1 files changed, 143 insertions, 0 deletions

diff --git a/include/asm-sparc/mostek_64.h b/include/asm-sparc/mostek_64.h
new file mode 100644
index 000000000000..c5652de2ace2
--- /dev/null
+++ b/include/asm-sparc/mostek_64.h
@@ -0,0 +1,143 @@
+/* mostek.h:  Describes the various Mostek time of day clock registers.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@davemloft.net)
+ * Copyright (C) 1996 Thomas K. Dyas (tdyas@eden.rutgers.edu)
+ */
+
+#ifndef _SPARC64_MOSTEK_H
+#define _SPARC64_MOSTEK_H
+
+#include <asm/idprom.h>
+
+/*       M48T02 Register Map (adapted from Sun NVRAM/Hostid FAQ)
+ *
+ *                             Data
+ * Address                                                 Function
+ *        Bit 7 Bit 6 Bit 5 Bit 4Bit 3 Bit 2 Bit 1 Bit 0
+ *   7ff  -     -     -     -    -     -     -     -       Year 00-99
+ *   7fe  0     0     0     -    -     -     -     -      Month 01-12
+ *   7fd  0     0     -     -    -     -     -     -       Date 01-31
+ *   7fc  0     FT    0     0    0     -     -     -        Day 01-07
+ *   7fb  KS    0     -     -    -     -     -     -      Hours 00-23
+ *   7fa  0     -     -     -    -     -     -     -    Minutes 00-59
+ *   7f9  ST    -     -     -    -     -     -     -    Seconds 00-59
+ *   7f8  W     R     S     -    -     -     -     -    Control
+ *
+ *   * ST is STOP BIT
+ *   * W is WRITE BIT
+ *   * R is READ BIT
+ *   * S is SIGN BIT
+ *   * FT is FREQ TEST BIT
+ *   * KS is KICK START BIT
+ */
+
+/* The Mostek 48t02 real time clock and NVRAM chip. The registers
+ * other than the control register are in binary coded decimal. Some
+ * control bits also live outside the control register.
+ *
+ * We now deal with physical addresses for I/O to the chip. -DaveM
+ */
+static inline u8 mostek_read(void __iomem *addr)
+{
+        u8 ret;
+
+        __asm__ __volatile__("lduba     [%1] %2, %0"
+                             : "=r" (ret)
+                             : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
+        return ret;
+}
+
+static inline void mostek_write(void __iomem *addr, u8 val)
+{
+        __asm__ __volatile__("stba      %0, [%1] %2"
+                             : /* no outputs */
+                             : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
+}
+
+#define MOSTEK_EEPROM           0x0000UL
+#define MOSTEK_IDPROM           0x07d8UL
+#define MOSTEK_CREG             0x07f8UL
+#define MOSTEK_SEC              0x07f9UL
+#define MOSTEK_MIN              0x07faUL
+#define MOSTEK_HOUR             0x07fbUL
+#define MOSTEK_DOW              0x07fcUL
+#define MOSTEK_DOM              0x07fdUL
+#define MOSTEK_MONTH            0x07feUL
+#define MOSTEK_YEAR             0x07ffUL
+
+extern spinlock_t mostek_lock;
+extern void __iomem *mstk48t02_regs;
+
+/* Control register values. */
+#define MSTK_CREG_WRITE 0x80    /* Must set this before placing values. */
+#define MSTK_CREG_READ  0x40    /* Stop updates to allow a clean read. */
+#define MSTK_CREG_SIGN  0x20    /* Slow/speed clock in calibration mode. */
+
+/* Control bits that live in the other registers. */
+#define MSTK_STOP       0x80    /* Stop the clock oscillator. (sec) */
+#define MSTK_KICK_START 0x80    /* Kick start the clock chip. (hour) */
+#define MSTK_FREQ_TEST  0x40    /* Frequency test mode. (day) */
+
+#define MSTK_YEAR_ZERO       1968   /* If year reg has zero, it is 1968. */
+#define MSTK_CVT_YEAR(yr)  ((yr) + MSTK_YEAR_ZERO)
+
+/* Masks that define how much space each value takes up. */
+#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_MONTH_MASK 0x1f
+#define MSTK_YEAR_MASK  0xffU
+
+/* Binary coded decimal conversion macros. */
+#define MSTK_REGVAL_TO_DECIMAL(x)  (((x) & 0x0F) + 0x0A * ((x) >> 0x04))
+#define MSTK_DECIMAL_TO_REGVAL(x)  ((((x) / 0x0A) << 0x04) + ((x) % 0x0A))
+
+/* Generic register set and get macros for internal use. */
+#define MSTK_GET(regs,name)     \
+        (MSTK_REGVAL_TO_DECIMAL(mostek_read(regs + MOSTEK_ ## name) & MSTK_ ## name ## _MASK))
+#define MSTK_SET(regs,name,value) \
+do {    u8 __val = mostek_read(regs + MOSTEK_ ## name); \
+        __val &= ~(MSTK_ ## name ## _MASK); \
+        __val |= (MSTK_DECIMAL_TO_REGVAL(value) & \
+                  (MSTK_ ## name ## _MASK)); \
+        mostek_write(regs + MOSTEK_ ## name, __val); \
+} while(0)
+
+/* 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(regs)     (mostek_read((regs) + MOSTEK_CREG))
+#define MSTK_REG_SEC(regs)      MSTK_GET(regs,SEC)
+#define MSTK_REG_MIN(regs)      MSTK_GET(regs,MIN)
+#define MSTK_REG_HOUR(regs)     MSTK_GET(regs,HOUR)
+#define MSTK_REG_DOW(regs)      MSTK_GET(regs,DOW)
+#define MSTK_REG_DOM(regs)      MSTK_GET(regs,DOM)
+#define MSTK_REG_MONTH(regs)    MSTK_GET(regs,MONTH)
+#define MSTK_REG_YEAR(regs)     MSTK_GET(regs,YEAR)
+
+#define MSTK_SET_REG_SEC(regs,value)    MSTK_SET(regs,SEC,value)
+#define MSTK_SET_REG_MIN(regs,value)    MSTK_SET(regs,MIN,value)
+#define MSTK_SET_REG_HOUR(regs,value)   MSTK_SET(regs,HOUR,value)
+#define MSTK_SET_REG_DOW(regs,value)    MSTK_SET(regs,DOW,value)
+#define MSTK_SET_REG_DOM(regs,value)    MSTK_SET(regs,DOM,value)
+#define MSTK_SET_REG_MONTH(regs,value)  MSTK_SET(regs,MONTH,value)
+#define MSTK_SET_REG_YEAR(regs,value)   MSTK_SET(regs,YEAR,value)
+
+
+/* The Mostek 48t08 clock chip. Found on Sun4m's I think. It has the
+ * same (basically) layout of the 48t02 chip except for the extra
+ * NVRAM on board (8 KB against the 48t02's 2 KB).
+ */
+#define MOSTEK_48T08_OFFSET     0x0000UL        /* Lower NVRAM portions */
+#define MOSTEK_48T08_48T02      0x1800UL        /* Offset to 48T02 chip */
+
+/* SUN5 systems usually have 48t59 model clock chipsets.  But we keep the older
+ * clock chip definitions around just in case.
+ */
+#define MOSTEK_48T59_OFFSET     0x0000UL        /* Lower NVRAM portions */
+#define MOSTEK_48T59_48T02      0x1800UL        /* Offset to 48T02 chip */
+
+#endif /* !(_SPARC64_MOSTEK_H) */