PPC32: Update the TODC code from 2.4.

arch/ppc/syslib/todc_time.c

@@ -50,6 +50,8 @@
  * 	 					--MAG
  */
 
+extern spinlock_t	rtc_lock;
+
 /*
  * 'todc_info' should be initialized in your *_setup.c file to
  * point to a fully initialized 'todc_info_t' structure.
@@ -126,6 +128,54 @@ todc_mc146818_write_val(int addr, unsigned char val)
 	return;
 }
 
+
+/*
+ * Routines to make RTC chips with NVRAM buried behind an addr/data pair
+ * have the NVRAM and clock regs appear at the same level.
+ * The NVRAM will appear to start at addr 0 and the clock regs will appear
+ * to start immediately after the NVRAM (actually, start at offset
+ * todc_info->nvram_size).
+ */
+static inline u_char
+todc_read_val(int addr)
+{
+	u_char	val;
+
+	if (todc_info->sw_flags & TODC_FLAG_2_LEVEL_NVRAM) {
+		if (addr < todc_info->nvram_size) { /* NVRAM */
+			ppc_md.nvram_write_val(todc_info->nvram_addr_reg, addr);
+			val = ppc_md.nvram_read_val(todc_info->nvram_data_reg);
+		}
+		else { /* Clock Reg */
+			addr -= todc_info->nvram_size;
+			val = ppc_md.nvram_read_val(addr);
+		}
+	}
+	else {
+		val = ppc_md.nvram_read_val(addr);
+	}
+
+	return val;
+}
+
+static inline void
+todc_write_val(int addr, u_char val)
+{
+	if (todc_info->sw_flags & TODC_FLAG_2_LEVEL_NVRAM) {
+		if (addr < todc_info->nvram_size) { /* NVRAM */
+			ppc_md.nvram_write_val(todc_info->nvram_addr_reg, addr);
+			ppc_md.nvram_write_val(todc_info->nvram_data_reg, val);
+		}
+		else { /* Clock Reg */
+			addr -= todc_info->nvram_size;
+			ppc_md.nvram_write_val(addr, val);
+		}
+	}
+	else {
+		ppc_md.nvram_write_val(addr, val);
+	}
+}
+
 /*
  * TODC routines
  *
@@ -148,7 +198,7 @@ todc_time_init(void)
 	if (not_initialized) {
 		u_char	cntl_b;
 
-		cntl_b = ppc_md.nvram_read_val(todc_info->control_b);
+		cntl_b = todc_read_val(todc_info->control_b);
 
 		if (todc_info->rtc_type == TODC_TYPE_MC146818) {
 			if ((cntl_b & 0x70) != 0x20) {
@@ -159,7 +209,18 @@ todc_time_init(void)
 				cntl_b |= 0x20;
 			}
 
-			ppc_md.nvram_write_val(todc_info->control_b, cntl_b);
+			todc_write_val(todc_info->control_b, cntl_b);
+		}
+		else if (todc_info->rtc_type == TODC_TYPE_DS17285) {
+			u_char mode;
+
+			mode = todc_read_val(TODC_TYPE_DS17285_CNTL_A);
+			/* Make sure countdown clear is not set */
+			mode &= ~0x40;
+			/* Enable oscillator, extended register set */
+			mode |= 0x30;
+			todc_write_val(TODC_TYPE_DS17285_CNTL_A, mode);
+
 		}
 		else if (todc_info->rtc_type == TODC_TYPE_DS1501) {
 			u_char	month;
@@ -167,18 +228,18 @@ todc_time_init(void)
 			todc_info->enable_read = TODC_DS1501_CNTL_B_TE;
 			todc_info->enable_write = TODC_DS1501_CNTL_B_TE;
 
-			month = ppc_md.nvram_read_val(todc_info->month);
+			month = todc_read_val(todc_info->month);
 
 			if ((month & 0x80) == 0x80) {
 				printk(KERN_INFO "TODC %s %s\n",
 					"real-time-clock was stopped.",
 					"Now starting...");
 				month &= ~0x80;
-				ppc_md.nvram_write_val(todc_info->month, month);
+				todc_write_val(todc_info->month, month);
 			}
 
 			cntl_b &= ~TODC_DS1501_CNTL_B_TE;
-			ppc_md.nvram_write_val(todc_info->control_b, cntl_b);
+			todc_write_val(todc_info->control_b, cntl_b);
 		}
 		else { /* must be a m48txx type */
 			u_char	cntl_a;
@@ -186,7 +247,7 @@ todc_time_init(void)
 			todc_info->enable_read = TODC_MK48TXX_CNTL_A_R;
 			todc_info->enable_write = TODC_MK48TXX_CNTL_A_W;
 
-			cntl_a = ppc_md.nvram_read_val(todc_info->control_a);
+			cntl_a = todc_read_val(todc_info->control_a);
 
 			/* Check & clear STOP bit in control B register */
 			if (cntl_b & TODC_MK48TXX_DAY_CB) {
@@ -197,16 +258,14 @@ todc_time_init(void)
 				cntl_a |= todc_info->enable_write;
 				cntl_b &= ~TODC_MK48TXX_DAY_CB;/* Start Oscil */
 
-				ppc_md.nvram_write_val(todc_info->control_a,
-						       cntl_a);
-				ppc_md.nvram_write_val(todc_info->control_b,
-						       cntl_b);
+				todc_write_val(todc_info->control_a, cntl_a);
+				todc_write_val(todc_info->control_b, cntl_b);
 			}
 
 			/* Make sure READ & WRITE bits are cleared. */
 			cntl_a &= ~(todc_info->enable_write |
 				    todc_info->enable_read);
-			ppc_md.nvram_write_val(todc_info->control_a, cntl_a);
+			todc_write_val(todc_info->control_a, cntl_a);
 		}
 
 		not_initialized = 0;
@@ -231,7 +290,8 @@ todc_get_rtc_time(void)
 	uint	limit, i;
 	u_char	save_control, uip;
 
-	save_control = ppc_md.nvram_read_val(todc_info->control_a);
+	spin_lock(&rtc_lock);
+	save_control = todc_read_val(todc_info->control_a);
 
 	if (todc_info->rtc_type != TODC_TYPE_MC146818) {
 		limit = 1;
@@ -241,9 +301,10 @@ todc_get_rtc_time(void)
 			case TODC_TYPE_DS1743:
 			case TODC_TYPE_DS1746:	/* XXXX BAD HACK -> FIX */
 			case TODC_TYPE_DS1747:
+			case TODC_TYPE_DS17285:
 				break;
 			default:
-				ppc_md.nvram_write_val(todc_info->control_a,
+				todc_write_val(todc_info->control_a,
 				       (save_control | todc_info->enable_read));
 		}
 	}
@@ -253,19 +314,18 @@ todc_get_rtc_time(void)
 
 	for (i=0; i<limit; i++) {
 		if (todc_info->rtc_type == TODC_TYPE_MC146818) {
-			uip = ppc_md.nvram_read_val(todc_info->RTC_FREQ_SELECT);
+			uip = todc_read_val(todc_info->RTC_FREQ_SELECT);
 		}
 
-		sec = ppc_md.nvram_read_val(todc_info->seconds) & 0x7f;
-		min = ppc_md.nvram_read_val(todc_info->minutes) & 0x7f;
-		hour = ppc_md.nvram_read_val(todc_info->hours) & 0x3f;
-		day = ppc_md.nvram_read_val(todc_info->day_of_month) & 0x3f;
-		mon = ppc_md.nvram_read_val(todc_info->month) & 0x1f;
-		year = ppc_md.nvram_read_val(todc_info->year) & 0xff;
+		sec = todc_read_val(todc_info->seconds) & 0x7f;
+		min = todc_read_val(todc_info->minutes) & 0x7f;
+		hour = todc_read_val(todc_info->hours) & 0x3f;
+		day = todc_read_val(todc_info->day_of_month) & 0x3f;
+		mon = todc_read_val(todc_info->month) & 0x1f;
+		year = todc_read_val(todc_info->year) & 0xff;
 
 		if (todc_info->rtc_type == TODC_TYPE_MC146818) {
-			uip |= ppc_md.nvram_read_val(
-					todc_info->RTC_FREQ_SELECT);
+			uip |= todc_read_val(todc_info->RTC_FREQ_SELECT);
 			if ((uip & RTC_UIP) == 0) break;
 		}
 	}
@@ -276,13 +336,15 @@ todc_get_rtc_time(void)
 			case TODC_TYPE_DS1743:
 			case TODC_TYPE_DS1746:	/* XXXX BAD HACK -> FIX */
 			case TODC_TYPE_DS1747:
+			case TODC_TYPE_DS17285:
 				break;
 			default:
 				save_control &= ~(todc_info->enable_read);
-				ppc_md.nvram_write_val(todc_info->control_a,
+				todc_write_val(todc_info->control_a,
 						       save_control);
 		}
 	}
+	spin_unlock(&rtc_lock);
 
 	if ((todc_info->rtc_type != TODC_TYPE_MC146818) ||
 	    ((save_control & RTC_DM_BINARY) == 0) ||
@@ -310,19 +372,19 @@ todc_set_rtc_time(unsigned long nowtime)
 	struct rtc_time	tm;
 	u_char		save_control, save_freq_select;
 
+	spin_lock(&rtc_lock);
 	to_tm(nowtime, &tm);
 
-	save_control = ppc_md.nvram_read_val(todc_info->control_a);
+	save_control = todc_read_val(todc_info->control_a);
 
 	/* Assuming MK48T59_RTC_CA_WRITE & RTC_SET are equal */
-	ppc_md.nvram_write_val(todc_info->control_a,
+	todc_write_val(todc_info->control_a,
 			       (save_control | todc_info->enable_write));
 	save_control &= ~(todc_info->enable_write); /* in case it was set */
 
 	if (todc_info->rtc_type == TODC_TYPE_MC146818) {
-		save_freq_select =
-			ppc_md.nvram_read_val(todc_info->RTC_FREQ_SELECT);
-		ppc_md.nvram_write_val(todc_info->RTC_FREQ_SELECT,
+		save_freq_select = todc_read_val(todc_info->RTC_FREQ_SELECT);
+		todc_write_val(todc_info->RTC_FREQ_SELECT,
 				       save_freq_select | RTC_DIV_RESET2);
 	}
 
@@ -341,19 +403,19 @@ todc_set_rtc_time(unsigned long nowtime)
 		BIN_TO_BCD(tm.tm_year);
 	}
 
-	ppc_md.nvram_write_val(todc_info->seconds,      tm.tm_sec);
-	ppc_md.nvram_write_val(todc_info->minutes,      tm.tm_min);
-	ppc_md.nvram_write_val(todc_info->hours,        tm.tm_hour);
-	ppc_md.nvram_write_val(todc_info->month,        tm.tm_mon);
-	ppc_md.nvram_write_val(todc_info->day_of_month, tm.tm_mday);
-	ppc_md.nvram_write_val(todc_info->year,         tm.tm_year);
+	todc_write_val(todc_info->seconds,      tm.tm_sec);
+	todc_write_val(todc_info->minutes,      tm.tm_min);
+	todc_write_val(todc_info->hours,        tm.tm_hour);
+	todc_write_val(todc_info->month,        tm.tm_mon);
+	todc_write_val(todc_info->day_of_month, tm.tm_mday);
+	todc_write_val(todc_info->year,         tm.tm_year);
 
-	ppc_md.nvram_write_val(todc_info->control_a, save_control);
+	todc_write_val(todc_info->control_a, save_control);
 
 	if (todc_info->rtc_type == TODC_TYPE_MC146818) {
-		ppc_md.nvram_write_val(todc_info->RTC_FREQ_SELECT,
-				       save_freq_select);
+		todc_write_val(todc_info->RTC_FREQ_SELECT, save_freq_select);
 	}
+	spin_unlock(&rtc_lock);
 
 	return 0;
 }
@@ -367,30 +429,28 @@ static unsigned char __init todc_read_timereg(int addr)
 
 	switch (todc_info->rtc_type) {
 		case TODC_TYPE_DS1557:
-		case TODC_TYPE_DS1743:
 		case TODC_TYPE_DS1746:	/* XXXX BAD HACK -> FIX */
 		case TODC_TYPE_DS1747:
+		case TODC_TYPE_DS17285:
 		case TODC_TYPE_MC146818:
 			break;
 		default:
-			save_control =
-				ppc_md.nvram_read_val(todc_info->control_a);
-			ppc_md.nvram_write_val(todc_info->control_a,
+			save_control = todc_read_val(todc_info->control_a);
+			todc_write_val(todc_info->control_a,
 				       (save_control | todc_info->enable_read));
 	}
-	val = ppc_md.nvram_read_val(addr);
+	val = todc_read_val(addr);
 
 	switch (todc_info->rtc_type) {
 		case TODC_TYPE_DS1557:
-		case TODC_TYPE_DS1743:
 		case TODC_TYPE_DS1746:	/* XXXX BAD HACK -> FIX */
 		case TODC_TYPE_DS1747:
+		case TODC_TYPE_DS17285:
 		case TODC_TYPE_MC146818:
 			break;
 		default:
 			save_control &= ~(todc_info->enable_read);
-			ppc_md.nvram_write_val(todc_info->control_a,
-					       save_control);
+			todc_write_val(todc_info->control_a, save_control);
 	}
 
 	return val;
@@ -412,7 +472,7 @@ todc_calibrate_decr(void)
 
 	/*
 	 * Actually this is bad for precision, we should have a loop in
-	 * which we only read the seconds counter. nvram_read_val writes
+	 * which we only read the seconds counter. todc_read_val writes
 	 * the address bytes on every call and this takes a lot of time.
 	 * Perhaps an nvram_wait_change method returning a time
 	 * stamp with a loop count as parameter would be the solution.

include/asm-ppc/todc.h

@@ -46,6 +46,9 @@ typedef struct {
 	 */
 	int as0_bits;
 
+	int nvram_size;	/* Size of NVRAM on chip */
+	int sw_flags;	/* Software control flags */
+
 	/* Following are the register offsets for the particular chip */
 	int year;
 	int month;
@@ -64,6 +67,14 @@ typedef struct {
 	int alarm_seconds;
 	int century;
 	int flags;
+
+	/*
+	 * Some RTC chips have their NVRAM buried behind a addr/data pair of
+	 * regs on the first level/clock registers.  The following fields
+	 * are the addresses for those addr/data regs.
+	 */
+	int nvram_addr_reg;
+	int nvram_data_reg;
 } todc_info_t;
 
 /*
@@ -86,7 +97,8 @@ typedef struct {
 #define TODC_TYPE_DS1643		9	/* Dallas DS1643 RTC */
 #define TODC_TYPE_PC97307		10	/* PC97307 internal RTC */
 #define TODC_TYPE_DS1557		11	/* Dallas DS1557 RTC */
-#define	TODC_TYPE_MC146818		100	/* Leave room for more m48txx's */
+#define TODC_TYPE_DS17285		12	/* Dallas DS17285 RTC */
+#define	TODC_TYPE_MC146818		100	/* Leave room for m48txx's */
 
 /*
  * Bit to clear/set to enable reads/writes to the chip
@@ -97,10 +109,19 @@ typedef struct {
 
 #define	TODC_DS1501_CNTL_B_TE		0x80
 
+/*
+ * Define flag bits used by todc routines.
+ */
+#define	TODC_FLAG_2_LEVEL_NVRAM		0x00000001
+
 /*
  * Define the values for the various RTC's that should to into the todc_info
  * table.
+ * Note: The XXX_NVRAM_SIZE, XXX_NVRAM_ADDR_REG, and XXX_NVRAM_DATA_REG only
+ * matter if XXX_SW_FLAGS has TODC_FLAG_2_LEVEL_NVRAM set.
  */
+#define	TODC_TYPE_MK48T35_NVRAM_SIZE		0x7ff8
+#define	TODC_TYPE_MK48T35_SW_FLAGS		0
 #define	TODC_TYPE_MK48T35_YEAR			0x7fff
 #define	TODC_TYPE_MK48T35_MONTH			0x7ffe
 #define	TODC_TYPE_MK48T35_DOM			0x7ffd	/* Day of Month */
@@ -118,7 +139,11 @@ typedef struct {
 #define	TODC_TYPE_MK48T35_ALARM_SECONDS		0x0000
 #define	TODC_TYPE_MK48T35_CENTURY		0x0000
 #define	TODC_TYPE_MK48T35_FLAGS			0x0000
+#define	TODC_TYPE_MK48T35_NVRAM_ADDR_REG	0
+#define	TODC_TYPE_MK48T35_NVRAM_DATA_REG	0
 
+#define	TODC_TYPE_MK48T37_NVRAM_SIZE		0x7ff0
+#define	TODC_TYPE_MK48T37_SW_FLAGS		0
 #define	TODC_TYPE_MK48T37_YEAR			0x7fff
 #define	TODC_TYPE_MK48T37_MONTH			0x7ffe
 #define	TODC_TYPE_MK48T37_DOM			0x7ffd	/* Day of Month */
@@ -136,7 +161,11 @@ typedef struct {
 #define	TODC_TYPE_MK48T37_ALARM_SECONDS		0x7ff2
 #define	TODC_TYPE_MK48T37_CENTURY		0x7ff1
 #define	TODC_TYPE_MK48T37_FLAGS			0x7ff0
+#define	TODC_TYPE_MK48T37_NVRAM_ADDR_REG	0
+#define	TODC_TYPE_MK48T37_NVRAM_DATA_REG	0
 
+#define	TODC_TYPE_MK48T59_NVRAM_SIZE		0x1ff0
+#define	TODC_TYPE_MK48T59_SW_FLAGS		0
 #define	TODC_TYPE_MK48T59_YEAR			0x1fff
 #define	TODC_TYPE_MK48T59_MONTH			0x1ffe
 #define	TODC_TYPE_MK48T59_DOM			0x1ffd	/* Day of Month */
@@ -154,25 +183,33 @@ typedef struct {
 #define	TODC_TYPE_MK48T59_ALARM_SECONDS		0x1fff
 #define	TODC_TYPE_MK48T59_CENTURY		0x1fff
 #define	TODC_TYPE_MK48T59_FLAGS			0x1fff
+#define	TODC_TYPE_MK48T59_NVRAM_ADDR_REG	0
+#define	TODC_TYPE_MK48T59_NVRAM_DATA_REG	0
 
-#define	TODC_TYPE_DS1501_YEAR			0x06
-#define	TODC_TYPE_DS1501_MONTH			0x05
-#define	TODC_TYPE_DS1501_DOM			0x04	/* Day of Month */
-#define	TODC_TYPE_DS1501_DOW			0x03	/* Day of Week */
-#define	TODC_TYPE_DS1501_HOURS			0x02
-#define	TODC_TYPE_DS1501_MINUTES		0x01
-#define	TODC_TYPE_DS1501_SECONDS		0x00
-#define	TODC_TYPE_DS1501_CNTL_B			0x0f
-#define	TODC_TYPE_DS1501_CNTL_A			0x0f
-#define	TODC_TYPE_DS1501_WATCHDOG		0xff
-#define	TODC_TYPE_DS1501_INTERRUPTS		0xff
-#define	TODC_TYPE_DS1501_ALARM_DATE		0x0b
-#define	TODC_TYPE_DS1501_ALARM_HOUR		0x0a
-#define	TODC_TYPE_DS1501_ALARM_MINUTES		0x09
-#define	TODC_TYPE_DS1501_ALARM_SECONDS		0x08
-#define	TODC_TYPE_DS1501_CENTURY		0x07
-#define	TODC_TYPE_DS1501_FLAGS			0xff
+#define	TODC_TYPE_DS1501_NVRAM_SIZE	0x100
+#define	TODC_TYPE_DS1501_SW_FLAGS	TODC_FLAG_2_LEVEL_NVRAM
+#define	TODC_TYPE_DS1501_YEAR		(TODC_TYPE_DS1501_NVRAM_SIZE + 0x06)
+#define	TODC_TYPE_DS1501_MONTH		(TODC_TYPE_DS1501_NVRAM_SIZE + 0x05)
+#define	TODC_TYPE_DS1501_DOM		(TODC_TYPE_DS1501_NVRAM_SIZE + 0x04)
+#define	TODC_TYPE_DS1501_DOW		(TODC_TYPE_DS1501_NVRAM_SIZE + 0x03)
+#define	TODC_TYPE_DS1501_HOURS		(TODC_TYPE_DS1501_NVRAM_SIZE + 0x02)
+#define	TODC_TYPE_DS1501_MINUTES	(TODC_TYPE_DS1501_NVRAM_SIZE + 0x01)
+#define	TODC_TYPE_DS1501_SECONDS	(TODC_TYPE_DS1501_NVRAM_SIZE + 0x00)
+#define	TODC_TYPE_DS1501_CNTL_B		(TODC_TYPE_DS1501_NVRAM_SIZE + 0x0f)
+#define	TODC_TYPE_DS1501_CNTL_A		(TODC_TYPE_DS1501_NVRAM_SIZE + 0x0f)
+#define	TODC_TYPE_DS1501_WATCHDOG	(TODC_TYPE_DS1501_NVRAM_SIZE + 0xff)
+#define	TODC_TYPE_DS1501_INTERRUPTS	(TODC_TYPE_DS1501_NVRAM_SIZE + 0xff)
+#define	TODC_TYPE_DS1501_ALARM_DATE	(TODC_TYPE_DS1501_NVRAM_SIZE + 0x0b)
+#define	TODC_TYPE_DS1501_ALARM_HOUR	(TODC_TYPE_DS1501_NVRAM_SIZE + 0x0a)
+#define	TODC_TYPE_DS1501_ALARM_MINUTES	(TODC_TYPE_DS1501_NVRAM_SIZE + 0x09)
+#define	TODC_TYPE_DS1501_ALARM_SECONDS	(TODC_TYPE_DS1501_NVRAM_SIZE + 0x08)
+#define	TODC_TYPE_DS1501_CENTURY	(TODC_TYPE_DS1501_NVRAM_SIZE + 0x07)
+#define	TODC_TYPE_DS1501_FLAGS		(TODC_TYPE_DS1501_NVRAM_SIZE + 0xff)
+#define	TODC_TYPE_DS1501_NVRAM_ADDR_REG	0x10
+#define	TODC_TYPE_DS1501_NVRAM_DATA_REG	0x13
 
+#define	TODC_TYPE_DS1557_NVRAM_SIZE		0x7fff0
+#define	TODC_TYPE_DS1557_SW_FLAGS		0
 #define	TODC_TYPE_DS1557_YEAR			0x7ffff
 #define	TODC_TYPE_DS1557_MONTH			0x7fffe
 #define	TODC_TYPE_DS1557_DOM			0x7fffd	/* Day of Month */
@@ -190,7 +227,11 @@ typedef struct {
 #define	TODC_TYPE_DS1557_ALARM_SECONDS		0x7fff2
 #define	TODC_TYPE_DS1557_CENTURY		0x7fff8
 #define	TODC_TYPE_DS1557_FLAGS			0x7fff0
+#define	TODC_TYPE_DS1557_NVRAM_ADDR_REG		0
+#define	TODC_TYPE_DS1557_NVRAM_DATA_REG		0
 
+#define	TODC_TYPE_DS1643_NVRAM_SIZE		0x1ff8
+#define	TODC_TYPE_DS1643_SW_FLAGS		0
 #define	TODC_TYPE_DS1643_YEAR			0x1fff
 #define	TODC_TYPE_DS1643_MONTH			0x1ffe
 #define	TODC_TYPE_DS1643_DOM			0x1ffd	/* Day of Month */
@@ -208,7 +249,11 @@ typedef struct {
 #define	TODC_TYPE_DS1643_ALARM_SECONDS		0x1fff
 #define	TODC_TYPE_DS1643_CENTURY		0x1ff8
 #define	TODC_TYPE_DS1643_FLAGS			0x1fff
+#define	TODC_TYPE_DS1643_NVRAM_ADDR_REG		0
+#define	TODC_TYPE_DS1643_NVRAM_DATA_REG		0
 
+#define	TODC_TYPE_DS1693_NVRAM_SIZE		0 /* Not handled yet */
+#define	TODC_TYPE_DS1693_SW_FLAGS		0
 #define	TODC_TYPE_DS1693_YEAR			0x09
 #define	TODC_TYPE_DS1693_MONTH			0x08
 #define	TODC_TYPE_DS1693_DOM			0x07	/* Day of Month */
@@ -226,7 +271,11 @@ typedef struct {
 #define	TODC_TYPE_DS1693_ALARM_SECONDS		0x01
 #define	TODC_TYPE_DS1693_CENTURY		0x48
 #define	TODC_TYPE_DS1693_FLAGS			0xff
+#define	TODC_TYPE_DS1693_NVRAM_ADDR_REG		0
+#define	TODC_TYPE_DS1693_NVRAM_DATA_REG		0
 
+#define	TODC_TYPE_DS1743_NVRAM_SIZE		0x1ff8
+#define	TODC_TYPE_DS1743_SW_FLAGS		0
 #define	TODC_TYPE_DS1743_YEAR			0x1fff
 #define	TODC_TYPE_DS1743_MONTH			0x1ffe
 #define	TODC_TYPE_DS1743_DOM			0x1ffd	/* Day of Month */
@@ -244,7 +293,11 @@ typedef struct {
 #define	TODC_TYPE_DS1743_ALARM_SECONDS		0x1fff
 #define	TODC_TYPE_DS1743_CENTURY		0x1ff8
 #define	TODC_TYPE_DS1743_FLAGS			0x1fff
+#define	TODC_TYPE_DS1743_NVRAM_ADDR_REG		0
+#define	TODC_TYPE_DS1743_NVRAM_DATA_REG		0
 
+#define	TODC_TYPE_DS1746_NVRAM_SIZE		0x1fff8
+#define	TODC_TYPE_DS1746_SW_FLAGS		0
 #define	TODC_TYPE_DS1746_YEAR			0x1ffff
 #define	TODC_TYPE_DS1746_MONTH			0x1fffe
 #define	TODC_TYPE_DS1746_DOM			0x1fffd	/* Day of Month */
@@ -262,16 +315,20 @@ typedef struct {
 #define	TODC_TYPE_DS1746_ALARM_SECONDS		0x00000
 #define	TODC_TYPE_DS1746_CENTURY		0x00000
 #define	TODC_TYPE_DS1746_FLAGS			0x00000
+#define	TODC_TYPE_DS1746_NVRAM_ADDR_REG		0
+#define	TODC_TYPE_DS1746_NVRAM_DATA_REG		0
 
-#define	TODC_TYPE_DS1747_YEAR			0x1ffff
-#define	TODC_TYPE_DS1747_MONTH			0x1fffe
-#define	TODC_TYPE_DS1747_DOM			0x1fffd	/* Day of Month */
-#define	TODC_TYPE_DS1747_DOW			0x1fffc	/* Day of Week */
-#define	TODC_TYPE_DS1747_HOURS			0x1fffb
-#define	TODC_TYPE_DS1747_MINUTES		0x1fffa
-#define	TODC_TYPE_DS1747_SECONDS		0x1fff9
-#define	TODC_TYPE_DS1747_CNTL_B			0x1fff9
-#define	TODC_TYPE_DS1747_CNTL_A			0x1fff8	/* control_a R/W regs */
+#define	TODC_TYPE_DS1747_NVRAM_SIZE		0x7fff8
+#define	TODC_TYPE_DS1747_SW_FLAGS		0
+#define	TODC_TYPE_DS1747_YEAR			0x7ffff
+#define	TODC_TYPE_DS1747_MONTH			0x7fffe
+#define	TODC_TYPE_DS1747_DOM			0x7fffd	/* Day of Month */
+#define	TODC_TYPE_DS1747_DOW			0x7fffc	/* Day of Week */
+#define	TODC_TYPE_DS1747_HOURS			0x7fffb
+#define	TODC_TYPE_DS1747_MINUTES		0x7fffa
+#define	TODC_TYPE_DS1747_SECONDS		0x7fff9
+#define	TODC_TYPE_DS1747_CNTL_B			0x7fff9
+#define	TODC_TYPE_DS1747_CNTL_A			0x7fff8	/* control_a R/W regs */
 #define	TODC_TYPE_DS1747_WATCHDOG		0x00000
 #define	TODC_TYPE_DS1747_INTERRUPTS		0x00000
 #define	TODC_TYPE_DS1747_ALARM_DATE		0x00000
@@ -280,7 +337,35 @@ typedef struct {
 #define	TODC_TYPE_DS1747_ALARM_SECONDS		0x00000
 #define	TODC_TYPE_DS1747_CENTURY		0x00000
 #define	TODC_TYPE_DS1747_FLAGS			0x00000
+#define	TODC_TYPE_DS1747_NVRAM_ADDR_REG		0
+#define	TODC_TYPE_DS1747_NVRAM_DATA_REG		0
+
+#define TODC_TYPE_DS17285_NVRAM_SIZE		(0x1000-0x80)    /* 4Kx8 NVRAM (minus RTC regs) */
+#define TODC_TYPE_DS17285_SW_FLAGS		TODC_FLAG_2_LEVEL_NVRAM
+#define TODC_TYPE_DS17285_SECONDS		(TODC_TYPE_DS17285_NVRAM_SIZE + 0x00)
+#define TODC_TYPE_DS17285_ALARM_SECONDS		(TODC_TYPE_DS17285_NVRAM_SIZE + 0x01)
+#define TODC_TYPE_DS17285_MINUTES		(TODC_TYPE_DS17285_NVRAM_SIZE + 0x02)
+#define TODC_TYPE_DS17285_ALARM_MINUTES		(TODC_TYPE_DS17285_NVRAM_SIZE + 0x03)
+#define TODC_TYPE_DS17285_HOURS			(TODC_TYPE_DS17285_NVRAM_SIZE + 0x04)
+#define TODC_TYPE_DS17285_ALARM_HOUR		(TODC_TYPE_DS17285_NVRAM_SIZE + 0x05)
+#define TODC_TYPE_DS17285_DOW			(TODC_TYPE_DS17285_NVRAM_SIZE + 0x06)
+#define TODC_TYPE_DS17285_DOM			(TODC_TYPE_DS17285_NVRAM_SIZE + 0x07)
+#define TODC_TYPE_DS17285_MONTH			(TODC_TYPE_DS17285_NVRAM_SIZE + 0x08)
+#define TODC_TYPE_DS17285_YEAR			(TODC_TYPE_DS17285_NVRAM_SIZE + 0x09)
+#define TODC_TYPE_DS17285_CNTL_A		(TODC_TYPE_DS17285_NVRAM_SIZE + 0x0A)
+#define TODC_TYPE_DS17285_CNTL_B		(TODC_TYPE_DS17285_NVRAM_SIZE + 0x0B)
+#define TODC_TYPE_DS17285_CNTL_C		(TODC_TYPE_DS17285_NVRAM_SIZE + 0x0C)
+#define TODC_TYPE_DS17285_CNTL_D		(TODC_TYPE_DS17285_NVRAM_SIZE + 0x0D)
+#define TODC_TYPE_DS17285_WATCHDOG		0
+#define TODC_TYPE_DS17285_INTERRUPTS		0
+#define TODC_TYPE_DS17285_ALARM_DATE		0
+#define TODC_TYPE_DS17285_CENTURY		0
+#define TODC_TYPE_DS17285_FLAGS			0
+#define TODC_TYPE_DS17285_NVRAM_ADDR_REG	0x50
+#define TODC_TYPE_DS17285_NVRAM_DATA_REG	0x53
  
+#define	TODC_TYPE_MC146818_NVRAM_SIZE		0	/* XXXX */
+#define	TODC_TYPE_MC146818_SW_FLAGS		0
 #define	TODC_TYPE_MC146818_YEAR			0x09
 #define	TODC_TYPE_MC146818_MONTH		0x08
 #define	TODC_TYPE_MC146818_DOM			0x07	/* Day of Month */
@@ -298,7 +383,11 @@ typedef struct {
 #define	TODC_TYPE_MC146818_ALARM_SECONDS	0x01
 #define	TODC_TYPE_MC146818_CENTURY		0xff
 #define	TODC_TYPE_MC146818_FLAGS		0xff
+#define	TODC_TYPE_MC146818_NVRAM_ADDR_REG	0
+#define	TODC_TYPE_MC146818_NVRAM_DATA_REG	0
   
+#define	TODC_TYPE_PC97307_NVRAM_SIZE		0	/* No NVRAM? */
+#define	TODC_TYPE_PC97307_SW_FLAGS		0
 #define	TODC_TYPE_PC97307_YEAR			0x09
 #define	TODC_TYPE_PC97307_MONTH			0x08
 #define	TODC_TYPE_PC97307_DOM			0x07	/* Day of Month */
@@ -316,6 +405,8 @@ typedef struct {
 #define	TODC_TYPE_PC97307_ALARM_SECONDS		0x01
 #define	TODC_TYPE_PC97307_CENTURY		0xff
 #define	TODC_TYPE_PC97307_FLAGS			0xff
+#define	TODC_TYPE_PC97307_NVRAM_ADDR_REG	0
+#define	TODC_TYPE_PC97307_NVRAM_DATA_REG	0
 
 /*
  * Define macros to allocate and init the todc_info_t table that will
@@ -334,6 +425,9 @@ typedef struct {
 									\
 	todc_info->as0_bits = (bits);					\
 									\
+	todc_info->nvram_size     = clock_type ##_NVRAM_SIZE;		\
+	todc_info->sw_flags       = clock_type ##_SW_FLAGS;		\
+									\
 	todc_info->year           = clock_type ##_YEAR;			\
 	todc_info->month          = clock_type ##_MONTH;		\
 	todc_info->day_of_month   = clock_type ##_DOM;			\
@@ -351,6 +445,9 @@ typedef struct {
 	todc_info->alarm_seconds  = clock_type ##_ALARM_SECONDS;	\
 	todc_info->century        = clock_type ##_CENTURY;		\
 	todc_info->flags          = clock_type ##_FLAGS;		\
+									\
+	todc_info->nvram_addr_reg = clock_type ##_NVRAM_ADDR_REG;	\
+	todc_info->nvram_data_reg = clock_type ##_NVRAM_DATA_REG;	\
 }
 
 extern todc_info_t *todc_info;