Merge remote-tracking branch 'u-boot-imx/master'

4 files changed, 78 insertions, 86 deletions

diff --git a/arch/arm/cpu/arm1136/mx31/generic.c b/arch/arm/cpu/arm1136/mx31/generic.c
index 8873fb719d..93f429cc52 100644
--- a/arch/arm/cpu/arm1136/mx31/generic.c
+++ b/arch/arm/cpu/arm1136/mx31/generic.c
@@ -22,6 +22,7 @@
  */
 
 #include <common.h>
+#include <div64.h>
 #include <asm/arch/imx-regs.h>
 #include <asm/arch/clock.h>
 #include <asm/io.h>
@@ -30,16 +31,17 @@
 static u32 mx31_decode_pll(u32 reg, u32 infreq)
 {
 	u32 mfi = GET_PLL_MFI(reg);
-	u32 mfn = GET_PLL_MFN(reg);
+	s32 mfn = GET_PLL_MFN(reg);
 	u32 mfd = GET_PLL_MFD(reg);
 	u32 pd =  GET_PLL_PD(reg);
 
 	mfi = mfi <= 5 ? 5 : mfi;
+	mfn = mfn >= 512 ? mfn - 1024 : mfn;
 	mfd += 1;
 	pd += 1;
 
-	return ((2 * (infreq >> 10) * (mfi * mfd + mfn)) /
-		(mfd * pd)) << 10;
+	return lldiv(2 * (u64)infreq * (mfi * mfd + mfn),
+		mfd * pd);
 }
 
 static u32 mx31_get_mpl_dpdgck_clk(void)
@@ -47,9 +49,9 @@ static u32 mx31_get_mpl_dpdgck_clk(void)
 	u32 infreq;
 
 	if ((readl(CCM_CCMR) & CCMR_PRCS_MASK) == CCMR_FPM)
-		infreq = CONFIG_MX31_CLK32 * 1024;
+		infreq = MXC_CLK32 * 1024;
 	else
-		infreq = CONFIG_MX31_HCLK_FREQ;
+		infreq = MXC_HCLK;
 
 	return mx31_decode_pll(readl(CCM_MPCTL), infreq);
 }
diff --git a/arch/arm/cpu/arm1136/mx31/timer.c b/arch/arm/cpu/arm1136/mx31/timer.c
index 72081a8bde..36266da5aa 100644
--- a/arch/arm/cpu/arm1136/mx31/timer.c
+++ b/arch/arm/cpu/arm1136/mx31/timer.c
@@ -23,6 +23,7 @@
 
 #include <common.h>
 #include <asm/arch/imx-regs.h>
+#include <asm/arch/clock.h>
 #include <div64.h>
 #include <watchdog.h>
 #include <asm/io.h>
@@ -53,28 +54,27 @@ DECLARE_GLOBAL_DATA_PTR;
 static inline unsigned long long tick_to_time(unsigned long long tick)
 {
 	tick *= CONFIG_SYS_HZ;
-	do_div(tick, CONFIG_MX31_CLK32);
+	do_div(tick, MXC_CLK32);
 	return tick;
 }
 
 static inline unsigned long long time_to_tick(unsigned long long time)
 {
-	time *= CONFIG_MX31_CLK32;
+	time *= MXC_CLK32;
 	do_div(time, CONFIG_SYS_HZ);
 	return time;
 }
 
 static inline unsigned long long us_to_tick(unsigned long long us)
 {
-	us = us * CONFIG_MX31_CLK32 + 999999;
+	us = us * MXC_CLK32 + 999999;
 	do_div(us, 1000000);
 	return us;
 }
 #else
 /* ~2% error */
-#define TICK_PER_TIME	((CONFIG_MX31_CLK32 + CONFIG_SYS_HZ / 2) \
-							/ CONFIG_SYS_HZ)
-#define US_PER_TICK	(1000000 / CONFIG_MX31_CLK32)
+#define TICK_PER_TIME	((MXC_CLK32 + CONFIG_SYS_HZ / 2) / CONFIG_SYS_HZ)
+#define US_PER_TICK	(1000000 / MXC_CLK32)
 
 static inline unsigned long long tick_to_time(unsigned long long tick)
 {
@@ -128,7 +128,7 @@ 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) ~
+	 * 2^64 / MXC_CLK32 = 2^64 / 2^15 = 2^49 ~ 5 * 10^14 (s) ~
 	 * 5 * 10^9 days... and get_ticks() * CONFIG_SYS_HZ wraps in
 	 * 5 * 10^6 days - long enough.
 	 */
@@ -159,7 +159,7 @@ void __udelay(unsigned long usec)
  */
 ulong get_tbclk(void)
 {
-	return CONFIG_MX31_CLK32;
+	return MXC_CLK32;
 }
 
 void reset_cpu(ulong addr)
diff --git a/arch/arm/cpu/arm1136/mx35/generic.c b/arch/arm/cpu/arm1136/mx35/generic.c
index d435e8af69..ef65176eed 100644
--- a/arch/arm/cpu/arm1136/mx35/generic.c
+++ b/arch/arm/cpu/arm1136/mx35/generic.c
@@ -24,6 +24,7 @@
  */
 
 #include <common.h>
+#include <div64.h>
 #include <asm/io.h>
 #include <asm/errno.h>
 #include <asm/arch/imx-regs.h>
@@ -129,15 +130,17 @@ static int get_ahb_div(u32 pdr0)
 static u32 decode_pll(u32 reg, u32 infreq)
 {
 	u32 mfi = (reg >> 10) & 0xf;
-	u32 mfn = reg & 0x3f;
-	u32 mfd = (reg >> 16) & 0x3f;
+	s32 mfn = reg & 0x3ff;
+	u32 mfd = (reg >> 16) & 0x3ff;
 	u32 pd = (reg >> 26) & 0xf;
 
 	mfi = mfi <= 5 ? 5 : mfi;
+	mfn = mfn >= 512 ? mfn - 1024 : mfn;
 	mfd += 1;
 	pd += 1;
 
-	return ((2 * (infreq / 1000) * (mfi * mfd + mfn)) / (mfd * pd)) * 1000;
+	return lldiv(2 * (u64)infreq * (mfi * mfd + mfn),
+		mfd * pd);
 }
 
 static u32 get_mcu_main_clk(void)
@@ -146,9 +149,7 @@ static u32 get_mcu_main_clk(void)
 	struct ccm_regs *ccm =
 		(struct ccm_regs *)IMX_CCM_BASE;
 	arm_div = get_arm_div(readl(&ccm->pdr0), &fi, &fd);
-	fi *=
-		decode_pll(readl(&ccm->mpctl),
-			CONFIG_MX35_HCLK_FREQ);
+	fi *= decode_pll(readl(&ccm->mpctl), MXC_HCLK);
 	return fi / (arm_div * fd);
 }
 
@@ -171,17 +172,14 @@ static u32 get_ipg_per_clk(void)
 	u32 pdr4 = readl(&ccm->pdr4);
 	u32 div;
 	if (pdr0 & MXC_CCM_PDR0_PER_SEL) {
-		div = (CCM_GET_DIVIDER(pdr4,
-			MXC_CCM_PDR4_PER0_PRDF_MASK,
-			MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1) *
-			(CCM_GET_DIVIDER(pdr4,
+		div = CCM_GET_DIVIDER(pdr4,
 			MXC_CCM_PDR4_PER0_PODF_MASK,
-			MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1);
+			MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1;
 	} else {
 		div = CCM_GET_DIVIDER(pdr0,
 			MXC_CCM_PDR0_PER_PODF_MASK,
 			MXC_CCM_PDR0_PER_PODF_OFFSET) + 1;
-		freq /= get_ahb_div(pdr0);
+		div *= get_ahb_div(pdr0);
 	}
 	return freq / div;
 }
@@ -193,25 +191,20 @@ u32 imx_get_uartclk(void)
 		(struct ccm_regs *)IMX_CCM_BASE;
 	u32 pdr4 = readl(&ccm->pdr4);
 
-	if (readl(&ccm->pdr3) & MXC_CCM_PDR3_UART_M_U) {
+	if (readl(&ccm->pdr3) & MXC_CCM_PDR3_UART_M_U)
 		freq = get_mcu_main_clk();
-	} else {
-		freq = decode_pll(readl(&ccm->ppctl),
-			CONFIG_MX35_HCLK_FREQ);
-	}
-	freq /= ((CCM_GET_DIVIDER(pdr4,
-			MXC_CCM_PDR4_UART_PRDF_MASK,
-			MXC_CCM_PDR4_UART_PRDF_OFFSET) + 1) *
-		(CCM_GET_DIVIDER(pdr4,
+	else
+		freq = decode_pll(readl(&ccm->ppctl), MXC_HCLK);
+	freq /= CCM_GET_DIVIDER(pdr4,
 			MXC_CCM_PDR4_UART_PODF_MASK,
-			MXC_CCM_PDR4_UART_PODF_OFFSET) + 1));
+			MXC_CCM_PDR4_UART_PODF_OFFSET) + 1;
 	return freq;
 }
 
 unsigned int mxc_get_main_clock(enum mxc_main_clock clk)
 {
 	u32 nfc_pdf, hsp_podf;
-	u32 pll, ret_val = 0, usb_prdf, usb_podf;
+	u32 pll, ret_val = 0, usb_podf;
 	struct ccm_regs *ccm =
 		(struct ccm_regs *)IMX_CCM_BASE;
 
@@ -255,16 +248,13 @@ unsigned int mxc_get_main_clock(enum mxc_main_clock clk)
 		ret_val = pll / (nfc_pdf + 1);
 		break;
 	case USB_CLK:
-		usb_prdf = (reg4 >> 25) & 0x7;
-		usb_podf = (reg4 >> 22) & 0x7;
-		if (reg4 & 0x200) {
+		usb_podf = (reg4 >> 22) & 0x3F;
+		if (reg4 & 0x200)
 			pll = get_mcu_main_clk();
-		} else {
-			pll = decode_pll(readl(&ccm->ppctl),
-				CONFIG_MX35_HCLK_FREQ);
-		}
+		else
+			pll = decode_pll(readl(&ccm->ppctl), MXC_HCLK);
 
-		ret_val = pll / ((usb_prdf + 1) * (usb_podf + 1));
+		ret_val = pll / (usb_podf + 1);
 		break;
 	default:
 		printf("Unknown clock: %d\n", clk);
@@ -287,18 +277,16 @@ unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk)
 	case UART2_BAUD:
 	case UART3_BAUD:
 		clk_sel = mpdr3 & (1 << 14);
-		pre_pdf = (mpdr4 >> 13) & 0x7;
-		pdf = (mpdr4 >> 10) & 0x7;
+		pdf = (mpdr4 >> 10) & 0x3F;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
-			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
-				((pre_pdf + 1) * (pdf + 1));
+			decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
 		break;
 	case SSI1_BAUD:
 		pre_pdf = (mpdr2 >> 24) & 0x7;
 		pdf = mpdr2 & 0x3F;
 		clk_sel = mpdr2 & (1 << 6);
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
-			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
+			decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
 				((pre_pdf + 1) * (pdf + 1));
 		break;
 	case SSI2_BAUD:
@@ -306,16 +294,14 @@ unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk)
 		pdf = (mpdr2 >> 8) & 0x3F;
 		clk_sel = mpdr2 & (1 << 6);
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
-			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
+			decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
 				((pre_pdf + 1) * (pdf + 1));
 		break;
 	case CSI_BAUD:
 		clk_sel = mpdr2 & (1 << 7);
-		pre_pdf = (mpdr2 >> 16) & 0x7;
-		pdf = (mpdr2 >> 19) & 0x7;
+		pdf = (mpdr2 >> 16) & 0x3F;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
-			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
-				((pre_pdf + 1) * (pdf + 1));
+			decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
 		break;
 	case MSHC_CLK:
 		pre_pdf = readl(&ccm->pdr1);
@@ -323,39 +309,33 @@ unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk)
 		pdf = (pre_pdf >> 22) & 0x3F;
 		pre_pdf = (pre_pdf >> 28) & 0x7;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
-			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
+			decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
 				((pre_pdf + 1) * (pdf + 1));
 		break;
 	case ESDHC1_CLK:
 		clk_sel = mpdr3 & 0x40;
-		pre_pdf = mpdr3 & 0x7;
-		pdf = (mpdr3>>3) & 0x7;
+		pdf = mpdr3 & 0x3F;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
-			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
-				((pre_pdf + 1) * (pdf + 1));
+			decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
 		break;
 	case ESDHC2_CLK:
 		clk_sel = mpdr3 & 0x40;
-		pre_pdf = (mpdr3 >> 8) & 0x7;
-		pdf = (mpdr3 >> 11) & 0x7;
+		pdf = (mpdr3 >> 8) & 0x3F;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
-			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
-				((pre_pdf + 1) * (pdf + 1));
+			decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
 		break;
 	case ESDHC3_CLK:
 		clk_sel = mpdr3 & 0x40;
-		pre_pdf = (mpdr3 >> 16) & 0x7;
-		pdf = (mpdr3 >> 19) & 0x7;
+		pdf = (mpdr3 >> 16) & 0x3F;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
-			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
-				((pre_pdf + 1) * (pdf + 1));
+			decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
 		break;
 	case SPDIF_CLK:
 		clk_sel = mpdr3 & 0x400000;
 		pre_pdf = (mpdr3 >> 29) & 0x7;
 		pdf = (mpdr3 >> 23) & 0x3F;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
-			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
+			decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
 				((pre_pdf + 1) * (pdf + 1));
 		break;
 	default:
diff --git a/arch/arm/cpu/arm1136/mx35/timer.c b/arch/arm/cpu/arm1136/mx35/timer.c
index 04937a1dfe..9680b7fde7 100644
--- a/arch/arm/cpu/arm1136/mx35/timer.c
+++ b/arch/arm/cpu/arm1136/mx35/timer.c
@@ -27,6 +27,7 @@
 #include <asm/io.h>
 #include <div64.h>
 #include <asm/arch/imx-regs.h>
+#include <asm/arch/crm_regs.h>
 #include <asm/arch/clock.h>
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -37,43 +38,52 @@ DECLARE_GLOBAL_DATA_PTR;
 /* General purpose timers bitfields */
 #define GPTCR_SWR       (1<<15)	/* Software reset */
 #define GPTCR_FRR       (1<<9)	/* Freerun / restart */
-#define GPTCR_CLKSOURCE_32   (0x100<<6)	/* Clock source */
-#define GPTCR_CLKSOURCE_IPG (0x001<<6)	/* Clock source */
+#define GPTCR_CLKSOURCE_32   (4<<6)	/* Clock source */
 #define GPTCR_TEN       (1)	/* Timer enable */
 
-#define	TIMER_FREQ_HZ	mxc_get_clock(MXC_IPG_CLK)
-
+/*
+ * "time" is measured in 1 / CONFIG_SYS_HZ seconds,
+ * "tick" is internal timer period
+ */
+/* ~0.4% error - measured with stop-watch on 100s boot-delay */
 static inline unsigned long long tick_to_time(unsigned long long tick)
 {
 	tick *= CONFIG_SYS_HZ;
-	do_div(tick, TIMER_FREQ_HZ);
+	do_div(tick, MXC_CLK32);
 
 	return tick;
 }
 
-static inline unsigned long long us_to_tick(unsigned long long usec)
+static inline unsigned long long us_to_tick(unsigned long long us)
 {
-	usec *= TIMER_FREQ_HZ;
-	do_div(usec, 1000000);
+	us = us * MXC_CLK32 + 999999;
+	do_div(us, 1000000);
 
-	return usec;
+	return us;
 }
 
+/*
+ * nothing really to do with interrupts, just starts up a counter.
+ * The 32KHz 32-bit timer overruns in 134217 seconds
+ */
 int timer_init(void)
 {
 	int i;
 	struct gpt_regs *gpt = (struct gpt_regs *)GPT1_BASE_ADDR;
+	struct ccm_regs *ccm = (struct ccm_regs *)CCM_BASE_ADDR;
 
 	/* setup GP Timer 1 */
 	writel(GPTCR_SWR, &gpt->ctrl);
-	for (i = 0; i < 100; i++)
-		writel(0, &gpt->ctrl);	/* We have no udelay by now */
 
-	writel(0, &gpt->pre);
-	/* Freerun Mode, PERCLK1 input */
-	writel(readl(&gpt->ctrl) |
-		GPTCR_CLKSOURCE_IPG | GPTCR_TEN,
-		&gpt->ctrl);
+	writel(readl(&ccm->cgr1) | 3 << MXC_CCM_CGR1_GPT_OFFSET, &ccm->cgr1);
+
+	for (i = 0; i < 100; i++)
+		writel(0, &gpt->ctrl); /* We have no udelay by now */
+	writel(0, &gpt->pre); /* prescaler = 1 */
+	/* Freerun Mode, 32KHz input */
+	writel(readl(&gpt->ctrl) | GPTCR_CLKSOURCE_32 | GPTCR_FRR,
+			&gpt->ctrl);
+	writel(readl(&gpt->ctrl) | GPTCR_TEN, &gpt->ctrl);
 
 	return 0;
 }
@@ -101,7 +111,7 @@ ulong get_timer_masked(void)
 {
 	/*
 	 * get_ticks() returns a long long (64 bit), it wraps in
-	 * 2^64 / CONFIG_MX25_CLK32 = 2^64 / 2^15 = 2^49 ~ 5 * 10^14 (s) ~
+	 * 2^64 / MXC_CLK32 = 2^64 / 2^15 = 2^49 ~ 5 * 10^14 (s) ~
 	 * 5 * 10^9 days... and get_ticks() * CONFIG_SYS_HZ wraps in
 	 * 5 * 10^6 days - long enough.
 	 */
@@ -132,5 +142,5 @@ void __udelay(unsigned long usec)
  */
 ulong get_tbclk(void)
 {
-	return TIMER_FREQ_HZ;
+	return MXC_CLK32;
 }