#ifndef __LINUX_HUB_H #define __LINUX_HUB_H /* * Hub protocol and driver data structures. * * Some of these are known to the "virtual root hub" code * in host controller drivers. */ #include #include #include /* likely()/unlikely() */ /* * Hub request types */ #define USB_RT_HUB (USB_TYPE_CLASS | USB_RECIP_DEVICE) #define USB_RT_PORT (USB_TYPE_CLASS | USB_RECIP_OTHER) /* * Hub class requests * See USB 2.0 spec Table 11-16 */ #define HUB_CLEAR_TT_BUFFER 8 #define HUB_RESET_TT 9 #define HUB_GET_TT_STATE 10 #define HUB_STOP_TT 11 /* * Hub Class feature numbers * See USB 2.0 spec Table 11-17 */ #define C_HUB_LOCAL_POWER 0 #define C_HUB_OVER_CURRENT 1 /* * Port feature numbers * See USB 2.0 spec Table 11-17 */ #define USB_PORT_FEAT_CONNECTION 0 #define USB_PORT_FEAT_ENABLE 1 #define USB_PORT_FEAT_SUSPEND 2 #define USB_PORT_FEAT_OVER_CURRENT 3 #define USB_PORT_FEAT_RESET 4 #define USB_PORT_FEAT_POWER 8 #define USB_PORT_FEAT_LOWSPEED 9 #define USB_PORT_FEAT_HIGHSPEED 10 #define USB_PORT_FEAT_C_CONNECTION 16 #define USB_PORT_FEAT_C_ENABLE 17 #define USB_PORT_FEAT_C_SUSPEND 18 #define USB_PORT_FEAT_C_OVER_CURRENT 19 #define USB_PORT_FEAT_C_RESET 20 #define USB_PORT_FEAT_TEST 21 #define USB_PORT_FEAT_INDICATOR 22 /* * Hub Status and Hub Change results * See USB 2.0 spec Table 11-19 and Table 11-20 */ struct usb_port_status { __le16 wPortStatus; __le16 wPortChange; } __attribute__ ((packed)); /* * wPortStatus bit field * See USB 2.0 spec Table 11-21 */ #define USB_PORT_STAT_CONNECTION 0x0001 #define USB_PORT_STAT_ENABLE 0x0002 #define USB_PORT_STAT_SUSPEND 0x0004 #define USB_PORT_STAT_OVERCURRENT 0x0008 #define USB_PORT_STAT_RESET 0x0010 /* bits 5 to 7 are reserved */ #define USB_PORT_STAT_POWER 0x0100 #define USB_PORT_STAT_LOW_SPEED 0x0200 #define USB_PORT_STAT_HIGH_SPEED 0x0400 #define USB_PORT_STAT_TEST 0x0800 #define USB_PORT_STAT_INDICATOR 0x1000 /* bits 13 to 15 are reserved */ /* * wPortChange bit field * See USB 2.0 spec Table 11-22 * Bits 0 to 4 shown, bits 5 to 15 are reserved */ #define USB_PORT_STAT_C_CONNECTION 0x0001 #define USB_PORT_STAT_C_ENABLE 0x0002 #define USB_PORT_STAT_C_SUSPEND 0x0004 #define USB_PORT_STAT_C_OVERCURRENT 0x0008 #define USB_PORT_STAT_C_RESET 0x0010 /* * wHubCharacteristics (masks) * See USB 2.0 spec Table 11-13, offset 3 */ #define HUB_CHAR_LPSM 0x0003 /* D1 .. D0 */ #define HUB_CHAR_COMPOUND 0x0004 /* D2 */ #define HUB_CHAR_OCPM 0x0018 /* D4 .. D3 */ #define HUB_CHAR_TTTT 0x0060 /* D6 .. D5 */ #define HUB_CHAR_PORTIND 0x0080 /* D7 */ struct usb_hub_status { __le16 wHubStatus; __le16 wHubChange; } __attribute__ ((packed)); /* * Hub Status & Hub Change bit masks * See USB 2.0 spec Table 11-19 and Table 11-20 * Bits 0 and 1 for wHubStatus and wHubChange * Bits 2 to 15 are reserved for both */ #define HUB_STATUS_LOCAL_POWER 0x0001 #define HUB_STATUS_OVERCURRENT 0x0002 #define HUB_CHANGE_LOCAL_POWER 0x0001 #define HUB_CHANGE_OVERCURRENT 0x0002 /* * Hub descriptor * See USB 2.0 spec Table 11-13 */ #define USB_DT_HUB (USB_TYPE_CLASS | 0x09) #define USB_DT_HUB_NONVAR_SIZE 7 struct usb_hub_descriptor { __u8 bDescLength; __u8 bDescriptorType; __u8 bNbrPorts; __le16 wHubCharacteristics; __u8 bPwrOn2PwrGood; __u8 bHubContrCurrent; /* add 1 bit for hub status change; round to bytes */ __u8 DeviceRemovable[(USB_MAXCHILDREN + 1 + 7) / 8]; __u8 PortPwrCtrlMask[(USB_MAXCHILDREN + 1 + 7) / 8]; } __attribute__ ((packed)); /* port indicator status selectors, tables 11-7 and 11-25 */ #define HUB_LED_AUTO 0 #define HUB_LED_AMBER 1 #define HUB_LED_GREEN 2 #define HUB_LED_OFF 3 enum hub_led_mode { INDICATOR_AUTO = 0, INDICATOR_CYCLE, /* software blinks for attention: software, hardware, reserved */ INDICATOR_GREEN_BLINK, INDICATOR_GREEN_BLINK_OFF, INDICATOR_AMBER_BLINK, INDICATOR_AMBER_BLINK_OFF, INDICATOR_ALT_BLINK, INDICATOR_ALT_BLINK_OFF } __attribute__ ((packed)); struct usb_device; /* Transaction Translator Think Times, in bits */ #define HUB_TTTT_8_BITS 0x00 #define HUB_TTTT_16_BITS 0x20 #define HUB_TTTT_24_BITS 0x40 #define HUB_TTTT_32_BITS 0x60 /* * 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_tt { struct usb_device *hub; /* upstream highspeed hub */ int multi; /* true means one TT per port */ unsigned think_time; /* think time in ns */ /* for control/bulk error recovery (CLEAR_TT_BUFFER) */ spinlock_t lock; struct list_head clear_list; /* of usb_tt_clear */ struct work_struct kevent; }; struct usb_tt_clear { struct list_head clear_list; unsigned tt; u16 devinfo; }; extern void usb_hub_tt_clear_buffer (struct usb_device *dev, int pipe); struct usb_hub { struct device *intfdev; /* the "interface" device */ struct usb_device *hdev; struct urb *urb; /* for interrupt polling pipe */ /* buffer for urb ... with extra space in case of babble */ char (*buffer)[8]; dma_addr_t buffer_dma; /* DMA address for buffer */ union { struct usb_hub_status hub; struct usb_port_status port; } *status; /* buffer for status reports */ int error; /* last reported error */ int nerrors; /* track consecutive errors */ struct list_head event_list; /* hubs w/data or errs ready */ unsigned long event_bits[1]; /* status change bitmask */ unsigned long change_bits[1]; /* ports with logical connect status change */ unsigned long busy_bits[1]; /* ports being reset or resumed */ #if USB_MAXCHILDREN > 31 /* 8*sizeof(unsigned long) - 1 */ #error event_bits[] is too short! #endif struct usb_hub_descriptor *descriptor; /* class descriptor */ struct usb_tt tt; /* Transaction Translator */ unsigned mA_per_port; /* current for each child */ unsigned limited_power:1; unsigned quiescing:1; unsigned activating:1; unsigned resume_root_hub:1; unsigned has_indicators:1; enum hub_led_mode indicator[USB_MAXCHILDREN]; struct delayed_work leds; }; #endif /* __LINUX_HUB_H */