usb_ohci.h

基于s3c2440的U盘读写程序

/*
 * URB OHCI HCD (Host Controller Driver) for USB.
 *
 * (C) Copyright 1999 Roman Weissgaerber <[e-mail]>
 * (C) Copyright 2000-2001 David Brownell <[e-mail]>
 *
 * usb-ohci.h
 */
static int cc_to_error[16] = 
{
    /* mapping of the OHCI CC status to error codes */
    /* No  Error  */		   0,
    /* CRC Error  */               USB_ST_CRC_ERR,
    /* Bit Stuff  */                  USB_ST_BIT_ERR,
    /* Data Togg  */               USB_ST_CRC_ERR,
    /* Stall      */                    USB_ST_STALLED,
    /* DevNotResp */               -1,
    /* PIDCheck   */               USB_ST_BIT_ERR,
    /* UnExpPID   */               USB_ST_BIT_ERR,
    /* DataOver   */               USB_ST_BUF_ERR,
    /* DataUnder  */               USB_ST_BUF_ERR,
    /* reservd    */               -1,
    /* reservd    */               -1,
    /* BufferOver */               USB_ST_BUF_ERR,
    /* BuffUnder  */               USB_ST_BUF_ERR,
    /* Not Access */               -1,
    /* Not Access */               -1
};


/* ED States */
#define ED_NEW 		0x00
#define ED_UNLINK 	0x01
#define ED_OPER		0x02
#define ED_DEL		0x04
#define ED_URB_DEL  	0x08
/* usb_ohci_ed */

struct ed 
{
    U32 hwINFO;
    U32 hwTailP;
    U32 hwHeadP;
    U32 hwNextED;
    struct ed *ed_prev;
    U8 int_period;
    U8 int_branch;
    U8 int_load;
    U8 int_interval;
    U8 state;
    U8 type;
    U16 last_iso;
    struct ed *ed_rm_list;
    struct usb_device *usb_dev;
    U32 unused[3];
}; 
/*__attribute((aligned(16)));*/
typedef struct ed ed_t;

/* TD info field */
#define TD_CC       0xf0000000
#define TD_CC_GET(td_p) ((td_p >>28) & 0x0f)
#define TD_CC_SET(td_p, cc) (td_p) = ((td_p) & 0x0fffffff) | (((cc) & 0x0f) << 28)
#define TD_EC       0x0C000000
#define TD_T        0x03000000
#define TD_T_DATA0  0x02000000
#define TD_T_DATA1  0x03000000
#define TD_T_TOGGLE 0x00000000
#define TD_R        0x00040000
#define TD_DI       0x00E00000
#define TD_DI_SET(X) (((X) & 0x07)<< 21)
#define TD_DP       0x00180000
#define TD_DP_SETUP 0x00000000
#define TD_DP_IN    0x00100000
#define TD_DP_OUT   0x00080000
#define TD_ISO	    0x00010000
#define TD_DEL      0x00020000
/* CC Codes */
#define TD_CC_NOERROR      0x00
#define TD_CC_CRC          0x01
#define TD_CC_BITSTUFFING  0x02
#define TD_CC_DATATOGGLEM  0x03
#define TD_CC_STALL        0x04
#define TD_DEVNOTRESP      0x05
#define TD_PIDCHECKFAIL    0x06
#define TD_UNEXPECTEDPID   0x07
#define TD_DATAOVERRUN     0x08
#define TD_DATAUNDERRUN    0x09
#define TD_BUFFEROVERRUN   0x0C
#define TD_BUFFERUNDERRUN  0x0D
#define TD_NOTACCESSED     0x0F
#define MAXPSW 1


struct td 
{
    U32 hwINFO;
    U32 hwCBP;		/* Current Buffer Pointer */
    U32 hwNextTD;	/* Next TD Pointer */
    U32 hwBE;		/* Memory Buffer End Pointer */
    U8 unused;
    U8 index;
    struct ed *ed;
    struct td *next_dl_td;
    struct usb_device *usb_dev;
    int transfer_len;
    U32 data;
    U32 unused2[2];
} 
/*__attribute((aligned(32)))*/;
typedef struct td td_t;
#define OHCI_ED_SKIP	(1 << 14)
/*
 * The HCCA (Host Controller Communications Area) is a 256 byte
 * structure defined in the OHCI spec. that the host controller is
 * told the base address of.  It must be 256-byte aligned.
 */
#define NUM_INTS 32	/* part of the OHCI standard */

struct ohci_hcca 
{
    U32	int_table[NUM_INTS];	/* Interrupt ED table */
    U16	frame_no;		       /* current frame number */
    U16	pad1;			       /* set to 0 on each frame_no change */
    U32	done_head;		       /* info returned for an interrupt */
    U8	reserved_for_hc[116];//116
} 
/*__attribute((aligned(256)))*/;
/*
 * Maximum number of root hub ports.
 */
#define MAX_ROOT_PORTS	2	/* maximum OHCI root hub ports 15*/
/*
 * This is the structure of the OHCI controller's memory mapped I/O
 * region.  This is Memory Mapped I/O.  You must use the readl() and
 * writel() macros defined in asm/io.h to access these!!
 */

struct ohci_regs 
{
    /* control and status registers */
    U32	revision;
    U32	control;
    U32	cmdstatus;
    U32	intrstatus;
    U32	intrenable;
    U32	intrdisable;
    /* memory pointers */
    U32	hcca;
    U32	ed_periodcurrent;
    U32	ed_controlhead;
    U32	ed_controlcurrent;
    U32	ed_bulkhead;
    U32	ed_bulkcurrent;
    U32	donehead;
    /* frame counters */
    U32	fminterval;
    U32	fmremaining;
    U32	fmnumber;
    U32	periodicstart;
    U32	lsthresh;
    /* Root hub ports */
    struct	ohci_roothub_regs 
    {
        U32	a;
        U32	b;
        U32	status;
        U32	portstatus[MAX_ROOT_PORTS];
    } 
    roothub;
} 
/*__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 */
/* Virtual Root HUB */
struct virt_root_hub 
{
    int devnum; /* Address of Root Hub endpoint */
    void *dev;  /* was urb */
    void *int_addr;
    int send;
    int interval;
};


/* USB HUB CONSTANTS (not OHCI-specific; see hub.h) */
/* destination of request */
#define RH_INTERFACE               0x01
#define RH_ENDPOINT                0x02
#define RH_OTHER                   0x03
#define RH_CLASS                   0x20
#define RH_VENDOR                  0x40
/* Requests: bRequest << 8 | bmRequestType */
#define RH_GET_STATUS           0x0080
#define RH_CLEAR_FEATURE        0x0100
#define RH_SET_FEATURE          0x0300
#define RH_SET_ADDRESS		0x0500
#define RH_GET_DESCRIPTOR	0x0680
#define RH_SET_DESCRIPTOR       0x0700
#define RH_GET_CONFIGURATION	0x0880
#define RH_SET_CONFIGURATION	0x0900
#define RH_GET_STATE            0x0280
#define RH_GET_INTERFACE        0x0A80
#define RH_SET_INTERFACE        0x0B00
#define RH_SYNC_FRAME           0x0C80
/* Our Vendor Specific Request */
#define RH_SET_EP               0x2000
/* Hub port features */
#define RH_PORT_CONNECTION         0x00
#define RH_PORT_ENABLE             0x01
#define RH_PORT_SUSPEND            0x02
#define RH_PORT_OVER_CURRENT       0x03
#define RH_PORT_RESET              0x04
#define RH_PORT_POWER              0x08
#define RH_PORT_LOW_SPEED          0x09
#define RH_C_PORT_CONNECTION       0x10
#define RH_C_PORT_ENABLE           0x11
#define RH_C_PORT_SUSPEND          0x12
#define RH_C_PORT_OVER_CURRENT     0x13
#define RH_C_PORT_RESET            0x14
/* Hub features */
#define RH_C_HUB_LOCAL_POWER       0x00
#define RH_C_HUB_OVER_CURRENT      0x01
#define RH_DEVICE_REMOTE_WAKEUP    0x00
#define RH_ENDPOINT_STALL          0x01
#define RH_ACK                     0x01
#define RH_REQ_ERR                 -1
#define RH_NACK                    0x00
/* OHCI ROOT HUB REGISTER MASKS */
/* roothub.portstatus [i] bits */
#define RH_PS_CCS            0x00000001   	/* current connect status */
#define RH_PS_PES            0x00000002   	/* port enable status*/
#define RH_PS_PSS            0x00000004   	/* port suspend status */
#define RH_PS_POCI           0x00000008   	/* port over current indicator */
#define RH_PS_PRS            0x00000010  	/* port reset status */
#define RH_PS_PPS            0x00000100   	/* port power status */
#define RH_PS_LSDA           0x00000200    	/* low speed device attached */
#define RH_PS_CSC            0x00010000 	/* connect status change */
#define RH_PS_PESC           0x00020000   	/* port enable status change */
#define RH_PS_PSSC           0x00040000    	/* port suspend status change */
#define RH_PS_OCIC           0x00080000    	/* over current indicator change */
#define RH_PS_PRSC           0x00100000   	/* port reset status change */
/* roothub.status bits */
#define RH_HS_LPS	     0x00000001		/* local power status */
#define RH_HS_OCI	     0x00000002		/* over current indicator */
#define RH_HS_DRWE	     0x00008000		/* device remote wakeup enable */
#define RH_HS_LPSC	     0x00010000		/* local power status change */
#define RH_HS_OCIC	     0x00020000		/* over current indicator change */
#define RH_HS_CRWE	     0x80000000		/* clear remote wakeup enable */
/* roothub.b masks */
#define RH_B_DR		0x0000ffff		/* device removable flags */
#define RH_B_PPCM	0xffff0000		/* port power control mask */
/* roothub.a masks */
#define	RH_A_NDP	(0xff << 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	(0xff << 24)		/* power on to power good time */
/* urb */
#define N_URB_TD 48
typedef struct
{
    ed_t *ed;
    U16 length;	/* number of tds associated with this request */
    U16 td_cnt;	/* number of tds already serviced */
    int   state;
    unsigned long pipe;
    int actual_length;
    td_t *td[N_URB_TD];	/* list pointer to all corresponding TDs associated with this request */
} 
urb_priv_t;
#define URB_DEL 1
/*
 * This is the full ohci controller description
 *
 * Note how the "proper" USB information is just
 * a subset of what the full implementation needs. (Linus)
 */
typedef struct ohci 
{
    struct ohci_hcca *hcca;		/* hcca */
    /*dma_addr_t hcca_dma;*/
    int irq;
    int disabled;			/* e.g. got a UE, we're hung */
    int sleeping;
    unsigned long flags;		/* for HC bugs */
    struct ohci_regs *regs;	/* OHCI controller's memory */
    ed_t *ed_rm_list[2];     /* lists of all endpoints to be removed */
    ed_t *ed_bulktail;       /* last endpoint of bulk list */
    ed_t *ed_controltail;    /* last endpoint of control list */
    int intrstatus;
    unsigned int hc_control;		/* copy of the hc control reg */
    struct usb_device *dev[32];
    struct virt_root_hub rh;
    const char	*slot_name;
} 
ohci_t;
#define NUM_EDS 8		/* num of preallocated endpoint descriptors */
struct ohci_device 
{
    ed_t 	ed[NUM_EDS];
    int ed_cnt;
};


/* hcd */
/* endpoint */
static int ep_link(ohci_t * ohci, ed_t * ed);
static int ep_unlink(ohci_t * ohci, ed_t * ed);
static ed_t * ep_add_ed(struct usb_device * usb_dev, unsigned long pipe);
/*-------------------------------------------------------------------------*/
/* we need more TDs than EDs */
#define NUM_TD 64
/* +1 so we can align the storage */
__align(32) td_t gtd[NUM_TD+1];
/* pointers to aligned storage */
td_t *ptd;
/* TDs ... */
static __inline struct td *
td_alloc (struct usb_device *usb_dev)
{
    int i;
    struct td	*td;
    td = NULL;
    for (i = 0; i < NUM_TD; i++)
    {
        if (ptd[i].usb_dev == NULL)
        {
            td = &ptd[i];
            td->usb_dev = usb_dev;
            break;
        }
    }
    return td;
}


static __inline void
ed_free (struct ed *ed)
{
    ed->usb_dev = NULL;
}