1 files changed, 206 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c24xx/s3c2410.c b/arch/arm/mach-s3c24xx/s3c2410.c
new file mode 100644
index 00000000000..061b6bb1a55
--- /dev/null
+++ b/arch/arm/mach-s3c24xx/s3c2410.c
@@ -0,0 +1,206 @@
+/* linux/arch/arm/mach-s3c2410/s3c2410.c
+ *
+ * Copyright (c) 2003-2005 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *
+ * http://www.simtec.co.uk/products/EB2410ITX/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/timer.h>
+#include <linux/init.h>
+#include <linux/gpio.h>
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/syscore_ops.h>
+#include <linux/serial_core.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/irq.h>
+
+#include <mach/hardware.h>
+#include <asm/irq.h>
+
+#include <plat/cpu-freq.h>
+
+#include <mach/regs-clock.h>
+#include <plat/regs-serial.h>
+
+#include <plat/s3c2410.h>
+#include <plat/cpu.h>
+#include <plat/devs.h>
+#include <plat/clock.h>
+#include <plat/pll.h>
+#include <plat/pm.h>
+#include <plat/watchdog-reset.h>
+
+#include <plat/gpio-core.h>
+#include <plat/gpio-cfg.h>
+#include <plat/gpio-cfg-helpers.h>
+
+/* Initial IO mappings */
+
+static struct map_desc s3c2410_iodesc[] __initdata = {
+        IODESC_ENT(CLKPWR),
+        IODESC_ENT(TIMER),
+        IODESC_ENT(WATCHDOG),
+};
+
+/* our uart devices */
+
+/* uart registration process */
+
+void __init s3c2410_init_uarts(struct s3c2410_uartcfg *cfg, int no)
+{
+        s3c24xx_init_uartdevs("s3c2410-uart", s3c2410_uart_resources, cfg, no);
+}
+
+/* s3c2410_map_io
+ *
+ * register the standard cpu IO areas, and any passed in from the
+ * machine specific initialisation.
+*/
+
+void __init s3c2410_map_io(void)
+{
+        s3c24xx_gpiocfg_default.set_pull = s3c24xx_gpio_setpull_1up;
+        s3c24xx_gpiocfg_default.get_pull = s3c24xx_gpio_getpull_1up;
+
+        iotable_init(s3c2410_iodesc, ARRAY_SIZE(s3c2410_iodesc));
+}
+
+void __init_or_cpufreq s3c2410_setup_clocks(void)
+{
+        struct clk *xtal_clk;
+        unsigned long tmp;
+        unsigned long xtal;
+        unsigned long fclk;
+        unsigned long hclk;
+        unsigned long pclk;
+
+        xtal_clk = clk_get(NULL, "xtal");
+        xtal = clk_get_rate(xtal_clk);
+        clk_put(xtal_clk);
+
+        /* now we've got our machine bits initialised, work out what
+         * clocks we've got */
+
+        fclk = s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON), xtal);
+
+        tmp = __raw_readl(S3C2410_CLKDIVN);
+
+        /* work out clock scalings */
+
+        hclk = fclk / ((tmp & S3C2410_CLKDIVN_HDIVN) ? 2 : 1);
+        pclk = hclk / ((tmp & S3C2410_CLKDIVN_PDIVN) ? 2 : 1);
+
+        /* print brieft summary of clocks, etc */
+
+        printk("S3C2410: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
+               print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));
+
+        /* initialise the clocks here, to allow other things like the
+         * console to use them
+         */
+
+        s3c24xx_setup_clocks(fclk, hclk, pclk);
+}
+
+/* fake ARMCLK for use with cpufreq, etc. */
+
+static struct clk s3c2410_armclk = {
+        .name   = "armclk",
+        .parent = &clk_f,
+        .id     = -1,
+};
+
+static struct clk_lookup s3c2410_clk_lookup[] = {
+        CLKDEV_INIT(NULL, "clk_uart_baud0", &clk_p),
+        CLKDEV_INIT(NULL, "clk_uart_baud1", &s3c24xx_uclk),
+};
+
+void __init s3c2410_init_clocks(int xtal)
+{
+        s3c24xx_register_baseclocks(xtal);
+        s3c2410_setup_clocks();
+        s3c2410_baseclk_add();
+        s3c24xx_register_clock(&s3c2410_armclk);
+        clkdev_add_table(s3c2410_clk_lookup, ARRAY_SIZE(s3c2410_clk_lookup));
+}
+
+struct bus_type s3c2410_subsys = {
+        .name = "s3c2410-core",
+        .dev_name = "s3c2410-core",
+};
+
+/* Note, we would have liked to name this s3c2410-core, but we cannot
+ * register two subsystems with the same name.
+ */
+struct bus_type s3c2410a_subsys = {
+        .name = "s3c2410a-core",
+        .dev_name = "s3c2410a-core",
+};
+
+static struct device s3c2410_dev = {
+        .bus            = &s3c2410_subsys,
+};
+
+/* need to register the subsystem before we actually register the device, and
+ * we also need to ensure that it has been initialised before any of the
+ * drivers even try to use it (even if not on an s3c2410 based system)
+ * as a driver which may support both 2410 and 2440 may try and use it.
+*/
+
+static int __init s3c2410_core_init(void)
+{
+        return subsys_system_register(&s3c2410_subsys, NULL);
+}
+
+core_initcall(s3c2410_core_init);
+
+static int __init s3c2410a_core_init(void)
+{
+        return subsys_system_register(&s3c2410a_subsys, NULL);
+}
+
+core_initcall(s3c2410a_core_init);
+
+int __init s3c2410_init(void)
+{
+        printk("S3C2410: Initialising architecture\n");
+
+#ifdef CONFIG_PM
+        register_syscore_ops(&s3c2410_pm_syscore_ops);
+#endif
+        register_syscore_ops(&s3c24xx_irq_syscore_ops);
+
+        return device_register(&s3c2410_dev);
+}
+
+int __init s3c2410a_init(void)
+{
+        s3c2410_dev.bus = &s3c2410a_subsys;
+        return s3c2410_init();
+}
+
+void s3c2410_restart(char mode, const char *cmd)
+{
+        if (mode == 's') {
+                soft_restart(0);
+        }
+
+        arch_wdt_reset();
+
+        /* we'll take a jump through zero as a poor second */
+        soft_restart(0);
+}