Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 241 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c2410/cpu.c b/arch/arm/mach-s3c2410/cpu.c
new file mode 100644
index 00000000000..ca366e9e264
--- /dev/null
+++ b/arch/arm/mach-s3c2410/cpu.c
@@ -0,0 +1,241 @@
+/* linux/arch/arm/mach-s3c2410/cpu.c
+ *
+ * Copyright (c) 2004-2005 Simtec Electronics
+ *	http://www.simtec.co.uk/products/SWLINUX/
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C24XX CPU Support
+ *
+ * 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/device.h>
+
+#include <asm/hardware.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/delay.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+
+#include <asm/arch/regs-gpio.h>
+
+#include "cpu.h"
+#include "clock.h"
+#include "s3c2410.h"
+#include "s3c2440.h"
+
+struct cpu_table {
+	unsigned long	idcode;
+	unsigned long	idmask;
+	void		(*map_io)(struct map_desc *mach_desc, int size);
+	void		(*init_uarts)(struct s3c2410_uartcfg *cfg, int no);
+	void		(*init_clocks)(int xtal);
+	int		(*init)(void);
+	const char	*name;
+};
+
+/* table of supported CPUs */
+
+static const char name_s3c2410[]  = "S3C2410";
+static const char name_s3c2440[]  = "S3C2440";
+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		= s3c2410_init,
+		.name		= name_s3c2410a
+	},
+	{
+		.idcode		= 0x32440000,
+		.idmask		= 0xffffffff,
+		.map_io		= s3c2440_map_io,
+		.init_clocks	= s3c2440_init_clocks,
+		.init_uarts	= s3c2440_init_uarts,
+		.init		= s3c2440_init,
+		.name		= name_s3c2440
+	},
+	{
+		.idcode		= 0x32440001,
+		.idmask		= 0xffffffff,
+		.map_io		= s3c2440_map_io,
+		.init_clocks	= s3c2440_init_clocks,
+		.init_uarts	= s3c2440_init_uarts,
+		.init		= s3c2440_init,
+		.name		= name_s3c2440a
+	}
+};
+
+/* minimal IO mapping */
+
+static struct map_desc s3c_iodesc[] __initdata = {
+	IODESC_ENT(GPIO),
+	IODESC_ENT(IRQ),
+	IODESC_ENT(MEMCTRL),
+	IODESC_ENT(UART)
+};
+
+
+static struct cpu_table *
+s3c_lookup_cpu(unsigned long idcode)
+{
+	struct cpu_table *tab;
+	int count;
+
+	tab = cpu_ids;
+	for (count = 0; count < ARRAY_SIZE(cpu_ids); count++, tab++) {
+		if ((idcode & tab->idmask) == tab->idcode)
+			return tab;
+	}
+
+	return NULL;
+}
+
+/* board information */
+
+static struct s3c24xx_board *board;
+
+void s3c24xx_set_board(struct s3c24xx_board *b)
+{
+	int i;
+
+	board = b;
+
+	if (b->clocks_count != 0) {
+		struct clk **ptr = b->clocks;;
+
+		for (i = b->clocks_count; i > 0; i--, ptr++)
+			s3c24xx_register_clock(*ptr);
+	}
+}
+
+/* cpu information */
+
+static struct cpu_table *cpu;
+
+void __init s3c24xx_init_io(struct map_desc *mach_desc, int size)
+{
+	unsigned long idcode;
+
+	/* initialise the io descriptors we need for initialisation */
+	iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc));
+
+	idcode = __raw_readl(S3C2410_GSTATUS1);
+	cpu = s3c_lookup_cpu(idcode);
+
+	if (cpu == NULL) {
+		printk(KERN_ERR "Unknown CPU type 0x%08lx\n", idcode);
+		panic("Unknown S3C24XX CPU");
+	}
+
+	if (cpu->map_io == NULL || cpu->init == NULL) {
+		printk(KERN_ERR "CPU %s support not enabled\n", cpu->name);
+		panic("Unsupported S3C24XX CPU");
+	}
+
+	printk("CPU %s (id 0x%08lx)\n", cpu->name, idcode);
+
+	(cpu->map_io)(mach_desc, size);
+}
+
+/* s3c24xx_init_clocks
+ *
+ * Initialise the clock subsystem and associated information from the
+ * given master crystal value.
+ *
+ * xtal  = 0 -> use default PLL crystal value (normally 12MHz)
+ *      != 0 -> PLL crystal value in Hz
+*/
+
+void __init s3c24xx_init_clocks(int xtal)
+{
+	if (xtal == 0)
+		xtal = 12*1000*1000;
+
+	if (cpu == NULL)
+		panic("s3c24xx_init_clocks: no cpu setup?\n");
+
+	if (cpu->init_clocks == NULL)
+		panic("s3c24xx_init_clocks: cpu has no clock init\n");
+	else
+		(cpu->init_clocks)(xtal);
+}
+
+void __init s3c24xx_init_uarts(struct s3c2410_uartcfg *cfg, int no)
+{
+	if (cpu == NULL)
+		return;
+
+	if (cpu->init_uarts == NULL) {
+		printk(KERN_ERR "s3c24xx_init_uarts: cpu has no uart init\n");
+	} else
+		(cpu->init_uarts)(cfg, no);
+}
+
+static int __init s3c_arch_init(void)
+{
+	int ret;
+
+	// do the correct init for cpu
+
+	if (cpu == NULL)
+		panic("s3c_arch_init: NULL cpu\n");
+
+	ret = (cpu->init)();
+	if (ret != 0)
+		return ret;
+
+	if (board != NULL) {
+		struct platform_device **ptr = board->devices;
+		int i;
+
+		for (i = 0; i < board->devices_count; i++, ptr++) {
+			ret = platform_device_register(*ptr);
+
+			if (ret) {
+				printk(KERN_ERR "s3c24xx: failed to add board device %s (%d) @%p\n", (*ptr)->name, ret, *ptr);
+			}
+		}
+
+		/* mask any error, we may not need all these board
+		 * devices */
+		ret = 0;
+	}
+
+	return ret;
+}
+
+arch_initcall(s3c_arch_init);