diff options
Diffstat (limited to 'drivers/usb/host/xhci.h')
| -rw-r--r-- | drivers/usb/host/xhci.h | 63 |
1 files changed, 61 insertions, 2 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index a4d44aad069..59fae2e5ea5 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -32,6 +32,9 @@ /* xHCI PCI Configuration Registers */ #define XHCI_SBRN_OFFSET (0x60) +/* Max number of USB devices for any host controller - limit in section 6.1 */ +#define MAX_HC_SLOTS 256 + /* * xHCI register interface. * This corresponds to the eXtensible Host Controller Interface (xHCI) @@ -359,10 +362,35 @@ struct intr_reg { u32 erst_dequeue[2]; } __attribute__ ((packed)); +/* irq_pending bitmasks */ #define ER_IRQ_PENDING(p) ((p) & 0x1) -#define ER_IRQ_ENABLE(p) ((p) | 0x2) +/* bits 2:31 need to be preserved */ +#define ER_IRQ_CLEAR(p) ((p) & 0xfffffffe) +#define ER_IRQ_ENABLE(p) ((ER_IRQ_CLEAR(p)) | 0x2) +#define ER_IRQ_DISABLE(p) ((ER_IRQ_CLEAR(p)) & ~(0x2)) + +/* irq_control bitmasks */ +/* Minimum interval between interrupts (in 250ns intervals). The interval + * between interrupts will be longer if there are no events on the event ring. + * Default is 4000 (1 ms). + */ +#define ER_IRQ_INTERVAL_MASK (0xffff) +/* Counter used to count down the time to the next interrupt - HW use only */ +#define ER_IRQ_COUNTER_MASK (0xffff << 16) + +/* erst_size bitmasks */ /* Preserve bits 16:31 of erst_size */ -#define ERST_SIZE_MASK (0xffff<<16) +#define ERST_SIZE_MASK (0xffff << 16) + +/* erst_dequeue bitmasks */ +/* Dequeue ERST Segment Index (DESI) - Segment number (or alias) + * where the current dequeue pointer lies. This is an optional HW hint. + */ +#define ERST_DESI_MASK (0x7) +/* Event Handler Busy (EHB) - is the event ring scheduled to be serviced by + * a work queue (or delayed service routine)? + */ +#define ERST_EHB (1 << 3) /** * struct xhci_run_regs @@ -386,6 +414,8 @@ struct xhci_hcd { struct xhci_cap_regs __iomem *cap_regs; struct xhci_op_regs __iomem *op_regs; struct xhci_run_regs __iomem *run_regs; + /* Our HCD's current interrupter register set */ + struct intr_reg __iomem *ir_set; /* Cached register copies of read-only HC data */ __u32 hcs_params1; @@ -404,7 +434,13 @@ struct xhci_hcd { u8 isoc_threshold; int event_ring_max; int addr_64; + /* 4KB min, 128MB max */ int page_size; + /* Valid values are 12 to 20, inclusive */ + int page_shift; + /* only one MSI vector for now, but might need more later */ + int msix_count; + struct msix_entry *msix_entries; }; /* convert between an HCD pointer and the corresponding EHCI_HCD */ @@ -449,4 +485,27 @@ static inline void xhci_writel(const struct xhci_hcd *xhci, writel(val, regs); } +/* xHCI debugging */ +void xhci_print_ir_set(struct xhci_hcd *xhci, struct intr_reg *ir_set, int set_num); +void xhci_print_registers(struct xhci_hcd *xhci); + +/* xHCI memory managment */ +void xhci_mem_cleanup(struct xhci_hcd *xhci); +int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags); + +#ifdef CONFIG_PCI +/* xHCI PCI glue */ +int xhci_register_pci(void); +void xhci_unregister_pci(void); +#endif + +/* xHCI host controller glue */ +int xhci_halt(struct xhci_hcd *xhci); +int xhci_reset(struct xhci_hcd *xhci); +int xhci_init(struct usb_hcd *hcd); +int xhci_run(struct usb_hcd *hcd); +void xhci_stop(struct usb_hcd *hcd); +void xhci_shutdown(struct usb_hcd *hcd); +int xhci_get_frame(struct usb_hcd *hcd); + #endif /* __LINUX_XHCI_HCD_H */ |