patch-2.2.18 linux/include/asm-m68k/mac_iop.h

• Lines: 163
• Date: Fri Oct 13 23:32:02 2000
• Orig file: v2.2.17/include/asm-m68k/mac_iop.h
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/include/asm-m68k/mac_iop.h linux/include/asm-m68k/mac_iop.h
@@ -0,0 +1,162 @@
+/*
+ * I/O Processor (IOP) defines and structures, mostly snagged from A/UX
+ * header files.
+ *
+ * The original header from which this was taken is copyrighted. I've done some
+ * rewriting (in fact my changes make this a bit more readable, IMHO) but some
+ * more should be done.
+ */
+
+/*
+ * This is the base address of the IOPs. Use this as the address of
+ * a "struct iop" (see below) to see where the actual registers fall.
+ */
+
+#define SCC_IOP_BASE_IIFX	(0x50F04000)
+#define ISM_IOP_BASE_IIFX	(0x50F12000)
+
+#define SCC_IOP_BASE_QUADRA	(0x50F0C000)
+#define ISM_IOP_BASE_QUADRA	(0x50F1E000)
+
+/* IOP status/control register bits: */
+
+#define	IOP_BYPASS	0x01	/* bypass-mode hardware access */
+#define	IOP_AUTOINC	0x02	/* allow autoincrement of ramhi/lo */
+#define	IOP_RUN		0x04	/* set to 0 to reset IOP chip */
+#define	IOP_IRQ		0x08	/* generate IRQ to IOP if 1 */
+#define	IOP_INT0	0x10	/* intr priority from IOP to host */
+#define	IOP_INT1	0x20	/* intr priority from IOP to host */
+#define	IOP_HWINT	0x40	/* IRQ from hardware; bypass mode only */
+#define	IOP_DMAINACTIVE	0x80	/* no DMA request active; bypass mode only */
+
+#define NUM_IOPS	2
+#define NUM_IOP_CHAN	7
+#define NUM_IOP_MSGS	NUM_IOP_CHAN*8
+#define IOP_MSG_LEN	32
+
+/* IOP reference numbers, used by the globally-visible iop_xxx functions */
+
+#define IOP_NUM_SCC	0
+#define IOP_NUM_ISM	1
+
+/* IOP channel states */
+
+#define IOP_MSG_IDLE		0       /* idle                         */
+#define IOP_MSG_NEW		1       /* new message sent             */
+#define IOP_MSG_RCVD		2       /* message received; processing */
+#define IOP_MSG_COMPLETE	3       /* message processing complete  */
+
+/* IOP message status codes */
+
+#define IOP_MSGSTATUS_UNUSED	0	/* Unusued message structure       */
+#define IOP_MSGSTATUS_WAITING	1	/* waiting for channel             */
+#define IOP_MSGSTATUS_SENT	2	/* message sent, awaiting reply    */
+#define IOP_MSGSTATUS_COMPLETE	3	/* message complete and reply rcvd */
+#define IOP_MSGSTATUS_UNSOL	6	/* message is unsolicited          */
+
+/* IOP memory addresses of the members of the the mac_iop_kernel structure. */
+
+#define IOP_ADDR_MAX_SEND_CHAN	0x0200
+#define IOP_ADDR_SEND_STATE	0x0201
+#define IOP_ADDR_PATCH_CTRL	0x021F
+#define IOP_ADDR_SEND_MSG	0x0220
+#define IOP_ADDR_MAX_RECV_CHAN	0x0300
+#define IOP_ADDR_RECV_STATE	0x0301
+#define IOP_ADDR_ALIVE		0x031F
+#define IOP_ADDR_RECV_MSG	0x0320
+
+#ifndef __ASSEMBLY__
+
+/*
+ * IOP Control registers, staggered because in usual Apple style they were
+ * too lazy to decode the A0 bit. This structure is assumed to begin at
+ * one of the xxx_IOP_BASE addresses given above.
+ */
+
+struct mac_iop {
+    __u8	ram_addr_hi;	/* shared RAM address hi byte */
+    __u8	pad0;
+    __u8	ram_addr_lo;	/* shared RAM address lo byte */
+    __u8	pad1;
+    __u8	status_ctrl;	/* status/control register */
+    __u8	pad2[3];
+    __u8	ram_data;	/* RAM data byte at ramhi/lo */
+
+    __u8	pad3[23];
+
+    /* Bypass-mode hardware access registers */
+
+    union {
+	struct {		/* SCC registers */
+	    __u8 sccb_cmd;	/* SCC B command reg */
+	    __u8 pad4;
+	    __u8 scca_cmd;	/* SCC A command reg */
+	    __u8 pad5;
+	    __u8 sccb_data;	/* SCC B data */
+	    __u8 pad6;
+	    __u8 scca_data;	/* SCC A data */
+	} scc_regs;
+
+	struct {		/* ISM registers */
+	    __u8 wdata;		/* write a data byte */
+	    __u8 pad7;
+	    __u8 wmark;		/* write a mark byte */
+	    __u8 pad8;
+	    __u8 wcrc;		/* write 2-byte crc to disk */
+	    __u8 pad9;
+	    __u8 wparams;	/* write the param regs */
+	    __u8 pad10;
+	    __u8 wphase;	/* write the phase states & dirs */
+	    __u8 pad11;
+	    __u8 wsetup;	/* write the setup register */
+	    __u8 pad12;
+	    __u8 wzeroes;	/* mode reg: 1's clr bits, 0's are x */
+	    __u8 pad13;
+	    __u8 wones;		/* mode reg: 1's set bits, 0's are x */
+	    __u8 pad14;
+	    __u8 rdata;		/* read a data byte */
+	    __u8 pad15;
+	    __u8 rmark;		/* read a mark byte */
+	    __u8 pad16;
+	    __u8 rerror;	/* read the error register */
+	    __u8 pad17;
+	    __u8 rparams;	/* read the param regs */
+	    __u8 pad18;
+	    __u8 rphase;	/* read the phase states & dirs */
+	    __u8 pad19;
+	    __u8 rsetup;	/* read the setup register */
+	    __u8 pad20;
+	    __u8 rmode;		/* read the mode register */
+	    __u8 pad21;
+	    __u8 rhandshake;	/* read the handshake register */
+	} ism_regs;
+    } b;
+};
+
+/* This structure is used to track IOP messages in the Linux kernel */
+
+struct iop_msg {
+	struct iop_msg	*next;		/* next message in queue or NULL     */
+	uint	iop_num;		/* IOP number                        */
+	uint	channel;		/* channel number                    */
+	void	*caller_priv;		/* caller private data               */
+	int	status;			/* status of this message            */
+	__u8	message[IOP_MSG_LEN];	/* the message being sent/received   */
+	__u8	reply[IOP_MSG_LEN];	/* the reply to the message          */
+	void	(*handler)(struct iop_msg *, struct pt_regs *);
+					/* function to call when reply recvd */
+};
+
+extern int iop_scc_present,iop_ism_present;
+
+extern int iop_listen(uint, uint,
+			void (*handler)(struct iop_msg *, struct pt_regs *),
+			const char *);
+extern int iop_send_message(uint, uint, void *, uint, __u8 *,
+			    void (*)(struct iop_msg *, struct pt_regs *));
+extern void iop_complete_message(struct iop_msg *);
+extern void iop_upload_code(uint, __u8 *, uint, __u16);
+extern void iop_download_code(uint, __u8 *, uint, __u16);
+extern __u8 *iop_compare_code(uint, __u8 *, uint, __u16);
+
+#endif /* __ASSEMBLY__ */