ARM: S3C24XX: move plat-s3c24xx/cpu.c

Following the model of s3c64xx cpu.c becomes common.c in mach-s3c24xx,
to got more common code added later on.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

2 files changed, 238 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c24xx/Makefile b/arch/arm/mach-s3c24xx/Makefile
index 3518fe812d5..b081db7860d 100644
--- a/arch/arm/mach-s3c24xx/Makefile
+++ b/arch/arm/mach-s3c24xx/Makefile
@@ -14,6 +14,8 @@ obj-				:=
 
 # core
 
+obj-y				+= common.o
+
 obj-$(CONFIG_CPU_S3C2410)	+= s3c2410.o
 obj-$(CONFIG_S3C2410_DMA)	+= dma-s3c2410.o
 obj-$(CONFIG_S3C2410_PM)	+= pm-s3c2410.o sleep-s3c2410.o
diff --git a/arch/arm/mach-s3c24xx/common.c b/arch/arm/mach-s3c24xx/common.c
new file mode 100644
index 00000000000..dc9927b1374
--- /dev/null
+++ b/arch/arm/mach-s3c24xx/common.c
@@ -0,0 +1,236 @@
+/* linux/arch/arm/plat-s3c24xx/cpu.c
+ *
+ * Copyright (c) 2004-2005 Simtec Electronics
+ *	http://www.simtec.co.uk/products/SWLINUX/
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * Common code for S3C24XX machines
+ *
+ * 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 <linux/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/serial_core.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+#include <mach/regs-clock.h>
+#include <asm/irq.h>
+#include <asm/cacheflush.h>
+#include <asm/system_info.h>
+#include <asm/system_misc.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+
+#include <mach/regs-gpio.h>
+#include <plat/regs-serial.h>
+
+#include <plat/cpu.h>
+#include <plat/devs.h>
+#include <plat/clock.h>
+#include <plat/s3c2410.h>
+#include <plat/s3c2412.h>
+#include <plat/s3c2416.h>
+#include <plat/s3c244x.h>
+#include <plat/s3c2443.h>
+
+/* table of supported CPUs */
+
+static const char name_s3c2410[]  = "S3C2410";
+static const char name_s3c2412[]  = "S3C2412";
+static const char name_s3c2416[]  = "S3C2416/S3C2450";
+static const char name_s3c2440[]  = "S3C2440";
+static const char name_s3c2442[]  = "S3C2442";
+static const char name_s3c2442b[]  = "S3C2442B";
+static const char name_s3c2443[]  = "S3C2443";
+static const char name_s3c2410a[] = "S3C2410A";
+static const char name_s3c2440a[] = "S3C2440A";
+
+static struct cpu_table cpu_ids[] __initdata = {
+	{
+		.idcode		= 0x32410000,
+		.idmask		= 0xffffffff,
+		.map_io		= s3c2410_map_io,
+		.init_clocks	= s3c2410_init_clocks,
+		.init_uarts	= s3c2410_init_uarts,
+		.init		= s3c2410_init,
+		.name		= name_s3c2410
+	},
+	{
+		.idcode		= 0x32410002,
+		.idmask		= 0xffffffff,
+		.map_io		= s3c2410_map_io,
+		.init_clocks	= s3c2410_init_clocks,
+		.init_uarts	= s3c2410_init_uarts,
+		.init		= s3c2410a_init,
+		.name		= name_s3c2410a
+	},
+	{
+		.idcode		= 0x32440000,
+		.idmask		= 0xffffffff,
+		.map_io		= s3c2440_map_io,
+		.init_clocks	= s3c244x_init_clocks,
+		.init_uarts	= s3c244x_init_uarts,
+		.init		= s3c2440_init,
+		.name		= name_s3c2440
+	},
+	{
+		.idcode		= 0x32440001,
+		.idmask		= 0xffffffff,
+		.map_io		= s3c2440_map_io,
+		.init_clocks	= s3c244x_init_clocks,
+		.init_uarts	= s3c244x_init_uarts,
+		.init		= s3c2440_init,
+		.name		= name_s3c2440a
+	},
+	{
+		.idcode		= 0x32440aaa,
+		.idmask		= 0xffffffff,
+		.map_io		= s3c2442_map_io,
+		.init_clocks	= s3c244x_init_clocks,
+		.init_uarts	= s3c244x_init_uarts,
+		.init		= s3c2442_init,
+		.name		= name_s3c2442
+	},
+	{
+		.idcode		= 0x32440aab,
+		.idmask		= 0xffffffff,
+		.map_io		= s3c2442_map_io,
+		.init_clocks	= s3c244x_init_clocks,
+		.init_uarts	= s3c244x_init_uarts,
+		.init		= s3c2442_init,
+		.name		= name_s3c2442b
+	},
+	{
+		.idcode		= 0x32412001,
+		.idmask		= 0xffffffff,
+		.map_io		= s3c2412_map_io,
+		.init_clocks	= s3c2412_init_clocks,
+		.init_uarts	= s3c2412_init_uarts,
+		.init		= s3c2412_init,
+		.name		= name_s3c2412,
+	},
+	{			/* a newer version of the s3c2412 */
+		.idcode		= 0x32412003,
+		.idmask		= 0xffffffff,
+		.map_io		= s3c2412_map_io,
+		.init_clocks	= s3c2412_init_clocks,
+		.init_uarts	= s3c2412_init_uarts,
+		.init		= s3c2412_init,
+		.name		= name_s3c2412,
+	},
+	{			/* a strange version of the s3c2416 */
+		.idcode		= 0x32450003,
+		.idmask		= 0xffffffff,
+		.map_io		= s3c2416_map_io,
+		.init_clocks	= s3c2416_init_clocks,
+		.init_uarts	= s3c2416_init_uarts,
+		.init		= s3c2416_init,
+		.name		= name_s3c2416,
+	},
+	{
+		.idcode		= 0x32443001,
+		.idmask		= 0xffffffff,
+		.map_io		= s3c2443_map_io,
+		.init_clocks	= s3c2443_init_clocks,
+		.init_uarts	= s3c2443_init_uarts,
+		.init		= s3c2443_init,
+		.name		= name_s3c2443,
+	},
+};
+
+/* minimal IO mapping */
+
+static struct map_desc s3c_iodesc[] __initdata = {
+	IODESC_ENT(GPIO),
+	IODESC_ENT(IRQ),
+	IODESC_ENT(MEMCTRL),
+	IODESC_ENT(UART)
+};
+
+/* read cpu identificaiton code */
+
+static unsigned long s3c24xx_read_idcode_v5(void)
+{
+#if defined(CONFIG_CPU_S3C2416)
+	/* s3c2416 is v5, with S3C24XX_GSTATUS1 instead of S3C2412_GSTATUS1 */
+
+	u32 gs = __raw_readl(S3C24XX_GSTATUS1);
+
+	/* test for s3c2416 or similar device */
+	if ((gs >> 16) == 0x3245)
+		return gs;
+#endif
+
+#if defined(CONFIG_CPU_S3C2412) || defined(CONFIG_CPU_S3C2413)
+	return __raw_readl(S3C2412_GSTATUS1);
+#else
+	return 1UL;	/* don't look like an 2400 */
+#endif
+}
+
+static unsigned long s3c24xx_read_idcode_v4(void)
+{
+	return __raw_readl(S3C2410_GSTATUS1);
+}
+
+static void s3c24xx_default_idle(void)
+{
+	unsigned long tmp;
+	int i;
+
+	/* idle the system by using the idle mode which will wait for an
+	 * interrupt to happen before restarting the system.
+	 */
+
+	/* Warning: going into idle state upsets jtag scanning */
+
+	__raw_writel(__raw_readl(S3C2410_CLKCON) | S3C2410_CLKCON_IDLE,
+		     S3C2410_CLKCON);
+
+	/* the samsung port seems to do a loop and then unset idle.. */
+	for (i = 0; i < 50; i++)
+		tmp += __raw_readl(S3C2410_CLKCON); /* ensure loop not optimised out */
+
+	/* this bit is not cleared on re-start... */
+
+	__raw_writel(__raw_readl(S3C2410_CLKCON) & ~S3C2410_CLKCON_IDLE,
+		     S3C2410_CLKCON);
+}
+
+void __init s3c24xx_init_io(struct map_desc *mach_desc, int size)
+{
+	arm_pm_idle = s3c24xx_default_idle;
+
+	/* initialise the io descriptors we need for initialisation */
+	iotable_init(mach_desc, size);
+	iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc));
+
+	if (cpu_architecture() >= CPU_ARCH_ARMv5) {
+		samsung_cpu_id = s3c24xx_read_idcode_v5();
+	} else {
+		samsung_cpu_id = s3c24xx_read_idcode_v4();
+	}
+	s3c24xx_init_cpu();
+
+	s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
+}