/* SPDX-License-Identifier: GPL-1.0+ */
/*
* OHCI HCD ( Host Controller Driver ) for USB .
*
* ( C ) Copyright 1999 Roman Weissgaerber < weissg @ vienna . at >
* ( C ) Copyright 2000 - 2002 David Brownell < dbrownell @ users . sourceforge . net >
*
* This file is licenced under the GPL .
*/
/*
* _ _ hc32 and _ _ hc16 are " Host Controller " types , they may be equivalent to
* _ _ leXX ( normally ) or _ _ beXX ( given OHCI_BIG_ENDIAN ) , depending on the
* host controller implementation .
*/
typedef __u32 __bitwise __hc32;
typedef __u16 __bitwise __hc16;
/*
* OHCI Endpoint Descriptor ( ED ) . . . holds TD queue
* See OHCI spec , section 4 . 2
*
* This is a " Queue Head " for those transfers , which is why
* both EHCI and UHCI call similar structures a " QH " .
*/
struct ed {
/* first fields are hardware-specified */
__hc32 hwINFO; /* endpoint config bitmap */
/* info bits defined by hcd */
#define ED_DEQUEUE (1 << 27 )
/* info bits defined by the hardware */
#define ED_ISO (1 << 15 )
#define ED_SKIP (1 << 14 )
#define ED_LOWSPEED (1 << 13 )
#define ED_OUT (0 x01 << 11 )
#define ED_IN (0 x02 << 11 )
__hc32 hwTailP; /* tail of TD list */
__hc32 hwHeadP; /* head of TD list (hc r/w) */
#define ED_C (0 x02) /* toggle carry */
#define ED_H (0 x01) /* halted */
__hc32 hwNextED; /* next ED in list */
/* rest are purely for the driver's use */
dma_addr_t dma; /* addr of ED */
struct td *dummy; /* next TD to activate */
/* host's view of schedule */
struct ed *ed_next; /* on schedule or rm_list */
struct ed *ed_prev; /* for non-interrupt EDs */
struct list_head td_list; /* "shadow list" of our TDs */
struct list_head in_use_list;
/* create --> IDLE --> OPER --> ... --> IDLE --> destroy
* usually : OPER - - > UNLINK - - > ( IDLE | OPER ) - - > . . .
*/
u8 state; /* ED_{IDLE,UNLINK,OPER} */
#define ED_IDLE 0 x00 /* NOT linked to HC */
#define ED_UNLINK 0 x01 /* being unlinked from hc */
#define ED_OPER 0 x02 /* IS linked to hc */
u8 type; /* PIPE_{BULK,...} */
/* periodic scheduling params (for intr and iso) */
u8 branch;
u16 interval;
u16 load;
u16 last_iso; /* iso only */
/* HC may see EDs on rm_list until next frame (frame_no == tick) */
u16 tick;
/* Detect TDs not added to the done queue */
unsigned takeback_wdh_cnt;
struct td *pending_td;
#define OKAY_TO_TAKEBACK(ohci, ed) \
((int ) (ohci->wdh_cnt - ed->takeback_wdh_cnt) >= 0 )
} __attribute__ ((aligned(16 )));
#define ED_MASK ((u32)~0 x0f) /* strip hw status in low addr bits */
/*
* OHCI Transfer Descriptor ( TD ) . . . one per transfer segment
* See OHCI spec , sections 4 . 3 . 1 ( general = control / bulk / interrupt )
* and 4 . 3 . 2 ( iso )
*/
struct td {
/* first fields are hardware-specified */
__hc32 hwINFO; /* transfer info bitmask */
/* hwINFO bits for both general and iso tds: */
#define TD_CC 0 xf0000000 /* condition code */
#define TD_CC_GET(td_p) ((td_p >>28 ) & 0 x0f)
//#define TD_CC_SET(td_p, cc) (td_p) = ((td_p) & 0x0fffffff) | (((cc) & 0x0f) << 28)
#define TD_DI 0 x00E00000 /* frames before interrupt */
#define TD_DI_SET(X) (((X) & 0 x07)<< 21 )
/* these two bits are available for definition/use by HCDs in both
* general and iso tds . . . others are available for only one type
*/
#define TD_DONE 0 x00020000 /* retired to donelist */
#define TD_ISO 0 x00010000 /* copy of ED_ISO */
/* hwINFO bits for general tds: */
#define TD_EC 0 x0C000000 /* error count */
#define TD_T 0 x03000000 /* data toggle state */
#define TD_T_DATA0 0 x02000000 /* DATA0 */
#define TD_T_DATA1 0 x03000000 /* DATA1 */
#define TD_T_TOGGLE 0 x00000000 /* uses ED_C */
#define TD_DP 0 x00180000 /* direction/pid */
#define TD_DP_SETUP 0 x00000000 /* SETUP pid */
#define TD_DP_IN 0 x00100000 /* IN pid */
#define TD_DP_OUT 0 x00080000 /* OUT pid */
/* 0x00180000 rsvd */
#define TD_R 0 x00040000 /* round: short packets OK? */
/* (no hwINFO #defines yet for iso tds) */
__hc32 hwCBP; /* Current Buffer Pointer (or 0) */
__hc32 hwNextTD; /* Next TD Pointer */
__hc32 hwBE; /* Memory Buffer End Pointer */
/* PSW is only for ISO. Only 1 PSW entry is used, but on
* big - endian PPC hardware that ' s the second entry .
*/
#define MAXPSW 2
__hc16 hwPSW [MAXPSW];
/* rest are purely for the driver's use */
__u8 index;
struct ed *ed;
struct td *td_hash; /* dma-->td hashtable */
struct td *next_dl_td;
struct urb *urb;
dma_addr_t td_dma; /* addr of this TD */
dma_addr_t data_dma; /* addr of data it points to */
struct list_head td_list; /* "shadow list", TDs on same ED */
} __attribute__ ((aligned(32 ))); /* c/b/i need 16; only iso needs 32 */
#define TD_MASK ((u32)~0 x1f) /* strip hw status in low addr bits */
/*
* Hardware transfer status codes - - CC from td - > hwINFO or td - > hwPSW
*/
#define TD_CC_NOERROR 0 x00
#define TD_CC_CRC 0 x01
#define TD_CC_BITSTUFFING 0 x02
#define TD_CC_DATATOGGLEM 0 x03
#define TD_CC_STALL 0 x04
#define TD_DEVNOTRESP 0 x05
#define TD_PIDCHECKFAIL 0 x06
#define TD_UNEXPECTEDPID 0 x07
#define TD_DATAOVERRUN 0 x08
#define TD_DATAUNDERRUN 0 x09
/* 0x0A, 0x0B reserved for hardware */
#define TD_BUFFEROVERRUN 0 x0C
#define TD_BUFFERUNDERRUN 0 x0D
/* 0x0E, 0x0F reserved for HCD */
#define TD_NOTACCESSED 0 x0F
/* map OHCI TD status codes (CC) to errno values */
static const int __maybe_unused cc_to_error [16 ] = {
/* No Error */ 0,
/* CRC Error */ -EILSEQ,
/* Bit Stuff */ -EPROTO,
/* Data Togg */ -EILSEQ,
/* Stall */ -EPIPE,
/* DevNotResp */ -ETIME,
/* PIDCheck */ -EPROTO,
/* UnExpPID */ -EPROTO,
/* DataOver */ -EOVERFLOW,
/* DataUnder */ -EREMOTEIO,
/* (for hw) */ -EIO,
/* (for hw) */ -EIO,
/* BufferOver */ -ECOMM,
/* BuffUnder */ -ENOSR,
/* (for HCD) */ -EALREADY,
/* (for HCD) */ -EALREADY
};
/*
* The HCCA ( Host Controller Communications Area ) is a 256 byte
* structure defined section 4 . 4 . 1 of the OHCI spec . The HC is
* told the base address of it . It must be 256 - byte aligned .
*/
struct ohci_hcca {
#define NUM_INTS 32
__hc32 int_table [NUM_INTS]; /* periodic schedule */
/*
* OHCI defines u16 frame_no , followed by u16 zero pad .
* Since some processors can ' t do 16 bit bus accesses ,
* portable access must be a 32 bits wide .
*/
__hc32 frame_no; /* current frame number */
__hc32 done_head; /* info returned for an interrupt */
u8 reserved_for_hc [116 ];
u8 what [4 ]; /* spec only identifies 252 bytes :) */
} __attribute__ ((aligned(256 )));
/*
* This is the structure of the OHCI controller ' s memory mapped I / O region .
* You must use readl ( ) and writel ( ) ( in < asm / io . h > ) to access these fields ! !
* Layout is in section 7 ( and appendix B ) of the spec .
*/
struct ohci_regs {
/* control and status registers (section 7.1) */
__hc32 revision;
__hc32 control;
__hc32 cmdstatus;
__hc32 intrstatus;
__hc32 intrenable;
__hc32 intrdisable;
/* memory pointers (section 7.2) */
__hc32 hcca;
__hc32 ed_periodcurrent;
__hc32 ed_controlhead;
__hc32 ed_controlcurrent;
__hc32 ed_bulkhead;
__hc32 ed_bulkcurrent;
__hc32 donehead;
/* frame counters (section 7.3) */
__hc32 fminterval;
__hc32 fmremaining;
__hc32 fmnumber;
__hc32 periodicstart;
__hc32 lsthresh;
/* Root hub ports (section 7.4) */
struct ohci_roothub_regs {
__hc32 a;
__hc32 b;
__hc32 status;
#define MAX_ROOT_PORTS 15 /* maximum OHCI root hub ports (RH_A_NDP) */
__hc32 portstatus [MAX_ROOT_PORTS];
} roothub;
/* and optional "legacy support" registers (appendix B) at 0x0100 */
} __attribute__ ((aligned(32 )));
/* OHCI CONTROL AND STATUS REGISTER MASKS */
/*
* HcControl ( control ) register masks
*/
#define OHCI_CTRL_CBSR (3 << 0 ) /* control/bulk service ratio */
#define OHCI_CTRL_PLE (1 << 2 ) /* periodic list enable */
#define OHCI_CTRL_IE (1 << 3 ) /* isochronous enable */
#define OHCI_CTRL_CLE (1 << 4 ) /* control list enable */
#define OHCI_CTRL_BLE (1 << 5 ) /* bulk list enable */
#define OHCI_CTRL_HCFS (3 << 6 ) /* host controller functional state */
#define OHCI_CTRL_IR (1 << 8 ) /* interrupt routing */
#define OHCI_CTRL_RWC (1 << 9 ) /* remote wakeup connected */
#define OHCI_CTRL_RWE (1 << 10 ) /* remote wakeup enable */
/* pre-shifted values for HCFS */
# define OHCI_USB_RESET (0 << 6 )
# define OHCI_USB_RESUME (1 << 6 )
# define OHCI_USB_OPER (2 << 6 )
# define OHCI_USB_SUSPEND (3 << 6 )
/*
* HcCommandStatus ( cmdstatus ) register masks
*/
#define OHCI_HCR (1 << 0 ) /* host controller reset */
#define OHCI_CLF (1 << 1 ) /* control list filled */
#define OHCI_BLF (1 << 2 ) /* bulk list filled */
#define OHCI_OCR (1 << 3 ) /* ownership change request */
#define OHCI_SOC (3 << 16 ) /* scheduling overrun count */
/*
* masks used with interrupt registers :
* HcInterruptStatus ( intrstatus )
* HcInterruptEnable ( intrenable )
* HcInterruptDisable ( intrdisable )
*/
#define OHCI_INTR_SO (1 << 0 ) /* scheduling overrun */
#define OHCI_INTR_WDH (1 << 1 ) /* writeback of done_head */
#define OHCI_INTR_SF (1 << 2 ) /* start frame */
#define OHCI_INTR_RD (1 << 3 ) /* resume detect */
#define OHCI_INTR_UE (1 << 4 ) /* unrecoverable error */
#define OHCI_INTR_FNO (1 << 5 ) /* frame number overflow */
#define OHCI_INTR_RHSC (1 << 6 ) /* root hub status change */
#define OHCI_INTR_OC (1 << 30 ) /* ownership change */
#define OHCI_INTR_MIE (1 << 31 ) /* master interrupt enable */
/* OHCI ROOT HUB REGISTER MASKS */
/* roothub.portstatus [i] bits */
#define RH_PS_CCS 0 x00000001 /* current connect status */
#define RH_PS_PES 0 x00000002 /* port enable status*/
#define RH_PS_PSS 0 x00000004 /* port suspend status */
#define RH_PS_POCI 0 x00000008 /* port over current indicator */
#define RH_PS_PRS 0 x00000010 /* port reset status */
#define RH_PS_PPS 0 x00000100 /* port power status */
#define RH_PS_LSDA 0 x00000200 /* low speed device attached */
#define RH_PS_CSC 0 x00010000 /* connect status change */
#define RH_PS_PESC 0 x00020000 /* port enable status change */
#define RH_PS_PSSC 0 x00040000 /* port suspend status change */
#define RH_PS_OCIC 0 x00080000 /* over current indicator change */
#define RH_PS_PRSC 0 x00100000 /* port reset status change */
/* roothub.status bits */
#define RH_HS_LPS 0 x00000001 /* local power status */
#define RH_HS_OCI 0 x00000002 /* over current indicator */
#define RH_HS_DRWE 0 x00008000 /* device remote wakeup enable */
#define RH_HS_LPSC 0 x00010000 /* local power status change */
#define RH_HS_OCIC 0 x00020000 /* over current indicator change */
#define RH_HS_CRWE 0 x80000000 /* clear remote wakeup enable */
/* roothub.b masks */
#define RH_B_DR 0 x0000ffff /* device removable flags */
#define RH_B_PPCM 0 xffff0000 /* port power control mask */
/* roothub.a masks */
#define RH_A_NDP (0 xff << 0 ) /* number of downstream ports */
#define RH_A_PSM (1 << 8 ) /* power switching mode */
#define RH_A_NPS (1 << 9 ) /* no power switching */
#define RH_A_DT (1 << 10 ) /* device type (mbz) */
#define RH_A_OCPM (1 << 11 ) /* over current protection mode */
#define RH_A_NOCP (1 << 12 ) /* no over current protection */
#define RH_A_POTPGT (0 xff << 24 ) /* power on to power good time */
/* hcd-private per-urb state */
typedef struct urb_priv {
struct ed *ed;
u16 length; // # tds in this request
u16 td_cnt; // tds already serviced
struct list_head pending;
struct td *td[] __counted_by(length); // all TDs in this request
} urb_priv_t;
#define TD_HASH_SIZE 64 /* power'o'two */
// sizeof (struct td) ~= 64 == 2^6 ...
#define TD_HASH_FUNC(td_dma) ((td_dma ^ (td_dma >> 6 )) % TD_HASH_SIZE)
/*
* This is the full ohci controller description
*
* Note how the " proper " USB information is just
* a subset of what the full implementation needs . ( Linus )
*/
enum ohci_rh_state {
OHCI_RH_HALTED,
OHCI_RH_SUSPENDED,
OHCI_RH_RUNNING
};
struct ohci_hcd {
spinlock_t lock;
/*
* I / O memory used to communicate with the HC ( dma - consistent )
*/
struct ohci_regs __iomem *regs;
/*
* main memory used to communicate with the HC ( dma - consistent ) .
* hcd adds to schedule for a live hc any time , but removals finish
* only at the start of the next frame .
*/
struct ohci_hcca *hcca;
dma_addr_t hcca_dma;
struct ed *ed_rm_list; /* to be removed */
struct ed *ed_bulktail; /* last in bulk list */
struct ed *ed_controltail; /* last in ctrl list */
struct ed *periodic [NUM_INTS]; /* shadow int_table */
void (*start_hnp)(struct ohci_hcd *ohci);
/*
* memory management for queue data structures
*
* @ td_cache and @ ed_cache are % NULL if & usb_hcd . localmem_pool is used .
*/
struct dma_pool *td_cache;
struct dma_pool *ed_cache;
struct td *td_hash [TD_HASH_SIZE];
struct td *dl_start, *dl_end; /* the done list */
struct list_head pending;
struct list_head eds_in_use; /* all EDs with at least 1 TD */
/*
* driver state
*/
enum ohci_rh_state rh_state;
int num_ports;
int load [NUM_INTS];
u32 hc_control; /* copy of hc control reg */
unsigned long next_statechange; /* suspend/resume */
u32 fminterval; /* saved register */
unsigned autostop:1 ; /* rh auto stopping/stopped */
unsigned working:1 ;
unsigned restart_work:1 ;
unsigned long flags; /* for HC bugs */
#define OHCI_QUIRK_AMD756 0 x01 /* erratum #4 */
#define OHCI_QUIRK_SUPERIO 0 x02 /* natsemi */
#define OHCI_QUIRK_INITRESET 0 x04 /* SiS, OPTi, ... */
#define OHCI_QUIRK_BE_DESC 0 x08 /* BE descriptors */
#define OHCI_QUIRK_BE_MMIO 0 x10 /* BE registers */
#define OHCI_QUIRK_ZFMICRO 0 x20 /* Compaq ZFMicro chipset*/
#define OHCI_QUIRK_NEC 0 x40 /* lost interrupts */
#define OHCI_QUIRK_FRAME_NO 0 x80 /* no big endian frame_no shift */
#define OHCI_QUIRK_HUB_POWER 0 x100 /* distrust firmware power/oc setup */
#define OHCI_QUIRK_AMD_PLL 0 x200 /* AMD PLL quirk*/
#define OHCI_QUIRK_AMD_PREFETCH 0 x400 /* pre-fetch for ISO transfer */
#define OHCI_QUIRK_GLOBAL_SUSPEND 0 x800 /* must suspend ports */
#define OHCI_QUIRK_QEMU 0 x1000 /* relax timing expectations */
// there are also chip quirks/bugs in init logic
unsigned prev_frame_no;
unsigned wdh_cnt, prev_wdh_cnt;
u32 prev_donehead;
struct timer_list io_watchdog;
struct work_struct nec_work; /* Worker for NEC quirk */
struct dentry *debug_dir;
/* platform-specific data -- must come last */
unsigned long priv[] __aligned(sizeof (s64));
};
#ifdef CONFIG_USB_PCI
static inline int quirk_nec(struct ohci_hcd *ohci)
{
return ohci->flags & OHCI_QUIRK_NEC;
}
static inline int quirk_zfmicro(struct ohci_hcd *ohci)
{
return ohci->flags & OHCI_QUIRK_ZFMICRO;
}
static inline int quirk_amdiso(struct ohci_hcd *ohci)
{
return ohci->flags & OHCI_QUIRK_AMD_PLL;
}
static inline int quirk_amdprefetch(struct ohci_hcd *ohci)
{
return ohci->flags & OHCI_QUIRK_AMD_PREFETCH;
}
#else
static inline int quirk_nec(struct ohci_hcd *ohci)
{
return 0 ;
}
static inline int quirk_zfmicro(struct ohci_hcd *ohci)
{
return 0 ;
}
static inline int quirk_amdiso(struct ohci_hcd *ohci)
{
return 0 ;
}
static inline int quirk_amdprefetch(struct ohci_hcd *ohci)
{
return 0 ;
}
#endif
/* convert between an hcd pointer and the corresponding ohci_hcd */
static inline struct ohci_hcd *hcd_to_ohci (struct usb_hcd *hcd)
{
return (struct ohci_hcd *) (hcd->hcd_priv);
}
static inline struct usb_hcd *ohci_to_hcd (const struct ohci_hcd *ohci)
{
return container_of ((void *) ohci, struct usb_hcd, hcd_priv);
}
/*-------------------------------------------------------------------------*/
#define ohci_dbg(ohci, fmt, args...) \
dev_dbg (ohci_to_hcd(ohci)->self.controller , fmt , ## args )
#define ohci_err(ohci, fmt, args...) \
dev_err (ohci_to_hcd(ohci)->self.controller , fmt , ## args )
#define ohci_info(ohci, fmt, args...) \
dev_info (ohci_to_hcd(ohci)->self.controller , fmt , ## args )
#define ohci_warn(ohci, fmt, args...) \
dev_warn (ohci_to_hcd(ohci)->self.controller , fmt , ## args )
/*-------------------------------------------------------------------------*/
/*
* While most USB host controllers implement their registers and
* in - memory communication descriptors in little - endian format ,
* a minority ( notably the IBM STB04XXX and the Motorola MPC5200
* processors ) implement them in big endian format .
*
* In addition some more exotic implementations like the Toshiba
* Spider ( aka SCC ) cell southbridge are " mixed " endian , that is ,
* they have a different endianness for registers vs . in - memory
* descriptors .
*
* 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 .
*
* That leads to some tricky Kconfig rules howevber . There are
* different defaults based on some arch / ppc platforms , though
* the basic rules are :
*
* Controller type Kconfig options needed
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
* little endian CONFIG_USB_OHCI_LITTLE_ENDIAN
*
* fully big endian CONFIG_USB_OHCI_BIG_ENDIAN_DESC _ and_
* CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
*
* mixed endian CONFIG_USB_OHCI_LITTLE_ENDIAN _ and_
* CONFIG_USB_OHCI_BIG_ENDIAN_ { MMIO , DESC }
*
* ( If you have a mixed endian controller , you - must - also define
* CONFIG_USB_OHCI_LITTLE_ENDIAN or things will not work when building
* both your mixed endian and a fully big endian controller support in
* the same kernel image ) .
*/
#ifdef CONFIG_USB_OHCI_BIG_ENDIAN_DESC
#ifdef CONFIG_USB_OHCI_LITTLE_ENDIAN
#define big_endian_desc(ohci) (ohci->flags & OHCI_QUIRK_BE_DESC)
#else
#define big_endian_desc(ohci) 1 /* only big endian */
#endif
#else
#define big_endian_desc(ohci) 0 /* only little endian */
#endif
#ifdef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
#ifdef CONFIG_USB_OHCI_LITTLE_ENDIAN
#define big_endian_mmio(ohci) (ohci->flags & OHCI_QUIRK_BE_MMIO)
#else
#define big_endian_mmio(ohci) 1 /* only big endian */
#endif
#else
#define big_endian_mmio(ohci) 0 /* only little endian */
#endif
/*
* Big - endian read / write functions are arch - specific .
* Other arches can be added if / when they ' re needed .
*
*/
static inline unsigned int _ohci_readl (const struct ohci_hcd *ohci,
__hc32 __iomem * regs)
{
#ifdef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
return big_endian_mmio(ohci) ?
readl_be (regs) :
readl (regs);
#else
return readl (regs);
#endif
}
static inline void _ohci_writel (const struct ohci_hcd *ohci,
const unsigned int val, __hc32 __iomem *regs)
{
#ifdef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
big_endian_mmio(ohci) ?
writel_be (val, regs) :
writel (val, regs);
#else
writel (val, regs);
#endif
}
#define ohci_readl(o,r) _ohci_readl(o,r)
#define ohci_writel(o,v,r) _ohci_writel(o,v,r)
/*-------------------------------------------------------------------------*/
/* cpu to ohci */
static inline __hc16 cpu_to_hc16 (const struct ohci_hcd *ohci, const u16 x)
{
return big_endian_desc(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_desc(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_desc(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_desc(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_desc(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_desc(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_desc(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_desc(ohci) ?
be32_to_cpup((__force __be32 *)x) :
le32_to_cpup((__force __le32 *)x);
}
/*-------------------------------------------------------------------------*/
/*
* The HCCA frame number is 16 bits , but is accessed as 32 bits since not all
* hardware handles 16 bit reads . Depending on the SoC implementation , the
* frame number can wind up in either bits [ 31 : 16 ] ( default ) or
* [ 15 : 0 ] ( OHCI_QUIRK_FRAME_NO ) on big endian hosts .
*
* Somewhat similarly , the 16 - bit PSW fields in a transfer descriptor are
* reordered on BE .
*/
static inline u16 ohci_frame_no(const struct ohci_hcd *ohci)
{
u32 tmp;
if (big_endian_desc(ohci)) {
tmp = be32_to_cpup((__force __be32 *)&ohci->hcca->frame_no);
if (!(ohci->flags & OHCI_QUIRK_FRAME_NO))
tmp >>= 16 ;
} 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_desc(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));
}
/*-------------------------------------------------------------------------*/
#define FI 0 x2edf /* 12000 bits per frame (-1) */
#define FSMP(fi) (0 x7fff & ((6 * ((fi) - 210 )) / 7 ))
#define FIT (1 << 31 )
#define LSTHRESH 0 x628 /* lowspeed bit threshold */
static inline void periodic_reinit (struct ohci_hcd *ohci)
{
u32 fi = ohci->fminterval & 0 x03fff;
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 ) & 0 x3fff,
&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 ) \
hc->rh_state = OHCI_RH_HALTED; \
else if (hc->flags & OHCI_QUIRK_AMD756) \
while (temp & mask) \
temp = ohci_readl (hc, &hc->regs->roothub.register ); \
temp; })
static inline u32 roothub_a (struct ohci_hcd *hc)
{ return read_roothub (hc, a, 0 xfc0fe000); }
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 inline u32 roothub_portstatus (struct ohci_hcd *hc, int i)
{ return read_roothub (hc, portstatus [i], 0 xffe0fce0); }
/* Declarations of things exported for use by ohci platform drivers */
struct ohci_driver_overrides {
const char *product_desc;
size_t extra_priv_size;
int (*reset)(struct usb_hcd *hcd);
};
extern void ohci_init_driver(struct hc_driver *drv,
const struct ohci_driver_overrides *over);
extern int ohci_restart(struct ohci_hcd *ohci);
extern int ohci_setup(struct usb_hcd *hcd);
extern int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup);
extern int ohci_resume(struct usb_hcd *hcd, bool hibernated);
extern int ohci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength);
extern int ohci_hub_status_data(struct usb_hcd *hcd, char *buf);
Messung V0.5 in Prozent C=89 H=93 G=90
¤ Dauer der Verarbeitung: 0.13 Sekunden
(vorverarbeitet am 2026-09-28)
¤
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