hcd.h 23 KB

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  1. /*
  2. * Copyright (c) 2001-2002 by David Brownell
  3. *
  4. * This program is free software; you can redistribute it and/or modify it
  5. * under the terms of the GNU General Public License as published by the
  6. * Free Software Foundation; either version 2 of the License, or (at your
  7. * option) any later version.
  8. *
  9. * This program is distributed in the hope that it will be useful, but
  10. * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11. * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  12. * for more details.
  13. *
  14. * You should have received a copy of the GNU General Public License
  15. * along with this program; if not, write to the Free Software Foundation,
  16. * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17. */
  18. #ifndef __USB_CORE_HCD_H
  19. #define __USB_CORE_HCD_H
  20. #ifdef __KERNEL__
  21. #include <linux/rwsem.h>
  22. #define MAX_TOPO_LEVEL 6
  23. /* This file contains declarations of usbcore internals that are mostly
  24. * used or exposed by Host Controller Drivers.
  25. */
  26. /*
  27. * USB Packet IDs (PIDs)
  28. */
  29. #define USB_PID_EXT 0xf0 /* USB 2.0 LPM ECN */
  30. #define USB_PID_OUT 0xe1
  31. #define USB_PID_ACK 0xd2
  32. #define USB_PID_DATA0 0xc3
  33. #define USB_PID_PING 0xb4 /* USB 2.0 */
  34. #define USB_PID_SOF 0xa5
  35. #define USB_PID_NYET 0x96 /* USB 2.0 */
  36. #define USB_PID_DATA2 0x87 /* USB 2.0 */
  37. #define USB_PID_SPLIT 0x78 /* USB 2.0 */
  38. #define USB_PID_IN 0x69
  39. #define USB_PID_NAK 0x5a
  40. #define USB_PID_DATA1 0x4b
  41. #define USB_PID_PREAMBLE 0x3c /* Token mode */
  42. #define USB_PID_ERR 0x3c /* USB 2.0: handshake mode */
  43. #define USB_PID_SETUP 0x2d
  44. #define USB_PID_STALL 0x1e
  45. #define USB_PID_MDATA 0x0f /* USB 2.0 */
  46. /*-------------------------------------------------------------------------*/
  47. /*
  48. * USB Host Controller Driver (usb_hcd) framework
  49. *
  50. * Since "struct usb_bus" is so thin, you can't share much code in it.
  51. * This framework is a layer over that, and should be more sharable.
  52. *
  53. * @authorized_default: Specifies if new devices are authorized to
  54. * connect by default or they require explicit
  55. * user space authorization; this bit is settable
  56. * through /sys/class/usb_host/X/authorized_default.
  57. * For the rest is RO, so we don't lock to r/w it.
  58. */
  59. /*-------------------------------------------------------------------------*/
  60. struct usb_hcd {
  61. /*
  62. * housekeeping
  63. */
  64. struct usb_bus self; /* hcd is-a bus */
  65. struct kref kref; /* reference counter */
  66. const char *product_desc; /* product/vendor string */
  67. int speed; /* Speed for this roothub.
  68. * May be different from
  69. * hcd->driver->flags & HCD_MASK
  70. */
  71. char irq_descr[24]; /* driver + bus # */
  72. struct timer_list rh_timer; /* drives root-hub polling */
  73. struct urb *status_urb; /* the current status urb */
  74. #ifdef CONFIG_USB_SUSPEND
  75. struct work_struct wakeup_work; /* for remote wakeup */
  76. #endif
  77. /*
  78. * hardware info/state
  79. */
  80. const struct hc_driver *driver; /* hw-specific hooks */
  81. /* Flags that need to be manipulated atomically because they can
  82. * change while the host controller is running. Always use
  83. * set_bit() or clear_bit() to change their values.
  84. */
  85. unsigned long flags;
  86. #define HCD_FLAG_HW_ACCESSIBLE 0 /* at full power */
  87. #define HCD_FLAG_POLL_RH 2 /* poll for rh status? */
  88. #define HCD_FLAG_POLL_PENDING 3 /* status has changed? */
  89. #define HCD_FLAG_WAKEUP_PENDING 4 /* root hub is resuming? */
  90. #define HCD_FLAG_RH_RUNNING 5 /* root hub is running? */
  91. #define HCD_FLAG_DEAD 6 /* controller has died? */
  92. /* The flags can be tested using these macros; they are likely to
  93. * be slightly faster than test_bit().
  94. */
  95. #define HCD_HW_ACCESSIBLE(hcd) ((hcd)->flags & (1U << HCD_FLAG_HW_ACCESSIBLE))
  96. #define HCD_POLL_RH(hcd) ((hcd)->flags & (1U << HCD_FLAG_POLL_RH))
  97. #define HCD_POLL_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_POLL_PENDING))
  98. #define HCD_WAKEUP_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_WAKEUP_PENDING))
  99. #define HCD_RH_RUNNING(hcd) ((hcd)->flags & (1U << HCD_FLAG_RH_RUNNING))
  100. #define HCD_DEAD(hcd) ((hcd)->flags & (1U << HCD_FLAG_DEAD))
  101. /* Flags that get set only during HCD registration or removal. */
  102. unsigned rh_registered:1;/* is root hub registered? */
  103. unsigned rh_pollable:1; /* may we poll the root hub? */
  104. unsigned msix_enabled:1; /* driver has MSI-X enabled? */
  105. /* The next flag is a stopgap, to be removed when all the HCDs
  106. * support the new root-hub polling mechanism. */
  107. unsigned uses_new_polling:1;
  108. unsigned wireless:1; /* Wireless USB HCD */
  109. unsigned authorized_default:1;
  110. unsigned has_tt:1; /* Integrated TT in root hub */
  111. unsigned broken_pci_sleep:1; /* Don't put the
  112. controller in PCI-D3 for system sleep */
  113. unsigned int irq; /* irq allocated */
  114. void __iomem *regs; /* device memory/io */
  115. u64 rsrc_start; /* memory/io resource start */
  116. u64 rsrc_len; /* memory/io resource length */
  117. unsigned power_budget; /* in mA, 0 = no limit */
  118. /* bandwidth_mutex should be taken before adding or removing
  119. * any new bus bandwidth constraints:
  120. * 1. Before adding a configuration for a new device.
  121. * 2. Before removing the configuration to put the device into
  122. * the addressed state.
  123. * 3. Before selecting a different configuration.
  124. * 4. Before selecting an alternate interface setting.
  125. *
  126. * bandwidth_mutex should be dropped after a successful control message
  127. * to the device, or resetting the bandwidth after a failed attempt.
  128. */
  129. struct mutex *bandwidth_mutex;
  130. struct usb_hcd *shared_hcd;
  131. struct usb_hcd *primary_hcd;
  132. #define HCD_BUFFER_POOLS 4
  133. struct dma_pool *pool[HCD_BUFFER_POOLS];
  134. int state;
  135. # define __ACTIVE 0x01
  136. # define __SUSPEND 0x04
  137. # define __TRANSIENT 0x80
  138. # define HC_STATE_HALT 0
  139. # define HC_STATE_RUNNING (__ACTIVE)
  140. # define HC_STATE_QUIESCING (__SUSPEND|__TRANSIENT|__ACTIVE)
  141. # define HC_STATE_RESUMING (__SUSPEND|__TRANSIENT)
  142. # define HC_STATE_SUSPENDED (__SUSPEND)
  143. #define HC_IS_RUNNING(state) ((state) & __ACTIVE)
  144. #define HC_IS_SUSPENDED(state) ((state) & __SUSPEND)
  145. /* more shared queuing code would be good; it should support
  146. * smarter scheduling, handle transaction translators, etc;
  147. * input size of periodic table to an interrupt scheduler.
  148. * (ohci 32, uhci 1024, ehci 256/512/1024).
  149. */
  150. /* The HC driver's private data is stored at the end of
  151. * this structure.
  152. */
  153. unsigned long hcd_priv[0]
  154. __attribute__ ((aligned(sizeof(s64))));
  155. };
  156. /* 2.4 does this a bit differently ... */
  157. static inline struct usb_bus *hcd_to_bus(struct usb_hcd *hcd)
  158. {
  159. return &hcd->self;
  160. }
  161. static inline struct usb_hcd *bus_to_hcd(struct usb_bus *bus)
  162. {
  163. return container_of(bus, struct usb_hcd, self);
  164. }
  165. struct hcd_timeout { /* timeouts we allocate */
  166. struct list_head timeout_list;
  167. struct timer_list timer;
  168. };
  169. /*-------------------------------------------------------------------------*/
  170. struct hc_driver {
  171. const char *description; /* "ehci-hcd" etc */
  172. const char *product_desc; /* product/vendor string */
  173. size_t hcd_priv_size; /* size of private data */
  174. /* irq handler */
  175. irqreturn_t (*irq) (struct usb_hcd *hcd);
  176. int flags;
  177. #define HCD_MEMORY 0x0001 /* HC regs use memory (else I/O) */
  178. #define HCD_LOCAL_MEM 0x0002 /* HC needs local memory */
  179. #define HCD_SHARED 0x0004 /* Two (or more) usb_hcds share HW */
  180. #define HCD_USB11 0x0010 /* USB 1.1 */
  181. #define HCD_USB2 0x0020 /* USB 2.0 */
  182. #define HCD_USB3 0x0040 /* USB 3.0 */
  183. #define HCD_MASK 0x0070
  184. /* called to init HCD and root hub */
  185. int (*reset) (struct usb_hcd *hcd);
  186. int (*start) (struct usb_hcd *hcd);
  187. /* NOTE: these suspend/resume calls relate to the HC as
  188. * a whole, not just the root hub; they're for PCI bus glue.
  189. */
  190. /* called after suspending the hub, before entering D3 etc */
  191. int (*pci_suspend)(struct usb_hcd *hcd, bool do_wakeup);
  192. /* called after entering D0 (etc), before resuming the hub */
  193. int (*pci_resume)(struct usb_hcd *hcd, bool hibernated);
  194. /* cleanly make HCD stop writing memory and doing I/O */
  195. void (*stop) (struct usb_hcd *hcd);
  196. /* shutdown HCD */
  197. void (*shutdown) (struct usb_hcd *hcd);
  198. /* return current frame number */
  199. int (*get_frame_number) (struct usb_hcd *hcd);
  200. /* manage i/o requests, device state */
  201. int (*urb_enqueue)(struct usb_hcd *hcd,
  202. struct urb *urb, gfp_t mem_flags);
  203. int (*urb_dequeue)(struct usb_hcd *hcd,
  204. struct urb *urb, int status);
  205. /*
  206. * (optional) these hooks allow an HCD to override the default DMA
  207. * mapping and unmapping routines. In general, they shouldn't be
  208. * necessary unless the host controller has special DMA requirements,
  209. * such as alignment contraints. If these are not specified, the
  210. * general usb_hcd_(un)?map_urb_for_dma functions will be used instead
  211. * (and it may be a good idea to call these functions in your HCD
  212. * implementation)
  213. */
  214. int (*map_urb_for_dma)(struct usb_hcd *hcd, struct urb *urb,
  215. gfp_t mem_flags);
  216. void (*unmap_urb_for_dma)(struct usb_hcd *hcd, struct urb *urb);
  217. /* hw synch, freeing endpoint resources that urb_dequeue can't */
  218. void (*endpoint_disable)(struct usb_hcd *hcd,
  219. struct usb_host_endpoint *ep);
  220. /* (optional) reset any endpoint state such as sequence number
  221. and current window */
  222. void (*endpoint_reset)(struct usb_hcd *hcd,
  223. struct usb_host_endpoint *ep);
  224. /* root hub support */
  225. int (*hub_status_data) (struct usb_hcd *hcd, char *buf);
  226. int (*hub_control) (struct usb_hcd *hcd,
  227. u16 typeReq, u16 wValue, u16 wIndex,
  228. char *buf, u16 wLength);
  229. int (*bus_suspend)(struct usb_hcd *);
  230. int (*bus_resume)(struct usb_hcd *);
  231. int (*start_port_reset)(struct usb_hcd *, unsigned port_num);
  232. /* force handover of high-speed port to full-speed companion */
  233. void (*relinquish_port)(struct usb_hcd *, int);
  234. /* has a port been handed over to a companion? */
  235. int (*port_handed_over)(struct usb_hcd *, int);
  236. /* CLEAR_TT_BUFFER completion callback */
  237. void (*clear_tt_buffer_complete)(struct usb_hcd *,
  238. struct usb_host_endpoint *);
  239. /* xHCI specific functions */
  240. /* Called by usb_alloc_dev to alloc HC device structures */
  241. int (*alloc_dev)(struct usb_hcd *, struct usb_device *);
  242. /* Called by usb_disconnect to free HC device structures */
  243. void (*free_dev)(struct usb_hcd *, struct usb_device *);
  244. /* Change a group of bulk endpoints to support multiple stream IDs */
  245. int (*alloc_streams)(struct usb_hcd *hcd, struct usb_device *udev,
  246. struct usb_host_endpoint **eps, unsigned int num_eps,
  247. unsigned int num_streams, gfp_t mem_flags);
  248. /* Reverts a group of bulk endpoints back to not using stream IDs.
  249. * Can fail if we run out of memory.
  250. */
  251. int (*free_streams)(struct usb_hcd *hcd, struct usb_device *udev,
  252. struct usb_host_endpoint **eps, unsigned int num_eps,
  253. gfp_t mem_flags);
  254. /* Bandwidth computation functions */
  255. /* Note that add_endpoint() can only be called once per endpoint before
  256. * check_bandwidth() or reset_bandwidth() must be called.
  257. * drop_endpoint() can only be called once per endpoint also.
  258. * A call to xhci_drop_endpoint() followed by a call to
  259. * xhci_add_endpoint() will add the endpoint to the schedule with
  260. * possibly new parameters denoted by a different endpoint descriptor
  261. * in usb_host_endpoint. A call to xhci_add_endpoint() followed by a
  262. * call to xhci_drop_endpoint() is not allowed.
  263. */
  264. /* Allocate endpoint resources and add them to a new schedule */
  265. int (*add_endpoint)(struct usb_hcd *, struct usb_device *,
  266. struct usb_host_endpoint *);
  267. /* Drop an endpoint from a new schedule */
  268. int (*drop_endpoint)(struct usb_hcd *, struct usb_device *,
  269. struct usb_host_endpoint *);
  270. /* Check that a new hardware configuration, set using
  271. * endpoint_enable and endpoint_disable, does not exceed bus
  272. * bandwidth. This must be called before any set configuration
  273. * or set interface requests are sent to the device.
  274. */
  275. int (*check_bandwidth)(struct usb_hcd *, struct usb_device *);
  276. /* Reset the device schedule to the last known good schedule,
  277. * which was set from a previous successful call to
  278. * check_bandwidth(). This reverts any add_endpoint() and
  279. * drop_endpoint() calls since that last successful call.
  280. * Used for when a check_bandwidth() call fails due to resource
  281. * or bandwidth constraints.
  282. */
  283. void (*reset_bandwidth)(struct usb_hcd *, struct usb_device *);
  284. /* Returns the hardware-chosen device address */
  285. int (*address_device)(struct usb_hcd *, struct usb_device *udev);
  286. /* Notifies the HCD after a hub descriptor is fetched.
  287. * Will block.
  288. */
  289. int (*update_hub_device)(struct usb_hcd *, struct usb_device *hdev,
  290. struct usb_tt *tt, gfp_t mem_flags);
  291. int (*reset_device)(struct usb_hcd *, struct usb_device *);
  292. /* Notifies the HCD after a device is connected and its
  293. * address is set
  294. */
  295. int (*update_device)(struct usb_hcd *, struct usb_device *);
  296. int (*set_usb2_hw_lpm)(struct usb_hcd *, struct usb_device *, int);
  297. /* USB 3.0 Link Power Management */
  298. /* Returns the USB3 hub-encoded value for the U1/U2 timeout. */
  299. int (*enable_usb3_lpm_timeout)(struct usb_hcd *,
  300. struct usb_device *, enum usb3_link_state state);
  301. /* The xHCI host controller can still fail the command to
  302. * disable the LPM timeouts, so this can return an error code.
  303. */
  304. int (*disable_usb3_lpm_timeout)(struct usb_hcd *,
  305. struct usb_device *, enum usb3_link_state state);
  306. };
  307. extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb);
  308. extern int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,
  309. int status);
  310. extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb);
  311. extern int usb_hcd_submit_urb(struct urb *urb, gfp_t mem_flags);
  312. extern int usb_hcd_unlink_urb(struct urb *urb, int status);
  313. extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb,
  314. int status);
  315. extern int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
  316. gfp_t mem_flags);
  317. extern void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *, struct urb *);
  318. extern void usb_hcd_unmap_urb_for_dma(struct usb_hcd *, struct urb *);
  319. extern void usb_hcd_flush_endpoint(struct usb_device *udev,
  320. struct usb_host_endpoint *ep);
  321. extern void usb_hcd_disable_endpoint(struct usb_device *udev,
  322. struct usb_host_endpoint *ep);
  323. extern void usb_hcd_reset_endpoint(struct usb_device *udev,
  324. struct usb_host_endpoint *ep);
  325. extern void usb_hcd_synchronize_unlinks(struct usb_device *udev);
  326. extern int usb_hcd_alloc_bandwidth(struct usb_device *udev,
  327. struct usb_host_config *new_config,
  328. struct usb_host_interface *old_alt,
  329. struct usb_host_interface *new_alt);
  330. extern int usb_hcd_get_frame_number(struct usb_device *udev);
  331. extern struct usb_hcd *usb_create_hcd(const struct hc_driver *driver,
  332. struct device *dev, const char *bus_name);
  333. extern struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver,
  334. struct device *dev, const char *bus_name,
  335. struct usb_hcd *shared_hcd);
  336. extern struct usb_hcd *usb_get_hcd(struct usb_hcd *hcd);
  337. extern void usb_put_hcd(struct usb_hcd *hcd);
  338. extern int usb_hcd_is_primary_hcd(struct usb_hcd *hcd);
  339. extern int usb_add_hcd(struct usb_hcd *hcd,
  340. unsigned int irqnum, unsigned long irqflags);
  341. extern void usb_remove_hcd(struct usb_hcd *hcd);
  342. struct platform_device;
  343. extern void usb_hcd_platform_shutdown(struct platform_device *dev);
  344. #ifdef CONFIG_PCI
  345. struct pci_dev;
  346. struct pci_device_id;
  347. extern int usb_hcd_pci_probe(struct pci_dev *dev,
  348. const struct pci_device_id *id);
  349. extern void usb_hcd_pci_remove(struct pci_dev *dev);
  350. extern void usb_hcd_pci_shutdown(struct pci_dev *dev);
  351. #ifdef CONFIG_PM_SLEEP
  352. extern const struct dev_pm_ops usb_hcd_pci_pm_ops;
  353. #endif
  354. #endif /* CONFIG_PCI */
  355. /* pci-ish (pdev null is ok) buffer alloc/mapping support */
  356. int hcd_buffer_create(struct usb_hcd *hcd);
  357. void hcd_buffer_destroy(struct usb_hcd *hcd);
  358. void *hcd_buffer_alloc(struct usb_bus *bus, size_t size,
  359. gfp_t mem_flags, dma_addr_t *dma);
  360. void hcd_buffer_free(struct usb_bus *bus, size_t size,
  361. void *addr, dma_addr_t dma);
  362. /* generic bus glue, needed for host controllers that don't use PCI */
  363. extern irqreturn_t usb_hcd_irq(int irq, void *__hcd);
  364. extern void usb_hc_died(struct usb_hcd *hcd);
  365. extern void usb_hcd_poll_rh_status(struct usb_hcd *hcd);
  366. extern void usb_wakeup_notification(struct usb_device *hdev,
  367. unsigned int portnum);
  368. /* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */
  369. #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1)
  370. #define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << (ep)))
  371. #define usb_settoggle(dev, ep, out, bit) \
  372. ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \
  373. ((bit) << (ep)))
  374. /* -------------------------------------------------------------------------- */
  375. /* Enumeration is only for the hub driver, or HCD virtual root hubs */
  376. extern struct usb_device *usb_alloc_dev(struct usb_device *parent,
  377. struct usb_bus *, unsigned port);
  378. extern int usb_new_device(struct usb_device *dev);
  379. extern void usb_disconnect(struct usb_device **);
  380. extern int usb_get_configuration(struct usb_device *dev);
  381. extern void usb_destroy_configuration(struct usb_device *dev);
  382. /*-------------------------------------------------------------------------*/
  383. /*
  384. * HCD Root Hub support
  385. */
  386. #include <linux/usb/ch11.h>
  387. /*
  388. * As of USB 2.0, full/low speed devices are segregated into trees.
  389. * One type grows from USB 1.1 host controllers (OHCI, UHCI etc).
  390. * The other type grows from high speed hubs when they connect to
  391. * full/low speed devices using "Transaction Translators" (TTs).
  392. *
  393. * TTs should only be known to the hub driver, and high speed bus
  394. * drivers (only EHCI for now). They affect periodic scheduling and
  395. * sometimes control/bulk error recovery.
  396. */
  397. struct usb_device;
  398. struct usb_tt {
  399. struct usb_device *hub; /* upstream highspeed hub */
  400. int multi; /* true means one TT per port */
  401. unsigned think_time; /* think time in ns */
  402. /* for control/bulk error recovery (CLEAR_TT_BUFFER) */
  403. spinlock_t lock;
  404. struct list_head clear_list; /* of usb_tt_clear */
  405. struct work_struct clear_work;
  406. };
  407. struct usb_tt_clear {
  408. struct list_head clear_list;
  409. unsigned tt;
  410. u16 devinfo;
  411. struct usb_hcd *hcd;
  412. struct usb_host_endpoint *ep;
  413. };
  414. extern int usb_hub_clear_tt_buffer(struct urb *urb);
  415. extern void usb_ep0_reinit(struct usb_device *);
  416. /* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */
  417. #define DeviceRequest \
  418. ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
  419. #define DeviceOutRequest \
  420. ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
  421. #define InterfaceRequest \
  422. ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
  423. #define EndpointRequest \
  424. ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
  425. #define EndpointOutRequest \
  426. ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
  427. /* class requests from the USB 2.0 hub spec, table 11-15 */
  428. /* GetBusState and SetHubDescriptor are optional, omitted */
  429. #define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE)
  430. #define ClearPortFeature (0x2300 | USB_REQ_CLEAR_FEATURE)
  431. #define GetHubDescriptor (0xa000 | USB_REQ_GET_DESCRIPTOR)
  432. #define GetHubStatus (0xa000 | USB_REQ_GET_STATUS)
  433. #define GetPortStatus (0xa300 | USB_REQ_GET_STATUS)
  434. #define SetHubFeature (0x2000 | USB_REQ_SET_FEATURE)
  435. #define SetPortFeature (0x2300 | USB_REQ_SET_FEATURE)
  436. /*-------------------------------------------------------------------------*/
  437. /* class requests from USB 3.0 hub spec, table 10-5 */
  438. #define SetHubDepth (0x3000 | HUB_SET_DEPTH)
  439. #define GetPortErrorCount (0x8000 | HUB_GET_PORT_ERR_COUNT)
  440. /*
  441. * Generic bandwidth allocation constants/support
  442. */
  443. #define FRAME_TIME_USECS 1000L
  444. #define BitTime(bytecount) (7 * 8 * bytecount / 6) /* with integer truncation */
  445. /* Trying not to use worst-case bit-stuffing
  446. * of (7/6 * 8 * bytecount) = 9.33 * bytecount */
  447. /* bytecount = data payload byte count */
  448. #define NS_TO_US(ns) ((ns + 500L) / 1000L)
  449. /* convert & round nanoseconds to microseconds */
  450. /*
  451. * Full/low speed bandwidth allocation constants/support.
  452. */
  453. #define BW_HOST_DELAY 1000L /* nanoseconds */
  454. #define BW_HUB_LS_SETUP 333L /* nanoseconds */
  455. /* 4 full-speed bit times (est.) */
  456. #define FRAME_TIME_BITS 12000L /* frame = 1 millisecond */
  457. #define FRAME_TIME_MAX_BITS_ALLOC (90L * FRAME_TIME_BITS / 100L)
  458. #define FRAME_TIME_MAX_USECS_ALLOC (90L * FRAME_TIME_USECS / 100L)
  459. /*
  460. * Ceiling [nano/micro]seconds (typical) for that many bytes at high speed
  461. * ISO is a bit less, no ACK ... from USB 2.0 spec, 5.11.3 (and needed
  462. * to preallocate bandwidth)
  463. */
  464. #define USB2_HOST_DELAY 5 /* nsec, guess */
  465. #define HS_NSECS(bytes) (((55 * 8 * 2083) \
  466. + (2083UL * (3 + BitTime(bytes))))/1000 \
  467. + USB2_HOST_DELAY)
  468. #define HS_NSECS_ISO(bytes) (((38 * 8 * 2083) \
  469. + (2083UL * (3 + BitTime(bytes))))/1000 \
  470. + USB2_HOST_DELAY)
  471. #define HS_USECS(bytes) NS_TO_US(HS_NSECS(bytes))
  472. #define HS_USECS_ISO(bytes) NS_TO_US(HS_NSECS_ISO(bytes))
  473. extern long usb_calc_bus_time(int speed, int is_input,
  474. int isoc, int bytecount);
  475. /*-------------------------------------------------------------------------*/
  476. extern void usb_set_device_state(struct usb_device *udev,
  477. enum usb_device_state new_state);
  478. /*-------------------------------------------------------------------------*/
  479. /* exported only within usbcore */
  480. extern struct list_head usb_bus_list;
  481. extern struct mutex usb_bus_list_lock;
  482. extern wait_queue_head_t usb_kill_urb_queue;
  483. extern int usb_find_interface_driver(struct usb_device *dev,
  484. struct usb_interface *interface);
  485. #define usb_endpoint_out(ep_dir) (!((ep_dir) & USB_DIR_IN))
  486. #ifdef CONFIG_PM
  487. extern void usb_root_hub_lost_power(struct usb_device *rhdev);
  488. extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg);
  489. extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg);
  490. #endif /* CONFIG_PM */
  491. #ifdef CONFIG_USB_SUSPEND
  492. extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd);
  493. #else
  494. static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd)
  495. {
  496. return;
  497. }
  498. #endif /* CONFIG_USB_SUSPEND */
  499. /*-------------------------------------------------------------------------*/
  500. #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
  501. struct usb_mon_operations {
  502. void (*urb_submit)(struct usb_bus *bus, struct urb *urb);
  503. void (*urb_submit_error)(struct usb_bus *bus, struct urb *urb, int err);
  504. void (*urb_complete)(struct usb_bus *bus, struct urb *urb, int status);
  505. /* void (*urb_unlink)(struct usb_bus *bus, struct urb *urb); */
  506. };
  507. extern struct usb_mon_operations *mon_ops;
  508. static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb)
  509. {
  510. if (bus->monitored)
  511. (*mon_ops->urb_submit)(bus, urb);
  512. }
  513. static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
  514. int error)
  515. {
  516. if (bus->monitored)
  517. (*mon_ops->urb_submit_error)(bus, urb, error);
  518. }
  519. static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
  520. int status)
  521. {
  522. if (bus->monitored)
  523. (*mon_ops->urb_complete)(bus, urb, status);
  524. }
  525. int usb_mon_register(struct usb_mon_operations *ops);
  526. void usb_mon_deregister(void);
  527. #else
  528. static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb) {}
  529. static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
  530. int error) {}
  531. static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
  532. int status) {}
  533. #endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */
  534. /*-------------------------------------------------------------------------*/
  535. /* random stuff */
  536. #define RUN_CONTEXT (in_irq() ? "in_irq" \
  537. : (in_interrupt() ? "in_interrupt" : "can sleep"))
  538. /* This rwsem is for use only by the hub driver and ehci-hcd.
  539. * Nobody else should touch it.
  540. */
  541. extern struct rw_semaphore ehci_cf_port_reset_rwsem;
  542. /* Keep track of which host controller drivers are loaded */
  543. #define USB_UHCI_LOADED 0
  544. #define USB_OHCI_LOADED 1
  545. #define USB_EHCI_LOADED 2
  546. extern unsigned long usb_hcds_loaded;
  547. #endif /* __KERNEL__ */
  548. #endif /* __USB_CORE_HCD_H */