diff options
Diffstat (limited to 'drivers/usb/host/ehci.h')
| -rw-r--r-- | drivers/usb/host/ehci.h | 573 |
1 files changed, 305 insertions, 268 deletions
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index bf92d209a1a..eee228a26a0 100644 --- a/drivers/usb/host/ehci.h +++ b/drivers/usb/host/ehci.h @@ -37,12 +37,16 @@ typedef __u16 __bitwise __hc16; #define __hc16 __le16 #endif -/* statistics can be kept for for tuning/monitoring */ +/* statistics can be kept for tuning/monitoring */ +#ifdef CONFIG_DYNAMIC_DEBUG +#define EHCI_STATS +#endif + struct ehci_stats { /* irq usage */ unsigned long normal; unsigned long error; - unsigned long reclaim; + unsigned long iaa; unsigned long lost_iaa; /* termination of urbs from core */ @@ -50,8 +54,30 @@ struct ehci_stats { unsigned long unlink; }; +/* + * Scheduling and budgeting information for periodic transfers, for both + * high-speed devices and full/low-speed devices lying behind a TT. + */ +struct ehci_per_sched { + struct usb_device *udev; /* access to the TT */ + struct usb_host_endpoint *ep; + struct list_head ps_list; /* node on ehci_tt's ps_list */ + u16 tt_usecs; /* time on the FS/LS bus */ + u16 cs_mask; /* C-mask and S-mask bytes */ + u16 period; /* actual period in frames */ + u16 phase; /* actual phase, frame part */ + u8 bw_phase; /* same, for bandwidth + reservation */ + u8 phase_uf; /* uframe part of the phase */ + u8 usecs, c_usecs; /* times on the HS bus */ + u8 bw_uperiod; /* period in microframes, for + bandwidth reservation */ + u8 bw_period; /* same, in frames */ +}; +#define NO_FRAME 29999 /* frame not assigned yet */ + /* ehci_hcd->lock guards shared data against other CPUs: - * ehci_hcd: async, reclaim, periodic (and shadow), ... + * ehci_hcd: async, unlink, periodic (and shadow), ... * usb_host_endpoint: hcpriv * ehci_qh: qh_next, qtd_list * ehci_qtd: qtd_list @@ -62,7 +88,49 @@ struct ehci_stats { #define EHCI_MAX_ROOT_PORTS 15 /* see HCS_N_PORTS */ +/* + * ehci_rh_state values of EHCI_RH_RUNNING or above mean that the + * controller may be doing DMA. Lower values mean there's no DMA. + */ +enum ehci_rh_state { + EHCI_RH_HALTED, + EHCI_RH_SUSPENDED, + EHCI_RH_RUNNING, + EHCI_RH_STOPPING +}; + +/* + * Timer events, ordered by increasing delay length. + * Always update event_delays_ns[] and event_handlers[] (defined in + * ehci-timer.c) in parallel with this list. + */ +enum ehci_hrtimer_event { + EHCI_HRTIMER_POLL_ASS, /* Poll for async schedule off */ + EHCI_HRTIMER_POLL_PSS, /* Poll for periodic schedule off */ + EHCI_HRTIMER_POLL_DEAD, /* Wait for dead controller to stop */ + EHCI_HRTIMER_UNLINK_INTR, /* Wait for interrupt QH unlink */ + EHCI_HRTIMER_FREE_ITDS, /* Wait for unused iTDs and siTDs */ + EHCI_HRTIMER_START_UNLINK_INTR, /* Unlink empty interrupt QHs */ + EHCI_HRTIMER_ASYNC_UNLINKS, /* Unlink empty async QHs */ + EHCI_HRTIMER_IAA_WATCHDOG, /* Handle lost IAA interrupts */ + EHCI_HRTIMER_DISABLE_PERIODIC, /* Wait to disable periodic sched */ + EHCI_HRTIMER_DISABLE_ASYNC, /* Wait to disable async sched */ + EHCI_HRTIMER_IO_WATCHDOG, /* Check for missing IRQs */ + EHCI_HRTIMER_NUM_EVENTS /* Must come last */ +}; +#define EHCI_HRTIMER_NO_EVENT 99 + struct ehci_hcd { /* one per controller */ + /* timing support */ + enum ehci_hrtimer_event next_hrtimer_event; + unsigned enabled_hrtimer_events; + ktime_t hr_timeouts[EHCI_HRTIMER_NUM_EVENTS]; + struct hrtimer hrtimer; + + int PSS_poll_count; + int ASS_poll_count; + int died_poll_count; + /* glue to PCI and HCD framework */ struct ehci_caps __iomem *caps; struct ehci_regs __iomem *regs; @@ -70,22 +138,51 @@ struct ehci_hcd { /* one per controller */ __u32 hcs_params; /* cached register copy */ spinlock_t lock; + enum ehci_rh_state rh_state; + + /* general schedule support */ + bool scanning:1; + bool need_rescan:1; + bool intr_unlinking:1; + bool iaa_in_progress:1; + bool async_unlinking:1; + bool shutdown:1; + struct ehci_qh *qh_scan_next; /* async schedule support */ struct ehci_qh *async; - struct ehci_qh *reclaim; - unsigned scanning : 1; + struct ehci_qh *dummy; /* For AMD quirk use */ + struct list_head async_unlink; + struct list_head async_idle; + unsigned async_unlink_cycle; + unsigned async_count; /* async activity count */ /* 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; + struct list_head intr_qh_list; 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 */ + struct list_head intr_unlink_wait; + struct list_head intr_unlink; + unsigned intr_unlink_wait_cycle; + unsigned intr_unlink_cycle; + unsigned now_frame; /* frame from HC hardware */ + unsigned last_iso_frame; /* last frame scanned for iso */ + unsigned intr_count; /* intr activity count */ + unsigned isoc_count; /* isoc activity count */ + unsigned periodic_count; /* periodic activity count */ + unsigned uframe_periodic_max; /* max periodic time per uframe */ + + + /* list of itds & sitds completed while now_frame was still active */ + struct list_head cached_itd_list; + struct ehci_itd *last_itd_to_free; + struct list_head cached_sitd_list; + struct ehci_sitd *last_sitd_to_free; /* per root hub port */ unsigned long reset_done [EHCI_MAX_ROOT_PORTS]; @@ -97,6 +194,12 @@ struct ehci_hcd { /* one per controller */ 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 */ + unsigned long resuming_ports; /* which ports have + started to resume */ /* per-HC memory pools (could be per-bus, but ...) */ struct dma_pool *qh_pool; /* qh per active urb */ @@ -104,20 +207,37 @@ struct ehci_hcd { /* one per controller */ 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 random_frame; unsigned long next_statechange; + ktime_t last_periodic_enable; u32 command; /* SILICON QUIRKS */ - unsigned is_tdi_rh_tt:1; /* TDI roothub with TT */ unsigned no_selective_suspend:1; unsigned has_fsl_port_bug:1; /* FreeScale */ unsigned big_endian_mmio:1; unsigned big_endian_desc:1; - + unsigned big_endian_capbase:1; + unsigned has_amcc_usb23:1; + unsigned need_io_watchdog:1; + unsigned amd_pll_fix:1; + unsigned use_dummy_qh:1; /* AMD Frame List table quirk*/ + unsigned has_synopsys_hc_bug:1; /* Synopsys HC */ + unsigned frame_index_bug:1; /* MosChip (AKA NetMos) */ + unsigned need_oc_pp_cycle:1; /* MPC834X port power */ + unsigned imx28_write_fix:1; /* For Freescale i.MX28 */ + + /* required for usb32 quirk */ + #define OHCI_CTRL_HCFS (3 << 6) + #define OHCI_USB_OPER (2 << 6) + #define OHCI_USB_SUSPEND (3 << 6) + + #define OHCI_HCCTRL_OFFSET 0x4 + #define OHCI_HCCTRL_LEN 0x4 + __hc32 *ohci_hcctrl_reg; + unsigned has_hostpc:1; + unsigned has_tdi_phy_lpm:1; + unsigned has_ppcd:1; /* support per-port change bits */ u8 sbrn; /* packed release number */ /* irq statistics */ @@ -129,12 +249,21 @@ struct ehci_hcd { /* one per controller */ #endif /* debug files */ -#ifdef DEBUG +#ifdef CONFIG_DYNAMIC_DEBUG struct dentry *debug_dir; - struct dentry *debug_async; - struct dentry *debug_periodic; - struct dentry *debug_registers; #endif + + /* bandwidth usage */ +#define EHCI_BANDWIDTH_SIZE 64 +#define EHCI_BANDWIDTH_FRAMES (EHCI_BANDWIDTH_SIZE >> 3) + u8 bandwidth[EHCI_BANDWIDTH_SIZE]; + /* us allocated per uframe */ + u8 tt_budget[EHCI_BANDWIDTH_SIZE]; + /* us budgeted per uframe */ + struct list_head tt_list; + + /* platform-specific data -- must come last */ + unsigned long priv[0] __aligned(sizeof(s64)); }; /* convert between an HCD pointer and the corresponding EHCI_HCD */ @@ -147,201 +276,9 @@ 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) -{ - 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: - t = EHCI_SHRINK_JIFFIES; - break; - } - t += jiffies; - // all timings except IAA watchdog can be overridden. - // async queue SHRINK often precedes IAA. while it's ready - // to go OFF neither can matter, and afterwards the IO - // watchdog stops unless there's still periodic traffic. - if (time_before_eq(t, ehci->watchdog.expires) - && timer_pending (&ehci->watchdog)) - return; - mod_timer (&ehci->watchdog, t); - } -} - /*-------------------------------------------------------------------------*/ -/* EHCI register interface, corresponds to EHCI Revision 0.95 specification */ - -/* Section 2.2 Host Controller Capability Registers */ -struct ehci_caps { - /* these fields are specified as 8 and 16 bit registers, - * but some hosts can't perform 8 or 16 bit PCI accesses. - */ - u32 hc_capbase; -#define HC_LENGTH(p) (((p)>>00)&0x00ff) /* bits 7:0 */ -#define HC_VERSION(p) (((p)>>16)&0xffff) /* bits 31:16 */ - u32 hcs_params; /* HCSPARAMS - offset 0x4 */ -#define HCS_DEBUG_PORT(p) (((p)>>20)&0xf) /* bits 23:20, debug port? */ -#define HCS_INDICATOR(p) ((p)&(1 << 16)) /* true: has port indicators */ -#define HCS_N_CC(p) (((p)>>12)&0xf) /* bits 15:12, #companion HCs */ -#define HCS_N_PCC(p) (((p)>>8)&0xf) /* bits 11:8, ports per CC */ -#define HCS_PORTROUTED(p) ((p)&(1 << 7)) /* true: port routing */ -#define HCS_PPC(p) ((p)&(1 << 4)) /* true: port power control */ -#define HCS_N_PORTS(p) (((p)>>0)&0xf) /* bits 3:0, ports on HC */ - - u32 hcc_params; /* HCCPARAMS - offset 0x8 */ -#define HCC_EXT_CAPS(p) (((p)>>8)&0xff) /* for pci extended caps */ -#define HCC_ISOC_CACHE(p) ((p)&(1 << 7)) /* true: can cache isoc frame */ -#define HCC_ISOC_THRES(p) (((p)>>4)&0x7) /* bits 6:4, uframes cached */ -#define HCC_CANPARK(p) ((p)&(1 << 2)) /* true: can park on async qh */ -#define HCC_PGM_FRAMELISTLEN(p) ((p)&(1 << 1)) /* true: periodic_size changes*/ -#define HCC_64BIT_ADDR(p) ((p)&(1)) /* true: can use 64-bit addr */ - u8 portroute [8]; /* nibbles for routing - offset 0xC */ -} __attribute__ ((packed)); - - -/* Section 2.3 Host Controller Operational Registers */ -struct ehci_regs { - - /* USBCMD: offset 0x00 */ - u32 command; -/* 23:16 is r/w intr rate, in microframes; default "8" == 1/msec */ -#define CMD_PARK (1<<11) /* enable "park" on async qh */ -#define CMD_PARK_CNT(c) (((c)>>8)&3) /* how many transfers to park for */ -#define CMD_LRESET (1<<7) /* partial reset (no ports, etc) */ -#define CMD_IAAD (1<<6) /* "doorbell" interrupt async advance */ -#define CMD_ASE (1<<5) /* async schedule enable */ -#define CMD_PSE (1<<4) /* periodic schedule enable */ -/* 3:2 is periodic frame list size */ -#define CMD_RESET (1<<1) /* reset HC not bus */ -#define CMD_RUN (1<<0) /* start/stop HC */ - - /* USBSTS: offset 0x04 */ - u32 status; -#define STS_ASS (1<<15) /* Async Schedule Status */ -#define STS_PSS (1<<14) /* Periodic Schedule Status */ -#define STS_RECL (1<<13) /* Reclamation */ -#define STS_HALT (1<<12) /* Not running (any reason) */ -/* some bits reserved */ - /* these STS_* flags are also intr_enable bits (USBINTR) */ -#define STS_IAA (1<<5) /* Interrupted on async advance */ -#define STS_FATAL (1<<4) /* such as some PCI access errors */ -#define STS_FLR (1<<3) /* frame list rolled over */ -#define STS_PCD (1<<2) /* port change detect */ -#define STS_ERR (1<<1) /* "error" completion (overflow, ...) */ -#define STS_INT (1<<0) /* "normal" completion (short, ...) */ - - /* USBINTR: offset 0x08 */ - u32 intr_enable; - - /* FRINDEX: offset 0x0C */ - u32 frame_index; /* current microframe number */ - /* CTRLDSSEGMENT: offset 0x10 */ - u32 segment; /* address bits 63:32 if needed */ - /* PERIODICLISTBASE: offset 0x14 */ - u32 frame_list; /* points to periodic list */ - /* ASYNCLISTADDR: offset 0x18 */ - u32 async_next; /* address of next async queue head */ - - u32 reserved [9]; - - /* CONFIGFLAG: offset 0x40 */ - u32 configured_flag; -#define FLAG_CF (1<<0) /* true: we'll support "high speed" */ - - /* PORTSC: offset 0x44 */ - u32 port_status [0]; /* up to N_PORTS */ -/* 31:23 reserved */ -#define PORT_WKOC_E (1<<22) /* wake on overcurrent (enable) */ -#define PORT_WKDISC_E (1<<21) /* wake on disconnect (enable) */ -#define PORT_WKCONN_E (1<<20) /* wake on connect (enable) */ -/* 19:16 for port testing */ -#define PORT_LED_OFF (0<<14) -#define PORT_LED_AMBER (1<<14) -#define PORT_LED_GREEN (2<<14) -#define PORT_LED_MASK (3<<14) -#define PORT_OWNER (1<<13) /* true: companion hc owns this port */ -#define PORT_POWER (1<<12) /* true: has power (see PPC) */ -#define PORT_USB11(x) (((x)&(3<<10))==(1<<10)) /* USB 1.1 device */ -/* 11:10 for detecting lowspeed devices (reset vs release ownership) */ -/* 9 reserved */ -#define PORT_RESET (1<<8) /* reset port */ -#define PORT_SUSPEND (1<<7) /* suspend port */ -#define PORT_RESUME (1<<6) /* resume it */ -#define PORT_OCC (1<<5) /* over current change */ -#define PORT_OC (1<<4) /* over current active */ -#define PORT_PEC (1<<3) /* port enable change */ -#define PORT_PE (1<<2) /* port enable */ -#define PORT_CSC (1<<1) /* connect status change */ -#define PORT_CONNECT (1<<0) /* device connected */ -#define PORT_RWC_BITS (PORT_CSC | PORT_PEC | PORT_OCC) -} __attribute__ ((packed)); - -#define USBMODE 0x68 /* USB Device mode */ -#define USBMODE_SDIS (1<<3) /* Stream disable */ -#define USBMODE_BE (1<<2) /* BE/LE endianness select */ -#define USBMODE_CM_HC (3<<0) /* host controller mode */ -#define USBMODE_CM_IDLE (0<<0) /* idle state */ - -/* Appendix C, Debug port ... intended for use with special "debug devices" - * that can help if there's no serial console. (nonstandard enumeration.) - */ -struct ehci_dbg_port { - u32 control; -#define DBGP_OWNER (1<<30) -#define DBGP_ENABLED (1<<28) -#define DBGP_DONE (1<<16) -#define DBGP_INUSE (1<<10) -#define DBGP_ERRCODE(x) (((x)>>7)&0x07) -# define DBGP_ERR_BAD 1 -# define DBGP_ERR_SIGNAL 2 -#define DBGP_ERROR (1<<6) -#define DBGP_GO (1<<5) -#define DBGP_OUT (1<<4) -#define DBGP_LEN(x) (((x)>>0)&0x0f) - u32 pids; -#define DBGP_PID_GET(x) (((x)>>16)&0xff) -#define DBGP_PID_SET(data,tok) (((data)<<8)|(tok)) - u32 data03; - u32 data47; - u32 address; -#define DBGP_EPADDR(dev,ep) (((dev)<<8)|(ep)) -} __attribute__ ((packed)); +#include <linux/usb/ehci_def.h> /*-------------------------------------------------------------------------*/ @@ -400,7 +337,7 @@ struct ehci_qtd { /* * Now the following defines are not converted using the - * __constant_cpu_to_le32() macro anymore, since we have to support + * 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. @@ -444,11 +381,17 @@ union ehci_shadow { * These appear in both the async and (for interrupt) periodic schedules. */ -struct ehci_qh { - /* first part defined by EHCI spec */ +/* first part defined by EHCI spec */ +struct ehci_qh_hw { __hc32 hw_next; /* see EHCI 3.6.1 */ __hc32 hw_info1; /* see EHCI 3.6.2 */ -#define QH_HEAD 0x00008000 +#define QH_CONTROL_EP (1 << 27) /* FS/LS control endpoint */ +#define QH_HEAD (1 << 15) /* Head of async reclamation list */ +#define QH_TOGGLE_CTL (1 << 14) /* Data toggle control */ +#define QH_HIGH_SPEED (2 << 12) /* Endpoint speed */ +#define QH_LOW_SPEED (1 << 12) +#define QH_FULL_SPEED (0 << 12) +#define QH_INACTIVATE (1 << 7) /* Inactivate on next transaction */ __hc32 hw_info2; /* see EHCI 3.6.2 */ #define QH_SMASK 0x000000ff #define QH_CMASK 0x0000ff00 @@ -463,42 +406,39 @@ struct ehci_qh { __hc32 hw_token; __hc32 hw_buf [5]; __hc32 hw_buf_hi [5]; +} __attribute__ ((aligned(32))); +struct ehci_qh { + struct ehci_qh_hw *hw; /* Must come first */ /* 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 list_head intr_node; /* list of intr QHs */ struct ehci_qtd *dummy; - struct ehci_qh *reclaim; /* next to reclaim */ - - struct ehci_hcd *ehci; + struct list_head unlink_node; + struct ehci_per_sched ps; /* scheduling info */ - /* - * 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; + unsigned unlink_cycle; 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_UNLINK_WAIT 4 /* LINKED and on unlink q */ #define QH_STATE_COMPLETING 5 /* don't touch token.HALT */ - /* periodic schedule info */ - u8 usecs; /* intr bandwidth */ + u8 xacterrs; /* XactErr retry counter */ +#define QH_XACTERR_MAX 32 /* XactErr retry limit */ + 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))); + + unsigned is_out:1; /* bulk or intr OUT */ + unsigned clearing_tt:1; /* Clear-TT-Buf in progress */ + unsigned dequeue_during_giveback:1; + unsigned exception:1; /* got a fault, or an unlink + was requested */ +}; /*-------------------------------------------------------------------------*/ @@ -519,6 +459,7 @@ struct ehci_iso_packet { struct ehci_iso_sched { struct list_head td_list; unsigned span; + unsigned first_packet; struct ehci_iso_packet packet [0]; }; @@ -527,34 +468,24 @@ struct ehci_iso_sched { * 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; + /* first field matches ehci_hq, but is NULL */ + struct ehci_qh_hw *hw; - 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; + struct ehci_per_sched ps; /* scheduling info */ + unsigned 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 uperiod; /* period in uframes */ u16 maxp; - u16 raw_mask; unsigned bandwidth; /* This is used to initialize iTD's hw_bufp fields */ @@ -669,6 +600,45 @@ struct ehci_fstn { /*-------------------------------------------------------------------------*/ +/* + * 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 /* @@ -678,31 +648,31 @@ struct ehci_fstn { * needed (mostly in root hub code). */ -#define ehci_is_TDI(e) ((e)->is_tdi_rh_tt) +#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) { + switch ((portsc >> (ehci->has_hostpc ? 25 : 26)) & 3) { case 0: return 0; case 1: - return (1<<USB_PORT_FEAT_LOWSPEED); + return USB_PORT_STAT_LOW_SPEED; case 2: default: - return (1<<USB_PORT_FEAT_HIGHSPEED); + return USB_PORT_STAT_HIGH_SPEED; } } - return (1<<USB_PORT_FEAT_HIGHSPEED); + return USB_PORT_STAT_HIGH_SPEED; } #else #define ehci_is_TDI(e) (0) -#define ehci_port_speed(ehci, portsc) (1<<USB_PORT_FEAT_HIGHSPEED) +#define ehci_port_speed(ehci, portsc) USB_PORT_STAT_HIGH_SPEED #endif /*-------------------------------------------------------------------------*/ @@ -724,27 +694,24 @@ ehci_port_speed(struct ehci_hcd *ehci, unsigned int portsc) * 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. - * - * 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) @@ -762,6 +729,18 @@ static inline unsigned int ehci_readl(const struct ehci_hcd *ehci, #endif } +#ifdef CONFIG_SOC_IMX28 +static inline void imx28_ehci_writel(const unsigned int val, + volatile __u32 __iomem *addr) +{ + __asm__ ("swp %0, %0, [%1]" : : "r"(val), "r"(addr)); +} +#else +static inline void imx28_ehci_writel(const unsigned int val, + volatile __u32 __iomem *addr) +{ +} +#endif static inline void ehci_writel(const struct ehci_hcd *ehci, const unsigned int val, __u32 __iomem *regs) { @@ -770,10 +749,37 @@ static inline void ehci_writel(const struct ehci_hcd *ehci, writel_be(val, regs) : writel(val, regs); #else - writel(val, regs); + if (ehci->imx28_write_fix) + imx28_ehci_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 + /*-------------------------------------------------------------------------*/ /* @@ -832,10 +838,41 @@ static inline u32 hc32_to_cpup (const struct ehci_hcd *ehci, const __hc32 *x) /*-------------------------------------------------------------------------*/ -#ifndef DEBUG +#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) + + +#ifndef CONFIG_DYNAMIC_DEBUG #define STUB_DEBUG_FILES -#endif /* DEBUG */ +#endif /*-------------------------------------------------------------------------*/ +/* 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 */ + +extern int ehci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, + u16 wIndex, char *buf, u16 wLength); + #endif /* __LINUX_EHCI_HCD_H */ |