patch-2.1.87 linux/arch/m68k/mac/via6522.h

• Lines: 112
• Date: Thu Feb 12 16:30:13 1998
• Orig file: v2.1.86/linux/arch/m68k/mac/via6522.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.86/linux/arch/m68k/mac/via6522.h linux/arch/m68k/mac/via6522.h
@@ -0,0 +1,111 @@
+/*
+ *	6522 Versatile Interface Adapter (VIA)
+ *
+ *	There are two of these on the Mac II. Some IRQ's are vectored
+ *	via them as are assorted bits and bobs - eg rtc, adb. The picture
+ *	is a bit incomplete as the Mac documentation doesnt cover this well
+ */
+ 
+#define VIABASE		0x50F00000
+#define VIABASE2	0x50F02000
+
+/*
+ *	Not all of these are true post MacII I think
+ */
+ 
+#define VIA1A_vSccWrReq	0x80	/* SCC write */
+#define VIA1A_vRev8	0x40	/* Revision 8 board ??? */
+#define VIA1A_vHeadSel	0x20	/* Head select for IWM */
+#define VIA1A_vOverlay	0x10
+#define VIA1A_vSync	0x08
+#define VIA1A_vVolume	0x07	/* Audio volume mask */
+	
+#define VIA1B_vSound	0x80	/* Audio on/off */
+#define VIA1B_vMystery	0x40
+#define VIA1B_vADBS2	0x20	/* ADB state 2 */
+#define VIA1B_vADBS1	0x10	/* ADB state 1 */
+#define VIA1B_vADBInt	0x08	/* ADB interrupt */
+#define VIA1B_vRTCEnb	0x04	/* Real time clock */
+#define VIA1B_vRTCClk	0x02
+#define VIA1B_vRTCData	0x01
+
+/*
+ *	VIA2 A register is the interrupt lines raised off the nubus 
+ *	slots.
+ */
+ 
+#define VIA2A_vIRQE	0x20
+#define VIA2A_vIRQD	0x10
+#define VIA2A_vIRQC	0x08
+#define VIA2A_vIRQB	0x04
+#define VIA2A_vIRQA	0x02
+#define VIA2A_vIRQ9	0x01
+
+/*
+ *	Register B has the fun stuff in it
+ */
+
+#define VIA2B_vPower	0x04	/* Off switch */
+#define VIA2B_vBusLk	0x02
+#define VIA2B_vCDis	0x01
+
+extern __inline__ void via_write(volatile unsigned char *via,int reg, int v)
+{
+	via[reg]=v;
+}
+
+extern __inline__ int via_read(volatile unsigned char *via,int reg)
+{
+	return (int)via[reg];
+}
+
+extern volatile unsigned char *via1,*via2;
+
+/*
+ *	6522 registers - see databook
+ */
+ 
+#define vBufB	0x0000
+#define vBufA	0x0200
+#define vDirB	0x0400
+#define vDirA	0x0600
+#define vT1CL	0x0800
+#define vT1CH	0x0a00
+#define vT1LL	0x0c00
+#define vT1LH	0x0e00
+#define vT2CL	0x1000
+#define vT2CH	0x1200
+#define vSR	0x1400
+#define vACR	0x1600
+#define vPCR	0x1800
+#define vIFR	0x1a00
+#define vIER	0x1c00 
+#define vANH	0x1e00  /* register A (no shake) */
+
+#define rBufB	0x00
+#define rBufA	0x02
+/*#define rIFR	0x03*/
+#define rIFR	0x1A03
+#define rVideo	0x10
+#define rSlot	0x12
+/*#define rIER	0x13*/
+#define rIER	0x1C13
+/*
+#define R_rIFR	0x03
+#define R_rIER	0x13
+#define W_rIFR	0x1A03
+#define W_rIER	0x1C13
+*/
+/*
+ *	VIA interrupt
+ */
+ 
+struct via_irq_tab
+{
+	void (*vector[8])(int, void *, struct pt_regs *);
+};
+
+extern void via1_irq(int, void *, struct pt_regs *);
+extern void via2_irq(int, void *, struct pt_regs *);
+
+extern void via_setup_keyboard(void);