i.mx: introduce the armv7/imx-common folder

In order to support the coming MX6 platform and to reducde
the duplicated code, we had better move some common files
or functions to the imx-common folder for sharing.

This patch does the following:
- move speed.c file from armv7/mx5/speed.c to armv7/imx-common/speed.c
- move armv7/mx5/timer.c to armv7/imx-common/timer.c, no any new feature
  added but just fix the checkpatch errors in the old file and remove
  the CONFIG_SYS_MX5_CLK32 reference in the file
- create one new file cpu.c file to store the common function with i.mx5/6

Signed-off-by: Jason Liu <jason.hui@linaro.org>
Cc:Stefano Babic <sbabic@denx.de>
Acked-by: Stefano Babic <sbabic@denx.de>

Makefile

@@ -296,6 +296,14 @@ LIBS += post/libpost.o
 ifneq ($(CONFIG_AM335X)$(CONFIG_OMAP34XX)$(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX),)
 LIBS += $(CPUDIR)/omap-common/libomap-common.o
 endif
+
+ifeq ($(SOC),mx5)
+LIBS += $(CPUDIR)/imx-common/libimx-common.o
+endif
+ifeq ($(SOC),mx6)
+LIBS += $(CPUDIR)/imx-common/libimx-common.o
+endif
+
 ifeq ($(SOC),s5pc1xx)
 LIBS += $(CPUDIR)/s5p-common/libs5p-common.o
 endif

arch/arm/cpu/armv7/imx-common/Makefile

@@ -0,0 +1,47 @@
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# (C) Copyright 2011 Freescale Semiconductor, Inc.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB     = $(obj)libimx-common.o
+
+COBJS	= timer.o cpu.o speed.o
+
+SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+
+all:	$(obj).depend $(LIB)
+
+$(LIB):	$(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################

arch/arm/cpu/armv7/imx-common/cpu.c

@@ -0,0 +1,108 @@
+/*
+ * (C) Copyright 2007
+ * Sascha Hauer, Pengutronix
+ *
+ * (C) Copyright 2009 Freescale Semiconductor, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/errno.h>
+#include <asm/io.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/sys_proto.h>
+
+#ifdef CONFIG_FSL_ESDHC
+#include <fsl_esdhc.h>
+#endif
+
+static char *get_reset_cause(void)
+{
+	u32 cause;
+	struct src *src_regs = (struct src *)SRC_BASE_ADDR;
+
+	cause = readl(&src_regs->srsr);
+	writel(cause, &src_regs->srsr);
+
+	switch (cause) {
+	case 0x00001:
+		return "POR";
+	case 0x00004:
+		return "CSU";
+	case 0x00008:
+		return "IPP USER";
+	case 0x00010:
+		return "WDOG";
+	case 0x00020:
+		return "JTAG HIGH-Z";
+	case 0x00040:
+		return "JTAG SW";
+	case 0x10000:
+		return "WARM BOOT";
+	default:
+		return "unknown reset";
+	}
+}
+
+#if defined(CONFIG_DISPLAY_CPUINFO)
+int print_cpuinfo(void)
+{
+	u32 cpurev;
+
+	cpurev = get_cpu_rev();
+	printf("CPU:   Freescale i.MX%x family rev%d.%d at %d MHz\n",
+		(cpurev & 0xFF000) >> 12,
+		(cpurev & 0x000F0) >> 4,
+		(cpurev & 0x0000F) >> 0,
+		mxc_get_clock(MXC_ARM_CLK) / 1000000);
+	printf("Reset cause: %s\n", get_reset_cause());
+	return 0;
+}
+#endif
+
+int cpu_eth_init(bd_t *bis)
+{
+	int rc = -ENODEV;
+
+#if defined(CONFIG_FEC_MXC)
+	rc = fecmxc_initialize(bis);
+#endif
+
+	return rc;
+}
+
+/*
+ * Initializes on-chip MMC controllers.
+ * to override, implement board_mmc_init()
+ */
+int cpu_mmc_init(bd_t *bis)
+{
+#ifdef CONFIG_FSL_ESDHC
+	return fsl_esdhc_mmc_init(bis);
+#else
+	return 0;
+#endif
+}
+
+void reset_cpu(ulong addr)
+{
+	__raw_writew(4, WDOG1_BASE_ADDR);
+}

arch/arm/cpu/armv7/mx5/timer.c → arch/arm/cpu/armv7/imx-common/timer.c

@@ -39,10 +39,11 @@ struct mxc_gpt {
 static struct mxc_gpt *cur_gpt = (struct mxc_gpt *)GPT1_BASE_ADDR;
 
 /* General purpose timers bitfields */
-#define GPTCR_SWR       (1<<15)	/* Software reset */
-#define GPTCR_FRR       (1<<9)	/* Freerun / restart */
-#define GPTCR_CLKSOURCE_32 (4<<6)	/* Clock source */
-#define GPTCR_TEN       (1)	/* Timer enable */
+#define GPTCR_SWR		(1 << 15)	/* Software reset */
+#define GPTCR_FRR		(1 << 9)	/* Freerun / restart */
+#define GPTCR_CLKSOURCE_32	(4 << 6)	/* Clock source */
+#define GPTCR_TEN		1		/* Timer enable */
+#define CLK_32KHZ		32768		/* 32Khz input */
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -68,7 +69,7 @@ int timer_init(void)
 	__raw_writel(i | GPTCR_CLKSOURCE_32 | GPTCR_TEN, &cur_gpt->control);
 
 	val = __raw_readl(&cur_gpt->counter);
-	lastinc = val / (CONFIG_SYS_MX5_CLK32 / CONFIG_SYS_HZ);
+	lastinc = val / (CLK_32KHZ / CONFIG_SYS_HZ);
 	timestamp = 0;
 
 	return 0;
@@ -77,11 +78,11 @@ int timer_init(void)
 ulong get_timer_masked(void)
 {
 	ulong val = __raw_readl(&cur_gpt->counter);
-	val /= (CONFIG_SYS_MX5_CLK32 / CONFIG_SYS_HZ);
+	val /= (CLK_32KHZ / CONFIG_SYS_HZ);
 	if (val >= lastinc)
 		timestamp += (val - lastinc);
 	else
-		timestamp += ((0xFFFFFFFF / (CONFIG_SYS_MX5_CLK32 / CONFIG_SYS_HZ))
+		timestamp += ((0xFFFFFFFF / (CLK_32KHZ / CONFIG_SYS_HZ))
 				- lastinc) + val;
 	lastinc = val;
 	return timestamp;
@@ -96,7 +97,7 @@ ulong get_timer(ulong base)
 void __udelay(unsigned long usec)
 {
 	unsigned long now, start, tmo;
-	tmo = usec * (CONFIG_SYS_MX5_CLK32 / 1000) / 1000;
+	tmo = usec * (CLK_32KHZ / 1000) / 1000;
 
 	if (!tmo)
 		tmo = 1;

arch/arm/cpu/armv7/mx5/Makefile

@@ -27,7 +27,7 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(SOC).o
 
-COBJS	= soc.o clock.o iomux.o timer.o speed.o
+COBJS	= soc.o clock.o iomux.o
 SOBJS = lowlevel_init.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)

arch/arm/cpu/armv7/mx5/soc.c

@@ -31,10 +31,6 @@
 #include <asm/errno.h>
 #include <asm/io.h>
 
-#ifdef CONFIG_FSL_ESDHC
-#include <fsl_esdhc.h>
-#endif
-
 #if !(defined(CONFIG_MX51) || defined(CONFIG_MX53))
 #error "CPU_TYPE not defined"
 #endif
@@ -75,61 +71,6 @@ u32 get_cpu_rev(void)
 	return system_rev;
 }
 
-static char *get_reset_cause(void)
-{
-	u32 cause;
-	struct src *src_regs = (struct src *)SRC_BASE_ADDR;
-
-	cause = readl(&src_regs->srsr);
-	writel(cause, &src_regs->srsr);
-
-	switch (cause) {
-	case 0x00001:
-		return "POR";
-	case 0x00004:
-		return "CSU";
-	case 0x00008:
-		return "IPP USER";
-	case 0x00010:
-		return "WDOG";
-	case 0x00020:
-		return "JTAG HIGH-Z";
-	case 0x00040:
-		return "JTAG SW";
-	case 0x10000:
-		return "WARM BOOT";
-	default:
-		return "unknown reset";
-	}
-}
-
-#if defined(CONFIG_DISPLAY_CPUINFO)
-int print_cpuinfo(void)
-{
-	u32 cpurev;
-
-	cpurev = get_cpu_rev();
-	printf("CPU:   Freescale i.MX%x family rev%d.%d at %d MHz\n",
-		(cpurev & 0xFF000) >> 12,
-		(cpurev & 0x000F0) >> 4,
-		(cpurev & 0x0000F) >> 0,
-		mxc_get_clock(MXC_ARM_CLK) / 1000000);
-	printf("Reset cause: %s\n", get_reset_cause());
-	return 0;
-}
-#endif
-
-int cpu_eth_init(bd_t *bis)
-{
-	int rc = -ENODEV;
-
-#if defined(CONFIG_FEC_MXC)
-	rc = fecmxc_initialize(bis);
-#endif
-
-	return rc;
-}
-
 #if defined(CONFIG_FEC_MXC)
 void imx_get_mac_from_fuse(unsigned char *mac)
 {
@@ -144,19 +85,6 @@ void imx_get_mac_from_fuse(unsigned char *mac)
 }
 #endif
 
-/*
- * Initializes on-chip MMC controllers.
- * to override, implement board_mmc_init()
- */
-int cpu_mmc_init(bd_t *bis)
-{
-#ifdef CONFIG_FSL_ESDHC
-	return fsl_esdhc_mmc_init(bis);
-#else
-	return 0;
-#endif
-}
-
 void set_chipselect_size(int const cs_size)
 {
 	unsigned int reg;
@@ -187,8 +115,3 @@ void set_chipselect_size(int const cs_size)
 
 	writel(reg, &iomuxc_regs->gpr1);
 }
-
-void reset_cpu(ulong addr)
-{
-	__raw_writew(4, WDOG1_BASE_ADDR);
-}