| /* |
| * Copyright (c) 2001-2002 by David Brownell |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software Foundation, |
| * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #ifndef __LINUX_EHCI_HCD_H |
| #define __LINUX_EHCI_HCD_H |
| |
| /* definitions used for the EHCI driver */ |
| |
| /* |
| * __hc32 and __hc16 are "Host Controller" types, they may be equivalent to |
| * __leXX (normally) or __beXX (given EHCI_BIG_ENDIAN_DESC), depending on |
| * the host controller implementation. |
| * |
| * To facilitate the strongest possible byte-order checking from "sparse" |
| * and so on, we use __leXX unless that's not practical. |
| */ |
| #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_DESC |
| typedef __u32 __bitwise __hc32; |
| typedef __u16 __bitwise __hc16; |
| #else |
| #define __hc32 __le32 |
| #define __hc16 __le16 |
| #endif |
| |
| /* statistics can be kept for for tuning/monitoring */ |
| struct ehci_stats { |
| /* irq usage */ |
| unsigned long normal; |
| unsigned long error; |
| unsigned long reclaim; |
| unsigned long lost_iaa; |
| |
| /* termination of urbs from core */ |
| unsigned long complete; |
| unsigned long unlink; |
| }; |
| |
| /* ehci_hcd->lock guards shared data against other CPUs: |
| * ehci_hcd: async, reclaim, periodic (and shadow), ... |
| * usb_host_endpoint: hcpriv |
| * ehci_qh: qh_next, qtd_list |
| * ehci_qtd: qtd_list |
| * |
| * Also, hold this lock when talking to HC registers or |
| * when updating hw_* fields in shared qh/qtd/... structures. |
| */ |
| |
| #define EHCI_MAX_ROOT_PORTS 15 /* see HCS_N_PORTS */ |
| |
| struct ehci_hcd { /* one per controller */ |
| /* glue to PCI and HCD framework */ |
| struct ehci_caps __iomem *caps; |
| struct ehci_regs __iomem *regs; |
| struct ehci_dbg_port __iomem *debug; |
| |
| __u32 hcs_params; /* cached register copy */ |
| spinlock_t lock; |
| |
| /* async schedule support */ |
| struct ehci_qh *async; |
| struct ehci_qh *reclaim; |
| unsigned scanning : 1; |
| |
| /* periodic schedule support */ |
| #define DEFAULT_I_TDPS 1024 /* some HCs can do less */ |
| unsigned periodic_size; |
| __hc32 *periodic; /* hw periodic table */ |
| dma_addr_t periodic_dma; |
| unsigned i_thresh; /* uframes HC might cache */ |
| |
| union ehci_shadow *pshadow; /* mirror hw periodic table */ |
| int next_uframe; /* scan periodic, start here */ |
| unsigned periodic_sched; /* periodic activity count */ |
| |
| /* per root hub port */ |
| unsigned long reset_done [EHCI_MAX_ROOT_PORTS]; |
| |
| /* bit vectors (one bit per port) */ |
| unsigned long bus_suspended; /* which ports were |
| already suspended at the start of a bus suspend */ |
| unsigned long companion_ports; /* which ports are |
| dedicated to the companion controller */ |
| unsigned long owned_ports; /* which ports are |
| owned by the companion during a bus suspend */ |
| unsigned long port_c_suspend; /* which ports have |
| the change-suspend feature turned on */ |
| unsigned long suspended_ports; /* which ports are |
| suspended */ |
| |
| /* per-HC memory pools (could be per-bus, but ...) */ |
| struct dma_pool *qh_pool; /* qh per active urb */ |
| struct dma_pool *qtd_pool; /* one or more per qh */ |
| struct dma_pool *itd_pool; /* itd per iso urb */ |
| struct dma_pool *sitd_pool; /* sitd per split iso urb */ |
| |
| struct timer_list iaa_watchdog; |
| struct timer_list watchdog; |
| unsigned long actions; |
| unsigned stamp; |
| unsigned long next_statechange; |
| u32 command; |
| |
| /* SILICON QUIRKS */ |
| unsigned no_selective_suspend:1; |
| unsigned has_fsl_port_bug:1; /* FreeScale */ |
| unsigned big_endian_mmio:1; |
| unsigned big_endian_desc:1; |
| |
| u8 sbrn; /* packed release number */ |
| |
| /* irq statistics */ |
| #ifdef EHCI_STATS |
| struct ehci_stats stats; |
| # define COUNT(x) do { (x)++; } while (0) |
| #else |
| # define COUNT(x) do {} while (0) |
| #endif |
| |
| /* debug files */ |
| #ifdef DEBUG |
| struct dentry *debug_dir; |
| struct dentry *debug_async; |
| struct dentry *debug_periodic; |
| struct dentry *debug_registers; |
| #endif |
| }; |
| |
| /* convert between an HCD pointer and the corresponding EHCI_HCD */ |
| static inline struct ehci_hcd *hcd_to_ehci (struct usb_hcd *hcd) |
| { |
| return (struct ehci_hcd *) (hcd->hcd_priv); |
| } |
| static inline struct usb_hcd *ehci_to_hcd (struct ehci_hcd *ehci) |
| { |
| return container_of ((void *) ehci, struct usb_hcd, hcd_priv); |
| } |
| |
| |
| static inline void |
| iaa_watchdog_start(struct ehci_hcd *ehci) |
| { |
| WARN_ON(timer_pending(&ehci->iaa_watchdog)); |
| mod_timer(&ehci->iaa_watchdog, |
| jiffies + msecs_to_jiffies(EHCI_IAA_MSECS)); |
| } |
| |
| static inline void iaa_watchdog_done(struct ehci_hcd *ehci) |
| { |
| del_timer(&ehci->iaa_watchdog); |
| } |
| |
| enum ehci_timer_action { |
| TIMER_IO_WATCHDOG, |
| TIMER_ASYNC_SHRINK, |
| TIMER_ASYNC_OFF, |
| }; |
| |
| static inline void |
| timer_action_done (struct ehci_hcd *ehci, enum ehci_timer_action action) |
| { |
| clear_bit (action, &ehci->actions); |
| } |
| |
| static inline void |
| timer_action (struct ehci_hcd *ehci, enum ehci_timer_action action) |
| { |
| /* Don't override timeouts which shrink or (later) disable |
| * the async ring; just the I/O watchdog. Note that if a |
| * SHRINK were pending, OFF would never be requested. |
| */ |
| if (timer_pending(&ehci->watchdog) |
| && ((BIT(TIMER_ASYNC_SHRINK) | BIT(TIMER_ASYNC_OFF)) |
| & ehci->actions)) |
| return; |
| |
| if (!test_and_set_bit (action, &ehci->actions)) { |
| unsigned long t; |
| |
| switch (action) { |
| case TIMER_IO_WATCHDOG: |
| t = EHCI_IO_JIFFIES; |
| break; |
| case TIMER_ASYNC_OFF: |
| t = EHCI_ASYNC_JIFFIES; |
| break; |
| // case TIMER_ASYNC_SHRINK: |
| default: |
| /* add a jiffie since we synch against the |
| * 8 KHz uframe counter. |
| */ |
| t = DIV_ROUND_UP(EHCI_SHRINK_FRAMES * HZ, 1000) + 1; |
| break; |
| } |
| mod_timer(&ehci->watchdog, t + jiffies); |
| } |
| } |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| #include <linux/usb/ehci_def.h> |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| #define QTD_NEXT(ehci, dma) cpu_to_hc32(ehci, (u32)dma) |
| |
| /* |
| * EHCI Specification 0.95 Section 3.5 |
| * QTD: describe data transfer components (buffer, direction, ...) |
| * See Fig 3-6 "Queue Element Transfer Descriptor Block Diagram". |
| * |
| * These are associated only with "QH" (Queue Head) structures, |
| * used with control, bulk, and interrupt transfers. |
| */ |
| struct ehci_qtd { |
| /* first part defined by EHCI spec */ |
| __hc32 hw_next; /* see EHCI 3.5.1 */ |
| __hc32 hw_alt_next; /* see EHCI 3.5.2 */ |
| __hc32 hw_token; /* see EHCI 3.5.3 */ |
| #define QTD_TOGGLE (1 << 31) /* data toggle */ |
| #define QTD_LENGTH(tok) (((tok)>>16) & 0x7fff) |
| #define QTD_IOC (1 << 15) /* interrupt on complete */ |
| #define QTD_CERR(tok) (((tok)>>10) & 0x3) |
| #define QTD_PID(tok) (((tok)>>8) & 0x3) |
| #define QTD_STS_ACTIVE (1 << 7) /* HC may execute this */ |
| #define QTD_STS_HALT (1 << 6) /* halted on error */ |
| #define QTD_STS_DBE (1 << 5) /* data buffer error (in HC) */ |
| #define QTD_STS_BABBLE (1 << 4) /* device was babbling (qtd halted) */ |
| #define QTD_STS_XACT (1 << 3) /* device gave illegal response */ |
| #define QTD_STS_MMF (1 << 2) /* incomplete split transaction */ |
| #define QTD_STS_STS (1 << 1) /* split transaction state */ |
| #define QTD_STS_PING (1 << 0) /* issue PING? */ |
| |
| #define ACTIVE_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_ACTIVE) |
| #define HALT_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_HALT) |
| #define STATUS_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_STS) |
| |
| __hc32 hw_buf [5]; /* see EHCI 3.5.4 */ |
| __hc32 hw_buf_hi [5]; /* Appendix B */ |
| |
| /* the rest is HCD-private */ |
| dma_addr_t qtd_dma; /* qtd address */ |
| struct list_head qtd_list; /* sw qtd list */ |
| struct urb *urb; /* qtd's urb */ |
| size_t length; /* length of buffer */ |
| } __attribute__ ((aligned (32))); |
| |
| /* mask NakCnt+T in qh->hw_alt_next */ |
| #define QTD_MASK(ehci) cpu_to_hc32 (ehci, ~0x1f) |
| |
| #define IS_SHORT_READ(token) (QTD_LENGTH (token) != 0 && QTD_PID (token) == 1) |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* type tag from {qh,itd,sitd,fstn}->hw_next */ |
| #define Q_NEXT_TYPE(ehci,dma) ((dma) & cpu_to_hc32(ehci, 3 << 1)) |
| |
| /* |
| * Now the following defines are not converted using the |
| * __constant_cpu_to_le32() macro anymore, since we have to support |
| * "dynamic" switching between be and le support, so that the driver |
| * can be used on one system with SoC EHCI controller using big-endian |
| * descriptors as well as a normal little-endian PCI EHCI controller. |
| */ |
| /* values for that type tag */ |
| #define Q_TYPE_ITD (0 << 1) |
| #define Q_TYPE_QH (1 << 1) |
| #define Q_TYPE_SITD (2 << 1) |
| #define Q_TYPE_FSTN (3 << 1) |
| |
| /* next async queue entry, or pointer to interrupt/periodic QH */ |
| #define QH_NEXT(ehci,dma) (cpu_to_hc32(ehci, (((u32)dma)&~0x01f)|Q_TYPE_QH)) |
| |
| /* for periodic/async schedules and qtd lists, mark end of list */ |
| #define EHCI_LIST_END(ehci) cpu_to_hc32(ehci, 1) /* "null pointer" to hw */ |
| |
| /* |
| * Entries in periodic shadow table are pointers to one of four kinds |
| * of data structure. That's dictated by the hardware; a type tag is |
| * encoded in the low bits of the hardware's periodic schedule. Use |
| * Q_NEXT_TYPE to get the tag. |
| * |
| * For entries in the async schedule, the type tag always says "qh". |
| */ |
| union ehci_shadow { |
| struct ehci_qh *qh; /* Q_TYPE_QH */ |
| struct ehci_itd *itd; /* Q_TYPE_ITD */ |
| struct ehci_sitd *sitd; /* Q_TYPE_SITD */ |
| 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. |
| */ |
| #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 */ |