patch-2.4.21 linux-2.4.21/drivers/usb/uhci.h
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- Lines: 442
- Date:
1969-12-31 16:00:00.000000000 -0800
- Orig file:
linux-2.4.20/drivers/usb/uhci.h
- Orig date:
2002-11-28 15:53:15.000000000 -0800
diff -urN linux-2.4.20/drivers/usb/uhci.h linux-2.4.21/drivers/usb/uhci.h
@@ -1,441 +0,0 @@
-#ifndef __LINUX_UHCI_H
-#define __LINUX_UHCI_H
-
-#include <linux/list.h>
-#include <linux/usb.h>
-
-/*
- * Universal Host Controller Interface data structures and defines
- */
-
-/* Command register */
-#define USBCMD 0
-#define USBCMD_RS 0x0001 /* Run/Stop */
-#define USBCMD_HCRESET 0x0002 /* Host reset */
-#define USBCMD_GRESET 0x0004 /* Global reset */
-#define USBCMD_EGSM 0x0008 /* Global Suspend Mode */
-#define USBCMD_FGR 0x0010 /* Force Global Resume */
-#define USBCMD_SWDBG 0x0020 /* SW Debug mode */
-#define USBCMD_CF 0x0040 /* Config Flag (sw only) */
-#define USBCMD_MAXP 0x0080 /* Max Packet (0 = 32, 1 = 64) */
-
-/* Status register */
-#define USBSTS 2
-#define USBSTS_USBINT 0x0001 /* Interrupt due to IOC */
-#define USBSTS_ERROR 0x0002 /* Interrupt due to error */
-#define USBSTS_RD 0x0004 /* Resume Detect */
-#define USBSTS_HSE 0x0008 /* Host System Error - basically PCI problems */
-#define USBSTS_HCPE 0x0010 /* Host Controller Process Error - the scripts were buggy */
-#define USBSTS_HCH 0x0020 /* HC Halted */
-
-/* Interrupt enable register */
-#define USBINTR 4
-#define USBINTR_TIMEOUT 0x0001 /* Timeout/CRC error enable */
-#define USBINTR_RESUME 0x0002 /* Resume interrupt enable */
-#define USBINTR_IOC 0x0004 /* Interrupt On Complete enable */
-#define USBINTR_SP 0x0008 /* Short packet interrupt enable */
-
-#define USBFRNUM 6
-#define USBFLBASEADD 8
-#define USBSOF 12
-
-/* USB port status and control registers */
-#define USBPORTSC1 16
-#define USBPORTSC2 18
-#define USBPORTSC_CCS 0x0001 /* Current Connect Status ("device present") */
-#define USBPORTSC_CSC 0x0002 /* Connect Status Change */
-#define USBPORTSC_PE 0x0004 /* Port Enable */
-#define USBPORTSC_PEC 0x0008 /* Port Enable Change */
-#define USBPORTSC_LS 0x0030 /* Line Status */
-#define USBPORTSC_RD 0x0040 /* Resume Detect */
-#define USBPORTSC_LSDA 0x0100 /* Low Speed Device Attached */
-#define USBPORTSC_PR 0x0200 /* Port Reset */
-#define USBPORTSC_SUSP 0x1000 /* Suspend */
-
-/* Legacy support register */
-#define USBLEGSUP 0xc0
-#define USBLEGSUP_DEFAULT 0x2000 /* only PIRQ enable set */
-
-#define UHCI_NULL_DATA_SIZE 0x7FF /* for UHCI controller TD */
-
-#define UHCI_PTR_BITS 0x000F
-#define UHCI_PTR_TERM 0x0001
-#define UHCI_PTR_QH 0x0002
-#define UHCI_PTR_DEPTH 0x0004
-
-#define UHCI_NUMFRAMES 1024 /* in the frame list [array] */
-#define UHCI_MAX_SOF_NUMBER 2047 /* in an SOF packet */
-#define CAN_SCHEDULE_FRAMES 1000 /* how far future frames can be scheduled */
-
-struct uhci_frame_list {
- __u32 frame[UHCI_NUMFRAMES];
-
- void *frame_cpu[UHCI_NUMFRAMES];
-
- dma_addr_t dma_handle;
-};
-
-struct urb_priv;
-
-struct uhci_qh {
- /* Hardware fields */
- __u32 link; /* Next queue */
- __u32 element; /* Queue element pointer */
-
- /* Software fields */
- dma_addr_t dma_handle;
-
- struct usb_device *dev;
- struct urb_priv *urbp;
-
- struct list_head list; /* P: uhci->frame_list_lock */
- struct list_head remove_list; /* P: uhci->remove_list_lock */
-} __attribute__((aligned(16)));
-
-/*
- * for TD <status>:
- */
-#define TD_CTRL_SPD (1 << 29) /* Short Packet Detect */
-#define TD_CTRL_C_ERR_MASK (3 << 27) /* Error Counter bits */
-#define TD_CTRL_C_ERR_SHIFT 27
-#define TD_CTRL_LS (1 << 26) /* Low Speed Device */
-#define TD_CTRL_IOS (1 << 25) /* Isochronous Select */
-#define TD_CTRL_IOC (1 << 24) /* Interrupt on Complete */
-#define TD_CTRL_ACTIVE (1 << 23) /* TD Active */
-#define TD_CTRL_STALLED (1 << 22) /* TD Stalled */
-#define TD_CTRL_DBUFERR (1 << 21) /* Data Buffer Error */
-#define TD_CTRL_BABBLE (1 << 20) /* Babble Detected */
-#define TD_CTRL_NAK (1 << 19) /* NAK Received */
-#define TD_CTRL_CRCTIMEO (1 << 18) /* CRC/Time Out Error */
-#define TD_CTRL_BITSTUFF (1 << 17) /* Bit Stuff Error */
-#define TD_CTRL_ACTLEN_MASK 0x7FF /* actual length, encoded as n - 1 */
-
-#define TD_CTRL_ANY_ERROR (TD_CTRL_STALLED | TD_CTRL_DBUFERR | \
- TD_CTRL_BABBLE | TD_CTRL_CRCTIME | TD_CTRL_BITSTUFF)
-
-#define uhci_status_bits(ctrl_sts) (ctrl_sts & 0xFE0000)
-#define uhci_actual_length(ctrl_sts) ((ctrl_sts + 1) & TD_CTRL_ACTLEN_MASK) /* 1-based */
-
-/*
- * for TD <info>: (a.k.a. Token)
- */
-#define TD_TOKEN_TOGGLE_SHIFT 19
-#define TD_TOKEN_TOGGLE (1 << 19)
-#define TD_TOKEN_PID_MASK 0xFF
-#define TD_TOKEN_EXPLEN_MASK 0x7FF /* expected length, encoded as n - 1 */
-
-#define uhci_maxlen(token) ((token) >> 21)
-#define uhci_expected_length(info) (((info >> 21) + 1) & TD_TOKEN_EXPLEN_MASK) /* 1-based */
-#define uhci_toggle(token) (((token) >> TD_TOKEN_TOGGLE_SHIFT) & 1)
-#define uhci_endpoint(token) (((token) >> 15) & 0xf)
-#define uhci_devaddr(token) (((token) >> 8) & 0x7f)
-#define uhci_devep(token) (((token) >> 8) & 0x7ff)
-#define uhci_packetid(token) ((token) & TD_TOKEN_PID_MASK)
-#define uhci_packetout(token) (uhci_packetid(token) != USB_PID_IN)
-#define uhci_packetin(token) (uhci_packetid(token) == USB_PID_IN)
-
-/*
- * The documentation says "4 words for hardware, 4 words for software".
- *
- * That's silly, the hardware doesn't care. The hardware only cares that
- * the hardware words are 16-byte aligned, and we can have any amount of
- * sw space after the TD entry as far as I can tell.
- *
- * But let's just go with the documentation, at least for 32-bit machines.
- * On 64-bit machines we probably want to take advantage of the fact that
- * hw doesn't really care about the size of the sw-only area.
- *
- * Alas, not anymore, we have more than 4 words for software, woops.
- * Everything still works tho, surprise! -jerdfelt
- */
-struct uhci_td {
- /* Hardware fields */
- __u32 link;
- __u32 status;
- __u32 info;
- __u32 buffer;
-
- /* Software fields */
- dma_addr_t dma_handle;
-
- struct usb_device *dev;
- struct urb *urb;
-
- struct list_head list; /* P: urb->lock */
-
- int frame;
- struct list_head fl_list; /* P: uhci->frame_list_lock */
-} __attribute__((aligned(16)));
-
-/*
- * There are various standard queues. We set up several different
- * queues for each of the three basic queue types: interrupt,
- * control, and bulk.
- *
- * - There are various different interrupt latencies: ranging from
- * every other USB frame (2 ms apart) to every 256 USB frames (ie
- * 256 ms apart). Make your choice according to how obnoxious you
- * want to be on the wire, vs how critical latency is for you.
- * - The control list is done every frame.
- * - There are 4 bulk lists, so that up to four devices can have a
- * bulk list of their own and when run concurrently all four lists
- * will be be serviced.
- *
- * This is a bit misleading, there are various interrupt latencies, but they
- * vary a bit, interrupt2 isn't exactly 2ms, it can vary up to 4ms since the
- * other queues can "override" it. interrupt4 can vary up to 8ms, etc. Minor
- * problem
- *
- * In the case of the root hub, these QH's are just head's of qh's. Don't
- * be scared, it kinda makes sense. Look at this wonderful picture care of
- * Linus:
- *
- * generic- -> dev1- -> generic- -> dev1- -> control- -> bulk- -> ...
- * iso-QH iso-QH irq-QH irq-QH QH QH
- * | | | | | |
- * End dev1-iso-TD1 End dev1-irq-TD1 ... ...
- * |
- * dev1-iso-TD2
- * |
- * ....
- *
- * This may vary a bit (the UHCI docs don't explicitly say you can put iso
- * transfers in QH's and all of their pictures don't have that either) but
- * other than that, that is what we're doing now
- *
- * And now we don't put Iso transfers in QH's, so we don't waste one on it
- * --jerdfelt
- *
- * To keep with Linus' nomenclature, this is called the QH skeleton. These
- * labels (below) are only signficant to the root hub's QH's
- */
-
-#define UHCI_NUM_SKELTD 10
-#define skel_int1_td skeltd[0]
-#define skel_int2_td skeltd[1]
-#define skel_int4_td skeltd[2]
-#define skel_int8_td skeltd[3]
-#define skel_int16_td skeltd[4]
-#define skel_int32_td skeltd[5]
-#define skel_int64_td skeltd[6]
-#define skel_int128_td skeltd[7]
-#define skel_int256_td skeltd[8]
-#define skel_term_td skeltd[9] /* To work around PIIX UHCI bug */
-
-#define UHCI_NUM_SKELQH 4
-#define skel_ls_control_qh skelqh[0]
-#define skel_hs_control_qh skelqh[1]
-#define skel_bulk_qh skelqh[2]
-#define skel_term_qh skelqh[3]
-
-/*
- * Search tree for determining where <interval> fits in the
- * skelqh[] skeleton.
- *
- * An interrupt request should be placed into the slowest skelqh[]
- * which meets the interval/period/frequency requirement.
- * An interrupt request is allowed to be faster than <interval> but not slower.
- *
- * For a given <interval>, this function returns the appropriate/matching
- * skelqh[] index value.
- *
- * NOTE: For UHCI, we don't really need int256_qh since the maximum interval
- * is 255 ms. However, we do need an int1_qh since 1 is a valid interval
- * and we should meet that frequency when requested to do so.
- * This will require some change(s) to the UHCI skeleton.
- */
-static inline int __interval_to_skel(int interval)
-{
- if (interval < 16) {
- if (interval < 4) {
- if (interval < 2)
- return 0; /* int1 for 0-1 ms */
- return 1; /* int2 for 2-3 ms */
- }
- if (interval < 8)
- return 2; /* int4 for 4-7 ms */
- return 3; /* int8 for 8-15 ms */
- }
- if (interval < 64) {
- if (interval < 32)
- return 4; /* int16 for 16-31 ms */
- return 5; /* int32 for 32-63 ms */
- }
- if (interval < 128)
- return 6; /* int64 for 64-127 ms */
- return 7; /* int128 for 128-255 ms (Max.) */
-}
-
-struct virt_root_hub {
- struct usb_device *dev;
- int devnum; /* Address of Root Hub endpoint */
- struct urb *urb;
- void *int_addr;
- int send;
- int interval;
- int numports;
- int c_p_r[8];
- struct timer_list rh_int_timer;
-};
-
-/*
- * This describes the full uhci information.
- *
- * Note how the "proper" USB information is just
- * a subset of what the full implementation needs.
- */
-struct uhci {
- struct pci_dev *dev;
-
-#ifdef CONFIG_PROC_FS
- /* procfs */
- int num;
- struct proc_dir_entry *proc_entry;
-#endif
-
- /* Grabbed from PCI */
- int irq;
- unsigned int io_addr;
- unsigned int io_size;
-
- struct pci_pool *qh_pool;
- struct pci_pool *td_pool;
-
- struct usb_bus *bus;
-
- struct uhci_td *skeltd[UHCI_NUM_SKELTD]; /* Skeleton TD's */
- struct uhci_qh *skelqh[UHCI_NUM_SKELQH]; /* Skeleton QH's */
-
- spinlock_t frame_list_lock;
- struct uhci_frame_list *fl; /* P: uhci->frame_list_lock */
- int fsbr; /* Full speed bandwidth reclamation */
- unsigned long fsbrtimeout; /* FSBR delay */
- int is_suspended;
-
- /* Main list of URB's currently controlled by this HC */
- spinlock_t urb_list_lock;
- struct list_head urb_list; /* P: uhci->urb_list_lock */
-
- /* List of QH's that are done, but waiting to be unlinked (race) */
- spinlock_t qh_remove_list_lock;
- struct list_head qh_remove_list; /* P: uhci->qh_remove_list_lock */
-
- /* List of asynchronously unlinked URB's */
- spinlock_t urb_remove_list_lock;
- struct list_head urb_remove_list; /* P: uhci->urb_remove_list_lock */
-
- /* List of URB's awaiting completion callback */
- spinlock_t complete_list_lock;
- struct list_head complete_list; /* P: uhci->complete_list_lock */
-
- struct virt_root_hub rh; /* private data of the virtual root hub */
-};
-
-struct urb_priv {
- struct urb *urb;
- struct usb_device *dev;
-
- dma_addr_t setup_packet_dma_handle;
- dma_addr_t transfer_buffer_dma_handle;
-
- struct uhci_qh *qh; /* QH for this URB */
- struct list_head td_list; /* P: urb->lock */
-
- int fsbr : 1; /* URB turned on FSBR */
- int fsbr_timeout : 1; /* URB timed out on FSBR */
- int queued : 1; /* QH was queued (not linked in) */
- int short_control_packet : 1; /* If we get a short packet during */
- /* a control transfer, retrigger */
- /* the status phase */
-
- int status; /* Final status */
-
- unsigned long inserttime; /* In jiffies */
- unsigned long fsbrtime; /* In jiffies */
-
- struct list_head queue_list; /* P: uhci->frame_list_lock */
- struct list_head complete_list; /* P: uhci->complete_list_lock */
-};
-
-/*
- * Locking in uhci.c
- *
- * spinlocks are used extensively to protect the many lists and data
- * structures we have. It's not that pretty, but it's necessary. We
- * need to be done with all of the locks (except complete_list_lock) when
- * we call urb->complete. I've tried to make it simple enough so I don't
- * have to spend hours racking my brain trying to figure out if the
- * locking is safe.
- *
- * Here's the safe locking order to prevent deadlocks:
- *
- * #1 uhci->urb_list_lock
- * #2 urb->lock
- * #3 uhci->urb_remove_list_lock, uhci->frame_list_lock,
- * uhci->qh_remove_list_lock
- * #4 uhci->complete_list_lock
- *
- * If you're going to grab 2 or more locks at once, ALWAYS grab the lock
- * at the lowest level FIRST and NEVER grab locks at the same level at the
- * same time.
- *
- * So, if you need uhci->urb_list_lock, grab it before you grab urb->lock
- */
-
-/* -------------------------------------------------------------------------
- Virtual Root HUB
- ------------------------------------------------------------------------- */
-/* destination of request */
-#define RH_DEVICE 0x00
-#define RH_INTERFACE 0x01
-#define RH_ENDPOINT 0x02
-#define RH_OTHER 0x03
-
-#define RH_CLASS 0x20
-#define RH_VENDOR 0x40
-
-/* Requests: bRequest << 8 | bmRequestType */
-#define RH_GET_STATUS 0x0080
-#define RH_CLEAR_FEATURE 0x0100
-#define RH_SET_FEATURE 0x0300
-#define RH_SET_ADDRESS 0x0500
-#define RH_GET_DESCRIPTOR 0x0680
-#define RH_SET_DESCRIPTOR 0x0700
-#define RH_GET_CONFIGURATION 0x0880
-#define RH_SET_CONFIGURATION 0x0900
-#define RH_GET_STATE 0x0280
-#define RH_GET_INTERFACE 0x0A80
-#define RH_SET_INTERFACE 0x0B00
-#define RH_SYNC_FRAME 0x0C80
-/* Our Vendor Specific Request */
-#define RH_SET_EP 0x2000
-
-/* Hub port features */
-#define RH_PORT_CONNECTION 0x00
-#define RH_PORT_ENABLE 0x01
-#define RH_PORT_SUSPEND 0x02
-#define RH_PORT_OVER_CURRENT 0x03
-#define RH_PORT_RESET 0x04
-#define RH_PORT_POWER 0x08
-#define RH_PORT_LOW_SPEED 0x09
-#define RH_C_PORT_CONNECTION 0x10
-#define RH_C_PORT_ENABLE 0x11
-#define RH_C_PORT_SUSPEND 0x12
-#define RH_C_PORT_OVER_CURRENT 0x13
-#define RH_C_PORT_RESET 0x14
-
-/* Hub features */
-#define RH_C_HUB_LOCAL_POWER 0x00
-#define RH_C_HUB_OVER_CURRENT 0x01
-#define RH_DEVICE_REMOTE_WAKEUP 0x00
-#define RH_ENDPOINT_STALL 0x01
-
-/* Our Vendor Specific feature */
-#define RH_REMOVE_EP 0x00
-
-#define RH_ACK 0x01
-#define RH_REQ_ERR -1
-#define RH_NACK 0x00
-
-#endif
-
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