patch-1.3.4 linux/include/asm-sparc/mostek.h

• Lines: 75
• Date: Thu Jun 8 23:45:31 1995
• Orig file: v1.3.3/linux/include/asm-sparc/mostek.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.3/linux/include/asm-sparc/mostek.h linux/include/asm-sparc/mostek.h
@@ -0,0 +1,74 @@
+/* mostek.h:  Describes the various Mostek time of day clock registers.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ */
+#ifndef _SPARC_MOSTEK_H
+#define _SPARC_MOSTEK_H
+
+#include <asm/idprom.h>
+
+/* First the Mostek 48t02 clock chip.  The registers other than the
+ * control register are in binary coded decimal.
+ */
+struct mostek48t02 {
+	char eeprom[2008];            /* This is the eeprom, don't touch! */
+	struct idp_struct idprom;     /* The idprom lives here. */
+	volatile unsigned char creg;  /* Control register */
+	volatile unsigned char sec;   /* Seconds (0-59) */
+	volatile unsigned char min;   /* Minutes (0-59) */
+	volatile unsigned char hour;  /* Hour (0-23) */
+	volatile unsigned char dow;   /* Day of the week (1-7) */
+	volatile unsigned char dom;   /* Day of the month (1-31) */
+	volatile unsigned char mnth;  /* Month of year (1-12) */
+	volatile unsigned char yr;    /* Year (0-99) */
+};
+
+extern struct mostek48t02 *mstk48t02_regs;
+
+/* Control register values. */
+#define MSTK_CREG_WRITE    0x80   /* Must set this before placing values. */
+#define MSTK_CREG_READ     0x40   /* Stop the clock, I want to fetch values. */
+#define MSTK_CREG_SIGN     0x20   /* Grrr... whats this??? */
+
+#define MSTK_YR_ZERO       1968   /* If year reg has zero, it is 1968 */
+#define MSTK_CVT_YEAR(yr)  ((yr) + MSTK_YR_ZERO)
+
+/* Fun with masks. */
+#define MSTK_SEC_MASK      0x7f
+#define MSTK_MIN_MASK      0x7f
+#define MSTK_HOUR_MASK     0x3f
+#define MSTK_DOW_MASK      0x07
+#define MSTK_DOM_MASK      0x3f
+#define MSTK_MNTH_MASK     0x1f
+#define MSTK_YR_MASK       0xff
+
+/* Conversion routines. */
+#define MSTK_REGVAL_TO_DECIMAL(x)  (((x) & 0xf) + 0xa * ((x) >> 0x4))
+#define MSTK_DECIMAL_TO_REGVAL(x)  ((((x) / 0xa) << 0x4) + ((x) % 0xa))
+
+/* Macros to make register access easier on our fingers. These give you
+ * the decimal value of the register requested if applicable.  You pass
+ * the a pointer to a 'struct mostek48t02'.
+ */
+#define MSTK_REG_CREG(ptr)  (ptr->creg)
+#define MSTK_REG_SEC(ptr)   (MSTK_REGVAL_TO_DECIMAL((ptr->sec & MSTK_SEC_MASK)))
+#define MSTK_REG_MIN(ptr)   (MSTK_REGVAL_TO_DECIMAL((ptr->min & MSTK_MIN_MASK)))
+#define MSTK_REG_HOUR(ptr)  (MSTK_REGVAL_TO_DECIMAL((ptr->hour & MSTK_HOUR_MASK)))
+#define MSTK_REG_DOW(ptr)   (MSTK_REGVAL_TO_DECIMAL((ptr->dow & MSTK_DOW_MASK)))
+#define MSTK_REG_DOM(ptr)   (MSTK_REGVAL_TO_DECIMAL((ptr->dom & MSTK_DOM_MASK)))
+#define MSTK_REG_MNTH(ptr)  (MSTK_REGVAL_TO_DECIMAL((ptr->mnth & MSTK_MNTH_MASK)))
+#define MSTK_REG_YR(ptr)    (MSTK_REGVAL_TO_DECIMAL((ptr->yr & MSTK_YR_MASK)))
+
+/* The Mostek 48t02 clock chip.  Found on Sun4m's I think.  It has the
+ * same (basically) layout of the 48t02 chip.
+ */
+struct mostek48t08 {
+	char offset[6*1024];         /* Magic things may be here, who knows? */
+	struct mostek48t02 regs;     /* Here is what we are interested in.   */
+};
+extern struct mostek48t08 *mstk48t08_regs;
+
+enum sparc_clock_type {	MSTK48T02, MSTK48T08, MSTK_INVALID };
+extern enum sparc_clock_type sp_clock_typ;
+
+#endif /* !(_SPARC_MOSTEK_H) */