src/include/ehci.h

#ifndef EHCI_H
#define EHCI_H

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));

/* 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));

#endif