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// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (c) 2001-2002 by David Brownell * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. / #ifndef __USB_CORE_HCD_H #define __USB_CORE_HCD_H #ifdef __KERNEL__ #include <linux/rwsem.h> #include <linux/interrupt.h> #include <linux/idr.h> #define MAX_TOPO_LEVEL 6 / This file contains declarations of usbcore internals that are mostly * used or exposed by Host Controller Drivers. / / * USB Packet IDs (PIDs) / #define USB_PID_EXT 0xf0 / USB 2.0 LPM ECN / #define USB_PID_OUT 0xe1 #define USB_PID_ACK 0xd2 #define USB_PID_DATA0 0xc3 #define USB_PID_PING 0xb4 / USB 2.0 / #define USB_PID_SOF 0xa5 #define USB_PID_NYET 0x96 / USB 2.0 / #define USB_PID_DATA2 0x87 / USB 2.0 / #define USB_PID_SPLIT 0x78 / USB 2.0 / #define USB_PID_IN 0x69 #define USB_PID_NAK 0x5a #define USB_PID_DATA1 0x4b #define USB_PID_PREAMBLE 0x3c / Token mode / #define USB_PID_ERR 0x3c / USB 2.0: handshake mode / #define USB_PID_SETUP 0x2d #define USB_PID_STALL 0x1e #define USB_PID_MDATA 0x0f / USB 2.0 / /-------------------------------------------------------------------------/ / * USB Host Controller Driver (usb_hcd) framework * * Since "struct usb_bus" is so thin, you can't share much code in it. * This framework is a layer over that, and should be more sharable. / /-------------------------------------------------------------------------/ struct giveback_urb_bh { bool running; bool high_prio; spinlock_t lock; struct list_head head; struct tasklet_struct bh; struct usb_host_endpoint completing_ep; }; enum usb_dev_authorize_policy { USB_DEVICE_AUTHORIZE_NONE = 0, USB_DEVICE_AUTHORIZE_ALL = 1, USB_DEVICE_AUTHORIZE_INTERNAL = 2, }; struct usb_hcd { /* * housekeeping / struct usb_bus self; / hcd is-a bus / struct kref kref; / reference counter / const char product_desc; /* product/vendor string / int speed; / Speed for this roothub. * May be different from * hcd->driver->flags & HCD_MASK / char irq_descr[24]; / driver + bus # / struct timer_list rh_timer; / drives root-hub polling / struct urb status_urb; /* the current status urb / #ifdef CONFIG_PM struct work_struct wakeup_work; / for remote wakeup / #endif struct work_struct died_work; / for when the device dies / / * hardware info/state / const struct hc_driver driver; /* hw-specific hooks / / * OTG and some Host controllers need software interaction with phys; * other external phys should be software-transparent / struct usb_phy usb_phy; struct usb_phy_roothub phy_roothub; / Flags that need to be manipulated atomically because they can * change while the host controller is running. Always use * set_bit() or clear_bit() to change their values. / unsigned long flags; #define HCD_FLAG_HW_ACCESSIBLE 0 / at full power / #define HCD_FLAG_POLL_RH 2 / poll for rh status? / #define HCD_FLAG_POLL_PENDING 3 / status has changed? / #define HCD_FLAG_WAKEUP_PENDING 4 / root hub is resuming? / #define HCD_FLAG_RH_RUNNING 5 / root hub is running? / #define HCD_FLAG_DEAD 6 / controller has died? / #define HCD_FLAG_INTF_AUTHORIZED 7 / authorize interfaces? / #define HCD_FLAG_DEFER_RH_REGISTER 8 / Defer roothub registration / / The flags can be tested using these macros; they are likely to * be slightly faster than test_bit(). / #define HCD_HW_ACCESSIBLE(hcd) ((hcd)->flags & (1U << HCD_FLAG_HW_ACCESSIBLE)) #define HCD_POLL_RH(hcd) ((hcd)->flags & (1U << HCD_FLAG_POLL_RH)) #define HCD_POLL_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_POLL_PENDING)) #define HCD_WAKEUP_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_WAKEUP_PENDING)) #define HCD_RH_RUNNING(hcd) ((hcd)->flags & (1U << HCD_FLAG_RH_RUNNING)) #define HCD_DEAD(hcd) ((hcd)->flags & (1U << HCD_FLAG_DEAD)) #define HCD_DEFER_RH_REGISTER(hcd) ((hcd)->flags & (1U << HCD_FLAG_DEFER_RH_REGISTER)) / * Specifies if interfaces are authorized by default * or they require explicit user space authorization; this bit is * settable through /sys/class/usb_host/X/interface_authorized_default / #define HCD_INTF_AUTHORIZED(hcd) \ ((hcd)->flags & (1U << HCD_FLAG_INTF_AUTHORIZED)) / * Specifies if devices are authorized by default * or they require explicit user space authorization; this bit is * settable through /sys/class/usb_host/X/authorized_default / enum usb_dev_authorize_policy dev_policy; / Flags that get set only during HCD registration or removal. / unsigned rh_registered:1;/ is root hub registered? / unsigned rh_pollable:1; / may we poll the root hub? / unsigned msix_enabled:1; / driver has MSI-X enabled? / unsigned msi_enabled:1; / driver has MSI enabled? / / * do not manage the PHY state in the HCD core, instead let the driver * handle this (for example if the PHY can only be turned on after a * specific event) / unsigned skip_phy_initialization:1; / The next flag is a stopgap, to be removed when all the HCDs * support the new root-hub polling mechanism. / unsigned uses_new_polling:1; unsigned wireless:1; / Wireless USB HCD / unsigned has_tt:1; / Integrated TT in root hub / unsigned amd_resume_bug:1; / AMD remote wakeup quirk / unsigned can_do_streams:1; / HC supports streams / unsigned tpl_support:1; / OTG & EH TPL support / unsigned cant_recv_wakeups:1; / wakeup requests from downstream aren't received / unsigned int irq; / irq allocated / void __iomem regs; /* device memory/io / resource_size_t rsrc_start; / memory/io resource start / resource_size_t rsrc_len; / memory/io resource length / unsigned power_budget; / in mA, 0 = no limit / struct giveback_urb_bh high_prio_bh; struct giveback_urb_bh low_prio_bh; / bandwidth_mutex should be taken before adding or removing * any new bus bandwidth constraints: * 1. Before adding a configuration for a new device. * 2. Before removing the configuration to put the device into * the addressed state. * 3. Before selecting a different configuration. * 4. Before selecting an alternate interface setting. * * bandwidth_mutex should be dropped after a successful control message * to the device, or resetting the bandwidth after a failed attempt. / struct mutex address0_mutex; struct mutex bandwidth_mutex; struct usb_hcd shared_hcd; struct usb_hcd primary_hcd; #define HCD_BUFFER_POOLS 4 struct dma_pool pool[HCD_BUFFER_POOLS]; int state; # define __ACTIVE 0x01 # define __SUSPEND 0x04 # define __TRANSIENT 0x80 # define HC_STATE_HALT 0 # define HC_STATE_RUNNING (__ACTIVE) # define HC_STATE_QUIESCING (__SUSPEND\|__TRANSIENT\|__ACTIVE) # define HC_STATE_RESUMING (__SUSPEND\|__TRANSIENT) # define HC_STATE_SUSPENDED (__SUSPEND) #define HC_IS_RUNNING(state) ((state) & __ACTIVE) #define HC_IS_SUSPENDED(state) ((state) & __SUSPEND) /* memory pool for HCs having local memory, or %NULL / struct gen_pool localmem_pool; /* more shared queuing code would be good; it should support * smarter scheduling, handle transaction translators, etc; * input size of periodic table to an interrupt scheduler. * (ohci 32, uhci 1024, ehci 256/512/1024). / / The HC driver's private data is stored at the end of * this structure. / unsigned long hcd_priv[0] __attribute__ ((aligned(sizeof(s64)))); }; / 2.4 does this a bit differently ... / static inline struct usb_bus hcd_to_bus(struct usb_hcd hcd) { return &hcd->self; } static inline struct usb_hcd bus_to_hcd(struct usb_bus bus) { return container_of(bus, struct usb_hcd, self); } /-------------------------------------------------------------------------/ struct hc_driver { const char description; /* "ehci-hcd" etc / const char product_desc; /* product/vendor string / size_t hcd_priv_size; / size of private data / / irq handler / irqreturn_t (irq) (struct usb_hcd hcd); int flags; #define HCD_MEMORY 0x0001 / HC regs use memory (else I/O) / #define HCD_DMA 0x0002 / HC uses DMA / #define HCD_SHARED 0x0004 / Two (or more) usb_hcds share HW / #define HCD_USB11 0x0010 / USB 1.1 / #define HCD_USB2 0x0020 / USB 2.0 / #define HCD_USB25 0x0030 / Wireless USB 1.0 (USB 2.5)/ #define HCD_USB3 0x0040 / USB 3.0 / #define HCD_USB31 0x0050 / USB 3.1 / #define HCD_USB32 0x0060 / USB 3.2 / #define HCD_MASK 0x0070 #define HCD_BH 0x0100 / URB complete in BH context / / called to init HCD and root hub / int (reset) (struct usb_hcd hcd); int (start) (struct usb_hcd hcd); / NOTE: these suspend/resume calls relate to the HC as * a whole, not just the root hub; they're for PCI bus glue. / / called after suspending the hub, before entering D3 etc / int (pci_suspend)(struct usb_hcd hcd, bool do_wakeup); / called after entering D0 (etc), before resuming the hub / int (pci_resume)(struct usb_hcd hcd, bool hibernated); / cleanly make HCD stop writing memory and doing I/O / void (stop) (struct usb_hcd hcd); / shutdown HCD / void (shutdown) (struct usb_hcd hcd); / return current frame number / int (get_frame_number) (struct usb_hcd hcd); / manage i/o requests, device state / int (urb_enqueue)(struct usb_hcd hcd, struct urb urb, gfp_t mem_flags); int (urb_dequeue)(struct usb_hcd hcd, struct urb urb, int status); / * (optional) these hooks allow an HCD to override the default DMA * mapping and unmapping routines. In general, they shouldn't be * necessary unless the host controller has special DMA requirements, * such as alignment contraints. If these are not specified, the * general usb_hcd_(un)?map_urb_for_dma functions will be used instead * (and it may be a good idea to call these functions in your HCD * implementation) / int (map_urb_for_dma)(struct usb_hcd hcd, struct urb urb, gfp_t mem_flags); void (unmap_urb_for_dma)(struct usb_hcd hcd, struct urb urb); / hw synch, freeing endpoint resources that urb_dequeue can't / void (endpoint_disable)(struct usb_hcd hcd, struct usb_host_endpoint ep); /* (optional) reset any endpoint state such as sequence number and current window / void (endpoint_reset)(struct usb_hcd hcd, struct usb_host_endpoint ep); /* root hub support / int (hub_status_data) (struct usb_hcd hcd, char buf); int (hub_control) (struct usb_hcd hcd, u16 typeReq, u16 wValue, u16 wIndex, char buf, u16 wLength); int (bus_suspend)(struct usb_hcd ); int (bus_resume)(struct usb_hcd ); int (start_port_reset)(struct usb_hcd , unsigned port_num); unsigned long (get_resuming_ports)(struct usb_hcd ); / force handover of high-speed port to full-speed companion / void (relinquish_port)(struct usb_hcd , int); / has a port been handed over to a companion? / int (port_handed_over)(struct usb_hcd , int); / CLEAR_TT_BUFFER completion callback / void (clear_tt_buffer_complete)(struct usb_hcd , struct usb_host_endpoint ); /* xHCI specific functions / / Called by usb_alloc_dev to alloc HC device structures / int (alloc_dev)(struct usb_hcd , struct usb_device ); /* Called by usb_disconnect to free HC device structures / void (free_dev)(struct usb_hcd , struct usb_device ); /* Change a group of bulk endpoints to support multiple stream IDs / int (alloc_streams)(struct usb_hcd hcd, struct usb_device udev, struct usb_host_endpoint *eps, unsigned int num_eps, unsigned int num_streams, gfp_t mem_flags); / Reverts a group of bulk endpoints back to not using stream IDs. * Can fail if we run out of memory. / int (free_streams)(struct usb_hcd hcd, struct usb_device udev, struct usb_host_endpoint *eps, unsigned int num_eps, gfp_t mem_flags); / Bandwidth computation functions / / Note that add_endpoint() can only be called once per endpoint before * check_bandwidth() or reset_bandwidth() must be called. * drop_endpoint() can only be called once per endpoint also. * A call to xhci_drop_endpoint() followed by a call to * xhci_add_endpoint() will add the endpoint to the schedule with * possibly new parameters denoted by a different endpoint descriptor * in usb_host_endpoint. A call to xhci_add_endpoint() followed by a * call to xhci_drop_endpoint() is not allowed. / / Allocate endpoint resources and add them to a new schedule / int (add_endpoint)(struct usb_hcd , struct usb_device , struct usb_host_endpoint ); / Drop an endpoint from a new schedule / int (drop_endpoint)(struct usb_hcd , struct usb_device , struct usb_host_endpoint ); / Check that a new hardware configuration, set using * endpoint_enable and endpoint_disable, does not exceed bus * bandwidth. This must be called before any set configuration * or set interface requests are sent to the device. / int (check_bandwidth)(struct usb_hcd , struct usb_device ); /* Reset the device schedule to the last known good schedule, * which was set from a previous successful call to * check_bandwidth(). This reverts any add_endpoint() and * drop_endpoint() calls since that last successful call. * Used for when a check_bandwidth() call fails due to resource * or bandwidth constraints. / void (reset_bandwidth)(struct usb_hcd , struct usb_device ); /* Returns the hardware-chosen device address / int (address_device)(struct usb_hcd , struct usb_device udev); /* prepares the hardware to send commands to the device / int (enable_device)(struct usb_hcd , struct usb_device udev); /* Notifies the HCD after a hub descriptor is fetched. * Will block. / int (update_hub_device)(struct usb_hcd , struct usb_device hdev, struct usb_tt tt, gfp_t mem_flags); int (reset_device)(struct usb_hcd , struct usb_device ); /* Notifies the HCD after a device is connected and its * address is set / int (update_device)(struct usb_hcd , struct usb_device ); int (set_usb2_hw_lpm)(struct usb_hcd , struct usb_device , int); / USB 3.0 Link Power Management / / Returns the USB3 hub-encoded value for the U1/U2 timeout. / int (enable_usb3_lpm_timeout)(struct usb_hcd , struct usb_device , enum usb3_link_state state); /* The xHCI host controller can still fail the command to * disable the LPM timeouts, so this can return an error code. / int (disable_usb3_lpm_timeout)(struct usb_hcd , struct usb_device , enum usb3_link_state state); int (find_raw_port_number)(struct usb_hcd , int); /* Call for power on/off the port if necessary / int (port_power)(struct usb_hcd hcd, int portnum, bool enable); }; static inline int hcd_giveback_urb_in_bh(struct usb_hcd hcd) { return hcd->driver->flags & HCD_BH; } static inline bool hcd_periodic_completion_in_progress(struct usb_hcd hcd, struct usb_host_endpoint ep) { return hcd->high_prio_bh.completing_ep == ep; } static inline bool hcd_uses_dma(struct usb_hcd hcd) { return IS_ENABLED(CONFIG_HAS_DMA) && (hcd->driver->flags & HCD_DMA); } extern int usb_hcd_link_urb_to_ep(struct usb_hcd hcd, struct urb urb); extern int usb_hcd_check_unlink_urb(struct usb_hcd hcd, struct urb urb, int status); extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd hcd, struct urb urb); extern int usb_hcd_submit_urb(struct urb urb, gfp_t mem_flags); extern int usb_hcd_unlink_urb(struct urb urb, int status); extern void usb_hcd_giveback_urb(struct usb_hcd hcd, struct urb urb, int status); extern int usb_hcd_map_urb_for_dma(struct usb_hcd hcd, struct urb urb, gfp_t mem_flags); extern void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd , struct urb ); extern void usb_hcd_unmap_urb_for_dma(struct usb_hcd , struct urb ); extern void usb_hcd_flush_endpoint(struct usb_device udev, struct usb_host_endpoint ep); extern void usb_hcd_disable_endpoint(struct usb_device udev, struct usb_host_endpoint ep); extern void usb_hcd_reset_endpoint(struct usb_device udev, struct usb_host_endpoint ep); extern void usb_hcd_synchronize_unlinks(struct usb_device udev); extern int usb_hcd_alloc_bandwidth(struct usb_device udev, struct usb_host_config new_config, struct usb_host_interface old_alt, struct usb_host_interface new_alt); extern int usb_hcd_get_frame_number(struct usb_device udev); struct usb_hcd __usb_create_hcd(const struct hc_driver driver, struct device sysdev, struct device dev, const char bus_name, struct usb_hcd primary_hcd); extern struct usb_hcd usb_create_hcd(const struct hc_driver driver, struct device dev, const char bus_name); extern struct usb_hcd usb_create_shared_hcd(const struct hc_driver driver, struct device dev, const char bus_name, struct usb_hcd shared_hcd); extern struct usb_hcd usb_get_hcd(struct usb_hcd hcd); extern void usb_put_hcd(struct usb_hcd hcd); extern int usb_hcd_is_primary_hcd(struct usb_hcd hcd); extern int usb_add_hcd(struct usb_hcd hcd, unsigned int irqnum, unsigned long irqflags); extern void usb_remove_hcd(struct usb_hcd hcd); extern int usb_hcd_find_raw_port_number(struct usb_hcd hcd, int port1); int usb_hcd_setup_local_mem(struct usb_hcd hcd, phys_addr_t phys_addr, dma_addr_t dma, size_t size); struct platform_device; extern void usb_hcd_platform_shutdown(struct platform_device dev); #ifdef CONFIG_USB_PCI struct pci_dev; struct pci_device_id; extern int usb_hcd_pci_probe(struct pci_dev dev, const struct pci_device_id id); extern void usb_hcd_pci_remove(struct pci_dev dev); extern void usb_hcd_pci_shutdown(struct pci_dev dev); extern int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev dev); #ifdef CONFIG_PM extern const struct dev_pm_ops usb_hcd_pci_pm_ops; #endif #endif /* CONFIG_USB_PCI / / pci-ish (pdev null is ok) buffer alloc/mapping support / void usb_init_pool_max(void); int hcd_buffer_create(struct usb_hcd hcd); void hcd_buffer_destroy(struct usb_hcd hcd); void hcd_buffer_alloc(struct usb_bus bus, size_t size, gfp_t mem_flags, dma_addr_t dma); void hcd_buffer_free(struct usb_bus bus, size_t size, void addr, dma_addr_t dma); void hcd_buffer_alloc_pages(struct usb_hcd hcd, size_t size, gfp_t mem_flags, dma_addr_t dma); void hcd_buffer_free_pages(struct usb_hcd hcd, size_t size, void addr, dma_addr_t dma); / generic bus glue, needed for host controllers that don't use PCI / extern irqreturn_t usb_hcd_irq(int irq, void __hcd); extern void usb_hc_died(struct usb_hcd hcd); extern void usb_hcd_poll_rh_status(struct usb_hcd hcd); extern void usb_wakeup_notification(struct usb_device hdev, unsigned int portnum); extern void usb_hcd_start_port_resume(struct usb_bus bus, int portnum); extern void usb_hcd_end_port_resume(struct usb_bus bus, int portnum); / The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) / #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1) #define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << (ep))) #define usb_settoggle(dev, ep, out, bit) \ ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) \| \ ((bit) << (ep))) / -------------------------------------------------------------------------- / / Enumeration is only for the hub driver, or HCD virtual root hubs / extern struct usb_device usb_alloc_dev(struct usb_device parent, struct usb_bus , unsigned port); extern int usb_new_device(struct usb_device dev); extern void usb_disconnect(struct usb_device ); extern int usb_get_configuration(struct usb_device dev); extern void usb_destroy_configuration(struct usb_device dev); /-------------------------------------------------------------------------/ / * HCD Root Hub support / #include <linux/usb/ch11.h> / * As of USB 2.0, full/low speed devices are segregated into trees. * One type grows from USB 1.1 host controllers (OHCI, UHCI etc). * The other type grows from high speed hubs when they connect to * full/low speed devices using "Transaction Translators" (TTs). * * TTs should only be known to the hub driver, and high speed bus * drivers (only EHCI for now). They affect periodic scheduling and * sometimes control/bulk error recovery. / struct usb_device; struct usb_tt { struct usb_device hub; /* upstream highspeed hub / int multi; / true means one TT per port / unsigned think_time; / think time in ns / void hcpriv; /* HCD private data / / for control/bulk error recovery (CLEAR_TT_BUFFER) / spinlock_t lock; struct list_head clear_list; / of usb_tt_clear / struct work_struct clear_work; }; struct usb_tt_clear { struct list_head clear_list; unsigned tt; u16 devinfo; struct usb_hcd hcd; struct usb_host_endpoint ep; }; extern int usb_hub_clear_tt_buffer(struct urb urb); extern void usb_ep0_reinit(struct usb_device ); / (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 / #define DeviceRequest \ ((USB_DIR_IN\|USB_TYPE_STANDARD\|USB_RECIP_DEVICE)<<8) #define DeviceOutRequest \ ((USB_DIR_OUT\|USB_TYPE_STANDARD\|USB_RECIP_DEVICE)<<8) #define InterfaceRequest \ ((USB_DIR_IN\|USB_TYPE_STANDARD\|USB_RECIP_INTERFACE)<<8) #define EndpointRequest \ ((USB_DIR_IN\|USB_TYPE_STANDARD\|USB_RECIP_ENDPOINT)<<8) #define EndpointOutRequest \ ((USB_DIR_OUT\|USB_TYPE_STANDARD\|USB_RECIP_ENDPOINT)<<8) / class requests from the USB 2.0 hub spec, table 11-15 / #define HUB_CLASS_REQ(dir, type, request) ((((dir) \| (type)) << 8) \| (request)) / GetBusState and SetHubDescriptor are optional, omitted / #define ClearHubFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_HUB, USB_REQ_CLEAR_FEATURE) #define ClearPortFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_PORT, USB_REQ_CLEAR_FEATURE) #define GetHubDescriptor HUB_CLASS_REQ(USB_DIR_IN, USB_RT_HUB, USB_REQ_GET_DESCRIPTOR) #define GetHubStatus HUB_CLASS_REQ(USB_DIR_IN, USB_RT_HUB, USB_REQ_GET_STATUS) #define GetPortStatus HUB_CLASS_REQ(USB_DIR_IN, USB_RT_PORT, USB_REQ_GET_STATUS) #define SetHubFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_HUB, USB_REQ_SET_FEATURE) #define SetPortFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_PORT, USB_REQ_SET_FEATURE) #define ClearTTBuffer HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_PORT, HUB_CLEAR_TT_BUFFER) #define ResetTT HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_PORT, HUB_RESET_TT) #define GetTTState HUB_CLASS_REQ(USB_DIR_IN, USB_RT_PORT, HUB_GET_TT_STATE) #define StopTT HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_PORT, HUB_STOP_TT) /-------------------------------------------------------------------------/ / class requests from USB 3.1 hub spec, table 10-7 / #define SetHubDepth HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_HUB, HUB_SET_DEPTH) #define GetPortErrorCount HUB_CLASS_REQ(USB_DIR_IN, USB_RT_PORT, HUB_GET_PORT_ERR_COUNT) / * Generic bandwidth allocation constants/support / #define FRAME_TIME_USECS 1000L #define BitTime(bytecount) (7 8 * bytecount / 6) /* with integer truncation / / Trying not to use worst-case bit-stuffing * of (7/6 * 8 * bytecount) = 9.33 * bytecount / / bytecount = data payload byte count / #define NS_TO_US(ns) DIV_ROUND_UP(ns, 1000L) / convert nanoseconds to microseconds, rounding up / / * Full/low speed bandwidth allocation constants/support. / #define BW_HOST_DELAY 1000L / nanoseconds / #define BW_HUB_LS_SETUP 333L / nanoseconds / / 4 full-speed bit times (est.) / #define FRAME_TIME_BITS 12000L / frame = 1 millisecond / #define FRAME_TIME_MAX_BITS_ALLOC (90L FRAME_TIME_BITS / 100L) #define FRAME_TIME_MAX_USECS_ALLOC (90L * FRAME_TIME_USECS / 100L) /* * Ceiling [nano/micro]seconds (typical) for that many bytes at high speed * ISO is a bit less, no ACK ... from USB 2.0 spec, 5.11.3 (and needed * to preallocate bandwidth) / #define USB2_HOST_DELAY 5 / nsec, guess / #define HS_NSECS(bytes) (((55 8 * 2083) \ + (2083UL * (3 + BitTime(bytes))))/1000 \ + USB2_HOST_DELAY) #define HS_NSECS_ISO(bytes) (((38 * 8 * 2083) \ + (2083UL * (3 + BitTime(bytes))))/1000 \ + USB2_HOST_DELAY) #define HS_USECS(bytes) NS_TO_US(HS_NSECS(bytes)) #define HS_USECS_ISO(bytes) NS_TO_US(HS_NSECS_ISO(bytes)) extern long usb_calc_bus_time(int speed, int is_input, int isoc, int bytecount); /-------------------------------------------------------------------------/ extern void usb_set_device_state(struct usb_device udev, enum usb_device_state new_state); /-------------------------------------------------------------------------/ / exported only within usbcore / extern struct idr usb_bus_idr; extern struct mutex usb_bus_idr_lock; extern wait_queue_head_t usb_kill_urb_queue; #define usb_endpoint_out(ep_dir) (!((ep_dir) & USB_DIR_IN)) #ifdef CONFIG_PM extern unsigned usb_wakeup_enabled_descendants(struct usb_device udev); extern void usb_root_hub_lost_power(struct usb_device rhdev); extern int hcd_bus_suspend(struct usb_device rhdev, pm_message_t msg); extern int hcd_bus_resume(struct usb_device rhdev, pm_message_t msg); extern void usb_hcd_resume_root_hub(struct usb_hcd hcd); #else static inline unsigned usb_wakeup_enabled_descendants(struct usb_device udev) { return 0; } static inline void usb_hcd_resume_root_hub(struct usb_hcd hcd) { return; } #endif /* CONFIG_PM / /-------------------------------------------------------------------------/ #if defined(CONFIG_USB_MON) \|\| defined(CONFIG_USB_MON_MODULE) struct usb_mon_operations { void (urb_submit)(struct usb_bus bus, struct urb urb); void (urb_submit_error)(struct usb_bus bus, struct urb urb, int err); void (urb_complete)(struct usb_bus bus, struct urb urb, int status); /* void (urb_unlink)(struct usb_bus bus, struct urb urb); / }; extern const struct usb_mon_operations mon_ops; static inline void usbmon_urb_submit(struct usb_bus bus, struct urb urb) { if (bus->monitored) (mon_ops->urb_submit)(bus, urb); } static inline void usbmon_urb_submit_error(struct usb_bus bus, struct urb urb, int error) { if (bus->monitored) (mon_ops->urb_submit_error)(bus, urb, error); } static inline void usbmon_urb_complete(struct usb_bus bus, struct urb urb, int status) { if (bus->monitored) (mon_ops->urb_complete)(bus, urb, status); } int usb_mon_register(const struct usb_mon_operations ops); void usb_mon_deregister(void); #else static inline void usbmon_urb_submit(struct usb_bus bus, struct urb urb) {} static inline void usbmon_urb_submit_error(struct usb_bus bus, struct urb urb, int error) {} static inline void usbmon_urb_complete(struct usb_bus bus, struct urb urb, int status) {} #endif / CONFIG_USB_MON \|\| CONFIG_USB_MON_MODULE / /-------------------------------------------------------------------------/ / random stuff / #define RUN_CONTEXT (in_irq() ? "in_irq" \ : (in_interrupt() ? "in_interrupt" : "can sleep")) / This rwsem is for use only by the hub driver and ehci-hcd. * Nobody else should touch it. / extern struct rw_semaphore ehci_cf_port_reset_rwsem; / Keep track of which host controller drivers are loaded / #define USB_UHCI_LOADED 0 #define USB_OHCI_LOADED 1 #define USB_EHCI_LOADED 2 extern unsigned long usb_hcds_loaded; #endif / __KERNEL__ / #endif / __USB_CORE_HCD_H */

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