e09711aef4
This adds think_time to the usb_tt struct and sets it appropriately (measured in ns); this can help us implement better split transaction scheduling. Signed-off-by: Dan Streetman <ddstreet@ieee.org> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
235 lines
6.3 KiB
C
235 lines
6.3 KiB
C
#ifndef __LINUX_HUB_H
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#define __LINUX_HUB_H
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/*
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* Hub protocol and driver data structures.
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*
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* Some of these are known to the "virtual root hub" code
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* in host controller drivers.
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*/
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#include <linux/list.h>
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#include <linux/workqueue.h>
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#include <linux/compiler.h> /* likely()/unlikely() */
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/*
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* Hub request types
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*/
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#define USB_RT_HUB (USB_TYPE_CLASS | USB_RECIP_DEVICE)
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#define USB_RT_PORT (USB_TYPE_CLASS | USB_RECIP_OTHER)
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/*
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* Hub class requests
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* See USB 2.0 spec Table 11-16
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*/
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#define HUB_CLEAR_TT_BUFFER 8
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#define HUB_RESET_TT 9
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#define HUB_GET_TT_STATE 10
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#define HUB_STOP_TT 11
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/*
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* Hub Class feature numbers
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* See USB 2.0 spec Table 11-17
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*/
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#define C_HUB_LOCAL_POWER 0
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#define C_HUB_OVER_CURRENT 1
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/*
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* Port feature numbers
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* See USB 2.0 spec Table 11-17
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*/
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#define USB_PORT_FEAT_CONNECTION 0
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#define USB_PORT_FEAT_ENABLE 1
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#define USB_PORT_FEAT_SUSPEND 2
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#define USB_PORT_FEAT_OVER_CURRENT 3
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#define USB_PORT_FEAT_RESET 4
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#define USB_PORT_FEAT_POWER 8
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#define USB_PORT_FEAT_LOWSPEED 9
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#define USB_PORT_FEAT_HIGHSPEED 10
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#define USB_PORT_FEAT_C_CONNECTION 16
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#define USB_PORT_FEAT_C_ENABLE 17
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#define USB_PORT_FEAT_C_SUSPEND 18
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#define USB_PORT_FEAT_C_OVER_CURRENT 19
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#define USB_PORT_FEAT_C_RESET 20
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#define USB_PORT_FEAT_TEST 21
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#define USB_PORT_FEAT_INDICATOR 22
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/*
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* Hub Status and Hub Change results
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* See USB 2.0 spec Table 11-19 and Table 11-20
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*/
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struct usb_port_status {
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__le16 wPortStatus;
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__le16 wPortChange;
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} __attribute__ ((packed));
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/*
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* wPortStatus bit field
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* See USB 2.0 spec Table 11-21
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*/
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#define USB_PORT_STAT_CONNECTION 0x0001
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#define USB_PORT_STAT_ENABLE 0x0002
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#define USB_PORT_STAT_SUSPEND 0x0004
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#define USB_PORT_STAT_OVERCURRENT 0x0008
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#define USB_PORT_STAT_RESET 0x0010
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/* bits 5 to 7 are reserved */
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#define USB_PORT_STAT_POWER 0x0100
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#define USB_PORT_STAT_LOW_SPEED 0x0200
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#define USB_PORT_STAT_HIGH_SPEED 0x0400
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#define USB_PORT_STAT_TEST 0x0800
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#define USB_PORT_STAT_INDICATOR 0x1000
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/* bits 13 to 15 are reserved */
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/*
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* wPortChange bit field
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* See USB 2.0 spec Table 11-22
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* Bits 0 to 4 shown, bits 5 to 15 are reserved
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*/
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#define USB_PORT_STAT_C_CONNECTION 0x0001
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#define USB_PORT_STAT_C_ENABLE 0x0002
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#define USB_PORT_STAT_C_SUSPEND 0x0004
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#define USB_PORT_STAT_C_OVERCURRENT 0x0008
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#define USB_PORT_STAT_C_RESET 0x0010
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/*
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* wHubCharacteristics (masks)
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* See USB 2.0 spec Table 11-13, offset 3
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*/
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#define HUB_CHAR_LPSM 0x0003 /* D1 .. D0 */
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#define HUB_CHAR_COMPOUND 0x0004 /* D2 */
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#define HUB_CHAR_OCPM 0x0018 /* D4 .. D3 */
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#define HUB_CHAR_TTTT 0x0060 /* D6 .. D5 */
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#define HUB_CHAR_PORTIND 0x0080 /* D7 */
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struct usb_hub_status {
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__le16 wHubStatus;
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__le16 wHubChange;
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} __attribute__ ((packed));
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/*
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* Hub Status & Hub Change bit masks
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* See USB 2.0 spec Table 11-19 and Table 11-20
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* Bits 0 and 1 for wHubStatus and wHubChange
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* Bits 2 to 15 are reserved for both
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*/
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#define HUB_STATUS_LOCAL_POWER 0x0001
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#define HUB_STATUS_OVERCURRENT 0x0002
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#define HUB_CHANGE_LOCAL_POWER 0x0001
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#define HUB_CHANGE_OVERCURRENT 0x0002
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/*
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* Hub descriptor
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* See USB 2.0 spec Table 11-13
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*/
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#define USB_DT_HUB (USB_TYPE_CLASS | 0x09)
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#define USB_DT_HUB_NONVAR_SIZE 7
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struct usb_hub_descriptor {
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__u8 bDescLength;
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__u8 bDescriptorType;
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__u8 bNbrPorts;
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__u16 wHubCharacteristics;
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__u8 bPwrOn2PwrGood;
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__u8 bHubContrCurrent;
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/* add 1 bit for hub status change; round to bytes */
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__u8 DeviceRemovable[(USB_MAXCHILDREN + 1 + 7) / 8];
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__u8 PortPwrCtrlMask[(USB_MAXCHILDREN + 1 + 7) / 8];
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} __attribute__ ((packed));
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/* port indicator status selectors, tables 11-7 and 11-25 */
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#define HUB_LED_AUTO 0
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#define HUB_LED_AMBER 1
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#define HUB_LED_GREEN 2
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#define HUB_LED_OFF 3
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enum hub_led_mode {
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INDICATOR_AUTO = 0,
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INDICATOR_CYCLE,
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/* software blinks for attention: software, hardware, reserved */
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INDICATOR_GREEN_BLINK, INDICATOR_GREEN_BLINK_OFF,
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INDICATOR_AMBER_BLINK, INDICATOR_AMBER_BLINK_OFF,
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INDICATOR_ALT_BLINK, INDICATOR_ALT_BLINK_OFF
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} __attribute__ ((packed));
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struct usb_device;
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/* Transaction Translator Think Times, in bits */
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#define HUB_TTTT_8_BITS 0x00
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#define HUB_TTTT_16_BITS 0x20
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#define HUB_TTTT_24_BITS 0x40
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#define HUB_TTTT_32_BITS 0x60
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/*
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* As of USB 2.0, full/low speed devices are segregated into trees.
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* One type grows from USB 1.1 host controllers (OHCI, UHCI etc).
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* The other type grows from high speed hubs when they connect to
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* full/low speed devices using "Transaction Translators" (TTs).
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*
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* TTs should only be known to the hub driver, and high speed bus
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* drivers (only EHCI for now). They affect periodic scheduling and
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* sometimes control/bulk error recovery.
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*/
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struct usb_tt {
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struct usb_device *hub; /* upstream highspeed hub */
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int multi; /* true means one TT per port */
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unsigned think_time; /* think time in ns */
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/* for control/bulk error recovery (CLEAR_TT_BUFFER) */
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spinlock_t lock;
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struct list_head clear_list; /* of usb_tt_clear */
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struct work_struct kevent;
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};
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struct usb_tt_clear {
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struct list_head clear_list;
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unsigned tt;
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u16 devinfo;
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};
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extern void usb_hub_tt_clear_buffer (struct usb_device *dev, int pipe);
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struct usb_hub {
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struct device *intfdev; /* the "interface" device */
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struct usb_device *hdev;
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struct urb *urb; /* for interrupt polling pipe */
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/* buffer for urb ... with extra space in case of babble */
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char (*buffer)[8];
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dma_addr_t buffer_dma; /* DMA address for buffer */
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union {
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struct usb_hub_status hub;
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struct usb_port_status port;
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} *status; /* buffer for status reports */
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int error; /* last reported error */
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int nerrors; /* track consecutive errors */
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struct list_head event_list; /* hubs w/data or errs ready */
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unsigned long event_bits[1]; /* status change bitmask */
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unsigned long change_bits[1]; /* ports with logical connect
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status change */
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unsigned long busy_bits[1]; /* ports being reset */
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#if USB_MAXCHILDREN > 31 /* 8*sizeof(unsigned long) - 1 */
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#error event_bits[] is too short!
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#endif
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struct usb_hub_descriptor *descriptor; /* class descriptor */
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struct usb_tt tt; /* Transaction Translator */
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u8 power_budget; /* in 2mA units; or zero */
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unsigned quiescing:1;
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unsigned activating:1;
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unsigned resume_root_hub:1;
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unsigned has_indicators:1;
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enum hub_led_mode indicator[USB_MAXCHILDREN];
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struct work_struct leds;
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};
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#endif /* __LINUX_HUB_H */
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