847 lines
27 KiB
C
847 lines
27 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 for tuning/monitoring */
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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 reclaim;
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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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/* ehci_hcd->lock guards shared data against other CPUs:
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* ehci_hcd: async, reclaim, 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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struct ehci_hcd { /* one per controller */
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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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/* async schedule support */
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struct ehci_qh *async;
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struct ehci_qh *reclaim;
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unsigned scanning : 1;
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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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unsigned i_thresh; /* uframes HC might cache */
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union ehci_shadow *pshadow; /* mirror hw periodic table */
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int next_uframe; /* scan periodic, start here */
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unsigned periodic_sched; /* periodic activity count */
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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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/* 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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struct timer_list iaa_watchdog;
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struct timer_list watchdog;
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unsigned long actions;
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unsigned stamp;
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unsigned long next_statechange;
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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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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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#ifdef DEBUG
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struct dentry *debug_dir;
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struct dentry *debug_async;
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struct dentry *debug_periodic;
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struct dentry *debug_registers;
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#endif
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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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static inline void
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iaa_watchdog_start(struct ehci_hcd *ehci)
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{
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WARN_ON(timer_pending(&ehci->iaa_watchdog));
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mod_timer(&ehci->iaa_watchdog,
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jiffies + msecs_to_jiffies(EHCI_IAA_MSECS));
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}
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static inline void iaa_watchdog_done(struct ehci_hcd *ehci)
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{
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del_timer(&ehci->iaa_watchdog);
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}
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enum ehci_timer_action {
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TIMER_IO_WATCHDOG,
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TIMER_ASYNC_SHRINK,
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TIMER_ASYNC_OFF,
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};
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static inline void
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timer_action_done (struct ehci_hcd *ehci, enum ehci_timer_action action)
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{
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clear_bit (action, &ehci->actions);
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}
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static inline void
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timer_action (struct ehci_hcd *ehci, enum ehci_timer_action action)
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{
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/* Don't override timeouts which shrink or (later) disable
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* the async ring; just the I/O watchdog. Note that if a
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* SHRINK were pending, OFF would never be requested.
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*/
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if (timer_pending(&ehci->watchdog)
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&& ((BIT(TIMER_ASYNC_SHRINK) | BIT(TIMER_ASYNC_OFF))
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& ehci->actions))
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return;
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if (!test_and_set_bit (action, &ehci->actions)) {
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unsigned long t;
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switch (action) {
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case TIMER_IO_WATCHDOG:
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t = EHCI_IO_JIFFIES;
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break;
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case TIMER_ASYNC_OFF:
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t = EHCI_ASYNC_JIFFIES;
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break;
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// case TIMER_ASYNC_SHRINK:
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default:
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/* add a jiffie since we synch against the
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* 8 KHz uframe counter.
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*/
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t = DIV_ROUND_UP(EHCI_SHRINK_FRAMES * HZ, 1000) + 1;
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break;
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}
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mod_timer(&ehci->watchdog, t + jiffies);
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}
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}
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/*-------------------------------------------------------------------------*/
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/* EHCI register interface, corresponds to EHCI Revision 0.95 specification */
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/* Section 2.2 Host Controller Capability Registers */
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struct ehci_caps {
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/* these fields are specified as 8 and 16 bit registers,
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* but some hosts can't perform 8 or 16 bit PCI accesses.
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*/
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u32 hc_capbase;
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#define HC_LENGTH(p) (((p)>>00)&0x00ff) /* bits 7:0 */
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#define HC_VERSION(p) (((p)>>16)&0xffff) /* bits 31:16 */
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u32 hcs_params; /* HCSPARAMS - offset 0x4 */
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#define HCS_DEBUG_PORT(p) (((p)>>20)&0xf) /* bits 23:20, debug port? */
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#define HCS_INDICATOR(p) ((p)&(1 << 16)) /* true: has port indicators */
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#define HCS_N_CC(p) (((p)>>12)&0xf) /* bits 15:12, #companion HCs */
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#define HCS_N_PCC(p) (((p)>>8)&0xf) /* bits 11:8, ports per CC */
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#define HCS_PORTROUTED(p) ((p)&(1 << 7)) /* true: port routing */
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#define HCS_PPC(p) ((p)&(1 << 4)) /* true: port power control */
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#define HCS_N_PORTS(p) (((p)>>0)&0xf) /* bits 3:0, ports on HC */
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u32 hcc_params; /* HCCPARAMS - offset 0x8 */
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#define HCC_EXT_CAPS(p) (((p)>>8)&0xff) /* for pci extended caps */
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#define HCC_ISOC_CACHE(p) ((p)&(1 << 7)) /* true: can cache isoc frame */
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#define HCC_ISOC_THRES(p) (((p)>>4)&0x7) /* bits 6:4, uframes cached */
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#define HCC_CANPARK(p) ((p)&(1 << 2)) /* true: can park on async qh */
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#define HCC_PGM_FRAMELISTLEN(p) ((p)&(1 << 1)) /* true: periodic_size changes*/
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#define HCC_64BIT_ADDR(p) ((p)&(1)) /* true: can use 64-bit addr */
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u8 portroute [8]; /* nibbles for routing - offset 0xC */
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} __attribute__ ((packed));
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/* Section 2.3 Host Controller Operational Registers */
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struct ehci_regs {
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/* USBCMD: offset 0x00 */
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u32 command;
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/* 23:16 is r/w intr rate, in microframes; default "8" == 1/msec */
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#define CMD_PARK (1<<11) /* enable "park" on async qh */
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#define CMD_PARK_CNT(c) (((c)>>8)&3) /* how many transfers to park for */
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#define CMD_LRESET (1<<7) /* partial reset (no ports, etc) */
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#define CMD_IAAD (1<<6) /* "doorbell" interrupt async advance */
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#define CMD_ASE (1<<5) /* async schedule enable */
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#define CMD_PSE (1<<4) /* periodic schedule enable */
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/* 3:2 is periodic frame list size */
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#define CMD_RESET (1<<1) /* reset HC not bus */
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#define CMD_RUN (1<<0) /* start/stop HC */
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/* USBSTS: offset 0x04 */
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u32 status;
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#define STS_ASS (1<<15) /* Async Schedule Status */
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#define STS_PSS (1<<14) /* Periodic Schedule Status */
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#define STS_RECL (1<<13) /* Reclamation */
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#define STS_HALT (1<<12) /* Not running (any reason) */
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/* some bits reserved */
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/* these STS_* flags are also intr_enable bits (USBINTR) */
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#define STS_IAA (1<<5) /* Interrupted on async advance */
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#define STS_FATAL (1<<4) /* such as some PCI access errors */
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#define STS_FLR (1<<3) /* frame list rolled over */
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#define STS_PCD (1<<2) /* port change detect */
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#define STS_ERR (1<<1) /* "error" completion (overflow, ...) */
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#define STS_INT (1<<0) /* "normal" completion (short, ...) */
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/* USBINTR: offset 0x08 */
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u32 intr_enable;
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/* FRINDEX: offset 0x0C */
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u32 frame_index; /* current microframe number */
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/* CTRLDSSEGMENT: offset 0x10 */
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u32 segment; /* address bits 63:32 if needed */
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/* PERIODICLISTBASE: offset 0x14 */
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u32 frame_list; /* points to periodic list */
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/* ASYNCLISTADDR: offset 0x18 */
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u32 async_next; /* address of next async queue head */
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u32 reserved [9];
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/* CONFIGFLAG: offset 0x40 */
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u32 configured_flag;
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#define FLAG_CF (1<<0) /* true: we'll support "high speed" */
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/* PORTSC: offset 0x44 */
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u32 port_status [0]; /* up to N_PORTS */
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/* 31:23 reserved */
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#define PORT_WKOC_E (1<<22) /* wake on overcurrent (enable) */
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#define PORT_WKDISC_E (1<<21) /* wake on disconnect (enable) */
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#define PORT_WKCONN_E (1<<20) /* wake on connect (enable) */
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/* 19:16 for port testing */
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#define PORT_LED_OFF (0<<14)
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#define PORT_LED_AMBER (1<<14)
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#define PORT_LED_GREEN (2<<14)
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#define PORT_LED_MASK (3<<14)
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#define PORT_OWNER (1<<13) /* true: companion hc owns this port */
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#define PORT_POWER (1<<12) /* true: has power (see PPC) */
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#define PORT_USB11(x) (((x)&(3<<10))==(1<<10)) /* USB 1.1 device */
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/* 11:10 for detecting lowspeed devices (reset vs release ownership) */
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/* 9 reserved */
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#define PORT_RESET (1<<8) /* reset port */
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#define PORT_SUSPEND (1<<7) /* suspend port */
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#define PORT_RESUME (1<<6) /* resume it */
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#define PORT_OCC (1<<5) /* over current change */
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#define PORT_OC (1<<4) /* over current active */
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#define PORT_PEC (1<<3) /* port enable change */
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#define PORT_PE (1<<2) /* port enable */
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#define PORT_CSC (1<<1) /* connect status change */
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#define PORT_CONNECT (1<<0) /* device connected */
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#define PORT_RWC_BITS (PORT_CSC | PORT_PEC | PORT_OCC)
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} __attribute__ ((packed));
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#define USBMODE 0x68 /* USB Device mode */
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#define USBMODE_SDIS (1<<3) /* Stream disable */
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#define USBMODE_BE (1<<2) /* BE/LE endianness select */
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#define USBMODE_CM_HC (3<<0) /* host controller mode */
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#define USBMODE_CM_IDLE (0<<0) /* idle state */
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/* Appendix C, Debug port ... intended for use with special "debug devices"
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* that can help if there's no serial console. (nonstandard enumeration.)
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*/
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struct ehci_dbg_port {
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u32 control;
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#define DBGP_OWNER (1<<30)
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#define DBGP_ENABLED (1<<28)
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#define DBGP_DONE (1<<16)
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#define DBGP_INUSE (1<<10)
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#define DBGP_ERRCODE(x) (((x)>>7)&0x07)
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# define DBGP_ERR_BAD 1
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# define DBGP_ERR_SIGNAL 2
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#define DBGP_ERROR (1<<6)
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#define DBGP_GO (1<<5)
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#define DBGP_OUT (1<<4)
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#define DBGP_LEN(x) (((x)>>0)&0x0f)
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u32 pids;
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#define DBGP_PID_GET(x) (((x)>>16)&0xff)
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#define DBGP_PID_SET(data,tok) (((data)<<8)|(tok))
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u32 data03;
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u32 data47;
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u32 address;
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#define DBGP_EPADDR(dev,ep) (((dev)<<8)|(ep))
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} __attribute__ ((packed));
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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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* __constant_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 */
|
|
__hc32 *hw_next; /* (all types) */
|
|
void *ptr;
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* EHCI Specification 0.95 Section 3.6
|
|
* QH: describes control/bulk/interrupt endpoints
|
|
* See Fig 3-7 "Queue Head Structure Layout".
|
|
*
|
|
* These appear in both the async and (for interrupt) periodic schedules.
|
|
*/
|
|
|
|
struct ehci_qh {
|
|
/* first part defined by EHCI spec */
|
|
__hc32 hw_next; /* see EHCI 3.6.1 */
|
|
__hc32 hw_info1; /* see EHCI 3.6.2 */
|
|
#define QH_HEAD 0x00008000
|
|
__hc32 hw_info2; /* see EHCI 3.6.2 */
|
|
#define QH_SMASK 0x000000ff
|
|
#define QH_CMASK 0x0000ff00
|
|
#define QH_HUBADDR 0x007f0000
|
|
#define QH_HUBPORT 0x3f800000
|
|
#define QH_MULT 0xc0000000
|
|
__hc32 hw_current; /* qtd list - see EHCI 3.6.4 */
|
|
|
|
/* qtd overlay (hardware parts of a struct ehci_qtd) */
|
|
__hc32 hw_qtd_next;
|
|
__hc32 hw_alt_next;
|
|
__hc32 hw_token;
|
|
__hc32 hw_buf [5];
|
|
__hc32 hw_buf_hi [5];
|
|
|
|
/* the rest is HCD-private */
|
|
dma_addr_t qh_dma; /* address of qh */
|
|
union ehci_shadow qh_next; /* ptr to qh; or periodic */
|
|
struct list_head qtd_list; /* sw qtd list */
|
|
struct ehci_qtd *dummy;
|
|
struct ehci_qh *reclaim; /* next to reclaim */
|
|
|
|
struct ehci_hcd *ehci;
|
|
|
|
/*
|
|
* Do NOT use atomic operations for QH refcounting. On some CPUs
|
|
* (PPC7448 for example), atomic operations cannot be performed on
|
|
* memory that is cache-inhibited (i.e. being used for DMA).
|
|
* Spinlocks are used to protect all QH fields.
|
|
*/
|
|
u32 refcount;
|
|
unsigned stamp;
|
|
|
|
u8 qh_state;
|
|
#define QH_STATE_LINKED 1 /* HC sees this */
|
|
#define QH_STATE_UNLINK 2 /* HC may still see this */
|
|
#define QH_STATE_IDLE 3 /* HC doesn't see this */
|
|
#define QH_STATE_UNLINK_WAIT 4 /* LINKED and on reclaim q */
|
|
#define QH_STATE_COMPLETING 5 /* don't touch token.HALT */
|
|
|
|
/* periodic schedule info */
|
|
u8 usecs; /* intr bandwidth */
|
|
u8 gap_uf; /* uframes split/csplit gap */
|
|
u8 c_usecs; /* ... split completion bw */
|
|
u16 tt_usecs; /* tt downstream bandwidth */
|
|
unsigned short period; /* polling interval */
|
|
unsigned short start; /* where polling starts */
|
|
#define NO_FRAME ((unsigned short)~0) /* pick new start */
|
|
struct usb_device *dev; /* access to TT */
|
|
} __attribute__ ((aligned (32)));
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* description of one iso transaction (up to 3 KB data if highspeed) */
|
|
struct ehci_iso_packet {
|
|
/* These will be copied to iTD when scheduling */
|
|
u64 bufp; /* itd->hw_bufp{,_hi}[pg] |= */
|
|
__hc32 transaction; /* itd->hw_transaction[i] |= */
|
|
u8 cross; /* buf crosses pages */
|
|
/* 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;
|
|
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 two fields match QH, but info1 == 0 */
|
|
__hc32 hw_next;
|
|
__hc32 hw_info1;
|
|
|
|
u32 refcount;
|
|
u8 bEndpointAddress;
|
|
u8 highspeed;
|
|
u16 depth; /* depth in uframes */
|
|
struct list_head td_list; /* queued itds/sitds */
|
|
struct list_head free_list; /* list of unused itds/sitds */
|
|
struct usb_device *udev;
|
|
struct usb_host_endpoint *ep;
|
|
|
|
/* output of (re)scheduling */
|
|
unsigned long start; /* jiffies */
|
|
unsigned long rescheduled;
|
|
int next_uframe;
|
|
__hc32 splits;
|
|
|
|
/* the rest is derived from the endpoint descriptor,
|
|
* trusting urb->interval == f(epdesc->bInterval) and
|
|
* including the extra info for hw_bufp[0..2]
|
|
*/
|
|
u8 usecs, c_usecs;
|
|
u16 interval;
|
|
u16 tt_usecs;
|
|
u16 maxp;
|
|
u16 raw_mask;
|
|
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)));
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#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>>26)&3) {
|
|
case 0:
|
|
return 0;
|
|
case 1:
|
|
return (1<<USB_PORT_FEAT_LOWSPEED);
|
|
case 2:
|
|
default:
|
|
return (1<<USB_PORT_FEAT_HIGHSPEED);
|
|
}
|
|
}
|
|
return (1<<USB_PORT_FEAT_HIGHSPEED);
|
|
}
|
|
|
|
#else
|
|
|
|
#define ehci_is_TDI(e) (0)
|
|
|
|
#define ehci_port_speed(ehci, portsc) (1<<USB_PORT_FEAT_HIGHSPEED)
|
|
#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.
|
|
*/
|
|
|
|
#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
|
|
#define ehci_big_endian_mmio(e) ((e)->big_endian_mmio)
|
|
#else
|
|
#define ehci_big_endian_mmio(e) 0
|
|
#endif
|
|
|
|
/*
|
|
* Big-endian read/write functions are arch-specific.
|
|
* Other arches can be added if/when they're needed.
|
|
*
|
|
* REVISIT: arch/powerpc now has readl/writel_be, so the
|
|
* definition below can die once the 4xx support is
|
|
* finally ported over.
|
|
*/
|
|
#if defined(CONFIG_PPC) && !defined(CONFIG_PPC_MERGE)
|
|
#define readl_be(addr) in_be32((__force unsigned *)addr)
|
|
#define writel_be(val, addr) out_be32((__force unsigned *)addr, val)
|
|
#endif
|
|
|
|
#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
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* 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
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#ifndef DEBUG
|
|
#define STUB_DEBUG_FILES
|
|
#endif /* DEBUG */
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#endif /* __LINUX_EHCI_HCD_H */
|