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Diffstat (limited to 'arch/arm/mach-s3c24xx/s3c244x.c')
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diff --git a/arch/arm/mach-s3c24xx/s3c244x.c b/arch/arm/mach-s3c24xx/s3c244x.c
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+++ b/arch/arm/mach-s3c24xx/s3c244x.c
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+/* linux/arch/arm/plat-s3c24xx/s3c244x.c
+ *
+ * Copyright (c) 2004-2006 Simtec Electronics
+ * Ben Dooks <ben@simtec.co.uk>
+ *
+ * Samsung S3C2440 and S3C2442 Mobile CPU support (not S3C2443)
+ *
+ * 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/serial_core.h>
+#include <linux/platform_device.h>
+#include <linux/device.h>
+#include <linux/syscore_ops.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+
+#include <asm/system_misc.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 <mach/regs-gpio.h>
+#include <mach/regs-gpioj.h>
+#include <mach/regs-dsc.h>
+
+#include <plat/s3c2410.h>
+#include <plat/s3c244x.h>
+#include <plat/clock.h>
+#include <plat/devs.h>
+#include <plat/cpu.h>
+#include <plat/pm.h>
+#include <plat/pll.h>
+#include <plat/nand-core.h>
+#include <plat/watchdog-reset.h>
+
+static struct map_desc s3c244x_iodesc[] __initdata = {
+ IODESC_ENT(CLKPWR),
+ IODESC_ENT(TIMER),
+ IODESC_ENT(WATCHDOG),
+};
+
+/* uart initialisation */
+
+void __init s3c244x_init_uarts(struct s3c2410_uartcfg *cfg, int no)
+{
+ s3c24xx_init_uartdevs("s3c2440-uart", s3c2410_uart_resources, cfg, no);
+}
+
+void __init s3c244x_map_io(void)
+{
+ /* register our io-tables */
+
+ iotable_init(s3c244x_iodesc, ARRAY_SIZE(s3c244x_iodesc));
+
+ /* rename any peripherals used differing from the s3c2410 */
+
+ s3c_device_sdi.name = "s3c2440-sdi";
+ s3c_device_i2c0.name = "s3c2440-i2c";
+ s3c_nand_setname("s3c2440-nand");
+ s3c_device_ts.name = "s3c2440-ts";
+ s3c_device_usbgadget.name = "s3c2440-usbgadget";
+}
+
+void __init_or_cpufreq s3c244x_setup_clocks(void)
+{
+ struct clk *xtal_clk;
+ unsigned long clkdiv;
+ unsigned long camdiv;
+ unsigned long xtal;
+ unsigned long hclk, fclk, pclk;
+ int hdiv = 1;
+
+ xtal_clk = clk_get(NULL, "xtal");
+ xtal = clk_get_rate(xtal_clk);
+ clk_put(xtal_clk);
+
+ fclk = s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON), xtal) * 2;
+
+ clkdiv = __raw_readl(S3C2410_CLKDIVN);
+ camdiv = __raw_readl(S3C2440_CAMDIVN);
+
+ /* work out clock scalings */
+
+ switch (clkdiv & S3C2440_CLKDIVN_HDIVN_MASK) {
+ case S3C2440_CLKDIVN_HDIVN_1:
+ hdiv = 1;
+ break;
+
+ case S3C2440_CLKDIVN_HDIVN_2:
+ hdiv = 2;
+ break;
+
+ case S3C2440_CLKDIVN_HDIVN_4_8:
+ hdiv = (camdiv & S3C2440_CAMDIVN_HCLK4_HALF) ? 8 : 4;
+ break;
+
+ case S3C2440_CLKDIVN_HDIVN_3_6:
+ hdiv = (camdiv & S3C2440_CAMDIVN_HCLK3_HALF) ? 6 : 3;
+ break;
+ }
+
+ hclk = fclk / hdiv;
+ pclk = hclk / ((clkdiv & S3C2440_CLKDIVN_PDIVN) ? 2 : 1);
+
+ /* print brief summary of clocks, etc */
+
+ printk("S3C244X: 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 s3c244x_init_clocks(int xtal)
+{
+ /* initialise the clocks here, to allow other things like the
+ * console to use them, and to add new ones after the initialisation
+ */
+
+ s3c24xx_register_baseclocks(xtal);
+ s3c244x_setup_clocks();
+ s3c2410_baseclk_add();
+}
+
+/* Since the S3C2442 and S3C2440 share items, put both subsystems here */
+
+struct bus_type s3c2440_subsys = {
+ .name = "s3c2440-core",
+ .dev_name = "s3c2440-core",
+};
+
+struct bus_type s3c2442_subsys = {
+ .name = "s3c2442-core",
+ .dev_name = "s3c2442-core",
+};
+
+/* 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 s3c2440 based system)
+ * as a driver which may support both 2410 and 2440 may try and use it.
+*/
+
+static int __init s3c2440_core_init(void)
+{
+ return subsys_system_register(&s3c2440_subsys, NULL);
+}
+
+core_initcall(s3c2440_core_init);
+
+static int __init s3c2442_core_init(void)
+{
+ return subsys_system_register(&s3c2442_subsys, NULL);
+}
+
+core_initcall(s3c2442_core_init);
+
+
+#ifdef CONFIG_PM
+static struct sleep_save s3c244x_sleep[] = {
+ SAVE_ITEM(S3C2440_DSC0),
+ SAVE_ITEM(S3C2440_DSC1),
+ SAVE_ITEM(S3C2440_GPJDAT),
+ SAVE_ITEM(S3C2440_GPJCON),
+ SAVE_ITEM(S3C2440_GPJUP)
+};
+
+static int s3c244x_suspend(void)
+{
+ s3c_pm_do_save(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
+ return 0;
+}
+
+static void s3c244x_resume(void)
+{
+ s3c_pm_do_restore(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
+}
+#else
+#define s3c244x_suspend NULL
+#define s3c244x_resume NULL
+#endif
+
+struct syscore_ops s3c244x_pm_syscore_ops = {
+ .suspend = s3c244x_suspend,
+ .resume = s3c244x_resume,
+};
+
+void s3c244x_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);
+}