860 lines
28 KiB
C
860 lines
28 KiB
C
/*
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* Copyright (c) 2001-2002 by David Brownell
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __LINUX_EHCI_HCD_H
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#define __LINUX_EHCI_HCD_H
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/* definitions used for the EHCI driver */
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/*
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* __hc32 and __hc16 are "Host Controller" types, they may be equivalent to
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* __leXX (normally) or __beXX (given EHCI_BIG_ENDIAN_DESC), depending on
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* the host controller implementation.
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*
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* To facilitate the strongest possible byte-order checking from "sparse"
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* and so on, we use __leXX unless that's not practical.
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*/
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#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
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typedef __u32 __bitwise __hc32;
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typedef __u16 __bitwise __hc16;
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#else
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#define __hc32 __le32
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#define __hc16 __le16
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#endif
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/* statistics can be kept for tuning/monitoring */
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#if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG)
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#define EHCI_STATS
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#endif
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struct ehci_stats {
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/* irq usage */
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unsigned long normal;
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unsigned long error;
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unsigned long iaa;
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unsigned long lost_iaa;
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/* termination of urbs from core */
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unsigned long complete;
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unsigned long unlink;
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};
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/*
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* Scheduling and budgeting information for periodic transfers, for both
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* high-speed devices and full/low-speed devices lying behind a TT.
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*/
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struct ehci_per_sched {
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struct usb_device *udev; /* access to the TT */
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struct usb_host_endpoint *ep;
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struct list_head ps_list; /* node on ehci_tt's ps_list */
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u16 tt_usecs; /* time on the FS/LS bus */
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u16 cs_mask; /* C-mask and S-mask bytes */
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u16 period; /* actual period in frames */
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u16 phase; /* actual phase, frame part */
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u8 bw_phase; /* same, for bandwidth
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reservation */
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u8 phase_uf; /* uframe part of the phase */
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u8 usecs, c_usecs; /* times on the HS bus */
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u8 bw_uperiod; /* period in microframes, for
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bandwidth reservation */
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u8 bw_period; /* same, in frames */
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};
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#define NO_FRAME 29999 /* frame not assigned yet */
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/* ehci_hcd->lock guards shared data against other CPUs:
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* ehci_hcd: async, unlink, periodic (and shadow), ...
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* usb_host_endpoint: hcpriv
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* ehci_qh: qh_next, qtd_list
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* ehci_qtd: qtd_list
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*
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* Also, hold this lock when talking to HC registers or
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* when updating hw_* fields in shared qh/qtd/... structures.
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*/
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#define EHCI_MAX_ROOT_PORTS 15 /* see HCS_N_PORTS */
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/*
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* ehci_rh_state values of EHCI_RH_RUNNING or above mean that the
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* controller may be doing DMA. Lower values mean there's no DMA.
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*/
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enum ehci_rh_state {
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EHCI_RH_HALTED,
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EHCI_RH_SUSPENDED,
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EHCI_RH_RUNNING,
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EHCI_RH_STOPPING
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};
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/*
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* Timer events, ordered by increasing delay length.
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* Always update event_delays_ns[] and event_handlers[] (defined in
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* ehci-timer.c) in parallel with this list.
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*/
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enum ehci_hrtimer_event {
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EHCI_HRTIMER_POLL_ASS, /* Poll for async schedule off */
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EHCI_HRTIMER_POLL_PSS, /* Poll for periodic schedule off */
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EHCI_HRTIMER_POLL_DEAD, /* Wait for dead controller to stop */
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EHCI_HRTIMER_UNLINK_INTR, /* Wait for interrupt QH unlink */
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EHCI_HRTIMER_FREE_ITDS, /* Wait for unused iTDs and siTDs */
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EHCI_HRTIMER_START_UNLINK_INTR, /* Unlink empty interrupt QHs */
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EHCI_HRTIMER_ASYNC_UNLINKS, /* Unlink empty async QHs */
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EHCI_HRTIMER_IAA_WATCHDOG, /* Handle lost IAA interrupts */
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EHCI_HRTIMER_DISABLE_PERIODIC, /* Wait to disable periodic sched */
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EHCI_HRTIMER_DISABLE_ASYNC, /* Wait to disable async sched */
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EHCI_HRTIMER_IO_WATCHDOG, /* Check for missing IRQs */
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EHCI_HRTIMER_NUM_EVENTS /* Must come last */
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};
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#define EHCI_HRTIMER_NO_EVENT 99
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struct ehci_hcd { /* one per controller */
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/* timing support */
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enum ehci_hrtimer_event next_hrtimer_event;
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unsigned enabled_hrtimer_events;
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ktime_t hr_timeouts[EHCI_HRTIMER_NUM_EVENTS];
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struct hrtimer hrtimer;
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int PSS_poll_count;
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int ASS_poll_count;
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int died_poll_count;
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/* glue to PCI and HCD framework */
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struct ehci_caps __iomem *caps;
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struct ehci_regs __iomem *regs;
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struct ehci_dbg_port __iomem *debug;
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__u32 hcs_params; /* cached register copy */
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spinlock_t lock;
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enum ehci_rh_state rh_state;
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/* general schedule support */
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bool scanning:1;
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bool need_rescan:1;
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bool intr_unlinking:1;
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bool iaa_in_progress:1;
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bool async_unlinking:1;
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bool shutdown:1;
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struct ehci_qh *qh_scan_next;
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/* async schedule support */
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struct ehci_qh *async;
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struct ehci_qh *dummy; /* For AMD quirk use */
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struct list_head async_unlink;
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struct list_head async_idle;
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unsigned async_unlink_cycle;
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unsigned async_count; /* async activity count */
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/* periodic schedule support */
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#define DEFAULT_I_TDPS 1024 /* some HCs can do less */
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unsigned periodic_size;
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__hc32 *periodic; /* hw periodic table */
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dma_addr_t periodic_dma;
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struct list_head intr_qh_list;
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unsigned i_thresh; /* uframes HC might cache */
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union ehci_shadow *pshadow; /* mirror hw periodic table */
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struct list_head intr_unlink_wait;
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struct list_head intr_unlink;
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unsigned intr_unlink_wait_cycle;
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unsigned intr_unlink_cycle;
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unsigned now_frame; /* frame from HC hardware */
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unsigned last_iso_frame; /* last frame scanned for iso */
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unsigned intr_count; /* intr activity count */
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unsigned isoc_count; /* isoc activity count */
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unsigned periodic_count; /* periodic activity count */
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unsigned uframe_periodic_max; /* max periodic time per uframe */
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/* list of itds & sitds completed while now_frame was still active */
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struct list_head cached_itd_list;
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struct ehci_itd *last_itd_to_free;
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struct list_head cached_sitd_list;
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struct ehci_sitd *last_sitd_to_free;
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/* per root hub port */
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unsigned long reset_done [EHCI_MAX_ROOT_PORTS];
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/* bit vectors (one bit per port) */
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unsigned long bus_suspended; /* which ports were
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already suspended at the start of a bus suspend */
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unsigned long companion_ports; /* which ports are
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dedicated to the companion controller */
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unsigned long owned_ports; /* which ports are
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owned by the companion during a bus suspend */
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unsigned long port_c_suspend; /* which ports have
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the change-suspend feature turned on */
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unsigned long suspended_ports; /* which ports are
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suspended */
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unsigned long resuming_ports; /* which ports have
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started to resume */
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/* per-HC memory pools (could be per-bus, but ...) */
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struct dma_pool *qh_pool; /* qh per active urb */
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struct dma_pool *qtd_pool; /* one or more per qh */
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struct dma_pool *itd_pool; /* itd per iso urb */
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struct dma_pool *sitd_pool; /* sitd per split iso urb */
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unsigned random_frame;
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unsigned long next_statechange;
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ktime_t last_periodic_enable;
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u32 command;
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/* SILICON QUIRKS */
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unsigned no_selective_suspend:1;
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unsigned has_fsl_port_bug:1; /* FreeScale */
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unsigned big_endian_mmio:1;
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unsigned big_endian_desc:1;
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unsigned big_endian_capbase:1;
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unsigned has_amcc_usb23:1;
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unsigned need_io_watchdog:1;
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unsigned amd_pll_fix:1;
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unsigned use_dummy_qh:1; /* AMD Frame List table quirk*/
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unsigned has_synopsys_hc_bug:1; /* Synopsys HC */
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unsigned frame_index_bug:1; /* MosChip (AKA NetMos) */
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unsigned need_oc_pp_cycle:1; /* MPC834X port power */
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/* required for usb32 quirk */
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#define OHCI_CTRL_HCFS (3 << 6)
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#define OHCI_USB_OPER (2 << 6)
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#define OHCI_USB_SUSPEND (3 << 6)
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#define OHCI_HCCTRL_OFFSET 0x4
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#define OHCI_HCCTRL_LEN 0x4
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__hc32 *ohci_hcctrl_reg;
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unsigned has_hostpc:1;
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unsigned has_tdi_phy_lpm:1;
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unsigned has_ppcd:1; /* support per-port change bits */
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u8 sbrn; /* packed release number */
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/* irq statistics */
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#ifdef EHCI_STATS
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struct ehci_stats stats;
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# define COUNT(x) do { (x)++; } while (0)
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#else
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# define COUNT(x) do {} while (0)
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#endif
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/* debug files */
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#if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG)
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struct dentry *debug_dir;
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#endif
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/* bandwidth usage */
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#define EHCI_BANDWIDTH_SIZE 64
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#define EHCI_BANDWIDTH_FRAMES (EHCI_BANDWIDTH_SIZE >> 3)
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u8 bandwidth[EHCI_BANDWIDTH_SIZE];
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/* us allocated per uframe */
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u8 tt_budget[EHCI_BANDWIDTH_SIZE];
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/* us budgeted per uframe */
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struct list_head tt_list;
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/* platform-specific data -- must come last */
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unsigned long priv[0] __aligned(sizeof(s64));
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};
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/* convert between an HCD pointer and the corresponding EHCI_HCD */
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static inline struct ehci_hcd *hcd_to_ehci (struct usb_hcd *hcd)
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{
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return (struct ehci_hcd *) (hcd->hcd_priv);
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}
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static inline struct usb_hcd *ehci_to_hcd (struct ehci_hcd *ehci)
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{
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return container_of ((void *) ehci, struct usb_hcd, hcd_priv);
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}
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/*-------------------------------------------------------------------------*/
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#include <linux/usb/ehci_def.h>
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/*-------------------------------------------------------------------------*/
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#define QTD_NEXT(ehci, dma) cpu_to_hc32(ehci, (u32)dma)
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/*
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* EHCI Specification 0.95 Section 3.5
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* QTD: describe data transfer components (buffer, direction, ...)
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* See Fig 3-6 "Queue Element Transfer Descriptor Block Diagram".
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*
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* These are associated only with "QH" (Queue Head) structures,
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* used with control, bulk, and interrupt transfers.
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*/
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struct ehci_qtd {
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/* first part defined by EHCI spec */
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__hc32 hw_next; /* see EHCI 3.5.1 */
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__hc32 hw_alt_next; /* see EHCI 3.5.2 */
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__hc32 hw_token; /* see EHCI 3.5.3 */
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#define QTD_TOGGLE (1 << 31) /* data toggle */
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#define QTD_LENGTH(tok) (((tok)>>16) & 0x7fff)
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#define QTD_IOC (1 << 15) /* interrupt on complete */
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#define QTD_CERR(tok) (((tok)>>10) & 0x3)
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#define QTD_PID(tok) (((tok)>>8) & 0x3)
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#define QTD_STS_ACTIVE (1 << 7) /* HC may execute this */
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#define QTD_STS_HALT (1 << 6) /* halted on error */
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#define QTD_STS_DBE (1 << 5) /* data buffer error (in HC) */
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#define QTD_STS_BABBLE (1 << 4) /* device was babbling (qtd halted) */
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#define QTD_STS_XACT (1 << 3) /* device gave illegal response */
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#define QTD_STS_MMF (1 << 2) /* incomplete split transaction */
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#define QTD_STS_STS (1 << 1) /* split transaction state */
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#define QTD_STS_PING (1 << 0) /* issue PING? */
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#define ACTIVE_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_ACTIVE)
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#define HALT_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_HALT)
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#define STATUS_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_STS)
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__hc32 hw_buf [5]; /* see EHCI 3.5.4 */
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__hc32 hw_buf_hi [5]; /* Appendix B */
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/* the rest is HCD-private */
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dma_addr_t qtd_dma; /* qtd address */
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struct list_head qtd_list; /* sw qtd list */
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struct urb *urb; /* qtd's urb */
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size_t length; /* length of buffer */
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} __attribute__ ((aligned (32)));
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/* mask NakCnt+T in qh->hw_alt_next */
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#define QTD_MASK(ehci) cpu_to_hc32 (ehci, ~0x1f)
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#define IS_SHORT_READ(token) (QTD_LENGTH (token) != 0 && QTD_PID (token) == 1)
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/*-------------------------------------------------------------------------*/
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/* type tag from {qh,itd,sitd,fstn}->hw_next */
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#define Q_NEXT_TYPE(ehci,dma) ((dma) & cpu_to_hc32(ehci, 3 << 1))
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/*
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* Now the following defines are not converted using the
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* cpu_to_le32() macro anymore, since we have to support
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* "dynamic" switching between be and le support, so that the driver
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* can be used on one system with SoC EHCI controller using big-endian
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* descriptors as well as a normal little-endian PCI EHCI controller.
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*/
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/* values for that type tag */
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#define Q_TYPE_ITD (0 << 1)
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#define Q_TYPE_QH (1 << 1)
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#define Q_TYPE_SITD (2 << 1)
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#define Q_TYPE_FSTN (3 << 1)
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/* next async queue entry, or pointer to interrupt/periodic QH */
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#define QH_NEXT(ehci,dma) (cpu_to_hc32(ehci, (((u32)dma)&~0x01f)|Q_TYPE_QH))
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/* for periodic/async schedules and qtd lists, mark end of list */
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#define EHCI_LIST_END(ehci) cpu_to_hc32(ehci, 1) /* "null pointer" to hw */
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/*
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* Entries in periodic shadow table are pointers to one of four kinds
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* of data structure. That's dictated by the hardware; a type tag is
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* encoded in the low bits of the hardware's periodic schedule. Use
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* Q_NEXT_TYPE to get the tag.
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*
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* For entries in the async schedule, the type tag always says "qh".
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*/
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union ehci_shadow {
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struct ehci_qh *qh; /* Q_TYPE_QH */
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struct ehci_itd *itd; /* Q_TYPE_ITD */
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struct ehci_sitd *sitd; /* Q_TYPE_SITD */
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struct ehci_fstn *fstn; /* Q_TYPE_FSTN */
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__hc32 *hw_next; /* (all types) */
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void *ptr;
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};
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/*-------------------------------------------------------------------------*/
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/*
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* EHCI Specification 0.95 Section 3.6
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* QH: describes control/bulk/interrupt endpoints
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* See Fig 3-7 "Queue Head Structure Layout".
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*
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* These appear in both the async and (for interrupt) periodic schedules.
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*/
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/* first part defined by EHCI spec */
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struct ehci_qh_hw {
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__hc32 hw_next; /* see EHCI 3.6.1 */
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__hc32 hw_info1; /* see EHCI 3.6.2 */
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#define QH_CONTROL_EP (1 << 27) /* FS/LS control endpoint */
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#define QH_HEAD (1 << 15) /* Head of async reclamation list */
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#define QH_TOGGLE_CTL (1 << 14) /* Data toggle control */
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#define QH_HIGH_SPEED (2 << 12) /* Endpoint speed */
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#define QH_LOW_SPEED (1 << 12)
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#define QH_FULL_SPEED (0 << 12)
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#define QH_INACTIVATE (1 << 7) /* Inactivate on next transaction */
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__hc32 hw_info2; /* see EHCI 3.6.2 */
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#define QH_SMASK 0x000000ff
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#define QH_CMASK 0x0000ff00
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#define QH_HUBADDR 0x007f0000
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#define QH_HUBPORT 0x3f800000
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#define QH_MULT 0xc0000000
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__hc32 hw_current; /* qtd list - see EHCI 3.6.4 */
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/* qtd overlay (hardware parts of a struct ehci_qtd) */
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__hc32 hw_qtd_next;
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__hc32 hw_alt_next;
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__hc32 hw_token;
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__hc32 hw_buf [5];
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__hc32 hw_buf_hi [5];
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} __attribute__ ((aligned(32)));
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struct ehci_qh {
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struct ehci_qh_hw *hw; /* Must come first */
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/* the rest is HCD-private */
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dma_addr_t qh_dma; /* address of qh */
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union ehci_shadow qh_next; /* ptr to qh; or periodic */
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struct list_head qtd_list; /* sw qtd list */
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struct list_head intr_node; /* list of intr QHs */
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struct ehci_qtd *dummy;
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struct list_head unlink_node;
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struct ehci_per_sched ps; /* scheduling info */
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unsigned unlink_cycle;
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u8 qh_state;
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#define QH_STATE_LINKED 1 /* HC sees this */
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#define QH_STATE_UNLINK 2 /* HC may still see this */
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#define QH_STATE_IDLE 3 /* HC doesn't see this */
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#define QH_STATE_UNLINK_WAIT 4 /* LINKED and on unlink q */
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#define QH_STATE_COMPLETING 5 /* don't touch token.HALT */
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u8 xacterrs; /* XactErr retry counter */
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#define QH_XACTERR_MAX 32 /* XactErr retry limit */
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u8 gap_uf; /* uframes split/csplit gap */
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unsigned is_out:1; /* bulk or intr OUT */
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unsigned clearing_tt:1; /* Clear-TT-Buf in progress */
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unsigned dequeue_during_giveback:1;
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unsigned exception:1; /* got a fault, or an unlink
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was requested */
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};
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/*-------------------------------------------------------------------------*/
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/* description of one iso transaction (up to 3 KB data if highspeed) */
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struct ehci_iso_packet {
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/* These will be copied to iTD when scheduling */
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u64 bufp; /* itd->hw_bufp{,_hi}[pg] |= */
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__hc32 transaction; /* itd->hw_transaction[i] |= */
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u8 cross; /* buf crosses pages */
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/* for full speed OUT splits */
|
|
u32 buf1;
|
|
};
|
|
|
|
/* temporary schedule data for packets from iso urbs (both speeds)
|
|
* each packet is one logical usb transaction to the device (not TT),
|
|
* beginning at stream->next_uframe
|
|
*/
|
|
struct ehci_iso_sched {
|
|
struct list_head td_list;
|
|
unsigned span;
|
|
unsigned first_packet;
|
|
struct ehci_iso_packet packet [0];
|
|
};
|
|
|
|
/*
|
|
* ehci_iso_stream - groups all (s)itds for this endpoint.
|
|
* acts like a qh would, if EHCI had them for ISO.
|
|
*/
|
|
struct ehci_iso_stream {
|
|
/* first field matches ehci_hq, but is NULL */
|
|
struct ehci_qh_hw *hw;
|
|
|
|
u8 bEndpointAddress;
|
|
u8 highspeed;
|
|
struct list_head td_list; /* queued itds/sitds */
|
|
struct list_head free_list; /* list of unused itds/sitds */
|
|
|
|
/* output of (re)scheduling */
|
|
struct ehci_per_sched ps; /* scheduling info */
|
|
unsigned next_uframe;
|
|
__hc32 splits;
|
|
|
|
/* the rest is derived from the endpoint descriptor,
|
|
* including the extra info for hw_bufp[0..2]
|
|
*/
|
|
u16 uperiod; /* period in uframes */
|
|
u16 maxp;
|
|
unsigned bandwidth;
|
|
|
|
/* This is used to initialize iTD's hw_bufp fields */
|
|
__hc32 buf0;
|
|
__hc32 buf1;
|
|
__hc32 buf2;
|
|
|
|
/* this is used to initialize sITD's tt info */
|
|
__hc32 address;
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* EHCI Specification 0.95 Section 3.3
|
|
* Fig 3-4 "Isochronous Transaction Descriptor (iTD)"
|
|
*
|
|
* Schedule records for high speed iso xfers
|
|
*/
|
|
struct ehci_itd {
|
|
/* first part defined by EHCI spec */
|
|
__hc32 hw_next; /* see EHCI 3.3.1 */
|
|
__hc32 hw_transaction [8]; /* see EHCI 3.3.2 */
|
|
#define EHCI_ISOC_ACTIVE (1<<31) /* activate transfer this slot */
|
|
#define EHCI_ISOC_BUF_ERR (1<<30) /* Data buffer error */
|
|
#define EHCI_ISOC_BABBLE (1<<29) /* babble detected */
|
|
#define EHCI_ISOC_XACTERR (1<<28) /* XactErr - transaction error */
|
|
#define EHCI_ITD_LENGTH(tok) (((tok)>>16) & 0x0fff)
|
|
#define EHCI_ITD_IOC (1 << 15) /* interrupt on complete */
|
|
|
|
#define ITD_ACTIVE(ehci) cpu_to_hc32(ehci, EHCI_ISOC_ACTIVE)
|
|
|
|
__hc32 hw_bufp [7]; /* see EHCI 3.3.3 */
|
|
__hc32 hw_bufp_hi [7]; /* Appendix B */
|
|
|
|
/* the rest is HCD-private */
|
|
dma_addr_t itd_dma; /* for this itd */
|
|
union ehci_shadow itd_next; /* ptr to periodic q entry */
|
|
|
|
struct urb *urb;
|
|
struct ehci_iso_stream *stream; /* endpoint's queue */
|
|
struct list_head itd_list; /* list of stream's itds */
|
|
|
|
/* any/all hw_transactions here may be used by that urb */
|
|
unsigned frame; /* where scheduled */
|
|
unsigned pg;
|
|
unsigned index[8]; /* in urb->iso_frame_desc */
|
|
} __attribute__ ((aligned (32)));
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* EHCI Specification 0.95 Section 3.4
|
|
* siTD, aka split-transaction isochronous Transfer Descriptor
|
|
* ... describe full speed iso xfers through TT in hubs
|
|
* see Figure 3-5 "Split-transaction Isochronous Transaction Descriptor (siTD)
|
|
*/
|
|
struct ehci_sitd {
|
|
/* first part defined by EHCI spec */
|
|
__hc32 hw_next;
|
|
/* uses bit field macros above - see EHCI 0.95 Table 3-8 */
|
|
__hc32 hw_fullspeed_ep; /* EHCI table 3-9 */
|
|
__hc32 hw_uframe; /* EHCI table 3-10 */
|
|
__hc32 hw_results; /* EHCI table 3-11 */
|
|
#define SITD_IOC (1 << 31) /* interrupt on completion */
|
|
#define SITD_PAGE (1 << 30) /* buffer 0/1 */
|
|
#define SITD_LENGTH(x) (0x3ff & ((x)>>16))
|
|
#define SITD_STS_ACTIVE (1 << 7) /* HC may execute this */
|
|
#define SITD_STS_ERR (1 << 6) /* error from TT */
|
|
#define SITD_STS_DBE (1 << 5) /* data buffer error (in HC) */
|
|
#define SITD_STS_BABBLE (1 << 4) /* device was babbling */
|
|
#define SITD_STS_XACT (1 << 3) /* illegal IN response */
|
|
#define SITD_STS_MMF (1 << 2) /* incomplete split transaction */
|
|
#define SITD_STS_STS (1 << 1) /* split transaction state */
|
|
|
|
#define SITD_ACTIVE(ehci) cpu_to_hc32(ehci, SITD_STS_ACTIVE)
|
|
|
|
__hc32 hw_buf [2]; /* EHCI table 3-12 */
|
|
__hc32 hw_backpointer; /* EHCI table 3-13 */
|
|
__hc32 hw_buf_hi [2]; /* Appendix B */
|
|
|
|
/* the rest is HCD-private */
|
|
dma_addr_t sitd_dma;
|
|
union ehci_shadow sitd_next; /* ptr to periodic q entry */
|
|
|
|
struct urb *urb;
|
|
struct ehci_iso_stream *stream; /* endpoint's queue */
|
|
struct list_head sitd_list; /* list of stream's sitds */
|
|
unsigned frame;
|
|
unsigned index;
|
|
} __attribute__ ((aligned (32)));
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* EHCI Specification 0.96 Section 3.7
|
|
* Periodic Frame Span Traversal Node (FSTN)
|
|
*
|
|
* Manages split interrupt transactions (using TT) that span frame boundaries
|
|
* into uframes 0/1; see 4.12.2.2. In those uframes, a "save place" FSTN
|
|
* makes the HC jump (back) to a QH to scan for fs/ls QH completions until
|
|
* it hits a "restore" FSTN; then it returns to finish other uframe 0/1 work.
|
|
*/
|
|
struct ehci_fstn {
|
|
__hc32 hw_next; /* any periodic q entry */
|
|
__hc32 hw_prev; /* qh or EHCI_LIST_END */
|
|
|
|
/* the rest is HCD-private */
|
|
dma_addr_t fstn_dma;
|
|
union ehci_shadow fstn_next; /* ptr to periodic q entry */
|
|
} __attribute__ ((aligned (32)));
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* USB-2.0 Specification Sections 11.14 and 11.18
|
|
* Scheduling and budgeting split transactions using TTs
|
|
*
|
|
* A hub can have a single TT for all its ports, or multiple TTs (one for each
|
|
* port). The bandwidth and budgeting information for the full/low-speed bus
|
|
* below each TT is self-contained and independent of the other TTs or the
|
|
* high-speed bus.
|
|
*
|
|
* "Bandwidth" refers to the number of microseconds on the FS/LS bus allocated
|
|
* to an interrupt or isochronous endpoint for each frame. "Budget" refers to
|
|
* the best-case estimate of the number of full-speed bytes allocated to an
|
|
* endpoint for each microframe within an allocated frame.
|
|
*
|
|
* Removal of an endpoint invalidates a TT's budget. Instead of trying to
|
|
* keep an up-to-date record, we recompute the budget when it is needed.
|
|
*/
|
|
|
|
struct ehci_tt {
|
|
u16 bandwidth[EHCI_BANDWIDTH_FRAMES];
|
|
|
|
struct list_head tt_list; /* List of all ehci_tt's */
|
|
struct list_head ps_list; /* Items using this TT */
|
|
struct usb_tt *usb_tt;
|
|
int tt_port; /* TT port number */
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* Prepare the PORTSC wakeup flags during controller suspend/resume */
|
|
|
|
#define ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup) \
|
|
ehci_adjust_port_wakeup_flags(ehci, true, do_wakeup);
|
|
|
|
#define ehci_prepare_ports_for_controller_resume(ehci) \
|
|
ehci_adjust_port_wakeup_flags(ehci, false, false);
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#ifdef CONFIG_USB_EHCI_ROOT_HUB_TT
|
|
|
|
/*
|
|
* Some EHCI controllers have a Transaction Translator built into the
|
|
* root hub. This is a non-standard feature. Each controller will need
|
|
* to add code to the following inline functions, and call them as
|
|
* needed (mostly in root hub code).
|
|
*/
|
|
|
|
#define ehci_is_TDI(e) (ehci_to_hcd(e)->has_tt)
|
|
|
|
/* Returns the speed of a device attached to a port on the root hub. */
|
|
static inline unsigned int
|
|
ehci_port_speed(struct ehci_hcd *ehci, unsigned int portsc)
|
|
{
|
|
if (ehci_is_TDI(ehci)) {
|
|
switch ((portsc >> (ehci->has_hostpc ? 25 : 26)) & 3) {
|
|
case 0:
|
|
return 0;
|
|
case 1:
|
|
return USB_PORT_STAT_LOW_SPEED;
|
|
case 2:
|
|
default:
|
|
return USB_PORT_STAT_HIGH_SPEED;
|
|
}
|
|
}
|
|
return USB_PORT_STAT_HIGH_SPEED;
|
|
}
|
|
|
|
#else
|
|
|
|
#define ehci_is_TDI(e) (0)
|
|
|
|
#define ehci_port_speed(ehci, portsc) USB_PORT_STAT_HIGH_SPEED
|
|
#endif
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#ifdef CONFIG_PPC_83xx
|
|
/* Some Freescale processors have an erratum in which the TT
|
|
* port number in the queue head was 0..N-1 instead of 1..N.
|
|
*/
|
|
#define ehci_has_fsl_portno_bug(e) ((e)->has_fsl_port_bug)
|
|
#else
|
|
#define ehci_has_fsl_portno_bug(e) (0)
|
|
#endif
|
|
|
|
/*
|
|
* While most USB host controllers implement their registers in
|
|
* little-endian format, a minority (celleb companion chip) implement
|
|
* them in big endian format.
|
|
*
|
|
* This attempts to support either format at compile time without a
|
|
* runtime penalty, or both formats with the additional overhead
|
|
* of checking a flag bit.
|
|
*
|
|
* ehci_big_endian_capbase is a special quirk for controllers that
|
|
* implement the HC capability registers as separate registers and not
|
|
* as fields of a 32-bit register.
|
|
*/
|
|
|
|
#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
|
|
#define ehci_big_endian_mmio(e) ((e)->big_endian_mmio)
|
|
#define ehci_big_endian_capbase(e) ((e)->big_endian_capbase)
|
|
#else
|
|
#define ehci_big_endian_mmio(e) 0
|
|
#define ehci_big_endian_capbase(e) 0
|
|
#endif
|
|
|
|
/*
|
|
* Big-endian read/write functions are arch-specific.
|
|
* Other arches can be added if/when they're needed.
|
|
*/
|
|
#if defined(CONFIG_ARM) && defined(CONFIG_ARCH_IXP4XX)
|
|
#define readl_be(addr) __raw_readl((__force unsigned *)addr)
|
|
#define writel_be(val, addr) __raw_writel(val, (__force unsigned *)addr)
|
|
#endif
|
|
|
|
static inline unsigned int ehci_readl(const struct ehci_hcd *ehci,
|
|
__u32 __iomem * regs)
|
|
{
|
|
#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
|
|
return ehci_big_endian_mmio(ehci) ?
|
|
readl_be(regs) :
|
|
readl(regs);
|
|
#else
|
|
return readl(regs);
|
|
#endif
|
|
}
|
|
|
|
static inline void ehci_writel(const struct ehci_hcd *ehci,
|
|
const unsigned int val, __u32 __iomem *regs)
|
|
{
|
|
#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
|
|
ehci_big_endian_mmio(ehci) ?
|
|
writel_be(val, regs) :
|
|
writel(val, regs);
|
|
#else
|
|
writel(val, regs);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* On certain ppc-44x SoC there is a HW issue, that could only worked around with
|
|
* explicit suspend/operate of OHCI. This function hereby makes sense only on that arch.
|
|
* Other common bits are dependent on has_amcc_usb23 quirk flag.
|
|
*/
|
|
#ifdef CONFIG_44x
|
|
static inline void set_ohci_hcfs(struct ehci_hcd *ehci, int operational)
|
|
{
|
|
u32 hc_control;
|
|
|
|
hc_control = (readl_be(ehci->ohci_hcctrl_reg) & ~OHCI_CTRL_HCFS);
|
|
if (operational)
|
|
hc_control |= OHCI_USB_OPER;
|
|
else
|
|
hc_control |= OHCI_USB_SUSPEND;
|
|
|
|
writel_be(hc_control, ehci->ohci_hcctrl_reg);
|
|
(void) readl_be(ehci->ohci_hcctrl_reg);
|
|
}
|
|
#else
|
|
static inline void set_ohci_hcfs(struct ehci_hcd *ehci, int operational)
|
|
{ }
|
|
#endif
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* The AMCC 440EPx not only implements its EHCI registers in big-endian
|
|
* format, but also its DMA data structures (descriptors).
|
|
*
|
|
* EHCI controllers accessed through PCI work normally (little-endian
|
|
* everywhere), so we won't bother supporting a BE-only mode for now.
|
|
*/
|
|
#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
|
|
#define ehci_big_endian_desc(e) ((e)->big_endian_desc)
|
|
|
|
/* cpu to ehci */
|
|
static inline __hc32 cpu_to_hc32 (const struct ehci_hcd *ehci, const u32 x)
|
|
{
|
|
return ehci_big_endian_desc(ehci)
|
|
? (__force __hc32)cpu_to_be32(x)
|
|
: (__force __hc32)cpu_to_le32(x);
|
|
}
|
|
|
|
/* ehci to cpu */
|
|
static inline u32 hc32_to_cpu (const struct ehci_hcd *ehci, const __hc32 x)
|
|
{
|
|
return ehci_big_endian_desc(ehci)
|
|
? be32_to_cpu((__force __be32)x)
|
|
: le32_to_cpu((__force __le32)x);
|
|
}
|
|
|
|
static inline u32 hc32_to_cpup (const struct ehci_hcd *ehci, const __hc32 *x)
|
|
{
|
|
return ehci_big_endian_desc(ehci)
|
|
? be32_to_cpup((__force __be32 *)x)
|
|
: le32_to_cpup((__force __le32 *)x);
|
|
}
|
|
|
|
#else
|
|
|
|
/* cpu to ehci */
|
|
static inline __hc32 cpu_to_hc32 (const struct ehci_hcd *ehci, const u32 x)
|
|
{
|
|
return cpu_to_le32(x);
|
|
}
|
|
|
|
/* ehci to cpu */
|
|
static inline u32 hc32_to_cpu (const struct ehci_hcd *ehci, const __hc32 x)
|
|
{
|
|
return le32_to_cpu(x);
|
|
}
|
|
|
|
static inline u32 hc32_to_cpup (const struct ehci_hcd *ehci, const __hc32 *x)
|
|
{
|
|
return le32_to_cpup(x);
|
|
}
|
|
|
|
#endif
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#define ehci_dbg(ehci, fmt, args...) \
|
|
dev_dbg(ehci_to_hcd(ehci)->self.controller , fmt , ## args)
|
|
#define ehci_err(ehci, fmt, args...) \
|
|
dev_err(ehci_to_hcd(ehci)->self.controller , fmt , ## args)
|
|
#define ehci_info(ehci, fmt, args...) \
|
|
dev_info(ehci_to_hcd(ehci)->self.controller , fmt , ## args)
|
|
#define ehci_warn(ehci, fmt, args...) \
|
|
dev_warn(ehci_to_hcd(ehci)->self.controller , fmt , ## args)
|
|
|
|
|
|
#if !defined(DEBUG) && !defined(CONFIG_DYNAMIC_DEBUG)
|
|
#define STUB_DEBUG_FILES
|
|
#endif /* !DEBUG && !CONFIG_DYNAMIC_DEBUG */
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* Declarations of things exported for use by ehci platform drivers */
|
|
|
|
struct ehci_driver_overrides {
|
|
size_t extra_priv_size;
|
|
int (*reset)(struct usb_hcd *hcd);
|
|
};
|
|
|
|
extern void ehci_init_driver(struct hc_driver *drv,
|
|
const struct ehci_driver_overrides *over);
|
|
extern int ehci_setup(struct usb_hcd *hcd);
|
|
extern int ehci_handshake(struct ehci_hcd *ehci, void __iomem *ptr,
|
|
u32 mask, u32 done, int usec);
|
|
|
|
#ifdef CONFIG_PM
|
|
extern int ehci_suspend(struct usb_hcd *hcd, bool do_wakeup);
|
|
extern int ehci_resume(struct usb_hcd *hcd, bool hibernated);
|
|
#endif /* CONFIG_PM */
|
|
|
|
#endif /* __LINUX_EHCI_HCD_H */
|