forked from Minki/linux
bc96c0ad1e
This patch changes the HCDs that used the old hub_set_power_budget call, making them use the new hcd->power_budget field instead. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
638 lines
20 KiB
C
638 lines
20 KiB
C
/*
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* OHCI HCD (Host Controller Driver) for USB.
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*
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* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
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* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
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*
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* This file is licenced under the GPL.
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*/
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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 OHCI_BIG_ENDIAN), depending on the
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* host controller implementation.
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*/
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typedef __u32 __bitwise __hc32;
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typedef __u16 __bitwise __hc16;
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/*
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* OHCI Endpoint Descriptor (ED) ... holds TD queue
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* See OHCI spec, section 4.2
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*
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* This is a "Queue Head" for those transfers, which is why
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* both EHCI and UHCI call similar structures a "QH".
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*/
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struct ed {
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/* first fields are hardware-specified */
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__hc32 hwINFO; /* endpoint config bitmap */
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/* info bits defined by hcd */
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#define ED_DEQUEUE (1 << 27)
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/* info bits defined by the hardware */
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#define ED_ISO (1 << 15)
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#define ED_SKIP (1 << 14)
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#define ED_LOWSPEED (1 << 13)
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#define ED_OUT (0x01 << 11)
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#define ED_IN (0x02 << 11)
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__hc32 hwTailP; /* tail of TD list */
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__hc32 hwHeadP; /* head of TD list (hc r/w) */
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#define ED_C (0x02) /* toggle carry */
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#define ED_H (0x01) /* halted */
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__hc32 hwNextED; /* next ED in list */
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/* rest are purely for the driver's use */
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dma_addr_t dma; /* addr of ED */
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struct td *dummy; /* next TD to activate */
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/* host's view of schedule */
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struct ed *ed_next; /* on schedule or rm_list */
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struct ed *ed_prev; /* for non-interrupt EDs */
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struct list_head td_list; /* "shadow list" of our TDs */
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/* create --> IDLE --> OPER --> ... --> IDLE --> destroy
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* usually: OPER --> UNLINK --> (IDLE | OPER) --> ...
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*/
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u8 state; /* ED_{IDLE,UNLINK,OPER} */
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#define ED_IDLE 0x00 /* NOT linked to HC */
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#define ED_UNLINK 0x01 /* being unlinked from hc */
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#define ED_OPER 0x02 /* IS linked to hc */
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u8 type; /* PIPE_{BULK,...} */
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/* periodic scheduling params (for intr and iso) */
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u8 branch;
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u16 interval;
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u16 load;
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u16 last_iso; /* iso only */
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/* HC may see EDs on rm_list until next frame (frame_no == tick) */
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u16 tick;
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} __attribute__ ((aligned(16)));
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#define ED_MASK ((u32)~0x0f) /* strip hw status in low addr bits */
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/*
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* OHCI Transfer Descriptor (TD) ... one per transfer segment
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* See OHCI spec, sections 4.3.1 (general = control/bulk/interrupt)
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* and 4.3.2 (iso)
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*/
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struct td {
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/* first fields are hardware-specified */
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__hc32 hwINFO; /* transfer info bitmask */
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/* hwINFO bits for both general and iso tds: */
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#define TD_CC 0xf0000000 /* condition code */
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#define TD_CC_GET(td_p) ((td_p >>28) & 0x0f)
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//#define TD_CC_SET(td_p, cc) (td_p) = ((td_p) & 0x0fffffff) | (((cc) & 0x0f) << 28)
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#define TD_DI 0x00E00000 /* frames before interrupt */
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#define TD_DI_SET(X) (((X) & 0x07)<< 21)
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/* these two bits are available for definition/use by HCDs in both
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* general and iso tds ... others are available for only one type
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*/
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#define TD_DONE 0x00020000 /* retired to donelist */
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#define TD_ISO 0x00010000 /* copy of ED_ISO */
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/* hwINFO bits for general tds: */
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#define TD_EC 0x0C000000 /* error count */
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#define TD_T 0x03000000 /* data toggle state */
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#define TD_T_DATA0 0x02000000 /* DATA0 */
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#define TD_T_DATA1 0x03000000 /* DATA1 */
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#define TD_T_TOGGLE 0x00000000 /* uses ED_C */
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#define TD_DP 0x00180000 /* direction/pid */
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#define TD_DP_SETUP 0x00000000 /* SETUP pid */
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#define TD_DP_IN 0x00100000 /* IN pid */
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#define TD_DP_OUT 0x00080000 /* OUT pid */
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/* 0x00180000 rsvd */
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#define TD_R 0x00040000 /* round: short packets OK? */
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/* (no hwINFO #defines yet for iso tds) */
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__hc32 hwCBP; /* Current Buffer Pointer (or 0) */
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__hc32 hwNextTD; /* Next TD Pointer */
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__hc32 hwBE; /* Memory Buffer End Pointer */
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/* PSW is only for ISO. Only 1 PSW entry is used, but on
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* big-endian PPC hardware that's the second entry.
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*/
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#define MAXPSW 2
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__hc16 hwPSW [MAXPSW];
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/* rest are purely for the driver's use */
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__u8 index;
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struct ed *ed;
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struct td *td_hash; /* dma-->td hashtable */
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struct td *next_dl_td;
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struct urb *urb;
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dma_addr_t td_dma; /* addr of this TD */
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dma_addr_t data_dma; /* addr of data it points to */
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struct list_head td_list; /* "shadow list", TDs on same ED */
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} __attribute__ ((aligned(32))); /* c/b/i need 16; only iso needs 32 */
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#define TD_MASK ((u32)~0x1f) /* strip hw status in low addr bits */
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/*
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* Hardware transfer status codes -- CC from td->hwINFO or td->hwPSW
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*/
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#define TD_CC_NOERROR 0x00
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#define TD_CC_CRC 0x01
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#define TD_CC_BITSTUFFING 0x02
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#define TD_CC_DATATOGGLEM 0x03
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#define TD_CC_STALL 0x04
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#define TD_DEVNOTRESP 0x05
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#define TD_PIDCHECKFAIL 0x06
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#define TD_UNEXPECTEDPID 0x07
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#define TD_DATAOVERRUN 0x08
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#define TD_DATAUNDERRUN 0x09
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/* 0x0A, 0x0B reserved for hardware */
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#define TD_BUFFEROVERRUN 0x0C
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#define TD_BUFFERUNDERRUN 0x0D
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/* 0x0E, 0x0F reserved for HCD */
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#define TD_NOTACCESSED 0x0F
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/* map OHCI TD status codes (CC) to errno values */
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static const int cc_to_error [16] = {
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/* No Error */ 0,
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/* CRC Error */ -EILSEQ,
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/* Bit Stuff */ -EPROTO,
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/* Data Togg */ -EILSEQ,
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/* Stall */ -EPIPE,
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/* DevNotResp */ -ETIMEDOUT,
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/* PIDCheck */ -EPROTO,
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/* UnExpPID */ -EPROTO,
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/* DataOver */ -EOVERFLOW,
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/* DataUnder */ -EREMOTEIO,
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/* (for hw) */ -EIO,
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/* (for hw) */ -EIO,
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/* BufferOver */ -ECOMM,
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/* BuffUnder */ -ENOSR,
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/* (for HCD) */ -EALREADY,
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/* (for HCD) */ -EALREADY
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};
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/*
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* The HCCA (Host Controller Communications Area) is a 256 byte
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* structure defined section 4.4.1 of the OHCI spec. The HC is
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* told the base address of it. It must be 256-byte aligned.
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*/
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struct ohci_hcca {
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#define NUM_INTS 32
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__hc32 int_table [NUM_INTS]; /* periodic schedule */
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/*
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* OHCI defines u16 frame_no, followed by u16 zero pad.
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* Since some processors can't do 16 bit bus accesses,
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* portable access must be a 32 bits wide.
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*/
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__hc32 frame_no; /* current frame number */
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__hc32 done_head; /* info returned for an interrupt */
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u8 reserved_for_hc [116];
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u8 what [4]; /* spec only identifies 252 bytes :) */
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} __attribute__ ((aligned(256)));
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/*
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* This is the structure of the OHCI controller's memory mapped I/O region.
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* You must use readl() and writel() (in <asm/io.h>) to access these fields!!
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* Layout is in section 7 (and appendix B) of the spec.
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*/
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struct ohci_regs {
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/* control and status registers (section 7.1) */
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__hc32 revision;
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__hc32 control;
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__hc32 cmdstatus;
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__hc32 intrstatus;
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__hc32 intrenable;
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__hc32 intrdisable;
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/* memory pointers (section 7.2) */
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__hc32 hcca;
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__hc32 ed_periodcurrent;
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__hc32 ed_controlhead;
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__hc32 ed_controlcurrent;
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__hc32 ed_bulkhead;
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__hc32 ed_bulkcurrent;
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__hc32 donehead;
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/* frame counters (section 7.3) */
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__hc32 fminterval;
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__hc32 fmremaining;
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__hc32 fmnumber;
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__hc32 periodicstart;
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__hc32 lsthresh;
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/* Root hub ports (section 7.4) */
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struct ohci_roothub_regs {
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__hc32 a;
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__hc32 b;
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__hc32 status;
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#define MAX_ROOT_PORTS 15 /* maximum OHCI root hub ports (RH_A_NDP) */
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__hc32 portstatus [MAX_ROOT_PORTS];
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} roothub;
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/* and optional "legacy support" registers (appendix B) at 0x0100 */
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} __attribute__ ((aligned(32)));
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/* OHCI CONTROL AND STATUS REGISTER MASKS */
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/*
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* HcControl (control) register masks
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*/
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#define OHCI_CTRL_CBSR (3 << 0) /* control/bulk service ratio */
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#define OHCI_CTRL_PLE (1 << 2) /* periodic list enable */
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#define OHCI_CTRL_IE (1 << 3) /* isochronous enable */
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#define OHCI_CTRL_CLE (1 << 4) /* control list enable */
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#define OHCI_CTRL_BLE (1 << 5) /* bulk list enable */
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#define OHCI_CTRL_HCFS (3 << 6) /* host controller functional state */
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#define OHCI_CTRL_IR (1 << 8) /* interrupt routing */
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#define OHCI_CTRL_RWC (1 << 9) /* remote wakeup connected */
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#define OHCI_CTRL_RWE (1 << 10) /* remote wakeup enable */
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/* pre-shifted values for HCFS */
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# define OHCI_USB_RESET (0 << 6)
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# define OHCI_USB_RESUME (1 << 6)
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# define OHCI_USB_OPER (2 << 6)
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# define OHCI_USB_SUSPEND (3 << 6)
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/*
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* HcCommandStatus (cmdstatus) register masks
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*/
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#define OHCI_HCR (1 << 0) /* host controller reset */
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#define OHCI_CLF (1 << 1) /* control list filled */
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#define OHCI_BLF (1 << 2) /* bulk list filled */
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#define OHCI_OCR (1 << 3) /* ownership change request */
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#define OHCI_SOC (3 << 16) /* scheduling overrun count */
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/*
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* masks used with interrupt registers:
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* HcInterruptStatus (intrstatus)
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* HcInterruptEnable (intrenable)
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* HcInterruptDisable (intrdisable)
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*/
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#define OHCI_INTR_SO (1 << 0) /* scheduling overrun */
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#define OHCI_INTR_WDH (1 << 1) /* writeback of done_head */
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#define OHCI_INTR_SF (1 << 2) /* start frame */
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#define OHCI_INTR_RD (1 << 3) /* resume detect */
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#define OHCI_INTR_UE (1 << 4) /* unrecoverable error */
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#define OHCI_INTR_FNO (1 << 5) /* frame number overflow */
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#define OHCI_INTR_RHSC (1 << 6) /* root hub status change */
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#define OHCI_INTR_OC (1 << 30) /* ownership change */
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#define OHCI_INTR_MIE (1 << 31) /* master interrupt enable */
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/* OHCI ROOT HUB REGISTER MASKS */
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/* roothub.portstatus [i] bits */
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#define RH_PS_CCS 0x00000001 /* current connect status */
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#define RH_PS_PES 0x00000002 /* port enable status*/
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#define RH_PS_PSS 0x00000004 /* port suspend status */
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#define RH_PS_POCI 0x00000008 /* port over current indicator */
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#define RH_PS_PRS 0x00000010 /* port reset status */
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#define RH_PS_PPS 0x00000100 /* port power status */
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#define RH_PS_LSDA 0x00000200 /* low speed device attached */
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#define RH_PS_CSC 0x00010000 /* connect status change */
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#define RH_PS_PESC 0x00020000 /* port enable status change */
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#define RH_PS_PSSC 0x00040000 /* port suspend status change */
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#define RH_PS_OCIC 0x00080000 /* over current indicator change */
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#define RH_PS_PRSC 0x00100000 /* port reset status change */
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/* roothub.status bits */
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#define RH_HS_LPS 0x00000001 /* local power status */
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#define RH_HS_OCI 0x00000002 /* over current indicator */
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#define RH_HS_DRWE 0x00008000 /* device remote wakeup enable */
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#define RH_HS_LPSC 0x00010000 /* local power status change */
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#define RH_HS_OCIC 0x00020000 /* over current indicator change */
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#define RH_HS_CRWE 0x80000000 /* clear remote wakeup enable */
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/* roothub.b masks */
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#define RH_B_DR 0x0000ffff /* device removable flags */
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#define RH_B_PPCM 0xffff0000 /* port power control mask */
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/* roothub.a masks */
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#define RH_A_NDP (0xff << 0) /* number of downstream ports */
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#define RH_A_PSM (1 << 8) /* power switching mode */
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#define RH_A_NPS (1 << 9) /* no power switching */
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#define RH_A_DT (1 << 10) /* device type (mbz) */
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#define RH_A_OCPM (1 << 11) /* over current protection mode */
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#define RH_A_NOCP (1 << 12) /* no over current protection */
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#define RH_A_POTPGT (0xff << 24) /* power on to power good time */
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/* hcd-private per-urb state */
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typedef struct urb_priv {
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struct ed *ed;
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u16 length; // # tds in this request
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u16 td_cnt; // tds already serviced
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struct list_head pending;
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struct td *td [0]; // all TDs in this request
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} urb_priv_t;
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#define TD_HASH_SIZE 64 /* power'o'two */
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// sizeof (struct td) ~= 64 == 2^6 ...
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#define TD_HASH_FUNC(td_dma) ((td_dma ^ (td_dma >> 6)) % TD_HASH_SIZE)
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/*
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* This is the full ohci controller description
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*
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* Note how the "proper" USB information is just
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* a subset of what the full implementation needs. (Linus)
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*/
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struct ohci_hcd {
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spinlock_t lock;
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/*
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* I/O memory used to communicate with the HC (dma-consistent)
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*/
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struct ohci_regs __iomem *regs;
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/*
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* main memory used to communicate with the HC (dma-consistent).
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* hcd adds to schedule for a live hc any time, but removals finish
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* only at the start of the next frame.
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*/
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struct ohci_hcca *hcca;
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dma_addr_t hcca_dma;
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struct ed *ed_rm_list; /* to be removed */
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struct ed *ed_bulktail; /* last in bulk list */
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struct ed *ed_controltail; /* last in ctrl list */
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struct ed *periodic [NUM_INTS]; /* shadow int_table */
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/*
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* OTG controllers and transceivers need software interaction;
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* other external transceivers should be software-transparent
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*/
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struct otg_transceiver *transceiver;
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/*
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* memory management for queue data structures
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*/
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struct dma_pool *td_cache;
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struct dma_pool *ed_cache;
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struct td *td_hash [TD_HASH_SIZE];
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struct list_head pending;
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/*
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* driver state
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*/
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int load [NUM_INTS];
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u32 hc_control; /* copy of hc control reg */
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unsigned long next_statechange; /* suspend/resume */
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u32 fminterval; /* saved register */
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struct work_struct rh_resume;
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struct notifier_block reboot_notifier;
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unsigned long flags; /* for HC bugs */
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#define OHCI_QUIRK_AMD756 0x01 /* erratum #4 */
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#define OHCI_QUIRK_SUPERIO 0x02 /* natsemi */
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#define OHCI_QUIRK_INITRESET 0x04 /* SiS, OPTi, ... */
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#define OHCI_BIG_ENDIAN 0x08 /* big endian HC */
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#define OHCI_QUIRK_ZFMICRO 0x10 /* Compaq ZFMicro chipset*/
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// there are also chip quirks/bugs in init logic
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};
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/* convert between an hcd pointer and the corresponding ohci_hcd */
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static inline struct ohci_hcd *hcd_to_ohci (struct usb_hcd *hcd)
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{
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return (struct ohci_hcd *) (hcd->hcd_priv);
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}
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static inline struct usb_hcd *ohci_to_hcd (const struct ohci_hcd *ohci)
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{
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return container_of ((void *) ohci, struct usb_hcd, hcd_priv);
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}
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/*-------------------------------------------------------------------------*/
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#ifndef DEBUG
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#define STUB_DEBUG_FILES
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#endif /* DEBUG */
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#define ohci_dbg(ohci, fmt, args...) \
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dev_dbg (ohci_to_hcd(ohci)->self.controller , fmt , ## args )
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#define ohci_err(ohci, fmt, args...) \
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dev_err (ohci_to_hcd(ohci)->self.controller , fmt , ## args )
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#define ohci_info(ohci, fmt, args...) \
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dev_info (ohci_to_hcd(ohci)->self.controller , fmt , ## args )
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#define ohci_warn(ohci, fmt, args...) \
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dev_warn (ohci_to_hcd(ohci)->self.controller , fmt , ## args )
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#ifdef OHCI_VERBOSE_DEBUG
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# define ohci_vdbg ohci_dbg
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#else
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# define ohci_vdbg(ohci, fmt, args...) do { } while (0)
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#endif
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/*-------------------------------------------------------------------------*/
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/*
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* While most USB host controllers implement their registers and
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* in-memory communication descriptors in little-endian format,
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* a minority (notably the IBM STB04XXX and the Motorola MPC5200
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* processors) implement them in big endian format.
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*
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* This attempts to support either format at compile time without a
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* runtime penalty, or both formats with the additional overhead
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* of checking a flag bit.
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*/
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#ifdef CONFIG_USB_OHCI_BIG_ENDIAN
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#ifdef CONFIG_USB_OHCI_LITTLE_ENDIAN
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#define big_endian(ohci) (ohci->flags & OHCI_BIG_ENDIAN) /* either */
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#else
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#define big_endian(ohci) 1 /* only big endian */
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#endif
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/*
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* Big-endian read/write functions are arch-specific.
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* Other arches can be added if/when they're needed.
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*/
|
|
#if defined(CONFIG_PPC)
|
|
#define readl_be(addr) in_be32((__force unsigned *)addr)
|
|
#define writel_be(val, addr) out_be32((__force unsigned *)addr, val)
|
|
#endif
|
|
|
|
static inline unsigned int ohci_readl (const struct ohci_hcd *ohci,
|
|
__hc32 __iomem * regs)
|
|
{
|
|
return big_endian(ohci) ? readl_be (regs) : readl ((__force u32 *)regs);
|
|
}
|
|
|
|
static inline void ohci_writel (const struct ohci_hcd *ohci,
|
|
const unsigned int val, __hc32 __iomem *regs)
|
|
{
|
|
big_endian(ohci) ? writel_be (val, regs) :
|
|
writel (val, (__force u32 *)regs);
|
|
}
|
|
|
|
#else /* !CONFIG_USB_OHCI_BIG_ENDIAN */
|
|
|
|
#define big_endian(ohci) 0 /* only little endian */
|
|
|
|
#ifdef CONFIG_ARCH_LH7A404
|
|
/* Marc Singer: at the time this code was written, the LH7A404
|
|
* had a problem reading the USB host registers. This
|
|
* implementation of the ohci_readl function performs the read
|
|
* twice as a work-around.
|
|
*/
|
|
static inline unsigned int
|
|
ohci_readl (const struct ohci_hcd *ohci, const __hc32 *regs)
|
|
{
|
|
*(volatile __force unsigned int*) regs;
|
|
return *(volatile __force unsigned int*) regs;
|
|
}
|
|
#else
|
|
/* Standard version of ohci_readl uses standard, platform
|
|
* specific implementation. */
|
|
static inline unsigned int
|
|
ohci_readl (const struct ohci_hcd *ohci, __hc32 __iomem * regs)
|
|
{
|
|
return readl(regs);
|
|
}
|
|
#endif
|
|
|
|
static inline void ohci_writel (const struct ohci_hcd *ohci,
|
|
const unsigned int val, __hc32 __iomem *regs)
|
|
{
|
|
writel (val, regs);
|
|
}
|
|
|
|
#endif /* !CONFIG_USB_OHCI_BIG_ENDIAN */
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* cpu to ohci */
|
|
static inline __hc16 cpu_to_hc16 (const struct ohci_hcd *ohci, const u16 x)
|
|
{
|
|
return big_endian(ohci) ? (__force __hc16)cpu_to_be16(x) : (__force __hc16)cpu_to_le16(x);
|
|
}
|
|
|
|
static inline __hc16 cpu_to_hc16p (const struct ohci_hcd *ohci, const u16 *x)
|
|
{
|
|
return big_endian(ohci) ? cpu_to_be16p(x) : cpu_to_le16p(x);
|
|
}
|
|
|
|
static inline __hc32 cpu_to_hc32 (const struct ohci_hcd *ohci, const u32 x)
|
|
{
|
|
return big_endian(ohci) ? (__force __hc32)cpu_to_be32(x) : (__force __hc32)cpu_to_le32(x);
|
|
}
|
|
|
|
static inline __hc32 cpu_to_hc32p (const struct ohci_hcd *ohci, const u32 *x)
|
|
{
|
|
return big_endian(ohci) ? cpu_to_be32p(x) : cpu_to_le32p(x);
|
|
}
|
|
|
|
/* ohci to cpu */
|
|
static inline u16 hc16_to_cpu (const struct ohci_hcd *ohci, const __hc16 x)
|
|
{
|
|
return big_endian(ohci) ? be16_to_cpu((__force __be16)x) : le16_to_cpu((__force __le16)x);
|
|
}
|
|
|
|
static inline u16 hc16_to_cpup (const struct ohci_hcd *ohci, const __hc16 *x)
|
|
{
|
|
return big_endian(ohci) ? be16_to_cpup((__force __be16 *)x) : le16_to_cpup((__force __le16 *)x);
|
|
}
|
|
|
|
static inline u32 hc32_to_cpu (const struct ohci_hcd *ohci, const __hc32 x)
|
|
{
|
|
return big_endian(ohci) ? be32_to_cpu((__force __be32)x) : le32_to_cpu((__force __le32)x);
|
|
}
|
|
|
|
static inline u32 hc32_to_cpup (const struct ohci_hcd *ohci, const __hc32 *x)
|
|
{
|
|
return big_endian(ohci) ? be32_to_cpup((__force __be32 *)x) : le32_to_cpup((__force __le32 *)x);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* HCCA frame number is 16 bits, but is accessed as 32 bits since not all
|
|
* hardware handles 16 bit reads. That creates a different confusion on
|
|
* some big-endian SOC implementations. Same thing happens with PSW access.
|
|
*/
|
|
|
|
#ifdef CONFIG_STB03xxx
|
|
#define OHCI_BE_FRAME_NO_SHIFT 16
|
|
#else
|
|
#define OHCI_BE_FRAME_NO_SHIFT 0
|
|
#endif
|
|
|
|
static inline u16 ohci_frame_no(const struct ohci_hcd *ohci)
|
|
{
|
|
u32 tmp;
|
|
if (big_endian(ohci)) {
|
|
tmp = be32_to_cpup((__force __be32 *)&ohci->hcca->frame_no);
|
|
tmp >>= OHCI_BE_FRAME_NO_SHIFT;
|
|
} else
|
|
tmp = le32_to_cpup((__force __le32 *)&ohci->hcca->frame_no);
|
|
|
|
return (u16)tmp;
|
|
}
|
|
|
|
static inline __hc16 *ohci_hwPSWp(const struct ohci_hcd *ohci,
|
|
const struct td *td, int index)
|
|
{
|
|
return (__hc16 *)(big_endian(ohci) ?
|
|
&td->hwPSW[index ^ 1] : &td->hwPSW[index]);
|
|
}
|
|
|
|
static inline u16 ohci_hwPSW(const struct ohci_hcd *ohci,
|
|
const struct td *td, int index)
|
|
{
|
|
return hc16_to_cpup(ohci, ohci_hwPSWp(ohci, td, index));
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static inline void disable (struct ohci_hcd *ohci)
|
|
{
|
|
ohci_to_hcd(ohci)->state = HC_STATE_HALT;
|
|
}
|
|
|
|
#define FI 0x2edf /* 12000 bits per frame (-1) */
|
|
#define FSMP(fi) (0x7fff & ((6 * ((fi) - 210)) / 7))
|
|
#define FIT (1 << 31)
|
|
#define LSTHRESH 0x628 /* lowspeed bit threshold */
|
|
|
|
static void periodic_reinit (struct ohci_hcd *ohci)
|
|
{
|
|
u32 fi = ohci->fminterval & 0x03fff;
|
|
u32 fit = ohci_readl(ohci, &ohci->regs->fminterval) & FIT;
|
|
|
|
ohci_writel (ohci, (fit ^ FIT) | ohci->fminterval,
|
|
&ohci->regs->fminterval);
|
|
ohci_writel (ohci, ((9 * fi) / 10) & 0x3fff,
|
|
&ohci->regs->periodicstart);
|
|
}
|
|
|
|
/* AMD-756 (D2 rev) reports corrupt register contents in some cases.
|
|
* The erratum (#4) description is incorrect. AMD's workaround waits
|
|
* till some bits (mostly reserved) are clear; ok for all revs.
|
|
*/
|
|
#define read_roothub(hc, register, mask) ({ \
|
|
u32 temp = ohci_readl (hc, &hc->regs->roothub.register); \
|
|
if (temp == -1) \
|
|
disable (hc); \
|
|
else if (hc->flags & OHCI_QUIRK_AMD756) \
|
|
while (temp & mask) \
|
|
temp = ohci_readl (hc, &hc->regs->roothub.register); \
|
|
temp; })
|
|
|
|
static u32 roothub_a (struct ohci_hcd *hc)
|
|
{ return read_roothub (hc, a, 0xfc0fe000); }
|
|
static inline u32 roothub_b (struct ohci_hcd *hc)
|
|
{ return ohci_readl (hc, &hc->regs->roothub.b); }
|
|
static inline u32 roothub_status (struct ohci_hcd *hc)
|
|
{ return ohci_readl (hc, &hc->regs->roothub.status); }
|
|
static u32 roothub_portstatus (struct ohci_hcd *hc, int i)
|
|
{ return read_roothub (hc, portstatus [i], 0xffe0fce0); }
|