Merge branch 'master' of ssh://10.10.0.7/home/wd/git/u-boot/master

README.imx31

@@ -1,13 +0,0 @@
-i.MX31 specific Configuration Options:
---------------------------------------
-
-- Timer precision:
-		CONFIG_MX31_TIMER_HIGH_PRECISION
-
-		Enable higher precision timer. The low-precision timer
-		(default) provides approximately 4% error, whereas the
-		high-precision timer is about 0.4% accurate. The extra
-		accuracy is achieved at the cost of higher computational
-		overhead, which, in places where time is measured, should
-		not be critical, so, it should be safe to enable this
-		option.

cpu/arm1136/mx31/interrupts.c

@@ -27,30 +27,49 @@
 #define TIMER_BASE 0x53f90000 /* General purpose timer 1 */
 
 /* General purpose timers registers */
-#define GPTCR   __REG(TIMER_BASE) /* Control register */
+#define GPTCR	__REG(TIMER_BASE)		/* Control register	*/
-#define GPTPR  __REG(TIMER_BASE + 0x4) /* Prescaler register */
+#define GPTPR	__REG(TIMER_BASE + 0x4)		/* Prescaler register	*/
-#define GPTSR   __REG(TIMER_BASE + 0x8) /* Status register */
+#define GPTSR	__REG(TIMER_BASE + 0x8)		/* Status register	*/
-#define GPTCNT __REG(TIMER_BASE + 0x24) /* Counter register */
+#define GPTCNT	__REG(TIMER_BASE + 0x24)	/* Counter register	*/
 
 /* General purpose timers bitfields */
-#define GPTCR_SWR       (1<<15) /* Software reset */
+#define GPTCR_SWR		(1 << 15)	/* Software reset	*/
-#define GPTCR_FRR       (1<<9)  /* Freerun / restart */
+#define GPTCR_FRR		(1 << 9)	/* Freerun / restart	*/
-#define GPTCR_CLKSOURCE_32 (4<<6)  /* Clock source */
+#define GPTCR_CLKSOURCE_32	(4 << 6)	/* Clock source		*/
-#define GPTCR_TEN       (1)     /* Timer enable */
+#define GPTCR_TEN		1		/* Timer enable		*/
+
+/* "time" is measured in 1 / CFG_HZ seconds, "tick" is internal timer period */
+#ifdef CONFIG_MX31_TIMER_HIGH_PRECISION
+/* ~0.4% error - measured with stop-watch on 100s boot-delay */
+#define TICK_TO_TIME(t)	((t) * CFG_HZ / CONFIG_MX31_CLK32)
+#define TIME_TO_TICK(t)	((unsigned long long)(t) * CONFIG_MX31_CLK32 / CFG_HZ)
+#define US_TO_TICK(t)	(((unsigned long long)(t) * CONFIG_MX31_CLK32 + \
+			999999) / 1000000)
+#else
+/* ~2% error */
+#define TICK_PER_TIME	((CONFIG_MX31_CLK32 + CFG_HZ / 2) / CFG_HZ)
+#define US_PER_TICK	(1000000 / CONFIG_MX31_CLK32)
+#define TICK_TO_TIME(t)	((t) / TICK_PER_TIME)
+#define TIME_TO_TICK(t)	((unsigned long long)(t) * TICK_PER_TIME)
+#define US_TO_TICK(t)	(((t) + US_PER_TICK - 1) / US_PER_TICK)
+#endif
 
 static ulong timestamp;
 static ulong lastinc;
 
 /* nothing really to do with interrupts, just starts up a counter. */
+/* The 32768Hz 32-bit timer overruns in 131072 seconds */
 int interrupt_init (void)
 {
 	int i;
 
 	/* setup GP Timer 1 */
 	GPTCR = GPTCR_SWR;
-	for ( i=0; i<100; i++) GPTCR = 0; /* We have no udelay by now */
+	for (i = 0; i < 100; i++)
+		GPTCR = 0; /* We have no udelay by now */
 	GPTPR = 0; /* 32Khz */
-	GPTCR |= GPTCR_CLKSOURCE_32 | GPTCR_TEN; /* Freerun Mode, PERCLK1 input */
+	/* Freerun Mode, PERCLK1 input */
+	GPTCR |= GPTCR_CLKSOURCE_32 | GPTCR_TEN;
 
 	return 0;
 }
@@ -67,7 +86,7 @@ void reset_timer(void)
 	reset_timer_masked();
 }
 
-ulong get_timer_masked (void)
+unsigned long long get_ticks (void)
 {
 	ulong now = GPTCNT; /* current tick value */
 
@@ -80,6 +99,17 @@ ulong get_timer_masked (void)
 	return timestamp;
 }
 
+ulong get_timer_masked (void)
+{
+	/*
+	 * get_ticks() returns a long long (64 bit), it wraps in
+	 * 2^64 / CONFIG_MX31_CLK32 = 2^64 / 2^15 = 2^49 ~ 5 * 10^14 (s) ~
+	 * 5 * 10^9 days... and get_ticks() * CFG_HZ wraps in
+	 * 5 * 10^6 days - long enough.
+	 */
+	return TICK_TO_TIME(get_ticks());
+}
+
 ulong get_timer (ulong base)
 {
 	return get_timer_masked () - base;
@@ -87,29 +117,20 @@ ulong get_timer (ulong base)
 
 void set_timer (ulong t)
 {
+	timestamp = TIME_TO_TICK(t);
 }
 
 /* delay x useconds AND perserve advance timstamp value */
 void udelay (unsigned long usec)
 {
-	ulong tmo, tmp;
+	unsigned long long tmp;
+	ulong tmo;
 
-	if (usec >= 1000) {			/* if "big" number, spread normalization to seconds */
+	tmo = US_TO_TICK(usec);
-		tmo = usec / 1000;		/* start to normalize for usec to ticks per sec */
+	tmp = get_ticks() + tmo;	/* get current timestamp */
-		tmo *= CFG_HZ;			/* find number of "ticks" to wait to achieve target */
-		tmo /= 1000;			/* finish normalize. */
-	} else {					/* else small number, don't kill it prior to HZ multiply */
-		tmo = usec * CFG_HZ;
-		tmo /= (1000*1000);
-	}
 
-	tmp = get_timer (0);		/* get current timestamp */
+	while (get_ticks() < tmp)	/* loop till event */
-	if ( (tmo + tmp + 1) < tmp )/* if setting this forward will roll time stamp */
+		 /*NOP*/;
-		reset_timer_masked ();	/* reset "advancing" timestamp to 0, set lastinc value */
-	else
-		tmo	+= tmp;				/* else, set advancing stamp wake up time */
-	while (get_timer_masked () < tmo)/* loop till event */
-		/*NOP*/;
 }
 
 void reset_cpu (ulong addr)

doc/README.imx31

@@ -0,0 +1,29 @@
+U-Boot for Freescale i.MX31
+
+This file contains information for the port of U-Boot to the Freescale
+i.MX31 SoC.
+
+1. CONFIGURATION OPTIONS/SETTINGS
+---------------------------------
+
+1.1 Configuration of MC13783 SPI bus
+------------------------------------
+	The power management companion chip MC13783 is connected to the
+	i.MX31 via an SPI bus. Use the following configuration options
+	to setup the bus and chip select used for a particular board.
+
+	CONFIG_MC13783_SPI_BUS	-- defines the SPI bus the MC13783 is connected to.
+			   Note that 0 is CSPI1, 1 is CSPI2 and 2 is CSPI3.
+	CONFIG_MC13783_SPI_CS	-- define the chip select the MC13783 s connected to.
+
+1.2 Timer precision
+-------------------
+	CONFIG_MX31_TIMER_HIGH_PRECISION
+
+	Enable higher precision timer. The low-precision timer
+	(default) provides approximately 4% error, whereas the
+	high-precision timer is about 0.4% accurate. The extra
+	accuracy is achieved at the cost of higher computational
+	overhead, which, in places where time is measured, should
+	not be critical, so, it should be safe to enable this
+	option.

doc/README.mx31

@@ -1,17 +0,0 @@
-U-Boot for Freescale i.MX31
-
-This file contains information for the port of U-Boot to the Freescale
-i.MX31 SoC.
-
-1. CONFIGURATION OPTIONS/SETTINGS
----------------------------------
-
-1.1 Configuration of MC13783 SPI bus
-------------------------------------
-The power management companion chip MC13783 is connected to the
-i.MX31 via an SPI bus. Use the following configuration options
-to setup the bus and chip select used for a particular board.
-
-CONFIG_MC13783_SPI_BUS	-- defines the SPI bus the MC13783 is connected to.
-			   Note that 0 is CSPI1, 1 is CSPI2 and 2 is CSPI3.
-CONFIG_MC13783_SPI_CS	-- define the chip select the MC13783 s connected to.

doc/uImage.FIT/multi.its

@@ -56,6 +56,7 @@
 			data = /incbin/("./eldk-4.2-ramdisk");
 			type = "ramdisk";
 			arch = "ppc";
+			os = "linux";
 			compression = "gzip";
 			hash@1 {
 				algo = "sha1";
@@ -67,6 +68,7 @@
 			data = /incbin/("./eldk-3.1-ramdisk");
 			type = "ramdisk";
 			arch = "ppc";
+			os = "linux";
 			compression = "gzip";
 			hash@1 {
 				algo = "crc32";

include/configs/imx31_litekit.h

@@ -122,11 +122,9 @@
 #define CFG_MEMTEST_START	0  /* memtest works on */
 #define CFG_MEMTEST_END		0x10000
 
-#undef	CFG_CLKS_IN_HZ		/* everything, incl board info, in Hz */
-
 #define CFG_LOAD_ADDR		0 /* default load address */
 
-#define CFG_HZ			32000
+#define CFG_HZ			1000
 
 #define CONFIG_CMDLINE_EDITING	1
 

include/configs/imx31_phycore.h

@@ -126,7 +126,7 @@
 
 #define CFG_LOAD_ADDR		0 /* default load address */
 
-#define CFG_HZ			32000
+#define CFG_HZ			1000
 
 #define CONFIG_CMDLINE_EDITING	1
 

include/configs/mx31ads.h

@@ -139,11 +139,9 @@
 #define CFG_MEMTEST_START	0		/* memtest works on */
 #define CFG_MEMTEST_END		0x10000
 
-#undef	CFG_CLKS_IN_HZ		/* everything, incl board info, in Hz */
-
 #define CFG_LOAD_ADDR		CONFIG_LOADADDR
 
-#define CFG_HZ			CONFIG_MX31_CLK32 /* use 32kHz clock as source */
+#define CFG_HZ			1000
 
 #define CONFIG_CMDLINE_EDITING	1
 

lib_arm/board.c

@@ -220,18 +220,6 @@ static int init_func_i2c (void)
 }
 #endif
 
-#ifdef CONFIG_SKIP_RELOCATE_UBOOT
-/*
- * This routine sets the relocation done flag, because even if
- * relocation is skipped, the flag is used by other generic code.
- */
-static int reloc_init(void)
-{
-	gd->flags |= GD_FLG_RELOC;
-	return 0;
-}
-#endif
-
 /*
  * Breathe some life into the board...
  *
@@ -261,11 +249,6 @@ int print_cpuinfo (void); /* test-only */
 
 init_fnc_t *init_sequence[] = {
 	cpu_init,		/* basic cpu dependent setup */
-#if defined(CONFIG_SKIP_RELOCATE_UBOOT)
-	reloc_init,		/* Set the relocation done flag, must
-				   do this AFTER cpu_init(), but as soon
-				   as possible */
-#endif
 	board_init,		/* basic board dependent setup */
 	interrupt_init,		/* set up exceptions */
 	env_init,		/* initialize environment */
@@ -307,6 +290,8 @@ void start_armboot (void)
 	gd->bd = (bd_t*)((char*)gd - sizeof(bd_t));
 	memset (gd->bd, 0, sizeof (bd_t));
 
+	gd->flags |= GD_FLG_RELOC;
+
 	monitor_flash_len = _bss_start - _armboot_start;
 
 	for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {