1 files changed, 251 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c24xx/s3c2412.c b/arch/arm/mach-s3c24xx/s3c2412.c
new file mode 100644
index 000000000000..c6eac9871093
--- /dev/null
+++ b/arch/arm/mach-s3c24xx/s3c2412.c
@@ -0,0 +1,251 @@
+/* linux/arch/arm/mach-s3c2412/s3c2412.c
+ *
+ * Copyright (c) 2006 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *
+ * http://armlinux.simtec.co.uk/.
+ *
+ * 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/clk.h>
+#include <linux/delay.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/proc-fns.h>
+#include <asm/irq.h>
+
+#include <plat/cpu-freq.h>
+
+#include <mach/regs-clock.h>
+#include <plat/regs-serial.h>
+#include <mach/regs-power.h>
+#include <mach/regs-gpio.h>
+#include <mach/regs-gpioj.h>
+#include <mach/regs-dsc.h>
+#include <plat/regs-spi.h>
+#include <mach/regs-s3c2412.h>
+
+#include <plat/s3c2412.h>
+#include <plat/cpu.h>
+#include <plat/devs.h>
+#include <plat/clock.h>
+#include <plat/pm.h>
+#include <plat/pll.h>
+#include <plat/nand-core.h>
+
+#ifndef CONFIG_CPU_S3C2412_ONLY
+void __iomem *s3c24xx_va_gpio2 = S3C24XX_VA_GPIO;
+
+static inline void s3c2412_init_gpio2(void)
+{
+        s3c24xx_va_gpio2 = S3C24XX_VA_GPIO + 0x10;
+}
+#else
+#define s3c2412_init_gpio2() do { } while(0)
+#endif
+
+/* Initial IO mappings */
+
+static struct map_desc s3c2412_iodesc[] __initdata = {
+        IODESC_ENT(CLKPWR),
+        IODESC_ENT(TIMER),
+        IODESC_ENT(WATCHDOG),
+        {
+                .virtual = (unsigned long)S3C2412_VA_SSMC,
+                .pfn     = __phys_to_pfn(S3C2412_PA_SSMC),
+                .length  = SZ_1M,
+                .type    = MT_DEVICE,
+        },
+        {
+                .virtual = (unsigned long)S3C2412_VA_EBI,
+                .pfn     = __phys_to_pfn(S3C2412_PA_EBI),
+                .length  = SZ_1M,
+                .type    = MT_DEVICE,
+        },
+};
+
+/* uart registration process */
+
+void __init s3c2412_init_uarts(struct s3c2410_uartcfg *cfg, int no)
+{
+        s3c24xx_init_uartdevs("s3c2412-uart", s3c2410_uart_resources, cfg, no);
+
+        /* rename devices that are s3c2412/s3c2413 specific */
+        s3c_device_sdi.name  = "s3c2412-sdi";
+        s3c_device_lcd.name  = "s3c2412-lcd";
+        s3c_nand_setname("s3c2412-nand");
+
+        /* alter IRQ of SDI controller */
+
+        s3c_device_sdi.resource[1].start = IRQ_S3C2412_SDI;
+        s3c_device_sdi.resource[1].end   = IRQ_S3C2412_SDI;
+
+        /* spi channel related changes, s3c2412/13 specific */
+        s3c_device_spi0.name = "s3c2412-spi";
+        s3c_device_spi0.resource[0].end = S3C24XX_PA_SPI + 0x24;
+        s3c_device_spi1.name = "s3c2412-spi";
+        s3c_device_spi1.resource[0].start = S3C24XX_PA_SPI + S3C2412_SPI1;
+        s3c_device_spi1.resource[0].end = S3C24XX_PA_SPI + S3C2412_SPI1 + 0x24;
+
+}
+
+/* s3c2412_idle
+ *
+ * use the standard idle call by ensuring the idle mode
+ * in power config, then issuing the idle co-processor
+ * instruction
+*/
+
+static void s3c2412_idle(void)
+{
+        unsigned long tmp;
+
+        /* ensure our idle mode is to go to idle */
+
+        tmp = __raw_readl(S3C2412_PWRCFG);
+        tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK;
+        tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE;
+        __raw_writel(tmp, S3C2412_PWRCFG);
+
+        cpu_do_idle();
+}
+
+void s3c2412_restart(char mode, const char *cmd)
+{
+        if (mode == 's')
+                soft_restart(0);
+
+        /* errata "Watch-dog/Software Reset Problem" specifies that
+         * this reset must be done with the SYSCLK sourced from
+         * EXTCLK instead of FOUT to avoid a glitch in the reset
+         * mechanism.
+         *
+         * See the watchdog section of the S3C2412 manual for more
+         * information on this fix.
+         */
+
+        __raw_writel(0x00, S3C2412_CLKSRC);
+        __raw_writel(S3C2412_SWRST_RESET, S3C2412_SWRST);
+
+        mdelay(1);
+}
+
+/* s3c2412_map_io
+ *
+ * register the standard cpu IO areas, and any passed in from the
+ * machine specific initialisation.
+*/
+
+void __init s3c2412_map_io(void)
+{
+        /* move base of IO */
+
+        s3c2412_init_gpio2();
+
+        /* set our idle function */
+
+        arm_pm_idle = s3c2412_idle;
+
+        /* register our io-tables */
+
+        iotable_init(s3c2412_iodesc, ARRAY_SIZE(s3c2412_iodesc));
+}
+
+void __init_or_cpufreq s3c2412_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 * 2);
+
+        clk_mpll.rate = fclk;
+
+        tmp = __raw_readl(S3C2410_CLKDIVN);
+
+        /* work out clock scalings */
+
+        hclk = fclk / ((tmp & S3C2412_CLKDIVN_HDIVN_MASK) + 1);
+        hclk /= ((tmp & S3C2412_CLKDIVN_ARMDIVN) ? 2 : 1);
+        pclk = hclk / ((tmp & S3C2412_CLKDIVN_PDIVN) ? 2 : 1);
+
+        /* print brieft summary of clocks, etc */
+
+        printk("S3C2412: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
+               print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));
+
+        s3c24xx_setup_clocks(fclk, hclk, pclk);
+}
+
+void __init s3c2412_init_clocks(int xtal)
+{
+        /* initialise the clocks here, to allow other things like the
+         * console to use them
+         */
+
+        s3c24xx_register_baseclocks(xtal);
+        s3c2412_setup_clocks();
+        s3c2412_baseclk_add();
+}
+
+/* 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 s3c2412 based system)
+ * as a driver which may support both 2410 and 2440 may try and use it.
+*/
+
+struct bus_type s3c2412_subsys = {
+        .name = "s3c2412-core",
+        .dev_name = "s3c2412-core",
+};
+
+static int __init s3c2412_core_init(void)
+{
+        return subsys_system_register(&s3c2412_subsys, NULL);
+}
+
+core_initcall(s3c2412_core_init);
+
+static struct device s3c2412_dev = {
+        .bus            = &s3c2412_subsys,
+};
+
+int __init s3c2412_init(void)
+{
+        printk("S3C2412: Initialising architecture\n");
+
+#ifdef CONFIG_PM
+        register_syscore_ops(&s3c2412_pm_syscore_ops);
+#endif
+        register_syscore_ops(&s3c24xx_irq_syscore_ops);
+
+        return device_register(&s3c2412_dev);
+}