to 1024 milliseconds. | |
1141 | * Isochronous URBs also have transfer intervals. (Note that for isochronous | |
1142 | * endpoints, as well as high speed interrupt endpoints, the encoding of | |
1143 | * the transfer interval in the endpoint descriptor is logarithmic. | |
1144 | * Device drivers must convert that value to linear units themselves.) | |
1145 | * | |
1146 | * Isochronous URBs normally use the URB_ISO_ASAP transfer flag, telling | |
1147 | * the host controller to schedule the transfer as soon as bandwidth | |
1148 | * utilization allows, and then set start_frame to reflect the actual frame | |
1149 | * selected during submission. Otherwise drivers must specify the start_frame | |
1150 | * and handle the case where the transfer can't begin then. However, drivers | |
1151 | * won't know how bandwidth is currently allocated, and while they can | |
1152 | * find the current frame using usb_get_current_frame_number () they can't | |
1153 | * know the range for that frame number. (Ranges for frame counter values | |
1154 | * are HC-specific, and can go from 256 to 65536 frames from "now".) | |
1155 | * | |
1156 | * Isochronous URBs have a different data transfer model, in part because | |
1157 | * the quality of service is only "best effort". Callers provide specially | |
1158 | * allocated URBs, with number_of_packets worth of iso_frame_desc structures | |
1159 | * at the end. Each such packet is an individual ISO transfer. Isochronous | |
1160 | * URBs are normally queued, submitted by drivers to arrange that | |
1161 | * transfers are at least double buffered, and then explicitly resubmitted | |
1162 | * in completion handlers, so | |
1163 | * that data (such as audio or video) streams at as constant a rate as the | |
1164 | * host controller scheduler can support. | |
1165 | * | |
1166 | * Completion Callbacks: | |
1167 | * | |
1168 | * The completion callback is made in_interrupt(), and one of the first | |
1169 | * things that a completion handler should do is check the status field. | |
1170 | * The status field is provided for all URBs. It is used to report | |
1171 | * unlinked URBs, and status for all non-ISO transfers. It should not | |
1172 | * be examined before the URB is returned to the completion handler. | |
1173 | * | |
1174 | * The context field is normally used to link URBs back to the relevant | |
1175 | * driver or request state. | |
1176 | * | |
1177 | * When the completion callback is invoked for non-isochronous URBs, the | |
1178 | * actual_length field tells how many bytes were transferred. This field | |
1179 | * is updated even when the URB terminated with an error or was unlinked. | |
1180 | * | |
1181 | * ISO transfer status is reported in the status and actual_length fields | |
1182 | * of the iso_frame_desc array, and the number of errors is reported in | |
1183 | * error_count. Completion callbacks for ISO transfers will normally | |
1184 | * (re)submit URBs to ensure a constant transfer rate. | |
719df469 RK |
1185 | * |
1186 | * Note that even fields marked "public" should not be touched by the driver | |
1187 | * when the urb is owned by the hcd, that is, since the call to | |
1188 | * usb_submit_urb() till the entry into the completion routine. | |
1da177e4 | 1189 | */ |
969ab2ee | 1190 | struct urb { |
aeec46b9 | 1191 | /* private: usb core and host controller only fields in the urb */ |
1da177e4 | 1192 | struct kref kref; /* reference count of the URB */ |
1da177e4 | 1193 | void *hcpriv; /* private data for host controller */ |
1da177e4 | 1194 | atomic_t use_count; /* concurrent submissions counter */ |
49367d8f | 1195 | atomic_t reject; /* submissions will fail */ |
eb231054 | 1196 | int unlinked; /* unlink error code */ |
1da177e4 | 1197 | |
aeec46b9 | 1198 | /* public: documented fields in the urb that can be used by drivers */ |
b724ae77 AS |
1199 | struct list_head urb_list; /* list head for use by the urb's |
1200 | * current owner */ | |
969ab2ee | 1201 | struct list_head anchor_list; /* the URB may be anchored */ |
51a2f077 | 1202 | struct usb_anchor *anchor; |
1da177e4 | 1203 | struct usb_device *dev; /* (in) pointer to associated device */ |
969ab2ee | 1204 | struct usb_host_endpoint *ep; /* (internal) pointer to endpoint */ |
1da177e4 LT |
1205 | unsigned int pipe; /* (in) pipe information */ |
1206 | int status; /* (return) non-ISO status */ | |
1207 | unsigned int transfer_flags; /* (in) URB_SHORT_NOT_OK | ...*/ | |
1208 | void *transfer_buffer; /* (in) associated data buffer */ | |
1209 | dma_addr_t transfer_dma; /* (in) dma addr for transfer_buffer */ | |
e04748e3 SS |
1210 | struct usb_sg_request *sg; /* (in) scatter gather buffer list */ |
1211 | int num_sgs; /* (in) number of entries in the sg list */ | |
16e2e5f6 | 1212 | u32 transfer_buffer_length; /* (in) data buffer length */ |
8c209e67 | 1213 | u32 actual_length; /* (return) actual transfer length */ |
1da177e4 LT |
1214 | unsigned char *setup_packet; /* (in) setup packet (control only) */ |
1215 | dma_addr_t setup_dma; /* (in) dma addr for setup_packet */ | |
1216 | int start_frame; /* (modify) start frame (ISO) */ | |
1217 | int number_of_packets; /* (in) number of ISO packets */ | |
b724ae77 AS |
1218 | int interval; /* (modify) transfer interval |
1219 | * (INT/ISO) */ | |
1da177e4 LT |
1220 | int error_count; /* (return) number of ISO errors */ |
1221 | void *context; /* (in) context for completion */ | |
1222 | usb_complete_t complete; /* (in) completion routine */ | |
b724ae77 AS |
1223 | struct usb_iso_packet_descriptor iso_frame_desc[0]; |
1224 | /* (in) ISO ONLY */ | |
1da177e4 LT |
1225 | }; |
1226 | ||
b724ae77 | 1227 | /* ----------------------------------------------------------------------- */ |
1da177e4 LT |
1228 | |
1229 | /** | |
1230 | * usb_fill_control_urb - initializes a control urb | |
1231 | * @urb: pointer to the urb to initialize. | |
1232 | * @dev: pointer to the struct usb_device for this urb. | |
1233 | * @pipe: the endpoint pipe | |
1234 | * @setup_packet: pointer to the setup_packet buffer | |
1235 | * @transfer_buffer: pointer to the transfer buffer | |
1236 | * @buffer_length: length of the transfer buffer | |
3d5b2510 | 1237 | * @complete_fn: pointer to the usb_complete_t function |
1da177e4 LT |
1238 | * @context: what to set the urb context to. |
1239 | * | |
1240 | * Initializes a control urb with the proper information needed to submit | |
1241 | * it to a device. | |
1242 | */ | |
969ab2ee GKH |
1243 | static inline void usb_fill_control_urb(struct urb *urb, |
1244 | struct usb_device *dev, | |
1245 | unsigned int pipe, | |
1246 | unsigned char *setup_packet, | |
1247 | void *transfer_buffer, | |
1248 | int buffer_length, | |
1249 | usb_complete_t complete_fn, | |
1250 | void *context) | |
1da177e4 | 1251 | { |
1da177e4 LT |
1252 | urb->dev = dev; |
1253 | urb->pipe = pipe; | |
1254 | urb->setup_packet = setup_packet; | |
1255 | urb->transfer_buffer = transfer_buffer; | |
1256 | urb->transfer_buffer_length = buffer_length; | |
3d5b2510 | 1257 | urb->complete = complete_fn; |
1da177e4 LT |
1258 | urb->context = context; |
1259 | } | |
1260 | ||
1261 | /** | |
1262 | * usb_fill_bulk_urb - macro to help initialize a bulk urb | |
1263 | * @urb: pointer to the urb to initialize. | |
1264 | * @dev: pointer to the struct usb_device for this urb. | |
1265 | * @pipe: the endpoint pipe | |
1266 | * @transfer_buffer: pointer to the transfer buffer | |
1267 | * @buffer_length: length of the transfer buffer | |
3d5b2510 | 1268 | * @complete_fn: pointer to the usb_complete_t function |
1da177e4 LT |
1269 | * @context: what to set the urb context to. |
1270 | * | |
1271 | * Initializes a bulk urb with the proper information needed to submit it | |
1272 | * to a device. | |
1273 | */ | |
969ab2ee GKH |
1274 | static inline void usb_fill_bulk_urb(struct urb *urb, |
1275 | struct usb_device *dev, | |
1276 | unsigned int pipe, | |
1277 | void *transfer_buffer, | |
1278 | int buffer_length, | |
1279 | usb_complete_t complete_fn, | |
1280 | void *context) | |
1da177e4 | 1281 | { |
1da177e4 LT |
1282 | urb->dev = dev; |
1283 | urb->pipe = pipe; | |
1284 | urb->transfer_buffer = transfer_buffer; | |
1285 | urb->transfer_buffer_length = buffer_length; | |
3d5b2510 | 1286 | urb->complete = complete_fn; |
1da177e4 LT |
1287 | urb->context = context; |
1288 | } | |
1289 | ||
1290 | /** | |
1291 | * usb_fill_int_urb - macro to help initialize a interrupt urb | |
1292 | * @urb: pointer to the urb to initialize. | |
1293 | * @dev: pointer to the struct usb_device for this urb. | |
1294 | * @pipe: the endpoint pipe | |
1295 | * @transfer_buffer: pointer to the transfer buffer | |
1296 | * @buffer_length: length of the transfer buffer | |
3d5b2510 | 1297 | * @complete_fn: pointer to the usb_complete_t function |
1da177e4 LT |
1298 | * @context: what to set the urb context to. |
1299 | * @interval: what to set the urb interval to, encoded like | |
1300 | * the endpoint descriptor's bInterval value. | |
1301 | * | |
1302 | * Initializes a interrupt urb with the proper information needed to submit | |
1303 | * it to a device. | |
1304 | * Note that high speed interrupt endpoints use a logarithmic encoding of | |
1305 | * the endpoint interval, and express polling intervals in microframes | |
1306 | * (eight per millisecond) rather than in frames (one per millisecond). | |
1307 | */ | |
969ab2ee GKH |
1308 | static inline void usb_fill_int_urb(struct urb *urb, |
1309 | struct usb_device *dev, | |
1310 | unsigned int pipe, | |
1311 | void *transfer_buffer, | |
1312 | int buffer_length, | |
1313 | usb_complete_t complete_fn, | |
1314 | void *context, | |
1315 | int interval) | |
1da177e4 | 1316 | { |
1da177e4 LT |
1317 | urb->dev = dev; |
1318 | urb->pipe = pipe; | |
1319 | urb->transfer_buffer = transfer_buffer; | |
1320 | urb->transfer_buffer_length = buffer_length; | |
3d5b2510 | 1321 | urb->complete = complete_fn; |
1da177e4 LT |
1322 | urb->context = context; |
1323 | if (dev->speed == USB_SPEED_HIGH) | |
1324 | urb->interval = 1 << (interval - 1); | |
1325 | else | |
1326 | urb->interval = interval; | |
1327 | urb->start_frame = -1; | |
1328 | } | |
1329 | ||
1330 | extern void usb_init_urb(struct urb *urb); | |
55016f10 | 1331 | extern struct urb *usb_alloc_urb(int iso_packets, gfp_t mem_flags); |
1da177e4 LT |
1332 | extern void usb_free_urb(struct urb *urb); |
1333 | #define usb_put_urb usb_free_urb | |
1334 | extern struct urb *usb_get_urb(struct urb *urb); | |
55016f10 | 1335 | extern int usb_submit_urb(struct urb *urb, gfp_t mem_flags); |
1da177e4 LT |
1336 | extern int usb_unlink_urb(struct urb *urb); |
1337 | extern void usb_kill_urb(struct urb *urb); | |
55b447bf ON |
1338 | extern void usb_poison_urb(struct urb *urb); |
1339 | extern void usb_unpoison_urb(struct urb *urb); | |
51a2f077 | 1340 | extern void usb_kill_anchored_urbs(struct usb_anchor *anchor); |
6a2839be | 1341 | extern void usb_poison_anchored_urbs(struct usb_anchor *anchor); |
856395d6 | 1342 | extern void usb_unpoison_anchored_urbs(struct usb_anchor *anchor); |
eda76959 | 1343 | extern void usb_unlink_anchored_urbs(struct usb_anchor *anchor); |
51a2f077 ON |
1344 | extern void usb_anchor_urb(struct urb *urb, struct usb_anchor *anchor); |
1345 | extern void usb_unanchor_urb(struct urb *urb); | |
1346 | extern int usb_wait_anchor_empty_timeout(struct usb_anchor *anchor, | |
1347 | unsigned int timeout); | |
19876252 ON |
1348 | extern struct urb *usb_get_from_anchor(struct usb_anchor *anchor); |
1349 | extern void usb_scuttle_anchored_urbs(struct usb_anchor *anchor); | |
1350 | extern int usb_anchor_empty(struct usb_anchor *anchor); | |
1da177e4 | 1351 | |
fea34091 AS |
1352 | /** |
1353 | * usb_urb_dir_in - check if an URB describes an IN transfer | |
1354 | * @urb: URB to be checked | |
1355 | * | |
1356 | * Returns 1 if @urb describes an IN transfer (device-to-host), | |
1357 | * otherwise 0. | |
1358 | */ | |
1359 | static inline int usb_urb_dir_in(struct urb *urb) | |
1360 | { | |
d617bc83 | 1361 | return (urb->transfer_flags & URB_DIR_MASK) == URB_DIR_IN; |
fea34091 AS |
1362 | } |
1363 | ||
1364 | /** | |
1365 | * usb_urb_dir_out - check if an URB describes an OUT transfer | |
1366 | * @urb: URB to be checked | |
1367 | * | |
1368 | * Returns 1 if @urb describes an OUT transfer (host-to-device), | |
1369 | * otherwise 0. | |
1370 | */ | |
1371 | static inline int usb_urb_dir_out(struct urb *urb) | |
1372 | { | |
1373 | return (urb->transfer_flags & URB_DIR_MASK) == URB_DIR_OUT; | |
1374 | } | |
1375 | ||
969ab2ee | 1376 | void *usb_buffer_alloc(struct usb_device *dev, size_t size, |
55016f10 | 1377 | gfp_t mem_flags, dma_addr_t *dma); |
969ab2ee | 1378 | void usb_buffer_free(struct usb_device *dev, size_t size, |
1da177e4 LT |
1379 | void *addr, dma_addr_t dma); |
1380 | ||
1381 | #if 0 | |
969ab2ee GKH |
1382 | struct urb *usb_buffer_map(struct urb *urb); |
1383 | void usb_buffer_dmasync(struct urb *urb); | |
1384 | void usb_buffer_unmap(struct urb *urb); | |
1da177e4 LT |
1385 | #endif |
1386 | ||
1387 | struct scatterlist; | |
5e60a161 | 1388 | int usb_buffer_map_sg(const struct usb_device *dev, int is_in, |
095bc335 | 1389 | struct scatterlist *sg, int nents); |
1da177e4 | 1390 | #if 0 |
5e60a161 | 1391 | void usb_buffer_dmasync_sg(const struct usb_device *dev, int is_in, |
095bc335 | 1392 | struct scatterlist *sg, int n_hw_ents); |
1da177e4 | 1393 | #endif |
5e60a161 | 1394 | void usb_buffer_unmap_sg(const struct usb_device *dev, int is_in, |
095bc335 | 1395 | struct scatterlist *sg, int n_hw_ents); |
1da177e4 LT |
1396 | |
1397 | /*-------------------------------------------------------------------* | |
1398 | * SYNCHRONOUS CALL SUPPORT * | |
1399 | *-------------------------------------------------------------------*/ | |
1400 | ||
1401 | extern int usb_control_msg(struct usb_device *dev, unsigned int pipe, | |
1402 | __u8 request, __u8 requesttype, __u16 value, __u16 index, | |
1403 | void *data, __u16 size, int timeout); | |
782a7a63 GKH |
1404 | extern int usb_interrupt_msg(struct usb_device *usb_dev, unsigned int pipe, |
1405 | void *data, int len, int *actual_length, int timeout); | |
1da177e4 LT |
1406 | extern int usb_bulk_msg(struct usb_device *usb_dev, unsigned int pipe, |
1407 | void *data, int len, int *actual_length, | |
1408 | int timeout); | |
1409 | ||
1da177e4 LT |
1410 | /* wrappers around usb_control_msg() for the most common standard requests */ |
1411 | extern int usb_get_descriptor(struct usb_device *dev, unsigned char desctype, | |
1412 | unsigned char descindex, void *buf, int size); | |
1413 | extern int usb_get_status(struct usb_device *dev, | |
1414 | int type, int target, void *data); | |
1da177e4 LT |
1415 | extern int usb_string(struct usb_device *dev, int index, |
1416 | char *buf, size_t size); | |
1417 | ||
1418 | /* wrappers that also update important state inside usbcore */ | |
1419 | extern int usb_clear_halt(struct usb_device *dev, int pipe); | |
1420 | extern int usb_reset_configuration(struct usb_device *dev); | |
1421 | extern int usb_set_interface(struct usb_device *dev, int ifnum, int alternate); | |
3444b26a | 1422 | extern void usb_reset_endpoint(struct usb_device *dev, unsigned int epaddr); |
1da177e4 | 1423 | |
088dc270 AS |
1424 | /* this request isn't really synchronous, but it belongs with the others */ |
1425 | extern int usb_driver_set_configuration(struct usb_device *udev, int config); | |
1426 | ||
1da177e4 LT |
1427 | /* |
1428 | * timeouts, in milliseconds, used for sending/receiving control messages | |
1429 | * they typically complete within a few frames (msec) after they're issued | |
1430 | * USB identifies 5 second timeouts, maybe more in a few cases, and a few | |
1431 | * slow devices (like some MGE Ellipse UPSes) actually push that limit. | |
1432 | */ | |
1433 | #define USB_CTRL_GET_TIMEOUT 5000 | |
1434 | #define USB_CTRL_SET_TIMEOUT 5000 | |
1435 | ||
1436 | ||
1437 | /** | |
1438 | * struct usb_sg_request - support for scatter/gather I/O | |
1439 | * @status: zero indicates success, else negative errno | |
1440 | * @bytes: counts bytes transferred. | |
1441 | * | |
1442 | * These requests are initialized using usb_sg_init(), and then are used | |
1443 | * as request handles passed to usb_sg_wait() or usb_sg_cancel(). Most | |
1444 | * members of the request object aren't for driver access. | |
1445 | * | |
1446 | * The status and bytecount values are valid only after usb_sg_wait() | |
1447 | * returns. If the status is zero, then the bytecount matches the total | |
1448 | * from the request. | |
1449 | * | |
1450 | * After an error completion, drivers may need to clear a halt condition | |
1451 | * on the endpoint. | |
1452 | */ | |
1453 | struct usb_sg_request { | |
1454 | int status; | |
1455 | size_t bytes; | |
1456 | ||
bf92c190 RD |
1457 | /* private: |
1458 | * members below are private to usbcore, | |
1da177e4 LT |
1459 | * and are not provided for driver access! |
1460 | */ | |
1461 | spinlock_t lock; | |
1462 | ||
1463 | struct usb_device *dev; | |
1464 | int pipe; | |
1465 | struct scatterlist *sg; | |
1466 | int nents; | |
1467 | ||
1468 | int entries; | |
1469 | struct urb **urbs; | |
1470 | ||
1471 | int count; | |
1472 | struct completion complete; | |
1473 | }; | |
1474 | ||
969ab2ee | 1475 | int usb_sg_init( |
1da177e4 LT |
1476 | struct usb_sg_request *io, |
1477 | struct usb_device *dev, | |
969ab2ee | 1478 | unsigned pipe, |
1da177e4 LT |
1479 | unsigned period, |
1480 | struct scatterlist *sg, | |
1481 | int nents, | |
1482 | size_t length, | |
55016f10 | 1483 | gfp_t mem_flags |
1da177e4 | 1484 | ); |
969ab2ee GKH |
1485 | void usb_sg_cancel(struct usb_sg_request *io); |
1486 | void usb_sg_wait(struct usb_sg_request *io); | |
1da177e4 LT |
1487 | |
1488 | ||
b724ae77 | 1489 | /* ----------------------------------------------------------------------- */ |
1da177e4 LT |
1490 | |
1491 | /* | |
1492 | * For various legacy reasons, Linux has a small cookie that's paired with | |
1493 | * a struct usb_device to identify an endpoint queue. Queue characteristics | |
1494 | * are defined by the endpoint's descriptor. This cookie is called a "pipe", | |
1495 | * an unsigned int encoded as: | |
1496 | * | |
1497 | * - direction: bit 7 (0 = Host-to-Device [Out], | |
1498 | * 1 = Device-to-Host [In] ... | |
1499 | * like endpoint bEndpointAddress) | |
1500 | * - device address: bits 8-14 ... bit positions known to uhci-hcd | |
1501 | * - endpoint: bits 15-18 ... bit positions known to uhci-hcd | |
1502 | * - pipe type: bits 30-31 (00 = isochronous, 01 = interrupt, | |
1503 | * 10 = control, 11 = bulk) | |
1504 | * | |
1505 | * Given the device address and endpoint descriptor, pipes are redundant. | |
1506 | */ | |
1507 | ||
1508 | /* NOTE: these are not the standard USB_ENDPOINT_XFER_* values!! */ | |
1509 | /* (yet ... they're the values used by usbfs) */ | |
1510 | #define PIPE_ISOCHRONOUS 0 | |
1511 | #define PIPE_INTERRUPT 1 | |
1512 | #define PIPE_CONTROL 2 | |
1513 | #define PIPE_BULK 3 | |
1514 | ||
1515 | #define usb_pipein(pipe) ((pipe) & USB_DIR_IN) | |
1516 | #define usb_pipeout(pipe) (!usb_pipein(pipe)) | |
1517 | ||
1518 | #define usb_pipedevice(pipe) (((pipe) >> 8) & 0x7f) | |
1519 | #define usb_pipeendpoint(pipe) (((pipe) >> 15) & 0xf) | |
1520 | ||
1521 | #define usb_pipetype(pipe) (((pipe) >> 30) & 3) | |
1522 | #define usb_pipeisoc(pipe) (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS) | |
1523 | #define usb_pipeint(pipe) (usb_pipetype((pipe)) == PIPE_INTERRUPT) | |
1524 | #define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL) | |
1525 | #define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK) | |
1526 | ||
b724ae77 AS |
1527 | static inline unsigned int __create_pipe(struct usb_device *dev, |
1528 | unsigned int endpoint) | |
1da177e4 LT |
1529 | { |
1530 | return (dev->devnum << 8) | (endpoint << 15); | |
1531 | } | |
1532 | ||
1533 | /* Create various pipes... */ | |
b724ae77 | 1534 | #define usb_sndctrlpipe(dev,endpoint) \ |
969ab2ee | 1535 | ((PIPE_CONTROL << 30) | __create_pipe(dev, endpoint)) |
b724ae77 | 1536 | #define usb_rcvctrlpipe(dev,endpoint) \ |
969ab2ee | 1537 | ((PIPE_CONTROL << 30) | __create_pipe(dev, endpoint) | USB_DIR_IN) |
b724ae77 | 1538 | #define usb_sndisocpipe(dev,endpoint) \ |
969ab2ee | 1539 | ((PIPE_ISOCHRONOUS << 30) | __create_pipe(dev, endpoint)) |
b724ae77 | 1540 | #define usb_rcvisocpipe(dev,endpoint) \ |
969ab2ee | 1541 | ((PIPE_ISOCHRONOUS << 30) | __create_pipe(dev, endpoint) | USB_DIR_IN) |
b724ae77 | 1542 | #define usb_sndbulkpipe(dev,endpoint) \ |
969ab2ee | 1543 | ((PIPE_BULK << 30) | __create_pipe(dev, endpoint)) |
b724ae77 | 1544 | #define usb_rcvbulkpipe(dev,endpoint) \ |
969ab2ee | 1545 | ((PIPE_BULK << 30) | __create_pipe(dev, endpoint) | USB_DIR_IN) |
b724ae77 | 1546 | #define usb_sndintpipe(dev,endpoint) \ |
969ab2ee | 1547 | ((PIPE_INTERRUPT << 30) | __create_pipe(dev, endpoint)) |
b724ae77 | 1548 | #define usb_rcvintpipe(dev,endpoint) \ |
969ab2ee | 1549 | ((PIPE_INTERRUPT << 30) | __create_pipe(dev, endpoint) | USB_DIR_IN) |
1da177e4 LT |
1550 | |
1551 | /*-------------------------------------------------------------------------*/ | |
1552 | ||
1553 | static inline __u16 | |
1554 | usb_maxpacket(struct usb_device *udev, int pipe, int is_out) | |
1555 | { | |
1556 | struct usb_host_endpoint *ep; | |
1557 | unsigned epnum = usb_pipeendpoint(pipe); | |
1558 | ||
1559 | if (is_out) { | |
1560 | WARN_ON(usb_pipein(pipe)); | |
1561 | ep = udev->ep_out[epnum]; | |
1562 | } else { | |
1563 | WARN_ON(usb_pipeout(pipe)); | |
1564 | ep = udev->ep_in[epnum]; | |
1565 | } | |
1566 | if (!ep) | |
1567 | return 0; | |
1568 | ||
1569 | /* NOTE: only 0x07ff bits are for packet size... */ | |
1570 | return le16_to_cpu(ep->desc.wMaxPacketSize); | |
1571 | } | |
1572 | ||
b724ae77 | 1573 | /* ----------------------------------------------------------------------- */ |
1da177e4 | 1574 | |
3099e75a GKH |
1575 | /* Events from the usb core */ |
1576 | #define USB_DEVICE_ADD 0x0001 | |
1577 | #define USB_DEVICE_REMOVE 0x0002 | |
1578 | #define USB_BUS_ADD 0x0003 | |
1579 | #define USB_BUS_REMOVE 0x0004 | |
1580 | extern void usb_register_notify(struct notifier_block *nb); | |
1581 | extern void usb_unregister_notify(struct notifier_block *nb); | |
1582 | ||
1da177e4 | 1583 | #ifdef DEBUG |
b724ae77 AS |
1584 | #define dbg(format, arg...) printk(KERN_DEBUG "%s: " format "\n" , \ |
1585 | __FILE__ , ## arg) | |
1da177e4 LT |
1586 | #else |
1587 | #define dbg(format, arg...) do {} while (0) | |
1588 | #endif | |
1589 | ||
f66396b5 TS |
1590 | #define err(format, arg...) printk(KERN_ERR KBUILD_MODNAME ": " \ |
1591 | format "\n" , ## arg) | |
1da177e4 | 1592 | |
00048b8b GKH |
1593 | /* debugfs stuff */ |
1594 | extern struct dentry *usb_debug_root; | |
1595 | ||
1da177e4 LT |
1596 | #endif /* __KERNEL__ */ |
1597 | ||
1598 | #endif |