LXR linux/arch/m68k/include/asm/mac

   1/*
   2 * I/O Processor (IOP) defines and structures, mostly snagged from A/UX
   3 * header files.
   4 *
   5 * The original header from which this was taken is copyrighted. I've done some
   6 * rewriting (in fact my changes make this a bit more readable, IMHO) but some
   7 * more should be done.
   8 */
   9
  10/*
  11 * This is the base address of the IOPs. Use this as the address of
  12 * a "struct iop" (see below) to see where the actual registers fall.
  13 */
  14
  15#define SCC_IOP_BASE_IIFX       (0x50F04000)
  16#define ISM_IOP_BASE_IIFX       (0x50F12000)
  17
  18#define SCC_IOP_BASE_QUADRA     (0x50F0C000)
  19#define ISM_IOP_BASE_QUADRA     (0x50F1E000)
  20
  21/* IOP status/control register bits: */
  22
  23#define IOP_BYPASS      0x01    /* bypass-mode hardware access */
  24#define IOP_AUTOINC     0x02    /* allow autoincrement of ramhi/lo */
  25#define IOP_RUN         0x04    /* set to 0 to reset IOP chip */
  26#define IOP_IRQ         0x08    /* generate IRQ to IOP if 1 */
  27#define IOP_INT0        0x10    /* intr priority from IOP to host */
  28#define IOP_INT1        0x20    /* intr priority from IOP to host */
  29#define IOP_HWINT       0x40    /* IRQ from hardware; bypass mode only */
  30#define IOP_DMAINACTIVE 0x80    /* no DMA request active; bypass mode only */
  31
  32#define NUM_IOPS        2
  33#define NUM_IOP_CHAN    7
  34#define NUM_IOP_MSGS    NUM_IOP_CHAN*8
  35#define IOP_MSG_LEN     32
  36
  37/* IOP reference numbers, used by the globally-visible iop_xxx functions */
  38
  39#define IOP_NUM_SCC     0
  40#define IOP_NUM_ISM     1
  41
  42/* IOP channel states */
  43
  44#define IOP_MSG_IDLE            0       /* idle                         */
  45#define IOP_MSG_NEW             1       /* new message sent             */
  46#define IOP_MSG_RCVD            2       /* message received; processing */
  47#define IOP_MSG_COMPLETE        3       /* message processing complete  */
  48
  49/* IOP message status codes */
  50
  51#define IOP_MSGSTATUS_UNUSED    0       /* Unusued message structure       */
  52#define IOP_MSGSTATUS_WAITING   1       /* waiting for channel             */
  53#define IOP_MSGSTATUS_SENT      2       /* message sent, awaiting reply    */
  54#define IOP_MSGSTATUS_COMPLETE  3       /* message complete and reply rcvd */
  55#define IOP_MSGSTATUS_UNSOL     6       /* message is unsolicited          */
  56
  57/* IOP memory addresses of the members of the mac_iop_kernel structure. */
  58
  59#define IOP_ADDR_MAX_SEND_CHAN  0x0200
  60#define IOP_ADDR_SEND_STATE     0x0201
  61#define IOP_ADDR_PATCH_CTRL     0x021F
  62#define IOP_ADDR_SEND_MSG       0x0220
  63#define IOP_ADDR_MAX_RECV_CHAN  0x0300
  64#define IOP_ADDR_RECV_STATE     0x0301
  65#define IOP_ADDR_ALIVE          0x031F
  66#define IOP_ADDR_RECV_MSG       0x0320
  67
  68#ifndef __ASSEMBLY__
  69
  70/*
  71 * IOP Control registers, staggered because in usual Apple style they were
  72 * too lazy to decode the A0 bit. This structure is assumed to begin at
  73 * one of the xxx_IOP_BASE addresses given above.
  74 */
  75
  76struct mac_iop {
  77    __u8        ram_addr_hi;    /* shared RAM address hi byte */
  78    __u8        pad0;
  79    __u8        ram_addr_lo;    /* shared RAM address lo byte */
  80    __u8        pad1;
  81    __u8        status_ctrl;    /* status/control register */
  82    __u8        pad2[3];
  83    __u8        ram_data;       /* RAM data byte at ramhi/lo */
  84
  85    __u8        pad3[23];
  86
  87    /* Bypass-mode hardware access registers */
  88
  89    union {
  90        struct {                /* SCC registers */
  91            __u8 sccb_cmd;      /* SCC B command reg */
  92            __u8 pad4;
  93            __u8 scca_cmd;      /* SCC A command reg */
  94            __u8 pad5;
  95            __u8 sccb_data;     /* SCC B data */
  96            __u8 pad6;
  97            __u8 scca_data;     /* SCC A data */
  98        } scc_regs;
  99
 100        struct {                /* ISM registers */
 101            __u8 wdata;         /* write a data byte */
 102            __u8 pad7;
 103            __u8 wmark;         /* write a mark byte */
 104            __u8 pad8;
 105            __u8 wcrc;          /* write 2-byte crc to disk */
 106            __u8 pad9;
 107            __u8 wparams;       /* write the param regs */
 108            __u8 pad10;
 109            __u8 wphase;        /* write the phase states & dirs */
 110            __u8 pad11;
 111            __u8 wsetup;        /* write the setup register */
 112            __u8 pad12;
 113            __u8 wzeroes;       /* mode reg: 1's clr bits, 0's are x */
 114            __u8 pad13;
 115            __u8 wones;         /* mode reg: 1's set bits, 0's are x */
 116            __u8 pad14;
 117            __u8 rdata;         /* read a data byte */
 118            __u8 pad15;
 119            __u8 rmark;         /* read a mark byte */
 120            __u8 pad16;
 121            __u8 rerror;        /* read the error register */
 122            __u8 pad17;
 123            __u8 rparams;       /* read the param regs */
 124            __u8 pad18;
 125            __u8 rphase;        /* read the phase states & dirs */
 126            __u8 pad19;
 127            __u8 rsetup;        /* read the setup register */
 128            __u8 pad20;
 129            __u8 rmode;         /* read the mode register */
 130            __u8 pad21;
 131            __u8 rhandshake;    /* read the handshake register */
 132        } ism_regs;
 133    } b;
 134};
 135
 136/* This structure is used to track IOP messages in the Linux kernel */
 137
 138struct iop_msg {
 139        struct iop_msg  *next;          /* next message in queue or NULL     */
 140        uint    iop_num;                /* IOP number                        */
 141        uint    channel;                /* channel number                    */
 142        void    *caller_priv;           /* caller private data               */
 143        int     status;                 /* status of this message            */
 144        __u8    message[IOP_MSG_LEN];   /* the message being sent/received   */
 145        __u8    reply[IOP_MSG_LEN];     /* the reply to the message          */
 146        void    (*handler)(struct iop_msg *);
 147                                        /* function to call when reply recvd */
 148};
 149
 150extern int iop_scc_present,iop_ism_present;
 151
 152extern int iop_listen(uint, uint,
 153                        void (*handler)(struct iop_msg *),
 154                        const char *);
 155extern int iop_send_message(uint, uint, void *, uint, __u8 *,
 156                            void (*)(struct iop_msg *));
 157extern void iop_complete_message(struct iop_msg *);
 158extern void iop_upload_code(uint, __u8 *, uint, __u16);
 159extern void iop_download_code(uint, __u8 *, uint, __u16);
 160extern __u8 *iop_compare_code(uint, __u8 *, uint, __u16);
 161
 162#endif /* __ASSEMBLY__ */
 163